+}
+
+/*
+ * Init UST app hash table.
+ */
+void ust_app_ht_alloc(void)
+{
+ ust_app_ht = hashtable_new(0);
+ ust_app_sock_key_map = hashtable_new(0);
+}
+
+/*
+ * For a specific UST session, disable the channel for all registered apps.
+ */
+int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+
+ if (usess == NULL || uchan == NULL) {
+ ERR("Disabling UST global channel with NULL values");
+ ret = -1;
+ goto error;
+ }
+
+ DBG2("UST app disabling channel %s from global domain for session uid %d",
+ uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For every registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Get channel */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &iter);
+ /* If the session if found for the app, the channel must be there */
+ assert(ua_chan_node);
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+ /* The channel must not be already disabled */
+ assert(ua_chan->enabled == 1);
+
+ /* Disable channel onto application */
+ ret = disable_ust_app_channel(ua_sess, ua_chan, app);
+ if (ret < 0) {
+ /* XXX: We might want to report this error at some point... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+error:
+ return ret;
+}
+
+/*
+ * For a specific UST session, enable the channel for all registered apps.
+ */
+int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+
+ if (usess == NULL || uchan == NULL) {
+ ERR("Adding UST global channel to NULL values");
+ ret = -1;
+ goto error;
+ }
+
+ DBG2("UST app enabling channel %s to global domain for session uid %d",
+ uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For every registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Enable channel onto application */
+ ret = enable_ust_app_channel(ua_sess, uchan, app);
+ if (ret < 0) {
+ /* XXX: We might want to report this error at some point... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+error:
+ return ret;
+}
+
+/*
+ * Disable an event in a channel and for a specific session.
+ */
+int ust_app_disable_event_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter, uiter;
+ struct cds_lfht_node *ua_chan_node, *ua_event_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+
+ DBG("UST app disabling event %s for all apps in channel "
+ "%s for session uid %d", uevent->attr.name, uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For all registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ /* Next app */
+ continue;
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &uiter);
+ if (ua_chan_node == NULL) {
+ DBG2("Channel %s not found in session uid %d for app pid %d."
+ "Skipping", uchan->name, usess->uid, app->key.pid);
+ continue;
+ }
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ ua_event_node = hashtable_lookup(ua_chan->events,
+ (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter);
+ if (ua_event_node == NULL) {
+ DBG2("Event %s not found in channel %s for app pid %d."
+ "Skipping", uevent->attr.name, uchan->name, app->key.pid);
+ continue;
+ }
+ ua_event = caa_container_of(ua_event_node, struct ust_app_event, node);
+
+ ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app);
+ if (ret < 0) {
+ /* XXX: Report error someday... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/*
+ * For a specific UST session and UST channel, the event for all
+ * registered apps.
+ */
+int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter, uiter;
+ struct cds_lfht_node *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+
+ DBG("UST app disabling all event for all apps in channel "
+ "%s for session uid %d", uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For all registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ /* If ua_sess is NULL, there is a code flow error */
+ assert(ua_sess);
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name,
+ strlen(uchan->name), &uiter);
+ /* If the channel is not found, there is a code flow error */
+ assert(ua_chan_node);
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ /* Disable each events of channel */
+ cds_lfht_for_each_entry(ua_chan->events, &uiter, ua_event, node) {
+ ret = disable_ust_app_event(ua_sess, ua_chan, ua_event, app);
+ if (ret < 0) {
+ /* XXX: Report error someday... */
+ continue;
+ }
+ }
+ }
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/*
+ * For a specific UST session, create the channel for all registered apps.
+ */
+int ust_app_create_channel_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+
+ if (usess == NULL || uchan == NULL) {
+ ERR("Adding UST global channel to NULL values");
+ ret = -1;
+ goto error;
+ }
+
+ DBG2("UST app adding channel %s to global domain for session uid %d",
+ uchan->name, usess->uid);
+
+ rcu_read_lock();
+
+ /* For every registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ /*
+ * Create session on the tracer side and add it to app session HT. Note
+ * that if session exist, it will simply return a pointer to the ust
+ * app session.
+ */
+ ua_sess = create_ust_app_session(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Create channel onto application */
+ ua_chan = create_ust_app_channel(ua_sess, uchan, app);
+ if (ua_chan == NULL) {
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+error:
+ return ret;
+}
+
+/*
+ * Enable event for a specific session and channel on the tracer.
+ */
+int ust_app_enable_event_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter, uiter;
+ struct cds_lfht_node *ua_chan_node, *ua_event_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+
+ DBG("UST app enabling event %s for all apps for session uid %d",
+ uevent->attr.name, usess->uid);
+
+ /*
+ * NOTE: At this point, this function is called only if the session and
+ * channel passed are already created for all apps. and enabled on the
+ * tracer also.
+ */
+
+ rcu_read_lock();
+
+ /* For all registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ /* If ua_sess is NULL, there is a code flow error */
+ assert(ua_sess);
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name,
+ strlen(uchan->name), &uiter);
+ /* If the channel is not found, there is a code flow error */
+ assert(ua_chan_node);
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ ua_event_node = hashtable_lookup(ua_sess->channels,
+ (void*)uevent->attr.name, strlen(uevent->attr.name), &uiter);
+ if (ua_event_node == NULL) {
+ DBG3("UST app enable event %s not found. Skipping app",
+ uevent->attr.name);
+ continue;
+ }
+ ua_event = caa_container_of(ua_event_node, struct ust_app_event, node);
+
+ ret = enable_ust_app_event(ua_sess, ua_event, app);
+ if (ret < 0) {
+ /* XXX: Report error someday... */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/*
+ * For a specific existing UST session and UST channel, creates the event for
+ * all registered apps.
+ */
+int ust_app_create_event_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter, uiter;
+ struct cds_lfht_node *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+
+ DBG("UST app creating event %s for all apps for session uid %d",
+ uevent->attr.name, usess->uid);
+
+ /*
+ * NOTE: At this point, this function is called only if the session and
+ * channel passed are already created for all apps. and enabled on the
+ * tracer also.
+ */
+
+ rcu_read_lock();
+
+ /* For all registered applications */
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ /* If ua_sess is NULL, there is a code flow error */
+ assert(ua_sess);
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels, (void *)uchan->name,
+ strlen(uchan->name), &uiter);
+ /* If the channel is not found, there is a code flow error */
+ assert(ua_chan_node);
+
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel, node);
+
+ ret = create_ust_app_event(ua_sess, ua_chan, uevent, app);
+ if (ret < 0) {
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
+/*
+ * Start tracing for a specific UST session and app.
+ */
+int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ltt_ust_stream *ustream;
+ int consumerd_fd;
+
+ DBG("Starting tracing for ust app pid %d", app->key.pid);
+
+ rcu_read_lock();
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ goto error_rcu_unlock;
+ }
+
+ /* Upon restart, we skip the setup, already done */
+ if (ua_sess->started) {
+ goto skip_setup;
+ }
+
+ ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
+ if (ret < 0) {
+ goto error_rcu_unlock;
+ }
+
+ /* For each channel */
+ cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) {
+ /* Create all streams */
+ while (1) {
+ /* Create UST stream */
+ ustream = zmalloc(sizeof(*ustream));
+ if (ustream == NULL) {
+ PERROR("zmalloc ust stream");
+ goto error_rcu_unlock;
+ }
+
+ ret = ustctl_create_stream(app->key.sock, ua_chan->obj,
+ &ustream->obj);
+ if (ret < 0) {
+ /* Got all streams */
+ break;
+ }
+ ustream->handle = ustream->obj->handle;
+
+ /* Order is important */
+ cds_list_add_tail(&ustream->list, &ua_chan->streams.head);
+ ret = snprintf(ustream->pathname, PATH_MAX, "%s/%s_%u",
+ ua_sess->path, ua_chan->name,
+ ua_chan->streams.count++);
+ if (ret < 0) {
+ PERROR("asprintf UST create stream");
+ continue;
+ }
+ DBG2("UST stream %d ready at %s", ua_chan->streams.count,
+ ustream->pathname);
+ }
+ }
+
+ switch (app->bits_per_long) {
+ case 64:
+ consumerd_fd = ust_consumerd64_fd;
+ break;
+ case 32:
+ consumerd_fd = ust_consumerd32_fd;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_rcu_unlock;
+ }
+
+ /* Setup UST consumer socket and send fds to it */
+ ret = ust_consumer_send_session(consumerd_fd, ua_sess);
+ if (ret < 0) {
+ goto error_rcu_unlock;
+ }
+ ua_sess->started = 1;
+
+skip_setup:
+ /* This start the UST tracing */
+ ret = ustctl_start_session(app->key.sock, ua_sess->handle);
+ if (ret < 0) {
+ ERR("Error starting tracing for app pid: %d", app->key.pid);
+ goto error_rcu_unlock;
+ }
+
+ rcu_read_unlock();
+
+ /* Quiescent wait after starting trace */
+ ustctl_wait_quiescent(app->key.sock);
+
+ return 0;
+
+error_rcu_unlock:
+ rcu_read_unlock();
+ return -1;
+}
+
+/*
+ * Stop tracing for a specific UST session and app.
+ */
+int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app)
+{
+ int ret = 0;
+ struct ust_app_session *ua_sess;
+
+ DBG("Stopping tracing for ust app pid %d", app->key.pid);
+
+ rcu_read_lock();
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ /* Only malloc can failed so something is really wrong */
+ goto error_rcu_unlock;
+ }
+
+#if 0 /* only useful when periodical flush will be supported */
+ /* need to keep a handle on shm in session for this. */
+ /* Flush all buffers before stopping */
+ ret = ustctl_flush_buffer(usess->sock, usess->metadata->obj);
+ if (ret < 0) {
+ ERR("UST metadata flush failed");
+ }
+
+ cds_list_for_each_entry(ustchan, &usess->channels.head, list) {
+ ret = ustctl_flush_buffer(usess->sock, ustchan->obj);
+ if (ret < 0) {
+ ERR("UST flush buffer error");
+ }
+ }
+#endif
+
+ /* This inhibits UST tracing */
+ ret = ustctl_stop_session(app->key.sock, ua_sess->handle);
+ if (ret < 0) {
+ ERR("Error stopping tracing for app pid: %d", app->key.pid);
+ goto error_rcu_unlock;
+ }
+
+ rcu_read_unlock();
+
+ /* Quiescent wait after stopping trace */
+ ustctl_wait_quiescent(app->key.sock);
+
+ return 0;
+
+error_rcu_unlock:
+ rcu_read_unlock();
+ return -1;
+}
+
+/*
+ * Destroy a specific UST session in apps.
+ */
+int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app)
+{
+ struct ust_app_session *ua_sess;
+ struct lttng_ust_object_data obj;
+ struct cds_lfht_iter iter;
+ struct cds_lfht_node *node;
+ int ret;
+
+ DBG("Destroy tracing for ust app pid %d", app->key.pid);
+
+ rcu_read_lock();
+
+ __lookup_session_by_app(usess, app, &iter);
+ node = hashtable_iter_get_node(&iter);
+ if (node == NULL) {
+ /* Only malloc can failed so something is really wrong */
+ goto error_rcu_unlock;
+ }
+ ua_sess = caa_container_of(node, struct ust_app_session, node);
+ ret = hashtable_del(app->sessions, &iter);
+ assert(!ret);
+ delete_ust_app_session(app->key.sock, ua_sess);
+ obj.handle = ua_sess->handle;
+ obj.shm_fd = -1;
+ obj.wait_fd = -1;
+ obj.memory_map_size = 0;
+ ustctl_release_object(app->key.sock, &obj);
+
+ rcu_read_unlock();
+
+ /* Quiescent wait after stopping trace */
+ ustctl_wait_quiescent(app->key.sock);
+
+ return 0;
+
+error_rcu_unlock:
+ rcu_read_unlock();
+ return -1;
+}
+
+/*
+ * Start tracing for the UST session.
+ */
+int ust_app_start_trace_all(struct ltt_ust_session *usess)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+
+ DBG("Starting all UST traces");
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ret = ust_app_start_trace(usess, app);
+ if (ret < 0) {
+ /* Continue to next apps even on error */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return 0;
+}
+
+/*
+ * Start tracing for the UST session.
+ */
+int ust_app_stop_trace_all(struct ltt_ust_session *usess)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+
+ DBG("Stopping all UST traces");
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ret = ust_app_stop_trace(usess, app);
+ if (ret < 0) {
+ /* Continue to next apps even on error */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return 0;
+}
+
+/*
+ * Destroy app UST session.
+ */
+int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+
+ DBG("Destroy all UST traces");
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ret = ust_app_destroy_trace(usess, app);
+ if (ret < 0) {
+ /* Continue to next apps even on error */
+ continue;
+ }
+ }
+
+ rcu_read_unlock();
+
+ return 0;
+}
+
+/*
+ * Add channels/events from UST global domain to registered apps at sock.
+ */
+void ust_app_global_update(struct ltt_ust_session *usess, int sock)
+{
+ int ret = 0;
+ struct cds_lfht_iter iter;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+ struct ust_app_event *ua_event;
+
+ if (usess == NULL) {
+ ERR("No UST session on global update. Returning");
+ goto error;
+ }
+
+ DBG2("UST app global update for app sock %d for session uid %d", sock,
+ usess->uid);
+
+ rcu_read_lock();
+
+ app = find_app_by_sock(sock);
+ if (app == NULL) {
+ ERR("Failed to update app sock %d", sock);
+ goto error;
+ }
+
+ ua_sess = create_ust_app_session(usess, app);
+ if (ua_sess == NULL) {
+ goto error;
+ }
+
+ /*
+ * We can iterate safely here over all UST app session sicne the create ust
+ * app session above made a shadow copy of the UST global domain from the
+ * ltt ust session.
+ */
+ cds_lfht_for_each_entry(ua_sess->channels, &iter, ua_chan, node) {
+ ret = create_ust_channel(app, ua_sess, ua_chan);
+ if (ret < 0) {
+ /* FIXME: Should we quit here or continue... */
+ continue;
+ }
+
+ /* For each events */
+ cds_lfht_for_each_entry(ua_chan->events, &iter, ua_event, node) {
+ ret = create_ust_event(app, ua_sess, ua_chan, ua_event);
+ if (ret < 0) {
+ /* FIXME: Should we quit here or continue... */
+ continue;
+ }
+ }
+ }
+
+ if (usess->start_trace) {
+ ret = ust_app_start_trace(usess, app);
+ if (ret < 0) {
+ goto error;
+ }
+
+ DBG2("UST trace started for app pid %d", app->key.pid);
+ }
+
+error:
+ rcu_read_unlock();
+ return;
+}
+
+/*
+ * Add context to a specific channel for global UST domain.
+ */
+int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
+{
+ int ret = 0;
+ struct cds_lfht_node *ua_chan_node;
+ struct cds_lfht_iter iter, uiter;
+ struct ust_app_channel *ua_chan = NULL;
+ struct ust_app_session *ua_sess;
+ struct ust_app *app;
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &uiter);
+ if (ua_chan_node == NULL) {
+ continue;
+ }
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel,
+ node);
+
+ ret = create_ust_app_channel_context(ua_sess, ua_chan, &uctx->ctx, app);
+ if (ret < 0) {
+ continue;
+ }
+ }
+
+ /* Add ltt UST context node to ltt UST channel */
+ hashtable_add_unique(uchan->ctx, &uctx->node);
+
+ rcu_read_unlock();
+ return ret;
+}
+
+/*
+ * Add context to a specific event in a channel for global UST domain.
+ */
+int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
+ struct ltt_ust_context *uctx)
+{
+ int ret = 0;
+ struct cds_lfht_node *ua_chan_node, *ua_event_node;
+ struct cds_lfht_iter iter, uiter;
+ struct ust_app_session *ua_sess;
+ struct ust_app_event *ua_event;
+ struct ust_app_channel *ua_chan = NULL;
+ struct ust_app *app;
+
+ rcu_read_lock();
+
+ cds_lfht_for_each_entry(ust_app_ht, &iter, app, node) {
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Lookup channel in the ust app session */
+ ua_chan_node = hashtable_lookup(ua_sess->channels,
+ (void *)uchan->name, strlen(uchan->name), &uiter);
+ if (ua_chan_node == NULL) {
+ continue;
+ }
+ ua_chan = caa_container_of(ua_chan_node, struct ust_app_channel,
+ node);
+
+ ua_event_node = hashtable_lookup(ua_chan->events,
+ (void *)uevent->attr.name, strlen(uevent->attr.name), &uiter);
+ if (ua_event_node == NULL) {
+ continue;
+ }
+ ua_event = caa_container_of(ua_event_node, struct ust_app_event,
+ node);
+
+ ret = create_ust_app_event_context(ua_sess, ua_event, &uctx->ctx, app);
+ if (ret < 0) {
+ continue;
+ }
+ }
+
+ /* Add ltt UST context node to ltt UST event */
+ hashtable_add_unique(uevent->ctx, &uctx->node);
+
+ rcu_read_unlock();
+ return ret;