unregister event when FD is closed

[deliverable/lttng-modules.git] / ltt-events.c

diff --git a/ltt-events.c b/ltt-events.c
index 1aadd9f37faffafef8776bf23abc5d4726238693..73ea08ea843eff4252277bc4a4d70dc8908e51f1 100644 (file)
--- a/ltt-events.c
+++ b/ltt-events.c
@@ -22,6 +22,8 @@ static LIST_HEAD(ltt_transport_list);
 static DEFINE_MUTEX(sessions_mutex);
 static struct kmem_cache *event_cache;
 
+static void _ltt_event_destroy(struct ltt_event *event);
+static int _ltt_event_unregister(struct ltt_event *event);
 static
 int _ltt_event_metadata_statedump(struct ltt_session *session,
                                  struct ltt_channel *chan,
@@ -277,9 +279,23 @@ int _ltt_event_unregister(struct ltt_event *event)
        return ret;
 }
 
+/*
+ * Used when an event FD is released.
+ */
+int ltt_event_unregister(struct ltt_event *event)
+{
+       int ret;
+
+       mutex_lock(&sessions_mutex);
+       ret = ltt_event_unregister(event);
+       mutex_unlock(&sessions_mutex);
+       return ret;
+}
+
 /*
  * Only used internally at session destruction.
  */
+static
 void _ltt_event_destroy(struct ltt_event *event)
 {
        ltt_event_put(event->desc);