+ return tot_size;
+}
+
+int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
+ struct cds_list_head *buffer_reg_uid_list,
+ struct consumer_output *consumer, uint64_t uchan_id,
+ int overwrite, uint64_t *discarded, uint64_t *lost)
+{
+ int ret;
+ uint64_t consumer_chan_key;
+
+ ret = buffer_reg_uid_consumer_channel_key(
+ buffer_reg_uid_list, ust_session_id,
+ uchan_id, &consumer_chan_key);
+ if (ret < 0) {
+ goto end;
+ }
+
+ if (overwrite) {
+ ret = consumer_get_lost_packets(ust_session_id,
+ consumer_chan_key, consumer, lost);
+ *discarded = 0;
+ } else {
+ ret = consumer_get_discarded_events(ust_session_id,
+ consumer_chan_key, consumer, discarded);
+ *lost = 0;
+ }
+
+end:
+ return ret;
+}
+
+int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan,
+ struct consumer_output *consumer, int overwrite,
+ uint64_t *discarded, uint64_t *lost)
+{
+ int ret = 0;
+ struct lttng_ht_iter iter;
+ struct lttng_ht_node_str *ua_chan_node;
+ struct ust_app *app;
+ struct ust_app_session *ua_sess;
+ struct ust_app_channel *ua_chan;
+
+ rcu_read_lock();
+ /*
+ * Iterate over every registered applications, return when we
+ * found one in the right session and channel.
+ */
+ cds_lfht_for_each_entry(ust_app_ht->ht, &iter.iter, app, pid_n.node) {
+ struct lttng_ht_iter uiter;
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ continue;
+ }
+
+ /* Get channel */
+ lttng_ht_lookup(ua_sess->channels, (void *) uchan->name, &uiter);
+ ua_chan_node = lttng_ht_iter_get_node_str(&uiter);
+ /* If the session is 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);
+
+ if (overwrite) {
+ ret = consumer_get_lost_packets(usess->id, ua_chan->key,
+ consumer, lost);
+ *discarded = 0;
+ goto end;
+ } else {
+ ret = consumer_get_discarded_events(usess->id,
+ ua_chan->key, consumer, discarded);
+ *lost = 0;
+ goto end;
+ }
+ }
+
+end:
+ rcu_read_unlock();
+ return ret;
+}
+
+static
+int ust_app_regenerate_statedump(struct ltt_ust_session *usess,
+ struct ust_app *app)
+{
+ int ret = 0;
+ struct ust_app_session *ua_sess;
+
+ DBG("Regenerating the metadata for ust app pid %d", app->pid);
+
+ rcu_read_lock();
+
+ ua_sess = lookup_session_by_app(usess, app);
+ if (ua_sess == NULL) {
+ /* The session is in teardown process. Ignore and continue. */
+ goto end;
+ }
+
+ pthread_mutex_lock(&ua_sess->lock);
+
+ if (ua_sess->deleted) {
+ goto end_unlock;
+ }
+
+ pthread_mutex_lock(&app->sock_lock);
+ ret = ustctl_regenerate_statedump(app->sock, ua_sess->handle);
+ pthread_mutex_unlock(&app->sock_lock);
+
+end_unlock:
+ pthread_mutex_unlock(&ua_sess->lock);
+
+end: