+ struct lttng_domain *domain, struct lttng_channel *attr,
+ int wpipe);
+int cmd_track_id(struct ltt_session *session,
+ enum lttng_tracker_type tracker_type,
+ enum lttng_domain_type domain,
+ struct lttng_tracker_id *id);
+int cmd_untrack_id(struct ltt_session *session,
+ enum lttng_tracker_type tracker_type,
+ enum lttng_domain_type domain,
+ struct lttng_tracker_id *id);