+static enum lttng_error_code lttng_action_start_session_mi_serialize(
+ const struct lttng_action *action, struct mi_writer *writer)
+{
+ int ret;
+ enum lttng_error_code ret_code;
+ enum lttng_action_status status;
+ const char *session_name = NULL;
+ const struct lttng_rate_policy *policy = NULL;
+
+ LTTNG_ASSERT(action);
+ LTTNG_ASSERT(IS_START_SESSION_ACTION(action));
+
+ status = lttng_action_start_session_get_session_name(
+ action, &session_name);
+ LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
+ LTTNG_ASSERT(session_name != NULL);
+
+ status = lttng_action_start_session_get_rate_policy(action, &policy);
+ LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
+ LTTNG_ASSERT(policy != NULL);
+
+ /* Open action start session element. */
+ ret = mi_lttng_writer_open_element(
+ writer, mi_lttng_element_action_start_session);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Session name. */
+ ret = mi_lttng_writer_write_element_string(
+ writer, mi_lttng_element_session_name, session_name);
+ if (ret) {
+ goto mi_error;
+ }
+
+ /* Rate policy. */
+ ret_code = lttng_rate_policy_mi_serialize(policy, writer);
+ if (ret_code != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Close action start session element. */
+ ret = mi_lttng_writer_close_element(writer);
+ if (ret) {
+ goto mi_error;
+ }
+
+ ret_code = LTTNG_OK;
+ goto end;
+
+mi_error:
+ ret_code = LTTNG_ERR_MI_IO_FAIL;
+end:
+ return ret_code;
+}
+