int ustctl_enable(int sock, struct object_data *object);
int ustctl_disable(int sock, struct object_data *object);
-int ustctl_start_session(int sock, struct object_data *object);
-int ustctl_stop_session(int sock, struct object_data *object);
+int ustctl_start_session(int sock, int handle);
+int ustctl_stop_session(int sock, int handle);
int ustctl_tracepoint_list(int sock); /* not implemented yet */
int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v);