+++ /dev/null
-/*
- * Copyright (C) 2019 Simon Marchi <simon.marchi@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <common/error.h>
-#include <common/macros.h>
-#include <common/mi-lttng.h>
-#include <lttng/action/action-internal.h>
-#include <lttng/action/rate-policy-internal.h>
-#include <lttng/action/rate-policy.h>
-#include <lttng/action/start-session-internal.h>
-#include <lttng/action/start-session.h>
-
-#define IS_START_SESSION_ACTION(action) \
- (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_START_SESSION)
-
-struct lttng_action_start_session {
- struct lttng_action parent;
-
- /* Owned by this. */
- char *session_name;
- struct lttng_rate_policy *policy;
-};
-
-struct lttng_action_start_session_comm {
- /* Includes the trailing \0. */
- uint32_t session_name_len;
-
- /*
- * Variable data:
- *
- * - session name (null terminated)
- * - policy
- */
- char data[];
-} LTTNG_PACKED;
-
-static const struct lttng_rate_policy *
-lttng_action_start_session_internal_get_rate_policy(
- const struct lttng_action *action);
-
-static struct lttng_action_start_session *action_start_session_from_action(
- struct lttng_action *action)
-{
- LTTNG_ASSERT(action);
-
- return container_of(action, struct lttng_action_start_session, parent);
-}
-
-static const struct lttng_action_start_session *
-action_start_session_from_action_const(const struct lttng_action *action)
-{
- LTTNG_ASSERT(action);
-
- return container_of(action, struct lttng_action_start_session, parent);
-}
-
-static bool lttng_action_start_session_validate(struct lttng_action *action)
-{
- bool valid;
- struct lttng_action_start_session *action_start_session;
-
- if (!action) {
- valid = false;
- goto end;
- }
-
- action_start_session = action_start_session_from_action(action);
-
- /* A non-empty session name is mandatory. */
- if (!action_start_session->session_name ||
- strlen(action_start_session->session_name) == 0) {
- valid = false;
- goto end;
- }
-
- valid = true;
-end:
- return valid;
-}
-
-static bool lttng_action_start_session_is_equal(
- const struct lttng_action *_a, const struct lttng_action *_b)
-{
- bool is_equal = false;
- struct lttng_action_start_session *a, *b;
-
- a = container_of(_a, struct lttng_action_start_session, parent);
- b = container_of(_b, struct lttng_action_start_session, parent);
-
- /* Action is not valid if this is not true. */
- LTTNG_ASSERT(a->session_name);
- LTTNG_ASSERT(b->session_name);
- if (strcmp(a->session_name, b->session_name)) {
- goto end;
- }
-
- is_equal = lttng_rate_policy_is_equal(a->policy, b->policy);
-end:
- return is_equal;
-}
-
-static int lttng_action_start_session_serialize(
- struct lttng_action *action, struct lttng_payload *payload)
-{
- struct lttng_action_start_session *action_start_session;
- struct lttng_action_start_session_comm comm;
- size_t session_name_len;
- int ret;
-
- LTTNG_ASSERT(action);
- LTTNG_ASSERT(payload);
-
- action_start_session = action_start_session_from_action(action);
-
- LTTNG_ASSERT(action_start_session->session_name);
-
- DBG("Serializing start session action: session-name: %s",
- action_start_session->session_name);
-
- session_name_len = strlen(action_start_session->session_name) + 1;
- comm.session_name_len = session_name_len;
-
- ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, sizeof(comm));
- if (ret) {
- ret = -1;
- goto end;
- }
-
- ret = lttng_dynamic_buffer_append(&payload->buffer,
- action_start_session->session_name, session_name_len);
- if (ret) {
- ret = -1;
- goto end;
- }
-
- ret = lttng_rate_policy_serialize(
- action_start_session->policy, payload);
- if (ret) {
- ret = -1;
- goto end;
- }
-
- ret = 0;
-end:
- return ret;
-}
-
-static void lttng_action_start_session_destroy(struct lttng_action *action)
-{
- struct lttng_action_start_session *action_start_session;
-
- if (!action) {
- goto end;
- }
-
- action_start_session = action_start_session_from_action(action);
-
- lttng_rate_policy_destroy(action_start_session->policy);
- free(action_start_session->session_name);
- free(action_start_session);
-
-end:
- return;
-}
-
-ssize_t lttng_action_start_session_create_from_payload(
- struct lttng_payload_view *view,
- struct lttng_action **p_action)
-{
- ssize_t consumed_len, ret;
- const struct lttng_action_start_session_comm *comm;
- const char *session_name;
- struct lttng_action *action = NULL;
- enum lttng_action_status status;
- struct lttng_rate_policy *policy = NULL;
-
- comm = (typeof(comm)) view->buffer.data;
- session_name = (const char *) &comm->data;
-
- /* Session name */
- if (!lttng_buffer_view_contains_string(&view->buffer, session_name,
- comm->session_name_len)) {
- consumed_len = -1;
- goto end;
- }
- consumed_len = sizeof(*comm) + comm->session_name_len;
-
- /* Rate policy. */
- {
- struct lttng_payload_view policy_view =
- lttng_payload_view_from_view(
- view, consumed_len, -1);
- ret = lttng_rate_policy_create_from_payload(
- &policy_view, &policy);
- if (ret < 0) {
- consumed_len = -1;
- goto end;
- }
- consumed_len += ret;
- }
-
- action = lttng_action_start_session_create();
- if (!action) {
- consumed_len = -1;
- goto end;
- }
-
- status = lttng_action_start_session_set_session_name(
- action, session_name);
- if (status != LTTNG_ACTION_STATUS_OK) {
- consumed_len = -1;
- goto end;
- }
-
- LTTNG_ASSERT(policy);
- status = lttng_action_start_session_set_rate_policy(action, policy);
- if (status != LTTNG_ACTION_STATUS_OK) {
- consumed_len = -1;
- goto end;
- }
-
- *p_action = action;
- action = NULL;
-
-end:
- lttng_rate_policy_destroy(policy);
- lttng_action_start_session_destroy(action);
-
- return consumed_len;
-}
-
-static enum lttng_error_code lttng_action_start_session_mi_serialize(
- const struct lttng_action *action, struct mi_writer *writer)
-{
- int ret;
- enum lttng_error_code ret_code;
- enum lttng_action_status status;
- const char *session_name = NULL;
- const struct lttng_rate_policy *policy = NULL;
-
- LTTNG_ASSERT(action);
- LTTNG_ASSERT(IS_START_SESSION_ACTION(action));
-
- status = lttng_action_start_session_get_session_name(
- action, &session_name);
- LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
- LTTNG_ASSERT(session_name != NULL);
-
- status = lttng_action_start_session_get_rate_policy(action, &policy);
- LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
- LTTNG_ASSERT(policy != NULL);
-
- /* Open action start session element. */
- ret = mi_lttng_writer_open_element(
- writer, mi_lttng_element_action_start_session);
- if (ret) {
- goto mi_error;
- }
-
- /* Session name. */
- ret = mi_lttng_writer_write_element_string(
- writer, mi_lttng_element_session_name, session_name);
- if (ret) {
- goto mi_error;
- }
-
- /* Rate policy. */
- ret_code = lttng_rate_policy_mi_serialize(policy, writer);
- if (ret_code != LTTNG_OK) {
- goto end;
- }
-
- /* Close action start session 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_start_session_create(void)
-{
- struct lttng_action *action = NULL;
- struct lttng_rate_policy *policy = NULL;
- enum lttng_action_status status;
-
- /* Create a every N = 1 rate policy. */
- policy = lttng_rate_policy_every_n_create(1);
- if (!policy) {
- goto end;
- }
-
- action = zmalloc(sizeof(struct lttng_action_start_session));
- if (!action) {
- goto end;
- }
-
- lttng_action_init(action, LTTNG_ACTION_TYPE_START_SESSION,
- lttng_action_start_session_validate,
- lttng_action_start_session_serialize,
- lttng_action_start_session_is_equal,
- lttng_action_start_session_destroy,
- lttng_action_start_session_internal_get_rate_policy,
- lttng_action_generic_add_error_query_results,
- lttng_action_start_session_mi_serialize);
-
- status = lttng_action_start_session_set_rate_policy(action, policy);
- if (status != LTTNG_ACTION_STATUS_OK) {
- free(action);
- action = NULL;
- goto end;
- }
-
-end:
- lttng_rate_policy_destroy(policy);
- return action;
-}
-
-enum lttng_action_status lttng_action_start_session_set_session_name(
- struct lttng_action *action, const char *session_name)
-{
- struct lttng_action_start_session *action_start_session;
- enum lttng_action_status status;
-
- if (!action || !IS_START_SESSION_ACTION(action) || !session_name ||
- strlen(session_name) == 0) {
- status = LTTNG_ACTION_STATUS_INVALID;
- goto end;
- }
-
- action_start_session = action_start_session_from_action(action);
-
- free(action_start_session->session_name);
-
- action_start_session->session_name = strdup(session_name);
- if (!action_start_session->session_name) {
- status = LTTNG_ACTION_STATUS_ERROR;
- goto end;
- }
-
- status = LTTNG_ACTION_STATUS_OK;
-end:
- return status;
-}
-
-enum lttng_action_status lttng_action_start_session_get_session_name(
- const struct lttng_action *action, const char **session_name)
-{
- const struct lttng_action_start_session *action_start_session;
- enum lttng_action_status status;
-
- if (!action || !IS_START_SESSION_ACTION(action) || !session_name) {
- status = LTTNG_ACTION_STATUS_INVALID;
- goto end;
- }
-
- action_start_session = action_start_session_from_action_const(action);
-
- *session_name = action_start_session->session_name;
-
- status = LTTNG_ACTION_STATUS_OK;
-end:
- return status;
-}
-
-enum lttng_action_status lttng_action_start_session_set_rate_policy(
- struct lttng_action *action,
- const struct lttng_rate_policy *policy)
-{
- enum lttng_action_status status;
- struct lttng_action_start_session *start_session_action;
- struct lttng_rate_policy *copy = NULL;
-
- if (!action || !policy || !IS_START_SESSION_ACTION(action)) {
- status = LTTNG_ACTION_STATUS_INVALID;
- goto end;
- }
-
- copy = lttng_rate_policy_copy(policy);
- if (!copy) {
- status = LTTNG_ACTION_STATUS_ERROR;
- goto end;
- }
-
- start_session_action = action_start_session_from_action(action);
-
- /* Release the previous rate policy .*/
- lttng_rate_policy_destroy(start_session_action->policy);
-
- /* Assign the policy. */
- start_session_action->policy = copy;
- status = LTTNG_ACTION_STATUS_OK;
- copy = NULL;
-
-end:
- lttng_rate_policy_destroy(copy);
- return status;
-}
-
-enum lttng_action_status lttng_action_start_session_get_rate_policy(
- const struct lttng_action *action,
- const struct lttng_rate_policy **policy)
-{
- enum lttng_action_status status;
- const struct lttng_action_start_session *start_session_action;
-
- if (!action || !policy || !IS_START_SESSION_ACTION(action)) {
- status = LTTNG_ACTION_STATUS_INVALID;
- goto end;
- }
-
- start_session_action = action_start_session_from_action_const(action);
-
- *policy = start_session_action->policy;
- status = LTTNG_ACTION_STATUS_OK;
-end:
- return status;
-}
-
-static const struct lttng_rate_policy *
-lttng_action_start_session_internal_get_rate_policy(
- const struct lttng_action *action)
-{
- const struct lttng_action_start_session *_action;
- _action = action_start_session_from_action_const(action);
-
- return _action->policy;
-}
projects / lttng-tools.git / blobdiff