fsnotify: fix ignore mask logic in fsnotify()

amir73il · jankara · commit 9bdda4e9cf2d · 2018-09-03T14:57:41.000+02:00
Commit 92183a4 ("fsnotify: fix ignore mask logic in send_to_group()") acknoledges the use case of ignoring an event on an inode mark, because of an ignore mask on a mount mark of the same group (i.e. I want to get all events on this file, except for the events that came from that mount). This change depends on correctly merging the inode marks and mount marks group lists, so that the mount mark ignore mask would be tested in send_to_group(). Alas, the merging of the lists did not take into account the case where event in question is not in the mask of any of the mount marks. To fix this, completely remove the tests for inode and mount event masks from the lists merging code. Fixes: 92183a4 ("fsnotify: fix ignore mask logic in send_to_group") Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
@@ -351,16 +351,9 @@ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
 
 	iter_info.srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);
 
-	if ((mask & FS_MODIFY) ||
-	    (test_mask & to_tell->i_fsnotify_mask)) {
-		iter_info.marks[FSNOTIFY_OBJ_TYPE_INODE] =
-			fsnotify_first_mark(&to_tell->i_fsnotify_marks);
-	}
-
-	if (mnt && ((mask & FS_MODIFY) ||
-		    (test_mask & mnt->mnt_fsnotify_mask))) {
-		iter_info.marks[FSNOTIFY_OBJ_TYPE_INODE] =
-			fsnotify_first_mark(&to_tell->i_fsnotify_marks);
+	iter_info.marks[FSNOTIFY_OBJ_TYPE_INODE] =
+		fsnotify_first_mark(&to_tell->i_fsnotify_marks);
+	if (mnt) {
 		iter_info.marks[FSNOTIFY_OBJ_TYPE_VFSMOUNT] =
 			fsnotify_first_mark(&mnt->mnt_fsnotify_marks);
 	}
