--- /dev/null
+/*
+ * error-query.c
+ *
+ * Copyright (C) 2021 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.1-only
+ *
+ */
+
+#include <common/dynamic-array.h>
+#include <common/error.h>
+#include <common/macros.h>
+#include <common/sessiond-comm/sessiond-comm.h>
+#include <lttng/action/action-internal.h>
+#include <lttng/action/group-internal.h>
+#include <lttng/error-query-internal.h>
+#include <lttng/error-query.h>
+#include <lttng/trigger/trigger-internal.h>
+#include <stddef.h>
+
+struct lttng_error_query {
+ enum lttng_error_query_target_type target_type;
+};
+
+struct lttng_error_query_comm {
+ /* enum lttng_error_query_target_type */
+ int8_t target_type;
+ /* Target-specific payload. */
+ char payload[];
+};
+
+struct lttng_error_query_trigger {
+ struct lttng_error_query parent;
+ /* Mutable only because of the reference count. */
+ struct lttng_trigger *trigger;
+};
+
+struct lttng_error_query_action_comm {
+ LTTNG_OPTIONAL_COMM(uint32_t) action_index;
+ /* Trigger payload. */
+ char payload[];
+};
+
+struct lttng_error_query_action {
+ struct lttng_error_query parent;
+ /* Mutable only because of the reference count. */
+ struct lttng_trigger *trigger;
+ /*
+ * Index of the target action. Since action lists can't be nested,
+ * the targetted action is the top-level group if the action_index is
+ * unset. Otherwise, the index refers to the index within the top-level
+ * group.
+ */
+ LTTNG_OPTIONAL(unsigned int) action_index;
+};
+
+struct lttng_error_query_result {
+ enum lttng_error_query_result_type type;
+ char *name;
+ char *description;
+};
+
+struct lttng_error_query_result_comm {
+ /* enum lttng_error_query_result_type */
+ uint8_t type;
+ /* Length of name (including null-terminator). */
+ uint32_t name_len;
+ /* Length of description (including null-terminator). */
+ uint32_t description_len;
+ /* Name, description, and type-specific payload follow. */
+ char payload[];
+} LTTNG_PACKED;
+
+struct lttng_error_query_result_counter_comm {
+ uint64_t value;
+} LTTNG_PACKED;
+
+struct lttng_error_query_result_counter {
+ struct lttng_error_query_result parent;
+ uint64_t value;
+};
+
+struct lttng_error_query_results_comm {
+ uint32_t count;
+ /* `count` instances of `struct lttng_error_query_result` follow. */
+ char payload[];
+} LTTNG_PACKED;
+
+struct lttng_error_query_results {
+ struct lttng_dynamic_pointer_array results;
+};
+
+
+struct lttng_error_query *lttng_error_query_trigger_create(
+ const struct lttng_trigger *trigger)
+{
+ struct lttng_error_query_trigger *query = NULL;
+ struct lttng_trigger *trigger_copy;
+
+ trigger_copy = lttng_trigger_copy(trigger);
+ if (!trigger_copy) {
+ goto end;
+ }
+
+ if (!trigger) {
+ goto end;
+ }
+
+ query = zmalloc(sizeof(*query));
+ if (!query) {
+ PERROR("Failed to allocate trigger error query");
+ goto end;
+ }
+
+ query->parent.target_type = LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER;
+ query->trigger = trigger_copy;
+end:
+ return query ? &query->parent : NULL;
+}
+
+extern struct lttng_error_query *lttng_error_query_action_create(
+ const struct lttng_trigger *trigger,
+ const struct lttng_action *action)
+{
+ struct lttng_error_query_action *query = NULL;
+ typeof(query->action_index) action_index;
+ struct lttng_trigger *trigger_copy;
+
+ if (!trigger || !action) {
+ goto end;
+ }
+
+ trigger_copy = lttng_trigger_copy(trigger);
+ if (!trigger_copy) {
+ goto end;
+ }
+
+ /*
+ * If an action is not the top-level action of the trigger, our only
+ * hope of finding its position is if the top-level action is an
+ * action list.
+ *
+ * Note that action comparisons are performed by pointer since multiple
+ * otherwise identical actions can be found in an action group (two
+ * notify actions, for example).
+ */
+ if (action != trigger->action &&
+ lttng_action_get_type(trigger->action) ==
+ LTTNG_ACTION_TYPE_GROUP) {
+ unsigned int i, action_group_count;
+ enum lttng_action_status action_status;
+
+ action_status = lttng_action_group_get_count(
+ trigger->action, &action_group_count);
+ if (action_status != LTTNG_ACTION_STATUS_OK) {
+ goto end;
+ }
+
+ for (i = 0; i < action_group_count; i++) {
+ const struct lttng_action *candidate_action =
+ lttng_action_group_get_at_index(
+ trigger->action, i);
+
+ assert(candidate_action);
+ if (candidate_action == action) {
+ LTTNG_OPTIONAL_SET(&action_index, i);
+ break;
+ }
+ }
+
+ if (!action_index.is_set) {
+ /* Not found; invalid action. */
+ goto end;
+ }
+ } else {
+ /*
+ * Trigger action is not a group and not equal to the target
+ * action; invalid action provided.
+ */
+ goto end;
+ }
+
+ query = zmalloc(sizeof(*query));
+ if (!query) {
+ PERROR("Failed to allocate action error query");
+ goto end;
+ }
+
+ query->parent.target_type = LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION;
+ query->trigger = trigger_copy;
+ query->action_index = action_index;
+end:
+ return query ? &query->parent : NULL;
+}
+
+void lttng_error_query_destroy(struct lttng_error_query *query)
+{
+ struct lttng_error_query_trigger *trigger_query;
+
+ if (!query) {
+ return;
+ }
+
+ trigger_query = container_of(query, typeof(*trigger_query), parent);
+ lttng_trigger_put(trigger_query->trigger);
+ free(trigger_query);
+}
+
+static
+int lttng_error_query_result_counter_serialize(
+ const struct lttng_error_query_result *result,
+ struct lttng_payload *payload)
+{
+ const struct lttng_error_query_result_counter *counter_result;
+
+ assert(result->type == LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER);
+ counter_result = container_of(result, typeof(*counter_result), parent);
+
+ return lttng_dynamic_buffer_append(&payload->buffer,
+ &(struct lttng_error_query_result_counter_comm) {
+ .value = counter_result->value
+ },
+ sizeof(struct lttng_error_query_result_counter_comm));
+}
+
+LTTNG_HIDDEN
+int lttng_error_query_result_serialize(
+ const struct lttng_error_query_result *result,
+ struct lttng_payload *payload)
+{
+ int ret;
+ struct lttng_error_query_result_comm header = {
+ .type = (uint8_t) result->type,
+ .name_len = (typeof(header.name_len)) strlen(result->name) + 1,
+ .description_len = (typeof(header.name_len)) strlen(result->description) + 1,
+ };
+
+ /* Header. */
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &header, sizeof(header));
+ if (ret) {
+ ERR("Failed to append error query result communication header to payload");
+ goto end;
+ }
+
+ /* Name. */
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, result->name, header.name_len);
+ if (ret) {
+ ERR("Failed to append error query result name to payload");
+ goto end;
+ }
+
+ /* Description. */
+ ret = lttng_dynamic_buffer_append(&payload->buffer, result->description,
+ header.description_len);
+ if (ret) {
+ ERR("Failed to append error query result description to payload");
+ goto end;
+ }
+
+ /* Type-specific payload. */
+ switch (result->type) {
+ case LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER:
+ ret = lttng_error_query_result_counter_serialize(
+ result, payload);
+ if (ret) {
+ ERR("Failed to serialize counter error query result");
+ goto end;
+ }
+ break;
+ default:
+ abort();
+ }
+
+end:
+ return ret;
+}
+
+static
+int lttng_error_query_result_init(
+ struct lttng_error_query_result *result,
+ enum lttng_error_query_result_type result_type,
+ const char *name,
+ const char *description)
+{
+ int ret;
+
+ assert(name);
+ assert(description);
+
+ result->type = result_type;
+
+ result->name = strdup(name);
+ if (!result->name) {
+ PERROR("Failed to copy error query result name");
+ ret = -1;
+ goto end;
+ }
+
+ result->description = strdup(description);
+ if (!result->description) {
+ PERROR("Failed to copy error query result description");
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+void lttng_error_query_result_destroy(struct lttng_error_query_result *counter)
+{
+ if (!counter) {
+ return;
+ }
+
+ switch (counter->type) {
+ case LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER:
+ /* Nothing to tear down. */
+ break;
+ default:
+ abort();
+ }
+
+ free(counter->name);
+ free(counter->description);
+ free(counter);
+}
+
+LTTNG_HIDDEN
+struct lttng_error_query_result *
+lttng_error_query_result_counter_create(
+ const char *name, const char *description, uint64_t value)
+{
+ int init_ret;
+ struct lttng_error_query_result_counter *counter;
+
+ counter = zmalloc(sizeof(*counter));
+ if (!counter) {
+ PERROR("Failed to allocate error query counter result");
+ goto end;
+ }
+
+ init_ret = lttng_error_query_result_init(&counter->parent,
+ LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER, name,
+ description);
+ if (init_ret) {
+ goto error;
+ }
+
+ goto end;
+error:
+ lttng_error_query_result_destroy(&counter->parent);
+end:
+ return counter ? &counter->parent : NULL;
+}
+
+static
+void destroy_result(void *ptr)
+{
+ struct lttng_error_query_result *result = (typeof(result)) ptr;
+
+ lttng_error_query_result_destroy(result);
+}
+
+LTTNG_HIDDEN
+struct lttng_error_query_results *lttng_error_query_results_create(void)
+{
+ struct lttng_error_query_results *set = zmalloc(sizeof(*set));
+
+ if (!set) {
+ PERROR("Failed to allocate an error query result set");
+ goto end;
+ }
+
+ lttng_dynamic_pointer_array_init(&set->results, destroy_result);
+end:
+ return set;
+}
+
+LTTNG_HIDDEN
+int lttng_error_query_results_add_result(
+ struct lttng_error_query_results *results,
+ struct lttng_error_query_result *result)
+{
+ return lttng_dynamic_pointer_array_add_pointer(
+ &results->results, result);
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_error_query_result_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_error_query_result **result)
+{
+ ssize_t used_size = 0;
+ struct lttng_error_query_result_comm *header;
+ struct lttng_payload_view header_view =
+ lttng_payload_view_from_view(view, 0, sizeof(*header));
+ const char *name;
+ const char *description;
+
+ if (!lttng_payload_view_is_valid(&header_view)) {
+ used_size = -1;
+ goto end;
+ }
+
+ header = (typeof(header)) header_view.buffer.data;
+ used_size += sizeof(*header);
+
+ {
+ struct lttng_payload_view name_view =
+ lttng_payload_view_from_view(view, used_size,
+ header->name_len);
+
+ if (!lttng_payload_view_is_valid(&name_view) ||
+ !lttng_buffer_view_contains_string(
+ &name_view.buffer,
+ name_view.buffer.data,
+ header->name_len)) {
+ used_size = -1;
+ goto end;
+ }
+
+ name = name_view.buffer.data;
+ used_size += header->name_len;
+ }
+
+ {
+ struct lttng_payload_view description_view =
+ lttng_payload_view_from_view(view, used_size,
+ header->description_len);
+
+ if (!lttng_payload_view_is_valid(&description_view) ||
+ !lttng_buffer_view_contains_string(
+ &description_view.buffer,
+ description_view.buffer.data,
+ header->description_len)) {
+ used_size = -1;
+ goto end;
+ }
+
+ description = description_view.buffer.data;
+ used_size += header->description_len;
+ }
+
+ switch (header->type) {
+ case LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER:
+ {
+ struct lttng_error_query_result_counter_comm *counter;
+ struct lttng_payload_view counter_payload_view =
+ lttng_payload_view_from_view(view, used_size,
+ sizeof(*counter));
+
+ if (!lttng_payload_view_is_valid(&counter_payload_view)) {
+ used_size = -1;
+ goto end;
+ }
+
+ counter = (typeof(counter)) counter_payload_view.buffer.data;
+ *result = lttng_error_query_result_counter_create(
+ name, description, counter->value);
+ if (!*result) {
+ used_size = -1;
+ goto end;
+ }
+
+ used_size += sizeof(*counter);
+ break;
+ }
+ default:
+ used_size = -1;
+ goto end;
+ }
+
+end:
+ return used_size;
+}
+
+LTTNG_HIDDEN
+int lttng_error_query_results_serialize(
+ const struct lttng_error_query_results *results,
+ struct lttng_payload *payload)
+{
+ int ret;
+ size_t result_index;
+ const size_t result_count = lttng_dynamic_pointer_array_get_count(
+ &results->results);
+ const struct lttng_error_query_results_comm header = {
+ .count = (typeof(header.count)) result_count,
+ };
+
+ /* Header. */
+ ret = lttng_dynamic_buffer_append(&payload->buffer, &header, sizeof(header));
+ if (ret) {
+ ERR("Failed to append error query result set header to payload");
+ goto end;
+ }
+
+ /* Results. */
+ for (result_index = 0; result_index < result_count; result_index++) {
+ const struct lttng_error_query_result *result = (typeof(result))
+ lttng_dynamic_pointer_array_get_pointer(
+ &results->results,
+ result_index);
+
+ ret = lttng_error_query_result_serialize(result, payload);
+ if (ret) {
+ ERR("Failed to append error query result to payload");
+ goto end;
+ }
+ }
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_error_query_results_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_error_query_results **_results)
+{
+ size_t result_index;
+ ssize_t total_used_size = 0;
+ struct lttng_error_query_results_comm *header;
+ struct lttng_payload_view header_view =
+ lttng_payload_view_from_view(view, 0, sizeof(*header));
+ struct lttng_error_query_results *results = NULL;
+
+ if (!lttng_payload_view_is_valid(&header_view)) {
+ ERR("Failed to map view to error query result set header");
+ total_used_size = -1;
+ goto end;
+ }
+
+ header = (typeof(header)) header_view.buffer.data;
+ total_used_size += sizeof(*header);
+ results = lttng_error_query_results_create();
+ if (!results) {
+ total_used_size = -1;
+ goto end;
+ }
+
+ for (result_index = 0; result_index < header->count; result_index++) {
+ ssize_t used_size;
+ struct lttng_error_query_result *result;
+ struct lttng_payload_view result_view =
+ lttng_payload_view_from_view(
+ view, total_used_size, -1);
+
+ if (!lttng_payload_view_is_valid(&result_view)) {
+ total_used_size = -1;
+ goto end;
+ }
+
+ used_size = lttng_error_query_result_create_from_payload(
+ &result_view, &result);
+ if (used_size < 0) {
+ total_used_size = -1;
+ goto end;
+ }
+
+ total_used_size += used_size;
+
+ if (lttng_dynamic_pointer_array_add_pointer(
+ &results->results, result)) {
+ lttng_error_query_result_destroy(result);
+ total_used_size = -1;
+ goto end;
+ }
+ }
+
+ *_results = results;
+ results = NULL;
+end:
+ lttng_error_query_results_destroy(results);
+ return total_used_size;
+}
+
+static
+int lttng_error_query_trigger_serialize(const struct lttng_error_query *query,
+ struct lttng_payload *payload)
+{
+ int ret;
+ const struct lttng_error_query_trigger *query_trigger =
+ container_of(query, typeof(*query_trigger), parent);
+
+ if (!lttng_trigger_validate(query_trigger->trigger)) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_trigger_serialize(query_trigger->trigger, payload);
+ if (ret) {
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+static
+int lttng_error_query_action_serialize(const struct lttng_error_query *query,
+ struct lttng_payload *payload)
+{
+ int ret;
+ const struct lttng_error_query_action *query_action =
+ container_of(query, typeof(*query_action), parent);
+ struct lttng_error_query_action_comm header = {
+ .action_index.is_set = query_action->action_index.is_set,
+ .action_index.value = query_action->action_index.value,
+ };
+
+ if (!lttng_trigger_validate(query_action->trigger)) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &header, sizeof(header));
+ if (ret) {
+ goto end;
+ }
+
+ ret = lttng_trigger_serialize(query_action->trigger, payload);
+ if (ret) {
+ goto end;
+ }
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+enum lttng_error_query_target_type lttng_error_query_get_target_type(
+ const struct lttng_error_query *query)
+{
+ return query->target_type;
+}
+
+LTTNG_HIDDEN
+const struct lttng_trigger *lttng_error_query_trigger_borrow_target(
+ const struct lttng_error_query *query)
+{
+ const struct lttng_error_query_trigger *query_trigger =
+ container_of(query, typeof(*query_trigger), parent);
+
+ return query_trigger->trigger;
+}
+
+LTTNG_HIDDEN
+const struct lttng_trigger *lttng_error_query_action_borrow_trigger_target(
+ const struct lttng_error_query *query)
+{
+ const struct lttng_error_query_action *query_action =
+ container_of(query, typeof(*query_action), parent);
+
+ return query_action->trigger;
+}
+
+LTTNG_HIDDEN
+const struct lttng_action *lttng_error_query_action_borrow_action_target(
+ const struct lttng_error_query *query,
+ const struct lttng_trigger *trigger)
+{
+ const struct lttng_action *target_action = NULL;
+ const struct lttng_error_query_action *query_action =
+ container_of(query, typeof(*query_action), parent);
+ const struct lttng_action *trigger_action =
+ lttng_trigger_get_const_action(trigger);
+
+ if (!query_action->action_index.is_set) {
+ target_action = trigger_action;
+ } else {
+ if (lttng_action_get_type(trigger_action) !=
+ LTTNG_ACTION_TYPE_GROUP) {
+ ERR("Invalid action error query target index: trigger action is not a group");
+ goto end;
+ }
+
+ target_action = lttng_action_group_get_at_index(trigger_action,
+ LTTNG_OPTIONAL_GET(query_action->action_index));
+ }
+
+end:
+ return target_action;
+}
+
+LTTNG_HIDDEN
+int lttng_error_query_serialize(const struct lttng_error_query *query,
+ struct lttng_payload *payload)
+{
+ int ret;
+ struct lttng_error_query_comm header = {
+ .target_type = (typeof(header.target_type)) query->target_type,
+ };
+
+ ret = lttng_dynamic_buffer_append(
+ &payload->buffer, &header, sizeof(header));
+ if (ret) {
+ ERR("Failed to append error query header to payload");
+ goto end;
+ }
+
+ switch (query->target_type) {
+ case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER:
+ ret = lttng_error_query_trigger_serialize(query, payload);
+ if (ret) {
+ goto end;
+ }
+
+ break;
+ case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION:
+ ret = lttng_error_query_action_serialize(query, payload);
+ if (ret) {
+ goto end;
+ }
+
+ break;
+ default:
+ abort();
+ }
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_error_query_create_from_payload(struct lttng_payload_view *view,
+ struct lttng_error_query **query)
+{
+ ssize_t used_size = 0;
+ struct lttng_error_query_comm *header;
+ struct lttng_payload_view header_view =
+ lttng_payload_view_from_view(view, 0, sizeof(*header));
+
+ if (!lttng_payload_view_is_valid(&header_view)) {
+ ERR("Failed to map error query header");
+ used_size = -1;
+ goto end;
+ }
+
+ used_size = sizeof(*header);
+
+ header = (typeof(header)) header_view.buffer.data;
+ switch ((enum lttng_error_query_target_type) header->target_type) {
+ case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER:
+ {
+ struct lttng_trigger *trigger;
+ ssize_t trigger_used_size;
+ struct lttng_payload_view trigger_view =
+ lttng_payload_view_from_view(
+ view, used_size, -1);
+
+ if (!lttng_payload_view_is_valid(&trigger_view)) {
+ used_size = -1;
+ goto end;
+ }
+
+ trigger_used_size = lttng_trigger_create_from_payload(
+ &trigger_view, &trigger);
+ if (trigger_used_size < 0) {
+ used_size = -1;
+ goto end;
+ }
+
+ used_size += trigger_used_size;
+
+ *query = lttng_error_query_trigger_create(trigger);
+ lttng_trigger_put(trigger);
+ if (!*query) {
+ used_size = -1;
+ goto end;
+ }
+
+ break;
+ }
+ case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION:
+ {
+ struct lttng_trigger *trigger;
+ const struct lttng_action *target_action;
+ ssize_t trigger_used_size;
+ struct lttng_error_query_action_comm *action_header;
+
+ {
+ struct lttng_payload_view action_header_view =
+ lttng_payload_view_from_view(view,
+ used_size,
+ sizeof(*action_header));
+
+ if (!lttng_payload_view_is_valid(&action_header_view)) {
+ used_size = -1;
+ goto end;
+ }
+
+ action_header = (typeof(action_header)) action_header_view.buffer.data;
+ used_size += sizeof(*action_header);
+ }
+
+ {
+ struct lttng_payload_view trigger_view =
+ lttng_payload_view_from_view(
+ view, used_size, -1);
+
+ if (!lttng_payload_view_is_valid(&trigger_view)) {
+ used_size = -1;
+ goto end;
+ }
+
+ trigger_used_size = lttng_trigger_create_from_payload(
+ &trigger_view, &trigger);
+ if (trigger_used_size < 0) {
+ used_size = -1;
+ goto end;
+ }
+
+ used_size += trigger_used_size;
+ }
+
+ if (!action_header->action_index.is_set) {
+ target_action = trigger->action;
+ } else {
+ if (lttng_action_get_type(trigger->action) !=
+ LTTNG_ACTION_TYPE_GROUP) {
+ used_size = -1;
+ goto end;
+ }
+
+ target_action = lttng_action_group_get_at_index(
+ trigger->action,
+ action_header->action_index.value);
+ }
+
+ *query = lttng_error_query_action_create(
+ trigger, target_action);
+ lttng_trigger_put(trigger);
+ if (!*query) {
+ used_size = -1;
+ goto end;
+ }
+
+ break;
+ }
+ default:
+ used_size = -1;
+ goto end;
+ }
+
+end:
+ return used_size;
+}
+
+enum lttng_error_query_results_status lttng_error_query_results_get_count(
+ const struct lttng_error_query_results *results,
+ unsigned int *count)
+{
+ enum lttng_error_query_results_status status;
+
+ if (!results || !count) {
+ status = LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER;
+ goto end;
+ }
+
+ *count = lttng_dynamic_pointer_array_get_count(&results->results);
+ status = LTTNG_ERROR_QUERY_RESULTS_STATUS_OK;
+end:
+ return status;
+}
+
+enum lttng_error_query_results_status
+lttng_error_query_results_get_result(
+ const struct lttng_error_query_results *results,
+ const struct lttng_error_query_result **result,
+ unsigned int index)
+{
+ unsigned int result_count;
+ enum lttng_error_query_results_status status;
+
+ if (!results || !result) {
+ status = LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER;
+ goto end;
+ }
+
+ status = lttng_error_query_results_get_count(results, &result_count);
+ if (status != LTTNG_ERROR_QUERY_RESULTS_STATUS_OK) {
+ goto end;
+ }
+
+ if (index >= result_count) {
+ status = LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER;
+ goto end;
+ }
+
+ *result = (typeof(*result)) lttng_dynamic_pointer_array_get_pointer(
+ &results->results, index);
+ assert(*result);
+ status = LTTNG_ERROR_QUERY_RESULTS_STATUS_OK;
+end:
+ return status;
+}
+
+void lttng_error_query_results_destroy(
+ struct lttng_error_query_results *results)
+{
+ if (!results) {
+ return;
+ }
+
+ lttng_dynamic_pointer_array_reset(&results->results);
+ free(results);
+}
+
+enum lttng_error_query_result_type
+lttng_error_query_result_get_type(const struct lttng_error_query_result *result)
+{
+ return result ? result->type : LTTNG_ERROR_QUERY_RESULT_TYPE_UNKNOWN;
+}
+
+enum lttng_error_query_result_status lttng_error_query_result_get_name(
+ const struct lttng_error_query_result *result,
+ const char **name)
+{
+ enum lttng_error_query_result_status status;
+
+ if (!result || !name) {
+ status = LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER;
+ goto end;
+ }
+
+ *name = result->name;
+ status = LTTNG_ERROR_QUERY_RESULT_STATUS_OK;
+end:
+ return status;
+}
+
+enum lttng_error_query_result_status lttng_error_query_result_get_description(
+ const struct lttng_error_query_result *result,
+ const char **description)
+{
+ enum lttng_error_query_result_status status;
+
+ if (!result || !description) {
+ status = LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER;
+ goto end;
+ }
+
+ *description = result->description;
+ status = LTTNG_ERROR_QUERY_RESULT_STATUS_OK;
+end:
+ return status;
+}
+
+enum lttng_error_query_result_status lttng_error_query_result_counter_get_value(
+ const struct lttng_error_query_result *result,
+ uint64_t *value)
+{
+ enum lttng_error_query_result_status status;
+ const struct lttng_error_query_result_counter *counter_result;
+
+ if (!result || !value ||
+ result->type != LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER) {
+ status = LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER;
+ goto end;
+ }
+
+ counter_result = container_of(result, typeof(*counter_result), parent);
+
+ *value = counter_result->value;
+ status = LTTNG_ERROR_QUERY_RESULT_STATUS_OK;
+end:
+ return status;
+}
projects / lttng-tools.git / commitdiff
