+ }
+
+ /* Get all UST available events */
+ size = ust_app_list_events(&events);
+ if (size < 0) {
+ ret = LTTNG_ERR_UST_LIST_FAIL;
+ goto error;
+ }
+
+ for (i = 0; i < size; i++) {
+ ret = event_ust_disable_tracepoint(usess, uchan,
+ events[i].name);
+ if (ret < 0) {
+ /* Continue to disable the rest... */
+ error = LTTNG_ERR_UST_DISABLE_FAIL;
+ continue;
+ }
+ }
+
+ ret = error ? error : LTTNG_OK;
+error:
+ rcu_read_unlock();
+ free(events);
+ return ret;
+}
+
+/*
+ * Enable all agent event for a given UST session.
+ *
+ * Return LTTNG_OK on success or else a LTTNG_ERR* code.
+ */
+int event_agent_enable_all(struct ltt_ust_session *usess,
+ struct agent *agt, struct lttng_event *event,
+ struct lttng_filter_bytecode *filter ,char *filter_expression)
+{
+ int ret;
+ struct agent_event *aevent;
+ struct lttng_ht_iter iter;
+
+ assert(usess);
+
+ DBG("Event agent enabling ALL events for session %" PRIu64, usess->id);
+
+ /* Enable event on agent application through TCP socket. */
+ ret = event_agent_enable(usess, agt, event, filter, filter_expression);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+ /* Flag every event that they are now enabled. */
+ rcu_read_lock();
+ cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent,
+ node.node) {
+ aevent->enabled = 1;
+ }
+ rcu_read_unlock();
+
+ ret = LTTNG_OK;
+
+error:
+ return ret;
+}
+
+/*
+ * Check if this event's filter requires the activation of application contexts
+ * and enable them in the agent.
+ * TODO: bytecode iterator does not support non-legacy application
+ * contexts yet. Not an issue for now, since they are not generated by
+ * the lttng-ctl library.
+ */
+static int add_filter_app_ctx(struct lttng_filter_bytecode *bytecode,
+ const char *filter_expression, struct agent *agt)
+{
+ int ret = LTTNG_OK;
+ char *provider_name = NULL, *ctx_name = NULL;
+ struct bytecode_symbol_iterator *it =
+ bytecode_symbol_iterator_create(bytecode);
+
+ if (!it) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ do {
+ struct lttng_event_context ctx;
+ const char *symbol_name =
+ bytecode_symbol_iterator_get_name(it);
+
+ if (parse_application_context(symbol_name, &provider_name,
+ &ctx_name)) {
+ /* Not an application context. */
+ continue;
+ }
+
+ ctx.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT;
+ ctx.u.app_ctx.provider_name = provider_name;
+ ctx.u.app_ctx.ctx_name = ctx_name;
+
+ /* Recognized an application context. */
+ DBG("Enabling event with filter expression \"%s\" requires enabling the %s:%s application context.",
+ filter_expression, provider_name, ctx_name);
+
+ ret = agent_add_context(&ctx, agt);
+ if (ret != LTTNG_OK) {
+ ERR("Failed to add application context %s:%s.",
+ provider_name, ctx_name);
+ goto end;
+ }
+
+ ret = agent_enable_context(&ctx, agt->domain);
+ if (ret != LTTNG_OK) {
+ ERR("Failed to enable application context %s:%s.",
+ provider_name, ctx_name);
+ goto end;
+ }