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fsnotify: call fsnotify_parent in perm events

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fsnotify perm events do not call fsnotify parent.  That means you cannot
register a perm event on a directory and enforce permissions on all inodes in
that directory.  This patch fixes that situation.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
2010-10-28 17:21:56 -04:00
parent ff8bcbd03d
commit 52420392c8
3 changed files with 21 additions and 11 deletions
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9
include/linux/fsnotify.h
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@@ -26,12 +26,12 @@ static inline void fsnotify_d_instantiate(struct dentry *dentry,
}
/* Notify this dentry's parent about a child's events. */
static inline void fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
static inline int fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
{
if (!dentry)
dentry = path->dentry;
__fsnotify_parent(path, dentry, mask);
return __fsnotify_parent(path, dentry, mask);
}
/* simple call site for access decisions */
@@ -40,6 +40,7 @@ static inline int fsnotify_perm(struct file *file, int mask)
struct path *path = &file->f_path;
struct inode *inode = path->dentry->d_inode;
__u32 fsnotify_mask = 0;
int ret;
if (file->f_mode & FMODE_NONOTIFY)
return 0;
@@ -52,6 +53,10 @@ static inline int fsnotify_perm(struct file *file, int mask)
else
BUG();
ret = fsnotify_parent(path, NULL, fsnotify_mask);
if (ret)
return ret;
return fsnotify(inode, fsnotify_mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
}