+++ /dev/null
-/*
- * Copyright (C) 2019 Simon Marchi <simon.marchi@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <common/dynamic-array.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>
-
-#define IS_LIST_ACTION(action) \
- (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_LIST)
-
-struct lttng_action_list {
- struct lttng_action parent;
-
- /* The array owns the action elements. */
- struct lttng_dynamic_pointer_array actions;
-};
-
-struct lttng_action_list_comm {
- uint32_t action_count;
-
- /*
- * Variable data: each element serialized sequentially.
- */
- char data[];
-} LTTNG_PACKED;
-
-static void destroy_lttng_action_list_element(void *ptr)
-{
- struct lttng_action *element = (struct lttng_action *) ptr;
-
- lttng_action_destroy(element);
-}
-
-static struct lttng_action_list *action_list_from_action(
- const struct lttng_action *action)
-{
- LTTNG_ASSERT(action);
-
- return container_of(action, struct lttng_action_list, parent);
-}
-
-static const struct lttng_action_list *action_list_from_action_const(
- const struct lttng_action *action)
-{
- LTTNG_ASSERT(action);
-
- return container_of(action, struct lttng_action_list, parent);
-}
-
-static bool lttng_action_list_validate(struct lttng_action *action)
-{
- unsigned int i, count;
- struct lttng_action_list *action_list;
- bool valid;
-
- LTTNG_ASSERT(IS_LIST_ACTION(action));
-
- action_list = action_list_from_action(action);
-
- count = lttng_dynamic_pointer_array_get_count(&action_list->actions);
-
- for (i = 0; i < count; i++) {
- struct lttng_action *child =
- lttng_dynamic_pointer_array_get_pointer(
- &action_list->actions, i);
-
- LTTNG_ASSERT(child);
-
- if (!lttng_action_validate(child)) {
- valid = false;
- goto end;
- }
- }
-
- valid = true;
-
-end:
- return valid;
-}
-
-static bool lttng_action_list_is_equal(
- const struct lttng_action *_a, const struct lttng_action *_b)
-{
- bool is_equal = false;
- unsigned int i;
- unsigned int a_count, b_count;
-
- if (lttng_action_list_get_count(_a, &a_count) !=
- LTTNG_ACTION_STATUS_OK) {
- goto end;
- }
-
- if (lttng_action_list_get_count(_b, &b_count) !=
- LTTNG_ACTION_STATUS_OK) {
- goto end;
- }
-
- if (a_count != b_count) {
- goto end;
- }
-
- for (i = 0; i < a_count; i++) {
- const struct lttng_action *child_a =
- lttng_action_list_get_at_index(_a, i);
- const struct lttng_action *child_b =
- lttng_action_list_get_at_index(_b, i);
-
- LTTNG_ASSERT(child_a);
- LTTNG_ASSERT(child_b);
-
- if (!lttng_action_is_equal(child_a, child_b)) {
- goto end;
- }
- }
-
- is_equal = true;
-end:
- return is_equal;
-}
-
-static int lttng_action_list_serialize(
- struct lttng_action *action, struct lttng_payload *payload)
-{
- struct lttng_action_list *action_list;
- struct lttng_action_list_comm comm;
- int ret;
- unsigned int i, count;
-
- LTTNG_ASSERT(action);
- LTTNG_ASSERT(payload);
- LTTNG_ASSERT(IS_LIST_ACTION(action));
-
- action_list = action_list_from_action(action);
-
- DBG("Serializing action list");
-
- count = lttng_dynamic_pointer_array_get_count(&action_list->actions);
-
- comm.action_count = count;
-
- ret = lttng_dynamic_buffer_append(
- &payload->buffer, &comm, sizeof(comm));
- if (ret) {
- ret = -1;
- goto end;
- }
-
- for (i = 0; i < count; i++) {
- struct lttng_action *child =
- lttng_dynamic_pointer_array_get_pointer(
- &action_list->actions, i);
-
- LTTNG_ASSERT(child);
-
- ret = lttng_action_serialize(child, payload);
- if (ret) {
- goto end;
- }
- }
-
- ret = 0;
-
-end:
- return ret;
-}
-
-static void lttng_action_list_destroy(struct lttng_action *action)
-{
- struct lttng_action_list *action_list;
-
- if (!action) {
- goto end;
- }
-
- action_list = action_list_from_action(action);
- lttng_dynamic_pointer_array_reset(&action_list->actions);
- free(action_list);
-
-end:
- return;
-}
-
-ssize_t lttng_action_list_create_from_payload(
- struct lttng_payload_view *view,
- struct lttng_action **p_action)
-{
- ssize_t consumed_len;
- const struct lttng_action_list_comm *comm;
- struct lttng_action *list;
- struct lttng_action *child_action = NULL;
- enum lttng_action_status status;
- size_t i;
-
- list = lttng_action_list_create();
- if (!list) {
- consumed_len = -1;
- goto end;
- }
-
- comm = (typeof(comm)) view->buffer.data;
-
- consumed_len = sizeof(struct lttng_action_list_comm);
-
- for (i = 0; i < comm->action_count; i++) {
- ssize_t consumed_len_child;
- struct lttng_payload_view child_view =
- lttng_payload_view_from_view(view, consumed_len,
- view->buffer.size - consumed_len);
-
- if (!lttng_payload_view_is_valid(&child_view)) {
- consumed_len = -1;
- goto end;
- }
-
- consumed_len_child = lttng_action_create_from_payload(
- &child_view, &child_action);
- if (consumed_len_child < 0) {
- consumed_len = -1;
- goto end;
- }
-
- status = lttng_action_list_add_action(list, child_action);
- if (status != LTTNG_ACTION_STATUS_OK) {
- consumed_len = -1;
- goto end;
- }
-
- /* Transfer ownership to the action list. */
- lttng_action_put(child_action);
- child_action = NULL;
-
- consumed_len += consumed_len_child;
- }
-
- *p_action = list;
- list = NULL;
-
-end:
- lttng_action_list_destroy(list);
- return consumed_len;
-}
-
-static enum lttng_action_status lttng_action_list_add_error_query_results(
- const struct lttng_action *action,
- struct lttng_error_query_results *results)
-{
- unsigned int i, count;
- enum lttng_action_status action_status;
- const struct lttng_action_list *list =
- container_of(action, typeof(*list), parent);
-
- action_status = lttng_action_list_get_count(action, &count);
- if (action_status != LTTNG_ACTION_STATUS_OK) {
- goto end;
- }
-
- for (i = 0; i < count; i++) {
- struct lttng_action *inner_action =
- lttng_action_list_borrow_mutable_at_index(action, i);
-
- action_status = lttng_action_add_error_query_results(
- inner_action, results);
- if (action_status != LTTNG_ACTION_STATUS_OK) {
- goto end;
- }
- }
-end:
- return action_status;
-}
-
-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;
-
- LTTNG_ASSERT(action);
- LTTNG_ASSERT(IS_LIST_ACTION(action));
- LTTNG_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;
-
- LTTNG_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;
- struct lttng_action *action;
-
- action_list = zmalloc(sizeof(struct lttng_action_list));
- if (!action_list) {
- action = NULL;
- goto end;
- }
-
- 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_is_equal, lttng_action_list_destroy,
- NULL, lttng_action_list_add_error_query_results, NULL);
-
- lttng_dynamic_pointer_array_init(&action_list->actions,
- destroy_lttng_action_list_element);
-
-end:
- return action;
-}
-
-enum lttng_action_status lttng_action_list_add_action(
- struct lttng_action *list, struct lttng_action *action)
-{
- struct lttng_action_list *action_list;
- enum lttng_action_status status;
- int ret;
-
- if (!list || !IS_LIST_ACTION(list) || !action) {
- status = LTTNG_ACTION_STATUS_INVALID;
- goto end;
- }
-
- /*
- * Don't allow adding lists in lists for now, since we're afraid of
- * cycles.
- */
- if (IS_LIST_ACTION(action)) {
- status = LTTNG_ACTION_STATUS_INVALID;
- goto end;
- }
-
- action_list = action_list_from_action(list);
-
- ret = lttng_dynamic_pointer_array_add_pointer(&action_list->actions,
- action);
- if (ret < 0) {
- status = LTTNG_ACTION_STATUS_ERROR;
- goto end;
- }
-
- /* Take ownership of the object. */
- lttng_action_get(action);
- status = LTTNG_ACTION_STATUS_OK;
-end:
- return status;
-}
-
-enum lttng_action_status lttng_action_list_get_count(
- const struct lttng_action *list, unsigned int *count)
-{
- const struct lttng_action_list *action_list;
- enum lttng_action_status status = LTTNG_ACTION_STATUS_OK;
-
- if (!list || !IS_LIST_ACTION(list)) {
- status = LTTNG_ACTION_STATUS_INVALID;
- *count = 0;
- goto end;
- }
-
- action_list = action_list_from_action_const(list);
- *count = lttng_dynamic_pointer_array_get_count(&action_list->actions);
-end:
- return status;
-}
-
-const struct lttng_action *lttng_action_list_get_at_index(
- const struct lttng_action *list, unsigned int index)
-{
- return lttng_action_list_borrow_mutable_at_index(list, index);
-}
-
-struct lttng_action *lttng_action_list_borrow_mutable_at_index(
- const struct lttng_action *list, unsigned int index)
-{
- unsigned int count;
- const struct lttng_action_list *action_list;
- struct lttng_action *action = NULL;
-
- if (lttng_action_list_get_count(list, &count) !=
- LTTNG_ACTION_STATUS_OK) {
- goto end;
- }
-
- if (index >= count) {
- goto end;
- }
-
- action_list = action_list_from_action_const(list);
- action = lttng_dynamic_pointer_array_get_pointer(&action_list->actions,
- index);
-end:
- return action;
-}
projects / lttng-tools.git / blobdiff