--- /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/stop-session-internal.h>
+#include <lttng/action/stop-session.h>
+
+#define IS_STOP_SESSION_ACTION(action) \
+ (lttng_action_get_type(action) == LTTNG_ACTION_TYPE_STOP_SESSION)
+
+struct lttng_action_stop_session {
+ struct lttng_action parent;
+
+ /* Owned by this. */
+ char *session_name;
+ struct lttng_rate_policy *policy;
+};
+
+struct lttng_action_stop_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_stop_session_internal_get_rate_policy(
+ const struct lttng_action *action);
+
+static struct lttng_action_stop_session *action_stop_session_from_action(
+ struct lttng_action *action)
+{
+ LTTNG_ASSERT(action);
+
+ return container_of(action, struct lttng_action_stop_session, parent);
+}
+
+static const struct lttng_action_stop_session *
+action_stop_session_from_action_const(const struct lttng_action *action)
+{
+ LTTNG_ASSERT(action);
+
+ return container_of(action, struct lttng_action_stop_session, parent);
+}
+
+static bool lttng_action_stop_session_validate(struct lttng_action *action)
+{
+ bool valid;
+ struct lttng_action_stop_session *action_stop_session;
+
+ if (!action) {
+ valid = false;
+ goto end;
+ }
+
+ action_stop_session = action_stop_session_from_action(action);
+
+ /* A non-empty session name is mandatory. */
+ if (!action_stop_session->session_name ||
+ strlen(action_stop_session->session_name) == 0) {
+ valid = false;
+ goto end;
+ }
+
+ valid = true;
+end:
+ return valid;
+}
+
+static bool lttng_action_stop_session_is_equal(
+ const struct lttng_action *_a, const struct lttng_action *_b)
+{
+ bool is_equal = false;
+ const struct lttng_action_stop_session *a, *b;
+
+ a = action_stop_session_from_action_const(_a);
+ b = action_stop_session_from_action_const(_b);
+
+ /* 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_stop_session_serialize(
+ struct lttng_action *action, struct lttng_payload *payload)
+{
+ struct lttng_action_stop_session *action_stop_session;
+ struct lttng_action_stop_session_comm comm;
+ size_t session_name_len;
+ int ret;
+
+ LTTNG_ASSERT(action);
+ LTTNG_ASSERT(payload);
+
+ action_stop_session = action_stop_session_from_action(action);
+
+ LTTNG_ASSERT(action_stop_session->session_name);
+
+ DBG("Serializing stop session action: session-name: %s",
+ action_stop_session->session_name);
+
+ session_name_len = strlen(action_stop_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_stop_session->session_name, session_name_len);
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = lttng_rate_policy_serialize(action_stop_session->policy, payload);
+ if (ret) {
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+end:
+ return ret;
+}
+
+static void lttng_action_stop_session_destroy(struct lttng_action *action)
+{
+ struct lttng_action_stop_session *action_stop_session;
+
+ if (!action) {
+ goto end;
+ }
+
+ action_stop_session = action_stop_session_from_action(action);
+
+ lttng_rate_policy_destroy(action_stop_session->policy);
+ free(action_stop_session->session_name);
+ free(action_stop_session);
+
+end:
+ return;
+}
+
+ssize_t lttng_action_stop_session_create_from_payload(
+ struct lttng_payload_view *view,
+ struct lttng_action **p_action)
+{
+ ssize_t consumed_len, ret;
+ const struct lttng_action_stop_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_stop_session_create();
+ if (!action) {
+ consumed_len = -1;
+ goto end;
+ }
+
+ status = lttng_action_stop_session_set_session_name(
+ action, session_name);
+ if (status != LTTNG_ACTION_STATUS_OK) {
+ consumed_len = -1;
+ goto end;
+ }
+
+ LTTNG_ASSERT(policy);
+ status = lttng_action_stop_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_stop_session_destroy(action);
+
+ return consumed_len;
+}
+
+static enum lttng_error_code lttng_action_stop_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_STOP_SESSION_ACTION(action));
+
+ status = lttng_action_stop_session_get_session_name(
+ action, &session_name);
+ LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
+ LTTNG_ASSERT(session_name != NULL);
+
+ status = lttng_action_stop_session_get_rate_policy(action, &policy);
+ LTTNG_ASSERT(status == LTTNG_ACTION_STATUS_OK);
+ LTTNG_ASSERT(policy != NULL);
+
+ /* Open action stop session. */
+ 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 stop 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_stop_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 = (lttng_action *) zmalloc(sizeof(struct lttng_action_stop_session));
+ if (!action) {
+ goto end;
+ }
+
+ lttng_action_init(action, LTTNG_ACTION_TYPE_STOP_SESSION,
+ lttng_action_stop_session_validate,
+ lttng_action_stop_session_serialize,
+ lttng_action_stop_session_is_equal,
+ lttng_action_stop_session_destroy,
+ lttng_action_stop_session_internal_get_rate_policy,
+ lttng_action_generic_add_error_query_results,
+ lttng_action_stop_session_mi_serialize);
+
+ status = lttng_action_stop_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_stop_session_set_session_name(
+ struct lttng_action *action, const char *session_name)
+{
+ struct lttng_action_stop_session *action_stop_session;
+ enum lttng_action_status status;
+
+ if (!action || !IS_STOP_SESSION_ACTION(action) || !session_name ||
+ strlen(session_name) == 0) {
+ status = LTTNG_ACTION_STATUS_INVALID;
+ goto end;
+ }
+
+ action_stop_session = action_stop_session_from_action(action);
+
+ free(action_stop_session->session_name);
+
+ action_stop_session->session_name = strdup(session_name);
+ if (!action_stop_session->session_name) {
+ status = LTTNG_ACTION_STATUS_ERROR;
+ goto end;
+ }
+
+ status = LTTNG_ACTION_STATUS_OK;
+end:
+ return status;
+}
+
+enum lttng_action_status lttng_action_stop_session_get_session_name(
+ const struct lttng_action *action, const char **session_name)
+{
+ const struct lttng_action_stop_session *action_stop_session;
+ enum lttng_action_status status;
+
+ if (!action || !IS_STOP_SESSION_ACTION(action) || !session_name) {
+ status = LTTNG_ACTION_STATUS_INVALID;
+ goto end;
+ }
+
+ action_stop_session = action_stop_session_from_action_const(action);
+
+ *session_name = action_stop_session->session_name;
+
+ status = LTTNG_ACTION_STATUS_OK;
+end:
+ return status;
+}
+
+enum lttng_action_status lttng_action_stop_session_set_rate_policy(
+ struct lttng_action *action,
+ const struct lttng_rate_policy *policy)
+{
+ enum lttng_action_status status;
+ struct lttng_action_stop_session *stop_session_action;
+ struct lttng_rate_policy *copy = NULL;
+
+ if (!action || !policy || !IS_STOP_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;
+ }
+ stop_session_action = action_stop_session_from_action(action);
+
+ /* Free the previous rate policy .*/
+ lttng_rate_policy_destroy(stop_session_action->policy);
+
+ stop_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_stop_session_get_rate_policy(
+ const struct lttng_action *action,
+ const struct lttng_rate_policy **policy)
+{
+ enum lttng_action_status status;
+ const struct lttng_action_stop_session *stop_session_action;
+
+ if (!action || !policy || !IS_STOP_SESSION_ACTION(action)) {
+ status = LTTNG_ACTION_STATUS_INVALID;
+ goto end;
+ }
+
+ stop_session_action = action_stop_session_from_action_const(action);
+
+ *policy = stop_session_action->policy;
+ status = LTTNG_ACTION_STATUS_OK;
+end:
+ return status;
+}
+
+static const struct lttng_rate_policy *
+lttng_action_stop_session_internal_get_rate_policy(
+ const struct lttng_action *action)
+{
+ const struct lttng_action_stop_session *_action;
+ _action = action_stop_session_from_action_const(action);
+
+ return _action->policy;
+}
projects / lttng-tools.git / blobdiff