diff options
Diffstat (limited to 'fs/9p/vfs_inode.c')
| -rw-r--r-- | fs/9p/vfs_inode.c | 253 |
1 files changed, 184 insertions, 69 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index ef5905f..34bf71b 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> @@ -44,6 +45,7 @@ #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; @@ -53,6 +55,10 @@ 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; +static int +v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int omode, + dev_t rdev); + /** * unixmode2p9mode - convert unix mode bits to plan 9 * @v9ses: v9fs session information @@ -500,6 +506,11 @@ v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid, 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: @@ -553,13 +564,6 @@ 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 @@ -655,29 +659,37 @@ error: */ static int -v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, +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 - flags = O_RDWR; + 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, mode); + "mode:0x%x\n", name, flags, omode); dfid = v9fs_fid_lookup(dentry->d_parent); if (IS_ERR(dfid)) { @@ -695,6 +707,15 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, } 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, @@ -702,46 +723,52 @@ v9fs_vfs_create_dotl(struct inode *dir, struct dentry *dentry, int mode, err); goto error; } + /* instantiate inode and assign the unopened fid to the dentry */ + if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE || + (nd && nd->flags & LOOKUP_OPEN)) { + 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; + } - /* 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) + 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; - else + d_instantiate(dentry, inode); + err = v9fs_fid_add(dentry, fid); + if (err < 0) + goto error; + /* The fid would get clunked via a dput */ + 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; + } dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); - err = v9fs_fid_add(dentry, fid); - if (err < 0) - goto error; + d_instantiate(dentry, inode); + } + /* Now set the ACL based on the default value */ + v9fs_set_create_acl(dentry, dacl, pacl); /* 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)) { p9_client_clunk(ofid); return PTR_ERR(filp); @@ -800,7 +827,7 @@ 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; @@ -859,23 +886,28 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) * */ -static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, - int mode) +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); - mode |= S_IFDIR; + 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)) { @@ -886,11 +918,14 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, } gid = v9fs_get_fsgid_for_create(dir); - if (gid < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); + 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) @@ -920,7 +955,23 @@ static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry, 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; + } + dentry->d_op = &v9fs_dentry_operations; + 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); @@ -979,7 +1030,7 @@ 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) @@ -990,6 +1041,8 @@ inst_out: d_add(dentry, inode); return NULL; +error_iput: + iput(inode); error: p9_client_clunk(fid); @@ -1237,7 +1290,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) * */ -static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) +int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) { int retval; struct v9fs_session_info *v9ses; @@ -1279,6 +1332,12 @@ static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) 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; } @@ -1473,7 +1532,7 @@ 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); @@ -1616,11 +1675,6 @@ v9fs_vfs_symlink_dotl(struct inode *dir, struct dentry *dentry, 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); @@ -1855,21 +1909,23 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) * */ static int -v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, +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, mode, MAJOR(rdev), MINOR(rdev)); + dentry->d_name.name, omode, MAJOR(rdev), MINOR(rdev)); if (!new_valid_dev(rdev)) return -EINVAL; @@ -1885,11 +1941,14 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, } gid = v9fs_get_fsgid_for_create(dir); - if (gid < 0) { - P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n"); + 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); @@ -1933,13 +1992,68 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, dentry->d_op = &v9fs_dentry_operations; 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_readlink_dotl(struct dentry *dentry, char *buffer, int buflen) +{ + int retval; + struct p9_fid *fid; + char *target = NULL; + + P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); + retval = -EPERM; + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + retval = p9_client_readlink(fid, &target); + if (retval < 0) + return retval; + + strncpy(buffer, target, buflen); + P9_DPRINTK(P9_DEBUG_VFS, "%s -> %s\n", dentry->d_name.name, buffer); + + retval = strnlen(buffer, buflen); + return retval; +} + +/** + * 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 len = 0; + char *link = __getname(); + + P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); + + if (!link) + link = ERR_PTR(-ENOMEM); + else { + len = v9fs_vfs_readlink_dotl(dentry, link, PATH_MAX); + if (len < 0) { + __putname(link); + link = ERR_PTR(len); + } else + link[min(len, PATH_MAX-1)] = 0; + } + nd_set_link(nd, link); + + return NULL; +} + static const struct inode_operations v9fs_dir_inode_operations_dotu = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, @@ -1970,7 +2084,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = { .getxattr = generic_getxattr, .removexattr = generic_removexattr, .listxattr = v9fs_listxattr, - + .check_acl = v9fs_check_acl, }; static const struct inode_operations v9fs_dir_inode_operations = { @@ -1997,6 +2111,7 @@ static const struct inode_operations v9fs_file_inode_operations_dotl = { .getxattr = generic_getxattr, .removexattr = generic_removexattr, .listxattr = v9fs_listxattr, + .check_acl = v9fs_check_acl, }; static const struct inode_operations v9fs_symlink_inode_operations = { @@ -2008,8 +2123,8 @@ static const struct inode_operations v9fs_symlink_inode_operations = { }; static const struct inode_operations v9fs_symlink_inode_operations_dotl = { - .readlink = generic_readlink, - .follow_link = v9fs_vfs_follow_link, + .readlink = v9fs_vfs_readlink_dotl, + .follow_link = v9fs_vfs_follow_link_dotl, .put_link = v9fs_vfs_put_link, .getattr = v9fs_vfs_getattr_dotl, .setattr = v9fs_vfs_setattr_dotl, |
