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authorLino Sanfilippo <LinoSanfilippo@gmx.de>2015-02-10 23:08:24 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-10 23:30:28 +0100
commitd2c1874ce687c175b544bc28b6187bf03735a931 (patch)
tree0380096d752790810a57cd74573c27e355cabb4a /fs/notify
parentfanotify: only destroy mark when both mask and ignored_mask are cleared (diff)
downloadlinux-d2c1874ce687c175b544bc28b6187bf03735a931.tar.xz
linux-d2c1874ce687c175b544bc28b6187bf03735a931.zip
fanotify: don't recalculate a marks mask if only the ignored mask changed
If removing bits from a mark's ignored mask, the concerning inodes/vfsmounts mask is not affected. So don't recalculate it. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Reviewed-by: Jan Kara <jack@suse.cz> Cc: Eric Paris <eparis@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify_user.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 25adb6d1b3db..f4d279807a96 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -487,15 +487,16 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
unsigned int flags,
int *destroy)
{
- __u32 oldmask;
+ __u32 oldmask = 0;
spin_lock(&fsn_mark->lock);
if (!(flags & FAN_MARK_IGNORED_MASK)) {
oldmask = fsn_mark->mask;
fsnotify_set_mark_mask_locked(fsn_mark, (oldmask & ~mask));
} else {
- oldmask = fsn_mark->ignored_mask;
- fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask & ~mask));
+ __u32 tmask = fsn_mark->ignored_mask & ~mask;
+
+ fsnotify_set_mark_ignored_mask_locked(fsn_mark, tmask);
}
*destroy = !(fsn_mark->mask | fsn_mark->ignored_mask);
spin_unlock(&fsn_mark->lock);