diff options
Diffstat (limited to 'fs')
561 files changed, 25314 insertions, 23299 deletions
diff --git a/fs/9p/Kconfig b/fs/9p/Kconfig index 7952337..814ac4e 100644 --- a/fs/9p/Kconfig +++ b/fs/9p/Kconfig @@ -9,6 +9,8 @@ config 9P_FS If unsure, say N. +if 9P_FS + config 9P_FSCACHE bool "Enable 9P client caching support (EXPERIMENTAL)" depends on EXPERIMENTAL @@ -17,3 +19,17 @@ config 9P_FSCACHE Choose Y here to enable persistent, read-only local caching support for 9p clients using FS-Cache + +config 9P_FS_POSIX_ACL + bool "9P POSIX Access Control Lists" + select FS_POSIX_ACL + help + POSIX Access Control Lists (ACLs) support permissions for users and + groups beyond the owner/group/world scheme. + + To learn more about Access Control Lists, visit the POSIX ACLs for + Linux website <http://acl.bestbits.at/>. + + If you don't know what Access Control Lists are, say N + +endif diff --git a/fs/9p/Makefile b/fs/9p/Makefile index 91fba02..ab8c127 100644 --- a/fs/9p/Makefile +++ b/fs/9p/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_9P_FS) := 9p.o 9p-objs := \ vfs_super.o \ vfs_inode.o \ + vfs_inode_dotl.o \ vfs_addr.o \ vfs_file.o \ vfs_dir.o \ @@ -13,3 +14,4 @@ obj-$(CONFIG_9P_FS) := 9p.o xattr_user.o 9p-$(CONFIG_9P_FSCACHE) += cache.o +9p-$(CONFIG_9P_FS_POSIX_ACL) += acl.o diff --git a/fs/9p/acl.c b/fs/9p/acl.c new file mode 100644 index 0000000..02a2cf6 --- /dev/null +++ b/fs/9p/acl.c @@ -0,0 +1,395 @@ +/* + * Copyright IBM Corporation, 2010 + * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ + +#include <linux/module.h> +#include <linux/fs.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> +#include <linux/slab.h> +#include <linux/sched.h> +#include <linux/posix_acl_xattr.h> +#include "xattr.h" +#include "acl.h" +#include "v9fs_vfs.h" +#include "v9fs.h" + +static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name) +{ + ssize_t size; + void *value = NULL; + struct posix_acl *acl = NULL; + + size = v9fs_fid_xattr_get(fid, name, NULL, 0); + if (size > 0) { + value = kzalloc(size, GFP_NOFS); + if (!value) + return ERR_PTR(-ENOMEM); + size = v9fs_fid_xattr_get(fid, name, value, size); + if (size > 0) { + acl = posix_acl_from_xattr(value, size); + if (IS_ERR(acl)) + goto err_out; + } + } else if (size == -ENODATA || size == 0 || + size == -ENOSYS || size == -EOPNOTSUPP) { + acl = NULL; + } else + acl = ERR_PTR(-EIO); + +err_out: + kfree(value); + return acl; +} + +int v9fs_get_acl(struct inode *inode, struct p9_fid *fid) +{ + int retval = 0; + struct posix_acl *pacl, *dacl; + struct v9fs_session_info *v9ses; + + v9ses = v9fs_inode2v9ses(inode); + if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) { + set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL); + set_cached_acl(inode, ACL_TYPE_ACCESS, NULL); + return 0; + } + /* get the default/access acl values and cache them */ + dacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_DEFAULT); + pacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_ACCESS); + + if (!IS_ERR(dacl) && !IS_ERR(pacl)) { + set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl); + set_cached_acl(inode, ACL_TYPE_ACCESS, pacl); + posix_acl_release(dacl); + posix_acl_release(pacl); + } else + retval = -EIO; + + return retval; +} + +static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type) +{ + struct posix_acl *acl; + /* + * 9p Always cache the acl value when + * instantiating the inode (v9fs_inode_from_fid) + */ + acl = get_cached_acl(inode, type); + BUG_ON(acl == ACL_NOT_CACHED); + return acl; +} + +int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags) +{ + struct posix_acl *acl; + struct v9fs_session_info *v9ses; + + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + + v9ses = v9fs_inode2v9ses(inode); + if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) { + /* + * On access = client mode get the acl + * values from the server + */ + return 0; + } + acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS); + + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (acl) { + int error = posix_acl_permission(inode, acl, mask); + posix_acl_release(acl); + return error; + } + return -EAGAIN; +} + +static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl) +{ + int retval; + char *name; + size_t size; + void *buffer; + struct inode *inode = dentry->d_inode; + + set_cached_acl(inode, type, acl); + /* Set a setxattr request to server */ + size = posix_acl_xattr_size(acl->a_count); + buffer = kmalloc(size, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + retval = posix_acl_to_xattr(acl, buffer, size); + if (retval < 0) + goto err_free_out; + switch (type) { + case ACL_TYPE_ACCESS: + name = POSIX_ACL_XATTR_ACCESS; + break; + case ACL_TYPE_DEFAULT: + name = POSIX_ACL_XATTR_DEFAULT; + break; + default: + BUG(); + } + retval = v9fs_xattr_set(dentry, name, buffer, size, 0); +err_free_out: + kfree(buffer); + return retval; +} + +int v9fs_acl_chmod(struct dentry *dentry) +{ + int retval = 0; + struct posix_acl *acl, *clone; + struct inode *inode = dentry->d_inode; + + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS); + if (acl) { + clone = posix_acl_clone(acl, GFP_KERNEL); + posix_acl_release(acl); + if (!clone) + return -ENOMEM; + retval = posix_acl_chmod_masq(clone, inode->i_mode); + if (!retval) + retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, clone); + posix_acl_release(clone); + } + return retval; +} + +int v9fs_set_create_acl(struct dentry *dentry, + struct posix_acl *dpacl, struct posix_acl *pacl) +{ + if (dpacl) + v9fs_set_acl(dentry, ACL_TYPE_DEFAULT, dpacl); + if (pacl) + v9fs_set_acl(dentry, ACL_TYPE_ACCESS, pacl); + posix_acl_release(dpacl); + posix_acl_release(pacl); + return 0; +} + +int v9fs_acl_mode(struct inode *dir, mode_t *modep, + struct posix_acl **dpacl, struct posix_acl **pacl) +{ + int retval = 0; + mode_t mode = *modep; + struct posix_acl *acl = NULL; + + if (!S_ISLNK(mode)) { + acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT); + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (!acl) + mode &= ~current_umask(); + } + if (acl) { + struct posix_acl *clone; + + if (S_ISDIR(mode)) + *dpacl = acl; + clone = posix_acl_clone(acl, GFP_NOFS); + retval = -ENOMEM; + if (!clone) + goto cleanup; + + retval = posix_acl_create_masq(clone, &mode); + if (retval < 0) { + posix_acl_release(clone); + goto cleanup; + } + if (retval > 0) + *pacl = clone; + } + *modep = mode; + return 0; +cleanup: + posix_acl_release(acl); + return retval; + +} + +static int v9fs_remote_get_acl(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) +{ + char *full_name; + + switch (type) { + case ACL_TYPE_ACCESS: + full_name = POSIX_ACL_XATTR_ACCESS; + break; + case ACL_TYPE_DEFAULT: + full_name = POSIX_ACL_XATTR_DEFAULT; + break; + default: + BUG(); + } + return v9fs_xattr_get(dentry, full_name, buffer, size); +} + +static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name, + void *buffer, size_t size, int type) +{ + struct v9fs_session_info *v9ses; + struct posix_acl *acl; + int error; + + if (strcmp(name, "") != 0) + return -EINVAL; + + v9ses = v9fs_inode2v9ses(dentry->d_inode); + /* + * We allow set/get/list of acl when access=client is not specified + */ + if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) + return v9fs_remote_get_acl(dentry, name, buffer, size, type); + + acl = v9fs_get_cached_acl(dentry->d_inode, type); + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (acl == NULL) + return -ENODATA; + error = posix_acl_to_xattr(acl, buffer, size); + posix_acl_release(acl); + + return error; +} + +static int v9fs_remote_set_acl(struct dentry *dentry, const char *name, + const void *value, size_t size, + int flags, int type) +{ + char *full_name; + + switch (type) { + case ACL_TYPE_ACCESS: + full_name = POSIX_ACL_XATTR_ACCESS; + break; + case ACL_TYPE_DEFAULT: + full_name = POSIX_ACL_XATTR_DEFAULT; + break; + default: + BUG(); + } + return v9fs_xattr_set(dentry, full_name, value, size, flags); +} + + +static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name, + const void *value, size_t size, + int flags, int type) +{ + int retval; + struct posix_acl *acl; + struct v9fs_session_info *v9ses; + struct inode *inode = dentry->d_inode; + + if (strcmp(name, "") != 0) + return -EINVAL; + + v9ses = v9fs_inode2v9ses(dentry->d_inode); + /* + * set the attribute on the remote. Without even looking at the + * xattr value. We leave it to the server to validate + */ + if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) + return v9fs_remote_set_acl(dentry, name, + value, size, flags, type); + + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + if (!is_owner_or_cap(inode)) + return -EPERM; + if (value) { + /* update the cached acl value */ + acl = posix_acl_from_xattr(value, size); + if (IS_ERR(acl)) + return PTR_ERR(acl); + else if (acl) { + retval = posix_acl_valid(acl); + if (retval) + goto err_out; + } + } else + acl = NULL; + + switch (type) { + case ACL_TYPE_ACCESS: + name = POSIX_ACL_XATTR_ACCESS; + if (acl) { + mode_t mode = inode->i_mode; + retval = posix_acl_equiv_mode(acl, &mode); + if (retval < 0) + goto err_out; + else { + struct iattr iattr; + if (retval == 0) { + /* + * ACL can be represented + * by the mode bits. So don't + * update ACL. + */ + acl = NULL; + value = NULL; + size = 0; + } + /* Updte the mode bits */ + iattr.ia_mode = ((mode & S_IALLUGO) | + (inode->i_mode & ~S_IALLUGO)); + iattr.ia_valid = ATTR_MODE; + /* FIXME should we update ctime ? + * What is the following setxattr update the + * mode ? + */ + v9fs_vfs_setattr_dotl(dentry, &iattr); + } + } + break; + case ACL_TYPE_DEFAULT: + name = POSIX_ACL_XATTR_DEFAULT; + if (!S_ISDIR(inode->i_mode)) { + retval = acl ? -EINVAL : 0; + goto err_out; + } + break; + default: + BUG(); + } + retval = v9fs_xattr_set(dentry, name, value, size, flags); + if (!retval) + set_cached_acl(inode, type, acl); +err_out: + posix_acl_release(acl); + return retval; +} + +const struct xattr_handler v9fs_xattr_acl_access_handler = { + .prefix = POSIX_ACL_XATTR_ACCESS, + .flags = ACL_TYPE_ACCESS, + .get = v9fs_xattr_get_acl, + .set = v9fs_xattr_set_acl, +}; + +const struct xattr_handler v9fs_xattr_acl_default_handler = { + .prefix = POSIX_ACL_XATTR_DEFAULT, + .flags = ACL_TYPE_DEFAULT, + .get = v9fs_xattr_get_acl, + .set = v9fs_xattr_set_acl, +}; diff --git a/fs/9p/acl.h b/fs/9p/acl.h new file mode 100644 index 0000000..7ef3ac9 --- /dev/null +++ b/fs/9p/acl.h @@ -0,0 +1,49 @@ +/* + * Copyright IBM Corporation, 2010 + * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2.1 of the GNU Lesser General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + */ +#ifndef FS_9P_ACL_H +#define FS_9P_ACL_H + +#ifdef CONFIG_9P_FS_POSIX_ACL +extern int v9fs_get_acl(struct inode *, struct p9_fid *); +extern int v9fs_check_acl(struct inode *inode, int mask, unsigned int flags); +extern int v9fs_acl_chmod(struct dentry *); +extern int v9fs_set_create_acl(struct dentry *, + struct posix_acl *, struct posix_acl *); +extern int v9fs_acl_mode(struct inode *dir, mode_t *modep, + struct posix_acl **dpacl, struct posix_acl **pacl); +#else +#define v9fs_check_acl NULL +static inline int v9fs_get_acl(struct inode *inode, struct p9_fid *fid) +{ + return 0; +} +static inline int v9fs_acl_chmod(struct dentry *dentry) +{ + return 0; +} +static inline int v9fs_set_create_acl(struct dentry *dentry, + struct posix_acl *dpacl, + struct posix_acl *pacl) +{ + return 0; +} +static inline int v9fs_acl_mode(struct inode *dir, mode_t *modep, + struct posix_acl **dpacl, + struct posix_acl **pacl) +{ + return 0; +} + +#endif +#endif /* FS_9P_XATTR_H */ diff --git a/fs/9p/fid.c b/fs/9p/fid.c index 6406f89..b00223c 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -149,6 +149,7 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry) switch (access) { case V9FS_ACCESS_SINGLE: case V9FS_ACCESS_USER: + case V9FS_ACCESS_CLIENT: uid = current_fsuid(); any = 0; break; diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 38dc0e0..2f77cd3 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -193,7 +193,17 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) v9ses->flags |= V9FS_ACCESS_USER; else if (strcmp(s, "any") == 0) v9ses->flags |= V9FS_ACCESS_ANY; - else { + else if (strcmp(s, "client") == 0) { +#ifdef CONFIG_9P_FS_POSIX_ACL + v9ses->flags |= V9FS_ACCESS_CLIENT; +#else + P9_DPRINTK(P9_DEBUG_ERROR, + "access=client option not supported\n"); + kfree(s); + ret = -EINVAL; + goto free_and_return; +#endif + } else { v9ses->flags |= V9FS_ACCESS_SINGLE; v9ses->uid = simple_strtoul(s, &e, 10); if (*e != '\0') @@ -278,6 +288,16 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ; + if (!v9fs_proto_dotl(v9ses) && + ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) { + /* + * We support ACCESS_CLIENT only for dotl. + * Fall back to ACCESS_USER + */ + v9ses->flags &= ~V9FS_ACCESS_MASK; + v9ses->flags |= V9FS_ACCESS_USER; + } + /*FIXME !! */ /* for legacy mode, fall back to V9FS_ACCESS_ANY */ if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) && ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) { diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 4c963c9..c4b5d88 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -33,13 +33,17 @@ * * Session flags reflect options selected by users at mount time */ +#define V9FS_ACCESS_ANY (V9FS_ACCESS_SINGLE | \ + V9FS_ACCESS_USER | \ + V9FS_ACCESS_CLIENT) +#define V9FS_ACCESS_MASK V9FS_ACCESS_ANY + enum p9_session_flags { V9FS_PROTO_2000U = 0x01, V9FS_PROTO_2000L = 0x02, V9FS_ACCESS_SINGLE = 0x04, V9FS_ACCESS_USER = 0x08, - V9FS_ACCESS_ANY = 0x0C, - V9FS_ACCESS_MASK = 0x0C, + V9FS_ACCESS_CLIENT = 0x10 }; /* possible values of ->cache */ @@ -109,11 +113,27 @@ struct v9fs_session_info { struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *, char *); -void v9fs_session_close(struct v9fs_session_info *v9ses); -void v9fs_session_cancel(struct v9fs_session_info *v9ses); -void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses); +extern void v9fs_session_close(struct v9fs_session_info *v9ses); +extern void v9fs_session_cancel(struct v9fs_session_info *v9ses); +extern void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses); +extern struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *nameidata); +extern int v9fs_vfs_unlink(struct inode *i, struct dentry *d); +extern int v9fs_vfs_rmdir(struct inode *i, struct dentry *d); +extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry); +extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, + void *p); +extern struct inode *v9fs_inode(struct v9fs_session_info *v9ses, + struct p9_fid *fid, + struct super_block *sb); -#define V9FS_MAGIC 0x01021997 +extern const struct inode_operations v9fs_dir_inode_operations_dotl; +extern const struct inode_operations v9fs_file_inode_operations_dotl; +extern const struct inode_operations v9fs_symlink_inode_operations_dotl; +extern struct inode *v9fs_inode_dotl(struct v9fs_session_info *v9ses, + struct p9_fid *fid, + struct super_block *sb); /* other default globals */ #define V9FS_PORT 564 @@ -136,3 +156,21 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses) { return v9ses->flags & V9FS_PROTO_2000L; } + +/** + * v9fs_inode_from_fid - Helper routine to populate an inode by + * issuing a attribute request + * @v9ses: session information + * @fid: fid to issue attribute request for + * @sb: superblock on which to create inode + * + */ +static inline struct inode * +v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + if (v9fs_proto_dotl(v9ses)) + return v9fs_inode_dotl(v9ses, fid, sb); + else + return v9fs_inode(v9ses, fid, sb); +} diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index 88418c4..bab0eac 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -64,3 +64,7 @@ int v9fs_uflags2omode(int uflags, int extended); ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64); void v9fs_blank_wstat(struct p9_wstat *wstat); +int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *); +int v9fs_file_fsync_dotl(struct file *filp, int datasync); + +#define P9_LOCK_TIMEOUT (30*HZ) diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 90e3844..b7f2a8e 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -154,10 +154,40 @@ static int v9fs_launder_page(struct page *page) return 0; } +/** + * v9fs_direct_IO - 9P address space operation for direct I/O + * @rw: direction (read or write) + * @iocb: target I/O control block + * @iov: array of vectors that define I/O buffer + * @pos: offset in file to begin the operation + * @nr_segs: size of iovec array + * + * The presence of v9fs_direct_IO() in the address space ops vector + * allowes open() O_DIRECT flags which would have failed otherwise. + * + * In the non-cached mode, we shunt off direct read and write requests before + * the VFS gets them, so this method should never be called. + * + * Direct IO is not 'yet' supported in the cached mode. Hence when + * this routine is called through generic_file_aio_read(), the read/write fails + * with an error. + * + */ +ssize_t v9fs_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, + loff_t pos, unsigned long nr_segs) +{ + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_direct_IO: v9fs_direct_IO (%s) " + "off/no(%lld/%lu) EINVAL\n", + iocb->ki_filp->f_path.dentry->d_name.name, + (long long) pos, nr_segs); + + return -EINVAL; +} const struct address_space_operations v9fs_addr_operations = { .readpage = v9fs_vfs_readpage, .readpages = v9fs_vfs_readpages, .releasepage = v9fs_release_page, .invalidatepage = v9fs_invalidate_page, .launder_page = v9fs_launder_page, + .direct_IO = v9fs_direct_IO, }; diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c index cbf4e50..466d2a4 100644 --- a/fs/9p/vfs_dentry.c +++ b/fs/9p/vfs_dentry.c @@ -51,7 +51,7 @@ * */ -static int v9fs_dentry_delete(struct dentry *dentry) +static int v9fs_dentry_delete(const struct dentry *dentry) { P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, dentry); @@ -68,7 +68,7 @@ static int v9fs_dentry_delete(struct dentry *dentry) * */ -static int v9fs_cached_dentry_delete(struct dentry *dentry) +static int v9fs_cached_dentry_delete(const struct dentry *dentry) { struct inode *inode = dentry->d_inode; P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name, diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c index 899f168..b84ebe8 100644 --- a/fs/9p/vfs_dir.c +++ b/fs/9p/vfs_dir.c @@ -242,7 +242,8 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent, while (rdir->head < rdir->tail) { err = p9dirent_read(rdir->buf + rdir->head, - buflen - rdir->head, &curdirent, + rdir->tail - rdir->head, + &curdirent, fid->clnt->proto_version); if (err < 0) { P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err); @@ -314,4 +315,5 @@ const struct file_operations v9fs_dir_operations_dotl = { .readdir = v9fs_dir_readdir_dotl, .open = v9fs_file_open, .release = v9fs_dir_release, + .fsync = v9fs_file_fsync_dotl, }; diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index e97c92b..240c306 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -33,6 +33,7 @@ #include <linux/inet.h> #include <linux/list.h> #include <linux/pagemap.h> +#include <linux/utsname.h> #include <asm/uaccess.h> #include <linux/idr.h> #include <net/9p/9p.h> @@ -44,6 +45,7 @@ #include "cache.h" static const struct file_operations v9fs_cached_file_operations; +static const struct file_operations v9fs_cached_file_operations_dotl; /** * v9fs_file_open - open a file (or directory) @@ -92,6 +94,8 @@ int v9fs_file_open(struct inode *inode, struct file *file) /* enable cached file options */ if(file->f_op == &v9fs_file_operations) file->f_op = &v9fs_cached_file_operations; + else if (file->f_op == &v9fs_file_operations_dotl) + file->f_op = &v9fs_cached_file_operations_dotl; #ifdef CONFIG_9P_FSCACHE v9fs_cache_inode_set_cookie(inode, file); @@ -130,6 +134,206 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl) return res; } +static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl) +{ + struct p9_flock flock; + struct p9_fid *fid; + uint8_t status; + int res = 0; + unsigned char fl_type; + + fid = filp->private_data; + BUG_ON(fid == NULL); + + if ((fl->fl_flags & FL_POSIX) != FL_POSIX) + BUG(); + + res = posix_lock_file_wait(filp, fl); + if (res < 0) + goto out; + + /* convert posix lock to p9 tlock args */ + memset(&flock, 0, sizeof(flock)); + flock.type = fl->fl_type; + flock.start = fl->fl_start; + if (fl->fl_end == OFFSET_MAX) + flock.length = 0; + else + flock.length = fl->fl_end - fl->fl_start + 1; + flock.proc_id = fl->fl_pid; + flock.client_id = utsname()->nodename; + if (IS_SETLKW(cmd)) + flock.flags = P9_LOCK_FLAGS_BLOCK; + + /* + * if its a blocked request and we get P9_LOCK_BLOCKED as the status + * for lock request, keep on trying + */ + for (;;) { + res = p9_client_lock_dotl(fid, &flock, &status); + if (res < 0) + break; + + if (status != P9_LOCK_BLOCKED) + break; + if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd)) + break; + schedule_timeout_interruptible(P9_LOCK_TIMEOUT); + } + + /* map 9p status to VFS status */ + switch (status) { + case P9_LOCK_SUCCESS: + res = 0; + break; + case P9_LOCK_BLOCKED: + res = -EAGAIN; + break; + case P9_LOCK_ERROR: + case P9_LOCK_GRACE: + res = -ENOLCK; + break; + default: + BUG(); + } + + /* + * incase server returned error for lock request, revert + * it locally + */ + if (res < 0 && fl->fl_type != F_UNLCK) { + fl_type = fl->fl_type; + fl->fl_type = F_UNLCK; + res = posix_lock_file_wait(filp, fl); + fl->fl_type = fl_type; + } +out: + return res; +} + +static int v9fs_file_getlock(struct file *filp, struct file_lock *fl) +{ + struct p9_getlock glock; + struct p9_fid *fid; + int res = 0; + + fid = filp->private_data; + BUG_ON(fid == NULL); + + posix_test_lock(filp, fl); + /* + * if we have a conflicting lock locally, no need to validate + * with server + */ + if (fl->fl_type != F_UNLCK) + return res; + + /* convert posix lock to p9 tgetlock args */ + memset(&glock, 0, sizeof(glock)); + glock.type = fl->fl_type; + glock.start = fl->fl_start; + if (fl->fl_end == OFFSET_MAX) + glock.length = 0; + else + glock.length = fl->fl_end - fl->fl_start + 1; + glock.proc_id = fl->fl_pid; + glock.client_id = utsname()->nodename; + + res = p9_client_getlock_dotl(fid, &glock); + if (res < 0) + return res; + if (glock.type != F_UNLCK) { + fl->fl_type = glock.type; + fl->fl_start = glock.start; + if (glock.length == 0) + fl->fl_end = OFFSET_MAX; + else + fl->fl_end = glock.start + glock.length - 1; + fl->fl_pid = glock.proc_id; + } else + fl->fl_type = F_UNLCK; + + return res; +} + +/** + * v9fs_file_lock_dotl - lock a file (or directory) + * @filp: file to be locked + * @cmd: lock command + * @fl: file lock structure + * + */ + +static int v9fs_file_lock_dotl(struct file *filp, int cmd, struct file_lock *fl) +{ + struct inode *inode = filp->f_path.dentry->d_inode; + int ret = -ENOLCK; + + P9_DPRINTK(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n", filp, + cmd, fl, filp->f_path.dentry->d_name.name); + + /* No mandatory locks */ + if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) + goto out_err; + + if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { + filemap_write_and_wait(inode->i_mapping); + invalidate_mapping_pages(&inode->i_data, 0, -1); + } + + if (IS_SETLK(cmd) || IS_SETLKW(cmd)) + ret = v9fs_file_do_lock(filp, cmd, fl); + else if (IS_GETLK(cmd)) + ret = v9fs_file_getlock(filp, fl); + else + ret = -EINVAL; +out_err: + return ret; +} + +/** + * v9fs_file_flock_dotl - lock a file + * @filp: file to be locked + * @cmd: lock command + * @fl: file lock structure + * + */ + +static int v9fs_file_flock_dotl(struct file *filp, int cmd, + struct file_lock *fl) +{ + struct inode *inode = filp->f_path.dentry->d_inode; + int ret = -ENOLCK; + + P9_DPRINTK(P9_DEBUG_VFS, "filp: %p cmd:%d lock: %p name: %s\n", filp, + cmd, fl, filp->f_path.dentry->d_name.name); + + /* No mandatory locks */ + if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK) + goto out_err; + + if (!(fl->fl_flags & FL_FLOCK)) + goto out_err; + + if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) { + filemap_write_and_wait(inode->i_mapping); + invalidate_mapping_pages(&inode->i_data, 0, -1); + } + /* Convert flock to posix lock */ + fl->fl_owner = (fl_owner_t)filp; + fl->fl_start = 0; + fl->fl_end = OFFSET_MAX; + fl->fl_flags |= FL_POSIX; + fl->fl_flags ^= FL_FLOCK; + + if (IS_SETLK(cmd) | IS_SETLKW(cmd)) + ret = v9fs_file_do_lock(filp, cmd, fl); + else + ret = -EINVAL; +out_err: + return ret; +} + /** * v9fs_file_readn - read from a file * @filp: file pointer to read @@ -219,7 +423,9 @@ static ssize_t v9fs_file_write(struct file *filp, const char __user * data, size_t count, loff_t * offset) { - int n, rsize, total = 0; + ssize_t retval; + size_t total = 0; + int n; struct p9_fid *fid; struct p9_client *clnt; struct inode *inode = filp->f_path.dentry->d_inode; @@ -232,14 +438,19 @@ v9fs_file_write(struct file *filp, const char __user * data, fid = filp->private_data; clnt = fid->clnt; - rsize = fid->iounit ? fid->iounit : clnt->msize - P9_IOHDRSZ; + retval = generic_write_checks(filp, &origin, &count, 0); + if (retval) + goto out; - do { - if (count < rsize) - rsize = count; + retval = -EINVAL; + if ((ssize_t) count < 0) + goto out; + retval = 0; + if (!count) + goto out; - n = p9_client_write(fid, NULL, data+total, origin+total, - rsize); + do { + n = p9_client_write(fid, NULL, data+total, origin+total, count); if (n <= 0) break; count -= n; @@ -258,9 +469,11 @@ v9fs_file_write(struct file *filp, const char __user * data, } if (n < 0) - return n; - - return total; + retval = n; + else + retval = total; +out: + return retval; } static int v9fs_file_fsync(struct file *filp, int datasync) @@ -278,6 +491,20 @@ static int v9fs_file_fsync(struct file *filp, int datasync) return retval; } +int v9fs_file_fsync_dotl(struct file *filp, int datasync) +{ + struct p9_fid *fid; + int retval; + + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_file_fsync_dotl: filp %p datasync %x\n", + filp, datasync); + + fid = filp->private_data; + + retval = p9_client_fsync(fid, datasync); + return retval; +} + static const struct file_operations v9fs_cached_file_operations = { .llseek = generic_file_llseek, .read = do_sync_read, @@ -290,6 +517,19 @@ static const struct file_operations v9fs_cached_file_operations = { .fsync = v9fs_file_fsync, }; +static const struct file_operations v9fs_cached_file_operations_dotl = { + .llseek = generic_file_llseek, + .read = do_sync_read, + .aio_read = generic_file_aio_read, + .write = v9fs_file_write, + .open = v9fs_file_open, + .release = v9fs_dir_release, + .lock = v9fs_file_lock_dotl, + .flock = v9fs_file_flock_dotl, + .mmap = generic_file_readonly_mmap, + .fsync = v9fs_file_fsync_dotl, +}; + const struct file_operations v9fs_file_operations = { .llseek = generic_file_llseek, .read = v9fs_file_read, @@ -307,7 +547,8 @@ const struct file_operations v9fs_file_operations_dotl = { .write = v9fs_file_write, .open = v9fs_file_open, .release = v9fs_dir_release, - .lock = v9fs_file_lock, + .lock = v9fs_file_lock_dotl, + .flock = v9fs_file_flock_dotl, .mmap = generic_file_readonly_mmap, - .fsync = v9fs_file_fsync, + .fsync = v9fs_file_fsync_dotl, }; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index ef5905f..5076eeb 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -36,6 +36,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/xattr.h> +#include <linux/posix_acl.h> #include <net/9p/9p.h> #include <net/9p/client.h> @@ -44,14 +45,12 @@ #include "fid.h" #include "cache.h" #include "xattr.h" +#include "acl.h" static const struct inode_operations v9fs_dir_inode_operations; static const struct inode_operations v9fs_dir_inode_operations_dotu; -static const struct inode_operations v9fs_dir_inode_operations_dotl; static const struct inode_operations v9fs_file_inode_operations; -static const struct inode_operations v9fs_file_inode_operations_dotl; static const struct inode_operations v9fs_symlink_inode_operations; -static const struct inode_operations v9fs_symlink_inode_operations_dotl; /** * unixmode2p9mode - convert unix mode bits to plan 9 @@ -231,46 +230,18 @@ struct inode *v9fs_alloc_inode(struct super_block *sb) * */ -void v9fs_destroy_inode(struct inode *inode) +static void v9fs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(vcookie_cache, v9fs_inode2cookie(inode)); } -#endif - -/** - * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a - * new file system object. This checks the S_ISGID to determine the owning - * group of the new file system object. - */ - -static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) -{ - BUG_ON(dir_inode == NULL); - - if (dir_inode->i_mode & S_ISGID) { - /* set_gid bit is set.*/ - return dir_inode->i_gid; - } - return current_fsgid(); -} - -/** - * v9fs_dentry_from_dir_inode - helper function to get the dentry from - * dir inode. - * - */ -static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) +void v9fs_destroy_inode(struct inode *inode) { - struct dentry *dentry; - - spin_lock(&dcache_lock); - /* Directory should have only one entry. */ - BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); - dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); - spin_unlock(&dcache_lock); - return dentry; + call_rcu(&inode->i_rcu, v9fs_i_callback); } +#endif /** * v9fs_get_inode - helper function to setup an inode @@ -441,7 +412,7 @@ void v9fs_evict_inode(struct inode *inode) #endif } -static struct inode * +struct inode * v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid, struct super_block *sb) { @@ -476,55 +447,6 @@ error: return ERR_PTR(err); } -static struct inode * -v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, - struct super_block *sb) -{ - struct inode *ret = NULL; - int err; - struct p9_stat_dotl *st; - - st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); - if (IS_ERR(st)) - return ERR_CAST(st); - - ret = v9fs_get_inode(sb, st->st_mode); - if (IS_ERR(ret)) { - err = PTR_ERR(ret); - goto error; - } - - v9fs_stat2inode_dotl(st, ret); - ret->i_ino = v9fs_qid2ino(&st->qid); -#ifdef CONFIG_9P_FSCACHE - v9fs_vcookie_set_qid(ret, &st->qid); - v9fs_cache_inode_get_cookie(ret); -#endif - kfree(st); - return ret; -error: - kfree(st); - return ERR_PTR(err); -} - -/** - * v9fs_inode_from_fid - Helper routine to populate an inode by - * issuing a attribute request - * @v9ses: session information - * @fid: fid to issue attribute request for - * @sb: superblock on which to create inode - * - */ -static inline struct inode * -v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, - struct super_block *sb) -{ - if (v9fs_proto_dotl(v9ses)) - return v9fs_inode_dotl(v9ses, fid, sb); - else - return v9fs_inode(v9ses, fid, sb); -} - /** * v9fs_remove - helper function to remove files and directories * @dir: directory inode that is being deleted @@ -553,13 +475,6 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) return retval; } -static int -v9fs_open_created(struct inode *inode, struct file *file) -{ - return 0; -} - - /** * v9fs_create - Create a file * @v9ses: session information @@ -622,12 +537,6 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); goto error; } - - if (v9ses->cache) - dentry->d_op = &v9fs_cached_dentry_operations; - else - dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); err = v9fs_fid_add(dentry, fid); if (err < 0) @@ -646,121 +555,6 @@ error: } /** - * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. - * @dir: directory inode that is being created - * @dentry: dentry that is being deleted - * @mode: create permissions - * @nd: path information - * - */ - -static int -v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *nd) -{ - int err = 0; - char *name = NULL; - gid_t gid; - int flags; - struct v9fs_session_info *v9ses; - struct p9_fid *fid = NULL; - struct p9_fid *dfid, *ofid; - struct file *filp; - struct p9_qid qid; - struct inode *inode; - - v9ses = v9fs_inode2v9ses(dir); - if (nd && nd->flags & LOOKUP_OPEN) - flags = nd->intent.open.flags - 1; - else - flags = O_RDWR; - - name = (char *) dentry->d_name.name; - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " - "mode:0x%x\n", name, flags, mode); - - dfid = v9fs_fid_lookup(dentry->d_parent); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - return err; - } - - /* clone a fid to use for creation */ - ofid = p9_client_walk(dfid, 0, NULL, 1); - if (IS_ERR(ofid)) { - err = PTR_ERR(ofid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); - return err; - } - - gid = v9fs_get_fsgid_for_create(dir); - err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); - if (err < 0) { - P9_DPRINTK(P9_DEBUG_VFS, - "p9_client_open_dotl failed in creat %d\n", - err); - goto error; - } - - /* No need to populate the inode if we are not opening the file AND - * not in cached mode. - */ - if (!v9ses->cache && !(nd && nd->flags & LOOKUP_OPEN)) { - /* Not in cached mode. No need to populate inode with stat */ - dentry->d_op = &v9fs_dentry_operations; - p9_client_clunk(ofid); - d_instantiate(dentry, NULL); - return 0; - } - - /* Now walk from the parent so we can get an unopened fid. */ - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); - fid = NULL; - goto error; - } - - /* instantiate inode and assign the unopened fid to dentry */ - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); - goto error; - } - if (v9ses->cache) - dentry->d_op = &v9fs_cached_dentry_operations; - else - dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - - /* if we are opening a file, assign the open fid to the file */ - if (nd && nd->flags & LOOKUP_OPEN) { - filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); - if (IS_ERR(filp)) { - p9_client_clunk(ofid); - return PTR_ERR(filp); - } - filp->private_data = ofid; - } else - p9_client_clunk(ofid); - - return 0; - -error: - if (ofid) - p9_client_clunk(ofid); - if (fid) - p9_client_clunk(fid); - return err; -} - -/** * v9fs_vfs_create - VFS hook to create files * @dir: directory inode that is being created * @dentry: dentry that is being deleted @@ -800,7 +594,7 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, /* if we are opening a file, assign the open fid to the file */ if (nd && nd->flags & LOOKUP_OPEN) { - filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); + filp = lookup_instantiate_filp(nd, dentry, generic_file_open); if (IS_ERR(filp)) { err = PTR_ERR(filp); goto error; @@ -850,83 +644,6 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) return err; } - -/** - * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory - * @dir: inode that is being unlinked - * @dentry: dentry that is being unlinked - * @mode: mode for new directory - * - */ - -static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, - int mode) -{ - int err; - struct v9fs_session_info *v9ses; - struct p9_fid *fid = NULL, *dfid = NULL; - gid_t gid; - char *name; - struct inode *inode; - struct p9_qid qid; - struct dentry *dir_dentry; - - P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); - err = 0; - v9ses = v9fs_inode2v9ses(dir); - - mode |= S_IFDIR; - dir_dentry = v9fs_dentry_from_dir_inode(dir); - dfid = v9fs_fid_lookup(dir_dentry); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - dfid = NULL; - goto error; - } - - gid = v9fs_get_fsgid_for_create(dir); - if (gid < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); - goto error; - } - - name = (char *) dentry->d_name.name; - err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); - if (err < 0) - goto error; - - /* instantiate inode and assign the unopened fid to the dentry */ - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - dentry->d_op = &v9fs_cached_dentry_operations; - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - fid = NULL; - } -error: - if (fid) - p9_client_clunk(fid); - return err; -} - /** * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode * @dir: inode that is being walked from @@ -935,7 +652,7 @@ error: * */ -static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, +struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nameidata) { struct super_block *sb; @@ -979,17 +696,19 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, result = v9fs_fid_add(dentry, fid); if (result < 0) - goto error; + goto error_iput; inst_out: if (v9ses->cache) - dentry->d_op = &v9fs_cached_dentry_operations; + d_set_d_op(dentry, &v9fs_cached_dentry_operations); else - dentry->d_op = &v9fs_dentry_operations; + d_set_d_op(dentry, &v9fs_dentry_operations); d_add(dentry, inode); return NULL; +error_iput: + iput(inode); error: p9_client_clunk(fid); @@ -1003,7 +722,7 @@ error: * */ -static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) +int v9fs_vfs_unlink(struct inode *i, struct dentry *d) { return v9fs_remove(i, d, 0); } @@ -1015,7 +734,7 @@ static int v9fs_vfs_unlink(struct inode *i, struct dentry *d) * */ -static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) +int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) { return v9fs_remove(i, d, 1); } @@ -1029,7 +748,7 @@ static int v9fs_vfs_rmdir(struct inode *i, struct dentry *d) * */ -static int +int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { @@ -1136,42 +855,6 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, return 0; } -static int -v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, - struct kstat *stat) -{ - int err; - struct v9fs_session_info *v9ses; - struct p9_fid *fid; - struct p9_stat_dotl *st; - - P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); - err = -EPERM; - v9ses = v9fs_inode2v9ses(dentry->d_inode); - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) - return simple_getattr(mnt, dentry, stat); - - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - /* Ask for all the fields in stat structure. Server will return - * whatever it supports - */ - - st = p9_client_getattr_dotl(fid, P9_STATS_ALL); - if (IS_ERR(st)) - return PTR_ERR(st); - - v9fs_stat2inode_dotl(st, dentry->d_inode); - generic_fillattr(dentry->d_inode, stat); - /* Change block size to what the server returned */ - stat->blksize = st->st_blksize; - - kfree(st); - return 0; -} - /** * v9fs_vfs_setattr - set file metadata * @dentry: file whose metadata to set @@ -1231,58 +914,6 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) } /** - * v9fs_vfs_setattr_dotl - set file metadata - * @dentry: file whose metadata to set - * @iattr: metadata assignment structure - * - */ - -static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) -{ - int retval; - struct v9fs_session_info *v9ses; - struct p9_fid *fid; - struct p9_iattr_dotl p9attr; - - P9_DPRINTK(P9_DEBUG_VFS, "\n"); - - retval = inode_change_ok(dentry->d_inode, iattr); - if (retval) - return retval; - - p9attr.valid = iattr->ia_valid; - p9attr.mode = iattr->ia_mode; - p9attr.uid = iattr->ia_uid; - p9attr.gid = iattr->ia_gid; - p9attr.size = iattr->ia_size; - p9attr.atime_sec = iattr->ia_atime.tv_sec; - p9attr.atime_nsec = iattr->ia_atime.tv_nsec; - p9attr.mtime_sec = iattr->ia_mtime.tv_sec; - p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; - - retval = -EPERM; - v9ses = v9fs_inode2v9ses(dentry->d_inode); - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - retval = p9_client_setattr(fid, &p9attr); - if (retval < 0) - return retval; - - if ((iattr->ia_valid & ATTR_SIZE) && - iattr->ia_size != i_size_read(dentry->d_inode)) { - retval = vmtruncate(dentry->d_inode, iattr->ia_size); - if (retval) - return retval; - } - - setattr_copy(dentry->d_inode, iattr); - mark_inode_dirty(dentry->d_inode); - return 0; -} - -/** * v9fs_stat2inode - populate an inode structure with mistat info * @stat: Plan 9 metadata (mistat) structure * @inode: inode to populate @@ -1360,77 +991,6 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, } /** - * v9fs_stat2inode_dotl - populate an inode structure with stat info - * @stat: stat structure - * @inode: inode to populate - * @sb: superblock of filesystem - * - */ - -void -v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) -{ - - if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { - inode->i_atime.tv_sec = stat->st_atime_sec; - inode->i_atime.tv_nsec = stat->st_atime_nsec; - inode->i_mtime.tv_sec = stat->st_mtime_sec; - inode->i_mtime.tv_nsec = stat->st_mtime_nsec; - inode->i_ctime.tv_sec = stat->st_ctime_sec; - inode->i_ctime.tv_nsec = stat->st_ctime_nsec; - inode->i_uid = stat->st_uid; - inode->i_gid = stat->st_gid; - inode->i_nlink = stat->st_nlink; - inode->i_mode = stat->st_mode; - inode->i_rdev = new_decode_dev(stat->st_rdev); - - if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) - init_special_inode(inode, inode->i_mode, inode->i_rdev); - - i_size_write(inode, stat->st_size); - inode->i_blocks = stat->st_blocks; - } else { - if (stat->st_result_mask & P9_STATS_ATIME) { - inode->i_atime.tv_sec = stat->st_atime_sec; - inode->i_atime.tv_nsec = stat->st_atime_nsec; - } - if (stat->st_result_mask & P9_STATS_MTIME) { - inode->i_mtime.tv_sec = stat->st_mtime_sec; - inode->i_mtime.tv_nsec = stat->st_mtime_nsec; - } - if (stat->st_result_mask & P9_STATS_CTIME) { - inode->i_ctime.tv_sec = stat->st_ctime_sec; - inode->i_ctime.tv_nsec = stat->st_ctime_nsec; - } - if (stat->st_result_mask & P9_STATS_UID) - inode->i_uid = stat->st_uid; - if (stat->st_result_mask & P9_STATS_GID) - inode->i_gid = stat->st_gid; - if (stat->st_result_mask & P9_STATS_NLINK) - inode->i_nlink = stat->st_nlink; - if (stat->st_result_mask & P9_STATS_MODE) { - inode->i_mode = stat->st_mode; - if ((S_ISBLK(inode->i_mode)) || - (S_ISCHR(inode->i_mode))) - init_special_inode(inode, inode->i_mode, - inode->i_rdev); - } - if (stat->st_result_mask & P9_STATS_RDEV) - inode->i_rdev = new_decode_dev(stat->st_rdev); - if (stat->st_result_mask & P9_STATS_SIZE) - i_size_write(inode, stat->st_size); - if (stat->st_result_mask & P9_STATS_BLOCKS) - inode->i_blocks = stat->st_blocks; - } - if (stat->st_result_mask & P9_STATS_GEN) - inode->i_generation = stat->st_gen; - - /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION - * because the inode structure does not have fields for them. - */ -} - -/** * v9fs_qid2ino - convert qid into inode number * @qid: qid to hash * @@ -1473,7 +1033,7 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) if (IS_ERR(fid)) return PTR_ERR(fid); - if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) + if (!v9fs_proto_dotu(v9ses)) return -EBADF; st = p9_client_stat(fid); @@ -1536,7 +1096,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) * */ -static void +void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void *p) { char *s = nd_get_link(nd); @@ -1580,99 +1140,6 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, } /** - * v9fs_vfs_symlink_dotl - helper function to create symlinks - * @dir: directory inode containing symlink - * @dentry: dentry for symlink - * @symname: symlink data - * - * See Also: 9P2000.L RFC for more information - * - */ - -static int -v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, - const char *symname) -{ - struct v9fs_session_info *v9ses; - struct p9_fid *dfid; - struct p9_fid *fid = NULL; - struct inode *inode; - struct p9_qid qid; - char *name; - int err; - gid_t gid; - - name = (char *) dentry->d_name.name; - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", - dir->i_ino, name, symname); - v9ses = v9fs_inode2v9ses(dir); - - dfid = v9fs_fid_lookup(dentry->d_parent); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - return err; - } - - gid = v9fs_get_fsgid_for_create(dir); - - if (gid < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_egid failed %d\n", gid); - goto error; - } - - /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ - err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); - - if (err < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); - goto error; - } - - if (v9ses->cache) { - /* Now walk from the parent so we can get an unopened fid. */ - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - /* instantiate inode and assign the unopened fid to dentry */ - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - dentry->d_op = &v9fs_cached_dentry_operations; - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - fid = NULL; - } else { - /* Not in cached mode. No need to populate inode with stat */ - inode = v9fs_get_inode(dir->i_sb, S_IFLNK); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - goto error; - } - dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); - } - -error: - if (fid) - p9_client_clunk(fid); - - return err; -} - -/** * v9fs_vfs_symlink - helper function to create symlinks * @dir: directory inode containing symlink * @dentry: dentry for symlink @@ -1731,77 +1198,6 @@ clunk_fid: } /** - * v9fs_vfs_link_dotl - create a hardlink for dotl - * @old_dentry: dentry for file to link to - * @dir: inode destination for new link - * @dentry: dentry for link - * - */ - -static int -v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry) -{ - int err; - struct p9_fid *dfid, *oldfid; - char *name; - struct v9fs_session_info *v9ses; - struct dentry *dir_dentry; - - P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", - dir->i_ino, old_dentry->d_name.name, - dentry->d_name.name); - - v9ses = v9fs_inode2v9ses(dir); - dir_dentry = v9fs_dentry_from_dir_inode(dir); - dfid = v9fs_fid_lookup(dir_dentry); - if (IS_ERR(dfid)) - return PTR_ERR(dfid); - - oldfid = v9fs_fid_lookup(old_dentry); - if (IS_ERR(oldfid)) - return PTR_ERR(oldfid); - - name = (char *) dentry->d_name.name; - - err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); - - if (err < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); - return err; - } - - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - /* Get the latest stat info from server. */ - struct p9_fid *fid; - struct p9_stat_dotl *st; - - fid = v9fs_fid_lookup(old_dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); - - st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); - if (IS_ERR(st)) - return PTR_ERR(st); - - v9fs_stat2inode_dotl(st, old_dentry->d_inode); - - kfree(st); - } else { - /* Caching disabled. No need to get upto date stat info. - * This dentry will be released immediately. So, just hold the - * inode - */ - ihold(old_dentry->d_inode); - } - - dentry->d_op = old_dentry->d_op; - d_instantiate(dentry, old_dentry->d_inode); - - return err; -} - -/** * v9fs_vfs_mknod - create a special file * @dir: inode destination for new link * @dentry: dentry for file @@ -1846,100 +1242,6 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) return retval; } -/** - * v9fs_vfs_mknod_dotl - create a special file - * @dir: inode destination for new link - * @dentry: dentry for file - * @mode: mode for creation - * @rdev: device associated with special file - * - */ -static int -v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, - dev_t rdev) -{ - int err; - char *name; - struct v9fs_session_info *v9ses; - struct p9_fid *fid = NULL, *dfid = NULL; - struct inode *inode; - gid_t gid; - struct p9_qid qid; - struct dentry *dir_dentry; - - P9_DPRINTK(P9_DEBUG_VFS, - " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, - dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); - - if (!new_valid_dev(rdev)) - return -EINVAL; - - v9ses = v9fs_inode2v9ses(dir); - dir_dentry = v9fs_dentry_from_dir_inode(dir); - dfid = v9fs_fid_lookup(dir_dentry); - if (IS_ERR(dfid)) { - err = PTR_ERR(dfid); - P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); - dfid = NULL; - goto error; - } - - gid = v9fs_get_fsgid_for_create(dir); - if (gid < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); - goto error; - } - - name = (char *) dentry->d_name.name; - - err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); - if (err < 0) - goto error; - - /* instantiate inode and assign the unopened fid to the dentry */ - if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { - fid = p9_client_walk(dfid, 1, &name, 1); - if (IS_ERR(fid)) { - err = PTR_ERR(fid); - P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", - err); - fid = NULL; - goto error; - } - - inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", - err); - goto error; - } - dentry->d_op = &v9fs_cached_dentry_operations; - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; - fid = NULL; - } else { - /* - * Not in cached mode. No need to populate inode with stat. - * socket syscall returns a fd, so we need instantiate - */ - inode = v9fs_get_inode(dir->i_sb, mode); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - goto error; - } - dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); - } - -error: - if (fid) - p9_client_clunk(fid); - return err; -} - static const struct inode_operations v9fs_dir_inode_operations_dotu = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, @@ -1954,25 +1256,6 @@ static const struct inode_operations v9fs_dir_inode_operations_dotu = { .setattr = v9fs_vfs_setattr, }; -static const struct inode_operations v9fs_dir_inode_operations_dotl = { - .create = v9fs_vfs_create_dotl, - .lookup = v9fs_vfs_lookup, - .link = v9fs_vfs_link_dotl, - .symlink = v9fs_vfs_symlink_dotl, - .unlink = v9fs_vfs_unlink, - .mkdir = v9fs_vfs_mkdir_dotl, - .rmdir = v9fs_vfs_rmdir, - .mknod = v9fs_vfs_mknod_dotl, - .rename = v9fs_vfs_rename, - .getattr = v9fs_vfs_getattr_dotl, - .setattr = v9fs_vfs_setattr_dotl, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, - .removexattr = generic_removexattr, - .listxattr = v9fs_listxattr, - -}; - static const struct inode_operations v9fs_dir_inode_operations = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, @@ -1990,15 +1273,6 @@ static const struct inode_operations v9fs_file_inode_operations = { .setattr = v9fs_vfs_setattr, }; -static const struct inode_operations v9fs_file_inode_operations_dotl = { - .getattr = v9fs_vfs_getattr_dotl, - .setattr = v9fs_vfs_setattr_dotl, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, - .removexattr = generic_removexattr, - .listxattr = v9fs_listxattr, -}; - static const struct inode_operations v9fs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = v9fs_vfs_follow_link, @@ -2007,14 +1281,3 @@ static const struct inode_operations v9fs_symlink_inode_operations = { .setattr = v9fs_vfs_setattr, }; -static const struct inode_operations v9fs_symlink_inode_operations_dotl = { - .readlink = generic_readlink, - .follow_link = v9fs_vfs_follow_link, - .put_link = v9fs_vfs_put_link, - .getattr = v9fs_vfs_getattr_dotl, - .setattr = v9fs_vfs_setattr_dotl, - .setxattr = generic_setxattr, - .getxattr = generic_getxattr, - .removexattr = generic_removexattr, - .listxattr = v9fs_listxattr, -}; diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c new file mode 100644 index 0000000..fe3ffa9 --- /dev/null +++ b/fs/9p/vfs_inode_dotl.c @@ -0,0 +1,824 @@ +/* + * linux/fs/9p/vfs_inode_dotl.c + * + * This file contains vfs inode ops for the 9P2000.L protocol. + * + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/file.h> +#include <linux/pagemap.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/inet.h> +#include <linux/namei.h> +#include <linux/idr.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/xattr.h> +#include <linux/posix_acl.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> + +#include "v9fs.h" +#include "v9fs_vfs.h" +#include "fid.h" +#include "cache.h" +#include "xattr.h" +#include "acl.h" + +static int +v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, + dev_t rdev); + +/** + * v9fs_get_fsgid_for_create - Helper function to get the gid for creating a + * new file system object. This checks the S_ISGID to determine the owning + * group of the new file system object. + */ + +static gid_t v9fs_get_fsgid_for_create(struct inode *dir_inode) +{ + BUG_ON(dir_inode == NULL); + + if (dir_inode->i_mode & S_ISGID) { + /* set_gid bit is set.*/ + return dir_inode->i_gid; + } + return current_fsgid(); +} + +/** + * v9fs_dentry_from_dir_inode - helper function to get the dentry from + * dir inode. + * + */ + +static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) +{ + struct dentry *dentry; + + spin_lock(&inode->i_lock); + /* Directory should have only one entry. */ + BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); + dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); + spin_unlock(&inode->i_lock); + return dentry; +} + +struct inode * +v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, + struct super_block *sb) +{ + struct inode *ret = NULL; + int err; + struct p9_stat_dotl *st; + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) + return ERR_CAST(st); + + ret = v9fs_get_inode(sb, st->st_mode); + if (IS_ERR(ret)) { + err = PTR_ERR(ret); + goto error; + } + + v9fs_stat2inode_dotl(st, ret); + ret->i_ino = v9fs_qid2ino(&st->qid); +#ifdef CONFIG_9P_FSCACHE + v9fs_vcookie_set_qid(ret, &st->qid); + v9fs_cache_inode_get_cookie(ret); +#endif + err = v9fs_get_acl(ret, fid); + if (err) { + iput(ret); + goto error; + } + kfree(st); + return ret; +error: + kfree(st); + return ERR_PTR(err); +} + +/** + * v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol. + * @dir: directory inode that is being created + * @dentry: dentry that is being deleted + * @mode: create permissions + * @nd: path information + * + */ + +static int +v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int omode, + struct nameidata *nd) +{ + int err = 0; + char *name = NULL; + gid_t gid; + int flags; + mode_t mode; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL; + struct p9_fid *dfid, *ofid; + struct file *filp; + struct p9_qid qid; + struct inode *inode; + struct posix_acl *pacl = NULL, *dacl = NULL; + + v9ses = v9fs_inode2v9ses(dir); + if (nd && nd->flags & LOOKUP_OPEN) + flags = nd->intent.open.flags - 1; + else { + /* + * create call without LOOKUP_OPEN is due + * to mknod of regular files. So use mknod + * operation. + */ + return v9fs_vfs_mknod_dotl(dir, dentry, omode, 0); + } + + name = (char *) dentry->d_name.name; + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_create_dotl: name:%s flags:0x%x " + "mode:0x%x\n", name, flags, omode); + + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + return err; + } + + /* clone a fid to use for creation */ + ofid = p9_client_walk(dfid, 0, NULL, 1); + if (IS_ERR(ofid)) { + err = PTR_ERR(ofid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); + return err; + } + + gid = v9fs_get_fsgid_for_create(dir); + + mode = omode; + /* Update mode based on ACL value */ + err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); + if (err) { + P9_DPRINTK(P9_DEBUG_VFS, + "Failed to get acl values in creat %d\n", err); + goto error; + } + err = p9_client_create_dotl(ofid, name, flags, mode, gid, &qid); + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, + "p9_client_open_dotl failed in creat %d\n", + err); + goto error; + } + + /* instantiate inode and assign the unopened fid to the dentry */ + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err); + fid = NULL; + goto error; + } + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); + goto error; + } + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); + + /* Since we are opening a file, assign the open fid to the file */ + filp = lookup_instantiate_filp(nd, dentry, generic_file_open); + if (IS_ERR(filp)) { + p9_client_clunk(ofid); + return PTR_ERR(filp); + } + filp->private_data = ofid; + return 0; + +error: + if (ofid) + p9_client_clunk(ofid); + if (fid) + p9_client_clunk(fid); + return err; +} + +/** + * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory + * @dir: inode that is being unlinked + * @dentry: dentry that is being unlinked + * @mode: mode for new directory + * + */ + +static int v9fs_vfs_mkdir_dotl(struct inode *dir, + struct dentry *dentry, int omode) +{ + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL, *dfid = NULL; + gid_t gid; + char *name; + mode_t mode; + struct inode *inode; + struct p9_qid qid; + struct dentry *dir_dentry; + struct posix_acl *dacl = NULL, *pacl = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); + err = 0; + v9ses = v9fs_inode2v9ses(dir); + + omode |= S_IFDIR; + if (dir->i_mode & S_ISGID) + omode |= S_ISGID; + + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + dfid = NULL; + goto error; + } + + gid = v9fs_get_fsgid_for_create(dir); + mode = omode; + /* Update mode based on ACL value */ + err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); + if (err) { + P9_DPRINTK(P9_DEBUG_VFS, + "Failed to get acl values in mkdir %d\n", err); + goto error; + } + name = (char *) dentry->d_name.name; + err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid); + if (err < 0) + goto error; + + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* + * Not in cached mode. No need to populate + * inode with stat. We need to get an inode + * so that we can set the acl with dentry + */ + inode = v9fs_get_inode(dir->i_sb, mode); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_instantiate(dentry, inode); + } + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); + +error: + if (fid) + p9_client_clunk(fid); + return err; +} + +static int +v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat) +{ + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_stat_dotl *st; + + P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); + err = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) + return simple_getattr(mnt, dentry, stat); + + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + /* Ask for all the fields in stat structure. Server will return + * whatever it supports + */ + + st = p9_client_getattr_dotl(fid, P9_STATS_ALL); + if (IS_ERR(st)) + return PTR_ERR(st); + + v9fs_stat2inode_dotl(st, dentry->d_inode); + generic_fillattr(dentry->d_inode, stat); + /* Change block size to what the server returned */ + stat->blksize = st->st_blksize; + + kfree(st); + return 0; +} + +/** + * v9fs_vfs_setattr_dotl - set file metadata + * @dentry: file whose metadata to set + * @iattr: metadata assignment structure + * + */ + +int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) +{ + int retval; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_iattr_dotl p9attr; + + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + + retval = inode_change_ok(dentry->d_inode, iattr); + if (retval) + return retval; + + p9attr.valid = iattr->ia_valid; + p9attr.mode = iattr->ia_mode; + p9attr.uid = iattr->ia_uid; + p9attr.gid = iattr->ia_gid; + p9attr.size = iattr->ia_size; + p9attr.atime_sec = iattr->ia_atime.tv_sec; + p9attr.atime_nsec = iattr->ia_atime.tv_nsec; + p9attr.mtime_sec = iattr->ia_mtime.tv_sec; + p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec; + + retval = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + retval = p9_client_setattr(fid, &p9attr); + if (retval < 0) + return retval; + + if ((iattr->ia_valid & ATTR_SIZE) && + iattr->ia_size != i_size_read(dentry->d_inode)) { + retval = vmtruncate(dentry->d_inode, iattr->ia_size); + if (retval) + return retval; + } + + setattr_copy(dentry->d_inode, iattr); + mark_inode_dirty(dentry->d_inode); + if (iattr->ia_valid & ATTR_MODE) { + /* We also want to update ACL when we update mode bits */ + retval = v9fs_acl_chmod(dentry); + if (retval < 0) + return retval; + } + return 0; +} + +/** + * v9fs_stat2inode_dotl - populate an inode structure with stat info + * @stat: stat structure + * @inode: inode to populate + * @sb: superblock of filesystem + * + */ + +void +v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) +{ + + if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { + inode->i_atime.tv_sec = stat->st_atime_sec; + inode->i_atime.tv_nsec = stat->st_atime_nsec; + inode->i_mtime.tv_sec = stat->st_mtime_sec; + inode->i_mtime.tv_nsec = stat->st_mtime_nsec; + inode->i_ctime.tv_sec = stat->st_ctime_sec; + inode->i_ctime.tv_nsec = stat->st_ctime_nsec; + inode->i_uid = stat->st_uid; + inode->i_gid = stat->st_gid; + inode->i_nlink = stat->st_nlink; + inode->i_mode = stat->st_mode; + inode->i_rdev = new_decode_dev(stat->st_rdev); + + if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) + init_special_inode(inode, inode->i_mode, inode->i_rdev); + + i_size_write(inode, stat->st_size); + inode->i_blocks = stat->st_blocks; + } else { + if (stat->st_result_mask & P9_STATS_ATIME) { + inode->i_atime.tv_sec = stat->st_atime_sec; + inode->i_atime.tv_nsec = stat->st_atime_nsec; + } + if (stat->st_result_mask & P9_STATS_MTIME) { + inode->i_mtime.tv_sec = stat->st_mtime_sec; + inode->i_mtime.tv_nsec = stat->st_mtime_nsec; + } + if (stat->st_result_mask & P9_STATS_CTIME) { + inode->i_ctime.tv_sec = stat->st_ctime_sec; + inode->i_ctime.tv_nsec = stat->st_ctime_nsec; + } + if (stat->st_result_mask & P9_STATS_UID) + inode->i_uid = stat->st_uid; + if (stat->st_result_mask & P9_STATS_GID) + inode->i_gid = stat->st_gid; + if (stat->st_result_mask & P9_STATS_NLINK) + inode->i_nlink = stat->st_nlink; + if (stat->st_result_mask & P9_STATS_MODE) { + inode->i_mode = stat->st_mode; + if ((S_ISBLK(inode->i_mode)) || + (S_ISCHR(inode->i_mode))) + init_special_inode(inode, inode->i_mode, + inode->i_rdev); + } + if (stat->st_result_mask & P9_STATS_RDEV) + inode->i_rdev = new_decode_dev(stat->st_rdev); + if (stat->st_result_mask & P9_STATS_SIZE) + i_size_write(inode, stat->st_size); + if (stat->st_result_mask & P9_STATS_BLOCKS) + inode->i_blocks = stat->st_blocks; + } + if (stat->st_result_mask & P9_STATS_GEN) + inode->i_generation = stat->st_gen; + + /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION + * because the inode structure does not have fields for them. + */ +} + +static int +v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, + const char *symname) +{ + struct v9fs_session_info *v9ses; + struct p9_fid *dfid; + struct p9_fid *fid = NULL; + struct inode *inode; + struct p9_qid qid; + char *name; + int err; + gid_t gid; + + name = (char *) dentry->d_name.name; + P9_DPRINTK(P9_DEBUG_VFS, "v9fs_vfs_symlink_dotl : %lu,%s,%s\n", + dir->i_ino, name, symname); + v9ses = v9fs_inode2v9ses(dir); + + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + return err; + } + + gid = v9fs_get_fsgid_for_create(dir); + + /* Server doesn't alter fid on TSYMLINK. Hence no need to clone it. */ + err = p9_client_symlink(dfid, name, (char *)symname, gid, &qid); + + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_symlink failed %d\n", err); + goto error; + } + + if (v9ses->cache) { + /* Now walk from the parent so we can get an unopened fid. */ + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + /* instantiate inode and assign the unopened fid to dentry */ + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* Not in cached mode. No need to populate inode with stat */ + inode = v9fs_get_inode(dir->i_sb, S_IFLNK); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_instantiate(dentry, inode); + } + +error: + if (fid) + p9_client_clunk(fid); + + return err; +} + +/** + * v9fs_vfs_link_dotl - create a hardlink for dotl + * @old_dentry: dentry for file to link to + * @dir: inode destination for new link + * @dentry: dentry for link + * + */ + +static int +v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) +{ + int err; + struct p9_fid *dfid, *oldfid; + char *name; + struct v9fs_session_info *v9ses; + struct dentry *dir_dentry; + + P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n", + dir->i_ino, old_dentry->d_name.name, + dentry->d_name.name); + + v9ses = v9fs_inode2v9ses(dir); + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) + return PTR_ERR(dfid); + + oldfid = v9fs_fid_lookup(old_dentry); + if (IS_ERR(oldfid)) + return PTR_ERR(oldfid); + + name = (char *) dentry->d_name.name; + + err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name); + + if (err < 0) { + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err); + return err; + } + + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + /* Get the latest stat info from server. */ + struct p9_fid *fid; + struct p9_stat_dotl *st; + + fid = v9fs_fid_lookup(old_dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); + if (IS_ERR(st)) + return PTR_ERR(st); + + v9fs_stat2inode_dotl(st, old_dentry->d_inode); + + kfree(st); + } else { + /* Caching disabled. No need to get upto date stat info. + * This dentry will be released immediately. So, just hold the + * inode + */ + ihold(old_dentry->d_inode); + } + d_instantiate(dentry, old_dentry->d_inode); + + return err; +} + +/** + * v9fs_vfs_mknod_dotl - create a special file + * @dir: inode destination for new link + * @dentry: dentry for file + * @mode: mode for creation + * @rdev: device associated with special file + * + */ +static int +v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, + dev_t rdev) +{ + int err; + char *name; + mode_t mode; + struct v9fs_session_info *v9ses; + struct p9_fid *fid = NULL, *dfid = NULL; + struct inode *inode; + gid_t gid; + struct p9_qid qid; + struct dentry *dir_dentry; + struct posix_acl *dacl = NULL, *pacl = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, + " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, + dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); + + if (!new_valid_dev(rdev)) + return -EINVAL; + + v9ses = v9fs_inode2v9ses(dir); + dir_dentry = v9fs_dentry_from_dir_inode(dir); + dfid = v9fs_fid_lookup(dir_dentry); + if (IS_ERR(dfid)) { + err = PTR_ERR(dfid); + P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err); + dfid = NULL; + goto error; + } + + gid = v9fs_get_fsgid_for_create(dir); + mode = omode; + /* Update mode based on ACL value */ + err = v9fs_acl_mode(dir, &mode, &dacl, &pacl); + if (err) { + P9_DPRINTK(P9_DEBUG_VFS, + "Failed to get acl values in mknod %d\n", err); + goto error; + } + name = (char *) dentry->d_name.name; + + err = p9_client_mknod_dotl(dfid, name, mode, rdev, gid, &qid); + if (err < 0) + goto error; + + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) { + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n", + err); + fid = NULL; + goto error; + } + + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", + err); + goto error; + } + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + fid = NULL; + } else { + /* + * Not in cached mode. No need to populate inode with stat. + * socket syscall returns a fd, so we need instantiate + */ + inode = v9fs_get_inode(dir->i_sb, mode); + if (IS_ERR(inode)) { + err = PTR_ERR(inode); + goto error; + } + d_instantiate(dentry, inode); + } + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); +error: + if (fid) + p9_client_clunk(fid); + return err; +} + +/** + * v9fs_vfs_follow_link_dotl - follow a symlink path + * @dentry: dentry for symlink + * @nd: nameidata + * + */ + +static void * +v9fs_vfs_follow_link_dotl(struct dentry *dentry, struct nameidata *nd) +{ + int retval; + struct p9_fid *fid; + char *link = __getname(); + char *target; + + P9_DPRINTK(P9_DEBUG_VFS, "%s\n", dentry->d_name.name); + + if (!link) { + link = ERR_PTR(-ENOMEM); + goto ndset; + } + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) { + __putname(link); + link = ERR_PTR(PTR_ERR(fid)); + goto ndset; + } + retval = p9_client_readlink(fid, &target); + if (!retval) { + strcpy(link, target); + kfree(target); + goto ndset; + } + __putname(link); + link = ERR_PTR(retval); +ndset: + nd_set_link(nd, link); + return NULL; +} + +const struct inode_operations v9fs_dir_inode_operations_dotl = { + .create = v9fs_vfs_create_dotl, + .lookup = v9fs_vfs_lookup, + .link = v9fs_vfs_link_dotl, + .symlink = v9fs_vfs_symlink_dotl, + .unlink = v9fs_vfs_unlink, + .mkdir = v9fs_vfs_mkdir_dotl, + .rmdir = v9fs_vfs_rmdir, + .mknod = v9fs_vfs_mknod_dotl, + .rename = v9fs_vfs_rename, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, + .check_acl = v9fs_check_acl, +}; + +const struct inode_operations v9fs_file_inode_operations_dotl = { + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, + .check_acl = v9fs_check_acl, +}; + +const struct inode_operations v9fs_symlink_inode_operations_dotl = { + .readlink = generic_readlink, + .follow_link = v9fs_vfs_follow_link_dotl, + .put_link = v9fs_vfs_put_link, + .getattr = v9fs_vfs_getattr_dotl, + .setattr = v9fs_vfs_setattr_dotl, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .removexattr = generic_removexattr, + .listxattr = v9fs_listxattr, +}; diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 1d12ba0..c55c614 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -39,6 +39,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/statfs.h> +#include <linux/magic.h> #include <net/9p/9p.h> #include <net/9p/client.h> @@ -46,6 +47,7 @@ #include "v9fs_vfs.h" #include "fid.h" #include "xattr.h" +#include "acl.h" static const struct super_operations v9fs_super_ops, v9fs_super_ops_dotl; @@ -66,7 +68,7 @@ static int v9fs_set_super(struct super_block *s, void *data) * v9fs_fill_super - populate superblock with info * @sb: superblock * @v9ses: session information - * @flags: flags propagated from v9fs_get_sb() + * @flags: flags propagated from v9fs_mount() * */ @@ -88,22 +90,25 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC | MS_NOATIME; +#ifdef CONFIG_9P_FS_POSIX_ACL + if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT) + sb->s_flags |= MS_POSIXACL; +#endif + save_mount_options(sb, data); } /** - * v9fs_get_sb - mount a superblock + * v9fs_mount - mount a superblock * @fs_type: file system type * @flags: mount flags * @dev_name: device name that was mounted * @data: mount options - * @mnt: mountpoint record to be instantiated * */ -static int v9fs_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { struct super_block *sb = NULL; struct inode *inode = NULL; @@ -117,7 +122,7 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL); if (!v9ses) - return -ENOMEM; + return ERR_PTR(-ENOMEM); fid = v9fs_session_init(v9ses, dev_name, data); if (IS_ERR(fid)) { @@ -149,7 +154,6 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, goto release_sb; } sb->s_root = root; - if (v9fs_proto_dotl(v9ses)) { struct p9_stat_dotl *st = NULL; st = p9_client_getattr_dotl(fid, P9_STATS_BASIC); @@ -174,19 +178,21 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, p9stat_free(st); kfree(st); } - + retval = v9fs_get_acl(inode, fid); + if (retval) + goto release_sb; v9fs_fid_add(root, fid); P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n"); - simple_set_mnt(mnt, sb); - return 0; + return dget(sb->s_root); clunk_fid: p9_client_clunk(fid); close_session: v9fs_session_close(v9ses); kfree(v9ses); - return retval; + return ERR_PTR(retval); + release_sb: /* * we will do the session_close and root dentry release @@ -196,7 +202,7 @@ release_sb: */ p9_client_clunk(fid); deactivate_locked_super(sb); - return retval; + return ERR_PTR(retval); } /** @@ -249,7 +255,7 @@ static int v9fs_statfs(struct dentry *dentry, struct kstatfs *buf) if (v9fs_proto_dotl(v9ses)) { res = p9_client_statfs(fid, &rs); if (res == 0) { - buf->f_type = rs.type; + buf->f_type = V9FS_MAGIC; buf->f_bsize = rs.bsize; buf->f_blocks = rs.blocks; buf->f_bfree = rs.bfree; @@ -292,7 +298,7 @@ static const struct super_operations v9fs_super_ops_dotl = { struct file_system_type v9fs_fs_type = { .name = "9p", - .get_sb = v9fs_get_sb, + .mount = v9fs_mount, .kill_sb = v9fs_kill_super, .owner = THIS_MODULE, .fs_flags = FS_RENAME_DOES_D_MOVE, diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c index f88e5c2..d288773 100644 --- a/fs/9p/xattr.c +++ b/fs/9p/xattr.c @@ -21,30 +21,13 @@ #include "fid.h" #include "xattr.h" -/* - * v9fs_xattr_get() - * - * Copy an extended attribute into the buffer - * provided, or compute the buffer size required. - * Buffer is NULL to compute the size of the buffer required. - * - * Returns a negative error number on failure, or the number of bytes - * used / required on success. - */ -ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name, - void *buffer, size_t buffer_size) +ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name, + void *buffer, size_t buffer_size) { ssize_t retval; int msize, read_count; u64 offset = 0, attr_size; - struct p9_fid *fid, *attr_fid; - - P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu\n", - __func__, name, buffer_size); - - fid = v9fs_fid_lookup(dentry); - if (IS_ERR(fid)) - return PTR_ERR(fid); + struct p9_fid *attr_fid; attr_fid = p9_client_xattrwalk(fid, name, &attr_size); if (IS_ERR(attr_fid)) { @@ -88,6 +71,31 @@ error: } + +/* + * v9fs_xattr_get() + * + * Copy an extended attribute into the buffer + * provided, or compute the buffer size required. + * Buffer is NULL to compute the size of the buffer required. + * + * Returns a negative error number on failure, or the number of bytes + * used / required on success. + */ +ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name, + void *buffer, size_t buffer_size) +{ + struct p9_fid *fid; + + P9_DPRINTK(P9_DEBUG_VFS, "%s: name = %s value_len = %zu\n", + __func__, name, buffer_size); + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + return v9fs_fid_xattr_get(fid, name, buffer, buffer_size); +} + /* * v9fs_xattr_set() * @@ -125,7 +133,7 @@ int v9fs_xattr_set(struct dentry *dentry, const char *name, "p9_client_xattrcreate failed %d\n", retval); goto error; } - msize = fid->clnt->msize;; + msize = fid->clnt->msize; while (value_len) { if (value_len > (msize - P9_IOHDRSZ)) write_count = msize - P9_IOHDRSZ; @@ -156,5 +164,9 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) const struct xattr_handler *v9fs_xattr_handlers[] = { &v9fs_xattr_user_handler, +#ifdef CONFIG_9P_FS_POSIX_ACL + &v9fs_xattr_acl_access_handler, + &v9fs_xattr_acl_default_handler, +#endif NULL }; diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h index 9ddf672..eaa837c 100644 --- a/fs/9p/xattr.h +++ b/fs/9p/xattr.h @@ -15,10 +15,16 @@ #define FS_9P_XATTR_H #include <linux/xattr.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> extern const struct xattr_handler *v9fs_xattr_handlers[]; extern struct xattr_handler v9fs_xattr_user_handler; +extern const struct xattr_handler v9fs_xattr_acl_access_handler; +extern const struct xattr_handler v9fs_xattr_acl_default_handler; +extern ssize_t v9fs_fid_xattr_get(struct p9_fid *, const char *, + void *, size_t); extern ssize_t v9fs_xattr_get(struct dentry *, const char *, void *, size_t); extern int v9fs_xattr_set(struct dentry *, const char *, @@ -62,7 +62,6 @@ source "fs/notify/Kconfig" source "fs/quota/Kconfig" -source "fs/autofs/Kconfig" source "fs/autofs4/Kconfig" source "fs/fuse/Kconfig" @@ -234,7 +233,6 @@ config NFS_COMMON default y source "net/sunrpc/Kconfig" -source "fs/smbfs/Kconfig" source "fs/ceph/Kconfig" source "fs/cifs/Kconfig" source "fs/ncpfs/Kconfig" diff --git a/fs/Makefile b/fs/Makefile index 26956fc..a7f7cef 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -88,7 +88,6 @@ obj-$(CONFIG_NFSD) += nfsd/ obj-$(CONFIG_LOCKD) += lockd/ obj-$(CONFIG_NLS) += nls/ obj-$(CONFIG_SYSV_FS) += sysv/ -obj-$(CONFIG_SMB_FS) += smbfs/ obj-$(CONFIG_CIFS) += cifs/ obj-$(CONFIG_NCP_FS) += ncpfs/ obj-$(CONFIG_HPFS_FS) += hpfs/ @@ -101,7 +100,6 @@ obj-$(CONFIG_UBIFS_FS) += ubifs/ obj-$(CONFIG_AFFS_FS) += affs/ obj-$(CONFIG_ROMFS_FS) += romfs/ obj-$(CONFIG_QNX4FS_FS) += qnx4/ -obj-$(CONFIG_AUTOFS_FS) += autofs/ obj-$(CONFIG_AUTOFS4_FS) += autofs4/ obj-$(CONFIG_ADFS_FS) += adfs/ obj-$(CONFIG_FUSE_FS) += fuse/ diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c index f4287e4..bf7693c 100644 --- a/fs/adfs/dir.c +++ b/fs/adfs/dir.c @@ -201,7 +201,8 @@ const struct file_operations adfs_dir_operations = { }; static int -adfs_hash(struct dentry *parent, struct qstr *qstr) +adfs_hash(const struct dentry *parent, const struct inode *inode, + struct qstr *qstr) { const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen; const unsigned char *name; @@ -237,17 +238,19 @@ adfs_hash(struct dentry *parent, struct qstr *qstr) * requirements of the underlying filesystem. */ static int -adfs_compare(struct dentry *parent, struct qstr *entry, struct qstr *name) +adfs_compare(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { int i; - if (entry->len != name->len) + if (len != name->len) return 1; for (i = 0; i < name->len; i++) { char a, b; - a = entry->name[i]; + a = str[i]; b = name->name[i]; if (a >= 'A' && a <= 'Z') @@ -273,7 +276,7 @@ adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) struct object_info obj; int error; - dentry->d_op = &adfs_dentry_operations; + d_set_d_op(dentry, &adfs_dentry_operations); lock_kernel(); error = adfs_dir_lookup_byname(dir, &dentry->d_name, &obj); if (error == 0) { diff --git a/fs/adfs/super.c b/fs/adfs/super.c index d9803f7..a4041b5 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -240,11 +240,18 @@ static struct inode *adfs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void adfs_destroy_inode(struct inode *inode) +static void adfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(adfs_inode_cachep, ADFS_I(inode)); } +static void adfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, adfs_i_callback); +} + static void init_once(void *foo) { struct adfs_inode_info *ei = (struct adfs_inode_info *) foo; @@ -477,7 +484,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) adfs_error(sb, "get root inode failed\n"); goto error; } else - sb->s_root->d_op = &adfs_dentry_operations; + d_set_d_op(sb->s_root, &adfs_dentry_operations); unlock_kernel(); return 0; @@ -490,17 +497,16 @@ error: return -EINVAL; } -static int adfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *adfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, adfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, adfs_fill_super); } static struct file_system_type adfs_fs_type = { .owner = THIS_MODULE, .name = "adfs", - .get_sb = adfs_get_sb, + .mount = adfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c index 7d0f0a3..3a4557e 100644 --- a/fs/affs/amigaffs.c +++ b/fs/affs/amigaffs.c @@ -128,7 +128,7 @@ affs_fix_dcache(struct dentry *dentry, u32 entry_ino) void *data = dentry->d_fsdata; struct list_head *head, *next; - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); head = &inode->i_dentry; next = head->next; while (next != head) { @@ -139,7 +139,7 @@ affs_fix_dcache(struct dentry *dentry, u32 entry_ino) } next = next->next; } - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); } diff --git a/fs/affs/namei.c b/fs/affs/namei.c index 914d1c0..944a404 100644 --- a/fs/affs/namei.c +++ b/fs/affs/namei.c @@ -13,11 +13,19 @@ typedef int (*toupper_t)(int); static int affs_toupper(int ch); -static int affs_hash_dentry(struct dentry *, struct qstr *); -static int affs_compare_dentry(struct dentry *, struct qstr *, struct qstr *); +static int affs_hash_dentry(const struct dentry *, + const struct inode *, struct qstr *); +static int affs_compare_dentry(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); static int affs_intl_toupper(int ch); -static int affs_intl_hash_dentry(struct dentry *, struct qstr *); -static int affs_intl_compare_dentry(struct dentry *, struct qstr *, struct qstr *); +static int affs_intl_hash_dentry(const struct dentry *, + const struct inode *, struct qstr *); +static int affs_intl_compare_dentry(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); const struct dentry_operations affs_dentry_operations = { .d_hash = affs_hash_dentry, @@ -58,13 +66,13 @@ affs_get_toupper(struct super_block *sb) * Note: the dentry argument is the parent dentry. */ static inline int -__affs_hash_dentry(struct dentry *dentry, struct qstr *qstr, toupper_t toupper) +__affs_hash_dentry(struct qstr *qstr, toupper_t toupper) { const u8 *name = qstr->name; unsigned long hash; int i; - i = affs_check_name(qstr->name,qstr->len); + i = affs_check_name(qstr->name, qstr->len); if (i) return i; @@ -78,39 +86,41 @@ __affs_hash_dentry(struct dentry *dentry, struct qstr *qstr, toupper_t toupper) } static int -affs_hash_dentry(struct dentry *dentry, struct qstr *qstr) +affs_hash_dentry(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { - return __affs_hash_dentry(dentry, qstr, affs_toupper); + return __affs_hash_dentry(qstr, affs_toupper); } static int -affs_intl_hash_dentry(struct dentry *dentry, struct qstr *qstr) +affs_intl_hash_dentry(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { - return __affs_hash_dentry(dentry, qstr, affs_intl_toupper); + return __affs_hash_dentry(qstr, affs_intl_toupper); } -static inline int -__affs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b, toupper_t toupper) +static inline int __affs_compare_dentry(unsigned int len, + const char *str, const struct qstr *name, toupper_t toupper) { - const u8 *aname = a->name; - const u8 *bname = b->name; - int len; + const u8 *aname = str; + const u8 *bname = name->name; - /* 'a' is the qstr of an already existing dentry, so the name - * must be valid. 'b' must be validated first. + /* + * 'str' is the name of an already existing dentry, so the name + * must be valid. 'name' must be validated first. */ - if (affs_check_name(b->name,b->len)) + if (affs_check_name(name->name, name->len)) return 1; - /* If the names are longer than the allowed 30 chars, + /* + * If the names are longer than the allowed 30 chars, * the excess is ignored, so their length may differ. */ - len = a->len; if (len >= 30) { - if (b->len < 30) + if (name->len < 30) return 1; len = 30; - } else if (len != b->len) + } else if (len != name->len) return 1; for (; len > 0; len--) @@ -121,14 +131,18 @@ __affs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b, tou } static int -affs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) +affs_compare_dentry(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - return __affs_compare_dentry(dentry, a, b, affs_toupper); + return __affs_compare_dentry(len, str, name, affs_toupper); } static int -affs_intl_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) +affs_intl_compare_dentry(const struct dentry *parent,const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - return __affs_compare_dentry(dentry, a, b, affs_intl_toupper); + return __affs_compare_dentry(len, str, name, affs_intl_toupper); } /* @@ -226,7 +240,7 @@ affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) if (IS_ERR(inode)) return ERR_CAST(inode); } - dentry->d_op = AFFS_SB(sb)->s_flags & SF_INTL ? &affs_intl_dentry_operations : &affs_dentry_operations; + d_set_d_op(dentry, AFFS_SB(sb)->s_flags & SF_INTL ? &affs_intl_dentry_operations : &affs_dentry_operations); d_add(dentry, inode); return NULL; } diff --git a/fs/affs/super.c b/fs/affs/super.c index fa4fbe1..d39081b 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -95,11 +95,18 @@ static struct inode *affs_alloc_inode(struct super_block *sb) return &i->vfs_inode; } -static void affs_destroy_inode(struct inode *inode) +static void affs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(affs_inode_cachep, AFFS_I(inode)); } +static void affs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, affs_i_callback); +} + static void init_once(void *foo) { struct affs_inode_info *ei = (struct affs_inode_info *) foo; @@ -475,7 +482,7 @@ got_root: printk(KERN_ERR "AFFS: Get root inode failed\n"); goto out_error; } - sb->s_root->d_op = &affs_dentry_operations; + d_set_d_op(sb->s_root, &affs_dentry_operations); pr_debug("AFFS: s_flags=%lX\n",sb->s_flags); return 0; @@ -573,17 +580,16 @@ affs_statfs(struct dentry *dentry, struct kstatfs *buf) return 0; } -static int affs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *affs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, affs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, affs_fill_super); } static struct file_system_type affs_fs_type = { .owner = THIS_MODULE, .name = "affs", - .get_sb = affs_get_sb, + .mount = affs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/afs/dir.c b/fs/afs/dir.c index 5439e1b..34a3263 100644 --- a/fs/afs/dir.c +++ b/fs/afs/dir.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/fs.h> +#include <linux/namei.h> #include <linux/pagemap.h> #include <linux/ctype.h> #include <linux/sched.h> @@ -23,7 +24,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, static int afs_dir_open(struct inode *inode, struct file *file); static int afs_readdir(struct file *file, void *dirent, filldir_t filldir); static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd); -static int afs_d_delete(struct dentry *dentry); +static int afs_d_delete(const struct dentry *dentry); static void afs_d_release(struct dentry *dentry); static int afs_lookup_filldir(void *_cookie, const char *name, int nlen, loff_t fpos, u64 ino, unsigned dtype); @@ -581,7 +582,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry, } success: - dentry->d_op = &afs_fs_dentry_operations; + d_set_d_op(dentry, &afs_fs_dentry_operations); d_add(dentry, inode); _leave(" = 0 { vn=%u u=%u } -> { ino=%lu v=%llu }", @@ -607,6 +608,9 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd) void *dir_version; int ret; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + vnode = AFS_FS_I(dentry->d_inode); if (dentry->d_inode) @@ -730,7 +734,7 @@ out_bad: * - called from dput() when d_count is going to 0. * - return 1 to request dentry be unhashed, 0 otherwise */ -static int afs_d_delete(struct dentry *dentry) +static int afs_d_delete(const struct dentry *dentry) { _enter("%s", dentry->d_name.name); diff --git a/fs/afs/internal.h b/fs/afs/internal.h index cca8eef..6d4bc1c 100644 --- a/fs/afs/internal.h +++ b/fs/afs/internal.h @@ -624,7 +624,7 @@ extern void afs_clear_permits(struct afs_vnode *); extern void afs_cache_permit(struct afs_vnode *, struct key *, long); extern void afs_zap_permits(struct rcu_head *); extern struct key *afs_request_key(struct afs_cell *); -extern int afs_permission(struct inode *, int); +extern int afs_permission(struct inode *, int, unsigned int); /* * server.c diff --git a/fs/afs/security.c b/fs/afs/security.c index bb4ed14..f44b9d3 100644 --- a/fs/afs/security.c +++ b/fs/afs/security.c @@ -285,13 +285,16 @@ static int afs_check_permit(struct afs_vnode *vnode, struct key *key, * - AFS ACLs are attached to directories only, and a file is controlled by its * parent directory's ACL */ -int afs_permission(struct inode *inode, int mask) +int afs_permission(struct inode *inode, int mask, unsigned int flags) { struct afs_vnode *vnode = AFS_FS_I(inode); afs_access_t uninitialized_var(access); struct key *key; int ret; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + _enter("{{%x:%u},%lx},%x,", vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask); @@ -347,7 +350,7 @@ int afs_permission(struct inode *inode, int mask) } key_put(key); - ret = generic_permission(inode, mask, NULL); + ret = generic_permission(inode, mask, flags, NULL); _leave(" = %d", ret); return ret; diff --git a/fs/afs/super.c b/fs/afs/super.c index eacf76d..f901a9d 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -29,9 +29,8 @@ #define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */ static void afs_i_init_once(void *foo); -static int afs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, - void *data, struct vfsmount *mnt); +static struct dentry *afs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data); static struct inode *afs_alloc_inode(struct super_block *sb); static void afs_put_super(struct super_block *sb); static void afs_destroy_inode(struct inode *inode); @@ -40,7 +39,7 @@ static int afs_statfs(struct dentry *dentry, struct kstatfs *buf); struct file_system_type afs_fs_type = { .owner = THIS_MODULE, .name = "afs", - .get_sb = afs_get_sb, + .mount = afs_mount, .kill_sb = kill_anon_super, .fs_flags = 0, }; @@ -359,11 +358,8 @@ error: /* * get an AFS superblock */ -static int afs_get_sb(struct file_system_type *fs_type, - int flags, - const char *dev_name, - void *options, - struct vfsmount *mnt) +static struct dentry *afs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *options) { struct afs_mount_params params; struct super_block *sb; @@ -427,12 +423,11 @@ static int afs_get_sb(struct file_system_type *fs_type, ASSERTCMP(sb->s_flags, &, MS_ACTIVE); } - simple_set_mnt(mnt, sb); afs_put_volume(params.volume); afs_put_cell(params.cell); kfree(new_opts); _leave(" = 0 [%p]", sb); - return 0; + return dget(sb->s_root); error: afs_put_volume(params.volume); @@ -440,7 +435,7 @@ error: key_put(params.key); kfree(new_opts); _leave(" = %d", ret); - return ret; + return ERR_PTR(ret); } /* @@ -503,6 +498,14 @@ static struct inode *afs_alloc_inode(struct super_block *sb) return &vnode->vfs_inode; } +static void afs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct afs_vnode *vnode = AFS_FS_I(inode); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(afs_inode_cachep, vnode); +} + /* * destroy an AFS inode struct */ @@ -516,7 +519,7 @@ static void afs_destroy_inode(struct inode *inode) ASSERTCMP(vnode->server, ==, NULL); - kmem_cache_free(afs_inode_cachep, vnode); + call_rcu(&inode->i_rcu, afs_i_callback); atomic_dec(&afs_count_active_inodes); } @@ -798,29 +798,12 @@ static void aio_queue_work(struct kioctx * ctx) queue_delayed_work(aio_wq, &ctx->wq, timeout); } - -/* - * aio_run_iocbs: - * Process all pending retries queued on the ioctx - * run list. - * Assumes it is operating within the aio issuer's mm - * context. - */ -static inline void aio_run_iocbs(struct kioctx *ctx) -{ - int requeue; - - spin_lock_irq(&ctx->ctx_lock); - - requeue = __aio_run_iocbs(ctx); - spin_unlock_irq(&ctx->ctx_lock); - if (requeue) - aio_queue_work(ctx); -} - /* - * just like aio_run_iocbs, but keeps running them until - * the list stays empty + * aio_run_all_iocbs: + * Process all pending retries queued on the ioctx + * run list, and keep running them until the list + * stays empty. + * Assumes it is operating within the aio issuer's mm context. */ static inline void aio_run_all_iocbs(struct kioctx *ctx) { @@ -1839,7 +1822,7 @@ SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id, long ret = -EINVAL; if (likely(ioctx)) { - if (likely(min_nr <= nr && min_nr >= 0 && nr >= 0)) + if (likely(min_nr <= nr && min_nr >= 0)) ret = read_events(ioctx, min_nr, nr, events, timeout); put_ioctx(ioctx); } diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c index 5365527..98edb65 100644 --- a/fs/anon_inodes.c +++ b/fs/anon_inodes.c @@ -26,12 +26,10 @@ static struct vfsmount *anon_inode_mnt __read_mostly; static struct inode *anon_inode_inode; static const struct file_operations anon_inode_fops; -static int anon_inodefs_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *anon_inodefs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_pseudo(fs_type, "anon_inode:", NULL, ANON_INODE_FS_MAGIC, - mnt); + return mount_pseudo(fs_type, "anon_inode:", NULL, ANON_INODE_FS_MAGIC); } /* @@ -45,7 +43,7 @@ static char *anon_inodefs_dname(struct dentry *dentry, char *buffer, int buflen) static struct file_system_type anon_inode_fs_type = { .name = "anon_inodefs", - .get_sb = anon_inodefs_get_sb, + .mount = anon_inodefs_mount, .kill_sb = kill_anon_super, }; static const struct dentry_operations anon_inodefs_dentry_operations = { @@ -66,9 +64,9 @@ static const struct address_space_operations anon_aops = { }; /** - * anon_inode_getfd - creates a new file instance by hooking it up to an - * anonymous inode, and a dentry that describe the "class" - * of the file + * anon_inode_getfile - creates a new file instance by hooking it up to an + * anonymous inode, and a dentry that describe the "class" + * of the file * * @name: [in] name of the "class" of the new file * @fops: [in] file operations for the new file @@ -104,7 +102,7 @@ struct file *anon_inode_getfile(const char *name, this.name = name; this.len = strlen(name); this.hash = 0; - path.dentry = d_alloc(anon_inode_mnt->mnt_sb->s_root, &this); + path.dentry = d_alloc_pseudo(anon_inode_mnt->mnt_sb, &this); if (!path.dentry) goto err_module; @@ -115,7 +113,7 @@ struct file *anon_inode_getfile(const char *name, */ ihold(anon_inode_inode); - path.dentry->d_op = &anon_inodefs_dentry_operations; + d_set_d_op(path.dentry, &anon_inodefs_dentry_operations); d_instantiate(path.dentry, anon_inode_inode); error = -ENFILE; @@ -234,7 +232,7 @@ static int __init anon_inode_init(void) return 0; err_mntput: - mntput(anon_inode_mnt); + mntput_long(anon_inode_mnt); err_unregister_filesystem: unregister_filesystem(&anon_inode_fs_type); err_exit: diff --git a/fs/autofs/Kconfig b/fs/autofs/Kconfig deleted file mode 100644 index 480e210..0000000 --- a/fs/autofs/Kconfig +++ /dev/null @@ -1,22 +0,0 @@ -config AUTOFS_FS - tristate "Kernel automounter support" - depends on BKL # unfixable, just use autofs4 - help - The automounter is a tool to automatically mount remote file systems - on demand. This implementation is partially kernel-based to reduce - overhead in the already-mounted case; this is unlike the BSD - automounter (amd), which is a pure user space daemon. - - To use the automounter you need the user-space tools from the autofs - package; you can find the location in <file:Documentation/Changes>. - You also want to answer Y to "NFS file system support", below. - - If you want to use the newer version of the automounter with more - features, say N here and say Y to "Kernel automounter v4 support", - below. - - To compile this support as a module, choose M here: the module will be - called autofs. - - If you are not a part of a fairly large, distributed network, you - probably do not need an automounter, and can say N here. diff --git a/fs/autofs/Makefile b/fs/autofs/Makefile deleted file mode 100644 index 453a60f..0000000 --- a/fs/autofs/Makefile +++ /dev/null @@ -1,7 +0,0 @@ -# -# Makefile for the linux autofs-filesystem routines. -# - -obj-$(CONFIG_AUTOFS_FS) += autofs.o - -autofs-objs := dirhash.o init.o inode.o root.o symlink.o waitq.o diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h deleted file mode 100644 index 901a3e6..0000000 --- a/fs/autofs/autofs_i.h +++ /dev/null @@ -1,165 +0,0 @@ -/* -*- linux-c -*- ------------------------------------------------------- * - * - * linux/fs/autofs/autofs_i.h - * - * Copyright 1997-1998 Transmeta Corporation - All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ----------------------------------------------------------------------- */ - -/* Internal header file for autofs */ - -#include <linux/auto_fs.h> - -/* This is the range of ioctl() numbers we claim as ours */ -#define AUTOFS_IOC_FIRST AUTOFS_IOC_READY -#define AUTOFS_IOC_COUNT 32 - -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/time.h> -#include <linux/string.h> -#include <linux/wait.h> -#include <linux/dcache.h> -#include <linux/namei.h> -#include <linux/mount.h> -#include <linux/sched.h> - -#include <asm/current.h> -#include <asm/uaccess.h> - -#ifdef DEBUG -#define DPRINTK(D) (printk D) -#else -#define DPRINTK(D) ((void)0) -#endif - -/* - * If the daemon returns a negative response (AUTOFS_IOC_FAIL) then the - * kernel will keep the negative response cached for up to the time given - * here, although the time can be shorter if the kernel throws the dcache - * entry away. This probably should be settable from user space. - */ -#define AUTOFS_NEGATIVE_TIMEOUT (60*HZ) /* 1 minute */ - -/* Structures associated with the root directory hash table */ - -#define AUTOFS_HASH_SIZE 67 - -struct autofs_dir_ent { - int hash; - char *name; - int len; - ino_t ino; - struct dentry *dentry; - /* Linked list of entries */ - struct autofs_dir_ent *next; - struct autofs_dir_ent **back; - /* The following entries are for the expiry system */ - unsigned long last_usage; - struct list_head exp; -}; - -struct autofs_dirhash { - struct autofs_dir_ent *h[AUTOFS_HASH_SIZE]; - struct list_head expiry_head; -}; - -struct autofs_wait_queue { - wait_queue_head_t queue; - struct autofs_wait_queue *next; - autofs_wqt_t wait_queue_token; - /* We use the following to see what we are waiting for */ - int hash; - int len; - char *name; - /* This is for status reporting upon return */ - int status; - int wait_ctr; -}; - -struct autofs_symlink { - char *data; - int len; - time_t mtime; -}; - -#define AUTOFS_MAX_SYMLINKS 256 - -#define AUTOFS_ROOT_INO 1 -#define AUTOFS_FIRST_SYMLINK 2 -#define AUTOFS_FIRST_DIR_INO (AUTOFS_FIRST_SYMLINK+AUTOFS_MAX_SYMLINKS) - -#define AUTOFS_SYMLINK_BITMAP_LEN \ - ((AUTOFS_MAX_SYMLINKS+((sizeof(long)*1)-1))/(sizeof(long)*8)) - -#define AUTOFS_SBI_MAGIC 0x6d4a556d - -struct autofs_sb_info { - u32 magic; - struct file *pipe; - struct pid *oz_pgrp; - int catatonic; - struct super_block *sb; - unsigned long exp_timeout; - ino_t next_dir_ino; - struct autofs_wait_queue *queues; /* Wait queue pointer */ - struct autofs_dirhash dirhash; /* Root directory hash */ - struct autofs_symlink symlink[AUTOFS_MAX_SYMLINKS]; - unsigned long symlink_bitmap[AUTOFS_SYMLINK_BITMAP_LEN]; -}; - -static inline struct autofs_sb_info *autofs_sbi(struct super_block *sb) -{ - return (struct autofs_sb_info *)(sb->s_fs_info); -} - -/* autofs_oz_mode(): do we see the man behind the curtain? (The - processes which do manipulations for us in user space sees the raw - filesystem without "magic".) */ - -static inline int autofs_oz_mode(struct autofs_sb_info *sbi) { - return sbi->catatonic || task_pgrp(current) == sbi->oz_pgrp; -} - -/* Hash operations */ - -void autofs_initialize_hash(struct autofs_dirhash *); -struct autofs_dir_ent *autofs_hash_lookup(const struct autofs_dirhash *,struct qstr *); -void autofs_hash_insert(struct autofs_dirhash *,struct autofs_dir_ent *); -void autofs_hash_delete(struct autofs_dir_ent *); -struct autofs_dir_ent *autofs_hash_enum(const struct autofs_dirhash *,off_t *,struct autofs_dir_ent *); -void autofs_hash_dputall(struct autofs_dirhash *); -void autofs_hash_nuke(struct autofs_sb_info *); - -/* Expiration-handling functions */ - -void autofs_update_usage(struct autofs_dirhash *,struct autofs_dir_ent *); -struct autofs_dir_ent *autofs_expire(struct super_block *,struct autofs_sb_info *, struct vfsmount *mnt); - -/* Operations structures */ - -extern const struct inode_operations autofs_root_inode_operations; -extern const struct inode_operations autofs_symlink_inode_operations; -extern const struct file_operations autofs_root_operations; - -/* Initializing function */ - -int autofs_fill_super(struct super_block *, void *, int); -void autofs_kill_sb(struct super_block *sb); -struct inode *autofs_iget(struct super_block *, unsigned long); - -/* Queue management functions */ - -int autofs_wait(struct autofs_sb_info *,struct qstr *); -int autofs_wait_release(struct autofs_sb_info *,autofs_wqt_t,int); -void autofs_catatonic_mode(struct autofs_sb_info *); - -#ifdef DEBUG -void autofs_say(const char *name, int len); -#else -#define autofs_say(n,l) ((void)0) -#endif diff --git a/fs/autofs/dirhash.c b/fs/autofs/dirhash.c deleted file mode 100644 index e947915..0000000 --- a/fs/autofs/dirhash.c +++ /dev/null @@ -1,250 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * linux/fs/autofs/dirhash.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ - -#include "autofs_i.h" - -/* Functions for maintenance of expiry queue */ - -static void autofs_init_usage(struct autofs_dirhash *dh, - struct autofs_dir_ent *ent) -{ - list_add_tail(&ent->exp, &dh->expiry_head); - ent->last_usage = jiffies; -} - -static void autofs_delete_usage(struct autofs_dir_ent *ent) -{ - list_del(&ent->exp); -} - -void autofs_update_usage(struct autofs_dirhash *dh, - struct autofs_dir_ent *ent) -{ - autofs_delete_usage(ent); /* Unlink from current position */ - autofs_init_usage(dh,ent); /* Relink at queue tail */ -} - -struct autofs_dir_ent *autofs_expire(struct super_block *sb, - struct autofs_sb_info *sbi, - struct vfsmount *mnt) -{ - struct autofs_dirhash *dh = &sbi->dirhash; - struct autofs_dir_ent *ent; - unsigned long timeout = sbi->exp_timeout; - - while (1) { - struct path path; - int umount_ok; - - if ( list_empty(&dh->expiry_head) || sbi->catatonic ) - return NULL; /* No entries */ - /* We keep the list sorted by last_usage and want old stuff */ - ent = list_entry(dh->expiry_head.next, struct autofs_dir_ent, exp); - if (jiffies - ent->last_usage < timeout) - break; - /* Move to end of list in case expiry isn't desirable */ - autofs_update_usage(dh, ent); - - /* Check to see that entry is expirable */ - if ( ent->ino < AUTOFS_FIRST_DIR_INO ) - return ent; /* Symlinks are always expirable */ - - /* Get the dentry for the autofs subdirectory */ - path.dentry = ent->dentry; - - if (!path.dentry) { - /* Should only happen in catatonic mode */ - printk("autofs: dentry == NULL but inode range is directory, entry %s\n", ent->name); - autofs_delete_usage(ent); - continue; - } - - if (!path.dentry->d_inode) { - dput(path.dentry); - printk("autofs: negative dentry on expiry queue: %s\n", - ent->name); - autofs_delete_usage(ent); - continue; - } - - /* Make sure entry is mounted and unused; note that dentry will - point to the mounted-on-top root. */ - if (!S_ISDIR(path.dentry->d_inode->i_mode) || - !d_mountpoint(path.dentry)) { - DPRINTK(("autofs: not expirable (not a mounted directory): %s\n", ent->name)); - continue; - } - path.mnt = mnt; - path_get(&path); - if (!follow_down(&path)) { - path_put(&path); - DPRINTK(("autofs: not expirable (not a mounted directory): %s\n", ent->name)); - continue; - } - while (d_mountpoint(path.dentry) && follow_down(&path)) - ; - umount_ok = may_umount(path.mnt); - path_put(&path); - - if (umount_ok) { - DPRINTK(("autofs: signaling expire on %s\n", ent->name)); - return ent; /* Expirable! */ - } - DPRINTK(("autofs: didn't expire due to may_umount: %s\n", ent->name)); - } - return NULL; /* No expirable entries */ -} - -void autofs_initialize_hash(struct autofs_dirhash *dh) { - memset(&dh->h, 0, AUTOFS_HASH_SIZE*sizeof(struct autofs_dir_ent *)); - INIT_LIST_HEAD(&dh->expiry_head); -} - -struct autofs_dir_ent *autofs_hash_lookup(const struct autofs_dirhash *dh, struct qstr *name) -{ - struct autofs_dir_ent *dhn; - - DPRINTK(("autofs_hash_lookup: hash = 0x%08x, name = ", name->hash)); - autofs_say(name->name,name->len); - - for ( dhn = dh->h[(unsigned) name->hash % AUTOFS_HASH_SIZE] ; dhn ; dhn = dhn->next ) { - if ( name->hash == dhn->hash && - name->len == dhn->len && - !memcmp(name->name, dhn->name, name->len) ) - break; - } - - return dhn; -} - -void autofs_hash_insert(struct autofs_dirhash *dh, struct autofs_dir_ent *ent) -{ - struct autofs_dir_ent **dhnp; - - DPRINTK(("autofs_hash_insert: hash = 0x%08x, name = ", ent->hash)); - autofs_say(ent->name,ent->len); - - autofs_init_usage(dh,ent); - if (ent->dentry) - dget(ent->dentry); - - dhnp = &dh->h[(unsigned) ent->hash % AUTOFS_HASH_SIZE]; - ent->next = *dhnp; - ent->back = dhnp; - *dhnp = ent; - if ( ent->next ) - ent->next->back = &(ent->next); -} - -void autofs_hash_delete(struct autofs_dir_ent *ent) -{ - *(ent->back) = ent->next; - if ( ent->next ) - ent->next->back = ent->back; - - autofs_delete_usage(ent); - - if ( ent->dentry ) - dput(ent->dentry); - kfree(ent->name); - kfree(ent); -} - -/* - * Used by readdir(). We must validate "ptr", so we can't simply make it - * a pointer. Values below 0xffff are reserved; calling with any value - * <= 0x10000 will return the first entry found. - * - * "last" can be NULL or the value returned by the last search *if* we - * want the next sequential entry. - */ -struct autofs_dir_ent *autofs_hash_enum(const struct autofs_dirhash *dh, - off_t *ptr, struct autofs_dir_ent *last) -{ - int bucket, ecount, i; - struct autofs_dir_ent *ent; - - bucket = (*ptr >> 16) - 1; - ecount = *ptr & 0xffff; - - if ( bucket < 0 ) { - bucket = ecount = 0; - } - - DPRINTK(("autofs_hash_enum: bucket %d, entry %d\n", bucket, ecount)); - - ent = last ? last->next : NULL; - - if ( ent ) { - ecount++; - } else { - while ( bucket < AUTOFS_HASH_SIZE ) { - ent = dh->h[bucket]; - for ( i = ecount ; ent && i ; i-- ) - ent = ent->next; - - if (ent) { - ecount++; /* Point to *next* entry */ - break; - } - - bucket++; ecount = 0; - } - } - -#ifdef DEBUG - if ( !ent ) - printk("autofs_hash_enum: nothing found\n"); - else { - printk("autofs_hash_enum: found hash %08x, name", ent->hash); - autofs_say(ent->name,ent->len); - } -#endif - - *ptr = ((bucket+1) << 16) + ecount; - return ent; -} - -/* Iterate over all the ents, and remove all dentry pointers. Used on - entering catatonic mode, in order to make the filesystem unmountable. */ -void autofs_hash_dputall(struct autofs_dirhash *dh) -{ - int i; - struct autofs_dir_ent *ent; - - for ( i = 0 ; i < AUTOFS_HASH_SIZE ; i++ ) { - for ( ent = dh->h[i] ; ent ; ent = ent->next ) { - if ( ent->dentry ) { - dput(ent->dentry); - ent->dentry = NULL; - } - } - } -} - -/* Delete everything. This is used on filesystem destruction, so we - make no attempt to keep the pointers valid */ -void autofs_hash_nuke(struct autofs_sb_info *sbi) -{ - int i; - struct autofs_dir_ent *ent, *nent; - - for ( i = 0 ; i < AUTOFS_HASH_SIZE ; i++ ) { - for ( ent = sbi->dirhash.h[i] ; ent ; ent = nent ) { - nent = ent->next; - if ( ent->dentry ) - dput(ent->dentry); - kfree(ent->name); - kfree(ent); - } - } -} diff --git a/fs/autofs/init.c b/fs/autofs/init.c deleted file mode 100644 index cea5219..0000000 --- a/fs/autofs/init.c +++ /dev/null @@ -1,52 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * linux/fs/autofs/init.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ - -#include <linux/module.h> -#include <linux/init.h> -#include "autofs_i.h" - -static int autofs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) -{ - return get_sb_nodev(fs_type, flags, data, autofs_fill_super, mnt); -} - -static struct file_system_type autofs_fs_type = { - .owner = THIS_MODULE, - .name = "autofs", - .get_sb = autofs_get_sb, - .kill_sb = autofs_kill_sb, -}; - -static int __init init_autofs_fs(void) -{ - return register_filesystem(&autofs_fs_type); -} - -static void __exit exit_autofs_fs(void) -{ - unregister_filesystem(&autofs_fs_type); -} - -module_init(init_autofs_fs); -module_exit(exit_autofs_fs); - -#ifdef DEBUG -void autofs_say(const char *name, int len) -{ - printk("(%d: ", len); - while ( len-- ) - printk("%c", *name++); - printk(")\n"); -} -#endif -MODULE_LICENSE("GPL"); diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c deleted file mode 100644 index e1734f2..0000000 --- a/fs/autofs/inode.c +++ /dev/null @@ -1,288 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * linux/fs/autofs/inode.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ - -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/file.h> -#include <linux/parser.h> -#include <linux/bitops.h> -#include <linux/magic.h> -#include "autofs_i.h" -#include <linux/module.h> - -void autofs_kill_sb(struct super_block *sb) -{ - struct autofs_sb_info *sbi = autofs_sbi(sb); - unsigned int n; - - /* - * In the event of a failure in get_sb_nodev the superblock - * info is not present so nothing else has been setup, so - * just call kill_anon_super when we are called from - * deactivate_super. - */ - if (!sbi) - goto out_kill_sb; - - if (!sbi->catatonic) - autofs_catatonic_mode(sbi); /* Free wait queues, close pipe */ - - put_pid(sbi->oz_pgrp); - - autofs_hash_nuke(sbi); - for (n = 0; n < AUTOFS_MAX_SYMLINKS; n++) { - if (test_bit(n, sbi->symlink_bitmap)) - kfree(sbi->symlink[n].data); - } - - kfree(sb->s_fs_info); - -out_kill_sb: - DPRINTK(("autofs: shutting down\n")); - kill_anon_super(sb); -} - -static const struct super_operations autofs_sops = { - .statfs = simple_statfs, - .show_options = generic_show_options, -}; - -enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto}; - -static const match_table_t autofs_tokens = { - {Opt_fd, "fd=%u"}, - {Opt_uid, "uid=%u"}, - {Opt_gid, "gid=%u"}, - {Opt_pgrp, "pgrp=%u"}, - {Opt_minproto, "minproto=%u"}, - {Opt_maxproto, "maxproto=%u"}, - {Opt_err, NULL} -}; - -static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid, - pid_t *pgrp, int *minproto, int *maxproto) -{ - char *p; - substring_t args[MAX_OPT_ARGS]; - int option; - - *uid = current_uid(); - *gid = current_gid(); - *pgrp = task_pgrp_nr(current); - - *minproto = *maxproto = AUTOFS_PROTO_VERSION; - - *pipefd = -1; - - if (!options) - return 1; - - while ((p = strsep(&options, ",")) != NULL) { - int token; - if (!*p) - continue; - - token = match_token(p, autofs_tokens, args); - switch (token) { - case Opt_fd: - if (match_int(&args[0], &option)) - return 1; - *pipefd = option; - break; - case Opt_uid: - if (match_int(&args[0], &option)) - return 1; - *uid = option; - break; - case Opt_gid: - if (match_int(&args[0], &option)) - return 1; - *gid = option; - break; - case Opt_pgrp: - if (match_int(&args[0], &option)) - return 1; - *pgrp = option; - break; - case Opt_minproto: - if (match_int(&args[0], &option)) - return 1; - *minproto = option; - break; - case Opt_maxproto: - if (match_int(&args[0], &option)) - return 1; - *maxproto = option; - break; - default: - return 1; - } - } - return (*pipefd < 0); -} - -int autofs_fill_super(struct super_block *s, void *data, int silent) -{ - struct inode * root_inode; - struct dentry * root; - struct file * pipe; - int pipefd; - struct autofs_sb_info *sbi; - int minproto, maxproto; - pid_t pgid; - - save_mount_options(s, data); - - sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); - if (!sbi) - goto fail_unlock; - DPRINTK(("autofs: starting up, sbi = %p\n",sbi)); - - s->s_fs_info = sbi; - sbi->magic = AUTOFS_SBI_MAGIC; - sbi->pipe = NULL; - sbi->catatonic = 1; - sbi->exp_timeout = 0; - autofs_initialize_hash(&sbi->dirhash); - sbi->queues = NULL; - memset(sbi->symlink_bitmap, 0, sizeof(long)*AUTOFS_SYMLINK_BITMAP_LEN); - sbi->next_dir_ino = AUTOFS_FIRST_DIR_INO; - s->s_blocksize = 1024; - s->s_blocksize_bits = 10; - s->s_magic = AUTOFS_SUPER_MAGIC; - s->s_op = &autofs_sops; - s->s_time_gran = 1; - sbi->sb = s; - - root_inode = autofs_iget(s, AUTOFS_ROOT_INO); - if (IS_ERR(root_inode)) - goto fail_free; - root = d_alloc_root(root_inode); - pipe = NULL; - - if (!root) - goto fail_iput; - - /* Can this call block? - WTF cares? s is locked. */ - if (parse_options(data, &pipefd, &root_inode->i_uid, - &root_inode->i_gid, &pgid, &minproto, - &maxproto)) { - printk("autofs: called with bogus options\n"); - goto fail_dput; - } - - /* Couldn't this be tested earlier? */ - if (minproto > AUTOFS_PROTO_VERSION || - maxproto < AUTOFS_PROTO_VERSION) { - printk("autofs: kernel does not match daemon version\n"); - goto fail_dput; - } - - DPRINTK(("autofs: pipe fd = %d, pgrp = %u\n", pipefd, pgid)); - sbi->oz_pgrp = find_get_pid(pgid); - - if (!sbi->oz_pgrp) { - printk("autofs: could not find process group %d\n", pgid); - goto fail_dput; - } - - pipe = fget(pipefd); - - if (!pipe) { - printk("autofs: could not open pipe file descriptor\n"); - goto fail_put_pid; - } - - if (!pipe->f_op || !pipe->f_op->write) - goto fail_fput; - sbi->pipe = pipe; - sbi->catatonic = 0; - - /* - * Success! Install the root dentry now to indicate completion. - */ - s->s_root = root; - return 0; - -fail_fput: - printk("autofs: pipe file descriptor does not contain proper ops\n"); - fput(pipe); -fail_put_pid: - put_pid(sbi->oz_pgrp); -fail_dput: - dput(root); - goto fail_free; -fail_iput: - printk("autofs: get root dentry failed\n"); - iput(root_inode); -fail_free: - kfree(sbi); - s->s_fs_info = NULL; -fail_unlock: - return -EINVAL; -} - -struct inode *autofs_iget(struct super_block *sb, unsigned long ino) -{ - unsigned int n; - struct autofs_sb_info *sbi = autofs_sbi(sb); - struct inode *inode; - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - - /* Initialize to the default case (stub directory) */ - - inode->i_op = &simple_dir_inode_operations; - inode->i_fop = &simple_dir_operations; - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO; - inode->i_nlink = 2; - inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; - - if (ino == AUTOFS_ROOT_INO) { - inode->i_mode = S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR; - inode->i_op = &autofs_root_inode_operations; - inode->i_fop = &autofs_root_operations; - goto done; - } - - inode->i_uid = inode->i_sb->s_root->d_inode->i_uid; - inode->i_gid = inode->i_sb->s_root->d_inode->i_gid; - - if (ino >= AUTOFS_FIRST_SYMLINK && ino < AUTOFS_FIRST_DIR_INO) { - /* Symlink inode - should be in symlink list */ - struct autofs_symlink *sl; - - n = ino - AUTOFS_FIRST_SYMLINK; - if (n >= AUTOFS_MAX_SYMLINKS || !test_bit(n,sbi->symlink_bitmap)) { - printk("autofs: Looking for bad symlink inode %u\n", (unsigned int) ino); - goto done; - } - - inode->i_op = &autofs_symlink_inode_operations; - sl = &sbi->symlink[n]; - inode->i_private = sl; - inode->i_mode = S_IFLNK | S_IRWXUGO; - inode->i_mtime.tv_sec = inode->i_ctime.tv_sec = sl->mtime; - inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = 0; - inode->i_size = sl->len; - inode->i_nlink = 1; - } - -done: - unlock_new_inode(inode); - return inode; -} diff --git a/fs/autofs/root.c b/fs/autofs/root.c deleted file mode 100644 index 0c4ca81..0000000 --- a/fs/autofs/root.c +++ /dev/null @@ -1,645 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * linux/fs/autofs/root.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ - -#include <linux/capability.h> -#include <linux/errno.h> -#include <linux/stat.h> -#include <linux/slab.h> -#include <linux/param.h> -#include <linux/time.h> -#include <linux/compat.h> -#include <linux/smp_lock.h> -#include "autofs_i.h" - -static int autofs_root_readdir(struct file *,void *,filldir_t); -static struct dentry *autofs_root_lookup(struct inode *,struct dentry *, struct nameidata *); -static int autofs_root_symlink(struct inode *,struct dentry *,const char *); -static int autofs_root_unlink(struct inode *,struct dentry *); -static int autofs_root_rmdir(struct inode *,struct dentry *); -static int autofs_root_mkdir(struct inode *,struct dentry *,int); -static long autofs_root_ioctl(struct file *,unsigned int,unsigned long); -#ifdef CONFIG_COMPAT -static long autofs_root_compat_ioctl(struct file *,unsigned int,unsigned long); -#endif - -const struct file_operations autofs_root_operations = { - .llseek = generic_file_llseek, - .read = generic_read_dir, - .readdir = autofs_root_readdir, - .unlocked_ioctl = autofs_root_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = autofs_root_compat_ioctl, -#endif -}; - -const struct inode_operations autofs_root_inode_operations = { - .lookup = autofs_root_lookup, - .unlink = autofs_root_unlink, - .symlink = autofs_root_symlink, - .mkdir = autofs_root_mkdir, - .rmdir = autofs_root_rmdir, -}; - -static int autofs_root_readdir(struct file *filp, void *dirent, filldir_t filldir) -{ - struct autofs_dir_ent *ent = NULL; - struct autofs_dirhash *dirhash; - struct autofs_sb_info *sbi; - struct inode * inode = filp->f_path.dentry->d_inode; - off_t onr, nr; - - lock_kernel(); - - sbi = autofs_sbi(inode->i_sb); - dirhash = &sbi->dirhash; - nr = filp->f_pos; - - switch(nr) - { - case 0: - if (filldir(dirent, ".", 1, nr, inode->i_ino, DT_DIR) < 0) - goto out; - filp->f_pos = ++nr; - /* fall through */ - case 1: - if (filldir(dirent, "..", 2, nr, inode->i_ino, DT_DIR) < 0) - goto out; - filp->f_pos = ++nr; - /* fall through */ - default: - while (onr = nr, ent = autofs_hash_enum(dirhash,&nr,ent)) { - if (!ent->dentry || d_mountpoint(ent->dentry)) { - if (filldir(dirent,ent->name,ent->len,onr,ent->ino,DT_UNKNOWN) < 0) - goto out; - filp->f_pos = nr; - } - } - break; - } - -out: - unlock_kernel(); - return 0; -} - -static int try_to_fill_dentry(struct dentry *dentry, struct super_block *sb, struct autofs_sb_info *sbi) -{ - struct inode * inode; - struct autofs_dir_ent *ent; - int status = 0; - - if (!(ent = autofs_hash_lookup(&sbi->dirhash, &dentry->d_name))) { - do { - if (status && dentry->d_inode) { - if (status != -ENOENT) - printk("autofs warning: lookup failure on positive dentry, status = %d, name = %s\n", status, dentry->d_name.name); - return 0; /* Try to get the kernel to invalidate this dentry */ - } - - /* Turn this into a real negative dentry? */ - if (status == -ENOENT) { - dentry->d_time = jiffies + AUTOFS_NEGATIVE_TIMEOUT; - dentry->d_flags &= ~DCACHE_AUTOFS_PENDING; - return 1; - } else if (status) { - /* Return a negative dentry, but leave it "pending" */ - return 1; - } - status = autofs_wait(sbi, &dentry->d_name); - } while (!(ent = autofs_hash_lookup(&sbi->dirhash, &dentry->d_name))); - } - - /* Abuse this field as a pointer to the directory entry, used to - find the expire list pointers */ - dentry->d_time = (unsigned long) ent; - - if (!dentry->d_inode) { - inode = autofs_iget(sb, ent->ino); - if (IS_ERR(inode)) { - /* Failed, but leave pending for next time */ - return 1; - } - dentry->d_inode = inode; - } - - /* If this is a directory that isn't a mount point, bitch at the - daemon and fix it in user space */ - if (S_ISDIR(dentry->d_inode->i_mode) && !d_mountpoint(dentry)) { - return !autofs_wait(sbi, &dentry->d_name); - } - - /* We don't update the usages for the autofs daemon itself, this - is necessary for recursive autofs mounts */ - if (!autofs_oz_mode(sbi)) { - autofs_update_usage(&sbi->dirhash,ent); - } - - dentry->d_flags &= ~DCACHE_AUTOFS_PENDING; - return 1; -} - - -/* - * Revalidate is called on every cache lookup. Some of those - * cache lookups may actually happen while the dentry is not - * yet completely filled in, and revalidate has to delay such - * lookups.. - */ -static int autofs_revalidate(struct dentry * dentry, struct nameidata *nd) -{ - struct inode * dir; - struct autofs_sb_info *sbi; - struct autofs_dir_ent *ent; - int res; - - lock_kernel(); - dir = dentry->d_parent->d_inode; - sbi = autofs_sbi(dir->i_sb); - - /* Pending dentry */ - if (dentry->d_flags & DCACHE_AUTOFS_PENDING) { - if (autofs_oz_mode(sbi)) - res = 1; - else - res = try_to_fill_dentry(dentry, dir->i_sb, sbi); - unlock_kernel(); - return res; - } - - /* Negative dentry.. invalidate if "old" */ - if (!dentry->d_inode) { - unlock_kernel(); - return (dentry->d_time - jiffies <= AUTOFS_NEGATIVE_TIMEOUT); - } - - /* Check for a non-mountpoint directory */ - if (S_ISDIR(dentry->d_inode->i_mode) && !d_mountpoint(dentry)) { - if (autofs_oz_mode(sbi)) - res = 1; - else - res = try_to_fill_dentry(dentry, dir->i_sb, sbi); - unlock_kernel(); - return res; - } - - /* Update the usage list */ - if (!autofs_oz_mode(sbi)) { - ent = (struct autofs_dir_ent *) dentry->d_time; - if (ent) - autofs_update_usage(&sbi->dirhash,ent); - } - unlock_kernel(); - return 1; -} - -static const struct dentry_operations autofs_dentry_operations = { - .d_revalidate = autofs_revalidate, -}; - -static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) -{ - struct autofs_sb_info *sbi; - int oz_mode; - - DPRINTK(("autofs_root_lookup: name = ")); - lock_kernel(); - autofs_say(dentry->d_name.name,dentry->d_name.len); - - if (dentry->d_name.len > NAME_MAX) { - unlock_kernel(); - return ERR_PTR(-ENAMETOOLONG);/* File name too long to exist */ - } - - sbi = autofs_sbi(dir->i_sb); - - oz_mode = autofs_oz_mode(sbi); - DPRINTK(("autofs_lookup: pid = %u, pgrp = %u, catatonic = %d, " - "oz_mode = %d\n", task_pid_nr(current), - task_pgrp_nr(current), sbi->catatonic, - oz_mode)); - - /* - * Mark the dentry incomplete, but add it. This is needed so - * that the VFS layer knows about the dentry, and we can count - * on catching any lookups through the revalidate. - * - * Let all the hard work be done by the revalidate function that - * needs to be able to do this anyway.. - * - * We need to do this before we release the directory semaphore. - */ - dentry->d_op = &autofs_dentry_operations; - dentry->d_flags |= DCACHE_AUTOFS_PENDING; - d_add(dentry, NULL); - - mutex_unlock(&dir->i_mutex); - autofs_revalidate(dentry, nd); - mutex_lock(&dir->i_mutex); - - /* - * If we are still pending, check if we had to handle - * a signal. If so we can force a restart.. - */ - if (dentry->d_flags & DCACHE_AUTOFS_PENDING) { - /* See if we were interrupted */ - if (signal_pending(current)) { - sigset_t *sigset = ¤t->pending.signal; - if (sigismember (sigset, SIGKILL) || - sigismember (sigset, SIGQUIT) || - sigismember (sigset, SIGINT)) { - unlock_kernel(); - return ERR_PTR(-ERESTARTNOINTR); - } - } - } - unlock_kernel(); - - /* - * If this dentry is unhashed, then we shouldn't honour this - * lookup even if the dentry is positive. Returning ENOENT here - * doesn't do the right thing for all system calls, but it should - * be OK for the operations we permit from an autofs. - */ - if (dentry->d_inode && d_unhashed(dentry)) - return ERR_PTR(-ENOENT); - - return NULL; -} - -static int autofs_root_symlink(struct inode *dir, struct dentry *dentry, const char *symname) -{ - struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb); - struct autofs_dirhash *dh = &sbi->dirhash; - struct autofs_dir_ent *ent; - unsigned int n; - int slsize; - struct autofs_symlink *sl; - struct inode *inode; - - DPRINTK(("autofs_root_symlink: %s <- ", symname)); - autofs_say(dentry->d_name.name,dentry->d_name.len); - - lock_kernel(); - if (!autofs_oz_mode(sbi)) { - unlock_kernel(); - return -EACCES; - } - - if (autofs_hash_lookup(dh, &dentry->d_name)) { - unlock_kernel(); - return -EEXIST; - } - - n = find_first_zero_bit(sbi->symlink_bitmap,AUTOFS_MAX_SYMLINKS); - if (n >= AUTOFS_MAX_SYMLINKS) { - unlock_kernel(); - return -ENOSPC; - } - - set_bit(n,sbi->symlink_bitmap); - sl = &sbi->symlink[n]; - sl->len = strlen(symname); - sl->data = kmalloc(slsize = sl->len+1, GFP_KERNEL); - if (!sl->data) { - clear_bit(n,sbi->symlink_bitmap); - unlock_kernel(); - return -ENOSPC; - } - - ent = kmalloc(sizeof(struct autofs_dir_ent), GFP_KERNEL); - if (!ent) { - kfree(sl->data); - clear_bit(n,sbi->symlink_bitmap); - unlock_kernel(); - return -ENOSPC; - } - - ent->name = kmalloc(dentry->d_name.len+1, GFP_KERNEL); - if (!ent->name) { - kfree(sl->data); - kfree(ent); - clear_bit(n,sbi->symlink_bitmap); - unlock_kernel(); - return -ENOSPC; - } - - memcpy(sl->data,symname,slsize); - sl->mtime = get_seconds(); - - ent->ino = AUTOFS_FIRST_SYMLINK + n; - ent->hash = dentry->d_name.hash; - memcpy(ent->name, dentry->d_name.name, 1+(ent->len = dentry->d_name.len)); - ent->dentry = NULL; /* We don't keep the dentry for symlinks */ - - autofs_hash_insert(dh,ent); - - inode = autofs_iget(dir->i_sb, ent->ino); - if (IS_ERR(inode)) - return PTR_ERR(inode); - - d_instantiate(dentry, inode); - unlock_kernel(); - return 0; -} - -/* - * NOTE! - * - * Normal filesystems would do a "d_delete()" to tell the VFS dcache - * that the file no longer exists. However, doing that means that the - * VFS layer can turn the dentry into a negative dentry, which we - * obviously do not want (we're dropping the entry not because it - * doesn't exist, but because it has timed out). - * - * Also see autofs_root_rmdir().. - */ -static int autofs_root_unlink(struct inode *dir, struct dentry *dentry) -{ - struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb); - struct autofs_dirhash *dh = &sbi->dirhash; - struct autofs_dir_ent *ent; - unsigned int n; - - /* This allows root to remove symlinks */ - lock_kernel(); - if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) { - unlock_kernel(); - return -EACCES; - } - - ent = autofs_hash_lookup(dh, &dentry->d_name); - if (!ent) { - unlock_kernel(); - return -ENOENT; - } - - n = ent->ino - AUTOFS_FIRST_SYMLINK; - if (n >= AUTOFS_MAX_SYMLINKS) { - unlock_kernel(); - return -EISDIR; /* It's a directory, dummy */ - } - if (!test_bit(n,sbi->symlink_bitmap)) { - unlock_kernel(); - return -EINVAL; /* Nonexistent symlink? Shouldn't happen */ - } - - dentry->d_time = (unsigned long)(struct autofs_dirhash *)NULL; - autofs_hash_delete(ent); - clear_bit(n,sbi->symlink_bitmap); - kfree(sbi->symlink[n].data); - d_drop(dentry); - - unlock_kernel(); - return 0; -} - -static int autofs_root_rmdir(struct inode *dir, struct dentry *dentry) -{ - struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb); - struct autofs_dirhash *dh = &sbi->dirhash; - struct autofs_dir_ent *ent; - - lock_kernel(); - if (!autofs_oz_mode(sbi)) { - unlock_kernel(); - return -EACCES; - } - - ent = autofs_hash_lookup(dh, &dentry->d_name); - if (!ent) { - unlock_kernel(); - return -ENOENT; - } - - if ((unsigned int)ent->ino < AUTOFS_FIRST_DIR_INO) { - unlock_kernel(); - return -ENOTDIR; /* Not a directory */ - } - - if (ent->dentry != dentry) { - printk("autofs_rmdir: odentry != dentry for entry %s\n", dentry->d_name.name); - } - - dentry->d_time = (unsigned long)(struct autofs_dir_ent *)NULL; - autofs_hash_delete(ent); - drop_nlink(dir); - d_drop(dentry); - unlock_kernel(); - - return 0; -} - -static int autofs_root_mkdir(struct inode *dir, struct dentry *dentry, int mode) -{ - struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb); - struct autofs_dirhash *dh = &sbi->dirhash; - struct autofs_dir_ent *ent; - struct inode *inode; - ino_t ino; - - lock_kernel(); - if (!autofs_oz_mode(sbi)) { - unlock_kernel(); - return -EACCES; - } - - ent = autofs_hash_lookup(dh, &dentry->d_name); - if (ent) { - unlock_kernel(); - return -EEXIST; - } - - if (sbi->next_dir_ino < AUTOFS_FIRST_DIR_INO) { - printk("autofs: Out of inode numbers -- what the heck did you do??\n"); - unlock_kernel(); - return -ENOSPC; - } - ino = sbi->next_dir_ino++; - - ent = kmalloc(sizeof(struct autofs_dir_ent), GFP_KERNEL); - if (!ent) { - unlock_kernel(); - return -ENOSPC; - } - - ent->name = kmalloc(dentry->d_name.len+1, GFP_KERNEL); - if (!ent->name) { - kfree(ent); - unlock_kernel(); - return -ENOSPC; - } - - ent->hash = dentry->d_name.hash; - memcpy(ent->name, dentry->d_name.name, 1+(ent->len = dentry->d_name.len)); - ent->ino = ino; - ent->dentry = dentry; - autofs_hash_insert(dh,ent); - - inc_nlink(dir); - - inode = autofs_iget(dir->i_sb, ino); - if (IS_ERR(inode)) { - drop_nlink(dir); - return PTR_ERR(inode); - } - - d_instantiate(dentry, inode); - unlock_kernel(); - - return 0; -} - -/* Get/set timeout ioctl() operation */ -#ifdef CONFIG_COMPAT -static inline int autofs_compat_get_set_timeout(struct autofs_sb_info *sbi, - unsigned int __user *p) -{ - unsigned long ntimeout; - - if (get_user(ntimeout, p) || - put_user(sbi->exp_timeout / HZ, p)) - return -EFAULT; - - if (ntimeout > UINT_MAX/HZ) - sbi->exp_timeout = 0; - else - sbi->exp_timeout = ntimeout * HZ; - - return 0; -} -#endif - -static inline int autofs_get_set_timeout(struct autofs_sb_info *sbi, - unsigned long __user *p) -{ - unsigned long ntimeout; - - if (get_user(ntimeout, p) || - put_user(sbi->exp_timeout / HZ, p)) - return -EFAULT; - - if (ntimeout > ULONG_MAX/HZ) - sbi->exp_timeout = 0; - else - sbi->exp_timeout = ntimeout * HZ; - - return 0; -} - -/* Return protocol version */ -static inline int autofs_get_protover(int __user *p) -{ - return put_user(AUTOFS_PROTO_VERSION, p); -} - -/* Perform an expiry operation */ -static inline int autofs_expire_run(struct super_block *sb, - struct autofs_sb_info *sbi, - struct vfsmount *mnt, - struct autofs_packet_expire __user *pkt_p) -{ - struct autofs_dir_ent *ent; - struct autofs_packet_expire pkt; - - memset(&pkt,0,sizeof pkt); - - pkt.hdr.proto_version = AUTOFS_PROTO_VERSION; - pkt.hdr.type = autofs_ptype_expire; - - if (!sbi->exp_timeout || !(ent = autofs_expire(sb,sbi,mnt))) - return -EAGAIN; - - pkt.len = ent->len; - memcpy(pkt.name, ent->name, pkt.len); - pkt.name[pkt.len] = '\0'; - - if (copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire))) - return -EFAULT; - - return 0; -} - -/* - * ioctl()'s on the root directory is the chief method for the daemon to - * generate kernel reactions - */ -static int autofs_do_root_ioctl(struct inode *inode, struct file *filp, - unsigned int cmd, unsigned long arg) -{ - struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb); - void __user *argp = (void __user *)arg; - - DPRINTK(("autofs_ioctl: cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",cmd,arg,sbi,task_pgrp_nr(current))); - - if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) || - _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT) - return -ENOTTY; - - if (!autofs_oz_mode(sbi) && !capable(CAP_SYS_ADMIN)) - return -EPERM; - - switch(cmd) { - case AUTOFS_IOC_READY: /* Wait queue: go ahead and retry */ - return autofs_wait_release(sbi,(autofs_wqt_t)arg,0); - case AUTOFS_IOC_FAIL: /* Wait queue: fail with ENOENT */ - return autofs_wait_release(sbi,(autofs_wqt_t)arg,-ENOENT); - case AUTOFS_IOC_CATATONIC: /* Enter catatonic mode (daemon shutdown) */ - autofs_catatonic_mode(sbi); - return 0; - case AUTOFS_IOC_PROTOVER: /* Get protocol version */ - return autofs_get_protover(argp); -#ifdef CONFIG_COMPAT - case AUTOFS_IOC_SETTIMEOUT32: - return autofs_compat_get_set_timeout(sbi, argp); -#endif - case AUTOFS_IOC_SETTIMEOUT: - return autofs_get_set_timeout(sbi, argp); - case AUTOFS_IOC_EXPIRE: - return autofs_expire_run(inode->i_sb, sbi, filp->f_path.mnt, - argp); - default: - return -ENOSYS; - } - -} - -static long autofs_root_ioctl(struct file *filp, - unsigned int cmd, unsigned long arg) -{ - int ret; - - lock_kernel(); - ret = autofs_do_root_ioctl(filp->f_path.dentry->d_inode, - filp, cmd, arg); - unlock_kernel(); - - return ret; -} - -#ifdef CONFIG_COMPAT -static long autofs_root_compat_ioctl(struct file *filp, - unsigned int cmd, unsigned long arg) -{ - struct inode *inode = filp->f_path.dentry->d_inode; - int ret; - - lock_kernel(); - if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL) - ret = autofs_do_root_ioctl(inode, filp, cmd, arg); - else - ret = autofs_do_root_ioctl(inode, filp, cmd, - (unsigned long)compat_ptr(arg)); - unlock_kernel(); - - return ret; -} -#endif diff --git a/fs/autofs/symlink.c b/fs/autofs/symlink.c deleted file mode 100644 index 7ce9cb2..0000000 --- a/fs/autofs/symlink.c +++ /dev/null @@ -1,26 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * linux/fs/autofs/symlink.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ - -#include "autofs_i.h" - -/* Nothing to release.. */ -static void *autofs_follow_link(struct dentry *dentry, struct nameidata *nd) -{ - char *s=((struct autofs_symlink *)dentry->d_inode->i_private)->data; - nd_set_link(nd, s); - return NULL; -} - -const struct inode_operations autofs_symlink_inode_operations = { - .readlink = generic_readlink, - .follow_link = autofs_follow_link -}; diff --git a/fs/autofs/waitq.c b/fs/autofs/waitq.c deleted file mode 100644 index be46805..0000000 --- a/fs/autofs/waitq.c +++ /dev/null @@ -1,205 +0,0 @@ -/* -*- linux-c -*- --------------------------------------------------------- * - * - * linux/fs/autofs/waitq.c - * - * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved - * - * This file is part of the Linux kernel and is made available under - * the terms of the GNU General Public License, version 2, or at your - * option, any later version, incorporated herein by reference. - * - * ------------------------------------------------------------------------- */ - -#include <linux/slab.h> -#include <linux/time.h> -#include <linux/signal.h> -#include <linux/file.h> -#include "autofs_i.h" - -/* We make this a static variable rather than a part of the superblock; it - is better if we don't reassign numbers easily even across filesystems */ -static autofs_wqt_t autofs_next_wait_queue = 1; - -/* These are the signals we allow interrupting a pending mount */ -#define SHUTDOWN_SIGS (sigmask(SIGKILL) | sigmask(SIGINT) | sigmask(SIGQUIT)) - -void autofs_catatonic_mode(struct autofs_sb_info *sbi) -{ - struct autofs_wait_queue *wq, *nwq; - - DPRINTK(("autofs: entering catatonic mode\n")); - - sbi->catatonic = 1; - wq = sbi->queues; - sbi->queues = NULL; /* Erase all wait queues */ - while ( wq ) { - nwq = wq->next; - wq->status = -ENOENT; /* Magic is gone - report failure */ - kfree(wq->name); - wq->name = NULL; - wake_up(&wq->queue); - wq = nwq; - } - fput(sbi->pipe); /* Close the pipe */ - sbi->pipe = NULL; - autofs_hash_dputall(&sbi->dirhash); /* Remove all dentry pointers */ -} - -static int autofs_write(struct file *file, const void *addr, int bytes) -{ - unsigned long sigpipe, flags; - mm_segment_t fs; - const char *data = (const char *)addr; - ssize_t wr = 0; - - /** WARNING: this is not safe for writing more than PIPE_BUF bytes! **/ - - sigpipe = sigismember(¤t->pending.signal, SIGPIPE); - - /* Save pointer to user space and point back to kernel space */ - fs = get_fs(); - set_fs(KERNEL_DS); - - while (bytes && - (wr = file->f_op->write(file,data,bytes,&file->f_pos)) > 0) { - data += wr; - bytes -= wr; - } - - set_fs(fs); - - /* Keep the currently executing process from receiving a - SIGPIPE unless it was already supposed to get one */ - if (wr == -EPIPE && !sigpipe) { - spin_lock_irqsave(¤t->sighand->siglock, flags); - sigdelset(¤t->pending.signal, SIGPIPE); - recalc_sigpending(); - spin_unlock_irqrestore(¤t->sighand->siglock, flags); - } - - return (bytes > 0); -} - -static void autofs_notify_daemon(struct autofs_sb_info *sbi, struct autofs_wait_queue *wq) -{ - struct autofs_packet_missing pkt; - - DPRINTK(("autofs_wait: wait id = 0x%08lx, name = ", wq->wait_queue_token)); - autofs_say(wq->name,wq->len); - - memset(&pkt,0,sizeof pkt); /* For security reasons */ - - pkt.hdr.proto_version = AUTOFS_PROTO_VERSION; - pkt.hdr.type = autofs_ptype_missing; - pkt.wait_queue_token = wq->wait_queue_token; - pkt.len = wq->len; - memcpy(pkt.name, wq->name, pkt.len); - pkt.name[pkt.len] = '\0'; - - if ( autofs_write(sbi->pipe,&pkt,sizeof(struct autofs_packet_missing)) ) - autofs_catatonic_mode(sbi); -} - -int autofs_wait(struct autofs_sb_info *sbi, struct qstr *name) -{ - struct autofs_wait_queue *wq; - int status; - - /* In catatonic mode, we don't wait for nobody */ - if ( sbi->catatonic ) - return -ENOENT; - - /* We shouldn't be able to get here, but just in case */ - if ( name->len > NAME_MAX ) - return -ENOENT; - - for ( wq = sbi->queues ; wq ; wq = wq->next ) { - if ( wq->hash == name->hash && - wq->len == name->len && - wq->name && !memcmp(wq->name,name->name,name->len) ) - break; - } - - if ( !wq ) { - /* Create a new wait queue */ - wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL); - if ( !wq ) - return -ENOMEM; - - wq->name = kmalloc(name->len,GFP_KERNEL); - if ( !wq->name ) { - kfree(wq); - return -ENOMEM; - } - wq->wait_queue_token = autofs_next_wait_queue++; - init_waitqueue_head(&wq->queue); - wq->hash = name->hash; - wq->len = name->len; - wq->status = -EINTR; /* Status return if interrupted */ - memcpy(wq->name, name->name, name->len); - wq->next = sbi->queues; - sbi->queues = wq; - - /* autofs_notify_daemon() may block */ - wq->wait_ctr = 2; - autofs_notify_daemon(sbi,wq); - } else - wq->wait_ctr++; - - /* wq->name is NULL if and only if the lock is already released */ - - if ( sbi->catatonic ) { - /* We might have slept, so check again for catatonic mode */ - wq->status = -ENOENT; - kfree(wq->name); - wq->name = NULL; - } - - if ( wq->name ) { - /* Block all but "shutdown" signals while waiting */ - sigset_t sigmask; - - siginitsetinv(&sigmask, SHUTDOWN_SIGS); - sigprocmask(SIG_BLOCK, &sigmask, &sigmask); - - interruptible_sleep_on(&wq->queue); - - sigprocmask(SIG_SETMASK, &sigmask, NULL); - } else { - DPRINTK(("autofs_wait: skipped sleeping\n")); - } - - status = wq->status; - - if ( ! --wq->wait_ctr ) /* Are we the last process to need status? */ - kfree(wq); - - return status; -} - - -int autofs_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_token, int status) -{ - struct autofs_wait_queue *wq, **wql; - - for (wql = &sbi->queues; (wq = *wql) != NULL; wql = &wq->next) { - if ( wq->wait_queue_token == wait_queue_token ) - break; - } - if ( !wq ) - return -EINVAL; - - *wql = wq->next; /* Unlink from chain */ - kfree(wq->name); - wq->name = NULL; /* Do not wait on this queue */ - - wq->status = status; - - if ( ! --wq->wait_ctr ) /* Is anyone still waiting for this guy? */ - kfree(wq); - else - wake_up(&wq->queue); - - return 0; -} - diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index 3d283ab..0fffe1c 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -16,6 +16,7 @@ #include <linux/auto_fs4.h> #include <linux/auto_dev-ioctl.h> #include <linux/mutex.h> +#include <linux/spinlock.h> #include <linux/list.h> /* This is the range of ioctl() numbers we claim as ours */ @@ -60,6 +61,8 @@ do { \ current->pid, __func__, ##args); \ } while (0) +extern spinlock_t autofs4_lock; + /* Unified info structure. This is pointed to by both the dentry and inode structures. Each file in the filesystem has an instance of this structure. It holds a reference to the dentry, so dentries are never @@ -254,17 +257,15 @@ static inline int simple_positive(struct dentry *dentry) return dentry->d_inode && !d_unhashed(dentry); } -static inline int __simple_empty(struct dentry *dentry) +static inline void __autofs4_add_expiring(struct dentry *dentry) { - struct dentry *child; - int ret = 0; - - list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) - if (simple_positive(child)) - goto out; - ret = 1; -out: - return ret; + struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); + struct autofs_info *ino = autofs4_dentry_ino(dentry); + if (ino) { + if (list_empty(&ino->expiring)) + list_add(&ino->expiring, &sbi->expiring_list); + } + return; } static inline void autofs4_add_expiring(struct dentry *dentry) diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index a796c94..cc1d013 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -91,24 +91,64 @@ done: } /* - * Calculate next entry in top down tree traversal. - * From next_mnt in namespace.c - elegant. + * Calculate and dget next entry in top down tree traversal. */ -static struct dentry *next_dentry(struct dentry *p, struct dentry *root) +static struct dentry *get_next_positive_dentry(struct dentry *prev, + struct dentry *root) { - struct list_head *next = p->d_subdirs.next; + struct list_head *next; + struct dentry *p, *ret; + + if (prev == NULL) + return dget(prev); + spin_lock(&autofs4_lock); +relock: + p = prev; + spin_lock(&p->d_lock); +again: + next = p->d_subdirs.next; if (next == &p->d_subdirs) { while (1) { - if (p == root) + struct dentry *parent; + + if (p == root) { + spin_unlock(&p->d_lock); + spin_unlock(&autofs4_lock); + dput(prev); return NULL; + } + + parent = p->d_parent; + if (!spin_trylock(&parent->d_lock)) { + spin_unlock(&p->d_lock); + cpu_relax(); + goto relock; + } + spin_unlock(&p->d_lock); next = p->d_u.d_child.next; - if (next != &p->d_parent->d_subdirs) + p = parent; + if (next != &parent->d_subdirs) break; - p = p->d_parent; } } - return list_entry(next, struct dentry, d_u.d_child); + ret = list_entry(next, struct dentry, d_u.d_child); + + spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED); + /* Negative dentry - try next */ + if (!simple_positive(ret)) { + spin_unlock(&ret->d_lock); + p = ret; + goto again; + } + dget_dlock(ret); + spin_unlock(&ret->d_lock); + spin_unlock(&p->d_lock); + spin_unlock(&autofs4_lock); + + dput(prev); + + return ret; } /* @@ -158,18 +198,11 @@ static int autofs4_tree_busy(struct vfsmount *mnt, if (!simple_positive(top)) return 1; - spin_lock(&dcache_lock); - for (p = top; p; p = next_dentry(p, top)) { - /* Negative dentry - give up */ - if (!simple_positive(p)) - continue; - + p = NULL; + while ((p = get_next_positive_dentry(p, top))) { DPRINTK("dentry %p %.*s", p, (int) p->d_name.len, p->d_name.name); - p = dget(p); - spin_unlock(&dcache_lock); - /* * Is someone visiting anywhere in the subtree ? * If there's no mount we need to check the usage @@ -198,16 +231,13 @@ static int autofs4_tree_busy(struct vfsmount *mnt, else ino_count++; - if (atomic_read(&p->d_count) > ino_count) { + if (p->d_count > ino_count) { top_ino->last_used = jiffies; dput(p); return 1; } } - dput(p); - spin_lock(&dcache_lock); } - spin_unlock(&dcache_lock); /* Timeout of a tree mount is ultimately determined by its top dentry */ if (!autofs4_can_expire(top, timeout, do_now)) @@ -226,32 +256,21 @@ static struct dentry *autofs4_check_leaves(struct vfsmount *mnt, DPRINTK("parent %p %.*s", parent, (int)parent->d_name.len, parent->d_name.name); - spin_lock(&dcache_lock); - for (p = parent; p; p = next_dentry(p, parent)) { - /* Negative dentry - give up */ - if (!simple_positive(p)) - continue; - + p = NULL; + while ((p = get_next_positive_dentry(p, parent))) { DPRINTK("dentry %p %.*s", p, (int) p->d_name.len, p->d_name.name); - p = dget(p); - spin_unlock(&dcache_lock); - if (d_mountpoint(p)) { /* Can we umount this guy */ if (autofs4_mount_busy(mnt, p)) - goto cont; + continue; /* Can we expire this guy */ if (autofs4_can_expire(p, timeout, do_now)) return p; } -cont: - dput(p); - spin_lock(&dcache_lock); } - spin_unlock(&dcache_lock); return NULL; } @@ -276,7 +295,9 @@ struct dentry *autofs4_expire_direct(struct super_block *sb, struct autofs_info *ino = autofs4_dentry_ino(root); if (d_mountpoint(root)) { ino->flags |= AUTOFS_INF_MOUNTPOINT; - root->d_mounted--; + spin_lock(&root->d_lock); + root->d_flags &= ~DCACHE_MOUNTED; + spin_unlock(&root->d_lock); } ino->flags |= AUTOFS_INF_EXPIRING; init_completion(&ino->expire_complete); @@ -302,8 +323,8 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, { unsigned long timeout; struct dentry *root = sb->s_root; + struct dentry *dentry; struct dentry *expired = NULL; - struct list_head *next; int do_now = how & AUTOFS_EXP_IMMEDIATE; int exp_leaves = how & AUTOFS_EXP_LEAVES; struct autofs_info *ino; @@ -315,23 +336,8 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, now = jiffies; timeout = sbi->exp_timeout; - spin_lock(&dcache_lock); - next = root->d_subdirs.next; - - /* On exit from the loop expire is set to a dgot dentry - * to expire or it's NULL */ - while ( next != &root->d_subdirs ) { - struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child); - - /* Negative dentry - give up */ - if (!simple_positive(dentry)) { - next = next->next; - continue; - } - - dentry = dget(dentry); - spin_unlock(&dcache_lock); - + dentry = NULL; + while ((dentry = get_next_positive_dentry(dentry, root))) { spin_lock(&sbi->fs_lock); ino = autofs4_dentry_ino(dentry); @@ -347,7 +353,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, /* Path walk currently on this dentry? */ ino_count = atomic_read(&ino->count) + 2; - if (atomic_read(&dentry->d_count) > ino_count) + if (dentry->d_count > ino_count) goto next; /* Can we umount this guy */ @@ -369,7 +375,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, if (!exp_leaves) { /* Path walk currently on this dentry? */ ino_count = atomic_read(&ino->count) + 1; - if (atomic_read(&dentry->d_count) > ino_count) + if (dentry->d_count > ino_count) goto next; if (!autofs4_tree_busy(mnt, dentry, timeout, do_now)) { @@ -383,7 +389,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, } else { /* Path walk currently on this dentry? */ ino_count = atomic_read(&ino->count) + 1; - if (atomic_read(&dentry->d_count) > ino_count) + if (dentry->d_count > ino_count) goto next; expired = autofs4_check_leaves(mnt, dentry, timeout, do_now); @@ -394,11 +400,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb, } next: spin_unlock(&sbi->fs_lock); - dput(dentry); - spin_lock(&dcache_lock); - next = next->next; } - spin_unlock(&dcache_lock); return NULL; found: @@ -408,9 +410,13 @@ found: ino->flags |= AUTOFS_INF_EXPIRING; init_completion(&ino->expire_complete); spin_unlock(&sbi->fs_lock); - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); + spin_lock(&expired->d_parent->d_lock); + spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED); list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child); - spin_unlock(&dcache_lock); + spin_unlock(&expired->d_lock); + spin_unlock(&expired->d_parent->d_lock); + spin_unlock(&autofs4_lock); return expired; } @@ -499,7 +505,14 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, spin_lock(&sbi->fs_lock); if (ino->flags & AUTOFS_INF_MOUNTPOINT) { - sb->s_root->d_mounted++; + spin_lock(&sb->s_root->d_lock); + /* + * If we haven't been expired away, then reset + * mounted status. + */ + if (mnt->mnt_parent != mnt) + sb->s_root->d_flags |= DCACHE_MOUNTED; + spin_unlock(&sb->s_root->d_lock); ino->flags &= ~AUTOFS_INF_MOUNTPOINT; } ino->flags &= ~AUTOFS_INF_EXPIRING; diff --git a/fs/autofs4/init.c b/fs/autofs4/init.c index 9722e4b..c038727 100644 --- a/fs/autofs4/init.c +++ b/fs/autofs4/init.c @@ -14,16 +14,16 @@ #include <linux/init.h> #include "autofs_i.h" -static int autofs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *autofs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags, data, autofs4_fill_super, mnt); + return mount_nodev(fs_type, flags, data, autofs4_fill_super); } static struct file_system_type autofs_fs_type = { .owner = THIS_MODULE, .name = "autofs", - .get_sb = autofs_get_sb, + .mount = autofs_mount, .kill_sb = autofs4_kill_sb, }; diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index ac87e49..a7bdb9d 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -309,7 +309,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) goto fail_iput; pipe = NULL; - root->d_op = &autofs4_sb_dentry_operations; + d_set_d_op(root, &autofs4_sb_dentry_operations); root->d_fsdata = ino; /* Can this call block? */ diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index d5c1401..651e4ef 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -23,6 +23,8 @@ #include "autofs_i.h" +DEFINE_SPINLOCK(autofs4_lock); + static int autofs4_dir_symlink(struct inode *,struct dentry *,const char *); static int autofs4_dir_unlink(struct inode *,struct dentry *); static int autofs4_dir_rmdir(struct inode *,struct dentry *); @@ -142,12 +144,15 @@ static int autofs4_dir_open(struct inode *inode, struct file *file) * autofs file system so just let the libfs routines handle * it. */ - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); + spin_lock(&dentry->d_lock); if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) { - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); return -ENOENT; } - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); out: return dcache_dir_open(inode, file); @@ -252,9 +257,11 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd) /* We trigger a mount for almost all flags */ lookup_type = autofs4_need_mount(nd->flags); spin_lock(&sbi->fs_lock); - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); + spin_lock(&dentry->d_lock); if (!(lookup_type || ino->flags & AUTOFS_INF_PENDING)) { - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); spin_unlock(&sbi->fs_lock); goto follow; } @@ -266,7 +273,8 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd) */ if (ino->flags & AUTOFS_INF_PENDING || (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs))) { - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); spin_unlock(&sbi->fs_lock); status = try_to_fill_dentry(dentry, nd->flags); @@ -275,7 +283,8 @@ static void *autofs4_follow_link(struct dentry *dentry, struct nameidata *nd) goto follow; } - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); spin_unlock(&sbi->fs_lock); follow: /* @@ -306,12 +315,19 @@ out_error: */ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct inode *dir = dentry->d_parent->d_inode; - struct autofs_sb_info *sbi = autofs4_sbi(dir->i_sb); - int oz_mode = autofs4_oz_mode(sbi); + struct inode *dir; + struct autofs_sb_info *sbi; + int oz_mode; int flags = nd ? nd->flags : 0; int status = 1; + if (flags & LOOKUP_RCU) + return -ECHILD; + + dir = dentry->d_parent->d_inode; + sbi = autofs4_sbi(dir->i_sb); + oz_mode = autofs4_oz_mode(sbi); + /* Pending dentry */ spin_lock(&sbi->fs_lock); if (autofs4_ispending(dentry)) { @@ -346,12 +362,14 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd) return 0; /* Check for a non-mountpoint directory with no contents */ - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); + spin_lock(&dentry->d_lock); if (S_ISDIR(dentry->d_inode->i_mode) && !d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) { DPRINTK("dentry=%p %.*s, emptydir", dentry, dentry->d_name.len, dentry->d_name.name); - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); /* The daemon never causes a mount to trigger */ if (oz_mode) @@ -367,7 +385,8 @@ static int autofs4_revalidate(struct dentry *dentry, struct nameidata *nd) return status; } - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&autofs4_lock); return 1; } @@ -422,7 +441,7 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry) const unsigned char *str = name->name; struct list_head *p, *head; - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); spin_lock(&sbi->lookup_lock); head = &sbi->active_list; list_for_each(p, head) { @@ -436,7 +455,7 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry) spin_lock(&active->d_lock); /* Already gone? */ - if (atomic_read(&active->d_count) == 0) + if (active->d_count == 0) goto next; qstr = &active->d_name; @@ -452,17 +471,17 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry) goto next; if (d_unhashed(active)) { - dget(active); + dget_dlock(active); spin_unlock(&active->d_lock); spin_unlock(&sbi->lookup_lock); - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); return active; } next: spin_unlock(&active->d_lock); } spin_unlock(&sbi->lookup_lock); - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); return NULL; } @@ -477,7 +496,7 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry) const unsigned char *str = name->name; struct list_head *p, *head; - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); spin_lock(&sbi->lookup_lock); head = &sbi->expiring_list; list_for_each(p, head) { @@ -507,17 +526,17 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry) goto next; if (d_unhashed(expiring)) { - dget(expiring); + dget_dlock(expiring); spin_unlock(&expiring->d_lock); spin_unlock(&sbi->lookup_lock); - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); return expiring; } next: spin_unlock(&expiring->d_lock); } spin_unlock(&sbi->lookup_lock); - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); return NULL; } @@ -559,7 +578,7 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s * we check for the hashed dentry and return the newly * hashed dentry. */ - dentry->d_op = &autofs4_root_dentry_operations; + d_set_d_op(dentry, &autofs4_root_dentry_operations); /* * And we need to ensure that the same dentry is used for @@ -698,9 +717,9 @@ static int autofs4_dir_symlink(struct inode *dir, d_add(dentry, inode); if (dir == dir->i_sb->s_root->d_inode) - dentry->d_op = &autofs4_root_dentry_operations; + d_set_d_op(dentry, &autofs4_root_dentry_operations); else - dentry->d_op = &autofs4_dentry_operations; + d_set_d_op(dentry, &autofs4_dentry_operations); dentry->d_fsdata = ino; ino->dentry = dget(dentry); @@ -753,12 +772,12 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry) dir->i_mtime = CURRENT_TIME; - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); autofs4_add_expiring(dentry); spin_lock(&dentry->d_lock); __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); return 0; } @@ -775,16 +794,20 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry) if (!autofs4_oz_mode(sbi)) return -EACCES; - spin_lock(&dcache_lock); + spin_lock(&autofs4_lock); + spin_lock(&sbi->lookup_lock); + spin_lock(&dentry->d_lock); if (!list_empty(&dentry->d_subdirs)) { - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); + spin_unlock(&sbi->lookup_lock); + spin_unlock(&autofs4_lock); return -ENOTEMPTY; } - autofs4_add_expiring(dentry); - spin_lock(&dentry->d_lock); + __autofs4_add_expiring(dentry); + spin_unlock(&sbi->lookup_lock); __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); if (atomic_dec_and_test(&ino->count)) { p_ino = autofs4_dentry_ino(dentry->d_parent); @@ -829,9 +852,9 @@ static int autofs4_dir_mkdir(struct inode *dir, struct dentry *dentry, int mode) d_add(dentry, inode); if (dir == dir->i_sb->s_root->d_inode) - dentry->d_op = &autofs4_root_dentry_operations; + d_set_d_op(dentry, &autofs4_root_dentry_operations); else - dentry->d_op = &autofs4_dentry_operations; + d_set_d_op(dentry, &autofs4_dentry_operations); dentry->d_fsdata = ino; ino->dentry = dget(dentry); @@ -980,19 +1003,11 @@ static int autofs4_root_ioctl_unlocked(struct inode *inode, struct file *filp, } } -static DEFINE_MUTEX(autofs4_ioctl_mutex); - static long autofs4_root_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { - long ret; struct inode *inode = filp->f_dentry->d_inode; - - mutex_lock(&autofs4_ioctl_mutex); - ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); - mutex_unlock(&autofs4_ioctl_mutex); - - return ret; + return autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); } #ifdef CONFIG_COMPAT @@ -1002,13 +1017,11 @@ static long autofs4_root_compat_ioctl(struct file *filp, struct inode *inode = filp->f_path.dentry->d_inode; int ret; - mutex_lock(&autofs4_ioctl_mutex); if (cmd == AUTOFS_IOC_READY || cmd == AUTOFS_IOC_FAIL) ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, arg); else ret = autofs4_root_ioctl_unlocked(inode, filp, cmd, (unsigned long)compat_ptr(arg)); - mutex_unlock(&autofs4_ioctl_mutex); return ret; } diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 2341375..c5f8459 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -186,16 +186,26 @@ static int autofs4_getpath(struct autofs_sb_info *sbi, { struct dentry *root = sbi->sb->s_root; struct dentry *tmp; - char *buf = *name; + char *buf; char *p; - int len = 0; + int len; + unsigned seq; - spin_lock(&dcache_lock); +rename_retry: + buf = *name; + len = 0; + + seq = read_seqbegin(&rename_lock); + rcu_read_lock(); + spin_lock(&autofs4_lock); for (tmp = dentry ; tmp != root ; tmp = tmp->d_parent) len += tmp->d_name.len + 1; if (!len || --len > NAME_MAX) { - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; return 0; } @@ -208,7 +218,10 @@ static int autofs4_getpath(struct autofs_sb_info *sbi, p -= tmp->d_name.len; strncpy(p, tmp->d_name.name, tmp->d_name.len); } - spin_unlock(&dcache_lock); + spin_unlock(&autofs4_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; return len; } diff --git a/fs/bad_inode.c b/fs/bad_inode.c index f024d8a..9ad2369 100644 --- a/fs/bad_inode.c +++ b/fs/bad_inode.c @@ -229,8 +229,11 @@ static int bad_inode_readlink(struct dentry *dentry, char __user *buffer, return -EIO; } -static int bad_inode_permission(struct inode *inode, int mask) +static int bad_inode_permission(struct inode *inode, int mask, unsigned int flags) { + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + return -EIO; } diff --git a/fs/befs/endian.h b/fs/befs/endian.h index 6cb84d8..2722387 100644 --- a/fs/befs/endian.h +++ b/fs/befs/endian.h @@ -102,22 +102,22 @@ cpu_to_fsrun(const struct super_block *sb, befs_block_run n) } static inline befs_data_stream -fsds_to_cpu(const struct super_block *sb, befs_disk_data_stream n) +fsds_to_cpu(const struct super_block *sb, const befs_disk_data_stream *n) { befs_data_stream data; int i; for (i = 0; i < BEFS_NUM_DIRECT_BLOCKS; ++i) - data.direct[i] = fsrun_to_cpu(sb, n.direct[i]); + data.direct[i] = fsrun_to_cpu(sb, n->direct[i]); - data.max_direct_range = fs64_to_cpu(sb, n.max_direct_range); - data.indirect = fsrun_to_cpu(sb, n.indirect); - data.max_indirect_range = fs64_to_cpu(sb, n.max_indirect_range); - data.double_indirect = fsrun_to_cpu(sb, n.double_indirect); + data.max_direct_range = fs64_to_cpu(sb, n->max_direct_range); + data.indirect = fsrun_to_cpu(sb, n->indirect); + data.max_indirect_range = fs64_to_cpu(sb, n->max_indirect_range); + data.double_indirect = fsrun_to_cpu(sb, n->double_indirect); data.max_double_indirect_range = fs64_to_cpu(sb, - n. + n-> max_double_indirect_range); - data.size = fs64_to_cpu(sb, n.size); + data.size = fs64_to_cpu(sb, n->size); return data; } diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c index dc39d28..b1d0c79 100644 --- a/fs/befs/linuxvfs.c +++ b/fs/befs/linuxvfs.c @@ -284,12 +284,18 @@ befs_alloc_inode(struct super_block *sb) return &bi->vfs_inode; } -static void -befs_destroy_inode(struct inode *inode) +static void befs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); } +static void befs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, befs_i_callback); +} + static void init_once(void *foo) { struct befs_inode_info *bi = (struct befs_inode_info *) foo; @@ -384,7 +390,7 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino) int num_blks; befs_ino->i_data.ds = - fsds_to_cpu(sb, raw_inode->data.datastream); + fsds_to_cpu(sb, &raw_inode->data.datastream); num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); inode->i_blocks = @@ -913,18 +919,17 @@ befs_statfs(struct dentry *dentry, struct kstatfs *buf) return 0; } -static int -befs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) +static struct dentry * +befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, + void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, befs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super); } static struct file_system_type befs_fs_type = { .owner = THIS_MODULE, .name = "befs", - .get_sb = befs_get_sb, + .mount = befs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c index 883e77a..a8e37f8 100644 --- a/fs/bfs/inode.c +++ b/fs/bfs/inode.c @@ -248,11 +248,18 @@ static struct inode *bfs_alloc_inode(struct super_block *sb) return &bi->vfs_inode; } -static void bfs_destroy_inode(struct inode *inode) +static void bfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); } +static void bfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, bfs_i_callback); +} + static void init_once(void *foo) { struct bfs_inode_info *bi = foo; @@ -450,16 +457,16 @@ out: return ret; } -static int bfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *bfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, bfs_fill_super); } static struct file_system_type bfs_fs_type = { .owner = THIS_MODULE, .name = "bfs", - .get_sb = bfs_get_sb, + .mount = bfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 6884e19..d5b640b 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -66,12 +66,11 @@ static int elf_core_dump(struct coredump_params *cprm); #define ELF_PAGEALIGN(_v) (((_v) + ELF_MIN_ALIGN - 1) & ~(ELF_MIN_ALIGN - 1)) static struct linux_binfmt elf_format = { - .module = THIS_MODULE, - .load_binary = load_elf_binary, - .load_shlib = load_elf_library, - .core_dump = elf_core_dump, - .min_coredump = ELF_EXEC_PAGESIZE, - .hasvdso = 1 + .module = THIS_MODULE, + .load_binary = load_elf_binary, + .load_shlib = load_elf_library, + .core_dump = elf_core_dump, + .min_coredump = ELF_EXEC_PAGESIZE, }; #define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE) @@ -316,8 +315,6 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec, return 0; } -#ifndef elf_map - static unsigned long elf_map(struct file *filep, unsigned long addr, struct elf_phdr *eppnt, int prot, int type, unsigned long total_size) @@ -354,8 +351,6 @@ static unsigned long elf_map(struct file *filep, unsigned long addr, return(map_addr); } -#endif /* !elf_map */ - static unsigned long total_mapping_size(struct elf_phdr *cmds, int nr) { int i, first_idx = -1, last_idx = -1; @@ -421,7 +416,7 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex, goto out; retval = kernel_read(interpreter, interp_elf_ex->e_phoff, - (char *)elf_phdata,size); + (char *)elf_phdata, size); error = -EIO; if (retval != size) { if (retval < 0) @@ -601,7 +596,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) goto out; if (!elf_check_arch(&loc->elf_ex)) goto out; - if (!bprm->file->f_op||!bprm->file->f_op->mmap) + if (!bprm->file->f_op || !bprm->file->f_op->mmap) goto out; /* Now read in all of the header information */ @@ -761,8 +756,8 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) /* There was a PT_LOAD segment with p_memsz > p_filesz before this one. Map anonymous pages, if needed, and clear the area. */ - retval = set_brk (elf_bss + load_bias, - elf_brk + load_bias); + retval = set_brk(elf_bss + load_bias, + elf_brk + load_bias); if (retval) { send_sig(SIGKILL, current, 0); goto out_free_dentry; diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 29990f0..1befe2e 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -706,10 +706,10 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent) return err; } -static int bm_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *bm_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_single(fs_type, flags, data, bm_fill_super, mnt); + return mount_single(fs_type, flags, data, bm_fill_super); } static struct linux_binfmt misc_format = { @@ -720,7 +720,7 @@ static struct linux_binfmt misc_format = { static struct file_system_type bm_fs_type = { .owner = THIS_MODULE, .name = "binfmt_misc", - .get_sb = bm_get_sb, + .mount = bm_mount, .kill_sb = kill_litter_super, }; @@ -370,6 +370,9 @@ struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs) { struct bio *bio; + if (nr_iovecs > UIO_MAXIOV) + return NULL; + bio = kmalloc(sizeof(struct bio) + nr_iovecs * sizeof(struct bio_vec), gfp_mask); if (unlikely(!bio)) @@ -697,8 +700,12 @@ static void bio_free_map_data(struct bio_map_data *bmd) static struct bio_map_data *bio_alloc_map_data(int nr_segs, int iov_count, gfp_t gfp_mask) { - struct bio_map_data *bmd = kmalloc(sizeof(*bmd), gfp_mask); + struct bio_map_data *bmd; + if (iov_count > UIO_MAXIOV) + return NULL; + + bmd = kmalloc(sizeof(*bmd), gfp_mask); if (!bmd) return NULL; @@ -827,6 +834,12 @@ struct bio *bio_copy_user_iov(struct request_queue *q, end = (uaddr + iov[i].iov_len + PAGE_SIZE - 1) >> PAGE_SHIFT; start = uaddr >> PAGE_SHIFT; + /* + * Overflow, abort + */ + if (end < start) + return ERR_PTR(-EINVAL); + nr_pages += end - start; len += iov[i].iov_len; } @@ -955,6 +968,12 @@ static struct bio *__bio_map_user_iov(struct request_queue *q, unsigned long end = (uaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned long start = uaddr >> PAGE_SHIFT; + /* + * Overflow, abort + */ + if (end < start) + return ERR_PTR(-EINVAL); + nr_pages += end - start; /* * buffer must be aligned to at least hardsector size for now @@ -982,7 +1001,7 @@ static struct bio *__bio_map_user_iov(struct request_queue *q, unsigned long start = uaddr >> PAGE_SHIFT; const int local_nr_pages = end - start; const int page_limit = cur_page + local_nr_pages; - + ret = get_user_pages_fast(uaddr, local_nr_pages, write_to_vm, &pages[cur_page]); if (ret < local_nr_pages) { diff --git a/fs/block_dev.c b/fs/block_dev.c index dea3b62..771f235 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -11,7 +11,6 @@ #include <linux/slab.h> #include <linux/kmod.h> #include <linux/major.h> -#include <linux/smp_lock.h> #include <linux/device_cgroup.h> #include <linux/highmem.h> #include <linux/blkdev.h> @@ -410,13 +409,20 @@ static struct inode *bdev_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void bdev_destroy_inode(struct inode *inode) +static void bdev_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); struct bdev_inode *bdi = BDEV_I(inode); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(bdev_cachep, bdi); } +static void bdev_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, bdev_i_callback); +} + static void init_once(void *foo) { struct bdev_inode *ei = (struct bdev_inode *) foo; @@ -464,15 +470,15 @@ static const struct super_operations bdev_sops = { .evict_inode = bdev_evict_inode, }; -static int bd_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *bd_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_pseudo(fs_type, "bdev:", &bdev_sops, 0x62646576, mnt); + return mount_pseudo(fs_type, "bdev:", &bdev_sops, 0x62646576); } static struct file_system_type bd_type = { .name = "bdev", - .get_sb = bd_get_sb, + .mount = bd_mount, .kill_sb = kill_anon_super, }; diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index 2222d16..6ae2c8c 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -185,18 +185,23 @@ static int btrfs_xattr_acl_set(struct dentry *dentry, const char *name, return ret; } -int btrfs_check_acl(struct inode *inode, int mask) +int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct posix_acl *acl; int error = -EAGAIN; - acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS); + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + error = -ECHILD; - if (IS_ERR(acl)) - return PTR_ERR(acl); - if (acl) { - error = posix_acl_permission(inode, acl, mask); - posix_acl_release(acl); + } else { + struct posix_acl *acl; + acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS); + if (IS_ERR(acl)) + return PTR_ERR(acl); + if (acl) { + error = posix_acl_permission(inode, acl, mask); + posix_acl_release(acl); + } } return error; diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 396039b..b50bc4b 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -91,23 +91,10 @@ static inline int compressed_bio_size(struct btrfs_root *root, static struct bio *compressed_bio_alloc(struct block_device *bdev, u64 first_byte, gfp_t gfp_flags) { - struct bio *bio; int nr_vecs; nr_vecs = bio_get_nr_vecs(bdev); - bio = bio_alloc(gfp_flags, nr_vecs); - - if (bio == NULL && (current->flags & PF_MEMALLOC)) { - while (!bio && (nr_vecs /= 2)) - bio = bio_alloc(gfp_flags, nr_vecs); - } - - if (bio) { - bio->bi_size = 0; - bio->bi_bdev = bdev; - bio->bi_sector = first_byte >> 9; - } - return bio; + return btrfs_bio_alloc(bdev, first_byte >> 9, nr_vecs, gfp_flags); } static int check_compressed_csum(struct inode *inode, @@ -163,7 +150,6 @@ fail: */ static void end_compressed_bio_read(struct bio *bio, int err) { - struct extent_io_tree *tree; struct compressed_bio *cb = bio->bi_private; struct inode *inode; struct page *page; @@ -187,7 +173,6 @@ static void end_compressed_bio_read(struct bio *bio, int err) /* ok, we're the last bio for this extent, lets start * the decompression. */ - tree = &BTRFS_I(inode)->io_tree; ret = btrfs_zlib_decompress_biovec(cb->compressed_pages, cb->start, cb->orig_bio->bi_io_vec, diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index c3df14c..9ac1715 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -200,7 +200,6 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans, struct extent_buffer **cow_ret, u64 new_root_objectid) { struct extent_buffer *cow; - u32 nritems; int ret = 0; int level; struct btrfs_disk_key disk_key; @@ -210,7 +209,6 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans, WARN_ON(root->ref_cows && trans->transid != root->last_trans); level = btrfs_header_level(buf); - nritems = btrfs_header_nritems(buf); if (level == 0) btrfs_item_key(buf, &disk_key, 0); else @@ -1008,7 +1006,6 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, int wret; int pslot; int orig_slot = path->slots[level]; - int err_on_enospc = 0; u64 orig_ptr; if (level == 0) @@ -1071,8 +1068,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, BTRFS_NODEPTRS_PER_BLOCK(root) / 4) return 0; - if (btrfs_header_nritems(mid) < 2) - err_on_enospc = 1; + btrfs_header_nritems(mid); left = read_node_slot(root, parent, pslot - 1); if (left) { @@ -1103,8 +1099,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, wret = push_node_left(trans, root, left, mid, 1); if (wret < 0) ret = wret; - if (btrfs_header_nritems(mid) < 2) - err_on_enospc = 1; + btrfs_header_nritems(mid); } /* @@ -1224,14 +1219,12 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans, int wret; int pslot; int orig_slot = path->slots[level]; - u64 orig_ptr; if (level == 0) return 1; mid = path->nodes[level]; WARN_ON(btrfs_header_generation(mid) != trans->transid); - orig_ptr = btrfs_node_blockptr(mid, orig_slot); if (level < BTRFS_MAX_LEVEL - 1) parent = path->nodes[level + 1]; @@ -1577,13 +1570,33 @@ read_block_for_search(struct btrfs_trans_handle *trans, blocksize = btrfs_level_size(root, level - 1); tmp = btrfs_find_tree_block(root, blocknr, blocksize); - if (tmp && btrfs_buffer_uptodate(tmp, gen)) { - /* - * we found an up to date block without sleeping, return - * right away - */ - *eb_ret = tmp; - return 0; + if (tmp) { + if (btrfs_buffer_uptodate(tmp, 0)) { + if (btrfs_buffer_uptodate(tmp, gen)) { + /* + * we found an up to date block without + * sleeping, return + * right away + */ + *eb_ret = tmp; + return 0; + } + /* the pages were up to date, but we failed + * the generation number check. Do a full + * read for the generation number that is correct. + * We must do this without dropping locks so + * we can trust our generation number + */ + free_extent_buffer(tmp); + tmp = read_tree_block(root, blocknr, blocksize, gen); + if (tmp && btrfs_buffer_uptodate(tmp, gen)) { + *eb_ret = tmp; + return 0; + } + free_extent_buffer(tmp); + btrfs_release_path(NULL, p); + return -EIO; + } } /* @@ -1596,8 +1609,7 @@ read_block_for_search(struct btrfs_trans_handle *trans, btrfs_unlock_up_safe(p, level + 1); btrfs_set_path_blocking(p); - if (tmp) - free_extent_buffer(tmp); + free_extent_buffer(tmp); if (p->reada) reada_for_search(root, p, level, slot, key->objectid); @@ -2548,7 +2560,6 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, { struct btrfs_disk_key disk_key; struct extent_buffer *right = path->nodes[0]; - int slot; int i; int push_space = 0; int push_items = 0; @@ -2560,8 +2571,6 @@ static noinline int __push_leaf_left(struct btrfs_trans_handle *trans, u32 this_item_size; u32 old_left_item_size; - slot = path->slots[1]; - if (empty) nr = min(right_nritems, max_slot); else @@ -3330,7 +3339,6 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, { int ret = 0; int slot; - int slot_orig; struct extent_buffer *leaf; struct btrfs_item *item; u32 nritems; @@ -3340,7 +3348,6 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, unsigned int size_diff; int i; - slot_orig = path->slots[0]; leaf = path->nodes[0]; slot = path->slots[0]; @@ -3445,7 +3452,6 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, { int ret = 0; int slot; - int slot_orig; struct extent_buffer *leaf; struct btrfs_item *item; u32 nritems; @@ -3454,7 +3460,6 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, unsigned int old_size; int i; - slot_orig = path->slots[0]; leaf = path->nodes[0]; nritems = btrfs_header_nritems(leaf); @@ -3787,7 +3792,6 @@ int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, struct btrfs_key *cpu_key, u32 *data_size, int nr) { - struct extent_buffer *leaf; int ret = 0; int slot; int i; @@ -3804,7 +3808,6 @@ int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, if (ret < 0) goto out; - leaf = path->nodes[0]; slot = path->slots[0]; BUG_ON(slot < 0); diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index eaf286a..a142d20 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -99,6 +99,9 @@ struct btrfs_ordered_sum; */ #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL +/* For storing free space cache */ +#define BTRFS_FREE_SPACE_OBJECTID -11ULL + /* dummy objectid represents multiple objectids */ #define BTRFS_MULTIPLE_OBJECTIDS -255ULL @@ -265,6 +268,22 @@ struct btrfs_chunk { /* additional stripes go here */ } __attribute__ ((__packed__)); +#define BTRFS_FREE_SPACE_EXTENT 1 +#define BTRFS_FREE_SPACE_BITMAP 2 + +struct btrfs_free_space_entry { + __le64 offset; + __le64 bytes; + u8 type; +} __attribute__ ((__packed__)); + +struct btrfs_free_space_header { + struct btrfs_disk_key location; + __le64 generation; + __le64 num_entries; + __le64 num_bitmaps; +} __attribute__ ((__packed__)); + static inline unsigned long btrfs_chunk_item_size(int num_stripes) { BUG_ON(num_stripes == 0); @@ -365,8 +384,10 @@ struct btrfs_super_block { char label[BTRFS_LABEL_SIZE]; + __le64 cache_generation; + /* future expansion */ - __le64 reserved[32]; + __le64 reserved[31]; u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; } __attribute__ ((__packed__)); @@ -375,13 +396,15 @@ struct btrfs_super_block { * ones specified below then we will fail to mount */ #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) -#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0) +#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) +#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) #define BTRFS_FEATURE_COMPAT_SUPP 0ULL #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL -#define BTRFS_FEATURE_INCOMPAT_SUPP \ - (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ - BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL) +#define BTRFS_FEATURE_INCOMPAT_SUPP \ + (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ + BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ + BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) /* * A leaf is full of items. offset and size tell us where to find @@ -675,7 +698,8 @@ struct btrfs_block_group_item { struct btrfs_space_info { u64 flags; - u64 total_bytes; /* total bytes in the space */ + u64 total_bytes; /* total bytes in the space, + this doesn't take mirrors into account */ u64 bytes_used; /* total bytes used, this does't take mirrors into account */ u64 bytes_pinned; /* total bytes pinned, will be freed when the @@ -687,6 +711,8 @@ struct btrfs_space_info { u64 bytes_may_use; /* number of bytes that may be used for delalloc/allocations */ u64 disk_used; /* total bytes used on disk */ + u64 disk_total; /* total bytes on disk, takes mirrors into + account */ int full; /* indicates that we cannot allocate any more chunks for this space */ @@ -750,6 +776,14 @@ enum btrfs_caching_type { BTRFS_CACHE_FINISHED = 2, }; +enum btrfs_disk_cache_state { + BTRFS_DC_WRITTEN = 0, + BTRFS_DC_ERROR = 1, + BTRFS_DC_CLEAR = 2, + BTRFS_DC_SETUP = 3, + BTRFS_DC_NEED_WRITE = 4, +}; + struct btrfs_caching_control { struct list_head list; struct mutex mutex; @@ -763,6 +797,7 @@ struct btrfs_block_group_cache { struct btrfs_key key; struct btrfs_block_group_item item; struct btrfs_fs_info *fs_info; + struct inode *inode; spinlock_t lock; u64 pinned; u64 reserved; @@ -773,8 +808,11 @@ struct btrfs_block_group_cache { int extents_thresh; int free_extents; int total_bitmaps; - int ro; - int dirty; + unsigned int ro:1; + unsigned int dirty:1; + unsigned int iref:1; + + int disk_cache_state; /* cache tracking stuff */ int cached; @@ -863,6 +901,7 @@ struct btrfs_fs_info { struct btrfs_transaction *running_transaction; wait_queue_head_t transaction_throttle; wait_queue_head_t transaction_wait; + wait_queue_head_t transaction_blocked_wait; wait_queue_head_t async_submit_wait; struct btrfs_super_block super_copy; @@ -949,6 +988,7 @@ struct btrfs_fs_info { struct btrfs_workers endio_meta_workers; struct btrfs_workers endio_meta_write_workers; struct btrfs_workers endio_write_workers; + struct btrfs_workers endio_freespace_worker; struct btrfs_workers submit_workers; /* * fixup workers take dirty pages that didn't properly go through @@ -1192,6 +1232,9 @@ struct btrfs_root { #define BTRFS_MOUNT_NOSSD (1 << 9) #define BTRFS_MOUNT_DISCARD (1 << 10) #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) +#define BTRFS_MOUNT_SPACE_CACHE (1 << 12) +#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) +#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) @@ -1665,6 +1708,27 @@ static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, write_eb_member(eb, item, struct btrfs_dir_item, location, key); } +BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, + num_entries, 64); +BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, + num_bitmaps, 64); +BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, + generation, 64); + +static inline void btrfs_free_space_key(struct extent_buffer *eb, + struct btrfs_free_space_header *h, + struct btrfs_disk_key *key) +{ + read_eb_member(eb, h, struct btrfs_free_space_header, location, key); +} + +static inline void btrfs_set_free_space_key(struct extent_buffer *eb, + struct btrfs_free_space_header *h, + struct btrfs_disk_key *key) +{ + write_eb_member(eb, h, struct btrfs_free_space_header, location, key); +} + /* struct btrfs_disk_key */ BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, objectid, 64); @@ -1876,6 +1940,8 @@ BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, incompat_flags, 64); BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, csum_type, 16); +BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, + cache_generation, 64); static inline int btrfs_super_csum_size(struct btrfs_super_block *s) { @@ -1988,6 +2054,12 @@ static inline struct dentry *fdentry(struct file *file) return file->f_path.dentry; } +static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) +{ + return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && + (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); +} + /* extent-tree.c */ void btrfs_put_block_group(struct btrfs_block_group_cache *cache); int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, @@ -2079,7 +2151,7 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes); void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans, struct btrfs_root *root, - int num_items, int *retries); + int num_items); void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, @@ -2100,7 +2172,7 @@ void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info, int btrfs_block_rsv_add(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, - u64 num_bytes, int *retries); + u64 num_bytes); int btrfs_block_rsv_check(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, @@ -2115,6 +2187,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root, struct btrfs_block_group_cache *cache); int btrfs_set_block_group_rw(struct btrfs_root *root, struct btrfs_block_group_cache *cache); +void btrfs_put_block_group_cache(struct btrfs_fs_info *info); /* ctree.c */ int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, int level, int *slot); @@ -2373,7 +2446,8 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, u32 min_type); int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); -int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput); +int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput, + int sync); int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, struct extent_state **cached_state); int btrfs_writepages(struct address_space *mapping, @@ -2426,6 +2500,10 @@ void btrfs_run_delayed_iputs(struct btrfs_root *root); int btrfs_prealloc_file_range(struct inode *inode, int mode, u64 start, u64 num_bytes, u64 min_size, loff_t actual_len, u64 *alloc_hint); +int btrfs_prealloc_file_range_trans(struct inode *inode, + struct btrfs_trans_handle *trans, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint); extern const struct dentry_operations btrfs_dentry_operations; /* ioctl.c */ @@ -2466,7 +2544,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait); /* acl.c */ #ifdef CONFIG_BTRFS_FS_POSIX_ACL -int btrfs_check_acl(struct inode *inode, int mask); +int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags); #else #define btrfs_check_acl NULL #endif diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index e9103b3..f0cad5a 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -427,5 +427,5 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, ret = btrfs_truncate_item(trans, root, path, item_len - sub_item_len, 1); } - return 0; + return ret; } diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 5e789f4..51d2e4d 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -28,6 +28,7 @@ #include <linux/freezer.h> #include <linux/crc32c.h> #include <linux/slab.h> +#include <linux/migrate.h> #include "compat.h" #include "ctree.h" #include "disk-io.h" @@ -338,7 +339,6 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) struct extent_io_tree *tree; u64 start = (u64)page->index << PAGE_CACHE_SHIFT; u64 found_start; - int found_level; unsigned long len; struct extent_buffer *eb; int ret; @@ -356,6 +356,8 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE, btrfs_header_generation(eb)); BUG_ON(ret); + WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN)); + found_start = btrfs_header_bytenr(eb); if (found_start != start) { WARN_ON(1); @@ -369,8 +371,6 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) WARN_ON(1); goto err; } - found_level = btrfs_header_level(eb); - csum_tree_block(root, eb, 0); err: free_extent_buffer(eb); @@ -481,9 +481,12 @@ static void end_workqueue_bio(struct bio *bio, int err) end_io_wq->work.flags = 0; if (bio->bi_rw & REQ_WRITE) { - if (end_io_wq->metadata) + if (end_io_wq->metadata == 1) btrfs_queue_worker(&fs_info->endio_meta_write_workers, &end_io_wq->work); + else if (end_io_wq->metadata == 2) + btrfs_queue_worker(&fs_info->endio_freespace_worker, + &end_io_wq->work); else btrfs_queue_worker(&fs_info->endio_write_workers, &end_io_wq->work); @@ -497,6 +500,13 @@ static void end_workqueue_bio(struct bio *bio, int err) } } +/* + * For the metadata arg you want + * + * 0 - if data + * 1 - if normal metadta + * 2 - if writing to the free space cache area + */ int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, int metadata) { @@ -533,11 +543,9 @@ int btrfs_congested_async(struct btrfs_fs_info *info, int iodone) static void run_one_async_start(struct btrfs_work *work) { - struct btrfs_fs_info *fs_info; struct async_submit_bio *async; async = container_of(work, struct async_submit_bio, work); - fs_info = BTRFS_I(async->inode)->root->fs_info; async->submit_bio_start(async->inode, async->rw, async->bio, async->mirror_num, async->bio_flags, async->bio_offset); @@ -688,6 +696,27 @@ static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, __btree_submit_bio_done); } +#ifdef CONFIG_MIGRATION +static int btree_migratepage(struct address_space *mapping, + struct page *newpage, struct page *page) +{ + /* + * we can't safely write a btree page from here, + * we haven't done the locking hook + */ + if (PageDirty(page)) + return -EAGAIN; + /* + * Buffers may be managed in a filesystem specific way. + * We must have no buffers or drop them. + */ + if (page_has_private(page) && + !try_to_release_page(page, GFP_KERNEL)) + return -EAGAIN; + return migrate_page(mapping, newpage, page); +} +#endif + static int btree_writepage(struct page *page, struct writeback_control *wbc) { struct extent_io_tree *tree; @@ -702,8 +731,7 @@ static int btree_writepage(struct page *page, struct writeback_control *wbc) } redirty_page_for_writepage(wbc, page); - eb = btrfs_find_tree_block(root, page_offset(page), - PAGE_CACHE_SIZE); + eb = btrfs_find_tree_block(root, page_offset(page), PAGE_CACHE_SIZE); WARN_ON(!eb); was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags); @@ -794,6 +822,9 @@ static const struct address_space_operations btree_aops = { .releasepage = btree_releasepage, .invalidatepage = btree_invalidatepage, .sync_page = block_sync_page, +#ifdef CONFIG_MIGRATION + .migratepage = btree_migratepage, +#endif }; int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, @@ -850,12 +881,8 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 parent_transid) { struct extent_buffer *buf = NULL; - struct inode *btree_inode = root->fs_info->btree_inode; - struct extent_io_tree *io_tree; int ret; - io_tree = &BTRFS_I(btree_inode)->io_tree; - buf = btrfs_find_create_tree_block(root, bytenr, blocksize); if (!buf) return NULL; @@ -980,7 +1007,10 @@ static int find_and_setup_root(struct btrfs_root *tree_root, blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item)); root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item), blocksize, generation); - BUG_ON(!root->node); + if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) { + free_extent_buffer(root->node); + return -EIO; + } root->commit_root = btrfs_root_node(root); return 0; } @@ -1377,7 +1407,6 @@ static int bio_ready_for_csum(struct bio *bio) u64 start = 0; struct page *page; struct extent_io_tree *io_tree = NULL; - struct btrfs_fs_info *info = NULL; struct bio_vec *bvec; int i; int ret; @@ -1396,7 +1425,6 @@ static int bio_ready_for_csum(struct bio *bio) buf_len = page->private >> 2; start = page_offset(page) + bvec->bv_offset; io_tree = &BTRFS_I(page->mapping->host)->io_tree; - info = BTRFS_I(page->mapping->host)->root->fs_info; } /* are we fully contained in this bio? */ if (buf_len <= length) @@ -1539,10 +1567,8 @@ struct btrfs_root *open_ctree(struct super_block *sb, GFP_NOFS); struct btrfs_root *csum_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS); - struct btrfs_root *tree_root = kzalloc(sizeof(struct btrfs_root), - GFP_NOFS); - struct btrfs_fs_info *fs_info = kzalloc(sizeof(*fs_info), - GFP_NOFS); + struct btrfs_root *tree_root = btrfs_sb(sb); + struct btrfs_fs_info *fs_info = tree_root->fs_info; struct btrfs_root *chunk_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS); struct btrfs_root *dev_root = kzalloc(sizeof(struct btrfs_root), @@ -1680,12 +1706,12 @@ struct btrfs_root *open_ctree(struct super_block *sb, init_waitqueue_head(&fs_info->transaction_throttle); init_waitqueue_head(&fs_info->transaction_wait); + init_waitqueue_head(&fs_info->transaction_blocked_wait); init_waitqueue_head(&fs_info->async_submit_wait); __setup_root(4096, 4096, 4096, 4096, tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID); - bh = btrfs_read_dev_super(fs_devices->latest_bdev); if (!bh) goto fail_iput; @@ -1775,6 +1801,8 @@ struct btrfs_root *open_ctree(struct super_block *sb, btrfs_init_workers(&fs_info->endio_write_workers, "endio-write", fs_info->thread_pool_size, &fs_info->generic_worker); + btrfs_init_workers(&fs_info->endio_freespace_worker, "freespace-write", + 1, &fs_info->generic_worker); /* * endios are largely parallel and should have a very @@ -1795,6 +1823,7 @@ struct btrfs_root *open_ctree(struct super_block *sb, btrfs_start_workers(&fs_info->endio_meta_workers, 1); btrfs_start_workers(&fs_info->endio_meta_write_workers, 1); btrfs_start_workers(&fs_info->endio_write_workers, 1); + btrfs_start_workers(&fs_info->endio_freespace_worker, 1); fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, @@ -1993,6 +2022,7 @@ struct btrfs_root *open_ctree(struct super_block *sb, if (!(sb->s_flags & MS_RDONLY)) { down_read(&fs_info->cleanup_work_sem); btrfs_orphan_cleanup(fs_info->fs_root); + btrfs_orphan_cleanup(fs_info->tree_root); up_read(&fs_info->cleanup_work_sem); } @@ -2035,6 +2065,7 @@ fail_sb_buffer: btrfs_stop_workers(&fs_info->endio_meta_workers); btrfs_stop_workers(&fs_info->endio_meta_write_workers); btrfs_stop_workers(&fs_info->endio_write_workers); + btrfs_stop_workers(&fs_info->endio_freespace_worker); btrfs_stop_workers(&fs_info->submit_workers); fail_iput: invalidate_inode_pages2(fs_info->btree_inode->i_mapping); @@ -2410,6 +2441,7 @@ int close_ctree(struct btrfs_root *root) fs_info->closing = 1; smp_mb(); + btrfs_put_block_group_cache(fs_info); if (!(fs_info->sb->s_flags & MS_RDONLY)) { ret = btrfs_commit_super(root); if (ret) @@ -2456,6 +2488,7 @@ int close_ctree(struct btrfs_root *root) btrfs_stop_workers(&fs_info->endio_meta_workers); btrfs_stop_workers(&fs_info->endio_meta_write_workers); btrfs_stop_workers(&fs_info->endio_write_workers); + btrfs_stop_workers(&fs_info->endio_freespace_worker); btrfs_stop_workers(&fs_info->submit_workers); btrfs_close_devices(fs_info->fs_devices); diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 951ef09..0ccf9a8 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -110,7 +110,7 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid, dentry = d_obtain_alias(inode); if (!IS_ERR(dentry)) - dentry->d_op = &btrfs_dentry_operations; + d_set_d_op(dentry, &btrfs_dentry_operations); return dentry; fail: srcu_read_unlock(&fs_info->subvol_srcu, index); @@ -166,7 +166,7 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh, static struct dentry *btrfs_get_parent(struct dentry *child) { struct inode *dir = child->d_inode; - static struct dentry *dentry; + struct dentry *dentry; struct btrfs_root *root = BTRFS_I(dir)->root; struct btrfs_path *path; struct extent_buffer *leaf; @@ -225,16 +225,92 @@ static struct dentry *btrfs_get_parent(struct dentry *child) key.offset = 0; dentry = d_obtain_alias(btrfs_iget(root->fs_info->sb, &key, root, NULL)); if (!IS_ERR(dentry)) - dentry->d_op = &btrfs_dentry_operations; + d_set_d_op(dentry, &btrfs_dentry_operations); return dentry; fail: btrfs_free_path(path); return ERR_PTR(ret); } +static int btrfs_get_name(struct dentry *parent, char *name, + struct dentry *child) +{ + struct inode *inode = child->d_inode; + struct inode *dir = parent->d_inode; + struct btrfs_path *path; + struct btrfs_root *root = BTRFS_I(dir)->root; + struct btrfs_inode_ref *iref; + struct btrfs_root_ref *rref; + struct extent_buffer *leaf; + unsigned long name_ptr; + struct btrfs_key key; + int name_len; + int ret; + + if (!dir || !inode) + return -EINVAL; + + if (!S_ISDIR(dir->i_mode)) + return -EINVAL; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + path->leave_spinning = 1; + + if (inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) { + key.objectid = BTRFS_I(inode)->root->root_key.objectid; + key.type = BTRFS_ROOT_BACKREF_KEY; + key.offset = (u64)-1; + root = root->fs_info->tree_root; + } else { + key.objectid = inode->i_ino; + key.offset = dir->i_ino; + key.type = BTRFS_INODE_REF_KEY; + } + + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + if (ret < 0) { + btrfs_free_path(path); + return ret; + } else if (ret > 0) { + if (inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) { + path->slots[0]--; + } else { + btrfs_free_path(path); + return -ENOENT; + } + } + leaf = path->nodes[0]; + + if (inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) { + rref = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_root_ref); + name_ptr = (unsigned long)(rref + 1); + name_len = btrfs_root_ref_name_len(leaf, rref); + } else { + iref = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_inode_ref); + name_ptr = (unsigned long)(iref + 1); + name_len = btrfs_inode_ref_name_len(leaf, iref); + } + + read_extent_buffer(leaf, name, name_ptr, name_len); + btrfs_free_path(path); + + /* + * have to add the null termination to make sure that reconnect_path + * gets the right len for strlen + */ + name[name_len] = '\0'; + + return 0; +} + const struct export_operations btrfs_export_ops = { .encode_fh = btrfs_encode_fh, .fh_to_dentry = btrfs_fh_to_dentry, .fh_to_parent = btrfs_fh_to_parent, .get_parent = btrfs_get_parent, + .get_name = btrfs_get_name, }; diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 0b81ecd..227e581 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -242,6 +242,12 @@ get_caching_control(struct btrfs_block_group_cache *cache) return NULL; } + /* We're loading it the fast way, so we don't have a caching_ctl. */ + if (!cache->caching_ctl) { + spin_unlock(&cache->lock); + return NULL; + } + ctl = cache->caching_ctl; atomic_inc(&ctl->count); spin_unlock(&cache->lock); @@ -421,7 +427,10 @@ err: return 0; } -static int cache_block_group(struct btrfs_block_group_cache *cache) +static int cache_block_group(struct btrfs_block_group_cache *cache, + struct btrfs_trans_handle *trans, + struct btrfs_root *root, + int load_cache_only) { struct btrfs_fs_info *fs_info = cache->fs_info; struct btrfs_caching_control *caching_ctl; @@ -432,6 +441,39 @@ static int cache_block_group(struct btrfs_block_group_cache *cache) if (cache->cached != BTRFS_CACHE_NO) return 0; + /* + * We can't do the read from on-disk cache during a commit since we need + * to have the normal tree locking. Also if we are currently trying to + * allocate blocks for the tree root we can't do the fast caching since + * we likely hold important locks. + */ + if (!trans->transaction->in_commit && + (root && root != root->fs_info->tree_root)) { + spin_lock(&cache->lock); + if (cache->cached != BTRFS_CACHE_NO) { + spin_unlock(&cache->lock); + return 0; + } + cache->cached = BTRFS_CACHE_STARTED; + spin_unlock(&cache->lock); + + ret = load_free_space_cache(fs_info, cache); + + spin_lock(&cache->lock); + if (ret == 1) { + cache->cached = BTRFS_CACHE_FINISHED; + cache->last_byte_to_unpin = (u64)-1; + } else { + cache->cached = BTRFS_CACHE_NO; + } + spin_unlock(&cache->lock); + if (ret == 1) + return 0; + } + + if (load_cache_only) + return 0; + caching_ctl = kzalloc(sizeof(*caching_ctl), GFP_KERNEL); BUG_ON(!caching_ctl); @@ -509,7 +551,7 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info, rcu_read_lock(); list_for_each_entry_rcu(found, head, list) { - if (found->flags == flags) { + if (found->flags & flags) { rcu_read_unlock(); return found; } @@ -542,6 +584,15 @@ static u64 div_factor(u64 num, int factor) return num; } +static u64 div_factor_fine(u64 num, int factor) +{ + if (factor == 100) + return num; + num *= factor; + do_div(num, 100); + return num; +} + u64 btrfs_find_block_group(struct btrfs_root *root, u64 search_start, u64 search_hint, int owner) { @@ -2687,6 +2738,111 @@ next_block_group(struct btrfs_root *root, return cache; } +static int cache_save_setup(struct btrfs_block_group_cache *block_group, + struct btrfs_trans_handle *trans, + struct btrfs_path *path) +{ + struct btrfs_root *root = block_group->fs_info->tree_root; + struct inode *inode = NULL; + u64 alloc_hint = 0; + int dcs = BTRFS_DC_ERROR; + int num_pages = 0; + int retries = 0; + int ret = 0; + + /* + * If this block group is smaller than 100 megs don't bother caching the + * block group. + */ + if (block_group->key.offset < (100 * 1024 * 1024)) { + spin_lock(&block_group->lock); + block_group->disk_cache_state = BTRFS_DC_WRITTEN; + spin_unlock(&block_group->lock); + return 0; + } + +again: + inode = lookup_free_space_inode(root, block_group, path); + if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) { + ret = PTR_ERR(inode); + btrfs_release_path(root, path); + goto out; + } + + if (IS_ERR(inode)) { + BUG_ON(retries); + retries++; + + if (block_group->ro) + goto out_free; + + ret = create_free_space_inode(root, trans, block_group, path); + if (ret) + goto out_free; + goto again; + } + + /* + * We want to set the generation to 0, that way if anything goes wrong + * from here on out we know not to trust this cache when we load up next + * time. + */ + BTRFS_I(inode)->generation = 0; + ret = btrfs_update_inode(trans, root, inode); + WARN_ON(ret); + + if (i_size_read(inode) > 0) { + ret = btrfs_truncate_free_space_cache(root, trans, path, + inode); + if (ret) + goto out_put; + } + + spin_lock(&block_group->lock); + if (block_group->cached != BTRFS_CACHE_FINISHED) { + /* We're not cached, don't bother trying to write stuff out */ + dcs = BTRFS_DC_WRITTEN; + spin_unlock(&block_group->lock); + goto out_put; + } + spin_unlock(&block_group->lock); + + num_pages = (int)div64_u64(block_group->key.offset, 1024 * 1024 * 1024); + if (!num_pages) + num_pages = 1; + + /* + * Just to make absolutely sure we have enough space, we're going to + * preallocate 12 pages worth of space for each block group. In + * practice we ought to use at most 8, but we need extra space so we can + * add our header and have a terminator between the extents and the + * bitmaps. + */ + num_pages *= 16; + num_pages *= PAGE_CACHE_SIZE; + + ret = btrfs_check_data_free_space(inode, num_pages); + if (ret) + goto out_put; + + ret = btrfs_prealloc_file_range_trans(inode, trans, 0, 0, num_pages, + num_pages, num_pages, + &alloc_hint); + if (!ret) + dcs = BTRFS_DC_SETUP; + btrfs_free_reserved_data_space(inode, num_pages); +out_put: + iput(inode); +out_free: + btrfs_release_path(root, path); +out: + spin_lock(&block_group->lock); + block_group->disk_cache_state = dcs; + spin_unlock(&block_group->lock); + + return ret; +} + int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, struct btrfs_root *root) { @@ -2699,6 +2855,25 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, if (!path) return -ENOMEM; +again: + while (1) { + cache = btrfs_lookup_first_block_group(root->fs_info, last); + while (cache) { + if (cache->disk_cache_state == BTRFS_DC_CLEAR) + break; + cache = next_block_group(root, cache); + } + if (!cache) { + if (last == 0) + break; + last = 0; + continue; + } + err = cache_save_setup(cache, trans, path); + last = cache->key.objectid + cache->key.offset; + btrfs_put_block_group(cache); + } + while (1) { if (last == 0) { err = btrfs_run_delayed_refs(trans, root, @@ -2708,6 +2883,11 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, cache = btrfs_lookup_first_block_group(root->fs_info, last); while (cache) { + if (cache->disk_cache_state == BTRFS_DC_CLEAR) { + btrfs_put_block_group(cache); + goto again; + } + if (cache->dirty) break; cache = next_block_group(root, cache); @@ -2719,6 +2899,8 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, continue; } + if (cache->disk_cache_state == BTRFS_DC_SETUP) + cache->disk_cache_state = BTRFS_DC_NEED_WRITE; cache->dirty = 0; last = cache->key.objectid + cache->key.offset; @@ -2727,6 +2909,52 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, btrfs_put_block_group(cache); } + while (1) { + /* + * I don't think this is needed since we're just marking our + * preallocated extent as written, but just in case it can't + * hurt. + */ + if (last == 0) { + err = btrfs_run_delayed_refs(trans, root, + (unsigned long)-1); + BUG_ON(err); + } + + cache = btrfs_lookup_first_block_group(root->fs_info, last); + while (cache) { + /* + * Really this shouldn't happen, but it could if we + * couldn't write the entire preallocated extent and + * splitting the extent resulted in a new block. + */ + if (cache->dirty) { + btrfs_put_block_group(cache); + goto again; + } + if (cache->disk_cache_state == BTRFS_DC_NEED_WRITE) + break; + cache = next_block_group(root, cache); + } + if (!cache) { + if (last == 0) + break; + last = 0; + continue; + } + + btrfs_write_out_cache(root, trans, cache, path); + + /* + * If we didn't have an error then the cache state is still + * NEED_WRITE, so we can set it to WRITTEN. + */ + if (cache->disk_cache_state == BTRFS_DC_NEED_WRITE) + cache->disk_cache_state = BTRFS_DC_WRITTEN; + last = cache->key.objectid + cache->key.offset; + btrfs_put_block_group(cache); + } + btrfs_free_path(path); return 0; } @@ -2762,6 +2990,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, if (found) { spin_lock(&found->lock); found->total_bytes += total_bytes; + found->disk_total += total_bytes * factor; found->bytes_used += bytes_used; found->disk_used += bytes_used * factor; found->full = 0; @@ -2781,6 +3010,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, BTRFS_BLOCK_GROUP_SYSTEM | BTRFS_BLOCK_GROUP_METADATA); found->total_bytes = total_bytes; + found->disk_total = total_bytes * factor; found->bytes_used = bytes_used; found->disk_used = bytes_used * factor; found->bytes_pinned = 0; @@ -2813,7 +3043,13 @@ static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags) { - u64 num_devices = root->fs_info->fs_devices->rw_devices; + /* + * we add in the count of missing devices because we want + * to make sure that any RAID levels on a degraded FS + * continue to be honored. + */ + u64 num_devices = root->fs_info->fs_devices->rw_devices + + root->fs_info->fs_devices->missing_devices; if (num_devices == 1) flags &= ~(BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID0); @@ -2882,11 +3118,16 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes) struct btrfs_space_info *data_sinfo; struct btrfs_root *root = BTRFS_I(inode)->root; u64 used; - int ret = 0, committed = 0; + int ret = 0, committed = 0, alloc_chunk = 1; /* make sure bytes are sectorsize aligned */ bytes = (bytes + root->sectorsize - 1) & ~((u64)root->sectorsize - 1); + if (root == root->fs_info->tree_root) { + alloc_chunk = 0; + committed = 1; + } + data_sinfo = BTRFS_I(inode)->space_info; if (!data_sinfo) goto alloc; @@ -2905,7 +3146,7 @@ again: * if we don't have enough free bytes in this space then we need * to alloc a new chunk. */ - if (!data_sinfo->full) { + if (!data_sinfo->full && alloc_chunk) { u64 alloc_target; data_sinfo->force_alloc = 1; @@ -2997,10 +3238,11 @@ static void force_metadata_allocation(struct btrfs_fs_info *info) rcu_read_unlock(); } -static int should_alloc_chunk(struct btrfs_space_info *sinfo, - u64 alloc_bytes) +static int should_alloc_chunk(struct btrfs_root *root, + struct btrfs_space_info *sinfo, u64 alloc_bytes) { u64 num_bytes = sinfo->total_bytes - sinfo->bytes_readonly; + u64 thresh; if (sinfo->bytes_used + sinfo->bytes_reserved + alloc_bytes + 256 * 1024 * 1024 < num_bytes) @@ -3010,6 +3252,12 @@ static int should_alloc_chunk(struct btrfs_space_info *sinfo, alloc_bytes < div_factor(num_bytes, 8)) return 0; + thresh = btrfs_super_total_bytes(&root->fs_info->super_copy); + thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 5)); + + if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 3)) + return 0; + return 1; } @@ -3041,13 +3289,21 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, goto out; } - if (!force && !should_alloc_chunk(space_info, alloc_bytes)) { + if (!force && !should_alloc_chunk(extent_root, space_info, + alloc_bytes)) { spin_unlock(&space_info->lock); goto out; } spin_unlock(&space_info->lock); /* + * If we have mixed data/metadata chunks we want to make sure we keep + * allocating mixed chunks instead of individual chunks. + */ + if (btrfs_mixed_space_info(space_info)) + flags |= (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA); + + /* * if we're doing a data chunk, go ahead and make sure that * we keep a reasonable number of metadata chunks allocated in the * FS as well. @@ -3072,55 +3328,25 @@ out: return ret; } -static int maybe_allocate_chunk(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_space_info *sinfo, u64 num_bytes) -{ - int ret; - int end_trans = 0; - - if (sinfo->full) - return 0; - - spin_lock(&sinfo->lock); - ret = should_alloc_chunk(sinfo, num_bytes + 2 * 1024 * 1024); - spin_unlock(&sinfo->lock); - if (!ret) - return 0; - - if (!trans) { - trans = btrfs_join_transaction(root, 1); - BUG_ON(IS_ERR(trans)); - end_trans = 1; - } - - ret = do_chunk_alloc(trans, root->fs_info->extent_root, - num_bytes + 2 * 1024 * 1024, - get_alloc_profile(root, sinfo->flags), 0); - - if (end_trans) - btrfs_end_transaction(trans, root); - - return ret == 1 ? 1 : 0; -} - /* * shrink metadata reservation for delalloc */ static int shrink_delalloc(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 to_reclaim) + struct btrfs_root *root, u64 to_reclaim, int sync) { struct btrfs_block_rsv *block_rsv; + struct btrfs_space_info *space_info; u64 reserved; u64 max_reclaim; u64 reclaimed = 0; int pause = 1; - int ret; + int nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT; block_rsv = &root->fs_info->delalloc_block_rsv; - spin_lock(&block_rsv->lock); - reserved = block_rsv->reserved; - spin_unlock(&block_rsv->lock); + space_info = block_rsv->space_info; + + smp_mb(); + reserved = space_info->bytes_reserved; if (reserved == 0) return 0; @@ -3128,104 +3354,169 @@ static int shrink_delalloc(struct btrfs_trans_handle *trans, max_reclaim = min(reserved, to_reclaim); while (1) { - ret = btrfs_start_one_delalloc_inode(root, trans ? 1 : 0); - if (!ret) { - __set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(pause); - pause <<= 1; - if (pause > HZ / 10) - pause = HZ / 10; - } else { - pause = 1; - } + /* have the flusher threads jump in and do some IO */ + smp_mb(); + nr_pages = min_t(unsigned long, nr_pages, + root->fs_info->delalloc_bytes >> PAGE_CACHE_SHIFT); + writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages); - spin_lock(&block_rsv->lock); - if (reserved > block_rsv->reserved) - reclaimed = reserved - block_rsv->reserved; - reserved = block_rsv->reserved; - spin_unlock(&block_rsv->lock); + spin_lock(&space_info->lock); + if (reserved > space_info->bytes_reserved) + reclaimed += reserved - space_info->bytes_reserved; + reserved = space_info->bytes_reserved; + spin_unlock(&space_info->lock); if (reserved == 0 || reclaimed >= max_reclaim) break; if (trans && trans->transaction->blocked) return -EAGAIN; + + __set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(pause); + pause <<= 1; + if (pause > HZ / 10) + pause = HZ / 10; + } return reclaimed >= to_reclaim; } -static int should_retry_reserve(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct btrfs_block_rsv *block_rsv, - u64 num_bytes, int *retries) +/* + * Retries tells us how many times we've called reserve_metadata_bytes. The + * idea is if this is the first call (retries == 0) then we will add to our + * reserved count if we can't make the allocation in order to hold our place + * while we go and try and free up space. That way for retries > 1 we don't try + * and add space, we just check to see if the amount of unused space is >= the + * total space, meaning that our reservation is valid. + * + * However if we don't intend to retry this reservation, pass -1 as retries so + * that it short circuits this logic. + */ +static int reserve_metadata_bytes(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_block_rsv *block_rsv, + u64 orig_bytes, int flush) { struct btrfs_space_info *space_info = block_rsv->space_info; - int ret; + u64 unused; + u64 num_bytes = orig_bytes; + int retries = 0; + int ret = 0; + bool reserved = false; + bool committed = false; - if ((*retries) > 2) - return -ENOSPC; +again: + ret = -ENOSPC; + if (reserved) + num_bytes = 0; - ret = maybe_allocate_chunk(trans, root, space_info, num_bytes); - if (ret) - return 1; + spin_lock(&space_info->lock); + unused = space_info->bytes_used + space_info->bytes_reserved + + space_info->bytes_pinned + space_info->bytes_readonly + + space_info->bytes_may_use; - if (trans && trans->transaction->in_commit) - return -ENOSPC; + /* + * The idea here is that we've not already over-reserved the block group + * then we can go ahead and save our reservation first and then start + * flushing if we need to. Otherwise if we've already overcommitted + * lets start flushing stuff first and then come back and try to make + * our reservation. + */ + if (unused <= space_info->total_bytes) { + unused = space_info->total_bytes - unused; + if (unused >= num_bytes) { + if (!reserved) + space_info->bytes_reserved += orig_bytes; + ret = 0; + } else { + /* + * Ok set num_bytes to orig_bytes since we aren't + * overocmmitted, this way we only try and reclaim what + * we need. + */ + num_bytes = orig_bytes; + } + } else { + /* + * Ok we're over committed, set num_bytes to the overcommitted + * amount plus the amount of bytes that we need for this + * reservation. + */ + num_bytes = unused - space_info->total_bytes + + (orig_bytes * (retries + 1)); + } - ret = shrink_delalloc(trans, root, num_bytes); - if (ret) - return ret; + /* + * Couldn't make our reservation, save our place so while we're trying + * to reclaim space we can actually use it instead of somebody else + * stealing it from us. + */ + if (ret && !reserved) { + space_info->bytes_reserved += orig_bytes; + reserved = true; + } - spin_lock(&space_info->lock); - if (space_info->bytes_pinned < num_bytes) - ret = 1; spin_unlock(&space_info->lock); - if (ret) - return -ENOSPC; - (*retries)++; - - if (trans) - return -EAGAIN; + if (!ret) + return 0; - trans = btrfs_join_transaction(root, 1); - BUG_ON(IS_ERR(trans)); - ret = btrfs_commit_transaction(trans, root); - BUG_ON(ret); + if (!flush) + goto out; - return 1; -} + /* + * We do synchronous shrinking since we don't actually unreserve + * metadata until after the IO is completed. + */ + ret = shrink_delalloc(trans, root, num_bytes, 1); + if (ret > 0) + return 0; + else if (ret < 0) + goto out; -static int reserve_metadata_bytes(struct btrfs_block_rsv *block_rsv, - u64 num_bytes) -{ - struct btrfs_space_info *space_info = block_rsv->space_info; - u64 unused; - int ret = -ENOSPC; + /* + * So if we were overcommitted it's possible that somebody else flushed + * out enough space and we simply didn't have enough space to reclaim, + * so go back around and try again. + */ + if (retries < 2) { + retries++; + goto again; + } spin_lock(&space_info->lock); - unused = space_info->bytes_used + space_info->bytes_reserved + - space_info->bytes_pinned + space_info->bytes_readonly; + /* + * Not enough space to be reclaimed, don't bother committing the + * transaction. + */ + if (space_info->bytes_pinned < orig_bytes) + ret = -ENOSPC; + spin_unlock(&space_info->lock); + if (ret) + goto out; - if (unused < space_info->total_bytes) - unused = space_info->total_bytes - unused; - else - unused = 0; + ret = -EAGAIN; + if (trans || committed) + goto out; - if (unused >= num_bytes) { - if (block_rsv->priority >= 10) { - space_info->bytes_reserved += num_bytes; - ret = 0; - } else { - if ((unused + block_rsv->reserved) * - block_rsv->priority >= - (num_bytes + block_rsv->reserved) * 10) { - space_info->bytes_reserved += num_bytes; - ret = 0; - } - } + ret = -ENOSPC; + trans = btrfs_join_transaction(root, 1); + if (IS_ERR(trans)) + goto out; + ret = btrfs_commit_transaction(trans, root); + if (!ret) { + trans = NULL; + committed = true; + goto again; + } + +out: + if (reserved) { + spin_lock(&space_info->lock); + space_info->bytes_reserved -= orig_bytes; + spin_unlock(&space_info->lock); } - spin_unlock(&space_info->lock); return ret; } @@ -3327,18 +3618,14 @@ struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root) { struct btrfs_block_rsv *block_rsv; struct btrfs_fs_info *fs_info = root->fs_info; - u64 alloc_target; block_rsv = kmalloc(sizeof(*block_rsv), GFP_NOFS); if (!block_rsv) return NULL; btrfs_init_block_rsv(block_rsv); - - alloc_target = btrfs_get_alloc_profile(root, 0); block_rsv->space_info = __find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA); - return block_rsv; } @@ -3369,23 +3656,19 @@ void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info, int btrfs_block_rsv_add(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_block_rsv *block_rsv, - u64 num_bytes, int *retries) + u64 num_bytes) { int ret; if (num_bytes == 0) return 0; -again: - ret = reserve_metadata_bytes(block_rsv, num_bytes); + + ret = reserve_metadata_bytes(trans, root, block_rsv, num_bytes, 1); if (!ret) { block_rsv_add_bytes(block_rsv, num_bytes, 1); return 0; } - ret = should_retry_reserve(trans, root, block_rsv, num_bytes, retries); - if (ret > 0) - goto again; - return ret; } @@ -3420,7 +3703,8 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans, return 0; if (block_rsv->refill_used) { - ret = reserve_metadata_bytes(block_rsv, num_bytes); + ret = reserve_metadata_bytes(trans, root, block_rsv, + num_bytes, 0); if (!ret) { block_rsv_add_bytes(block_rsv, num_bytes, 0); return 0; @@ -3499,6 +3783,8 @@ static u64 calc_global_metadata_size(struct btrfs_fs_info *fs_info) sinfo = __find_space_info(fs_info, BTRFS_BLOCK_GROUP_METADATA); spin_lock(&sinfo->lock); + if (sinfo->flags & BTRFS_BLOCK_GROUP_DATA) + data_used = 0; meta_used = sinfo->bytes_used; spin_unlock(&sinfo->lock); @@ -3526,7 +3812,8 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info) block_rsv->size = num_bytes; num_bytes = sinfo->bytes_used + sinfo->bytes_pinned + - sinfo->bytes_reserved + sinfo->bytes_readonly; + sinfo->bytes_reserved + sinfo->bytes_readonly + + sinfo->bytes_may_use; if (sinfo->total_bytes > num_bytes) { num_bytes = sinfo->total_bytes - num_bytes; @@ -3597,7 +3884,7 @@ static u64 calc_trans_metadata_size(struct btrfs_root *root, int num_items) int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans, struct btrfs_root *root, - int num_items, int *retries) + int num_items) { u64 num_bytes; int ret; @@ -3607,7 +3894,7 @@ int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans, num_bytes = calc_trans_metadata_size(root, num_items); ret = btrfs_block_rsv_add(trans, root, &root->fs_info->trans_block_rsv, - num_bytes, retries); + num_bytes); if (!ret) { trans->bytes_reserved += num_bytes; trans->block_rsv = &root->fs_info->trans_block_rsv; @@ -3681,14 +3968,13 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) struct btrfs_block_rsv *block_rsv = &root->fs_info->delalloc_block_rsv; u64 to_reserve; int nr_extents; - int retries = 0; int ret; if (btrfs_transaction_in_commit(root->fs_info)) schedule_timeout(1); num_bytes = ALIGN(num_bytes, root->sectorsize); -again: + spin_lock(&BTRFS_I(inode)->accounting_lock); nr_extents = atomic_read(&BTRFS_I(inode)->outstanding_extents) + 1; if (nr_extents > BTRFS_I(inode)->reserved_extents) { @@ -3698,18 +3984,14 @@ again: nr_extents = 0; to_reserve = 0; } + spin_unlock(&BTRFS_I(inode)->accounting_lock); to_reserve += calc_csum_metadata_size(inode, num_bytes); - ret = reserve_metadata_bytes(block_rsv, to_reserve); - if (ret) { - spin_unlock(&BTRFS_I(inode)->accounting_lock); - ret = should_retry_reserve(NULL, root, block_rsv, to_reserve, - &retries); - if (ret > 0) - goto again; + ret = reserve_metadata_bytes(NULL, root, block_rsv, to_reserve, 1); + if (ret) return ret; - } + spin_lock(&BTRFS_I(inode)->accounting_lock); BTRFS_I(inode)->reserved_extents += nr_extents; atomic_inc(&BTRFS_I(inode)->outstanding_extents); spin_unlock(&BTRFS_I(inode)->accounting_lock); @@ -3717,7 +3999,7 @@ again: block_rsv_add_bytes(block_rsv, to_reserve, 1); if (block_rsv->size > 512 * 1024 * 1024) - shrink_delalloc(NULL, root, to_reserve); + shrink_delalloc(NULL, root, to_reserve, 0); return 0; } @@ -3776,12 +4058,12 @@ static int update_block_group(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 bytenr, u64 num_bytes, int alloc) { - struct btrfs_block_group_cache *cache; + struct btrfs_block_group_cache *cache = NULL; struct btrfs_fs_info *info = root->fs_info; - int factor; u64 total = num_bytes; u64 old_val; u64 byte_in_group; + int factor; /* block accounting for super block */ spin_lock(&info->delalloc_lock); @@ -3803,11 +4085,25 @@ static int update_block_group(struct btrfs_trans_handle *trans, factor = 2; else factor = 1; + /* + * If this block group has free space cache written out, we + * need to make sure to load it if we are removing space. This + * is because we need the unpinning stage to actually add the + * space back to the block group, otherwise we will leak space. + */ + if (!alloc && cache->cached == BTRFS_CACHE_NO) + cache_block_group(cache, trans, NULL, 1); + byte_in_group = bytenr - cache->key.objectid; WARN_ON(byte_in_group > cache->key.offset); spin_lock(&cache->space_info->lock); spin_lock(&cache->lock); + + if (btrfs_super_cache_generation(&info->super_copy) != 0 && + cache->disk_cache_state < BTRFS_DC_CLEAR) + cache->disk_cache_state = BTRFS_DC_CLEAR; + cache->dirty = 1; old_val = btrfs_block_group_used(&cache->item); num_bytes = min(total, cache->key.offset - byte_in_group); @@ -4554,6 +4850,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, bool found_uncached_bg = false; bool failed_cluster_refill = false; bool failed_alloc = false; + bool use_cluster = true; u64 ideal_cache_percent = 0; u64 ideal_cache_offset = 0; @@ -4568,16 +4865,24 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans, return -ENOSPC; } + /* + * If the space info is for both data and metadata it means we have a + * small filesystem and we can't use the clustering stuff. + */ + if (btrfs_mixed_space_info(space_info)) + use_cluster = false; + if (orig_root->ref_cows || empty_size) allowed_chunk_alloc = 1; - if (data & BTRFS_BLOCK_GROUP_METADATA) { + if (data & BTRFS_BLOCK_GROUP_METADATA && use_cluster) { last_ptr = &root->fs_info->meta_alloc_cluster; if (!btrfs_test_opt(root, SSD)) empty_cluster = 64 * 1024; } - if ((data & BTRFS_BLOCK_GROUP_DATA) && btrfs_test_opt(root, SSD)) { + if ((data & BTRFS_BLOCK_GROUP_DATA) && use_cluster && + btrfs_test_opt(root, SSD)) { last_ptr = &root->fs_info->data_alloc_cluster; } @@ -4637,10 +4942,34 @@ search: btrfs_get_block_group(block_group); search_start = block_group->key.objectid; + /* + * this can happen if we end up cycling through all the + * raid types, but we want to make sure we only allocate + * for the proper type. + */ + if (!block_group_bits(block_group, data)) { + u64 extra = BTRFS_BLOCK_GROUP_DUP | + BTRFS_BLOCK_GROUP_RAID1 | + BTRFS_BLOCK_GROUP_RAID10; + + /* + * if they asked for extra copies and this block group + * doesn't provide them, bail. This does allow us to + * fill raid0 from raid1. + */ + if ((data & extra) && !(block_group->flags & extra)) + goto loop; + } + have_block_group: if (unlikely(block_group->cached == BTRFS_CACHE_NO)) { u64 free_percent; + ret = cache_block_group(block_group, trans, + orig_root, 1); + if (block_group->cached == BTRFS_CACHE_FINISHED) + goto have_block_group; + free_percent = btrfs_block_group_used(&block_group->item); free_percent *= 100; free_percent = div64_u64(free_percent, @@ -4661,7 +4990,8 @@ have_block_group: if (loop > LOOP_CACHING_NOWAIT || (loop > LOOP_FIND_IDEAL && atomic_read(&space_info->caching_threads) < 2)) { - ret = cache_block_group(block_group); + ret = cache_block_group(block_group, trans, + orig_root, 0); BUG_ON(ret); } found_uncached_bg = true; @@ -5218,7 +5548,7 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, u64 num_bytes = ins->offset; block_group = btrfs_lookup_block_group(root->fs_info, ins->objectid); - cache_block_group(block_group); + cache_block_group(block_group, trans, NULL, 0); caching_ctl = get_caching_control(block_group); if (!caching_ctl) { @@ -5308,7 +5638,8 @@ use_block_rsv(struct btrfs_trans_handle *trans, block_rsv = get_block_rsv(trans, root); if (block_rsv->size == 0) { - ret = reserve_metadata_bytes(block_rsv, blocksize); + ret = reserve_metadata_bytes(trans, root, block_rsv, + blocksize, 0); if (ret) return ERR_PTR(ret); return block_rsv; @@ -5318,11 +5649,6 @@ use_block_rsv(struct btrfs_trans_handle *trans, if (!ret) return block_rsv; - WARN_ON(1); - printk(KERN_INFO"block_rsv size %llu reserved %llu freed %llu %llu\n", - block_rsv->size, block_rsv->reserved, - block_rsv->freed[0], block_rsv->freed[1]); - return ERR_PTR(-ENOSPC); } @@ -5421,7 +5747,6 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans, u64 generation; u64 refs; u64 flags; - u64 last = 0; u32 nritems; u32 blocksize; struct btrfs_key key; @@ -5489,7 +5814,6 @@ reada: generation); if (ret) break; - last = bytenr + blocksize; nread++; } wc->reada_slot = slot; @@ -6009,9 +6333,13 @@ int btrfs_drop_snapshot(struct btrfs_root *root, NULL, NULL); BUG_ON(ret < 0); if (ret > 0) { - ret = btrfs_del_orphan_item(trans, tree_root, - root->root_key.objectid); - BUG_ON(ret); + /* if we fail to delete the orphan item this time + * around, it'll get picked up the next time. + * + * The most common failure here is just -ENOENT. + */ + btrfs_del_orphan_item(trans, tree_root, + root->root_key.objectid); } } @@ -7587,7 +7915,14 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) u64 stripped = BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10; - num_devices = root->fs_info->fs_devices->rw_devices; + /* + * we add in the count of missing devices because we want + * to make sure that any RAID levels on a degraded FS + * continue to be honored. + */ + num_devices = root->fs_info->fs_devices->rw_devices + + root->fs_info->fs_devices->missing_devices; + if (num_devices == 1) { stripped |= BTRFS_BLOCK_GROUP_DUP; stripped = flags & ~stripped; @@ -7813,6 +8148,40 @@ out: return ret; } +void btrfs_put_block_group_cache(struct btrfs_fs_info *info) +{ + struct btrfs_block_group_cache *block_group; + u64 last = 0; + + while (1) { + struct inode *inode; + + block_group = btrfs_lookup_first_block_group(info, last); + while (block_group) { + spin_lock(&block_group->lock); + if (block_group->iref) + break; + spin_unlock(&block_group->lock); + block_group = next_block_group(info->tree_root, + block_group); + } + if (!block_group) { + if (last == 0) + break; + last = 0; + continue; + } + + inode = block_group->inode; + block_group->iref = 0; + block_group->inode = NULL; + spin_unlock(&block_group->lock); + iput(inode); + last = block_group->key.objectid + block_group->key.offset; + btrfs_put_block_group(block_group); + } +} + int btrfs_free_block_groups(struct btrfs_fs_info *info) { struct btrfs_block_group_cache *block_group; @@ -7896,6 +8265,8 @@ int btrfs_read_block_groups(struct btrfs_root *root) struct btrfs_key key; struct btrfs_key found_key; struct extent_buffer *leaf; + int need_clear = 0; + u64 cache_gen; root = info->extent_root; key.objectid = 0; @@ -7905,13 +8276,21 @@ int btrfs_read_block_groups(struct btrfs_root *root) if (!path) return -ENOMEM; + cache_gen = btrfs_super_cache_generation(&root->fs_info->super_copy); + if (cache_gen != 0 && + btrfs_super_generation(&root->fs_info->super_copy) != cache_gen) + need_clear = 1; + if (btrfs_test_opt(root, CLEAR_CACHE)) + need_clear = 1; + if (!btrfs_test_opt(root, SPACE_CACHE) && cache_gen) + printk(KERN_INFO "btrfs: disk space caching is enabled\n"); + while (1) { ret = find_first_block_group(root, path, &key); if (ret > 0) break; if (ret != 0) goto error; - leaf = path->nodes[0]; btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); cache = kzalloc(sizeof(*cache), GFP_NOFS); @@ -7927,6 +8306,9 @@ int btrfs_read_block_groups(struct btrfs_root *root) INIT_LIST_HEAD(&cache->list); INIT_LIST_HEAD(&cache->cluster_list); + if (need_clear) + cache->disk_cache_state = BTRFS_DC_CLEAR; + /* * we only want to have 32k of ram per block group for keeping * track of free space, and if we pass 1/2 of that we want to @@ -8031,6 +8413,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, cache->key.offset = size; cache->key.type = BTRFS_BLOCK_GROUP_ITEM_KEY; cache->sectorsize = root->sectorsize; + cache->fs_info = root->fs_info; /* * we only want to have 32k of ram per block group for keeping track @@ -8087,8 +8470,11 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, struct btrfs_path *path; struct btrfs_block_group_cache *block_group; struct btrfs_free_cluster *cluster; + struct btrfs_root *tree_root = root->fs_info->tree_root; struct btrfs_key key; + struct inode *inode; int ret; + int factor; root = root->fs_info->extent_root; @@ -8097,6 +8483,12 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, BUG_ON(!block_group->ro); memcpy(&key, &block_group->key, sizeof(key)); + if (block_group->flags & (BTRFS_BLOCK_GROUP_DUP | + BTRFS_BLOCK_GROUP_RAID1 | + BTRFS_BLOCK_GROUP_RAID10)) + factor = 2; + else + factor = 1; /* make sure this block group isn't part of an allocation cluster */ cluster = &root->fs_info->data_alloc_cluster; @@ -8116,6 +8508,40 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, path = btrfs_alloc_path(); BUG_ON(!path); + inode = lookup_free_space_inode(root, block_group, path); + if (!IS_ERR(inode)) { + btrfs_orphan_add(trans, inode); + clear_nlink(inode); + /* One for the block groups ref */ + spin_lock(&block_group->lock); + if (block_group->iref) { + block_group->iref = 0; + block_group->inode = NULL; + spin_unlock(&block_group->lock); + iput(inode); + } else { + spin_unlock(&block_group->lock); + } + /* One for our lookup ref */ + iput(inode); + } + + key.objectid = BTRFS_FREE_SPACE_OBJECTID; + key.offset = block_group->key.objectid; + key.type = 0; + + ret = btrfs_search_slot(trans, tree_root, &key, path, -1, 1); + if (ret < 0) + goto out; + if (ret > 0) + btrfs_release_path(tree_root, path); + if (ret == 0) { + ret = btrfs_del_item(trans, tree_root, path); + if (ret) + goto out; + btrfs_release_path(tree_root, path); + } + spin_lock(&root->fs_info->block_group_cache_lock); rb_erase(&block_group->cache_node, &root->fs_info->block_group_cache_tree); @@ -8137,8 +8563,11 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, spin_lock(&block_group->space_info->lock); block_group->space_info->total_bytes -= block_group->key.offset; block_group->space_info->bytes_readonly -= block_group->key.offset; + block_group->space_info->disk_total -= block_group->key.offset * factor; spin_unlock(&block_group->space_info->lock); + memcpy(&key, &block_group->key, sizeof(key)); + btrfs_clear_space_info_full(root->fs_info); btrfs_put_block_group(block_group); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index d74e6af..3e86b9f 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -104,7 +104,7 @@ void extent_io_tree_init(struct extent_io_tree *tree, struct address_space *mapping, gfp_t mask) { tree->state = RB_ROOT; - tree->buffer = RB_ROOT; + INIT_RADIX_TREE(&tree->buffer, GFP_ATOMIC); tree->ops = NULL; tree->dirty_bytes = 0; spin_lock_init(&tree->lock); @@ -235,50 +235,6 @@ static inline struct rb_node *tree_search(struct extent_io_tree *tree, return ret; } -static struct extent_buffer *buffer_tree_insert(struct extent_io_tree *tree, - u64 offset, struct rb_node *node) -{ - struct rb_root *root = &tree->buffer; - struct rb_node **p = &root->rb_node; - struct rb_node *parent = NULL; - struct extent_buffer *eb; - - while (*p) { - parent = *p; - eb = rb_entry(parent, struct extent_buffer, rb_node); - - if (offset < eb->start) - p = &(*p)->rb_left; - else if (offset > eb->start) - p = &(*p)->rb_right; - else - return eb; - } - - rb_link_node(node, parent, p); - rb_insert_color(node, root); - return NULL; -} - -static struct extent_buffer *buffer_search(struct extent_io_tree *tree, - u64 offset) -{ - struct rb_root *root = &tree->buffer; - struct rb_node *n = root->rb_node; - struct extent_buffer *eb; - - while (n) { - eb = rb_entry(n, struct extent_buffer, rb_node); - if (offset < eb->start) - n = n->rb_left; - else if (offset > eb->start) - n = n->rb_right; - else - return eb; - } - return NULL; -} - static void merge_cb(struct extent_io_tree *tree, struct extent_state *new, struct extent_state *other) { @@ -1872,9 +1828,9 @@ static void end_bio_extent_preparewrite(struct bio *bio, int err) bio_put(bio); } -static struct bio * -extent_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, - gfp_t gfp_flags) +struct bio * +btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, + gfp_t gfp_flags) { struct bio *bio; @@ -1901,10 +1857,8 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num, struct page *page = bvec->bv_page; struct extent_io_tree *tree = bio->bi_private; u64 start; - u64 end; start = ((u64)page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset; - end = start + bvec->bv_len - 1; bio->bi_private = NULL; @@ -1965,7 +1919,7 @@ static int submit_extent_page(int rw, struct extent_io_tree *tree, else nr = bio_get_nr_vecs(bdev); - bio = extent_bio_alloc(bdev, sector, nr, GFP_NOFS | __GFP_HIGH); + bio = btrfs_bio_alloc(bdev, sector, nr, GFP_NOFS | __GFP_HIGH); bio_add_page(bio, page, page_size, offset); bio->bi_end_io = end_io_func; @@ -2204,7 +2158,6 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, u64 last_byte = i_size_read(inode); u64 block_start; u64 iosize; - u64 unlock_start; sector_t sector; struct extent_state *cached_state = NULL; struct extent_map *em; @@ -2329,7 +2282,6 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, if (tree->ops && tree->ops->writepage_end_io_hook) tree->ops->writepage_end_io_hook(page, start, page_end, NULL, 1); - unlock_start = page_end + 1; goto done; } @@ -2340,7 +2292,6 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, if (tree->ops && tree->ops->writepage_end_io_hook) tree->ops->writepage_end_io_hook(page, cur, page_end, NULL, 1); - unlock_start = page_end + 1; break; } em = epd->get_extent(inode, page, pg_offset, cur, @@ -2387,7 +2338,6 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, cur += iosize; pg_offset += iosize; - unlock_start = cur; continue; } /* leave this out until we have a page_mkwrite call */ @@ -2473,7 +2423,6 @@ static int extent_write_cache_pages(struct extent_io_tree *tree, pgoff_t index; pgoff_t end; /* Inclusive */ int scanned = 0; - int range_whole = 0; pagevec_init(&pvec, 0); if (wbc->range_cyclic) { @@ -2482,8 +2431,6 @@ static int extent_write_cache_pages(struct extent_io_tree *tree, } else { index = wbc->range_start >> PAGE_CACHE_SHIFT; end = wbc->range_end >> PAGE_CACHE_SHIFT; - if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) - range_whole = 1; scanned = 1; } retry: @@ -2823,6 +2770,8 @@ int extent_prepare_write(struct extent_io_tree *tree, NULL, 1, end_bio_extent_preparewrite, 0, 0, 0); + if (ret && !err) + err = ret; iocount++; block_start = block_start + iosize; } else { @@ -2952,21 +2901,53 @@ out: int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, __u64 start, __u64 len, get_extent_t *get_extent) { - int ret; + int ret = 0; u64 off = start; u64 max = start + len; u32 flags = 0; + u32 found_type; + u64 last; u64 disko = 0; + struct btrfs_key found_key; struct extent_map *em = NULL; struct extent_state *cached_state = NULL; + struct btrfs_path *path; + struct btrfs_file_extent_item *item; int end = 0; u64 em_start = 0, em_len = 0; unsigned long emflags; - ret = 0; + int hole = 0; if (len == 0) return -EINVAL; + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + path->leave_spinning = 1; + + ret = btrfs_lookup_file_extent(NULL, BTRFS_I(inode)->root, + path, inode->i_ino, -1, 0); + if (ret < 0) { + btrfs_free_path(path); + return ret; + } + WARN_ON(!ret); + path->slots[0]--; + item = btrfs_item_ptr(path->nodes[0], path->slots[0], + struct btrfs_file_extent_item); + btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]); + found_type = btrfs_key_type(&found_key); + + /* No extents, just return */ + if (found_key.objectid != inode->i_ino || + found_type != BTRFS_EXTENT_DATA_KEY) { + btrfs_free_path(path); + return 0; + } + last = found_key.offset; + btrfs_free_path(path); + lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0, &cached_state, GFP_NOFS); em = get_extent(inode, NULL, 0, off, max - off, 0); @@ -2976,11 +2957,18 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, ret = PTR_ERR(em); goto out; } + while (!end) { + hole = 0; off = em->start + em->len; if (off >= max) end = 1; + if (em->block_start == EXTENT_MAP_HOLE) { + hole = 1; + goto next; + } + em_start = em->start; em_len = em->len; @@ -2990,8 +2978,6 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, if (em->block_start == EXTENT_MAP_LAST_BYTE) { end = 1; flags |= FIEMAP_EXTENT_LAST; - } else if (em->block_start == EXTENT_MAP_HOLE) { - flags |= FIEMAP_EXTENT_UNWRITTEN; } else if (em->block_start == EXTENT_MAP_INLINE) { flags |= (FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED); @@ -3004,10 +2990,10 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags)) flags |= FIEMAP_EXTENT_ENCODED; +next: emflags = em->flags; free_extent_map(em); em = NULL; - if (!end) { em = get_extent(inode, NULL, 0, off, max - off, 0); if (!em) @@ -3018,15 +3004,23 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, } emflags = em->flags; } + if (test_bit(EXTENT_FLAG_VACANCY, &emflags)) { flags |= FIEMAP_EXTENT_LAST; end = 1; } - ret = fiemap_fill_next_extent(fieinfo, em_start, disko, - em_len, flags); - if (ret) - goto out_free; + if (em_start == last) { + flags |= FIEMAP_EXTENT_LAST; + end = 1; + } + + if (!hole) { + ret = fiemap_fill_next_extent(fieinfo, em_start, disko, + em_len, flags); + if (ret) + goto out_free; + } } out_free: free_extent_map(em); @@ -3104,6 +3098,39 @@ static void __free_extent_buffer(struct extent_buffer *eb) kmem_cache_free(extent_buffer_cache, eb); } +/* + * Helper for releasing extent buffer page. + */ +static void btrfs_release_extent_buffer_page(struct extent_buffer *eb, + unsigned long start_idx) +{ + unsigned long index; + struct page *page; + + if (!eb->first_page) + return; + + index = num_extent_pages(eb->start, eb->len); + if (start_idx >= index) + return; + + do { + index--; + page = extent_buffer_page(eb, index); + if (page) + page_cache_release(page); + } while (index != start_idx); +} + +/* + * Helper for releasing the extent buffer. + */ +static inline void btrfs_release_extent_buffer(struct extent_buffer *eb) +{ + btrfs_release_extent_buffer_page(eb, 0); + __free_extent_buffer(eb); +} + struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, u64 start, unsigned long len, struct page *page0, @@ -3117,16 +3144,16 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, struct page *p; struct address_space *mapping = tree->mapping; int uptodate = 1; + int ret; - spin_lock(&tree->buffer_lock); - eb = buffer_search(tree, start); - if (eb) { - atomic_inc(&eb->refs); - spin_unlock(&tree->buffer_lock); + rcu_read_lock(); + eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); + if (eb && atomic_inc_not_zero(&eb->refs)) { + rcu_read_unlock(); mark_page_accessed(eb->first_page); return eb; } - spin_unlock(&tree->buffer_lock); + rcu_read_unlock(); eb = __alloc_extent_buffer(tree, start, len, mask); if (!eb) @@ -3165,26 +3192,31 @@ struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, if (uptodate) set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); + ret = radix_tree_preload(GFP_NOFS & ~__GFP_HIGHMEM); + if (ret) + goto free_eb; + spin_lock(&tree->buffer_lock); - exists = buffer_tree_insert(tree, start, &eb->rb_node); - if (exists) { + ret = radix_tree_insert(&tree->buffer, start >> PAGE_CACHE_SHIFT, eb); + if (ret == -EEXIST) { + exists = radix_tree_lookup(&tree->buffer, + start >> PAGE_CACHE_SHIFT); /* add one reference for the caller */ atomic_inc(&exists->refs); spin_unlock(&tree->buffer_lock); + radix_tree_preload_end(); goto free_eb; } /* add one reference for the tree */ atomic_inc(&eb->refs); spin_unlock(&tree->buffer_lock); + radix_tree_preload_end(); return eb; free_eb: if (!atomic_dec_and_test(&eb->refs)) return exists; - for (index = 1; index < i; index++) - page_cache_release(extent_buffer_page(eb, index)); - page_cache_release(extent_buffer_page(eb, 0)); - __free_extent_buffer(eb); + btrfs_release_extent_buffer(eb); return exists; } @@ -3194,16 +3226,16 @@ struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, { struct extent_buffer *eb; - spin_lock(&tree->buffer_lock); - eb = buffer_search(tree, start); - if (eb) - atomic_inc(&eb->refs); - spin_unlock(&tree->buffer_lock); - - if (eb) + rcu_read_lock(); + eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); + if (eb && atomic_inc_not_zero(&eb->refs)) { + rcu_read_unlock(); mark_page_accessed(eb->first_page); + return eb; + } + rcu_read_unlock(); - return eb; + return NULL; } void free_extent_buffer(struct extent_buffer *eb) @@ -3833,34 +3865,47 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, } } +static inline void btrfs_release_extent_buffer_rcu(struct rcu_head *head) +{ + struct extent_buffer *eb = + container_of(head, struct extent_buffer, rcu_head); + + btrfs_release_extent_buffer(eb); +} + int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page) { u64 start = page_offset(page); struct extent_buffer *eb; int ret = 1; - unsigned long i; - unsigned long num_pages; spin_lock(&tree->buffer_lock); - eb = buffer_search(tree, start); - if (!eb) - goto out; + eb = radix_tree_lookup(&tree->buffer, start >> PAGE_CACHE_SHIFT); + if (!eb) { + spin_unlock(&tree->buffer_lock); + return ret; + } - if (atomic_read(&eb->refs) > 1) { + if (test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { ret = 0; goto out; } - if (test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) { + + /* + * set @eb->refs to 0 if it is already 1, and then release the @eb. + * Or go back. + */ + if (atomic_cmpxchg(&eb->refs, 1, 0) != 1) { ret = 0; goto out; } - /* at this point we can safely release the extent buffer */ - num_pages = num_extent_pages(eb->start, eb->len); - for (i = 0; i < num_pages; i++) - page_cache_release(extent_buffer_page(eb, i)); - rb_erase(&eb->rb_node, &tree->buffer); - __free_extent_buffer(eb); + + radix_tree_delete(&tree->buffer, start >> PAGE_CACHE_SHIFT); out: spin_unlock(&tree->buffer_lock); + + /* at this point we can safely release the extent buffer */ + if (atomic_read(&eb->refs) == 0) + call_rcu(&eb->rcu_head, btrfs_release_extent_buffer_rcu); return ret; } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 5691c7b..4183c81 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -85,7 +85,7 @@ struct extent_io_ops { struct extent_io_tree { struct rb_root state; - struct rb_root buffer; + struct radix_tree_root buffer; struct address_space *mapping; u64 dirty_bytes; spinlock_t lock; @@ -123,7 +123,7 @@ struct extent_buffer { unsigned long bflags; atomic_t refs; struct list_head leak_list; - struct rb_node rb_node; + struct rcu_head rcu_head; /* the spinlock is used to protect most operations */ spinlock_t lock; @@ -310,4 +310,7 @@ int extent_clear_unlock_delalloc(struct inode *inode, struct extent_io_tree *tree, u64 start, u64 end, struct page *locked_page, unsigned long op); +struct bio * +btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, + gfp_t gfp_flags); #endif diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 454ca52..23cb8da 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -335,7 +335,7 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree, goto out; } if (IS_ERR(rb_node)) { - em = ERR_PTR(PTR_ERR(rb_node)); + em = ERR_CAST(rb_node); goto out; } em = rb_entry(rb_node, struct extent_map, rb_node); @@ -384,7 +384,7 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree, goto out; } if (IS_ERR(rb_node)) { - em = ERR_PTR(PTR_ERR(rb_node)); + em = ERR_CAST(rb_node); goto out; } em = rb_entry(rb_node, struct extent_map, rb_node); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index e354c33..66836d8 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -48,30 +48,34 @@ static noinline int btrfs_copy_from_user(loff_t pos, int num_pages, struct page **prepared_pages, struct iov_iter *i) { - size_t copied; + size_t copied = 0; int pg = 0; int offset = pos & (PAGE_CACHE_SIZE - 1); + int total_copied = 0; while (write_bytes > 0) { size_t count = min_t(size_t, PAGE_CACHE_SIZE - offset, write_bytes); struct page *page = prepared_pages[pg]; -again: - if (unlikely(iov_iter_fault_in_readable(i, count))) - return -EFAULT; - - /* Copy data from userspace to the current page */ - copied = iov_iter_copy_from_user(page, i, offset, count); + /* + * Copy data from userspace to the current page + * + * Disable pagefault to avoid recursive lock since + * the pages are already locked + */ + pagefault_disable(); + copied = iov_iter_copy_from_user_atomic(page, i, offset, count); + pagefault_enable(); /* Flush processor's dcache for this page */ flush_dcache_page(page); iov_iter_advance(i, copied); write_bytes -= copied; + total_copied += copied; + /* Return to btrfs_file_aio_write to fault page */ if (unlikely(copied == 0)) { - count = min_t(size_t, PAGE_CACHE_SIZE - offset, - iov_iter_single_seg_count(i)); - goto again; + break; } if (unlikely(copied < PAGE_CACHE_SIZE - offset)) { @@ -81,7 +85,7 @@ again: offset = 0; } } - return 0; + return total_copied; } /* @@ -854,6 +858,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, unsigned long last_index; int will_write; int buffered = 0; + int copied = 0; + int dirty_pages = 0; will_write = ((file->f_flags & O_DSYNC) || IS_SYNC(inode) || (file->f_flags & O_DIRECT)); @@ -970,7 +976,17 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, WARN_ON(num_pages > nrptrs); memset(pages, 0, sizeof(struct page *) * nrptrs); - ret = btrfs_delalloc_reserve_space(inode, write_bytes); + /* + * Fault pages before locking them in prepare_pages + * to avoid recursive lock + */ + if (unlikely(iov_iter_fault_in_readable(&i, write_bytes))) { + ret = -EFAULT; + goto out; + } + + ret = btrfs_delalloc_reserve_space(inode, + num_pages << PAGE_CACHE_SHIFT); if (ret) goto out; @@ -978,37 +994,49 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, pos, first_index, last_index, write_bytes); if (ret) { - btrfs_delalloc_release_space(inode, write_bytes); + btrfs_delalloc_release_space(inode, + num_pages << PAGE_CACHE_SHIFT); goto out; } - ret = btrfs_copy_from_user(pos, num_pages, + copied = btrfs_copy_from_user(pos, num_pages, write_bytes, pages, &i); - if (ret == 0) { + dirty_pages = (copied + PAGE_CACHE_SIZE - 1) >> + PAGE_CACHE_SHIFT; + + if (num_pages > dirty_pages) { + if (copied > 0) + atomic_inc( + &BTRFS_I(inode)->outstanding_extents); + btrfs_delalloc_release_space(inode, + (num_pages - dirty_pages) << + PAGE_CACHE_SHIFT); + } + + if (copied > 0) { dirty_and_release_pages(NULL, root, file, pages, - num_pages, pos, write_bytes); + dirty_pages, pos, copied); } btrfs_drop_pages(pages, num_pages); - if (ret) { - btrfs_delalloc_release_space(inode, write_bytes); - goto out; - } - if (will_write) { - filemap_fdatawrite_range(inode->i_mapping, pos, - pos + write_bytes - 1); - } else { - balance_dirty_pages_ratelimited_nr(inode->i_mapping, - num_pages); - if (num_pages < - (root->leafsize >> PAGE_CACHE_SHIFT) + 1) - btrfs_btree_balance_dirty(root, 1); - btrfs_throttle(root); + if (copied > 0) { + if (will_write) { + filemap_fdatawrite_range(inode->i_mapping, pos, + pos + copied - 1); + } else { + balance_dirty_pages_ratelimited_nr( + inode->i_mapping, + dirty_pages); + if (dirty_pages < + (root->leafsize >> PAGE_CACHE_SHIFT) + 1) + btrfs_btree_balance_dirty(root, 1); + btrfs_throttle(root); + } } - pos += write_bytes; - num_written += write_bytes; + pos += copied; + num_written += copied; cond_resched(); } @@ -1047,8 +1075,14 @@ out: if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) { trans = btrfs_start_transaction(root, 0); + if (IS_ERR(trans)) { + num_written = PTR_ERR(trans); + goto done; + } + mutex_lock(&inode->i_mutex); ret = btrfs_log_dentry_safe(trans, root, file->f_dentry); + mutex_unlock(&inode->i_mutex); if (ret == 0) { ret = btrfs_sync_log(trans, root); if (ret == 0) @@ -1067,6 +1101,7 @@ out: (start_pos + num_written - 1) >> PAGE_CACHE_SHIFT); } } +done: current->backing_dev_info = NULL; return num_written ? num_written : err; } diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index f488fac..60d6842 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -23,10 +23,763 @@ #include "ctree.h" #include "free-space-cache.h" #include "transaction.h" +#include "disk-io.h" #define BITS_PER_BITMAP (PAGE_CACHE_SIZE * 8) #define MAX_CACHE_BYTES_PER_GIG (32 * 1024) +static void recalculate_thresholds(struct btrfs_block_group_cache + *block_group); +static int link_free_space(struct btrfs_block_group_cache *block_group, + struct btrfs_free_space *info); + +struct inode *lookup_free_space_inode(struct btrfs_root *root, + struct btrfs_block_group_cache + *block_group, struct btrfs_path *path) +{ + struct btrfs_key key; + struct btrfs_key location; + struct btrfs_disk_key disk_key; + struct btrfs_free_space_header *header; + struct extent_buffer *leaf; + struct inode *inode = NULL; + int ret; + + spin_lock(&block_group->lock); + if (block_group->inode) + inode = igrab(block_group->inode); + spin_unlock(&block_group->lock); + if (inode) + return inode; + + key.objectid = BTRFS_FREE_SPACE_OBJECTID; + key.offset = block_group->key.objectid; + key.type = 0; + + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + if (ret < 0) + return ERR_PTR(ret); + if (ret > 0) { + btrfs_release_path(root, path); + return ERR_PTR(-ENOENT); + } + + leaf = path->nodes[0]; + header = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_free_space_header); + btrfs_free_space_key(leaf, header, &disk_key); + btrfs_disk_key_to_cpu(&location, &disk_key); + btrfs_release_path(root, path); + + inode = btrfs_iget(root->fs_info->sb, &location, root, NULL); + if (!inode) + return ERR_PTR(-ENOENT); + if (IS_ERR(inode)) + return inode; + if (is_bad_inode(inode)) { + iput(inode); + return ERR_PTR(-ENOENT); + } + + spin_lock(&block_group->lock); + if (!root->fs_info->closing) { + block_group->inode = igrab(inode); + block_group->iref = 1; + } + spin_unlock(&block_group->lock); + + return inode; +} + +int create_free_space_inode(struct btrfs_root *root, + struct btrfs_trans_handle *trans, + struct btrfs_block_group_cache *block_group, + struct btrfs_path *path) +{ + struct btrfs_key key; + struct btrfs_disk_key disk_key; + struct btrfs_free_space_header *header; + struct btrfs_inode_item *inode_item; + struct extent_buffer *leaf; + u64 objectid; + int ret; + + ret = btrfs_find_free_objectid(trans, root, 0, &objectid); + if (ret < 0) + return ret; + + ret = btrfs_insert_empty_inode(trans, root, path, objectid); + if (ret) + return ret; + + leaf = path->nodes[0]; + inode_item = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_inode_item); + btrfs_item_key(leaf, &disk_key, path->slots[0]); + memset_extent_buffer(leaf, 0, (unsigned long)inode_item, + sizeof(*inode_item)); + btrfs_set_inode_generation(leaf, inode_item, trans->transid); + btrfs_set_inode_size(leaf, inode_item, 0); + btrfs_set_inode_nbytes(leaf, inode_item, 0); + btrfs_set_inode_uid(leaf, inode_item, 0); + btrfs_set_inode_gid(leaf, inode_item, 0); + btrfs_set_inode_mode(leaf, inode_item, S_IFREG | 0600); + btrfs_set_inode_flags(leaf, inode_item, BTRFS_INODE_NOCOMPRESS | + BTRFS_INODE_PREALLOC | BTRFS_INODE_NODATASUM); + btrfs_set_inode_nlink(leaf, inode_item, 1); + btrfs_set_inode_transid(leaf, inode_item, trans->transid); + btrfs_set_inode_block_group(leaf, inode_item, + block_group->key.objectid); + btrfs_mark_buffer_dirty(leaf); + btrfs_release_path(root, path); + + key.objectid = BTRFS_FREE_SPACE_OBJECTID; + key.offset = block_group->key.objectid; + key.type = 0; + + ret = btrfs_insert_empty_item(trans, root, path, &key, + sizeof(struct btrfs_free_space_header)); + if (ret < 0) { + btrfs_release_path(root, path); + return ret; + } + leaf = path->nodes[0]; + header = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_free_space_header); + memset_extent_buffer(leaf, 0, (unsigned long)header, sizeof(*header)); + btrfs_set_free_space_key(leaf, header, &disk_key); + btrfs_mark_buffer_dirty(leaf); + btrfs_release_path(root, path); + + return 0; +} + +int btrfs_truncate_free_space_cache(struct btrfs_root *root, + struct btrfs_trans_handle *trans, + struct btrfs_path *path, + struct inode *inode) +{ + loff_t oldsize; + int ret = 0; + + trans->block_rsv = root->orphan_block_rsv; + ret = btrfs_block_rsv_check(trans, root, + root->orphan_block_rsv, + 0, 5); + if (ret) + return ret; + + oldsize = i_size_read(inode); + btrfs_i_size_write(inode, 0); + truncate_pagecache(inode, oldsize, 0); + + /* + * We don't need an orphan item because truncating the free space cache + * will never be split across transactions. + */ + ret = btrfs_truncate_inode_items(trans, root, inode, + 0, BTRFS_EXTENT_DATA_KEY); + if (ret) { + WARN_ON(1); + return ret; + } + + return btrfs_update_inode(trans, root, inode); +} + +static int readahead_cache(struct inode *inode) +{ + struct file_ra_state *ra; + unsigned long last_index; + + ra = kzalloc(sizeof(*ra), GFP_NOFS); + if (!ra) + return -ENOMEM; + + file_ra_state_init(ra, inode->i_mapping); + last_index = (i_size_read(inode) - 1) >> PAGE_CACHE_SHIFT; + + page_cache_sync_readahead(inode->i_mapping, ra, NULL, 0, last_index); + + kfree(ra); + + return 0; +} + +int load_free_space_cache(struct btrfs_fs_info *fs_info, + struct btrfs_block_group_cache *block_group) +{ + struct btrfs_root *root = fs_info->tree_root; + struct inode *inode; + struct btrfs_free_space_header *header; + struct extent_buffer *leaf; + struct page *page; + struct btrfs_path *path; + u32 *checksums = NULL, *crc; + char *disk_crcs = NULL; + struct btrfs_key key; + struct list_head bitmaps; + u64 num_entries; + u64 num_bitmaps; + u64 generation; + u32 cur_crc = ~(u32)0; + pgoff_t index = 0; + unsigned long first_page_offset; + int num_checksums; + int ret = 0; + + /* + * If we're unmounting then just return, since this does a search on the + * normal root and not the commit root and we could deadlock. + */ + smp_mb(); + if (fs_info->closing) + return 0; + + /* + * If this block group has been marked to be cleared for one reason or + * another then we can't trust the on disk cache, so just return. + */ + spin_lock(&block_group->lock); + if (block_group->disk_cache_state != BTRFS_DC_WRITTEN) { + spin_unlock(&block_group->lock); + return 0; + } + spin_unlock(&block_group->lock); + + INIT_LIST_HEAD(&bitmaps); + + path = btrfs_alloc_path(); + if (!path) + return 0; + + inode = lookup_free_space_inode(root, block_group, path); + if (IS_ERR(inode)) { + btrfs_free_path(path); + return 0; + } + + /* Nothing in the space cache, goodbye */ + if (!i_size_read(inode)) { + btrfs_free_path(path); + goto out; + } + + key.objectid = BTRFS_FREE_SPACE_OBJECTID; + key.offset = block_group->key.objectid; + key.type = 0; + + ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); + if (ret) { + btrfs_free_path(path); + goto out; + } + + leaf = path->nodes[0]; + header = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_free_space_header); + num_entries = btrfs_free_space_entries(leaf, header); + num_bitmaps = btrfs_free_space_bitmaps(leaf, header); + generation = btrfs_free_space_generation(leaf, header); + btrfs_free_path(path); + + if (BTRFS_I(inode)->generation != generation) { + printk(KERN_ERR "btrfs: free space inode generation (%llu) did" + " not match free space cache generation (%llu) for " + "block group %llu\n", + (unsigned long long)BTRFS_I(inode)->generation, + (unsigned long long)generation, + (unsigned long long)block_group->key.objectid); + goto free_cache; + } + + if (!num_entries) + goto out; + + /* Setup everything for doing checksumming */ + num_checksums = i_size_read(inode) / PAGE_CACHE_SIZE; + checksums = crc = kzalloc(sizeof(u32) * num_checksums, GFP_NOFS); + if (!checksums) + goto out; + first_page_offset = (sizeof(u32) * num_checksums) + sizeof(u64); + disk_crcs = kzalloc(first_page_offset, GFP_NOFS); + if (!disk_crcs) + goto out; + + ret = readahead_cache(inode); + if (ret) { + ret = 0; + goto out; + } + + while (1) { + struct btrfs_free_space_entry *entry; + struct btrfs_free_space *e; + void *addr; + unsigned long offset = 0; + unsigned long start_offset = 0; + int need_loop = 0; + + if (!num_entries && !num_bitmaps) + break; + + if (index == 0) { + start_offset = first_page_offset; + offset = start_offset; + } + + page = grab_cache_page(inode->i_mapping, index); + if (!page) { + ret = 0; + goto free_cache; + } + + if (!PageUptodate(page)) { + btrfs_readpage(NULL, page); + lock_page(page); + if (!PageUptodate(page)) { + unlock_page(page); + page_cache_release(page); + printk(KERN_ERR "btrfs: error reading free " + "space cache: %llu\n", + (unsigned long long) + block_group->key.objectid); + goto free_cache; + } + } + addr = kmap(page); + + if (index == 0) { + u64 *gen; + + memcpy(disk_crcs, addr, first_page_offset); + gen = addr + (sizeof(u32) * num_checksums); + if (*gen != BTRFS_I(inode)->generation) { + printk(KERN_ERR "btrfs: space cache generation" + " (%llu) does not match inode (%llu) " + "for block group %llu\n", + (unsigned long long)*gen, + (unsigned long long) + BTRFS_I(inode)->generation, + (unsigned long long) + block_group->key.objectid); + kunmap(page); + unlock_page(page); + page_cache_release(page); + goto free_cache; + } + crc = (u32 *)disk_crcs; + } + entry = addr + start_offset; + + /* First lets check our crc before we do anything fun */ + cur_crc = ~(u32)0; + cur_crc = btrfs_csum_data(root, addr + start_offset, cur_crc, + PAGE_CACHE_SIZE - start_offset); + btrfs_csum_final(cur_crc, (char *)&cur_crc); + if (cur_crc != *crc) { + printk(KERN_ERR "btrfs: crc mismatch for page %lu in " + "block group %llu\n", index, + (unsigned long long)block_group->key.objectid); + kunmap(page); + unlock_page(page); + page_cache_release(page); + goto free_cache; + } + crc++; + + while (1) { + if (!num_entries) + break; + + need_loop = 1; + e = kzalloc(sizeof(struct btrfs_free_space), GFP_NOFS); + if (!e) { + kunmap(page); + unlock_page(page); + page_cache_release(page); + goto free_cache; + } + + e->offset = le64_to_cpu(entry->offset); + e->bytes = le64_to_cpu(entry->bytes); + if (!e->bytes) { + kunmap(page); + kfree(e); + unlock_page(page); + page_cache_release(page); + goto free_cache; + } + + if (entry->type == BTRFS_FREE_SPACE_EXTENT) { + spin_lock(&block_group->tree_lock); + ret = link_free_space(block_group, e); + spin_unlock(&block_group->tree_lock); + BUG_ON(ret); + } else { + e->bitmap = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS); + if (!e->bitmap) { + kunmap(page); + kfree(e); + unlock_page(page); + page_cache_release(page); + goto free_cache; + } + spin_lock(&block_group->tree_lock); + ret = link_free_space(block_group, e); + block_group->total_bitmaps++; + recalculate_thresholds(block_group); + spin_unlock(&block_group->tree_lock); + list_add_tail(&e->list, &bitmaps); + } + + num_entries--; + offset += sizeof(struct btrfs_free_space_entry); + if (offset + sizeof(struct btrfs_free_space_entry) >= + PAGE_CACHE_SIZE) + break; + entry++; + } + + /* + * We read an entry out of this page, we need to move on to the + * next page. + */ + if (need_loop) { + kunmap(page); + goto next; + } + + /* + * We add the bitmaps at the end of the entries in order that + * the bitmap entries are added to the cache. + */ + e = list_entry(bitmaps.next, struct btrfs_free_space, list); + list_del_init(&e->list); + memcpy(e->bitmap, addr, PAGE_CACHE_SIZE); + kunmap(page); + num_bitmaps--; +next: + unlock_page(page); + page_cache_release(page); + index++; + } + + ret = 1; +out: + kfree(checksums); + kfree(disk_crcs); + iput(inode); + return ret; + +free_cache: + /* This cache is bogus, make sure it gets cleared */ + spin_lock(&block_group->lock); + block_group->disk_cache_state = BTRFS_DC_CLEAR; + spin_unlock(&block_group->lock); + btrfs_remove_free_space_cache(block_group); + goto out; +} + +int btrfs_write_out_cache(struct btrfs_root *root, + struct btrfs_trans_handle *trans, + struct btrfs_block_group_cache *block_group, + struct btrfs_path *path) +{ + struct btrfs_free_space_header *header; + struct extent_buffer *leaf; + struct inode *inode; + struct rb_node *node; + struct list_head *pos, *n; + struct page *page; + struct extent_state *cached_state = NULL; + struct list_head bitmap_list; + struct btrfs_key key; + u64 bytes = 0; + u32 *crc, *checksums; + pgoff_t index = 0, last_index = 0; + unsigned long first_page_offset; + int num_checksums; + int entries = 0; + int bitmaps = 0; + int ret = 0; + + root = root->fs_info->tree_root; + + INIT_LIST_HEAD(&bitmap_list); + + spin_lock(&block_group->lock); + if (block_group->disk_cache_state < BTRFS_DC_SETUP) { + spin_unlock(&block_group->lock); + return 0; + } + spin_unlock(&block_group->lock); + + inode = lookup_free_space_inode(root, block_group, path); + if (IS_ERR(inode)) + return 0; + + if (!i_size_read(inode)) { + iput(inode); + return 0; + } + + node = rb_first(&block_group->free_space_offset); + if (!node) { + iput(inode); + return 0; + } + + last_index = (i_size_read(inode) - 1) >> PAGE_CACHE_SHIFT; + filemap_write_and_wait(inode->i_mapping); + btrfs_wait_ordered_range(inode, inode->i_size & + ~(root->sectorsize - 1), (u64)-1); + + /* We need a checksum per page. */ + num_checksums = i_size_read(inode) / PAGE_CACHE_SIZE; + crc = checksums = kzalloc(sizeof(u32) * num_checksums, GFP_NOFS); + if (!crc) { + iput(inode); + return 0; + } + + /* Since the first page has all of our checksums and our generation we + * need to calculate the offset into the page that we can start writing + * our entries. + */ + first_page_offset = (sizeof(u32) * num_checksums) + sizeof(u64); + + /* + * Lock all pages first so we can lock the extent safely. + * + * NOTE: Because we hold the ref the entire time we're going to write to + * the page find_get_page should never fail, so we don't do a check + * after find_get_page at this point. Just putting this here so people + * know and don't freak out. + */ + while (index <= last_index) { + page = grab_cache_page(inode->i_mapping, index); + if (!page) { + pgoff_t i = 0; + + while (i < index) { + page = find_get_page(inode->i_mapping, i); + unlock_page(page); + page_cache_release(page); + page_cache_release(page); + i++; + } + goto out_free; + } + index++; + } + + index = 0; + lock_extent_bits(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1, + 0, &cached_state, GFP_NOFS); + + /* Write out the extent entries */ + do { + struct btrfs_free_space_entry *entry; + void *addr; + unsigned long offset = 0; + unsigned long start_offset = 0; + + if (index == 0) { + start_offset = first_page_offset; + offset = start_offset; + } + + page = find_get_page(inode->i_mapping, index); + + addr = kmap(page); + entry = addr + start_offset; + + memset(addr, 0, PAGE_CACHE_SIZE); + while (1) { + struct btrfs_free_space *e; + + e = rb_entry(node, struct btrfs_free_space, offset_index); + entries++; + + entry->offset = cpu_to_le64(e->offset); + entry->bytes = cpu_to_le64(e->bytes); + if (e->bitmap) { + entry->type = BTRFS_FREE_SPACE_BITMAP; + list_add_tail(&e->list, &bitmap_list); + bitmaps++; + } else { + entry->type = BTRFS_FREE_SPACE_EXTENT; + } + node = rb_next(node); + if (!node) + break; + offset += sizeof(struct btrfs_free_space_entry); + if (offset + sizeof(struct btrfs_free_space_entry) >= + PAGE_CACHE_SIZE) + break; + entry++; + } + *crc = ~(u32)0; + *crc = btrfs_csum_data(root, addr + start_offset, *crc, + PAGE_CACHE_SIZE - start_offset); + kunmap(page); + + btrfs_csum_final(*crc, (char *)crc); + crc++; + + bytes += PAGE_CACHE_SIZE; + + ClearPageChecked(page); + set_page_extent_mapped(page); + SetPageUptodate(page); + set_page_dirty(page); + + /* + * We need to release our reference we got for grab_cache_page, + * except for the first page which will hold our checksums, we + * do that below. + */ + if (index != 0) { + unlock_page(page); + page_cache_release(page); + } + + page_cache_release(page); + + index++; + } while (node); + + /* Write out the bitmaps */ + list_for_each_safe(pos, n, &bitmap_list) { + void *addr; + struct btrfs_free_space *entry = + list_entry(pos, struct btrfs_free_space, list); + + page = find_get_page(inode->i_mapping, index); + + addr = kmap(page); + memcpy(addr, entry->bitmap, PAGE_CACHE_SIZE); + *crc = ~(u32)0; + *crc = btrfs_csum_data(root, addr, *crc, PAGE_CACHE_SIZE); + kunmap(page); + btrfs_csum_final(*crc, (char *)crc); + crc++; + bytes += PAGE_CACHE_SIZE; + + ClearPageChecked(page); + set_page_extent_mapped(page); + SetPageUptodate(page); + set_page_dirty(page); + unlock_page(page); + page_cache_release(page); + page_cache_release(page); + list_del_init(&entry->list); + index++; + } + + /* Zero out the rest of the pages just to make sure */ + while (index <= last_index) { + void *addr; + + page = find_get_page(inode->i_mapping, index); + + addr = kmap(page); + memset(addr, 0, PAGE_CACHE_SIZE); + kunmap(page); + ClearPageChecked(page); + set_page_extent_mapped(page); + SetPageUptodate(page); + set_page_dirty(page); + unlock_page(page); + page_cache_release(page); + page_cache_release(page); + bytes += PAGE_CACHE_SIZE; + index++; + } + + btrfs_set_extent_delalloc(inode, 0, bytes - 1, &cached_state); + + /* Write the checksums and trans id to the first page */ + { + void *addr; + u64 *gen; + + page = find_get_page(inode->i_mapping, 0); + + addr = kmap(page); + memcpy(addr, checksums, sizeof(u32) * num_checksums); + gen = addr + (sizeof(u32) * num_checksums); + *gen = trans->transid; + kunmap(page); + ClearPageChecked(page); + set_page_extent_mapped(page); + SetPageUptodate(page); + set_page_dirty(page); + unlock_page(page); + page_cache_release(page); + page_cache_release(page); + } + BTRFS_I(inode)->generation = trans->transid; + + unlock_extent_cached(&BTRFS_I(inode)->io_tree, 0, + i_size_read(inode) - 1, &cached_state, GFP_NOFS); + + filemap_write_and_wait(inode->i_mapping); + + key.objectid = BTRFS_FREE_SPACE_OBJECTID; + key.offset = block_group->key.objectid; + key.type = 0; + + ret = btrfs_search_slot(trans, root, &key, path, 1, 1); + if (ret < 0) { + ret = 0; + clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, bytes - 1, + EXTENT_DIRTY | EXTENT_DELALLOC | + EXTENT_DO_ACCOUNTING, 0, 0, NULL, GFP_NOFS); + goto out_free; + } + leaf = path->nodes[0]; + if (ret > 0) { + struct btrfs_key found_key; + BUG_ON(!path->slots[0]); + path->slots[0]--; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); + if (found_key.objectid != BTRFS_FREE_SPACE_OBJECTID || + found_key.offset != block_group->key.objectid) { + ret = 0; + clear_extent_bit(&BTRFS_I(inode)->io_tree, 0, bytes - 1, + EXTENT_DIRTY | EXTENT_DELALLOC | + EXTENT_DO_ACCOUNTING, 0, 0, NULL, + GFP_NOFS); + btrfs_release_path(root, path); + goto out_free; + } + } + header = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_free_space_header); + btrfs_set_free_space_entries(leaf, header, entries); + btrfs_set_free_space_bitmaps(leaf, header, bitmaps); + btrfs_set_free_space_generation(leaf, header, trans->transid); + btrfs_mark_buffer_dirty(leaf); + btrfs_release_path(root, path); + + ret = 1; + +out_free: + if (ret == 0) { + invalidate_inode_pages2_range(inode->i_mapping, 0, index); + spin_lock(&block_group->lock); + block_group->disk_cache_state = BTRFS_DC_ERROR; + spin_unlock(&block_group->lock); + BTRFS_I(inode)->generation = 0; + } + kfree(checksums); + btrfs_update_inode(trans, root, inode); + iput(inode); + return ret; +} + static inline unsigned long offset_to_bit(u64 bitmap_start, u64 sectorsize, u64 offset) { diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h index 890a8e7..e49ca5c 100644 --- a/fs/btrfs/free-space-cache.h +++ b/fs/btrfs/free-space-cache.h @@ -27,6 +27,24 @@ struct btrfs_free_space { struct list_head list; }; +struct inode *lookup_free_space_inode(struct btrfs_root *root, + struct btrfs_block_group_cache + *block_group, struct btrfs_path *path); +int create_free_space_inode(struct btrfs_root *root, + struct btrfs_trans_handle *trans, + struct btrfs_block_group_cache *block_group, + struct btrfs_path *path); + +int btrfs_truncate_free_space_cache(struct btrfs_root *root, + struct btrfs_trans_handle *trans, + struct btrfs_path *path, + struct inode *inode); +int load_free_space_cache(struct btrfs_fs_info *fs_info, + struct btrfs_block_group_cache *block_group); +int btrfs_write_out_cache(struct btrfs_root *root, + struct btrfs_trans_handle *trans, + struct btrfs_block_group_cache *block_group, + struct btrfs_path *path); int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, u64 bytenr, u64 size); int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 64f99cf..a0ff46a 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -319,8 +319,6 @@ static noinline int compress_file_range(struct inode *inode, struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; u64 num_bytes; - u64 orig_start; - u64 disk_num_bytes; u64 blocksize = root->sectorsize; u64 actual_end; u64 isize = i_size_read(inode); @@ -335,8 +333,6 @@ static noinline int compress_file_range(struct inode *inode, int i; int will_compress; - orig_start = start; - actual_end = min_t(u64, isize, end + 1); again: will_compress = 0; @@ -371,7 +367,6 @@ again: total_compressed = min(total_compressed, max_uncompressed); num_bytes = (end - start + blocksize) & ~(blocksize - 1); num_bytes = max(blocksize, num_bytes); - disk_num_bytes = num_bytes; total_in = 0; ret = 0; @@ -467,7 +462,6 @@ again: if (total_compressed >= total_in) { will_compress = 0; } else { - disk_num_bytes = total_compressed; num_bytes = total_in; } } @@ -501,7 +495,7 @@ again: add_async_extent(async_cow, start, num_bytes, total_compressed, pages, nr_pages_ret); - if (start + num_bytes < end && start + num_bytes < actual_end) { + if (start + num_bytes < end) { start += num_bytes; pages = NULL; cond_resched(); @@ -757,20 +751,17 @@ static noinline int cow_file_range(struct inode *inode, u64 disk_num_bytes; u64 cur_alloc_size; u64 blocksize = root->sectorsize; - u64 actual_end; - u64 isize = i_size_read(inode); struct btrfs_key ins; struct extent_map *em; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; int ret = 0; + BUG_ON(root == root->fs_info->tree_root); trans = btrfs_join_transaction(root, 1); BUG_ON(!trans); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; - actual_end = min_t(u64, isize, end + 1); - num_bytes = (end - start + blocksize) & ~(blocksize - 1); num_bytes = max(blocksize, num_bytes); disk_num_bytes = num_bytes; @@ -1035,10 +1026,16 @@ static noinline int run_delalloc_nocow(struct inode *inode, int type; int nocow; int check_prev = 1; + bool nolock = false; path = btrfs_alloc_path(); BUG_ON(!path); - trans = btrfs_join_transaction(root, 1); + if (root == root->fs_info->tree_root) { + nolock = true; + trans = btrfs_join_transaction_nolock(root, 1); + } else { + trans = btrfs_join_transaction(root, 1); + } BUG_ON(!trans); cow_start = (u64)-1; @@ -1211,8 +1208,13 @@ out_check: BUG_ON(ret); } - ret = btrfs_end_transaction(trans, root); - BUG_ON(ret); + if (nolock) { + ret = btrfs_end_transaction_nolock(trans, root); + BUG_ON(ret); + } else { + ret = btrfs_end_transaction(trans, root); + BUG_ON(ret); + } btrfs_free_path(path); return 0; } @@ -1289,6 +1291,8 @@ static int btrfs_set_bit_hook(struct inode *inode, if (!(state->state & EXTENT_DELALLOC) && (*bits & EXTENT_DELALLOC)) { struct btrfs_root *root = BTRFS_I(inode)->root; u64 len = state->end + 1 - state->start; + int do_list = (root->root_key.objectid != + BTRFS_ROOT_TREE_OBJECTID); if (*bits & EXTENT_FIRST_DELALLOC) *bits &= ~EXTENT_FIRST_DELALLOC; @@ -1298,7 +1302,7 @@ static int btrfs_set_bit_hook(struct inode *inode, spin_lock(&root->fs_info->delalloc_lock); BTRFS_I(inode)->delalloc_bytes += len; root->fs_info->delalloc_bytes += len; - if (list_empty(&BTRFS_I(inode)->delalloc_inodes)) { + if (do_list && list_empty(&BTRFS_I(inode)->delalloc_inodes)) { list_add_tail(&BTRFS_I(inode)->delalloc_inodes, &root->fs_info->delalloc_inodes); } @@ -1321,6 +1325,8 @@ static int btrfs_clear_bit_hook(struct inode *inode, if ((state->state & EXTENT_DELALLOC) && (*bits & EXTENT_DELALLOC)) { struct btrfs_root *root = BTRFS_I(inode)->root; u64 len = state->end + 1 - state->start; + int do_list = (root->root_key.objectid != + BTRFS_ROOT_TREE_OBJECTID); if (*bits & EXTENT_FIRST_DELALLOC) *bits &= ~EXTENT_FIRST_DELALLOC; @@ -1330,14 +1336,15 @@ static int btrfs_clear_bit_hook(struct inode *inode, if (*bits & EXTENT_DO_ACCOUNTING) btrfs_delalloc_release_metadata(inode, len); - if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID) + if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID + && do_list) btrfs_free_reserved_data_space(inode, len); spin_lock(&root->fs_info->delalloc_lock); root->fs_info->delalloc_bytes -= len; BTRFS_I(inode)->delalloc_bytes -= len; - if (BTRFS_I(inode)->delalloc_bytes == 0 && + if (do_list && BTRFS_I(inode)->delalloc_bytes == 0 && !list_empty(&BTRFS_I(inode)->delalloc_inodes)) { list_del_init(&BTRFS_I(inode)->delalloc_inodes); } @@ -1372,7 +1379,7 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset, if (map_length < length + size) return 1; - return 0; + return ret; } /* @@ -1426,7 +1433,10 @@ static int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM; - ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); + if (root == root->fs_info->tree_root) + ret = btrfs_bio_wq_end_io(root->fs_info, bio, 2); + else + ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); BUG_ON(ret); if (!(rw & REQ_WRITE)) { @@ -1662,6 +1672,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) struct extent_state *cached_state = NULL; int compressed = 0; int ret; + bool nolock = false; ret = btrfs_dec_test_ordered_pending(inode, &ordered_extent, start, end - start + 1); @@ -1669,11 +1680,17 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) return 0; BUG_ON(!ordered_extent); + nolock = (root == root->fs_info->tree_root); + if (test_bit(BTRFS_ORDERED_NOCOW, &ordered_extent->flags)) { BUG_ON(!list_empty(&ordered_extent->list)); ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent); if (!ret) { - trans = btrfs_join_transaction(root, 1); + if (nolock) + trans = btrfs_join_transaction_nolock(root, 1); + else + trans = btrfs_join_transaction(root, 1); + BUG_ON(!trans); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; ret = btrfs_update_inode(trans, root, inode); @@ -1686,7 +1703,10 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) ordered_extent->file_offset + ordered_extent->len - 1, 0, &cached_state, GFP_NOFS); - trans = btrfs_join_transaction(root, 1); + if (nolock) + trans = btrfs_join_transaction_nolock(root, 1); + else + trans = btrfs_join_transaction(root, 1); btrfs_set_trans_block_group(trans, inode); trans->block_rsv = &root->fs_info->delalloc_block_rsv; @@ -1700,6 +1720,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) ordered_extent->len); BUG_ON(ret); } else { + BUG_ON(root == root->fs_info->tree_root); ret = insert_reserved_file_extent(trans, inode, ordered_extent->file_offset, ordered_extent->start, @@ -1724,9 +1745,15 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) ret = btrfs_update_inode(trans, root, inode); BUG_ON(ret); out: - btrfs_delalloc_release_metadata(inode, ordered_extent->len); - if (trans) - btrfs_end_transaction(trans, root); + if (nolock) { + if (trans) + btrfs_end_transaction_nolock(trans, root); + } else { + btrfs_delalloc_release_metadata(inode, ordered_extent->len); + if (trans) + btrfs_end_transaction(trans, root); + } + /* once for us */ btrfs_put_ordered_extent(ordered_extent); /* once for the tree */ @@ -2237,7 +2264,6 @@ void btrfs_orphan_cleanup(struct btrfs_root *root) { struct btrfs_path *path; struct extent_buffer *leaf; - struct btrfs_item *item; struct btrfs_key key, found_key; struct btrfs_trans_handle *trans; struct inode *inode; @@ -2275,7 +2301,6 @@ void btrfs_orphan_cleanup(struct btrfs_root *root) /* pull out the item */ leaf = path->nodes[0]; - item = btrfs_item_nr(leaf, path->slots[0]); btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); /* make sure the item matches what we want */ @@ -2651,7 +2676,8 @@ int btrfs_unlink_inode(struct btrfs_trans_handle *trans, ret = btrfs_del_dir_entries_in_log(trans, root, name, name_len, dir, index); - BUG_ON(ret); + if (ret == -ENOENT) + ret = 0; err: btrfs_free_path(path); if (ret) @@ -2672,8 +2698,8 @@ static int check_path_shared(struct btrfs_root *root, { struct extent_buffer *eb; int level; - int ret; u64 refs = 1; + int uninitialized_var(ret); for (level = 0; level < BTRFS_MAX_LEVEL; level++) { if (!path->nodes[level]) @@ -2686,7 +2712,7 @@ static int check_path_shared(struct btrfs_root *root, if (refs > 1) return 1; } - return 0; + return ret; /* XXX callers? */ } /* @@ -3196,7 +3222,7 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, BUG_ON(new_size > 0 && min_type != BTRFS_EXTENT_DATA_KEY); - if (root->ref_cows) + if (root->ref_cows || root == root->fs_info->tree_root) btrfs_drop_extent_cache(inode, new_size & (~mask), (u64)-1, 0); path = btrfs_alloc_path(); @@ -3344,7 +3370,8 @@ delete: } else { break; } - if (found_extent && root->ref_cows) { + if (found_extent && (root->ref_cows || + root == root->fs_info->tree_root)) { btrfs_set_path_blocking(path); ret = btrfs_free_extent(trans, root, extent_start, extent_num_bytes, 0, @@ -3675,7 +3702,8 @@ void btrfs_evict_inode(struct inode *inode) int ret; truncate_inode_pages(&inode->i_data, 0); - if (inode->i_nlink && btrfs_root_refs(&root->root_item) != 0) + if (inode->i_nlink && (btrfs_root_refs(&root->root_item) != 0 || + root == root->fs_info->tree_root)) goto no_delete; if (is_bad_inode(inode)) { @@ -3888,7 +3916,14 @@ static void inode_tree_del(struct inode *inode) } spin_unlock(&root->inode_lock); - if (empty && btrfs_root_refs(&root->root_item) == 0) { + /* + * Free space cache has inodes in the tree root, but the tree root has a + * root_refs of 0, so this could end up dropping the tree root as a + * snapshot, so we need the extra !root->fs_info->tree_root check to + * make sure we don't drop it. + */ + if (empty && btrfs_root_refs(&root->root_item) == 0 && + root != root->fs_info->tree_root) { synchronize_srcu(&root->fs_info->subvol_srcu); spin_lock(&root->inode_lock); empty = RB_EMPTY_ROOT(&root->inode_tree); @@ -4049,7 +4084,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry) int index; int ret; - dentry->d_op = &btrfs_dentry_operations; + d_set_d_op(dentry, &btrfs_dentry_operations); if (dentry->d_name.len > BTRFS_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); @@ -4092,7 +4127,7 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry) return inode; } -static int btrfs_dentry_delete(struct dentry *dentry) +static int btrfs_dentry_delete(const struct dentry *dentry) { struct btrfs_root *root; @@ -4282,14 +4317,24 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc) struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; int ret = 0; + bool nolock = false; if (BTRFS_I(inode)->dummy_inode) return 0; + smp_mb(); + nolock = (root->fs_info->closing && root == root->fs_info->tree_root); + if (wbc->sync_mode == WB_SYNC_ALL) { - trans = btrfs_join_transaction(root, 1); + if (nolock) + trans = btrfs_join_transaction_nolock(root, 1); + else + trans = btrfs_join_transaction(root, 1); btrfs_set_trans_block_group(trans, inode); - ret = btrfs_commit_transaction(trans, root); + if (nolock) + ret = btrfs_end_transaction_nolock(trans, root); + else + ret = btrfs_commit_transaction(trans, root); } return ret; } @@ -4456,6 +4501,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, BTRFS_I(inode)->index_cnt = 2; BTRFS_I(inode)->root = root; BTRFS_I(inode)->generation = trans->transid; + inode->i_generation = BTRFS_I(inode)->generation; btrfs_set_inode_space_info(root, inode); if (mode & S_IFDIR) @@ -4577,12 +4623,12 @@ int btrfs_add_link(struct btrfs_trans_handle *trans, } static int btrfs_add_nondir(struct btrfs_trans_handle *trans, - struct dentry *dentry, struct inode *inode, - int backref, u64 index) + struct inode *dir, struct dentry *dentry, + struct inode *inode, int backref, u64 index) { - int err = btrfs_add_link(trans, dentry->d_parent->d_inode, - inode, dentry->d_name.name, - dentry->d_name.len, backref, index); + int err = btrfs_add_link(trans, dir, inode, + dentry->d_name.name, dentry->d_name.len, + backref, index); if (!err) { d_instantiate(dentry, inode); return 0; @@ -4623,8 +4669,7 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, btrfs_set_trans_block_group(trans, dir); inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name, - dentry->d_name.len, - dentry->d_parent->d_inode->i_ino, objectid, + dentry->d_name.len, dir->i_ino, objectid, BTRFS_I(dir)->block_group, mode, &index); err = PTR_ERR(inode); if (IS_ERR(inode)) @@ -4637,7 +4682,7 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, } btrfs_set_trans_block_group(trans, inode); - err = btrfs_add_nondir(trans, dentry, inode, 0, index); + err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index); if (err) drop_inode = 1; else { @@ -4685,10 +4730,8 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, btrfs_set_trans_block_group(trans, dir); inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name, - dentry->d_name.len, - dentry->d_parent->d_inode->i_ino, - objectid, BTRFS_I(dir)->block_group, mode, - &index); + dentry->d_name.len, dir->i_ino, objectid, + BTRFS_I(dir)->block_group, mode, &index); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_unlock; @@ -4700,7 +4743,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, } btrfs_set_trans_block_group(trans, inode); - err = btrfs_add_nondir(trans, dentry, inode, 0, index); + err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index); if (err) drop_inode = 1; else { @@ -4742,6 +4785,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, return -EPERM; btrfs_inc_nlink(inode); + inode->i_ctime = CURRENT_TIME; err = btrfs_set_inode_index(dir, &index); if (err) @@ -4760,15 +4804,17 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, btrfs_set_trans_block_group(trans, dir); ihold(inode); - err = btrfs_add_nondir(trans, dentry, inode, 1, index); + err = btrfs_add_nondir(trans, dir, dentry, inode, 1, index); if (err) { drop_inode = 1; } else { + struct dentry *parent = dget_parent(dentry); btrfs_update_inode_block_group(trans, dir); err = btrfs_update_inode(trans, root, inode); BUG_ON(err); - btrfs_log_new_name(trans, inode, NULL, dentry->d_parent); + btrfs_log_new_name(trans, inode, NULL, parent); + dput(parent); } nr = trans->blocks_used; @@ -4808,8 +4854,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) btrfs_set_trans_block_group(trans, dir); inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name, - dentry->d_name.len, - dentry->d_parent->d_inode->i_ino, objectid, + dentry->d_name.len, dir->i_ino, objectid, BTRFS_I(dir)->block_group, S_IFDIR | mode, &index); if (IS_ERR(inode)) { @@ -4832,9 +4877,8 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) if (err) goto out_fail; - err = btrfs_add_link(trans, dentry->d_parent->d_inode, - inode, dentry->d_name.name, - dentry->d_name.len, 0, index); + err = btrfs_add_link(trans, dir, inode, dentry->d_name.name, + dentry->d_name.len, 0, index); if (err) goto out_fail; @@ -5490,13 +5534,21 @@ struct btrfs_dio_private { u64 bytes; u32 *csums; void *private; + + /* number of bios pending for this dio */ + atomic_t pending_bios; + + /* IO errors */ + int errors; + + struct bio *orig_bio; }; static void btrfs_endio_direct_read(struct bio *bio, int err) { + struct btrfs_dio_private *dip = bio->bi_private; struct bio_vec *bvec_end = bio->bi_io_vec + bio->bi_vcnt - 1; struct bio_vec *bvec = bio->bi_io_vec; - struct btrfs_dio_private *dip = bio->bi_private; struct inode *inode = dip->inode; struct btrfs_root *root = BTRFS_I(inode)->root; u64 start; @@ -5550,15 +5602,18 @@ static void btrfs_endio_direct_write(struct bio *bio, int err) struct btrfs_trans_handle *trans; struct btrfs_ordered_extent *ordered = NULL; struct extent_state *cached_state = NULL; + u64 ordered_offset = dip->logical_offset; + u64 ordered_bytes = dip->bytes; int ret; if (err) goto out_done; - - ret = btrfs_dec_test_ordered_pending(inode, &ordered, - dip->logical_offset, dip->bytes); +again: + ret = btrfs_dec_test_first_ordered_pending(inode, &ordered, + &ordered_offset, + ordered_bytes); if (!ret) - goto out_done; + goto out_test; BUG_ON(!ordered); @@ -5618,8 +5673,20 @@ out_unlock: out: btrfs_delalloc_release_metadata(inode, ordered->len); btrfs_end_transaction(trans, root); + ordered_offset = ordered->file_offset + ordered->len; btrfs_put_ordered_extent(ordered); btrfs_put_ordered_extent(ordered); + +out_test: + /* + * our bio might span multiple ordered extents. If we haven't + * completed the accounting for the whole dio, go back and try again + */ + if (ordered_offset < dip->logical_offset + dip->bytes) { + ordered_bytes = dip->logical_offset + dip->bytes - + ordered_offset; + goto again; + } out_done: bio->bi_private = dip->private; @@ -5639,13 +5706,182 @@ static int __btrfs_submit_bio_start_direct_io(struct inode *inode, int rw, return 0; } +static void btrfs_end_dio_bio(struct bio *bio, int err) +{ + struct btrfs_dio_private *dip = bio->bi_private; + + if (err) { + printk(KERN_ERR "btrfs direct IO failed ino %lu rw %lu " + "sector %#Lx len %u err no %d\n", + dip->inode->i_ino, bio->bi_rw, + (unsigned long long)bio->bi_sector, bio->bi_size, err); + dip->errors = 1; + + /* + * before atomic variable goto zero, we must make sure + * dip->errors is perceived to be set. + */ + smp_mb__before_atomic_dec(); + } + + /* if there are more bios still pending for this dio, just exit */ + if (!atomic_dec_and_test(&dip->pending_bios)) + goto out; + + if (dip->errors) + bio_io_error(dip->orig_bio); + else { + set_bit(BIO_UPTODATE, &dip->orig_bio->bi_flags); + bio_endio(dip->orig_bio, 0); + } +out: + bio_put(bio); +} + +static struct bio *btrfs_dio_bio_alloc(struct block_device *bdev, + u64 first_sector, gfp_t gfp_flags) +{ + int nr_vecs = bio_get_nr_vecs(bdev); + return btrfs_bio_alloc(bdev, first_sector, nr_vecs, gfp_flags); +} + +static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, + int rw, u64 file_offset, int skip_sum, + u32 *csums) +{ + int write = rw & REQ_WRITE; + struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + bio_get(bio); + ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); + if (ret) + goto err; + + if (write && !skip_sum) { + ret = btrfs_wq_submit_bio(root->fs_info, + inode, rw, bio, 0, 0, + file_offset, + __btrfs_submit_bio_start_direct_io, + __btrfs_submit_bio_done); + goto err; + } else if (!skip_sum) + btrfs_lookup_bio_sums_dio(root, inode, bio, + file_offset, csums); + + ret = btrfs_map_bio(root, rw, bio, 0, 1); +err: + bio_put(bio); + return ret; +} + +static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, + int skip_sum) +{ + struct inode *inode = dip->inode; + struct btrfs_root *root = BTRFS_I(inode)->root; + struct btrfs_mapping_tree *map_tree = &root->fs_info->mapping_tree; + struct bio *bio; + struct bio *orig_bio = dip->orig_bio; + struct bio_vec *bvec = orig_bio->bi_io_vec; + u64 start_sector = orig_bio->bi_sector; + u64 file_offset = dip->logical_offset; + u64 submit_len = 0; + u64 map_length; + int nr_pages = 0; + u32 *csums = dip->csums; + int ret = 0; + + bio = btrfs_dio_bio_alloc(orig_bio->bi_bdev, start_sector, GFP_NOFS); + if (!bio) + return -ENOMEM; + bio->bi_private = dip; + bio->bi_end_io = btrfs_end_dio_bio; + atomic_inc(&dip->pending_bios); + + map_length = orig_bio->bi_size; + ret = btrfs_map_block(map_tree, READ, start_sector << 9, + &map_length, NULL, 0); + if (ret) { + bio_put(bio); + return -EIO; + } + + while (bvec <= (orig_bio->bi_io_vec + orig_bio->bi_vcnt - 1)) { + if (unlikely(map_length < submit_len + bvec->bv_len || + bio_add_page(bio, bvec->bv_page, bvec->bv_len, + bvec->bv_offset) < bvec->bv_len)) { + /* + * inc the count before we submit the bio so + * we know the end IO handler won't happen before + * we inc the count. Otherwise, the dip might get freed + * before we're done setting it up + */ + atomic_inc(&dip->pending_bios); + ret = __btrfs_submit_dio_bio(bio, inode, rw, + file_offset, skip_sum, + csums); + if (ret) { + bio_put(bio); + atomic_dec(&dip->pending_bios); + goto out_err; + } + + if (!skip_sum) + csums = csums + nr_pages; + start_sector += submit_len >> 9; + file_offset += submit_len; + + submit_len = 0; + nr_pages = 0; + + bio = btrfs_dio_bio_alloc(orig_bio->bi_bdev, + start_sector, GFP_NOFS); + if (!bio) + goto out_err; + bio->bi_private = dip; + bio->bi_end_io = btrfs_end_dio_bio; + + map_length = orig_bio->bi_size; + ret = btrfs_map_block(map_tree, READ, start_sector << 9, + &map_length, NULL, 0); + if (ret) { + bio_put(bio); + goto out_err; + } + } else { + submit_len += bvec->bv_len; + nr_pages ++; + bvec++; + } + } + + ret = __btrfs_submit_dio_bio(bio, inode, rw, file_offset, skip_sum, + csums); + if (!ret) + return 0; + + bio_put(bio); +out_err: + dip->errors = 1; + /* + * before atomic variable goto zero, we must + * make sure dip->errors is perceived to be set. + */ + smp_mb__before_atomic_dec(); + if (atomic_dec_and_test(&dip->pending_bios)) + bio_io_error(dip->orig_bio); + + /* bio_end_io() will handle error, so we needn't return it */ + return 0; +} + static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode, loff_t file_offset) { struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_dio_private *dip; struct bio_vec *bvec = bio->bi_io_vec; - u64 start; int skip_sum; int write = rw & REQ_WRITE; int ret = 0; @@ -5671,7 +5907,6 @@ static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode, dip->inode = inode; dip->logical_offset = file_offset; - start = dip->logical_offset; dip->bytes = 0; do { dip->bytes += bvec->bv_len; @@ -5680,36 +5915,18 @@ static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode, dip->disk_bytenr = (u64)bio->bi_sector << 9; bio->bi_private = dip; + dip->errors = 0; + dip->orig_bio = bio; + atomic_set(&dip->pending_bios, 0); if (write) bio->bi_end_io = btrfs_endio_direct_write; else bio->bi_end_io = btrfs_endio_direct_read; - ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); - if (ret) - goto out_err; - - if (write && !skip_sum) { - ret = btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, - inode, rw, bio, 0, 0, - dip->logical_offset, - __btrfs_submit_bio_start_direct_io, - __btrfs_submit_bio_done); - if (ret) - goto out_err; + ret = btrfs_submit_direct_hook(rw, dip, skip_sum); + if (!ret) return; - } else if (!skip_sum) - btrfs_lookup_bio_sums_dio(root, inode, bio, - dip->logical_offset, dip->csums); - - ret = btrfs_map_bio(root, rw, bio, 0, 1); - if (ret) - goto out_err; - return; -out_err: - kfree(dip->csums); - kfree(dip); free_ordered: /* * If this is a write, we need to clean up the reserved space and kill @@ -5717,8 +5934,7 @@ free_ordered: */ if (write) { struct btrfs_ordered_extent *ordered; - ordered = btrfs_lookup_ordered_extent(inode, - dip->logical_offset); + ordered = btrfs_lookup_ordered_extent(inode, file_offset); if (!test_bit(BTRFS_ORDERED_PREALLOC, &ordered->flags) && !test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags)) btrfs_free_reserved_extent(root, ordered->start, @@ -6279,6 +6495,13 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) return inode; } +static void btrfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode)); +} + void btrfs_destroy_inode(struct inode *inode) { struct btrfs_ordered_extent *ordered; @@ -6308,6 +6531,21 @@ void btrfs_destroy_inode(struct inode *inode) spin_unlock(&root->fs_info->ordered_extent_lock); } + if (root == root->fs_info->tree_root) { + struct btrfs_block_group_cache *block_group; + + block_group = btrfs_lookup_block_group(root->fs_info, + BTRFS_I(inode)->block_group); + if (block_group && block_group->inode == inode) { + spin_lock(&block_group->lock); + block_group->inode = NULL; + spin_unlock(&block_group->lock); + btrfs_put_block_group(block_group); + } else if (block_group) { + btrfs_put_block_group(block_group); + } + } + spin_lock(&root->orphan_lock); if (!list_empty(&BTRFS_I(inode)->i_orphan)) { printk(KERN_INFO "BTRFS: inode %lu still on the orphan list\n", @@ -6333,14 +6571,15 @@ void btrfs_destroy_inode(struct inode *inode) inode_tree_del(inode); btrfs_drop_extent_cache(inode, 0, (u64)-1, 0); free: - kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode)); + call_rcu(&inode->i_rcu, btrfs_i_callback); } int btrfs_drop_inode(struct inode *inode) { struct btrfs_root *root = BTRFS_I(inode)->root; - if (btrfs_root_refs(&root->root_item) == 0) + if (btrfs_root_refs(&root->root_item) == 0 && + root != root->fs_info->tree_root) return 1; else return generic_drop_inode(inode); @@ -6548,8 +6787,9 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, BUG_ON(ret); if (old_inode->i_ino != BTRFS_FIRST_FREE_OBJECTID) { - btrfs_log_new_name(trans, old_inode, old_dir, - new_dentry->d_parent); + struct dentry *parent = dget_parent(new_dentry); + btrfs_log_new_name(trans, old_inode, old_dir, parent); + dput(parent); btrfs_end_log_trans(root); } out_fail: @@ -6609,7 +6849,8 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput) return 0; } -int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput) +int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput, + int sync) { struct btrfs_inode *binode; struct inode *inode = NULL; @@ -6631,7 +6872,26 @@ int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput) spin_unlock(&root->fs_info->delalloc_lock); if (inode) { - write_inode_now(inode, 0); + if (sync) { + filemap_write_and_wait(inode->i_mapping); + /* + * We have to do this because compression doesn't + * actually set PG_writeback until it submits the pages + * for IO, which happens in an async thread, so we could + * race and not actually wait for any writeback pages + * because they've not been submitted yet. Technically + * this could still be the case for the ordered stuff + * since the async thread may not have started to do its + * work yet. If this becomes the case then we need to + * figure out a way to make sure that in writepage we + * wait for any async pages to be submitted before + * returning so that fdatawait does what its supposed to + * do. + */ + btrfs_wait_ordered_range(inode, 0, (u64)-1); + } else { + filemap_flush(inode->i_mapping); + } if (delay_iput) btrfs_add_delayed_iput(inode); else @@ -6679,8 +6939,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, btrfs_set_trans_block_group(trans, dir); inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name, - dentry->d_name.len, - dentry->d_parent->d_inode->i_ino, objectid, + dentry->d_name.len, dir->i_ino, objectid, BTRFS_I(dir)->block_group, S_IFLNK|S_IRWXUGO, &index); err = PTR_ERR(inode); @@ -6694,7 +6953,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, } btrfs_set_trans_block_group(trans, inode); - err = btrfs_add_nondir(trans, dentry, inode, 0, index); + err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index); if (err) drop_inode = 1; else { @@ -6757,27 +7016,34 @@ out_unlock: return err; } -int btrfs_prealloc_file_range(struct inode *inode, int mode, - u64 start, u64 num_bytes, u64 min_size, - loff_t actual_len, u64 *alloc_hint) +static int __btrfs_prealloc_file_range(struct inode *inode, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint, + struct btrfs_trans_handle *trans) { - struct btrfs_trans_handle *trans; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_key ins; u64 cur_offset = start; + u64 i_size; int ret = 0; + bool own_trans = true; + if (trans) + own_trans = false; while (num_bytes > 0) { - trans = btrfs_start_transaction(root, 3); - if (IS_ERR(trans)) { - ret = PTR_ERR(trans); - break; + if (own_trans) { + trans = btrfs_start_transaction(root, 3); + if (IS_ERR(trans)) { + ret = PTR_ERR(trans); + break; + } } ret = btrfs_reserve_extent(trans, root, num_bytes, min_size, 0, *alloc_hint, (u64)-1, &ins, 1); if (ret) { - btrfs_end_transaction(trans, root); + if (own_trans) + btrfs_end_transaction(trans, root); break; } @@ -6800,21 +7066,40 @@ int btrfs_prealloc_file_range(struct inode *inode, int mode, (actual_len > inode->i_size) && (cur_offset > inode->i_size)) { if (cur_offset > actual_len) - i_size_write(inode, actual_len); + i_size = actual_len; else - i_size_write(inode, cur_offset); - i_size_write(inode, cur_offset); - btrfs_ordered_update_i_size(inode, cur_offset, NULL); + i_size = cur_offset; + i_size_write(inode, i_size); + btrfs_ordered_update_i_size(inode, i_size, NULL); } ret = btrfs_update_inode(trans, root, inode); BUG_ON(ret); - btrfs_end_transaction(trans, root); + if (own_trans) + btrfs_end_transaction(trans, root); } return ret; } +int btrfs_prealloc_file_range(struct inode *inode, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint) +{ + return __btrfs_prealloc_file_range(inode, mode, start, num_bytes, + min_size, actual_len, alloc_hint, + NULL); +} + +int btrfs_prealloc_file_range_trans(struct inode *inode, + struct btrfs_trans_handle *trans, int mode, + u64 start, u64 num_bytes, u64 min_size, + loff_t actual_len, u64 *alloc_hint) +{ + return __btrfs_prealloc_file_range(inode, mode, start, num_bytes, + min_size, actual_len, alloc_hint, trans); +} + static long btrfs_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len) { @@ -6839,6 +7124,10 @@ static long btrfs_fallocate(struct inode *inode, int mode, btrfs_wait_ordered_range(inode, alloc_start, alloc_end - alloc_start); mutex_lock(&inode->i_mutex); + ret = inode_newsize_ok(inode, alloc_end); + if (ret) + goto out; + if (alloc_start > inode->i_size) { ret = btrfs_cont_expand(inode, alloc_start); if (ret) @@ -6922,11 +7211,11 @@ static int btrfs_set_page_dirty(struct page *page) return __set_page_dirty_nobuffers(page); } -static int btrfs_permission(struct inode *inode, int mask) +static int btrfs_permission(struct inode *inode, int mask, unsigned int flags) { if ((BTRFS_I(inode)->flags & BTRFS_INODE_READONLY) && (mask & MAY_WRITE)) return -EACCES; - return generic_permission(inode, mask, btrfs_check_acl); + return generic_permission(inode, mask, flags, btrfs_check_acl); } static const struct inode_operations btrfs_dir_inode_operations = { @@ -7035,6 +7324,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, + .getattr = btrfs_getattr, .permission = btrfs_permission, .setxattr = btrfs_setxattr, .getxattr = btrfs_getxattr, diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 9254b3d..f87552a 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -224,7 +224,8 @@ static int btrfs_ioctl_getversion(struct file *file, int __user *arg) static noinline int create_subvol(struct btrfs_root *root, struct dentry *dentry, - char *name, int namelen) + char *name, int namelen, + u64 *async_transid) { struct btrfs_trans_handle *trans; struct btrfs_key key; @@ -232,7 +233,8 @@ static noinline int create_subvol(struct btrfs_root *root, struct btrfs_inode_item *inode_item; struct extent_buffer *leaf; struct btrfs_root *new_root; - struct inode *dir = dentry->d_parent->d_inode; + struct dentry *parent = dget_parent(dentry); + struct inode *dir; int ret; int err; u64 objectid; @@ -241,8 +243,13 @@ static noinline int create_subvol(struct btrfs_root *root, ret = btrfs_find_free_objectid(NULL, root->fs_info->tree_root, 0, &objectid); - if (ret) + if (ret) { + dput(parent); return ret; + } + + dir = parent->d_inode; + /* * 1 - inode item * 2 - refs @@ -250,8 +257,10 @@ static noinline int create_subvol(struct btrfs_root *root, * 2 - dir items */ trans = btrfs_start_transaction(root, 6); - if (IS_ERR(trans)) + if (IS_ERR(trans)) { + dput(parent); return PTR_ERR(trans); + } leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, objectid, NULL, 0, 0, 0); @@ -338,15 +347,23 @@ static noinline int create_subvol(struct btrfs_root *root, d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry)); fail: - err = btrfs_commit_transaction(trans, root); + dput(parent); + if (async_transid) { + *async_transid = trans->transid; + err = btrfs_commit_transaction_async(trans, root, 1); + } else { + err = btrfs_commit_transaction(trans, root); + } if (err && !ret) ret = err; return ret; } -static int create_snapshot(struct btrfs_root *root, struct dentry *dentry) +static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, + char *name, int namelen, u64 *async_transid) { struct inode *inode; + struct dentry *parent; struct btrfs_pending_snapshot *pending_snapshot; struct btrfs_trans_handle *trans; int ret; @@ -373,7 +390,14 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry) list_add(&pending_snapshot->list, &trans->transaction->pending_snapshots); - ret = btrfs_commit_transaction(trans, root->fs_info->extent_root); + if (async_transid) { + *async_transid = trans->transid; + ret = btrfs_commit_transaction_async(trans, + root->fs_info->extent_root, 1); + } else { + ret = btrfs_commit_transaction(trans, + root->fs_info->extent_root); + } BUG_ON(ret); ret = pending_snapshot->error; @@ -382,7 +406,9 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry) btrfs_orphan_cleanup(pending_snapshot->snap); - inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry); + parent = dget_parent(dentry); + inode = btrfs_lookup_dentry(parent->d_inode, dentry); + dput(parent); if (IS_ERR(inode)) { ret = PTR_ERR(inode); goto fail; @@ -395,6 +421,76 @@ fail: return ret; } +/* copy of check_sticky in fs/namei.c() +* It's inline, so penalty for filesystems that don't use sticky bit is +* minimal. +*/ +static inline int btrfs_check_sticky(struct inode *dir, struct inode *inode) +{ + uid_t fsuid = current_fsuid(); + + if (!(dir->i_mode & S_ISVTX)) + return 0; + if (inode->i_uid == fsuid) + return 0; + if (dir->i_uid == fsuid) + return 0; + return !capable(CAP_FOWNER); +} + +/* copy of may_delete in fs/namei.c() + * Check whether we can remove a link victim from directory dir, check + * whether the type of victim is right. + * 1. We can't do it if dir is read-only (done in permission()) + * 2. We should have write and exec permissions on dir + * 3. We can't remove anything from append-only dir + * 4. We can't do anything with immutable dir (done in permission()) + * 5. If the sticky bit on dir is set we should either + * a. be owner of dir, or + * b. be owner of victim, or + * c. have CAP_FOWNER capability + * 6. If the victim is append-only or immutable we can't do antyhing with + * links pointing to it. + * 7. If we were asked to remove a directory and victim isn't one - ENOTDIR. + * 8. If we were asked to remove a non-directory and victim isn't one - EISDIR. + * 9. We can't remove a root or mountpoint. + * 10. We don't allow removal of NFS sillyrenamed files; it's handled by + * nfs_async_unlink(). + */ + +static int btrfs_may_delete(struct inode *dir,struct dentry *victim,int isdir) +{ + int error; + + if (!victim->d_inode) + return -ENOENT; + + BUG_ON(victim->d_parent->d_inode != dir); + audit_inode_child(victim, dir); + + error = inode_permission(dir, MAY_WRITE | MAY_EXEC); + if (error) + return error; + if (IS_APPEND(dir)) + return -EPERM; + if (btrfs_check_sticky(dir, victim->d_inode)|| + IS_APPEND(victim->d_inode)|| + IS_IMMUTABLE(victim->d_inode) || IS_SWAPFILE(victim->d_inode)) + return -EPERM; + if (isdir) { + if (!S_ISDIR(victim->d_inode->i_mode)) + return -ENOTDIR; + if (IS_ROOT(victim)) + return -EBUSY; + } else if (S_ISDIR(victim->d_inode->i_mode)) + return -EISDIR; + if (IS_DEADDIR(dir)) + return -ENOENT; + if (victim->d_flags & DCACHE_NFSFS_RENAMED) + return -EBUSY; + return 0; +} + /* copy of may_create in fs/namei.c() */ static inline int btrfs_may_create(struct inode *dir, struct dentry *child) { @@ -412,7 +508,8 @@ static inline int btrfs_may_create(struct inode *dir, struct dentry *child) */ static noinline int btrfs_mksubvol(struct path *parent, char *name, int namelen, - struct btrfs_root *snap_src) + struct btrfs_root *snap_src, + u64 *async_transid) { struct inode *dir = parent->dentry->d_inode; struct dentry *dentry; @@ -443,10 +540,11 @@ static noinline int btrfs_mksubvol(struct path *parent, goto out_up_read; if (snap_src) { - error = create_snapshot(snap_src, dentry); + error = create_snapshot(snap_src, dentry, + name, namelen, async_transid); } else { error = create_subvol(BTRFS_I(dir)->root, dentry, - name, namelen); + name, namelen, async_transid); } if (!error) fsnotify_mkdir(dir, dentry); @@ -708,7 +806,6 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, char *sizestr; char *devstr = NULL; int ret = 0; - int namelen; int mod = 0; if (root->fs_info->sb->s_flags & MS_RDONLY) @@ -722,7 +819,6 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root, return PTR_ERR(vol_args); vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; - namelen = strlen(vol_args->name); mutex_lock(&root->fs_info->volume_mutex); sizestr = vol_args->name; @@ -801,11 +897,13 @@ out_unlock: return ret; } -static noinline int btrfs_ioctl_snap_create(struct file *file, - void __user *arg, int subvol) +static noinline int btrfs_ioctl_snap_create_transid(struct file *file, + char *name, + unsigned long fd, + int subvol, + u64 *transid) { struct btrfs_root *root = BTRFS_I(fdentry(file)->d_inode)->root; - struct btrfs_ioctl_vol_args *vol_args; struct file *src_file; int namelen; int ret = 0; @@ -813,23 +911,18 @@ static noinline int btrfs_ioctl_snap_create(struct file *file, if (root->fs_info->sb->s_flags & MS_RDONLY) return -EROFS; - vol_args = memdup_user(arg, sizeof(*vol_args)); - if (IS_ERR(vol_args)) - return PTR_ERR(vol_args); - - vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; - namelen = strlen(vol_args->name); - if (strchr(vol_args->name, '/')) { + namelen = strlen(name); + if (strchr(name, '/')) { ret = -EINVAL; goto out; } if (subvol) { - ret = btrfs_mksubvol(&file->f_path, vol_args->name, namelen, - NULL); + ret = btrfs_mksubvol(&file->f_path, name, namelen, + NULL, transid); } else { struct inode *src_inode; - src_file = fget(vol_args->fd); + src_file = fget(fd); if (!src_file) { ret = -EINVAL; goto out; @@ -843,12 +936,68 @@ static noinline int btrfs_ioctl_snap_create(struct file *file, fput(src_file); goto out; } - ret = btrfs_mksubvol(&file->f_path, vol_args->name, namelen, - BTRFS_I(src_inode)->root); + ret = btrfs_mksubvol(&file->f_path, name, namelen, + BTRFS_I(src_inode)->root, + transid); fput(src_file); } out: + return ret; +} + +static noinline int btrfs_ioctl_snap_create(struct file *file, + void __user *arg, int subvol, + int v2) +{ + struct btrfs_ioctl_vol_args *vol_args = NULL; + struct btrfs_ioctl_vol_args_v2 *vol_args_v2 = NULL; + char *name; + u64 fd; + int ret; + + if (v2) { + u64 transid = 0; + u64 *ptr = NULL; + + vol_args_v2 = memdup_user(arg, sizeof(*vol_args_v2)); + if (IS_ERR(vol_args_v2)) + return PTR_ERR(vol_args_v2); + + if (vol_args_v2->flags & ~BTRFS_SUBVOL_CREATE_ASYNC) { + ret = -EINVAL; + goto out; + } + + name = vol_args_v2->name; + fd = vol_args_v2->fd; + vol_args_v2->name[BTRFS_SUBVOL_NAME_MAX] = '\0'; + + if (vol_args_v2->flags & BTRFS_SUBVOL_CREATE_ASYNC) + ptr = &transid; + + ret = btrfs_ioctl_snap_create_transid(file, name, fd, + subvol, ptr); + + if (ret == 0 && ptr && + copy_to_user(arg + + offsetof(struct btrfs_ioctl_vol_args_v2, + transid), ptr, sizeof(*ptr))) + ret = -EFAULT; + } else { + vol_args = memdup_user(arg, sizeof(*vol_args)); + if (IS_ERR(vol_args)) + return PTR_ERR(vol_args); + name = vol_args->name; + fd = vol_args->fd; + vol_args->name[BTRFS_PATH_NAME_MAX] = '\0'; + + ret = btrfs_ioctl_snap_create_transid(file, name, fd, + subvol, NULL); + } +out: kfree(vol_args); + kfree(vol_args_v2); + return ret; } @@ -1073,14 +1222,10 @@ static noinline int btrfs_ioctl_tree_search(struct file *file, if (!capable(CAP_SYS_ADMIN)) return -EPERM; - args = kmalloc(sizeof(*args), GFP_KERNEL); - if (!args) - return -ENOMEM; + args = memdup_user(argp, sizeof(*args)); + if (IS_ERR(args)) + return PTR_ERR(args); - if (copy_from_user(args, argp, sizeof(*args))) { - kfree(args); - return -EFAULT; - } inode = fdentry(file)->d_inode; ret = search_ioctl(inode, args); if (ret == 0 && copy_to_user(argp, args, sizeof(*args))) @@ -1188,14 +1333,10 @@ static noinline int btrfs_ioctl_ino_lookup(struct file *file, if (!capable(CAP_SYS_ADMIN)) return -EPERM; - args = kmalloc(sizeof(*args), GFP_KERNEL); - if (!args) - return -ENOMEM; + args = memdup_user(argp, sizeof(*args)); + if (IS_ERR(args)) + return PTR_ERR(args); - if (copy_from_user(args, argp, sizeof(*args))) { - kfree(args); - return -EFAULT; - } inode = fdentry(file)->d_inode; if (args->treeid == 0) @@ -1227,9 +1368,6 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, int ret; int err = 0; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - vol_args = memdup_user(arg, sizeof(*vol_args)); if (IS_ERR(vol_args)) return PTR_ERR(vol_args); @@ -1259,13 +1397,51 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, } inode = dentry->d_inode; + dest = BTRFS_I(inode)->root; + if (!capable(CAP_SYS_ADMIN)){ + /* + * Regular user. Only allow this with a special mount + * option, when the user has write+exec access to the + * subvol root, and when rmdir(2) would have been + * allowed. + * + * Note that this is _not_ check that the subvol is + * empty or doesn't contain data that we wouldn't + * otherwise be able to delete. + * + * Users who want to delete empty subvols should try + * rmdir(2). + */ + err = -EPERM; + if (!btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED)) + goto out_dput; + + /* + * Do not allow deletion if the parent dir is the same + * as the dir to be deleted. That means the ioctl + * must be called on the dentry referencing the root + * of the subvol, not a random directory contained + * within it. + */ + err = -EINVAL; + if (root == dest) + goto out_dput; + + err = inode_permission(inode, MAY_WRITE | MAY_EXEC); + if (err) + goto out_dput; + + /* check if subvolume may be deleted by a non-root user */ + err = btrfs_may_delete(dir, dentry, 1); + if (err) + goto out_dput; + } + if (inode->i_ino != BTRFS_FIRST_FREE_OBJECTID) { err = -EINVAL; goto out_dput; } - dest = BTRFS_I(inode)->root; - mutex_lock(&inode->i_mutex); err = d_invalidate(dentry); if (err) @@ -1304,7 +1480,7 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file, BUG_ON(ret); } - ret = btrfs_commit_transaction(trans, root); + ret = btrfs_end_transaction(trans, root); BUG_ON(ret); inode->i_flags |= S_DEAD; out_up_write: @@ -1502,11 +1678,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, path->reada = 2; if (inode < src) { - mutex_lock(&inode->i_mutex); - mutex_lock(&src->i_mutex); + mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT); + mutex_lock_nested(&src->i_mutex, I_MUTEX_CHILD); } else { - mutex_lock(&src->i_mutex); - mutex_lock(&inode->i_mutex); + mutex_lock_nested(&src->i_mutex, I_MUTEX_PARENT); + mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); } /* determine range to clone */ @@ -1517,12 +1693,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, olen = len = src->i_size - off; /* if we extend to eof, continue to block boundary */ if (off + len == src->i_size) - len = ((src->i_size + bs-1) & ~(bs-1)) - - off; + len = ALIGN(src->i_size, bs) - off; /* verify the end result is block aligned */ - if ((off & (bs-1)) || - ((off + len) & (bs-1))) + if (!IS_ALIGNED(off, bs) || !IS_ALIGNED(off + len, bs) || + !IS_ALIGNED(destoff, bs)) goto out_unlock; /* do any pending delalloc/csum calc on src, one way or @@ -1530,13 +1705,15 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, while (1) { struct btrfs_ordered_extent *ordered; lock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS); - ordered = btrfs_lookup_first_ordered_extent(inode, off+len); - if (BTRFS_I(src)->delalloc_bytes == 0 && !ordered) + ordered = btrfs_lookup_first_ordered_extent(src, off+len); + if (!ordered && + !test_range_bit(&BTRFS_I(src)->io_tree, off, off+len, + EXTENT_DELALLOC, 0, NULL)) break; unlock_extent(&BTRFS_I(src)->io_tree, off, off+len, GFP_NOFS); if (ordered) btrfs_put_ordered_extent(ordered); - btrfs_wait_ordered_range(src, off, off+len); + btrfs_wait_ordered_range(src, off, len); } /* clone data */ @@ -1605,7 +1782,7 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, } btrfs_release_path(root, path); - if (key.offset + datal < off || + if (key.offset + datal <= off || key.offset >= off+len) goto next; @@ -1720,8 +1897,8 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, * but shouldn't round up the file size */ endoff = new_key.offset + datal; - if (endoff > off+olen) - endoff = off+olen; + if (endoff > destoff+olen) + endoff = destoff+olen; if (endoff > inode->i_size) btrfs_i_size_write(inode, endoff); @@ -1879,6 +2056,22 @@ static long btrfs_ioctl_default_subvol(struct file *file, void __user *argp) return 0; } +static void get_block_group_info(struct list_head *groups_list, + struct btrfs_ioctl_space_info *space) +{ + struct btrfs_block_group_cache *block_group; + + space->total_bytes = 0; + space->used_bytes = 0; + space->flags = 0; + list_for_each_entry(block_group, groups_list, list) { + space->flags = block_group->flags; + space->total_bytes += block_group->key.offset; + space->used_bytes += + btrfs_block_group_used(&block_group->item); + } +} + long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) { struct btrfs_ioctl_space_args space_args; @@ -1887,27 +2080,56 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) struct btrfs_ioctl_space_info *dest_orig; struct btrfs_ioctl_space_info *user_dest; struct btrfs_space_info *info; + u64 types[] = {BTRFS_BLOCK_GROUP_DATA, + BTRFS_BLOCK_GROUP_SYSTEM, + BTRFS_BLOCK_GROUP_METADATA, + BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; + int num_types = 4; int alloc_size; int ret = 0; int slot_count = 0; + int i, c; if (copy_from_user(&space_args, (struct btrfs_ioctl_space_args __user *)arg, sizeof(space_args))) return -EFAULT; - /* first we count slots */ - rcu_read_lock(); - list_for_each_entry_rcu(info, &root->fs_info->space_info, list) - slot_count++; - rcu_read_unlock(); + for (i = 0; i < num_types; i++) { + struct btrfs_space_info *tmp; + + info = NULL; + rcu_read_lock(); + list_for_each_entry_rcu(tmp, &root->fs_info->space_info, + list) { + if (tmp->flags == types[i]) { + info = tmp; + break; + } + } + rcu_read_unlock(); + + if (!info) + continue; + + down_read(&info->groups_sem); + for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { + if (!list_empty(&info->block_groups[c])) + slot_count++; + } + up_read(&info->groups_sem); + } /* space_slots == 0 means they are asking for a count */ if (space_args.space_slots == 0) { space_args.total_spaces = slot_count; goto out; } + + slot_count = min_t(int, space_args.space_slots, slot_count); + alloc_size = sizeof(*dest) * slot_count; + /* we generally have at most 6 or so space infos, one for each raid * level. So, a whole page should be more than enough for everyone */ @@ -1921,27 +2143,34 @@ long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg) dest_orig = dest; /* now we have a buffer to copy into */ - rcu_read_lock(); - list_for_each_entry_rcu(info, &root->fs_info->space_info, list) { - /* make sure we don't copy more than we allocated - * in our buffer - */ - if (slot_count == 0) - break; - slot_count--; - - /* make sure userland has enough room in their buffer */ - if (space_args.total_spaces >= space_args.space_slots) - break; + for (i = 0; i < num_types; i++) { + struct btrfs_space_info *tmp; + + info = NULL; + rcu_read_lock(); + list_for_each_entry_rcu(tmp, &root->fs_info->space_info, + list) { + if (tmp->flags == types[i]) { + info = tmp; + break; + } + } + rcu_read_unlock(); - space.flags = info->flags; - space.total_bytes = info->total_bytes; - space.used_bytes = info->bytes_used; - memcpy(dest, &space, sizeof(space)); - dest++; - space_args.total_spaces++; + if (!info) + continue; + down_read(&info->groups_sem); + for (c = 0; c < BTRFS_NR_RAID_TYPES; c++) { + if (!list_empty(&info->block_groups[c])) { + get_block_group_info(&info->block_groups[c], + &space); + memcpy(dest, &space, sizeof(space)); + dest++; + space_args.total_spaces++; + } + } + up_read(&info->groups_sem); } - rcu_read_unlock(); user_dest = (struct btrfs_ioctl_space_info *) (arg + sizeof(struct btrfs_ioctl_space_args)); @@ -1984,6 +2213,36 @@ long btrfs_ioctl_trans_end(struct file *file) return 0; } +static noinline long btrfs_ioctl_start_sync(struct file *file, void __user *argp) +{ + struct btrfs_root *root = BTRFS_I(file->f_dentry->d_inode)->root; + struct btrfs_trans_handle *trans; + u64 transid; + + trans = btrfs_start_transaction(root, 0); + transid = trans->transid; + btrfs_commit_transaction_async(trans, root, 0); + + if (argp) + if (copy_to_user(argp, &transid, sizeof(transid))) + return -EFAULT; + return 0; +} + +static noinline long btrfs_ioctl_wait_sync(struct file *file, void __user *argp) +{ + struct btrfs_root *root = BTRFS_I(file->f_dentry->d_inode)->root; + u64 transid; + + if (argp) { + if (copy_from_user(&transid, argp, sizeof(transid))) + return -EFAULT; + } else { + transid = 0; /* current trans */ + } + return btrfs_wait_for_commit(root, transid); +} + long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -1998,9 +2257,11 @@ long btrfs_ioctl(struct file *file, unsigned int case FS_IOC_GETVERSION: return btrfs_ioctl_getversion(file, argp); case BTRFS_IOC_SNAP_CREATE: - return btrfs_ioctl_snap_create(file, argp, 0); + return btrfs_ioctl_snap_create(file, argp, 0, 0); + case BTRFS_IOC_SNAP_CREATE_V2: + return btrfs_ioctl_snap_create(file, argp, 0, 1); case BTRFS_IOC_SUBVOL_CREATE: - return btrfs_ioctl_snap_create(file, argp, 1); + return btrfs_ioctl_snap_create(file, argp, 1, 0); case BTRFS_IOC_SNAP_DESTROY: return btrfs_ioctl_snap_destroy(file, argp); case BTRFS_IOC_DEFAULT_SUBVOL: @@ -2034,6 +2295,10 @@ long btrfs_ioctl(struct file *file, unsigned int case BTRFS_IOC_SYNC: btrfs_sync_fs(file->f_dentry->d_sb, 1); return 0; + case BTRFS_IOC_START_SYNC: + return btrfs_ioctl_start_sync(file, argp); + case BTRFS_IOC_WAIT_SYNC: + return btrfs_ioctl_wait_sync(file, argp); } return -ENOTTY; diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index 424694a..c344d12 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -22,14 +22,25 @@ #define BTRFS_IOCTL_MAGIC 0x94 #define BTRFS_VOL_NAME_MAX 255 -#define BTRFS_PATH_NAME_MAX 4087 /* this should be 4k */ +#define BTRFS_PATH_NAME_MAX 4087 struct btrfs_ioctl_vol_args { __s64 fd; char name[BTRFS_PATH_NAME_MAX + 1]; }; +#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0) + +#define BTRFS_SUBVOL_NAME_MAX 4039 +struct btrfs_ioctl_vol_args_v2 { + __s64 fd; + __u64 transid; + __u64 flags; + __u64 unused[4]; + char name[BTRFS_SUBVOL_NAME_MAX + 1]; +}; + #define BTRFS_INO_LOOKUP_PATH_MAX 4080 struct btrfs_ioctl_ino_lookup_args { __u64 treeid; @@ -178,4 +189,8 @@ struct btrfs_ioctl_space_args { #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64) #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ struct btrfs_ioctl_space_args) +#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64) +#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64) +#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ + struct btrfs_ioctl_vol_args_v2) #endif diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index e56c72b..ae7737e 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -250,6 +250,73 @@ int btrfs_add_ordered_sum(struct inode *inode, /* * this is used to account for finished IO across a given range + * of the file. The IO may span ordered extents. If + * a given ordered_extent is completely done, 1 is returned, otherwise + * 0. + * + * test_and_set_bit on a flag in the struct btrfs_ordered_extent is used + * to make sure this function only returns 1 once for a given ordered extent. + * + * file_offset is updated to one byte past the range that is recorded as + * complete. This allows you to walk forward in the file. + */ +int btrfs_dec_test_first_ordered_pending(struct inode *inode, + struct btrfs_ordered_extent **cached, + u64 *file_offset, u64 io_size) +{ + struct btrfs_ordered_inode_tree *tree; + struct rb_node *node; + struct btrfs_ordered_extent *entry = NULL; + int ret; + u64 dec_end; + u64 dec_start; + u64 to_dec; + + tree = &BTRFS_I(inode)->ordered_tree; + spin_lock(&tree->lock); + node = tree_search(tree, *file_offset); + if (!node) { + ret = 1; + goto out; + } + + entry = rb_entry(node, struct btrfs_ordered_extent, rb_node); + if (!offset_in_entry(entry, *file_offset)) { + ret = 1; + goto out; + } + + dec_start = max(*file_offset, entry->file_offset); + dec_end = min(*file_offset + io_size, entry->file_offset + + entry->len); + *file_offset = dec_end; + if (dec_start > dec_end) { + printk(KERN_CRIT "bad ordering dec_start %llu end %llu\n", + (unsigned long long)dec_start, + (unsigned long long)dec_end); + } + to_dec = dec_end - dec_start; + if (to_dec > entry->bytes_left) { + printk(KERN_CRIT "bad ordered accounting left %llu size %llu\n", + (unsigned long long)entry->bytes_left, + (unsigned long long)to_dec); + } + entry->bytes_left -= to_dec; + if (entry->bytes_left == 0) + ret = test_and_set_bit(BTRFS_ORDERED_IO_DONE, &entry->flags); + else + ret = 1; +out: + if (!ret && cached && entry) { + *cached = entry; + atomic_inc(&entry->refs); + } + spin_unlock(&tree->lock); + return ret == 0; +} + +/* + * this is used to account for finished IO across a given range * of the file. The IO should not span ordered extents. If * a given ordered_extent is completely done, 1 is returned, otherwise * 0. @@ -526,7 +593,6 @@ int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) { u64 end; u64 orig_end; - u64 wait_end; struct btrfs_ordered_extent *ordered; int found; @@ -537,7 +603,6 @@ int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len) if (orig_end > INT_LIMIT(loff_t)) orig_end = INT_LIMIT(loff_t); } - wait_end = orig_end; again: /* start IO across the range first to instantiate any delalloc * extents diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 8ac3654..61dca83 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -141,6 +141,9 @@ int btrfs_remove_ordered_extent(struct inode *inode, int btrfs_dec_test_ordered_pending(struct inode *inode, struct btrfs_ordered_extent **cached, u64 file_offset, u64 io_size); +int btrfs_dec_test_first_ordered_pending(struct inode *inode, + struct btrfs_ordered_extent **cached, + u64 *file_offset, u64 io_size); int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, u64 start, u64 len, u64 disk_len, int type); int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset, diff --git a/fs/btrfs/orphan.c b/fs/btrfs/orphan.c index 79cba5f..f8be250 100644 --- a/fs/btrfs/orphan.c +++ b/fs/btrfs/orphan.c @@ -56,8 +56,12 @@ int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, return -ENOMEM; ret = btrfs_search_slot(trans, root, &key, path, -1, 1); - if (ret) + if (ret < 0) goto out; + if (ret) { + ret = -ENOENT; + goto out; + } ret = btrfs_del_item(trans, root, path); diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index b37d723..045c9c2 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -29,6 +29,7 @@ #include "locking.h" #include "btrfs_inode.h" #include "async-thread.h" +#include "free-space-cache.h" /* * backref_node, mapping_node and tree_block start with this @@ -178,8 +179,6 @@ struct reloc_control { u64 search_start; u64 extents_found; - int block_rsv_retries; - unsigned int stage:8; unsigned int create_reloc_tree:1; unsigned int merge_reloc_tree:1; @@ -2133,7 +2132,6 @@ int prepare_to_merge(struct reloc_control *rc, int err) LIST_HEAD(reloc_roots); u64 num_bytes = 0; int ret; - int retries = 0; mutex_lock(&root->fs_info->trans_mutex); rc->merging_rsv_size += root->nodesize * (BTRFS_MAX_LEVEL - 1) * 2; @@ -2143,7 +2141,7 @@ again: if (!err) { num_bytes = rc->merging_rsv_size; ret = btrfs_block_rsv_add(NULL, root, rc->block_rsv, - num_bytes, &retries); + num_bytes); if (ret) err = ret; } @@ -2155,7 +2153,6 @@ again: btrfs_end_transaction(trans, rc->extent_root); btrfs_block_rsv_release(rc->extent_root, rc->block_rsv, num_bytes); - retries = 0; goto again; } } @@ -2405,15 +2402,13 @@ static int reserve_metadata_space(struct btrfs_trans_handle *trans, num_bytes = calcu_metadata_size(rc, node, 1) * 2; trans->block_rsv = rc->block_rsv; - ret = btrfs_block_rsv_add(trans, root, rc->block_rsv, num_bytes, - &rc->block_rsv_retries); + ret = btrfs_block_rsv_add(trans, root, rc->block_rsv, num_bytes); if (ret) { if (ret == -EAGAIN) rc->commit_transaction = 1; return ret; } - rc->block_rsv_retries = 0; return 0; } @@ -3099,6 +3094,8 @@ static int add_tree_block(struct reloc_control *rc, BUG_ON(item_size != sizeof(struct btrfs_extent_item_v0)); ret = get_ref_objectid_v0(rc, path, extent_key, &ref_owner, NULL); + if (ret < 0) + return ret; BUG_ON(ref_owner >= BTRFS_MAX_LEVEL); level = (int)ref_owner; /* FIXME: get real generation */ @@ -3191,6 +3188,54 @@ static int block_use_full_backref(struct reloc_control *rc, return ret; } +static int delete_block_group_cache(struct btrfs_fs_info *fs_info, + struct inode *inode, u64 ino) +{ + struct btrfs_key key; + struct btrfs_path *path; + struct btrfs_root *root = fs_info->tree_root; + struct btrfs_trans_handle *trans; + unsigned long nr; + int ret = 0; + + if (inode) + goto truncate; + + key.objectid = ino; + key.type = BTRFS_INODE_ITEM_KEY; + key.offset = 0; + + inode = btrfs_iget(fs_info->sb, &key, root, NULL); + if (!inode || IS_ERR(inode) || is_bad_inode(inode)) { + if (inode && !IS_ERR(inode)) + iput(inode); + return -ENOENT; + } + +truncate: + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto out; + } + + trans = btrfs_join_transaction(root, 0); + if (IS_ERR(trans)) { + btrfs_free_path(path); + goto out; + } + + ret = btrfs_truncate_free_space_cache(root, trans, path, inode); + + btrfs_free_path(path); + nr = trans->blocks_used; + btrfs_end_transaction(trans, root); + btrfs_btree_balance_dirty(root, nr); +out: + iput(inode); + return ret; +} + /* * helper to add tree blocks for backref of type BTRFS_EXTENT_DATA_REF_KEY * this function scans fs tree to find blocks reference the data extent @@ -3217,15 +3262,27 @@ static int find_data_references(struct reloc_control *rc, int counted; int ret; - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - ref_root = btrfs_extent_data_ref_root(leaf, ref); ref_objectid = btrfs_extent_data_ref_objectid(leaf, ref); ref_offset = btrfs_extent_data_ref_offset(leaf, ref); ref_count = btrfs_extent_data_ref_count(leaf, ref); + /* + * This is an extent belonging to the free space cache, lets just delete + * it and redo the search. + */ + if (ref_root == BTRFS_ROOT_TREE_OBJECTID) { + ret = delete_block_group_cache(rc->extent_root->fs_info, + NULL, ref_objectid); + if (ret != -ENOENT) + return ret; + ret = 0; + } + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + root = read_fs_root(rc->extent_root->fs_info, ref_root); if (IS_ERR(root)) { err = PTR_ERR(root); @@ -3554,8 +3611,7 @@ int prepare_to_relocate(struct reloc_control *rc) * is no reservation in transaction handle. */ ret = btrfs_block_rsv_add(NULL, rc->extent_root, rc->block_rsv, - rc->extent_root->nodesize * 256, - &rc->block_rsv_retries); + rc->extent_root->nodesize * 256); if (ret) return ret; @@ -3567,7 +3623,6 @@ int prepare_to_relocate(struct reloc_control *rc) rc->extents_found = 0; rc->nodes_relocated = 0; rc->merging_rsv_size = 0; - rc->block_rsv_retries = 0; rc->create_reloc_tree = 1; set_reloc_control(rc); @@ -3860,6 +3915,8 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) { struct btrfs_fs_info *fs_info = extent_root->fs_info; struct reloc_control *rc; + struct inode *inode; + struct btrfs_path *path; int ret; int rw = 0; int err = 0; @@ -3882,6 +3939,26 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) rw = 1; } + path = btrfs_alloc_path(); + if (!path) { + err = -ENOMEM; + goto out; + } + + inode = lookup_free_space_inode(fs_info->tree_root, rc->block_group, + path); + btrfs_free_path(path); + + if (!IS_ERR(inode)) + ret = delete_block_group_cache(fs_info, inode, 0); + else + ret = PTR_ERR(inode); + + if (ret && ret != -ENOENT) { + err = ret; + goto out; + } + rc->data_inode = create_reloc_inode(fs_info, rc->block_group); if (IS_ERR(rc->data_inode)) { err = PTR_ERR(rc->data_inode); @@ -4143,7 +4220,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len) btrfs_add_ordered_sum(inode, ordered, sums); } btrfs_put_ordered_extent(ordered); - return 0; + return ret; } void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 2d958be..6a1086e 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -181,7 +181,6 @@ int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid) { struct btrfs_root *dead_root; - struct btrfs_item *item; struct btrfs_root_item *ri; struct btrfs_key key; struct btrfs_key found_key; @@ -214,7 +213,6 @@ again: nritems = btrfs_header_nritems(leaf); slot = path->slots[0]; } - item = btrfs_item_nr(leaf, slot); btrfs_item_key_to_cpu(leaf, &key, slot); if (btrfs_key_type(&key) != BTRFS_ROOT_ITEM_KEY) goto next; diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 144f8a5..883c6fa 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -61,6 +61,8 @@ static void btrfs_put_super(struct super_block *sb) ret = close_ctree(root); sb->s_fs_info = NULL; + + (void)ret; /* FIXME: need to fix VFS to return error? */ } enum { @@ -68,7 +70,8 @@ enum { Opt_nodatacow, Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd, Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_compress_force, Opt_notreelog, Opt_ratio, Opt_flushoncommit, - Opt_discard, Opt_err, + Opt_discard, Opt_space_cache, Opt_clear_cache, Opt_err, + Opt_user_subvol_rm_allowed, }; static match_table_t tokens = { @@ -92,6 +95,9 @@ static match_table_t tokens = { {Opt_flushoncommit, "flushoncommit"}, {Opt_ratio, "metadata_ratio=%d"}, {Opt_discard, "discard"}, + {Opt_space_cache, "space_cache"}, + {Opt_clear_cache, "clear_cache"}, + {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"}, {Opt_err, NULL}, }; @@ -235,6 +241,17 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) case Opt_discard: btrfs_set_opt(info->mount_opt, DISCARD); break; + case Opt_space_cache: + printk(KERN_INFO "btrfs: enabling disk space caching\n"); + btrfs_set_opt(info->mount_opt, SPACE_CACHE); + break; + case Opt_clear_cache: + printk(KERN_INFO "btrfs: force clearing of disk cache\n"); + btrfs_set_opt(info->mount_opt, CLEAR_CACHE); + break; + case Opt_user_subvol_rm_allowed: + btrfs_set_opt(info->mount_opt, USER_SUBVOL_RM_ALLOWED); + break; case Opt_err: printk(KERN_INFO "btrfs: unrecognized mount option " "'%s'\n", p); @@ -380,7 +397,7 @@ static struct dentry *get_default_root(struct super_block *sb, find_root: new_root = btrfs_read_fs_root_no_name(root->fs_info, &location); if (IS_ERR(new_root)) - return ERR_PTR(PTR_ERR(new_root)); + return ERR_CAST(new_root); if (btrfs_root_refs(&new_root->root_item) == 0) return ERR_PTR(-ENOENT); @@ -436,7 +453,6 @@ static int btrfs_fill_super(struct super_block *sb, { struct inode *inode; struct dentry *root_dentry; - struct btrfs_super_block *disk_super; struct btrfs_root *tree_root; struct btrfs_key key; int err; @@ -458,7 +474,6 @@ static int btrfs_fill_super(struct super_block *sb, return PTR_ERR(tree_root); } sb->s_fs_info = tree_root; - disk_super = &tree_root->fs_info->super_copy; key.objectid = BTRFS_FIRST_FREE_OBJECTID; key.type = BTRFS_INODE_ITEM_KEY; @@ -548,30 +563,45 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs) static int btrfs_test_super(struct super_block *s, void *data) { - struct btrfs_fs_devices *test_fs_devices = data; + struct btrfs_root *test_root = data; struct btrfs_root *root = btrfs_sb(s); - return root->fs_info->fs_devices == test_fs_devices; + /* + * If this super block is going away, return false as it + * can't match as an existing super block. + */ + if (!atomic_read(&s->s_active)) + return 0; + return root->fs_info->fs_devices == test_root->fs_info->fs_devices; +} + +static int btrfs_set_super(struct super_block *s, void *data) +{ + s->s_fs_info = data; + + return set_anon_super(s, data); } + /* * Find a superblock for the given device / mount point. * * Note: This is based on get_sb_bdev from fs/super.c with a few additions * for multiple device setup. Make sure to keep it in sync. */ -static int btrfs_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { struct block_device *bdev = NULL; struct super_block *s; struct dentry *root; struct btrfs_fs_devices *fs_devices = NULL; + struct btrfs_root *tree_root = NULL; + struct btrfs_fs_info *fs_info = NULL; fmode_t mode = FMODE_READ; char *subvol_name = NULL; u64 subvol_objectid = 0; int error = 0; - int found = 0; if (!(flags & MS_RDONLY)) mode |= FMODE_WRITE; @@ -580,7 +610,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, &subvol_name, &subvol_objectid, &fs_devices); if (error) - return error; + return ERR_PTR(error); error = btrfs_scan_one_device(dev_name, mode, fs_type, &fs_devices); if (error) @@ -595,8 +625,24 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, goto error_close_devices; } + /* + * Setup a dummy root and fs_info for test/set super. This is because + * we don't actually fill this stuff out until open_ctree, but we need + * it for searching for existing supers, so this lets us do that and + * then open_ctree will properly initialize everything later. + */ + fs_info = kzalloc(sizeof(struct btrfs_fs_info), GFP_NOFS); + tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS); + if (!fs_info || !tree_root) { + error = -ENOMEM; + goto error_close_devices; + } + fs_info->tree_root = tree_root; + fs_info->fs_devices = fs_devices; + tree_root->fs_info = fs_info; + bdev = fs_devices->latest_bdev; - s = sget(fs_type, btrfs_test_super, set_anon_super, fs_devices); + s = sget(fs_type, btrfs_test_super, btrfs_set_super, tree_root); if (IS_ERR(s)) goto error_s; @@ -607,7 +653,6 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, goto error_close_devices; } - found = 1; btrfs_close_devices(fs_devices); } else { char b[BDEVNAME_SIZE]; @@ -629,7 +674,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, if (IS_ERR(root)) { error = PTR_ERR(root); deactivate_locked_super(s); - goto error; + goto error_free_subvol_name; } /* if they gave us a subvolume name bind mount into that */ if (strcmp(subvol_name, ".")) { @@ -640,36 +685,34 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, mutex_unlock(&root->d_inode->i_mutex); if (IS_ERR(new_root)) { + dput(root); deactivate_locked_super(s); error = PTR_ERR(new_root); - dput(root); - goto error_close_devices; + goto error_free_subvol_name; } if (!new_root->d_inode) { dput(root); dput(new_root); deactivate_locked_super(s); error = -ENXIO; - goto error_close_devices; + goto error_free_subvol_name; } dput(root); root = new_root; } - mnt->mnt_sb = s; - mnt->mnt_root = root; - kfree(subvol_name); - return 0; + return root; error_s: error = PTR_ERR(s); error_close_devices: btrfs_close_devices(fs_devices); + kfree(fs_info); + kfree(tree_root); error_free_subvol_name: kfree(subvol_name); -error: - return error; + return ERR_PTR(error); } static int btrfs_remount(struct super_block *sb, int *flags, char *data) @@ -716,18 +759,25 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) struct list_head *head = &root->fs_info->space_info; struct btrfs_space_info *found; u64 total_used = 0; + u64 total_used_data = 0; int bits = dentry->d_sb->s_blocksize_bits; __be32 *fsid = (__be32 *)root->fs_info->fsid; rcu_read_lock(); - list_for_each_entry_rcu(found, head, list) + list_for_each_entry_rcu(found, head, list) { + if (found->flags & (BTRFS_BLOCK_GROUP_METADATA | + BTRFS_BLOCK_GROUP_SYSTEM)) + total_used_data += found->disk_total; + else + total_used_data += found->disk_used; total_used += found->disk_used; + } rcu_read_unlock(); buf->f_namelen = BTRFS_NAME_LEN; buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits; buf->f_bfree = buf->f_blocks - (total_used >> bits); - buf->f_bavail = buf->f_bfree; + buf->f_bavail = buf->f_blocks - (total_used_data >> bits); buf->f_bsize = dentry->d_sb->s_blocksize; buf->f_type = BTRFS_SUPER_MAGIC; @@ -746,7 +796,7 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) static struct file_system_type btrfs_fs_type = { .owner = THIS_MODULE, .name = "btrfs", - .get_sb = btrfs_get_sb, + .mount = btrfs_mount, .kill_sb = kill_anon_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 66e4c66..f50e931 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -163,6 +163,7 @@ enum btrfs_trans_type { TRANS_START, TRANS_JOIN, TRANS_USERSPACE, + TRANS_JOIN_NOLOCK, }; static int may_wait_transaction(struct btrfs_root *root, int type) @@ -179,14 +180,14 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, { struct btrfs_trans_handle *h; struct btrfs_transaction *cur_trans; - int retries = 0; int ret; again: h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS); if (!h) return ERR_PTR(-ENOMEM); - mutex_lock(&root->fs_info->trans_mutex); + if (type != TRANS_JOIN_NOLOCK) + mutex_lock(&root->fs_info->trans_mutex); if (may_wait_transaction(root, type)) wait_current_trans(root); @@ -195,7 +196,8 @@ again: cur_trans = root->fs_info->running_transaction; cur_trans->use_count++; - mutex_unlock(&root->fs_info->trans_mutex); + if (type != TRANS_JOIN_NOLOCK) + mutex_unlock(&root->fs_info->trans_mutex); h->transid = cur_trans->transid; h->transaction = cur_trans; @@ -212,8 +214,7 @@ again: } if (num_items > 0) { - ret = btrfs_trans_reserve_metadata(h, root, num_items, - &retries); + ret = btrfs_trans_reserve_metadata(h, root, num_items); if (ret == -EAGAIN) { btrfs_commit_transaction(h, root); goto again; @@ -224,9 +225,11 @@ again: } } - mutex_lock(&root->fs_info->trans_mutex); + if (type != TRANS_JOIN_NOLOCK) + mutex_lock(&root->fs_info->trans_mutex); record_root_in_trans(h, root); - mutex_unlock(&root->fs_info->trans_mutex); + if (type != TRANS_JOIN_NOLOCK) + mutex_unlock(&root->fs_info->trans_mutex); if (!current->journal_info && type != TRANS_USERSPACE) current->journal_info = h; @@ -244,6 +247,12 @@ struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root, return start_transaction(root, 0, TRANS_JOIN); } +struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root, + int num_blocks) +{ + return start_transaction(root, 0, TRANS_JOIN_NOLOCK); +} + struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r, int num_blocks) { @@ -270,6 +279,58 @@ static noinline int wait_for_commit(struct btrfs_root *root, return 0; } +int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid) +{ + struct btrfs_transaction *cur_trans = NULL, *t; + int ret; + + mutex_lock(&root->fs_info->trans_mutex); + + ret = 0; + if (transid) { + if (transid <= root->fs_info->last_trans_committed) + goto out_unlock; + + /* find specified transaction */ + list_for_each_entry(t, &root->fs_info->trans_list, list) { + if (t->transid == transid) { + cur_trans = t; + break; + } + if (t->transid > transid) + break; + } + ret = -EINVAL; + if (!cur_trans) + goto out_unlock; /* bad transid */ + } else { + /* find newest transaction that is committing | committed */ + list_for_each_entry_reverse(t, &root->fs_info->trans_list, + list) { + if (t->in_commit) { + if (t->commit_done) + goto out_unlock; + cur_trans = t; + break; + } + } + if (!cur_trans) + goto out_unlock; /* nothing committing|committed */ + } + + cur_trans->use_count++; + mutex_unlock(&root->fs_info->trans_mutex); + + wait_for_commit(root, cur_trans); + + mutex_lock(&root->fs_info->trans_mutex); + put_transaction(cur_trans); + ret = 0; +out_unlock: + mutex_unlock(&root->fs_info->trans_mutex); + return ret; +} + #if 0 /* * rate limit against the drop_snapshot code. This helps to slow down new @@ -348,7 +409,7 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, } static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, - struct btrfs_root *root, int throttle) + struct btrfs_root *root, int throttle, int lock) { struct btrfs_transaction *cur_trans = trans->transaction; struct btrfs_fs_info *info = root->fs_info; @@ -376,26 +437,29 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, btrfs_trans_release_metadata(trans, root); - if (!root->fs_info->open_ioctl_trans && + if (lock && !root->fs_info->open_ioctl_trans && should_end_transaction(trans, root)) trans->transaction->blocked = 1; - if (cur_trans->blocked && !cur_trans->in_commit) { + if (lock && cur_trans->blocked && !cur_trans->in_commit) { if (throttle) return btrfs_commit_transaction(trans, root); else wake_up_process(info->transaction_kthread); } - mutex_lock(&info->trans_mutex); + if (lock) + mutex_lock(&info->trans_mutex); WARN_ON(cur_trans != info->running_transaction); WARN_ON(cur_trans->num_writers < 1); cur_trans->num_writers--; + smp_mb(); if (waitqueue_active(&cur_trans->writer_wait)) wake_up(&cur_trans->writer_wait); put_transaction(cur_trans); - mutex_unlock(&info->trans_mutex); + if (lock) + mutex_unlock(&info->trans_mutex); if (current->journal_info == trans) current->journal_info = NULL; @@ -411,13 +475,19 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, int btrfs_end_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - return __btrfs_end_transaction(trans, root, 0); + return __btrfs_end_transaction(trans, root, 0, 1); } int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - return __btrfs_end_transaction(trans, root, 1); + return __btrfs_end_transaction(trans, root, 1, 1); +} + +int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, + struct btrfs_root *root) +{ + return __btrfs_end_transaction(trans, root, 0, 0); } /* @@ -832,11 +902,11 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root *root = pending->root; struct btrfs_root *parent_root; struct inode *parent_inode; + struct dentry *parent; struct dentry *dentry; struct extent_buffer *tmp; struct extent_buffer *old; int ret; - int retries = 0; u64 to_reserve = 0; u64 index = 0; u64 objectid; @@ -858,7 +928,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, if (to_reserve > 0) { ret = btrfs_block_rsv_add(trans, root, &pending->block_rsv, - to_reserve, &retries); + to_reserve); if (ret) { pending->error = ret; goto fail; @@ -872,7 +942,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, trans->block_rsv = &pending->block_rsv; dentry = pending->dentry; - parent_inode = dentry->d_parent->d_inode; + parent = dget_parent(dentry); + parent_inode = parent->d_inode; parent_root = BTRFS_I(parent_inode)->root; record_root_in_trans(trans, parent_root); @@ -920,6 +991,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans, parent_inode->i_ino, index, dentry->d_name.name, dentry->d_name.len); BUG_ON(ret); + dput(parent); key.offset = (u64)-1; pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key); @@ -966,6 +1038,8 @@ static void update_super_roots(struct btrfs_root *root) super->root = root_item->bytenr; super->generation = root_item->generation; super->root_level = root_item->level; + if (super->cache_generation != 0 || btrfs_test_opt(root, SPACE_CACHE)) + super->cache_generation = root_item->generation; } int btrfs_transaction_in_commit(struct btrfs_fs_info *info) @@ -988,11 +1062,127 @@ int btrfs_transaction_blocked(struct btrfs_fs_info *info) return ret; } +/* + * wait for the current transaction commit to start and block subsequent + * transaction joins + */ +static void wait_current_trans_commit_start(struct btrfs_root *root, + struct btrfs_transaction *trans) +{ + DEFINE_WAIT(wait); + + if (trans->in_commit) + return; + + while (1) { + prepare_to_wait(&root->fs_info->transaction_blocked_wait, &wait, + TASK_UNINTERRUPTIBLE); + if (trans->in_commit) { + finish_wait(&root->fs_info->transaction_blocked_wait, + &wait); + break; + } + mutex_unlock(&root->fs_info->trans_mutex); + schedule(); + mutex_lock(&root->fs_info->trans_mutex); + finish_wait(&root->fs_info->transaction_blocked_wait, &wait); + } +} + +/* + * wait for the current transaction to start and then become unblocked. + * caller holds ref. + */ +static void wait_current_trans_commit_start_and_unblock(struct btrfs_root *root, + struct btrfs_transaction *trans) +{ + DEFINE_WAIT(wait); + + if (trans->commit_done || (trans->in_commit && !trans->blocked)) + return; + + while (1) { + prepare_to_wait(&root->fs_info->transaction_wait, &wait, + TASK_UNINTERRUPTIBLE); + if (trans->commit_done || + (trans->in_commit && !trans->blocked)) { + finish_wait(&root->fs_info->transaction_wait, + &wait); + break; + } + mutex_unlock(&root->fs_info->trans_mutex); + schedule(); + mutex_lock(&root->fs_info->trans_mutex); + finish_wait(&root->fs_info->transaction_wait, + &wait); + } +} + +/* + * commit transactions asynchronously. once btrfs_commit_transaction_async + * returns, any subsequent transaction will not be allowed to join. + */ +struct btrfs_async_commit { + struct btrfs_trans_handle *newtrans; + struct btrfs_root *root; + struct delayed_work work; +}; + +static void do_async_commit(struct work_struct *work) +{ + struct btrfs_async_commit *ac = + container_of(work, struct btrfs_async_commit, work.work); + + btrfs_commit_transaction(ac->newtrans, ac->root); + kfree(ac); +} + +int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + int wait_for_unblock) +{ + struct btrfs_async_commit *ac; + struct btrfs_transaction *cur_trans; + + ac = kmalloc(sizeof(*ac), GFP_NOFS); + BUG_ON(!ac); + + INIT_DELAYED_WORK(&ac->work, do_async_commit); + ac->root = root; + ac->newtrans = btrfs_join_transaction(root, 0); + + /* take transaction reference */ + mutex_lock(&root->fs_info->trans_mutex); + cur_trans = trans->transaction; + cur_trans->use_count++; + mutex_unlock(&root->fs_info->trans_mutex); + + btrfs_end_transaction(trans, root); + schedule_delayed_work(&ac->work, 0); + + /* wait for transaction to start and unblock */ + mutex_lock(&root->fs_info->trans_mutex); + if (wait_for_unblock) + wait_current_trans_commit_start_and_unblock(root, cur_trans); + else + wait_current_trans_commit_start(root, cur_trans); + put_transaction(cur_trans); + mutex_unlock(&root->fs_info->trans_mutex); + + return 0; +} + +/* + * btrfs_transaction state sequence: + * in_commit = 0, blocked = 0 (initial) + * in_commit = 1, blocked = 1 + * blocked = 0 + * commit_done = 1 + */ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root) { unsigned long joined = 0; - unsigned long timeout = 1; struct btrfs_transaction *cur_trans; struct btrfs_transaction *prev_trans = NULL; DEFINE_WAIT(wait); @@ -1039,6 +1229,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, trans->transaction->in_commit = 1; trans->transaction->blocked = 1; + wake_up(&root->fs_info->transaction_blocked_wait); + if (cur_trans->list.prev != &root->fs_info->trans_list) { prev_trans = list_entry(cur_trans->list.prev, struct btrfs_transaction, list); @@ -1063,11 +1255,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, snap_pending = 1; WARN_ON(cur_trans != trans->transaction); - if (cur_trans->num_writers > 1) - timeout = MAX_SCHEDULE_TIMEOUT; - else if (should_grow) - timeout = 1; - mutex_unlock(&root->fs_info->trans_mutex); if (flush_on_commit || snap_pending) { @@ -1089,8 +1276,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, TASK_UNINTERRUPTIBLE); smp_mb(); - if (cur_trans->num_writers > 1 || should_grow) - schedule_timeout(timeout); + if (cur_trans->num_writers > 1) + schedule_timeout(MAX_SCHEDULE_TIMEOUT); + else if (should_grow) + schedule_timeout(1); mutex_lock(&root->fs_info->trans_mutex); finish_wait(&cur_trans->writer_wait, &wait); diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index e104986..f104b57 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -87,12 +87,17 @@ static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans, int btrfs_end_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); +int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans, + struct btrfs_root *root); struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root, int num_items); struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root, int num_blocks); +struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root, + int num_blocks); struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r, int num_blocks); +int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid); int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans, @@ -104,6 +109,9 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); int btrfs_clean_old_snapshots(struct btrfs_root *root); int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root); +int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + int wait_for_unblock); int btrfs_end_transaction_throttle(struct btrfs_trans_handle *trans, struct btrfs_root *root); int btrfs_should_end_transaction(struct btrfs_trans_handle *trans, diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c index f7ac8e0..992ab42 100644 --- a/fs/btrfs/tree-defrag.c +++ b/fs/btrfs/tree-defrag.c @@ -36,7 +36,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, int ret = 0; int wret; int level; - int orig_level; int is_extent = 0; int next_key_ret = 0; u64 last_ret = 0; @@ -64,7 +63,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, return -ENOMEM; level = btrfs_header_level(root->node); - orig_level = level; if (level == 0) goto out; diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index fb102a9..054744a 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -786,7 +786,6 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, { struct inode *dir; int ret; - struct btrfs_key location; struct btrfs_inode_ref *ref; struct btrfs_dir_item *di; struct inode *inode; @@ -795,10 +794,6 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans, unsigned long ref_ptr; unsigned long ref_end; - location.objectid = key->objectid; - location.type = BTRFS_INODE_ITEM_KEY; - location.offset = 0; - /* * it is possible that we didn't log all the parent directories * for a given inode. If we don't find the dir, just don't @@ -1583,7 +1578,6 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb, struct btrfs_path *path; struct btrfs_root *root = wc->replay_dest; struct btrfs_key key; - u32 item_size; int level; int i; int ret; @@ -1601,7 +1595,6 @@ static int replay_one_buffer(struct btrfs_root *log, struct extent_buffer *eb, nritems = btrfs_header_nritems(eb); for (i = 0; i < nritems; i++) { btrfs_item_key_to_cpu(eb, &key, i); - item_size = btrfs_item_size_nr(eb, i); /* inode keys are done during the first stage */ if (key.type == BTRFS_INODE_ITEM_KEY && @@ -1668,7 +1661,6 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, struct walk_control *wc) { u64 root_owner; - u64 root_gen; u64 bytenr; u64 ptr_gen; struct extent_buffer *next; @@ -1698,7 +1690,6 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, parent = path->nodes[*level]; root_owner = btrfs_header_owner(parent); - root_gen = btrfs_header_generation(parent); next = btrfs_find_create_tree_block(root, bytenr, blocksize); @@ -1749,7 +1740,6 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans, struct walk_control *wc) { u64 root_owner; - u64 root_gen; int i; int slot; int ret; @@ -1757,8 +1747,6 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans, for (i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) { slot = path->slots[i]; if (slot + 1 < btrfs_header_nritems(path->nodes[i])) { - struct extent_buffer *node; - node = path->nodes[i]; path->slots[i]++; *level = i; WARN_ON(*level == 0); @@ -1771,7 +1759,6 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans, parent = path->nodes[*level + 1]; root_owner = btrfs_header_owner(parent); - root_gen = btrfs_header_generation(parent); wc->process_func(root, path->nodes[*level], wc, btrfs_header_generation(path->nodes[*level])); if (wc->free) { @@ -2273,7 +2260,7 @@ fail: } btrfs_end_log_trans(root); - return 0; + return err; } /* see comments for btrfs_del_dir_entries_in_log */ @@ -2729,7 +2716,6 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans, struct btrfs_key max_key; struct btrfs_root *log = root->log_root; struct extent_buffer *src = NULL; - u32 size; int err = 0; int ret; int nritems; @@ -2793,7 +2779,6 @@ again: break; src = path->nodes[0]; - size = btrfs_item_size_nr(src, path->slots[0]); if (ins_nr && ins_start_slot + ins_nr == path->slots[0]) { ins_nr++; goto next_slot; @@ -2884,6 +2869,7 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans, { int ret = 0; struct btrfs_root *root; + struct dentry *old_parent = NULL; /* * for regular files, if its inode is already on disk, we don't @@ -2925,10 +2911,13 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans, if (IS_ROOT(parent)) break; - parent = parent->d_parent; + parent = dget_parent(parent); + dput(old_parent); + old_parent = parent; inode = parent->d_inode; } + dput(old_parent); out: return ret; } @@ -2960,6 +2949,7 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, { int inode_only = exists_only ? LOG_INODE_EXISTS : LOG_INODE_ALL; struct super_block *sb; + struct dentry *old_parent = NULL; int ret = 0; u64 last_committed = root->fs_info->last_trans_committed; @@ -3031,10 +3021,13 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans, if (IS_ROOT(parent)) break; - parent = parent->d_parent; + parent = dget_parent(parent); + dput(old_parent); + old_parent = parent; } ret = 0; end_trans: + dput(old_parent); if (ret < 0) { BUG_ON(ret != -ENOSPC); root->fs_info->last_trans_log_full_commit = trans->transid; @@ -3054,8 +3047,13 @@ end_no_trans: int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct dentry *dentry) { - return btrfs_log_inode_parent(trans, root, dentry->d_inode, - dentry->d_parent, 0); + struct dentry *parent = dget_parent(dentry); + int ret; + + ret = btrfs_log_inode_parent(trans, root, dentry->d_inode, parent, 0); + dput(parent); + + return ret; } /* diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index e25e46a..6b98845 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -412,12 +412,16 @@ static noinline int device_list_add(const char *path, device->fs_devices = fs_devices; fs_devices->num_devices++; - } else if (strcmp(device->name, path)) { + } else if (!device->name || strcmp(device->name, path)) { name = kstrdup(path, GFP_NOFS); if (!name) return -ENOMEM; kfree(device->name); device->name = name; + if (device->missing) { + fs_devices->missing_devices--; + device->missing = 0; + } } if (found_transid > fs_devices->latest_trans) { @@ -1236,6 +1240,9 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) device->fs_devices->num_devices--; + if (device->missing) + root->fs_info->fs_devices->missing_devices--; + next_device = list_entry(root->fs_info->fs_devices->devices.next, struct btrfs_device, dev_list); if (device->bdev == root->fs_info->sb->s_bdev) @@ -1898,7 +1905,6 @@ int btrfs_balance(struct btrfs_root *dev_root) u64 size_to_free; struct btrfs_path *path; struct btrfs_key key; - struct btrfs_chunk *chunk; struct btrfs_root *chunk_root = dev_root->fs_info->chunk_root; struct btrfs_trans_handle *trans; struct btrfs_key found_key; @@ -1962,9 +1968,6 @@ int btrfs_balance(struct btrfs_root *dev_root) if (found_key.objectid != key.objectid) break; - chunk = btrfs_item_ptr(path->nodes[0], - path->slots[0], - struct btrfs_chunk); /* chunk zero is special */ if (found_key.offset == 0) break; @@ -3031,8 +3034,7 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, } bio->bi_sector = multi->stripes[dev_nr].physical >> 9; dev = multi->stripes[dev_nr].dev; - BUG_ON(rw == WRITE && !dev->writeable); - if (dev && dev->bdev) { + if (dev && dev->bdev && (rw != WRITE || dev->writeable)) { bio->bi_bdev = dev->bdev; if (async_submit) schedule_bio(root, dev, rw, bio); @@ -3085,7 +3087,9 @@ static struct btrfs_device *add_missing_dev(struct btrfs_root *root, device->devid = devid; device->work.func = pending_bios_fn; device->fs_devices = fs_devices; + device->missing = 1; fs_devices->num_devices++; + fs_devices->missing_devices++; spin_lock_init(&device->io_lock); INIT_LIST_HEAD(&device->dev_alloc_list); memcpy(device->uuid, dev_uuid, BTRFS_UUID_SIZE); @@ -3283,6 +3287,15 @@ static int read_one_dev(struct btrfs_root *root, device = add_missing_dev(root, devid, dev_uuid); if (!device) return -ENOMEM; + } else if (!device->missing) { + /* + * this happens when a device that was properly setup + * in the device info lists suddenly goes bad. + * device->bdev is NULL, and so we have to set + * device->missing to one here + */ + root->fs_info->fs_devices->missing_devices++; + device->missing = 1; } } diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 2b638b6..2740db49 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -44,6 +44,7 @@ struct btrfs_device { int writeable; int in_fs_metadata; + int missing; spinlock_t io_lock; @@ -93,6 +94,7 @@ struct btrfs_fs_devices { u64 num_devices; u64 open_devices; u64 rw_devices; + u64 missing_devices; u64 total_rw_bytes; struct block_device *latest_bdev; diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c index 88ecbb2..698fdd2 100644 --- a/fs/btrfs/xattr.c +++ b/fs/btrfs/xattr.c @@ -178,7 +178,6 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) struct inode *inode = dentry->d_inode; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_path *path; - struct btrfs_item *item; struct extent_buffer *leaf; struct btrfs_dir_item *di; int ret = 0, slot, advance; @@ -234,7 +233,6 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size) } advance = 1; - item = btrfs_item_nr(leaf, slot); btrfs_item_key_to_cpu(leaf, &found_key, slot); /* check to make sure this item is what we want */ diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index 3e2b90e..b9cd544 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -199,8 +199,6 @@ int btrfs_zlib_compress_pages(struct address_space *mapping, int nr_pages = 0; struct page *in_page = NULL; struct page *out_page = NULL; - int out_written = 0; - int in_read = 0; unsigned long bytes_left; *out_pages = 0; @@ -233,9 +231,6 @@ int btrfs_zlib_compress_pages(struct address_space *mapping, workspace->def_strm.avail_out = PAGE_CACHE_SIZE; workspace->def_strm.avail_in = min(len, PAGE_CACHE_SIZE); - out_written = 0; - in_read = 0; - while (workspace->def_strm.total_in < len) { ret = zlib_deflate(&workspace->def_strm, Z_SYNC_FLUSH); if (ret != Z_OK) { diff --git a/fs/buffer.c b/fs/buffer.c index 5930e38..2219a76 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1270,12 +1270,10 @@ static inline void check_irqs_on(void) static void bh_lru_install(struct buffer_head *bh) { struct buffer_head *evictee = NULL; - struct bh_lru *lru; check_irqs_on(); bh_lru_lock(); - lru = &__get_cpu_var(bh_lrus); - if (lru->bhs[0] != bh) { + if (__this_cpu_read(bh_lrus.bhs[0]) != bh) { struct buffer_head *bhs[BH_LRU_SIZE]; int in; int out = 0; @@ -1283,7 +1281,8 @@ static void bh_lru_install(struct buffer_head *bh) get_bh(bh); bhs[out++] = bh; for (in = 0; in < BH_LRU_SIZE; in++) { - struct buffer_head *bh2 = lru->bhs[in]; + struct buffer_head *bh2 = + __this_cpu_read(bh_lrus.bhs[in]); if (bh2 == bh) { __brelse(bh2); @@ -1298,7 +1297,7 @@ static void bh_lru_install(struct buffer_head *bh) } while (out < BH_LRU_SIZE) bhs[out++] = NULL; - memcpy(lru->bhs, bhs, sizeof(bhs)); + memcpy(__this_cpu_ptr(&bh_lrus.bhs), bhs, sizeof(bhs)); } bh_lru_unlock(); @@ -1313,23 +1312,22 @@ static struct buffer_head * lookup_bh_lru(struct block_device *bdev, sector_t block, unsigned size) { struct buffer_head *ret = NULL; - struct bh_lru *lru; unsigned int i; check_irqs_on(); bh_lru_lock(); - lru = &__get_cpu_var(bh_lrus); for (i = 0; i < BH_LRU_SIZE; i++) { - struct buffer_head *bh = lru->bhs[i]; + struct buffer_head *bh = __this_cpu_read(bh_lrus.bhs[i]); if (bh && bh->b_bdev == bdev && bh->b_blocknr == block && bh->b_size == size) { if (i) { while (i) { - lru->bhs[i] = lru->bhs[i - 1]; + __this_cpu_write(bh_lrus.bhs[i], + __this_cpu_read(bh_lrus.bhs[i - 1])); i--; } - lru->bhs[0] = bh; + __this_cpu_write(bh_lrus.bhs[0], bh); } get_bh(bh); ret = bh; @@ -3203,22 +3201,23 @@ static void recalc_bh_state(void) int i; int tot = 0; - if (__get_cpu_var(bh_accounting).ratelimit++ < 4096) + if (__this_cpu_inc_return(bh_accounting.ratelimit) - 1 < 4096) return; - __get_cpu_var(bh_accounting).ratelimit = 0; + __this_cpu_write(bh_accounting.ratelimit, 0); for_each_online_cpu(i) tot += per_cpu(bh_accounting, i).nr; buffer_heads_over_limit = (tot > max_buffer_heads); } - + struct buffer_head *alloc_buffer_head(gfp_t gfp_flags) { struct buffer_head *ret = kmem_cache_zalloc(bh_cachep, gfp_flags); if (ret) { INIT_LIST_HEAD(&ret->b_assoc_buffers); - get_cpu_var(bh_accounting).nr++; + preempt_disable(); + __this_cpu_inc(bh_accounting.nr); recalc_bh_state(); - put_cpu_var(bh_accounting); + preempt_enable(); } return ret; } @@ -3228,9 +3227,10 @@ void free_buffer_head(struct buffer_head *bh) { BUG_ON(!list_empty(&bh->b_assoc_buffers)); kmem_cache_free(bh_cachep, bh); - get_cpu_var(bh_accounting).nr--; + preempt_disable(); + __this_cpu_dec(bh_accounting.nr); recalc_bh_state(); - put_cpu_var(bh_accounting); + preempt_enable(); } EXPORT_SYMBOL(free_buffer_head); @@ -3243,9 +3243,8 @@ static void buffer_exit_cpu(int cpu) brelse(b->bhs[i]); b->bhs[i] = NULL; } - get_cpu_var(bh_accounting).nr += per_cpu(bh_accounting, cpu).nr; + this_cpu_add(bh_accounting.nr, per_cpu(bh_accounting, cpu).nr); per_cpu(bh_accounting, cpu).nr = 0; - put_cpu_var(bh_accounting); } static int buffer_cpu_notify(struct notifier_block *self, diff --git a/fs/ceph/Makefile b/fs/ceph/Makefile index 9e6c4f2..bd35212 100644 --- a/fs/ceph/Makefile +++ b/fs/ceph/Makefile @@ -2,31 +2,10 @@ # Makefile for CEPH filesystem. # -ifneq ($(KERNELRELEASE),) - obj-$(CONFIG_CEPH_FS) += ceph.o -ceph-objs := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \ +ceph-y := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \ export.o caps.o snap.o xattr.o \ mds_client.o mdsmap.o strings.o ceph_frag.o \ debugfs.o -else -#Otherwise we were called directly from the command -# line; invoke the kernel build system. - -KERNELDIR ?= /lib/modules/$(shell uname -r)/build -PWD := $(shell pwd) - -default: all - -all: - $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_CEPH_FS=m modules - -modules_install: - $(MAKE) -C $(KERNELDIR) M=$(PWD) CONFIG_CEPH_FS=m modules_install - -clean: - $(MAKE) -C $(KERNELDIR) M=$(PWD) clean - -endif diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index e9c874a..561438b 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -204,7 +204,7 @@ static int readpage_nounlock(struct file *filp, struct page *page) err = ceph_osdc_readpages(osdc, ceph_vino(inode), &ci->i_layout, page->index << PAGE_CACHE_SHIFT, &len, ci->i_truncate_seq, ci->i_truncate_size, - &page, 1); + &page, 1, 0); if (err == -ENOENT) err = 0; if (err < 0) { @@ -287,7 +287,7 @@ static int ceph_readpages(struct file *file, struct address_space *mapping, rc = ceph_osdc_readpages(osdc, ceph_vino(inode), &ci->i_layout, offset, &len, ci->i_truncate_seq, ci->i_truncate_size, - pages, nr_pages); + pages, nr_pages, 0); if (rc == -ENOENT) rc = 0; if (rc < 0) @@ -774,7 +774,7 @@ get_more_pages: snapc, do_sync, ci->i_truncate_seq, ci->i_truncate_size, - &inode->i_mtime, true, 1); + &inode->i_mtime, true, 1, 0); max_pages = req->r_num_pages; alloc_page_vec(fsc, req); diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 98ab13e..60d27bc 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -1430,8 +1430,8 @@ static int try_nonblocking_invalidate(struct inode *inode) invalidating_gen == ci->i_rdcache_gen) { /* success. */ dout("try_nonblocking_invalidate %p success\n", inode); - ci->i_rdcache_gen = 0; - ci->i_rdcache_revoking = 0; + /* save any racing async invalidate some trouble */ + ci->i_rdcache_revoking = ci->i_rdcache_gen - 1; return 0; } dout("try_nonblocking_invalidate %p failed\n", inode); @@ -2273,8 +2273,7 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, { struct ceph_inode_info *ci = ceph_inode(inode); int mds = session->s_mds; - unsigned seq = le32_to_cpu(grant->seq); - unsigned issue_seq = le32_to_cpu(grant->issue_seq); + int seq = le32_to_cpu(grant->seq); int newcaps = le32_to_cpu(grant->caps); int issued, implemented, used, wanted, dirty; u64 size = le64_to_cpu(grant->size); @@ -2286,8 +2285,8 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, int revoked_rdcache = 0; int queue_invalidate = 0; - dout("handle_cap_grant inode %p cap %p mds%d seq %u/%u %s\n", - inode, cap, mds, seq, issue_seq, ceph_cap_string(newcaps)); + dout("handle_cap_grant inode %p cap %p mds%d seq %d %s\n", + inode, cap, mds, seq, ceph_cap_string(newcaps)); dout(" size %llu max_size %llu, i_size %llu\n", size, max_size, inode->i_size); @@ -2383,7 +2382,6 @@ static void handle_cap_grant(struct inode *inode, struct ceph_mds_caps *grant, } cap->seq = seq; - cap->issue_seq = issue_seq; /* file layout may have changed */ ci->i_layout = grant->layout; @@ -2691,6 +2689,11 @@ static void handle_cap_import(struct ceph_mds_client *mdsc, NULL /* no caps context */); try_flush_caps(inode, session, NULL); up_read(&mdsc->snap_rwsem); + + /* make sure we re-request max_size, if necessary */ + spin_lock(&inode->i_lock); + ci->i_requested_max_size = 0; + spin_unlock(&inode->i_lock); } /* diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c index 7ae1b3d..08f65fa 100644 --- a/fs/ceph/debugfs.c +++ b/fs/ceph/debugfs.c @@ -60,10 +60,13 @@ static int mdsc_show(struct seq_file *s, void *p) for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) { req = rb_entry(rp, struct ceph_mds_request, r_node); - if (req->r_request) - seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds); - else + if (req->r_request && req->r_session) + seq_printf(s, "%lld\tmds%d\t", req->r_tid, + req->r_session->s_mds); + else if (!req->r_request) seq_printf(s, "%lld\t(no request)\t", req->r_tid); + else + seq_printf(s, "%lld\t(no session)\t", req->r_tid); seq_printf(s, "%s", ceph_mds_op_name(req->r_op)); diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index e0a2dc6..0bc68de 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -40,12 +40,13 @@ int ceph_init_dentry(struct dentry *dentry) if (dentry->d_fsdata) return 0; - if (ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) - dentry->d_op = &ceph_dentry_ops; + if (dentry->d_parent == NULL || /* nfs fh_to_dentry */ + ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) + d_set_d_op(dentry, &ceph_dentry_ops); else if (ceph_snap(dentry->d_parent->d_inode) == CEPH_SNAPDIR) - dentry->d_op = &ceph_snapdir_dentry_ops; + d_set_d_op(dentry, &ceph_snapdir_dentry_ops); else - dentry->d_op = &ceph_snap_dentry_ops; + d_set_d_op(dentry, &ceph_snap_dentry_ops); di = kmem_cache_alloc(ceph_dentry_cachep, GFP_NOFS | __GFP_ZERO); if (!di) @@ -111,11 +112,11 @@ static int __dcache_readdir(struct file *filp, dout("__dcache_readdir %p at %llu (last %p)\n", dir, filp->f_pos, last); - spin_lock(&dcache_lock); + spin_lock(&parent->d_lock); /* start at beginning? */ - if (filp->f_pos == 2 || (last && - filp->f_pos < ceph_dentry(last)->offset)) { + if (filp->f_pos == 2 || last == NULL || + filp->f_pos < ceph_dentry(last)->offset) { if (list_empty(&parent->d_subdirs)) goto out_unlock; p = parent->d_subdirs.prev; @@ -135,6 +136,7 @@ more: fi->at_end = 1; goto out_unlock; } + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); if (!d_unhashed(dentry) && dentry->d_inode && ceph_snap(dentry->d_inode) != CEPH_SNAPDIR && ceph_ino(dentry->d_inode) != CEPH_INO_CEPH && @@ -144,13 +146,15 @@ more: dentry->d_name.len, dentry->d_name.name, di->offset, filp->f_pos, d_unhashed(dentry) ? " unhashed" : "", !dentry->d_inode ? " null" : ""); + spin_unlock(&dentry->d_lock); p = p->prev; dentry = list_entry(p, struct dentry, d_u.d_child); di = ceph_dentry(dentry); } - atomic_inc(&dentry->d_count); - spin_unlock(&dcache_lock); + dget_dlock(dentry); + spin_unlock(&dentry->d_lock); + spin_unlock(&parent->d_lock); dout(" %llu (%llu) dentry %p %.*s %p\n", di->offset, filp->f_pos, dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode); @@ -176,19 +180,19 @@ more: filp->f_pos++; - /* make sure a dentry wasn't dropped while we didn't have dcache_lock */ + /* make sure a dentry wasn't dropped while we didn't have parent lock */ if (!ceph_i_test(dir, CEPH_I_COMPLETE)) { dout(" lost I_COMPLETE on %p; falling back to mds\n", dir); err = -EAGAIN; goto out; } - spin_lock(&dcache_lock); + spin_lock(&parent->d_lock); p = p->prev; /* advance to next dentry */ goto more; out_unlock: - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); out: if (last) dput(last); @@ -336,7 +340,10 @@ more: if (req->r_reply_info.dir_end) { kfree(fi->last_name); fi->last_name = NULL; - fi->next_offset = 2; + if (ceph_frag_is_rightmost(frag)) + fi->next_offset = 2; + else + fi->next_offset = 0; } else { rinfo = &req->r_reply_info; err = note_last_dentry(fi, @@ -355,18 +362,22 @@ more: u64 pos = ceph_make_fpos(frag, off); struct ceph_mds_reply_inode *in = rinfo->dir_in[off - fi->offset].in; + struct ceph_vino vino; + ino_t ino; + dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n", off, off - fi->offset, rinfo->dir_nr, pos, rinfo->dir_dname_len[off - fi->offset], rinfo->dir_dname[off - fi->offset], in); BUG_ON(!in); ftype = le32_to_cpu(in->mode) >> 12; + vino.ino = le64_to_cpu(in->ino); + vino.snap = le64_to_cpu(in->snapid); + ino = ceph_vino_to_ino(vino); if (filldir(dirent, rinfo->dir_dname[off - fi->offset], rinfo->dir_dname_len[off - fi->offset], - pos, - le64_to_cpu(in->ino), - ftype) < 0) { + pos, ino, ftype) < 0) { dout("filldir stopping us...\n"); return 0; } @@ -414,6 +425,7 @@ static void reset_readdir(struct ceph_file_info *fi) fi->last_readdir = NULL; } kfree(fi->last_name); + fi->last_name = NULL; fi->next_offset = 2; /* compensate for . and .. */ if (fi->dentry) { dput(fi->dentry); @@ -978,7 +990,12 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry) */ static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct inode *dir = dentry->d_parent->d_inode; + struct inode *dir; + + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + dir = dentry->d_parent->d_inode; dout("d_revalidate %p '%.*s' inode %p offset %lld\n", dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode, @@ -1207,6 +1224,26 @@ void ceph_dentry_lru_del(struct dentry *dn) } } +/* + * Return name hash for a given dentry. This is dependent on + * the parent directory's hash function. + */ +unsigned ceph_dentry_hash(struct dentry *dn) +{ + struct inode *dir = dn->d_parent->d_inode; + struct ceph_inode_info *dci = ceph_inode(dir); + + switch (dci->i_dir_layout.dl_dir_hash) { + case 0: /* for backward compat */ + case CEPH_STR_HASH_LINUX: + return dn->d_name.hash; + + default: + return ceph_str_hash(dci->i_dir_layout.dl_dir_hash, + dn->d_name.name, dn->d_name.len); + } +} + const struct file_operations ceph_dir_fops = { .read = ceph_read_dir, .readdir = ceph_readdir, diff --git a/fs/ceph/export.c b/fs/ceph/export.c index 2297d94..e410561 100644 --- a/fs/ceph/export.c +++ b/fs/ceph/export.c @@ -59,7 +59,7 @@ static int ceph_encode_fh(struct dentry *dentry, u32 *rawfh, int *max_len, dout("encode_fh %p connectable\n", dentry); cfh->ino = ceph_ino(dentry->d_inode); cfh->parent_ino = ceph_ino(parent->d_inode); - cfh->parent_name_hash = parent->d_name.hash; + cfh->parent_name_hash = ceph_dentry_hash(parent); *max_len = connected_handle_length; type = 2; } else if (*max_len >= handle_length) { diff --git a/fs/ceph/file.c b/fs/ceph/file.c index e77c28c..7d0e4a8 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -154,11 +154,13 @@ int ceph_open(struct inode *inode, struct file *file) } /* - * No need to block if we have any caps. Update wanted set + * No need to block if we have caps on the auth MDS (for + * write) or any MDS (for read). Update wanted set * asynchronously. */ spin_lock(&inode->i_lock); - if (__ceph_is_any_real_caps(ci)) { + if (__ceph_is_any_real_caps(ci) && + (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { int mds_wanted = __ceph_caps_mds_wanted(ci); int issued = __ceph_caps_issued(ci, NULL); @@ -280,11 +282,13 @@ int ceph_release(struct inode *inode, struct file *file) static int striped_read(struct inode *inode, u64 off, u64 len, struct page **pages, int num_pages, - int *checkeof) + int *checkeof, bool align_to_pages, + unsigned long buf_align) { struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_inode_info *ci = ceph_inode(inode); u64 pos, this_len; + int io_align, page_align; int page_off = off & ~PAGE_CACHE_MASK; /* first byte's offset in page */ int left, pages_left; int read; @@ -300,14 +304,19 @@ static int striped_read(struct inode *inode, page_pos = pages; pages_left = num_pages; read = 0; + io_align = off & ~PAGE_MASK; more: + if (align_to_pages) + page_align = (pos - io_align + buf_align) & ~PAGE_MASK; + else + page_align = pos & ~PAGE_MASK; this_len = left; ret = ceph_osdc_readpages(&fsc->client->osdc, ceph_vino(inode), &ci->i_layout, pos, &this_len, ci->i_truncate_seq, ci->i_truncate_size, - page_pos, pages_left); + page_pos, pages_left, page_align); hit_stripe = this_len < left; was_short = ret >= 0 && ret < this_len; if (ret == -ENOENT) @@ -368,32 +377,34 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, struct inode *inode = file->f_dentry->d_inode; struct page **pages; u64 off = *poff; - int num_pages = calc_pages_for(off, len); - int ret; + int num_pages, ret; dout("sync_read on file %p %llu~%u %s\n", file, off, len, (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); if (file->f_flags & O_DIRECT) { - pages = ceph_get_direct_page_vector(data, num_pages, off, len); - - /* - * flush any page cache pages in this range. this - * will make concurrent normal and O_DIRECT io slow, - * but it will at least behave sensibly when they are - * in sequence. - */ + num_pages = calc_pages_for((unsigned long)data, len); + pages = ceph_get_direct_page_vector(data, num_pages, true); } else { + num_pages = calc_pages_for(off, len); pages = ceph_alloc_page_vector(num_pages, GFP_NOFS); } if (IS_ERR(pages)) return PTR_ERR(pages); + /* + * flush any page cache pages in this range. this + * will make concurrent normal and sync io slow, + * but it will at least behave sensibly when they are + * in sequence. + */ ret = filemap_write_and_wait(inode->i_mapping); if (ret < 0) goto done; - ret = striped_read(inode, off, len, pages, num_pages, checkeof); + ret = striped_read(inode, off, len, pages, num_pages, checkeof, + file->f_flags & O_DIRECT, + (unsigned long)data & ~PAGE_MASK); if (ret >= 0 && (file->f_flags & O_DIRECT) == 0) ret = ceph_copy_page_vector_to_user(pages, data, off, ret); @@ -402,7 +413,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, done: if (file->f_flags & O_DIRECT) - ceph_put_page_vector(pages, num_pages); + ceph_put_page_vector(pages, num_pages, true); else ceph_release_page_vector(pages, num_pages); dout("sync_read result %d\n", ret); @@ -448,6 +459,8 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data, int flags; int do_sync = 0; int check_caps = 0; + int page_align, io_align; + unsigned long buf_align; int ret; struct timespec mtime = CURRENT_TIME; @@ -462,6 +475,9 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data, else pos = *offset; + io_align = pos & ~PAGE_MASK; + buf_align = (unsigned long)data & ~PAGE_MASK; + ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + left); if (ret < 0) return ret; @@ -486,20 +502,27 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data, */ more: len = left; + if (file->f_flags & O_DIRECT) { + /* write from beginning of first page, regardless of + io alignment */ + page_align = (pos - io_align + buf_align) & ~PAGE_MASK; + num_pages = calc_pages_for((unsigned long)data, len); + } else { + page_align = pos & ~PAGE_MASK; + num_pages = calc_pages_for(pos, len); + } req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, ceph_vino(inode), pos, &len, CEPH_OSD_OP_WRITE, flags, ci->i_snap_realm->cached_context, do_sync, ci->i_truncate_seq, ci->i_truncate_size, - &mtime, false, 2); + &mtime, false, 2, page_align); if (!req) return -ENOMEM; - num_pages = calc_pages_for(pos, len); - if (file->f_flags & O_DIRECT) { - pages = ceph_get_direct_page_vector(data, num_pages, pos, len); + pages = ceph_get_direct_page_vector(data, num_pages, false); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto out; @@ -549,7 +572,7 @@ more: } if (file->f_flags & O_DIRECT) - ceph_put_page_vector(pages, num_pages); + ceph_put_page_vector(pages, num_pages, false); else if (file->f_flags & O_SYNC) ceph_release_page_vector(pages, num_pages); diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 1d6a45b..e835eff 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2,7 +2,6 @@ #include <linux/module.h> #include <linux/fs.h> -#include <linux/smp_lock.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/uaccess.h> @@ -298,6 +297,8 @@ struct inode *ceph_alloc_inode(struct super_block *sb) ci->i_release_count = 0; ci->i_symlink = NULL; + memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); + ci->i_fragtree = RB_ROOT; mutex_init(&ci->i_fragtree_mutex); @@ -369,6 +370,15 @@ struct inode *ceph_alloc_inode(struct super_block *sb) return &ci->vfs_inode; } +static void ceph_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct ceph_inode_info *ci = ceph_inode(inode); + + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(ceph_inode_cachep, ci); +} + void ceph_destroy_inode(struct inode *inode) { struct ceph_inode_info *ci = ceph_inode(inode); @@ -408,7 +418,7 @@ void ceph_destroy_inode(struct inode *inode) if (ci->i_xattrs.prealloc_blob) ceph_buffer_put(ci->i_xattrs.prealloc_blob); - kmem_cache_free(ceph_inode_cachep, ci); + call_rcu(&inode->i_rcu, ceph_i_callback); } @@ -471,7 +481,9 @@ void ceph_fill_file_time(struct inode *inode, int issued, if (issued & (CEPH_CAP_FILE_EXCL| CEPH_CAP_FILE_WR| - CEPH_CAP_FILE_BUFFER)) { + CEPH_CAP_FILE_BUFFER| + CEPH_CAP_AUTH_EXCL| + CEPH_CAP_XATTR_EXCL)) { if (timespec_compare(ctime, &inode->i_ctime) > 0) { dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n", inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec, @@ -511,7 +523,7 @@ void ceph_fill_file_time(struct inode *inode, int issued, warn = 1; } } else { - /* we have no write caps; whatever the MDS says is true */ + /* we have no write|excl caps; whatever the MDS says is true */ if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) { inode->i_ctime = *ctime; inode->i_mtime = *mtime; @@ -567,12 +579,17 @@ static int fill_inode(struct inode *inode, /* * provided version will be odd if inode value is projected, - * even if stable. skip the update if we have a newer info - * (e.g., due to inode info racing form multiple MDSs), or if - * we are getting projected (unstable) inode info. + * even if stable. skip the update if we have newer stable + * info (ours>=theirs, e.g. due to racing mds replies), unless + * we are getting projected (unstable) info (in which case the + * version is odd, and we want ours>theirs). + * us them + * 2 2 skip + * 3 2 skip + * 3 3 update */ if (le64_to_cpu(info->version) > 0 && - (ci->i_version & ~1) > le64_to_cpu(info->version)) + (ci->i_version & ~1) >= le64_to_cpu(info->version)) goto no_change; issued = __ceph_caps_issued(ci, &implemented); @@ -606,7 +623,14 @@ static int fill_inode(struct inode *inode, le32_to_cpu(info->time_warp_seq), &ctime, &mtime, &atime); - ci->i_max_size = le64_to_cpu(info->max_size); + /* only update max_size on auth cap */ + if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) && + ci->i_max_size != le64_to_cpu(info->max_size)) { + dout("max_size %lld -> %llu\n", ci->i_max_size, + le64_to_cpu(info->max_size)); + ci->i_max_size = le64_to_cpu(info->max_size); + } + ci->i_layout = info->layout; inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; @@ -667,6 +691,8 @@ static int fill_inode(struct inode *inode, inode->i_op = &ceph_dir_iops; inode->i_fop = &ceph_dir_fops; + ci->i_dir_layout = iinfo->dir_layout; + ci->i_files = le64_to_cpu(info->files); ci->i_subdirs = le64_to_cpu(info->subdirs); ci->i_rbytes = le64_to_cpu(info->rbytes); @@ -828,13 +854,13 @@ static void ceph_set_dentry_offset(struct dentry *dn) di->offset = ceph_inode(inode)->i_max_offset++; spin_unlock(&inode->i_lock); - spin_lock(&dcache_lock); - spin_lock(&dn->d_lock); + spin_lock(&dir->d_lock); + spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); list_move(&dn->d_u.d_child, &dir->d_subdirs); dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, dn->d_u.d_child.prev, dn->d_u.d_child.next); spin_unlock(&dn->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&dir->d_lock); } /* @@ -866,8 +892,8 @@ static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, } else if (realdn) { dout("dn %p (%d) spliced with %p (%d) " "inode %p ino %llx.%llx\n", - dn, atomic_read(&dn->d_count), - realdn, atomic_read(&realdn->d_count), + dn, dn->d_count, + realdn, realdn->d_count, realdn->d_inode, ceph_vinop(realdn->d_inode)); dput(dn); dn = realdn; @@ -1055,7 +1081,8 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, ininfo = rinfo->targeti.in; vino.ino = le64_to_cpu(ininfo->ino); vino.snap = le64_to_cpu(ininfo->snapid); - if (!dn->d_inode) { + in = dn->d_inode; + if (!in) { in = ceph_get_inode(sb, vino); if (IS_ERR(in)) { pr_err("fill_trace bad get_inode " @@ -1217,11 +1244,11 @@ retry_lookup: goto retry_lookup; } else { /* reorder parent's d_subdirs */ - spin_lock(&dcache_lock); - spin_lock(&dn->d_lock); + spin_lock(&parent->d_lock); + spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); list_move(&dn->d_u.d_child, &parent->d_subdirs); spin_unlock(&dn->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); } di = dn->d_fsdata; @@ -1386,11 +1413,8 @@ static void ceph_invalidate_work(struct work_struct *work) spin_lock(&inode->i_lock); dout("invalidate_pages %p gen %d revoking %d\n", inode, ci->i_rdcache_gen, ci->i_rdcache_revoking); - if (ci->i_rdcache_gen == 0 || - ci->i_rdcache_revoking != ci->i_rdcache_gen) { - BUG_ON(ci->i_rdcache_revoking > ci->i_rdcache_gen); + if (ci->i_rdcache_revoking != ci->i_rdcache_gen) { /* nevermind! */ - ci->i_rdcache_revoking = 0; spin_unlock(&inode->i_lock); goto out; } @@ -1400,15 +1424,16 @@ static void ceph_invalidate_work(struct work_struct *work) ceph_invalidate_nondirty_pages(inode->i_mapping); spin_lock(&inode->i_lock); - if (orig_gen == ci->i_rdcache_gen) { + if (orig_gen == ci->i_rdcache_gen && + orig_gen == ci->i_rdcache_revoking) { dout("invalidate_pages %p gen %d successful\n", inode, ci->i_rdcache_gen); - ci->i_rdcache_gen = 0; - ci->i_rdcache_revoking = 0; + ci->i_rdcache_revoking--; check = 1; } else { - dout("invalidate_pages %p gen %d raced, gen now %d\n", - inode, orig_gen, ci->i_rdcache_gen); + dout("invalidate_pages %p gen %d raced, now %d revoking %d\n", + inode, orig_gen, ci->i_rdcache_gen, + ci->i_rdcache_revoking); } spin_unlock(&inode->i_lock); @@ -1739,7 +1764,7 @@ int ceph_do_getattr(struct inode *inode, int mask) return 0; } - dout("do_getattr inode %p mask %s\n", inode, ceph_cap_string(mask)); + dout("do_getattr inode %p mask %s mode 0%o\n", inode, ceph_cap_string(mask), inode->i_mode); if (ceph_caps_issued_mask(ceph_inode(inode), mask, 1)) return 0; @@ -1760,12 +1785,17 @@ int ceph_do_getattr(struct inode *inode, int mask) * Check inode permissions. We verify we have a valid value for * the AUTH cap, then call the generic handler. */ -int ceph_permission(struct inode *inode, int mask) +int ceph_permission(struct inode *inode, int mask, unsigned int flags) { - int err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); + int err; + + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + + err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED); if (!err) - err = generic_permission(inode, mask, NULL); + err = generic_permission(inode, mask, flags, NULL); return err; } diff --git a/fs/ceph/ioctl.h b/fs/ceph/ioctl.h index a6ce54e..52e8fd7 100644 --- a/fs/ceph/ioctl.h +++ b/fs/ceph/ioctl.h @@ -4,7 +4,7 @@ #include <linux/ioctl.h> #include <linux/types.h> -#define CEPH_IOCTL_MAGIC 0x98 +#define CEPH_IOCTL_MAGIC 0x97 /* just use u64 to align sanely on all archs */ struct ceph_ioctl_layout { diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index 40abde9..476b329 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -11,40 +11,68 @@ * Implement fcntl and flock locking functions. */ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file, - u64 pid, u64 pid_ns, - int cmd, u64 start, u64 length, u8 wait) + int cmd, u8 wait, struct file_lock *fl) { struct inode *inode = file->f_dentry->d_inode; struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc; struct ceph_mds_request *req; int err; + u64 length = 0; req = ceph_mdsc_create_request(mdsc, operation, USE_AUTH_MDS); if (IS_ERR(req)) return PTR_ERR(req); req->r_inode = igrab(inode); + /* mds requires start and length rather than start and end */ + if (LLONG_MAX == fl->fl_end) + length = 0; + else + length = fl->fl_end - fl->fl_start + 1; + dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, " "length: %llu, wait: %d, type`: %d", (int)lock_type, - (int)operation, pid, start, length, wait, cmd); + (int)operation, (u64)fl->fl_pid, fl->fl_start, + length, wait, fl->fl_type); + req->r_args.filelock_change.rule = lock_type; req->r_args.filelock_change.type = cmd; - req->r_args.filelock_change.pid = cpu_to_le64(pid); + req->r_args.filelock_change.pid = cpu_to_le64((u64)fl->fl_pid); /* This should be adjusted, but I'm not sure if namespaces actually get id numbers*/ req->r_args.filelock_change.pid_namespace = - cpu_to_le64((u64)pid_ns); - req->r_args.filelock_change.start = cpu_to_le64(start); + cpu_to_le64((u64)(unsigned long)fl->fl_nspid); + req->r_args.filelock_change.start = cpu_to_le64(fl->fl_start); req->r_args.filelock_change.length = cpu_to_le64(length); req->r_args.filelock_change.wait = wait; err = ceph_mdsc_do_request(mdsc, inode, req); + + if ( operation == CEPH_MDS_OP_GETFILELOCK){ + fl->fl_pid = le64_to_cpu(req->r_reply_info.filelock_reply->pid); + if (CEPH_LOCK_SHARED == req->r_reply_info.filelock_reply->type) + fl->fl_type = F_RDLCK; + else if (CEPH_LOCK_EXCL == req->r_reply_info.filelock_reply->type) + fl->fl_type = F_WRLCK; + else + fl->fl_type = F_UNLCK; + + fl->fl_start = le64_to_cpu(req->r_reply_info.filelock_reply->start); + length = le64_to_cpu(req->r_reply_info.filelock_reply->start) + + le64_to_cpu(req->r_reply_info.filelock_reply->length); + if (length >= 1) + fl->fl_end = length -1; + else + fl->fl_end = 0; + + } ceph_mdsc_put_request(req); dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, " - "length: %llu, wait: %d, type`: %d err code %d", (int)lock_type, - (int)operation, pid, start, length, wait, cmd, err); + "length: %llu, wait: %d, type`: %d, err code %d", (int)lock_type, + (int)operation, (u64)fl->fl_pid, fl->fl_start, + length, wait, fl->fl_type, err); return err; } @@ -54,7 +82,6 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file, */ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) { - u64 length; u8 lock_cmd; int err; u8 wait = 0; @@ -76,29 +103,20 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) else lock_cmd = CEPH_LOCK_UNLOCK; - if (LLONG_MAX == fl->fl_end) - length = 0; - else - length = fl->fl_end - fl->fl_start + 1; - - err = ceph_lock_message(CEPH_LOCK_FCNTL, op, file, - (u64)fl->fl_pid, - (u64)(unsigned long)fl->fl_nspid, - lock_cmd, fl->fl_start, - length, wait); + err = ceph_lock_message(CEPH_LOCK_FCNTL, op, file, lock_cmd, wait, fl); if (!err) { - dout("mds locked, locking locally"); - err = posix_lock_file(file, fl, NULL); - if (err && (CEPH_MDS_OP_SETFILELOCK == op)) { - /* undo! This should only happen if the kernel detects - * local deadlock. */ - ceph_lock_message(CEPH_LOCK_FCNTL, op, file, - (u64)fl->fl_pid, - (u64)(unsigned long)fl->fl_nspid, - CEPH_LOCK_UNLOCK, fl->fl_start, - length, 0); - dout("got %d on posix_lock_file, undid lock", err); + if ( op != CEPH_MDS_OP_GETFILELOCK ){ + dout("mds locked, locking locally"); + err = posix_lock_file(file, fl, NULL); + if (err && (CEPH_MDS_OP_SETFILELOCK == op)) { + /* undo! This should only happen if the kernel detects + * local deadlock. */ + ceph_lock_message(CEPH_LOCK_FCNTL, op, file, + CEPH_LOCK_UNLOCK, 0, fl); + dout("got %d on posix_lock_file, undid lock", err); + } } + } else { dout("mds returned error code %d", err); } @@ -107,7 +125,6 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) int ceph_flock(struct file *file, int cmd, struct file_lock *fl) { - u64 length; u8 lock_cmd; int err; u8 wait = 1; @@ -127,26 +144,15 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl) lock_cmd = CEPH_LOCK_EXCL; else lock_cmd = CEPH_LOCK_UNLOCK; - /* mds requires start and length rather than start and end */ - if (LLONG_MAX == fl->fl_end) - length = 0; - else - length = fl->fl_end - fl->fl_start + 1; err = ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK, - file, (u64)fl->fl_pid, - (u64)(unsigned long)fl->fl_nspid, - lock_cmd, fl->fl_start, - length, wait); + file, lock_cmd, wait, fl); if (!err) { err = flock_lock_file_wait(file, fl); if (err) { ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK, - file, (u64)fl->fl_pid, - (u64)(unsigned long)fl->fl_nspid, - CEPH_LOCK_UNLOCK, fl->fl_start, - length, 0); + file, CEPH_LOCK_UNLOCK, 0, fl); dout("got %d on flock_lock_file_wait, undid lock", err); } } else { diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 3142b15..1e30d19 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -6,7 +6,6 @@ #include <linux/sched.h> #include <linux/debugfs.h> #include <linux/seq_file.h> -#include <linux/smp_lock.h> #include "super.h" #include "mds_client.h" @@ -61,7 +60,8 @@ static const struct ceph_connection_operations mds_con_ops; * parse individual inode info */ static int parse_reply_info_in(void **p, void *end, - struct ceph_mds_reply_info_in *info) + struct ceph_mds_reply_info_in *info, + int features) { int err = -EIO; @@ -75,6 +75,12 @@ static int parse_reply_info_in(void **p, void *end, info->symlink = *p; *p += info->symlink_len; + if (features & CEPH_FEATURE_DIRLAYOUTHASH) + ceph_decode_copy_safe(p, end, &info->dir_layout, + sizeof(info->dir_layout), bad); + else + memset(&info->dir_layout, 0, sizeof(info->dir_layout)); + ceph_decode_32_safe(p, end, info->xattr_len, bad); ceph_decode_need(p, end, info->xattr_len, bad); info->xattr_data = *p; @@ -89,12 +95,13 @@ bad: * target inode. */ static int parse_reply_info_trace(void **p, void *end, - struct ceph_mds_reply_info_parsed *info) + struct ceph_mds_reply_info_parsed *info, + int features) { int err; if (info->head->is_dentry) { - err = parse_reply_info_in(p, end, &info->diri); + err = parse_reply_info_in(p, end, &info->diri, features); if (err < 0) goto out_bad; @@ -115,7 +122,7 @@ static int parse_reply_info_trace(void **p, void *end, } if (info->head->is_target) { - err = parse_reply_info_in(p, end, &info->targeti); + err = parse_reply_info_in(p, end, &info->targeti, features); if (err < 0) goto out_bad; } @@ -135,7 +142,8 @@ out_bad: * parse readdir results */ static int parse_reply_info_dir(void **p, void *end, - struct ceph_mds_reply_info_parsed *info) + struct ceph_mds_reply_info_parsed *info, + int features) { u32 num, i = 0; int err; @@ -183,7 +191,7 @@ static int parse_reply_info_dir(void **p, void *end, *p += sizeof(struct ceph_mds_reply_lease); /* inode */ - err = parse_reply_info_in(p, end, &info->dir_in[i]); + err = parse_reply_info_in(p, end, &info->dir_in[i], features); if (err < 0) goto out_bad; i++; @@ -203,10 +211,45 @@ out_bad: } /* + * parse fcntl F_GETLK results + */ +static int parse_reply_info_filelock(void **p, void *end, + struct ceph_mds_reply_info_parsed *info, + int features) +{ + if (*p + sizeof(*info->filelock_reply) > end) + goto bad; + + info->filelock_reply = *p; + *p += sizeof(*info->filelock_reply); + + if (unlikely(*p != end)) + goto bad; + return 0; + +bad: + return -EIO; +} + +/* + * parse extra results + */ +static int parse_reply_info_extra(void **p, void *end, + struct ceph_mds_reply_info_parsed *info, + int features) +{ + if (info->head->op == CEPH_MDS_OP_GETFILELOCK) + return parse_reply_info_filelock(p, end, info, features); + else + return parse_reply_info_dir(p, end, info, features); +} + +/* * parse entire mds reply */ static int parse_reply_info(struct ceph_msg *msg, - struct ceph_mds_reply_info_parsed *info) + struct ceph_mds_reply_info_parsed *info, + int features) { void *p, *end; u32 len; @@ -219,15 +262,15 @@ static int parse_reply_info(struct ceph_msg *msg, /* trace */ ceph_decode_32_safe(&p, end, len, bad); if (len > 0) { - err = parse_reply_info_trace(&p, p+len, info); + err = parse_reply_info_trace(&p, p+len, info, features); if (err < 0) goto out_bad; } - /* dir content */ + /* extra */ ceph_decode_32_safe(&p, end, len, bad); if (len > 0) { - err = parse_reply_info_dir(&p, p+len, info); + err = parse_reply_info_extra(&p, p+len, info, features); if (err < 0) goto out_bad; } @@ -529,6 +572,9 @@ static void __register_request(struct ceph_mds_client *mdsc, ceph_mdsc_get_request(req); __insert_request(mdsc, req); + req->r_uid = current_fsuid(); + req->r_gid = current_fsgid(); + if (dir) { struct ceph_inode_info *ci = ceph_inode(dir); @@ -620,7 +666,7 @@ static int __choose_mds(struct ceph_mds_client *mdsc, } else { /* dir + name */ inode = dir; - hash = req->r_dentry->d_name.hash; + hash = ceph_dentry_hash(req->r_dentry); is_hash = true; } } @@ -1452,7 +1498,7 @@ retry: *base = ceph_ino(temp->d_inode); *plen = len; dout("build_path on %p %d built %llx '%.*s'\n", - dentry, atomic_read(&dentry->d_count), *base, len, path); + dentry, dentry->d_count, *base, len, path); return path; } @@ -1588,8 +1634,8 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc, head->mdsmap_epoch = cpu_to_le32(mdsc->mdsmap->m_epoch); head->op = cpu_to_le32(req->r_op); - head->caller_uid = cpu_to_le32(current_fsuid()); - head->caller_gid = cpu_to_le32(current_fsgid()); + head->caller_uid = cpu_to_le32(req->r_uid); + head->caller_gid = cpu_to_le32(req->r_gid); head->args = req->r_args; ceph_encode_filepath(&p, end, ino1, path1); @@ -1659,7 +1705,6 @@ static int __prepare_send_request(struct ceph_mds_client *mdsc, struct ceph_msg *msg; int flags = 0; - req->r_mds = mds; req->r_attempts++; if (req->r_inode) { struct ceph_cap *cap = @@ -1746,6 +1791,8 @@ static int __do_request(struct ceph_mds_client *mdsc, goto finish; } + put_request_session(req); + mds = __choose_mds(mdsc, req); if (mds < 0 || ceph_mdsmap_get_state(mdsc->mdsmap, mds) < CEPH_MDS_STATE_ACTIVE) { @@ -1763,6 +1810,8 @@ static int __do_request(struct ceph_mds_client *mdsc, goto finish; } } + req->r_session = get_session(session); + dout("do_request mds%d session %p state %s\n", mds, session, session_state_name(session->s_state)); if (session->s_state != CEPH_MDS_SESSION_OPEN && @@ -1775,7 +1824,6 @@ static int __do_request(struct ceph_mds_client *mdsc, } /* send request */ - req->r_session = get_session(session); req->r_resend_mds = -1; /* forget any previous mds hint */ if (req->r_request_started == 0) /* note request start time */ @@ -1829,7 +1877,6 @@ static void kick_requests(struct ceph_mds_client *mdsc, int mds) if (req->r_session && req->r_session->s_mds == mds) { dout(" kicking tid %llu\n", req->r_tid); - put_request_session(req); __do_request(mdsc, req); } } @@ -2022,8 +2069,11 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) goto out; } else { struct ceph_inode_info *ci = ceph_inode(req->r_inode); - struct ceph_cap *cap = - ceph_get_cap_for_mds(ci, req->r_mds);; + struct ceph_cap *cap = NULL; + + if (req->r_session) + cap = ceph_get_cap_for_mds(ci, + req->r_session->s_mds); dout("already using auth"); if ((!cap || cap != ci->i_auth_cap) || @@ -2067,12 +2117,12 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) dout("handle_reply tid %lld result %d\n", tid, result); rinfo = &req->r_reply_info; - err = parse_reply_info(msg, rinfo); + err = parse_reply_info(msg, rinfo, session->s_con.peer_features); mutex_unlock(&mdsc->mutex); mutex_lock(&session->s_mutex); if (err < 0) { - pr_err("mdsc_handle_reply got corrupt reply mds%d\n", mds); + pr_err("mdsc_handle_reply got corrupt reply mds%d(tid:%lld)\n", mds, tid); ceph_msg_dump(msg); goto out_err; } @@ -2092,7 +2142,8 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) mutex_lock(&req->r_fill_mutex); err = ceph_fill_trace(mdsc->fsc->sb, req, req->r_session); if (err == 0) { - if (result == 0 && rinfo->dir_nr) + if (result == 0 && req->r_op != CEPH_MDS_OP_GETFILELOCK && + rinfo->dir_nr) ceph_readdir_prepopulate(req, req->r_session); ceph_unreserve_caps(mdsc, &req->r_caps_reservation); } diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index d66d63c..4e3a9cc 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -35,6 +35,7 @@ struct ceph_cap; */ struct ceph_mds_reply_info_in { struct ceph_mds_reply_inode *in; + struct ceph_dir_layout dir_layout; u32 symlink_len; char *symlink; u32 xattr_len; @@ -42,26 +43,37 @@ struct ceph_mds_reply_info_in { }; /* - * parsed info about an mds reply, including information about the - * target inode and/or its parent directory and dentry, and directory - * contents (for readdir results). + * parsed info about an mds reply, including information about + * either: 1) the target inode and/or its parent directory and dentry, + * and directory contents (for readdir results), or + * 2) the file range lock info (for fcntl F_GETLK results). */ struct ceph_mds_reply_info_parsed { struct ceph_mds_reply_head *head; + /* trace */ struct ceph_mds_reply_info_in diri, targeti; struct ceph_mds_reply_dirfrag *dirfrag; char *dname; u32 dname_len; struct ceph_mds_reply_lease *dlease; - struct ceph_mds_reply_dirfrag *dir_dir; - int dir_nr; - char **dir_dname; - u32 *dir_dname_len; - struct ceph_mds_reply_lease **dir_dlease; - struct ceph_mds_reply_info_in *dir_in; - u8 dir_complete, dir_end; + /* extra */ + union { + /* for fcntl F_GETLK results */ + struct ceph_filelock *filelock_reply; + + /* for readdir results */ + struct { + struct ceph_mds_reply_dirfrag *dir_dir; + int dir_nr; + char **dir_dname; + u32 *dir_dname_len; + struct ceph_mds_reply_lease **dir_dlease; + struct ceph_mds_reply_info_in *dir_in; + u8 dir_complete, dir_end; + }; + }; /* encoded blob describing snapshot contexts for certain operations (e.g., open) */ @@ -154,7 +166,6 @@ struct ceph_mds_request { struct ceph_mds_client *r_mdsc; int r_op; /* mds op code */ - int r_mds; /* operation on what? */ struct inode *r_inode; /* arg1 */ @@ -170,6 +181,8 @@ struct ceph_mds_request { union ceph_mds_request_args r_args; int r_fmode; /* file mode, if expecting cap */ + uid_t r_uid; + gid_t r_gid; /* for choosing which mds to send this request to */ int r_direct_mode; diff --git a/fs/ceph/super.c b/fs/ceph/super.c index d6e0e04..bf6f0f3 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -428,7 +428,8 @@ struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, goto fail; } fsc->client->extra_mon_dispatch = extra_mon_dispatch; - fsc->client->supported_features |= CEPH_FEATURE_FLOCK; + fsc->client->supported_features |= CEPH_FEATURE_FLOCK | + CEPH_FEATURE_DIRLAYOUTHASH; fsc->client->monc.want_mdsmap = 1; fsc->mount_options = fsopt; @@ -443,13 +444,17 @@ struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt, goto fail_client; err = -ENOMEM; - fsc->wb_wq = create_workqueue("ceph-writeback"); + /* + * The number of concurrent works can be high but they don't need + * to be processed in parallel, limit concurrency. + */ + fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1); if (fsc->wb_wq == NULL) goto fail_bdi; - fsc->pg_inv_wq = create_singlethread_workqueue("ceph-pg-invalid"); + fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1); if (fsc->pg_inv_wq == NULL) goto fail_wb_wq; - fsc->trunc_wq = create_singlethread_workqueue("ceph-trunc"); + fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1); if (fsc->trunc_wq == NULL) goto fail_pg_inv_wq; @@ -635,7 +640,7 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, /* * mount: join the ceph cluster, and open root directory. */ -static int ceph_mount(struct ceph_fs_client *fsc, struct vfsmount *mnt, +static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc, const char *path) { int err; @@ -678,16 +683,14 @@ static int ceph_mount(struct ceph_fs_client *fsc, struct vfsmount *mnt, } } - mnt->mnt_root = root; - mnt->mnt_sb = fsc->sb; - fsc->mount_state = CEPH_MOUNT_MOUNTED; dout("mount success\n"); - err = 0; + mutex_unlock(&fsc->client->mount_mutex); + return root; out: mutex_unlock(&fsc->client->mount_mutex); - return err; + return ERR_PTR(err); fail: if (first) { @@ -777,41 +780,45 @@ static int ceph_register_bdi(struct super_block *sb, return err; } -static int ceph_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *ceph_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { struct super_block *sb; struct ceph_fs_client *fsc; + struct dentry *res; int err; int (*compare_super)(struct super_block *, void *) = ceph_compare_super; const char *path = NULL; struct ceph_mount_options *fsopt = NULL; struct ceph_options *opt = NULL; - dout("ceph_get_sb\n"); + dout("ceph_mount\n"); err = parse_mount_options(&fsopt, &opt, flags, data, dev_name, &path); - if (err < 0) + if (err < 0) { + res = ERR_PTR(err); goto out_final; + } /* create client (which we may/may not use) */ fsc = create_fs_client(fsopt, opt); if (IS_ERR(fsc)) { - err = PTR_ERR(fsc); + res = ERR_CAST(fsc); kfree(fsopt); kfree(opt); goto out_final; } err = ceph_mdsc_init(fsc); - if (err < 0) + if (err < 0) { + res = ERR_PTR(err); goto out; + } if (ceph_test_opt(fsc->client, NOSHARE)) compare_super = NULL; sb = sget(fs_type, compare_super, ceph_set_super, fsc); if (IS_ERR(sb)) { - err = PTR_ERR(sb); + res = ERR_CAST(sb); goto out; } @@ -823,16 +830,18 @@ static int ceph_get_sb(struct file_system_type *fs_type, } else { dout("get_sb using new client %p\n", fsc); err = ceph_register_bdi(sb, fsc); - if (err < 0) + if (err < 0) { + res = ERR_PTR(err); goto out_splat; + } } - err = ceph_mount(fsc, mnt, path); - if (err < 0) + res = ceph_real_mount(fsc, path); + if (IS_ERR(res)) goto out_splat; - dout("root %p inode %p ino %llx.%llx\n", mnt->mnt_root, - mnt->mnt_root->d_inode, ceph_vinop(mnt->mnt_root->d_inode)); - return 0; + dout("root %p inode %p ino %llx.%llx\n", res, + res->d_inode, ceph_vinop(res->d_inode)); + return res; out_splat: ceph_mdsc_close_sessions(fsc->mdsc); @@ -843,8 +852,8 @@ out: ceph_mdsc_destroy(fsc); destroy_fs_client(fsc); out_final: - dout("ceph_get_sb fail %d\n", err); - return err; + dout("ceph_mount fail %ld\n", PTR_ERR(res)); + return res; } static void ceph_kill_sb(struct super_block *s) @@ -860,7 +869,7 @@ static void ceph_kill_sb(struct super_block *s) static struct file_system_type ceph_fs_type = { .owner = THIS_MODULE, .name = "ceph", - .get_sb = ceph_get_sb, + .mount = ceph_mount, .kill_sb = ceph_kill_sb, .fs_flags = FS_RENAME_DOES_D_MOVE, }; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 1886294..20b907d 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -239,6 +239,7 @@ struct ceph_inode_info { unsigned i_ceph_flags; unsigned long i_release_count; + struct ceph_dir_layout i_dir_layout; struct ceph_file_layout i_layout; char *i_symlink; @@ -293,9 +294,7 @@ struct ceph_inode_info { int i_rd_ref, i_rdcache_ref, i_wr_ref; int i_wrbuffer_ref, i_wrbuffer_ref_head; u32 i_shared_gen; /* increment each time we get FILE_SHARED */ - u32 i_rdcache_gen; /* we increment this each time we get - FILE_CACHE. If it's non-zero, we - _may_ have cached pages. */ + u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ struct list_head i_unsafe_writes; /* uncommitted sync writes */ @@ -667,7 +666,7 @@ extern void ceph_queue_invalidate(struct inode *inode); extern void ceph_queue_writeback(struct inode *inode); extern int ceph_do_getattr(struct inode *inode, int mask); -extern int ceph_permission(struct inode *inode, int mask); +extern int ceph_permission(struct inode *inode, int mask, unsigned int flags); extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); @@ -770,6 +769,7 @@ extern void ceph_dentry_lru_add(struct dentry *dn); extern void ceph_dentry_lru_touch(struct dentry *dn); extern void ceph_dentry_lru_del(struct dentry *dn); extern void ceph_invalidate_dentry_lease(struct dentry *dentry); +extern unsigned ceph_dentry_hash(struct dentry *dn); /* * our d_ops vary depending on whether the inode is live, diff --git a/fs/char_dev.c b/fs/char_dev.c index e5b9df9..6e99b9d 100644 --- a/fs/char_dev.c +++ b/fs/char_dev.c @@ -417,18 +417,6 @@ static int chrdev_open(struct inode *inode, struct file *filp) return ret; } -int cdev_index(struct inode *inode) -{ - int idx; - struct kobject *kobj; - - kobj = kobj_lookup(cdev_map, inode->i_rdev, &idx); - if (!kobj) - return -1; - kobject_put(kobj); - return idx; -} - void cd_forget(struct inode *inode) { spin_lock(&cdev_lock); @@ -582,7 +570,6 @@ EXPORT_SYMBOL(cdev_init); EXPORT_SYMBOL(cdev_alloc); EXPORT_SYMBOL(cdev_del); EXPORT_SYMBOL(cdev_add); -EXPORT_SYMBOL(cdev_index); EXPORT_SYMBOL(__register_chrdev); EXPORT_SYMBOL(__unregister_chrdev); EXPORT_SYMBOL(directly_mappable_cdev_bdi); diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig index 917b7d4..ee45648 100644 --- a/fs/cifs/Kconfig +++ b/fs/cifs/Kconfig @@ -2,6 +2,10 @@ config CIFS tristate "CIFS support (advanced network filesystem, SMBFS successor)" depends on INET select NLS + select CRYPTO + select CRYPTO_MD5 + select CRYPTO_HMAC + select CRYPTO_ARC4 help This is the client VFS module for the Common Internet File System (CIFS) protocol which is the successor to the Server Message Block @@ -140,6 +144,13 @@ config CIFS_FSCACHE to be cached locally on disk through the general filesystem cache manager. If unsure, say N. +config CIFS_ACL + bool "Provide CIFS ACL support (EXPERIMENTAL)" + depends on EXPERIMENTAL && CIFS_XATTR + help + Allows to fetch CIFS/NTFS ACL from the server. The DACL blob + is handed over to the application/caller. + config CIFS_EXPERIMENTAL bool "CIFS Experimental Features (EXPERIMENTAL)" depends on CIFS && EXPERIMENTAL diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile index adefa60..43b19dd 100644 --- a/fs/cifs/Makefile +++ b/fs/cifs/Makefile @@ -6,7 +6,9 @@ obj-$(CONFIG_CIFS) += cifs.o cifs-y := cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o inode.o \ link.o misc.o netmisc.o smbdes.o smbencrypt.o transport.o asn1.o \ md4.o md5.o cifs_unicode.o nterr.o xattr.o cifsencrypt.o \ - readdir.o ioctl.o sess.o export.o cifsacl.o + readdir.o ioctl.o sess.o export.o + +cifs-$(CONFIG_CIFS_ACL) += cifsacl.o cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o diff --git a/fs/cifs/README b/fs/cifs/README index ee68d10..46af99a 100644 --- a/fs/cifs/README +++ b/fs/cifs/README @@ -337,6 +337,15 @@ A partial list of the supported mount options follows: wsize default write size (default 57344) maximum wsize currently allowed by CIFS is 57344 (fourteen 4096 byte pages) + actimeo=n attribute cache timeout in seconds (default 1 second). + After this timeout, the cifs client requests fresh attribute + information from the server. This option allows to tune the + attribute cache timeout to suit the workload needs. Shorter + timeouts mean better the cache coherency, but increased number + of calls to the server. Longer timeouts mean reduced number + of calls to the server at the expense of less stricter cache + coherency checks (i.e. incorrect attribute cache for a short + period of time). rw mount the network share read-write (note that the server may still consider the share read-only) ro mount network share read-only diff --git a/fs/cifs/TODO b/fs/cifs/TODO index 5aff46c..355abcdc 100644 --- a/fs/cifs/TODO +++ b/fs/cifs/TODO @@ -81,7 +81,7 @@ u) DOS attrs - returned as pseudo-xattr in Samba format (check VFAT and NTFS for v) mount check for unmatched uids -w) Add support for new vfs entry points for setlease and fallocate +w) Add support for new vfs entry point for fallocate x) Fix Samba 3 server to handle Linux kernel aio so dbench with lots of processes can proceed better in parallel (on the server) diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c index 224d7bbd..e654dfd 100644 --- a/fs/cifs/cache.c +++ b/fs/cifs/cache.c @@ -64,7 +64,9 @@ static uint16_t cifs_server_get_key(const void *cookie_netfs_data, void *buffer, uint16_t maxbuf) { const struct TCP_Server_Info *server = cookie_netfs_data; - const struct sockaddr *sa = (struct sockaddr *) &server->addr.sockAddr; + const struct sockaddr *sa = (struct sockaddr *) &server->dstaddr; + const struct sockaddr_in *addr = (struct sockaddr_in *) sa; + const struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) sa; struct cifs_server_key *key = buffer; uint16_t key_len = sizeof(struct cifs_server_key); @@ -76,16 +78,16 @@ static uint16_t cifs_server_get_key(const void *cookie_netfs_data, */ switch (sa->sa_family) { case AF_INET: - key->family = server->addr.sockAddr.sin_family; - key->port = server->addr.sockAddr.sin_port; - key->addr[0].ipv4_addr = server->addr.sockAddr.sin_addr; + key->family = sa->sa_family; + key->port = addr->sin_port; + key->addr[0].ipv4_addr = addr->sin_addr; key_len += sizeof(key->addr[0].ipv4_addr); break; case AF_INET6: - key->family = server->addr.sockAddr6.sin6_family; - key->port = server->addr.sockAddr6.sin6_port; - key->addr[0].ipv6_addr = server->addr.sockAddr6.sin6_addr; + key->family = sa->sa_family; + key->port = addr6->sin6_port; + key->addr[0].ipv6_addr = addr6->sin6_addr; key_len += sizeof(key->addr[0].ipv6_addr); break; diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c index 103ab8b..ede9830 100644 --- a/fs/cifs/cifs_debug.c +++ b/fs/cifs/cifs_debug.c @@ -119,29 +119,27 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v) "Display Internal CIFS Data Structures for Debugging\n" "---------------------------------------------------\n"); seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); - seq_printf(m, "Features: "); + seq_printf(m, "Features:"); #ifdef CONFIG_CIFS_DFS_UPCALL - seq_printf(m, "dfs"); - seq_putc(m, ' '); + seq_printf(m, " dfs"); #endif #ifdef CONFIG_CIFS_FSCACHE - seq_printf(m, "fscache"); - seq_putc(m, ' '); + seq_printf(m, " fscache"); #endif #ifdef CONFIG_CIFS_WEAK_PW_HASH - seq_printf(m, "lanman"); - seq_putc(m, ' '); + seq_printf(m, " lanman"); #endif #ifdef CONFIG_CIFS_POSIX - seq_printf(m, "posix"); - seq_putc(m, ' '); + seq_printf(m, " posix"); #endif #ifdef CONFIG_CIFS_UPCALL - seq_printf(m, "spnego"); - seq_putc(m, ' '); + seq_printf(m, " spnego"); #endif #ifdef CONFIG_CIFS_XATTR - seq_printf(m, "xattr"); + seq_printf(m, " xattr"); +#endif +#ifdef CONFIG_CIFS_ACL + seq_printf(m, " acl"); #endif seq_putc(m, '\n'); seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h index 525ba59..7852cd6 100644 --- a/fs/cifs/cifs_fs_sb.h +++ b/fs/cifs/cifs_fs_sb.h @@ -15,7 +15,7 @@ * the GNU Lesser General Public License for more details. * */ -#include <linux/radix-tree.h> +#include <linux/rbtree.h> #ifndef _CIFS_FS_SB_H #define _CIFS_FS_SB_H @@ -42,12 +42,13 @@ #define CIFS_MOUNT_MULTIUSER 0x20000 /* multiuser mount */ struct cifs_sb_info { - struct radix_tree_root tlink_tree; -#define CIFS_TLINK_MASTER_TAG 0 /* is "master" (mount) tcon */ + struct rb_root tlink_tree; spinlock_t tlink_tree_lock; + struct tcon_link *master_tlink; struct nls_table *local_nls; unsigned int rsize; unsigned int wsize; + unsigned long actimeo; /* attribute cache timeout (jiffies) */ atomic_t active; uid_t mnt_uid; gid_t mnt_gid; diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c index 8704490..4dfba82 100644 --- a/fs/cifs/cifs_spnego.c +++ b/fs/cifs/cifs_spnego.c @@ -98,6 +98,8 @@ struct key * cifs_get_spnego_key(struct cifsSesInfo *sesInfo) { struct TCP_Server_Info *server = sesInfo->server; + struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; + struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; char *description, *dp; size_t desc_len; struct key *spnego_key; @@ -127,10 +129,10 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo) dp = description + strlen(description); /* add the server address */ - if (server->addr.sockAddr.sin_family == AF_INET) - sprintf(dp, "ip4=%pI4", &server->addr.sockAddr.sin_addr); - else if (server->addr.sockAddr.sin_family == AF_INET6) - sprintf(dp, "ip6=%pI6", &server->addr.sockAddr6.sin6_addr); + if (server->dstaddr.ss_family == AF_INET) + sprintf(dp, "ip4=%pI4", &sa->sin_addr); + else if (server->dstaddr.ss_family == AF_INET6) + sprintf(dp, "ip6=%pI6", &sa6->sin6_addr); else goto out; diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index c9b4792..a437ec3 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -30,8 +30,6 @@ #include "cifs_debug.h" -#ifdef CONFIG_CIFS_EXPERIMENTAL - static struct cifs_wksid wksidarr[NUM_WK_SIDS] = { {{1, 0, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0} }, "null user"}, {{1, 1, {0, 0, 0, 0, 0, 1}, {0, 0, 0, 0, 0} }, "nobody"}, @@ -560,7 +558,7 @@ static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) - return NULL; + return ERR_CAST(tlink); xid = GetXid(); rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), fid, &pntsd, pacllen); @@ -568,7 +566,9 @@ static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, cifs_put_tlink(tlink); - cFYI(1, "GetCIFSACL rc = %d ACL len %d", rc, *pacllen); + cFYI(1, "%s: rc = %d ACL len %d", __func__, rc, *pacllen); + if (rc) + return ERR_PTR(rc); return pntsd; } @@ -583,7 +583,7 @@ static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) - return NULL; + return ERR_CAST(tlink); tcon = tlink_tcon(tlink); xid = GetXid(); @@ -591,23 +591,22 @@ static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, READ_CONTROL, 0, &fid, &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); - if (rc) { - cERROR(1, "Unable to open file to get ACL"); - goto out; + if (!rc) { + rc = CIFSSMBGetCIFSACL(xid, tcon, fid, &pntsd, pacllen); + CIFSSMBClose(xid, tcon, fid); } - rc = CIFSSMBGetCIFSACL(xid, tcon, fid, &pntsd, pacllen); - cFYI(1, "GetCIFSACL rc = %d ACL len %d", rc, *pacllen); - - CIFSSMBClose(xid, tcon, fid); - out: cifs_put_tlink(tlink); FreeXid(xid); + + cFYI(1, "%s: rc = %d ACL len %d", __func__, rc, *pacllen); + if (rc) + return ERR_PTR(rc); return pntsd; } /* Retrieve an ACL from the server */ -static struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb, +struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb, struct inode *inode, const char *path, u32 *pacllen) { @@ -695,7 +694,7 @@ static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen, } /* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */ -void +int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct inode *inode, const char *path, const __u16 *pfid) { @@ -711,17 +710,21 @@ cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, pntsd = get_cifs_acl(cifs_sb, inode, path, &acllen); /* if we can retrieve the ACL, now parse Access Control Entries, ACEs */ - if (pntsd) + if (IS_ERR(pntsd)) { + rc = PTR_ERR(pntsd); + cERROR(1, "%s: error %d getting sec desc", __func__, rc); + } else { rc = parse_sec_desc(pntsd, acllen, fattr); - if (rc) - cFYI(1, "parse sec desc failed rc = %d", rc); + kfree(pntsd); + if (rc) + cERROR(1, "parse sec desc failed rc = %d", rc); + } - kfree(pntsd); - return; + return rc; } /* Convert mode bits to an ACL so we can update the ACL on the server */ -int mode_to_acl(struct inode *inode, const char *path, __u64 nmode) +int mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode) { int rc = 0; __u32 secdesclen = 0; @@ -736,7 +739,10 @@ int mode_to_acl(struct inode *inode, const char *path, __u64 nmode) /* Add three ACEs for owner, group, everyone getting rid of other ACEs as chmod disables ACEs and set the security descriptor */ - if (pntsd) { + if (IS_ERR(pntsd)) { + rc = PTR_ERR(pntsd); + cERROR(1, "%s: error %d getting sec desc", __func__, rc); + } else { /* allocate memory for the smb header, set security descriptor request security descriptor parameters, and secuirty descriptor itself */ @@ -766,4 +772,3 @@ int mode_to_acl(struct inode *inode, const char *path, __u64 nmode) return rc; } -#endif /* CONFIG_CIFS_EXPERIMENTAL */ diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h index 6c8096c..c4ae7d0 100644 --- a/fs/cifs/cifsacl.h +++ b/fs/cifs/cifsacl.h @@ -74,11 +74,7 @@ struct cifs_wksid { char sidname[SIDNAMELENGTH]; } __attribute__((packed)); -#ifdef CONFIG_CIFS_EXPERIMENTAL - extern int match_sid(struct cifs_sid *); extern int compare_sids(const struct cifs_sid *, const struct cifs_sid *); -#endif /* CONFIG_CIFS_EXPERIMENTAL */ - #endif /* _CIFSACL_H */ diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index 7ac0056..66f3d50 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -43,21 +43,36 @@ extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24); static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu, - const struct session_key *key, char *signature) + struct TCP_Server_Info *server, char *signature) { - struct MD5Context context; + int rc; - if ((cifs_pdu == NULL) || (signature == NULL) || (key == NULL)) + if (cifs_pdu == NULL || signature == NULL || server == NULL) return -EINVAL; - cifs_MD5_init(&context); - cifs_MD5_update(&context, (char *)&key->data, key->len); - cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length); + if (!server->secmech.sdescmd5) { + cERROR(1, "%s: Can't generate signature\n", __func__); + return -1; + } + + rc = crypto_shash_init(&server->secmech.sdescmd5->shash); + if (rc) { + cERROR(1, "%s: Oould not init md5\n", __func__); + return rc; + } + + crypto_shash_update(&server->secmech.sdescmd5->shash, + server->session_key.response, server->session_key.len); + + crypto_shash_update(&server->secmech.sdescmd5->shash, + cifs_pdu->Protocol, cifs_pdu->smb_buf_length); + + rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature); - cifs_MD5_final(signature, &context); return 0; } +/* must be called with server->srv_mutex held */ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server, __u32 *pexpected_response_sequence_number) { @@ -70,17 +85,14 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server, if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) return rc; - spin_lock(&GlobalMid_Lock); cifs_pdu->Signature.Sequence.SequenceNumber = cpu_to_le32(server->sequence_number); cifs_pdu->Signature.Sequence.Reserved = 0; *pexpected_response_sequence_number = server->sequence_number++; server->sequence_number++; - spin_unlock(&GlobalMid_Lock); - rc = cifs_calculate_signature(cifs_pdu, &server->session_key, - smb_signature); + rc = cifs_calculate_signature(cifs_pdu, server, smb_signature); if (rc) memset(cifs_pdu->Signature.SecuritySignature, 0, 8); else @@ -90,16 +102,28 @@ int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server, } static int cifs_calc_signature2(const struct kvec *iov, int n_vec, - const struct session_key *key, char *signature) + struct TCP_Server_Info *server, char *signature) { - struct MD5Context context; int i; + int rc; - if ((iov == NULL) || (signature == NULL) || (key == NULL)) + if (iov == NULL || signature == NULL || server == NULL) return -EINVAL; - cifs_MD5_init(&context); - cifs_MD5_update(&context, (char *)&key->data, key->len); + if (!server->secmech.sdescmd5) { + cERROR(1, "%s: Can't generate signature\n", __func__); + return -1; + } + + rc = crypto_shash_init(&server->secmech.sdescmd5->shash); + if (rc) { + cERROR(1, "%s: Oould not init md5\n", __func__); + return rc; + } + + crypto_shash_update(&server->secmech.sdescmd5->shash, + server->session_key.response, server->session_key.len); + for (i = 0; i < n_vec; i++) { if (iov[i].iov_len == 0) continue; @@ -112,18 +136,19 @@ static int cifs_calc_signature2(const struct kvec *iov, int n_vec, if (i == 0) { if (iov[0].iov_len <= 8) /* cmd field at offset 9 */ break; /* nothing to sign or corrupt header */ - cifs_MD5_update(&context, iov[0].iov_base+4, - iov[0].iov_len-4); + crypto_shash_update(&server->secmech.sdescmd5->shash, + iov[i].iov_base + 4, iov[i].iov_len - 4); } else - cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len); + crypto_shash_update(&server->secmech.sdescmd5->shash, + iov[i].iov_base, iov[i].iov_len); } - cifs_MD5_final(signature, &context); + rc = crypto_shash_final(&server->secmech.sdescmd5->shash, signature); - return 0; + return rc; } - +/* must be called with server->srv_mutex held */ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, __u32 *pexpected_response_sequence_number) { @@ -137,17 +162,14 @@ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) return rc; - spin_lock(&GlobalMid_Lock); cifs_pdu->Signature.Sequence.SequenceNumber = cpu_to_le32(server->sequence_number); cifs_pdu->Signature.Sequence.Reserved = 0; *pexpected_response_sequence_number = server->sequence_number++; server->sequence_number++; - spin_unlock(&GlobalMid_Lock); - rc = cifs_calc_signature2(iov, n_vec, &server->session_key, - smb_signature); + rc = cifs_calc_signature2(iov, n_vec, server, smb_signature); if (rc) memset(cifs_pdu->Signature.SecuritySignature, 0, 8); else @@ -157,14 +179,14 @@ int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, } int cifs_verify_signature(struct smb_hdr *cifs_pdu, - const struct session_key *session_key, + struct TCP_Server_Info *server, __u32 expected_sequence_number) { unsigned int rc; char server_response_sig[8]; char what_we_think_sig_should_be[20]; - if (cifs_pdu == NULL || session_key == NULL) + if (cifs_pdu == NULL || server == NULL) return -EINVAL; if (cifs_pdu->Command == SMB_COM_NEGOTIATE) @@ -193,7 +215,7 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu, cpu_to_le32(expected_sequence_number); cifs_pdu->Signature.Sequence.Reserved = 0; - rc = cifs_calculate_signature(cifs_pdu, session_key, + rc = cifs_calculate_signature(cifs_pdu, server, what_we_think_sig_should_be); if (rc) @@ -209,18 +231,28 @@ int cifs_verify_signature(struct smb_hdr *cifs_pdu, } -/* We fill in key by putting in 40 byte array which was allocated by caller */ -int cifs_calculate_session_key(struct session_key *key, const char *rn, - const char *password) +/* first calculate 24 bytes ntlm response and then 16 byte session key */ +int setup_ntlm_response(struct cifsSesInfo *ses) { - char temp_key[16]; - if ((key == NULL) || (rn == NULL)) + unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE; + char temp_key[CIFS_SESS_KEY_SIZE]; + + if (!ses) return -EINVAL; - E_md4hash(password, temp_key); - mdfour(key->data.ntlm, temp_key, 16); - memcpy(key->data.ntlm+16, rn, CIFS_SESS_KEY_SIZE); - key->len = 40; + ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL); + if (!ses->auth_key.response) { + cERROR(1, "NTLM can't allocate (%u bytes) memory", temp_len); + return -ENOMEM; + } + ses->auth_key.len = temp_len; + + SMBNTencrypt(ses->password, ses->server->cryptkey, + ses->auth_key.response + CIFS_SESS_KEY_SIZE); + + E_md4hash(ses->password, temp_key); + mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE); + return 0; } @@ -294,15 +326,15 @@ build_avpair_blob(struct cifsSesInfo *ses, const struct nls_table *nls_cp) * two times the unicode length of a server name + * size of a timestamp (which is 8 bytes). */ - ses->tilen = size + 2 * (2 * dlen) + 2 * (2 * wlen) + 8; - ses->tiblob = kzalloc(ses->tilen, GFP_KERNEL); - if (!ses->tiblob) { - ses->tilen = 0; + ses->auth_key.len = size + 2 * (2 * dlen) + 2 * (2 * wlen) + 8; + ses->auth_key.response = kzalloc(ses->auth_key.len, GFP_KERNEL); + if (!ses->auth_key.response) { + ses->auth_key.len = 0; cERROR(1, "Challenge target info allocation failure"); return -ENOMEM; } - blobptr = ses->tiblob; + blobptr = ses->auth_key.response; attrptr = (struct ntlmssp2_name *) blobptr; attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME); @@ -357,7 +389,7 @@ build_avpair_blob(struct cifsSesInfo *ses, const struct nls_table *nls_cp) * about target string i.e. for some, just user name might suffice. */ static int -find_domain_name(struct cifsSesInfo *ses) +find_domain_name(struct cifsSesInfo *ses, const struct nls_table *nls_cp) { unsigned int attrsize; unsigned int type; @@ -366,11 +398,11 @@ find_domain_name(struct cifsSesInfo *ses) unsigned char *blobend; struct ntlmssp2_name *attrptr; - if (!ses->tilen || !ses->tiblob) + if (!ses->auth_key.len || !ses->auth_key.response) return 0; - blobptr = ses->tiblob; - blobend = ses->tiblob + ses->tilen; + blobptr = ses->auth_key.response; + blobend = blobptr + ses->auth_key.len; while (blobptr + onesize < blobend) { attrptr = (struct ntlmssp2_name *) blobptr; @@ -386,16 +418,13 @@ find_domain_name(struct cifsSesInfo *ses) if (!attrsize) break; if (!ses->domainName) { - struct nls_table *default_nls; ses->domainName = kmalloc(attrsize + 1, GFP_KERNEL); if (!ses->domainName) return -ENOMEM; - default_nls = load_nls_default(); cifs_from_ucs2(ses->domainName, (__le16 *)blobptr, attrsize, attrsize, - default_nls, false); - unload_nls(default_nls); + nls_cp, false); break; } } @@ -405,82 +434,136 @@ find_domain_name(struct cifsSesInfo *ses) return 0; } -static int calc_ntlmv2_hash(struct cifsSesInfo *ses, +static int calc_ntlmv2_hash(struct cifsSesInfo *ses, char *ntlmv2_hash, const struct nls_table *nls_cp) { int rc = 0; int len; - char nt_hash[16]; - struct HMACMD5Context *pctxt; + char nt_hash[CIFS_NTHASH_SIZE]; wchar_t *user; wchar_t *domain; + wchar_t *server; - pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL); - - if (pctxt == NULL) - return -ENOMEM; + if (!ses->server->secmech.sdeschmacmd5) { + cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n"); + return -1; + } /* calculate md4 hash of password */ E_md4hash(ses->password, nt_hash); - /* convert Domainname to unicode and uppercase */ - hmac_md5_init_limK_to_64(nt_hash, 16, pctxt); + crypto_shash_setkey(ses->server->secmech.hmacmd5, nt_hash, + CIFS_NTHASH_SIZE); + + rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash); + if (rc) { + cERROR(1, "calc_ntlmv2_hash: could not init hmacmd5\n"); + return rc; + } /* convert ses->userName to unicode and uppercase */ len = strlen(ses->userName); user = kmalloc(2 + (len * 2), GFP_KERNEL); - if (user == NULL) + if (user == NULL) { + cERROR(1, "calc_ntlmv2_hash: user mem alloc failure\n"); + rc = -ENOMEM; goto calc_exit_2; + } len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp); UniStrupr(user); - hmac_md5_update((char *)user, 2*len, pctxt); + + crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash, + (char *)user, 2 * len); /* convert ses->domainName to unicode and uppercase */ if (ses->domainName) { len = strlen(ses->domainName); domain = kmalloc(2 + (len * 2), GFP_KERNEL); - if (domain == NULL) + if (domain == NULL) { + cERROR(1, "calc_ntlmv2_hash: domain mem alloc failure"); + rc = -ENOMEM; goto calc_exit_1; + } len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len, nls_cp); - /* the following line was removed since it didn't work well - with lower cased domain name that passed as an option. - Maybe converting the domain name earlier makes sense */ - /* UniStrupr(domain); */ - - hmac_md5_update((char *)domain, 2*len, pctxt); - + crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash, + (char *)domain, 2 * len); kfree(domain); + } else if (ses->serverName) { + len = strlen(ses->serverName); + + server = kmalloc(2 + (len * 2), GFP_KERNEL); + if (server == NULL) { + cERROR(1, "calc_ntlmv2_hash: server mem alloc failure"); + rc = -ENOMEM; + goto calc_exit_1; + } + len = cifs_strtoUCS((__le16 *)server, ses->serverName, len, + nls_cp); + crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash, + (char *)server, 2 * len); + kfree(server); } + + rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash, + ntlmv2_hash); + calc_exit_1: kfree(user); calc_exit_2: - /* BB FIXME what about bytes 24 through 40 of the signing key? - compare with the NTLM example */ - hmac_md5_final(ses->ntlmv2_hash, pctxt); + return rc; +} + +static int +CalcNTLMv2_response(const struct cifsSesInfo *ses, char *ntlmv2_hash) +{ + int rc; + unsigned int offset = CIFS_SESS_KEY_SIZE + 8; + + if (!ses->server->secmech.sdeschmacmd5) { + cERROR(1, "calc_ntlmv2_hash: can't generate ntlmv2 hash\n"); + return -1; + } + + crypto_shash_setkey(ses->server->secmech.hmacmd5, + ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE); + + rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash); + if (rc) { + cERROR(1, "CalcNTLMv2_response: could not init hmacmd5"); + return rc; + } + + if (ses->server->secType == RawNTLMSSP) + memcpy(ses->auth_key.response + offset, + ses->ntlmssp->cryptkey, CIFS_SERVER_CHALLENGE_SIZE); + else + memcpy(ses->auth_key.response + offset, + ses->server->cryptkey, CIFS_SERVER_CHALLENGE_SIZE); + crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash, + ses->auth_key.response + offset, ses->auth_key.len - offset); + + rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash, + ses->auth_key.response + CIFS_SESS_KEY_SIZE); - kfree(pctxt); return rc; } + int -setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf, - const struct nls_table *nls_cp) +setup_ntlmv2_rsp(struct cifsSesInfo *ses, const struct nls_table *nls_cp) { int rc; - struct ntlmv2_resp *buf = (struct ntlmv2_resp *)resp_buf; - struct HMACMD5Context context; - - buf->blob_signature = cpu_to_le32(0x00000101); - buf->reserved = 0; - buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); - get_random_bytes(&buf->client_chal, sizeof(buf->client_chal)); - buf->reserved2 = 0; + int baselen; + unsigned int tilen; + struct ntlmv2_resp *buf; + char ntlmv2_hash[16]; + unsigned char *tiblob = NULL; /* target info blob */ if (ses->server->secType == RawNTLMSSP) { if (!ses->domainName) { - rc = find_domain_name(ses); + rc = find_domain_name(ses, nls_cp); if (rc) { cERROR(1, "error %d finding domain name", rc); goto setup_ntlmv2_rsp_ret; @@ -490,51 +573,179 @@ setup_ntlmv2_rsp(struct cifsSesInfo *ses, char *resp_buf, rc = build_avpair_blob(ses, nls_cp); if (rc) { cERROR(1, "error %d building av pair blob", rc); - return rc; + goto setup_ntlmv2_rsp_ret; } } - /* calculate buf->ntlmv2_hash */ - rc = calc_ntlmv2_hash(ses, nls_cp); + baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp); + tilen = ses->auth_key.len; + tiblob = ses->auth_key.response; + + ses->auth_key.response = kmalloc(baselen + tilen, GFP_KERNEL); + if (!ses->auth_key.response) { + rc = ENOMEM; + ses->auth_key.len = 0; + cERROR(1, "%s: Can't allocate auth blob", __func__); + goto setup_ntlmv2_rsp_ret; + } + ses->auth_key.len += baselen; + + buf = (struct ntlmv2_resp *) + (ses->auth_key.response + CIFS_SESS_KEY_SIZE); + buf->blob_signature = cpu_to_le32(0x00000101); + buf->reserved = 0; + buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); + get_random_bytes(&buf->client_chal, sizeof(buf->client_chal)); + buf->reserved2 = 0; + + memcpy(ses->auth_key.response + baselen, tiblob, tilen); + + /* calculate ntlmv2_hash */ + rc = calc_ntlmv2_hash(ses, ntlmv2_hash, nls_cp); if (rc) { cERROR(1, "could not get v2 hash rc %d", rc); goto setup_ntlmv2_rsp_ret; } - CalcNTLMv2_response(ses, resp_buf); + + /* calculate first part of the client response (CR1) */ + rc = CalcNTLMv2_response(ses, ntlmv2_hash); + if (rc) { + cERROR(1, "Could not calculate CR1 rc: %d", rc); + goto setup_ntlmv2_rsp_ret; + } /* now calculate the session key for NTLMv2 */ - hmac_md5_init_limK_to_64(ses->ntlmv2_hash, 16, &context); - hmac_md5_update(resp_buf, 16, &context); - hmac_md5_final(ses->auth_key.data.ntlmv2.key, &context); + crypto_shash_setkey(ses->server->secmech.hmacmd5, + ntlmv2_hash, CIFS_HMAC_MD5_HASH_SIZE); + + rc = crypto_shash_init(&ses->server->secmech.sdeschmacmd5->shash); + if (rc) { + cERROR(1, "%s: Could not init hmacmd5\n", __func__); + goto setup_ntlmv2_rsp_ret; + } - memcpy(&ses->auth_key.data.ntlmv2.resp, resp_buf, - sizeof(struct ntlmv2_resp)); - ses->auth_key.len = 16 + sizeof(struct ntlmv2_resp); + crypto_shash_update(&ses->server->secmech.sdeschmacmd5->shash, + ses->auth_key.response + CIFS_SESS_KEY_SIZE, + CIFS_HMAC_MD5_HASH_SIZE); - return 0; + rc = crypto_shash_final(&ses->server->secmech.sdeschmacmd5->shash, + ses->auth_key.response); setup_ntlmv2_rsp_ret: - kfree(ses->tiblob); - ses->tiblob = NULL; - ses->tilen = 0; + kfree(tiblob); return rc; } -void CalcNTLMv2_response(const struct cifsSesInfo *ses, - char *v2_session_response) +int +calc_seckey(struct cifsSesInfo *ses) { - struct HMACMD5Context context; - /* rest of v2 struct already generated */ - memcpy(v2_session_response + 8, ses->cryptKey, 8); - hmac_md5_init_limK_to_64(ses->ntlmv2_hash, 16, &context); + int rc; + struct crypto_blkcipher *tfm_arc4; + struct scatterlist sgin, sgout; + struct blkcipher_desc desc; + unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */ + + get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE); + + tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC); + if (!tfm_arc4 || IS_ERR(tfm_arc4)) { + cERROR(1, "could not allocate crypto API arc4\n"); + return PTR_ERR(tfm_arc4); + } - hmac_md5_update(v2_session_response+8, - sizeof(struct ntlmv2_resp) - 8, &context); + desc.tfm = tfm_arc4; - if (ses->tilen) - hmac_md5_update(ses->tiblob, ses->tilen, &context); + crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response, + CIFS_SESS_KEY_SIZE); - hmac_md5_final(v2_session_response, &context); -/* cifs_dump_mem("v2_sess_rsp: ", v2_session_response, 32); */ + sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE); + sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); + + rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE); + if (rc) { + cERROR(1, "could not encrypt session key rc: %d\n", rc); + crypto_free_blkcipher(tfm_arc4); + return rc; + } + + /* make secondary_key/nonce as session key */ + memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE); + /* and make len as that of session key only */ + ses->auth_key.len = CIFS_SESS_KEY_SIZE; + + crypto_free_blkcipher(tfm_arc4); + + return 0; +} + +void +cifs_crypto_shash_release(struct TCP_Server_Info *server) +{ + if (server->secmech.md5) + crypto_free_shash(server->secmech.md5); + + if (server->secmech.hmacmd5) + crypto_free_shash(server->secmech.hmacmd5); + + kfree(server->secmech.sdeschmacmd5); + + kfree(server->secmech.sdescmd5); +} + +int +cifs_crypto_shash_allocate(struct TCP_Server_Info *server) +{ + int rc; + unsigned int size; + + server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0); + if (!server->secmech.hmacmd5 || + IS_ERR(server->secmech.hmacmd5)) { + cERROR(1, "could not allocate crypto hmacmd5\n"); + return PTR_ERR(server->secmech.hmacmd5); + } + + server->secmech.md5 = crypto_alloc_shash("md5", 0, 0); + if (!server->secmech.md5 || IS_ERR(server->secmech.md5)) { + cERROR(1, "could not allocate crypto md5\n"); + rc = PTR_ERR(server->secmech.md5); + goto crypto_allocate_md5_fail; + } + + size = sizeof(struct shash_desc) + + crypto_shash_descsize(server->secmech.hmacmd5); + server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL); + if (!server->secmech.sdeschmacmd5) { + cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n"); + rc = -ENOMEM; + goto crypto_allocate_hmacmd5_sdesc_fail; + } + server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5; + server->secmech.sdeschmacmd5->shash.flags = 0x0; + + + size = sizeof(struct shash_desc) + + crypto_shash_descsize(server->secmech.md5); + server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL); + if (!server->secmech.sdescmd5) { + cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n"); + rc = -ENOMEM; + goto crypto_allocate_md5_sdesc_fail; + } + server->secmech.sdescmd5->shash.tfm = server->secmech.md5; + server->secmech.sdescmd5->shash.flags = 0x0; + + return 0; + +crypto_allocate_md5_sdesc_fail: + kfree(server->secmech.sdeschmacmd5); + +crypto_allocate_hmacmd5_sdesc_fail: + crypto_free_shash(server->secmech.md5); + +crypto_allocate_md5_fail: + crypto_free_shash(server->secmech.hmacmd5); + + return rc; } diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 3437163..5e7075d 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -116,7 +116,7 @@ cifs_read_super(struct super_block *sb, void *data, return -ENOMEM; spin_lock_init(&cifs_sb->tlink_tree_lock); - INIT_RADIX_TREE(&cifs_sb->tlink_tree, GFP_KERNEL); + cifs_sb->tlink_tree = RB_ROOT; rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); if (rc) { @@ -283,10 +283,13 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf) return 0; } -static int cifs_permission(struct inode *inode, int mask) +static int cifs_permission(struct inode *inode, int mask, unsigned int flags) { struct cifs_sb_info *cifs_sb; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + cifs_sb = CIFS_SB(inode->i_sb); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { @@ -298,7 +301,7 @@ static int cifs_permission(struct inode *inode, int mask) on the client (above and beyond ACL on servers) for servers which do not support setting and viewing mode bits, so allowing client to check permissions is useful */ - return generic_permission(inode, mask, NULL); + return generic_permission(inode, mask, flags, NULL); } static struct kmem_cache *cifs_inode_cachep; @@ -318,16 +321,16 @@ cifs_alloc_inode(struct super_block *sb) return NULL; cifs_inode->cifsAttrs = 0x20; /* default */ cifs_inode->time = 0; - cifs_inode->write_behind_rc = 0; /* Until the file is open and we have gotten oplock info back from the server, can not assume caching of file data or metadata */ - cifs_inode->clientCanCacheRead = false; - cifs_inode->clientCanCacheAll = false; + cifs_set_oplock_level(cifs_inode, 0); cifs_inode->delete_pending = false; cifs_inode->invalid_mapping = false; cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ cifs_inode->server_eof = 0; + cifs_inode->uniqueid = 0; + cifs_inode->createtime = 0; /* Can not set i_flags here - they get immediately overwritten to zero by the VFS */ @@ -336,10 +339,17 @@ cifs_alloc_inode(struct super_block *sb) return &cifs_inode->vfs_inode; } +static void cifs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); +} + static void cifs_destroy_inode(struct inode *inode) { - kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); + call_rcu(&inode->i_rcu, cifs_i_callback); } static void @@ -353,18 +363,19 @@ cifs_evict_inode(struct inode *inode) static void cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) { + struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; + struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; + seq_printf(s, ",addr="); - switch (server->addr.sockAddr.sin_family) { + switch (server->dstaddr.ss_family) { case AF_INET: - seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr); + seq_printf(s, "%pI4", &sa->sin_addr.s_addr); break; case AF_INET6: - seq_printf(s, "%pI6", - &server->addr.sockAddr6.sin6_addr.s6_addr); - if (server->addr.sockAddr6.sin6_scope_id) - seq_printf(s, "%%%u", - server->addr.sockAddr6.sin6_scope_id); + seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); + if (sa6->sin6_scope_id) + seq_printf(s, "%%%u", sa6->sin6_scope_id); break; default: seq_printf(s, "(unknown)"); @@ -460,9 +471,13 @@ cifs_show_options(struct seq_file *s, struct vfsmount *m) seq_printf(s, ",acl"); if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) seq_printf(s, ",mfsymlinks"); + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) + seq_printf(s, ",fsc"); seq_printf(s, ",rsize=%d", cifs_sb->rsize); seq_printf(s, ",wsize=%d", cifs_sb->wsize); + /* convert actimeo and display it in seconds */ + seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); return 0; } @@ -545,9 +560,9 @@ static const struct super_operations cifs_super_ops = { #endif }; -static int -cifs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry * +cifs_do_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { int rc; struct super_block *sb; @@ -557,18 +572,17 @@ cifs_get_sb(struct file_system_type *fs_type, cFYI(1, "Devname: %s flags: %d ", dev_name, flags); if (IS_ERR(sb)) - return PTR_ERR(sb); + return ERR_CAST(sb); sb->s_flags = flags; rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); if (rc) { deactivate_locked_super(sb); - return rc; + return ERR_PTR(rc); } sb->s_flags |= MS_ACTIVE; - simple_set_mnt(mnt, sb); - return 0; + return dget(sb->s_root); } static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, @@ -634,7 +648,7 @@ static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) struct file_system_type cifs_fs_type = { .owner = THIS_MODULE, .name = "cifs", - .get_sb = cifs_get_sb, + .mount = cifs_do_mount, .kill_sb = kill_anon_super, /* .fs_flags */ }; @@ -936,7 +950,6 @@ init_cifs(void) GlobalCurrentXid = 0; GlobalTotalActiveXid = 0; GlobalMaxActiveXid = 0; - memset(Local_System_Name, 0, 15); spin_lock_init(&cifs_tcp_ses_lock); spin_lock_init(&cifs_file_list_lock); spin_lock_init(&GlobalMid_Lock); diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index f35795a..897b2b2 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -112,5 +112,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg); extern const struct export_operations cifs_export_ops; #endif /* EXPERIMENTAL */ -#define CIFS_VERSION "1.67" +#define CIFS_VERSION "1.68" #endif /* _CIFSFS_H */ diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 3365e77f..606ca8b 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -25,6 +25,9 @@ #include <linux/workqueue.h> #include "cifs_fs_sb.h" #include "cifsacl.h" +#include <crypto/internal/hash.h> +#include <linux/scatterlist.h> + /* * The sizes of various internal tables and strings */ @@ -42,6 +45,16 @@ #define CIFS_MIN_RCV_POOL 4 /* + * default attribute cache timeout (jiffies) + */ +#define CIFS_DEF_ACTIMEO (1 * HZ) + +/* + * max attribute cache timeout (jiffies) - 2^30 + */ +#define CIFS_MAX_ACTIMEO (1 << 30) + +/* * MAX_REQ is the maximum number of requests that WE will send * on one socket concurrently. It also matches the most common * value of max multiplex returned by servers. We may @@ -74,7 +87,7 @@ * CIFS vfs client Status information (based on what we know.) */ - /* associated with each tcp and smb session */ +/* associated with each tcp and smb session */ enum statusEnum { CifsNew = 0, CifsGood, @@ -99,14 +112,29 @@ enum protocolEnum { struct session_key { unsigned int len; - union { - char ntlm[CIFS_SESS_KEY_SIZE + 16]; - char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */ - struct { - char key[16]; - struct ntlmv2_resp resp; - } ntlmv2; - } data; + char *response; +}; + +/* crypto security descriptor definition */ +struct sdesc { + struct shash_desc shash; + char ctx[]; +}; + +/* crypto hashing related structure/fields, not specific to a sec mech */ +struct cifs_secmech { + struct crypto_shash *hmacmd5; /* hmac-md5 hash function */ + struct crypto_shash *md5; /* md5 hash function */ + struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */ + struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */ +}; + +/* per smb session structure/fields */ +struct ntlmssp_auth { + __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */ + __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */ + unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */ + char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */ }; struct cifs_cred { @@ -135,10 +163,7 @@ struct TCP_Server_Info { char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; char *hostname; /* hostname portion of UNC string */ struct socket *ssocket; - union { - struct sockaddr_in sockAddr; - struct sockaddr_in6 sockAddr6; - } addr; + struct sockaddr_storage dstaddr; struct sockaddr_storage srcaddr; /* locally bind to this IP */ wait_queue_head_t response_q; wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ @@ -179,12 +204,14 @@ struct TCP_Server_Info { int capabilities; /* allow selective disabling of caps by smb sess */ int timeAdj; /* Adjust for difference in server time zone in sec */ __u16 CurrentMid; /* multiplex id - rotating counter */ + char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */ /* 16th byte of RFC1001 workstation name is always null */ char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; - __u32 sequence_number; /* needed for CIFS PDU signature */ + __u32 sequence_number; /* for signing, protected by srv_mutex */ struct session_key session_key; unsigned long lstrp; /* when we got last response from this server */ u16 dialect; /* dialect index that server chose */ + struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ /* extended security flavors that server supports */ bool sec_kerberos; /* supports plain Kerberos */ bool sec_mskerberos; /* supports legacy MS Kerberos */ @@ -222,11 +249,8 @@ struct cifsSesInfo { char userName[MAX_USERNAME_SIZE + 1]; char *domainName; char *password; - char cryptKey[CIFS_CRYPTO_KEY_SIZE]; struct session_key auth_key; - char ntlmv2_hash[16]; - unsigned int tilen; /* length of the target info blob */ - unsigned char *tiblob; /* target info blob in challenge response */ + struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */ bool need_reconnect:1; /* connection reset, uid now invalid */ }; /* no more than one of the following three session flags may be set */ @@ -319,7 +343,8 @@ struct cifsTconInfo { * "get" on the container. */ struct tcon_link { - unsigned long tl_index; + struct rb_node tl_rbnode; + uid_t tl_uid; unsigned long tl_flags; #define TCON_LINK_MASTER 0 #define TCON_LINK_PENDING 1 @@ -395,16 +420,19 @@ struct cifsFileInfo { struct list_head llist; /* list of byte range locks we have. */ bool invalidHandle:1; /* file closed via session abend */ bool oplock_break_cancelled:1; - atomic_t count; /* reference count */ + int count; /* refcount protected by cifs_file_list_lock */ struct mutex fh_mutex; /* prevents reopen race after dead ses*/ struct cifs_search_info srch_inf; struct work_struct oplock_break; /* work for oplock breaks */ }; -/* Take a reference on the file private data */ +/* + * Take a reference on the file private data. Must be called with + * cifs_file_list_lock held. + */ static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file) { - atomic_inc(&cifs_file->count); + ++cifs_file->count; } void cifsFileInfo_put(struct cifsFileInfo *cifs_file); @@ -417,7 +445,6 @@ struct cifsInodeInfo { struct list_head lockList; /* BB add in lists for dirty pages i.e. write caching info for oplock */ struct list_head openFileList; - int write_behind_rc; __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ unsigned long time; /* jiffies of last update/check of inode */ bool clientCanCacheRead:1; /* read oplock */ @@ -426,6 +453,7 @@ struct cifsInodeInfo { bool invalid_mapping:1; /* pagecache is invalid */ u64 server_eof; /* current file size on server */ u64 uniqueid; /* server inode number */ + u64 createtime; /* creation time on server */ #ifdef CONFIG_CIFS_FSCACHE struct fscache_cookie *fscache; #endif @@ -546,6 +574,7 @@ struct cifs_fattr { u64 cf_uniqueid; u64 cf_eof; u64 cf_bytes; + u64 cf_createtime; uid_t cf_uid; gid_t cf_gid; umode_t cf_mode; @@ -668,7 +697,7 @@ require use of the stronger protocol */ * GlobalMid_Lock protects: * list operations on pending_mid_q and oplockQ * updates to XID counters, multiplex id and SMB sequence numbers - * GlobalSMBSesLock protects: + * cifs_file_list_lock protects: * list operations on tcp and SMB session lists and tCon lists * f_owner.lock protects certain per file struct operations * mapping->page_lock protects certain per page operations @@ -726,8 +755,6 @@ GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */ /* on midQ entries */ -GLOBAL_EXTERN char Local_System_Name[15]; - /* * Global counters, updated atomically */ diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h index b0f4b56..de36b09 100644 --- a/fs/cifs/cifspdu.h +++ b/fs/cifs/cifspdu.h @@ -131,9 +131,20 @@ #define CIFS_CRYPTO_KEY_SIZE (8) /* + * Size of the ntlm client response + */ +#define CIFS_AUTH_RESP_SIZE (24) + +/* * Size of the session key (crypto key encrypted with the password */ -#define CIFS_SESS_KEY_SIZE (24) +#define CIFS_SESS_KEY_SIZE (16) + +#define CIFS_CLIENT_CHALLENGE_SIZE (8) +#define CIFS_SERVER_CHALLENGE_SIZE (8) +#define CIFS_HMAC_MD5_HASH_SIZE (16) +#define CIFS_CPHTXT_SIZE (16) +#define CIFS_NTHASH_SIZE (16) /* * Maximum user name length diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index e593c40..e6d1481 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -54,7 +54,8 @@ do { \ __func__, curr_xid, (int)rc); \ } while (0) extern char *build_path_from_dentry(struct dentry *); -extern char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb); +extern char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb, + struct cifsTconInfo *tcon); extern char *build_wildcard_path_from_dentry(struct dentry *direntry); extern char *cifs_compose_mount_options(const char *sb_mountdata, const char *fullpath, const struct dfs_info3_param *ref, @@ -79,9 +80,7 @@ extern bool is_valid_oplock_break(struct smb_hdr *smb, struct TCP_Server_Info *); extern bool is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof); extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool); -#ifdef CONFIG_CIFS_EXPERIMENTAL extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool); -#endif extern unsigned int smbCalcSize(struct smb_hdr *ptr); extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr); extern int decode_negTokenInit(unsigned char *security_blob, int length, @@ -104,6 +103,7 @@ extern struct timespec cifs_NTtimeToUnix(__le64 utc_nanoseconds_since_1601); extern u64 cifs_UnixTimeToNT(struct timespec); extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset); +extern void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock); extern struct cifsFileInfo *cifs_new_fileinfo(__u16 fileHandle, struct file *file, struct tcon_link *tlink, @@ -129,10 +129,12 @@ extern int cifs_get_file_info_unix(struct file *filp); extern int cifs_get_inode_info_unix(struct inode **pinode, const unsigned char *search_path, struct super_block *sb, int xid); -extern void cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, +extern int cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr, struct inode *inode, const char *path, const __u16 *pfid); -extern int mode_to_acl(struct inode *inode, const char *path, __u64); +extern int mode_to_cifs_acl(struct inode *inode, const char *path, __u64); +extern struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *, struct inode *, + const char *, u32 *); extern int cifs_mount(struct super_block *, struct cifs_sb_info *, char *, const char *); @@ -362,13 +364,15 @@ extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *, __u32 *); extern int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *, __u32 *); extern int cifs_verify_signature(struct smb_hdr *, - const struct session_key *session_key, + struct TCP_Server_Info *server, __u32 expected_sequence_number); -extern int cifs_calculate_session_key(struct session_key *key, const char *rn, - const char *pass); -extern void CalcNTLMv2_response(const struct cifsSesInfo *, char *); -extern int setup_ntlmv2_rsp(struct cifsSesInfo *, char *, - const struct nls_table *); +extern void SMBNTencrypt(unsigned char *, unsigned char *, unsigned char *); +extern int setup_ntlm_response(struct cifsSesInfo *); +extern int setup_ntlmv2_rsp(struct cifsSesInfo *, const struct nls_table *); +extern int cifs_crypto_shash_allocate(struct TCP_Server_Info *); +extern void cifs_crypto_shash_release(struct TCP_Server_Info *); +extern int calc_seckey(struct cifsSesInfo *); + #ifdef CONFIG_CIFS_WEAK_PW_HASH extern void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt, char *lnm_session_key); diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index e98f1f3..2f6795e 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -401,15 +401,12 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) { cFYI(1, "Kerberos only mechanism, enable extended security"); pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; - } -#ifdef CONFIG_CIFS_EXPERIMENTAL - else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) + } else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) { cFYI(1, "NTLMSSP only mechanism, enable extended security"); pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC; } -#endif count = 0; for (i = 0; i < CIFS_NUM_PROT; i++) { @@ -503,7 +500,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) if (rsp->EncryptionKeyLength == cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) { - memcpy(ses->cryptKey, rsp->EncryptionKey, + memcpy(ses->server->cryptkey, rsp->EncryptionKey, CIFS_CRYPTO_KEY_SIZE); } else if (server->secMode & SECMODE_PW_ENCRYPT) { rc = -EIO; /* need cryptkey unless plain text */ @@ -574,7 +571,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone); server->timeAdj *= 60; if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) { - memcpy(ses->cryptKey, pSMBr->u.EncryptionKey, + memcpy(ses->server->cryptkey, pSMBr->u.EncryptionKey, CIFS_CRYPTO_KEY_SIZE); } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC) && (pSMBr->EncryptionKeyLength == 0)) { @@ -2478,95 +2475,6 @@ querySymLinkRetry: } #ifdef CONFIG_CIFS_EXPERIMENTAL -/* Initialize NT TRANSACT SMB into small smb request buffer. - This assumes that all NT TRANSACTS that we init here have - total parm and data under about 400 bytes (to fit in small cifs - buffer size), which is the case so far, it easily fits. NB: - Setup words themselves and ByteCount - MaxSetupCount (size of returned setup area) and - MaxParameterCount (returned parms size) must be set by caller */ -static int -smb_init_nttransact(const __u16 sub_command, const int setup_count, - const int parm_len, struct cifsTconInfo *tcon, - void **ret_buf) -{ - int rc; - __u32 temp_offset; - struct smb_com_ntransact_req *pSMB; - - rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon, - (void **)&pSMB); - if (rc) - return rc; - *ret_buf = (void *)pSMB; - pSMB->Reserved = 0; - pSMB->TotalParameterCount = cpu_to_le32(parm_len); - pSMB->TotalDataCount = 0; - pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf - - MAX_CIFS_HDR_SIZE) & 0xFFFFFF00); - pSMB->ParameterCount = pSMB->TotalParameterCount; - pSMB->DataCount = pSMB->TotalDataCount; - temp_offset = offsetof(struct smb_com_ntransact_req, Parms) + - (setup_count * 2) - 4 /* for rfc1001 length itself */; - pSMB->ParameterOffset = cpu_to_le32(temp_offset); - pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len); - pSMB->SetupCount = setup_count; /* no need to le convert byte fields */ - pSMB->SubCommand = cpu_to_le16(sub_command); - return 0; -} - -static int -validate_ntransact(char *buf, char **ppparm, char **ppdata, - __u32 *pparmlen, __u32 *pdatalen) -{ - char *end_of_smb; - __u32 data_count, data_offset, parm_count, parm_offset; - struct smb_com_ntransact_rsp *pSMBr; - - *pdatalen = 0; - *pparmlen = 0; - - if (buf == NULL) - return -EINVAL; - - pSMBr = (struct smb_com_ntransact_rsp *)buf; - - /* ByteCount was converted from little endian in SendReceive */ - end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount + - (char *)&pSMBr->ByteCount; - - data_offset = le32_to_cpu(pSMBr->DataOffset); - data_count = le32_to_cpu(pSMBr->DataCount); - parm_offset = le32_to_cpu(pSMBr->ParameterOffset); - parm_count = le32_to_cpu(pSMBr->ParameterCount); - - *ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset; - *ppdata = (char *)&pSMBr->hdr.Protocol + data_offset; - - /* should we also check that parm and data areas do not overlap? */ - if (*ppparm > end_of_smb) { - cFYI(1, "parms start after end of smb"); - return -EINVAL; - } else if (parm_count + *ppparm > end_of_smb) { - cFYI(1, "parm end after end of smb"); - return -EINVAL; - } else if (*ppdata > end_of_smb) { - cFYI(1, "data starts after end of smb"); - return -EINVAL; - } else if (data_count + *ppdata > end_of_smb) { - cFYI(1, "data %p + count %d (%p) past smb end %p start %p", - *ppdata, data_count, (data_count + *ppdata), - end_of_smb, pSMBr); - return -EINVAL; - } else if (parm_count + data_count > pSMBr->ByteCount) { - cFYI(1, "parm count and data count larger than SMB"); - return -EINVAL; - } - *pdatalen = data_count; - *pparmlen = parm_count; - return 0; -} - int CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon, const unsigned char *searchName, @@ -3056,7 +2964,97 @@ GetExtAttrOut: #endif /* CONFIG_POSIX */ -#ifdef CONFIG_CIFS_EXPERIMENTAL +#ifdef CONFIG_CIFS_ACL +/* + * Initialize NT TRANSACT SMB into small smb request buffer. This assumes that + * all NT TRANSACTS that we init here have total parm and data under about 400 + * bytes (to fit in small cifs buffer size), which is the case so far, it + * easily fits. NB: Setup words themselves and ByteCount MaxSetupCount (size of + * returned setup area) and MaxParameterCount (returned parms size) must be set + * by caller + */ +static int +smb_init_nttransact(const __u16 sub_command, const int setup_count, + const int parm_len, struct cifsTconInfo *tcon, + void **ret_buf) +{ + int rc; + __u32 temp_offset; + struct smb_com_ntransact_req *pSMB; + + rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon, + (void **)&pSMB); + if (rc) + return rc; + *ret_buf = (void *)pSMB; + pSMB->Reserved = 0; + pSMB->TotalParameterCount = cpu_to_le32(parm_len); + pSMB->TotalDataCount = 0; + pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf - + MAX_CIFS_HDR_SIZE) & 0xFFFFFF00); + pSMB->ParameterCount = pSMB->TotalParameterCount; + pSMB->DataCount = pSMB->TotalDataCount; + temp_offset = offsetof(struct smb_com_ntransact_req, Parms) + + (setup_count * 2) - 4 /* for rfc1001 length itself */; + pSMB->ParameterOffset = cpu_to_le32(temp_offset); + pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len); + pSMB->SetupCount = setup_count; /* no need to le convert byte fields */ + pSMB->SubCommand = cpu_to_le16(sub_command); + return 0; +} + +static int +validate_ntransact(char *buf, char **ppparm, char **ppdata, + __u32 *pparmlen, __u32 *pdatalen) +{ + char *end_of_smb; + __u32 data_count, data_offset, parm_count, parm_offset; + struct smb_com_ntransact_rsp *pSMBr; + + *pdatalen = 0; + *pparmlen = 0; + + if (buf == NULL) + return -EINVAL; + + pSMBr = (struct smb_com_ntransact_rsp *)buf; + + /* ByteCount was converted from little endian in SendReceive */ + end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount + + (char *)&pSMBr->ByteCount; + + data_offset = le32_to_cpu(pSMBr->DataOffset); + data_count = le32_to_cpu(pSMBr->DataCount); + parm_offset = le32_to_cpu(pSMBr->ParameterOffset); + parm_count = le32_to_cpu(pSMBr->ParameterCount); + + *ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset; + *ppdata = (char *)&pSMBr->hdr.Protocol + data_offset; + + /* should we also check that parm and data areas do not overlap? */ + if (*ppparm > end_of_smb) { + cFYI(1, "parms start after end of smb"); + return -EINVAL; + } else if (parm_count + *ppparm > end_of_smb) { + cFYI(1, "parm end after end of smb"); + return -EINVAL; + } else if (*ppdata > end_of_smb) { + cFYI(1, "data starts after end of smb"); + return -EINVAL; + } else if (data_count + *ppdata > end_of_smb) { + cFYI(1, "data %p + count %d (%p) past smb end %p start %p", + *ppdata, data_count, (data_count + *ppdata), + end_of_smb, pSMBr); + return -EINVAL; + } else if (parm_count + data_count > pSMBr->ByteCount) { + cFYI(1, "parm count and data count larger than SMB"); + return -EINVAL; + } + *pdatalen = data_count; + *pparmlen = parm_count; + return 0; +} + /* Get Security Descriptor (by handle) from remote server for a file or dir */ int CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid, @@ -3214,7 +3212,7 @@ setCifsAclRetry: return (rc); } -#endif /* CONFIG_CIFS_EXPERIMENTAL */ +#endif /* CONFIG_CIFS_ACL */ /* Legacy Query Path Information call for lookup to old servers such as Win9x/WinME */ diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 7e73176..a65d311 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -64,8 +64,8 @@ struct smb_vol { char *UNC; char *UNCip; char *iocharset; /* local code page for mapping to and from Unicode */ - char source_rfc1001_name[16]; /* netbios name of client */ - char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */ + char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */ + char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */ uid_t cred_uid; uid_t linux_uid; gid_t linux_gid; @@ -105,6 +105,7 @@ struct smb_vol { unsigned int wsize; bool sockopt_tcp_nodelay:1; unsigned short int port; + unsigned long actimeo; /* attribute cache timeout (jiffies) */ char *prepath; struct sockaddr_storage srcaddr; /* allow binding to a local IP */ struct nls_table *local_nls; @@ -114,8 +115,9 @@ struct smb_vol { #define TLINK_ERROR_EXPIRE (1 * HZ) #define TLINK_IDLE_EXPIRE (600 * HZ) -static int ipv4_connect(struct TCP_Server_Info *server); -static int ipv6_connect(struct TCP_Server_Info *server); +static int ip_connect(struct TCP_Server_Info *server); +static int generic_ip_connect(struct TCP_Server_Info *server); +static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); static void cifs_prune_tlinks(struct work_struct *work); /* @@ -175,6 +177,9 @@ cifs_reconnect(struct TCP_Server_Info *server) } server->sequence_number = 0; server->session_estab = false; + kfree(server->session_key.response); + server->session_key.response = NULL; + server->session_key.len = 0; spin_lock(&GlobalMid_Lock); list_for_each(tmp, &server->pending_mid_q) { @@ -195,10 +200,9 @@ cifs_reconnect(struct TCP_Server_Info *server) while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood)) { try_to_freeze(); - if (server->addr.sockAddr6.sin6_family == AF_INET6) - rc = ipv6_connect(server); - else - rc = ipv4_connect(server); + + /* we should try only the port we connected to before */ + rc = generic_ip_connect(server); if (rc) { cFYI(1, "reconnect error %d", rc); msleep(3000); @@ -472,7 +476,7 @@ incomplete_rcv: * initialize frame) */ cifs_set_port((struct sockaddr *) - &server->addr.sockAddr, CIFS_PORT); + &server->dstaddr, CIFS_PORT); cifs_reconnect(server); csocket = server->ssocket; wake_up(&server->response_q); @@ -802,24 +806,21 @@ cifs_parse_mount_options(char *options, const char *devname, short int override_gid = -1; bool uid_specified = false; bool gid_specified = false; + char *nodename = utsname()->nodename; separator[0] = ','; separator[1] = 0; - if (Local_System_Name[0] != 0) - memcpy(vol->source_rfc1001_name, Local_System_Name, 15); - else { - char *nodename = utsname()->nodename; - int n = strnlen(nodename, 15); - memset(vol->source_rfc1001_name, 0x20, 15); - for (i = 0; i < n; i++) { - /* does not have to be perfect mapping since field is - informational, only used for servers that do not support - port 445 and it can be overridden at mount time */ - vol->source_rfc1001_name[i] = toupper(nodename[i]); - } - } - vol->source_rfc1001_name[15] = 0; + /* + * does not have to be perfect mapping since field is + * informational, only used for servers that do not support + * port 445 and it can be overridden at mount time + */ + memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); + for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) + vol->source_rfc1001_name[i] = toupper(nodename[i]); + + vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; /* null target name indicates to use *SMBSERVR default called name if we end up sending RFC1001 session initialize */ vol->target_rfc1001_name[0] = 0; @@ -836,6 +837,8 @@ cifs_parse_mount_options(char *options, const char *devname, /* default to using server inode numbers where available */ vol->server_ino = 1; + vol->actimeo = CIFS_DEF_ACTIMEO; + if (!options) return 1; @@ -981,13 +984,11 @@ cifs_parse_mount_options(char *options, const char *devname, return 1; } else if (strnicmp(value, "krb5", 4) == 0) { vol->secFlg |= CIFSSEC_MAY_KRB5; -#ifdef CONFIG_CIFS_EXPERIMENTAL } else if (strnicmp(value, "ntlmsspi", 8) == 0) { vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; } else if (strnicmp(value, "ntlmssp", 7) == 0) { vol->secFlg |= CIFSSEC_MAY_NTLMSSP; -#endif } else if (strnicmp(value, "ntlmv2i", 7) == 0) { vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; @@ -1064,7 +1065,7 @@ cifs_parse_mount_options(char *options, const char *devname, } i = cifs_convert_address((struct sockaddr *)&vol->srcaddr, value, strlen(value)); - if (i < 0) { + if (i == 0) { printk(KERN_WARNING "CIFS: Could not parse" " srcaddr: %s\n", value); @@ -1164,22 +1165,22 @@ cifs_parse_mount_options(char *options, const char *devname, if (!value || !*value || (*value == ' ')) { cFYI(1, "invalid (empty) netbiosname"); } else { - memset(vol->source_rfc1001_name, 0x20, 15); - for (i = 0; i < 15; i++) { - /* BB are there cases in which a comma can be - valid in this workstation netbios name (and need - special handling)? */ - - /* We do not uppercase netbiosname for user */ + memset(vol->source_rfc1001_name, 0x20, + RFC1001_NAME_LEN); + /* + * FIXME: are there cases in which a comma can + * be valid in workstation netbios name (and + * need special handling)? + */ + for (i = 0; i < RFC1001_NAME_LEN; i++) { + /* don't ucase netbiosname for user */ if (value[i] == 0) break; - else - vol->source_rfc1001_name[i] = - value[i]; + vol->source_rfc1001_name[i] = value[i]; } /* The string has 16th byte zero still from set at top of the function */ - if ((i == 15) && (value[i] != 0)) + if (i == RFC1001_NAME_LEN && value[i] != 0) printk(KERN_WARNING "CIFS: netbiosname" " longer than 15 truncated.\n"); } @@ -1189,7 +1190,8 @@ cifs_parse_mount_options(char *options, const char *devname, cFYI(1, "empty server netbiosname specified"); } else { /* last byte, type, is 0x20 for servr type */ - memset(vol->target_rfc1001_name, 0x20, 16); + memset(vol->target_rfc1001_name, 0x20, + RFC1001_NAME_LEN_WITH_NULL); for (i = 0; i < 15; i++) { /* BB are there cases in which a comma can be @@ -1206,10 +1208,20 @@ cifs_parse_mount_options(char *options, const char *devname, } /* The string has 16th byte zero still from set at top of the function */ - if ((i == 15) && (value[i] != 0)) + if (i == RFC1001_NAME_LEN && value[i] != 0) printk(KERN_WARNING "CIFS: server net" "biosname longer than 15 truncated.\n"); } + } else if (strnicmp(data, "actimeo", 7) == 0) { + if (value && *value) { + vol->actimeo = HZ * simple_strtoul(value, + &value, 0); + if (vol->actimeo > CIFS_MAX_ACTIMEO) { + cERROR(1, "CIFS: attribute cache" + "timeout too large"); + return 1; + } + } } else if (strnicmp(data, "credentials", 4) == 0) { /* ignore */ } else if (strnicmp(data, "version", 3) == 0) { @@ -1327,10 +1339,8 @@ cifs_parse_mount_options(char *options, const char *devname, vol->no_psx_acl = 0; } else if (strnicmp(data, "noacl", 5) == 0) { vol->no_psx_acl = 1; -#ifdef CONFIG_CIFS_EXPERIMENTAL } else if (strnicmp(data, "locallease", 6) == 0) { vol->local_lease = 1; -#endif } else if (strnicmp(data, "sign", 4) == 0) { vol->secFlg |= CIFSSEC_MUST_SIGN; } else if (strnicmp(data, "seal", 4) == 0) { @@ -1348,6 +1358,11 @@ cifs_parse_mount_options(char *options, const char *devname, "supported. Instead set " "/proc/fs/cifs/LookupCacheEnabled to 0\n"); } else if (strnicmp(data, "fsc", 3) == 0) { +#ifndef CONFIG_CIFS_FSCACHE + cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE" + "kernel config option set"); + return 1; +#endif vol->fsc = true; } else if (strnicmp(data, "mfsymlinks", 10) == 0) { vol->mfsymlinks = true; @@ -1435,35 +1450,71 @@ srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) } } +/* + * If no port is specified in addr structure, we try to match with 445 port + * and if it fails - with 139 ports. It should be called only if address + * families of server and addr are equal. + */ +static bool +match_port(struct TCP_Server_Info *server, struct sockaddr *addr) +{ + unsigned short int port, *sport; + + switch (addr->sa_family) { + case AF_INET: + sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; + port = ((struct sockaddr_in *) addr)->sin_port; + break; + case AF_INET6: + sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; + port = ((struct sockaddr_in6 *) addr)->sin6_port; + break; + default: + WARN_ON(1); + return false; + } + + if (!port) { + port = htons(CIFS_PORT); + if (port == *sport) + return true; + + port = htons(RFC1001_PORT); + } + + return port == *sport; +} static bool match_address(struct TCP_Server_Info *server, struct sockaddr *addr, struct sockaddr *srcaddr) { - struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; - struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; - switch (addr->sa_family) { - case AF_INET: - if (addr4->sin_addr.s_addr != - server->addr.sockAddr.sin_addr.s_addr) - return false; - if (addr4->sin_port && - addr4->sin_port != server->addr.sockAddr.sin_port) + case AF_INET: { + struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; + struct sockaddr_in *srv_addr4 = + (struct sockaddr_in *)&server->dstaddr; + + if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) return false; break; - case AF_INET6: + } + case AF_INET6: { + struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; + struct sockaddr_in6 *srv_addr6 = + (struct sockaddr_in6 *)&server->dstaddr; + if (!ipv6_addr_equal(&addr6->sin6_addr, - &server->addr.sockAddr6.sin6_addr)) + &srv_addr6->sin6_addr)) return false; - if (addr6->sin6_scope_id != - server->addr.sockAddr6.sin6_scope_id) - return false; - if (addr6->sin6_port && - addr6->sin6_port != server->addr.sockAddr6.sin6_port) + if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) return false; break; } + default: + WARN_ON(1); + return false; /* don't expect to be here */ + } if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) return false; @@ -1530,6 +1581,9 @@ cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) (struct sockaddr *)&vol->srcaddr)) continue; + if (!match_port(server, addr)) + continue; + if (!match_security(server, vol)) continue; @@ -1560,8 +1614,13 @@ cifs_put_tcp_session(struct TCP_Server_Info *server) server->tcpStatus = CifsExiting; spin_unlock(&GlobalMid_Lock); + cifs_crypto_shash_release(server); cifs_fscache_release_client_cookie(server); + kfree(server->session_key.response); + server->session_key.response = NULL; + server->session_key.len = 0; + task = xchg(&server->tsk, NULL); if (task) force_sig(SIGKILL, task); @@ -1614,10 +1673,16 @@ cifs_get_tcp_session(struct smb_vol *volume_info) goto out_err; } + rc = cifs_crypto_shash_allocate(tcp_ses); + if (rc) { + cERROR(1, "could not setup hash structures rc %d", rc); + goto out_err; + } + tcp_ses->hostname = extract_hostname(volume_info->UNC); if (IS_ERR(tcp_ses->hostname)) { rc = PTR_ERR(tcp_ses->hostname); - goto out_err; + goto out_err_crypto_release; } tcp_ses->noblocksnd = volume_info->noblocksnd; @@ -1651,17 +1716,16 @@ cifs_get_tcp_session(struct smb_vol *volume_info) cFYI(1, "attempting ipv6 connect"); /* BB should we allow ipv6 on port 139? */ /* other OS never observed in Wild doing 139 with v6 */ - memcpy(&tcp_ses->addr.sockAddr6, sin_server6, - sizeof(struct sockaddr_in6)); - rc = ipv6_connect(tcp_ses); - } else { - memcpy(&tcp_ses->addr.sockAddr, sin_server, - sizeof(struct sockaddr_in)); - rc = ipv4_connect(tcp_ses); - } + memcpy(&tcp_ses->dstaddr, sin_server6, + sizeof(struct sockaddr_in6)); + } else + memcpy(&tcp_ses->dstaddr, sin_server, + sizeof(struct sockaddr_in)); + + rc = ip_connect(tcp_ses); if (rc < 0) { cERROR(1, "Error connecting to socket. Aborting operation"); - goto out_err; + goto out_err_crypto_release; } /* @@ -1675,7 +1739,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info) rc = PTR_ERR(tcp_ses->tsk); cERROR(1, "error %d create cifsd thread", rc); module_put(THIS_MODULE); - goto out_err; + goto out_err_crypto_release; } /* thread spawned, put it on the list */ @@ -1687,6 +1751,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info) return tcp_ses; +out_err_crypto_release: + cifs_crypto_shash_release(tcp_ses); + out_err: if (tcp_ses) { if (!IS_ERR(tcp_ses->hostname)) @@ -1760,6 +1827,8 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) { int rc = -ENOMEM, xid; struct cifsSesInfo *ses; + struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; + struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; xid = GetXid(); @@ -1801,16 +1870,12 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) if (ses == NULL) goto get_ses_fail; - ses->tilen = 0; - ses->tiblob = NULL; /* new SMB session uses our server ref */ ses->server = server; - if (server->addr.sockAddr6.sin6_family == AF_INET6) - sprintf(ses->serverName, "%pI6", - &server->addr.sockAddr6.sin6_addr); + if (server->dstaddr.ss_family == AF_INET6) + sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); else - sprintf(ses->serverName, "%pI4", - &server->addr.sockAddr.sin_addr.s_addr); + sprintf(ses->serverName, "%pI4", &addr->sin_addr); if (volume_info->username) strncpy(ses->userName, volume_info->username, @@ -1823,10 +1888,9 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) goto get_ses_fail; } if (volume_info->domainname) { - int len = strlen(volume_info->domainname); - ses->domainName = kmalloc(len + 1, GFP_KERNEL); - if (ses->domainName) - strcpy(ses->domainName, volume_info->domainname); + ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); + if (!ses->domainName) + goto get_ses_fail; } ses->cred_uid = volume_info->cred_uid; ses->linux_uid = volume_info->linux_uid; @@ -2106,19 +2170,106 @@ bind_socket(struct TCP_Server_Info *server) } static int -ipv4_connect(struct TCP_Server_Info *server) +ip_rfc1001_connect(struct TCP_Server_Info *server) +{ + int rc = 0; + /* + * some servers require RFC1001 sessinit before sending + * negprot - BB check reconnection in case where second + * sessinit is sent but no second negprot + */ + struct rfc1002_session_packet *ses_init_buf; + struct smb_hdr *smb_buf; + ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), + GFP_KERNEL); + if (ses_init_buf) { + ses_init_buf->trailer.session_req.called_len = 32; + + if (server->server_RFC1001_name && + server->server_RFC1001_name[0] != 0) + rfc1002mangle(ses_init_buf->trailer. + session_req.called_name, + server->server_RFC1001_name, + RFC1001_NAME_LEN_WITH_NULL); + else + rfc1002mangle(ses_init_buf->trailer. + session_req.called_name, + DEFAULT_CIFS_CALLED_NAME, + RFC1001_NAME_LEN_WITH_NULL); + + ses_init_buf->trailer.session_req.calling_len = 32; + + /* + * calling name ends in null (byte 16) from old smb + * convention. + */ + if (server->workstation_RFC1001_name && + server->workstation_RFC1001_name[0] != 0) + rfc1002mangle(ses_init_buf->trailer. + session_req.calling_name, + server->workstation_RFC1001_name, + RFC1001_NAME_LEN_WITH_NULL); + else + rfc1002mangle(ses_init_buf->trailer. + session_req.calling_name, + "LINUX_CIFS_CLNT", + RFC1001_NAME_LEN_WITH_NULL); + + ses_init_buf->trailer.session_req.scope1 = 0; + ses_init_buf->trailer.session_req.scope2 = 0; + smb_buf = (struct smb_hdr *)ses_init_buf; + + /* sizeof RFC1002_SESSION_REQUEST with no scope */ + smb_buf->smb_buf_length = 0x81000044; + rc = smb_send(server, smb_buf, 0x44); + kfree(ses_init_buf); + /* + * RFC1001 layer in at least one server + * requires very short break before negprot + * presumably because not expecting negprot + * to follow so fast. This is a simple + * solution that works without + * complicating the code and causes no + * significant slowing down on mount + * for everyone else + */ + usleep_range(1000, 2000); + } + /* + * else the negprot may still work without this + * even though malloc failed + */ + + return rc; +} + +static int +generic_ip_connect(struct TCP_Server_Info *server) { int rc = 0; - int val; - bool connected = false; - __be16 orig_port = 0; + unsigned short int sport; + int slen, sfamily; struct socket *socket = server->ssocket; + struct sockaddr *saddr; + + saddr = (struct sockaddr *) &server->dstaddr; + + if (server->dstaddr.ss_family == AF_INET6) { + sport = ((struct sockaddr_in6 *) saddr)->sin6_port; + slen = sizeof(struct sockaddr_in6); + sfamily = AF_INET6; + } else { + sport = ((struct sockaddr_in *) saddr)->sin_port; + slen = sizeof(struct sockaddr_in); + sfamily = AF_INET; + } if (socket == NULL) { - rc = sock_create_kern(PF_INET, SOCK_STREAM, + rc = sock_create_kern(sfamily, SOCK_STREAM, IPPROTO_TCP, &socket); if (rc < 0) { cERROR(1, "Error %d creating socket", rc); + server->ssocket = NULL; return rc; } @@ -2126,63 +2277,28 @@ ipv4_connect(struct TCP_Server_Info *server) cFYI(1, "Socket created"); server->ssocket = socket; socket->sk->sk_allocation = GFP_NOFS; - cifs_reclassify_socket4(socket); + if (sfamily == AF_INET6) + cifs_reclassify_socket6(socket); + else + cifs_reclassify_socket4(socket); } rc = bind_socket(server); if (rc < 0) return rc; - /* user overrode default port */ - if (server->addr.sockAddr.sin_port) { - rc = socket->ops->connect(socket, (struct sockaddr *) - &server->addr.sockAddr, - sizeof(struct sockaddr_in), 0); - if (rc >= 0) - connected = true; - } - - if (!connected) { - /* save original port so we can retry user specified port - later if fall back ports fail this time */ - orig_port = server->addr.sockAddr.sin_port; - - /* do not retry on the same port we just failed on */ - if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) { - server->addr.sockAddr.sin_port = htons(CIFS_PORT); - rc = socket->ops->connect(socket, - (struct sockaddr *) - &server->addr.sockAddr, - sizeof(struct sockaddr_in), 0); - if (rc >= 0) - connected = true; - } - } - if (!connected) { - server->addr.sockAddr.sin_port = htons(RFC1001_PORT); - rc = socket->ops->connect(socket, (struct sockaddr *) - &server->addr.sockAddr, - sizeof(struct sockaddr_in), 0); - if (rc >= 0) - connected = true; - } - - /* give up here - unless we want to retry on different - protocol families some day */ - if (!connected) { - if (orig_port) - server->addr.sockAddr.sin_port = orig_port; - cFYI(1, "Error %d connecting to server via ipv4", rc); + rc = socket->ops->connect(socket, saddr, slen, 0); + if (rc < 0) { + cFYI(1, "Error %d connecting to server", rc); sock_release(socket); server->ssocket = NULL; return rc; } - /* * Eventually check for other socket options to change from - * the default. sock_setsockopt not used because it expects - * user space buffer + * the default. sock_setsockopt not used because it expects + * user space buffer */ socket->sk->sk_rcvtimeo = 7 * HZ; socket->sk->sk_sndtimeo = 5 * HZ; @@ -2196,7 +2312,7 @@ ipv4_connect(struct TCP_Server_Info *server) } if (server->tcp_nodelay) { - val = 1; + int val = 1; rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, (char *)&val, sizeof(val)); if (rc) @@ -2207,161 +2323,39 @@ ipv4_connect(struct TCP_Server_Info *server) socket->sk->sk_sndbuf, socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); - /* send RFC1001 sessinit */ - if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) { - /* some servers require RFC1001 sessinit before sending - negprot - BB check reconnection in case where second - sessinit is sent but no second negprot */ - struct rfc1002_session_packet *ses_init_buf; - struct smb_hdr *smb_buf; - ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), - GFP_KERNEL); - if (ses_init_buf) { - ses_init_buf->trailer.session_req.called_len = 32; - if (server->server_RFC1001_name && - server->server_RFC1001_name[0] != 0) - rfc1002mangle(ses_init_buf->trailer. - session_req.called_name, - server->server_RFC1001_name, - RFC1001_NAME_LEN_WITH_NULL); - else - rfc1002mangle(ses_init_buf->trailer. - session_req.called_name, - DEFAULT_CIFS_CALLED_NAME, - RFC1001_NAME_LEN_WITH_NULL); - - ses_init_buf->trailer.session_req.calling_len = 32; - - /* calling name ends in null (byte 16) from old smb - convention. */ - if (server->workstation_RFC1001_name && - server->workstation_RFC1001_name[0] != 0) - rfc1002mangle(ses_init_buf->trailer. - session_req.calling_name, - server->workstation_RFC1001_name, - RFC1001_NAME_LEN_WITH_NULL); - else - rfc1002mangle(ses_init_buf->trailer. - session_req.calling_name, - "LINUX_CIFS_CLNT", - RFC1001_NAME_LEN_WITH_NULL); - - ses_init_buf->trailer.session_req.scope1 = 0; - ses_init_buf->trailer.session_req.scope2 = 0; - smb_buf = (struct smb_hdr *)ses_init_buf; - /* sizeof RFC1002_SESSION_REQUEST with no scope */ - smb_buf->smb_buf_length = 0x81000044; - rc = smb_send(server, smb_buf, 0x44); - kfree(ses_init_buf); - msleep(1); /* RFC1001 layer in at least one server - requires very short break before negprot - presumably because not expecting negprot - to follow so fast. This is a simple - solution that works without - complicating the code and causes no - significant slowing down on mount - for everyone else */ - } - /* else the negprot may still work without this - even though malloc failed */ - - } + if (sport == htons(RFC1001_PORT)) + rc = ip_rfc1001_connect(server); return rc; } static int -ipv6_connect(struct TCP_Server_Info *server) +ip_connect(struct TCP_Server_Info *server) { - int rc = 0; - int val; - bool connected = false; - __be16 orig_port = 0; - struct socket *socket = server->ssocket; + unsigned short int *sport; + struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; + struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; - if (socket == NULL) { - rc = sock_create_kern(PF_INET6, SOCK_STREAM, - IPPROTO_TCP, &socket); - if (rc < 0) { - cERROR(1, "Error %d creating ipv6 socket", rc); - socket = NULL; - return rc; - } + if (server->dstaddr.ss_family == AF_INET6) + sport = &addr6->sin6_port; + else + sport = &addr->sin_port; - /* BB other socket options to set KEEPALIVE, NODELAY? */ - cFYI(1, "ipv6 Socket created"); - server->ssocket = socket; - socket->sk->sk_allocation = GFP_NOFS; - cifs_reclassify_socket6(socket); - } + if (*sport == 0) { + int rc; - rc = bind_socket(server); - if (rc < 0) - return rc; + /* try with 445 port at first */ + *sport = htons(CIFS_PORT); - /* user overrode default port */ - if (server->addr.sockAddr6.sin6_port) { - rc = socket->ops->connect(socket, - (struct sockaddr *) &server->addr.sockAddr6, - sizeof(struct sockaddr_in6), 0); + rc = generic_ip_connect(server); if (rc >= 0) - connected = true; - } - - if (!connected) { - /* save original port so we can retry user specified port - later if fall back ports fail this time */ - - orig_port = server->addr.sockAddr6.sin6_port; - /* do not retry on the same port we just failed on */ - if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) { - server->addr.sockAddr6.sin6_port = htons(CIFS_PORT); - rc = socket->ops->connect(socket, (struct sockaddr *) - &server->addr.sockAddr6, - sizeof(struct sockaddr_in6), 0); - if (rc >= 0) - connected = true; - } - } - if (!connected) { - server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT); - rc = socket->ops->connect(socket, (struct sockaddr *) - &server->addr.sockAddr6, - sizeof(struct sockaddr_in6), 0); - if (rc >= 0) - connected = true; - } - - /* give up here - unless we want to retry on different - protocol families some day */ - if (!connected) { - if (orig_port) - server->addr.sockAddr6.sin6_port = orig_port; - cFYI(1, "Error %d connecting to server via ipv6", rc); - sock_release(socket); - server->ssocket = NULL; - return rc; - } - - /* - * Eventually check for other socket options to change from - * the default. sock_setsockopt not used because it expects - * user space buffer - */ - socket->sk->sk_rcvtimeo = 7 * HZ; - socket->sk->sk_sndtimeo = 5 * HZ; + return rc; - if (server->tcp_nodelay) { - val = 1; - rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, - (char *)&val, sizeof(val)); - if (rc) - cFYI(1, "set TCP_NODELAY socket option error %d", rc); + /* if it failed, try with 139 port */ + *sport = htons(RFC1001_PORT); } - server->ssocket = socket; - - return rc; + return generic_ip_connect(server); } void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, @@ -2551,6 +2545,8 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info, cFYI(1, "file mode: 0x%x dir mode: 0x%x", cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); + cifs_sb->actimeo = pvolume_info->actimeo; + if (pvolume_info->noperm) cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; if (pvolume_info->setuids) @@ -2801,13 +2797,13 @@ remote_path_check: /* check if a whole path (including prepath) is not remote */ if (!rc && cifs_sb->prepathlen && tcon) { /* build_path_to_root works only when we have a valid tcon */ - full_path = cifs_build_path_to_root(cifs_sb); + full_path = cifs_build_path_to_root(cifs_sb, tcon); if (full_path == NULL) { rc = -ENOMEM; goto mount_fail_check; } rc = is_path_accessible(xid, tcon, cifs_sb, full_path); - if (rc != -EREMOTE) { + if (rc != 0 && rc != -EREMOTE) { kfree(full_path); goto mount_fail_check; } @@ -2886,24 +2882,16 @@ remote_path_check: goto mount_fail_check; } - tlink->tl_index = pSesInfo->linux_uid; + tlink->tl_uid = pSesInfo->linux_uid; tlink->tl_tcon = tcon; tlink->tl_time = jiffies; set_bit(TCON_LINK_MASTER, &tlink->tl_flags); set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); - rc = radix_tree_preload(GFP_KERNEL); - if (rc == -ENOMEM) { - kfree(tlink); - goto mount_fail_check; - } - + cifs_sb->master_tlink = tlink; spin_lock(&cifs_sb->tlink_tree_lock); - radix_tree_insert(&cifs_sb->tlink_tree, pSesInfo->linux_uid, tlink); - radix_tree_tag_set(&cifs_sb->tlink_tree, pSesInfo->linux_uid, - CIFS_TLINK_MASTER_TAG); + tlink_rb_insert(&cifs_sb->tlink_tree, tlink); spin_unlock(&cifs_sb->tlink_tree_lock); - radix_tree_preload_end(); queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, TLINK_IDLE_EXPIRE); @@ -2985,13 +2973,13 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, #ifdef CONFIG_CIFS_WEAK_PW_HASH if ((global_secflags & CIFSSEC_MAY_LANMAN) && (ses->server->secType == LANMAN)) - calc_lanman_hash(tcon->password, ses->cryptKey, + calc_lanman_hash(tcon->password, ses->server->cryptkey, ses->server->secMode & SECMODE_PW_ENCRYPT ? true : false, bcc_ptr); else #endif /* CIFS_WEAK_PW_HASH */ - SMBNTencrypt(tcon->password, ses->cryptKey, bcc_ptr); + SMBNTencrypt(tcon->password, ses->server->cryptkey, bcc_ptr); bcc_ptr += CIFS_SESS_KEY_SIZE; if (ses->capabilities & CAP_UNICODE) { @@ -3093,32 +3081,25 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, int cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) { - int i, ret; + struct rb_root *root = &cifs_sb->tlink_tree; + struct rb_node *node; + struct tcon_link *tlink; char *tmp; - struct tcon_link *tlink[8]; - unsigned long index = 0; cancel_delayed_work_sync(&cifs_sb->prune_tlinks); - do { - spin_lock(&cifs_sb->tlink_tree_lock); - ret = radix_tree_gang_lookup(&cifs_sb->tlink_tree, - (void **)tlink, index, - ARRAY_SIZE(tlink)); - /* increment index for next pass */ - if (ret > 0) - index = tlink[ret - 1]->tl_index + 1; - for (i = 0; i < ret; i++) { - cifs_get_tlink(tlink[i]); - clear_bit(TCON_LINK_IN_TREE, &tlink[i]->tl_flags); - radix_tree_delete(&cifs_sb->tlink_tree, - tlink[i]->tl_index); - } - spin_unlock(&cifs_sb->tlink_tree_lock); + spin_lock(&cifs_sb->tlink_tree_lock); + while ((node = rb_first(root))) { + tlink = rb_entry(node, struct tcon_link, tl_rbnode); + cifs_get_tlink(tlink); + clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); + rb_erase(node, root); - for (i = 0; i < ret; i++) - cifs_put_tlink(tlink[i]); - } while (ret != 0); + spin_unlock(&cifs_sb->tlink_tree_lock); + cifs_put_tlink(tlink); + spin_lock(&cifs_sb->tlink_tree_lock); + } + spin_unlock(&cifs_sb->tlink_tree_lock); tmp = cifs_sb->prepath; cifs_sb->prepathlen = 0; @@ -3178,10 +3159,11 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, } else { mutex_lock(&ses->server->srv_mutex); if (!server->session_estab) { - memcpy(&server->session_key.data, - &ses->auth_key.data, ses->auth_key.len); + server->session_key.response = ses->auth_key.response; server->session_key.len = ses->auth_key.len; - ses->server->session_estab = true; + server->sequence_number = 0x2; + server->session_estab = true; + ses->auth_key.response = NULL; } mutex_unlock(&server->srv_mutex); @@ -3192,6 +3174,12 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, spin_unlock(&GlobalMid_Lock); } + kfree(ses->auth_key.response); + ses->auth_key.response = NULL; + ses->auth_key.len = 0; + kfree(ses->ntlmssp); + ses->ntlmssp = NULL; + return rc; } @@ -3250,22 +3238,10 @@ out: return tcon; } -static struct tcon_link * +static inline struct tcon_link * cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) { - struct tcon_link *tlink; - unsigned int ret; - - spin_lock(&cifs_sb->tlink_tree_lock); - ret = radix_tree_gang_lookup_tag(&cifs_sb->tlink_tree, (void **)&tlink, - 0, 1, CIFS_TLINK_MASTER_TAG); - spin_unlock(&cifs_sb->tlink_tree_lock); - - /* the master tcon should always be present */ - if (ret == 0) - BUG(); - - return tlink; + return cifs_sb->master_tlink; } struct cifsTconInfo * @@ -3281,6 +3257,47 @@ cifs_sb_tcon_pending_wait(void *unused) return signal_pending(current) ? -ERESTARTSYS : 0; } +/* find and return a tlink with given uid */ +static struct tcon_link * +tlink_rb_search(struct rb_root *root, uid_t uid) +{ + struct rb_node *node = root->rb_node; + struct tcon_link *tlink; + + while (node) { + tlink = rb_entry(node, struct tcon_link, tl_rbnode); + + if (tlink->tl_uid > uid) + node = node->rb_left; + else if (tlink->tl_uid < uid) + node = node->rb_right; + else + return tlink; + } + return NULL; +} + +/* insert a tcon_link into the tree */ +static void +tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) +{ + struct rb_node **new = &(root->rb_node), *parent = NULL; + struct tcon_link *tlink; + + while (*new) { + tlink = rb_entry(*new, struct tcon_link, tl_rbnode); + parent = *new; + + if (tlink->tl_uid > new_tlink->tl_uid) + new = &((*new)->rb_left); + else + new = &((*new)->rb_right); + } + + rb_link_node(&new_tlink->tl_rbnode, parent, new); + rb_insert_color(&new_tlink->tl_rbnode, root); +} + /* * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the * current task. @@ -3288,7 +3305,7 @@ cifs_sb_tcon_pending_wait(void *unused) * If the superblock doesn't refer to a multiuser mount, then just return * the master tcon for the mount. * - * First, search the radix tree for an existing tcon for this fsuid. If one + * First, search the rbtree for an existing tcon for this fsuid. If one * exists, then check to see if it's pending construction. If it is then wait * for construction to complete. Once it's no longer pending, check to see if * it failed and either return an error or retry construction, depending on @@ -3301,14 +3318,14 @@ struct tcon_link * cifs_sb_tlink(struct cifs_sb_info *cifs_sb) { int ret; - unsigned long fsuid = (unsigned long) current_fsuid(); + uid_t fsuid = current_fsuid(); struct tcon_link *tlink, *newtlink; if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); spin_lock(&cifs_sb->tlink_tree_lock); - tlink = radix_tree_lookup(&cifs_sb->tlink_tree, fsuid); + tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); if (tlink) cifs_get_tlink(tlink); spin_unlock(&cifs_sb->tlink_tree_lock); @@ -3317,36 +3334,24 @@ cifs_sb_tlink(struct cifs_sb_info *cifs_sb) newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); if (newtlink == NULL) return ERR_PTR(-ENOMEM); - newtlink->tl_index = fsuid; + newtlink->tl_uid = fsuid; newtlink->tl_tcon = ERR_PTR(-EACCES); set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); cifs_get_tlink(newtlink); - ret = radix_tree_preload(GFP_KERNEL); - if (ret != 0) { - kfree(newtlink); - return ERR_PTR(ret); - } - spin_lock(&cifs_sb->tlink_tree_lock); /* was one inserted after previous search? */ - tlink = radix_tree_lookup(&cifs_sb->tlink_tree, fsuid); + tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); if (tlink) { cifs_get_tlink(tlink); spin_unlock(&cifs_sb->tlink_tree_lock); - radix_tree_preload_end(); kfree(newtlink); goto wait_for_construction; } - ret = radix_tree_insert(&cifs_sb->tlink_tree, fsuid, newtlink); - spin_unlock(&cifs_sb->tlink_tree_lock); - radix_tree_preload_end(); - if (ret) { - kfree(newtlink); - return ERR_PTR(ret); - } tlink = newtlink; + tlink_rb_insert(&cifs_sb->tlink_tree, tlink); + spin_unlock(&cifs_sb->tlink_tree_lock); } else { wait_for_construction: ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, @@ -3392,39 +3397,39 @@ cifs_prune_tlinks(struct work_struct *work) { struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, prune_tlinks.work); - struct tcon_link *tlink[8]; - unsigned long now = jiffies; - unsigned long index = 0; - int i, ret; + struct rb_root *root = &cifs_sb->tlink_tree; + struct rb_node *node = rb_first(root); + struct rb_node *tmp; + struct tcon_link *tlink; - do { - spin_lock(&cifs_sb->tlink_tree_lock); - ret = radix_tree_gang_lookup(&cifs_sb->tlink_tree, - (void **)tlink, index, - ARRAY_SIZE(tlink)); - /* increment index for next pass */ - if (ret > 0) - index = tlink[ret - 1]->tl_index + 1; - for (i = 0; i < ret; i++) { - if (test_bit(TCON_LINK_MASTER, &tlink[i]->tl_flags) || - atomic_read(&tlink[i]->tl_count) != 0 || - time_after(tlink[i]->tl_time + TLINK_IDLE_EXPIRE, - now)) { - tlink[i] = NULL; - continue; - } - cifs_get_tlink(tlink[i]); - clear_bit(TCON_LINK_IN_TREE, &tlink[i]->tl_flags); - radix_tree_delete(&cifs_sb->tlink_tree, - tlink[i]->tl_index); - } - spin_unlock(&cifs_sb->tlink_tree_lock); + /* + * Because we drop the spinlock in the loop in order to put the tlink + * it's not guarded against removal of links from the tree. The only + * places that remove entries from the tree are this function and + * umounts. Because this function is non-reentrant and is canceled + * before umount can proceed, this is safe. + */ + spin_lock(&cifs_sb->tlink_tree_lock); + node = rb_first(root); + while (node != NULL) { + tmp = node; + node = rb_next(tmp); + tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); + + if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || + atomic_read(&tlink->tl_count) != 0 || + time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) + continue; - for (i = 0; i < ret; i++) { - if (tlink[i] != NULL) - cifs_put_tlink(tlink[i]); - } - } while (ret != 0); + cifs_get_tlink(tlink); + clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); + rb_erase(tmp, root); + + spin_unlock(&cifs_sb->tlink_tree_lock); + cifs_put_tlink(tlink); + spin_lock(&cifs_sb->tlink_tree_lock); + } + spin_unlock(&cifs_sb->tlink_tree_lock); queue_delayed_work(system_nrt_wq, &cifs_sb->prune_tlinks, TLINK_IDLE_EXPIRE); diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 3840edd..2e77382 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -135,9 +135,9 @@ static void setup_cifs_dentry(struct cifsTconInfo *tcon, struct inode *newinode) { if (tcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); d_instantiate(direntry, newinode); } @@ -293,10 +293,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, args.uid = NO_CHANGE_64; args.gid = NO_CHANGE_64; } - CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); + CIFSSMBUnixSetFileInfo(xid, tcon, &args, fileHandle, + current->tgid); } else { /* BB implement mode setting via Windows security descriptors e.g. */ @@ -421,9 +419,9 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, xid); if (pTcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); if (rc == 0) d_instantiate(direntry, newinode); @@ -604,9 +602,9 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, if ((rc == 0) && (newInode != NULL)) { if (pTcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); d_add(direntry, newInode); if (posix_open) { filp = lookup_instantiate_filp(nd, direntry, @@ -634,9 +632,9 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, rc = 0; direntry->d_time = jiffies; if (pTcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); d_add(direntry, NULL); /* if it was once a directory (but how can we tell?) we could do shrink_dcache_parent(direntry); */ @@ -656,22 +654,37 @@ lookup_out: static int cifs_d_revalidate(struct dentry *direntry, struct nameidata *nd) { - int isValid = 1; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; if (direntry->d_inode) { if (cifs_revalidate_dentry(direntry)) return 0; - } else { - cFYI(1, "neg dentry 0x%p name = %s", - direntry, direntry->d_name.name); - if (time_after(jiffies, direntry->d_time + HZ) || - !lookupCacheEnabled) { - d_drop(direntry); - isValid = 0; - } + else + return 1; + } + + /* + * This may be nfsd (or something), anyway, we can't see the + * intent of this. So, since this can be for creation, drop it. + */ + if (!nd) + return 0; + + /* + * Drop the negative dentry, in order to make sure to use the + * case sensitive name which is specified by user if this is + * for creation. + */ + if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) { + if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) + return 0; } - return isValid; + if (time_after(jiffies, direntry->d_time + HZ) || !lookupCacheEnabled) + return 0; + + return 1; } /* static int cifs_d_delete(struct dentry *direntry) @@ -688,9 +701,10 @@ const struct dentry_operations cifs_dentry_ops = { /* d_delete: cifs_d_delete, */ /* not needed except for debugging */ }; -static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) +static int cifs_ci_hash(const struct dentry *dentry, const struct inode *inode, + struct qstr *q) { - struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; + struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls; unsigned long hash; int i; @@ -703,21 +717,16 @@ static int cifs_ci_hash(struct dentry *dentry, struct qstr *q) return 0; } -static int cifs_ci_compare(struct dentry *dentry, struct qstr *a, - struct qstr *b) +static int cifs_ci_compare(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls; - - if ((a->len == b->len) && - (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) { - /* - * To preserve case, don't let an existing negative dentry's - * case take precedence. If a is not a negative dentry, this - * should have no side effects - */ - memcpy((void *)a->name, b->name, a->len); + struct nls_table *codepage = CIFS_SB(pinode->i_sb)->local_nls; + + if ((name->len == len) && + (nls_strnicmp(codepage, name->name, str, len) == 0)) return 0; - } return 1; } diff --git a/fs/cifs/dns_resolve.c b/fs/cifs/dns_resolve.c index 0eb8702..548f062 100644 --- a/fs/cifs/dns_resolve.c +++ b/fs/cifs/dns_resolve.c @@ -66,7 +66,7 @@ dns_resolve_server_name_to_ip(const char *unc, char **ip_addr) /* Search for server name delimiter */ sep = memchr(hostname, '\\', len); if (sep) - len = sep - unc; + len = sep - hostname; else cFYI(1, "%s: probably server name is whole unc: %s", __func__, unc); diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 45af003..d843631 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -104,59 +104,6 @@ static inline int cifs_get_disposition(unsigned int flags) return FILE_OPEN; } -static inline int cifs_open_inode_helper(struct inode *inode, - struct cifsTconInfo *pTcon, __u32 oplock, FILE_ALL_INFO *buf, - char *full_path, int xid) -{ - struct cifsInodeInfo *pCifsInode = CIFS_I(inode); - struct timespec temp; - int rc; - - if (pCifsInode->clientCanCacheRead) { - /* we have the inode open somewhere else - no need to discard cache data */ - goto client_can_cache; - } - - /* BB need same check in cifs_create too? */ - /* if not oplocked, invalidate inode pages if mtime or file - size changed */ - temp = cifs_NTtimeToUnix(buf->LastWriteTime); - if (timespec_equal(&inode->i_mtime, &temp) && - (inode->i_size == - (loff_t)le64_to_cpu(buf->EndOfFile))) { - cFYI(1, "inode unchanged on server"); - } else { - if (inode->i_mapping) { - /* BB no need to lock inode until after invalidate - since namei code should already have it locked? */ - rc = filemap_write_and_wait(inode->i_mapping); - if (rc != 0) - pCifsInode->write_behind_rc = rc; - } - cFYI(1, "invalidating remote inode since open detected it " - "changed"); - invalidate_remote_inode(inode); - } - -client_can_cache: - if (pTcon->unix_ext) - rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb, - xid); - else - rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb, - xid, NULL); - - if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { - pCifsInode->clientCanCacheAll = true; - pCifsInode->clientCanCacheRead = true; - cFYI(1, "Exclusive Oplock granted on inode %p", inode); - } else if ((oplock & 0xF) == OPLOCK_READ) - pCifsInode->clientCanCacheRead = true; - - return rc; -} - int cifs_posix_open(char *full_path, struct inode **pinode, struct super_block *sb, int mode, unsigned int f_flags, __u32 *poplock, __u16 *pnetfid, int xid) @@ -219,6 +166,76 @@ posix_open_ret: return rc; } +static int +cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, + struct cifsTconInfo *tcon, unsigned int f_flags, __u32 *poplock, + __u16 *pnetfid, int xid) +{ + int rc; + int desiredAccess; + int disposition; + FILE_ALL_INFO *buf; + + desiredAccess = cifs_convert_flags(f_flags); + +/********************************************************************* + * open flag mapping table: + * + * POSIX Flag CIFS Disposition + * ---------- ---------------- + * O_CREAT FILE_OPEN_IF + * O_CREAT | O_EXCL FILE_CREATE + * O_CREAT | O_TRUNC FILE_OVERWRITE_IF + * O_TRUNC FILE_OVERWRITE + * none of the above FILE_OPEN + * + * Note that there is not a direct match between disposition + * FILE_SUPERSEDE (ie create whether or not file exists although + * O_CREAT | O_TRUNC is similar but truncates the existing + * file rather than creating a new file as FILE_SUPERSEDE does + * (which uses the attributes / metadata passed in on open call) + *? + *? O_SYNC is a reasonable match to CIFS writethrough flag + *? and the read write flags match reasonably. O_LARGEFILE + *? is irrelevant because largefile support is always used + *? by this client. Flags O_APPEND, O_DIRECT, O_DIRECTORY, + * O_FASYNC, O_NOFOLLOW, O_NONBLOCK need further investigation + *********************************************************************/ + + disposition = cifs_get_disposition(f_flags); + + /* BB pass O_SYNC flag through on file attributes .. BB */ + + buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + if (tcon->ses->capabilities & CAP_NT_SMBS) + rc = CIFSSMBOpen(xid, tcon, full_path, disposition, + desiredAccess, CREATE_NOT_DIR, pnetfid, poplock, buf, + cifs_sb->local_nls, cifs_sb->mnt_cifs_flags + & CIFS_MOUNT_MAP_SPECIAL_CHR); + else + rc = SMBLegacyOpen(xid, tcon, full_path, disposition, + desiredAccess, CREATE_NOT_DIR, pnetfid, poplock, buf, + cifs_sb->local_nls, cifs_sb->mnt_cifs_flags + & CIFS_MOUNT_MAP_SPECIAL_CHR); + + if (rc) + goto out; + + if (tcon->unix_ext) + rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb, + xid); + else + rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb, + xid, pnetfid); + +out: + kfree(buf); + return rc; +} + struct cifsFileInfo * cifs_new_fileinfo(__u16 fileHandle, struct file *file, struct tcon_link *tlink, __u32 oplock) @@ -232,6 +249,7 @@ cifs_new_fileinfo(__u16 fileHandle, struct file *file, if (pCifsFile == NULL) return pCifsFile; + pCifsFile->count = 1; pCifsFile->netfid = fileHandle; pCifsFile->pid = current->tgid; pCifsFile->uid = current_fsuid(); @@ -242,7 +260,6 @@ cifs_new_fileinfo(__u16 fileHandle, struct file *file, mutex_init(&pCifsFile->fh_mutex); mutex_init(&pCifsFile->lock_mutex); INIT_LIST_HEAD(&pCifsFile->llist); - atomic_set(&pCifsFile->count, 1); INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break); spin_lock(&cifs_file_list_lock); @@ -254,12 +271,7 @@ cifs_new_fileinfo(__u16 fileHandle, struct file *file, list_add_tail(&pCifsFile->flist, &pCifsInode->openFileList); spin_unlock(&cifs_file_list_lock); - if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { - pCifsInode->clientCanCacheAll = true; - pCifsInode->clientCanCacheRead = true; - cFYI(1, "Exclusive Oplock inode %p", inode); - } else if ((oplock & 0xF) == OPLOCK_READ) - pCifsInode->clientCanCacheRead = true; + cifs_set_oplock_level(pCifsInode, oplock); file->private_data = pCifsFile; return pCifsFile; @@ -267,16 +279,18 @@ cifs_new_fileinfo(__u16 fileHandle, struct file *file, /* * Release a reference on the file private data. This may involve closing - * the filehandle out on the server. + * the filehandle out on the server. Must be called without holding + * cifs_file_list_lock. */ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) { + struct inode *inode = cifs_file->dentry->d_inode; struct cifsTconInfo *tcon = tlink_tcon(cifs_file->tlink); - struct cifsInodeInfo *cifsi = CIFS_I(cifs_file->dentry->d_inode); + struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifsLockInfo *li, *tmp; spin_lock(&cifs_file_list_lock); - if (!atomic_dec_and_test(&cifs_file->count)) { + if (--cifs_file->count > 0) { spin_unlock(&cifs_file_list_lock); return; } @@ -288,8 +302,7 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) if (list_empty(&cifsi->openFileList)) { cFYI(1, "closing last open instance for inode %p", cifs_file->dentry->d_inode); - cifsi->clientCanCacheRead = false; - cifsi->clientCanCacheAll = false; + cifs_set_oplock_level(cifsi, 0); } spin_unlock(&cifs_file_list_lock); @@ -327,10 +340,8 @@ int cifs_open(struct inode *inode, struct file *file) struct cifsFileInfo *pCifsFile = NULL; struct cifsInodeInfo *pCifsInode; char *full_path = NULL; - int desiredAccess; - int disposition; + bool posix_open_ok = false; __u16 netfid; - FILE_ALL_INFO *buf = NULL; xid = GetXid(); @@ -368,17 +379,7 @@ int cifs_open(struct inode *inode, struct file *file) file->f_flags, &oplock, &netfid, xid); if (rc == 0) { cFYI(1, "posix open succeeded"); - - pCifsFile = cifs_new_fileinfo(netfid, file, tlink, - oplock); - if (pCifsFile == NULL) { - CIFSSMBClose(xid, tcon, netfid); - rc = -ENOMEM; - } - - cifs_fscache_set_inode_cookie(inode, file); - - goto out; + posix_open_ok = true; } else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { if (tcon->ses->serverNOS) cERROR(1, "server %s of type %s returned" @@ -395,103 +396,39 @@ int cifs_open(struct inode *inode, struct file *file) or DFS errors */ } - desiredAccess = cifs_convert_flags(file->f_flags); - -/********************************************************************* - * open flag mapping table: - * - * POSIX Flag CIFS Disposition - * ---------- ---------------- - * O_CREAT FILE_OPEN_IF - * O_CREAT | O_EXCL FILE_CREATE - * O_CREAT | O_TRUNC FILE_OVERWRITE_IF - * O_TRUNC FILE_OVERWRITE - * none of the above FILE_OPEN - * - * Note that there is not a direct match between disposition - * FILE_SUPERSEDE (ie create whether or not file exists although - * O_CREAT | O_TRUNC is similar but truncates the existing - * file rather than creating a new file as FILE_SUPERSEDE does - * (which uses the attributes / metadata passed in on open call) - *? - *? O_SYNC is a reasonable match to CIFS writethrough flag - *? and the read write flags match reasonably. O_LARGEFILE - *? is irrelevant because largefile support is always used - *? by this client. Flags O_APPEND, O_DIRECT, O_DIRECTORY, - * O_FASYNC, O_NOFOLLOW, O_NONBLOCK need further investigation - *********************************************************************/ - - disposition = cifs_get_disposition(file->f_flags); - - /* BB pass O_SYNC flag through on file attributes .. BB */ - - /* Also refresh inode by passing in file_info buf returned by SMBOpen - and calling get_inode_info with returned buf (at least helps - non-Unix server case) */ - - /* BB we can not do this if this is the second open of a file - and the first handle has writebehind data, we might be - able to simply do a filemap_fdatawrite/filemap_fdatawait first */ - buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); - if (!buf) { - rc = -ENOMEM; - goto out; - } - - if (tcon->ses->capabilities & CAP_NT_SMBS) - rc = CIFSSMBOpen(xid, tcon, full_path, disposition, - desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); - else - rc = -EIO; /* no NT SMB support fall into legacy open below */ - - if (rc == -EIO) { - /* Old server, try legacy style OpenX */ - rc = SMBLegacyOpen(xid, tcon, full_path, disposition, - desiredAccess, CREATE_NOT_DIR, &netfid, &oplock, buf, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); - } - if (rc) { - cFYI(1, "cifs_open returned 0x%x", rc); - goto out; + if (!posix_open_ok) { + rc = cifs_nt_open(full_path, inode, cifs_sb, tcon, + file->f_flags, &oplock, &netfid, xid); + if (rc) + goto out; } - rc = cifs_open_inode_helper(inode, tcon, oplock, buf, full_path, xid); - if (rc != 0) - goto out; - pCifsFile = cifs_new_fileinfo(netfid, file, tlink, oplock); if (pCifsFile == NULL) { + CIFSSMBClose(xid, tcon, netfid); rc = -ENOMEM; goto out; } cifs_fscache_set_inode_cookie(inode, file); - if (oplock & CIFS_CREATE_ACTION) { + if ((oplock & CIFS_CREATE_ACTION) && !posix_open_ok && tcon->unix_ext) { /* time to set mode which we can not set earlier due to problems creating new read-only files */ - if (tcon->unix_ext) { - struct cifs_unix_set_info_args args = { - .mode = inode->i_mode, - .uid = NO_CHANGE_64, - .gid = NO_CHANGE_64, - .ctime = NO_CHANGE_64, - .atime = NO_CHANGE_64, - .mtime = NO_CHANGE_64, - .device = 0, - }; - CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, - cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - } + struct cifs_unix_set_info_args args = { + .mode = inode->i_mode, + .uid = NO_CHANGE_64, + .gid = NO_CHANGE_64, + .ctime = NO_CHANGE_64, + .atime = NO_CHANGE_64, + .mtime = NO_CHANGE_64, + .device = 0, + }; + CIFSSMBUnixSetFileInfo(xid, tcon, &args, netfid, + pCifsFile->pid); } out: - kfree(buf); kfree(full_path); FreeXid(xid); cifs_put_tlink(tlink); @@ -605,11 +542,8 @@ reopen_success: if (can_flush) { rc = filemap_write_and_wait(inode->i_mapping); - if (rc != 0) - CIFS_I(inode)->write_behind_rc = rc; + mapping_set_error(inode->i_mapping, rc); - pCifsInode->clientCanCacheAll = false; - pCifsInode->clientCanCacheRead = false; if (tcon->unix_ext) rc = cifs_get_inode_info_unix(&inode, full_path, inode->i_sb, xid); @@ -623,18 +557,9 @@ reopen_success: invalidate the current end of file on the server we can not go to the server to get the new inod info */ - if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) { - pCifsInode->clientCanCacheAll = true; - pCifsInode->clientCanCacheRead = true; - cFYI(1, "Exclusive Oplock granted on inode %p", - pCifsFile->dentry->d_inode); - } else if ((oplock & 0xF) == OPLOCK_READ) { - pCifsInode->clientCanCacheRead = true; - pCifsInode->clientCanCacheAll = false; - } else { - pCifsInode->clientCanCacheRead = false; - pCifsInode->clientCanCacheAll = false; - } + + cifs_set_oplock_level(pCifsInode, oplock); + cifs_relock_file(pCifsFile); reopen_error_exit: @@ -776,12 +701,6 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock) cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); tcon = tlink_tcon(((struct cifsFileInfo *)file->private_data)->tlink); - - if (file->private_data == NULL) { - rc = -EBADF; - FreeXid(xid); - return rc; - } netfid = ((struct cifsFileInfo *)file->private_data)->netfid; if ((tcon->ses->capabilities & CAP_UNIX) && @@ -957,6 +876,7 @@ cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, ssize_t cifs_user_write(struct file *file, const char __user *write_data, size_t write_size, loff_t *poffset) { + struct inode *inode = file->f_path.dentry->d_inode; int rc = 0; unsigned int bytes_written = 0; unsigned int total_written; @@ -964,7 +884,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data, struct cifsTconInfo *pTcon; int xid, long_op; struct cifsFileInfo *open_file; - struct cifsInodeInfo *cifsi = CIFS_I(file->f_path.dentry->d_inode); + struct cifsInodeInfo *cifsi = CIFS_I(inode); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); @@ -1030,21 +950,17 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data, cifs_stats_bytes_written(pTcon, total_written); - /* since the write may have blocked check these pointers again */ - if ((file->f_path.dentry) && (file->f_path.dentry->d_inode)) { - struct inode *inode = file->f_path.dentry->d_inode; /* Do not update local mtime - server will set its actual value on write - * inode->i_ctime = inode->i_mtime = - * current_fs_time(inode->i_sb);*/ - if (total_written > 0) { - spin_lock(&inode->i_lock); - if (*poffset > file->f_path.dentry->d_inode->i_size) - i_size_write(file->f_path.dentry->d_inode, - *poffset); - spin_unlock(&inode->i_lock); - } - mark_inode_dirty_sync(file->f_path.dentry->d_inode); + * inode->i_ctime = inode->i_mtime = + * current_fs_time(inode->i_sb);*/ + if (total_written > 0) { + spin_lock(&inode->i_lock); + if (*poffset > inode->i_size) + i_size_write(inode, *poffset); + spin_unlock(&inode->i_lock); } + mark_inode_dirty_sync(inode); + FreeXid(xid); return total_written; } @@ -1139,7 +1055,6 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file, return total_written; } -#ifdef CONFIG_CIFS_EXPERIMENTAL struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only) { @@ -1173,13 +1088,12 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode, spin_unlock(&cifs_file_list_lock); return NULL; } -#endif struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only) { struct cifsFileInfo *open_file; - struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_inode->vfs_inode.i_sb); + struct cifs_sb_info *cifs_sb; bool any_available = false; int rc; @@ -1193,6 +1107,8 @@ struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode, return NULL; } + cifs_sb = CIFS_SB(cifs_inode->vfs_inode.i_sb); + /* only filter by fsuid on multiuser mounts */ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) fsuid_only = false; @@ -1353,6 +1269,7 @@ static int cifs_writepages(struct address_space *mapping, if (!experimEnabled && tcon->ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { cifsFileInfo_put(open_file); + kfree(iov); return generic_writepages(mapping, wbc); } cifsFileInfo_put(open_file); @@ -1478,12 +1395,7 @@ retry: if (rc || bytes_written < bytes_to_write) { cERROR(1, "Write2 ret %d, wrote %d", rc, bytes_written); - /* BB what if continued retry is - requested via mount flags? */ - if (rc == -ENOSPC) - set_bit(AS_ENOSPC, &mapping->flags); - else - set_bit(AS_EIO, &mapping->flags); + mapping_set_error(mapping, rc); } else { cifs_stats_bytes_written(tcon, bytes_written); } @@ -1628,11 +1540,10 @@ int cifs_fsync(struct file *file, int datasync) rc = filemap_write_and_wait(inode->i_mapping); if (rc == 0) { - rc = CIFS_I(inode)->write_behind_rc; - CIFS_I(inode)->write_behind_rc = 0; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + tcon = tlink_tcon(smbfile->tlink); - if (!rc && tcon && smbfile && - !(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); } @@ -1677,21 +1588,8 @@ int cifs_flush(struct file *file, fl_owner_t id) struct inode *inode = file->f_path.dentry->d_inode; int rc = 0; - /* Rather than do the steps manually: - lock the inode for writing - loop through pages looking for write behind data (dirty pages) - coalesce into contiguous 16K (or smaller) chunks to write to server - send to server (prefer in parallel) - deal with writebehind errors - unlock inode for writing - filemapfdatawrite appears easier for the time being */ - - rc = filemap_fdatawrite(inode->i_mapping); - /* reset wb rc if we were able to write out dirty pages */ - if (!rc) { - rc = CIFS_I(inode)->write_behind_rc; - CIFS_I(inode)->write_behind_rc = 0; - } + if (file->f_mode & FMODE_WRITE) + rc = filemap_write_and_wait(inode->i_mapping); cFYI(1, "Flush inode %p file %p rc %d", inode, file, rc); @@ -2270,7 +2168,7 @@ void cifs_oplock_break(struct work_struct *work) oplock_break); struct inode *inode = cfile->dentry->d_inode; struct cifsInodeInfo *cinode = CIFS_I(inode); - int rc, waitrc = 0; + int rc = 0; if (inode && S_ISREG(inode->i_mode)) { if (cinode->clientCanCacheRead) @@ -2279,13 +2177,10 @@ void cifs_oplock_break(struct work_struct *work) break_lease(inode, O_WRONLY); rc = filemap_fdatawrite(inode->i_mapping); if (cinode->clientCanCacheRead == 0) { - waitrc = filemap_fdatawait(inode->i_mapping); + rc = filemap_fdatawait(inode->i_mapping); + mapping_set_error(inode->i_mapping, rc); invalidate_remote_inode(inode); } - if (!rc) - rc = waitrc; - if (rc) - cinode->write_behind_rc = rc; cFYI(1, "Oplock flush inode %p rc %d", inode, rc); } @@ -2304,7 +2199,7 @@ void cifs_oplock_break(struct work_struct *work) /* * We might have kicked in before is_valid_oplock_break() * finished grabbing reference for us. Make sure it's done by - * waiting for GlobalSMSSeslock. + * waiting for cifs_file_list_lock. */ spin_lock(&cifs_file_list_lock); spin_unlock(&cifs_file_list_lock); @@ -2312,6 +2207,7 @@ void cifs_oplock_break(struct work_struct *work) cifs_oplock_break_put(cfile); } +/* must be called while holding cifs_file_list_lock */ void cifs_oplock_break_get(struct cifsFileInfo *cfile) { cifs_sb_active(cfile->dentry->d_sb); @@ -2320,8 +2216,10 @@ void cifs_oplock_break_get(struct cifsFileInfo *cfile) void cifs_oplock_break_put(struct cifsFileInfo *cfile) { + struct super_block *sb = cfile->dentry->d_sb; + cifsFileInfo_put(cfile); - cifs_sb_deactive(cfile->dentry->d_sb); + cifs_sb_deactive(sb); } const struct address_space_operations cifs_addr_ops = { diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c index a2ad94e..297a43d 100644 --- a/fs/cifs/fscache.c +++ b/fs/cifs/fscache.c @@ -2,7 +2,7 @@ * fs/cifs/fscache.c - CIFS filesystem cache interface * * Copyright (c) 2010 Novell, Inc. - * Author(s): Suresh Jayaraman (sjayaraman@suse.de> + * Author(s): Suresh Jayaraman <sjayaraman@suse.de> * * This library is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published @@ -67,10 +67,12 @@ static void cifs_fscache_enable_inode_cookie(struct inode *inode) if (cifsi->fscache) return; - cifsi->fscache = fscache_acquire_cookie(tcon->fscache, + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) { + cifsi->fscache = fscache_acquire_cookie(tcon->fscache, &cifs_fscache_inode_object_def, cifsi); - cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)", tcon->fscache, + cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)", tcon->fscache, cifsi->fscache); + } } void cifs_fscache_release_inode_cookie(struct inode *inode) @@ -101,10 +103,8 @@ void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) { if ((filp->f_flags & O_ACCMODE) != O_RDONLY) cifs_fscache_disable_inode_cookie(inode); - else { + else cifs_fscache_enable_inode_cookie(inode); - cFYI(1, "CIFS: fscache inode cookie set"); - } } void cifs_fscache_reset_inode_cookie(struct inode *inode) diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 9497930..0c7e369 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -518,6 +518,7 @@ cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, fattr->cf_eof = le64_to_cpu(info->EndOfFile); fattr->cf_bytes = le64_to_cpu(info->AllocationSize); + fattr->cf_createtime = le64_to_cpu(info->CreationTime); if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; @@ -686,13 +687,18 @@ int cifs_get_inode_info(struct inode **pinode, cFYI(1, "cifs_sfu_type failed: %d", tmprc); } -#ifdef CONFIG_CIFS_EXPERIMENTAL +#ifdef CONFIG_CIFS_ACL /* fill in 0777 bits from ACL */ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { - cFYI(1, "Getting mode bits from ACL"); - cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); + rc = cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, + pfid); + if (rc) { + cFYI(1, "%s: Getting ACL failed with error: %d", + __func__, rc); + goto cgii_exit; + } } -#endif +#endif /* CONFIG_CIFS_ACL */ /* fill in remaining high mode bits e.g. SUID, VTX */ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) @@ -723,12 +729,12 @@ static const struct inode_operations cifs_ipc_inode_ops = { .lookup = cifs_lookup, }; -char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) +char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb, + struct cifsTconInfo *tcon) { int pplen = cifs_sb->prepathlen; int dfsplen; char *full_path = NULL; - struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); /* if no prefix path, simply set path to the root of share to "" */ if (pplen == 0) { @@ -774,6 +780,10 @@ cifs_find_inode(struct inode *inode, void *opaque) if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) return 0; + /* use createtime like an i_generation field */ + if (CIFS_I(inode)->createtime != fattr->cf_createtime) + return 0; + /* don't match inode of different type */ if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) return 0; @@ -791,6 +801,7 @@ cifs_init_inode(struct inode *inode, void *opaque) struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; + CIFS_I(inode)->createtime = fattr->cf_createtime; return 0; } @@ -804,14 +815,14 @@ inode_has_hashed_dentries(struct inode *inode) { struct dentry *dentry; - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); list_for_each_entry(dentry, &inode->i_dentry, d_alias) { if (!d_unhashed(dentry) || IS_ROOT(dentry)) { - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); return true; } } - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); return false; } @@ -870,7 +881,7 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) char *full_path; struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); - full_path = cifs_build_path_to_root(cifs_sb); + full_path = cifs_build_path_to_root(cifs_sb, tcon); if (full_path == NULL) return ERR_PTR(-ENOMEM); @@ -881,8 +892,10 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) rc = cifs_get_inode_info(&inode, full_path, NULL, sb, xid, NULL); - if (!inode) - return ERR_PTR(rc); + if (!inode) { + inode = ERR_PTR(rc); + goto out; + } #ifdef CONFIG_CIFS_FSCACHE /* populate tcon->resource_id */ @@ -898,13 +911,11 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) inode->i_uid = cifs_sb->mnt_uid; inode->i_gid = cifs_sb->mnt_gid; } else if (rc) { - kfree(full_path); - _FreeXid(xid); iget_failed(inode); - return ERR_PTR(rc); + inode = ERR_PTR(rc); } - +out: kfree(full_path); /* can not call macro FreeXid here since in a void func * TODO: This is no longer true @@ -1314,9 +1325,9 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) to set uid/gid */ inc_nlink(inode); if (pTcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); cifs_fill_uniqueid(inode->i_sb, &fattr); @@ -1358,9 +1369,9 @@ mkdir_get_info: inode->i_sb, xid, NULL); if (pTcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); d_instantiate(direntry, newinode); /* setting nlink not necessary except in cases where we * failed to get it from the server or was set bogus */ @@ -1648,6 +1659,7 @@ static bool cifs_inode_needs_reval(struct inode *inode) { struct cifsInodeInfo *cifs_i = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); if (cifs_i->clientCanCacheRead) return false; @@ -1658,19 +1670,21 @@ cifs_inode_needs_reval(struct inode *inode) if (cifs_i->time == 0) return true; - /* FIXME: the actimeo should be tunable */ - if (time_after_eq(jiffies, cifs_i->time + HZ)) + if (!time_in_range(jiffies, cifs_i->time, + cifs_i->time + cifs_sb->actimeo)) return true; /* hardlinked files w/ noserverino get "special" treatment */ - if (!(CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && S_ISREG(inode->i_mode) && inode->i_nlink != 1) return true; return false; } -/* check invalid_mapping flag and zap the cache if it's set */ +/* + * Zap the cache. Called when invalid_mapping flag is set. + */ static void cifs_invalidate_mapping(struct inode *inode) { @@ -1682,8 +1696,7 @@ cifs_invalidate_mapping(struct inode *inode) /* write back any cached data */ if (inode->i_mapping && inode->i_mapping->nrpages != 0) { rc = filemap_write_and_wait(inode->i_mapping); - if (rc) - cifs_i->write_behind_rc = rc; + mapping_set_error(inode->i_mapping, rc); } invalidate_remote_inode(inode); cifs_fscache_reset_inode_cookie(inode); @@ -1943,10 +1956,8 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) * the flush returns error? */ rc = filemap_write_and_wait(inode->i_mapping); - if (rc != 0) { - cifsInode->write_behind_rc = rc; - rc = 0; - } + mapping_set_error(inode->i_mapping, rc); + rc = 0; if (attrs->ia_valid & ATTR_SIZE) { rc = cifs_set_file_size(inode, attrs, xid, full_path); @@ -2087,10 +2098,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) * the flush returns error? */ rc = filemap_write_and_wait(inode->i_mapping); - if (rc != 0) { - cifsInode->write_behind_rc = rc; - rc = 0; - } + mapping_set_error(inode->i_mapping, rc); + rc = 0; if (attrs->ia_valid & ATTR_SIZE) { rc = cifs_set_file_size(inode, attrs, xid, full_path); @@ -2119,11 +2128,16 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) if (attrs->ia_valid & ATTR_MODE) { rc = 0; -#ifdef CONFIG_CIFS_EXPERIMENTAL - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) - rc = mode_to_acl(inode, full_path, mode); - else -#endif +#ifdef CONFIG_CIFS_ACL + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { + rc = mode_to_cifs_acl(inode, full_path, mode); + if (rc) { + cFYI(1, "%s: Setting ACL failed with error: %d", + __func__, rc); + goto cifs_setattr_exit; + } + } else +#endif /* CONFIG_CIFS_ACL */ if (((mode & S_IWUGO) == 0) && (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { @@ -2182,7 +2196,6 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) setattr_copy(inode, attrs); mark_inode_dirty(inode); - return 0; cifs_setattr_exit: kfree(full_path); diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 077bf75..0c98672 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -38,10 +38,10 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) struct cifs_sb_info *cifs_sb; #ifdef CONFIG_CIFS_POSIX struct cifsFileInfo *pSMBFile = filep->private_data; - struct cifsTconInfo *tcon = tlink_tcon(pSMBFile->tlink); + struct cifsTconInfo *tcon; __u64 ExtAttrBits = 0; __u64 ExtAttrMask = 0; - __u64 caps = le64_to_cpu(tcon->fsUnixInfo.Capability); + __u64 caps; #endif /* CONFIG_CIFS_POSIX */ xid = GetXid(); @@ -62,9 +62,11 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) break; #ifdef CONFIG_CIFS_POSIX case FS_IOC_GETFLAGS: + if (pSMBFile == NULL) + break; + tcon = tlink_tcon(pSMBFile->tlink); + caps = le64_to_cpu(tcon->fsUnixInfo.Capability); if (CIFS_UNIX_EXTATTR_CAP & caps) { - if (pSMBFile == NULL) - break; rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid, &ExtAttrBits, &ExtAttrMask); if (rc == 0) @@ -75,13 +77,15 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) break; case FS_IOC_SETFLAGS: + if (pSMBFile == NULL) + break; + tcon = tlink_tcon(pSMBFile->tlink); + caps = le64_to_cpu(tcon->fsUnixInfo.Capability); if (CIFS_UNIX_EXTATTR_CAP & caps) { if (get_user(ExtAttrBits, (int __user *)arg)) { rc = -EFAULT; break; } - if (pSMBFile == NULL) - break; /* rc= CIFSGetExtAttr(xid,tcon,pSMBFile->netfid, extAttrBits, &ExtAttrMask);*/ } diff --git a/fs/cifs/link.c b/fs/cifs/link.c index 85cdbf8..fe2f6a9 100644 --- a/fs/cifs/link.c +++ b/fs/cifs/link.c @@ -525,9 +525,9 @@ cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname) rc); } else { if (pTcon->nocase) - direntry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(direntry, &cifs_ci_dentry_ops); else - direntry->d_op = &cifs_dentry_ops; + d_set_d_op(direntry, &cifs_dentry_ops); d_instantiate(direntry, newinode); } } diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index 1c681f6..43f1028 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -569,15 +569,14 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv) cFYI(1, "file id match, oplock break"); pCifsInode = CIFS_I(netfile->dentry->d_inode); - pCifsInode->clientCanCacheAll = false; - if (pSMB->OplockLevel == 0) - pCifsInode->clientCanCacheRead = false; + cifs_set_oplock_level(pCifsInode, + pSMB->OplockLevel); /* * cifs_oplock_break_put() can't be called * from here. Get reference after queueing * succeeded. cifs_oplock_break() will - * synchronize using GlobalSMSSeslock. + * synchronize using cifs_file_list_lock. */ if (queue_work(system_nrt_wq, &netfile->oplock_break)) @@ -722,3 +721,23 @@ cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb) cifs_sb_master_tcon(cifs_sb)->treeName); } } + +void cifs_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock) +{ + oplock &= 0xF; + + if (oplock == OPLOCK_EXCLUSIVE) { + cinode->clientCanCacheAll = true; + cinode->clientCanCacheRead = true; + cFYI(1, "Exclusive Oplock granted on inode %p", + &cinode->vfs_inode); + } else if (oplock == OPLOCK_READ) { + cinode->clientCanCacheAll = false; + cinode->clientCanCacheRead = true; + cFYI(1, "Level II Oplock granted on inode %p", + &cinode->vfs_inode); + } else { + cinode->clientCanCacheAll = false; + cinode->clientCanCacheRead = false; + } +} diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index ef7bb7b..76b1b37 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -79,7 +79,7 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name, cFYI(1, "For %s", name->name); if (parent->d_op && parent->d_op->d_hash) - parent->d_op->d_hash(parent, name); + parent->d_op->d_hash(parent, parent->d_inode, name); else name->hash = full_name_hash(name->name, name->len); @@ -103,9 +103,9 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name, } if (cifs_sb_master_tcon(CIFS_SB(sb))->nocase) - dentry->d_op = &cifs_ci_dentry_ops; + d_set_d_op(dentry, &cifs_ci_dentry_ops); else - dentry->d_op = &cifs_dentry_ops; + d_set_d_op(dentry, &cifs_dentry_ops); alias = d_materialise_unique(dentry, inode); if (alias != NULL) { @@ -160,6 +160,7 @@ cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info, fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes); fattr->cf_eof = le64_to_cpu(info->EndOfFile); fattr->cf_bytes = le64_to_cpu(info->AllocationSize); + fattr->cf_createtime = le64_to_cpu(info->CreationTime); fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); @@ -226,26 +227,29 @@ static int initiate_cifs_search(const int xid, struct file *file) char *full_path = NULL; struct cifsFileInfo *cifsFile; struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); - struct tcon_link *tlink; + struct tcon_link *tlink = NULL; struct cifsTconInfo *pTcon; - tlink = cifs_sb_tlink(cifs_sb); - if (IS_ERR(tlink)) - return PTR_ERR(tlink); - pTcon = tlink_tcon(tlink); - - if (file->private_data == NULL) - file->private_data = - kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); if (file->private_data == NULL) { - rc = -ENOMEM; - goto error_exit; + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + + cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); + if (cifsFile == NULL) { + rc = -ENOMEM; + goto error_exit; + } + file->private_data = cifsFile; + cifsFile->tlink = cifs_get_tlink(tlink); + pTcon = tlink_tcon(tlink); + } else { + cifsFile = file->private_data; + pTcon = tlink_tcon(cifsFile->tlink); } - cifsFile = file->private_data; cifsFile->invalidHandle = true; cifsFile->srch_inf.endOfSearch = false; - cifsFile->tlink = cifs_get_tlink(tlink); full_path = build_path_from_dentry(file->f_path.dentry); if (full_path == NULL) { @@ -756,18 +760,6 @@ static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir, rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, ino, fattr.cf_dtype); - /* - * we can not return filldir errors to the caller since they are - * "normal" when the stat blocksize is too small - we return remapped - * error instead - * - * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above - * case already. Why should we be clobbering other errors from it? - */ - if (rc) { - cFYI(1, "filldir rc = %d", rc); - rc = -EOVERFLOW; - } dput(tmp_dentry); return rc; } diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 2a11efd..eb74648 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -32,9 +32,6 @@ #include <linux/slab.h> #include "cifs_spnego.h" -extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, - unsigned char *p24); - /* * Checks if this is the first smb session to be reconnected after * the socket has been reestablished (so we know whether to use vc 0). @@ -402,29 +399,27 @@ static int decode_ntlmssp_challenge(char *bcc_ptr, int blob_len, return -EINVAL; } - memcpy(ses->cryptKey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); + memcpy(ses->ntlmssp->cryptkey, pblob->Challenge, CIFS_CRYPTO_KEY_SIZE); /* BB we could decode pblob->NegotiateFlags; some may be useful */ /* In particular we can examine sign flags */ /* BB spec says that if AvId field of MsvAvTimestamp is populated then we must set the MIC field of the AUTHENTICATE_MESSAGE */ - + ses->ntlmssp->server_flags = le32_to_cpu(pblob->NegotiateFlags); tioffset = cpu_to_le16(pblob->TargetInfoArray.BufferOffset); tilen = cpu_to_le16(pblob->TargetInfoArray.Length); - ses->tilen = tilen; - if (ses->tilen) { - ses->tiblob = kmalloc(tilen, GFP_KERNEL); - if (!ses->tiblob) { + if (tilen) { + ses->auth_key.response = kmalloc(tilen, GFP_KERNEL); + if (!ses->auth_key.response) { cERROR(1, "Challenge target info allocation failure"); - ses->tilen = 0; return -ENOMEM; } - memcpy(ses->tiblob, bcc_ptr + tioffset, ses->tilen); + memcpy(ses->auth_key.response, bcc_ptr + tioffset, tilen); + ses->auth_key.len = tilen; } return 0; } -#ifdef CONFIG_CIFS_EXPERIMENTAL /* BB Move to ntlmssp.c eventually */ /* We do not malloc the blob, it is passed in pbuffer, because @@ -435,20 +430,23 @@ static void build_ntlmssp_negotiate_blob(unsigned char *pbuffer, NEGOTIATE_MESSAGE *sec_blob = (NEGOTIATE_MESSAGE *)pbuffer; __u32 flags; + memset(pbuffer, 0, sizeof(NEGOTIATE_MESSAGE)); memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); sec_blob->MessageType = NtLmNegotiate; /* BB is NTLMV2 session security format easier to use here? */ flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | - NTLMSSP_NEGOTIATE_NTLM; + NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; if (ses->server->secMode & - (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) + (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) { flags |= NTLMSSP_NEGOTIATE_SIGN; - if (ses->server->secMode & SECMODE_SIGN_REQUIRED) - flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; + if (!ses->server->session_estab) + flags |= NTLMSSP_NEGOTIATE_KEY_XCH | + NTLMSSP_NEGOTIATE_EXTENDED_SEC; + } - sec_blob->NegotiateFlags |= cpu_to_le32(flags); + sec_blob->NegotiateFlags = cpu_to_le32(flags); sec_blob->WorkstationName.BufferOffset = 0; sec_blob->WorkstationName.Length = 0; @@ -469,11 +467,9 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer, const struct nls_table *nls_cp) { int rc; - unsigned int size; AUTHENTICATE_MESSAGE *sec_blob = (AUTHENTICATE_MESSAGE *)pbuffer; __u32 flags; unsigned char *tmp; - struct ntlmv2_resp ntlmv2_response = {}; memcpy(sec_blob->Signature, NTLMSSP_SIGNATURE, 8); sec_blob->MessageType = NtLmAuthenticate; @@ -481,7 +477,7 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer, flags = NTLMSSP_NEGOTIATE_56 | NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_TARGET_INFO | NTLMSSP_NEGOTIATE_128 | NTLMSSP_NEGOTIATE_UNICODE | - NTLMSSP_NEGOTIATE_NTLM; + NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_EXTENDED_SEC; if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) flags |= NTLMSSP_NEGOTIATE_SIGN; @@ -489,7 +485,7 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer, flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN; tmp = pbuffer + sizeof(AUTHENTICATE_MESSAGE); - sec_blob->NegotiateFlags |= cpu_to_le32(flags); + sec_blob->NegotiateFlags = cpu_to_le32(flags); sec_blob->LmChallengeResponse.BufferOffset = cpu_to_le32(sizeof(AUTHENTICATE_MESSAGE)); @@ -497,25 +493,19 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer, sec_blob->LmChallengeResponse.MaximumLength = 0; sec_blob->NtChallengeResponse.BufferOffset = cpu_to_le32(tmp - pbuffer); - rc = setup_ntlmv2_rsp(ses, (char *)&ntlmv2_response, nls_cp); + rc = setup_ntlmv2_rsp(ses, nls_cp); if (rc) { cERROR(1, "Error %d during NTLMSSP authentication", rc); goto setup_ntlmv2_ret; } - size = sizeof(struct ntlmv2_resp); - memcpy(tmp, (char *)&ntlmv2_response, size); - tmp += size; - if (ses->tilen > 0) { - memcpy(tmp, ses->tiblob, ses->tilen); - tmp += ses->tilen; - } + memcpy(tmp, ses->auth_key.response + CIFS_SESS_KEY_SIZE, + ses->auth_key.len - CIFS_SESS_KEY_SIZE); + tmp += ses->auth_key.len - CIFS_SESS_KEY_SIZE; - sec_blob->NtChallengeResponse.Length = cpu_to_le16(size + ses->tilen); + sec_blob->NtChallengeResponse.Length = + cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); sec_blob->NtChallengeResponse.MaximumLength = - cpu_to_le16(size + ses->tilen); - kfree(ses->tiblob); - ses->tiblob = NULL; - ses->tilen = 0; + cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); if (ses->domainName == NULL) { sec_blob->DomainName.BufferOffset = cpu_to_le32(tmp - pbuffer); @@ -554,26 +544,26 @@ static int build_ntlmssp_auth_blob(unsigned char *pbuffer, sec_blob->WorkstationName.MaximumLength = 0; tmp += 2; - sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); - sec_blob->SessionKey.Length = 0; - sec_blob->SessionKey.MaximumLength = 0; + if (((ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_KEY_XCH) || + (ses->ntlmssp->server_flags & NTLMSSP_NEGOTIATE_EXTENDED_SEC)) + && !calc_seckey(ses)) { + memcpy(tmp, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE); + sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); + sec_blob->SessionKey.Length = cpu_to_le16(CIFS_CPHTXT_SIZE); + sec_blob->SessionKey.MaximumLength = + cpu_to_le16(CIFS_CPHTXT_SIZE); + tmp += CIFS_CPHTXT_SIZE; + } else { + sec_blob->SessionKey.BufferOffset = cpu_to_le32(tmp - pbuffer); + sec_blob->SessionKey.Length = 0; + sec_blob->SessionKey.MaximumLength = 0; + } setup_ntlmv2_ret: *buflen = tmp - pbuffer; return rc; } - -static void setup_ntlmssp_neg_req(SESSION_SETUP_ANDX *pSMB, - struct cifsSesInfo *ses) -{ - build_ntlmssp_negotiate_blob(&pSMB->req.SecurityBlob[0], ses); - pSMB->req.SecurityBlobLength = cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); - - return; -} -#endif - int CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, const struct nls_table *nls_cp) @@ -600,8 +590,16 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, return -EINVAL; type = ses->server->secType; - cFYI(1, "sess setup type %d", type); + if (type == RawNTLMSSP) { + /* if memory allocation is successful, caller of this function + * frees it. + */ + ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); + if (!ses->ntlmssp) + return -ENOMEM; + } + ssetup_ntlmssp_authenticate: if (phase == NtLmChallenge) phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ @@ -666,10 +664,14 @@ ssetup_ntlmssp_authenticate: /* no capabilities flags in old lanman negotiation */ pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); - /* BB calculate hash with password */ - /* and copy into bcc */ - calc_lanman_hash(ses->password, ses->cryptKey, + /* Calculate hash with password and copy into bcc_ptr. + * Encryption Key (stored as in cryptkey) gets used if the + * security mode bit in Negottiate Protocol response states + * to use challenge/response method (i.e. Password bit is 1). + */ + + calc_lanman_hash(ses->password, ses->server->cryptkey, ses->server->secMode & SECMODE_PW_ENCRYPT ? true : false, lnm_session_key); @@ -687,24 +689,27 @@ ssetup_ntlmssp_authenticate: ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); #endif } else if (type == NTLM) { - char ntlm_session_key[CIFS_SESS_KEY_SIZE]; - pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); pSMB->req_no_secext.CaseInsensitivePasswordLength = - cpu_to_le16(CIFS_SESS_KEY_SIZE); + cpu_to_le16(CIFS_AUTH_RESP_SIZE); pSMB->req_no_secext.CaseSensitivePasswordLength = - cpu_to_le16(CIFS_SESS_KEY_SIZE); + cpu_to_le16(CIFS_AUTH_RESP_SIZE); - /* calculate session key */ - SMBNTencrypt(ses->password, ses->cryptKey, ntlm_session_key); + /* calculate ntlm response and session key */ + rc = setup_ntlm_response(ses); + if (rc) { + cERROR(1, "Error %d during NTLM authentication", rc); + goto ssetup_exit; + } + + /* copy ntlm response */ + memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, + CIFS_AUTH_RESP_SIZE); + bcc_ptr += CIFS_AUTH_RESP_SIZE; + memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, + CIFS_AUTH_RESP_SIZE); + bcc_ptr += CIFS_AUTH_RESP_SIZE; - cifs_calculate_session_key(&ses->auth_key, - ntlm_session_key, ses->password); - /* copy session key */ - memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); - bcc_ptr += CIFS_SESS_KEY_SIZE; - memcpy(bcc_ptr, (char *)ntlm_session_key, CIFS_SESS_KEY_SIZE); - bcc_ptr += CIFS_SESS_KEY_SIZE; if (ses->capabilities & CAP_UNICODE) { /* unicode strings must be word aligned */ if (iov[0].iov_len % 2) { @@ -715,47 +720,26 @@ ssetup_ntlmssp_authenticate: } else ascii_ssetup_strings(&bcc_ptr, ses, nls_cp); } else if (type == NTLMv2) { - char *v2_sess_key = - kmalloc(sizeof(struct ntlmv2_resp), GFP_KERNEL); - - /* BB FIXME change all users of v2_sess_key to - struct ntlmv2_resp */ - - if (v2_sess_key == NULL) { - rc = -ENOMEM; - goto ssetup_exit; - } - pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities); /* LM2 password would be here if we supported it */ pSMB->req_no_secext.CaseInsensitivePasswordLength = 0; - /* cpu_to_le16(LM2_SESS_KEY_SIZE); */ - /* calculate session key */ - rc = setup_ntlmv2_rsp(ses, v2_sess_key, nls_cp); + /* calculate nlmv2 response and session key */ + rc = setup_ntlmv2_rsp(ses, nls_cp); if (rc) { cERROR(1, "Error %d during NTLMv2 authentication", rc); - kfree(v2_sess_key); goto ssetup_exit; } - memcpy(bcc_ptr, (char *)v2_sess_key, - sizeof(struct ntlmv2_resp)); - bcc_ptr += sizeof(struct ntlmv2_resp); - kfree(v2_sess_key); + memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE, + ses->auth_key.len - CIFS_SESS_KEY_SIZE); + bcc_ptr += ses->auth_key.len - CIFS_SESS_KEY_SIZE; + /* set case sensitive password length after tilen may get * assigned, tilen is 0 otherwise. */ pSMB->req_no_secext.CaseSensitivePasswordLength = - cpu_to_le16(sizeof(struct ntlmv2_resp) + ses->tilen); - if (ses->tilen > 0) { - memcpy(bcc_ptr, ses->tiblob, ses->tilen); - bcc_ptr += ses->tilen; - /* we never did allocate ses->domainName to free */ - kfree(ses->tiblob); - ses->tiblob = NULL; - ses->tilen = 0; - } + cpu_to_le16(ses->auth_key.len - CIFS_SESS_KEY_SIZE); if (ses->capabilities & CAP_UNICODE) { if (iov[0].iov_len % 2) { @@ -768,6 +752,7 @@ ssetup_ntlmssp_authenticate: } else if (type == Kerberos) { #ifdef CONFIG_CIFS_UPCALL struct cifs_spnego_msg *msg; + spnego_key = cifs_get_spnego_key(ses); if (IS_ERR(spnego_key)) { rc = PTR_ERR(spnego_key); @@ -785,16 +770,17 @@ ssetup_ntlmssp_authenticate: rc = -EKEYREJECTED; goto ssetup_exit; } - /* bail out if key is too long */ - if (msg->sesskey_len > - sizeof(ses->auth_key.data.krb5)) { - cERROR(1, "Kerberos signing key too long (%u bytes)", - msg->sesskey_len); - rc = -EOVERFLOW; + + ses->auth_key.response = kmalloc(msg->sesskey_len, GFP_KERNEL); + if (!ses->auth_key.response) { + cERROR(1, "Kerberos can't allocate (%u bytes) memory", + msg->sesskey_len); + rc = -ENOMEM; goto ssetup_exit; } + memcpy(ses->auth_key.response, msg->data, msg->sesskey_len); ses->auth_key.len = msg->sesskey_len; - memcpy(ses->auth_key.data.krb5, msg->data, msg->sesskey_len); + pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; capabilities |= CAP_EXTENDED_SECURITY; pSMB->req.Capabilities = cpu_to_le32(capabilities); @@ -818,71 +804,70 @@ ssetup_ntlmssp_authenticate: rc = -ENOSYS; goto ssetup_exit; #endif /* CONFIG_CIFS_UPCALL */ - } else { -#ifdef CONFIG_CIFS_EXPERIMENTAL - if (type == RawNTLMSSP) { - if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { - cERROR(1, "NTLMSSP requires Unicode support"); - rc = -ENOSYS; + } else if (type == RawNTLMSSP) { + if ((pSMB->req.hdr.Flags2 & SMBFLG2_UNICODE) == 0) { + cERROR(1, "NTLMSSP requires Unicode support"); + rc = -ENOSYS; + goto ssetup_exit; + } + + cFYI(1, "ntlmssp session setup phase %d", phase); + pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; + capabilities |= CAP_EXTENDED_SECURITY; + pSMB->req.Capabilities |= cpu_to_le32(capabilities); + switch(phase) { + case NtLmNegotiate: + build_ntlmssp_negotiate_blob( + pSMB->req.SecurityBlob, ses); + iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); + iov[1].iov_base = pSMB->req.SecurityBlob; + pSMB->req.SecurityBlobLength = + cpu_to_le16(sizeof(NEGOTIATE_MESSAGE)); + break; + case NtLmAuthenticate: + /* + * 5 is an empirical value, large enough to hold + * authenticate message plus max 10 of av paris, + * domain, user, workstation names, flags, etc. + */ + ntlmsspblob = kzalloc( + 5*sizeof(struct _AUTHENTICATE_MESSAGE), + GFP_KERNEL); + if (!ntlmsspblob) { + cERROR(1, "Can't allocate NTLMSSP blob"); + rc = -ENOMEM; goto ssetup_exit; } - cFYI(1, "ntlmssp session setup phase %d", phase); - pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC; - capabilities |= CAP_EXTENDED_SECURITY; - pSMB->req.Capabilities |= cpu_to_le32(capabilities); - if (phase == NtLmNegotiate) { - setup_ntlmssp_neg_req(pSMB, ses); - iov[1].iov_len = sizeof(NEGOTIATE_MESSAGE); - iov[1].iov_base = &pSMB->req.SecurityBlob[0]; - } else if (phase == NtLmAuthenticate) { - /* 5 is an empirical value, large enought to - * hold authenticate message, max 10 of - * av paris, doamin,user,workstation mames, - * flags etc.. - */ - ntlmsspblob = kmalloc( - 5*sizeof(struct _AUTHENTICATE_MESSAGE), - GFP_KERNEL); - if (!ntlmsspblob) { - cERROR(1, "Can't allocate NTLMSSP"); - rc = -ENOMEM; - goto ssetup_exit; - } - - rc = build_ntlmssp_auth_blob(ntlmsspblob, - &blob_len, ses, nls_cp); - if (rc) - goto ssetup_exit; - iov[1].iov_len = blob_len; - iov[1].iov_base = ntlmsspblob; - pSMB->req.SecurityBlobLength = - cpu_to_le16(blob_len); - /* Make sure that we tell the server that we - are using the uid that it just gave us back - on the response (challenge) */ - smb_buf->Uid = ses->Suid; - } else { - cERROR(1, "invalid phase %d", phase); - rc = -ENOSYS; + rc = build_ntlmssp_auth_blob(ntlmsspblob, + &blob_len, ses, nls_cp); + if (rc) goto ssetup_exit; - } - /* unicode strings must be word aligned */ - if ((iov[0].iov_len + iov[1].iov_len) % 2) { - *bcc_ptr = 0; - bcc_ptr++; - } - unicode_oslm_strings(&bcc_ptr, nls_cp); - } else { - cERROR(1, "secType %d not supported!", type); + iov[1].iov_len = blob_len; + iov[1].iov_base = ntlmsspblob; + pSMB->req.SecurityBlobLength = cpu_to_le16(blob_len); + /* + * Make sure that we tell the server that we are using + * the uid that it just gave us back on the response + * (challenge) + */ + smb_buf->Uid = ses->Suid; + break; + default: + cERROR(1, "invalid phase %d", phase); rc = -ENOSYS; goto ssetup_exit; } -#else + /* unicode strings must be word aligned */ + if ((iov[0].iov_len + iov[1].iov_len) % 2) { + *bcc_ptr = 0; + bcc_ptr++; + } + unicode_oslm_strings(&bcc_ptr, nls_cp); + } else { cERROR(1, "secType %d not supported!", type); rc = -ENOSYS; goto ssetup_exit; -#endif } iov[2].iov_base = str_area; @@ -897,8 +882,6 @@ ssetup_ntlmssp_authenticate: CIFS_STD_OP /* not long */ | CIFS_LOG_ERROR); /* SMB request buf freed in SendReceive2 */ - cFYI(1, "ssetup rc from sendrecv2 is %d", rc); - pSMB = (SESSION_SETUP_ANDX *)iov[0].iov_base; smb_buf = (struct smb_hdr *)iov[0].iov_base; diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index a66c91e..59ca81b 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -119,7 +119,7 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) if (ssocket == NULL) return -ENOTSOCK; /* BB eventually add reconnect code here */ - smb_msg.msg_name = (struct sockaddr *) &server->addr.sockAddr; + smb_msg.msg_name = (struct sockaddr *) &server->dstaddr; smb_msg.msg_namelen = sizeof(struct sockaddr); smb_msg.msg_control = NULL; smb_msg.msg_controllen = 0; @@ -543,7 +543,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))) { rc = cifs_verify_signature(midQ->resp_buf, - &ses->server->session_key, + ses->server, midQ->sequence_number+1); if (rc) { cERROR(1, "Unexpected SMB signature"); @@ -731,7 +731,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses, (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))) { rc = cifs_verify_signature(out_buf, - &ses->server->session_key, + ses->server, midQ->sequence_number+1); if (rc) { cERROR(1, "Unexpected SMB signature"); @@ -981,7 +981,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon, (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))) { rc = cifs_verify_signature(out_buf, - &ses->server->session_key, + ses->server, midQ->sequence_number+1); if (rc) { cERROR(1, "Unexpected SMB signature"); diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index a264b74..eae2a14 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -30,10 +30,11 @@ #define MAX_EA_VALUE_SIZE 65535 #define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib" +#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" #define CIFS_XATTR_USER_PREFIX "user." #define CIFS_XATTR_SYSTEM_PREFIX "system." #define CIFS_XATTR_OS2_PREFIX "os2." -#define CIFS_XATTR_SECURITY_PREFIX ".security" +#define CIFS_XATTR_SECURITY_PREFIX "security." #define CIFS_XATTR_TRUSTED_PREFIX "trusted." #define XATTR_TRUSTED_PREFIX_LEN 8 #define XATTR_SECURITY_PREFIX_LEN 9 @@ -277,29 +278,8 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); -#ifdef CONFIG_CIFS_EXPERIMENTAL - else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { - __u16 fid; - int oplock = 0; - struct cifs_ntsd *pacl = NULL; - __u32 buflen = 0; - if (experimEnabled) - rc = CIFSSMBOpen(xid, pTcon, full_path, - FILE_OPEN, GENERIC_READ, 0, &fid, - &oplock, NULL, cifs_sb->local_nls, - cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); - /* else rc is EOPNOTSUPP from above */ - - if (rc == 0) { - rc = CIFSSMBGetCIFSACL(xid, pTcon, fid, &pacl, - &buflen); - CIFSSMBClose(xid, pTcon, fid); - } - } -#endif /* EXPERIMENTAL */ #else - cFYI(1, "query POSIX ACL not supported yet"); + cFYI(1, "Query POSIX ACL not supported yet"); #endif /* CONFIG_CIFS_POSIX */ } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { @@ -311,8 +291,33 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); #else - cFYI(1, "query POSIX default ACL not supported yet"); -#endif + cFYI(1, "Query POSIX default ACL not supported yet"); +#endif /* CONFIG_CIFS_POSIX */ + } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL, + strlen(CIFS_XATTR_CIFS_ACL)) == 0) { +#ifdef CONFIG_CIFS_ACL + u32 acllen; + struct cifs_ntsd *pacl; + + pacl = get_cifs_acl(cifs_sb, direntry->d_inode, + full_path, &acllen); + if (IS_ERR(pacl)) { + rc = PTR_ERR(pacl); + cERROR(1, "%s: error %zd getting sec desc", + __func__, rc); + } else { + if (ea_value) { + if (acllen > buf_size) + acllen = -ERANGE; + else + memcpy(ea_value, pacl, acllen); + } + rc = acllen; + kfree(pacl); + } +#else + cFYI(1, "Query CIFS ACL not supported yet"); +#endif /* CONFIG_CIFS_ACL */ } else if (strncmp(ea_name, CIFS_XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) { cFYI(1, "Trusted xattr namespace not supported yet"); diff --git a/fs/coda/cache.c b/fs/coda/cache.c index 9060f08..5525e1c 100644 --- a/fs/coda/cache.c +++ b/fs/coda/cache.c @@ -93,7 +93,7 @@ static void coda_flag_children(struct dentry *parent, int flag) struct list_head *child; struct dentry *de; - spin_lock(&dcache_lock); + spin_lock(&parent->d_lock); list_for_each(child, &parent->d_subdirs) { de = list_entry(child, struct dentry, d_u.d_child); @@ -102,7 +102,7 @@ static void coda_flag_children(struct dentry *parent, int flag) continue; coda_flag_inode(de->d_inode, flag); } - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); return; } diff --git a/fs/coda/dir.c b/fs/coda/dir.c index 5d8b355..29badd9 100644 --- a/fs/coda/dir.c +++ b/fs/coda/dir.c @@ -18,6 +18,7 @@ #include <linux/errno.h> #include <linux/string.h> #include <linux/spinlock.h> +#include <linux/namei.h> #include <asm/uaccess.h> @@ -47,7 +48,7 @@ static int coda_readdir(struct file *file, void *buf, filldir_t filldir); /* dentry ops */ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd); -static int coda_dentry_delete(struct dentry *); +static int coda_dentry_delete(const struct dentry *); /* support routines */ static int coda_venus_readdir(struct file *coda_file, void *buf, @@ -125,7 +126,7 @@ static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struc return ERR_PTR(error); exit: - entry->d_op = &coda_dentry_operations; + d_set_d_op(entry, &coda_dentry_operations); if (inode && (type & CODA_NOCACHE)) coda_flag_inode(inode, C_VATTR | C_PURGE); @@ -134,10 +135,13 @@ exit: } -int coda_permission(struct inode *inode, int mask) +int coda_permission(struct inode *inode, int mask, unsigned int flags) { int error; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + mask &= MAY_READ | MAY_WRITE | MAY_EXEC; if (!mask) @@ -541,9 +545,13 @@ out: /* called when a cache lookup succeeds */ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd) { - struct inode *inode = de->d_inode; + struct inode *inode; struct coda_inode_info *cii; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = de->d_inode; if (!inode || coda_isroot(inode)) goto out; if (is_bad_inode(inode)) @@ -559,7 +567,7 @@ static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd) if (cii->c_flags & C_FLUSH) coda_flag_inode_children(inode, C_FLUSH); - if (atomic_read(&de->d_count) > 1) + if (de->d_count > 1) /* pretend it's valid, but don't change the flags */ goto out; @@ -577,7 +585,7 @@ out: * This is the callback from dput() when d_count is going to 0. * We use this to unhash dentries with bad inodes. */ -static int coda_dentry_delete(struct dentry * dentry) +static int coda_dentry_delete(const struct dentry * dentry) { int flags; diff --git a/fs/coda/inode.c b/fs/coda/inode.c index 7993b96..f065a5d 100644 --- a/fs/coda/inode.c +++ b/fs/coda/inode.c @@ -45,7 +45,7 @@ static struct kmem_cache * coda_inode_cachep; static struct inode *coda_alloc_inode(struct super_block *sb) { struct coda_inode_info *ei; - ei = (struct coda_inode_info *)kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL); + ei = kmem_cache_alloc(coda_inode_cachep, GFP_KERNEL); if (!ei) return NULL; memset(&ei->c_fid, 0, sizeof(struct CodaFid)); @@ -56,11 +56,18 @@ static struct inode *coda_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void coda_destroy_inode(struct inode *inode) +static void coda_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(coda_inode_cachep, ITOC(inode)); } +static void coda_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, coda_i_callback); +} + static void init_once(void *foo) { struct coda_inode_info *ei = (struct coda_inode_info *) foo; @@ -306,16 +313,16 @@ static int coda_statfs(struct dentry *dentry, struct kstatfs *buf) /* init_coda: used by filesystems.c to register coda */ -static int coda_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *coda_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags, data, coda_fill_super, mnt); + return mount_nodev(fs_type, flags, data, coda_fill_super); } struct file_system_type coda_fs_type = { .owner = THIS_MODULE, .name = "coda", - .get_sb = coda_get_sb, + .mount = coda_mount, .kill_sb = kill_anon_super, .fs_flags = FS_BINARY_MOUNTDATA, }; diff --git a/fs/coda/pioctl.c b/fs/coda/pioctl.c index 2fd89b5..741f0bd 100644 --- a/fs/coda/pioctl.c +++ b/fs/coda/pioctl.c @@ -24,7 +24,7 @@ #include <linux/coda_psdev.h> /* pioctl ops */ -static int coda_ioctl_permission(struct inode *inode, int mask); +static int coda_ioctl_permission(struct inode *inode, int mask, unsigned int flags); static long coda_pioctl(struct file *filp, unsigned int cmd, unsigned long user_data); @@ -41,8 +41,10 @@ const struct file_operations coda_ioctl_operations = { }; /* the coda pioctl inode ops */ -static int coda_ioctl_permission(struct inode *inode, int mask) +static int coda_ioctl_permission(struct inode *inode, int mask, unsigned int flags) { + if (flags & IPERM_FLAG_RCU) + return -ECHILD; return (mask & MAY_EXEC) ? -EACCES : 0; } diff --git a/fs/compat.c b/fs/compat.c index f03abda..eb1740a 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -29,8 +29,6 @@ #include <linux/vfs.h> #include <linux/ioctl.h> #include <linux/init.h> -#include <linux/smb.h> -#include <linux/smb_mount.h> #include <linux/ncp_mount.h> #include <linux/nfs4_mount.h> #include <linux/syscalls.h> @@ -51,6 +49,7 @@ #include <linux/eventpoll.h> #include <linux/fs_struct.h> #include <linux/slab.h> +#include <linux/pagemap.h> #include <asm/uaccess.h> #include <asm/mmu_context.h> @@ -608,14 +607,14 @@ ssize_t compat_rw_copy_check_uvector(int type, /* * Single unix specification: * We should -EINVAL if an element length is not >= 0 and fitting an - * ssize_t. The total length is fitting an ssize_t + * ssize_t. * - * Be careful here because iov_len is a size_t not an ssize_t + * In Linux, the total length is limited to MAX_RW_COUNT, there is + * no overflow possibility. */ tot_len = 0; ret = -EINVAL; for (seg = 0; seg < nr_segs; seg++) { - compat_ssize_t tmp = tot_len; compat_uptr_t buf; compat_ssize_t len; @@ -626,13 +625,13 @@ ssize_t compat_rw_copy_check_uvector(int type, } if (len < 0) /* size_t not fitting in compat_ssize_t .. */ goto out; - tot_len += len; - if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ - goto out; if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) { ret = -EFAULT; goto out; } + if (len > MAX_RW_COUNT - tot_len) + len = MAX_RW_COUNT - tot_len; + tot_len += len; iov->iov_base = compat_ptr(buf); iov->iov_len = (compat_size_t) len; uvector++; @@ -745,30 +744,6 @@ static void *do_ncp_super_data_conv(void *raw_data) return raw_data; } -struct compat_smb_mount_data { - compat_int_t version; - __compat_uid_t mounted_uid; - __compat_uid_t uid; - __compat_gid_t gid; - compat_mode_t file_mode; - compat_mode_t dir_mode; -}; - -static void *do_smb_super_data_conv(void *raw_data) -{ - struct smb_mount_data *s = raw_data; - struct compat_smb_mount_data *c_s = raw_data; - - if (c_s->version != SMB_MOUNT_OLDVERSION) - goto out; - s->dir_mode = c_s->dir_mode; - s->file_mode = c_s->file_mode; - s->gid = c_s->gid; - s->uid = c_s->uid; - s->mounted_uid = c_s->mounted_uid; - out: - return raw_data; -} struct compat_nfs_string { compat_uint_t len; @@ -835,7 +810,6 @@ static int do_nfs4_super_data_conv(void *raw_data) return 0; } -#define SMBFS_NAME "smbfs" #define NCPFS_NAME "ncpfs" #define NFS4_NAME "nfs4" @@ -870,9 +844,7 @@ asmlinkage long compat_sys_mount(const char __user * dev_name, retval = -EINVAL; if (kernel_type && data_page) { - if (!strcmp(kernel_type, SMBFS_NAME)) { - do_smb_super_data_conv((void *)data_page); - } else if (!strcmp(kernel_type, NCPFS_NAME)) { + if (!strcmp(kernel_type, NCPFS_NAME)) { do_ncp_super_data_conv((void *)data_page); } else if (!strcmp(kernel_type, NFS4_NAME)) { if (do_nfs4_super_data_conv((void *) data_page)) @@ -1378,6 +1350,10 @@ static int compat_count(compat_uptr_t __user *argv, int max) argv++; if (i++ >= max) return -E2BIG; + + if (fatal_signal_pending(current)) + return -ERESTARTNOHAND; + cond_resched(); } } return i; @@ -1419,6 +1395,12 @@ static int compat_copy_strings(int argc, compat_uptr_t __user *argv, while (len > 0) { int offset, bytes_to_copy; + if (fatal_signal_pending(current)) { + ret = -ERESTARTNOHAND; + goto out; + } + cond_resched(); + offset = pos % PAGE_SIZE; if (offset == 0) offset = PAGE_SIZE; @@ -1435,18 +1417,8 @@ static int compat_copy_strings(int argc, compat_uptr_t __user *argv, if (!kmapped_page || kpos != (pos & PAGE_MASK)) { struct page *page; -#ifdef CONFIG_STACK_GROWSUP - ret = expand_stack_downwards(bprm->vma, pos); - if (ret < 0) { - /* We've exceed the stack rlimit. */ - ret = -E2BIG; - goto out; - } -#endif - ret = get_user_pages(current, bprm->mm, pos, - 1, 1, 1, &page, NULL); - if (ret <= 0) { - /* We've exceed the stack rlimit. */ + page = get_arg_page(bprm, pos, 1); + if (!page) { ret = -E2BIG; goto out; } @@ -1567,8 +1539,10 @@ int compat_do_execve(char * filename, return retval; out: - if (bprm->mm) + if (bprm->mm) { + acct_arg_size(bprm, 0); mmput(bprm->mm); + } out_file: if (bprm->file) { diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index d0ad09d..61abb63 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -19,7 +19,6 @@ #include <linux/compiler.h> #include <linux/sched.h> #include <linux/smp.h> -#include <linux/smp_lock.h> #include <linux/ioctl.h> #include <linux/if.h> #include <linux/if_bridge.h> @@ -43,10 +42,9 @@ #include <linux/tty.h> #include <linux/vt_kern.h> #include <linux/fb.h> -#include <linux/videodev.h> +#include <linux/videodev2.h> #include <linux/netdevice.h> #include <linux/raw.h> -#include <linux/smb_fs.h> #include <linux/blkdev.h> #include <linux/elevator.h> #include <linux/rtc.h> @@ -558,25 +556,6 @@ static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, void __user *argp) #endif /* CONFIG_BLOCK */ -static int do_smb_getmountuid(unsigned int fd, unsigned int cmd, - compat_uid_t __user *argp) -{ - mm_segment_t old_fs = get_fs(); - __kernel_uid_t kuid; - int err; - - cmd = SMB_IOC_GETMOUNTUID; - - set_fs(KERNEL_DS); - err = sys_ioctl(fd, cmd, (unsigned long)&kuid); - set_fs(old_fs); - - if (err >= 0) - err = put_user(kuid, argp); - - return err; -} - /* Bluetooth ioctls */ #define HCIUARTSETPROTO _IOW('U', 200, int) #define HCIUARTGETPROTO _IOR('U', 201, int) @@ -857,6 +836,7 @@ COMPATIBLE_IOCTL(TCSETSW) COMPATIBLE_IOCTL(TCSETSF) COMPATIBLE_IOCTL(TIOCLINUX) COMPATIBLE_IOCTL(TIOCSBRK) +COMPATIBLE_IOCTL(TIOCGDEV) COMPATIBLE_IOCTL(TIOCCBRK) COMPATIBLE_IOCTL(TIOCGSID) COMPATIBLE_IOCTL(TIOCGICOUNT) @@ -1199,8 +1179,9 @@ COMPATIBLE_IOCTL(SOUND_MIXER_PRIVATE5) COMPATIBLE_IOCTL(SOUND_MIXER_GETLEVELS) COMPATIBLE_IOCTL(SOUND_MIXER_SETLEVELS) COMPATIBLE_IOCTL(OSS_GETVERSION) -/* SMB ioctls which do not need any translations */ -COMPATIBLE_IOCTL(SMB_IOC_NEWCONN) +/* Raw devices */ +COMPATIBLE_IOCTL(RAW_SETBIND) +COMPATIBLE_IOCTL(RAW_GETBIND) /* Watchdog */ COMPATIBLE_IOCTL(WDIOC_GETSUPPORT) COMPATIBLE_IOCTL(WDIOC_GETSTATUS) @@ -1458,10 +1439,6 @@ static long do_ioctl_trans(int fd, unsigned int cmd, case MTIOCPOS32: return mt_ioctl_trans(fd, cmd, argp); #endif - /* One SMB ioctl needs translations. */ -#define SMB_IOC_GETMOUNTUID_32 _IOR('u', 1, compat_uid_t) - case SMB_IOC_GETMOUNTUID_32: - return do_smb_getmountuid(fd, cmd, argp); /* Serial */ case TIOCGSERIAL: case TIOCSSERIAL: diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h index da6061a..026cf68 100644 --- a/fs/configfs/configfs_internal.h +++ b/fs/configfs/configfs_internal.h @@ -120,7 +120,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry { struct config_item * item = NULL; - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); if (!d_unhashed(dentry)) { struct configfs_dirent * sd = dentry->d_fsdata; if (sd->s_type & CONFIGFS_ITEM_LINK) { @@ -129,7 +129,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry } else item = config_item_get(sd->s_element); } - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); return item; } diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index 0b502f8..36637a8 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -67,7 +67,7 @@ static void configfs_d_iput(struct dentry * dentry, * We _must_ delete our dentries on last dput, as the chain-to-parent * behavior is required to clear the parents of default_groups. */ -static int configfs_d_delete(struct dentry *dentry) +static int configfs_d_delete(const struct dentry *dentry) { return 1; } @@ -232,10 +232,8 @@ int configfs_make_dirent(struct configfs_dirent * parent_sd, sd->s_mode = mode; sd->s_dentry = dentry; - if (dentry) { + if (dentry) dentry->d_fsdata = configfs_get(sd); - dentry->d_op = &configfs_dentry_ops; - } return 0; } @@ -278,7 +276,6 @@ static int create_dir(struct config_item * k, struct dentry * p, error = configfs_create(d, mode, init_dir); if (!error) { inc_nlink(p->d_inode); - (d)->d_op = &configfs_dentry_ops; } else { struct configfs_dirent *sd = d->d_fsdata; if (sd) { @@ -371,9 +368,7 @@ int configfs_create_link(struct configfs_symlink *sl, CONFIGFS_ITEM_LINK); if (!err) { err = configfs_create(dentry, mode, init_symlink); - if (!err) - dentry->d_op = &configfs_dentry_ops; - else { + if (err) { struct configfs_dirent *sd = dentry->d_fsdata; if (sd) { spin_lock(&configfs_dirent_lock); @@ -399,8 +394,7 @@ static void remove_dir(struct dentry * d) if (d->d_inode) simple_rmdir(parent->d_inode,d); - pr_debug(" o %s removing done (%d)\n",d->d_name.name, - atomic_read(&d->d_count)); + pr_debug(" o %s removing done (%d)\n",d->d_name.name, d->d_count); dput(parent); } @@ -448,7 +442,7 @@ static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * den return error; } - dentry->d_op = &configfs_dentry_ops; + d_set_d_op(dentry, &configfs_dentry_ops); d_rehash(dentry); return 0; @@ -493,7 +487,11 @@ static struct dentry * configfs_lookup(struct inode *dir, * If it doesn't exist and it isn't a NOT_PINNED item, * it must be negative. */ - return simple_lookup(dir, dentry, nd); + if (dentry->d_name.len > NAME_MAX) + return ERR_PTR(-ENAMETOOLONG); + d_set_d_op(dentry, &configfs_dentry_ops); + d_add(dentry, NULL); + return NULL; } out: @@ -685,6 +683,7 @@ static int create_default_group(struct config_group *parent_group, ret = -ENOMEM; child = d_alloc(parent, &name); if (child) { + d_set_d_op(child, &configfs_dentry_ops); d_add(child, NULL); ret = configfs_attach_group(&parent_group->cg_item, @@ -1682,6 +1681,7 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys) err = -ENOMEM; dentry = d_alloc(configfs_sb->s_root, &name); if (dentry) { + d_set_d_op(dentry, &configfs_dentry_ops); d_add(dentry, NULL); err = configfs_attach_group(sd->s_element, &group->cg_item, diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 253476d..c83f476 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -250,18 +250,14 @@ void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent) struct dentry * dentry = sd->s_dentry; if (dentry) { - spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); if (!(d_unhashed(dentry) && dentry->d_inode)) { - dget_locked(dentry); + dget_dlock(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); simple_unlink(parent->d_inode, dentry); - } else { + } else spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); - } } } diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c index 8c8d642..7d3607f 100644 --- a/fs/configfs/mount.c +++ b/fs/configfs/mount.c @@ -104,16 +104,16 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent) return 0; } -static int configfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *configfs_do_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_single(fs_type, flags, data, configfs_fill_super, mnt); + return mount_single(fs_type, flags, data, configfs_fill_super); } static struct file_system_type configfs_fs_type = { .owner = THIS_MODULE, .name = "configfs", - .get_sb = configfs_get_sb, + .mount = configfs_do_mount, .kill_sb = kill_litter_super, }; diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 1e7a330..e141939 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -34,57 +34,81 @@ static const struct address_space_operations cramfs_aops; static DEFINE_MUTEX(read_mutex); -/* These two macros may change in future, to provide better st_ino - semantics. */ -#define CRAMINO(x) (((x)->offset && (x)->size)?(x)->offset<<2:1) +/* These macros may change in future, to provide better st_ino semantics. */ #define OFFSET(x) ((x)->i_ino) -static void setup_inode(struct inode *inode, struct cramfs_inode * cramfs_inode) +static unsigned long cramino(struct cramfs_inode *cino, unsigned int offset) { + if (!cino->offset) + return offset + 1; + if (!cino->size) + return offset + 1; + + /* + * The file mode test fixes buggy mkcramfs implementations where + * cramfs_inode->offset is set to a non zero value for entries + * which did not contain data, like devices node and fifos. + */ + switch (cino->mode & S_IFMT) { + case S_IFREG: + case S_IFDIR: + case S_IFLNK: + return cino->offset << 2; + default: + break; + } + return offset + 1; +} + +static struct inode *get_cramfs_inode(struct super_block *sb, + struct cramfs_inode *cramfs_inode, unsigned int offset) +{ + struct inode *inode; static struct timespec zerotime; + + inode = iget_locked(sb, cramino(cramfs_inode, offset)); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + switch (cramfs_inode->mode & S_IFMT) { + case S_IFREG: + inode->i_fop = &generic_ro_fops; + inode->i_data.a_ops = &cramfs_aops; + break; + case S_IFDIR: + inode->i_op = &cramfs_dir_inode_operations; + inode->i_fop = &cramfs_directory_operations; + break; + case S_IFLNK: + inode->i_op = &page_symlink_inode_operations; + inode->i_data.a_ops = &cramfs_aops; + break; + default: + init_special_inode(inode, cramfs_inode->mode, + old_decode_dev(cramfs_inode->size)); + } + inode->i_mode = cramfs_inode->mode; inode->i_uid = cramfs_inode->uid; - inode->i_size = cramfs_inode->size; - inode->i_blocks = (cramfs_inode->size - 1) / 512 + 1; inode->i_gid = cramfs_inode->gid; + + /* if the lower 2 bits are zero, the inode contains data */ + if (!(inode->i_ino & 3)) { + inode->i_size = cramfs_inode->size; + inode->i_blocks = (cramfs_inode->size - 1) / 512 + 1; + } + /* Struct copy intentional */ inode->i_mtime = inode->i_atime = inode->i_ctime = zerotime; /* inode->i_nlink is left 1 - arguably wrong for directories, but it's the best we can do without reading the directory contents. 1 yields the right result in GNU find, even without -noleaf option. */ - if (S_ISREG(inode->i_mode)) { - inode->i_fop = &generic_ro_fops; - inode->i_data.a_ops = &cramfs_aops; - } else if (S_ISDIR(inode->i_mode)) { - inode->i_op = &cramfs_dir_inode_operations; - inode->i_fop = &cramfs_directory_operations; - } else if (S_ISLNK(inode->i_mode)) { - inode->i_op = &page_symlink_inode_operations; - inode->i_data.a_ops = &cramfs_aops; - } else { - init_special_inode(inode, inode->i_mode, - old_decode_dev(cramfs_inode->size)); - } -} -static struct inode *get_cramfs_inode(struct super_block *sb, - struct cramfs_inode * cramfs_inode) -{ - struct inode *inode; - if (CRAMINO(cramfs_inode) == 1) { - inode = new_inode(sb); - if (inode) { - inode->i_ino = 1; - setup_inode(inode, cramfs_inode); - } - } else { - inode = iget_locked(sb, CRAMINO(cramfs_inode)); - if (inode && (inode->i_state & I_NEW)) { - setup_inode(inode, cramfs_inode); - unlock_new_inode(inode); - } - } + unlock_new_inode(inode); + return inode; } @@ -265,6 +289,9 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent) printk(KERN_ERR "cramfs: root is not a directory\n"); goto out; } + /* correct strange, hard-coded permissions of mkcramfs */ + super.root.mode |= (S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); + root_offset = super.root.offset << 2; if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) { sbi->size=super.size; @@ -289,7 +316,7 @@ static int cramfs_fill_super(struct super_block *sb, void *data, int silent) /* Set it all up.. */ sb->s_op = &cramfs_ops; - root = get_cramfs_inode(sb, &super.root); + root = get_cramfs_inode(sb, &super.root, 0); if (!root) goto out; sb->s_root = d_alloc_root(root); @@ -365,7 +392,7 @@ static int cramfs_readdir(struct file *filp, void *dirent, filldir_t filldir) */ namelen = de->namelen << 2; memcpy(buf, name, namelen); - ino = CRAMINO(de); + ino = cramino(de, OFFSET(inode) + offset); mode = de->mode; mutex_unlock(&read_mutex); nextoffset = offset + sizeof(*de) + namelen; @@ -404,8 +431,9 @@ static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, s struct cramfs_inode *de; char *name; int namelen, retval; + int dir_off = OFFSET(dir) + offset; - de = cramfs_read(dir->i_sb, OFFSET(dir) + offset, sizeof(*de)+CRAMFS_MAXPATHLEN); + de = cramfs_read(dir->i_sb, dir_off, sizeof(*de)+CRAMFS_MAXPATHLEN); name = (char *)(de+1); /* Try to take advantage of sorted directories */ @@ -436,7 +464,7 @@ static struct dentry * cramfs_lookup(struct inode *dir, struct dentry *dentry, s if (!retval) { struct cramfs_inode entry = *de; mutex_unlock(&read_mutex); - d_add(dentry, get_cramfs_inode(dir->i_sb, &entry)); + d_add(dentry, get_cramfs_inode(dir->i_sb, &entry, dir_off)); return NULL; } /* else (retval < 0) */ @@ -533,17 +561,16 @@ static const struct super_operations cramfs_ops = { .statfs = cramfs_statfs, }; -static int cramfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *cramfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, cramfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, cramfs_fill_super); } static struct file_system_type cramfs_fs_type = { .owner = THIS_MODULE, .name = "cramfs", - .get_sb = cramfs_get_sb, + .mount = cramfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/dcache.c b/fs/dcache.c index 23702a9..5699d4c 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -33,20 +33,58 @@ #include <linux/bootmem.h> #include <linux/fs_struct.h> #include <linux/hardirq.h> +#include <linux/bit_spinlock.h> +#include <linux/rculist_bl.h> #include "internal.h" +/* + * Usage: + * dcache->d_inode->i_lock protects: + * - i_dentry, d_alias, d_inode of aliases + * dcache_hash_bucket lock protects: + * - the dcache hash table + * s_anon bl list spinlock protects: + * - the s_anon list (see __d_drop) + * dcache_lru_lock protects: + * - the dcache lru lists and counters + * d_lock protects: + * - d_flags + * - d_name + * - d_lru + * - d_count + * - d_unhashed() + * - d_parent and d_subdirs + * - childrens' d_child and d_parent + * - d_alias, d_inode + * + * Ordering: + * dentry->d_inode->i_lock + * dentry->d_lock + * dcache_lru_lock + * dcache_hash_bucket lock + * s_anon lock + * + * If there is an ancestor relationship: + * dentry->d_parent->...->d_parent->d_lock + * ... + * dentry->d_parent->d_lock + * dentry->d_lock + * + * If no ancestor relationship: + * if (dentry1 < dentry2) + * dentry1->d_lock + * dentry2->d_lock + */ int sysctl_vfs_cache_pressure __read_mostly = 100; EXPORT_SYMBOL_GPL(sysctl_vfs_cache_pressure); - __cacheline_aligned_in_smp DEFINE_SPINLOCK(dcache_lock); +static __cacheline_aligned_in_smp DEFINE_SPINLOCK(dcache_lru_lock); __cacheline_aligned_in_smp DEFINE_SEQLOCK(rename_lock); -EXPORT_SYMBOL(dcache_lock); +EXPORT_SYMBOL(rename_lock); static struct kmem_cache *dentry_cache __read_mostly; -#define DNAME_INLINE_LEN (sizeof(struct dentry)-offsetof(struct dentry,d_iname)) - /* * This is the single most critical data structure when it comes * to the dcache: the hashtable for lookups. Somebody should try @@ -60,22 +98,51 @@ static struct kmem_cache *dentry_cache __read_mostly; static unsigned int d_hash_mask __read_mostly; static unsigned int d_hash_shift __read_mostly; -static struct hlist_head *dentry_hashtable __read_mostly; + +struct dcache_hash_bucket { + struct hlist_bl_head head; +}; +static struct dcache_hash_bucket *dentry_hashtable __read_mostly; + +static inline struct dcache_hash_bucket *d_hash(struct dentry *parent, + unsigned long hash) +{ + hash += ((unsigned long) parent ^ GOLDEN_RATIO_PRIME) / L1_CACHE_BYTES; + hash = hash ^ ((hash ^ GOLDEN_RATIO_PRIME) >> D_HASHBITS); + return dentry_hashtable + (hash & D_HASHMASK); +} + +static inline void spin_lock_bucket(struct dcache_hash_bucket *b) +{ + bit_spin_lock(0, (unsigned long *)&b->head.first); +} + +static inline void spin_unlock_bucket(struct dcache_hash_bucket *b) +{ + __bit_spin_unlock(0, (unsigned long *)&b->head.first); +} /* Statistics gathering. */ struct dentry_stat_t dentry_stat = { .age_limit = 45, }; -static struct percpu_counter nr_dentry __cacheline_aligned_in_smp; -static struct percpu_counter nr_dentry_unused __cacheline_aligned_in_smp; +static DEFINE_PER_CPU(unsigned int, nr_dentry); #if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS) +static int get_nr_dentry(void) +{ + int i; + int sum = 0; + for_each_possible_cpu(i) + sum += per_cpu(nr_dentry, i); + return sum < 0 ? 0 : sum; +} + int proc_nr_dentry(ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { - dentry_stat.nr_dentry = percpu_counter_sum_positive(&nr_dentry); - dentry_stat.nr_unused = percpu_counter_sum_positive(&nr_dentry_unused); + dentry_stat.nr_dentry = get_nr_dentry(); return proc_dointvec(table, write, buffer, lenp, ppos); } #endif @@ -91,35 +158,50 @@ static void __d_free(struct rcu_head *head) } /* - * no dcache_lock, please. + * no locks, please. */ static void d_free(struct dentry *dentry) { - percpu_counter_dec(&nr_dentry); + BUG_ON(dentry->d_count); + this_cpu_dec(nr_dentry); if (dentry->d_op && dentry->d_op->d_release) dentry->d_op->d_release(dentry); /* if dentry was never inserted into hash, immediate free is OK */ - if (hlist_unhashed(&dentry->d_hash)) + if (hlist_bl_unhashed(&dentry->d_hash)) __d_free(&dentry->d_u.d_rcu); else call_rcu(&dentry->d_u.d_rcu, __d_free); } +/** + * dentry_rcuwalk_barrier - invalidate in-progress rcu-walk lookups + * After this call, in-progress rcu-walk path lookup will fail. This + * should be called after unhashing, and after changing d_inode (if + * the dentry has not already been unhashed). + */ +static inline void dentry_rcuwalk_barrier(struct dentry *dentry) +{ + assert_spin_locked(&dentry->d_lock); + /* Go through a barrier */ + write_seqcount_barrier(&dentry->d_seq); +} + /* * Release the dentry's inode, using the filesystem - * d_iput() operation if defined. + * d_iput() operation if defined. Dentry has no refcount + * and is unhashed. */ static void dentry_iput(struct dentry * dentry) __releases(dentry->d_lock) - __releases(dcache_lock) + __releases(dentry->d_inode->i_lock) { struct inode *inode = dentry->d_inode; if (inode) { dentry->d_inode = NULL; list_del_init(&dentry->d_alias); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); if (!inode->i_nlink) fsnotify_inoderemove(inode); if (dentry->d_op && dentry->d_op->d_iput) @@ -128,40 +210,72 @@ static void dentry_iput(struct dentry * dentry) iput(inode); } else { spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); } } /* - * dentry_lru_(add|del|move_tail) must be called with dcache_lock held. + * Release the dentry's inode, using the filesystem + * d_iput() operation if defined. dentry remains in-use. + */ +static void dentry_unlink_inode(struct dentry * dentry) + __releases(dentry->d_lock) + __releases(dentry->d_inode->i_lock) +{ + struct inode *inode = dentry->d_inode; + dentry->d_inode = NULL; + list_del_init(&dentry->d_alias); + dentry_rcuwalk_barrier(dentry); + spin_unlock(&dentry->d_lock); + spin_unlock(&inode->i_lock); + if (!inode->i_nlink) + fsnotify_inoderemove(inode); + if (dentry->d_op && dentry->d_op->d_iput) + dentry->d_op->d_iput(dentry, inode); + else + iput(inode); +} + +/* + * dentry_lru_(add|del|move_tail) must be called with d_lock held. */ static void dentry_lru_add(struct dentry *dentry) { if (list_empty(&dentry->d_lru)) { + spin_lock(&dcache_lru_lock); list_add(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); dentry->d_sb->s_nr_dentry_unused++; - percpu_counter_inc(&nr_dentry_unused); + dentry_stat.nr_unused++; + spin_unlock(&dcache_lru_lock); } } +static void __dentry_lru_del(struct dentry *dentry) +{ + list_del_init(&dentry->d_lru); + dentry->d_sb->s_nr_dentry_unused--; + dentry_stat.nr_unused--; +} + static void dentry_lru_del(struct dentry *dentry) { if (!list_empty(&dentry->d_lru)) { - list_del_init(&dentry->d_lru); - dentry->d_sb->s_nr_dentry_unused--; - percpu_counter_dec(&nr_dentry_unused); + spin_lock(&dcache_lru_lock); + __dentry_lru_del(dentry); + spin_unlock(&dcache_lru_lock); } } static void dentry_lru_move_tail(struct dentry *dentry) { + spin_lock(&dcache_lru_lock); if (list_empty(&dentry->d_lru)) { list_add_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); dentry->d_sb->s_nr_dentry_unused++; - percpu_counter_inc(&nr_dentry_unused); + dentry_stat.nr_unused++; } else { list_move_tail(&dentry->d_lru, &dentry->d_sb->s_dentry_lru); } + spin_unlock(&dcache_lru_lock); } /** @@ -171,22 +285,115 @@ static void dentry_lru_move_tail(struct dentry *dentry) * The dentry must already be unhashed and removed from the LRU. * * If this is the root of the dentry tree, return NULL. + * + * dentry->d_lock and parent->d_lock must be held by caller, and are dropped by + * d_kill. */ -static struct dentry *d_kill(struct dentry *dentry) +static struct dentry *d_kill(struct dentry *dentry, struct dentry *parent) __releases(dentry->d_lock) - __releases(dcache_lock) + __releases(parent->d_lock) + __releases(dentry->d_inode->i_lock) { - struct dentry *parent; - + dentry->d_parent = NULL; list_del(&dentry->d_u.d_child); - /*drops the locks, at that point nobody can reach this dentry */ + if (parent) + spin_unlock(&parent->d_lock); dentry_iput(dentry); + /* + * dentry_iput drops the locks, at which point nobody (except + * transient RCU lookups) can reach this dentry. + */ + d_free(dentry); + return parent; +} + +/** + * d_drop - drop a dentry + * @dentry: dentry to drop + * + * d_drop() unhashes the entry from the parent dentry hashes, so that it won't + * be found through a VFS lookup any more. Note that this is different from + * deleting the dentry - d_delete will try to mark the dentry negative if + * possible, giving a successful _negative_ lookup, while d_drop will + * just make the cache lookup fail. + * + * d_drop() is used mainly for stuff that wants to invalidate a dentry for some + * reason (NFS timeouts or autofs deletes). + * + * __d_drop requires dentry->d_lock. + */ +void __d_drop(struct dentry *dentry) +{ + if (!(dentry->d_flags & DCACHE_UNHASHED)) { + if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED)) { + bit_spin_lock(0, + (unsigned long *)&dentry->d_sb->s_anon.first); + dentry->d_flags |= DCACHE_UNHASHED; + hlist_bl_del_init(&dentry->d_hash); + __bit_spin_unlock(0, + (unsigned long *)&dentry->d_sb->s_anon.first); + } else { + struct dcache_hash_bucket *b; + b = d_hash(dentry->d_parent, dentry->d_name.hash); + spin_lock_bucket(b); + /* + * We may not actually need to put DCACHE_UNHASHED + * manipulations under the hash lock, but follow + * the principle of least surprise. + */ + dentry->d_flags |= DCACHE_UNHASHED; + hlist_bl_del_rcu(&dentry->d_hash); + spin_unlock_bucket(b); + dentry_rcuwalk_barrier(dentry); + } + } +} +EXPORT_SYMBOL(__d_drop); + +void d_drop(struct dentry *dentry) +{ + spin_lock(&dentry->d_lock); + __d_drop(dentry); + spin_unlock(&dentry->d_lock); +} +EXPORT_SYMBOL(d_drop); + +/* + * Finish off a dentry we've decided to kill. + * dentry->d_lock must be held, returns with it unlocked. + * If ref is non-zero, then decrement the refcount too. + * Returns dentry requiring refcount drop, or NULL if we're done. + */ +static inline struct dentry *dentry_kill(struct dentry *dentry, int ref) + __releases(dentry->d_lock) +{ + struct inode *inode; + struct dentry *parent; + + inode = dentry->d_inode; + if (inode && !spin_trylock(&inode->i_lock)) { +relock: + spin_unlock(&dentry->d_lock); + cpu_relax(); + return dentry; /* try again with same dentry */ + } if (IS_ROOT(dentry)) parent = NULL; else parent = dentry->d_parent; - d_free(dentry); - return parent; + if (parent && !spin_trylock(&parent->d_lock)) { + if (inode) + spin_unlock(&inode->i_lock); + goto relock; + } + + if (ref) + dentry->d_count--; + /* if dentry was on the d_lru list delete it from there */ + dentry_lru_del(dentry); + /* if it was on the hash then remove it */ + __d_drop(dentry); + return d_kill(dentry, parent); } /* @@ -214,34 +421,26 @@ static struct dentry *d_kill(struct dentry *dentry) * call the dentry unlink method as well as removing it from the queues and * releasing its resources. If the parent dentries were scheduled for release * they too may now get deleted. - * - * no dcache lock, please. */ - void dput(struct dentry *dentry) { if (!dentry) return; repeat: - if (atomic_read(&dentry->d_count) == 1) + if (dentry->d_count == 1) might_sleep(); - if (!atomic_dec_and_lock(&dentry->d_count, &dcache_lock)) - return; - spin_lock(&dentry->d_lock); - if (atomic_read(&dentry->d_count)) { + BUG_ON(!dentry->d_count); + if (dentry->d_count > 1) { + dentry->d_count--; spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); return; } - /* - * AV: ->d_delete() is _NOT_ allowed to block now. - */ - if (dentry->d_op && dentry->d_op->d_delete) { + if (dentry->d_flags & DCACHE_OP_DELETE) { if (dentry->d_op->d_delete(dentry)) - goto unhash_it; + goto kill_it; } /* Unreachable? Get rid of it */ @@ -252,16 +451,12 @@ repeat: dentry->d_flags |= DCACHE_REFERENCED; dentry_lru_add(dentry); - spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); + dentry->d_count--; + spin_unlock(&dentry->d_lock); return; -unhash_it: - __d_drop(dentry); kill_it: - /* if dentry was on the d_lru list delete it from there */ - dentry_lru_del(dentry); - dentry = d_kill(dentry); + dentry = dentry_kill(dentry, 1); if (dentry) goto repeat; } @@ -284,9 +479,9 @@ int d_invalidate(struct dentry * dentry) /* * If it's already been dropped, return OK. */ - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); if (d_unhashed(dentry)) { - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); return 0; } /* @@ -294,9 +489,9 @@ int d_invalidate(struct dentry * dentry) * to get rid of unused child entries. */ if (!list_empty(&dentry->d_subdirs)) { - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); shrink_dcache_parent(dentry); - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); } /* @@ -309,35 +504,61 @@ int d_invalidate(struct dentry * dentry) * we might still populate it if it was a * working directory or similar). */ - spin_lock(&dentry->d_lock); - if (atomic_read(&dentry->d_count) > 1) { + if (dentry->d_count > 1) { if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) { spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); return -EBUSY; } } __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); return 0; } EXPORT_SYMBOL(d_invalidate); -/* This should be called _only_ with dcache_lock held */ -static inline struct dentry * __dget_locked(struct dentry *dentry) +/* This must be called with d_lock held */ +static inline void __dget_dlock(struct dentry *dentry) { - atomic_inc(&dentry->d_count); - dentry_lru_del(dentry); - return dentry; + dentry->d_count++; } -struct dentry * dget_locked(struct dentry *dentry) +static inline void __dget(struct dentry *dentry) { - return __dget_locked(dentry); + spin_lock(&dentry->d_lock); + __dget_dlock(dentry); + spin_unlock(&dentry->d_lock); +} + +struct dentry *dget_parent(struct dentry *dentry) +{ + struct dentry *ret; + +repeat: + /* + * Don't need rcu_dereference because we re-check it was correct under + * the lock. + */ + rcu_read_lock(); + ret = dentry->d_parent; + if (!ret) { + rcu_read_unlock(); + goto out; + } + spin_lock(&ret->d_lock); + if (unlikely(ret != dentry->d_parent)) { + spin_unlock(&ret->d_lock); + rcu_read_unlock(); + goto repeat; + } + rcu_read_unlock(); + BUG_ON(!ret->d_count); + ret->d_count++; + spin_unlock(&ret->d_lock); +out: + return ret; } -EXPORT_SYMBOL(dget_locked); +EXPORT_SYMBOL(dget_parent); /** * d_find_alias - grab a hashed alias of inode @@ -355,42 +576,51 @@ EXPORT_SYMBOL(dget_locked); * any other hashed alias over that one unless @want_discon is set, * in which case only return an IS_ROOT, DCACHE_DISCONNECTED alias. */ - -static struct dentry * __d_find_alias(struct inode *inode, int want_discon) +static struct dentry *__d_find_alias(struct inode *inode, int want_discon) { - struct list_head *head, *next, *tmp; - struct dentry *alias, *discon_alias=NULL; + struct dentry *alias, *discon_alias; - head = &inode->i_dentry; - next = inode->i_dentry.next; - while (next != head) { - tmp = next; - next = tmp->next; - prefetch(next); - alias = list_entry(tmp, struct dentry, d_alias); +again: + discon_alias = NULL; + list_for_each_entry(alias, &inode->i_dentry, d_alias) { + spin_lock(&alias->d_lock); if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) { if (IS_ROOT(alias) && - (alias->d_flags & DCACHE_DISCONNECTED)) + (alias->d_flags & DCACHE_DISCONNECTED)) { discon_alias = alias; - else if (!want_discon) { - __dget_locked(alias); + } else if (!want_discon) { + __dget_dlock(alias); + spin_unlock(&alias->d_lock); + return alias; + } + } + spin_unlock(&alias->d_lock); + } + if (discon_alias) { + alias = discon_alias; + spin_lock(&alias->d_lock); + if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) { + if (IS_ROOT(alias) && + (alias->d_flags & DCACHE_DISCONNECTED)) { + __dget_dlock(alias); + spin_unlock(&alias->d_lock); return alias; } } + spin_unlock(&alias->d_lock); + goto again; } - if (discon_alias) - __dget_locked(discon_alias); - return discon_alias; + return NULL; } -struct dentry * d_find_alias(struct inode *inode) +struct dentry *d_find_alias(struct inode *inode) { struct dentry *de = NULL; if (!list_empty(&inode->i_dentry)) { - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); de = __d_find_alias(inode, 0); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); } return de; } @@ -404,54 +634,61 @@ void d_prune_aliases(struct inode *inode) { struct dentry *dentry; restart: - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); list_for_each_entry(dentry, &inode->i_dentry, d_alias) { spin_lock(&dentry->d_lock); - if (!atomic_read(&dentry->d_count)) { - __dget_locked(dentry); + if (!dentry->d_count) { + __dget_dlock(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); dput(dentry); goto restart; } spin_unlock(&dentry->d_lock); } - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); } EXPORT_SYMBOL(d_prune_aliases); /* - * Throw away a dentry - free the inode, dput the parent. This requires that - * the LRU list has already been removed. + * Try to throw away a dentry - free the inode, dput the parent. + * Requires dentry->d_lock is held, and dentry->d_count == 0. + * Releases dentry->d_lock. * - * Try to prune ancestors as well. This is necessary to prevent - * quadratic behavior of shrink_dcache_parent(), but is also expected - * to be beneficial in reducing dentry cache fragmentation. + * This may fail if locks cannot be acquired no problem, just try again. */ -static void prune_one_dentry(struct dentry * dentry) +static void try_prune_one_dentry(struct dentry *dentry) __releases(dentry->d_lock) - __releases(dcache_lock) - __acquires(dcache_lock) { - __d_drop(dentry); - dentry = d_kill(dentry); + struct dentry *parent; + parent = dentry_kill(dentry, 0); /* - * Prune ancestors. Locking is simpler than in dput(), - * because dcache_lock needs to be taken anyway. + * If dentry_kill returns NULL, we have nothing more to do. + * if it returns the same dentry, trylocks failed. In either + * case, just loop again. + * + * Otherwise, we need to prune ancestors too. This is necessary + * to prevent quadratic behavior of shrink_dcache_parent(), but + * is also expected to be beneficial in reducing dentry cache + * fragmentation. */ - spin_lock(&dcache_lock); + if (!parent) + return; + if (parent == dentry) + return; + + /* Prune ancestors. */ + dentry = parent; while (dentry) { - if (!atomic_dec_and_lock(&dentry->d_count, &dentry->d_lock)) + spin_lock(&dentry->d_lock); + if (dentry->d_count > 1) { + dentry->d_count--; + spin_unlock(&dentry->d_lock); return; - - if (dentry->d_op && dentry->d_op->d_delete) - dentry->d_op->d_delete(dentry); - dentry_lru_del(dentry); - __d_drop(dentry); - dentry = d_kill(dentry); - spin_lock(&dcache_lock); + } + dentry = dentry_kill(dentry, 1); } } @@ -459,24 +696,35 @@ static void shrink_dentry_list(struct list_head *list) { struct dentry *dentry; - while (!list_empty(list)) { - dentry = list_entry(list->prev, struct dentry, d_lru); - dentry_lru_del(dentry); + rcu_read_lock(); + for (;;) { + dentry = list_entry_rcu(list->prev, struct dentry, d_lru); + if (&dentry->d_lru == list) + break; /* empty */ + spin_lock(&dentry->d_lock); + if (dentry != list_entry(list->prev, struct dentry, d_lru)) { + spin_unlock(&dentry->d_lock); + continue; + } /* * We found an inuse dentry which was not removed from * the LRU because of laziness during lookup. Do not free * it - just keep it off the LRU list. */ - spin_lock(&dentry->d_lock); - if (atomic_read(&dentry->d_count)) { + if (dentry->d_count) { + dentry_lru_del(dentry); spin_unlock(&dentry->d_lock); continue; } - prune_one_dentry(dentry); - /* dentry->d_lock was dropped in prune_one_dentry() */ - cond_resched_lock(&dcache_lock); + + rcu_read_unlock(); + + try_prune_one_dentry(dentry); + + rcu_read_lock(); } + rcu_read_unlock(); } /** @@ -495,42 +743,44 @@ static void __shrink_dcache_sb(struct super_block *sb, int *count, int flags) LIST_HEAD(tmp); int cnt = *count; - spin_lock(&dcache_lock); +relock: + spin_lock(&dcache_lru_lock); while (!list_empty(&sb->s_dentry_lru)) { dentry = list_entry(sb->s_dentry_lru.prev, struct dentry, d_lru); BUG_ON(dentry->d_sb != sb); + if (!spin_trylock(&dentry->d_lock)) { + spin_unlock(&dcache_lru_lock); + cpu_relax(); + goto relock; + } + /* * If we are honouring the DCACHE_REFERENCED flag and the * dentry has this flag set, don't free it. Clear the flag * and put it back on the LRU. */ - if (flags & DCACHE_REFERENCED) { - spin_lock(&dentry->d_lock); - if (dentry->d_flags & DCACHE_REFERENCED) { - dentry->d_flags &= ~DCACHE_REFERENCED; - list_move(&dentry->d_lru, &referenced); - spin_unlock(&dentry->d_lock); - cond_resched_lock(&dcache_lock); - continue; - } + if (flags & DCACHE_REFERENCED && + dentry->d_flags & DCACHE_REFERENCED) { + dentry->d_flags &= ~DCACHE_REFERENCED; + list_move(&dentry->d_lru, &referenced); spin_unlock(&dentry->d_lock); + } else { + list_move_tail(&dentry->d_lru, &tmp); + spin_unlock(&dentry->d_lock); + if (!--cnt) + break; } - - list_move_tail(&dentry->d_lru, &tmp); - if (!--cnt) - break; - cond_resched_lock(&dcache_lock); + cond_resched_lock(&dcache_lru_lock); } - - *count = cnt; - shrink_dentry_list(&tmp); - if (!list_empty(&referenced)) list_splice(&referenced, &sb->s_dentry_lru); - spin_unlock(&dcache_lock); + spin_unlock(&dcache_lru_lock); + shrink_dentry_list(&tmp); + + *count = cnt; } /** @@ -546,13 +796,12 @@ static void prune_dcache(int count) { struct super_block *sb, *p = NULL; int w_count; - int unused = percpu_counter_sum_positive(&nr_dentry_unused); + int unused = dentry_stat.nr_unused; int prune_ratio; int pruned; if (unused == 0 || count == 0) return; - spin_lock(&dcache_lock); if (count >= unused) prune_ratio = 1; else @@ -589,11 +838,9 @@ static void prune_dcache(int count) if (down_read_trylock(&sb->s_umount)) { if ((sb->s_root != NULL) && (!list_empty(&sb->s_dentry_lru))) { - spin_unlock(&dcache_lock); __shrink_dcache_sb(sb, &w_count, DCACHE_REFERENCED); pruned -= w_count; - spin_lock(&dcache_lock); } up_read(&sb->s_umount); } @@ -609,7 +856,6 @@ static void prune_dcache(int count) if (p) __put_super(p); spin_unlock(&sb_lock); - spin_unlock(&dcache_lock); } /** @@ -623,12 +869,14 @@ void shrink_dcache_sb(struct super_block *sb) { LIST_HEAD(tmp); - spin_lock(&dcache_lock); + spin_lock(&dcache_lru_lock); while (!list_empty(&sb->s_dentry_lru)) { list_splice_init(&sb->s_dentry_lru, &tmp); + spin_unlock(&dcache_lru_lock); shrink_dentry_list(&tmp); + spin_lock(&dcache_lru_lock); } - spin_unlock(&dcache_lock); + spin_unlock(&dcache_lru_lock); } EXPORT_SYMBOL(shrink_dcache_sb); @@ -645,10 +893,10 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) BUG_ON(!IS_ROOT(dentry)); /* detach this root from the system */ - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); dentry_lru_del(dentry); __d_drop(dentry); - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); for (;;) { /* descend to the first leaf in the current subtree */ @@ -657,14 +905,16 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) /* this is a branch with children - detach all of them * from the system in one go */ - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); list_for_each_entry(loop, &dentry->d_subdirs, d_u.d_child) { + spin_lock_nested(&loop->d_lock, + DENTRY_D_LOCK_NESTED); dentry_lru_del(loop); __d_drop(loop); - cond_resched_lock(&dcache_lock); + spin_unlock(&loop->d_lock); } - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); /* move to the first child */ dentry = list_entry(dentry->d_subdirs.next, @@ -676,7 +926,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) do { struct inode *inode; - if (atomic_read(&dentry->d_count) != 0) { + if (dentry->d_count != 0) { printk(KERN_ERR "BUG: Dentry %p{i=%lx,n=%s}" " still in use (%d)" @@ -685,20 +935,23 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) dentry->d_inode ? dentry->d_inode->i_ino : 0UL, dentry->d_name.name, - atomic_read(&dentry->d_count), + dentry->d_count, dentry->d_sb->s_type->name, dentry->d_sb->s_id); BUG(); } - if (IS_ROOT(dentry)) + if (IS_ROOT(dentry)) { parent = NULL; - else { + list_del(&dentry->d_u.d_child); + } else { parent = dentry->d_parent; - atomic_dec(&parent->d_count); + spin_lock(&parent->d_lock); + parent->d_count--; + list_del(&dentry->d_u.d_child); + spin_unlock(&parent->d_lock); } - list_del(&dentry->d_u.d_child); detached++; inode = dentry->d_inode; @@ -728,8 +981,7 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry) /* * destroy the dentries attached to a superblock on unmounting - * - we don't need to use dentry->d_lock, and only need dcache_lock when - * removing the dentry from the system lists and hashes because: + * - we don't need to use dentry->d_lock because: * - the superblock is detached from all mountings and open files, so the * dentry trees will not be rearranged by the VFS * - s_umount is write-locked, so the memory pressure shrinker will ignore @@ -746,11 +998,13 @@ void shrink_dcache_for_umount(struct super_block *sb) dentry = sb->s_root; sb->s_root = NULL; - atomic_dec(&dentry->d_count); + spin_lock(&dentry->d_lock); + dentry->d_count--; + spin_unlock(&dentry->d_lock); shrink_dcache_for_umount_subtree(dentry); - while (!hlist_empty(&sb->s_anon)) { - dentry = hlist_entry(sb->s_anon.first, struct dentry, d_hash); + while (!hlist_bl_empty(&sb->s_anon)) { + dentry = hlist_bl_entry(hlist_bl_first(&sb->s_anon), struct dentry, d_hash); shrink_dcache_for_umount_subtree(dentry); } } @@ -768,15 +1022,20 @@ void shrink_dcache_for_umount(struct super_block *sb) * Return true if the parent or its subdirectories contain * a mount point */ - int have_submounts(struct dentry *parent) { - struct dentry *this_parent = parent; + struct dentry *this_parent; struct list_head *next; + unsigned seq; + int locked = 0; + + seq = read_seqbegin(&rename_lock); +again: + this_parent = parent; - spin_lock(&dcache_lock); if (d_mountpoint(parent)) goto positive; + spin_lock(&this_parent->d_lock); repeat: next = this_parent->d_subdirs.next; resume: @@ -784,27 +1043,65 @@ resume: struct list_head *tmp = next; struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; + + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); /* Have we found a mount point ? */ - if (d_mountpoint(dentry)) + if (d_mountpoint(dentry)) { + spin_unlock(&dentry->d_lock); + spin_unlock(&this_parent->d_lock); goto positive; + } if (!list_empty(&dentry->d_subdirs)) { + spin_unlock(&this_parent->d_lock); + spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_); this_parent = dentry; + spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_); goto repeat; } + spin_unlock(&dentry->d_lock); } /* * All done at this level ... ascend and resume the search. */ if (this_parent != parent) { - next = this_parent->d_u.d_child.next; - this_parent = this_parent->d_parent; + struct dentry *tmp; + struct dentry *child; + + tmp = this_parent->d_parent; + rcu_read_lock(); + spin_unlock(&this_parent->d_lock); + child = this_parent; + this_parent = tmp; + spin_lock(&this_parent->d_lock); + /* might go back up the wrong parent if we have had a rename + * or deletion */ + if (this_parent != child->d_parent || + (!locked && read_seqretry(&rename_lock, seq))) { + spin_unlock(&this_parent->d_lock); + rcu_read_unlock(); + goto rename_retry; + } + rcu_read_unlock(); + next = child->d_u.d_child.next; goto resume; } - spin_unlock(&dcache_lock); + spin_unlock(&this_parent->d_lock); + if (!locked && read_seqretry(&rename_lock, seq)) + goto rename_retry; + if (locked) + write_sequnlock(&rename_lock); return 0; /* No mount points found in tree */ positive: - spin_unlock(&dcache_lock); + if (!locked && read_seqretry(&rename_lock, seq)) + goto rename_retry; + if (locked) + write_sequnlock(&rename_lock); return 1; + +rename_retry: + locked = 1; + write_seqlock(&rename_lock); + goto again; } EXPORT_SYMBOL(have_submounts); @@ -824,11 +1121,16 @@ EXPORT_SYMBOL(have_submounts); */ static int select_parent(struct dentry * parent) { - struct dentry *this_parent = parent; + struct dentry *this_parent; struct list_head *next; + unsigned seq; int found = 0; + int locked = 0; - spin_lock(&dcache_lock); + seq = read_seqbegin(&rename_lock); +again: + this_parent = parent; + spin_lock(&this_parent->d_lock); repeat: next = this_parent->d_subdirs.next; resume: @@ -837,11 +1139,13 @@ resume: struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); + /* * move only zero ref count dentries to the end * of the unused list for prune_dcache */ - if (!atomic_read(&dentry->d_count)) { + if (!dentry->d_count) { dentry_lru_move_tail(dentry); found++; } else { @@ -853,28 +1157,63 @@ resume: * ensures forward progress). We'll be coming back to find * the rest. */ - if (found && need_resched()) + if (found && need_resched()) { + spin_unlock(&dentry->d_lock); goto out; + } /* * Descend a level if the d_subdirs list is non-empty. */ if (!list_empty(&dentry->d_subdirs)) { + spin_unlock(&this_parent->d_lock); + spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_); this_parent = dentry; + spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_); goto repeat; } + + spin_unlock(&dentry->d_lock); } /* * All done at this level ... ascend and resume the search. */ if (this_parent != parent) { - next = this_parent->d_u.d_child.next; - this_parent = this_parent->d_parent; + struct dentry *tmp; + struct dentry *child; + + tmp = this_parent->d_parent; + rcu_read_lock(); + spin_unlock(&this_parent->d_lock); + child = this_parent; + this_parent = tmp; + spin_lock(&this_parent->d_lock); + /* might go back up the wrong parent if we have had a rename + * or deletion */ + if (this_parent != child->d_parent || + (!locked && read_seqretry(&rename_lock, seq))) { + spin_unlock(&this_parent->d_lock); + rcu_read_unlock(); + goto rename_retry; + } + rcu_read_unlock(); + next = child->d_u.d_child.next; goto resume; } out: - spin_unlock(&dcache_lock); + spin_unlock(&this_parent->d_lock); + if (!locked && read_seqretry(&rename_lock, seq)) + goto rename_retry; + if (locked) + write_sequnlock(&rename_lock); return found; + +rename_retry: + if (found) + return found; + locked = 1; + write_seqlock(&rename_lock); + goto again; } /** @@ -908,16 +1247,13 @@ EXPORT_SYMBOL(shrink_dcache_parent); */ static int shrink_dcache_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask) { - int nr_unused; - if (nr) { if (!(gfp_mask & __GFP_FS)) return -1; prune_dcache(nr); } - nr_unused = percpu_counter_sum_positive(&nr_dentry_unused); - return (nr_unused / 100) * sysctl_vfs_cache_pressure; + return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure; } static struct shrinker dcache_shrinker = { @@ -960,38 +1296,52 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) memcpy(dname, name->name, name->len); dname[name->len] = 0; - atomic_set(&dentry->d_count, 1); + dentry->d_count = 1; dentry->d_flags = DCACHE_UNHASHED; spin_lock_init(&dentry->d_lock); + seqcount_init(&dentry->d_seq); dentry->d_inode = NULL; dentry->d_parent = NULL; dentry->d_sb = NULL; dentry->d_op = NULL; dentry->d_fsdata = NULL; - dentry->d_mounted = 0; - INIT_HLIST_NODE(&dentry->d_hash); + INIT_HLIST_BL_NODE(&dentry->d_hash); INIT_LIST_HEAD(&dentry->d_lru); INIT_LIST_HEAD(&dentry->d_subdirs); INIT_LIST_HEAD(&dentry->d_alias); + INIT_LIST_HEAD(&dentry->d_u.d_child); if (parent) { - dentry->d_parent = dget(parent); + spin_lock(&parent->d_lock); + /* + * don't need child lock because it is not subject + * to concurrency here + */ + __dget_dlock(parent); + dentry->d_parent = parent; dentry->d_sb = parent->d_sb; - } else { - INIT_LIST_HEAD(&dentry->d_u.d_child); - } - - spin_lock(&dcache_lock); - if (parent) list_add(&dentry->d_u.d_child, &parent->d_subdirs); - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); + } - percpu_counter_inc(&nr_dentry); + this_cpu_inc(nr_dentry); return dentry; } EXPORT_SYMBOL(d_alloc); +struct dentry *d_alloc_pseudo(struct super_block *sb, const struct qstr *name) +{ + struct dentry *dentry = d_alloc(NULL, name); + if (dentry) { + dentry->d_sb = sb; + dentry->d_parent = dentry; + dentry->d_flags |= DCACHE_DISCONNECTED; + } + return dentry; +} +EXPORT_SYMBOL(d_alloc_pseudo); + struct dentry *d_alloc_name(struct dentry *parent, const char *name) { struct qstr q; @@ -1003,12 +1353,36 @@ struct dentry *d_alloc_name(struct dentry *parent, const char *name) } EXPORT_SYMBOL(d_alloc_name); -/* the caller must hold dcache_lock */ +void d_set_d_op(struct dentry *dentry, const struct dentry_operations *op) +{ + BUG_ON(dentry->d_op); + BUG_ON(dentry->d_flags & (DCACHE_OP_HASH | + DCACHE_OP_COMPARE | + DCACHE_OP_REVALIDATE | + DCACHE_OP_DELETE )); + dentry->d_op = op; + if (!op) + return; + if (op->d_hash) + dentry->d_flags |= DCACHE_OP_HASH; + if (op->d_compare) + dentry->d_flags |= DCACHE_OP_COMPARE; + if (op->d_revalidate) + dentry->d_flags |= DCACHE_OP_REVALIDATE; + if (op->d_delete) + dentry->d_flags |= DCACHE_OP_DELETE; + +} +EXPORT_SYMBOL(d_set_d_op); + static void __d_instantiate(struct dentry *dentry, struct inode *inode) { + spin_lock(&dentry->d_lock); if (inode) list_add(&dentry->d_alias, &inode->i_dentry); dentry->d_inode = inode; + dentry_rcuwalk_barrier(dentry); + spin_unlock(&dentry->d_lock); fsnotify_d_instantiate(dentry, inode); } @@ -1030,9 +1404,11 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode) void d_instantiate(struct dentry *entry, struct inode * inode) { BUG_ON(!list_empty(&entry->d_alias)); - spin_lock(&dcache_lock); + if (inode) + spin_lock(&inode->i_lock); __d_instantiate(entry, inode); - spin_unlock(&dcache_lock); + if (inode) + spin_unlock(&inode->i_lock); security_d_instantiate(entry, inode); } EXPORT_SYMBOL(d_instantiate); @@ -1069,15 +1445,18 @@ static struct dentry *__d_instantiate_unique(struct dentry *entry, list_for_each_entry(alias, &inode->i_dentry, d_alias) { struct qstr *qstr = &alias->d_name; + /* + * Don't need alias->d_lock here, because aliases with + * d_parent == entry->d_parent are not subject to name or + * parent changes, because the parent inode i_mutex is held. + */ if (qstr->hash != hash) continue; if (alias->d_parent != entry->d_parent) continue; - if (qstr->len != len) + if (dentry_cmp(qstr->name, qstr->len, name, len)) continue; - if (memcmp(qstr->name, name, len)) - continue; - dget_locked(alias); + __dget(alias); return alias; } @@ -1091,9 +1470,11 @@ struct dentry *d_instantiate_unique(struct dentry *entry, struct inode *inode) BUG_ON(!list_empty(&entry->d_alias)); - spin_lock(&dcache_lock); + if (inode) + spin_lock(&inode->i_lock); result = __d_instantiate_unique(entry, inode); - spin_unlock(&dcache_lock); + if (inode) + spin_unlock(&inode->i_lock); if (!result) { security_d_instantiate(entry, inode); @@ -1134,14 +1515,6 @@ struct dentry * d_alloc_root(struct inode * root_inode) } EXPORT_SYMBOL(d_alloc_root); -static inline struct hlist_head *d_hash(struct dentry *parent, - unsigned long hash) -{ - hash += ((unsigned long) parent ^ GOLDEN_RATIO_PRIME) / L1_CACHE_BYTES; - hash = hash ^ ((hash ^ GOLDEN_RATIO_PRIME) >> D_HASHBITS); - return dentry_hashtable + (hash & D_HASHMASK); -} - /** * d_obtain_alias - find or allocate a dentry for a given inode * @inode: inode to allocate the dentry for @@ -1182,10 +1555,11 @@ struct dentry *d_obtain_alias(struct inode *inode) } tmp->d_parent = tmp; /* make sure dput doesn't croak */ - spin_lock(&dcache_lock); + + spin_lock(&inode->i_lock); res = __d_find_alias(inode, 0); if (res) { - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); dput(tmp); goto out_iput; } @@ -1195,12 +1569,14 @@ struct dentry *d_obtain_alias(struct inode *inode) tmp->d_sb = inode->i_sb; tmp->d_inode = inode; tmp->d_flags |= DCACHE_DISCONNECTED; - tmp->d_flags &= ~DCACHE_UNHASHED; list_add(&tmp->d_alias, &inode->i_dentry); - hlist_add_head(&tmp->d_hash, &inode->i_sb->s_anon); + bit_spin_lock(0, (unsigned long *)&tmp->d_sb->s_anon.first); + tmp->d_flags &= ~DCACHE_UNHASHED; + hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon); + __bit_spin_unlock(0, (unsigned long *)&tmp->d_sb->s_anon.first); spin_unlock(&tmp->d_lock); + spin_unlock(&inode->i_lock); - spin_unlock(&dcache_lock); return tmp; out_iput: @@ -1230,18 +1606,18 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry) struct dentry *new = NULL; if (inode && S_ISDIR(inode->i_mode)) { - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); new = __d_find_alias(inode, 1); if (new) { BUG_ON(!(new->d_flags & DCACHE_DISCONNECTED)); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); security_d_instantiate(new, inode); d_move(new, dentry); iput(inode); } else { - /* already taking dcache_lock, so d_add() by hand */ + /* already taking inode->i_lock, so d_add() by hand */ __d_instantiate(dentry, inode); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); security_d_instantiate(dentry, inode); d_rehash(dentry); } @@ -1314,10 +1690,10 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode, * Negative dentry: instantiate it unless the inode is a directory and * already has a dentry. */ - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); if (!S_ISDIR(inode->i_mode) || list_empty(&inode->i_dentry)) { __d_instantiate(found, inode); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); security_d_instantiate(found, inode); return found; } @@ -1327,8 +1703,8 @@ struct dentry *d_add_ci(struct dentry *dentry, struct inode *inode, * reference to it, move it in place and use it. */ new = list_entry(inode->i_dentry.next, struct dentry, d_alias); - dget_locked(new); - spin_unlock(&dcache_lock); + __dget(new); + spin_unlock(&inode->i_lock); security_d_instantiate(found, inode); d_move(new, found); iput(inode); @@ -1342,6 +1718,112 @@ err_out: EXPORT_SYMBOL(d_add_ci); /** + * __d_lookup_rcu - search for a dentry (racy, store-free) + * @parent: parent dentry + * @name: qstr of name we wish to find + * @seq: returns d_seq value at the point where the dentry was found + * @inode: returns dentry->d_inode when the inode was found valid. + * Returns: dentry, or NULL + * + * __d_lookup_rcu is the dcache lookup function for rcu-walk name + * resolution (store-free path walking) design described in + * Documentation/filesystems/path-lookup.txt. + * + * This is not to be used outside core vfs. + * + * __d_lookup_rcu must only be used in rcu-walk mode, ie. with vfsmount lock + * held, and rcu_read_lock held. The returned dentry must not be stored into + * without taking d_lock and checking d_seq sequence count against @seq + * returned here. + * + * A refcount may be taken on the found dentry with the __d_rcu_to_refcount + * function. + * + * Alternatively, __d_lookup_rcu may be called again to look up the child of + * the returned dentry, so long as its parent's seqlock is checked after the + * child is looked up. Thus, an interlocking stepping of sequence lock checks + * is formed, giving integrity down the path walk. + */ +struct dentry *__d_lookup_rcu(struct dentry *parent, struct qstr *name, + unsigned *seq, struct inode **inode) +{ + unsigned int len = name->len; + unsigned int hash = name->hash; + const unsigned char *str = name->name; + struct dcache_hash_bucket *b = d_hash(parent, hash); + struct hlist_bl_node *node; + struct dentry *dentry; + + /* + * Note: There is significant duplication with __d_lookup_rcu which is + * required to prevent single threaded performance regressions + * especially on architectures where smp_rmb (in seqcounts) are costly. + * Keep the two functions in sync. + */ + + /* + * The hash list is protected using RCU. + * + * Carefully use d_seq when comparing a candidate dentry, to avoid + * races with d_move(). + * + * It is possible that concurrent renames can mess up our list + * walk here and result in missing our dentry, resulting in the + * false-negative result. d_lookup() protects against concurrent + * renames using rename_lock seqlock. + * + * See Documentation/vfs/dcache-locking.txt for more details. + */ + hlist_bl_for_each_entry_rcu(dentry, node, &b->head, d_hash) { + struct inode *i; + const char *tname; + int tlen; + + if (dentry->d_name.hash != hash) + continue; + +seqretry: + *seq = read_seqcount_begin(&dentry->d_seq); + if (dentry->d_parent != parent) + continue; + if (d_unhashed(dentry)) + continue; + tlen = dentry->d_name.len; + tname = dentry->d_name.name; + i = dentry->d_inode; + prefetch(tname); + if (i) + prefetch(i); + /* + * This seqcount check is required to ensure name and + * len are loaded atomically, so as not to walk off the + * edge of memory when walking. If we could load this + * atomically some other way, we could drop this check. + */ + if (read_seqcount_retry(&dentry->d_seq, *seq)) + goto seqretry; + if (parent->d_flags & DCACHE_OP_COMPARE) { + if (parent->d_op->d_compare(parent, *inode, + dentry, i, + tlen, tname, name)) + continue; + } else { + if (dentry_cmp(tname, tlen, str, len)) + continue; + } + /* + * No extra seqcount check is required after the name + * compare. The caller must perform a seqcount check in + * order to do anything useful with the returned dentry + * anyway. + */ + *inode = i; + return dentry; + } + return NULL; +} + +/** * d_lookup - search for a dentry * @parent: parent dentry * @name: qstr of name we wish to find @@ -1352,10 +1834,10 @@ EXPORT_SYMBOL(d_add_ci); * dentry is returned. The caller must use dput to free the entry when it has * finished using it. %NULL is returned if the dentry does not exist. */ -struct dentry * d_lookup(struct dentry * parent, struct qstr * name) +struct dentry *d_lookup(struct dentry *parent, struct qstr *name) { - struct dentry * dentry = NULL; - unsigned long seq; + struct dentry *dentry; + unsigned seq; do { seq = read_seqbegin(&rename_lock); @@ -1367,7 +1849,7 @@ struct dentry * d_lookup(struct dentry * parent, struct qstr * name) } EXPORT_SYMBOL(d_lookup); -/* +/** * __d_lookup - search for a dentry (racy) * @parent: parent dentry * @name: qstr of name we wish to find @@ -1382,17 +1864,24 @@ EXPORT_SYMBOL(d_lookup); * * __d_lookup callers must be commented. */ -struct dentry * __d_lookup(struct dentry * parent, struct qstr * name) +struct dentry *__d_lookup(struct dentry *parent, struct qstr *name) { unsigned int len = name->len; unsigned int hash = name->hash; const unsigned char *str = name->name; - struct hlist_head *head = d_hash(parent,hash); + struct dcache_hash_bucket *b = d_hash(parent, hash); + struct hlist_bl_node *node; struct dentry *found = NULL; - struct hlist_node *node; struct dentry *dentry; /* + * Note: There is significant duplication with __d_lookup_rcu which is + * required to prevent single threaded performance regressions + * especially on architectures where smp_rmb (in seqcounts) are costly. + * Keep the two functions in sync. + */ + + /* * The hash list is protected using RCU. * * Take d_lock when comparing a candidate dentry, to avoid races @@ -1407,25 +1896,16 @@ struct dentry * __d_lookup(struct dentry * parent, struct qstr * name) */ rcu_read_lock(); - hlist_for_each_entry_rcu(dentry, node, head, d_hash) { - struct qstr *qstr; + hlist_bl_for_each_entry_rcu(dentry, node, &b->head, d_hash) { + const char *tname; + int tlen; if (dentry->d_name.hash != hash) continue; - if (dentry->d_parent != parent) - continue; spin_lock(&dentry->d_lock); - - /* - * Recheck the dentry after taking the lock - d_move may have - * changed things. Don't bother checking the hash because - * we're about to compare the whole name anyway. - */ if (dentry->d_parent != parent) goto next; - - /* non-existing due to RCU? */ if (d_unhashed(dentry)) goto next; @@ -1433,18 +1913,19 @@ struct dentry * __d_lookup(struct dentry * parent, struct qstr * name) * It is safe to compare names since d_move() cannot * change the qstr (protected by d_lock). */ - qstr = &dentry->d_name; - if (parent->d_op && parent->d_op->d_compare) { - if (parent->d_op->d_compare(parent, qstr, name)) + tlen = dentry->d_name.len; + tname = dentry->d_name.name; + if (parent->d_flags & DCACHE_OP_COMPARE) { + if (parent->d_op->d_compare(parent, parent->d_inode, + dentry, dentry->d_inode, + tlen, tname, name)) goto next; } else { - if (qstr->len != len) - goto next; - if (memcmp(qstr->name, str, len)) + if (dentry_cmp(tname, tlen, str, len)) goto next; } - atomic_inc(&dentry->d_count); + dentry->d_count++; found = dentry; spin_unlock(&dentry->d_lock); break; @@ -1473,8 +1954,8 @@ struct dentry *d_hash_and_lookup(struct dentry *dir, struct qstr *name) * routine may choose to leave the hash value unchanged. */ name->hash = full_name_hash(name->name, name->len); - if (dir->d_op && dir->d_op->d_hash) { - if (dir->d_op->d_hash(dir, name) < 0) + if (dir->d_flags & DCACHE_OP_HASH) { + if (dir->d_op->d_hash(dir, dir->d_inode, name) < 0) goto out; } dentry = d_lookup(dir, name); @@ -1483,34 +1964,32 @@ out: } /** - * d_validate - verify dentry provided from insecure source + * d_validate - verify dentry provided from insecure source (deprecated) * @dentry: The dentry alleged to be valid child of @dparent * @dparent: The parent dentry (known to be valid) * * An insecure source has sent us a dentry, here we verify it and dget() it. * This is used by ncpfs in its readdir implementation. * Zero is returned in the dentry is invalid. + * + * This function is slow for big directories, and deprecated, do not use it. */ -int d_validate(struct dentry *dentry, struct dentry *parent) +int d_validate(struct dentry *dentry, struct dentry *dparent) { - struct hlist_head *head = d_hash(parent, dentry->d_name.hash); - struct hlist_node *node; - struct dentry *d; - - /* Check whether the ptr might be valid at all.. */ - if (!kmem_ptr_validate(dentry_cache, dentry)) - return 0; - if (dentry->d_parent != parent) - return 0; + struct dentry *child; - rcu_read_lock(); - hlist_for_each_entry_rcu(d, node, head, d_hash) { - if (d == dentry) { - dget(dentry); + spin_lock(&dparent->d_lock); + list_for_each_entry(child, &dparent->d_subdirs, d_u.d_child) { + if (dentry == child) { + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); + __dget_dlock(dentry); + spin_unlock(&dentry->d_lock); + spin_unlock(&dparent->d_lock); return 1; } } - rcu_read_unlock(); + spin_unlock(&dparent->d_lock); + return 0; } EXPORT_SYMBOL(d_validate); @@ -1538,16 +2017,23 @@ EXPORT_SYMBOL(d_validate); void d_delete(struct dentry * dentry) { + struct inode *inode; int isdir = 0; /* * Are we the only user? */ - spin_lock(&dcache_lock); +again: spin_lock(&dentry->d_lock); - isdir = S_ISDIR(dentry->d_inode->i_mode); - if (atomic_read(&dentry->d_count) == 1) { + inode = dentry->d_inode; + isdir = S_ISDIR(inode->i_mode); + if (dentry->d_count == 1) { + if (inode && !spin_trylock(&inode->i_lock)) { + spin_unlock(&dentry->d_lock); + cpu_relax(); + goto again; + } dentry->d_flags &= ~DCACHE_CANT_MOUNT; - dentry_iput(dentry); + dentry_unlink_inode(dentry); fsnotify_nameremove(dentry, isdir); return; } @@ -1556,17 +2042,18 @@ void d_delete(struct dentry * dentry) __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); fsnotify_nameremove(dentry, isdir); } EXPORT_SYMBOL(d_delete); -static void __d_rehash(struct dentry * entry, struct hlist_head *list) +static void __d_rehash(struct dentry * entry, struct dcache_hash_bucket *b) { - + BUG_ON(!d_unhashed(entry)); + spin_lock_bucket(b); entry->d_flags &= ~DCACHE_UNHASHED; - hlist_add_head_rcu(&entry->d_hash, list); + hlist_bl_add_head_rcu(&entry->d_hash, &b->head); + spin_unlock_bucket(b); } static void _d_rehash(struct dentry * entry) @@ -1583,25 +2070,39 @@ static void _d_rehash(struct dentry * entry) void d_rehash(struct dentry * entry) { - spin_lock(&dcache_lock); spin_lock(&entry->d_lock); _d_rehash(entry); spin_unlock(&entry->d_lock); - spin_unlock(&dcache_lock); } EXPORT_SYMBOL(d_rehash); -/* - * When switching names, the actual string doesn't strictly have to - * be preserved in the target - because we're dropping the target - * anyway. As such, we can just do a simple memcpy() to copy over - * the new name before we switch. +/** + * dentry_update_name_case - update case insensitive dentry with a new name + * @dentry: dentry to be updated + * @name: new name * - * Note that we have to be a lot more careful about getting the hash - * switched - we have to switch the hash value properly even if it - * then no longer matches the actual (corrupted) string of the target. - * The hash value has to match the hash queue that the dentry is on.. + * Update a case insensitive dentry with new case of name. + * + * dentry must have been returned by d_lookup with name @name. Old and new + * name lengths must match (ie. no d_compare which allows mismatched name + * lengths). + * + * Parent inode i_mutex must be held over d_lookup and into this call (to + * keep renames and concurrent inserts, and readdir(2) away). */ +void dentry_update_name_case(struct dentry *dentry, struct qstr *name) +{ + BUG_ON(!mutex_is_locked(&dentry->d_inode->i_mutex)); + BUG_ON(dentry->d_name.len != name->len); /* d_lookup gives this */ + + spin_lock(&dentry->d_lock); + write_seqcount_begin(&dentry->d_seq); + memcpy((unsigned char *)dentry->d_name.name, name->name, name->len); + write_seqcount_end(&dentry->d_seq); + spin_unlock(&dentry->d_lock); +} +EXPORT_SYMBOL(dentry_update_name_case); + static void switch_names(struct dentry *dentry, struct dentry *target) { if (dname_external(target)) { @@ -1643,54 +2144,84 @@ static void switch_names(struct dentry *dentry, struct dentry *target) swap(dentry->d_name.len, target->d_name.len); } +static void dentry_lock_for_move(struct dentry *dentry, struct dentry *target) +{ + /* + * XXXX: do we really need to take target->d_lock? + */ + if (IS_ROOT(dentry) || dentry->d_parent == target->d_parent) + spin_lock(&target->d_parent->d_lock); + else { + if (d_ancestor(dentry->d_parent, target->d_parent)) { + spin_lock(&dentry->d_parent->d_lock); + spin_lock_nested(&target->d_parent->d_lock, + DENTRY_D_LOCK_NESTED); + } else { + spin_lock(&target->d_parent->d_lock); + spin_lock_nested(&dentry->d_parent->d_lock, + DENTRY_D_LOCK_NESTED); + } + } + if (target < dentry) { + spin_lock_nested(&target->d_lock, 2); + spin_lock_nested(&dentry->d_lock, 3); + } else { + spin_lock_nested(&dentry->d_lock, 2); + spin_lock_nested(&target->d_lock, 3); + } +} + +static void dentry_unlock_parents_for_move(struct dentry *dentry, + struct dentry *target) +{ + if (target->d_parent != dentry->d_parent) + spin_unlock(&dentry->d_parent->d_lock); + if (target->d_parent != target) + spin_unlock(&target->d_parent->d_lock); +} + /* - * We cannibalize "target" when moving dentry on top of it, - * because it's going to be thrown away anyway. We could be more - * polite about it, though. - * - * This forceful removal will result in ugly /proc output if - * somebody holds a file open that got deleted due to a rename. - * We could be nicer about the deleted file, and let it show - * up under the name it had before it was deleted rather than - * under the original name of the file that was moved on top of it. + * When switching names, the actual string doesn't strictly have to + * be preserved in the target - because we're dropping the target + * anyway. As such, we can just do a simple memcpy() to copy over + * the new name before we switch. + * + * Note that we have to be a lot more careful about getting the hash + * switched - we have to switch the hash value properly even if it + * then no longer matches the actual (corrupted) string of the target. + * The hash value has to match the hash queue that the dentry is on.. */ - /* - * d_move_locked - move a dentry + * d_move - move a dentry * @dentry: entry to move * @target: new dentry * * Update the dcache to reflect the move of a file name. Negative * dcache entries should not be moved in this way. */ -static void d_move_locked(struct dentry * dentry, struct dentry * target) +void d_move(struct dentry * dentry, struct dentry * target) { - struct hlist_head *list; - if (!dentry->d_inode) printk(KERN_WARNING "VFS: moving negative dcache entry\n"); + BUG_ON(d_ancestor(dentry, target)); + BUG_ON(d_ancestor(target, dentry)); + write_seqlock(&rename_lock); - /* - * XXXX: do we really need to take target->d_lock? - */ - if (target < dentry) { - spin_lock(&target->d_lock); - spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); - } else { - spin_lock(&dentry->d_lock); - spin_lock_nested(&target->d_lock, DENTRY_D_LOCK_NESTED); - } - /* Move the dentry to the target hash queue, if on different bucket */ - if (d_unhashed(dentry)) - goto already_unhashed; + dentry_lock_for_move(dentry, target); - hlist_del_rcu(&dentry->d_hash); + write_seqcount_begin(&dentry->d_seq); + write_seqcount_begin(&target->d_seq); -already_unhashed: - list = d_hash(target->d_parent, target->d_name.hash); - __d_rehash(dentry, list); + /* __d_drop does write_seqcount_barrier, but they're OK to nest. */ + + /* + * Move the dentry to the target hash queue. Don't bother checking + * for the same hash queue because of how unlikely it is. + */ + __d_drop(dentry); + __d_rehash(dentry, d_hash(target->d_parent, target->d_name.hash)); /* Unhash the target: dput() will then get rid of it */ __d_drop(target); @@ -1715,27 +2246,16 @@ already_unhashed: } list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs); + + write_seqcount_end(&target->d_seq); + write_seqcount_end(&dentry->d_seq); + + dentry_unlock_parents_for_move(dentry, target); spin_unlock(&target->d_lock); fsnotify_d_move(dentry); spin_unlock(&dentry->d_lock); write_sequnlock(&rename_lock); } - -/** - * d_move - move a dentry - * @dentry: entry to move - * @target: new dentry - * - * Update the dcache to reflect the move of a file name. Negative - * dcache entries should not be moved in this way. - */ - -void d_move(struct dentry * dentry, struct dentry * target) -{ - spin_lock(&dcache_lock); - d_move_locked(dentry, target); - spin_unlock(&dcache_lock); -} EXPORT_SYMBOL(d_move); /** @@ -1761,13 +2281,13 @@ struct dentry *d_ancestor(struct dentry *p1, struct dentry *p2) * This helper attempts to cope with remotely renamed directories * * It assumes that the caller is already holding - * dentry->d_parent->d_inode->i_mutex and the dcache_lock + * dentry->d_parent->d_inode->i_mutex and the inode->i_lock * * Note: If ever the locking in lock_rename() changes, then please * remember to update this too... */ -static struct dentry *__d_unalias(struct dentry *dentry, struct dentry *alias) - __releases(dcache_lock) +static struct dentry *__d_unalias(struct inode *inode, + struct dentry *dentry, struct dentry *alias) { struct mutex *m1 = NULL, *m2 = NULL; struct dentry *ret; @@ -1790,10 +2310,10 @@ static struct dentry *__d_unalias(struct dentry *dentry, struct dentry *alias) goto out_err; m2 = &alias->d_parent->d_inode->i_mutex; out_unalias: - d_move_locked(alias, dentry); + d_move(alias, dentry); ret = alias; out_err: - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); if (m2) mutex_unlock(m2); if (m1) @@ -1804,17 +2324,23 @@ out_err: /* * Prepare an anonymous dentry for life in the superblock's dentry tree as a * named dentry in place of the dentry to be replaced. + * returns with anon->d_lock held! */ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon) { struct dentry *dparent, *aparent; - switch_names(dentry, anon); - swap(dentry->d_name.hash, anon->d_name.hash); + dentry_lock_for_move(anon, dentry); + + write_seqcount_begin(&dentry->d_seq); + write_seqcount_begin(&anon->d_seq); dparent = dentry->d_parent; aparent = anon->d_parent; + switch_names(dentry, anon); + swap(dentry->d_name.hash, anon->d_name.hash); + dentry->d_parent = (aparent == anon) ? dentry : aparent; list_del(&dentry->d_u.d_child); if (!IS_ROOT(dentry)) @@ -1829,6 +2355,13 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon) else INIT_LIST_HEAD(&anon->d_u.d_child); + write_seqcount_end(&dentry->d_seq); + write_seqcount_end(&anon->d_seq); + + dentry_unlock_parents_for_move(anon, dentry); + spin_unlock(&dentry->d_lock); + + /* anon->d_lock still locked, returns locked */ anon->d_flags &= ~DCACHE_DISCONNECTED; } @@ -1846,14 +2379,15 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode) BUG_ON(!d_unhashed(dentry)); - spin_lock(&dcache_lock); - if (!inode) { actual = dentry; __d_instantiate(dentry, NULL); - goto found_lock; + d_rehash(actual); + goto out_nolock; } + spin_lock(&inode->i_lock); + if (S_ISDIR(inode->i_mode)) { struct dentry *alias; @@ -1864,13 +2398,12 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode) /* Is this an anonymous mountpoint that we could splice * into our tree? */ if (IS_ROOT(alias)) { - spin_lock(&alias->d_lock); __d_materialise_dentry(dentry, alias); __d_drop(alias); goto found; } /* Nope, but we must(!) avoid directory aliasing */ - actual = __d_unalias(dentry, alias); + actual = __d_unalias(inode, dentry, alias); if (IS_ERR(actual)) dput(alias); goto out_nolock; @@ -1881,15 +2414,14 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode) actual = __d_instantiate_unique(dentry, inode); if (!actual) actual = dentry; - else if (unlikely(!d_unhashed(actual))) - goto shouldnt_be_hashed; + else + BUG_ON(!d_unhashed(actual)); -found_lock: spin_lock(&actual->d_lock); found: _d_rehash(actual); spin_unlock(&actual->d_lock); - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); out_nolock: if (actual == dentry) { security_d_instantiate(dentry, inode); @@ -1898,10 +2430,6 @@ out_nolock: iput(inode); return actual; - -shouldnt_be_hashed: - spin_unlock(&dcache_lock); - BUG(); } EXPORT_SYMBOL_GPL(d_materialise_unique); @@ -1928,7 +2456,7 @@ static int prepend_name(char **buffer, int *buflen, struct qstr *name) * @buffer: pointer to the end of the buffer * @buflen: pointer to buffer length * - * Caller holds the dcache_lock. + * Caller holds the rename_lock. * * If path is not reachable from the supplied root, then the value of * root is changed (without modifying refcounts). @@ -1956,7 +2484,9 @@ static int prepend_path(const struct path *path, struct path *root, } parent = dentry->d_parent; prefetch(parent); + spin_lock(&dentry->d_lock); error = prepend_name(buffer, buflen, &dentry->d_name); + spin_unlock(&dentry->d_lock); if (!error) error = prepend(buffer, buflen, "/", 1); if (error) @@ -2012,9 +2542,9 @@ char *__d_path(const struct path *path, struct path *root, int error; prepend(&res, &buflen, "\0", 1); - spin_lock(&dcache_lock); + write_seqlock(&rename_lock); error = prepend_path(path, root, &res, &buflen); - spin_unlock(&dcache_lock); + write_sequnlock(&rename_lock); if (error) return ERR_PTR(error); @@ -2076,12 +2606,12 @@ char *d_path(const struct path *path, char *buf, int buflen) return path->dentry->d_op->d_dname(path->dentry, buf, buflen); get_fs_root(current->fs, &root); - spin_lock(&dcache_lock); + write_seqlock(&rename_lock); tmp = root; error = path_with_deleted(path, &tmp, &res, &buflen); if (error) res = ERR_PTR(error); - spin_unlock(&dcache_lock); + write_sequnlock(&rename_lock); path_put(&root); return res; } @@ -2107,12 +2637,12 @@ char *d_path_with_unreachable(const struct path *path, char *buf, int buflen) return path->dentry->d_op->d_dname(path->dentry, buf, buflen); get_fs_root(current->fs, &root); - spin_lock(&dcache_lock); + write_seqlock(&rename_lock); tmp = root; error = path_with_deleted(path, &tmp, &res, &buflen); if (!error && !path_equal(&tmp, &root)) error = prepend_unreachable(&res, &buflen); - spin_unlock(&dcache_lock); + write_sequnlock(&rename_lock); path_put(&root); if (error) res = ERR_PTR(error); @@ -2144,7 +2674,7 @@ char *dynamic_dname(struct dentry *dentry, char *buffer, int buflen, /* * Write full pathname from the root of the filesystem into the buffer. */ -char *__dentry_path(struct dentry *dentry, char *buf, int buflen) +static char *__dentry_path(struct dentry *dentry, char *buf, int buflen) { char *end = buf + buflen; char *retval; @@ -2158,10 +2688,13 @@ char *__dentry_path(struct dentry *dentry, char *buf, int buflen) while (!IS_ROOT(dentry)) { struct dentry *parent = dentry->d_parent; + int error; prefetch(parent); - if ((prepend_name(&end, &buflen, &dentry->d_name) != 0) || - (prepend(&end, &buflen, "/", 1) != 0)) + spin_lock(&dentry->d_lock); + error = prepend_name(&end, &buflen, &dentry->d_name); + spin_unlock(&dentry->d_lock); + if (error != 0 || prepend(&end, &buflen, "/", 1) != 0) goto Elong; retval = end; @@ -2171,14 +2704,25 @@ char *__dentry_path(struct dentry *dentry, char *buf, int buflen) Elong: return ERR_PTR(-ENAMETOOLONG); } -EXPORT_SYMBOL(__dentry_path); + +char *dentry_path_raw(struct dentry *dentry, char *buf, int buflen) +{ + char *retval; + + write_seqlock(&rename_lock); + retval = __dentry_path(dentry, buf, buflen); + write_sequnlock(&rename_lock); + + return retval; +} +EXPORT_SYMBOL(dentry_path_raw); char *dentry_path(struct dentry *dentry, char *buf, int buflen) { char *p = NULL; char *retval; - spin_lock(&dcache_lock); + write_seqlock(&rename_lock); if (d_unlinked(dentry)) { p = buf + buflen; if (prepend(&p, &buflen, "//deleted", 10) != 0) @@ -2186,12 +2730,11 @@ char *dentry_path(struct dentry *dentry, char *buf, int buflen) buflen++; } retval = __dentry_path(dentry, buf, buflen); - spin_unlock(&dcache_lock); + write_sequnlock(&rename_lock); if (!IS_ERR(retval) && p) *p = '/'; /* restore '/' overriden with '\0' */ return retval; Elong: - spin_unlock(&dcache_lock); return ERR_PTR(-ENAMETOOLONG); } @@ -2225,7 +2768,7 @@ SYSCALL_DEFINE2(getcwd, char __user *, buf, unsigned long, size) get_fs_root_and_pwd(current->fs, &root, &pwd); error = -ENOENT; - spin_lock(&dcache_lock); + write_seqlock(&rename_lock); if (!d_unlinked(pwd.dentry)) { unsigned long len; struct path tmp = root; @@ -2234,7 +2777,7 @@ SYSCALL_DEFINE2(getcwd, char __user *, buf, unsigned long, size) prepend(&cwd, &buflen, "\0", 1); error = prepend_path(&pwd, &tmp, &cwd, &buflen); - spin_unlock(&dcache_lock); + write_sequnlock(&rename_lock); if (error) goto out; @@ -2253,8 +2796,9 @@ SYSCALL_DEFINE2(getcwd, char __user *, buf, unsigned long, size) if (copy_to_user(buf, cwd, len)) error = -EFAULT; } - } else - spin_unlock(&dcache_lock); + } else { + write_sequnlock(&rename_lock); + } out: path_put(&pwd); @@ -2282,25 +2826,25 @@ out: int is_subdir(struct dentry *new_dentry, struct dentry *old_dentry) { int result; - unsigned long seq; + unsigned seq; if (new_dentry == old_dentry) return 1; - /* - * Need rcu_readlock to protect against the d_parent trashing - * due to d_move - */ - rcu_read_lock(); do { /* for restarting inner loop in case of seq retry */ seq = read_seqbegin(&rename_lock); + /* + * Need rcu_readlock to protect against the d_parent trashing + * due to d_move + */ + rcu_read_lock(); if (d_ancestor(old_dentry, new_dentry)) result = 1; else result = 0; + rcu_read_unlock(); } while (read_seqretry(&rename_lock, seq)); - rcu_read_unlock(); return result; } @@ -2332,10 +2876,15 @@ EXPORT_SYMBOL(path_is_under); void d_genocide(struct dentry *root) { - struct dentry *this_parent = root; + struct dentry *this_parent; struct list_head *next; + unsigned seq; + int locked = 0; - spin_lock(&dcache_lock); + seq = read_seqbegin(&rename_lock); +again: + this_parent = root; + spin_lock(&this_parent->d_lock); repeat: next = this_parent->d_subdirs.next; resume: @@ -2343,21 +2892,62 @@ resume: struct list_head *tmp = next; struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child); next = tmp->next; - if (d_unhashed(dentry)||!dentry->d_inode) + + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); + if (d_unhashed(dentry) || !dentry->d_inode) { + spin_unlock(&dentry->d_lock); continue; + } if (!list_empty(&dentry->d_subdirs)) { + spin_unlock(&this_parent->d_lock); + spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_); this_parent = dentry; + spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_); goto repeat; } - atomic_dec(&dentry->d_count); + if (!(dentry->d_flags & DCACHE_GENOCIDE)) { + dentry->d_flags |= DCACHE_GENOCIDE; + dentry->d_count--; + } + spin_unlock(&dentry->d_lock); } if (this_parent != root) { - next = this_parent->d_u.d_child.next; - atomic_dec(&this_parent->d_count); - this_parent = this_parent->d_parent; + struct dentry *tmp; + struct dentry *child; + + tmp = this_parent->d_parent; + if (!(this_parent->d_flags & DCACHE_GENOCIDE)) { + this_parent->d_flags |= DCACHE_GENOCIDE; + this_parent->d_count--; + } + rcu_read_lock(); + spin_unlock(&this_parent->d_lock); + child = this_parent; + this_parent = tmp; + spin_lock(&this_parent->d_lock); + /* might go back up the wrong parent if we have had a rename + * or deletion */ + if (this_parent != child->d_parent || + (!locked && read_seqretry(&rename_lock, seq))) { + spin_unlock(&this_parent->d_lock); + rcu_read_unlock(); + goto rename_retry; + } + rcu_read_unlock(); + next = child->d_u.d_child.next; goto resume; } - spin_unlock(&dcache_lock); + spin_unlock(&this_parent->d_lock); + if (!locked && read_seqretry(&rename_lock, seq)) + goto rename_retry; + if (locked) + write_sequnlock(&rename_lock); + return; + +rename_retry: + locked = 1; + write_seqlock(&rename_lock); + goto again; } /** @@ -2411,7 +3001,7 @@ static void __init dcache_init_early(void) dentry_hashtable = alloc_large_system_hash("Dentry cache", - sizeof(struct hlist_head), + sizeof(struct dcache_hash_bucket), dhash_entries, 13, HASH_EARLY, @@ -2420,16 +3010,13 @@ static void __init dcache_init_early(void) 0); for (loop = 0; loop < (1 << d_hash_shift); loop++) - INIT_HLIST_HEAD(&dentry_hashtable[loop]); + INIT_HLIST_BL_HEAD(&dentry_hashtable[loop].head); } static void __init dcache_init(void) { int loop; - percpu_counter_init(&nr_dentry, 0); - percpu_counter_init(&nr_dentry_unused, 0); - /* * A constructor could be added for stable state like the lists, * but it is probably not worth it because of the cache nature @@ -2446,7 +3033,7 @@ static void __init dcache_init(void) dentry_hashtable = alloc_large_system_hash("Dentry cache", - sizeof(struct hlist_head), + sizeof(struct dcache_hash_bucket), dhash_entries, 13, 0, @@ -2455,7 +3042,7 @@ static void __init dcache_init(void) 0); for (loop = 0; loop < (1 << d_hash_shift); loop++) - INIT_HLIST_HEAD(&dentry_hashtable[loop]); + INIT_HLIST_BL_HEAD(&dentry_hashtable[loop].head); } /* SLAB cache for __getname() consumers */ diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index a4ed838..37a8ca7 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -135,17 +135,17 @@ static int debug_fill_super(struct super_block *sb, void *data, int silent) return simple_fill_super(sb, DEBUGFS_MAGIC, debug_files); } -static int debug_get_sb(struct file_system_type *fs_type, +static struct dentry *debug_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_single(fs_type, flags, data, debug_fill_super, mnt); + return mount_single(fs_type, flags, data, debug_fill_super); } static struct file_system_type debug_fs_type = { .owner = THIS_MODULE, .name = "debugfs", - .get_sb = debug_get_sb, + .mount = debug_mount, .kill_sb = kill_litter_super, }; diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index 8b3ffd5..1bb547c 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -331,7 +331,7 @@ static int compare_init_pts_sb(struct super_block *s, void *p) } /* - * devpts_get_sb() + * devpts_mount() * * If the '-o newinstance' mount option was specified, mount a new * (private) instance of devpts. PTYs created in this instance are @@ -345,20 +345,20 @@ static int compare_init_pts_sb(struct super_block *s, void *p) * semantics in devpts while preserving backward compatibility of the * current 'single-namespace' semantics. i.e all mounts of devpts * without the 'newinstance' mount option should bind to the initial - * kernel mount, like get_sb_single(). + * kernel mount, like mount_single(). * * Mounts with 'newinstance' option create a new, private namespace. * * NOTE: * - * For single-mount semantics, devpts cannot use get_sb_single(), - * because get_sb_single()/sget() find and use the super-block from + * For single-mount semantics, devpts cannot use mount_single(), + * because mount_single()/sget() find and use the super-block from * the most recent mount of devpts. But that recent mount may be a - * 'newinstance' mount and get_sb_single() would pick the newinstance + * 'newinstance' mount and mount_single() would pick the newinstance * super-block instead of the initial super-block. */ -static int devpts_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *devpts_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { int error; struct pts_mount_opts opts; @@ -366,7 +366,7 @@ static int devpts_get_sb(struct file_system_type *fs_type, error = parse_mount_options(data, PARSE_MOUNT, &opts); if (error) - return error; + return ERR_PTR(error); if (opts.newinstance) s = sget(fs_type, NULL, set_anon_super, NULL); @@ -374,7 +374,7 @@ static int devpts_get_sb(struct file_system_type *fs_type, s = sget(fs_type, compare_init_pts_sb, set_anon_super, NULL); if (IS_ERR(s)) - return PTR_ERR(s); + return ERR_CAST(s); if (!s->s_root) { s->s_flags = flags; @@ -390,13 +390,11 @@ static int devpts_get_sb(struct file_system_type *fs_type, if (error) goto out_undo_sget; - simple_set_mnt(mnt, s); - - return 0; + return dget(s->s_root); out_undo_sget: deactivate_locked_super(s); - return error; + return ERR_PTR(error); } #else @@ -404,10 +402,10 @@ out_undo_sget: * This supports only the legacy single-instance semantics (no * multiple-instance semantics) */ -static int devpts_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *devpts_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { - return get_sb_single(fs_type, flags, data, devpts_fill_super, mnt); + return mount_single(fs_type, flags, data, devpts_fill_super); } #endif @@ -421,7 +419,7 @@ static void devpts_kill_sb(struct super_block *sb) static struct file_system_type devpts_fs_type = { .name = "devpts", - .get_sb = devpts_get_sb, + .mount = devpts_mount, .kill_sb = devpts_kill_sb, }; diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c index 37a34c2..9c64ae9 100644 --- a/fs/dlm/lowcomms.c +++ b/fs/dlm/lowcomms.c @@ -63,6 +63,9 @@ #define NEEDED_RMEM (4*1024*1024) #define CONN_HASH_SIZE 32 +/* Number of messages to send before rescheduling */ +#define MAX_SEND_MSG_COUNT 25 + struct cbuf { unsigned int base; unsigned int len; @@ -108,6 +111,7 @@ struct connection { #define CF_INIT_PENDING 4 #define CF_IS_OTHERCON 5 #define CF_CLOSE 6 +#define CF_APP_LIMITED 7 struct list_head writequeue; /* List of outgoing writequeue_entries */ spinlock_t writequeue_lock; int (*rx_action) (struct connection *); /* What to do when active */ @@ -295,7 +299,17 @@ static void lowcomms_write_space(struct sock *sk) { struct connection *con = sock2con(sk); - if (con && !test_and_set_bit(CF_WRITE_PENDING, &con->flags)) + if (!con) + return; + + clear_bit(SOCK_NOSPACE, &con->sock->flags); + + if (test_and_clear_bit(CF_APP_LIMITED, &con->flags)) { + con->sock->sk->sk_write_pending--; + clear_bit(SOCK_ASYNC_NOSPACE, &con->sock->flags); + } + + if (!test_and_set_bit(CF_WRITE_PENDING, &con->flags)) queue_work(send_workqueue, &con->swork); } @@ -915,6 +929,7 @@ static void tcp_connect_to_sock(struct connection *con) struct sockaddr_storage saddr, src_addr; int addr_len; struct socket *sock = NULL; + int one = 1; if (con->nodeid == 0) { log_print("attempt to connect sock 0 foiled"); @@ -960,6 +975,11 @@ static void tcp_connect_to_sock(struct connection *con) make_sockaddr(&saddr, dlm_config.ci_tcp_port, &addr_len); log_print("connecting to %d", con->nodeid); + + /* Turn off Nagle's algorithm */ + kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, (char *)&one, + sizeof(one)); + result = sock->ops->connect(sock, (struct sockaddr *)&saddr, addr_len, O_NONBLOCK); @@ -1011,6 +1031,10 @@ static struct socket *tcp_create_listen_sock(struct connection *con, goto create_out; } + /* Turn off Nagle's algorithm */ + kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, (char *)&one, + sizeof(one)); + result = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one)); @@ -1297,6 +1321,7 @@ static void send_to_sock(struct connection *con) const int msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL; struct writequeue_entry *e; int len, offset; + int count = 0; mutex_lock(&con->sock_mutex); if (con->sock == NULL) @@ -1319,14 +1344,27 @@ static void send_to_sock(struct connection *con) ret = kernel_sendpage(con->sock, e->page, offset, len, msg_flags); if (ret == -EAGAIN || ret == 0) { + if (ret == -EAGAIN && + test_bit(SOCK_ASYNC_NOSPACE, &con->sock->flags) && + !test_and_set_bit(CF_APP_LIMITED, &con->flags)) { + /* Notify TCP that we're limited by the + * application window size. + */ + set_bit(SOCK_NOSPACE, &con->sock->flags); + con->sock->sk->sk_write_pending++; + } cond_resched(); goto out; } if (ret <= 0) goto send_error; } - /* Don't starve people filling buffers */ + + /* Don't starve people filling buffers */ + if (++count >= MAX_SEND_MSG_COUNT) { cond_resched(); + count = 0; + } spin_lock(&con->writequeue_lock); e->offset += ret; @@ -1430,20 +1468,19 @@ static void work_stop(void) static int work_start(void) { - int error; - recv_workqueue = create_workqueue("dlm_recv"); - error = IS_ERR(recv_workqueue); - if (error) { - log_print("can't start dlm_recv %d", error); - return error; + recv_workqueue = alloc_workqueue("dlm_recv", WQ_MEM_RECLAIM | + WQ_HIGHPRI | WQ_FREEZEABLE, 0); + if (!recv_workqueue) { + log_print("can't start dlm_recv"); + return -ENOMEM; } - send_workqueue = create_singlethread_workqueue("dlm_send"); - error = IS_ERR(send_workqueue); - if (error) { - log_print("can't start dlm_send %d", error); + send_workqueue = alloc_workqueue("dlm_send", WQ_MEM_RECLAIM | + WQ_HIGHPRI | WQ_FREEZEABLE, 0); + if (!send_workqueue) { + log_print("can't start dlm_send"); destroy_workqueue(recv_workqueue); - return error; + return -ENOMEM; } return 0; diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c index 906e803..6fc4f31 100644 --- a/fs/ecryptfs/dentry.c +++ b/fs/ecryptfs/dentry.c @@ -44,12 +44,17 @@ */ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct dentry *lower_dentry = ecryptfs_dentry_to_lower(dentry); - struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); + struct dentry *lower_dentry; + struct vfsmount *lower_mnt; struct dentry *dentry_save; struct vfsmount *vfsmount_save; int rc = 1; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + lower_dentry = ecryptfs_dentry_to_lower(dentry); + lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate) goto out; dentry_save = nd->path.dentry; diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index 40186b9..413a3c4 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -377,6 +377,7 @@ struct ecryptfs_mount_crypt_stat { #define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010 #define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020 #define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040 +#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080 u32 flags; struct list_head global_auth_tok_list; struct mutex global_auth_tok_list_mutex; diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 3fbc942..337352a 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -32,6 +32,7 @@ #include <linux/crypto.h> #include <linux/fs_stack.h> #include <linux/slab.h> +#include <linux/xattr.h> #include <asm/unaligned.h> #include "ecryptfs_kernel.h" @@ -70,15 +71,19 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode, struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); struct dentry *dentry_save; struct vfsmount *vfsmount_save; + unsigned int flags_save; int rc; dentry_save = nd->path.dentry; vfsmount_save = nd->path.mnt; + flags_save = nd->flags; nd->path.dentry = lower_dentry; nd->path.mnt = lower_mnt; + nd->flags &= ~LOOKUP_OPEN; rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); nd->path.dentry = dentry_save; nd->path.mnt = vfsmount_save; + nd->flags = flags_save; return rc; } @@ -255,7 +260,7 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry, ecryptfs_dentry->d_parent)); lower_inode = lower_dentry->d_inode; fsstack_copy_attr_atime(ecryptfs_dir_inode, lower_dir_dentry->d_inode); - BUG_ON(!atomic_read(&lower_dentry->d_count)); + BUG_ON(!lower_dentry->d_count); ecryptfs_set_dentry_private(ecryptfs_dentry, kmem_cache_alloc(ecryptfs_dentry_info_cache, GFP_KERNEL)); @@ -436,7 +441,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, struct qstr lower_name; int rc = 0; - ecryptfs_dentry->d_op = &ecryptfs_dops; + d_set_d_op(ecryptfs_dentry, &ecryptfs_dops); if ((ecryptfs_dentry->d_name.len == 1 && !strcmp(ecryptfs_dentry->d_name.name, ".")) || (ecryptfs_dentry->d_name.len == 2 @@ -449,7 +454,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, lower_name.hash = ecryptfs_dentry->d_name.hash; if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) { rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry, - &lower_name); + lower_dir_dentry->d_inode, &lower_name); if (rc < 0) goto out_d_drop; } @@ -484,7 +489,7 @@ static struct dentry *ecryptfs_lookup(struct inode *ecryptfs_dir_inode, lower_name.hash = full_name_hash(lower_name.name, lower_name.len); if (lower_dir_dentry->d_op && lower_dir_dentry->d_op->d_hash) { rc = lower_dir_dentry->d_op->d_hash(lower_dir_dentry, - &lower_name); + lower_dir_dentry->d_inode, &lower_name); if (rc < 0) goto out_d_drop; } @@ -975,8 +980,10 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length) } static int -ecryptfs_permission(struct inode *inode, int mask) +ecryptfs_permission(struct inode *inode, int mask, unsigned int flags) { + if (flags & IPERM_FLAG_RCU) + return -ECHILD; return inode_permission(ecryptfs_inode_to_lower(inode), mask); } @@ -1108,10 +1115,8 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, rc = -EOPNOTSUPP; goto out; } - mutex_lock(&lower_dentry->d_inode->i_mutex); - rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, - size, flags); - mutex_unlock(&lower_dentry->d_inode->i_mutex); + + rc = vfs_setxattr(lower_dentry, name, value, size, flags); out: return rc; } diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c index 73811cf..b1f6858 100644 --- a/fs/ecryptfs/keystore.c +++ b/fs/ecryptfs/keystore.c @@ -446,6 +446,7 @@ out: */ static int ecryptfs_find_auth_tok_for_sig( + struct key **auth_tok_key, struct ecryptfs_auth_tok **auth_tok, struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig) @@ -453,12 +454,21 @@ ecryptfs_find_auth_tok_for_sig( struct ecryptfs_global_auth_tok *global_auth_tok; int rc = 0; + (*auth_tok_key) = NULL; (*auth_tok) = NULL; if (ecryptfs_find_global_auth_tok_for_sig(&global_auth_tok, mount_crypt_stat, sig)) { - struct key *auth_tok_key; - rc = ecryptfs_keyring_auth_tok_for_sig(&auth_tok_key, auth_tok, + /* if the flag ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY is set in the + * mount_crypt_stat structure, we prevent to use auth toks that + * are not inserted through the ecryptfs_add_global_auth_tok + * function. + */ + if (mount_crypt_stat->flags + & ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY) + return -EINVAL; + + rc = ecryptfs_keyring_auth_tok_for_sig(auth_tok_key, auth_tok, sig); } else (*auth_tok) = global_auth_tok->global_auth_tok; @@ -509,6 +519,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, char *filename, size_t filename_size) { struct ecryptfs_write_tag_70_packet_silly_stack *s; + struct key *auth_tok_key = NULL; int rc = 0; s = kmalloc(sizeof(*s), GFP_KERNEL); @@ -606,6 +617,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, } dest[s->i++] = s->cipher_code; rc = ecryptfs_find_auth_tok_for_sig( + &auth_tok_key, &s->auth_tok, mount_crypt_stat, mount_crypt_stat->global_default_fnek_sig); if (rc) { @@ -753,6 +765,8 @@ out_free_unlock: out_unlock: mutex_unlock(s->tfm_mutex); out: + if (auth_tok_key) + key_put(auth_tok_key); kfree(s); return rc; } @@ -798,6 +812,7 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, char *data, size_t max_packet_size) { struct ecryptfs_parse_tag_70_packet_silly_stack *s; + struct key *auth_tok_key = NULL; int rc = 0; (*packet_size) = 0; @@ -910,7 +925,8 @@ ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, * >= ECRYPTFS_MAX_IV_BYTES. */ memset(s->iv, 0, ECRYPTFS_MAX_IV_BYTES); s->desc.info = s->iv; - rc = ecryptfs_find_auth_tok_for_sig(&s->auth_tok, mount_crypt_stat, + rc = ecryptfs_find_auth_tok_for_sig(&auth_tok_key, + &s->auth_tok, mount_crypt_stat, s->fnek_sig_hex); if (rc) { printk(KERN_ERR "%s: Error attempting to find auth tok for " @@ -986,6 +1002,8 @@ out: (*filename_size) = 0; (*filename) = NULL; } + if (auth_tok_key) + key_put(auth_tok_key); kfree(s); return rc; } @@ -1557,14 +1575,19 @@ int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, ECRYPTFS_VERSION_MAJOR, ECRYPTFS_VERSION_MINOR); rc = -EINVAL; - goto out; + goto out_release_key; } if ((*auth_tok)->token_type != ECRYPTFS_PASSWORD && (*auth_tok)->token_type != ECRYPTFS_PRIVATE_KEY) { printk(KERN_ERR "Invalid auth_tok structure " "returned from key query\n"); rc = -EINVAL; - goto out; + goto out_release_key; + } +out_release_key: + if (rc) { + key_put(*auth_tok_key); + (*auth_tok_key) = NULL; } out: return rc; @@ -1688,6 +1711,7 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, struct ecryptfs_auth_tok_list_item *auth_tok_list_item; size_t tag_11_contents_size; size_t tag_11_packet_size; + struct key *auth_tok_key = NULL; int rc = 0; INIT_LIST_HEAD(&auth_tok_list); @@ -1784,6 +1808,10 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, * just one will be sufficient to decrypt to get the FEK. */ find_next_matching_auth_tok: found_auth_tok = 0; + if (auth_tok_key) { + key_put(auth_tok_key); + auth_tok_key = NULL; + } list_for_each_entry(auth_tok_list_item, &auth_tok_list, list) { candidate_auth_tok = &auth_tok_list_item->auth_tok; if (unlikely(ecryptfs_verbosity > 0)) { @@ -1800,10 +1828,11 @@ find_next_matching_auth_tok: rc = -EINVAL; goto out_wipe_list; } - ecryptfs_find_auth_tok_for_sig(&matching_auth_tok, + rc = ecryptfs_find_auth_tok_for_sig(&auth_tok_key, + &matching_auth_tok, crypt_stat->mount_crypt_stat, candidate_auth_tok_sig); - if (matching_auth_tok) { + if (!rc) { found_auth_tok = 1; goto found_matching_auth_tok; } @@ -1866,6 +1895,8 @@ found_matching_auth_tok: out_wipe_list: wipe_auth_tok_list(&auth_tok_list); out: + if (auth_tok_key) + key_put(auth_tok_key); return rc; } diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index cbd4e18..3510386 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -189,7 +189,7 @@ int ecryptfs_interpose(struct dentry *lower_dentry, struct dentry *dentry, if (special_file(lower_inode->i_mode)) init_special_inode(inode, lower_inode->i_mode, lower_inode->i_rdev); - dentry->d_op = &ecryptfs_dops; + d_set_d_op(dentry, &ecryptfs_dops); fsstack_copy_attr_all(inode, lower_inode); /* This size will be overwritten for real files w/ headers and * other metadata */ @@ -208,7 +208,8 @@ enum { ecryptfs_opt_sig, ecryptfs_opt_ecryptfs_sig, ecryptfs_opt_passthrough, ecryptfs_opt_xattr_metadata, ecryptfs_opt_encrypted_view, ecryptfs_opt_fnek_sig, ecryptfs_opt_fn_cipher, ecryptfs_opt_fn_cipher_key_bytes, - ecryptfs_opt_unlink_sigs, ecryptfs_opt_err }; + ecryptfs_opt_unlink_sigs, ecryptfs_opt_mount_auth_tok_only, + ecryptfs_opt_err }; static const match_table_t tokens = { {ecryptfs_opt_sig, "sig=%s"}, @@ -223,6 +224,7 @@ static const match_table_t tokens = { {ecryptfs_opt_fn_cipher, "ecryptfs_fn_cipher=%s"}, {ecryptfs_opt_fn_cipher_key_bytes, "ecryptfs_fn_key_bytes=%u"}, {ecryptfs_opt_unlink_sigs, "ecryptfs_unlink_sigs"}, + {ecryptfs_opt_mount_auth_tok_only, "ecryptfs_mount_auth_tok_only"}, {ecryptfs_opt_err, NULL} }; @@ -406,6 +408,10 @@ static int ecryptfs_parse_options(struct ecryptfs_sb_info *sbi, char *options) case ecryptfs_opt_unlink_sigs: mount_crypt_stat->flags |= ECRYPTFS_UNLINK_SIGS; break; + case ecryptfs_opt_mount_auth_tok_only: + mount_crypt_stat->flags |= + ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY; + break; case ecryptfs_opt_err: default: printk(KERN_WARNING @@ -540,9 +546,8 @@ out: * ecryptfs_interpose to perform most of the linking * ecryptfs_interpose(): links the lower filesystem into ecryptfs (inode.c) */ -static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data, - struct vfsmount *mnt) +static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { struct super_block *s; struct ecryptfs_sb_info *sbi; @@ -589,7 +594,7 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags, deactivate_locked_super(s); goto out; } - s->s_root->d_op = &ecryptfs_dops; + d_set_d_op(s->s_root, &ecryptfs_dops); s->s_root->d_sb = s; s->s_root->d_parent = s->s_root; @@ -607,8 +612,7 @@ static int ecryptfs_get_sb(struct file_system_type *fs_type, int flags, err = "Reading sb failed"; goto out; } - simple_set_mnt(mnt, s); - return 0; + return dget(s->s_root); out: if (sbi) { @@ -616,7 +620,7 @@ out: kmem_cache_free(ecryptfs_sb_info_cache, sbi); } printk(KERN_ERR "%s; rc = [%d]\n", err, rc); - return rc; + return ERR_PTR(rc); } /** @@ -639,7 +643,7 @@ static void ecryptfs_kill_block_super(struct super_block *sb) static struct file_system_type ecryptfs_fs_type = { .owner = THIS_MODULE, .name = "ecryptfs", - .get_sb = ecryptfs_get_sb, + .mount = ecryptfs_mount, .kill_sb = ecryptfs_kill_block_super, .fs_flags = 0 }; diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c index f7fc286..3042fe1 100644 --- a/fs/ecryptfs/super.c +++ b/fs/ecryptfs/super.c @@ -28,7 +28,6 @@ #include <linux/key.h> #include <linux/slab.h> #include <linux/seq_file.h> -#include <linux/smp_lock.h> #include <linux/file.h> #include <linux/crypto.h> #include "ecryptfs_kernel.h" @@ -63,6 +62,16 @@ out: return inode; } +static void ecryptfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct ecryptfs_inode_info *inode_info; + inode_info = ecryptfs_inode_to_private(inode); + + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(ecryptfs_inode_info_cache, inode_info); +} + /** * ecryptfs_destroy_inode * @inode: The ecryptfs inode @@ -89,7 +98,7 @@ static void ecryptfs_destroy_inode(struct inode *inode) } } ecryptfs_destroy_crypt_stat(&inode_info->crypt_stat); - kmem_cache_free(ecryptfs_inode_info_cache, inode_info); + call_rcu(&inode->i_rcu, ecryptfs_i_callback); } /** @@ -180,6 +189,8 @@ static int ecryptfs_show_options(struct seq_file *m, struct vfsmount *mnt) seq_printf(m, ",ecryptfs_encrypted_view"); if (mount_crypt_stat->flags & ECRYPTFS_UNLINK_SIGS) seq_printf(m, ",ecryptfs_unlink_sigs"); + if (mount_crypt_stat->flags & ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY) + seq_printf(m, ",ecryptfs_mount_auth_tok_only"); return 0; } diff --git a/fs/efs/super.c b/fs/efs/super.c index f049428..0f31acb 100644 --- a/fs/efs/super.c +++ b/fs/efs/super.c @@ -20,16 +20,16 @@ static int efs_statfs(struct dentry *dentry, struct kstatfs *buf); static int efs_fill_super(struct super_block *s, void *d, int silent); -static int efs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *efs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, efs_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, efs_fill_super); } static struct file_system_type efs_fs_type = { .owner = THIS_MODULE, .name = "efs", - .get_sb = efs_get_sb, + .mount = efs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -65,11 +65,18 @@ static struct inode *efs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void efs_destroy_inode(struct inode *inode) +static void efs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(efs_inode_cachep, INODE_INFO(inode)); } +static void efs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, efs_i_callback); +} + static void init_once(void *foo) { struct efs_inode_info *ei = (struct efs_inode_info *) foo; diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 8cf0724..cc8a9b7 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -217,7 +217,7 @@ struct ep_send_events_data { * Configuration options available inside /proc/sys/fs/epoll/ */ /* Maximum number of epoll watched descriptors, per user */ -static int max_user_watches __read_mostly; +static long max_user_watches __read_mostly; /* * This mutex is used to serialize ep_free() and eventpoll_release_file(). @@ -240,16 +240,18 @@ static struct kmem_cache *pwq_cache __read_mostly; #include <linux/sysctl.h> -static int zero; +static long zero; +static long long_max = LONG_MAX; ctl_table epoll_table[] = { { .procname = "max_user_watches", .data = &max_user_watches, - .maxlen = sizeof(int), + .maxlen = sizeof(max_user_watches), .mode = 0644, - .proc_handler = proc_dointvec_minmax, + .proc_handler = proc_doulongvec_minmax, .extra1 = &zero, + .extra2 = &long_max, }, { } }; @@ -561,7 +563,7 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi) /* At this point it is safe to free the eventpoll item */ kmem_cache_free(epi_cache, epi); - atomic_dec(&ep->user->epoll_watches); + atomic_long_dec(&ep->user->epoll_watches); return 0; } @@ -898,11 +900,12 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event, { int error, revents, pwake = 0; unsigned long flags; + long user_watches; struct epitem *epi; struct ep_pqueue epq; - if (unlikely(atomic_read(&ep->user->epoll_watches) >= - max_user_watches)) + user_watches = atomic_long_read(&ep->user->epoll_watches); + if (unlikely(user_watches >= max_user_watches)) return -ENOSPC; if (!(epi = kmem_cache_alloc(epi_cache, GFP_KERNEL))) return -ENOMEM; @@ -966,7 +969,7 @@ static int ep_insert(struct eventpoll *ep, struct epoll_event *event, spin_unlock_irqrestore(&ep->lock, flags); - atomic_inc(&ep->user->epoll_watches); + atomic_long_inc(&ep->user->epoll_watches); /* We have to call this outside the lock */ if (pwake) @@ -1426,6 +1429,7 @@ static int __init eventpoll_init(void) */ max_user_watches = (((si.totalram - si.totalhigh) / 25) << PAGE_SHIFT) / EP_ITEM_COST; + BUG_ON(max_user_watches < 0); /* Initialize the structure used to perform safe poll wait head wake ups */ ep_nested_calls_init(&poll_safewake_ncalls); @@ -164,7 +164,26 @@ out: #ifdef CONFIG_MMU -static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos, +void acct_arg_size(struct linux_binprm *bprm, unsigned long pages) +{ + struct mm_struct *mm = current->mm; + long diff = (long)(pages - bprm->vma_pages); + + if (!mm || !diff) + return; + + bprm->vma_pages = pages; + +#ifdef SPLIT_RSS_COUNTING + add_mm_counter(mm, MM_ANONPAGES, diff); +#else + spin_lock(&mm->page_table_lock); + add_mm_counter(mm, MM_ANONPAGES, diff); + spin_unlock(&mm->page_table_lock); +#endif +} + +struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos, int write) { struct page *page; @@ -186,6 +205,8 @@ static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos, unsigned long size = bprm->vma->vm_end - bprm->vma->vm_start; struct rlimit *rlim; + acct_arg_size(bprm, size / PAGE_SIZE); + /* * We've historically supported up to 32 pages (ARG_MAX) * of argument strings even with small stacks @@ -254,6 +275,11 @@ static int __bprm_mm_init(struct linux_binprm *bprm) vma->vm_flags = VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP; vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); INIT_LIST_HEAD(&vma->anon_vma_chain); + + err = security_file_mmap(NULL, 0, 0, 0, vma->vm_start, 1); + if (err) + goto err; + err = insert_vm_struct(mm, vma); if (err) goto err; @@ -276,7 +302,11 @@ static bool valid_arg_len(struct linux_binprm *bprm, long len) #else -static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos, +void acct_arg_size(struct linux_binprm *bprm, unsigned long pages) +{ +} + +struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos, int write) { struct page *page; @@ -1003,6 +1033,7 @@ int flush_old_exec(struct linux_binprm * bprm) /* * Release all of the old mmap stuff */ + acct_arg_size(bprm, 0); retval = exec_mmap(bprm->mm); if (retval) goto out; @@ -1426,8 +1457,10 @@ int do_execve(const char * filename, return retval; out: - if (bprm->mm) - mmput (bprm->mm); + if (bprm->mm) { + acct_arg_size(bprm, 0); + mmput(bprm->mm); + } out_file: if (bprm->file) { diff --git a/fs/exofs/super.c b/fs/exofs/super.c index 047e92f..8c6c466 100644 --- a/fs/exofs/super.c +++ b/fs/exofs/super.c @@ -150,12 +150,19 @@ static struct inode *exofs_alloc_inode(struct super_block *sb) return &oi->vfs_inode; } +static void exofs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(exofs_inode_cachep, exofs_i(inode)); +} + /* * Remove an inode from the cache */ static void exofs_destroy_inode(struct inode *inode) { - kmem_cache_free(exofs_inode_cachep, exofs_i(inode)); + call_rcu(&inode->i_rcu, exofs_i_callback); } /* @@ -659,19 +666,19 @@ free_bdi: /* * Set up the superblock (calls exofs_fill_super eventually) */ -static int exofs_get_sb(struct file_system_type *type, +static struct dentry *exofs_mount(struct file_system_type *type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { struct exofs_mountopt opts; int ret; ret = parse_options(data, &opts); if (ret) - return ret; + return ERR_PTR(ret); opts.dev_name = dev_name; - return get_sb_nodev(type, flags, &opts, exofs_fill_super, mnt); + return mount_nodev(type, flags, &opts, exofs_fill_super); } /* @@ -809,7 +816,7 @@ static const struct export_operations exofs_export_ops = { static struct file_system_type exofs_type = { .owner = THIS_MODULE, .name = "exofs", - .get_sb = exofs_get_sb, + .mount = exofs_mount, .kill_sb = generic_shutdown_super, }; diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c index 51b3040..4b68257 100644 --- a/fs/exportfs/expfs.c +++ b/fs/exportfs/expfs.c @@ -43,24 +43,26 @@ find_acceptable_alias(struct dentry *result, void *context) { struct dentry *dentry, *toput = NULL; + struct inode *inode; if (acceptable(context, result)) return result; - spin_lock(&dcache_lock); - list_for_each_entry(dentry, &result->d_inode->i_dentry, d_alias) { - dget_locked(dentry); - spin_unlock(&dcache_lock); + inode = result->d_inode; + spin_lock(&inode->i_lock); + list_for_each_entry(dentry, &inode->i_dentry, d_alias) { + dget(dentry); + spin_unlock(&inode->i_lock); if (toput) dput(toput); if (dentry != result && acceptable(context, dentry)) { dput(result); return dentry; } - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); toput = dentry; } - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); if (toput) dput(toput); diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c index 2bcc043..7b41805 100644 --- a/fs/ext2/acl.c +++ b/fs/ext2/acl.c @@ -232,10 +232,17 @@ ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl) } int -ext2_check_acl(struct inode *inode, int mask) +ext2_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct posix_acl *acl = ext2_get_acl(inode, ACL_TYPE_ACCESS); + struct posix_acl *acl; + + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + return -ECHILD; + return -EAGAIN; + } + acl = ext2_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); if (acl) { diff --git a/fs/ext2/acl.h b/fs/ext2/acl.h index 3ff6cbb..c939b7b 100644 --- a/fs/ext2/acl.h +++ b/fs/ext2/acl.h @@ -54,7 +54,7 @@ static inline int ext2_acl_count(size_t size) #ifdef CONFIG_EXT2_FS_POSIX_ACL /* acl.c */ -extern int ext2_check_acl (struct inode *, int); +extern int ext2_check_acl (struct inode *, int, unsigned int); extern int ext2_acl_chmod (struct inode *); extern int ext2_init_acl (struct inode *, struct inode *); diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c index 2709b34..47cda41 100644 --- a/fs/ext2/dir.c +++ b/fs/ext2/dir.c @@ -28,21 +28,30 @@ typedef struct ext2_dir_entry_2 ext2_dirent; +/* + * Tests against MAX_REC_LEN etc were put in place for 64k block + * sizes; if that is not possible on this arch, we can skip + * those tests and speed things up. + */ static inline unsigned ext2_rec_len_from_disk(__le16 dlen) { unsigned len = le16_to_cpu(dlen); +#if (PAGE_CACHE_SIZE >= 65536) if (len == EXT2_MAX_REC_LEN) return 1 << 16; +#endif return len; } static inline __le16 ext2_rec_len_to_disk(unsigned len) { +#if (PAGE_CACHE_SIZE >= 65536) if (len == (1 << 16)) return cpu_to_le16(EXT2_MAX_REC_LEN); else BUG_ON(len > (1 << 16)); +#endif return cpu_to_le16(len); } @@ -129,15 +138,15 @@ static void ext2_check_page(struct page *page, int quiet) p = (ext2_dirent *)(kaddr + offs); rec_len = ext2_rec_len_from_disk(p->rec_len); - if (rec_len < EXT2_DIR_REC_LEN(1)) + if (unlikely(rec_len < EXT2_DIR_REC_LEN(1))) goto Eshort; - if (rec_len & 3) + if (unlikely(rec_len & 3)) goto Ealign; - if (rec_len < EXT2_DIR_REC_LEN(p->name_len)) + if (unlikely(rec_len < EXT2_DIR_REC_LEN(p->name_len))) goto Enamelen; - if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1)) + if (unlikely(((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))) goto Espan; - if (le32_to_cpu(p->inode) > max_inumber) + if (unlikely(le32_to_cpu(p->inode) > max_inumber)) goto Einumber; } if (offs != limit) diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index f8aecd2..2e1d834 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -67,7 +67,7 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, str inode = NULL; if (ino) { inode = ext2_iget(dir->i_sb, ino); - if (unlikely(IS_ERR(inode))) { + if (IS_ERR(inode)) { if (PTR_ERR(inode) == -ESTALE) { ext2_error(dir->i_sb, __func__, "deleted inode referenced: %lu", diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 09013206..7731695 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -43,9 +43,10 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data); static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf); static int ext2_sync_fs(struct super_block *sb, int wait); -void ext2_error (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext2_error(struct super_block *sb, const char *function, + const char *fmt, ...) { + struct va_format vaf; va_list args; struct ext2_sb_info *sbi = EXT2_SB(sb); struct ext2_super_block *es = sbi->s_es; @@ -59,9 +60,13 @@ void ext2_error (struct super_block * sb, const char * function, } va_start(args, fmt); - printk(KERN_CRIT "EXT2-fs (%s): error: %s: ", sb->s_id, function); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_CRIT "EXT2-fs (%s): error: %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); if (test_opt(sb, ERRORS_PANIC)) @@ -76,12 +81,16 @@ void ext2_error (struct super_block * sb, const char * function, void ext2_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk("%sEXT2-fs (%s): ", prefix, sb->s_id); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk("%sEXT2-fs (%s): %pV\n", prefix, sb->s_id, &vaf); + va_end(args); } @@ -161,11 +170,18 @@ static struct inode *ext2_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void ext2_destroy_inode(struct inode *inode) +static void ext2_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(ext2_inode_cachep, EXT2_I(inode)); } +static void ext2_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, ext2_i_callback); +} + static void init_once(void *foo) { struct ext2_inode_info *ei = (struct ext2_inode_info *) foo; @@ -1356,10 +1372,10 @@ static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf) return 0; } -static int ext2_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *ext2_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, ext2_fill_super); } #ifdef CONFIG_QUOTA @@ -1473,7 +1489,7 @@ out: static struct file_system_type ext2_fs_type = { .owner = THIS_MODULE, .name = "ext2", - .get_sb = ext2_get_sb, + .mount = ext2_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c index f84700b..c2e4dce 100644 --- a/fs/ext2/xattr.c +++ b/fs/ext2/xattr.c @@ -199,14 +199,6 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_get", goto found; entry = next; } - /* Check the remaining name entries */ - while (!IS_LAST_ENTRY(entry)) { - struct ext2_xattr_entry *next = - EXT2_XATTR_NEXT(entry); - if ((char *)next >= end) - goto bad_block; - entry = next; - } if (ext2_xattr_cache_insert(bh)) ea_idebug(inode, "cache insert failed"); error = -ENODATA; @@ -355,7 +347,7 @@ static void ext2_xattr_update_super_block(struct super_block *sb) /* * ext2_xattr_set() * - * Create, replace or remove an extended attribute for this inode. Buffer + * Create, replace or remove an extended attribute for this inode. Value * is NULL to remove an existing extended attribute, and non-NULL to * either replace an existing extended attribute, or create a new extended * attribute. The flags XATTR_REPLACE and XATTR_CREATE diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c index 8a11fe2..e4fa49e 100644 --- a/fs/ext3/acl.c +++ b/fs/ext3/acl.c @@ -240,10 +240,17 @@ ext3_set_acl(handle_t *handle, struct inode *inode, int type, } int -ext3_check_acl(struct inode *inode, int mask) +ext3_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct posix_acl *acl = ext3_get_acl(inode, ACL_TYPE_ACCESS); + struct posix_acl *acl; + + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + return -ECHILD; + return -EAGAIN; + } + acl = ext3_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); if (acl) { diff --git a/fs/ext3/acl.h b/fs/ext3/acl.h index 5973346..5faf8048 100644 --- a/fs/ext3/acl.h +++ b/fs/ext3/acl.h @@ -54,7 +54,7 @@ static inline int ext3_acl_count(size_t size) #ifdef CONFIG_EXT3_FS_POSIX_ACL /* acl.c */ -extern int ext3_check_acl (struct inode *, int); +extern int ext3_check_acl (struct inode *, int, unsigned int); extern int ext3_acl_chmod (struct inode *); extern int ext3_init_acl (handle_t *, struct inode *, struct inode *); diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c index b3db226..045995c 100644 --- a/fs/ext3/balloc.c +++ b/fs/ext3/balloc.c @@ -20,6 +20,7 @@ #include <linux/ext3_jbd.h> #include <linux/quotaops.h> #include <linux/buffer_head.h> +#include <linux/blkdev.h> /* * balloc.c contains the blocks allocation and deallocation routines @@ -39,6 +40,21 @@ #define in_range(b, first, len) ((b) >= (first) && (b) <= (first) + (len) - 1) +/* + * Calculate the block group number and offset, given a block number + */ +static void ext3_get_group_no_and_offset(struct super_block *sb, + ext3_fsblk_t blocknr, unsigned long *blockgrpp, ext3_grpblk_t *offsetp) +{ + struct ext3_super_block *es = EXT3_SB(sb)->s_es; + + blocknr = blocknr - le32_to_cpu(es->s_first_data_block); + if (offsetp) + *offsetp = blocknr % EXT3_BLOCKS_PER_GROUP(sb); + if (blockgrpp) + *blockgrpp = blocknr / EXT3_BLOCKS_PER_GROUP(sb); +} + /** * ext3_get_group_desc() -- load group descriptor from disk * @sb: super block @@ -1885,3 +1901,253 @@ unsigned long ext3_bg_num_gdb(struct super_block *sb, int group) return ext3_bg_num_gdb_meta(sb,group); } + +/** + * ext3_trim_all_free -- function to trim all free space in alloc. group + * @sb: super block for file system + * @group: allocation group to trim + * @start: first group block to examine + * @max: last group block to examine + * @gdp: allocation group description structure + * @minblocks: minimum extent block count + * + * ext3_trim_all_free walks through group's block bitmap searching for free + * blocks. When the free block is found, it tries to allocate this block and + * consequent free block to get the biggest free extent possible, until it + * reaches any used block. Then issue a TRIM command on this extent and free + * the extent in the block bitmap. This is done until whole group is scanned. + */ +ext3_grpblk_t ext3_trim_all_free(struct super_block *sb, unsigned int group, + ext3_grpblk_t start, ext3_grpblk_t max, + ext3_grpblk_t minblocks) +{ + handle_t *handle; + ext3_grpblk_t next, free_blocks, bit, freed, count = 0; + ext3_fsblk_t discard_block; + struct ext3_sb_info *sbi; + struct buffer_head *gdp_bh, *bitmap_bh = NULL; + struct ext3_group_desc *gdp; + int err = 0, ret = 0; + + /* + * We will update one block bitmap, and one group descriptor + */ + handle = ext3_journal_start_sb(sb, 2); + if (IS_ERR(handle)) + return PTR_ERR(handle); + + bitmap_bh = read_block_bitmap(sb, group); + if (!bitmap_bh) { + err = -EIO; + goto err_out; + } + + BUFFER_TRACE(bitmap_bh, "getting undo access"); + err = ext3_journal_get_undo_access(handle, bitmap_bh); + if (err) + goto err_out; + + gdp = ext3_get_group_desc(sb, group, &gdp_bh); + if (!gdp) { + err = -EIO; + goto err_out; + } + + BUFFER_TRACE(gdp_bh, "get_write_access"); + err = ext3_journal_get_write_access(handle, gdp_bh); + if (err) + goto err_out; + + free_blocks = le16_to_cpu(gdp->bg_free_blocks_count); + sbi = EXT3_SB(sb); + + /* Walk through the whole group */ + while (start < max) { + start = bitmap_search_next_usable_block(start, bitmap_bh, max); + if (start < 0) + break; + next = start; + + /* + * Allocate contiguous free extents by setting bits in the + * block bitmap + */ + while (next < max + && claim_block(sb_bgl_lock(sbi, group), + next, bitmap_bh)) { + next++; + } + + /* We did not claim any blocks */ + if (next == start) + continue; + + discard_block = (ext3_fsblk_t)start + + ext3_group_first_block_no(sb, group); + + /* Update counters */ + spin_lock(sb_bgl_lock(sbi, group)); + le16_add_cpu(&gdp->bg_free_blocks_count, start - next); + spin_unlock(sb_bgl_lock(sbi, group)); + percpu_counter_sub(&sbi->s_freeblocks_counter, next - start); + + /* Do not issue a TRIM on extents smaller than minblocks */ + if ((next - start) < minblocks) + goto free_extent; + + /* Send the TRIM command down to the device */ + err = sb_issue_discard(sb, discard_block, next - start, + GFP_NOFS, 0); + count += (next - start); +free_extent: + freed = 0; + + /* + * Clear bits in the bitmap + */ + for (bit = start; bit < next; bit++) { + BUFFER_TRACE(bitmap_bh, "clear bit"); + if (!ext3_clear_bit_atomic(sb_bgl_lock(sbi, group), + bit, bitmap_bh->b_data)) { + ext3_error(sb, __func__, + "bit already cleared for block "E3FSBLK, + (unsigned long)bit); + BUFFER_TRACE(bitmap_bh, "bit already cleared"); + } else { + freed++; + } + } + + /* Update couters */ + spin_lock(sb_bgl_lock(sbi, group)); + le16_add_cpu(&gdp->bg_free_blocks_count, freed); + spin_unlock(sb_bgl_lock(sbi, group)); + percpu_counter_add(&sbi->s_freeblocks_counter, freed); + + start = next; + if (err < 0) { + if (err != -EOPNOTSUPP) + ext3_warning(sb, __func__, "Discard command " + "returned error %d\n", err); + break; + } + + if (fatal_signal_pending(current)) { + err = -ERESTARTSYS; + break; + } + + cond_resched(); + + /* No more suitable extents */ + if ((free_blocks - count) < minblocks) + break; + } + + /* We dirtied the bitmap block */ + BUFFER_TRACE(bitmap_bh, "dirtied bitmap block"); + ret = ext3_journal_dirty_metadata(handle, bitmap_bh); + if (!err) + err = ret; + + /* And the group descriptor block */ + BUFFER_TRACE(gdp_bh, "dirtied group descriptor block"); + ret = ext3_journal_dirty_metadata(handle, gdp_bh); + if (!err) + err = ret; + + ext3_debug("trimmed %d blocks in the group %d\n", + count, group); + +err_out: + if (err) + count = err; + ext3_journal_stop(handle); + brelse(bitmap_bh); + + return count; +} + +/** + * ext3_trim_fs() -- trim ioctl handle function + * @sb: superblock for filesystem + * @start: First Byte to trim + * @len: number of Bytes to trim from start + * @minlen: minimum extent length in Bytes + * + * ext3_trim_fs goes through all allocation groups containing Bytes from + * start to start+len. For each such a group ext3_trim_all_free function + * is invoked to trim all free space. + */ +int ext3_trim_fs(struct super_block *sb, struct fstrim_range *range) +{ + ext3_grpblk_t last_block, first_block, free_blocks; + unsigned long first_group, last_group; + unsigned long group, ngroups; + struct ext3_group_desc *gdp; + struct ext3_super_block *es = EXT3_SB(sb)->s_es; + uint64_t start, len, minlen, trimmed; + ext3_fsblk_t max_blks = le32_to_cpu(es->s_blocks_count); + int ret = 0; + + start = range->start >> sb->s_blocksize_bits; + len = range->len >> sb->s_blocksize_bits; + minlen = range->minlen >> sb->s_blocksize_bits; + trimmed = 0; + + if (unlikely(minlen > EXT3_BLOCKS_PER_GROUP(sb))) + return -EINVAL; + if (start >= max_blks) + goto out; + if (start < le32_to_cpu(es->s_first_data_block)) { + len -= le32_to_cpu(es->s_first_data_block) - start; + start = le32_to_cpu(es->s_first_data_block); + } + if (start + len > max_blks) + len = max_blks - start; + + ngroups = EXT3_SB(sb)->s_groups_count; + smp_rmb(); + + /* Determine first and last group to examine based on start and len */ + ext3_get_group_no_and_offset(sb, (ext3_fsblk_t) start, + &first_group, &first_block); + ext3_get_group_no_and_offset(sb, (ext3_fsblk_t) (start + len), + &last_group, &last_block); + last_group = (last_group > ngroups - 1) ? ngroups - 1 : last_group; + last_block = EXT3_BLOCKS_PER_GROUP(sb); + + if (first_group > last_group) + return -EINVAL; + + for (group = first_group; group <= last_group; group++) { + gdp = ext3_get_group_desc(sb, group, NULL); + if (!gdp) + break; + + free_blocks = le16_to_cpu(gdp->bg_free_blocks_count); + if (free_blocks < minlen) + continue; + + if (len >= EXT3_BLOCKS_PER_GROUP(sb)) + len -= (EXT3_BLOCKS_PER_GROUP(sb) - first_block); + else + last_block = first_block + len; + + ret = ext3_trim_all_free(sb, group, first_block, + last_block, minlen); + if (ret < 0) + break; + + trimmed += ret; + first_block = 0; + } + + if (ret >= 0) + ret = 0; + +out: + range->len = trimmed * sb->s_blocksize; + + return ret; +} diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c index e2e72c3..34f0a07 100644 --- a/fs/ext3/dir.c +++ b/fs/ext3/dir.c @@ -69,25 +69,26 @@ int ext3_check_dir_entry (const char * function, struct inode * dir, const char * error_msg = NULL; const int rlen = ext3_rec_len_from_disk(de->rec_len); - if (rlen < EXT3_DIR_REC_LEN(1)) + if (unlikely(rlen < EXT3_DIR_REC_LEN(1))) error_msg = "rec_len is smaller than minimal"; - else if (rlen % 4 != 0) + else if (unlikely(rlen % 4 != 0)) error_msg = "rec_len % 4 != 0"; - else if (rlen < EXT3_DIR_REC_LEN(de->name_len)) + else if (unlikely(rlen < EXT3_DIR_REC_LEN(de->name_len))) error_msg = "rec_len is too small for name_len"; - else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) + else if (unlikely((((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize))) error_msg = "directory entry across blocks"; - else if (le32_to_cpu(de->inode) > - le32_to_cpu(EXT3_SB(dir->i_sb)->s_es->s_inodes_count)) + else if (unlikely(le32_to_cpu(de->inode) > + le32_to_cpu(EXT3_SB(dir->i_sb)->s_es->s_inodes_count))) error_msg = "inode out of bounds"; - if (error_msg != NULL) + if (unlikely(error_msg != NULL)) ext3_error (dir->i_sb, function, "bad entry in directory #%lu: %s - " "offset=%lu, inode=%lu, rec_len=%d, name_len=%d", dir->i_ino, error_msg, offset, (unsigned long) le32_to_cpu(de->inode), rlen, de->name_len); + return error_msg == NULL ? 1 : 0; } diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c index a958061..ae94f6d 100644 --- a/fs/ext3/inode.c +++ b/fs/ext3/inode.c @@ -2145,13 +2145,15 @@ static void ext3_clear_blocks(handle_t *handle, struct inode *inode, if (try_to_extend_transaction(handle, inode)) { if (bh) { BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata"); - ext3_journal_dirty_metadata(handle, bh); + if (ext3_journal_dirty_metadata(handle, bh)) + return; } ext3_mark_inode_dirty(handle, inode); truncate_restart_transaction(handle, inode); if (bh) { BUFFER_TRACE(bh, "retaking write access"); - ext3_journal_get_write_access(handle, bh); + if (ext3_journal_get_write_access(handle, bh)) + return; } } diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c index 8897481..fc080dd 100644 --- a/fs/ext3/ioctl.c +++ b/fs/ext3/ioctl.c @@ -276,7 +276,29 @@ group_add_out: mnt_drop_write(filp->f_path.mnt); return err; } + case FITRIM: { + struct super_block *sb = inode->i_sb; + struct fstrim_range range; + int ret = 0; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (copy_from_user(&range, (struct fstrim_range *)arg, + sizeof(range))) + return -EFAULT; + + ret = ext3_trim_fs(sb, &range); + if (ret < 0) + return ret; + + if (copy_to_user((struct fstrim_range *)arg, &range, + sizeof(range))) + return -EFAULT; + + return 0; + } default: return -ENOTTY; diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c index bce9dce..b27ba71 100644 --- a/fs/ext3/namei.c +++ b/fs/ext3/namei.c @@ -858,6 +858,7 @@ static struct buffer_head *ext3_find_entry(struct inode *dir, struct buffer_head * bh_use[NAMEI_RA_SIZE]; struct buffer_head * bh, *ret = NULL; unsigned long start, block, b; + const u8 *name = entry->name; int ra_max = 0; /* Number of bh's in the readahead buffer, bh_use[] */ int ra_ptr = 0; /* Current index into readahead @@ -871,6 +872,16 @@ static struct buffer_head *ext3_find_entry(struct inode *dir, namelen = entry->len; if (namelen > EXT3_NAME_LEN) return NULL; + if ((namelen <= 2) && (name[0] == '.') && + (name[1] == '.' || name[1] == 0)) { + /* + * "." or ".." will only be in the first block + * NFS may look up ".."; "." should be handled by the VFS + */ + block = start = 0; + nblocks = 1; + goto restart; + } if (is_dx(dir)) { bh = ext3_dx_find_entry(dir, entry, res_dir, &err); /* @@ -961,55 +972,35 @@ static struct buffer_head * ext3_dx_find_entry(struct inode *dir, struct qstr *entry, struct ext3_dir_entry_2 **res_dir, int *err) { - struct super_block * sb; + struct super_block *sb = dir->i_sb; struct dx_hash_info hinfo; - u32 hash; struct dx_frame frames[2], *frame; - struct ext3_dir_entry_2 *de, *top; struct buffer_head *bh; unsigned long block; int retval; - int namelen = entry->len; - const u8 *name = entry->name; - sb = dir->i_sb; - /* NFS may look up ".." - look at dx_root directory block */ - if (namelen > 2 || name[0] != '.'|| (namelen == 2 && name[1] != '.')) { - if (!(frame = dx_probe(entry, dir, &hinfo, frames, err))) - return NULL; - } else { - frame = frames; - frame->bh = NULL; /* for dx_release() */ - frame->at = (struct dx_entry *)frames; /* hack for zero entry*/ - dx_set_block(frame->at, 0); /* dx_root block is 0 */ - } - hash = hinfo.hash; + if (!(frame = dx_probe(entry, dir, &hinfo, frames, err))) + return NULL; do { block = dx_get_block(frame->at); if (!(bh = ext3_bread (NULL,dir, block, 0, err))) goto errout; - de = (struct ext3_dir_entry_2 *) bh->b_data; - top = (struct ext3_dir_entry_2 *) ((char *) de + sb->s_blocksize - - EXT3_DIR_REC_LEN(0)); - for (; de < top; de = ext3_next_entry(de)) { - int off = (block << EXT3_BLOCK_SIZE_BITS(sb)) - + ((char *) de - bh->b_data); - - if (!ext3_check_dir_entry(__func__, dir, de, bh, off)) { - brelse(bh); - *err = ERR_BAD_DX_DIR; - goto errout; - } - if (ext3_match(namelen, name, de)) { - *res_dir = de; - dx_release(frames); - return bh; - } + retval = search_dirblock(bh, dir, entry, + block << EXT3_BLOCK_SIZE_BITS(sb), + res_dir); + if (retval == 1) { + dx_release(frames); + return bh; } - brelse (bh); + brelse(bh); + if (retval == -1) { + *err = ERR_BAD_DX_DIR; + goto errout; + } + /* Check to see if we should continue to search */ - retval = ext3_htree_next_block(dir, hash, frame, + retval = ext3_htree_next_block(dir, hinfo.hash, frame, frames, NULL); if (retval < 0) { ext3_warning(sb, __func__, @@ -1047,7 +1038,7 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str return ERR_PTR(-EIO); } inode = ext3_iget(dir->i_sb, ino); - if (unlikely(IS_ERR(inode))) { + if (IS_ERR(inode)) { if (PTR_ERR(inode) == -ESTALE) { ext3_error(dir->i_sb, __func__, "deleted inode referenced: %lu", @@ -1607,7 +1598,9 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry, if (err) goto journal_error; } - ext3_journal_dirty_metadata(handle, frames[0].bh); + err = ext3_journal_dirty_metadata(handle, frames[0].bh); + if (err) + goto journal_error; } de = do_split(handle, dir, &bh, frame, &hinfo, &err); if (!de) @@ -1644,8 +1637,13 @@ static int ext3_delete_entry (handle_t *handle, if (!ext3_check_dir_entry("ext3_delete_entry", dir, de, bh, i)) return -EIO; if (de == de_del) { + int err; + BUFFER_TRACE(bh, "get_write_access"); - ext3_journal_get_write_access(handle, bh); + err = ext3_journal_get_write_access(handle, bh); + if (err) + goto journal_error; + if (pde) pde->rec_len = ext3_rec_len_to_disk( ext3_rec_len_from_disk(pde->rec_len) + @@ -1654,7 +1652,12 @@ static int ext3_delete_entry (handle_t *handle, de->inode = 0; dir->i_version++; BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata"); - ext3_journal_dirty_metadata(handle, bh); + err = ext3_journal_dirty_metadata(handle, bh); + if (err) { +journal_error: + ext3_std_error(dir->i_sb, err); + return err; + } return 0; } i += ext3_rec_len_from_disk(de->rec_len); @@ -1762,7 +1765,7 @@ static int ext3_mkdir(struct inode * dir, struct dentry * dentry, int mode) { handle_t *handle; struct inode * inode; - struct buffer_head * dir_block; + struct buffer_head * dir_block = NULL; struct ext3_dir_entry_2 * de; int err, retries = 0; @@ -1790,15 +1793,14 @@ retry: inode->i_fop = &ext3_dir_operations; inode->i_size = EXT3_I(inode)->i_disksize = inode->i_sb->s_blocksize; dir_block = ext3_bread (handle, inode, 0, 1, &err); - if (!dir_block) { - drop_nlink(inode); /* is this nlink == 0? */ - unlock_new_inode(inode); - ext3_mark_inode_dirty(handle, inode); - iput (inode); - goto out_stop; - } + if (!dir_block) + goto out_clear_inode; + BUFFER_TRACE(dir_block, "get_write_access"); - ext3_journal_get_write_access(handle, dir_block); + err = ext3_journal_get_write_access(handle, dir_block); + if (err) + goto out_clear_inode; + de = (struct ext3_dir_entry_2 *) dir_block->b_data; de->inode = cpu_to_le32(inode->i_ino); de->name_len = 1; @@ -1814,11 +1816,16 @@ retry: ext3_set_de_type(dir->i_sb, de, S_IFDIR); inode->i_nlink = 2; BUFFER_TRACE(dir_block, "call ext3_journal_dirty_metadata"); - ext3_journal_dirty_metadata(handle, dir_block); - brelse (dir_block); - ext3_mark_inode_dirty(handle, inode); - err = ext3_add_entry (handle, dentry, inode); + err = ext3_journal_dirty_metadata(handle, dir_block); + if (err) + goto out_clear_inode; + + err = ext3_mark_inode_dirty(handle, inode); + if (!err) + err = ext3_add_entry (handle, dentry, inode); + if (err) { +out_clear_inode: inode->i_nlink = 0; unlock_new_inode(inode); ext3_mark_inode_dirty(handle, inode); @@ -1827,10 +1834,14 @@ retry: } inc_nlink(dir); ext3_update_dx_flag(dir); - ext3_mark_inode_dirty(handle, dir); + err = ext3_mark_inode_dirty(handle, dir); + if (err) + goto out_clear_inode; + d_instantiate(dentry, inode); unlock_new_inode(inode); out_stop: + brelse(dir_block); ext3_journal_stop(handle); if (err == -ENOSPC && ext3_should_retry_alloc(dir->i_sb, &retries)) goto retry; @@ -2353,7 +2364,9 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry, goto end_rename; } else { BUFFER_TRACE(new_bh, "get write access"); - ext3_journal_get_write_access(handle, new_bh); + retval = ext3_journal_get_write_access(handle, new_bh); + if (retval) + goto journal_error; new_de->inode = cpu_to_le32(old_inode->i_ino); if (EXT3_HAS_INCOMPAT_FEATURE(new_dir->i_sb, EXT3_FEATURE_INCOMPAT_FILETYPE)) @@ -2362,7 +2375,9 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry, new_dir->i_ctime = new_dir->i_mtime = CURRENT_TIME_SEC; ext3_mark_inode_dirty(handle, new_dir); BUFFER_TRACE(new_bh, "call ext3_journal_dirty_metadata"); - ext3_journal_dirty_metadata(handle, new_bh); + retval = ext3_journal_dirty_metadata(handle, new_bh); + if (retval) + goto journal_error; brelse(new_bh); new_bh = NULL; } @@ -2411,10 +2426,17 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry, ext3_update_dx_flag(old_dir); if (dir_bh) { BUFFER_TRACE(dir_bh, "get_write_access"); - ext3_journal_get_write_access(handle, dir_bh); + retval = ext3_journal_get_write_access(handle, dir_bh); + if (retval) + goto journal_error; PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino); BUFFER_TRACE(dir_bh, "call ext3_journal_dirty_metadata"); - ext3_journal_dirty_metadata(handle, dir_bh); + retval = ext3_journal_dirty_metadata(handle, dir_bh); + if (retval) { +journal_error: + ext3_std_error(new_dir->i_sb, retval); + goto end_rename; + } drop_nlink(old_dir); if (new_inode) { drop_nlink(new_inode); diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c index e746d30..108b142 100644 --- a/fs/ext3/resize.c +++ b/fs/ext3/resize.c @@ -249,7 +249,11 @@ static int setup_new_group_blocks(struct super_block *sb, memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, gdb->b_size); set_buffer_uptodate(gdb); unlock_buffer(gdb); - ext3_journal_dirty_metadata(handle, gdb); + err = ext3_journal_dirty_metadata(handle, gdb); + if (err) { + brelse(gdb); + goto exit_bh; + } ext3_set_bit(bit, bh->b_data); brelse(gdb); } @@ -269,7 +273,11 @@ static int setup_new_group_blocks(struct super_block *sb, err = PTR_ERR(gdb); goto exit_bh; } - ext3_journal_dirty_metadata(handle, gdb); + err = ext3_journal_dirty_metadata(handle, gdb); + if (err) { + brelse(gdb); + goto exit_bh; + } ext3_set_bit(bit, bh->b_data); brelse(gdb); } @@ -295,7 +303,11 @@ static int setup_new_group_blocks(struct super_block *sb, err = PTR_ERR(it); goto exit_bh; } - ext3_journal_dirty_metadata(handle, it); + err = ext3_journal_dirty_metadata(handle, it); + if (err) { + brelse(it); + goto exit_bh; + } brelse(it); ext3_set_bit(bit, bh->b_data); } @@ -306,7 +318,9 @@ static int setup_new_group_blocks(struct super_block *sb, mark_bitmap_end(input->blocks_count, EXT3_BLOCKS_PER_GROUP(sb), bh->b_data); - ext3_journal_dirty_metadata(handle, bh); + err = ext3_journal_dirty_metadata(handle, bh); + if (err) + goto exit_bh; brelse(bh); /* Mark unused entries in inode bitmap used */ @@ -319,7 +333,7 @@ static int setup_new_group_blocks(struct super_block *sb, mark_bitmap_end(EXT3_INODES_PER_GROUP(sb), EXT3_BLOCKS_PER_GROUP(sb), bh->b_data); - ext3_journal_dirty_metadata(handle, bh); + err = ext3_journal_dirty_metadata(handle, bh); exit_bh: brelse(bh); @@ -503,12 +517,19 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, * reserved inode, and will become GDT blocks (primary and backup). */ data[gdb_num % EXT3_ADDR_PER_BLOCK(sb)] = 0; - ext3_journal_dirty_metadata(handle, dind); + err = ext3_journal_dirty_metadata(handle, dind); + if (err) + goto exit_group_desc; brelse(dind); + dind = NULL; inode->i_blocks -= (gdbackups + 1) * sb->s_blocksize >> 9; - ext3_mark_iloc_dirty(handle, inode, &iloc); + err = ext3_mark_iloc_dirty(handle, inode, &iloc); + if (err) + goto exit_group_desc; memset((*primary)->b_data, 0, sb->s_blocksize); - ext3_journal_dirty_metadata(handle, *primary); + err = ext3_journal_dirty_metadata(handle, *primary); + if (err) + goto exit_group_desc; o_group_desc = EXT3_SB(sb)->s_group_desc; memcpy(n_group_desc, o_group_desc, @@ -519,10 +540,14 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, kfree(o_group_desc); le16_add_cpu(&es->s_reserved_gdt_blocks, -1); - ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh); + err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh); + if (err) + goto exit_inode; return 0; +exit_group_desc: + kfree(n_group_desc); exit_inode: //ext3_journal_release_buffer(handle, iloc.bh); brelse(iloc.bh); @@ -706,16 +731,20 @@ static void update_backups(struct super_block *sb, } ext3_debug("update metadata backup %#04lx\n", (unsigned long)bh->b_blocknr); - if ((err = ext3_journal_get_write_access(handle, bh))) + if ((err = ext3_journal_get_write_access(handle, bh))) { + brelse(bh); break; + } lock_buffer(bh); memcpy(bh->b_data, data, size); if (rest) memset(bh->b_data + size, 0, rest); set_buffer_uptodate(bh); unlock_buffer(bh); - ext3_journal_dirty_metadata(handle, bh); + err = ext3_journal_dirty_metadata(handle, bh); brelse(bh); + if (err) + break; } if ((err2 = ext3_journal_stop(handle)) && !err) err = err2; @@ -922,7 +951,9 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input) /* Update the global fs size fields */ sbi->s_groups_count++; - ext3_journal_dirty_metadata(handle, primary); + err = ext3_journal_dirty_metadata(handle, primary); + if (err) + goto exit_journal; /* Update the reserved block counts only once the new group is * active. */ @@ -934,7 +965,7 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input) percpu_counter_add(&sbi->s_freeinodes_counter, EXT3_INODES_PER_GROUP(sb)); - ext3_journal_dirty_metadata(handle, sbi->s_sbh); + err = ext3_journal_dirty_metadata(handle, sbi->s_sbh); exit_journal: mutex_unlock(&sbi->s_resize_lock); @@ -1064,8 +1095,14 @@ int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es, goto exit_put; } es->s_blocks_count = cpu_to_le32(o_blocks_count + add); - ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh); + err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh); mutex_unlock(&EXT3_SB(sb)->s_resize_lock); + if (err) { + ext3_warning(sb, __func__, + "error %d on journal dirty metadata", err); + ext3_journal_stop(handle); + goto exit_put; + } ext3_debug("freeing blocks "E3FSBLK" through "E3FSBLK"\n", o_blocks_count, o_blocks_count + add); ext3_free_blocks_sb(handle, sb, o_blocks_count, add, &freed_blocks); diff --git a/fs/ext3/super.c b/fs/ext3/super.c index db87413..b7d0554 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -27,7 +27,6 @@ #include <linux/init.h> #include <linux/blkdev.h> #include <linux/parser.h> -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include <linux/exportfs.h> #include <linux/vfs.h> @@ -144,12 +143,16 @@ void ext3_journal_abort_handle(const char *caller, const char *err_fn, void ext3_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk("%sEXT3-fs (%s): ", prefix, sb->s_id); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk("%sEXT3-fs (%s): %pV\n", prefix, sb->s_id, &vaf); + va_end(args); } @@ -196,15 +199,20 @@ static void ext3_handle_error(struct super_block *sb) sb->s_id); } -void ext3_error (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext3_error(struct super_block *sb, const char *function, + const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_CRIT "EXT3-fs error (device %s): %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); ext3_handle_error(sb); @@ -275,15 +283,20 @@ void __ext3_std_error (struct super_block * sb, const char * function, * case we take the easy way out and panic immediately. */ -void ext3_abort (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext3_abort(struct super_block *sb, const char *function, + const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_CRIT "EXT3-fs (%s): error: %s: ", sb->s_id, function); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_CRIT "EXT3-fs (%s): error: %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); if (test_opt(sb, ERRORS_PANIC)) @@ -301,16 +314,20 @@ void ext3_abort (struct super_block * sb, const char * function, journal_abort(EXT3_SB(sb)->s_journal, -EIO); } -void ext3_warning (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext3_warning(struct super_block *sb, const char *function, + const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_WARNING "EXT3-fs (%s): warning: %s: ", - sb->s_id, function); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_WARNING "EXT3-fs (%s): warning: %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); } @@ -480,6 +497,13 @@ static struct inode *ext3_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } +static void ext3_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); +} + static void ext3_destroy_inode(struct inode *inode) { if (!list_empty(&(EXT3_I(inode)->i_orphan))) { @@ -490,7 +514,7 @@ static void ext3_destroy_inode(struct inode *inode) false); dump_stack(); } - kmem_cache_free(ext3_inode_cachep, EXT3_I(inode)); + call_rcu(&inode->i_rcu, ext3_i_callback); } static void init_once(void *foo) @@ -1842,13 +1866,15 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) goto failed_mount; } - if (generic_check_addressable(sb->s_blocksize_bits, - le32_to_cpu(es->s_blocks_count))) { + err = generic_check_addressable(sb->s_blocksize_bits, + le32_to_cpu(es->s_blocks_count)); + if (err) { ext3_msg(sb, KERN_ERR, "error: filesystem is too large to mount safely"); if (sizeof(sector_t) < 8) ext3_msg(sb, KERN_ERR, "error: CONFIG_LBDAF not enabled"); + ret = err; goto failed_mount; } @@ -2291,7 +2317,7 @@ static int ext3_load_journal(struct super_block *sb, EXT3_SB(sb)->s_journal = journal; ext3_clear_journal_err(sb, es); - if (journal_devnum && + if (!really_read_only && journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { es->s_journal_dev = cpu_to_le32(journal_devnum); @@ -3020,16 +3046,16 @@ out: #endif -static int ext3_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *ext3_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, ext3_fill_super); } static struct file_system_type ext3_fs_type = { .owner = THIS_MODULE, .name = "ext3", - .get_sb = ext3_get_sb, + .mount = ext3_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c index e69dc6d..32e6cc2 100644 --- a/fs/ext3/xattr.c +++ b/fs/ext3/xattr.c @@ -925,7 +925,7 @@ ext3_xattr_ibody_set(handle_t *handle, struct inode *inode, /* * ext3_xattr_set_handle() * - * Create, replace or remove an extended attribute for this inode. Buffer + * Create, replace or remove an extended attribute for this inode. Value * is NULL to remove an existing extended attribute, and non-NULL to * either replace an existing extended attribute, or create a new extended * attribute. The flags XATTR_REPLACE and XATTR_CREATE diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c index 5e2ed45..e0270d1 100644 --- a/fs/ext4/acl.c +++ b/fs/ext4/acl.c @@ -238,10 +238,17 @@ ext4_set_acl(handle_t *handle, struct inode *inode, int type, } int -ext4_check_acl(struct inode *inode, int mask) +ext4_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct posix_acl *acl = ext4_get_acl(inode, ACL_TYPE_ACCESS); + struct posix_acl *acl; + + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + return -ECHILD; + return -EAGAIN; + } + acl = ext4_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); if (acl) { diff --git a/fs/ext4/acl.h b/fs/ext4/acl.h index 9d843d5..dec8211 100644 --- a/fs/ext4/acl.h +++ b/fs/ext4/acl.h @@ -54,7 +54,7 @@ static inline int ext4_acl_count(size_t size) #ifdef CONFIG_EXT4_FS_POSIX_ACL /* acl.c */ -extern int ext4_check_acl(struct inode *, int); +extern int ext4_check_acl(struct inode *, int, unsigned int); extern int ext4_acl_chmod(struct inode *); extern int ext4_init_acl(handle_t *, struct inode *, struct inode *); diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index 14c3af2..adf96b8 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -592,7 +592,8 @@ ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, * Account for the allocated meta blocks. We will never * fail EDQUOT for metdata, but we do account for it. */ - if (!(*errp) && EXT4_I(inode)->i_delalloc_reserved_flag) { + if (!(*errp) && + ext4_test_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED)) { spin_lock(&EXT4_I(inode)->i_block_reservation_lock); EXT4_I(inode)->i_allocated_meta_blocks += ar.len; spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c index ece76fb..164c560 100644 --- a/fs/ext4/dir.c +++ b/fs/ext4/dir.c @@ -60,9 +60,13 @@ static unsigned char get_dtype(struct super_block *sb, int filetype) return (ext4_filetype_table[filetype]); } - +/* + * Return 0 if the directory entry is OK, and 1 if there is a problem + * + * Note: this is the opposite of what ext2 and ext3 historically returned... + */ int __ext4_check_dir_entry(const char *function, unsigned int line, - struct inode *dir, + struct inode *dir, struct file *filp, struct ext4_dir_entry_2 *de, struct buffer_head *bh, unsigned int offset) @@ -71,26 +75,37 @@ int __ext4_check_dir_entry(const char *function, unsigned int line, const int rlen = ext4_rec_len_from_disk(de->rec_len, dir->i_sb->s_blocksize); - if (rlen < EXT4_DIR_REC_LEN(1)) + if (unlikely(rlen < EXT4_DIR_REC_LEN(1))) error_msg = "rec_len is smaller than minimal"; - else if (rlen % 4 != 0) + else if (unlikely(rlen % 4 != 0)) error_msg = "rec_len % 4 != 0"; - else if (rlen < EXT4_DIR_REC_LEN(de->name_len)) + else if (unlikely(rlen < EXT4_DIR_REC_LEN(de->name_len))) error_msg = "rec_len is too small for name_len"; - else if (((char *) de - bh->b_data) + rlen > dir->i_sb->s_blocksize) + else if (unlikely(((char *) de - bh->b_data) + rlen > + dir->i_sb->s_blocksize)) error_msg = "directory entry across blocks"; - else if (le32_to_cpu(de->inode) > - le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count)) + else if (unlikely(le32_to_cpu(de->inode) > + le32_to_cpu(EXT4_SB(dir->i_sb)->s_es->s_inodes_count))) error_msg = "inode out of bounds"; + else + return 0; - if (error_msg != NULL) - ext4_error_inode(dir, function, line, bh->b_blocknr, - "bad entry in directory: %s - " - "offset=%u(%u), inode=%u, rec_len=%d, name_len=%d", - error_msg, (unsigned) (offset%bh->b_size), offset, - le32_to_cpu(de->inode), - rlen, de->name_len); - return error_msg == NULL ? 1 : 0; + if (filp) + ext4_error_file(filp, function, line, bh ? bh->b_blocknr : 0, + "bad entry in directory: %s - offset=%u(%u), " + "inode=%u, rec_len=%d, name_len=%d", + error_msg, (unsigned) (offset%bh->b_size), + offset, le32_to_cpu(de->inode), + rlen, de->name_len); + else + ext4_error_inode(dir, function, line, bh ? bh->b_blocknr : 0, + "bad entry in directory: %s - offset=%u(%u), " + "inode=%u, rec_len=%d, name_len=%d", + error_msg, (unsigned) (offset%bh->b_size), + offset, le32_to_cpu(de->inode), + rlen, de->name_len); + + return 1; } static int ext4_readdir(struct file *filp, @@ -152,8 +167,9 @@ static int ext4_readdir(struct file *filp, */ if (!bh) { if (!dir_has_error) { - EXT4_ERROR_INODE(inode, "directory " - "contains a hole at offset %Lu", + EXT4_ERROR_FILE(filp, 0, + "directory contains a " + "hole at offset %llu", (unsigned long long) filp->f_pos); dir_has_error = 1; } @@ -194,8 +210,8 @@ revalidate: while (!error && filp->f_pos < inode->i_size && offset < sb->s_blocksize) { de = (struct ext4_dir_entry_2 *) (bh->b_data + offset); - if (!ext4_check_dir_entry(inode, de, - bh, offset)) { + if (ext4_check_dir_entry(inode, filp, de, + bh, offset)) { /* * On error, skip the f_pos to the next block */ diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 8b5dd636..1de65f5 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -62,8 +62,8 @@ #define EXT4_ERROR_INODE_BLOCK(inode, block, fmt, a...) \ ext4_error_inode((inode), __func__, __LINE__, (block), (fmt), ## a) -#define EXT4_ERROR_FILE(file, fmt, a...) \ - ext4_error_file(__func__, __LINE__, (file), (fmt), ## a) +#define EXT4_ERROR_FILE(file, block, fmt, a...) \ + ext4_error_file((file), __func__, __LINE__, (block), (fmt), ## a) /* data type for block offset of block group */ typedef int ext4_grpblk_t; @@ -177,7 +177,7 @@ struct mpage_da_data { struct ext4_io_page { struct page *p_page; - int p_count; + atomic_t p_count; }; #define MAX_IO_PAGES 128 @@ -561,23 +561,7 @@ struct ext4_new_group_data { #define EXT4_IOC32_SETVERSION_OLD FS_IOC32_SETVERSION #endif - -/* - * Mount options - */ -struct ext4_mount_options { - unsigned long s_mount_opt; - uid_t s_resuid; - gid_t s_resgid; - unsigned long s_commit_interval; - u32 s_min_batch_time, s_max_batch_time; -#ifdef CONFIG_QUOTA - int s_jquota_fmt; - char *s_qf_names[MAXQUOTAS]; -#endif -}; - -/* Max physical block we can addres w/o extents */ +/* Max physical block we can address w/o extents */ #define EXT4_MAX_BLOCK_FILE_PHYS 0xFFFFFFFF /* @@ -709,6 +693,8 @@ do { \ if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra)) \ ext4_decode_extra_time(&(inode)->xtime, \ raw_inode->xtime ## _extra); \ + else \ + (inode)->xtime.tv_nsec = 0; \ } while (0) #define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode) \ @@ -719,6 +705,8 @@ do { \ if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra)) \ ext4_decode_extra_time(&(einode)->xtime, \ raw_inode->xtime ## _extra); \ + else \ + (einode)->xtime.tv_nsec = 0; \ } while (0) #define i_disk_version osd1.linux1.l_i_version @@ -750,12 +738,13 @@ do { \ /* * storage for cached extent + * If ec_len == 0, then the cache is invalid. + * If ec_start == 0, then the cache represents a gap (null mapping) */ struct ext4_ext_cache { ext4_fsblk_t ec_start; ext4_lblk_t ec_block; __u32 ec_len; /* must be 32bit to return holes */ - __u32 ec_type; }; /* @@ -774,10 +763,12 @@ struct ext4_inode_info { * near to their parent directory's inode. */ ext4_group_t i_block_group; + ext4_lblk_t i_dir_start_lookup; +#if (BITS_PER_LONG < 64) unsigned long i_state_flags; /* Dynamic state flags */ +#endif unsigned long i_flags; - ext4_lblk_t i_dir_start_lookup; #ifdef CONFIG_EXT4_FS_XATTR /* * Extended attributes can be read independently of the main file @@ -820,7 +811,7 @@ struct ext4_inode_info { */ struct rw_semaphore i_data_sem; struct inode vfs_inode; - struct jbd2_inode jinode; + struct jbd2_inode *jinode; struct ext4_ext_cache i_cached_extent; /* @@ -840,14 +831,12 @@ struct ext4_inode_info { unsigned int i_reserved_data_blocks; unsigned int i_reserved_meta_blocks; unsigned int i_allocated_meta_blocks; - unsigned short i_delalloc_reserved_flag; - sector_t i_da_metadata_calc_last_lblock; + ext4_lblk_t i_da_metadata_calc_last_lblock; int i_da_metadata_calc_len; /* on-disk additional length */ __u16 i_extra_isize; - spinlock_t i_block_reservation_lock; #ifdef CONFIG_QUOTA /* quota space reservation, managed internally by quota code */ qsize_t i_reserved_quota; @@ -856,9 +845,12 @@ struct ext4_inode_info { /* completed IOs that might need unwritten extents handling */ struct list_head i_completed_io_list; spinlock_t i_completed_io_lock; + atomic_t i_ioend_count; /* Number of outstanding io_end structs */ /* current io_end structure for async DIO write*/ ext4_io_end_t *cur_aio_dio; + spinlock_t i_block_reservation_lock; + /* * Transactions that contain inode's metadata needed to complete * fsync and fdatasync, respectively. @@ -909,17 +901,27 @@ struct ext4_inode_info { #define EXT4_MOUNT_JOURNAL_CHECKSUM 0x800000 /* Journal checksums */ #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT 0x1000000 /* Journal Async Commit */ #define EXT4_MOUNT_I_VERSION 0x2000000 /* i_version support */ +#define EXT4_MOUNT_MBLK_IO_SUBMIT 0x4000000 /* multi-block io submits */ #define EXT4_MOUNT_DELALLOC 0x8000000 /* Delalloc support */ #define EXT4_MOUNT_DATA_ERR_ABORT 0x10000000 /* Abort on file data write */ #define EXT4_MOUNT_BLOCK_VALIDITY 0x20000000 /* Block validity checking */ #define EXT4_MOUNT_DISCARD 0x40000000 /* Issue DISCARD requests */ #define EXT4_MOUNT_INIT_INODE_TABLE 0x80000000 /* Initialize uninitialized itables */ -#define clear_opt(o, opt) o &= ~EXT4_MOUNT_##opt -#define set_opt(o, opt) o |= EXT4_MOUNT_##opt +#define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ + ~EXT4_MOUNT_##opt +#define set_opt(sb, opt) EXT4_SB(sb)->s_mount_opt |= \ + EXT4_MOUNT_##opt #define test_opt(sb, opt) (EXT4_SB(sb)->s_mount_opt & \ EXT4_MOUNT_##opt) +#define clear_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 &= \ + ~EXT4_MOUNT2_##opt +#define set_opt2(sb, opt) EXT4_SB(sb)->s_mount_opt2 |= \ + EXT4_MOUNT2_##opt +#define test_opt2(sb, opt) (EXT4_SB(sb)->s_mount_opt2 & \ + EXT4_MOUNT2_##opt) + #define ext4_set_bit ext2_set_bit #define ext4_set_bit_atomic ext2_set_bit_atomic #define ext4_clear_bit ext2_clear_bit @@ -1085,6 +1087,7 @@ struct ext4_sb_info { struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ struct buffer_head **s_group_desc; unsigned int s_mount_opt; + unsigned int s_mount_opt2; unsigned int s_mount_flags; ext4_fsblk_t s_sb_block; uid_t s_resuid; @@ -1235,24 +1238,39 @@ enum { EXT4_STATE_EXT_MIGRATE, /* Inode is migrating */ EXT4_STATE_DIO_UNWRITTEN, /* need convert on dio done*/ EXT4_STATE_NEWENTRY, /* File just added to dir */ + EXT4_STATE_DELALLOC_RESERVED, /* blks already reserved for delalloc */ }; -#define EXT4_INODE_BIT_FNS(name, field) \ +#define EXT4_INODE_BIT_FNS(name, field, offset) \ static inline int ext4_test_inode_##name(struct inode *inode, int bit) \ { \ - return test_bit(bit, &EXT4_I(inode)->i_##field); \ + return test_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ } \ static inline void ext4_set_inode_##name(struct inode *inode, int bit) \ { \ - set_bit(bit, &EXT4_I(inode)->i_##field); \ + set_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ } \ static inline void ext4_clear_inode_##name(struct inode *inode, int bit) \ { \ - clear_bit(bit, &EXT4_I(inode)->i_##field); \ + clear_bit(bit + (offset), &EXT4_I(inode)->i_##field); \ +} + +EXT4_INODE_BIT_FNS(flag, flags, 0) +#if (BITS_PER_LONG < 64) +EXT4_INODE_BIT_FNS(state, state_flags, 0) + +static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) +{ + (ei)->i_state_flags = 0; } +#else +EXT4_INODE_BIT_FNS(state, flags, 32) -EXT4_INODE_BIT_FNS(flag, flags) -EXT4_INODE_BIT_FNS(state, state_flags) +static inline void ext4_clear_state_flags(struct ext4_inode_info *ei) +{ + /* We depend on the fact that callers will set i_flags */ +} +#endif #else /* Assume that user mode programs are passing in an ext4fs superblock, not * a kernel struct super_block. This will allow us to call the feature-test @@ -1640,10 +1658,12 @@ extern unsigned ext4_init_block_bitmap(struct super_block *sb, /* dir.c */ extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *, + struct file *, struct ext4_dir_entry_2 *, struct buffer_head *, unsigned int); -#define ext4_check_dir_entry(dir, de, bh, offset) \ - __ext4_check_dir_entry(__func__, __LINE__, (dir), (de), (bh), (offset)) +#define ext4_check_dir_entry(dir, filp, de, bh, offset) \ + unlikely(__ext4_check_dir_entry(__func__, __LINE__, (dir), (filp), \ + (de), (bh), (offset))) extern int ext4_htree_store_dirent(struct file *dir_file, __u32 hash, __u32 minor_hash, struct ext4_dir_entry_2 *dirent); @@ -1651,6 +1671,7 @@ extern void ext4_htree_free_dir_info(struct dir_private_info *p); /* fsync.c */ extern int ext4_sync_file(struct file *, int); +extern int ext4_flush_completed_IO(struct inode *); /* hash.c */ extern int ext4fs_dirhash(const char *name, int len, struct @@ -1750,8 +1771,8 @@ extern void ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t, const char *, ...) __attribute__ ((format (printf, 5, 6))); extern void ext4_error_file(struct file *, const char *, unsigned int, - const char *, ...) - __attribute__ ((format (printf, 4, 5))); + ext4_fsblk_t, const char *, ...) + __attribute__ ((format (printf, 5, 6))); extern void __ext4_std_error(struct super_block *, const char *, unsigned int, int); extern void __ext4_abort(struct super_block *, const char *, unsigned int, @@ -2060,6 +2081,7 @@ extern int ext4_move_extents(struct file *o_filp, struct file *d_filp, /* page-io.c */ extern int __init ext4_init_pageio(void); extern void ext4_exit_pageio(void); +extern void ext4_ioend_wait(struct inode *); extern void ext4_free_io_end(ext4_io_end_t *io); extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags); extern int ext4_end_io_nolock(ext4_io_end_t *io); diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index 28ce70f..2e29abb 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -119,10 +119,6 @@ struct ext4_ext_path { * structure for external API */ -#define EXT4_EXT_CACHE_NO 0 -#define EXT4_EXT_CACHE_GAP 1 -#define EXT4_EXT_CACHE_EXTENT 2 - /* * to be called by ext4_ext_walk_space() * negative retcode - error @@ -197,7 +193,7 @@ static inline unsigned short ext_depth(struct inode *inode) static inline void ext4_ext_invalidate_cache(struct inode *inode) { - EXT4_I(inode)->i_cached_extent.ec_type = EXT4_EXT_CACHE_NO; + EXT4_I(inode)->i_cached_extent.ec_len = 0; } static inline void ext4_ext_mark_uninitialized(struct ext4_extent *ext) @@ -278,7 +274,7 @@ static inline void ext4_idx_store_pblock(struct ext4_extent_idx *ix, } extern int ext4_ext_calc_metadata_amount(struct inode *inode, - sector_t lblocks); + ext4_lblk_t lblocks); extern int ext4_extent_tree_init(handle_t *, struct inode *); extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode, int num, diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h index b0bd792..d8b992e 100644 --- a/fs/ext4/ext4_jbd2.h +++ b/fs/ext4/ext4_jbd2.h @@ -253,7 +253,7 @@ static inline int ext4_journal_force_commit(journal_t *journal) static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode) { if (ext4_handle_valid(handle)) - return jbd2_journal_file_inode(handle, &EXT4_I(inode)->jinode); + return jbd2_journal_file_inode(handle, EXT4_I(inode)->jinode); return 0; } diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 0554c48..d202d76 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -117,11 +117,33 @@ static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode, struct ext4_extent *ex; depth = path->p_depth; - /* try to predict block placement */ + /* + * Try to predict block placement assuming that we are + * filling in a file which will eventually be + * non-sparse --- i.e., in the case of libbfd writing + * an ELF object sections out-of-order but in a way + * the eventually results in a contiguous object or + * executable file, or some database extending a table + * space file. However, this is actually somewhat + * non-ideal if we are writing a sparse file such as + * qemu or KVM writing a raw image file that is going + * to stay fairly sparse, since it will end up + * fragmenting the file system's free space. Maybe we + * should have some hueristics or some way to allow + * userspace to pass a hint to file system, + * especiially if the latter case turns out to be + * common. + */ ex = path[depth].p_ext; - if (ex) - return (ext4_ext_pblock(ex) + - (block - le32_to_cpu(ex->ee_block))); + if (ex) { + ext4_fsblk_t ext_pblk = ext4_ext_pblock(ex); + ext4_lblk_t ext_block = le32_to_cpu(ex->ee_block); + + if (block > ext_block) + return ext_pblk + (block - ext_block); + else + return ext_pblk - (ext_block - block); + } /* it looks like index is empty; * try to find starting block from index itself */ @@ -244,7 +266,7 @@ static inline int ext4_ext_space_root_idx(struct inode *inode, int check) * to allocate @blocks * Worse case is one block per extent */ -int ext4_ext_calc_metadata_amount(struct inode *inode, sector_t lblock) +int ext4_ext_calc_metadata_amount(struct inode *inode, ext4_lblk_t lblock) { struct ext4_inode_info *ei = EXT4_I(inode); int idxs, num = 0; @@ -1872,12 +1894,10 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block, cbex.ec_block = start; cbex.ec_len = end - start; cbex.ec_start = 0; - cbex.ec_type = EXT4_EXT_CACHE_GAP; } else { cbex.ec_block = le32_to_cpu(ex->ee_block); cbex.ec_len = ext4_ext_get_actual_len(ex); cbex.ec_start = ext4_ext_pblock(ex); - cbex.ec_type = EXT4_EXT_CACHE_EXTENT; } if (unlikely(cbex.ec_len == 0)) { @@ -1917,13 +1937,12 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block, static void ext4_ext_put_in_cache(struct inode *inode, ext4_lblk_t block, - __u32 len, ext4_fsblk_t start, int type) + __u32 len, ext4_fsblk_t start) { struct ext4_ext_cache *cex; BUG_ON(len == 0); spin_lock(&EXT4_I(inode)->i_block_reservation_lock); cex = &EXT4_I(inode)->i_cached_extent; - cex->ec_type = type; cex->ec_block = block; cex->ec_len = len; cex->ec_start = start; @@ -1976,15 +1995,18 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path, } ext_debug(" -> %u:%lu\n", lblock, len); - ext4_ext_put_in_cache(inode, lblock, len, 0, EXT4_EXT_CACHE_GAP); + ext4_ext_put_in_cache(inode, lblock, len, 0); } +/* + * Return 0 if cache is invalid; 1 if the cache is valid + */ static int ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, struct ext4_extent *ex) { struct ext4_ext_cache *cex; - int ret = EXT4_EXT_CACHE_NO; + int ret = 0; /* * We borrow i_block_reservation_lock to protect i_cached_extent @@ -1993,11 +2015,9 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, cex = &EXT4_I(inode)->i_cached_extent; /* has cache valid data? */ - if (cex->ec_type == EXT4_EXT_CACHE_NO) + if (cex->ec_len == 0) goto errout; - BUG_ON(cex->ec_type != EXT4_EXT_CACHE_GAP && - cex->ec_type != EXT4_EXT_CACHE_EXTENT); if (in_range(block, cex->ec_block, cex->ec_len)) { ex->ee_block = cpu_to_le32(cex->ec_block); ext4_ext_store_pblock(ex, cex->ec_start); @@ -2005,7 +2025,7 @@ ext4_ext_in_cache(struct inode *inode, ext4_lblk_t block, ext_debug("%u cached by %u:%u:%llu\n", block, cex->ec_block, cex->ec_len, cex->ec_start); - ret = cex->ec_type; + ret = 1; } errout: spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); @@ -2825,14 +2845,14 @@ fix_extent_len: * to an uninitialized extent. * * Writing to an uninitized extent may result in splitting the uninitialized - * extent into multiple /intialized unintialized extents (up to three) + * extent into multiple /initialized uninitialized extents (up to three) * There are three possibilities: * a> There is no split required: Entire extent should be uninitialized * b> Splits in two extents: Write is happening at either end of the extent * c> Splits in three extents: Somone is writing in middle of the extent * * One of more index blocks maybe needed if the extent tree grow after - * the unintialized extent split. To prevent ENOSPC occur at the IO + * the uninitialized extent split. To prevent ENOSPC occur at the IO * complete, we need to split the uninitialized extent before DIO submit * the IO. The uninitialized extent called at this time will be split * into three uninitialized extent(at most). After IO complete, the part @@ -3082,7 +3102,7 @@ static void unmap_underlying_metadata_blocks(struct block_device *bdev, * Handle EOFBLOCKS_FL flag, clearing it if necessary */ static int check_eofblocks_fl(handle_t *handle, struct inode *inode, - struct ext4_map_blocks *map, + ext4_lblk_t lblk, struct ext4_ext_path *path, unsigned int len) { @@ -3112,7 +3132,7 @@ static int check_eofblocks_fl(handle_t *handle, struct inode *inode, * this turns out to be false, we can bail out from this * function immediately. */ - if (map->m_lblk + len < le32_to_cpu(last_ex->ee_block) + + if (lblk + len < le32_to_cpu(last_ex->ee_block) + ext4_ext_get_actual_len(last_ex)) return 0; /* @@ -3168,8 +3188,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, path); if (ret >= 0) { ext4_update_inode_fsync_trans(handle, inode, 1); - err = check_eofblocks_fl(handle, inode, map, path, - map->m_len); + err = check_eofblocks_fl(handle, inode, map->m_lblk, + path, map->m_len); } else err = ret; goto out2; @@ -3199,7 +3219,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode, ret = ext4_ext_convert_to_initialized(handle, inode, map, path); if (ret >= 0) { ext4_update_inode_fsync_trans(handle, inode, 1); - err = check_eofblocks_fl(handle, inode, map, path, map->m_len); + err = check_eofblocks_fl(handle, inode, map->m_lblk, path, + map->m_len); if (err < 0) goto out2; } @@ -3276,7 +3297,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, struct ext4_extent_header *eh; struct ext4_extent newex, *ex; ext4_fsblk_t newblock; - int err = 0, depth, ret, cache_type; + int err = 0, depth, ret; unsigned int allocated = 0; struct ext4_allocation_request ar; ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio; @@ -3285,9 +3306,8 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, map->m_lblk, map->m_len, inode->i_ino); /* check in cache */ - cache_type = ext4_ext_in_cache(inode, map->m_lblk, &newex); - if (cache_type) { - if (cache_type == EXT4_EXT_CACHE_GAP) { + if (ext4_ext_in_cache(inode, map->m_lblk, &newex)) { + if (!newex.ee_start_lo && !newex.ee_start_hi) { if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) { /* * block isn't allocated yet and @@ -3296,7 +3316,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, goto out2; } /* we should allocate requested block */ - } else if (cache_type == EXT4_EXT_CACHE_EXTENT) { + } else { /* block is already allocated */ newblock = map->m_lblk - le32_to_cpu(newex.ee_block) @@ -3305,8 +3325,6 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, allocated = ext4_ext_get_actual_len(&newex) - (map->m_lblk - le32_to_cpu(newex.ee_block)); goto out; - } else { - BUG(); } } @@ -3357,8 +3375,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, /* Do not put uninitialized extent in the cache */ if (!ext4_ext_is_uninitialized(ex)) { ext4_ext_put_in_cache(inode, ee_block, - ee_len, ee_start, - EXT4_EXT_CACHE_EXTENT); + ee_len, ee_start); goto out; } ret = ext4_ext_handle_uninitialized_extents(handle, @@ -3456,7 +3473,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, map->m_flags |= EXT4_MAP_UNINIT; } - err = check_eofblocks_fl(handle, inode, map, path, ar.len); + err = check_eofblocks_fl(handle, inode, map->m_lblk, path, ar.len); if (err) goto out2; @@ -3490,8 +3507,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, * when it is _not_ an uninitialized extent. */ if ((flags & EXT4_GET_BLOCKS_UNINIT_EXT) == 0) { - ext4_ext_put_in_cache(inode, map->m_lblk, allocated, newblock, - EXT4_EXT_CACHE_EXTENT); + ext4_ext_put_in_cache(inode, map->m_lblk, allocated, newblock); ext4_update_inode_fsync_trans(handle, inode, 1); } else ext4_update_inode_fsync_trans(handle, inode, 0); @@ -3519,6 +3535,12 @@ void ext4_ext_truncate(struct inode *inode) int err = 0; /* + * finish any pending end_io work so we won't run the risk of + * converting any truncated blocks to initialized later + */ + ext4_flush_completed_IO(inode); + + /* * probably first extent we're gonna free will be last in block */ err = ext4_writepage_trans_blocks(inode); @@ -3767,7 +3789,7 @@ static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path, logical = (__u64)newex->ec_block << blksize_bits; - if (newex->ec_type == EXT4_EXT_CACHE_GAP) { + if (newex->ec_start == 0) { pgoff_t offset; struct page *page; struct buffer_head *bh = NULL; diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 5a5c55d..bb003dc 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -104,6 +104,7 @@ static int ext4_file_open(struct inode * inode, struct file * filp) { struct super_block *sb = inode->i_sb; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); + struct ext4_inode_info *ei = EXT4_I(inode); struct vfsmount *mnt = filp->f_path.mnt; struct path path; char buf[64], *cp; @@ -127,6 +128,27 @@ static int ext4_file_open(struct inode * inode, struct file * filp) ext4_mark_super_dirty(sb); } } + /* + * Set up the jbd2_inode if we are opening the inode for + * writing and the journal is present + */ + if (sbi->s_journal && !ei->jinode && (filp->f_mode & FMODE_WRITE)) { + struct jbd2_inode *jinode = jbd2_alloc_inode(GFP_KERNEL); + + spin_lock(&inode->i_lock); + if (!ei->jinode) { + if (!jinode) { + spin_unlock(&inode->i_lock); + return -ENOMEM; + } + ei->jinode = jinode; + jbd2_journal_init_jbd_inode(ei->jinode, inode); + jinode = NULL; + } + spin_unlock(&inode->i_lock); + if (unlikely(jinode != NULL)) + jbd2_free_inode(jinode); + } return dquot_file_open(inode, filp); } diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c index c1a7bc9..7829b28 100644 --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -75,7 +75,7 @@ static void dump_completed_IO(struct inode * inode) * to written. * The function return the number of pending IOs on success. */ -static int flush_completed_IO(struct inode *inode) +extern int ext4_flush_completed_IO(struct inode *inode) { ext4_io_end_t *io; struct ext4_inode_info *ei = EXT4_I(inode); @@ -169,7 +169,7 @@ int ext4_sync_file(struct file *file, int datasync) if (inode->i_sb->s_flags & MS_RDONLY) return 0; - ret = flush_completed_IO(inode); + ret = ext4_flush_completed_IO(inode); if (ret < 0) return ret; diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 1ce240a..eb9097a 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -1027,7 +1027,7 @@ got: inode->i_generation = sbi->s_next_generation++; spin_unlock(&sbi->s_next_gen_lock); - ei->i_state_flags = 0; + ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ ext4_set_inode_state(inode, EXT4_STATE_NEW); ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2d6c6c8..9f7f9e4 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -39,7 +39,9 @@ #include <linux/bio.h> #include <linux/workqueue.h> #include <linux/kernel.h> +#include <linux/printk.h> #include <linux/slab.h> +#include <linux/ratelimit.h> #include "ext4_jbd2.h" #include "xattr.h" @@ -53,10 +55,18 @@ static inline int ext4_begin_ordered_truncate(struct inode *inode, loff_t new_size) { - return jbd2_journal_begin_ordered_truncate( - EXT4_SB(inode->i_sb)->s_journal, - &EXT4_I(inode)->jinode, - new_size); + trace_ext4_begin_ordered_truncate(inode, new_size); + /* + * If jinode is zero, then we never opened the file for + * writing, so there's no need to call + * jbd2_journal_begin_ordered_truncate() since there's no + * outstanding writes we need to flush. + */ + if (!EXT4_I(inode)->jinode) + return 0; + return jbd2_journal_begin_ordered_truncate(EXT4_JOURNAL(inode), + EXT4_I(inode)->jinode, + new_size); } static void ext4_invalidatepage(struct page *page, unsigned long offset); @@ -178,6 +188,7 @@ void ext4_evict_inode(struct inode *inode) handle_t *handle; int err; + trace_ext4_evict_inode(inode); if (inode->i_nlink) { truncate_inode_pages(&inode->i_data, 0); goto no_delete; @@ -550,7 +561,7 @@ static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block, } /** - * ext4_blks_to_allocate: Look up the block map and count the number + * ext4_blks_to_allocate - Look up the block map and count the number * of direct blocks need to be allocated for the given branch. * * @branch: chain of indirect blocks @@ -589,13 +600,19 @@ static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned int blks, /** * ext4_alloc_blocks: multiple allocate blocks needed for a branch + * @handle: handle for this transaction + * @inode: inode which needs allocated blocks + * @iblock: the logical block to start allocated at + * @goal: preferred physical block of allocation * @indirect_blks: the number of blocks need to allocate for indirect * blocks - * + * @blks: number of desired blocks * @new_blocks: on return it will store the new block numbers for * the indirect blocks(if needed) and the first direct block, - * @blks: on return it will store the total number of allocated - * direct blocks + * @err: on return it will store the error code + * + * This function will return the number of blocks allocated as + * requested by the passed-in parameters. */ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode, ext4_lblk_t iblock, ext4_fsblk_t goal, @@ -709,9 +726,11 @@ failed_out: /** * ext4_alloc_branch - allocate and set up a chain of blocks. + * @handle: handle for this transaction * @inode: owner * @indirect_blks: number of allocated indirect blocks * @blks: number of allocated direct blocks + * @goal: preferred place for allocation * @offsets: offsets (in the blocks) to store the pointers to next. * @branch: place to store the chain in. * @@ -824,6 +843,7 @@ failed: /** * ext4_splice_branch - splice the allocated branch onto inode. + * @handle: handle for this transaction * @inode: owner * @block: (logical) number of block we are adding * @chain: chain of indirect blocks (with a missing link - see @@ -1079,7 +1099,7 @@ static int ext4_indirect_calc_metadata_amount(struct inode *inode, * Calculate the number of metadata blocks need to reserve * to allocate a block located at @lblock */ -static int ext4_calc_metadata_amount(struct inode *inode, sector_t lblock) +static int ext4_calc_metadata_amount(struct inode *inode, ext4_lblk_t lblock) { if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) return ext4_ext_calc_metadata_amount(inode, lblock); @@ -1318,7 +1338,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, * avoid double accounting */ if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) - EXT4_I(inode)->i_delalloc_reserved_flag = 1; + ext4_set_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED); /* * We need to check for EXT4 here because migrate * could have changed the inode type in between @@ -1348,7 +1368,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, ext4_da_update_reserve_space(inode, retval, 1); } if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) - EXT4_I(inode)->i_delalloc_reserved_flag = 0; + ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED); up_write((&EXT4_I(inode)->i_data_sem)); if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { @@ -1876,7 +1896,7 @@ static int ext4_journalled_write_end(struct file *file, /* * Reserve a single block located at lblock */ -static int ext4_da_reserve_space(struct inode *inode, sector_t lblock) +static int ext4_da_reserve_space(struct inode *inode, ext4_lblk_t lblock) { int retries = 0; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); @@ -2123,9 +2143,12 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd, */ if (unlikely(journal_data && PageChecked(page))) err = __ext4_journalled_writepage(page, len); - else + else if (test_opt(inode->i_sb, MBLK_IO_SUBMIT)) err = ext4_bio_write_page(&io_submit, page, len, mpd->wbc); + else + err = block_write_full_page(page, + noalloc_get_block_write, mpd->wbc); if (!err) mpd->pages_written++; @@ -2234,7 +2257,7 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd) * affects functions in many different parts of the allocation * call path. This flag exists primarily because we don't * want to change *many* call functions, so ext4_map_blocks() - * will set the magic i_delalloc_reserved_flag once the + * will set the EXT4_STATE_DELALLOC_RESERVED flag once the * inode's allocation semaphore is taken. * * If the blocks in questions were delalloc blocks, set @@ -2718,7 +2741,7 @@ static int ext4_writepage(struct page *page, * try to create them using __block_write_begin. If this * fails, redirty the page and move on. */ - if (!page_buffers(page)) { + if (!page_has_buffers(page)) { if (__block_write_begin(page, 0, len, noalloc_get_block_write)) { redirty_page: @@ -2732,12 +2755,10 @@ static int ext4_writepage(struct page *page, if (walk_page_buffers(NULL, page_bufs, 0, len, NULL, ext4_bh_delay_or_unwritten)) { /* - * We don't want to do block allocation So redirty the - * page and return We may reach here when we do a - * journal commit via - * journal_submit_inode_data_buffers. If we don't - * have mapping block we just ignore them. We can also - * reach here via shrink_page_list + * We don't want to do block allocation, so redirty + * the page and return. We may reach here when we do + * a journal commit via journal_submit_inode_data_buffers. + * We can also reach here via shrink_page_list */ goto redirty_page; } @@ -3359,7 +3380,7 @@ int ext4_alloc_da_blocks(struct inode *inode) * doing I/O at all. * * We could call write_cache_pages(), and then redirty all of - * the pages by calling redirty_page_for_writeback() but that + * the pages by calling redirty_page_for_writepage() but that * would be ugly in the extreme. So instead we would need to * replicate parts of the code in the above functions, * simplifying them becuase we wouldn't actually intend to @@ -3717,8 +3738,7 @@ static int ext4_set_bh_endio(struct buffer_head *bh, struct inode *inode) retry: io_end = ext4_init_io_end(inode, GFP_ATOMIC); if (!io_end) { - if (printk_ratelimit()) - printk(KERN_WARNING "%s: allocation fail\n", __func__); + pr_warn_ratelimited("%s: allocation fail\n", __func__); schedule(); goto retry; } @@ -3742,9 +3762,9 @@ retry: * preallocated extents, and those write extend the file, no need to * fall back to buffered IO. * - * For holes, we fallocate those blocks, mark them as unintialized + * For holes, we fallocate those blocks, mark them as uninitialized * If those blocks were preallocated, we mark sure they are splited, but - * still keep the range to write as unintialized. + * still keep the range to write as uninitialized. * * The unwrritten extents will be converted to written when DIO is completed. * For async direct IO, since the IO may still pending when return, we @@ -4042,7 +4062,7 @@ int ext4_block_truncate_page(handle_t *handle, if (ext4_should_journal_data(inode)) { err = ext4_handle_dirty_metadata(handle, inode, bh); } else { - if (ext4_should_order_data(inode)) + if (ext4_should_order_data(inode) && EXT4_I(inode)->jinode) err = ext4_jbd2_file_inode(handle, inode); mark_buffer_dirty(bh); } @@ -4166,6 +4186,7 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode, { __le32 *p; int flags = EXT4_FREE_BLOCKS_FORGET | EXT4_FREE_BLOCKS_VALIDATED; + int err; if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) flags |= EXT4_FREE_BLOCKS_METADATA; @@ -4181,11 +4202,23 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode, if (try_to_extend_transaction(handle, inode)) { if (bh) { BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); - ext4_handle_dirty_metadata(handle, inode, bh); + err = ext4_handle_dirty_metadata(handle, inode, bh); + if (unlikely(err)) { + ext4_std_error(inode->i_sb, err); + return 1; + } + } + err = ext4_mark_inode_dirty(handle, inode); + if (unlikely(err)) { + ext4_std_error(inode->i_sb, err); + return 1; + } + err = ext4_truncate_restart_trans(handle, inode, + blocks_for_truncate(inode)); + if (unlikely(err)) { + ext4_std_error(inode->i_sb, err); + return 1; } - ext4_mark_inode_dirty(handle, inode); - ext4_truncate_restart_trans(handle, inode, - blocks_for_truncate(inode)); if (bh) { BUFFER_TRACE(bh, "retaking write access"); ext4_journal_get_write_access(handle, bh); @@ -4346,6 +4379,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode, (__le32 *) bh->b_data, (__le32 *) bh->b_data + addr_per_block, depth); + brelse(bh); /* * Everything below this this pointer has been @@ -4856,7 +4890,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino) } inode->i_nlink = le16_to_cpu(raw_inode->i_links_count); - ei->i_state_flags = 0; + ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ ei->i_dir_start_lookup = 0; ei->i_dtime = le32_to_cpu(raw_inode->i_dtime); /* We now have enough fields to check if the inode was active or not. @@ -5115,7 +5149,7 @@ static int ext4_do_update_inode(handle_t *handle, if (ext4_inode_blocks_set(handle, raw_inode, ei)) goto out_brelse; raw_inode->i_dtime = cpu_to_le32(ei->i_dtime); - raw_inode->i_flags = cpu_to_le32(ei->i_flags); + raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF); if (EXT4_SB(inode->i_sb)->s_es->s_creator_os != cpu_to_le32(EXT4_OS_HURD)) raw_inode->i_file_acl_high = @@ -5412,9 +5446,7 @@ int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, * will return the blocks that include the delayed allocation * blocks for this file. */ - spin_lock(&EXT4_I(inode)->i_block_reservation_lock); delalloc_blocks = EXT4_I(inode)->i_reserved_data_blocks; - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); stat->blocks += (delalloc_blocks << inode->i_sb->s_blocksize_bits)>>9; return 0; @@ -5651,6 +5683,7 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode) int err, ret; might_sleep(); + trace_ext4_mark_inode_dirty(inode, _RET_IP_); err = ext4_reserve_inode_write(handle, inode, &iloc); if (ext4_handle_valid(handle) && EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize && diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index bf5ae88..eb3bc2f 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -331,6 +331,30 @@ mext_out: return err; } + case FITRIM: + { + struct super_block *sb = inode->i_sb; + struct fstrim_range range; + int ret = 0; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (copy_from_user(&range, (struct fstrim_range *)arg, + sizeof(range))) + return -EFAULT; + + ret = ext4_trim_fs(sb, &range); + if (ret < 0) + return ret; + + if (copy_to_user((struct fstrim_range *)arg, &range, + sizeof(range))) + return -EFAULT; + + return 0; + } + default: return -ENOTTY; } diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index c58eba34..851f49b 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -2608,18 +2608,12 @@ int ext4_mb_release(struct super_block *sb) static inline int ext4_issue_discard(struct super_block *sb, ext4_group_t block_group, ext4_grpblk_t block, int count) { - int ret; ext4_fsblk_t discard_block; discard_block = block + ext4_group_first_block_no(sb, block_group); trace_ext4_discard_blocks(sb, (unsigned long long) discard_block, count); - ret = sb_issue_discard(sb, discard_block, count, GFP_NOFS, 0); - if (ret == -EOPNOTSUPP) { - ext4_warning(sb, "discard not supported, disabling"); - clear_opt(EXT4_SB(sb)->s_mount_opt, DISCARD); - } - return ret; + return sb_issue_discard(sb, discard_block, count, GFP_NOFS, 0); } /* @@ -2631,7 +2625,7 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn) struct super_block *sb = journal->j_private; struct ext4_buddy e4b; struct ext4_group_info *db; - int err, count = 0, count2 = 0; + int err, ret, count = 0, count2 = 0; struct ext4_free_data *entry; struct list_head *l, *ltmp; @@ -2641,9 +2635,15 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn) mb_debug(1, "gonna free %u blocks in group %u (0x%p):", entry->count, entry->group, entry); - if (test_opt(sb, DISCARD)) - ext4_issue_discard(sb, entry->group, + if (test_opt(sb, DISCARD)) { + ret = ext4_issue_discard(sb, entry->group, entry->start_blk, entry->count); + if (unlikely(ret == -EOPNOTSUPP)) { + ext4_warning(sb, "discard not supported, " + "disabling"); + clear_opt(sb, DISCARD); + } + } err = ext4_mb_load_buddy(sb, entry->group, &e4b); /* we expect to find existing buddy because it's pinned */ @@ -3881,19 +3881,6 @@ repeat: } } -/* - * finds all preallocated spaces and return blocks being freed to them - * if preallocated space becomes full (no block is used from the space) - * then the function frees space in buddy - * XXX: at the moment, truncate (which is the only way to free blocks) - * discards all preallocations - */ -static void ext4_mb_return_to_preallocation(struct inode *inode, - struct ext4_buddy *e4b, - sector_t block, int count) -{ - BUG_ON(!list_empty(&EXT4_I(inode)->i_prealloc_list)); -} #ifdef CONFIG_EXT4_DEBUG static void ext4_mb_show_ac(struct ext4_allocation_context *ac) { @@ -4283,7 +4270,7 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, * EDQUOT check, as blocks and quotas have been already * reserved when data being copied into pagecache. */ - if (EXT4_I(ar->inode)->i_delalloc_reserved_flag) + if (ext4_test_inode_state(ar->inode, EXT4_STATE_DELALLOC_RESERVED)) ar->flags |= EXT4_MB_DELALLOC_RESERVED; else { /* Without delayed allocation we need to verify @@ -4380,7 +4367,8 @@ out: if (inquota && ar->len < inquota) dquot_free_block(ar->inode, inquota - ar->len); if (!ar->len) { - if (!EXT4_I(ar->inode)->i_delalloc_reserved_flag) + if (!ext4_test_inode_state(ar->inode, + EXT4_STATE_DELALLOC_RESERVED)) /* release all the reserved blocks if non delalloc */ percpu_counter_sub(&sbi->s_dirtyblocks_counter, reserv_blks); @@ -4626,7 +4614,11 @@ do_more: * blocks being freed are metadata. these blocks shouldn't * be used until this transaction is committed */ - new_entry = kmem_cache_alloc(ext4_free_ext_cachep, GFP_NOFS); + new_entry = kmem_cache_alloc(ext4_free_ext_cachep, GFP_NOFS); + if (!new_entry) { + err = -ENOMEM; + goto error_return; + } new_entry->start_blk = bit; new_entry->group = block_group; new_entry->count = count; @@ -4640,12 +4632,9 @@ do_more: * with group lock held. generate_buddy look at * them with group lock_held */ - if (test_opt(sb, DISCARD)) - ext4_issue_discard(sb, block_group, bit, count); ext4_lock_group(sb, block_group); mb_clear_bits(bitmap_bh->b_data, bit, count); mb_free_blocks(inode, &e4b, bit, count); - ext4_mb_return_to_preallocation(inode, &e4b, block, count); } ret = ext4_free_blks_count(sb, gdp) + count; @@ -4720,8 +4709,6 @@ static int ext4_trim_extent(struct super_block *sb, int start, int count, ext4_unlock_group(sb, group); ret = ext4_issue_discard(sb, group, start, count); - if (ret) - ext4_std_error(sb, ret); ext4_lock_group(sb, group); mb_free_blocks(NULL, e4b, start, ex.fe_len); @@ -4821,6 +4808,8 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) ext4_group_t group, ngroups = ext4_get_groups_count(sb); ext4_grpblk_t cnt = 0, first_block, last_block; uint64_t start, len, minlen, trimmed; + ext4_fsblk_t first_data_blk = + le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block); int ret = 0; start = range->start >> sb->s_blocksize_bits; @@ -4830,6 +4819,10 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) if (unlikely(minlen > EXT4_BLOCKS_PER_GROUP(sb))) return -EINVAL; + if (start < first_data_blk) { + len -= first_data_blk - start; + start = first_data_blk; + } /* Determine first and last group to examine based on start and len */ ext4_get_group_no_and_offset(sb, (ext4_fsblk_t) start, @@ -4853,7 +4846,7 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) if (len >= EXT4_BLOCKS_PER_GROUP(sb)) len -= (EXT4_BLOCKS_PER_GROUP(sb) - first_block); else - last_block = len; + last_block = first_block + len; if (e4b.bd_info->bb_free >= minlen) { cnt = ext4_trim_all_free(sb, &e4b, first_block, diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c index 25f3a97..b0a126f 100644 --- a/fs/ext4/migrate.c +++ b/fs/ext4/migrate.c @@ -496,7 +496,7 @@ int ext4_ext_migrate(struct inode *inode) goal = (((inode->i_ino - 1) / EXT4_INODES_PER_GROUP(inode->i_sb)) * EXT4_INODES_PER_GROUP(inode->i_sb)) + 1; tmp_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode, - S_IFREG, 0, goal); + S_IFREG, NULL, goal); if (IS_ERR(tmp_inode)) { retval = -ENOMEM; ext4_journal_stop(handle); diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 92203b8..5485390 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -581,9 +581,9 @@ static int htree_dirblock_to_tree(struct file *dir_file, dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0)); for (; de < top; de = ext4_next_entry(de, dir->i_sb->s_blocksize)) { - if (!ext4_check_dir_entry(dir, de, bh, - (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb)) - +((char *)de - bh->b_data))) { + if (ext4_check_dir_entry(dir, NULL, de, bh, + (block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb)) + + ((char *)de - bh->b_data))) { /* On error, skip the f_pos to the next block. */ dir_file->f_pos = (dir_file->f_pos | (dir->i_sb->s_blocksize - 1)) + 1; @@ -820,7 +820,7 @@ static inline int search_dirblock(struct buffer_head *bh, if ((char *) de + namelen <= dlimit && ext4_match (namelen, name, de)) { /* found a match - just to be sure, do a full check */ - if (!ext4_check_dir_entry(dir, de, bh, offset)) + if (ext4_check_dir_entry(dir, NULL, de, bh, offset)) return -1; *res_dir = de; return 1; @@ -872,7 +872,7 @@ static struct buffer_head * ext4_find_entry (struct inode *dir, if (namelen > EXT4_NAME_LEN) return NULL; if ((namelen <= 2) && (name[0] == '.') && - (name[1] == '.' || name[1] == '0')) { + (name[1] == '.' || name[1] == '\0')) { /* * "." or ".." will only be in the first block * NFS may look up ".."; "." should be handled by the VFS @@ -1036,7 +1036,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, stru return ERR_PTR(-EIO); } inode = ext4_iget(dir->i_sb, ino); - if (unlikely(IS_ERR(inode))) { + if (IS_ERR(inode)) { if (PTR_ERR(inode) == -ESTALE) { EXT4_ERROR_INODE(dir, "deleted inode referenced: %u", @@ -1269,7 +1269,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry, de = (struct ext4_dir_entry_2 *)bh->b_data; top = bh->b_data + blocksize - reclen; while ((char *) de <= top) { - if (!ext4_check_dir_entry(dir, de, bh, offset)) + if (ext4_check_dir_entry(dir, NULL, de, bh, offset)) return -EIO; if (ext4_match(namelen, name, de)) return -EEXIST; @@ -1602,7 +1602,11 @@ static int ext4_dx_add_entry(handle_t *handle, struct dentry *dentry, if (err) goto journal_error; } - ext4_handle_dirty_metadata(handle, inode, frames[0].bh); + err = ext4_handle_dirty_metadata(handle, inode, frames[0].bh); + if (err) { + ext4_std_error(inode->i_sb, err); + goto cleanup; + } } de = do_split(handle, dir, &bh, frame, &hinfo, &err); if (!de) @@ -1630,17 +1634,21 @@ static int ext4_delete_entry(handle_t *handle, { struct ext4_dir_entry_2 *de, *pde; unsigned int blocksize = dir->i_sb->s_blocksize; - int i; + int i, err; i = 0; pde = NULL; de = (struct ext4_dir_entry_2 *) bh->b_data; while (i < bh->b_size) { - if (!ext4_check_dir_entry(dir, de, bh, i)) + if (ext4_check_dir_entry(dir, NULL, de, bh, i)) return -EIO; if (de == de_del) { BUFFER_TRACE(bh, "get_write_access"); - ext4_journal_get_write_access(handle, bh); + err = ext4_journal_get_write_access(handle, bh); + if (unlikely(err)) { + ext4_std_error(dir->i_sb, err); + return err; + } if (pde) pde->rec_len = ext4_rec_len_to_disk( ext4_rec_len_from_disk(pde->rec_len, @@ -1652,7 +1660,11 @@ static int ext4_delete_entry(handle_t *handle, de->inode = 0; dir->i_version++; BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); - ext4_handle_dirty_metadata(handle, dir, bh); + err = ext4_handle_dirty_metadata(handle, dir, bh); + if (unlikely(err)) { + ext4_std_error(dir->i_sb, err); + return err; + } return 0; } i += ext4_rec_len_from_disk(de->rec_len, blocksize); @@ -1789,7 +1801,7 @@ static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode) { handle_t *handle; struct inode *inode; - struct buffer_head *dir_block; + struct buffer_head *dir_block = NULL; struct ext4_dir_entry_2 *de; unsigned int blocksize = dir->i_sb->s_blocksize; int err, retries = 0; @@ -1822,7 +1834,9 @@ retry: if (!dir_block) goto out_clear_inode; BUFFER_TRACE(dir_block, "get_write_access"); - ext4_journal_get_write_access(handle, dir_block); + err = ext4_journal_get_write_access(handle, dir_block); + if (err) + goto out_clear_inode; de = (struct ext4_dir_entry_2 *) dir_block->b_data; de->inode = cpu_to_le32(inode->i_ino); de->name_len = 1; @@ -1839,10 +1853,12 @@ retry: ext4_set_de_type(dir->i_sb, de, S_IFDIR); inode->i_nlink = 2; BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata"); - ext4_handle_dirty_metadata(handle, dir, dir_block); - brelse(dir_block); - ext4_mark_inode_dirty(handle, inode); - err = ext4_add_entry(handle, dentry, inode); + err = ext4_handle_dirty_metadata(handle, dir, dir_block); + if (err) + goto out_clear_inode; + err = ext4_mark_inode_dirty(handle, inode); + if (!err) + err = ext4_add_entry(handle, dentry, inode); if (err) { out_clear_inode: clear_nlink(inode); @@ -1853,10 +1869,13 @@ out_clear_inode: } ext4_inc_count(handle, dir); ext4_update_dx_flag(dir); - ext4_mark_inode_dirty(handle, dir); + err = ext4_mark_inode_dirty(handle, dir); + if (err) + goto out_clear_inode; d_instantiate(dentry, inode); unlock_new_inode(inode); out_stop: + brelse(dir_block); ext4_journal_stop(handle); if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries)) goto retry; @@ -1919,7 +1938,7 @@ static int empty_dir(struct inode *inode) } de = (struct ext4_dir_entry_2 *) bh->b_data; } - if (!ext4_check_dir_entry(inode, de, bh, offset)) { + if (ext4_check_dir_entry(inode, NULL, de, bh, offset)) { de = (struct ext4_dir_entry_2 *)(bh->b_data + sb->s_blocksize); offset = (offset | (sb->s_blocksize - 1)) + 1; @@ -2407,7 +2426,11 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, ext4_current_time(new_dir); ext4_mark_inode_dirty(handle, new_dir); BUFFER_TRACE(new_bh, "call ext4_handle_dirty_metadata"); - ext4_handle_dirty_metadata(handle, new_dir, new_bh); + retval = ext4_handle_dirty_metadata(handle, new_dir, new_bh); + if (unlikely(retval)) { + ext4_std_error(new_dir->i_sb, retval); + goto end_rename; + } brelse(new_bh); new_bh = NULL; } @@ -2459,7 +2482,11 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, PARENT_INO(dir_bh->b_data, new_dir->i_sb->s_blocksize) = cpu_to_le32(new_dir->i_ino); BUFFER_TRACE(dir_bh, "call ext4_handle_dirty_metadata"); - ext4_handle_dirty_metadata(handle, old_dir, dir_bh); + retval = ext4_handle_dirty_metadata(handle, old_dir, dir_bh); + if (retval) { + ext4_std_error(old_dir->i_sb, retval); + goto end_rename; + } ext4_dec_count(handle, old_dir); if (new_inode) { /* checked empty_dir above, can't have another parent, diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 46a7d6a..7270dcf 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -32,16 +32,24 @@ static struct kmem_cache *io_page_cachep, *io_end_cachep; +#define WQ_HASH_SZ 37 +#define to_ioend_wq(v) (&ioend_wq[((unsigned long)v) % WQ_HASH_SZ]) +static wait_queue_head_t ioend_wq[WQ_HASH_SZ]; + int __init ext4_init_pageio(void) { + int i; + io_page_cachep = KMEM_CACHE(ext4_io_page, SLAB_RECLAIM_ACCOUNT); if (io_page_cachep == NULL) return -ENOMEM; io_end_cachep = KMEM_CACHE(ext4_io_end, SLAB_RECLAIM_ACCOUNT); - if (io_page_cachep == NULL) { + if (io_end_cachep == NULL) { kmem_cache_destroy(io_page_cachep); return -ENOMEM; } + for (i = 0; i < WQ_HASH_SZ; i++) + init_waitqueue_head(&ioend_wq[i]); return 0; } @@ -52,24 +60,37 @@ void ext4_exit_pageio(void) kmem_cache_destroy(io_page_cachep); } +void ext4_ioend_wait(struct inode *inode) +{ + wait_queue_head_t *wq = to_ioend_wq(inode); + + wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_ioend_count) == 0)); +} + +static void put_io_page(struct ext4_io_page *io_page) +{ + if (atomic_dec_and_test(&io_page->p_count)) { + end_page_writeback(io_page->p_page); + put_page(io_page->p_page); + kmem_cache_free(io_page_cachep, io_page); + } +} + void ext4_free_io_end(ext4_io_end_t *io) { int i; + wait_queue_head_t *wq; BUG_ON(!io); if (io->page) put_page(io->page); - for (i = 0; i < io->num_io_pages; i++) { - if (--io->pages[i]->p_count == 0) { - struct page *page = io->pages[i]->p_page; - - end_page_writeback(page); - put_page(page); - kmem_cache_free(io_page_cachep, io->pages[i]); - } - } + for (i = 0; i < io->num_io_pages; i++) + put_io_page(io->pages[i]); io->num_io_pages = 0; - iput(io->inode); + wq = to_ioend_wq(io->inode); + if (atomic_dec_and_test(&EXT4_I(io->inode)->i_ioend_count) && + waitqueue_active(wq)) + wake_up_all(wq); kmem_cache_free(io_end_cachep, io); } @@ -137,13 +158,10 @@ static void ext4_end_io_work(struct work_struct *work) ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags) { - ext4_io_end_t *io = NULL; - - io = kmem_cache_alloc(io_end_cachep, flags); + ext4_io_end_t *io = kmem_cache_zalloc(io_end_cachep, flags); if (io) { - memset(io, 0, sizeof(*io)); - io->inode = igrab(inode); - BUG_ON(!io->inode); + atomic_inc(&EXT4_I(inode)->i_ioend_count); + io->inode = inode; INIT_WORK(&io->work, ext4_end_io_work); INIT_LIST_HEAD(&io->list); } @@ -171,35 +189,15 @@ static void ext4_end_bio(struct bio *bio, int error) struct workqueue_struct *wq; struct inode *inode; unsigned long flags; - ext4_fsblk_t err_block; int i; BUG_ON(!io_end); - inode = io_end->inode; bio->bi_private = NULL; bio->bi_end_io = NULL; if (test_bit(BIO_UPTODATE, &bio->bi_flags)) error = 0; - err_block = bio->bi_sector >> (inode->i_blkbits - 9); bio_put(bio); - if (!(inode->i_sb->s_flags & MS_ACTIVE)) { - pr_err("sb umounted, discard end_io request for inode %lu\n", - io_end->inode->i_ino); - ext4_free_io_end(io_end); - return; - } - - if (error) { - io_end->flag |= EXT4_IO_END_ERROR; - ext4_warning(inode->i_sb, "I/O error writing to inode %lu " - "(offset %llu size %ld starting block %llu)", - inode->i_ino, - (unsigned long long) io_end->offset, - (long) io_end->size, - (unsigned long long) err_block); - } - for (i = 0; i < io_end->num_io_pages; i++) { struct page *page = io_end->pages[i]->p_page; struct buffer_head *bh, *head; @@ -236,14 +234,6 @@ static void ext4_end_bio(struct bio *bio, int error) } while (bh != head); } - if (--io_end->pages[i]->p_count == 0) { - struct page *page = io_end->pages[i]->p_page; - - end_page_writeback(page); - put_page(page); - kmem_cache_free(io_page_cachep, io_end->pages[i]); - } - /* * If this is a partial write which happened to make * all buffers uptodate then we can optimize away a @@ -253,9 +243,22 @@ static void ext4_end_bio(struct bio *bio, int error) */ if (!partial_write) SetPageUptodate(page); - } + put_io_page(io_end->pages[i]); + } io_end->num_io_pages = 0; + inode = io_end->inode; + + if (error) { + io_end->flag |= EXT4_IO_END_ERROR; + ext4_warning(inode->i_sb, "I/O error writing to inode %lu " + "(offset %llu size %ld starting block %llu)", + inode->i_ino, + (unsigned long long) io_end->offset, + (long) io_end->size, + (unsigned long long) + bio->bi_sector >> (inode->i_blkbits - 9)); + } /* Add the io_end to per-inode completed io list*/ spin_lock_irqsave(&EXT4_I(inode)->i_completed_io_lock, flags); @@ -305,7 +308,6 @@ static int io_submit_init(struct ext4_io_submit *io, bio->bi_private = io->io_end = io_end; bio->bi_end_io = ext4_end_bio; - io_end->inode = inode; io_end->offset = (page->index << PAGE_CACHE_SHIFT) + bh_offset(bh); io->io_bio = bio; @@ -360,7 +362,7 @@ submit_and_retry: if ((io_end->num_io_pages == 0) || (io_end->pages[io_end->num_io_pages-1] != io_page)) { io_end->pages[io_end->num_io_pages++] = io_page; - io_page->p_count++; + atomic_inc(&io_page->p_count); } return 0; } @@ -389,7 +391,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io, return -ENOMEM; } io_page->p_page = page; - io_page->p_count = 0; + atomic_set(&io_page->p_count, 1); get_page(page); for (bh = head = page_buffers(page), block_start = 0; @@ -421,10 +423,6 @@ int ext4_bio_write_page(struct ext4_io_submit *io, * PageWriteback bit from the page to prevent the system from * wedging later on. */ - if (io_page->p_count == 0) { - put_page(page); - end_page_writeback(page); - kmem_cache_free(io_page_cachep, io_page); - } + put_io_page(io_page); return ret; } diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index dc96392..3ecc6e4 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -220,7 +220,11 @@ static int setup_new_group_blocks(struct super_block *sb, memcpy(gdb->b_data, sbi->s_group_desc[i]->b_data, gdb->b_size); set_buffer_uptodate(gdb); unlock_buffer(gdb); - ext4_handle_dirty_metadata(handle, NULL, gdb); + err = ext4_handle_dirty_metadata(handle, NULL, gdb); + if (unlikely(err)) { + brelse(gdb); + goto exit_bh; + } ext4_set_bit(bit, bh->b_data); brelse(gdb); } @@ -232,6 +236,8 @@ static int setup_new_group_blocks(struct super_block *sb, GFP_NOFS); if (err) goto exit_bh; + for (i = 0, bit = gdblocks + 1; i < reserved_gdb; i++, bit++) + ext4_set_bit(bit, bh->b_data); ext4_debug("mark block bitmap %#04llx (+%llu)\n", input->block_bitmap, input->block_bitmap - start); @@ -247,13 +253,20 @@ static int setup_new_group_blocks(struct super_block *sb, err = sb_issue_zeroout(sb, block, sbi->s_itb_per_group, GFP_NOFS); if (err) goto exit_bh; + for (i = 0, bit = input->inode_table - start; + i < sbi->s_itb_per_group; i++, bit++) + ext4_set_bit(bit, bh->b_data); if ((err = extend_or_restart_transaction(handle, 2, bh))) goto exit_bh; ext4_mark_bitmap_end(input->blocks_count, sb->s_blocksize * 8, bh->b_data); - ext4_handle_dirty_metadata(handle, NULL, bh); + err = ext4_handle_dirty_metadata(handle, NULL, bh); + if (unlikely(err)) { + ext4_std_error(sb, err); + goto exit_bh; + } brelse(bh); /* Mark unused entries in inode bitmap used */ ext4_debug("clear inode bitmap %#04llx (+%llu)\n", @@ -265,7 +278,9 @@ static int setup_new_group_blocks(struct super_block *sb, ext4_mark_bitmap_end(EXT4_INODES_PER_GROUP(sb), sb->s_blocksize * 8, bh->b_data); - ext4_handle_dirty_metadata(handle, NULL, bh); + err = ext4_handle_dirty_metadata(handle, NULL, bh); + if (unlikely(err)) + ext4_std_error(sb, err); exit_bh: brelse(bh); @@ -417,17 +432,21 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, goto exit_dind; } - if ((err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh))) + err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh); + if (unlikely(err)) goto exit_dind; - if ((err = ext4_journal_get_write_access(handle, *primary))) + err = ext4_journal_get_write_access(handle, *primary); + if (unlikely(err)) goto exit_sbh; - if ((err = ext4_journal_get_write_access(handle, dind))) - goto exit_primary; + err = ext4_journal_get_write_access(handle, dind); + if (unlikely(err)) + ext4_std_error(sb, err); /* ext4_reserve_inode_write() gets a reference on the iloc */ - if ((err = ext4_reserve_inode_write(handle, inode, &iloc))) + err = ext4_reserve_inode_write(handle, inode, &iloc); + if (unlikely(err)) goto exit_dindj; n_group_desc = kmalloc((gdb_num + 1) * sizeof(struct buffer_head *), @@ -449,12 +468,20 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, * reserved inode, and will become GDT blocks (primary and backup). */ data[gdb_num % EXT4_ADDR_PER_BLOCK(sb)] = 0; - ext4_handle_dirty_metadata(handle, NULL, dind); - brelse(dind); + err = ext4_handle_dirty_metadata(handle, NULL, dind); + if (unlikely(err)) { + ext4_std_error(sb, err); + goto exit_inode; + } inode->i_blocks -= (gdbackups + 1) * sb->s_blocksize >> 9; ext4_mark_iloc_dirty(handle, inode, &iloc); memset((*primary)->b_data, 0, sb->s_blocksize); - ext4_handle_dirty_metadata(handle, NULL, *primary); + err = ext4_handle_dirty_metadata(handle, NULL, *primary); + if (unlikely(err)) { + ext4_std_error(sb, err); + goto exit_inode; + } + brelse(dind); o_group_desc = EXT4_SB(sb)->s_group_desc; memcpy(n_group_desc, o_group_desc, @@ -465,19 +492,19 @@ static int add_new_gdb(handle_t *handle, struct inode *inode, kfree(o_group_desc); le16_add_cpu(&es->s_reserved_gdt_blocks, -1); - ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh); + err = ext4_handle_dirty_metadata(handle, NULL, EXT4_SB(sb)->s_sbh); + if (err) + ext4_std_error(sb, err); - return 0; + return err; exit_inode: /* ext4_journal_release_buffer(handle, iloc.bh); */ brelse(iloc.bh); exit_dindj: /* ext4_journal_release_buffer(handle, dind); */ -exit_primary: - /* ext4_journal_release_buffer(handle, *primary); */ exit_sbh: - /* ext4_journal_release_buffer(handle, *primary); */ + /* ext4_journal_release_buffer(handle, EXT4_SB(sb)->s_sbh); */ exit_dind: brelse(dind); exit_bh: @@ -660,7 +687,9 @@ static void update_backups(struct super_block *sb, memset(bh->b_data + size, 0, rest); set_buffer_uptodate(bh); unlock_buffer(bh); - ext4_handle_dirty_metadata(handle, NULL, bh); + err = ext4_handle_dirty_metadata(handle, NULL, bh); + if (unlikely(err)) + ext4_std_error(sb, err); brelse(bh); } if ((err2 = ext4_journal_stop(handle)) && !err) @@ -878,7 +907,11 @@ int ext4_group_add(struct super_block *sb, struct ext4_new_group_data *input) /* Update the global fs size fields */ sbi->s_groups_count++; - ext4_handle_dirty_metadata(handle, NULL, primary); + err = ext4_handle_dirty_metadata(handle, NULL, primary); + if (unlikely(err)) { + ext4_std_error(sb, err); + goto exit_journal; + } /* Update the reserved block counts only once the new group is * active. */ diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 0348ce0..29c80f6 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -73,8 +73,8 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); static int ext4_unfreeze(struct super_block *sb); static void ext4_write_super(struct super_block *sb); static int ext4_freeze(struct super_block *sb); -static int ext4_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt); +static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data); static void ext4_destroy_lazyinit_thread(void); static void ext4_unregister_li_request(struct super_block *sb); @@ -82,7 +82,7 @@ static void ext4_unregister_li_request(struct super_block *sb); static struct file_system_type ext3_fs_type = { .owner = THIS_MODULE, .name = "ext3", - .get_sb = ext4_get_sb, + .mount = ext4_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -388,13 +388,14 @@ static void ext4_handle_error(struct super_block *sb) void __ext4_error(struct super_block *sb, const char *function, unsigned int line, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", - sb->s_id, function, line, current->comm); - vprintk(fmt, args); - printk("\n"); + vaf.fmt = fmt; + vaf.va = &args; + printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", + sb->s_id, function, line, current->comm, &vaf); va_end(args); ext4_handle_error(sb); @@ -405,28 +406,31 @@ void ext4_error_inode(struct inode *inode, const char *function, const char *fmt, ...) { va_list args; + struct va_format vaf; struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; es->s_last_error_ino = cpu_to_le32(inode->i_ino); es->s_last_error_block = cpu_to_le64(block); save_error_info(inode->i_sb, function, line); va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", inode->i_sb->s_id, function, line, inode->i_ino); if (block) - printk("block %llu: ", block); - printk("comm %s: ", current->comm); - vprintk(fmt, args); - printk("\n"); + printk(KERN_CONT "block %llu: ", block); + printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); va_end(args); ext4_handle_error(inode->i_sb); } void ext4_error_file(struct file *file, const char *function, - unsigned int line, const char *fmt, ...) + unsigned int line, ext4_fsblk_t block, + const char *fmt, ...) { va_list args; + struct va_format vaf; struct ext4_super_block *es; struct inode *inode = file->f_dentry->d_inode; char pathname[80], *path; @@ -434,17 +438,18 @@ void ext4_error_file(struct file *file, const char *function, es = EXT4_SB(inode->i_sb)->s_es; es->s_last_error_ino = cpu_to_le32(inode->i_ino); save_error_info(inode->i_sb, function, line); - va_start(args, fmt); path = d_path(&(file->f_path), pathname, sizeof(pathname)); - if (!path) + if (IS_ERR(path)) path = "(unknown)"; printk(KERN_CRIT - "EXT4-fs error (device %s): %s:%d: inode #%lu " - "(comm %s path %s): ", - inode->i_sb->s_id, function, line, inode->i_ino, - current->comm, path); - vprintk(fmt, args); - printk("\n"); + "EXT4-fs error (device %s): %s:%d: inode #%lu: ", + inode->i_sb->s_id, function, line, inode->i_ino); + if (block) + printk(KERN_CONT "block %llu: ", block); + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); va_end(args); ext4_handle_error(inode->i_sb); @@ -543,28 +548,29 @@ void __ext4_abort(struct super_block *sb, const char *function, panic("EXT4-fs panic from previous error\n"); } -void ext4_msg (struct super_block * sb, const char *prefix, - const char *fmt, ...) +void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk("%sEXT4-fs (%s): ", prefix, sb->s_id); - vprintk(fmt, args); - printk("\n"); + vaf.fmt = fmt; + vaf.va = &args; + printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); va_end(args); } void __ext4_warning(struct super_block *sb, const char *function, unsigned int line, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", - sb->s_id, function, line); - vprintk(fmt, args); - printk("\n"); + vaf.fmt = fmt; + vaf.va = &args; + printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", + sb->s_id, function, line, &vaf); va_end(args); } @@ -575,21 +581,25 @@ void __ext4_grp_locked_error(const char *function, unsigned int line, __releases(bitlock) __acquires(bitlock) { + struct va_format vaf; va_list args; struct ext4_super_block *es = EXT4_SB(sb)->s_es; es->s_last_error_ino = cpu_to_le32(ino); es->s_last_error_block = cpu_to_le64(block); __save_error_info(sb, function, line); + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", sb->s_id, function, line, grp); if (ino) - printk("inode %lu: ", ino); + printk(KERN_CONT "inode %lu: ", ino); if (block) - printk("block %llu:", (unsigned long long) block); - vprintk(fmt, args); - printk("\n"); + printk(KERN_CONT "block %llu:", (unsigned long long) block); + printk(KERN_CONT "%pV\n", &vaf); va_end(args); if (test_opt(sb, ERRORS_CONT)) { @@ -808,32 +818,43 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); INIT_LIST_HEAD(&ei->i_prealloc_list); spin_lock_init(&ei->i_prealloc_lock); - /* - * Note: We can be called before EXT4_SB(sb)->s_journal is set, - * therefore it can be null here. Don't check it, just initialize - * jinode. - */ - jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); ei->i_reserved_data_blocks = 0; ei->i_reserved_meta_blocks = 0; ei->i_allocated_meta_blocks = 0; ei->i_da_metadata_calc_len = 0; - ei->i_delalloc_reserved_flag = 0; spin_lock_init(&(ei->i_block_reservation_lock)); #ifdef CONFIG_QUOTA ei->i_reserved_quota = 0; #endif + ei->jinode = NULL; INIT_LIST_HEAD(&ei->i_completed_io_list); spin_lock_init(&ei->i_completed_io_lock); ei->cur_aio_dio = NULL; ei->i_sync_tid = 0; ei->i_datasync_tid = 0; + atomic_set(&ei->i_ioend_count, 0); return &ei->vfs_inode; } +static int ext4_drop_inode(struct inode *inode) +{ + int drop = generic_drop_inode(inode); + + trace_ext4_drop_inode(inode, drop); + return drop; +} + +static void ext4_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); +} + static void ext4_destroy_inode(struct inode *inode) { + ext4_ioend_wait(inode); if (!list_empty(&(EXT4_I(inode)->i_orphan))) { ext4_msg(inode->i_sb, KERN_ERR, "Inode %lu (%p): orphan list check failed!", @@ -843,7 +864,7 @@ static void ext4_destroy_inode(struct inode *inode) true); dump_stack(); } - kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); + call_rcu(&inode->i_rcu, ext4_i_callback); } static void init_once(void *foo) @@ -881,9 +902,12 @@ void ext4_clear_inode(struct inode *inode) end_writeback(inode); dquot_drop(inode); ext4_discard_preallocations(inode); - if (EXT4_JOURNAL(inode)) - jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, - &EXT4_I(inode)->jinode); + if (EXT4_I(inode)->jinode) { + jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), + EXT4_I(inode)->jinode); + jbd2_free_inode(EXT4_I(inode)->jinode); + EXT4_I(inode)->jinode = NULL; + } } static inline void ext4_show_quota_options(struct seq_file *seq, @@ -1016,6 +1040,8 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) !(def_mount_opts & EXT4_DEFM_NODELALLOC)) seq_puts(seq, ",nodelalloc"); + if (test_opt(sb, MBLK_IO_SUBMIT)) + seq_puts(seq, ",mblk_io_submit"); if (sbi->s_stripe) seq_printf(seq, ",stripe=%lu", sbi->s_stripe); /* @@ -1173,6 +1199,7 @@ static const struct super_operations ext4_sops = { .destroy_inode = ext4_destroy_inode, .write_inode = ext4_write_inode, .dirty_inode = ext4_dirty_inode, + .drop_inode = ext4_drop_inode, .evict_inode = ext4_evict_inode, .put_super = ext4_put_super, .sync_fs = ext4_sync_fs, @@ -1186,7 +1213,6 @@ static const struct super_operations ext4_sops = { .quota_write = ext4_quota_write, #endif .bdev_try_to_free_page = bdev_try_to_free_page, - .trim_fs = ext4_trim_fs }; static const struct super_operations ext4_nojournal_sops = { @@ -1194,6 +1220,7 @@ static const struct super_operations ext4_nojournal_sops = { .destroy_inode = ext4_destroy_inode, .write_inode = ext4_write_inode, .dirty_inode = ext4_dirty_inode, + .drop_inode = ext4_drop_inode, .evict_inode = ext4_evict_inode, .write_super = ext4_write_super, .put_super = ext4_put_super, @@ -1228,8 +1255,8 @@ enum { Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, - Opt_stripe, Opt_delalloc, Opt_nodelalloc, - Opt_block_validity, Opt_noblock_validity, + Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, + Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, Opt_inode_readahead_blks, Opt_journal_ioprio, Opt_dioread_nolock, Opt_dioread_lock, Opt_discard, Opt_nodiscard, @@ -1293,6 +1320,8 @@ static const match_table_t tokens = { {Opt_resize, "resize"}, {Opt_delalloc, "delalloc"}, {Opt_nodelalloc, "nodelalloc"}, + {Opt_mblk_io_submit, "mblk_io_submit"}, + {Opt_nomblk_io_submit, "nomblk_io_submit"}, {Opt_block_validity, "block_validity"}, {Opt_noblock_validity, "noblock_validity"}, {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, @@ -1371,7 +1400,7 @@ static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) sbi->s_qf_names[qtype] = NULL; return 0; } - set_opt(sbi->s_mount_opt, QUOTA); + set_opt(sb, QUOTA); return 1; } @@ -1426,21 +1455,21 @@ static int parse_options(char *options, struct super_block *sb, switch (token) { case Opt_bsd_df: ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); - clear_opt(sbi->s_mount_opt, MINIX_DF); + clear_opt(sb, MINIX_DF); break; case Opt_minix_df: ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); - set_opt(sbi->s_mount_opt, MINIX_DF); + set_opt(sb, MINIX_DF); break; case Opt_grpid: ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); - set_opt(sbi->s_mount_opt, GRPID); + set_opt(sb, GRPID); break; case Opt_nogrpid: ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); - clear_opt(sbi->s_mount_opt, GRPID); + clear_opt(sb, GRPID); break; case Opt_resuid: @@ -1458,38 +1487,38 @@ static int parse_options(char *options, struct super_block *sb, /* *sb_block = match_int(&args[0]); */ break; case Opt_err_panic: - clear_opt(sbi->s_mount_opt, ERRORS_CONT); - clear_opt(sbi->s_mount_opt, ERRORS_RO); - set_opt(sbi->s_mount_opt, ERRORS_PANIC); + clear_opt(sb, ERRORS_CONT); + clear_opt(sb, ERRORS_RO); + set_opt(sb, ERRORS_PANIC); break; case Opt_err_ro: - clear_opt(sbi->s_mount_opt, ERRORS_CONT); - clear_opt(sbi->s_mount_opt, ERRORS_PANIC); - set_opt(sbi->s_mount_opt, ERRORS_RO); + clear_opt(sb, ERRORS_CONT); + clear_opt(sb, ERRORS_PANIC); + set_opt(sb, ERRORS_RO); break; case Opt_err_cont: - clear_opt(sbi->s_mount_opt, ERRORS_RO); - clear_opt(sbi->s_mount_opt, ERRORS_PANIC); - set_opt(sbi->s_mount_opt, ERRORS_CONT); + clear_opt(sb, ERRORS_RO); + clear_opt(sb, ERRORS_PANIC); + set_opt(sb, ERRORS_CONT); break; case Opt_nouid32: - set_opt(sbi->s_mount_opt, NO_UID32); + set_opt(sb, NO_UID32); break; case Opt_debug: - set_opt(sbi->s_mount_opt, DEBUG); + set_opt(sb, DEBUG); break; case Opt_oldalloc: - set_opt(sbi->s_mount_opt, OLDALLOC); + set_opt(sb, OLDALLOC); break; case Opt_orlov: - clear_opt(sbi->s_mount_opt, OLDALLOC); + clear_opt(sb, OLDALLOC); break; #ifdef CONFIG_EXT4_FS_XATTR case Opt_user_xattr: - set_opt(sbi->s_mount_opt, XATTR_USER); + set_opt(sb, XATTR_USER); break; case Opt_nouser_xattr: - clear_opt(sbi->s_mount_opt, XATTR_USER); + clear_opt(sb, XATTR_USER); break; #else case Opt_user_xattr: @@ -1499,10 +1528,10 @@ static int parse_options(char *options, struct super_block *sb, #endif #ifdef CONFIG_EXT4_FS_POSIX_ACL case Opt_acl: - set_opt(sbi->s_mount_opt, POSIX_ACL); + set_opt(sb, POSIX_ACL); break; case Opt_noacl: - clear_opt(sbi->s_mount_opt, POSIX_ACL); + clear_opt(sb, POSIX_ACL); break; #else case Opt_acl: @@ -1521,7 +1550,7 @@ static int parse_options(char *options, struct super_block *sb, "Cannot specify journal on remount"); return 0; } - set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); + set_opt(sb, UPDATE_JOURNAL); break; case Opt_journal_dev: if (is_remount) { @@ -1534,14 +1563,14 @@ static int parse_options(char *options, struct super_block *sb, *journal_devnum = option; break; case Opt_journal_checksum: - set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); + set_opt(sb, JOURNAL_CHECKSUM); break; case Opt_journal_async_commit: - set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); - set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); + set_opt(sb, JOURNAL_ASYNC_COMMIT); + set_opt(sb, JOURNAL_CHECKSUM); break; case Opt_noload: - set_opt(sbi->s_mount_opt, NOLOAD); + set_opt(sb, NOLOAD); break; case Opt_commit: if (match_int(&args[0], &option)) @@ -1584,15 +1613,15 @@ static int parse_options(char *options, struct super_block *sb, return 0; } } else { - clear_opt(sbi->s_mount_opt, DATA_FLAGS); + clear_opt(sb, DATA_FLAGS); sbi->s_mount_opt |= data_opt; } break; case Opt_data_err_abort: - set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); + set_opt(sb, DATA_ERR_ABORT); break; case Opt_data_err_ignore: - clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); + clear_opt(sb, DATA_ERR_ABORT); break; #ifdef CONFIG_QUOTA case Opt_usrjquota: @@ -1632,12 +1661,12 @@ set_qf_format: break; case Opt_quota: case Opt_usrquota: - set_opt(sbi->s_mount_opt, QUOTA); - set_opt(sbi->s_mount_opt, USRQUOTA); + set_opt(sb, QUOTA); + set_opt(sb, USRQUOTA); break; case Opt_grpquota: - set_opt(sbi->s_mount_opt, QUOTA); - set_opt(sbi->s_mount_opt, GRPQUOTA); + set_opt(sb, QUOTA); + set_opt(sb, GRPQUOTA); break; case Opt_noquota: if (sb_any_quota_loaded(sb)) { @@ -1645,9 +1674,9 @@ set_qf_format: "options when quota turned on"); return 0; } - clear_opt(sbi->s_mount_opt, QUOTA); - clear_opt(sbi->s_mount_opt, USRQUOTA); - clear_opt(sbi->s_mount_opt, GRPQUOTA); + clear_opt(sb, QUOTA); + clear_opt(sb, USRQUOTA); + clear_opt(sb, GRPQUOTA); break; #else case Opt_quota: @@ -1673,7 +1702,7 @@ set_qf_format: sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; break; case Opt_nobarrier: - clear_opt(sbi->s_mount_opt, BARRIER); + clear_opt(sb, BARRIER); break; case Opt_barrier: if (args[0].from) { @@ -1682,9 +1711,9 @@ set_qf_format: } else option = 1; /* No argument, default to 1 */ if (option) - set_opt(sbi->s_mount_opt, BARRIER); + set_opt(sb, BARRIER); else - clear_opt(sbi->s_mount_opt, BARRIER); + clear_opt(sb, BARRIER); break; case Opt_ignore: break; @@ -1708,11 +1737,17 @@ set_qf_format: "Ignoring deprecated bh option"); break; case Opt_i_version: - set_opt(sbi->s_mount_opt, I_VERSION); + set_opt(sb, I_VERSION); sb->s_flags |= MS_I_VERSION; break; case Opt_nodelalloc: - clear_opt(sbi->s_mount_opt, DELALLOC); + clear_opt(sb, DELALLOC); + break; + case Opt_mblk_io_submit: + set_opt(sb, MBLK_IO_SUBMIT); + break; + case Opt_nomblk_io_submit: + clear_opt(sb, MBLK_IO_SUBMIT); break; case Opt_stripe: if (match_int(&args[0], &option)) @@ -1722,13 +1757,13 @@ set_qf_format: sbi->s_stripe = option; break; case Opt_delalloc: - set_opt(sbi->s_mount_opt, DELALLOC); + set_opt(sb, DELALLOC); break; case Opt_block_validity: - set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + set_opt(sb, BLOCK_VALIDITY); break; case Opt_noblock_validity: - clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + clear_opt(sb, BLOCK_VALIDITY); break; case Opt_inode_readahead_blks: if (match_int(&args[0], &option)) @@ -1752,7 +1787,7 @@ set_qf_format: option); break; case Opt_noauto_da_alloc: - set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); + set_opt(sb, NO_AUTO_DA_ALLOC); break; case Opt_auto_da_alloc: if (args[0].from) { @@ -1761,24 +1796,24 @@ set_qf_format: } else option = 1; /* No argument, default to 1 */ if (option) - clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); + clear_opt(sb, NO_AUTO_DA_ALLOC); else - set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); + set_opt(sb,NO_AUTO_DA_ALLOC); break; case Opt_discard: - set_opt(sbi->s_mount_opt, DISCARD); + set_opt(sb, DISCARD); break; case Opt_nodiscard: - clear_opt(sbi->s_mount_opt, DISCARD); + clear_opt(sb, DISCARD); break; case Opt_dioread_nolock: - set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); + set_opt(sb, DIOREAD_NOLOCK); break; case Opt_dioread_lock: - clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); + clear_opt(sb, DIOREAD_NOLOCK); break; case Opt_init_inode_table: - set_opt(sbi->s_mount_opt, INIT_INODE_TABLE); + set_opt(sb, INIT_INODE_TABLE); if (args[0].from) { if (match_int(&args[0], &option)) return 0; @@ -1789,7 +1824,7 @@ set_qf_format: sbi->s_li_wait_mult = option; break; case Opt_noinit_inode_table: - clear_opt(sbi->s_mount_opt, INIT_INODE_TABLE); + clear_opt(sb, INIT_INODE_TABLE); break; default: ext4_msg(sb, KERN_ERR, @@ -1801,10 +1836,10 @@ set_qf_format: #ifdef CONFIG_QUOTA if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) - clear_opt(sbi->s_mount_opt, USRQUOTA); + clear_opt(sb, USRQUOTA); if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) - clear_opt(sbi->s_mount_opt, GRPQUOTA); + clear_opt(sb, GRPQUOTA); if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { ext4_msg(sb, KERN_ERR, "old and new quota " @@ -1874,12 +1909,12 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, ext4_commit_super(sb, 1); if (test_opt(sb, DEBUG)) printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " - "bpg=%lu, ipg=%lu, mo=%04x]\n", + "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", sb->s_blocksize, sbi->s_groups_count, EXT4_BLOCKS_PER_GROUP(sb), EXT4_INODES_PER_GROUP(sb), - sbi->s_mount_opt); + sbi->s_mount_opt, sbi->s_mount_opt2); return res; } @@ -1909,14 +1944,13 @@ static int ext4_fill_flex_info(struct super_block *sb) size = flex_group_count * sizeof(struct flex_groups); sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); if (sbi->s_flex_groups == NULL) { - sbi->s_flex_groups = vmalloc(size); - if (sbi->s_flex_groups) - memset(sbi->s_flex_groups, 0, size); - } - if (sbi->s_flex_groups == NULL) { - ext4_msg(sb, KERN_ERR, "not enough memory for " - "%u flex groups", flex_group_count); - goto failed; + sbi->s_flex_groups = vzalloc(size); + if (sbi->s_flex_groups == NULL) { + ext4_msg(sb, KERN_ERR, + "not enough memory for %u flex groups", + flex_group_count); + goto failed; + } } for (i = 0; i < sbi->s_groups_count; i++) { @@ -2699,7 +2733,6 @@ static int ext4_lazyinit_thread(void *arg) struct ext4_li_request *elr; unsigned long next_wakeup; DEFINE_WAIT(wait); - int ret; BUG_ON(NULL == eli); @@ -2723,13 +2756,12 @@ cont_thread: elr = list_entry(pos, struct ext4_li_request, lr_request); - if (time_after_eq(jiffies, elr->lr_next_sched)) - ret = ext4_run_li_request(elr); - - if (ret) { - ret = 0; - ext4_remove_li_request(elr); - continue; + if (time_after_eq(jiffies, elr->lr_next_sched)) { + if (ext4_run_li_request(elr) != 0) { + /* error, remove the lazy_init job */ + ext4_remove_li_request(elr); + continue; + } } if (time_before(elr->lr_next_sched, next_wakeup)) @@ -2740,7 +2772,8 @@ cont_thread: if (freezing(current)) refrigerator(); - if (time_after_eq(jiffies, next_wakeup)) { + if ((time_after_eq(jiffies, next_wakeup)) || + (MAX_JIFFY_OFFSET == next_wakeup)) { cond_resched(); continue; } @@ -2788,9 +2821,6 @@ static void ext4_clear_request_list(void) struct ext4_li_request *elr; mutex_lock(&ext4_li_info->li_list_mtx); - if (list_empty(&ext4_li_info->li_request_list)) - return; - list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { elr = list_entry(pos, struct ext4_li_request, lr_request); @@ -2899,7 +2929,7 @@ static int ext4_register_li_request(struct super_block *sb, struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_li_request *elr; ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; - int ret; + int ret = 0; if (sbi->s_li_request != NULL) return 0; @@ -3054,41 +3084,41 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) /* Set defaults before we parse the mount options */ def_mount_opts = le32_to_cpu(es->s_default_mount_opts); - set_opt(sbi->s_mount_opt, INIT_INODE_TABLE); + set_opt(sb, INIT_INODE_TABLE); if (def_mount_opts & EXT4_DEFM_DEBUG) - set_opt(sbi->s_mount_opt, DEBUG); + set_opt(sb, DEBUG); if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", "2.6.38"); - set_opt(sbi->s_mount_opt, GRPID); + set_opt(sb, GRPID); } if (def_mount_opts & EXT4_DEFM_UID16) - set_opt(sbi->s_mount_opt, NO_UID32); + set_opt(sb, NO_UID32); #ifdef CONFIG_EXT4_FS_XATTR if (def_mount_opts & EXT4_DEFM_XATTR_USER) - set_opt(sbi->s_mount_opt, XATTR_USER); + set_opt(sb, XATTR_USER); #endif #ifdef CONFIG_EXT4_FS_POSIX_ACL if (def_mount_opts & EXT4_DEFM_ACL) - set_opt(sbi->s_mount_opt, POSIX_ACL); + set_opt(sb, POSIX_ACL); #endif if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) - set_opt(sbi->s_mount_opt, JOURNAL_DATA); + set_opt(sb, JOURNAL_DATA); else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) - set_opt(sbi->s_mount_opt, ORDERED_DATA); + set_opt(sb, ORDERED_DATA); else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) - set_opt(sbi->s_mount_opt, WRITEBACK_DATA); + set_opt(sb, WRITEBACK_DATA); if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) - set_opt(sbi->s_mount_opt, ERRORS_PANIC); + set_opt(sb, ERRORS_PANIC); else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) - set_opt(sbi->s_mount_opt, ERRORS_CONT); + set_opt(sb, ERRORS_CONT); else - set_opt(sbi->s_mount_opt, ERRORS_RO); + set_opt(sb, ERRORS_RO); if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) - set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + set_opt(sb, BLOCK_VALIDITY); if (def_mount_opts & EXT4_DEFM_DISCARD) - set_opt(sbi->s_mount_opt, DISCARD); + set_opt(sb, DISCARD); sbi->s_resuid = le16_to_cpu(es->s_def_resuid); sbi->s_resgid = le16_to_cpu(es->s_def_resgid); @@ -3097,7 +3127,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) - set_opt(sbi->s_mount_opt, BARRIER); + set_opt(sb, BARRIER); /* * enable delayed allocation by default @@ -3105,7 +3135,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ if (!IS_EXT3_SB(sb) && ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) - set_opt(sbi->s_mount_opt, DELALLOC); + set_opt(sb, DELALLOC); if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, &journal_devnum, &journal_ioprio, NULL, 0)) { @@ -3257,13 +3287,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) * Test whether we have more sectors than will fit in sector_t, * and whether the max offset is addressable by the page cache. */ - ret = generic_check_addressable(sb->s_blocksize_bits, + err = generic_check_addressable(sb->s_blocksize_bits, ext4_blocks_count(es)); - if (ret) { + if (err) { ext4_msg(sb, KERN_ERR, "filesystem" " too large to mount safely on this system"); if (sizeof(sector_t) < 8) ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); + ret = err; goto failed_mount; } @@ -3348,6 +3379,24 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) get_random_bytes(&sbi->s_next_generation, sizeof(u32)); spin_lock_init(&sbi->s_next_gen_lock); + err = percpu_counter_init(&sbi->s_freeblocks_counter, + ext4_count_free_blocks(sb)); + if (!err) { + err = percpu_counter_init(&sbi->s_freeinodes_counter, + ext4_count_free_inodes(sb)); + } + if (!err) { + err = percpu_counter_init(&sbi->s_dirs_counter, + ext4_count_dirs(sb)); + } + if (!err) { + err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); + } + if (err) { + ext4_msg(sb, KERN_ERR, "insufficient memory"); + goto failed_mount3; + } + sbi->s_stripe = ext4_get_stripe_size(sbi); sbi->s_max_writeback_mb_bump = 128; @@ -3389,8 +3438,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) "suppressed and not mounted read-only"); goto failed_mount_wq; } else { - clear_opt(sbi->s_mount_opt, DATA_FLAGS); - set_opt(sbi->s_mount_opt, WRITEBACK_DATA); + clear_opt(sb, DATA_FLAGS); + set_opt(sb, WRITEBACK_DATA); sbi->s_journal = NULL; needs_recovery = 0; goto no_journal; @@ -3428,9 +3477,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) */ if (jbd2_journal_check_available_features (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) - set_opt(sbi->s_mount_opt, ORDERED_DATA); + set_opt(sb, ORDERED_DATA); else - set_opt(sbi->s_mount_opt, JOURNAL_DATA); + set_opt(sb, JOURNAL_DATA); break; case EXT4_MOUNT_ORDERED_DATA: @@ -3446,22 +3495,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); -no_journal: - err = percpu_counter_init(&sbi->s_freeblocks_counter, - ext4_count_free_blocks(sb)); - if (!err) - err = percpu_counter_init(&sbi->s_freeinodes_counter, - ext4_count_free_inodes(sb)); - if (!err) - err = percpu_counter_init(&sbi->s_dirs_counter, - ext4_count_dirs(sb)); - if (!err) - err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); - if (err) { - ext4_msg(sb, KERN_ERR, "insufficient memory"); - goto failed_mount_wq; - } + /* + * The journal may have updated the bg summary counts, so we + * need to update the global counters. + */ + percpu_counter_set(&sbi->s_freeblocks_counter, + ext4_count_free_blocks(sb)); + percpu_counter_set(&sbi->s_freeinodes_counter, + ext4_count_free_inodes(sb)); + percpu_counter_set(&sbi->s_dirs_counter, + ext4_count_dirs(sb)); + percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); +no_journal: EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); if (!EXT4_SB(sb)->dio_unwritten_wq) { printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); @@ -3523,18 +3569,18 @@ no_journal: (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " "requested data journaling mode"); - clear_opt(sbi->s_mount_opt, DELALLOC); + clear_opt(sb, DELALLOC); } if (test_opt(sb, DIOREAD_NOLOCK)) { if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " "option - requested data journaling mode"); - clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); + clear_opt(sb, DIOREAD_NOLOCK); } if (sb->s_blocksize < PAGE_SIZE) { ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " "option - block size is too small"); - clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); + clear_opt(sb, DIOREAD_NOLOCK); } } @@ -3611,10 +3657,6 @@ failed_mount_wq: jbd2_journal_destroy(sbi->s_journal); sbi->s_journal = NULL; } - percpu_counter_destroy(&sbi->s_freeblocks_counter); - percpu_counter_destroy(&sbi->s_freeinodes_counter); - percpu_counter_destroy(&sbi->s_dirs_counter); - percpu_counter_destroy(&sbi->s_dirtyblocks_counter); failed_mount3: if (sbi->s_flex_groups) { if (is_vmalloc_addr(sbi->s_flex_groups)) @@ -3622,6 +3664,10 @@ failed_mount3: else kfree(sbi->s_flex_groups); } + percpu_counter_destroy(&sbi->s_freeblocks_counter); + percpu_counter_destroy(&sbi->s_freeinodes_counter); + percpu_counter_destroy(&sbi->s_dirs_counter); + percpu_counter_destroy(&sbi->s_dirtyblocks_counter); failed_mount2: for (i = 0; i < db_count; i++) brelse(sbi->s_group_desc[i]); @@ -3949,13 +3995,11 @@ static int ext4_commit_super(struct super_block *sb, int sync) else es->s_kbytes_written = cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); - if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeblocks_counter)) - ext4_free_blocks_count_set(es, percpu_counter_sum_positive( - &EXT4_SB(sb)->s_freeblocks_counter)); - if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) - es->s_free_inodes_count = - cpu_to_le32(percpu_counter_sum_positive( - &EXT4_SB(sb)->s_freeinodes_counter)); + ext4_free_blocks_count_set(es, percpu_counter_sum_positive( + &EXT4_SB(sb)->s_freeblocks_counter)); + es->s_free_inodes_count = + cpu_to_le32(percpu_counter_sum_positive( + &EXT4_SB(sb)->s_freeinodes_counter)); sb->s_dirt = 0; BUFFER_TRACE(sbh, "marking dirty"); mark_buffer_dirty(sbh); @@ -4135,6 +4179,22 @@ static int ext4_unfreeze(struct super_block *sb) return 0; } +/* + * Structure to save mount options for ext4_remount's benefit + */ +struct ext4_mount_options { + unsigned long s_mount_opt; + unsigned long s_mount_opt2; + uid_t s_resuid; + gid_t s_resgid; + unsigned long s_commit_interval; + u32 s_min_batch_time, s_max_batch_time; +#ifdef CONFIG_QUOTA + int s_jquota_fmt; + char *s_qf_names[MAXQUOTAS]; +#endif +}; + static int ext4_remount(struct super_block *sb, int *flags, char *data) { struct ext4_super_block *es; @@ -4155,6 +4215,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) lock_super(sb); old_sb_flags = sb->s_flags; old_opts.s_mount_opt = sbi->s_mount_opt; + old_opts.s_mount_opt2 = sbi->s_mount_opt2; old_opts.s_resuid = sbi->s_resuid; old_opts.s_resgid = sbi->s_resgid; old_opts.s_commit_interval = sbi->s_commit_interval; @@ -4308,6 +4369,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) restore_opts: sb->s_flags = old_sb_flags; sbi->s_mount_opt = old_opts.s_mount_opt; + sbi->s_mount_opt2 = old_opts.s_mount_opt2; sbi->s_resuid = old_opts.s_resuid; sbi->s_resgid = old_opts.s_resgid; sbi->s_commit_interval = old_opts.s_commit_interval; @@ -4556,12 +4618,10 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id, static int ext4_quota_off(struct super_block *sb, int type) { - /* Force all delayed allocation blocks to be allocated */ - if (test_opt(sb, DELALLOC)) { - down_read(&sb->s_umount); + /* Force all delayed allocation blocks to be allocated. + * Caller already holds s_umount sem */ + if (test_opt(sb, DELALLOC)) sync_filesystem(sb); - up_read(&sb->s_umount); - } return dquot_quota_off(sb, type); } @@ -4667,17 +4727,17 @@ out: #endif -static int ext4_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); + return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); } #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) static struct file_system_type ext2_fs_type = { .owner = THIS_MODULE, .name = "ext2", - .get_sb = ext4_get_sb, + .mount = ext4_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -4722,7 +4782,7 @@ static inline void unregister_as_ext3(void) { } static struct file_system_type ext4_fs_type = { .owner = THIS_MODULE, .name = "ext4", - .get_sb = ext4_get_sb, + .mount = ext4_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index fa4b899..fc32176 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -427,23 +427,23 @@ cleanup: static int ext4_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size) { - int i_error, b_error; + int ret, ret2; down_read(&EXT4_I(dentry->d_inode)->xattr_sem); - i_error = ext4_xattr_ibody_list(dentry, buffer, buffer_size); - if (i_error < 0) { - b_error = 0; - } else { - if (buffer) { - buffer += i_error; - buffer_size -= i_error; - } - b_error = ext4_xattr_block_list(dentry, buffer, buffer_size); - if (b_error < 0) - i_error = 0; + ret = ret2 = ext4_xattr_ibody_list(dentry, buffer, buffer_size); + if (ret < 0) + goto errout; + if (buffer) { + buffer += ret; + buffer_size -= ret; } + ret = ext4_xattr_block_list(dentry, buffer, buffer_size); + if (ret < 0) + goto errout; + ret += ret2; +errout: up_read(&EXT4_I(dentry->d_inode)->xattr_sem); - return i_error + b_error; + return ret; } /* @@ -947,7 +947,7 @@ ext4_xattr_ibody_set(handle_t *handle, struct inode *inode, /* * ext4_xattr_set_handle() * - * Create, replace or remove an extended attribute for this inode. Buffer + * Create, replace or remove an extended attribute for this inode. Value * is NULL to remove an existing extended attribute, and non-NULL to * either replace an existing extended attribute, or create a new extended * attribute. The flags XATTR_REPLACE and XATTR_CREATE diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 281dd83..1ef1652 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -122,7 +122,7 @@ ext4_xattr_put_super(struct super_block *sb) } static __init inline int -init_ext4_xattr(void) +ext4_init_xattr(void) { return 0; } diff --git a/fs/fat/inode.c b/fs/fat/inode.c index ad6998a..206351a 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -514,11 +514,18 @@ static struct inode *fat_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void fat_destroy_inode(struct inode *inode) +static void fat_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(fat_inode_cachep, MSDOS_I(inode)); } +static void fat_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, fat_i_callback); +} + static void init_once(void *foo) { struct msdos_inode_info *ei = (struct msdos_inode_info *)foo; @@ -743,7 +750,7 @@ static struct dentry *fat_fh_to_dentry(struct super_block *sb, */ result = d_obtain_alias(inode); if (!IS_ERR(result)) - result->d_op = sb->s_root->d_op; + d_set_d_op(result, sb->s_root->d_op); return result; } @@ -793,7 +800,7 @@ static struct dentry *fat_get_parent(struct dentry *child) parent = d_obtain_alias(inode); if (!IS_ERR(parent)) - parent->d_op = sb->s_root->d_op; + d_set_d_op(parent, sb->s_root->d_op); out: unlock_super(sb); diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c index bbca5c1..35ffe43 100644 --- a/fs/fat/namei_msdos.c +++ b/fs/fat/namei_msdos.c @@ -148,7 +148,8 @@ static int msdos_find(struct inode *dir, const unsigned char *name, int len, * that the existing dentry can be used. The msdos fs routines will * return ENOENT or EINVAL as appropriate. */ -static int msdos_hash(struct dentry *dentry, struct qstr *qstr) +static int msdos_hash(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options; unsigned char msdos_name[MSDOS_NAME]; @@ -164,16 +165,18 @@ static int msdos_hash(struct dentry *dentry, struct qstr *qstr) * Compare two msdos names. If either of the names are invalid, * we fall back to doing the standard name comparison. */ -static int msdos_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b) +static int msdos_cmp(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options; + struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options; unsigned char a_msdos_name[MSDOS_NAME], b_msdos_name[MSDOS_NAME]; int error; - error = msdos_format_name(a->name, a->len, a_msdos_name, options); + error = msdos_format_name(name->name, name->len, a_msdos_name, options); if (error) goto old_compare; - error = msdos_format_name(b->name, b->len, b_msdos_name, options); + error = msdos_format_name(str, len, b_msdos_name, options); if (error) goto old_compare; error = memcmp(a_msdos_name, b_msdos_name, MSDOS_NAME); @@ -182,8 +185,8 @@ out: old_compare: error = 1; - if (a->len == b->len) - error = memcmp(a->name, b->name, a->len); + if (name->len == len) + error = memcmp(name->name, str, len); goto out; } @@ -224,10 +227,10 @@ static struct dentry *msdos_lookup(struct inode *dir, struct dentry *dentry, } out: unlock_super(sb); - dentry->d_op = &msdos_dentry_operations; + d_set_d_op(dentry, &msdos_dentry_operations); dentry = d_splice_alias(inode, dentry); if (dentry) - dentry->d_op = &msdos_dentry_operations; + d_set_d_op(dentry, &msdos_dentry_operations); return dentry; error: @@ -670,23 +673,22 @@ static int msdos_fill_super(struct super_block *sb, void *data, int silent) } sb->s_flags |= MS_NOATIME; - sb->s_root->d_op = &msdos_dentry_operations; + d_set_d_op(sb->s_root, &msdos_dentry_operations); unlock_super(sb); return 0; } -static int msdos_get_sb(struct file_system_type *fs_type, +static struct dentry *msdos_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, msdos_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, msdos_fill_super); } static struct file_system_type msdos_fs_type = { .owner = THIS_MODULE, .name = "msdos", - .get_sb = msdos_get_sb, + .mount = msdos_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c index 6f0f6c9..e3ffc5e 100644 --- a/fs/fat/namei_vfat.c +++ b/fs/fat/namei_vfat.c @@ -43,6 +43,9 @@ static int vfat_revalidate_shortname(struct dentry *dentry) static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd) { + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + /* This is not negative dentry. Always valid. */ if (dentry->d_inode) return 1; @@ -51,6 +54,9 @@ static int vfat_revalidate(struct dentry *dentry, struct nameidata *nd) static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd) { + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + /* * This is not negative dentry. Always valid. * @@ -85,22 +91,26 @@ static int vfat_revalidate_ci(struct dentry *dentry, struct nameidata *nd) } /* returns the length of a struct qstr, ignoring trailing dots */ -static unsigned int vfat_striptail_len(struct qstr *qstr) +static unsigned int __vfat_striptail_len(unsigned int len, const char *name) { - unsigned int len = qstr->len; - - while (len && qstr->name[len - 1] == '.') + while (len && name[len - 1] == '.') len--; return len; } +static unsigned int vfat_striptail_len(const struct qstr *qstr) +{ + return __vfat_striptail_len(qstr->len, qstr->name); +} + /* * Compute the hash for the vfat name corresponding to the dentry. * Note: if the name is invalid, we leave the hash code unchanged so * that the existing dentry can be used. The vfat fs routines will * return ENOENT or EINVAL as appropriate. */ -static int vfat_hash(struct dentry *dentry, struct qstr *qstr) +static int vfat_hash(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { qstr->hash = full_name_hash(qstr->name, vfat_striptail_len(qstr)); return 0; @@ -112,9 +122,10 @@ static int vfat_hash(struct dentry *dentry, struct qstr *qstr) * that the existing dentry can be used. The vfat fs routines will * return ENOENT or EINVAL as appropriate. */ -static int vfat_hashi(struct dentry *dentry, struct qstr *qstr) +static int vfat_hashi(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { - struct nls_table *t = MSDOS_SB(dentry->d_inode->i_sb)->nls_io; + struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io; const unsigned char *name; unsigned int len; unsigned long hash; @@ -133,16 +144,18 @@ static int vfat_hashi(struct dentry *dentry, struct qstr *qstr) /* * Case insensitive compare of two vfat names. */ -static int vfat_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b) +static int vfat_cmpi(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - struct nls_table *t = MSDOS_SB(dentry->d_inode->i_sb)->nls_io; + struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io; unsigned int alen, blen; /* A filename cannot end in '.' or we treat it like it has none */ - alen = vfat_striptail_len(a); - blen = vfat_striptail_len(b); + alen = vfat_striptail_len(name); + blen = __vfat_striptail_len(len, str); if (alen == blen) { - if (nls_strnicmp(t, a->name, b->name, alen) == 0) + if (nls_strnicmp(t, name->name, str, alen) == 0) return 0; } return 1; @@ -151,15 +164,17 @@ static int vfat_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b) /* * Case sensitive compare of two vfat names. */ -static int vfat_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b) +static int vfat_cmp(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { unsigned int alen, blen; /* A filename cannot end in '.' or we treat it like it has none */ - alen = vfat_striptail_len(a); - blen = vfat_striptail_len(b); + alen = vfat_striptail_len(name); + blen = __vfat_striptail_len(len, str); if (alen == blen) { - if (strncmp(a->name, b->name, alen) == 0) + if (strncmp(name->name, str, alen) == 0) return 0; } return 1; @@ -757,11 +772,11 @@ static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry, out: unlock_super(sb); - dentry->d_op = sb->s_root->d_op; + d_set_d_op(dentry, sb->s_root->d_op); dentry->d_time = dentry->d_parent->d_inode->i_version; dentry = d_splice_alias(inode, dentry); if (dentry) { - dentry->d_op = sb->s_root->d_op; + d_set_d_op(dentry, sb->s_root->d_op); dentry->d_time = dentry->d_parent->d_inode->i_version; } return dentry; @@ -1063,26 +1078,25 @@ static int vfat_fill_super(struct super_block *sb, void *data, int silent) } if (MSDOS_SB(sb)->options.name_check != 's') - sb->s_root->d_op = &vfat_ci_dentry_ops; + d_set_d_op(sb->s_root, &vfat_ci_dentry_ops); else - sb->s_root->d_op = &vfat_dentry_ops; + d_set_d_op(sb->s_root, &vfat_dentry_ops); unlock_super(sb); return 0; } -static int vfat_get_sb(struct file_system_type *fs_type, +static struct dentry *vfat_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, vfat_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, vfat_fill_super); } static struct file_system_type vfat_fs_type = { .owner = THIS_MODULE, .name = "vfat", - .get_sb = vfat_get_sb, + .mount = vfat_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/filesystems.c b/fs/filesystems.c index 68ba492..751d6b2 100644 --- a/fs/filesystems.c +++ b/fs/filesystems.c @@ -115,6 +115,9 @@ int unregister_filesystem(struct file_system_type * fs) tmp = &(*tmp)->next; } write_unlock(&file_systems_lock); + + synchronize_rcu(); + return -EINVAL; } diff --git a/fs/freevxfs/vxfs_inode.c b/fs/freevxfs/vxfs_inode.c index 8c04eac..2ba6719 100644 --- a/fs/freevxfs/vxfs_inode.c +++ b/fs/freevxfs/vxfs_inode.c @@ -337,6 +337,13 @@ vxfs_iget(struct super_block *sbp, ino_t ino) return ip; } +static void vxfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(vxfs_inode_cachep, inode->i_private); +} + /** * vxfs_evict_inode - remove inode from main memory * @ip: inode to discard. @@ -350,5 +357,5 @@ vxfs_evict_inode(struct inode *ip) { truncate_inode_pages(&ip->i_data, 0); end_writeback(ip); - kmem_cache_free(vxfs_inode_cachep, ip->i_private); + call_rcu(&ip->i_rcu, vxfs_i_callback); } diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c index 71b0148..9d1c995 100644 --- a/fs/freevxfs/vxfs_super.c +++ b/fs/freevxfs/vxfs_super.c @@ -246,17 +246,16 @@ out: /* * The usual module blurb. */ -static int vxfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *vxfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, vxfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, vxfs_fill_super); } static struct file_system_type vxfs_fs_type = { .owner = THIS_MODULE, .name = "vxfs", - .get_sb = vxfs_get_sb, + .mount = vxfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index aed881a..3d06ccc 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -707,6 +707,17 @@ get_next_work_item(struct backing_dev_info *bdi) return work; } +/* + * Add in the number of potentially dirty inodes, because each inode + * write can dirty pagecache in the underlying blockdev. + */ +static unsigned long get_nr_dirty_pages(void) +{ + return global_page_state(NR_FILE_DIRTY) + + global_page_state(NR_UNSTABLE_NFS) + + get_nr_dirty_inodes(); +} + static long wb_check_old_data_flush(struct bdi_writeback *wb) { unsigned long expired; @@ -724,13 +735,7 @@ static long wb_check_old_data_flush(struct bdi_writeback *wb) return 0; wb->last_old_flush = jiffies; - /* - * Add in the number of potentially dirty inodes, because each inode - * write can dirty pagecache in the underlying blockdev. - */ - nr_pages = global_page_state(NR_FILE_DIRTY) + - global_page_state(NR_UNSTABLE_NFS) + - get_nr_dirty_inodes(); + nr_pages = get_nr_dirty_pages(); if (nr_pages) { struct wb_writeback_work work = { @@ -1076,32 +1081,42 @@ static void wait_sb_inodes(struct super_block *sb) } /** - * writeback_inodes_sb - writeback dirty inodes from given super_block + * writeback_inodes_sb_nr - writeback dirty inodes from given super_block * @sb: the superblock + * @nr: the number of pages to write * * Start writeback on some inodes on this super_block. No guarantees are made * on how many (if any) will be written, and this function does not wait - * for IO completion of submitted IO. The number of pages submitted is - * returned. + * for IO completion of submitted IO. */ -void writeback_inodes_sb(struct super_block *sb) +void writeback_inodes_sb_nr(struct super_block *sb, unsigned long nr) { - unsigned long nr_dirty = global_page_state(NR_FILE_DIRTY); - unsigned long nr_unstable = global_page_state(NR_UNSTABLE_NFS); DECLARE_COMPLETION_ONSTACK(done); struct wb_writeback_work work = { .sb = sb, .sync_mode = WB_SYNC_NONE, .done = &done, + .nr_pages = nr, }; WARN_ON(!rwsem_is_locked(&sb->s_umount)); - - work.nr_pages = nr_dirty + nr_unstable + get_nr_dirty_inodes(); - bdi_queue_work(sb->s_bdi, &work); wait_for_completion(&done); } +EXPORT_SYMBOL(writeback_inodes_sb_nr); + +/** + * writeback_inodes_sb - writeback dirty inodes from given super_block + * @sb: the superblock + * + * Start writeback on some inodes on this super_block. No guarantees are made + * on how many (if any) will be written, and this function does not wait + * for IO completion of submitted IO. + */ +void writeback_inodes_sb(struct super_block *sb) +{ + return writeback_inodes_sb_nr(sb, get_nr_dirty_pages()); +} EXPORT_SYMBOL(writeback_inodes_sb); /** @@ -1124,6 +1139,27 @@ int writeback_inodes_sb_if_idle(struct super_block *sb) EXPORT_SYMBOL(writeback_inodes_sb_if_idle); /** + * writeback_inodes_sb_if_idle - start writeback if none underway + * @sb: the superblock + * @nr: the number of pages to write + * + * Invoke writeback_inodes_sb if no writeback is currently underway. + * Returns 1 if writeback was started, 0 if not. + */ +int writeback_inodes_sb_nr_if_idle(struct super_block *sb, + unsigned long nr) +{ + if (!writeback_in_progress(sb->s_bdi)) { + down_read(&sb->s_umount); + writeback_inodes_sb_nr(sb, nr); + up_read(&sb->s_umount); + return 1; + } else + return 0; +} +EXPORT_SYMBOL(writeback_inodes_sb_nr_if_idle); + +/** * sync_inodes_sb - sync sb inode pages * @sb: the superblock * diff --git a/fs/fs_struct.c b/fs/fs_struct.c index ed45a9c..68ca487 100644 --- a/fs/fs_struct.c +++ b/fs/fs_struct.c @@ -14,12 +14,14 @@ void set_fs_root(struct fs_struct *fs, struct path *path) struct path old_root; spin_lock(&fs->lock); + write_seqcount_begin(&fs->seq); old_root = fs->root; fs->root = *path; - path_get(path); + path_get_long(path); + write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); if (old_root.dentry) - path_put(&old_root); + path_put_long(&old_root); } /* @@ -31,13 +33,15 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path) struct path old_pwd; spin_lock(&fs->lock); + write_seqcount_begin(&fs->seq); old_pwd = fs->pwd; fs->pwd = *path; - path_get(path); + path_get_long(path); + write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); if (old_pwd.dentry) - path_put(&old_pwd); + path_put_long(&old_pwd); } void chroot_fs_refs(struct path *old_root, struct path *new_root) @@ -52,31 +56,33 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root) fs = p->fs; if (fs) { spin_lock(&fs->lock); + write_seqcount_begin(&fs->seq); if (fs->root.dentry == old_root->dentry && fs->root.mnt == old_root->mnt) { - path_get(new_root); + path_get_long(new_root); fs->root = *new_root; count++; } if (fs->pwd.dentry == old_root->dentry && fs->pwd.mnt == old_root->mnt) { - path_get(new_root); + path_get_long(new_root); fs->pwd = *new_root; count++; } + write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); } task_unlock(p); } while_each_thread(g, p); read_unlock(&tasklist_lock); while (count--) - path_put(old_root); + path_put_long(old_root); } void free_fs_struct(struct fs_struct *fs) { - path_put(&fs->root); - path_put(&fs->pwd); + path_put_long(&fs->root); + path_put_long(&fs->pwd); kmem_cache_free(fs_cachep, fs); } @@ -88,8 +94,10 @@ void exit_fs(struct task_struct *tsk) int kill; task_lock(tsk); spin_lock(&fs->lock); + write_seqcount_begin(&fs->seq); tsk->fs = NULL; kill = !--fs->users; + write_seqcount_end(&fs->seq); spin_unlock(&fs->lock); task_unlock(tsk); if (kill) @@ -105,8 +113,15 @@ struct fs_struct *copy_fs_struct(struct fs_struct *old) fs->users = 1; fs->in_exec = 0; spin_lock_init(&fs->lock); + seqcount_init(&fs->seq); fs->umask = old->umask; - get_fs_root_and_pwd(old, &fs->root, &fs->pwd); + + spin_lock(&old->lock); + fs->root = old->root; + path_get_long(&fs->root); + fs->pwd = old->pwd; + path_get_long(&fs->pwd); + spin_unlock(&old->lock); } return fs; } @@ -144,6 +159,7 @@ EXPORT_SYMBOL(current_umask); struct fs_struct init_fs = { .users = 1, .lock = __SPIN_LOCK_UNLOCKED(init_fs.lock), + .seq = SEQCNT_ZERO, .umask = 0022, }; diff --git a/fs/fuse/control.c b/fs/fuse/control.c index 4eba076..85542a7 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -322,12 +322,10 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent) return 0; } -static int fuse_ctl_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data, - struct vfsmount *mnt) +static struct dentry *fuse_ctl_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data) { - return get_sb_single(fs_type, flags, raw_data, - fuse_ctl_fill_super, mnt); + return mount_single(fs_type, flags, raw_data, fuse_ctl_fill_super); } static void fuse_ctl_kill_sb(struct super_block *sb) @@ -346,7 +344,7 @@ static void fuse_ctl_kill_sb(struct super_block *sb) static struct file_system_type fuse_ctl_fs_type = { .owner = THIS_MODULE, .name = "fusectl", - .get_sb = fuse_ctl_get_sb, + .mount = fuse_ctl_mount, .kill_sb = fuse_ctl_kill_sb, }; diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 6e07696..cf8d28d 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -251,6 +251,20 @@ static void queue_request(struct fuse_conn *fc, struct fuse_req *req) kill_fasync(&fc->fasync, SIGIO, POLL_IN); } +void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, + u64 nodeid, u64 nlookup) +{ + forget->forget_one.nodeid = nodeid; + forget->forget_one.nlookup = nlookup; + + spin_lock(&fc->lock); + fc->forget_list_tail->next = forget; + fc->forget_list_tail = forget; + wake_up(&fc->waitq); + kill_fasync(&fc->fasync, SIGIO, POLL_IN); + spin_unlock(&fc->lock); +} + static void flush_bg_queue(struct fuse_conn *fc) { while (fc->active_background < fc->max_background && @@ -438,12 +452,6 @@ static void fuse_request_send_nowait(struct fuse_conn *fc, struct fuse_req *req) } } -void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req) -{ - req->isreply = 0; - fuse_request_send_nowait(fc, req); -} - void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req) { req->isreply = 1; @@ -896,9 +904,15 @@ static int fuse_copy_args(struct fuse_copy_state *cs, unsigned numargs, return err; } +static int forget_pending(struct fuse_conn *fc) +{ + return fc->forget_list_head.next != NULL; +} + static int request_pending(struct fuse_conn *fc) { - return !list_empty(&fc->pending) || !list_empty(&fc->interrupts); + return !list_empty(&fc->pending) || !list_empty(&fc->interrupts) || + forget_pending(fc); } /* Wait until a request is available on the pending list */ @@ -960,6 +974,120 @@ __releases(fc->lock) return err ? err : reqsize; } +static struct fuse_forget_link *dequeue_forget(struct fuse_conn *fc, + unsigned max, + unsigned *countp) +{ + struct fuse_forget_link *head = fc->forget_list_head.next; + struct fuse_forget_link **newhead = &head; + unsigned count; + + for (count = 0; *newhead != NULL && count < max; count++) + newhead = &(*newhead)->next; + + fc->forget_list_head.next = *newhead; + *newhead = NULL; + if (fc->forget_list_head.next == NULL) + fc->forget_list_tail = &fc->forget_list_head; + + if (countp != NULL) + *countp = count; + + return head; +} + +static int fuse_read_single_forget(struct fuse_conn *fc, + struct fuse_copy_state *cs, + size_t nbytes) +__releases(fc->lock) +{ + int err; + struct fuse_forget_link *forget = dequeue_forget(fc, 1, NULL); + struct fuse_forget_in arg = { + .nlookup = forget->forget_one.nlookup, + }; + struct fuse_in_header ih = { + .opcode = FUSE_FORGET, + .nodeid = forget->forget_one.nodeid, + .unique = fuse_get_unique(fc), + .len = sizeof(ih) + sizeof(arg), + }; + + spin_unlock(&fc->lock); + kfree(forget); + if (nbytes < ih.len) + return -EINVAL; + + err = fuse_copy_one(cs, &ih, sizeof(ih)); + if (!err) + err = fuse_copy_one(cs, &arg, sizeof(arg)); + fuse_copy_finish(cs); + + if (err) + return err; + + return ih.len; +} + +static int fuse_read_batch_forget(struct fuse_conn *fc, + struct fuse_copy_state *cs, size_t nbytes) +__releases(fc->lock) +{ + int err; + unsigned max_forgets; + unsigned count; + struct fuse_forget_link *head; + struct fuse_batch_forget_in arg = { .count = 0 }; + struct fuse_in_header ih = { + .opcode = FUSE_BATCH_FORGET, + .unique = fuse_get_unique(fc), + .len = sizeof(ih) + sizeof(arg), + }; + + if (nbytes < ih.len) { + spin_unlock(&fc->lock); + return -EINVAL; + } + + max_forgets = (nbytes - ih.len) / sizeof(struct fuse_forget_one); + head = dequeue_forget(fc, max_forgets, &count); + spin_unlock(&fc->lock); + + arg.count = count; + ih.len += count * sizeof(struct fuse_forget_one); + err = fuse_copy_one(cs, &ih, sizeof(ih)); + if (!err) + err = fuse_copy_one(cs, &arg, sizeof(arg)); + + while (head) { + struct fuse_forget_link *forget = head; + + if (!err) { + err = fuse_copy_one(cs, &forget->forget_one, + sizeof(forget->forget_one)); + } + head = forget->next; + kfree(forget); + } + + fuse_copy_finish(cs); + + if (err) + return err; + + return ih.len; +} + +static int fuse_read_forget(struct fuse_conn *fc, struct fuse_copy_state *cs, + size_t nbytes) +__releases(fc->lock) +{ + if (fc->minor < 16 || fc->forget_list_head.next->next == NULL) + return fuse_read_single_forget(fc, cs, nbytes); + else + return fuse_read_batch_forget(fc, cs, nbytes); +} + /* * Read a single request into the userspace filesystem's buffer. This * function waits until a request is available, then removes it from @@ -998,6 +1126,14 @@ static ssize_t fuse_dev_do_read(struct fuse_conn *fc, struct file *file, return fuse_read_interrupt(fc, cs, nbytes, req); } + if (forget_pending(fc)) { + if (list_empty(&fc->pending) || fc->forget_batch-- > 0) + return fuse_read_forget(fc, cs, nbytes); + + if (fc->forget_batch <= -8) + fc->forget_batch = 16; + } + req = list_entry(fc->pending.next, struct fuse_req, list); req->state = FUSE_REQ_READING; list_move(&req->list, &fc->io); @@ -1090,7 +1226,7 @@ static ssize_t fuse_dev_splice_read(struct file *in, loff_t *ppos, if (!fc) return -EPERM; - bufs = kmalloc(pipe->buffers * sizeof (struct pipe_buffer), GFP_KERNEL); + bufs = kmalloc(pipe->buffers * sizeof(struct pipe_buffer), GFP_KERNEL); if (!bufs) return -ENOMEM; @@ -1626,7 +1762,7 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe, if (!fc) return -EPERM; - bufs = kmalloc(pipe->buffers * sizeof (struct pipe_buffer), GFP_KERNEL); + bufs = kmalloc(pipe->buffers * sizeof(struct pipe_buffer), GFP_KERNEL); if (!bufs) return -ENOMEM; @@ -1770,6 +1906,8 @@ __acquires(fc->lock) flush_bg_queue(fc); end_requests(fc, &fc->pending); end_requests(fc, &fc->processing); + while (forget_pending(fc)) + kfree(dequeue_forget(fc, 1, NULL)); } /* diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index c9627c9..042af73 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -10,9 +10,9 @@ #include <linux/pagemap.h> #include <linux/file.h> -#include <linux/gfp.h> #include <linux/sched.h> #include <linux/namei.h> +#include <linux/slab.h> #if BITS_PER_LONG >= 64 static inline void fuse_dentry_settime(struct dentry *entry, u64 time) @@ -156,8 +156,12 @@ u64 fuse_get_attr_version(struct fuse_conn *fc) */ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) { - struct inode *inode = entry->d_inode; + struct inode *inode; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = entry->d_inode; if (inode && is_bad_inode(inode)) return 0; else if (fuse_dentry_time(entry) < get_jiffies_64()) { @@ -165,7 +169,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) struct fuse_entry_out outarg; struct fuse_conn *fc; struct fuse_req *req; - struct fuse_req *forget_req; + struct fuse_forget_link *forget; struct dentry *parent; u64 attr_version; @@ -178,8 +182,8 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) if (IS_ERR(req)) return 0; - forget_req = fuse_get_req(fc); - if (IS_ERR(forget_req)) { + forget = fuse_alloc_forget(); + if (!forget) { fuse_put_request(fc, req); return 0; } @@ -199,15 +203,14 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd) if (!err) { struct fuse_inode *fi = get_fuse_inode(inode); if (outarg.nodeid != get_node_id(inode)) { - fuse_send_forget(fc, forget_req, - outarg.nodeid, 1); + fuse_queue_forget(fc, forget, outarg.nodeid, 1); return 0; } spin_lock(&fc->lock); fi->nlookup++; spin_unlock(&fc->lock); } - fuse_put_request(fc, forget_req); + kfree(forget); if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT) return 0; @@ -259,7 +262,7 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, { struct fuse_conn *fc = get_fuse_conn_super(sb); struct fuse_req *req; - struct fuse_req *forget_req; + struct fuse_forget_link *forget; u64 attr_version; int err; @@ -273,9 +276,9 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, if (IS_ERR(req)) goto out; - forget_req = fuse_get_req(fc); - err = PTR_ERR(forget_req); - if (IS_ERR(forget_req)) { + forget = fuse_alloc_forget(); + err = -ENOMEM; + if (!forget) { fuse_put_request(fc, req); goto out; } @@ -301,13 +304,13 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, attr_version); err = -ENOMEM; if (!*inode) { - fuse_send_forget(fc, forget_req, outarg->nodeid, 1); + fuse_queue_forget(fc, forget, outarg->nodeid, 1); goto out; } err = 0; out_put_forget: - fuse_put_request(fc, forget_req); + kfree(forget); out: return err; } @@ -347,7 +350,7 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry, } entry = newent ? newent : entry; - entry->d_op = &fuse_dentry_operations; + d_set_d_op(entry, &fuse_dentry_operations); if (outarg_valid) fuse_change_entry_timeout(entry, &outarg); else @@ -374,7 +377,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, struct inode *inode; struct fuse_conn *fc = get_fuse_conn(dir); struct fuse_req *req; - struct fuse_req *forget_req; + struct fuse_forget_link *forget; struct fuse_create_in inarg; struct fuse_open_out outopen; struct fuse_entry_out outentry; @@ -388,9 +391,9 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, if (flags & O_DIRECT) return -EINVAL; - forget_req = fuse_get_req(fc); - if (IS_ERR(forget_req)) - return PTR_ERR(forget_req); + forget = fuse_alloc_forget(); + if (!forget) + return -ENOMEM; req = fuse_get_req(fc); err = PTR_ERR(req); @@ -448,10 +451,10 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, if (!inode) { flags &= ~(O_CREAT | O_EXCL | O_TRUNC); fuse_sync_release(ff, flags); - fuse_send_forget(fc, forget_req, outentry.nodeid, 1); + fuse_queue_forget(fc, forget, outentry.nodeid, 1); return -ENOMEM; } - fuse_put_request(fc, forget_req); + kfree(forget); d_instantiate(entry, inode); fuse_change_entry_timeout(entry, &outentry); fuse_invalidate_attr(dir); @@ -469,7 +472,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode, out_put_request: fuse_put_request(fc, req); out_put_forget_req: - fuse_put_request(fc, forget_req); + kfree(forget); return err; } @@ -483,12 +486,12 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, struct fuse_entry_out outarg; struct inode *inode; int err; - struct fuse_req *forget_req; + struct fuse_forget_link *forget; - forget_req = fuse_get_req(fc); - if (IS_ERR(forget_req)) { + forget = fuse_alloc_forget(); + if (!forget) { fuse_put_request(fc, req); - return PTR_ERR(forget_req); + return -ENOMEM; } memset(&outarg, 0, sizeof(outarg)); @@ -515,10 +518,10 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation, &outarg.attr, entry_attr_timeout(&outarg), 0); if (!inode) { - fuse_send_forget(fc, forget_req, outarg.nodeid, 1); + fuse_queue_forget(fc, forget, outarg.nodeid, 1); return -ENOMEM; } - fuse_put_request(fc, forget_req); + kfree(forget); if (S_ISDIR(inode->i_mode)) { struct dentry *alias; @@ -541,7 +544,7 @@ static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req, return 0; out_put_forget_req: - fuse_put_request(fc, forget_req); + kfree(forget); return err; } @@ -981,12 +984,15 @@ static int fuse_access(struct inode *inode, int mask) * access request is sent. Execute permission is still checked * locally based on file mode. */ -static int fuse_permission(struct inode *inode, int mask) +static int fuse_permission(struct inode *inode, int mask, unsigned int flags) { struct fuse_conn *fc = get_fuse_conn(inode); bool refreshed = false; int err = 0; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + if (!fuse_allow_task(fc, current)) return -EACCES; @@ -1001,7 +1007,7 @@ static int fuse_permission(struct inode *inode, int mask) } if (fc->flags & FUSE_DEFAULT_PERMISSIONS) { - err = generic_permission(inode, mask, NULL); + err = generic_permission(inode, mask, flags, NULL); /* If permission is denied, try to refresh file attributes. This is also needed, because the root @@ -1009,7 +1015,8 @@ static int fuse_permission(struct inode *inode, int mask) if (err == -EACCES && !refreshed) { err = fuse_do_getattr(inode, NULL, NULL); if (!err) - err = generic_permission(inode, mask, NULL); + err = generic_permission(inode, mask, + flags, NULL); } /* Note: the opposite of the above test does not diff --git a/fs/fuse/file.c b/fs/fuse/file.c index c822458..95da1bc 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -13,6 +13,7 @@ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/module.h> +#include <linux/compat.h> static const struct file_operations fuse_direct_io_file_operations; @@ -134,6 +135,7 @@ EXPORT_SYMBOL_GPL(fuse_do_open); void fuse_finish_open(struct inode *inode, struct file *file) { struct fuse_file *ff = file->private_data; + struct fuse_conn *fc = get_fuse_conn(inode); if (ff->open_flags & FOPEN_DIRECT_IO) file->f_op = &fuse_direct_io_file_operations; @@ -141,6 +143,15 @@ void fuse_finish_open(struct inode *inode, struct file *file) invalidate_inode_pages2(inode->i_mapping); if (ff->open_flags & FOPEN_NONSEEKABLE) nonseekable_open(inode, file); + if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) { + struct fuse_inode *fi = get_fuse_inode(inode); + + spin_lock(&fc->lock); + fi->attr_version = ++fc->attr_version; + i_size_write(inode, 0); + spin_unlock(&fc->lock); + fuse_invalidate_attr(inode); + } } int fuse_open_common(struct inode *inode, struct file *file, bool isdir) @@ -1618,6 +1629,94 @@ static int fuse_ioctl_copy_user(struct page **pages, struct iovec *iov, } /* + * CUSE servers compiled on 32bit broke on 64bit kernels because the + * ABI was defined to be 'struct iovec' which is different on 32bit + * and 64bit. Fortunately we can determine which structure the server + * used from the size of the reply. + */ +static int fuse_copy_ioctl_iovec_old(struct iovec *dst, void *src, + size_t transferred, unsigned count, + bool is_compat) +{ +#ifdef CONFIG_COMPAT + if (count * sizeof(struct compat_iovec) == transferred) { + struct compat_iovec *ciov = src; + unsigned i; + + /* + * With this interface a 32bit server cannot support + * non-compat (i.e. ones coming from 64bit apps) ioctl + * requests + */ + if (!is_compat) + return -EINVAL; + + for (i = 0; i < count; i++) { + dst[i].iov_base = compat_ptr(ciov[i].iov_base); + dst[i].iov_len = ciov[i].iov_len; + } + return 0; + } +#endif + + if (count * sizeof(struct iovec) != transferred) + return -EIO; + + memcpy(dst, src, transferred); + return 0; +} + +/* Make sure iov_length() won't overflow */ +static int fuse_verify_ioctl_iov(struct iovec *iov, size_t count) +{ + size_t n; + u32 max = FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT; + + for (n = 0; n < count; n++) { + if (iov->iov_len > (size_t) max) + return -ENOMEM; + max -= iov->iov_len; + } + return 0; +} + +static int fuse_copy_ioctl_iovec(struct fuse_conn *fc, struct iovec *dst, + void *src, size_t transferred, unsigned count, + bool is_compat) +{ + unsigned i; + struct fuse_ioctl_iovec *fiov = src; + + if (fc->minor < 16) { + return fuse_copy_ioctl_iovec_old(dst, src, transferred, + count, is_compat); + } + + if (count * sizeof(struct fuse_ioctl_iovec) != transferred) + return -EIO; + + for (i = 0; i < count; i++) { + /* Did the server supply an inappropriate value? */ + if (fiov[i].base != (unsigned long) fiov[i].base || + fiov[i].len != (unsigned long) fiov[i].len) + return -EIO; + + dst[i].iov_base = (void __user *) (unsigned long) fiov[i].base; + dst[i].iov_len = (size_t) fiov[i].len; + +#ifdef CONFIG_COMPAT + if (is_compat && + (ptr_to_compat(dst[i].iov_base) != fiov[i].base || + (compat_size_t) dst[i].iov_len != fiov[i].len)) + return -EIO; +#endif + } + + return 0; +} + + +/* * For ioctls, there is no generic way to determine how much memory * needs to be read and/or written. Furthermore, ioctls are allowed * to dereference the passed pointer, so the parameter requires deep @@ -1677,18 +1776,25 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, struct fuse_ioctl_out outarg; struct fuse_req *req = NULL; struct page **pages = NULL; - struct page *iov_page = NULL; + struct iovec *iov_page = NULL; struct iovec *in_iov = NULL, *out_iov = NULL; unsigned int in_iovs = 0, out_iovs = 0, num_pages = 0, max_pages; size_t in_size, out_size, transferred; int err; +#if BITS_PER_LONG == 32 + inarg.flags |= FUSE_IOCTL_32BIT; +#else + if (flags & FUSE_IOCTL_COMPAT) + inarg.flags |= FUSE_IOCTL_32BIT; +#endif + /* assume all the iovs returned by client always fits in a page */ - BUILD_BUG_ON(sizeof(struct iovec) * FUSE_IOCTL_MAX_IOV > PAGE_SIZE); + BUILD_BUG_ON(sizeof(struct fuse_ioctl_iovec) * FUSE_IOCTL_MAX_IOV > PAGE_SIZE); err = -ENOMEM; pages = kzalloc(sizeof(pages[0]) * FUSE_MAX_PAGES_PER_REQ, GFP_KERNEL); - iov_page = alloc_page(GFP_KERNEL); + iov_page = (struct iovec *) __get_free_page(GFP_KERNEL); if (!pages || !iov_page) goto out; @@ -1697,7 +1803,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, * RETRY from server is not allowed. */ if (!(flags & FUSE_IOCTL_UNRESTRICTED)) { - struct iovec *iov = page_address(iov_page); + struct iovec *iov = iov_page; iov->iov_base = (void __user *)arg; iov->iov_len = _IOC_SIZE(cmd); @@ -1778,7 +1884,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, /* did it ask for retry? */ if (outarg.flags & FUSE_IOCTL_RETRY) { - char *vaddr; + void *vaddr; /* no retry if in restricted mode */ err = -EIO; @@ -1798,18 +1904,25 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, in_iovs + out_iovs > FUSE_IOCTL_MAX_IOV) goto out; - err = -EIO; - if ((in_iovs + out_iovs) * sizeof(struct iovec) != transferred) - goto out; - - /* okay, copy in iovs and retry */ vaddr = kmap_atomic(pages[0], KM_USER0); - memcpy(page_address(iov_page), vaddr, transferred); + err = fuse_copy_ioctl_iovec(fc, iov_page, vaddr, + transferred, in_iovs + out_iovs, + (flags & FUSE_IOCTL_COMPAT) != 0); kunmap_atomic(vaddr, KM_USER0); + if (err) + goto out; - in_iov = page_address(iov_page); + in_iov = iov_page; out_iov = in_iov + in_iovs; + err = fuse_verify_ioctl_iov(in_iov, in_iovs); + if (err) + goto out; + + err = fuse_verify_ioctl_iov(out_iov, out_iovs); + if (err) + goto out; + goto retry; } @@ -1821,8 +1934,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, out: if (req) fuse_put_request(fc, req); - if (iov_page) - __free_page(iov_page); + free_page((unsigned long) iov_page); while (num_pages) __free_page(pages[--num_pages]); kfree(pages); diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 57d4a3a..ae5744a 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -53,6 +53,12 @@ extern struct mutex fuse_mutex; extern unsigned max_user_bgreq; extern unsigned max_user_congthresh; +/* One forget request */ +struct fuse_forget_link { + struct fuse_forget_one forget_one; + struct fuse_forget_link *next; +}; + /** FUSE inode */ struct fuse_inode { /** Inode data */ @@ -66,7 +72,7 @@ struct fuse_inode { u64 nlookup; /** The request used for sending the FORGET message */ - struct fuse_req *forget_req; + struct fuse_forget_link *forget; /** Time in jiffies until the file attributes are valid */ u64 i_time; @@ -255,7 +261,6 @@ struct fuse_req { /** Data for asynchronous requests */ union { - struct fuse_forget_in forget_in; struct { struct fuse_release_in in; struct path path; @@ -369,6 +374,13 @@ struct fuse_conn { /** Pending interrupts */ struct list_head interrupts; + /** Queue of pending forgets */ + struct fuse_forget_link forget_list_head; + struct fuse_forget_link *forget_list_tail; + + /** Batching of FORGET requests (positive indicates FORGET batch) */ + int forget_batch; + /** Flag indicating if connection is blocked. This will be the case before the INIT reply is received, and if there are too many outstading backgrounds requests */ @@ -543,8 +555,10 @@ int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, /** * Send FORGET command */ -void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, - u64 nodeid, u64 nlookup); +void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, + u64 nodeid, u64 nlookup); + +struct fuse_forget_link *fuse_alloc_forget(void); /** * Initialize READ or READDIR request @@ -656,11 +670,6 @@ void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); /** - * Send a request with no reply - */ -void fuse_request_send_noreply(struct fuse_conn *fc, struct fuse_req *req); - -/** * Send a request in the background */ void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req); diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index da9e6e1..f62b32c 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -71,6 +71,11 @@ struct fuse_mount_data { unsigned blksize; }; +struct fuse_forget_link *fuse_alloc_forget() +{ + return kzalloc(sizeof(struct fuse_forget_link), GFP_KERNEL); +} + static struct inode *fuse_alloc_inode(struct super_block *sb) { struct inode *inode; @@ -90,8 +95,8 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) INIT_LIST_HEAD(&fi->queued_writes); INIT_LIST_HEAD(&fi->writepages); init_waitqueue_head(&fi->page_waitq); - fi->forget_req = fuse_request_alloc(); - if (!fi->forget_req) { + fi->forget = fuse_alloc_forget(); + if (!fi->forget) { kmem_cache_free(fuse_inode_cachep, inode); return NULL; } @@ -99,27 +104,20 @@ static struct inode *fuse_alloc_inode(struct super_block *sb) return inode; } -static void fuse_destroy_inode(struct inode *inode) +static void fuse_i_callback(struct rcu_head *head) { - struct fuse_inode *fi = get_fuse_inode(inode); - BUG_ON(!list_empty(&fi->write_files)); - BUG_ON(!list_empty(&fi->queued_writes)); - if (fi->forget_req) - fuse_request_free(fi->forget_req); + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(fuse_inode_cachep, inode); } -void fuse_send_forget(struct fuse_conn *fc, struct fuse_req *req, - u64 nodeid, u64 nlookup) +static void fuse_destroy_inode(struct inode *inode) { - struct fuse_forget_in *inarg = &req->misc.forget_in; - inarg->nlookup = nlookup; - req->in.h.opcode = FUSE_FORGET; - req->in.h.nodeid = nodeid; - req->in.numargs = 1; - req->in.args[0].size = sizeof(struct fuse_forget_in); - req->in.args[0].value = inarg; - fuse_request_send_noreply(fc, req); + struct fuse_inode *fi = get_fuse_inode(inode); + BUG_ON(!list_empty(&fi->write_files)); + BUG_ON(!list_empty(&fi->queued_writes)); + kfree(fi->forget); + call_rcu(&inode->i_rcu, fuse_i_callback); } static void fuse_evict_inode(struct inode *inode) @@ -129,8 +127,8 @@ static void fuse_evict_inode(struct inode *inode) if (inode->i_sb->s_flags & MS_ACTIVE) { struct fuse_conn *fc = get_fuse_conn(inode); struct fuse_inode *fi = get_fuse_inode(inode); - fuse_send_forget(fc, fi->forget_req, fi->nodeid, fi->nlookup); - fi->forget_req = NULL; + fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup); + fi->forget = NULL; } } @@ -534,6 +532,7 @@ void fuse_conn_init(struct fuse_conn *fc) INIT_LIST_HEAD(&fc->interrupts); INIT_LIST_HEAD(&fc->bg_queue); INIT_LIST_HEAD(&fc->entry); + fc->forget_list_tail = &fc->forget_list_head; atomic_set(&fc->num_waiting, 0); fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND; fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD; @@ -619,7 +618,7 @@ static struct dentry *fuse_get_dentry(struct super_block *sb, entry = d_obtain_alias(inode); if (!IS_ERR(entry) && get_node_id(inode) != FUSE_ROOT_ID) { - entry->d_op = &fuse_dentry_operations; + d_set_d_op(entry, &fuse_dentry_operations); fuse_invalidate_entry_cache(entry); } @@ -721,7 +720,7 @@ static struct dentry *fuse_get_parent(struct dentry *child) parent = d_obtain_alias(inode); if (!IS_ERR(parent) && get_node_id(inode) != FUSE_ROOT_ID) { - parent->d_op = &fuse_dentry_operations; + d_set_d_op(parent, &fuse_dentry_operations); fuse_invalidate_entry_cache(parent); } @@ -1041,11 +1040,11 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent) return err; } -static int fuse_get_sb(struct file_system_type *fs_type, +static struct dentry *fuse_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *raw_data, struct vfsmount *mnt) + void *raw_data) { - return get_sb_nodev(fs_type, flags, raw_data, fuse_fill_super, mnt); + return mount_nodev(fs_type, flags, raw_data, fuse_fill_super); } static void fuse_kill_sb_anon(struct super_block *sb) @@ -1065,17 +1064,16 @@ static struct file_system_type fuse_fs_type = { .owner = THIS_MODULE, .name = "fuse", .fs_flags = FS_HAS_SUBTYPE, - .get_sb = fuse_get_sb, + .mount = fuse_mount, .kill_sb = fuse_kill_sb_anon, }; #ifdef CONFIG_BLOCK -static int fuse_get_sb_blk(struct file_system_type *fs_type, +static struct dentry *fuse_mount_blk(struct file_system_type *fs_type, int flags, const char *dev_name, - void *raw_data, struct vfsmount *mnt) + void *raw_data) { - return get_sb_bdev(fs_type, flags, dev_name, raw_data, fuse_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, raw_data, fuse_fill_super); } static void fuse_kill_sb_blk(struct super_block *sb) @@ -1094,7 +1092,7 @@ static void fuse_kill_sb_blk(struct super_block *sb) static struct file_system_type fuseblk_fs_type = { .owner = THIS_MODULE, .name = "fuseblk", - .get_sb = fuse_get_sb_blk, + .mount = fuse_mount_blk, .kill_sb = fuse_kill_sb_blk, .fs_flags = FS_REQUIRES_DEV | FS_HAS_SUBTYPE, }; diff --git a/fs/generic_acl.c b/fs/generic_acl.c index 6bc9e3a..06c48a8 100644 --- a/fs/generic_acl.c +++ b/fs/generic_acl.c @@ -190,14 +190,20 @@ generic_acl_chmod(struct inode *inode) } int -generic_check_acl(struct inode *inode, int mask) +generic_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct posix_acl *acl = get_cached_acl(inode, ACL_TYPE_ACCESS); - - if (acl) { - int error = posix_acl_permission(inode, acl, mask); - posix_acl_release(acl); - return error; + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + return -ECHILD; + } else { + struct posix_acl *acl; + + acl = get_cached_acl(inode, ACL_TYPE_ACCESS); + if (acl) { + int error = posix_acl_permission(inode, acl, mask); + posix_acl_release(acl); + return error; + } } return -EAGAIN; } diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c index 48171f4..7118f1a 100644 --- a/fs/gfs2/acl.c +++ b/fs/gfs2/acl.c @@ -75,11 +75,14 @@ static struct posix_acl *gfs2_acl_get(struct gfs2_inode *ip, int type) * Returns: errno */ -int gfs2_check_acl(struct inode *inode, int mask) +int gfs2_check_acl(struct inode *inode, int mask, unsigned int flags) { struct posix_acl *acl; int error; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + acl = gfs2_acl_get(GFS2_I(inode), ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h index b522b0c..a93907c 100644 --- a/fs/gfs2/acl.h +++ b/fs/gfs2/acl.h @@ -16,7 +16,7 @@ #define GFS2_POSIX_ACL_DEFAULT "posix_acl_default" #define GFS2_ACL_MAX_ENTRIES 25 -extern int gfs2_check_acl(struct inode *inode, int mask); +extern int gfs2_check_acl(struct inode *inode, int mask, unsigned int); extern int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode); extern int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr); extern const struct xattr_handler gfs2_xattr_system_handler; diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 5476c06..3c4039d 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -763,7 +763,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh, int metadata; unsigned int revokes = 0; int x; - int error; + int error = 0; if (!*top) sm->sm_first = 0; @@ -780,7 +780,11 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh, if (metadata) revokes = (height) ? sdp->sd_inptrs : sdp->sd_diptrs; - error = gfs2_rindex_hold(sdp, &ip->i_alloc->al_ri_gh); + if (ip != GFS2_I(sdp->sd_rindex)) + error = gfs2_rindex_hold(sdp, &ip->i_alloc->al_ri_gh); + else if (!sdp->sd_rgrps) + error = gfs2_ri_update(ip); + if (error) return error; @@ -879,7 +883,8 @@ out_rg_gunlock: out_rlist: gfs2_rlist_free(&rlist); out: - gfs2_glock_dq_uninit(&ip->i_alloc->al_ri_gh); + if (ip != GFS2_I(sdp->sd_rindex)) + gfs2_glock_dq_uninit(&ip->i_alloc->al_ri_gh); return error; } diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c index 6798755..4a45633 100644 --- a/fs/gfs2/dentry.c +++ b/fs/gfs2/dentry.c @@ -11,6 +11,7 @@ #include <linux/completion.h> #include <linux/buffer_head.h> #include <linux/gfs2_ondisk.h> +#include <linux/namei.h> #include <linux/crc32.h> #include "gfs2.h" @@ -34,15 +35,23 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd) { - struct dentry *parent = dget_parent(dentry); - struct gfs2_sbd *sdp = GFS2_SB(parent->d_inode); - struct gfs2_inode *dip = GFS2_I(parent->d_inode); - struct inode *inode = dentry->d_inode; + struct dentry *parent; + struct gfs2_sbd *sdp; + struct gfs2_inode *dip; + struct inode *inode; struct gfs2_holder d_gh; struct gfs2_inode *ip = NULL; int error; int had_lock = 0; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + parent = dget_parent(dentry); + sdp = GFS2_SB(parent->d_inode); + dip = GFS2_I(parent->d_inode); + inode = dentry->d_inode; + if (inode) { if (is_bad_inode(inode)) goto invalid; @@ -100,13 +109,14 @@ fail: return 0; } -static int gfs2_dhash(struct dentry *dentry, struct qstr *str) +static int gfs2_dhash(const struct dentry *dentry, const struct inode *inode, + struct qstr *str) { str->hash = gfs2_disk_hash(str->name, str->len); return 0; } -static int gfs2_dentry_delete(struct dentry *dentry) +static int gfs2_dentry_delete(const struct dentry *dentry) { struct gfs2_inode *ginode; diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c index 06d5827..97012ec 100644 --- a/fs/gfs2/export.c +++ b/fs/gfs2/export.c @@ -130,7 +130,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child) dentry = d_obtain_alias(gfs2_lookupi(child->d_inode, &gfs2_qdotdot, 1)); if (!IS_ERR(dentry)) - dentry->d_op = &gfs2_dops; + d_set_d_op(dentry, &gfs2_dops); return dentry; } @@ -138,10 +138,8 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, struct gfs2_inum_host *inum) { struct gfs2_sbd *sdp = sb->s_fs_info; - struct gfs2_holder i_gh; struct inode *inode; struct dentry *dentry; - int error; inode = gfs2_ilookup(sb, inum->no_addr); if (inode) { @@ -152,52 +150,16 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, goto out_inode; } - error = gfs2_glock_nq_num(sdp, inum->no_addr, &gfs2_inode_glops, - LM_ST_SHARED, LM_FLAG_ANY, &i_gh); - if (error) - return ERR_PTR(error); - - error = gfs2_check_blk_type(sdp, inum->no_addr, GFS2_BLKST_DINODE); - if (error) - goto fail; - - inode = gfs2_inode_lookup(sb, DT_UNKNOWN, inum->no_addr, 0); - if (IS_ERR(inode)) { - error = PTR_ERR(inode); - goto fail; - } - - error = gfs2_inode_refresh(GFS2_I(inode)); - if (error) { - iput(inode); - goto fail; - } - - /* Pick up the works we bypass in gfs2_inode_lookup */ - if (inode->i_state & I_NEW) - gfs2_set_iop(inode); - - if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) { - iput(inode); - goto fail; - } - - error = -EIO; - if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) { - iput(inode); - goto fail; - } - - gfs2_glock_dq_uninit(&i_gh); + inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino, + GFS2_BLKST_DINODE); + if (IS_ERR(inode)) + return ERR_CAST(inode); out_inode: dentry = d_obtain_alias(inode); if (!IS_ERR(dentry)) - dentry->d_op = &gfs2_dops; + d_set_d_op(dentry, &gfs2_dops); return dentry; -fail: - gfs2_glock_dq_uninit(&i_gh); - return ERR_PTR(error); } static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid, diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index aa99647..fca6689 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -241,7 +241,7 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask) !capable(CAP_LINUX_IMMUTABLE)) goto out; if (!IS_IMMUTABLE(inode)) { - error = gfs2_permission(inode, MAY_WRITE); + error = gfs2_permission(inode, MAY_WRITE, 0); if (error) goto out; } diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 8777885..08a8beb 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -541,21 +541,6 @@ out_locked: spin_unlock(&gl->gl_spin); } -static unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock, - unsigned int req_state, - unsigned int flags) -{ - int ret = LM_OUT_ERROR; - - if (!sdp->sd_lockstruct.ls_ops->lm_lock) - return req_state == LM_ST_UNLOCKED ? 0 : req_state; - - if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) - ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock, - req_state, flags); - return ret; -} - /** * do_xmote - Calls the DLM to change the state of a lock * @gl: The lock state @@ -575,13 +560,14 @@ __acquires(&gl->gl_spin) lck_flags &= (LM_FLAG_TRY | LM_FLAG_TRY_1CB | LM_FLAG_NOEXP | LM_FLAG_PRIORITY); - BUG_ON(gl->gl_state == target); - BUG_ON(gl->gl_state == gl->gl_target); + GLOCK_BUG_ON(gl, gl->gl_state == target); + GLOCK_BUG_ON(gl, gl->gl_state == gl->gl_target); if ((target == LM_ST_UNLOCKED || target == LM_ST_DEFERRED) && glops->go_inval) { set_bit(GLF_INVALIDATE_IN_PROGRESS, &gl->gl_flags); do_error(gl, 0); /* Fail queued try locks */ } + gl->gl_req = target; spin_unlock(&gl->gl_spin); if (glops->go_xmote_th) glops->go_xmote_th(gl); @@ -594,15 +580,17 @@ __acquires(&gl->gl_spin) gl->gl_state == LM_ST_DEFERRED) && !(lck_flags & (LM_FLAG_TRY | LM_FLAG_TRY_1CB))) lck_flags |= LM_FLAG_TRY_1CB; - ret = gfs2_lm_lock(sdp, gl, target, lck_flags); - if (!(ret & LM_OUT_ASYNC)) { - finish_xmote(gl, ret); + if (sdp->sd_lockstruct.ls_ops->lm_lock) { + /* lock_dlm */ + ret = sdp->sd_lockstruct.ls_ops->lm_lock(gl, target, lck_flags); + GLOCK_BUG_ON(gl, ret); + } else { /* lock_nolock */ + finish_xmote(gl, target); if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0) gfs2_glock_put(gl); - } else { - GLOCK_BUG_ON(gl, ret != LM_OUT_ASYNC); } + spin_lock(&gl->gl_spin); } @@ -686,21 +674,20 @@ static void delete_work_func(struct work_struct *work) { struct gfs2_glock *gl = container_of(work, struct gfs2_glock, gl_delete); struct gfs2_sbd *sdp = gl->gl_sbd; - struct gfs2_inode *ip = NULL; + struct gfs2_inode *ip; struct inode *inode; - u64 no_addr = 0; + u64 no_addr = gl->gl_name.ln_number; + + ip = gl->gl_object; + /* Note: Unsafe to dereference ip as we don't hold right refs/locks */ - spin_lock(&gl->gl_spin); - ip = (struct gfs2_inode *)gl->gl_object; if (ip) - no_addr = ip->i_no_addr; - spin_unlock(&gl->gl_spin); - if (ip) { inode = gfs2_ilookup(sdp->sd_vfs, no_addr); - if (inode) { - d_prune_aliases(inode); - iput(inode); - } + else + inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED); + if (inode && !IS_ERR(inode)) { + d_prune_aliases(inode); + iput(inode); } gfs2_glock_put(gl); } @@ -952,17 +939,22 @@ int gfs2_glock_wait(struct gfs2_holder *gh) void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); + if (seq) { struct gfs2_glock_iter *gi = seq->private; vsprintf(gi->string, fmt, args); seq_printf(seq, gi->string); } else { - printk(KERN_ERR " "); - vprintk(fmt, args); + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_ERR " %pV", &vaf); } + va_end(args); } @@ -1362,24 +1354,28 @@ static int gfs2_should_freeze(const struct gfs2_glock *gl) * @gl: Pointer to the glock * @ret: The return value from the dlm * + * The gl_reply field is under the gl_spin lock so that it is ok + * to use a bitfield shared with other glock state fields. */ void gfs2_glock_complete(struct gfs2_glock *gl, int ret) { struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct; + spin_lock(&gl->gl_spin); gl->gl_reply = ret; if (unlikely(test_bit(DFL_BLOCK_LOCKS, &ls->ls_flags))) { - spin_lock(&gl->gl_spin); if (gfs2_should_freeze(gl)) { set_bit(GLF_FROZEN, &gl->gl_flags); spin_unlock(&gl->gl_spin); return; } - spin_unlock(&gl->gl_spin); } + + spin_unlock(&gl->gl_spin); set_bit(GLF_REPLY_PENDING, &gl->gl_flags); + smp_wmb(); gfs2_glock_hold(gl); if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0) gfs2_glock_put(gl); @@ -1627,18 +1623,17 @@ static const char *hflags2str(char *buf, unsigned flags, unsigned long iflags) static int dump_holder(struct seq_file *seq, const struct gfs2_holder *gh) { struct task_struct *gh_owner = NULL; - char buffer[KSYM_SYMBOL_LEN]; char flags_buf[32]; - sprint_symbol(buffer, gh->gh_ip); if (gh->gh_owner_pid) gh_owner = pid_task(gh->gh_owner_pid, PIDTYPE_PID); - gfs2_print_dbg(seq, " H: s:%s f:%s e:%d p:%ld [%s] %s\n", - state2str(gh->gh_state), - hflags2str(flags_buf, gh->gh_flags, gh->gh_iflags), - gh->gh_error, - gh->gh_owner_pid ? (long)pid_nr(gh->gh_owner_pid) : -1, - gh_owner ? gh_owner->comm : "(ended)", buffer); + gfs2_print_dbg(seq, " H: s:%s f:%s e:%d p:%ld [%s] %pS\n", + state2str(gh->gh_state), + hflags2str(flags_buf, gh->gh_flags, gh->gh_iflags), + gh->gh_error, + gh->gh_owner_pid ? (long)pid_nr(gh->gh_owner_pid) : -1, + gh_owner ? gh_owner->comm : "(ended)", + (void *)gh->gh_ip); return 0; } @@ -1783,12 +1778,13 @@ int __init gfs2_glock_init(void) } #endif - glock_workqueue = alloc_workqueue("glock_workqueue", WQ_RESCUER | + glock_workqueue = alloc_workqueue("glock_workqueue", WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_FREEZEABLE, 0); if (IS_ERR(glock_workqueue)) return PTR_ERR(glock_workqueue); - gfs2_delete_workqueue = alloc_workqueue("delete_workqueue", WQ_RESCUER | - WQ_FREEZEABLE, 0); + gfs2_delete_workqueue = alloc_workqueue("delete_workqueue", + WQ_MEM_RECLAIM | WQ_FREEZEABLE, + 0); if (IS_ERR(gfs2_delete_workqueue)) { destroy_workqueue(glock_workqueue); return PTR_ERR(gfs2_delete_workqueue); diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h index db1c26d..691851c 100644 --- a/fs/gfs2/glock.h +++ b/fs/gfs2/glock.h @@ -87,11 +87,10 @@ enum { #define GL_ASYNC 0x00000040 #define GL_EXACT 0x00000080 #define GL_SKIP 0x00000100 -#define GL_ATIME 0x00000200 #define GL_NOCACHE 0x00000400 /* - * lm_lock() and lm_async_cb return flags + * lm_async_cb return flags * * LM_OUT_ST_MASK * Masks the lower two bits of lock state in the returned value. @@ -99,15 +98,11 @@ enum { * LM_OUT_CANCELED * The lock request was canceled. * - * LM_OUT_ASYNC - * The result of the request will be returned in an LM_CB_ASYNC callback. - * */ #define LM_OUT_ST_MASK 0x00000003 #define LM_OUT_CANCELED 0x00000008 -#define LM_OUT_ASYNC 0x00000080 -#define LM_OUT_ERROR 0x00000100 +#define LM_OUT_ERROR 0x00000004 /* * lm_recovery_done() messages @@ -124,25 +119,12 @@ struct lm_lockops { void (*lm_unmount) (struct gfs2_sbd *sdp); void (*lm_withdraw) (struct gfs2_sbd *sdp); void (*lm_put_lock) (struct kmem_cache *cachep, struct gfs2_glock *gl); - unsigned int (*lm_lock) (struct gfs2_glock *gl, - unsigned int req_state, unsigned int flags); + int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state, + unsigned int flags); void (*lm_cancel) (struct gfs2_glock *gl); const match_table_t *lm_tokens; }; -#define LM_FLAG_TRY 0x00000001 -#define LM_FLAG_TRY_1CB 0x00000002 -#define LM_FLAG_NOEXP 0x00000004 -#define LM_FLAG_ANY 0x00000008 -#define LM_FLAG_PRIORITY 0x00000010 - -#define GL_ASYNC 0x00000040 -#define GL_EXACT 0x00000080 -#define GL_SKIP 0x00000100 -#define GL_NOCACHE 0x00000400 - -#define GLR_TRYFAILED 13 - extern struct workqueue_struct *gfs2_delete_workqueue; static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl) { @@ -212,6 +194,8 @@ int gfs2_glock_nq_num(struct gfs2_sbd *sdp, int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs); + +__attribute__ ((format(printf, 2, 3))) void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...); /** diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index 0d149dc..263561b 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -325,7 +325,6 @@ static void trans_go_sync(struct gfs2_glock *gl) if (gl->gl_state != LM_ST_UNLOCKED && test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { - flush_workqueue(gfs2_delete_workqueue); gfs2_meta_syncfs(sdp); gfs2_log_shutdown(sdp); } diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h index 764fbb4..a79790c 100644 --- a/fs/gfs2/incore.h +++ b/fs/gfs2/incore.h @@ -11,6 +11,7 @@ #define __INCORE_DOT_H__ #include <linux/fs.h> +#include <linux/kobject.h> #include <linux/workqueue.h> #include <linux/dlm.h> #include <linux/buffer_head.h> @@ -207,12 +208,14 @@ struct gfs2_glock { spinlock_t gl_spin; - unsigned int gl_state; - unsigned int gl_target; - unsigned int gl_reply; + /* State fields protected by gl_spin */ + unsigned int gl_state:2, /* Current state */ + gl_target:2, /* Target state */ + gl_demote_state:2, /* State requested by remote node */ + gl_req:2, /* State in last dlm request */ + gl_reply:8; /* Last reply from the dlm */ + unsigned int gl_hash; - unsigned int gl_req; - unsigned int gl_demote_state; /* state requested by remote node */ unsigned long gl_demote_time; /* time of first demote request */ struct list_head gl_holders; diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index 06370f8..2232b3c 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -73,49 +73,6 @@ static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); } -struct gfs2_skip_data { - u64 no_addr; - int skipped; -}; - -static int iget_skip_test(struct inode *inode, void *opaque) -{ - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_skip_data *data = opaque; - - if (ip->i_no_addr == data->no_addr) { - if (inode->i_state & (I_FREEING|I_WILL_FREE)){ - data->skipped = 1; - return 0; - } - return 1; - } - return 0; -} - -static int iget_skip_set(struct inode *inode, void *opaque) -{ - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_skip_data *data = opaque; - - if (data->skipped) - return 1; - inode->i_ino = (unsigned long)(data->no_addr); - ip->i_no_addr = data->no_addr; - return 0; -} - -static struct inode *gfs2_iget_skip(struct super_block *sb, - u64 no_addr) -{ - struct gfs2_skip_data data; - unsigned long hash = (unsigned long)no_addr; - - data.no_addr = no_addr; - data.skipped = 0; - return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); -} - /** * GFS2 lookup code fills in vfs inode contents based on info obtained * from directory entry inside gfs2_inode_lookup(). This has caused issues @@ -243,93 +200,54 @@ fail: return ERR_PTR(error); } -/** - * gfs2_process_unlinked_inode - Lookup an unlinked inode for reclamation - * and try to reclaim it by doing iput. - * - * This function assumes no rgrp locks are currently held. - * - * @sb: The super block - * no_addr: The inode number - * - */ - -void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr) +struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, + u64 *no_formal_ino, unsigned int blktype) { - struct gfs2_sbd *sdp; - struct gfs2_inode *ip; - struct gfs2_glock *io_gl = NULL; - int error; - struct gfs2_holder gh; + struct super_block *sb = sdp->sd_vfs; + struct gfs2_holder i_gh; struct inode *inode; + int error; - inode = gfs2_iget_skip(sb, no_addr); - - if (!inode) - return; - - /* If it's not a new inode, someone's using it, so leave it alone. */ - if (!(inode->i_state & I_NEW)) { - iput(inode); - return; - } - - ip = GFS2_I(inode); - sdp = GFS2_SB(inode); - ip->i_no_formal_ino = -1; + error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, + LM_ST_SHARED, LM_FLAG_ANY, &i_gh); + if (error) + return ERR_PTR(error); - error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); - if (unlikely(error)) + error = gfs2_check_blk_type(sdp, no_addr, blktype); + if (error) goto fail; - ip->i_gl->gl_object = ip; - - error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); - if (unlikely(error)) - goto fail_put; - set_bit(GIF_INVALID, &ip->i_flags); - error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, LM_FLAG_TRY | GL_EXACT, - &ip->i_iopen_gh); - if (unlikely(error)) - goto fail_iopen; + inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0); + if (IS_ERR(inode)) + goto fail; - ip->i_iopen_gh.gh_gl->gl_object = ip; - gfs2_glock_put(io_gl); - io_gl = NULL; + error = gfs2_inode_refresh(GFS2_I(inode)); + if (error) + goto fail_iput; - inode->i_mode = DT2IF(DT_UNKNOWN); + /* Pick up the works we bypass in gfs2_inode_lookup */ + if (inode->i_state & I_NEW) + gfs2_set_iop(inode); - /* - * We must read the inode in order to work out its type in - * this case. Note that this doesn't happen often as we normally - * know the type beforehand. This code path only occurs during - * unlinked inode recovery (where it is safe to do this glock, - * which is not true in the general case). - */ - error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_TRY, - &gh); - if (unlikely(error)) - goto fail_glock; + /* Two extra checks for NFS only */ + if (no_formal_ino) { + error = -ESTALE; + if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) + goto fail_iput; - /* Inode is now uptodate */ - gfs2_glock_dq_uninit(&gh); - gfs2_set_iop(inode); + error = -EIO; + if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) + goto fail_iput; - /* The iput will cause it to be deleted. */ - iput(inode); - return; + error = 0; + } -fail_glock: - gfs2_glock_dq(&ip->i_iopen_gh); -fail_iopen: - if (io_gl) - gfs2_glock_put(io_gl); -fail_put: - ip->i_gl->gl_object = NULL; - gfs2_glock_put(ip->i_gl); fail: - iget_failed(inode); - return; + gfs2_glock_dq_uninit(&i_gh); + return error ? ERR_PTR(error) : inode; +fail_iput: + iput(inode); + goto fail; } static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) @@ -591,7 +509,7 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, } if (!is_root) { - error = gfs2_permission(dir, MAY_EXEC); + error = gfs2_permission(dir, MAY_EXEC, 0); if (error) goto out; } @@ -621,7 +539,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name, { int error; - error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); + error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0); if (error) return error; @@ -998,17 +916,8 @@ static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) if (error) return error; - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - error = vmtruncate(inode, attr->ia_size); - if (error) - return error; - } - setattr_copy(inode, attr); mark_inode_dirty(inode); - - gfs2_assert_warn(GFS2_SB(inode), !error); gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); brelse(dibh); diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h index 6720d7d..732a183 100644 --- a/fs/gfs2/inode.h +++ b/fs/gfs2/inode.h @@ -99,7 +99,9 @@ err: extern void gfs2_set_iop(struct inode *inode); extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, u64 no_addr, u64 no_formal_ino); -extern void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr); +extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, + u64 *no_formal_ino, + unsigned int blktype); extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr); extern int gfs2_inode_refresh(struct gfs2_inode *ip); @@ -111,7 +113,7 @@ extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, extern struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, unsigned int mode, dev_t dev); -extern int gfs2_permission(struct inode *inode, int mask); +extern int gfs2_permission(struct inode *inode, int mask, unsigned int flags); extern int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr); extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name); extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf); diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c index 1c09425..6e493ae 100644 --- a/fs/gfs2/lock_dlm.c +++ b/fs/gfs2/lock_dlm.c @@ -146,15 +146,13 @@ static u32 make_flags(const u32 lkid, const unsigned int gfs_flags, return lkf; } -static unsigned int gdlm_lock(struct gfs2_glock *gl, - unsigned int req_state, unsigned int flags) +static int gdlm_lock(struct gfs2_glock *gl, unsigned int req_state, + unsigned int flags) { struct lm_lockstruct *ls = &gl->gl_sbd->sd_lockstruct; - int error; int req; u32 lkf; - gl->gl_req = req_state; req = make_mode(req_state); lkf = make_flags(gl->gl_lksb.sb_lkid, flags, req); @@ -162,13 +160,8 @@ static unsigned int gdlm_lock(struct gfs2_glock *gl, * Submit the actual lock request. */ - error = dlm_lock(ls->ls_dlm, req, &gl->gl_lksb, lkf, gl->gl_strname, - GDLM_STRNAME_BYTES - 1, 0, gdlm_ast, gl, gdlm_bast); - if (error == -EAGAIN) - return 0; - if (error) - return LM_OUT_ERROR; - return LM_OUT_ASYNC; + return dlm_lock(ls->ls_dlm, req, &gl->gl_lksb, lkf, gl->gl_strname, + GDLM_STRNAME_BYTES - 1, 0, gdlm_ast, gl, gdlm_bast); } static void gdlm_put_lock(struct kmem_cache *cachep, struct gfs2_glock *gl) diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c index cade1ac..2aeabd4 100644 --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -440,7 +440,7 @@ static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, iput(inode); return -ENOMEM; } - dentry->d_op = &gfs2_dops; + d_set_d_op(dentry, &gfs2_dops); *dptr = dentry; return 0; } @@ -1250,12 +1250,11 @@ static int test_gfs2_super(struct super_block *s, void *ptr) } /** - * gfs2_get_sb - Get the GFS2 superblock + * gfs2_mount - Get the GFS2 superblock * @fs_type: The GFS2 filesystem type * @flags: Mount flags * @dev_name: The name of the device * @data: The mount arguments - * @mnt: The vfsmnt for this mount * * Q. Why not use get_sb_bdev() ? * A. We need to select one of two root directories to mount, independent @@ -1264,8 +1263,8 @@ static int test_gfs2_super(struct super_block *s, void *ptr) * Returns: 0 or -ve on error */ -static int gfs2_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { struct block_device *bdev; struct super_block *s; @@ -1279,7 +1278,7 @@ static int gfs2_get_sb(struct file_system_type *fs_type, int flags, bdev = open_bdev_exclusive(dev_name, mode, fs_type); if (IS_ERR(bdev)) - return PTR_ERR(bdev); + return ERR_CAST(bdev); /* * once the super is inserted into the list by sget, s_umount @@ -1298,6 +1297,9 @@ static int gfs2_get_sb(struct file_system_type *fs_type, int flags, if (IS_ERR(s)) goto error_bdev; + if (s->s_root) + close_bdev_exclusive(bdev, mode); + memset(&args, 0, sizeof(args)); args.ar_quota = GFS2_QUOTA_DEFAULT; args.ar_data = GFS2_DATA_DEFAULT; @@ -1309,17 +1311,13 @@ static int gfs2_get_sb(struct file_system_type *fs_type, int flags, error = gfs2_mount_args(&args, data); if (error) { printk(KERN_WARNING "GFS2: can't parse mount arguments\n"); - if (s->s_root) - goto error_super; - deactivate_locked_super(s); - return error; + goto error_super; } if (s->s_root) { error = -EBUSY; if ((flags ^ s->s_flags) & MS_RDONLY) goto error_super; - close_bdev_exclusive(bdev, mode); } else { char b[BDEVNAME_SIZE]; @@ -1328,27 +1326,24 @@ static int gfs2_get_sb(struct file_system_type *fs_type, int flags, strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id)); sb_set_blocksize(s, block_size(bdev)); error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0); - if (error) { - deactivate_locked_super(s); - return error; - } + if (error) + goto error_super; s->s_flags |= MS_ACTIVE; bdev->bd_super = s; } sdp = s->s_fs_info; - mnt->mnt_sb = s; if (args.ar_meta) - mnt->mnt_root = dget(sdp->sd_master_dir); + return dget(sdp->sd_master_dir); else - mnt->mnt_root = dget(sdp->sd_root_dir); - return 0; + return dget(sdp->sd_root_dir); error_super: deactivate_locked_super(s); + return ERR_PTR(error); error_bdev: close_bdev_exclusive(bdev, mode); - return error; + return ERR_PTR(error); } static int set_meta_super(struct super_block *s, void *ptr) @@ -1356,8 +1351,8 @@ static int set_meta_super(struct super_block *s, void *ptr) return -EINVAL; } -static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { struct super_block *s; struct gfs2_sbd *sdp; @@ -1368,23 +1363,21 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags, if (error) { printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n", dev_name, error); - return error; + return ERR_PTR(error); } s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, path.dentry->d_inode->i_sb->s_bdev); path_put(&path); if (IS_ERR(s)) { printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n"); - return PTR_ERR(s); + return ERR_CAST(s); } if ((flags ^ s->s_flags) & MS_RDONLY) { deactivate_locked_super(s); - return -EBUSY; + return ERR_PTR(-EBUSY); } sdp = s->s_fs_info; - mnt->mnt_sb = s; - mnt->mnt_root = dget(sdp->sd_master_dir); - return 0; + return dget(sdp->sd_master_dir); } static void gfs2_kill_sb(struct super_block *sb) @@ -1410,7 +1403,7 @@ static void gfs2_kill_sb(struct super_block *sb) struct file_system_type gfs2_fs_type = { .name = "gfs2", .fs_flags = FS_REQUIRES_DEV, - .get_sb = gfs2_get_sb, + .mount = gfs2_mount, .kill_sb = gfs2_kill_sb, .owner = THIS_MODULE, }; @@ -1418,7 +1411,7 @@ struct file_system_type gfs2_fs_type = { struct file_system_type gfs2meta_fs_type = { .name = "gfs2meta", .fs_flags = FS_REQUIRES_DEV, - .get_sb = gfs2_get_sb_meta, + .mount = gfs2_mount_meta, .owner = THIS_MODULE, }; diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 12cbea7..1501db4 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -106,7 +106,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, { struct inode *inode = NULL; - dentry->d_op = &gfs2_dops; + d_set_d_op(dentry, &gfs2_dops); inode = gfs2_lookupi(dir, &dentry->d_name, 0); if (inode && IS_ERR(inode)) @@ -166,7 +166,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir, if (error) goto out_child; - error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); + error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC, 0); if (error) goto out_gunlock; @@ -289,7 +289,7 @@ static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, if (IS_APPEND(&dip->i_inode)) return -EPERM; - error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); + error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, 0); if (error) return error; @@ -822,7 +822,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, } } } else { - error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); + error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC, 0); if (error) goto out_gunlock; @@ -857,7 +857,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, /* Check out the dir to be renamed */ if (dir_rename) { - error = gfs2_permission(odentry->d_inode, MAY_WRITE); + error = gfs2_permission(odentry->d_inode, MAY_WRITE, 0); if (error) goto out_gunlock; } @@ -1041,13 +1041,17 @@ static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) * Returns: errno */ -int gfs2_permission(struct inode *inode, int mask) +int gfs2_permission(struct inode *inode, int mask, unsigned int flags) { - struct gfs2_inode *ip = GFS2_I(inode); + struct gfs2_inode *ip; struct gfs2_holder i_gh; int error; int unlock = 0; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + + ip = GFS2_I(inode); if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); if (error) @@ -1058,7 +1062,7 @@ int gfs2_permission(struct inode *inode, int mask) if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) error = -EACCES; else - error = generic_permission(inode, mask, gfs2_check_acl); + error = generic_permission(inode, mask, flags, gfs2_check_acl); if (unlock) gfs2_glock_dq_uninit(&i_gh); @@ -1069,7 +1073,6 @@ static int setattr_chown(struct inode *inode, struct iattr *attr) { struct gfs2_inode *ip = GFS2_I(inode); struct gfs2_sbd *sdp = GFS2_SB(inode); - struct buffer_head *dibh; u32 ouid, ogid, nuid, ngid; int error; @@ -1100,25 +1103,10 @@ static int setattr_chown(struct inode *inode, struct iattr *attr) if (error) goto out_gunlock_q; - error = gfs2_meta_inode_buffer(ip, &dibh); + error = gfs2_setattr_simple(ip, attr); if (error) goto out_end_trans; - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - int error; - - error = vmtruncate(inode, attr->ia_size); - gfs2_assert_warn(sdp, !error); - } - - setattr_copy(inode, attr); - mark_inode_dirty(inode); - - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); gfs2_quota_change(ip, -blocks, ouid, ogid); diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 58a9b99..a689901 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -631,6 +631,7 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, struct fs_disk_quota *fdq) { struct inode *inode = &ip->i_inode; + struct gfs2_sbd *sdp = GFS2_SB(inode); struct address_space *mapping = inode->i_mapping; unsigned long index = loc >> PAGE_CACHE_SHIFT; unsigned offset = loc & (PAGE_CACHE_SIZE - 1); @@ -658,13 +659,17 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc, qd->qd_qb.qb_value = qp->qu_value; if (fdq) { if (fdq->d_fieldmask & FS_DQ_BSOFT) { - qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit); + qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift); qd->qd_qb.qb_warn = qp->qu_warn; } if (fdq->d_fieldmask & FS_DQ_BHARD) { - qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit); + qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift); qd->qd_qb.qb_limit = qp->qu_limit; } + if (fdq->d_fieldmask & FS_DQ_BCOUNT) { + qp->qu_value = cpu_to_be64(fdq->d_bcount >> sdp->sd_fsb2bb_shift); + qd->qd_qb.qb_value = qp->qu_value; + } } /* Write the quota into the quota file on disk */ @@ -1497,9 +1502,9 @@ static int gfs2_get_dqblk(struct super_block *sb, int type, qid_t id, fdq->d_version = FS_DQUOT_VERSION; fdq->d_flags = (type == QUOTA_USER) ? FS_USER_QUOTA : FS_GROUP_QUOTA; fdq->d_id = id; - fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit); - fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn); - fdq->d_bcount = be64_to_cpu(qlvb->qb_value); + fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_fsb2bb_shift; + fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_fsb2bb_shift; + fdq->d_bcount = be64_to_cpu(qlvb->qb_value) << sdp->sd_fsb2bb_shift; gfs2_glock_dq_uninit(&q_gh); out: @@ -1508,7 +1513,7 @@ out: } /* GFS2 only supports a subset of the XFS fields */ -#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD) +#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD|FS_DQ_BCOUNT) static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, struct fs_disk_quota *fdq) @@ -1566,11 +1571,17 @@ static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id, /* If nothing has changed, this is a no-op */ if ((fdq->d_fieldmask & FS_DQ_BSOFT) && - (fdq->d_blk_softlimit == be64_to_cpu(qd->qd_qb.qb_warn))) + ((fdq->d_blk_softlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_warn))) fdq->d_fieldmask ^= FS_DQ_BSOFT; + if ((fdq->d_fieldmask & FS_DQ_BHARD) && - (fdq->d_blk_hardlimit == be64_to_cpu(qd->qd_qb.qb_limit))) + ((fdq->d_blk_hardlimit >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_limit))) fdq->d_fieldmask ^= FS_DQ_BHARD; + + if ((fdq->d_fieldmask & FS_DQ_BCOUNT) && + ((fdq->d_bcount >> sdp->sd_fsb2bb_shift) == be64_to_cpu(qd->qd_qb.qb_value))) + fdq->d_fieldmask ^= FS_DQ_BCOUNT; + if (fdq->d_fieldmask == 0) goto out_i; @@ -1619,4 +1630,3 @@ const struct quotactl_ops gfs2_quotactl_ops = { .get_dqblk = gfs2_get_dqblk, .set_dqblk = gfs2_set_dqblk, }; - diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index bef3ab6..7293ea2 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -500,7 +500,7 @@ u64 gfs2_ri_total(struct gfs2_sbd *sdp) for (rgrps = 0;; rgrps++) { loff_t pos = rgrps * sizeof(struct gfs2_rindex); - if (pos + sizeof(struct gfs2_rindex) >= i_size_read(inode)) + if (pos + sizeof(struct gfs2_rindex) > i_size_read(inode)) break; error = gfs2_internal_read(ip, &ra_state, buf, &pos, sizeof(struct gfs2_rindex)); @@ -583,7 +583,7 @@ static int read_rindex_entry(struct gfs2_inode *ip, * Returns: 0 on successful update, error code otherwise */ -static int gfs2_ri_update(struct gfs2_inode *ip) +int gfs2_ri_update(struct gfs2_inode *ip) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct inode *inode = &ip->i_inode; @@ -614,46 +614,6 @@ static int gfs2_ri_update(struct gfs2_inode *ip) } /** - * gfs2_ri_update_special - Pull in a new resource index from the disk - * - * This is a special version that's safe to call from gfs2_inplace_reserve_i. - * In this case we know that we don't have any resource groups in memory yet. - * - * @ip: pointer to the rindex inode - * - * Returns: 0 on successful update, error code otherwise - */ -static int gfs2_ri_update_special(struct gfs2_inode *ip) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct inode *inode = &ip->i_inode; - struct file_ra_state ra_state; - struct gfs2_rgrpd *rgd; - unsigned int max_data = 0; - int error; - - file_ra_state_init(&ra_state, inode->i_mapping); - for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) { - /* Ignore partials */ - if ((sdp->sd_rgrps + 1) * sizeof(struct gfs2_rindex) > - i_size_read(inode)) - break; - error = read_rindex_entry(ip, &ra_state); - if (error) { - clear_rgrpdi(sdp); - return error; - } - } - list_for_each_entry(rgd, &sdp->sd_rindex_list, rd_list) - if (rgd->rd_data > max_data) - max_data = rgd->rd_data; - sdp->sd_max_rg_data = max_data; - - sdp->sd_rindex_uptodate = 1; - return 0; -} - -/** * gfs2_rindex_hold - Grab a lock on the rindex * @sdp: The GFS2 superblock * @ri_gh: the glock holder @@ -963,17 +923,18 @@ static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al) * The inode, if one has been found, in inode. */ -static u64 try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, - u64 skip) +static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip) { u32 goal = 0, block; u64 no_addr; struct gfs2_sbd *sdp = rgd->rd_sbd; unsigned int n; + struct gfs2_glock *gl; + struct gfs2_inode *ip; + int error; + int found = 0; - for(;;) { - if (goal >= rgd->rd_data) - break; + while (goal < rgd->rd_data) { down_write(&sdp->sd_log_flush_lock); n = 1; block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED, @@ -990,11 +951,32 @@ static u64 try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, if (no_addr == skip) continue; *last_unlinked = no_addr; - return no_addr; + + error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &gl); + if (error) + continue; + + /* If the inode is already in cache, we can ignore it here + * because the existing inode disposal code will deal with + * it when all refs have gone away. Accessing gl_object like + * this is not safe in general. Here it is ok because we do + * not dereference the pointer, and we only need an approx + * answer to whether it is NULL or not. + */ + ip = gl->gl_object; + + if (ip || queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) + gfs2_glock_put(gl); + else + found++; + + /* Limit reclaim to sensible number of tasks */ + if (found > 2*NR_CPUS) + return; } rgd->rd_flags &= ~GFS2_RDF_CHECK; - return 0; + return; } /** @@ -1075,11 +1057,9 @@ static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd) * Try to acquire rgrp in way which avoids contending with others. * * Returns: errno - * unlinked: the block address of an unlinked block to be reclaimed */ -static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, - u64 *last_unlinked) +static int get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked) { struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_rgrpd *rgd, *begin = NULL; @@ -1089,7 +1069,6 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, int loops = 0; int error, rg_locked; - *unlinked = 0; rgd = gfs2_blk2rgrpd(sdp, ip->i_goal); while (rgd) { @@ -1106,17 +1085,10 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, case 0: if (try_rgrp_fit(rgd, al)) goto out; - /* If the rg came in already locked, there's no - way we can recover from a failed try_rgrp_unlink - because that would require an iput which can only - happen after the rgrp is unlocked. */ - if (!rg_locked && rgd->rd_flags & GFS2_RDF_CHECK) - *unlinked = try_rgrp_unlink(rgd, last_unlinked, - ip->i_no_addr); + if (rgd->rd_flags & GFS2_RDF_CHECK) + try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr); if (!rg_locked) gfs2_glock_dq_uninit(&al->al_rgd_gh); - if (*unlinked) - return -EAGAIN; /* fall through */ case GLR_TRYFAILED: rgd = recent_rgrp_next(rgd); @@ -1145,13 +1117,10 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, case 0: if (try_rgrp_fit(rgd, al)) goto out; - if (!rg_locked && rgd->rd_flags & GFS2_RDF_CHECK) - *unlinked = try_rgrp_unlink(rgd, last_unlinked, - ip->i_no_addr); + if (rgd->rd_flags & GFS2_RDF_CHECK) + try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr); if (!rg_locked) gfs2_glock_dq_uninit(&al->al_rgd_gh); - if (*unlinked) - return -EAGAIN; break; case GLR_TRYFAILED: @@ -1204,12 +1173,12 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex, struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_alloc *al = ip->i_alloc; int error = 0; - u64 last_unlinked = NO_BLOCK, unlinked; + u64 last_unlinked = NO_BLOCK; + int tries = 0; if (gfs2_assert_warn(sdp, al->al_requested)) return -EINVAL; -try_again: if (hold_rindex) { /* We need to hold the rindex unless the inode we're using is the rindex itself, in which case it's already held. */ @@ -1217,32 +1186,33 @@ try_again: error = gfs2_rindex_hold(sdp, &al->al_ri_gh); else if (!sdp->sd_rgrps) /* We may not have the rindex read in, so: */ - error = gfs2_ri_update_special(ip); + error = gfs2_ri_update(ip); + if (error) + return error; } - if (error) - return error; +try_again: + do { + error = get_local_rgrp(ip, &last_unlinked); + /* If there is no space, flushing the log may release some */ + if (error) { + if (ip == GFS2_I(sdp->sd_rindex) && + !sdp->sd_rindex_uptodate) { + error = gfs2_ri_update(ip); + if (error) + return error; + goto try_again; + } + gfs2_log_flush(sdp, NULL); + } + } while (error && tries++ < 3); - /* Find an rgrp suitable for allocation. If it encounters any unlinked - dinodes along the way, error will equal -EAGAIN and unlinked will - contains it block address. We then need to look up that inode and - try to free it, and try the allocation again. */ - error = get_local_rgrp(ip, &unlinked, &last_unlinked); if (error) { if (hold_rindex && ip != GFS2_I(sdp->sd_rindex)) gfs2_glock_dq_uninit(&al->al_ri_gh); - if (error != -EAGAIN) - return error; - - gfs2_process_unlinked_inode(ip->i_inode.i_sb, unlinked); - /* regardless of whether or not gfs2_process_unlinked_inode - was successful, we don't want to repeat it again. */ - last_unlinked = unlinked; - gfs2_log_flush(sdp, NULL); - error = 0; - - goto try_again; + return error; } + /* no error, so we have the rgrp set in the inode's allocation. */ al->al_file = file; al->al_line = line; diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h index 0e35c04..50c2bb0 100644 --- a/fs/gfs2/rgrp.h +++ b/fs/gfs2/rgrp.h @@ -48,6 +48,7 @@ extern int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex, extern void gfs2_inplace_release(struct gfs2_inode *ip); +extern int gfs2_ri_update(struct gfs2_inode *ip); extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n); extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation); diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 2b2c499..16c2eca 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1405,11 +1405,18 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb) return &ip->i_inode; } -static void gfs2_destroy_inode(struct inode *inode) +static void gfs2_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(gfs2_inode_cachep, inode); } +static void gfs2_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, gfs2_i_callback); +} + const struct super_operations gfs2_super_ops = { .alloc_inode = gfs2_alloc_inode, .destroy_inode = gfs2_destroy_inode, diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c index 30b58f07..439b61c0 100644 --- a/fs/gfs2/xattr.c +++ b/fs/gfs2/xattr.c @@ -1296,10 +1296,8 @@ fail: int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data) { - struct inode *inode = &ip->i_inode; struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_ea_location el; - struct buffer_head *dibh; int error; error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el); @@ -1321,26 +1319,7 @@ int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data) if (error) return error; - error = gfs2_meta_inode_buffer(ip, &dibh); - if (error) - goto out_trans_end; - - if ((attr->ia_valid & ATTR_SIZE) && - attr->ia_size != i_size_read(inode)) { - int error; - - error = vmtruncate(inode, attr->ia_size); - gfs2_assert_warn(GFS2_SB(inode), !error); - } - - setattr_copy(inode, attr); - mark_inode_dirty(inode); - - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - -out_trans_end: + error = gfs2_setattr_simple(ip, attr); gfs2_trans_end(sdp); return error; } diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c index 2b3b861..ea4aefe 100644 --- a/fs/hfs/dir.c +++ b/fs/hfs/dir.c @@ -25,7 +25,7 @@ static struct dentry *hfs_lookup(struct inode *dir, struct dentry *dentry, struct inode *inode = NULL; int res; - dentry->d_op = &hfs_dentry_operations; + d_set_d_op(dentry, &hfs_dentry_operations); hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd); hfs_cat_build_key(dir->i_sb, fd.search_key, dir->i_ino, &dentry->d_name); diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h index c8cffb8..ad97c2d 100644 --- a/fs/hfs/hfs_fs.h +++ b/fs/hfs/hfs_fs.h @@ -213,10 +213,14 @@ extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); /* string.c */ extern const struct dentry_operations hfs_dentry_operations; -extern int hfs_hash_dentry(struct dentry *, struct qstr *); +extern int hfs_hash_dentry(const struct dentry *, const struct inode *, + struct qstr *); extern int hfs_strcmp(const unsigned char *, unsigned int, const unsigned char *, unsigned int); -extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *); +extern int hfs_compare_dentry(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); /* trans.c */ extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *); diff --git a/fs/hfs/string.c b/fs/hfs/string.c index 927a5af..495a976 100644 --- a/fs/hfs/string.c +++ b/fs/hfs/string.c @@ -51,7 +51,8 @@ static unsigned char caseorder[256] = { /* * Hash a string to an integer in a case-independent way */ -int hfs_hash_dentry(struct dentry *dentry, struct qstr *this) +int hfs_hash_dentry(const struct dentry *dentry, const struct inode *inode, + struct qstr *this) { const unsigned char *name = this->name; unsigned int hash, len = this->len; @@ -92,21 +93,21 @@ int hfs_strcmp(const unsigned char *s1, unsigned int len1, * Test for equality of two strings in the HFS filename character ordering. * return 1 on failure and 0 on success */ -int hfs_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2) +int hfs_compare_dentry(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { const unsigned char *n1, *n2; - int len; - len = s1->len; if (len >= HFS_NAMELEN) { - if (s2->len < HFS_NAMELEN) + if (name->len < HFS_NAMELEN) return 1; len = HFS_NAMELEN; - } else if (len != s2->len) + } else if (len != name->len) return 1; - n1 = s1->name; - n2 = s2->name; + n1 = str; + n2 = name->name; while (len--) { if (caseorder[*n1++] != caseorder[*n2++]) return 1; diff --git a/fs/hfs/super.c b/fs/hfs/super.c index 6ee1586..0bef62a 100644 --- a/fs/hfs/super.c +++ b/fs/hfs/super.c @@ -167,11 +167,18 @@ static struct inode *hfs_alloc_inode(struct super_block *sb) return i ? &i->vfs_inode : NULL; } -static void hfs_destroy_inode(struct inode *inode) +static void hfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(hfs_inode_cachep, HFS_I(inode)); } +static void hfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, hfs_i_callback); +} + static const struct super_operations hfs_super_operations = { .alloc_inode = hfs_alloc_inode, .destroy_inode = hfs_destroy_inode, @@ -427,7 +434,7 @@ static int hfs_fill_super(struct super_block *sb, void *data, int silent) if (!sb->s_root) goto bail_iput; - sb->s_root->d_op = &hfs_dentry_operations; + d_set_d_op(sb->s_root, &hfs_dentry_operations); /* everything's okay */ return 0; @@ -441,17 +448,16 @@ bail: return res; } -static int hfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *hfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, hfs_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super); } static struct file_system_type hfs_fs_type = { .owner = THIS_MODULE, .name = "hfs", - .get_sb = hfs_get_sb, + .mount = hfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/hfs/sysdep.c b/fs/hfs/sysdep.c index 7478f5c..19cf291 100644 --- a/fs/hfs/sysdep.c +++ b/fs/hfs/sysdep.c @@ -8,15 +8,20 @@ * This file contains the code to do various system dependent things. */ +#include <linux/namei.h> #include "hfs_fs.h" /* dentry case-handling: just lowercase everything */ static int hfs_revalidate_dentry(struct dentry *dentry, struct nameidata *nd) { - struct inode *inode = dentry->d_inode; + struct inode *inode; int diff; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = dentry->d_inode; if(!inode) return 1; diff --git a/fs/hfsplus/bfind.c b/fs/hfsplus/bfind.c index d182438..5d799c1 100644 --- a/fs/hfsplus/bfind.c +++ b/fs/hfsplus/bfind.c @@ -22,7 +22,8 @@ int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd) return -ENOMEM; fd->search_key = ptr; fd->key = ptr + tree->max_key_len + 2; - dprint(DBG_BNODE_REFS, "find_init: %d (%p)\n", tree->cnid, __builtin_return_address(0)); + dprint(DBG_BNODE_REFS, "find_init: %d (%p)\n", + tree->cnid, __builtin_return_address(0)); mutex_lock(&tree->tree_lock); return 0; } @@ -31,7 +32,8 @@ void hfs_find_exit(struct hfs_find_data *fd) { hfs_bnode_put(fd->bnode); kfree(fd->search_key); - dprint(DBG_BNODE_REFS, "find_exit: %d (%p)\n", fd->tree->cnid, __builtin_return_address(0)); + dprint(DBG_BNODE_REFS, "find_exit: %d (%p)\n", + fd->tree->cnid, __builtin_return_address(0)); mutex_unlock(&fd->tree->tree_lock); fd->tree = NULL; } diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c index ad57f59..1cad80c 100644 --- a/fs/hfsplus/bitmap.c +++ b/fs/hfsplus/bitmap.c @@ -15,7 +15,8 @@ #define PAGE_CACHE_BITS (PAGE_CACHE_SIZE * 8) -int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *max) +int hfsplus_block_allocate(struct super_block *sb, u32 size, + u32 offset, u32 *max) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); struct page *page; diff --git a/fs/hfsplus/bnode.c b/fs/hfsplus/bnode.c index 29da657..1c42cc5 100644 --- a/fs/hfsplus/bnode.c +++ b/fs/hfsplus/bnode.c @@ -42,7 +42,7 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len) u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off) { __be16 data; - // optimize later... + /* TODO: optimize later... */ hfs_bnode_read(node, &data, off, 2); return be16_to_cpu(data); } @@ -50,7 +50,7 @@ u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off) u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off) { u8 data; - // optimize later... + /* TODO: optimize later... */ hfs_bnode_read(node, &data, off, 1); return data; } @@ -96,7 +96,7 @@ void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len) void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data) { __be16 v = cpu_to_be16(data); - // optimize later... + /* TODO: optimize later... */ hfs_bnode_write(node, &v, off, 2); } @@ -212,7 +212,8 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) dst_page--; } src -= len; - memmove(kmap(*dst_page) + src, kmap(*src_page) + src, len); + memmove(kmap(*dst_page) + src, + kmap(*src_page) + src, len); kunmap(*src_page); set_page_dirty(*dst_page); kunmap(*dst_page); @@ -250,14 +251,16 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) if (src == dst) { l = min(len, (int)PAGE_CACHE_SIZE - src); - memmove(kmap(*dst_page) + src, kmap(*src_page) + src, l); + memmove(kmap(*dst_page) + src, + kmap(*src_page) + src, l); kunmap(*src_page); set_page_dirty(*dst_page); kunmap(*dst_page); while ((len -= l) != 0) { l = min(len, (int)PAGE_CACHE_SIZE); - memmove(kmap(*++dst_page), kmap(*++src_page), l); + memmove(kmap(*++dst_page), + kmap(*++src_page), l); kunmap(*src_page); set_page_dirty(*dst_page); kunmap(*dst_page); @@ -268,7 +271,8 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) do { src_ptr = kmap(*src_page) + src; dst_ptr = kmap(*dst_page) + dst; - if (PAGE_CACHE_SIZE - src < PAGE_CACHE_SIZE - dst) { + if (PAGE_CACHE_SIZE - src < + PAGE_CACHE_SIZE - dst) { l = PAGE_CACHE_SIZE - src; src = 0; dst += l; @@ -340,7 +344,8 @@ void hfs_bnode_unlink(struct hfs_bnode *node) return; tmp->next = node->next; cnid = cpu_to_be32(tmp->next); - hfs_bnode_write(tmp, &cnid, offsetof(struct hfs_bnode_desc, next), 4); + hfs_bnode_write(tmp, &cnid, + offsetof(struct hfs_bnode_desc, next), 4); hfs_bnode_put(tmp); } else if (node->type == HFS_NODE_LEAF) tree->leaf_head = node->next; @@ -351,15 +356,15 @@ void hfs_bnode_unlink(struct hfs_bnode *node) return; tmp->prev = node->prev; cnid = cpu_to_be32(tmp->prev); - hfs_bnode_write(tmp, &cnid, offsetof(struct hfs_bnode_desc, prev), 4); + hfs_bnode_write(tmp, &cnid, + offsetof(struct hfs_bnode_desc, prev), 4); hfs_bnode_put(tmp); } else if (node->type == HFS_NODE_LEAF) tree->leaf_tail = node->prev; - // move down? - if (!node->prev && !node->next) { - printk(KERN_DEBUG "hfs_btree_del_level\n"); - } + /* move down? */ + if (!node->prev && !node->next) + dprint(DBG_BNODE_MOD, "hfs_btree_del_level\n"); if (!node->parent) { tree->root = 0; tree->depth = 0; @@ -379,16 +384,16 @@ struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid) struct hfs_bnode *node; if (cnid >= tree->node_count) { - printk(KERN_ERR "hfs: request for non-existent node %d in B*Tree\n", cnid); + printk(KERN_ERR "hfs: request for non-existent node " + "%d in B*Tree\n", + cnid); return NULL; } for (node = tree->node_hash[hfs_bnode_hash(cnid)]; - node; node = node->next_hash) { - if (node->this == cnid) { + node; node = node->next_hash) + if (node->this == cnid) return node; - } - } return NULL; } @@ -402,7 +407,9 @@ static struct hfs_bnode *__hfs_bnode_create(struct hfs_btree *tree, u32 cnid) loff_t off; if (cnid >= tree->node_count) { - printk(KERN_ERR "hfs: request for non-existent node %d in B*Tree\n", cnid); + printk(KERN_ERR "hfs: request for non-existent node " + "%d in B*Tree\n", + cnid); return NULL; } @@ -429,7 +436,8 @@ static struct hfs_bnode *__hfs_bnode_create(struct hfs_btree *tree, u32 cnid) } else { spin_unlock(&tree->hash_lock); kfree(node); - wait_event(node2->lock_wq, !test_bit(HFS_BNODE_NEW, &node2->flags)); + wait_event(node2->lock_wq, + !test_bit(HFS_BNODE_NEW, &node2->flags)); return node2; } spin_unlock(&tree->hash_lock); @@ -483,7 +491,8 @@ struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num) if (node) { hfs_bnode_get(node); spin_unlock(&tree->hash_lock); - wait_event(node->lock_wq, !test_bit(HFS_BNODE_NEW, &node->flags)); + wait_event(node->lock_wq, + !test_bit(HFS_BNODE_NEW, &node->flags)); if (test_bit(HFS_BNODE_ERROR, &node->flags)) goto node_error; return node; @@ -497,7 +506,8 @@ struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num) if (!test_bit(HFS_BNODE_NEW, &node->flags)) return node; - desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) + node->page_offset); + desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) + + node->page_offset); node->prev = be32_to_cpu(desc->prev); node->next = be32_to_cpu(desc->next); node->num_recs = be16_to_cpu(desc->num_recs); @@ -556,11 +566,13 @@ node_error: void hfs_bnode_free(struct hfs_bnode *node) { - //int i; +#if 0 + int i; - //for (i = 0; i < node->tree->pages_per_bnode; i++) - // if (node->page[i]) - // page_cache_release(node->page[i]); + for (i = 0; i < node->tree->pages_per_bnode; i++) + if (node->page[i]) + page_cache_release(node->page[i]); +#endif kfree(node); } @@ -607,7 +619,8 @@ void hfs_bnode_get(struct hfs_bnode *node) if (node) { atomic_inc(&node->refcnt); dprint(DBG_BNODE_REFS, "get_node(%d:%d): %d\n", - node->tree->cnid, node->this, atomic_read(&node->refcnt)); + node->tree->cnid, node->this, + atomic_read(&node->refcnt)); } } @@ -619,7 +632,8 @@ void hfs_bnode_put(struct hfs_bnode *node) int i; dprint(DBG_BNODE_REFS, "put_node(%d:%d): %d\n", - node->tree->cnid, node->this, atomic_read(&node->refcnt)); + node->tree->cnid, node->this, + atomic_read(&node->refcnt)); BUG_ON(!atomic_read(&node->refcnt)); if (!atomic_dec_and_lock(&node->refcnt, &tree->hash_lock)) return; diff --git a/fs/hfsplus/brec.c b/fs/hfsplus/brec.c index 2f39d05..2312de3 100644 --- a/fs/hfsplus/brec.c +++ b/fs/hfsplus/brec.c @@ -39,7 +39,8 @@ u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec) !(node->tree->attributes & HFS_TREE_VARIDXKEYS)) { retval = node->tree->max_key_len + 2; } else { - recoff = hfs_bnode_read_u16(node, node->tree->node_size - (rec + 1) * 2); + recoff = hfs_bnode_read_u16(node, + node->tree->node_size - (rec + 1) * 2); if (!recoff) return 0; @@ -84,7 +85,8 @@ again: end_rec_off = tree->node_size - (node->num_recs + 1) * 2; end_off = hfs_bnode_read_u16(node, end_rec_off); end_rec_off -= 2; - dprint(DBG_BNODE_MOD, "insert_rec: %d, %d, %d, %d\n", rec, size, end_off, end_rec_off); + dprint(DBG_BNODE_MOD, "insert_rec: %d, %d, %d, %d\n", + rec, size, end_off, end_rec_off); if (size > end_rec_off - end_off) { if (new_node) panic("not enough room!\n"); @@ -99,7 +101,9 @@ again: } node->num_recs++; /* write new last offset */ - hfs_bnode_write_u16(node, offsetof(struct hfs_bnode_desc, num_recs), node->num_recs); + hfs_bnode_write_u16(node, + offsetof(struct hfs_bnode_desc, num_recs), + node->num_recs); hfs_bnode_write_u16(node, end_rec_off, end_off + size); data_off = end_off; data_rec_off = end_rec_off + 2; @@ -151,7 +155,8 @@ skip: if (tree->attributes & HFS_TREE_VARIDXKEYS) key_len = be16_to_cpu(fd->search_key->key_len) + 2; else { - fd->search_key->key_len = cpu_to_be16(tree->max_key_len); + fd->search_key->key_len = + cpu_to_be16(tree->max_key_len); key_len = tree->max_key_len + 2; } goto again; @@ -180,7 +185,8 @@ again: mark_inode_dirty(tree->inode); } hfs_bnode_dump(node); - dprint(DBG_BNODE_MOD, "remove_rec: %d, %d\n", fd->record, fd->keylength + fd->entrylength); + dprint(DBG_BNODE_MOD, "remove_rec: %d, %d\n", + fd->record, fd->keylength + fd->entrylength); if (!--node->num_recs) { hfs_bnode_unlink(node); if (!node->parent) @@ -194,7 +200,9 @@ again: __hfs_brec_find(node, fd); goto again; } - hfs_bnode_write_u16(node, offsetof(struct hfs_bnode_desc, num_recs), node->num_recs); + hfs_bnode_write_u16(node, + offsetof(struct hfs_bnode_desc, num_recs), + node->num_recs); if (rec_off == end_off) goto skip; @@ -364,7 +372,8 @@ again: newkeylen = hfs_bnode_read_u16(node, 14) + 2; else fd->keylength = newkeylen = tree->max_key_len + 2; - dprint(DBG_BNODE_MOD, "update_rec: %d, %d, %d\n", rec, fd->keylength, newkeylen); + dprint(DBG_BNODE_MOD, "update_rec: %d, %d, %d\n", + rec, fd->keylength, newkeylen); rec_off = tree->node_size - (rec + 2) * 2; end_rec_off = tree->node_size - (parent->num_recs + 1) * 2; @@ -375,7 +384,7 @@ again: end_off = hfs_bnode_read_u16(parent, end_rec_off); if (end_rec_off - end_off < diff) { - printk(KERN_DEBUG "hfs: splitting index node...\n"); + dprint(DBG_BNODE_MOD, "hfs: splitting index node.\n"); fd->bnode = parent; new_node = hfs_bnode_split(fd); if (IS_ERR(new_node)) @@ -383,7 +392,8 @@ again: parent = fd->bnode; rec = fd->record; rec_off = tree->node_size - (rec + 2) * 2; - end_rec_off = tree->node_size - (parent->num_recs + 1) * 2; + end_rec_off = tree->node_size - + (parent->num_recs + 1) * 2; } } diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c index 22e4d4e..21023d9 100644 --- a/fs/hfsplus/btree.c +++ b/fs/hfsplus/btree.c @@ -51,7 +51,8 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id) goto free_inode; /* Load the header */ - head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc)); + head = (struct hfs_btree_header_rec *)(kmap(page) + + sizeof(struct hfs_bnode_desc)); tree->root = be32_to_cpu(head->root); tree->leaf_count = be32_to_cpu(head->leaf_count); tree->leaf_head = be32_to_cpu(head->leaf_head); @@ -115,7 +116,9 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id) tree->node_size_shift = ffs(size) - 1; - tree->pages_per_bnode = (tree->node_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + tree->pages_per_bnode = + (tree->node_size + PAGE_CACHE_SIZE - 1) >> + PAGE_CACHE_SHIFT; kunmap(page); page_cache_release(page); @@ -144,8 +147,10 @@ void hfs_btree_close(struct hfs_btree *tree) while ((node = tree->node_hash[i])) { tree->node_hash[i] = node->next_hash; if (atomic_read(&node->refcnt)) - printk(KERN_CRIT "hfs: node %d:%d still has %d user(s)!\n", - node->tree->cnid, node->this, atomic_read(&node->refcnt)); + printk(KERN_CRIT "hfs: node %d:%d " + "still has %d user(s)!\n", + node->tree->cnid, node->this, + atomic_read(&node->refcnt)); hfs_bnode_free(node); tree->node_hash_cnt--; } @@ -166,7 +171,8 @@ void hfs_btree_write(struct hfs_btree *tree) return; /* Load the header */ page = node->page[0]; - head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc)); + head = (struct hfs_btree_header_rec *)(kmap(page) + + sizeof(struct hfs_bnode_desc)); head->root = cpu_to_be32(tree->root); head->leaf_count = cpu_to_be32(tree->leaf_count); @@ -272,7 +278,8 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) tree->free_nodes--; mark_inode_dirty(tree->inode); hfs_bnode_put(node); - return hfs_bnode_create(tree, idx); + return hfs_bnode_create(tree, + idx); } } } @@ -287,7 +294,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) kunmap(*pagep); nidx = node->next; if (!nidx) { - printk(KERN_DEBUG "hfs: create new bmap node...\n"); + dprint(DBG_BNODE_MOD, "hfs: create new bmap node.\n"); next_node = hfs_bmap_new_bmap(node, idx); } else next_node = hfs_bnode_find(tree, nidx); @@ -329,7 +336,9 @@ void hfs_bmap_free(struct hfs_bnode *node) hfs_bnode_put(node); if (!i) { /* panic */; - printk(KERN_CRIT "hfs: unable to free bnode %u. bmap not found!\n", node->this); + printk(KERN_CRIT "hfs: unable to free bnode %u. " + "bmap not found!\n", + node->this); return; } node = hfs_bnode_find(tree, i); @@ -337,7 +346,9 @@ void hfs_bmap_free(struct hfs_bnode *node) return; if (node->type != HFS_NODE_MAP) { /* panic */; - printk(KERN_CRIT "hfs: invalid bmap found! (%u,%d)\n", node->this, node->type); + printk(KERN_CRIT "hfs: invalid bmap found! " + "(%u,%d)\n", + node->this, node->type); hfs_bnode_put(node); return; } @@ -350,7 +361,9 @@ void hfs_bmap_free(struct hfs_bnode *node) m = 1 << (~nidx & 7); byte = data[off]; if (!(byte & m)) { - printk(KERN_CRIT "hfs: trying to free free bnode %u(%d)\n", node->this, node->type); + printk(KERN_CRIT "hfs: trying to free free bnode " + "%u(%d)\n", + node->this, node->type); kunmap(page); hfs_bnode_put(node); return; diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c index 8af45fc..b4ba1b3 100644 --- a/fs/hfsplus/catalog.c +++ b/fs/hfsplus/catalog.c @@ -91,7 +91,8 @@ void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms) perms->dev = 0; } -static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode) +static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, + u32 cnid, struct inode *inode) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); @@ -128,20 +129,32 @@ static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct i if (cnid == inode->i_ino) { hfsplus_cat_set_perms(inode, &file->permissions); if (S_ISLNK(inode->i_mode)) { - file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE); - file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR); + file->user_info.fdType = + cpu_to_be32(HFSP_SYMLINK_TYPE); + file->user_info.fdCreator = + cpu_to_be32(HFSP_SYMLINK_CREATOR); } else { - file->user_info.fdType = cpu_to_be32(sbi->type); - file->user_info.fdCreator = cpu_to_be32(sbi->creator); + file->user_info.fdType = + cpu_to_be32(sbi->type); + file->user_info.fdCreator = + cpu_to_be32(sbi->creator); } - if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) - file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); + if (HFSPLUS_FLG_IMMUTABLE & + (file->permissions.rootflags | + file->permissions.userflags)) + file->flags |= + cpu_to_be16(HFSPLUS_FILE_LOCKED); } else { - file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE); - file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR); - file->user_info.fdFlags = cpu_to_be16(0x100); - file->create_date = HFSPLUS_I(sbi->hidden_dir)->create_date; - file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode)->linkid); + file->user_info.fdType = + cpu_to_be32(HFSP_HARDLINK_TYPE); + file->user_info.fdCreator = + cpu_to_be32(HFSP_HFSPLUS_CREATOR); + file->user_info.fdFlags = + cpu_to_be16(0x100); + file->create_date = + HFSPLUS_I(sbi->hidden_dir)->create_date; + file->permissions.dev = + cpu_to_be32(HFSPLUS_I(inode)->linkid); } return sizeof(*file); } @@ -182,12 +195,14 @@ int hfsplus_find_cat(struct super_block *sb, u32 cnid, return -EIO; } - hfsplus_cat_build_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID), - &tmp.thread.nodeName); + hfsplus_cat_build_key_uni(fd->search_key, + be32_to_cpu(tmp.thread.parentID), + &tmp.thread.nodeName); return hfs_brec_find(fd); } -int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode) +int hfsplus_create_cat(u32 cnid, struct inode *dir, + struct qstr *str, struct inode *inode) { struct super_block *sb = dir->i_sb; struct hfs_find_data fd; @@ -195,13 +210,15 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct ino int entry_size; int err; - dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink); + dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", + str->name, cnid, inode->i_nlink); hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL); - entry_size = hfsplus_fill_cat_thread(sb, &entry, S_ISDIR(inode->i_mode) ? + entry_size = hfsplus_fill_cat_thread(sb, &entry, + S_ISDIR(inode->i_mode) ? HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD, - dir->i_ino, str); + dir->i_ino, str); err = hfs_brec_find(&fd); if (err != -ENOENT) { if (!err) @@ -227,7 +244,8 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct ino dir->i_size++; dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(dir); + hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); + hfs_find_exit(&fd); return 0; @@ -249,7 +267,8 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) int err, off; u16 type; - dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid); + dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", + str ? str->name : NULL, cnid); hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); if (!str) { @@ -260,11 +279,15 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) if (err) goto out; - off = fd.entryoffset + offsetof(struct hfsplus_cat_thread, nodeName); + off = fd.entryoffset + + offsetof(struct hfsplus_cat_thread, nodeName); fd.search_key->cat.parent = cpu_to_be32(dir->i_ino); - hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.length, off, 2); + hfs_bnode_read(fd.bnode, + &fd.search_key->cat.name.length, off, 2); len = be16_to_cpu(fd.search_key->cat.name.length) * 2; - hfs_bnode_read(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len); + hfs_bnode_read(fd.bnode, + &fd.search_key->cat.name.unicode, + off + 2, len); fd.search_key->key_len = cpu_to_be16(6 + len); } else hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str); @@ -281,7 +304,8 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA); #endif - off = fd.entryoffset + offsetof(struct hfsplus_cat_file, rsrc_fork); + off = fd.entryoffset + + offsetof(struct hfsplus_cat_file, rsrc_fork); hfs_bnode_read(fd.bnode, &fork, off, sizeof(fork)); hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC); } @@ -308,7 +332,7 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str) dir->i_size--; dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(dir); + hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY); out: hfs_find_exit(&fd); @@ -325,7 +349,8 @@ int hfsplus_rename_cat(u32 cnid, int entry_size, type; int err = 0; - dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name, + dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", + cnid, src_dir->i_ino, src_name->name, dst_dir->i_ino, dst_name->name); hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &src_fd); dst_fd = src_fd; @@ -353,7 +378,6 @@ int hfsplus_rename_cat(u32 cnid, goto out; dst_dir->i_size++; dst_dir->i_mtime = dst_dir->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(dst_dir); /* finally remove the old entry */ hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name); @@ -365,7 +389,6 @@ int hfsplus_rename_cat(u32 cnid, goto out; src_dir->i_size--; src_dir->i_mtime = src_dir->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(src_dir); /* remove old thread entry */ hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL); @@ -379,7 +402,8 @@ int hfsplus_rename_cat(u32 cnid, /* create new thread entry */ hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL); - entry_size = hfsplus_fill_cat_thread(sb, &entry, type, dst_dir->i_ino, dst_name); + entry_size = hfsplus_fill_cat_thread(sb, &entry, type, + dst_dir->i_ino, dst_name); err = hfs_brec_find(&dst_fd); if (err != -ENOENT) { if (!err) @@ -387,6 +411,9 @@ int hfsplus_rename_cat(u32 cnid, goto out; } err = hfs_brec_insert(&dst_fd, &entry, entry_size); + + hfsplus_mark_inode_dirty(dst_dir, HFSPLUS_I_CAT_DIRTY); + hfsplus_mark_inode_dirty(src_dir, HFSPLUS_I_CAT_DIRTY); out: hfs_bnode_put(dst_fd.bnode); hfs_find_exit(&src_fd); diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c index e318bbc..f896dc84 100644 --- a/fs/hfsplus/dir.c +++ b/fs/hfsplus/dir.c @@ -37,7 +37,7 @@ static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry, sb = dir->i_sb; - dentry->d_op = &hfsplus_dentry_operations; + d_set_d_op(dentry, &hfsplus_dentry_operations); dentry->d_fsdata = NULL; hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, &dentry->d_name); @@ -66,11 +66,17 @@ again: goto fail; } cnid = be32_to_cpu(entry.file.id); - if (entry.file.user_info.fdType == cpu_to_be32(HFSP_HARDLINK_TYPE) && - entry.file.user_info.fdCreator == cpu_to_be32(HFSP_HFSPLUS_CREATOR) && - (entry.file.create_date == HFSPLUS_I(HFSPLUS_SB(sb)->hidden_dir)->create_date || - entry.file.create_date == HFSPLUS_I(sb->s_root->d_inode)->create_date) && - HFSPLUS_SB(sb)->hidden_dir) { + if (entry.file.user_info.fdType == + cpu_to_be32(HFSP_HARDLINK_TYPE) && + entry.file.user_info.fdCreator == + cpu_to_be32(HFSP_HFSPLUS_CREATOR) && + (entry.file.create_date == + HFSPLUS_I(HFSPLUS_SB(sb)->hidden_dir)-> + create_date || + entry.file.create_date == + HFSPLUS_I(sb->s_root->d_inode)-> + create_date) && + HFSPLUS_SB(sb)->hidden_dir) { struct qstr str; char name[32]; @@ -83,11 +89,13 @@ again: linkid = 0; } else { dentry->d_fsdata = (void *)(unsigned long)cnid; - linkid = be32_to_cpu(entry.file.permissions.dev); + linkid = + be32_to_cpu(entry.file.permissions.dev); str.len = sprintf(name, "iNode%d", linkid); str.name = name; hfsplus_cat_build_key(sb, fd.search_key, - HFSPLUS_SB(sb)->hidden_dir->i_ino, &str); + HFSPLUS_SB(sb)->hidden_dir->i_ino, + &str); goto again; } } else if (!dentry->d_fsdata) @@ -139,7 +147,8 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir) filp->f_pos++; /* fall through */ case 1: - hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength); + hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, + fd.entrylength); if (be16_to_cpu(entry.type) != HFSPLUS_FOLDER_THREAD) { printk(KERN_ERR "hfs: bad catalog folder thread\n"); err = -EIO; @@ -169,14 +178,16 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir) err = -EIO; goto out; } - hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength); + hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, + fd.entrylength); type = be16_to_cpu(entry.type); len = HFSPLUS_MAX_STRLEN; err = hfsplus_uni2asc(sb, &fd.key->cat.name, strbuf, &len); if (err) goto out; if (type == HFSPLUS_FOLDER) { - if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) { + if (fd.entrylength < + sizeof(struct hfsplus_cat_folder)) { printk(KERN_ERR "hfs: small dir entry\n"); err = -EIO; goto out; @@ -202,7 +213,7 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir) err = -EIO; goto out; } - next: +next: filp->f_pos++; if (filp->f_pos >= inode->i_size) goto out; @@ -273,7 +284,8 @@ static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir, HFSPLUS_I(inode)->linkid = id; cnid = sbi->next_cnid++; src_dentry->d_fsdata = (void *)(unsigned long)cnid; - res = hfsplus_create_cat(cnid, src_dir, &src_dentry->d_name, inode); + res = hfsplus_create_cat(cnid, src_dir, + &src_dentry->d_name, inode); if (res) /* panic? */ goto out; @@ -317,8 +329,10 @@ static int hfsplus_unlink(struct inode *dir, struct dentry *dentry) res = hfsplus_rename_cat(inode->i_ino, dir, &dentry->d_name, sbi->hidden_dir, &str); - if (!res) + if (!res) { inode->i_flags |= S_DEAD; + drop_nlink(inode); + } goto out; } res = hfsplus_delete_cat(cnid, dir, &dentry->d_name); @@ -483,6 +497,7 @@ const struct inode_operations hfsplus_dir_inode_operations = { }; const struct file_operations hfsplus_dir_operations = { + .fsync = hfsplus_file_fsync, .read = generic_read_dir, .readdir = hfsplus_readdir, .unlocked_ioctl = hfsplus_ioctl, diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c index 0c9cb18..52a0bca 100644 --- a/fs/hfsplus/extents.c +++ b/fs/hfsplus/extents.c @@ -83,7 +83,8 @@ static u32 hfsplus_ext_lastblock(struct hfsplus_extent *ext) return be32_to_cpu(ext->start_block) + be32_to_cpu(ext->block_count); } -static void __hfsplus_ext_write_extent(struct inode *inode, struct hfs_find_data *fd) +static void __hfsplus_ext_write_extent(struct inode *inode, + struct hfs_find_data *fd) { struct hfsplus_inode_info *hip = HFSPLUS_I(inode); int res; @@ -95,24 +96,32 @@ static void __hfsplus_ext_write_extent(struct inode *inode, struct hfs_find_data HFSPLUS_TYPE_RSRC : HFSPLUS_TYPE_DATA); res = hfs_brec_find(fd); - if (hip->flags & HFSPLUS_FLG_EXT_NEW) { + if (hip->extent_state & HFSPLUS_EXT_NEW) { if (res != -ENOENT) return; hfs_brec_insert(fd, hip->cached_extents, sizeof(hfsplus_extent_rec)); - hip->flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW); + hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW); } else { if (res) return; hfs_bnode_write(fd->bnode, hip->cached_extents, fd->entryoffset, fd->entrylength); - hip->flags &= ~HFSPLUS_FLG_EXT_DIRTY; + hip->extent_state &= ~HFSPLUS_EXT_DIRTY; } + + /* + * We can't just use hfsplus_mark_inode_dirty here, because we + * also get called from hfsplus_write_inode, which should not + * redirty the inode. Instead the callers have to be careful + * to explicily mark the inode dirty, too. + */ + set_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags); } static void hfsplus_ext_write_extent_locked(struct inode *inode) { - if (HFSPLUS_I(inode)->flags & HFSPLUS_FLG_EXT_DIRTY) { + if (HFSPLUS_I(inode)->extent_state & HFSPLUS_EXT_DIRTY) { struct hfs_find_data fd; hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd); @@ -144,18 +153,20 @@ static inline int __hfsplus_ext_read_extent(struct hfs_find_data *fd, return -ENOENT; if (fd->entrylength != sizeof(hfsplus_extent_rec)) return -EIO; - hfs_bnode_read(fd->bnode, extent, fd->entryoffset, sizeof(hfsplus_extent_rec)); + hfs_bnode_read(fd->bnode, extent, fd->entryoffset, + sizeof(hfsplus_extent_rec)); return 0; } -static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd, struct inode *inode, u32 block) +static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd, + struct inode *inode, u32 block) { struct hfsplus_inode_info *hip = HFSPLUS_I(inode); int res; WARN_ON(!mutex_is_locked(&hip->extents_lock)); - if (hip->flags & HFSPLUS_FLG_EXT_DIRTY) + if (hip->extent_state & HFSPLUS_EXT_DIRTY) __hfsplus_ext_write_extent(inode, fd); res = __hfsplus_ext_read_extent(fd, hip->cached_extents, inode->i_ino, @@ -164,10 +175,11 @@ static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd, struct in HFSPLUS_TYPE_DATA); if (!res) { hip->cached_start = be32_to_cpu(fd->key->ext.start_block); - hip->cached_blocks = hfsplus_ext_block_count(hip->cached_extents); + hip->cached_blocks = + hfsplus_ext_block_count(hip->cached_extents); } else { hip->cached_start = hip->cached_blocks = 0; - hip->flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW); + hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW); } return res; } @@ -197,6 +209,7 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock, struct hfsplus_inode_info *hip = HFSPLUS_I(inode); int res = -EIO; u32 ablock, dblock, mask; + int was_dirty = 0; int shift; /* Convert inode block to disk allocation block */ @@ -223,27 +236,37 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock, return -EIO; mutex_lock(&hip->extents_lock); + + /* + * hfsplus_ext_read_extent will write out a cached extent into + * the extents btree. In that case we may have to mark the inode + * dirty even for a pure read of an extent here. + */ + was_dirty = (hip->extent_state & HFSPLUS_EXT_DIRTY); res = hfsplus_ext_read_extent(inode, ablock); - if (!res) { - dblock = hfsplus_ext_find_block(hip->cached_extents, - ablock - hip->cached_start); - } else { + if (res) { mutex_unlock(&hip->extents_lock); return -EIO; } + dblock = hfsplus_ext_find_block(hip->cached_extents, + ablock - hip->cached_start); mutex_unlock(&hip->extents_lock); done: - dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", inode->i_ino, (long long)iblock, dblock); + dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", + inode->i_ino, (long long)iblock, dblock); mask = (1 << sbi->fs_shift) - 1; - map_bh(bh_result, sb, (dblock << sbi->fs_shift) + sbi->blockoffset + (iblock & mask)); + map_bh(bh_result, sb, + (dblock << sbi->fs_shift) + sbi->blockoffset + + (iblock & mask)); if (create) { set_buffer_new(bh_result); hip->phys_size += sb->s_blocksize; hip->fs_blocks++; inode_add_bytes(inode, sb->s_blocksize); - mark_inode_dirty(inode); } + if (create || was_dirty) + mark_inode_dirty(inode); return 0; } @@ -326,7 +349,8 @@ found: } } -int hfsplus_free_fork(struct super_block *sb, u32 cnid, struct hfsplus_fork_raw *fork, int type) +int hfsplus_free_fork(struct super_block *sb, u32 cnid, + struct hfsplus_fork_raw *fork, int type) { struct hfs_find_data fd; hfsplus_extent_rec ext_entry; @@ -373,12 +397,13 @@ int hfsplus_file_extend(struct inode *inode) u32 start, len, goal; int res; - if (sbi->alloc_file->i_size * 8 < - sbi->total_blocks - sbi->free_blocks + 8) { - // extend alloc file - printk(KERN_ERR "hfs: extend alloc file! (%Lu,%u,%u)\n", - sbi->alloc_file->i_size * 8, - sbi->total_blocks, sbi->free_blocks); + if (sbi->total_blocks - sbi->free_blocks + 8 > + sbi->alloc_file->i_size * 8) { + /* extend alloc file */ + printk(KERN_ERR "hfs: extend alloc file! " + "(%llu,%u,%u)\n", + sbi->alloc_file->i_size * 8, + sbi->total_blocks, sbi->free_blocks); return -ENOSPC; } @@ -429,7 +454,7 @@ int hfsplus_file_extend(struct inode *inode) start, len); if (!res) { hfsplus_dump_extent(hip->cached_extents); - hip->flags |= HFSPLUS_FLG_EXT_DIRTY; + hip->extent_state |= HFSPLUS_EXT_DIRTY; hip->cached_blocks += len; } else if (res == -ENOSPC) goto insert_extent; @@ -438,7 +463,7 @@ out: mutex_unlock(&hip->extents_lock); if (!res) { hip->alloc_blocks += len; - mark_inode_dirty(inode); + hfsplus_mark_inode_dirty(inode, HFSPLUS_I_ALLOC_DIRTY); } return res; @@ -450,7 +475,7 @@ insert_extent: hip->cached_extents[0].start_block = cpu_to_be32(start); hip->cached_extents[0].block_count = cpu_to_be32(len); hfsplus_dump_extent(hip->cached_extents); - hip->flags |= HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW; + hip->extent_state |= HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW; hip->cached_start = hip->alloc_blocks; hip->cached_blocks = len; @@ -466,8 +491,9 @@ void hfsplus_file_truncate(struct inode *inode) u32 alloc_cnt, blk_cnt, start; int res; - dprint(DBG_INODE, "truncate: %lu, %Lu -> %Lu\n", - inode->i_ino, (long long)hip->phys_size, inode->i_size); + dprint(DBG_INODE, "truncate: %lu, %llu -> %llu\n", + inode->i_ino, (long long)hip->phys_size, + inode->i_size); if (inode->i_size > hip->phys_size) { struct address_space *mapping = inode->i_mapping; @@ -481,7 +507,8 @@ void hfsplus_file_truncate(struct inode *inode) &page, &fsdata); if (res) return; - res = pagecache_write_end(NULL, mapping, size, 0, 0, page, fsdata); + res = pagecache_write_end(NULL, mapping, size, + 0, 0, page, fsdata); if (res < 0) return; mark_inode_dirty(inode); @@ -513,12 +540,12 @@ void hfsplus_file_truncate(struct inode *inode) alloc_cnt - start, alloc_cnt - blk_cnt); hfsplus_dump_extent(hip->cached_extents); if (blk_cnt > start) { - hip->flags |= HFSPLUS_FLG_EXT_DIRTY; + hip->extent_state |= HFSPLUS_EXT_DIRTY; break; } alloc_cnt = start; hip->cached_start = hip->cached_blocks = 0; - hip->flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW); + hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW); hfs_brec_remove(&fd); } hfs_find_exit(&fd); @@ -527,7 +554,8 @@ void hfsplus_file_truncate(struct inode *inode) hip->alloc_blocks = blk_cnt; out: hip->phys_size = inode->i_size; - hip->fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; + hip->fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> + sb->s_blocksize_bits; inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits); - mark_inode_dirty(inode); + hfsplus_mark_inode_dirty(inode, HFSPLUS_I_ALLOC_DIRTY); } diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h index cb3653e..d685752 100644 --- a/fs/hfsplus/hfsplus_fs.h +++ b/fs/hfsplus/hfsplus_fs.h @@ -23,13 +23,16 @@ #define DBG_EXTENT 0x00000020 #define DBG_BITMAP 0x00000040 -//#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD) -//#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) -//#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) +#if 0 +#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD) +#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) +#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) +#endif #define DBG_MASK (0) #define dprint(flg, fmt, args...) \ - if (flg & DBG_MASK) printk(fmt , ## args) + if (flg & DBG_MASK) \ + printk(fmt , ## args) /* Runtime config options */ #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */ @@ -37,7 +40,8 @@ #define HFSPLUS_TYPE_DATA 0x00 #define HFSPLUS_TYPE_RSRC 0xFF -typedef int (*btree_keycmp)(const hfsplus_btree_key *, const hfsplus_btree_key *); +typedef int (*btree_keycmp)(const hfsplus_btree_key *, + const hfsplus_btree_key *); #define NODE_HASH_SIZE 256 @@ -61,7 +65,6 @@ struct hfs_btree { unsigned int max_key_len; unsigned int depth; - //unsigned int map1_size, map_size; struct mutex tree_lock; unsigned int pages_per_bnode; @@ -107,8 +110,8 @@ struct hfsplus_vh; struct hfs_btree; struct hfsplus_sb_info { - struct buffer_head *s_vhbh; struct hfsplus_vh *s_vhdr; + struct hfsplus_vh *s_backup_vhdr; struct hfs_btree *ext_tree; struct hfs_btree *cat_tree; struct hfs_btree *attr_tree; @@ -118,7 +121,8 @@ struct hfsplus_sb_info { /* Runtime variables */ u32 blockoffset; - u32 sect_count; + sector_t part_start; + sector_t sect_count; int fs_shift; /* immutable data from the volume header */ @@ -155,6 +159,12 @@ struct hfsplus_sb_info { #define HFSPLUS_SB_FORCE 2 #define HFSPLUS_SB_HFSX 3 #define HFSPLUS_SB_CASEFOLD 4 +#define HFSPLUS_SB_NOBARRIER 5 + +static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} struct hfsplus_inode_info { @@ -170,7 +180,7 @@ struct hfsplus_inode_info { u32 cached_blocks; hfsplus_extent_rec first_extents; hfsplus_extent_rec cached_extents; - unsigned long flags; + unsigned int extent_state; struct mutex extents_lock; /* @@ -185,6 +195,11 @@ struct hfsplus_inode_info { u32 linkid; /* + * Accessed using atomic bitops. + */ + unsigned long flags; + + /* * Protected by i_mutex. */ sector_t fs_blocks; @@ -195,12 +210,34 @@ struct hfsplus_inode_info { struct inode vfs_inode; }; -#define HFSPLUS_FLG_RSRC 0x0001 -#define HFSPLUS_FLG_EXT_DIRTY 0x0002 -#define HFSPLUS_FLG_EXT_NEW 0x0004 +#define HFSPLUS_EXT_DIRTY 0x0001 +#define HFSPLUS_EXT_NEW 0x0002 + +#define HFSPLUS_I_RSRC 0 /* represents a resource fork */ +#define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */ +#define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */ +#define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */ + +#define HFSPLUS_IS_RSRC(inode) \ + test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags) + +static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) +{ + return list_entry(inode, struct hfsplus_inode_info, vfs_inode); +} -#define HFSPLUS_IS_DATA(inode) (!(HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC)) -#define HFSPLUS_IS_RSRC(inode) (HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC) +/* + * Mark an inode dirty, and also mark the btree in which the + * specific type of metadata is stored. + * For data or metadata that gets written back by into the catalog btree + * by hfsplus_write_inode a plain mark_inode_dirty call is enough. + */ +static inline void hfsplus_mark_inode_dirty(struct inode *inode, + unsigned int flag) +{ + set_bit(flag, &HFSPLUS_I(inode)->flags); + mark_inode_dirty(inode); +} struct hfs_find_data { /* filled by caller */ @@ -318,9 +355,12 @@ int hfs_brec_read(struct hfs_find_data *, void *, int); int hfs_brec_goto(struct hfs_find_data *, int); /* catalog.c */ -int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); -int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); -void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *); +int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, + const hfsplus_btree_key *); +int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, + const hfsplus_btree_key *); +void hfsplus_cat_build_key(struct super_block *sb, + hfsplus_btree_key *, u32, struct qstr *); int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *); int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *); int hfsplus_delete_cat(u32, struct inode *, struct qstr *); @@ -336,7 +376,8 @@ extern const struct file_operations hfsplus_dir_operations; int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); void hfsplus_ext_write_extent(struct inode *); int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int); -int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int); +int hfsplus_free_fork(struct super_block *, u32, + struct hfsplus_fork_raw *, int); int hfsplus_file_extend(struct inode *); void hfsplus_file_truncate(struct inode *); @@ -351,6 +392,7 @@ int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *); int hfsplus_cat_write_inode(struct inode *); struct inode *hfsplus_new_inode(struct super_block *, int); void hfsplus_delete_inode(struct inode *); +int hfsplus_file_fsync(struct file *file, int datasync); /* ioctl.c */ long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); @@ -362,6 +404,7 @@ ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size); /* options.c */ int hfsplus_parse_options(char *, struct hfsplus_sb_info *); +int hfsplus_parse_options_remount(char *input, int *force); void hfsplus_fill_defaults(struct hfsplus_sb_info *); int hfsplus_show_options(struct seq_file *, struct vfsmount *); @@ -375,45 +418,26 @@ extern u16 hfsplus_decompose_table[]; extern u16 hfsplus_compose_table[]; /* unicode.c */ -int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *); -int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *); -int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *); -int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int); -int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str); -int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2); +int hfsplus_strcasecmp(const struct hfsplus_unistr *, + const struct hfsplus_unistr *); +int hfsplus_strcmp(const struct hfsplus_unistr *, + const struct hfsplus_unistr *); +int hfsplus_uni2asc(struct super_block *, + const struct hfsplus_unistr *, char *, int *); +int hfsplus_asc2uni(struct super_block *, + struct hfsplus_unistr *, const char *, int); +int hfsplus_hash_dentry(const struct dentry *dentry, + const struct inode *inode, struct qstr *str); +int hfsplus_compare_dentry(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); /* wrapper.c */ int hfsplus_read_wrapper(struct super_block *); - int hfs_part_find(struct super_block *, sector_t *, sector_t *); - -/* access macros */ -static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) -{ - return sb->s_fs_info; -} - -static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) -{ - return list_entry(inode, struct hfsplus_inode_info, vfs_inode); -} - -#define sb_bread512(sb, sec, data) ({ \ - struct buffer_head *__bh; \ - sector_t __block; \ - loff_t __start; \ - int __offset; \ - \ - __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\ - __block = __start >> (sb)->s_blocksize_bits; \ - __offset = __start & ((sb)->s_blocksize - 1); \ - __bh = sb_bread((sb), __block); \ - if (likely(__bh != NULL)) \ - data = (void *)(__bh->b_data + __offset);\ - else \ - data = NULL; \ - __bh; \ -}) +int hfsplus_submit_bio(struct block_device *bdev, sector_t sector, + void *data, int rw); /* time macros */ #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U) diff --git a/fs/hfsplus/hfsplus_raw.h b/fs/hfsplus/hfsplus_raw.h index 6892899..927cdd6 100644 --- a/fs/hfsplus/hfsplus_raw.h +++ b/fs/hfsplus/hfsplus_raw.h @@ -36,7 +36,8 @@ #define HFSP_WRAPOFF_EMBEDSIG 0x7C #define HFSP_WRAPOFF_EMBEDEXT 0x7E -#define HFSP_HIDDENDIR_NAME "\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data" +#define HFSP_HIDDENDIR_NAME \ + "\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80\xe2\x90\x80HFS+ Private Data" #define HFSP_HARDLINK_TYPE 0x686c6e6b /* 'hlnk' */ #define HFSP_HFSPLUS_CREATOR 0x6866732b /* 'hfs+' */ diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index 8afd7e8..a8df651 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -8,6 +8,7 @@ * Inode handling routines */ +#include <linux/blkdev.h> #include <linux/mm.h> #include <linux/fs.h> #include <linux/pagemap.h> @@ -77,7 +78,8 @@ static int hfsplus_releasepage(struct page *page, gfp_t mask) if (!tree) return 0; if (tree->node_size >= PAGE_CACHE_SIZE) { - nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT); + nidx = page->index >> + (tree->node_size_shift - PAGE_CACHE_SHIFT); spin_lock(&tree->hash_lock); node = hfs_bnode_findhash(tree, nidx); if (!node) @@ -90,7 +92,8 @@ static int hfsplus_releasepage(struct page *page, gfp_t mask) } spin_unlock(&tree->hash_lock); } else { - nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift); + nidx = page->index << + (PAGE_CACHE_SHIFT - tree->node_size_shift); i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift); spin_lock(&tree->hash_lock); do { @@ -166,8 +169,8 @@ const struct dentry_operations hfsplus_dentry_operations = { .d_compare = hfsplus_compare_dentry, }; -static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *nd) +static struct dentry *hfsplus_file_lookup(struct inode *dir, + struct dentry *dentry, struct nameidata *nd) { struct hfs_find_data fd; struct super_block *sb = dir->i_sb; @@ -190,7 +193,9 @@ static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dent inode->i_ino = dir->i_ino; INIT_LIST_HEAD(&hip->open_dir_list); mutex_init(&hip->extents_lock); - hip->flags = HFSPLUS_FLG_RSRC; + hip->extent_state = 0; + hip->flags = 0; + set_bit(HFSPLUS_I_RSRC, &hip->flags); hfs_find_init(HFSPLUS_SB(sb)->cat_tree, &fd); err = hfsplus_find_cat(sb, dir->i_ino, &fd); @@ -219,7 +224,8 @@ out: return NULL; } -static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir) +static void hfsplus_get_perms(struct inode *inode, + struct hfsplus_perm *perms, int dir) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); u16 mode; @@ -302,29 +308,41 @@ static int hfsplus_setattr(struct dentry *dentry, struct iattr *attr) return 0; } -static int hfsplus_file_fsync(struct file *filp, int datasync) +int hfsplus_file_fsync(struct file *file, int datasync) { - struct inode *inode = filp->f_mapping->host; - struct super_block * sb; - int ret, err; - - /* sync the inode to buffers */ - ret = write_inode_now(inode, 0); - - /* sync the superblock to buffers */ - sb = inode->i_sb; - if (sb->s_dirt) { - if (!(sb->s_flags & MS_RDONLY)) - hfsplus_sync_fs(sb, 1); - else - sb->s_dirt = 0; + struct inode *inode = file->f_mapping->host; + struct hfsplus_inode_info *hip = HFSPLUS_I(inode); + struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); + int error = 0, error2; + + /* + * Sync inode metadata into the catalog and extent trees. + */ + sync_inode_metadata(inode, 1); + + /* + * And explicitly write out the btrees. + */ + if (test_and_clear_bit(HFSPLUS_I_CAT_DIRTY, &hip->flags)) + error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); + + if (test_and_clear_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags)) { + error2 = + filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); + if (!error) + error = error2; } - /* .. finally sync the buffers to disk */ - err = sync_blockdev(sb->s_bdev); - if (!ret) - ret = err; - return ret; + if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) { + error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); + if (!error) + error = error2; + } + + if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) + blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); + + return error; } static const struct inode_operations hfsplus_file_inode_operations = { @@ -337,7 +355,7 @@ static const struct inode_operations hfsplus_file_inode_operations = { }; static const struct file_operations hfsplus_file_operations = { - .llseek = generic_file_llseek, + .llseek = generic_file_llseek, .read = do_sync_read, .aio_read = generic_file_aio_read, .write = do_sync_write, @@ -370,6 +388,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, int mode) INIT_LIST_HEAD(&hip->open_dir_list); mutex_init(&hip->extents_lock); atomic_set(&hip->opencnt, 0); + hip->extent_state = 0; hip->flags = 0; memset(hip->first_extents, 0, sizeof(hfsplus_extent_rec)); memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec)); @@ -457,7 +476,8 @@ void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork) } } -void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork) +void hfsplus_inode_write_fork(struct inode *inode, + struct hfsplus_fork_raw *fork) { memcpy(&fork->extents, &HFSPLUS_I(inode)->first_extents, sizeof(hfsplus_extent_rec)); @@ -499,13 +519,14 @@ int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd) hfs_bnode_read(fd->bnode, &entry, fd->entryoffset, sizeof(struct hfsplus_cat_file)); - hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ? - &file->data_fork : &file->rsrc_fork); + hfsplus_inode_read_fork(inode, HFSPLUS_IS_RSRC(inode) ? + &file->rsrc_fork : &file->data_fork); hfsplus_get_perms(inode, &file->permissions, 0); inode->i_nlink = 1; if (S_ISREG(inode->i_mode)) { if (file->permissions.dev) - inode->i_nlink = be32_to_cpu(file->permissions.dev); + inode->i_nlink = + be32_to_cpu(file->permissions.dev); inode->i_op = &hfsplus_file_inode_operations; inode->i_fop = &hfsplus_file_operations; inode->i_mapping->a_ops = &hfsplus_aops; @@ -578,7 +599,9 @@ int hfsplus_cat_write_inode(struct inode *inode) sizeof(struct hfsplus_cat_file)); hfsplus_inode_write_fork(inode, &file->data_fork); hfsplus_cat_set_perms(inode, &file->permissions); - if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE) + if (HFSPLUS_FLG_IMMUTABLE & + (file->permissions.rootflags | + file->permissions.userflags)) file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED); else file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED); @@ -588,6 +611,8 @@ int hfsplus_cat_write_inode(struct inode *inode) hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, sizeof(struct hfsplus_cat_file)); } + + set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags); out: hfs_find_exit(&fd); return 0; diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c index 5b4667e..508ce66 100644 --- a/fs/hfsplus/ioctl.c +++ b/fs/hfsplus/ioctl.c @@ -28,7 +28,7 @@ static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags) if (inode->i_flags & S_IMMUTABLE) flags |= FS_IMMUTABLE_FL; - if (inode->i_flags |= S_APPEND) + if (inode->i_flags & S_APPEND) flags |= FS_APPEND_FL; if (hip->userflags & HFSPLUS_FLG_NODUMP) flags |= FS_NODUMP_FL; @@ -92,7 +92,7 @@ static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags) mark_inode_dirty(inode); out_unlock_inode: - mutex_lock(&inode->i_mutex); + mutex_unlock(&inode->i_mutex); out_drop_write: mnt_drop_write(file->f_path.mnt); out: @@ -147,9 +147,11 @@ int hfsplus_setxattr(struct dentry *dentry, const char *name, res = -ERANGE; } else res = -EOPNOTSUPP; - if (!res) + if (!res) { hfs_bnode_write(fd.bnode, &entry, fd.entryoffset, sizeof(struct hfsplus_cat_file)); + hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY); + } out: hfs_find_exit(&fd); return res; diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c index f9ab276..bb62a5882 100644 --- a/fs/hfsplus/options.c +++ b/fs/hfsplus/options.c @@ -23,6 +23,7 @@ enum { opt_umask, opt_uid, opt_gid, opt_part, opt_session, opt_nls, opt_nodecompose, opt_decompose, + opt_barrier, opt_nobarrier, opt_force, opt_err }; @@ -37,6 +38,8 @@ static const match_table_t tokens = { { opt_nls, "nls=%s" }, { opt_decompose, "decompose" }, { opt_nodecompose, "nodecompose" }, + { opt_barrier, "barrier" }, + { opt_nobarrier, "nobarrier" }, { opt_force, "force" }, { opt_err, NULL } }; @@ -65,6 +68,32 @@ static inline int match_fourchar(substring_t *arg, u32 *result) return 0; } +int hfsplus_parse_options_remount(char *input, int *force) +{ + char *p; + substring_t args[MAX_OPT_ARGS]; + int token; + + if (!input) + return 0; + + while ((p = strsep(&input, ",")) != NULL) { + if (!*p) + continue; + + token = match_token(p, tokens, args); + switch (token) { + case opt_force: + *force = 1; + break; + default: + break; + } + } + + return 1; +} + /* Parse options from mount. Returns 0 on failure */ /* input is the options passed to mount() as a string */ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi) @@ -136,7 +165,9 @@ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi) if (p) sbi->nls = load_nls(p); if (!sbi->nls) { - printk(KERN_ERR "hfs: unable to load nls mapping \"%s\"\n", p); + printk(KERN_ERR "hfs: unable to load " + "nls mapping \"%s\"\n", + p); kfree(p); return 0; } @@ -148,6 +179,12 @@ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi) case opt_nodecompose: set_bit(HFSPLUS_SB_NODECOMPOSE, &sbi->flags); break; + case opt_barrier: + clear_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags); + break; + case opt_nobarrier: + set_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags); + break; case opt_force: set_bit(HFSPLUS_SB_FORCE, &sbi->flags); break; @@ -177,7 +214,8 @@ int hfsplus_show_options(struct seq_file *seq, struct vfsmount *mnt) seq_printf(seq, ",creator=%.4s", (char *)&sbi->creator); if (sbi->type != HFSPLUS_DEF_CR_TYPE) seq_printf(seq, ",type=%.4s", (char *)&sbi->type); - seq_printf(seq, ",umask=%o,uid=%u,gid=%u", sbi->umask, sbi->uid, sbi->gid); + seq_printf(seq, ",umask=%o,uid=%u,gid=%u", sbi->umask, + sbi->uid, sbi->gid); if (sbi->part >= 0) seq_printf(seq, ",part=%u", sbi->part); if (sbi->session >= 0) @@ -186,5 +224,7 @@ int hfsplus_show_options(struct seq_file *seq, struct vfsmount *mnt) seq_printf(seq, ",nls=%s", sbi->nls->charset); if (test_bit(HFSPLUS_SB_NODECOMPOSE, &sbi->flags)) seq_printf(seq, ",nodecompose"); + if (test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) + seq_printf(seq, ",nobarrier"); return 0; } diff --git a/fs/hfsplus/part_tbl.c b/fs/hfsplus/part_tbl.c index 208b16c..d66ad11 100644 --- a/fs/hfsplus/part_tbl.c +++ b/fs/hfsplus/part_tbl.c @@ -2,7 +2,8 @@ * linux/fs/hfsplus/part_tbl.c * * Copyright (C) 1996-1997 Paul H. Hargrove - * This file may be distributed under the terms of the GNU General Public License. + * This file may be distributed under the terms of + * the GNU General Public License. * * Original code to handle the new style Mac partition table based on * a patch contributed by Holger Schemel (aeglos@valinor.owl.de). @@ -13,6 +14,7 @@ * */ +#include <linux/slab.h> #include "hfsplus_fs.h" /* offsets to various blocks */ @@ -58,77 +60,94 @@ struct new_pmap { */ struct old_pmap { __be16 pdSig; /* Signature bytes */ - struct old_pmap_entry { + struct old_pmap_entry { __be32 pdStart; __be32 pdSize; __be32 pdFSID; } pdEntry[42]; } __packed; +static int hfs_parse_old_pmap(struct super_block *sb, struct old_pmap *pm, + sector_t *part_start, sector_t *part_size) +{ + struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); + int i; + + for (i = 0; i < 42; i++) { + struct old_pmap_entry *p = &pm->pdEntry[i]; + + if (p->pdStart && p->pdSize && + p->pdFSID == cpu_to_be32(0x54465331)/*"TFS1"*/ && + (sbi->part < 0 || sbi->part == i)) { + *part_start += be32_to_cpu(p->pdStart); + *part_size = be32_to_cpu(p->pdSize); + return 0; + } + } + + return -ENOENT; +} + +static int hfs_parse_new_pmap(struct super_block *sb, struct new_pmap *pm, + sector_t *part_start, sector_t *part_size) +{ + struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); + int size = be32_to_cpu(pm->pmMapBlkCnt); + int res; + int i = 0; + + do { + if (!memcmp(pm->pmPartType, "Apple_HFS", 9) && + (sbi->part < 0 || sbi->part == i)) { + *part_start += be32_to_cpu(pm->pmPyPartStart); + *part_size = be32_to_cpu(pm->pmPartBlkCnt); + return 0; + } + + if (++i >= size) + return -ENOENT; + + res = hfsplus_submit_bio(sb->s_bdev, + *part_start + HFS_PMAP_BLK + i, + pm, READ); + if (res) + return res; + } while (pm->pmSig == cpu_to_be16(HFS_NEW_PMAP_MAGIC)); + + return -ENOENT; +} + /* - * hfs_part_find() - * - * Parse the partition map looking for the - * start and length of the 'part'th HFS partition. + * Parse the partition map looking for the start and length of a + * HFS/HFS+ partition. */ int hfs_part_find(struct super_block *sb, - sector_t *part_start, sector_t *part_size) + sector_t *part_start, sector_t *part_size) { - struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); - struct buffer_head *bh; - __be16 *data; - int i, size, res; + void *data; + int res; + + data = kmalloc(HFSPLUS_SECTOR_SIZE, GFP_KERNEL); + if (!data) + return -ENOMEM; - res = -ENOENT; - bh = sb_bread512(sb, *part_start + HFS_PMAP_BLK, data); - if (!bh) - return -EIO; + res = hfsplus_submit_bio(sb->s_bdev, *part_start + HFS_PMAP_BLK, + data, READ); + if (res) + return res; - switch (be16_to_cpu(*data)) { + switch (be16_to_cpu(*((__be16 *)data))) { case HFS_OLD_PMAP_MAGIC: - { - struct old_pmap *pm; - struct old_pmap_entry *p; - - pm = (struct old_pmap *)bh->b_data; - p = pm->pdEntry; - size = 42; - for (i = 0; i < size; p++, i++) { - if (p->pdStart && p->pdSize && - p->pdFSID == cpu_to_be32(0x54465331)/*"TFS1"*/ && - (sbi->part < 0 || sbi->part == i)) { - *part_start += be32_to_cpu(p->pdStart); - *part_size = be32_to_cpu(p->pdSize); - res = 0; - } - } + res = hfs_parse_old_pmap(sb, data, part_start, part_size); break; - } case HFS_NEW_PMAP_MAGIC: - { - struct new_pmap *pm; - - pm = (struct new_pmap *)bh->b_data; - size = be32_to_cpu(pm->pmMapBlkCnt); - for (i = 0; i < size;) { - if (!memcmp(pm->pmPartType,"Apple_HFS", 9) && - (sbi->part < 0 || sbi->part == i)) { - *part_start += be32_to_cpu(pm->pmPyPartStart); - *part_size = be32_to_cpu(pm->pmPartBlkCnt); - res = 0; - break; - } - brelse(bh); - bh = sb_bread512(sb, *part_start + HFS_PMAP_BLK + ++i, pm); - if (!bh) - return -EIO; - if (pm->pmSig != cpu_to_be16(HFS_NEW_PMAP_MAGIC)) - break; - } + res = hfs_parse_new_pmap(sb, data, part_start, part_size); + break; + default: + res = -ENOENT; break; - } } - brelse(bh); + kfree(data); return res; } diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index 9a88d75..6ee6ad2 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -10,6 +10,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/pagemap.h> +#include <linux/blkdev.h> #include <linux/fs.h> #include <linux/slab.h> #include <linux/vfs.h> @@ -66,6 +67,7 @@ struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); mutex_init(&HFSPLUS_I(inode)->extents_lock); HFSPLUS_I(inode)->flags = 0; + HFSPLUS_I(inode)->extent_state = 0; HFSPLUS_I(inode)->rsrc_inode = NULL; atomic_set(&HFSPLUS_I(inode)->opencnt, 0); @@ -157,45 +159,65 @@ int hfsplus_sync_fs(struct super_block *sb, int wait) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); struct hfsplus_vh *vhdr = sbi->s_vhdr; + int write_backup = 0; + int error, error2; + + if (!wait) + return 0; dprint(DBG_SUPER, "hfsplus_write_super\n"); - mutex_lock(&sbi->vh_mutex); - mutex_lock(&sbi->alloc_mutex); sb->s_dirt = 0; + /* + * Explicitly write out the special metadata inodes. + * + * While these special inodes are marked as hashed and written + * out peridocically by the flusher threads we redirty them + * during writeout of normal inodes, and thus the life lock + * prevents us from getting the latest state to disk. + */ + error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); + error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); + if (!error) + error = error2; + error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); + if (!error) + error = error2; + + mutex_lock(&sbi->vh_mutex); + mutex_lock(&sbi->alloc_mutex); vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); vhdr->folder_count = cpu_to_be32(sbi->folder_count); vhdr->file_count = cpu_to_be32(sbi->file_count); - mark_buffer_dirty(sbi->s_vhbh); if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { - if (sbi->sect_count) { - struct buffer_head *bh; - u32 block, offset; - - block = sbi->blockoffset; - block += (sbi->sect_count - 2) >> (sb->s_blocksize_bits - 9); - offset = ((sbi->sect_count - 2) << 9) & (sb->s_blocksize - 1); - printk(KERN_DEBUG "hfs: backup: %u,%u,%u,%u\n", - sbi->blockoffset, sbi->sect_count, - block, offset); - bh = sb_bread(sb, block); - if (bh) { - vhdr = (struct hfsplus_vh *)(bh->b_data + offset); - if (be16_to_cpu(vhdr->signature) == HFSPLUS_VOLHEAD_SIG) { - memcpy(vhdr, sbi->s_vhdr, sizeof(*vhdr)); - mark_buffer_dirty(bh); - brelse(bh); - } else - printk(KERN_WARNING "hfs: backup not found!\n"); - } - } + memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); + write_backup = 1; } + + error2 = hfsplus_submit_bio(sb->s_bdev, + sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, + sbi->s_vhdr, WRITE_SYNC); + if (!error) + error = error2; + if (!write_backup) + goto out; + + error2 = hfsplus_submit_bio(sb->s_bdev, + sbi->part_start + sbi->sect_count - 2, + sbi->s_backup_vhdr, WRITE_SYNC); + if (!error) + error2 = error; +out: mutex_unlock(&sbi->alloc_mutex); mutex_unlock(&sbi->vh_mutex); - return 0; + + if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) + blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); + + return error; } static void hfsplus_write_super(struct super_block *sb) @@ -215,23 +237,22 @@ static void hfsplus_put_super(struct super_block *sb) if (!sb->s_fs_info) return; - if (sb->s_dirt) - hfsplus_write_super(sb); if (!(sb->s_flags & MS_RDONLY) && sbi->s_vhdr) { struct hfsplus_vh *vhdr = sbi->s_vhdr; vhdr->modify_date = hfsp_now2mt(); vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); - mark_buffer_dirty(sbi->s_vhbh); - sync_dirty_buffer(sbi->s_vhbh); + + hfsplus_sync_fs(sb, 1); } hfs_btree_close(sbi->cat_tree); hfs_btree_close(sbi->ext_tree); iput(sbi->alloc_file); iput(sbi->hidden_dir); - brelse(sbi->s_vhbh); + kfree(sbi->s_vhdr); + kfree(sbi->s_backup_vhdr); unload_nls(sbi->nls); kfree(sb->s_fs_info); sb->s_fs_info = NULL; @@ -263,26 +284,31 @@ static int hfsplus_remount(struct super_block *sb, int *flags, char *data) return 0; if (!(*flags & MS_RDONLY)) { struct hfsplus_vh *vhdr = HFSPLUS_SB(sb)->s_vhdr; - struct hfsplus_sb_info sbi; + int force = 0; - memset(&sbi, 0, sizeof(struct hfsplus_sb_info)); - sbi.nls = HFSPLUS_SB(sb)->nls; - if (!hfsplus_parse_options(data, &sbi)) + if (!hfsplus_parse_options_remount(data, &force)) return -EINVAL; if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { - printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " - "running fsck.hfsplus is recommended. leaving read-only.\n"); + printk(KERN_WARNING "hfs: filesystem was " + "not cleanly unmounted, " + "running fsck.hfsplus is recommended. " + "leaving read-only.\n"); sb->s_flags |= MS_RDONLY; *flags |= MS_RDONLY; - } else if (test_bit(HFSPLUS_SB_FORCE, &sbi.flags)) { + } else if (force) { /* nothing */ - } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { - printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); + } else if (vhdr->attributes & + cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { + printk(KERN_WARNING "hfs: filesystem is marked locked, " + "leaving read-only.\n"); sb->s_flags |= MS_RDONLY; *flags |= MS_RDONLY; - } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { - printk(KERN_WARNING "hfs: filesystem is marked journaled, leaving read-only.\n"); + } else if (vhdr->attributes & + cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { + printk(KERN_WARNING "hfs: filesystem is " + "marked journaled, " + "leaving read-only.\n"); sb->s_flags |= MS_RDONLY; *flags |= MS_RDONLY; } @@ -372,17 +398,22 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) sb->s_maxbytes = MAX_LFS_FILESIZE; if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { - printk(KERN_WARNING "hfs: Filesystem was not cleanly unmounted, " - "running fsck.hfsplus is recommended. mounting read-only.\n"); + printk(KERN_WARNING "hfs: Filesystem was " + "not cleanly unmounted, " + "running fsck.hfsplus is recommended. " + "mounting read-only.\n"); sb->s_flags |= MS_RDONLY; } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { /* nothing */ } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { printk(KERN_WARNING "hfs: Filesystem is marked locked, mounting read-only.\n"); sb->s_flags |= MS_RDONLY; - } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !(sb->s_flags & MS_RDONLY)) { - printk(KERN_WARNING "hfs: write access to a journaled filesystem is not supported, " - "use the force option at your own risk, mounting read-only.\n"); + } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && + !(sb->s_flags & MS_RDONLY)) { + printk(KERN_WARNING "hfs: write access to " + "a journaled filesystem is not supported, " + "use the force option at your own risk, " + "mounting read-only.\n"); sb->s_flags |= MS_RDONLY; } @@ -419,7 +450,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) err = -ENOMEM; goto cleanup; } - sb->s_root->d_op = &hfsplus_dentry_operations; + d_set_d_op(sb->s_root, &hfsplus_dentry_operations); str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; str.name = HFSP_HIDDENDIR_NAME; @@ -449,19 +480,16 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) be32_add_cpu(&vhdr->write_count, 1); vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); - mark_buffer_dirty(sbi->s_vhbh); - sync_dirty_buffer(sbi->s_vhbh); + hfsplus_sync_fs(sb, 1); if (!sbi->hidden_dir) { - printk(KERN_DEBUG "hfs: create hidden dir...\n"); - mutex_lock(&sbi->vh_mutex); sbi->hidden_dir = hfsplus_new_inode(sb, S_IFDIR); hfsplus_create_cat(sbi->hidden_dir->i_ino, sb->s_root->d_inode, &str, sbi->hidden_dir); mutex_unlock(&sbi->vh_mutex); - mark_inode_dirty(sbi->hidden_dir); + hfsplus_mark_inode_dirty(sbi->hidden_dir, HFSPLUS_I_CAT_DIRTY); } out: unload_nls(sbi->nls); @@ -488,25 +516,31 @@ static struct inode *hfsplus_alloc_inode(struct super_block *sb) return i ? &i->vfs_inode : NULL; } -static void hfsplus_destroy_inode(struct inode *inode) +static void hfsplus_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); } +static void hfsplus_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, hfsplus_i_callback); +} + #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) -static int hfsplus_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *hfsplus_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, hfsplus_fill_super); } static struct file_system_type hfsplus_fs_type = { .owner = THIS_MODULE, .name = "hfsplus", - .get_sb = hfsplus_get_sb, + .mount = hfsplus_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c index b66d67d..a3f0bfc 100644 --- a/fs/hfsplus/unicode.c +++ b/fs/hfsplus/unicode.c @@ -17,14 +17,14 @@ /* Returns folded char, or 0 if ignorable */ static inline u16 case_fold(u16 c) { - u16 tmp; - - tmp = hfsplus_case_fold_table[c >> 8]; - if (tmp) - tmp = hfsplus_case_fold_table[tmp + (c & 0xff)]; - else - tmp = c; - return tmp; + u16 tmp; + + tmp = hfsplus_case_fold_table[c >> 8]; + if (tmp) + tmp = hfsplus_case_fold_table[tmp + (c & 0xff)]; + else + tmp = c; + return tmp; } /* Compare unicode strings, return values like normal strcmp */ @@ -118,7 +118,9 @@ static u16 *hfsplus_compose_lookup(u16 *p, u16 cc) return NULL; } -int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, char *astr, int *len_p) +int hfsplus_uni2asc(struct super_block *sb, + const struct hfsplus_unistr *ustr, + char *astr, int *len_p) { const hfsplus_unichr *ip; struct nls_table *nls = HFSPLUS_SB(sb)->nls; @@ -171,7 +173,8 @@ int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, c goto same; c1 = be16_to_cpu(*ip); if (likely(compose)) - ce1 = hfsplus_compose_lookup(hfsplus_compose_table, c1); + ce1 = hfsplus_compose_lookup( + hfsplus_compose_table, c1); if (ce1) break; switch (c0) { @@ -199,7 +202,8 @@ int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, c if (ce2) { i = 1; while (i < ustrlen) { - ce1 = hfsplus_compose_lookup(ce2, be16_to_cpu(ip[i])); + ce1 = hfsplus_compose_lookup(ce2, + be16_to_cpu(ip[i])); if (!ce1) break; i++; @@ -211,7 +215,7 @@ int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, c goto done; } } - same: +same: switch (c0) { case 0: cc = 0x2400; @@ -222,7 +226,7 @@ int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, c default: cc = c0; } - done: +done: res = nls->uni2char(cc, op, len); if (res < 0) { if (res == -ENAMETOOLONG) @@ -320,7 +324,8 @@ int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, * Composed unicode characters are decomposed and case-folding is performed * if the appropriate bits are (un)set on the superblock. */ -int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str) +int hfsplus_hash_dentry(const struct dentry *dentry, const struct inode *inode, + struct qstr *str) { struct super_block *sb = dentry->d_sb; const char *astr; @@ -363,9 +368,12 @@ int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str) * Composed unicode characters are decomposed and case-folding is performed * if the appropriate bits are (un)set on the superblock. */ -int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2) +int hfsplus_compare_dentry(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - struct super_block *sb = dentry->d_sb; + struct super_block *sb = parent->d_sb; int casefold, decompose, size; int dsize1, dsize2, len1, len2; const u16 *dstr1, *dstr2; @@ -375,10 +383,10 @@ int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr * casefold = test_bit(HFSPLUS_SB_CASEFOLD, &HFSPLUS_SB(sb)->flags); decompose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags); - astr1 = s1->name; - len1 = s1->len; - astr2 = s2->name; - len2 = s2->len; + astr1 = str; + len1 = len; + astr2 = name->name; + len2 = name->len; dsize1 = dsize2 = 0; dstr1 = dstr2 = NULL; @@ -388,7 +396,9 @@ int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr * astr1 += size; len1 -= size; - if (!decompose || !(dstr1 = decompose_unichar(c, &dsize1))) { + if (decompose) + dstr1 = decompose_unichar(c, &dsize1); + if (!decompose || !dstr1) { c1 = c; dstr1 = &c1; dsize1 = 1; @@ -400,7 +410,9 @@ int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr * astr2 += size; len2 -= size; - if (!decompose || !(dstr2 = decompose_unichar(c, &dsize2))) { + if (decompose) + dstr2 = decompose_unichar(c, &dsize2); + if (!decompose || !dstr2) { c2 = c; dstr2 = &c2; dsize2 = 1; diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c index 8972c20..1962317 100644 --- a/fs/hfsplus/wrapper.c +++ b/fs/hfsplus/wrapper.c @@ -24,6 +24,40 @@ struct hfsplus_wd { u16 embed_count; }; +static void hfsplus_end_io_sync(struct bio *bio, int err) +{ + if (err) + clear_bit(BIO_UPTODATE, &bio->bi_flags); + complete(bio->bi_private); +} + +int hfsplus_submit_bio(struct block_device *bdev, sector_t sector, + void *data, int rw) +{ + DECLARE_COMPLETION_ONSTACK(wait); + struct bio *bio; + + bio = bio_alloc(GFP_NOIO, 1); + bio->bi_sector = sector; + bio->bi_bdev = bdev; + bio->bi_end_io = hfsplus_end_io_sync; + bio->bi_private = &wait; + + /* + * We always submit one sector at a time, so bio_add_page must not fail. + */ + if (bio_add_page(bio, virt_to_page(data), HFSPLUS_SECTOR_SIZE, + offset_in_page(data)) != HFSPLUS_SECTOR_SIZE) + BUG(); + + submit_bio(rw, bio); + wait_for_completion(&wait); + + if (!bio_flagged(bio, BIO_UPTODATE)) + return -EIO; + return 0; +} + static int hfsplus_read_mdb(void *bufptr, struct hfsplus_wd *wd) { u32 extent; @@ -40,12 +74,14 @@ static int hfsplus_read_mdb(void *bufptr, struct hfsplus_wd *wd) !(attrib & HFSP_WRAP_ATTRIB_SPARED)) return 0; - wd->ablk_size = be32_to_cpu(*(__be32 *)(bufptr + HFSP_WRAPOFF_ABLKSIZE)); + wd->ablk_size = + be32_to_cpu(*(__be32 *)(bufptr + HFSP_WRAPOFF_ABLKSIZE)); if (wd->ablk_size < HFSPLUS_SECTOR_SIZE) return 0; if (wd->ablk_size % HFSPLUS_SECTOR_SIZE) return 0; - wd->ablk_start = be16_to_cpu(*(__be16 *)(bufptr + HFSP_WRAPOFF_ABLKSTART)); + wd->ablk_start = + be16_to_cpu(*(__be16 *)(bufptr + HFSP_WRAPOFF_ABLKSTART)); extent = get_unaligned_be32(bufptr + HFSP_WRAPOFF_EMBEDEXT); wd->embed_start = (extent >> 16) & 0xFFFF; @@ -68,7 +104,8 @@ static int hfsplus_get_last_session(struct super_block *sb, if (HFSPLUS_SB(sb)->session >= 0) { te.cdte_track = HFSPLUS_SB(sb)->session; te.cdte_format = CDROM_LBA; - res = ioctl_by_bdev(sb->s_bdev, CDROMREADTOCENTRY, (unsigned long)&te); + res = ioctl_by_bdev(sb->s_bdev, + CDROMREADTOCENTRY, (unsigned long)&te); if (!res && (te.cdte_ctrl & CDROM_DATA_TRACK) == 4) { *start = (sector_t)te.cdte_addr.lba << 2; return 0; @@ -77,7 +114,8 @@ static int hfsplus_get_last_session(struct super_block *sb, return -EINVAL; } ms_info.addr_format = CDROM_LBA; - res = ioctl_by_bdev(sb->s_bdev, CDROMMULTISESSION, (unsigned long)&ms_info); + res = ioctl_by_bdev(sb->s_bdev, CDROMMULTISESSION, + (unsigned long)&ms_info); if (!res && ms_info.xa_flag) *start = (sector_t)ms_info.addr.lba << 2; return 0; @@ -88,100 +126,112 @@ static int hfsplus_get_last_session(struct super_block *sb, int hfsplus_read_wrapper(struct super_block *sb) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); - struct buffer_head *bh; - struct hfsplus_vh *vhdr; struct hfsplus_wd wd; sector_t part_start, part_size; u32 blocksize; + int error = 0; + error = -EINVAL; blocksize = sb_min_blocksize(sb, HFSPLUS_SECTOR_SIZE); if (!blocksize) - return -EINVAL; + goto out; if (hfsplus_get_last_session(sb, &part_start, &part_size)) - return -EINVAL; + goto out; if ((u64)part_start + part_size > 0x100000000ULL) { pr_err("hfs: volumes larger than 2TB are not supported yet\n"); - return -EINVAL; + goto out; } - while (1) { - bh = sb_bread512(sb, part_start + HFSPLUS_VOLHEAD_SECTOR, vhdr); - if (!bh) - return -EIO; - - if (vhdr->signature == cpu_to_be16(HFSP_WRAP_MAGIC)) { - if (!hfsplus_read_mdb(vhdr, &wd)) - goto error; - wd.ablk_size >>= HFSPLUS_SECTOR_SHIFT; - part_start += wd.ablk_start + wd.embed_start * wd.ablk_size; - part_size = wd.embed_count * wd.ablk_size; - brelse(bh); - bh = sb_bread512(sb, part_start + HFSPLUS_VOLHEAD_SECTOR, vhdr); - if (!bh) - return -EIO; - } - if (vhdr->signature == cpu_to_be16(HFSPLUS_VOLHEAD_SIG)) - break; - if (vhdr->signature == cpu_to_be16(HFSPLUS_VOLHEAD_SIGX)) { - set_bit(HFSPLUS_SB_HFSX, &sbi->flags); - break; - } - brelse(bh); - /* check for a partition block + error = -ENOMEM; + sbi->s_vhdr = kmalloc(HFSPLUS_SECTOR_SIZE, GFP_KERNEL); + if (!sbi->s_vhdr) + goto out; + sbi->s_backup_vhdr = kmalloc(HFSPLUS_SECTOR_SIZE, GFP_KERNEL); + if (!sbi->s_backup_vhdr) + goto out_free_vhdr; + +reread: + error = hfsplus_submit_bio(sb->s_bdev, + part_start + HFSPLUS_VOLHEAD_SECTOR, + sbi->s_vhdr, READ); + if (error) + goto out_free_backup_vhdr; + + error = -EINVAL; + switch (sbi->s_vhdr->signature) { + case cpu_to_be16(HFSPLUS_VOLHEAD_SIGX): + set_bit(HFSPLUS_SB_HFSX, &sbi->flags); + /*FALLTHRU*/ + case cpu_to_be16(HFSPLUS_VOLHEAD_SIG): + break; + case cpu_to_be16(HFSP_WRAP_MAGIC): + if (!hfsplus_read_mdb(sbi->s_vhdr, &wd)) + goto out; + wd.ablk_size >>= HFSPLUS_SECTOR_SHIFT; + part_start += wd.ablk_start + wd.embed_start * wd.ablk_size; + part_size = wd.embed_count * wd.ablk_size; + goto reread; + default: + /* + * Check for a partition block. + * * (should do this only for cdrom/loop though) */ if (hfs_part_find(sb, &part_start, &part_size)) - return -EINVAL; + goto out; + goto reread; + } + + error = hfsplus_submit_bio(sb->s_bdev, + part_start + part_size - 2, + sbi->s_backup_vhdr, READ); + if (error) + goto out_free_backup_vhdr; + + error = -EINVAL; + if (sbi->s_backup_vhdr->signature != sbi->s_vhdr->signature) { + printk(KERN_WARNING + "hfs: invalid secondary volume header\n"); + goto out_free_backup_vhdr; } - blocksize = be32_to_cpu(vhdr->blocksize); - brelse(bh); + blocksize = be32_to_cpu(sbi->s_vhdr->blocksize); - /* block size must be at least as large as a sector - * and a multiple of 2 + /* + * Block size must be at least as large as a sector and a multiple of 2. */ - if (blocksize < HFSPLUS_SECTOR_SIZE || - ((blocksize - 1) & blocksize)) - return -EINVAL; + if (blocksize < HFSPLUS_SECTOR_SIZE || ((blocksize - 1) & blocksize)) + goto out_free_backup_vhdr; sbi->alloc_blksz = blocksize; sbi->alloc_blksz_shift = 0; while ((blocksize >>= 1) != 0) sbi->alloc_blksz_shift++; blocksize = min(sbi->alloc_blksz, (u32)PAGE_SIZE); - /* align block size to block offset */ + /* + * Align block size to block offset. + */ while (part_start & ((blocksize >> HFSPLUS_SECTOR_SHIFT) - 1)) blocksize >>= 1; if (sb_set_blocksize(sb, blocksize) != blocksize) { - printk(KERN_ERR "hfs: unable to set blocksize to %u!\n", blocksize); - return -EINVAL; + printk(KERN_ERR "hfs: unable to set blocksize to %u!\n", + blocksize); + goto out_free_backup_vhdr; } sbi->blockoffset = part_start >> (sb->s_blocksize_bits - HFSPLUS_SECTOR_SHIFT); + sbi->part_start = part_start; sbi->sect_count = part_size; sbi->fs_shift = sbi->alloc_blksz_shift - sb->s_blocksize_bits; - - bh = sb_bread512(sb, part_start + HFSPLUS_VOLHEAD_SECTOR, vhdr); - if (!bh) - return -EIO; - - /* should still be the same... */ - if (test_bit(HFSPLUS_SB_HFSX, &sbi->flags)) { - if (vhdr->signature != cpu_to_be16(HFSPLUS_VOLHEAD_SIGX)) - goto error; - } else { - if (vhdr->signature != cpu_to_be16(HFSPLUS_VOLHEAD_SIG)) - goto error; - } - - sbi->s_vhbh = bh; - sbi->s_vhdr = vhdr; - return 0; - error: - brelse(bh); - return -EINVAL; + +out_free_backup_vhdr: + kfree(sbi->s_backup_vhdr); +out_free_vhdr: + kfree(sbi->s_vhdr); +out: + return error; } diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c index cd7c939..d3244d9 100644 --- a/fs/hostfs/hostfs_kern.c +++ b/fs/hostfs/hostfs_kern.c @@ -32,7 +32,7 @@ static inline struct hostfs_inode_info *HOSTFS_I(struct inode *inode) #define FILE_HOSTFS_I(file) HOSTFS_I((file)->f_path.dentry->d_inode) -static int hostfs_d_delete(struct dentry *dentry) +static int hostfs_d_delete(const struct dentry *dentry) { return 1; } @@ -92,12 +92,10 @@ __uml_setup("hostfs=", hostfs_args, static char *__dentry_name(struct dentry *dentry, char *name) { - char *p = __dentry_path(dentry, name, PATH_MAX); + char *p = dentry_path_raw(dentry, name, PATH_MAX); char *root; size_t len; - spin_unlock(&dcache_lock); - root = dentry->d_sb->s_fs_info; len = strlen(root); if (IS_ERR(p)) { @@ -123,25 +121,23 @@ static char *dentry_name(struct dentry *dentry) if (!name) return NULL; - spin_lock(&dcache_lock); return __dentry_name(dentry, name); /* will unlock */ } static char *inode_name(struct inode *ino) { struct dentry *dentry; - char *name = __getname(); - if (!name) - return NULL; + char *name; - spin_lock(&dcache_lock); - if (list_empty(&ino->i_dentry)) { - spin_unlock(&dcache_lock); - __putname(name); + dentry = d_find_alias(ino); + if (!dentry) return NULL; - } - dentry = list_first_entry(&ino->i_dentry, struct dentry, d_alias); - return __dentry_name(dentry, name); /* will unlock */ + + name = dentry_name(dentry); + + dput(dentry); + + return name; } static char *follow_link(char *link) @@ -251,11 +247,18 @@ static void hostfs_evict_inode(struct inode *inode) } } -static void hostfs_destroy_inode(struct inode *inode) +static void hostfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kfree(HOSTFS_I(inode)); } +static void hostfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, hostfs_i_callback); +} + static int hostfs_show_options(struct seq_file *seq, struct vfsmount *vfs) { const char *root_path = vfs->mnt_sb->s_fs_info; @@ -609,7 +612,7 @@ struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry, goto out_put; d_add(dentry, inode); - dentry->d_op = &hostfs_dentry_ops; + d_set_d_op(dentry, &hostfs_dentry_ops); return NULL; out_put: @@ -746,11 +749,14 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from, return err; } -int hostfs_permission(struct inode *ino, int desired) +int hostfs_permission(struct inode *ino, int desired, unsigned int flags) { char *name; int r = 0, w = 0, x = 0, err; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + if (desired & MAY_READ) r = 1; if (desired & MAY_WRITE) w = 1; if (desired & MAY_EXEC) x = 1; @@ -765,7 +771,7 @@ int hostfs_permission(struct inode *ino, int desired) err = access_file(name, r, w, x); __putname(name); if (!err) - err = generic_permission(ino, desired, NULL); + err = generic_permission(ino, desired, flags, NULL); return err; } @@ -962,11 +968,11 @@ out: return err; } -static int hostfs_read_sb(struct file_system_type *type, +static struct dentry *hostfs_read_sb(struct file_system_type *type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_nodev(type, flags, data, hostfs_fill_sb_common, mnt); + return mount_nodev(type, flags, data, hostfs_fill_sb_common); } static void hostfs_kill_sb(struct super_block *s) @@ -978,7 +984,7 @@ static void hostfs_kill_sb(struct super_block *s) static struct file_system_type hostfs_type = { .owner = THIS_MODULE, .name = "hostfs", - .get_sb = hostfs_read_sb, + .mount = hostfs_read_sb, .kill_sb = hostfs_kill_sb, .fs_flags = 0, }; diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c index eac5f96..793cb9d 100644 --- a/fs/hpfs/buffer.c +++ b/fs/hpfs/buffer.c @@ -14,7 +14,7 @@ void hpfs_lock_creation(struct super_block *s) #ifdef DEBUG_LOCKS printk("lock creation\n"); #endif - down(&hpfs_sb(s)->hpfs_creation_de); + mutex_lock(&hpfs_sb(s)->hpfs_creation_de); } void hpfs_unlock_creation(struct super_block *s) @@ -22,7 +22,7 @@ void hpfs_unlock_creation(struct super_block *s) #ifdef DEBUG_LOCKS printk("unlock creation\n"); #endif - up(&hpfs_sb(s)->hpfs_creation_de); + mutex_unlock(&hpfs_sb(s)->hpfs_creation_de); } /* Map a sector into a buffer and return pointers to it and to the buffer. */ diff --git a/fs/hpfs/dentry.c b/fs/hpfs/dentry.c index 67d9d36..32c13a9 100644 --- a/fs/hpfs/dentry.c +++ b/fs/hpfs/dentry.c @@ -12,7 +12,8 @@ * Note: the dentry argument is the parent dentry. */ -static int hpfs_hash_dentry(struct dentry *dentry, struct qstr *qstr) +static int hpfs_hash_dentry(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { unsigned long hash; int i; @@ -34,19 +35,25 @@ static int hpfs_hash_dentry(struct dentry *dentry, struct qstr *qstr) return 0; } -static int hpfs_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) +static int hpfs_compare_dentry(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - unsigned al=a->len; - unsigned bl=b->len; - hpfs_adjust_length(a->name, &al); + unsigned al = len; + unsigned bl = name->len; + + hpfs_adjust_length(str, &al); /*hpfs_adjust_length(b->name, &bl);*/ - /* 'a' is the qstr of an already existing dentry, so the name - * must be valid. 'b' must be validated first. + + /* + * 'str' is the nane of an already existing dentry, so the name + * must be valid. 'name' must be validated first. */ - if (hpfs_chk_name(b->name, &bl)) + if (hpfs_chk_name(name->name, &bl)) return 1; - if (hpfs_compare_names(dentry->d_sb, a->name, al, b->name, bl, 0)) + if (hpfs_compare_names(parent->d_sb, str, al, name->name, bl, 0)) return 1; return 0; } @@ -58,5 +65,5 @@ static const struct dentry_operations hpfs_dentry_operations = { void hpfs_set_dentry_operations(struct dentry *dentry) { - dentry->d_op = &hpfs_dentry_operations; + d_set_d_op(dentry, &hpfs_dentry_operations); } diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h index b59eac0..2fee17d 100644 --- a/fs/hpfs/hpfs_fn.h +++ b/fs/hpfs/hpfs_fn.h @@ -87,7 +87,7 @@ struct hpfs_sb_info { unsigned *sb_bmp_dir; /* main bitmap directory */ unsigned sb_c_bitmap; /* current bitmap */ unsigned sb_max_fwd_alloc; /* max forwad allocation */ - struct semaphore hpfs_creation_de; /* when creating dirents, nobody else + struct mutex hpfs_creation_de; /* when creating dirents, nobody else can alloc blocks */ /*unsigned sb_mounting : 1;*/ int sb_timeshift; diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c index 11c2b40..f4ad9e3 100644 --- a/fs/hpfs/namei.c +++ b/fs/hpfs/namei.c @@ -419,7 +419,7 @@ again: unlock_kernel(); return -ENOSPC; } - if (generic_permission(inode, MAY_WRITE, NULL) || + if (generic_permission(inode, MAY_WRITE, 0, NULL) || !S_ISREG(inode->i_mode) || get_write_access(inode)) { d_rehash(dentry); diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index c969a1a..49935ba 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -177,11 +177,18 @@ static struct inode *hpfs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void hpfs_destroy_inode(struct inode *inode) +static void hpfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); } +static void hpfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, hpfs_i_callback); +} + static void init_once(void *foo) { struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; @@ -491,7 +498,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent) sbi->sb_bmp_dir = NULL; sbi->sb_cp_table = NULL; - init_MUTEX(&sbi->hpfs_creation_de); + mutex_init(&sbi->hpfs_creation_de); uid = current_uid(); gid = current_gid(); @@ -686,17 +693,16 @@ bail0: return -EINVAL; } -static int hpfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *hpfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, hpfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); } static struct file_system_type hpfs_fs_type = { .owner = THIS_MODULE, .name = "hpfs", - .get_sb = hpfs_get_sb, + .mount = hpfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c index 4e2a45e..87ed48e 100644 --- a/fs/hppfs/hppfs.c +++ b/fs/hppfs/hppfs.c @@ -632,11 +632,18 @@ void hppfs_evict_inode(struct inode *ino) mntput(ino->i_sb->s_fs_info); } -static void hppfs_destroy_inode(struct inode *inode) +static void hppfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kfree(HPPFS_I(inode)); } +static void hppfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, hppfs_i_callback); +} + static const struct super_operations hppfs_sbops = { .alloc_inode = hppfs_alloc_inode, .destroy_inode = hppfs_destroy_inode, @@ -748,17 +755,17 @@ static int hppfs_fill_super(struct super_block *sb, void *d, int silent) return(err); } -static int hppfs_read_super(struct file_system_type *type, +static struct dentry *hppfs_read_super(struct file_system_type *type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_nodev(type, flags, data, hppfs_fill_super, mnt); + return mount_nodev(type, flags, data, hppfs_fill_super); } static struct file_system_type hppfs_type = { .owner = THIS_MODULE, .name = "hppfs", - .get_sb = hppfs_read_super, + .mount = hppfs_read_super, .kill_sb = kill_anon_super, .fs_flags = 0, }; diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index b14be3f..9885082 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -663,11 +663,18 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb) return &p->vfs_inode; } +static void hugetlbfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode)); +} + static void hugetlbfs_destroy_inode(struct inode *inode) { hugetlbfs_inc_free_inodes(HUGETLBFS_SB(inode->i_sb)); mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy); - kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode)); + call_rcu(&inode->i_rcu, hugetlbfs_i_callback); } static const struct address_space_operations hugetlbfs_aops = { @@ -896,15 +903,15 @@ void hugetlb_put_quota(struct address_space *mapping, long delta) } } -static int hugetlbfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags, data, hugetlbfs_fill_super, mnt); + return mount_nodev(fs_type, flags, data, hugetlbfs_fill_super); } static struct file_system_type hugetlbfs_fs_type = { .name = "hugetlbfs", - .get_sb = hugetlbfs_get_sb, + .mount = hugetlbfs_mount, .kill_sb = kill_litter_super, }; @@ -932,8 +939,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag, if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) { *user = current_user(); if (user_shm_lock(size, *user)) { - WARN_ONCE(1, - "Using mlock ulimits for SHM_HUGETLB deprecated\n"); + printk_once(KERN_WARNING "Using mlock ulimits for SHM_HUGETLB is deprecated\n"); } else { *user = NULL; return ERR_PTR(-EPERM); @@ -102,26 +102,29 @@ static DECLARE_RWSEM(iprune_sem); */ struct inodes_stat_t inodes_stat; -static struct percpu_counter nr_inodes __cacheline_aligned_in_smp; -static struct percpu_counter nr_inodes_unused __cacheline_aligned_in_smp; +static DEFINE_PER_CPU(unsigned int, nr_inodes); static struct kmem_cache *inode_cachep __read_mostly; -static inline int get_nr_inodes(void) +static int get_nr_inodes(void) { - return percpu_counter_sum_positive(&nr_inodes); + int i; + int sum = 0; + for_each_possible_cpu(i) + sum += per_cpu(nr_inodes, i); + return sum < 0 ? 0 : sum; } static inline int get_nr_inodes_unused(void) { - return percpu_counter_sum_positive(&nr_inodes_unused); + return inodes_stat.nr_unused; } int get_nr_dirty_inodes(void) { + /* not actually dirty inodes, but a wild approximation */ int nr_dirty = get_nr_inodes() - get_nr_inodes_unused(); return nr_dirty > 0 ? nr_dirty : 0; - } /* @@ -132,7 +135,6 @@ int proc_nr_inodes(ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { inodes_stat.nr_inodes = get_nr_inodes(); - inodes_stat.nr_unused = get_nr_inodes_unused(); return proc_dointvec(table, write, buffer, lenp, ppos); } #endif @@ -224,7 +226,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_fsnotify_mask = 0; #endif - percpu_counter_inc(&nr_inodes); + this_cpu_inc(nr_inodes); return 0; out: @@ -255,6 +257,12 @@ static struct inode *alloc_inode(struct super_block *sb) return inode; } +void free_inode_nonrcu(struct inode *inode) +{ + kmem_cache_free(inode_cachep, inode); +} +EXPORT_SYMBOL(free_inode_nonrcu); + void __destroy_inode(struct inode *inode) { BUG_ON(inode_has_buffers(inode)); @@ -266,10 +274,17 @@ void __destroy_inode(struct inode *inode) if (inode->i_default_acl && inode->i_default_acl != ACL_NOT_CACHED) posix_acl_release(inode->i_default_acl); #endif - percpu_counter_dec(&nr_inodes); + this_cpu_dec(nr_inodes); } EXPORT_SYMBOL(__destroy_inode); +static void i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(inode_cachep, inode); +} + static void destroy_inode(struct inode *inode) { BUG_ON(!list_empty(&inode->i_lru)); @@ -277,7 +292,7 @@ static void destroy_inode(struct inode *inode) if (inode->i_sb->s_op->destroy_inode) inode->i_sb->s_op->destroy_inode(inode); else - kmem_cache_free(inode_cachep, (inode)); + call_rcu(&inode->i_rcu, i_callback); } /* @@ -335,7 +350,7 @@ static void inode_lru_list_add(struct inode *inode) { if (list_empty(&inode->i_lru)) { list_add(&inode->i_lru, &inode_lru); - percpu_counter_inc(&nr_inodes_unused); + inodes_stat.nr_unused++; } } @@ -343,7 +358,7 @@ static void inode_lru_list_del(struct inode *inode) { if (!list_empty(&inode->i_lru)) { list_del_init(&inode->i_lru); - percpu_counter_dec(&nr_inodes_unused); + inodes_stat.nr_unused--; } } @@ -430,6 +445,7 @@ void end_writeback(struct inode *inode) BUG_ON(!(inode->i_state & I_FREEING)); BUG_ON(inode->i_state & I_CLEAR); inode_sync_wait(inode); + /* don't need i_lock here, no concurrent mods to i_state */ inode->i_state = I_FREEING | I_CLEAR; } EXPORT_SYMBOL(end_writeback); @@ -513,7 +529,7 @@ void evict_inodes(struct super_block *sb) list_move(&inode->i_lru, &dispose); list_del_init(&inode->i_wb_list); if (!(inode->i_state & (I_DIRTY | I_SYNC))) - percpu_counter_dec(&nr_inodes_unused); + inodes_stat.nr_unused--; } spin_unlock(&inode_lock); @@ -554,7 +570,7 @@ int invalidate_inodes(struct super_block *sb) list_move(&inode->i_lru, &dispose); list_del_init(&inode->i_wb_list); if (!(inode->i_state & (I_DIRTY | I_SYNC))) - percpu_counter_dec(&nr_inodes_unused); + inodes_stat.nr_unused--; } spin_unlock(&inode_lock); @@ -616,7 +632,7 @@ static void prune_icache(int nr_to_scan) if (atomic_read(&inode->i_count) || (inode->i_state & ~I_REFERENCED)) { list_del_init(&inode->i_lru); - percpu_counter_dec(&nr_inodes_unused); + inodes_stat.nr_unused--; continue; } @@ -650,7 +666,7 @@ static void prune_icache(int nr_to_scan) */ list_move(&inode->i_lru, &freeable); list_del_init(&inode->i_wb_list); - percpu_counter_dec(&nr_inodes_unused); + inodes_stat.nr_unused--; } if (current_is_kswapd()) __count_vm_events(KSWAPD_INODESTEAL, reap); @@ -1648,8 +1664,6 @@ void __init inode_init(void) SLAB_MEM_SPREAD), init_once); register_shrinker(&icache_shrinker); - percpu_counter_init(&nr_inodes, 0); - percpu_counter_init(&nr_inodes_unused, 0); /* Hash may have been set up in inode_init_early */ if (!hashdist) diff --git a/fs/internal.h b/fs/internal.h index ebad3b9..9687c2e 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -63,6 +63,7 @@ extern int copy_mount_string(const void __user *, char **); extern void free_vfsmnt(struct vfsmount *); extern struct vfsmount *alloc_vfsmnt(const char *); +extern unsigned int mnt_get_count(struct vfsmount *mnt); extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int); extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *, struct vfsmount *); @@ -106,5 +107,5 @@ extern void release_open_intent(struct nameidata *); * inode.c */ extern int get_nr_dirty_inodes(void); -extern int evict_inodes(struct super_block *); +extern void evict_inodes(struct super_block *); extern int invalidate_inodes(struct super_block *); @@ -6,7 +6,6 @@ #include <linux/syscalls.h> #include <linux/mm.h> -#include <linux/smp_lock.h> #include <linux/capability.h> #include <linux/file.h> #include <linux/fs.h> @@ -530,41 +529,6 @@ static int ioctl_fsthaw(struct file *filp) return thaw_super(sb); } -static int ioctl_fstrim(struct file *filp, void __user *argp) -{ - struct super_block *sb = filp->f_path.dentry->d_inode->i_sb; - struct fstrim_range range; - int ret = 0; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - /* If filesystem doesn't support trim feature, return. */ - if (sb->s_op->trim_fs == NULL) - return -EOPNOTSUPP; - - /* If a blockdevice-backed filesystem isn't specified, return EINVAL. */ - if (sb->s_bdev == NULL) - return -EINVAL; - - if (argp == NULL) { - range.start = 0; - range.len = ULLONG_MAX; - range.minlen = 0; - } else if (copy_from_user(&range, argp, sizeof(range))) - return -EFAULT; - - ret = sb->s_op->trim_fs(sb, &range); - if (ret < 0) - return ret; - - if ((argp != NULL) && - (copy_to_user(argp, &range, sizeof(range)))) - return -EFAULT; - - return 0; -} - /* * When you add any new common ioctls to the switches above and below * please update compat_sys_ioctl() too. @@ -615,10 +579,6 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, error = ioctl_fsthaw(filp); break; - case FITRIM: - error = ioctl_fstrim(filp, argp); - break; - case FS_IOC_FIEMAP: return ioctl_fiemap(filp, arg); diff --git a/fs/ioprio.c b/fs/ioprio.c index 748cfb9..7da2a06 100644 --- a/fs/ioprio.c +++ b/fs/ioprio.c @@ -103,12 +103,7 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio) } ret = -ESRCH; - /* - * We want IOPRIO_WHO_PGRP/IOPRIO_WHO_USER to be "atomic", - * so we can't use rcu_read_lock(). See re-copy of ->ioprio - * in copy_process(). - */ - read_lock(&tasklist_lock); + rcu_read_lock(); switch (which) { case IOPRIO_WHO_PROCESS: if (!who) @@ -153,7 +148,7 @@ free_uid: ret = -EINVAL; } - read_unlock(&tasklist_lock); + rcu_read_unlock(); return ret; } @@ -197,7 +192,7 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who) int ret = -ESRCH; int tmpio; - read_lock(&tasklist_lock); + rcu_read_lock(); switch (which) { case IOPRIO_WHO_PROCESS: if (!who) @@ -250,6 +245,6 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who) ret = -EINVAL; } - read_unlock(&tasklist_lock); + rcu_read_unlock(); return ret; } diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index 79cf7f61..844a790 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -26,16 +26,32 @@ #define BEQUIET -static int isofs_hashi(struct dentry *parent, struct qstr *qstr); -static int isofs_hash(struct dentry *parent, struct qstr *qstr); -static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b); -static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b); +static int isofs_hashi(const struct dentry *parent, const struct inode *inode, + struct qstr *qstr); +static int isofs_hash(const struct dentry *parent, const struct inode *inode, + struct qstr *qstr); +static int isofs_dentry_cmpi(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); +static int isofs_dentry_cmp(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); #ifdef CONFIG_JOLIET -static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr); -static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr); -static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b); -static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b); +static int isofs_hashi_ms(const struct dentry *parent, const struct inode *inode, + struct qstr *qstr); +static int isofs_hash_ms(const struct dentry *parent, const struct inode *inode, + struct qstr *qstr); +static int isofs_dentry_cmpi_ms(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); +static int isofs_dentry_cmp_ms(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name); #endif static void isofs_put_super(struct super_block *sb) @@ -65,11 +81,18 @@ static struct inode *isofs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void isofs_destroy_inode(struct inode *inode) +static void isofs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); } +static void isofs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, isofs_i_callback); +} + static void init_once(void *foo) { struct iso_inode_info *ei = foo; @@ -160,7 +183,7 @@ struct iso9660_options{ * Compute the hash for the isofs name corresponding to the dentry. */ static int -isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms) +isofs_hash_common(const struct dentry *dentry, struct qstr *qstr, int ms) { const char *name; int len; @@ -181,7 +204,7 @@ isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms) * Compute the hash for the isofs name corresponding to the dentry. */ static int -isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms) +isofs_hashi_common(const struct dentry *dentry, struct qstr *qstr, int ms) { const char *name; int len; @@ -206,100 +229,94 @@ isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms) } /* - * Case insensitive compare of two isofs names. - */ -static int isofs_dentry_cmpi_common(struct dentry *dentry, struct qstr *a, - struct qstr *b, int ms) -{ - int alen, blen; - - /* A filename cannot end in '.' or we treat it like it has none */ - alen = a->len; - blen = b->len; - if (ms) { - while (alen && a->name[alen-1] == '.') - alen--; - while (blen && b->name[blen-1] == '.') - blen--; - } - if (alen == blen) { - if (strnicmp(a->name, b->name, alen) == 0) - return 0; - } - return 1; -} - -/* - * Case sensitive compare of two isofs names. + * Compare of two isofs names. */ -static int isofs_dentry_cmp_common(struct dentry *dentry, struct qstr *a, - struct qstr *b, int ms) +static int isofs_dentry_cmp_common( + unsigned int len, const char *str, + const struct qstr *name, int ms, int ci) { int alen, blen; /* A filename cannot end in '.' or we treat it like it has none */ - alen = a->len; - blen = b->len; + alen = name->len; + blen = len; if (ms) { - while (alen && a->name[alen-1] == '.') + while (alen && name->name[alen-1] == '.') alen--; - while (blen && b->name[blen-1] == '.') + while (blen && str[blen-1] == '.') blen--; } if (alen == blen) { - if (strncmp(a->name, b->name, alen) == 0) - return 0; + if (ci) { + if (strnicmp(name->name, str, alen) == 0) + return 0; + } else { + if (strncmp(name->name, str, alen) == 0) + return 0; + } } return 1; } static int -isofs_hash(struct dentry *dentry, struct qstr *qstr) +isofs_hash(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { return isofs_hash_common(dentry, qstr, 0); } static int -isofs_hashi(struct dentry *dentry, struct qstr *qstr) +isofs_hashi(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { return isofs_hashi_common(dentry, qstr, 0); } static int -isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b) +isofs_dentry_cmp(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - return isofs_dentry_cmp_common(dentry, a, b, 0); + return isofs_dentry_cmp_common(len, str, name, 0, 0); } static int -isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b) +isofs_dentry_cmpi(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - return isofs_dentry_cmpi_common(dentry, a, b, 0); + return isofs_dentry_cmp_common(len, str, name, 0, 1); } #ifdef CONFIG_JOLIET static int -isofs_hash_ms(struct dentry *dentry, struct qstr *qstr) +isofs_hash_ms(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { return isofs_hash_common(dentry, qstr, 1); } static int -isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr) +isofs_hashi_ms(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { return isofs_hashi_common(dentry, qstr, 1); } static int -isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b) +isofs_dentry_cmp_ms(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - return isofs_dentry_cmp_common(dentry, a, b, 1); + return isofs_dentry_cmp_common(len, str, name, 1, 0); } static int -isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b) +isofs_dentry_cmpi_ms(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - return isofs_dentry_cmpi_common(dentry, a, b, 1); + return isofs_dentry_cmp_common(len, str, name, 1, 1); } #endif @@ -932,7 +949,7 @@ root_found: table += 2; if (opt.check == 'r') table++; - s->s_root->d_op = &isofs_dentry_ops[table]; + d_set_d_op(s->s_root, &isofs_dentry_ops[table]); kfree(opt.iocharset); @@ -1507,17 +1524,16 @@ struct inode *isofs_iget(struct super_block *sb, return inode; } -static int isofs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *isofs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); } static struct file_system_type iso9660_fs_type = { .owner = THIS_MODULE, .name = "iso9660", - .get_sb = isofs_get_sb, + .mount = isofs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c index 0d23abf..679a849 100644 --- a/fs/isofs/namei.c +++ b/fs/isofs/namei.c @@ -37,7 +37,8 @@ isofs_cmp(struct dentry *dentry, const char *compare, int dlen) qstr.name = compare; qstr.len = dlen; - return dentry->d_op->d_compare(dentry, &dentry->d_name, &qstr); + return dentry->d_op->d_compare(NULL, NULL, NULL, NULL, + dentry->d_name.len, dentry->d_name.name, &qstr); } /* @@ -171,7 +172,7 @@ struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, struct nam struct inode *inode; struct page *page; - dentry->d_op = dir->i_sb->s_root->d_op; + d_set_d_op(dentry, dir->i_sb->s_root->d_op); page = alloc_page(GFP_USER); if (!page) diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c index 846a3f3..5b2e4c3 100644 --- a/fs/jbd/transaction.c +++ b/fs/jbd/transaction.c @@ -207,7 +207,7 @@ repeat_locked: * the committing transaction. Really, we only need to give it * committing_transaction->t_outstanding_credits plus "enough" for * the log control blocks. - * Also, this test is inconsitent with the matching one in + * Also, this test is inconsistent with the matching one in * journal_extend(). */ if (__log_space_left(journal) < jbd_space_needed(journal)) { diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 538417c..9e46869 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -43,6 +43,7 @@ #include <linux/vmalloc.h> #include <linux/backing-dev.h> #include <linux/bitops.h> +#include <linux/ratelimit.h> #define CREATE_TRACE_POINTS #include <trace/events/jbd2.h> @@ -93,6 +94,7 @@ EXPORT_SYMBOL(jbd2_journal_file_inode); EXPORT_SYMBOL(jbd2_journal_init_jbd_inode); EXPORT_SYMBOL(jbd2_journal_release_jbd_inode); EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate); +EXPORT_SYMBOL(jbd2_inode_cache); static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *); static void __journal_abort_soft (journal_t *journal, int errno); @@ -827,7 +829,7 @@ static journal_t * journal_init_common (void) journal = kzalloc(sizeof(*journal), GFP_KERNEL); if (!journal) - goto fail; + return NULL; init_waitqueue_head(&journal->j_wait_transaction_locked); init_waitqueue_head(&journal->j_wait_logspace); @@ -852,14 +854,12 @@ static journal_t * journal_init_common (void) err = jbd2_journal_init_revoke(journal, JOURNAL_REVOKE_DEFAULT_HASH); if (err) { kfree(journal); - goto fail; + return NULL; } spin_lock_init(&journal->j_history_lock); return journal; -fail: - return NULL; } /* jbd2_journal_init_dev and jbd2_journal_init_inode: @@ -899,6 +899,14 @@ journal_t * jbd2_journal_init_dev(struct block_device *bdev, /* journal descriptor can store up to n blocks -bzzz */ journal->j_blocksize = blocksize; + journal->j_dev = bdev; + journal->j_fs_dev = fs_dev; + journal->j_blk_offset = start; + journal->j_maxlen = len; + bdevname(journal->j_dev, journal->j_devname); + p = journal->j_devname; + while ((p = strchr(p, '/'))) + *p = '!'; jbd2_stats_proc_init(journal); n = journal->j_blocksize / sizeof(journal_block_tag_t); journal->j_wbufsize = n; @@ -908,14 +916,6 @@ journal_t * jbd2_journal_init_dev(struct block_device *bdev, __func__); goto out_err; } - journal->j_dev = bdev; - journal->j_fs_dev = fs_dev; - journal->j_blk_offset = start; - journal->j_maxlen = len; - bdevname(journal->j_dev, journal->j_devname); - p = journal->j_devname; - while ((p = strchr(p, '/'))) - *p = '!'; bh = __getblk(journal->j_dev, start, journal->j_blocksize); if (!bh) { @@ -1838,7 +1838,6 @@ size_t journal_tag_bytes(journal_t *journal) */ #define JBD2_MAX_SLABS 8 static struct kmem_cache *jbd2_slab[JBD2_MAX_SLABS]; -static DECLARE_MUTEX(jbd2_slab_create_sem); static const char *jbd2_slab_names[JBD2_MAX_SLABS] = { "jbd2_1k", "jbd2_2k", "jbd2_4k", "jbd2_8k", @@ -1859,6 +1858,7 @@ static void jbd2_journal_destroy_slabs(void) static int jbd2_journal_create_slab(size_t size) { + static DEFINE_MUTEX(jbd2_slab_create_mutex); int i = order_base_2(size) - 10; size_t slab_size; @@ -1870,16 +1870,16 @@ static int jbd2_journal_create_slab(size_t size) if (unlikely(i < 0)) i = 0; - down(&jbd2_slab_create_sem); + mutex_lock(&jbd2_slab_create_mutex); if (jbd2_slab[i]) { - up(&jbd2_slab_create_sem); + mutex_unlock(&jbd2_slab_create_mutex); return 0; /* Already created */ } slab_size = 1 << (i+10); jbd2_slab[i] = kmem_cache_create(jbd2_slab_names[i], slab_size, slab_size, 0, NULL); - up(&jbd2_slab_create_sem); + mutex_unlock(&jbd2_slab_create_mutex); if (!jbd2_slab[i]) { printk(KERN_EMERG "JBD2: no memory for jbd2_slab cache\n"); return -ENOMEM; @@ -1982,7 +1982,6 @@ static void jbd2_journal_destroy_jbd2_journal_head_cache(void) static struct journal_head *journal_alloc_journal_head(void) { struct journal_head *ret; - static unsigned long last_warning; #ifdef CONFIG_JBD2_DEBUG atomic_inc(&nr_journal_heads); @@ -1990,11 +1989,7 @@ static struct journal_head *journal_alloc_journal_head(void) ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS); if (!ret) { jbd_debug(1, "out of memory for journal_head\n"); - if (time_after(jiffies, last_warning + 5*HZ)) { - printk(KERN_NOTICE "ENOMEM in %s, retrying.\n", - __func__); - last_warning = jiffies; - } + pr_notice_ratelimited("ENOMEM in %s, retrying.\n", __func__); while (!ret) { yield(); ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS); @@ -2292,17 +2287,19 @@ static void __exit jbd2_remove_jbd_stats_proc_entry(void) #endif -struct kmem_cache *jbd2_handle_cache; +struct kmem_cache *jbd2_handle_cache, *jbd2_inode_cache; static int __init journal_init_handle_cache(void) { - jbd2_handle_cache = kmem_cache_create("jbd2_journal_handle", - sizeof(handle_t), - 0, /* offset */ - SLAB_TEMPORARY, /* flags */ - NULL); /* ctor */ + jbd2_handle_cache = KMEM_CACHE(jbd2_journal_handle, SLAB_TEMPORARY); if (jbd2_handle_cache == NULL) { - printk(KERN_EMERG "JBD: failed to create handle cache\n"); + printk(KERN_EMERG "JBD2: failed to create handle cache\n"); + return -ENOMEM; + } + jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0); + if (jbd2_inode_cache == NULL) { + printk(KERN_EMERG "JBD2: failed to create inode cache\n"); + kmem_cache_destroy(jbd2_handle_cache); return -ENOMEM; } return 0; @@ -2312,6 +2309,9 @@ static void jbd2_journal_destroy_handle_cache(void) { if (jbd2_handle_cache) kmem_cache_destroy(jbd2_handle_cache); + if (jbd2_inode_cache) + kmem_cache_destroy(jbd2_inode_cache); + } /* diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c index 2bc4d5f..1cad869 100644 --- a/fs/jbd2/recovery.c +++ b/fs/jbd2/recovery.c @@ -299,10 +299,10 @@ int jbd2_journal_skip_recovery(journal_t *journal) #ifdef CONFIG_JBD2_DEBUG int dropped = info.end_transaction - be32_to_cpu(journal->j_superblock->s_sequence); -#endif jbd_debug(1, "JBD: ignoring %d transaction%s from the journal.\n", dropped, (dropped == 1) ? "" : "s"); +#endif journal->j_transaction_sequence = ++info.end_transaction; } diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 6bf0a24..faad2bd 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -251,7 +251,7 @@ repeat: * the committing transaction. Really, we only need to give it * committing_transaction->t_outstanding_credits plus "enough" for * the log control blocks. - * Also, this test is inconsitent with the matching one in + * Also, this test is inconsistent with the matching one in * jbd2_journal_extend(). */ if (__jbd2_log_space_left(journal) < jbd_space_needed(journal)) { @@ -340,9 +340,7 @@ handle_t *jbd2__journal_start(journal_t *journal, int nblocks, int gfp_mask) jbd2_free_handle(handle); current->journal_info = NULL; handle = ERR_PTR(err); - goto out; } -out: return handle; } EXPORT_SYMBOL(jbd2__journal_start); @@ -589,7 +587,7 @@ do_get_write_access(handle_t *handle, struct journal_head *jh, transaction = handle->h_transaction; journal = transaction->t_journal; - jbd_debug(5, "buffer_head %p, force_copy %d\n", jh, force_copy); + jbd_debug(5, "journal_head %p, force_copy %d\n", jh, force_copy); JBUFFER_TRACE(jh, "entry"); repeat: @@ -774,7 +772,7 @@ done: J_EXPECT_JH(jh, buffer_uptodate(jh2bh(jh)), "Possible IO failure.\n"); page = jh2bh(jh)->b_page; - offset = ((unsigned long) jh2bh(jh)->b_data) & ~PAGE_MASK; + offset = offset_in_page(jh2bh(jh)->b_data); source = kmap_atomic(page, KM_USER0); /* Fire data frozen trigger just before we copy the data */ jbd2_buffer_frozen_trigger(jh, source + offset, diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c index 54a92fd..95b7967 100644 --- a/fs/jffs2/acl.c +++ b/fs/jffs2/acl.c @@ -259,11 +259,14 @@ static int jffs2_set_acl(struct inode *inode, int type, struct posix_acl *acl) return rc; } -int jffs2_check_acl(struct inode *inode, int mask) +int jffs2_check_acl(struct inode *inode, int mask, unsigned int flags) { struct posix_acl *acl; int rc; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + acl = jffs2_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h index 5e42de8..3119f59 100644 --- a/fs/jffs2/acl.h +++ b/fs/jffs2/acl.h @@ -26,7 +26,7 @@ struct jffs2_acl_header { #ifdef CONFIG_JFFS2_FS_POSIX_ACL -extern int jffs2_check_acl(struct inode *, int); +extern int jffs2_check_acl(struct inode *, int, unsigned int); extern int jffs2_acl_chmod(struct inode *); extern int jffs2_init_acl_pre(struct inode *, struct inode *, int *); extern int jffs2_init_acl_post(struct inode *); diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c index a906f53..85c6be2 100644 --- a/fs/jffs2/build.c +++ b/fs/jffs2/build.c @@ -23,7 +23,7 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *, static inline struct jffs2_inode_cache * first_inode_chain(int *i, struct jffs2_sb_info *c) { - for (; *i < INOCACHE_HASHSIZE; (*i)++) { + for (; *i < c->inocache_hashsize; (*i)++) { if (c->inocache_list[*i]) return c->inocache_list[*i]; } diff --git a/fs/jffs2/compr.c b/fs/jffs2/compr.c index 617a1e5..de42470 100644 --- a/fs/jffs2/compr.c +++ b/fs/jffs2/compr.c @@ -103,7 +103,7 @@ uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f, spin_unlock(&jffs2_compressor_list_lock); *datalen = orig_slen; *cdatalen = orig_dlen; - compr_ret = this->compress(data_in, output_buf, datalen, cdatalen, NULL); + compr_ret = this->compress(data_in, output_buf, datalen, cdatalen); spin_lock(&jffs2_compressor_list_lock); this->usecount--; if (!compr_ret) { @@ -152,7 +152,7 @@ uint16_t jffs2_compress(struct jffs2_sb_info *c, struct jffs2_inode_info *f, spin_unlock(&jffs2_compressor_list_lock); *datalen = orig_slen; *cdatalen = orig_dlen; - compr_ret = this->compress(data_in, this->compr_buf, datalen, cdatalen, NULL); + compr_ret = this->compress(data_in, this->compr_buf, datalen, cdatalen); spin_lock(&jffs2_compressor_list_lock); this->usecount--; if (!compr_ret) { @@ -220,7 +220,7 @@ int jffs2_decompress(struct jffs2_sb_info *c, struct jffs2_inode_info *f, if (comprtype == this->compr) { this->usecount++; spin_unlock(&jffs2_compressor_list_lock); - ret = this->decompress(cdata_in, data_out, cdatalen, datalen, NULL); + ret = this->decompress(cdata_in, data_out, cdatalen, datalen); spin_lock(&jffs2_compressor_list_lock); if (ret) { printk(KERN_WARNING "Decompressor \"%s\" returned %d\n", this->name, ret); diff --git a/fs/jffs2/compr.h b/fs/jffs2/compr.h index e471a91..13bb759 100644 --- a/fs/jffs2/compr.h +++ b/fs/jffs2/compr.h @@ -49,9 +49,9 @@ struct jffs2_compressor { char *name; char compr; /* JFFS2_COMPR_XXX */ int (*compress)(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *srclen, uint32_t *destlen, void *model); + uint32_t *srclen, uint32_t *destlen); int (*decompress)(unsigned char *cdata_in, unsigned char *data_out, - uint32_t cdatalen, uint32_t datalen, void *model); + uint32_t cdatalen, uint32_t datalen); int usecount; int disabled; /* if set the compressor won't compress */ unsigned char *compr_buf; /* used by size compr. mode */ diff --git a/fs/jffs2/compr_lzo.c b/fs/jffs2/compr_lzo.c index ed25ae7c..af186ee 100644 --- a/fs/jffs2/compr_lzo.c +++ b/fs/jffs2/compr_lzo.c @@ -42,7 +42,7 @@ static int __init alloc_workspace(void) } static int jffs2_lzo_compress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *sourcelen, uint32_t *dstlen, void *model) + uint32_t *sourcelen, uint32_t *dstlen) { size_t compress_size; int ret; @@ -67,7 +67,7 @@ static int jffs2_lzo_compress(unsigned char *data_in, unsigned char *cpage_out, } static int jffs2_lzo_decompress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t srclen, uint32_t destlen, void *model) + uint32_t srclen, uint32_t destlen) { size_t dl = destlen; int ret; diff --git a/fs/jffs2/compr_rtime.c b/fs/jffs2/compr_rtime.c index 9696ad9..16a5047 100644 --- a/fs/jffs2/compr_rtime.c +++ b/fs/jffs2/compr_rtime.c @@ -31,8 +31,7 @@ /* _compress returns the compressed size, -1 if bigger */ static int jffs2_rtime_compress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *sourcelen, uint32_t *dstlen, - void *model) + uint32_t *sourcelen, uint32_t *dstlen) { short positions[256]; int outpos = 0; @@ -73,8 +72,7 @@ static int jffs2_rtime_compress(unsigned char *data_in, static int jffs2_rtime_decompress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t srclen, uint32_t destlen, - void *model) + uint32_t srclen, uint32_t destlen) { short positions[256]; int outpos = 0; diff --git a/fs/jffs2/compr_rubin.c b/fs/jffs2/compr_rubin.c index a12b4f7..9e7cec8 100644 --- a/fs/jffs2/compr_rubin.c +++ b/fs/jffs2/compr_rubin.c @@ -298,7 +298,7 @@ static int rubin_do_compress(int bit_divider, int *bits, unsigned char *data_in, #if 0 /* _compress returns the compressed size, -1 if bigger */ int jffs2_rubinmips_compress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *sourcelen, uint32_t *dstlen, void *model) + uint32_t *sourcelen, uint32_t *dstlen) { return rubin_do_compress(BIT_DIVIDER_MIPS, bits_mips, data_in, cpage_out, sourcelen, dstlen); @@ -306,8 +306,7 @@ int jffs2_rubinmips_compress(unsigned char *data_in, unsigned char *cpage_out, #endif static int jffs2_dynrubin_compress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *sourcelen, uint32_t *dstlen, - void *model) + uint32_t *sourcelen, uint32_t *dstlen) { int bits[8]; unsigned char histo[256]; @@ -387,8 +386,7 @@ static void rubin_do_decompress(int bit_divider, int *bits, static int jffs2_rubinmips_decompress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t sourcelen, uint32_t dstlen, - void *model) + uint32_t sourcelen, uint32_t dstlen) { rubin_do_decompress(BIT_DIVIDER_MIPS, bits_mips, data_in, cpage_out, sourcelen, dstlen); @@ -397,8 +395,7 @@ static int jffs2_rubinmips_decompress(unsigned char *data_in, static int jffs2_dynrubin_decompress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t sourcelen, uint32_t dstlen, - void *model) + uint32_t sourcelen, uint32_t dstlen) { int bits[8]; int c; diff --git a/fs/jffs2/compr_zlib.c b/fs/jffs2/compr_zlib.c index 97fc45d..fd05a0b 100644 --- a/fs/jffs2/compr_zlib.c +++ b/fs/jffs2/compr_zlib.c @@ -68,8 +68,7 @@ static void free_workspaces(void) static int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *sourcelen, uint32_t *dstlen, - void *model) + uint32_t *sourcelen, uint32_t *dstlen) { int ret; @@ -136,8 +135,7 @@ static int jffs2_zlib_compress(unsigned char *data_in, static int jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t srclen, uint32_t destlen, - void *model) + uint32_t srclen, uint32_t destlen) { int ret; int wbits = MAX_WBITS; diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index 79121aa..9297865 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -367,7 +367,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char } /* We use f->target field to store the target path. */ - f->target = kmalloc(targetlen + 1, GFP_KERNEL); + f->target = kmemdup(target, targetlen + 1, GFP_KERNEL); if (!f->target) { printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1); mutex_unlock(&f->sem); @@ -376,7 +376,6 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char goto fail; } - memcpy(f->target, target, targetlen + 1); D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target)); /* No data here. Only a metadata node, which will be diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c index abac961..e513f19 100644 --- a/fs/jffs2/erase.c +++ b/fs/jffs2/erase.c @@ -151,7 +151,7 @@ int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count) } /* Be nice */ - yield(); + cond_resched(); mutex_lock(&c->erase_free_sem); spin_lock(&c->erase_completion_lock); } diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index d9beb06..e896e67 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -474,6 +474,25 @@ struct inode *jffs2_new_inode (struct inode *dir_i, int mode, struct jffs2_raw_i return inode; } +static int calculate_inocache_hashsize(uint32_t flash_size) +{ + /* + * Pick a inocache hash size based on the size of the medium. + * Count how many megabytes we're dealing with, apply a hashsize twice + * that size, but rounding down to the usual big powers of 2. And keep + * to sensible bounds. + */ + + int size_mb = flash_size / 1024 / 1024; + int hashsize = (size_mb * 2) & ~0x3f; + + if (hashsize < INOCACHE_HASHSIZE_MIN) + return INOCACHE_HASHSIZE_MIN; + if (hashsize > INOCACHE_HASHSIZE_MAX) + return INOCACHE_HASHSIZE_MAX; + + return hashsize; +} int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) { @@ -520,7 +539,8 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) if (ret) return ret; - c->inocache_list = kcalloc(INOCACHE_HASHSIZE, sizeof(struct jffs2_inode_cache *), GFP_KERNEL); + c->inocache_hashsize = calculate_inocache_hashsize(c->flash_size); + c->inocache_list = kcalloc(c->inocache_hashsize, sizeof(struct jffs2_inode_cache *), GFP_KERNEL); if (!c->inocache_list) { ret = -ENOMEM; goto out_wbuf; diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index 846a794..31dce61133 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -219,13 +219,14 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c) if (!list_empty(&c->erase_complete_list) || !list_empty(&c->erase_pending_list)) { spin_unlock(&c->erase_completion_lock); + mutex_unlock(&c->alloc_sem); D1(printk(KERN_DEBUG "jffs2_garbage_collect_pass() erasing pending blocks\n")); - if (jffs2_erase_pending_blocks(c, 1)) { - mutex_unlock(&c->alloc_sem); + if (jffs2_erase_pending_blocks(c, 1)) return 0; - } + D1(printk(KERN_DEBUG "No progress from erasing blocks; doing GC anyway\n")); spin_lock(&c->erase_completion_lock); + mutex_lock(&c->alloc_sem); } /* First, work out which block we're garbage-collecting */ diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h index 6784bc8..f864005 100644 --- a/fs/jffs2/jffs2_fs_sb.h +++ b/fs/jffs2/jffs2_fs_sb.h @@ -100,6 +100,7 @@ struct jffs2_sb_info { wait_queue_head_t erase_wait; /* For waiting for erases to complete */ wait_queue_head_t inocache_wq; + int inocache_hashsize; struct jffs2_inode_cache **inocache_list; spinlock_t inocache_lock; diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c index af02bd1..5e03233 100644 --- a/fs/jffs2/nodelist.c +++ b/fs/jffs2/nodelist.c @@ -420,7 +420,7 @@ struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t { struct jffs2_inode_cache *ret; - ret = c->inocache_list[ino % INOCACHE_HASHSIZE]; + ret = c->inocache_list[ino % c->inocache_hashsize]; while (ret && ret->ino < ino) { ret = ret->next; } @@ -441,7 +441,7 @@ void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new dbg_inocache("add %p (ino #%u)\n", new, new->ino); - prev = &c->inocache_list[new->ino % INOCACHE_HASHSIZE]; + prev = &c->inocache_list[new->ino % c->inocache_hashsize]; while ((*prev) && (*prev)->ino < new->ino) { prev = &(*prev)->next; @@ -462,7 +462,7 @@ void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old) dbg_inocache("del %p (ino #%u)\n", old, old->ino); spin_lock(&c->inocache_lock); - prev = &c->inocache_list[old->ino % INOCACHE_HASHSIZE]; + prev = &c->inocache_list[old->ino % c->inocache_hashsize]; while ((*prev) && (*prev)->ino < old->ino) { prev = &(*prev)->next; @@ -487,7 +487,7 @@ void jffs2_free_ino_caches(struct jffs2_sb_info *c) int i; struct jffs2_inode_cache *this, *next; - for (i=0; i<INOCACHE_HASHSIZE; i++) { + for (i=0; i < c->inocache_hashsize; i++) { this = c->inocache_list[i]; while (this) { next = this->next; diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h index 523a916..5a53d9b 100644 --- a/fs/jffs2/nodelist.h +++ b/fs/jffs2/nodelist.h @@ -199,7 +199,8 @@ struct jffs2_inode_cache { #define RAWNODE_CLASS_XATTR_DATUM 1 #define RAWNODE_CLASS_XATTR_REF 2 -#define INOCACHE_HASHSIZE 128 +#define INOCACHE_HASHSIZE_MIN 128 +#define INOCACHE_HASHSIZE_MAX 1024 #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size) diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c index 46f870d..b632ddd 100644 --- a/fs/jffs2/scan.c +++ b/fs/jffs2/scan.c @@ -20,7 +20,7 @@ #include "summary.h" #include "debug.h" -#define DEFAULT_EMPTY_SCAN_SIZE 1024 +#define DEFAULT_EMPTY_SCAN_SIZE 256 #define noisy_printk(noise, args...) do { \ if (*(noise)) { \ @@ -435,7 +435,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo unsigned char *buf, uint32_t buf_size, struct jffs2_summary *s) { struct jffs2_unknown_node *node; struct jffs2_unknown_node crcnode; - uint32_t ofs, prevofs; + uint32_t ofs, prevofs, max_ofs; uint32_t hdr_crc, buf_ofs, buf_len; int err; int noise = 0; @@ -550,12 +550,12 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo /* We temporarily use 'ofs' as a pointer into the buffer/jeb */ ofs = 0; - - /* Scan only 4KiB of 0xFF before declaring it's empty */ - while(ofs < EMPTY_SCAN_SIZE(c->sector_size) && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF) + max_ofs = EMPTY_SCAN_SIZE(c->sector_size); + /* Scan only EMPTY_SCAN_SIZE of 0xFF before declaring it's empty */ + while(ofs < max_ofs && *(uint32_t *)(&buf[ofs]) == 0xFFFFFFFF) ofs += 4; - if (ofs == EMPTY_SCAN_SIZE(c->sector_size)) { + if (ofs == max_ofs) { #ifdef CONFIG_JFFS2_FS_WRITEBUFFER if (jffs2_cleanmarker_oob(c)) { /* scan oob, take care of cleanmarker */ diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index d1ae5df..853b8e3 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -40,11 +40,18 @@ static struct inode *jffs2_alloc_inode(struct super_block *sb) return &f->vfs_inode; } -static void jffs2_destroy_inode(struct inode *inode) +static void jffs2_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode)); } +static void jffs2_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, jffs2_i_callback); +} + static void jffs2_i_init_once(void *foo) { struct jffs2_inode_info *f = foo; @@ -179,12 +186,11 @@ static int jffs2_fill_super(struct super_block *sb, void *data, int silent) return ret; } -static int jffs2_get_sb(struct file_system_type *fs_type, +static struct dentry *jffs2_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_mtd(fs_type, flags, dev_name, data, jffs2_fill_super, - mnt); + return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super); } static void jffs2_put_super (struct super_block *sb) @@ -229,7 +235,7 @@ static void jffs2_kill_sb(struct super_block *sb) static struct file_system_type jffs2_fs_type = { .owner = THIS_MODULE, .name = "jffs2", - .get_sb = jffs2_get_sb, + .mount = jffs2_mount, .kill_sb = jffs2_kill_sb, }; diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c index 1057a49..e5de942 100644 --- a/fs/jfs/acl.c +++ b/fs/jfs/acl.c @@ -114,10 +114,14 @@ out: return rc; } -int jfs_check_acl(struct inode *inode, int mask) +int jfs_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct posix_acl *acl = jfs_get_acl(inode, ACL_TYPE_ACCESS); + struct posix_acl *acl; + + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + acl = jfs_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); if (acl) { diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h index 54e0755..f9285c4 100644 --- a/fs/jfs/jfs_acl.h +++ b/fs/jfs/jfs_acl.h @@ -20,7 +20,7 @@ #ifdef CONFIG_JFS_POSIX_ACL -int jfs_check_acl(struct inode *, int); +int jfs_check_acl(struct inode *, int, unsigned int flags); int jfs_init_acl(tid_t, struct inode *, struct inode *); int jfs_acl_chmod(struct inode *inode); diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index 231ca4a..4414e3a 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -18,6 +18,7 @@ */ #include <linux/fs.h> +#include <linux/namei.h> #include <linux/ctype.h> #include <linux/quotaops.h> #include <linux/exportfs.h> @@ -1465,7 +1466,7 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc jfs_info("jfs_lookup: name = %s", name); if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2) - dentry->d_op = &jfs_ci_dentry_operations; + d_set_d_op(dentry, &jfs_ci_dentry_operations); if ((name[0] == '.') && (len == 1)) inum = dip->i_ino; @@ -1494,7 +1495,7 @@ static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struc dentry = d_splice_alias(ip, dentry); if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)) - dentry->d_op = &jfs_ci_dentry_operations; + d_set_d_op(dentry, &jfs_ci_dentry_operations); return dentry; } @@ -1573,7 +1574,8 @@ const struct file_operations jfs_dir_operations = { .llseek = generic_file_llseek, }; -static int jfs_ci_hash(struct dentry *dir, struct qstr *this) +static int jfs_ci_hash(const struct dentry *dir, const struct inode *inode, + struct qstr *this) { unsigned long hash; int i; @@ -1586,32 +1588,63 @@ static int jfs_ci_hash(struct dentry *dir, struct qstr *this) return 0; } -static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b) +static int jfs_ci_compare(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { int i, result = 1; - if (a->len != b->len) + if (len != name->len) goto out; - for (i=0; i < a->len; i++) { - if (tolower(a->name[i]) != tolower(b->name[i])) + for (i=0; i < len; i++) { + if (tolower(str[i]) != tolower(name->name[i])) goto out; } result = 0; +out: + return result; +} +static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd) +{ + if (nd->flags & LOOKUP_RCU) + return -ECHILD; /* - * We want creates to preserve case. A negative dentry, a, that - * has a different case than b may cause a new entry to be created - * with the wrong case. Since we can't tell if a comes from a negative - * dentry, we blindly replace it with b. This should be harmless if - * a is not a negative dentry. + * This is not negative dentry. Always valid. + * + * Note, rename() to existing directory entry will have ->d_inode, + * and will use existing name which isn't specified name by user. + * + * We may be able to drop this positive dentry here. But dropping + * positive dentry isn't good idea. So it's unsupported like + * rename("filename", "FILENAME") for now. */ - memcpy((unsigned char *)a->name, b->name, a->len); -out: - return result; + if (dentry->d_inode) + return 1; + + /* + * This may be nfsd (or something), anyway, we can't see the + * intent of this. So, since this can be for creation, drop it. + */ + if (!nd) + return 0; + + /* + * Drop the negative dentry, in order to make sure to use the + * case sensitive name which is specified by user if this is + * for creation. + */ + if (!(nd->flags & (LOOKUP_CONTINUE | LOOKUP_PARENT))) { + if (nd->flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) + return 0; + } + return 1; } const struct dentry_operations jfs_ci_dentry_operations = { .d_hash = jfs_ci_hash, .d_compare = jfs_ci_compare, + .d_revalidate = jfs_ci_revalidate, }; diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 68eee2b..3150d76 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -115,6 +115,14 @@ static struct inode *jfs_alloc_inode(struct super_block *sb) return &jfs_inode->vfs_inode; } +static void jfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct jfs_inode_info *ji = JFS_IP(inode); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(jfs_inode_cachep, ji); +} + static void jfs_destroy_inode(struct inode *inode) { struct jfs_inode_info *ji = JFS_IP(inode); @@ -128,7 +136,7 @@ static void jfs_destroy_inode(struct inode *inode) ji->active_ag = -1; } spin_unlock_irq(&ji->ag_lock); - kmem_cache_free(jfs_inode_cachep, ji); + call_rcu(&inode->i_rcu, jfs_i_callback); } static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) @@ -517,7 +525,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent) goto out_no_root; if (sbi->mntflag & JFS_OS2) - sb->s_root->d_op = &jfs_ci_dentry_operations; + d_set_d_op(sb->s_root, &jfs_ci_dentry_operations); /* logical blocks are represented by 40 bits in pxd_t, etc. */ sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; @@ -583,11 +591,10 @@ static int jfs_unfreeze(struct super_block *sb) return 0; } -static int jfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *jfs_do_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super); } static int jfs_sync_fs(struct super_block *sb, int wait) @@ -770,7 +777,7 @@ static const struct export_operations jfs_export_operations = { static struct file_system_type jfs_fs_type = { .owner = THIS_MODULE, .name = "jfs", - .get_sb = jfs_get_sb, + .mount = jfs_do_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -16,6 +16,11 @@ #include <asm/uaccess.h> +static inline int simple_positive(struct dentry *dentry) +{ + return dentry->d_inode && !d_unhashed(dentry); +} + int simple_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { @@ -37,7 +42,7 @@ int simple_statfs(struct dentry *dentry, struct kstatfs *buf) * Retaining negative dentries for an in-memory filesystem just wastes * memory and lookup time: arrange for them to be deleted immediately. */ -static int simple_delete_dentry(struct dentry *dentry) +static int simple_delete_dentry(const struct dentry *dentry) { return 1; } @@ -54,7 +59,7 @@ struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, struct na if (dentry->d_name.len > NAME_MAX) return ERR_PTR(-ENAMETOOLONG); - dentry->d_op = &simple_dentry_operations; + d_set_d_op(dentry, &simple_dentry_operations); d_add(dentry, NULL); return NULL; } @@ -76,7 +81,8 @@ int dcache_dir_close(struct inode *inode, struct file *file) loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin) { - mutex_lock(&file->f_path.dentry->d_inode->i_mutex); + struct dentry *dentry = file->f_path.dentry; + mutex_lock(&dentry->d_inode->i_mutex); switch (origin) { case 1: offset += file->f_pos; @@ -84,7 +90,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin) if (offset >= 0) break; default: - mutex_unlock(&file->f_path.dentry->d_inode->i_mutex); + mutex_unlock(&dentry->d_inode->i_mutex); return -EINVAL; } if (offset != file->f_pos) { @@ -94,21 +100,24 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin) struct dentry *cursor = file->private_data; loff_t n = file->f_pos - 2; - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); + /* d_lock not required for cursor */ list_del(&cursor->d_u.d_child); - p = file->f_path.dentry->d_subdirs.next; - while (n && p != &file->f_path.dentry->d_subdirs) { + p = dentry->d_subdirs.next; + while (n && p != &dentry->d_subdirs) { struct dentry *next; next = list_entry(p, struct dentry, d_u.d_child); - if (!d_unhashed(next) && next->d_inode) + spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED); + if (simple_positive(next)) n--; + spin_unlock(&next->d_lock); p = p->next; } list_add_tail(&cursor->d_u.d_child, p); - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); } } - mutex_unlock(&file->f_path.dentry->d_inode->i_mutex); + mutex_unlock(&dentry->d_inode->i_mutex); return offset; } @@ -148,29 +157,35 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir) i++; /* fallthrough */ default: - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); if (filp->f_pos == 2) list_move(q, &dentry->d_subdirs); for (p=q->next; p != &dentry->d_subdirs; p=p->next) { struct dentry *next; next = list_entry(p, struct dentry, d_u.d_child); - if (d_unhashed(next) || !next->d_inode) + spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED); + if (!simple_positive(next)) { + spin_unlock(&next->d_lock); continue; + } - spin_unlock(&dcache_lock); + spin_unlock(&next->d_lock); + spin_unlock(&dentry->d_lock); if (filldir(dirent, next->d_name.name, next->d_name.len, filp->f_pos, next->d_inode->i_ino, dt_type(next->d_inode)) < 0) return 0; - spin_lock(&dcache_lock); + spin_lock(&dentry->d_lock); + spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED); /* next is still alive */ list_move(q, p); + spin_unlock(&next->d_lock); p = q; filp->f_pos++; } - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); } return 0; } @@ -201,9 +216,8 @@ static const struct super_operations simple_super_operations = { * Common helper for pseudo-filesystems (sockfs, pipefs, bdev - stuff that * will never be mountable) */ -int get_sb_pseudo(struct file_system_type *fs_type, char *name, - const struct super_operations *ops, unsigned long magic, - struct vfsmount *mnt) +struct dentry *mount_pseudo(struct file_system_type *fs_type, char *name, + const struct super_operations *ops, unsigned long magic) { struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL); struct dentry *dentry; @@ -211,7 +225,7 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name, struct qstr d_name = {.name = name, .len = strlen(name)}; if (IS_ERR(s)) - return PTR_ERR(s); + return ERR_CAST(s); s->s_flags = MS_NOUSER; s->s_maxbytes = MAX_LFS_FILESIZE; @@ -241,12 +255,11 @@ int get_sb_pseudo(struct file_system_type *fs_type, char *name, d_instantiate(dentry, root); s->s_root = dentry; s->s_flags |= MS_ACTIVE; - simple_set_mnt(mnt, s); - return 0; + return dget(s->s_root); Enomem: deactivate_locked_super(s); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) @@ -261,23 +274,23 @@ int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *den return 0; } -static inline int simple_positive(struct dentry *dentry) -{ - return dentry->d_inode && !d_unhashed(dentry); -} - int simple_empty(struct dentry *dentry) { struct dentry *child; int ret = 0; - spin_lock(&dcache_lock); - list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) - if (simple_positive(child)) + spin_lock(&dentry->d_lock); + list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) { + spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED); + if (simple_positive(child)) { + spin_unlock(&child->d_lock); goto out; + } + spin_unlock(&child->d_lock); + } ret = 1; out: - spin_unlock(&dcache_lock); + spin_unlock(&dentry->d_lock); return ret; } @@ -951,7 +964,7 @@ EXPORT_SYMBOL(dcache_dir_lseek); EXPORT_SYMBOL(dcache_dir_open); EXPORT_SYMBOL(dcache_readdir); EXPORT_SYMBOL(generic_read_dir); -EXPORT_SYMBOL(get_sb_pseudo); +EXPORT_SYMBOL(mount_pseudo); EXPORT_SYMBOL(simple_write_begin); EXPORT_SYMBOL(simple_write_end); EXPORT_SYMBOL(simple_dir_inode_operations); diff --git a/fs/lockd/Makefile b/fs/lockd/Makefile index 97f6073..ca58d64 100644 --- a/fs/lockd/Makefile +++ b/fs/lockd/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_LOCKD) += lockd.o -lockd-objs-y := clntlock.o clntproc.o host.o svc.o svclock.o svcshare.o \ - svcproc.o svcsubs.o mon.o xdr.o grace.o -lockd-objs-$(CONFIG_LOCKD_V4) += xdr4.o svc4proc.o +lockd-objs-y := clntlock.o clntproc.o clntxdr.o host.o svc.o svclock.o \ + svcshare.o svcproc.o svcsubs.o mon.o xdr.o grace.o +lockd-objs-$(CONFIG_LOCKD_V4) += clnt4xdr.o xdr4.o svc4proc.o lockd-objs := $(lockd-objs-y) diff --git a/fs/lockd/clnt4xdr.c b/fs/lockd/clnt4xdr.c new file mode 100644 index 0000000..f848b52 --- /dev/null +++ b/fs/lockd/clnt4xdr.c @@ -0,0 +1,605 @@ +/* + * linux/fs/lockd/clnt4xdr.c + * + * XDR functions to encode/decode NLM version 4 RPC arguments and results. + * + * NLM client-side only. + * + * Copyright (C) 2010, Oracle. All rights reserved. + */ + +#include <linux/types.h> +#include <linux/sunrpc/xdr.h> +#include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/stats.h> +#include <linux/lockd/lockd.h> + +#define NLMDBG_FACILITY NLMDBG_XDR + +#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) +# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" +#endif + +#if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN) +# error "NLM host name cannot be larger than NLM's maximum string length!" +#endif + +/* + * Declare the space requirements for NLM arguments and replies as + * number of 32bit-words + */ +#define NLM4_void_sz (0) +#define NLM4_cookie_sz (1+(NLM_MAXCOOKIELEN>>2)) +#define NLM4_caller_sz (1+(NLMCLNT_OHSIZE>>2)) +#define NLM4_owner_sz (1+(NLMCLNT_OHSIZE>>2)) +#define NLM4_fhandle_sz (1+(NFS3_FHSIZE>>2)) +#define NLM4_lock_sz (5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz) +#define NLM4_holder_sz (6+NLM4_owner_sz) + +#define NLM4_testargs_sz (NLM4_cookie_sz+1+NLM4_lock_sz) +#define NLM4_lockargs_sz (NLM4_cookie_sz+4+NLM4_lock_sz) +#define NLM4_cancargs_sz (NLM4_cookie_sz+2+NLM4_lock_sz) +#define NLM4_unlockargs_sz (NLM4_cookie_sz+NLM4_lock_sz) + +#define NLM4_testres_sz (NLM4_cookie_sz+1+NLM4_holder_sz) +#define NLM4_res_sz (NLM4_cookie_sz+1) +#define NLM4_norep_sz (0) + + +static s64 loff_t_to_s64(loff_t offset) +{ + s64 res; + + if (offset >= NLM4_OFFSET_MAX) + res = NLM4_OFFSET_MAX; + else if (offset <= -NLM4_OFFSET_MAX) + res = -NLM4_OFFSET_MAX; + else + res = offset; + return res; +} + +static void nlm4_compute_offsets(const struct nlm_lock *lock, + u64 *l_offset, u64 *l_len) +{ + const struct file_lock *fl = &lock->fl; + + BUG_ON(fl->fl_start > NLM4_OFFSET_MAX); + BUG_ON(fl->fl_end > NLM4_OFFSET_MAX && + fl->fl_end != OFFSET_MAX); + + *l_offset = loff_t_to_s64(fl->fl_start); + if (fl->fl_end == OFFSET_MAX) + *l_len = 0; + else + *l_len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1); +} + +/* + * Handle decode buffer overflows out-of-line. + */ +static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) +{ + dprintk("lockd: %s prematurely hit the end of our receive buffer. " + "Remaining buffer length is %tu words.\n", + func, xdr->end - xdr->p); +} + + +/* + * Encode/decode NLMv4 basic data types + * + * Basic NLMv4 data types are defined in Appendix II, section 6.1.4 + * of RFC 1813: "NFS Version 3 Protocol Specification" and in Chapter + * 10 of X/Open's "Protocols for Interworking: XNFS, Version 3W". + * + * Not all basic data types have their own encoding and decoding + * functions. For run-time efficiency, some data types are encoded + * or decoded inline. + */ + +static void encode_bool(struct xdr_stream *xdr, const int value) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, 4); + *p = value ? xdr_one : xdr_zero; +} + +static void encode_int32(struct xdr_stream *xdr, const s32 value) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(value); +} + +/* + * typedef opaque netobj<MAXNETOBJ_SZ> + */ +static void encode_netobj(struct xdr_stream *xdr, + const u8 *data, const unsigned int length) +{ + __be32 *p; + + BUG_ON(length > XDR_MAX_NETOBJ); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, data, length); +} + +static int decode_netobj(struct xdr_stream *xdr, + struct xdr_netobj *obj) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + if (unlikely(length > XDR_MAX_NETOBJ)) + goto out_size; + obj->len = length; + obj->data = (u8 *)p; + return 0; +out_size: + dprintk("NFS: returned netobj was too long: %u\n", length); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * netobj cookie; + */ +static void encode_cookie(struct xdr_stream *xdr, + const struct nlm_cookie *cookie) +{ + BUG_ON(cookie->len > NLM_MAXCOOKIELEN); + encode_netobj(xdr, (u8 *)&cookie->data, cookie->len); +} + +static int decode_cookie(struct xdr_stream *xdr, + struct nlm_cookie *cookie) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + /* apparently HPUX can return empty cookies */ + if (length == 0) + goto out_hpux; + if (length > NLM_MAXCOOKIELEN) + goto out_size; + p = xdr_inline_decode(xdr, length); + if (unlikely(p == NULL)) + goto out_overflow; + cookie->len = length; + memcpy(cookie->data, p, length); + return 0; +out_hpux: + cookie->len = 4; + memset(cookie->data, 0, 4); + return 0; +out_size: + dprintk("NFS: returned cookie was too long: %u\n", length); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * netobj fh; + */ +static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh) +{ + BUG_ON(fh->size > NFS3_FHSIZE); + encode_netobj(xdr, (u8 *)&fh->data, fh->size); +} + +/* + * enum nlm4_stats { + * NLM4_GRANTED = 0, + * NLM4_DENIED = 1, + * NLM4_DENIED_NOLOCKS = 2, + * NLM4_BLOCKED = 3, + * NLM4_DENIED_GRACE_PERIOD = 4, + * NLM4_DEADLCK = 5, + * NLM4_ROFS = 6, + * NLM4_STALE_FH = 7, + * NLM4_FBIG = 8, + * NLM4_FAILED = 9 + * }; + * + * struct nlm4_stat { + * nlm4_stats stat; + * }; + * + * NB: we don't swap bytes for the NLM status values. The upper + * layers deal directly with the status value in network byte + * order. + */ +static void encode_nlm4_stat(struct xdr_stream *xdr, + const __be32 stat) +{ + __be32 *p; + + BUG_ON(be32_to_cpu(stat) > NLM_FAILED); + p = xdr_reserve_space(xdr, 4); + *p = stat; +} + +static int decode_nlm4_stat(struct xdr_stream *xdr, __be32 *stat) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (unlikely(*p > nlm4_failed)) + goto out_bad_xdr; + *stat = *p; + return 0; +out_bad_xdr: + dprintk("%s: server returned invalid nlm4_stats value: %u\n", + __func__, be32_to_cpup(p)); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * struct nlm4_holder { + * bool exclusive; + * int32 svid; + * netobj oh; + * uint64 l_offset; + * uint64 l_len; + * }; + */ +static void encode_nlm4_holder(struct xdr_stream *xdr, + const struct nlm_res *result) +{ + const struct nlm_lock *lock = &result->lock; + u64 l_offset, l_len; + __be32 *p; + + encode_bool(xdr, lock->fl.fl_type == F_RDLCK); + encode_int32(xdr, lock->svid); + encode_netobj(xdr, lock->oh.data, lock->oh.len); + + p = xdr_reserve_space(xdr, 4 + 4); + nlm4_compute_offsets(lock, &l_offset, &l_len); + p = xdr_encode_hyper(p, l_offset); + xdr_encode_hyper(p, l_len); +} + +static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result) +{ + struct nlm_lock *lock = &result->lock; + struct file_lock *fl = &lock->fl; + u64 l_offset, l_len; + u32 exclusive; + int error; + __be32 *p; + s32 end; + + memset(lock, 0, sizeof(*lock)); + locks_init_lock(fl); + + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + exclusive = be32_to_cpup(p++); + lock->svid = be32_to_cpup(p); + fl->fl_pid = (pid_t)lock->svid; + + error = decode_netobj(xdr, &lock->oh); + if (unlikely(error)) + goto out; + + p = xdr_inline_decode(xdr, 8 + 8); + if (unlikely(p == NULL)) + goto out_overflow; + + fl->fl_flags = FL_POSIX; + fl->fl_type = exclusive != 0 ? F_WRLCK : F_RDLCK; + p = xdr_decode_hyper(p, &l_offset); + xdr_decode_hyper(p, &l_len); + end = l_offset + l_len - 1; + + fl->fl_start = (loff_t)l_offset; + if (l_len == 0 || end < 0) + fl->fl_end = OFFSET_MAX; + else + fl->fl_end = (loff_t)end; + error = 0; +out: + return error; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * string caller_name<LM_MAXSTRLEN>; + */ +static void encode_caller_name(struct xdr_stream *xdr, const char *name) +{ + /* NB: client-side does not set lock->len */ + u32 length = strlen(name); + __be32 *p; + + BUG_ON(length > NLM_MAXSTRLEN); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, name, length); +} + +/* + * struct nlm4_lock { + * string caller_name<LM_MAXSTRLEN>; + * netobj fh; + * netobj oh; + * int32 svid; + * uint64 l_offset; + * uint64 l_len; + * }; + */ +static void encode_nlm4_lock(struct xdr_stream *xdr, + const struct nlm_lock *lock) +{ + u64 l_offset, l_len; + __be32 *p; + + encode_caller_name(xdr, lock->caller); + encode_fh(xdr, &lock->fh); + encode_netobj(xdr, lock->oh.data, lock->oh.len); + + p = xdr_reserve_space(xdr, 4 + 8 + 8); + *p++ = cpu_to_be32(lock->svid); + + nlm4_compute_offsets(lock, &l_offset, &l_len); + p = xdr_encode_hyper(p, l_offset); + xdr_encode_hyper(p, l_len); +} + + +/* + * NLMv4 XDR encode functions + * + * NLMv4 argument types are defined in Appendix II of RFC 1813: + * "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's + * "Protocols for Interworking: XNFS, Version 3W". + */ + +/* + * struct nlm4_testargs { + * netobj cookie; + * bool exclusive; + * struct nlm4_lock alock; + * }; + */ +static void nlm4_xdr_enc_testargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_bool(xdr, lock->fl.fl_type == F_WRLCK); + encode_nlm4_lock(xdr, lock); +} + +/* + * struct nlm4_lockargs { + * netobj cookie; + * bool block; + * bool exclusive; + * struct nlm4_lock alock; + * bool reclaim; + * int state; + * }; + */ +static void nlm4_xdr_enc_lockargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_bool(xdr, args->block); + encode_bool(xdr, lock->fl.fl_type == F_WRLCK); + encode_nlm4_lock(xdr, lock); + encode_bool(xdr, args->reclaim); + encode_int32(xdr, args->state); +} + +/* + * struct nlm4_cancargs { + * netobj cookie; + * bool block; + * bool exclusive; + * struct nlm4_lock alock; + * }; + */ +static void nlm4_xdr_enc_cancargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_bool(xdr, args->block); + encode_bool(xdr, lock->fl.fl_type == F_WRLCK); + encode_nlm4_lock(xdr, lock); +} + +/* + * struct nlm4_unlockargs { + * netobj cookie; + * struct nlm4_lock alock; + * }; + */ +static void nlm4_xdr_enc_unlockargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_nlm4_lock(xdr, lock); +} + +/* + * struct nlm4_res { + * netobj cookie; + * nlm4_stat stat; + * }; + */ +static void nlm4_xdr_enc_res(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_res *result) +{ + encode_cookie(xdr, &result->cookie); + encode_nlm4_stat(xdr, result->status); +} + +/* + * union nlm4_testrply switch (nlm4_stats stat) { + * case NLM4_DENIED: + * struct nlm4_holder holder; + * default: + * void; + * }; + * + * struct nlm4_testres { + * netobj cookie; + * nlm4_testrply test_stat; + * }; + */ +static void nlm4_xdr_enc_testres(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_res *result) +{ + encode_cookie(xdr, &result->cookie); + encode_nlm4_stat(xdr, result->status); + if (result->status == nlm_lck_denied) + encode_nlm4_holder(xdr, result); +} + + +/* + * NLMv4 XDR decode functions + * + * NLMv4 argument types are defined in Appendix II of RFC 1813: + * "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's + * "Protocols for Interworking: XNFS, Version 3W". + */ + +/* + * union nlm4_testrply switch (nlm4_stats stat) { + * case NLM4_DENIED: + * struct nlm4_holder holder; + * default: + * void; + * }; + * + * struct nlm4_testres { + * netobj cookie; + * nlm4_testrply test_stat; + * }; + */ +static int decode_nlm4_testrply(struct xdr_stream *xdr, + struct nlm_res *result) +{ + int error; + + error = decode_nlm4_stat(xdr, &result->status); + if (unlikely(error)) + goto out; + if (result->status == nlm_lck_denied) + error = decode_nlm4_holder(xdr, result); +out: + return error; +} + +static int nlm4_xdr_dec_testres(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nlm_res *result) +{ + int error; + + error = decode_cookie(xdr, &result->cookie); + if (unlikely(error)) + goto out; + error = decode_nlm4_testrply(xdr, result); +out: + return error; +} + +/* + * struct nlm4_res { + * netobj cookie; + * nlm4_stat stat; + * }; + */ +static int nlm4_xdr_dec_res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nlm_res *result) +{ + int error; + + error = decode_cookie(xdr, &result->cookie); + if (unlikely(error)) + goto out; + error = decode_nlm4_stat(xdr, &result->status); +out: + return error; +} + + +/* + * For NLM, a void procedure really returns nothing + */ +#define nlm4_xdr_dec_norep NULL + +#define PROC(proc, argtype, restype) \ +[NLMPROC_##proc] = { \ + .p_proc = NLMPROC_##proc, \ + .p_encode = (kxdreproc_t)nlm4_xdr_enc_##argtype, \ + .p_decode = (kxdrdproc_t)nlm4_xdr_dec_##restype, \ + .p_arglen = NLM4_##argtype##_sz, \ + .p_replen = NLM4_##restype##_sz, \ + .p_statidx = NLMPROC_##proc, \ + .p_name = #proc, \ + } + +static struct rpc_procinfo nlm4_procedures[] = { + PROC(TEST, testargs, testres), + PROC(LOCK, lockargs, res), + PROC(CANCEL, cancargs, res), + PROC(UNLOCK, unlockargs, res), + PROC(GRANTED, testargs, res), + PROC(TEST_MSG, testargs, norep), + PROC(LOCK_MSG, lockargs, norep), + PROC(CANCEL_MSG, cancargs, norep), + PROC(UNLOCK_MSG, unlockargs, norep), + PROC(GRANTED_MSG, testargs, norep), + PROC(TEST_RES, testres, norep), + PROC(LOCK_RES, res, norep), + PROC(CANCEL_RES, res, norep), + PROC(UNLOCK_RES, res, norep), + PROC(GRANTED_RES, res, norep), +}; + +struct rpc_version nlm_version4 = { + .number = 4, + .nrprocs = ARRAY_SIZE(nlm4_procedures), + .procs = nlm4_procedures, +}; diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c index d5bb868..8d4ea83 100644 --- a/fs/lockd/clntlock.c +++ b/fs/lockd/clntlock.c @@ -14,7 +14,6 @@ #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/svc.h> #include <linux/lockd/lockd.h> -#include <linux/smp_lock.h> #include <linux/kthread.h> #define NLMDBG_FACILITY NLMDBG_CLIENT @@ -80,7 +79,7 @@ EXPORT_SYMBOL_GPL(nlmclnt_init); */ void nlmclnt_done(struct nlm_host *host) { - nlm_release_host(host); + nlmclnt_release_host(host); lockd_down(); } EXPORT_SYMBOL_GPL(nlmclnt_done); @@ -274,7 +273,7 @@ restart: spin_unlock(&nlm_blocked_lock); /* Release host handle after use */ - nlm_release_host(host); + nlmclnt_release_host(host); lockd_down(); return 0; } diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index 47ea1e1..adb45ec 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -7,7 +7,6 @@ */ #include <linux/module.h> -#include <linux/smp_lock.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/errno.h> @@ -59,7 +58,7 @@ static void nlm_put_lockowner(struct nlm_lockowner *lockowner) return; list_del(&lockowner->list); spin_unlock(&lockowner->host->h_lock); - nlm_release_host(lockowner->host); + nlmclnt_release_host(lockowner->host); kfree(lockowner); } @@ -208,22 +207,22 @@ struct nlm_rqst *nlm_alloc_call(struct nlm_host *host) printk("nlm_alloc_call: failed, waiting for memory\n"); schedule_timeout_interruptible(5*HZ); } - nlm_release_host(host); + nlmclnt_release_host(host); return NULL; } -void nlm_release_call(struct nlm_rqst *call) +void nlmclnt_release_call(struct nlm_rqst *call) { if (!atomic_dec_and_test(&call->a_count)) return; - nlm_release_host(call->a_host); + nlmclnt_release_host(call->a_host); nlmclnt_release_lockargs(call); kfree(call); } static void nlmclnt_rpc_release(void *data) { - nlm_release_call(data); + nlmclnt_release_call(data); } static int nlm_wait_on_grace(wait_queue_head_t *queue) @@ -437,7 +436,7 @@ nlmclnt_test(struct nlm_rqst *req, struct file_lock *fl) status = nlm_stat_to_errno(req->a_res.status); } out: - nlm_release_call(req); + nlmclnt_release_call(req); return status; } @@ -594,7 +593,7 @@ again: out_unblock: nlmclnt_finish_block(block); out: - nlm_release_call(req); + nlmclnt_release_call(req); return status; out_unlock: /* Fatal error: ensure that we remove the lock altogether */ @@ -695,7 +694,7 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl) /* What to do now? I'm out of my depth... */ status = -ENOLCK; out: - nlm_release_call(req); + nlmclnt_release_call(req); return status; } @@ -756,7 +755,7 @@ static int nlmclnt_cancel(struct nlm_host *host, int block, struct file_lock *fl NLMPROC_CANCEL, &nlmclnt_cancel_ops); if (status == 0 && req->a_res.status == nlm_lck_denied) status = -ENOLCK; - nlm_release_call(req); + nlmclnt_release_call(req); return status; } diff --git a/fs/lockd/clntxdr.c b/fs/lockd/clntxdr.c new file mode 100644 index 0000000..180ac34 --- /dev/null +++ b/fs/lockd/clntxdr.c @@ -0,0 +1,627 @@ +/* + * linux/fs/lockd/clntxdr.c + * + * XDR functions to encode/decode NLM version 3 RPC arguments and results. + * NLM version 3 is backwards compatible with NLM versions 1 and 2. + * + * NLM client-side only. + * + * Copyright (C) 2010, Oracle. All rights reserved. + */ + +#include <linux/types.h> +#include <linux/sunrpc/xdr.h> +#include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/stats.h> +#include <linux/lockd/lockd.h> + +#define NLMDBG_FACILITY NLMDBG_XDR + +#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) +# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" +#endif + +/* + * Declare the space requirements for NLM arguments and replies as + * number of 32bit-words + */ +#define NLM_cookie_sz (1+(NLM_MAXCOOKIELEN>>2)) +#define NLM_caller_sz (1+(NLMCLNT_OHSIZE>>2)) +#define NLM_owner_sz (1+(NLMCLNT_OHSIZE>>2)) +#define NLM_fhandle_sz (1+(NFS2_FHSIZE>>2)) +#define NLM_lock_sz (3+NLM_caller_sz+NLM_owner_sz+NLM_fhandle_sz) +#define NLM_holder_sz (4+NLM_owner_sz) + +#define NLM_testargs_sz (NLM_cookie_sz+1+NLM_lock_sz) +#define NLM_lockargs_sz (NLM_cookie_sz+4+NLM_lock_sz) +#define NLM_cancargs_sz (NLM_cookie_sz+2+NLM_lock_sz) +#define NLM_unlockargs_sz (NLM_cookie_sz+NLM_lock_sz) + +#define NLM_testres_sz (NLM_cookie_sz+1+NLM_holder_sz) +#define NLM_res_sz (NLM_cookie_sz+1) +#define NLM_norep_sz (0) + + +static s32 loff_t_to_s32(loff_t offset) +{ + s32 res; + + if (offset >= NLM_OFFSET_MAX) + res = NLM_OFFSET_MAX; + else if (offset <= -NLM_OFFSET_MAX) + res = -NLM_OFFSET_MAX; + else + res = offset; + return res; +} + +static void nlm_compute_offsets(const struct nlm_lock *lock, + u32 *l_offset, u32 *l_len) +{ + const struct file_lock *fl = &lock->fl; + + BUG_ON(fl->fl_start > NLM_OFFSET_MAX); + BUG_ON(fl->fl_end > NLM_OFFSET_MAX && + fl->fl_end != OFFSET_MAX); + + *l_offset = loff_t_to_s32(fl->fl_start); + if (fl->fl_end == OFFSET_MAX) + *l_len = 0; + else + *l_len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1); +} + +/* + * Handle decode buffer overflows out-of-line. + */ +static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) +{ + dprintk("lockd: %s prematurely hit the end of our receive buffer. " + "Remaining buffer length is %tu words.\n", + func, xdr->end - xdr->p); +} + + +/* + * Encode/decode NLMv3 basic data types + * + * Basic NLMv3 data types are not defined in an IETF standards + * document. X/Open has a description of these data types that + * is useful. See Chapter 10 of "Protocols for Interworking: + * XNFS, Version 3W". + * + * Not all basic data types have their own encoding and decoding + * functions. For run-time efficiency, some data types are encoded + * or decoded inline. + */ + +static void encode_bool(struct xdr_stream *xdr, const int value) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, 4); + *p = value ? xdr_one : xdr_zero; +} + +static void encode_int32(struct xdr_stream *xdr, const s32 value) +{ + __be32 *p; + + p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(value); +} + +/* + * typedef opaque netobj<MAXNETOBJ_SZ> + */ +static void encode_netobj(struct xdr_stream *xdr, + const u8 *data, const unsigned int length) +{ + __be32 *p; + + BUG_ON(length > XDR_MAX_NETOBJ); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, data, length); +} + +static int decode_netobj(struct xdr_stream *xdr, + struct xdr_netobj *obj) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + if (unlikely(length > XDR_MAX_NETOBJ)) + goto out_size; + obj->len = length; + obj->data = (u8 *)p; + return 0; +out_size: + dprintk("NFS: returned netobj was too long: %u\n", length); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * netobj cookie; + */ +static void encode_cookie(struct xdr_stream *xdr, + const struct nlm_cookie *cookie) +{ + BUG_ON(cookie->len > NLM_MAXCOOKIELEN); + encode_netobj(xdr, (u8 *)&cookie->data, cookie->len); +} + +static int decode_cookie(struct xdr_stream *xdr, + struct nlm_cookie *cookie) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + /* apparently HPUX can return empty cookies */ + if (length == 0) + goto out_hpux; + if (length > NLM_MAXCOOKIELEN) + goto out_size; + p = xdr_inline_decode(xdr, length); + if (unlikely(p == NULL)) + goto out_overflow; + cookie->len = length; + memcpy(cookie->data, p, length); + return 0; +out_hpux: + cookie->len = 4; + memset(cookie->data, 0, 4); + return 0; +out_size: + dprintk("NFS: returned cookie was too long: %u\n", length); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * netobj fh; + */ +static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh) +{ + BUG_ON(fh->size != NFS2_FHSIZE); + encode_netobj(xdr, (u8 *)&fh->data, NFS2_FHSIZE); +} + +/* + * enum nlm_stats { + * LCK_GRANTED = 0, + * LCK_DENIED = 1, + * LCK_DENIED_NOLOCKS = 2, + * LCK_BLOCKED = 3, + * LCK_DENIED_GRACE_PERIOD = 4 + * }; + * + * + * struct nlm_stat { + * nlm_stats stat; + * }; + * + * NB: we don't swap bytes for the NLM status values. The upper + * layers deal directly with the status value in network byte + * order. + */ + +static void encode_nlm_stat(struct xdr_stream *xdr, + const __be32 stat) +{ + __be32 *p; + + BUG_ON(be32_to_cpu(stat) > NLM_LCK_DENIED_GRACE_PERIOD); + p = xdr_reserve_space(xdr, 4); + *p = stat; +} + +static int decode_nlm_stat(struct xdr_stream *xdr, + __be32 *stat) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (unlikely(*p > nlm_lck_denied_grace_period)) + goto out_enum; + *stat = *p; + return 0; +out_enum: + dprintk("%s: server returned invalid nlm_stats value: %u\n", + __func__, be32_to_cpup(p)); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * struct nlm_holder { + * bool exclusive; + * int uppid; + * netobj oh; + * unsigned l_offset; + * unsigned l_len; + * }; + */ +static void encode_nlm_holder(struct xdr_stream *xdr, + const struct nlm_res *result) +{ + const struct nlm_lock *lock = &result->lock; + u32 l_offset, l_len; + __be32 *p; + + encode_bool(xdr, lock->fl.fl_type == F_RDLCK); + encode_int32(xdr, lock->svid); + encode_netobj(xdr, lock->oh.data, lock->oh.len); + + p = xdr_reserve_space(xdr, 4 + 4); + nlm_compute_offsets(lock, &l_offset, &l_len); + *p++ = cpu_to_be32(l_offset); + *p = cpu_to_be32(l_len); +} + +static int decode_nlm_holder(struct xdr_stream *xdr, struct nlm_res *result) +{ + struct nlm_lock *lock = &result->lock; + struct file_lock *fl = &lock->fl; + u32 exclusive, l_offset, l_len; + int error; + __be32 *p; + s32 end; + + memset(lock, 0, sizeof(*lock)); + locks_init_lock(fl); + + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + exclusive = be32_to_cpup(p++); + lock->svid = be32_to_cpup(p); + fl->fl_pid = (pid_t)lock->svid; + + error = decode_netobj(xdr, &lock->oh); + if (unlikely(error)) + goto out; + + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + + fl->fl_flags = FL_POSIX; + fl->fl_type = exclusive != 0 ? F_WRLCK : F_RDLCK; + l_offset = be32_to_cpup(p++); + l_len = be32_to_cpup(p); + end = l_offset + l_len - 1; + + fl->fl_start = (loff_t)l_offset; + if (l_len == 0 || end < 0) + fl->fl_end = OFFSET_MAX; + else + fl->fl_end = (loff_t)end; + error = 0; +out: + return error; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * string caller_name<LM_MAXSTRLEN>; + */ +static void encode_caller_name(struct xdr_stream *xdr, const char *name) +{ + /* NB: client-side does not set lock->len */ + u32 length = strlen(name); + __be32 *p; + + BUG_ON(length > NLM_MAXSTRLEN); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, name, length); +} + +/* + * struct nlm_lock { + * string caller_name<LM_MAXSTRLEN>; + * netobj fh; + * netobj oh; + * int uppid; + * unsigned l_offset; + * unsigned l_len; + * }; + */ +static void encode_nlm_lock(struct xdr_stream *xdr, + const struct nlm_lock *lock) +{ + u32 l_offset, l_len; + __be32 *p; + + encode_caller_name(xdr, lock->caller); + encode_fh(xdr, &lock->fh); + encode_netobj(xdr, lock->oh.data, lock->oh.len); + + p = xdr_reserve_space(xdr, 4 + 4 + 4); + *p++ = cpu_to_be32(lock->svid); + + nlm_compute_offsets(lock, &l_offset, &l_len); + *p++ = cpu_to_be32(l_offset); + *p = cpu_to_be32(l_len); +} + + +/* + * NLMv3 XDR encode functions + * + * NLMv3 argument types are defined in Chapter 10 of The Open Group's + * "Protocols for Interworking: XNFS, Version 3W". + */ + +/* + * struct nlm_testargs { + * netobj cookie; + * bool exclusive; + * struct nlm_lock alock; + * }; + */ +static void nlm_xdr_enc_testargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_bool(xdr, lock->fl.fl_type == F_WRLCK); + encode_nlm_lock(xdr, lock); +} + +/* + * struct nlm_lockargs { + * netobj cookie; + * bool block; + * bool exclusive; + * struct nlm_lock alock; + * bool reclaim; + * int state; + * }; + */ +static void nlm_xdr_enc_lockargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_bool(xdr, args->block); + encode_bool(xdr, lock->fl.fl_type == F_WRLCK); + encode_nlm_lock(xdr, lock); + encode_bool(xdr, args->reclaim); + encode_int32(xdr, args->state); +} + +/* + * struct nlm_cancargs { + * netobj cookie; + * bool block; + * bool exclusive; + * struct nlm_lock alock; + * }; + */ +static void nlm_xdr_enc_cancargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_bool(xdr, args->block); + encode_bool(xdr, lock->fl.fl_type == F_WRLCK); + encode_nlm_lock(xdr, lock); +} + +/* + * struct nlm_unlockargs { + * netobj cookie; + * struct nlm_lock alock; + * }; + */ +static void nlm_xdr_enc_unlockargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_args *args) +{ + const struct nlm_lock *lock = &args->lock; + + encode_cookie(xdr, &args->cookie); + encode_nlm_lock(xdr, lock); +} + +/* + * struct nlm_res { + * netobj cookie; + * nlm_stat stat; + * }; + */ +static void nlm_xdr_enc_res(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_res *result) +{ + encode_cookie(xdr, &result->cookie); + encode_nlm_stat(xdr, result->status); +} + +/* + * union nlm_testrply switch (nlm_stats stat) { + * case LCK_DENIED: + * struct nlm_holder holder; + * default: + * void; + * }; + * + * struct nlm_testres { + * netobj cookie; + * nlm_testrply test_stat; + * }; + */ +static void encode_nlm_testrply(struct xdr_stream *xdr, + const struct nlm_res *result) +{ + if (result->status == nlm_lck_denied) + encode_nlm_holder(xdr, result); +} + +static void nlm_xdr_enc_testres(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nlm_res *result) +{ + encode_cookie(xdr, &result->cookie); + encode_nlm_stat(xdr, result->status); + encode_nlm_testrply(xdr, result); +} + + +/* + * NLMv3 XDR decode functions + * + * NLMv3 result types are defined in Chapter 10 of The Open Group's + * "Protocols for Interworking: XNFS, Version 3W". + */ + +/* + * union nlm_testrply switch (nlm_stats stat) { + * case LCK_DENIED: + * struct nlm_holder holder; + * default: + * void; + * }; + * + * struct nlm_testres { + * netobj cookie; + * nlm_testrply test_stat; + * }; + */ +static int decode_nlm_testrply(struct xdr_stream *xdr, + struct nlm_res *result) +{ + int error; + + error = decode_nlm_stat(xdr, &result->status); + if (unlikely(error)) + goto out; + if (result->status == nlm_lck_denied) + error = decode_nlm_holder(xdr, result); +out: + return error; +} + +static int nlm_xdr_dec_testres(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nlm_res *result) +{ + int error; + + error = decode_cookie(xdr, &result->cookie); + if (unlikely(error)) + goto out; + error = decode_nlm_testrply(xdr, result); +out: + return error; +} + +/* + * struct nlm_res { + * netobj cookie; + * nlm_stat stat; + * }; + */ +static int nlm_xdr_dec_res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nlm_res *result) +{ + int error; + + error = decode_cookie(xdr, &result->cookie); + if (unlikely(error)) + goto out; + error = decode_nlm_stat(xdr, &result->status); +out: + return error; +} + + +/* + * For NLM, a void procedure really returns nothing + */ +#define nlm_xdr_dec_norep NULL + +#define PROC(proc, argtype, restype) \ +[NLMPROC_##proc] = { \ + .p_proc = NLMPROC_##proc, \ + .p_encode = (kxdreproc_t)nlm_xdr_enc_##argtype, \ + .p_decode = (kxdrdproc_t)nlm_xdr_dec_##restype, \ + .p_arglen = NLM_##argtype##_sz, \ + .p_replen = NLM_##restype##_sz, \ + .p_statidx = NLMPROC_##proc, \ + .p_name = #proc, \ + } + +static struct rpc_procinfo nlm_procedures[] = { + PROC(TEST, testargs, testres), + PROC(LOCK, lockargs, res), + PROC(CANCEL, cancargs, res), + PROC(UNLOCK, unlockargs, res), + PROC(GRANTED, testargs, res), + PROC(TEST_MSG, testargs, norep), + PROC(LOCK_MSG, lockargs, norep), + PROC(CANCEL_MSG, cancargs, norep), + PROC(UNLOCK_MSG, unlockargs, norep), + PROC(GRANTED_MSG, testargs, norep), + PROC(TEST_RES, testres, norep), + PROC(LOCK_RES, res, norep), + PROC(CANCEL_RES, res, norep), + PROC(UNLOCK_RES, res, norep), + PROC(GRANTED_RES, res, norep), +}; + +static struct rpc_version nlm_version1 = { + .number = 1, + .nrprocs = ARRAY_SIZE(nlm_procedures), + .procs = nlm_procedures, +}; + +static struct rpc_version nlm_version3 = { + .number = 3, + .nrprocs = ARRAY_SIZE(nlm_procedures), + .procs = nlm_procedures, +}; + +static struct rpc_version *nlm_versions[] = { + [1] = &nlm_version1, + [3] = &nlm_version3, +#ifdef CONFIG_LOCKD_V4 + [4] = &nlm_version4, +#endif +}; + +static struct rpc_stat nlm_rpc_stats; + +struct rpc_program nlm_program = { + .name = "lockd", + .number = NLM_PROGRAM, + .nrvers = ARRAY_SIZE(nlm_versions), + .version = nlm_versions, + .stats = &nlm_rpc_stats, +}; diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 25e21e4..5f1bcb2 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -25,9 +25,22 @@ #define NLM_HOST_EXPIRE (300 * HZ) #define NLM_HOST_COLLECT (120 * HZ) -static struct hlist_head nlm_hosts[NLM_HOST_NRHASH]; +static struct hlist_head nlm_server_hosts[NLM_HOST_NRHASH]; +static struct hlist_head nlm_client_hosts[NLM_HOST_NRHASH]; + +#define for_each_host(host, pos, chain, table) \ + for ((chain) = (table); \ + (chain) < (table) + NLM_HOST_NRHASH; ++(chain)) \ + hlist_for_each_entry((host), (pos), (chain), h_hash) + +#define for_each_host_safe(host, pos, next, chain, table) \ + for ((chain) = (table); \ + (chain) < (table) + NLM_HOST_NRHASH; ++(chain)) \ + hlist_for_each_entry_safe((host), (pos), (next), \ + (chain), h_hash) + static unsigned long next_gc; -static int nrhosts; +static unsigned long nrhosts; static DEFINE_MUTEX(nlm_host_mutex); static void nlm_gc_hosts(void); @@ -40,8 +53,6 @@ struct nlm_lookup_host_info { const u32 version; /* NLM version to search for */ const char *hostname; /* remote's hostname */ const size_t hostname_len; /* it's length */ - const struct sockaddr *src_sap; /* our address (optional) */ - const size_t src_len; /* it's length */ const int noresvport; /* use non-priv port */ }; @@ -88,126 +99,83 @@ static unsigned int nlm_hash_address(const struct sockaddr *sap) } /* - * Common host lookup routine for server & client + * Allocate and initialize an nlm_host. Common to both client and server. */ -static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni) +static struct nlm_host *nlm_alloc_host(struct nlm_lookup_host_info *ni, + struct nsm_handle *nsm) { - struct hlist_head *chain; - struct hlist_node *pos; - struct nlm_host *host; - struct nsm_handle *nsm = NULL; - - mutex_lock(&nlm_host_mutex); + struct nlm_host *host = NULL; + unsigned long now = jiffies; - if (time_after_eq(jiffies, next_gc)) - nlm_gc_hosts(); - - /* We may keep several nlm_host objects for a peer, because each - * nlm_host is identified by - * (address, protocol, version, server/client) - * We could probably simplify this a little by putting all those - * different NLM rpc_clients into one single nlm_host object. - * This would allow us to have one nlm_host per address. - */ - chain = &nlm_hosts[nlm_hash_address(ni->sap)]; - hlist_for_each_entry(host, pos, chain, h_hash) { - if (!rpc_cmp_addr(nlm_addr(host), ni->sap)) - continue; - - /* See if we have an NSM handle for this client */ - if (!nsm) - nsm = host->h_nsmhandle; - - if (host->h_proto != ni->protocol) - continue; - if (host->h_version != ni->version) - continue; - if (host->h_server != ni->server) - continue; - if (ni->server && - !rpc_cmp_addr(nlm_srcaddr(host), ni->src_sap)) - continue; - - /* Move to head of hash chain. */ - hlist_del(&host->h_hash); - hlist_add_head(&host->h_hash, chain); - - nlm_get_host(host); - dprintk("lockd: nlm_lookup_host found host %s (%s)\n", - host->h_name, host->h_addrbuf); - goto out; - } - - /* - * The host wasn't in our hash table. If we don't - * have an NSM handle for it yet, create one. - */ - if (nsm) + if (nsm != NULL) atomic_inc(&nsm->sm_count); else { host = NULL; nsm = nsm_get_handle(ni->sap, ni->salen, ni->hostname, ni->hostname_len); - if (!nsm) { - dprintk("lockd: nlm_lookup_host failed; " - "no nsm handle\n"); + if (unlikely(nsm == NULL)) { + dprintk("lockd: %s failed; no nsm handle\n", + __func__); goto out; } } - host = kzalloc(sizeof(*host), GFP_KERNEL); - if (!host) { + host = kmalloc(sizeof(*host), GFP_KERNEL); + if (unlikely(host == NULL)) { + dprintk("lockd: %s failed; no memory\n", __func__); nsm_release(nsm); - dprintk("lockd: nlm_lookup_host failed; no memory\n"); goto out; } - host->h_name = nsm->sm_name; - host->h_addrbuf = nsm->sm_addrbuf; + memcpy(nlm_addr(host), ni->sap, ni->salen); - host->h_addrlen = ni->salen; + host->h_addrlen = ni->salen; rpc_set_port(nlm_addr(host), 0); - memcpy(nlm_srcaddr(host), ni->src_sap, ni->src_len); + host->h_srcaddrlen = 0; + + host->h_rpcclnt = NULL; + host->h_name = nsm->sm_name; host->h_version = ni->version; host->h_proto = ni->protocol; - host->h_rpcclnt = NULL; - mutex_init(&host->h_mutex); - host->h_nextrebind = jiffies + NLM_HOST_REBIND; - host->h_expires = jiffies + NLM_HOST_EXPIRE; - atomic_set(&host->h_count, 1); + host->h_reclaiming = 0; + host->h_server = ni->server; + host->h_noresvport = ni->noresvport; + host->h_inuse = 0; init_waitqueue_head(&host->h_gracewait); init_rwsem(&host->h_rwsem); - host->h_state = 0; /* pseudo NSM state */ - host->h_nsmstate = 0; /* real NSM state */ - host->h_nsmhandle = nsm; - host->h_server = ni->server; - host->h_noresvport = ni->noresvport; - hlist_add_head(&host->h_hash, chain); + host->h_state = 0; + host->h_nsmstate = 0; + host->h_pidcount = 0; + atomic_set(&host->h_count, 1); + mutex_init(&host->h_mutex); + host->h_nextrebind = now + NLM_HOST_REBIND; + host->h_expires = now + NLM_HOST_EXPIRE; INIT_LIST_HEAD(&host->h_lockowners); spin_lock_init(&host->h_lock); INIT_LIST_HEAD(&host->h_granted); INIT_LIST_HEAD(&host->h_reclaim); - - nrhosts++; - - dprintk("lockd: nlm_lookup_host created host %s\n", - host->h_name); + host->h_nsmhandle = nsm; + host->h_addrbuf = nsm->sm_addrbuf; out: - mutex_unlock(&nlm_host_mutex); return host; } /* - * Destroy a host + * Destroy an nlm_host and free associated resources + * + * Caller must hold nlm_host_mutex. */ -static void -nlm_destroy_host(struct nlm_host *host) +static void nlm_destroy_host_locked(struct nlm_host *host) { struct rpc_clnt *clnt; + dprintk("lockd: destroy host %s\n", host->h_name); + BUG_ON(!list_empty(&host->h_lockowners)); BUG_ON(atomic_read(&host->h_count)); + hlist_del_init(&host->h_hash); + nsm_unmonitor(host); nsm_release(host->h_nsmhandle); @@ -215,6 +183,8 @@ nlm_destroy_host(struct nlm_host *host) if (clnt != NULL) rpc_shutdown_client(clnt); kfree(host); + + nrhosts--; } /** @@ -238,9 +208,6 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, const char *hostname, int noresvport) { - const struct sockaddr source = { - .sa_family = AF_UNSPEC, - }; struct nlm_lookup_host_info ni = { .server = 0, .sap = sap, @@ -249,16 +216,78 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap, .version = version, .hostname = hostname, .hostname_len = strlen(hostname), - .src_sap = &source, - .src_len = sizeof(source), .noresvport = noresvport, }; + struct hlist_head *chain; + struct hlist_node *pos; + struct nlm_host *host; + struct nsm_handle *nsm = NULL; dprintk("lockd: %s(host='%s', vers=%u, proto=%s)\n", __func__, (hostname ? hostname : "<none>"), version, (protocol == IPPROTO_UDP ? "udp" : "tcp")); - return nlm_lookup_host(&ni); + mutex_lock(&nlm_host_mutex); + + chain = &nlm_client_hosts[nlm_hash_address(sap)]; + hlist_for_each_entry(host, pos, chain, h_hash) { + if (!rpc_cmp_addr(nlm_addr(host), sap)) + continue; + + /* Same address. Share an NSM handle if we already have one */ + if (nsm == NULL) + nsm = host->h_nsmhandle; + + if (host->h_proto != protocol) + continue; + if (host->h_version != version) + continue; + + nlm_get_host(host); + dprintk("lockd: %s found host %s (%s)\n", __func__, + host->h_name, host->h_addrbuf); + goto out; + } + + host = nlm_alloc_host(&ni, nsm); + if (unlikely(host == NULL)) + goto out; + + hlist_add_head(&host->h_hash, chain); + nrhosts++; + + dprintk("lockd: %s created host %s (%s)\n", __func__, + host->h_name, host->h_addrbuf); + +out: + mutex_unlock(&nlm_host_mutex); + return host; +} + +/** + * nlmclnt_release_host - release client nlm_host + * @host: nlm_host to release + * + */ +void nlmclnt_release_host(struct nlm_host *host) +{ + if (host == NULL) + return; + + dprintk("lockd: release client host %s\n", host->h_name); + + BUG_ON(atomic_read(&host->h_count) < 0); + BUG_ON(host->h_server); + + if (atomic_dec_and_test(&host->h_count)) { + BUG_ON(!list_empty(&host->h_lockowners)); + BUG_ON(!list_empty(&host->h_granted)); + BUG_ON(!list_empty(&host->h_reclaim)); + + mutex_lock(&nlm_host_mutex); + nlm_destroy_host_locked(host); + mutex_unlock(&nlm_host_mutex); + } } /** @@ -283,12 +312,18 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, const char *hostname, const size_t hostname_len) { + struct hlist_head *chain; + struct hlist_node *pos; + struct nlm_host *host = NULL; + struct nsm_handle *nsm = NULL; struct sockaddr_in sin = { .sin_family = AF_INET, }; struct sockaddr_in6 sin6 = { .sin6_family = AF_INET6, }; + struct sockaddr *src_sap; + size_t src_len = rqstp->rq_addrlen; struct nlm_lookup_host_info ni = { .server = 1, .sap = svc_addr(rqstp), @@ -297,27 +332,91 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp, .version = rqstp->rq_vers, .hostname = hostname, .hostname_len = hostname_len, - .src_len = rqstp->rq_addrlen, }; dprintk("lockd: %s(host='%*s', vers=%u, proto=%s)\n", __func__, (int)hostname_len, hostname, rqstp->rq_vers, (rqstp->rq_prot == IPPROTO_UDP ? "udp" : "tcp")); + mutex_lock(&nlm_host_mutex); + switch (ni.sap->sa_family) { case AF_INET: sin.sin_addr.s_addr = rqstp->rq_daddr.addr.s_addr; - ni.src_sap = (struct sockaddr *)&sin; + src_sap = (struct sockaddr *)&sin; break; case AF_INET6: ipv6_addr_copy(&sin6.sin6_addr, &rqstp->rq_daddr.addr6); - ni.src_sap = (struct sockaddr *)&sin6; + src_sap = (struct sockaddr *)&sin6; break; default: - return NULL; + dprintk("lockd: %s failed; unrecognized address family\n", + __func__); + goto out; } - return nlm_lookup_host(&ni); + if (time_after_eq(jiffies, next_gc)) + nlm_gc_hosts(); + + chain = &nlm_server_hosts[nlm_hash_address(ni.sap)]; + hlist_for_each_entry(host, pos, chain, h_hash) { + if (!rpc_cmp_addr(nlm_addr(host), ni.sap)) + continue; + + /* Same address. Share an NSM handle if we already have one */ + if (nsm == NULL) + nsm = host->h_nsmhandle; + + if (host->h_proto != ni.protocol) + continue; + if (host->h_version != ni.version) + continue; + if (!rpc_cmp_addr(nlm_srcaddr(host), src_sap)) + continue; + + /* Move to head of hash chain. */ + hlist_del(&host->h_hash); + hlist_add_head(&host->h_hash, chain); + + nlm_get_host(host); + dprintk("lockd: %s found host %s (%s)\n", + __func__, host->h_name, host->h_addrbuf); + goto out; + } + + host = nlm_alloc_host(&ni, nsm); + if (unlikely(host == NULL)) + goto out; + + memcpy(nlm_srcaddr(host), src_sap, src_len); + host->h_srcaddrlen = src_len; + hlist_add_head(&host->h_hash, chain); + nrhosts++; + + dprintk("lockd: %s created host %s (%s)\n", + __func__, host->h_name, host->h_addrbuf); + +out: + mutex_unlock(&nlm_host_mutex); + return host; +} + +/** + * nlmsvc_release_host - release server nlm_host + * @host: nlm_host to release + * + * Host is destroyed later in nlm_gc_host(). + */ +void nlmsvc_release_host(struct nlm_host *host) +{ + if (host == NULL) + return; + + dprintk("lockd: release server host %s\n", host->h_name); + + BUG_ON(atomic_read(&host->h_count) < 0); + BUG_ON(!host->h_server); + atomic_dec(&host->h_count); } /* @@ -357,7 +456,6 @@ nlm_bind_host(struct nlm_host *host) .protocol = host->h_proto, .address = nlm_addr(host), .addrsize = host->h_addrlen, - .saddress = nlm_srcaddr(host), .timeout = &timeparms, .servername = host->h_name, .program = &nlm_program, @@ -376,6 +474,8 @@ nlm_bind_host(struct nlm_host *host) args.flags |= RPC_CLNT_CREATE_HARDRTRY; if (host->h_noresvport) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; + if (host->h_srcaddrlen) + args.saddress = nlm_srcaddr(host); clnt = rpc_create(&args); if (!IS_ERR(clnt)) @@ -416,20 +516,28 @@ struct nlm_host * nlm_get_host(struct nlm_host *host) return host; } -/* - * Release NLM host after use - */ -void nlm_release_host(struct nlm_host *host) +static struct nlm_host *next_host_state(struct hlist_head *cache, + struct nsm_handle *nsm, + const struct nlm_reboot *info) { - if (host != NULL) { - dprintk("lockd: release host %s\n", host->h_name); - BUG_ON(atomic_read(&host->h_count) < 0); - if (atomic_dec_and_test(&host->h_count)) { - BUG_ON(!list_empty(&host->h_lockowners)); - BUG_ON(!list_empty(&host->h_granted)); - BUG_ON(!list_empty(&host->h_reclaim)); + struct nlm_host *host = NULL; + struct hlist_head *chain; + struct hlist_node *pos; + + mutex_lock(&nlm_host_mutex); + for_each_host(host, pos, chain, cache) { + if (host->h_nsmhandle == nsm + && host->h_nsmstate != info->state) { + host->h_nsmstate = info->state; + host->h_state++; + + nlm_get_host(host); + goto out; } } +out: + mutex_unlock(&nlm_host_mutex); + return host; } /** @@ -441,8 +549,6 @@ void nlm_release_host(struct nlm_host *host) */ void nlm_host_rebooted(const struct nlm_reboot *info) { - struct hlist_head *chain; - struct hlist_node *pos; struct nsm_handle *nsm; struct nlm_host *host; @@ -455,32 +561,15 @@ void nlm_host_rebooted(const struct nlm_reboot *info) * lock for this. * To avoid processing a host several times, we match the nsmstate. */ -again: mutex_lock(&nlm_host_mutex); - for (chain = nlm_hosts; chain < nlm_hosts + NLM_HOST_NRHASH; ++chain) { - hlist_for_each_entry(host, pos, chain, h_hash) { - if (host->h_nsmhandle == nsm - && host->h_nsmstate != info->state) { - host->h_nsmstate = info->state; - host->h_state++; - - nlm_get_host(host); - mutex_unlock(&nlm_host_mutex); - - if (host->h_server) { - /* We're server for this guy, just ditch - * all the locks he held. */ - nlmsvc_free_host_resources(host); - } else { - /* He's the server, initiate lock recovery. */ - nlmclnt_recovery(host); - } - - nlm_release_host(host); - goto again; - } - } + while ((host = next_host_state(nlm_server_hosts, nsm, info)) != NULL) { + nlmsvc_free_host_resources(host); + nlmsvc_release_host(host); } - mutex_unlock(&nlm_host_mutex); + while ((host = next_host_state(nlm_client_hosts, nsm, info)) != NULL) { + nlmclnt_recovery(host); + nlmclnt_release_host(host); + } + nsm_release(nsm); } @@ -500,13 +589,11 @@ nlm_shutdown_hosts(void) /* First, make all hosts eligible for gc */ dprintk("lockd: nuking all hosts...\n"); - for (chain = nlm_hosts; chain < nlm_hosts + NLM_HOST_NRHASH; ++chain) { - hlist_for_each_entry(host, pos, chain, h_hash) { - host->h_expires = jiffies - 1; - if (host->h_rpcclnt) { - rpc_shutdown_client(host->h_rpcclnt); - host->h_rpcclnt = NULL; - } + for_each_host(host, pos, chain, nlm_server_hosts) { + host->h_expires = jiffies - 1; + if (host->h_rpcclnt) { + rpc_shutdown_client(host->h_rpcclnt); + host->h_rpcclnt = NULL; } } @@ -515,15 +602,13 @@ nlm_shutdown_hosts(void) mutex_unlock(&nlm_host_mutex); /* complain if any hosts are left */ - if (nrhosts) { + if (nrhosts != 0) { printk(KERN_WARNING "lockd: couldn't shutdown host module!\n"); - dprintk("lockd: %d hosts left:\n", nrhosts); - for (chain = nlm_hosts; chain < nlm_hosts + NLM_HOST_NRHASH; ++chain) { - hlist_for_each_entry(host, pos, chain, h_hash) { - dprintk(" %s (cnt %d use %d exp %ld)\n", - host->h_name, atomic_read(&host->h_count), - host->h_inuse, host->h_expires); - } + dprintk("lockd: %lu hosts left:\n", nrhosts); + for_each_host(host, pos, chain, nlm_server_hosts) { + dprintk(" %s (cnt %d use %d exp %ld)\n", + host->h_name, atomic_read(&host->h_count), + host->h_inuse, host->h_expires); } } } @@ -541,29 +626,22 @@ nlm_gc_hosts(void) struct nlm_host *host; dprintk("lockd: host garbage collection\n"); - for (chain = nlm_hosts; chain < nlm_hosts + NLM_HOST_NRHASH; ++chain) { - hlist_for_each_entry(host, pos, chain, h_hash) - host->h_inuse = 0; - } + for_each_host(host, pos, chain, nlm_server_hosts) + host->h_inuse = 0; /* Mark all hosts that hold locks, blocks or shares */ nlmsvc_mark_resources(); - for (chain = nlm_hosts; chain < nlm_hosts + NLM_HOST_NRHASH; ++chain) { - hlist_for_each_entry_safe(host, pos, next, chain, h_hash) { - if (atomic_read(&host->h_count) || host->h_inuse - || time_before(jiffies, host->h_expires)) { - dprintk("nlm_gc_hosts skipping %s (cnt %d use %d exp %ld)\n", - host->h_name, atomic_read(&host->h_count), - host->h_inuse, host->h_expires); - continue; - } - dprintk("lockd: delete host %s\n", host->h_name); - hlist_del_init(&host->h_hash); - - nlm_destroy_host(host); - nrhosts--; + for_each_host_safe(host, pos, next, chain, nlm_server_hosts) { + if (atomic_read(&host->h_count) || host->h_inuse + || time_before(jiffies, host->h_expires)) { + dprintk("nlm_gc_hosts skipping %s " + "(cnt %d use %d exp %ld)\n", + host->h_name, atomic_read(&host->h_count), + host->h_inuse, host->h_expires); + continue; } + nlm_destroy_host_locked(host); } next_gc = jiffies + NLM_HOST_COLLECT; diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index e0c9189..23d7451 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -401,26 +401,22 @@ void nsm_release(struct nsm_handle *nsm) * Status Monitor wire protocol. */ -static int encode_nsm_string(struct xdr_stream *xdr, const char *string) +static void encode_nsm_string(struct xdr_stream *xdr, const char *string) { const u32 len = strlen(string); __be32 *p; - if (unlikely(len > SM_MAXSTRLEN)) - return -EIO; - p = xdr_reserve_space(xdr, sizeof(u32) + len); - if (unlikely(p == NULL)) - return -EIO; + BUG_ON(len > SM_MAXSTRLEN); + p = xdr_reserve_space(xdr, 4 + len); xdr_encode_opaque(p, string, len); - return 0; } /* * "mon_name" specifies the host to be monitored. */ -static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) +static void encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) { - return encode_nsm_string(xdr, argp->mon_name); + encode_nsm_string(xdr, argp->mon_name); } /* @@ -429,35 +425,25 @@ static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp) * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name" * has changed. */ -static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) +static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp) { - int status; __be32 *p; - status = encode_nsm_string(xdr, utsname()->nodename); - if (unlikely(status != 0)) - return status; - p = xdr_reserve_space(xdr, 3 * sizeof(u32)); - if (unlikely(p == NULL)) - return -EIO; - *p++ = htonl(argp->prog); - *p++ = htonl(argp->vers); - *p++ = htonl(argp->proc); - return 0; + encode_nsm_string(xdr, utsname()->nodename); + p = xdr_reserve_space(xdr, 4 + 4 + 4); + *p++ = cpu_to_be32(argp->prog); + *p++ = cpu_to_be32(argp->vers); + *p = cpu_to_be32(argp->proc); } /* * The "mon_id" argument specifies the non-private arguments * of an NSMPROC_MON or NSMPROC_UNMON call. */ -static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) +static void encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) { - int status; - - status = encode_mon_name(xdr, argp); - if (unlikely(status != 0)) - return status; - return encode_my_id(xdr, argp); + encode_mon_name(xdr, argp); + encode_my_id(xdr, argp); } /* @@ -465,68 +451,56 @@ static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp) * by the NSMPROC_MON call. This information will be supplied in the * NLMPROC_SM_NOTIFY call. */ -static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) +static void encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp) { __be32 *p; p = xdr_reserve_space(xdr, SM_PRIV_SIZE); - if (unlikely(p == NULL)) - return -EIO; xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE); - return 0; } -static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p, - const struct nsm_args *argp) +static void nsm_xdr_enc_mon(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nsm_args *argp) { - struct xdr_stream xdr; - int status; - - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - status = encode_mon_id(&xdr, argp); - if (unlikely(status)) - return status; - return encode_priv(&xdr, argp); + encode_mon_id(xdr, argp); + encode_priv(xdr, argp); } -static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p, - const struct nsm_args *argp) +static void nsm_xdr_enc_unmon(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nsm_args *argp) { - struct xdr_stream xdr; - - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - return encode_mon_id(&xdr, argp); + encode_mon_id(xdr, argp); } -static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p, - struct nsm_res *resp) +static int nsm_xdr_dec_stat_res(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nsm_res *resp) { - struct xdr_stream xdr; + __be32 *p; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - p = xdr_inline_decode(&xdr, 2 * sizeof(u32)); + p = xdr_inline_decode(xdr, 4 + 4); if (unlikely(p == NULL)) return -EIO; - resp->status = ntohl(*p++); - resp->state = ntohl(*p); + resp->status = be32_to_cpup(p++); + resp->state = be32_to_cpup(p); - dprintk("lockd: xdr_dec_stat_res status %d state %d\n", - resp->status, resp->state); + dprintk("lockd: %s status %d state %d\n", + __func__, resp->status, resp->state); return 0; } -static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, - struct nsm_res *resp) +static int nsm_xdr_dec_stat(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nsm_res *resp) { - struct xdr_stream xdr; + __be32 *p; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - p = xdr_inline_decode(&xdr, sizeof(u32)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - resp->state = ntohl(*p); + resp->state = be32_to_cpup(p); - dprintk("lockd: xdr_dec_stat state %d\n", resp->state); + dprintk("lockd: %s state %d\n", __func__, resp->state); return 0; } @@ -542,8 +516,8 @@ static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p, static struct rpc_procinfo nsm_procedures[] = { [NSMPROC_MON] = { .p_proc = NSMPROC_MON, - .p_encode = (kxdrproc_t)xdr_enc_mon, - .p_decode = (kxdrproc_t)xdr_dec_stat_res, + .p_encode = (kxdreproc_t)nsm_xdr_enc_mon, + .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat_res, .p_arglen = SM_mon_sz, .p_replen = SM_monres_sz, .p_statidx = NSMPROC_MON, @@ -551,8 +525,8 @@ static struct rpc_procinfo nsm_procedures[] = { }, [NSMPROC_UNMON] = { .p_proc = NSMPROC_UNMON, - .p_encode = (kxdrproc_t)xdr_enc_unmon, - .p_decode = (kxdrproc_t)xdr_dec_stat, + .p_encode = (kxdreproc_t)nsm_xdr_enc_unmon, + .p_decode = (kxdrdproc_t)nsm_xdr_dec_stat, .p_arglen = SM_mon_id_sz, .p_replen = SM_unmonres_sz, .p_statidx = NSMPROC_UNMON, diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c index a336e83..9a41fdc 100644 --- a/fs/lockd/svc4proc.c +++ b/fs/lockd/svc4proc.c @@ -9,7 +9,6 @@ #include <linux/types.h> #include <linux/time.h> -#include <linux/smp_lock.h> #include <linux/lockd/lockd.h> #include <linux/lockd/share.h> @@ -52,7 +51,7 @@ nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, return 0; no_locks: - nlm_release_host(host); + nlmsvc_release_host(host); if (error) return error; return nlm_lck_denied_nolocks; @@ -93,7 +92,7 @@ nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp, else dprintk("lockd: TEST4 status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rc; } @@ -135,7 +134,7 @@ nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp, else dprintk("lockd: LOCK status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rc; } @@ -165,7 +164,7 @@ nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = nlmsvc_cancel_blocked(file, &argp->lock); dprintk("lockd: CANCEL status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -198,7 +197,7 @@ nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = nlmsvc_unlock(file, &argp->lock); dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -230,7 +229,7 @@ static void nlm4svc_callback_exit(struct rpc_task *task, void *data) static void nlm4svc_callback_release(void *data) { - nlm_release_call(data); + nlmsvc_release_call(data); } static const struct rpc_call_ops nlm4svc_callback_ops = { @@ -262,7 +261,7 @@ static __be32 nlm4svc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args stat = func(rqstp, argp, &call->a_res); if (stat != 0) { - nlm_release_call(call); + nlmsvc_release_call(call); return stat; } @@ -335,7 +334,7 @@ nlm4svc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = nlmsvc_share_file(host, file, argp); dprintk("lockd: SHARE status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -368,7 +367,7 @@ nlm4svc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = nlmsvc_unshare_file(host, file, argp); dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -400,7 +399,7 @@ nlm4svc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp, return rpc_success; nlmsvc_free_host_resources(host); - nlm_release_host(host); + nlmsvc_release_host(host); return rpc_success; } diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c index c462d34..6e31695 100644 --- a/fs/lockd/svclock.c +++ b/fs/lockd/svclock.c @@ -25,7 +25,6 @@ #include <linux/errno.h> #include <linux/kernel.h> #include <linux/sched.h> -#include <linux/smp_lock.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/svc.h> #include <linux/lockd/nlm.h> @@ -47,6 +46,7 @@ static void nlmsvc_remove_block(struct nlm_block *block); static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock); static void nlmsvc_freegrantargs(struct nlm_rqst *call); static const struct rpc_call_ops nlmsvc_grant_ops; +static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie); /* * The list of blocked locks to retry @@ -234,7 +234,7 @@ nlmsvc_create_block(struct svc_rqst *rqstp, struct nlm_host *host, failed_free: kfree(block); failed: - nlm_release_call(call); + nlmsvc_release_call(call); return NULL; } @@ -267,7 +267,7 @@ static void nlmsvc_free_block(struct kref *kref) mutex_unlock(&file->f_mutex); nlmsvc_freegrantargs(block->b_call); - nlm_release_call(block->b_call); + nlmsvc_release_call(block->b_call); nlm_release_file(block->b_file); kfree(block->b_fl); kfree(block); @@ -935,3 +935,32 @@ nlmsvc_retry_blocked(void) return timeout; } + +#ifdef RPC_DEBUG +static const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie) +{ + /* + * We can get away with a static buffer because we're only + * called with BKL held. + */ + static char buf[2*NLM_MAXCOOKIELEN+1]; + unsigned int i, len = sizeof(buf); + char *p = buf; + + len--; /* allow for trailing \0 */ + if (len < 3) + return "???"; + for (i = 0 ; i < cookie->len ; i++) { + if (len < 2) { + strcpy(p-3, "..."); + break; + } + sprintf(p, "%02x", cookie->data[i]); + p += 2; + len -= 2; + } + *p = '\0'; + + return buf; +} +#endif diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c index c3069f3..d27aab1 100644 --- a/fs/lockd/svcproc.c +++ b/fs/lockd/svcproc.c @@ -9,7 +9,6 @@ #include <linux/types.h> #include <linux/time.h> -#include <linux/smp_lock.h> #include <linux/lockd/lockd.h> #include <linux/lockd/share.h> @@ -81,7 +80,7 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, return 0; no_locks: - nlm_release_host(host); + nlmsvc_release_host(host); if (error) return error; return nlm_lck_denied_nolocks; @@ -123,7 +122,7 @@ nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp, dprintk("lockd: TEST status %d vers %d\n", ntohl(resp->status), rqstp->rq_vers); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rc; } @@ -165,7 +164,7 @@ nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp, else dprintk("lockd: LOCK status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rc; } @@ -195,7 +194,7 @@ nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = cast_status(nlmsvc_cancel_blocked(file, &argp->lock)); dprintk("lockd: CANCEL status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -228,7 +227,7 @@ nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = cast_status(nlmsvc_unlock(file, &argp->lock)); dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -258,9 +257,17 @@ static void nlmsvc_callback_exit(struct rpc_task *task, void *data) -task->tk_status); } +void nlmsvc_release_call(struct nlm_rqst *call) +{ + if (!atomic_dec_and_test(&call->a_count)) + return; + nlmsvc_release_host(call->a_host); + kfree(call); +} + static void nlmsvc_callback_release(void *data) { - nlm_release_call(data); + nlmsvc_release_call(data); } static const struct rpc_call_ops nlmsvc_callback_ops = { @@ -292,7 +299,7 @@ static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args stat = func(rqstp, argp, &call->a_res); if (stat != 0) { - nlm_release_call(call); + nlmsvc_release_call(call); return stat; } @@ -367,7 +374,7 @@ nlmsvc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = cast_status(nlmsvc_share_file(host, file, argp)); dprintk("lockd: SHARE status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -400,7 +407,7 @@ nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp, resp->status = cast_status(nlmsvc_unshare_file(host, file, argp)); dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status)); - nlm_release_host(host); + nlmsvc_release_host(host); nlm_release_file(file); return rpc_success; } @@ -432,7 +439,7 @@ nlmsvc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp, return rpc_success; nlmsvc_free_host_resources(host); - nlm_release_host(host); + nlmsvc_release_host(host); return rpc_success; } diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c index b583ab0..964666c 100644 --- a/fs/lockd/xdr.c +++ b/fs/lockd/xdr.c @@ -149,37 +149,6 @@ nlm_decode_lock(__be32 *p, struct nlm_lock *lock) } /* - * Encode a lock as part of an NLM call - */ -static __be32 * -nlm_encode_lock(__be32 *p, struct nlm_lock *lock) -{ - struct file_lock *fl = &lock->fl; - __s32 start, len; - - if (!(p = xdr_encode_string(p, lock->caller)) - || !(p = nlm_encode_fh(p, &lock->fh)) - || !(p = nlm_encode_oh(p, &lock->oh))) - return NULL; - - if (fl->fl_start > NLM_OFFSET_MAX - || (fl->fl_end > NLM_OFFSET_MAX && fl->fl_end != OFFSET_MAX)) - return NULL; - - start = loff_t_to_s32(fl->fl_start); - if (fl->fl_end == OFFSET_MAX) - len = 0; - else - len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1); - - *p++ = htonl(lock->svid); - *p++ = htonl(start); - *p++ = htonl(len); - - return p; -} - -/* * Encode result of a TEST/TEST_MSG call */ static __be32 * @@ -372,259 +341,3 @@ nlmsvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) { return xdr_ressize_check(rqstp, p); } - -/* - * Now, the client side XDR functions - */ -#ifdef NLMCLNT_SUPPORT_SHARES -static int -nlmclt_decode_void(struct rpc_rqst *req, u32 *p, void *ptr) -{ - return 0; -} -#endif - -static int -nlmclt_encode_testargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm_encode_cookie(p, &argp->cookie))) - return -EIO; - *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; - if (!(p = nlm_encode_lock(p, lock))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlmclt_decode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm_decode_cookie(p, &resp->cookie))) - return -EIO; - resp->status = *p++; - if (resp->status == nlm_lck_denied) { - struct file_lock *fl = &resp->lock.fl; - u32 excl; - s32 start, len, end; - - memset(&resp->lock, 0, sizeof(resp->lock)); - locks_init_lock(fl); - excl = ntohl(*p++); - resp->lock.svid = ntohl(*p++); - fl->fl_pid = (pid_t)resp->lock.svid; - if (!(p = nlm_decode_oh(p, &resp->lock.oh))) - return -EIO; - - fl->fl_flags = FL_POSIX; - fl->fl_type = excl? F_WRLCK : F_RDLCK; - start = ntohl(*p++); - len = ntohl(*p++); - end = start + len - 1; - - fl->fl_start = s32_to_loff_t(start); - if (len == 0 || end < 0) - fl->fl_end = OFFSET_MAX; - else - fl->fl_end = s32_to_loff_t(end); - } - return 0; -} - - -static int -nlmclt_encode_lockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm_encode_cookie(p, &argp->cookie))) - return -EIO; - *p++ = argp->block? xdr_one : xdr_zero; - *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; - if (!(p = nlm_encode_lock(p, lock))) - return -EIO; - *p++ = argp->reclaim? xdr_one : xdr_zero; - *p++ = htonl(argp->state); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlmclt_encode_cancargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm_encode_cookie(p, &argp->cookie))) - return -EIO; - *p++ = argp->block? xdr_one : xdr_zero; - *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; - if (!(p = nlm_encode_lock(p, lock))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlmclt_encode_unlockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm_encode_cookie(p, &argp->cookie))) - return -EIO; - if (!(p = nlm_encode_lock(p, lock))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlmclt_encode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm_encode_cookie(p, &resp->cookie))) - return -EIO; - *p++ = resp->status; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlmclt_encode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm_encode_testres(p, resp))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlmclt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm_decode_cookie(p, &resp->cookie))) - return -EIO; - resp->status = *p++; - return 0; -} - -#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) -# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" -#endif - -/* - * Buffer requirements for NLM - */ -#define NLM_void_sz 0 -#define NLM_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN) -#define NLM_caller_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE) -#define NLM_owner_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE) -#define NLM_fhandle_sz 1+XDR_QUADLEN(NFS2_FHSIZE) -#define NLM_lock_sz 3+NLM_caller_sz+NLM_owner_sz+NLM_fhandle_sz -#define NLM_holder_sz 4+NLM_owner_sz - -#define NLM_testargs_sz NLM_cookie_sz+1+NLM_lock_sz -#define NLM_lockargs_sz NLM_cookie_sz+4+NLM_lock_sz -#define NLM_cancargs_sz NLM_cookie_sz+2+NLM_lock_sz -#define NLM_unlockargs_sz NLM_cookie_sz+NLM_lock_sz - -#define NLM_testres_sz NLM_cookie_sz+1+NLM_holder_sz -#define NLM_res_sz NLM_cookie_sz+1 -#define NLM_norep_sz 0 - -/* - * For NLM, a void procedure really returns nothing - */ -#define nlmclt_decode_norep NULL - -#define PROC(proc, argtype, restype) \ -[NLMPROC_##proc] = { \ - .p_proc = NLMPROC_##proc, \ - .p_encode = (kxdrproc_t) nlmclt_encode_##argtype, \ - .p_decode = (kxdrproc_t) nlmclt_decode_##restype, \ - .p_arglen = NLM_##argtype##_sz, \ - .p_replen = NLM_##restype##_sz, \ - .p_statidx = NLMPROC_##proc, \ - .p_name = #proc, \ - } - -static struct rpc_procinfo nlm_procedures[] = { - PROC(TEST, testargs, testres), - PROC(LOCK, lockargs, res), - PROC(CANCEL, cancargs, res), - PROC(UNLOCK, unlockargs, res), - PROC(GRANTED, testargs, res), - PROC(TEST_MSG, testargs, norep), - PROC(LOCK_MSG, lockargs, norep), - PROC(CANCEL_MSG, cancargs, norep), - PROC(UNLOCK_MSG, unlockargs, norep), - PROC(GRANTED_MSG, testargs, norep), - PROC(TEST_RES, testres, norep), - PROC(LOCK_RES, res, norep), - PROC(CANCEL_RES, res, norep), - PROC(UNLOCK_RES, res, norep), - PROC(GRANTED_RES, res, norep), -#ifdef NLMCLNT_SUPPORT_SHARES - PROC(SHARE, shareargs, shareres), - PROC(UNSHARE, shareargs, shareres), - PROC(NM_LOCK, lockargs, res), - PROC(FREE_ALL, notify, void), -#endif -}; - -static struct rpc_version nlm_version1 = { - .number = 1, - .nrprocs = 16, - .procs = nlm_procedures, -}; - -static struct rpc_version nlm_version3 = { - .number = 3, - .nrprocs = 24, - .procs = nlm_procedures, -}; - -static struct rpc_version * nlm_versions[] = { - [1] = &nlm_version1, - [3] = &nlm_version3, -#ifdef CONFIG_LOCKD_V4 - [4] = &nlm_version4, -#endif -}; - -static struct rpc_stat nlm_stats; - -struct rpc_program nlm_program = { - .name = "lockd", - .number = NLM_PROGRAM, - .nrvers = ARRAY_SIZE(nlm_versions), - .version = nlm_versions, - .stats = &nlm_stats, -}; - -#ifdef RPC_DEBUG -const char *nlmdbg_cookie2a(const struct nlm_cookie *cookie) -{ - /* - * We can get away with a static buffer because we're only - * called with BKL held. - */ - static char buf[2*NLM_MAXCOOKIELEN+1]; - unsigned int i, len = sizeof(buf); - char *p = buf; - - len--; /* allow for trailing \0 */ - if (len < 3) - return "???"; - for (i = 0 ; i < cookie->len ; i++) { - if (len < 2) { - strcpy(p-3, "..."); - break; - } - sprintf(p, "%02x", cookie->data[i]); - p += 2; - len -= 2; - } - *p = '\0'; - - return buf; -} -#endif diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c index ad9dbbc..dfa4789 100644 --- a/fs/lockd/xdr4.c +++ b/fs/lockd/xdr4.c @@ -93,15 +93,6 @@ nlm4_decode_fh(__be32 *p, struct nfs_fh *f) return p + XDR_QUADLEN(f->size); } -static __be32 * -nlm4_encode_fh(__be32 *p, struct nfs_fh *f) -{ - *p++ = htonl(f->size); - if (f->size) p[XDR_QUADLEN(f->size)-1] = 0; /* don't leak anything */ - memcpy(p, f->data, f->size); - return p + XDR_QUADLEN(f->size); -} - /* * Encode and decode owner handle */ @@ -112,12 +103,6 @@ nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh) } static __be32 * -nlm4_encode_oh(__be32 *p, struct xdr_netobj *oh) -{ - return xdr_encode_netobj(p, oh); -} - -static __be32 * nlm4_decode_lock(__be32 *p, struct nlm_lock *lock) { struct file_lock *fl = &lock->fl; @@ -150,38 +135,6 @@ nlm4_decode_lock(__be32 *p, struct nlm_lock *lock) } /* - * Encode a lock as part of an NLM call - */ -static __be32 * -nlm4_encode_lock(__be32 *p, struct nlm_lock *lock) -{ - struct file_lock *fl = &lock->fl; - __s64 start, len; - - if (!(p = xdr_encode_string(p, lock->caller)) - || !(p = nlm4_encode_fh(p, &lock->fh)) - || !(p = nlm4_encode_oh(p, &lock->oh))) - return NULL; - - if (fl->fl_start > NLM4_OFFSET_MAX - || (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX)) - return NULL; - - *p++ = htonl(lock->svid); - - start = loff_t_to_s64(fl->fl_start); - if (fl->fl_end == OFFSET_MAX) - len = 0; - else - len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1); - - p = xdr_encode_hyper(p, start); - p = xdr_encode_hyper(p, len); - - return p; -} - -/* * Encode result of a TEST/TEST_MSG call */ static __be32 * @@ -379,211 +332,3 @@ nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) { return xdr_ressize_check(rqstp, p); } - -/* - * Now, the client side XDR functions - */ -#ifdef NLMCLNT_SUPPORT_SHARES -static int -nlm4clt_decode_void(struct rpc_rqst *req, __be32 *p, void *ptr) -{ - return 0; -} -#endif - -static int -nlm4clt_encode_testargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm4_encode_cookie(p, &argp->cookie))) - return -EIO; - *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; - if (!(p = nlm4_encode_lock(p, lock))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlm4clt_decode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm4_decode_cookie(p, &resp->cookie))) - return -EIO; - resp->status = *p++; - if (resp->status == nlm_lck_denied) { - struct file_lock *fl = &resp->lock.fl; - u32 excl; - __u64 start, len; - __s64 end; - - memset(&resp->lock, 0, sizeof(resp->lock)); - locks_init_lock(fl); - excl = ntohl(*p++); - resp->lock.svid = ntohl(*p++); - fl->fl_pid = (pid_t)resp->lock.svid; - if (!(p = nlm4_decode_oh(p, &resp->lock.oh))) - return -EIO; - - fl->fl_flags = FL_POSIX; - fl->fl_type = excl? F_WRLCK : F_RDLCK; - p = xdr_decode_hyper(p, &start); - p = xdr_decode_hyper(p, &len); - end = start + len - 1; - - fl->fl_start = s64_to_loff_t(start); - if (len == 0 || end < 0) - fl->fl_end = OFFSET_MAX; - else - fl->fl_end = s64_to_loff_t(end); - } - return 0; -} - - -static int -nlm4clt_encode_lockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm4_encode_cookie(p, &argp->cookie))) - return -EIO; - *p++ = argp->block? xdr_one : xdr_zero; - *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; - if (!(p = nlm4_encode_lock(p, lock))) - return -EIO; - *p++ = argp->reclaim? xdr_one : xdr_zero; - *p++ = htonl(argp->state); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlm4clt_encode_cancargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm4_encode_cookie(p, &argp->cookie))) - return -EIO; - *p++ = argp->block? xdr_one : xdr_zero; - *p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero; - if (!(p = nlm4_encode_lock(p, lock))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlm4clt_encode_unlockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp) -{ - struct nlm_lock *lock = &argp->lock; - - if (!(p = nlm4_encode_cookie(p, &argp->cookie))) - return -EIO; - if (!(p = nlm4_encode_lock(p, lock))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlm4clt_encode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm4_encode_cookie(p, &resp->cookie))) - return -EIO; - *p++ = resp->status; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlm4clt_encode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm4_encode_testres(p, resp))) - return -EIO; - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; -} - -static int -nlm4clt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp) -{ - if (!(p = nlm4_decode_cookie(p, &resp->cookie))) - return -EIO; - resp->status = *p++; - return 0; -} - -#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ) -# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!" -#endif - -#if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN) -# error "NLM host name cannot be larger than NLM's maximum string length!" -#endif - -/* - * Buffer requirements for NLM - */ -#define NLM4_void_sz 0 -#define NLM4_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN) -#define NLM4_caller_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE) -#define NLM4_owner_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE) -#define NLM4_fhandle_sz 1+XDR_QUADLEN(NFS3_FHSIZE) -#define NLM4_lock_sz 5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz -#define NLM4_holder_sz 6+NLM4_owner_sz - -#define NLM4_testargs_sz NLM4_cookie_sz+1+NLM4_lock_sz -#define NLM4_lockargs_sz NLM4_cookie_sz+4+NLM4_lock_sz -#define NLM4_cancargs_sz NLM4_cookie_sz+2+NLM4_lock_sz -#define NLM4_unlockargs_sz NLM4_cookie_sz+NLM4_lock_sz - -#define NLM4_testres_sz NLM4_cookie_sz+1+NLM4_holder_sz -#define NLM4_res_sz NLM4_cookie_sz+1 -#define NLM4_norep_sz 0 - -/* - * For NLM, a void procedure really returns nothing - */ -#define nlm4clt_decode_norep NULL - -#define PROC(proc, argtype, restype) \ -[NLMPROC_##proc] = { \ - .p_proc = NLMPROC_##proc, \ - .p_encode = (kxdrproc_t) nlm4clt_encode_##argtype, \ - .p_decode = (kxdrproc_t) nlm4clt_decode_##restype, \ - .p_arglen = NLM4_##argtype##_sz, \ - .p_replen = NLM4_##restype##_sz, \ - .p_statidx = NLMPROC_##proc, \ - .p_name = #proc, \ - } - -static struct rpc_procinfo nlm4_procedures[] = { - PROC(TEST, testargs, testres), - PROC(LOCK, lockargs, res), - PROC(CANCEL, cancargs, res), - PROC(UNLOCK, unlockargs, res), - PROC(GRANTED, testargs, res), - PROC(TEST_MSG, testargs, norep), - PROC(LOCK_MSG, lockargs, norep), - PROC(CANCEL_MSG, cancargs, norep), - PROC(UNLOCK_MSG, unlockargs, norep), - PROC(GRANTED_MSG, testargs, norep), - PROC(TEST_RES, testres, norep), - PROC(LOCK_RES, res, norep), - PROC(CANCEL_RES, res, norep), - PROC(UNLOCK_RES, res, norep), - PROC(GRANTED_RES, res, norep), -#ifdef NLMCLNT_SUPPORT_SHARES - PROC(SHARE, shareargs, shareres), - PROC(UNSHARE, shareargs, shareres), - PROC(NM_LOCK, lockargs, res), - PROC(FREE_ALL, notify, void), -#endif -}; - -struct rpc_version nlm_version4 = { - .number = 4, - .nrprocs = 24, - .procs = nlm4_procedures, -}; @@ -122,7 +122,6 @@ #include <linux/module.h> #include <linux/security.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/syscalls.h> #include <linux/time.h> #include <linux/rcupdate.h> @@ -186,7 +185,7 @@ void locks_release_private(struct file_lock *fl) EXPORT_SYMBOL_GPL(locks_release_private); /* Free a lock which is not in use. */ -static void locks_free_lock(struct file_lock *fl) +void locks_free_lock(struct file_lock *fl) { BUG_ON(waitqueue_active(&fl->fl_wait)); BUG_ON(!list_empty(&fl->fl_block)); @@ -195,6 +194,7 @@ static void locks_free_lock(struct file_lock *fl) locks_release_private(fl); kmem_cache_free(filelock_cache, fl); } +EXPORT_SYMBOL(locks_free_lock); void locks_init_lock(struct file_lock *fl) { @@ -234,11 +234,8 @@ static void locks_copy_private(struct file_lock *new, struct file_lock *fl) fl->fl_ops->fl_copy_lock(new, fl); new->fl_ops = fl->fl_ops; } - if (fl->fl_lmops) { - if (fl->fl_lmops->fl_copy_lock) - fl->fl_lmops->fl_copy_lock(new, fl); + if (fl->fl_lmops) new->fl_lmops = fl->fl_lmops; - } } /* @@ -1371,26 +1368,28 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) struct inode *inode = dentry->d_inode; int error, rdlease_count = 0, wrlease_count = 0; + lease = *flp; + + error = -EACCES; if ((current_fsuid() != inode->i_uid) && !capable(CAP_LEASE)) - return -EACCES; + goto out; + error = -EINVAL; if (!S_ISREG(inode->i_mode)) - return -EINVAL; + goto out; error = security_file_lock(filp, arg); if (error) - return error; + goto out; time_out_leases(inode); BUG_ON(!(*flp)->fl_lmops->fl_break); - lease = *flp; - if (arg != F_UNLCK) { error = -EAGAIN; if ((arg == F_RDLCK) && (atomic_read(&inode->i_writecount) > 0)) goto out; if ((arg == F_WRLCK) - && ((atomic_read(&dentry->d_count) > 1) + && ((dentry->d_count > 1) || (atomic_read(&inode->i_count) > 1))) goto out; } @@ -1425,8 +1424,9 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) goto out; if (my_before != NULL) { - *flp = *my_before; error = lease->fl_lmops->fl_change(my_before, arg); + if (!error) + *flp = *my_before; goto out; } @@ -1441,7 +1441,6 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp) return 0; out: - locks_free_lock(lease); return error; } EXPORT_SYMBOL(generic_setlease); @@ -1493,21 +1492,19 @@ int vfs_setlease(struct file *filp, long arg, struct file_lock **lease) } EXPORT_SYMBOL_GPL(vfs_setlease); -/** - * fcntl_setlease - sets a lease on an open file - * @fd: open file descriptor - * @filp: file pointer - * @arg: type of lease to obtain - * - * Call this fcntl to establish a lease on the file. - * Note that you also need to call %F_SETSIG to - * receive a signal when the lease is broken. - */ -int fcntl_setlease(unsigned int fd, struct file *filp, long arg) +static int do_fcntl_delete_lease(struct file *filp) { - struct file_lock *fl; + struct file_lock fl, *flp = &fl; + + lease_init(filp, F_UNLCK, flp); + + return vfs_setlease(filp, F_UNLCK, &flp); +} + +static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg) +{ + struct file_lock *fl, *ret; struct fasync_struct *new; - struct inode *inode = filp->f_path.dentry->d_inode; int error; fl = lease_alloc(filp, arg); @@ -1519,10 +1516,16 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg) locks_free_lock(fl); return -ENOMEM; } + ret = fl; lock_flocks(); - error = __vfs_setlease(filp, arg, &fl); - if (error || arg == F_UNLCK) - goto out_unlock; + error = __vfs_setlease(filp, arg, &ret); + if (error) { + unlock_flocks(); + locks_free_lock(fl); + goto out_free_fasync; + } + if (ret != fl) + locks_free_lock(fl); /* * fasync_insert_entry() returns the old entry if any. @@ -1530,26 +1533,36 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg) * inserted it into the fasync list. Clear new so that * we don't release it here. */ - if (!fasync_insert_entry(fd, filp, &fl->fl_fasync, new)) + if (!fasync_insert_entry(fd, filp, &ret->fl_fasync, new)) new = NULL; - if (error < 0) { - /* remove lease just inserted by setlease */ - fl->fl_type = F_UNLCK | F_INPROGRESS; - fl->fl_break_time = jiffies - 10; - time_out_leases(inode); - goto out_unlock; - } - error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0); -out_unlock: unlock_flocks(); + +out_free_fasync: if (new) fasync_free(new); return error; } /** + * fcntl_setlease - sets a lease on an open file + * @fd: open file descriptor + * @filp: file pointer + * @arg: type of lease to obtain + * + * Call this fcntl to establish a lease on the file. + * Note that you also need to call %F_SETSIG to + * receive a signal when the lease is broken. + */ +int fcntl_setlease(unsigned int fd, struct file *filp, long arg) +{ + if (arg == F_UNLCK) + return do_fcntl_delete_lease(filp); + return do_fcntl_add_lease(fd, filp, arg); +} + +/** * flock_lock_file_wait - Apply a FLOCK-style lock to a file * @filp: The file to apply the lock to * @fl: The lock to be applied diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c index 9bd2ce2..92ca6fb 100644 --- a/fs/logfs/dev_bdev.c +++ b/fs/logfs/dev_bdev.c @@ -298,9 +298,9 @@ static int bdev_write_sb(struct super_block *sb, struct page *page) return sync_request(page, bdev, WRITE); } -static void bdev_put_device(struct super_block *sb) +static void bdev_put_device(struct logfs_super *s) { - close_bdev_exclusive(logfs_super(sb)->s_bdev, FMODE_READ|FMODE_WRITE); + close_bdev_exclusive(s->s_bdev, FMODE_READ|FMODE_WRITE); } static int bdev_can_write_buf(struct super_block *sb, u64 ofs) @@ -320,8 +320,8 @@ static const struct logfs_device_ops bd_devops = { .put_device = bdev_put_device, }; -int logfs_get_sb_bdev(struct file_system_type *type, int flags, - const char *devname, struct vfsmount *mnt) +int logfs_get_sb_bdev(struct logfs_super *p, struct file_system_type *type, + const char *devname) { struct block_device *bdev; @@ -332,8 +332,11 @@ int logfs_get_sb_bdev(struct file_system_type *type, int flags, if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) { int mtdnr = MINOR(bdev->bd_dev); close_bdev_exclusive(bdev, FMODE_READ|FMODE_WRITE); - return logfs_get_sb_mtd(type, flags, mtdnr, mnt); + return logfs_get_sb_mtd(p, mtdnr); } - return logfs_get_sb_device(type, flags, NULL, bdev, &bd_devops, mnt); + p->s_bdev = bdev; + p->s_mtd = NULL; + p->s_devops = &bd_devops; + return 0; } diff --git a/fs/logfs/dev_mtd.c b/fs/logfs/dev_mtd.c index a85d47d..7466e9d 100644 --- a/fs/logfs/dev_mtd.c +++ b/fs/logfs/dev_mtd.c @@ -230,9 +230,9 @@ static void mtd_writeseg(struct super_block *sb, u64 ofs, size_t len) __mtd_writeseg(sb, ofs, ofs >> PAGE_SHIFT, len >> PAGE_SHIFT); } -static void mtd_put_device(struct super_block *sb) +static void mtd_put_device(struct logfs_super *s) { - put_mtd_device(logfs_super(sb)->s_mtd); + put_mtd_device(s->s_mtd); } static int mtd_can_write_buf(struct super_block *sb, u64 ofs) @@ -265,14 +265,14 @@ static const struct logfs_device_ops mtd_devops = { .put_device = mtd_put_device, }; -int logfs_get_sb_mtd(struct file_system_type *type, int flags, - int mtdnr, struct vfsmount *mnt) +int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr) { - struct mtd_info *mtd; - const struct logfs_device_ops *devops = &mtd_devops; - - mtd = get_mtd_device(NULL, mtdnr); + struct mtd_info *mtd = get_mtd_device(NULL, mtdnr); if (IS_ERR(mtd)) return PTR_ERR(mtd); - return logfs_get_sb_device(type, flags, mtd, NULL, devops, mnt); + + s->s_bdev = NULL; + s->s_mtd = mtd; + s->s_devops = &mtd_devops; + return 0; } diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c index 409dfd6..f9ddf0c 100644 --- a/fs/logfs/dir.c +++ b/fs/logfs/dir.c @@ -555,9 +555,11 @@ static int logfs_symlink(struct inode *dir, struct dentry *dentry, return __logfs_create(dir, dentry, inode, target, destlen); } -static int logfs_permission(struct inode *inode, int mask) +static int logfs_permission(struct inode *inode, int mask, unsigned int flags) { - return generic_permission(inode, mask, NULL); + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + return generic_permission(inode, mask, flags, NULL); } static int logfs_link(struct dentry *old_dentry, struct inode *dir, diff --git a/fs/logfs/inode.c b/fs/logfs/inode.c index d8c71ec..03b8c24 100644 --- a/fs/logfs/inode.c +++ b/fs/logfs/inode.c @@ -141,13 +141,20 @@ struct inode *logfs_safe_iget(struct super_block *sb, ino_t ino, int *is_cached) return __logfs_iget(sb, ino); } +static void logfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(logfs_inode_cache, logfs_inode(inode)); +} + static void __logfs_destroy_inode(struct inode *inode) { struct logfs_inode *li = logfs_inode(inode); BUG_ON(li->li_block); list_del(&li->li_freeing_list); - kmem_cache_free(logfs_inode_cache, li); + call_rcu(&inode->i_rcu, logfs_i_callback); } static void logfs_destroy_inode(struct inode *inode) diff --git a/fs/logfs/journal.c b/fs/logfs/journal.c index f46ee8b..9da2970 100644 --- a/fs/logfs/journal.c +++ b/fs/logfs/journal.c @@ -828,7 +828,7 @@ void do_logfs_journal_wl_pass(struct super_block *sb) super->s_journal_seg[i] = segno; super->s_journal_ec[i] = ec; logfs_set_segment_reserved(sb, segno); - err = btree_insert32(head, segno, (void *)1, GFP_KERNEL); + err = btree_insert32(head, segno, (void *)1, GFP_NOFS); BUG_ON(err); /* mempool should prevent this */ err = logfs_erase_segment(sb, segno, 1); BUG_ON(err); /* FIXME: remount-ro would be nicer */ diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h index b878626..57afd4a 100644 --- a/fs/logfs/logfs.h +++ b/fs/logfs/logfs.h @@ -136,6 +136,7 @@ struct logfs_area_ops { int (*erase_segment)(struct logfs_area *area); }; +struct logfs_super; /* forward */ /** * struct logfs_device_ops - device access operations * @@ -156,7 +157,7 @@ struct logfs_device_ops { int ensure_write); int (*can_write_buf)(struct super_block *sb, u64 ofs); void (*sync)(struct super_block *sb); - void (*put_device)(struct super_block *sb); + void (*put_device)(struct logfs_super *s); }; /** @@ -471,11 +472,13 @@ void logfs_compr_exit(void); /* dev_bdev.c */ #ifdef CONFIG_BLOCK -int logfs_get_sb_bdev(struct file_system_type *type, int flags, - const char *devname, struct vfsmount *mnt); +int logfs_get_sb_bdev(struct logfs_super *s, + struct file_system_type *type, + const char *devname); #else -static inline int logfs_get_sb_bdev(struct file_system_type *type, int flags, - const char *devname, struct vfsmount *mnt) +static inline int logfs_get_sb_bdev(struct logfs_super *s, + struct file_system_type *type, + const char *devname) { return -ENODEV; } @@ -483,11 +486,9 @@ static inline int logfs_get_sb_bdev(struct file_system_type *type, int flags, /* dev_mtd.c */ #ifdef CONFIG_MTD -int logfs_get_sb_mtd(struct file_system_type *type, int flags, - int mtdnr, struct vfsmount *mnt); +int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr); #else -static inline int logfs_get_sb_mtd(struct file_system_type *type, int flags, - int mtdnr, struct vfsmount *mnt) +static inline int logfs_get_sb_mtd(struct logfs_super *s, int mtdnr) { return -ENODEV; } @@ -619,9 +620,6 @@ void emergency_read_end(struct page *page); void logfs_crash_dump(struct super_block *sb); void *memchr_inv(const void *s, int c, size_t n); int logfs_statfs(struct dentry *dentry, struct kstatfs *stats); -int logfs_get_sb_device(struct file_system_type *type, int flags, - struct mtd_info *mtd, struct block_device *bdev, - const struct logfs_device_ops *devops, struct vfsmount *mnt); int logfs_check_ds(struct logfs_disk_super *ds); int logfs_write_sb(struct super_block *sb); diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c index 6127baf..ee99a9f 100644 --- a/fs/logfs/readwrite.c +++ b/fs/logfs/readwrite.c @@ -1994,6 +1994,9 @@ static int do_write_inode(struct inode *inode) /* FIXME: transaction is part of logfs_block now. Is that enough? */ err = logfs_write_buf(master_inode, page, 0); + if (err) + move_page_to_inode(inode, page); + logfs_put_write_page(page); return err; } diff --git a/fs/logfs/super.c b/fs/logfs/super.c index 5336155..33435e4 100644 --- a/fs/logfs/super.c +++ b/fs/logfs/super.c @@ -325,7 +325,7 @@ static int logfs_make_writeable(struct super_block *sb) return 0; } -static int logfs_get_sb_final(struct super_block *sb, struct vfsmount *mnt) +static int logfs_get_sb_final(struct super_block *sb) { struct logfs_super *super = logfs_super(sb); struct inode *rootdir; @@ -356,7 +356,6 @@ static int logfs_get_sb_final(struct super_block *sb, struct vfsmount *mnt) } log_super("LogFS: Finished mounting\n"); - simple_set_mnt(mnt, sb); return 0; fail: @@ -529,43 +528,37 @@ static void logfs_kill_sb(struct super_block *sb) logfs_cleanup_rw(sb); if (super->s_erase_page) __free_page(super->s_erase_page); - super->s_devops->put_device(sb); + super->s_devops->put_device(super); logfs_mempool_destroy(super->s_btree_pool); logfs_mempool_destroy(super->s_alias_pool); kfree(super); log_super("LogFS: Finished unmounting\n"); } -int logfs_get_sb_device(struct file_system_type *type, int flags, - struct mtd_info *mtd, struct block_device *bdev, - const struct logfs_device_ops *devops, struct vfsmount *mnt) +static struct dentry *logfs_get_sb_device(struct logfs_super *super, + struct file_system_type *type, int flags) { - struct logfs_super *super; struct super_block *sb; int err = -ENOMEM; static int mount_count; log_super("LogFS: Start mount %x\n", mount_count++); - super = kzalloc(sizeof(*super), GFP_KERNEL); - if (!super) - goto err0; - super->s_mtd = mtd; - super->s_bdev = bdev; err = -EINVAL; sb = sget(type, logfs_sb_test, logfs_sb_set, super); - if (IS_ERR(sb)) - goto err0; + if (IS_ERR(sb)) { + super->s_devops->put_device(super); + kfree(super); + return ERR_CAST(sb); + } if (sb->s_root) { /* Device is already in use */ - err = 0; - simple_set_mnt(mnt, sb); - goto err0; + super->s_devops->put_device(super); + kfree(super); + return dget(sb->s_root); } - super->s_devops = devops; - /* * sb->s_maxbytes is limited to 8TB. On 32bit systems, the page cache * only covers 16TB and the upper 8TB are used for indirect blocks. @@ -581,10 +574,12 @@ int logfs_get_sb_device(struct file_system_type *type, int flags, goto err1; sb->s_flags |= MS_ACTIVE; - err = logfs_get_sb_final(sb, mnt); - if (err) + err = logfs_get_sb_final(sb); + if (err) { deactivate_locked_super(sb); - return err; + return ERR_PTR(err); + } + return dget(sb->s_root); err1: /* no ->s_root, no ->put_super() */ @@ -592,37 +587,45 @@ err1: iput(super->s_segfile_inode); iput(super->s_mapping_inode); deactivate_locked_super(sb); - return err; -err0: - kfree(super); - //devops->put_device(sb); - return err; + return ERR_PTR(err); } -static int logfs_get_sb(struct file_system_type *type, int flags, - const char *devname, void *data, struct vfsmount *mnt) +static struct dentry *logfs_mount(struct file_system_type *type, int flags, + const char *devname, void *data) { ulong mtdnr; + struct logfs_super *super; + int err; - if (!devname) - return logfs_get_sb_bdev(type, flags, devname, mnt); - if (strncmp(devname, "mtd", 3)) - return logfs_get_sb_bdev(type, flags, devname, mnt); + super = kzalloc(sizeof(*super), GFP_KERNEL); + if (!super) + return ERR_PTR(-ENOMEM); - { + if (!devname) + err = logfs_get_sb_bdev(super, type, devname); + else if (strncmp(devname, "mtd", 3)) + err = logfs_get_sb_bdev(super, type, devname); + else { char *garbage; mtdnr = simple_strtoul(devname+3, &garbage, 0); if (*garbage) - return -EINVAL; + err = -EINVAL; + else + err = logfs_get_sb_mtd(super, mtdnr); + } + + if (err) { + kfree(super); + return ERR_PTR(err); } - return logfs_get_sb_mtd(type, flags, mtdnr, mnt); + return logfs_get_sb_device(super, type, flags); } static struct file_system_type logfs_fs_type = { .owner = THIS_MODULE, .name = "logfs", - .get_sb = logfs_get_sb, + .mount = logfs_mount, .kill_sb = logfs_kill_sb, .fs_flags = FS_REQUIRES_DEV, diff --git a/fs/mbcache.c b/fs/mbcache.c index 9344474..a25444ab 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -76,18 +76,6 @@ EXPORT_SYMBOL(mb_cache_entry_find_first); EXPORT_SYMBOL(mb_cache_entry_find_next); #endif -struct mb_cache { - struct list_head c_cache_list; - const char *c_name; - atomic_t c_entry_count; - int c_max_entries; - int c_bucket_bits; - struct kmem_cache *c_entry_cache; - struct list_head *c_block_hash; - struct list_head *c_index_hash; -}; - - /* * Global data: list of all mbcache's, lru list, and a spinlock for * accessing cache data structures on SMP machines. The lru list is diff --git a/fs/minix/inode.c b/fs/minix/inode.c index e39d6bf..ae0b83f 100644 --- a/fs/minix/inode.c +++ b/fs/minix/inode.c @@ -68,11 +68,18 @@ static struct inode *minix_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void minix_destroy_inode(struct inode *inode) +static void minix_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(minix_inode_cachep, minix_i(inode)); } +static void minix_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, minix_i_callback); +} + static void init_once(void *foo) { struct minix_inode_info *ei = (struct minix_inode_info *) foo; @@ -614,17 +621,16 @@ void minix_truncate(struct inode * inode) V2_minix_truncate(inode); } -static int minix_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *minix_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, minix_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, minix_fill_super); } static struct file_system_type minix_fs_type = { .owner = THIS_MODULE, .name = "minix", - .get_sb = minix_get_sb, + .mount = minix_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/minix/namei.c b/fs/minix/namei.c index c0d35a3..1b9e077 100644 --- a/fs/minix/namei.c +++ b/fs/minix/namei.c @@ -23,7 +23,7 @@ static struct dentry *minix_lookup(struct inode * dir, struct dentry *dentry, st struct inode * inode = NULL; ino_t ino; - dentry->d_op = dir->i_sb->s_root->d_op; + d_set_d_op(dentry, dir->i_sb->s_root->d_op); if (dentry->d_name.len > minix_sb(dir->i_sb)->s_namelen) return ERR_PTR(-ENAMETOOLONG); @@ -169,8 +169,8 @@ EXPORT_SYMBOL(putname); /* * This does basic POSIX ACL permission checking */ -static int acl_permission_check(struct inode *inode, int mask, - int (*check_acl)(struct inode *inode, int mask)) +static int acl_permission_check(struct inode *inode, int mask, unsigned int flags, + int (*check_acl)(struct inode *inode, int mask, unsigned int flags)) { umode_t mode = inode->i_mode; @@ -180,7 +180,7 @@ static int acl_permission_check(struct inode *inode, int mask, mode >>= 6; else { if (IS_POSIXACL(inode) && (mode & S_IRWXG) && check_acl) { - int error = check_acl(inode, mask); + int error = check_acl(inode, mask, flags); if (error != -EAGAIN) return error; } @@ -198,25 +198,30 @@ static int acl_permission_check(struct inode *inode, int mask, } /** - * generic_permission - check for access rights on a Posix-like filesystem + * generic_permission - check for access rights on a Posix-like filesystem * @inode: inode to check access rights for * @mask: right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC) * @check_acl: optional callback to check for Posix ACLs + * @flags: IPERM_FLAG_ flags. * * Used to check for read/write/execute permissions on a file. * We use "fsuid" for this, letting us set arbitrary permissions * for filesystem access without changing the "normal" uids which - * are used for other things.. + * are used for other things. + * + * generic_permission is rcu-walk aware. It returns -ECHILD in case an rcu-walk + * request cannot be satisfied (eg. requires blocking or too much complexity). + * It would then be called again in ref-walk mode. */ -int generic_permission(struct inode *inode, int mask, - int (*check_acl)(struct inode *inode, int mask)) +int generic_permission(struct inode *inode, int mask, unsigned int flags, + int (*check_acl)(struct inode *inode, int mask, unsigned int flags)) { int ret; /* * Do the basic POSIX ACL permission checks. */ - ret = acl_permission_check(inode, mask, check_acl); + ret = acl_permission_check(inode, mask, flags, check_acl); if (ret != -EACCES) return ret; @@ -271,9 +276,10 @@ int inode_permission(struct inode *inode, int mask) } if (inode->i_op->permission) - retval = inode->i_op->permission(inode, mask); + retval = inode->i_op->permission(inode, mask, 0); else - retval = generic_permission(inode, mask, inode->i_op->check_acl); + retval = generic_permission(inode, mask, 0, + inode->i_op->check_acl); if (retval) return retval; @@ -362,6 +368,18 @@ void path_get(struct path *path) EXPORT_SYMBOL(path_get); /** + * path_get_long - get a long reference to a path + * @path: path to get the reference to + * + * Given a path increment the reference count to the dentry and the vfsmount. + */ +void path_get_long(struct path *path) +{ + mntget_long(path->mnt); + dget(path->dentry); +} + +/** * path_put - put a reference to a path * @path: path to put the reference to * @@ -375,6 +393,185 @@ void path_put(struct path *path) EXPORT_SYMBOL(path_put); /** + * path_put_long - put a long reference to a path + * @path: path to put the reference to + * + * Given a path decrement the reference count to the dentry and the vfsmount. + */ +void path_put_long(struct path *path) +{ + dput(path->dentry); + mntput_long(path->mnt); +} + +/** + * nameidata_drop_rcu - drop this nameidata out of rcu-walk + * @nd: nameidata pathwalk data to drop + * Returns: 0 on success, -ECHILD on failure + * + * Path walking has 2 modes, rcu-walk and ref-walk (see + * Documentation/filesystems/path-lookup.txt). __drop_rcu* functions attempt + * to drop out of rcu-walk mode and take normal reference counts on dentries + * and vfsmounts to transition to rcu-walk mode. __drop_rcu* functions take + * refcounts at the last known good point before rcu-walk got stuck, so + * ref-walk may continue from there. If this is not successful (eg. a seqcount + * has changed), then failure is returned and path walk restarts from the + * beginning in ref-walk mode. + * + * nameidata_drop_rcu attempts to drop the current nd->path and nd->root into + * ref-walk. Must be called from rcu-walk context. + */ +static int nameidata_drop_rcu(struct nameidata *nd) +{ + struct fs_struct *fs = current->fs; + struct dentry *dentry = nd->path.dentry; + + BUG_ON(!(nd->flags & LOOKUP_RCU)); + if (nd->root.mnt) { + spin_lock(&fs->lock); + if (nd->root.mnt != fs->root.mnt || + nd->root.dentry != fs->root.dentry) + goto err_root; + } + spin_lock(&dentry->d_lock); + if (!__d_rcu_to_refcount(dentry, nd->seq)) + goto err; + BUG_ON(nd->inode != dentry->d_inode); + spin_unlock(&dentry->d_lock); + if (nd->root.mnt) { + path_get(&nd->root); + spin_unlock(&fs->lock); + } + mntget(nd->path.mnt); + + rcu_read_unlock(); + br_read_unlock(vfsmount_lock); + nd->flags &= ~LOOKUP_RCU; + return 0; +err: + spin_unlock(&dentry->d_lock); +err_root: + if (nd->root.mnt) + spin_unlock(&fs->lock); + return -ECHILD; +} + +/* Try to drop out of rcu-walk mode if we were in it, otherwise do nothing. */ +static inline int nameidata_drop_rcu_maybe(struct nameidata *nd) +{ + if (nd->flags & LOOKUP_RCU) + return nameidata_drop_rcu(nd); + return 0; +} + +/** + * nameidata_dentry_drop_rcu - drop nameidata and dentry out of rcu-walk + * @nd: nameidata pathwalk data to drop + * @dentry: dentry to drop + * Returns: 0 on success, -ECHILD on failure + * + * nameidata_dentry_drop_rcu attempts to drop the current nd->path and nd->root, + * and dentry into ref-walk. @dentry must be a path found by a do_lookup call on + * @nd. Must be called from rcu-walk context. + */ +static int nameidata_dentry_drop_rcu(struct nameidata *nd, struct dentry *dentry) +{ + struct fs_struct *fs = current->fs; + struct dentry *parent = nd->path.dentry; + + BUG_ON(!(nd->flags & LOOKUP_RCU)); + if (nd->root.mnt) { + spin_lock(&fs->lock); + if (nd->root.mnt != fs->root.mnt || + nd->root.dentry != fs->root.dentry) + goto err_root; + } + spin_lock(&parent->d_lock); + spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); + if (!__d_rcu_to_refcount(dentry, nd->seq)) + goto err; + /* + * If the sequence check on the child dentry passed, then the child has + * not been removed from its parent. This means the parent dentry must + * be valid and able to take a reference at this point. + */ + BUG_ON(!IS_ROOT(dentry) && dentry->d_parent != parent); + BUG_ON(!parent->d_count); + parent->d_count++; + spin_unlock(&dentry->d_lock); + spin_unlock(&parent->d_lock); + if (nd->root.mnt) { + path_get(&nd->root); + spin_unlock(&fs->lock); + } + mntget(nd->path.mnt); + + rcu_read_unlock(); + br_read_unlock(vfsmount_lock); + nd->flags &= ~LOOKUP_RCU; + return 0; +err: + spin_unlock(&dentry->d_lock); + spin_unlock(&parent->d_lock); +err_root: + if (nd->root.mnt) + spin_unlock(&fs->lock); + return -ECHILD; +} + +/* Try to drop out of rcu-walk mode if we were in it, otherwise do nothing. */ +static inline int nameidata_dentry_drop_rcu_maybe(struct nameidata *nd, struct dentry *dentry) +{ + if (nd->flags & LOOKUP_RCU) + return nameidata_dentry_drop_rcu(nd, dentry); + return 0; +} + +/** + * nameidata_drop_rcu_last - drop nameidata ending path walk out of rcu-walk + * @nd: nameidata pathwalk data to drop + * Returns: 0 on success, -ECHILD on failure + * + * nameidata_drop_rcu_last attempts to drop the current nd->path into ref-walk. + * nd->path should be the final element of the lookup, so nd->root is discarded. + * Must be called from rcu-walk context. + */ +static int nameidata_drop_rcu_last(struct nameidata *nd) +{ + struct dentry *dentry = nd->path.dentry; + + BUG_ON(!(nd->flags & LOOKUP_RCU)); + nd->flags &= ~LOOKUP_RCU; + nd->root.mnt = NULL; + spin_lock(&dentry->d_lock); + if (!__d_rcu_to_refcount(dentry, nd->seq)) + goto err_unlock; + BUG_ON(nd->inode != dentry->d_inode); + spin_unlock(&dentry->d_lock); + + mntget(nd->path.mnt); + + rcu_read_unlock(); + br_read_unlock(vfsmount_lock); + + return 0; + +err_unlock: + spin_unlock(&dentry->d_lock); + rcu_read_unlock(); + br_read_unlock(vfsmount_lock); + return -ECHILD; +} + +/* Try to drop out of rcu-walk mode if we were in it, otherwise do nothing. */ +static inline int nameidata_drop_rcu_last_maybe(struct nameidata *nd) +{ + if (likely(nd->flags & LOOKUP_RCU)) + return nameidata_drop_rcu_last(nd); + return 0; +} + +/** * release_open_intent - free up open intent resources * @nd: pointer to nameidata */ @@ -386,10 +583,26 @@ void release_open_intent(struct nameidata *nd) fput(nd->intent.open.file); } +static int d_revalidate(struct dentry *dentry, struct nameidata *nd) +{ + int status; + + status = dentry->d_op->d_revalidate(dentry, nd); + if (status == -ECHILD) { + if (nameidata_dentry_drop_rcu(nd, dentry)) + return status; + status = dentry->d_op->d_revalidate(dentry, nd); + } + + return status; +} + static inline struct dentry * do_revalidate(struct dentry *dentry, struct nameidata *nd) { - int status = dentry->d_op->d_revalidate(dentry, nd); + int status; + + status = d_revalidate(dentry, nd); if (unlikely(status <= 0)) { /* * The dentry failed validation. @@ -397,19 +610,36 @@ do_revalidate(struct dentry *dentry, struct nameidata *nd) * the dentry otherwise d_revalidate is asking us * to return a fail status. */ - if (!status) { + if (status < 0) { + /* If we're in rcu-walk, we don't have a ref */ + if (!(nd->flags & LOOKUP_RCU)) + dput(dentry); + dentry = ERR_PTR(status); + + } else { + /* Don't d_invalidate in rcu-walk mode */ + if (nameidata_dentry_drop_rcu_maybe(nd, dentry)) + return ERR_PTR(-ECHILD); if (!d_invalidate(dentry)) { dput(dentry); dentry = NULL; } - } else { - dput(dentry); - dentry = ERR_PTR(status); } } return dentry; } +static inline int need_reval_dot(struct dentry *dentry) +{ + if (likely(!(dentry->d_flags & DCACHE_OP_REVALIDATE))) + return 0; + + if (likely(!(dentry->d_sb->s_type->fs_flags & FS_REVAL_DOT))) + return 0; + + return 1; +} + /* * force_reval_path - force revalidation of a dentry * @@ -433,13 +663,12 @@ force_reval_path(struct path *path, struct nameidata *nd) /* * only check on filesystems where it's possible for the dentry to - * become stale. It's assumed that if this flag is set then the - * d_revalidate op will also be defined. + * become stale. */ - if (!(dentry->d_sb->s_type->fs_flags & FS_REVAL_DOT)) + if (!need_reval_dot(dentry)) return 0; - status = dentry->d_op->d_revalidate(dentry, nd); + status = d_revalidate(dentry, nd); if (status > 0) return 0; @@ -459,26 +688,27 @@ force_reval_path(struct path *path, struct nameidata *nd) * short-cut DAC fails, then call ->permission() to do more * complete permission check. */ -static int exec_permission(struct inode *inode) +static inline int exec_permission(struct inode *inode, unsigned int flags) { int ret; if (inode->i_op->permission) { - ret = inode->i_op->permission(inode, MAY_EXEC); - if (!ret) - goto ok; - return ret; + ret = inode->i_op->permission(inode, MAY_EXEC, flags); + } else { + ret = acl_permission_check(inode, MAY_EXEC, flags, + inode->i_op->check_acl); } - ret = acl_permission_check(inode, MAY_EXEC, inode->i_op->check_acl); - if (!ret) + if (likely(!ret)) goto ok; + if (ret == -ECHILD) + return ret; if (capable(CAP_DAC_OVERRIDE) || capable(CAP_DAC_READ_SEARCH)) goto ok; return ret; ok: - return security_inode_permission(inode, MAY_EXEC); + return security_inode_exec_permission(inode, flags); } static __always_inline void set_root(struct nameidata *nd) @@ -489,8 +719,23 @@ static __always_inline void set_root(struct nameidata *nd) static int link_path_walk(const char *, struct nameidata *); +static __always_inline void set_root_rcu(struct nameidata *nd) +{ + if (!nd->root.mnt) { + struct fs_struct *fs = current->fs; + unsigned seq; + + do { + seq = read_seqcount_begin(&fs->seq); + nd->root = fs->root; + } while (read_seqcount_retry(&fs->seq, seq)); + } +} + static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *link) { + int ret; + if (IS_ERR(link)) goto fail; @@ -500,8 +745,10 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l nd->path = nd->root; path_get(&nd->root); } + nd->inode = nd->path.dentry->d_inode; - return link_path_walk(link, nd); + ret = link_path_walk(link, nd); + return ret; fail: path_put(&nd->path); return PTR_ERR(link); @@ -516,11 +763,12 @@ static void path_put_conditional(struct path *path, struct nameidata *nd) static inline void path_to_nameidata(struct path *path, struct nameidata *nd) { - dput(nd->path.dentry); - if (nd->path.mnt != path->mnt) { - mntput(nd->path.mnt); - nd->path.mnt = path->mnt; + if (!(nd->flags & LOOKUP_RCU)) { + dput(nd->path.dentry); + if (nd->path.mnt != path->mnt) + mntput(nd->path.mnt); } + nd->path.mnt = path->mnt; nd->path.dentry = path->dentry; } @@ -535,9 +783,11 @@ __do_follow_link(struct path *path, struct nameidata *nd, void **p) if (path->mnt != nd->path.mnt) { path_to_nameidata(path, nd); + nd->inode = nd->path.dentry->d_inode; dget(dentry); } mntget(path->mnt); + nd->last_type = LAST_BIND; *p = dentry->d_inode->i_op->follow_link(dentry, nd); error = PTR_ERR(*p); @@ -591,6 +841,20 @@ loop: return err; } +static int follow_up_rcu(struct path *path) +{ + struct vfsmount *parent; + struct dentry *mountpoint; + + parent = path->mnt->mnt_parent; + if (parent == path->mnt) + return 0; + mountpoint = path->mnt->mnt_mountpoint; + path->dentry = mountpoint; + path->mnt = parent; + return 1; +} + int follow_up(struct path *path) { struct vfsmount *parent; @@ -612,9 +876,24 @@ int follow_up(struct path *path) return 1; } -/* no need for dcache_lock, as serialization is taken care in - * namespace.c +/* + * serialization is taken care of in namespace.c */ +static void __follow_mount_rcu(struct nameidata *nd, struct path *path, + struct inode **inode) +{ + while (d_mountpoint(path->dentry)) { + struct vfsmount *mounted; + mounted = __lookup_mnt(path->mnt, path->dentry, 1); + if (!mounted) + return; + path->mnt = mounted; + path->dentry = mounted->mnt_root; + nd->seq = read_seqcount_begin(&path->dentry->d_seq); + *inode = path->dentry->d_inode; + } +} + static int __follow_mount(struct path *path) { int res = 0; @@ -645,9 +924,6 @@ static void follow_mount(struct path *path) } } -/* no need for dcache_lock, as serialization is taken care in - * namespace.c - */ int follow_down(struct path *path) { struct vfsmount *mounted; @@ -663,7 +939,42 @@ int follow_down(struct path *path) return 0; } -static __always_inline void follow_dotdot(struct nameidata *nd) +static int follow_dotdot_rcu(struct nameidata *nd) +{ + struct inode *inode = nd->inode; + + set_root_rcu(nd); + + while(1) { + if (nd->path.dentry == nd->root.dentry && + nd->path.mnt == nd->root.mnt) { + break; + } + if (nd->path.dentry != nd->path.mnt->mnt_root) { + struct dentry *old = nd->path.dentry; + struct dentry *parent = old->d_parent; + unsigned seq; + + seq = read_seqcount_begin(&parent->d_seq); + if (read_seqcount_retry(&old->d_seq, nd->seq)) + return -ECHILD; + inode = parent->d_inode; + nd->path.dentry = parent; + nd->seq = seq; + break; + } + if (!follow_up_rcu(&nd->path)) + break; + nd->seq = read_seqcount_begin(&nd->path.dentry->d_seq); + inode = nd->path.dentry->d_inode; + } + __follow_mount_rcu(nd, &nd->path, &inode); + nd->inode = inode; + + return 0; +} + +static void follow_dotdot(struct nameidata *nd) { set_root(nd); @@ -684,6 +995,7 @@ static __always_inline void follow_dotdot(struct nameidata *nd) break; } follow_mount(&nd->path); + nd->inode = nd->path.dentry->d_inode; } /* @@ -721,17 +1033,17 @@ static struct dentry *d_alloc_and_lookup(struct dentry *parent, * It _is_ time-critical. */ static int do_lookup(struct nameidata *nd, struct qstr *name, - struct path *path) + struct path *path, struct inode **inode) { struct vfsmount *mnt = nd->path.mnt; - struct dentry *dentry, *parent; + struct dentry *dentry, *parent = nd->path.dentry; struct inode *dir; /* * See if the low-level filesystem might want * to use its own hash.. */ - if (nd->path.dentry->d_op && nd->path.dentry->d_op->d_hash) { - int err = nd->path.dentry->d_op->d_hash(nd->path.dentry, name); + if (unlikely(parent->d_flags & DCACHE_OP_HASH)) { + int err = parent->d_op->d_hash(parent, nd->inode, name); if (err < 0) return err; } @@ -741,21 +1053,44 @@ static int do_lookup(struct nameidata *nd, struct qstr *name, * of a false negative due to a concurrent rename, we're going to * do the non-racy lookup, below. */ - dentry = __d_lookup(nd->path.dentry, name); - if (!dentry) - goto need_lookup; + if (nd->flags & LOOKUP_RCU) { + unsigned seq; + + *inode = nd->inode; + dentry = __d_lookup_rcu(parent, name, &seq, inode); + if (!dentry) { + if (nameidata_drop_rcu(nd)) + return -ECHILD; + goto need_lookup; + } + /* Memory barrier in read_seqcount_begin of child is enough */ + if (__read_seqcount_retry(&parent->d_seq, nd->seq)) + return -ECHILD; + + nd->seq = seq; + if (dentry->d_flags & DCACHE_OP_REVALIDATE) + goto need_revalidate; + path->mnt = mnt; + path->dentry = dentry; + __follow_mount_rcu(nd, path, inode); + } else { + dentry = __d_lookup(parent, name); + if (!dentry) + goto need_lookup; found: - if (dentry->d_op && dentry->d_op->d_revalidate) - goto need_revalidate; + if (dentry->d_flags & DCACHE_OP_REVALIDATE) + goto need_revalidate; done: - path->mnt = mnt; - path->dentry = dentry; - __follow_mount(path); + path->mnt = mnt; + path->dentry = dentry; + __follow_mount(path); + *inode = path->dentry->d_inode; + } return 0; need_lookup: - parent = nd->path.dentry; dir = parent->d_inode; + BUG_ON(nd->inode != dir); mutex_lock(&dir->i_mutex); /* @@ -817,7 +1152,6 @@ static inline int follow_on_final(struct inode *inode, unsigned lookup_flags) static int link_path_walk(const char *name, struct nameidata *nd) { struct path next; - struct inode *inode; int err; unsigned int lookup_flags = nd->flags; @@ -826,18 +1160,28 @@ static int link_path_walk(const char *name, struct nameidata *nd) if (!*name) goto return_reval; - inode = nd->path.dentry->d_inode; if (nd->depth) lookup_flags = LOOKUP_FOLLOW | (nd->flags & LOOKUP_CONTINUE); /* At this point we know we have a real path component. */ for(;;) { + struct inode *inode; unsigned long hash; struct qstr this; unsigned int c; nd->flags |= LOOKUP_CONTINUE; - err = exec_permission(inode); + if (nd->flags & LOOKUP_RCU) { + err = exec_permission(nd->inode, IPERM_FLAG_RCU); + if (err == -ECHILD) { + if (nameidata_drop_rcu(nd)) + return -ECHILD; + goto exec_again; + } + } else { +exec_again: + err = exec_permission(nd->inode, 0); + } if (err) break; @@ -868,37 +1212,44 @@ static int link_path_walk(const char *name, struct nameidata *nd) if (this.name[0] == '.') switch (this.len) { default: break; - case 2: + case 2: if (this.name[1] != '.') break; - follow_dotdot(nd); - inode = nd->path.dentry->d_inode; + if (nd->flags & LOOKUP_RCU) { + if (follow_dotdot_rcu(nd)) + return -ECHILD; + } else + follow_dotdot(nd); /* fallthrough */ case 1: continue; } /* This does the actual lookups.. */ - err = do_lookup(nd, &this, &next); + err = do_lookup(nd, &this, &next, &inode); if (err) break; - err = -ENOENT; - inode = next.dentry->d_inode; if (!inode) goto out_dput; if (inode->i_op->follow_link) { + /* We commonly drop rcu-walk here */ + if (nameidata_dentry_drop_rcu_maybe(nd, next.dentry)) + return -ECHILD; + BUG_ON(inode != next.dentry->d_inode); err = do_follow_link(&next, nd); if (err) goto return_err; + nd->inode = nd->path.dentry->d_inode; err = -ENOENT; - inode = nd->path.dentry->d_inode; - if (!inode) + if (!nd->inode) break; - } else + } else { path_to_nameidata(&next, nd); + nd->inode = inode; + } err = -ENOTDIR; - if (!inode->i_op->lookup) + if (!nd->inode->i_op->lookup) break; continue; /* here ends the main loop */ @@ -913,32 +1264,39 @@ last_component: if (this.name[0] == '.') switch (this.len) { default: break; - case 2: + case 2: if (this.name[1] != '.') break; - follow_dotdot(nd); - inode = nd->path.dentry->d_inode; + if (nd->flags & LOOKUP_RCU) { + if (follow_dotdot_rcu(nd)) + return -ECHILD; + } else + follow_dotdot(nd); /* fallthrough */ case 1: goto return_reval; } - err = do_lookup(nd, &this, &next); + err = do_lookup(nd, &this, &next, &inode); if (err) break; - inode = next.dentry->d_inode; if (follow_on_final(inode, lookup_flags)) { + if (nameidata_dentry_drop_rcu_maybe(nd, next.dentry)) + return -ECHILD; + BUG_ON(inode != next.dentry->d_inode); err = do_follow_link(&next, nd); if (err) goto return_err; - inode = nd->path.dentry->d_inode; - } else + nd->inode = nd->path.dentry->d_inode; + } else { path_to_nameidata(&next, nd); + nd->inode = inode; + } err = -ENOENT; - if (!inode) + if (!nd->inode) break; if (lookup_flags & LOOKUP_DIRECTORY) { err = -ENOTDIR; - if (!inode->i_op->lookup) + if (!nd->inode->i_op->lookup) break; } goto return_base; @@ -958,25 +1316,43 @@ return_reval: * We bypassed the ordinary revalidation routines. * We may need to check the cached dentry for staleness. */ - if (nd->path.dentry && nd->path.dentry->d_sb && - (nd->path.dentry->d_sb->s_type->fs_flags & FS_REVAL_DOT)) { - err = -ESTALE; + if (need_reval_dot(nd->path.dentry)) { /* Note: we do not d_invalidate() */ - if (!nd->path.dentry->d_op->d_revalidate( - nd->path.dentry, nd)) + err = d_revalidate(nd->path.dentry, nd); + if (!err) + err = -ESTALE; + if (err < 0) break; } return_base: + if (nameidata_drop_rcu_last_maybe(nd)) + return -ECHILD; return 0; out_dput: - path_put_conditional(&next, nd); + if (!(nd->flags & LOOKUP_RCU)) + path_put_conditional(&next, nd); break; } - path_put(&nd->path); + if (!(nd->flags & LOOKUP_RCU)) + path_put(&nd->path); return_err: return err; } +static inline int path_walk_rcu(const char *name, struct nameidata *nd) +{ + current->total_link_count = 0; + + return link_path_walk(name, nd); +} + +static inline int path_walk_simple(const char *name, struct nameidata *nd) +{ + current->total_link_count = 0; + + return link_path_walk(name, nd); +} + static int path_walk(const char *name, struct nameidata *nd) { struct path save = nd->path; @@ -1002,6 +1378,93 @@ static int path_walk(const char *name, struct nameidata *nd) return result; } +static void path_finish_rcu(struct nameidata *nd) +{ + if (nd->flags & LOOKUP_RCU) { + /* RCU dangling. Cancel it. */ + nd->flags &= ~LOOKUP_RCU; + nd->root.mnt = NULL; + rcu_read_unlock(); + br_read_unlock(vfsmount_lock); + } + if (nd->file) + fput(nd->file); +} + +static int path_init_rcu(int dfd, const char *name, unsigned int flags, struct nameidata *nd) +{ + int retval = 0; + int fput_needed; + struct file *file; + + nd->last_type = LAST_ROOT; /* if there are only slashes... */ + nd->flags = flags | LOOKUP_RCU; + nd->depth = 0; + nd->root.mnt = NULL; + nd->file = NULL; + + if (*name=='/') { + struct fs_struct *fs = current->fs; + unsigned seq; + + br_read_lock(vfsmount_lock); + rcu_read_lock(); + + do { + seq = read_seqcount_begin(&fs->seq); + nd->root = fs->root; + nd->path = nd->root; + nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq); + } while (read_seqcount_retry(&fs->seq, seq)); + + } else if (dfd == AT_FDCWD) { + struct fs_struct *fs = current->fs; + unsigned seq; + + br_read_lock(vfsmount_lock); + rcu_read_lock(); + + do { + seq = read_seqcount_begin(&fs->seq); + nd->path = fs->pwd; + nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq); + } while (read_seqcount_retry(&fs->seq, seq)); + + } else { + struct dentry *dentry; + + file = fget_light(dfd, &fput_needed); + retval = -EBADF; + if (!file) + goto out_fail; + + dentry = file->f_path.dentry; + + retval = -ENOTDIR; + if (!S_ISDIR(dentry->d_inode->i_mode)) + goto fput_fail; + + retval = file_permission(file, MAY_EXEC); + if (retval) + goto fput_fail; + + nd->path = file->f_path; + if (fput_needed) + nd->file = file; + + nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq); + br_read_lock(vfsmount_lock); + rcu_read_lock(); + } + nd->inode = nd->path.dentry->d_inode; + return 0; + +fput_fail: + fput_light(file, fput_needed); +out_fail: + return retval; +} + static int path_init(int dfd, const char *name, unsigned int flags, struct nameidata *nd) { int retval = 0; @@ -1042,6 +1505,7 @@ static int path_init(int dfd, const char *name, unsigned int flags, struct namei fput_light(file, fput_needed); } + nd->inode = nd->path.dentry->d_inode; return 0; fput_fail: @@ -1054,16 +1518,53 @@ out_fail: static int do_path_lookup(int dfd, const char *name, unsigned int flags, struct nameidata *nd) { - int retval = path_init(dfd, name, flags, nd); - if (!retval) - retval = path_walk(name, nd); - if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry && - nd->path.dentry->d_inode)) - audit_inode(name, nd->path.dentry); + int retval; + + /* + * Path walking is largely split up into 2 different synchronisation + * schemes, rcu-walk and ref-walk (explained in + * Documentation/filesystems/path-lookup.txt). These share much of the + * path walk code, but some things particularly setup, cleanup, and + * following mounts are sufficiently divergent that functions are + * duplicated. Typically there is a function foo(), and its RCU + * analogue, foo_rcu(). + * + * -ECHILD is the error number of choice (just to avoid clashes) that + * is returned if some aspect of an rcu-walk fails. Such an error must + * be handled by restarting a traditional ref-walk (which will always + * be able to complete). + */ + retval = path_init_rcu(dfd, name, flags, nd); + if (unlikely(retval)) + return retval; + retval = path_walk_rcu(name, nd); + path_finish_rcu(nd); if (nd->root.mnt) { path_put(&nd->root); nd->root.mnt = NULL; } + + if (unlikely(retval == -ECHILD || retval == -ESTALE)) { + /* slower, locked walk */ + if (retval == -ESTALE) + flags |= LOOKUP_REVAL; + retval = path_init(dfd, name, flags, nd); + if (unlikely(retval)) + return retval; + retval = path_walk(name, nd); + if (nd->root.mnt) { + path_put(&nd->root); + nd->root.mnt = NULL; + } + } + + if (likely(!retval)) { + if (unlikely(!audit_dummy_context())) { + if (nd->path.dentry && nd->inode) + audit_inode(name, nd->path.dentry); + } + } + return retval; } @@ -1106,10 +1607,11 @@ int vfs_path_lookup(struct dentry *dentry, struct vfsmount *mnt, path_get(&nd->path); nd->root = nd->path; path_get(&nd->root); + nd->inode = nd->path.dentry->d_inode; retval = path_walk(name, nd); if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry && - nd->path.dentry->d_inode)) + nd->inode)) audit_inode(name, nd->path.dentry); path_put(&nd->root); @@ -1125,7 +1627,7 @@ static struct dentry *__lookup_hash(struct qstr *name, struct dentry *dentry; int err; - err = exec_permission(inode); + err = exec_permission(inode, 0); if (err) return ERR_PTR(err); @@ -1133,8 +1635,8 @@ static struct dentry *__lookup_hash(struct qstr *name, * See if the low-level filesystem might want * to use its own hash.. */ - if (base->d_op && base->d_op->d_hash) { - err = base->d_op->d_hash(base, name); + if (base->d_flags & DCACHE_OP_HASH) { + err = base->d_op->d_hash(base, inode, name); dentry = ERR_PTR(err); if (err < 0) goto out; @@ -1147,7 +1649,7 @@ static struct dentry *__lookup_hash(struct qstr *name, */ dentry = d_lookup(base, name); - if (dentry && dentry->d_op && dentry->d_op->d_revalidate) + if (dentry && (dentry->d_flags & DCACHE_OP_REVALIDATE)) dentry = do_revalidate(dentry, nd); if (!dentry) @@ -1490,6 +1992,7 @@ out_unlock: mutex_unlock(&dir->d_inode->i_mutex); dput(nd->path.dentry); nd->path.dentry = path->dentry; + if (error) return error; /* Don't check for write permission, don't truncate */ @@ -1574,6 +2077,7 @@ static struct file *finish_open(struct nameidata *nd, */ if (will_truncate) mnt_drop_write(nd->path.mnt); + path_put(&nd->path); return filp; exit: @@ -1583,6 +2087,9 @@ exit: return ERR_PTR(error); } +/* + * Handle O_CREAT case for do_filp_open + */ static struct file *do_last(struct nameidata *nd, struct path *path, int open_flag, int acc_mode, int mode, const char *pathname) @@ -1596,50 +2103,25 @@ static struct file *do_last(struct nameidata *nd, struct path *path, follow_dotdot(nd); dir = nd->path.dentry; case LAST_DOT: - if (nd->path.mnt->mnt_sb->s_type->fs_flags & FS_REVAL_DOT) { - if (!dir->d_op->d_revalidate(dir, nd)) { + if (need_reval_dot(dir)) { + error = d_revalidate(nd->path.dentry, nd); + if (!error) error = -ESTALE; + if (error < 0) goto exit; - } } /* fallthrough */ case LAST_ROOT: - if (open_flag & O_CREAT) - goto exit; - /* fallthrough */ + goto exit; case LAST_BIND: audit_inode(pathname, dir); goto ok; } /* trailing slashes? */ - if (nd->last.name[nd->last.len]) { - if (open_flag & O_CREAT) - goto exit; - nd->flags |= LOOKUP_DIRECTORY | LOOKUP_FOLLOW; - } - - /* just plain open? */ - if (!(open_flag & O_CREAT)) { - error = do_lookup(nd, &nd->last, path); - if (error) - goto exit; - error = -ENOENT; - if (!path->dentry->d_inode) - goto exit_dput; - if (path->dentry->d_inode->i_op->follow_link) - return NULL; - error = -ENOTDIR; - if (nd->flags & LOOKUP_DIRECTORY) { - if (!path->dentry->d_inode->i_op->lookup) - goto exit_dput; - } - path_to_nameidata(path, nd); - audit_inode(pathname, nd->path.dentry); - goto ok; - } + if (nd->last.name[nd->last.len]) + goto exit; - /* OK, it's O_CREAT */ mutex_lock(&dir->d_inode->i_mutex); path->dentry = lookup_hash(nd); @@ -1675,6 +2157,7 @@ static struct file *do_last(struct nameidata *nd, struct path *path, } filp = nameidata_to_filp(nd); mnt_drop_write(nd->path.mnt); + path_put(&nd->path); if (!IS_ERR(filp)) { error = ima_file_check(filp, acc_mode); if (error) { @@ -1709,8 +2192,9 @@ static struct file *do_last(struct nameidata *nd, struct path *path, return NULL; path_to_nameidata(path, nd); + nd->inode = path->dentry->d_inode; error = -EISDIR; - if (S_ISDIR(path->dentry->d_inode->i_mode)) + if (S_ISDIR(nd->inode->i_mode)) goto exit; ok: filp = finish_open(nd, open_flag, acc_mode); @@ -1741,11 +2225,14 @@ struct file *do_filp_open(int dfd, const char *pathname, struct path path; int count = 0; int flag = open_to_namei_flags(open_flag); - int force_reval = 0; + int flags; if (!(open_flag & O_CREAT)) mode = 0; + /* Must never be set by userspace */ + open_flag &= ~FMODE_NONOTIFY; + /* * O_SYNC is implemented as __O_SYNC|O_DSYNC. As many places only * check for O_DSYNC if the need any syncing at all we enforce it's @@ -1767,54 +2254,84 @@ struct file *do_filp_open(int dfd, const char *pathname, if (open_flag & O_APPEND) acc_mode |= MAY_APPEND; - /* find the parent */ -reval: - error = path_init(dfd, pathname, LOOKUP_PARENT, &nd); + flags = LOOKUP_OPEN; + if (open_flag & O_CREAT) { + flags |= LOOKUP_CREATE; + if (open_flag & O_EXCL) + flags |= LOOKUP_EXCL; + } + if (open_flag & O_DIRECTORY) + flags |= LOOKUP_DIRECTORY; + if (!(open_flag & O_NOFOLLOW)) + flags |= LOOKUP_FOLLOW; + + filp = get_empty_filp(); + if (!filp) + return ERR_PTR(-ENFILE); + + filp->f_flags = open_flag; + nd.intent.open.file = filp; + nd.intent.open.flags = flag; + nd.intent.open.create_mode = mode; + + if (open_flag & O_CREAT) + goto creat; + + /* !O_CREAT, simple open */ + error = do_path_lookup(dfd, pathname, flags, &nd); + if (unlikely(error)) + goto out_filp; + error = -ELOOP; + if (!(nd.flags & LOOKUP_FOLLOW)) { + if (nd.inode->i_op->follow_link) + goto out_path; + } + error = -ENOTDIR; + if (nd.flags & LOOKUP_DIRECTORY) { + if (!nd.inode->i_op->lookup) + goto out_path; + } + audit_inode(pathname, nd.path.dentry); + filp = finish_open(&nd, open_flag, acc_mode); + return filp; + +creat: + /* OK, have to create the file. Find the parent. */ + error = path_init_rcu(dfd, pathname, + LOOKUP_PARENT | (flags & LOOKUP_REVAL), &nd); if (error) - return ERR_PTR(error); - if (force_reval) - nd.flags |= LOOKUP_REVAL; + goto out_filp; + error = path_walk_rcu(pathname, &nd); + path_finish_rcu(&nd); + if (unlikely(error == -ECHILD || error == -ESTALE)) { + /* slower, locked walk */ + if (error == -ESTALE) { +reval: + flags |= LOOKUP_REVAL; + } + error = path_init(dfd, pathname, + LOOKUP_PARENT | (flags & LOOKUP_REVAL), &nd); + if (error) + goto out_filp; - current->total_link_count = 0; - error = link_path_walk(pathname, &nd); - if (error) { - filp = ERR_PTR(error); - goto out; + error = path_walk_simple(pathname, &nd); } - if (unlikely(!audit_dummy_context()) && (open_flag & O_CREAT)) + if (unlikely(error)) + goto out_filp; + if (unlikely(!audit_dummy_context())) audit_inode(pathname, nd.path.dentry); /* * We have the parent and last component. */ - - error = -ENFILE; - filp = get_empty_filp(); - if (filp == NULL) - goto exit_parent; - nd.intent.open.file = filp; - filp->f_flags = open_flag; - nd.intent.open.flags = flag; - nd.intent.open.create_mode = mode; - nd.flags &= ~LOOKUP_PARENT; - nd.flags |= LOOKUP_OPEN; - if (open_flag & O_CREAT) { - nd.flags |= LOOKUP_CREATE; - if (open_flag & O_EXCL) - nd.flags |= LOOKUP_EXCL; - } - if (open_flag & O_DIRECTORY) - nd.flags |= LOOKUP_DIRECTORY; - if (!(open_flag & O_NOFOLLOW)) - nd.flags |= LOOKUP_FOLLOW; + nd.flags = flags; filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); while (unlikely(!filp)) { /* trailing symlink */ struct path holder; - struct inode *inode = path.dentry->d_inode; void *cookie; error = -ELOOP; /* S_ISDIR part is a temporary automount kludge */ - if (!(nd.flags & LOOKUP_FOLLOW) && !S_ISDIR(inode->i_mode)) + if (!(nd.flags & LOOKUP_FOLLOW) && !S_ISDIR(nd.inode->i_mode)) goto exit_dput; if (count++ == 32) goto exit_dput; @@ -1835,36 +2352,33 @@ reval: goto exit_dput; error = __do_follow_link(&path, &nd, &cookie); if (unlikely(error)) { + if (!IS_ERR(cookie) && nd.inode->i_op->put_link) + nd.inode->i_op->put_link(path.dentry, &nd, cookie); /* nd.path had been dropped */ - if (!IS_ERR(cookie) && inode->i_op->put_link) - inode->i_op->put_link(path.dentry, &nd, cookie); - path_put(&path); - release_open_intent(&nd); - filp = ERR_PTR(error); - goto out; + nd.path = path; + goto out_path; } holder = path; nd.flags &= ~LOOKUP_PARENT; filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname); - if (inode->i_op->put_link) - inode->i_op->put_link(holder.dentry, &nd, cookie); + if (nd.inode->i_op->put_link) + nd.inode->i_op->put_link(holder.dentry, &nd, cookie); path_put(&holder); } out: if (nd.root.mnt) path_put(&nd.root); - if (filp == ERR_PTR(-ESTALE) && !force_reval) { - force_reval = 1; + if (filp == ERR_PTR(-ESTALE) && !(flags & LOOKUP_REVAL)) goto reval; - } return filp; exit_dput: path_put_conditional(&path, &nd); +out_path: + path_put(&nd.path); +out_filp: if (!IS_ERR(nd.intent.open.file)) release_open_intent(&nd); -exit_parent: - path_put(&nd.path); filp = ERR_PTR(error); goto out; } @@ -2125,12 +2639,10 @@ void dentry_unhash(struct dentry *dentry) { dget(dentry); shrink_dcache_parent(dentry); - spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); - if (atomic_read(&dentry->d_count) == 2) + if (dentry->d_count == 2) __d_drop(dentry); spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); } int vfs_rmdir(struct inode *dir, struct dentry *dentry) diff --git a/fs/namespace.c b/fs/namespace.c index 8a415c9..3ddfd90 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -13,7 +13,6 @@ #include <linux/sched.h> #include <linux/spinlock.h> #include <linux/percpu.h> -#include <linux/smp_lock.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/acct.h> @@ -139,6 +138,64 @@ void mnt_release_group_id(struct vfsmount *mnt) mnt->mnt_group_id = 0; } +/* + * vfsmount lock must be held for read + */ +static inline void mnt_add_count(struct vfsmount *mnt, int n) +{ +#ifdef CONFIG_SMP + this_cpu_add(mnt->mnt_pcp->mnt_count, n); +#else + preempt_disable(); + mnt->mnt_count += n; + preempt_enable(); +#endif +} + +static inline void mnt_set_count(struct vfsmount *mnt, int n) +{ +#ifdef CONFIG_SMP + this_cpu_write(mnt->mnt_pcp->mnt_count, n); +#else + mnt->mnt_count = n; +#endif +} + +/* + * vfsmount lock must be held for read + */ +static inline void mnt_inc_count(struct vfsmount *mnt) +{ + mnt_add_count(mnt, 1); +} + +/* + * vfsmount lock must be held for read + */ +static inline void mnt_dec_count(struct vfsmount *mnt) +{ + mnt_add_count(mnt, -1); +} + +/* + * vfsmount lock must be held for write + */ +unsigned int mnt_get_count(struct vfsmount *mnt) +{ +#ifdef CONFIG_SMP + unsigned int count = atomic_read(&mnt->mnt_longrefs); + int cpu; + + for_each_possible_cpu(cpu) { + count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_count; + } + + return count; +#else + return mnt->mnt_count; +#endif +} + struct vfsmount *alloc_vfsmnt(const char *name) { struct vfsmount *mnt = kmem_cache_zalloc(mnt_cache, GFP_KERNEL); @@ -155,7 +212,17 @@ struct vfsmount *alloc_vfsmnt(const char *name) goto out_free_id; } - atomic_set(&mnt->mnt_count, 1); +#ifdef CONFIG_SMP + mnt->mnt_pcp = alloc_percpu(struct mnt_pcp); + if (!mnt->mnt_pcp) + goto out_free_devname; + + atomic_set(&mnt->mnt_longrefs, 1); +#else + mnt->mnt_count = 1; + mnt->mnt_writers = 0; +#endif + INIT_LIST_HEAD(&mnt->mnt_hash); INIT_LIST_HEAD(&mnt->mnt_child); INIT_LIST_HEAD(&mnt->mnt_mounts); @@ -167,13 +234,6 @@ struct vfsmount *alloc_vfsmnt(const char *name) #ifdef CONFIG_FSNOTIFY INIT_HLIST_HEAD(&mnt->mnt_fsnotify_marks); #endif -#ifdef CONFIG_SMP - mnt->mnt_writers = alloc_percpu(int); - if (!mnt->mnt_writers) - goto out_free_devname; -#else - mnt->mnt_writers = 0; -#endif } return mnt; @@ -217,32 +277,32 @@ int __mnt_is_readonly(struct vfsmount *mnt) } EXPORT_SYMBOL_GPL(__mnt_is_readonly); -static inline void inc_mnt_writers(struct vfsmount *mnt) +static inline void mnt_inc_writers(struct vfsmount *mnt) { #ifdef CONFIG_SMP - (*per_cpu_ptr(mnt->mnt_writers, smp_processor_id()))++; + this_cpu_inc(mnt->mnt_pcp->mnt_writers); #else mnt->mnt_writers++; #endif } -static inline void dec_mnt_writers(struct vfsmount *mnt) +static inline void mnt_dec_writers(struct vfsmount *mnt) { #ifdef CONFIG_SMP - (*per_cpu_ptr(mnt->mnt_writers, smp_processor_id()))--; + this_cpu_dec(mnt->mnt_pcp->mnt_writers); #else mnt->mnt_writers--; #endif } -static unsigned int count_mnt_writers(struct vfsmount *mnt) +static unsigned int mnt_get_writers(struct vfsmount *mnt) { #ifdef CONFIG_SMP unsigned int count = 0; int cpu; for_each_possible_cpu(cpu) { - count += *per_cpu_ptr(mnt->mnt_writers, cpu); + count += per_cpu_ptr(mnt->mnt_pcp, cpu)->mnt_writers; } return count; @@ -274,9 +334,9 @@ int mnt_want_write(struct vfsmount *mnt) int ret = 0; preempt_disable(); - inc_mnt_writers(mnt); + mnt_inc_writers(mnt); /* - * The store to inc_mnt_writers must be visible before we pass + * The store to mnt_inc_writers must be visible before we pass * MNT_WRITE_HOLD loop below, so that the slowpath can see our * incremented count after it has set MNT_WRITE_HOLD. */ @@ -290,7 +350,7 @@ int mnt_want_write(struct vfsmount *mnt) */ smp_rmb(); if (__mnt_is_readonly(mnt)) { - dec_mnt_writers(mnt); + mnt_dec_writers(mnt); ret = -EROFS; goto out; } @@ -318,7 +378,7 @@ int mnt_clone_write(struct vfsmount *mnt) if (__mnt_is_readonly(mnt)) return -EROFS; preempt_disable(); - inc_mnt_writers(mnt); + mnt_inc_writers(mnt); preempt_enable(); return 0; } @@ -352,7 +412,7 @@ EXPORT_SYMBOL_GPL(mnt_want_write_file); void mnt_drop_write(struct vfsmount *mnt) { preempt_disable(); - dec_mnt_writers(mnt); + mnt_dec_writers(mnt); preempt_enable(); } EXPORT_SYMBOL_GPL(mnt_drop_write); @@ -385,7 +445,7 @@ static int mnt_make_readonly(struct vfsmount *mnt) * MNT_WRITE_HOLD, so it can't be decremented by another CPU while * we're counting up here. */ - if (count_mnt_writers(mnt) > 0) + if (mnt_get_writers(mnt) > 0) ret = -EBUSY; else mnt->mnt_flags |= MNT_READONLY; @@ -419,7 +479,7 @@ void free_vfsmnt(struct vfsmount *mnt) kfree(mnt->mnt_devname); mnt_free_id(mnt); #ifdef CONFIG_SMP - free_percpu(mnt->mnt_writers); + free_percpu(mnt->mnt_pcp); #endif kmem_cache_free(mnt_cache, mnt); } @@ -493,6 +553,27 @@ static void __touch_mnt_namespace(struct mnt_namespace *ns) } /* + * Clear dentry's mounted state if it has no remaining mounts. + * vfsmount_lock must be held for write. + */ +static void dentry_reset_mounted(struct vfsmount *mnt, struct dentry *dentry) +{ + unsigned u; + + for (u = 0; u < HASH_SIZE; u++) { + struct vfsmount *p; + + list_for_each_entry(p, &mount_hashtable[u], mnt_hash) { + if (p->mnt_mountpoint == dentry) + return; + } + } + spin_lock(&dentry->d_lock); + dentry->d_flags &= ~DCACHE_MOUNTED; + spin_unlock(&dentry->d_lock); +} + +/* * vfsmount lock must be held for write */ static void detach_mnt(struct vfsmount *mnt, struct path *old_path) @@ -503,7 +584,7 @@ static void detach_mnt(struct vfsmount *mnt, struct path *old_path) mnt->mnt_mountpoint = mnt->mnt_root; list_del_init(&mnt->mnt_child); list_del_init(&mnt->mnt_hash); - old_path->dentry->d_mounted--; + dentry_reset_mounted(old_path->mnt, old_path->dentry); } /* @@ -514,7 +595,9 @@ void mnt_set_mountpoint(struct vfsmount *mnt, struct dentry *dentry, { child_mnt->mnt_parent = mntget(mnt); child_mnt->mnt_mountpoint = dget(dentry); - dentry->d_mounted++; + spin_lock(&dentry->d_lock); + dentry->d_flags |= DCACHE_MOUNTED; + spin_unlock(&dentry->d_lock); } /* @@ -630,9 +713,10 @@ static struct vfsmount *clone_mnt(struct vfsmount *old, struct dentry *root, return NULL; } -static inline void __mntput(struct vfsmount *mnt) +static inline void mntfree(struct vfsmount *mnt) { struct super_block *sb = mnt->mnt_sb; + /* * This probably indicates that somebody messed * up a mnt_want/drop_write() pair. If this @@ -640,38 +724,123 @@ static inline void __mntput(struct vfsmount *mnt) * to make r/w->r/o transitions. */ /* - * atomic_dec_and_lock() used to deal with ->mnt_count decrements - * provides barriers, so count_mnt_writers() below is safe. AV + * The locking used to deal with mnt_count decrement provides barriers, + * so mnt_get_writers() below is safe. */ - WARN_ON(count_mnt_writers(mnt)); + WARN_ON(mnt_get_writers(mnt)); fsnotify_vfsmount_delete(mnt); dput(mnt->mnt_root); free_vfsmnt(mnt); deactivate_super(sb); } -void mntput_no_expire(struct vfsmount *mnt) -{ -repeat: - if (atomic_add_unless(&mnt->mnt_count, -1, 1)) - return; +#ifdef CONFIG_SMP +static inline void __mntput(struct vfsmount *mnt, int longrefs) +{ + if (!longrefs) { +put_again: + br_read_lock(vfsmount_lock); + if (likely(atomic_read(&mnt->mnt_longrefs))) { + mnt_dec_count(mnt); + br_read_unlock(vfsmount_lock); + return; + } + br_read_unlock(vfsmount_lock); + } else { + BUG_ON(!atomic_read(&mnt->mnt_longrefs)); + if (atomic_add_unless(&mnt->mnt_longrefs, -1, 1)) + return; + } + br_write_lock(vfsmount_lock); - if (!atomic_dec_and_test(&mnt->mnt_count)) { + if (!longrefs) + mnt_dec_count(mnt); + else + atomic_dec(&mnt->mnt_longrefs); + if (mnt_get_count(mnt)) { br_write_unlock(vfsmount_lock); return; } - if (likely(!mnt->mnt_pinned)) { + if (unlikely(mnt->mnt_pinned)) { + mnt_add_count(mnt, mnt->mnt_pinned + 1); + mnt->mnt_pinned = 0; br_write_unlock(vfsmount_lock); - __mntput(mnt); + acct_auto_close_mnt(mnt); + goto put_again; + } + br_write_unlock(vfsmount_lock); + mntfree(mnt); +} +#else +static inline void __mntput(struct vfsmount *mnt, int longrefs) +{ +put_again: + mnt_dec_count(mnt); + if (likely(mnt_get_count(mnt))) return; + br_write_lock(vfsmount_lock); + if (unlikely(mnt->mnt_pinned)) { + mnt_add_count(mnt, mnt->mnt_pinned + 1); + mnt->mnt_pinned = 0; + br_write_unlock(vfsmount_lock); + acct_auto_close_mnt(mnt); + goto put_again; } - atomic_add(mnt->mnt_pinned + 1, &mnt->mnt_count); - mnt->mnt_pinned = 0; br_write_unlock(vfsmount_lock); - acct_auto_close_mnt(mnt); - goto repeat; + mntfree(mnt); +} +#endif + +static void mntput_no_expire(struct vfsmount *mnt) +{ + __mntput(mnt, 0); +} + +void mntput(struct vfsmount *mnt) +{ + if (mnt) { + /* avoid cacheline pingpong, hope gcc doesn't get "smart" */ + if (unlikely(mnt->mnt_expiry_mark)) + mnt->mnt_expiry_mark = 0; + __mntput(mnt, 0); + } +} +EXPORT_SYMBOL(mntput); + +struct vfsmount *mntget(struct vfsmount *mnt) +{ + if (mnt) + mnt_inc_count(mnt); + return mnt; } -EXPORT_SYMBOL(mntput_no_expire); +EXPORT_SYMBOL(mntget); + +void mntput_long(struct vfsmount *mnt) +{ +#ifdef CONFIG_SMP + if (mnt) { + /* avoid cacheline pingpong, hope gcc doesn't get "smart" */ + if (unlikely(mnt->mnt_expiry_mark)) + mnt->mnt_expiry_mark = 0; + __mntput(mnt, 1); + } +#else + mntput(mnt); +#endif +} +EXPORT_SYMBOL(mntput_long); + +struct vfsmount *mntget_long(struct vfsmount *mnt) +{ +#ifdef CONFIG_SMP + if (mnt) + atomic_inc(&mnt->mnt_longrefs); + return mnt; +#else + return mntget(mnt); +#endif +} +EXPORT_SYMBOL(mntget_long); void mnt_pin(struct vfsmount *mnt) { @@ -679,19 +848,17 @@ void mnt_pin(struct vfsmount *mnt) mnt->mnt_pinned++; br_write_unlock(vfsmount_lock); } - EXPORT_SYMBOL(mnt_pin); void mnt_unpin(struct vfsmount *mnt) { br_write_lock(vfsmount_lock); if (mnt->mnt_pinned) { - atomic_inc(&mnt->mnt_count); + mnt_inc_count(mnt); mnt->mnt_pinned--; } br_write_unlock(vfsmount_lock); } - EXPORT_SYMBOL(mnt_unpin); static inline void mangle(struct seq_file *m, const char *s) @@ -986,12 +1153,13 @@ int may_umount_tree(struct vfsmount *mnt) int minimum_refs = 0; struct vfsmount *p; - br_read_lock(vfsmount_lock); + /* write lock needed for mnt_get_count */ + br_write_lock(vfsmount_lock); for (p = mnt; p; p = next_mnt(p, mnt)) { - actual_refs += atomic_read(&p->mnt_count); + actual_refs += mnt_get_count(p); minimum_refs += 2; } - br_read_unlock(vfsmount_lock); + br_write_unlock(vfsmount_lock); if (actual_refs > minimum_refs) return 0; @@ -1018,10 +1186,10 @@ int may_umount(struct vfsmount *mnt) { int ret = 1; down_read(&namespace_sem); - br_read_lock(vfsmount_lock); + br_write_lock(vfsmount_lock); if (propagate_mount_busy(mnt, 2)) ret = 0; - br_read_unlock(vfsmount_lock); + br_write_unlock(vfsmount_lock); up_read(&namespace_sem); return ret; } @@ -1048,7 +1216,7 @@ void release_mounts(struct list_head *head) dput(dentry); mntput(m); } - mntput(mnt); + mntput_long(mnt); } } @@ -1074,7 +1242,7 @@ void umount_tree(struct vfsmount *mnt, int propagate, struct list_head *kill) list_del_init(&p->mnt_child); if (p->mnt_parent != p) { p->mnt_parent->mnt_ghosts++; - p->mnt_mountpoint->d_mounted--; + dentry_reset_mounted(p->mnt_parent, p->mnt_mountpoint); } change_mnt_propagation(p, MS_PRIVATE); } @@ -1103,8 +1271,16 @@ static int do_umount(struct vfsmount *mnt, int flags) flags & (MNT_FORCE | MNT_DETACH)) return -EINVAL; - if (atomic_read(&mnt->mnt_count) != 2) + /* + * probably don't strictly need the lock here if we examined + * all race cases, but it's a slowpath. + */ + br_write_lock(vfsmount_lock); + if (mnt_get_count(mnt) != 2) { + br_write_lock(vfsmount_lock); return -EBUSY; + } + br_write_unlock(vfsmount_lock); if (!xchg(&mnt->mnt_expiry_mark, 1)) return -EAGAIN; @@ -1793,7 +1969,7 @@ int do_add_mount(struct vfsmount *newmnt, struct path *path, unlock: up_write(&namespace_sem); - mntput(newmnt); + mntput_long(newmnt); return err; } @@ -2126,11 +2302,11 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, if (fs) { if (p == fs->root.mnt) { rootmnt = p; - fs->root.mnt = mntget(q); + fs->root.mnt = mntget_long(q); } if (p == fs->pwd.mnt) { pwdmnt = p; - fs->pwd.mnt = mntget(q); + fs->pwd.mnt = mntget_long(q); } } p = next_mnt(p, mnt_ns->root); @@ -2139,9 +2315,9 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns, up_write(&namespace_sem); if (rootmnt) - mntput(rootmnt); + mntput_long(rootmnt); if (pwdmnt) - mntput(pwdmnt); + mntput_long(pwdmnt); return new_ns; } @@ -2328,6 +2504,7 @@ SYSCALL_DEFINE2(pivot_root, const char __user *, new_root, touch_mnt_namespace(current->nsproxy->mnt_ns); br_write_unlock(vfsmount_lock); chroot_fs_refs(&root, &new); + error = 0; path_put(&root_parent); path_put(&parent_path); @@ -2354,6 +2531,7 @@ static void __init init_mount_tree(void) mnt = do_kern_mount("rootfs", 0, "rootfs", NULL); if (IS_ERR(mnt)) panic("Can't create rootfs"); + ns = create_mnt_ns(mnt); if (IS_ERR(ns)) panic("Can't allocate initial namespace"); diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c index aac8832e..28f136d 100644 --- a/fs/ncpfs/dir.c +++ b/fs/ncpfs/dir.c @@ -17,9 +17,9 @@ #include <linux/kernel.h> #include <linux/vmalloc.h> #include <linux/mm.h> +#include <linux/namei.h> #include <asm/uaccess.h> #include <asm/byteorder.h> -#include <linux/smp_lock.h> #include <linux/ncp_fs.h> @@ -75,9 +75,12 @@ const struct inode_operations ncp_dir_inode_operations = * Dentry operations routines */ static int ncp_lookup_validate(struct dentry *, struct nameidata *); -static int ncp_hash_dentry(struct dentry *, struct qstr *); -static int ncp_compare_dentry (struct dentry *, struct qstr *, struct qstr *); -static int ncp_delete_dentry(struct dentry *); +static int ncp_hash_dentry(const struct dentry *, const struct inode *, + struct qstr *); +static int ncp_compare_dentry(const struct dentry *, const struct inode *, + const struct dentry *, const struct inode *, + unsigned int, const char *, const struct qstr *); +static int ncp_delete_dentry(const struct dentry *); static const struct dentry_operations ncp_dentry_operations = { @@ -114,10 +117,10 @@ static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator) #define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS) -static inline int ncp_case_sensitive(struct dentry *dentry) +static inline int ncp_case_sensitive(const struct inode *i) { #ifdef CONFIG_NCPFS_NFS_NS - return ncp_namespace(dentry->d_inode) == NW_NS_NFS; + return ncp_namespace(i) == NW_NS_NFS; #else return 0; #endif /* CONFIG_NCPFS_NFS_NS */ @@ -128,14 +131,16 @@ static inline int ncp_case_sensitive(struct dentry *dentry) * is case-sensitive. */ static int -ncp_hash_dentry(struct dentry *dentry, struct qstr *this) +ncp_hash_dentry(const struct dentry *dentry, const struct inode *inode, + struct qstr *this) { - if (!ncp_case_sensitive(dentry)) { + if (!ncp_case_sensitive(inode)) { + struct super_block *sb = dentry->d_sb; struct nls_table *t; unsigned long hash; int i; - t = NCP_IO_TABLE(dentry); + t = NCP_IO_TABLE(sb); hash = init_name_hash(); for (i=0; i<this->len ; i++) hash = partial_name_hash(ncp_tolower(t, this->name[i]), @@ -146,15 +151,17 @@ ncp_hash_dentry(struct dentry *dentry, struct qstr *this) } static int -ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) +ncp_compare_dentry(const struct dentry *parent, const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - if (a->len != b->len) + if (len != name->len) return 1; - if (ncp_case_sensitive(dentry)) - return strncmp(a->name, b->name, a->len); + if (ncp_case_sensitive(pinode)) + return strncmp(str, name->name, len); - return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len); + return ncp_strnicmp(NCP_IO_TABLE(pinode->i_sb), str, name->name, len); } /* @@ -163,7 +170,7 @@ ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) * Closing files can be safely postponed until iput() - it's done there anyway. */ static int -ncp_delete_dentry(struct dentry * dentry) +ncp_delete_dentry(const struct dentry * dentry) { struct inode *inode = dentry->d_inode; @@ -302,6 +309,9 @@ ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd) int res, val = 0, len; __u8 __name[NCP_MAXPATHLEN + 1]; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + parent = dget_parent(dentry); dir = parent->d_inode; @@ -385,21 +395,21 @@ ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) } /* If a pointer is invalid, we search the dentry. */ - spin_lock(&dcache_lock); + spin_lock(&parent->d_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { dent = list_entry(next, struct dentry, d_u.d_child); if ((unsigned long)dent->d_fsdata == fpos) { if (dent->d_inode) - dget_locked(dent); + dget(dent); else dent = NULL; - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); goto out; } next = next->next; } - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); return NULL; out: @@ -593,7 +603,7 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, qname.hash = full_name_hash(qname.name, qname.len); if (dentry->d_op && dentry->d_op->d_hash) - if (dentry->d_op->d_hash(dentry, &qname) != 0) + if (dentry->d_op->d_hash(dentry, dentry->d_inode, &qname) != 0) goto end_advance; newdent = d_lookup(dentry, &qname); @@ -612,35 +622,12 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, shrink_dcache_parent(newdent); /* - * It is not as dangerous as it looks. NetWare's OS2 namespace is - * case preserving yet case insensitive. So we update dentry's name - * as received from server. We found dentry via d_lookup with our - * hash, so we know that hash does not change, and so replacing name - * should be reasonably safe. + * NetWare's OS2 namespace is case preserving yet case + * insensitive. So we update dentry's name as received from + * server. Parent dir's i_mutex is locked because we're in + * readdir. */ - if (qname.len == newdent->d_name.len && - memcmp(newdent->d_name.name, qname.name, newdent->d_name.len)) { - struct inode *inode = newdent->d_inode; - - /* - * Inside ncpfs all uses of d_name are either for debugging, - * or on functions which acquire inode mutex (mknod, creat, - * lookup). So grab i_mutex here, to be sure. d_path - * uses dcache_lock when generating path, so we should too. - * And finally d_compare is protected by dentry's d_lock, so - * here we go. - */ - if (inode) - mutex_lock(&inode->i_mutex); - spin_lock(&dcache_lock); - spin_lock(&newdent->d_lock); - memcpy((char *) newdent->d_name.name, qname.name, - newdent->d_name.len); - spin_unlock(&newdent->d_lock); - spin_unlock(&dcache_lock); - if (inode) - mutex_unlock(&inode->i_mutex); - } + dentry_update_name_case(newdent, &qname); } if (!newdent->d_inode) { @@ -650,7 +637,7 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, entry->ino = iunique(dir->i_sb, 2); inode = ncp_iget(dir->i_sb, entry); if (inode) { - newdent->d_op = &ncp_dentry_operations; + d_set_d_op(newdent, &ncp_dentry_operations); d_instantiate(newdent, inode); if (!hashed) d_rehash(newdent); @@ -658,7 +645,7 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, } else { struct inode *inode = newdent->d_inode; - mutex_lock(&inode->i_mutex); + mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); ncp_update_inode2(inode, entry); mutex_unlock(&inode->i_mutex); } @@ -906,7 +893,7 @@ static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struc if (inode) { ncp_new_dentry(dentry); add_entry: - dentry->d_op = &ncp_dentry_operations; + d_set_d_op(dentry, &ncp_dentry_operations); d_add(dentry, inode); error = 0; } diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c index 6c754f7..cb50aaf 100644 --- a/fs/ncpfs/file.c +++ b/fs/ncpfs/file.c @@ -17,7 +17,6 @@ #include <linux/mm.h> #include <linux/vmalloc.h> #include <linux/sched.h> -#include <linux/smp_lock.h> #include <linux/ncp_fs.h> #include "ncplib_kernel.h" diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c index 985fabb..9b39a5d 100644 --- a/fs/ncpfs/inode.c +++ b/fs/ncpfs/inode.c @@ -26,10 +26,10 @@ #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/init.h> -#include <linux/smp_lock.h> #include <linux/vfs.h> #include <linux/mount.h> #include <linux/seq_file.h> +#include <linux/namei.h> #include <linux/ncp_fs.h> @@ -59,11 +59,18 @@ static struct inode *ncp_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void ncp_destroy_inode(struct inode *inode) +static void ncp_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode)); } +static void ncp_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, ncp_i_callback); +} + static void init_once(void *foo) { struct ncp_inode_info *ei = (struct ncp_inode_info *) foo; @@ -310,7 +317,12 @@ static void ncp_stop_tasks(struct ncp_server *server) { sk->sk_write_space = server->write_space; release_sock(sk); del_timer_sync(&server->timeout_tm); - flush_scheduled_work(); + + flush_work_sync(&server->rcv.tq); + if (sk->sk_socket->type == SOCK_STREAM) + flush_work_sync(&server->tx.tq); + else + flush_work_sync(&server->timeout_tq); } static int ncp_show_options(struct seq_file *seq, struct vfsmount *mnt) @@ -711,7 +723,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) sb->s_root = d_alloc_root(root_inode); if (!sb->s_root) goto out_no_root; - sb->s_root->d_op = &ncp_root_dentry_operations; + d_set_d_op(sb->s_root, &ncp_root_dentry_operations); return 0; out_no_root: @@ -1020,16 +1032,16 @@ out: return result; } -static int ncp_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *ncp_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags, data, ncp_fill_super, mnt); + return mount_nodev(fs_type, flags, data, ncp_fill_super); } static struct file_system_type ncp_fs_type = { .owner = THIS_MODULE, .name = "ncpfs", - .get_sb = ncp_get_sb, + .mount = ncp_mount, .kill_sb = kill_anon_super, .fs_flags = FS_BINARY_MOUNTDATA, }; diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c index c2a1f9a..d40a547 100644 --- a/fs/ncpfs/ioctl.c +++ b/fs/ncpfs/ioctl.c @@ -17,7 +17,6 @@ #include <linux/mount.h> #include <linux/slab.h> #include <linux/highuid.h> -#include <linux/smp_lock.h> #include <linux/vmalloc.h> #include <linux/sched.h> diff --git a/fs/ncpfs/ncplib_kernel.h b/fs/ncpfs/ncplib_kernel.h index 3c57eca..1220df7 100644 --- a/fs/ncpfs/ncplib_kernel.h +++ b/fs/ncpfs/ncplib_kernel.h @@ -135,7 +135,7 @@ int ncp__vol2io(struct ncp_server *, unsigned char *, unsigned int *, const unsigned char *, unsigned int, int); #define NCP_ESC ':' -#define NCP_IO_TABLE(dentry) (NCP_SERVER((dentry)->d_inode)->nls_io) +#define NCP_IO_TABLE(sb) (NCP_SBP(sb)->nls_io) #define ncp_tolower(t, c) nls_tolower(t, c) #define ncp_toupper(t, c) nls_toupper(t, c) #define ncp_strnicmp(t, s1, s2, len) \ @@ -150,15 +150,15 @@ int ncp__io2vol(unsigned char *, unsigned int *, int ncp__vol2io(unsigned char *, unsigned int *, const unsigned char *, unsigned int, int); -#define NCP_IO_TABLE(dentry) NULL +#define NCP_IO_TABLE(sb) NULL #define ncp_tolower(t, c) tolower(c) #define ncp_toupper(t, c) toupper(c) #define ncp_io2vol(S,m,i,n,k,U) ncp__io2vol(m,i,n,k,U) #define ncp_vol2io(S,m,i,n,k,U) ncp__vol2io(m,i,n,k,U) -static inline int ncp_strnicmp(struct nls_table *t, const unsigned char *s1, - const unsigned char *s2, int len) +static inline int ncp_strnicmp(const struct nls_table *t, + const unsigned char *s1, const unsigned char *s2, int len) { while (len--) { if (tolower(*s1++) != tolower(*s2++)) @@ -193,7 +193,7 @@ ncp_renew_dentries(struct dentry *parent) struct list_head *next; struct dentry *dentry; - spin_lock(&dcache_lock); + spin_lock(&parent->d_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { dentry = list_entry(next, struct dentry, d_u.d_child); @@ -205,7 +205,7 @@ ncp_renew_dentries(struct dentry *parent) next = next->next; } - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); } static inline void @@ -215,7 +215,7 @@ ncp_invalidate_dircache_entries(struct dentry *parent) struct list_head *next; struct dentry *dentry; - spin_lock(&dcache_lock); + spin_lock(&parent->d_lock); next = parent->d_subdirs.next; while (next != &parent->d_subdirs) { dentry = list_entry(next, struct dentry, d_u.d_child); @@ -223,7 +223,7 @@ ncp_invalidate_dircache_entries(struct dentry *parent) ncp_age_dentry(server, dentry); next = next->next; } - spin_unlock(&dcache_lock); + spin_unlock(&parent->d_lock); } struct ncp_cache_head { diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index aeec017..1990165 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -9,7 +9,6 @@ #include <linux/completion.h> #include <linux/ip.h> #include <linux/module.h> -#include <linux/smp_lock.h> #include <linux/sunrpc/svc.h> #include <linux/sunrpc/svcsock.h> #include <linux/nfs_fs.h> @@ -17,9 +16,7 @@ #include <linux/freezer.h> #include <linux/kthread.h> #include <linux/sunrpc/svcauth_gss.h> -#if defined(CONFIG_NFS_V4_1) #include <linux/sunrpc/bc_xprt.h> -#endif #include <net/inet_sock.h> @@ -138,6 +135,33 @@ out_err: #if defined(CONFIG_NFS_V4_1) /* + * * CB_SEQUENCE operations will fail until the callback sessionid is set. + * */ +int nfs4_set_callback_sessionid(struct nfs_client *clp) +{ + struct svc_serv *serv = clp->cl_rpcclient->cl_xprt->bc_serv; + struct nfs4_sessionid *bc_sid; + + if (!serv->sv_bc_xprt) + return -EINVAL; + + /* on success freed in xprt_free */ + bc_sid = kmalloc(sizeof(struct nfs4_sessionid), GFP_KERNEL); + if (!bc_sid) + return -ENOMEM; + memcpy(bc_sid->data, &clp->cl_session->sess_id.data, + NFS4_MAX_SESSIONID_LEN); + spin_lock_bh(&serv->sv_cb_lock); + serv->sv_bc_xprt->xpt_bc_sid = bc_sid; + spin_unlock_bh(&serv->sv_cb_lock); + dprintk("%s set xpt_bc_sid=%u:%u:%u:%u for sv_bc_xprt %p\n", __func__, + ((u32 *)bc_sid->data)[0], ((u32 *)bc_sid->data)[1], + ((u32 *)bc_sid->data)[2], ((u32 *)bc_sid->data)[3], + serv->sv_bc_xprt); + return 0; +} + +/* * The callback service for NFSv4.1 callbacks */ static int @@ -178,30 +202,38 @@ nfs41_callback_svc(void *vrqstp) struct svc_rqst * nfs41_callback_up(struct svc_serv *serv, struct rpc_xprt *xprt) { - struct svc_xprt *bc_xprt; - struct svc_rqst *rqstp = ERR_PTR(-ENOMEM); + struct svc_rqst *rqstp; + int ret; - dprintk("--> %s\n", __func__); - /* Create a svc_sock for the service */ - bc_xprt = svc_sock_create(serv, xprt->prot); - if (!bc_xprt) + /* + * Create an svc_sock for the back channel service that shares the + * fore channel connection. + * Returns the input port (0) and sets the svc_serv bc_xprt on success + */ + ret = svc_create_xprt(serv, "tcp-bc", &init_net, PF_INET, 0, + SVC_SOCK_ANONYMOUS); + if (ret < 0) { + rqstp = ERR_PTR(ret); goto out; + } /* * Save the svc_serv in the transport so that it can * be referenced when the session backchannel is initialized */ - serv->bc_xprt = bc_xprt; xprt->bc_serv = serv; INIT_LIST_HEAD(&serv->sv_cb_list); spin_lock_init(&serv->sv_cb_lock); init_waitqueue_head(&serv->sv_cb_waitq); rqstp = svc_prepare_thread(serv, &serv->sv_pools[0]); - if (IS_ERR(rqstp)) - svc_sock_destroy(bc_xprt); + if (IS_ERR(rqstp)) { + svc_xprt_put(serv->sv_bc_xprt); + serv->sv_bc_xprt = NULL; + } out: - dprintk("--> %s return %p\n", __func__, rqstp); + dprintk("--> %s return %ld\n", __func__, + IS_ERR(rqstp) ? PTR_ERR(rqstp) : 0); return rqstp; } @@ -234,6 +266,10 @@ static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt, struct nfs_callback_data *cb_info) { } +int nfs4_set_callback_sessionid(struct nfs_client *clp) +{ + return 0; +} #endif /* CONFIG_NFS_V4_1 */ /* @@ -329,6 +365,9 @@ static int check_gss_callback_principal(struct nfs_client *clp, struct rpc_clnt *r = clp->cl_rpcclient; char *p = svc_gss_principal(rqstp); + /* No RPC_AUTH_GSS on NFSv4.1 back channel yet */ + if (clp->cl_minorversion != 0) + return SVC_DROP; /* * It might just be a normal user principal, in which case * userspace won't bother to tell us the name at all. @@ -346,6 +385,23 @@ static int check_gss_callback_principal(struct nfs_client *clp, return SVC_OK; } +/* pg_authenticate method helper */ +static struct nfs_client *nfs_cb_find_client(struct svc_rqst *rqstp) +{ + struct nfs4_sessionid *sessionid = bc_xprt_sid(rqstp); + int is_cb_compound = rqstp->rq_proc == CB_COMPOUND ? 1 : 0; + + dprintk("--> %s rq_proc %d\n", __func__, rqstp->rq_proc); + if (svc_is_backchannel(rqstp)) + /* Sessionid (usually) set after CB_NULL ping */ + return nfs4_find_client_sessionid(svc_addr(rqstp), sessionid, + is_cb_compound); + else + /* No callback identifier in pg_authenticate */ + return nfs4_find_client_no_ident(svc_addr(rqstp)); +} + +/* pg_authenticate method for nfsv4 callback threads. */ static int nfs_callback_authenticate(struct svc_rqst *rqstp) { struct nfs_client *clp; @@ -353,7 +409,7 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp) int ret = SVC_OK; /* Don't talk to strangers */ - clp = nfs_find_client(svc_addr(rqstp), 4); + clp = nfs_cb_find_client(rqstp); if (clp == NULL) return SVC_DROP; diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h index 85a7cfd..d3b44f9 100644 --- a/fs/nfs/callback.h +++ b/fs/nfs/callback.h @@ -34,10 +34,17 @@ enum nfs4_callback_opnum { OP_CB_ILLEGAL = 10044, }; +struct cb_process_state { + __be32 drc_status; + struct nfs_client *clp; + struct nfs4_sessionid *svc_sid; /* v4.1 callback service sessionid */ +}; + struct cb_compound_hdr_arg { unsigned int taglen; const char *tag; unsigned int minorversion; + unsigned int cb_ident; /* v4.0 callback identifier */ unsigned nops; }; @@ -103,14 +110,23 @@ struct cb_sequenceres { uint32_t csr_target_highestslotid; }; -extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args, - struct cb_sequenceres *res); +extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, + struct cb_sequenceres *res, + struct cb_process_state *cps); extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid); #define RCA4_TYPE_MASK_RDATA_DLG 0 #define RCA4_TYPE_MASK_WDATA_DLG 1 +#define RCA4_TYPE_MASK_DIR_DLG 2 +#define RCA4_TYPE_MASK_FILE_LAYOUT 3 +#define RCA4_TYPE_MASK_BLK_LAYOUT 4 +#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 +#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 +#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 +#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 +#define RCA4_TYPE_MASK_ALL 0xf31f struct cb_recallanyargs { struct sockaddr *craa_addr; @@ -118,25 +134,52 @@ struct cb_recallanyargs { uint32_t craa_type_mask; }; -extern unsigned nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy); +extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, + void *dummy, + struct cb_process_state *cps); struct cb_recallslotargs { struct sockaddr *crsa_addr; uint32_t crsa_target_max_slots; }; -extern unsigned nfs4_callback_recallslot(struct cb_recallslotargs *args, - void *dummy); +extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, + void *dummy, + struct cb_process_state *cps); + +struct cb_layoutrecallargs { + struct sockaddr *cbl_addr; + uint32_t cbl_recall_type; + uint32_t cbl_layout_type; + uint32_t cbl_layoutchanged; + union { + struct { + struct nfs_fh cbl_fh; + struct pnfs_layout_range cbl_range; + nfs4_stateid cbl_stateid; + }; + struct nfs_fsid cbl_fsid; + }; +}; -#endif /* CONFIG_NFS_V4_1 */ +extern unsigned nfs4_callback_layoutrecall( + struct cb_layoutrecallargs *args, + void *dummy, struct cb_process_state *cps); -extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res); -extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy); +extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses); +extern void nfs4_cb_take_slot(struct nfs_client *clp); +#endif /* CONFIG_NFS_V4_1 */ +extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, + struct cb_getattrres *res, + struct cb_process_state *cps); +extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, + struct cb_process_state *cps); #ifdef CONFIG_NFS_V4 extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); extern void nfs_callback_down(int minorversion); extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid); +extern int nfs4_set_callback_sessionid(struct nfs_client *clp); #endif /* CONFIG_NFS_V4 */ /* * nfs41: Callbacks are expected to not cause substantial latency, diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 2950fca..4bb91cb 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -12,30 +12,33 @@ #include "callback.h" #include "delegation.h" #include "internal.h" +#include "pnfs.h" #ifdef NFS_DEBUG #define NFSDBG_FACILITY NFSDBG_CALLBACK #endif - -__be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res) + +__be32 nfs4_callback_getattr(struct cb_getattrargs *args, + struct cb_getattrres *res, + struct cb_process_state *cps) { - struct nfs_client *clp; struct nfs_delegation *delegation; struct nfs_inode *nfsi; struct inode *inode; + res->status = htonl(NFS4ERR_OP_NOT_IN_SESSION); + if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ + goto out; + res->bitmap[0] = res->bitmap[1] = 0; res->status = htonl(NFS4ERR_BADHANDLE); - clp = nfs_find_client(args->addr, 4); - if (clp == NULL) - goto out; dprintk("NFS: GETATTR callback request from %s\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); - inode = nfs_delegation_find_inode(clp, &args->fh); + inode = nfs_delegation_find_inode(cps->clp, &args->fh); if (inode == NULL) - goto out_putclient; + goto out; nfsi = NFS_I(inode); rcu_read_lock(); delegation = rcu_dereference(nfsi->delegation); @@ -55,49 +58,41 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres * out_iput: rcu_read_unlock(); iput(inode); -out_putclient: - nfs_put_client(clp); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(res->status)); return res->status; } -__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy) +__be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, + struct cb_process_state *cps) { - struct nfs_client *clp; struct inode *inode; __be32 res; - res = htonl(NFS4ERR_BADHANDLE); - clp = nfs_find_client(args->addr, 4); - if (clp == NULL) + res = htonl(NFS4ERR_OP_NOT_IN_SESSION); + if (!cps->clp) /* Always set for v4.0. Set in cb_sequence for v4.1 */ goto out; dprintk("NFS: RECALL callback request from %s\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); - - do { - struct nfs_client *prev = clp; - - inode = nfs_delegation_find_inode(clp, &args->fh); - if (inode != NULL) { - /* Set up a helper thread to actually return the delegation */ - switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { - case 0: - res = 0; - break; - case -ENOENT: - if (res != 0) - res = htonl(NFS4ERR_BAD_STATEID); - break; - default: - res = htonl(NFS4ERR_RESOURCE); - } - iput(inode); - } - clp = nfs_find_client_next(prev); - nfs_put_client(prev); - } while (clp != NULL); + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + + res = htonl(NFS4ERR_BADHANDLE); + inode = nfs_delegation_find_inode(cps->clp, &args->fh); + if (inode == NULL) + goto out; + /* Set up a helper thread to actually return the delegation */ + switch (nfs_async_inode_return_delegation(inode, &args->stateid)) { + case 0: + res = 0; + break; + case -ENOENT: + if (res != 0) + res = htonl(NFS4ERR_BAD_STATEID); + break; + default: + res = htonl(NFS4ERR_RESOURCE); + } + iput(inode); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(res)); return res; @@ -113,6 +108,139 @@ int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, const nf #if defined(CONFIG_NFS_V4_1) +static u32 initiate_file_draining(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + struct pnfs_layout_hdr *lo; + struct inode *ino; + bool found = false; + u32 rv = NFS4ERR_NOMATCHING_LAYOUT; + LIST_HEAD(free_me_list); + + spin_lock(&clp->cl_lock); + list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { + if (nfs_compare_fh(&args->cbl_fh, + &NFS_I(lo->plh_inode)->fh)) + continue; + ino = igrab(lo->plh_inode); + if (!ino) + continue; + found = true; + /* Without this, layout can be freed as soon + * as we release cl_lock. + */ + get_layout_hdr(lo); + break; + } + spin_unlock(&clp->cl_lock); + if (!found) + return NFS4ERR_NOMATCHING_LAYOUT; + + spin_lock(&ino->i_lock); + if (test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || + mark_matching_lsegs_invalid(lo, &free_me_list, + args->cbl_range.iomode)) + rv = NFS4ERR_DELAY; + else + rv = NFS4ERR_NOMATCHING_LAYOUT; + pnfs_set_layout_stateid(lo, &args->cbl_stateid, true); + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&free_me_list); + put_layout_hdr(lo); + iput(ino); + return rv; +} + +static u32 initiate_bulk_draining(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + struct pnfs_layout_hdr *lo; + struct inode *ino; + u32 rv = NFS4ERR_NOMATCHING_LAYOUT; + struct pnfs_layout_hdr *tmp; + LIST_HEAD(recall_list); + LIST_HEAD(free_me_list); + struct pnfs_layout_range range = { + .iomode = IOMODE_ANY, + .offset = 0, + .length = NFS4_MAX_UINT64, + }; + + spin_lock(&clp->cl_lock); + list_for_each_entry(lo, &clp->cl_layouts, plh_layouts) { + if ((args->cbl_recall_type == RETURN_FSID) && + memcmp(&NFS_SERVER(lo->plh_inode)->fsid, + &args->cbl_fsid, sizeof(struct nfs_fsid))) + continue; + if (!igrab(lo->plh_inode)) + continue; + get_layout_hdr(lo); + BUG_ON(!list_empty(&lo->plh_bulk_recall)); + list_add(&lo->plh_bulk_recall, &recall_list); + } + spin_unlock(&clp->cl_lock); + list_for_each_entry_safe(lo, tmp, + &recall_list, plh_bulk_recall) { + ino = lo->plh_inode; + spin_lock(&ino->i_lock); + set_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); + if (mark_matching_lsegs_invalid(lo, &free_me_list, range.iomode)) + rv = NFS4ERR_DELAY; + list_del_init(&lo->plh_bulk_recall); + spin_unlock(&ino->i_lock); + put_layout_hdr(lo); + iput(ino); + } + pnfs_free_lseg_list(&free_me_list); + return rv; +} + +static u32 do_callback_layoutrecall(struct nfs_client *clp, + struct cb_layoutrecallargs *args) +{ + u32 res = NFS4ERR_DELAY; + + dprintk("%s enter, type=%i\n", __func__, args->cbl_recall_type); + if (test_and_set_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state)) + goto out; + if (args->cbl_recall_type == RETURN_FILE) + res = initiate_file_draining(clp, args); + else + res = initiate_bulk_draining(clp, args); + clear_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state); +out: + dprintk("%s returning %i\n", __func__, res); + return res; + +} + +__be32 nfs4_callback_layoutrecall(struct cb_layoutrecallargs *args, + void *dummy, struct cb_process_state *cps) +{ + u32 res; + + dprintk("%s: -->\n", __func__); + + if (cps->clp) + res = do_callback_layoutrecall(cps->clp, args); + else + res = NFS4ERR_OP_NOT_IN_SESSION; + + dprintk("%s: exit with status = %d\n", __func__, res); + return cpu_to_be32(res); +} + +static void pnfs_recall_all_layouts(struct nfs_client *clp) +{ + struct cb_layoutrecallargs args; + + /* Pretend we got a CB_LAYOUTRECALL(ALL) */ + memset(&args, 0, sizeof(args)); + args.cbl_recall_type = RETURN_ALL; + /* FIXME we ignore errors, what should we do? */ + do_callback_layoutrecall(clp, &args); +} + int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const nfs4_stateid *stateid) { if (delegation == NULL) @@ -185,42 +313,6 @@ validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args) } /* - * Returns a pointer to a held 'struct nfs_client' that matches the server's - * address, major version number, and session ID. It is the caller's - * responsibility to release the returned reference. - * - * Returns NULL if there are no connections with sessions, or if no session - * matches the one of interest. - */ - static struct nfs_client *find_client_with_session( - const struct sockaddr *addr, u32 nfsversion, - struct nfs4_sessionid *sessionid) -{ - struct nfs_client *clp; - - clp = nfs_find_client(addr, 4); - if (clp == NULL) - return NULL; - - do { - struct nfs_client *prev = clp; - - if (clp->cl_session != NULL) { - if (memcmp(clp->cl_session->sess_id.data, - sessionid->data, - NFS4_MAX_SESSIONID_LEN) == 0) { - /* Returns a held reference to clp */ - return clp; - } - } - clp = nfs_find_client_next(prev); - nfs_put_client(prev); - } while (clp != NULL); - - return NULL; -} - -/* * For each referring call triple, check the session's slot table for * a match. If the slot is in use and the sequence numbers match, the * client is still waiting for a response to the original request. @@ -276,20 +368,34 @@ out: } __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, - struct cb_sequenceres *res) + struct cb_sequenceres *res, + struct cb_process_state *cps) { struct nfs_client *clp; int i; __be32 status; + cps->clp = NULL; + status = htonl(NFS4ERR_BADSESSION); - clp = find_client_with_session(args->csa_addr, 4, &args->csa_sessionid); + /* Incoming session must match the callback session */ + if (memcmp(&args->csa_sessionid, cps->svc_sid, NFS4_MAX_SESSIONID_LEN)) + goto out; + + clp = nfs4_find_client_sessionid(args->csa_addr, + &args->csa_sessionid, 1); if (clp == NULL) goto out; + /* state manager is resetting the session */ + if (test_bit(NFS4_SESSION_DRAINING, &clp->cl_session->session_state)) { + status = NFS4ERR_DELAY; + goto out; + } + status = validate_seqid(&clp->cl_session->bc_slot_table, args); if (status) - goto out_putclient; + goto out; /* * Check for pending referring calls. If a match is found, a @@ -298,7 +404,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, */ if (referring_call_exists(clp, args->csa_nrclists, args->csa_rclists)) { status = htonl(NFS4ERR_DELAY); - goto out_putclient; + goto out; } memcpy(&res->csr_sessionid, &args->csa_sessionid, @@ -307,83 +413,93 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, res->csr_slotid = args->csa_slotid; res->csr_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; res->csr_target_highestslotid = NFS41_BC_MAX_CALLBACKS - 1; + nfs4_cb_take_slot(clp); + cps->clp = clp; /* put in nfs4_callback_compound */ -out_putclient: - nfs_put_client(clp); out: for (i = 0; i < args->csa_nrclists; i++) kfree(args->csa_rclists[i].rcl_refcalls); kfree(args->csa_rclists); - if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) - res->csr_status = 0; - else + if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { + cps->drc_status = status; + status = 0; + } else res->csr_status = status; + dprintk("%s: exit with status = %d res->csr_status %d\n", __func__, ntohl(status), ntohl(res->csr_status)); return status; } -__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy) +static bool +validate_bitmap_values(unsigned long mask) +{ + return (mask & ~RCA4_TYPE_MASK_ALL) == 0; +} + +__be32 nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy, + struct cb_process_state *cps) { - struct nfs_client *clp; __be32 status; fmode_t flags = 0; - status = htonl(NFS4ERR_OP_NOT_IN_SESSION); - clp = nfs_find_client(args->craa_addr, 4); - if (clp == NULL) + status = cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION); + if (!cps->clp) /* set in cb_sequence */ goto out; dprintk("NFS: RECALL_ANY callback request from %s\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR)); + + status = cpu_to_be32(NFS4ERR_INVAL); + if (!validate_bitmap_values(args->craa_type_mask)) + goto out; + status = cpu_to_be32(NFS4_OK); if (test_bit(RCA4_TYPE_MASK_RDATA_DLG, (const unsigned long *) &args->craa_type_mask)) flags = FMODE_READ; if (test_bit(RCA4_TYPE_MASK_WDATA_DLG, (const unsigned long *) &args->craa_type_mask)) flags |= FMODE_WRITE; - + if (test_bit(RCA4_TYPE_MASK_FILE_LAYOUT, (const unsigned long *) + &args->craa_type_mask)) + pnfs_recall_all_layouts(cps->clp); if (flags) - nfs_expire_all_delegation_types(clp, flags); - status = htonl(NFS4_OK); + nfs_expire_all_delegation_types(cps->clp, flags); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); return status; } /* Reduce the fore channel's max_slots to the target value */ -__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy) +__be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy, + struct cb_process_state *cps) { - struct nfs_client *clp; struct nfs4_slot_table *fc_tbl; __be32 status; status = htonl(NFS4ERR_OP_NOT_IN_SESSION); - clp = nfs_find_client(args->crsa_addr, 4); - if (clp == NULL) + if (!cps->clp) /* set in cb_sequence */ goto out; dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n", - rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), + rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR), args->crsa_target_max_slots); - fc_tbl = &clp->cl_session->fc_slot_table; + fc_tbl = &cps->clp->cl_session->fc_slot_table; status = htonl(NFS4ERR_BAD_HIGH_SLOT); if (args->crsa_target_max_slots > fc_tbl->max_slots || args->crsa_target_max_slots < 1) - goto out_putclient; + goto out; status = htonl(NFS4_OK); if (args->crsa_target_max_slots == fc_tbl->max_slots) - goto out_putclient; + goto out; fc_tbl->target_max_slots = args->crsa_target_max_slots; - nfs41_handle_recall_slot(clp); -out_putclient: - nfs_put_client(clp); /* balance nfs_find_client */ + nfs41_handle_recall_slot(cps->clp); out: dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); return status; diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index 05af212..23112c2 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -10,8 +10,10 @@ #include <linux/nfs4.h> #include <linux/nfs_fs.h> #include <linux/slab.h> +#include <linux/sunrpc/bc_xprt.h> #include "nfs4_fs.h" #include "callback.h" +#include "internal.h" #define CB_OP_TAGLEN_MAXSZ (512) #define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ) @@ -22,6 +24,7 @@ #define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) #if defined(CONFIG_NFS_V4_1) +#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) #define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 4 + 1 + 3) #define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) @@ -33,7 +36,8 @@ /* Internal error code */ #define NFS4ERR_RESOURCE_HDR 11050 -typedef __be32 (*callback_process_op_t)(void *, void *); +typedef __be32 (*callback_process_op_t)(void *, void *, + struct cb_process_state *); typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *); typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *); @@ -160,7 +164,7 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound hdr->minorversion = ntohl(*p++); /* Check minor version is zero or one. */ if (hdr->minorversion <= 1) { - p++; /* skip callback_ident */ + hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */ } else { printk(KERN_WARNING "%s: NFSv4 server callback with " "illegal minor version %u!\n", @@ -220,6 +224,66 @@ out: #if defined(CONFIG_NFS_V4_1) +static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp, + struct xdr_stream *xdr, + struct cb_layoutrecallargs *args) +{ + __be32 *p; + __be32 status = 0; + uint32_t iomode; + + args->cbl_addr = svc_addr(rqstp); + p = read_buf(xdr, 4 * sizeof(uint32_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + + args->cbl_layout_type = ntohl(*p++); + /* Depite the spec's xdr, iomode really belongs in the FILE switch, + * as it is unuseable and ignored with the other types. + */ + iomode = ntohl(*p++); + args->cbl_layoutchanged = ntohl(*p++); + args->cbl_recall_type = ntohl(*p++); + + if (args->cbl_recall_type == RETURN_FILE) { + args->cbl_range.iomode = iomode; + status = decode_fh(xdr, &args->cbl_fh); + if (unlikely(status != 0)) + goto out; + + p = read_buf(xdr, 2 * sizeof(uint64_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + p = xdr_decode_hyper(p, &args->cbl_range.offset); + p = xdr_decode_hyper(p, &args->cbl_range.length); + status = decode_stateid(xdr, &args->cbl_stateid); + if (unlikely(status != 0)) + goto out; + } else if (args->cbl_recall_type == RETURN_FSID) { + p = read_buf(xdr, 2 * sizeof(uint64_t)); + if (unlikely(p == NULL)) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + p = xdr_decode_hyper(p, &args->cbl_fsid.major); + p = xdr_decode_hyper(p, &args->cbl_fsid.minor); + } else if (args->cbl_recall_type != RETURN_ALL) { + status = htonl(NFS4ERR_BADXDR); + goto out; + } + dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n", + __func__, + args->cbl_layout_type, iomode, + args->cbl_layoutchanged, args->cbl_recall_type); +out: + dprintk("%s: exit with status = %d\n", __func__, ntohl(status)); + return status; +} + static __be32 decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid) { @@ -574,10 +638,10 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) case OP_CB_SEQUENCE: case OP_CB_RECALL_ANY: case OP_CB_RECALL_SLOT: + case OP_CB_LAYOUTRECALL: *op = &callback_ops[op_nr]; break; - case OP_CB_LAYOUTRECALL: case OP_CB_NOTIFY_DEVICEID: case OP_CB_NOTIFY: case OP_CB_PUSH_DELEG: @@ -593,6 +657,37 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) return htonl(NFS_OK); } +static void nfs4_callback_free_slot(struct nfs4_session *session) +{ + struct nfs4_slot_table *tbl = &session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); + /* + * Let the state manager know callback processing done. + * A single slot, so highest used slotid is either 0 or -1 + */ + tbl->highest_used_slotid--; + nfs4_check_drain_bc_complete(session); + spin_unlock(&tbl->slot_tbl_lock); +} + +static void nfs4_cb_free_slot(struct nfs_client *clp) +{ + if (clp && clp->cl_session) + nfs4_callback_free_slot(clp->cl_session); +} + +/* A single slot, so highest used slotid is either 0 or -1 */ +void nfs4_cb_take_slot(struct nfs_client *clp) +{ + struct nfs4_slot_table *tbl = &clp->cl_session->bc_slot_table; + + spin_lock(&tbl->slot_tbl_lock); + tbl->highest_used_slotid++; + BUG_ON(tbl->highest_used_slotid != 0); + spin_unlock(&tbl->slot_tbl_lock); +} + #else /* CONFIG_NFS_V4_1 */ static __be32 @@ -601,6 +696,9 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } +static void nfs4_cb_free_slot(struct nfs_client *clp) +{ +} #endif /* CONFIG_NFS_V4_1 */ static __be32 @@ -621,7 +719,8 @@ preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op) static __be32 process_op(uint32_t minorversion, int nop, struct svc_rqst *rqstp, struct xdr_stream *xdr_in, void *argp, - struct xdr_stream *xdr_out, void *resp, int* drc_status) + struct xdr_stream *xdr_out, void *resp, + struct cb_process_state *cps) { struct callback_op *op = &callback_ops[0]; unsigned int op_nr; @@ -644,8 +743,8 @@ static __be32 process_op(uint32_t minorversion, int nop, if (status) goto encode_hdr; - if (*drc_status) { - status = *drc_status; + if (cps->drc_status) { + status = cps->drc_status; goto encode_hdr; } @@ -653,16 +752,10 @@ static __be32 process_op(uint32_t minorversion, int nop, if (maxlen > 0 && maxlen < PAGE_SIZE) { status = op->decode_args(rqstp, xdr_in, argp); if (likely(status == 0)) - status = op->process_op(argp, resp); + status = op->process_op(argp, resp, cps); } else status = htonl(NFS4ERR_RESOURCE); - /* Only set by OP_CB_SEQUENCE processing */ - if (status == htonl(NFS4ERR_RETRY_UNCACHED_REP)) { - *drc_status = status; - status = 0; - } - encode_hdr: res = encode_op_hdr(xdr_out, op_nr, status); if (unlikely(res)) @@ -681,8 +774,11 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r struct cb_compound_hdr_arg hdr_arg = { 0 }; struct cb_compound_hdr_res hdr_res = { NULL }; struct xdr_stream xdr_in, xdr_out; - __be32 *p; - __be32 status, drc_status = 0; + __be32 *p, status; + struct cb_process_state cps = { + .drc_status = 0, + .clp = NULL, + }; unsigned int nops = 0; dprintk("%s: start\n", __func__); @@ -696,6 +792,13 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r if (status == __constant_htonl(NFS4ERR_RESOURCE)) return rpc_garbage_args; + if (hdr_arg.minorversion == 0) { + cps.clp = nfs4_find_client_ident(hdr_arg.cb_ident); + if (!cps.clp) + return rpc_drop_reply; + } else + cps.svc_sid = bc_xprt_sid(rqstp); + hdr_res.taglen = hdr_arg.taglen; hdr_res.tag = hdr_arg.tag; if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) @@ -703,7 +806,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r while (status == 0 && nops != hdr_arg.nops) { status = process_op(hdr_arg.minorversion, nops, rqstp, - &xdr_in, argp, &xdr_out, resp, &drc_status); + &xdr_in, argp, &xdr_out, resp, &cps); nops++; } @@ -716,6 +819,8 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r *hdr_res.status = status; *hdr_res.nops = htonl(nops); + nfs4_cb_free_slot(cps.clp); + nfs_put_client(cps.clp); dprintk("%s: done, status = %u\n", __func__, ntohl(status)); return rpc_success; } @@ -739,6 +844,12 @@ static struct callback_op callback_ops[] = { .res_maxsize = CB_OP_RECALL_RES_MAXSZ, }, #if defined(CONFIG_NFS_V4_1) + [OP_CB_LAYOUTRECALL] = { + .process_op = (callback_process_op_t)nfs4_callback_layoutrecall, + .decode_args = + (callback_decode_arg_t)decode_layoutrecall_args, + .res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ, + }, [OP_CB_SEQUENCE] = { .process_op = (callback_process_op_t)nfs4_callback_sequence, .decode_args = (callback_decode_arg_t)decode_cb_sequence_args, diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 0870d0d..192f2f8 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -56,6 +56,30 @@ static DEFINE_SPINLOCK(nfs_client_lock); static LIST_HEAD(nfs_client_list); static LIST_HEAD(nfs_volume_list); static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq); +#ifdef CONFIG_NFS_V4 +static DEFINE_IDR(cb_ident_idr); /* Protected by nfs_client_lock */ + +/* + * Get a unique NFSv4.0 callback identifier which will be used + * by the V4.0 callback service to lookup the nfs_client struct + */ +static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) +{ + int ret = 0; + + if (clp->rpc_ops->version != 4 || minorversion != 0) + return ret; +retry: + if (!idr_pre_get(&cb_ident_idr, GFP_KERNEL)) + return -ENOMEM; + spin_lock(&nfs_client_lock); + ret = idr_get_new(&cb_ident_idr, clp, &clp->cl_cb_ident); + spin_unlock(&nfs_client_lock); + if (ret == -EAGAIN) + goto retry; + return ret; +} +#endif /* CONFIG_NFS_V4 */ /* * RPC cruft for NFS @@ -144,7 +168,10 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_ clp->cl_proto = cl_init->proto; #ifdef CONFIG_NFS_V4 - INIT_LIST_HEAD(&clp->cl_delegations); + err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); + if (err) + goto error_cleanup; + spin_lock_init(&clp->cl_lock); INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); @@ -170,21 +197,17 @@ error_0: } #ifdef CONFIG_NFS_V4 -/* - * Clears/puts all minor version specific parts from an nfs_client struct - * reverting it to minorversion 0. - */ -static void nfs4_clear_client_minor_version(struct nfs_client *clp) -{ #ifdef CONFIG_NFS_V4_1 - if (nfs4_has_session(clp)) { +static void nfs4_shutdown_session(struct nfs_client *clp) +{ + if (nfs4_has_session(clp)) nfs4_destroy_session(clp->cl_session); - clp->cl_session = NULL; - } - - clp->cl_mvops = nfs_v4_minor_ops[0]; -#endif /* CONFIG_NFS_V4_1 */ } +#else /* CONFIG_NFS_V4_1 */ +static void nfs4_shutdown_session(struct nfs_client *clp) +{ +} +#endif /* CONFIG_NFS_V4_1 */ /* * Destroy the NFS4 callback service @@ -199,17 +222,49 @@ static void nfs4_shutdown_client(struct nfs_client *clp) { if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) nfs4_kill_renewd(clp); - nfs4_clear_client_minor_version(clp); + nfs4_shutdown_session(clp); nfs4_destroy_callback(clp); if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) nfs_idmap_delete(clp); rpc_destroy_wait_queue(&clp->cl_rpcwaitq); } + +/* idr_remove_all is not needed as all id's are removed by nfs_put_client */ +void nfs_cleanup_cb_ident_idr(void) +{ + idr_destroy(&cb_ident_idr); +} + +/* nfs_client_lock held */ +static void nfs_cb_idr_remove_locked(struct nfs_client *clp) +{ + if (clp->cl_cb_ident) + idr_remove(&cb_ident_idr, clp->cl_cb_ident); +} + +static void pnfs_init_server(struct nfs_server *server) +{ + rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC"); +} + #else static void nfs4_shutdown_client(struct nfs_client *clp) { } + +void nfs_cleanup_cb_ident_idr(void) +{ +} + +static void nfs_cb_idr_remove_locked(struct nfs_client *clp) +{ +} + +static void pnfs_init_server(struct nfs_server *server) +{ +} + #endif /* CONFIG_NFS_V4 */ /* @@ -248,6 +303,7 @@ void nfs_put_client(struct nfs_client *clp) if (atomic_dec_and_lock(&clp->cl_count, &nfs_client_lock)) { list_del(&clp->cl_share_link); + nfs_cb_idr_remove_locked(clp); spin_unlock(&nfs_client_lock); BUG_ON(!list_empty(&clp->cl_superblocks)); @@ -363,70 +419,28 @@ static int nfs_sockaddr_cmp(const struct sockaddr *sa1, return 0; } -/* - * Find a client by IP address and protocol version - * - returns NULL if no such client - */ -struct nfs_client *nfs_find_client(const struct sockaddr *addr, u32 nfsversion) -{ - struct nfs_client *clp; - - spin_lock(&nfs_client_lock); - list_for_each_entry(clp, &nfs_client_list, cl_share_link) { - struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; - - /* Don't match clients that failed to initialise properly */ - if (!(clp->cl_cons_state == NFS_CS_READY || - clp->cl_cons_state == NFS_CS_SESSION_INITING)) - continue; - - /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops->version != nfsversion) - continue; - - /* Match only the IP address, not the port number */ - if (!nfs_sockaddr_match_ipaddr(addr, clap)) - continue; - - atomic_inc(&clp->cl_count); - spin_unlock(&nfs_client_lock); - return clp; - } - spin_unlock(&nfs_client_lock); - return NULL; -} - -/* - * Find a client by IP address and protocol version - * - returns NULL if no such client - */ -struct nfs_client *nfs_find_client_next(struct nfs_client *clp) +/* Common match routine for v4.0 and v4.1 callback services */ +bool +nfs4_cb_match_client(const struct sockaddr *addr, struct nfs_client *clp, + u32 minorversion) { - struct sockaddr *sap = (struct sockaddr *)&clp->cl_addr; - u32 nfsvers = clp->rpc_ops->version; + struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; - spin_lock(&nfs_client_lock); - list_for_each_entry_continue(clp, &nfs_client_list, cl_share_link) { - struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; + /* Don't match clients that failed to initialise */ + if (!(clp->cl_cons_state == NFS_CS_READY || + clp->cl_cons_state == NFS_CS_SESSION_INITING)) + return false; - /* Don't match clients that failed to initialise properly */ - if (clp->cl_cons_state != NFS_CS_READY) - continue; + /* Match the version and minorversion */ + if (clp->rpc_ops->version != 4 || + clp->cl_minorversion != minorversion) + return false; - /* Different NFS versions cannot share the same nfs_client */ - if (clp->rpc_ops->version != nfsvers) - continue; + /* Match only the IP address, not the port number */ + if (!nfs_sockaddr_match_ipaddr(addr, clap)) + return false; - /* Match only the IP address, not the port number */ - if (!nfs_sockaddr_match_ipaddr(sap, clap)) - continue; - - atomic_inc(&clp->cl_count); - spin_unlock(&nfs_client_lock); - return clp; - } - spin_unlock(&nfs_client_lock); - return NULL; + return true; } /* @@ -988,6 +1002,27 @@ static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_serve target->options = source->options; } +static void nfs_server_insert_lists(struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + + spin_lock(&nfs_client_lock); + list_add_tail_rcu(&server->client_link, &clp->cl_superblocks); + list_add_tail(&server->master_link, &nfs_volume_list); + spin_unlock(&nfs_client_lock); + +} + +static void nfs_server_remove_lists(struct nfs_server *server) +{ + spin_lock(&nfs_client_lock); + list_del_rcu(&server->client_link); + list_del(&server->master_link); + spin_unlock(&nfs_client_lock); + + synchronize_rcu(); +} + /* * Allocate and initialise a server record */ @@ -1004,6 +1039,7 @@ static struct nfs_server *nfs_alloc_server(void) /* Zero out the NFS state stuff */ INIT_LIST_HEAD(&server->client_link); INIT_LIST_HEAD(&server->master_link); + INIT_LIST_HEAD(&server->delegations); atomic_set(&server->active, 0); @@ -1019,6 +1055,8 @@ static struct nfs_server *nfs_alloc_server(void) return NULL; } + pnfs_init_server(server); + return server; } @@ -1029,11 +1067,8 @@ void nfs_free_server(struct nfs_server *server) { dprintk("--> nfs_free_server()\n"); + nfs_server_remove_lists(server); unset_pnfs_layoutdriver(server); - spin_lock(&nfs_client_lock); - list_del(&server->client_link); - list_del(&server->master_link); - spin_unlock(&nfs_client_lock); if (server->destroy != NULL) server->destroy(server); @@ -1108,11 +1143,7 @@ struct nfs_server *nfs_create_server(const struct nfs_parsed_mount_data *data, (unsigned long long) server->fsid.major, (unsigned long long) server->fsid.minor); - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; nfs_free_fattr(fattr); return server; @@ -1125,6 +1156,101 @@ error: #ifdef CONFIG_NFS_V4 /* + * NFSv4.0 callback thread helper + * + * Find a client by IP address, protocol version, and minorversion + * + * Called from the pg_authenticate method. The callback identifier + * is not used as it has not been decoded. + * + * Returns NULL if no such client + */ +struct nfs_client * +nfs4_find_client_no_ident(const struct sockaddr *addr) +{ + struct nfs_client *clp; + + spin_lock(&nfs_client_lock); + list_for_each_entry(clp, &nfs_client_list, cl_share_link) { + if (nfs4_cb_match_client(addr, clp, 0) == false) + continue; + atomic_inc(&clp->cl_count); + spin_unlock(&nfs_client_lock); + return clp; + } + spin_unlock(&nfs_client_lock); + return NULL; +} + +/* + * NFSv4.0 callback thread helper + * + * Find a client by callback identifier + */ +struct nfs_client * +nfs4_find_client_ident(int cb_ident) +{ + struct nfs_client *clp; + + spin_lock(&nfs_client_lock); + clp = idr_find(&cb_ident_idr, cb_ident); + if (clp) + atomic_inc(&clp->cl_count); + spin_unlock(&nfs_client_lock); + return clp; +} + +#if defined(CONFIG_NFS_V4_1) +/* + * NFSv4.1 callback thread helper + * For CB_COMPOUND calls, find a client by IP address, protocol version, + * minorversion, and sessionID + * + * CREATE_SESSION triggers a CB_NULL ping from servers. The callback service + * sessionid can only be set after the CREATE_SESSION return, so a CB_NULL + * can arrive before the callback sessionid is set. For CB_NULL calls, + * find a client by IP address protocol version, and minorversion. + * + * Returns NULL if no such client + */ +struct nfs_client * +nfs4_find_client_sessionid(const struct sockaddr *addr, + struct nfs4_sessionid *sid, int is_cb_compound) +{ + struct nfs_client *clp; + + spin_lock(&nfs_client_lock); + list_for_each_entry(clp, &nfs_client_list, cl_share_link) { + if (nfs4_cb_match_client(addr, clp, 1) == false) + continue; + + if (!nfs4_has_session(clp)) + continue; + + /* Match sessionid unless cb_null call*/ + if (is_cb_compound && (memcmp(clp->cl_session->sess_id.data, + sid->data, NFS4_MAX_SESSIONID_LEN) != 0)) + continue; + + atomic_inc(&clp->cl_count); + spin_unlock(&nfs_client_lock); + return clp; + } + spin_unlock(&nfs_client_lock); + return NULL; +} + +#else /* CONFIG_NFS_V4_1 */ + +struct nfs_client * +nfs4_find_client_sessionid(const struct sockaddr *addr, + struct nfs4_sessionid *sid, int is_cb_compound) +{ + return NULL; +} +#endif /* CONFIG_NFS_V4_1 */ + +/* * Initialize the NFS4 callback service */ static int nfs4_init_callback(struct nfs_client *clp) @@ -1342,11 +1468,7 @@ static int nfs4_server_common_setup(struct nfs_server *server, if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) server->namelen = NFS4_MAXNAMLEN; - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; out: nfs_free_fattr(fattr); @@ -1551,11 +1673,7 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source, if (error < 0) goto out_free_server; - spin_lock(&nfs_client_lock); - list_add_tail(&server->client_link, &server->nfs_client->cl_superblocks); - list_add_tail(&server->master_link, &nfs_volume_list); - spin_unlock(&nfs_client_lock); - + nfs_server_insert_lists(server); server->mount_time = jiffies; nfs_free_fattr(fattr_fsinfo); diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 232a7ee..364e432 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -11,7 +11,6 @@ #include <linux/module.h> #include <linux/sched.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/spinlock.h> #include <linux/nfs4.h> @@ -41,11 +40,23 @@ static void nfs_free_delegation(struct nfs_delegation *delegation) call_rcu(&delegation->rcu, nfs_free_delegation_callback); } +/** + * nfs_mark_delegation_referenced - set delegation's REFERENCED flag + * @delegation: delegation to process + * + */ void nfs_mark_delegation_referenced(struct nfs_delegation *delegation) { set_bit(NFS_DELEGATION_REFERENCED, &delegation->flags); } +/** + * nfs_have_delegation - check if inode has a delegation + * @inode: inode to check + * @flags: delegation types to check for + * + * Returns one if inode has the indicated delegation, otherwise zero. + */ int nfs_have_delegation(struct inode *inode, fmode_t flags) { struct nfs_delegation *delegation; @@ -120,10 +131,15 @@ again: return 0; } -/* - * Set up a delegation on an inode +/** + * nfs_inode_reclaim_delegation - process a delegation reclaim request + * @inode: inode to process + * @cred: credential to use for request + * @res: new delegation state from server + * */ -void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res) +void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred, + struct nfs_openres *res) { struct nfs_delegation *delegation; struct rpc_cred *oldcred = NULL; @@ -176,38 +192,52 @@ static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation return inode; } -static struct nfs_delegation *nfs_detach_delegation_locked(struct nfs_inode *nfsi, - const nfs4_stateid *stateid, - struct nfs_client *clp) +static struct nfs_delegation * +nfs_detach_delegation_locked(struct nfs_inode *nfsi, + struct nfs_server *server) { struct nfs_delegation *delegation = rcu_dereference_protected(nfsi->delegation, - lockdep_is_held(&clp->cl_lock)); + lockdep_is_held(&server->nfs_client->cl_lock)); if (delegation == NULL) goto nomatch; + spin_lock(&delegation->lock); - if (stateid != NULL && memcmp(delegation->stateid.data, stateid->data, - sizeof(delegation->stateid.data)) != 0) - goto nomatch_unlock; list_del_rcu(&delegation->super_list); delegation->inode = NULL; nfsi->delegation_state = 0; rcu_assign_pointer(nfsi->delegation, NULL); spin_unlock(&delegation->lock); return delegation; -nomatch_unlock: - spin_unlock(&delegation->lock); nomatch: return NULL; } -/* - * Set up a delegation on an inode +static struct nfs_delegation *nfs_detach_delegation(struct nfs_inode *nfsi, + struct nfs_server *server) +{ + struct nfs_client *clp = server->nfs_client; + struct nfs_delegation *delegation; + + spin_lock(&clp->cl_lock); + delegation = nfs_detach_delegation_locked(nfsi, server); + spin_unlock(&clp->cl_lock); + return delegation; +} + +/** + * nfs_inode_set_delegation - set up a delegation on an inode + * @inode: inode to which delegation applies + * @cred: cred to use for subsequent delegation processing + * @res: new delegation state from server + * + * Returns zero on success, or a negative errno value. */ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct nfs_openres *res) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_client *clp = server->nfs_client; struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation, *old_delegation; struct nfs_delegation *freeme = NULL; @@ -228,7 +258,7 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct spin_lock(&clp->cl_lock); old_delegation = rcu_dereference_protected(nfsi->delegation, - lockdep_is_held(&clp->cl_lock)); + lockdep_is_held(&clp->cl_lock)); if (old_delegation != NULL) { if (memcmp(&delegation->stateid, &old_delegation->stateid, sizeof(old_delegation->stateid)) == 0 && @@ -247,9 +277,9 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct delegation = NULL; goto out; } - freeme = nfs_detach_delegation_locked(nfsi, NULL, clp); + freeme = nfs_detach_delegation_locked(nfsi, server); } - list_add_rcu(&delegation->super_list, &clp->cl_delegations); + list_add_rcu(&delegation->super_list, &server->delegations); nfsi->delegation_state = delegation->type; rcu_assign_pointer(nfsi->delegation, delegation); delegation = NULL; @@ -291,73 +321,85 @@ out: return err; } -/* - * Return all delegations that have been marked for return +/** + * nfs_client_return_marked_delegations - return previously marked delegations + * @clp: nfs_client to process + * + * Returns zero on success, or a negative errno value. */ int nfs_client_return_marked_delegations(struct nfs_client *clp) { struct nfs_delegation *delegation; + struct nfs_server *server; struct inode *inode; int err = 0; restart: rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { - if (!test_and_clear_bit(NFS_DELEGATION_RETURN, &delegation->flags)) - continue; - inode = nfs_delegation_grab_inode(delegation); - if (inode == NULL) - continue; - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp); - spin_unlock(&clp->cl_lock); - rcu_read_unlock(); - if (delegation != NULL) { - filemap_flush(inode->i_mapping); - err = __nfs_inode_return_delegation(inode, delegation, 0); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + list_for_each_entry_rcu(delegation, &server->delegations, + super_list) { + if (!test_and_clear_bit(NFS_DELEGATION_RETURN, + &delegation->flags)) + continue; + inode = nfs_delegation_grab_inode(delegation); + if (inode == NULL) + continue; + delegation = nfs_detach_delegation(NFS_I(inode), + server); + rcu_read_unlock(); + + if (delegation != NULL) { + filemap_flush(inode->i_mapping); + err = __nfs_inode_return_delegation(inode, + delegation, 0); + } + iput(inode); + if (!err) + goto restart; + set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); + return err; } - iput(inode); - if (!err) - goto restart; - set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); - return err; } rcu_read_unlock(); return 0; } -/* - * This function returns the delegation without reclaiming opens - * or protecting against delegation reclaims. - * It is therefore really only safe to be called from - * nfs4_clear_inode() +/** + * nfs_inode_return_delegation_noreclaim - return delegation, don't reclaim opens + * @inode: inode to process + * + * Does not protect against delegation reclaims, therefore really only safe + * to be called from nfs4_clear_inode(). */ void nfs_inode_return_delegation_noreclaim(struct inode *inode) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_server *server = NFS_SERVER(inode); struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; if (rcu_access_pointer(nfsi->delegation) != NULL) { - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(nfsi, NULL, clp); - spin_unlock(&clp->cl_lock); + delegation = nfs_detach_delegation(nfsi, server); if (delegation != NULL) nfs_do_return_delegation(inode, delegation, 0); } } +/** + * nfs_inode_return_delegation - synchronously return a delegation + * @inode: inode to process + * + * Returns zero on success, or a negative errno value. + */ int nfs_inode_return_delegation(struct inode *inode) { - struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; + struct nfs_server *server = NFS_SERVER(inode); struct nfs_inode *nfsi = NFS_I(inode); struct nfs_delegation *delegation; int err = 0; if (rcu_access_pointer(nfsi->delegation) != NULL) { - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(nfsi, NULL, clp); - spin_unlock(&clp->cl_lock); + delegation = nfs_detach_delegation(nfsi, server); if (delegation != NULL) { nfs_wb_all(inode); err = __nfs_inode_return_delegation(inode, delegation, 1); @@ -366,46 +408,61 @@ int nfs_inode_return_delegation(struct inode *inode) return err; } -static void nfs_mark_return_delegation(struct nfs_client *clp, struct nfs_delegation *delegation) +static void nfs_mark_return_delegation(struct nfs_delegation *delegation) { + struct nfs_client *clp = NFS_SERVER(delegation->inode)->nfs_client; + set_bit(NFS_DELEGATION_RETURN, &delegation->flags); set_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state); } -/* - * Return all delegations associated to a super block +/** + * nfs_super_return_all_delegations - return delegations for one superblock + * @sb: sb to process + * */ void nfs_super_return_all_delegations(struct super_block *sb) { - struct nfs_client *clp = NFS_SB(sb)->nfs_client; + struct nfs_server *server = NFS_SB(sb); + struct nfs_client *clp = server->nfs_client; struct nfs_delegation *delegation; if (clp == NULL) return; + rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { spin_lock(&delegation->lock); - if (delegation->inode != NULL && delegation->inode->i_sb == sb) - set_bit(NFS_DELEGATION_RETURN, &delegation->flags); + set_bit(NFS_DELEGATION_RETURN, &delegation->flags); spin_unlock(&delegation->lock); } rcu_read_unlock(); + if (nfs_client_return_marked_delegations(clp) != 0) nfs4_schedule_state_manager(clp); } -static -void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp, fmode_t flags) +static void nfs_mark_return_all_delegation_types(struct nfs_server *server, + fmode_t flags) { struct nfs_delegation *delegation; - rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { if ((delegation->type == (FMODE_READ|FMODE_WRITE)) && !(flags & FMODE_WRITE)) continue; if (delegation->type & flags) - nfs_mark_return_delegation(clp, delegation); + nfs_mark_return_delegation(delegation); } +} + +static void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp, + fmode_t flags) +{ + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_mark_return_all_delegation_types(server, flags); rcu_read_unlock(); } @@ -420,19 +477,32 @@ static void nfs_delegation_run_state_manager(struct nfs_client *clp) nfs4_schedule_state_manager(clp); } +/** + * nfs_expire_all_delegation_types + * @clp: client to process + * @flags: delegation types to expire + * + */ void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags) { nfs_client_mark_return_all_delegation_types(clp, flags); nfs_delegation_run_state_manager(clp); } +/** + * nfs_expire_all_delegations + * @clp: client to process + * + */ void nfs_expire_all_delegations(struct nfs_client *clp) { nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE); } -/* - * Return all delegations following an NFS4ERR_CB_PATH_DOWN error. +/** + * nfs_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN + * @clp: client to process + * */ void nfs_handle_cb_pathdown(struct nfs_client *clp) { @@ -441,29 +511,43 @@ void nfs_handle_cb_pathdown(struct nfs_client *clp) nfs_client_mark_return_all_delegations(clp); } -static void nfs_client_mark_return_unreferenced_delegations(struct nfs_client *clp) +static void nfs_mark_return_unreferenced_delegations(struct nfs_server *server) { struct nfs_delegation *delegation; - rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { if (test_and_clear_bit(NFS_DELEGATION_REFERENCED, &delegation->flags)) continue; - nfs_mark_return_delegation(clp, delegation); + nfs_mark_return_delegation(delegation); } - rcu_read_unlock(); } +/** + * nfs_expire_unreferenced_delegations - Eliminate unused delegations + * @clp: nfs_client to process + * + */ void nfs_expire_unreferenced_delegations(struct nfs_client *clp) { - nfs_client_mark_return_unreferenced_delegations(clp); + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_mark_return_unreferenced_delegations(server); + rcu_read_unlock(); + nfs_delegation_run_state_manager(clp); } -/* - * Asynchronous delegation recall! +/** + * nfs_async_inode_return_delegation - asynchronously return a delegation + * @inode: inode to process + * @stateid: state ID information from CB_RECALL arguments + * + * Returns zero on success, or a negative errno value. */ -int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid) +int nfs_async_inode_return_delegation(struct inode *inode, + const nfs4_stateid *stateid) { struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; struct nfs_delegation *delegation; @@ -475,22 +559,21 @@ int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *s rcu_read_unlock(); return -ENOENT; } - - nfs_mark_return_delegation(clp, delegation); + nfs_mark_return_delegation(delegation); rcu_read_unlock(); + nfs_delegation_run_state_manager(clp); return 0; } -/* - * Retrieve the inode associated with a delegation - */ -struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs_fh *fhandle) +static struct inode * +nfs_delegation_find_inode_server(struct nfs_server *server, + const struct nfs_fh *fhandle) { struct nfs_delegation *delegation; struct inode *res = NULL; - rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { + + list_for_each_entry_rcu(delegation, &server->delegations, super_list) { spin_lock(&delegation->lock); if (delegation->inode != NULL && nfs_compare_fh(fhandle, &NFS_I(delegation->inode)->fh) == 0) { @@ -500,49 +583,121 @@ struct inode *nfs_delegation_find_inode(struct nfs_client *clp, const struct nfs if (res != NULL) break; } + return res; +} + +/** + * nfs_delegation_find_inode - retrieve the inode associated with a delegation + * @clp: client state handle + * @fhandle: filehandle from a delegation recall + * + * Returns pointer to inode matching "fhandle," or NULL if a matching inode + * cannot be found. + */ +struct inode *nfs_delegation_find_inode(struct nfs_client *clp, + const struct nfs_fh *fhandle) +{ + struct nfs_server *server; + struct inode *res = NULL; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + res = nfs_delegation_find_inode_server(server, fhandle); + if (res != NULL) + break; + } rcu_read_unlock(); return res; } -/* - * Mark all delegations as needing to be reclaimed +static void nfs_delegation_mark_reclaim_server(struct nfs_server *server) +{ + struct nfs_delegation *delegation; + + list_for_each_entry_rcu(delegation, &server->delegations, super_list) + set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); +} + +/** + * nfs_delegation_mark_reclaim - mark all delegations as needing to be reclaimed + * @clp: nfs_client to process + * */ void nfs_delegation_mark_reclaim(struct nfs_client *clp) { - struct nfs_delegation *delegation; + struct nfs_server *server; + rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) - set_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs_delegation_mark_reclaim_server(server); rcu_read_unlock(); } -/* - * Reap all unclaimed delegations after reboot recovery is done +/** + * nfs_delegation_reap_unclaimed - reap unclaimed delegations after reboot recovery is done + * @clp: nfs_client to process + * */ void nfs_delegation_reap_unclaimed(struct nfs_client *clp) { struct nfs_delegation *delegation; + struct nfs_server *server; struct inode *inode; + restart: rcu_read_lock(); - list_for_each_entry_rcu(delegation, &clp->cl_delegations, super_list) { - if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) - continue; - inode = nfs_delegation_grab_inode(delegation); - if (inode == NULL) - continue; - spin_lock(&clp->cl_lock); - delegation = nfs_detach_delegation_locked(NFS_I(inode), NULL, clp); - spin_unlock(&clp->cl_lock); - rcu_read_unlock(); - if (delegation != NULL) - nfs_free_delegation(delegation); - iput(inode); - goto restart; + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + list_for_each_entry_rcu(delegation, &server->delegations, + super_list) { + if (test_bit(NFS_DELEGATION_NEED_RECLAIM, + &delegation->flags) == 0) + continue; + inode = nfs_delegation_grab_inode(delegation); + if (inode == NULL) + continue; + delegation = nfs_detach_delegation(NFS_I(inode), + server); + rcu_read_unlock(); + + if (delegation != NULL) + nfs_free_delegation(delegation); + iput(inode); + goto restart; + } } rcu_read_unlock(); } +/** + * nfs_delegations_present - check for existence of delegations + * @clp: client state handle + * + * Returns one if there are any nfs_delegation structures attached + * to this nfs_client. + */ +int nfs_delegations_present(struct nfs_client *clp) +{ + struct nfs_server *server; + int ret = 0; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + if (!list_empty(&server->delegations)) { + ret = 1; + break; + } + rcu_read_unlock(); + return ret; +} + +/** + * nfs4_copy_delegation_stateid - Copy inode's state ID information + * @dst: stateid data structure to fill in + * @inode: inode to check + * + * Returns one and fills in "dst->data" * if inode had a delegation, + * otherwise zero is returned. + */ int nfs4_copy_delegation_stateid(nfs4_stateid *dst, struct inode *inode) { struct nfs_inode *nfsi = NFS_I(inode); diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h index 2026304..d9322e4 100644 --- a/fs/nfs/delegation.h +++ b/fs/nfs/delegation.h @@ -44,6 +44,7 @@ void nfs_expire_all_delegation_types(struct nfs_client *clp, fmode_t flags); void nfs_expire_unreferenced_delegations(struct nfs_client *clp); void nfs_handle_cb_pathdown(struct nfs_client *clp); int nfs_client_return_marked_delegations(struct nfs_client *clp); +int nfs_delegations_present(struct nfs_client *clp); void nfs_delegation_mark_reclaim(struct nfs_client *clp); void nfs_delegation_reap_unclaimed(struct nfs_client *clp); diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 07ac384..abe4f0c 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -33,7 +33,8 @@ #include <linux/namei.h> #include <linux/mount.h> #include <linux/sched.h> -#include <linux/vmalloc.h> +#include <linux/kmemleak.h> +#include <linux/xattr.h> #include "delegation.h" #include "iostat.h" @@ -56,7 +57,7 @@ static int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); static int nfs_fsync_dir(struct file *, int); static loff_t nfs_llseek_dir(struct file *, loff_t, int); -static int nfs_readdir_clear_array(struct page*, gfp_t); +static void nfs_readdir_clear_array(struct page*); const struct file_operations nfs_dir_operations = { .llseek = nfs_llseek_dir, @@ -82,8 +83,8 @@ const struct inode_operations nfs_dir_inode_operations = { .setattr = nfs_setattr, }; -const struct address_space_operations nfs_dir_addr_space_ops = { - .releasepage = nfs_readdir_clear_array, +const struct address_space_operations nfs_dir_aops = { + .freepage = nfs_readdir_clear_array, }; #ifdef CONFIG_NFS_V3 @@ -124,9 +125,10 @@ const struct inode_operations nfs4_dir_inode_operations = { .permission = nfs_permission, .getattr = nfs_getattr, .setattr = nfs_setattr, - .getxattr = nfs4_getxattr, - .setxattr = nfs4_setxattr, - .listxattr = nfs4_listxattr, + .getxattr = generic_getxattr, + .setxattr = generic_setxattr, + .listxattr = generic_listxattr, + .removexattr = generic_removexattr, }; #endif /* CONFIG_NFS_V4 */ @@ -161,6 +163,7 @@ struct nfs_cache_array_entry { u64 cookie; u64 ino; struct qstr string; + unsigned char d_type; }; struct nfs_cache_array { @@ -170,14 +173,13 @@ struct nfs_cache_array { struct nfs_cache_array_entry array[0]; }; -#define MAX_READDIR_ARRAY ((PAGE_SIZE - sizeof(struct nfs_cache_array)) / sizeof(struct nfs_cache_array_entry)) - -typedef __be32 * (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +typedef int (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, int); typedef struct { struct file *file; struct page *page; unsigned long page_index; u64 *dir_cookie; + u64 last_cookie; loff_t current_index; decode_dirent_t decode; @@ -194,9 +196,13 @@ typedef struct { static struct nfs_cache_array *nfs_readdir_get_array(struct page *page) { + void *ptr; if (page == NULL) return ERR_PTR(-EIO); - return (struct nfs_cache_array *)kmap(page); + ptr = kmap(page); + if (ptr == NULL) + return ERR_PTR(-ENOMEM); + return ptr; } static @@ -209,14 +215,15 @@ void nfs_readdir_release_array(struct page *page) * we are freeing strings created by nfs_add_to_readdir_array() */ static -int nfs_readdir_clear_array(struct page *page, gfp_t mask) +void nfs_readdir_clear_array(struct page *page) { - struct nfs_cache_array *array = nfs_readdir_get_array(page); + struct nfs_cache_array *array; int i; + + array = kmap_atomic(page, KM_USER0); for (i = 0; i < array->size; i++) kfree(array->array[i].string.name); - nfs_readdir_release_array(page); - return 0; + kunmap_atomic(array, KM_USER0); } /* @@ -231,6 +238,11 @@ int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int le string->name = kmemdup(name, len, GFP_KERNEL); if (string->name == NULL) return -ENOMEM; + /* + * Avoid a kmemleak false positive. The pointer to the name is stored + * in a page cache page which kmemleak does not scan. + */ + kmemleak_not_leak(string->name); string->hash = full_name_hash(name, len); return 0; } @@ -244,20 +256,24 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (IS_ERR(array)) return PTR_ERR(array); - ret = -EIO; - if (array->size >= MAX_READDIR_ARRAY) - goto out; cache_entry = &array->array[array->size]; + + /* Check that this entry lies within the page bounds */ + ret = -ENOSPC; + if ((char *)&cache_entry[1] - (char *)page_address(page) > PAGE_SIZE) + goto out; + cache_entry->cookie = entry->prev_cookie; cache_entry->ino = entry->ino; + cache_entry->d_type = entry->d_type; ret = nfs_readdir_make_qstr(&cache_entry->string, entry->name, entry->len); if (ret) goto out; array->last_cookie = entry->cookie; - if (entry->eof == 1) - array->eof_index = array->size; array->size++; + if (entry->eof != 0) + array->eof_index = array->size; out: nfs_readdir_release_array(page); return ret; @@ -272,7 +288,7 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri if (diff < 0) goto out_eof; if (diff >= array->size) { - if (array->eof_index > 0) + if (array->eof_index >= 0) goto out_eof; desc->current_index += array->size; return -EAGAIN; @@ -281,8 +297,6 @@ int nfs_readdir_search_for_pos(struct nfs_cache_array *array, nfs_readdir_descri index = (unsigned int)diff; *desc->dir_cookie = array->array[index].cookie; desc->cache_entry_index = index; - if (index == array->eof_index) - desc->eof = 1; return 0; out_eof: desc->eof = 1; @@ -296,17 +310,16 @@ int nfs_readdir_search_for_cookie(struct nfs_cache_array *array, nfs_readdir_des int status = -EAGAIN; for (i = 0; i < array->size; i++) { - if (i == array->eof_index) { - desc->eof = 1; - status = -EBADCOOKIE; - } if (array->array[i].cookie == *desc->dir_cookie) { desc->cache_entry_index = i; - status = 0; - break; + return 0; } } - + if (array->eof_index >= 0) { + status = -EBADCOOKIE; + if (*desc->dir_cookie == array->last_cookie) + desc->eof = 1; + } return status; } @@ -314,10 +327,7 @@ static int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) { struct nfs_cache_array *array; - int status = -EBADCOOKIE; - - if (desc->dir_cookie == NULL) - goto out; + int status; array = nfs_readdir_get_array(desc->page); if (IS_ERR(array)) { @@ -330,6 +340,10 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) else status = nfs_readdir_search_for_cookie(array, desc); + if (status == -EAGAIN) { + desc->last_cookie = array->last_cookie; + desc->page_index++; + } nfs_readdir_release_array(desc->page); out: return status; @@ -365,14 +379,14 @@ error: return error; } -/* Fill in an entry based on the xdr code stored in desc->page */ -static -int xdr_decode(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct xdr_stream *stream) +static int xdr_decode(nfs_readdir_descriptor_t *desc, + struct nfs_entry *entry, struct xdr_stream *xdr) { - __be32 *p = desc->decode(stream, entry, NFS_SERVER(desc->file->f_path.dentry->d_inode), desc->plus); - if (IS_ERR(p)) - return PTR_ERR(p); + int error; + error = desc->decode(xdr, entry, desc->plus); + if (error) + return error; entry->fattr->time_start = desc->timestamp; entry->fattr->gencount = desc->gencount; return 0; @@ -381,13 +395,9 @@ int xdr_decode(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, struct x static int nfs_same_file(struct dentry *dentry, struct nfs_entry *entry) { - struct nfs_inode *node; if (dentry->d_inode == NULL) goto different; - node = NFS_I(dentry->d_inode); - if (node->fh.size != entry->fh->size) - goto different; - if (strncmp(node->fh.data, entry->fh->data, node->fh.size) != 0) + if (nfs_compare_fh(entry->fh, NFS_FH(dentry->d_inode)) != 0) goto different; return 1; different: @@ -429,7 +439,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) if (dentry == NULL) return; - dentry->d_op = NFS_PROTO(dir)->dentry_ops; + d_set_d_op(dentry, NFS_PROTO(dir)->dentry_ops); inode = nfs_fhget(dentry->d_sb, entry->fh, entry->fattr); if (IS_ERR(inode)) goto out; @@ -449,43 +459,58 @@ out: /* Perform conversion from xdr to cache array */ static -void nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, - void *xdr_page, struct page *page, unsigned int buflen) +int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *entry, + struct page **xdr_pages, struct page *page, unsigned int buflen) { struct xdr_stream stream; - struct xdr_buf buf; - __be32 *ptr = xdr_page; - int status; + struct xdr_buf buf = { + .pages = xdr_pages, + .page_len = buflen, + .buflen = buflen, + .len = buflen, + }; + struct page *scratch; struct nfs_cache_array *array; + unsigned int count = 0; + int status; - buf.head->iov_base = xdr_page; - buf.head->iov_len = buflen; - buf.tail->iov_len = 0; - buf.page_base = 0; - buf.page_len = 0; - buf.buflen = buf.head->iov_len; - buf.len = buf.head->iov_len; - - xdr_init_decode(&stream, &buf, ptr); + scratch = alloc_page(GFP_KERNEL); + if (scratch == NULL) + return -ENOMEM; + xdr_init_decode(&stream, &buf, NULL); + xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); do { status = xdr_decode(desc, entry, &stream); - if (status != 0) + if (status != 0) { + if (status == -EAGAIN) + status = 0; break; + } - if (nfs_readdir_add_to_array(entry, page) == -1) - break; - if (desc->plus == 1) + count++; + + if (desc->plus != 0) nfs_prime_dcache(desc->file->f_path.dentry, entry); + + status = nfs_readdir_add_to_array(entry, page); + if (status != 0) + break; } while (!entry->eof); - if (status == -EBADCOOKIE && entry->eof) { + if (count == 0 || (status == -EBADCOOKIE && entry->eof != 0)) { array = nfs_readdir_get_array(page); - array->eof_index = array->size - 1; - status = 0; - nfs_readdir_release_array(page); + if (!IS_ERR(array)) { + array->eof_index = array->size; + status = 0; + nfs_readdir_release_array(page); + } else + status = PTR_ERR(array); } + + put_page(scratch); + return status; } static @@ -500,7 +525,6 @@ static void nfs_readdir_free_large_page(void *ptr, struct page **pages, unsigned int npages) { - vm_unmap_ram(ptr, npages); nfs_readdir_free_pagearray(pages, npages); } @@ -509,9 +533,8 @@ void nfs_readdir_free_large_page(void *ptr, struct page **pages, * to nfs_readdir_free_large_page */ static -void *nfs_readdir_large_page(struct page **pages, unsigned int npages) +int nfs_readdir_large_page(struct page **pages, unsigned int npages) { - void *ptr; unsigned int i; for (i = 0; i < npages; i++) { @@ -520,13 +543,11 @@ void *nfs_readdir_large_page(struct page **pages, unsigned int npages) goto out_freepages; pages[i] = page; } + return 0; - ptr = vm_map_ram(pages, npages, 0, PAGE_KERNEL); - if (!IS_ERR_OR_NULL(ptr)) - return ptr; out_freepages: nfs_readdir_free_pagearray(pages, i); - return NULL; + return -ENOMEM; } static @@ -537,31 +558,43 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, struct nfs_entry entry; struct file *file = desc->file; struct nfs_cache_array *array; - int status = 0; + int status = -ENOMEM; unsigned int array_size = ARRAY_SIZE(pages); entry.prev_cookie = 0; - entry.cookie = *desc->dir_cookie; + entry.cookie = desc->last_cookie; entry.eof = 0; entry.fh = nfs_alloc_fhandle(); entry.fattr = nfs_alloc_fattr(); + entry.server = NFS_SERVER(inode); if (entry.fh == NULL || entry.fattr == NULL) goto out; array = nfs_readdir_get_array(page); + if (IS_ERR(array)) { + status = PTR_ERR(array); + goto out; + } memset(array, 0, sizeof(struct nfs_cache_array)); array->eof_index = -1; - pages_ptr = nfs_readdir_large_page(pages, array_size); - if (!pages_ptr) + status = nfs_readdir_large_page(pages, array_size); + if (status < 0) goto out_release_array; do { + unsigned int pglen; status = nfs_readdir_xdr_filler(pages, desc, &entry, file, inode); if (status < 0) break; - nfs_readdir_page_filler(desc, &entry, pages_ptr, page, array_size * PAGE_SIZE); - } while (array->eof_index < 0 && array->size < MAX_READDIR_ARRAY); + pglen = status; + status = nfs_readdir_page_filler(desc, &entry, pages, page, pglen); + if (status < 0) { + if (status == -ENOSPC) + status = 0; + break; + } + } while (array->eof_index < 0); nfs_readdir_free_large_page(pages_ptr, pages, array_size); out_release_array: @@ -582,8 +615,10 @@ static int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) { struct inode *inode = desc->file->f_path.dentry->d_inode; + int ret; - if (nfs_readdir_xdr_to_array(desc, page, inode) < 0) + ret = nfs_readdir_xdr_to_array(desc, page, inode); + if (ret < 0) goto error; SetPageUptodate(page); @@ -595,12 +630,14 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) return 0; error: unlock_page(page); - return -EIO; + return ret; } static void cache_page_release(nfs_readdir_descriptor_t *desc) { + if (!desc->page->mapping) + nfs_readdir_clear_array(desc->page); page_cache_release(desc->page); desc->page = NULL; } @@ -608,12 +645,8 @@ void cache_page_release(nfs_readdir_descriptor_t *desc) static struct page *get_cache_page(nfs_readdir_descriptor_t *desc) { - struct page *page; - page = read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, + return read_cache_page(desc->file->f_path.dentry->d_inode->i_mapping, desc->page_index, (filler_t *)nfs_readdir_filler, desc); - if (IS_ERR(page)) - desc->eof = 1; - return page; } /* @@ -629,9 +662,8 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) return PTR_ERR(desc->page); res = nfs_readdir_search_array(desc); - if (res == 0) - return 0; - cache_page_release(desc); + if (res != 0) + cache_page_release(desc); return res; } @@ -639,22 +671,18 @@ int find_cache_page(nfs_readdir_descriptor_t *desc) static inline int readdir_search_pagecache(nfs_readdir_descriptor_t *desc) { - int res = -EAGAIN; + int res; - while (1) { - res = find_cache_page(desc); - if (res != -EAGAIN) - break; - desc->page_index++; + if (desc->page_index == 0) { + desc->current_index = 0; + desc->last_cookie = 0; } + do { + res = find_cache_page(desc); + } while (res == -EAGAIN); return res; } -static inline unsigned int dt_type(struct inode *inode) -{ - return (inode->i_mode >> 12) & 15; -} - /* * Once we've found the start of the dirent within a page: fill 'er up... */ @@ -666,35 +694,35 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, int i = 0; int res = 0; struct nfs_cache_array *array = NULL; - unsigned int d_type = DT_UNKNOWN; - struct dentry *dentry = NULL; array = nfs_readdir_get_array(desc->page); + if (IS_ERR(array)) { + res = PTR_ERR(array); + goto out; + } for (i = desc->cache_entry_index; i < array->size; i++) { - d_type = DT_UNKNOWN; + struct nfs_cache_array_entry *ent; - res = filldir(dirent, array->array[i].string.name, - array->array[i].string.len, file->f_pos, - nfs_compat_user_ino64(array->array[i].ino), d_type); - if (res < 0) + ent = &array->array[i]; + if (filldir(dirent, ent->string.name, ent->string.len, + file->f_pos, nfs_compat_user_ino64(ent->ino), + ent->d_type) < 0) { + desc->eof = 1; break; + } file->f_pos++; - desc->cache_entry_index = i; if (i < (array->size-1)) *desc->dir_cookie = array->array[i+1].cookie; else *desc->dir_cookie = array->last_cookie; - if (i == array->eof_index) { - desc->eof = 1; - break; - } } + if (array->eof_index >= 0) + desc->eof = 1; nfs_readdir_release_array(desc->page); +out: cache_page_release(desc); - if (dentry != NULL) - dput(dentry); dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); return res; @@ -729,13 +757,14 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, goto out; } - if (nfs_readdir_xdr_to_array(desc, page, inode) == -1) { - status = -EIO; - goto out_release; - } - desc->page_index = 0; + desc->last_cookie = *desc->dir_cookie; desc->page = page; + + status = nfs_readdir_xdr_to_array(desc, page, inode); + if (status < 0) + goto out_release; + status = nfs_do_filldir(desc, dirent, filldir); out: @@ -757,7 +786,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) struct inode *inode = dentry->d_inode; nfs_readdir_descriptor_t my_desc, *desc = &my_desc; - int res = -ENOMEM; + int res; dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n", dentry->d_parent->d_name.name, dentry->d_name.name, @@ -782,18 +811,18 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (res < 0) goto out; - while (desc->eof != 1) { + do { res = readdir_search_pagecache(desc); if (res == -EBADCOOKIE) { + res = 0; /* This means either end of directory */ if (*desc->dir_cookie && desc->eof == 0) { /* Or that the server has 'lost' a cookie */ res = uncached_readdir(desc, dirent, filldir); - if (res >= 0) + if (res == 0) continue; } - res = 0; break; } if (res == -ETOOSMALL && desc->plus) { @@ -808,11 +837,9 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) break; res = nfs_do_filldir(desc, dirent, filldir); - if (res < 0) { - res = 0; + if (res < 0) break; - } - } + } while (!desc->eof); out: nfs_unblock_sillyrename(dentry); if (res > 0) @@ -912,7 +939,8 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry) * component of the path. * We check for this using LOOKUP_CONTINUE and LOOKUP_PARENT. */ -static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd, unsigned int mask) +static inline unsigned int nfs_lookup_check_intent(struct nameidata *nd, + unsigned int mask) { if (nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT)) return 0; @@ -992,7 +1020,7 @@ int nfs_neg_need_reval(struct inode *dir, struct dentry *dentry, * If the parent directory is seen to have changed, we throw out the * cached dentry and do a new lookup. */ -static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) +static int nfs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd) { struct inode *dir; struct inode *inode; @@ -1001,6 +1029,9 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) struct nfs_fattr *fattr = NULL; int error; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + parent = dget_parent(dentry); dir = parent->d_inode; nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE); @@ -1091,7 +1122,7 @@ out_error: /* * This is called from dput() when d_count is going to 0. */ -static int nfs_dentry_delete(struct dentry *dentry) +static int nfs_dentry_delete(const struct dentry *dentry) { dfprintk(VFS, "NFS: dentry_delete(%s/%s, %x)\n", dentry->d_parent->d_name.name, dentry->d_name.name, @@ -1162,7 +1193,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru if (dentry->d_name.len > NFS_SERVER(dir)->namelen) goto out; - dentry->d_op = NFS_PROTO(dir)->dentry_ops; + d_set_d_op(dentry, NFS_PROTO(dir)->dentry_ops); /* * If we're doing an exclusive create, optimize away the lookup @@ -1191,7 +1222,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru goto out_unblock_sillyrename; } inode = nfs_fhget(dentry->d_sb, fhandle, fattr); - res = (struct dentry *)inode; + res = ERR_CAST(inode); if (IS_ERR(res)) goto out_unblock_sillyrename; @@ -1307,7 +1338,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry res = ERR_PTR(-ENAMETOOLONG); goto out; } - dentry->d_op = NFS_PROTO(dir)->dentry_ops; + d_set_d_op(dentry, NFS_PROTO(dir)->dentry_ops); /* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash * the dentry. */ @@ -1325,8 +1356,7 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry if (nd->flags & LOOKUP_CREATE) { attr.ia_mode = nd->intent.open.create_mode; attr.ia_valid = ATTR_MODE; - if (!IS_POSIXACL(dir)) - attr.ia_mode &= ~current_umask(); + attr.ia_mode &= ~current_umask(); } else { open_flags &= ~(O_EXCL | O_CREAT); attr.ia_valid = 0; @@ -1345,12 +1375,12 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry res = NULL; goto out; /* This turned out not to be a regular file */ - case -EISDIR: case -ENOTDIR: goto no_open; case -ELOOP: if (!(nd->intent.open.flags & O_NOFOLLOW)) goto no_open; + /* case -EISDIR: */ /* case -EINVAL: */ default: res = ERR_CAST(inode); @@ -1692,11 +1722,9 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry) dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); - spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); - if (atomic_read(&dentry->d_count) > 1) { + if (dentry->d_count > 1) { spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); /* Start asynchronous writeout of the inode */ write_inode_now(dentry->d_inode, 0); error = nfs_sillyrename(dir, dentry); @@ -1707,7 +1735,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry) need_rehash = 1; } spin_unlock(&dentry->d_lock); - spin_unlock(&dcache_lock); error = nfs_safe_remove(dentry); if (!error || error == -ENOENT) { nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); @@ -1842,7 +1869,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, dfprintk(VFS, "NFS: rename(%s/%s -> %s/%s, ct=%d)\n", old_dentry->d_parent->d_name.name, old_dentry->d_name.name, new_dentry->d_parent->d_name.name, new_dentry->d_name.name, - atomic_read(&new_dentry->d_count)); + new_dentry->d_count); /* * For non-directories, check whether the target is busy and if so, @@ -1860,7 +1887,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry, rehash = new_dentry; } - if (atomic_read(&new_dentry->d_count) > 2) { + if (new_dentry->d_count > 2) { int err; /* copy the target dentry's name */ @@ -2162,11 +2189,14 @@ int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags) return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags)); } -int nfs_permission(struct inode *inode, int mask) +int nfs_permission(struct inode *inode, int mask, unsigned int flags) { struct rpc_cred *cred; int res = 0; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + nfs_inc_stats(inode, NFSIOS_VFSACCESS); if ((mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0) @@ -2214,7 +2244,7 @@ out: out_notsup: res = nfs_revalidate_inode(NFS_SERVER(inode), inode); if (res == 0) - res = generic_permission(inode, mask, NULL); + res = generic_permission(inode, mask, flags, NULL); goto out; } diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 064a809..e6ace0d 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -867,13 +867,13 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov, goto out; nfs_alloc_commit_data(dreq); - if (dreq->commit_data == NULL || count < wsize) + if (dreq->commit_data == NULL || count <= wsize) sync = NFS_FILE_SYNC; dreq->inode = inode; dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp)); dreq->l_ctx = nfs_get_lock_context(dreq->ctx); - if (dreq->l_ctx != NULL) + if (dreq->l_ctx == NULL) goto out_release; if (!is_sync_kiocb(iocb)) dreq->iocb = iocb; diff --git a/fs/nfs/file.c b/fs/nfs/file.c index e756075..7bf029e 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -693,6 +693,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) { struct inode *inode = filp->f_mapping->host; int status = 0; + unsigned int saved_type = fl->fl_type; /* Try local locking first */ posix_test_lock(filp, fl); @@ -700,6 +701,7 @@ do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local) /* found a conflict */ goto out; } + fl->fl_type = saved_type; if (nfs_have_delegation(inode, FMODE_READ)) goto out_noconflict; @@ -884,6 +886,5 @@ static int nfs_setlease(struct file *file, long arg, struct file_lock **fl) dprintk("NFS: setlease(%s/%s, arg=%ld)\n", file->f_path.dentry->d_parent->d_name.name, file->f_path.dentry->d_name.name, arg); - return -EINVAL; } diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c index ac7b814..5596c6a 100644 --- a/fs/nfs/getroot.c +++ b/fs/nfs/getroot.c @@ -63,9 +63,11 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i * This again causes shrink_dcache_for_umount_subtree() to * Oops, since the test for IS_ROOT() will fail. */ - spin_lock(&dcache_lock); + spin_lock(&sb->s_root->d_inode->i_lock); + spin_lock(&sb->s_root->d_lock); list_del_init(&sb->s_root->d_alias); - spin_unlock(&dcache_lock); + spin_unlock(&sb->s_root->d_lock); + spin_unlock(&sb->s_root->d_inode->i_lock); } return 0; } @@ -119,7 +121,7 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh) security_d_instantiate(ret, inode); if (ret->d_op == NULL) - ret->d_op = server->nfs_client->rpc_ops->dentry_ops; + d_set_d_op(ret, server->nfs_client->rpc_ops->dentry_ops); out: nfs_free_fattr(fsinfo.fattr); return ret; @@ -226,7 +228,7 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh) security_d_instantiate(ret, inode); if (ret->d_op == NULL) - ret->d_op = server->nfs_client->rpc_ops->dentry_ops; + d_set_d_op(ret, server->nfs_client->rpc_ops->dentry_ops); out: nfs_free_fattr(fattr); diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index dec47ed..1869688 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -123,7 +123,7 @@ static ssize_t nfs_idmap_get_desc(const char *name, size_t namelen, size_t desclen = typelen + namelen + 2; *desc = kmalloc(desclen, GFP_KERNEL); - if (!desc) + if (!*desc) return -ENOMEM; cp = *desc; @@ -238,7 +238,7 @@ int nfs_map_gid_to_group(struct nfs_client *clp, __u32 gid, char *buf, size_t bu return nfs_idmap_lookup_name(gid, "group", buf, buflen); } -#else /* CONFIG_NFS_USE_IDMAPPER not defined */ +#else /* CONFIG_NFS_USE_NEW_IDMAPPER not defined */ #include <linux/module.h> #include <linux/mutex.h> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 314f571..ce00b70 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -289,6 +289,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) } else if (S_ISDIR(inode->i_mode)) { inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; inode->i_fop = &nfs_dir_operations; + inode->i_data.a_ops = &nfs_dir_aops; if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)) set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags); /* Deal with crossing mountpoints */ @@ -1409,9 +1410,9 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) */ void nfs4_evict_inode(struct inode *inode) { + pnfs_destroy_layout(NFS_I(inode)); truncate_inode_pages(&inode->i_data, 0); end_writeback(inode); - pnfs_destroy_layout(NFS_I(inode)); /* If we are holding a delegation, return it! */ nfs_inode_return_delegation_noreclaim(inode); /* First call standard NFS clear_inode() code */ @@ -1437,11 +1438,18 @@ struct inode *nfs_alloc_inode(struct super_block *sb) return &nfsi->vfs_inode; } -void nfs_destroy_inode(struct inode *inode) +static void nfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); } +void nfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, nfs_i_callback); +} + static inline void nfs4_init_once(struct nfs_inode *nfsi) { #ifdef CONFIG_NFS_V4 @@ -1611,6 +1619,7 @@ static void __exit exit_nfs_fs(void) #ifdef CONFIG_PROC_FS rpc_proc_unregister("nfs"); #endif + nfs_cleanup_cb_ident_idr(); unregister_nfs_fs(); nfs_fs_proc_exit(); nfsiod_stop(); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index db08ff3..bfa3a34 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -128,9 +128,13 @@ extern void nfs_umount(const struct nfs_mount_request *info); /* client.c */ extern struct rpc_program nfs_program; +extern void nfs_cleanup_cb_ident_idr(void); extern void nfs_put_client(struct nfs_client *); -extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32); -extern struct nfs_client *nfs_find_client_next(struct nfs_client *); +extern struct nfs_client *nfs4_find_client_no_ident(const struct sockaddr *); +extern struct nfs_client *nfs4_find_client_ident(int); +extern struct nfs_client * +nfs4_find_client_sessionid(const struct sockaddr *, struct nfs4_sessionid *, + int); extern struct nfs_server *nfs_create_server( const struct nfs_parsed_mount_data *, struct nfs_fh *); @@ -185,17 +189,20 @@ extern int __init nfs_init_directcache(void); extern void nfs_destroy_directcache(void); /* nfs2xdr.c */ -extern int nfs_stat_to_errno(int); +extern int nfs_stat_to_errno(enum nfs_stat); extern struct rpc_procinfo nfs_procedures[]; -extern __be32 *nfs_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +extern int nfs2_decode_dirent(struct xdr_stream *, + struct nfs_entry *, int); /* nfs3xdr.c */ extern struct rpc_procinfo nfs3_procedures[]; -extern __be32 *nfs3_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +extern int nfs3_decode_dirent(struct xdr_stream *, + struct nfs_entry *, int); /* nfs4xdr.c */ #ifdef CONFIG_NFS_V4 -extern __be32 *nfs4_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); +extern int nfs4_decode_dirent(struct xdr_stream *, + struct nfs_entry *, int); #endif #ifdef CONFIG_NFS_V4_1 extern const u32 nfs41_maxread_overhead; @@ -362,6 +369,15 @@ unsigned int nfs_page_length(struct page *page) } /* + * Convert a umode to a dirent->d_type + */ +static inline +unsigned char nfs_umode_to_dtype(umode_t mode) +{ + return (mode >> 12) & 15; +} + +/* * Determine the number of pages in an array of length 'len' and * with a base offset of 'base' */ diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index eceafe7..d4c2d6b 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -236,10 +236,8 @@ void nfs_umount(const struct nfs_mount_request *info) .authflavor = RPC_AUTH_UNIX, .flags = RPC_CLNT_CREATE_NOPING, }; - struct mountres result; struct rpc_message msg = { .rpc_argp = info->dirpath, - .rpc_resp = &result, }; struct rpc_clnt *clnt; int status; @@ -248,7 +246,7 @@ void nfs_umount(const struct nfs_mount_request *info) args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; clnt = rpc_create(&args); - if (unlikely(IS_ERR(clnt))) + if (IS_ERR(clnt)) goto out_clnt_err; dprintk("NFS: sending UMNT request for %s:%s\n", @@ -280,29 +278,20 @@ out_call_err: * XDR encode/decode functions for MOUNT */ -static int encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) +static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) { const u32 pathname_len = strlen(pathname); __be32 *p; - if (unlikely(pathname_len > MNTPATHLEN)) - return -EIO; - - p = xdr_reserve_space(xdr, sizeof(u32) + pathname_len); - if (unlikely(p == NULL)) - return -EIO; + BUG_ON(pathname_len > MNTPATHLEN); + p = xdr_reserve_space(xdr, 4 + pathname_len); xdr_encode_opaque(p, pathname, pathname_len); - - return 0; } -static int mnt_enc_dirpath(struct rpc_rqst *req, __be32 *p, - const char *dirpath) +static void mnt_xdr_enc_dirpath(struct rpc_rqst *req, struct xdr_stream *xdr, + const char *dirpath) { - struct xdr_stream xdr; - - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - return encode_mntdirpath(&xdr, dirpath); + encode_mntdirpath(xdr, dirpath); } /* @@ -320,10 +309,10 @@ static int decode_status(struct xdr_stream *xdr, struct mountres *res) u32 status; __be32 *p; - p = xdr_inline_decode(xdr, sizeof(status)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - status = ntohl(*p); + status = be32_to_cpup(p); for (i = 0; i < ARRAY_SIZE(mnt_errtbl); i++) { if (mnt_errtbl[i].status == status) { @@ -351,18 +340,16 @@ static int decode_fhandle(struct xdr_stream *xdr, struct mountres *res) return 0; } -static int mnt_dec_mountres(struct rpc_rqst *req, __be32 *p, - struct mountres *res) +static int mnt_xdr_dec_mountres(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct mountres *res) { - struct xdr_stream xdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - - status = decode_status(&xdr, res); + status = decode_status(xdr, res); if (unlikely(status != 0 || res->errno != 0)) return status; - return decode_fhandle(&xdr, res); + return decode_fhandle(xdr, res); } static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res) @@ -371,10 +358,10 @@ static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res) u32 status; __be32 *p; - p = xdr_inline_decode(xdr, sizeof(status)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - status = ntohl(*p); + status = be32_to_cpup(p); for (i = 0; i < ARRAY_SIZE(mnt3_errtbl); i++) { if (mnt3_errtbl[i].status == status) { @@ -394,11 +381,11 @@ static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res) u32 size; __be32 *p; - p = xdr_inline_decode(xdr, sizeof(size)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - size = ntohl(*p++); + size = be32_to_cpup(p); if (size > NFS3_FHSIZE || size == 0) return -EIO; @@ -421,15 +408,15 @@ static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) if (*count == 0) return 0; - p = xdr_inline_decode(xdr, sizeof(entries)); + p = xdr_inline_decode(xdr, 4); if (unlikely(p == NULL)) return -EIO; - entries = ntohl(*p); + entries = be32_to_cpup(p); dprintk("NFS: received %u auth flavors\n", entries); if (entries > NFS_MAX_SECFLAVORS) entries = NFS_MAX_SECFLAVORS; - p = xdr_inline_decode(xdr, sizeof(u32) * entries); + p = xdr_inline_decode(xdr, 4 * entries); if (unlikely(p == NULL)) return -EIO; @@ -437,7 +424,7 @@ static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) entries = *count; for (i = 0; i < entries; i++) { - flavors[i] = ntohl(*p++); + flavors[i] = be32_to_cpup(p++); dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]); } *count = i; @@ -445,30 +432,28 @@ static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) return 0; } -static int mnt_dec_mountres3(struct rpc_rqst *req, __be32 *p, - struct mountres *res) +static int mnt_xdr_dec_mountres3(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct mountres *res) { - struct xdr_stream xdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - - status = decode_fhs_status(&xdr, res); + status = decode_fhs_status(xdr, res); if (unlikely(status != 0 || res->errno != 0)) return status; - status = decode_fhandle3(&xdr, res); + status = decode_fhandle3(xdr, res); if (unlikely(status != 0)) { res->errno = -EBADHANDLE; return 0; } - return decode_auth_flavors(&xdr, res); + return decode_auth_flavors(xdr, res); } static struct rpc_procinfo mnt_procedures[] = { [MOUNTPROC_MNT] = { .p_proc = MOUNTPROC_MNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, - .p_decode = (kxdrproc_t)mnt_dec_mountres, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, + .p_decode = (kxdrdproc_t)mnt_xdr_dec_mountres, .p_arglen = MNT_enc_dirpath_sz, .p_replen = MNT_dec_mountres_sz, .p_statidx = MOUNTPROC_MNT, @@ -476,7 +461,7 @@ static struct rpc_procinfo mnt_procedures[] = { }, [MOUNTPROC_UMNT] = { .p_proc = MOUNTPROC_UMNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, .p_arglen = MNT_enc_dirpath_sz, .p_statidx = MOUNTPROC_UMNT, .p_name = "UMOUNT", @@ -486,8 +471,8 @@ static struct rpc_procinfo mnt_procedures[] = { static struct rpc_procinfo mnt3_procedures[] = { [MOUNTPROC3_MNT] = { .p_proc = MOUNTPROC3_MNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, - .p_decode = (kxdrproc_t)mnt_dec_mountres3, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, + .p_decode = (kxdrdproc_t)mnt_xdr_dec_mountres3, .p_arglen = MNT_enc_dirpath_sz, .p_replen = MNT_dec_mountres3_sz, .p_statidx = MOUNTPROC3_MNT, @@ -495,7 +480,7 @@ static struct rpc_procinfo mnt3_procedures[] = { }, [MOUNTPROC3_UMNT] = { .p_proc = MOUNTPROC3_UMNT, - .p_encode = (kxdrproc_t)mnt_enc_dirpath, + .p_encode = (kxdreproc_t)mnt_xdr_enc_dirpath, .p_arglen = MNT_enc_dirpath_sz, .p_statidx = MOUNTPROC3_UMNT, .p_name = "UMOUNT", @@ -505,13 +490,13 @@ static struct rpc_procinfo mnt3_procedures[] = { static struct rpc_version mnt_version1 = { .number = 1, - .nrprocs = 2, + .nrprocs = ARRAY_SIZE(mnt_procedures), .procs = mnt_procedures, }; static struct rpc_version mnt_version3 = { .number = 3, - .nrprocs = 2, + .nrprocs = ARRAY_SIZE(mnt3_procedures), .procs = mnt3_procedures, }; diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index db6aa36..74aaf39 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -49,12 +49,17 @@ char *nfs_path(const char *base, const struct dentry *dentry, char *buffer, ssize_t buflen) { - char *end = buffer+buflen; + char *end; int namelen; + unsigned seq; +rename_retry: + end = buffer+buflen; *--end = '\0'; buflen--; - spin_lock(&dcache_lock); + + seq = read_seqbegin(&rename_lock); + rcu_read_lock(); while (!IS_ROOT(dentry) && dentry != droot) { namelen = dentry->d_name.len; buflen -= namelen + 1; @@ -65,7 +70,9 @@ char *nfs_path(const char *base, *--end = '/'; dentry = dentry->d_parent; } - spin_unlock(&dcache_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; if (*end != '/') { if (--buflen < 0) goto Elong; @@ -82,7 +89,9 @@ char *nfs_path(const char *base, memcpy(end, base, namelen); return end; Elong_unlock: - spin_unlock(&dcache_lock); + rcu_read_unlock(); + if (read_seqretry(&rename_lock, seq)) + goto rename_retry; Elong: return ERR_PTR(-ENAMETOOLONG); } diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c index e6bf457..792cb13 100644 --- a/fs/nfs/nfs2xdr.c +++ b/fs/nfs/nfs2xdr.c @@ -61,582 +61,1008 @@ #define NFS_readdirres_sz (1) #define NFS_statfsres_sz (1+NFS_info_sz) + /* - * Common NFS XDR functions as inlines + * While encoding arguments, set up the reply buffer in advance to + * receive reply data directly into the page cache. */ -static inline __be32 * -xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fhandle) +static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, + unsigned int base, unsigned int len, + unsigned int bufsize) { - memcpy(p, fhandle->data, NFS2_FHSIZE); - return p + XDR_QUADLEN(NFS2_FHSIZE); + struct rpc_auth *auth = req->rq_cred->cr_auth; + unsigned int replen; + + replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; + xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); } -static inline __be32 * -xdr_decode_fhandle(__be32 *p, struct nfs_fh *fhandle) +/* + * Handle decode buffer overflows out-of-line. + */ +static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) { - /* NFSv2 handles have a fixed length */ - fhandle->size = NFS2_FHSIZE; - memcpy(fhandle->data, p, NFS2_FHSIZE); - return p + XDR_QUADLEN(NFS2_FHSIZE); + dprintk("NFS: %s prematurely hit the end of our receive buffer. " + "Remaining buffer length is %tu words.\n", + func, xdr->end - xdr->p); } -static inline __be32* -xdr_encode_time(__be32 *p, struct timespec *timep) + +/* + * Encode/decode NFSv2 basic data types + * + * Basic NFSv2 data types are defined in section 2.3 of RFC 1094: + * "NFS: Network File System Protocol Specification". + * + * Not all basic data types have their own encoding and decoding + * functions. For run-time efficiency, some data types are encoded + * or decoded inline. + */ + +/* + * typedef opaque nfsdata<>; + */ +static int decode_nfsdata(struct xdr_stream *xdr, struct nfs_readres *result) { - *p++ = htonl(timep->tv_sec); - /* Convert nanoseconds into microseconds */ - *p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0); + u32 recvd, count; + size_t hdrlen; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(count > recvd)) + goto out_cheating; +out: + xdr_read_pages(xdr, count); + result->eof = 0; /* NFSv2 does not pass EOF flag on the wire. */ + result->count = count; + return count; +out_cheating: + dprintk("NFS: server cheating in read result: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + goto out; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * enum stat { + * NFS_OK = 0, + * NFSERR_PERM = 1, + * NFSERR_NOENT = 2, + * NFSERR_IO = 5, + * NFSERR_NXIO = 6, + * NFSERR_ACCES = 13, + * NFSERR_EXIST = 17, + * NFSERR_NODEV = 19, + * NFSERR_NOTDIR = 20, + * NFSERR_ISDIR = 21, + * NFSERR_FBIG = 27, + * NFSERR_NOSPC = 28, + * NFSERR_ROFS = 30, + * NFSERR_NAMETOOLONG = 63, + * NFSERR_NOTEMPTY = 66, + * NFSERR_DQUOT = 69, + * NFSERR_STALE = 70, + * NFSERR_WFLUSH = 99 + * }; + */ +static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *status = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * 2.3.2. ftype + * + * enum ftype { + * NFNON = 0, + * NFREG = 1, + * NFDIR = 2, + * NFBLK = 3, + * NFCHR = 4, + * NFLNK = 5 + * }; + * + */ +static __be32 *xdr_decode_ftype(__be32 *p, u32 *type) +{ + *type = be32_to_cpup(p++); + if (unlikely(*type > NF2FIFO)) + *type = NFBAD; return p; } -static inline __be32* -xdr_encode_current_server_time(__be32 *p, struct timespec *timep) +/* + * 2.3.3. fhandle + * + * typedef opaque fhandle[FHSIZE]; + */ +static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh) +{ + __be32 *p; + + BUG_ON(fh->size != NFS2_FHSIZE); + p = xdr_reserve_space(xdr, NFS2_FHSIZE); + memcpy(p, fh->data, NFS2_FHSIZE); +} + +static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh) { - /* - * Passing the invalid value useconds=1000000 is a - * Sun convention for "set to current server time". - * It's needed to make permissions checks for the - * "touch" program across v2 mounts to Solaris and - * Irix boxes work correctly. See description of - * sattr in section 6.1 of "NFS Illustrated" by - * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5 - */ - *p++ = htonl(timep->tv_sec); - *p++ = htonl(1000000); + __be32 *p; + + p = xdr_inline_decode(xdr, NFS2_FHSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + fh->size = NFS2_FHSIZE; + memcpy(fh->data, p, NFS2_FHSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * 2.3.4. timeval + * + * struct timeval { + * unsigned int seconds; + * unsigned int useconds; + * }; + */ +static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep) +{ + *p++ = cpu_to_be32(timep->tv_sec); + if (timep->tv_nsec != 0) + *p++ = cpu_to_be32(timep->tv_nsec / NSEC_PER_USEC); + else + *p++ = cpu_to_be32(0); + return p; +} + +/* + * Passing the invalid value useconds=1000000 is a Sun convention for + * "set to current server time". It's needed to make permissions checks + * for the "touch" program across v2 mounts to Solaris and Irix servers + * work correctly. See description of sattr in section 6.1 of "NFS + * Illustrated" by Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5. + */ +static __be32 *xdr_encode_current_server_time(__be32 *p, + const struct timespec *timep) +{ + *p++ = cpu_to_be32(timep->tv_sec); + *p++ = cpu_to_be32(1000000); return p; } -static inline __be32* -xdr_decode_time(__be32 *p, struct timespec *timep) +static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep) { - timep->tv_sec = ntohl(*p++); - /* Convert microseconds into nanoseconds */ - timep->tv_nsec = ntohl(*p++) * 1000; + timep->tv_sec = be32_to_cpup(p++); + timep->tv_nsec = be32_to_cpup(p++) * NSEC_PER_USEC; return p; } -static __be32 * -xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) +/* + * 2.3.5. fattr + * + * struct fattr { + * ftype type; + * unsigned int mode; + * unsigned int nlink; + * unsigned int uid; + * unsigned int gid; + * unsigned int size; + * unsigned int blocksize; + * unsigned int rdev; + * unsigned int blocks; + * unsigned int fsid; + * unsigned int fileid; + * timeval atime; + * timeval mtime; + * timeval ctime; + * }; + * + */ +static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { u32 rdev, type; - type = ntohl(*p++); - fattr->mode = ntohl(*p++); - fattr->nlink = ntohl(*p++); - fattr->uid = ntohl(*p++); - fattr->gid = ntohl(*p++); - fattr->size = ntohl(*p++); - fattr->du.nfs2.blocksize = ntohl(*p++); - rdev = ntohl(*p++); - fattr->du.nfs2.blocks = ntohl(*p++); - fattr->fsid.major = ntohl(*p++); - fattr->fsid.minor = 0; - fattr->fileid = ntohl(*p++); - p = xdr_decode_time(p, &fattr->atime); - p = xdr_decode_time(p, &fattr->mtime); - p = xdr_decode_time(p, &fattr->ctime); + __be32 *p; + + p = xdr_inline_decode(xdr, NFS_fattr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + fattr->valid |= NFS_ATTR_FATTR_V2; + + p = xdr_decode_ftype(p, &type); + + fattr->mode = be32_to_cpup(p++); + fattr->nlink = be32_to_cpup(p++); + fattr->uid = be32_to_cpup(p++); + fattr->gid = be32_to_cpup(p++); + fattr->size = be32_to_cpup(p++); + fattr->du.nfs2.blocksize = be32_to_cpup(p++); + + rdev = be32_to_cpup(p++); fattr->rdev = new_decode_dev(rdev); - if (type == NFCHR && rdev == NFS2_FIFO_DEV) { + if (type == (u32)NFCHR && rdev == (u32)NFS2_FIFO_DEV) { fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; fattr->rdev = 0; } + + fattr->du.nfs2.blocks = be32_to_cpup(p++); + fattr->fsid.major = be32_to_cpup(p++); + fattr->fsid.minor = 0; + fattr->fileid = be32_to_cpup(p++); + + p = xdr_decode_time(p, &fattr->atime); + p = xdr_decode_time(p, &fattr->mtime); + xdr_decode_time(p, &fattr->ctime); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * 2.3.6. sattr + * + * struct sattr { + * unsigned int mode; + * unsigned int uid; + * unsigned int gid; + * unsigned int size; + * timeval atime; + * timeval mtime; + * }; + */ + +#define NFS2_SATTR_NOT_SET (0xffffffff) + +static __be32 *xdr_time_not_set(__be32 *p) +{ + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); return p; } -static inline __be32 * -xdr_encode_sattr(__be32 *p, struct iattr *attr) +static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr) { - const __be32 not_set = __constant_htonl(0xFFFFFFFF); + __be32 *p; - *p++ = (attr->ia_valid & ATTR_MODE) ? htonl(attr->ia_mode) : not_set; - *p++ = (attr->ia_valid & ATTR_UID) ? htonl(attr->ia_uid) : not_set; - *p++ = (attr->ia_valid & ATTR_GID) ? htonl(attr->ia_gid) : not_set; - *p++ = (attr->ia_valid & ATTR_SIZE) ? htonl(attr->ia_size) : not_set; + p = xdr_reserve_space(xdr, NFS_sattr_sz << 2); - if (attr->ia_valid & ATTR_ATIME_SET) { + if (attr->ia_valid & ATTR_MODE) + *p++ = cpu_to_be32(attr->ia_mode); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_UID) + *p++ = cpu_to_be32(attr->ia_uid); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_GID) + *p++ = cpu_to_be32(attr->ia_gid); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + if (attr->ia_valid & ATTR_SIZE) + *p++ = cpu_to_be32((u32)attr->ia_size); + else + *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); + + if (attr->ia_valid & ATTR_ATIME_SET) p = xdr_encode_time(p, &attr->ia_atime); - } else if (attr->ia_valid & ATTR_ATIME) { + else if (attr->ia_valid & ATTR_ATIME) p = xdr_encode_current_server_time(p, &attr->ia_atime); - } else { - *p++ = not_set; - *p++ = not_set; - } - - if (attr->ia_valid & ATTR_MTIME_SET) { - p = xdr_encode_time(p, &attr->ia_mtime); - } else if (attr->ia_valid & ATTR_MTIME) { - p = xdr_encode_current_server_time(p, &attr->ia_mtime); - } else { - *p++ = not_set; - *p++ = not_set; - } - return p; + else + p = xdr_time_not_set(p); + if (attr->ia_valid & ATTR_MTIME_SET) + xdr_encode_time(p, &attr->ia_mtime); + else if (attr->ia_valid & ATTR_MTIME) + xdr_encode_current_server_time(p, &attr->ia_mtime); + else + xdr_time_not_set(p); } /* - * NFS encode functions + * 2.3.7. filename + * + * typedef string filename<MAXNAMLEN>; */ +static void encode_filename(struct xdr_stream *xdr, + const char *name, u32 length) +{ + __be32 *p; + + BUG_ON(length > NFS2_MAXNAMLEN); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, name, length); +} + +static int decode_filename_inline(struct xdr_stream *xdr, + const char **name, u32 *length) +{ + __be32 *p; + u32 count; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (count > NFS3_MAXNAMLEN) + goto out_nametoolong; + p = xdr_inline_decode(xdr, count); + if (unlikely(p == NULL)) + goto out_overflow; + *name = (const char *)p; + *length = count; + return 0; +out_nametoolong: + dprintk("NFS: returned filename too long: %u\n", count); + return -ENAMETOOLONG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + /* - * Encode file handle argument - * GETATTR, READLINK, STATFS + * 2.3.8. path + * + * typedef string path<MAXPATHLEN>; */ -static int -nfs_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh) +static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length) +{ + __be32 *p; + + BUG_ON(length > NFS2_MAXPATHLEN); + p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(length); + xdr_write_pages(xdr, pages, 0, length); +} + +static int decode_path(struct xdr_stream *xdr) { - p = xdr_encode_fhandle(p, fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + u32 length, recvd; + size_t hdrlen; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p); + if (unlikely(length >= xdr->buf->page_len || length > NFS_MAXPATHLEN)) + goto out_size; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(length > recvd)) + goto out_cheating; + + xdr_read_pages(xdr, length); + xdr_terminate_string(xdr->buf, length); return 0; +out_size: + dprintk("NFS: returned pathname too long: %u\n", length); + return -ENAMETOOLONG; +out_cheating: + dprintk("NFS: server cheating in pathname result: " + "length %u > received %u\n", length, recvd); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } /* - * Encode SETATTR arguments + * 2.3.9. attrstat + * + * union attrstat switch (stat status) { + * case NFS_OK: + * fattr attributes; + * default: + * void; + * }; */ -static int -nfs_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs_sattrargs *args) +static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_sattr(p, args->sattr); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_fattr(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Encode directory ops argument - * LOOKUP, RMDIR + * 2.3.10. diropargs + * + * struct diropargs { + * fhandle dir; + * filename name; + * }; */ -static int -nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args) +static void encode_diropargs(struct xdr_stream *xdr, const struct nfs_fh *fh, + const char *name, u32 length) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_fhandle(xdr, fh); + encode_filename(xdr, name, length); } /* - * Encode REMOVE argument + * 2.3.11. diropres + * + * union diropres switch (stat status) { + * case NFS_OK: + * struct { + * fhandle file; + * fattr attributes; + * } diropok; + * default: + * void; + * }; */ -static int -nfs_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) +static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name.name, args->name.len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + int error; + + error = decode_fhandle(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_fattr(xdr, result->fattr); +out: + return error; +} + +static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result) +{ + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_diropok(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } + /* - * Arguments to a READ call. Since we read data directly into the page - * cache, we also set up the reply iovec here so that iov[1] points - * exactly to the page we want to fetch. + * NFSv2 XDR encode functions + * + * NFSv2 argument types are defined in section 2.2 of RFC 1094: + * "NFS: Network File System Protocol Specification". */ -static int -nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) + +static void nfs2_xdr_enc_fhandle(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_fh *fh) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 offset = (u32)args->offset; + encode_fhandle(xdr, fh); +} + +/* + * 2.2.3. sattrargs + * + * struct sattrargs { + * fhandle file; + * sattr attributes; + * }; + */ +static void nfs2_xdr_enc_sattrargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_sattrargs *args) +{ + encode_fhandle(xdr, args->fh); + encode_sattr(xdr, args->sattr); +} + +static void nfs2_xdr_enc_diropargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_diropargs *args) +{ + encode_diropargs(xdr, args->fh, args->name, args->len); +} + +static void nfs2_xdr_enc_readlinkargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_readlinkargs *args) +{ + encode_fhandle(xdr, args->fh); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->pglen, NFS_readlinkres_sz); +} + +/* + * 2.2.7. readargs + * + * struct readargs { + * fhandle file; + * unsigned offset; + * unsigned count; + * unsigned totalcount; + * }; + */ +static void encode_readargs(struct xdr_stream *xdr, + const struct nfs_readargs *args) +{ + u32 offset = args->offset; u32 count = args->count; + __be32 *p; - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(offset); - *p++ = htonl(count); - *p++ = htonl(count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + encode_fhandle(xdr, args->fh); + + p = xdr_reserve_space(xdr, 4 + 4 + 4); + *p++ = cpu_to_be32(offset); + *p++ = cpu_to_be32(count); + *p = cpu_to_be32(count); +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, - args->pages, args->pgbase, count); +static void nfs2_xdr_enc_readargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_readargs *args) +{ + encode_readargs(xdr, args); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->count, NFS_readres_sz); req->rq_rcv_buf.flags |= XDRBUF_READ; - return 0; } /* - * Decode READ reply + * 2.2.9. writeargs + * + * struct writeargs { + * fhandle file; + * unsigned beginoffset; + * unsigned offset; + * unsigned totalcount; + * nfsdata data; + * }; */ -static int -nfs_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) +static void encode_writeargs(struct xdr_stream *xdr, + const struct nfs_writeargs *args) { - struct kvec *iov = req->rq_rcv_buf.head; - size_t hdrlen; - u32 count, recvd; - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - p = xdr_decode_fattr(p, res->fattr); - - count = ntohl(*p++); - res->eof = 0; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READ reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READ header is short. iovec will be shifted.\n"); - xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); - } + u32 offset = args->offset; + u32 count = args->count; + __be32 *p; - recvd = req->rq_rcv_buf.len - hdrlen; - if (count > recvd) { - dprintk("NFS: server cheating in read reply: " - "count %u > recvd %u\n", count, recvd); - count = recvd; - } + encode_fhandle(xdr, args->fh); - dprintk("RPC: readres OK count %u\n", count); - if (count < res->count) - res->count = count; + p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4); + *p++ = cpu_to_be32(offset); + *p++ = cpu_to_be32(offset); + *p++ = cpu_to_be32(count); - return count; + /* nfsdata */ + *p = cpu_to_be32(count); + xdr_write_pages(xdr, args->pages, args->pgbase, count); } +static void nfs2_xdr_enc_writeargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_writeargs *args) +{ + encode_writeargs(xdr, args); + xdr->buf->flags |= XDRBUF_WRITE; +} /* - * Write arguments. Splice the buffer to be written into the iovec. + * 2.2.10. createargs + * + * struct createargs { + * diropargs where; + * sattr attributes; + * }; */ -static int -nfs_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void nfs2_xdr_enc_createargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_createargs *args) { - struct xdr_buf *sndbuf = &req->rq_snd_buf; - u32 offset = (u32)args->offset; - u32 count = args->count; - - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(offset); - *p++ = htonl(offset); - *p++ = htonl(count); - *p++ = htonl(count); - sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); + encode_diropargs(xdr, args->fh, args->name, args->len); + encode_sattr(xdr, args->sattr); +} - /* Copy the page array */ - xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); - sndbuf->flags |= XDRBUF_WRITE; - return 0; +static void nfs2_xdr_enc_removeargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_removeargs *args) +{ + encode_diropargs(xdr, args->fh, args->name.name, args->name.len); } /* - * Encode create arguments - * CREATE, MKDIR + * 2.2.12. renameargs + * + * struct renameargs { + * diropargs from; + * diropargs to; + * }; */ -static int -nfs_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs_createargs *args) +static void nfs2_xdr_enc_renameargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_renameargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - p = xdr_encode_sattr(p, args->sattr); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + const struct qstr *old = args->old_name; + const struct qstr *new = args->new_name; + + encode_diropargs(xdr, args->old_dir, old->name, old->len); + encode_diropargs(xdr, args->new_dir, new->name, new->len); } /* - * Encode RENAME arguments + * 2.2.13. linkargs + * + * struct linkargs { + * fhandle from; + * diropargs to; + * }; */ -static int -nfs_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args) +static void nfs2_xdr_enc_linkargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_linkargs *args) { - p = xdr_encode_fhandle(p, args->old_dir); - p = xdr_encode_array(p, args->old_name->name, args->old_name->len); - p = xdr_encode_fhandle(p, args->new_dir); - p = xdr_encode_array(p, args->new_name->name, args->new_name->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_fhandle(xdr, args->fromfh); + encode_diropargs(xdr, args->tofh, args->toname, args->tolen); } /* - * Encode LINK arguments + * 2.2.14. symlinkargs + * + * struct symlinkargs { + * diropargs from; + * path to; + * sattr attributes; + * }; */ -static int -nfs_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs_linkargs *args) +static void nfs2_xdr_enc_symlinkargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_symlinkargs *args) { - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_fhandle(p, args->tofh); - p = xdr_encode_array(p, args->toname, args->tolen); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_diropargs(xdr, args->fromfh, args->fromname, args->fromlen); + encode_path(xdr, args->pages, args->pathlen); + encode_sattr(xdr, args->sattr); } /* - * Encode SYMLINK arguments + * 2.2.17. readdirargs + * + * struct readdirargs { + * fhandle dir; + * nfscookie cookie; + * unsigned count; + * }; */ -static int -nfs_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_symlinkargs *args) +static void encode_readdirargs(struct xdr_stream *xdr, + const struct nfs_readdirargs *args) { - struct xdr_buf *sndbuf = &req->rq_snd_buf; - size_t pad; + __be32 *p; - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_array(p, args->fromname, args->fromlen); - *p++ = htonl(args->pathlen); - sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); + encode_fhandle(xdr, args->fh); - xdr_encode_pages(sndbuf, args->pages, 0, args->pathlen); + p = xdr_reserve_space(xdr, 4 + 4); + *p++ = cpu_to_be32(args->cookie); + *p = cpu_to_be32(args->count); +} - /* - * xdr_encode_pages may have added a few bytes to ensure the - * pathname ends on a 4-byte boundary. Start encoding the - * attributes after the pad bytes. - */ - pad = sndbuf->tail->iov_len; - if (pad > 0) - p++; - p = xdr_encode_sattr(p, args->sattr); - sndbuf->len += xdr_adjust_iovec(sndbuf->tail, p) - pad; - return 0; +static void nfs2_xdr_enc_readdirargs(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_readdirargs *args) +{ + encode_readdirargs(xdr, args); + prepare_reply_buffer(req, args->pages, 0, + args->count, NFS_readdirres_sz); } /* - * Encode arguments to readdir call + * NFSv2 XDR decode functions + * + * NFSv2 result types are defined in section 2.2 of RFC 1094: + * "NFS: Network File System Protocol Specification". */ -static int -nfs_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs_readdirargs *args) + +static int nfs2_xdr_dec_stat(struct rpc_rqst *req, struct xdr_stream *xdr, + void *__unused) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 count = args->count; + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(args->cookie); - *p++ = htonl(count); /* see above */ - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); +static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_fattr *result) +{ + return decode_attrstat(xdr, result); +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); - return 0; +static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_diropok *result) +{ + return decode_diropres(xdr, result); } /* - * Decode the result of a readdir call. - * We're not really decoding anymore, we just leave the buffer untouched - * and only check that it is syntactically correct. - * The real decoding happens in nfs_decode_entry below, called directly - * from nfs_readdir for each entry. + * 2.2.6. readlinkres + * + * union readlinkres switch (stat status) { + * case NFS_OK: + * path data; + * default: + * void; + * }; */ -static int -nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy) +static int nfs2_xdr_dec_readlinkres(struct rpc_rqst *req, + struct xdr_stream *xdr, void *__unused) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - struct page **page; - size_t hdrlen; - unsigned int pglen, recvd; - int status, nr = 0; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READDIR reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_path(xdr); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} - pglen = rcvbuf->page_len; - recvd = rcvbuf->len - hdrlen; - if (pglen > recvd) - pglen = recvd; - page = rcvbuf->pages; - return nr; +/* + * 2.2.7. readres + * + * union readres switch (stat status) { + * case NFS_OK: + * fattr attributes; + * nfsdata data; + * default: + * void; + * }; + */ +static int nfs2_xdr_dec_readres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_readres *result) +{ + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_fattr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_nfsdata(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } -static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) +static int nfs2_xdr_dec_writeres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_writeres *result) { - dprintk("nfs: %s: prematurely hit end of receive buffer. " - "Remaining buffer length is %tu words.\n", - func, xdr->end - xdr->p); + /* All NFSv2 writes are "file sync" writes */ + result->verf->committed = NFS_FILE_SYNC; + return decode_attrstat(xdr, result->fattr); } -__be32 * -nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) +/** + * nfs2_decode_dirent - Decode a single NFSv2 directory entry stored in + * the local page cache. + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + * + * 2.2.17. entry + * + * struct entry { + * unsigned fileid; + * filename name; + * nfscookie cookie; + * entry *nextentry; + * }; + */ +int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) { __be32 *p; + int error; + p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) + if (unlikely(p == NULL)) goto out_overflow; - if (!ntohl(*p++)) { + if (*p++ == xdr_zero) { p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) + if (unlikely(p == NULL)) goto out_overflow; - if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); + if (*p++ == xdr_zero) + return -EAGAIN; entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); + return -EBADCOOKIE; } - p = xdr_inline_decode(xdr, 8); - if (unlikely(!p)) + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) goto out_overflow; + entry->ino = be32_to_cpup(p); - entry->ino = ntohl(*p++); - entry->len = ntohl(*p++); + error = decode_filename_inline(xdr, &entry->name, &entry->len); + if (unlikely(error)) + return error; - p = xdr_inline_decode(xdr, entry->len + 4); - if (unlikely(!p)) + /* + * The type (size and byte order) of nfscookie isn't defined in + * RFC 1094. This implementation assumes that it's an XDR uint32. + */ + entry->prev_cookie = entry->cookie; + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) goto out_overflow; - entry->name = (const char *) p; - p += XDR_QUADLEN(entry->len); - entry->prev_cookie = entry->cookie; - entry->cookie = ntohl(*p++); - - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; + entry->cookie = be32_to_cpup(p); - return p; + entry->d_type = DT_UNKNOWN; + + return 0; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); -} - -/* - * NFS XDR decode functions - */ -/* - * Decode simple status reply - */ -static int -nfs_xdr_stat(struct rpc_rqst *req, __be32 *p, void *dummy) -{ - int status; - - if ((status = ntohl(*p++)) != 0) - status = nfs_stat_to_errno(status); - return status; -} - -/* - * Decode attrstat reply - * GETATTR, SETATTR, WRITE - */ -static int -nfs_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) -{ - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - xdr_decode_fattr(p, fattr); - return 0; + return -EAGAIN; } /* - * Decode diropres reply - * LOOKUP, CREATE, MKDIR + * 2.2.17. readdirres + * + * union readdirres switch (stat status) { + * case NFS_OK: + * struct { + * entry *entries; + * bool eof; + * } readdirok; + * default: + * void; + * }; + * + * Read the directory contents into the page cache, but don't + * touch them. The actual decoding is done by nfs2_decode_dirent() + * during subsequent nfs_readdir() calls. */ -static int -nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res) +static int decode_readdirok(struct xdr_stream *xdr) { - int status; + u32 recvd, pglen; + size_t hdrlen; - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - p = xdr_decode_fhandle(p, res->fh); - xdr_decode_fattr(p, res->fattr); - return 0; + pglen = xdr->buf->page_len; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(pglen > recvd)) + goto out_cheating; +out: + xdr_read_pages(xdr, pglen); + return pglen; +out_cheating: + dprintk("NFS: server cheating in readdir result: " + "pglen %u > recvd %u\n", pglen, recvd); + pglen = recvd; + goto out; } -/* - * Encode READLINK args - */ -static int -nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args) +static int nfs2_xdr_dec_readdirres(struct rpc_rqst *req, + struct xdr_stream *xdr, void *__unused) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - - p = xdr_encode_fhandle(p, args->fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); - return 0; + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_readdirok(xdr); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Decode READLINK reply + * 2.2.18. statfsres + * + * union statfsres (stat status) { + * case NFS_OK: + * struct { + * unsigned tsize; + * unsigned bsize; + * unsigned blocks; + * unsigned bfree; + * unsigned bavail; + * } info; + * default: + * void; + * }; */ -static int -nfs_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, void *dummy) +static int decode_info(struct xdr_stream *xdr, struct nfs2_fsstat *result) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - size_t hdrlen; - u32 len, recvd; - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - /* Convert length of symlink */ - len = ntohl(*p++); - if (len >= rcvbuf->page_len) { - dprintk("nfs: server returned giant symlink!\n"); - return -ENAMETOOLONG; - } - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READLINK reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READLINK header is short. iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } - recvd = req->rq_rcv_buf.len - hdrlen; - if (recvd < len) { - dprintk("NFS: server cheating in readlink reply: " - "count %u > recvd %u\n", len, recvd); - return -EIO; - } + __be32 *p; - xdr_terminate_string(rcvbuf, len); + p = xdr_inline_decode(xdr, NFS_info_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + result->tsize = be32_to_cpup(p++); + result->bsize = be32_to_cpup(p++); + result->blocks = be32_to_cpup(p++); + result->bfree = be32_to_cpup(p++); + result->bavail = be32_to_cpup(p); return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } -/* - * Decode WRITE reply - */ -static int -nfs_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) +static int nfs2_xdr_dec_statfsres(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs2_fsstat *result) { - res->verf->committed = NFS_FILE_SYNC; - return nfs_xdr_attrstat(req, p, res->fattr); + enum nfs_stat status; + int error; + + error = decode_stat(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS_OK) + goto out_default; + error = decode_info(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } -/* - * Decode STATFS reply - */ -static int -nfs_xdr_statfsres(struct rpc_rqst *req, __be32 *p, struct nfs2_fsstat *res) -{ - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - - res->tsize = ntohl(*p++); - res->bsize = ntohl(*p++); - res->blocks = ntohl(*p++); - res->bfree = ntohl(*p++); - res->bavail = ntohl(*p++); - return 0; -} /* * We need to translate between nfs status return values and * the local errno values which may not be the same. */ -static struct { +static const struct { int stat; int errno; } nfs_errtbl[] = { @@ -676,28 +1102,30 @@ static struct { { -1, -EIO } }; -/* - * Convert an NFS error code to a local one. - * This one is used jointly by NFSv2 and NFSv3. +/** + * nfs_stat_to_errno - convert an NFS status code to a local errno + * @status: NFS status code to convert + * + * Returns a local errno value, or -EIO if the NFS status code is + * not recognized. This function is used jointly by NFSv2 and NFSv3. */ -int -nfs_stat_to_errno(int stat) +int nfs_stat_to_errno(enum nfs_stat status) { int i; for (i = 0; nfs_errtbl[i].stat != -1; i++) { - if (nfs_errtbl[i].stat == stat) + if (nfs_errtbl[i].stat == (int)status) return nfs_errtbl[i].errno; } - dprintk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat); + dprintk("NFS: Unrecognized nfs status value: %u\n", status); return nfs_errtbl[i].errno; } #define PROC(proc, argtype, restype, timer) \ [NFSPROC_##proc] = { \ .p_proc = NFSPROC_##proc, \ - .p_encode = (kxdrproc_t) nfs_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs_xdr_##restype, \ + .p_encode = (kxdreproc_t)nfs2_xdr_enc_##argtype, \ + .p_decode = (kxdrdproc_t)nfs2_xdr_dec_##restype, \ .p_arglen = NFS_##argtype##_sz, \ .p_replen = NFS_##restype##_sz, \ .p_timer = timer, \ @@ -705,21 +1133,21 @@ nfs_stat_to_errno(int stat) .p_name = #proc, \ } struct rpc_procinfo nfs_procedures[] = { - PROC(GETATTR, fhandle, attrstat, 1), - PROC(SETATTR, sattrargs, attrstat, 0), - PROC(LOOKUP, diropargs, diropres, 2), - PROC(READLINK, readlinkargs, readlinkres, 3), - PROC(READ, readargs, readres, 3), - PROC(WRITE, writeargs, writeres, 4), - PROC(CREATE, createargs, diropres, 0), - PROC(REMOVE, removeargs, stat, 0), - PROC(RENAME, renameargs, stat, 0), - PROC(LINK, linkargs, stat, 0), - PROC(SYMLINK, symlinkargs, stat, 0), - PROC(MKDIR, createargs, diropres, 0), - PROC(RMDIR, diropargs, stat, 0), - PROC(READDIR, readdirargs, readdirres, 3), - PROC(STATFS, fhandle, statfsres, 0), + PROC(GETATTR, fhandle, attrstat, 1), + PROC(SETATTR, sattrargs, attrstat, 0), + PROC(LOOKUP, diropargs, diropres, 2), + PROC(READLINK, readlinkargs, readlinkres, 3), + PROC(READ, readargs, readres, 3), + PROC(WRITE, writeargs, writeres, 4), + PROC(CREATE, createargs, diropres, 0), + PROC(REMOVE, removeargs, stat, 0), + PROC(RENAME, renameargs, stat, 0), + PROC(LINK, linkargs, stat, 0), + PROC(SYMLINK, symlinkargs, stat, 0), + PROC(MKDIR, createargs, diropres, 0), + PROC(RMDIR, diropargs, stat, 0), + PROC(READDIR, readdirargs, readdirres, 3), + PROC(STATFS, fhandle, statfsres, 0), }; struct rpc_version nfs_version2 = { diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index d9a5e83..01c5e8b 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -37,18 +37,16 @@ #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) #define NFS3_fattr_sz (21) -#define NFS3_wcc_attr_sz (6) +#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) +#define NFS3_wcc_attr_sz (6) #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) -#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) -#define NFS3_fsstat_sz -#define NFS3_fsinfo_sz -#define NFS3_pathconf_sz -#define NFS3_entry_sz (NFS3_filename_sz+3) - -#define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) +#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) -#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) + +#define NFS3_getattrargs_sz (NFS3_fh_sz) +#define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) +#define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_accessargs_sz (NFS3_fh_sz+1) #define NFS3_readlinkargs_sz (NFS3_fh_sz) #define NFS3_readargs_sz (NFS3_fh_sz+3) @@ -57,14 +55,16 @@ #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) +#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) -#define NFS3_readdirargs_sz (NFS3_fh_sz+2) +#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) +#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) #define NFS3_commitargs_sz (NFS3_fh_sz+3) -#define NFS3_attrstat_sz (1+NFS3_fattr_sz) -#define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) -#define NFS3_removeres_sz (NFS3_wccstat_sz) +#define NFS3_getattrres_sz (1+NFS3_fattr_sz) +#define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) +#define NFS3_removeres_sz (NFS3_setattrres_sz) #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) @@ -100,1077 +100,2362 @@ static const umode_t nfs_type2fmt[] = { [NF3FIFO] = S_IFIFO, }; +/* + * While encoding arguments, set up the reply buffer in advance to + * receive reply data directly into the page cache. + */ +static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, + unsigned int base, unsigned int len, + unsigned int bufsize) +{ + struct rpc_auth *auth = req->rq_cred->cr_auth; + unsigned int replen; + + replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; + xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); +} + +/* + * Handle decode buffer overflows out-of-line. + */ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) { - dprintk("nfs: %s: prematurely hit end of receive buffer. " + dprintk("NFS: %s prematurely hit the end of our receive buffer. " "Remaining buffer length is %tu words.\n", func, xdr->end - xdr->p); } + /* - * Common NFS XDR functions as inlines + * Encode/decode NFSv3 basic data types + * + * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: + * "NFS Version 3 Protocol Specification". + * + * Not all basic data types have their own encoding and decoding + * functions. For run-time efficiency, some data types are encoded + * or decoded inline. */ -static inline __be32 * -xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh) + +static void encode_uint32(struct xdr_stream *xdr, u32 value) { - return xdr_encode_array(p, fh->data, fh->size); + __be32 *p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(value); } -static inline __be32 * -xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh) +static int decode_uint32(struct xdr_stream *xdr, u32 *value) { - if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { - memcpy(fh->data, p, fh->size); - return p + XDR_QUADLEN(fh->size); - } - return NULL; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *value = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_uint64(struct xdr_stream *xdr, u64 *value) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 8); + if (unlikely(p == NULL)) + goto out_overflow; + xdr_decode_hyper(p, value); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * fileid3 + * + * typedef uint64 fileid3; + */ +static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) +{ + return xdr_decode_hyper(p, fileid); +} + +static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) +{ + return decode_uint64(xdr, fileid); +} + +/* + * filename3 + * + * typedef string filename3<>; + */ +static void encode_filename3(struct xdr_stream *xdr, + const char *name, u32 length) +{ + __be32 *p; + + BUG_ON(length > NFS3_MAXNAMLEN); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, name, length); } -static inline __be32 * -xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh) +static int decode_inline_filename3(struct xdr_stream *xdr, + const char **name, u32 *length) { __be32 *p; + u32 count; + p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (count > NFS3_MAXNAMLEN) + goto out_nametoolong; + p = xdr_inline_decode(xdr, count); + if (unlikely(p == NULL)) goto out_overflow; - fh->size = ntohl(*p++); + *name = (const char *)p; + *length = count; + return 0; - if (fh->size <= NFS3_FHSIZE) { - p = xdr_inline_decode(xdr, fh->size); - if (unlikely(!p)) - goto out_overflow; - memcpy(fh->data, p, fh->size); - return p + XDR_QUADLEN(fh->size); - } - return NULL; +out_nametoolong: + dprintk("NFS: returned filename too long: %u\n", count); + return -ENAMETOOLONG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * nfspath3 + * + * typedef string nfspath3<>; + */ +static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, + const u32 length) +{ + BUG_ON(length > NFS3_MAXPATHLEN); + encode_uint32(xdr, length); + xdr_write_pages(xdr, pages, 0, length); +} +static int decode_nfspath3(struct xdr_stream *xdr) +{ + u32 recvd, count; + size_t hdrlen; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) + goto out_nametoolong; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(count > recvd)) + goto out_cheating; + + xdr_read_pages(xdr, count); + xdr_terminate_string(xdr->buf, count); + return 0; + +out_nametoolong: + dprintk("NFS: returned pathname too long: %u\n", count); + return -ENAMETOOLONG; +out_cheating: + dprintk("NFS: server cheating in pathname result: " + "count %u > recvd %u\n", count, recvd); + return -EIO; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return -EIO; } /* - * Encode/decode time. + * cookie3 + * + * typedef uint64 cookie3 */ -static inline __be32 * -xdr_encode_time3(__be32 *p, struct timespec *timep) +static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) { - *p++ = htonl(timep->tv_sec); - *p++ = htonl(timep->tv_nsec); - return p; + return xdr_encode_hyper(p, cookie); } -static inline __be32 * -xdr_decode_time3(__be32 *p, struct timespec *timep) +static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) { - timep->tv_sec = ntohl(*p++); - timep->tv_nsec = ntohl(*p++); - return p; + return decode_uint64(xdr, cookie); } -static __be32 * -xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) +/* + * cookieverf3 + * + * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; + */ +static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) +{ + memcpy(p, verifier, NFS3_COOKIEVERFSIZE); + return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); +} + +static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + memcpy(verifier, p, NFS3_COOKIEVERFSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * createverf3 + * + * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; + */ +static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) { - unsigned int type, major, minor; - umode_t fmode; + __be32 *p; + + p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); + memcpy(p, verifier, NFS3_CREATEVERFSIZE); +} + +static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + memcpy(verifier, p, NFS3_WRITEVERFSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * size3 + * + * typedef uint64 size3; + */ +static __be32 *xdr_decode_size3(__be32 *p, u64 *size) +{ + return xdr_decode_hyper(p, size); +} + +/* + * nfsstat3 + * + * enum nfsstat3 { + * NFS3_OK = 0, + * ... + * } + */ +#define NFS3_OK NFS_OK - type = ntohl(*p++); +static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *status = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * ftype3 + * + * enum ftype3 { + * NF3REG = 1, + * NF3DIR = 2, + * NF3BLK = 3, + * NF3CHR = 4, + * NF3LNK = 5, + * NF3SOCK = 6, + * NF3FIFO = 7 + * }; + */ +static void encode_ftype3(struct xdr_stream *xdr, const u32 type) +{ + BUG_ON(type > NF3FIFO); + encode_uint32(xdr, type); +} + +static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) +{ + u32 type; + + type = be32_to_cpup(p++); if (type > NF3FIFO) type = NF3NON; - fmode = nfs_type2fmt[type]; - fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; - fattr->nlink = ntohl(*p++); - fattr->uid = ntohl(*p++); - fattr->gid = ntohl(*p++); - p = xdr_decode_hyper(p, &fattr->size); - p = xdr_decode_hyper(p, &fattr->du.nfs3.used); - - /* Turn remote device info into Linux-specific dev_t */ - major = ntohl(*p++); - minor = ntohl(*p++); - fattr->rdev = MKDEV(major, minor); - if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) - fattr->rdev = 0; + *mode = nfs_type2fmt[type]; + return p; +} - p = xdr_decode_hyper(p, &fattr->fsid.major); - fattr->fsid.minor = 0; - p = xdr_decode_hyper(p, &fattr->fileid); - p = xdr_decode_time3(p, &fattr->atime); - p = xdr_decode_time3(p, &fattr->mtime); - p = xdr_decode_time3(p, &fattr->ctime); +/* + * specdata3 + * + * struct specdata3 { + * uint32 specdata1; + * uint32 specdata2; + * }; + */ +static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) +{ + __be32 *p; - /* Update the mode bits */ - fattr->valid |= NFS_ATTR_FATTR_V3; + p = xdr_reserve_space(xdr, 8); + *p++ = cpu_to_be32(MAJOR(rdev)); + *p = cpu_to_be32(MINOR(rdev)); +} + +static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) +{ + unsigned int major, minor; + + major = be32_to_cpup(p++); + minor = be32_to_cpup(p++); + *rdev = MKDEV(major, minor); + if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) + *rdev = 0; + return p; +} + +/* + * nfs_fh3 + * + * struct nfs_fh3 { + * opaque data<NFS3_FHSIZE>; + * }; + */ +static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) +{ + __be32 *p; + + BUG_ON(fh->size > NFS3_FHSIZE); + p = xdr_reserve_space(xdr, 4 + fh->size); + xdr_encode_opaque(p, fh->data, fh->size); +} + +static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + if (unlikely(length > NFS3_FHSIZE)) + goto out_toobig; + p = xdr_inline_decode(xdr, length); + if (unlikely(p == NULL)) + goto out_overflow; + fh->size = length; + memcpy(fh->data, p, length); + return 0; +out_toobig: + dprintk("NFS: file handle size (%u) too big\n", length); + return -E2BIG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static void zero_nfs_fh3(struct nfs_fh *fh) +{ + memset(fh, 0, sizeof(*fh)); +} + +/* + * nfstime3 + * + * struct nfstime3 { + * uint32 seconds; + * uint32 nseconds; + * }; + */ +static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) +{ + *p++ = cpu_to_be32(timep->tv_sec); + *p++ = cpu_to_be32(timep->tv_nsec); return p; } -static inline __be32 * -xdr_encode_sattr(__be32 *p, struct iattr *attr) +static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) { + timep->tv_sec = be32_to_cpup(p++); + timep->tv_nsec = be32_to_cpup(p++); + return p; +} + +/* + * sattr3 + * + * enum time_how { + * DONT_CHANGE = 0, + * SET_TO_SERVER_TIME = 1, + * SET_TO_CLIENT_TIME = 2 + * }; + * + * union set_mode3 switch (bool set_it) { + * case TRUE: + * mode3 mode; + * default: + * void; + * }; + * + * union set_uid3 switch (bool set_it) { + * case TRUE: + * uid3 uid; + * default: + * void; + * }; + * + * union set_gid3 switch (bool set_it) { + * case TRUE: + * gid3 gid; + * default: + * void; + * }; + * + * union set_size3 switch (bool set_it) { + * case TRUE: + * size3 size; + * default: + * void; + * }; + * + * union set_atime switch (time_how set_it) { + * case SET_TO_CLIENT_TIME: + * nfstime3 atime; + * default: + * void; + * }; + * + * union set_mtime switch (time_how set_it) { + * case SET_TO_CLIENT_TIME: + * nfstime3 mtime; + * default: + * void; + * }; + * + * struct sattr3 { + * set_mode3 mode; + * set_uid3 uid; + * set_gid3 gid; + * set_size3 size; + * set_atime atime; + * set_mtime mtime; + * }; + */ +static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) +{ + u32 nbytes; + __be32 *p; + + /* + * In order to make only a single xdr_reserve_space() call, + * pre-compute the total number of bytes to be reserved. + * Six boolean values, one for each set_foo field, are always + * present in the encoded result, so start there. + */ + nbytes = 6 * 4; + if (attr->ia_valid & ATTR_MODE) + nbytes += 4; + if (attr->ia_valid & ATTR_UID) + nbytes += 4; + if (attr->ia_valid & ATTR_GID) + nbytes += 4; + if (attr->ia_valid & ATTR_SIZE) + nbytes += 8; + if (attr->ia_valid & ATTR_ATIME_SET) + nbytes += 8; + if (attr->ia_valid & ATTR_MTIME_SET) + nbytes += 8; + p = xdr_reserve_space(xdr, nbytes); + if (attr->ia_valid & ATTR_MODE) { *p++ = xdr_one; - *p++ = htonl(attr->ia_mode & S_IALLUGO); - } else { + *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_UID) { *p++ = xdr_one; - *p++ = htonl(attr->ia_uid); - } else { + *p++ = cpu_to_be32(attr->ia_uid); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_GID) { *p++ = xdr_one; - *p++ = htonl(attr->ia_gid); - } else { + *p++ = cpu_to_be32(attr->ia_gid); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_SIZE) { *p++ = xdr_one; - p = xdr_encode_hyper(p, (__u64) attr->ia_size); - } else { + p = xdr_encode_hyper(p, (u64)attr->ia_size); + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_ATIME_SET) { *p++ = xdr_two; - p = xdr_encode_time3(p, &attr->ia_atime); + p = xdr_encode_nfstime3(p, &attr->ia_atime); } else if (attr->ia_valid & ATTR_ATIME) { *p++ = xdr_one; - } else { + } else *p++ = xdr_zero; - } + if (attr->ia_valid & ATTR_MTIME_SET) { *p++ = xdr_two; - p = xdr_encode_time3(p, &attr->ia_mtime); + xdr_encode_nfstime3(p, &attr->ia_mtime); } else if (attr->ia_valid & ATTR_MTIME) { - *p++ = xdr_one; - } else { - *p++ = xdr_zero; - } - return p; + *p = xdr_one; + } else + *p = xdr_zero; } -static inline __be32 * -xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) +/* + * fattr3 + * + * struct fattr3 { + * ftype3 type; + * mode3 mode; + * uint32 nlink; + * uid3 uid; + * gid3 gid; + * size3 size; + * size3 used; + * specdata3 rdev; + * uint64 fsid; + * fileid3 fileid; + * nfstime3 atime; + * nfstime3 mtime; + * nfstime3 ctime; + * }; + */ +static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) { - p = xdr_decode_hyper(p, &fattr->pre_size); - p = xdr_decode_time3(p, &fattr->pre_mtime); - p = xdr_decode_time3(p, &fattr->pre_ctime); + umode_t fmode; + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + + p = xdr_decode_ftype3(p, &fmode); + + fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; + fattr->nlink = be32_to_cpup(p++); + fattr->uid = be32_to_cpup(p++); + fattr->gid = be32_to_cpup(p++); + + p = xdr_decode_size3(p, &fattr->size); + p = xdr_decode_size3(p, &fattr->du.nfs3.used); + p = xdr_decode_specdata3(p, &fattr->rdev); + + p = xdr_decode_hyper(p, &fattr->fsid.major); + fattr->fsid.minor = 0; + + p = xdr_decode_fileid3(p, &fattr->fileid); + p = xdr_decode_nfstime3(p, &fattr->atime); + p = xdr_decode_nfstime3(p, &fattr->mtime); + xdr_decode_nfstime3(p, &fattr->ctime); + + fattr->valid |= NFS_ATTR_FATTR_V3; + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * post_op_attr + * + * union post_op_attr switch (bool attributes_follow) { + * case TRUE: + * fattr3 attributes; + * case FALSE: + * void; + * }; + */ +static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_fattr3(xdr, fattr); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * wcc_attr + * struct wcc_attr { + * size3 size; + * nfstime3 mtime; + * nfstime3 ctime; + * }; + */ +static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + fattr->valid |= NFS_ATTR_FATTR_PRESIZE | NFS_ATTR_FATTR_PREMTIME | NFS_ATTR_FATTR_PRECTIME; - return p; -} -static inline __be32 * -xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr) -{ - if (*p++) - p = xdr_decode_fattr(p, fattr); - return p; + p = xdr_decode_size3(p, &fattr->pre_size); + p = xdr_decode_nfstime3(p, &fattr->pre_mtime); + xdr_decode_nfstime3(p, &fattr->pre_ctime); + + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } -static inline __be32 * -xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr) +/* + * pre_op_attr + * union pre_op_attr switch (bool attributes_follow) { + * case TRUE: + * wcc_attr attributes; + * case FALSE: + * void; + * }; + * + * wcc_data + * + * struct wcc_data { + * pre_op_attr before; + * post_op_attr after; + * }; + */ +static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) { __be32 *p; p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) + if (unlikely(p == NULL)) goto out_overflow; - if (ntohl(*p++)) { - p = xdr_inline_decode(xdr, 84); - if (unlikely(!p)) - goto out_overflow; - p = xdr_decode_fattr(p, fattr); - } - return p; + if (*p != xdr_zero) + return decode_wcc_attr(xdr, fattr); + return 0; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return -EIO; } -static inline __be32 * -xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr) +static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) { - if (*p++) - return xdr_decode_wcc_attr(p, fattr); - return p; + int error; + + error = decode_pre_op_attr(xdr, fattr); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, fattr); +out: + return error; } +/* + * post_op_fh3 + * + * union post_op_fh3 switch (bool handle_follows) { + * case TRUE: + * nfs_fh3 handle; + * case FALSE: + * void; + * }; + */ +static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) +{ + __be32 *p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_nfs_fh3(xdr, fh); + zero_nfs_fh3(fh); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} -static inline __be32 * -xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr) +/* + * diropargs3 + * + * struct diropargs3 { + * nfs_fh3 dir; + * filename3 name; + * }; + */ +static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, + const char *name, u32 length) { - p = xdr_decode_pre_op_attr(p, fattr); - return xdr_decode_post_op_attr(p, fattr); + encode_nfs_fh3(xdr, fh); + encode_filename3(xdr, name, length); } + /* - * NFS encode functions + * NFSv3 XDR encode functions + * + * NFSv3 argument types are defined in section 3.3 of RFC 1813: + * "NFS Version 3 Protocol Specification". */ /* - * Encode file handle argument + * 3.3.1 GETATTR3args + * + * struct GETATTR3args { + * nfs_fh3 object; + * }; */ -static int -nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh) +static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_fh *fh) { - p = xdr_encode_fhandle(p, fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_nfs_fh3(xdr, fh); } /* - * Encode SETATTR arguments + * 3.3.2 SETATTR3args + * + * union sattrguard3 switch (bool check) { + * case TRUE: + * nfstime3 obj_ctime; + * case FALSE: + * void; + * }; + * + * struct SETATTR3args { + * nfs_fh3 object; + * sattr3 new_attributes; + * sattrguard3 guard; + * }; */ -static int -nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args) -{ - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_sattr(p, args->sattr); - *p++ = htonl(args->guard); - if (args->guard) - p = xdr_encode_time3(p, &args->guardtime); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void encode_sattrguard3(struct xdr_stream *xdr, + const struct nfs3_sattrargs *args) +{ + __be32 *p; + + if (args->guard) { + p = xdr_reserve_space(xdr, 4 + 8); + *p++ = xdr_one; + xdr_encode_nfstime3(p, &args->guardtime); + } else { + p = xdr_reserve_space(xdr, 4); + *p = xdr_zero; + } +} + +static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_sattrargs *args) +{ + encode_nfs_fh3(xdr, args->fh); + encode_sattr3(xdr, args->sattr); + encode_sattrguard3(xdr, args); } /* - * Encode directory ops argument + * 3.3.3 LOOKUP3args + * + * struct LOOKUP3args { + * diropargs3 what; + * }; */ -static int -nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args) +static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_diropargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_diropargs3(xdr, args->fh, args->name, args->len); } /* - * Encode REMOVE argument + * 3.3.4 ACCESS3args + * + * struct ACCESS3args { + * nfs_fh3 object; + * uint32 access; + * }; */ -static int -nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) +static void encode_access3args(struct xdr_stream *xdr, + const struct nfs3_accessargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name.name, args->name.len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_nfs_fh3(xdr, args->fh); + encode_uint32(xdr, args->access); +} + +static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_accessargs *args) +{ + encode_access3args(xdr, args); } /* - * Encode access() argument + * 3.3.5 READLINK3args + * + * struct READLINK3args { + * nfs_fh3 symlink; + * }; */ -static int -nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args) +static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_readlinkargs *args) { - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(args->access); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_nfs_fh3(xdr, args->fh); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->pglen, NFS3_readlinkres_sz); } /* - * Arguments to a READ call. Since we read data directly into the page - * cache, we also set up the reply iovec here so that iov[1] points - * exactly to the page we want to fetch. + * 3.3.6 READ3args + * + * struct READ3args { + * nfs_fh3 file; + * offset3 offset; + * count3 count; + * }; */ -static int -nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) +static void encode_read3args(struct xdr_stream *xdr, + const struct nfs_readargs *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 count = args->count; + __be32 *p; + + encode_nfs_fh3(xdr, args->fh); - p = xdr_encode_fhandle(p, args->fh); + p = xdr_reserve_space(xdr, 8 + 4); p = xdr_encode_hyper(p, args->offset); - *p++ = htonl(count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + *p = cpu_to_be32(args->count); +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, - args->pages, args->pgbase, count); +static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_readargs *args) +{ + encode_read3args(xdr, args); + prepare_reply_buffer(req, args->pages, args->pgbase, + args->count, NFS3_readres_sz); req->rq_rcv_buf.flags |= XDRBUF_READ; - return 0; } /* - * Write arguments. Splice the buffer to be written into the iovec. + * 3.3.7 WRITE3args + * + * enum stable_how { + * UNSTABLE = 0, + * DATA_SYNC = 1, + * FILE_SYNC = 2 + * }; + * + * struct WRITE3args { + * nfs_fh3 file; + * offset3 offset; + * count3 count; + * stable_how stable; + * opaque data<>; + * }; */ -static int -nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void encode_write3args(struct xdr_stream *xdr, + const struct nfs_writeargs *args) { - struct xdr_buf *sndbuf = &req->rq_snd_buf; - u32 count = args->count; + __be32 *p; + + encode_nfs_fh3(xdr, args->fh); - p = xdr_encode_fhandle(p, args->fh); + p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); p = xdr_encode_hyper(p, args->offset); - *p++ = htonl(count); - *p++ = htonl(args->stable); - *p++ = htonl(count); - sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); - - /* Copy the page array */ - xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); - sndbuf->flags |= XDRBUF_WRITE; - return 0; + *p++ = cpu_to_be32(args->count); + *p++ = cpu_to_be32(args->stable); + *p = cpu_to_be32(args->count); + xdr_write_pages(xdr, args->pages, args->pgbase, args->count); +} + +static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_writeargs *args) +{ + encode_write3args(xdr, args); + xdr->buf->flags |= XDRBUF_WRITE; } /* - * Encode CREATE arguments + * 3.3.8 CREATE3args + * + * enum createmode3 { + * UNCHECKED = 0, + * GUARDED = 1, + * EXCLUSIVE = 2 + * }; + * + * union createhow3 switch (createmode3 mode) { + * case UNCHECKED: + * case GUARDED: + * sattr3 obj_attributes; + * case EXCLUSIVE: + * createverf3 verf; + * }; + * + * struct CREATE3args { + * diropargs3 where; + * createhow3 how; + * }; */ -static int -nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args) +static void encode_createhow3(struct xdr_stream *xdr, + const struct nfs3_createargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - - *p++ = htonl(args->createmode); - if (args->createmode == NFS3_CREATE_EXCLUSIVE) { - *p++ = args->verifier[0]; - *p++ = args->verifier[1]; - } else - p = xdr_encode_sattr(p, args->sattr); + encode_uint32(xdr, args->createmode); + switch (args->createmode) { + case NFS3_CREATE_UNCHECKED: + case NFS3_CREATE_GUARDED: + encode_sattr3(xdr, args->sattr); + break; + case NFS3_CREATE_EXCLUSIVE: + encode_createverf3(xdr, args->verifier); + break; + default: + BUG(); + } +} - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_createargs *args) +{ + encode_diropargs3(xdr, args->fh, args->name, args->len); + encode_createhow3(xdr, args); } /* - * Encode MKDIR arguments + * 3.3.9 MKDIR3args + * + * struct MKDIR3args { + * diropargs3 where; + * sattr3 attributes; + * }; */ -static int -nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args) +static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_mkdirargs *args) { - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - p = xdr_encode_sattr(p, args->sattr); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + encode_diropargs3(xdr, args->fh, args->name, args->len); + encode_sattr3(xdr, args->sattr); } /* - * Encode SYMLINK arguments + * 3.3.10 SYMLINK3args + * + * struct symlinkdata3 { + * sattr3 symlink_attributes; + * nfspath3 symlink_data; + * }; + * + * struct SYMLINK3args { + * diropargs3 where; + * symlinkdata3 symlink; + * }; */ -static int -nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args) +static void encode_symlinkdata3(struct xdr_stream *xdr, + const struct nfs3_symlinkargs *args) { - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_array(p, args->fromname, args->fromlen); - p = xdr_encode_sattr(p, args->sattr); - *p++ = htonl(args->pathlen); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + encode_sattr3(xdr, args->sattr); + encode_nfspath3(xdr, args->pages, args->pathlen); +} - /* Copy the page */ - xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen); - return 0; +static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_symlinkargs *args) +{ + encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); + encode_symlinkdata3(xdr, args); } /* - * Encode MKNOD arguments + * 3.3.11 MKNOD3args + * + * struct devicedata3 { + * sattr3 dev_attributes; + * specdata3 spec; + * }; + * + * union mknoddata3 switch (ftype3 type) { + * case NF3CHR: + * case NF3BLK: + * devicedata3 device; + * case NF3SOCK: + * case NF3FIFO: + * sattr3 pipe_attributes; + * default: + * void; + * }; + * + * struct MKNOD3args { + * diropargs3 where; + * mknoddata3 what; + * }; */ -static int -nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args) -{ - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_array(p, args->name, args->len); - *p++ = htonl(args->type); - p = xdr_encode_sattr(p, args->sattr); - if (args->type == NF3CHR || args->type == NF3BLK) { - *p++ = htonl(MAJOR(args->rdev)); - *p++ = htonl(MINOR(args->rdev)); +static void encode_devicedata3(struct xdr_stream *xdr, + const struct nfs3_mknodargs *args) +{ + encode_sattr3(xdr, args->sattr); + encode_specdata3(xdr, args->rdev); +} + +static void encode_mknoddata3(struct xdr_stream *xdr, + const struct nfs3_mknodargs *args) +{ + encode_ftype3(xdr, args->type); + switch (args->type) { + case NF3CHR: + case NF3BLK: + encode_devicedata3(xdr, args); + break; + case NF3SOCK: + case NF3FIFO: + encode_sattr3(xdr, args->sattr); + break; + case NF3REG: + case NF3DIR: + break; + default: + BUG(); } +} - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_mknodargs *args) +{ + encode_diropargs3(xdr, args->fh, args->name, args->len); + encode_mknoddata3(xdr, args); } /* - * Encode RENAME arguments + * 3.3.12 REMOVE3args + * + * struct REMOVE3args { + * diropargs3 object; + * }; */ -static int -nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args) -{ - p = xdr_encode_fhandle(p, args->old_dir); - p = xdr_encode_array(p, args->old_name->name, args->old_name->len); - p = xdr_encode_fhandle(p, args->new_dir); - p = xdr_encode_array(p, args->new_name->name, args->new_name->len); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; +static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_removeargs *args) +{ + encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); } /* - * Encode LINK arguments + * 3.3.14 RENAME3args + * + * struct RENAME3args { + * diropargs3 from; + * diropargs3 to; + * }; */ -static int -nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args) +static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_renameargs *args) { - p = xdr_encode_fhandle(p, args->fromfh); - p = xdr_encode_fhandle(p, args->tofh); - p = xdr_encode_array(p, args->toname, args->tolen); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + const struct qstr *old = args->old_name; + const struct qstr *new = args->new_name; + + encode_diropargs3(xdr, args->old_dir, old->name, old->len); + encode_diropargs3(xdr, args->new_dir, new->name, new->len); } /* - * Encode arguments to readdir call + * 3.3.15 LINK3args + * + * struct LINK3args { + * nfs_fh3 file; + * diropargs3 link; + * }; */ -static int -nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args) +static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_linkargs *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; - u32 count = args->count; - - p = xdr_encode_fhandle(p, args->fh); - p = xdr_encode_hyper(p, args->cookie); - *p++ = args->verf[0]; - *p++ = args->verf[1]; - if (args->plus) { - /* readdirplus: need dircount + buffer size. - * We just make sure we make dircount big enough */ - *p++ = htonl(count >> 3); - } - *p++ = htonl(count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); - return 0; + encode_nfs_fh3(xdr, args->fromfh); + encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); } /* - * Decode the result of a readdir call. - * We just check for syntactical correctness. + * 3.3.16 READDIR3args + * + * struct READDIR3args { + * nfs_fh3 dir; + * cookie3 cookie; + * cookieverf3 cookieverf; + * count3 count; + * }; */ -static int -nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res) +static void encode_readdir3args(struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - struct page **page; - size_t hdrlen; - u32 recvd, pglen; - int status, nr = 0; - - status = ntohl(*p++); - /* Decode post_op_attrs */ - p = xdr_decode_post_op_attr(p, res->dir_attr); - if (status) - return nfs_stat_to_errno(status); - /* Decode verifier cookie */ - if (res->verf) { - res->verf[0] = *p++; - res->verf[1] = *p++; - } else { - p += 2; - } + __be32 *p; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READDIR reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } + encode_nfs_fh3(xdr, args->fh); - pglen = rcvbuf->page_len; - recvd = rcvbuf->len - hdrlen; - if (pglen > recvd) - pglen = recvd; - page = rcvbuf->pages; + p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); + p = xdr_encode_cookie3(p, args->cookie); + p = xdr_encode_cookieverf3(p, args->verf); + *p = cpu_to_be32(args->count); +} - return nr; +static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) +{ + encode_readdir3args(xdr, args); + prepare_reply_buffer(req, args->pages, 0, + args->count, NFS3_readdirres_sz); } -__be32 * -nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) +/* + * 3.3.17 READDIRPLUS3args + * + * struct READDIRPLUS3args { + * nfs_fh3 dir; + * cookie3 cookie; + * cookieverf3 cookieverf; + * count3 dircount; + * count3 maxcount; + * }; + */ +static void encode_readdirplus3args(struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) { __be32 *p; - struct nfs_entry old = *entry; - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) { - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); - entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); - } + encode_nfs_fh3(xdr, args->fh); - p = xdr_inline_decode(xdr, 12); - if (unlikely(!p)) - goto out_overflow; - p = xdr_decode_hyper(p, &entry->ino); - entry->len = ntohl(*p++); - - p = xdr_inline_decode(xdr, entry->len + 8); - if (unlikely(!p)) - goto out_overflow; - entry->name = (const char *) p; - p += XDR_QUADLEN(entry->len); - entry->prev_cookie = entry->cookie; - p = xdr_decode_hyper(p, &entry->cookie); - - if (plus) { - entry->fattr->valid = 0; - p = xdr_decode_post_op_attr_stream(xdr, entry->fattr); - if (IS_ERR(p)) - goto out_overflow_exit; - /* In fact, a post_op_fh3: */ - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (*p++) { - p = xdr_decode_fhandle_stream(xdr, entry->fh); - if (IS_ERR(p)) - goto out_overflow_exit; - /* Ugh -- server reply was truncated */ - if (p == NULL) { - dprintk("NFS: FH truncated\n"); - *entry = old; - return ERR_PTR(-EAGAIN); - } - } else - memset((u8*)(entry->fh), 0, sizeof(*entry->fh)); - } + p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); + p = xdr_encode_cookie3(p, args->cookie); + p = xdr_encode_cookieverf3(p, args->verf); - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; + /* + * readdirplus: need dircount + buffer size. + * We just make sure we make dircount big enough + */ + *p++ = cpu_to_be32(args->count >> 3); - return p; + *p = cpu_to_be32(args->count); +} -out_overflow: - print_overflow_msg(__func__, xdr); -out_overflow_exit: - return ERR_PTR(-EIO); +static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_readdirargs *args) +{ + encode_readdirplus3args(xdr, args); + prepare_reply_buffer(req, args->pages, 0, + args->count, NFS3_readdirres_sz); } /* - * Encode COMMIT arguments + * 3.3.21 COMMIT3args + * + * struct COMMIT3args { + * nfs_fh3 file; + * offset3 offset; + * count3 count; + * }; */ -static int -nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void encode_commit3args(struct xdr_stream *xdr, + const struct nfs_writeargs *args) { - p = xdr_encode_fhandle(p, args->fh); + __be32 *p; + + encode_nfs_fh3(xdr, args->fh); + + p = xdr_reserve_space(xdr, 8 + 4); p = xdr_encode_hyper(p, args->offset); - *p++ = htonl(args->count); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - return 0; + *p = cpu_to_be32(args->count); } -#ifdef CONFIG_NFS_V3_ACL -/* - * Encode GETACL arguments - */ -static int -nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p, - struct nfs3_getaclargs *args) +static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs_writeargs *args) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; + encode_commit3args(xdr, args); +} - p = xdr_encode_fhandle(p, args->fh); - *p++ = htonl(args->mask); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); +#ifdef CONFIG_NFS_V3_ACL - if (args->mask & (NFS_ACL | NFS_DFACL)) { - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + - ACL3_getaclres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, - NFSACL_MAXPAGES << PAGE_SHIFT); - } - return 0; +static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_getaclargs *args) +{ + encode_nfs_fh3(xdr, args->fh); + encode_uint32(xdr, args->mask); + if (args->mask & (NFS_ACL | NFS_DFACL)) + prepare_reply_buffer(req, args->pages, 0, + NFSACL_MAXPAGES << PAGE_SHIFT, + ACL3_getaclres_sz); } -/* - * Encode SETACL arguments - */ -static int -nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p, - struct nfs3_setaclargs *args) +static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs3_setaclargs *args) { - struct xdr_buf *buf = &req->rq_snd_buf; unsigned int base; - int err; - - p = xdr_encode_fhandle(p, NFS_FH(args->inode)); - *p++ = htonl(args->mask); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); - base = req->rq_slen; + int error; + encode_nfs_fh3(xdr, NFS_FH(args->inode)); + encode_uint32(xdr, args->mask); if (args->npages != 0) - xdr_encode_pages(buf, args->pages, 0, args->len); - else - req->rq_slen = xdr_adjust_iovec(req->rq_svec, - p + XDR_QUADLEN(args->len)); + xdr_write_pages(xdr, args->pages, 0, args->len); - err = nfsacl_encode(buf, base, args->inode, + base = req->rq_slen; + error = nfsacl_encode(xdr->buf, base, args->inode, (args->mask & NFS_ACL) ? args->acl_access : NULL, 1, 0); - if (err > 0) - err = nfsacl_encode(buf, base + err, args->inode, - (args->mask & NFS_DFACL) ? - args->acl_default : NULL, 1, - NFS_ACL_DEFAULT); - return (err > 0) ? 0 : err; + BUG_ON(error < 0); + error = nfsacl_encode(xdr->buf, base + error, args->inode, + (args->mask & NFS_DFACL) ? + args->acl_default : NULL, 1, + NFS_ACL_DEFAULT); + BUG_ON(error < 0); } + #endif /* CONFIG_NFS_V3_ACL */ /* - * NFS XDR decode functions + * NFSv3 XDR decode functions + * + * NFSv3 result types are defined in section 3.3 of RFC 1813: + * "NFS Version 3 Protocol Specification". */ /* - * Decode attrstat reply. + * 3.3.1 GETATTR3res + * + * struct GETATTR3resok { + * fattr3 obj_attributes; + * }; + * + * union GETATTR3res switch (nfsstat3 status) { + * case NFS3_OK: + * GETATTR3resok resok; + * default: + * void; + * }; */ -static int -nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) { - int status; - - if ((status = ntohl(*p++))) - return nfs_stat_to_errno(status); - xdr_decode_fattr(p, fattr); - return 0; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_fattr3(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Decode status+wcc_data reply - * SATTR, REMOVE, RMDIR + * 3.3.2 SETATTR3res + * + * struct SETATTR3resok { + * wcc_data obj_wcc; + * }; + * + * struct SETATTR3resfail { + * wcc_data obj_wcc; + * }; + * + * union SETATTR3res switch (nfsstat3 status) { + * case NFS3_OK: + * SETATTR3resok resok; + * default: + * SETATTR3resfail resfail; + * }; */ -static int -nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) { - int status; - - if ((status = ntohl(*p++))) - status = nfs_stat_to_errno(status); - xdr_decode_wcc_data(p, fattr); - return status; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); } -static int -nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) +/* + * 3.3.3 LOOKUP3res + * + * struct LOOKUP3resok { + * nfs_fh3 object; + * post_op_attr obj_attributes; + * post_op_attr dir_attributes; + * }; + * + * struct LOOKUP3resfail { + * post_op_attr dir_attributes; + * }; + * + * union LOOKUP3res switch (nfsstat3 status) { + * case NFS3_OK: + * LOOKUP3resok resok; + * default: + * LOOKUP3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_diropres *result) { - return nfs3_xdr_wccstat(req, p, res->dir_attr); + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_nfs_fh3(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->dir_attr); +out: + return error; +out_default: + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs_stat_to_errno(status); } /* - * Decode LOOKUP reply + * 3.3.4 ACCESS3res + * + * struct ACCESS3resok { + * post_op_attr obj_attributes; + * uint32 access; + * }; + * + * struct ACCESS3resfail { + * post_op_attr obj_attributes; + * }; + * + * union ACCESS3res switch (nfsstat3 status) { + * case NFS3_OK: + * ACCESS3resok resok; + * default: + * ACCESS3resfail resfail; + * }; */ -static int -nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) +static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_accessres *result) { - int status; - - if ((status = ntohl(*p++))) { - status = nfs_stat_to_errno(status); - } else { - if (!(p = xdr_decode_fhandle(p, res->fh))) - return -errno_NFSERR_IO; - p = xdr_decode_post_op_attr(p, res->fattr); - } - xdr_decode_post_op_attr(p, res->dir_attr); - return status; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_uint32(xdr, &result->access); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } /* - * Decode ACCESS reply + * 3.3.5 READLINK3res + * + * struct READLINK3resok { + * post_op_attr symlink_attributes; + * nfspath3 data; + * }; + * + * struct READLINK3resfail { + * post_op_attr symlink_attributes; + * }; + * + * union READLINK3res switch (nfsstat3 status) { + * case NFS3_OK: + * READLINK3resok resok; + * default: + * READLINK3resfail resfail; + * }; */ -static int -nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) +static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) { - int status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status) - return nfs_stat_to_errno(status); - res->access = ntohl(*p++); - return 0; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_nfspath3(xdr); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } -static int -nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args) +/* + * 3.3.6 READ3res + * + * struct READ3resok { + * post_op_attr file_attributes; + * count3 count; + * bool eof; + * opaque data<>; + * }; + * + * struct READ3resfail { + * post_op_attr file_attributes; + * }; + * + * union READ3res switch (nfsstat3 status) { + * case NFS3_OK: + * READ3resok resok; + * default: + * READ3resfail resfail; + * }; + */ +static int decode_read3resok(struct xdr_stream *xdr, + struct nfs_readres *result) { - struct rpc_auth *auth = req->rq_cred->cr_auth; - unsigned int replen; + u32 eof, count, ocount, recvd; + size_t hdrlen; + __be32 *p; - p = xdr_encode_fhandle(p, args->fh); - req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); + p = xdr_inline_decode(xdr, 4 + 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p++); + eof = be32_to_cpup(p++); + ocount = be32_to_cpup(p++); + if (unlikely(ocount != count)) + goto out_mismatch; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(count > recvd)) + goto out_cheating; + +out: + xdr_read_pages(xdr, count); + result->eof = eof; + result->count = count; + return count; +out_mismatch: + dprintk("NFS: READ count doesn't match length of opaque: " + "count %u != ocount %u\n", count, ocount); + return -EIO; +out_cheating: + dprintk("NFS: server cheating in read result: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + eof = 0; + goto out; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} - /* Inline the page array */ - replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2; - xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); - return 0; +static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_readres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_read3resok(xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); } /* - * Decode READLINK reply + * 3.3.7 WRITE3res + * + * enum stable_how { + * UNSTABLE = 0, + * DATA_SYNC = 1, + * FILE_SYNC = 2 + * }; + * + * struct WRITE3resok { + * wcc_data file_wcc; + * count3 count; + * stable_how committed; + * writeverf3 verf; + * }; + * + * struct WRITE3resfail { + * wcc_data file_wcc; + * }; + * + * union WRITE3res switch (nfsstat3 status) { + * case NFS3_OK: + * WRITE3resok resok; + * default: + * WRITE3resfail resfail; + * }; */ -static int -nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int decode_write3resok(struct xdr_stream *xdr, + struct nfs_writeres *result) { - struct xdr_buf *rcvbuf = &req->rq_rcv_buf; - struct kvec *iov = rcvbuf->head; - size_t hdrlen; - u32 len, recvd; - int status; - - status = ntohl(*p++); - p = xdr_decode_post_op_attr(p, fattr); - - if (status != 0) - return nfs_stat_to_errno(status); - - /* Convert length of symlink */ - len = ntohl(*p++); - if (len >= rcvbuf->page_len) { - dprintk("nfs: server returned giant symlink!\n"); - return -ENAMETOOLONG; - } + __be32 *p; - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READLINK reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READLINK header is short. " - "iovec will be shifted.\n"); - xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); - } - recvd = req->rq_rcv_buf.len - hdrlen; - if (recvd < len) { - dprintk("NFS: server cheating in readlink reply: " - "count %u > recvd %u\n", len, recvd); - return -EIO; - } + p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + result->count = be32_to_cpup(p++); + result->verf->committed = be32_to_cpup(p++); + if (unlikely(result->verf->committed > NFS_FILE_SYNC)) + goto out_badvalue; + memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); + return result->count; +out_badvalue: + dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} - xdr_terminate_string(rcvbuf, len); - return 0; +static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_writeres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_write3resok(xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); } /* - * Decode READ reply + * 3.3.8 CREATE3res + * + * struct CREATE3resok { + * post_op_fh3 obj; + * post_op_attr obj_attributes; + * wcc_data dir_wcc; + * }; + * + * struct CREATE3resfail { + * wcc_data dir_wcc; + * }; + * + * union CREATE3res switch (nfsstat3 status) { + * case NFS3_OK: + * CREATE3resok resok; + * default: + * CREATE3resfail resfail; + * }; */ -static int -nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) +static int decode_create3resok(struct xdr_stream *xdr, + struct nfs3_diropres *result) { - struct kvec *iov = req->rq_rcv_buf.head; - size_t hdrlen; - u32 count, ocount, recvd; - int status; + int error; + + error = decode_post_op_fh3(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + /* The server isn't required to return a file handle. + * If it didn't, force the client to perform a LOOKUP + * to determine the correct file handle and attribute + * values for the new object. */ + if (result->fh->size == 0) + result->fattr->valid = 0; + error = decode_wcc_data(xdr, result->dir_attr); +out: + return error; +} - status = ntohl(*p++); - p = xdr_decode_post_op_attr(p, res->fattr); +static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_diropres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_create3resok(xdr, result); +out: + return error; +out_default: + error = decode_wcc_data(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs_stat_to_errno(status); +} - if (status != 0) - return nfs_stat_to_errno(status); +/* + * 3.3.12 REMOVE3res + * + * struct REMOVE3resok { + * wcc_data dir_wcc; + * }; + * + * struct REMOVE3resfail { + * wcc_data dir_wcc; + * }; + * + * union REMOVE3res switch (nfsstat3 status) { + * case NFS3_OK: + * REMOVE3resok resok; + * default: + * REMOVE3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_removeres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} - /* Decode reply count and EOF flag. NFSv3 is somewhat redundant - * in that it puts the count both in the res struct and in the - * opaque data count. */ - count = ntohl(*p++); - res->eof = ntohl(*p++); - ocount = ntohl(*p++); +/* + * 3.3.14 RENAME3res + * + * struct RENAME3resok { + * wcc_data fromdir_wcc; + * wcc_data todir_wcc; + * }; + * + * struct RENAME3resfail { + * wcc_data fromdir_wcc; + * wcc_data todir_wcc; + * }; + * + * union RENAME3res switch (nfsstat3 status) { + * case NFS3_OK: + * RENAME3resok resok; + * default: + * RENAME3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_renameres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->old_fattr); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->new_fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} - if (ocount != count) { - dprintk("NFS: READ count doesn't match RPC opaque count.\n"); - return -errno_NFSERR_IO; - } +/* + * 3.3.15 LINK3res + * + * struct LINK3resok { + * post_op_attr file_attributes; + * wcc_data linkdir_wcc; + * }; + * + * struct LINK3resfail { + * post_op_attr file_attributes; + * wcc_data linkdir_wcc; + * }; + * + * union LINK3res switch (nfsstat3 status) { + * case NFS3_OK: + * LINK3resok resok; + * default: + * LINK3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs3_linkres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} - hdrlen = (u8 *) p - (u8 *) iov->iov_base; - if (iov->iov_len < hdrlen) { - dprintk("NFS: READ reply header overflowed:" - "length %Zu > %Zu\n", hdrlen, iov->iov_len); - return -errno_NFSERR_IO; - } else if (iov->iov_len != hdrlen) { - dprintk("NFS: READ header is short. iovec will be shifted.\n"); - xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); - } +/** + * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in + * the local page cache + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + * + * 3.3.16 entry3 + * + * struct entry3 { + * fileid3 fileid; + * filename3 name; + * cookie3 cookie; + * fhandle3 filehandle; + * post_op_attr3 attributes; + * entry3 *nextentry; + * }; + * + * 3.3.17 entryplus3 + * struct entryplus3 { + * fileid3 fileid; + * filename3 name; + * cookie3 cookie; + * post_op_attr name_attributes; + * post_op_fh3 name_handle; + * entryplus3 *nextentry; + * }; + */ +int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) +{ + struct nfs_entry old = *entry; + __be32 *p; + int error; - recvd = req->rq_rcv_buf.len - hdrlen; - if (count > recvd) { - dprintk("NFS: server cheating in read reply: " - "count %u > recvd %u\n", count, recvd); - count = recvd; - res->eof = 0; + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p == xdr_zero) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p == xdr_zero) + return -EAGAIN; + entry->eof = 1; + return -EBADCOOKIE; } - if (count < res->count) - res->count = count; + error = decode_fileid3(xdr, &entry->ino); + if (unlikely(error)) + return error; - return count; -} + error = decode_inline_filename3(xdr, &entry->name, &entry->len); + if (unlikely(error)) + return error; -/* - * Decode WRITE response - */ -static int -nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) -{ - int status; + entry->prev_cookie = entry->cookie; + error = decode_cookie3(xdr, &entry->cookie); + if (unlikely(error)) + return error; - status = ntohl(*p++); - p = xdr_decode_wcc_data(p, res->fattr); + entry->d_type = DT_UNKNOWN; - if (status != 0) - return nfs_stat_to_errno(status); + if (plus) { + entry->fattr->valid = 0; + error = decode_post_op_attr(xdr, entry->fattr); + if (unlikely(error)) + return error; + if (entry->fattr->valid & NFS_ATTR_FATTR_V3) + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); - res->count = ntohl(*p++); - res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); - res->verf->verifier[0] = *p++; - res->verf->verifier[1] = *p++; + /* In fact, a post_op_fh3: */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) { + error = decode_nfs_fh3(xdr, entry->fh); + if (unlikely(error)) { + if (error == -E2BIG) + goto out_truncated; + return error; + } + } else + zero_nfs_fh3(entry->fh); + } - return res->count; -} + return 0; -/* - * Decode a CREATE response - */ -static int -nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) -{ - int status; - - status = ntohl(*p++); - if (status == 0) { - if (*p++) { - if (!(p = xdr_decode_fhandle(p, res->fh))) - return -errno_NFSERR_IO; - p = xdr_decode_post_op_attr(p, res->fattr); - } else { - memset(res->fh, 0, sizeof(*res->fh)); - /* Do decode post_op_attr but set it to NULL */ - p = xdr_decode_post_op_attr(p, res->fattr); - res->fattr->valid = 0; - } - } else { - status = nfs_stat_to_errno(status); - } - p = xdr_decode_wcc_data(p, res->dir_attr); - return status; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EAGAIN; +out_truncated: + dprintk("NFS: directory entry contains invalid file handle\n"); + *entry = old; + return -EAGAIN; } /* - * Decode RENAME reply + * 3.3.16 READDIR3res + * + * struct dirlist3 { + * entry3 *entries; + * bool eof; + * }; + * + * struct READDIR3resok { + * post_op_attr dir_attributes; + * cookieverf3 cookieverf; + * dirlist3 reply; + * }; + * + * struct READDIR3resfail { + * post_op_attr dir_attributes; + * }; + * + * union READDIR3res switch (nfsstat3 status) { + * case NFS3_OK: + * READDIR3resok resok; + * default: + * READDIR3resfail resfail; + * }; + * + * Read the directory contents into the page cache, but otherwise + * don't touch them. The actual decoding is done by nfs3_decode_entry() + * during subsequent nfs_readdir() calls. */ -static int -nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res) +static int decode_dirlist3(struct xdr_stream *xdr) { - int status; + u32 recvd, pglen; + size_t hdrlen; - if ((status = ntohl(*p++)) != 0) - status = nfs_stat_to_errno(status); - p = xdr_decode_wcc_data(p, res->old_fattr); - p = xdr_decode_wcc_data(p, res->new_fattr); - return status; + pglen = xdr->buf->page_len; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(pglen > recvd)) + goto out_cheating; +out: + xdr_read_pages(xdr, pglen); + return pglen; +out_cheating: + dprintk("NFS: server cheating in readdir result: " + "pglen %u > recvd %u\n", pglen, recvd); + pglen = recvd; + goto out; } -/* - * Decode LINK reply - */ -static int -nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) +static int decode_readdir3resok(struct xdr_stream *xdr, + struct nfs3_readdirres *result) { - int status; + int error; + + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + /* XXX: do we need to check if result->verf != NULL ? */ + error = decode_cookieverf3(xdr, result->verf); + if (unlikely(error)) + goto out; + error = decode_dirlist3(xdr); +out: + return error; +} - if ((status = ntohl(*p++)) != 0) - status = nfs_stat_to_errno(status); - p = xdr_decode_post_op_attr(p, res->fattr); - p = xdr_decode_wcc_data(p, res->dir_attr); - return status; +static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_readdirres *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_readdir3resok(xdr, result); +out: + return error; +out_default: + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs_stat_to_errno(status); } /* - * Decode FSSTAT reply + * 3.3.18 FSSTAT3res + * + * struct FSSTAT3resok { + * post_op_attr obj_attributes; + * size3 tbytes; + * size3 fbytes; + * size3 abytes; + * size3 tfiles; + * size3 ffiles; + * size3 afiles; + * uint32 invarsec; + * }; + * + * struct FSSTAT3resfail { + * post_op_attr obj_attributes; + * }; + * + * union FSSTAT3res switch (nfsstat3 status) { + * case NFS3_OK: + * FSSTAT3resok resok; + * default: + * FSSTAT3resfail resfail; + * }; */ -static int -nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) +static int decode_fsstat3resok(struct xdr_stream *xdr, + struct nfs_fsstat *result) { - int status; - - status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); - - p = xdr_decode_hyper(p, &res->tbytes); - p = xdr_decode_hyper(p, &res->fbytes); - p = xdr_decode_hyper(p, &res->abytes); - p = xdr_decode_hyper(p, &res->tfiles); - p = xdr_decode_hyper(p, &res->ffiles); - p = xdr_decode_hyper(p, &res->afiles); + __be32 *p; + p = xdr_inline_decode(xdr, 8 * 6 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + p = xdr_decode_size3(p, &result->tbytes); + p = xdr_decode_size3(p, &result->fbytes); + p = xdr_decode_size3(p, &result->abytes); + p = xdr_decode_size3(p, &result->tfiles); + p = xdr_decode_size3(p, &result->ffiles); + xdr_decode_size3(p, &result->afiles); /* ignore invarsec */ return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fsstat *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_fsstat3resok(xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); } /* - * Decode FSINFO reply + * 3.3.19 FSINFO3res + * + * struct FSINFO3resok { + * post_op_attr obj_attributes; + * uint32 rtmax; + * uint32 rtpref; + * uint32 rtmult; + * uint32 wtmax; + * uint32 wtpref; + * uint32 wtmult; + * uint32 dtpref; + * size3 maxfilesize; + * nfstime3 time_delta; + * uint32 properties; + * }; + * + * struct FSINFO3resfail { + * post_op_attr obj_attributes; + * }; + * + * union FSINFO3res switch (nfsstat3 status) { + * case NFS3_OK: + * FSINFO3resok resok; + * default: + * FSINFO3resfail resfail; + * }; */ -static int -nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) +static int decode_fsinfo3resok(struct xdr_stream *xdr, + struct nfs_fsinfo *result) { - int status; - - status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); + __be32 *p; - res->rtmax = ntohl(*p++); - res->rtpref = ntohl(*p++); - res->rtmult = ntohl(*p++); - res->wtmax = ntohl(*p++); - res->wtpref = ntohl(*p++); - res->wtmult = ntohl(*p++); - res->dtpref = ntohl(*p++); - p = xdr_decode_hyper(p, &res->maxfilesize); - p = xdr_decode_time3(p, &res->time_delta); + p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + result->rtmax = be32_to_cpup(p++); + result->rtpref = be32_to_cpup(p++); + result->rtmult = be32_to_cpup(p++); + result->wtmax = be32_to_cpup(p++); + result->wtpref = be32_to_cpup(p++); + result->wtmult = be32_to_cpup(p++); + result->dtpref = be32_to_cpup(p++); + p = xdr_decode_size3(p, &result->maxfilesize); + xdr_decode_nfstime3(p, &result->time_delta); /* ignore properties */ - res->lease_time = 0; + result->lease_time = 0; return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fsinfo *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_fsinfo3resok(xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); } /* - * Decode PATHCONF reply + * 3.3.20 PATHCONF3res + * + * struct PATHCONF3resok { + * post_op_attr obj_attributes; + * uint32 linkmax; + * uint32 name_max; + * bool no_trunc; + * bool chown_restricted; + * bool case_insensitive; + * bool case_preserving; + * }; + * + * struct PATHCONF3resfail { + * post_op_attr obj_attributes; + * }; + * + * union PATHCONF3res switch (nfsstat3 status) { + * case NFS3_OK: + * PATHCONF3resok resok; + * default: + * PATHCONF3resfail resfail; + * }; */ -static int -nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res) +static int decode_pathconf3resok(struct xdr_stream *xdr, + struct nfs_pathconf *result) { - int status; - - status = ntohl(*p++); - - p = xdr_decode_post_op_attr(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); - res->max_link = ntohl(*p++); - res->max_namelen = ntohl(*p++); + __be32 *p; + p = xdr_inline_decode(xdr, 4 * 6); + if (unlikely(p == NULL)) + goto out_overflow; + result->max_link = be32_to_cpup(p++); + result->max_namelen = be32_to_cpup(p); /* ignore remaining fields */ return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_pathconf *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_pathconf3resok(xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); } /* - * Decode COMMIT reply + * 3.3.21 COMMIT3res + * + * struct COMMIT3resok { + * wcc_data file_wcc; + * writeverf3 verf; + * }; + * + * struct COMMIT3resfail { + * wcc_data file_wcc; + * }; + * + * union COMMIT3res switch (nfsstat3 status) { + * case NFS3_OK: + * COMMIT3resok resok; + * default: + * COMMIT3resfail resfail; + * }; */ -static int -nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) +static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_writeres *result) { - int status; - - status = ntohl(*p++); - p = xdr_decode_wcc_data(p, res->fattr); - if (status != 0) - return nfs_stat_to_errno(status); - - res->verf->verifier[0] = *p++; - res->verf->verifier[1] = *p++; - return 0; + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_writeverf3(xdr, result->verf->verifier); +out: + return error; +out_status: + return nfs_stat_to_errno(status); } #ifdef CONFIG_NFS_V3_ACL -/* - * Decode GETACL reply - */ -static int -nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, - struct nfs3_getaclres *res) + +static inline int decode_getacl3resok(struct xdr_stream *xdr, + struct nfs3_getaclres *result) { - struct xdr_buf *buf = &req->rq_rcv_buf; - int status = ntohl(*p++); struct posix_acl **acl; unsigned int *aclcnt; - int err, base; - - if (status != 0) - return nfs_stat_to_errno(status); - p = xdr_decode_post_op_attr(p, res->fattr); - res->mask = ntohl(*p++); - if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) - return -EINVAL; - base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base; - - acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL; - aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL; - err = nfsacl_decode(buf, base, aclcnt, acl); - - acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL; - aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL; - if (err > 0) - err = nfsacl_decode(buf, base + err, aclcnt, acl); - return (err > 0) ? 0 : err; + size_t hdrlen; + int error; + + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_uint32(xdr, &result->mask); + if (unlikely(error)) + goto out; + error = -EINVAL; + if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) + goto out; + + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + + acl = NULL; + if (result->mask & NFS_ACL) + acl = &result->acl_access; + aclcnt = NULL; + if (result->mask & NFS_ACLCNT) + aclcnt = &result->acl_access_count; + error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); + if (unlikely(error <= 0)) + goto out; + + acl = NULL; + if (result->mask & NFS_DFACL) + acl = &result->acl_default; + aclcnt = NULL; + if (result->mask & NFS_DFACLCNT) + aclcnt = &result->acl_default_count; + error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); + if (unlikely(error <= 0)) + return error; + error = 0; +out: + return error; } -/* - * Decode setacl reply. - */ -static int -nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) +static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs3_getaclres *result) { - int status = ntohl(*p++); + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_getacl3resok(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} - if (status) - return nfs_stat_to_errno(status); - xdr_decode_post_op_attr(p, fattr); - return 0; +static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fattr *result) +{ + enum nfs_stat status; + int error; + + error = decode_nfsstat3(xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_post_op_attr(xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); } + #endif /* CONFIG_NFS_V3_ACL */ #define PROC(proc, argtype, restype, timer) \ [NFS3PROC_##proc] = { \ .p_proc = NFS3PROC_##proc, \ - .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ - .p_arglen = NFS3_##argtype##_sz, \ - .p_replen = NFS3_##restype##_sz, \ + .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \ + .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \ + .p_arglen = NFS3_##argtype##args_sz, \ + .p_replen = NFS3_##restype##res_sz, \ .p_timer = timer, \ .p_statidx = NFS3PROC_##proc, \ .p_name = #proc, \ } struct rpc_procinfo nfs3_procedures[] = { - PROC(GETATTR, fhandle, attrstat, 1), - PROC(SETATTR, sattrargs, wccstat, 0), - PROC(LOOKUP, diropargs, lookupres, 2), - PROC(ACCESS, accessargs, accessres, 1), - PROC(READLINK, readlinkargs, readlinkres, 3), - PROC(READ, readargs, readres, 3), - PROC(WRITE, writeargs, writeres, 4), - PROC(CREATE, createargs, createres, 0), - PROC(MKDIR, mkdirargs, createres, 0), - PROC(SYMLINK, symlinkargs, createres, 0), - PROC(MKNOD, mknodargs, createres, 0), - PROC(REMOVE, removeargs, removeres, 0), - PROC(RMDIR, diropargs, wccstat, 0), - PROC(RENAME, renameargs, renameres, 0), - PROC(LINK, linkargs, linkres, 0), - PROC(READDIR, readdirargs, readdirres, 3), - PROC(READDIRPLUS, readdirargs, readdirres, 3), - PROC(FSSTAT, fhandle, fsstatres, 0), - PROC(FSINFO, fhandle, fsinfores, 0), - PROC(PATHCONF, fhandle, pathconfres, 0), - PROC(COMMIT, commitargs, commitres, 5), + PROC(GETATTR, getattr, getattr, 1), + PROC(SETATTR, setattr, setattr, 0), + PROC(LOOKUP, lookup, lookup, 2), + PROC(ACCESS, access, access, 1), + PROC(READLINK, readlink, readlink, 3), + PROC(READ, read, read, 3), + PROC(WRITE, write, write, 4), + PROC(CREATE, create, create, 0), + PROC(MKDIR, mkdir, create, 0), + PROC(SYMLINK, symlink, create, 0), + PROC(MKNOD, mknod, create, 0), + PROC(REMOVE, remove, remove, 0), + PROC(RMDIR, lookup, setattr, 0), + PROC(RENAME, rename, rename, 0), + PROC(LINK, link, link, 0), + PROC(READDIR, readdir, readdir, 3), + PROC(READDIRPLUS, readdirplus, readdir, 3), + PROC(FSSTAT, getattr, fsstat, 0), + PROC(FSINFO, getattr, fsinfo, 0), + PROC(PATHCONF, getattr, pathconf, 0), + PROC(COMMIT, commit, commit, 5), }; struct rpc_version nfs_version3 = { @@ -1183,8 +2468,8 @@ struct rpc_version nfs_version3 = { static struct rpc_procinfo nfs3_acl_procedures[] = { [ACLPROC3_GETACL] = { .p_proc = ACLPROC3_GETACL, - .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs, - .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, + .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args, + .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res, .p_arglen = ACL3_getaclargs_sz, .p_replen = ACL3_getaclres_sz, .p_timer = 1, @@ -1192,8 +2477,8 @@ static struct rpc_procinfo nfs3_acl_procedures[] = { }, [ACLPROC3_SETACL] = { .p_proc = ACLPROC3_SETACL, - .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs, - .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, + .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args, + .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res, .p_arglen = ACL3_setaclargs_sz, .p_replen = ACL3_setaclres_sz, .p_timer = 0, diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 9fa4963..7a74740 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -44,6 +44,7 @@ enum nfs4_client_state { NFS4CLNT_RECLAIM_REBOOT, NFS4CLNT_RECLAIM_NOGRACE, NFS4CLNT_DELEGRETURN, + NFS4CLNT_LAYOUTRECALL, NFS4CLNT_SESSION_RESET, NFS4CLNT_RECALL_SLOT, }; @@ -109,7 +110,7 @@ struct nfs_unique_id { struct nfs4_state_owner { struct nfs_unique_id so_owner_id; struct nfs_server *so_server; - struct rb_node so_client_node; + struct rb_node so_server_node; struct rpc_cred *so_cred; /* Associated cred */ @@ -227,12 +228,6 @@ struct nfs4_state_maintenance_ops { extern const struct dentry_operations nfs4_dentry_operations; extern const struct inode_operations nfs4_dir_inode_operations; -/* inode.c */ -extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t); -extern int nfs4_setxattr(struct dentry *, const char *, const void *, size_t, int); -extern ssize_t nfs4_listxattr(struct dentry *, char *, size_t); - - /* nfs4proc.c */ extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *); extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *); @@ -241,11 +236,12 @@ extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *); extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *); extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *); extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *); -extern int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait); +extern int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc); extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle); extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, struct nfs4_fs_locations *fs_locations, struct page *page); extern void nfs4_release_lockowner(const struct nfs4_lock_state *); +extern const struct xattr_handler *nfs4_xattr_handlers[]; #if defined(CONFIG_NFS_V4_1) static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server) @@ -331,7 +327,6 @@ extern void nfs_free_seqid(struct nfs_seqid *seqid); extern const nfs4_stateid zero_stateid; /* nfs4xdr.c */ -extern __be32 *nfs4_decode_dirent(struct xdr_stream *, struct nfs_entry *, struct nfs_server *, int); extern struct rpc_procinfo nfs4_procedures[]; struct nfs4_mount_data; diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index 2e92f0d..23f930c 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -82,7 +82,7 @@ filelayout_check_layout(struct pnfs_layout_hdr *lo, { struct nfs4_file_layout_dsaddr *dsaddr; int status = -EINVAL; - struct nfs_server *nfss = NFS_SERVER(lo->inode); + struct nfs_server *nfss = NFS_SERVER(lo->plh_inode); dprintk("--> %s\n", __func__); @@ -101,7 +101,7 @@ filelayout_check_layout(struct pnfs_layout_hdr *lo, /* find and reference the deviceid */ dsaddr = nfs4_fl_find_get_deviceid(nfss->nfs_client, id); if (dsaddr == NULL) { - dsaddr = get_device_info(lo->inode, id); + dsaddr = get_device_info(lo->plh_inode, id); if (dsaddr == NULL) goto out; } @@ -243,7 +243,7 @@ filelayout_alloc_lseg(struct pnfs_layout_hdr *layoutid, static void filelayout_free_lseg(struct pnfs_layout_segment *lseg) { - struct nfs_server *nfss = NFS_SERVER(lseg->layout->inode); + struct nfs_server *nfss = NFS_SERVER(lseg->pls_layout->plh_inode); struct nfs4_filelayout_segment *fl = FILELAYOUT_LSEG(lseg); dprintk("--> %s\n", __func__); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 32c8758..9d992b0 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -49,6 +49,7 @@ #include <linux/mount.h> #include <linux/module.h> #include <linux/sunrpc/bc_xprt.h> +#include <linux/xattr.h> #include "nfs4_fs.h" #include "delegation.h" @@ -355,9 +356,9 @@ nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot) } /* - * Signal state manager thread if session is drained + * Signal state manager thread if session fore channel is drained */ -static void nfs41_check_drain_session_complete(struct nfs4_session *ses) +static void nfs4_check_drain_fc_complete(struct nfs4_session *ses) { struct rpc_task *task; @@ -371,8 +372,20 @@ static void nfs41_check_drain_session_complete(struct nfs4_session *ses) if (ses->fc_slot_table.highest_used_slotid != -1) return; - dprintk("%s COMPLETE: Session Drained\n", __func__); - complete(&ses->complete); + dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__); + complete(&ses->fc_slot_table.complete); +} + +/* + * Signal state manager thread if session back channel is drained + */ +void nfs4_check_drain_bc_complete(struct nfs4_session *ses) +{ + if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) || + ses->bc_slot_table.highest_used_slotid != -1) + return; + dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__); + complete(&ses->bc_slot_table.complete); } static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) @@ -389,7 +402,7 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) spin_lock(&tbl->slot_tbl_lock); nfs4_free_slot(tbl, res->sr_slot); - nfs41_check_drain_session_complete(res->sr_session); + nfs4_check_drain_fc_complete(res->sr_session); spin_unlock(&tbl->slot_tbl_lock); res->sr_slot = NULL; } @@ -429,7 +442,7 @@ static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res * * returned NFS4ERR_DELAY as per Section 2.10.6.2 * of RFC5661. */ - dprintk("%s: slot=%ld seq=%d: Operation in progress\n", + dprintk("%s: slot=%td seq=%d: Operation in progress\n", __func__, res->sr_slot - res->sr_session->fc_slot_table.slots, res->sr_slot->seq_nr); @@ -573,7 +586,7 @@ int nfs4_setup_sequence(const struct nfs_server *server, goto out; } - dprintk("--> %s clp %p session %p sr_slot %ld\n", + dprintk("--> %s clp %p session %p sr_slot %td\n", __func__, session->clp, session, res->sr_slot ? res->sr_slot - session->fc_slot_table.slots : -1); @@ -1826,6 +1839,8 @@ struct nfs4_closedata { struct nfs_closeres res; struct nfs_fattr fattr; unsigned long timestamp; + bool roc; + u32 roc_barrier; }; static void nfs4_free_closedata(void *data) @@ -1833,6 +1848,8 @@ static void nfs4_free_closedata(void *data) struct nfs4_closedata *calldata = data; struct nfs4_state_owner *sp = calldata->state->owner; + if (calldata->roc) + pnfs_roc_release(calldata->state->inode); nfs4_put_open_state(calldata->state); nfs_free_seqid(calldata->arg.seqid); nfs4_put_state_owner(sp); @@ -1865,6 +1882,9 @@ static void nfs4_close_done(struct rpc_task *task, void *data) */ switch (task->tk_status) { case 0: + if (calldata->roc) + pnfs_roc_set_barrier(state->inode, + calldata->roc_barrier); nfs_set_open_stateid(state, &calldata->res.stateid, 0); renew_lease(server, calldata->timestamp); nfs4_close_clear_stateid_flags(state, @@ -1917,8 +1937,15 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data) return; } - if (calldata->arg.fmode == 0) + if (calldata->arg.fmode == 0) { task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; + if (calldata->roc && + pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) { + rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq, + task, NULL); + return; + } + } nfs_fattr_init(calldata->res.fattr); calldata->timestamp = jiffies; @@ -1946,7 +1973,7 @@ static const struct rpc_call_ops nfs4_close_ops = { * * NOTE: Caller must be holding the sp->so_owner semaphore! */ -int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait) +int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc) { struct nfs_server *server = NFS_SERVER(state->inode); struct nfs4_closedata *calldata; @@ -1981,11 +2008,12 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, i calldata->res.fattr = &calldata->fattr; calldata->res.seqid = calldata->arg.seqid; calldata->res.server = server; + calldata->roc = roc; path_get(path); calldata->path = *path; - msg.rpc_argp = &calldata->arg, - msg.rpc_resp = &calldata->res, + msg.rpc_argp = &calldata->arg; + msg.rpc_resp = &calldata->res; task_setup_data.callback_data = calldata; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) @@ -1998,6 +2026,8 @@ int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, i out_free_calldata: kfree(calldata); out: + if (roc) + pnfs_roc_release(state->inode); nfs4_put_open_state(state); nfs4_put_state_owner(sp); return status; @@ -2486,6 +2516,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, path = &ctx->path; fmode = ctx->mode; } + sattr->ia_mode &= ~current_umask(); state = nfs4_do_open(dir, path, fmode, flags, sattr, cred); d_drop(dentry); if (IS_ERR(state)) { @@ -2816,6 +2847,8 @@ static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, { struct nfs4_exception exception = { }; int err; + + sattr->ia_mode &= ~current_umask(); do { err = nfs4_handle_exception(NFS_SERVER(dir), _nfs4_proc_mkdir(dir, dentry, sattr), @@ -2852,8 +2885,10 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); res.pgbase = args.pgbase; status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); - if (status == 0) + if (status >= 0) { memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); + status += args.pgbase; + } nfs_invalidate_atime(dir); @@ -2914,6 +2949,8 @@ static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, { struct nfs4_exception exception = { }; int err; + + sattr->ia_mode &= ~current_umask(); do { err = nfs4_handle_exception(NFS_SERVER(dir), _nfs4_proc_mknod(dir, dentry, sattr, rdev), @@ -3359,6 +3396,8 @@ static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) ret = nfs_revalidate_inode(server, inode); if (ret < 0) return ret; + if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) + nfs_zap_acl_cache(inode); ret = nfs4_read_cached_acl(inode, buf, buflen); if (ret != -ENOENT) return ret; @@ -3387,6 +3426,13 @@ static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t bufl nfs_inode_return_delegation(inode); buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); ret = nfs4_call_sync(server, &msg, &arg, &res, 1); + /* + * Acl update can result in inode attribute update. + * so mark the attribute cache invalid. + */ + spin_lock(&inode->i_lock); + NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; + spin_unlock(&inode->i_lock); nfs_access_zap_cache(inode); nfs_zap_acl_cache(inode); return ret; @@ -3467,6 +3513,7 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, struct nfs4_setclientid setclientid = { .sc_verifier = &sc_verifier, .sc_prog = program, + .sc_cb_ident = clp->cl_cb_ident, }; struct rpc_message msg = { .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], @@ -3506,7 +3553,7 @@ int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, if (signalled()) break; if (loop++ & 1) - ssleep(clp->cl_lease_time + 1); + ssleep(clp->cl_lease_time / HZ + 1); else if (++clp->cl_id_uniquifier == 0) break; @@ -3652,8 +3699,8 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co data->rpc_status = 0; task_setup_data.callback_data = data; - msg.rpc_argp = &data->args, - msg.rpc_resp = &data->res, + msg.rpc_argp = &data->args; + msg.rpc_resp = &data->res; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); @@ -3732,6 +3779,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock goto out; lsp = request->fl_u.nfs4_fl.owner; arg.lock_owner.id = lsp->ls_id.id; + arg.lock_owner.s_dev = server->s_dev; status = nfs4_call_sync(server, &msg, &arg, &res, 1); switch (status) { case 0: @@ -3897,8 +3945,8 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, return ERR_PTR(-ENOMEM); } - msg.rpc_argp = &data->arg, - msg.rpc_resp = &data->res, + msg.rpc_argp = &data->arg; + msg.rpc_resp = &data->res; task_setup_data.callback_data = data; return rpc_run_task(&task_setup_data); } @@ -3977,6 +4025,7 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, p->arg.lock_stateid = &lsp->ls_stateid; p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; p->arg.lock_owner.id = lsp->ls_id.id; + p->arg.lock_owner.s_dev = server->s_dev; p->res.lock_seqid = p->arg.lock_seqid; p->lsp = lsp; p->server = server; @@ -4134,8 +4183,8 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f data->arg.reclaim = NFS_LOCK_RECLAIM; task_setup_data.callback_ops = &nfs4_recover_lock_ops; } - msg.rpc_argp = &data->arg, - msg.rpc_resp = &data->res, + msg.rpc_argp = &data->arg; + msg.rpc_resp = &data->res; task_setup_data.callback_data = data; task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) @@ -4381,48 +4430,43 @@ void nfs4_release_lockowner(const struct nfs4_lock_state *lsp) return; args->lock_owner.clientid = server->nfs_client->cl_clientid; args->lock_owner.id = lsp->ls_id.id; + args->lock_owner.s_dev = server->s_dev; msg.rpc_argp = args; rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args); } #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" -int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, - size_t buflen, int flags) +static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, + const void *buf, size_t buflen, + int flags, int type) { - struct inode *inode = dentry->d_inode; - - if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) - return -EOPNOTSUPP; + if (strcmp(key, "") != 0) + return -EINVAL; - return nfs4_proc_set_acl(inode, buf, buflen); + return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); } -/* The getxattr man page suggests returning -ENODATA for unknown attributes, - * and that's what we'll do for e.g. user attributes that haven't been set. - * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported - * attributes in kernel-managed attribute namespaces. */ -ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, - size_t buflen) +static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, + void *buf, size_t buflen, int type) { - struct inode *inode = dentry->d_inode; - - if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) - return -EOPNOTSUPP; + if (strcmp(key, "") != 0) + return -EINVAL; - return nfs4_proc_get_acl(inode, buf, buflen); + return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); } -ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) +static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, + size_t list_len, const char *name, + size_t name_len, int type) { - size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; + size_t len = sizeof(XATTR_NAME_NFSV4_ACL); if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) return 0; - if (buf && buflen < len) - return -ERANGE; - if (buf) - memcpy(buf, XATTR_NAME_NFSV4_ACL, len); + + if (list && len <= list_len) + memcpy(list, XATTR_NAME_NFSV4_ACL, len); return len; } @@ -4475,6 +4519,25 @@ int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, #ifdef CONFIG_NFS_V4_1 /* + * Check the exchange flags returned by the server for invalid flags, having + * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or + * DS flags set. + */ +static int nfs4_check_cl_exchange_flags(u32 flags) +{ + if (flags & ~EXCHGID4_FLAG_MASK_R) + goto out_inval; + if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && + (flags & EXCHGID4_FLAG_USE_NON_PNFS)) + goto out_inval; + if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) + goto out_inval; + return NFS_OK; +out_inval: + return -NFS4ERR_INVAL; +} + +/* * nfs4_proc_exchange_id() * * Since the clientid has expired, all compounds using sessions @@ -4487,7 +4550,7 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) nfs4_verifier verifier; struct nfs41_exchange_id_args args = { .client = clp, - .flags = clp->cl_exchange_flags, + .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER, }; struct nfs41_exchange_id_res res = { .client = clp, @@ -4504,9 +4567,6 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) dprintk("--> %s\n", __func__); BUG_ON(clp == NULL); - /* Remove server-only flags */ - args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; - p = (u32 *)verifier.data; *p++ = htonl((u32)clp->cl_boot_time.tv_sec); *p = htonl((u32)clp->cl_boot_time.tv_nsec); @@ -4532,6 +4592,7 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) break; } + status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags); dprintk("<-- %s status= %d\n", __func__, status); return status; } @@ -4765,17 +4826,17 @@ struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) if (!session) return NULL; - init_completion(&session->complete); - tbl = &session->fc_slot_table; tbl->highest_used_slotid = -1; spin_lock_init(&tbl->slot_tbl_lock); rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); + init_completion(&tbl->complete); tbl = &session->bc_slot_table; tbl->highest_used_slotid = -1; spin_lock_init(&tbl->slot_tbl_lock); rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); + init_completion(&tbl->complete); session->session_state = 1<<NFS4_SESSION_INITING; @@ -5269,13 +5330,23 @@ static void nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) { struct nfs4_layoutget *lgp = calldata; - struct inode *ino = lgp->args.inode; - struct nfs_server *server = NFS_SERVER(ino); + struct nfs_server *server = NFS_SERVER(lgp->args.inode); dprintk("--> %s\n", __func__); + /* Note the is a race here, where a CB_LAYOUTRECALL can come in + * right now covering the LAYOUTGET we are about to send. + * However, that is not so catastrophic, and there seems + * to be no way to prevent it completely. + */ if (nfs4_setup_sequence(server, &lgp->args.seq_args, &lgp->res.seq_res, 0, task)) return; + if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, + NFS_I(lgp->args.inode)->layout, + lgp->args.ctx->state)) { + rpc_exit(task, NFS4_OK); + return; + } rpc_call_start(task); } @@ -5302,7 +5373,6 @@ static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) return; } } - lgp->status = task->tk_status; dprintk("<-- %s\n", __func__); } @@ -5311,7 +5381,6 @@ static void nfs4_layoutget_release(void *calldata) struct nfs4_layoutget *lgp = calldata; dprintk("--> %s\n", __func__); - put_layout_hdr(lgp->args.inode); if (lgp->res.layout.buf != NULL) free_page((unsigned long) lgp->res.layout.buf); put_nfs_open_context(lgp->args.ctx); @@ -5356,13 +5425,10 @@ int nfs4_proc_layoutget(struct nfs4_layoutget *lgp) if (IS_ERR(task)) return PTR_ERR(task); status = nfs4_wait_for_completion_rpc_task(task); - if (status != 0) - goto out; - status = lgp->status; - if (status != 0) - goto out; - status = pnfs_layout_process(lgp); -out: + if (status == 0) + status = task->tk_status; + if (status == 0) + status = pnfs_layout_process(lgp); rpc_put_task(task); dprintk("<-- %s status=%d\n", __func__, status); return status; @@ -5493,9 +5559,10 @@ static const struct inode_operations nfs4_file_inode_operations = { .permission = nfs_permission, .getattr = nfs_getattr, .setattr = nfs_setattr, - .getxattr = nfs4_getxattr, - .setxattr = nfs4_setxattr, - .listxattr = nfs4_listxattr, + .getxattr = generic_getxattr, + .setxattr = generic_setxattr, + .listxattr = generic_listxattr, + .removexattr = generic_removexattr, }; const struct nfs_rpc_ops nfs_v4_clientops = { @@ -5540,6 +5607,18 @@ const struct nfs_rpc_ops nfs_v4_clientops = { .open_context = nfs4_atomic_open, }; +static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { + .prefix = XATTR_NAME_NFSV4_ACL, + .list = nfs4_xattr_list_nfs4_acl, + .get = nfs4_xattr_get_nfs4_acl, + .set = nfs4_xattr_set_nfs4_acl, +}; + +const struct xattr_handler *nfs4_xattr_handlers[] = { + &nfs4_xattr_nfs4_acl_handler, + NULL +}; + /* * Local variables: * c-basic-offset: 8 diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c index 72b6c58..402143d 100644 --- a/fs/nfs/nfs4renewd.c +++ b/fs/nfs/nfs4renewd.c @@ -63,9 +63,14 @@ nfs4_renew_state(struct work_struct *work) ops = clp->cl_mvops->state_renewal_ops; dprintk("%s: start\n", __func__); - /* Are there any active superblocks? */ - if (list_empty(&clp->cl_superblocks)) + + rcu_read_lock(); + if (list_empty(&clp->cl_superblocks)) { + rcu_read_unlock(); goto out; + } + rcu_read_unlock(); + spin_lock(&clp->cl_lock); lease = clp->cl_lease_time; last = clp->cl_last_renewal; @@ -75,7 +80,7 @@ nfs4_renew_state(struct work_struct *work) cred = ops->get_state_renewal_cred_locked(clp); spin_unlock(&clp->cl_lock); if (cred == NULL) { - if (list_empty(&clp->cl_delegations)) { + if (!nfs_delegations_present(clp)) { set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); goto out; } diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index f575a31..2336d53 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -105,14 +105,17 @@ static void nfs4_clear_machine_cred(struct nfs_client *clp) put_rpccred(cred); } -struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) +static struct rpc_cred * +nfs4_get_renew_cred_server_locked(struct nfs_server *server) { + struct rpc_cred *cred = NULL; struct nfs4_state_owner *sp; struct rb_node *pos; - struct rpc_cred *cred = NULL; - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); if (list_empty(&sp->so_states)) continue; cred = get_rpccred(sp->so_cred); @@ -121,6 +124,28 @@ struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) return cred; } +/** + * nfs4_get_renew_cred_locked - Acquire credential for a renew operation + * @clp: client state handle + * + * Returns an rpc_cred with reference count bumped, or NULL. + * Caller must hold clp->cl_lock. + */ +struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) +{ + struct rpc_cred *cred = NULL; + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + cred = nfs4_get_renew_cred_server_locked(server); + if (cred != NULL) + break; + } + rcu_read_unlock(); + return cred; +} + #if defined(CONFIG_NFS_V4_1) static int nfs41_setup_state_renewal(struct nfs_client *clp) @@ -142,6 +167,11 @@ static int nfs41_setup_state_renewal(struct nfs_client *clp) return status; } +/* + * Back channel returns NFS4ERR_DELAY for new requests when + * NFS4_SESSION_DRAINING is set so there is no work to be done when draining + * is ended. + */ static void nfs4_end_drain_session(struct nfs_client *clp) { struct nfs4_session *ses = clp->cl_session; @@ -165,22 +195,32 @@ static void nfs4_end_drain_session(struct nfs_client *clp) } } -static int nfs4_begin_drain_session(struct nfs_client *clp) +static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) { - struct nfs4_session *ses = clp->cl_session; - struct nfs4_slot_table *tbl = &ses->fc_slot_table; - spin_lock(&tbl->slot_tbl_lock); - set_bit(NFS4_SESSION_DRAINING, &ses->session_state); if (tbl->highest_used_slotid != -1) { - INIT_COMPLETION(ses->complete); + INIT_COMPLETION(tbl->complete); spin_unlock(&tbl->slot_tbl_lock); - return wait_for_completion_interruptible(&ses->complete); + return wait_for_completion_interruptible(&tbl->complete); } spin_unlock(&tbl->slot_tbl_lock); return 0; } +static int nfs4_begin_drain_session(struct nfs_client *clp) +{ + struct nfs4_session *ses = clp->cl_session; + int ret = 0; + + set_bit(NFS4_SESSION_DRAINING, &ses->session_state); + /* back channel */ + ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); + if (ret) + return ret; + /* fore channel */ + return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); +} + int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) { int status; @@ -192,6 +232,12 @@ int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) status = nfs4_proc_create_session(clp); if (status != 0) goto out; + status = nfs4_set_callback_sessionid(clp); + if (status != 0) { + printk(KERN_WARNING "Sessionid not set. No callback service\n"); + nfs_callback_down(1); + status = 0; + } nfs41_setup_state_renewal(clp); nfs_mark_client_ready(clp, NFS_CS_READY); out: @@ -210,28 +256,56 @@ struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) #endif /* CONFIG_NFS_V4_1 */ -struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) +static struct rpc_cred * +nfs4_get_setclientid_cred_server(struct nfs_server *server) { + struct nfs_client *clp = server->nfs_client; + struct rpc_cred *cred = NULL; struct nfs4_state_owner *sp; struct rb_node *pos; + + spin_lock(&clp->cl_lock); + pos = rb_first(&server->state_owners); + if (pos != NULL) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); + cred = get_rpccred(sp->so_cred); + } + spin_unlock(&clp->cl_lock); + return cred; +} + +/** + * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation + * @clp: client state handle + * + * Returns an rpc_cred with reference count bumped, or NULL. + */ +struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) +{ + struct nfs_server *server; struct rpc_cred *cred; spin_lock(&clp->cl_lock); cred = nfs4_get_machine_cred_locked(clp); + spin_unlock(&clp->cl_lock); if (cred != NULL) goto out; - pos = rb_first(&clp->cl_state_owners); - if (pos != NULL) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); - cred = get_rpccred(sp->so_cred); + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + cred = nfs4_get_setclientid_cred_server(server); + if (cred != NULL) + break; } + rcu_read_unlock(); + out: - spin_unlock(&clp->cl_lock); return cred; } -static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, - __u64 minval, int maxbits) +static void nfs_alloc_unique_id_locked(struct rb_root *root, + struct nfs_unique_id *new, + __u64 minval, int maxbits) { struct rb_node **p, *parent; struct nfs_unique_id *pos; @@ -286,16 +360,15 @@ static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) } static struct nfs4_state_owner * -nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) +nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) { - struct nfs_client *clp = server->nfs_client; - struct rb_node **p = &clp->cl_state_owners.rb_node, + struct rb_node **p = &server->state_owners.rb_node, *parent = NULL; struct nfs4_state_owner *sp, *res = NULL; while (*p != NULL) { parent = *p; - sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); + sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); if (server < sp->so_server) { p = &parent->rb_left; @@ -319,24 +392,17 @@ nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) } static struct nfs4_state_owner * -nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) +nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) { - struct rb_node **p = &clp->cl_state_owners.rb_node, + struct nfs_server *server = new->so_server; + struct rb_node **p = &server->state_owners.rb_node, *parent = NULL; struct nfs4_state_owner *sp; while (*p != NULL) { parent = *p; - sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); + sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); - if (new->so_server < sp->so_server) { - p = &parent->rb_left; - continue; - } - if (new->so_server > sp->so_server) { - p = &parent->rb_right; - continue; - } if (new->so_cred < sp->so_cred) p = &parent->rb_left; else if (new->so_cred > sp->so_cred) @@ -346,18 +412,21 @@ nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) return sp; } } - nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); - rb_link_node(&new->so_client_node, parent, p); - rb_insert_color(&new->so_client_node, &clp->cl_state_owners); + nfs_alloc_unique_id_locked(&server->openowner_id, + &new->so_owner_id, 1, 64); + rb_link_node(&new->so_server_node, parent, p); + rb_insert_color(&new->so_server_node, &server->state_owners); return new; } static void -nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) +nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) { - if (!RB_EMPTY_NODE(&sp->so_client_node)) - rb_erase(&sp->so_client_node, &clp->cl_state_owners); - nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); + struct nfs_server *server = sp->so_server; + + if (!RB_EMPTY_NODE(&sp->so_server_node)) + rb_erase(&sp->so_server_node, &server->state_owners); + nfs_free_unique_id(&server->openowner_id, &sp->so_owner_id); } /* @@ -386,23 +455,32 @@ nfs4_alloc_state_owner(void) static void nfs4_drop_state_owner(struct nfs4_state_owner *sp) { - if (!RB_EMPTY_NODE(&sp->so_client_node)) { - struct nfs_client *clp = sp->so_server->nfs_client; + if (!RB_EMPTY_NODE(&sp->so_server_node)) { + struct nfs_server *server = sp->so_server; + struct nfs_client *clp = server->nfs_client; spin_lock(&clp->cl_lock); - rb_erase(&sp->so_client_node, &clp->cl_state_owners); - RB_CLEAR_NODE(&sp->so_client_node); + rb_erase(&sp->so_server_node, &server->state_owners); + RB_CLEAR_NODE(&sp->so_server_node); spin_unlock(&clp->cl_lock); } } -struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) +/** + * nfs4_get_state_owner - Look up a state owner given a credential + * @server: nfs_server to search + * @cred: RPC credential to match + * + * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. + */ +struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, + struct rpc_cred *cred) { struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp, *new; spin_lock(&clp->cl_lock); - sp = nfs4_find_state_owner(server, cred); + sp = nfs4_find_state_owner_locked(server, cred); spin_unlock(&clp->cl_lock); if (sp != NULL) return sp; @@ -412,7 +490,7 @@ struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct new->so_server = server; new->so_cred = cred; spin_lock(&clp->cl_lock); - sp = nfs4_insert_state_owner(clp, new); + sp = nfs4_insert_state_owner_locked(new); spin_unlock(&clp->cl_lock); if (sp == new) get_rpccred(cred); @@ -423,6 +501,11 @@ struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct return sp; } +/** + * nfs4_put_state_owner - Release a nfs4_state_owner + * @sp: state owner data to release + * + */ void nfs4_put_state_owner(struct nfs4_state_owner *sp) { struct nfs_client *clp = sp->so_server->nfs_client; @@ -430,7 +513,7 @@ void nfs4_put_state_owner(struct nfs4_state_owner *sp) if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) return; - nfs4_remove_state_owner(clp, sp); + nfs4_remove_state_owner_locked(sp); spin_unlock(&clp->cl_lock); rpc_destroy_wait_queue(&sp->so_sequence.wait); put_rpccred(cred); @@ -585,8 +668,11 @@ static void __nfs4_close(struct path *path, struct nfs4_state *state, if (!call_close) { nfs4_put_open_state(state); nfs4_put_state_owner(owner); - } else - nfs4_do_close(path, state, gfp_mask, wait); + } else { + bool roc = pnfs_roc(state->inode); + + nfs4_do_close(path, state, gfp_mask, wait, roc); + } } void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) @@ -633,7 +719,8 @@ __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_p static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) { struct nfs4_lock_state *lsp; - struct nfs_client *clp = state->owner->so_server->nfs_client; + struct nfs_server *server = state->owner->so_server; + struct nfs_client *clp = server->nfs_client; lsp = kzalloc(sizeof(*lsp), GFP_NOFS); if (lsp == NULL) @@ -657,7 +744,7 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f return NULL; } spin_lock(&clp->cl_lock); - nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); + nfs_alloc_unique_id_locked(&server->lockowner_id, &lsp->ls_id, 1, 64); spin_unlock(&clp->cl_lock); INIT_LIST_HEAD(&lsp->ls_locks); return lsp; @@ -665,10 +752,11 @@ static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, f static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) { - struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; + struct nfs_server *server = lsp->ls_state->owner->so_server; + struct nfs_client *clp = server->nfs_client; spin_lock(&clp->cl_lock); - nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); + nfs_free_unique_id(&server->lockowner_id, &lsp->ls_id); spin_unlock(&clp->cl_lock); rpc_destroy_wait_queue(&lsp->ls_sequence.wait); kfree(lsp); @@ -1114,15 +1202,19 @@ static void nfs4_clear_open_state(struct nfs4_state *state) } } -static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) +static void nfs4_reset_seqids(struct nfs_server *server, + int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) { + struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp; struct rb_node *pos; struct nfs4_state *state; - /* Reset all sequence ids to zero */ - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); + spin_lock(&clp->cl_lock); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); sp->so_seqid.flags = 0; spin_lock(&sp->so_lock); list_for_each_entry(state, &sp->so_states, open_states) { @@ -1131,6 +1223,18 @@ static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_re } spin_unlock(&sp->so_lock); } + spin_unlock(&clp->cl_lock); +} + +static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, + int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) +{ + struct nfs_server *server; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs4_reset_seqids(server, mark_reclaim); + rcu_read_unlock(); } static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) @@ -1148,25 +1252,41 @@ static void nfs4_reclaim_complete(struct nfs_client *clp, (void)ops->reclaim_complete(clp); } -static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) +static void nfs4_clear_reclaim_server(struct nfs_server *server) { + struct nfs_client *clp = server->nfs_client; struct nfs4_state_owner *sp; struct rb_node *pos; struct nfs4_state *state; - if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) - return 0; - - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); + spin_lock(&clp->cl_lock); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); spin_lock(&sp->so_lock); list_for_each_entry(state, &sp->so_states, open_states) { - if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) + if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, + &state->flags)) continue; nfs4_state_mark_reclaim_nograce(clp, state); } spin_unlock(&sp->so_lock); } + spin_unlock(&clp->cl_lock); +} + +static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) +{ + struct nfs_server *server; + + if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) + return 0; + + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) + nfs4_clear_reclaim_server(server); + rcu_read_unlock(); nfs_delegation_reap_unclaimed(clp); return 1; @@ -1238,27 +1358,40 @@ static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) { + struct nfs4_state_owner *sp; + struct nfs_server *server; struct rb_node *pos; int status = 0; restart: - spin_lock(&clp->cl_lock); - for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { - struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); - if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) - continue; - atomic_inc(&sp->so_count); - spin_unlock(&clp->cl_lock); - status = nfs4_reclaim_open_state(sp, ops); - if (status < 0) { - set_bit(ops->owner_flag_bit, &sp->so_flags); + rcu_read_lock(); + list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { + spin_lock(&clp->cl_lock); + for (pos = rb_first(&server->state_owners); + pos != NULL; + pos = rb_next(pos)) { + sp = rb_entry(pos, + struct nfs4_state_owner, so_server_node); + if (!test_and_clear_bit(ops->owner_flag_bit, + &sp->so_flags)) + continue; + atomic_inc(&sp->so_count); + spin_unlock(&clp->cl_lock); + rcu_read_unlock(); + + status = nfs4_reclaim_open_state(sp, ops); + if (status < 0) { + set_bit(ops->owner_flag_bit, &sp->so_flags); + nfs4_put_state_owner(sp); + return nfs4_recovery_handle_error(clp, status); + } + nfs4_put_state_owner(sp); - return nfs4_recovery_handle_error(clp, status); + goto restart; } - nfs4_put_state_owner(sp); - goto restart; + spin_unlock(&clp->cl_lock); } - spin_unlock(&clp->cl_lock); + rcu_read_unlock(); return status; } diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index f313c4c..2ab8e5c 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -71,8 +71,8 @@ static int nfs4_stat_to_errno(int); /* lock,open owner id: * we currently use size 2 (u64) out of (NFS4_OPAQUE_LIMIT >> 2) */ -#define open_owner_id_maxsz (1 + 4) -#define lock_owner_id_maxsz (1 + 4) +#define open_owner_id_maxsz (1 + 1 + 4) +#define lock_owner_id_maxsz (1 + 1 + 4) #define decode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define compound_encode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) #define compound_decode_hdr_maxsz (3 + (NFS4_MAXTAGLEN >> 2)) @@ -1088,10 +1088,11 @@ static void encode_lockowner(struct xdr_stream *xdr, const struct nfs_lowner *lo { __be32 *p; - p = reserve_space(xdr, 28); + p = reserve_space(xdr, 32); p = xdr_encode_hyper(p, lowner->clientid); - *p++ = cpu_to_be32(16); + *p++ = cpu_to_be32(20); p = xdr_encode_opaque_fixed(p, "lock id:", 8); + *p++ = cpu_to_be32(lowner->s_dev); xdr_encode_hyper(p, lowner->id); } @@ -1210,10 +1211,11 @@ static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_opena *p++ = cpu_to_be32(OP_OPEN); *p = cpu_to_be32(arg->seqid->sequence->counter); encode_share_access(xdr, arg->fmode); - p = reserve_space(xdr, 28); + p = reserve_space(xdr, 32); p = xdr_encode_hyper(p, arg->clientid); - *p++ = cpu_to_be32(16); + *p++ = cpu_to_be32(20); p = xdr_encode_opaque_fixed(p, "open id:", 8); + *p++ = cpu_to_be32(arg->server->s_dev); xdr_encode_hyper(p, arg->id); } @@ -1510,7 +1512,7 @@ encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr) hdr->replen += decode_restorefh_maxsz; } -static int +static void encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr) { __be32 *p; @@ -1521,14 +1523,12 @@ encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compoun p = reserve_space(xdr, 2*4); *p++ = cpu_to_be32(1); *p = cpu_to_be32(FATTR4_WORD0_ACL); - if (arg->acl_len % 4) - return -EINVAL; + BUG_ON(arg->acl_len % 4); p = reserve_space(xdr, 4); *p = cpu_to_be32(arg->acl_len); xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len); hdr->nops++; hdr->replen += decode_setacl_maxsz; - return 0; } static void @@ -1789,7 +1789,6 @@ encode_layoutget(struct xdr_stream *xdr, const struct nfs4_layoutget_args *args, struct compound_hdr *hdr) { - nfs4_stateid stateid; __be32 *p; p = reserve_space(xdr, 44 + NFS4_STATEID_SIZE); @@ -1800,9 +1799,7 @@ encode_layoutget(struct xdr_stream *xdr, p = xdr_encode_hyper(p, args->range.offset); p = xdr_encode_hyper(p, args->range.length); p = xdr_encode_hyper(p, args->minlength); - pnfs_get_layout_stateid(&stateid, NFS_I(args->inode)->layout, - args->ctx->state); - p = xdr_encode_opaque_fixed(p, &stateid.data, NFS4_STATEID_SIZE); + p = xdr_encode_opaque_fixed(p, &args->stateid.data, NFS4_STATEID_SIZE); *p = cpu_to_be32(args->maxcount); dprintk("%s: 1st type:0x%x iomode:%d off:%lu len:%lu mc:%d\n", @@ -1833,393 +1830,362 @@ static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args) /* * Encode an ACCESS request */ -static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args) +static void nfs4_xdr_enc_access(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_accessargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_access(&xdr, args->access, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_access(xdr, args->access, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode LOOKUP request */ -static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args) +static void nfs4_xdr_enc_lookup(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_lookup_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_lookup(&xdr, args->name, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_lookup(xdr, args->name, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode LOOKUP_ROOT request */ -static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args) +static void nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs4_lookup_root_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putrootfh(&xdr, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putrootfh(xdr, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode REMOVE request */ -static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) +static void nfs4_xdr_enc_remove(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs_removeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_remove(&xdr, &args->name, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_remove(xdr, &args->name, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode RENAME request */ -static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs_renameargs *args) +static void nfs4_xdr_enc_rename(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs_renameargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->old_dir, &hdr); - encode_savefh(&xdr, &hdr); - encode_putfh(&xdr, args->new_dir, &hdr); - encode_rename(&xdr, args->old_name, args->new_name, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->old_dir, &hdr); + encode_savefh(xdr, &hdr); + encode_putfh(xdr, args->new_dir, &hdr); + encode_rename(xdr, args->old_name, args->new_name, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_restorefh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode LINK request */ -static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args) +static void nfs4_xdr_enc_link(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_link_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_savefh(&xdr, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_link(&xdr, args->name, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_savefh(xdr, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_link(xdr, args->name, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_restorefh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode CREATE request */ -static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) +static void nfs4_xdr_enc_create(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_create_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_savefh(&xdr, &hdr); - encode_create(&xdr, args, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_savefh(xdr, &hdr); + encode_create(xdr, args, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_restorefh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode SYMLINK request */ -static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args) +static void nfs4_xdr_enc_symlink(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_create_arg *args) { - return nfs4_xdr_enc_create(req, p, args); + nfs4_xdr_enc_create(req, xdr, args); } /* * Encode GETATTR request */ -static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args) +static void nfs4_xdr_enc_getattr(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_getattr_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a CLOSE request */ -static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) +static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_closeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_close(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_close(xdr, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN request */ -static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) +static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_openargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_savefh(&xdr, &hdr); - encode_open(&xdr, args, &hdr); - encode_getfh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); - encode_restorefh(&xdr, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_savefh(xdr, &hdr); + encode_open(xdr, args, &hdr); + encode_getfh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); + encode_restorefh(xdr, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN_CONFIRM request */ -static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args) +static void nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_open_confirmargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_open_confirm(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open_confirm(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN request with no attributes. */ -static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args) +static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_openargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_open(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open(xdr, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode an OPEN_DOWNGRADE request */ -static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args) +static void nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_closeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_open_downgrade(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_open_downgrade(xdr, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a LOCK request */ -static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args) +static void nfs4_xdr_enc_lock(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_lock_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_lock(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_lock(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a LOCKT request */ -static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args) +static void nfs4_xdr_enc_lockt(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_lockt_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_lockt(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_lockt(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a LOCKU request */ -static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args) +static void nfs4_xdr_enc_locku(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_locku_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_locku(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_locku(xdr, args, &hdr); encode_nops(&hdr); - return 0; } -static int nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, __be32 *p, struct nfs_release_lockowner_args *args) +static void nfs4_xdr_enc_release_lockowner(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_release_lockowner_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_release_lockowner(&xdr, &args->lock_owner, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_release_lockowner(xdr, &args->lock_owner, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a READLINK request */ -static int nfs4_xdr_enc_readlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_readlink *args) +static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_readlink *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_readlink(&xdr, args, req, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_readlink(xdr, args, req, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->pglen); encode_nops(&hdr); - return 0; } /* * Encode a READDIR request */ -static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nfs4_readdir_arg *args) +static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_readdir_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_readdir(&xdr, args, req, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_readdir(xdr, args, req, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->count); @@ -2227,428 +2193,387 @@ static int nfs4_xdr_enc_readdir(struct rpc_rqst *req, __be32 *p, const struct nf __func__, hdr.replen << 2, args->pages, args->pgbase, args->count); encode_nops(&hdr); - return 0; } /* * Encode a READ request */ -static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) +static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_readargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_read(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_read(xdr, args, &hdr); xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages, args->pgbase, args->count); req->rq_rcv_buf.flags |= XDRBUF_READ; encode_nops(&hdr); - return 0; } /* * Encode an SETATTR request */ -static int nfs4_xdr_enc_setattr(struct rpc_rqst *req, __be32 *p, struct nfs_setattrargs *args) +static void nfs4_xdr_enc_setattr(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_setattrargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_setattr(&xdr, args, args->server, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_setattr(xdr, args, args->server, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode a GETACL request */ -static int -nfs4_xdr_enc_getacl(struct rpc_rqst *req, __be32 *p, - struct nfs_getaclargs *args) +static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_getaclargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; uint32_t replen; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); replen = hdr.replen + op_decode_hdr_maxsz + nfs4_fattr_bitmap_maxsz + 1; - encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr); + encode_getattr_two(xdr, FATTR4_WORD0_ACL, 0, &hdr); xdr_inline_pages(&req->rq_rcv_buf, replen << 2, args->acl_pages, args->acl_pgbase, args->acl_len); encode_nops(&hdr); - return 0; } /* * Encode a WRITE request */ -static int nfs4_xdr_enc_write(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void nfs4_xdr_enc_write(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_writeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_write(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_write(xdr, args, &hdr); req->rq_snd_buf.flags |= XDRBUF_WRITE; - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * a COMMIT request */ -static int nfs4_xdr_enc_commit(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) +static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_writeargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_commit(&xdr, args, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_commit(xdr, args, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * FSINFO request */ -static int nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, __be32 *p, struct nfs4_fsinfo_arg *args) +static void nfs4_xdr_enc_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs4_fsinfo_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_fsinfo(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_fsinfo(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * a PATHCONF request */ -static int nfs4_xdr_enc_pathconf(struct rpc_rqst *req, __be32 *p, const struct nfs4_pathconf_arg *args) +static void nfs4_xdr_enc_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_pathconf_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_getattr_one(&xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0], + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getattr_one(xdr, args->bitmask[0] & nfs4_pathconf_bitmap[0], &hdr); encode_nops(&hdr); - return 0; } /* * a STATFS request */ -static int nfs4_xdr_enc_statfs(struct rpc_rqst *req, __be32 *p, const struct nfs4_statfs_arg *args) +static void nfs4_xdr_enc_statfs(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfs4_statfs_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - encode_getattr_two(&xdr, args->bitmask[0] & nfs4_statfs_bitmap[0], + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_getattr_two(xdr, args->bitmask[0] & nfs4_statfs_bitmap[0], args->bitmask[1] & nfs4_statfs_bitmap[1], &hdr); encode_nops(&hdr); - return 0; } /* * GETATTR_BITMAP request */ -static int nfs4_xdr_enc_server_caps(struct rpc_rqst *req, __be32 *p, - struct nfs4_server_caps_arg *args) +static void nfs4_xdr_enc_server_caps(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_server_caps_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fhandle, &hdr); - encode_getattr_one(&xdr, FATTR4_WORD0_SUPPORTED_ATTRS| + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fhandle, &hdr); + encode_getattr_one(xdr, FATTR4_WORD0_SUPPORTED_ATTRS| FATTR4_WORD0_LINK_SUPPORT| FATTR4_WORD0_SYMLINK_SUPPORT| FATTR4_WORD0_ACLSUPPORT, &hdr); encode_nops(&hdr); - return 0; } /* * a RENEW request */ -static int nfs4_xdr_enc_renew(struct rpc_rqst *req, __be32 *p, struct nfs_client *clp) +static void nfs4_xdr_enc_renew(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_client *clp) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_renew(&xdr, clp, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_renew(xdr, clp, &hdr); encode_nops(&hdr); - return 0; } /* * a SETCLIENTID request */ -static int nfs4_xdr_enc_setclientid(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid *sc) +static void nfs4_xdr_enc_setclientid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_setclientid *sc) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_setclientid(&xdr, sc, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_setclientid(xdr, sc, &hdr); encode_nops(&hdr); - return 0; } /* * a SETCLIENTID_CONFIRM request */ -static int nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs4_setclientid_res *arg) +static void nfs4_xdr_enc_setclientid_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_setclientid_res *arg) { - struct xdr_stream xdr; struct compound_hdr hdr = { .nops = 0, }; const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_setclientid_confirm(&xdr, arg, &hdr); - encode_putrootfh(&xdr, &hdr); - encode_fsinfo(&xdr, lease_bitmap, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_setclientid_confirm(xdr, arg, &hdr); + encode_putrootfh(xdr, &hdr); + encode_fsinfo(xdr, lease_bitmap, &hdr); encode_nops(&hdr); - return 0; } /* * DELEGRETURN request */ -static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, __be32 *p, const struct nfs4_delegreturnargs *args) +static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, + struct xdr_stream *xdr, + const struct nfs4_delegreturnargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fhandle, &hdr); - encode_delegreturn(&xdr, args->stateid, &hdr); - encode_getfattr(&xdr, args->bitmask, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fhandle, &hdr); + encode_delegreturn(xdr, args->stateid, &hdr); + encode_getfattr(xdr, args->bitmask, &hdr); encode_nops(&hdr); - return 0; } /* * Encode FS_LOCATIONS request */ -static int nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, __be32 *p, struct nfs4_fs_locations_arg *args) +static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_fs_locations_arg *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; uint32_t replen; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->dir_fh, &hdr); - encode_lookup(&xdr, args->name, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->dir_fh, &hdr); + encode_lookup(xdr, args->name, &hdr); replen = hdr.replen; /* get the attribute into args->page */ - encode_fs_locations(&xdr, args->bitmask, &hdr); + encode_fs_locations(xdr, args->bitmask, &hdr); xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page, 0, PAGE_SIZE); encode_nops(&hdr); - return 0; } #if defined(CONFIG_NFS_V4_1) /* * EXCHANGE_ID request */ -static int nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, uint32_t *p, - struct nfs41_exchange_id_args *args) +static void nfs4_xdr_enc_exchange_id(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_exchange_id_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = args->client->cl_mvops->minor_version, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_exchange_id(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_exchange_id(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * a CREATE_SESSION request */ -static int nfs4_xdr_enc_create_session(struct rpc_rqst *req, uint32_t *p, - struct nfs41_create_session_args *args) +static void nfs4_xdr_enc_create_session(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_create_session_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = args->client->cl_mvops->minor_version, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_create_session(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_create_session(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * a DESTROY_SESSION request */ -static int nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, uint32_t *p, - struct nfs4_session *session) +static void nfs4_xdr_enc_destroy_session(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_session *session) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = session->clp->cl_mvops->minor_version, }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_destroy_session(&xdr, session, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_destroy_session(xdr, session, &hdr); encode_nops(&hdr); - return 0; } /* * a SEQUENCE request */ -static int nfs4_xdr_enc_sequence(struct rpc_rqst *req, uint32_t *p, - struct nfs4_sequence_args *args) +static void nfs4_xdr_enc_sequence(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs4_sequence_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * a GET_LEASE_TIME request */ -static int nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, uint32_t *p, - struct nfs4_get_lease_time_args *args) +static void nfs4_xdr_enc_get_lease_time(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_get_lease_time_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->la_seq_args), }; const u32 lease_bitmap[2] = { FATTR4_WORD0_LEASE_TIME, 0 }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->la_seq_args, &hdr); - encode_putrootfh(&xdr, &hdr); - encode_fsinfo(&xdr, lease_bitmap, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->la_seq_args, &hdr); + encode_putrootfh(xdr, &hdr); + encode_fsinfo(xdr, lease_bitmap, &hdr); encode_nops(&hdr); - return 0; } /* * a RECLAIM_COMPLETE request */ -static int nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, uint32_t *p, - struct nfs41_reclaim_complete_args *args) +static void nfs4_xdr_enc_reclaim_complete(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_reclaim_complete_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args) }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_reclaim_complete(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_reclaim_complete(xdr, args, &hdr); encode_nops(&hdr); - return 0; } /* * Encode GETDEVICEINFO request */ -static int nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, uint32_t *p, - struct nfs4_getdeviceinfo_args *args) +static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_getdeviceinfo_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_getdeviceinfo(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_getdeviceinfo(xdr, args, &hdr); /* set up reply kvec. Subtract notification bitmap max size (2) * so that notification bitmap is put in xdr_buf tail */ @@ -2657,27 +2582,24 @@ static int nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req, uint32_t *p, args->pdev->pglen); encode_nops(&hdr); - return 0; } /* * Encode LAYOUTGET request */ -static int nfs4_xdr_enc_layoutget(struct rpc_rqst *req, uint32_t *p, - struct nfs4_layoutget_args *args) +static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_layoutget_args *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, NFS_FH(args->inode), &hdr); - encode_layoutget(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, NFS_FH(args->inode), &hdr); + encode_layoutget(xdr, args, &hdr); encode_nops(&hdr); - return 0; } #endif /* CONFIG_NFS_V4_1 */ @@ -4475,7 +4397,7 @@ static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs_ goto out_overflow; eof = be32_to_cpup(p++); count = be32_to_cpup(p); - hdrlen = (u8 *) p - (u8 *) iov->iov_base; + hdrlen = (u8 *) xdr->p - (u8 *) iov->iov_base; recvd = req->rq_rcv_buf.len - hdrlen; if (count > recvd) { dprintk("NFS: server cheating in read reply: " @@ -4518,7 +4440,7 @@ static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct n xdr_read_pages(xdr, pglen); - return 0; + return pglen; } static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req) @@ -5000,7 +4922,7 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr, goto out_overflow; len = be32_to_cpup(p); if (len) { - int i; + uint32_t i; p = xdr_inline_decode(xdr, 4 * len); if (unlikely(!p)) @@ -5090,26 +5012,26 @@ out_overflow: /* * Decode OPEN_DOWNGRADE response */ -static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) +static int nfs4_xdr_dec_open_downgrade(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_closeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_open_downgrade(&xdr, res); + status = decode_open_downgrade(xdr, res); if (status != 0) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5118,26 +5040,25 @@ out: /* * Decode ACCESS response */ -static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_accessres *res) +static int nfs4_xdr_dec_access(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_accessres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status != 0) goto out; - status = decode_access(&xdr, res); + status = decode_access(xdr, res); if (status != 0) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5146,26 +5067,28 @@ out: /* * Decode LOOKUP response */ -static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) +static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_lookup_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_lookup(&xdr)) != 0) + status = decode_lookup(xdr); + if (status) goto out; - if ((status = decode_getfh(&xdr, res->fh)) != 0) + status = decode_getfh(xdr, res->fh); + if (status) goto out; - status = decode_getfattr(&xdr, res->fattr, res->server + status = decode_getfattr(xdr, res->fattr, res->server ,!RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5174,23 +5097,25 @@ out: /* * Decode LOOKUP_ROOT response */ -static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_lookup_res *res) +static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_lookup_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putrootfh(&xdr)) != 0) + status = decode_putrootfh(xdr); + if (status) goto out; - if ((status = decode_getfh(&xdr, res->fh)) == 0) - status = decode_getfattr(&xdr, res->fattr, res->server, + status = decode_getfh(xdr, res->fh); + if (status == 0) + status = decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5199,24 +5124,25 @@ out: /* * Decode REMOVE response */ -static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, __be32 *p, struct nfs_removeres *res) +static int nfs4_xdr_dec_remove(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_removeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_remove(&xdr, &res->cinfo)) != 0) + status = decode_remove(xdr, &res->cinfo); + if (status) goto out; - decode_getfattr(&xdr, res->dir_attr, res->server, + decode_getfattr(xdr, res->dir_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5225,34 +5151,38 @@ out: /* * Decode RENAME response */ -static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, __be32 *p, struct nfs_renameres *res) +static int nfs4_xdr_dec_rename(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_renameres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_savefh(&xdr)) != 0) + status = decode_savefh(xdr); + if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_rename(&xdr, &res->old_cinfo, &res->new_cinfo)) != 0) + status = decode_rename(xdr, &res->old_cinfo, &res->new_cinfo); + if (status) goto out; /* Current FH is target directory */ - if (decode_getfattr(&xdr, res->new_fattr, res->server, + if (decode_getfattr(xdr, res->new_fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; - if ((status = decode_restorefh(&xdr)) != 0) + status = decode_restorefh(xdr); + if (status) goto out; - decode_getfattr(&xdr, res->old_fattr, res->server, + decode_getfattr(xdr, res->old_fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5261,37 +5191,41 @@ out: /* * Decode LINK response */ -static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_link_res *res) +static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_link_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_savefh(&xdr)) != 0) + status = decode_savefh(xdr); + if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_link(&xdr, &res->cinfo)) != 0) + status = decode_link(xdr, &res->cinfo); + if (status) goto out; /* * Note order: OP_LINK leaves the directory as the current * filehandle. */ - if (decode_getfattr(&xdr, res->dir_attr, res->server, + if (decode_getfattr(xdr, res->dir_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; - if ((status = decode_restorefh(&xdr)) != 0) + status = decode_restorefh(xdr); + if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5300,33 +5234,37 @@ out: /* * Decode CREATE response */ -static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) +static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_create_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_savefh(&xdr)) != 0) + status = decode_savefh(xdr); + if (status) goto out; - if ((status = decode_create(&xdr,&res->dir_cinfo)) != 0) + status = decode_create(xdr, &res->dir_cinfo); + if (status) goto out; - if ((status = decode_getfh(&xdr, res->fh)) != 0) + status = decode_getfh(xdr, res->fh); + if (status) goto out; - if (decode_getfattr(&xdr, res->fattr, res->server, + if (decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; - if ((status = decode_restorefh(&xdr)) != 0) + status = decode_restorefh(xdr); + if (status) goto out; - decode_getfattr(&xdr, res->dir_fattr, res->server, + decode_getfattr(xdr, res->dir_fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5335,31 +5273,31 @@ out: /* * Decode SYMLINK response */ -static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_create_res *res) +static int nfs4_xdr_dec_symlink(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_create_res *res) { - return nfs4_xdr_dec_create(rqstp, p, res); + return nfs4_xdr_dec_create(rqstp, xdr, res); } /* * Decode GETATTR response */ -static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_getattr_res *res) +static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_getattr_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_getfattr(&xdr, res->fattr, res->server, + status = decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5368,46 +5306,40 @@ out: /* * Encode an SETACL request */ -static int -nfs4_xdr_enc_setacl(struct rpc_rqst *req, __be32 *p, struct nfs_setaclargs *args) +static void nfs4_xdr_enc_setacl(struct rpc_rqst *req, struct xdr_stream *xdr, + struct nfs_setaclargs *args) { - struct xdr_stream xdr; struct compound_hdr hdr = { .minorversion = nfs4_xdr_minorversion(&args->seq_args), }; - int status; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_compound_hdr(&xdr, req, &hdr); - encode_sequence(&xdr, &args->seq_args, &hdr); - encode_putfh(&xdr, args->fh, &hdr); - status = encode_setacl(&xdr, args, &hdr); + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_putfh(xdr, args->fh, &hdr); + encode_setacl(xdr, args, &hdr); encode_nops(&hdr); - return status; } /* * Decode SETACL response */ static int -nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, __be32 *p, +nfs4_xdr_dec_setacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr, struct nfs_setaclres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_setattr(&xdr); + status = decode_setattr(xdr); out: return status; } @@ -5416,24 +5348,22 @@ out: * Decode GETACL response */ static int -nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, __be32 *p, +nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr, struct nfs_getaclres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_getacl(&xdr, rqstp, &res->acl_len); + status = decode_getacl(xdr, rqstp, &res->acl_len); out: return status; @@ -5442,23 +5372,22 @@ out: /* * Decode CLOSE response */ -static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_closeres *res) +static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_closeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_close(&xdr, res); + status = decode_close(xdr, res); if (status != 0) goto out; /* @@ -5467,7 +5396,7 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, __be32 *p, struct nfs_clos * an ESTALE error. Shouldn't be a problem, * though, since fattr->valid will remain unset. */ - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5476,36 +5405,35 @@ out: /* * Decode OPEN response */ -static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) +static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_openres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_savefh(&xdr); + status = decode_savefh(xdr); if (status) goto out; - status = decode_open(&xdr, res); + status = decode_open(xdr, res); if (status) goto out; - if (decode_getfh(&xdr, &res->fh) != 0) + if (decode_getfh(xdr, &res->fh) != 0) goto out; - if (decode_getfattr(&xdr, res->f_attr, res->server, + if (decode_getfattr(xdr, res->f_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)) != 0) goto out; - if (decode_restorefh(&xdr) != 0) + if (decode_restorefh(xdr) != 0) goto out; - decode_getfattr(&xdr, res->dir_attr, res->server, + decode_getfattr(xdr, res->dir_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5514,20 +5442,20 @@ out: /* * Decode OPEN_CONFIRM response */ -static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, __be32 *p, struct nfs_open_confirmres *res) +static int nfs4_xdr_dec_open_confirm(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_open_confirmres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_open_confirm(&xdr, res); + status = decode_open_confirm(xdr, res); out: return status; } @@ -5535,26 +5463,26 @@ out: /* * Decode OPEN response */ -static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_openres *res) +static int nfs4_xdr_dec_open_noattr(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_openres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_open(&xdr, res); + status = decode_open(xdr, res); if (status) goto out; - decode_getfattr(&xdr, res->f_attr, res->server, + decode_getfattr(xdr, res->f_attr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5563,26 +5491,26 @@ out: /* * Decode SETATTR response */ -static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, __be32 *p, struct nfs_setattrres *res) +static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs_setattrres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_setattr(&xdr); + status = decode_setattr(xdr); if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5591,23 +5519,22 @@ out: /* * Decode LOCK response */ -static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lock_res *res) +static int nfs4_xdr_dec_lock(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_lock_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_lock(&xdr, res); + status = decode_lock(xdr, res); out: return status; } @@ -5615,23 +5542,22 @@ out: /* * Decode LOCKT response */ -static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, __be32 *p, struct nfs_lockt_res *res) +static int nfs4_xdr_dec_lockt(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_lockt_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_lockt(&xdr, res); + status = decode_lockt(xdr, res); out: return status; } @@ -5639,61 +5565,58 @@ out: /* * Decode LOCKU response */ -static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, __be32 *p, struct nfs_locku_res *res) +static int nfs4_xdr_dec_locku(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_locku_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_locku(&xdr, res); + status = decode_locku(xdr, res); out: return status; } -static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, __be32 *p, void *dummy) +static int nfs4_xdr_dec_release_lockowner(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, void *dummy) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_release_lockowner(&xdr); + status = decode_release_lockowner(xdr); return status; } /* * Decode READLINK response */ -static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, __be32 *p, +static int nfs4_xdr_dec_readlink(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_readlink_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_readlink(&xdr, rqstp); + status = decode_readlink(xdr, rqstp); out: return status; } @@ -5701,23 +5624,22 @@ out: /* * Decode READDIR response */ -static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_readdir_res *res) +static int nfs4_xdr_dec_readdir(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs4_readdir_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_readdir(&xdr, rqstp, res); + status = decode_readdir(xdr, rqstp, res); out: return status; } @@ -5725,23 +5647,22 @@ out: /* * Decode Read response */ -static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, __be32 *p, struct nfs_readres *res) +static int nfs4_xdr_dec_read(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_readres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_read(&xdr, rqstp, res); + status = decode_read(xdr, rqstp, res); if (!status) status = res->count; out: @@ -5751,26 +5672,25 @@ out: /* * Decode WRITE response */ -static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) +static int nfs4_xdr_dec_write(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_writeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_write(&xdr, res); + status = decode_write(xdr, res); if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); if (!status) status = res->count; @@ -5781,26 +5701,25 @@ out: /* * Decode COMMIT response */ -static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, __be32 *p, struct nfs_writeres *res) +static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + struct nfs_writeres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_commit(&xdr, res); + status = decode_commit(xdr, res); if (status) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5809,85 +5728,80 @@ out: /* * Decode FSINFO response */ -static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_fsinfo(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs4_fsinfo_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (!status) - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (!status) - status = decode_fsinfo(&xdr, res->fsinfo); + status = decode_fsinfo(xdr, res->fsinfo); return status; } /* * Decode PATHCONF response */ -static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_pathconf(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs4_pathconf_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (!status) - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (!status) - status = decode_pathconf(&xdr, res->pathconf); + status = decode_pathconf(xdr, res->pathconf); return status; } /* * Decode STATFS response */ -static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_statfs(struct rpc_rqst *req, struct xdr_stream *xdr, struct nfs4_statfs_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (!status) - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (!status) - status = decode_statfs(&xdr, res->fsstat); + status = decode_statfs(xdr, res->fsstat); return status; } /* * Decode GETATTR_BITMAP response */ -static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, __be32 *p, struct nfs4_server_caps_res *res) +static int nfs4_xdr_dec_server_caps(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_server_caps_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - status = decode_server_caps(&xdr, res); + status = decode_server_caps(xdr, res); out: return status; } @@ -5895,79 +5809,77 @@ out: /* * Decode RENEW response */ -static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, __be32 *p, void *dummy) +static int nfs4_xdr_dec_renew(struct rpc_rqst *rqstp, struct xdr_stream *xdr, + void *__unused) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_renew(&xdr); + status = decode_renew(xdr); return status; } /* * Decode SETCLIENTID response */ -static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, __be32 *p, - struct nfs4_setclientid_res *res) +static int nfs4_xdr_dec_setclientid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs4_setclientid_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_setclientid(&xdr, res); + status = decode_setclientid(xdr, res); return status; } /* * Decode SETCLIENTID_CONFIRM response */ -static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *fsinfo) +static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs_fsinfo *fsinfo) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_setclientid_confirm(&xdr); + status = decode_setclientid_confirm(xdr); if (!status) - status = decode_putrootfh(&xdr); + status = decode_putrootfh(xdr); if (!status) - status = decode_fsinfo(&xdr, fsinfo); + status = decode_fsinfo(xdr, fsinfo); return status; } /* * Decode DELEGRETURN response */ -static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, __be32 *p, struct nfs4_delegreturnres *res) +static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs4_delegreturnres *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status != 0) goto out; - status = decode_delegreturn(&xdr); + status = decode_delegreturn(xdr); if (status != 0) goto out; - decode_getfattr(&xdr, res->fattr, res->server, + decode_getfattr(xdr, res->fattr, res->server, !RPC_IS_ASYNC(rqstp->rq_task)); out: return status; @@ -5976,26 +5888,27 @@ out: /* * Decode FS_LOCATIONS response */ -static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, __be32 *p, +static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, + struct xdr_stream *xdr, struct nfs4_fs_locations_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &req->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, req); + status = decode_sequence(xdr, &res->seq_res, req); if (status) goto out; - if ((status = decode_putfh(&xdr)) != 0) + status = decode_putfh(xdr); + if (status) goto out; - if ((status = decode_lookup(&xdr)) != 0) + status = decode_lookup(xdr); + if (status) goto out; - xdr_enter_page(&xdr, PAGE_SIZE); - status = decode_getfattr(&xdr, &res->fs_locations->fattr, + xdr_enter_page(xdr, PAGE_SIZE); + status = decode_getfattr(xdr, &res->fs_locations->fattr, res->fs_locations->server, !RPC_IS_ASYNC(req->rq_task)); out: @@ -6006,129 +5919,122 @@ out: /* * Decode EXCHANGE_ID response */ -static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_exchange_id(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, void *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_exchange_id(&xdr, res); + status = decode_exchange_id(xdr, res); return status; } /* * Decode CREATE_SESSION response */ -static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_create_session(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs41_create_session_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_create_session(&xdr, res); + status = decode_create_session(xdr, res); return status; } /* * Decode DESTROY_SESSION response */ -static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, uint32_t *p, - void *dummy) +static int nfs4_xdr_dec_destroy_session(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + void *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_destroy_session(&xdr, dummy); + status = decode_destroy_session(xdr, res); return status; } /* * Decode SEQUENCE response */ -static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_sequence(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_sequence_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, res, rqstp); + status = decode_sequence(xdr, res, rqstp); return status; } /* * Decode GET_LEASE_TIME response */ -static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_get_lease_time(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_get_lease_time_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->lr_seq_res, rqstp); + status = decode_sequence(xdr, &res->lr_seq_res, rqstp); if (!status) - status = decode_putrootfh(&xdr); + status = decode_putrootfh(xdr); if (!status) - status = decode_fsinfo(&xdr, res->lr_fsinfo); + status = decode_fsinfo(xdr, res->lr_fsinfo); return status; } /* * Decode RECLAIM_COMPLETE response */ -static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_reclaim_complete(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs41_reclaim_complete_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (!status) - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (!status) - status = decode_reclaim_complete(&xdr, (void *)NULL); + status = decode_reclaim_complete(xdr, (void *)NULL); return status; } /* * Decode GETDEVINFO response */ -static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_getdeviceinfo(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_getdeviceinfo_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status != 0) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status != 0) goto out; - status = decode_getdeviceinfo(&xdr, res->pdev); + status = decode_getdeviceinfo(xdr, res->pdev); out: return status; } @@ -6136,31 +6042,44 @@ out: /* * Decode LAYOUTGET response */ -static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, uint32_t *p, +static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, struct nfs4_layoutget_res *res) { - struct xdr_stream xdr; struct compound_hdr hdr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_compound_hdr(&xdr, &hdr); + status = decode_compound_hdr(xdr, &hdr); if (status) goto out; - status = decode_sequence(&xdr, &res->seq_res, rqstp); + status = decode_sequence(xdr, &res->seq_res, rqstp); if (status) goto out; - status = decode_putfh(&xdr); + status = decode_putfh(xdr); if (status) goto out; - status = decode_layoutget(&xdr, rqstp, res); + status = decode_layoutget(xdr, rqstp, res); out: return status; } #endif /* CONFIG_NFS_V4_1 */ -__be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, - struct nfs_server *server, int plus) +/** + * nfs4_decode_dirent - Decode a single NFSv4 directory entry stored in + * the local page cache. + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns zero if successful, otherwise a negative errno value is + * returned. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + */ +int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + int plus) { uint32_t bitmap[2] = {0}; uint32_t len; @@ -6172,9 +6091,9 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (unlikely(!p)) goto out_overflow; if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); + return -EAGAIN; entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); + return -EBADCOOKIE; } p = xdr_inline_decode(xdr, 12); @@ -6203,25 +6122,24 @@ __be32 *nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, if (decode_attr_length(xdr, &len, &p) < 0) goto out_overflow; - if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, server, 1) < 0) + if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, + entry->server, 1) < 0) goto out_overflow; if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID) entry->ino = entry->fattr->fileid; + entry->d_type = DT_UNKNOWN; + if (entry->fattr->valid & NFS_ATTR_FATTR_TYPE) + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); + if (verify_attr_len(xdr, p, len) < 0) goto out_overflow; - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; - - return p; + return 0; out_overflow: print_overflow_msg(__func__, xdr); - return ERR_PTR(-EIO); + return -EAGAIN; } /* @@ -6297,8 +6215,8 @@ nfs4_stat_to_errno(int stat) #define PROC(proc, argtype, restype) \ [NFSPROC4_CLNT_##proc] = { \ .p_proc = NFSPROC4_COMPOUND, \ - .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ + .p_encode = (kxdreproc_t)nfs4_xdr_##argtype, \ + .p_decode = (kxdrdproc_t)nfs4_xdr_##restype, \ .p_arglen = NFS4_##argtype##_sz, \ .p_replen = NFS4_##restype##_sz, \ .p_statidx = NFSPROC4_CLNT_##proc, \ @@ -6306,50 +6224,50 @@ nfs4_stat_to_errno(int stat) } struct rpc_procinfo nfs4_procedures[] = { - PROC(READ, enc_read, dec_read), - PROC(WRITE, enc_write, dec_write), - PROC(COMMIT, enc_commit, dec_commit), - PROC(OPEN, enc_open, dec_open), - PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm), - PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr), - PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade), - PROC(CLOSE, enc_close, dec_close), - PROC(SETATTR, enc_setattr, dec_setattr), - PROC(FSINFO, enc_fsinfo, dec_fsinfo), - PROC(RENEW, enc_renew, dec_renew), - PROC(SETCLIENTID, enc_setclientid, dec_setclientid), - PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm), - PROC(LOCK, enc_lock, dec_lock), - PROC(LOCKT, enc_lockt, dec_lockt), - PROC(LOCKU, enc_locku, dec_locku), - PROC(ACCESS, enc_access, dec_access), - PROC(GETATTR, enc_getattr, dec_getattr), - PROC(LOOKUP, enc_lookup, dec_lookup), - PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), - PROC(REMOVE, enc_remove, dec_remove), - PROC(RENAME, enc_rename, dec_rename), - PROC(LINK, enc_link, dec_link), - PROC(SYMLINK, enc_symlink, dec_symlink), - PROC(CREATE, enc_create, dec_create), - PROC(PATHCONF, enc_pathconf, dec_pathconf), - PROC(STATFS, enc_statfs, dec_statfs), - PROC(READLINK, enc_readlink, dec_readlink), - PROC(READDIR, enc_readdir, dec_readdir), - PROC(SERVER_CAPS, enc_server_caps, dec_server_caps), - PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), - PROC(GETACL, enc_getacl, dec_getacl), - PROC(SETACL, enc_setacl, dec_setacl), - PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations), - PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner), + PROC(READ, enc_read, dec_read), + PROC(WRITE, enc_write, dec_write), + PROC(COMMIT, enc_commit, dec_commit), + PROC(OPEN, enc_open, dec_open), + PROC(OPEN_CONFIRM, enc_open_confirm, dec_open_confirm), + PROC(OPEN_NOATTR, enc_open_noattr, dec_open_noattr), + PROC(OPEN_DOWNGRADE, enc_open_downgrade, dec_open_downgrade), + PROC(CLOSE, enc_close, dec_close), + PROC(SETATTR, enc_setattr, dec_setattr), + PROC(FSINFO, enc_fsinfo, dec_fsinfo), + PROC(RENEW, enc_renew, dec_renew), + PROC(SETCLIENTID, enc_setclientid, dec_setclientid), + PROC(SETCLIENTID_CONFIRM, enc_setclientid_confirm, dec_setclientid_confirm), + PROC(LOCK, enc_lock, dec_lock), + PROC(LOCKT, enc_lockt, dec_lockt), + PROC(LOCKU, enc_locku, dec_locku), + PROC(ACCESS, enc_access, dec_access), + PROC(GETATTR, enc_getattr, dec_getattr), + PROC(LOOKUP, enc_lookup, dec_lookup), + PROC(LOOKUP_ROOT, enc_lookup_root, dec_lookup_root), + PROC(REMOVE, enc_remove, dec_remove), + PROC(RENAME, enc_rename, dec_rename), + PROC(LINK, enc_link, dec_link), + PROC(SYMLINK, enc_symlink, dec_symlink), + PROC(CREATE, enc_create, dec_create), + PROC(PATHCONF, enc_pathconf, dec_pathconf), + PROC(STATFS, enc_statfs, dec_statfs), + PROC(READLINK, enc_readlink, dec_readlink), + PROC(READDIR, enc_readdir, dec_readdir), + PROC(SERVER_CAPS, enc_server_caps, dec_server_caps), + PROC(DELEGRETURN, enc_delegreturn, dec_delegreturn), + PROC(GETACL, enc_getacl, dec_getacl), + PROC(SETACL, enc_setacl, dec_setacl), + PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations), + PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner), #if defined(CONFIG_NFS_V4_1) - PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), - PROC(CREATE_SESSION, enc_create_session, dec_create_session), - PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), - PROC(SEQUENCE, enc_sequence, dec_sequence), - PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), - PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete), - PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo), - PROC(LAYOUTGET, enc_layoutget, dec_layoutget), + PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id), + PROC(CREATE_SESSION, enc_create_session, dec_create_session), + PROC(DESTROY_SESSION, enc_destroy_session, dec_destroy_session), + PROC(SEQUENCE, enc_sequence, dec_sequence), + PROC(GET_LEASE_TIME, enc_get_lease_time, dec_get_lease_time), + PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete), + PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo), + PROC(LAYOUTGET, enc_layoutget, dec_layoutget), #endif /* CONFIG_NFS_V4_1 */ }; diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 9194902..e1164e3 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -26,12 +26,9 @@ static struct kmem_cache *nfs_page_cachep; static inline struct nfs_page * nfs_page_alloc(void) { - struct nfs_page *p; - p = kmem_cache_alloc(nfs_page_cachep, GFP_KERNEL); - if (p) { - memset(p, 0, sizeof(*p)); + struct nfs_page *p = kmem_cache_zalloc(nfs_page_cachep, GFP_KERNEL); + if (p) INIT_LIST_HEAD(&p->wb_list); - } return p; } @@ -65,6 +62,13 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode, if (req == NULL) return ERR_PTR(-ENOMEM); + /* get lock context early so we can deal with alloc failures */ + req->wb_lock_context = nfs_get_lock_context(ctx); + if (req->wb_lock_context == NULL) { + nfs_page_free(req); + return ERR_PTR(-ENOMEM); + } + /* Initialize the request struct. Initially, we assume a * long write-back delay. This will be adjusted in * update_nfs_request below if the region is not locked. */ @@ -79,7 +83,6 @@ nfs_create_request(struct nfs_open_context *ctx, struct inode *inode, req->wb_pgbase = offset; req->wb_bytes = count; req->wb_context = get_nfs_open_context(ctx); - req->wb_lock_context = nfs_get_lock_context(ctx); kref_init(&req->wb_kref); return req; } @@ -109,7 +112,7 @@ int nfs_set_page_tag_locked(struct nfs_page *req) { if (!nfs_lock_request_dontget(req)) return 0; - if (req->wb_page != NULL) + if (test_bit(PG_MAPPED, &req->wb_flags)) radix_tree_tag_set(&NFS_I(req->wb_context->path.dentry->d_inode)->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_LOCKED); return 1; } @@ -119,7 +122,7 @@ int nfs_set_page_tag_locked(struct nfs_page *req) */ void nfs_clear_page_tag_locked(struct nfs_page *req) { - if (req->wb_page != NULL) { + if (test_bit(PG_MAPPED, &req->wb_flags)) { struct inode *inode = req->wb_context->path.dentry->d_inode; struct nfs_inode *nfsi = NFS_I(inode); diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index db77342..bc40897 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -177,105 +177,149 @@ EXPORT_SYMBOL_GPL(pnfs_unregister_layoutdriver); * pNFS client layout cache */ +/* Need to hold i_lock if caller does not already hold reference */ +void +get_layout_hdr(struct pnfs_layout_hdr *lo) +{ + atomic_inc(&lo->plh_refcount); +} + static void -get_layout_hdr_locked(struct pnfs_layout_hdr *lo) +destroy_layout_hdr(struct pnfs_layout_hdr *lo) { - assert_spin_locked(&lo->inode->i_lock); - lo->refcount++; + dprintk("%s: freeing layout cache %p\n", __func__, lo); + BUG_ON(!list_empty(&lo->plh_layouts)); + NFS_I(lo->plh_inode)->layout = NULL; + kfree(lo); } static void put_layout_hdr_locked(struct pnfs_layout_hdr *lo) { - assert_spin_locked(&lo->inode->i_lock); - BUG_ON(lo->refcount == 0); - - lo->refcount--; - if (!lo->refcount) { - dprintk("%s: freeing layout cache %p\n", __func__, lo); - BUG_ON(!list_empty(&lo->layouts)); - NFS_I(lo->inode)->layout = NULL; - kfree(lo); - } + if (atomic_dec_and_test(&lo->plh_refcount)) + destroy_layout_hdr(lo); } void -put_layout_hdr(struct inode *inode) +put_layout_hdr(struct pnfs_layout_hdr *lo) { - spin_lock(&inode->i_lock); - put_layout_hdr_locked(NFS_I(inode)->layout); - spin_unlock(&inode->i_lock); + struct inode *inode = lo->plh_inode; + + if (atomic_dec_and_lock(&lo->plh_refcount, &inode->i_lock)) { + destroy_layout_hdr(lo); + spin_unlock(&inode->i_lock); + } } static void init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg) { - INIT_LIST_HEAD(&lseg->fi_list); - kref_init(&lseg->kref); - lseg->layout = lo; + INIT_LIST_HEAD(&lseg->pls_list); + atomic_set(&lseg->pls_refcount, 1); + smp_mb(); + set_bit(NFS_LSEG_VALID, &lseg->pls_flags); + lseg->pls_layout = lo; } -/* Called without i_lock held, as the free_lseg call may sleep */ -static void -destroy_lseg(struct kref *kref) +static void free_lseg(struct pnfs_layout_segment *lseg) { - struct pnfs_layout_segment *lseg = - container_of(kref, struct pnfs_layout_segment, kref); - struct inode *ino = lseg->layout->inode; + struct inode *ino = lseg->pls_layout->plh_inode; - dprintk("--> %s\n", __func__); NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); - /* Matched by get_layout_hdr_locked in pnfs_insert_layout */ - put_layout_hdr(ino); + /* Matched by get_layout_hdr in pnfs_insert_layout */ + put_layout_hdr(NFS_I(ino)->layout); } -static void -put_lseg(struct pnfs_layout_segment *lseg) +/* The use of tmp_list is necessary because pnfs_curr_ld->free_lseg + * could sleep, so must be called outside of the lock. + * Returns 1 if object was removed, otherwise return 0. + */ +static int +put_lseg_locked(struct pnfs_layout_segment *lseg, + struct list_head *tmp_list) +{ + dprintk("%s: lseg %p ref %d valid %d\n", __func__, lseg, + atomic_read(&lseg->pls_refcount), + test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); + if (atomic_dec_and_test(&lseg->pls_refcount)) { + struct inode *ino = lseg->pls_layout->plh_inode; + + BUG_ON(test_bit(NFS_LSEG_VALID, &lseg->pls_flags)); + list_del(&lseg->pls_list); + if (list_empty(&lseg->pls_layout->plh_segs)) { + struct nfs_client *clp; + + clp = NFS_SERVER(ino)->nfs_client; + spin_lock(&clp->cl_lock); + /* List does not take a reference, so no need for put here */ + list_del_init(&lseg->pls_layout->plh_layouts); + spin_unlock(&clp->cl_lock); + clear_bit(NFS_LAYOUT_BULK_RECALL, &lseg->pls_layout->plh_flags); + } + rpc_wake_up(&NFS_SERVER(ino)->roc_rpcwaitq); + list_add(&lseg->pls_list, tmp_list); + return 1; + } + return 0; +} + +static bool +should_free_lseg(u32 lseg_iomode, u32 recall_iomode) { - if (!lseg) - return; + return (recall_iomode == IOMODE_ANY || + lseg_iomode == recall_iomode); +} - dprintk("%s: lseg %p ref %d\n", __func__, lseg, - atomic_read(&lseg->kref.refcount)); - kref_put(&lseg->kref, destroy_lseg); +/* Returns 1 if lseg is removed from list, 0 otherwise */ +static int mark_lseg_invalid(struct pnfs_layout_segment *lseg, + struct list_head *tmp_list) +{ + int rv = 0; + + if (test_and_clear_bit(NFS_LSEG_VALID, &lseg->pls_flags)) { + /* Remove the reference keeping the lseg in the + * list. It will now be removed when all + * outstanding io is finished. + */ + rv = put_lseg_locked(lseg, tmp_list); + } + return rv; } -static void -pnfs_clear_lseg_list(struct pnfs_layout_hdr *lo, struct list_head *tmp_list) +/* Returns count of number of matching invalid lsegs remaining in list + * after call. + */ +int +mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, + struct list_head *tmp_list, + u32 iomode) { struct pnfs_layout_segment *lseg, *next; - struct nfs_client *clp; + int invalid = 0, removed = 0; dprintk("%s:Begin lo %p\n", __func__, lo); - assert_spin_locked(&lo->inode->i_lock); - list_for_each_entry_safe(lseg, next, &lo->segs, fi_list) { - dprintk("%s: freeing lseg %p\n", __func__, lseg); - list_move(&lseg->fi_list, tmp_list); - } - clp = NFS_SERVER(lo->inode)->nfs_client; - spin_lock(&clp->cl_lock); - /* List does not take a reference, so no need for put here */ - list_del_init(&lo->layouts); - spin_unlock(&clp->cl_lock); - write_seqlock(&lo->seqlock); - clear_bit(NFS_LAYOUT_STATEID_SET, &lo->state); - write_sequnlock(&lo->seqlock); - - dprintk("%s:Return\n", __func__); + list_for_each_entry_safe(lseg, next, &lo->plh_segs, pls_list) + if (should_free_lseg(lseg->pls_range.iomode, iomode)) { + dprintk("%s: freeing lseg %p iomode %d " + "offset %llu length %llu\n", __func__, + lseg, lseg->pls_range.iomode, lseg->pls_range.offset, + lseg->pls_range.length); + invalid++; + removed += mark_lseg_invalid(lseg, tmp_list); + } + dprintk("%s:Return %i\n", __func__, invalid - removed); + return invalid - removed; } -static void -pnfs_free_lseg_list(struct list_head *tmp_list) +void +pnfs_free_lseg_list(struct list_head *free_me) { - struct pnfs_layout_segment *lseg; + struct pnfs_layout_segment *lseg, *tmp; - while (!list_empty(tmp_list)) { - lseg = list_entry(tmp_list->next, struct pnfs_layout_segment, - fi_list); - dprintk("%s calling put_lseg on %p\n", __func__, lseg); - list_del(&lseg->fi_list); - put_lseg(lseg); + list_for_each_entry_safe(lseg, tmp, free_me, pls_list) { + list_del(&lseg->pls_list); + free_lseg(lseg); } } @@ -288,7 +332,8 @@ pnfs_destroy_layout(struct nfs_inode *nfsi) spin_lock(&nfsi->vfs_inode.i_lock); lo = nfsi->layout; if (lo) { - pnfs_clear_lseg_list(lo, &tmp_list); + set_bit(NFS_LAYOUT_DESTROYED, &nfsi->layout->plh_flags); + mark_matching_lsegs_invalid(lo, &tmp_list, IOMODE_ANY); /* Matched by refcount set to 1 in alloc_init_layout_hdr */ put_layout_hdr_locked(lo); } @@ -312,76 +357,80 @@ pnfs_destroy_all_layouts(struct nfs_client *clp) while (!list_empty(&tmp_list)) { lo = list_entry(tmp_list.next, struct pnfs_layout_hdr, - layouts); + plh_layouts); dprintk("%s freeing layout for inode %lu\n", __func__, - lo->inode->i_ino); - pnfs_destroy_layout(NFS_I(lo->inode)); + lo->plh_inode->i_ino); + pnfs_destroy_layout(NFS_I(lo->plh_inode)); } } -/* update lo->stateid with new if is more recent - * - * lo->stateid could be the open stateid, in which case we just use what given. - */ -static void -pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, - const nfs4_stateid *new) -{ - nfs4_stateid *old = &lo->stateid; - bool overwrite = false; - - write_seqlock(&lo->seqlock); - if (!test_bit(NFS_LAYOUT_STATEID_SET, &lo->state) || - memcmp(old->stateid.other, new->stateid.other, sizeof(new->stateid.other))) - overwrite = true; - else { - u32 oldseq, newseq; - - oldseq = be32_to_cpu(old->stateid.seqid); - newseq = be32_to_cpu(new->stateid.seqid); - if ((int)(newseq - oldseq) > 0) - overwrite = true; +/* update lo->plh_stateid with new if is more recent */ +void +pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new, + bool update_barrier) +{ + u32 oldseq, newseq; + + oldseq = be32_to_cpu(lo->plh_stateid.stateid.seqid); + newseq = be32_to_cpu(new->stateid.seqid); + if ((int)(newseq - oldseq) > 0) { + memcpy(&lo->plh_stateid, &new->stateid, sizeof(new->stateid)); + if (update_barrier) { + u32 new_barrier = be32_to_cpu(new->stateid.seqid); + + if ((int)(new_barrier - lo->plh_barrier)) + lo->plh_barrier = new_barrier; + } else { + /* Because of wraparound, we want to keep the barrier + * "close" to the current seqids. It needs to be + * within 2**31 to count as "behind", so if it + * gets too near that limit, give us a litle leeway + * and bring it to within 2**30. + * NOTE - and yes, this is all unsigned arithmetic. + */ + if (unlikely((newseq - lo->plh_barrier) > (3 << 29))) + lo->plh_barrier = newseq - (1 << 30); + } } - if (overwrite) - memcpy(&old->stateid, &new->stateid, sizeof(new->stateid)); - write_sequnlock(&lo->seqlock); } -static void -pnfs_layout_from_open_stateid(struct pnfs_layout_hdr *lo, - struct nfs4_state *state) +/* lget is set to 1 if called from inside send_layoutget call chain */ +static bool +pnfs_layoutgets_blocked(struct pnfs_layout_hdr *lo, nfs4_stateid *stateid, + int lget) { - int seq; - - dprintk("--> %s\n", __func__); - write_seqlock(&lo->seqlock); - do { - seq = read_seqbegin(&state->seqlock); - memcpy(lo->stateid.data, state->stateid.data, - sizeof(state->stateid.data)); - } while (read_seqretry(&state->seqlock, seq)); - set_bit(NFS_LAYOUT_STATEID_SET, &lo->state); - write_sequnlock(&lo->seqlock); - dprintk("<-- %s\n", __func__); + if ((stateid) && + (int)(lo->plh_barrier - be32_to_cpu(stateid->stateid.seqid)) >= 0) + return true; + return lo->plh_block_lgets || + test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) || + (list_empty(&lo->plh_segs) && + (atomic_read(&lo->plh_outstanding) > lget)); } -void -pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, - struct nfs4_state *open_state) +int +pnfs_choose_layoutget_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, + struct nfs4_state *open_state) { - int seq; + int status = 0; dprintk("--> %s\n", __func__); - do { - seq = read_seqbegin(&lo->seqlock); - if (!test_bit(NFS_LAYOUT_STATEID_SET, &lo->state)) { - /* This will trigger retry of the read */ - pnfs_layout_from_open_stateid(lo, open_state); - } else - memcpy(dst->data, lo->stateid.data, - sizeof(lo->stateid.data)); - } while (read_seqretry(&lo->seqlock, seq)); + spin_lock(&lo->plh_inode->i_lock); + if (pnfs_layoutgets_blocked(lo, NULL, 1)) { + status = -EAGAIN; + } else if (list_empty(&lo->plh_segs)) { + int seq; + + do { + seq = read_seqbegin(&open_state->seqlock); + memcpy(dst->data, open_state->stateid.data, + sizeof(open_state->stateid.data)); + } while (read_seqretry(&open_state->seqlock, seq)); + } else + memcpy(dst->data, lo->plh_stateid.data, sizeof(lo->plh_stateid.data)); + spin_unlock(&lo->plh_inode->i_lock); dprintk("<-- %s\n", __func__); + return status; } /* @@ -395,7 +444,7 @@ send_layoutget(struct pnfs_layout_hdr *lo, struct nfs_open_context *ctx, u32 iomode) { - struct inode *ino = lo->inode; + struct inode *ino = lo->plh_inode; struct nfs_server *server = NFS_SERVER(ino); struct nfs4_layoutget *lgp; struct pnfs_layout_segment *lseg = NULL; @@ -404,10 +453,8 @@ send_layoutget(struct pnfs_layout_hdr *lo, BUG_ON(ctx == NULL); lgp = kzalloc(sizeof(*lgp), GFP_KERNEL); - if (lgp == NULL) { - put_layout_hdr(lo->inode); + if (lgp == NULL) return NULL; - } lgp->args.minlength = NFS4_MAX_UINT64; lgp->args.maxcount = PNFS_LAYOUT_MAXSIZE; lgp->args.range.iomode = iomode; @@ -424,11 +471,88 @@ send_layoutget(struct pnfs_layout_hdr *lo, nfs4_proc_layoutget(lgp); if (!lseg) { /* remember that LAYOUTGET failed and suspend trying */ - set_bit(lo_fail_bit(iomode), &lo->state); + set_bit(lo_fail_bit(iomode), &lo->plh_flags); } return lseg; } +bool pnfs_roc(struct inode *ino) +{ + struct pnfs_layout_hdr *lo; + struct pnfs_layout_segment *lseg, *tmp; + LIST_HEAD(tmp_list); + bool found = false; + + spin_lock(&ino->i_lock); + lo = NFS_I(ino)->layout; + if (!lo || !test_and_clear_bit(NFS_LAYOUT_ROC, &lo->plh_flags) || + test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) + goto out_nolayout; + list_for_each_entry_safe(lseg, tmp, &lo->plh_segs, pls_list) + if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { + mark_lseg_invalid(lseg, &tmp_list); + found = true; + } + if (!found) + goto out_nolayout; + lo->plh_block_lgets++; + get_layout_hdr(lo); /* matched in pnfs_roc_release */ + spin_unlock(&ino->i_lock); + pnfs_free_lseg_list(&tmp_list); + return true; + +out_nolayout: + spin_unlock(&ino->i_lock); + return false; +} + +void pnfs_roc_release(struct inode *ino) +{ + struct pnfs_layout_hdr *lo; + + spin_lock(&ino->i_lock); + lo = NFS_I(ino)->layout; + lo->plh_block_lgets--; + put_layout_hdr_locked(lo); + spin_unlock(&ino->i_lock); +} + +void pnfs_roc_set_barrier(struct inode *ino, u32 barrier) +{ + struct pnfs_layout_hdr *lo; + + spin_lock(&ino->i_lock); + lo = NFS_I(ino)->layout; + if ((int)(barrier - lo->plh_barrier) > 0) + lo->plh_barrier = barrier; + spin_unlock(&ino->i_lock); +} + +bool pnfs_roc_drain(struct inode *ino, u32 *barrier) +{ + struct nfs_inode *nfsi = NFS_I(ino); + struct pnfs_layout_segment *lseg; + bool found = false; + + spin_lock(&ino->i_lock); + list_for_each_entry(lseg, &nfsi->layout->plh_segs, pls_list) + if (test_bit(NFS_LSEG_ROC, &lseg->pls_flags)) { + found = true; + break; + } + if (!found) { + struct pnfs_layout_hdr *lo = nfsi->layout; + u32 current_seqid = be32_to_cpu(lo->plh_stateid.stateid.seqid); + + /* Since close does not return a layout stateid for use as + * a barrier, we choose the worst-case barrier. + */ + *barrier = current_seqid + atomic_read(&lo->plh_outstanding); + } + spin_unlock(&ino->i_lock); + return found; +} + /* * Compare two layout segments for sorting into layout cache. * We want to preferentially return RW over RO layouts, so ensure those @@ -450,37 +574,29 @@ pnfs_insert_layout(struct pnfs_layout_hdr *lo, dprintk("%s:Begin\n", __func__); - assert_spin_locked(&lo->inode->i_lock); - if (list_empty(&lo->segs)) { - struct nfs_client *clp = NFS_SERVER(lo->inode)->nfs_client; - - spin_lock(&clp->cl_lock); - BUG_ON(!list_empty(&lo->layouts)); - list_add_tail(&lo->layouts, &clp->cl_layouts); - spin_unlock(&clp->cl_lock); - } - list_for_each_entry(lp, &lo->segs, fi_list) { - if (cmp_layout(lp->range.iomode, lseg->range.iomode) > 0) + assert_spin_locked(&lo->plh_inode->i_lock); + list_for_each_entry(lp, &lo->plh_segs, pls_list) { + if (cmp_layout(lp->pls_range.iomode, lseg->pls_range.iomode) > 0) continue; - list_add_tail(&lseg->fi_list, &lp->fi_list); + list_add_tail(&lseg->pls_list, &lp->pls_list); dprintk("%s: inserted lseg %p " "iomode %d offset %llu length %llu before " "lp %p iomode %d offset %llu length %llu\n", - __func__, lseg, lseg->range.iomode, - lseg->range.offset, lseg->range.length, - lp, lp->range.iomode, lp->range.offset, - lp->range.length); + __func__, lseg, lseg->pls_range.iomode, + lseg->pls_range.offset, lseg->pls_range.length, + lp, lp->pls_range.iomode, lp->pls_range.offset, + lp->pls_range.length); found = 1; break; } if (!found) { - list_add_tail(&lseg->fi_list, &lo->segs); + list_add_tail(&lseg->pls_list, &lo->plh_segs); dprintk("%s: inserted lseg %p " "iomode %d offset %llu length %llu at tail\n", - __func__, lseg, lseg->range.iomode, - lseg->range.offset, lseg->range.length); + __func__, lseg, lseg->pls_range.iomode, + lseg->pls_range.offset, lseg->pls_range.length); } - get_layout_hdr_locked(lo); + get_layout_hdr(lo); dprintk("%s:Return\n", __func__); } @@ -493,11 +609,11 @@ alloc_init_layout_hdr(struct inode *ino) lo = kzalloc(sizeof(struct pnfs_layout_hdr), GFP_KERNEL); if (!lo) return NULL; - lo->refcount = 1; - INIT_LIST_HEAD(&lo->layouts); - INIT_LIST_HEAD(&lo->segs); - seqlock_init(&lo->seqlock); - lo->inode = ino; + atomic_set(&lo->plh_refcount, 1); + INIT_LIST_HEAD(&lo->plh_layouts); + INIT_LIST_HEAD(&lo->plh_segs); + INIT_LIST_HEAD(&lo->plh_bulk_recall); + lo->plh_inode = ino; return lo; } @@ -510,9 +626,12 @@ pnfs_find_alloc_layout(struct inode *ino) dprintk("%s Begin ino=%p layout=%p\n", __func__, ino, nfsi->layout); assert_spin_locked(&ino->i_lock); - if (nfsi->layout) - return nfsi->layout; - + if (nfsi->layout) { + if (test_bit(NFS_LAYOUT_DESTROYED, &nfsi->layout->plh_flags)) + return NULL; + else + return nfsi->layout; + } spin_unlock(&ino->i_lock); new = alloc_init_layout_hdr(ino); spin_lock(&ino->i_lock); @@ -538,31 +657,32 @@ pnfs_find_alloc_layout(struct inode *ino) static int is_matching_lseg(struct pnfs_layout_segment *lseg, u32 iomode) { - return (iomode != IOMODE_RW || lseg->range.iomode == IOMODE_RW); + return (iomode != IOMODE_RW || lseg->pls_range.iomode == IOMODE_RW); } /* * lookup range in layout */ static struct pnfs_layout_segment * -pnfs_has_layout(struct pnfs_layout_hdr *lo, u32 iomode) +pnfs_find_lseg(struct pnfs_layout_hdr *lo, u32 iomode) { struct pnfs_layout_segment *lseg, *ret = NULL; dprintk("%s:Begin\n", __func__); - assert_spin_locked(&lo->inode->i_lock); - list_for_each_entry(lseg, &lo->segs, fi_list) { - if (is_matching_lseg(lseg, iomode)) { + assert_spin_locked(&lo->plh_inode->i_lock); + list_for_each_entry(lseg, &lo->plh_segs, pls_list) { + if (test_bit(NFS_LSEG_VALID, &lseg->pls_flags) && + is_matching_lseg(lseg, iomode)) { ret = lseg; break; } - if (cmp_layout(iomode, lseg->range.iomode) > 0) + if (cmp_layout(iomode, lseg->pls_range.iomode) > 0) break; } dprintk("%s:Return lseg %p ref %d\n", - __func__, ret, ret ? atomic_read(&ret->kref.refcount) : 0); + __func__, ret, ret ? atomic_read(&ret->pls_refcount) : 0); return ret; } @@ -576,6 +696,7 @@ pnfs_update_layout(struct inode *ino, enum pnfs_iomode iomode) { struct nfs_inode *nfsi = NFS_I(ino); + struct nfs_client *clp = NFS_SERVER(ino)->nfs_client; struct pnfs_layout_hdr *lo; struct pnfs_layout_segment *lseg = NULL; @@ -588,25 +709,53 @@ pnfs_update_layout(struct inode *ino, goto out_unlock; } - /* Check to see if the layout for the given range already exists */ - lseg = pnfs_has_layout(lo, iomode); - if (lseg) { - dprintk("%s: Using cached lseg %p for iomode %d)\n", - __func__, lseg, iomode); + /* Do we even need to bother with this? */ + if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) || + test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { + dprintk("%s matches recall, use MDS\n", __func__); goto out_unlock; } + /* Check to see if the layout for the given range already exists */ + lseg = pnfs_find_lseg(lo, iomode); + if (lseg) + goto out_unlock; /* if LAYOUTGET already failed once we don't try again */ - if (test_bit(lo_fail_bit(iomode), &nfsi->layout->state)) + if (test_bit(lo_fail_bit(iomode), &nfsi->layout->plh_flags)) + goto out_unlock; + + if (pnfs_layoutgets_blocked(lo, NULL, 0)) goto out_unlock; + atomic_inc(&lo->plh_outstanding); - get_layout_hdr_locked(lo); /* Matched in nfs4_layoutget_release */ + get_layout_hdr(lo); + if (list_empty(&lo->plh_segs)) { + /* The lo must be on the clp list if there is any + * chance of a CB_LAYOUTRECALL(FILE) coming in. + */ + spin_lock(&clp->cl_lock); + BUG_ON(!list_empty(&lo->plh_layouts)); + list_add_tail(&lo->plh_layouts, &clp->cl_layouts); + spin_unlock(&clp->cl_lock); + } spin_unlock(&ino->i_lock); lseg = send_layoutget(lo, ctx, iomode); + if (!lseg) { + spin_lock(&ino->i_lock); + if (list_empty(&lo->plh_segs)) { + spin_lock(&clp->cl_lock); + list_del_init(&lo->plh_layouts); + spin_unlock(&clp->cl_lock); + clear_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags); + } + spin_unlock(&ino->i_lock); + } + atomic_dec(&lo->plh_outstanding); + put_layout_hdr(lo); out: dprintk("%s end, state 0x%lx lseg %p\n", __func__, - nfsi->layout->state, lseg); + nfsi->layout->plh_flags, lseg); return lseg; out_unlock: spin_unlock(&ino->i_lock); @@ -619,9 +768,21 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout; struct nfs4_layoutget_res *res = &lgp->res; struct pnfs_layout_segment *lseg; - struct inode *ino = lo->inode; + struct inode *ino = lo->plh_inode; + struct nfs_client *clp = NFS_SERVER(ino)->nfs_client; int status = 0; + /* Verify we got what we asked for. + * Note that because the xdr parsing only accepts a single + * element array, this can fail even if the server is behaving + * correctly. + */ + if (lgp->args.range.iomode > res->range.iomode || + res->range.offset != 0 || + res->range.length != NFS4_MAX_UINT64) { + status = -EINVAL; + goto out; + } /* Inject layout blob into I/O device driver */ lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res); if (!lseg || IS_ERR(lseg)) { @@ -635,16 +796,37 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) } spin_lock(&ino->i_lock); + if (test_bit(NFS4CLNT_LAYOUTRECALL, &clp->cl_state) || + test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags)) { + dprintk("%s forget reply due to recall\n", __func__); + goto out_forget_reply; + } + + if (pnfs_layoutgets_blocked(lo, &res->stateid, 1)) { + dprintk("%s forget reply due to state\n", __func__); + goto out_forget_reply; + } init_lseg(lo, lseg); - lseg->range = res->range; + lseg->pls_range = res->range; *lgp->lsegpp = lseg; pnfs_insert_layout(lo, lseg); + if (res->return_on_close) { + set_bit(NFS_LSEG_ROC, &lseg->pls_flags); + set_bit(NFS_LAYOUT_ROC, &lo->plh_flags); + } + /* Done processing layoutget. Set the layout stateid */ - pnfs_set_layout_stateid(lo, &res->stateid); + pnfs_set_layout_stateid(lo, &res->stateid, false); spin_unlock(&ino->i_lock); out: return status; + +out_forget_reply: + spin_unlock(&ino->i_lock); + lseg->pls_layout = lo; + NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg); + goto out; } /* diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index e12367d..e2612ea 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -30,11 +30,17 @@ #ifndef FS_NFS_PNFS_H #define FS_NFS_PNFS_H +enum { + NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ + NFS_LSEG_ROC, /* roc bit received from server */ +}; + struct pnfs_layout_segment { - struct list_head fi_list; - struct pnfs_layout_range range; - struct kref kref; - struct pnfs_layout_hdr *layout; + struct list_head pls_list; + struct pnfs_layout_range pls_range; + atomic_t pls_refcount; + unsigned long pls_flags; + struct pnfs_layout_hdr *pls_layout; }; #ifdef CONFIG_NFS_V4_1 @@ -44,7 +50,9 @@ struct pnfs_layout_segment { enum { NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ - NFS_LAYOUT_STATEID_SET, /* have a valid layout stateid */ + NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ + NFS_LAYOUT_ROC, /* some lseg had roc bit set */ + NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */ }; /* Per-layout driver specific registration structure */ @@ -60,13 +68,16 @@ struct pnfs_layoutdriver_type { }; struct pnfs_layout_hdr { - unsigned long refcount; - struct list_head layouts; /* other client layouts */ - struct list_head segs; /* layout segments list */ - seqlock_t seqlock; /* Protects the stateid */ - nfs4_stateid stateid; - unsigned long state; - struct inode *inode; + atomic_t plh_refcount; + struct list_head plh_layouts; /* other client layouts */ + struct list_head plh_bulk_recall; /* clnt list of bulk recalls */ + struct list_head plh_segs; /* layout segments list */ + nfs4_stateid plh_stateid; + atomic_t plh_outstanding; /* number of RPCs out */ + unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ + u32 plh_barrier; /* ignore lower seqids */ + unsigned long plh_flags; + struct inode *plh_inode; }; struct pnfs_device { @@ -134,17 +145,30 @@ extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, extern int nfs4_proc_layoutget(struct nfs4_layoutget *lgp); /* pnfs.c */ +void get_layout_hdr(struct pnfs_layout_hdr *lo); struct pnfs_layout_segment * pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, enum pnfs_iomode access_type); void set_pnfs_layoutdriver(struct nfs_server *, u32 id); void unset_pnfs_layoutdriver(struct nfs_server *); int pnfs_layout_process(struct nfs4_layoutget *lgp); +void pnfs_free_lseg_list(struct list_head *tmp_list); void pnfs_destroy_layout(struct nfs_inode *); void pnfs_destroy_all_layouts(struct nfs_client *); -void put_layout_hdr(struct inode *inode); -void pnfs_get_layout_stateid(nfs4_stateid *dst, struct pnfs_layout_hdr *lo, - struct nfs4_state *open_state); +void put_layout_hdr(struct pnfs_layout_hdr *lo); +void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, + const nfs4_stateid *new, + bool update_barrier); +int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, + struct pnfs_layout_hdr *lo, + struct nfs4_state *open_state); +int mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, + struct list_head *tmp_list, + u32 iomode); +bool pnfs_roc(struct inode *ino); +void pnfs_roc_release(struct inode *ino); +void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); +bool pnfs_roc_drain(struct inode *ino, u32 *barrier); static inline int lo_fail_bit(u32 iomode) @@ -176,6 +200,28 @@ pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, return NULL; } +static inline bool +pnfs_roc(struct inode *ino) +{ + return false; +} + +static inline void +pnfs_roc_release(struct inode *ino) +{ +} + +static inline void +pnfs_roc_set_barrier(struct inode *ino, u32 barrier) +{ +} + +static inline bool +pnfs_roc_drain(struct inode *ino, u32 *barrier) +{ + return false; +} + static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id) { } diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index 58e7f84..77d5e21 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -458,7 +458,7 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, fattr = nfs_alloc_fattr(); status = -ENOMEM; if (fh == NULL || fattr == NULL) - goto out; + goto out_free; status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); nfs_mark_for_revalidate(dir); @@ -471,6 +471,7 @@ nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, if (status == 0) status = nfs_instantiate(dentry, fh, fattr); +out_free: nfs_free_fattr(fattr); nfs_free_fhandle(fh); out: @@ -731,7 +732,7 @@ const struct nfs_rpc_ops nfs_v2_clientops = { .statfs = nfs_proc_statfs, .fsinfo = nfs_proc_fsinfo, .pathconf = nfs_proc_pathconf, - .decode_dirent = nfs_decode_dirent, + .decode_dirent = nfs2_decode_dirent, .read_setup = nfs_proc_read_setup, .read_done = nfs_read_done, .write_setup = nfs_proc_write_setup, diff --git a/fs/nfs/read.c b/fs/nfs/read.c index e4b62c6..aedcaa7 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -152,7 +152,6 @@ static void nfs_readpage_release(struct nfs_page *req) (long long)NFS_FILEID(req->wb_context->path.dentry->d_inode), req->wb_bytes, (long long)req_offset(req)); - nfs_clear_request(req); nfs_release_request(req); } diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 3600ec7..0f9ea73 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -39,7 +39,6 @@ #include <linux/nfs_mount.h> #include <linux/nfs4_mount.h> #include <linux/lockd/bind.h> -#include <linux/smp_lock.h> #include <linux/seq_file.h> #include <linux/mount.h> #include <linux/mnt_namespace.h> @@ -67,6 +66,12 @@ #define NFSDBG_FACILITY NFSDBG_VFS +#ifdef CONFIG_NFS_V3 +#define NFS_DEFAULT_VERSION 3 +#else +#define NFS_DEFAULT_VERSION 2 +#endif + enum { /* Mount options that take no arguments */ Opt_soft, Opt_hard, @@ -260,8 +265,8 @@ static int nfs_statfs(struct dentry *, struct kstatfs *); static int nfs_show_options(struct seq_file *, struct vfsmount *); static int nfs_show_stats(struct seq_file *, struct vfsmount *); static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); -static int nfs_xdev_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); +static struct dentry *nfs_xdev_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); static void nfs_put_super(struct super_block *); static void nfs_kill_super(struct super_block *); static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); @@ -277,7 +282,7 @@ static struct file_system_type nfs_fs_type = { struct file_system_type nfs_xdev_fs_type = { .owner = THIS_MODULE, .name = "nfs", - .get_sb = nfs_xdev_get_sb, + .mount = nfs_xdev_mount, .kill_sb = nfs_kill_super, .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; @@ -302,14 +307,14 @@ static int nfs4_try_mount(int flags, const char *dev_name, struct nfs_parsed_mount_data *data, struct vfsmount *mnt); static int nfs4_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); -static int nfs4_remote_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); -static int nfs4_xdev_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); +static struct dentry *nfs4_remote_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); +static struct dentry *nfs4_xdev_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); static int nfs4_referral_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); -static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); +static struct dentry *nfs4_remote_referral_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *raw_data); static void nfs4_kill_super(struct super_block *sb); static struct file_system_type nfs4_fs_type = { @@ -323,7 +328,7 @@ static struct file_system_type nfs4_fs_type = { static struct file_system_type nfs4_remote_fs_type = { .owner = THIS_MODULE, .name = "nfs4", - .get_sb = nfs4_remote_get_sb, + .mount = nfs4_remote_mount, .kill_sb = nfs4_kill_super, .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; @@ -331,7 +336,7 @@ static struct file_system_type nfs4_remote_fs_type = { struct file_system_type nfs4_xdev_fs_type = { .owner = THIS_MODULE, .name = "nfs4", - .get_sb = nfs4_xdev_get_sb, + .mount = nfs4_xdev_mount, .kill_sb = nfs4_kill_super, .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; @@ -339,7 +344,7 @@ struct file_system_type nfs4_xdev_fs_type = { static struct file_system_type nfs4_remote_referral_fs_type = { .owner = THIS_MODULE, .name = "nfs4", - .get_sb = nfs4_remote_referral_get_sb, + .mount = nfs4_remote_referral_mount, .kill_sb = nfs4_kill_super, .fs_flags = FS_RENAME_DOES_D_MOVE|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, }; @@ -593,7 +598,9 @@ static void nfs_show_mountd_options(struct seq_file *m, struct nfs_server *nfss, if (nfss->mountd_version || showdefaults) seq_printf(m, ",mountvers=%u", nfss->mountd_version); - if (nfss->mountd_port || showdefaults) + if ((nfss->mountd_port && + nfss->mountd_port != (unsigned short)NFS_UNSPEC_PORT) || + showdefaults) seq_printf(m, ",mountport=%u", nfss->mountd_port); nfs_show_mountd_netid(m, nfss, showdefaults); @@ -1064,12 +1071,10 @@ static int nfs_parse_mount_options(char *raw, mnt->flags |= NFS_MOUNT_VER3; mnt->version = 3; break; -#ifdef CONFIG_NFS_V4 case Opt_v4: mnt->flags &= ~NFS_MOUNT_VER3; mnt->version = 4; break; -#endif case Opt_udp: mnt->flags &= ~NFS_MOUNT_TCP; mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP; @@ -1281,12 +1286,10 @@ static int nfs_parse_mount_options(char *raw, mnt->flags |= NFS_MOUNT_VER3; mnt->version = 3; break; -#ifdef CONFIG_NFS_V4 case NFS4_VERSION: mnt->flags &= ~NFS_MOUNT_VER3; mnt->version = 4; break; -#endif default: goto out_invalid_value; } @@ -2277,7 +2280,7 @@ static int nfs_get_sb(struct file_system_type *fs_type, }; int error = -ENOMEM; - data = nfs_alloc_parsed_mount_data(3); + data = nfs_alloc_parsed_mount_data(NFS_DEFAULT_VERSION); mntfh = nfs_alloc_fhandle(); if (data == NULL || mntfh == NULL) goto out_free_fh; @@ -2397,9 +2400,9 @@ static void nfs_kill_super(struct super_block *s) /* * Clone an NFS2/3 server record on xdev traversal (FSID-change) */ -static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data, - struct vfsmount *mnt) +static struct dentry * +nfs_xdev_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; struct super_block *s; @@ -2411,7 +2414,7 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, }; int error; - dprintk("--> nfs_xdev_get_sb()\n"); + dprintk("--> nfs_xdev_mount()\n"); /* create a new volume representation */ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); @@ -2458,28 +2461,26 @@ static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, } s->s_flags |= MS_ACTIVE; - mnt->mnt_sb = s; - mnt->mnt_root = mntroot; /* clone any lsm security options from the parent to the new sb */ security_sb_clone_mnt_opts(data->sb, s); - dprintk("<-- nfs_xdev_get_sb() = 0\n"); - return 0; + dprintk("<-- nfs_xdev_mount() = 0\n"); + return mntroot; out_err_nosb: nfs_free_server(server); out_err_noserver: - dprintk("<-- nfs_xdev_get_sb() = %d [error]\n", error); - return error; + dprintk("<-- nfs_xdev_mount() = %d [error]\n", error); + return ERR_PTR(error); error_splat_super: if (server && !s->s_root) bdi_unregister(&server->backing_dev_info); error_splat_bdi: deactivate_locked_super(s); - dprintk("<-- nfs_xdev_get_sb() = %d [splat]\n", error); - return error; + dprintk("<-- nfs_xdev_mount() = %d [splat]\n", error); + return ERR_PTR(error); } #ifdef CONFIG_NFS_V4 @@ -2495,7 +2496,13 @@ static void nfs4_clone_super(struct super_block *sb, sb->s_maxbytes = old_sb->s_maxbytes; sb->s_time_gran = 1; sb->s_op = old_sb->s_op; - nfs_initialise_sb(sb); + /* + * The VFS shouldn't apply the umask to mode bits. We will do + * so ourselves when necessary. + */ + sb->s_flags |= MS_POSIXACL; + sb->s_xattr = old_sb->s_xattr; + nfs_initialise_sb(sb); } /* @@ -2505,6 +2512,12 @@ static void nfs4_fill_super(struct super_block *sb) { sb->s_time_gran = 1; sb->s_op = &nfs4_sops; + /* + * The VFS shouldn't apply the umask to mode bits. We will do + * so ourselves when necessary. + */ + sb->s_flags |= MS_POSIXACL; + sb->s_xattr = nfs4_xattr_handlers; nfs_initialise_sb(sb); } @@ -2649,8 +2662,9 @@ out_no_address: /* * Get the superblock for the NFS4 root partition */ -static int nfs4_remote_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) +static struct dentry * +nfs4_remote_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { struct nfs_parsed_mount_data *data = raw_data; struct super_block *s; @@ -2714,15 +2728,16 @@ static int nfs4_remote_get_sb(struct file_system_type *fs_type, goto error_splat_root; s->s_flags |= MS_ACTIVE; - mnt->mnt_sb = s; - mnt->mnt_root = mntroot; - error = 0; + + security_free_mnt_opts(&data->lsm_opts); + nfs_free_fhandle(mntfh); + return mntroot; out: security_free_mnt_opts(&data->lsm_opts); out_free_fh: nfs_free_fhandle(mntfh); - return error; + return ERR_PTR(error); out_free: nfs_free_server(server); @@ -2968,9 +2983,9 @@ static void nfs4_kill_super(struct super_block *sb) /* * Clone an NFS4 server record on xdev traversal (FSID-change) */ -static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *raw_data, - struct vfsmount *mnt) +static struct dentry * +nfs4_xdev_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; struct super_block *s; @@ -2982,7 +2997,7 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, }; int error; - dprintk("--> nfs4_xdev_get_sb()\n"); + dprintk("--> nfs4_xdev_mount()\n"); /* create a new volume representation */ server = nfs_clone_server(NFS_SB(data->sb), data->fh, data->fattr); @@ -3029,32 +3044,30 @@ static int nfs4_xdev_get_sb(struct file_system_type *fs_type, int flags, } s->s_flags |= MS_ACTIVE; - mnt->mnt_sb = s; - mnt->mnt_root = mntroot; security_sb_clone_mnt_opts(data->sb, s); - dprintk("<-- nfs4_xdev_get_sb() = 0\n"); - return 0; + dprintk("<-- nfs4_xdev_mount() = 0\n"); + return mntroot; out_err_nosb: nfs_free_server(server); out_err_noserver: - dprintk("<-- nfs4_xdev_get_sb() = %d [error]\n", error); - return error; + dprintk("<-- nfs4_xdev_mount() = %d [error]\n", error); + return ERR_PTR(error); error_splat_super: if (server && !s->s_root) bdi_unregister(&server->backing_dev_info); error_splat_bdi: deactivate_locked_super(s); - dprintk("<-- nfs4_xdev_get_sb() = %d [splat]\n", error); - return error; + dprintk("<-- nfs4_xdev_mount() = %d [splat]\n", error); + return ERR_PTR(error); } -static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *raw_data, - struct vfsmount *mnt) +static struct dentry * +nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; struct super_block *s; @@ -3118,14 +3131,12 @@ static int nfs4_remote_referral_get_sb(struct file_system_type *fs_type, } s->s_flags |= MS_ACTIVE; - mnt->mnt_sb = s; - mnt->mnt_root = mntroot; security_sb_clone_mnt_opts(data->sb, s); nfs_free_fhandle(mntfh); dprintk("<-- nfs4_referral_get_sb() = 0\n"); - return 0; + return mntroot; out_err_nosb: nfs_free_server(server); @@ -3133,7 +3144,7 @@ out_err_noserver: nfs_free_fhandle(mntfh); out_err_nofh: dprintk("<-- nfs4_referral_get_sb() = %d [error]\n", error); - return error; + return ERR_PTR(error); error_splat_super: if (server && !s->s_root) @@ -3142,7 +3153,7 @@ error_splat_bdi: deactivate_locked_super(s); nfs_free_fhandle(mntfh); dprintk("<-- nfs4_referral_get_sb() = %d [splat]\n", error); - return error; + return ERR_PTR(error); } /* diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c index 9a16bad..e313a51 100644 --- a/fs/nfs/unlink.c +++ b/fs/nfs/unlink.c @@ -429,7 +429,7 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir, data = kzalloc(sizeof(*data), GFP_KERNEL); if (data == NULL) return ERR_PTR(-ENOMEM); - task_setup_data.callback_data = data, + task_setup_data.callback_data = data; data->cred = rpc_lookup_cred(); if (IS_ERR(data->cred)) { @@ -444,9 +444,9 @@ nfs_async_rename(struct inode *old_dir, struct inode *new_dir, /* set up nfs_renamedata */ data->old_dir = old_dir; - atomic_inc(&old_dir->i_count); + ihold(old_dir); data->new_dir = new_dir; - atomic_inc(&new_dir->i_count); + ihold(new_dir); data->old_dentry = dget(old_dentry); data->new_dentry = dget(new_dentry); nfs_fattr_init(&data->old_fattr); @@ -496,7 +496,7 @@ nfs_sillyrename(struct inode *dir, struct dentry *dentry) dfprintk(VFS, "NFS: silly-rename(%s/%s, ct=%d)\n", dentry->d_parent->d_name.name, dentry->d_name.name, - atomic_read(&dentry->d_count)); + dentry->d_count); nfs_inc_stats(dir, NFSIOS_SILLYRENAME); /* diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 4c14c17..10d648ea 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -390,6 +390,7 @@ static int nfs_inode_add_request(struct inode *inode, struct nfs_page *req) if (nfs_have_delegation(inode, FMODE_WRITE)) nfsi->change_attr++; } + set_bit(PG_MAPPED, &req->wb_flags); SetPagePrivate(req->wb_page); set_page_private(req->wb_page, (unsigned long)req); nfsi->npages++; @@ -415,6 +416,7 @@ static void nfs_inode_remove_request(struct nfs_page *req) spin_lock(&inode->i_lock); set_page_private(req->wb_page, 0); ClearPagePrivate(req->wb_page); + clear_bit(PG_MAPPED, &req->wb_flags); radix_tree_delete(&nfsi->nfs_page_tree, req->wb_index); nfsi->npages--; if (!nfsi->npages) { @@ -422,7 +424,6 @@ static void nfs_inode_remove_request(struct nfs_page *req) iput(inode); } else spin_unlock(&inode->i_lock); - nfs_clear_request(req); nfs_release_request(req); } diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index 2a533a0..7e84a85 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -260,9 +260,11 @@ void fill_post_wcc(struct svc_fh *fhp) err = vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry, &fhp->fh_post_attr); fhp->fh_post_change = fhp->fh_dentry->d_inode->i_version; - if (err) + if (err) { fhp->fh_post_saved = 0; - else + /* Grab the ctime anyway - set_change_info might use it */ + fhp->fh_post_attr.ctime = fhp->fh_dentry->d_inode->i_ctime; + } else fhp->fh_post_saved = 1; } diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 143da2e..21a63da 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -50,11 +50,6 @@ enum { NFSPROC4_CLNT_CB_SEQUENCE, }; -enum nfs_cb_opnum4 { - OP_CB_RECALL = 4, - OP_CB_SEQUENCE = 11, -}; - #define NFS4_MAXTAGLEN 20 #define NFS4_enc_cb_null_sz 0 @@ -79,61 +74,6 @@ enum nfs_cb_opnum4 { cb_sequence_dec_sz + \ op_dec_sz) -/* -* Generic encode routines from fs/nfs/nfs4xdr.c -*/ -static inline __be32 * -xdr_writemem(__be32 *p, const void *ptr, int nbytes) -{ - int tmp = XDR_QUADLEN(nbytes); - if (!tmp) - return p; - p[tmp-1] = 0; - memcpy(p, ptr, nbytes); - return p + tmp; -} - -#define WRITE32(n) *p++ = htonl(n) -#define WRITEMEM(ptr,nbytes) do { \ - p = xdr_writemem(p, ptr, nbytes); \ -} while (0) -#define RESERVE_SPACE(nbytes) do { \ - p = xdr_reserve_space(xdr, nbytes); \ - if (!p) dprintk("NFSD: RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __func__); \ - BUG_ON(!p); \ -} while (0) - -/* - * Generic decode routines from fs/nfs/nfs4xdr.c - */ -#define DECODE_TAIL \ - status = 0; \ -out: \ - return status; \ -xdr_error: \ - dprintk("NFSD: xdr error! (%s:%d)\n", __FILE__, __LINE__); \ - status = -EIO; \ - goto out - -#define READ32(x) (x) = ntohl(*p++) -#define READ64(x) do { \ - (x) = (u64)ntohl(*p++) << 32; \ - (x) |= ntohl(*p++); \ -} while (0) -#define READTIME(x) do { \ - p++; \ - (x.tv_sec) = ntohl(*p++); \ - (x.tv_nsec) = ntohl(*p++); \ -} while (0) -#define READ_BUF(nbytes) do { \ - p = xdr_inline_decode(xdr, nbytes); \ - if (!p) { \ - dprintk("NFSD: %s: reply buffer overflowed in line %d.\n", \ - __func__, __LINE__); \ - return -EIO; \ - } \ -} while (0) - struct nfs4_cb_compound_hdr { /* args */ u32 ident; /* minorversion 0 only */ @@ -144,295 +84,513 @@ struct nfs4_cb_compound_hdr { int status; }; -static struct { -int stat; -int errno; -} nfs_cb_errtbl[] = { - { NFS4_OK, 0 }, - { NFS4ERR_PERM, EPERM }, - { NFS4ERR_NOENT, ENOENT }, - { NFS4ERR_IO, EIO }, - { NFS4ERR_NXIO, ENXIO }, - { NFS4ERR_ACCESS, EACCES }, - { NFS4ERR_EXIST, EEXIST }, - { NFS4ERR_XDEV, EXDEV }, - { NFS4ERR_NOTDIR, ENOTDIR }, - { NFS4ERR_ISDIR, EISDIR }, - { NFS4ERR_INVAL, EINVAL }, - { NFS4ERR_FBIG, EFBIG }, - { NFS4ERR_NOSPC, ENOSPC }, - { NFS4ERR_ROFS, EROFS }, - { NFS4ERR_MLINK, EMLINK }, - { NFS4ERR_NAMETOOLONG, ENAMETOOLONG }, - { NFS4ERR_NOTEMPTY, ENOTEMPTY }, - { NFS4ERR_DQUOT, EDQUOT }, - { NFS4ERR_STALE, ESTALE }, - { NFS4ERR_BADHANDLE, EBADHANDLE }, - { NFS4ERR_BAD_COOKIE, EBADCOOKIE }, - { NFS4ERR_NOTSUPP, ENOTSUPP }, - { NFS4ERR_TOOSMALL, ETOOSMALL }, - { NFS4ERR_SERVERFAULT, ESERVERFAULT }, - { NFS4ERR_BADTYPE, EBADTYPE }, - { NFS4ERR_LOCKED, EAGAIN }, - { NFS4ERR_RESOURCE, EREMOTEIO }, - { NFS4ERR_SYMLINK, ELOOP }, - { NFS4ERR_OP_ILLEGAL, EOPNOTSUPP }, - { NFS4ERR_DEADLOCK, EDEADLK }, - { -1, EIO } -}; +/* + * Handle decode buffer overflows out-of-line. + */ +static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) +{ + dprintk("NFS: %s prematurely hit the end of our receive buffer. " + "Remaining buffer length is %tu words.\n", + func, xdr->end - xdr->p); +} -static int -nfs_cb_stat_to_errno(int stat) +static __be32 *xdr_encode_empty_array(__be32 *p) { - int i; - for (i = 0; nfs_cb_errtbl[i].stat != -1; i++) { - if (nfs_cb_errtbl[i].stat == stat) - return nfs_cb_errtbl[i].errno; - } - /* If we cannot translate the error, the recovery routines should - * handle it. - * Note: remaining NFSv4 error codes have values > 10000, so should - * not conflict with native Linux error codes. - */ - return stat; + *p++ = xdr_zero; + return p; } /* - * XDR encode + * Encode/decode NFSv4 CB basic data types + * + * Basic NFSv4 callback data types are defined in section 15 of RFC + * 3530: "Network File System (NFS) version 4 Protocol" and section + * 20 of RFC 5661: "Network File System (NFS) Version 4 Minor Version + * 1 Protocol" + */ + +/* + * nfs_cb_opnum4 + * + * enum nfs_cb_opnum4 { + * OP_CB_GETATTR = 3, + * ... + * }; */ +enum nfs_cb_opnum4 { + OP_CB_GETATTR = 3, + OP_CB_RECALL = 4, + OP_CB_LAYOUTRECALL = 5, + OP_CB_NOTIFY = 6, + OP_CB_PUSH_DELEG = 7, + OP_CB_RECALL_ANY = 8, + OP_CB_RECALLABLE_OBJ_AVAIL = 9, + OP_CB_RECALL_SLOT = 10, + OP_CB_SEQUENCE = 11, + OP_CB_WANTS_CANCELLED = 12, + OP_CB_NOTIFY_LOCK = 13, + OP_CB_NOTIFY_DEVICEID = 14, + OP_CB_ILLEGAL = 10044 +}; -static void -encode_stateid(struct xdr_stream *xdr, stateid_t *sid) +static void encode_nfs_cb_opnum4(struct xdr_stream *xdr, enum nfs_cb_opnum4 op) { __be32 *p; - RESERVE_SPACE(sizeof(stateid_t)); - WRITE32(sid->si_generation); - WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); + p = xdr_reserve_space(xdr, 4); + *p = cpu_to_be32(op); } -static void -encode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr) +/* + * nfs_fh4 + * + * typedef opaque nfs_fh4<NFS4_FHSIZE>; + */ +static void encode_nfs_fh4(struct xdr_stream *xdr, const struct knfsd_fh *fh) { - __be32 * p; + u32 length = fh->fh_size; + __be32 *p; - RESERVE_SPACE(16); - WRITE32(0); /* tag length is always 0 */ - WRITE32(hdr->minorversion); - WRITE32(hdr->ident); - hdr->nops_p = p; - WRITE32(hdr->nops); + BUG_ON(length > NFS4_FHSIZE); + p = xdr_reserve_space(xdr, 4 + length); + xdr_encode_opaque(p, &fh->fh_base, length); } -static void encode_cb_nops(struct nfs4_cb_compound_hdr *hdr) +/* + * stateid4 + * + * struct stateid4 { + * uint32_t seqid; + * opaque other[12]; + * }; + */ +static void encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid) { - *hdr->nops_p = htonl(hdr->nops); + __be32 *p; + + p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE); + *p++ = cpu_to_be32(sid->si_generation); + xdr_encode_opaque_fixed(p, &sid->si_opaque, NFS4_STATEID_OTHER_SIZE); } -static void -encode_cb_recall(struct xdr_stream *xdr, struct nfs4_delegation *dp, - struct nfs4_cb_compound_hdr *hdr) +/* + * sessionid4 + * + * typedef opaque sessionid4[NFS4_SESSIONID_SIZE]; + */ +static void encode_sessionid4(struct xdr_stream *xdr, + const struct nfsd4_session *session) { __be32 *p; - int len = dp->dl_fh.fh_size; - - RESERVE_SPACE(4); - WRITE32(OP_CB_RECALL); - encode_stateid(xdr, &dp->dl_stateid); - RESERVE_SPACE(8 + (XDR_QUADLEN(len) << 2)); - WRITE32(0); /* truncate optimization not implemented */ - WRITE32(len); - WRITEMEM(&dp->dl_fh.fh_base, len); - hdr->nops++; + + p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN); + xdr_encode_opaque_fixed(p, session->se_sessionid.data, + NFS4_MAX_SESSIONID_LEN); } -static void -encode_cb_sequence(struct xdr_stream *xdr, struct nfsd4_callback *cb, - struct nfs4_cb_compound_hdr *hdr) -{ - __be32 *p; - struct nfsd4_session *ses = cb->cb_clp->cl_cb_session; +/* + * nfsstat4 + */ +static const struct { + int stat; + int errno; +} nfs_cb_errtbl[] = { + { NFS4_OK, 0 }, + { NFS4ERR_PERM, -EPERM }, + { NFS4ERR_NOENT, -ENOENT }, + { NFS4ERR_IO, -EIO }, + { NFS4ERR_NXIO, -ENXIO }, + { NFS4ERR_ACCESS, -EACCES }, + { NFS4ERR_EXIST, -EEXIST }, + { NFS4ERR_XDEV, -EXDEV }, + { NFS4ERR_NOTDIR, -ENOTDIR }, + { NFS4ERR_ISDIR, -EISDIR }, + { NFS4ERR_INVAL, -EINVAL }, + { NFS4ERR_FBIG, -EFBIG }, + { NFS4ERR_NOSPC, -ENOSPC }, + { NFS4ERR_ROFS, -EROFS }, + { NFS4ERR_MLINK, -EMLINK }, + { NFS4ERR_NAMETOOLONG, -ENAMETOOLONG }, + { NFS4ERR_NOTEMPTY, -ENOTEMPTY }, + { NFS4ERR_DQUOT, -EDQUOT }, + { NFS4ERR_STALE, -ESTALE }, + { NFS4ERR_BADHANDLE, -EBADHANDLE }, + { NFS4ERR_BAD_COOKIE, -EBADCOOKIE }, + { NFS4ERR_NOTSUPP, -ENOTSUPP }, + { NFS4ERR_TOOSMALL, -ETOOSMALL }, + { NFS4ERR_SERVERFAULT, -ESERVERFAULT }, + { NFS4ERR_BADTYPE, -EBADTYPE }, + { NFS4ERR_LOCKED, -EAGAIN }, + { NFS4ERR_RESOURCE, -EREMOTEIO }, + { NFS4ERR_SYMLINK, -ELOOP }, + { NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP }, + { NFS4ERR_DEADLOCK, -EDEADLK }, + { -1, -EIO } +}; - if (hdr->minorversion == 0) - return; +/* + * If we cannot translate the error, the recovery routines should + * handle it. + * + * Note: remaining NFSv4 error codes have values > 10000, so should + * not conflict with native Linux error codes. + */ +static int nfs_cb_stat_to_errno(int status) +{ + int i; - RESERVE_SPACE(1 + NFS4_MAX_SESSIONID_LEN + 20); + for (i = 0; nfs_cb_errtbl[i].stat != -1; i++) { + if (nfs_cb_errtbl[i].stat == status) + return nfs_cb_errtbl[i].errno; + } - WRITE32(OP_CB_SEQUENCE); - WRITEMEM(ses->se_sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(ses->se_cb_seq_nr); - WRITE32(0); /* slotid, always 0 */ - WRITE32(0); /* highest slotid always 0 */ - WRITE32(0); /* cachethis always 0 */ - WRITE32(0); /* FIXME: support referring_call_lists */ - hdr->nops++; + dprintk("NFSD: Unrecognized NFS CB status value: %u\n", status); + return -status; } -static int -nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p) +static int decode_cb_op_status(struct xdr_stream *xdr, enum nfs_opnum4 expected, + enum nfsstat4 *status) { - struct xdr_stream xdrs, *xdr = &xdrs; + __be32 *p; + u32 op; - xdr_init_encode(&xdrs, &req->rq_snd_buf, p); - RESERVE_SPACE(0); + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + op = be32_to_cpup(p++); + if (unlikely(op != expected)) + goto out_unexpected; + *status = be32_to_cpup(p); return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +out_unexpected: + dprintk("NFSD: Callback server returned operation %d but " + "we issued a request for %d\n", op, expected); + return -EIO; } -static int -nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, - struct nfsd4_callback *cb) +/* + * CB_COMPOUND4args + * + * struct CB_COMPOUND4args { + * utf8str_cs tag; + * uint32_t minorversion; + * uint32_t callback_ident; + * nfs_cb_argop4 argarray<>; + * }; +*/ +static void encode_cb_compound4args(struct xdr_stream *xdr, + struct nfs4_cb_compound_hdr *hdr) { - struct xdr_stream xdr; - struct nfs4_delegation *args = cb->cb_op; - struct nfs4_cb_compound_hdr hdr = { - .ident = cb->cb_clp->cl_cb_ident, - .minorversion = cb->cb_minorversion, - }; + __be32 * p; - xdr_init_encode(&xdr, &req->rq_snd_buf, p); - encode_cb_compound_hdr(&xdr, &hdr); - encode_cb_sequence(&xdr, cb, &hdr); - encode_cb_recall(&xdr, args, &hdr); - encode_cb_nops(&hdr); + p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4); + p = xdr_encode_empty_array(p); /* empty tag */ + *p++ = cpu_to_be32(hdr->minorversion); + *p++ = cpu_to_be32(hdr->ident); + + hdr->nops_p = p; + *p = cpu_to_be32(hdr->nops); /* argarray element count */ +} + +/* + * Update argarray element count + */ +static void encode_cb_nops(struct nfs4_cb_compound_hdr *hdr) +{ + BUG_ON(hdr->nops > NFS4_MAX_BACK_CHANNEL_OPS); + *hdr->nops_p = cpu_to_be32(hdr->nops); +} + +/* + * CB_COMPOUND4res + * + * struct CB_COMPOUND4res { + * nfsstat4 status; + * utf8str_cs tag; + * nfs_cb_resop4 resarray<>; + * }; + */ +static int decode_cb_compound4res(struct xdr_stream *xdr, + struct nfs4_cb_compound_hdr *hdr) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + hdr->status = be32_to_cpup(p++); + /* Ignore the tag */ + length = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, length + 4); + if (unlikely(p == NULL)) + goto out_overflow; + hdr->nops = be32_to_cpup(p); return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } +/* + * CB_RECALL4args + * + * struct CB_RECALL4args { + * stateid4 stateid; + * bool truncate; + * nfs_fh4 fh; + * }; + */ +static void encode_cb_recall4args(struct xdr_stream *xdr, + const struct nfs4_delegation *dp, + struct nfs4_cb_compound_hdr *hdr) +{ + __be32 *p; + + encode_nfs_cb_opnum4(xdr, OP_CB_RECALL); + encode_stateid4(xdr, &dp->dl_stateid); + + p = xdr_reserve_space(xdr, 4); + *p++ = xdr_zero; /* truncate */ -static int -decode_cb_compound_hdr(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr){ - __be32 *p; - u32 taglen; + encode_nfs_fh4(xdr, &dp->dl_fh); - READ_BUF(8); - READ32(hdr->status); - /* We've got no use for the tag; ignore it: */ - READ32(taglen); - READ_BUF(taglen + 4); - p += XDR_QUADLEN(taglen); - READ32(hdr->nops); - return 0; + hdr->nops++; } -static int -decode_cb_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) +/* + * CB_SEQUENCE4args + * + * struct CB_SEQUENCE4args { + * sessionid4 csa_sessionid; + * sequenceid4 csa_sequenceid; + * slotid4 csa_slotid; + * slotid4 csa_highest_slotid; + * bool csa_cachethis; + * referring_call_list4 csa_referring_call_lists<>; + * }; + */ +static void encode_cb_sequence4args(struct xdr_stream *xdr, + const struct nfsd4_callback *cb, + struct nfs4_cb_compound_hdr *hdr) { + struct nfsd4_session *session = cb->cb_clp->cl_cb_session; __be32 *p; - u32 op; - int32_t nfserr; - - READ_BUF(8); - READ32(op); - if (op != expected) { - dprintk("NFSD: decode_cb_op_hdr: Callback server returned " - " operation %d but we issued a request for %d\n", - op, expected); - return -EIO; - } - READ32(nfserr); - if (nfserr != NFS_OK) - return -nfs_cb_stat_to_errno(nfserr); - return 0; + + if (hdr->minorversion == 0) + return; + + encode_nfs_cb_opnum4(xdr, OP_CB_SEQUENCE); + encode_sessionid4(xdr, session); + + p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4 + 4); + *p++ = cpu_to_be32(session->se_cb_seq_nr); /* csa_sequenceid */ + *p++ = xdr_zero; /* csa_slotid */ + *p++ = xdr_zero; /* csa_highest_slotid */ + *p++ = xdr_zero; /* csa_cachethis */ + xdr_encode_empty_array(p); /* csa_referring_call_lists */ + + hdr->nops++; } /* + * CB_SEQUENCE4resok + * + * struct CB_SEQUENCE4resok { + * sessionid4 csr_sessionid; + * sequenceid4 csr_sequenceid; + * slotid4 csr_slotid; + * slotid4 csr_highest_slotid; + * slotid4 csr_target_highest_slotid; + * }; + * + * union CB_SEQUENCE4res switch (nfsstat4 csr_status) { + * case NFS4_OK: + * CB_SEQUENCE4resok csr_resok4; + * default: + * void; + * }; + * * Our current back channel implmentation supports a single backchannel * with a single slot. */ -static int -decode_cb_sequence(struct xdr_stream *xdr, struct nfsd4_callback *cb, - struct rpc_rqst *rqstp) +static int decode_cb_sequence4resok(struct xdr_stream *xdr, + struct nfsd4_callback *cb) { - struct nfsd4_session *ses = cb->cb_clp->cl_cb_session; + struct nfsd4_session *session = cb->cb_clp->cl_cb_session; struct nfs4_sessionid id; int status; - u32 dummy; __be32 *p; + u32 dummy; - if (cb->cb_minorversion == 0) - return 0; - - status = decode_cb_op_hdr(xdr, OP_CB_SEQUENCE); - if (status) - return status; + status = -ESERVERFAULT; /* * If the server returns different values for sessionID, slotID or * sequence number, the server is looney tunes. */ - status = -ESERVERFAULT; - - READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); + p = xdr_inline_decode(xdr, NFS4_MAX_SESSIONID_LEN + 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; memcpy(id.data, p, NFS4_MAX_SESSIONID_LEN); - p += XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN); - if (memcmp(id.data, ses->se_sessionid.data, NFS4_MAX_SESSIONID_LEN)) { - dprintk("%s Invalid session id\n", __func__); + if (memcmp(id.data, session->se_sessionid.data, + NFS4_MAX_SESSIONID_LEN) != 0) { + dprintk("NFS: %s Invalid session id\n", __func__); goto out; } - READ32(dummy); - if (dummy != ses->se_cb_seq_nr) { - dprintk("%s Invalid sequence number\n", __func__); + p += XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN); + + dummy = be32_to_cpup(p++); + if (dummy != session->se_cb_seq_nr) { + dprintk("NFS: %s Invalid sequence number\n", __func__); goto out; } - READ32(dummy); /* slotid must be 0 */ + + dummy = be32_to_cpup(p++); if (dummy != 0) { - dprintk("%s Invalid slotid\n", __func__); + dprintk("NFS: %s Invalid slotid\n", __func__); goto out; } - /* FIXME: process highest slotid and target highest slotid */ + + /* + * FIXME: process highest slotid and target highest slotid + */ status = 0; out: return status; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; } +static int decode_cb_sequence4res(struct xdr_stream *xdr, + struct nfsd4_callback *cb) +{ + enum nfsstat4 nfserr; + int status; + + if (cb->cb_minorversion == 0) + return 0; + + status = decode_cb_op_status(xdr, OP_CB_SEQUENCE, &nfserr); + if (unlikely(status)) + goto out; + if (unlikely(nfserr != NFS4_OK)) + goto out_default; + status = decode_cb_sequence4resok(xdr, cb); +out: + return status; +out_default: + return nfs_cb_stat_to_errno(status); +} -static int -nfs4_xdr_dec_cb_null(struct rpc_rqst *req, __be32 *p) +/* + * NFSv4.0 and NFSv4.1 XDR encode functions + * + * NFSv4.0 callback argument types are defined in section 15 of RFC + * 3530: "Network File System (NFS) version 4 Protocol" and section 20 + * of RFC 5661: "Network File System (NFS) Version 4 Minor Version 1 + * Protocol". + */ + +/* + * NB: Without this zero space reservation, callbacks over krb5p fail + */ +static void nfs4_xdr_enc_cb_null(struct rpc_rqst *req, struct xdr_stream *xdr, + void *__unused) +{ + xdr_reserve_space(xdr, 0); +} + +/* + * 20.2. Operation 4: CB_RECALL - Recall a Delegation + */ +static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr, + const struct nfsd4_callback *cb) +{ + const struct nfs4_delegation *args = cb->cb_op; + struct nfs4_cb_compound_hdr hdr = { + .ident = cb->cb_clp->cl_cb_ident, + .minorversion = cb->cb_minorversion, + }; + + encode_cb_compound4args(xdr, &hdr); + encode_cb_sequence4args(xdr, cb, &hdr); + encode_cb_recall4args(xdr, args, &hdr); + encode_cb_nops(&hdr); +} + + +/* + * NFSv4.0 and NFSv4.1 XDR decode functions + * + * NFSv4.0 callback result types are defined in section 15 of RFC + * 3530: "Network File System (NFS) version 4 Protocol" and section 20 + * of RFC 5661: "Network File System (NFS) Version 4 Minor Version 1 + * Protocol". + */ + +static int nfs4_xdr_dec_cb_null(struct rpc_rqst *req, struct xdr_stream *xdr, + void *__unused) { return 0; } -static int -nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, __be32 *p, - struct nfsd4_callback *cb) +/* + * 20.2. Operation 4: CB_RECALL - Recall a Delegation + */ +static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfsd4_callback *cb) { - struct xdr_stream xdr; struct nfs4_cb_compound_hdr hdr; + enum nfsstat4 nfserr; int status; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); - status = decode_cb_compound_hdr(&xdr, &hdr); - if (status) + status = decode_cb_compound4res(xdr, &hdr); + if (unlikely(status)) goto out; - if (cb) { - status = decode_cb_sequence(&xdr, cb, rqstp); - if (status) + + if (cb != NULL) { + status = decode_cb_sequence4res(xdr, cb); + if (unlikely(status)) goto out; } - status = decode_cb_op_hdr(&xdr, OP_CB_RECALL); + + status = decode_cb_op_status(xdr, OP_CB_RECALL, &nfserr); + if (unlikely(status)) + goto out; + if (unlikely(nfserr != NFS4_OK)) + goto out_default; out: return status; +out_default: + return nfs_cb_stat_to_errno(status); } /* * RPC procedure tables */ -#define PROC(proc, call, argtype, restype) \ -[NFSPROC4_CLNT_##proc] = { \ - .p_proc = NFSPROC4_CB_##call, \ - .p_encode = (kxdrproc_t) nfs4_xdr_##argtype, \ - .p_decode = (kxdrproc_t) nfs4_xdr_##restype, \ - .p_arglen = NFS4_##argtype##_sz, \ - .p_replen = NFS4_##restype##_sz, \ - .p_statidx = NFSPROC4_CB_##call, \ - .p_name = #proc, \ -} - -static struct rpc_procinfo nfs4_cb_procedures[] = { - PROC(CB_NULL, NULL, enc_cb_null, dec_cb_null), - PROC(CB_RECALL, COMPOUND, enc_cb_recall, dec_cb_recall), +#define PROC(proc, call, argtype, restype) \ +[NFSPROC4_CLNT_##proc] = { \ + .p_proc = NFSPROC4_CB_##call, \ + .p_encode = (kxdreproc_t)nfs4_xdr_enc_##argtype, \ + .p_decode = (kxdrdproc_t)nfs4_xdr_dec_##restype, \ + .p_arglen = NFS4_enc_##argtype##_sz, \ + .p_replen = NFS4_dec_##restype##_sz, \ + .p_statidx = NFSPROC4_CB_##call, \ + .p_name = #proc, \ +} + +static struct rpc_procinfo nfs4_cb_procedures[] = { + PROC(CB_NULL, NULL, cb_null, cb_null), + PROC(CB_RECALL, COMPOUND, cb_recall, cb_recall), }; -static struct rpc_version nfs_cb_version4 = { +static struct rpc_version nfs_cb_version4 = { /* * Note on the callback rpc program version number: despite language in rfc * 5661 section 18.36.3 requiring servers to use 4 in this field, the @@ -440,29 +598,29 @@ static struct rpc_version nfs_cb_version4 = { * in practice that appears to be what implementations use. The section * 18.36.3 language is expected to be fixed in an erratum. */ - .number = 1, - .nrprocs = ARRAY_SIZE(nfs4_cb_procedures), - .procs = nfs4_cb_procedures + .number = 1, + .nrprocs = ARRAY_SIZE(nfs4_cb_procedures), + .procs = nfs4_cb_procedures }; -static struct rpc_version * nfs_cb_version[] = { +static struct rpc_version *nfs_cb_version[] = { &nfs_cb_version4, }; static struct rpc_program cb_program; static struct rpc_stat cb_stats = { - .program = &cb_program + .program = &cb_program }; #define NFS4_CALLBACK 0x40000000 static struct rpc_program cb_program = { - .name = "nfs4_cb", - .number = NFS4_CALLBACK, - .nrvers = ARRAY_SIZE(nfs_cb_version), - .version = nfs_cb_version, - .stats = &cb_stats, - .pipe_dir_name = "/nfsd4_cb", + .name = "nfs4_cb", + .number = NFS4_CALLBACK, + .nrvers = ARRAY_SIZE(nfs_cb_version), + .version = nfs_cb_version, + .stats = &cb_stats, + .pipe_dir_name = "/nfsd4_cb", }; static int max_cb_time(void) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 56347e0..fbd18c3 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -673,16 +673,17 @@ static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) spin_unlock(&clp->cl_lock); } -static void nfsd4_register_conn(struct nfsd4_conn *conn) +static int nfsd4_register_conn(struct nfsd4_conn *conn) { conn->cn_xpt_user.callback = nfsd4_conn_lost; - register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); + return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); } static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) { struct nfsd4_conn *conn; u32 flags = NFS4_CDFC4_FORE; + int ret; if (ses->se_flags & SESSION4_BACK_CHAN) flags |= NFS4_CDFC4_BACK; @@ -690,7 +691,10 @@ static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) if (!conn) return nfserr_jukebox; nfsd4_hash_conn(conn, ses); - nfsd4_register_conn(conn); + ret = nfsd4_register_conn(conn); + if (ret) + /* oops; xprt is already down: */ + nfsd4_conn_lost(&conn->cn_xpt_user); return nfs_ok; } @@ -1644,6 +1648,7 @@ static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_sessi { struct nfs4_client *clp = ses->se_client; struct nfsd4_conn *c; + int ret; spin_lock(&clp->cl_lock); c = __nfsd4_find_conn(new->cn_xprt, ses); @@ -1654,7 +1659,10 @@ static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_sessi } __nfsd4_hash_conn(new, ses); spin_unlock(&clp->cl_lock); - nfsd4_register_conn(new); + ret = nfsd4_register_conn(new); + if (ret) + /* oops; xprt is already down: */ + nfsd4_conn_lost(&new->cn_xpt_user); return; } @@ -2254,7 +2262,7 @@ nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) * Spawn a thread to perform a recall on the delegation represented * by the lease (file_lock) * - * Called from break_lease() with lock_kernel() held. + * Called from break_lease() with lock_flocks() held. * Note: we assume break_lease will only call this *once* for any given * lease. */ @@ -2278,7 +2286,7 @@ void nfsd_break_deleg_cb(struct file_lock *fl) list_add_tail(&dp->dl_recall_lru, &del_recall_lru); spin_unlock(&recall_lock); - /* only place dl_time is set. protected by lock_kernel*/ + /* only place dl_time is set. protected by lock_flocks*/ dp->dl_time = get_seconds(); /* @@ -2295,7 +2303,7 @@ void nfsd_break_deleg_cb(struct file_lock *fl) /* * The file_lock is being reapd. * - * Called by locks_free_lock() with lock_kernel() held. + * Called by locks_free_lock() with lock_flocks() held. */ static void nfsd_release_deleg_cb(struct file_lock *fl) @@ -2310,23 +2318,7 @@ void nfsd_release_deleg_cb(struct file_lock *fl) } /* - * Set the delegation file_lock back pointer. - * - * Called from setlease() with lock_kernel() held. - */ -static -void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) -{ - struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; - - dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); - if (!dp) - return; - dp->dl_flock = new; -} - -/* - * Called from setlease() with lock_kernel() held + * Called from setlease() with lock_flocks() held */ static int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) @@ -2355,7 +2347,6 @@ int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) static const struct lock_manager_operations nfsd_lease_mng_ops = { .fl_break = nfsd_break_deleg_cb, .fl_release_private = nfsd_release_deleg_cb, - .fl_copy_lock = nfsd_copy_lock_deleg_cb, .fl_mylease = nfsd_same_client_deleg_cb, .fl_change = nfsd_change_deleg_cb, }; @@ -2661,12 +2652,15 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta fl->fl_file = find_readable_file(stp->st_file); BUG_ON(!fl->fl_file); fl->fl_pid = current->tgid; + dp->dl_flock = fl; /* vfs_setlease checks to see if delegation should be handed out. * the lock_manager callbacks fl_mylease and fl_change are used */ if ((status = vfs_setlease(fl->fl_file, fl->fl_type, &fl))) { dprintk("NFSD: setlease failed [%d], no delegation\n", status); + dp->dl_flock = NULL; + locks_free_lock(fl); unhash_delegation(dp); flag = NFS4_OPEN_DELEGATE_NONE; goto out; @@ -4342,7 +4336,7 @@ __nfs4_state_shutdown(void) void nfs4_state_shutdown(void) { - cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); + cancel_delayed_work_sync(&laundromat_work); destroy_workqueue(laundry_wq); locks_end_grace(&nfsd4_manager); nfs4_lock_state(); diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index d6dc3f6..4514ebb 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1405,16 +1405,16 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent) return simple_fill_super(sb, 0x6e667364, nfsd_files); } -static int nfsd_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *nfsd_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); + return mount_single(fs_type, flags, data, nfsd_fill_super); } static struct file_system_type nfsd_fs_type = { .owner = THIS_MODULE, .name = "nfsd", - .get_sb = nfsd_get_sb, + .mount = nfsd_mount, .kill_sb = kill_litter_super, }; diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 184938f..3a35902 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1756,8 +1756,7 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen, goto out_dput_new; if (svc_msnfs(ffhp) && - ((atomic_read(&odentry->d_count) > 1) - || (atomic_read(&ndentry->d_count) > 1))) { + ((odentry->d_count > 1) || (ndentry->d_count > 1))) { host_err = -EPERM; goto out_dput_new; } @@ -1843,7 +1842,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, if (type != S_IFDIR) { /* It's UNLINK */ #ifdef MSNFS if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) && - (atomic_read(&rdentry->d_count) > 1)) { + (rdentry->d_count > 1)) { host_err = -EPERM; } else #endif diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 4d476ff..60fce3d 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -484,18 +484,17 @@ static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp) static inline void set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp) { - BUG_ON(!fhp->fh_pre_saved || !fhp->fh_post_saved); - cinfo->atomic = 1; + BUG_ON(!fhp->fh_pre_saved); + cinfo->atomic = fhp->fh_post_saved; cinfo->change_supported = IS_I_VERSION(fhp->fh_dentry->d_inode); - if (cinfo->change_supported) { - cinfo->before_change = fhp->fh_pre_change; - cinfo->after_change = fhp->fh_post_change; - } else { - cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec; - cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec; - cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec; - cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec; - } + + cinfo->before_change = fhp->fh_pre_change; + cinfo->after_change = fhp->fh_post_change; + cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec; + cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec; + cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec; + cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec; + } int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *, void *); diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c index 8b782b0..3ee67c6 100644 --- a/fs/nilfs2/bmap.c +++ b/fs/nilfs2/bmap.c @@ -35,7 +35,20 @@ struct inode *nilfs_bmap_get_dat(const struct nilfs_bmap *bmap) { - return nilfs_dat_inode(NILFS_I_NILFS(bmap->b_inode)); + return NILFS_I_NILFS(bmap->b_inode)->ns_dat; +} + +static int nilfs_bmap_convert_error(struct nilfs_bmap *bmap, + const char *fname, int err) +{ + struct inode *inode = bmap->b_inode; + + if (err == -EINVAL) { + nilfs_error(inode->i_sb, fname, + "broken bmap (inode number=%lu)\n", inode->i_ino); + err = -EIO; + } + return err; } /** @@ -66,8 +79,10 @@ int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level, down_read(&bmap->b_sem); ret = bmap->b_ops->bop_lookup(bmap, key, level, ptrp); - if (ret < 0) + if (ret < 0) { + ret = nilfs_bmap_convert_error(bmap, __func__, ret); goto out; + } if (NILFS_BMAP_USE_VBN(bmap)) { ret = nilfs_dat_translate(nilfs_bmap_get_dat(bmap), *ptrp, &blocknr); @@ -88,7 +103,8 @@ int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp, down_read(&bmap->b_sem); ret = bmap->b_ops->bop_lookup_contig(bmap, key, ptrp, maxblocks); up_read(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } static int nilfs_bmap_do_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr) @@ -144,7 +160,8 @@ int nilfs_bmap_insert(struct nilfs_bmap *bmap, down_write(&bmap->b_sem); ret = nilfs_bmap_do_insert(bmap, key, rec); up_write(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } static int nilfs_bmap_do_delete(struct nilfs_bmap *bmap, __u64 key) @@ -180,9 +197,12 @@ int nilfs_bmap_last_key(struct nilfs_bmap *bmap, unsigned long *key) down_read(&bmap->b_sem); ret = bmap->b_ops->bop_last_key(bmap, &lastkey); - if (!ret) - *key = lastkey; up_read(&bmap->b_sem); + + if (ret < 0) + ret = nilfs_bmap_convert_error(bmap, __func__, ret); + else + *key = lastkey; return ret; } @@ -210,7 +230,8 @@ int nilfs_bmap_delete(struct nilfs_bmap *bmap, unsigned long key) down_write(&bmap->b_sem); ret = nilfs_bmap_do_delete(bmap, key); up_write(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } static int nilfs_bmap_do_truncate(struct nilfs_bmap *bmap, unsigned long key) @@ -261,7 +282,8 @@ int nilfs_bmap_truncate(struct nilfs_bmap *bmap, unsigned long key) down_write(&bmap->b_sem); ret = nilfs_bmap_do_truncate(bmap, key); up_write(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } /** @@ -300,7 +322,8 @@ int nilfs_bmap_propagate(struct nilfs_bmap *bmap, struct buffer_head *bh) down_write(&bmap->b_sem); ret = bmap->b_ops->bop_propagate(bmap, bh); up_write(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } /** @@ -344,7 +367,8 @@ int nilfs_bmap_assign(struct nilfs_bmap *bmap, down_write(&bmap->b_sem); ret = bmap->b_ops->bop_assign(bmap, bh, blocknr, binfo); up_write(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } /** @@ -373,7 +397,8 @@ int nilfs_bmap_mark(struct nilfs_bmap *bmap, __u64 key, int level) down_write(&bmap->b_sem); ret = bmap->b_ops->bop_mark(bmap, key, level); up_write(&bmap->b_sem); - return ret; + + return nilfs_bmap_convert_error(bmap, __func__, ret); } /** diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c index 5115814c..388e9e8 100644 --- a/fs/nilfs2/btnode.c +++ b/fs/nilfs2/btnode.c @@ -104,8 +104,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr, if (pblocknr == 0) { pblocknr = blocknr; if (inode->i_ino != NILFS_DAT_INO) { - struct inode *dat = - nilfs_dat_inode(NILFS_I_NILFS(inode)); + struct inode *dat = NILFS_I_NILFS(inode)->ns_dat; /* blocknr is a virtual block number */ err = nilfs_dat_translate(dat, blocknr, &pblocknr); diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c index 49c844d..59e5fe7 100644 --- a/fs/nilfs2/dat.c +++ b/fs/nilfs2/dat.c @@ -335,7 +335,7 @@ int nilfs_dat_move(struct inode *dat, __u64 vblocknr, sector_t blocknr) * the device at this point. * * To prevent nilfs_dat_translate() from returning the - * uncommited block number, this makes a copy of the entry + * uncommitted block number, this makes a copy of the entry * buffer and redirects nilfs_dat_translate() to the copy. */ if (!buffer_nilfs_redirected(entry_bh)) { diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c index cb003c8..9d45773 100644 --- a/fs/nilfs2/dir.c +++ b/fs/nilfs2/dir.c @@ -91,7 +91,6 @@ static void nilfs_commit_chunk(struct page *page, unsigned from, unsigned to) { struct inode *dir = mapping->host; - struct nilfs_sb_info *sbi = NILFS_SB(dir->i_sb); loff_t pos = page_offset(page) + from; unsigned len = to - from; unsigned nr_dirty, copied; @@ -103,7 +102,7 @@ static void nilfs_commit_chunk(struct page *page, i_size_write(dir, pos + copied); if (IS_DIRSYNC(dir)) nilfs_set_transaction_flag(NILFS_TI_SYNC); - err = nilfs_set_file_dirty(sbi, dir, nr_dirty); + err = nilfs_set_file_dirty(dir, nr_dirty); WARN_ON(err); /* do not happen */ unlock_page(page); } diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c index c9a30d7..2f560c9 100644 --- a/fs/nilfs2/file.c +++ b/fs/nilfs2/file.c @@ -155,6 +155,7 @@ const struct inode_operations nilfs_file_inode_operations = { .truncate = nilfs_truncate, .setattr = nilfs_setattr, .permission = nilfs_permission, + .fiemap = nilfs_fiemap, }; /* end of file */ diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c index 33ad25d..caf9a6a 100644 --- a/fs/nilfs2/gcinode.c +++ b/fs/nilfs2/gcinode.c @@ -176,7 +176,6 @@ int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *bh) int nilfs_init_gcinode(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); - struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; inode->i_mode = S_IFREG; mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); @@ -186,14 +185,6 @@ int nilfs_init_gcinode(struct inode *inode) ii->i_flags = 0; nilfs_bmap_init_gc(ii->i_bmap); - /* - * Add the inode to GC inode list. Garbage Collection - * is serialized and no two processes manipulate the - * list simultaneously. - */ - igrab(inode); - list_add(&NILFS_I(inode)->i_dirty, &nilfs->ns_gc_inodes); - return 0; } diff --git a/fs/nilfs2/ifile.c b/fs/nilfs2/ifile.c index 9f8a2da..bfc73d3 100644 --- a/fs/nilfs2/ifile.c +++ b/fs/nilfs2/ifile.c @@ -149,14 +149,9 @@ int nilfs_ifile_get_inode_block(struct inode *ifile, ino_t ino, } err = nilfs_palloc_get_entry_block(ifile, ino, 0, out_bh); - if (unlikely(err)) { - if (err == -EINVAL) - nilfs_error(sb, __func__, "ifile is broken"); - else - nilfs_warning(sb, __func__, - "unable to read inode: %lu", - (unsigned long) ino); - } + if (unlikely(err)) + nilfs_warning(sb, __func__, "unable to read inode: %lu", + (unsigned long) ino); return err; } diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 71d4bc8..2fd440d 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -58,7 +58,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff, struct nilfs_inode_info *ii = NILFS_I(inode); __u64 blknum = 0; int err = 0, ret; - struct inode *dat = nilfs_dat_inode(NILFS_I_NILFS(inode)); + struct inode *dat = NILFS_I_NILFS(inode)->ns_dat; unsigned maxblocks = bh_result->b_size >> inode->i_blkbits; down_read(&NILFS_MDT(dat)->mi_sem); @@ -96,11 +96,6 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff, inode->i_ino, (unsigned long long)blkoff); err = 0; - } else if (err == -EINVAL) { - nilfs_error(inode->i_sb, __func__, - "broken bmap (inode=%lu)\n", - inode->i_ino); - err = -EIO; } nilfs_transaction_abort(inode->i_sb); goto out; @@ -109,6 +104,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff, nilfs_transaction_commit(inode->i_sb); /* never fails */ /* Error handling should be detailed */ set_buffer_new(bh_result); + set_buffer_delay(bh_result); map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed to proper value */ } else if (ret == -ENOENT) { @@ -185,10 +181,9 @@ static int nilfs_set_page_dirty(struct page *page) if (ret) { struct inode *inode = page->mapping->host; - struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits); - nilfs_set_file_dirty(sbi, inode, nr_dirty); + nilfs_set_file_dirty(inode, nr_dirty); } return ret; } @@ -229,7 +224,7 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping, start + copied); copied = generic_write_end(file, mapping, pos, len, copied, page, fsdata); - nilfs_set_file_dirty(NILFS_SB(inode->i_sb), inode, nr_dirty); + nilfs_set_file_dirty(inode, nr_dirty); err = nilfs_transaction_commit(inode->i_sb); return err ? : copied; } @@ -425,13 +420,12 @@ static int __nilfs_read_inode(struct super_block *sb, struct nilfs_root *root, unsigned long ino, struct inode *inode) { - struct nilfs_sb_info *sbi = NILFS_SB(sb); - struct inode *dat = nilfs_dat_inode(sbi->s_nilfs); + struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs; struct buffer_head *bh; struct nilfs_inode *raw_inode; int err; - down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh); if (unlikely(err)) goto bad_inode; @@ -461,7 +455,7 @@ static int __nilfs_read_inode(struct super_block *sb, } nilfs_ifile_unmap_inode(root->ifile, ino, bh); brelse(bh); - up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); nilfs_set_inode_flags(inode); return 0; @@ -470,7 +464,7 @@ static int __nilfs_read_inode(struct super_block *sb, brelse(bh); bad_inode: - up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); return err; } @@ -629,7 +623,7 @@ static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, if (!test_bit(NILFS_I_BMAP, &ii->i_state)) return; - repeat: +repeat: ret = nilfs_bmap_last_key(ii->i_bmap, &b); if (ret == -ENOENT) return; @@ -646,14 +640,10 @@ static void nilfs_truncate_bmap(struct nilfs_inode_info *ii, nilfs_bmap_truncate(ii->i_bmap, b) == 0)) goto repeat; - failed: - if (ret == -EINVAL) - nilfs_error(ii->vfs_inode.i_sb, __func__, - "bmap is broken (ino=%lu)", ii->vfs_inode.i_ino); - else - nilfs_warning(ii->vfs_inode.i_sb, __func__, - "failed to truncate bmap (ino=%lu, err=%d)", - ii->vfs_inode.i_ino, ret); +failed: + nilfs_warning(ii->vfs_inode.i_sb, __func__, + "failed to truncate bmap (ino=%lu, err=%d)", + ii->vfs_inode.i_ino, ret); } void nilfs_truncate(struct inode *inode) @@ -682,7 +672,7 @@ void nilfs_truncate(struct inode *inode) nilfs_set_transaction_flag(NILFS_TI_SYNC); nilfs_mark_inode_dirty(inode); - nilfs_set_file_dirty(NILFS_SB(sb), inode, 0); + nilfs_set_file_dirty(inode, 0); nilfs_transaction_commit(sb); /* May construct a logical segment and may fail in sync mode. But truncate has no return value. */ @@ -785,20 +775,24 @@ out_err: return err; } -int nilfs_permission(struct inode *inode, int mask) +int nilfs_permission(struct inode *inode, int mask, unsigned int flags) { - struct nilfs_root *root = NILFS_I(inode)->i_root; + struct nilfs_root *root; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + + root = NILFS_I(inode)->i_root; if ((mask & MAY_WRITE) && root && root->cno != NILFS_CPTREE_CURRENT_CNO) return -EROFS; /* snapshot is not writable */ - return generic_permission(inode, mask, NULL); + return generic_permission(inode, mask, flags, NULL); } -int nilfs_load_inode_block(struct nilfs_sb_info *sbi, struct inode *inode, - struct buffer_head **pbh) +int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh) { + struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); struct nilfs_inode_info *ii = NILFS_I(inode); int err; @@ -839,9 +833,9 @@ int nilfs_inode_dirty(struct inode *inode) return ret; } -int nilfs_set_file_dirty(struct nilfs_sb_info *sbi, struct inode *inode, - unsigned nr_dirty) +int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty) { + struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); struct nilfs_inode_info *ii = NILFS_I(inode); atomic_add(nr_dirty, &sbi->s_nilfs->ns_ndirtyblks); @@ -874,11 +868,10 @@ int nilfs_set_file_dirty(struct nilfs_sb_info *sbi, struct inode *inode, int nilfs_mark_inode_dirty(struct inode *inode) { - struct nilfs_sb_info *sbi = NILFS_SB(inode->i_sb); struct buffer_head *ibh; int err; - err = nilfs_load_inode_block(sbi, inode, &ibh); + err = nilfs_load_inode_block(inode, &ibh); if (unlikely(err)) { nilfs_warning(inode->i_sb, __func__, "failed to reget inode block.\n"); @@ -920,3 +913,134 @@ void nilfs_dirty_inode(struct inode *inode) nilfs_mark_inode_dirty(inode); nilfs_transaction_commit(inode->i_sb); /* never fails */ } + +int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + __u64 start, __u64 len) +{ + struct the_nilfs *nilfs = NILFS_I_NILFS(inode); + __u64 logical = 0, phys = 0, size = 0; + __u32 flags = 0; + loff_t isize; + sector_t blkoff, end_blkoff; + sector_t delalloc_blkoff; + unsigned long delalloc_blklen; + unsigned int blkbits = inode->i_blkbits; + int ret, n; + + ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); + if (ret) + return ret; + + mutex_lock(&inode->i_mutex); + + isize = i_size_read(inode); + + blkoff = start >> blkbits; + end_blkoff = (start + len - 1) >> blkbits; + + delalloc_blklen = nilfs_find_uncommitted_extent(inode, blkoff, + &delalloc_blkoff); + + do { + __u64 blkphy; + unsigned int maxblocks; + + if (delalloc_blklen && blkoff == delalloc_blkoff) { + if (size) { + /* End of the current extent */ + ret = fiemap_fill_next_extent( + fieinfo, logical, phys, size, flags); + if (ret) + break; + } + if (blkoff > end_blkoff) + break; + + flags = FIEMAP_EXTENT_MERGED | FIEMAP_EXTENT_DELALLOC; + logical = blkoff << blkbits; + phys = 0; + size = delalloc_blklen << blkbits; + + blkoff = delalloc_blkoff + delalloc_blklen; + delalloc_blklen = nilfs_find_uncommitted_extent( + inode, blkoff, &delalloc_blkoff); + continue; + } + + /* + * Limit the number of blocks that we look up so as + * not to get into the next delayed allocation extent. + */ + maxblocks = INT_MAX; + if (delalloc_blklen) + maxblocks = min_t(sector_t, delalloc_blkoff - blkoff, + maxblocks); + blkphy = 0; + + down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); + n = nilfs_bmap_lookup_contig( + NILFS_I(inode)->i_bmap, blkoff, &blkphy, maxblocks); + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); + + if (n < 0) { + int past_eof; + + if (unlikely(n != -ENOENT)) + break; /* error */ + + /* HOLE */ + blkoff++; + past_eof = ((blkoff << blkbits) >= isize); + + if (size) { + /* End of the current extent */ + + if (past_eof) + flags |= FIEMAP_EXTENT_LAST; + + ret = fiemap_fill_next_extent( + fieinfo, logical, phys, size, flags); + if (ret) + break; + size = 0; + } + if (blkoff > end_blkoff || past_eof) + break; + } else { + if (size) { + if (phys && blkphy << blkbits == phys + size) { + /* The current extent goes on */ + size += n << blkbits; + } else { + /* Terminate the current extent */ + ret = fiemap_fill_next_extent( + fieinfo, logical, phys, size, + flags); + if (ret || blkoff > end_blkoff) + break; + + /* Start another extent */ + flags = FIEMAP_EXTENT_MERGED; + logical = blkoff << blkbits; + phys = blkphy << blkbits; + size = n << blkbits; + } + } else { + /* Start a new extent */ + flags = FIEMAP_EXTENT_MERGED; + logical = blkoff << blkbits; + phys = blkphy << blkbits; + size = n << blkbits; + } + blkoff += n; + } + cond_resched(); + } while (true); + + /* If ret is 1 then we just hit the end of the extent array */ + if (ret == 1) + ret = 0; + + mutex_unlock(&inode->i_mutex); + return ret; +} diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c index 3e90f86..4967389 100644 --- a/fs/nilfs2/ioctl.c +++ b/fs/nilfs2/ioctl.c @@ -233,7 +233,7 @@ nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, int ret; down_read(&nilfs->ns_segctor_sem); - ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, size, nmembs); + ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); up_read(&nilfs->ns_segctor_sem); return ret; } @@ -242,8 +242,7 @@ static ssize_t nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, void *buf, size_t size, size_t nmembs) { - struct inode *dat = nilfs_dat_inode(nilfs); - struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; + struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; struct nilfs_bdesc *bdescs = buf; int ret, i; @@ -337,6 +336,7 @@ static int nilfs_ioctl_move_blocks(struct super_block *sb, struct nilfs_argv *argv, void *buf) { size_t nmembs = argv->v_nmembs; + struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs; struct inode *inode; struct nilfs_vdesc *vdesc; struct buffer_head *bh, *n; @@ -349,10 +349,21 @@ static int nilfs_ioctl_move_blocks(struct super_block *sb, ino = vdesc->vd_ino; cno = vdesc->vd_cno; inode = nilfs_iget_for_gc(sb, ino, cno); - if (unlikely(inode == NULL)) { - ret = -ENOMEM; + if (IS_ERR(inode)) { + ret = PTR_ERR(inode); goto failed; } + if (list_empty(&NILFS_I(inode)->i_dirty)) { + /* + * Add the inode to GC inode list. Garbage Collection + * is serialized and no two processes manipulate the + * list simultaneously. + */ + igrab(inode); + list_add(&NILFS_I(inode)->i_dirty, + &nilfs->ns_gc_inodes); + } + do { ret = nilfs_ioctl_move_inode_block(inode, vdesc, &buffers); @@ -409,7 +420,7 @@ static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, size_t nmembs = argv->v_nmembs; int ret; - ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs); + ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); return (ret < 0) ? ret : nmembs; } @@ -418,8 +429,7 @@ static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, struct nilfs_argv *argv, void *buf) { size_t nmembs = argv->v_nmembs; - struct inode *dat = nilfs_dat_inode(nilfs); - struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; + struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; struct nilfs_bdesc *bdescs = buf; int ret, i; @@ -438,7 +448,7 @@ static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, /* skip dead block */ continue; if (bdescs[i].bd_level == 0) { - ret = nilfs_mdt_mark_block_dirty(dat, + ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat, bdescs[i].bd_offset); if (ret < 0) { WARN_ON(ret == -ENOENT); diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c index 39a5b84..6a0e2a1 100644 --- a/fs/nilfs2/mdt.c +++ b/fs/nilfs2/mdt.c @@ -237,8 +237,6 @@ static int nilfs_mdt_read_block(struct inode *inode, unsigned long block, * * %-ENOENT - the specified block does not exist (hole block) * - * %-EINVAL - bmap is broken. (the caller should call nilfs_error()) - * * %-EROFS - Read only filesystem (for create mode) */ int nilfs_mdt_get_block(struct inode *inode, unsigned long blkoff, int create, @@ -273,8 +271,6 @@ int nilfs_mdt_get_block(struct inode *inode, unsigned long blkoff, int create, * %-ENOMEM - Insufficient memory available. * * %-EIO - I/O error - * - * %-EINVAL - bmap is broken. (the caller should call nilfs_error()) */ int nilfs_mdt_delete_block(struct inode *inode, unsigned long block) { @@ -350,8 +346,6 @@ int nilfs_mdt_forget_block(struct inode *inode, unsigned long block) * %-EIO - I/O error * * %-ENOENT - the specified block does not exist (hole block) - * - * %-EINVAL - bmap is broken. (the caller should call nilfs_error()) */ int nilfs_mdt_mark_block_dirty(struct inode *inode, unsigned long block) { @@ -499,31 +493,29 @@ int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh) struct buffer_head *bh_frozen; struct page *page; int blkbits = inode->i_blkbits; - int ret = -ENOMEM; page = grab_cache_page(&shadow->frozen_data, bh->b_page->index); if (!page) - return ret; + return -ENOMEM; if (!page_has_buffers(page)) create_empty_buffers(page, 1 << blkbits, 0); bh_frozen = nilfs_page_get_nth_block(page, bh_offset(bh) >> blkbits); - if (bh_frozen) { - if (!buffer_uptodate(bh_frozen)) - nilfs_copy_buffer(bh_frozen, bh); - if (list_empty(&bh_frozen->b_assoc_buffers)) { - list_add_tail(&bh_frozen->b_assoc_buffers, - &shadow->frozen_buffers); - set_buffer_nilfs_redirected(bh); - } else { - brelse(bh_frozen); /* already frozen */ - } - ret = 0; + + if (!buffer_uptodate(bh_frozen)) + nilfs_copy_buffer(bh_frozen, bh); + if (list_empty(&bh_frozen->b_assoc_buffers)) { + list_add_tail(&bh_frozen->b_assoc_buffers, + &shadow->frozen_buffers); + set_buffer_nilfs_redirected(bh); + } else { + brelse(bh_frozen); /* already frozen */ } + unlock_page(page); page_cache_release(page); - return ret; + return 0; } struct buffer_head * diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c index 6e9557e..9803427 100644 --- a/fs/nilfs2/namei.c +++ b/fs/nilfs2/namei.c @@ -577,6 +577,7 @@ const struct inode_operations nilfs_dir_inode_operations = { .rename = nilfs_rename, .setattr = nilfs_setattr, .permission = nilfs_permission, + .fiemap = nilfs_fiemap, }; const struct inode_operations nilfs_special_inode_operations = { diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h index f7560da..777e8fd 100644 --- a/fs/nilfs2/nilfs.h +++ b/fs/nilfs2/nilfs.h @@ -190,11 +190,6 @@ static inline int nilfs_doing_construction(void) return nilfs_test_transaction_flag(NILFS_TI_WRITER); } -static inline struct inode *nilfs_dat_inode(const struct the_nilfs *nilfs) -{ - return nilfs->ns_dat; -} - /* * function prototype */ @@ -256,14 +251,14 @@ extern void nilfs_update_inode(struct inode *, struct buffer_head *); extern void nilfs_truncate(struct inode *); extern void nilfs_evict_inode(struct inode *); extern int nilfs_setattr(struct dentry *, struct iattr *); -int nilfs_permission(struct inode *inode, int mask); -extern int nilfs_load_inode_block(struct nilfs_sb_info *, struct inode *, - struct buffer_head **); +int nilfs_permission(struct inode *inode, int mask, unsigned int flags); +int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh); extern int nilfs_inode_dirty(struct inode *); -extern int nilfs_set_file_dirty(struct nilfs_sb_info *, struct inode *, - unsigned); +int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty); extern int nilfs_mark_inode_dirty(struct inode *); extern void nilfs_dirty_inode(struct inode *); +int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, + __u64 start, __u64 len); /* super.c */ extern struct inode *nilfs_alloc_inode(struct super_block *); diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index a6c3c2e8..0c43241 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -491,7 +491,7 @@ unsigned nilfs_page_count_clean_buffers(struct page *page, } return nc; } - + void nilfs_mapping_init_once(struct address_space *mapping) { memset(mapping, 0, sizeof(*mapping)); @@ -546,3 +546,87 @@ int __nilfs_clear_page_dirty(struct page *page) } return TestClearPageDirty(page); } + +/** + * nilfs_find_uncommitted_extent - find extent of uncommitted data + * @inode: inode + * @start_blk: start block offset (in) + * @blkoff: start offset of the found extent (out) + * + * This function searches an extent of buffers marked "delayed" which + * starts from a block offset equal to or larger than @start_blk. If + * such an extent was found, this will store the start offset in + * @blkoff and return its length in blocks. Otherwise, zero is + * returned. + */ +unsigned long nilfs_find_uncommitted_extent(struct inode *inode, + sector_t start_blk, + sector_t *blkoff) +{ + unsigned int i; + pgoff_t index; + unsigned int nblocks_in_page; + unsigned long length = 0; + sector_t b; + struct pagevec pvec; + struct page *page; + + if (inode->i_mapping->nrpages == 0) + return 0; + + index = start_blk >> (PAGE_CACHE_SHIFT - inode->i_blkbits); + nblocks_in_page = 1U << (PAGE_CACHE_SHIFT - inode->i_blkbits); + + pagevec_init(&pvec, 0); + +repeat: + pvec.nr = find_get_pages_contig(inode->i_mapping, index, PAGEVEC_SIZE, + pvec.pages); + if (pvec.nr == 0) + return length; + + if (length > 0 && pvec.pages[0]->index > index) + goto out; + + b = pvec.pages[0]->index << (PAGE_CACHE_SHIFT - inode->i_blkbits); + i = 0; + do { + page = pvec.pages[i]; + + lock_page(page); + if (page_has_buffers(page)) { + struct buffer_head *bh, *head; + + bh = head = page_buffers(page); + do { + if (b < start_blk) + continue; + if (buffer_delay(bh)) { + if (length == 0) + *blkoff = b; + length++; + } else if (length > 0) { + goto out_locked; + } + } while (++b, bh = bh->b_this_page, bh != head); + } else { + if (length > 0) + goto out_locked; + + b += nblocks_in_page; + } + unlock_page(page); + + } while (++i < pagevec_count(&pvec)); + + index = page->index + 1; + pagevec_release(&pvec); + cond_resched(); + goto repeat; + +out_locked: + unlock_page(page); +out: + pagevec_release(&pvec); + return length; +} diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h index fb9e8a8..622df27 100644 --- a/fs/nilfs2/page.h +++ b/fs/nilfs2/page.h @@ -66,6 +66,9 @@ void nilfs_mapping_init(struct address_space *mapping, struct backing_dev_info *bdi, const struct address_space_operations *aops); unsigned nilfs_page_count_clean_buffers(struct page *, unsigned, unsigned); +unsigned long nilfs_find_uncommitted_extent(struct inode *inode, + sector_t start_blk, + sector_t *blkoff); #define NILFS_PAGE_BUG(page, m, a...) \ do { nilfs_page_bug(page); BUG(); } while (0) diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c index 5d2711c2..3dfcd3b 100644 --- a/fs/nilfs2/recovery.c +++ b/fs/nilfs2/recovery.c @@ -535,7 +535,7 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs, if (unlikely(err)) goto failed_page; - err = nilfs_set_file_dirty(sbi, inode, 1); + err = nilfs_set_file_dirty(inode, 1); if (unlikely(err)) goto failed_page; diff --git a/fs/nilfs2/sb.h b/fs/nilfs2/sb.h index 35a0715..7a17715 100644 --- a/fs/nilfs2/sb.h +++ b/fs/nilfs2/sb.h @@ -27,14 +27,6 @@ #include <linux/types.h> #include <linux/fs.h> -/* - * Mount options - */ -struct nilfs_mount_options { - unsigned long mount_opt; - __u64 snapshot_cno; -}; - struct the_nilfs; struct nilfs_sc_info; diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 687d090..55ebae5 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -504,17 +504,6 @@ static int nilfs_segctor_add_file_block(struct nilfs_sc_info *sci, return err; } -static int nilfs_handle_bmap_error(int err, const char *fname, - struct inode *inode, struct super_block *sb) -{ - if (err == -EINVAL) { - nilfs_error(sb, fname, "broken bmap (inode=%lu)\n", - inode->i_ino); - err = -EIO; - } - return err; -} - /* * Callback functions that enumerate, mark, and collect dirty blocks */ @@ -524,9 +513,8 @@ static int nilfs_collect_file_data(struct nilfs_sc_info *sci, int err; err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); - if (unlikely(err < 0)) - return nilfs_handle_bmap_error(err, __func__, inode, - sci->sc_super); + if (err < 0) + return err; err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(struct nilfs_binfo_v)); @@ -539,13 +527,7 @@ static int nilfs_collect_file_node(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode) { - int err; - - err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); - if (unlikely(err < 0)) - return nilfs_handle_bmap_error(err, __func__, inode, - sci->sc_super); - return 0; + return nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); } static int nilfs_collect_file_bmap(struct nilfs_sc_info *sci, @@ -588,9 +570,8 @@ static int nilfs_collect_dat_data(struct nilfs_sc_info *sci, int err; err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); - if (unlikely(err < 0)) - return nilfs_handle_bmap_error(err, __func__, inode, - sci->sc_super); + if (err < 0) + return err; err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); if (!err) @@ -776,9 +757,8 @@ static int nilfs_test_metadata_dirty(struct the_nilfs *nilfs, ret++; if (nilfs_mdt_fetch_dirty(nilfs->ns_sufile)) ret++; - if (ret || nilfs_doing_gc()) - if (nilfs_mdt_fetch_dirty(nilfs_dat_inode(nilfs))) - ret++; + if ((ret || nilfs_doing_gc()) && nilfs_mdt_fetch_dirty(nilfs->ns_dat)) + ret++; return ret; } @@ -814,7 +794,7 @@ static void nilfs_segctor_clear_metadata_dirty(struct nilfs_sc_info *sci) nilfs_mdt_clear_dirty(sci->sc_root->ifile); nilfs_mdt_clear_dirty(nilfs->ns_cpfile); nilfs_mdt_clear_dirty(nilfs->ns_sufile); - nilfs_mdt_clear_dirty(nilfs_dat_inode(nilfs)); + nilfs_mdt_clear_dirty(nilfs->ns_dat); } static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci) @@ -923,7 +903,7 @@ static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, nilfs->ns_nongc_ctime : sci->sc_seg_ctime); raw_sr->sr_flags = 0; - nilfs_write_inode_common(nilfs_dat_inode(nilfs), (void *)raw_sr + + nilfs_write_inode_common(nilfs->ns_dat, (void *)raw_sr + NILFS_SR_DAT_OFFSET(isz), 1); nilfs_write_inode_common(nilfs->ns_cpfile, (void *)raw_sr + NILFS_SR_CPFILE_OFFSET(isz), 1); @@ -1179,7 +1159,7 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode) sci->sc_stage.scnt++; /* Fall through */ case NILFS_ST_DAT: dat_stage: - err = nilfs_segctor_scan_file(sci, nilfs_dat_inode(nilfs), + err = nilfs_segctor_scan_file(sci, nilfs->ns_dat, &nilfs_sc_dat_ops); if (unlikely(err)) break; @@ -1563,7 +1543,6 @@ nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci, return 0; failed_bmap: - err = nilfs_handle_bmap_error(err, __func__, inode, sci->sc_super); return err; } @@ -1783,6 +1762,7 @@ static void nilfs_clear_copied_buffers(struct list_head *list, int err) if (!err) { set_buffer_uptodate(bh); clear_buffer_dirty(bh); + clear_buffer_delay(bh); clear_buffer_nilfs_volatile(bh); } brelse(bh); /* for b_assoc_buffers */ @@ -1909,6 +1889,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) b_assoc_buffers) { set_buffer_uptodate(bh); clear_buffer_dirty(bh); + clear_buffer_delay(bh); clear_buffer_nilfs_volatile(bh); clear_buffer_nilfs_redirected(bh); if (bh == segbuf->sb_super_root) { diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 35ae03c..70dfdd5 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -47,7 +47,6 @@ #include <linux/crc32.h> #include <linux/vfs.h> #include <linux/writeback.h> -#include <linux/kobject.h> #include <linux/seq_file.h> #include <linux/mount.h> #include "nilfs.h" @@ -111,12 +110,17 @@ void nilfs_error(struct super_block *sb, const char *function, const char *fmt, ...) { struct nilfs_sb_info *sbi = NILFS_SB(sb); + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_CRIT "NILFS error (device %s): %s: ", sb->s_id, function); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_CRIT "NILFS error (device %s): %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); if (!(sb->s_flags & MS_RDONLY)) { @@ -136,13 +140,17 @@ void nilfs_error(struct super_block *sb, const char *function, void nilfs_warning(struct super_block *sb, const char *function, const char *fmt, ...) { + struct va_format vaf; va_list args; va_start(args, fmt); - printk(KERN_WARNING "NILFS warning (device %s): %s: ", - sb->s_id, function); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_WARNING "NILFS warning (device %s): %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); } @@ -162,10 +170,13 @@ struct inode *nilfs_alloc_inode(struct super_block *sb) return &ii->vfs_inode; } -void nilfs_destroy_inode(struct inode *inode) +static void nilfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); struct nilfs_mdt_info *mdi = NILFS_MDT(inode); + INIT_LIST_HEAD(&inode->i_dentry); + if (mdi) { kfree(mdi->mi_bgl); /* kfree(NULL) is safe */ kfree(mdi); @@ -173,6 +184,11 @@ void nilfs_destroy_inode(struct inode *inode) kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode)); } +void nilfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, nilfs_i_callback); +} + static int nilfs_sync_super(struct nilfs_sb_info *sbi, int flag) { struct the_nilfs *nilfs = sbi->s_nilfs; @@ -838,7 +854,7 @@ static int nilfs_attach_snapshot(struct super_block *s, __u64 cno, static int nilfs_tree_was_touched(struct dentry *root_dentry) { - return atomic_read(&root_dentry->d_count) > 1; + return root_dentry->d_count > 1; } /** @@ -1002,11 +1018,11 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) struct nilfs_sb_info *sbi = NILFS_SB(sb); struct the_nilfs *nilfs = sbi->s_nilfs; unsigned long old_sb_flags; - struct nilfs_mount_options old_opts; + unsigned long old_mount_opt; int err; old_sb_flags = sb->s_flags; - old_opts.mount_opt = sbi->s_mount_opt; + old_mount_opt = sbi->s_mount_opt; if (!parse_options(data, sb, 1)) { err = -EINVAL; @@ -1075,7 +1091,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) restore_opts: sb->s_flags = old_sb_flags; - sbi->s_mount_opt = old_opts.mount_opt; + sbi->s_mount_opt = old_mount_opt; return err; } @@ -1141,9 +1157,9 @@ static int nilfs_test_bdev_super(struct super_block *s, void *data) return (void *)s->s_bdev == data; } -static int -nilfs_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry * +nilfs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { struct nilfs_super_data sd; struct super_block *s; @@ -1156,7 +1172,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type); if (IS_ERR(sd.bdev)) - return PTR_ERR(sd.bdev); + return ERR_CAST(sd.bdev); sd.cno = 0; sd.flags = flags; @@ -1235,9 +1251,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, if (!s_new) close_bdev_exclusive(sd.bdev, mode); - mnt->mnt_sb = s; - mnt->mnt_root = root_dentry; - return 0; + return root_dentry; failed_super: deactivate_locked_super(s); @@ -1245,13 +1259,13 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, failed: if (!s_new) close_bdev_exclusive(sd.bdev, mode); - return err; + return ERR_PTR(err); } struct file_system_type nilfs_fs_type = { .owner = THIS_MODULE, .name = "nilfs2", - .get_sb = nilfs_get_sb, + .mount = nilfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index 0254be2..ad4ac60 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -329,7 +329,6 @@ int load_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi) printk(KERN_INFO "NILFS: recovery complete.\n"); skip_recovery: - set_nilfs_loaded(nilfs); nilfs_clear_recovery_info(&ri); sbi->s_super->s_flags = s_flags; return 0; @@ -651,12 +650,11 @@ int nilfs_discard_segments(struct the_nilfs *nilfs, __u64 *segnump, int nilfs_count_free_blocks(struct the_nilfs *nilfs, sector_t *nblocks) { - struct inode *dat = nilfs_dat_inode(nilfs); unsigned long ncleansegs; - down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile); - up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */ + up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem); *nblocks = (sector_t)ncleansegs * nilfs->ns_blocks_per_segment; return 0; } diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index 69226e1..fd85e4c 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -36,8 +36,6 @@ /* the_nilfs struct */ enum { THE_NILFS_INIT = 0, /* Information from super_block is set */ - THE_NILFS_LOADED, /* Roll-back/roll-forward has done and - the latest checkpoint was loaded */ THE_NILFS_DISCONTINUED, /* 'next' pointer chain has broken */ THE_NILFS_GC_RUNNING, /* gc process is running */ THE_NILFS_SB_DIRTY, /* super block is dirty */ @@ -178,7 +176,6 @@ static inline int nilfs_##name(struct the_nilfs *nilfs) \ } THE_NILFS_FNS(INIT, init) -THE_NILFS_FNS(LOADED, loaded) THE_NILFS_FNS(DISCONTINUED, discontinued) THE_NILFS_FNS(GC_RUNNING, gc_running) THE_NILFS_FNS(SB_DIRTY, sb_dirty) diff --git a/fs/notify/Kconfig b/fs/notify/Kconfig index b388443..22c629e 100644 --- a/fs/notify/Kconfig +++ b/fs/notify/Kconfig @@ -3,4 +3,4 @@ config FSNOTIFY source "fs/notify/dnotify/Kconfig" source "fs/notify/inotify/Kconfig" -#source "fs/notify/fanotify/Kconfig" +source "fs/notify/fanotify/Kconfig" diff --git a/fs/notify/fanotify/Kconfig b/fs/notify/fanotify/Kconfig index 3ac36b7b..7dceff0 100644 --- a/fs/notify/fanotify/Kconfig +++ b/fs/notify/fanotify/Kconfig @@ -6,7 +6,7 @@ config FANOTIFY ---help--- Say Y here to enable fanotify suport. fanotify is a file access notification system which differs from inotify in that it sends - and open file descriptor to the userspace listener along with + an open file descriptor to the userspace listener along with the event. If unsure, say Y. diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index 85366c7..f35794b 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -92,7 +92,11 @@ static int fanotify_get_response_from_access(struct fsnotify_group *group, pr_debug("%s: group=%p event=%p\n", __func__, group, event); - wait_event(group->fanotify_data.access_waitq, event->response); + wait_event(group->fanotify_data.access_waitq, event->response || + atomic_read(&group->fanotify_data.bypass_perm)); + + if (!event->response) /* bypass_perm set */ + return 0; /* userspace responded, convert to something usable */ spin_lock(&event->lock); @@ -131,6 +135,7 @@ static int fanotify_handle_event(struct fsnotify_group *group, BUILD_BUG_ON(FAN_Q_OVERFLOW != FS_Q_OVERFLOW); BUILD_BUG_ON(FAN_OPEN_PERM != FS_OPEN_PERM); BUILD_BUG_ON(FAN_ACCESS_PERM != FS_ACCESS_PERM); + BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR); pr_debug("%s: group=%p event=%p\n", __func__, group, event); @@ -160,20 +165,21 @@ static bool fanotify_should_send_event(struct fsnotify_group *group, __u32 event_mask, void *data, int data_type) { __u32 marks_mask, marks_ignored_mask; + struct path *path = data; pr_debug("%s: group=%p to_tell=%p inode_mark=%p vfsmnt_mark=%p " "mask=%x data=%p data_type=%d\n", __func__, group, to_tell, inode_mark, vfsmnt_mark, event_mask, data, data_type); - /* sorry, fanotify only gives a damn about files and dirs */ - if (!S_ISREG(to_tell->i_mode) && - !S_ISDIR(to_tell->i_mode)) - return false; - /* if we don't have enough info to send an event to userspace say no */ if (data_type != FSNOTIFY_EVENT_PATH) return false; + /* sorry, fanotify only gives a damn about files and dirs */ + if (!S_ISREG(path->dentry->d_inode->i_mode) && + !S_ISDIR(path->dentry->d_inode->i_mode)) + return false; + if (inode_mark && vfsmnt_mark) { marks_mask = (vfsmnt_mark->mask | inode_mark->mask); marks_ignored_mask = (vfsmnt_mark->ignored_mask | inode_mark->ignored_mask); @@ -194,16 +200,29 @@ static bool fanotify_should_send_event(struct fsnotify_group *group, BUG(); } + if (S_ISDIR(path->dentry->d_inode->i_mode) && + (marks_ignored_mask & FS_ISDIR)) + return false; + if (event_mask & marks_mask & ~marks_ignored_mask) return true; return false; } +static void fanotify_free_group_priv(struct fsnotify_group *group) +{ + struct user_struct *user; + + user = group->fanotify_data.user; + atomic_dec(&user->fanotify_listeners); + free_uid(user); +} + const struct fsnotify_ops fanotify_fsnotify_ops = { .handle_event = fanotify_handle_event, .should_send_event = fanotify_should_send_event, - .free_group_priv = NULL, + .free_group_priv = fanotify_free_group_priv, .free_event_priv = NULL, .freeing_mark = NULL, }; diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index bbcb98e..8b61220 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -16,6 +16,10 @@ #include <asm/ioctls.h> +#define FANOTIFY_DEFAULT_MAX_EVENTS 16384 +#define FANOTIFY_DEFAULT_MAX_MARKS 8192 +#define FANOTIFY_DEFAULT_MAX_LISTENERS 128 + extern const struct fsnotify_ops fanotify_fsnotify_ops; static struct kmem_cache *fanotify_mark_cache __read_mostly; @@ -102,20 +106,29 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event) return client_fd; } -static ssize_t fill_event_metadata(struct fsnotify_group *group, +static int fill_event_metadata(struct fsnotify_group *group, struct fanotify_event_metadata *metadata, struct fsnotify_event *event) { + int ret = 0; + pr_debug("%s: group=%p metadata=%p event=%p\n", __func__, group, metadata, event); metadata->event_len = FAN_EVENT_METADATA_LEN; + metadata->metadata_len = FAN_EVENT_METADATA_LEN; metadata->vers = FANOTIFY_METADATA_VERSION; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); - metadata->fd = create_fd(group, event); + if (unlikely(event->mask & FAN_Q_OVERFLOW)) + metadata->fd = FAN_NOFD; + else { + metadata->fd = create_fd(group, event); + if (metadata->fd < 0) + ret = metadata->fd; + } - return metadata->fd; + return ret; } #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS @@ -196,7 +209,7 @@ static int prepare_for_access_response(struct fsnotify_group *group, mutex_lock(&group->fanotify_data.access_mutex); - if (group->fanotify_data.bypass_perm) { + if (atomic_read(&group->fanotify_data.bypass_perm)) { mutex_unlock(&group->fanotify_data.access_mutex); kmem_cache_free(fanotify_response_event_cache, re); event->response = FAN_ALLOW; @@ -253,24 +266,34 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, pr_debug("%s: group=%p event=%p\n", __func__, group, event); - fd = fill_event_metadata(group, &fanotify_event_metadata, event); - if (fd < 0) - return fd; + ret = fill_event_metadata(group, &fanotify_event_metadata, event); + if (ret < 0) + goto out; + fd = fanotify_event_metadata.fd; ret = prepare_for_access_response(group, event, fd); if (ret) goto out_close_fd; ret = -EFAULT; - if (copy_to_user(buf, &fanotify_event_metadata, FAN_EVENT_METADATA_LEN)) + if (copy_to_user(buf, &fanotify_event_metadata, + fanotify_event_metadata.event_len)) goto out_kill_access_response; - return FAN_EVENT_METADATA_LEN; + return fanotify_event_metadata.event_len; out_kill_access_response: remove_access_response(group, event, fd); out_close_fd: - sys_close(fd); + if (fd != FAN_NOFD) + sys_close(fd); +out: +#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + if (event->mask & FAN_ALL_PERM_EVENTS) { + event->response = FAN_DENY; + wake_up(&group->fanotify_data.access_waitq); + } +#endif return ret; } @@ -326,7 +349,7 @@ static ssize_t fanotify_read(struct file *file, char __user *buf, ret = -EAGAIN; if (file->f_flags & O_NONBLOCK) break; - ret = -EINTR; + ret = -ERESTARTSYS; if (signal_pending(current)) break; @@ -372,14 +395,13 @@ static ssize_t fanotify_write(struct file *file, const char __user *buf, size_t static int fanotify_release(struct inode *ignored, struct file *file) { struct fsnotify_group *group = file->private_data; - struct fanotify_response_event *re, *lre; - - pr_debug("%s: file=%p group=%p\n", __func__, file, group); #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + struct fanotify_response_event *re, *lre; + mutex_lock(&group->fanotify_data.access_mutex); - group->fanotify_data.bypass_perm = true; + atomic_inc(&group->fanotify_data.bypass_perm); list_for_each_entry_safe(re, lre, &group->fanotify_data.access_list, list) { pr_debug("%s: found group=%p re=%p event=%p\n", __func__, group, @@ -554,18 +576,24 @@ static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark, __u32 mask, unsigned int flags) { - __u32 oldmask; + __u32 oldmask = -1; spin_lock(&fsn_mark->lock); if (!(flags & FAN_MARK_IGNORED_MASK)) { oldmask = fsn_mark->mask; fsnotify_set_mark_mask_locked(fsn_mark, (oldmask | mask)); } else { - oldmask = fsn_mark->ignored_mask; - fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask | mask)); + __u32 tmask = fsn_mark->ignored_mask | mask; + fsnotify_set_mark_ignored_mask_locked(fsn_mark, tmask); if (flags & FAN_MARK_IGNORED_SURV_MODIFY) fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY; } + + if (!(flags & FAN_MARK_ONDIR)) { + __u32 tmask = fsn_mark->ignored_mask | FAN_ONDIR; + fsnotify_set_mark_ignored_mask_locked(fsn_mark, tmask); + } + spin_unlock(&fsn_mark->lock); return mask & ~oldmask; @@ -577,10 +605,12 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, { struct fsnotify_mark *fsn_mark; __u32 added; + int ret = 0; fsn_mark = fsnotify_find_vfsmount_mark(group, mnt); if (!fsn_mark) { - int ret; + if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks) + return -ENOSPC; fsn_mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL); if (!fsn_mark) @@ -588,17 +618,16 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, fsnotify_init_mark(fsn_mark, fanotify_free_mark); ret = fsnotify_add_mark(fsn_mark, group, NULL, mnt, 0); - if (ret) { - fanotify_free_mark(fsn_mark); - return ret; - } + if (ret) + goto err; } added = fanotify_mark_add_to_mask(fsn_mark, mask, flags); - fsnotify_put_mark(fsn_mark); + if (added & ~mnt->mnt_fsnotify_mask) fsnotify_recalc_vfsmount_mask(mnt); - - return 0; +err: + fsnotify_put_mark(fsn_mark); + return ret; } static int fanotify_add_inode_mark(struct fsnotify_group *group, @@ -607,12 +636,24 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, { struct fsnotify_mark *fsn_mark; __u32 added; + int ret = 0; pr_debug("%s: group=%p inode=%p\n", __func__, group, inode); + /* + * If some other task has this inode open for write we should not add + * an ignored mark, unless that ignored mark is supposed to survive + * modification changes anyway. + */ + if ((flags & FAN_MARK_IGNORED_MASK) && + !(flags & FAN_MARK_IGNORED_SURV_MODIFY) && + (atomic_read(&inode->i_writecount) > 0)) + return 0; + fsn_mark = fsnotify_find_inode_mark(group, inode); if (!fsn_mark) { - int ret; + if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks) + return -ENOSPC; fsn_mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL); if (!fsn_mark) @@ -620,16 +661,16 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, fsnotify_init_mark(fsn_mark, fanotify_free_mark); ret = fsnotify_add_mark(fsn_mark, group, inode, NULL, 0); - if (ret) { - fanotify_free_mark(fsn_mark); - return ret; - } + if (ret) + goto err; } added = fanotify_mark_add_to_mask(fsn_mark, mask, flags); - fsnotify_put_mark(fsn_mark); + if (added & ~inode->i_fsnotify_mask) fsnotify_recalc_inode_mask(inode); - return 0; +err: + fsnotify_put_mark(fsn_mark); + return ret; } /* fanotify syscalls */ @@ -637,6 +678,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) { struct fsnotify_group *group; int f_flags, fd; + struct user_struct *user; pr_debug("%s: flags=%d event_f_flags=%d\n", __func__, flags, event_f_flags); @@ -647,6 +689,12 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) if (flags & ~FAN_ALL_INIT_FLAGS) return -EINVAL; + user = get_current_user(); + if (atomic_read(&user->fanotify_listeners) > FANOTIFY_DEFAULT_MAX_LISTENERS) { + free_uid(user); + return -EMFILE; + } + f_flags = O_RDWR | FMODE_NONOTIFY; if (flags & FAN_CLOEXEC) f_flags |= O_CLOEXEC; @@ -655,15 +703,53 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) /* fsnotify_alloc_group takes a ref. Dropped in fanotify_release */ group = fsnotify_alloc_group(&fanotify_fsnotify_ops); - if (IS_ERR(group)) + if (IS_ERR(group)) { + free_uid(user); return PTR_ERR(group); + } + + group->fanotify_data.user = user; + atomic_inc(&user->fanotify_listeners); group->fanotify_data.f_flags = event_f_flags; #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS mutex_init(&group->fanotify_data.access_mutex); init_waitqueue_head(&group->fanotify_data.access_waitq); INIT_LIST_HEAD(&group->fanotify_data.access_list); + atomic_set(&group->fanotify_data.bypass_perm, 0); #endif + switch (flags & FAN_ALL_CLASS_BITS) { + case FAN_CLASS_NOTIF: + group->priority = FS_PRIO_0; + break; + case FAN_CLASS_CONTENT: + group->priority = FS_PRIO_1; + break; + case FAN_CLASS_PRE_CONTENT: + group->priority = FS_PRIO_2; + break; + default: + fd = -EINVAL; + goto out_put_group; + } + + if (flags & FAN_UNLIMITED_QUEUE) { + fd = -EPERM; + if (!capable(CAP_SYS_ADMIN)) + goto out_put_group; + group->max_events = UINT_MAX; + } else { + group->max_events = FANOTIFY_DEFAULT_MAX_EVENTS; + } + + if (flags & FAN_UNLIMITED_MARKS) { + fd = -EPERM; + if (!capable(CAP_SYS_ADMIN)) + goto out_put_group; + group->fanotify_data.max_marks = UINT_MAX; + } else { + group->fanotify_data.max_marks = FANOTIFY_DEFAULT_MAX_MARKS; + } fd = anon_inode_getfd("[fanotify]", &fanotify_fops, group, f_flags); if (fd < 0) @@ -697,13 +783,21 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags, if (flags & ~FAN_ALL_MARK_FLAGS) return -EINVAL; switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) { - case FAN_MARK_ADD: + case FAN_MARK_ADD: /* fallthrough */ case FAN_MARK_REMOVE: + if (!mask) + return -EINVAL; case FAN_MARK_FLUSH: break; default: return -EINVAL; } + + if (mask & FAN_ONDIR) { + flags |= FAN_MARK_ONDIR; + mask &= ~FAN_ONDIR; + } + #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS if (mask & ~(FAN_ALL_EVENTS | FAN_ALL_PERM_EVENTS | FAN_EVENT_ON_CHILD)) #else @@ -719,6 +813,16 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags, ret = -EINVAL; if (unlikely(filp->f_op != &fanotify_fops)) goto fput_and_out; + group = filp->private_data; + + /* + * group->priority == FS_PRIO_0 == FAN_CLASS_NOTIF. These are not + * allowed to set permissions events. + */ + ret = -EINVAL; + if (mask & FAN_ALL_PERM_EVENTS && + group->priority == FS_PRIO_0) + goto fput_and_out; ret = fanotify_find_path(dfd, pathname, &path, flags); if (ret) @@ -729,7 +833,6 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags, inode = path.dentry->d_inode; else mnt = path.mnt; - group = filp->private_data; /* create/update an inode mark */ switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) { diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c index 4498a20..79b47cb 100644 --- a/fs/notify/fsnotify.c +++ b/fs/notify/fsnotify.c @@ -59,7 +59,7 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode) /* determine if the children should tell inode about their events */ watched = fsnotify_inode_watches_children(inode); - spin_lock(&dcache_lock); + spin_lock(&inode->i_lock); /* run all of the dentries associated with this inode. Since this is a * directory, there damn well better only be one item on this list */ list_for_each_entry(alias, &inode->i_dentry, d_alias) { @@ -68,32 +68,35 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode) /* run all of the children of the original inode and fix their * d_flags to indicate parental interest (their parent is the * original inode) */ + spin_lock(&alias->d_lock); list_for_each_entry(child, &alias->d_subdirs, d_u.d_child) { if (!child->d_inode) continue; - spin_lock(&child->d_lock); + spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED); if (watched) child->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED; else child->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED; spin_unlock(&child->d_lock); } + spin_unlock(&alias->d_lock); } - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); } /* Notify this dentry's parent about a child's events. */ -void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) +int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) { struct dentry *parent; struct inode *p_inode; + int ret = 0; if (!dentry) dentry = path->dentry; if (!(dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED)) - return; + return 0; parent = dget_parent(dentry); p_inode = parent->d_inode; @@ -106,14 +109,16 @@ void __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask) mask |= FS_EVENT_ON_CHILD; if (path) - fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH, - dentry->d_name.name, 0); + ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH, + dentry->d_name.name, 0); else - fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE, - dentry->d_name.name, 0); + ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE, + dentry->d_name.name, 0); } dput(parent); + + return ret; } EXPORT_SYMBOL_GPL(__fsnotify_parent); @@ -252,20 +257,23 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, if (inode_group > vfsmount_group) { /* handle inode */ - send_to_group(to_tell, NULL, inode_mark, NULL, mask, data, - data_is, cookie, file_name, &event); + ret = send_to_group(to_tell, NULL, inode_mark, NULL, mask, data, + data_is, cookie, file_name, &event); /* we didn't use the vfsmount_mark */ vfsmount_group = NULL; } else if (vfsmount_group > inode_group) { - send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data, - data_is, cookie, file_name, &event); + ret = send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data, + data_is, cookie, file_name, &event); inode_group = NULL; } else { - send_to_group(to_tell, mnt, inode_mark, vfsmount_mark, - mask, data, data_is, cookie, file_name, - &event); + ret = send_to_group(to_tell, mnt, inode_mark, vfsmount_mark, + mask, data, data_is, cookie, file_name, + &event); } + if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS)) + goto out; + if (inode_group) inode_node = srcu_dereference(inode_node->next, &fsnotify_mark_srcu); @@ -273,7 +281,8 @@ int fsnotify(struct inode *to_tell, __u32 mask, void *data, int data_is, vfsmount_node = srcu_dereference(vfsmount_node->next, &fsnotify_mark_srcu); } - + ret = 0; +out: srcu_read_unlock(&fsnotify_mark_srcu, idx); /* * fsnotify_create_event() took a reference so the event can't be cleaned diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c index 21ed106..4c29fcf 100644 --- a/fs/notify/inode_mark.c +++ b/fs/notify/inode_mark.c @@ -177,7 +177,8 @@ void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *mark, * Attach an initialized mark to a given inode. * These marks may be used for the fsnotify backend to determine which * event types should be delivered to which group and for which inodes. These - * marks are ordered according to the group's location in memory. + * marks are ordered according to priority, highest number first, and then by + * the group's location in memory. */ int fsnotify_add_inode_mark(struct fsnotify_mark *mark, struct fsnotify_group *group, struct inode *inode, @@ -211,7 +212,11 @@ int fsnotify_add_inode_mark(struct fsnotify_mark *mark, goto out; } - if (mark->group < lmark->group) + if (mark->group->priority < lmark->group->priority) + continue; + + if ((mark->group->priority == lmark->group->priority) && + (mark->group < lmark->group)) continue; hlist_add_before_rcu(&mark->i.i_list, &lmark->i.i_list); diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index 24edc11..4cd5d5d 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -752,6 +752,7 @@ SYSCALL_DEFINE1(inotify_init1, int, flags) if (ret >= 0) return ret; + fsnotify_put_group(group); atomic_dec(&user->inotify_devs); out_free_uid: free_uid(user); @@ -862,7 +863,7 @@ static int __init inotify_user_setup(void) BUILD_BUG_ON(IN_Q_OVERFLOW != FS_Q_OVERFLOW); BUILD_BUG_ON(IN_IGNORED != FS_IN_IGNORED); BUILD_BUG_ON(IN_EXCL_UNLINK != FS_EXCL_UNLINK); - BUILD_BUG_ON(IN_ISDIR != FS_IN_ISDIR); + BUILD_BUG_ON(IN_ISDIR != FS_ISDIR); BUILD_BUG_ON(IN_ONESHOT != FS_IN_ONESHOT); BUG_ON(hweight32(ALL_INOTIFY_BITS) != 21); diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c index 56772b5..85eebff 100644 --- a/fs/notify/vfsmount_mark.c +++ b/fs/notify/vfsmount_mark.c @@ -169,7 +169,11 @@ int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark, goto out; } - if (mark->group < lmark->group) + if (mark->group->priority < lmark->group->priority) + continue; + + if ((mark->group->priority == lmark->group->priority) && + (mark->group < lmark->group)) continue; hlist_add_before_rcu(&mark->m.m_list, &lmark->m.m_list); diff --git a/fs/ntfs/Makefile b/fs/ntfs/Makefile index 58b6be9..4ff028f 100644 --- a/fs/ntfs/Makefile +++ b/fs/ntfs/Makefile @@ -6,7 +6,7 @@ ntfs-objs := aops.o attrib.o collate.o compress.o debug.o dir.o file.o \ index.o inode.o mft.o mst.o namei.o runlist.o super.o sysctl.o \ unistr.o upcase.o -EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.29\" +EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.30\" ifeq ($(CONFIG_NTFS_DEBUG),y) EXTRA_CFLAGS += -DDEBUG diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index 113ebd9..f4b1057 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -1,7 +1,7 @@ /* * file.c - NTFS kernel file operations. Part of the Linux-NTFS project. * - * Copyright (c) 2001-2007 Anton Altaparmakov + * Copyright (c) 2001-2011 Anton Altaparmakov and Tuxera Inc. * * This program/include file is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as published @@ -1380,15 +1380,14 @@ static inline void ntfs_set_next_iovec(const struct iovec **iovp, * pages (out to offset + bytes), to emulate ntfs_copy_from_user()'s * single-segment behaviour. * - * We call the same helper (__ntfs_copy_from_user_iovec_inatomic()) both - * when atomic and when not atomic. This is ok because - * __ntfs_copy_from_user_iovec_inatomic() calls __copy_from_user_inatomic() - * and it is ok to call this when non-atomic. - * Infact, the only difference between __copy_from_user_inatomic() and + * We call the same helper (__ntfs_copy_from_user_iovec_inatomic()) both when + * atomic and when not atomic. This is ok because it calls + * __copy_from_user_inatomic() and it is ok to call this when non-atomic. In + * fact, the only difference between __copy_from_user_inatomic() and * __copy_from_user() is that the latter calls might_sleep() and the former - * should not zero the tail of the buffer on error. And on many - * architectures __copy_from_user_inatomic() is just defined to - * __copy_from_user() so it makes no difference at all on those architectures. + * should not zero the tail of the buffer on error. And on many architectures + * __copy_from_user_inatomic() is just defined to __copy_from_user() so it + * makes no difference at all on those architectures. */ static inline size_t ntfs_copy_from_user_iovec(struct page **pages, unsigned nr_pages, unsigned ofs, const struct iovec **iov, @@ -1409,28 +1408,28 @@ static inline size_t ntfs_copy_from_user_iovec(struct page **pages, if (unlikely(copied != len)) { /* Do it the slow way. */ addr = kmap(*pages); - copied = __ntfs_copy_from_user_iovec_inatomic(addr + ofs, - *iov, *iov_ofs, len); - /* - * Zero the rest of the target like __copy_from_user(). - */ - memset(addr + ofs + copied, 0, len - copied); - kunmap(*pages); + copied = __ntfs_copy_from_user_iovec_inatomic(addr + + ofs, *iov, *iov_ofs, len); if (unlikely(copied != len)) goto err_out; + kunmap(*pages); } total += len; + ntfs_set_next_iovec(iov, iov_ofs, len); bytes -= len; if (!bytes) break; - ntfs_set_next_iovec(iov, iov_ofs, len); ofs = 0; } while (++pages < last_page); out: return total; err_out: - total += copied; + BUG_ON(copied > len); /* Zero the rest of the target like __copy_from_user(). */ + memset(addr + ofs + copied, 0, len - copied); + kunmap(*pages); + total += copied; + ntfs_set_next_iovec(iov, iov_ofs, copied); while (++pages < last_page) { bytes -= len; if (!bytes) diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c index 93622b1..a627ed8 100644 --- a/fs/ntfs/inode.c +++ b/fs/ntfs/inode.c @@ -332,6 +332,13 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb) return NULL; } +static void ntfs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode)); +} + void ntfs_destroy_big_inode(struct inode *inode) { ntfs_inode *ni = NTFS_I(inode); @@ -340,7 +347,7 @@ void ntfs_destroy_big_inode(struct inode *inode) BUG_ON(ni->page); if (!atomic_dec_and_test(&ni->count)) BUG(); - kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode)); + call_rcu(&inode->i_rcu, ntfs_i_callback); } static inline ntfs_inode *ntfs_alloc_extent_inode(void) diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c index d3fbe57..29099a0 100644 --- a/fs/ntfs/super.c +++ b/fs/ntfs/super.c @@ -1,7 +1,7 @@ /* * super.c - NTFS kernel super block handling. Part of the Linux-NTFS project. * - * Copyright (c) 2001-2007 Anton Altaparmakov + * Copyright (c) 2001-2011 Anton Altaparmakov and Tuxera Inc. * Copyright (c) 2001,2002 Richard Russon * * This program/include file is free software; you can redistribute it and/or @@ -3059,17 +3059,16 @@ struct kmem_cache *ntfs_index_ctx_cache; /* Driver wide mutex. */ DEFINE_MUTEX(ntfs_lock); -static int ntfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *ntfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, ntfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, ntfs_fill_super); } static struct file_system_type ntfs_fs_type = { .owner = THIS_MODULE, .name = "ntfs", - .get_sb = ntfs_get_sb, + .mount = ntfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -3194,8 +3193,8 @@ static void __exit exit_ntfs_fs(void) ntfs_sysctl(0); } -MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>"); -MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2007 Anton Altaparmakov"); +MODULE_AUTHOR("Anton Altaparmakov <anton@tuxera.com>"); +MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2011 Anton Altaparmakov and Tuxera Inc."); MODULE_VERSION(NTFS_VERSION); MODULE_LICENSE("GPL"); #ifdef DEBUG diff --git a/fs/ocfs2/Kconfig b/fs/ocfs2/Kconfig index 0d84066..ab152c0 100644 --- a/fs/ocfs2/Kconfig +++ b/fs/ocfs2/Kconfig @@ -51,7 +51,7 @@ config OCFS2_FS_USERSPACE_CLUSTER config OCFS2_FS_STATS bool "OCFS2 statistics" - depends on OCFS2_FS + depends on OCFS2_FS && DEBUG_FS default y help This option allows some fs statistics to be captured. Enabling diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c index 3919150..704f6b1 100644 --- a/fs/ocfs2/acl.c +++ b/fs/ocfs2/acl.c @@ -291,13 +291,17 @@ static int ocfs2_set_acl(handle_t *handle, return ret; } -int ocfs2_check_acl(struct inode *inode, int mask) +int ocfs2_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_super *osb; struct buffer_head *di_bh = NULL; struct posix_acl *acl; int ret = -EAGAIN; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + + osb = OCFS2_SB(inode->i_sb); if (!(osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL)) return ret; diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h index 5c5d31f..4fe7c9c 100644 --- a/fs/ocfs2/acl.h +++ b/fs/ocfs2/acl.h @@ -26,7 +26,7 @@ struct ocfs2_acl_entry { __le32 e_id; }; -extern int ocfs2_check_acl(struct inode *, int); +extern int ocfs2_check_acl(struct inode *, int, unsigned int); extern int ocfs2_acl_chmod(struct inode *); extern int ocfs2_init_acl(handle_t *, struct inode *, struct inode *, struct buffer_head *, struct buffer_head *, diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c index 592fae5..e4984e2 100644 --- a/fs/ocfs2/alloc.c +++ b/fs/ocfs2/alloc.c @@ -565,7 +565,6 @@ static inline int ocfs2_et_sanity_check(struct ocfs2_extent_tree *et) return ret; } -static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc); static int ocfs2_cache_extent_block_free(struct ocfs2_cached_dealloc_ctxt *ctxt, struct ocfs2_extent_block *eb); static void ocfs2_adjust_rightmost_records(handle_t *handle, @@ -5858,6 +5857,7 @@ int ocfs2_truncate_log_append(struct ocfs2_super *osb, ocfs2_journal_dirty(handle, tl_bh); + osb->truncated_clusters += num_clusters; bail: mlog_exit(status); return status; @@ -5929,6 +5929,8 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb, i--; } + osb->truncated_clusters = 0; + bail: mlog_exit(status); return status; @@ -7139,64 +7141,6 @@ bail: } /* - * Expects the inode to already be locked. - */ -int ocfs2_prepare_truncate(struct ocfs2_super *osb, - struct inode *inode, - struct buffer_head *fe_bh, - struct ocfs2_truncate_context **tc) -{ - int status; - unsigned int new_i_clusters; - struct ocfs2_dinode *fe; - struct ocfs2_extent_block *eb; - struct buffer_head *last_eb_bh = NULL; - - mlog_entry_void(); - - *tc = NULL; - - new_i_clusters = ocfs2_clusters_for_bytes(osb->sb, - i_size_read(inode)); - fe = (struct ocfs2_dinode *) fe_bh->b_data; - - mlog(0, "fe->i_clusters = %u, new_i_clusters = %u, fe->i_size =" - "%llu\n", le32_to_cpu(fe->i_clusters), new_i_clusters, - (unsigned long long)le64_to_cpu(fe->i_size)); - - *tc = kzalloc(sizeof(struct ocfs2_truncate_context), GFP_KERNEL); - if (!(*tc)) { - status = -ENOMEM; - mlog_errno(status); - goto bail; - } - ocfs2_init_dealloc_ctxt(&(*tc)->tc_dealloc); - - if (fe->id2.i_list.l_tree_depth) { - status = ocfs2_read_extent_block(INODE_CACHE(inode), - le64_to_cpu(fe->i_last_eb_blk), - &last_eb_bh); - if (status < 0) { - mlog_errno(status); - goto bail; - } - eb = (struct ocfs2_extent_block *) last_eb_bh->b_data; - } - - (*tc)->tc_last_eb_bh = last_eb_bh; - - status = 0; -bail: - if (status < 0) { - if (*tc) - ocfs2_free_truncate_context(*tc); - *tc = NULL; - } - mlog_exit_void(); - return status; -} - -/* * 'start' is inclusive, 'end' is not. */ int ocfs2_truncate_inline(struct inode *inode, struct buffer_head *di_bh, @@ -7270,18 +7214,3 @@ out_commit: out: return ret; } - -static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc) -{ - /* - * The caller is responsible for completing deallocation - * before freeing the context. - */ - if (tc->tc_dealloc.c_first_suballocator != NULL) - mlog(ML_NOTICE, - "Truncate completion has non-empty dealloc context\n"); - - brelse(tc->tc_last_eb_bh); - - kfree(tc); -} diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h index 55762b5..3bd08a0 100644 --- a/fs/ocfs2/alloc.h +++ b/fs/ocfs2/alloc.h @@ -228,10 +228,6 @@ struct ocfs2_truncate_context { int ocfs2_zero_range_for_truncate(struct inode *inode, handle_t *handle, u64 range_start, u64 range_end); -int ocfs2_prepare_truncate(struct ocfs2_super *osb, - struct inode *inode, - struct buffer_head *fe_bh, - struct ocfs2_truncate_context **tc); int ocfs2_commit_truncate(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *di_bh); diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index f1e962c..1fbb0e2 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -573,11 +573,14 @@ static void ocfs2_dio_end_io(struct kiocb *iocb, /* this io's submitter should not have unlocked this before we could */ BUG_ON(!ocfs2_iocb_is_rw_locked(iocb)); + if (ocfs2_iocb_is_sem_locked(iocb)) { + up_read(&inode->i_alloc_sem); + ocfs2_iocb_clear_sem_locked(iocb); + } + ocfs2_iocb_clear_rw_locked(iocb); level = ocfs2_iocb_rw_locked_level(iocb); - if (!level) - up_read(&inode->i_alloc_sem); ocfs2_rw_unlock(inode, level); if (is_async) @@ -1627,6 +1630,43 @@ static int ocfs2_zero_tail(struct inode *inode, struct buffer_head *di_bh, return ret; } +/* + * Try to flush truncate logs if we can free enough clusters from it. + * As for return value, "< 0" means error, "0" no space and "1" means + * we have freed enough spaces and let the caller try to allocate again. + */ +static int ocfs2_try_to_free_truncate_log(struct ocfs2_super *osb, + unsigned int needed) +{ + tid_t target; + int ret = 0; + unsigned int truncated_clusters; + + mutex_lock(&osb->osb_tl_inode->i_mutex); + truncated_clusters = osb->truncated_clusters; + mutex_unlock(&osb->osb_tl_inode->i_mutex); + + /* + * Check whether we can succeed in allocating if we free + * the truncate log. + */ + if (truncated_clusters < needed) + goto out; + + ret = ocfs2_flush_truncate_log(osb); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (jbd2_journal_start_commit(osb->journal->j_journal, &target)) { + jbd2_log_wait_commit(osb->journal->j_journal, target); + ret = 1; + } +out: + return ret; +} + int ocfs2_write_begin_nolock(struct file *filp, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, @@ -1634,7 +1674,7 @@ int ocfs2_write_begin_nolock(struct file *filp, struct buffer_head *di_bh, struct page *mmap_page) { int ret, cluster_of_pages, credits = OCFS2_INODE_UPDATE_CREDITS; - unsigned int clusters_to_alloc, extents_to_split; + unsigned int clusters_to_alloc, extents_to_split, clusters_need = 0; struct ocfs2_write_ctxt *wc; struct inode *inode = mapping->host; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); @@ -1643,7 +1683,9 @@ int ocfs2_write_begin_nolock(struct file *filp, struct ocfs2_alloc_context *meta_ac = NULL; handle_t *handle; struct ocfs2_extent_tree et; + int try_free = 1, ret1; +try_again: ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh); if (ret) { mlog_errno(ret); @@ -1678,6 +1720,7 @@ int ocfs2_write_begin_nolock(struct file *filp, mlog_errno(ret); goto out; } else if (ret == 1) { + clusters_need = wc->w_clen; ret = ocfs2_refcount_cow(inode, filp, di_bh, wc->w_cpos, wc->w_clen, UINT_MAX); if (ret) { @@ -1692,6 +1735,7 @@ int ocfs2_write_begin_nolock(struct file *filp, mlog_errno(ret); goto out; } + clusters_need += clusters_to_alloc; di = (struct ocfs2_dinode *)wc->w_di_bh->b_data; @@ -1814,6 +1858,22 @@ out: ocfs2_free_alloc_context(data_ac); if (meta_ac) ocfs2_free_alloc_context(meta_ac); + + if (ret == -ENOSPC && try_free) { + /* + * Try to free some truncate log so that we can have enough + * clusters to allocate. + */ + try_free = 0; + + ret1 = ocfs2_try_to_free_truncate_log(osb, clusters_need); + if (ret1 == 1) + goto try_again; + + if (ret1 < 0) + mlog_errno(ret1); + } + return ret; } diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h index 76bfdfd..eceb456 100644 --- a/fs/ocfs2/aops.h +++ b/fs/ocfs2/aops.h @@ -68,8 +68,27 @@ static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) else clear_bit(1, (unsigned long *)&iocb->private); } + +/* + * Using a named enum representing lock types in terms of #N bit stored in + * iocb->private, which is going to be used for communication bewteen + * ocfs2_dio_end_io() and ocfs2_file_aio_write/read(). + */ +enum ocfs2_iocb_lock_bits { + OCFS2_IOCB_RW_LOCK = 0, + OCFS2_IOCB_RW_LOCK_LEVEL, + OCFS2_IOCB_SEM, + OCFS2_IOCB_NUM_LOCKS +}; + #define ocfs2_iocb_clear_rw_locked(iocb) \ - clear_bit(0, (unsigned long *)&iocb->private) + clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) #define ocfs2_iocb_rw_locked_level(iocb) \ - test_bit(1, (unsigned long *)&iocb->private) + test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) +#define ocfs2_iocb_set_sem_locked(iocb) \ + set_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) +#define ocfs2_iocb_clear_sem_locked(iocb) \ + clear_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) +#define ocfs2_iocb_is_sem_locked(iocb) \ + test_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) #endif /* OCFS2_FILE_H */ diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index 52c7557..a6cc053 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -82,6 +82,7 @@ static unsigned long o2hb_failed_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)]; #define O2HB_DB_TYPE_REGION_LIVENODES 4 #define O2HB_DB_TYPE_REGION_NUMBER 5 #define O2HB_DB_TYPE_REGION_ELAPSED_TIME 6 +#define O2HB_DB_TYPE_REGION_PINNED 7 struct o2hb_debug_buf { int db_type; int db_size; @@ -101,6 +102,7 @@ static struct o2hb_debug_buf *o2hb_db_failedregions; #define O2HB_DEBUG_FAILEDREGIONS "failed_regions" #define O2HB_DEBUG_REGION_NUMBER "num" #define O2HB_DEBUG_REGION_ELAPSED_TIME "elapsed_time_in_ms" +#define O2HB_DEBUG_REGION_PINNED "pinned" static struct dentry *o2hb_debug_dir; static struct dentry *o2hb_debug_livenodes; @@ -132,6 +134,33 @@ char *o2hb_heartbeat_mode_desc[O2HB_HEARTBEAT_NUM_MODES] = { unsigned int o2hb_dead_threshold = O2HB_DEFAULT_DEAD_THRESHOLD; unsigned int o2hb_heartbeat_mode = O2HB_HEARTBEAT_LOCAL; +/* + * o2hb_dependent_users tracks the number of registered callbacks that depend + * on heartbeat. o2net and o2dlm are two entities that register this callback. + * However only o2dlm depends on the heartbeat. It does not want the heartbeat + * to stop while a dlm domain is still active. + */ +unsigned int o2hb_dependent_users; + +/* + * In global heartbeat mode, all regions are pinned if there are one or more + * dependent users and the quorum region count is <= O2HB_PIN_CUT_OFF. All + * regions are unpinned if the region count exceeds the cut off or the number + * of dependent users falls to zero. + */ +#define O2HB_PIN_CUT_OFF 3 + +/* + * In local heartbeat mode, we assume the dlm domain name to be the same as + * region uuid. This is true for domains created for the file system but not + * necessarily true for userdlm domains. This is a known limitation. + * + * In global heartbeat mode, we pin/unpin all o2hb regions. This solution + * works for both file system and userdlm domains. + */ +static int o2hb_region_pin(const char *region_uuid); +static void o2hb_region_unpin(const char *region_uuid); + /* Only sets a new threshold if there are no active regions. * * No locking or otherwise interesting code is required for reading @@ -186,7 +215,9 @@ struct o2hb_region { struct config_item hr_item; struct list_head hr_all_item; - unsigned hr_unclean_stop:1; + unsigned hr_unclean_stop:1, + hr_item_pinned:1, + hr_item_dropped:1; /* protected by the hr_callback_sem */ struct task_struct *hr_task; @@ -212,9 +243,11 @@ struct o2hb_region { struct dentry *hr_debug_livenodes; struct dentry *hr_debug_regnum; struct dentry *hr_debug_elapsed_time; + struct dentry *hr_debug_pinned; struct o2hb_debug_buf *hr_db_livenodes; struct o2hb_debug_buf *hr_db_regnum; struct o2hb_debug_buf *hr_db_elapsed_time; + struct o2hb_debug_buf *hr_db_pinned; /* let the person setting up hb wait for it to return until it * has reached a 'steady' state. This will be fixed when we have @@ -307,8 +340,7 @@ static void o2hb_arm_write_timeout(struct o2hb_region *reg) static void o2hb_disarm_write_timeout(struct o2hb_region *reg) { - cancel_delayed_work(®->hr_write_timeout_work); - flush_scheduled_work(); + cancel_delayed_work_sync(®->hr_write_timeout_work); } static inline void o2hb_bio_wait_init(struct o2hb_bio_wait_ctxt *wc) @@ -702,6 +734,14 @@ static void o2hb_set_quorum_device(struct o2hb_region *reg, config_item_name(®->hr_item)); set_bit(reg->hr_region_num, o2hb_quorum_region_bitmap); + + /* + * If global heartbeat active, unpin all regions if the + * region count > CUT_OFF + */ + if (o2hb_pop_count(&o2hb_quorum_region_bitmap, + O2NM_MAX_REGIONS) > O2HB_PIN_CUT_OFF) + o2hb_region_unpin(NULL); } static int o2hb_check_slot(struct o2hb_region *reg, @@ -1042,6 +1082,9 @@ static int o2hb_thread(void *data) set_user_nice(current, -20); + /* Pin node */ + o2nm_depend_this_node(); + while (!kthread_should_stop() && !reg->hr_unclean_stop) { /* We track the time spent inside * o2hb_do_disk_heartbeat so that we avoid more than @@ -1091,6 +1134,9 @@ static int o2hb_thread(void *data) mlog_errno(ret); } + /* Unpin node */ + o2nm_undepend_this_node(); + mlog(ML_HEARTBEAT|ML_KTHREAD, "hb thread exiting\n"); return 0; @@ -1143,6 +1189,12 @@ static int o2hb_debug_open(struct inode *inode, struct file *file) reg->hr_last_timeout_start)); goto done; + case O2HB_DB_TYPE_REGION_PINNED: + reg = (struct o2hb_region *)db->db_data; + out += snprintf(buf + out, PAGE_SIZE - out, "%u\n", + !!reg->hr_item_pinned); + goto done; + default: goto done; } @@ -1316,6 +1368,8 @@ int o2hb_init(void) memset(o2hb_quorum_region_bitmap, 0, sizeof(o2hb_quorum_region_bitmap)); memset(o2hb_failed_region_bitmap, 0, sizeof(o2hb_failed_region_bitmap)); + o2hb_dependent_users = 0; + return o2hb_debug_init(); } @@ -1385,6 +1439,7 @@ static void o2hb_region_release(struct config_item *item) debugfs_remove(reg->hr_debug_livenodes); debugfs_remove(reg->hr_debug_regnum); debugfs_remove(reg->hr_debug_elapsed_time); + debugfs_remove(reg->hr_debug_pinned); debugfs_remove(reg->hr_debug_dir); spin_lock(&o2hb_live_lock); @@ -1949,6 +2004,18 @@ static int o2hb_debug_region_init(struct o2hb_region *reg, struct dentry *dir) goto bail; } + reg->hr_debug_pinned = + o2hb_debug_create(O2HB_DEBUG_REGION_PINNED, + reg->hr_debug_dir, + &(reg->hr_db_pinned), + sizeof(*(reg->hr_db_pinned)), + O2HB_DB_TYPE_REGION_PINNED, + 0, 0, reg); + if (!reg->hr_debug_pinned) { + mlog_errno(ret); + goto bail; + } + ret = 0; bail: return ret; @@ -1964,8 +2031,10 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g if (reg == NULL) return ERR_PTR(-ENOMEM); - if (strlen(name) > O2HB_MAX_REGION_NAME_LEN) - return ERR_PTR(-ENAMETOOLONG); + if (strlen(name) > O2HB_MAX_REGION_NAME_LEN) { + ret = -ENAMETOOLONG; + goto free; + } spin_lock(&o2hb_live_lock); reg->hr_region_num = 0; @@ -1974,7 +2043,8 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g O2NM_MAX_REGIONS); if (reg->hr_region_num >= O2NM_MAX_REGIONS) { spin_unlock(&o2hb_live_lock); - return ERR_PTR(-EFBIG); + ret = -EFBIG; + goto free; } set_bit(reg->hr_region_num, o2hb_region_bitmap); } @@ -1986,10 +2056,13 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g ret = o2hb_debug_region_init(reg, o2hb_debug_dir); if (ret) { config_item_put(®->hr_item); - return ERR_PTR(ret); + goto free; } return ®->hr_item; +free: + kfree(reg); + return ERR_PTR(ret); } static void o2hb_heartbeat_group_drop_item(struct config_group *group, @@ -1997,15 +2070,20 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group, { struct task_struct *hb_task; struct o2hb_region *reg = to_o2hb_region(item); + int quorum_region = 0; /* stop the thread when the user removes the region dir */ spin_lock(&o2hb_live_lock); if (o2hb_global_heartbeat_active()) { clear_bit(reg->hr_region_num, o2hb_region_bitmap); clear_bit(reg->hr_region_num, o2hb_live_region_bitmap); + if (test_bit(reg->hr_region_num, o2hb_quorum_region_bitmap)) + quorum_region = 1; + clear_bit(reg->hr_region_num, o2hb_quorum_region_bitmap); } hb_task = reg->hr_task; reg->hr_task = NULL; + reg->hr_item_dropped = 1; spin_unlock(&o2hb_live_lock); if (hb_task) @@ -2023,7 +2101,27 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group, if (o2hb_global_heartbeat_active()) printk(KERN_NOTICE "o2hb: Heartbeat stopped on region %s\n", config_item_name(®->hr_item)); + config_item_put(item); + + if (!o2hb_global_heartbeat_active() || !quorum_region) + return; + + /* + * If global heartbeat active and there are dependent users, + * pin all regions if quorum region count <= CUT_OFF + */ + spin_lock(&o2hb_live_lock); + + if (!o2hb_dependent_users) + goto unlock; + + if (o2hb_pop_count(&o2hb_quorum_region_bitmap, + O2NM_MAX_REGIONS) <= O2HB_PIN_CUT_OFF) + o2hb_region_pin(NULL); + +unlock: + spin_unlock(&o2hb_live_lock); } struct o2hb_heartbeat_group_attribute { @@ -2209,63 +2307,138 @@ void o2hb_setup_callback(struct o2hb_callback_func *hc, } EXPORT_SYMBOL_GPL(o2hb_setup_callback); -static struct o2hb_region *o2hb_find_region(const char *region_uuid) +/* + * In local heartbeat mode, region_uuid passed matches the dlm domain name. + * In global heartbeat mode, region_uuid passed is NULL. + * + * In local, we only pin the matching region. In global we pin all the active + * regions. + */ +static int o2hb_region_pin(const char *region_uuid) { - struct o2hb_region *p, *reg = NULL; + int ret = 0, found = 0; + struct o2hb_region *reg; + char *uuid; assert_spin_locked(&o2hb_live_lock); - list_for_each_entry(p, &o2hb_all_regions, hr_all_item) { - if (!strcmp(region_uuid, config_item_name(&p->hr_item))) { - reg = p; - break; + list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) { + uuid = config_item_name(®->hr_item); + + /* local heartbeat */ + if (region_uuid) { + if (strcmp(region_uuid, uuid)) + continue; + found = 1; } + + if (reg->hr_item_pinned || reg->hr_item_dropped) + goto skip_pin; + + /* Ignore ENOENT only for local hb (userdlm domain) */ + ret = o2nm_depend_item(®->hr_item); + if (!ret) { + mlog(ML_CLUSTER, "Pin region %s\n", uuid); + reg->hr_item_pinned = 1; + } else { + if (ret == -ENOENT && found) + ret = 0; + else { + mlog(ML_ERROR, "Pin region %s fails with %d\n", + uuid, ret); + break; + } + } +skip_pin: + if (found) + break; } - return reg; + return ret; } -static int o2hb_region_get(const char *region_uuid) +/* + * In local heartbeat mode, region_uuid passed matches the dlm domain name. + * In global heartbeat mode, region_uuid passed is NULL. + * + * In local, we only unpin the matching region. In global we unpin all the + * active regions. + */ +static void o2hb_region_unpin(const char *region_uuid) { - int ret = 0; struct o2hb_region *reg; + char *uuid; + int found = 0; - spin_lock(&o2hb_live_lock); + assert_spin_locked(&o2hb_live_lock); - reg = o2hb_find_region(region_uuid); - if (!reg) - ret = -ENOENT; - spin_unlock(&o2hb_live_lock); + list_for_each_entry(reg, &o2hb_all_regions, hr_all_item) { + uuid = config_item_name(®->hr_item); + if (region_uuid) { + if (strcmp(region_uuid, uuid)) + continue; + found = 1; + } - if (ret) - goto out; + if (reg->hr_item_pinned) { + mlog(ML_CLUSTER, "Unpin region %s\n", uuid); + o2nm_undepend_item(®->hr_item); + reg->hr_item_pinned = 0; + } + if (found) + break; + } +} - ret = o2nm_depend_this_node(); - if (ret) - goto out; +static int o2hb_region_inc_user(const char *region_uuid) +{ + int ret = 0; - ret = o2nm_depend_item(®->hr_item); - if (ret) - o2nm_undepend_this_node(); + spin_lock(&o2hb_live_lock); -out: + /* local heartbeat */ + if (!o2hb_global_heartbeat_active()) { + ret = o2hb_region_pin(region_uuid); + goto unlock; + } + + /* + * if global heartbeat active and this is the first dependent user, + * pin all regions if quorum region count <= CUT_OFF + */ + o2hb_dependent_users++; + if (o2hb_dependent_users > 1) + goto unlock; + + if (o2hb_pop_count(&o2hb_quorum_region_bitmap, + O2NM_MAX_REGIONS) <= O2HB_PIN_CUT_OFF) + ret = o2hb_region_pin(NULL); + +unlock: + spin_unlock(&o2hb_live_lock); return ret; } -static void o2hb_region_put(const char *region_uuid) +void o2hb_region_dec_user(const char *region_uuid) { - struct o2hb_region *reg; - spin_lock(&o2hb_live_lock); - reg = o2hb_find_region(region_uuid); + /* local heartbeat */ + if (!o2hb_global_heartbeat_active()) { + o2hb_region_unpin(region_uuid); + goto unlock; + } - spin_unlock(&o2hb_live_lock); + /* + * if global heartbeat active and there are no dependent users, + * unpin all quorum regions + */ + o2hb_dependent_users--; + if (!o2hb_dependent_users) + o2hb_region_unpin(NULL); - if (reg) { - o2nm_undepend_item(®->hr_item); - o2nm_undepend_this_node(); - } +unlock: + spin_unlock(&o2hb_live_lock); } int o2hb_register_callback(const char *region_uuid, @@ -2286,9 +2459,11 @@ int o2hb_register_callback(const char *region_uuid, } if (region_uuid) { - ret = o2hb_region_get(region_uuid); - if (ret) + ret = o2hb_region_inc_user(region_uuid); + if (ret) { + mlog_errno(ret); goto out; + } } down_write(&o2hb_callback_sem); @@ -2306,7 +2481,7 @@ int o2hb_register_callback(const char *region_uuid, up_write(&o2hb_callback_sem); ret = 0; out: - mlog(ML_HEARTBEAT, "returning %d on behalf of %p for funcs %p\n", + mlog(ML_CLUSTER, "returning %d on behalf of %p for funcs %p\n", ret, __builtin_return_address(0), hc); return ret; } @@ -2317,7 +2492,7 @@ void o2hb_unregister_callback(const char *region_uuid, { BUG_ON(hc->hc_magic != O2HB_CB_MAGIC); - mlog(ML_HEARTBEAT, "on behalf of %p for funcs %p\n", + mlog(ML_CLUSTER, "on behalf of %p for funcs %p\n", __builtin_return_address(0), hc); /* XXX Can this happen _with_ a region reference? */ @@ -2325,7 +2500,7 @@ void o2hb_unregister_callback(const char *region_uuid, return; if (region_uuid) - o2hb_region_put(region_uuid); + o2hb_region_dec_user(region_uuid); down_write(&o2hb_callback_sem); diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c index c7fba39..6c61771 100644 --- a/fs/ocfs2/cluster/masklog.c +++ b/fs/ocfs2/cluster/masklog.c @@ -113,10 +113,11 @@ static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = { define_mask(QUOTA), define_mask(REFCOUNT), define_mask(BASTS), + define_mask(RESERVATIONS), + define_mask(CLUSTER), define_mask(ERROR), define_mask(NOTICE), define_mask(KTHREAD), - define_mask(RESERVATIONS), }; static struct attribute *mlog_attr_ptrs[MLOG_MAX_BITS] = {NULL, }; diff --git a/fs/ocfs2/cluster/masklog.h b/fs/ocfs2/cluster/masklog.h index ea2ed9f..34d6544 100644 --- a/fs/ocfs2/cluster/masklog.h +++ b/fs/ocfs2/cluster/masklog.h @@ -81,7 +81,7 @@ #include <linux/sched.h> /* bits that are frequently given and infrequently matched in the low word */ -/* NOTE: If you add a flag, you need to also update mlog.c! */ +/* NOTE: If you add a flag, you need to also update masklog.c! */ #define ML_ENTRY 0x0000000000000001ULL /* func call entry */ #define ML_EXIT 0x0000000000000002ULL /* func call exit */ #define ML_TCP 0x0000000000000004ULL /* net cluster/tcp.c */ @@ -114,13 +114,14 @@ #define ML_XATTR 0x0000000020000000ULL /* ocfs2 extended attributes */ #define ML_QUOTA 0x0000000040000000ULL /* ocfs2 quota operations */ #define ML_REFCOUNT 0x0000000080000000ULL /* refcount tree operations */ -#define ML_BASTS 0x0000001000000000ULL /* dlmglue asts and basts */ +#define ML_BASTS 0x0000000100000000ULL /* dlmglue asts and basts */ +#define ML_RESERVATIONS 0x0000000200000000ULL /* ocfs2 alloc reservations */ +#define ML_CLUSTER 0x0000000400000000ULL /* cluster stack */ + /* bits that are infrequently given and frequently matched in the high word */ -#define ML_ERROR 0x0000000100000000ULL /* sent to KERN_ERR */ -#define ML_NOTICE 0x0000000200000000ULL /* setn to KERN_NOTICE */ -#define ML_KTHREAD 0x0000000400000000ULL /* kernel thread activity */ -#define ML_RESERVATIONS 0x0000000800000000ULL /* ocfs2 alloc reservations */ -#define ML_CLUSTER 0x0000001000000000ULL /* cluster stack */ +#define ML_ERROR 0x1000000000000000ULL /* sent to KERN_ERR */ +#define ML_NOTICE 0x2000000000000000ULL /* setn to KERN_NOTICE */ +#define ML_KTHREAD 0x4000000000000000ULL /* kernel thread activity */ #define MLOG_INITIAL_AND_MASK (ML_ERROR|ML_NOTICE) #define MLOG_INITIAL_NOT_MASK (ML_ENTRY|ML_EXIT) diff --git a/fs/ocfs2/cluster/netdebug.c b/fs/ocfs2/cluster/netdebug.c index a3f150e..3a583590 100644 --- a/fs/ocfs2/cluster/netdebug.c +++ b/fs/ocfs2/cluster/netdebug.c @@ -46,10 +46,15 @@ #define O2NET_DEBUG_DIR "o2net" #define SC_DEBUG_NAME "sock_containers" #define NST_DEBUG_NAME "send_tracking" +#define STATS_DEBUG_NAME "stats" + +#define SHOW_SOCK_CONTAINERS 0 +#define SHOW_SOCK_STATS 1 static struct dentry *o2net_dentry; static struct dentry *sc_dentry; static struct dentry *nst_dentry; +static struct dentry *stats_dentry; static DEFINE_SPINLOCK(o2net_debug_lock); @@ -123,37 +128,42 @@ static void *nst_seq_next(struct seq_file *seq, void *v, loff_t *pos) static int nst_seq_show(struct seq_file *seq, void *v) { struct o2net_send_tracking *nst, *dummy_nst = seq->private; + ktime_t now; + s64 sock, send, status; spin_lock(&o2net_debug_lock); nst = next_nst(dummy_nst); + if (!nst) + goto out; - if (nst != NULL) { - /* get_task_comm isn't exported. oh well. */ - seq_printf(seq, "%p:\n" - " pid: %lu\n" - " tgid: %lu\n" - " process name: %s\n" - " node: %u\n" - " sc: %p\n" - " message id: %d\n" - " message type: %u\n" - " message key: 0x%08x\n" - " sock acquiry: %lu.%ld\n" - " send start: %lu.%ld\n" - " wait start: %lu.%ld\n", - nst, (unsigned long)nst->st_task->pid, - (unsigned long)nst->st_task->tgid, - nst->st_task->comm, nst->st_node, - nst->st_sc, nst->st_id, nst->st_msg_type, - nst->st_msg_key, - nst->st_sock_time.tv_sec, - (long)nst->st_sock_time.tv_usec, - nst->st_send_time.tv_sec, - (long)nst->st_send_time.tv_usec, - nst->st_status_time.tv_sec, - (long)nst->st_status_time.tv_usec); - } + now = ktime_get(); + sock = ktime_to_us(ktime_sub(now, nst->st_sock_time)); + send = ktime_to_us(ktime_sub(now, nst->st_send_time)); + status = ktime_to_us(ktime_sub(now, nst->st_status_time)); + + /* get_task_comm isn't exported. oh well. */ + seq_printf(seq, "%p:\n" + " pid: %lu\n" + " tgid: %lu\n" + " process name: %s\n" + " node: %u\n" + " sc: %p\n" + " message id: %d\n" + " message type: %u\n" + " message key: 0x%08x\n" + " sock acquiry: %lld usecs ago\n" + " send start: %lld usecs ago\n" + " wait start: %lld usecs ago\n", + nst, (unsigned long)task_pid_nr(nst->st_task), + (unsigned long)nst->st_task->tgid, + nst->st_task->comm, nst->st_node, + nst->st_sc, nst->st_id, nst->st_msg_type, + nst->st_msg_key, + (long long)sock, + (long long)send, + (long long)status); +out: spin_unlock(&o2net_debug_lock); return 0; @@ -228,6 +238,11 @@ void o2net_debug_del_sc(struct o2net_sock_container *sc) spin_unlock(&o2net_debug_lock); } +struct o2net_sock_debug { + int dbg_ctxt; + struct o2net_sock_container *dbg_sock; +}; + static struct o2net_sock_container *next_sc(struct o2net_sock_container *sc_start) { @@ -253,7 +268,8 @@ static struct o2net_sock_container static void *sc_seq_start(struct seq_file *seq, loff_t *pos) { - struct o2net_sock_container *sc, *dummy_sc = seq->private; + struct o2net_sock_debug *sd = seq->private; + struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock; spin_lock(&o2net_debug_lock); sc = next_sc(dummy_sc); @@ -264,7 +280,8 @@ static void *sc_seq_start(struct seq_file *seq, loff_t *pos) static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos) { - struct o2net_sock_container *sc, *dummy_sc = seq->private; + struct o2net_sock_debug *sd = seq->private; + struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock; spin_lock(&o2net_debug_lock); sc = next_sc(dummy_sc); @@ -276,65 +293,107 @@ static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos) return sc; /* unused, just needs to be null when done */ } -#define TV_SEC_USEC(TV) TV.tv_sec, (long)TV.tv_usec +#ifdef CONFIG_OCFS2_FS_STATS +# define sc_send_count(_s) ((_s)->sc_send_count) +# define sc_recv_count(_s) ((_s)->sc_recv_count) +# define sc_tv_acquiry_total_ns(_s) (ktime_to_ns((_s)->sc_tv_acquiry_total)) +# define sc_tv_send_total_ns(_s) (ktime_to_ns((_s)->sc_tv_send_total)) +# define sc_tv_status_total_ns(_s) (ktime_to_ns((_s)->sc_tv_status_total)) +# define sc_tv_process_total_ns(_s) (ktime_to_ns((_s)->sc_tv_process_total)) +#else +# define sc_send_count(_s) (0U) +# define sc_recv_count(_s) (0U) +# define sc_tv_acquiry_total_ns(_s) (0LL) +# define sc_tv_send_total_ns(_s) (0LL) +# define sc_tv_status_total_ns(_s) (0LL) +# define sc_tv_process_total_ns(_s) (0LL) +#endif + +/* So that debugfs.ocfs2 can determine which format is being used */ +#define O2NET_STATS_STR_VERSION 1 +static void sc_show_sock_stats(struct seq_file *seq, + struct o2net_sock_container *sc) +{ + if (!sc) + return; + + seq_printf(seq, "%d,%u,%lu,%lld,%lld,%lld,%lu,%lld\n", O2NET_STATS_STR_VERSION, + sc->sc_node->nd_num, (unsigned long)sc_send_count(sc), + (long long)sc_tv_acquiry_total_ns(sc), + (long long)sc_tv_send_total_ns(sc), + (long long)sc_tv_status_total_ns(sc), + (unsigned long)sc_recv_count(sc), + (long long)sc_tv_process_total_ns(sc)); +} + +static void sc_show_sock_container(struct seq_file *seq, + struct o2net_sock_container *sc) +{ + struct inet_sock *inet = NULL; + __be32 saddr = 0, daddr = 0; + __be16 sport = 0, dport = 0; + + if (!sc) + return; + + if (sc->sc_sock) { + inet = inet_sk(sc->sc_sock->sk); + /* the stack's structs aren't sparse endian clean */ + saddr = (__force __be32)inet->inet_saddr; + daddr = (__force __be32)inet->inet_daddr; + sport = (__force __be16)inet->inet_sport; + dport = (__force __be16)inet->inet_dport; + } + + /* XXX sigh, inet-> doesn't have sparse annotation so any + * use of it here generates a warning with -Wbitwise */ + seq_printf(seq, "%p:\n" + " krefs: %d\n" + " sock: %pI4:%u -> " + "%pI4:%u\n" + " remote node: %s\n" + " page off: %zu\n" + " handshake ok: %u\n" + " timer: %lld usecs\n" + " data ready: %lld usecs\n" + " advance start: %lld usecs\n" + " advance stop: %lld usecs\n" + " func start: %lld usecs\n" + " func stop: %lld usecs\n" + " func key: 0x%08x\n" + " func type: %u\n", + sc, + atomic_read(&sc->sc_kref.refcount), + &saddr, inet ? ntohs(sport) : 0, + &daddr, inet ? ntohs(dport) : 0, + sc->sc_node->nd_name, + sc->sc_page_off, + sc->sc_handshake_ok, + (long long)ktime_to_us(sc->sc_tv_timer), + (long long)ktime_to_us(sc->sc_tv_data_ready), + (long long)ktime_to_us(sc->sc_tv_advance_start), + (long long)ktime_to_us(sc->sc_tv_advance_stop), + (long long)ktime_to_us(sc->sc_tv_func_start), + (long long)ktime_to_us(sc->sc_tv_func_stop), + sc->sc_msg_key, + sc->sc_msg_type); +} static int sc_seq_show(struct seq_file *seq, void *v) { - struct o2net_sock_container *sc, *dummy_sc = seq->private; + struct o2net_sock_debug *sd = seq->private; + struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock; spin_lock(&o2net_debug_lock); sc = next_sc(dummy_sc); - if (sc != NULL) { - struct inet_sock *inet = NULL; - - __be32 saddr = 0, daddr = 0; - __be16 sport = 0, dport = 0; - - if (sc->sc_sock) { - inet = inet_sk(sc->sc_sock->sk); - /* the stack's structs aren't sparse endian clean */ - saddr = (__force __be32)inet->inet_saddr; - daddr = (__force __be32)inet->inet_daddr; - sport = (__force __be16)inet->inet_sport; - dport = (__force __be16)inet->inet_dport; - } - - /* XXX sigh, inet-> doesn't have sparse annotation so any - * use of it here generates a warning with -Wbitwise */ - seq_printf(seq, "%p:\n" - " krefs: %d\n" - " sock: %pI4:%u -> " - "%pI4:%u\n" - " remote node: %s\n" - " page off: %zu\n" - " handshake ok: %u\n" - " timer: %lu.%ld\n" - " data ready: %lu.%ld\n" - " advance start: %lu.%ld\n" - " advance stop: %lu.%ld\n" - " func start: %lu.%ld\n" - " func stop: %lu.%ld\n" - " func key: %u\n" - " func type: %u\n", - sc, - atomic_read(&sc->sc_kref.refcount), - &saddr, inet ? ntohs(sport) : 0, - &daddr, inet ? ntohs(dport) : 0, - sc->sc_node->nd_name, - sc->sc_page_off, - sc->sc_handshake_ok, - TV_SEC_USEC(sc->sc_tv_timer), - TV_SEC_USEC(sc->sc_tv_data_ready), - TV_SEC_USEC(sc->sc_tv_advance_start), - TV_SEC_USEC(sc->sc_tv_advance_stop), - TV_SEC_USEC(sc->sc_tv_func_start), - TV_SEC_USEC(sc->sc_tv_func_stop), - sc->sc_msg_key, - sc->sc_msg_type); + if (sc) { + if (sd->dbg_ctxt == SHOW_SOCK_CONTAINERS) + sc_show_sock_container(seq, sc); + else + sc_show_sock_stats(seq, sc); } - spin_unlock(&o2net_debug_lock); return 0; @@ -351,7 +410,7 @@ static const struct seq_operations sc_seq_ops = { .show = sc_seq_show, }; -static int sc_fop_open(struct inode *inode, struct file *file) +static int sc_common_open(struct file *file, struct o2net_sock_debug *sd) { struct o2net_sock_container *dummy_sc; struct seq_file *seq; @@ -369,7 +428,8 @@ static int sc_fop_open(struct inode *inode, struct file *file) goto out; seq = file->private_data; - seq->private = dummy_sc; + seq->private = sd; + sd->dbg_sock = dummy_sc; o2net_debug_add_sc(dummy_sc); dummy_sc = NULL; @@ -382,12 +442,48 @@ out: static int sc_fop_release(struct inode *inode, struct file *file) { struct seq_file *seq = file->private_data; - struct o2net_sock_container *dummy_sc = seq->private; + struct o2net_sock_debug *sd = seq->private; + struct o2net_sock_container *dummy_sc = sd->dbg_sock; o2net_debug_del_sc(dummy_sc); return seq_release_private(inode, file); } +static int stats_fop_open(struct inode *inode, struct file *file) +{ + struct o2net_sock_debug *sd; + + sd = kmalloc(sizeof(struct o2net_sock_debug), GFP_KERNEL); + if (sd == NULL) + return -ENOMEM; + + sd->dbg_ctxt = SHOW_SOCK_STATS; + sd->dbg_sock = NULL; + + return sc_common_open(file, sd); +} + +static const struct file_operations stats_seq_fops = { + .open = stats_fop_open, + .read = seq_read, + .llseek = seq_lseek, + .release = sc_fop_release, +}; + +static int sc_fop_open(struct inode *inode, struct file *file) +{ + struct o2net_sock_debug *sd; + + sd = kmalloc(sizeof(struct o2net_sock_debug), GFP_KERNEL); + if (sd == NULL) + return -ENOMEM; + + sd->dbg_ctxt = SHOW_SOCK_CONTAINERS; + sd->dbg_sock = NULL; + + return sc_common_open(file, sd); +} + static const struct file_operations sc_seq_fops = { .open = sc_fop_open, .read = seq_read, @@ -419,25 +515,29 @@ int o2net_debugfs_init(void) goto bail; } + stats_dentry = debugfs_create_file(STATS_DEBUG_NAME, S_IFREG|S_IRUSR, + o2net_dentry, NULL, + &stats_seq_fops); + if (!stats_dentry) { + mlog_errno(-ENOMEM); + goto bail; + } + return 0; bail: - if (sc_dentry) - debugfs_remove(sc_dentry); - if (nst_dentry) - debugfs_remove(nst_dentry); - if (o2net_dentry) - debugfs_remove(o2net_dentry); + debugfs_remove(stats_dentry); + debugfs_remove(sc_dentry); + debugfs_remove(nst_dentry); + debugfs_remove(o2net_dentry); return -ENOMEM; } void o2net_debugfs_exit(void) { - if (sc_dentry) - debugfs_remove(sc_dentry); - if (nst_dentry) - debugfs_remove(nst_dentry); - if (o2net_dentry) - debugfs_remove(o2net_dentry); + debugfs_remove(stats_dentry); + debugfs_remove(sc_dentry); + debugfs_remove(nst_dentry); + debugfs_remove(o2net_dentry); } #endif /* CONFIG_DEBUG_FS */ diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c index cf3e166..a873667 100644 --- a/fs/ocfs2/cluster/quorum.c +++ b/fs/ocfs2/cluster/quorum.c @@ -325,5 +325,7 @@ void o2quo_init(void) void o2quo_exit(void) { - flush_scheduled_work(); + struct o2quo_state *qs = &o2quo_state; + + flush_work_sync(&qs->qs_work); } diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c index 9aa426e..3b11cb1 100644 --- a/fs/ocfs2/cluster/tcp.c +++ b/fs/ocfs2/cluster/tcp.c @@ -153,63 +153,114 @@ static void o2net_init_nst(struct o2net_send_tracking *nst, u32 msgtype, nst->st_node = node; } -static void o2net_set_nst_sock_time(struct o2net_send_tracking *nst) +static inline void o2net_set_nst_sock_time(struct o2net_send_tracking *nst) { - do_gettimeofday(&nst->st_sock_time); + nst->st_sock_time = ktime_get(); } -static void o2net_set_nst_send_time(struct o2net_send_tracking *nst) +static inline void o2net_set_nst_send_time(struct o2net_send_tracking *nst) { - do_gettimeofday(&nst->st_send_time); + nst->st_send_time = ktime_get(); } -static void o2net_set_nst_status_time(struct o2net_send_tracking *nst) +static inline void o2net_set_nst_status_time(struct o2net_send_tracking *nst) { - do_gettimeofday(&nst->st_status_time); + nst->st_status_time = ktime_get(); } -static void o2net_set_nst_sock_container(struct o2net_send_tracking *nst, - struct o2net_sock_container *sc) +static inline void o2net_set_nst_sock_container(struct o2net_send_tracking *nst, + struct o2net_sock_container *sc) { nst->st_sc = sc; } -static void o2net_set_nst_msg_id(struct o2net_send_tracking *nst, u32 msg_id) +static inline void o2net_set_nst_msg_id(struct o2net_send_tracking *nst, + u32 msg_id) { nst->st_id = msg_id; } -#else /* CONFIG_DEBUG_FS */ - -static inline void o2net_init_nst(struct o2net_send_tracking *nst, u32 msgtype, - u32 msgkey, struct task_struct *task, u8 node) +static inline void o2net_set_sock_timer(struct o2net_sock_container *sc) { + sc->sc_tv_timer = ktime_get(); } -static inline void o2net_set_nst_sock_time(struct o2net_send_tracking *nst) +static inline void o2net_set_data_ready_time(struct o2net_sock_container *sc) { + sc->sc_tv_data_ready = ktime_get(); } -static inline void o2net_set_nst_send_time(struct o2net_send_tracking *nst) +static inline void o2net_set_advance_start_time(struct o2net_sock_container *sc) { + sc->sc_tv_advance_start = ktime_get(); } -static inline void o2net_set_nst_status_time(struct o2net_send_tracking *nst) +static inline void o2net_set_advance_stop_time(struct o2net_sock_container *sc) { + sc->sc_tv_advance_stop = ktime_get(); } -static inline void o2net_set_nst_sock_container(struct o2net_send_tracking *nst, - struct o2net_sock_container *sc) +static inline void o2net_set_func_start_time(struct o2net_sock_container *sc) { + sc->sc_tv_func_start = ktime_get(); } -static inline void o2net_set_nst_msg_id(struct o2net_send_tracking *nst, - u32 msg_id) +static inline void o2net_set_func_stop_time(struct o2net_sock_container *sc) { + sc->sc_tv_func_stop = ktime_get(); } +static ktime_t o2net_get_func_run_time(struct o2net_sock_container *sc) +{ + return ktime_sub(sc->sc_tv_func_stop, sc->sc_tv_func_start); +} +#else /* CONFIG_DEBUG_FS */ +# define o2net_init_nst(a, b, c, d, e) +# define o2net_set_nst_sock_time(a) +# define o2net_set_nst_send_time(a) +# define o2net_set_nst_status_time(a) +# define o2net_set_nst_sock_container(a, b) +# define o2net_set_nst_msg_id(a, b) +# define o2net_set_sock_timer(a) +# define o2net_set_data_ready_time(a) +# define o2net_set_advance_start_time(a) +# define o2net_set_advance_stop_time(a) +# define o2net_set_func_start_time(a) +# define o2net_set_func_stop_time(a) +# define o2net_get_func_run_time(a) (ktime_t)0 #endif /* CONFIG_DEBUG_FS */ +#ifdef CONFIG_OCFS2_FS_STATS +static void o2net_update_send_stats(struct o2net_send_tracking *nst, + struct o2net_sock_container *sc) +{ + sc->sc_tv_status_total = ktime_add(sc->sc_tv_status_total, + ktime_sub(ktime_get(), + nst->st_status_time)); + sc->sc_tv_send_total = ktime_add(sc->sc_tv_send_total, + ktime_sub(nst->st_status_time, + nst->st_send_time)); + sc->sc_tv_acquiry_total = ktime_add(sc->sc_tv_acquiry_total, + ktime_sub(nst->st_send_time, + nst->st_sock_time)); + sc->sc_send_count++; +} + +static void o2net_update_recv_stats(struct o2net_sock_container *sc) +{ + sc->sc_tv_process_total = ktime_add(sc->sc_tv_process_total, + o2net_get_func_run_time(sc)); + sc->sc_recv_count++; +} + +#else + +# define o2net_update_send_stats(a, b) + +# define o2net_update_recv_stats(sc) + +#endif /* CONFIG_OCFS2_FS_STATS */ + static inline int o2net_reconnect_delay(void) { return o2nm_single_cluster->cl_reconnect_delay_ms; @@ -355,6 +406,7 @@ static void sc_kref_release(struct kref *kref) sc->sc_sock = NULL; } + o2nm_undepend_item(&sc->sc_node->nd_item); o2nm_node_put(sc->sc_node); sc->sc_node = NULL; @@ -376,6 +428,7 @@ static struct o2net_sock_container *sc_alloc(struct o2nm_node *node) { struct o2net_sock_container *sc, *ret = NULL; struct page *page = NULL; + int status = 0; page = alloc_page(GFP_NOFS); sc = kzalloc(sizeof(*sc), GFP_NOFS); @@ -386,6 +439,13 @@ static struct o2net_sock_container *sc_alloc(struct o2nm_node *node) o2nm_node_get(node); sc->sc_node = node; + /* pin the node item of the remote node */ + status = o2nm_depend_item(&node->nd_item); + if (status) { + mlog_errno(status); + o2nm_node_put(node); + goto out; + } INIT_WORK(&sc->sc_connect_work, o2net_sc_connect_completed); INIT_WORK(&sc->sc_rx_work, o2net_rx_until_empty); INIT_WORK(&sc->sc_shutdown_work, o2net_shutdown_sc); @@ -546,7 +606,7 @@ static void o2net_data_ready(struct sock *sk, int bytes) if (sk->sk_user_data) { struct o2net_sock_container *sc = sk->sk_user_data; sclog(sc, "data_ready hit\n"); - do_gettimeofday(&sc->sc_tv_data_ready); + o2net_set_data_ready_time(sc); o2net_sc_queue_work(sc, &sc->sc_rx_work); ready = sc->sc_data_ready; } else { @@ -1070,6 +1130,8 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec, o2net_set_nst_status_time(&nst); wait_event(nsw.ns_wq, o2net_nsw_completed(nn, &nsw)); + o2net_update_send_stats(&nst, sc); + /* Note that we avoid overwriting the callers status return * variable if a system error was reported on the other * side. Callers beware. */ @@ -1183,13 +1245,15 @@ static int o2net_process_message(struct o2net_sock_container *sc, if (syserr != O2NET_ERR_NONE) goto out_respond; - do_gettimeofday(&sc->sc_tv_func_start); + o2net_set_func_start_time(sc); sc->sc_msg_key = be32_to_cpu(hdr->key); sc->sc_msg_type = be16_to_cpu(hdr->msg_type); handler_status = (nmh->nh_func)(hdr, sizeof(struct o2net_msg) + be16_to_cpu(hdr->data_len), nmh->nh_func_data, &ret_data); - do_gettimeofday(&sc->sc_tv_func_stop); + o2net_set_func_stop_time(sc); + + o2net_update_recv_stats(sc); out_respond: /* this destroys the hdr, so don't use it after this */ @@ -1300,7 +1364,7 @@ static int o2net_advance_rx(struct o2net_sock_container *sc) size_t datalen; sclog(sc, "receiving\n"); - do_gettimeofday(&sc->sc_tv_advance_start); + o2net_set_advance_start_time(sc); if (unlikely(sc->sc_handshake_ok == 0)) { if(sc->sc_page_off < sizeof(struct o2net_handshake)) { @@ -1375,7 +1439,7 @@ static int o2net_advance_rx(struct o2net_sock_container *sc) out: sclog(sc, "ret = %d\n", ret); - do_gettimeofday(&sc->sc_tv_advance_stop); + o2net_set_advance_stop_time(sc); return ret; } @@ -1475,27 +1539,28 @@ static void o2net_idle_timer(unsigned long data) { struct o2net_sock_container *sc = (struct o2net_sock_container *)data; struct o2net_node *nn = o2net_nn_from_num(sc->sc_node->nd_num); - struct timeval now; - do_gettimeofday(&now); +#ifdef CONFIG_DEBUG_FS + ktime_t now = ktime_get(); +#endif printk(KERN_NOTICE "o2net: connection to " SC_NODEF_FMT " has been idle for %u.%u " "seconds, shutting it down.\n", SC_NODEF_ARGS(sc), o2net_idle_timeout() / 1000, o2net_idle_timeout() % 1000); - mlog(ML_NOTICE, "here are some times that might help debug the " - "situation: (tmr %ld.%ld now %ld.%ld dr %ld.%ld adv " - "%ld.%ld:%ld.%ld func (%08x:%u) %ld.%ld:%ld.%ld)\n", - sc->sc_tv_timer.tv_sec, (long) sc->sc_tv_timer.tv_usec, - now.tv_sec, (long) now.tv_usec, - sc->sc_tv_data_ready.tv_sec, (long) sc->sc_tv_data_ready.tv_usec, - sc->sc_tv_advance_start.tv_sec, - (long) sc->sc_tv_advance_start.tv_usec, - sc->sc_tv_advance_stop.tv_sec, - (long) sc->sc_tv_advance_stop.tv_usec, + +#ifdef CONFIG_DEBUG_FS + mlog(ML_NOTICE, "Here are some times that might help debug the " + "situation: (Timer: %lld, Now %lld, DataReady %lld, Advance %lld-%lld, " + "Key 0x%08x, Func %u, FuncTime %lld-%lld)\n", + (long long)ktime_to_us(sc->sc_tv_timer), (long long)ktime_to_us(now), + (long long)ktime_to_us(sc->sc_tv_data_ready), + (long long)ktime_to_us(sc->sc_tv_advance_start), + (long long)ktime_to_us(sc->sc_tv_advance_stop), sc->sc_msg_key, sc->sc_msg_type, - sc->sc_tv_func_start.tv_sec, (long) sc->sc_tv_func_start.tv_usec, - sc->sc_tv_func_stop.tv_sec, (long) sc->sc_tv_func_stop.tv_usec); + (long long)ktime_to_us(sc->sc_tv_func_start), + (long long)ktime_to_us(sc->sc_tv_func_stop)); +#endif /* * Initialize the nn_timeout so that the next connection attempt @@ -1511,7 +1576,7 @@ static void o2net_sc_reset_idle_timer(struct o2net_sock_container *sc) o2net_sc_cancel_delayed_work(sc, &sc->sc_keepalive_work); o2net_sc_queue_delayed_work(sc, &sc->sc_keepalive_work, msecs_to_jiffies(o2net_keepalive_delay())); - do_gettimeofday(&sc->sc_tv_timer); + o2net_set_sock_timer(sc); mod_timer(&sc->sc_idle_timeout, jiffies + msecs_to_jiffies(o2net_idle_timeout())); } diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h index 15fdbdf..4cbcb65 100644 --- a/fs/ocfs2/cluster/tcp_internal.h +++ b/fs/ocfs2/cluster/tcp_internal.h @@ -166,18 +166,27 @@ struct o2net_sock_container { /* original handlers for the sockets */ void (*sc_state_change)(struct sock *sk); void (*sc_data_ready)(struct sock *sk, int bytes); -#ifdef CONFIG_DEBUG_FS - struct list_head sc_net_debug_item; -#endif - struct timeval sc_tv_timer; - struct timeval sc_tv_data_ready; - struct timeval sc_tv_advance_start; - struct timeval sc_tv_advance_stop; - struct timeval sc_tv_func_start; - struct timeval sc_tv_func_stop; + u32 sc_msg_key; u16 sc_msg_type; +#ifdef CONFIG_DEBUG_FS + struct list_head sc_net_debug_item; + ktime_t sc_tv_timer; + ktime_t sc_tv_data_ready; + ktime_t sc_tv_advance_start; + ktime_t sc_tv_advance_stop; + ktime_t sc_tv_func_start; + ktime_t sc_tv_func_stop; +#endif +#ifdef CONFIG_OCFS2_FS_STATS + ktime_t sc_tv_acquiry_total; + ktime_t sc_tv_send_total; + ktime_t sc_tv_status_total; + u32 sc_send_count; + u32 sc_recv_count; + ktime_t sc_tv_process_total; +#endif struct mutex sc_send_lock; }; @@ -220,9 +229,9 @@ struct o2net_send_tracking { u32 st_msg_type; u32 st_msg_key; u8 st_node; - struct timeval st_sock_time; - struct timeval st_send_time; - struct timeval st_status_time; + ktime_t st_sock_time; + ktime_t st_send_time; + ktime_t st_status_time; }; #else struct o2net_send_tracking { diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c index edaded4..6d80ecc 100644 --- a/fs/ocfs2/dcache.c +++ b/fs/ocfs2/dcache.c @@ -52,9 +52,15 @@ void ocfs2_dentry_attach_gen(struct dentry *dentry) static int ocfs2_dentry_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct inode *inode = dentry->d_inode; + struct inode *inode; int ret = 0; /* if all else fails, just return false */ - struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); + struct ocfs2_super *osb; + + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = dentry->d_inode; + osb = OCFS2_SB(dentry->d_sb); mlog_entry("(0x%p, '%.*s')\n", dentry, dentry->d_name.len, dentry->d_name.name); @@ -169,23 +175,25 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode, struct list_head *p; struct dentry *dentry = NULL; - spin_lock(&dcache_lock); - + spin_lock(&inode->i_lock); list_for_each(p, &inode->i_dentry) { dentry = list_entry(p, struct dentry, d_alias); + spin_lock(&dentry->d_lock); if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) { mlog(0, "dentry found: %.*s\n", dentry->d_name.len, dentry->d_name.name); - dget_locked(dentry); + dget_dlock(dentry); + spin_unlock(&dentry->d_lock); break; } + spin_unlock(&dentry->d_lock); dentry = NULL; } - spin_unlock(&dcache_lock); + spin_unlock(&inode->i_lock); return dentry; } @@ -476,7 +484,6 @@ static void ocfs2_dentry_iput(struct dentry *dentry, struct inode *inode) out: iput(inode); - ocfs2_dentry_attach_gen(dentry); } /* diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c index c49f6de..d417b3f 100644 --- a/fs/ocfs2/dir.c +++ b/fs/ocfs2/dir.c @@ -2461,8 +2461,10 @@ static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb, di->i_dx_root = cpu_to_le64(dr_blkno); + spin_lock(&OCFS2_I(dir)->ip_lock); OCFS2_I(dir)->ip_dyn_features |= OCFS2_INDEXED_DIR_FL; di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features); + spin_unlock(&OCFS2_I(dir)->ip_lock); ocfs2_journal_dirty(handle, di_bh); @@ -4466,8 +4468,10 @@ static int ocfs2_dx_dir_remove_index(struct inode *dir, goto out_commit; } + spin_lock(&OCFS2_I(dir)->ip_lock); OCFS2_I(dir)->ip_dyn_features &= ~OCFS2_INDEXED_DIR_FL; di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features); + spin_unlock(&OCFS2_I(dir)->ip_lock); di->i_dx_root = cpu_to_le64(0ULL); ocfs2_journal_dirty(handle, di_bh); diff --git a/fs/ocfs2/dlm/dlmast.c b/fs/ocfs2/dlm/dlmast.c index f449991..3a3ed4b 100644 --- a/fs/ocfs2/dlm/dlmast.c +++ b/fs/ocfs2/dlm/dlmast.c @@ -90,19 +90,29 @@ static int dlm_should_cancel_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock) void __dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock) { - mlog_entry_void(); + struct dlm_lock_resource *res; BUG_ON(!dlm); BUG_ON(!lock); + res = lock->lockres; + assert_spin_locked(&dlm->ast_lock); + if (!list_empty(&lock->ast_list)) { - mlog(ML_ERROR, "ast list not empty!! pending=%d, newlevel=%d\n", + mlog(ML_ERROR, "%s: res %.*s, lock %u:%llu, " + "AST list not empty, pending %d, newlevel %d\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), lock->ast_pending, lock->ml.type); BUG(); } if (lock->ast_pending) - mlog(0, "lock has an ast getting flushed right now\n"); + mlog(0, "%s: res %.*s, lock %u:%llu, AST getting flushed\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie))); /* putting lock on list, add a ref */ dlm_lock_get(lock); @@ -110,9 +120,10 @@ void __dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock) /* check to see if this ast obsoletes the bast */ if (dlm_should_cancel_bast(dlm, lock)) { - struct dlm_lock_resource *res = lock->lockres; - mlog(0, "%s: cancelling bast for %.*s\n", - dlm->name, res->lockname.len, res->lockname.name); + mlog(0, "%s: res %.*s, lock %u:%llu, Cancelling BAST\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie))); lock->bast_pending = 0; list_del_init(&lock->bast_list); lock->ml.highest_blocked = LKM_IVMODE; @@ -134,8 +145,6 @@ void __dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock) void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock) { - mlog_entry_void(); - BUG_ON(!dlm); BUG_ON(!lock); @@ -147,15 +156,21 @@ void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock) void __dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock) { - mlog_entry_void(); + struct dlm_lock_resource *res; BUG_ON(!dlm); BUG_ON(!lock); + assert_spin_locked(&dlm->ast_lock); + res = lock->lockres; + BUG_ON(!list_empty(&lock->bast_list)); if (lock->bast_pending) - mlog(0, "lock has a bast getting flushed right now\n"); + mlog(0, "%s: res %.*s, lock %u:%llu, BAST getting flushed\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie))); /* putting lock on list, add a ref */ dlm_lock_get(lock); @@ -167,8 +182,6 @@ void __dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock) void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock) { - mlog_entry_void(); - BUG_ON(!dlm); BUG_ON(!lock); @@ -213,7 +226,10 @@ void dlm_do_local_ast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, dlm_astlockfunc_t *fn; struct dlm_lockstatus *lksb; - mlog_entry_void(); + mlog(0, "%s: res %.*s, lock %u:%llu, Local AST\n", dlm->name, + res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie))); lksb = lock->lksb; fn = lock->ast; @@ -231,7 +247,10 @@ int dlm_do_remote_ast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, struct dlm_lockstatus *lksb; int lksbflags; - mlog_entry_void(); + mlog(0, "%s: res %.*s, lock %u:%llu, Remote AST\n", dlm->name, + res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie))); lksb = lock->lksb; BUG_ON(lock->ml.node == dlm->node_num); @@ -250,9 +269,14 @@ void dlm_do_local_bast(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, { dlm_bastlockfunc_t *fn = lock->bast; - mlog_entry_void(); BUG_ON(lock->ml.node != dlm->node_num); + mlog(0, "%s: res %.*s, lock %u:%llu, Local BAST, blocked %d\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), + blocked_type); + (*fn)(lock->astdata, blocked_type); } @@ -332,7 +356,8 @@ int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data, /* cannot get a proxy ast message if this node owns it */ BUG_ON(res->owner == dlm->node_num); - mlog(0, "lockres %.*s\n", res->lockname.len, res->lockname.name); + mlog(0, "%s: res %.*s\n", dlm->name, res->lockname.len, + res->lockname.name); spin_lock(&res->spinlock); if (res->state & DLM_LOCK_RES_RECOVERING) { @@ -382,8 +407,12 @@ do_ast: if (past->type == DLM_AST) { /* do not alter lock refcount. switching lists. */ list_move_tail(&lock->list, &res->granted); - mlog(0, "ast: Adding to granted list... type=%d, " - "convert_type=%d\n", lock->ml.type, lock->ml.convert_type); + mlog(0, "%s: res %.*s, lock %u:%llu, Granted type %d => %d\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(cookie)), + lock->ml.type, lock->ml.convert_type); + if (lock->ml.convert_type != LKM_IVMODE) { lock->ml.type = lock->ml.convert_type; lock->ml.convert_type = LKM_IVMODE; @@ -426,9 +455,9 @@ int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, size_t veclen = 1; int status; - mlog_entry("res %.*s, to=%u, type=%d, blocked_type=%d\n", - res->lockname.len, res->lockname.name, lock->ml.node, - msg_type, blocked_type); + mlog(0, "%s: res %.*s, to %u, type %d, blocked_type %d\n", dlm->name, + res->lockname.len, res->lockname.name, lock->ml.node, msg_type, + blocked_type); memset(&past, 0, sizeof(struct dlm_proxy_ast)); past.node_idx = dlm->node_num; @@ -441,7 +470,6 @@ int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, vec[0].iov_len = sizeof(struct dlm_proxy_ast); vec[0].iov_base = &past; if (flags & DLM_LKSB_GET_LVB) { - mlog(0, "returning requested LVB data\n"); be32_add_cpu(&past.flags, LKM_GET_LVB); vec[1].iov_len = DLM_LVB_LEN; vec[1].iov_base = lock->lksb->lvb; @@ -451,8 +479,8 @@ int dlm_send_proxy_ast_msg(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, ret = o2net_send_message_vec(DLM_PROXY_AST_MSG, dlm->key, vec, veclen, lock->ml.node, &status); if (ret < 0) - mlog(ML_ERROR, "Error %d when sending message %u (key 0x%x) to " - "node %u\n", ret, DLM_PROXY_AST_MSG, dlm->key, + mlog(ML_ERROR, "%s: res %.*s, error %d send AST to node %u\n", + dlm->name, res->lockname.len, res->lockname.name, ret, lock->ml.node); else { if (status == DLM_RECOVERING) { diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index b36d0bf..4bdf7ba 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -50,10 +50,10 @@ #define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l) enum dlm_mle_type { - DLM_MLE_BLOCK, - DLM_MLE_MASTER, - DLM_MLE_MIGRATION, - DLM_MLE_NUM_TYPES + DLM_MLE_BLOCK = 0, + DLM_MLE_MASTER = 1, + DLM_MLE_MIGRATION = 2, + DLM_MLE_NUM_TYPES = 3, }; struct dlm_master_list_entry { @@ -82,8 +82,8 @@ struct dlm_master_list_entry { enum dlm_ast_type { DLM_AST = 0, - DLM_BAST, - DLM_ASTUNLOCK + DLM_BAST = 1, + DLM_ASTUNLOCK = 2, }; @@ -119,9 +119,9 @@ struct dlm_recovery_ctxt enum dlm_ctxt_state { DLM_CTXT_NEW = 0, - DLM_CTXT_JOINED, - DLM_CTXT_IN_SHUTDOWN, - DLM_CTXT_LEAVING, + DLM_CTXT_JOINED = 1, + DLM_CTXT_IN_SHUTDOWN = 2, + DLM_CTXT_LEAVING = 3, }; struct dlm_ctxt @@ -388,8 +388,8 @@ struct dlm_lock enum dlm_lockres_list { DLM_GRANTED_LIST = 0, - DLM_CONVERTING_LIST, - DLM_BLOCKED_LIST + DLM_CONVERTING_LIST = 1, + DLM_BLOCKED_LIST = 2, }; static inline int dlm_lvb_is_empty(char *lvb) @@ -427,27 +427,27 @@ struct dlm_node_iter enum { - DLM_MASTER_REQUEST_MSG = 500, - DLM_UNUSED_MSG1, /* 501 */ - DLM_ASSERT_MASTER_MSG, /* 502 */ - DLM_CREATE_LOCK_MSG, /* 503 */ - DLM_CONVERT_LOCK_MSG, /* 504 */ - DLM_PROXY_AST_MSG, /* 505 */ - DLM_UNLOCK_LOCK_MSG, /* 506 */ - DLM_DEREF_LOCKRES_MSG, /* 507 */ - DLM_MIGRATE_REQUEST_MSG, /* 508 */ - DLM_MIG_LOCKRES_MSG, /* 509 */ - DLM_QUERY_JOIN_MSG, /* 510 */ - DLM_ASSERT_JOINED_MSG, /* 511 */ - DLM_CANCEL_JOIN_MSG, /* 512 */ - DLM_EXIT_DOMAIN_MSG, /* 513 */ - DLM_MASTER_REQUERY_MSG, /* 514 */ - DLM_LOCK_REQUEST_MSG, /* 515 */ - DLM_RECO_DATA_DONE_MSG, /* 516 */ - DLM_BEGIN_RECO_MSG, /* 517 */ - DLM_FINALIZE_RECO_MSG, /* 518 */ - DLM_QUERY_REGION, /* 519 */ - DLM_QUERY_NODEINFO, /* 520 */ + DLM_MASTER_REQUEST_MSG = 500, + DLM_UNUSED_MSG1 = 501, + DLM_ASSERT_MASTER_MSG = 502, + DLM_CREATE_LOCK_MSG = 503, + DLM_CONVERT_LOCK_MSG = 504, + DLM_PROXY_AST_MSG = 505, + DLM_UNLOCK_LOCK_MSG = 506, + DLM_DEREF_LOCKRES_MSG = 507, + DLM_MIGRATE_REQUEST_MSG = 508, + DLM_MIG_LOCKRES_MSG = 509, + DLM_QUERY_JOIN_MSG = 510, + DLM_ASSERT_JOINED_MSG = 511, + DLM_CANCEL_JOIN_MSG = 512, + DLM_EXIT_DOMAIN_MSG = 513, + DLM_MASTER_REQUERY_MSG = 514, + DLM_LOCK_REQUEST_MSG = 515, + DLM_RECO_DATA_DONE_MSG = 516, + DLM_BEGIN_RECO_MSG = 517, + DLM_FINALIZE_RECO_MSG = 518, + DLM_QUERY_REGION = 519, + DLM_QUERY_NODEINFO = 520, }; struct dlm_reco_node_data @@ -460,19 +460,19 @@ struct dlm_reco_node_data enum { DLM_RECO_NODE_DATA_DEAD = -1, DLM_RECO_NODE_DATA_INIT = 0, - DLM_RECO_NODE_DATA_REQUESTING, - DLM_RECO_NODE_DATA_REQUESTED, - DLM_RECO_NODE_DATA_RECEIVING, - DLM_RECO_NODE_DATA_DONE, - DLM_RECO_NODE_DATA_FINALIZE_SENT, + DLM_RECO_NODE_DATA_REQUESTING = 1, + DLM_RECO_NODE_DATA_REQUESTED = 2, + DLM_RECO_NODE_DATA_RECEIVING = 3, + DLM_RECO_NODE_DATA_DONE = 4, + DLM_RECO_NODE_DATA_FINALIZE_SENT = 5, }; enum { DLM_MASTER_RESP_NO = 0, - DLM_MASTER_RESP_YES, - DLM_MASTER_RESP_MAYBE, - DLM_MASTER_RESP_ERROR + DLM_MASTER_RESP_YES = 1, + DLM_MASTER_RESP_MAYBE = 2, + DLM_MASTER_RESP_ERROR = 3, }; @@ -649,9 +649,9 @@ struct dlm_proxy_ast #define DLM_MOD_KEY (0x666c6172) enum dlm_query_join_response_code { JOIN_DISALLOW = 0, - JOIN_OK, - JOIN_OK_NO_MAP, - JOIN_PROTOCOL_MISMATCH, + JOIN_OK = 1, + JOIN_OK_NO_MAP = 2, + JOIN_PROTOCOL_MISMATCH = 3, }; struct dlm_query_join_packet { diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c index 272ec86..04a32be 100644 --- a/fs/ocfs2/dlm/dlmdebug.c +++ b/fs/ocfs2/dlm/dlmdebug.c @@ -370,92 +370,46 @@ static void dlm_debug_get(struct dlm_debug_ctxt *dc) kref_get(&dc->debug_refcnt); } -static struct debug_buffer *debug_buffer_allocate(void) +static int debug_release(struct inode *inode, struct file *file) { - struct debug_buffer *db = NULL; - - db = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); - if (!db) - goto bail; - - db->len = PAGE_SIZE; - db->buf = kmalloc(db->len, GFP_KERNEL); - if (!db->buf) - goto bail; - - return db; -bail: - kfree(db); - return NULL; -} - -static ssize_t debug_buffer_read(struct file *file, char __user *buf, - size_t nbytes, loff_t *ppos) -{ - struct debug_buffer *db = file->private_data; - - return simple_read_from_buffer(buf, nbytes, ppos, db->buf, db->len); -} - -static loff_t debug_buffer_llseek(struct file *file, loff_t off, int whence) -{ - struct debug_buffer *db = file->private_data; - loff_t new = -1; - - switch (whence) { - case 0: - new = off; - break; - case 1: - new = file->f_pos + off; - break; - } - - if (new < 0 || new > db->len) - return -EINVAL; - - return (file->f_pos = new); + free_page((unsigned long)file->private_data); + return 0; } -static int debug_buffer_release(struct inode *inode, struct file *file) +static ssize_t debug_read(struct file *file, char __user *buf, + size_t nbytes, loff_t *ppos) { - struct debug_buffer *db = file->private_data; - - if (db) - kfree(db->buf); - kfree(db); - - return 0; + return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, + i_size_read(file->f_mapping->host)); } /* end - util funcs */ /* begin - purge list funcs */ -static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db) +static int debug_purgelist_print(struct dlm_ctxt *dlm, char *buf, int len) { struct dlm_lock_resource *res; int out = 0; unsigned long total = 0; - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Dumping Purgelist for Domain: %s\n", dlm->name); spin_lock(&dlm->spinlock); list_for_each_entry(res, &dlm->purge_list, purge) { ++total; - if (db->len - out < 100) + if (len - out < 100) continue; spin_lock(&res->spinlock); out += stringify_lockname(res->lockname.name, res->lockname.len, - db->buf + out, db->len - out); - out += snprintf(db->buf + out, db->len - out, "\t%ld\n", + buf + out, len - out); + out += snprintf(buf + out, len - out, "\t%ld\n", (jiffies - res->last_used)/HZ); spin_unlock(&res->spinlock); } spin_unlock(&dlm->spinlock); - out += snprintf(db->buf + out, db->len - out, - "Total on list: %ld\n", total); + out += snprintf(buf + out, len - out, "Total on list: %ld\n", total); return out; } @@ -463,15 +417,15 @@ static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db) static int debug_purgelist_open(struct inode *inode, struct file *file) { struct dlm_ctxt *dlm = inode->i_private; - struct debug_buffer *db; + char *buf = NULL; - db = debug_buffer_allocate(); - if (!db) + buf = (char *) get_zeroed_page(GFP_NOFS); + if (!buf) goto bail; - db->len = debug_purgelist_print(dlm, db); + i_size_write(inode, debug_purgelist_print(dlm, buf, PAGE_SIZE - 1)); - file->private_data = db; + file->private_data = buf; return 0; bail: @@ -480,14 +434,14 @@ bail: static const struct file_operations debug_purgelist_fops = { .open = debug_purgelist_open, - .release = debug_buffer_release, - .read = debug_buffer_read, - .llseek = debug_buffer_llseek, + .release = debug_release, + .read = debug_read, + .llseek = generic_file_llseek, }; /* end - purge list funcs */ /* begin - debug mle funcs */ -static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db) +static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len) { struct dlm_master_list_entry *mle; struct hlist_head *bucket; @@ -495,7 +449,7 @@ static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db) int i, out = 0; unsigned long total = 0, longest = 0, bucket_count = 0; - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Dumping MLEs for Domain: %s\n", dlm->name); spin_lock(&dlm->master_lock); @@ -506,16 +460,16 @@ static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db) master_hash_node); ++total; ++bucket_count; - if (db->len - out < 200) + if (len - out < 200) continue; - out += dump_mle(mle, db->buf + out, db->len - out); + out += dump_mle(mle, buf + out, len - out); } longest = max(longest, bucket_count); bucket_count = 0; } spin_unlock(&dlm->master_lock); - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Total: %ld, Longest: %ld\n", total, longest); return out; } @@ -523,15 +477,15 @@ static int debug_mle_print(struct dlm_ctxt *dlm, struct debug_buffer *db) static int debug_mle_open(struct inode *inode, struct file *file) { struct dlm_ctxt *dlm = inode->i_private; - struct debug_buffer *db; + char *buf = NULL; - db = debug_buffer_allocate(); - if (!db) + buf = (char *) get_zeroed_page(GFP_NOFS); + if (!buf) goto bail; - db->len = debug_mle_print(dlm, db); + i_size_write(inode, debug_mle_print(dlm, buf, PAGE_SIZE - 1)); - file->private_data = db; + file->private_data = buf; return 0; bail: @@ -540,9 +494,9 @@ bail: static const struct file_operations debug_mle_fops = { .open = debug_mle_open, - .release = debug_buffer_release, - .read = debug_buffer_read, - .llseek = debug_buffer_llseek, + .release = debug_release, + .read = debug_read, + .llseek = generic_file_llseek, }; /* end - debug mle funcs */ @@ -757,7 +711,7 @@ static const struct file_operations debug_lockres_fops = { /* end - debug lockres funcs */ /* begin - debug state funcs */ -static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) +static int debug_state_print(struct dlm_ctxt *dlm, char *buf, int len) { int out = 0; struct dlm_reco_node_data *node; @@ -781,35 +735,35 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) } /* Domain: xxxxxxxxxx Key: 0xdfbac769 */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Domain: %s Key: 0x%08x Protocol: %d.%d\n", dlm->name, dlm->key, dlm->dlm_locking_proto.pv_major, dlm->dlm_locking_proto.pv_minor); /* Thread Pid: xxx Node: xxx State: xxxxx */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Thread Pid: %d Node: %d State: %s\n", - dlm->dlm_thread_task->pid, dlm->node_num, state); + task_pid_nr(dlm->dlm_thread_task), dlm->node_num, state); /* Number of Joins: xxx Joining Node: xxx */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Number of Joins: %d Joining Node: %d\n", dlm->num_joins, dlm->joining_node); /* Domain Map: xx xx xx */ - out += snprintf(db->buf + out, db->len - out, "Domain Map: "); + out += snprintf(buf + out, len - out, "Domain Map: "); out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, - db->buf + out, db->len - out); - out += snprintf(db->buf + out, db->len - out, "\n"); + buf + out, len - out); + out += snprintf(buf + out, len - out, "\n"); /* Live Map: xx xx xx */ - out += snprintf(db->buf + out, db->len - out, "Live Map: "); + out += snprintf(buf + out, len - out, "Live Map: "); out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, - db->buf + out, db->len - out); - out += snprintf(db->buf + out, db->len - out, "\n"); + buf + out, len - out); + out += snprintf(buf + out, len - out, "\n"); /* Lock Resources: xxx (xxx) */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Lock Resources: %d (%d)\n", atomic_read(&dlm->res_cur_count), atomic_read(&dlm->res_tot_count)); @@ -821,29 +775,29 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) cur_mles += atomic_read(&dlm->mle_cur_count[i]); /* MLEs: xxx (xxx) */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "MLEs: %d (%d)\n", cur_mles, tot_mles); /* Blocking: xxx (xxx) */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, " Blocking: %d (%d)\n", atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]), atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK])); /* Mastery: xxx (xxx) */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, " Mastery: %d (%d)\n", atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]), atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER])); /* Migration: xxx (xxx) */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, " Migration: %d (%d)\n", atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]), atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION])); /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Lists: Dirty=%s Purge=%s PendingASTs=%s " "PendingBASTs=%s\n", (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"), @@ -852,12 +806,12 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) (list_empty(&dlm->pending_basts) ? "Empty" : "InUse")); /* Purge Count: xxx Refs: xxx */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Purge Count: %d Refs: %d\n", dlm->purge_count, atomic_read(&dlm->dlm_refs.refcount)); /* Dead Node: xxx */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Dead Node: %d\n", dlm->reco.dead_node); /* What about DLM_RECO_STATE_FINALIZE? */ @@ -867,19 +821,19 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) state = "INACTIVE"; /* Recovery Pid: xxxx Master: xxx State: xxxx */ - out += snprintf(db->buf + out, db->len - out, + out += snprintf(buf + out, len - out, "Recovery Pid: %d Master: %d State: %s\n", - dlm->dlm_reco_thread_task->pid, + task_pid_nr(dlm->dlm_reco_thread_task), dlm->reco.new_master, state); /* Recovery Map: xx xx */ - out += snprintf(db->buf + out, db->len - out, "Recovery Map: "); + out += snprintf(buf + out, len - out, "Recovery Map: "); out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, - db->buf + out, db->len - out); - out += snprintf(db->buf + out, db->len - out, "\n"); + buf + out, len - out); + out += snprintf(buf + out, len - out, "\n"); /* Recovery Node State: */ - out += snprintf(db->buf + out, db->len - out, "Recovery Node State:\n"); + out += snprintf(buf + out, len - out, "Recovery Node State:\n"); list_for_each_entry(node, &dlm->reco.node_data, list) { switch (node->state) { case DLM_RECO_NODE_DATA_INIT: @@ -907,7 +861,7 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) state = "BAD"; break; } - out += snprintf(db->buf + out, db->len - out, "\t%u - %s\n", + out += snprintf(buf + out, len - out, "\t%u - %s\n", node->node_num, state); } @@ -919,15 +873,15 @@ static int debug_state_print(struct dlm_ctxt *dlm, struct debug_buffer *db) static int debug_state_open(struct inode *inode, struct file *file) { struct dlm_ctxt *dlm = inode->i_private; - struct debug_buffer *db = NULL; + char *buf = NULL; - db = debug_buffer_allocate(); - if (!db) + buf = (char *) get_zeroed_page(GFP_NOFS); + if (!buf) goto bail; - db->len = debug_state_print(dlm, db); + i_size_write(inode, debug_state_print(dlm, buf, PAGE_SIZE - 1)); - file->private_data = db; + file->private_data = buf; return 0; bail: @@ -936,9 +890,9 @@ bail: static const struct file_operations debug_state_fops = { .open = debug_state_open, - .release = debug_buffer_release, - .read = debug_buffer_read, - .llseek = debug_buffer_llseek, + .release = debug_release, + .read = debug_read, + .llseek = generic_file_llseek, }; /* end - debug state funcs */ @@ -1002,14 +956,10 @@ void dlm_debug_shutdown(struct dlm_ctxt *dlm) struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; if (dc) { - if (dc->debug_purgelist_dentry) - debugfs_remove(dc->debug_purgelist_dentry); - if (dc->debug_mle_dentry) - debugfs_remove(dc->debug_mle_dentry); - if (dc->debug_lockres_dentry) - debugfs_remove(dc->debug_lockres_dentry); - if (dc->debug_state_dentry) - debugfs_remove(dc->debug_state_dentry); + debugfs_remove(dc->debug_purgelist_dentry); + debugfs_remove(dc->debug_mle_dentry); + debugfs_remove(dc->debug_lockres_dentry); + debugfs_remove(dc->debug_state_dentry); dlm_debug_put(dc); } } @@ -1040,8 +990,7 @@ bail: void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm) { - if (dlm->dlm_debugfs_subroot) - debugfs_remove(dlm->dlm_debugfs_subroot); + debugfs_remove(dlm->dlm_debugfs_subroot); } /* debugfs root */ @@ -1057,7 +1006,6 @@ int dlm_create_debugfs_root(void) void dlm_destroy_debugfs_root(void) { - if (dlm_debugfs_root) - debugfs_remove(dlm_debugfs_root); + debugfs_remove(dlm_debugfs_root); } #endif /* CONFIG_DEBUG_FS */ diff --git a/fs/ocfs2/dlm/dlmdebug.h b/fs/ocfs2/dlm/dlmdebug.h index 8c686d2..1f27c48 100644 --- a/fs/ocfs2/dlm/dlmdebug.h +++ b/fs/ocfs2/dlm/dlmdebug.h @@ -37,11 +37,6 @@ struct dlm_debug_ctxt { struct dentry *debug_purgelist_dentry; }; -struct debug_buffer { - int len; - char *buf; -}; - struct debug_lockres { int dl_len; char *dl_buf; diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c index 58a93b9..7e38a07 100644 --- a/fs/ocfs2/dlm/dlmdomain.c +++ b/fs/ocfs2/dlm/dlmdomain.c @@ -460,8 +460,6 @@ redo_bucket: } cond_resched_lock(&dlm->spinlock); num += n; - mlog(0, "%s: touched %d lockreses in bucket %d " - "(tot=%d)\n", dlm->name, n, i, num); } spin_unlock(&dlm->spinlock); wake_up(&dlm->dlm_thread_wq); @@ -959,7 +957,7 @@ static int dlm_match_regions(struct dlm_ctxt *dlm, r += O2HB_MAX_REGION_NAME_LEN; } - local = kmalloc(sizeof(qr->qr_regions), GFP_KERNEL); + local = kmalloc(sizeof(qr->qr_regions), GFP_ATOMIC); if (!local) { status = -ENOMEM; goto bail; @@ -1661,8 +1659,8 @@ bail: static void dlm_unregister_domain_handlers(struct dlm_ctxt *dlm) { - o2hb_unregister_callback(NULL, &dlm->dlm_hb_up); - o2hb_unregister_callback(NULL, &dlm->dlm_hb_down); + o2hb_unregister_callback(dlm->name, &dlm->dlm_hb_up); + o2hb_unregister_callback(dlm->name, &dlm->dlm_hb_down); o2net_unregister_handler_list(&dlm->dlm_domain_handlers); } @@ -1674,13 +1672,13 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm) o2hb_setup_callback(&dlm->dlm_hb_down, O2HB_NODE_DOWN_CB, dlm_hb_node_down_cb, dlm, DLM_HB_NODE_DOWN_PRI); - status = o2hb_register_callback(NULL, &dlm->dlm_hb_down); + status = o2hb_register_callback(dlm->name, &dlm->dlm_hb_down); if (status) goto bail; o2hb_setup_callback(&dlm->dlm_hb_up, O2HB_NODE_UP_CB, dlm_hb_node_up_cb, dlm, DLM_HB_NODE_UP_PRI); - status = o2hb_register_callback(NULL, &dlm->dlm_hb_up); + status = o2hb_register_callback(dlm->name, &dlm->dlm_hb_up); if (status) goto bail; diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c index 69cf369..7009292 100644 --- a/fs/ocfs2/dlm/dlmlock.c +++ b/fs/ocfs2/dlm/dlmlock.c @@ -106,6 +106,9 @@ static int dlm_can_grant_new_lock(struct dlm_lock_resource *res, if (!dlm_lock_compatible(tmplock->ml.type, lock->ml.type)) return 0; + if (!dlm_lock_compatible(tmplock->ml.convert_type, + lock->ml.type)) + return 0; } return 1; diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index f564b0e..59f0f6b 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -2346,7 +2346,8 @@ static void dlm_deref_lockres_worker(struct dlm_work_item *item, void *data) */ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm, struct dlm_lock_resource *res, - int *numlocks) + int *numlocks, + int *hasrefs) { int ret; int i; @@ -2356,6 +2357,9 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm, assert_spin_locked(&res->spinlock); + *numlocks = 0; + *hasrefs = 0; + ret = -EINVAL; if (res->owner == DLM_LOCK_RES_OWNER_UNKNOWN) { mlog(0, "cannot migrate lockres with unknown owner!\n"); @@ -2386,7 +2390,13 @@ static int dlm_is_lockres_migrateable(struct dlm_ctxt *dlm, } *numlocks = count; - mlog(0, "migrateable lockres having %d locks\n", *numlocks); + + count = find_next_bit(res->refmap, O2NM_MAX_NODES, 0); + if (count < O2NM_MAX_NODES) + *hasrefs = 1; + + mlog(0, "%s: res %.*s, Migrateable, locks %d, refs %d\n", dlm->name, + res->lockname.len, res->lockname.name, *numlocks, *hasrefs); leave: return ret; @@ -2408,7 +2418,7 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, const char *name; unsigned int namelen; int mle_added = 0; - int numlocks; + int numlocks, hasrefs; int wake = 0; if (!dlm_grab(dlm)) @@ -2417,13 +2427,13 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, name = res->lockname.name; namelen = res->lockname.len; - mlog(0, "migrating %.*s to %u\n", namelen, name, target); + mlog(0, "%s: Migrating %.*s to %u\n", dlm->name, namelen, name, target); /* * ensure this lockres is a proper candidate for migration */ spin_lock(&res->spinlock); - ret = dlm_is_lockres_migrateable(dlm, res, &numlocks); + ret = dlm_is_lockres_migrateable(dlm, res, &numlocks, &hasrefs); if (ret < 0) { spin_unlock(&res->spinlock); goto leave; @@ -2431,10 +2441,8 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, spin_unlock(&res->spinlock); /* no work to do */ - if (numlocks == 0) { - mlog(0, "no locks were found on this lockres! done!\n"); + if (numlocks == 0 && !hasrefs) goto leave; - } /* * preallocate up front @@ -2459,14 +2467,14 @@ static int dlm_migrate_lockres(struct dlm_ctxt *dlm, * find a node to migrate the lockres to */ - mlog(0, "picking a migration node\n"); spin_lock(&dlm->spinlock); /* pick a new node */ if (!test_bit(target, dlm->domain_map) || target >= O2NM_MAX_NODES) { target = dlm_pick_migration_target(dlm, res); } - mlog(0, "node %u chosen for migration\n", target); + mlog(0, "%s: res %.*s, Node %u chosen for migration\n", dlm->name, + namelen, name, target); if (target >= O2NM_MAX_NODES || !test_bit(target, dlm->domain_map)) { @@ -2667,7 +2675,7 @@ int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) { int ret; int lock_dropped = 0; - int numlocks; + int numlocks, hasrefs; spin_lock(&res->spinlock); if (res->owner != dlm->node_num) { @@ -2681,8 +2689,8 @@ int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) } /* No need to migrate a lockres having no locks */ - ret = dlm_is_lockres_migrateable(dlm, res, &numlocks); - if (ret >= 0 && numlocks == 0) { + ret = dlm_is_lockres_migrateable(dlm, res, &numlocks, &hasrefs); + if (ret >= 0 && numlocks == 0 && !hasrefs) { spin_unlock(&res->spinlock); goto leave; } @@ -2915,6 +2923,12 @@ static u8 dlm_pick_migration_target(struct dlm_ctxt *dlm, } queue++; } + + nodenum = find_next_bit(res->refmap, O2NM_MAX_NODES, 0); + if (nodenum < O2NM_MAX_NODES) { + spin_unlock(&res->spinlock); + return nodenum; + } spin_unlock(&res->spinlock); mlog(0, "have not found a suitable target yet! checking domain map\n"); diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c index 2211acf..1d6d1d2 100644 --- a/fs/ocfs2/dlm/dlmthread.c +++ b/fs/ocfs2/dlm/dlmthread.c @@ -122,15 +122,13 @@ int __dlm_lockres_unused(struct dlm_lock_resource *res) void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) { - mlog_entry("%.*s\n", res->lockname.len, res->lockname.name); - assert_spin_locked(&dlm->spinlock); assert_spin_locked(&res->spinlock); if (__dlm_lockres_unused(res)){ if (list_empty(&res->purge)) { - mlog(0, "putting lockres %.*s:%p onto purge list\n", - res->lockname.len, res->lockname.name, res); + mlog(0, "%s: Adding res %.*s to purge list\n", + dlm->name, res->lockname.len, res->lockname.name); res->last_used = jiffies; dlm_lockres_get(res); @@ -138,8 +136,8 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, dlm->purge_count++; } } else if (!list_empty(&res->purge)) { - mlog(0, "removing lockres %.*s:%p from purge list, owner=%u\n", - res->lockname.len, res->lockname.name, res, res->owner); + mlog(0, "%s: Removing res %.*s from purge list\n", + dlm->name, res->lockname.len, res->lockname.name); list_del_init(&res->purge); dlm_lockres_put(res); @@ -150,7 +148,6 @@ void __dlm_lockres_calc_usage(struct dlm_ctxt *dlm, void dlm_lockres_calc_usage(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) { - mlog_entry("%.*s\n", res->lockname.len, res->lockname.name); spin_lock(&dlm->spinlock); spin_lock(&res->spinlock); @@ -171,9 +168,8 @@ static void dlm_purge_lockres(struct dlm_ctxt *dlm, master = (res->owner == dlm->node_num); - - mlog(0, "purging lockres %.*s, master = %d\n", res->lockname.len, - res->lockname.name, master); + mlog(0, "%s: Purging res %.*s, master %d\n", dlm->name, + res->lockname.len, res->lockname.name, master); if (!master) { res->state |= DLM_LOCK_RES_DROPPING_REF; @@ -189,27 +185,25 @@ static void dlm_purge_lockres(struct dlm_ctxt *dlm, /* clear our bit from the master's refmap, ignore errors */ ret = dlm_drop_lockres_ref(dlm, res); if (ret < 0) { - mlog_errno(ret); + mlog(ML_ERROR, "%s: deref %.*s failed %d\n", dlm->name, + res->lockname.len, res->lockname.name, ret); if (!dlm_is_host_down(ret)) BUG(); } - mlog(0, "%s:%.*s: dlm_deref_lockres returned %d\n", - dlm->name, res->lockname.len, res->lockname.name, ret); spin_lock(&dlm->spinlock); spin_lock(&res->spinlock); } if (!list_empty(&res->purge)) { - mlog(0, "removing lockres %.*s:%p from purgelist, " - "master = %d\n", res->lockname.len, res->lockname.name, - res, master); + mlog(0, "%s: Removing res %.*s from purgelist, master %d\n", + dlm->name, res->lockname.len, res->lockname.name, master); list_del_init(&res->purge); dlm_lockres_put(res); dlm->purge_count--; } if (!__dlm_lockres_unused(res)) { - mlog(ML_ERROR, "found lockres %s:%.*s: in use after deref\n", + mlog(ML_ERROR, "%s: res %.*s in use after deref\n", dlm->name, res->lockname.len, res->lockname.name); __dlm_print_one_lock_resource(res); BUG(); @@ -266,10 +260,10 @@ static void dlm_run_purge_list(struct dlm_ctxt *dlm, unused = __dlm_lockres_unused(lockres); if (!unused || (lockres->state & DLM_LOCK_RES_MIGRATING)) { - mlog(0, "lockres %s:%.*s: is in use or " - "being remastered, used %d, state %d\n", - dlm->name, lockres->lockname.len, - lockres->lockname.name, !unused, lockres->state); + mlog(0, "%s: res %.*s is in use or being remastered, " + "used %d, state %d\n", dlm->name, + lockres->lockname.len, lockres->lockname.name, + !unused, lockres->state); list_move_tail(&dlm->purge_list, &lockres->purge); spin_unlock(&lockres->spinlock); continue; @@ -296,15 +290,12 @@ static void dlm_shuffle_lists(struct dlm_ctxt *dlm, struct list_head *head; int can_grant = 1; - //mlog(0, "res->lockname.len=%d\n", res->lockname.len); - //mlog(0, "res->lockname.name=%p\n", res->lockname.name); - //mlog(0, "shuffle res %.*s\n", res->lockname.len, - // res->lockname.name); - - /* because this function is called with the lockres + /* + * Because this function is called with the lockres * spinlock, and because we know that it is not migrating/ * recovering/in-progress, it is fine to reserve asts and - * basts right before queueing them all throughout */ + * basts right before queueing them all throughout + */ assert_spin_locked(&dlm->ast_lock); assert_spin_locked(&res->spinlock); BUG_ON((res->state & (DLM_LOCK_RES_MIGRATING| @@ -314,13 +305,13 @@ static void dlm_shuffle_lists(struct dlm_ctxt *dlm, converting: if (list_empty(&res->converting)) goto blocked; - mlog(0, "res %.*s has locks on a convert queue\n", res->lockname.len, - res->lockname.name); + mlog(0, "%s: res %.*s has locks on the convert queue\n", dlm->name, + res->lockname.len, res->lockname.name); target = list_entry(res->converting.next, struct dlm_lock, list); if (target->ml.convert_type == LKM_IVMODE) { - mlog(ML_ERROR, "%.*s: converting a lock with no " - "convert_type!\n", res->lockname.len, res->lockname.name); + mlog(ML_ERROR, "%s: res %.*s converting lock to invalid mode\n", + dlm->name, res->lockname.len, res->lockname.name); BUG(); } head = &res->granted; @@ -365,9 +356,12 @@ converting: spin_lock(&target->spinlock); BUG_ON(target->ml.highest_blocked != LKM_IVMODE); - mlog(0, "calling ast for converting lock: %.*s, have: %d, " - "granting: %d, node: %u\n", res->lockname.len, - res->lockname.name, target->ml.type, + mlog(0, "%s: res %.*s, AST for Converting lock %u:%llu, type " + "%d => %d, node %u\n", dlm->name, res->lockname.len, + res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(target->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(target->ml.cookie)), + target->ml.type, target->ml.convert_type, target->ml.node); target->ml.type = target->ml.convert_type; @@ -428,11 +422,14 @@ blocked: spin_lock(&target->spinlock); BUG_ON(target->ml.highest_blocked != LKM_IVMODE); - mlog(0, "calling ast for blocked lock: %.*s, granting: %d, " - "node: %u\n", res->lockname.len, res->lockname.name, + mlog(0, "%s: res %.*s, AST for Blocked lock %u:%llu, type %d, " + "node %u\n", dlm->name, res->lockname.len, + res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(target->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(target->ml.cookie)), target->ml.type, target->ml.node); - // target->ml.type is already correct + /* target->ml.type is already correct */ list_move_tail(&target->list, &res->granted); BUG_ON(!target->lksb); @@ -453,7 +450,6 @@ leave: /* must have NO locks when calling this with res !=NULL * */ void dlm_kick_thread(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) { - mlog_entry("dlm=%p, res=%p\n", dlm, res); if (res) { spin_lock(&dlm->spinlock); spin_lock(&res->spinlock); @@ -466,8 +462,6 @@ void dlm_kick_thread(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) { - mlog_entry("dlm=%p, res=%p\n", dlm, res); - assert_spin_locked(&dlm->spinlock); assert_spin_locked(&res->spinlock); @@ -484,13 +478,16 @@ void __dlm_dirty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res) res->state |= DLM_LOCK_RES_DIRTY; } } + + mlog(0, "%s: res %.*s\n", dlm->name, res->lockname.len, + res->lockname.name); } /* Launch the NM thread for the mounted volume */ int dlm_launch_thread(struct dlm_ctxt *dlm) { - mlog(0, "starting dlm thread...\n"); + mlog(0, "Starting dlm_thread...\n"); dlm->dlm_thread_task = kthread_run(dlm_thread, dlm, "dlm_thread"); if (IS_ERR(dlm->dlm_thread_task)) { @@ -505,7 +502,7 @@ int dlm_launch_thread(struct dlm_ctxt *dlm) void dlm_complete_thread(struct dlm_ctxt *dlm) { if (dlm->dlm_thread_task) { - mlog(ML_KTHREAD, "waiting for dlm thread to exit\n"); + mlog(ML_KTHREAD, "Waiting for dlm thread to exit\n"); kthread_stop(dlm->dlm_thread_task); dlm->dlm_thread_task = NULL; } @@ -536,7 +533,12 @@ static void dlm_flush_asts(struct dlm_ctxt *dlm) /* get an extra ref on lock */ dlm_lock_get(lock); res = lock->lockres; - mlog(0, "delivering an ast for this lockres\n"); + mlog(0, "%s: res %.*s, Flush AST for lock %u:%llu, type %d, " + "node %u\n", dlm->name, res->lockname.len, + res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), + lock->ml.type, lock->ml.node); BUG_ON(!lock->ast_pending); @@ -557,9 +559,9 @@ static void dlm_flush_asts(struct dlm_ctxt *dlm) /* possible that another ast was queued while * we were delivering the last one */ if (!list_empty(&lock->ast_list)) { - mlog(0, "aha another ast got queued while " - "we were finishing the last one. will " - "keep the ast_pending flag set.\n"); + mlog(0, "%s: res %.*s, AST queued while flushing last " + "one\n", dlm->name, res->lockname.len, + res->lockname.name); } else lock->ast_pending = 0; @@ -590,8 +592,12 @@ static void dlm_flush_asts(struct dlm_ctxt *dlm) dlm_lock_put(lock); spin_unlock(&dlm->ast_lock); - mlog(0, "delivering a bast for this lockres " - "(blocked = %d\n", hi); + mlog(0, "%s: res %.*s, Flush BAST for lock %u:%llu, " + "blocked %d, node %u\n", + dlm->name, res->lockname.len, res->lockname.name, + dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)), + dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)), + hi, lock->ml.node); if (lock->ml.node != dlm->node_num) { ret = dlm_send_proxy_bast(dlm, res, lock, hi); @@ -605,9 +611,9 @@ static void dlm_flush_asts(struct dlm_ctxt *dlm) /* possible that another bast was queued while * we were delivering the last one */ if (!list_empty(&lock->bast_list)) { - mlog(0, "aha another bast got queued while " - "we were finishing the last one. will " - "keep the bast_pending flag set.\n"); + mlog(0, "%s: res %.*s, BAST queued while flushing last " + "one\n", dlm->name, res->lockname.len, + res->lockname.name); } else lock->bast_pending = 0; @@ -675,11 +681,12 @@ static int dlm_thread(void *data) spin_lock(&res->spinlock); if (res->owner != dlm->node_num) { __dlm_print_one_lock_resource(res); - mlog(ML_ERROR, "inprog:%s, mig:%s, reco:%s, dirty:%s\n", - res->state & DLM_LOCK_RES_IN_PROGRESS ? "yes" : "no", - res->state & DLM_LOCK_RES_MIGRATING ? "yes" : "no", - res->state & DLM_LOCK_RES_RECOVERING ? "yes" : "no", - res->state & DLM_LOCK_RES_DIRTY ? "yes" : "no"); + mlog(ML_ERROR, "%s: inprog %d, mig %d, reco %d," + " dirty %d\n", dlm->name, + !!(res->state & DLM_LOCK_RES_IN_PROGRESS), + !!(res->state & DLM_LOCK_RES_MIGRATING), + !!(res->state & DLM_LOCK_RES_RECOVERING), + !!(res->state & DLM_LOCK_RES_DIRTY)); } BUG_ON(res->owner != dlm->node_num); @@ -693,8 +700,8 @@ static int dlm_thread(void *data) res->state &= ~DLM_LOCK_RES_DIRTY; spin_unlock(&res->spinlock); spin_unlock(&dlm->ast_lock); - mlog(0, "delaying list shuffling for in-" - "progress lockres %.*s, state=%d\n", + mlog(0, "%s: res %.*s, inprogress, delay list " + "shuffle, state %d\n", dlm->name, res->lockname.len, res->lockname.name, res->state); delay = 1; @@ -706,10 +713,6 @@ static int dlm_thread(void *data) * spinlock and do NOT have the dlm lock. * safe to reserve/queue asts and run the lists. */ - mlog(0, "calling dlm_shuffle_lists with dlm=%s, " - "res=%.*s\n", dlm->name, - res->lockname.len, res->lockname.name); - /* called while holding lockres lock */ dlm_shuffle_lists(dlm, res); res->state &= ~DLM_LOCK_RES_DIRTY; @@ -733,7 +736,8 @@ in_progress: /* unlikely, but we may need to give time to * other tasks */ if (!--n) { - mlog(0, "throttling dlm_thread\n"); + mlog(0, "%s: Throttling dlm thread\n", + dlm->name); break; } } diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c index 75e115f..8c5c0ed 100644 --- a/fs/ocfs2/dlmfs/dlmfs.c +++ b/fs/ocfs2/dlmfs/dlmfs.c @@ -351,11 +351,18 @@ static struct inode *dlmfs_alloc_inode(struct super_block *sb) return &ip->ip_vfs_inode; } -static void dlmfs_destroy_inode(struct inode *inode) +static void dlmfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(dlmfs_inode_cache, DLMFS_I(inode)); } +static void dlmfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, dlmfs_i_callback); +} + static void dlmfs_evict_inode(struct inode *inode) { int status; @@ -643,16 +650,16 @@ static const struct inode_operations dlmfs_file_inode_operations = { .setattr = dlmfs_file_setattr, }; -static int dlmfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *dlmfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags, data, dlmfs_fill_super, mnt); + return mount_nodev(fs_type, flags, data, dlmfs_fill_super); } static struct file_system_type dlmfs_fs_type = { .owner = THIS_MODULE, .name = "ocfs2_dlmfs", - .get_sb = dlmfs_get_sb, + .mount = dlmfs_mount, .kill_sb = kill_litter_super, }; diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c index 19ad145..6adafa5 100644 --- a/fs/ocfs2/export.c +++ b/fs/ocfs2/export.c @@ -138,7 +138,7 @@ check_gen: result = d_obtain_alias(inode); if (!IS_ERR(result)) - result->d_op = &ocfs2_dentry_ops; + d_set_d_op(result, &ocfs2_dentry_ops); else mlog_errno(PTR_ERR(result)); @@ -176,7 +176,7 @@ static struct dentry *ocfs2_get_parent(struct dentry *child) parent = d_obtain_alias(ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0)); if (!IS_ERR(parent)) - parent->d_op = &ocfs2_dentry_ops; + d_set_d_op(parent, &ocfs2_dentry_ops); bail_unlock: ocfs2_inode_unlock(dir, 0); diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 77b4c04..bdadbae0 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -1307,10 +1307,13 @@ bail: return err; } -int ocfs2_permission(struct inode *inode, int mask) +int ocfs2_permission(struct inode *inode, int mask, unsigned int flags) { int ret; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + mlog_entry_void(); ret = ocfs2_inode_lock(inode, NULL, 0); @@ -1320,7 +1323,7 @@ int ocfs2_permission(struct inode *inode, int mask) goto out; } - ret = generic_permission(inode, mask, ocfs2_check_acl); + ret = generic_permission(inode, mask, flags, ocfs2_check_acl); ocfs2_inode_unlock(inode, 0); out: @@ -2241,11 +2244,15 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, mutex_lock(&inode->i_mutex); + ocfs2_iocb_clear_sem_locked(iocb); + relock: /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ if (direct_io) { down_read(&inode->i_alloc_sem); have_alloc_sem = 1; + /* communicate with ocfs2_dio_end_io */ + ocfs2_iocb_set_sem_locked(iocb); } /* @@ -2382,8 +2389,10 @@ out: ocfs2_rw_unlock(inode, rw_level); out_sems: - if (have_alloc_sem) + if (have_alloc_sem) { up_read(&inode->i_alloc_sem); + ocfs2_iocb_clear_sem_locked(iocb); + } mutex_unlock(&inode->i_mutex); @@ -2527,6 +2536,8 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, goto bail; } + ocfs2_iocb_clear_sem_locked(iocb); + /* * buffered reads protect themselves in ->readpage(). O_DIRECT reads * need locks to protect pending reads from racing with truncate. @@ -2534,6 +2545,7 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, if (filp->f_flags & O_DIRECT) { down_read(&inode->i_alloc_sem); have_alloc_sem = 1; + ocfs2_iocb_set_sem_locked(iocb); ret = ocfs2_rw_lock(inode, 0); if (ret < 0) { @@ -2575,8 +2587,10 @@ static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, } bail: - if (have_alloc_sem) + if (have_alloc_sem) { up_read(&inode->i_alloc_sem); + ocfs2_iocb_clear_sem_locked(iocb); + } if (rw_level != -1) ocfs2_rw_unlock(inode, rw_level); mlog_exit(ret); diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h index 97bf761..f5afbbe 100644 --- a/fs/ocfs2/file.h +++ b/fs/ocfs2/file.h @@ -61,7 +61,7 @@ int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, int ocfs2_setattr(struct dentry *dentry, struct iattr *attr); int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); -int ocfs2_permission(struct inode *inode, int mask); +int ocfs2_permission(struct inode *inode, int mask, unsigned int flags); int ocfs2_should_update_atime(struct inode *inode, struct vfsmount *vfsmnt); diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index f935fd6..4068c6c 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -434,7 +434,7 @@ static int ocfs2_read_locked_inode(struct inode *inode, * #1 and #2 can be simply solved by never taking the lock * here for system files (which are the only type we read * during mount). It's a heavier approach, but our main - * concern is user-accesible files anyway. + * concern is user-accessible files anyway. * * #3 works itself out because we'll eventually take the * cluster lock before trusting anything anyway. diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index ff5744e..30c5231 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -147,7 +147,7 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, spin_unlock(&oi->ip_lock); bail_add: - dentry->d_op = &ocfs2_dentry_ops; + d_set_d_op(dentry, &ocfs2_dentry_ops); ret = d_splice_alias(inode, dentry); if (inode) { @@ -415,7 +415,7 @@ static int ocfs2_mknod(struct inode *dir, mlog_errno(status); goto leave; } - dentry->d_op = &ocfs2_dentry_ops; + d_set_d_op(dentry, &ocfs2_dentry_ops); status = ocfs2_add_entry(handle, dentry, inode, OCFS2_I(inode)->ip_blkno, parent_fe_bh, @@ -743,7 +743,7 @@ static int ocfs2_link(struct dentry *old_dentry, } ihold(inode); - dentry->d_op = &ocfs2_dentry_ops; + d_set_d_op(dentry, &ocfs2_dentry_ops); d_instantiate(dentry, inode); out_commit: @@ -1017,8 +1017,11 @@ static int ocfs2_double_lock(struct ocfs2_super *osb, * An error return must mean that no cluster locks * were held on function exit. */ - if (oi1->ip_blkno != oi2->ip_blkno) + if (oi1->ip_blkno != oi2->ip_blkno) { ocfs2_inode_unlock(inode2, 1); + brelse(*bh2); + *bh2 = NULL; + } if (status != -ENOENT) mlog_errno(status); @@ -1794,7 +1797,7 @@ static int ocfs2_symlink(struct inode *dir, mlog_errno(status); goto bail; } - dentry->d_op = &ocfs2_dentry_ops; + d_set_d_op(dentry, &ocfs2_dentry_ops); status = ocfs2_add_entry(handle, dentry, inode, le64_to_cpu(fe->i_blkno), parent_fe_bh, @@ -2459,7 +2462,7 @@ int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, goto out_commit; } - dentry->d_op = &ocfs2_dentry_ops; + d_set_d_op(dentry, &ocfs2_dentry_ops); d_instantiate(dentry, inode); status = 0; out_commit: diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index d840821..51cd689 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -159,7 +159,9 @@ struct ocfs2_lock_res { char l_name[OCFS2_LOCK_ID_MAX_LEN]; unsigned int l_ro_holders; unsigned int l_ex_holders; - unsigned char l_level; + signed char l_level; + signed char l_requested; + signed char l_blocking; /* Data packed - type enum ocfs2_lock_type */ unsigned char l_type; @@ -169,8 +171,6 @@ struct ocfs2_lock_res { unsigned char l_action; /* Data packed - enum type ocfs2_unlock_action */ unsigned char l_unlock_action; - unsigned char l_requested; - unsigned char l_blocking; unsigned int l_pending_gen; spinlock_t l_lock; @@ -420,6 +420,11 @@ struct ocfs2_super struct inode *osb_tl_inode; struct buffer_head *osb_tl_bh; struct delayed_work osb_truncate_log_wq; + /* + * How many clusters in our truncate log. + * It must be protected by osb_tl_inode->i_mutex. + */ + unsigned int truncated_clusters; struct ocfs2_node_map osb_recovering_orphan_dirs; unsigned int *osb_orphan_wipes; diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index c2e4f82..bf2e776 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -350,7 +350,7 @@ enum { #define OCFS2_LAST_LOCAL_SYSTEM_INODE LOCAL_GROUP_QUOTA_SYSTEM_INODE NUM_SYSTEM_INODES }; -#define NUM_GLOBAL_SYSTEM_INODES OCFS2_LAST_GLOBAL_SYSTEM_INODE +#define NUM_GLOBAL_SYSTEM_INODES OCFS2_FIRST_LOCAL_SYSTEM_INODE #define NUM_LOCAL_SYSTEM_INODES \ (NUM_SYSTEM_INODES - OCFS2_FIRST_LOCAL_SYSTEM_INODE) diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c index 252e7c8..a5ebe42 100644 --- a/fs/ocfs2/stack_user.c +++ b/fs/ocfs2/stack_user.c @@ -190,7 +190,7 @@ static struct ocfs2_live_connection *ocfs2_connection_find(const char *name) return c; } - return c; + return NULL; } /* diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c index 5fed60d..71998d4 100644 --- a/fs/ocfs2/suballoc.c +++ b/fs/ocfs2/suballoc.c @@ -1916,7 +1916,7 @@ static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac, if (res->sr_bg_blkno) { /* Attempt to short-circuit the usual search mechanism * by jumping straight to the most recently used - * allocation group. This helps us mantain some + * allocation group. This helps us maintain some * contiguousness across allocations. */ status = ocfs2_search_one_group(ac, handle, bits_wanted, min_bits, res, &bits_left); diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 56f0cb3..17ff46f 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -41,7 +41,6 @@ #include <linux/mount.h> #include <linux/seq_file.h> #include <linux/quotaops.h> -#include <linux/smp_lock.h> #define MLOG_MASK_PREFIX ML_SUPER #include <cluster/masklog.h> @@ -570,11 +569,18 @@ static struct inode *ocfs2_alloc_inode(struct super_block *sb) return &oi->vfs_inode; } -static void ocfs2_destroy_inode(struct inode *inode) +static void ocfs2_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); } +static void ocfs2_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, ocfs2_i_callback); +} + static unsigned long long ocfs2_max_file_offset(unsigned int bbits, unsigned int cbits) { @@ -1236,14 +1242,12 @@ read_super_error: return status; } -static int ocfs2_get_sb(struct file_system_type *fs_type, +static struct dentry *ocfs2_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, - struct vfsmount *mnt) + void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super); } static void ocfs2_kill_sb(struct super_block *sb) @@ -1267,8 +1271,7 @@ out: static struct file_system_type ocfs2_fs_type = { .owner = THIS_MODULE, .name = "ocfs2", - .get_sb = ocfs2_get_sb, /* is this called when we mount - * the fs? */ + .mount = ocfs2_mount, .kill_sb = ocfs2_kill_sb, .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c index 14a2286..e043c4c 100644 --- a/fs/omfs/inode.c +++ b/fs/omfs/inode.c @@ -557,17 +557,16 @@ end: return ret; } -static int omfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, - void *data, struct vfsmount *m) +static struct dentry *omfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, omfs_fill_super, m); + return mount_bdev(fs_type, flags, dev_name, data, omfs_fill_super); } static struct file_system_type omfs_fs_type = { .owner = THIS_MODULE, .name = "omfs", - .get_sb = omfs_get_sb, + .mount = omfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -786,11 +786,11 @@ struct file *nameidata_to_filp(struct nameidata *nd) /* Pick up the filp from the open intent */ filp = nd->intent.open.file; /* Has the filesystem initialised the file for us? */ - if (filp->f_path.dentry == NULL) + if (filp->f_path.dentry == NULL) { + path_get(&nd->path); filp = __dentry_open(nd->path.dentry, nd->path.mnt, filp, NULL, cred); - else - path_put(&nd->path); + } return filp; } diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index ffcd04f..a2a5bff 100644 --- a/fs/openpromfs/inode.c +++ b/fs/openpromfs/inode.c @@ -343,11 +343,18 @@ static struct inode *openprom_alloc_inode(struct super_block *sb) return &oi->vfs_inode; } -static void openprom_destroy_inode(struct inode *inode) +static void openprom_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(op_inode_cachep, OP_I(inode)); } +static void openprom_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, openprom_i_callback); +} + static struct inode *openprom_iget(struct super_block *sb, ino_t ino) { struct inode *inode; @@ -415,16 +422,16 @@ out_no_root: return ret; } -static int openprom_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *openprom_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_single(fs_type, flags, data, openprom_fill_super, mnt); + return mount_single(fs_type, flags, data, openprom_fill_super); } static struct file_system_type openprom_fs_type = { .owner = THIS_MODULE, .name = "openpromfs", - .get_sb = openprom_get_sb, + .mount = openprom_mount, .kill_sb = kill_anon_super, }; @@ -441,7 +441,7 @@ redo: break; } if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLOUT); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } pipe_wait(pipe); @@ -450,7 +450,7 @@ redo: /* Signal writers asynchronously that there is more room. */ if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLOUT); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } if (ret > 0) @@ -612,7 +612,7 @@ redo2: break; } if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLIN); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); do_wakeup = 0; } @@ -623,7 +623,7 @@ redo2: out: mutex_unlock(&inode->i_mutex); if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLIN); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); } if (ret > 0) @@ -715,7 +715,7 @@ pipe_release(struct inode *inode, int decr, int decw) if (!pipe->readers && !pipe->writers) { free_pipe_info(inode); } else { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLIN | POLLOUT); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } @@ -999,12 +999,12 @@ struct file *create_write_pipe(int flags) goto err; err = -ENOMEM; - path.dentry = d_alloc(pipe_mnt->mnt_sb->s_root, &name); + path.dentry = d_alloc_pseudo(pipe_mnt->mnt_sb, &name); if (!path.dentry) goto err_inode; path.mnt = mntget(pipe_mnt); - path.dentry->d_op = &pipefs_dentry_operations; + d_set_d_op(path.dentry, &pipefs_dentry_operations); d_instantiate(path.dentry, inode); err = -ENFILE; @@ -1199,12 +1199,24 @@ int pipe_proc_fn(struct ctl_table *table, int write, void __user *buf, return ret; } +/* + * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same + * location, so checking ->i_pipe is not enough to verify that this is a + * pipe. + */ +struct pipe_inode_info *get_pipe_info(struct file *file) +{ + struct inode *i = file->f_path.dentry->d_inode; + + return S_ISFIFO(i->i_mode) ? i->i_pipe : NULL; +} + long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg) { struct pipe_inode_info *pipe; long ret; - pipe = file->f_path.dentry->d_inode->i_pipe; + pipe = get_pipe_info(file); if (!pipe) return -EBADF; @@ -1241,22 +1253,25 @@ out: return ret; } +static const struct super_operations pipefs_ops = { + .destroy_inode = free_inode_nonrcu, +}; + /* * pipefs should _never_ be mounted by userland - too much of security hassle, * no real gain from having the whole whorehouse mounted. So we don't need * any operations on the root directory. However, we need a non-trivial * d_name - pipe: will go nicely and kill the special-casing in procfs. */ -static int pipefs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *pipefs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_pseudo(fs_type, "pipe:", NULL, PIPEFS_MAGIC, mnt); + return mount_pseudo(fs_type, "pipe:", &pipefs_ops, PIPEFS_MAGIC); } static struct file_system_type pipe_fs_type = { .name = "pipefs", - .get_sb = pipefs_get_sb, + .mount = pipefs_mount, .kill_sb = kill_anon_super, }; @@ -1277,7 +1292,7 @@ static int __init init_pipe_fs(void) static void __exit exit_pipe_fs(void) { unregister_filesystem(&pipe_fs_type); - mntput(pipe_mnt); + mntput_long(pipe_mnt); } fs_initcall(init_pipe_fs); @@ -288,7 +288,7 @@ out: */ static inline int do_refcount_check(struct vfsmount *mnt, int count) { - int mycount = atomic_read(&mnt->mnt_count) - mnt->mnt_ghosts; + int mycount = mnt_get_count(mnt) - mnt->mnt_ghosts; return (mycount > count); } @@ -300,7 +300,7 @@ static inline int do_refcount_check(struct vfsmount *mnt, int count) * Check if any of these mounts that **do not have submounts** * have more references than 'refcnt'. If so return busy. * - * vfsmount lock must be held for read or write + * vfsmount lock must be held for write */ int propagate_mount_busy(struct vfsmount *mnt, int refcnt) { diff --git a/fs/proc/Makefile b/fs/proc/Makefile index 2758e2a..df434c5 100644 --- a/fs/proc/Makefile +++ b/fs/proc/Makefile @@ -10,6 +10,7 @@ proc-$(CONFIG_MMU) := mmu.o task_mmu.o proc-y += inode.o root.o base.o generic.o array.o \ proc_tty.o proc-y += cmdline.o +proc-y += consoles.o proc-y += cpuinfo.o proc-y += devices.o proc-y += interrupts.o diff --git a/fs/proc/array.c b/fs/proc/array.c index fff6572..df2b703 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -95,7 +95,7 @@ static inline void task_name(struct seq_file *m, struct task_struct *p) get_task_comm(tcomm, p); - seq_printf(m, "Name:\t"); + seq_puts(m, "Name:\t"); end = m->buf + m->size; buf = m->buf + m->count; name = tcomm; @@ -122,7 +122,7 @@ static inline void task_name(struct seq_file *m, struct task_struct *p) buf++; } m->count = buf - m->buf; - seq_printf(m, "\n"); + seq_putc(m, '\n'); } /* @@ -208,7 +208,7 @@ static inline void task_state(struct seq_file *m, struct pid_namespace *ns, seq_printf(m, "%d ", GROUP_AT(group_info, g)); put_cred(cred); - seq_printf(m, "\n"); + seq_putc(m, '\n'); } static void render_sigset_t(struct seq_file *m, const char *header, @@ -216,7 +216,7 @@ static void render_sigset_t(struct seq_file *m, const char *header, { int i; - seq_printf(m, "%s", header); + seq_puts(m, header); i = _NSIG; do { @@ -230,7 +230,7 @@ static void render_sigset_t(struct seq_file *m, const char *header, seq_printf(m, "%x", x); } while (i >= 4); - seq_printf(m, "\n"); + seq_putc(m, '\n'); } static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign, @@ -291,12 +291,12 @@ static void render_cap_t(struct seq_file *m, const char *header, { unsigned __capi; - seq_printf(m, "%s", header); + seq_puts(m, header); CAP_FOR_EACH_U32(__capi) { seq_printf(m, "%08x", a->cap[(_KERNEL_CAPABILITY_U32S-1) - __capi]); } - seq_printf(m, "\n"); + seq_putc(m, '\n'); } static inline void task_cap(struct seq_file *m, struct task_struct *p) @@ -329,12 +329,12 @@ static inline void task_context_switch_counts(struct seq_file *m, static void task_cpus_allowed(struct seq_file *m, struct task_struct *task) { - seq_printf(m, "Cpus_allowed:\t"); + seq_puts(m, "Cpus_allowed:\t"); seq_cpumask(m, &task->cpus_allowed); - seq_printf(m, "\n"); - seq_printf(m, "Cpus_allowed_list:\t"); + seq_putc(m, '\n'); + seq_puts(m, "Cpus_allowed_list:\t"); seq_cpumask_list(m, &task->cpus_allowed); - seq_printf(m, "\n"); + seq_putc(m, '\n'); } int proc_pid_status(struct seq_file *m, struct pid_namespace *ns, @@ -535,15 +535,15 @@ int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns, int proc_pid_statm(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task) { - int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0; + unsigned long size = 0, resident = 0, shared = 0, text = 0, data = 0; struct mm_struct *mm = get_task_mm(task); if (mm) { size = task_statm(mm, &shared, &text, &data, &resident); mmput(mm); } - seq_printf(m, "%d %d %d %d %d %d %d\n", - size, resident, shared, text, lib, data, 0); + seq_printf(m, "%lu %lu %lu %lu 0 %lu 0\n", + size, resident, shared, text, data); return 0; } diff --git a/fs/proc/base.c b/fs/proc/base.c index f3d02ca..93f1cdd 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -373,26 +373,20 @@ static int lstats_show_proc(struct seq_file *m, void *v) return -ESRCH; seq_puts(m, "Latency Top version : v0.1\n"); for (i = 0; i < 32; i++) { - if (task->latency_record[i].backtrace[0]) { + struct latency_record *lr = &task->latency_record[i]; + if (lr->backtrace[0]) { int q; - seq_printf(m, "%i %li %li ", - task->latency_record[i].count, - task->latency_record[i].time, - task->latency_record[i].max); + seq_printf(m, "%i %li %li", + lr->count, lr->time, lr->max); for (q = 0; q < LT_BACKTRACEDEPTH; q++) { - char sym[KSYM_SYMBOL_LEN]; - char *c; - if (!task->latency_record[i].backtrace[q]) + unsigned long bt = lr->backtrace[q]; + if (!bt) break; - if (task->latency_record[i].backtrace[q] == ULONG_MAX) + if (bt == ULONG_MAX) break; - sprint_symbol(sym, task->latency_record[i].backtrace[q]); - c = strchr(sym, '+'); - if (c) - *c = 0; - seq_printf(m, "%s ", sym); + seq_printf(m, " %ps", (void *)bt); } - seq_printf(m, "\n"); + seq_putc(m, '\n'); } } @@ -751,14 +745,7 @@ static int proc_single_show(struct seq_file *m, void *v) static int proc_single_open(struct inode *inode, struct file *filp) { - int ret; - ret = single_open(filp, proc_single_show, NULL); - if (!ret) { - struct seq_file *m = filp->private_data; - - m->private = inode; - } - return ret; + return single_open(filp, proc_single_show, inode); } static const struct file_operations proc_single_file_operations = { @@ -1386,9 +1373,77 @@ sched_write(struct file *file, const char __user *buf, static int sched_open(struct inode *inode, struct file *filp) { + return single_open(filp, sched_show, inode); +} + +static const struct file_operations proc_pid_sched_operations = { + .open = sched_open, + .read = seq_read, + .write = sched_write, + .llseek = seq_lseek, + .release = single_release, +}; + +#endif + +#ifdef CONFIG_SCHED_AUTOGROUP +/* + * Print out autogroup related information: + */ +static int sched_autogroup_show(struct seq_file *m, void *v) +{ + struct inode *inode = m->private; + struct task_struct *p; + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + proc_sched_autogroup_show_task(p, m); + + put_task_struct(p); + + return 0; +} + +static ssize_t +sched_autogroup_write(struct file *file, const char __user *buf, + size_t count, loff_t *offset) +{ + struct inode *inode = file->f_path.dentry->d_inode; + struct task_struct *p; + char buffer[PROC_NUMBUF]; + long nice; + int err; + + memset(buffer, 0, sizeof(buffer)); + if (count > sizeof(buffer) - 1) + count = sizeof(buffer) - 1; + if (copy_from_user(buffer, buf, count)) + return -EFAULT; + + err = strict_strtol(strstrip(buffer), 0, &nice); + if (err) + return -EINVAL; + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + + err = nice; + err = proc_sched_autogroup_set_nice(p, &err); + if (err) + count = err; + + put_task_struct(p); + + return count; +} + +static int sched_autogroup_open(struct inode *inode, struct file *filp) +{ int ret; - ret = single_open(filp, sched_show, NULL); + ret = single_open(filp, sched_autogroup_show, NULL); if (!ret) { struct seq_file *m = filp->private_data; @@ -1397,15 +1452,15 @@ static int sched_open(struct inode *inode, struct file *filp) return ret; } -static const struct file_operations proc_pid_sched_operations = { - .open = sched_open, +static const struct file_operations proc_pid_sched_autogroup_operations = { + .open = sched_autogroup_open, .read = seq_read, - .write = sched_write, + .write = sched_autogroup_write, .llseek = seq_lseek, .release = single_release, }; -#endif +#endif /* CONFIG_SCHED_AUTOGROUP */ static ssize_t comm_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) @@ -1454,15 +1509,7 @@ static int comm_show(struct seq_file *m, void *v) static int comm_open(struct inode *inode, struct file *filp) { - int ret; - - ret = single_open(filp, comm_show, NULL); - if (!ret) { - struct seq_file *m = filp->private_data; - - m->private = inode; - } - return ret; + return single_open(filp, comm_show, inode); } static const struct file_operations proc_pid_set_comm_operations = { @@ -1574,7 +1621,7 @@ static int do_proc_readlink(struct path *path, char __user *buffer, int buflen) if (!tmp) return -ENOMEM; - pathname = d_path_with_unreachable(path, tmp, PAGE_SIZE); + pathname = d_path(path, tmp, PAGE_SIZE); len = PTR_ERR(pathname); if (IS_ERR(pathname)) goto out; @@ -1719,10 +1766,16 @@ static int pid_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat */ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct inode *inode = dentry->d_inode; - struct task_struct *task = get_proc_task(inode); + struct inode *inode; + struct task_struct *task; const struct cred *cred; + if (nd && nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = dentry->d_inode; + task = get_proc_task(inode); + if (task) { if ((inode->i_mode == (S_IFDIR|S_IRUGO|S_IXUGO)) || task_dumpable(task)) { @@ -1744,7 +1797,7 @@ static int pid_revalidate(struct dentry *dentry, struct nameidata *nd) return 0; } -static int pid_delete_dentry(struct dentry * dentry) +static int pid_delete_dentry(const struct dentry * dentry) { /* Is the task we represent dead? * If so, then don't put the dentry on the lru list, @@ -1888,12 +1941,19 @@ static int proc_fd_link(struct inode *inode, struct path *path) static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct inode *inode = dentry->d_inode; - struct task_struct *task = get_proc_task(inode); - int fd = proc_fd(inode); + struct inode *inode; + struct task_struct *task; + int fd; struct files_struct *files; const struct cred *cred; + if (nd && nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = dentry->d_inode; + task = get_proc_task(inode); + fd = proc_fd(inode); + if (task) { files = get_files_struct(task); if (files) { @@ -1969,7 +2029,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir, inode->i_op = &proc_pid_link_inode_operations; inode->i_size = 64; ei->op.proc_get_link = proc_fd_link; - dentry->d_op = &tid_fd_dentry_operations; + d_set_d_op(dentry, &tid_fd_dentry_operations); d_add(dentry, inode); /* Close the race of the process dying before we return the dentry */ if (tid_fd_revalidate(dentry, NULL)) @@ -2101,11 +2161,13 @@ static const struct file_operations proc_fd_operations = { * /proc/pid/fd needs a special permission handler so that a process can still * access /proc/self/fd after it has executed a setuid(). */ -static int proc_fd_permission(struct inode *inode, int mask) +static int proc_fd_permission(struct inode *inode, int mask, unsigned int flags) { int rv; - rv = generic_permission(inode, mask, NULL); + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + rv = generic_permission(inode, mask, flags, NULL); if (rv == 0) return 0; if (task_pid(current) == proc_pid(inode)) @@ -2137,7 +2199,7 @@ static struct dentry *proc_fdinfo_instantiate(struct inode *dir, ei->fd = fd; inode->i_mode = S_IFREG | S_IRUSR; inode->i_fop = &proc_fdinfo_file_operations; - dentry->d_op = &tid_fd_dentry_operations; + d_set_d_op(dentry, &tid_fd_dentry_operations); d_add(dentry, inode); /* Close the race of the process dying before we return the dentry */ if (tid_fd_revalidate(dentry, NULL)) @@ -2196,7 +2258,7 @@ static struct dentry *proc_pident_instantiate(struct inode *dir, if (p->fop) inode->i_fop = p->fop; ei->op = p->op; - dentry->d_op = &pid_dentry_operations; + d_set_d_op(dentry, &pid_dentry_operations); d_add(dentry, inode); /* Close the race of the process dying before we return the dentry */ if (pid_revalidate(dentry, NULL)) @@ -2563,8 +2625,14 @@ static const struct pid_entry proc_base_stuff[] = { */ static int proc_base_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct inode *inode = dentry->d_inode; - struct task_struct *task = get_proc_task(inode); + struct inode *inode; + struct task_struct *task; + + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = dentry->d_inode; + task = get_proc_task(inode); if (task) { put_task_struct(task); return 1; @@ -2615,7 +2683,7 @@ static struct dentry *proc_base_instantiate(struct inode *dir, if (p->fop) inode->i_fop = p->fop; ei->op = p->op; - dentry->d_op = &proc_base_dentry_operations; + d_set_d_op(dentry, &proc_base_dentry_operations); d_add(dentry, inode); error = NULL; out: @@ -2733,6 +2801,9 @@ static const struct pid_entry tgid_base_stuff[] = { #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations), #endif +#ifdef CONFIG_SCHED_AUTOGROUP + REG("autogroup", S_IRUGO|S_IWUSR, proc_pid_sched_autogroup_operations), +#endif REG("comm", S_IRUGO|S_IWUSR, proc_pid_set_comm_operations), #ifdef CONFIG_HAVE_ARCH_TRACEHOOK INF("syscall", S_IRUSR, proc_pid_syscall), @@ -2926,7 +2997,7 @@ static struct dentry *proc_pid_instantiate(struct inode *dir, inode->i_nlink = 2 + pid_entry_count_dirs(tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff)); - dentry->d_op = &pid_dentry_operations; + d_set_d_op(dentry, &pid_dentry_operations); d_add(dentry, inode); /* Close the race of the process dying before we return the dentry */ @@ -3169,7 +3240,7 @@ static struct dentry *proc_task_instantiate(struct inode *dir, inode->i_nlink = 2 + pid_entry_count_dirs(tid_base_stuff, ARRAY_SIZE(tid_base_stuff)); - dentry->d_op = &pid_dentry_operations; + d_set_d_op(dentry, &pid_dentry_operations); d_add(dentry, inode); /* Close the race of the process dying before we return the dentry */ diff --git a/fs/proc/consoles.c b/fs/proc/consoles.c new file mode 100644 index 0000000..eafc22a --- /dev/null +++ b/fs/proc/consoles.c @@ -0,0 +1,114 @@ +/* + * Copyright (c) 2010 Werner Fink, Jiri Slaby + * + * Licensed under GPLv2 + */ + +#include <linux/console.h> +#include <linux/kernel.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/tty_driver.h> + +/* + * This is handler for /proc/consoles + */ +static int show_console_dev(struct seq_file *m, void *v) +{ + static const struct { + short flag; + char name; + } con_flags[] = { + { CON_ENABLED, 'E' }, + { CON_CONSDEV, 'C' }, + { CON_BOOT, 'B' }, + { CON_PRINTBUFFER, 'p' }, + { CON_BRL, 'b' }, + { CON_ANYTIME, 'a' }, + }; + char flags[ARRAY_SIZE(con_flags) + 1]; + struct console *con = v; + unsigned int a; + int len; + dev_t dev = 0; + + if (con->device) { + const struct tty_driver *driver; + int index; + driver = con->device(con, &index); + if (driver) { + dev = MKDEV(driver->major, driver->minor_start); + dev += index; + } + } + + for (a = 0; a < ARRAY_SIZE(con_flags); a++) + flags[a] = (con->flags & con_flags[a].flag) ? + con_flags[a].name : ' '; + flags[a] = 0; + + seq_printf(m, "%s%d%n", con->name, con->index, &len); + len = 21 - len; + if (len < 1) + len = 1; + seq_printf(m, "%*c%c%c%c (%s)", len, ' ', con->read ? 'R' : '-', + con->write ? 'W' : '-', con->unblank ? 'U' : '-', + flags); + if (dev) + seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev)); + + seq_printf(m, "\n"); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + struct console *con; + loff_t off = 0; + + acquire_console_sem(); + for_each_console(con) + if (off++ == *pos) + break; + + return con; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + struct console *con = v; + ++*pos; + return con->next; +} + +static void c_stop(struct seq_file *m, void *v) +{ + release_console_sem(); +} + +static const struct seq_operations consoles_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_console_dev +}; + +static int consoles_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &consoles_op); +} + +static const struct file_operations proc_consoles_operations = { + .open = consoles_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static int __init proc_consoles_init(void) +{ + proc_create("consoles", 0, NULL, &proc_consoles_operations); + return 0; +} +module_init(proc_consoles_init); diff --git a/fs/proc/devices.c b/fs/proc/devices.c index 59ee7da..b143471 100644 --- a/fs/proc/devices.c +++ b/fs/proc/devices.c @@ -9,14 +9,14 @@ static int devinfo_show(struct seq_file *f, void *v) if (i < CHRDEV_MAJOR_HASH_SIZE) { if (i == 0) - seq_printf(f, "Character devices:\n"); + seq_puts(f, "Character devices:\n"); chrdev_show(f, i); } #ifdef CONFIG_BLOCK else { i -= CHRDEV_MAJOR_HASH_SIZE; if (i == 0) - seq_printf(f, "\nBlock devices:\n"); + seq_puts(f, "\nBlock devices:\n"); blkdev_show(f, i); } #endif diff --git a/fs/proc/generic.c b/fs/proc/generic.c index dd29f03..01e07f2 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -400,7 +400,7 @@ static const struct inode_operations proc_link_inode_operations = { * smarter: we could keep a "volatile" flag in the * inode to indicate which ones to keep. */ -static int proc_delete_dentry(struct dentry * dentry) +static int proc_delete_dentry(const struct dentry * dentry) { return 1; } @@ -425,13 +425,10 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir, if (de->namelen != dentry->d_name.len) continue; if (!memcmp(dentry->d_name.name, de->name, de->namelen)) { - unsigned int ino; - - ino = de->low_ino; pde_get(de); spin_unlock(&proc_subdir_lock); error = -EINVAL; - inode = proc_get_inode(dir->i_sb, ino, de); + inode = proc_get_inode(dir->i_sb, de); goto out_unlock; } } @@ -439,7 +436,7 @@ struct dentry *proc_lookup_de(struct proc_dir_entry *de, struct inode *dir, out_unlock: if (inode) { - dentry->d_op = &proc_dentry_operations; + d_set_d_op(dentry, &proc_dentry_operations); d_add(dentry, inode); return NULL; } @@ -768,12 +765,7 @@ EXPORT_SYMBOL(proc_create_data); static void free_proc_entry(struct proc_dir_entry *de) { - unsigned int ino = de->low_ino; - - if (ino < PROC_DYNAMIC_FIRST) - return; - - release_inode_number(ino); + release_inode_number(de->low_ino); if (S_ISLNK(de->mode)) kfree(de->data); @@ -834,12 +826,9 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent) wait_for_completion(de->pde_unload_completion); - goto continue_removing; + spin_lock(&de->pde_unload_lock); } - spin_unlock(&de->pde_unload_lock); -continue_removing: - spin_lock(&de->pde_unload_lock); while (!list_empty(&de->pde_openers)) { struct pde_opener *pdeo; diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 9c2b5f4..176ce4c 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -16,7 +16,6 @@ #include <linux/limits.h> #include <linux/init.h> #include <linux/module.h> -#include <linux/smp_lock.h> #include <linux/sysctl.h> #include <linux/slab.h> @@ -66,11 +65,18 @@ static struct inode *proc_alloc_inode(struct super_block *sb) return inode; } -static void proc_destroy_inode(struct inode *inode) +static void proc_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(proc_inode_cachep, PROC_I(inode)); } +static void proc_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, proc_i_callback); +} + static void init_once(void *foo) { struct proc_inode *ei = (struct proc_inode *) foo; @@ -410,12 +416,11 @@ static const struct file_operations proc_reg_file_ops_no_compat = { }; #endif -struct inode *proc_get_inode(struct super_block *sb, unsigned int ino, - struct proc_dir_entry *de) +struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de) { struct inode * inode; - inode = iget_locked(sb, ino); + inode = iget_locked(sb, de->low_ino); if (!inode) return NULL; if (inode->i_state & I_NEW) { @@ -465,7 +470,7 @@ int proc_fill_super(struct super_block *s) s->s_time_gran = 1; pde_get(&proc_root); - root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root); + root_inode = proc_get_inode(s, &proc_root); if (!root_inode) goto out_no_root; root_inode->i_uid = 0; diff --git a/fs/proc/internal.h b/fs/proc/internal.h index 1f24a3e..9ad561d 100644 --- a/fs/proc/internal.h +++ b/fs/proc/internal.h @@ -96,7 +96,8 @@ extern spinlock_t proc_subdir_lock; struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *); int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir); unsigned long task_vsize(struct mm_struct *); -int task_statm(struct mm_struct *, int *, int *, int *, int *); +unsigned long task_statm(struct mm_struct *, + unsigned long *, unsigned long *, unsigned long *, unsigned long *); void task_mem(struct seq_file *, struct mm_struct *); static inline struct proc_dir_entry *pde_get(struct proc_dir_entry *pde) @@ -108,7 +109,7 @@ void pde_put(struct proc_dir_entry *pde); extern struct vfsmount *proc_mnt; int proc_fill_super(struct super_block *); -struct inode *proc_get_inode(struct super_block *, unsigned int, struct proc_dir_entry *); +struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *); /* * These are generic /proc routines that use the internal diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 6f37c39..d245cb2 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -558,7 +558,7 @@ static int open_kcore(struct inode *inode, struct file *filp) static const struct file_operations proc_kcore_operations = { .read = read_kcore, .open = open_kcore, - .llseek = generic_file_llseek, + .llseek = default_llseek, }; #ifdef CONFIG_MEMORY_HOTPLUG diff --git a/fs/proc/page.c b/fs/proc/page.c index 3b8b4566..b06c674 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -40,7 +40,7 @@ static ssize_t kpagecount_read(struct file *file, char __user *buf, ppage = pfn_to_page(pfn); else ppage = NULL; - if (!ppage) + if (!ppage || PageSlab(ppage)) pcount = 0; else pcount = page_mapcount(ppage); diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c index b652cb0..09a1f92 100644 --- a/fs/proc/proc_sysctl.c +++ b/fs/proc/proc_sysctl.c @@ -5,6 +5,7 @@ #include <linux/sysctl.h> #include <linux/proc_fs.h> #include <linux/security.h> +#include <linux/namei.h> #include "internal.h" static const struct dentry_operations proc_sys_dentry_operations; @@ -120,7 +121,7 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry, goto out; err = NULL; - dentry->d_op = &proc_sys_dentry_operations; + d_set_d_op(dentry, &proc_sys_dentry_operations); d_add(dentry, inode); out: @@ -201,7 +202,7 @@ static int proc_sys_fill_cache(struct file *filp, void *dirent, dput(child); return -ENOMEM; } else { - child->d_op = &proc_sys_dentry_operations; + d_set_d_op(child, &proc_sys_dentry_operations); d_add(child, inode); } } else { @@ -294,7 +295,7 @@ out: return ret; } -static int proc_sys_permission(struct inode *inode, int mask) +static int proc_sys_permission(struct inode *inode, int mask,unsigned int flags) { /* * sysctl entries that are not writeable, @@ -304,6 +305,9 @@ static int proc_sys_permission(struct inode *inode, int mask) struct ctl_table *table; int error; + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + /* Executable files are not allowed under /proc/sys/ */ if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) return -EACCES; @@ -389,23 +393,30 @@ static const struct inode_operations proc_sys_dir_operations = { static int proc_sys_revalidate(struct dentry *dentry, struct nameidata *nd) { + if (nd->flags & LOOKUP_RCU) + return -ECHILD; return !PROC_I(dentry->d_inode)->sysctl->unregistering; } -static int proc_sys_delete(struct dentry *dentry) +static int proc_sys_delete(const struct dentry *dentry) { return !!PROC_I(dentry->d_inode)->sysctl->unregistering; } -static int proc_sys_compare(struct dentry *dir, struct qstr *qstr, - struct qstr *name) +static int proc_sys_compare(const struct dentry *parent, + const struct inode *pinode, + const struct dentry *dentry, const struct inode *inode, + unsigned int len, const char *str, const struct qstr *name) { - struct dentry *dentry = container_of(qstr, struct dentry, d_name); - if (qstr->len != name->len) + /* Although proc doesn't have negative dentries, rcu-walk means + * that inode here can be NULL */ + if (!inode) + return 0; + if (name->len != len) return 1; - if (memcmp(qstr->name, name->name, name->len)) + if (memcmp(name->name, str, len)) return 1; - return !sysctl_is_seen(PROC_I(dentry->d_inode)->sysctl); + return !sysctl_is_seen(PROC_I(inode)->sysctl); } static const struct dentry_operations proc_sys_dentry_operations = { diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c index 83adcc8..cb761f0 100644 --- a/fs/proc/proc_tty.c +++ b/fs/proc/proc_tty.c @@ -36,27 +36,27 @@ static void show_tty_range(struct seq_file *m, struct tty_driver *p, } switch (p->type) { case TTY_DRIVER_TYPE_SYSTEM: - seq_printf(m, "system"); + seq_puts(m, "system"); if (p->subtype == SYSTEM_TYPE_TTY) - seq_printf(m, ":/dev/tty"); + seq_puts(m, ":/dev/tty"); else if (p->subtype == SYSTEM_TYPE_SYSCONS) - seq_printf(m, ":console"); + seq_puts(m, ":console"); else if (p->subtype == SYSTEM_TYPE_CONSOLE) - seq_printf(m, ":vtmaster"); + seq_puts(m, ":vtmaster"); break; case TTY_DRIVER_TYPE_CONSOLE: - seq_printf(m, "console"); + seq_puts(m, "console"); break; case TTY_DRIVER_TYPE_SERIAL: - seq_printf(m, "serial"); + seq_puts(m, "serial"); break; case TTY_DRIVER_TYPE_PTY: if (p->subtype == PTY_TYPE_MASTER) - seq_printf(m, "pty:master"); + seq_puts(m, "pty:master"); else if (p->subtype == PTY_TYPE_SLAVE) - seq_printf(m, "pty:slave"); + seq_puts(m, "pty:slave"); else - seq_printf(m, "pty"); + seq_puts(m, "pty"); break; default: seq_printf(m, "type:%d.%d", p->type, p->subtype); @@ -74,19 +74,19 @@ static int show_tty_driver(struct seq_file *m, void *v) /* pseudo-drivers first */ seq_printf(m, "%-20s /dev/%-8s ", "/dev/tty", "tty"); seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 0); - seq_printf(m, "system:/dev/tty\n"); + seq_puts(m, "system:/dev/tty\n"); seq_printf(m, "%-20s /dev/%-8s ", "/dev/console", "console"); seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 1); - seq_printf(m, "system:console\n"); + seq_puts(m, "system:console\n"); #ifdef CONFIG_UNIX98_PTYS seq_printf(m, "%-20s /dev/%-8s ", "/dev/ptmx", "ptmx"); seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 2); - seq_printf(m, "system\n"); + seq_puts(m, "system\n"); #endif #ifdef CONFIG_VT seq_printf(m, "%-20s /dev/%-8s ", "/dev/vc/0", "vc/0"); seq_printf(m, "%3d %7d ", TTY_MAJOR, 0); - seq_printf(m, "system:vtmaster\n"); + seq_puts(m, "system:vtmaster\n"); #endif } diff --git a/fs/proc/root.c b/fs/proc/root.c index 93d99b3..ef9fa8e 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -35,8 +35,8 @@ static int proc_set_super(struct super_block *sb, void *data) return set_anon_super(sb, NULL); } -static int proc_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *proc_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { int err; struct super_block *sb; @@ -61,14 +61,14 @@ static int proc_get_sb(struct file_system_type *fs_type, sb = sget(fs_type, proc_test_super, proc_set_super, ns); if (IS_ERR(sb)) - return PTR_ERR(sb); + return ERR_CAST(sb); if (!sb->s_root) { sb->s_flags = flags; err = proc_fill_super(sb); if (err) { deactivate_locked_super(sb); - return err; + return ERR_PTR(err); } ei = PROC_I(sb->s_root->d_inode); @@ -79,11 +79,9 @@ static int proc_get_sb(struct file_system_type *fs_type, } sb->s_flags |= MS_ACTIVE; - ns->proc_mnt = mnt; } - simple_set_mnt(mnt, sb); - return 0; + return dget(sb->s_root); } static void proc_kill_sb(struct super_block *sb) @@ -97,7 +95,7 @@ static void proc_kill_sb(struct super_block *sb) static struct file_system_type proc_fs_type = { .name = "proc", - .get_sb = proc_get_sb, + .mount = proc_mount, .kill_sb = proc_kill_sb, }; @@ -115,6 +113,7 @@ void __init proc_root_init(void) return; } + init_pid_ns.proc_mnt = proc_mnt; proc_symlink("mounts", NULL, "self/mounts"); proc_net_init(); @@ -213,6 +212,7 @@ int pid_ns_prepare_proc(struct pid_namespace *ns) if (IS_ERR(mnt)) return PTR_ERR(mnt); + ns->proc_mnt = mnt; return 0; } diff --git a/fs/proc/softirqs.c b/fs/proc/softirqs.c index 3799473..62604be 100644 --- a/fs/proc/softirqs.c +++ b/fs/proc/softirqs.c @@ -10,16 +10,16 @@ static int show_softirqs(struct seq_file *p, void *v) { int i, j; - seq_printf(p, " "); + seq_puts(p, " "); for_each_possible_cpu(i) seq_printf(p, "CPU%-8d", i); - seq_printf(p, "\n"); + seq_putc(p, '\n'); for (i = 0; i < NR_SOFTIRQS; i++) { seq_printf(p, "%12s:", softirq_to_name[i]); for_each_possible_cpu(j) seq_printf(p, " %10u", kstat_softirqs_cpu(i, j)); - seq_printf(p, "\n"); + seq_putc(p, '\n'); } return 0; } diff --git a/fs/proc/stat.c b/fs/proc/stat.c index e15a19c..1cffa2b 100644 --- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -126,7 +126,7 @@ static int show_stat(struct seq_file *p, void *v) for (i = 0; i < NR_SOFTIRQS; i++) seq_printf(p, " %u", per_softirq_sums[i]); - seq_printf(p, "\n"); + seq_putc(p, '\n'); return 0; } diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index da6b01d..c3755bd 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -66,8 +66,9 @@ unsigned long task_vsize(struct mm_struct *mm) return PAGE_SIZE * mm->total_vm; } -int task_statm(struct mm_struct *mm, int *shared, int *text, - int *data, int *resident) +unsigned long task_statm(struct mm_struct *mm, + unsigned long *shared, unsigned long *text, + unsigned long *data, unsigned long *resident) { *shared = get_mm_counter(mm, MM_FILEPAGES); *text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) @@ -706,6 +707,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask, * skip over unmapped regions. */ #define PAGEMAP_WALK_SIZE (PMD_SIZE) +#define PAGEMAP_WALK_MASK (PMD_MASK) static ssize_t pagemap_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { @@ -776,7 +778,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf, unsigned long end; pm.pos = 0; - end = start_vaddr + PAGEMAP_WALK_SIZE; + end = (start_vaddr + PAGEMAP_WALK_SIZE) & PAGEMAP_WALK_MASK; /* overflow ? */ if (end < start_vaddr || end > end_vaddr) end = end_vaddr; diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c index cb6306e..b535d3e 100644 --- a/fs/proc/task_nommu.c +++ b/fs/proc/task_nommu.c @@ -92,13 +92,14 @@ unsigned long task_vsize(struct mm_struct *mm) return vsize; } -int task_statm(struct mm_struct *mm, int *shared, int *text, - int *data, int *resident) +unsigned long task_statm(struct mm_struct *mm, + unsigned long *shared, unsigned long *text, + unsigned long *data, unsigned long *resident) { struct vm_area_struct *vma; struct vm_region *region; struct rb_node *p; - int size = kobjsize(mm); + unsigned long size = kobjsize(mm); down_read(&mm->mmap_sem); for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 2367fb3..74802bc5 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -499,7 +499,7 @@ static int __init parse_crash_elf64_headers(void) /* Do some basic Verification. */ if (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0 || (ehdr.e_type != ET_CORE) || - !vmcore_elf_check_arch(&ehdr) || + !vmcore_elf64_check_arch(&ehdr) || ehdr.e_ident[EI_CLASS] != ELFCLASS64 || ehdr.e_ident[EI_VERSION] != EV_CURRENT || ehdr.e_version != EV_CURRENT || diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c index 01bad30..e63b417 100644 --- a/fs/qnx4/inode.c +++ b/fs/qnx4/inode.c @@ -425,11 +425,18 @@ static struct inode *qnx4_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void qnx4_destroy_inode(struct inode *inode) +static void qnx4_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode)); } +static void qnx4_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, qnx4_i_callback); +} + static void init_once(void *foo) { struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo; @@ -454,17 +461,16 @@ static void destroy_inodecache(void) kmem_cache_destroy(qnx4_inode_cachep); } -static int qnx4_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *qnx4_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, qnx4_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, qnx4_fill_super); } static struct file_system_type qnx4_fs_type = { .owner = THIS_MODULE, .name = "qnx4", - .get_sb = qnx4_get_sb, + .mount = qnx4_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 0fed41e..84becd3 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -133,16 +133,20 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(dq_data_lock); EXPORT_SYMBOL(dq_data_lock); void __quota_error(struct super_block *sb, const char *func, - const char *fmt, ...) + const char *fmt, ...) { - va_list args; - if (printk_ratelimit()) { + va_list args; + struct va_format vaf; + va_start(args, fmt); - printk(KERN_ERR "Quota error (device %s): %s: ", - sb->s_id, func); - vprintk(fmt, args); - printk("\n"); + + vaf.fmt = fmt; + vaf.va = &args; + + printk(KERN_ERR "Quota error (device %s): %s: %pV\n", + sb->s_id, func, &vaf); + va_end(args); } } diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c index 9e48874..e41c1becf 100644 --- a/fs/quota/quota_tree.c +++ b/fs/quota/quota_tree.c @@ -468,8 +468,8 @@ static int remove_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot, return -ENOMEM; ret = read_blk(info, *blk, buf); if (ret < 0) { - quota_error(dquot->dq_sb, "Can't read quota data " - "block %u", blk); + quota_error(dquot->dq_sb, "Can't read quota data block %u", + *blk); goto out_buf; } newblk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]); @@ -493,8 +493,9 @@ static int remove_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot, } else { ret = write_blk(info, *blk, buf); if (ret < 0) - quota_error(dquot->dq_sb, "Can't write quota " - "tree block %u", blk); + quota_error(dquot->dq_sb, + "Can't write quota tree block %u", + *blk); } } out_buf: diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index 67fadb1..eacb166 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -255,17 +255,16 @@ fail: return err; } -int ramfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +struct dentry *ramfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags, data, ramfs_fill_super, mnt); + return mount_nodev(fs_type, flags, data, ramfs_fill_super); } -static int rootfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *rootfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_nodev(fs_type, flags|MS_NOUSER, data, ramfs_fill_super, - mnt); + return mount_nodev(fs_type, flags|MS_NOUSER, data, ramfs_fill_super); } static void ramfs_kill_sb(struct super_block *sb) @@ -276,12 +275,12 @@ static void ramfs_kill_sb(struct super_block *sb) static struct file_system_type ramfs_fs_type = { .name = "ramfs", - .get_sb = ramfs_get_sb, + .mount = ramfs_mount, .kill_sb = ramfs_kill_sb, }; static struct file_system_type rootfs_fs_type = { .name = "rootfs", - .get_sb = rootfs_get_sb, + .mount = rootfs_mount, .kill_sb = kill_litter_super, }; diff --git a/fs/read_write.c b/fs/read_write.c index 9cd9d14..5d431ba 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -9,7 +9,6 @@ #include <linux/fcntl.h> #include <linux/file.h> #include <linux/uio.h> -#include <linux/smp_lock.h> #include <linux/fsnotify.h> #include <linux/security.h> #include <linux/module.h> @@ -243,8 +242,6 @@ bad: * them to something that fits in "int" so that others * won't have to do range checks all the time. */ -#define MAX_RW_COUNT (INT_MAX & PAGE_CACHE_MASK) - int rw_verify_area(int read_write, struct file *file, loff_t *ppos, size_t count) { struct inode *inode; @@ -584,65 +581,71 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector, unsigned long nr_segs, unsigned long fast_segs, struct iovec *fast_pointer, struct iovec **ret_pointer) - { +{ unsigned long seg; - ssize_t ret; + ssize_t ret; struct iovec *iov = fast_pointer; - /* - * SuS says "The readv() function *may* fail if the iovcnt argument - * was less than or equal to 0, or greater than {IOV_MAX}. Linux has - * traditionally returned zero for zero segments, so... - */ + /* + * SuS says "The readv() function *may* fail if the iovcnt argument + * was less than or equal to 0, or greater than {IOV_MAX}. Linux has + * traditionally returned zero for zero segments, so... + */ if (nr_segs == 0) { ret = 0; - goto out; + goto out; } - /* - * First get the "struct iovec" from user memory and - * verify all the pointers - */ + /* + * First get the "struct iovec" from user memory and + * verify all the pointers + */ if (nr_segs > UIO_MAXIOV) { ret = -EINVAL; - goto out; + goto out; } if (nr_segs > fast_segs) { - iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); + iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); if (iov == NULL) { ret = -ENOMEM; - goto out; + goto out; } - } + } if (copy_from_user(iov, uvector, nr_segs*sizeof(*uvector))) { ret = -EFAULT; - goto out; + goto out; } - /* + /* * According to the Single Unix Specification we should return EINVAL * if an element length is < 0 when cast to ssize_t or if the * total length would overflow the ssize_t return value of the * system call. - */ + * + * Linux caps all read/write calls to MAX_RW_COUNT, and avoids the + * overflow case. + */ ret = 0; - for (seg = 0; seg < nr_segs; seg++) { - void __user *buf = iov[seg].iov_base; - ssize_t len = (ssize_t)iov[seg].iov_len; + for (seg = 0; seg < nr_segs; seg++) { + void __user *buf = iov[seg].iov_base; + ssize_t len = (ssize_t)iov[seg].iov_len; /* see if we we're about to use an invalid len or if * it's about to overflow ssize_t */ - if (len < 0 || (ret + len < ret)) { + if (len < 0) { ret = -EINVAL; - goto out; + goto out; } if (unlikely(!access_ok(vrfy_dir(type), buf, len))) { ret = -EFAULT; - goto out; + goto out; + } + if (len > MAX_RW_COUNT - ret) { + len = MAX_RW_COUNT - ret; + iov[seg].iov_len = len; } - ret += len; - } + } out: *ret_pointer = iov; return ret; diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index 41656d4..0bae036 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -8,7 +8,6 @@ #include <linux/reiserfs_acl.h> #include <linux/reiserfs_xattr.h> #include <linux/exportfs.h> -#include <linux/smp_lock.h> #include <linux/pagemap.h> #include <linux/highmem.h> #include <linux/slab.h> diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c index adf22b4..79265fd 100644 --- a/fs/reiserfs/ioctl.c +++ b/fs/reiserfs/ioctl.c @@ -9,7 +9,6 @@ #include <linux/time.h> #include <asm/uaccess.h> #include <linux/pagemap.h> -#include <linux/smp_lock.h> #include <linux/compat.h> /* @@ -184,12 +183,11 @@ int reiserfs_unpack(struct inode *inode, struct file *filp) return 0; } - /* we need to make sure nobody is changing the file size beneath - ** us - */ - reiserfs_mutex_lock_safe(&inode->i_mutex, inode->i_sb); depth = reiserfs_write_lock_once(inode->i_sb); + /* we need to make sure nobody is changing the file size beneath us */ + reiserfs_mutex_lock_safe(&inode->i_mutex, inode->i_sb); + write_from = inode->i_size & (blocksize - 1); /* if we are on a block boundary, we are already unpacked. */ if (write_from == 0) { diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c index 076c8b1..d31bce1 100644 --- a/fs/reiserfs/journal.c +++ b/fs/reiserfs/journal.c @@ -43,7 +43,6 @@ #include <linux/fcntl.h> #include <linux/stat.h> #include <linux/string.h> -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include <linux/workqueue.h> #include <linux/writeback.h> diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c index adbc6f5..45de98b 100644 --- a/fs/reiserfs/prints.c +++ b/fs/reiserfs/prints.c @@ -586,13 +586,13 @@ void print_block(struct buffer_head *bh, ...) //int print_mode, int first, int l va_list args; int mode, first, last; - va_start(args, bh); - if (!bh) { printk("print_block: buffer is NULL\n"); return; } + va_start(args, bh); + mode = va_arg(args, int); first = va_arg(args, int); last = va_arg(args, int); diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index e15ff612..2575682 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -28,7 +28,6 @@ #include <linux/mount.h> #include <linux/namei.h> #include <linux/crc32.h> -#include <linux/smp_lock.h> struct file_system_type reiserfs_fs_type; @@ -530,11 +529,18 @@ static struct inode *reiserfs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void reiserfs_destroy_inode(struct inode *inode) +static void reiserfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode)); } +static void reiserfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, reiserfs_i_callback); +} + static void init_once(void *foo) { struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo; @@ -2213,12 +2219,11 @@ out: #endif -static int get_super_block(struct file_system_type *fs_type, +static struct dentry *get_super_block(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super); } static int __init init_reiserfs_fs(void) @@ -2253,7 +2258,7 @@ static void __exit exit_reiserfs_fs(void) struct file_system_type reiserfs_fs_type = { .owner = THIS_MODULE, .name = "reiserfs", - .get_sb = get_super_block, + .mount = get_super_block, .kill_sb = reiserfs_kill_sb, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index 5d04a78..3cfb2e9 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -870,11 +870,14 @@ out: return err; } -static int reiserfs_check_acl(struct inode *inode, int mask) +static int reiserfs_check_acl(struct inode *inode, int mask, unsigned int flags) { struct posix_acl *acl; int error = -EAGAIN; /* do regular unix permission checks by default */ + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + acl = reiserfs_get_acl(inode, ACL_TYPE_ACCESS); if (acl) { @@ -951,8 +954,10 @@ static int xattr_mount_check(struct super_block *s) return 0; } -int reiserfs_permission(struct inode *inode, int mask) +int reiserfs_permission(struct inode *inode, int mask, unsigned int flags) { + if (flags & IPERM_FLAG_RCU) + return -ECHILD; /* * We don't do permission checks on the internal objects. * Permissions are determined by the "owning" object. @@ -965,13 +970,16 @@ int reiserfs_permission(struct inode *inode, int mask) * Stat data v1 doesn't support ACLs. */ if (get_inode_sd_version(inode) != STAT_DATA_V1) - return generic_permission(inode, mask, reiserfs_check_acl); + return generic_permission(inode, mask, flags, + reiserfs_check_acl); #endif - return generic_permission(inode, mask, NULL); + return generic_permission(inode, mask, flags, NULL); } static int xattr_hide_revalidate(struct dentry *dentry, struct nameidata *nd) { + if (nd->flags & LOOKUP_RCU) + return -ECHILD; return -EPERM; } @@ -990,7 +998,7 @@ int reiserfs_lookup_privroot(struct super_block *s) strlen(PRIVROOT_NAME)); if (!IS_ERR(dentry)) { REISERFS_SB(s)->priv_root = dentry; - dentry->d_op = &xattr_lookup_poison_ops; + d_set_d_op(dentry, &xattr_lookup_poison_ops); if (dentry->d_inode) dentry->d_inode->i_flags |= S_PRIVATE; } else diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index 536d697..90d2fcb 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -472,7 +472,9 @@ int reiserfs_acl_chmod(struct inode *inode) struct reiserfs_transaction_handle th; size_t size = reiserfs_xattr_nblocks(inode, reiserfs_acl_size(clone->a_count)); - reiserfs_write_lock(inode->i_sb); + int depth; + + depth = reiserfs_write_lock_once(inode->i_sb); error = journal_begin(&th, inode->i_sb, size * 2); if (!error) { int error2; @@ -482,7 +484,7 @@ int reiserfs_acl_chmod(struct inode *inode) if (error2) error = error2; } - reiserfs_write_unlock(inode->i_sb); + reiserfs_write_unlock_once(inode->i_sb, depth); } posix_acl_release(clone); return error; diff --git a/fs/romfs/super.c b/fs/romfs/super.c index 2685805..2305e31 100644 --- a/fs/romfs/super.c +++ b/fs/romfs/super.c @@ -400,11 +400,18 @@ static struct inode *romfs_alloc_inode(struct super_block *sb) /* * return a spent inode to the slab cache */ -static void romfs_destroy_inode(struct inode *inode) +static void romfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode)); } +static void romfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, romfs_i_callback); +} + /* * get filesystem statistics */ @@ -552,20 +559,19 @@ error_rsb: /* * get a superblock for mounting */ -static int romfs_get_sb(struct file_system_type *fs_type, +static struct dentry *romfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, struct vfsmount *mnt) + void *data) { - int ret = -EINVAL; + struct dentry *ret = ERR_PTR(-EINVAL); #ifdef CONFIG_ROMFS_ON_MTD - ret = get_sb_mtd(fs_type, flags, dev_name, data, romfs_fill_super, - mnt); + ret = mount_mtd(fs_type, flags, dev_name, data, romfs_fill_super); #endif #ifdef CONFIG_ROMFS_ON_BLOCK - if (ret == -EINVAL) - ret = get_sb_bdev(fs_type, flags, dev_name, data, - romfs_fill_super, mnt); + if (ret == ERR_PTR(-EINVAL)) + ret = mount_bdev(fs_type, flags, dev_name, data, + romfs_fill_super); #endif return ret; } @@ -592,7 +598,7 @@ static void romfs_kill_sb(struct super_block *sb) static struct file_system_type romfs_fs_type = { .owner = THIS_MODULE, .name = "romfs", - .get_sb = romfs_get_sb, + .mount = romfs_mount, .kill_sb = romfs_kill_sb, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/select.c b/fs/select.c index b7b10aa..e56560d 100644 --- a/fs/select.c +++ b/fs/select.c @@ -306,6 +306,8 @@ static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, rts.tv_sec = rts.tv_nsec = 0; if (timeval) { + if (sizeof(rtv) > sizeof(rtv.tv_sec) + sizeof(rtv.tv_usec)) + memset(&rtv, 0, sizeof(rtv)); rtv.tv_sec = rts.tv_sec; rtv.tv_usec = rts.tv_nsec / NSEC_PER_USEC; diff --git a/fs/smbfs/Kconfig b/fs/smbfs/Kconfig deleted file mode 100644 index 2bc24a8..0000000 --- a/fs/smbfs/Kconfig +++ /dev/null @@ -1,56 +0,0 @@ -config SMB_FS - tristate "SMB file system support (OBSOLETE, please use CIFS)" - depends on BKL # probably unfixable - depends on INET - select NLS - help - SMB (Server Message Block) is the protocol Windows for Workgroups - (WfW), Windows 95/98, Windows NT and OS/2 Lan Manager use to share - files and printers over local networks. Saying Y here allows you to - mount their file systems (often called "shares" in this context) and - access them just like any other Unix directory. Currently, this - works only if the Windows machines use TCP/IP as the underlying - transport protocol, and not NetBEUI. For details, read - <file:Documentation/filesystems/smbfs.txt> and the SMB-HOWTO, - available from <http://www.tldp.org/docs.html#howto>. - - Note: if you just want your box to act as an SMB *server* and make - files and printing services available to Windows clients (which need - to have a TCP/IP stack), you don't need to say Y here; you can use - the program SAMBA (available from <ftp://ftp.samba.org/pub/samba/>) - for that. - - General information about how to connect Linux, Windows machines and - Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>. - - To compile the SMB support as a module, choose M here: - the module will be called smbfs. Most people say N, however. - -config SMB_NLS_DEFAULT - bool "Use a default NLS" - depends on SMB_FS - help - Enabling this will make smbfs use nls translations by default. You - need to specify the local charset (CONFIG_NLS_DEFAULT) in the nls - settings and you need to give the default nls for the SMB server as - CONFIG_SMB_NLS_REMOTE. - - The nls settings can be changed at mount time, if your smbmount - supports that, using the codepage and iocharset parameters. - - smbmount from samba 2.2.0 or later supports this. - -config SMB_NLS_REMOTE - string "Default Remote NLS Option" - depends on SMB_NLS_DEFAULT - default "cp437" - help - This setting allows you to specify a default value for which - codepage the server uses. If this field is left blank no - translations will be done by default. The local codepage/charset - default to CONFIG_NLS_DEFAULT. - - The nls settings can be changed at mount time, if your smbmount - supports that, using the codepage and iocharset parameters. - - smbmount from samba 2.2.0 or later supports this. diff --git a/fs/smbfs/Makefile b/fs/smbfs/Makefile deleted file mode 100644 index 4faf8c4..0000000 --- a/fs/smbfs/Makefile +++ /dev/null @@ -1,18 +0,0 @@ -# -# Makefile for the linux smb-filesystem routines. -# - -obj-$(CONFIG_SMB_FS) += smbfs.o - -smbfs-objs := proc.o dir.o cache.o sock.o inode.o file.o ioctl.o getopt.o \ - symlink.o smbiod.o request.o - -# If you want debugging output, you may add these flags to the EXTRA_CFLAGS -# SMBFS_PARANOIA should normally be enabled. - -EXTRA_CFLAGS += -DSMBFS_PARANOIA -#EXTRA_CFLAGS += -DSMBFS_DEBUG -#EXTRA_CFLAGS += -DSMBFS_DEBUG_VERBOSE -#EXTRA_CFLAGS += -DDEBUG_SMB_TIMESTAMP -#EXTRA_CFLAGS += -Werror - diff --git a/fs/smbfs/cache.c b/fs/smbfs/cache.c deleted file mode 100644 index 8c177eb..0000000 --- a/fs/smbfs/cache.c +++ /dev/null @@ -1,208 +0,0 @@ -/* - * cache.c - * - * Copyright (C) 1997 by Bill Hawes - * - * Routines to support directory cacheing using the page cache. - * This cache code is almost directly taken from ncpfs. - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/time.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/smb_fs.h> -#include <linux/pagemap.h> -#include <linux/net.h> - -#include <asm/page.h> - -#include "smb_debug.h" -#include "proto.h" - -/* - * Force the next attempt to use the cache to be a timeout. - * If we can't find the page that's fine, it will cause a refresh. - */ -void -smb_invalid_dir_cache(struct inode * dir) -{ - struct smb_sb_info *server = server_from_inode(dir); - union smb_dir_cache *cache = NULL; - struct page *page = NULL; - - page = grab_cache_page(&dir->i_data, 0); - if (!page) - goto out; - - if (!PageUptodate(page)) - goto out_unlock; - - cache = kmap(page); - cache->head.time = jiffies - SMB_MAX_AGE(server); - - kunmap(page); - SetPageUptodate(page); -out_unlock: - unlock_page(page); - page_cache_release(page); -out: - return; -} - -/* - * Mark all dentries for 'parent' as invalid, forcing them to be re-read - */ -void -smb_invalidate_dircache_entries(struct dentry *parent) -{ - struct smb_sb_info *server = server_from_dentry(parent); - struct list_head *next; - struct dentry *dentry; - - spin_lock(&dcache_lock); - next = parent->d_subdirs.next; - while (next != &parent->d_subdirs) { - dentry = list_entry(next, struct dentry, d_u.d_child); - dentry->d_fsdata = NULL; - smb_age_dentry(server, dentry); - next = next->next; - } - spin_unlock(&dcache_lock); -} - -/* - * dget, but require that fpos and parent matches what the dentry contains. - * dentry is not known to be a valid pointer at entry. - */ -struct dentry * -smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) -{ - struct dentry *dent = dentry; - struct list_head *next; - - if (d_validate(dent, parent)) { - if (dent->d_name.len <= SMB_MAXNAMELEN && - (unsigned long)dent->d_fsdata == fpos) { - if (!dent->d_inode) { - dput(dent); - dent = NULL; - } - return dent; - } - dput(dent); - } - - /* If a pointer is invalid, we search the dentry. */ - spin_lock(&dcache_lock); - next = parent->d_subdirs.next; - while (next != &parent->d_subdirs) { - dent = list_entry(next, struct dentry, d_u.d_child); - if ((unsigned long)dent->d_fsdata == fpos) { - if (dent->d_inode) - dget_locked(dent); - else - dent = NULL; - goto out_unlock; - } - next = next->next; - } - dent = NULL; -out_unlock: - spin_unlock(&dcache_lock); - return dent; -} - - -/* - * Create dentry/inode for this file and add it to the dircache. - */ -int -smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir, - struct smb_cache_control *ctrl, struct qstr *qname, - struct smb_fattr *entry) -{ - struct dentry *newdent, *dentry = filp->f_path.dentry; - struct inode *newino, *inode = dentry->d_inode; - struct smb_cache_control ctl = *ctrl; - int valid = 0; - int hashed = 0; - ino_t ino = 0; - - qname->hash = full_name_hash(qname->name, qname->len); - - if (dentry->d_op && dentry->d_op->d_hash) - if (dentry->d_op->d_hash(dentry, qname) != 0) - goto end_advance; - - newdent = d_lookup(dentry, qname); - - if (!newdent) { - newdent = d_alloc(dentry, qname); - if (!newdent) - goto end_advance; - } else { - hashed = 1; - memcpy((char *) newdent->d_name.name, qname->name, - newdent->d_name.len); - } - - if (!newdent->d_inode) { - smb_renew_times(newdent); - entry->f_ino = iunique(inode->i_sb, 2); - newino = smb_iget(inode->i_sb, entry); - if (newino) { - smb_new_dentry(newdent); - d_instantiate(newdent, newino); - if (!hashed) - d_rehash(newdent); - } - } else - smb_set_inode_attr(newdent->d_inode, entry); - - if (newdent->d_inode) { - ino = newdent->d_inode->i_ino; - newdent->d_fsdata = (void *) ctl.fpos; - smb_new_dentry(newdent); - } - - if (ctl.idx >= SMB_DIRCACHE_SIZE) { - if (ctl.page) { - kunmap(ctl.page); - SetPageUptodate(ctl.page); - unlock_page(ctl.page); - page_cache_release(ctl.page); - } - ctl.cache = NULL; - ctl.idx -= SMB_DIRCACHE_SIZE; - ctl.ofs += 1; - ctl.page = grab_cache_page(&inode->i_data, ctl.ofs); - if (ctl.page) - ctl.cache = kmap(ctl.page); - } - if (ctl.cache) { - ctl.cache->dentry[ctl.idx] = newdent; - valid = 1; - } - dput(newdent); - -end_advance: - if (!valid) - ctl.valid = 0; - if (!ctl.filled && (ctl.fpos == filp->f_pos)) { - if (!ino) - ino = find_inode_number(dentry, qname); - if (!ino) - ino = iunique(inode->i_sb, 2); - ctl.filled = filldir(dirent, qname->name, qname->len, - filp->f_pos, ino, DT_UNKNOWN); - if (!ctl.filled) - filp->f_pos += 1; - } - ctl.fpos += 1; - ctl.idx += 1; - *ctrl = ctl; - return (ctl.valid || !ctl.filled); -} diff --git a/fs/smbfs/dir.c b/fs/smbfs/dir.c deleted file mode 100644 index f678d42..0000000 --- a/fs/smbfs/dir.c +++ /dev/null @@ -1,696 +0,0 @@ -/* - * dir.c - * - * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke - * Copyright (C) 1997 by Volker Lendecke - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/time.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/smp_lock.h> -#include <linux/ctype.h> -#include <linux/net.h> -#include <linux/sched.h> - -#include <linux/smb_fs.h> -#include <linux/smb_mount.h> -#include <linux/smbno.h> - -#include "smb_debug.h" -#include "proto.h" - -static int smb_readdir(struct file *, void *, filldir_t); -static int smb_dir_open(struct inode *, struct file *); - -static struct dentry *smb_lookup(struct inode *, struct dentry *, struct nameidata *); -static int smb_create(struct inode *, struct dentry *, int, struct nameidata *); -static int smb_mkdir(struct inode *, struct dentry *, int); -static int smb_rmdir(struct inode *, struct dentry *); -static int smb_unlink(struct inode *, struct dentry *); -static int smb_rename(struct inode *, struct dentry *, - struct inode *, struct dentry *); -static int smb_make_node(struct inode *,struct dentry *,int,dev_t); -static int smb_link(struct dentry *, struct inode *, struct dentry *); - -const struct file_operations smb_dir_operations = -{ - .llseek = generic_file_llseek, - .read = generic_read_dir, - .readdir = smb_readdir, - .unlocked_ioctl = smb_ioctl, - .open = smb_dir_open, -}; - -const struct inode_operations smb_dir_inode_operations = -{ - .create = smb_create, - .lookup = smb_lookup, - .unlink = smb_unlink, - .mkdir = smb_mkdir, - .rmdir = smb_rmdir, - .rename = smb_rename, - .getattr = smb_getattr, - .setattr = smb_notify_change, -}; - -const struct inode_operations smb_dir_inode_operations_unix = -{ - .create = smb_create, - .lookup = smb_lookup, - .unlink = smb_unlink, - .mkdir = smb_mkdir, - .rmdir = smb_rmdir, - .rename = smb_rename, - .getattr = smb_getattr, - .setattr = smb_notify_change, - .symlink = smb_symlink, - .mknod = smb_make_node, - .link = smb_link, -}; - -/* - * Read a directory, using filldir to fill the dirent memory. - * smb_proc_readdir does the actual reading from the smb server. - * - * The cache code is almost directly taken from ncpfs - */ -static int -smb_readdir(struct file *filp, void *dirent, filldir_t filldir) -{ - struct dentry *dentry = filp->f_path.dentry; - struct inode *dir = dentry->d_inode; - struct smb_sb_info *server = server_from_dentry(dentry); - union smb_dir_cache *cache = NULL; - struct smb_cache_control ctl; - struct page *page = NULL; - int result; - - ctl.page = NULL; - ctl.cache = NULL; - - VERBOSE("reading %s/%s, f_pos=%d\n", - DENTRY_PATH(dentry), (int) filp->f_pos); - - result = 0; - - lock_kernel(); - - switch ((unsigned int) filp->f_pos) { - case 0: - if (filldir(dirent, ".", 1, 0, dir->i_ino, DT_DIR) < 0) - goto out; - filp->f_pos = 1; - /* fallthrough */ - case 1: - if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR) < 0) - goto out; - filp->f_pos = 2; - } - - /* - * Make sure our inode is up-to-date. - */ - result = smb_revalidate_inode(dentry); - if (result) - goto out; - - - page = grab_cache_page(&dir->i_data, 0); - if (!page) - goto read_really; - - ctl.cache = cache = kmap(page); - ctl.head = cache->head; - - if (!PageUptodate(page) || !ctl.head.eof) { - VERBOSE("%s/%s, page uptodate=%d, eof=%d\n", - DENTRY_PATH(dentry), PageUptodate(page),ctl.head.eof); - goto init_cache; - } - - if (filp->f_pos == 2) { - if (jiffies - ctl.head.time >= SMB_MAX_AGE(server)) - goto init_cache; - - /* - * N.B. ncpfs checks mtime of dentry too here, we don't. - * 1. common smb servers do not update mtime on dir changes - * 2. it requires an extra smb request - * (revalidate has the same timeout as ctl.head.time) - * - * Instead smbfs invalidates its own cache on local changes - * and remote changes are not seen until timeout. - */ - } - - if (filp->f_pos > ctl.head.end) - goto finished; - - ctl.fpos = filp->f_pos + (SMB_DIRCACHE_START - 2); - ctl.ofs = ctl.fpos / SMB_DIRCACHE_SIZE; - ctl.idx = ctl.fpos % SMB_DIRCACHE_SIZE; - - for (;;) { - if (ctl.ofs != 0) { - ctl.page = find_lock_page(&dir->i_data, ctl.ofs); - if (!ctl.page) - goto invalid_cache; - ctl.cache = kmap(ctl.page); - if (!PageUptodate(ctl.page)) - goto invalid_cache; - } - while (ctl.idx < SMB_DIRCACHE_SIZE) { - struct dentry *dent; - int res; - - dent = smb_dget_fpos(ctl.cache->dentry[ctl.idx], - dentry, filp->f_pos); - if (!dent) - goto invalid_cache; - - res = filldir(dirent, dent->d_name.name, - dent->d_name.len, filp->f_pos, - dent->d_inode->i_ino, DT_UNKNOWN); - dput(dent); - if (res) - goto finished; - filp->f_pos += 1; - ctl.idx += 1; - if (filp->f_pos > ctl.head.end) - goto finished; - } - if (ctl.page) { - kunmap(ctl.page); - SetPageUptodate(ctl.page); - unlock_page(ctl.page); - page_cache_release(ctl.page); - ctl.page = NULL; - } - ctl.idx = 0; - ctl.ofs += 1; - } -invalid_cache: - if (ctl.page) { - kunmap(ctl.page); - unlock_page(ctl.page); - page_cache_release(ctl.page); - ctl.page = NULL; - } - ctl.cache = cache; -init_cache: - smb_invalidate_dircache_entries(dentry); - ctl.head.time = jiffies; - ctl.head.eof = 0; - ctl.fpos = 2; - ctl.ofs = 0; - ctl.idx = SMB_DIRCACHE_START; - ctl.filled = 0; - ctl.valid = 1; -read_really: - result = server->ops->readdir(filp, dirent, filldir, &ctl); - if (result == -ERESTARTSYS && page) - ClearPageUptodate(page); - if (ctl.idx == -1) - goto invalid_cache; /* retry */ - ctl.head.end = ctl.fpos - 1; - ctl.head.eof = ctl.valid; -finished: - if (page) { - cache->head = ctl.head; - kunmap(page); - if (result != -ERESTARTSYS) - SetPageUptodate(page); - unlock_page(page); - page_cache_release(page); - } - if (ctl.page) { - kunmap(ctl.page); - SetPageUptodate(ctl.page); - unlock_page(ctl.page); - page_cache_release(ctl.page); - } -out: - unlock_kernel(); - return result; -} - -static int -smb_dir_open(struct inode *dir, struct file *file) -{ - struct dentry *dentry = file->f_path.dentry; - struct smb_sb_info *server; - int error = 0; - - VERBOSE("(%s/%s)\n", dentry->d_parent->d_name.name, - file->f_path.dentry->d_name.name); - - /* - * Directory timestamps in the core protocol aren't updated - * when a file is added, so we give them a very short TTL. - */ - lock_kernel(); - server = server_from_dentry(dentry); - if (server->opt.protocol < SMB_PROTOCOL_LANMAN2) { - unsigned long age = jiffies - SMB_I(dir)->oldmtime; - if (age > 2*HZ) - smb_invalid_dir_cache(dir); - } - - /* - * Note: in order to allow the smbmount process to open the - * mount point, we only revalidate if the connection is valid or - * if the process is trying to access something other than the root. - */ - if (server->state == CONN_VALID || !IS_ROOT(dentry)) - error = smb_revalidate_inode(dentry); - unlock_kernel(); - return error; -} - -/* - * Dentry operations routines - */ -static int smb_lookup_validate(struct dentry *, struct nameidata *); -static int smb_hash_dentry(struct dentry *, struct qstr *); -static int smb_compare_dentry(struct dentry *, struct qstr *, struct qstr *); -static int smb_delete_dentry(struct dentry *); - -static const struct dentry_operations smbfs_dentry_operations = -{ - .d_revalidate = smb_lookup_validate, - .d_hash = smb_hash_dentry, - .d_compare = smb_compare_dentry, - .d_delete = smb_delete_dentry, -}; - -static const struct dentry_operations smbfs_dentry_operations_case = -{ - .d_revalidate = smb_lookup_validate, - .d_delete = smb_delete_dentry, -}; - - -/* - * This is the callback when the dcache has a lookup hit. - */ -static int -smb_lookup_validate(struct dentry * dentry, struct nameidata *nd) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - struct inode * inode = dentry->d_inode; - unsigned long age = jiffies - dentry->d_time; - int valid; - - /* - * The default validation is based on dentry age: - * we believe in dentries for a few seconds. (But each - * successful server lookup renews the timestamp.) - */ - valid = (age <= SMB_MAX_AGE(server)); -#ifdef SMBFS_DEBUG_VERBOSE - if (!valid) - VERBOSE("%s/%s not valid, age=%lu\n", - DENTRY_PATH(dentry), age); -#endif - - if (inode) { - lock_kernel(); - if (is_bad_inode(inode)) { - PARANOIA("%s/%s has dud inode\n", DENTRY_PATH(dentry)); - valid = 0; - } else if (!valid) - valid = (smb_revalidate_inode(dentry) == 0); - unlock_kernel(); - } else { - /* - * What should we do for negative dentries? - */ - } - return valid; -} - -static int -smb_hash_dentry(struct dentry *dir, struct qstr *this) -{ - unsigned long hash; - int i; - - hash = init_name_hash(); - for (i=0; i < this->len ; i++) - hash = partial_name_hash(tolower(this->name[i]), hash); - this->hash = end_name_hash(hash); - - return 0; -} - -static int -smb_compare_dentry(struct dentry *dir, struct qstr *a, struct qstr *b) -{ - int i, result = 1; - - if (a->len != b->len) - goto out; - for (i=0; i < a->len; i++) { - if (tolower(a->name[i]) != tolower(b->name[i])) - goto out; - } - result = 0; -out: - return result; -} - -/* - * This is the callback from dput() when d_count is going to 0. - * We use this to unhash dentries with bad inodes. - */ -static int -smb_delete_dentry(struct dentry * dentry) -{ - if (dentry->d_inode) { - if (is_bad_inode(dentry->d_inode)) { - PARANOIA("bad inode, unhashing %s/%s\n", - DENTRY_PATH(dentry)); - return 1; - } - } else { - /* N.B. Unhash negative dentries? */ - } - return 0; -} - -/* - * Initialize a new dentry - */ -void -smb_new_dentry(struct dentry *dentry) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - - if (server->mnt->flags & SMB_MOUNT_CASE) - dentry->d_op = &smbfs_dentry_operations_case; - else - dentry->d_op = &smbfs_dentry_operations; - dentry->d_time = jiffies; -} - - -/* - * Whenever a lookup succeeds, we know the parent directories - * are all valid, so we want to update the dentry timestamps. - * N.B. Move this to dcache? - */ -void -smb_renew_times(struct dentry * dentry) -{ - dget(dentry); - dentry->d_time = jiffies; - - while (!IS_ROOT(dentry)) { - struct dentry *parent = dget_parent(dentry); - dput(dentry); - dentry = parent; - - dentry->d_time = jiffies; - } - dput(dentry); -} - -static struct dentry * -smb_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) -{ - struct smb_fattr finfo; - struct inode *inode; - int error; - struct smb_sb_info *server; - - error = -ENAMETOOLONG; - if (dentry->d_name.len > SMB_MAXNAMELEN) - goto out; - - /* Do not allow lookup of names with backslashes in */ - error = -EINVAL; - if (memchr(dentry->d_name.name, '\\', dentry->d_name.len)) - goto out; - - lock_kernel(); - error = smb_proc_getattr(dentry, &finfo); -#ifdef SMBFS_PARANOIA - if (error && error != -ENOENT) - PARANOIA("find %s/%s failed, error=%d\n", - DENTRY_PATH(dentry), error); -#endif - - inode = NULL; - if (error == -ENOENT) - goto add_entry; - if (!error) { - error = -EACCES; - finfo.f_ino = iunique(dentry->d_sb, 2); - inode = smb_iget(dir->i_sb, &finfo); - if (inode) { - add_entry: - server = server_from_dentry(dentry); - if (server->mnt->flags & SMB_MOUNT_CASE) - dentry->d_op = &smbfs_dentry_operations_case; - else - dentry->d_op = &smbfs_dentry_operations; - - d_add(dentry, inode); - smb_renew_times(dentry); - error = 0; - } - } - unlock_kernel(); -out: - return ERR_PTR(error); -} - -/* - * This code is common to all routines creating a new inode. - */ -static int -smb_instantiate(struct dentry *dentry, __u16 fileid, int have_id) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - struct inode *inode; - int error; - struct smb_fattr fattr; - - VERBOSE("file %s/%s, fileid=%u\n", DENTRY_PATH(dentry), fileid); - - error = smb_proc_getattr(dentry, &fattr); - if (error) - goto out_close; - - smb_renew_times(dentry); - fattr.f_ino = iunique(dentry->d_sb, 2); - inode = smb_iget(dentry->d_sb, &fattr); - if (!inode) - goto out_no_inode; - - if (have_id) { - struct smb_inode_info *ei = SMB_I(inode); - ei->fileid = fileid; - ei->access = SMB_O_RDWR; - ei->open = server->generation; - } - d_instantiate(dentry, inode); -out: - return error; - -out_no_inode: - error = -EACCES; -out_close: - if (have_id) { - PARANOIA("%s/%s failed, error=%d, closing %u\n", - DENTRY_PATH(dentry), error, fileid); - smb_close_fileid(dentry, fileid); - } - goto out; -} - -/* N.B. How should the mode argument be used? */ -static int -smb_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *nd) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - __u16 fileid; - int error; - struct iattr attr; - - VERBOSE("creating %s/%s, mode=%d\n", DENTRY_PATH(dentry), mode); - - lock_kernel(); - smb_invalid_dir_cache(dir); - error = smb_proc_create(dentry, 0, get_seconds(), &fileid); - if (!error) { - if (server->opt.capabilities & SMB_CAP_UNIX) { - /* Set attributes for new file */ - attr.ia_valid = ATTR_MODE; - attr.ia_mode = mode; - error = smb_proc_setattr_unix(dentry, &attr, 0, 0); - } - error = smb_instantiate(dentry, fileid, 1); - } else { - PARANOIA("%s/%s failed, error=%d\n", - DENTRY_PATH(dentry), error); - } - unlock_kernel(); - return error; -} - -/* N.B. How should the mode argument be used? */ -static int -smb_mkdir(struct inode *dir, struct dentry *dentry, int mode) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - int error; - struct iattr attr; - - lock_kernel(); - smb_invalid_dir_cache(dir); - error = smb_proc_mkdir(dentry); - if (!error) { - if (server->opt.capabilities & SMB_CAP_UNIX) { - /* Set attributes for new directory */ - attr.ia_valid = ATTR_MODE; - attr.ia_mode = mode; - error = smb_proc_setattr_unix(dentry, &attr, 0, 0); - } - error = smb_instantiate(dentry, 0, 0); - } - unlock_kernel(); - return error; -} - -static int -smb_rmdir(struct inode *dir, struct dentry *dentry) -{ - struct inode *inode = dentry->d_inode; - int error; - - /* - * Close the directory if it's open. - */ - lock_kernel(); - smb_close(inode); - - /* - * Check that nobody else is using the directory.. - */ - error = -EBUSY; - if (!d_unhashed(dentry)) - goto out; - - smb_invalid_dir_cache(dir); - error = smb_proc_rmdir(dentry); - -out: - unlock_kernel(); - return error; -} - -static int -smb_unlink(struct inode *dir, struct dentry *dentry) -{ - int error; - - /* - * Close the file if it's open. - */ - lock_kernel(); - smb_close(dentry->d_inode); - - smb_invalid_dir_cache(dir); - error = smb_proc_unlink(dentry); - if (!error) - smb_renew_times(dentry); - unlock_kernel(); - return error; -} - -static int -smb_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) -{ - int error; - - /* - * Close any open files, and check whether to delete the - * target before attempting the rename. - */ - lock_kernel(); - if (old_dentry->d_inode) - smb_close(old_dentry->d_inode); - if (new_dentry->d_inode) { - smb_close(new_dentry->d_inode); - error = smb_proc_unlink(new_dentry); - if (error) { - VERBOSE("unlink %s/%s, error=%d\n", - DENTRY_PATH(new_dentry), error); - goto out; - } - /* FIXME */ - d_delete(new_dentry); - } - - smb_invalid_dir_cache(old_dir); - smb_invalid_dir_cache(new_dir); - error = smb_proc_mv(old_dentry, new_dentry); - if (!error) { - smb_renew_times(old_dentry); - smb_renew_times(new_dentry); - } -out: - unlock_kernel(); - return error; -} - -/* - * FIXME: samba servers won't let you create device nodes unless uid/gid - * matches the connection credentials (and we don't know which those are ...) - */ -static int -smb_make_node(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) -{ - int error; - struct iattr attr; - - attr.ia_valid = ATTR_MODE | ATTR_UID | ATTR_GID; - attr.ia_mode = mode; - current_euid_egid(&attr.ia_uid, &attr.ia_gid); - - if (!new_valid_dev(dev)) - return -EINVAL; - - smb_invalid_dir_cache(dir); - error = smb_proc_setattr_unix(dentry, &attr, MAJOR(dev), MINOR(dev)); - if (!error) { - error = smb_instantiate(dentry, 0, 0); - } - return error; -} - -/* - * dentry = existing file - * new_dentry = new file - */ -static int -smb_link(struct dentry *dentry, struct inode *dir, struct dentry *new_dentry) -{ - int error; - - DEBUG1("smb_link old=%s/%s new=%s/%s\n", - DENTRY_PATH(dentry), DENTRY_PATH(new_dentry)); - smb_invalid_dir_cache(dir); - error = smb_proc_link(server_from_dentry(dentry), dentry, new_dentry); - if (!error) { - smb_renew_times(dentry); - error = smb_instantiate(new_dentry, 0, 0); - } - return error; -} diff --git a/fs/smbfs/file.c b/fs/smbfs/file.c deleted file mode 100644 index 8e187a0..0000000 --- a/fs/smbfs/file.c +++ /dev/null @@ -1,454 +0,0 @@ -/* - * file.c - * - * Copyright (C) 1995, 1996, 1997 by Paal-Kr. Engstad and Volker Lendecke - * Copyright (C) 1997 by Volker Lendecke - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/time.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/fcntl.h> -#include <linux/stat.h> -#include <linux/mm.h> -#include <linux/pagemap.h> -#include <linux/smp_lock.h> -#include <linux/net.h> -#include <linux/aio.h> - -#include <asm/uaccess.h> -#include <asm/system.h> - -#include <linux/smbno.h> -#include <linux/smb_fs.h> - -#include "smb_debug.h" -#include "proto.h" - -static int -smb_fsync(struct file *file, int datasync) -{ - struct dentry *dentry = file->f_path.dentry; - struct smb_sb_info *server = server_from_dentry(dentry); - int result; - - VERBOSE("sync file %s/%s\n", DENTRY_PATH(dentry)); - - /* - * The VFS will writepage() all dirty pages for us, but we - * should send a SMBflush to the server, letting it know that - * we want things synchronized with actual storage. - * - * Note: this function requires all pages to have been written already - * (should be ok with writepage_sync) - */ - result = smb_proc_flush(server, SMB_I(dentry->d_inode)->fileid); - return result; -} - -/* - * Read a page synchronously. - */ -static int -smb_readpage_sync(struct dentry *dentry, struct page *page) -{ - char *buffer = kmap(page); - loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT; - struct smb_sb_info *server = server_from_dentry(dentry); - unsigned int rsize = smb_get_rsize(server); - int count = PAGE_SIZE; - int result; - - VERBOSE("file %s/%s, count=%d@%Ld, rsize=%d\n", - DENTRY_PATH(dentry), count, offset, rsize); - - result = smb_open(dentry, SMB_O_RDONLY); - if (result < 0) - goto io_error; - - do { - if (count < rsize) - rsize = count; - - result = server->ops->read(dentry->d_inode,offset,rsize,buffer); - if (result < 0) - goto io_error; - - count -= result; - offset += result; - buffer += result; - dentry->d_inode->i_atime = - current_fs_time(dentry->d_inode->i_sb); - if (result < rsize) - break; - } while (count); - - memset(buffer, 0, count); - flush_dcache_page(page); - SetPageUptodate(page); - result = 0; - -io_error: - kunmap(page); - unlock_page(page); - return result; -} - -/* - * We are called with the page locked and we unlock it when done. - */ -static int -smb_readpage(struct file *file, struct page *page) -{ - int error; - struct dentry *dentry = file->f_path.dentry; - - page_cache_get(page); - error = smb_readpage_sync(dentry, page); - page_cache_release(page); - return error; -} - -/* - * Write a page synchronously. - * Offset is the data offset within the page. - */ -static int -smb_writepage_sync(struct inode *inode, struct page *page, - unsigned long pageoffset, unsigned int count) -{ - loff_t offset; - char *buffer = kmap(page) + pageoffset; - struct smb_sb_info *server = server_from_inode(inode); - unsigned int wsize = smb_get_wsize(server); - int ret = 0; - - offset = ((loff_t)page->index << PAGE_CACHE_SHIFT) + pageoffset; - VERBOSE("file ino=%ld, fileid=%d, count=%d@%Ld, wsize=%d\n", - inode->i_ino, SMB_I(inode)->fileid, count, offset, wsize); - - do { - int write_ret; - - if (count < wsize) - wsize = count; - - write_ret = server->ops->write(inode, offset, wsize, buffer); - if (write_ret < 0) { - PARANOIA("failed write, wsize=%d, write_ret=%d\n", - wsize, write_ret); - ret = write_ret; - break; - } - /* N.B. what if result < wsize?? */ -#ifdef SMBFS_PARANOIA - if (write_ret < wsize) - PARANOIA("short write, wsize=%d, write_ret=%d\n", - wsize, write_ret); -#endif - buffer += wsize; - offset += wsize; - count -= wsize; - /* - * Update the inode now rather than waiting for a refresh. - */ - inode->i_mtime = inode->i_atime = current_fs_time(inode->i_sb); - SMB_I(inode)->flags |= SMB_F_LOCALWRITE; - if (offset > inode->i_size) - inode->i_size = offset; - } while (count); - - kunmap(page); - return ret; -} - -/* - * Write a page to the server. This will be used for NFS swapping only - * (for now), and we currently do this synchronously only. - * - * We are called with the page locked and we unlock it when done. - */ -static int -smb_writepage(struct page *page, struct writeback_control *wbc) -{ - struct address_space *mapping = page->mapping; - struct inode *inode; - unsigned long end_index; - unsigned offset = PAGE_CACHE_SIZE; - int err; - - BUG_ON(!mapping); - inode = mapping->host; - BUG_ON(!inode); - - end_index = inode->i_size >> PAGE_CACHE_SHIFT; - - /* easy case */ - if (page->index < end_index) - goto do_it; - /* things got complicated... */ - offset = inode->i_size & (PAGE_CACHE_SIZE-1); - /* OK, are we completely out? */ - if (page->index >= end_index+1 || !offset) - return 0; /* truncated - don't care */ -do_it: - page_cache_get(page); - err = smb_writepage_sync(inode, page, 0, offset); - SetPageUptodate(page); - unlock_page(page); - page_cache_release(page); - return err; -} - -static int -smb_updatepage(struct file *file, struct page *page, unsigned long offset, - unsigned int count) -{ - struct dentry *dentry = file->f_path.dentry; - - DEBUG1("(%s/%s %d@%lld)\n", DENTRY_PATH(dentry), count, - ((unsigned long long)page->index << PAGE_CACHE_SHIFT) + offset); - - return smb_writepage_sync(dentry->d_inode, page, offset, count); -} - -static ssize_t -smb_file_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - struct file * file = iocb->ki_filp; - struct dentry * dentry = file->f_path.dentry; - ssize_t status; - - VERBOSE("file %s/%s, count=%lu@%lu\n", DENTRY_PATH(dentry), - (unsigned long) iocb->ki_left, (unsigned long) pos); - - status = smb_revalidate_inode(dentry); - if (status) { - PARANOIA("%s/%s validation failed, error=%Zd\n", - DENTRY_PATH(dentry), status); - goto out; - } - - VERBOSE("before read, size=%ld, flags=%x, atime=%ld\n", - (long)dentry->d_inode->i_size, - dentry->d_inode->i_flags, dentry->d_inode->i_atime.tv_sec); - - status = generic_file_aio_read(iocb, iov, nr_segs, pos); -out: - return status; -} - -static int -smb_file_mmap(struct file * file, struct vm_area_struct * vma) -{ - struct dentry * dentry = file->f_path.dentry; - int status; - - VERBOSE("file %s/%s, address %lu - %lu\n", - DENTRY_PATH(dentry), vma->vm_start, vma->vm_end); - - status = smb_revalidate_inode(dentry); - if (status) { - PARANOIA("%s/%s validation failed, error=%d\n", - DENTRY_PATH(dentry), status); - goto out; - } - status = generic_file_mmap(file, vma); -out: - return status; -} - -static ssize_t -smb_file_splice_read(struct file *file, loff_t *ppos, - struct pipe_inode_info *pipe, size_t count, - unsigned int flags) -{ - struct dentry *dentry = file->f_path.dentry; - ssize_t status; - - VERBOSE("file %s/%s, pos=%Ld, count=%lu\n", - DENTRY_PATH(dentry), *ppos, count); - - status = smb_revalidate_inode(dentry); - if (status) { - PARANOIA("%s/%s validation failed, error=%Zd\n", - DENTRY_PATH(dentry), status); - goto out; - } - status = generic_file_splice_read(file, ppos, pipe, count, flags); -out: - return status; -} - -/* - * This does the "real" work of the write. The generic routine has - * allocated the page, locked it, done all the page alignment stuff - * calculations etc. Now we should just copy the data from user - * space and write it back to the real medium.. - * - * If the writer ends up delaying the write, the writer needs to - * increment the page use counts until he is done with the page. - */ -static int smb_write_begin(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - pgoff_t index = pos >> PAGE_CACHE_SHIFT; - *pagep = grab_cache_page_write_begin(mapping, index, flags); - if (!*pagep) - return -ENOMEM; - return 0; -} - -static int smb_write_end(struct file *file, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *page, void *fsdata) -{ - int status; - unsigned offset = pos & (PAGE_CACHE_SIZE - 1); - - lock_kernel(); - status = smb_updatepage(file, page, offset, copied); - unlock_kernel(); - - if (!status) { - if (!PageUptodate(page) && copied == PAGE_CACHE_SIZE) - SetPageUptodate(page); - status = copied; - } - - unlock_page(page); - page_cache_release(page); - - return status; -} - -const struct address_space_operations smb_file_aops = { - .readpage = smb_readpage, - .writepage = smb_writepage, - .write_begin = smb_write_begin, - .write_end = smb_write_end, -}; - -/* - * Write to a file (through the page cache). - */ -static ssize_t -smb_file_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - struct file * file = iocb->ki_filp; - struct dentry * dentry = file->f_path.dentry; - ssize_t result; - - VERBOSE("file %s/%s, count=%lu@%lu\n", - DENTRY_PATH(dentry), - (unsigned long) iocb->ki_left, (unsigned long) pos); - - result = smb_revalidate_inode(dentry); - if (result) { - PARANOIA("%s/%s validation failed, error=%Zd\n", - DENTRY_PATH(dentry), result); - goto out; - } - - result = smb_open(dentry, SMB_O_WRONLY); - if (result) - goto out; - - if (iocb->ki_left > 0) { - result = generic_file_aio_write(iocb, iov, nr_segs, pos); - VERBOSE("pos=%ld, size=%ld, mtime=%ld, atime=%ld\n", - (long) file->f_pos, (long) dentry->d_inode->i_size, - dentry->d_inode->i_mtime.tv_sec, - dentry->d_inode->i_atime.tv_sec); - } -out: - return result; -} - -static int -smb_file_open(struct inode *inode, struct file * file) -{ - int result; - struct dentry *dentry = file->f_path.dentry; - int smb_mode = (file->f_mode & O_ACCMODE) - 1; - - lock_kernel(); - result = smb_open(dentry, smb_mode); - if (result) - goto out; - SMB_I(inode)->openers++; -out: - unlock_kernel(); - return result; -} - -static int -smb_file_release(struct inode *inode, struct file * file) -{ - lock_kernel(); - if (!--SMB_I(inode)->openers) { - /* We must flush any dirty pages now as we won't be able to - write anything after close. mmap can trigger this. - "openers" should perhaps include mmap'ers ... */ - filemap_write_and_wait(inode->i_mapping); - smb_close(inode); - } - unlock_kernel(); - return 0; -} - -/* - * Check whether the required access is compatible with - * an inode's permission. SMB doesn't recognize superuser - * privileges, so we need our own check for this. - */ -static int -smb_file_permission(struct inode *inode, int mask) -{ - int mode = inode->i_mode; - int error = 0; - - VERBOSE("mode=%x, mask=%x\n", mode, mask); - - /* Look at user permissions */ - mode >>= 6; - if (mask & ~mode & (MAY_READ | MAY_WRITE | MAY_EXEC)) - error = -EACCES; - return error; -} - -static loff_t smb_remote_llseek(struct file *file, loff_t offset, int origin) -{ - loff_t ret; - lock_kernel(); - ret = generic_file_llseek_unlocked(file, offset, origin); - unlock_kernel(); - return ret; -} - -const struct file_operations smb_file_operations = -{ - .llseek = smb_remote_llseek, - .read = do_sync_read, - .aio_read = smb_file_aio_read, - .write = do_sync_write, - .aio_write = smb_file_aio_write, - .unlocked_ioctl = smb_ioctl, - .mmap = smb_file_mmap, - .open = smb_file_open, - .release = smb_file_release, - .fsync = smb_fsync, - .splice_read = smb_file_splice_read, -}; - -const struct inode_operations smb_file_inode_operations = -{ - .permission = smb_file_permission, - .getattr = smb_getattr, - .setattr = smb_notify_change, -}; diff --git a/fs/smbfs/getopt.c b/fs/smbfs/getopt.c deleted file mode 100644 index 7ae0f52..0000000 --- a/fs/smbfs/getopt.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * getopt.c - */ - -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/net.h> - -#include "getopt.h" - -/** - * smb_getopt - option parser - * @caller: name of the caller, for error messages - * @options: the options string - * @opts: an array of &struct option entries controlling parser operations - * @optopt: output; will contain the current option - * @optarg: output; will contain the value (if one exists) - * @flag: output; may be NULL; should point to a long for or'ing flags - * @value: output; may be NULL; will be overwritten with the integer value - * of the current argument. - * - * Helper to parse options on the format used by mount ("a=b,c=d,e,f"). - * Returns opts->val if a matching entry in the 'opts' array is found, - * 0 when no more tokens are found, -1 if an error is encountered. - */ -int smb_getopt(char *caller, char **options, struct option *opts, - char **optopt, char **optarg, unsigned long *flag, - unsigned long *value) -{ - char *token; - char *val; - int i; - - do { - if ((token = strsep(options, ",")) == NULL) - return 0; - } while (*token == '\0'); - *optopt = token; - - *optarg = NULL; - if ((val = strchr (token, '=')) != NULL) { - *val++ = 0; - if (value) - *value = simple_strtoul(val, NULL, 0); - *optarg = val; - } - - for (i = 0; opts[i].name != NULL; i++) { - if (!strcmp(opts[i].name, token)) { - if (!opts[i].flag && (!val || !*val)) { - printk("%s: the %s option requires an argument\n", - caller, token); - return -1; - } - - if (flag && opts[i].flag) - *flag |= opts[i].flag; - - return opts[i].val; - } - } - printk("%s: Unrecognized mount option %s\n", caller, token); - return -1; -} diff --git a/fs/smbfs/getopt.h b/fs/smbfs/getopt.h deleted file mode 100644 index 146219a..0000000 --- a/fs/smbfs/getopt.h +++ /dev/null @@ -1,14 +0,0 @@ -#ifndef _LINUX_GETOPT_H -#define _LINUX_GETOPT_H - -struct option { - const char *name; - unsigned long flag; - int val; -}; - -extern int smb_getopt(char *caller, char **options, struct option *opts, - char **optopt, char **optarg, unsigned long *flag, - unsigned long *value); - -#endif /* _LINUX_GETOPT_H */ diff --git a/fs/smbfs/inode.c b/fs/smbfs/inode.c deleted file mode 100644 index f6e9ee5..0000000 --- a/fs/smbfs/inode.c +++ /dev/null @@ -1,843 +0,0 @@ -/* - * inode.c - * - * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke - * Copyright (C) 1997 by Volker Lendecke - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/module.h> -#include <linux/time.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/string.h> -#include <linux/stat.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/file.h> -#include <linux/dcache.h> -#include <linux/smp_lock.h> -#include <linux/nls.h> -#include <linux/seq_file.h> -#include <linux/mount.h> -#include <linux/net.h> -#include <linux/vfs.h> -#include <linux/highuid.h> -#include <linux/sched.h> -#include <linux/smb_fs.h> -#include <linux/smbno.h> -#include <linux/smb_mount.h> - -#include <asm/system.h> -#include <asm/uaccess.h> - -#include "smb_debug.h" -#include "getopt.h" -#include "proto.h" - -/* Always pick a default string */ -#ifdef CONFIG_SMB_NLS_REMOTE -#define SMB_NLS_REMOTE CONFIG_SMB_NLS_REMOTE -#else -#define SMB_NLS_REMOTE "" -#endif - -#define SMB_TTL_DEFAULT 1000 - -static void smb_evict_inode(struct inode *); -static void smb_put_super(struct super_block *); -static int smb_statfs(struct dentry *, struct kstatfs *); -static int smb_show_options(struct seq_file *, struct vfsmount *); - -static struct kmem_cache *smb_inode_cachep; - -static struct inode *smb_alloc_inode(struct super_block *sb) -{ - struct smb_inode_info *ei; - ei = (struct smb_inode_info *)kmem_cache_alloc(smb_inode_cachep, GFP_KERNEL); - if (!ei) - return NULL; - return &ei->vfs_inode; -} - -static void smb_destroy_inode(struct inode *inode) -{ - kmem_cache_free(smb_inode_cachep, SMB_I(inode)); -} - -static void init_once(void *foo) -{ - struct smb_inode_info *ei = (struct smb_inode_info *) foo; - - inode_init_once(&ei->vfs_inode); -} - -static int init_inodecache(void) -{ - smb_inode_cachep = kmem_cache_create("smb_inode_cache", - sizeof(struct smb_inode_info), - 0, (SLAB_RECLAIM_ACCOUNT| - SLAB_MEM_SPREAD), - init_once); - if (smb_inode_cachep == NULL) - return -ENOMEM; - return 0; -} - -static void destroy_inodecache(void) -{ - kmem_cache_destroy(smb_inode_cachep); -} - -static int smb_remount(struct super_block *sb, int *flags, char *data) -{ - *flags |= MS_NODIRATIME; - return 0; -} - -static const struct super_operations smb_sops = -{ - .alloc_inode = smb_alloc_inode, - .destroy_inode = smb_destroy_inode, - .drop_inode = generic_delete_inode, - .evict_inode = smb_evict_inode, - .put_super = smb_put_super, - .statfs = smb_statfs, - .show_options = smb_show_options, - .remount_fs = smb_remount, -}; - - -/* We are always generating a new inode here */ -struct inode * -smb_iget(struct super_block *sb, struct smb_fattr *fattr) -{ - struct smb_sb_info *server = SMB_SB(sb); - struct inode *result; - - DEBUG1("smb_iget: %p\n", fattr); - - result = new_inode(sb); - if (!result) - return result; - result->i_ino = fattr->f_ino; - SMB_I(result)->open = 0; - SMB_I(result)->fileid = 0; - SMB_I(result)->access = 0; - SMB_I(result)->flags = 0; - SMB_I(result)->closed = 0; - SMB_I(result)->openers = 0; - smb_set_inode_attr(result, fattr); - if (S_ISREG(result->i_mode)) { - result->i_op = &smb_file_inode_operations; - result->i_fop = &smb_file_operations; - result->i_data.a_ops = &smb_file_aops; - } else if (S_ISDIR(result->i_mode)) { - if (server->opt.capabilities & SMB_CAP_UNIX) - result->i_op = &smb_dir_inode_operations_unix; - else - result->i_op = &smb_dir_inode_operations; - result->i_fop = &smb_dir_operations; - } else if (S_ISLNK(result->i_mode)) { - result->i_op = &smb_link_inode_operations; - } else { - init_special_inode(result, result->i_mode, fattr->f_rdev); - } - insert_inode_hash(result); - return result; -} - -/* - * Copy the inode data to a smb_fattr structure. - */ -void -smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr) -{ - memset(fattr, 0, sizeof(struct smb_fattr)); - fattr->f_mode = inode->i_mode; - fattr->f_nlink = inode->i_nlink; - fattr->f_ino = inode->i_ino; - fattr->f_uid = inode->i_uid; - fattr->f_gid = inode->i_gid; - fattr->f_size = inode->i_size; - fattr->f_mtime = inode->i_mtime; - fattr->f_ctime = inode->i_ctime; - fattr->f_atime = inode->i_atime; - fattr->f_blocks = inode->i_blocks; - - fattr->attr = SMB_I(inode)->attr; - /* - * Keep the attributes in sync with the inode permissions. - */ - if (fattr->f_mode & S_IWUSR) - fattr->attr &= ~aRONLY; - else - fattr->attr |= aRONLY; -} - -/* - * Update the inode, possibly causing it to invalidate its pages if mtime/size - * is different from last time. - */ -void -smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr) -{ - struct smb_inode_info *ei = SMB_I(inode); - - /* - * A size change should have a different mtime, or same mtime - * but different size. - */ - time_t last_time = inode->i_mtime.tv_sec; - loff_t last_sz = inode->i_size; - - inode->i_mode = fattr->f_mode; - inode->i_nlink = fattr->f_nlink; - inode->i_uid = fattr->f_uid; - inode->i_gid = fattr->f_gid; - inode->i_ctime = fattr->f_ctime; - inode->i_blocks = fattr->f_blocks; - inode->i_size = fattr->f_size; - inode->i_mtime = fattr->f_mtime; - inode->i_atime = fattr->f_atime; - ei->attr = fattr->attr; - - /* - * Update the "last time refreshed" field for revalidation. - */ - ei->oldmtime = jiffies; - - if (inode->i_mtime.tv_sec != last_time || inode->i_size != last_sz) { - VERBOSE("%ld changed, old=%ld, new=%ld, oz=%ld, nz=%ld\n", - inode->i_ino, - (long) last_time, (long) inode->i_mtime.tv_sec, - (long) last_sz, (long) inode->i_size); - - if (!S_ISDIR(inode->i_mode)) - invalidate_remote_inode(inode); - } -} - -/* - * This is called if the connection has gone bad ... - * try to kill off all the current inodes. - */ -void -smb_invalidate_inodes(struct smb_sb_info *server) -{ - VERBOSE("\n"); - shrink_dcache_sb(SB_of(server)); -} - -/* - * This is called to update the inode attributes after - * we've made changes to a file or directory. - */ -static int -smb_refresh_inode(struct dentry *dentry) -{ - struct inode *inode = dentry->d_inode; - int error; - struct smb_fattr fattr; - - error = smb_proc_getattr(dentry, &fattr); - if (!error) { - smb_renew_times(dentry); - /* - * Check whether the type part of the mode changed, - * and don't update the attributes if it did. - * - * And don't dick with the root inode - */ - if (inode->i_ino == 2) - return error; - if (S_ISLNK(inode->i_mode)) - return error; /* VFS will deal with it */ - - if ((inode->i_mode & S_IFMT) == (fattr.f_mode & S_IFMT)) { - smb_set_inode_attr(inode, &fattr); - } else { - /* - * Big trouble! The inode has become a new object, - * so any operations attempted on it are invalid. - * - * To limit damage, mark the inode as bad so that - * subsequent lookup validations will fail. - */ - PARANOIA("%s/%s changed mode, %07o to %07o\n", - DENTRY_PATH(dentry), - inode->i_mode, fattr.f_mode); - - fattr.f_mode = inode->i_mode; /* save mode */ - make_bad_inode(inode); - inode->i_mode = fattr.f_mode; /* restore mode */ - /* - * No need to worry about unhashing the dentry: the - * lookup validation will see that the inode is bad. - * But we do want to invalidate the caches ... - */ - if (!S_ISDIR(inode->i_mode)) - invalidate_remote_inode(inode); - else - smb_invalid_dir_cache(inode); - error = -EIO; - } - } - return error; -} - -/* - * This is called when we want to check whether the inode - * has changed on the server. If it has changed, we must - * invalidate our local caches. - */ -int -smb_revalidate_inode(struct dentry *dentry) -{ - struct smb_sb_info *s = server_from_dentry(dentry); - struct inode *inode = dentry->d_inode; - int error = 0; - - DEBUG1("smb_revalidate_inode\n"); - lock_kernel(); - - /* - * Check whether we've recently refreshed the inode. - */ - if (time_before(jiffies, SMB_I(inode)->oldmtime + SMB_MAX_AGE(s))) { - VERBOSE("up-to-date, ino=%ld, jiffies=%lu, oldtime=%lu\n", - inode->i_ino, jiffies, SMB_I(inode)->oldmtime); - goto out; - } - - error = smb_refresh_inode(dentry); -out: - unlock_kernel(); - return error; -} - -/* - * This routine is called when i_nlink == 0 and i_count goes to 0. - * All blocking cleanup operations need to go here to avoid races. - */ -static void -smb_evict_inode(struct inode *ino) -{ - DEBUG1("ino=%ld\n", ino->i_ino); - truncate_inode_pages(&ino->i_data, 0); - end_writeback(ino); - lock_kernel(); - if (smb_close(ino)) - PARANOIA("could not close inode %ld\n", ino->i_ino); - unlock_kernel(); -} - -static struct option opts[] = { - { "version", 0, 'v' }, - { "win95", SMB_MOUNT_WIN95, 1 }, - { "oldattr", SMB_MOUNT_OLDATTR, 1 }, - { "dirattr", SMB_MOUNT_DIRATTR, 1 }, - { "case", SMB_MOUNT_CASE, 1 }, - { "uid", 0, 'u' }, - { "gid", 0, 'g' }, - { "file_mode", 0, 'f' }, - { "dir_mode", 0, 'd' }, - { "iocharset", 0, 'i' }, - { "codepage", 0, 'c' }, - { "ttl", 0, 't' }, - { NULL, 0, 0} -}; - -static int -parse_options(struct smb_mount_data_kernel *mnt, char *options) -{ - int c; - unsigned long flags; - unsigned long value; - char *optarg; - char *optopt; - - flags = 0; - while ( (c = smb_getopt("smbfs", &options, opts, - &optopt, &optarg, &flags, &value)) > 0) { - - VERBOSE("'%s' -> '%s'\n", optopt, optarg ? optarg : "<none>"); - switch (c) { - case 1: - /* got a "flag" option */ - break; - case 'v': - if (value != SMB_MOUNT_VERSION) { - printk ("smbfs: Bad mount version %ld, expected %d\n", - value, SMB_MOUNT_VERSION); - return 0; - } - mnt->version = value; - break; - case 'u': - mnt->uid = value; - flags |= SMB_MOUNT_UID; - break; - case 'g': - mnt->gid = value; - flags |= SMB_MOUNT_GID; - break; - case 'f': - mnt->file_mode = (value & S_IRWXUGO) | S_IFREG; - flags |= SMB_MOUNT_FMODE; - break; - case 'd': - mnt->dir_mode = (value & S_IRWXUGO) | S_IFDIR; - flags |= SMB_MOUNT_DMODE; - break; - case 'i': - strlcpy(mnt->codepage.local_name, optarg, - SMB_NLS_MAXNAMELEN); - break; - case 'c': - strlcpy(mnt->codepage.remote_name, optarg, - SMB_NLS_MAXNAMELEN); - break; - case 't': - mnt->ttl = value; - break; - default: - printk ("smbfs: Unrecognized mount option %s\n", - optopt); - return -1; - } - } - mnt->flags = flags; - return c; -} - -/* - * smb_show_options() is for displaying mount options in /proc/mounts. - * It tries to avoid showing settings that were not changed from their - * defaults. - */ -static int -smb_show_options(struct seq_file *s, struct vfsmount *m) -{ - struct smb_mount_data_kernel *mnt = SMB_SB(m->mnt_sb)->mnt; - int i; - - for (i = 0; opts[i].name != NULL; i++) - if (mnt->flags & opts[i].flag) - seq_printf(s, ",%s", opts[i].name); - - if (mnt->flags & SMB_MOUNT_UID) - seq_printf(s, ",uid=%d", mnt->uid); - if (mnt->flags & SMB_MOUNT_GID) - seq_printf(s, ",gid=%d", mnt->gid); - if (mnt->mounted_uid != 0) - seq_printf(s, ",mounted_uid=%d", mnt->mounted_uid); - - /* - * Defaults for file_mode and dir_mode are unknown to us; they - * depend on the current umask of the user doing the mount. - */ - if (mnt->flags & SMB_MOUNT_FMODE) - seq_printf(s, ",file_mode=%04o", mnt->file_mode & S_IRWXUGO); - if (mnt->flags & SMB_MOUNT_DMODE) - seq_printf(s, ",dir_mode=%04o", mnt->dir_mode & S_IRWXUGO); - - if (strcmp(mnt->codepage.local_name, CONFIG_NLS_DEFAULT)) - seq_printf(s, ",iocharset=%s", mnt->codepage.local_name); - if (strcmp(mnt->codepage.remote_name, SMB_NLS_REMOTE)) - seq_printf(s, ",codepage=%s", mnt->codepage.remote_name); - - if (mnt->ttl != SMB_TTL_DEFAULT) - seq_printf(s, ",ttl=%d", mnt->ttl); - - return 0; -} - -static void -smb_unload_nls(struct smb_sb_info *server) -{ - unload_nls(server->remote_nls); - unload_nls(server->local_nls); -} - -static void -smb_put_super(struct super_block *sb) -{ - struct smb_sb_info *server = SMB_SB(sb); - - lock_kernel(); - - smb_lock_server(server); - server->state = CONN_INVALID; - smbiod_unregister_server(server); - - smb_close_socket(server); - - if (server->conn_pid) - kill_pid(server->conn_pid, SIGTERM, 1); - - bdi_destroy(&server->bdi); - kfree(server->ops); - smb_unload_nls(server); - sb->s_fs_info = NULL; - smb_unlock_server(server); - put_pid(server->conn_pid); - kfree(server); - - unlock_kernel(); -} - -static int smb_fill_super(struct super_block *sb, void *raw_data, int silent) -{ - struct smb_sb_info *server; - struct smb_mount_data_kernel *mnt; - struct smb_mount_data *oldmnt; - struct inode *root_inode; - struct smb_fattr root; - int ver; - void *mem; - static int warn_count; - - lock_kernel(); - - if (warn_count < 5) { - warn_count++; - printk(KERN_EMERG "smbfs is deprecated and will be removed" - " from the 2.6.27 kernel. Please migrate to cifs\n"); - } - - if (!raw_data) - goto out_no_data; - - oldmnt = (struct smb_mount_data *) raw_data; - ver = oldmnt->version; - if (ver != SMB_MOUNT_OLDVERSION && cpu_to_be32(ver) != SMB_MOUNT_ASCII) - goto out_wrong_data; - - sb->s_flags |= MS_NODIRATIME; - sb->s_blocksize = 1024; /* Eh... Is this correct? */ - sb->s_blocksize_bits = 10; - sb->s_magic = SMB_SUPER_MAGIC; - sb->s_op = &smb_sops; - sb->s_time_gran = 100; - - server = kzalloc(sizeof(struct smb_sb_info), GFP_KERNEL); - if (!server) - goto out_no_server; - sb->s_fs_info = server; - - if (bdi_setup_and_register(&server->bdi, "smbfs", BDI_CAP_MAP_COPY)) - goto out_bdi; - - sb->s_bdi = &server->bdi; - - server->super_block = sb; - server->mnt = NULL; - server->sock_file = NULL; - init_waitqueue_head(&server->conn_wq); - init_MUTEX(&server->sem); - INIT_LIST_HEAD(&server->entry); - INIT_LIST_HEAD(&server->xmitq); - INIT_LIST_HEAD(&server->recvq); - server->conn_error = 0; - server->conn_pid = NULL; - server->state = CONN_INVALID; /* no connection yet */ - server->generation = 0; - - /* Allocate the global temp buffer and some superblock helper structs */ - /* FIXME: move these to the smb_sb_info struct */ - VERBOSE("alloc chunk = %lu\n", sizeof(struct smb_ops) + - sizeof(struct smb_mount_data_kernel)); - mem = kmalloc(sizeof(struct smb_ops) + - sizeof(struct smb_mount_data_kernel), GFP_KERNEL); - if (!mem) - goto out_no_mem; - - server->ops = mem; - smb_install_null_ops(server->ops); - server->mnt = mem + sizeof(struct smb_ops); - - /* Setup NLS stuff */ - server->remote_nls = NULL; - server->local_nls = NULL; - - mnt = server->mnt; - - memset(mnt, 0, sizeof(struct smb_mount_data_kernel)); - strlcpy(mnt->codepage.local_name, CONFIG_NLS_DEFAULT, - SMB_NLS_MAXNAMELEN); - strlcpy(mnt->codepage.remote_name, SMB_NLS_REMOTE, - SMB_NLS_MAXNAMELEN); - - mnt->ttl = SMB_TTL_DEFAULT; - if (ver == SMB_MOUNT_OLDVERSION) { - mnt->version = oldmnt->version; - - SET_UID(mnt->uid, oldmnt->uid); - SET_GID(mnt->gid, oldmnt->gid); - - mnt->file_mode = (oldmnt->file_mode & S_IRWXUGO) | S_IFREG; - mnt->dir_mode = (oldmnt->dir_mode & S_IRWXUGO) | S_IFDIR; - - mnt->flags = (oldmnt->file_mode >> 9) | SMB_MOUNT_UID | - SMB_MOUNT_GID | SMB_MOUNT_FMODE | SMB_MOUNT_DMODE; - } else { - mnt->file_mode = S_IRWXU | S_IRGRP | S_IXGRP | - S_IROTH | S_IXOTH | S_IFREG; - mnt->dir_mode = S_IRWXU | S_IRGRP | S_IXGRP | - S_IROTH | S_IXOTH | S_IFDIR; - if (parse_options(mnt, raw_data)) - goto out_bad_option; - } - mnt->mounted_uid = current_uid(); - smb_setcodepage(server, &mnt->codepage); - - /* - * Display the enabled options - * Note: smb_proc_getattr uses these in 2.4 (but was changed in 2.2) - */ - if (mnt->flags & SMB_MOUNT_OLDATTR) - printk("SMBFS: Using core getattr (Win 95 speedup)\n"); - else if (mnt->flags & SMB_MOUNT_DIRATTR) - printk("SMBFS: Using dir ff getattr\n"); - - if (smbiod_register_server(server) < 0) { - printk(KERN_ERR "smbfs: failed to start smbiod\n"); - goto out_no_smbiod; - } - - /* - * Keep the super block locked while we get the root inode. - */ - smb_init_root_dirent(server, &root, sb); - root_inode = smb_iget(sb, &root); - if (!root_inode) - goto out_no_root; - - sb->s_root = d_alloc_root(root_inode); - if (!sb->s_root) - goto out_no_root; - - smb_new_dentry(sb->s_root); - - unlock_kernel(); - return 0; - -out_no_root: - iput(root_inode); -out_no_smbiod: - smb_unload_nls(server); -out_bad_option: - kfree(mem); -out_no_mem: - bdi_destroy(&server->bdi); -out_bdi: - if (!server->mnt) - printk(KERN_ERR "smb_fill_super: allocation failure\n"); - sb->s_fs_info = NULL; - kfree(server); - goto out_fail; -out_wrong_data: - printk(KERN_ERR "smbfs: mount_data version %d is not supported\n", ver); - goto out_fail; -out_no_data: - printk(KERN_ERR "smb_fill_super: missing data argument\n"); -out_fail: - unlock_kernel(); - return -EINVAL; -out_no_server: - printk(KERN_ERR "smb_fill_super: cannot allocate struct smb_sb_info\n"); - unlock_kernel(); - return -ENOMEM; -} - -static int -smb_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - int result; - - lock_kernel(); - - result = smb_proc_dskattr(dentry, buf); - - unlock_kernel(); - - buf->f_type = SMB_SUPER_MAGIC; - buf->f_namelen = SMB_MAXPATHLEN; - return result; -} - -int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) -{ - int err = smb_revalidate_inode(dentry); - if (!err) - generic_fillattr(dentry->d_inode, stat); - return err; -} - -int -smb_notify_change(struct dentry *dentry, struct iattr *attr) -{ - struct inode *inode = dentry->d_inode; - struct smb_sb_info *server = server_from_dentry(dentry); - unsigned int mask = (S_IFREG | S_IFDIR | S_IRWXUGO); - int error, changed, refresh = 0; - struct smb_fattr fattr; - - lock_kernel(); - - error = smb_revalidate_inode(dentry); - if (error) - goto out; - - if ((error = inode_change_ok(inode, attr)) < 0) - goto out; - - error = -EPERM; - if ((attr->ia_valid & ATTR_UID) && (attr->ia_uid != server->mnt->uid)) - goto out; - - if ((attr->ia_valid & ATTR_GID) && (attr->ia_uid != server->mnt->gid)) - goto out; - - if ((attr->ia_valid & ATTR_MODE) && (attr->ia_mode & ~mask)) - goto out; - - if ((attr->ia_valid & ATTR_SIZE) != 0) { - VERBOSE("changing %s/%s, old size=%ld, new size=%ld\n", - DENTRY_PATH(dentry), - (long) inode->i_size, (long) attr->ia_size); - - filemap_write_and_wait(inode->i_mapping); - - error = smb_open(dentry, O_WRONLY); - if (error) - goto out; - error = server->ops->truncate(inode, attr->ia_size); - if (error) - goto out; - truncate_setsize(inode, attr->ia_size); - refresh = 1; - } - - if (server->opt.capabilities & SMB_CAP_UNIX) { - /* For now we don't want to set the size with setattr_unix */ - attr->ia_valid &= ~ATTR_SIZE; - /* FIXME: only call if we actually want to set something? */ - error = smb_proc_setattr_unix(dentry, attr, 0, 0); - if (!error) - refresh = 1; - - goto out; - } - - /* - * Initialize the fattr and check for changed fields. - * Note: CTIME under SMB is creation time rather than - * change time, so we don't attempt to change it. - */ - smb_get_inode_attr(inode, &fattr); - - changed = 0; - if ((attr->ia_valid & ATTR_MTIME) != 0) { - fattr.f_mtime = attr->ia_mtime; - changed = 1; - } - if ((attr->ia_valid & ATTR_ATIME) != 0) { - fattr.f_atime = attr->ia_atime; - /* Earlier protocols don't have an access time */ - if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) - changed = 1; - } - if (changed) { - error = smb_proc_settime(dentry, &fattr); - if (error) - goto out; - refresh = 1; - } - - /* - * Check for mode changes ... we're extremely limited in - * what can be set for SMB servers: just the read-only bit. - */ - if ((attr->ia_valid & ATTR_MODE) != 0) { - VERBOSE("%s/%s mode change, old=%x, new=%x\n", - DENTRY_PATH(dentry), fattr.f_mode, attr->ia_mode); - changed = 0; - if (attr->ia_mode & S_IWUSR) { - if (fattr.attr & aRONLY) { - fattr.attr &= ~aRONLY; - changed = 1; - } - } else { - if (!(fattr.attr & aRONLY)) { - fattr.attr |= aRONLY; - changed = 1; - } - } - if (changed) { - error = smb_proc_setattr(dentry, &fattr); - if (error) - goto out; - refresh = 1; - } - } - error = 0; - -out: - if (refresh) - smb_refresh_inode(dentry); - unlock_kernel(); - return error; -} - -static int smb_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) -{ - return get_sb_nodev(fs_type, flags, data, smb_fill_super, mnt); -} - -static struct file_system_type smb_fs_type = { - .owner = THIS_MODULE, - .name = "smbfs", - .get_sb = smb_get_sb, - .kill_sb = kill_anon_super, - .fs_flags = FS_BINARY_MOUNTDATA, -}; - -static int __init init_smb_fs(void) -{ - int err; - DEBUG1("registering ...\n"); - - err = init_inodecache(); - if (err) - goto out_inode; - err = smb_init_request_cache(); - if (err) - goto out_request; - err = register_filesystem(&smb_fs_type); - if (err) - goto out; - return 0; -out: - smb_destroy_request_cache(); -out_request: - destroy_inodecache(); -out_inode: - return err; -} - -static void __exit exit_smb_fs(void) -{ - DEBUG1("unregistering ...\n"); - unregister_filesystem(&smb_fs_type); - smb_destroy_request_cache(); - destroy_inodecache(); -} - -module_init(init_smb_fs) -module_exit(exit_smb_fs) -MODULE_LICENSE("GPL"); diff --git a/fs/smbfs/ioctl.c b/fs/smbfs/ioctl.c deleted file mode 100644 index 0721531..0000000 --- a/fs/smbfs/ioctl.c +++ /dev/null @@ -1,69 +0,0 @@ -/* - * ioctl.c - * - * Copyright (C) 1995, 1996 by Volker Lendecke - * Copyright (C) 1997 by Volker Lendecke - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/ioctl.h> -#include <linux/time.h> -#include <linux/mm.h> -#include <linux/highuid.h> -#include <linux/smp_lock.h> -#include <linux/net.h> - -#include <linux/smb_fs.h> -#include <linux/smb_mount.h> - -#include <asm/uaccess.h> - -#include "proto.h" - -long -smb_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - struct smb_sb_info *server = server_from_inode(filp->f_path.dentry->d_inode); - struct smb_conn_opt opt; - int result = -EINVAL; - - lock_kernel(); - switch (cmd) { - uid16_t uid16; - uid_t uid32; - case SMB_IOC_GETMOUNTUID: - SET_UID(uid16, server->mnt->mounted_uid); - result = put_user(uid16, (uid16_t __user *) arg); - break; - case SMB_IOC_GETMOUNTUID32: - SET_UID(uid32, server->mnt->mounted_uid); - result = put_user(uid32, (uid_t __user *) arg); - break; - - case SMB_IOC_NEWCONN: - /* arg is smb_conn_opt, or NULL if no connection was made */ - if (!arg) { - result = 0; - smb_lock_server(server); - server->state = CONN_RETRIED; - printk(KERN_ERR "Connection attempt failed! [%d]\n", - server->conn_error); - smbiod_flush(server); - smb_unlock_server(server); - break; - } - - result = -EFAULT; - if (!copy_from_user(&opt, (void __user *)arg, sizeof(opt))) - result = smb_newconn(server, &opt); - break; - default: - break; - } - unlock_kernel(); - - return result; -} diff --git a/fs/smbfs/proc.c b/fs/smbfs/proc.c deleted file mode 100644 index 3dcf638..0000000 --- a/fs/smbfs/proc.c +++ /dev/null @@ -1,3503 +0,0 @@ -/* - * proc.c - * - * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke - * Copyright (C) 1997 by Volker Lendecke - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/types.h> -#include <linux/capability.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/fs.h> -#include <linux/file.h> -#include <linux/stat.h> -#include <linux/fcntl.h> -#include <linux/dcache.h> -#include <linux/nls.h> -#include <linux/smp_lock.h> -#include <linux/net.h> -#include <linux/vfs.h> -#include <linux/smb_fs.h> -#include <linux/smbno.h> -#include <linux/smb_mount.h> - -#include <net/sock.h> - -#include <asm/string.h> -#include <asm/div64.h> - -#include "smb_debug.h" -#include "proto.h" -#include "request.h" - - -/* Features. Undefine if they cause problems, this should perhaps be a - config option. */ -#define SMBFS_POSIX_UNLINK 1 - -/* Allow smb_retry to be interrupted. */ -#define SMB_RETRY_INTR - -#define SMB_VWV(packet) ((packet) + SMB_HEADER_LEN) -#define SMB_CMD(packet) (*(packet+8)) -#define SMB_WCT(packet) (*(packet+SMB_HEADER_LEN - 1)) - -#define SMB_DIRINFO_SIZE 43 -#define SMB_STATUS_SIZE 21 - -#define SMB_ST_BLKSIZE (PAGE_SIZE) -#define SMB_ST_BLKSHIFT (PAGE_SHIFT) - -static struct smb_ops smb_ops_core; -static struct smb_ops smb_ops_os2; -static struct smb_ops smb_ops_win95; -static struct smb_ops smb_ops_winNT; -static struct smb_ops smb_ops_unix; -static struct smb_ops smb_ops_null; - -static void -smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr); -static void -smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr); -static int -smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *fattr); -static int -smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry, - struct smb_fattr *fattr); -static int -smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry, - u16 attr); -static int -smb_proc_setattr_ext(struct smb_sb_info *server, - struct inode *inode, struct smb_fattr *fattr); -static int -smb_proc_query_cifsunix(struct smb_sb_info *server); -static void -install_ops(struct smb_ops *dst, struct smb_ops *src); - - -static void -str_upper(char *name, int len) -{ - while (len--) - { - if (*name >= 'a' && *name <= 'z') - *name -= ('a' - 'A'); - name++; - } -} - -#if 0 -static void -str_lower(char *name, int len) -{ - while (len--) - { - if (*name >= 'A' && *name <= 'Z') - *name += ('a' - 'A'); - name++; - } -} -#endif - -/* reverse a string inline. This is used by the dircache walking routines */ -static void reverse_string(char *buf, int len) -{ - char c; - char *end = buf+len-1; - - while(buf < end) { - c = *buf; - *(buf++) = *end; - *(end--) = c; - } -} - -/* no conversion, just a wrapper for memcpy. */ -static int convert_memcpy(unsigned char *output, int olen, - const unsigned char *input, int ilen, - struct nls_table *nls_from, - struct nls_table *nls_to) -{ - if (olen < ilen) - return -ENAMETOOLONG; - memcpy(output, input, ilen); - return ilen; -} - -static inline int write_char(unsigned char ch, char *output, int olen) -{ - if (olen < 4) - return -ENAMETOOLONG; - sprintf(output, ":x%02x", ch); - return 4; -} - -static inline int write_unichar(wchar_t ch, char *output, int olen) -{ - if (olen < 5) - return -ENAMETOOLONG; - sprintf(output, ":%04x", ch); - return 5; -} - -/* convert from one "codepage" to another (possibly being utf8). */ -static int convert_cp(unsigned char *output, int olen, - const unsigned char *input, int ilen, - struct nls_table *nls_from, - struct nls_table *nls_to) -{ - int len = 0; - int n; - wchar_t ch; - - while (ilen > 0) { - /* convert by changing to unicode and back to the new cp */ - n = nls_from->char2uni(input, ilen, &ch); - if (n == -EINVAL) { - ilen--; - n = write_char(*input++, output, olen); - if (n < 0) - goto fail; - output += n; - olen -= n; - len += n; - continue; - } else if (n < 0) - goto fail; - input += n; - ilen -= n; - - n = nls_to->uni2char(ch, output, olen); - if (n == -EINVAL) - n = write_unichar(ch, output, olen); - if (n < 0) - goto fail; - output += n; - olen -= n; - - len += n; - } - return len; -fail: - return n; -} - -/* ----------------------------------------------------------- */ - -/* - * nls_unicode - * - * This encodes/decodes little endian unicode format - */ - -static int uni2char(wchar_t uni, unsigned char *out, int boundlen) -{ - if (boundlen < 2) - return -EINVAL; - *out++ = uni & 0xff; - *out++ = uni >> 8; - return 2; -} - -static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni) -{ - if (boundlen < 2) - return -EINVAL; - *uni = (rawstring[1] << 8) | rawstring[0]; - return 2; -} - -static struct nls_table unicode_table = { - .charset = "unicode", - .uni2char = uni2char, - .char2uni = char2uni, -}; - -/* ----------------------------------------------------------- */ - -static int setcodepage(struct nls_table **p, char *name) -{ - struct nls_table *nls; - - if (!name || !*name) { - nls = NULL; - } else if ( (nls = load_nls(name)) == NULL) { - printk (KERN_ERR "smbfs: failed to load nls '%s'\n", name); - return -EINVAL; - } - - /* if already set, unload the previous one. */ - if (*p && *p != &unicode_table) - unload_nls(*p); - *p = nls; - - return 0; -} - -/* Handles all changes to codepage settings. */ -int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp) -{ - int n = 0; - - smb_lock_server(server); - - /* Don't load any nls_* at all, if no remote is requested */ - if (!*cp->remote_name) - goto out; - - /* local */ - n = setcodepage(&server->local_nls, cp->local_name); - if (n != 0) - goto out; - - /* remote */ - if (!strcmp(cp->remote_name, "unicode")) { - server->remote_nls = &unicode_table; - } else { - n = setcodepage(&server->remote_nls, cp->remote_name); - if (n != 0) - setcodepage(&server->local_nls, NULL); - } - -out: - if (server->local_nls != NULL && server->remote_nls != NULL) - server->ops->convert = convert_cp; - else - server->ops->convert = convert_memcpy; - - smb_unlock_server(server); - return n; -} - - -/*****************************************************************************/ -/* */ -/* Encoding/Decoding section */ -/* */ -/*****************************************************************************/ - -static __u8 * -smb_encode_smb_length(__u8 * p, __u32 len) -{ - *p = 0; - *(p+1) = 0; - *(p+2) = (len & 0xFF00) >> 8; - *(p+3) = (len & 0xFF); - if (len > 0xFFFF) - { - *(p+1) = 1; - } - return p + 4; -} - -/* - * smb_build_path: build the path to entry and name storing it in buf. - * The path returned will have the trailing '\0'. - */ -static int smb_build_path(struct smb_sb_info *server, unsigned char *buf, - int maxlen, - struct dentry *entry, struct qstr *name) -{ - unsigned char *path = buf; - int len; - int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE) != 0; - - if (maxlen < (2<<unicode)) - return -ENAMETOOLONG; - - if (maxlen > SMB_MAXPATHLEN + 1) - maxlen = SMB_MAXPATHLEN + 1; - - if (entry == NULL) - goto test_name_and_out; - - /* - * If IS_ROOT, we have to do no walking at all. - */ - if (IS_ROOT(entry) && !name) { - *path++ = '\\'; - if (unicode) *path++ = '\0'; - *path++ = '\0'; - if (unicode) *path++ = '\0'; - return path-buf; - } - - /* - * Build the path string walking the tree backward from end to ROOT - * and store it in reversed order [see reverse_string()] - */ - dget(entry); - while (!IS_ROOT(entry)) { - struct dentry *parent; - - if (maxlen < (3<<unicode)) { - dput(entry); - return -ENAMETOOLONG; - } - - spin_lock(&entry->d_lock); - len = server->ops->convert(path, maxlen-2, - entry->d_name.name, entry->d_name.len, - server->local_nls, server->remote_nls); - if (len < 0) { - spin_unlock(&entry->d_lock); - dput(entry); - return len; - } - reverse_string(path, len); - path += len; - if (unicode) { - /* Note: reverse order */ - *path++ = '\0'; - maxlen--; - } - *path++ = '\\'; - maxlen -= len+1; - spin_unlock(&entry->d_lock); - - parent = dget_parent(entry); - dput(entry); - entry = parent; - } - dput(entry); - reverse_string(buf, path-buf); - - /* maxlen has space for at least one char */ -test_name_and_out: - if (name) { - if (maxlen < (3<<unicode)) - return -ENAMETOOLONG; - *path++ = '\\'; - if (unicode) { - *path++ = '\0'; - maxlen--; - } - len = server->ops->convert(path, maxlen-2, - name->name, name->len, - server->local_nls, server->remote_nls); - if (len < 0) - return len; - path += len; - maxlen -= len+1; - } - /* maxlen has space for at least one char */ - *path++ = '\0'; - if (unicode) *path++ = '\0'; - return path-buf; -} - -static int smb_encode_path(struct smb_sb_info *server, char *buf, int maxlen, - struct dentry *dir, struct qstr *name) -{ - int result; - - result = smb_build_path(server, buf, maxlen, dir, name); - if (result < 0) - goto out; - if (server->opt.protocol <= SMB_PROTOCOL_COREPLUS) - str_upper(buf, result); -out: - return result; -} - -/* encode_path for non-trans2 request SMBs */ -static int smb_simple_encode_path(struct smb_request *req, char **p, - struct dentry * entry, struct qstr * name) -{ - struct smb_sb_info *server = req->rq_server; - char *s = *p; - int res; - int maxlen = ((char *)req->rq_buffer + req->rq_bufsize) - s; - int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE); - - if (!maxlen) - return -ENAMETOOLONG; - *s++ = 4; /* ASCII data format */ - - /* - * SMB Unicode strings must be 16bit aligned relative the start of the - * packet. If they are not they must be padded with 0. - */ - if (unicode) { - int align = s - (char *)req->rq_buffer; - if (!(align & 1)) { - *s++ = '\0'; - maxlen--; - } - } - - res = smb_encode_path(server, s, maxlen-1, entry, name); - if (res < 0) - return res; - *p = s + res; - return 0; -} - -/* The following are taken directly from msdos-fs */ - -/* Linear day numbers of the respective 1sts in non-leap years. */ - -static int day_n[] = -{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; - /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */ - - -static time_t -utc2local(struct smb_sb_info *server, time_t time) -{ - return time - server->opt.serverzone*60; -} - -static time_t -local2utc(struct smb_sb_info *server, time_t time) -{ - return time + server->opt.serverzone*60; -} - -/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ - -static time_t -date_dos2unix(struct smb_sb_info *server, __u16 date, __u16 time) -{ - int month, year; - time_t secs; - - /* first subtract and mask after that... Otherwise, if - date == 0, bad things happen */ - month = ((date >> 5) - 1) & 15; - year = date >> 9; - secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + 86400 * - ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 - ((year & 3) == 0 && - month < 2 ? 1 : 0) + 3653); - /* days since 1.1.70 plus 80's leap day */ - return local2utc(server, secs); -} - - -/* Convert linear UNIX date to a MS-DOS time/date pair. */ - -static void -date_unix2dos(struct smb_sb_info *server, - int unix_date, __u16 *date, __u16 *time) -{ - int day, year, nl_day, month; - - unix_date = utc2local(server, unix_date); - if (unix_date < 315532800) - unix_date = 315532800; - - *time = (unix_date % 60) / 2 + - (((unix_date / 60) % 60) << 5) + - (((unix_date / 3600) % 24) << 11); - - day = unix_date / 86400 - 3652; - year = day / 365; - if ((year + 3) / 4 + 365 * year > day) - year--; - day -= (year + 3) / 4 + 365 * year; - if (day == 59 && !(year & 3)) { - nl_day = day; - month = 2; - } else { - nl_day = (year & 3) || day <= 59 ? day : day - 1; - for (month = 1; month < 12; month++) - if (day_n[month] > nl_day) - break; - } - *date = nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9); -} - -/* The following are taken from fs/ntfs/util.c */ - -#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000) - -/* - * Convert the NT UTC (based 1601-01-01, in hundred nanosecond units) - * into Unix UTC (based 1970-01-01, in seconds). - */ -static struct timespec -smb_ntutc2unixutc(u64 ntutc) -{ - struct timespec ts; - /* FIXME: what about the timezone difference? */ - /* Subtract the NTFS time offset, then convert to 1s intervals. */ - u64 t = ntutc - NTFS_TIME_OFFSET; - ts.tv_nsec = do_div(t, 10000000) * 100; - ts.tv_sec = t; - return ts; -} - -/* Convert the Unix UTC into NT time */ -static u64 -smb_unixutc2ntutc(struct timespec ts) -{ - /* Note: timezone conversion is probably wrong. */ - /* return ((u64)utc2local(server, t)) * 10000000 + NTFS_TIME_OFFSET; */ - return ((u64)ts.tv_sec) * 10000000 + ts.tv_nsec/100 + NTFS_TIME_OFFSET; -} - -#define MAX_FILE_MODE 6 -static mode_t file_mode[] = { - S_IFREG, S_IFDIR, S_IFLNK, S_IFCHR, S_IFBLK, S_IFIFO, S_IFSOCK -}; - -static int smb_filetype_to_mode(u32 filetype) -{ - if (filetype > MAX_FILE_MODE) { - PARANOIA("Filetype out of range: %d\n", filetype); - return S_IFREG; - } - return file_mode[filetype]; -} - -static u32 smb_filetype_from_mode(int mode) -{ - if (S_ISREG(mode)) - return UNIX_TYPE_FILE; - if (S_ISDIR(mode)) - return UNIX_TYPE_DIR; - if (S_ISLNK(mode)) - return UNIX_TYPE_SYMLINK; - if (S_ISCHR(mode)) - return UNIX_TYPE_CHARDEV; - if (S_ISBLK(mode)) - return UNIX_TYPE_BLKDEV; - if (S_ISFIFO(mode)) - return UNIX_TYPE_FIFO; - if (S_ISSOCK(mode)) - return UNIX_TYPE_SOCKET; - return UNIX_TYPE_UNKNOWN; -} - - -/*****************************************************************************/ -/* */ -/* Support section. */ -/* */ -/*****************************************************************************/ - -__u32 -smb_len(__u8 * p) -{ - return ((*(p+1) & 0x1) << 16L) | (*(p+2) << 8L) | *(p+3); -} - -static __u16 -smb_bcc(__u8 * packet) -{ - int pos = SMB_HEADER_LEN + SMB_WCT(packet) * sizeof(__u16); - return WVAL(packet, pos); -} - -/* smb_valid_packet: We check if packet fulfills the basic - requirements of a smb packet */ - -static int -smb_valid_packet(__u8 * packet) -{ - return (packet[4] == 0xff - && packet[5] == 'S' - && packet[6] == 'M' - && packet[7] == 'B' - && (smb_len(packet) + 4 == SMB_HEADER_LEN - + SMB_WCT(packet) * 2 + smb_bcc(packet))); -} - -/* smb_verify: We check if we got the answer we expected, and if we - got enough data. If bcc == -1, we don't care. */ - -static int -smb_verify(__u8 * packet, int command, int wct, int bcc) -{ - if (SMB_CMD(packet) != command) - goto bad_command; - if (SMB_WCT(packet) < wct) - goto bad_wct; - if (bcc != -1 && smb_bcc(packet) < bcc) - goto bad_bcc; - return 0; - -bad_command: - printk(KERN_ERR "smb_verify: command=%x, SMB_CMD=%x??\n", - command, SMB_CMD(packet)); - goto fail; -bad_wct: - printk(KERN_ERR "smb_verify: command=%x, wct=%d, SMB_WCT=%d??\n", - command, wct, SMB_WCT(packet)); - goto fail; -bad_bcc: - printk(KERN_ERR "smb_verify: command=%x, bcc=%d, SMB_BCC=%d??\n", - command, bcc, smb_bcc(packet)); -fail: - return -EIO; -} - -/* - * Returns the maximum read or write size for the "payload". Making all of the - * packet fit within the negotiated max_xmit size. - * - * N.B. Since this value is usually computed before locking the server, - * the server's packet size must never be decreased! - */ -static inline int -smb_get_xmitsize(struct smb_sb_info *server, int overhead) -{ - return server->opt.max_xmit - overhead; -} - -/* - * Calculate the maximum read size - */ -int -smb_get_rsize(struct smb_sb_info *server) -{ - /* readX has 12 parameters, read has 5 */ - int overhead = SMB_HEADER_LEN + 12 * sizeof(__u16) + 2 + 1 + 2; - int size = smb_get_xmitsize(server, overhead); - - VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size); - - return size; -} - -/* - * Calculate the maximum write size - */ -int -smb_get_wsize(struct smb_sb_info *server) -{ - /* writeX has 14 parameters, write has 5 */ - int overhead = SMB_HEADER_LEN + 14 * sizeof(__u16) + 2 + 1 + 2; - int size = smb_get_xmitsize(server, overhead); - - VERBOSE("xmit=%d, size=%d\n", server->opt.max_xmit, size); - - return size; -} - -/* - * Convert SMB error codes to -E... errno values. - */ -int -smb_errno(struct smb_request *req) -{ - int errcls = req->rq_rcls; - int error = req->rq_err; - char *class = "Unknown"; - - VERBOSE("errcls %d code %d from command 0x%x\n", - errcls, error, SMB_CMD(req->rq_header)); - - if (errcls == ERRDOS) { - switch (error) { - case ERRbadfunc: - return -EINVAL; - case ERRbadfile: - case ERRbadpath: - return -ENOENT; - case ERRnofids: - return -EMFILE; - case ERRnoaccess: - return -EACCES; - case ERRbadfid: - return -EBADF; - case ERRbadmcb: - return -EREMOTEIO; - case ERRnomem: - return -ENOMEM; - case ERRbadmem: - return -EFAULT; - case ERRbadenv: - case ERRbadformat: - return -EREMOTEIO; - case ERRbadaccess: - return -EACCES; - case ERRbaddata: - return -E2BIG; - case ERRbaddrive: - return -ENXIO; - case ERRremcd: - return -EREMOTEIO; - case ERRdiffdevice: - return -EXDEV; - case ERRnofiles: - return -ENOENT; - case ERRbadshare: - return -ETXTBSY; - case ERRlock: - return -EDEADLK; - case ERRfilexists: - return -EEXIST; - case ERROR_INVALID_PARAMETER: - return -EINVAL; - case ERROR_DISK_FULL: - return -ENOSPC; - case ERROR_INVALID_NAME: - return -ENOENT; - case ERROR_DIR_NOT_EMPTY: - return -ENOTEMPTY; - case ERROR_NOT_LOCKED: - return -ENOLCK; - case ERROR_ALREADY_EXISTS: - return -EEXIST; - default: - class = "ERRDOS"; - goto err_unknown; - } - } else if (errcls == ERRSRV) { - switch (error) { - /* N.B. This is wrong ... EIO ? */ - case ERRerror: - return -ENFILE; - case ERRbadpw: - return -EINVAL; - case ERRbadtype: - case ERRtimeout: - return -EIO; - case ERRaccess: - return -EACCES; - /* - * This is a fatal error, as it means the "tree ID" - * for this connection is no longer valid. We map - * to a special error code and get a new connection. - */ - case ERRinvnid: - return -EBADSLT; - default: - class = "ERRSRV"; - goto err_unknown; - } - } else if (errcls == ERRHRD) { - switch (error) { - case ERRnowrite: - return -EROFS; - case ERRbadunit: - return -ENODEV; - case ERRnotready: - return -EUCLEAN; - case ERRbadcmd: - case ERRdata: - return -EIO; - case ERRbadreq: - return -ERANGE; - case ERRbadshare: - return -ETXTBSY; - case ERRlock: - return -EDEADLK; - case ERRdiskfull: - return -ENOSPC; - default: - class = "ERRHRD"; - goto err_unknown; - } - } else if (errcls == ERRCMD) { - class = "ERRCMD"; - } else if (errcls == SUCCESS) { - return 0; /* This is the only valid 0 return */ - } - -err_unknown: - printk(KERN_ERR "smb_errno: class %s, code %d from command 0x%x\n", - class, error, SMB_CMD(req->rq_header)); - return -EIO; -} - -/* smb_request_ok: We expect the server to be locked. Then we do the - request and check the answer completely. When smb_request_ok - returns 0, you can be quite sure that everything went well. When - the answer is <=0, the returned number is a valid unix errno. */ - -static int -smb_request_ok(struct smb_request *req, int command, int wct, int bcc) -{ - int result; - - req->rq_resp_wct = wct; - req->rq_resp_bcc = bcc; - - result = smb_add_request(req); - if (result != 0) { - DEBUG1("smb_request failed\n"); - goto out; - } - - if (smb_valid_packet(req->rq_header) != 0) { - PARANOIA("invalid packet!\n"); - goto out; - } - - result = smb_verify(req->rq_header, command, wct, bcc); - -out: - return result; -} - -/* - * This implements the NEWCONN ioctl. It installs the server pid, - * sets server->state to CONN_VALID, and wakes up the waiting process. - */ -int -smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt) -{ - struct file *filp; - struct sock *sk; - int error; - - VERBOSE("fd=%d, pid=%d\n", opt->fd, current->pid); - - smb_lock_server(server); - - /* - * Make sure we don't already have a valid connection ... - */ - error = -EINVAL; - if (server->state == CONN_VALID) - goto out; - - error = -EACCES; - if (current_uid() != server->mnt->mounted_uid && - !capable(CAP_SYS_ADMIN)) - goto out; - - error = -EBADF; - filp = fget(opt->fd); - if (!filp) - goto out; - if (!smb_valid_socket(filp->f_path.dentry->d_inode)) - goto out_putf; - - server->sock_file = filp; - server->conn_pid = get_pid(task_pid(current)); - server->opt = *opt; - server->generation += 1; - server->state = CONN_VALID; - error = 0; - - if (server->conn_error) { - /* - * conn_error is the returncode we originally decided to - * drop the old connection on. This message should be positive - * and not make people ask questions on why smbfs is printing - * error messages ... - */ - printk(KERN_INFO "SMB connection re-established (%d)\n", - server->conn_error); - server->conn_error = 0; - } - - /* - * Store the server in sock user_data (Only used by sunrpc) - */ - sk = SOCKET_I(filp->f_path.dentry->d_inode)->sk; - sk->sk_user_data = server; - - /* chain into the data_ready callback */ - server->data_ready = xchg(&sk->sk_data_ready, smb_data_ready); - - /* check if we have an old smbmount that uses seconds for the - serverzone */ - if (server->opt.serverzone > 12*60 || server->opt.serverzone < -12*60) - server->opt.serverzone /= 60; - - /* now that we have an established connection we can detect the server - type and enable bug workarounds */ - if (server->opt.protocol < SMB_PROTOCOL_LANMAN2) - install_ops(server->ops, &smb_ops_core); - else if (server->opt.protocol == SMB_PROTOCOL_LANMAN2) - install_ops(server->ops, &smb_ops_os2); - else if (server->opt.protocol == SMB_PROTOCOL_NT1 && - (server->opt.max_xmit < 0x1000) && - !(server->opt.capabilities & SMB_CAP_NT_SMBS)) { - /* FIXME: can we kill the WIN95 flag now? */ - server->mnt->flags |= SMB_MOUNT_WIN95; - VERBOSE("detected WIN95 server\n"); - install_ops(server->ops, &smb_ops_win95); - } else { - /* - * Samba has max_xmit 65535 - * NT4spX has max_xmit 4536 (or something like that) - * win2k has ... - */ - VERBOSE("detected NT1 (Samba, NT4/5) server\n"); - install_ops(server->ops, &smb_ops_winNT); - } - - /* FIXME: the win9x code wants to modify these ... (seek/trunc bug) */ - if (server->mnt->flags & SMB_MOUNT_OLDATTR) { - server->ops->getattr = smb_proc_getattr_core; - } else if (server->mnt->flags & SMB_MOUNT_DIRATTR) { - server->ops->getattr = smb_proc_getattr_ff; - } - - /* Decode server capabilities */ - if (server->opt.capabilities & SMB_CAP_LARGE_FILES) { - /* Should be ok to set this now, as no one can access the - mount until the connection has been established. */ - SB_of(server)->s_maxbytes = ~0ULL >> 1; - VERBOSE("LFS enabled\n"); - } - if (server->opt.capabilities & SMB_CAP_UNICODE) { - server->mnt->flags |= SMB_MOUNT_UNICODE; - VERBOSE("Unicode enabled\n"); - } else { - server->mnt->flags &= ~SMB_MOUNT_UNICODE; - } -#if 0 - /* flags we may test for other patches ... */ - if (server->opt.capabilities & SMB_CAP_LARGE_READX) { - VERBOSE("Large reads enabled\n"); - } - if (server->opt.capabilities & SMB_CAP_LARGE_WRITEX) { - VERBOSE("Large writes enabled\n"); - } -#endif - if (server->opt.capabilities & SMB_CAP_UNIX) { - struct inode *inode; - VERBOSE("Using UNIX CIFS extensions\n"); - install_ops(server->ops, &smb_ops_unix); - inode = SB_of(server)->s_root->d_inode; - if (inode) - inode->i_op = &smb_dir_inode_operations_unix; - } - - VERBOSE("protocol=%d, max_xmit=%d, pid=%d capabilities=0x%x\n", - server->opt.protocol, server->opt.max_xmit, - pid_nr(server->conn_pid), server->opt.capabilities); - - /* FIXME: this really should be done by smbmount. */ - if (server->opt.max_xmit > SMB_MAX_PACKET_SIZE) { - server->opt.max_xmit = SMB_MAX_PACKET_SIZE; - } - - smb_unlock_server(server); - smbiod_wake_up(); - if (server->opt.capabilities & SMB_CAP_UNIX) - smb_proc_query_cifsunix(server); - - server->conn_complete++; - wake_up_interruptible_all(&server->conn_wq); - return error; - -out: - smb_unlock_server(server); - smbiod_wake_up(); - return error; - -out_putf: - fput(filp); - goto out; -} - -/* smb_setup_header: We completely set up the packet. You only have to - insert the command-specific fields */ - -__u8 * -smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc) -{ - __u32 xmit_len = SMB_HEADER_LEN + wct * sizeof(__u16) + bcc + 2; - __u8 *p = req->rq_header; - struct smb_sb_info *server = req->rq_server; - - p = smb_encode_smb_length(p, xmit_len - 4); - - *p++ = 0xff; - *p++ = 'S'; - *p++ = 'M'; - *p++ = 'B'; - *p++ = command; - - memset(p, '\0', 19); - p += 19; - p += 8; - - if (server->opt.protocol > SMB_PROTOCOL_CORE) { - int flags = SMB_FLAGS_CASELESS_PATHNAMES; - int flags2 = SMB_FLAGS2_LONG_PATH_COMPONENTS | - SMB_FLAGS2_EXTENDED_ATTRIBUTES; /* EA? not really ... */ - - *(req->rq_header + smb_flg) = flags; - if (server->mnt->flags & SMB_MOUNT_UNICODE) - flags2 |= SMB_FLAGS2_UNICODE_STRINGS; - WSET(req->rq_header, smb_flg2, flags2); - } - *p++ = wct; /* wct */ - p += 2 * wct; - WSET(p, 0, bcc); - - /* Include the header in the data to send */ - req->rq_iovlen = 1; - req->rq_iov[0].iov_base = req->rq_header; - req->rq_iov[0].iov_len = xmit_len - bcc; - - return req->rq_buffer; -} - -static void -smb_setup_bcc(struct smb_request *req, __u8 *p) -{ - u16 bcc = p - req->rq_buffer; - u8 *pbcc = req->rq_header + SMB_HEADER_LEN + 2*SMB_WCT(req->rq_header); - - WSET(pbcc, 0, bcc); - - smb_encode_smb_length(req->rq_header, SMB_HEADER_LEN + - 2*SMB_WCT(req->rq_header) - 2 + bcc); - - /* Include the "bytes" in the data to send */ - req->rq_iovlen = 2; - req->rq_iov[1].iov_base = req->rq_buffer; - req->rq_iov[1].iov_len = bcc; -} - -static int -smb_proc_seek(struct smb_sb_info *server, __u16 fileid, - __u16 mode, off_t offset) -{ - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBlseek, 4, 0); - WSET(req->rq_header, smb_vwv0, fileid); - WSET(req->rq_header, smb_vwv1, mode); - DSET(req->rq_header, smb_vwv2, offset); - req->rq_flags |= SMB_REQ_NORETRY; - - result = smb_request_ok(req, SMBlseek, 2, 0); - if (result < 0) { - result = 0; - goto out_free; - } - - result = DVAL(req->rq_header, smb_vwv0); -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_open(struct smb_sb_info *server, struct dentry *dentry, int wish) -{ - struct inode *ino = dentry->d_inode; - struct smb_inode_info *ei = SMB_I(ino); - int mode, read_write = 0x42, read_only = 0x40; - int res; - char *p; - struct smb_request *req; - - /* - * Attempt to open r/w, unless there are no write privileges. - */ - mode = read_write; - if (!(ino->i_mode & (S_IWUSR | S_IWGRP | S_IWOTH))) - mode = read_only; -#if 0 - /* FIXME: why is this code not in? below we fix it so that a caller - wanting RO doesn't get RW. smb_revalidate_inode does some - optimization based on access mode. tail -f needs it to be correct. - - We must open rw since we don't do the open if called a second time - with different 'wish'. Is that not supported by smb servers? */ - if (!(wish & (O_WRONLY | O_RDWR))) - mode = read_only; -#endif - - res = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - retry: - p = smb_setup_header(req, SMBopen, 2, 0); - WSET(req->rq_header, smb_vwv0, mode); - WSET(req->rq_header, smb_vwv1, aSYSTEM | aHIDDEN | aDIR); - res = smb_simple_encode_path(req, &p, dentry, NULL); - if (res < 0) - goto out_free; - smb_setup_bcc(req, p); - - res = smb_request_ok(req, SMBopen, 7, 0); - if (res != 0) { - if (mode == read_write && - (res == -EACCES || res == -ETXTBSY || res == -EROFS)) - { - VERBOSE("%s/%s R/W failed, error=%d, retrying R/O\n", - DENTRY_PATH(dentry), res); - mode = read_only; - req->rq_flags = 0; - goto retry; - } - goto out_free; - } - /* We should now have data in vwv[0..6]. */ - - ei->fileid = WVAL(req->rq_header, smb_vwv0); - ei->attr = WVAL(req->rq_header, smb_vwv1); - /* smb_vwv2 has mtime */ - /* smb_vwv4 has size */ - ei->access = (WVAL(req->rq_header, smb_vwv6) & SMB_ACCMASK); - ei->open = server->generation; - -out_free: - smb_rput(req); -out: - return res; -} - -/* - * Make sure the file is open, and check that the access - * is compatible with the desired access. - */ -int -smb_open(struct dentry *dentry, int wish) -{ - struct inode *inode = dentry->d_inode; - int result; - __u16 access; - - result = -ENOENT; - if (!inode) { - printk(KERN_ERR "smb_open: no inode for dentry %s/%s\n", - DENTRY_PATH(dentry)); - goto out; - } - - if (!smb_is_open(inode)) { - struct smb_sb_info *server = server_from_inode(inode); - result = 0; - if (!smb_is_open(inode)) - result = smb_proc_open(server, dentry, wish); - if (result) - goto out; - /* - * A successful open means the path is still valid ... - */ - smb_renew_times(dentry); - } - - /* - * Check whether the access is compatible with the desired mode. - */ - result = 0; - access = SMB_I(inode)->access; - if (access != wish && access != SMB_O_RDWR) { - PARANOIA("%s/%s access denied, access=%x, wish=%x\n", - DENTRY_PATH(dentry), access, wish); - result = -EACCES; - } -out: - return result; -} - -static int -smb_proc_close(struct smb_sb_info *server, __u16 fileid, __u32 mtime) -{ - struct smb_request *req; - int result = -ENOMEM; - - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBclose, 3, 0); - WSET(req->rq_header, smb_vwv0, fileid); - DSET(req->rq_header, smb_vwv1, utc2local(server, mtime)); - req->rq_flags |= SMB_REQ_NORETRY; - result = smb_request_ok(req, SMBclose, 0, 0); - - smb_rput(req); -out: - return result; -} - -/* - * Win NT 4.0 has an apparent bug in that it fails to update the - * modify time when writing to a file. As a workaround, we update - * both modify and access time locally, and post the times to the - * server when closing the file. - */ -static int -smb_proc_close_inode(struct smb_sb_info *server, struct inode * ino) -{ - struct smb_inode_info *ei = SMB_I(ino); - int result = 0; - if (smb_is_open(ino)) - { - /* - * We clear the open flag in advance, in case another - * process observes the value while we block below. - */ - ei->open = 0; - - /* - * Kludge alert: SMB timestamps are accurate only to - * two seconds ... round the times to avoid needless - * cache invalidations! - */ - if (ino->i_mtime.tv_sec & 1) { - ino->i_mtime.tv_sec--; - ino->i_mtime.tv_nsec = 0; - } - if (ino->i_atime.tv_sec & 1) { - ino->i_atime.tv_sec--; - ino->i_atime.tv_nsec = 0; - } - /* - * If the file is open with write permissions, - * update the time stamps to sync mtime and atime. - */ - if ((server->opt.capabilities & SMB_CAP_UNIX) == 0 && - (server->opt.protocol >= SMB_PROTOCOL_LANMAN2) && - !(ei->access == SMB_O_RDONLY)) - { - struct smb_fattr fattr; - smb_get_inode_attr(ino, &fattr); - smb_proc_setattr_ext(server, ino, &fattr); - } - - result = smb_proc_close(server, ei->fileid, ino->i_mtime.tv_sec); - /* - * Force a revalidation after closing ... some servers - * don't post the size until the file has been closed. - */ - if (server->opt.protocol < SMB_PROTOCOL_NT1) - ei->oldmtime = 0; - ei->closed = jiffies; - } - return result; -} - -int -smb_close(struct inode *ino) -{ - int result = 0; - - if (smb_is_open(ino)) { - struct smb_sb_info *server = server_from_inode(ino); - result = smb_proc_close_inode(server, ino); - } - return result; -} - -/* - * This is used to close a file following a failed instantiate. - * Since we don't have an inode, we can't use any of the above. - */ -int -smb_close_fileid(struct dentry *dentry, __u16 fileid) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - int result; - - result = smb_proc_close(server, fileid, get_seconds()); - return result; -} - -/* In smb_proc_read and smb_proc_write we do not retry, because the - file-id would not be valid after a reconnection. */ - -static void -smb_proc_read_data(struct smb_request *req) -{ - req->rq_iov[0].iov_base = req->rq_buffer; - req->rq_iov[0].iov_len = 3; - - req->rq_iov[1].iov_base = req->rq_page; - req->rq_iov[1].iov_len = req->rq_rsize; - req->rq_iovlen = 2; - - req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; -} - -static int -smb_proc_read(struct inode *inode, loff_t offset, int count, char *data) -{ - struct smb_sb_info *server = server_from_inode(inode); - __u16 returned_count, data_len; - unsigned char *buf; - int result; - struct smb_request *req; - u8 rbuf[4]; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBread, 5, 0); - buf = req->rq_header; - WSET(buf, smb_vwv0, SMB_I(inode)->fileid); - WSET(buf, smb_vwv1, count); - DSET(buf, smb_vwv2, offset); - WSET(buf, smb_vwv4, 0); - - req->rq_page = data; - req->rq_rsize = count; - req->rq_callback = smb_proc_read_data; - req->rq_buffer = rbuf; - req->rq_flags |= SMB_REQ_NORETRY | SMB_REQ_STATIC; - - result = smb_request_ok(req, SMBread, 5, -1); - if (result < 0) - goto out_free; - returned_count = WVAL(req->rq_header, smb_vwv0); - - data_len = WVAL(rbuf, 1); - - if (returned_count != data_len) { - printk(KERN_NOTICE "smb_proc_read: returned != data_len\n"); - printk(KERN_NOTICE "smb_proc_read: ret_c=%d, data_len=%d\n", - returned_count, data_len); - } - result = data_len; - -out_free: - smb_rput(req); -out: - VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n", - inode->i_ino, SMB_I(inode)->fileid, count, result); - return result; -} - -static int -smb_proc_write(struct inode *inode, loff_t offset, int count, const char *data) -{ - struct smb_sb_info *server = server_from_inode(inode); - int result; - u16 fileid = SMB_I(inode)->fileid; - u8 buf[4]; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n", - inode->i_ino, fileid, count, offset); - - smb_setup_header(req, SMBwrite, 5, count + 3); - WSET(req->rq_header, smb_vwv0, fileid); - WSET(req->rq_header, smb_vwv1, count); - DSET(req->rq_header, smb_vwv2, offset); - WSET(req->rq_header, smb_vwv4, 0); - - buf[0] = 1; - WSET(buf, 1, count); /* yes, again ... */ - req->rq_iov[1].iov_base = buf; - req->rq_iov[1].iov_len = 3; - req->rq_iov[2].iov_base = (char *) data; - req->rq_iov[2].iov_len = count; - req->rq_iovlen = 3; - req->rq_flags |= SMB_REQ_NORETRY; - - result = smb_request_ok(req, SMBwrite, 1, 0); - if (result >= 0) - result = WVAL(req->rq_header, smb_vwv0); - - smb_rput(req); -out: - return result; -} - -/* - * In smb_proc_readX and smb_proc_writeX we do not retry, because the - * file-id would not be valid after a reconnection. - */ - -#define SMB_READX_MAX_PAD 64 -static void -smb_proc_readX_data(struct smb_request *req) -{ - /* header length, excluding the netbios length (-4) */ - int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2; - int data_off = WVAL(req->rq_header, smb_vwv6); - - /* - * Some genius made the padding to the data bytes arbitrary. - * So we must first calculate the amount of padding used by the server. - */ - data_off -= hdrlen; - if (data_off > SMB_READX_MAX_PAD || data_off < 0) { - PARANOIA("offset is larger than SMB_READX_MAX_PAD or negative!\n"); - PARANOIA("%d > %d || %d < 0\n", data_off, SMB_READX_MAX_PAD, data_off); - req->rq_rlen = req->rq_bufsize + 1; - return; - } - req->rq_iov[0].iov_base = req->rq_buffer; - req->rq_iov[0].iov_len = data_off; - - req->rq_iov[1].iov_base = req->rq_page; - req->rq_iov[1].iov_len = req->rq_rsize; - req->rq_iovlen = 2; - - req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; -} - -static int -smb_proc_readX(struct inode *inode, loff_t offset, int count, char *data) -{ - struct smb_sb_info *server = server_from_inode(inode); - unsigned char *buf; - int result; - struct smb_request *req; - static char pad[SMB_READX_MAX_PAD]; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBreadX, 12, 0); - buf = req->rq_header; - WSET(buf, smb_vwv0, 0x00ff); - WSET(buf, smb_vwv1, 0); - WSET(buf, smb_vwv2, SMB_I(inode)->fileid); - DSET(buf, smb_vwv3, (u32)offset); /* low 32 bits */ - WSET(buf, smb_vwv5, count); - WSET(buf, smb_vwv6, 0); - DSET(buf, smb_vwv7, 0); - WSET(buf, smb_vwv9, 0); - DSET(buf, smb_vwv10, (u32)(offset >> 32)); /* high 32 bits */ - WSET(buf, smb_vwv11, 0); - - req->rq_page = data; - req->rq_rsize = count; - req->rq_callback = smb_proc_readX_data; - req->rq_buffer = pad; - req->rq_bufsize = SMB_READX_MAX_PAD; - req->rq_flags |= SMB_REQ_STATIC | SMB_REQ_NORETRY; - - result = smb_request_ok(req, SMBreadX, 12, -1); - if (result < 0) - goto out_free; - result = WVAL(req->rq_header, smb_vwv5); - -out_free: - smb_rput(req); -out: - VERBOSE("ino=%ld, fileid=%d, count=%d, result=%d\n", - inode->i_ino, SMB_I(inode)->fileid, count, result); - return result; -} - -static int -smb_proc_writeX(struct inode *inode, loff_t offset, int count, const char *data) -{ - struct smb_sb_info *server = server_from_inode(inode); - int result; - u8 *p; - static u8 pad[4]; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - VERBOSE("ino=%ld, fileid=%d, count=%d@%Ld\n", - inode->i_ino, SMB_I(inode)->fileid, count, offset); - - p = smb_setup_header(req, SMBwriteX, 14, count + 1); - WSET(req->rq_header, smb_vwv0, 0x00ff); - WSET(req->rq_header, smb_vwv1, 0); - WSET(req->rq_header, smb_vwv2, SMB_I(inode)->fileid); - DSET(req->rq_header, smb_vwv3, (u32)offset); /* low 32 bits */ - DSET(req->rq_header, smb_vwv5, 0); - WSET(req->rq_header, smb_vwv7, 0); /* write mode */ - WSET(req->rq_header, smb_vwv8, 0); - WSET(req->rq_header, smb_vwv9, 0); - WSET(req->rq_header, smb_vwv10, count); /* data length */ - WSET(req->rq_header, smb_vwv11, smb_vwv12 + 2 + 1); - DSET(req->rq_header, smb_vwv12, (u32)(offset >> 32)); - - req->rq_iov[1].iov_base = pad; - req->rq_iov[1].iov_len = 1; - req->rq_iov[2].iov_base = (char *) data; - req->rq_iov[2].iov_len = count; - req->rq_iovlen = 3; - req->rq_flags |= SMB_REQ_NORETRY; - - result = smb_request_ok(req, SMBwriteX, 6, 0); - if (result >= 0) - result = WVAL(req->rq_header, smb_vwv2); - - smb_rput(req); -out: - return result; -} - -int -smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - char *p; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - p = smb_setup_header(req, SMBcreate, 3, 0); - WSET(req->rq_header, smb_vwv0, attr); - DSET(req->rq_header, smb_vwv1, utc2local(server, ctime)); - result = smb_simple_encode_path(req, &p, dentry, NULL); - if (result < 0) - goto out_free; - smb_setup_bcc(req, p); - - result = smb_request_ok(req, SMBcreate, 1, 0); - if (result < 0) - goto out_free; - - *fileid = WVAL(req->rq_header, smb_vwv0); - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -int -smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry) -{ - struct smb_sb_info *server = server_from_dentry(old_dentry); - char *p; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - p = smb_setup_header(req, SMBmv, 1, 0); - WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN | aDIR); - result = smb_simple_encode_path(req, &p, old_dentry, NULL); - if (result < 0) - goto out_free; - result = smb_simple_encode_path(req, &p, new_dentry, NULL); - if (result < 0) - goto out_free; - smb_setup_bcc(req, p); - - if ((result = smb_request_ok(req, SMBmv, 0, 0)) < 0) - goto out_free; - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -/* - * Code common to mkdir and rmdir. - */ -static int -smb_proc_generic_command(struct dentry *dentry, __u8 command) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - char *p; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - p = smb_setup_header(req, command, 0, 0); - result = smb_simple_encode_path(req, &p, dentry, NULL); - if (result < 0) - goto out_free; - smb_setup_bcc(req, p); - - result = smb_request_ok(req, command, 0, 0); - if (result < 0) - goto out_free; - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -int -smb_proc_mkdir(struct dentry *dentry) -{ - return smb_proc_generic_command(dentry, SMBmkdir); -} - -int -smb_proc_rmdir(struct dentry *dentry) -{ - return smb_proc_generic_command(dentry, SMBrmdir); -} - -#if SMBFS_POSIX_UNLINK -/* - * Removes readonly attribute from a file. Used by unlink to give posix - * semantics. - */ -static int -smb_set_rw(struct dentry *dentry,struct smb_sb_info *server) -{ - int result; - struct smb_fattr fattr; - - /* FIXME: cifsUE should allow removing a readonly file. */ - - /* first get current attribute */ - smb_init_dirent(server, &fattr); - result = server->ops->getattr(server, dentry, &fattr); - smb_finish_dirent(server, &fattr); - if (result < 0) - return result; - - /* if RONLY attribute is set, remove it */ - if (fattr.attr & aRONLY) { /* read only attribute is set */ - fattr.attr &= ~aRONLY; - result = smb_proc_setattr_core(server, dentry, fattr.attr); - } - return result; -} -#endif - -int -smb_proc_unlink(struct dentry *dentry) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - int flag = 0; - char *p; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - retry: - p = smb_setup_header(req, SMBunlink, 1, 0); - WSET(req->rq_header, smb_vwv0, aSYSTEM | aHIDDEN); - result = smb_simple_encode_path(req, &p, dentry, NULL); - if (result < 0) - goto out_free; - smb_setup_bcc(req, p); - - if ((result = smb_request_ok(req, SMBunlink, 0, 0)) < 0) { -#if SMBFS_POSIX_UNLINK - if (result == -EACCES && !flag) { - /* Posix semantics is for the read-only state - of a file to be ignored in unlink(). In the - SMB world a unlink() is refused on a - read-only file. To make things easier for - unix users we try to override the files - permission if the unlink fails with the - right error. - This introduces a race condition that could - lead to a file being written by someone who - shouldn't have access, but as far as I can - tell that is unavoidable */ - - /* remove RONLY attribute and try again */ - result = smb_set_rw(dentry,server); - if (result == 0) { - flag = 1; - req->rq_flags = 0; - goto retry; - } - } -#endif - goto out_free; - } - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -int -smb_proc_flush(struct smb_sb_info *server, __u16 fileid) -{ - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBflush, 1, 0); - WSET(req->rq_header, smb_vwv0, fileid); - req->rq_flags |= SMB_REQ_NORETRY; - result = smb_request_ok(req, SMBflush, 0, 0); - - smb_rput(req); -out: - return result; -} - -static int -smb_proc_trunc32(struct inode *inode, loff_t length) -{ - /* - * Writing 0bytes is old-SMB magic for truncating files. - * MAX_NON_LFS should prevent this from being called with a too - * large offset. - */ - return smb_proc_write(inode, length, 0, NULL); -} - -static int -smb_proc_trunc64(struct inode *inode, loff_t length) -{ - struct smb_sb_info *server = server_from_inode(inode); - int result; - char *param; - char *data; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 14))) - goto out; - - param = req->rq_buffer; - data = req->rq_buffer + 6; - - /* FIXME: must we also set allocation size? winNT seems to do that */ - WSET(param, 0, SMB_I(inode)->fileid); - WSET(param, 2, SMB_SET_FILE_END_OF_FILE_INFO); - WSET(param, 4, 0); - LSET(data, 0, length); - - req->rq_trans2_command = TRANSACT2_SETFILEINFO; - req->rq_ldata = 8; - req->rq_data = data; - req->rq_lparm = 6; - req->rq_parm = param; - req->rq_flags |= SMB_REQ_NORETRY; - result = smb_add_request(req); - if (result < 0) - goto out_free; - - result = 0; - if (req->rq_rcls != 0) - result = smb_errno(req); - -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_trunc95(struct inode *inode, loff_t length) -{ - struct smb_sb_info *server = server_from_inode(inode); - int result = smb_proc_trunc32(inode, length); - - /* - * win9x doesn't appear to update the size immediately. - * It will return the old file size after the truncate, - * confusing smbfs. So we force an update. - * - * FIXME: is this still necessary? - */ - smb_proc_flush(server, SMB_I(inode)->fileid); - return result; -} - -static void -smb_init_dirent(struct smb_sb_info *server, struct smb_fattr *fattr) -{ - memset(fattr, 0, sizeof(*fattr)); - - fattr->f_nlink = 1; - fattr->f_uid = server->mnt->uid; - fattr->f_gid = server->mnt->gid; - fattr->f_unix = 0; -} - -static void -smb_finish_dirent(struct smb_sb_info *server, struct smb_fattr *fattr) -{ - if (fattr->f_unix) - return; - - fattr->f_mode = server->mnt->file_mode; - if (fattr->attr & aDIR) { - fattr->f_mode = server->mnt->dir_mode; - fattr->f_size = SMB_ST_BLKSIZE; - } - /* Check the read-only flag */ - if (fattr->attr & aRONLY) - fattr->f_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH); - - /* How many 512 byte blocks do we need for this file? */ - fattr->f_blocks = 0; - if (fattr->f_size != 0) - fattr->f_blocks = 1 + ((fattr->f_size-1) >> 9); - return; -} - -void -smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr, - struct super_block *sb) -{ - smb_init_dirent(server, fattr); - fattr->attr = aDIR; - fattr->f_ino = 2; /* traditional root inode number */ - fattr->f_mtime = current_fs_time(sb); - smb_finish_dirent(server, fattr); -} - -/* - * Decode a dirent for old protocols - * - * qname is filled with the decoded, and possibly translated, name. - * fattr receives decoded attributes - * - * Bugs Noted: - * (1) Pathworks servers may pad the name with extra spaces. - */ -static char * -smb_decode_short_dirent(struct smb_sb_info *server, char *p, - struct qstr *qname, struct smb_fattr *fattr, - unsigned char *name_buf) -{ - int len; - - /* - * SMB doesn't have a concept of inode numbers ... - */ - smb_init_dirent(server, fattr); - fattr->f_ino = 0; /* FIXME: do we need this? */ - - p += SMB_STATUS_SIZE; /* reserved (search_status) */ - fattr->attr = *p; - fattr->f_mtime.tv_sec = date_dos2unix(server, WVAL(p, 3), WVAL(p, 1)); - fattr->f_mtime.tv_nsec = 0; - fattr->f_size = DVAL(p, 5); - fattr->f_ctime = fattr->f_mtime; - fattr->f_atime = fattr->f_mtime; - qname->name = p + 9; - len = strnlen(qname->name, 12); - - /* - * Trim trailing blanks for Pathworks servers - */ - while (len > 2 && qname->name[len-1] == ' ') - len--; - - smb_finish_dirent(server, fattr); - -#if 0 - /* FIXME: These only work for ascii chars, and recent smbmount doesn't - allow the flag to be set anyway. It kills const. Remove? */ - switch (server->opt.case_handling) { - case SMB_CASE_UPPER: - str_upper(entry->name, len); - break; - case SMB_CASE_LOWER: - str_lower(entry->name, len); - break; - default: - break; - } -#endif - - qname->len = 0; - len = server->ops->convert(name_buf, SMB_MAXNAMELEN, - qname->name, len, - server->remote_nls, server->local_nls); - if (len > 0) { - qname->len = len; - qname->name = name_buf; - DEBUG1("len=%d, name=%.*s\n",qname->len,qname->len,qname->name); - } - - return p + 22; -} - -/* - * This routine is used to read in directory entries from the network. - * Note that it is for short directory name seeks, i.e.: protocol < - * SMB_PROTOCOL_LANMAN2 - */ -static int -smb_proc_readdir_short(struct file *filp, void *dirent, filldir_t filldir, - struct smb_cache_control *ctl) -{ - struct dentry *dir = filp->f_path.dentry; - struct smb_sb_info *server = server_from_dentry(dir); - struct qstr qname; - struct smb_fattr fattr; - char *p; - int result; - int i, first, entries_seen, entries; - int entries_asked = (server->opt.max_xmit - 100) / SMB_DIRINFO_SIZE; - __u16 bcc; - __u16 count; - char status[SMB_STATUS_SIZE]; - static struct qstr mask = { - .name = "*.*", - .len = 3, - }; - unsigned char *last_status; - struct smb_request *req; - unsigned char *name_buf; - - VERBOSE("%s/%s\n", DENTRY_PATH(dir)); - - lock_kernel(); - - result = -ENOMEM; - if (! (name_buf = kmalloc(SMB_MAXNAMELEN, GFP_KERNEL))) - goto out; - - first = 1; - entries = 0; - entries_seen = 2; /* implicit . and .. */ - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, server->opt.max_xmit))) - goto out_name; - - while (1) { - p = smb_setup_header(req, SMBsearch, 2, 0); - WSET(req->rq_header, smb_vwv0, entries_asked); - WSET(req->rq_header, smb_vwv1, aDIR); - if (first == 1) { - result = smb_simple_encode_path(req, &p, dir, &mask); - if (result < 0) - goto out_free; - if (p + 3 > (char *)req->rq_buffer + req->rq_bufsize) { - result = -ENAMETOOLONG; - goto out_free; - } - *p++ = 5; - WSET(p, 0, 0); - p += 2; - first = 0; - } else { - if (p + 5 + SMB_STATUS_SIZE > - (char *)req->rq_buffer + req->rq_bufsize) { - result = -ENAMETOOLONG; - goto out_free; - } - - *p++ = 4; - *p++ = 0; - *p++ = 5; - WSET(p, 0, SMB_STATUS_SIZE); - p += 2; - memcpy(p, status, SMB_STATUS_SIZE); - p += SMB_STATUS_SIZE; - } - - smb_setup_bcc(req, p); - - result = smb_request_ok(req, SMBsearch, 1, -1); - if (result < 0) { - if ((req->rq_rcls == ERRDOS) && - (req->rq_err == ERRnofiles)) - break; - goto out_free; - } - count = WVAL(req->rq_header, smb_vwv0); - if (count <= 0) - break; - - result = -EIO; - bcc = smb_bcc(req->rq_header); - if (bcc != count * SMB_DIRINFO_SIZE + 3) - goto out_free; - p = req->rq_buffer + 3; - - - /* Make sure the response fits in the buffer. Fixed sized - entries means we don't have to check in the decode loop. */ - - last_status = req->rq_buffer + 3 + (count-1) * SMB_DIRINFO_SIZE; - - if (last_status + SMB_DIRINFO_SIZE >= - req->rq_buffer + req->rq_bufsize) { - printk(KERN_ERR "smb_proc_readdir_short: " - "last dir entry outside buffer! " - "%d@%p %d@%p\n", SMB_DIRINFO_SIZE, last_status, - req->rq_bufsize, req->rq_buffer); - goto out_free; - } - - /* Read the last entry into the status field. */ - memcpy(status, last_status, SMB_STATUS_SIZE); - - - /* Now we are ready to parse smb directory entries. */ - - for (i = 0; i < count; i++) { - p = smb_decode_short_dirent(server, p, - &qname, &fattr, name_buf); - if (qname.len == 0) - continue; - - if (entries_seen == 2 && qname.name[0] == '.') { - if (qname.len == 1) - continue; - if (qname.name[1] == '.' && qname.len == 2) - continue; - } - if (!smb_fill_cache(filp, dirent, filldir, ctl, - &qname, &fattr)) - ; /* stop reading? */ - entries_seen++; - } - } - result = entries; - -out_free: - smb_rput(req); -out_name: - kfree(name_buf); -out: - unlock_kernel(); - return result; -} - -static void smb_decode_unix_basic(struct smb_fattr *fattr, struct smb_sb_info *server, char *p) -{ - u64 size, disk_bytes; - - /* FIXME: verify nls support. all is sent as utf8? */ - - fattr->f_unix = 1; - fattr->f_mode = 0; - - /* FIXME: use the uniqueID from the remote instead? */ - /* 0 L file size in bytes */ - /* 8 L file size on disk in bytes (block count) */ - /* 40 L uid */ - /* 48 L gid */ - /* 56 W file type */ - /* 60 L devmajor */ - /* 68 L devminor */ - /* 76 L unique ID (inode) */ - /* 84 L permissions */ - /* 92 L link count */ - - size = LVAL(p, 0); - disk_bytes = LVAL(p, 8); - - /* - * Some samba versions round up on-disk byte usage - * to 1MB boundaries, making it useless. When seeing - * that, use the size instead. - */ - if (!(disk_bytes & 0xfffff)) - disk_bytes = size+511; - - fattr->f_size = size; - fattr->f_blocks = disk_bytes >> 9; - fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 16)); - fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 24)); - fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 32)); - - if (server->mnt->flags & SMB_MOUNT_UID) - fattr->f_uid = server->mnt->uid; - else - fattr->f_uid = LVAL(p, 40); - - if (server->mnt->flags & SMB_MOUNT_GID) - fattr->f_gid = server->mnt->gid; - else - fattr->f_gid = LVAL(p, 48); - - fattr->f_mode |= smb_filetype_to_mode(WVAL(p, 56)); - - if (S_ISBLK(fattr->f_mode) || S_ISCHR(fattr->f_mode)) { - __u64 major = LVAL(p, 60); - __u64 minor = LVAL(p, 68); - - fattr->f_rdev = MKDEV(major & 0xffffffff, minor & 0xffffffff); - if (MAJOR(fattr->f_rdev) != (major & 0xffffffff) || - MINOR(fattr->f_rdev) != (minor & 0xffffffff)) - fattr->f_rdev = 0; - } - - fattr->f_mode |= LVAL(p, 84); - - if ( (server->mnt->flags & SMB_MOUNT_DMODE) && - (S_ISDIR(fattr->f_mode)) ) - fattr->f_mode = (server->mnt->dir_mode & S_IRWXUGO) | S_IFDIR; - else if ( (server->mnt->flags & SMB_MOUNT_FMODE) && - !(S_ISDIR(fattr->f_mode)) ) - fattr->f_mode = (server->mnt->file_mode & S_IRWXUGO) | - (fattr->f_mode & S_IFMT); - -} - -/* - * Interpret a long filename structure using the specified info level: - * level 1 for anything below NT1 protocol - * level 260 for NT1 protocol - * - * qname is filled with the decoded, and possibly translated, name - * fattr receives decoded attributes. - * - * Bugs Noted: - * (1) Win NT 4.0 appends a null byte to names and counts it in the length! - */ -static char * -smb_decode_long_dirent(struct smb_sb_info *server, char *p, int level, - struct qstr *qname, struct smb_fattr *fattr, - unsigned char *name_buf) -{ - char *result; - unsigned int len = 0; - int n; - __u16 date, time; - int unicode = (server->mnt->flags & SMB_MOUNT_UNICODE); - - /* - * SMB doesn't have a concept of inode numbers ... - */ - smb_init_dirent(server, fattr); - fattr->f_ino = 0; /* FIXME: do we need this? */ - - switch (level) { - case 1: - len = *((unsigned char *) p + 22); - qname->name = p + 23; - result = p + 24 + len; - - date = WVAL(p, 0); - time = WVAL(p, 2); - fattr->f_ctime.tv_sec = date_dos2unix(server, date, time); - fattr->f_ctime.tv_nsec = 0; - - date = WVAL(p, 4); - time = WVAL(p, 6); - fattr->f_atime.tv_sec = date_dos2unix(server, date, time); - fattr->f_atime.tv_nsec = 0; - - date = WVAL(p, 8); - time = WVAL(p, 10); - fattr->f_mtime.tv_sec = date_dos2unix(server, date, time); - fattr->f_mtime.tv_nsec = 0; - fattr->f_size = DVAL(p, 12); - /* ULONG allocation size */ - fattr->attr = WVAL(p, 20); - - VERBOSE("info 1 at %p, len=%d, name=%.*s\n", - p, len, len, qname->name); - break; - case 260: - result = p + WVAL(p, 0); - len = DVAL(p, 60); - if (len > 255) len = 255; - /* NT4 null terminates, unless we are using unicode ... */ - qname->name = p + 94; - if (!unicode && len && qname->name[len-1] == '\0') - len--; - - fattr->f_ctime = smb_ntutc2unixutc(LVAL(p, 8)); - fattr->f_atime = smb_ntutc2unixutc(LVAL(p, 16)); - fattr->f_mtime = smb_ntutc2unixutc(LVAL(p, 24)); - /* change time (32) */ - fattr->f_size = LVAL(p, 40); - /* alloc size (48) */ - fattr->attr = DVAL(p, 56); - - VERBOSE("info 260 at %p, len=%d, name=%.*s\n", - p, len, len, qname->name); - break; - case SMB_FIND_FILE_UNIX: - result = p + WVAL(p, 0); - qname->name = p + 108; - - len = strlen(qname->name); - /* FIXME: should we check the length?? */ - - p += 8; - smb_decode_unix_basic(fattr, server, p); - VERBOSE("info SMB_FIND_FILE_UNIX at %p, len=%d, name=%.*s\n", - p, len, len, qname->name); - break; - default: - PARANOIA("Unknown info level %d\n", level); - result = p + WVAL(p, 0); - goto out; - } - - smb_finish_dirent(server, fattr); - -#if 0 - /* FIXME: These only work for ascii chars, and recent smbmount doesn't - allow the flag to be set anyway. Remove? */ - switch (server->opt.case_handling) { - case SMB_CASE_UPPER: - str_upper(qname->name, len); - break; - case SMB_CASE_LOWER: - str_lower(qname->name, len); - break; - default: - break; - } -#endif - - qname->len = 0; - n = server->ops->convert(name_buf, SMB_MAXNAMELEN, - qname->name, len, - server->remote_nls, server->local_nls); - if (n > 0) { - qname->len = n; - qname->name = name_buf; - } - -out: - return result; -} - -/* findfirst/findnext flags */ -#define SMB_CLOSE_AFTER_FIRST (1<<0) -#define SMB_CLOSE_IF_END (1<<1) -#define SMB_REQUIRE_RESUME_KEY (1<<2) -#define SMB_CONTINUE_BIT (1<<3) - -/* - * Note: samba-2.0.7 (at least) has a very similar routine, cli_list, in - * source/libsmb/clilist.c. When looking for smb bugs in the readdir code, - * go there for advise. - * - * Bugs Noted: - * (1) When using Info Level 1 Win NT 4.0 truncates directory listings - * for certain patterns of names and/or lengths. The breakage pattern - * is completely reproducible and can be toggled by the creation of a - * single file. (E.g. echo hi >foo breaks, rm -f foo works.) - */ -static int -smb_proc_readdir_long(struct file *filp, void *dirent, filldir_t filldir, - struct smb_cache_control *ctl) -{ - struct dentry *dir = filp->f_path.dentry; - struct smb_sb_info *server = server_from_dentry(dir); - struct qstr qname; - struct smb_fattr fattr; - - unsigned char *p, *lastname; - char *mask, *param; - __u16 command; - int first, entries_seen; - - /* Both NT and OS/2 accept info level 1 (but see note below). */ - int info_level = 260; - const int max_matches = 512; - - unsigned int ff_searchcount = 0; - unsigned int ff_eos = 0; - unsigned int ff_lastname = 0; - unsigned int ff_dir_handle = 0; - unsigned int loop_count = 0; - unsigned int mask_len, i; - int result; - struct smb_request *req; - unsigned char *name_buf; - static struct qstr star = { - .name = "*", - .len = 1, - }; - - lock_kernel(); - - /* - * We always prefer unix style. Use info level 1 for older - * servers that don't do 260. - */ - if (server->opt.capabilities & SMB_CAP_UNIX) - info_level = SMB_FIND_FILE_UNIX; - else if (server->opt.protocol < SMB_PROTOCOL_NT1) - info_level = 1; - - result = -ENOMEM; - if (! (name_buf = kmalloc(SMB_MAXNAMELEN+2, GFP_KERNEL))) - goto out; - if (! (req = smb_alloc_request(server, server->opt.max_xmit))) - goto out_name; - param = req->rq_buffer; - - /* - * Encode the initial path - */ - mask = param + 12; - - result = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dir, &star); - if (result <= 0) - goto out_free; - mask_len = result - 1; /* mask_len is strlen, not #bytes */ - result = 0; - first = 1; - VERBOSE("starting mask_len=%d, mask=%s\n", mask_len, mask); - - entries_seen = 2; - ff_eos = 0; - - while (ff_eos == 0) { - loop_count += 1; - if (loop_count > 10) { - printk(KERN_WARNING "smb_proc_readdir_long: " - "Looping in FIND_NEXT??\n"); - result = -EIO; - break; - } - - if (first != 0) { - command = TRANSACT2_FINDFIRST; - WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); - WSET(param, 2, max_matches); /* max count */ - WSET(param, 4, SMB_CLOSE_IF_END); - WSET(param, 6, info_level); - DSET(param, 8, 0); - } else { - command = TRANSACT2_FINDNEXT; - - VERBOSE("handle=0x%X, lastname=%d, mask=%.*s\n", - ff_dir_handle, ff_lastname, mask_len, mask); - - WSET(param, 0, ff_dir_handle); /* search handle */ - WSET(param, 2, max_matches); /* max count */ - WSET(param, 4, info_level); - DSET(param, 6, 0); - WSET(param, 10, SMB_CONTINUE_BIT|SMB_CLOSE_IF_END); - } - - req->rq_trans2_command = command; - req->rq_ldata = 0; - req->rq_data = NULL; - req->rq_lparm = 12 + mask_len + 1; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) { - PARANOIA("error=%d, breaking\n", result); - break; - } - - if (req->rq_rcls == ERRSRV && req->rq_err == ERRerror) { - /* a damn Win95 bug - sometimes it clags if you - ask it too fast */ - schedule_timeout_interruptible(msecs_to_jiffies(200)); - continue; - } - - if (req->rq_rcls != 0) { - result = smb_errno(req); - PARANOIA("name=%s, result=%d, rcls=%d, err=%d\n", - mask, result, req->rq_rcls, req->rq_err); - break; - } - - /* parse out some important return info */ - if (first != 0) { - ff_dir_handle = WVAL(req->rq_parm, 0); - ff_searchcount = WVAL(req->rq_parm, 2); - ff_eos = WVAL(req->rq_parm, 4); - ff_lastname = WVAL(req->rq_parm, 8); - } else { - ff_searchcount = WVAL(req->rq_parm, 0); - ff_eos = WVAL(req->rq_parm, 2); - ff_lastname = WVAL(req->rq_parm, 6); - } - - if (ff_searchcount == 0) - break; - - /* Now we are ready to parse smb directory entries. */ - - /* point to the data bytes */ - p = req->rq_data; - for (i = 0; i < ff_searchcount; i++) { - /* make sure we stay within the buffer */ - if (p >= req->rq_data + req->rq_ldata) { - printk(KERN_ERR "smb_proc_readdir_long: " - "dirent pointer outside buffer! " - "%p %d@%p\n", - p, req->rq_ldata, req->rq_data); - result = -EIO; /* always a comm. error? */ - goto out_free; - } - - p = smb_decode_long_dirent(server, p, info_level, - &qname, &fattr, name_buf); - - /* ignore . and .. from the server */ - if (entries_seen == 2 && qname.name[0] == '.') { - if (qname.len == 1) - continue; - if (qname.name[1] == '.' && qname.len == 2) - continue; - } - - if (!smb_fill_cache(filp, dirent, filldir, ctl, - &qname, &fattr)) - ; /* stop reading? */ - entries_seen++; - } - - VERBOSE("received %d entries, eos=%d\n", ff_searchcount,ff_eos); - - /* - * We might need the lastname for continuations. - * - * Note that some servers (win95?) point to the filename and - * others (NT4, Samba using NT1) to the dir entry. We assume - * here that those who do not point to a filename do not need - * this info to continue the listing. - * - * OS/2 needs this and talks infolevel 1. - * NetApps want lastname with infolevel 260. - * win2k want lastname with infolevel 260, and points to - * the record not to the name. - * Samba+CifsUnixExt doesn't need lastname. - * - * Both are happy if we return the data they point to. So we do. - * (FIXME: above is not true with win2k) - */ - mask_len = 0; - if (info_level != SMB_FIND_FILE_UNIX && - ff_lastname > 0 && ff_lastname < req->rq_ldata) { - lastname = req->rq_data + ff_lastname; - - switch (info_level) { - case 260: - mask_len = req->rq_ldata - ff_lastname; - break; - case 1: - /* lastname points to a length byte */ - mask_len = *lastname++; - if (ff_lastname + 1 + mask_len > req->rq_ldata) - mask_len = req->rq_ldata - ff_lastname - 1; - break; - } - - /* - * Update the mask string for the next message. - */ - if (mask_len > 255) - mask_len = 255; - if (mask_len) - strncpy(mask, lastname, mask_len); - } - mask_len = strnlen(mask, mask_len); - VERBOSE("new mask, len=%d@%d of %d, mask=%.*s\n", - mask_len, ff_lastname, req->rq_ldata, mask_len, mask); - - first = 0; - loop_count = 0; - } - -out_free: - smb_rput(req); -out_name: - kfree(name_buf); -out: - unlock_kernel(); - return result; -} - -/* - * This version uses the trans2 TRANSACT2_FINDFIRST message - * to get the attribute data. - * - * Bugs Noted: - */ -static int -smb_proc_getattr_ff(struct smb_sb_info *server, struct dentry *dentry, - struct smb_fattr *fattr) -{ - char *param, *mask; - __u16 date, time; - int mask_len, result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - param = req->rq_buffer; - mask = param + 12; - - mask_len = smb_encode_path(server, mask, SMB_MAXPATHLEN+1, dentry,NULL); - if (mask_len < 0) { - result = mask_len; - goto out_free; - } - VERBOSE("name=%s, len=%d\n", mask, mask_len); - WSET(param, 0, aSYSTEM | aHIDDEN | aDIR); - WSET(param, 2, 1); /* max count */ - WSET(param, 4, 1); /* close after this call */ - WSET(param, 6, 1); /* info_level */ - DSET(param, 8, 0); - - req->rq_trans2_command = TRANSACT2_FINDFIRST; - req->rq_ldata = 0; - req->rq_data = NULL; - req->rq_lparm = 12 + mask_len; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out_free; - if (req->rq_rcls != 0) { - result = smb_errno(req); -#ifdef SMBFS_PARANOIA - if (result != -ENOENT) - PARANOIA("error for %s, rcls=%d, err=%d\n", - mask, req->rq_rcls, req->rq_err); -#endif - goto out_free; - } - /* Make sure we got enough data ... */ - result = -EINVAL; - if (req->rq_ldata < 22 || WVAL(req->rq_parm, 2) != 1) { - PARANOIA("bad result for %s, len=%d, count=%d\n", - mask, req->rq_ldata, WVAL(req->rq_parm, 2)); - goto out_free; - } - - /* - * Decode the response into the fattr ... - */ - date = WVAL(req->rq_data, 0); - time = WVAL(req->rq_data, 2); - fattr->f_ctime.tv_sec = date_dos2unix(server, date, time); - fattr->f_ctime.tv_nsec = 0; - - date = WVAL(req->rq_data, 4); - time = WVAL(req->rq_data, 6); - fattr->f_atime.tv_sec = date_dos2unix(server, date, time); - fattr->f_atime.tv_nsec = 0; - - date = WVAL(req->rq_data, 8); - time = WVAL(req->rq_data, 10); - fattr->f_mtime.tv_sec = date_dos2unix(server, date, time); - fattr->f_mtime.tv_nsec = 0; - VERBOSE("name=%s, date=%x, time=%x, mtime=%ld\n", - mask, date, time, fattr->f_mtime.tv_sec); - fattr->f_size = DVAL(req->rq_data, 12); - /* ULONG allocation size */ - fattr->attr = WVAL(req->rq_data, 20); - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_getattr_core(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *fattr) -{ - int result; - char *p; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - p = smb_setup_header(req, SMBgetatr, 0, 0); - result = smb_simple_encode_path(req, &p, dir, NULL); - if (result < 0) - goto out_free; - smb_setup_bcc(req, p); - - if ((result = smb_request_ok(req, SMBgetatr, 10, 0)) < 0) - goto out_free; - fattr->attr = WVAL(req->rq_header, smb_vwv0); - fattr->f_mtime.tv_sec = local2utc(server, DVAL(req->rq_header, smb_vwv1)); - fattr->f_mtime.tv_nsec = 0; - fattr->f_size = DVAL(req->rq_header, smb_vwv3); - fattr->f_ctime = fattr->f_mtime; - fattr->f_atime = fattr->f_mtime; -#ifdef SMBFS_DEBUG_TIMESTAMP - printk("getattr_core: %s/%s, mtime=%ld\n", - DENTRY_PATH(dir), fattr->f_mtime); -#endif - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -/* - * Bugs Noted: - * (1) Win 95 swaps the date and time fields in the standard info level. - */ -static int -smb_proc_getattr_trans2(struct smb_sb_info *server, struct dentry *dir, - struct smb_request *req, int infolevel) -{ - char *p, *param; - int result; - - param = req->rq_buffer; - WSET(param, 0, infolevel); - DSET(param, 2, 0); - result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL); - if (result < 0) - goto out; - p = param + 6 + result; - - req->rq_trans2_command = TRANSACT2_QPATHINFO; - req->rq_ldata = 0; - req->rq_data = NULL; - req->rq_lparm = p - param; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out; - if (req->rq_rcls != 0) { - VERBOSE("for %s: result=%d, rcls=%d, err=%d\n", - ¶m[6], result, req->rq_rcls, req->rq_err); - result = smb_errno(req); - goto out; - } - result = -ENOENT; - if (req->rq_ldata < 22) { - PARANOIA("not enough data for %s, len=%d\n", - ¶m[6], req->rq_ldata); - goto out; - } - - result = 0; -out: - return result; -} - -static int -smb_proc_getattr_trans2_std(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *attr) -{ - u16 date, time; - int off_date = 0, off_time = 2; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - result = smb_proc_getattr_trans2(server, dir, req, SMB_INFO_STANDARD); - if (result < 0) - goto out_free; - - /* - * Kludge alert: Win 95 swaps the date and time field, - * contrary to the CIFS docs and Win NT practice. - */ - if (server->mnt->flags & SMB_MOUNT_WIN95) { - off_date = 2; - off_time = 0; - } - date = WVAL(req->rq_data, off_date); - time = WVAL(req->rq_data, off_time); - attr->f_ctime.tv_sec = date_dos2unix(server, date, time); - attr->f_ctime.tv_nsec = 0; - - date = WVAL(req->rq_data, 4 + off_date); - time = WVAL(req->rq_data, 4 + off_time); - attr->f_atime.tv_sec = date_dos2unix(server, date, time); - attr->f_atime.tv_nsec = 0; - - date = WVAL(req->rq_data, 8 + off_date); - time = WVAL(req->rq_data, 8 + off_time); - attr->f_mtime.tv_sec = date_dos2unix(server, date, time); - attr->f_mtime.tv_nsec = 0; -#ifdef SMBFS_DEBUG_TIMESTAMP - printk(KERN_DEBUG "getattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n", - DENTRY_PATH(dir), date, time, attr->f_mtime); -#endif - attr->f_size = DVAL(req->rq_data, 12); - attr->attr = WVAL(req->rq_data, 20); - -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_getattr_trans2_all(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *attr) -{ - struct smb_request *req; - int result; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - result = smb_proc_getattr_trans2(server, dir, req, - SMB_QUERY_FILE_ALL_INFO); - if (result < 0) - goto out_free; - - attr->f_ctime = smb_ntutc2unixutc(LVAL(req->rq_data, 0)); - attr->f_atime = smb_ntutc2unixutc(LVAL(req->rq_data, 8)); - attr->f_mtime = smb_ntutc2unixutc(LVAL(req->rq_data, 16)); - /* change (24) */ - attr->attr = WVAL(req->rq_data, 32); - /* pad? (34) */ - /* allocated size (40) */ - attr->f_size = LVAL(req->rq_data, 48); - -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_getattr_unix(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *attr) -{ - struct smb_request *req; - int result; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - result = smb_proc_getattr_trans2(server, dir, req, - SMB_QUERY_FILE_UNIX_BASIC); - if (result < 0) - goto out_free; - - smb_decode_unix_basic(attr, server, req->rq_data); - -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_getattr_95(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *attr) -{ - struct inode *inode = dir->d_inode; - int result; - - /* FIXME: why not use the "all" version? */ - result = smb_proc_getattr_trans2_std(server, dir, attr); - if (result < 0) - goto out; - - /* - * None of the getattr versions here can make win9x return the right - * filesize if there are changes made to an open file. - * A seek-to-end does return the right size, but we only need to do - * that on files we have written. - */ - if (inode && SMB_I(inode)->flags & SMB_F_LOCALWRITE && - smb_is_open(inode)) - { - __u16 fileid = SMB_I(inode)->fileid; - attr->f_size = smb_proc_seek(server, fileid, 2, 0); - } - -out: - return result; -} - -static int -smb_proc_ops_wait(struct smb_sb_info *server) -{ - int result; - - result = wait_event_interruptible_timeout(server->conn_wq, - server->conn_complete, 30*HZ); - - if (!result || signal_pending(current)) - return -EIO; - - return 0; -} - -static int -smb_proc_getattr_null(struct smb_sb_info *server, struct dentry *dir, - struct smb_fattr *fattr) -{ - int result; - - if (smb_proc_ops_wait(server) < 0) - return -EIO; - - smb_init_dirent(server, fattr); - result = server->ops->getattr(server, dir, fattr); - smb_finish_dirent(server, fattr); - - return result; -} - -static int -smb_proc_readdir_null(struct file *filp, void *dirent, filldir_t filldir, - struct smb_cache_control *ctl) -{ - struct smb_sb_info *server = server_from_dentry(filp->f_path.dentry); - - if (smb_proc_ops_wait(server) < 0) - return -EIO; - - return server->ops->readdir(filp, dirent, filldir, ctl); -} - -int -smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr) -{ - struct smb_sb_info *server = server_from_dentry(dir); - int result; - - smb_init_dirent(server, fattr); - result = server->ops->getattr(server, dir, fattr); - smb_finish_dirent(server, fattr); - - return result; -} - - -/* - * Because of bugs in the core protocol, we use this only to set - * attributes. See smb_proc_settime() below for timestamp handling. - * - * Bugs Noted: - * (1) If mtime is non-zero, both Win 3.1 and Win 95 fail - * with an undocumented error (ERRDOS code 50). Setting - * mtime to 0 allows the attributes to be set. - * (2) The extra parameters following the name string aren't - * in the CIFS docs, but seem to be necessary for operation. - */ -static int -smb_proc_setattr_core(struct smb_sb_info *server, struct dentry *dentry, - __u16 attr) -{ - char *p; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - - p = smb_setup_header(req, SMBsetatr, 8, 0); - WSET(req->rq_header, smb_vwv0, attr); - DSET(req->rq_header, smb_vwv1, 0); /* mtime */ - WSET(req->rq_header, smb_vwv3, 0); /* reserved values */ - WSET(req->rq_header, smb_vwv4, 0); - WSET(req->rq_header, smb_vwv5, 0); - WSET(req->rq_header, smb_vwv6, 0); - WSET(req->rq_header, smb_vwv7, 0); - result = smb_simple_encode_path(req, &p, dentry, NULL); - if (result < 0) - goto out_free; - if (p + 2 > (char *)req->rq_buffer + req->rq_bufsize) { - result = -ENAMETOOLONG; - goto out_free; - } - *p++ = 4; - *p++ = 0; - smb_setup_bcc(req, p); - - result = smb_request_ok(req, SMBsetatr, 0, 0); - if (result < 0) - goto out_free; - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -/* - * Because of bugs in the trans2 setattr messages, we must set - * attributes and timestamps separately. The core SMBsetatr - * message seems to be the only reliable way to set attributes. - */ -int -smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr) -{ - struct smb_sb_info *server = server_from_dentry(dir); - int result; - - VERBOSE("setting %s/%s, open=%d\n", - DENTRY_PATH(dir), smb_is_open(dir->d_inode)); - result = smb_proc_setattr_core(server, dir, fattr->attr); - return result; -} - -/* - * Sets the timestamps for an file open with write permissions. - */ -static int -smb_proc_setattr_ext(struct smb_sb_info *server, - struct inode *inode, struct smb_fattr *fattr) -{ - __u16 date, time; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBsetattrE, 7, 0); - WSET(req->rq_header, smb_vwv0, SMB_I(inode)->fileid); - /* We don't change the creation time */ - WSET(req->rq_header, smb_vwv1, 0); - WSET(req->rq_header, smb_vwv2, 0); - date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time); - WSET(req->rq_header, smb_vwv3, date); - WSET(req->rq_header, smb_vwv4, time); - date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time); - WSET(req->rq_header, smb_vwv5, date); - WSET(req->rq_header, smb_vwv6, time); -#ifdef SMBFS_DEBUG_TIMESTAMP - printk(KERN_DEBUG "smb_proc_setattr_ext: date=%d, time=%d, mtime=%ld\n", - date, time, fattr->f_mtime); -#endif - - req->rq_flags |= SMB_REQ_NORETRY; - result = smb_request_ok(req, SMBsetattrE, 0, 0); - if (result < 0) - goto out_free; - result = 0; -out_free: - smb_rput(req); -out: - return result; -} - -/* - * Bugs Noted: - * (1) The TRANSACT2_SETPATHINFO message under Win NT 4.0 doesn't - * set the file's attribute flags. - */ -static int -smb_proc_setattr_trans2(struct smb_sb_info *server, - struct dentry *dir, struct smb_fattr *fattr) -{ - __u16 date, time; - char *p, *param; - int result; - char data[26]; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - param = req->rq_buffer; - - WSET(param, 0, 1); /* Info level SMB_INFO_STANDARD */ - DSET(param, 2, 0); - result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, dir, NULL); - if (result < 0) - goto out_free; - p = param + 6 + result; - - WSET(data, 0, 0); /* creation time */ - WSET(data, 2, 0); - date_unix2dos(server, fattr->f_atime.tv_sec, &date, &time); - WSET(data, 4, date); - WSET(data, 6, time); - date_unix2dos(server, fattr->f_mtime.tv_sec, &date, &time); - WSET(data, 8, date); - WSET(data, 10, time); -#ifdef SMBFS_DEBUG_TIMESTAMP - printk(KERN_DEBUG "setattr_trans2: %s/%s, date=%x, time=%x, mtime=%ld\n", - DENTRY_PATH(dir), date, time, fattr->f_mtime); -#endif - DSET(data, 12, 0); /* size */ - DSET(data, 16, 0); /* blksize */ - WSET(data, 20, 0); /* attr */ - DSET(data, 22, 0); /* ULONG EA size */ - - req->rq_trans2_command = TRANSACT2_SETPATHINFO; - req->rq_ldata = 26; - req->rq_data = data; - req->rq_lparm = p - param; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out_free; - result = 0; - if (req->rq_rcls != 0) - result = smb_errno(req); - -out_free: - smb_rput(req); -out: - return result; -} - -/* - * ATTR_MODE 0x001 - * ATTR_UID 0x002 - * ATTR_GID 0x004 - * ATTR_SIZE 0x008 - * ATTR_ATIME 0x010 - * ATTR_MTIME 0x020 - * ATTR_CTIME 0x040 - * ATTR_ATIME_SET 0x080 - * ATTR_MTIME_SET 0x100 - * ATTR_FORCE 0x200 - * ATTR_ATTR_FLAG 0x400 - * - * major/minor should only be set by mknod. - */ -int -smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, - unsigned int major, unsigned int minor) -{ - struct smb_sb_info *server = server_from_dentry(d); - u64 nttime; - char *p, *param; - int result; - char data[100]; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - param = req->rq_buffer; - - DEBUG1("valid flags = 0x%04x\n", attr->ia_valid); - - WSET(param, 0, SMB_SET_FILE_UNIX_BASIC); - DSET(param, 2, 0); - result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL); - if (result < 0) - goto out_free; - p = param + 6 + result; - - /* 0 L file size in bytes */ - /* 8 L file size on disk in bytes (block count) */ - /* 40 L uid */ - /* 48 L gid */ - /* 56 W file type enum */ - /* 60 L devmajor */ - /* 68 L devminor */ - /* 76 L unique ID (inode) */ - /* 84 L permissions */ - /* 92 L link count */ - LSET(data, 0, SMB_SIZE_NO_CHANGE); - LSET(data, 8, SMB_SIZE_NO_CHANGE); - LSET(data, 16, SMB_TIME_NO_CHANGE); - LSET(data, 24, SMB_TIME_NO_CHANGE); - LSET(data, 32, SMB_TIME_NO_CHANGE); - LSET(data, 40, SMB_UID_NO_CHANGE); - LSET(data, 48, SMB_GID_NO_CHANGE); - DSET(data, 56, smb_filetype_from_mode(attr->ia_mode)); - LSET(data, 60, major); - LSET(data, 68, minor); - LSET(data, 76, 0); - LSET(data, 84, SMB_MODE_NO_CHANGE); - LSET(data, 92, 0); - - if (attr->ia_valid & ATTR_SIZE) { - LSET(data, 0, attr->ia_size); - LSET(data, 8, 0); /* can't set anyway */ - } - - /* - * FIXME: check the conversion function it the correct one - * - * we can't set ctime but we might as well pass this to the server - * and let it ignore it. - */ - if (attr->ia_valid & ATTR_CTIME) { - nttime = smb_unixutc2ntutc(attr->ia_ctime); - LSET(data, 16, nttime); - } - if (attr->ia_valid & ATTR_ATIME) { - nttime = smb_unixutc2ntutc(attr->ia_atime); - LSET(data, 24, nttime); - } - if (attr->ia_valid & ATTR_MTIME) { - nttime = smb_unixutc2ntutc(attr->ia_mtime); - LSET(data, 32, nttime); - } - - if (attr->ia_valid & ATTR_UID) { - LSET(data, 40, attr->ia_uid); - } - if (attr->ia_valid & ATTR_GID) { - LSET(data, 48, attr->ia_gid); - } - - if (attr->ia_valid & ATTR_MODE) { - LSET(data, 84, attr->ia_mode); - } - - req->rq_trans2_command = TRANSACT2_SETPATHINFO; - req->rq_ldata = 100; - req->rq_data = data; - req->rq_lparm = p - param; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - -out_free: - smb_rput(req); -out: - return result; -} - - -/* - * Set the modify and access timestamps for a file. - * - * Incredibly enough, in all of SMB there is no message to allow - * setting both attributes and timestamps at once. - * - * Bugs Noted: - * (1) Win 95 doesn't support the TRANSACT2_SETFILEINFO message - * with info level 1 (INFO_STANDARD). - * (2) Win 95 seems not to support setting directory timestamps. - * (3) Under the core protocol apparently the only way to set the - * timestamp is to open and close the file. - */ -int -smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr) -{ - struct smb_sb_info *server = server_from_dentry(dentry); - struct inode *inode = dentry->d_inode; - int result; - - VERBOSE("setting %s/%s, open=%d\n", - DENTRY_PATH(dentry), smb_is_open(inode)); - - /* setting the time on a Win95 server fails (tridge) */ - if (server->opt.protocol >= SMB_PROTOCOL_LANMAN2 && - !(server->mnt->flags & SMB_MOUNT_WIN95)) { - if (smb_is_open(inode) && SMB_I(inode)->access != SMB_O_RDONLY) - result = smb_proc_setattr_ext(server, inode, fattr); - else - result = smb_proc_setattr_trans2(server, dentry, fattr); - } else { - /* - * Fail silently on directories ... timestamp can't be set? - */ - result = 0; - if (S_ISREG(inode->i_mode)) { - /* - * Set the mtime by opening and closing the file. - * Note that the file is opened read-only, but this - * still allows us to set the date (tridge) - */ - result = -EACCES; - if (!smb_is_open(inode)) - smb_proc_open(server, dentry, SMB_O_RDONLY); - if (smb_is_open(inode)) { - inode->i_mtime = fattr->f_mtime; - result = smb_proc_close_inode(server, inode); - } - } - } - - return result; -} - -int -smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr) -{ - struct smb_sb_info *server = SMB_SB(dentry->d_sb); - int result; - char *p; - long unit; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 0))) - goto out; - - smb_setup_header(req, SMBdskattr, 0, 0); - if ((result = smb_request_ok(req, SMBdskattr, 5, 0)) < 0) - goto out_free; - p = SMB_VWV(req->rq_header); - unit = (WVAL(p, 2) * WVAL(p, 4)) >> SMB_ST_BLKSHIFT; - attr->f_blocks = WVAL(p, 0) * unit; - attr->f_bsize = SMB_ST_BLKSIZE; - attr->f_bavail = attr->f_bfree = WVAL(p, 6) * unit; - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -int -smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, - char *buffer, int len) -{ - char *p, *param; - int result; - struct smb_request *req; - - DEBUG1("readlink of %s/%s\n", DENTRY_PATH(d)); - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - param = req->rq_buffer; - - WSET(param, 0, SMB_QUERY_FILE_UNIX_LINK); - DSET(param, 2, 0); - result = smb_encode_path(server, param+6, SMB_MAXPATHLEN+1, d, NULL); - if (result < 0) - goto out_free; - p = param + 6 + result; - - req->rq_trans2_command = TRANSACT2_QPATHINFO; - req->rq_ldata = 0; - req->rq_data = NULL; - req->rq_lparm = p - param; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out_free; - DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", - ¶m[6], result, req->rq_rcls, req->rq_err); - - /* copy data up to the \0 or buffer length */ - result = len; - if (req->rq_ldata < len) - result = req->rq_ldata; - strncpy(buffer, req->rq_data, result); - -out_free: - smb_rput(req); -out: - return result; -} - - -/* - * Create a symlink object called dentry which points to oldpath. - * Samba does not permit dangling links but returns a suitable error message. - */ -int -smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, - const char *oldpath) -{ - char *p, *param; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - param = req->rq_buffer; - - WSET(param, 0, SMB_SET_FILE_UNIX_LINK); - DSET(param, 2, 0); - result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, d, NULL); - if (result < 0) - goto out_free; - p = param + 6 + result; - - req->rq_trans2_command = TRANSACT2_SETPATHINFO; - req->rq_ldata = strlen(oldpath) + 1; - req->rq_data = (char *) oldpath; - req->rq_lparm = p - param; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out_free; - - DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", - ¶m[6], result, req->rq_rcls, req->rq_err); - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -/* - * Create a hard link object called new_dentry which points to dentry. - */ -int -smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, - struct dentry *new_dentry) -{ - char *p, *param; - int result; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, PAGE_SIZE))) - goto out; - param = req->rq_buffer; - - WSET(param, 0, SMB_SET_FILE_UNIX_HLINK); - DSET(param, 2, 0); - result = smb_encode_path(server, param + 6, SMB_MAXPATHLEN+1, - new_dentry, NULL); - if (result < 0) - goto out_free; - p = param + 6 + result; - - /* Grr, pointless separation of parameters and data ... */ - req->rq_data = p; - req->rq_ldata = smb_encode_path(server, p, SMB_MAXPATHLEN+1, - dentry, NULL); - - req->rq_trans2_command = TRANSACT2_SETPATHINFO; - req->rq_lparm = p - param; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out_free; - - DEBUG1("for %s: result=%d, rcls=%d, err=%d\n", - ¶m[6], result, req->rq_rcls, req->rq_err); - result = 0; - -out_free: - smb_rput(req); -out: - return result; -} - -static int -smb_proc_query_cifsunix(struct smb_sb_info *server) -{ - int result; - int major, minor; - u64 caps; - char param[2]; - struct smb_request *req; - - result = -ENOMEM; - if (! (req = smb_alloc_request(server, 100))) - goto out; - - WSET(param, 0, SMB_QUERY_CIFS_UNIX_INFO); - - req->rq_trans2_command = TRANSACT2_QFSINFO; - req->rq_ldata = 0; - req->rq_data = NULL; - req->rq_lparm = 2; - req->rq_parm = param; - req->rq_flags = 0; - result = smb_add_request(req); - if (result < 0) - goto out_free; - - if (req->rq_ldata < 12) { - PARANOIA("Not enough data\n"); - goto out_free; - } - major = WVAL(req->rq_data, 0); - minor = WVAL(req->rq_data, 2); - - DEBUG1("Server implements CIFS Extensions for UNIX systems v%d.%d\n", - major, minor); - /* FIXME: verify that we are ok with this major/minor? */ - - caps = LVAL(req->rq_data, 4); - DEBUG1("Server capabilities 0x%016llx\n", caps); - -out_free: - smb_rput(req); -out: - return result; -} - - -static void -install_ops(struct smb_ops *dst, struct smb_ops *src) -{ - memcpy(dst, src, sizeof(void *) * SMB_OPS_NUM_STATIC); -} - -/* < LANMAN2 */ -static struct smb_ops smb_ops_core = -{ - .read = smb_proc_read, - .write = smb_proc_write, - .readdir = smb_proc_readdir_short, - .getattr = smb_proc_getattr_core, - .truncate = smb_proc_trunc32, -}; - -/* LANMAN2, OS/2, others? */ -static struct smb_ops smb_ops_os2 = -{ - .read = smb_proc_read, - .write = smb_proc_write, - .readdir = smb_proc_readdir_long, - .getattr = smb_proc_getattr_trans2_std, - .truncate = smb_proc_trunc32, -}; - -/* Win95, and possibly some NetApp versions too */ -static struct smb_ops smb_ops_win95 = -{ - .read = smb_proc_read, /* does not support 12word readX */ - .write = smb_proc_write, - .readdir = smb_proc_readdir_long, - .getattr = smb_proc_getattr_95, - .truncate = smb_proc_trunc95, -}; - -/* Samba, NT4 and NT5 */ -static struct smb_ops smb_ops_winNT = -{ - .read = smb_proc_readX, - .write = smb_proc_writeX, - .readdir = smb_proc_readdir_long, - .getattr = smb_proc_getattr_trans2_all, - .truncate = smb_proc_trunc64, -}; - -/* Samba w/ unix extensions. Others? */ -static struct smb_ops smb_ops_unix = -{ - .read = smb_proc_readX, - .write = smb_proc_writeX, - .readdir = smb_proc_readdir_long, - .getattr = smb_proc_getattr_unix, - /* FIXME: core/ext/time setattr needs to be cleaned up! */ - /* .setattr = smb_proc_setattr_unix, */ - .truncate = smb_proc_trunc64, -}; - -/* Place holder until real ops are in place */ -static struct smb_ops smb_ops_null = -{ - .readdir = smb_proc_readdir_null, - .getattr = smb_proc_getattr_null, -}; - -void smb_install_null_ops(struct smb_ops *ops) -{ - install_ops(ops, &smb_ops_null); -} diff --git a/fs/smbfs/proto.h b/fs/smbfs/proto.h deleted file mode 100644 index 05939a6..0000000 --- a/fs/smbfs/proto.h +++ /dev/null @@ -1,87 +0,0 @@ -/* - * Autogenerated with cproto on: Sat Sep 13 17:18:51 CEST 2003 - */ - -struct smb_request; -struct sock; -struct statfs; - -/* proc.c */ -extern int smb_setcodepage(struct smb_sb_info *server, struct smb_nls_codepage *cp); -extern __u32 smb_len(__u8 *p); -extern int smb_get_rsize(struct smb_sb_info *server); -extern int smb_get_wsize(struct smb_sb_info *server); -extern int smb_errno(struct smb_request *req); -extern int smb_newconn(struct smb_sb_info *server, struct smb_conn_opt *opt); -extern __u8 *smb_setup_header(struct smb_request *req, __u8 command, __u16 wct, __u16 bcc); -extern int smb_open(struct dentry *dentry, int wish); -extern int smb_close(struct inode *ino); -extern int smb_close_fileid(struct dentry *dentry, __u16 fileid); -extern int smb_proc_create(struct dentry *dentry, __u16 attr, time_t ctime, __u16 *fileid); -extern int smb_proc_mv(struct dentry *old_dentry, struct dentry *new_dentry); -extern int smb_proc_mkdir(struct dentry *dentry); -extern int smb_proc_rmdir(struct dentry *dentry); -extern int smb_proc_unlink(struct dentry *dentry); -extern int smb_proc_flush(struct smb_sb_info *server, __u16 fileid); -extern void smb_init_root_dirent(struct smb_sb_info *server, struct smb_fattr *fattr, - struct super_block *sb); -extern int smb_proc_getattr(struct dentry *dir, struct smb_fattr *fattr); -extern int smb_proc_setattr(struct dentry *dir, struct smb_fattr *fattr); -extern int smb_proc_setattr_unix(struct dentry *d, struct iattr *attr, unsigned int major, unsigned int minor); -extern int smb_proc_settime(struct dentry *dentry, struct smb_fattr *fattr); -extern int smb_proc_dskattr(struct dentry *dentry, struct kstatfs *attr); -extern int smb_proc_read_link(struct smb_sb_info *server, struct dentry *d, char *buffer, int len); -extern int smb_proc_symlink(struct smb_sb_info *server, struct dentry *d, const char *oldpath); -extern int smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, struct dentry *new_dentry); -extern void smb_install_null_ops(struct smb_ops *ops); -/* dir.c */ -extern const struct file_operations smb_dir_operations; -extern const struct inode_operations smb_dir_inode_operations; -extern const struct inode_operations smb_dir_inode_operations_unix; -extern void smb_new_dentry(struct dentry *dentry); -extern void smb_renew_times(struct dentry *dentry); -/* cache.c */ -extern void smb_invalid_dir_cache(struct inode *dir); -extern void smb_invalidate_dircache_entries(struct dentry *parent); -extern struct dentry *smb_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos); -extern int smb_fill_cache(struct file *filp, void *dirent, filldir_t filldir, struct smb_cache_control *ctrl, struct qstr *qname, struct smb_fattr *entry); -/* sock.c */ -extern void smb_data_ready(struct sock *sk, int len); -extern int smb_valid_socket(struct inode *inode); -extern void smb_close_socket(struct smb_sb_info *server); -extern int smb_recv_available(struct smb_sb_info *server); -extern int smb_receive_header(struct smb_sb_info *server); -extern int smb_receive_drop(struct smb_sb_info *server); -extern int smb_receive(struct smb_sb_info *server, struct smb_request *req); -extern int smb_send_request(struct smb_request *req); -/* inode.c */ -extern struct inode *smb_iget(struct super_block *sb, struct smb_fattr *fattr); -extern void smb_get_inode_attr(struct inode *inode, struct smb_fattr *fattr); -extern void smb_set_inode_attr(struct inode *inode, struct smb_fattr *fattr); -extern void smb_invalidate_inodes(struct smb_sb_info *server); -extern int smb_revalidate_inode(struct dentry *dentry); -extern int smb_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); -extern int smb_notify_change(struct dentry *dentry, struct iattr *attr); -/* file.c */ -extern const struct address_space_operations smb_file_aops; -extern const struct file_operations smb_file_operations; -extern const struct inode_operations smb_file_inode_operations; -/* ioctl.c */ -extern long smb_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); -/* smbiod.c */ -extern void smbiod_wake_up(void); -extern int smbiod_register_server(struct smb_sb_info *server); -extern void smbiod_unregister_server(struct smb_sb_info *server); -extern void smbiod_flush(struct smb_sb_info *server); -extern int smbiod_retry(struct smb_sb_info *server); -/* request.c */ -extern int smb_init_request_cache(void); -extern void smb_destroy_request_cache(void); -extern struct smb_request *smb_alloc_request(struct smb_sb_info *server, int bufsize); -extern void smb_rput(struct smb_request *req); -extern int smb_add_request(struct smb_request *req); -extern int smb_request_send_server(struct smb_sb_info *server); -extern int smb_request_recv(struct smb_sb_info *server); -/* symlink.c */ -extern int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname); -extern const struct inode_operations smb_link_inode_operations; diff --git a/fs/smbfs/request.c b/fs/smbfs/request.c deleted file mode 100644 index 45f4593..0000000 --- a/fs/smbfs/request.c +++ /dev/null @@ -1,818 +0,0 @@ -/* - * request.c - * - * Copyright (C) 2001 by Urban Widmark - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/fs.h> -#include <linux/slab.h> -#include <linux/net.h> -#include <linux/sched.h> - -#include <linux/smb_fs.h> -#include <linux/smbno.h> -#include <linux/smb_mount.h> - -#include "smb_debug.h" -#include "request.h" -#include "proto.h" - -/* #define SMB_SLAB_DEBUG (SLAB_RED_ZONE | SLAB_POISON) */ -#define SMB_SLAB_DEBUG 0 - -/* cache for request structures */ -static struct kmem_cache *req_cachep; - -static int smb_request_send_req(struct smb_request *req); - -/* - /proc/slabinfo: - name, active, num, objsize, active_slabs, num_slaps, #pages -*/ - - -int smb_init_request_cache(void) -{ - req_cachep = kmem_cache_create("smb_request", - sizeof(struct smb_request), 0, - SMB_SLAB_DEBUG | SLAB_HWCACHE_ALIGN, - NULL); - if (req_cachep == NULL) - return -ENOMEM; - - return 0; -} - -void smb_destroy_request_cache(void) -{ - kmem_cache_destroy(req_cachep); -} - -/* - * Allocate and initialise a request structure - */ -static struct smb_request *smb_do_alloc_request(struct smb_sb_info *server, - int bufsize) -{ - struct smb_request *req; - unsigned char *buf = NULL; - - req = kmem_cache_zalloc(req_cachep, GFP_KERNEL); - VERBOSE("allocating request: %p\n", req); - if (!req) - goto out; - - if (bufsize > 0) { - buf = kmalloc(bufsize, GFP_NOFS); - if (!buf) { - kmem_cache_free(req_cachep, req); - return NULL; - } - } - - req->rq_buffer = buf; - req->rq_bufsize = bufsize; - req->rq_server = server; - init_waitqueue_head(&req->rq_wait); - INIT_LIST_HEAD(&req->rq_queue); - atomic_set(&req->rq_count, 1); - -out: - return req; -} - -struct smb_request *smb_alloc_request(struct smb_sb_info *server, int bufsize) -{ - struct smb_request *req = NULL; - - for (;;) { - atomic_inc(&server->nr_requests); - if (atomic_read(&server->nr_requests) <= MAX_REQUEST_HARD) { - req = smb_do_alloc_request(server, bufsize); - if (req != NULL) - break; - } - -#if 0 - /* - * Try to free up at least one request in order to stay - * below the hard limit - */ - if (nfs_try_to_free_pages(server)) - continue; - - if (fatal_signal_pending(current)) - return ERR_PTR(-ERESTARTSYS); - current->policy = SCHED_YIELD; - schedule(); -#else - /* FIXME: we want something like nfs does above, but that - requires changes to all callers and can wait. */ - break; -#endif - } - return req; -} - -static void smb_free_request(struct smb_request *req) -{ - atomic_dec(&req->rq_server->nr_requests); - if (req->rq_buffer && !(req->rq_flags & SMB_REQ_STATIC)) - kfree(req->rq_buffer); - kfree(req->rq_trans2buffer); - kmem_cache_free(req_cachep, req); -} - -/* - * What prevents a rget to race with a rput? The count must never drop to zero - * while it is in use. Only rput if it is ok that it is free'd. - */ -static void smb_rget(struct smb_request *req) -{ - atomic_inc(&req->rq_count); -} -void smb_rput(struct smb_request *req) -{ - if (atomic_dec_and_test(&req->rq_count)) { - list_del_init(&req->rq_queue); - smb_free_request(req); - } -} - -/* setup to receive the data part of the SMB */ -static int smb_setup_bcc(struct smb_request *req) -{ - int result = 0; - req->rq_rlen = smb_len(req->rq_header) + 4 - req->rq_bytes_recvd; - - if (req->rq_rlen > req->rq_bufsize) { - PARANOIA("Packet too large %d > %d\n", - req->rq_rlen, req->rq_bufsize); - return -ENOBUFS; - } - - req->rq_iov[0].iov_base = req->rq_buffer; - req->rq_iov[0].iov_len = req->rq_rlen; - req->rq_iovlen = 1; - - return result; -} - -/* - * Prepare a "normal" request structure. - */ -static int smb_setup_request(struct smb_request *req) -{ - int len = smb_len(req->rq_header) + 4; - req->rq_slen = len; - - /* if we expect a data part in the reply we set the iov's to read it */ - if (req->rq_resp_bcc) - req->rq_setup_read = smb_setup_bcc; - - /* This tries to support re-using the same request */ - req->rq_bytes_sent = 0; - req->rq_rcls = 0; - req->rq_err = 0; - req->rq_errno = 0; - req->rq_fragment = 0; - kfree(req->rq_trans2buffer); - req->rq_trans2buffer = NULL; - - return 0; -} - -/* - * Prepare a transaction2 request structure - */ -static int smb_setup_trans2request(struct smb_request *req) -{ - struct smb_sb_info *server = req->rq_server; - int mparam, mdata; - static unsigned char padding[4]; - - /* I know the following is very ugly, but I want to build the - smb packet as efficiently as possible. */ - - const int smb_parameters = 15; - const int header = SMB_HEADER_LEN + 2 * smb_parameters + 2; - const int oparam = ALIGN(header + 3, sizeof(u32)); - const int odata = ALIGN(oparam + req->rq_lparm, sizeof(u32)); - const int bcc = (req->rq_data ? odata + req->rq_ldata : - oparam + req->rq_lparm) - header; - - if ((bcc + oparam) > server->opt.max_xmit) - return -ENOMEM; - smb_setup_header(req, SMBtrans2, smb_parameters, bcc); - - /* - * max parameters + max data + max setup == bufsize to make NT4 happy - * and not abort the transfer or split into multiple responses. It also - * makes smbfs happy as handling packets larger than the buffer size - * is extra work. - * - * OS/2 is probably going to hate me for this ... - */ - mparam = SMB_TRANS2_MAX_PARAM; - mdata = req->rq_bufsize - mparam; - - mdata = server->opt.max_xmit - mparam - 100; - if (mdata < 1024) { - mdata = 1024; - mparam = 20; - } - -#if 0 - /* NT/win2k has ~4k max_xmit, so with this we request more than it wants - to return as one SMB. Useful for testing the fragmented trans2 - handling. */ - mdata = 8192; -#endif - - WSET(req->rq_header, smb_tpscnt, req->rq_lparm); - WSET(req->rq_header, smb_tdscnt, req->rq_ldata); - WSET(req->rq_header, smb_mprcnt, mparam); - WSET(req->rq_header, smb_mdrcnt, mdata); - WSET(req->rq_header, smb_msrcnt, 0); /* max setup always 0 ? */ - WSET(req->rq_header, smb_flags, 0); - DSET(req->rq_header, smb_timeout, 0); - WSET(req->rq_header, smb_pscnt, req->rq_lparm); - WSET(req->rq_header, smb_psoff, oparam - 4); - WSET(req->rq_header, smb_dscnt, req->rq_ldata); - WSET(req->rq_header, smb_dsoff, req->rq_data ? odata - 4 : 0); - *(req->rq_header + smb_suwcnt) = 0x01; /* setup count */ - *(req->rq_header + smb_suwcnt + 1) = 0x00; /* reserved */ - WSET(req->rq_header, smb_setup0, req->rq_trans2_command); - - req->rq_iovlen = 2; - req->rq_iov[0].iov_base = (void *) req->rq_header; - req->rq_iov[0].iov_len = oparam; - req->rq_iov[1].iov_base = (req->rq_parm==NULL) ? padding : req->rq_parm; - req->rq_iov[1].iov_len = req->rq_lparm; - req->rq_slen = oparam + req->rq_lparm; - - if (req->rq_data) { - req->rq_iovlen += 2; - req->rq_iov[2].iov_base = padding; - req->rq_iov[2].iov_len = odata - oparam - req->rq_lparm; - req->rq_iov[3].iov_base = req->rq_data; - req->rq_iov[3].iov_len = req->rq_ldata; - req->rq_slen = odata + req->rq_ldata; - } - - /* always a data part for trans2 replies */ - req->rq_setup_read = smb_setup_bcc; - - return 0; -} - -/* - * Add a request and tell smbiod to process it - */ -int smb_add_request(struct smb_request *req) -{ - long timeleft; - struct smb_sb_info *server = req->rq_server; - int result = 0; - - smb_setup_request(req); - if (req->rq_trans2_command) { - if (req->rq_buffer == NULL) { - PARANOIA("trans2 attempted without response buffer!\n"); - return -EIO; - } - result = smb_setup_trans2request(req); - } - if (result < 0) - return result; - -#ifdef SMB_DEBUG_PACKET_SIZE - add_xmit_stats(req); -#endif - - /* add 'req' to the queue of requests */ - if (smb_lock_server_interruptible(server)) - return -EINTR; - - /* - * Try to send the request as the process. If that fails we queue the - * request and let smbiod send it later. - */ - - /* FIXME: each server has a number on the maximum number of parallel - requests. 10, 50 or so. We should not allow more requests to be - active. */ - if (server->mid > 0xf000) - server->mid = 0; - req->rq_mid = server->mid++; - WSET(req->rq_header, smb_mid, req->rq_mid); - - result = 0; - if (server->state == CONN_VALID) { - if (list_empty(&server->xmitq)) - result = smb_request_send_req(req); - if (result < 0) { - /* Connection lost? */ - server->conn_error = result; - server->state = CONN_INVALID; - } - } - if (result != 1) - list_add_tail(&req->rq_queue, &server->xmitq); - smb_rget(req); - - if (server->state != CONN_VALID) - smbiod_retry(server); - - smb_unlock_server(server); - - smbiod_wake_up(); - - timeleft = wait_event_interruptible_timeout(req->rq_wait, - req->rq_flags & SMB_REQ_RECEIVED, 30*HZ); - if (!timeleft || signal_pending(current)) { - /* - * On timeout or on interrupt we want to try and remove the - * request from the recvq/xmitq. - * First check if the request is still part of a queue. (May - * have been removed by some error condition) - */ - smb_lock_server(server); - if (!list_empty(&req->rq_queue)) { - list_del_init(&req->rq_queue); - smb_rput(req); - } - smb_unlock_server(server); - } - - if (!timeleft) { - PARANOIA("request [%p, mid=%d] timed out!\n", - req, req->rq_mid); - VERBOSE("smb_com: %02x\n", *(req->rq_header + smb_com)); - VERBOSE("smb_rcls: %02x\n", *(req->rq_header + smb_rcls)); - VERBOSE("smb_flg: %02x\n", *(req->rq_header + smb_flg)); - VERBOSE("smb_tid: %04x\n", WVAL(req->rq_header, smb_tid)); - VERBOSE("smb_pid: %04x\n", WVAL(req->rq_header, smb_pid)); - VERBOSE("smb_uid: %04x\n", WVAL(req->rq_header, smb_uid)); - VERBOSE("smb_mid: %04x\n", WVAL(req->rq_header, smb_mid)); - VERBOSE("smb_wct: %02x\n", *(req->rq_header + smb_wct)); - - req->rq_rcls = ERRSRV; - req->rq_err = ERRtimeout; - - /* Just in case it was "stuck" */ - smbiod_wake_up(); - } - VERBOSE("woke up, rcls=%d\n", req->rq_rcls); - - if (req->rq_rcls != 0) - req->rq_errno = smb_errno(req); - if (signal_pending(current)) - req->rq_errno = -ERESTARTSYS; - return req->rq_errno; -} - -/* - * Send a request and place it on the recvq if successfully sent. - * Must be called with the server lock held. - */ -static int smb_request_send_req(struct smb_request *req) -{ - struct smb_sb_info *server = req->rq_server; - int result; - - if (req->rq_bytes_sent == 0) { - WSET(req->rq_header, smb_tid, server->opt.tid); - WSET(req->rq_header, smb_pid, 1); - WSET(req->rq_header, smb_uid, server->opt.server_uid); - } - - result = smb_send_request(req); - if (result < 0 && result != -EAGAIN) - goto out; - - result = 0; - if (!(req->rq_flags & SMB_REQ_TRANSMITTED)) - goto out; - - list_move_tail(&req->rq_queue, &server->recvq); - result = 1; -out: - return result; -} - -/* - * Sends one request for this server. (smbiod) - * Must be called with the server lock held. - * Returns: <0 on error - * 0 if no request could be completely sent - * 1 if all data for one request was sent - */ -int smb_request_send_server(struct smb_sb_info *server) -{ - struct list_head *head; - struct smb_request *req; - int result; - - if (server->state != CONN_VALID) - return 0; - - /* dequeue first request, if any */ - req = NULL; - head = server->xmitq.next; - if (head != &server->xmitq) { - req = list_entry(head, struct smb_request, rq_queue); - } - if (!req) - return 0; - - result = smb_request_send_req(req); - if (result < 0) { - server->conn_error = result; - list_move(&req->rq_queue, &server->xmitq); - result = -EIO; - goto out; - } - -out: - return result; -} - -/* - * Try to find a request matching this "mid". Typically the first entry will - * be the matching one. - */ -static struct smb_request *find_request(struct smb_sb_info *server, int mid) -{ - struct list_head *tmp; - struct smb_request *req = NULL; - - list_for_each(tmp, &server->recvq) { - req = list_entry(tmp, struct smb_request, rq_queue); - if (req->rq_mid == mid) { - break; - } - req = NULL; - } - - if (!req) { - VERBOSE("received reply with mid %d but no request!\n", - WVAL(server->header, smb_mid)); - server->rstate = SMB_RECV_DROP; - } - - return req; -} - -/* - * Called when we have read the smb header and believe this is a response. - */ -static int smb_init_request(struct smb_sb_info *server, struct smb_request *req) -{ - int hdrlen, wct; - - memcpy(req->rq_header, server->header, SMB_HEADER_LEN); - - wct = *(req->rq_header + smb_wct); - if (wct > 20) { - PARANOIA("wct too large, %d > 20\n", wct); - server->rstate = SMB_RECV_DROP; - return 0; - } - - req->rq_resp_wct = wct; - hdrlen = SMB_HEADER_LEN + wct*2 + 2; - VERBOSE("header length: %d smb_wct: %2d\n", hdrlen, wct); - - req->rq_bytes_recvd = SMB_HEADER_LEN; - req->rq_rlen = hdrlen; - req->rq_iov[0].iov_base = req->rq_header; - req->rq_iov[0].iov_len = hdrlen; - req->rq_iovlen = 1; - server->rstate = SMB_RECV_PARAM; - -#ifdef SMB_DEBUG_PACKET_SIZE - add_recv_stats(smb_len(server->header)); -#endif - return 0; -} - -/* - * Reads the SMB parameters - */ -static int smb_recv_param(struct smb_sb_info *server, struct smb_request *req) -{ - int result; - - result = smb_receive(server, req); - if (result < 0) - return result; - if (req->rq_bytes_recvd < req->rq_rlen) - return 0; - - VERBOSE("result: %d smb_bcc: %04x\n", result, - WVAL(req->rq_header, SMB_HEADER_LEN + - (*(req->rq_header + smb_wct) * 2))); - - result = 0; - req->rq_iov[0].iov_base = NULL; - req->rq_rlen = 0; - if (req->rq_callback) - req->rq_callback(req); - else if (req->rq_setup_read) - result = req->rq_setup_read(req); - if (result < 0) { - server->rstate = SMB_RECV_DROP; - return result; - } - - server->rstate = req->rq_rlen > 0 ? SMB_RECV_DATA : SMB_RECV_END; - - req->rq_bytes_recvd = 0; // recvd out of the iov - - VERBOSE("rlen: %d\n", req->rq_rlen); - if (req->rq_rlen < 0) { - PARANOIA("Parameters read beyond end of packet!\n"); - server->rstate = SMB_RECV_END; - return -EIO; - } - return 0; -} - -/* - * Reads the SMB data - */ -static int smb_recv_data(struct smb_sb_info *server, struct smb_request *req) -{ - int result; - - result = smb_receive(server, req); - if (result < 0) - goto out; - if (req->rq_bytes_recvd < req->rq_rlen) - goto out; - server->rstate = SMB_RECV_END; -out: - VERBOSE("result: %d\n", result); - return result; -} - -/* - * Receive a transaction2 response - * Return: 0 if the response has been fully read - * 1 if there are further "fragments" to read - * <0 if there is an error - */ -static int smb_recv_trans2(struct smb_sb_info *server, struct smb_request *req) -{ - unsigned char *inbuf; - unsigned int parm_disp, parm_offset, parm_count, parm_tot; - unsigned int data_disp, data_offset, data_count, data_tot; - int hdrlen = SMB_HEADER_LEN + req->rq_resp_wct*2 - 2; - - VERBOSE("handling trans2\n"); - - inbuf = req->rq_header; - data_tot = WVAL(inbuf, smb_tdrcnt); - parm_tot = WVAL(inbuf, smb_tprcnt); - parm_disp = WVAL(inbuf, smb_prdisp); - parm_offset = WVAL(inbuf, smb_proff); - parm_count = WVAL(inbuf, smb_prcnt); - data_disp = WVAL(inbuf, smb_drdisp); - data_offset = WVAL(inbuf, smb_droff); - data_count = WVAL(inbuf, smb_drcnt); - - /* Modify offset for the split header/buffer we use */ - if (data_count || data_offset) { - if (unlikely(data_offset < hdrlen)) - goto out_bad_data; - else - data_offset -= hdrlen; - } - if (parm_count || parm_offset) { - if (unlikely(parm_offset < hdrlen)) - goto out_bad_parm; - else - parm_offset -= hdrlen; - } - - if (parm_count == parm_tot && data_count == data_tot) { - /* - * This packet has all the trans2 data. - * - * We setup the request so that this will be the common - * case. It may be a server error to not return a - * response that fits. - */ - VERBOSE("single trans2 response " - "dcnt=%u, pcnt=%u, doff=%u, poff=%u\n", - data_count, parm_count, - data_offset, parm_offset); - req->rq_ldata = data_count; - req->rq_lparm = parm_count; - req->rq_data = req->rq_buffer + data_offset; - req->rq_parm = req->rq_buffer + parm_offset; - if (unlikely(parm_offset + parm_count > req->rq_rlen)) - goto out_bad_parm; - if (unlikely(data_offset + data_count > req->rq_rlen)) - goto out_bad_data; - return 0; - } - - VERBOSE("multi trans2 response " - "frag=%d, dcnt=%u, pcnt=%u, doff=%u, poff=%u\n", - req->rq_fragment, - data_count, parm_count, - data_offset, parm_offset); - - if (!req->rq_fragment) { - int buf_len; - - /* We got the first trans2 fragment */ - req->rq_fragment = 1; - req->rq_total_data = data_tot; - req->rq_total_parm = parm_tot; - req->rq_ldata = 0; - req->rq_lparm = 0; - - buf_len = data_tot + parm_tot; - if (buf_len > SMB_MAX_PACKET_SIZE) - goto out_too_long; - - req->rq_trans2bufsize = buf_len; - req->rq_trans2buffer = kzalloc(buf_len, GFP_NOFS); - if (!req->rq_trans2buffer) - goto out_no_mem; - - req->rq_parm = req->rq_trans2buffer; - req->rq_data = req->rq_trans2buffer + parm_tot; - } else if (unlikely(req->rq_total_data < data_tot || - req->rq_total_parm < parm_tot)) - goto out_data_grew; - - if (unlikely(parm_disp + parm_count > req->rq_total_parm || - parm_offset + parm_count > req->rq_rlen)) - goto out_bad_parm; - if (unlikely(data_disp + data_count > req->rq_total_data || - data_offset + data_count > req->rq_rlen)) - goto out_bad_data; - - inbuf = req->rq_buffer; - memcpy(req->rq_parm + parm_disp, inbuf + parm_offset, parm_count); - memcpy(req->rq_data + data_disp, inbuf + data_offset, data_count); - - req->rq_ldata += data_count; - req->rq_lparm += parm_count; - - /* - * Check whether we've received all of the data. Note that - * we use the packet totals -- total lengths might shrink! - */ - if (req->rq_ldata >= data_tot && req->rq_lparm >= parm_tot) { - req->rq_ldata = data_tot; - req->rq_lparm = parm_tot; - return 0; - } - return 1; - -out_too_long: - printk(KERN_ERR "smb_trans2: data/param too long, data=%u, parm=%u\n", - data_tot, parm_tot); - goto out_EIO; -out_no_mem: - printk(KERN_ERR "smb_trans2: couldn't allocate data area of %d bytes\n", - req->rq_trans2bufsize); - req->rq_errno = -ENOMEM; - goto out; -out_data_grew: - printk(KERN_ERR "smb_trans2: data/params grew!\n"); - goto out_EIO; -out_bad_parm: - printk(KERN_ERR "smb_trans2: invalid parms, disp=%u, cnt=%u, tot=%u, ofs=%u\n", - parm_disp, parm_count, parm_tot, parm_offset); - goto out_EIO; -out_bad_data: - printk(KERN_ERR "smb_trans2: invalid data, disp=%u, cnt=%u, tot=%u, ofs=%u\n", - data_disp, data_count, data_tot, data_offset); -out_EIO: - req->rq_errno = -EIO; -out: - return req->rq_errno; -} - -/* - * State machine for receiving responses. We handle the fact that we can't - * read the full response in one try by having states telling us how much we - * have read. - * - * Must be called with the server lock held (only called from smbiod). - * - * Return: <0 on error - */ -int smb_request_recv(struct smb_sb_info *server) -{ - struct smb_request *req = NULL; - int result = 0; - - if (smb_recv_available(server) <= 0) - return 0; - - VERBOSE("state: %d\n", server->rstate); - switch (server->rstate) { - case SMB_RECV_DROP: - result = smb_receive_drop(server); - if (result < 0) - break; - if (server->rstate == SMB_RECV_DROP) - break; - server->rstate = SMB_RECV_START; - /* fallthrough */ - case SMB_RECV_START: - server->smb_read = 0; - server->rstate = SMB_RECV_HEADER; - /* fallthrough */ - case SMB_RECV_HEADER: - result = smb_receive_header(server); - if (result < 0) - break; - if (server->rstate == SMB_RECV_HEADER) - break; - if (! (*(server->header + smb_flg) & SMB_FLAGS_REPLY) ) { - server->rstate = SMB_RECV_REQUEST; - break; - } - if (server->rstate != SMB_RECV_HCOMPLETE) - break; - /* fallthrough */ - case SMB_RECV_HCOMPLETE: - req = find_request(server, WVAL(server->header, smb_mid)); - if (!req) - break; - smb_init_request(server, req); - req->rq_rcls = *(req->rq_header + smb_rcls); - req->rq_err = WVAL(req->rq_header, smb_err); - if (server->rstate != SMB_RECV_PARAM) - break; - /* fallthrough */ - case SMB_RECV_PARAM: - if (!req) - req = find_request(server,WVAL(server->header,smb_mid)); - if (!req) - break; - result = smb_recv_param(server, req); - if (result < 0) - break; - if (server->rstate != SMB_RECV_DATA) - break; - /* fallthrough */ - case SMB_RECV_DATA: - if (!req) - req = find_request(server,WVAL(server->header,smb_mid)); - if (!req) - break; - result = smb_recv_data(server, req); - if (result < 0) - break; - break; - - /* We should never be called with any of these states */ - case SMB_RECV_END: - case SMB_RECV_REQUEST: - BUG(); - } - - if (result < 0) { - /* We saw an error */ - return result; - } - - if (server->rstate != SMB_RECV_END) - return 0; - - result = 0; - if (req->rq_trans2_command && req->rq_rcls == SUCCESS) - result = smb_recv_trans2(server, req); - - /* - * Response completely read. Drop any extra bytes sent by the server. - * (Yes, servers sometimes add extra bytes to responses) - */ - VERBOSE("smb_len: %d smb_read: %d\n", - server->smb_len, server->smb_read); - if (server->smb_read < server->smb_len) - smb_receive_drop(server); - - server->rstate = SMB_RECV_START; - - if (!result) { - list_del_init(&req->rq_queue); - req->rq_flags |= SMB_REQ_RECEIVED; - smb_rput(req); - wake_up_interruptible(&req->rq_wait); - } - return 0; -} diff --git a/fs/smbfs/request.h b/fs/smbfs/request.h deleted file mode 100644 index efb2145..0000000 --- a/fs/smbfs/request.h +++ /dev/null @@ -1,70 +0,0 @@ -#include <linux/list.h> -#include <linux/types.h> -#include <linux/uio.h> -#include <linux/wait.h> - -struct smb_request { - struct list_head rq_queue; /* recvq or xmitq for the server */ - - atomic_t rq_count; - - wait_queue_head_t rq_wait; - int rq_flags; - int rq_mid; /* multiplex ID, set by request.c */ - - struct smb_sb_info *rq_server; - - /* header + word count + parameter words + byte count */ - unsigned char rq_header[SMB_HEADER_LEN + 20*2 + 2]; - - int rq_bufsize; - unsigned char *rq_buffer; - - /* FIXME: this is not good enough for merging IO requests. */ - unsigned char *rq_page; - int rq_rsize; - - int rq_resp_wct; - int rq_resp_bcc; - - int rq_rlen; - int rq_bytes_recvd; - - int rq_slen; - int rq_bytes_sent; - - int rq_iovlen; - struct kvec rq_iov[4]; - - int (*rq_setup_read) (struct smb_request *); - void (*rq_callback) (struct smb_request *); - - /* ------ trans2 stuff ------ */ - - u16 rq_trans2_command; /* 0 if not a trans2 request */ - unsigned int rq_ldata; - unsigned char *rq_data; - unsigned int rq_lparm; - unsigned char *rq_parm; - - int rq_fragment; - u32 rq_total_data; - u32 rq_total_parm; - int rq_trans2bufsize; - unsigned char *rq_trans2buffer; - - /* ------ response ------ */ - - unsigned short rq_rcls; - unsigned short rq_err; - int rq_errno; -}; - -#define SMB_REQ_STATIC 0x0001 /* rq_buffer is static */ -#define SMB_REQ_NORETRY 0x0002 /* request is invalid after retry */ - -#define SMB_REQ_TRANSMITTED 0x4000 /* all data has been sent */ -#define SMB_REQ_RECEIVED 0x8000 /* reply received, smbiod is done */ - -#define xSMB_REQ_NOREPLY 0x0004 /* we don't want the reply (if any) */ -#define xSMB_REQ_NORECEIVER 0x0008 /* caller doesn't wait for response */ diff --git a/fs/smbfs/smb_debug.h b/fs/smbfs/smb_debug.h deleted file mode 100644 index fc4b1a5..0000000 --- a/fs/smbfs/smb_debug.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * Defines some debug macros for smbfs. - */ - -/* This makes a dentry parent/child name pair. Useful for debugging printk's */ -#define DENTRY_PATH(dentry) \ - (dentry)->d_parent->d_name.name,(dentry)->d_name.name - -/* - * safety checks that should never happen ??? - * these are normally enabled. - */ -#ifdef SMBFS_PARANOIA -# define PARANOIA(f, a...) printk(KERN_NOTICE "%s: " f, __func__ , ## a) -#else -# define PARANOIA(f, a...) do { ; } while(0) -#endif - -/* lots of debug messages */ -#ifdef SMBFS_DEBUG_VERBOSE -# define VERBOSE(f, a...) printk(KERN_DEBUG "%s: " f, __func__ , ## a) -#else -# define VERBOSE(f, a...) do { ; } while(0) -#endif - -/* - * "normal" debug messages, but not with a normal DEBUG define ... way - * too common name. - */ -#ifdef SMBFS_DEBUG -#define DEBUG1(f, a...) printk(KERN_DEBUG "%s: " f, __func__ , ## a) -#else -#define DEBUG1(f, a...) do { ; } while(0) -#endif diff --git a/fs/smbfs/smbiod.c b/fs/smbfs/smbiod.c deleted file mode 100644 index 0e39a92..0000000 --- a/fs/smbfs/smbiod.c +++ /dev/null @@ -1,344 +0,0 @@ -/* - * smbiod.c - * - * Copyright (C) 2000, Charles Loep / Corel Corp. - * Copyright (C) 2001, Urban Widmark - */ - - -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/string.h> -#include <linux/stat.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/file.h> -#include <linux/dcache.h> -#include <linux/module.h> -#include <linux/net.h> -#include <linux/kthread.h> -#include <net/ip.h> - -#include <linux/smb_fs.h> -#include <linux/smbno.h> -#include <linux/smb_mount.h> - -#include <asm/system.h> -#include <asm/uaccess.h> - -#include "smb_debug.h" -#include "request.h" -#include "proto.h" - -enum smbiod_state { - SMBIOD_DEAD, - SMBIOD_STARTING, - SMBIOD_RUNNING, -}; - -static enum smbiod_state smbiod_state = SMBIOD_DEAD; -static struct task_struct *smbiod_thread; -static DECLARE_WAIT_QUEUE_HEAD(smbiod_wait); -static LIST_HEAD(smb_servers); -static DEFINE_SPINLOCK(servers_lock); - -#define SMBIOD_DATA_READY (1<<0) -static unsigned long smbiod_flags; - -static int smbiod(void *); -static int smbiod_start(void); - -/* - * called when there's work for us to do - */ -void smbiod_wake_up(void) -{ - if (smbiod_state == SMBIOD_DEAD) - return; - set_bit(SMBIOD_DATA_READY, &smbiod_flags); - wake_up_interruptible(&smbiod_wait); -} - -/* - * start smbiod if none is running - */ -static int smbiod_start(void) -{ - struct task_struct *tsk; - int err = 0; - - if (smbiod_state != SMBIOD_DEAD) - return 0; - smbiod_state = SMBIOD_STARTING; - __module_get(THIS_MODULE); - spin_unlock(&servers_lock); - tsk = kthread_run(smbiod, NULL, "smbiod"); - if (IS_ERR(tsk)) { - err = PTR_ERR(tsk); - module_put(THIS_MODULE); - } - - spin_lock(&servers_lock); - if (err < 0) { - smbiod_state = SMBIOD_DEAD; - smbiod_thread = NULL; - } else { - smbiod_state = SMBIOD_RUNNING; - smbiod_thread = tsk; - } - return err; -} - -/* - * register a server & start smbiod if necessary - */ -int smbiod_register_server(struct smb_sb_info *server) -{ - int ret; - spin_lock(&servers_lock); - list_add(&server->entry, &smb_servers); - VERBOSE("%p\n", server); - ret = smbiod_start(); - spin_unlock(&servers_lock); - return ret; -} - -/* - * Unregister a server - * Must be called with the server lock held. - */ -void smbiod_unregister_server(struct smb_sb_info *server) -{ - spin_lock(&servers_lock); - list_del_init(&server->entry); - VERBOSE("%p\n", server); - spin_unlock(&servers_lock); - - smbiod_wake_up(); - smbiod_flush(server); -} - -void smbiod_flush(struct smb_sb_info *server) -{ - struct list_head *tmp, *n; - struct smb_request *req; - - list_for_each_safe(tmp, n, &server->xmitq) { - req = list_entry(tmp, struct smb_request, rq_queue); - req->rq_errno = -EIO; - list_del_init(&req->rq_queue); - smb_rput(req); - wake_up_interruptible(&req->rq_wait); - } - list_for_each_safe(tmp, n, &server->recvq) { - req = list_entry(tmp, struct smb_request, rq_queue); - req->rq_errno = -EIO; - list_del_init(&req->rq_queue); - smb_rput(req); - wake_up_interruptible(&req->rq_wait); - } -} - -/* - * Wake up smbmount and make it reconnect to the server. - * This must be called with the server locked. - * - * FIXME: add smbconnect version to this - */ -int smbiod_retry(struct smb_sb_info *server) -{ - struct list_head *head; - struct smb_request *req; - struct pid *pid = get_pid(server->conn_pid); - int result = 0; - - VERBOSE("state: %d\n", server->state); - if (server->state == CONN_VALID || server->state == CONN_RETRYING) - goto out; - - smb_invalidate_inodes(server); - - /* - * Some requests are meaningless after a retry, so we abort them. - * One example are all requests using 'fileid' since the files are - * closed on retry. - */ - head = server->xmitq.next; - while (head != &server->xmitq) { - req = list_entry(head, struct smb_request, rq_queue); - head = head->next; - - req->rq_bytes_sent = 0; - if (req->rq_flags & SMB_REQ_NORETRY) { - VERBOSE("aborting request %p on xmitq\n", req); - req->rq_errno = -EIO; - list_del_init(&req->rq_queue); - smb_rput(req); - wake_up_interruptible(&req->rq_wait); - } - } - - /* - * FIXME: test the code for retrying request we already sent - */ - head = server->recvq.next; - while (head != &server->recvq) { - req = list_entry(head, struct smb_request, rq_queue); - head = head->next; -#if 0 - if (req->rq_flags & SMB_REQ_RETRY) { - /* must move the request to the xmitq */ - VERBOSE("retrying request %p on recvq\n", req); - list_move(&req->rq_queue, &server->xmitq); - continue; - } -#endif - - VERBOSE("aborting request %p on recvq\n", req); - /* req->rq_rcls = ???; */ /* FIXME: set smb error code too? */ - req->rq_errno = -EIO; - list_del_init(&req->rq_queue); - smb_rput(req); - wake_up_interruptible(&req->rq_wait); - } - - smb_close_socket(server); - - if (!pid) { - /* FIXME: this is fatal, umount? */ - printk(KERN_ERR "smb_retry: no connection process\n"); - server->state = CONN_RETRIED; - goto out; - } - - /* - * Change state so that only one retry per server will be started. - */ - server->state = CONN_RETRYING; - - /* - * Note: use the "priv" flag, as a user process may need to reconnect. - */ - result = kill_pid(pid, SIGUSR1, 1); - if (result) { - /* FIXME: this is most likely fatal, umount? */ - printk(KERN_ERR "smb_retry: signal failed [%d]\n", result); - goto out; - } - VERBOSE("signalled pid %d\n", pid_nr(pid)); - - /* FIXME: The retried requests should perhaps get a "time boost". */ - -out: - put_pid(pid); - return result; -} - -/* - * Currently handles lockingX packets. - */ -static void smbiod_handle_request(struct smb_sb_info *server) -{ - PARANOIA("smbiod got a request ... and we don't implement oplocks!\n"); - server->rstate = SMB_RECV_DROP; -} - -/* - * Do some IO for one server. - */ -static void smbiod_doio(struct smb_sb_info *server) -{ - int result; - int maxwork = 7; - - if (server->state != CONN_VALID) - goto out; - - do { - result = smb_request_recv(server); - if (result < 0) { - server->state = CONN_INVALID; - smbiod_retry(server); - goto out; /* reconnecting is slow */ - } else if (server->rstate == SMB_RECV_REQUEST) - smbiod_handle_request(server); - } while (result > 0 && maxwork-- > 0); - - /* - * If there is more to read then we want to be sure to wake up again. - */ - if (server->state != CONN_VALID) - goto out; - if (smb_recv_available(server) > 0) - set_bit(SMBIOD_DATA_READY, &smbiod_flags); - - do { - result = smb_request_send_server(server); - if (result < 0) { - server->state = CONN_INVALID; - smbiod_retry(server); - goto out; /* reconnecting is slow */ - } - } while (result > 0); - - /* - * If the last request was not sent out we want to wake up again. - */ - if (!list_empty(&server->xmitq)) - set_bit(SMBIOD_DATA_READY, &smbiod_flags); - -out: - return; -} - -/* - * smbiod kernel thread - */ -static int smbiod(void *unused) -{ - VERBOSE("SMB Kernel thread starting (%d) ...\n", current->pid); - - for (;;) { - struct smb_sb_info *server; - struct list_head *pos, *n; - - /* FIXME: Use poll? */ - wait_event_interruptible(smbiod_wait, - test_bit(SMBIOD_DATA_READY, &smbiod_flags)); - if (signal_pending(current)) { - spin_lock(&servers_lock); - smbiod_state = SMBIOD_DEAD; - spin_unlock(&servers_lock); - break; - } - - clear_bit(SMBIOD_DATA_READY, &smbiod_flags); - - spin_lock(&servers_lock); - if (list_empty(&smb_servers)) { - smbiod_state = SMBIOD_DEAD; - spin_unlock(&servers_lock); - break; - } - - list_for_each_safe(pos, n, &smb_servers) { - server = list_entry(pos, struct smb_sb_info, entry); - VERBOSE("checking server %p\n", server); - - if (server->state == CONN_VALID) { - spin_unlock(&servers_lock); - - smb_lock_server(server); - smbiod_doio(server); - smb_unlock_server(server); - - spin_lock(&servers_lock); - } - } - spin_unlock(&servers_lock); - } - - VERBOSE("SMB Kernel thread exiting (%d) ...\n", current->pid); - module_put_and_exit(0); -} diff --git a/fs/smbfs/sock.c b/fs/smbfs/sock.c deleted file mode 100644 index e37fe4d..0000000 --- a/fs/smbfs/sock.c +++ /dev/null @@ -1,386 +0,0 @@ -/* - * sock.c - * - * Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke - * Copyright (C) 1997 by Volker Lendecke - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/fs.h> -#include <linux/time.h> -#include <linux/errno.h> -#include <linux/socket.h> -#include <linux/fcntl.h> -#include <linux/file.h> -#include <linux/in.h> -#include <linux/net.h> -#include <linux/mm.h> -#include <linux/netdevice.h> -#include <linux/workqueue.h> -#include <net/scm.h> -#include <net/tcp_states.h> -#include <net/ip.h> - -#include <linux/smb_fs.h> -#include <linux/smb.h> -#include <linux/smbno.h> - -#include <asm/uaccess.h> -#include <asm/ioctls.h> - -#include "smb_debug.h" -#include "proto.h" -#include "request.h" - - -static int -_recvfrom(struct socket *socket, unsigned char *ubuf, int size, unsigned flags) -{ - struct kvec iov = {ubuf, size}; - struct msghdr msg = {.msg_flags = flags}; - msg.msg_flags |= MSG_DONTWAIT | MSG_NOSIGNAL; - return kernel_recvmsg(socket, &msg, &iov, 1, size, msg.msg_flags); -} - -/* - * Return the server this socket belongs to - */ -static struct smb_sb_info * -server_from_socket(struct socket *socket) -{ - return socket->sk->sk_user_data; -} - -/* - * Called when there is data on the socket. - */ -void -smb_data_ready(struct sock *sk, int len) -{ - struct smb_sb_info *server = server_from_socket(sk->sk_socket); - void (*data_ready)(struct sock *, int) = server->data_ready; - - data_ready(sk, len); - VERBOSE("(%p, %d)\n", sk, len); - smbiod_wake_up(); -} - -int -smb_valid_socket(struct inode * inode) -{ - return (inode && S_ISSOCK(inode->i_mode) && - SOCKET_I(inode)->type == SOCK_STREAM); -} - -static struct socket * -server_sock(struct smb_sb_info *server) -{ - struct file *file; - - if (server && (file = server->sock_file)) - { -#ifdef SMBFS_PARANOIA - if (!smb_valid_socket(file->f_path.dentry->d_inode)) - PARANOIA("bad socket!\n"); -#endif - return SOCKET_I(file->f_path.dentry->d_inode); - } - return NULL; -} - -void -smb_close_socket(struct smb_sb_info *server) -{ - struct file * file = server->sock_file; - - if (file) { - struct socket *sock = server_sock(server); - - VERBOSE("closing socket %p\n", sock); - sock->sk->sk_data_ready = server->data_ready; - server->sock_file = NULL; - fput(file); - } -} - -static int -smb_get_length(struct socket *socket, unsigned char *header) -{ - int result; - - result = _recvfrom(socket, header, 4, MSG_PEEK); - if (result == -EAGAIN) - return -ENODATA; - if (result < 0) { - PARANOIA("recv error = %d\n", -result); - return result; - } - if (result < 4) - return -ENODATA; - - switch (header[0]) { - case 0x00: - case 0x82: - break; - - case 0x85: - DEBUG1("Got SESSION KEEP ALIVE\n"); - _recvfrom(socket, header, 4, 0); /* read away */ - return -ENODATA; - - default: - PARANOIA("Invalid NBT packet, code=%x\n", header[0]); - return -EIO; - } - - /* The length in the RFC NB header is the raw data length */ - return smb_len(header); -} - -int -smb_recv_available(struct smb_sb_info *server) -{ - mm_segment_t oldfs; - int avail, err; - struct socket *sock = server_sock(server); - - oldfs = get_fs(); - set_fs(get_ds()); - err = sock->ops->ioctl(sock, SIOCINQ, (unsigned long) &avail); - set_fs(oldfs); - return (err >= 0) ? avail : err; -} - -/* - * Adjust the kvec to move on 'n' bytes (from nfs/sunrpc) - */ -static int -smb_move_iov(struct kvec **data, size_t *num, struct kvec *vec, unsigned amount) -{ - struct kvec *iv = *data; - int i; - int len; - - /* - * Eat any sent kvecs - */ - while (iv->iov_len <= amount) { - amount -= iv->iov_len; - iv++; - (*num)--; - } - - /* - * And chew down the partial one - */ - vec[0].iov_len = iv->iov_len-amount; - vec[0].iov_base =((unsigned char *)iv->iov_base)+amount; - iv++; - - len = vec[0].iov_len; - - /* - * And copy any others - */ - for (i = 1; i < *num; i++) { - vec[i] = *iv++; - len += vec[i].iov_len; - } - - *data = vec; - return len; -} - -/* - * smb_receive_header - * Only called by the smbiod thread. - */ -int -smb_receive_header(struct smb_sb_info *server) -{ - struct socket *sock; - int result = 0; - unsigned char peek_buf[4]; - - result = -EIO; - sock = server_sock(server); - if (!sock) - goto out; - if (sock->sk->sk_state != TCP_ESTABLISHED) - goto out; - - if (!server->smb_read) { - result = smb_get_length(sock, peek_buf); - if (result < 0) { - if (result == -ENODATA) - result = 0; - goto out; - } - server->smb_len = result + 4; - - if (server->smb_len < SMB_HEADER_LEN) { - PARANOIA("short packet: %d\n", result); - server->rstate = SMB_RECV_DROP; - result = -EIO; - goto out; - } - if (server->smb_len > SMB_MAX_PACKET_SIZE) { - PARANOIA("long packet: %d\n", result); - server->rstate = SMB_RECV_DROP; - result = -EIO; - goto out; - } - } - - result = _recvfrom(sock, server->header + server->smb_read, - SMB_HEADER_LEN - server->smb_read, 0); - VERBOSE("_recvfrom: %d\n", result); - if (result < 0) { - VERBOSE("receive error: %d\n", result); - goto out; - } - server->smb_read += result; - - if (server->smb_read == SMB_HEADER_LEN) - server->rstate = SMB_RECV_HCOMPLETE; -out: - return result; -} - -static char drop_buffer[PAGE_SIZE]; - -/* - * smb_receive_drop - read and throw away the data - * Only called by the smbiod thread. - * - * FIXME: we are in the kernel, could we just tell the socket that we want - * to drop stuff from the buffer? - */ -int -smb_receive_drop(struct smb_sb_info *server) -{ - struct socket *sock; - unsigned int flags; - struct kvec iov; - struct msghdr msg; - int rlen = smb_len(server->header) - server->smb_read + 4; - int result = -EIO; - - if (rlen > PAGE_SIZE) - rlen = PAGE_SIZE; - - sock = server_sock(server); - if (!sock) - goto out; - if (sock->sk->sk_state != TCP_ESTABLISHED) - goto out; - - flags = MSG_DONTWAIT | MSG_NOSIGNAL; - iov.iov_base = drop_buffer; - iov.iov_len = PAGE_SIZE; - msg.msg_flags = flags; - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_control = NULL; - - result = kernel_recvmsg(sock, &msg, &iov, 1, rlen, flags); - - VERBOSE("read: %d\n", result); - if (result < 0) { - VERBOSE("receive error: %d\n", result); - goto out; - } - server->smb_read += result; - - if (server->smb_read >= server->smb_len) - server->rstate = SMB_RECV_END; - -out: - return result; -} - -/* - * smb_receive - * Only called by the smbiod thread. - */ -int -smb_receive(struct smb_sb_info *server, struct smb_request *req) -{ - struct socket *sock; - unsigned int flags; - struct kvec iov[4]; - struct kvec *p = req->rq_iov; - size_t num = req->rq_iovlen; - struct msghdr msg; - int rlen; - int result = -EIO; - - sock = server_sock(server); - if (!sock) - goto out; - if (sock->sk->sk_state != TCP_ESTABLISHED) - goto out; - - flags = MSG_DONTWAIT | MSG_NOSIGNAL; - msg.msg_flags = flags; - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_control = NULL; - - /* Dont repeat bytes and count available bufferspace */ - rlen = min_t(int, smb_move_iov(&p, &num, iov, req->rq_bytes_recvd), - (req->rq_rlen - req->rq_bytes_recvd)); - - result = kernel_recvmsg(sock, &msg, p, num, rlen, flags); - - VERBOSE("read: %d\n", result); - if (result < 0) { - VERBOSE("receive error: %d\n", result); - goto out; - } - req->rq_bytes_recvd += result; - server->smb_read += result; - -out: - return result; -} - -/* - * Try to send a SMB request. This may return after sending only parts of the - * request. SMB_REQ_TRANSMITTED will be set if a request was fully sent. - * - * Parts of this was taken from xprt_sendmsg from net/sunrpc/xprt.c - */ -int -smb_send_request(struct smb_request *req) -{ - struct smb_sb_info *server = req->rq_server; - struct socket *sock; - struct msghdr msg = {.msg_flags = MSG_NOSIGNAL | MSG_DONTWAIT}; - int slen = req->rq_slen - req->rq_bytes_sent; - int result = -EIO; - struct kvec iov[4]; - struct kvec *p = req->rq_iov; - size_t num = req->rq_iovlen; - - sock = server_sock(server); - if (!sock) - goto out; - if (sock->sk->sk_state != TCP_ESTABLISHED) - goto out; - - /* Dont repeat bytes */ - if (req->rq_bytes_sent) - smb_move_iov(&p, &num, iov, req->rq_bytes_sent); - - result = kernel_sendmsg(sock, &msg, p, num, slen); - - if (result >= 0) { - req->rq_bytes_sent += result; - if (req->rq_bytes_sent >= req->rq_slen) - req->rq_flags |= SMB_REQ_TRANSMITTED; - } -out: - return result; -} diff --git a/fs/smbfs/symlink.c b/fs/smbfs/symlink.c deleted file mode 100644 index 00b2909..0000000 --- a/fs/smbfs/symlink.c +++ /dev/null @@ -1,68 +0,0 @@ -/* - * symlink.c - * - * Copyright (C) 2002 by John Newbigin - * - * Please add a note about your changes to smbfs in the ChangeLog file. - */ - -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/fcntl.h> -#include <linux/stat.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/pagemap.h> -#include <linux/net.h> -#include <linux/namei.h> - -#include <asm/uaccess.h> -#include <asm/system.h> - -#include <linux/smbno.h> -#include <linux/smb_fs.h> - -#include "smb_debug.h" -#include "proto.h" - -int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname) -{ - DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry)); - - return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname); -} - -static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd) -{ - char *link = __getname(); - DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry)); - - if (!link) { - link = ERR_PTR(-ENOMEM); - } else { - int len = smb_proc_read_link(server_from_dentry(dentry), - dentry, link, PATH_MAX - 1); - if (len < 0) { - __putname(link); - link = ERR_PTR(len); - } else { - link[len] = 0; - } - } - nd_set_link(nd, link); - return NULL; -} - -static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p) -{ - char *s = nd_get_link(nd); - if (!IS_ERR(s)) - __putname(s); -} - -const struct inode_operations smb_link_inode_operations = -{ - .readlink = generic_readlink, - .follow_link = smb_follow_link, - .put_link = smb_put_link, -}; diff --git a/fs/splice.c b/fs/splice.c index 8f1dfae..ce2f025 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -1311,18 +1311,6 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe, struct pipe_inode_info *opipe, size_t len, unsigned int flags); -/* - * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same - * location, so checking ->i_pipe is not enough to verify that this is a - * pipe. - */ -static inline struct pipe_inode_info *pipe_info(struct inode *inode) -{ - if (S_ISFIFO(inode->i_mode)) - return inode->i_pipe; - - return NULL; -} /* * Determine where to splice to/from. @@ -1336,8 +1324,8 @@ static long do_splice(struct file *in, loff_t __user *off_in, loff_t offset, *off; long ret; - ipipe = pipe_info(in->f_path.dentry->d_inode); - opipe = pipe_info(out->f_path.dentry->d_inode); + ipipe = get_pipe_info(in); + opipe = get_pipe_info(out); if (ipipe && opipe) { if (off_in || off_out) @@ -1555,7 +1543,7 @@ static long vmsplice_to_user(struct file *file, const struct iovec __user *iov, int error; long ret; - pipe = pipe_info(file->f_path.dentry->d_inode); + pipe = get_pipe_info(file); if (!pipe) return -EBADF; @@ -1642,7 +1630,7 @@ static long vmsplice_to_pipe(struct file *file, const struct iovec __user *iov, }; long ret; - pipe = pipe_info(file->f_path.dentry->d_inode); + pipe = get_pipe_info(file); if (!pipe) return -EBADF; @@ -2022,8 +2010,8 @@ static int link_pipe(struct pipe_inode_info *ipipe, static long do_tee(struct file *in, struct file *out, size_t len, unsigned int flags) { - struct pipe_inode_info *ipipe = pipe_info(in->f_path.dentry->d_inode); - struct pipe_inode_info *opipe = pipe_info(out->f_path.dentry->d_inode); + struct pipe_inode_info *ipipe = get_pipe_info(in); + struct pipe_inode_info *opipe = get_pipe_info(out); int ret = -EINVAL; /* diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c index 07a4f11..20700b9 100644 --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -370,12 +370,10 @@ static void squashfs_put_super(struct super_block *sb) } -static int squashfs_get_sb(struct file_system_type *fs_type, int flags, - const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *squashfs_mount(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, squashfs_fill_super); } @@ -442,16 +440,23 @@ static struct inode *squashfs_alloc_inode(struct super_block *sb) } -static void squashfs_destroy_inode(struct inode *inode) +static void squashfs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(squashfs_inode_cachep, squashfs_i(inode)); } +static void squashfs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, squashfs_i_callback); +} + static struct file_system_type squashfs_fs_type = { .owner = THIS_MODULE, .name = "squashfs", - .get_sb = squashfs_get_sb, + .mount = squashfs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV }; diff --git a/fs/squashfs/xattr.c b/fs/squashfs/xattr.c index 652b854..3876c36 100644 --- a/fs/squashfs/xattr.c +++ b/fs/squashfs/xattr.c @@ -158,17 +158,18 @@ static int squashfs_xattr_get(struct inode *inode, int name_index, strncmp(target, name, name_size) == 0) { /* found xattr */ if (type & SQUASHFS_XATTR_VALUE_OOL) { - __le64 xattr; + __le64 xattr_val; + u64 xattr; /* val is a reference to the real location */ err = squashfs_read_metadata(sb, &val, &start, &offset, sizeof(val)); if (err < 0) goto failed; - err = squashfs_read_metadata(sb, &xattr, &start, - &offset, sizeof(xattr)); + err = squashfs_read_metadata(sb, &xattr_val, + &start, &offset, sizeof(xattr_val)); if (err < 0) goto failed; - xattr = le64_to_cpu(xattr); + xattr = le64_to_cpu(xattr_val); start = SQUASHFS_XATTR_BLK(xattr) + msblk->xattr_table; offset = SQUASHFS_XATTR_OFFSET(xattr); diff --git a/fs/squashfs/xattr.h b/fs/squashfs/xattr.h index 49fe0d7..b634efc 100644 --- a/fs/squashfs/xattr.h +++ b/fs/squashfs/xattr.h @@ -25,7 +25,7 @@ extern __le64 *squashfs_read_xattr_id_table(struct super_block *, u64, u64 *, int *); extern int squashfs_xattr_lookup(struct super_block *, unsigned int, int *, - int *, unsigned long long *); + unsigned int *, unsigned long long *); #else static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb, u64 start, u64 *xattr_table_start, int *xattr_ids) @@ -35,7 +35,7 @@ static inline __le64 *squashfs_read_xattr_id_table(struct super_block *sb, } static inline int squashfs_xattr_lookup(struct super_block *sb, - unsigned int index, int *count, int *size, + unsigned int index, int *count, unsigned int *size, unsigned long long *xattr) { return 0; diff --git a/fs/squashfs/xattr_id.c b/fs/squashfs/xattr_id.c index cfb4110..d33be5d 100644 --- a/fs/squashfs/xattr_id.c +++ b/fs/squashfs/xattr_id.c @@ -34,6 +34,7 @@ #include "squashfs_fs_sb.h" #include "squashfs_fs_i.h" #include "squashfs.h" +#include "xattr.h" /* * Map xattr id using the xattr id look up table @@ -30,6 +30,7 @@ #include <linux/idr.h> #include <linux/mutex.h> #include <linux/backing-dev.h> +#include <linux/rculist_bl.h> #include "internal.h" @@ -71,7 +72,7 @@ static struct super_block *alloc_super(struct file_system_type *type) INIT_LIST_HEAD(&s->s_files); #endif INIT_LIST_HEAD(&s->s_instances); - INIT_HLIST_HEAD(&s->s_anon); + INIT_HLIST_BL_HEAD(&s->s_anon); INIT_LIST_HEAD(&s->s_inodes); INIT_LIST_HEAD(&s->s_dentry_lru); init_rwsem(&s->s_umount); @@ -715,15 +716,14 @@ static int ns_set_super(struct super_block *sb, void *data) return set_anon_super(sb, NULL); } -int get_sb_ns(struct file_system_type *fs_type, int flags, void *data, - int (*fill_super)(struct super_block *, void *, int), - struct vfsmount *mnt) +struct dentry *mount_ns(struct file_system_type *fs_type, int flags, + void *data, int (*fill_super)(struct super_block *, void *, int)) { struct super_block *sb; sb = sget(fs_type, ns_test_super, ns_set_super, data); if (IS_ERR(sb)) - return PTR_ERR(sb); + return ERR_CAST(sb); if (!sb->s_root) { int err; @@ -731,17 +731,16 @@ int get_sb_ns(struct file_system_type *fs_type, int flags, void *data, err = fill_super(sb, data, flags & MS_SILENT ? 1 : 0); if (err) { deactivate_locked_super(sb); - return err; + return ERR_PTR(err); } sb->s_flags |= MS_ACTIVE; } - simple_set_mnt(mnt, sb); - return 0; + return dget(sb->s_root); } -EXPORT_SYMBOL(get_sb_ns); +EXPORT_SYMBOL(mount_ns); #ifdef CONFIG_BLOCK static int set_bdev_super(struct super_block *s, void *data) @@ -762,10 +761,9 @@ static int test_bdev_super(struct super_block *s, void *data) return (void *)s->s_bdev == data; } -int get_sb_bdev(struct file_system_type *fs_type, +struct dentry *mount_bdev(struct file_system_type *fs_type, int flags, const char *dev_name, void *data, - int (*fill_super)(struct super_block *, void *, int), - struct vfsmount *mnt) + int (*fill_super)(struct super_block *, void *, int)) { struct block_device *bdev; struct super_block *s; @@ -777,7 +775,7 @@ int get_sb_bdev(struct file_system_type *fs_type, bdev = open_bdev_exclusive(dev_name, mode, fs_type); if (IS_ERR(bdev)) - return PTR_ERR(bdev); + return ERR_CAST(bdev); /* * once the super is inserted into the list by sget, s_umount @@ -829,15 +827,30 @@ int get_sb_bdev(struct file_system_type *fs_type, bdev->bd_super = s; } - simple_set_mnt(mnt, s); - return 0; + return dget(s->s_root); error_s: error = PTR_ERR(s); error_bdev: close_bdev_exclusive(bdev, mode); error: - return error; + return ERR_PTR(error); +} +EXPORT_SYMBOL(mount_bdev); + +int get_sb_bdev(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data, + int (*fill_super)(struct super_block *, void *, int), + struct vfsmount *mnt) +{ + struct dentry *root; + + root = mount_bdev(fs_type, flags, dev_name, data, fill_super); + if (IS_ERR(root)) + return PTR_ERR(root); + mnt->mnt_root = root; + mnt->mnt_sb = root->d_sb; + return 0; } EXPORT_SYMBOL(get_sb_bdev); @@ -856,29 +869,42 @@ void kill_block_super(struct super_block *sb) EXPORT_SYMBOL(kill_block_super); #endif -int get_sb_nodev(struct file_system_type *fs_type, +struct dentry *mount_nodev(struct file_system_type *fs_type, int flags, void *data, - int (*fill_super)(struct super_block *, void *, int), - struct vfsmount *mnt) + int (*fill_super)(struct super_block *, void *, int)) { int error; struct super_block *s = sget(fs_type, NULL, set_anon_super, NULL); if (IS_ERR(s)) - return PTR_ERR(s); + return ERR_CAST(s); s->s_flags = flags; error = fill_super(s, data, flags & MS_SILENT ? 1 : 0); if (error) { deactivate_locked_super(s); - return error; + return ERR_PTR(error); } s->s_flags |= MS_ACTIVE; - simple_set_mnt(mnt, s); - return 0; + return dget(s->s_root); } +EXPORT_SYMBOL(mount_nodev); +int get_sb_nodev(struct file_system_type *fs_type, + int flags, void *data, + int (*fill_super)(struct super_block *, void *, int), + struct vfsmount *mnt) +{ + struct dentry *root; + + root = mount_nodev(fs_type, flags, data, fill_super); + if (IS_ERR(root)) + return PTR_ERR(root); + mnt->mnt_root = root; + mnt->mnt_sb = root->d_sb; + return 0; +} EXPORT_SYMBOL(get_sb_nodev); static int compare_single(struct super_block *s, void *p) @@ -886,29 +912,42 @@ static int compare_single(struct super_block *s, void *p) return 1; } -int get_sb_single(struct file_system_type *fs_type, +struct dentry *mount_single(struct file_system_type *fs_type, int flags, void *data, - int (*fill_super)(struct super_block *, void *, int), - struct vfsmount *mnt) + int (*fill_super)(struct super_block *, void *, int)) { struct super_block *s; int error; s = sget(fs_type, compare_single, set_anon_super, NULL); if (IS_ERR(s)) - return PTR_ERR(s); + return ERR_CAST(s); if (!s->s_root) { s->s_flags = flags; error = fill_super(s, data, flags & MS_SILENT ? 1 : 0); if (error) { deactivate_locked_super(s); - return error; + return ERR_PTR(error); } s->s_flags |= MS_ACTIVE; } else { do_remount_sb(s, flags, data, 0); } - simple_set_mnt(mnt, s); + return dget(s->s_root); +} +EXPORT_SYMBOL(mount_single); + +int get_sb_single(struct file_system_type *fs_type, + int flags, void *data, + int (*fill_super)(struct super_block *, void *, int), + struct vfsmount *mnt) +{ + struct dentry *root; + root = mount_single(fs_type, flags, data, fill_super); + if (IS_ERR(root)) + return PTR_ERR(root); + mnt->mnt_root = root; + mnt->mnt_sb = root->d_sb; return 0; } @@ -918,6 +957,7 @@ struct vfsmount * vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void *data) { struct vfsmount *mnt; + struct dentry *root; char *secdata = NULL; int error; @@ -942,9 +982,19 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void goto out_free_secdata; } - error = type->get_sb(type, flags, name, data, mnt); - if (error < 0) - goto out_free_secdata; + if (type->mount) { + root = type->mount(type, flags, name, data); + if (IS_ERR(root)) { + error = PTR_ERR(root); + goto out_free_secdata; + } + mnt->mnt_root = root; + mnt->mnt_sb = root->d_sb; + } else { + error = type->get_sb(type, flags, name, data, mnt); + if (error < 0) + goto out_free_secdata; + } BUG_ON(!mnt->mnt_sb); WARN_ON(!mnt->mnt_sb->s_bdi); mnt->mnt_sb->s_flags |= MS_BORN; @@ -1090,7 +1140,7 @@ static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype) return mnt; err: - mntput(mnt); + mntput_long(mnt); return ERR_PTR(err); } diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 7e54bac..ea9120a 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -231,7 +231,7 @@ void release_sysfs_dirent(struct sysfs_dirent * sd) goto repeat; } -static int sysfs_dentry_delete(struct dentry *dentry) +static int sysfs_dentry_delete(const struct dentry *dentry) { struct sysfs_dirent *sd = dentry->d_fsdata; return !!(sd->s_flags & SYSFS_FLAG_REMOVED); @@ -239,9 +239,13 @@ static int sysfs_dentry_delete(struct dentry *dentry) static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd) { - struct sysfs_dirent *sd = dentry->d_fsdata; + struct sysfs_dirent *sd; int is_dir; + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + sd = dentry->d_fsdata; mutex_lock(&sysfs_mutex); /* The sysfs dirent has been deleted */ @@ -701,7 +705,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry, /* instantiate and hash dentry */ ret = d_find_alias(inode); if (!ret) { - dentry->d_op = &sysfs_dentry_ops; + d_set_d_op(dentry, &sysfs_dentry_ops); dentry->d_fsdata = sysfs_get(sd); d_add(dentry, inode); } else { diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c index 442f34f..c8769dc2 100644 --- a/fs/sysfs/group.c +++ b/fs/sysfs/group.c @@ -165,10 +165,7 @@ int sysfs_merge_group(struct kobject *kobj, struct attribute *const *attr; int i; - if (grp) - dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name); - else - dir_sd = sysfs_get(kobj->sd); + dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name); if (!dir_sd) return -ENOENT; @@ -195,10 +192,7 @@ void sysfs_unmerge_group(struct kobject *kobj, struct sysfs_dirent *dir_sd; struct attribute *const *attr; - if (grp) - dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name); - else - dir_sd = sysfs_get(kobj->sd); + dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name); if (dir_sd) { for (attr = grp->attrs; *attr; ++attr) sysfs_hash_and_remove(dir_sd, NULL, (*attr)->name); diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index cffb1fd..0a12eb8 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -19,6 +19,7 @@ #include <linux/errno.h> #include <linux/sched.h> #include <linux/slab.h> +#include <linux/sysfs.h> #include <linux/xattr.h> #include <linux/security.h> #include "sysfs.h" @@ -348,13 +349,18 @@ int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const cha return -ENOENT; } -int sysfs_permission(struct inode *inode, int mask) +int sysfs_permission(struct inode *inode, int mask, unsigned int flags) { - struct sysfs_dirent *sd = inode->i_private; + struct sysfs_dirent *sd; + + if (flags & IPERM_FLAG_RCU) + return -ECHILD; + + sd = inode->i_private; mutex_lock(&sysfs_mutex); sysfs_refresh_inode(sd, inode); mutex_unlock(&sysfs_mutex); - return generic_permission(inode, mask, NULL); + return generic_permission(inode, mask, flags, NULL); } diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c index f2af225..2668957 100644 --- a/fs/sysfs/mount.c +++ b/fs/sysfs/mount.c @@ -23,7 +23,7 @@ #include "sysfs.h" -static struct vfsmount *sysfs_mount; +static struct vfsmount *sysfs_mnt; struct kmem_cache *sysfs_dir_cachep; static const struct super_operations sysfs_ops = { @@ -95,18 +95,17 @@ static int sysfs_set_super(struct super_block *sb, void *data) return error; } -static int sysfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *sysfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { struct sysfs_super_info *info; enum kobj_ns_type type; struct super_block *sb; int error; - error = -ENOMEM; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) - goto out; + return ERR_PTR(-ENOMEM); for (type = KOBJ_NS_TYPE_NONE; type < KOBJ_NS_TYPES; type++) info->ns[type] = kobj_ns_current(type); @@ -114,24 +113,19 @@ static int sysfs_get_sb(struct file_system_type *fs_type, sb = sget(fs_type, sysfs_test_super, sysfs_set_super, info); if (IS_ERR(sb) || sb->s_fs_info != info) kfree(info); - if (IS_ERR(sb)) { - error = PTR_ERR(sb); - goto out; - } + if (IS_ERR(sb)) + return ERR_CAST(sb); if (!sb->s_root) { sb->s_flags = flags; error = sysfs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0); if (error) { deactivate_locked_super(sb); - goto out; + return ERR_PTR(error); } sb->s_flags |= MS_ACTIVE; } - simple_set_mnt(mnt, sb); - error = 0; -out: - return error; + return dget(sb->s_root); } static void sysfs_kill_sb(struct super_block *sb) @@ -147,7 +141,7 @@ static void sysfs_kill_sb(struct super_block *sb) static struct file_system_type sysfs_fs_type = { .name = "sysfs", - .get_sb = sysfs_get_sb, + .mount = sysfs_mount, .kill_sb = sysfs_kill_sb, }; @@ -189,11 +183,11 @@ int __init sysfs_init(void) err = register_filesystem(&sysfs_fs_type); if (!err) { - sysfs_mount = kern_mount(&sysfs_fs_type); - if (IS_ERR(sysfs_mount)) { + sysfs_mnt = kern_mount(&sysfs_fs_type); + if (IS_ERR(sysfs_mnt)) { printk(KERN_ERR "sysfs: could not mount!\n"); - err = PTR_ERR(sysfs_mount); - sysfs_mount = NULL; + err = PTR_ERR(sysfs_mnt); + sysfs_mnt = NULL; unregister_filesystem(&sysfs_fs_type); goto out_err; } diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index d9be60a..3d28af31 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -9,6 +9,7 @@ */ #include <linux/lockdep.h> +#include <linux/kobject_ns.h> #include <linux/fs.h> struct sysfs_open_dirent; @@ -200,7 +201,7 @@ static inline void __sysfs_put(struct sysfs_dirent *sd) struct inode *sysfs_get_inode(struct super_block *sb, struct sysfs_dirent *sd); void sysfs_evict_inode(struct inode *inode); int sysfs_sd_setattr(struct sysfs_dirent *sd, struct iattr *iattr); -int sysfs_permission(struct inode *inode, int mask); +int sysfs_permission(struct inode *inode, int mask, unsigned int flags); int sysfs_setattr(struct dentry *dentry, struct iattr *iattr); int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat); int sysfs_setxattr(struct dentry *dentry, const char *name, const void *value, diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c index de44d06..0630eb96 100644 --- a/fs/sysv/inode.c +++ b/fs/sysv/inode.c @@ -333,11 +333,18 @@ static struct inode *sysv_alloc_inode(struct super_block *sb) return &si->vfs_inode; } -static void sysv_destroy_inode(struct inode *inode) +static void sysv_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(sysv_inode_cachep, SYSV_I(inode)); } +static void sysv_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, sysv_i_callback); +} + static void init_once(void *p) { struct sysv_inode_info *si = (struct sysv_inode_info *)p; diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c index 11e7f7d..b5e68da 100644 --- a/fs/sysv/namei.c +++ b/fs/sysv/namei.c @@ -27,7 +27,8 @@ static int add_nondir(struct dentry *dentry, struct inode *inode) return err; } -static int sysv_hash(struct dentry *dentry, struct qstr *qstr) +static int sysv_hash(const struct dentry *dentry, const struct inode *inode, + struct qstr *qstr) { /* Truncate the name in place, avoids having to define a compare function. */ @@ -47,7 +48,7 @@ static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, st struct inode * inode = NULL; ino_t ino; - dentry->d_op = dir->i_sb->s_root->d_op; + d_set_d_op(dentry, dir->i_sb->s_root->d_op); if (dentry->d_name.len > SYSV_NAMELEN) return ERR_PTR(-ENAMETOOLONG); ino = sysv_inode_by_name(dentry); diff --git a/fs/sysv/super.c b/fs/sysv/super.c index a0b0cda..76712ae 100644 --- a/fs/sysv/super.c +++ b/fs/sysv/super.c @@ -346,7 +346,7 @@ static int complete_read_super(struct super_block *sb, int silent, int size) if (sbi->s_forced_ro) sb->s_flags |= MS_RDONLY; if (sbi->s_truncate) - sb->s_root->d_op = &sysv_dentry_operations; + d_set_d_op(sb->s_root, &sysv_dentry_operations); return 1; } @@ -526,23 +526,22 @@ failed: /* Every kernel module contains stuff like this. */ -static int sysv_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *sysv_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, sysv_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, sysv_fill_super); } -static int v7_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *v7_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, v7_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, v7_fill_super); } static struct file_system_type sysv_fs_type = { .owner = THIS_MODULE, .name = "sysv", - .get_sb = sysv_get_sb, + .mount = sysv_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -550,7 +549,7 @@ static struct file_system_type sysv_fs_type = { static struct file_system_type v7_fs_type = { .owner = THIS_MODULE, .name = "v7", - .get_sb = v7_get_sb, + .mount = v7_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 9a47c9f..6e11c29 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -272,12 +272,20 @@ static struct inode *ubifs_alloc_inode(struct super_block *sb) return &ui->vfs_inode; }; +static void ubifs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct ubifs_inode *ui = ubifs_inode(inode); + INIT_LIST_HEAD(&inode->i_dentry); + kmem_cache_free(ubifs_inode_slab, ui); +} + static void ubifs_destroy_inode(struct inode *inode) { struct ubifs_inode *ui = ubifs_inode(inode); kfree(ui->data); - kmem_cache_free(ubifs_inode_slab, inode); + call_rcu(&inode->i_rcu, ubifs_i_callback); } /* @@ -2038,8 +2046,8 @@ static int sb_test(struct super_block *sb, void *data) return c->vi.cdev == *dev; } -static int ubifs_get_sb(struct file_system_type *fs_type, int flags, - const char *name, void *data, struct vfsmount *mnt) +static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags, + const char *name, void *data) { struct ubi_volume_desc *ubi; struct ubi_volume_info vi; @@ -2057,7 +2065,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags, if (IS_ERR(ubi)) { dbg_err("cannot open \"%s\", error %d", name, (int)PTR_ERR(ubi)); - return PTR_ERR(ubi); + return ERR_CAST(ubi); } ubi_get_volume_info(ubi, &vi); @@ -2095,20 +2103,19 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags, /* 'fill_super()' opens ubi again so we must close it here */ ubi_close_volume(ubi); - simple_set_mnt(mnt, sb); - return 0; + return dget(sb->s_root); out_deact: deactivate_locked_super(sb); out_close: ubi_close_volume(ubi); - return err; + return ERR_PTR(err); } static struct file_system_type ubifs_fs_type = { .name = "ubifs", .owner = THIS_MODULE, - .get_sb = ubifs_get_sb, + .mount = ubifs_mount, .kill_sb = kill_anon_super, }; diff --git a/fs/udf/Kconfig b/fs/udf/Kconfig index f8def3c..0e0e99b 100644 --- a/fs/udf/Kconfig +++ b/fs/udf/Kconfig @@ -1,6 +1,5 @@ config UDF_FS tristate "UDF file system support" - depends on BKL # needs serious work to remove select CRC_ITU_T help This is the new file system used on some CD-ROMs and DVDs. Say Y if diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c index b608efa..306ee39 100644 --- a/fs/udf/balloc.c +++ b/fs/udf/balloc.c @@ -157,10 +157,9 @@ static void udf_bitmap_free_blocks(struct super_block *sb, udf_debug("bit %ld already set\n", bit + i); udf_debug("byte=%2x\n", ((char *)bh->b_data)[(bit + i) >> 3]); - } else { - udf_add_free_space(sb, sbi->s_partition, 1); } } + udf_add_free_space(sb, sbi->s_partition, count); mark_buffer_dirty(bh); if (overflow) { block += count; diff --git a/fs/udf/dir.c b/fs/udf/dir.c index 51552bf..eb8bfe2 100644 --- a/fs/udf/dir.c +++ b/fs/udf/dir.c @@ -30,7 +30,6 @@ #include <linux/errno.h> #include <linux/mm.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include "udf_i.h" @@ -190,18 +189,14 @@ static int udf_readdir(struct file *filp, void *dirent, filldir_t filldir) struct inode *dir = filp->f_path.dentry->d_inode; int result; - lock_kernel(); - if (filp->f_pos == 0) { if (filldir(dirent, ".", 1, filp->f_pos, dir->i_ino, DT_DIR) < 0) { - unlock_kernel(); return 0; } filp->f_pos++; } result = do_udf_readdir(dir, filp, filldir, dirent); - unlock_kernel(); return result; } diff --git a/fs/udf/file.c b/fs/udf/file.c index 66b9e7e..89c7848 100644 --- a/fs/udf/file.c +++ b/fs/udf/file.c @@ -32,7 +32,6 @@ #include <linux/string.h> /* memset */ #include <linux/capability.h> #include <linux/errno.h> -#include <linux/smp_lock.h> #include <linux/pagemap.h> #include <linux/buffer_head.h> #include <linux/aio.h> @@ -114,6 +113,7 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov, size_t count = iocb->ki_left; struct udf_inode_info *iinfo = UDF_I(inode); + down_write(&iinfo->i_data_sem); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { if (file->f_flags & O_APPEND) pos = inode->i_size; @@ -126,6 +126,7 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov, udf_expand_file_adinicb(inode, pos + count, &err); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { udf_debug("udf_expand_adinicb: err=%d\n", err); + up_write(&iinfo->i_data_sem); return err; } } else { @@ -135,6 +136,7 @@ static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov, iinfo->i_lenAlloc = inode->i_size; } } + up_write(&iinfo->i_data_sem); retval = generic_file_aio_write(iocb, iov, nr_segs, ppos); if (retval > 0) @@ -149,8 +151,6 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) long old_block, new_block; int result = -EINVAL; - lock_kernel(); - if (file_permission(filp, MAY_READ) != 0) { udf_debug("no permission to access inode %lu\n", inode->i_ino); result = -EPERM; @@ -196,7 +196,6 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } out: - unlock_kernel(); return result; } @@ -204,10 +203,10 @@ static int udf_release_file(struct inode *inode, struct file *filp) { if (filp->f_mode & FMODE_WRITE) { mutex_lock(&inode->i_mutex); - lock_kernel(); + down_write(&UDF_I(inode)->i_data_sem); udf_discard_prealloc(inode); udf_truncate_tail_extent(inode); - unlock_kernel(); + up_write(&UDF_I(inode)->i_data_sem); mutex_unlock(&inode->i_mutex); } return 0; diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c index 75d9304..6fb7e0a 100644 --- a/fs/udf/ialloc.c +++ b/fs/udf/ialloc.c @@ -92,28 +92,19 @@ struct inode *udf_new_inode(struct inode *dir, int mode, int *err) return NULL; } - mutex_lock(&sbi->s_alloc_mutex); if (sbi->s_lvid_bh) { - struct logicalVolIntegrityDesc *lvid = - (struct logicalVolIntegrityDesc *) - sbi->s_lvid_bh->b_data; - struct logicalVolIntegrityDescImpUse *lvidiu = - udf_sb_lvidiu(sbi); - struct logicalVolHeaderDesc *lvhd; - uint64_t uniqueID; - lvhd = (struct logicalVolHeaderDesc *) - (lvid->logicalVolContentsUse); + struct logicalVolIntegrityDescImpUse *lvidiu; + + iinfo->i_unique = lvid_get_unique_id(sb); + mutex_lock(&sbi->s_alloc_mutex); + lvidiu = udf_sb_lvidiu(sbi); if (S_ISDIR(mode)) le32_add_cpu(&lvidiu->numDirs, 1); else le32_add_cpu(&lvidiu->numFiles, 1); - iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID); - if (!(++uniqueID & 0x00000000FFFFFFFFUL)) - uniqueID += 16; - lvhd->uniqueID = cpu_to_le64(uniqueID); udf_updated_lvid(sb); + mutex_unlock(&sbi->s_alloc_mutex); } - mutex_unlock(&sbi->s_alloc_mutex); inode_init_owner(inode, dir, mode); diff --git a/fs/udf/inode.c b/fs/udf/inode.c index fc48f37..c6a2e78 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -31,7 +31,6 @@ #include "udfdecl.h" #include <linux/mm.h> -#include <linux/smp_lock.h> #include <linux/module.h> #include <linux/pagemap.h> #include <linux/buffer_head.h> @@ -51,6 +50,7 @@ MODULE_LICENSE("GPL"); static mode_t udf_convert_permissions(struct fileEntry *); static int udf_update_inode(struct inode *, int); static void udf_fill_inode(struct inode *, struct buffer_head *); +static int udf_sync_inode(struct inode *inode); static int udf_alloc_i_data(struct inode *inode, size_t size); static struct buffer_head *inode_getblk(struct inode *, sector_t, int *, sector_t *, int *); @@ -79,9 +79,7 @@ void udf_evict_inode(struct inode *inode) want_delete = 1; inode->i_size = 0; udf_truncate(inode); - lock_kernel(); udf_update_inode(inode, IS_SYNC(inode)); - unlock_kernel(); } invalidate_inode_buffers(inode); end_writeback(inode); @@ -97,9 +95,7 @@ void udf_evict_inode(struct inode *inode) kfree(iinfo->i_ext.i_data); iinfo->i_ext.i_data = NULL; if (want_delete) { - lock_kernel(); udf_free_inode(inode); - unlock_kernel(); } } @@ -302,10 +298,9 @@ static int udf_get_block(struct inode *inode, sector_t block, err = -EIO; new = 0; bh = NULL; - - lock_kernel(); - iinfo = UDF_I(inode); + + down_write(&iinfo->i_data_sem); if (block == iinfo->i_next_alloc_block + 1) { iinfo->i_next_alloc_block++; iinfo->i_next_alloc_goal++; @@ -324,7 +319,7 @@ static int udf_get_block(struct inode *inode, sector_t block, map_bh(bh_result, inode->i_sb, phys); abort: - unlock_kernel(); + up_write(&iinfo->i_data_sem); return err; } @@ -1022,16 +1017,16 @@ void udf_truncate(struct inode *inode) if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) return; - lock_kernel(); iinfo = UDF_I(inode); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { + down_write(&iinfo->i_data_sem); if (inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) + inode->i_size)) { udf_expand_file_adinicb(inode, inode->i_size, &err); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { inode->i_size = iinfo->i_lenAlloc; - unlock_kernel(); + up_write(&iinfo->i_data_sem); return; } else udf_truncate_extents(inode); @@ -1042,10 +1037,13 @@ void udf_truncate(struct inode *inode) offset - udf_file_entry_alloc_offset(inode)); iinfo->i_lenAlloc = inode->i_size; } + up_write(&iinfo->i_data_sem); } else { block_truncate_page(inode->i_mapping, inode->i_size, udf_get_block); + down_write(&iinfo->i_data_sem); udf_truncate_extents(inode); + up_write(&iinfo->i_data_sem); } inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); @@ -1053,7 +1051,6 @@ void udf_truncate(struct inode *inode) udf_sync_inode(inode); else mark_inode_dirty(inode); - unlock_kernel(); } static void __udf_read_inode(struct inode *inode) @@ -1202,6 +1199,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) return; } + read_lock(&sbi->s_cred_lock); inode->i_uid = le32_to_cpu(fe->uid); if (inode->i_uid == -1 || UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) || @@ -1214,13 +1212,6 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET)) inode->i_gid = UDF_SB(inode->i_sb)->s_gid; - inode->i_nlink = le16_to_cpu(fe->fileLinkCount); - if (!inode->i_nlink) - inode->i_nlink = 1; - - inode->i_size = le64_to_cpu(fe->informationLength); - iinfo->i_lenExtents = inode->i_size; - if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY && sbi->s_fmode != UDF_INVALID_MODE) inode->i_mode = sbi->s_fmode; @@ -1230,6 +1221,14 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh) else inode->i_mode = udf_convert_permissions(fe); inode->i_mode &= ~sbi->s_umask; + read_unlock(&sbi->s_cred_lock); + + inode->i_nlink = le16_to_cpu(fe->fileLinkCount); + if (!inode->i_nlink) + inode->i_nlink = 1; + + inode->i_size = le64_to_cpu(fe->informationLength); + iinfo->i_lenExtents = inode->i_size; if (iinfo->i_efe == 0) { inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) << @@ -1373,16 +1372,10 @@ static mode_t udf_convert_permissions(struct fileEntry *fe) int udf_write_inode(struct inode *inode, struct writeback_control *wbc) { - int ret; - - lock_kernel(); - ret = udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); - unlock_kernel(); - - return ret; + return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL); } -int udf_sync_inode(struct inode *inode) +static int udf_sync_inode(struct inode *inode) { return udf_update_inode(inode, 1); } @@ -2048,7 +2041,7 @@ long udf_block_map(struct inode *inode, sector_t block) struct extent_position epos = {}; int ret; - lock_kernel(); + down_read(&UDF_I(inode)->i_data_sem); if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) == (EXT_RECORDED_ALLOCATED >> 30)) @@ -2056,7 +2049,7 @@ long udf_block_map(struct inode *inode, sector_t block) else ret = 0; - unlock_kernel(); + up_read(&UDF_I(inode)->i_data_sem); brelse(epos.bh); if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV)) diff --git a/fs/udf/namei.c b/fs/udf/namei.c index 6d8dc02..2be0f9e 100644 --- a/fs/udf/namei.c +++ b/fs/udf/namei.c @@ -27,7 +27,6 @@ #include <linux/errno.h> #include <linux/mm.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include <linux/sched.h> #include <linux/crc-itu-t.h> @@ -228,10 +227,8 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir, } if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) && - isdotdot) { - brelse(epos.bh); - return fi; - } + isdotdot) + goto out_ok; if (!lfi) continue; @@ -263,7 +260,6 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, if (dentry->d_name.len > UDF_NAME_LEN - 2) return ERR_PTR(-ENAMETOOLONG); - lock_kernel(); #ifdef UDF_RECOVERY /* temporary shorthand for specifying files by inode number */ if (!strncmp(dentry->d_name.name, ".B=", 3)) { @@ -275,7 +271,6 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, }; inode = udf_iget(dir->i_sb, lb); if (!inode) { - unlock_kernel(); return ERR_PTR(-EACCES); } } else @@ -291,11 +286,9 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry, loc = lelb_to_cpu(cfi.icb.extLocation); inode = udf_iget(dir->i_sb, &loc); if (!inode) { - unlock_kernel(); return ERR_PTR(-EACCES); } } - unlock_kernel(); return d_splice_alias(inode, dentry); } @@ -476,15 +469,19 @@ add: f_pos >> dir->i_sb->s_blocksize_bits, 1, err); if (!fibh->ebh) goto out_err; + /* Extents could have been merged, invalidate our position */ + brelse(epos.bh); + epos.bh = NULL; + epos.block = dinfo->i_location; + epos.offset = udf_file_entry_alloc_offset(dir); if (!fibh->soffset) { - if (udf_next_aext(dir, &epos, &eloc, &elen, 1) == - (EXT_RECORDED_ALLOCATED >> 30)) { - block = eloc.logicalBlockNum + ((elen - 1) >> + /* Find the freshly allocated block */ + while (udf_next_aext(dir, &epos, &eloc, &elen, 1) == + (EXT_RECORDED_ALLOCATED >> 30)) + ; + block = eloc.logicalBlockNum + ((elen - 1) >> dir->i_sb->s_blocksize_bits); - } else - block++; - brelse(fibh->sbh); fibh->sbh = fibh->ebh; fi = (struct fileIdentDesc *)(fibh->sbh->b_data); @@ -562,10 +559,8 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode, int err; struct udf_inode_info *iinfo; - lock_kernel(); inode = udf_new_inode(dir, mode, &err); if (!inode) { - unlock_kernel(); return err; } @@ -583,7 +578,6 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode, inode->i_nlink--; mark_inode_dirty(inode); iput(inode); - unlock_kernel(); return err; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); @@ -596,7 +590,6 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode, if (fibh.sbh != fibh.ebh) brelse(fibh.ebh); brelse(fibh.sbh); - unlock_kernel(); d_instantiate(dentry, inode); return 0; @@ -614,7 +607,6 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, if (!old_valid_dev(rdev)) return -EINVAL; - lock_kernel(); err = -EIO; inode = udf_new_inode(dir, mode, &err); if (!inode) @@ -627,7 +619,6 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, inode->i_nlink--; mark_inode_dirty(inode); iput(inode); - unlock_kernel(); return err; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); @@ -646,7 +637,6 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode, err = 0; out: - unlock_kernel(); return err; } @@ -659,7 +649,6 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) struct udf_inode_info *dinfo = UDF_I(dir); struct udf_inode_info *iinfo; - lock_kernel(); err = -EMLINK; if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1) goto out; @@ -712,7 +701,6 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode) err = 0; out: - unlock_kernel(); return err; } @@ -794,7 +782,6 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry) struct kernel_lb_addr tloc; retval = -ENOENT; - lock_kernel(); fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); if (!fi) goto out; @@ -826,7 +813,6 @@ end_rmdir: brelse(fibh.sbh); out: - unlock_kernel(); return retval; } @@ -840,7 +826,6 @@ static int udf_unlink(struct inode *dir, struct dentry *dentry) struct kernel_lb_addr tloc; retval = -ENOENT; - lock_kernel(); fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi); if (!fi) goto out; @@ -870,7 +855,6 @@ end_unlink: brelse(fibh.sbh); out: - unlock_kernel(); return retval; } @@ -890,21 +874,21 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, int block; unsigned char *name = NULL; int namelen; - struct buffer_head *bh; struct udf_inode_info *iinfo; + struct super_block *sb = dir->i_sb; - lock_kernel(); inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err); if (!inode) goto out; + iinfo = UDF_I(inode); + down_write(&iinfo->i_data_sem); name = kmalloc(UDF_NAME_LEN, GFP_NOFS); if (!name) { err = -ENOMEM; goto out_no_entry; } - iinfo = UDF_I(inode); inode->i_data.a_ops = &udf_symlink_aops; inode->i_op = &udf_symlink_inode_operations; @@ -912,7 +896,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, struct kernel_lb_addr eloc; uint32_t bsize; - block = udf_new_block(inode->i_sb, inode, + block = udf_new_block(sb, inode, iinfo->i_location.partitionReferenceNum, iinfo->i_location.logicalBlockNum, &err); if (!block) @@ -923,17 +907,17 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, eloc.logicalBlockNum = block; eloc.partitionReferenceNum = iinfo->i_location.partitionReferenceNum; - bsize = inode->i_sb->s_blocksize; + bsize = sb->s_blocksize; iinfo->i_lenExtents = bsize; udf_add_aext(inode, &epos, &eloc, bsize, 0); brelse(epos.bh); - block = udf_get_pblock(inode->i_sb, block, + block = udf_get_pblock(sb, block, iinfo->i_location.partitionReferenceNum, 0); - epos.bh = udf_tgetblk(inode->i_sb, block); + epos.bh = udf_tgetblk(sb, block); lock_buffer(epos.bh); - memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize); + memset(epos.bh->b_data, 0x00, bsize); set_buffer_uptodate(epos.bh); unlock_buffer(epos.bh); mark_buffer_dirty_inode(epos.bh, inode); @@ -941,7 +925,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, } else ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr; - eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode); + eoffset = sb->s_blocksize - udf_ext0_offset(inode); pc = (struct pathComponent *)ea; if (*symname == '/') { @@ -981,7 +965,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, } if (pc->componentType == 5) { - namelen = udf_put_filename(inode->i_sb, compstart, name, + namelen = udf_put_filename(sb, compstart, name, symname - compstart); if (!namelen) goto out_no_entry; @@ -1015,27 +999,16 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); if (!fi) goto out_no_entry; - cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); + cfi.icb.extLength = cpu_to_le32(sb->s_blocksize); cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location); - bh = UDF_SB(inode->i_sb)->s_lvid_bh; - if (bh) { - struct logicalVolIntegrityDesc *lvid = - (struct logicalVolIntegrityDesc *)bh->b_data; - struct logicalVolHeaderDesc *lvhd; - uint64_t uniqueID; - lvhd = (struct logicalVolHeaderDesc *) - lvid->logicalVolContentsUse; - uniqueID = le64_to_cpu(lvhd->uniqueID); + if (UDF_SB(inode->i_sb)->s_lvid_bh) { *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = - cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); - if (!(++uniqueID & 0x00000000FFFFFFFFUL)) - uniqueID += 16; - lvhd->uniqueID = cpu_to_le64(uniqueID); - mark_buffer_dirty(bh); + cpu_to_le32(lvid_get_unique_id(sb)); } udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) mark_inode_dirty(dir); + up_write(&iinfo->i_data_sem); if (fibh.sbh != fibh.ebh) brelse(fibh.ebh); brelse(fibh.sbh); @@ -1044,10 +1017,10 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry, out: kfree(name); - unlock_kernel(); return err; out_no_entry: + up_write(&iinfo->i_data_sem); inode_dec_link_count(inode); iput(inode); goto out; @@ -1060,36 +1033,20 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir, struct udf_fileident_bh fibh; struct fileIdentDesc cfi, *fi; int err; - struct buffer_head *bh; - lock_kernel(); if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) { - unlock_kernel(); return -EMLINK; } fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err); if (!fi) { - unlock_kernel(); return err; } cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize); cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location); - bh = UDF_SB(inode->i_sb)->s_lvid_bh; - if (bh) { - struct logicalVolIntegrityDesc *lvid = - (struct logicalVolIntegrityDesc *)bh->b_data; - struct logicalVolHeaderDesc *lvhd; - uint64_t uniqueID; - lvhd = (struct logicalVolHeaderDesc *) - (lvid->logicalVolContentsUse); - uniqueID = le64_to_cpu(lvhd->uniqueID); + if (UDF_SB(inode->i_sb)->s_lvid_bh) { *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse = - cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL); - if (!(++uniqueID & 0x00000000FFFFFFFFUL)) - uniqueID += 16; - lvhd->uniqueID = cpu_to_le64(uniqueID); - mark_buffer_dirty(bh); + cpu_to_le32(lvid_get_unique_id(inode->i_sb)); } udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL); if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) @@ -1103,7 +1060,6 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir, mark_inode_dirty(inode); ihold(inode); d_instantiate(dentry, inode); - unlock_kernel(); return 0; } @@ -1124,7 +1080,6 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry, struct kernel_lb_addr tloc; struct udf_inode_info *old_iinfo = UDF_I(old_inode); - lock_kernel(); ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi); if (ofi) { if (ofibh.sbh != ofibh.ebh) @@ -1248,7 +1203,6 @@ end_rename: brelse(nfibh.ebh); brelse(nfibh.sbh); } - unlock_kernel(); return retval; } @@ -1261,7 +1215,6 @@ static struct dentry *udf_get_parent(struct dentry *child) struct fileIdentDesc cfi; struct udf_fileident_bh fibh; - lock_kernel(); if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi)) goto out_unlock; @@ -1273,11 +1226,9 @@ static struct dentry *udf_get_parent(struct dentry *child) inode = udf_iget(child->d_inode->i_sb, &tloc); if (!inode) goto out_unlock; - unlock_kernel(); return d_obtain_alias(inode); out_unlock: - unlock_kernel(); return ERR_PTR(-EACCES); } diff --git a/fs/udf/partition.c b/fs/udf/partition.c index 745eb20..a71090e 100644 --- a/fs/udf/partition.c +++ b/fs/udf/partition.c @@ -25,6 +25,7 @@ #include <linux/fs.h> #include <linux/string.h> #include <linux/buffer_head.h> +#include <linux/mutex.h> uint32_t udf_get_pblock(struct super_block *sb, uint32_t block, uint16_t partition, uint32_t offset) @@ -159,7 +160,9 @@ int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) struct udf_sb_info *sbi = UDF_SB(sb); u16 reallocationTableLen; struct buffer_head *bh; + int ret = 0; + mutex_lock(&sbi->s_alloc_mutex); for (i = 0; i < sbi->s_partitions; i++) { struct udf_part_map *map = &sbi->s_partmaps[i]; if (old_block > map->s_partition_root && @@ -175,8 +178,10 @@ int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) break; } - if (!st) - return 1; + if (!st) { + ret = 1; + goto out; + } reallocationTableLen = le16_to_cpu(st->reallocationTableLen); @@ -207,14 +212,16 @@ int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) ((old_block - map->s_partition_root) & (sdata->s_packet_len - 1)); - return 0; + ret = 0; + goto out; } else if (origLoc == packet) { *new_block = le32_to_cpu( entry->mappedLocation) + ((old_block - map->s_partition_root) & (sdata->s_packet_len - 1)); - return 0; + ret = 0; + goto out; } else if (origLoc > packet) break; } @@ -251,20 +258,24 @@ int udf_relocate_blocks(struct super_block *sb, long old_block, long *new_block) st->mapEntry[k].mappedLocation) + ((old_block - map->s_partition_root) & (sdata->s_packet_len - 1)); - return 0; + ret = 0; + goto out; } - return 1; + ret = 1; + goto out; } /* if old_block */ } if (i == sbi->s_partitions) { /* outside of partitions */ /* for now, fail =) */ - return 1; + ret = 1; } - return 0; +out: + mutex_unlock(&sbi->s_alloc_mutex); + return ret; } static uint32_t udf_try_read_meta(struct inode *inode, uint32_t block, diff --git a/fs/udf/super.c b/fs/udf/super.c index 76f3d6d..7b27b06 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -48,7 +48,6 @@ #include <linux/stat.h> #include <linux/cdrom.h> #include <linux/nls.h> -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include <linux/vfs.h> #include <linux/vmalloc.h> @@ -107,17 +106,16 @@ struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi) } /* UDF filesystem type */ -static int udf_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) +static struct dentry *udf_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super); } static struct file_system_type udf_fstype = { .owner = THIS_MODULE, .name = "udf", - .get_sb = udf_get_sb, + .mount = udf_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; @@ -136,15 +134,23 @@ static struct inode *udf_alloc_inode(struct super_block *sb) ei->i_next_alloc_block = 0; ei->i_next_alloc_goal = 0; ei->i_strat4096 = 0; + init_rwsem(&ei->i_data_sem); return &ei->vfs_inode; } -static void udf_destroy_inode(struct inode *inode) +static void udf_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(udf_inode_cachep, UDF_I(inode)); } +static void udf_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, udf_i_callback); +} + static void init_once(void *foo) { struct udf_inode_info *ei = (struct udf_inode_info *)foo; @@ -568,13 +574,14 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options) if (!udf_parse_options(options, &uopt, true)) return -EINVAL; - lock_kernel(); + write_lock(&sbi->s_cred_lock); sbi->s_flags = uopt.flags; sbi->s_uid = uopt.uid; sbi->s_gid = uopt.gid; sbi->s_umask = uopt.umask; sbi->s_fmode = uopt.fmode; sbi->s_dmode = uopt.dmode; + write_unlock(&sbi->s_cred_lock); if (sbi->s_lvid_bh) { int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev); @@ -591,7 +598,6 @@ static int udf_remount_fs(struct super_block *sb, int *flags, char *options) udf_open_lvid(sb); out_unlock: - unlock_kernel(); return error; } @@ -960,9 +966,9 @@ static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) (sizeof(struct buffer_head *) * nr_groups); if (size <= PAGE_SIZE) - bitmap = kmalloc(size, GFP_KERNEL); + bitmap = kzalloc(size, GFP_KERNEL); else - bitmap = vmalloc(size); /* TODO: get rid of vmalloc */ + bitmap = vzalloc(size); /* TODO: get rid of vzalloc */ if (bitmap == NULL) { udf_error(sb, __func__, @@ -971,7 +977,6 @@ static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index) return NULL; } - memset(bitmap, 0x00, size); bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1); bitmap->s_nr_groups = nr_groups; return bitmap; @@ -1775,6 +1780,8 @@ static void udf_open_lvid(struct super_block *sb) if (!bh) return; + + mutex_lock(&sbi->s_alloc_mutex); lvid = (struct logicalVolIntegrityDesc *)bh->b_data; lvidiu = udf_sb_lvidiu(sbi); @@ -1791,6 +1798,7 @@ static void udf_open_lvid(struct super_block *sb) lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); mark_buffer_dirty(bh); sbi->s_lvid_dirty = 0; + mutex_unlock(&sbi->s_alloc_mutex); } static void udf_close_lvid(struct super_block *sb) @@ -1803,6 +1811,7 @@ static void udf_close_lvid(struct super_block *sb) if (!bh) return; + mutex_lock(&sbi->s_alloc_mutex); lvid = (struct logicalVolIntegrityDesc *)bh->b_data; lvidiu = udf_sb_lvidiu(sbi); lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX; @@ -1823,6 +1832,34 @@ static void udf_close_lvid(struct super_block *sb) lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag); mark_buffer_dirty(bh); sbi->s_lvid_dirty = 0; + mutex_unlock(&sbi->s_alloc_mutex); +} + +u64 lvid_get_unique_id(struct super_block *sb) +{ + struct buffer_head *bh; + struct udf_sb_info *sbi = UDF_SB(sb); + struct logicalVolIntegrityDesc *lvid; + struct logicalVolHeaderDesc *lvhd; + u64 uniqueID; + u64 ret; + + bh = sbi->s_lvid_bh; + if (!bh) + return 0; + + lvid = (struct logicalVolIntegrityDesc *)bh->b_data; + lvhd = (struct logicalVolHeaderDesc *)lvid->logicalVolContentsUse; + + mutex_lock(&sbi->s_alloc_mutex); + ret = uniqueID = le64_to_cpu(lvhd->uniqueID); + if (!(++uniqueID & 0xFFFFFFFF)) + uniqueID += 16; + lvhd->uniqueID = cpu_to_le64(uniqueID); + mutex_unlock(&sbi->s_alloc_mutex); + mark_buffer_dirty(bh); + + return ret; } static void udf_sb_free_bitmap(struct udf_bitmap *bitmap) @@ -1880,8 +1917,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) struct kernel_lb_addr rootdir, fileset; struct udf_sb_info *sbi; - lock_kernel(); - uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT); uopt.uid = -1; uopt.gid = -1; @@ -1890,10 +1925,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) uopt.dmode = UDF_INVALID_MODE; sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL); - if (!sbi) { - unlock_kernel(); + if (!sbi) return -ENOMEM; - } sb->s_fs_info = sbi; @@ -1930,6 +1963,7 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) sbi->s_fmode = uopt.fmode; sbi->s_dmode = uopt.dmode; sbi->s_nls_map = uopt.nls_map; + rwlock_init(&sbi->s_cred_lock); if (uopt.session == 0xFFFFFFFF) sbi->s_session = udf_get_last_session(sb); @@ -2039,7 +2073,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent) goto error_out; } sb->s_maxbytes = MAX_LFS_FILESIZE; - unlock_kernel(); return 0; error_out: @@ -2060,7 +2093,6 @@ error_out: kfree(sbi); sb->s_fs_info = NULL; - unlock_kernel(); return -EINVAL; } @@ -2099,8 +2131,6 @@ static void udf_put_super(struct super_block *sb) sbi = UDF_SB(sb); - lock_kernel(); - if (sbi->s_vat_inode) iput(sbi->s_vat_inode); if (sbi->s_partitions) @@ -2116,8 +2146,6 @@ static void udf_put_super(struct super_block *sb) kfree(sbi->s_partmaps); kfree(sb->s_fs_info); sb->s_fs_info = NULL; - - unlock_kernel(); } static int udf_sync_fs(struct super_block *sb, int wait) @@ -2180,8 +2208,6 @@ static unsigned int udf_count_free_bitmap(struct super_block *sb, uint16_t ident; struct spaceBitmapDesc *bm; - lock_kernel(); - loc.logicalBlockNum = bitmap->s_extPosition; loc.partitionReferenceNum = UDF_SB(sb)->s_partition; bh = udf_read_ptagged(sb, &loc, 0, &ident); @@ -2218,10 +2244,7 @@ static unsigned int udf_count_free_bitmap(struct super_block *sb, } } brelse(bh); - out: - unlock_kernel(); - return accum; } @@ -2234,8 +2257,7 @@ static unsigned int udf_count_free_table(struct super_block *sb, int8_t etype; struct extent_position epos; - lock_kernel(); - + mutex_lock(&UDF_SB(sb)->s_alloc_mutex); epos.block = UDF_I(table)->i_location; epos.offset = sizeof(struct unallocSpaceEntry); epos.bh = NULL; @@ -2244,8 +2266,7 @@ static unsigned int udf_count_free_table(struct super_block *sb, accum += (elen >> table->i_sb->s_blocksize_bits); brelse(epos.bh); - - unlock_kernel(); + mutex_unlock(&UDF_SB(sb)->s_alloc_mutex); return accum; } diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c index 1606478..b1d4488 100644 --- a/fs/udf/symlink.c +++ b/fs/udf/symlink.c @@ -27,7 +27,6 @@ #include <linux/mm.h> #include <linux/stat.h> #include <linux/pagemap.h> -#include <linux/smp_lock.h> #include <linux/buffer_head.h> #include "udf_i.h" @@ -78,13 +77,16 @@ static int udf_symlink_filler(struct file *file, struct page *page) int err = -EIO; unsigned char *p = kmap(page); struct udf_inode_info *iinfo; + uint32_t pos; - lock_kernel(); iinfo = UDF_I(inode); + pos = udf_block_map(inode, 0); + + down_read(&iinfo->i_data_sem); if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) { symlink = iinfo->i_ext.i_data + iinfo->i_lenEAttr; } else { - bh = sb_bread(inode->i_sb, udf_block_map(inode, 0)); + bh = sb_bread(inode->i_sb, pos); if (!bh) goto out; @@ -95,14 +97,14 @@ static int udf_symlink_filler(struct file *file, struct page *page) udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p); brelse(bh); - unlock_kernel(); + up_read(&iinfo->i_data_sem); SetPageUptodate(page); kunmap(page); unlock_page(page); return 0; out: - unlock_kernel(); + up_read(&iinfo->i_data_sem); SetPageError(page); kunmap(page); unlock_page(page); diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h index e58d1de..d1bd31e 100644 --- a/fs/udf/udf_i.h +++ b/fs/udf/udf_i.h @@ -1,6 +1,18 @@ #ifndef _UDF_I_H #define _UDF_I_H +/* + * The i_data_sem and i_mutex serve for protection of allocation information + * of a regular files and symlinks. This includes all extents belonging to + * the file/symlink, a fact whether data are in-inode or in external data + * blocks, preallocation, goal block information... When extents are read, + * i_mutex or i_data_sem must be held (for reading is enough in case of + * i_data_sem). When extents are changed, i_data_sem must be held for writing + * and also i_mutex must be held. + * + * For directories i_mutex is used for all the necessary protection. + */ + struct udf_inode_info { struct timespec i_crtime; /* Physical address of inode */ @@ -21,6 +33,7 @@ struct udf_inode_info { struct long_ad *i_lad; __u8 *i_data; } i_ext; + struct rw_semaphore i_data_sem; struct inode vfs_inode; }; diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h index d113b72..4858c19 100644 --- a/fs/udf/udf_sb.h +++ b/fs/udf/udf_sb.h @@ -2,6 +2,7 @@ #define __LINUX_UDF_SB_H #include <linux/mutex.h> +#include <linux/bitops.h> /* Since UDF 2.01 is ISO 13346 based... */ #define UDF_SUPER_MAGIC 0x15013346 @@ -128,6 +129,8 @@ struct udf_sb_info { uid_t s_uid; mode_t s_fmode; mode_t s_dmode; + /* Lock protecting consistency of above permission settings */ + rwlock_t s_cred_lock; /* Root Info */ struct timespec s_record_time; @@ -139,7 +142,7 @@ struct udf_sb_info { __u16 s_udfrev; /* Miscellaneous flags */ - __u32 s_flags; + unsigned long s_flags; /* Encoding info */ struct nls_table *s_nls_map; @@ -161,8 +164,19 @@ struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi); int udf_compute_nr_groups(struct super_block *sb, u32 partition); -#define UDF_QUERY_FLAG(X,Y) ( UDF_SB(X)->s_flags & ( 1 << (Y) ) ) -#define UDF_SET_FLAG(X,Y) ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) ) -#define UDF_CLEAR_FLAG(X,Y) ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) ) +static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag) +{ + return test_bit(flag, &UDF_SB(sb)->s_flags); +} + +static inline void UDF_SET_FLAG(struct super_block *sb, int flag) +{ + set_bit(flag, &UDF_SB(sb)->s_flags); +} + +static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag) +{ + clear_bit(flag, &UDF_SB(sb)->s_flags); +} #endif /* __LINUX_UDF_SB_H */ diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h index 6995ab1..eba4820 100644 --- a/fs/udf/udfdecl.h +++ b/fs/udf/udfdecl.h @@ -111,6 +111,8 @@ struct extent_position { }; /* super.c */ + +__attribute__((format(printf, 3, 4))) extern void udf_warning(struct super_block *, const char *, const char *, ...); static inline void udf_updated_lvid(struct super_block *sb) { @@ -123,6 +125,7 @@ static inline void udf_updated_lvid(struct super_block *sb) sb->s_dirt = 1; UDF_SB(sb)->s_lvid_dirty = 1; } +extern u64 lvid_get_unique_id(struct super_block *sb); /* namei.c */ extern int udf_write_fi(struct inode *inode, struct fileIdentDesc *, @@ -133,7 +136,6 @@ extern int udf_write_fi(struct inode *inode, struct fileIdentDesc *, extern long udf_ioctl(struct file *, unsigned int, unsigned long); /* inode.c */ extern struct inode *udf_iget(struct super_block *, struct kernel_lb_addr *); -extern int udf_sync_inode(struct inode *); extern void udf_expand_file_adinicb(struct inode *, int, int *); extern struct buffer_head *udf_expand_dir_adinicb(struct inode *, int *, int *); extern struct buffer_head *udf_bread(struct inode *, int, int, int *); diff --git a/fs/ufs/super.c b/fs/ufs/super.c index 6b9be90..2c61ac5 100644 --- a/fs/ufs/super.c +++ b/fs/ufs/super.c @@ -1412,11 +1412,18 @@ static struct inode *ufs_alloc_inode(struct super_block *sb) return &ei->vfs_inode; } -static void ufs_destroy_inode(struct inode *inode) +static void ufs_i_callback(struct rcu_head *head) { + struct inode *inode = container_of(head, struct inode, i_rcu); + INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); } +static void ufs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, ufs_i_callback); +} + static void init_once(void *foo) { struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; @@ -1454,16 +1461,16 @@ static const struct super_operations ufs_super_ops = { .show_options = ufs_show_options, }; -static int ufs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static struct dentry *ufs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); + return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); } static struct file_system_type ufs_fs_type = { .owner = THIS_MODULE, .name = "ufs", - .get_sb = ufs_get_sb, + .mount = ufs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/xfs/linux-2.6/sv.h b/fs/xfs/linux-2.6/sv.h deleted file mode 100644 index 4dfc7c3..0000000 --- a/fs/xfs/linux-2.6/sv.h +++ /dev/null @@ -1,59 +0,0 @@ -/* - * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __XFS_SUPPORT_SV_H__ -#define __XFS_SUPPORT_SV_H__ - -#include <linux/wait.h> -#include <linux/sched.h> -#include <linux/spinlock.h> - -/* - * Synchronisation variables. - * - * (Parameters "pri", "svf" and "rts" are not implemented) - */ - -typedef struct sv_s { - wait_queue_head_t waiters; -} sv_t; - -static inline void _sv_wait(sv_t *sv, spinlock_t *lock) -{ - DECLARE_WAITQUEUE(wait, current); - - add_wait_queue_exclusive(&sv->waiters, &wait); - __set_current_state(TASK_UNINTERRUPTIBLE); - spin_unlock(lock); - - schedule(); - - remove_wait_queue(&sv->waiters, &wait); -} - -#define sv_init(sv,flag,name) \ - init_waitqueue_head(&(sv)->waiters) -#define sv_destroy(sv) \ - /*NOTHING*/ -#define sv_wait(sv, pri, lock, s) \ - _sv_wait(sv, lock) -#define sv_signal(sv) \ - wake_up(&(sv)->waiters) -#define sv_broadcast(sv) \ - wake_up_all(&(sv)->waiters) - -#endif /* __XFS_SUPPORT_SV_H__ */ diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c index b277186..39f4f80 100644 --- a/fs/xfs/linux-2.6/xfs_acl.c +++ b/fs/xfs/linux-2.6/xfs_acl.c @@ -219,12 +219,13 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) } int -xfs_check_acl(struct inode *inode, int mask) +xfs_check_acl(struct inode *inode, int mask, unsigned int flags) { - struct xfs_inode *ip = XFS_I(inode); + struct xfs_inode *ip; struct posix_acl *acl; int error = -EAGAIN; + ip = XFS_I(inode); trace_xfs_check_acl(ip); /* @@ -234,6 +235,12 @@ xfs_check_acl(struct inode *inode, int mask) if (!XFS_IFORK_Q(ip)) return -EAGAIN; + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + return -ECHILD; + return -EAGAIN; + } + acl = xfs_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl); diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index c9af48f..ec7bbb5 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -38,15 +38,6 @@ #include <linux/pagevec.h> #include <linux/writeback.h> -/* - * Types of I/O for bmap clustering and I/O completion tracking. - */ -enum { - IO_READ, /* mapping for a read */ - IO_DELAY, /* mapping covers delalloc region */ - IO_UNWRITTEN, /* mapping covers allocated but uninitialized data */ - IO_NEW /* just allocated */ -}; /* * Prime number of hash buckets since address is used as the key. @@ -182,9 +173,6 @@ xfs_setfilesize( xfs_inode_t *ip = XFS_I(ioend->io_inode); xfs_fsize_t isize; - ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); - ASSERT(ioend->io_type != IO_READ); - if (unlikely(ioend->io_error)) return 0; @@ -244,10 +232,8 @@ xfs_end_io( * We might have to update the on-disk file size after extending * writes. */ - if (ioend->io_type != IO_READ) { - error = xfs_setfilesize(ioend); - ASSERT(!error || error == EAGAIN); - } + error = xfs_setfilesize(ioend); + ASSERT(!error || error == EAGAIN); /* * If we didn't complete processing of the ioend, requeue it to the @@ -318,14 +304,63 @@ STATIC int xfs_map_blocks( struct inode *inode, loff_t offset, - ssize_t count, struct xfs_bmbt_irec *imap, - int flags) + int type, + int nonblocking) { - int nmaps = 1; - int new = 0; + struct xfs_inode *ip = XFS_I(inode); + struct xfs_mount *mp = ip->i_mount; + ssize_t count = 1 << inode->i_blkbits; + xfs_fileoff_t offset_fsb, end_fsb; + int error = 0; + int bmapi_flags = XFS_BMAPI_ENTIRE; + int nimaps = 1; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -XFS_ERROR(EIO); + + if (type == IO_UNWRITTEN) + bmapi_flags |= XFS_BMAPI_IGSTATE; + + if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { + if (nonblocking) + return -XFS_ERROR(EAGAIN); + xfs_ilock(ip, XFS_ILOCK_SHARED); + } + + ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || + (ip->i_df.if_flags & XFS_IFEXTENTS)); + ASSERT(offset <= mp->m_maxioffset); + + if (offset + count > mp->m_maxioffset) + count = mp->m_maxioffset - offset; + end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); + offset_fsb = XFS_B_TO_FSBT(mp, offset); + error = xfs_bmapi(NULL, ip, offset_fsb, end_fsb - offset_fsb, + bmapi_flags, NULL, 0, imap, &nimaps, NULL); + xfs_iunlock(ip, XFS_ILOCK_SHARED); - return -xfs_iomap(XFS_I(inode), offset, count, flags, imap, &nmaps, &new); + if (error) + return -XFS_ERROR(error); + + if (type == IO_DELALLOC && + (!nimaps || isnullstartblock(imap->br_startblock))) { + error = xfs_iomap_write_allocate(ip, offset, count, imap); + if (!error) + trace_xfs_map_blocks_alloc(ip, offset, count, type, imap); + return -XFS_ERROR(error); + } + +#ifdef DEBUG + if (type == IO_UNWRITTEN) { + ASSERT(nimaps); + ASSERT(imap->br_startblock != HOLESTARTBLOCK); + ASSERT(imap->br_startblock != DELAYSTARTBLOCK); + } +#endif + if (nimaps) + trace_xfs_map_blocks_found(ip, offset, count, type, imap); + return 0; } STATIC int @@ -380,26 +415,18 @@ xfs_submit_ioend_bio( submit_bio(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC_PLUG : WRITE, bio); - ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP)); - bio_put(bio); } STATIC struct bio * xfs_alloc_ioend_bio( struct buffer_head *bh) { - struct bio *bio; int nvecs = bio_get_nr_vecs(bh->b_bdev); - - do { - bio = bio_alloc(GFP_NOIO, nvecs); - nvecs >>= 1; - } while (!bio); + struct bio *bio = bio_alloc(GFP_NOIO, nvecs); ASSERT(bio->bi_private == NULL); bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9); bio->bi_bdev = bh->b_bdev; - bio_get(bio); return bio; } @@ -470,9 +497,8 @@ xfs_submit_ioend( /* Pass 1 - start writeback */ do { next = ioend->io_list; - for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { + for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) xfs_start_buffer_writeback(bh); - } } while ((ioend = next) != NULL); /* Pass 2 - submit I/O */ @@ -600,117 +626,13 @@ xfs_map_at_offset( ASSERT(imap->br_startblock != HOLESTARTBLOCK); ASSERT(imap->br_startblock != DELAYSTARTBLOCK); - lock_buffer(bh); xfs_map_buffer(inode, bh, imap, offset); - bh->b_bdev = xfs_find_bdev_for_inode(inode); set_buffer_mapped(bh); clear_buffer_delay(bh); clear_buffer_unwritten(bh); } /* - * Look for a page at index that is suitable for clustering. - */ -STATIC unsigned int -xfs_probe_page( - struct page *page, - unsigned int pg_offset) -{ - struct buffer_head *bh, *head; - int ret = 0; - - if (PageWriteback(page)) - return 0; - if (!PageDirty(page)) - return 0; - if (!page->mapping) - return 0; - if (!page_has_buffers(page)) - return 0; - - bh = head = page_buffers(page); - do { - if (!buffer_uptodate(bh)) - break; - if (!buffer_mapped(bh)) - break; - ret += bh->b_size; - if (ret >= pg_offset) - break; - } while ((bh = bh->b_this_page) != head); - - return ret; -} - -STATIC size_t -xfs_probe_cluster( - struct inode *inode, - struct page *startpage, - struct buffer_head *bh, - struct buffer_head *head) -{ - struct pagevec pvec; - pgoff_t tindex, tlast, tloff; - size_t total = 0; - int done = 0, i; - - /* First sum forwards in this page */ - do { - if (!buffer_uptodate(bh) || !buffer_mapped(bh)) - return total; - total += bh->b_size; - } while ((bh = bh->b_this_page) != head); - - /* if we reached the end of the page, sum forwards in following pages */ - tlast = i_size_read(inode) >> PAGE_CACHE_SHIFT; - tindex = startpage->index + 1; - - /* Prune this back to avoid pathological behavior */ - tloff = min(tlast, startpage->index + 64); - - pagevec_init(&pvec, 0); - while (!done && tindex <= tloff) { - unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); - - if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) - break; - - for (i = 0; i < pagevec_count(&pvec); i++) { - struct page *page = pvec.pages[i]; - size_t pg_offset, pg_len = 0; - - if (tindex == tlast) { - pg_offset = - i_size_read(inode) & (PAGE_CACHE_SIZE - 1); - if (!pg_offset) { - done = 1; - break; - } - } else - pg_offset = PAGE_CACHE_SIZE; - - if (page->index == tindex && trylock_page(page)) { - pg_len = xfs_probe_page(page, pg_offset); - unlock_page(page); - } - - if (!pg_len) { - done = 1; - break; - } - - total += pg_len; - tindex++; - } - - pagevec_release(&pvec); - cond_resched(); - } - - return total; -} - -/* * Test if a given page is suitable for writing as part of an unwritten * or delayed allocate extent. */ @@ -731,9 +653,9 @@ xfs_is_delayed_page( if (buffer_unwritten(bh)) acceptable = (type == IO_UNWRITTEN); else if (buffer_delay(bh)) - acceptable = (type == IO_DELAY); + acceptable = (type == IO_DELALLOC); else if (buffer_dirty(bh) && buffer_mapped(bh)) - acceptable = (type == IO_NEW); + acceptable = (type == IO_OVERWRITE); else break; } while ((bh = bh->b_this_page) != head); @@ -758,8 +680,7 @@ xfs_convert_page( loff_t tindex, struct xfs_bmbt_irec *imap, xfs_ioend_t **ioendp, - struct writeback_control *wbc, - int all_bh) + struct writeback_control *wbc) { struct buffer_head *bh, *head; xfs_off_t end_offset; @@ -814,37 +735,30 @@ xfs_convert_page( continue; } - if (buffer_unwritten(bh) || buffer_delay(bh)) { + if (buffer_unwritten(bh) || buffer_delay(bh) || + buffer_mapped(bh)) { if (buffer_unwritten(bh)) type = IO_UNWRITTEN; + else if (buffer_delay(bh)) + type = IO_DELALLOC; else - type = IO_DELAY; + type = IO_OVERWRITE; if (!xfs_imap_valid(inode, imap, offset)) { done = 1; continue; } - ASSERT(imap->br_startblock != HOLESTARTBLOCK); - ASSERT(imap->br_startblock != DELAYSTARTBLOCK); - - xfs_map_at_offset(inode, bh, imap, offset); + lock_buffer(bh); + if (type != IO_OVERWRITE) + xfs_map_at_offset(inode, bh, imap, offset); xfs_add_to_ioend(inode, bh, offset, type, ioendp, done); page_dirty--; count++; } else { - type = IO_NEW; - if (buffer_mapped(bh) && all_bh) { - lock_buffer(bh); - xfs_add_to_ioend(inode, bh, offset, - type, ioendp, done); - count++; - page_dirty--; - } else { - done = 1; - } + done = 1; } } while (offset += len, (bh = bh->b_this_page) != head); @@ -876,7 +790,6 @@ xfs_cluster_write( struct xfs_bmbt_irec *imap, xfs_ioend_t **ioendp, struct writeback_control *wbc, - int all_bh, pgoff_t tlast) { struct pagevec pvec; @@ -891,7 +804,7 @@ xfs_cluster_write( for (i = 0; i < pagevec_count(&pvec); i++) { done = xfs_convert_page(inode, pvec.pages[i], tindex++, - imap, ioendp, wbc, all_bh); + imap, ioendp, wbc); if (done) break; } @@ -934,9 +847,8 @@ xfs_aops_discard_page( struct xfs_inode *ip = XFS_I(inode); struct buffer_head *bh, *head; loff_t offset = page_offset(page); - ssize_t len = 1 << inode->i_blkbits; - if (!xfs_is_delayed_page(page, IO_DELAY)) + if (!xfs_is_delayed_page(page, IO_DELALLOC)) goto out_invalidate; if (XFS_FORCED_SHUTDOWN(ip->i_mount)) @@ -949,58 +861,14 @@ xfs_aops_discard_page( xfs_ilock(ip, XFS_ILOCK_EXCL); bh = head = page_buffers(page); do { - int done; - xfs_fileoff_t offset_fsb; - xfs_bmbt_irec_t imap; - int nimaps = 1; int error; - xfs_fsblock_t firstblock; - xfs_bmap_free_t flist; + xfs_fileoff_t start_fsb; if (!buffer_delay(bh)) goto next_buffer; - offset_fsb = XFS_B_TO_FSBT(ip->i_mount, offset); - - /* - * Map the range first and check that it is a delalloc extent - * before trying to unmap the range. Otherwise we will be - * trying to remove a real extent (which requires a - * transaction) or a hole, which is probably a bad idea... - */ - error = xfs_bmapi(NULL, ip, offset_fsb, 1, - XFS_BMAPI_ENTIRE, NULL, 0, &imap, - &nimaps, NULL); - - if (error) { - /* something screwed, just bail */ - if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { - xfs_fs_cmn_err(CE_ALERT, ip->i_mount, - "page discard failed delalloc mapping lookup."); - } - break; - } - if (!nimaps) { - /* nothing there */ - goto next_buffer; - } - if (imap.br_startblock != DELAYSTARTBLOCK) { - /* been converted, ignore */ - goto next_buffer; - } - WARN_ON(imap.br_blockcount == 0); - - /* - * Note: while we initialise the firstblock/flist pair, they - * should never be used because blocks should never be - * allocated or freed for a delalloc extent and hence we need - * don't cancel or finish them after the xfs_bunmapi() call. - */ - xfs_bmap_init(&flist, &firstblock); - error = xfs_bunmapi(NULL, ip, offset_fsb, 1, 0, 1, &firstblock, - &flist, &done); - - ASSERT(!flist.xbf_count && !flist.xbf_first); + start_fsb = XFS_B_TO_FSBT(ip->i_mount, offset); + error = xfs_bmap_punch_delalloc_range(ip, start_fsb, 1); if (error) { /* something screwed, just bail */ if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { @@ -1010,7 +878,7 @@ xfs_aops_discard_page( break; } next_buffer: - offset += len; + offset += 1 << inode->i_blkbits; } while ((bh = bh->b_this_page) != head); @@ -1047,10 +915,10 @@ xfs_vm_writepage( unsigned int type; __uint64_t end_offset; pgoff_t end_index, last_index; - ssize_t size, len; - int flags, err, imap_valid = 0, uptodate = 1; + ssize_t len; + int err, imap_valid = 0, uptodate = 1; int count = 0; - int all_bh = 0; + int nonblocking = 0; trace_xfs_writepage(inode, page, 0); @@ -1101,109 +969,78 @@ xfs_vm_writepage( bh = head = page_buffers(page); offset = page_offset(page); - flags = BMAPI_READ; - type = IO_NEW; + type = IO_OVERWRITE; + + if (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking) + nonblocking = 1; do { + int new_ioend = 0; + if (offset >= end_offset) break; if (!buffer_uptodate(bh)) uptodate = 0; /* - * A hole may still be marked uptodate because discard_buffer - * leaves the flag set. + * set_page_dirty dirties all buffers in a page, independent + * of their state. The dirty state however is entirely + * meaningless for holes (!mapped && uptodate), so skip + * buffers covering holes here. */ if (!buffer_mapped(bh) && buffer_uptodate(bh)) { - ASSERT(!buffer_dirty(bh)); imap_valid = 0; continue; } - if (imap_valid) - imap_valid = xfs_imap_valid(inode, &imap, offset); - - if (buffer_unwritten(bh) || buffer_delay(bh)) { - int new_ioend = 0; - - /* - * Make sure we don't use a read-only iomap - */ - if (flags == BMAPI_READ) - imap_valid = 0; - - if (buffer_unwritten(bh)) { + if (buffer_unwritten(bh)) { + if (type != IO_UNWRITTEN) { type = IO_UNWRITTEN; - flags = BMAPI_WRITE | BMAPI_IGNSTATE; - } else if (buffer_delay(bh)) { - type = IO_DELAY; - flags = BMAPI_ALLOCATE; - - if (wbc->sync_mode == WB_SYNC_NONE) - flags |= BMAPI_TRYLOCK; - } - - if (!imap_valid) { - /* - * If we didn't have a valid mapping then we - * need to ensure that we put the new mapping - * in a new ioend structure. This needs to be - * done to ensure that the ioends correctly - * reflect the block mappings at io completion - * for unwritten extent conversion. - */ - new_ioend = 1; - err = xfs_map_blocks(inode, offset, len, - &imap, flags); - if (err) - goto error; - imap_valid = xfs_imap_valid(inode, &imap, - offset); + imap_valid = 0; } - if (imap_valid) { - xfs_map_at_offset(inode, bh, &imap, offset); - xfs_add_to_ioend(inode, bh, offset, type, - &ioend, new_ioend); - count++; + } else if (buffer_delay(bh)) { + if (type != IO_DELALLOC) { + type = IO_DELALLOC; + imap_valid = 0; } } else if (buffer_uptodate(bh)) { - /* - * we got here because the buffer is already mapped. - * That means it must already have extents allocated - * underneath it. Map the extent by reading it. - */ - if (!imap_valid || flags != BMAPI_READ) { - flags = BMAPI_READ; - size = xfs_probe_cluster(inode, page, bh, head); - err = xfs_map_blocks(inode, offset, size, - &imap, flags); - if (err) - goto error; - imap_valid = xfs_imap_valid(inode, &imap, - offset); + if (type != IO_OVERWRITE) { + type = IO_OVERWRITE; + imap_valid = 0; + } + } else { + if (PageUptodate(page)) { + ASSERT(buffer_mapped(bh)); + imap_valid = 0; } + continue; + } + if (imap_valid) + imap_valid = xfs_imap_valid(inode, &imap, offset); + if (!imap_valid) { /* - * We set the type to IO_NEW in case we are doing a - * small write at EOF that is extending the file but - * without needing an allocation. We need to update the - * file size on I/O completion in this case so it is - * the same case as having just allocated a new extent - * that we are writing into for the first time. + * If we didn't have a valid mapping then we need to + * put the new mapping into a separate ioend structure. + * This ensures non-contiguous extents always have + * separate ioends, which is particularly important + * for unwritten extent conversion at I/O completion + * time. */ - type = IO_NEW; - if (trylock_buffer(bh)) { - if (imap_valid) - all_bh = 1; - xfs_add_to_ioend(inode, bh, offset, type, - &ioend, !imap_valid); - count++; - } else { - imap_valid = 0; - } - } else if (PageUptodate(page)) { - ASSERT(buffer_mapped(bh)); - imap_valid = 0; + new_ioend = 1; + err = xfs_map_blocks(inode, offset, &imap, type, + nonblocking); + if (err) + goto error; + imap_valid = xfs_imap_valid(inode, &imap, offset); + } + if (imap_valid) { + lock_buffer(bh); + if (type != IO_OVERWRITE) + xfs_map_at_offset(inode, bh, &imap, offset); + xfs_add_to_ioend(inode, bh, offset, type, &ioend, + new_ioend); + count++; } if (!iohead) @@ -1232,7 +1069,7 @@ xfs_vm_writepage( end_index = last_index; xfs_cluster_write(inode, page->index + 1, &imap, &ioend, - wbc, all_bh, end_index); + wbc, end_index); } if (iohead) @@ -1301,13 +1138,19 @@ __xfs_get_blocks( int create, int direct) { - int flags = create ? BMAPI_WRITE : BMAPI_READ; + struct xfs_inode *ip = XFS_I(inode); + struct xfs_mount *mp = ip->i_mount; + xfs_fileoff_t offset_fsb, end_fsb; + int error = 0; + int lockmode = 0; struct xfs_bmbt_irec imap; + int nimaps = 1; xfs_off_t offset; ssize_t size; - int nimap = 1; int new = 0; - int error; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -XFS_ERROR(EIO); offset = (xfs_off_t)iblock << inode->i_blkbits; ASSERT(bh_result->b_size >= (1 << inode->i_blkbits)); @@ -1316,15 +1159,45 @@ __xfs_get_blocks( if (!create && direct && offset >= i_size_read(inode)) return 0; - if (direct && create) - flags |= BMAPI_DIRECT; + if (create) { + lockmode = XFS_ILOCK_EXCL; + xfs_ilock(ip, lockmode); + } else { + lockmode = xfs_ilock_map_shared(ip); + } + + ASSERT(offset <= mp->m_maxioffset); + if (offset + size > mp->m_maxioffset) + size = mp->m_maxioffset - offset; + end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size); + offset_fsb = XFS_B_TO_FSBT(mp, offset); - error = xfs_iomap(XFS_I(inode), offset, size, flags, &imap, &nimap, - &new); + error = xfs_bmapi(NULL, ip, offset_fsb, end_fsb - offset_fsb, + XFS_BMAPI_ENTIRE, NULL, 0, &imap, &nimaps, NULL); if (error) - return -error; - if (nimap == 0) - return 0; + goto out_unlock; + + if (create && + (!nimaps || + (imap.br_startblock == HOLESTARTBLOCK || + imap.br_startblock == DELAYSTARTBLOCK))) { + if (direct) { + error = xfs_iomap_write_direct(ip, offset, size, + &imap, nimaps); + } else { + error = xfs_iomap_write_delay(ip, offset, size, &imap); + } + if (error) + goto out_unlock; + + trace_xfs_get_blocks_alloc(ip, offset, size, 0, &imap); + } else if (nimaps) { + trace_xfs_get_blocks_found(ip, offset, size, 0, &imap); + } else { + trace_xfs_get_blocks_notfound(ip, offset, size); + goto out_unlock; + } + xfs_iunlock(ip, lockmode); if (imap.br_startblock != HOLESTARTBLOCK && imap.br_startblock != DELAYSTARTBLOCK) { @@ -1391,6 +1264,10 @@ __xfs_get_blocks( } return 0; + +out_unlock: + xfs_iunlock(ip, lockmode); + return -error; } int @@ -1478,7 +1355,7 @@ xfs_vm_direct_IO( ssize_t ret; if (rw & WRITE) { - iocb->private = xfs_alloc_ioend(inode, IO_NEW); + iocb->private = xfs_alloc_ioend(inode, IO_DIRECT); ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset, nr_segs, @@ -1504,11 +1381,42 @@ xfs_vm_write_failed( struct inode *inode = mapping->host; if (to > inode->i_size) { - struct iattr ia = { - .ia_valid = ATTR_SIZE | ATTR_FORCE, - .ia_size = inode->i_size, - }; - xfs_setattr(XFS_I(inode), &ia, XFS_ATTR_NOLOCK); + /* + * punch out the delalloc blocks we have already allocated. We + * don't call xfs_setattr() to do this as we may be in the + * middle of a multi-iovec write and so the vfs inode->i_size + * will not match the xfs ip->i_size and so it will zero too + * much. Hence we jus truncate the page cache to zero what is + * necessary and punch the delalloc blocks directly. + */ + struct xfs_inode *ip = XFS_I(inode); + xfs_fileoff_t start_fsb; + xfs_fileoff_t end_fsb; + int error; + + truncate_pagecache(inode, to, inode->i_size); + + /* + * Check if there are any blocks that are outside of i_size + * that need to be trimmed back. + */ + start_fsb = XFS_B_TO_FSB(ip->i_mount, inode->i_size) + 1; + end_fsb = XFS_B_TO_FSB(ip->i_mount, to); + if (end_fsb <= start_fsb) + return; + + xfs_ilock(ip, XFS_ILOCK_EXCL); + error = xfs_bmap_punch_delalloc_range(ip, start_fsb, + end_fsb - start_fsb); + if (error) { + /* something screwed, just bail */ + if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { + xfs_fs_cmn_err(CE_ALERT, ip->i_mount, + "xfs_vm_write_failed: unable to clean up ino %lld", + ip->i_ino); + } + } + xfs_iunlock(ip, XFS_ILOCK_EXCL); } } diff --git a/fs/xfs/linux-2.6/xfs_aops.h b/fs/xfs/linux-2.6/xfs_aops.h index c5057fb..71f721e 100644 --- a/fs/xfs/linux-2.6/xfs_aops.h +++ b/fs/xfs/linux-2.6/xfs_aops.h @@ -23,6 +23,22 @@ extern struct workqueue_struct *xfsconvertd_workqueue; extern mempool_t *xfs_ioend_pool; /* + * Types of I/O for bmap clustering and I/O completion tracking. + */ +enum { + IO_DIRECT = 0, /* special case for direct I/O ioends */ + IO_DELALLOC, /* mapping covers delalloc region */ + IO_UNWRITTEN, /* mapping covers allocated but uninitialized data */ + IO_OVERWRITE, /* mapping covers already allocated extent */ +}; + +#define XFS_IO_TYPES \ + { 0, "" }, \ + { IO_DELALLOC, "delalloc" }, \ + { IO_UNWRITTEN, "unwritten" }, \ + { IO_OVERWRITE, "overwrite" } + +/* * xfs_ioend struct manages large extent writes for XFS. * It can manage several multi-page bio's at once. */ diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index 63fd2c0..92f1f2a 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -44,12 +44,7 @@ static kmem_zone_t *xfs_buf_zone; STATIC int xfsbufd(void *); -STATIC int xfsbufd_wakeup(struct shrinker *, int, gfp_t); STATIC void xfs_buf_delwri_queue(xfs_buf_t *, int); -static struct shrinker xfs_buf_shake = { - .shrink = xfsbufd_wakeup, - .seeks = DEFAULT_SEEKS, -}; static struct workqueue_struct *xfslogd_workqueue; struct workqueue_struct *xfsdatad_workqueue; @@ -168,8 +163,79 @@ test_page_region( } /* - * Internal xfs_buf_t object manipulation + * xfs_buf_lru_add - add a buffer to the LRU. + * + * The LRU takes a new reference to the buffer so that it will only be freed + * once the shrinker takes the buffer off the LRU. */ +STATIC void +xfs_buf_lru_add( + struct xfs_buf *bp) +{ + struct xfs_buftarg *btp = bp->b_target; + + spin_lock(&btp->bt_lru_lock); + if (list_empty(&bp->b_lru)) { + atomic_inc(&bp->b_hold); + list_add_tail(&bp->b_lru, &btp->bt_lru); + btp->bt_lru_nr++; + } + spin_unlock(&btp->bt_lru_lock); +} + +/* + * xfs_buf_lru_del - remove a buffer from the LRU + * + * The unlocked check is safe here because it only occurs when there are not + * b_lru_ref counts left on the inode under the pag->pag_buf_lock. it is there + * to optimise the shrinker removing the buffer from the LRU and calling + * xfs_buf_free(). i.e. it removes an unneccessary round trip on the + * bt_lru_lock. + */ +STATIC void +xfs_buf_lru_del( + struct xfs_buf *bp) +{ + struct xfs_buftarg *btp = bp->b_target; + + if (list_empty(&bp->b_lru)) + return; + + spin_lock(&btp->bt_lru_lock); + if (!list_empty(&bp->b_lru)) { + list_del_init(&bp->b_lru); + btp->bt_lru_nr--; + } + spin_unlock(&btp->bt_lru_lock); +} + +/* + * When we mark a buffer stale, we remove the buffer from the LRU and clear the + * b_lru_ref count so that the buffer is freed immediately when the buffer + * reference count falls to zero. If the buffer is already on the LRU, we need + * to remove the reference that LRU holds on the buffer. + * + * This prevents build-up of stale buffers on the LRU. + */ +void +xfs_buf_stale( + struct xfs_buf *bp) +{ + bp->b_flags |= XBF_STALE; + atomic_set(&(bp)->b_lru_ref, 0); + if (!list_empty(&bp->b_lru)) { + struct xfs_buftarg *btp = bp->b_target; + + spin_lock(&btp->bt_lru_lock); + if (!list_empty(&bp->b_lru)) { + list_del_init(&bp->b_lru); + btp->bt_lru_nr--; + atomic_dec(&bp->b_hold); + } + spin_unlock(&btp->bt_lru_lock); + } + ASSERT(atomic_read(&bp->b_hold) >= 1); +} STATIC void _xfs_buf_initialize( @@ -186,7 +252,9 @@ _xfs_buf_initialize( memset(bp, 0, sizeof(xfs_buf_t)); atomic_set(&bp->b_hold, 1); + atomic_set(&bp->b_lru_ref, 1); init_completion(&bp->b_iowait); + INIT_LIST_HEAD(&bp->b_lru); INIT_LIST_HEAD(&bp->b_list); RB_CLEAR_NODE(&bp->b_rbnode); sema_init(&bp->b_sema, 0); /* held, no waiters */ @@ -262,6 +330,8 @@ xfs_buf_free( { trace_xfs_buf_free(bp, _RET_IP_); + ASSERT(list_empty(&bp->b_lru)); + if (bp->b_flags & (_XBF_PAGE_CACHE|_XBF_PAGES)) { uint i; @@ -337,7 +407,6 @@ _xfs_buf_lookup_pages( __func__, gfp_mask); XFS_STATS_INC(xb_page_retries); - xfsbufd_wakeup(NULL, 0, gfp_mask); congestion_wait(BLK_RW_ASYNC, HZ/50); goto retry; } @@ -488,29 +557,16 @@ found: spin_unlock(&pag->pag_buf_lock); xfs_perag_put(pag); - /* Attempt to get the semaphore without sleeping, - * if this does not work then we need to drop the - * spinlock and do a hard attempt on the semaphore. - */ - if (down_trylock(&bp->b_sema)) { + if (xfs_buf_cond_lock(bp)) { + /* failed, so wait for the lock if requested. */ if (!(flags & XBF_TRYLOCK)) { - /* wait for buffer ownership */ xfs_buf_lock(bp); XFS_STATS_INC(xb_get_locked_waited); } else { - /* We asked for a trylock and failed, no need - * to look at file offset and length here, we - * know that this buffer at least overlaps our - * buffer and is locked, therefore our buffer - * either does not exist, or is this buffer. - */ xfs_buf_rele(bp); XFS_STATS_INC(xb_busy_locked); return NULL; } - } else { - /* trylock worked */ - XB_SET_OWNER(bp); } if (bp->b_flags & XBF_STALE) { @@ -841,6 +897,7 @@ xfs_buf_rele( if (!pag) { ASSERT(!bp->b_relse); + ASSERT(list_empty(&bp->b_lru)); ASSERT(RB_EMPTY_NODE(&bp->b_rbnode)); if (atomic_dec_and_test(&bp->b_hold)) xfs_buf_free(bp); @@ -848,13 +905,19 @@ xfs_buf_rele( } ASSERT(!RB_EMPTY_NODE(&bp->b_rbnode)); + ASSERT(atomic_read(&bp->b_hold) > 0); if (atomic_dec_and_lock(&bp->b_hold, &pag->pag_buf_lock)) { if (bp->b_relse) { atomic_inc(&bp->b_hold); spin_unlock(&pag->pag_buf_lock); bp->b_relse(bp); + } else if (!(bp->b_flags & XBF_STALE) && + atomic_read(&bp->b_lru_ref)) { + xfs_buf_lru_add(bp); + spin_unlock(&pag->pag_buf_lock); } else { + xfs_buf_lru_del(bp); ASSERT(!(bp->b_flags & (XBF_DELWRI|_XBF_DELWRI_Q))); rb_erase(&bp->b_rbnode, &pag->pag_buf_tree); spin_unlock(&pag->pag_buf_lock); @@ -876,10 +939,18 @@ xfs_buf_rele( */ /* - * Locks a buffer object, if it is not already locked. - * Note that this in no way locks the underlying pages, so it is only - * useful for synchronizing concurrent use of buffer objects, not for - * synchronizing independent access to the underlying pages. + * Locks a buffer object, if it is not already locked. Note that this in + * no way locks the underlying pages, so it is only useful for + * synchronizing concurrent use of buffer objects, not for synchronizing + * independent access to the underlying pages. + * + * If we come across a stale, pinned, locked buffer, we know that we are + * being asked to lock a buffer that has been reallocated. Because it is + * pinned, we know that the log has not been pushed to disk and hence it + * will still be locked. Rather than continuing to have trylock attempts + * fail until someone else pushes the log, push it ourselves before + * returning. This means that the xfsaild will not get stuck trying + * to push on stale inode buffers. */ int xfs_buf_cond_lock( @@ -890,6 +961,8 @@ xfs_buf_cond_lock( locked = down_trylock(&bp->b_sema) == 0; if (locked) XB_SET_OWNER(bp); + else if (atomic_read(&bp->b_pin_count) && (bp->b_flags & XBF_STALE)) + xfs_log_force(bp->b_target->bt_mount, 0); trace_xfs_buf_cond_lock(bp, _RET_IP_); return locked ? 0 : -EBUSY; @@ -1441,51 +1514,84 @@ xfs_buf_iomove( */ /* - * Wait for any bufs with callbacks that have been submitted but - * have not yet returned... walk the hash list for the target. + * Wait for any bufs with callbacks that have been submitted but have not yet + * returned. These buffers will have an elevated hold count, so wait on those + * while freeing all the buffers only held by the LRU. */ void xfs_wait_buftarg( struct xfs_buftarg *btp) { - struct xfs_perag *pag; - uint i; + struct xfs_buf *bp; - for (i = 0; i < btp->bt_mount->m_sb.sb_agcount; i++) { - pag = xfs_perag_get(btp->bt_mount, i); - spin_lock(&pag->pag_buf_lock); - while (rb_first(&pag->pag_buf_tree)) { - spin_unlock(&pag->pag_buf_lock); +restart: + spin_lock(&btp->bt_lru_lock); + while (!list_empty(&btp->bt_lru)) { + bp = list_first_entry(&btp->bt_lru, struct xfs_buf, b_lru); + if (atomic_read(&bp->b_hold) > 1) { + spin_unlock(&btp->bt_lru_lock); delay(100); - spin_lock(&pag->pag_buf_lock); + goto restart; } - spin_unlock(&pag->pag_buf_lock); - xfs_perag_put(pag); + /* + * clear the LRU reference count so the bufer doesn't get + * ignored in xfs_buf_rele(). + */ + atomic_set(&bp->b_lru_ref, 0); + spin_unlock(&btp->bt_lru_lock); + xfs_buf_rele(bp); + spin_lock(&btp->bt_lru_lock); } + spin_unlock(&btp->bt_lru_lock); } -/* - * buftarg list for delwrite queue processing - */ -static LIST_HEAD(xfs_buftarg_list); -static DEFINE_SPINLOCK(xfs_buftarg_lock); - -STATIC void -xfs_register_buftarg( - xfs_buftarg_t *btp) +int +xfs_buftarg_shrink( + struct shrinker *shrink, + int nr_to_scan, + gfp_t mask) { - spin_lock(&xfs_buftarg_lock); - list_add(&btp->bt_list, &xfs_buftarg_list); - spin_unlock(&xfs_buftarg_lock); -} + struct xfs_buftarg *btp = container_of(shrink, + struct xfs_buftarg, bt_shrinker); + struct xfs_buf *bp; + LIST_HEAD(dispose); -STATIC void -xfs_unregister_buftarg( - xfs_buftarg_t *btp) -{ - spin_lock(&xfs_buftarg_lock); - list_del(&btp->bt_list); - spin_unlock(&xfs_buftarg_lock); + if (!nr_to_scan) + return btp->bt_lru_nr; + + spin_lock(&btp->bt_lru_lock); + while (!list_empty(&btp->bt_lru)) { + if (nr_to_scan-- <= 0) + break; + + bp = list_first_entry(&btp->bt_lru, struct xfs_buf, b_lru); + + /* + * Decrement the b_lru_ref count unless the value is already + * zero. If the value is already zero, we need to reclaim the + * buffer, otherwise it gets another trip through the LRU. + */ + if (!atomic_add_unless(&bp->b_lru_ref, -1, 0)) { + list_move_tail(&bp->b_lru, &btp->bt_lru); + continue; + } + + /* + * remove the buffer from the LRU now to avoid needing another + * lock round trip inside xfs_buf_rele(). + */ + list_move(&bp->b_lru, &dispose); + btp->bt_lru_nr--; + } + spin_unlock(&btp->bt_lru_lock); + + while (!list_empty(&dispose)) { + bp = list_first_entry(&dispose, struct xfs_buf, b_lru); + list_del_init(&bp->b_lru); + xfs_buf_rele(bp); + } + + return btp->bt_lru_nr; } void @@ -1493,17 +1599,14 @@ xfs_free_buftarg( struct xfs_mount *mp, struct xfs_buftarg *btp) { + unregister_shrinker(&btp->bt_shrinker); + xfs_flush_buftarg(btp, 1); if (mp->m_flags & XFS_MOUNT_BARRIER) xfs_blkdev_issue_flush(btp); iput(btp->bt_mapping->host); - /* Unregister the buftarg first so that we don't get a - * wakeup finding a non-existent task - */ - xfs_unregister_buftarg(btp); kthread_stop(btp->bt_task); - kmem_free(btp); } @@ -1600,20 +1703,13 @@ xfs_alloc_delwrite_queue( xfs_buftarg_t *btp, const char *fsname) { - int error = 0; - - INIT_LIST_HEAD(&btp->bt_list); INIT_LIST_HEAD(&btp->bt_delwrite_queue); spin_lock_init(&btp->bt_delwrite_lock); btp->bt_flags = 0; btp->bt_task = kthread_run(xfsbufd, btp, "xfsbufd/%s", fsname); - if (IS_ERR(btp->bt_task)) { - error = PTR_ERR(btp->bt_task); - goto out_error; - } - xfs_register_buftarg(btp); -out_error: - return error; + if (IS_ERR(btp->bt_task)) + return PTR_ERR(btp->bt_task); + return 0; } xfs_buftarg_t * @@ -1630,12 +1726,17 @@ xfs_alloc_buftarg( btp->bt_mount = mp; btp->bt_dev = bdev->bd_dev; btp->bt_bdev = bdev; + INIT_LIST_HEAD(&btp->bt_lru); + spin_lock_init(&btp->bt_lru_lock); if (xfs_setsize_buftarg_early(btp, bdev)) goto error; if (xfs_mapping_buftarg(btp, bdev)) goto error; if (xfs_alloc_delwrite_queue(btp, fsname)) goto error; + btp->bt_shrinker.shrink = xfs_buftarg_shrink; + btp->bt_shrinker.seeks = DEFAULT_SEEKS; + register_shrinker(&btp->bt_shrinker); return btp; error: @@ -1740,27 +1841,6 @@ xfs_buf_runall_queues( flush_workqueue(queue); } -STATIC int -xfsbufd_wakeup( - struct shrinker *shrink, - int priority, - gfp_t mask) -{ - xfs_buftarg_t *btp; - - spin_lock(&xfs_buftarg_lock); - list_for_each_entry(btp, &xfs_buftarg_list, bt_list) { - if (test_bit(XBT_FORCE_SLEEP, &btp->bt_flags)) - continue; - if (list_empty(&btp->bt_delwrite_queue)) - continue; - set_bit(XBT_FORCE_FLUSH, &btp->bt_flags); - wake_up_process(btp->bt_task); - } - spin_unlock(&xfs_buftarg_lock); - return 0; -} - /* * Move as many buffers as specified to the supplied list * idicating if we skipped any buffers to prevent deadlocks. @@ -1781,7 +1861,6 @@ xfs_buf_delwri_split( INIT_LIST_HEAD(list); spin_lock(dwlk); list_for_each_entry_safe(bp, n, dwq, b_list) { - trace_xfs_buf_delwri_split(bp, _RET_IP_); ASSERT(bp->b_flags & XBF_DELWRI); if (!XFS_BUF_ISPINNED(bp) && !xfs_buf_cond_lock(bp)) { @@ -1795,6 +1874,7 @@ xfs_buf_delwri_split( _XBF_RUN_QUEUES); bp->b_flags |= XBF_WRITE; list_move_tail(&bp->b_list, list); + trace_xfs_buf_delwri_split(bp, _RET_IP_); } else skipped++; } @@ -1955,7 +2035,6 @@ xfs_buf_init(void) if (!xfsconvertd_workqueue) goto out_destroy_xfsdatad_workqueue; - register_shrinker(&xfs_buf_shake); return 0; out_destroy_xfsdatad_workqueue: @@ -1971,7 +2050,6 @@ xfs_buf_init(void) void xfs_buf_terminate(void) { - unregister_shrinker(&xfs_buf_shake); destroy_workqueue(xfsconvertd_workqueue); destroy_workqueue(xfsdatad_workqueue); destroy_workqueue(xfslogd_workqueue); diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index 383a3f3..a76c242 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -128,10 +128,15 @@ typedef struct xfs_buftarg { /* per device delwri queue */ struct task_struct *bt_task; - struct list_head bt_list; struct list_head bt_delwrite_queue; spinlock_t bt_delwrite_lock; unsigned long bt_flags; + + /* LRU control structures */ + struct shrinker bt_shrinker; + struct list_head bt_lru; + spinlock_t bt_lru_lock; + unsigned int bt_lru_nr; } xfs_buftarg_t; /* @@ -164,9 +169,11 @@ typedef struct xfs_buf { xfs_off_t b_file_offset; /* offset in file */ size_t b_buffer_length;/* size of buffer in bytes */ atomic_t b_hold; /* reference count */ + atomic_t b_lru_ref; /* lru reclaim ref count */ xfs_buf_flags_t b_flags; /* status flags */ struct semaphore b_sema; /* semaphore for lockables */ + struct list_head b_lru; /* lru list */ wait_queue_head_t b_waiters; /* unpin waiters */ struct list_head b_list; struct xfs_perag *b_pag; /* contains rbtree root */ @@ -264,7 +271,8 @@ extern void xfs_buf_terminate(void); #define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \ ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED)) -#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XBF_STALE) +void xfs_buf_stale(struct xfs_buf *bp); +#define XFS_BUF_STALE(bp) xfs_buf_stale(bp); #define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE) #define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE) #define XFS_BUF_SUPER_STALE(bp) do { \ @@ -328,9 +336,15 @@ extern void xfs_buf_terminate(void); #define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length) #define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt)) -#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0) +static inline void +xfs_buf_set_ref( + struct xfs_buf *bp, + int lru_ref) +{ + atomic_set(&bp->b_lru_ref, lru_ref); +} +#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) xfs_buf_set_ref(bp, ref) #define XFS_BUF_SET_VTYPE(bp, type) do { } while (0) -#define XFS_BUF_SET_REF(bp, ref) do { } while (0) #define XFS_BUF_ISPINNED(bp) atomic_read(&((bp)->b_pin_count)) diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c index 3764d74..fc0114d 100644 --- a/fs/xfs/linux-2.6/xfs_export.c +++ b/fs/xfs/linux-2.6/xfs_export.c @@ -70,8 +70,16 @@ xfs_fs_encode_fh( else fileid_type = FILEID_INO32_GEN_PARENT; - /* filesystem may contain 64bit inode numbers */ - if (!(XFS_M(inode->i_sb)->m_flags & XFS_MOUNT_SMALL_INUMS)) + /* + * If the the filesystem may contain 64bit inode numbers, we need + * to use larger file handles that can represent them. + * + * While we only allocate inodes that do not fit into 32 bits any + * large enough filesystem may contain them, thus the slightly + * confusing looking conditional below. + */ + if (!(XFS_M(inode->i_sb)->m_flags & XFS_MOUNT_SMALL_INUMS) || + (XFS_M(inode->i_sb)->m_flags & XFS_MOUNT_32BITINODES)) fileid_type |= XFS_FILEID_TYPE_64FLAG; /* diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index 2ea238f6..ad442d9 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -416,7 +416,7 @@ xfs_attrlist_by_handle( if (IS_ERR(dentry)) return PTR_ERR(dentry); - kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); + kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL); if (!kbuf) goto out_dput; diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 96107ef..94d5fd6 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -762,7 +762,8 @@ xfs_setup_inode( inode->i_state = I_NEW; inode_sb_list_add(inode); - insert_inode_hash(inode); + /* make the inode look hashed for the writeback code */ + hlist_add_fake(&inode->i_hash); inode->i_mode = ip->i_d.di_mode; inode->i_nlink = ip->i_d.di_nlink; diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index 214ddd7..0964949 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -37,7 +37,6 @@ #include <kmem.h> #include <mrlock.h> -#include <sv.h> #include <time.h> #include <support/debug.h> diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index cf80878..a10f641 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -353,9 +353,6 @@ xfs_parseargs( mp->m_qflags &= ~XFS_OQUOTA_ENFD; } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { mp->m_flags |= XFS_MOUNT_DELAYLOG; - cmn_err(CE_WARN, - "Enabling EXPERIMENTAL delayed logging feature " - "- use at your own risk.\n"); } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { mp->m_flags &= ~XFS_MOUNT_DELAYLOG; } else if (!strcmp(this_char, "ihashsize")) { @@ -837,8 +834,11 @@ xfsaild_wakeup( struct xfs_ail *ailp, xfs_lsn_t threshold_lsn) { - ailp->xa_target = threshold_lsn; - wake_up_process(ailp->xa_task); + /* only ever move the target forwards */ + if (XFS_LSN_CMP(threshold_lsn, ailp->xa_target) > 0) { + ailp->xa_target = threshold_lsn; + wake_up_process(ailp->xa_task); + } } STATIC int @@ -850,8 +850,17 @@ xfsaild( long tout = 0; /* milliseconds */ while (!kthread_should_stop()) { - schedule_timeout_interruptible(tout ? - msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); + /* + * for short sleeps indicating congestion, don't allow us to + * get woken early. Otherwise all we do is bang on the AIL lock + * without making progress. + */ + if (tout && tout <= 20) + __set_current_state(TASK_KILLABLE); + else + __set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(tout ? + msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); /* swsusp */ try_to_freeze(); @@ -938,7 +947,7 @@ out_reclaim: * Slab object creation initialisation for the XFS inode. * This covers only the idempotent fields in the XFS inode; * all other fields need to be initialised on allocation - * from the slab. This avoids the need to repeatedly intialise + * from the slab. This avoids the need to repeatedly initialise * fields in the xfs inode that left in the initialise state * when freeing the inode. */ @@ -1121,6 +1130,8 @@ xfs_fs_evict_inode( */ ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_reclaimable, "xfs_iolock_reclaimable"); xfs_inactive(ip); } @@ -1609,16 +1620,14 @@ xfs_fs_fill_super( goto out_free_sb; } -STATIC int -xfs_fs_get_sb( +STATIC struct dentry * +xfs_fs_mount( struct file_system_type *fs_type, int flags, const char *dev_name, - void *data, - struct vfsmount *mnt) + void *data) { - return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super, - mnt); + return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); } static const struct super_operations xfs_super_operations = { @@ -1639,7 +1648,7 @@ static const struct super_operations xfs_super_operations = { static struct file_system_type xfs_fs_type = { .owner = THIS_MODULE, .name = "xfs", - .get_sb = xfs_fs_get_sb, + .mount = xfs_fs_mount, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index 37d3325..a02480d 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -53,14 +53,30 @@ xfs_inode_ag_walk_grab( { struct inode *inode = VFS_I(ip); + ASSERT(rcu_read_lock_held()); + + /* + * check for stale RCU freed inode + * + * If the inode has been reallocated, it doesn't matter if it's not in + * the AG we are walking - we are walking for writeback, so if it + * passes all the "valid inode" checks and is dirty, then we'll write + * it back anyway. If it has been reallocated and still being + * initialised, the XFS_INEW check below will catch it. + */ + spin_lock(&ip->i_flags_lock); + if (!ip->i_ino) + goto out_unlock_noent; + + /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ + if (__xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) + goto out_unlock_noent; + spin_unlock(&ip->i_flags_lock); + /* nothing to sync during shutdown */ if (XFS_FORCED_SHUTDOWN(ip->i_mount)) return EFSCORRUPTED; - /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ - if (xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) - return ENOENT; - /* If we can't grab the inode, it must on it's way to reclaim. */ if (!igrab(inode)) return ENOENT; @@ -72,6 +88,10 @@ xfs_inode_ag_walk_grab( /* inode is valid */ return 0; + +out_unlock_noent: + spin_unlock(&ip->i_flags_lock); + return ENOENT; } STATIC int @@ -98,12 +118,12 @@ restart: int error = 0; int i; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH); if (!nr_found) { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); break; } @@ -118,18 +138,26 @@ restart: batch[i] = NULL; /* - * Update the index for the next lookup. Catch overflows - * into the next AG range which can occur if we have inodes - * in the last block of the AG and we are currently - * pointing to the last inode. + * Update the index for the next lookup. Catch + * overflows into the next AG range which can occur if + * we have inodes in the last block of the AG and we + * are currently pointing to the last inode. + * + * Because we may see inodes that are from the wrong AG + * due to RCU freeing and reallocation, only update the + * index if it lies in this AG. It was a race that lead + * us to see this inode, so another lookup from the + * same index will not find it again. */ + if (XFS_INO_TO_AGNO(mp, ip->i_ino) != pag->pag_agno) + continue; first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1); if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) done = 1; } /* unlock now we've grabbed the inodes. */ - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); for (i = 0; i < nr_found; i++) { if (!batch[i]) @@ -592,12 +620,12 @@ xfs_inode_set_reclaim_tag( struct xfs_perag *pag; pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); __xfs_inode_set_reclaim_tag(pag, ip); __xfs_iflags_set(ip, XFS_IRECLAIMABLE); spin_unlock(&ip->i_flags_lock); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); xfs_perag_put(pag); } @@ -639,9 +667,14 @@ xfs_reclaim_inode_grab( struct xfs_inode *ip, int flags) { + ASSERT(rcu_read_lock_held()); + + /* quick check for stale RCU freed inode */ + if (!ip->i_ino) + return 1; /* - * do some unlocked checks first to avoid unnecceary lock traffic. + * do some unlocked checks first to avoid unnecessary lock traffic. * The first is a flush lock check, the second is a already in reclaim * check. Only do these checks if we are not going to block on locks. */ @@ -654,11 +687,16 @@ xfs_reclaim_inode_grab( * The radix tree lock here protects a thread in xfs_iget from racing * with us starting reclaim on the inode. Once we have the * XFS_IRECLAIM flag set it will not touch us. + * + * Due to RCU lookup, we may find inodes that have been freed and only + * have XFS_IRECLAIM set. Indeed, we may see reallocated inodes that + * aren't candidates for reclaim at all, so we must check the + * XFS_IRECLAIMABLE is set first before proceeding to reclaim. */ spin_lock(&ip->i_flags_lock); - ASSERT_ALWAYS(__xfs_iflags_test(ip, XFS_IRECLAIMABLE)); - if (__xfs_iflags_test(ip, XFS_IRECLAIM)) { - /* ignore as it is already under reclaim */ + if (!__xfs_iflags_test(ip, XFS_IRECLAIMABLE) || + __xfs_iflags_test(ip, XFS_IRECLAIM)) { + /* not a reclaim candidate. */ spin_unlock(&ip->i_flags_lock); return 1; } @@ -795,12 +833,12 @@ reclaim: * added to the tree assert that it's been there before to catch * problems with the inode life time early on. */ - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); if (!radix_tree_delete(&pag->pag_ici_root, XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino))) ASSERT(0); __xfs_inode_clear_reclaim(pag, ip); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); /* * Here we do an (almost) spurious inode lock in order to coordinate @@ -853,6 +891,7 @@ restart: if (trylock) { if (!mutex_trylock(&pag->pag_ici_reclaim_lock)) { skipped++; + xfs_perag_put(pag); continue; } first_index = pag->pag_ici_reclaim_cursor; @@ -863,14 +902,14 @@ restart: struct xfs_inode *batch[XFS_LOOKUP_BATCH]; int i; - write_lock(&pag->pag_ici_lock); + rcu_read_lock(); nr_found = radix_tree_gang_lookup_tag( &pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH, XFS_ICI_RECLAIM_TAG); if (!nr_found) { - write_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); break; } @@ -890,14 +929,24 @@ restart: * occur if we have inodes in the last block of * the AG and we are currently pointing to the * last inode. + * + * Because we may see inodes that are from the + * wrong AG due to RCU freeing and + * reallocation, only update the index if it + * lies in this AG. It was a race that lead us + * to see this inode, so another lookup from + * the same index will not find it again. */ + if (XFS_INO_TO_AGNO(mp, ip->i_ino) != + pag->pag_agno) + continue; first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1); if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) done = 1; } /* unlock now we've grabbed the inodes. */ - write_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); for (i = 0; i < nr_found; i++) { if (!batch[i]) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index acef2e9..647af2a 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -766,8 +766,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __field(int, curr_res) __field(int, unit_res) __field(unsigned int, flags) - __field(void *, reserve_headq) - __field(void *, write_headq) + __field(int, reserveq) + __field(int, writeq) __field(int, grant_reserve_cycle) __field(int, grant_reserve_bytes) __field(int, grant_write_cycle) @@ -784,19 +784,21 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->curr_res = tic->t_curr_res; __entry->unit_res = tic->t_unit_res; __entry->flags = tic->t_flags; - __entry->reserve_headq = log->l_reserve_headq; - __entry->write_headq = log->l_write_headq; - __entry->grant_reserve_cycle = log->l_grant_reserve_cycle; - __entry->grant_reserve_bytes = log->l_grant_reserve_bytes; - __entry->grant_write_cycle = log->l_grant_write_cycle; - __entry->grant_write_bytes = log->l_grant_write_bytes; + __entry->reserveq = list_empty(&log->l_reserveq); + __entry->writeq = list_empty(&log->l_writeq); + xlog_crack_grant_head(&log->l_grant_reserve_head, + &__entry->grant_reserve_cycle, + &__entry->grant_reserve_bytes); + xlog_crack_grant_head(&log->l_grant_write_head, + &__entry->grant_write_cycle, + &__entry->grant_write_bytes); __entry->curr_cycle = log->l_curr_cycle; __entry->curr_block = log->l_curr_block; - __entry->tail_lsn = log->l_tail_lsn; + __entry->tail_lsn = atomic64_read(&log->l_tail_lsn); ), TP_printk("dev %d:%d type %s t_ocnt %u t_cnt %u t_curr_res %u " - "t_unit_res %u t_flags %s reserve_headq 0x%p " - "write_headq 0x%p grant_reserve_cycle %d " + "t_unit_res %u t_flags %s reserveq %s " + "writeq %s grant_reserve_cycle %d " "grant_reserve_bytes %d grant_write_cycle %d " "grant_write_bytes %d curr_cycle %d curr_block %d " "tail_cycle %d tail_block %d", @@ -807,8 +809,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->curr_res, __entry->unit_res, __print_flags(__entry->flags, "|", XLOG_TIC_FLAGS), - __entry->reserve_headq, - __entry->write_headq, + __entry->reserveq ? "empty" : "active", + __entry->writeq ? "empty" : "active", __entry->grant_reserve_cycle, __entry->grant_reserve_bytes, __entry->grant_write_cycle, @@ -835,6 +837,7 @@ DEFINE_LOGGRANT_EVENT(xfs_log_grant_sleep1); DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake1); DEFINE_LOGGRANT_EVENT(xfs_log_grant_sleep2); DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake2); +DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake_up); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_enter); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_exit); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_error); @@ -842,6 +845,7 @@ DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep1); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake1); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep2); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake2); +DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake_up); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_enter); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_exit); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_sub); @@ -935,10 +939,10 @@ DEFINE_PAGE_EVENT(xfs_writepage); DEFINE_PAGE_EVENT(xfs_releasepage); DEFINE_PAGE_EVENT(xfs_invalidatepage); -DECLARE_EVENT_CLASS(xfs_iomap_class, +DECLARE_EVENT_CLASS(xfs_imap_class, TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count, - int flags, struct xfs_bmbt_irec *irec), - TP_ARGS(ip, offset, count, flags, irec), + int type, struct xfs_bmbt_irec *irec), + TP_ARGS(ip, offset, count, type, irec), TP_STRUCT__entry( __field(dev_t, dev) __field(xfs_ino_t, ino) @@ -946,7 +950,7 @@ DECLARE_EVENT_CLASS(xfs_iomap_class, __field(loff_t, new_size) __field(loff_t, offset) __field(size_t, count) - __field(int, flags) + __field(int, type) __field(xfs_fileoff_t, startoff) __field(xfs_fsblock_t, startblock) __field(xfs_filblks_t, blockcount) @@ -958,13 +962,13 @@ DECLARE_EVENT_CLASS(xfs_iomap_class, __entry->new_size = ip->i_new_size; __entry->offset = offset; __entry->count = count; - __entry->flags = flags; + __entry->type = type; __entry->startoff = irec ? irec->br_startoff : 0; __entry->startblock = irec ? irec->br_startblock : 0; __entry->blockcount = irec ? irec->br_blockcount : 0; ), TP_printk("dev %d:%d ino 0x%llx size 0x%llx new_size 0x%llx " - "offset 0x%llx count %zd flags %s " + "offset 0x%llx count %zd type %s " "startoff 0x%llx startblock %lld blockcount 0x%llx", MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino, @@ -972,20 +976,21 @@ DECLARE_EVENT_CLASS(xfs_iomap_class, __entry->new_size, __entry->offset, __entry->count, - __print_flags(__entry->flags, "|", BMAPI_FLAGS), + __print_symbolic(__entry->type, XFS_IO_TYPES), __entry->startoff, (__int64_t)__entry->startblock, __entry->blockcount) ) #define DEFINE_IOMAP_EVENT(name) \ -DEFINE_EVENT(xfs_iomap_class, name, \ +DEFINE_EVENT(xfs_imap_class, name, \ TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count, \ - int flags, struct xfs_bmbt_irec *irec), \ - TP_ARGS(ip, offset, count, flags, irec)) -DEFINE_IOMAP_EVENT(xfs_iomap_enter); -DEFINE_IOMAP_EVENT(xfs_iomap_found); -DEFINE_IOMAP_EVENT(xfs_iomap_alloc); + int type, struct xfs_bmbt_irec *irec), \ + TP_ARGS(ip, offset, count, type, irec)) +DEFINE_IOMAP_EVENT(xfs_map_blocks_found); +DEFINE_IOMAP_EVENT(xfs_map_blocks_alloc); +DEFINE_IOMAP_EVENT(xfs_get_blocks_found); +DEFINE_IOMAP_EVENT(xfs_get_blocks_alloc); DECLARE_EVENT_CLASS(xfs_simple_io_class, TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count), @@ -1022,6 +1027,7 @@ DEFINE_EVENT(xfs_simple_io_class, name, \ TP_ARGS(ip, offset, count)) DEFINE_SIMPLE_IO_EVENT(xfs_delalloc_enospc); DEFINE_SIMPLE_IO_EVENT(xfs_unwritten_convert); +DEFINE_SIMPLE_IO_EVENT(xfs_get_blocks_notfound); TRACE_EVENT(xfs_itruncate_start, @@ -1420,6 +1426,7 @@ DEFINE_EVENT(xfs_alloc_class, name, \ TP_PROTO(struct xfs_alloc_arg *args), \ TP_ARGS(args)) DEFINE_ALLOC_EVENT(xfs_alloc_exact_done); +DEFINE_ALLOC_EVENT(xfs_alloc_exact_notfound); DEFINE_ALLOC_EVENT(xfs_alloc_exact_error); DEFINE_ALLOC_EVENT(xfs_alloc_near_nominleft); DEFINE_ALLOC_EVENT(xfs_alloc_near_first); diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c index faf8e1a..d22aa31 100644 --- a/fs/xfs/quota/xfs_dquot.c +++ b/fs/xfs/quota/xfs_dquot.c @@ -149,7 +149,6 @@ xfs_qm_dqdestroy( ASSERT(list_empty(&dqp->q_freelist)); mutex_destroy(&dqp->q_qlock); - sv_destroy(&dqp->q_pinwait); kmem_zone_free(xfs_Gqm->qm_dqzone, dqp); atomic_dec(&xfs_Gqm->qm_totaldquots); diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h index 0135e2a..11dd720 100644 --- a/fs/xfs/xfs_acl.h +++ b/fs/xfs/xfs_acl.h @@ -42,7 +42,7 @@ struct xfs_acl { #define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) #ifdef CONFIG_XFS_POSIX_ACL -extern int xfs_check_acl(struct inode *inode, int mask); +extern int xfs_check_acl(struct inode *inode, int mask, unsigned int flags); extern struct posix_acl *xfs_get_acl(struct inode *inode, int type); extern int xfs_inherit_acl(struct inode *inode, struct posix_acl *default_acl); extern int xfs_acl_chmod(struct inode *inode); diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 63c7a1a..58632cc 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -227,7 +227,7 @@ typedef struct xfs_perag { atomic_t pagf_fstrms; /* # of filestreams active in this AG */ - rwlock_t pag_ici_lock; /* incore inode lock */ + spinlock_t pag_ici_lock; /* incore inode cache lock */ struct radix_tree_root pag_ici_root; /* incore inode cache root */ int pag_ici_reclaimable; /* reclaimable inodes */ struct mutex pag_ici_reclaim_lock; /* serialisation point */ diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c index 112abc4..fa8723f 100644 --- a/fs/xfs/xfs_alloc.c +++ b/fs/xfs/xfs_alloc.c @@ -577,61 +577,58 @@ xfs_alloc_ag_vextent_exact( xfs_extlen_t rlen; /* length of returned extent */ ASSERT(args->alignment == 1); + /* * Allocate/initialize a cursor for the by-number freespace btree. */ bno_cur = xfs_allocbt_init_cursor(args->mp, args->tp, args->agbp, - args->agno, XFS_BTNUM_BNO); + args->agno, XFS_BTNUM_BNO); + /* * Lookup bno and minlen in the btree (minlen is irrelevant, really). * Look for the closest free block <= bno, it must contain bno * if any free block does. */ - if ((error = xfs_alloc_lookup_le(bno_cur, args->agbno, args->minlen, &i))) + error = xfs_alloc_lookup_le(bno_cur, args->agbno, args->minlen, &i); + if (error) goto error0; - if (!i) { - /* - * Didn't find it, return null. - */ - xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); - args->agbno = NULLAGBLOCK; - return 0; - } + if (!i) + goto not_found; + /* * Grab the freespace record. */ - if ((error = xfs_alloc_get_rec(bno_cur, &fbno, &flen, &i))) + error = xfs_alloc_get_rec(bno_cur, &fbno, &flen, &i); + if (error) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); ASSERT(fbno <= args->agbno); minend = args->agbno + args->minlen; maxend = args->agbno + args->maxlen; fend = fbno + flen; + /* * Give up if the freespace isn't long enough for the minimum request. */ - if (fend < minend) { - xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); - args->agbno = NULLAGBLOCK; - return 0; - } + if (fend < minend) + goto not_found; + /* * End of extent will be smaller of the freespace end and the * maximal requested end. - */ - end = XFS_AGBLOCK_MIN(fend, maxend); - /* + * * Fix the length according to mod and prod if given. */ + end = XFS_AGBLOCK_MIN(fend, maxend); args->len = end - args->agbno; xfs_alloc_fix_len(args); - if (!xfs_alloc_fix_minleft(args)) { - xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); - return 0; - } + if (!xfs_alloc_fix_minleft(args)) + goto not_found; + rlen = args->len; ASSERT(args->agbno + rlen <= fend); end = args->agbno + rlen; + /* * We are allocating agbno for rlen [agbno .. end] * Allocate/initialize a cursor for the by-size btree. @@ -640,16 +637,25 @@ xfs_alloc_ag_vextent_exact( args->agno, XFS_BTNUM_CNT); ASSERT(args->agbno + args->len <= be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_length)); - if ((error = xfs_alloc_fixup_trees(cnt_cur, bno_cur, fbno, flen, - args->agbno, args->len, XFSA_FIXUP_BNO_OK))) { + error = xfs_alloc_fixup_trees(cnt_cur, bno_cur, fbno, flen, args->agbno, + args->len, XFSA_FIXUP_BNO_OK); + if (error) { xfs_btree_del_cursor(cnt_cur, XFS_BTREE_ERROR); goto error0; } + xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); xfs_btree_del_cursor(cnt_cur, XFS_BTREE_NOERROR); - trace_xfs_alloc_exact_done(args); args->wasfromfl = 0; + trace_xfs_alloc_exact_done(args); + return 0; + +not_found: + /* Didn't find it, return null. */ + xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); + args->agbno = NULLAGBLOCK; + trace_xfs_alloc_exact_notfound(args); return 0; error0: @@ -659,6 +665,95 @@ error0: } /* + * Search the btree in a given direction via the search cursor and compare + * the records found against the good extent we've already found. + */ +STATIC int +xfs_alloc_find_best_extent( + struct xfs_alloc_arg *args, /* allocation argument structure */ + struct xfs_btree_cur **gcur, /* good cursor */ + struct xfs_btree_cur **scur, /* searching cursor */ + xfs_agblock_t gdiff, /* difference for search comparison */ + xfs_agblock_t *sbno, /* extent found by search */ + xfs_extlen_t *slen, + xfs_extlen_t *slena, /* aligned length */ + int dir) /* 0 = search right, 1 = search left */ +{ + xfs_agblock_t bno; + xfs_agblock_t new; + xfs_agblock_t sdiff; + int error; + int i; + + /* The good extent is perfect, no need to search. */ + if (!gdiff) + goto out_use_good; + + /* + * Look until we find a better one, run out of space or run off the end. + */ + do { + error = xfs_alloc_get_rec(*scur, sbno, slen, &i); + if (error) + goto error0; + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + xfs_alloc_compute_aligned(*sbno, *slen, args->alignment, + args->minlen, &bno, slena); + + /* + * The good extent is closer than this one. + */ + if (!dir) { + if (bno >= args->agbno + gdiff) + goto out_use_good; + } else { + if (bno <= args->agbno - gdiff) + goto out_use_good; + } + + /* + * Same distance, compare length and pick the best. + */ + if (*slena >= args->minlen) { + args->len = XFS_EXTLEN_MIN(*slena, args->maxlen); + xfs_alloc_fix_len(args); + + sdiff = xfs_alloc_compute_diff(args->agbno, args->len, + args->alignment, *sbno, + *slen, &new); + + /* + * Choose closer size and invalidate other cursor. + */ + if (sdiff < gdiff) + goto out_use_search; + goto out_use_good; + } + + if (!dir) + error = xfs_btree_increment(*scur, 0, &i); + else + error = xfs_btree_decrement(*scur, 0, &i); + if (error) + goto error0; + } while (i); + +out_use_good: + xfs_btree_del_cursor(*scur, XFS_BTREE_NOERROR); + *scur = NULL; + return 0; + +out_use_search: + xfs_btree_del_cursor(*gcur, XFS_BTREE_NOERROR); + *gcur = NULL; + return 0; + +error0: + /* caller invalidates cursors */ + return error; +} + +/* * Allocate a variable extent near bno in the allocation group agno. * Extent's length (returned in len) will be between minlen and maxlen, * and of the form k * prod + mod unless there's nothing that large. @@ -925,203 +1020,45 @@ xfs_alloc_ag_vextent_near( } } } while (bno_cur_lt || bno_cur_gt); + /* * Got both cursors still active, need to find better entry. */ if (bno_cur_lt && bno_cur_gt) { - /* - * Left side is long enough, look for a right side entry. - */ if (ltlena >= args->minlen) { /* - * Fix up the length. + * Left side is good, look for a right side entry. */ args->len = XFS_EXTLEN_MIN(ltlena, args->maxlen); xfs_alloc_fix_len(args); - rlen = args->len; - ltdiff = xfs_alloc_compute_diff(args->agbno, rlen, + ltdiff = xfs_alloc_compute_diff(args->agbno, args->len, args->alignment, ltbno, ltlen, <new); + + error = xfs_alloc_find_best_extent(args, + &bno_cur_lt, &bno_cur_gt, + ltdiff, >bno, >len, >lena, + 0 /* search right */); + } else { + ASSERT(gtlena >= args->minlen); + /* - * Not perfect. - */ - if (ltdiff) { - /* - * Look until we find a better one, run out of - * space, or run off the end. - */ - while (bno_cur_lt && bno_cur_gt) { - if ((error = xfs_alloc_get_rec( - bno_cur_gt, >bno, - >len, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - xfs_alloc_compute_aligned(gtbno, gtlen, - args->alignment, args->minlen, - >bnoa, >lena); - /* - * The left one is clearly better. - */ - if (gtbnoa >= args->agbno + ltdiff) { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - break; - } - /* - * If we reach a big enough entry, - * compare the two and pick the best. - */ - if (gtlena >= args->minlen) { - args->len = - XFS_EXTLEN_MIN(gtlena, - args->maxlen); - xfs_alloc_fix_len(args); - rlen = args->len; - gtdiff = xfs_alloc_compute_diff( - args->agbno, rlen, - args->alignment, - gtbno, gtlen, >new); - /* - * Right side is better. - */ - if (gtdiff < ltdiff) { - xfs_btree_del_cursor( - bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - } - /* - * Left side is better. - */ - else { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - } - break; - } - /* - * Fell off the right end. - */ - if ((error = xfs_btree_increment( - bno_cur_gt, 0, &i))) - goto error0; - if (!i) { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - break; - } - } - } - /* - * The left side is perfect, trash the right side. - */ - else { - xfs_btree_del_cursor(bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - } - } - /* - * It's the right side that was found first, look left. - */ - else { - /* - * Fix up the length. + * Right side is good, look for a left side entry. */ args->len = XFS_EXTLEN_MIN(gtlena, args->maxlen); xfs_alloc_fix_len(args); - rlen = args->len; - gtdiff = xfs_alloc_compute_diff(args->agbno, rlen, + gtdiff = xfs_alloc_compute_diff(args->agbno, args->len, args->alignment, gtbno, gtlen, >new); - /* - * Right side entry isn't perfect. - */ - if (gtdiff) { - /* - * Look until we find a better one, run out of - * space, or run off the end. - */ - while (bno_cur_lt && bno_cur_gt) { - if ((error = xfs_alloc_get_rec( - bno_cur_lt, <bno, - <len, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - xfs_alloc_compute_aligned(ltbno, ltlen, - args->alignment, args->minlen, - <bnoa, <lena); - /* - * The right one is clearly better. - */ - if (ltbnoa <= args->agbno - gtdiff) { - xfs_btree_del_cursor( - bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - break; - } - /* - * If we reach a big enough entry, - * compare the two and pick the best. - */ - if (ltlena >= args->minlen) { - args->len = XFS_EXTLEN_MIN( - ltlena, args->maxlen); - xfs_alloc_fix_len(args); - rlen = args->len; - ltdiff = xfs_alloc_compute_diff( - args->agbno, rlen, - args->alignment, - ltbno, ltlen, <new); - /* - * Left side is better. - */ - if (ltdiff < gtdiff) { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - } - /* - * Right side is better. - */ - else { - xfs_btree_del_cursor( - bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - } - break; - } - /* - * Fell off the left end. - */ - if ((error = xfs_btree_decrement( - bno_cur_lt, 0, &i))) - goto error0; - if (!i) { - xfs_btree_del_cursor(bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - break; - } - } - } - /* - * The right side is perfect, trash the left side. - */ - else { - xfs_btree_del_cursor(bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - } + + error = xfs_alloc_find_best_extent(args, + &bno_cur_gt, &bno_cur_lt, + gtdiff, <bno, <len, <lena, + 1 /* search left */); } + + if (error) + goto error0; } + /* * If we couldn't get anything, give up. */ @@ -1130,6 +1067,7 @@ xfs_alloc_ag_vextent_near( args->agbno = NULLAGBLOCK; return 0; } + /* * At this point we have selected a freespace entry, either to the * left or to the right. If it's on the right, copy all the @@ -1146,6 +1084,7 @@ xfs_alloc_ag_vextent_near( j = 1; } else j = 0; + /* * Fix up the length and compute the useful address. */ diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c index a6cff8e..71e90dc2 100644 --- a/fs/xfs/xfs_attr_leaf.c +++ b/fs/xfs/xfs_attr_leaf.c @@ -637,7 +637,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) * It didn't all fit, so we have to sort everything on hashval. */ sbsize = sf->hdr.count * sizeof(*sbuf); - sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP); + sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS); /* * Scan the attribute list for the rest of the entries, storing @@ -2386,7 +2386,7 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context) args.dp = context->dp; args.whichfork = XFS_ATTR_FORK; args.valuelen = valuelen; - args.value = kmem_alloc(valuelen, KM_SLEEP); + args.value = kmem_alloc(valuelen, KM_SLEEP | KM_NOFS); args.rmtblkno = be32_to_cpu(name_rmt->valueblk); args.rmtblkcnt = XFS_B_TO_FSB(args.dp->i_mount, valuelen); retval = xfs_attr_rmtval_get(&args); diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 8abd12e..4111cd3 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -5471,8 +5471,13 @@ xfs_getbmap( if (error) goto out_unlock_iolock; } - - ASSERT(ip->i_delayed_blks == 0); + /* + * even after flushing the inode, there can still be delalloc + * blocks on the inode beyond EOF due to speculative + * preallocation. These are not removed until the release + * function is called or the inode is inactivated. Hence we + * cannot assert here that ip->i_delayed_blks == 0. + */ } lock = xfs_ilock_map_shared(ip); @@ -6070,3 +6075,79 @@ xfs_bmap_disk_count_leaves( *count += xfs_bmbt_disk_get_blockcount(frp); } } + +/* + * dead simple method of punching delalyed allocation blocks from a range in + * the inode. Walks a block at a time so will be slow, but is only executed in + * rare error cases so the overhead is not critical. This will alays punch out + * both the start and end blocks, even if the ranges only partially overlap + * them, so it is up to the caller to ensure that partial blocks are not + * passed in. + */ +int +xfs_bmap_punch_delalloc_range( + struct xfs_inode *ip, + xfs_fileoff_t start_fsb, + xfs_fileoff_t length) +{ + xfs_fileoff_t remaining = length; + int error = 0; + + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); + + do { + int done; + xfs_bmbt_irec_t imap; + int nimaps = 1; + xfs_fsblock_t firstblock; + xfs_bmap_free_t flist; + + /* + * Map the range first and check that it is a delalloc extent + * before trying to unmap the range. Otherwise we will be + * trying to remove a real extent (which requires a + * transaction) or a hole, which is probably a bad idea... + */ + error = xfs_bmapi(NULL, ip, start_fsb, 1, + XFS_BMAPI_ENTIRE, NULL, 0, &imap, + &nimaps, NULL); + + if (error) { + /* something screwed, just bail */ + if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { + xfs_fs_cmn_err(CE_ALERT, ip->i_mount, + "Failed delalloc mapping lookup ino %lld fsb %lld.", + ip->i_ino, start_fsb); + } + break; + } + if (!nimaps) { + /* nothing there */ + goto next_block; + } + if (imap.br_startblock != DELAYSTARTBLOCK) { + /* been converted, ignore */ + goto next_block; + } + WARN_ON(imap.br_blockcount == 0); + + /* + * Note: while we initialise the firstblock/flist pair, they + * should never be used because blocks should never be + * allocated or freed for a delalloc extent and hence we need + * don't cancel or finish them after the xfs_bunmapi() call. + */ + xfs_bmap_init(&flist, &firstblock); + error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock, + &flist, &done); + if (error) + break; + + ASSERT(!flist.xbf_count && !flist.xbf_first); +next_block: + start_fsb++; + remaining--; + } while(remaining > 0); + + return error; +} diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h index 71ec9b6..3651191 100644 --- a/fs/xfs/xfs_bmap.h +++ b/fs/xfs/xfs_bmap.h @@ -394,6 +394,11 @@ xfs_bmap_count_blocks( int whichfork, int *count); +int +xfs_bmap_punch_delalloc_range( + struct xfs_inode *ip, + xfs_fileoff_t start_fsb, + xfs_fileoff_t length); #endif /* __KERNEL__ */ #endif /* __XFS_BMAP_H__ */ diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 04f9cca..2f9e97c 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -634,9 +634,8 @@ xfs_btree_read_bufl( return error; } ASSERT(!bp || !XFS_BUF_GETERROR(bp)); - if (bp != NULL) { + if (bp) XFS_BUF_SET_VTYPE_REF(bp, B_FS_MAP, refval); - } *bpp = bp; return 0; } @@ -944,13 +943,13 @@ xfs_btree_set_refs( switch (cur->bc_btnum) { case XFS_BTNUM_BNO: case XFS_BTNUM_CNT: - XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_MAP, XFS_ALLOC_BTREE_REF); + XFS_BUF_SET_VTYPE_REF(bp, B_FS_MAP, XFS_ALLOC_BTREE_REF); break; case XFS_BTNUM_INO: - XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_INOMAP, XFS_INO_BTREE_REF); + XFS_BUF_SET_VTYPE_REF(bp, B_FS_INOMAP, XFS_INO_BTREE_REF); break; case XFS_BTNUM_BMAP: - XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_MAP, XFS_BMAP_BTREE_REF); + XFS_BUF_SET_VTYPE_REF(bp, B_FS_MAP, XFS_BMAP_BTREE_REF); break; default: ASSERT(0); diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 2686d0d..ed2b65f 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -142,7 +142,7 @@ xfs_buf_item_log_check( #endif STATIC void xfs_buf_error_relse(xfs_buf_t *bp); -STATIC void xfs_buf_do_callbacks(xfs_buf_t *bp, xfs_log_item_t *lip); +STATIC void xfs_buf_do_callbacks(struct xfs_buf *bp); /* * This returns the number of log iovecs needed to log the @@ -450,7 +450,7 @@ xfs_buf_item_unpin( * xfs_trans_ail_delete() drops the AIL lock. */ if (bip->bli_flags & XFS_BLI_STALE_INODE) { - xfs_buf_do_callbacks(bp, (xfs_log_item_t *)bip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); } else { @@ -918,15 +918,26 @@ xfs_buf_attach_iodone( XFS_BUF_SET_IODONE_FUNC(bp, xfs_buf_iodone_callbacks); } +/* + * We can have many callbacks on a buffer. Running the callbacks individually + * can cause a lot of contention on the AIL lock, so we allow for a single + * callback to be able to scan the remaining lip->li_bio_list for other items + * of the same type and callback to be processed in the first call. + * + * As a result, the loop walking the callback list below will also modify the + * list. it removes the first item from the list and then runs the callback. + * The loop then restarts from the new head of the list. This allows the + * callback to scan and modify the list attached to the buffer and we don't + * have to care about maintaining a next item pointer. + */ STATIC void xfs_buf_do_callbacks( - xfs_buf_t *bp, - xfs_log_item_t *lip) + struct xfs_buf *bp) { - xfs_log_item_t *nlip; + struct xfs_log_item *lip; - while (lip != NULL) { - nlip = lip->li_bio_list; + while ((lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *)) != NULL) { + XFS_BUF_SET_FSPRIVATE(bp, lip->li_bio_list); ASSERT(lip->li_cb != NULL); /* * Clear the next pointer so we don't have any @@ -936,7 +947,6 @@ xfs_buf_do_callbacks( */ lip->li_bio_list = NULL; lip->li_cb(bp, lip); - lip = nlip; } } @@ -970,7 +980,7 @@ xfs_buf_iodone_callbacks( ASSERT(XFS_BUF_TARGET(bp) == mp->m_ddev_targp); XFS_BUF_SUPER_STALE(bp); trace_xfs_buf_item_iodone(bp, _RET_IP_); - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); xfs_buf_ioend(bp, 0); @@ -1029,7 +1039,7 @@ xfs_buf_iodone_callbacks( return; } - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); xfs_buf_ioend(bp, 0); @@ -1063,7 +1073,7 @@ xfs_buf_error_relse( * We have to unpin the pinned buffers so do the * callbacks. */ - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); XFS_BUF_SET_BRELSE_FUNC(bp,NULL); diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h index 0e2ed43..b6ecd20 100644 --- a/fs/xfs/xfs_buf_item.h +++ b/fs/xfs/xfs_buf_item.h @@ -105,17 +105,6 @@ typedef struct xfs_buf_log_item { xfs_buf_log_format_t bli_format; /* in-log header */ } xfs_buf_log_item_t; -/* - * This structure is used during recovery to record the buf log - * items which have been canceled and should not be replayed. - */ -typedef struct xfs_buf_cancel { - xfs_daddr_t bc_blkno; - uint bc_len; - int bc_refcount; - struct xfs_buf_cancel *bc_next; -} xfs_buf_cancel_t; - void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); void xfs_buf_item_relse(struct xfs_buf *); void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint); diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c index 3b9582c..e60490b 100644 --- a/fs/xfs/xfs_dfrag.c +++ b/fs/xfs/xfs_dfrag.c @@ -377,6 +377,19 @@ xfs_swap_extents( ip->i_d.di_format = tip->i_d.di_format; tip->i_d.di_format = tmp; + /* + * The extents in the source inode could still contain speculative + * preallocation beyond EOF (e.g. the file is open but not modified + * while defrag is in progress). In that case, we need to copy over the + * number of delalloc blocks the data fork in the source inode is + * tracking beyond EOF so that when the fork is truncated away when the + * temporary inode is unlinked we don't underrun the i_delayed_blks + * counter on that inode. + */ + ASSERT(tip->i_delayed_blks == 0); + tip->i_delayed_blks = ip->i_delayed_blks; + ip->i_delayed_blks = 0; + ilf_fields = XFS_ILOG_CORE; switch(ip->i_d.di_format) { diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c index ed99902..c78cc6a 100644 --- a/fs/xfs/xfs_error.c +++ b/fs/xfs/xfs_error.c @@ -58,6 +58,7 @@ xfs_error_trap(int e) int xfs_etest[XFS_NUM_INJECT_ERROR]; int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR]; char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR]; +int xfs_error_test_active; int xfs_error_test(int error_tag, int *fsidp, char *expression, @@ -108,6 +109,7 @@ xfs_errortag_add(int error_tag, xfs_mount_t *mp) len = strlen(mp->m_fsname); xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP); strcpy(xfs_etest_fsname[i], mp->m_fsname); + xfs_error_test_active++; return 0; } } @@ -137,6 +139,7 @@ xfs_errortag_clearall(xfs_mount_t *mp, int loud) xfs_etest_fsid[i] = 0LL; kmem_free(xfs_etest_fsname[i]); xfs_etest_fsname[i] = NULL; + xfs_error_test_active--; } } diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h index c2c1a07..f338847 100644 --- a/fs/xfs/xfs_error.h +++ b/fs/xfs/xfs_error.h @@ -127,13 +127,14 @@ extern void xfs_corruption_error(const char *tag, int level, #define XFS_RANDOM_BMAPIFORMAT XFS_RANDOM_DEFAULT #ifdef DEBUG +extern int xfs_error_test_active; extern int xfs_error_test(int, int *, char *, int, char *, unsigned long); #define XFS_NUM_INJECT_ERROR 10 #define XFS_TEST_ERROR(expr, mp, tag, rf) \ - ((expr) || \ + ((expr) || (xfs_error_test_active && \ xfs_error_test((tag), (mp)->m_fixedfsid, "expr", __LINE__, __FILE__, \ - (rf))) + (rf)))) extern int xfs_errortag_add(int error_tag, xfs_mount_t *mp); extern int xfs_errortag_clearall(xfs_mount_t *mp, int loud); diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c index a55e687..75f2ef6 100644 --- a/fs/xfs/xfs_extfree_item.c +++ b/fs/xfs/xfs_extfree_item.c @@ -48,6 +48,28 @@ xfs_efi_item_free( } /* + * Freeing the efi requires that we remove it from the AIL if it has already + * been placed there. However, the EFI may not yet have been placed in the AIL + * when called by xfs_efi_release() from EFD processing due to the ordering of + * committed vs unpin operations in bulk insert operations. Hence the + * test_and_clear_bit(XFS_EFI_COMMITTED) to ensure only the last caller frees + * the EFI. + */ +STATIC void +__xfs_efi_release( + struct xfs_efi_log_item *efip) +{ + struct xfs_ail *ailp = efip->efi_item.li_ailp; + + if (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { + spin_lock(&ailp->xa_lock); + /* xfs_trans_ail_delete() drops the AIL lock. */ + xfs_trans_ail_delete(ailp, &efip->efi_item); + xfs_efi_item_free(efip); + } +} + +/* * This returns the number of iovecs needed to log the given efi item. * We only need 1 iovec for an efi item. It just logs the efi_log_format * structure. @@ -74,7 +96,8 @@ xfs_efi_item_format( struct xfs_efi_log_item *efip = EFI_ITEM(lip); uint size; - ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); + ASSERT(atomic_read(&efip->efi_next_extent) == + efip->efi_format.efi_nextents); efip->efi_format.efi_type = XFS_LI_EFI; @@ -99,10 +122,12 @@ xfs_efi_item_pin( } /* - * While EFIs cannot really be pinned, the unpin operation is the - * last place at which the EFI is manipulated during a transaction. - * Here we coordinate with xfs_efi_cancel() to determine who gets to - * free the EFI. + * While EFIs cannot really be pinned, the unpin operation is the last place at + * which the EFI is manipulated during a transaction. If we are being asked to + * remove the EFI it's because the transaction has been cancelled and by + * definition that means the EFI cannot be in the AIL so remove it from the + * transaction and free it. Otherwise coordinate with xfs_efi_release() (via + * XFS_EFI_COMMITTED) to determine who gets to free the EFI. */ STATIC void xfs_efi_item_unpin( @@ -110,20 +135,14 @@ xfs_efi_item_unpin( int remove) { struct xfs_efi_log_item *efip = EFI_ITEM(lip); - struct xfs_ail *ailp = lip->li_ailp; - - spin_lock(&ailp->xa_lock); - if (efip->efi_flags & XFS_EFI_CANCELED) { - if (remove) - xfs_trans_del_item(lip); - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, lip); + if (remove) { + ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); + xfs_trans_del_item(lip); xfs_efi_item_free(efip); - } else { - efip->efi_flags |= XFS_EFI_COMMITTED; - spin_unlock(&ailp->xa_lock); + return; } + __xfs_efi_release(efip); } /* @@ -152,16 +171,20 @@ xfs_efi_item_unlock( } /* - * The EFI is logged only once and cannot be moved in the log, so - * simply return the lsn at which it's been logged. The canceled - * flag is not paid any attention here. Checking for that is delayed - * until the EFI is unpinned. + * The EFI is logged only once and cannot be moved in the log, so simply return + * the lsn at which it's been logged. For bulk transaction committed + * processing, the EFI may be processed but not yet unpinned prior to the EFD + * being processed. Set the XFS_EFI_COMMITTED flag so this case can be detected + * when processing the EFD. */ STATIC xfs_lsn_t xfs_efi_item_committed( struct xfs_log_item *lip, xfs_lsn_t lsn) { + struct xfs_efi_log_item *efip = EFI_ITEM(lip); + + set_bit(XFS_EFI_COMMITTED, &efip->efi_flags); return lsn; } @@ -230,6 +253,7 @@ xfs_efi_init( xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops); efip->efi_format.efi_nextents = nextents; efip->efi_format.efi_id = (__psint_t)(void*)efip; + atomic_set(&efip->efi_next_extent, 0); return efip; } @@ -289,37 +313,18 @@ xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) } /* - * This is called by the efd item code below to release references to - * the given efi item. Each efd calls this with the number of - * extents that it has logged, and when the sum of these reaches - * the total number of extents logged by this efi item we can free - * the efi item. - * - * Freeing the efi item requires that we remove it from the AIL. - * We'll use the AIL lock to protect our counters as well as - * the removal from the AIL. + * This is called by the efd item code below to release references to the given + * efi item. Each efd calls this with the number of extents that it has + * logged, and when the sum of these reaches the total number of extents logged + * by this efi item we can free the efi item. */ void xfs_efi_release(xfs_efi_log_item_t *efip, uint nextents) { - struct xfs_ail *ailp = efip->efi_item.li_ailp; - int extents_left; - - ASSERT(efip->efi_next_extent > 0); - ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); - - spin_lock(&ailp->xa_lock); - ASSERT(efip->efi_next_extent >= nextents); - efip->efi_next_extent -= nextents; - extents_left = efip->efi_next_extent; - if (extents_left == 0) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip); - xfs_efi_item_free(efip); - } else { - spin_unlock(&ailp->xa_lock); - } + ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); + if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) + __xfs_efi_release(efip); } static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip) diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h index 0d22c56..375f68e 100644 --- a/fs/xfs/xfs_extfree_item.h +++ b/fs/xfs/xfs_extfree_item.h @@ -111,11 +111,10 @@ typedef struct xfs_efd_log_format_64 { #define XFS_EFI_MAX_FAST_EXTENTS 16 /* - * Define EFI flags. + * Define EFI flag bits. Manipulated by set/clear/test_bit operators. */ -#define XFS_EFI_RECOVERED 0x1 -#define XFS_EFI_COMMITTED 0x2 -#define XFS_EFI_CANCELED 0x4 +#define XFS_EFI_RECOVERED 1 +#define XFS_EFI_COMMITTED 2 /* * This is the "extent free intention" log item. It is used @@ -125,8 +124,8 @@ typedef struct xfs_efd_log_format_64 { */ typedef struct xfs_efi_log_item { xfs_log_item_t efi_item; - uint efi_flags; /* misc flags */ - uint efi_next_extent; + atomic_t efi_next_extent; + unsigned long efi_flags; /* misc flags */ xfs_efi_log_format_t efi_format; } xfs_efi_log_item_t; diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c index 9b715dc..9124425 100644 --- a/fs/xfs/xfs_filestream.c +++ b/fs/xfs/xfs_filestream.c @@ -744,9 +744,15 @@ xfs_filestream_new_ag( * If the file's parent directory is known, take its iolock in exclusive * mode to prevent two sibling files from racing each other to migrate * themselves and their parent to different AGs. + * + * Note that we lock the parent directory iolock inside the child + * iolock here. That's fine as we never hold both parent and child + * iolock in any other place. This is different from the ilock, + * which requires locking of the child after the parent for namespace + * operations. */ if (pip) - xfs_ilock(pip, XFS_IOLOCK_EXCL); + xfs_ilock(pip, XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); /* * A new AG needs to be found for the file. If the file's parent diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index a7c116e..f56d30e 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -374,6 +374,7 @@ xfs_growfs_data_private( mp->m_maxicount = icount << mp->m_sb.sb_inopblog; } else mp->m_maxicount = 0; + xfs_set_low_space_thresholds(mp); /* update secondary superblocks. */ for (agno = 1; agno < nagcount; agno++) { diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 0cdd269..cb9b6d1 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -43,6 +43,17 @@ /* + * Define xfs inode iolock lockdep classes. We need to ensure that all active + * inodes are considered the same for lockdep purposes, including inodes that + * are recycled through the XFS_IRECLAIMABLE state. This is the the only way to + * guarantee the locks are considered the same when there are multiple lock + * initialisation siteѕ. Also, define a reclaimable inode class so it is + * obvious in lockdep reports which class the report is against. + */ +static struct lock_class_key xfs_iolock_active; +struct lock_class_key xfs_iolock_reclaimable; + +/* * Allocate and initialise an xfs_inode. */ STATIC struct xfs_inode * @@ -69,8 +80,11 @@ xfs_inode_alloc( ASSERT(atomic_read(&ip->i_pincount) == 0); ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); + ASSERT(ip->i_ino == 0); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_active, "xfs_iolock_active"); /* initialise the xfs inode */ ip->i_ino = ino; @@ -85,12 +99,20 @@ xfs_inode_alloc( ip->i_size = 0; ip->i_new_size = 0; - /* prevent anyone from using this yet */ - VFS_I(ip)->i_state = I_NEW; - return ip; } +STATIC void +xfs_inode_free_callback( + struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + struct xfs_inode *ip = XFS_I(inode); + + INIT_LIST_HEAD(&inode->i_dentry); + kmem_zone_free(xfs_inode_zone, ip); +} + void xfs_inode_free( struct xfs_inode *ip) @@ -134,7 +156,18 @@ xfs_inode_free( ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); - kmem_zone_free(xfs_inode_zone, ip); + /* + * Because we use RCU freeing we need to ensure the inode always + * appears to be reclaimed with an invalid inode number when in the + * free state. The ip->i_flags_lock provides the barrier against lookup + * races. + */ + spin_lock(&ip->i_flags_lock); + ip->i_flags = XFS_IRECLAIM; + ip->i_ino = 0; + spin_unlock(&ip->i_flags_lock); + + call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback); } /* @@ -144,14 +177,29 @@ static int xfs_iget_cache_hit( struct xfs_perag *pag, struct xfs_inode *ip, + xfs_ino_t ino, int flags, - int lock_flags) __releases(pag->pag_ici_lock) + int lock_flags) __releases(RCU) { struct inode *inode = VFS_I(ip); struct xfs_mount *mp = ip->i_mount; int error; + /* + * check for re-use of an inode within an RCU grace period due to the + * radix tree nodes not being updated yet. We monitor for this by + * setting the inode number to zero before freeing the inode structure. + * If the inode has been reallocated and set up, then the inode number + * will not match, so check for that, too. + */ spin_lock(&ip->i_flags_lock); + if (ip->i_ino != ino) { + trace_xfs_iget_skip(ip); + XFS_STATS_INC(xs_ig_frecycle); + error = EAGAIN; + goto out_error; + } + /* * If we are racing with another cache hit that is currently @@ -194,7 +242,7 @@ xfs_iget_cache_hit( ip->i_flags |= XFS_IRECLAIM; spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); error = -inode_init_always(mp->m_super, inode); if (error) { @@ -202,7 +250,7 @@ xfs_iget_cache_hit( * Re-initializing the inode failed, and we are in deep * trouble. Try to re-add it to the reclaim list. */ - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); spin_lock(&ip->i_flags_lock); ip->i_flags &= ~XFS_INEW; @@ -212,14 +260,20 @@ xfs_iget_cache_hit( goto out_error; } - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); ip->i_flags &= ~(XFS_IRECLAIMABLE | XFS_IRECLAIM); ip->i_flags |= XFS_INEW; __xfs_inode_clear_reclaim_tag(mp, pag, ip); inode->i_state = I_NEW; + + ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); + mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_active, "xfs_iolock_active"); + spin_unlock(&ip->i_flags_lock); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); } else { /* If the VFS inode is being torn down, pause and try again. */ if (!igrab(inode)) { @@ -230,7 +284,7 @@ xfs_iget_cache_hit( /* We've got a live one. */ spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); trace_xfs_iget_hit(ip); } @@ -244,7 +298,7 @@ xfs_iget_cache_hit( out_error: spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); return error; } @@ -297,7 +351,7 @@ xfs_iget_cache_miss( BUG(); } - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); /* insert the new inode */ error = radix_tree_insert(&pag->pag_ici_root, agino, ip); @@ -312,14 +366,14 @@ xfs_iget_cache_miss( ip->i_udquot = ip->i_gdquot = NULL; xfs_iflags_set(ip, XFS_INEW); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); *ipp = ip; return 0; out_preload_end: - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); if (lock_flags) xfs_iunlock(ip, lock_flags); @@ -366,7 +420,7 @@ xfs_iget( xfs_agino_t agino; /* reject inode numbers outside existing AGs */ - if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) return EINVAL; /* get the perag structure and ensure that it's inode capable */ @@ -375,15 +429,15 @@ xfs_iget( again: error = 0; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); ip = radix_tree_lookup(&pag->pag_ici_root, agino); if (ip) { - error = xfs_iget_cache_hit(pag, ip, flags, lock_flags); + error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags); if (error) goto out_error_or_again; } else { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); XFS_STATS_INC(xs_ig_missed); error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 108c7a0..be7cf62 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -887,7 +887,7 @@ xfs_iread( * around for a while. This helps to keep recently accessed * meta-data in-core longer. */ - XFS_BUF_SET_REF(bp, XFS_INO_REF); + xfs_buf_set_ref(bp, XFS_INO_REF); /* * Use xfs_trans_brelse() to release the buffer containing the @@ -2000,17 +2000,33 @@ xfs_ifree_cluster( */ for (i = 0; i < ninodes; i++) { retry: - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); ip = radix_tree_lookup(&pag->pag_ici_root, XFS_INO_TO_AGINO(mp, (inum + i))); - /* Inode not in memory or stale, nothing to do */ - if (!ip || xfs_iflags_test(ip, XFS_ISTALE)) { - read_unlock(&pag->pag_ici_lock); + /* Inode not in memory, nothing to do */ + if (!ip) { + rcu_read_unlock(); continue; } /* + * because this is an RCU protected lookup, we could + * find a recently freed or even reallocated inode + * during the lookup. We need to check under the + * i_flags_lock for a valid inode here. Skip it if it + * is not valid, the wrong inode or stale. + */ + spin_lock(&ip->i_flags_lock); + if (ip->i_ino != inum + i || + __xfs_iflags_test(ip, XFS_ISTALE)) { + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + continue; + } + spin_unlock(&ip->i_flags_lock); + + /* * Don't try to lock/unlock the current inode, but we * _cannot_ skip the other inodes that we did not find * in the list attached to the buffer and are not @@ -2019,11 +2035,11 @@ retry: */ if (ip != free_ip && !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); delay(1); goto retry; } - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); xfs_iflock(ip); xfs_iflags_set(ip, XFS_ISTALE); @@ -2629,7 +2645,7 @@ xfs_iflush_cluster( mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); /* really need a gang lookup range call here */ nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, first_index, inodes_per_cluster); @@ -2640,9 +2656,21 @@ xfs_iflush_cluster( iq = ilist[i]; if (iq == ip) continue; - /* if the inode lies outside this cluster, we're done. */ - if ((XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) - break; + + /* + * because this is an RCU protected lookup, we could find a + * recently freed or even reallocated inode during the lookup. + * We need to check under the i_flags_lock for a valid inode + * here. Skip it if it is not valid or the wrong inode. + */ + spin_lock(&ip->i_flags_lock); + if (!ip->i_ino || + (XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) { + spin_unlock(&ip->i_flags_lock); + continue; + } + spin_unlock(&ip->i_flags_lock); + /* * Do an un-protected check to see if the inode is dirty and * is a candidate for flushing. These checks will be repeated @@ -2692,7 +2720,7 @@ xfs_iflush_cluster( } out_free: - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); kmem_free(ilist); out_put: xfs_perag_put(pag); @@ -2704,7 +2732,7 @@ cluster_corrupt_out: * Corruption detected in the clustering loop. Invalidate the * inode buffer and shut down the filesystem. */ - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); /* * Clean up the buffer. If it was B_DELWRI, just release it -- * brelse can handle it with no problems. If not, shut down the diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index fb2ca2e..5c95fa8 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -376,12 +376,13 @@ static inline void xfs_ifunlock(xfs_inode_t *ip) /* * In-core inode flags. */ -#define XFS_IRECLAIM 0x0001 /* we have started reclaiming this inode */ -#define XFS_ISTALE 0x0002 /* inode has been staled */ -#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */ -#define XFS_INEW 0x0008 /* inode has just been allocated */ -#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */ -#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */ +#define XFS_IRECLAIM 0x0001 /* started reclaiming this inode */ +#define XFS_ISTALE 0x0002 /* inode has been staled */ +#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */ +#define XFS_INEW 0x0008 /* inode has just been allocated */ +#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */ +#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */ +#define XFS_IDIRTY_RELEASE 0x0040 /* dirty release already seen */ /* * Flags for inode locking. @@ -438,6 +439,8 @@ static inline void xfs_ifunlock(xfs_inode_t *ip) #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT) #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT) +extern struct lock_class_key xfs_iolock_reclaimable; + /* * Flags for xfs_itruncate_start(). */ diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index c7ac020..fd4f398 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -657,18 +657,37 @@ xfs_inode_item_unlock( } /* - * This is called to find out where the oldest active copy of the - * inode log item in the on disk log resides now that the last log - * write of it completed at the given lsn. Since we always re-log - * all dirty data in an inode, the latest copy in the on disk log - * is the only one that matters. Therefore, simply return the - * given lsn. + * This is called to find out where the oldest active copy of the inode log + * item in the on disk log resides now that the last log write of it completed + * at the given lsn. Since we always re-log all dirty data in an inode, the + * latest copy in the on disk log is the only one that matters. Therefore, + * simply return the given lsn. + * + * If the inode has been marked stale because the cluster is being freed, we + * don't want to (re-)insert this inode into the AIL. There is a race condition + * where the cluster buffer may be unpinned before the inode is inserted into + * the AIL during transaction committed processing. If the buffer is unpinned + * before the inode item has been committed and inserted, then it is possible + * for the buffer to be written and IO completions before the inode is inserted + * into the AIL. In that case, we'd be inserting a clean, stale inode into the + * AIL which will never get removed. It will, however, get reclaimed which + * triggers an assert in xfs_inode_free() complaining about freein an inode + * still in the AIL. + * + * To avoid this, return a lower LSN than the one passed in so that the + * transaction committed code will not move the inode forward in the AIL but + * will still unpin it properly. */ STATIC xfs_lsn_t xfs_inode_item_committed( struct xfs_log_item *lip, xfs_lsn_t lsn) { + struct xfs_inode_log_item *iip = INODE_ITEM(lip); + struct xfs_inode *ip = iip->ili_inode; + + if (xfs_iflags_test(ip, XFS_ISTALE)) + return lsn - 1; return lsn; } @@ -823,15 +842,64 @@ xfs_inode_item_destroy( * flushed to disk. It is responsible for removing the inode item * from the AIL if it has not been re-logged, and unlocking the inode's * flush lock. + * + * To reduce AIL lock traffic as much as possible, we scan the buffer log item + * list for other inodes that will run this function. We remove them from the + * buffer list so we can process all the inode IO completions in one AIL lock + * traversal. */ void xfs_iflush_done( struct xfs_buf *bp, struct xfs_log_item *lip) { - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - xfs_inode_t *ip = iip->ili_inode; + struct xfs_inode_log_item *iip; + struct xfs_log_item *blip; + struct xfs_log_item *next; + struct xfs_log_item *prev; struct xfs_ail *ailp = lip->li_ailp; + int need_ail = 0; + + /* + * Scan the buffer IO completions for other inodes being completed and + * attach them to the current inode log item. + */ + blip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *); + prev = NULL; + while (blip != NULL) { + if (lip->li_cb != xfs_iflush_done) { + prev = blip; + blip = blip->li_bio_list; + continue; + } + + /* remove from list */ + next = blip->li_bio_list; + if (!prev) { + XFS_BUF_SET_FSPRIVATE(bp, next); + } else { + prev->li_bio_list = next; + } + + /* add to current list */ + blip->li_bio_list = lip->li_bio_list; + lip->li_bio_list = blip; + + /* + * while we have the item, do the unlocked check for needing + * the AIL lock. + */ + iip = INODE_ITEM(blip); + if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) + need_ail++; + + blip = next; + } + + /* make sure we capture the state of the initial inode. */ + iip = INODE_ITEM(lip); + if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) + need_ail++; /* * We only want to pull the item from the AIL if it is @@ -842,28 +910,37 @@ xfs_iflush_done( * the lock since it's cheaper, and then we recheck while * holding the lock before removing the inode from the AIL. */ - if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) { + if (need_ail) { + struct xfs_log_item *log_items[need_ail]; + int i = 0; spin_lock(&ailp->xa_lock); - if (lip->li_lsn == iip->ili_flush_lsn) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, lip); - } else { - spin_unlock(&ailp->xa_lock); + for (blip = lip; blip; blip = blip->li_bio_list) { + iip = INODE_ITEM(blip); + if (iip->ili_logged && + blip->li_lsn == iip->ili_flush_lsn) { + log_items[i++] = blip; + } + ASSERT(i <= need_ail); } + /* xfs_trans_ail_delete_bulk() drops the AIL lock. */ + xfs_trans_ail_delete_bulk(ailp, log_items, i); } - iip->ili_logged = 0; /* - * Clear the ili_last_fields bits now that we know that the - * data corresponding to them is safely on disk. + * clean up and unlock the flush lock now we are done. We can clear the + * ili_last_fields bits now that we know that the data corresponding to + * them is safely on disk. */ - iip->ili_last_fields = 0; + for (blip = lip; blip; blip = next) { + next = blip->li_bio_list; + blip->li_bio_list = NULL; - /* - * Release the inode's flush lock since we're done with it. - */ - xfs_ifunlock(ip); + iip = INODE_ITEM(blip); + iip->ili_logged = 0; + iip->ili_last_fields = 0; + xfs_ifunlock(iip->ili_inode); + } } /* diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 2057614..55582bd 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -47,127 +47,8 @@ #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ << mp->m_writeio_log) -#define XFS_STRAT_WRITE_IMAPS 2 #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP -STATIC int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, - int, struct xfs_bmbt_irec *, int *); -STATIC int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int, - struct xfs_bmbt_irec *, int *); -STATIC int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t, - struct xfs_bmbt_irec *, int *); - -int -xfs_iomap( - struct xfs_inode *ip, - xfs_off_t offset, - ssize_t count, - int flags, - struct xfs_bmbt_irec *imap, - int *nimaps, - int *new) -{ - struct xfs_mount *mp = ip->i_mount; - xfs_fileoff_t offset_fsb, end_fsb; - int error = 0; - int lockmode = 0; - int bmapi_flags = 0; - - ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); - - *new = 0; - - if (XFS_FORCED_SHUTDOWN(mp)) - return XFS_ERROR(EIO); - - trace_xfs_iomap_enter(ip, offset, count, flags, NULL); - - switch (flags & (BMAPI_READ | BMAPI_WRITE | BMAPI_ALLOCATE)) { - case BMAPI_READ: - lockmode = xfs_ilock_map_shared(ip); - bmapi_flags = XFS_BMAPI_ENTIRE; - break; - case BMAPI_WRITE: - lockmode = XFS_ILOCK_EXCL; - if (flags & BMAPI_IGNSTATE) - bmapi_flags |= XFS_BMAPI_IGSTATE|XFS_BMAPI_ENTIRE; - xfs_ilock(ip, lockmode); - break; - case BMAPI_ALLOCATE: - lockmode = XFS_ILOCK_SHARED; - bmapi_flags = XFS_BMAPI_ENTIRE; - - /* Attempt non-blocking lock */ - if (flags & BMAPI_TRYLOCK) { - if (!xfs_ilock_nowait(ip, lockmode)) - return XFS_ERROR(EAGAIN); - } else { - xfs_ilock(ip, lockmode); - } - break; - default: - BUG(); - } - - ASSERT(offset <= mp->m_maxioffset); - if ((xfs_fsize_t)offset + count > mp->m_maxioffset) - count = mp->m_maxioffset - offset; - end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); - offset_fsb = XFS_B_TO_FSBT(mp, offset); - - error = xfs_bmapi(NULL, ip, offset_fsb, - (xfs_filblks_t)(end_fsb - offset_fsb), - bmapi_flags, NULL, 0, imap, - nimaps, NULL); - - if (error) - goto out; - - switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) { - case BMAPI_WRITE: - /* If we found an extent, return it */ - if (*nimaps && - (imap->br_startblock != HOLESTARTBLOCK) && - (imap->br_startblock != DELAYSTARTBLOCK)) { - trace_xfs_iomap_found(ip, offset, count, flags, imap); - break; - } - - if (flags & BMAPI_DIRECT) { - error = xfs_iomap_write_direct(ip, offset, count, flags, - imap, nimaps); - } else { - error = xfs_iomap_write_delay(ip, offset, count, flags, - imap, nimaps); - } - if (!error) { - trace_xfs_iomap_alloc(ip, offset, count, flags, imap); - } - *new = 1; - break; - case BMAPI_ALLOCATE: - /* If we found an extent, return it */ - xfs_iunlock(ip, lockmode); - lockmode = 0; - - if (*nimaps && !isnullstartblock(imap->br_startblock)) { - trace_xfs_iomap_found(ip, offset, count, flags, imap); - break; - } - - error = xfs_iomap_write_allocate(ip, offset, count, - imap, nimaps); - break; - } - - ASSERT(*nimaps <= 1); - -out: - if (lockmode) - xfs_iunlock(ip, lockmode); - return XFS_ERROR(error); -} - STATIC int xfs_iomap_eof_align_last_fsb( xfs_mount_t *mp, @@ -236,14 +117,13 @@ xfs_cmn_err_fsblock_zero( return EFSCORRUPTED; } -STATIC int +int xfs_iomap_write_direct( xfs_inode_t *ip, xfs_off_t offset, size_t count, - int flags, xfs_bmbt_irec_t *imap, - int *nmaps) + int nmaps) { xfs_mount_t *mp = ip->i_mount; xfs_fileoff_t offset_fsb; @@ -279,7 +159,7 @@ xfs_iomap_write_direct( if (error) goto error_out; } else { - if (*nmaps && (imap->br_startblock == HOLESTARTBLOCK)) + if (nmaps && (imap->br_startblock == HOLESTARTBLOCK)) last_fsb = MIN(last_fsb, (xfs_fileoff_t) imap->br_blockcount + imap->br_startoff); @@ -331,7 +211,7 @@ xfs_iomap_write_direct( xfs_trans_ijoin(tp, ip); bmapi_flag = XFS_BMAPI_WRITE; - if ((flags & BMAPI_DIRECT) && (offset < ip->i_size || extsz)) + if (offset < ip->i_size || extsz) bmapi_flag |= XFS_BMAPI_PREALLOC; /* @@ -370,7 +250,6 @@ xfs_iomap_write_direct( goto error_out; } - *nmaps = 1; return 0; error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ @@ -379,7 +258,6 @@ error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ error1: /* Just cancel transaction */ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); - *nmaps = 0; /* nothing set-up here */ error_out: return XFS_ERROR(error); @@ -389,6 +267,9 @@ error_out: * If the caller is doing a write at the end of the file, then extend the * allocation out to the file system's write iosize. We clean up any extra * space left over when the file is closed in xfs_inactive(). + * + * If we find we already have delalloc preallocation beyond EOF, don't do more + * preallocation as it it not needed. */ STATIC int xfs_iomap_eof_want_preallocate( @@ -396,7 +277,6 @@ xfs_iomap_eof_want_preallocate( xfs_inode_t *ip, xfs_off_t offset, size_t count, - int ioflag, xfs_bmbt_irec_t *imap, int nimaps, int *prealloc) @@ -405,6 +285,7 @@ xfs_iomap_eof_want_preallocate( xfs_filblks_t count_fsb; xfs_fsblock_t firstblock; int n, error, imaps; + int found_delalloc = 0; *prealloc = 0; if ((offset + count) <= ip->i_size) @@ -429,20 +310,66 @@ xfs_iomap_eof_want_preallocate( return 0; start_fsb += imap[n].br_blockcount; count_fsb -= imap[n].br_blockcount; + + if (imap[n].br_startblock == DELAYSTARTBLOCK) + found_delalloc = 1; } } - *prealloc = 1; + if (!found_delalloc) + *prealloc = 1; return 0; } -STATIC int +/* + * If we don't have a user specified preallocation size, dynamically increase + * the preallocation size as the size of the file grows. Cap the maximum size + * at a single extent or less if the filesystem is near full. The closer the + * filesystem is to full, the smaller the maximum prealocation. + */ +STATIC xfs_fsblock_t +xfs_iomap_prealloc_size( + struct xfs_mount *mp, + struct xfs_inode *ip) +{ + xfs_fsblock_t alloc_blocks = 0; + + if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { + int shift = 0; + int64_t freesp; + + alloc_blocks = XFS_B_TO_FSB(mp, ip->i_size); + alloc_blocks = XFS_FILEOFF_MIN(MAXEXTLEN, + rounddown_pow_of_two(alloc_blocks)); + + xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); + freesp = mp->m_sb.sb_fdblocks; + if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { + shift = 2; + if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) + shift++; + } + if (shift) + alloc_blocks >>= shift; + } + + if (alloc_blocks < mp->m_writeio_blocks) + alloc_blocks = mp->m_writeio_blocks; + + return alloc_blocks; +} + +int xfs_iomap_write_delay( xfs_inode_t *ip, xfs_off_t offset, size_t count, - int ioflag, - xfs_bmbt_irec_t *ret_imap, - int *nmaps) + xfs_bmbt_irec_t *ret_imap) { xfs_mount_t *mp = ip->i_mount; xfs_fileoff_t offset_fsb; @@ -469,16 +396,19 @@ xfs_iomap_write_delay( extsz = xfs_get_extsz_hint(ip); offset_fsb = XFS_B_TO_FSBT(mp, offset); + error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, - ioflag, imap, XFS_WRITE_IMAPS, &prealloc); + imap, XFS_WRITE_IMAPS, &prealloc); if (error) return error; retry: if (prealloc) { + xfs_fsblock_t alloc_blocks = xfs_iomap_prealloc_size(mp, ip); + aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); ioalign = XFS_B_TO_FSBT(mp, aligned_offset); - last_fsb = ioalign + mp->m_writeio_blocks; + last_fsb = ioalign + alloc_blocks; } else { last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); } @@ -496,22 +426,31 @@ retry: XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | XFS_BMAPI_ENTIRE, &firstblock, 1, imap, &nimaps, NULL); - if (error && (error != ENOSPC)) + switch (error) { + case 0: + case ENOSPC: + case EDQUOT: + break; + default: return XFS_ERROR(error); + } /* - * If bmapi returned us nothing, and if we didn't get back EDQUOT, - * then we must have run out of space - flush all other inodes with - * delalloc blocks and retry without EOF preallocation. + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For + * ENOSPC, * flush all other inodes with delalloc blocks to free up + * some of the excess reserved metadata space. For both cases, retry + * without EOF preallocation. */ if (nimaps == 0) { trace_xfs_delalloc_enospc(ip, offset, count); if (flushed) - return XFS_ERROR(ENOSPC); + return XFS_ERROR(error ? error : ENOSPC); - xfs_iunlock(ip, XFS_ILOCK_EXCL); - xfs_flush_inodes(ip); - xfs_ilock(ip, XFS_ILOCK_EXCL); + if (error == ENOSPC) { + xfs_iunlock(ip, XFS_ILOCK_EXCL); + xfs_flush_inodes(ip); + xfs_ilock(ip, XFS_ILOCK_EXCL); + } flushed = 1; error = 0; @@ -523,8 +462,6 @@ retry: return xfs_cmn_err_fsblock_zero(ip, &imap[0]); *ret_imap = imap[0]; - *nmaps = 1; - return 0; } @@ -538,13 +475,12 @@ retry: * We no longer bother to look at the incoming map - all we have to * guarantee is that whatever we allocate fills the required range. */ -STATIC int +int xfs_iomap_write_allocate( xfs_inode_t *ip, xfs_off_t offset, size_t count, - xfs_bmbt_irec_t *imap, - int *retmap) + xfs_bmbt_irec_t *imap) { xfs_mount_t *mp = ip->i_mount; xfs_fileoff_t offset_fsb, last_block; @@ -557,8 +493,6 @@ xfs_iomap_write_allocate( int error = 0; int nres; - *retmap = 0; - /* * Make sure that the dquots are there. */ @@ -680,7 +614,6 @@ xfs_iomap_write_allocate( if ((offset_fsb >= imap->br_startoff) && (offset_fsb < (imap->br_startoff + imap->br_blockcount))) { - *retmap = 1; XFS_STATS_INC(xs_xstrat_quick); return 0; } diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h index 7748a43..8061576 100644 --- a/fs/xfs/xfs_iomap.h +++ b/fs/xfs/xfs_iomap.h @@ -18,30 +18,15 @@ #ifndef __XFS_IOMAP_H__ #define __XFS_IOMAP_H__ -/* base extent manipulation calls */ -#define BMAPI_READ (1 << 0) /* read extents */ -#define BMAPI_WRITE (1 << 1) /* create extents */ -#define BMAPI_ALLOCATE (1 << 2) /* delayed allocate to real extents */ - -/* modifiers */ -#define BMAPI_IGNSTATE (1 << 4) /* ignore unwritten state on read */ -#define BMAPI_DIRECT (1 << 5) /* direct instead of buffered write */ -#define BMAPI_MMA (1 << 6) /* allocate for mmap write */ -#define BMAPI_TRYLOCK (1 << 7) /* non-blocking request */ - -#define BMAPI_FLAGS \ - { BMAPI_READ, "READ" }, \ - { BMAPI_WRITE, "WRITE" }, \ - { BMAPI_ALLOCATE, "ALLOCATE" }, \ - { BMAPI_IGNSTATE, "IGNSTATE" }, \ - { BMAPI_DIRECT, "DIRECT" }, \ - { BMAPI_TRYLOCK, "TRYLOCK" } - struct xfs_inode; struct xfs_bmbt_irec; -extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int, - struct xfs_bmbt_irec *, int *, int *); +extern int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *, int); +extern int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *); +extern int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *); extern int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, size_t); #endif /* __XFS_IOMAP_H__*/ diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index cee4ab9..0bf24b1 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -47,7 +47,7 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, xfs_daddr_t blk_offset, int num_bblks); -STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); +STATIC int xlog_space_left(struct log *log, atomic64_t *head); STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog); STATIC void xlog_dealloc_log(xlog_t *log); @@ -70,7 +70,7 @@ STATIC void xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog); /* local functions to manipulate grant head */ STATIC int xlog_grant_log_space(xlog_t *log, xlog_ticket_t *xtic); -STATIC void xlog_grant_push_ail(xfs_mount_t *mp, +STATIC void xlog_grant_push_ail(struct log *log, int need_bytes); STATIC void xlog_regrant_reserve_log_space(xlog_t *log, xlog_ticket_t *ticket); @@ -81,98 +81,73 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, #if defined(DEBUG) STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr); -STATIC void xlog_verify_grant_head(xlog_t *log, int equals); +STATIC void xlog_verify_grant_tail(struct log *log); STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog, int count, boolean_t syncing); STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, xfs_lsn_t tail_lsn); #else #define xlog_verify_dest_ptr(a,b) -#define xlog_verify_grant_head(a,b) +#define xlog_verify_grant_tail(a) #define xlog_verify_iclog(a,b,c,d) #define xlog_verify_tail_lsn(a,b,c) #endif STATIC int xlog_iclogs_empty(xlog_t *log); - static void -xlog_ins_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic) +xlog_grant_sub_space( + struct log *log, + atomic64_t *head, + int bytes) { - if (*qp) { - tic->t_next = (*qp); - tic->t_prev = (*qp)->t_prev; - (*qp)->t_prev->t_next = tic; - (*qp)->t_prev = tic; - } else { - tic->t_prev = tic->t_next = tic; - *qp = tic; - } + int64_t head_val = atomic64_read(head); + int64_t new, old; - tic->t_flags |= XLOG_TIC_IN_Q; -} + do { + int cycle, space; -static void -xlog_del_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic) -{ - if (tic == tic->t_next) { - *qp = NULL; - } else { - *qp = tic->t_next; - tic->t_next->t_prev = tic->t_prev; - tic->t_prev->t_next = tic->t_next; - } + xlog_crack_grant_head_val(head_val, &cycle, &space); - tic->t_next = tic->t_prev = NULL; - tic->t_flags &= ~XLOG_TIC_IN_Q; + space -= bytes; + if (space < 0) { + space += log->l_logsize; + cycle--; + } + + old = head_val; + new = xlog_assign_grant_head_val(cycle, space); + head_val = atomic64_cmpxchg(head, old, new); + } while (head_val != old); } static void -xlog_grant_sub_space(struct log *log, int bytes) +xlog_grant_add_space( + struct log *log, + atomic64_t *head, + int bytes) { - log->l_grant_write_bytes -= bytes; - if (log->l_grant_write_bytes < 0) { - log->l_grant_write_bytes += log->l_logsize; - log->l_grant_write_cycle--; - } - - log->l_grant_reserve_bytes -= bytes; - if ((log)->l_grant_reserve_bytes < 0) { - log->l_grant_reserve_bytes += log->l_logsize; - log->l_grant_reserve_cycle--; - } + int64_t head_val = atomic64_read(head); + int64_t new, old; -} + do { + int tmp; + int cycle, space; -static void -xlog_grant_add_space_write(struct log *log, int bytes) -{ - int tmp = log->l_logsize - log->l_grant_write_bytes; - if (tmp > bytes) - log->l_grant_write_bytes += bytes; - else { - log->l_grant_write_cycle++; - log->l_grant_write_bytes = bytes - tmp; - } -} + xlog_crack_grant_head_val(head_val, &cycle, &space); -static void -xlog_grant_add_space_reserve(struct log *log, int bytes) -{ - int tmp = log->l_logsize - log->l_grant_reserve_bytes; - if (tmp > bytes) - log->l_grant_reserve_bytes += bytes; - else { - log->l_grant_reserve_cycle++; - log->l_grant_reserve_bytes = bytes - tmp; - } -} + tmp = log->l_logsize - space; + if (tmp > bytes) + space += bytes; + else { + space = bytes - tmp; + cycle++; + } -static inline void -xlog_grant_add_space(struct log *log, int bytes) -{ - xlog_grant_add_space_write(log, bytes); - xlog_grant_add_space_reserve(log, bytes); + old = head_val; + new = xlog_assign_grant_head_val(cycle, space); + head_val = atomic64_cmpxchg(head, old, new); + } while (head_val != old); } static void @@ -355,7 +330,7 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - xlog_grant_push_ail(mp, internal_ticket->t_unit_res); + xlog_grant_push_ail(log, internal_ticket->t_unit_res); retval = xlog_regrant_write_log_space(log, internal_ticket); } else { /* may sleep if need to allocate more tickets */ @@ -369,7 +344,7 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - xlog_grant_push_ail(mp, + xlog_grant_push_ail(log, (internal_ticket->t_unit_res * internal_ticket->t_cnt)); retval = xlog_grant_log_space(log, internal_ticket); @@ -584,8 +559,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) if (!(iclog->ic_state == XLOG_STATE_ACTIVE || iclog->ic_state == XLOG_STATE_DIRTY)) { if (!XLOG_FORCED_SHUTDOWN(log)) { - sv_wait(&iclog->ic_force_wait, PMEM, - &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, + &log->l_icloglock); } else { spin_unlock(&log->l_icloglock); } @@ -625,8 +600,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) || iclog->ic_state == XLOG_STATE_DIRTY || iclog->ic_state == XLOG_STATE_IOERROR) ) { - sv_wait(&iclog->ic_force_wait, PMEM, - &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, + &log->l_icloglock); } else { spin_unlock(&log->l_icloglock); } @@ -703,55 +678,46 @@ xfs_log_move_tail(xfs_mount_t *mp, { xlog_ticket_t *tic; xlog_t *log = mp->m_log; - int need_bytes, free_bytes, cycle, bytes; + int need_bytes, free_bytes; if (XLOG_FORCED_SHUTDOWN(log)) return; - if (tail_lsn == 0) { - /* needed since sync_lsn is 64 bits */ - spin_lock(&log->l_icloglock); - tail_lsn = log->l_last_sync_lsn; - spin_unlock(&log->l_icloglock); - } - - spin_lock(&log->l_grant_lock); + if (tail_lsn == 0) + tail_lsn = atomic64_read(&log->l_last_sync_lsn); - /* Also an invalid lsn. 1 implies that we aren't passing in a valid - * tail_lsn. - */ - if (tail_lsn != 1) { - log->l_tail_lsn = tail_lsn; - } + /* tail_lsn == 1 implies that we weren't passed a valid value. */ + if (tail_lsn != 1) + atomic64_set(&log->l_tail_lsn, tail_lsn); - if ((tic = log->l_write_headq)) { + if (!list_empty_careful(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif - cycle = log->l_grant_write_cycle; - bytes = log->l_grant_write_bytes; - free_bytes = xlog_space_left(log, cycle, bytes); - do { + spin_lock(&log->l_grant_write_lock); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); + list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); if (free_bytes < tic->t_unit_res && tail_lsn != 1) break; tail_lsn = 0; free_bytes -= tic->t_unit_res; - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_write_headq); + trace_xfs_log_regrant_write_wake_up(log, tic); + wake_up(&tic->t_wait); + } + spin_unlock(&log->l_grant_write_lock); } - if ((tic = log->l_reserve_headq)) { + + if (!list_empty_careful(&log->l_reserveq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif - cycle = log->l_grant_reserve_cycle; - bytes = log->l_grant_reserve_bytes; - free_bytes = xlog_space_left(log, cycle, bytes); - do { + spin_lock(&log->l_grant_reserve_lock); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); + list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) need_bytes = tic->t_unit_res*tic->t_cnt; else @@ -760,12 +726,12 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= need_bytes; - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_reserve_headq); + trace_xfs_log_grant_wake_up(log, tic); + wake_up(&tic->t_wait); + } + spin_unlock(&log->l_grant_reserve_lock); } - spin_unlock(&log->l_grant_lock); -} /* xfs_log_move_tail */ +} /* * Determine if we have a transaction that has gone to disk @@ -831,23 +797,19 @@ xfs_log_need_covered(xfs_mount_t *mp) * We may be holding the log iclog lock upon entering this routine. */ xfs_lsn_t -xlog_assign_tail_lsn(xfs_mount_t *mp) +xlog_assign_tail_lsn( + struct xfs_mount *mp) { - xfs_lsn_t tail_lsn; - xlog_t *log = mp->m_log; + xfs_lsn_t tail_lsn; + struct log *log = mp->m_log; tail_lsn = xfs_trans_ail_tail(mp->m_ail); - spin_lock(&log->l_grant_lock); - if (tail_lsn != 0) { - log->l_tail_lsn = tail_lsn; - } else { - tail_lsn = log->l_tail_lsn = log->l_last_sync_lsn; - } - spin_unlock(&log->l_grant_lock); + if (!tail_lsn) + tail_lsn = atomic64_read(&log->l_last_sync_lsn); + atomic64_set(&log->l_tail_lsn, tail_lsn); return tail_lsn; -} /* xlog_assign_tail_lsn */ - +} /* * Return the space in the log between the tail and the head. The head @@ -864,21 +826,26 @@ xlog_assign_tail_lsn(xfs_mount_t *mp) * result is that we return the size of the log as the amount of space left. */ STATIC int -xlog_space_left(xlog_t *log, int cycle, int bytes) -{ - int free_bytes; - int tail_bytes; - int tail_cycle; - - tail_bytes = BBTOB(BLOCK_LSN(log->l_tail_lsn)); - tail_cycle = CYCLE_LSN(log->l_tail_lsn); - if ((tail_cycle == cycle) && (bytes >= tail_bytes)) { - free_bytes = log->l_logsize - (bytes - tail_bytes); - } else if ((tail_cycle + 1) < cycle) { +xlog_space_left( + struct log *log, + atomic64_t *head) +{ + int free_bytes; + int tail_bytes; + int tail_cycle; + int head_cycle; + int head_bytes; + + xlog_crack_grant_head(head, &head_cycle, &head_bytes); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_bytes); + tail_bytes = BBTOB(tail_bytes); + if (tail_cycle == head_cycle && head_bytes >= tail_bytes) + free_bytes = log->l_logsize - (head_bytes - tail_bytes); + else if (tail_cycle + 1 < head_cycle) return 0; - } else if (tail_cycle < cycle) { - ASSERT(tail_cycle == (cycle - 1)); - free_bytes = tail_bytes - bytes; + else if (tail_cycle < head_cycle) { + ASSERT(tail_cycle == (head_cycle - 1)); + free_bytes = tail_bytes - head_bytes; } else { /* * The reservation head is behind the tail. @@ -889,12 +856,12 @@ xlog_space_left(xlog_t *log, int cycle, int bytes) "xlog_space_left: head behind tail\n" " tail_cycle = %d, tail_bytes = %d\n" " GH cycle = %d, GH bytes = %d", - tail_cycle, tail_bytes, cycle, bytes); + tail_cycle, tail_bytes, head_cycle, head_bytes); ASSERT(0); free_bytes = log->l_logsize; } return free_bytes; -} /* xlog_space_left */ +} /* @@ -1047,12 +1014,16 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_flags |= XLOG_ACTIVE_RECOVERY; log->l_prev_block = -1; - log->l_tail_lsn = xlog_assign_lsn(1, 0); /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ - log->l_last_sync_lsn = log->l_tail_lsn; + xlog_assign_atomic_lsn(&log->l_tail_lsn, 1, 0); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, 1, 0); log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ - log->l_grant_reserve_cycle = 1; - log->l_grant_write_cycle = 1; + xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); + xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); + INIT_LIST_HEAD(&log->l_reserveq); + INIT_LIST_HEAD(&log->l_writeq); + spin_lock_init(&log->l_grant_reserve_lock); + spin_lock_init(&log->l_grant_write_lock); error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { @@ -1094,8 +1065,7 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_xbuf = bp; spin_lock_init(&log->l_icloglock); - spin_lock_init(&log->l_grant_lock); - sv_init(&log->l_flush_wait, 0, "flush_wait"); + init_waitqueue_head(&log->l_flush_wait); /* log record size must be multiple of BBSIZE; see xlog_rec_header_t */ ASSERT((XFS_BUF_SIZE(bp) & BBMASK) == 0); @@ -1151,8 +1121,8 @@ xlog_alloc_log(xfs_mount_t *mp, ASSERT(XFS_BUF_ISBUSY(iclog->ic_bp)); ASSERT(XFS_BUF_VALUSEMA(iclog->ic_bp) <= 0); - sv_init(&iclog->ic_force_wait, SV_DEFAULT, "iclog-force"); - sv_init(&iclog->ic_write_wait, SV_DEFAULT, "iclog-write"); + init_waitqueue_head(&iclog->ic_force_wait); + init_waitqueue_head(&iclog->ic_write_wait); iclogp = &iclog->ic_next; } @@ -1167,15 +1137,11 @@ xlog_alloc_log(xfs_mount_t *mp, out_free_iclog: for (iclog = log->l_iclog; iclog; iclog = prev_iclog) { prev_iclog = iclog->ic_next; - if (iclog->ic_bp) { - sv_destroy(&iclog->ic_force_wait); - sv_destroy(&iclog->ic_write_wait); + if (iclog->ic_bp) xfs_buf_free(iclog->ic_bp); - } kmem_free(iclog); } spinlock_destroy(&log->l_icloglock); - spinlock_destroy(&log->l_grant_lock); xfs_buf_free(log->l_xbuf); out_free_log: kmem_free(log); @@ -1223,61 +1189,60 @@ xlog_commit_record( * water mark. In this manner, we would be creating a low water mark. */ STATIC void -xlog_grant_push_ail(xfs_mount_t *mp, - int need_bytes) +xlog_grant_push_ail( + struct log *log, + int need_bytes) { - xlog_t *log = mp->m_log; /* pointer to the log */ - xfs_lsn_t tail_lsn; /* lsn of the log tail */ - xfs_lsn_t threshold_lsn = 0; /* lsn we'd like to be at */ - int free_blocks; /* free blocks left to write to */ - int free_bytes; /* free bytes left to write to */ - int threshold_block; /* block in lsn we'd like to be at */ - int threshold_cycle; /* lsn cycle we'd like to be at */ - int free_threshold; - - ASSERT(BTOBB(need_bytes) < log->l_logBBsize); - - spin_lock(&log->l_grant_lock); - free_bytes = xlog_space_left(log, - log->l_grant_reserve_cycle, - log->l_grant_reserve_bytes); - tail_lsn = log->l_tail_lsn; - free_blocks = BTOBBT(free_bytes); - - /* - * Set the threshold for the minimum number of free blocks in the - * log to the maximum of what the caller needs, one quarter of the - * log, and 256 blocks. - */ - free_threshold = BTOBB(need_bytes); - free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2)); - free_threshold = MAX(free_threshold, 256); - if (free_blocks < free_threshold) { - threshold_block = BLOCK_LSN(tail_lsn) + free_threshold; - threshold_cycle = CYCLE_LSN(tail_lsn); + xfs_lsn_t threshold_lsn = 0; + xfs_lsn_t last_sync_lsn; + int free_blocks; + int free_bytes; + int threshold_block; + int threshold_cycle; + int free_threshold; + + ASSERT(BTOBB(need_bytes) < log->l_logBBsize); + + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); + free_blocks = BTOBBT(free_bytes); + + /* + * Set the threshold for the minimum number of free blocks in the + * log to the maximum of what the caller needs, one quarter of the + * log, and 256 blocks. + */ + free_threshold = BTOBB(need_bytes); + free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2)); + free_threshold = MAX(free_threshold, 256); + if (free_blocks >= free_threshold) + return; + + xlog_crack_atomic_lsn(&log->l_tail_lsn, &threshold_cycle, + &threshold_block); + threshold_block += free_threshold; if (threshold_block >= log->l_logBBsize) { - threshold_block -= log->l_logBBsize; - threshold_cycle += 1; + threshold_block -= log->l_logBBsize; + threshold_cycle += 1; } - threshold_lsn = xlog_assign_lsn(threshold_cycle, threshold_block); + threshold_lsn = xlog_assign_lsn(threshold_cycle, + threshold_block); + /* + * Don't pass in an lsn greater than the lsn of the last + * log record known to be on disk. Use a snapshot of the last sync lsn + * so that it doesn't change between the compare and the set. + */ + last_sync_lsn = atomic64_read(&log->l_last_sync_lsn); + if (XFS_LSN_CMP(threshold_lsn, last_sync_lsn) > 0) + threshold_lsn = last_sync_lsn; - /* Don't pass in an lsn greater than the lsn of the last - * log record known to be on disk. + /* + * Get the transaction layer to kick the dirty buffers out to + * disk asynchronously. No point in trying to do this if + * the filesystem is shutting down. */ - if (XFS_LSN_CMP(threshold_lsn, log->l_last_sync_lsn) > 0) - threshold_lsn = log->l_last_sync_lsn; - } - spin_unlock(&log->l_grant_lock); - - /* - * Get the transaction layer to kick the dirty buffers out to - * disk asynchronously. No point in trying to do this if - * the filesystem is shutting down. - */ - if (threshold_lsn && - !XLOG_FORCED_SHUTDOWN(log)) - xfs_trans_ail_push(log->l_ailp, threshold_lsn); -} /* xlog_grant_push_ail */ + if (!XLOG_FORCED_SHUTDOWN(log)) + xfs_trans_ail_push(log->l_ailp, threshold_lsn); +} /* * The bdstrat callback function for log bufs. This gives us a central @@ -1372,9 +1337,8 @@ xlog_sync(xlog_t *log, roundoff < BBTOB(1))); /* move grant heads by roundoff in sync */ - spin_lock(&log->l_grant_lock); - xlog_grant_add_space(log, roundoff); - spin_unlock(&log->l_grant_lock); + xlog_grant_add_space(log, &log->l_grant_reserve_head, roundoff); + xlog_grant_add_space(log, &log->l_grant_write_head, roundoff); /* put cycle number in every block */ xlog_pack_data(log, iclog, roundoff); @@ -1489,15 +1453,12 @@ xlog_dealloc_log(xlog_t *log) iclog = log->l_iclog; for (i=0; i<log->l_iclog_bufs; i++) { - sv_destroy(&iclog->ic_force_wait); - sv_destroy(&iclog->ic_write_wait); xfs_buf_free(iclog->ic_bp); next_iclog = iclog->ic_next; kmem_free(iclog); iclog = next_iclog; } spinlock_destroy(&log->l_icloglock); - spinlock_destroy(&log->l_grant_lock); xfs_buf_free(log->l_xbuf); log->l_mp->m_log = NULL; @@ -2232,7 +2193,7 @@ xlog_state_do_callback( lowest_lsn = xlog_get_lowest_lsn(log); if (lowest_lsn && XFS_LSN_CMP(lowest_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)) < 0) { + be64_to_cpu(iclog->ic_header.h_lsn)) < 0) { iclog = iclog->ic_next; continue; /* Leave this iclog for * another thread */ @@ -2240,23 +2201,21 @@ xlog_state_do_callback( iclog->ic_state = XLOG_STATE_CALLBACK; - spin_unlock(&log->l_icloglock); - /* l_last_sync_lsn field protected by - * l_grant_lock. Don't worry about iclog's lsn. - * No one else can be here except us. + /* + * update the last_sync_lsn before we drop the + * icloglock to ensure we are the only one that + * can update it. */ - spin_lock(&log->l_grant_lock); - ASSERT(XFS_LSN_CMP(log->l_last_sync_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); - log->l_last_sync_lsn = - be64_to_cpu(iclog->ic_header.h_lsn); - spin_unlock(&log->l_grant_lock); + ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn), + be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); + atomic64_set(&log->l_last_sync_lsn, + be64_to_cpu(iclog->ic_header.h_lsn)); - } else { - spin_unlock(&log->l_icloglock); + } else ioerrors++; - } + + spin_unlock(&log->l_icloglock); /* * Keep processing entries in the callback list until @@ -2297,7 +2256,7 @@ xlog_state_do_callback( xlog_state_clean_log(log); /* wake up threads waiting in xfs_log_force() */ - sv_broadcast(&iclog->ic_force_wait); + wake_up_all(&iclog->ic_force_wait); iclog = iclog->ic_next; } while (first_iclog != iclog); @@ -2344,7 +2303,7 @@ xlog_state_do_callback( spin_unlock(&log->l_icloglock); if (wake) - sv_broadcast(&log->l_flush_wait); + wake_up_all(&log->l_flush_wait); } @@ -2395,7 +2354,7 @@ xlog_state_done_syncing( * iclog buffer, we wake them all, one will get to do the * I/O, the others get to wait for the result. */ - sv_broadcast(&iclog->ic_write_wait); + wake_up_all(&iclog->ic_write_wait); spin_unlock(&log->l_icloglock); xlog_state_do_callback(log, aborted, iclog); /* also cleans log */ } /* xlog_state_done_syncing */ @@ -2444,7 +2403,7 @@ restart: XFS_STATS_INC(xs_log_noiclogs); /* Wait for log writes to have flushed */ - sv_wait(&log->l_flush_wait, 0, &log->l_icloglock, 0); + xlog_wait(&log->l_flush_wait, &log->l_icloglock); goto restart; } @@ -2527,6 +2486,18 @@ restart: * * Once a ticket gets put onto the reserveq, it will only return after * the needed reservation is satisfied. + * + * This function is structured so that it has a lock free fast path. This is + * necessary because every new transaction reservation will come through this + * path. Hence any lock will be globally hot if we take it unconditionally on + * every pass. + * + * As tickets are only ever moved on and off the reserveq under the + * l_grant_reserve_lock, we only need to take that lock if we are going + * to add the ticket to the queue and sleep. We can avoid taking the lock if the + * ticket was never added to the reserveq because the t_queue list head will be + * empty and we hold the only reference to it so it can safely be checked + * unlocked. */ STATIC int xlog_grant_log_space(xlog_t *log, @@ -2534,24 +2505,27 @@ xlog_grant_log_space(xlog_t *log, { int free_bytes; int need_bytes; -#ifdef DEBUG - xfs_lsn_t tail_lsn; -#endif - #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("grant Recovery problem"); #endif - /* Is there space or do we need to sleep? */ - spin_lock(&log->l_grant_lock); - trace_xfs_log_grant_enter(log, tic); + need_bytes = tic->t_unit_res; + if (tic->t_flags & XFS_LOG_PERM_RESERV) + need_bytes *= tic->t_ocnt; + /* something is already sleeping; insert new transaction at end */ - if (log->l_reserve_headq) { - xlog_ins_ticketq(&log->l_reserve_headq, tic); + if (!list_empty_careful(&log->l_reserveq)) { + spin_lock(&log->l_grant_reserve_lock); + /* recheck the queue now we are locked */ + if (list_empty(&log->l_reserveq)) { + spin_unlock(&log->l_grant_reserve_lock); + goto redo; + } + list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep1(log, tic); @@ -2563,72 +2537,57 @@ xlog_grant_log_space(xlog_t *log, goto error_return; XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); + /* * If we got an error, and the filesystem is shutting down, * we'll catch it down below. So just continue... */ trace_xfs_log_grant_wake1(log, tic); - spin_lock(&log->l_grant_lock); } - if (tic->t_flags & XFS_LOG_PERM_RESERV) - need_bytes = tic->t_unit_res*tic->t_ocnt; - else - need_bytes = tic->t_unit_res; redo: if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; - free_bytes = xlog_space_left(log, log->l_grant_reserve_cycle, - log->l_grant_reserve_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); if (free_bytes < need_bytes) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_reserve_headq, tic); + spin_lock(&log->l_grant_reserve_lock); + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep2(log, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); - - XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); - - spin_lock(&log->l_grant_lock); if (XLOG_FORCED_SHUTDOWN(log)) goto error_return; - trace_xfs_log_grant_wake2(log, tic); + xlog_grant_push_ail(log, need_bytes); + + XFS_STATS_INC(xs_sleep_logspace); + xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); + trace_xfs_log_grant_wake2(log, tic); goto redo; - } else if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); + } - /* we've got enough space */ - xlog_grant_add_space(log, need_bytes); -#ifdef DEBUG - tail_lsn = log->l_tail_lsn; - /* - * Check to make sure the grant write head didn't just over lap the - * tail. If the cycles are the same, we can't be overlapping. - * Otherwise, make sure that the cycles differ by exactly one and - * check the byte count. - */ - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle-1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); + if (!list_empty(&tic->t_queue)) { + spin_lock(&log->l_grant_reserve_lock); + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_reserve_lock); } -#endif + + /* we've got enough space */ + xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); - xlog_verify_grant_head(log, 1); - spin_unlock(&log->l_grant_lock); + xlog_verify_grant_tail(log); return 0; - error_return: - if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); - +error_return_unlocked: + spin_lock(&log->l_grant_reserve_lock); +error_return: + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_reserve_lock); trace_xfs_log_grant_error(log, tic); /* @@ -2638,7 +2597,6 @@ redo: */ tic->t_curr_res = 0; tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ - spin_unlock(&log->l_grant_lock); return XFS_ERROR(EIO); } /* xlog_grant_log_space */ @@ -2646,17 +2604,14 @@ redo: /* * Replenish the byte reservation required by moving the grant write head. * - * + * Similar to xlog_grant_log_space, the function is structured to have a lock + * free fast path. */ STATIC int xlog_regrant_write_log_space(xlog_t *log, xlog_ticket_t *tic) { int free_bytes, need_bytes; - xlog_ticket_t *ntic; -#ifdef DEBUG - xfs_lsn_t tail_lsn; -#endif tic->t_curr_res = tic->t_unit_res; xlog_tic_reset_res(tic); @@ -2669,12 +2624,9 @@ xlog_regrant_write_log_space(xlog_t *log, panic("regrant Recovery problem"); #endif - spin_lock(&log->l_grant_lock); - trace_xfs_log_regrant_write_enter(log, tic); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; /* If there are other waiters on the queue then give them a * chance at logspace before us. Wake up the first waiters, @@ -2683,92 +2635,76 @@ xlog_regrant_write_log_space(xlog_t *log, * this transaction. */ need_bytes = tic->t_unit_res; - if ((ntic = log->l_write_headq)) { - free_bytes = xlog_space_left(log, log->l_grant_write_cycle, - log->l_grant_write_bytes); - do { + if (!list_empty_careful(&log->l_writeq)) { + struct xlog_ticket *ntic; + + spin_lock(&log->l_grant_write_lock); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); + list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); if (free_bytes < ntic->t_unit_res) break; free_bytes -= ntic->t_unit_res; - sv_signal(&ntic->t_wait); - ntic = ntic->t_next; - } while (ntic != log->l_write_headq); - - if (ntic != log->l_write_headq) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_write_headq, tic); + wake_up(&ntic->t_wait); + } + if (ntic != list_first_entry(&log->l_writeq, + struct xlog_ticket, t_queue)) { + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_writeq); trace_xfs_log_regrant_write_sleep1(log, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, - &log->l_grant_lock, s); - - /* If we're shutting down, this tic is already - * off the queue */ - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; - + xlog_wait(&tic->t_wait, &log->l_grant_write_lock); trace_xfs_log_regrant_write_wake1(log, tic); - } + } else + spin_unlock(&log->l_grant_write_lock); } redo: if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; - free_bytes = xlog_space_left(log, log->l_grant_write_cycle, - log->l_grant_write_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); if (free_bytes < need_bytes) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_write_headq, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); - - XFS_STATS_INC(xs_sleep_logspace); - trace_xfs_log_regrant_write_sleep2(log, tic); - - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + spin_lock(&log->l_grant_write_lock); + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_writeq); - /* If we're shutting down, this tic is already off the queue */ - spin_lock(&log->l_grant_lock); if (XLOG_FORCED_SHUTDOWN(log)) goto error_return; + xlog_grant_push_ail(log, need_bytes); + + XFS_STATS_INC(xs_sleep_logspace); + trace_xfs_log_regrant_write_sleep2(log, tic); + xlog_wait(&tic->t_wait, &log->l_grant_write_lock); + trace_xfs_log_regrant_write_wake2(log, tic); goto redo; - } else if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_write_headq, tic); + } - /* we've got enough space */ - xlog_grant_add_space_write(log, need_bytes); -#ifdef DEBUG - tail_lsn = log->l_tail_lsn; - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle-1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); + if (!list_empty(&tic->t_queue)) { + spin_lock(&log->l_grant_write_lock); + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_write_lock); } -#endif + /* we've got enough space */ + xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); - - xlog_verify_grant_head(log, 1); - spin_unlock(&log->l_grant_lock); + xlog_verify_grant_tail(log); return 0; + error_return_unlocked: + spin_lock(&log->l_grant_write_lock); error_return: - if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); - + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_write_lock); trace_xfs_log_regrant_write_error(log, tic); /* @@ -2778,7 +2714,6 @@ redo: */ tic->t_curr_res = 0; tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ - spin_unlock(&log->l_grant_lock); return XFS_ERROR(EIO); } /* xlog_regrant_write_log_space */ @@ -2799,27 +2734,24 @@ xlog_regrant_reserve_log_space(xlog_t *log, if (ticket->t_cnt > 0) ticket->t_cnt--; - spin_lock(&log->l_grant_lock); - xlog_grant_sub_space(log, ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_reserve_head, + ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_write_head, + ticket->t_curr_res); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); trace_xfs_log_regrant_reserve_sub(log, ticket); - xlog_verify_grant_head(log, 1); - /* just return if we still have some of the pre-reserved space */ - if (ticket->t_cnt > 0) { - spin_unlock(&log->l_grant_lock); + if (ticket->t_cnt > 0) return; - } - xlog_grant_add_space_reserve(log, ticket->t_unit_res); + xlog_grant_add_space(log, &log->l_grant_reserve_head, + ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); - xlog_verify_grant_head(log, 0); - spin_unlock(&log->l_grant_lock); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); } /* xlog_regrant_reserve_log_space */ @@ -2843,28 +2775,29 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, xlog_ticket_t *ticket) { + int bytes; + if (ticket->t_cnt > 0) ticket->t_cnt--; - spin_lock(&log->l_grant_lock); trace_xfs_log_ungrant_enter(log, ticket); - - xlog_grant_sub_space(log, ticket->t_curr_res); - trace_xfs_log_ungrant_sub(log, ticket); - /* If this is a permanent reservation ticket, we may be able to free + /* + * If this is a permanent reservation ticket, we may be able to free * up more space based on the remaining count. */ + bytes = ticket->t_curr_res; if (ticket->t_cnt > 0) { ASSERT(ticket->t_flags & XLOG_TIC_PERM_RESERV); - xlog_grant_sub_space(log, ticket->t_unit_res*ticket->t_cnt); + bytes += ticket->t_unit_res*ticket->t_cnt; } + xlog_grant_sub_space(log, &log->l_grant_reserve_head, bytes); + xlog_grant_sub_space(log, &log->l_grant_write_head, bytes); + trace_xfs_log_ungrant_exit(log, ticket); - xlog_verify_grant_head(log, 1); - spin_unlock(&log->l_grant_lock); xfs_log_move_tail(log->l_mp, 1); } /* xlog_ungrant_log_space */ @@ -2901,11 +2834,11 @@ xlog_state_release_iclog( if (iclog->ic_state == XLOG_STATE_WANT_SYNC) { /* update tail before writing to iclog */ - xlog_assign_tail_lsn(log->l_mp); + xfs_lsn_t tail_lsn = xlog_assign_tail_lsn(log->l_mp); sync++; iclog->ic_state = XLOG_STATE_SYNCING; - iclog->ic_header.h_tail_lsn = cpu_to_be64(log->l_tail_lsn); - xlog_verify_tail_lsn(log, iclog, log->l_tail_lsn); + iclog->ic_header.h_tail_lsn = cpu_to_be64(tail_lsn); + xlog_verify_tail_lsn(log, iclog, tail_lsn); /* cycle incremented when incrementing curr_block */ } spin_unlock(&log->l_icloglock); @@ -3088,7 +3021,7 @@ maybe_sleep: return XFS_ERROR(EIO); } XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_force_wait, PINOD, &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, &log->l_icloglock); /* * No need to grab the log lock here since we're * only deciding whether or not to return EIO @@ -3206,8 +3139,8 @@ try_again: XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_prev->ic_write_wait, - PSWP, &log->l_icloglock, s); + xlog_wait(&iclog->ic_prev->ic_write_wait, + &log->l_icloglock); if (log_flushed) *log_flushed = 1; already_slept = 1; @@ -3235,7 +3168,7 @@ try_again: return XFS_ERROR(EIO); } XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, &log->l_icloglock); /* * No need to grab the log lock here since we're * only deciding whether or not to return EIO @@ -3310,10 +3243,8 @@ xfs_log_ticket_put( xlog_ticket_t *ticket) { ASSERT(atomic_read(&ticket->t_ref) > 0); - if (atomic_dec_and_test(&ticket->t_ref)) { - sv_destroy(&ticket->t_wait); + if (atomic_dec_and_test(&ticket->t_ref)) kmem_zone_free(xfs_log_ticket_zone, ticket); - } } xlog_ticket_t * @@ -3435,6 +3366,7 @@ xlog_ticket_alloc( } atomic_set(&tic->t_ref, 1); + INIT_LIST_HEAD(&tic->t_queue); tic->t_unit_res = unit_bytes; tic->t_curr_res = unit_bytes; tic->t_cnt = cnt; @@ -3445,7 +3377,7 @@ xlog_ticket_alloc( tic->t_trans_type = 0; if (xflags & XFS_LOG_PERM_RESERV) tic->t_flags |= XLOG_TIC_PERM_RESERV; - sv_init(&tic->t_wait, SV_DEFAULT, "logtick"); + init_waitqueue_head(&tic->t_wait); xlog_tic_reset_res(tic); @@ -3484,18 +3416,25 @@ xlog_verify_dest_ptr( } STATIC void -xlog_verify_grant_head(xlog_t *log, int equals) +xlog_verify_grant_tail( + struct log *log) { - if (log->l_grant_reserve_cycle == log->l_grant_write_cycle) { - if (equals) - ASSERT(log->l_grant_reserve_bytes >= log->l_grant_write_bytes); - else - ASSERT(log->l_grant_reserve_bytes > log->l_grant_write_bytes); - } else { - ASSERT(log->l_grant_reserve_cycle-1 == log->l_grant_write_cycle); - ASSERT(log->l_grant_write_bytes >= log->l_grant_reserve_bytes); - } -} /* xlog_verify_grant_head */ + int tail_cycle, tail_blocks; + int cycle, space; + + /* + * Check to make sure the grant write head didn't just over lap the + * tail. If the cycles are the same, we can't be overlapping. + * Otherwise, make sure that the cycles differ by exactly one and + * check the byte count. + */ + xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_blocks); + if (tail_cycle != cycle) { + ASSERT(cycle - 1 == tail_cycle); + ASSERT(space <= BBTOB(tail_blocks)); + } +} /* check if it will fit */ STATIC void @@ -3716,12 +3655,10 @@ xfs_log_force_umount( xlog_cil_force(log); /* - * We must hold both the GRANT lock and the LOG lock, - * before we mark the filesystem SHUTDOWN and wake - * everybody up to tell the bad news. + * mark the filesystem and the as in a shutdown state and wake + * everybody up to tell them the bad news. */ spin_lock(&log->l_icloglock); - spin_lock(&log->l_grant_lock); mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN; if (mp->m_sb_bp) XFS_BUF_DONE(mp->m_sb_bp); @@ -3742,27 +3679,21 @@ xfs_log_force_umount( spin_unlock(&log->l_icloglock); /* - * We don't want anybody waiting for log reservations - * after this. That means we have to wake up everybody - * queued up on reserve_headq as well as write_headq. - * In addition, we make sure in xlog_{re}grant_log_space - * that we don't enqueue anything once the SHUTDOWN flag - * is set, and this action is protected by the GRANTLOCK. + * We don't want anybody waiting for log reservations after this. That + * means we have to wake up everybody queued up on reserveq as well as + * writeq. In addition, we make sure in xlog_{re}grant_log_space that + * we don't enqueue anything once the SHUTDOWN flag is set, and this + * action is protected by the grant locks. */ - if ((tic = log->l_reserve_headq)) { - do { - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_reserve_headq); - } - - if ((tic = log->l_write_headq)) { - do { - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_write_headq); - } - spin_unlock(&log->l_grant_lock); + spin_lock(&log->l_grant_reserve_lock); + list_for_each_entry(tic, &log->l_reserveq, t_queue) + wake_up(&tic->t_wait); + spin_unlock(&log->l_grant_reserve_lock); + + spin_lock(&log->l_grant_write_lock); + list_for_each_entry(tic, &log->l_writeq, t_queue) + wake_up(&tic->t_wait); + spin_unlock(&log->l_grant_write_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { ASSERT(!logerror); diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index 23d6ceb..9dc8125 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -61,7 +61,7 @@ xlog_cil_init( INIT_LIST_HEAD(&cil->xc_committing); spin_lock_init(&cil->xc_cil_lock); init_rwsem(&cil->xc_ctx_lock); - sv_init(&cil->xc_commit_wait, SV_DEFAULT, "cilwait"); + init_waitqueue_head(&cil->xc_commit_wait); INIT_LIST_HEAD(&ctx->committing); INIT_LIST_HEAD(&ctx->busy_extents); @@ -361,15 +361,10 @@ xlog_cil_committed( int abort) { struct xfs_cil_ctx *ctx = args; - struct xfs_log_vec *lv; - int abortflag = abort ? XFS_LI_ABORTED : 0; struct xfs_busy_extent *busyp, *n; - /* unpin all the log items */ - for (lv = ctx->lv_chain; lv; lv = lv->lv_next ) { - xfs_trans_item_committed(lv->lv_item, ctx->start_lsn, - abortflag); - } + xfs_trans_committed_bulk(ctx->cil->xc_log->l_ailp, ctx->lv_chain, + ctx->start_lsn, abort); list_for_each_entry_safe(busyp, n, &ctx->busy_extents, list) xfs_alloc_busy_clear(ctx->cil->xc_log->l_mp, busyp); @@ -568,7 +563,7 @@ restart: * It is still being pushed! Wait for the push to * complete, then start again from the beginning. */ - sv_wait(&cil->xc_commit_wait, 0, &cil->xc_cil_lock, 0); + xlog_wait(&cil->xc_commit_wait, &cil->xc_cil_lock); goto restart; } } @@ -592,7 +587,7 @@ restart: */ spin_lock(&cil->xc_cil_lock); ctx->commit_lsn = commit_lsn; - sv_broadcast(&cil->xc_commit_wait); + wake_up_all(&cil->xc_commit_wait); spin_unlock(&cil->xc_cil_lock); /* release the hounds! */ @@ -757,7 +752,7 @@ restart: * It is still being pushed! Wait for the push to * complete, then start again from the beginning. */ - sv_wait(&cil->xc_commit_wait, 0, &cil->xc_cil_lock, 0); + xlog_wait(&cil->xc_commit_wait, &cil->xc_cil_lock); goto restart; } if (ctx->sequence != sequence) diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index edcdfe0..d5f8be8 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -21,7 +21,6 @@ struct xfs_buf; struct log; struct xlog_ticket; -struct xfs_buf_cancel; struct xfs_mount; /* @@ -54,7 +53,6 @@ struct xfs_mount; BTOBB(XLOG_MAX_ICLOGS << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \ XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) - static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block) { return ((xfs_lsn_t)cycle << 32) | block; @@ -133,12 +131,10 @@ static inline uint xlog_get_client_id(__be32 i) */ #define XLOG_TIC_INITED 0x1 /* has been initialized */ #define XLOG_TIC_PERM_RESERV 0x2 /* permanent reservation */ -#define XLOG_TIC_IN_Q 0x4 #define XLOG_TIC_FLAGS \ { XLOG_TIC_INITED, "XLOG_TIC_INITED" }, \ - { XLOG_TIC_PERM_RESERV, "XLOG_TIC_PERM_RESERV" }, \ - { XLOG_TIC_IN_Q, "XLOG_TIC_IN_Q" } + { XLOG_TIC_PERM_RESERV, "XLOG_TIC_PERM_RESERV" } #endif /* __KERNEL__ */ @@ -244,9 +240,8 @@ typedef struct xlog_res { } xlog_res_t; typedef struct xlog_ticket { - sv_t t_wait; /* ticket wait queue : 20 */ - struct xlog_ticket *t_next; /* :4|8 */ - struct xlog_ticket *t_prev; /* :4|8 */ + wait_queue_head_t t_wait; /* ticket wait queue */ + struct list_head t_queue; /* reserve/write queue */ xlog_tid_t t_tid; /* transaction identifier : 4 */ atomic_t t_ref; /* ticket reference count : 4 */ int t_curr_res; /* current reservation in bytes : 4 */ @@ -353,8 +348,8 @@ typedef union xlog_in_core2 { * and move everything else out to subsequent cachelines. */ typedef struct xlog_in_core { - sv_t ic_force_wait; - sv_t ic_write_wait; + wait_queue_head_t ic_force_wait; + wait_queue_head_t ic_write_wait; struct xlog_in_core *ic_next; struct xlog_in_core *ic_prev; struct xfs_buf *ic_bp; @@ -421,7 +416,7 @@ struct xfs_cil { struct xfs_cil_ctx *xc_ctx; struct rw_semaphore xc_ctx_lock; struct list_head xc_committing; - sv_t xc_commit_wait; + wait_queue_head_t xc_commit_wait; xfs_lsn_t xc_current_sequence; }; @@ -491,7 +486,7 @@ typedef struct log { struct xfs_buftarg *l_targ; /* buftarg of log */ uint l_flags; uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */ - struct xfs_buf_cancel **l_buf_cancel_table; + struct list_head *l_buf_cancel_table; int l_iclog_hsize; /* size of iclog header */ int l_iclog_heads; /* # of iclog header sectors */ uint l_sectBBsize; /* sector size in BBs (2^n) */ @@ -503,29 +498,40 @@ typedef struct log { int l_logBBsize; /* size of log in BB chunks */ /* The following block of fields are changed while holding icloglock */ - sv_t l_flush_wait ____cacheline_aligned_in_smp; + wait_queue_head_t l_flush_wait ____cacheline_aligned_in_smp; /* waiting for iclog flush */ int l_covered_state;/* state of "covering disk * log entries" */ xlog_in_core_t *l_iclog; /* head log queue */ spinlock_t l_icloglock; /* grab to change iclog state */ - xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed - * buffers */ - xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */ int l_curr_cycle; /* Cycle number of log writes */ int l_prev_cycle; /* Cycle number before last * block increment */ int l_curr_block; /* current logical log block */ int l_prev_block; /* previous logical log block */ - /* The following block of fields are changed while holding grant_lock */ - spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - xlog_ticket_t *l_reserve_headq; - xlog_ticket_t *l_write_headq; - int l_grant_reserve_cycle; - int l_grant_reserve_bytes; - int l_grant_write_cycle; - int l_grant_write_bytes; + /* + * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and + * read without needing to hold specific locks. To avoid operations + * contending with other hot objects, place each of them on a separate + * cacheline. + */ + /* lsn of last LR on disk */ + atomic64_t l_last_sync_lsn ____cacheline_aligned_in_smp; + /* lsn of 1st LR with unflushed * buffers */ + atomic64_t l_tail_lsn ____cacheline_aligned_in_smp; + + /* + * ticket grant locks, queues and accounting have their own cachlines + * as these are quite hot and can be operated on concurrently. + */ + spinlock_t l_grant_reserve_lock ____cacheline_aligned_in_smp; + struct list_head l_reserveq; + atomic64_t l_grant_reserve_head; + + spinlock_t l_grant_write_lock ____cacheline_aligned_in_smp; + struct list_head l_writeq; + atomic64_t l_grant_write_head; /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG @@ -534,6 +540,9 @@ typedef struct log { } xlog_t; +#define XLOG_BUF_CANCEL_BUCKET(log, blkno) \ + ((log)->l_buf_cancel_table + ((__uint64_t)blkno % XLOG_BC_TABLE_SIZE)) + #define XLOG_FORCED_SHUTDOWN(log) ((log)->l_flags & XLOG_IO_ERROR) /* common routines */ @@ -562,6 +571,61 @@ int xlog_write(struct log *log, struct xfs_log_vec *log_vector, xlog_in_core_t **commit_iclog, uint flags); /* + * When we crack an atomic LSN, we sample it first so that the value will not + * change while we are cracking it into the component values. This means we + * will always get consistent component values to work from. This should always + * be used to smaple and crack LSNs taht are stored and updated in atomic + * variables. + */ +static inline void +xlog_crack_atomic_lsn(atomic64_t *lsn, uint *cycle, uint *block) +{ + xfs_lsn_t val = atomic64_read(lsn); + + *cycle = CYCLE_LSN(val); + *block = BLOCK_LSN(val); +} + +/* + * Calculate and assign a value to an atomic LSN variable from component pieces. + */ +static inline void +xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) +{ + atomic64_set(lsn, xlog_assign_lsn(cycle, block)); +} + +/* + * When we crack the grant head, we sample it first so that the value will not + * change while we are cracking it into the component values. This means we + * will always get consistent component values to work from. + */ +static inline void +xlog_crack_grant_head_val(int64_t val, int *cycle, int *space) +{ + *cycle = val >> 32; + *space = val & 0xffffffff; +} + +static inline void +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) +{ + xlog_crack_grant_head_val(atomic64_read(head), cycle, space); +} + +static inline int64_t +xlog_assign_grant_head_val(int cycle, int space) +{ + return ((int64_t)cycle << 32) | space; +} + +static inline void +xlog_assign_grant_head(atomic64_t *head, int cycle, int space) +{ + atomic64_set(head, xlog_assign_grant_head_val(cycle, space)); +} + +/* * Committed Item List interfaces */ int xlog_cil_init(struct log *log); @@ -585,6 +649,21 @@ xlog_cil_force(struct log *log) */ #define XLOG_UNMOUNT_REC_TYPE (-1U) +/* + * Wrapper function for waiting on a wait queue serialised against wakeups + * by a spinlock. This matches the semantics of all the wait queues used in the + * log code. + */ +static inline void xlog_wait(wait_queue_head_t *wq, spinlock_t *lock) +{ + DECLARE_WAITQUEUE(wait, current); + + add_wait_queue_exclusive(wq, &wait); + __set_current_state(TASK_UNINTERRUPTIBLE); + spin_unlock(lock); + schedule(); + remove_wait_queue(wq, &wait); +} #endif /* __KERNEL__ */ #endif /* __XFS_LOG_PRIV_H__ */ diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 966d3f9..204d8e5 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -53,6 +53,17 @@ STATIC void xlog_recover_check_summary(xlog_t *); #endif /* + * This structure is used during recovery to record the buf log items which + * have been canceled and should not be replayed. + */ +struct xfs_buf_cancel { + xfs_daddr_t bc_blkno; + uint bc_len; + int bc_refcount; + struct list_head bc_list; +}; + +/* * Sector aligned buffer routines for buffer create/read/write/access */ @@ -925,12 +936,12 @@ xlog_find_tail( log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); if (found == 2) log->l_curr_cycle++; - log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); - log->l_last_sync_lsn = be64_to_cpu(rhead->h_lsn); - log->l_grant_reserve_cycle = log->l_curr_cycle; - log->l_grant_reserve_bytes = BBTOB(log->l_curr_block); - log->l_grant_write_cycle = log->l_curr_cycle; - log->l_grant_write_bytes = BBTOB(log->l_curr_block); + atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); + atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); + xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, + BBTOB(log->l_curr_block)); + xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, + BBTOB(log->l_curr_block)); /* * Look for unmount record. If we find it, then we know there @@ -960,7 +971,7 @@ xlog_find_tail( } after_umount_blk = (i + hblks + (int) BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; - tail_lsn = log->l_tail_lsn; + tail_lsn = atomic64_read(&log->l_tail_lsn); if (*head_blk == after_umount_blk && be32_to_cpu(rhead->h_num_logops) == 1) { umount_data_blk = (i + hblks) % log->l_logBBsize; @@ -975,12 +986,10 @@ xlog_find_tail( * log records will point recovery to after the * current unmount record. */ - log->l_tail_lsn = - xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk); - log->l_last_sync_lsn = - xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk); + xlog_assign_atomic_lsn(&log->l_tail_lsn, + log->l_curr_cycle, after_umount_blk); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, + log->l_curr_cycle, after_umount_blk); *tail_blk = after_umount_blk; /* @@ -1605,82 +1614,45 @@ xlog_recover_reorder_trans( * record in the table to tell us how many times we expect to see this * record during the second pass. */ -STATIC void -xlog_recover_do_buffer_pass1( - xlog_t *log, - xfs_buf_log_format_t *buf_f) +STATIC int +xlog_recover_buffer_pass1( + struct log *log, + xlog_recover_item_t *item) { - xfs_buf_cancel_t *bcp; - xfs_buf_cancel_t *nextp; - xfs_buf_cancel_t *prevp; - xfs_buf_cancel_t **bucket; - xfs_daddr_t blkno = 0; - uint len = 0; - ushort flags = 0; - - switch (buf_f->blf_type) { - case XFS_LI_BUF: - blkno = buf_f->blf_blkno; - len = buf_f->blf_len; - flags = buf_f->blf_flags; - break; - } + xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; + struct list_head *bucket; + struct xfs_buf_cancel *bcp; /* * If this isn't a cancel buffer item, then just return. */ - if (!(flags & XFS_BLF_CANCEL)) { + if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { trace_xfs_log_recover_buf_not_cancel(log, buf_f); - return; - } - - /* - * Insert an xfs_buf_cancel record into the hash table of - * them. If there is already an identical record, bump - * its reference count. - */ - bucket = &log->l_buf_cancel_table[(__uint64_t)blkno % - XLOG_BC_TABLE_SIZE]; - /* - * If the hash bucket is empty then just insert a new record into - * the bucket. - */ - if (*bucket == NULL) { - bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t), - KM_SLEEP); - bcp->bc_blkno = blkno; - bcp->bc_len = len; - bcp->bc_refcount = 1; - bcp->bc_next = NULL; - *bucket = bcp; - return; + return 0; } /* - * The hash bucket is not empty, so search for duplicates of our - * record. If we find one them just bump its refcount. If not - * then add us at the end of the list. + * Insert an xfs_buf_cancel record into the hash table of them. + * If there is already an identical record, bump its reference count. */ - prevp = NULL; - nextp = *bucket; - while (nextp != NULL) { - if (nextp->bc_blkno == blkno && nextp->bc_len == len) { - nextp->bc_refcount++; + bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); + list_for_each_entry(bcp, bucket, bc_list) { + if (bcp->bc_blkno == buf_f->blf_blkno && + bcp->bc_len == buf_f->blf_len) { + bcp->bc_refcount++; trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); - return; + return 0; } - prevp = nextp; - nextp = nextp->bc_next; - } - ASSERT(prevp != NULL); - bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t), - KM_SLEEP); - bcp->bc_blkno = blkno; - bcp->bc_len = len; + } + + bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); + bcp->bc_blkno = buf_f->blf_blkno; + bcp->bc_len = buf_f->blf_len; bcp->bc_refcount = 1; - bcp->bc_next = NULL; - prevp->bc_next = bcp; + list_add_tail(&bcp->bc_list, bucket); + trace_xfs_log_recover_buf_cancel_add(log, buf_f); + return 0; } /* @@ -1698,14 +1670,13 @@ xlog_recover_do_buffer_pass1( */ STATIC int xlog_check_buffer_cancelled( - xlog_t *log, + struct log *log, xfs_daddr_t blkno, uint len, ushort flags) { - xfs_buf_cancel_t *bcp; - xfs_buf_cancel_t *prevp; - xfs_buf_cancel_t **bucket; + struct list_head *bucket; + struct xfs_buf_cancel *bcp; if (log->l_buf_cancel_table == NULL) { /* @@ -1716,128 +1687,70 @@ xlog_check_buffer_cancelled( return 0; } - bucket = &log->l_buf_cancel_table[(__uint64_t)blkno % - XLOG_BC_TABLE_SIZE]; - bcp = *bucket; - if (bcp == NULL) { - /* - * There is no corresponding entry in the table built - * in pass one, so this buffer has not been cancelled. - */ - ASSERT(!(flags & XFS_BLF_CANCEL)); - return 0; - } - /* - * Search for an entry in the buffer cancel table that - * matches our buffer. + * Search for an entry in the cancel table that matches our buffer. */ - prevp = NULL; - while (bcp != NULL) { - if (bcp->bc_blkno == blkno && bcp->bc_len == len) { - /* - * We've go a match, so return 1 so that the - * recovery of this buffer is cancelled. - * If this buffer is actually a buffer cancel - * log item, then decrement the refcount on the - * one in the table and remove it if this is the - * last reference. - */ - if (flags & XFS_BLF_CANCEL) { - bcp->bc_refcount--; - if (bcp->bc_refcount == 0) { - if (prevp == NULL) { - *bucket = bcp->bc_next; - } else { - prevp->bc_next = bcp->bc_next; - } - kmem_free(bcp); - } - } - return 1; - } - prevp = bcp; - bcp = bcp->bc_next; + bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); + list_for_each_entry(bcp, bucket, bc_list) { + if (bcp->bc_blkno == blkno && bcp->bc_len == len) + goto found; } + /* - * We didn't find a corresponding entry in the table, so - * return 0 so that the buffer is NOT cancelled. + * We didn't find a corresponding entry in the table, so return 0 so + * that the buffer is NOT cancelled. */ ASSERT(!(flags & XFS_BLF_CANCEL)); return 0; -} -STATIC int -xlog_recover_do_buffer_pass2( - xlog_t *log, - xfs_buf_log_format_t *buf_f) -{ - xfs_daddr_t blkno = 0; - ushort flags = 0; - uint len = 0; - - switch (buf_f->blf_type) { - case XFS_LI_BUF: - blkno = buf_f->blf_blkno; - flags = buf_f->blf_flags; - len = buf_f->blf_len; - break; +found: + /* + * We've go a match, so return 1 so that the recovery of this buffer + * is cancelled. If this buffer is actually a buffer cancel log + * item, then decrement the refcount on the one in the table and + * remove it if this is the last reference. + */ + if (flags & XFS_BLF_CANCEL) { + if (--bcp->bc_refcount == 0) { + list_del(&bcp->bc_list); + kmem_free(bcp); + } } - - return xlog_check_buffer_cancelled(log, blkno, len, flags); + return 1; } /* - * Perform recovery for a buffer full of inodes. In these buffers, - * the only data which should be recovered is that which corresponds - * to the di_next_unlinked pointers in the on disk inode structures. - * The rest of the data for the inodes is always logged through the - * inodes themselves rather than the inode buffer and is recovered - * in xlog_recover_do_inode_trans(). + * Perform recovery for a buffer full of inodes. In these buffers, the only + * data which should be recovered is that which corresponds to the + * di_next_unlinked pointers in the on disk inode structures. The rest of the + * data for the inodes is always logged through the inodes themselves rather + * than the inode buffer and is recovered in xlog_recover_inode_pass2(). * - * The only time when buffers full of inodes are fully recovered is - * when the buffer is full of newly allocated inodes. In this case - * the buffer will not be marked as an inode buffer and so will be - * sent to xlog_recover_do_reg_buffer() below during recovery. + * The only time when buffers full of inodes are fully recovered is when the + * buffer is full of newly allocated inodes. In this case the buffer will + * not be marked as an inode buffer and so will be sent to + * xlog_recover_do_reg_buffer() below during recovery. */ STATIC int xlog_recover_do_inode_buffer( - xfs_mount_t *mp, + struct xfs_mount *mp, xlog_recover_item_t *item, - xfs_buf_t *bp, + struct xfs_buf *bp, xfs_buf_log_format_t *buf_f) { int i; - int item_index; - int bit; - int nbits; - int reg_buf_offset; - int reg_buf_bytes; + int item_index = 0; + int bit = 0; + int nbits = 0; + int reg_buf_offset = 0; + int reg_buf_bytes = 0; int next_unlinked_offset; int inodes_per_buf; xfs_agino_t *logged_nextp; xfs_agino_t *buffer_nextp; - unsigned int *data_map = NULL; - unsigned int map_size = 0; trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); - switch (buf_f->blf_type) { - case XFS_LI_BUF: - data_map = buf_f->blf_data_map; - map_size = buf_f->blf_map_size; - break; - } - /* - * Set the variables corresponding to the current region to - * 0 so that we'll initialize them on the first pass through - * the loop. - */ - reg_buf_offset = 0; - reg_buf_bytes = 0; - bit = 0; - nbits = 0; - item_index = 0; inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog; for (i = 0; i < inodes_per_buf; i++) { next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + @@ -1852,18 +1765,18 @@ xlog_recover_do_inode_buffer( * the current di_next_unlinked field. */ bit += nbits; - bit = xfs_next_bit(data_map, map_size, bit); + bit = xfs_next_bit(buf_f->blf_data_map, + buf_f->blf_map_size, bit); /* * If there are no more logged regions in the * buffer, then we're done. */ - if (bit == -1) { + if (bit == -1) return 0; - } - nbits = xfs_contig_bits(data_map, map_size, - bit); + nbits = xfs_contig_bits(buf_f->blf_data_map, + buf_f->blf_map_size, bit); ASSERT(nbits > 0); reg_buf_offset = bit << XFS_BLF_SHIFT; reg_buf_bytes = nbits << XFS_BLF_SHIFT; @@ -1875,9 +1788,8 @@ xlog_recover_do_inode_buffer( * di_next_unlinked field, then move on to the next * di_next_unlinked field. */ - if (next_unlinked_offset < reg_buf_offset) { + if (next_unlinked_offset < reg_buf_offset) continue; - } ASSERT(item->ri_buf[item_index].i_addr != NULL); ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); @@ -1913,36 +1825,29 @@ xlog_recover_do_inode_buffer( * given buffer. The bitmap in the buf log format structure indicates * where to place the logged data. */ -/*ARGSUSED*/ STATIC void xlog_recover_do_reg_buffer( struct xfs_mount *mp, xlog_recover_item_t *item, - xfs_buf_t *bp, + struct xfs_buf *bp, xfs_buf_log_format_t *buf_f) { int i; int bit; int nbits; - unsigned int *data_map = NULL; - unsigned int map_size = 0; int error; trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); - switch (buf_f->blf_type) { - case XFS_LI_BUF: - data_map = buf_f->blf_data_map; - map_size = buf_f->blf_map_size; - break; - } bit = 0; i = 1; /* 0 is the buf format structure */ while (1) { - bit = xfs_next_bit(data_map, map_size, bit); + bit = xfs_next_bit(buf_f->blf_data_map, + buf_f->blf_map_size, bit); if (bit == -1) break; - nbits = xfs_contig_bits(data_map, map_size, bit); + nbits = xfs_contig_bits(buf_f->blf_data_map, + buf_f->blf_map_size, bit); ASSERT(nbits > 0); ASSERT(item->ri_buf[i].i_addr != NULL); ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); @@ -2176,77 +2081,46 @@ xlog_recover_do_dquot_buffer( * for more details on the implementation of the table of cancel records. */ STATIC int -xlog_recover_do_buffer_trans( +xlog_recover_buffer_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_buf_t *bp; int error; - int cancel; - xfs_daddr_t blkno; - int len; - ushort flags; uint buf_flags; - if (pass == XLOG_RECOVER_PASS1) { - /* - * In this pass we're only looking for buf items - * with the XFS_BLF_CANCEL bit set. - */ - xlog_recover_do_buffer_pass1(log, buf_f); + /* + * In this pass we only want to recover all the buffers which have + * not been cancelled and are not cancellation buffers themselves. + */ + if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, + buf_f->blf_len, buf_f->blf_flags)) { + trace_xfs_log_recover_buf_cancel(log, buf_f); return 0; - } else { - /* - * In this pass we want to recover all the buffers - * which have not been cancelled and are not - * cancellation buffers themselves. The routine - * we call here will tell us whether or not to - * continue with the replay of this buffer. - */ - cancel = xlog_recover_do_buffer_pass2(log, buf_f); - if (cancel) { - trace_xfs_log_recover_buf_cancel(log, buf_f); - return 0; - } } + trace_xfs_log_recover_buf_recover(log, buf_f); - switch (buf_f->blf_type) { - case XFS_LI_BUF: - blkno = buf_f->blf_blkno; - len = buf_f->blf_len; - flags = buf_f->blf_flags; - break; - default: - xfs_fs_cmn_err(CE_ALERT, log->l_mp, - "xfs_log_recover: unknown buffer type 0x%x, logdev %s", - buf_f->blf_type, log->l_mp->m_logname ? - log->l_mp->m_logname : "internal"); - XFS_ERROR_REPORT("xlog_recover_do_buffer_trans", - XFS_ERRLEVEL_LOW, log->l_mp); - return XFS_ERROR(EFSCORRUPTED); - } - mp = log->l_mp; buf_flags = XBF_LOCK; - if (!(flags & XFS_BLF_INODE_BUF)) + if (!(buf_f->blf_flags & XFS_BLF_INODE_BUF)) buf_flags |= XBF_MAPPED; - bp = xfs_buf_read(mp->m_ddev_targp, blkno, len, buf_flags); + bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, + buf_flags); if (XFS_BUF_ISERROR(bp)) { - xfs_ioerror_alert("xlog_recover_do..(read#1)", log->l_mp, - bp, blkno); + xfs_ioerror_alert("xlog_recover_do..(read#1)", mp, + bp, buf_f->blf_blkno); error = XFS_BUF_GETERROR(bp); xfs_buf_relse(bp); return error; } error = 0; - if (flags & XFS_BLF_INODE_BUF) { + if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); - } else if (flags & + } else if (buf_f->blf_flags & (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); } else { @@ -2286,16 +2160,14 @@ xlog_recover_do_buffer_trans( } STATIC int -xlog_recover_do_inode_trans( +xlog_recover_inode_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { xfs_inode_log_format_t *in_f; - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_buf_t *bp; xfs_dinode_t *dip; - xfs_ino_t ino; int len; xfs_caddr_t src; xfs_caddr_t dest; @@ -2305,10 +2177,6 @@ xlog_recover_do_inode_trans( xfs_icdinode_t *dicp; int need_free = 0; - if (pass == XLOG_RECOVER_PASS1) { - return 0; - } - if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { in_f = item->ri_buf[0].i_addr; } else { @@ -2318,8 +2186,6 @@ xlog_recover_do_inode_trans( if (error) goto error; } - ino = in_f->ilf_ino; - mp = log->l_mp; /* * Inode buffers can be freed, look out for it, @@ -2354,8 +2220,8 @@ xlog_recover_do_inode_trans( xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode magic number, dino ptr = 0x%p, dino bp = 0x%p, ino = %Ld", - dip, bp, ino); - XFS_ERROR_REPORT("xlog_recover_do_inode_trans(1)", + dip, bp, in_f->ilf_ino); + XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", XFS_ERRLEVEL_LOW, mp); error = EFSCORRUPTED; goto error; @@ -2365,8 +2231,8 @@ xlog_recover_do_inode_trans( xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, ino %Ld", - item, ino); - XFS_ERROR_REPORT("xlog_recover_do_inode_trans(2)", + item, in_f->ilf_ino); + XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", XFS_ERRLEVEL_LOW, mp); error = EFSCORRUPTED; goto error; @@ -2394,12 +2260,12 @@ xlog_recover_do_inode_trans( if (unlikely((dicp->di_mode & S_IFMT) == S_IFREG)) { if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && (dicp->di_format != XFS_DINODE_FMT_BTREE)) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(3)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad regular inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", - item, dip, bp, ino); + item, dip, bp, in_f->ilf_ino); error = EFSCORRUPTED; goto error; } @@ -2407,40 +2273,40 @@ xlog_recover_do_inode_trans( if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && (dicp->di_format != XFS_DINODE_FMT_BTREE) && (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(4)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad dir inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", - item, dip, bp, ino); + item, dip, bp, in_f->ilf_ino); error = EFSCORRUPTED; goto error; } } if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(5)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", - item, dip, bp, ino, + item, dip, bp, in_f->ilf_ino, dicp->di_nextents + dicp->di_anextents, dicp->di_nblocks); error = EFSCORRUPTED; goto error; } if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(6)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode log rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, forkoff 0x%x", - item, dip, bp, ino, dicp->di_forkoff); + item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); error = EFSCORRUPTED; goto error; } if (unlikely(item->ri_buf[1].i_len > sizeof(struct xfs_icdinode))) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(7)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, @@ -2532,7 +2398,7 @@ xlog_recover_do_inode_trans( break; default: - xlog_warn("XFS: xlog_recover_do_inode_trans: Invalid flag"); + xlog_warn("XFS: xlog_recover_inode_pass2: Invalid flag"); ASSERT(0); xfs_buf_relse(bp); error = EIO; @@ -2556,18 +2422,11 @@ error: * of that type. */ STATIC int -xlog_recover_do_quotaoff_trans( +xlog_recover_quotaoff_pass1( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { - xfs_qoff_logformat_t *qoff_f; - - if (pass == XLOG_RECOVER_PASS2) { - return (0); - } - - qoff_f = item->ri_buf[0].i_addr; + xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; ASSERT(qoff_f); /* @@ -2588,22 +2447,17 @@ xlog_recover_do_quotaoff_trans( * Recover a dquot record */ STATIC int -xlog_recover_do_dquot_trans( +xlog_recover_dquot_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_buf_t *bp; struct xfs_disk_dquot *ddq, *recddq; int error; xfs_dq_logformat_t *dq_f; uint type; - if (pass == XLOG_RECOVER_PASS1) { - return 0; - } - mp = log->l_mp; /* * Filesystems are required to send in quota flags at mount time. @@ -2647,7 +2501,7 @@ xlog_recover_do_dquot_trans( if ((error = xfs_qm_dqcheck(recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, - "xlog_recover_do_dquot_trans (log copy)"))) { + "xlog_recover_dquot_pass2 (log copy)"))) { return XFS_ERROR(EIO); } ASSERT(dq_f->qlf_len == 1); @@ -2670,7 +2524,7 @@ xlog_recover_do_dquot_trans( * minimal initialization then. */ if (xfs_qm_dqcheck(ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, - "xlog_recover_do_dquot_trans")) { + "xlog_recover_dquot_pass2")) { xfs_buf_relse(bp); return XFS_ERROR(EIO); } @@ -2693,38 +2547,31 @@ xlog_recover_do_dquot_trans( * LSN. */ STATIC int -xlog_recover_do_efi_trans( +xlog_recover_efi_pass2( xlog_t *log, xlog_recover_item_t *item, - xfs_lsn_t lsn, - int pass) + xfs_lsn_t lsn) { int error; - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_efi_log_item_t *efip; xfs_efi_log_format_t *efi_formatp; - if (pass == XLOG_RECOVER_PASS1) { - return 0; - } - efi_formatp = item->ri_buf[0].i_addr; - mp = log->l_mp; efip = xfs_efi_init(mp, efi_formatp->efi_nextents); if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), &(efip->efi_format)))) { xfs_efi_item_free(efip); return error; } - efip->efi_next_extent = efi_formatp->efi_nextents; - efip->efi_flags |= XFS_EFI_COMMITTED; + atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); spin_lock(&log->l_ailp->xa_lock); /* * xfs_trans_ail_update() drops the AIL lock. */ - xfs_trans_ail_update(log->l_ailp, (xfs_log_item_t *)efip, lsn); + xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); return 0; } @@ -2737,11 +2584,10 @@ xlog_recover_do_efi_trans( * efd format structure. If we find it, we remove the efi from the * AIL and free it. */ -STATIC void -xlog_recover_do_efd_trans( +STATIC int +xlog_recover_efd_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { xfs_efd_log_format_t *efd_formatp; xfs_efi_log_item_t *efip = NULL; @@ -2750,10 +2596,6 @@ xlog_recover_do_efd_trans( struct xfs_ail_cursor cur; struct xfs_ail *ailp = log->l_ailp; - if (pass == XLOG_RECOVER_PASS1) { - return; - } - efd_formatp = item->ri_buf[0].i_addr; ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || @@ -2785,62 +2627,6 @@ xlog_recover_do_efd_trans( } xfs_trans_ail_cursor_done(ailp, &cur); spin_unlock(&ailp->xa_lock); -} - -/* - * Perform the transaction - * - * If the transaction modifies a buffer or inode, do it now. Otherwise, - * EFIs and EFDs get queued up by adding entries into the AIL for them. - */ -STATIC int -xlog_recover_do_trans( - xlog_t *log, - xlog_recover_t *trans, - int pass) -{ - int error = 0; - xlog_recover_item_t *item; - - error = xlog_recover_reorder_trans(log, trans, pass); - if (error) - return error; - - list_for_each_entry(item, &trans->r_itemq, ri_list) { - trace_xfs_log_recover_item_recover(log, trans, item, pass); - switch (ITEM_TYPE(item)) { - case XFS_LI_BUF: - error = xlog_recover_do_buffer_trans(log, item, pass); - break; - case XFS_LI_INODE: - error = xlog_recover_do_inode_trans(log, item, pass); - break; - case XFS_LI_EFI: - error = xlog_recover_do_efi_trans(log, item, - trans->r_lsn, pass); - break; - case XFS_LI_EFD: - xlog_recover_do_efd_trans(log, item, pass); - error = 0; - break; - case XFS_LI_DQUOT: - error = xlog_recover_do_dquot_trans(log, item, pass); - break; - case XFS_LI_QUOTAOFF: - error = xlog_recover_do_quotaoff_trans(log, item, - pass); - break; - default: - xlog_warn( - "XFS: invalid item type (%d) xlog_recover_do_trans", ITEM_TYPE(item)); - ASSERT(0); - error = XFS_ERROR(EIO); - break; - } - - if (error) - return error; - } return 0; } @@ -2852,7 +2638,7 @@ xlog_recover_do_trans( */ STATIC void xlog_recover_free_trans( - xlog_recover_t *trans) + struct xlog_recover *trans) { xlog_recover_item_t *item, *n; int i; @@ -2871,17 +2657,95 @@ xlog_recover_free_trans( } STATIC int +xlog_recover_commit_pass1( + struct log *log, + struct xlog_recover *trans, + xlog_recover_item_t *item) +{ + trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); + + switch (ITEM_TYPE(item)) { + case XFS_LI_BUF: + return xlog_recover_buffer_pass1(log, item); + case XFS_LI_QUOTAOFF: + return xlog_recover_quotaoff_pass1(log, item); + case XFS_LI_INODE: + case XFS_LI_EFI: + case XFS_LI_EFD: + case XFS_LI_DQUOT: + /* nothing to do in pass 1 */ + return 0; + default: + xlog_warn( + "XFS: invalid item type (%d) xlog_recover_commit_pass1", + ITEM_TYPE(item)); + ASSERT(0); + return XFS_ERROR(EIO); + } +} + +STATIC int +xlog_recover_commit_pass2( + struct log *log, + struct xlog_recover *trans, + xlog_recover_item_t *item) +{ + trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); + + switch (ITEM_TYPE(item)) { + case XFS_LI_BUF: + return xlog_recover_buffer_pass2(log, item); + case XFS_LI_INODE: + return xlog_recover_inode_pass2(log, item); + case XFS_LI_EFI: + return xlog_recover_efi_pass2(log, item, trans->r_lsn); + case XFS_LI_EFD: + return xlog_recover_efd_pass2(log, item); + case XFS_LI_DQUOT: + return xlog_recover_dquot_pass2(log, item); + case XFS_LI_QUOTAOFF: + /* nothing to do in pass2 */ + return 0; + default: + xlog_warn( + "XFS: invalid item type (%d) xlog_recover_commit_pass2", + ITEM_TYPE(item)); + ASSERT(0); + return XFS_ERROR(EIO); + } +} + +/* + * Perform the transaction. + * + * If the transaction modifies a buffer or inode, do it now. Otherwise, + * EFIs and EFDs get queued up by adding entries into the AIL for them. + */ +STATIC int xlog_recover_commit_trans( - xlog_t *log, - xlog_recover_t *trans, + struct log *log, + struct xlog_recover *trans, int pass) { - int error; + int error = 0; + xlog_recover_item_t *item; hlist_del(&trans->r_list); - if ((error = xlog_recover_do_trans(log, trans, pass))) + + error = xlog_recover_reorder_trans(log, trans, pass); + if (error) return error; - xlog_recover_free_trans(trans); /* no error */ + + list_for_each_entry(item, &trans->r_itemq, ri_list) { + if (pass == XLOG_RECOVER_PASS1) + error = xlog_recover_commit_pass1(log, trans, item); + else + error = xlog_recover_commit_pass2(log, trans, item); + if (error) + return error; + } + + xlog_recover_free_trans(trans); return 0; } @@ -3011,7 +2875,7 @@ xlog_recover_process_efi( xfs_extent_t *extp; xfs_fsblock_t startblock_fsb; - ASSERT(!(efip->efi_flags & XFS_EFI_RECOVERED)); + ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); /* * First check the validity of the extents described by the @@ -3050,7 +2914,7 @@ xlog_recover_process_efi( extp->ext_len); } - efip->efi_flags |= XFS_EFI_RECOVERED; + set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); error = xfs_trans_commit(tp, 0); return error; @@ -3107,7 +2971,7 @@ xlog_recover_process_efis( * Skip EFIs that we've already processed. */ efip = (xfs_efi_log_item_t *)lip; - if (efip->efi_flags & XFS_EFI_RECOVERED) { + if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { lip = xfs_trans_ail_cursor_next(ailp, &cur); continue; } @@ -3724,7 +3588,7 @@ xlog_do_log_recovery( xfs_daddr_t head_blk, xfs_daddr_t tail_blk) { - int error; + int error, i; ASSERT(head_blk != tail_blk); @@ -3732,10 +3596,12 @@ xlog_do_log_recovery( * First do a pass to find all of the cancelled buf log items. * Store them in the buf_cancel_table for use in the second pass. */ - log->l_buf_cancel_table = - (xfs_buf_cancel_t **)kmem_zalloc(XLOG_BC_TABLE_SIZE * - sizeof(xfs_buf_cancel_t*), + log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * + sizeof(struct list_head), KM_SLEEP); + for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) + INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); + error = xlog_do_recovery_pass(log, head_blk, tail_blk, XLOG_RECOVER_PASS1); if (error != 0) { @@ -3754,7 +3620,7 @@ xlog_do_log_recovery( int i; for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) - ASSERT(log->l_buf_cancel_table[i] == NULL); + ASSERT(list_empty(&log->l_buf_cancel_table[i])); } #endif /* DEBUG */ diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index b1498ab..d447aef 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -275,6 +275,7 @@ xfs_free_perag( pag = radix_tree_delete(&mp->m_perag_tree, agno); spin_unlock(&mp->m_perag_lock); ASSERT(pag); + ASSERT(atomic_read(&pag->pag_ref) == 0); call_rcu(&pag->rcu_head, __xfs_free_perag); } } @@ -471,7 +472,7 @@ xfs_initialize_perag( goto out_unwind; pag->pag_agno = index; pag->pag_mount = mp; - rwlock_init(&pag->pag_ici_lock); + spin_lock_init(&pag->pag_ici_lock); mutex_init(&pag->pag_ici_reclaim_lock); INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); spin_lock_init(&pag->pag_buf_lock); @@ -974,6 +975,24 @@ xfs_set_rw_sizes(xfs_mount_t *mp) } /* + * precalculate the low space thresholds for dynamic speculative preallocation. + */ +void +xfs_set_low_space_thresholds( + struct xfs_mount *mp) +{ + int i; + + for (i = 0; i < XFS_LOWSP_MAX; i++) { + __uint64_t space = mp->m_sb.sb_dblocks; + + do_div(space, 100); + mp->m_low_space[i] = space * (i + 1); + } +} + + +/* * Set whether we're using inode alignment. */ STATIC void @@ -1195,6 +1214,9 @@ xfs_mountfs( */ xfs_set_rw_sizes(mp); + /* set the low space thresholds for dynamic preallocation */ + xfs_set_low_space_thresholds(mp); + /* * Set the inode cluster size. * This may still be overridden by the file system diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 5861b49..a62e897 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -103,6 +103,16 @@ extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, xfs_mod_incore_sb(mp, field, delta, rsvd) #endif +/* dynamic preallocation free space thresholds, 5% down to 1% */ +enum { + XFS_LOWSP_1_PCNT = 0, + XFS_LOWSP_2_PCNT, + XFS_LOWSP_3_PCNT, + XFS_LOWSP_4_PCNT, + XFS_LOWSP_5_PCNT, + XFS_LOWSP_MAX, +}; + typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -202,6 +212,8 @@ typedef struct xfs_mount { __int64_t m_update_flags; /* sb flags we need to update on the next remount,rw */ struct shrinker m_inode_shrink; /* inode reclaim shrinker */ + int64_t m_low_space[XFS_LOWSP_MAX]; + /* low free space thresholds */ } xfs_mount_t; /* @@ -379,6 +391,8 @@ extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); extern int xfs_dev_is_read_only(struct xfs_mount *, char *); +extern void xfs_set_low_space_thresholds(struct xfs_mount *); + #endif /* __KERNEL__ */ extern void xfs_mod_sb(struct xfs_trans *, __int64_t); diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c index 45ce15d..edfa178 100644 --- a/fs/xfs/xfs_mru_cache.c +++ b/fs/xfs/xfs_mru_cache.c @@ -408,7 +408,7 @@ xfs_mru_cache_flush( spin_lock(&mru->lock); if (mru->queued) { spin_unlock(&mru->lock); - cancel_rearming_delayed_workqueue(xfs_mru_reap_wq, &mru->work); + cancel_delayed_work_sync(&mru->work); spin_lock(&mru->lock); } diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h index e0e64b1..9bb6eda 100644 --- a/fs/xfs/xfs_quota.h +++ b/fs/xfs/xfs_quota.h @@ -346,8 +346,17 @@ xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid, #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta) #define xfs_trans_apply_dquot_deltas(tp) #define xfs_trans_unreserve_and_mod_dquots(tp) -#define xfs_trans_reserve_quota_nblks(tp, ip, nblks, ninos, flags) (0) -#define xfs_trans_reserve_quota_bydquots(tp, mp, u, g, nb, ni, fl) (0) +static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, + struct xfs_inode *ip, long nblks, long ninos, uint flags) +{ + return 0; +} +static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, + struct xfs_mount *mp, struct xfs_dquot *udqp, + struct xfs_dquot *gdqp, long nblks, long nions, uint flags) +{ + return 0; +} #define xfs_qm_vop_create_dqattach(tp, ip, u, g) #define xfs_qm_vop_rename_dqattach(it) (0) #define xfs_qm_vop_chown(tp, ip, old, new) (NULL) @@ -357,11 +366,14 @@ xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid, #define xfs_qm_dqdetach(ip) #define xfs_qm_dqrele(d) #define xfs_qm_statvfs(ip, s) -#define xfs_qm_sync(mp, fl) (0) +static inline int xfs_qm_sync(struct xfs_mount *mp, int flags) +{ + return 0; +} #define xfs_qm_newmount(mp, a, b) (0) #define xfs_qm_mount_quotas(mp) #define xfs_qm_unmount(mp) -#define xfs_qm_unmount_quotas(mp) (0) +#define xfs_qm_unmount_quotas(mp) #endif /* CONFIG_XFS_QUOTA */ #define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \ diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c index d2af0a8..77a5989 100644 --- a/fs/xfs/xfs_rename.c +++ b/fs/xfs/xfs_rename.c @@ -297,6 +297,7 @@ xfs_rename( * it and some incremental backup programs won't work without it. */ xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); + xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); /* * Adjust the link count on src_dp. This is necessary when diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index f6d956b..f80a067 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -1350,7 +1350,7 @@ xfs_trans_fill_vecs( * they could be immediately flushed and we'd have to race with the flusher * trying to pull the item from the AIL as we add it. */ -void +static void xfs_trans_item_committed( struct xfs_log_item *lip, xfs_lsn_t commit_lsn, @@ -1425,6 +1425,83 @@ xfs_trans_committed( xfs_trans_free(tp); } +static inline void +xfs_log_item_batch_insert( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, + xfs_lsn_t commit_lsn) +{ + int i; + + spin_lock(&ailp->xa_lock); + /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ + xfs_trans_ail_update_bulk(ailp, log_items, nr_items, commit_lsn); + + for (i = 0; i < nr_items; i++) + IOP_UNPIN(log_items[i], 0); +} + +/* + * Bulk operation version of xfs_trans_committed that takes a log vector of + * items to insert into the AIL. This uses bulk AIL insertion techniques to + * minimise lock traffic. + */ +void +xfs_trans_committed_bulk( + struct xfs_ail *ailp, + struct xfs_log_vec *log_vector, + xfs_lsn_t commit_lsn, + int aborted) +{ +#define LOG_ITEM_BATCH_SIZE 32 + struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; + struct xfs_log_vec *lv; + int i = 0; + + /* unpin all the log items */ + for (lv = log_vector; lv; lv = lv->lv_next ) { + struct xfs_log_item *lip = lv->lv_item; + xfs_lsn_t item_lsn; + + if (aborted) + lip->li_flags |= XFS_LI_ABORTED; + item_lsn = IOP_COMMITTED(lip, commit_lsn); + + /* item_lsn of -1 means the item was freed */ + if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) + continue; + + if (item_lsn != commit_lsn) { + + /* + * Not a bulk update option due to unusual item_lsn. + * Push into AIL immediately, rechecking the lsn once + * we have the ail lock. Then unpin the item. + */ + spin_lock(&ailp->xa_lock); + if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) + xfs_trans_ail_update(ailp, lip, item_lsn); + else + spin_unlock(&ailp->xa_lock); + IOP_UNPIN(lip, 0); + continue; + } + + /* Item is a candidate for bulk AIL insert. */ + log_items[i++] = lv->lv_item; + if (i >= LOG_ITEM_BATCH_SIZE) { + xfs_log_item_batch_insert(ailp, log_items, + LOG_ITEM_BATCH_SIZE, commit_lsn); + i = 0; + } + } + + /* make sure we insert the remainder! */ + if (i) + xfs_log_item_batch_insert(ailp, log_items, i, commit_lsn); +} + /* * Called from the trans_commit code when we notice that * the filesystem is in the middle of a forced shutdown. diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h index 246286b..c2042b7 100644 --- a/fs/xfs/xfs_trans.h +++ b/fs/xfs/xfs_trans.h @@ -294,8 +294,8 @@ struct xfs_log_item_desc { #define XFS_ALLOC_BTREE_REF 2 #define XFS_BMAP_BTREE_REF 2 #define XFS_DIR_BTREE_REF 2 +#define XFS_INO_REF 2 #define XFS_ATTR_BTREE_REF 1 -#define XFS_INO_REF 1 #define XFS_DQUOT_REF 1 #ifdef __KERNEL__ diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index dc90695..c5bbbc4 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -28,8 +28,8 @@ #include "xfs_trans_priv.h" #include "xfs_error.h" -STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); -STATIC xfs_log_item_t * xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); +STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t); +STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); STATIC xfs_log_item_t * xfs_ail_next(struct xfs_ail *, xfs_log_item_t *); @@ -449,129 +449,152 @@ xfs_trans_unlocked_item( xfs_log_move_tail(ailp->xa_mount, 1); } /* xfs_trans_unlocked_item */ - /* - * Update the position of the item in the AIL with the new - * lsn. If it is not yet in the AIL, add it. Otherwise, move - * it to its new position by removing it and re-adding it. + * xfs_trans_ail_update - bulk AIL insertion operation. + * + * @xfs_trans_ail_update takes an array of log items that all need to be + * positioned at the same LSN in the AIL. If an item is not in the AIL, it will + * be added. Otherwise, it will be repositioned by removing it and re-adding + * it to the AIL. If we move the first item in the AIL, update the log tail to + * match the new minimum LSN in the AIL. * - * Wakeup anyone with an lsn less than the item's lsn. If the item - * we move in the AIL is the minimum one, update the tail lsn in the - * log manager. + * This function takes the AIL lock once to execute the update operations on + * all the items in the array, and as such should not be called with the AIL + * lock held. As a result, once we have the AIL lock, we need to check each log + * item LSN to confirm it needs to be moved forward in the AIL. * - * This function must be called with the AIL lock held. The lock - * is dropped before returning. + * To optimise the insert operation, we delete all the items from the AIL in + * the first pass, moving them into a temporary list, then splice the temporary + * list into the correct position in the AIL. This avoids needing to do an + * insert operation on every item. + * + * This function must be called with the AIL lock held. The lock is dropped + * before returning. */ void -xfs_trans_ail_update( - struct xfs_ail *ailp, - xfs_log_item_t *lip, - xfs_lsn_t lsn) __releases(ailp->xa_lock) +xfs_trans_ail_update_bulk( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, + xfs_lsn_t lsn) __releases(ailp->xa_lock) { - xfs_log_item_t *dlip = NULL; - xfs_log_item_t *mlip; /* ptr to minimum lip */ + xfs_log_item_t *mlip; xfs_lsn_t tail_lsn; + int mlip_changed = 0; + int i; + LIST_HEAD(tmp); mlip = xfs_ail_min(ailp); - if (lip->li_flags & XFS_LI_IN_AIL) { - dlip = xfs_ail_delete(ailp, lip); - ASSERT(dlip == lip); - xfs_trans_ail_cursor_clear(ailp, dlip); - } else { - lip->li_flags |= XFS_LI_IN_AIL; + for (i = 0; i < nr_items; i++) { + struct xfs_log_item *lip = log_items[i]; + if (lip->li_flags & XFS_LI_IN_AIL) { + /* check if we really need to move the item */ + if (XFS_LSN_CMP(lsn, lip->li_lsn) <= 0) + continue; + + xfs_ail_delete(ailp, lip); + if (mlip == lip) + mlip_changed = 1; + } else { + lip->li_flags |= XFS_LI_IN_AIL; + } + lip->li_lsn = lsn; + list_add(&lip->li_ail, &tmp); } - lip->li_lsn = lsn; - xfs_ail_insert(ailp, lip); + xfs_ail_splice(ailp, &tmp, lsn); - if (mlip == dlip) { - mlip = xfs_ail_min(ailp); - /* - * It is not safe to access mlip after the AIL lock is - * dropped, so we must get a copy of li_lsn before we do - * so. This is especially important on 32-bit platforms - * where accessing and updating 64-bit values like li_lsn - * is not atomic. - */ - tail_lsn = mlip->li_lsn; - spin_unlock(&ailp->xa_lock); - xfs_log_move_tail(ailp->xa_mount, tail_lsn); - } else { + if (!mlip_changed) { spin_unlock(&ailp->xa_lock); + return; } - -} /* xfs_trans_update_ail */ + /* + * It is not safe to access mlip after the AIL lock is dropped, so we + * must get a copy of li_lsn before we do so. This is especially + * important on 32-bit platforms where accessing and updating 64-bit + * values like li_lsn is not atomic. + */ + mlip = xfs_ail_min(ailp); + tail_lsn = mlip->li_lsn; + spin_unlock(&ailp->xa_lock); + xfs_log_move_tail(ailp->xa_mount, tail_lsn); +} /* - * Delete the given item from the AIL. It must already be in - * the AIL. + * xfs_trans_ail_delete_bulk - remove multiple log items from the AIL * - * Wakeup anyone with an lsn less than item's lsn. If the item - * we delete in the AIL is the minimum one, update the tail lsn in the - * log manager. + * @xfs_trans_ail_delete_bulk takes an array of log items that all need to + * removed from the AIL. The caller is already holding the AIL lock, and done + * all the checks necessary to ensure the items passed in via @log_items are + * ready for deletion. This includes checking that the items are in the AIL. * - * Clear the IN_AIL flag from the item, reset its lsn to 0, and - * bump the AIL's generation count to indicate that the tree - * has changed. + * For each log item to be removed, unlink it from the AIL, clear the IN_AIL + * flag from the item and reset the item's lsn to 0. If we remove the first + * item in the AIL, update the log tail to match the new minimum LSN in the + * AIL. * - * This function must be called with the AIL lock held. The lock - * is dropped before returning. + * This function will not drop the AIL lock until all items are removed from + * the AIL to minimise the amount of lock traffic on the AIL. This does not + * greatly increase the AIL hold time, but does significantly reduce the amount + * of traffic on the lock, especially during IO completion. + * + * This function must be called with the AIL lock held. The lock is dropped + * before returning. */ void -xfs_trans_ail_delete( - struct xfs_ail *ailp, - xfs_log_item_t *lip) __releases(ailp->xa_lock) +xfs_trans_ail_delete_bulk( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items) __releases(ailp->xa_lock) { - xfs_log_item_t *dlip; xfs_log_item_t *mlip; xfs_lsn_t tail_lsn; + int mlip_changed = 0; + int i; - if (lip->li_flags & XFS_LI_IN_AIL) { - mlip = xfs_ail_min(ailp); - dlip = xfs_ail_delete(ailp, lip); - ASSERT(dlip == lip); - xfs_trans_ail_cursor_clear(ailp, dlip); - + mlip = xfs_ail_min(ailp); - lip->li_flags &= ~XFS_LI_IN_AIL; - lip->li_lsn = 0; + for (i = 0; i < nr_items; i++) { + struct xfs_log_item *lip = log_items[i]; + if (!(lip->li_flags & XFS_LI_IN_AIL)) { + struct xfs_mount *mp = ailp->xa_mount; - if (mlip == dlip) { - mlip = xfs_ail_min(ailp); - /* - * It is not safe to access mlip after the AIL lock - * is dropped, so we must get a copy of li_lsn - * before we do so. This is especially important - * on 32-bit platforms where accessing and updating - * 64-bit values like li_lsn is not atomic. - */ - tail_lsn = mlip ? mlip->li_lsn : 0; - spin_unlock(&ailp->xa_lock); - xfs_log_move_tail(ailp->xa_mount, tail_lsn); - } else { spin_unlock(&ailp->xa_lock); + if (!XFS_FORCED_SHUTDOWN(mp)) { + xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp, + "%s: attempting to delete a log item that is not in the AIL", + __func__); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); + } + return; } + + xfs_ail_delete(ailp, lip); + lip->li_flags &= ~XFS_LI_IN_AIL; + lip->li_lsn = 0; + if (mlip == lip) + mlip_changed = 1; } - else { - /* - * If the file system is not being shutdown, we are in - * serious trouble if we get to this stage. - */ - struct xfs_mount *mp = ailp->xa_mount; + if (!mlip_changed) { spin_unlock(&ailp->xa_lock); - if (!XFS_FORCED_SHUTDOWN(mp)) { - xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp, - "%s: attempting to delete a log item that is not in the AIL", - __func__); - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); - } + return; } -} - + /* + * It is not safe to access mlip after the AIL lock is dropped, so we + * must get a copy of li_lsn before we do so. This is especially + * important on 32-bit platforms where accessing and updating 64-bit + * values like li_lsn is not atomic. It is possible we've emptied the + * AIL here, so if that is the case, pass an LSN of 0 to the tail move. + */ + mlip = xfs_ail_min(ailp); + tail_lsn = mlip ? mlip->li_lsn : 0; + spin_unlock(&ailp->xa_lock); + xfs_log_move_tail(ailp->xa_mount, tail_lsn); +} /* * The active item list (AIL) is a doubly linked list of log @@ -623,16 +646,13 @@ xfs_trans_ail_destroy( } /* - * Insert the given log item into the AIL. - * We almost always insert at the end of the list, so on inserts - * we search from the end of the list to find where the - * new item belongs. + * splice the log item list into the AIL at the given LSN. */ STATIC void -xfs_ail_insert( +xfs_ail_splice( struct xfs_ail *ailp, - xfs_log_item_t *lip) -/* ARGSUSED */ + struct list_head *list, + xfs_lsn_t lsn) { xfs_log_item_t *next_lip; @@ -640,39 +660,33 @@ xfs_ail_insert( * If the list is empty, just insert the item. */ if (list_empty(&ailp->xa_ail)) { - list_add(&lip->li_ail, &ailp->xa_ail); + list_splice(list, &ailp->xa_ail); return; } list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) { - if (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0) + if (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0) break; } ASSERT((&next_lip->li_ail == &ailp->xa_ail) || - (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0)); - - list_add(&lip->li_ail, &next_lip->li_ail); + (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0)); - xfs_ail_check(ailp, lip); + list_splice_init(list, &next_lip->li_ail); return; } /* * Delete the given item from the AIL. Return a pointer to the item. */ -/*ARGSUSED*/ -STATIC xfs_log_item_t * +STATIC void xfs_ail_delete( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { xfs_ail_check(ailp, lip); - list_del(&lip->li_ail); - - return lip; + xfs_trans_ail_cursor_clear(ailp, lip); } /* @@ -682,7 +696,6 @@ xfs_ail_delete( STATIC xfs_log_item_t * xfs_ail_min( struct xfs_ail *ailp) -/* ARGSUSED */ { if (list_empty(&ailp->xa_ail)) return NULL; @@ -699,7 +712,6 @@ STATIC xfs_log_item_t * xfs_ail_next( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { if (lip->li_ail.next == &ailp->xa_ail) return NULL; diff --git a/fs/xfs/xfs_trans_extfree.c b/fs/xfs/xfs_trans_extfree.c index f783d5e..f7590f5 100644 --- a/fs/xfs/xfs_trans_extfree.c +++ b/fs/xfs/xfs_trans_extfree.c @@ -69,12 +69,16 @@ xfs_trans_log_efi_extent(xfs_trans_t *tp, tp->t_flags |= XFS_TRANS_DIRTY; efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY; - next_extent = efip->efi_next_extent; + /* + * atomic_inc_return gives us the value after the increment; + * we want to use it as an array index so we need to subtract 1 from + * it. + */ + next_extent = atomic_inc_return(&efip->efi_next_extent) - 1; ASSERT(next_extent < efip->efi_format.efi_nextents); extp = &(efip->efi_format.efi_extents[next_extent]); extp->ext_start = start_block; extp->ext_len = ext_len; - efip->efi_next_extent++; } diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index 62da86c..35162c2 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -22,15 +22,17 @@ struct xfs_log_item; struct xfs_log_item_desc; struct xfs_mount; struct xfs_trans; +struct xfs_ail; +struct xfs_log_vec; void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); void xfs_trans_del_item(struct xfs_log_item *); void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, int flags); -void xfs_trans_item_committed(struct xfs_log_item *lip, - xfs_lsn_t commit_lsn, int aborted); void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); +void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv, + xfs_lsn_t commit_lsn, int aborted); /* * AIL traversal cursor. * @@ -73,12 +75,29 @@ struct xfs_ail { /* * From xfs_trans_ail.c */ -void xfs_trans_ail_update(struct xfs_ail *ailp, - struct xfs_log_item *lip, xfs_lsn_t lsn) - __releases(ailp->xa_lock); -void xfs_trans_ail_delete(struct xfs_ail *ailp, - struct xfs_log_item *lip) - __releases(ailp->xa_lock); +void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, int nr_items, + xfs_lsn_t lsn) __releases(ailp->xa_lock); +static inline void +xfs_trans_ail_update( + struct xfs_ail *ailp, + struct xfs_log_item *lip, + xfs_lsn_t lsn) __releases(ailp->xa_lock) +{ + xfs_trans_ail_update_bulk(ailp, &lip, 1, lsn); +} + +void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, int nr_items) + __releases(ailp->xa_lock); +static inline void +xfs_trans_ail_delete( + struct xfs_ail *ailp, + xfs_log_item_t *lip) __releases(ailp->xa_lock) +{ + xfs_trans_ail_delete_bulk(ailp, &lip, 1); +} + void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); void xfs_trans_unlocked_item(struct xfs_ail *, xfs_log_item_t *); diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 8e4a63c4..d8e6f8c 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -964,29 +964,48 @@ xfs_release( xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); } - if (ip->i_d.di_nlink != 0) { - if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && - ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || - ip->i_delayed_blks > 0)) && - (ip->i_df.if_flags & XFS_IFEXTENTS)) && - (!(ip->i_d.di_flags & - (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + if (ip->i_d.di_nlink == 0) + return 0; - /* - * If we can't get the iolock just skip truncating - * the blocks past EOF because we could deadlock - * with the mmap_sem otherwise. We'll get another - * chance to drop them once the last reference to - * the inode is dropped, so we'll never leak blocks - * permanently. - */ - error = xfs_free_eofblocks(mp, ip, - XFS_FREE_EOF_TRYLOCK); - if (error) - return error; - } - } + if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && + ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || + ip->i_delayed_blks > 0)) && + (ip->i_df.if_flags & XFS_IFEXTENTS)) && + (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + /* + * If we can't get the iolock just skip truncating the blocks + * past EOF because we could deadlock with the mmap_sem + * otherwise. We'll get another chance to drop them once the + * last reference to the inode is dropped, so we'll never leak + * blocks permanently. + * + * Further, check if the inode is being opened, written and + * closed frequently and we have delayed allocation blocks + * oustanding (e.g. streaming writes from the NFS server), + * truncating the blocks past EOF will cause fragmentation to + * occur. + * + * In this case don't do the truncation, either, but we have to + * be careful how we detect this case. Blocks beyond EOF show + * up as i_delayed_blks even when the inode is clean, so we + * need to truncate them away first before checking for a dirty + * release. Hence on the first dirty close we will still remove + * the speculative allocation, but after that we will leave it + * in place. + */ + if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) + return 0; + + error = xfs_free_eofblocks(mp, ip, + XFS_FREE_EOF_TRYLOCK); + if (error) + return error; + + /* delalloc blocks after truncation means it really is dirty */ + if (ip->i_delayed_blks) + xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); + } return 0; } |
