[lttng-tools.git] / src / bin / lttng-sessiond / notification-thread-commands.c

/*
 * 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),
			&notification_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),
			&notification_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)
{
	int ret;
	enum lttng_error_code ret_code;
	struct notification_thread_command cmd = {};

	assert(trigger);
	init_notification_thread_command(&cmd);

	cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER;
	lttng_trigger_get(trigger);
	cmd.parameters.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_unregister_trigger(
		struct notification_thread_handle *handle,
		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.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_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 = {};

	assert(handle);
	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);
	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);
}
Commit	Line	Data
ab0ee2ca	1	/*
ab5be9fa	2	* Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
ab0ee2ca	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
ab0ee2ca	5	*
ab0ee2ca JG	6	*/
	7
	8	#include <lttng/trigger/trigger.h>
	9	#include <lttng/lttng-error.h>
	10	#include "notification-thread.h"
	11	#include "notification-thread-commands.h"
	12	#include <common/error.h>
ab0ee2ca JG	13	#include <unistd.h>
	14	#include <stdint.h>
	15	#include <inttypes.h>
	16
	17	static
	18	void init_notification_thread_command(struct notification_thread_command *cmd)
	19	{
ab0ee2ca	20	CDS_INIT_LIST_HEAD(&cmd->cmd_list_node);
8ada111f	21	lttng_waiter_init(&cmd->reply_waiter);
ab0ee2ca JG	22	}
	23
	24	static
	25	int run_command_wait(struct notification_thread_handle *handle,
	26	struct notification_thread_command *cmd)
	27	{
	28	int ret;
	29	uint64_t notification_counter = 1;
	30
ab0ee2ca JG	31	pthread_mutex_lock(&handle->cmd_queue.lock);
	32	/* Add to queue. */
	33	cds_list_add_tail(&cmd->cmd_list_node,
	34	&handle->cmd_queue.list);
	35	/* Wake-up thread. */
58d3fed5	36	ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe),
ab0ee2ca	37	&notification_counter, sizeof(notification_counter));
58d3fed5	38	if (ret != sizeof(notification_counter)) {
ab0ee2ca JG	39	PERROR("write to notification thread's queue event fd");
	40	/*
	41	* Remove the command from the list so the notification
	42	* thread does not process it.
	43	*/
	44	cds_list_del(&cmd->cmd_list_node);
	45	goto error_unlock_queue;
	46	}
	47	pthread_mutex_unlock(&handle->cmd_queue.lock);
	48
8ada111f	49	lttng_waiter_wait(&cmd->reply_waiter);
ab0ee2ca JG	50	return 0;
	51	error_unlock_queue:
	52	pthread_mutex_unlock(&handle->cmd_queue.lock);
	53	return -1;
	54	}
	55
0ab399e0 JG	56	static
	57	struct notification_thread_command *notification_thread_command_copy(
	58	const struct notification_thread_command *original_cmd)
	59	{
	60	struct notification_thread_command *new_cmd;
	61
	62	new_cmd = zmalloc(sizeof(*new_cmd));
	63	if (!new_cmd) {
	64	goto end;
	65	}
	66
	67	new_cmd = original_cmd;
	68	init_notification_thread_command(new_cmd);
	69	end:
	70	return new_cmd;
	71	}
	72
	73	static
	74	int run_command_no_wait(struct notification_thread_handle *handle,
	75	const struct notification_thread_command *in_cmd)
	76	{
	77	int ret;
	78	uint64_t notification_counter = 1;
	79	struct notification_thread_command *new_cmd =
	80	notification_thread_command_copy(in_cmd);
	81
	82	if (!new_cmd) {
	83	goto error;
	84	}
	85	new_cmd->is_async = true;
	86
	87	pthread_mutex_lock(&handle->cmd_queue.lock);
	88	/* Add to queue. */
	89	cds_list_add_tail(&new_cmd->cmd_list_node,
	90	&handle->cmd_queue.list);
	91	/* Wake-up thread. */
	92	ret = lttng_write(lttng_pipe_get_writefd(handle->cmd_queue.event_pipe),
	93	&notification_counter, sizeof(notification_counter));
	94	if (ret != sizeof(notification_counter)) {
	95	PERROR("write to notification thread's queue event fd");
	96	/*
	97	* Remove the command from the list so the notification
	98	* thread does not process it.
	99	*/
	100	cds_list_del(&new_cmd->cmd_list_node);
	101	goto error_unlock_queue;
	102	}
	103	pthread_mutex_unlock(&handle->cmd_queue.lock);
	104	return 0;
	105	error_unlock_queue:
	106	free(new_cmd);
	107	pthread_mutex_unlock(&handle->cmd_queue.lock);
	108	error:
	109	return -1;
	110	}
	111
ab0ee2ca JG	112	enum lttng_error_code notification_thread_command_register_trigger(
	113	struct notification_thread_handle *handle,
	114	struct lttng_trigger *trigger)
	115	{
	116	int ret;
	117	enum lttng_error_code ret_code;
0ab399e0	118	struct notification_thread_command cmd = {};
ab0ee2ca	119
242388e4	120	assert(trigger);
ab0ee2ca JG	121	init_notification_thread_command(&cmd);
	122
	123	cmd.type = NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER;
242388e4	124	lttng_trigger_get(trigger);
ab0ee2ca JG	125	cmd.parameters.trigger = trigger;
	126
	127	ret = run_command_wait(handle, &cmd);
	128	if (ret) {
	129	ret_code = LTTNG_ERR_UNK;
	130	goto end;
	131	}
	132	ret_code = cmd.reply_code;
	133	end:
	134	return ret_code;
	135	}
	136
	137	enum lttng_error_code notification_thread_command_unregister_trigger(
	138	struct notification_thread_handle *handle,
	139	struct lttng_trigger *trigger)
	140	{
	141	int ret;
	142	enum lttng_error_code ret_code;
0ab399e0	143	struct notification_thread_command cmd = {};
ab0ee2ca JG	144
	145	init_notification_thread_command(&cmd);
	146
	147	cmd.type = NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER;
	148	cmd.parameters.trigger = trigger;
	149
	150	ret = run_command_wait(handle, &cmd);
	151	if (ret) {
	152	ret_code = LTTNG_ERR_UNK;
	153	goto end;
	154	}
	155	ret_code = cmd.reply_code;
	156	end:
	157	return ret_code;
	158	}
	159
	160	enum lttng_error_code notification_thread_command_add_channel(
	161	struct notification_thread_handle *handle,
	162	char *session_name, uid_t uid, gid_t gid,
	163	char *channel_name, uint64_t key,
	164	enum lttng_domain_type domain, uint64_t capacity)
	165	{
	166	int ret;
	167	enum lttng_error_code ret_code;
0ab399e0	168	struct notification_thread_command cmd = {};
ab0ee2ca JG	169
	170	init_notification_thread_command(&cmd);
	171
	172	cmd.type = NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL;
8abe313a JG	173	cmd.parameters.add_channel.session.name = session_name;
	174	cmd.parameters.add_channel.session.uid = uid;
	175	cmd.parameters.add_channel.session.gid = gid;
	176	cmd.parameters.add_channel.channel.name = channel_name;
	177	cmd.parameters.add_channel.channel.key = key;
	178	cmd.parameters.add_channel.channel.domain = domain;
	179	cmd.parameters.add_channel.channel.capacity = capacity;
ab0ee2ca JG	180
	181	ret = run_command_wait(handle, &cmd);
	182	if (ret) {
	183	ret_code = LTTNG_ERR_UNK;
	184	goto end;
	185	}
	186	ret_code = cmd.reply_code;
	187	end:
	188	return ret_code;
	189	}
	190
	191	enum lttng_error_code notification_thread_command_remove_channel(
	192	struct notification_thread_handle *handle,
	193	uint64_t key, enum lttng_domain_type domain)
	194	{
	195	int ret;
	196	enum lttng_error_code ret_code;
0ab399e0	197	struct notification_thread_command cmd = {};
ab0ee2ca JG	198
	199	init_notification_thread_command(&cmd);
	200
	201	cmd.type = NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL;
	202	cmd.parameters.remove_channel.key = key;
	203	cmd.parameters.remove_channel.domain = domain;
	204
	205	ret = run_command_wait(handle, &cmd);
	206	if (ret) {
	207	ret_code = LTTNG_ERR_UNK;
	208	goto end;
	209	}
	210	ret_code = cmd.reply_code;
	211	end:
	212	return ret_code;
	213	}
	214
731c1b12 JG	215	enum lttng_error_code notification_thread_command_session_rotation_ongoing(
	216	struct notification_thread_handle *handle,
	217	const char *session_name, uid_t uid, gid_t gid,
	218	uint64_t trace_archive_chunk_id)
	219	{
	220	int ret;
	221	enum lttng_error_code ret_code;
0ab399e0	222	struct notification_thread_command cmd = {};
731c1b12 JG	223
	224	init_notification_thread_command(&cmd);
	225
	226	cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING;
	227	cmd.parameters.session_rotation.session_name = session_name;
	228	cmd.parameters.session_rotation.uid = uid;
	229	cmd.parameters.session_rotation.gid = gid;
	230	cmd.parameters.session_rotation.trace_archive_chunk_id =
	231	trace_archive_chunk_id;
	232
	233	ret = run_command_wait(handle, &cmd);
	234	if (ret) {
	235	ret_code = LTTNG_ERR_UNK;
	236	goto end;
	237	}
	238	ret_code = cmd.reply_code;
	239	end:
	240	return ret_code;
	241	}
	242
	243	enum lttng_error_code notification_thread_command_session_rotation_completed(
	244	struct notification_thread_handle *handle,
	245	const char *session_name, uid_t uid, gid_t gid,
	246	uint64_t trace_archive_chunk_id,
	247	struct lttng_trace_archive_location *location)
	248	{
	249	int ret;
	250	enum lttng_error_code ret_code;
0ab399e0	251	struct notification_thread_command cmd = {};
731c1b12 JG	252
	253	init_notification_thread_command(&cmd);
	254
	255	cmd.type = NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED;
	256	cmd.parameters.session_rotation.session_name = session_name;
	257	cmd.parameters.session_rotation.uid = uid;
	258	cmd.parameters.session_rotation.gid = gid;
	259	cmd.parameters.session_rotation.trace_archive_chunk_id =
	260	trace_archive_chunk_id;
	261	cmd.parameters.session_rotation.location = location;
	262
	263	ret = run_command_wait(handle, &cmd);
	264	if (ret) {
	265	ret_code = LTTNG_ERR_UNK;
	266	goto end;
	267	}
	268	ret_code = cmd.reply_code;
	269	end:
	270	return ret_code;
	271	}
	272
fbc9f37d JR	273	enum lttng_error_code notification_thread_command_list_triggers(
	274	struct notification_thread_handle *handle,
	275	uid_t uid,
	276	struct lttng_triggers **triggers)
	277	{
	278	int ret;
	279	enum lttng_error_code ret_code;
	280	struct notification_thread_command cmd = {};
	281
	282	assert(handle);
	283	assert(triggers);
	284
	285	init_notification_thread_command(&cmd);
	286
	287	cmd.type = NOTIFICATION_COMMAND_TYPE_LIST_TRIGGERS;
	288	cmd.parameters.list_triggers.uid = uid;
	289
	290	ret = run_command_wait(handle, &cmd);
	291	if (ret) {
	292	ret_code = LTTNG_ERR_UNK;
	293	goto end;
	294	}
	295
	296	ret_code = cmd.reply_code;
	297	*triggers = cmd.reply.list_triggers.triggers;
	298
	299	end:
	300	return ret_code;
	301	}
	302
ab0ee2ca JG	303	void notification_thread_command_quit(
	304	struct notification_thread_handle *handle)
	305	{
	306	int ret;
0ab399e0	307	struct notification_thread_command cmd = {};
ab0ee2ca JG	308
	309	init_notification_thread_command(&cmd);
	310
	311	cmd.type = NOTIFICATION_COMMAND_TYPE_QUIT;
	312	ret = run_command_wait(handle, &cmd);
	313	assert(!ret && cmd.reply_code == LTTNG_OK);
	314	}
f2b3ef9f JG	315
	316	int notification_thread_client_communication_update(
	317	struct notification_thread_handle *handle,
	318	notification_client_id id,
	319	enum client_transmission_status transmission_status)
	320	{
	321	struct notification_thread_command cmd = {};
	322
	323	init_notification_thread_command(&cmd);
	324
	325	cmd.type = NOTIFICATION_COMMAND_TYPE_CLIENT_COMMUNICATION_UPDATE;
	326	cmd.parameters.client_communication_update.id = id;
	327	cmd.parameters.client_communication_update.status = transmission_status;
	328	return run_command_no_wait(handle, &cmd);
	329	}