-int channel_ust_create(struct ltt_ust_session *usession,
- struct lttng_channel *chan);
-int channel_ust_copy(struct ltt_ust_channel *dst,
- struct ltt_ust_channel *src);
-int channel_ust_disable(struct ltt_ust_session *usession,
- struct ltt_ust_channel *uchan, int sock);
-int channel_ust_enable(struct ltt_ust_session *usession,
- struct ltt_ust_channel *uchan, int sock);
-