diff options
| author |   Jan Kara <jack@suse.cz> | 2014-11-13 15:19:33 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-11-13 16:17:06 -0800 |
| commit | 8edc6e1688fc8f02c8c1f53a2ec4928cb1055f4d (patch) | |
| tree | 0119e3e83852347bc59942962d86e36116e88c13 /fs/notify/fsnotify.h | |
| parent | mm, compaction: prevent infinite loop in compact_zone (diff) | |
| download | linux-dev-8edc6e1688fc8f02c8c1f53a2ec4928cb1055f4d.tar.xz linux-dev-8edc6e1688fc8f02c8c1f53a2ec4928cb1055f4d.zip | |
fanotify: fix notification of groups with inode & mount marks
fsnotify() needs to merge inode and mount marks lists when notifying
groups about events so that ignore masks from inode marks are reflected
in mount mark notifications and groups are notified in proper order
(according to priorities).
Currently the sorting of the lists done by fsnotify_add_inode_mark() /
fsnotify_add_vfsmount_mark() and fsnotify() differed which resulted
ignore masks not being used in some cases.
Fix the problem by always using the same comparison function when
sorting / merging the mark lists.
Thanks to Heinrich Schuchardt for improvements of my patch.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=87721
Signed-off-by: Jan Kara <jack@suse.cz>
Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/notify/fsnotify.h')
| -rw-r--r-- | fs/notify/fsnotify.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/notify/fsnotify.h b/fs/notify/fsnotify.h index 9c0898c4cfe1..3b68b0ae0a97 100644 --- a/fs/notify/fsnotify.h +++ b/fs/notify/fsnotify.h @@ -12,6 +12,10 @@ extern void fsnotify_flush_notify(struct fsnotify_group *group); /* protects reads of inode and vfsmount marks list */ extern struct srcu_struct fsnotify_mark_srcu; +/* compare two groups for sorting of marks lists */ +extern int fsnotify_compare_groups(struct fsnotify_group *a, + struct fsnotify_group *b); + extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark, __u32 mask); /* add a mark to an inode */ |