-/*
- * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#include <lttng/trigger/trigger.h>
-#include <lttng/lttng-error.h>
-#include "notification-thread.h"
-#include "notification-thread-commands.h"
-#include <common/error.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <inttypes.h>
-
-static
-void init_notification_thread_command(struct notification_thread_command *cmd)
-{
- CDS_INIT_LIST_HEAD(&cmd->cmd_list_node);
- lttng_waiter_init(&cmd->reply_waiter);
-}
-
-static
-int run_command_wait(struct notification_thread_handle *handle,
- struct notification_thread_command *cmd)
-{
- int ret;
- uint64_t notification_counter = 1;
-
- pthread_mutex_lock(&handle->cmd_queue.lock);
- /* Add to queue. */
- cds_list_add_tail(&cmd->cmd_list_node,
- &handle->cmd_queue.list);
- /* Wake-up thread. */
- ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe),
- ¬ification_counter, sizeof(notification_counter));
- if (ret != sizeof(notification_counter)) {
- PERROR("write to notification thread's queue event fd");
- /*
- * Remove the command from the list so the notification
- * thread does not process it.
- */
- cds_list_del(&cmd->cmd_list_node);
- goto error_unlock_queue;
- }
- pthread_mutex_unlock(&handle->cmd_queue.lock);
-
- lttng_waiter_wait(&cmd->reply_waiter);
- return 0;
-error_unlock_queue:
- pthread_mutex_unlock(&handle->cmd_queue.lock);
- return -1;
-}
-
-static
-struct notification_thread_command *notification_thread_command_copy(
- const struct notification_thread_command *original_cmd)
-{
- struct notification_thread_command *new_cmd;
-
- new_cmd = zmalloc(sizeof(*new_cmd));
- if (!new_cmd) {
- goto end;
- }
-
- *new_cmd = *original_cmd;
- init_notification_thread_command(new_cmd);
-end:
- return new_cmd;
-}
-
-static
-int run_command_no_wait(struct notification_thread_handle *handle,
- const struct notification_thread_command *in_cmd)
-{
- int ret;
- uint64_t notification_counter = 1;
- struct notification_thread_command *new_cmd =
- notification_thread_command_copy(in_cmd);
-
- if (!new_cmd) {
- goto error;
- }
- new_cmd->is_async = true;
-
- pthread_mutex_lock(&handle->cmd_queue.lock);
- /* Add to queue. */
- cds_list_add_tail(&new_cmd->cmd_list_node,
- &handle->cmd_queue.list);
- /* Wake-up thread. */
- ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe),
- ¬ification_counter, sizeof(notification_counter));
- if (ret != sizeof(notification_counter)) {
- PERROR("write to notification thread's queue event fd");
- /*
- * Remove the command from the list so the notification
- * thread does not process it.
- */
- cds_list_del(&new_cmd->cmd_list_node);
- goto error_unlock_queue;
- }
- pthread_mutex_unlock(&handle->cmd_queue.lock);
- return 0;
-error_unlock_queue:
- free(new_cmd);
- pthread_mutex_unlock(&handle->cmd_queue.lock);
-error:
- return -1;
-}
-
-enum lttng_error_code notification_thread_command_register_trigger(
- struct notification_thread_handle *handle,
- struct lttng_trigger *trigger,
- bool is_trigger_anonymous)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- LTTNG_ASSERT(trigger);
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER;
- lttng_trigger_get(trigger);
- cmd.parameters.register_trigger.trigger = trigger;
- cmd.parameters.register_trigger.is_trigger_anonymous =
- is_trigger_anonymous;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_unregister_trigger(
- struct notification_thread_handle *handle,
- const struct lttng_trigger *trigger)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER;
- cmd.parameters.unregister_trigger.trigger = trigger;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_add_channel(
- struct notification_thread_handle *handle,
- char *session_name, uid_t uid, gid_t gid,
- char *channel_name, uint64_t key,
- enum lttng_domain_type domain, uint64_t capacity)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL;
- cmd.parameters.add_channel.session.name = session_name;
- cmd.parameters.add_channel.session.uid = uid;
- cmd.parameters.add_channel.session.gid = gid;
- cmd.parameters.add_channel.channel.name = channel_name;
- cmd.parameters.add_channel.channel.key = key;
- cmd.parameters.add_channel.channel.domain = domain;
- cmd.parameters.add_channel.channel.capacity = capacity;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_remove_channel(
- struct notification_thread_handle *handle,
- uint64_t key, enum lttng_domain_type domain)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL;
- cmd.parameters.remove_channel.key = key;
- cmd.parameters.remove_channel.domain = domain;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_session_rotation_ongoing(
- struct notification_thread_handle *handle,
- const char *session_name, uid_t uid, gid_t gid,
- uint64_t trace_archive_chunk_id)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING;
- cmd.parameters.session_rotation.session_name = session_name;
- cmd.parameters.session_rotation.uid = uid;
- cmd.parameters.session_rotation.gid = gid;
- cmd.parameters.session_rotation.trace_archive_chunk_id =
- trace_archive_chunk_id;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_session_rotation_completed(
- struct notification_thread_handle *handle,
- const char *session_name, uid_t uid, gid_t gid,
- uint64_t trace_archive_chunk_id,
- struct lttng_trace_archive_location *location)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED;
- cmd.parameters.session_rotation.session_name = session_name;
- cmd.parameters.session_rotation.uid = uid;
- cmd.parameters.session_rotation.gid = gid;
- cmd.parameters.session_rotation.trace_archive_chunk_id =
- trace_archive_chunk_id;
- cmd.parameters.session_rotation.location = location;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_add_tracer_event_source(
- struct notification_thread_handle *handle,
- int tracer_event_source_fd,
- enum lttng_domain_type domain)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- LTTNG_ASSERT(tracer_event_source_fd >= 0);
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_TRACER_EVENT_SOURCE;
- cmd.parameters.tracer_event_source.tracer_event_source_fd =
- tracer_event_source_fd;
- cmd.parameters.tracer_event_source.domain = domain;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
-
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_remove_tracer_event_source(
- struct notification_thread_handle *handle,
- int tracer_event_source_fd)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_TRACER_EVENT_SOURCE;
- cmd.parameters.tracer_event_source.tracer_event_source_fd =
- tracer_event_source_fd;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
-
- ret_code = cmd.reply_code;
-end:
- return ret_code;
-}
-
-enum lttng_error_code notification_thread_command_list_triggers(
- struct notification_thread_handle *handle,
- uid_t uid,
- struct lttng_triggers **triggers)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- LTTNG_ASSERT(handle);
- LTTNG_ASSERT(triggers);
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_LIST_TRIGGERS;
- cmd.parameters.list_triggers.uid = uid;
-
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
-
- ret_code = cmd.reply_code;
- *triggers = cmd.reply.list_triggers.triggers;
-
-end:
- return ret_code;
-}
-
-void notification_thread_command_quit(
- struct notification_thread_handle *handle)
-{
- int ret;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_QUIT;
- ret = run_command_wait(handle, &cmd);
- LTTNG_ASSERT(!ret && cmd.reply_code == LTTNG_OK);
-}
-
-int notification_thread_client_communication_update(
- struct notification_thread_handle *handle,
- notification_client_id id,
- enum client_transmission_status transmission_status)
-{
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_CLIENT_COMMUNICATION_UPDATE;
- cmd.parameters.client_communication_update.id = id;
- cmd.parameters.client_communication_update.status = transmission_status;
- return run_command_no_wait(handle, &cmd);
-}
-
-enum lttng_error_code notification_thread_command_get_trigger(
- struct notification_thread_handle *handle,
- const struct lttng_trigger *trigger,
- struct lttng_trigger **real_trigger)
-{
- int ret;
- enum lttng_error_code ret_code;
- struct notification_thread_command cmd = {};
-
- init_notification_thread_command(&cmd);
-
- cmd.type = NOTIFICATION_COMMAND_TYPE_GET_TRIGGER;
- cmd.parameters.get_trigger.trigger = trigger;
- ret = run_command_wait(handle, &cmd);
- if (ret) {
- ret_code = LTTNG_ERR_UNK;
- goto end;
- }
-
- ret_code = cmd.reply_code;
- *real_trigger = cmd.reply.get_trigger.trigger;
-
-end:
- return ret_code;
-}
-
-/*
- * Takes ownership of the payload if present.
- */
-struct lttng_event_notifier_notification *lttng_event_notifier_notification_create(
- uint64_t tracer_token,
- enum lttng_domain_type domain,
- char *payload,
- size_t payload_size)
-{
- struct lttng_event_notifier_notification *notification = NULL;
-
- LTTNG_ASSERT(domain != LTTNG_DOMAIN_NONE);
- LTTNG_ASSERT((payload && payload_size) || (!payload && !payload_size));
-
- notification = zmalloc(sizeof(struct lttng_event_notifier_notification));
- if (notification == NULL) {
- ERR("Error allocating notification");
- goto end;
- }
-
- notification->tracer_token = tracer_token;
- notification->type = domain;
- notification->capture_buffer = payload;
- notification->capture_buf_size = payload_size;
-
-end:
- return notification;
-}
-
-void lttng_event_notifier_notification_destroy(
- struct lttng_event_notifier_notification *notification)
-{
- if (!notification) {
- return;
- }
-
- free(notification->capture_buffer);
- free(notification);
-}
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