fsnotify: cleanup should_send_event

The change to use srcu and walk the object list rather than the global
fsnotify_group list means that should_send_event is no longer needed for a
number of groups and can be simplified for others.  Do that.
Signed-off-by: NEric Paris <eparis@redhat.com>

fs/notify/dnotify/dnotify.c

@@ -129,20 +129,11 @@ static bool dnotify_should_send_event(struct fsnotify_group *group,
 				      struct fsnotify_mark *mark, __u32 mask,
 				      void *data, int data_type)
 {
-	bool send;
-
-	/* !dir_notify_enable should never get here, don't waste time checking
-	if (!dir_notify_enable)
-		return 0; */
-
 	/* not a dir, dnotify doesn't care */
 	if (!S_ISDIR(inode->i_mode))
 		return false;
 
-	mask = (mask & ~FS_EVENT_ON_CHILD);
-	send = (mask & mark->mask);
-
-	return send;
+	return true;
 }
 
 static void dnotify_free_mark(struct fsnotify_mark *fsn_mark)

fs/notify/fanotify/fanotify.c

@@ -185,22 +185,15 @@ static bool should_send_inode_event(struct fsnotify_group *group,
 	pr_debug("%s: group=%p inode=%p mark=%p mask=%x\n",
 		 __func__, group, inode, mark, mask);
 
-	/* if the event is for a child and this inode doesn't care about
-	 * events on the child, don't send it! */
-	if ((mask & FS_EVENT_ON_CHILD) &&
-	    !(mark->mask & FS_EVENT_ON_CHILD)) {
-		mask = 0;
-	} else {
 	/*
-		 * We care about children, but do we care about this particular
-		 * type of event?
+	 * if the event is for a child and this inode doesn't care about
+	 * events on the child, don't send it!
 	 */
-		mask &= ~FS_EVENT_ON_CHILD;
-		mask &= mark->mask;
-		mask &= ~mark->ignored_mask;
-	}
-
-	return mask;
+	if ((mask & FS_EVENT_ON_CHILD) &&
+	    !(mark->mask & FS_EVENT_ON_CHILD))
+		return false;
+	else
+		return true;
 }
 
 static bool fanotify_should_send_event(struct fsnotify_group *group, struct inode *to_tell,

fs/notify/fsnotify.c

@@ -180,8 +180,8 @@ static int send_to_group(struct fsnotify_group *group, struct inode *to_tell,
 		 " data_is=%d cookie=%d event=%p\n", __func__, group, to_tell,
 		 mnt, mark, mask, data, data_is, cookie, *event);
 
-	if (!group->ops->should_send_event(group, to_tell, mnt, mark, mask,
-					   data, data_is))
+	if (group->ops->should_send_event(group, to_tell, mnt, mark, mask,
+					  data, data_is) == false)
 		return 0;
 	if (!*event) {
 		*event = fsnotify_create_event(to_tell, mask, data,

fs/notify/inotify/inotify_fsnotify.c

@@ -142,23 +142,15 @@ static bool inotify_should_send_event(struct fsnotify_group *group, struct inode
 				      struct vfsmount *mnt, struct fsnotify_mark *mark,
 				      __u32 mask, void *data, int data_type)
 {
-	bool send;
-
-	pr_debug("%s: group=%p inode=%p mask=%x data=%p data_type=%d\n",
-		 __func__, group, inode, mask, data, data_type);
-
-	mask = (mask & ~FS_EVENT_ON_CHILD);
-	send = (mark->mask & mask);
-
-	if (send && (mark->mask & FS_EXCL_UNLINK) &&
+	if ((mark->mask & FS_EXCL_UNLINK) &&
 	    (data_type == FSNOTIFY_EVENT_FILE)) {
 		struct file *file  = data;
 
 		if (d_unlinked(file->f_path.dentry))
-			send = false;
+			return false;
 	}
 
-	return send;
+	return true;
 }
 
 /*

kernel/audit_tree.c

@@ -923,7 +923,7 @@ static bool audit_tree_send_event(struct fsnotify_group *group, struct inode *in
 				  struct vfsmount *mnt, struct fsnotify_mark *mark,
 				  __u32 mask, void *data, int data_type)
 {
-	return 0;
+	return false;
 }
 
 static const struct fsnotify_ops audit_tree_ops = {

kernel/audit_watch.c

@@ -514,12 +514,7 @@ static bool audit_watch_should_send_event(struct fsnotify_group *group, struct i
 					  struct vfsmount *mnt, struct fsnotify_mark *mark,
 					  __u32 mask, void *data, int data_type)
 {
-	bool send;
-
-	mask = (mask & ~FS_EVENT_ON_CHILD);
-	send = (mark->mask & mask);
-
-	return send;
+       return true;
 }
 
 /* Update watch data in audit rules based on fsnotify events. */