fanotify: allow ignored_masks to survive modify

Some users may want to truely ignore an inode even if it has been modified.
Say you are wanting a mount which contains a log file and you really don't
want any notification about that file.  This patch allows the listener to
do that.

Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index ad02d475770f..3e275f17e7b7 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -375,6 +375,8 @@ static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
         } else {
                 oldmask = fsn_mark->ignored_mask;
                 fsnotify_set_mark_ignored_mask_locked(fsn_mark, (oldmask | mask));
+                if (flags & FAN_MARK_IGNORED_SURV_MODIFY)
+                        fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY;
         }
         spin_unlock(&fsn_mark->lock);