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Merge tag 'fsnotify_for_v5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

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Pull fsnotify fixes from Jan Kara:
 "Two fsnotify fixes"

* tag 'fsnotify_for_v5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fsnotify: fix unlink performance regression
  fsnotify: Clarify connector assignment in fsnotify_add_mark_list()
This commit is contained in:
Linus Torvalds
2019-05-13 15:08:16 -07:00
parent 29c079caf5 4d8e7055a4
commit d4c608115c
4 changed files with 50 additions and 33 deletions
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33
include/linux/fsnotify.h
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@@ -151,39 +151,6 @@ static inline void fsnotify_vfsmount_delete(struct vfsmount *mnt)
__fsnotify_vfsmount_delete(mnt);
}
/*
* fsnotify_nameremove - a filename was removed from a directory
*
* This is mostly called under parent vfs inode lock so name and
* dentry->d_parent should be stable. However there are some corner cases where
* inode lock is not held. So to be on the safe side and be reselient to future
* callers and out of tree users of d_delete(), we do not assume that d_parent
* and d_name are stable and we use dget_parent() and
* take_dentry_name_snapshot() to grab stable references.
*/
static inline void fsnotify_nameremove(struct dentry *dentry, int isdir)
{
struct dentry *parent;
struct name_snapshot name;
__u32 mask = FS_DELETE;
/* d_delete() of pseudo inode? (e.g. __ns_get_path() playing tricks) */
if (IS_ROOT(dentry))
return;
if (isdir)
mask |= FS_ISDIR;
parent = dget_parent(dentry);
take_dentry_name_snapshot(&name, dentry);
fsnotify(d_inode(parent), mask, d_inode(dentry), FSNOTIFY_EVENT_INODE,
&name.name, 0);
release_dentry_name_snapshot(&name);
dput(parent);
}
/*
* fsnotify_inoderemove - an inode is going away
*/