int ust_consumer_ask_channel(struct ust_app_session *ua_sess,
struct ust_app_channel *ua_chan,
struct consumer_output *consumer,
struct consumer_socket *socket,
struct ust_registry_session *registry,
int ust_consumer_ask_channel(struct ust_app_session *ua_sess,
struct ust_app_channel *ua_chan,
struct consumer_output *consumer,
struct consumer_socket *socket,
struct ust_registry_session *registry,