--- /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_action *) 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_action *) 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 = (lttng_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_action *) lttng_dynamic_pointer_array_get_pointer(&action_list->actions,
+ index);
+end:
+ return action;
+}
projects / lttng-tools.git / blobdiff