X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Ffs%2Fnotify%2Fgroup.c;fp=kernel%2Ffs%2Fnotify%2Fgroup.c;h=18eb30c6bd8fcc6dddc130941fa43182295e6907;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=d16b62cb28544a147183c3780e3a61ffa246c8bb;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/fs/notify/group.c b/kernel/fs/notify/group.c
index d16b62cb2..18eb30c6b 100644
--- a/kernel/fs/notify/group.c
+++ b/kernel/fs/notify/group.c
@@ -39,6 +39,17 @@ static void fsnotify_final_destroy_group(struct fsnotify_group *group)
 	kfree(group);
 }
 
+/*
+ * Stop queueing new events for this group. Once this function returns
+ * fsnotify_add_event() will not add any new events to the group's queue.
+ */
+void fsnotify_group_stop_queueing(struct fsnotify_group *group)
+{
+	mutex_lock(&group->notification_mutex);
+	group->shutdown = true;
+	mutex_unlock(&group->notification_mutex);
+}
+
 /*
  * Trying to get rid of a group. Remove all marks, flush all events and release
  * the group reference.
@@ -47,6 +58,14 @@ static void fsnotify_final_destroy_group(struct fsnotify_group *group)
  */
 void fsnotify_destroy_group(struct fsnotify_group *group)
 {
+	/*
+	 * Stop queueing new events. The code below is careful enough to not
+	 * require this but fanotify needs to stop queuing events even before
+	 * fsnotify_destroy_group() is called and this makes the other callers
+	 * of fsnotify_destroy_group() to see the same behavior.
+	 */
+	fsnotify_group_stop_queueing(group);
+
 	/* clear all inode marks for this group */
 	fsnotify_clear_marks_by_group(group);