+ if (!session_name) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+ lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP;
+
+ lttng_ctl_copy_string(lsm.session.name, session_name,
+ sizeof(lsm.session.name));
+
+ ret = lttng_ctl_ask_sessiond(&lsm, NULL);
+ if (ret < 0) {
+ goto end;
+ }
+
+ ret = 0;
+end:
+ return ret;
+}
+
+int lttng_register_trigger(struct lttng_trigger *trigger)
+{
+ int ret;
+ struct lttcomm_session_msg lsm;
+ struct lttng_dynamic_buffer buffer;
+
+ lttng_dynamic_buffer_init(&buffer);
+ if (!trigger) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (!lttng_trigger_validate(trigger)) {
+ ret = -LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+
+ ret = lttng_trigger_serialize(trigger, &buffer);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+ lsm.cmd_type = LTTNG_REGISTER_TRIGGER;
+ lsm.u.trigger.length = (uint32_t) buffer.size;
+ ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data,
+ buffer.size, NULL);
+end:
+ lttng_dynamic_buffer_reset(&buffer);
+ return ret;
+}
+
+int lttng_unregister_trigger(struct lttng_trigger *trigger)
+{
+ int ret;
+ struct lttcomm_session_msg lsm;
+ struct lttng_dynamic_buffer buffer;
+
+ lttng_dynamic_buffer_init(&buffer);
+ if (!trigger) {
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ if (!lttng_trigger_validate(trigger)) {
+ ret = -LTTNG_ERR_INVALID_TRIGGER;
+ goto end;
+ }
+
+ ret = lttng_trigger_serialize(trigger, &buffer);
+ if (ret < 0) {
+ ret = -LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ memset(&lsm, 0, sizeof(lsm));
+ lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER;
+ lsm.u.trigger.length = (uint32_t) buffer.size;
+ ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buffer.data,
+ buffer.size, NULL);
+end:
+ lttng_dynamic_buffer_reset(&buffer);
+ return ret;
+}
+
+static int lttng_track_untrack_id(struct lttng_handle *handle,
+ enum lttng_tracker_type tracker_type,
+ const struct lttng_tracker_id *id,
+ enum lttcomm_sessiond_command cmd)
+{
+ int ret;
+ struct lttcomm_session_msg lsm;
+ const char *var_data = NULL;
+ size_t var_data_len = 0;
+ int value;
+ enum lttng_tracker_id_status status;
+
+ /* NULL arguments are forbidden. No default values. */