[take 2] Use pid in inotify events.

@@ -69,6 +69,9 @@ static atomic_t inotify_cookie;
  * inotify_add_watch() to the final put_inotify_watch().
  */
 
+#define IH_FLAGS_ADMIN		(0x00000001)
+/* handler owner has admin capabilities */
+
 /*
  * struct inotify_handle - represents an inotify instance
  *

@@ -80,6 +83,8 @@ struct inotify_handle {
 	struct list_head	watches;	/* list of watches */
 	atomic_t		count;		/* reference count */
 	u32			last_wd;	/* the last wd allocated */
+	uid_t			uid;		/* owner's uid */
+	u32			flags;		/* operation flags */
 	const struct inotify_operations *in_ops; /* inotify caller operations */
 };
 

@@ -292,6 +297,11 @@ void inotify_inode_queue_event(struct inode *inode, u32 mask, u32 cookie,
 			mutex_lock(&ih->mutex);
 			if (watch_mask & IN_ONESHOT)
 				remove_watch_no_event(watch, ih);
+
+			if (!cookie && ((ih->flags & IH_FLAGS_ADMIN) ||
+					(current->uid == ih->uid)))
+				cookie = task_tgid_vnr(current);
+
 			ih->in_ops->handle_event(watch, watch->wd, mask, cookie,
 						 name, n_inode);
 			mutex_unlock(&ih->mutex);

@@ -459,6 +469,10 @@ struct inotify_handle *inotify_init(const struct inotify_operations *ops)
 	mutex_init(&ih->mutex);
 	ih->last_wd = 0;
 	ih->in_ops = ops;
+	ih->uid = current->user->uid;
+	ih->flags = 0;
+	if (capable(CAP_SYS_ADMIN))
+		ih->flags |= IH_FLAGS_ADMIN;
 	atomic_set(&ih->count, 0);
 	get_inotify_handle(ih);