MI: implement all objects related to trigger machine interface

[lttng-tools.git] / src / common / actions / list.c

diff --git a/src/common/actions/list.c b/src/common/actions/list.c
index 9b2d129b68a1e428ac4fb81f348f750d8e78fdee..3713cbd76da49f69c319f86a46def560f284616c 100644 (file)
--- a/src/common/actions/list.c
+++ b/src/common/actions/list.c
@@ -7,10 +7,11 @@
 
 #include <assert.h>
 #include <common/dynamic-array.h>
-#include <common/payload.h>
-#include <common/payload-view.h>
 #include <common/error.h>
 #include <common/macros.h>
+#include <common/mi-lttng.h>
+#include <common/payload-view.h>
+#include <common/payload.h>
 #include <lttng/action/action-internal.h>
 #include <lttng/action/list-internal.h>
 #include <lttng/action/list.h>
@@ -278,6 +279,86 @@ end:
        return action_status;
 }
 
+LTTNG_HIDDEN
+enum lttng_error_code lttng_action_list_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;
+       struct lttng_action_list *action_list;
+       unsigned int i, count;
+       enum lttng_error_code ret_code;
+
+       assert(action);
+       assert(IS_LIST_ACTION(action));
+       assert(writer);
+
+       /* Open action list. */
+       ret = mi_lttng_writer_open_element(
+                       writer, mi_lttng_element_action_list);
+       if (ret) {
+               goto mi_error;
+       }
+
+       /* Serialize every action of the list. */
+       action_list = action_list_from_action(action);
+       count = lttng_dynamic_pointer_array_get_count(&action_list->actions);
+       for (i = 0; i < count; i++) {
+               const struct lttng_action *child =
+                               lttng_action_list_get_at_index(action, i);
+               const uint64_t index = (uint64_t) i;
+
+               assert(child);
+
+               /*
+                * Add the index to the action path.
+                *
+                * This index is replaced on every iteration to walk the action
+                * tree in-order and to re-use the dynamic array instead of
+                * copying it at every level.
+                */
+               ret = lttng_dynamic_array_add_element(
+                               action_path_indexes, &index);
+               if (ret) {
+                       ret_code = LTTNG_ERR_NOMEM;
+                       goto end;
+               }
+
+               ret_code = lttng_action_mi_serialize(trigger, child, writer,
+                               error_query_callbacks, action_path_indexes);
+               if (ret_code != LTTNG_OK) {
+                       goto end;
+               }
+
+               ret = lttng_dynamic_array_remove_element(action_path_indexes,
+                               lttng_dynamic_array_get_count(
+                                               action_path_indexes) -
+                                               1);
+               if (ret) {
+                       ret_code = LTTNG_ERR_UNK;
+                       goto end;
+               }
+       }
+
+       /* Close action_list 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;
+}
+
 struct lttng_action *lttng_action_list_create(void)
 {
        struct lttng_action_list *action_list;
@@ -291,12 +372,14 @@ struct lttng_action *lttng_action_list_create(void)
 
        action = &action_list->parent;
 
+       /*
+        * The mi for the list is handled at the lttng_action_mi level to ease
+        * action path management for error query.
+        */
        lttng_action_init(action, LTTNG_ACTION_TYPE_LIST,
-                       lttng_action_list_validate,
-                       lttng_action_list_serialize,
+                       lttng_action_list_validate, lttng_action_list_serialize,
                        lttng_action_list_is_equal, lttng_action_list_destroy,
-                       NULL,
-                       lttng_action_list_add_error_query_results);
+                       NULL, lttng_action_list_add_error_query_results, NULL);
 
        lttng_dynamic_pointer_array_init(&action_list->actions,
                        destroy_lttng_action_list_element);