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>
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index ad02d47..3e275f1 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -375,6 +375,8 @@
} 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);
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index b8daa9f..e43934d 100644
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -31,13 +31,15 @@
#define FAN_MARK_ONLYDIR 0x00000008
#define FAN_MARK_MOUNT 0x00000010
#define FAN_MARK_IGNORED_MASK 0x00000020
+#define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
FAN_MARK_REMOVE |\
FAN_MARK_DONT_FOLLOW |\
FAN_MARK_ONLYDIR |\
FAN_MARK_MOUNT |\
- FAN_MARK_IGNORED_MASK)
+ FAN_MARK_IGNORED_MASK |\
+ FAN_MARK_IGNORED_SURV_MODIFY)
/*
* All of the events - we build the list by hand so that we can add flags in