X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-app.h;h=52a7cbfd35dbc060c5e3663bbd418fbb3b87854e;hb=6f6d3b6903fd9c577855211dc80f94199501a902;hp=c3e37e0712b69b49274c1d6b6b16df30785d7343;hpb=5c408ad8ef08a226c018702aca969536f36ac4e5;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/ust-app.h b/src/bin/lttng-sessiond/ust-app.h
index c3e37e071..52a7cbfd3 100644
--- a/src/bin/lttng-sessiond/ust-app.h
+++ b/src/bin/lttng-sessiond/ust-app.h
@@ -137,7 +137,11 @@ struct ust_app_channel {
 	int handle;
 	/* Channel and streams were sent to the UST tracer. */
 	int is_sent;
-	/* Unique key used to identify the channel on the consumer side. */
+	/*
+	 * Unique key used to identify the channel on the consumer side.
+	 * 0 is a reserved 'invalid' value used to indicate that the consumer
+	 * does not know about this channel (i.e. an error occured).
+	 */
 	uint64_t key;
 	/* Id of the tracing channel set on creation. */
 	uint64_t tracing_channel_id;
@@ -356,7 +360,7 @@ int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
 		struct consumer_output *consumer,
 		int overwrite, uint64_t *discarded, uint64_t *lost);
 int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess);
-int ust_app_rotate_session(struct ltt_session *session, bool *ust_active);
+enum lttng_error_code ust_app_rotate_session(struct ltt_session *session);
 
 static inline
 int ust_app_supported(void)
@@ -591,7 +595,7 @@ int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess)
 }
 
 static inline
-int ust_app_rotate_session(struct ltt_session *session, bool *ust_active)
+enum lttng_error_code ust_app_rotate_session(struct ltt_session *session)
 {
 	return 0;
 }