+ if (ua_chan->attr.type == LTTNG_UST_CHAN_METADATA) {
+ chan_id = -1U;
+ } else {
+ chan_reg = ust_registry_channel_find(registry, chan_reg_key);
+ assert(chan_reg);
+ chan_id = chan_reg->chan_id;
+ }
+
+ consumer_init_ask_channel_comm_msg(&msg,
+ ua_chan->attr.subbuf_size,
+ ua_chan->attr.num_subbuf,
+ ua_chan->attr.overwrite,
+ ua_chan->attr.switch_timer_interval,
+ ua_chan->attr.read_timer_interval,
+ (int) ua_chan->attr.output,
+ (int) ua_chan->attr.type,
+ ua_sess->tracing_id,
+ pathname,
+ ua_chan->name,
+ ua_sess->euid,
+ ua_sess->egid,
+ consumer->net_seq_index,
+ ua_chan->key,
+ registry->uuid,
+ chan_id);
+
+ health_code_update();
+
+ ret = lttcomm_send_unix_sock(socket->fd, &msg, sizeof(msg));
+ if (ret < 0) {
+ goto error;
+ }
+
+ ret = consumer_recv_status_channel(socket, &key,
+ &ua_chan->expected_stream_count);
+ if (ret < 0) {
+ goto error;
+ }
+ /* Communication protocol error. */
+ assert(key == ua_chan->key);
+ /* We need at least one where 1 stream for 1 cpu. */
+ assert(ua_chan->expected_stream_count > 0);
+
+ DBG2("UST ask channel %" PRIu64 " successfully done with %u stream(s)", key,
+ ua_chan->expected_stream_count);