- kernel_wait_quiescent(kernel_tracer_fd);
- break;
- default:
- /* TODO: Userspace tracing */
- ret = LTTCOMM_NOT_IMPLEMENTED;
+ if (ret != LTTCOMM_OK) {
+ goto error;
+ }
+
+ kernel_wait_quiescent(kernel_tracer_fd);
+ break;
+ }
+ case LTTNG_DOMAIN_UST_PID:
+ {
+ int sock;
+ struct ltt_ust_channel *uchan;
+ struct ltt_ust_session *usess;
+ struct ust_app *app;
+
+ usess = trace_ust_get_session_by_pid(&session->ust_session_list,
+ domain->attr.pid);
+ if (usess == NULL) {
+ ret = LTTCOMM_UST_CHAN_NOT_FOUND;
+ goto error;
+ }
+
+ app = ust_app_get_by_pid(domain->attr.pid);
+ if (app == NULL) {
+ ret = LTTCOMM_APP_NOT_FOUND;
+ goto error;
+ }
+ sock = app->sock;
+
+ uchan = trace_ust_get_channel_by_name(attr->name, usess);
+ if (uchan == NULL) {
+ ret = channel_ust_create(usess, attr, sock);
+ } else {
+ ret = channel_ust_enable(usess, uchan, sock);
+ }
+
+ if (ret != LTTCOMM_OK) {
+ goto error;
+ }
+
+ ret = copy_ust_channel_to_app(usess, attr, app);
+ if (ret != LTTCOMM_OK) {