+ ust_event_name = event_get_default_agent_ust_name(agt->domain);
+ if (!ust_event_name) {
+ ret = LTTNG_ERR_FATAL;
+ goto error;
+ }
+
+ /*
+ * The loglevel is hardcoded with 0 here since the agent ust event is set
+ * with the loglevel type to ALL thus the loglevel stays 0. The event's
+ * filter is the one handling the loglevel for agent.
+ */
+ uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name,
+ aevent->filter, 0, NULL);
+ /* If the agent event exists, it must be available on the UST side. */
+ assert(uevent);
+
+ ret = ust_app_disable_event_glb(usess, uchan, uevent);
+ if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) {
+ ret = LTTNG_ERR_UST_DISABLE_FAIL;
+ goto error;
+ }
+
+ /*
+ * Flag event that it's disabled so the shadow copy on the ust app side
+ * will disable it if an application shows up.
+ */
+ uevent->enabled = 0;
+
+ ret = agent_disable_event(aevent, agt->domain);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+end:
+ return LTTNG_OK;
+
+error:
+ return ret;
+}
+/*
+ * Disable all agent event for a given UST session.
+ *
+ * Return LTTNG_OK on success or else a LTTNG_ERR* code.
+ */
+int event_agent_disable_all(struct ltt_ust_session *usess,
+ struct agent *agt)
+{
+ int ret;
+ struct agent_event *aevent;
+ struct lttng_ht_iter iter;
+
+ assert(agt);
+ assert(usess);
+
+ /*
+ * Disable event on agent application. Continue to disable all other events
+ * if the * event is not found.
+ */
+ ret = event_agent_disable(usess, agt, "*");
+ if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) {
+ goto error;
+ }
+
+ /* Flag every event that they are now enabled. */
+ rcu_read_lock();
+ cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent,
+ node.node) {
+ if (!aevent->enabled) {
+ continue;
+ }
+
+ ret = event_agent_disable(usess, agt, aevent->name);
+ if (ret != LTTNG_OK) {
+ rcu_read_unlock();
+ goto error;
+ }
+ }
+ rcu_read_unlock();
+
+ ret = LTTNG_OK;