MI: implement all objects related to trigger machine interface
[lttng-tools.git] / src / common / actions / action.c
index 64864a6273ae1fabac87cd8e6fd813831335f9d0..4dabfff303e547bc973c389e5d7baae38954a792 100644 (file)
@@ -7,14 +7,16 @@
 
 #include <assert.h>
 #include <common/error.h>
+#include <common/mi-lttng.h>
 #include <lttng/action/action-internal.h>
-#include <lttng/action/group-internal.h>
+#include <lttng/action/list-internal.h>
 #include <lttng/action/notify-internal.h>
 #include <lttng/action/rate-policy-internal.h>
 #include <lttng/action/rotate-session-internal.h>
 #include <lttng/action/snapshot-session-internal.h>
 #include <lttng/action/start-session-internal.h>
 #include <lttng/action/stop-session-internal.h>
+#include <lttng/error-query-internal.h>
 
 LTTNG_HIDDEN
 const char *lttng_action_type_string(enum lttng_action_type action_type)
@@ -22,8 +24,8 @@ const char *lttng_action_type_string(enum lttng_action_type action_type)
        switch (action_type) {
        case LTTNG_ACTION_TYPE_UNKNOWN:
                return "UNKNOWN";
-       case LTTNG_ACTION_TYPE_GROUP:
-               return "GROUP";
+       case LTTNG_ACTION_TYPE_LIST:
+               return "LIST";
        case LTTNG_ACTION_TYPE_NOTIFY:
                return "NOTIFY";
        case LTTNG_ACTION_TYPE_ROTATE_SESSION:
@@ -51,7 +53,9 @@ void lttng_action_init(struct lttng_action *action,
                action_serialize_cb serialize,
                action_equal_cb equal,
                action_destroy_cb destroy,
-               action_get_rate_policy_cb get_rate_policy)
+               action_get_rate_policy_cb get_rate_policy,
+               action_add_error_query_results_cb add_error_query_results,
+               action_mi_serialize_cb mi)
 {
        urcu_ref_init(&action->ref);
        action->type = type;
@@ -60,6 +64,8 @@ void lttng_action_init(struct lttng_action *action,
        action->equal = equal;
        action->destroy = destroy;
        action->get_rate_policy = get_rate_policy;
+       action->add_error_query_results = add_error_query_results;
+       action->mi_serialize = mi;
 
        action->execution_request_counter = 0;
        action->execution_counter = 0;
@@ -188,8 +194,8 @@ ssize_t lttng_action_create_from_payload(struct lttng_payload_view *view,
                create_from_payload_cb =
                                lttng_action_stop_session_create_from_payload;
                break;
-       case LTTNG_ACTION_TYPE_GROUP:
-               create_from_payload_cb = lttng_action_group_create_from_payload;
+       case LTTNG_ACTION_TYPE_LIST:
+               create_from_payload_cb = lttng_action_list_create_from_payload;
                break;
        default:
                ERR("Failed to create action from payload, unhandled action type: action-type=%u (%s)",
@@ -265,7 +271,7 @@ void lttng_action_increase_execution_count(struct lttng_action *action)
 LTTNG_HIDDEN
 void lttng_action_increase_execution_failure_count(struct lttng_action *action)
 {
-       action->execution_failure_counter++;
+       uatomic_inc(&action->execution_failure_counter);
 }
 
 LTTNG_HIDDEN
@@ -290,3 +296,137 @@ bool lttng_action_should_execute(const struct lttng_action *action)
 end:
        return execute;
 }
+
+LTTNG_HIDDEN
+enum lttng_action_status lttng_action_add_error_query_results(
+               const struct lttng_action *action,
+               struct lttng_error_query_results *results)
+{
+       return action->add_error_query_results(action, results);
+}
+
+LTTNG_HIDDEN
+enum lttng_action_status lttng_action_generic_add_error_query_results(
+               const struct lttng_action *action,
+               struct lttng_error_query_results *results)
+{
+       enum lttng_action_status action_status;
+       struct lttng_error_query_result *error_counter = NULL;
+       const uint64_t execution_failure_counter =
+                       uatomic_read(&action->execution_failure_counter);
+
+       error_counter = lttng_error_query_result_counter_create(
+                       "total execution failures",
+                       "Aggregated count of errors encountered when executing the action",
+                       execution_failure_counter);
+       if (!error_counter) {
+               action_status = LTTNG_ACTION_STATUS_ERROR;
+               goto end;
+       }
+
+       if (lttng_error_query_results_add_result(
+                           results, error_counter)) {
+               action_status = LTTNG_ACTION_STATUS_ERROR;
+               goto end;
+       }
+
+       /* Ownership transferred to the results. */
+       error_counter = NULL;
+       action_status = LTTNG_ACTION_STATUS_OK;
+end:
+       lttng_error_query_result_destroy(error_counter);
+       return action_status;
+}
+
+LTTNG_HIDDEN
+enum lttng_error_code lttng_action_mi_serialize(const struct lttng_trigger *trigger,
+               const struct lttng_action *action,
+               struct mi_writer *writer,
+               const struct mi_lttng_error_query_callbacks
+                               *error_query_callbacks,
+               struct lttng_dynamic_array *action_path_indexes)
+{
+       int ret;
+       enum lttng_error_code ret_code;
+       struct lttng_action_path *action_path = NULL;
+       struct lttng_error_query_results *error_query_results = NULL;
+
+       assert(action);
+       assert(writer);
+
+       /* Open action. */
+       ret = mi_lttng_writer_open_element(writer, mi_lttng_element_action);
+       if (ret) {
+               goto mi_error;
+       }
+
+       if (action->type == LTTNG_ACTION_TYPE_LIST) {
+               /*
+                * Recursion is safe since action lists can't be nested for
+                * the moment.
+                */
+               ret_code = lttng_action_list_mi_serialize(trigger, action, writer,
+                               error_query_callbacks, action_path_indexes);
+               if (ret_code != LTTNG_OK) {
+                       goto end;
+               }
+
+               /* Nothing else to do. */
+               goto close_action_element;
+       }
+
+       assert(action->mi_serialize);
+       ret_code = action->mi_serialize(action, writer);
+       if (ret_code != LTTNG_OK) {
+               goto end;
+       }
+
+       /* Error query for the action. */
+       if (error_query_callbacks && error_query_callbacks->action_cb) {
+               const uint64_t *action_path_indexes_raw_pointer = NULL;
+               const size_t action_path_indexes_size =
+                               lttng_dynamic_array_get_count(
+                                               action_path_indexes);
+
+               if (action_path_indexes_size != 0) {
+                       action_path_indexes_raw_pointer =
+                                       (const uint64_t *) action_path_indexes
+                                                       ->buffer.data;
+               }
+
+               action_path = lttng_action_path_create(
+                               action_path_indexes_raw_pointer,
+                               action_path_indexes_size);
+               assert(action_path);
+
+               ret_code = error_query_callbacks->action_cb(
+                               trigger, action_path, &error_query_results);
+               if (ret_code != LTTNG_OK) {
+                       goto end;
+               }
+
+               /* Serialize the error query results. */
+               ret_code = lttng_error_query_results_mi_serialize(
+                               error_query_results, writer);
+               if (ret_code != LTTNG_OK) {
+                       goto end;
+               }
+       }
+
+close_action_element:
+       /* Close action. */
+       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:
+       lttng_action_path_destroy(action_path);
+       lttng_error_query_results_destroy(error_query_results);
+       return ret_code;
+}
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