diff options
| -rw-r--r-- | fs/reiserfs/super.c | 7 | ||||
| -rw-r--r-- | fs/reiserfs/xattr.c | 467 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_acl.c | 79 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_security.c | 26 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_trusted.c | 45 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_user.c | 31 | ||||
| -rw-r--r-- | include/linux/reiserfs_acl.h | 16 | ||||
| -rw-r--r-- | include/linux/reiserfs_fs_sb.h | 3 | ||||
| -rw-r--r-- | include/linux/reiserfs_xattr.h | 25 |
9 files changed, 258 insertions, 441 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 6d10f81..4a1e163 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -2263,9 +2263,6 @@ static int __init init_reiserfs_fs(void) return ret; } - if ((ret = reiserfs_xattr_register_handlers())) - goto failed_reiserfs_xattr_register_handlers; - reiserfs_proc_info_global_init(); reiserfs_proc_register_global("version", reiserfs_global_version_in_proc); @@ -2276,9 +2273,6 @@ static int __init init_reiserfs_fs(void) return 0; } - reiserfs_xattr_unregister_handlers(); - - failed_reiserfs_xattr_register_handlers: reiserfs_proc_unregister_global("version"); reiserfs_proc_info_global_done(); destroy_inodecache(); @@ -2288,7 +2282,6 @@ static int __init init_reiserfs_fs(void) static void __exit exit_reiserfs_fs(void) { - reiserfs_xattr_unregister_handlers(); reiserfs_proc_unregister_global("version"); reiserfs_proc_info_global_done(); unregister_filesystem(&reiserfs_fs_type); diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index 8d7e5d9..d3ce274 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -53,7 +53,6 @@ #define PRIVROOT_NAME ".reiserfs_priv" #define XAROOT_NAME "xattrs" -static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char *); /* Helpers for inode ops. We do this so that we don't have all the VFS * overhead and also for proper i_mutex annotation. @@ -110,7 +109,6 @@ static int xattr_rmdir(struct inode *dir, struct dentry *dentry) return error; } - #define xattr_may_create(flags) (!flags || flags & XATTR_CREATE) /* Returns and possibly creates the xattr dir. */ @@ -339,14 +337,17 @@ int xattr_readdir(struct inode *inode, filldir_t filler, void *buf) return res; } -/* expects xadir->d_inode->i_mutex to be locked */ +/* The following are side effects of other operations that aren't explicitly + * modifying extended attributes. This includes operations such as permissions + * or ownership changes, object deletions, etc. */ + static int -__reiserfs_xattr_del(struct dentry *xadir, const char *name, int namelen) +reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen, + loff_t offset, u64 ino, unsigned int d_type) { + struct dentry *xadir = (struct dentry *)buf; struct dentry *dentry; - struct inode *dir = xadir->d_inode; int err = 0; - struct reiserfs_xattr_handler *xah; dentry = lookup_one_len(name, xadir, namelen); if (IS_ERR(dentry)) { @@ -361,28 +362,7 @@ __reiserfs_xattr_del(struct dentry *xadir, const char *name, int namelen) if (S_ISDIR(dentry->d_inode->i_mode)) goto out_file; - if (!IS_PRIVATE(dentry->d_inode)) { - reiserfs_error(dir->i_sb, "jdm-20003", - "OID %08x [%.*s/%.*s] doesn't have " - "priv flag set [parent is %sset].", - le32_to_cpu(INODE_PKEY(dentry->d_inode)-> - k_objectid), xadir->d_name.len, - xadir->d_name.name, namelen, name, - IS_PRIVATE(xadir->d_inode) ? "" : - "not "); - dput(dentry); - return -EIO; - } - - /* Deletion pre-operation */ - xah = find_xattr_handler_prefix(name); - if (xah && xah->del) { - err = xah->del(dentry->d_inode, name); - if (err) - goto out; - } - - err = xattr_unlink(dir, dentry); + err = xattr_unlink(xadir->d_inode, dentry); out_file: dput(dentry); @@ -391,20 +371,6 @@ out: return err; } -/* The following are side effects of other operations that aren't explicitly - * modifying extended attributes. This includes operations such as permissions - * or ownership changes, object deletions, etc. */ - -static int -reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen, - loff_t offset, u64 ino, unsigned int d_type) -{ - struct dentry *xadir = (struct dentry *)buf; - - return __reiserfs_xattr_del(xadir, name, namelen); - -} - /* This is called w/ inode->i_mutex downed */ int reiserfs_delete_xattrs(struct inode *inode) { @@ -541,14 +507,11 @@ out: } #ifdef CONFIG_REISERFS_FS_XATTR -static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char - *prefix); - /* Returns a dentry corresponding to a specific extended attribute file * for the inode. If flags allow, the file is created. Otherwise, a * valid or negative dentry, or an error is returned. */ -static struct dentry *get_xa_file_dentry(const struct inode *inode, - const char *name, int flags) +static struct dentry *xattr_lookup(struct inode *inode, const char *name, + int flags) { struct dentry *xadir, *xafile; int err = 0; @@ -623,6 +586,45 @@ int reiserfs_commit_write(struct file *f, struct page *page, int reiserfs_prepare_write(struct file *f, struct page *page, unsigned from, unsigned to); +static void update_ctime(struct inode *inode) +{ + struct timespec now = current_fs_time(inode->i_sb); + if (hlist_unhashed(&inode->i_hash) || !inode->i_nlink || + timespec_equal(&inode->i_ctime, &now)) + return; + + inode->i_ctime = CURRENT_TIME_SEC; + mark_inode_dirty(inode); +} + +static int lookup_and_delete_xattr(struct inode *inode, const char *name) +{ + int err = 0; + struct dentry *dentry, *xadir; + + xadir = open_xa_dir(inode, XATTR_REPLACE); + if (IS_ERR(xadir)) + return PTR_ERR(xadir); + + dentry = lookup_one_len(name, xadir, strlen(name)); + if (IS_ERR(dentry)) { + err = PTR_ERR(dentry); + goto out_dput; + } + + if (dentry->d_inode) { + mutex_lock_nested(&xadir->d_inode->i_mutex, I_MUTEX_XATTR); + err = xattr_unlink(xadir->d_inode, dentry); + mutex_unlock(&xadir->d_inode->i_mutex); + update_ctime(inode); + } + + dput(dentry); +out_dput: + dput(xadir); + return err; +} + /* Generic extended attribute operations that can be used by xa plugins */ @@ -630,8 +632,8 @@ int reiserfs_prepare_write(struct file *f, struct page *page, * inode->i_mutex: down */ int -reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, - size_t buffer_size, int flags) +__reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, + size_t buffer_size, int flags) { int err = 0; struct dentry *dentry; @@ -639,37 +641,22 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, char *data; size_t file_pos = 0; size_t buffer_pos = 0; - struct iattr newattrs; + size_t new_size; __u32 xahash = 0; if (get_inode_sd_version(inode) == STAT_DATA_V1) return -EOPNOTSUPP; if (!buffer) - return reiserfs_xattr_del(inode, name); + return lookup_and_delete_xattr(inode, name); - dentry = get_xa_file_dentry(inode, name, flags); - if (IS_ERR(dentry)) { - err = PTR_ERR(dentry); - goto out; - } + dentry = xattr_lookup(inode, name, flags); + if (IS_ERR(dentry)) + return PTR_ERR(dentry); down_write(&REISERFS_I(inode)->i_xattr_sem); xahash = xattr_hash(buffer, buffer_size); - - /* Resize it so we're ok to write there */ - newattrs.ia_size = buffer_size; - newattrs.ia_ctime = current_fs_time(inode->i_sb); - newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME; - mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR); - down_write(&dentry->d_inode->i_alloc_sem); - err = reiserfs_setattr(dentry, &newattrs); - up_write(&dentry->d_inode->i_alloc_sem); - mutex_unlock(&dentry->d_inode->i_mutex); - if (err) - goto out_filp; - while (buffer_pos < buffer_size || buffer_pos == 0) { size_t chunk; size_t skip = 0; @@ -682,7 +669,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, page = reiserfs_get_page(dentry->d_inode, file_pos); if (IS_ERR(page)) { err = PTR_ERR(page); - goto out_filp; + goto out_unlock; } lock_page(page); @@ -716,20 +703,33 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, break; } - /* We can't mark the inode dirty if it's not hashed. This is the case - * when we're inheriting the default ACL. If we dirty it, the inode - * gets marked dirty, but won't (ever) make it onto the dirty list until - * it's synced explicitly to clear I_DIRTY. This is bad. */ - if (!hlist_unhashed(&inode->i_hash)) { - inode->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(inode); - } - - out_filp: + new_size = buffer_size + sizeof(struct reiserfs_xattr_header); + if (!err && new_size < i_size_read(dentry->d_inode)) { + struct iattr newattrs = { + .ia_ctime = current_fs_time(inode->i_sb), + .ia_size = buffer_size, + .ia_valid = ATTR_SIZE | ATTR_CTIME, + }; + mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_XATTR); + down_write(&dentry->d_inode->i_alloc_sem); + err = reiserfs_setattr(dentry, &newattrs); + up_write(&dentry->d_inode->i_alloc_sem); + mutex_unlock(&dentry->d_inode->i_mutex); + } else + update_ctime(inode); +out_unlock: up_write(&REISERFS_I(inode)->i_xattr_sem); dput(dentry); + return err; +} - out: +int +reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, + size_t buffer_size, int flags) +{ + int err = __reiserfs_xattr_set(inode, name, buffer, buffer_size, flags); + if (err == -ENODATA) + err = 0; return err; } @@ -737,7 +737,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer, * inode->i_mutex: down */ int -reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer, +reiserfs_xattr_get(struct inode *inode, const char *name, void *buffer, size_t buffer_size) { ssize_t err = 0; @@ -756,7 +756,7 @@ reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer, if (get_inode_sd_version(inode) == STAT_DATA_V1) return -EOPNOTSUPP; - dentry = get_xa_file_dentry(inode, name, XATTR_REPLACE); + dentry = xattr_lookup(inode, name, XATTR_REPLACE); if (IS_ERR(dentry)) { err = PTR_ERR(dentry); goto out; @@ -837,32 +837,53 @@ out: return err; } -int reiserfs_xattr_del(struct inode *inode, const char *name) -{ - struct dentry *dir; - int err; +/* Actual operations that are exported to VFS-land */ +struct xattr_handler *reiserfs_xattr_handlers[] = { + &reiserfs_xattr_user_handler, + &reiserfs_xattr_trusted_handler, +#ifdef CONFIG_REISERFS_FS_SECURITY + &reiserfs_xattr_security_handler, +#endif +#ifdef CONFIG_REISERFS_FS_POSIX_ACL + &reiserfs_posix_acl_access_handler, + &reiserfs_posix_acl_default_handler, +#endif + NULL +}; - dir = open_xa_dir(inode, XATTR_REPLACE); - if (IS_ERR(dir)) { - err = PTR_ERR(dir); - goto out; - } +/* + * In order to implement different sets of xattr operations for each xattr + * prefix with the generic xattr API, a filesystem should create a + * null-terminated array of struct xattr_handler (one for each prefix) and + * hang a pointer to it off of the s_xattr field of the superblock. + * + * The generic_fooxattr() functions will use this list to dispatch xattr + * operations to the correct xattr_handler. + */ +#define for_each_xattr_handler(handlers, handler) \ + for ((handler) = *(handlers)++; \ + (handler) != NULL; \ + (handler) = *(handlers)++) - mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR); - err = __reiserfs_xattr_del(dir, name, strlen(name)); - mutex_unlock(&dir->d_inode->i_mutex); - dput(dir); +/* This is the implementation for the xattr plugin infrastructure */ +static inline struct xattr_handler * +find_xattr_handler_prefix(struct xattr_handler **handlers, + const char *name) +{ + struct xattr_handler *xah; - if (!err) { - inode->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(inode); + if (!handlers) + return NULL; + + for_each_xattr_handler(handlers, xah) { + if (strncmp(xah->prefix, name, strlen(xah->prefix)) == 0) + break; } - out: - return err; + return xah; } -/* Actual operations that are exported to VFS-land */ + /* * Inode operation getxattr() */ @@ -870,15 +891,15 @@ ssize_t reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer, size_t size) { - struct reiserfs_xattr_handler *xah = find_xattr_handler_prefix(name); - int err; + struct inode *inode = dentry->d_inode; + struct xattr_handler *handler; - if (!xah || !reiserfs_xattrs(dentry->d_sb) || - get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1) + handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name); + + if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1) return -EOPNOTSUPP; - err = xah->get(dentry->d_inode, name, buffer, size); - return err; + return handler->get(inode, name, buffer, size); } /* @@ -890,15 +911,15 @@ int reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { - struct reiserfs_xattr_handler *xah = find_xattr_handler_prefix(name); - int err; + struct inode *inode = dentry->d_inode; + struct xattr_handler *handler; - if (!xah || !reiserfs_xattrs(dentry->d_sb) || - get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1) + handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name); + + if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1) return -EOPNOTSUPP; - err = xah->set(dentry->d_inode, name, value, size, flags); - return err; + return handler->set(inode, name, value, size, flags); } /* @@ -908,71 +929,65 @@ reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value, */ int reiserfs_removexattr(struct dentry *dentry, const char *name) { - int err; - struct reiserfs_xattr_handler *xah = find_xattr_handler_prefix(name); + struct inode *inode = dentry->d_inode; + struct xattr_handler *handler; + handler = find_xattr_handler_prefix(inode->i_sb->s_xattr, name); - if (!xah || !reiserfs_xattrs(dentry->d_sb) || - get_inode_sd_version(dentry->d_inode) == STAT_DATA_V1) + if (!handler || get_inode_sd_version(inode) == STAT_DATA_V1) return -EOPNOTSUPP; - err = reiserfs_xattr_del(dentry->d_inode, name); - - dentry->d_inode->i_ctime = CURRENT_TIME_SEC; - mark_inode_dirty(dentry->d_inode); - - return err; + return handler->set(inode, name, NULL, 0, XATTR_REPLACE); } -/* This is what filldir will use: - * r_pos will always contain the amount of space required for the entire - * list. If r_pos becomes larger than r_size, we need more space and we - * return an error indicating this. If r_pos is less than r_size, then we've - * filled the buffer successfully and we return success */ -struct reiserfs_listxattr_buf { - int r_pos; - int r_size; - char *r_buf; - struct inode *r_inode; +struct listxattr_buf { + size_t size; + size_t pos; + char *buf; + struct inode *inode; }; -static int -reiserfs_listxattr_filler(void *buf, const char *name, int namelen, - loff_t offset, u64 ino, unsigned int d_type) +static int listxattr_filler(void *buf, const char *name, int namelen, + loff_t offset, u64 ino, unsigned int d_type) { - struct reiserfs_listxattr_buf *b = (struct reiserfs_listxattr_buf *)buf; - int len = 0; - if (name[0] != '.' - || (namelen != 1 && (name[1] != '.' || namelen != 2))) { - struct reiserfs_xattr_handler *xah = - find_xattr_handler_prefix(name); - if (!xah) - return 0; /* Unsupported xattr name, skip it */ - - /* We call ->list() twice because the operation isn't required to just - * return the name back - we want to make sure we have enough space */ - len += xah->list(b->r_inode, name, namelen, NULL); - - if (len) { - if (b->r_pos + len + 1 <= b->r_size) { - char *p = b->r_buf + b->r_pos; - p += xah->list(b->r_inode, name, namelen, p); - *p++ = '\0'; - } - b->r_pos += len + 1; + struct listxattr_buf *b = (struct listxattr_buf *)buf; + size_t size; + if (name[0] != '.' || + (namelen != 1 && (name[1] != '.' || namelen != 2))) { + struct xattr_handler *handler; + handler = find_xattr_handler_prefix(b->inode->i_sb->s_xattr, + name); + if (!handler) /* Unsupported xattr name */ + return 0; + if (b->buf) { + size = handler->list(b->inode, b->buf + b->pos, + b->size, name, namelen); + if (size > b->size) + return -ERANGE; + } else { + size = handler->list(b->inode, NULL, 0, name, namelen); } - } + b->pos += size; + } return 0; } /* * Inode operation listxattr() + * + * We totally ignore the generic listxattr here because it would be stupid + * not to. Since the xattrs are organized in a directory, we can just + * readdir to find them. */ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size) { struct dentry *dir; int err = 0; - struct reiserfs_listxattr_buf buf; + struct listxattr_buf buf = { + .inode = dentry->d_inode, + .buf = buffer, + .size = buffer ? size : 0, + }; if (!dentry->d_inode) return -EINVAL; @@ -985,120 +1000,22 @@ ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size) if (IS_ERR(dir)) { err = PTR_ERR(dir); if (err == -ENODATA) - err = 0; /* Not an error if there aren't any xattrs */ + err = 0; /* Not an error if there aren't any xattrs */ goto out; } - buf.r_buf = buffer; - buf.r_size = buffer ? size : 0; - buf.r_pos = 0; - buf.r_inode = dentry->d_inode; - mutex_lock_nested(&dir->d_inode->i_mutex, I_MUTEX_XATTR); - err = xattr_readdir(dir->d_inode, reiserfs_listxattr_filler, &buf); + err = xattr_readdir(dir->d_inode, listxattr_filler, &buf); mutex_unlock(&dir->d_inode->i_mutex); - if (!err) { - if (buf.r_pos > buf.r_size && buffer != NULL) - err = -ERANGE; - else - err = buf.r_pos; - } + if (!err) + err = buf.pos; dput(dir); out: return err; } -/* This is the implementation for the xattr plugin infrastructure */ -static LIST_HEAD(xattr_handlers); -static DEFINE_RWLOCK(handler_lock); - -static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char - *prefix) -{ - struct reiserfs_xattr_handler *xah = NULL; - struct list_head *p; - - read_lock(&handler_lock); - list_for_each(p, &xattr_handlers) { - xah = list_entry(p, struct reiserfs_xattr_handler, handlers); - if (strncmp(xah->prefix, prefix, strlen(xah->prefix)) == 0) - break; - xah = NULL; - } - - read_unlock(&handler_lock); - return xah; -} - -static void __unregister_handlers(void) -{ - struct reiserfs_xattr_handler *xah; - struct list_head *p, *tmp; - - list_for_each_safe(p, tmp, &xattr_handlers) { - xah = list_entry(p, struct reiserfs_xattr_handler, handlers); - if (xah->exit) - xah->exit(); - - list_del_init(p); - } - INIT_LIST_HEAD(&xattr_handlers); -} - -int __init reiserfs_xattr_register_handlers(void) -{ - int err = 0; - struct reiserfs_xattr_handler *xah; - struct list_head *p; - - write_lock(&handler_lock); - - /* If we're already initialized, nothing to do */ - if (!list_empty(&xattr_handlers)) { - write_unlock(&handler_lock); - return 0; - } - - /* Add the handlers */ - list_add_tail(&user_handler.handlers, &xattr_handlers); - list_add_tail(&trusted_handler.handlers, &xattr_handlers); -#ifdef CONFIG_REISERFS_FS_SECURITY - list_add_tail(&security_handler.handlers, &xattr_handlers); -#endif -#ifdef CONFIG_REISERFS_FS_POSIX_ACL - list_add_tail(&posix_acl_access_handler.handlers, &xattr_handlers); - list_add_tail(&posix_acl_default_handler.handlers, &xattr_handlers); -#endif - - /* Run initializers, if available */ - list_for_each(p, &xattr_handlers) { - xah = list_entry(p, struct reiserfs_xattr_handler, handlers); - if (xah->init) { - err = xah->init(); - if (err) { - list_del_init(p); - break; - } - } - } - - /* Clean up other handlers, if any failed */ - if (err) - __unregister_handlers(); - - write_unlock(&handler_lock); - return err; -} - -void reiserfs_xattr_unregister_handlers(void) -{ - write_lock(&handler_lock); - __unregister_handlers(); - write_unlock(&handler_lock); -} - static int reiserfs_check_acl(struct inode *inode, int mask) { struct posix_acl *acl; @@ -1157,20 +1074,16 @@ static int xattr_mount_check(struct super_block *s) { /* We need generation numbers to ensure that the oid mapping is correct * v3.5 filesystems don't have them. */ - if (!old_format_only(s)) { - set_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt)); - } else if (reiserfs_xattrs_optional(s)) { - /* Old format filesystem, but optional xattrs have been enabled - * at mount time. Error out. */ - reiserfs_warning(s, "jdm-20005", - "xattrs/ACLs not supported on pre v3.6 " - "format filesystem. Failing mount."); - return -EOPNOTSUPP; - } else { - /* Old format filesystem, but no optional xattrs have - * been enabled. This means we silently disable xattrs - * on the filesystem. */ - clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt)); + if (old_format_only(s)) { + if (reiserfs_xattrs_optional(s)) { + /* Old format filesystem, but optional xattrs have + * been enabled. Error out. */ + reiserfs_warning(s, "jdm-2005", + "xattrs/ACLs not supported " + "on pre-v3.6 format filesystems. " + "Failing mount."); + return -EOPNOTSUPP; + } } return 0; @@ -1251,9 +1164,11 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags) } #ifdef CONFIG_REISERFS_FS_XATTR + if (!err) + s->s_xattr = reiserfs_xattr_handlers; + error: if (err) { - clear_bit(REISERFS_XATTRS, &(REISERFS_SB(s)->s_mount_opt)); clear_bit(REISERFS_XATTRS_USER, &(REISERFS_SB(s)->s_mount_opt)); clear_bit(REISERFS_POSIXACL, &(REISERFS_SB(s)->s_mount_opt)); } diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index d3ce6ee..bfecf75 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -271,7 +271,7 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) char *name; void *value = NULL; struct posix_acl **p_acl; - size_t size; + size_t size = 0; int error; struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode); @@ -308,16 +308,21 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) value = posix_acl_to_disk(acl, &size); if (IS_ERR(value)) return (int)PTR_ERR(value); - error = reiserfs_xattr_set(inode, name, value, size, 0); - } else { - error = reiserfs_xattr_del(inode, name); - if (error == -ENODATA) { - /* This may seem odd here, but it means that the ACL was set - * with a value representable with mode bits. If there was - * an ACL before, reiserfs_xattr_del already dirtied the inode. - */ + } + + error = __reiserfs_xattr_set(inode, name, value, size, 0); + + /* + * Ensure that the inode gets dirtied if we're only using + * the mode bits and an old ACL didn't exist. We don't need + * to check if the inode is hashed here since we won't get + * called by reiserfs_inherit_default_acl(). + */ + if (error == -ENODATA) { + error = 0; + if (type == ACL_TYPE_ACCESS) { + inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); - error = 0; } } @@ -474,33 +479,22 @@ posix_acl_access_set(struct inode *inode, const char *name, return xattr_set_acl(inode, ACL_TYPE_ACCESS, value, size); } -static int posix_acl_access_del(struct inode *inode, const char *name) -{ - struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode); - if (strlen(name) != sizeof(POSIX_ACL_XATTR_ACCESS) - 1) - return -EINVAL; - iset_acl(inode, &reiserfs_i->i_acl_access, ERR_PTR(-ENODATA)); - return 0; -} - -static int -posix_acl_access_list(struct inode *inode, const char *name, int namelen, - char *out) +static size_t posix_acl_access_list(struct inode *inode, char *list, + size_t list_size, const char *name, + size_t name_len) { - int len = namelen; + const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS); if (!reiserfs_posixacl(inode->i_sb)) return 0; - if (out) - memcpy(out, name, len); - - return len; + if (list && size <= list_size) + memcpy(list, POSIX_ACL_XATTR_ACCESS, size); + return size; } -struct reiserfs_xattr_handler posix_acl_access_handler = { +struct xattr_handler reiserfs_posix_acl_access_handler = { .prefix = POSIX_ACL_XATTR_ACCESS, .get = posix_acl_access_get, .set = posix_acl_access_set, - .del = posix_acl_access_del, .list = posix_acl_access_list, }; @@ -522,32 +516,21 @@ posix_acl_default_set(struct inode *inode, const char *name, return xattr_set_acl(inode, ACL_TYPE_DEFAULT, value, size); } -static int posix_acl_default_del(struct inode *inode, const char *name) +static size_t posix_acl_default_list(struct inode *inode, char *list, + size_t list_size, const char *name, + size_t name_len) { - struct reiserfs_inode_info *reiserfs_i = REISERFS_I(inode); - if (strlen(name) != sizeof(POSIX_ACL_XATTR_DEFAULT) - 1) - return -EINVAL; - iset_acl(inode, &reiserfs_i->i_acl_default, ERR_PTR(-ENODATA)); - return 0; -} - -static int -posix_acl_default_list(struct inode *inode, const char *name, int namelen, - char *out) -{ - int len = namelen; + const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT); if (!reiserfs_posixacl(inode->i_sb)) return 0; - if (out) - memcpy(out, name, len); - - return len; + if (list && size <= list_size) + memcpy(list, POSIX_ACL_XATTR_DEFAULT, size); + return size; } -struct reiserfs_xattr_handler posix_acl_default_handler = { +struct xattr_handler reiserfs_posix_acl_default_handler = { .prefix = POSIX_ACL_XATTR_DEFAULT, .get = posix_acl_default_get, .set = posix_acl_default_set, - .del = posix_acl_default_del, .list = posix_acl_default_list, }; diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c index 1958b361..2aacf1f 100644 --- a/fs/reiserfs/xattr_security.c +++ b/fs/reiserfs/xattr_security.c @@ -31,35 +31,25 @@ security_set(struct inode *inode, const char *name, const void *buffer, return reiserfs_xattr_set(inode, name, buffer, size, flags); } -static int security_del(struct inode *inode, const char *name) +static size_t security_list(struct inode *inode, char *list, size_t list_len, + const char *name, size_t namelen) { - if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX)) - return -EINVAL; - - if (IS_PRIVATE(inode)) - return -EPERM; - - return 0; -} - -static int -security_list(struct inode *inode, const char *name, int namelen, char *out) -{ - int len = namelen; + const size_t len = namelen + 1; if (IS_PRIVATE(inode)) return 0; - if (out) - memcpy(out, name, len); + if (list && len <= list_len) { + memcpy(list, name, namelen); + list[namelen] = '\0'; + } return len; } -struct reiserfs_xattr_handler security_handler = { +struct xattr_handler reiserfs_xattr_security_handler = { .prefix = XATTR_SECURITY_PREFIX, .get = security_get, .set = security_set, - .del = security_del, .list = security_list, }; diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c index 076ad38..a865042 100644 --- a/fs/reiserfs/xattr_trusted.c +++ b/fs/reiserfs/xattr_trusted.c @@ -13,10 +13,7 @@ trusted_get(struct inode *inode, const char *name, void *buffer, size_t size) if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) return -EINVAL; - if (!reiserfs_xattrs(inode->i_sb)) - return -EOPNOTSUPP; - - if (!(capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))) + if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) return -EPERM; return reiserfs_xattr_get(inode, name, buffer, size); @@ -29,50 +26,30 @@ trusted_set(struct inode *inode, const char *name, const void *buffer, if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) return -EINVAL; - if (!reiserfs_xattrs(inode->i_sb)) - return -EOPNOTSUPP; - - if (!(capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))) + if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) return -EPERM; return reiserfs_xattr_set(inode, name, buffer, size, flags); } -static int trusted_del(struct inode *inode, const char *name) +static size_t trusted_list(struct inode *inode, char *list, size_t list_size, + const char *name, size_t name_len) { - if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX)) - return -EINVAL; + const size_t len = name_len + 1; - if (!reiserfs_xattrs(inode->i_sb)) - return -EOPNOTSUPP; - - if (!(capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))) - return -EPERM; - - return 0; -} - -static int -trusted_list(struct inode *inode, const char *name, int namelen, char *out) -{ - int len = namelen; - - if (!reiserfs_xattrs(inode->i_sb)) + if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode)) return 0; - if (!(capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))) - return 0; - - if (out) - memcpy(out, name, len); - + if (list && len <= list_size) { + memcpy(list, name, name_len); + list[name_len] = '\0'; + } return len; } -struct reiserfs_xattr_handler trusted_handler = { +struct xattr_handler reiserfs_xattr_trusted_handler = { .prefix = XATTR_TRUSTED_PREFIX, .get = trusted_get, .set = trusted_set, - .del = trusted_del, .list = trusted_list, }; diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c index 1384efc..e3238dc 100644 --- a/fs/reiserfs/xattr_user.c +++ b/fs/reiserfs/xattr_user.c @@ -6,10 +6,6 @@ #include <linux/reiserfs_xattr.h> #include <asm/uaccess.h> -#ifdef CONFIG_REISERFS_FS_POSIX_ACL -# include <linux/reiserfs_acl.h> -#endif - static int user_get(struct inode *inode, const char *name, void *buffer, size_t size) { @@ -25,7 +21,6 @@ static int user_set(struct inode *inode, const char *name, const void *buffer, size_t size, int flags) { - if (strlen(name) < sizeof(XATTR_USER_PREFIX)) return -EINVAL; @@ -34,33 +29,23 @@ user_set(struct inode *inode, const char *name, const void *buffer, return reiserfs_xattr_set(inode, name, buffer, size, flags); } -static int user_del(struct inode *inode, const char *name) +static size_t user_list(struct inode *inode, char *list, size_t list_size, + const char *name, size_t name_len) { - if (strlen(name) < sizeof(XATTR_USER_PREFIX)) - return -EINVAL; - - if (!reiserfs_xattrs_user(inode->i_sb)) - return -EOPNOTSUPP; - return 0; -} + const size_t len = name_len + 1; -static int -user_list(struct inode *inode, const char *name, int namelen, char *out) -{ - int len = namelen; if (!reiserfs_xattrs_user(inode->i_sb)) return 0; - - if (out) - memcpy(out, name, len); - + if (list && len <= list_size) { + memcpy(list, name, name_len); + list[name_len] = '\0'; + } return len; } -struct reiserfs_xattr_handler user_handler = { +struct xattr_handler reiserfs_xattr_user_handler = { .prefix = XATTR_USER_PREFIX, .get = user_get, .set = user_set, - .del = user_del, .list = user_list, }; diff --git a/include/linux/reiserfs_acl.h b/include/linux/reiserfs_acl.h index fe00f78..d180446 100644 --- a/include/linux/reiserfs_acl.h +++ b/include/linux/reiserfs_acl.h @@ -52,10 +52,8 @@ int reiserfs_acl_chmod(struct inode *inode); int reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry, struct inode *inode); int reiserfs_cache_default_acl(struct inode *dir); -extern int reiserfs_xattr_posix_acl_init(void) __init; -extern int reiserfs_xattr_posix_acl_exit(void); -extern struct reiserfs_xattr_handler posix_acl_default_handler; -extern struct reiserfs_xattr_handler posix_acl_access_handler; +extern struct xattr_handler reiserfs_posix_acl_default_handler; +extern struct xattr_handler reiserfs_posix_acl_access_handler; static inline void reiserfs_init_acl_access(struct inode *inode) { @@ -75,16 +73,6 @@ static inline struct posix_acl *reiserfs_get_acl(struct inode *inode, int type) return NULL; } -static inline int reiserfs_xattr_posix_acl_init(void) -{ - return 0; -} - -static inline int reiserfs_xattr_posix_acl_exit(void) -{ - return 0; -} - static inline int reiserfs_acl_chmod(struct inode *inode) { return 0; diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h index c8aee41..4686b90 100644 --- a/include/linux/reiserfs_fs_sb.h +++ b/include/linux/reiserfs_fs_sb.h @@ -451,7 +451,6 @@ enum reiserfs_mount_options { REISERFS_NO_UNHASHED_RELOCATION, REISERFS_HASHED_RELOCATION, REISERFS_ATTRS, - REISERFS_XATTRS, REISERFS_XATTRS_USER, REISERFS_POSIXACL, REISERFS_BARRIER_NONE, @@ -489,7 +488,7 @@ enum reiserfs_mount_options { #define reiserfs_data_log(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_LOG)) #define reiserfs_data_ordered(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_ORDERED)) #define reiserfs_data_writeback(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_DATA_WRITEBACK)) -#define reiserfs_xattrs(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS)) +#define reiserfs_xattrs(s) ((s)->s_xattr != NULL) #define reiserfs_xattrs_user(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_XATTRS_USER)) #define reiserfs_posixacl(s) (REISERFS_SB(s)->s_mount_opt & (1 << REISERFS_POSIXACL)) #define reiserfs_xattrs_optional(s) (reiserfs_xattrs_user(s) || reiserfs_posixacl(s)) diff --git a/include/linux/reiserfs_xattr.h b/include/linux/reiserfs_xattr.h index 3bd154f..958fcac 100644 --- a/include/linux/reiserfs_xattr.h +++ b/include/linux/reiserfs_xattr.h @@ -29,20 +29,6 @@ struct iattr; struct super_block; struct nameidata; -struct reiserfs_xattr_handler { - char *prefix; - int (*init) (void); - void (*exit) (void); - int (*get) (struct inode * inode, const char *name, void *buffer, - size_t size); - int (*set) (struct inode * inode, const char *name, const void *buffer, - size_t size, int flags); - int (*del) (struct inode * inode, const char *name); - int (*list) (struct inode * inode, const char *name, int namelen, - char *out); - struct list_head handlers; -}; - int reiserfs_xattr_register_handlers(void) __init; void reiserfs_xattr_unregister_handlers(void); int reiserfs_xattr_init(struct super_block *sb, int mount_flags); @@ -59,13 +45,14 @@ ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size); int reiserfs_removexattr(struct dentry *dentry, const char *name); int reiserfs_permission(struct inode *inode, int mask); -int reiserfs_xattr_del(struct inode *, const char *); -int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t); +int reiserfs_xattr_get(struct inode *, const char *, void *, size_t); +int __reiserfs_xattr_set(struct inode *, const char *, const void *, + size_t, int); int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int); -extern struct reiserfs_xattr_handler user_handler; -extern struct reiserfs_xattr_handler trusted_handler; -extern struct reiserfs_xattr_handler security_handler; +extern struct xattr_handler reiserfs_xattr_user_handler; +extern struct xattr_handler reiserfs_xattr_trusted_handler; +extern struct xattr_handler reiserfs_xattr_security_handler; static inline void reiserfs_init_xattr_rwsem(struct inode *inode) { |
