[lttng-tools.git] / src / bin / lttng-sessiond / kernel-consumer.c

/*
 * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License, version 2 only, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>

#include <common/common.h>
#include <common/defaults.h>

#include "consumer.h"
#include "health-sessiond.h"
#include "kernel-consumer.h"

static char *create_channel_path(struct consumer_output *consumer,
		uid_t uid, gid_t gid)
{
	int ret;
	char tmp_path[PATH_MAX];
	char *pathname = NULL;

	assert(consumer);

	/* Get the right path name destination */
	if (consumer->type == CONSUMER_DST_LOCAL) {
		/* Set application path to the destination path */
		ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s",
				consumer->dst.trace_path, consumer->subdir);
		if (ret < 0) {
			PERROR("snprintf kernel channel path");
			goto error;
		}
		pathname = strndup(tmp_path, sizeof(tmp_path));

		/* Create directory */
		ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid);
		if (ret < 0) {
			if (ret != -EEXIST) {
				ERR("Trace directory creation error");
				goto error;
			}
		}
		DBG3("Kernel local consumer tracefile path: %s", pathname);
	} else {
		ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir);
		if (ret < 0) {
			PERROR("snprintf kernel metadata path");
			goto error;
		}
		pathname = strndup(tmp_path, sizeof(tmp_path));
		DBG3("Kernel network consumer subdir path: %s", pathname);
	}

	return pathname;

error:
	free(pathname);
	return NULL;
}

/*
 * Sending a single channel to the consumer with command ADD_CHANNEL.
 */
int kernel_consumer_add_channel(struct consumer_socket *sock,
		struct ltt_kernel_channel *channel, struct ltt_kernel_session *session,
		unsigned int monitor)
{
	int ret;
	char *pathname;
	struct lttcomm_consumer_msg lkm;
	struct consumer_output *consumer;

	/* Safety net */
	assert(channel);
	assert(session);
	assert(session->consumer);

	consumer = session->consumer;

	DBG("Kernel consumer adding channel %s to kernel consumer",
			channel->channel->name);

	if (monitor) {
		pathname = create_channel_path(consumer, session->uid, session->gid);
		if (!pathname) {
			ret = -1;
			goto error;
		}
	} else {
		/* Empty path. */
		pathname = strdup("");
	}

	/* Prep channel message structure */
	consumer_init_channel_comm_msg(&lkm,
			LTTNG_CONSUMER_ADD_CHANNEL,
			channel->fd,
			session->id,
			pathname,
			session->uid,
			session->gid,
			consumer->net_seq_index,
			channel->channel->name,
			channel->stream_count,
			channel->channel->attr.output,
			CONSUMER_CHANNEL_TYPE_DATA,
			channel->channel->attr.tracefile_size,
			channel->channel->attr.tracefile_count,
			monitor,
			channel->channel->attr.live_timer_interval);

	health_code_update();

	ret = consumer_send_channel(sock, &lkm);
	if (ret < 0) {
		goto error;
	}

	health_code_update();

error:
	free(pathname);
	return ret;
}

/*
 * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
 */
int kernel_consumer_add_metadata(struct consumer_socket *sock,
		struct ltt_kernel_session *session, unsigned int monitor)
{
	int ret;
	char *pathname;
	struct lttcomm_consumer_msg lkm;
	struct consumer_output *consumer;

	/* Safety net */
	assert(session);
	assert(session->consumer);
	assert(sock);

	DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd);

	/* Get consumer output pointer */
	consumer = session->consumer;

	if (monitor) {
		pathname = create_channel_path(consumer, session->uid, session->gid);
		if (!pathname) {
			ret = -1;
			goto error;
		}
	} else {
		/* Empty path. */
		pathname = strdup("");
	}

	/* Prep channel message structure */
	consumer_init_channel_comm_msg(&lkm,
			LTTNG_CONSUMER_ADD_CHANNEL,
			session->metadata->fd,
			session->id,
			pathname,
			session->uid,
			session->gid,
			consumer->net_seq_index,
			DEFAULT_METADATA_NAME,
			1,
			DEFAULT_KERNEL_CHANNEL_OUTPUT,
			CONSUMER_CHANNEL_TYPE_METADATA,
			0, 0,
			monitor, 0);

	health_code_update();

	ret = consumer_send_channel(sock, &lkm);
	if (ret < 0) {
		goto error;
	}

	health_code_update();

	/* Prep stream message structure */
	consumer_init_stream_comm_msg(&lkm,
			LTTNG_CONSUMER_ADD_STREAM,
			session->metadata->fd,
			session->metadata_stream_fd,
			0); /* CPU: 0 for metadata. */

	health_code_update();

	/* Send stream and file descriptor */
	ret = consumer_send_stream(sock, consumer, &lkm,
			&session->metadata_stream_fd, 1);
	if (ret < 0) {
		goto error;
	}

	health_code_update();

error:
	free(pathname);
	return ret;
}

/*
 * Sending a single stream to the consumer with command ADD_STREAM.
 */
int kernel_consumer_add_stream(struct consumer_socket *sock,
		struct ltt_kernel_channel *channel, struct ltt_kernel_stream *stream,
		struct ltt_kernel_session *session, unsigned int monitor)
{
	int ret;
	struct lttcomm_consumer_msg lkm;
	struct consumer_output *consumer;

	assert(channel);
	assert(stream);
	assert(session);
	assert(session->consumer);
	assert(sock);

	DBG("Sending stream %d of channel %s to kernel consumer",
			stream->fd, channel->channel->name);

	/* Get consumer output pointer */
	consumer = session->consumer;

	/* Prep stream consumer message */
	consumer_init_stream_comm_msg(&lkm,
			LTTNG_CONSUMER_ADD_STREAM,
			channel->fd,
			stream->fd,
			stream->cpu);

	health_code_update();

	/* Send stream and file descriptor */
	ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1);
	if (ret < 0) {
		goto error;
	}

	health_code_update();

error:
	return ret;
}

/*
 * Sending the notification that all streams were sent with STREAMS_SENT.
 */
int kernel_consumer_streams_sent(struct consumer_socket *sock,
		struct ltt_kernel_session *session, uint64_t channel_key)
{
	int ret;
	struct lttcomm_consumer_msg lkm;
	struct consumer_output *consumer;

	assert(sock);
	assert(session);

	DBG("Sending streams_sent");
	/* Get consumer output pointer */
	consumer = session->consumer;

	/* Prep stream consumer message */
	consumer_init_streams_sent_comm_msg(&lkm,
			LTTNG_CONSUMER_STREAMS_SENT,
			channel_key, consumer->net_seq_index);

	health_code_update();

	/* Send stream and file descriptor */
	ret = consumer_send_msg(sock, &lkm);
	if (ret < 0) {
		goto error;
	}

error:
	return ret;
}

/*
 * Send all stream fds of kernel channel to the consumer.
 */
int kernel_consumer_send_channel_stream(struct consumer_socket *sock,
		struct ltt_kernel_channel *channel, struct ltt_kernel_session *session,
		unsigned int monitor)
{
	int ret;
	struct ltt_kernel_stream *stream;

	/* Safety net */
	assert(channel);
	assert(session);
	assert(session->consumer);
	assert(sock);

	/* Bail out if consumer is disabled */
	if (!session->consumer->enabled) {
		ret = LTTNG_OK;
		goto error;
	}

	DBG("Sending streams of channel %s to kernel consumer",
			channel->channel->name);

	ret = kernel_consumer_add_channel(sock, channel, session, monitor);
	if (ret < 0) {
		goto error;
	}

	/* Send streams */
	cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
		if (!stream->fd) {
			continue;
		}

		/* Add stream on the kernel consumer side. */
		ret = kernel_consumer_add_stream(sock, channel, stream, session,
				monitor);
		if (ret < 0) {
			goto error;
		}
	}

error:
	return ret;
}

/*
 * Send all stream fds of the kernel session to the consumer.
 */
int kernel_consumer_send_session(struct consumer_socket *sock,
		struct ltt_kernel_session *session)
{
	int ret, monitor = 0;
	struct ltt_kernel_channel *chan;

	/* Safety net */
	assert(session);
	assert(session->consumer);
	assert(sock);

	/* Bail out if consumer is disabled */
	if (!session->consumer->enabled) {
		ret = LTTNG_OK;
		goto error;
	}

	/* Don't monitor the streams on the consumer if in flight recorder. */
	if (session->output_traces) {
		monitor = 1;
	}

	DBG("Sending session stream to kernel consumer");

	if (session->metadata_stream_fd >= 0 && session->metadata) {
		ret = kernel_consumer_add_metadata(sock, session, monitor);
		if (ret < 0) {
			goto error;
		}
	}

	/* Send channel and streams of it */
	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
		ret = kernel_consumer_send_channel_stream(sock, chan, session,
				monitor);
		if (ret < 0) {
			goto error;
		}
		if (monitor) {
			/*
			 * Inform the relay that all the streams for the
			 * channel were sent.
			 */
			ret = kernel_consumer_streams_sent(sock, session, chan->fd);
			if (ret < 0) {
				goto error;
			}
		}
	}

	DBG("Kernel consumer FDs of metadata and channel streams sent");

	session->consumer_fds_sent = 1;
	return 0;

error:
	return ret;
}

int kernel_consumer_destroy_channel(struct consumer_socket *socket,
		struct ltt_kernel_channel *channel)
{
	int ret;
	struct lttcomm_consumer_msg msg;

	assert(channel);
	assert(socket);

	DBG("Sending kernel consumer destroy channel key %d", channel->fd);

	memset(&msg, 0, sizeof(msg));
	msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
	msg.u.destroy_channel.key = channel->fd;

	pthread_mutex_lock(socket->lock);
	health_code_update();

	ret = consumer_send_msg(socket, &msg);
	if (ret < 0) {
		goto error;
	}

error:
	health_code_update();
	pthread_mutex_unlock(socket->lock);
	return ret;
}

int kernel_consumer_destroy_metadata(struct consumer_socket *socket,
		struct ltt_kernel_metadata *metadata)
{
	int ret;
	struct lttcomm_consumer_msg msg;

	assert(metadata);
	assert(socket);

	DBG("Sending kernel consumer destroy channel key %d", metadata->fd);

	memset(&msg, 0, sizeof(msg));
	msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
	msg.u.destroy_channel.key = metadata->fd;

	pthread_mutex_lock(socket->lock);
	health_code_update();

	ret = consumer_send_msg(socket, &msg);
	if (ret < 0) {
		goto error;
	}

error:
	health_code_update();
	pthread_mutex_unlock(socket->lock);
	return ret;
}
Commit	Line	Data
f1e16794 DG	1	/*
	2	* Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#define _GNU_SOURCE
6c1c0768	19	#define _LGPL_SOURCE
f1e16794 DG	20	#include <stdio.h>
	21	#include <stdlib.h>
	22	#include <string.h>
	23	#include <sys/stat.h>
	24	#include <unistd.h>
	25
	26	#include <common/common.h>
	27	#include <common/defaults.h>
f1e16794	28
00e2e675	29	#include "consumer.h"
8782cc74	30	#include "health-sessiond.h"
f1e16794 DG	31	#include "kernel-consumer.h"
f1e16794 DG	32
2bba9e53 DG	33	static char create_channel_path(struct consumer_output consumer,
2bba9e53 DG	34	uid_t uid, gid_t gid)
00e2e675 DG	35	{
00e2e675 DG	36	int ret;
ffe60014	37	char tmp_path[PATH_MAX];
2bba9e53	38	char *pathname = NULL;
00e2e675	39
2bba9e53	40	assert(consumer);
00e2e675	41
ffe60014 DG	42	/* Get the right path name destination */
	43	if (consumer->type == CONSUMER_DST_LOCAL) {
	44	/* Set application path to the destination path */
dec56f6c	45	ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s",
ffe60014 DG	46	consumer->dst.trace_path, consumer->subdir);
ffe60014 DG	47	if (ret < 0) {
2bba9e53	48	PERROR("snprintf kernel channel path");
ffe60014 DG	49	goto error;
ffe60014 DG	50	}
2bba9e53	51	pathname = strndup(tmp_path, sizeof(tmp_path));
ffe60014 DG	52
ffe60014 DG	53	/* Create directory */
2bba9e53	54	ret = run_as_mkdir_recursive(pathname, S_IRWXU \| S_IRWXG, uid, gid);
ffe60014 DG	55	if (ret < 0) {
	56	if (ret != -EEXIST) {
	57	ERR("Trace directory creation error");
	58	goto error;
	59	}
	60	}
	61	DBG3("Kernel local consumer tracefile path: %s", pathname);
	62	} else {
	63	ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir);
	64	if (ret < 0) {
2bba9e53	65	PERROR("snprintf kernel metadata path");
ffe60014 DG	66	goto error;
ffe60014 DG	67	}
2bba9e53	68	pathname = strndup(tmp_path, sizeof(tmp_path));
ffe60014 DG	69	DBG3("Kernel network consumer subdir path: %s", pathname);
	70	}
	71
2bba9e53 DG	72	return pathname;
	73
	74	error:
	75	free(pathname);
	76	return NULL;
	77	}
	78
	79	/*
	80	* Sending a single channel to the consumer with command ADD_CHANNEL.
	81	*/
	82	int kernel_consumer_add_channel(struct consumer_socket *sock,
	83	struct ltt_kernel_channel channel, struct ltt_kernel_session session,
	84	unsigned int monitor)
	85	{
	86	int ret;
	87	char *pathname;
	88	struct lttcomm_consumer_msg lkm;
	89	struct consumer_output *consumer;
	90
	91	/* Safety net */
	92	assert(channel);
	93	assert(session);
	94	assert(session->consumer);
	95
	96	consumer = session->consumer;
	97
	98	DBG("Kernel consumer adding channel %s to kernel consumer",
	99	channel->channel->name);
	100
	101	if (monitor) {
	102	pathname = create_channel_path(consumer, session->uid, session->gid);
	103	if (!pathname) {
	104	ret = -1;
	105	goto error;
	106	}
	107	} else {
	108	/* Empty path. */
53efb85a	109	pathname = strdup("");
2bba9e53 DG	110	}
2bba9e53 DG	111
00e2e675 DG	112	/* Prep channel message structure */
	113	consumer_init_channel_comm_msg(&lkm,
	114	LTTNG_CONSUMER_ADD_CHANNEL,
	115	channel->fd,
ffe60014 DG	116	session->id,
	117	pathname,
	118	session->uid,
	119	session->gid,
	120	consumer->net_seq_index,
c30aaa51	121	channel->channel->name,
ffe60014 DG	122	channel->stream_count,
ffe60014 DG	123	channel->channel->attr.output,
1624d5b7 JD	124	CONSUMER_CHANNEL_TYPE_DATA,
1624d5b7 JD	125	channel->channel->attr.tracefile_size,
2bba9e53	126	channel->channel->attr.tracefile_count,
ecc48a90 JD	127	monitor,
ecc48a90 JD	128	channel->channel->attr.live_timer_interval);
00e2e675	129
840cb59c	130	health_code_update();
ca03de58	131
00e2e675 DG	132	ret = consumer_send_channel(sock, &lkm);
	133	if (ret < 0) {
	134	goto error;
	135	}
	136
840cb59c	137	health_code_update();
ca03de58	138
00e2e675	139	error:
53efb85a	140	free(pathname);
00e2e675 DG	141	return ret;
	142	}
	143
	144	/*
	145	* Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
	146	*/
f50f23d9	147	int kernel_consumer_add_metadata(struct consumer_socket *sock,
2bba9e53	148	struct ltt_kernel_session *session, unsigned int monitor)
00e2e675 DG	149	{
00e2e675 DG	150	int ret;
2bba9e53	151	char *pathname;
00e2e675	152	struct lttcomm_consumer_msg lkm;
a7d9a3e7	153	struct consumer_output *consumer;
00e2e675 DG	154
	155	/* Safety net */
	156	assert(session);
	157	assert(session->consumer);
f50f23d9	158	assert(sock);
00e2e675 DG	159
	160	DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd);
	161
	162	/* Get consumer output pointer */
a7d9a3e7	163	consumer = session->consumer;
00e2e675	164
2bba9e53 DG	165	if (monitor) {
	166	pathname = create_channel_path(consumer, session->uid, session->gid);
	167	if (!pathname) {
	168	ret = -1;
a7d9a3e7 DG	169	goto error;
a7d9a3e7 DG	170	}
00e2e675	171	} else {
2bba9e53	172	/* Empty path. */
53efb85a	173	pathname = strdup("");
00e2e675 DG	174	}
	175
	176	/* Prep channel message structure */
	177	consumer_init_channel_comm_msg(&lkm,
	178	LTTNG_CONSUMER_ADD_CHANNEL,
	179	session->metadata->fd,
ffe60014 DG	180	session->id,
	181	pathname,
	182	session->uid,
	183	session->gid,
	184	consumer->net_seq_index,
30079b6b	185	DEFAULT_METADATA_NAME,
ffe60014 DG	186	1,
ffe60014 DG	187	DEFAULT_KERNEL_CHANNEL_OUTPUT,
1624d5b7	188	CONSUMER_CHANNEL_TYPE_METADATA,
2bba9e53	189	0, 0,
ecc48a90	190	monitor, 0);
00e2e675	191
840cb59c	192	health_code_update();
ca03de58	193
00e2e675 DG	194	ret = consumer_send_channel(sock, &lkm);
	195	if (ret < 0) {
	196	goto error;
	197	}
	198
840cb59c	199	health_code_update();
ca03de58	200
00e2e675 DG	201	/* Prep stream message structure */
	202	consumer_init_stream_comm_msg(&lkm,
	203	LTTNG_CONSUMER_ADD_STREAM,
	204	session->metadata->fd,
	205	session->metadata_stream_fd,
1624d5b7	206	0); /* CPU: 0 for metadata. */
00e2e675	207
840cb59c	208	health_code_update();
ca03de58	209
00e2e675	210	/* Send stream and file descriptor */
a7d9a3e7	211	ret = consumer_send_stream(sock, consumer, &lkm,
00e2e675 DG	212	&session->metadata_stream_fd, 1);
	213	if (ret < 0) {
	214	goto error;
	215	}
	216
840cb59c	217	health_code_update();
ca03de58	218
00e2e675	219	error:
53efb85a	220	free(pathname);
00e2e675 DG	221	return ret;
	222	}
	223
	224	/*
	225	* Sending a single stream to the consumer with command ADD_STREAM.
	226	*/
f50f23d9 DG	227	int kernel_consumer_add_stream(struct consumer_socket *sock,
f50f23d9 DG	228	struct ltt_kernel_channel channel, struct ltt_kernel_stream stream,
2bba9e53	229	struct ltt_kernel_session *session, unsigned int monitor)
00e2e675 DG	230	{
00e2e675 DG	231	int ret;
00e2e675	232	struct lttcomm_consumer_msg lkm;
a7d9a3e7	233	struct consumer_output *consumer;
00e2e675 DG	234
	235	assert(channel);
	236	assert(stream);
	237	assert(session);
	238	assert(session->consumer);
f50f23d9	239	assert(sock);
00e2e675 DG	240
	241	DBG("Sending stream %d of channel %s to kernel consumer",
	242	stream->fd, channel->channel->name);
	243
	244	/* Get consumer output pointer */
a7d9a3e7	245	consumer = session->consumer;
00e2e675	246
00e2e675	247	/* Prep stream consumer message */
ffe60014 DG	248	consumer_init_stream_comm_msg(&lkm,
ffe60014 DG	249	LTTNG_CONSUMER_ADD_STREAM,
00e2e675 DG	250	channel->fd,
00e2e675 DG	251	stream->fd,
ffe60014	252	stream->cpu);
00e2e675	253
840cb59c	254	health_code_update();
ca03de58	255
00e2e675	256	/* Send stream and file descriptor */
a7d9a3e7	257	ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1);
00e2e675 DG	258	if (ret < 0) {
	259	goto error;
	260	}
	261
840cb59c	262	health_code_update();
ca03de58	263
00e2e675 DG	264	error:
	265	return ret;
	266	}
	267
a4baae1b JD	268	/*
	269	* Sending the notification that all streams were sent with STREAMS_SENT.
	270	*/
	271	int kernel_consumer_streams_sent(struct consumer_socket *sock,
	272	struct ltt_kernel_session *session, uint64_t channel_key)
	273	{
	274	int ret;
	275	struct lttcomm_consumer_msg lkm;
	276	struct consumer_output *consumer;
	277
	278	assert(sock);
	279	assert(session);
	280
	281	DBG("Sending streams_sent");
	282	/* Get consumer output pointer */
	283	consumer = session->consumer;
	284
	285	/* Prep stream consumer message */
	286	consumer_init_streams_sent_comm_msg(&lkm,
	287	LTTNG_CONSUMER_STREAMS_SENT,
	288	channel_key, consumer->net_seq_index);
	289
	290	health_code_update();
	291
	292	/* Send stream and file descriptor */
	293	ret = consumer_send_msg(sock, &lkm);
	294	if (ret < 0) {
	295	goto error;
	296	}
	297
	298	error:
	299	return ret;
	300	}
	301
f1e16794 DG	302	/*
	303	* Send all stream fds of kernel channel to the consumer.
	304	*/
f50f23d9	305	int kernel_consumer_send_channel_stream(struct consumer_socket *sock,
2bba9e53 DG	306	struct ltt_kernel_channel channel, struct ltt_kernel_session session,
2bba9e53 DG	307	unsigned int monitor)
f1e16794	308	{
00e2e675	309	int ret;
f1e16794	310	struct ltt_kernel_stream *stream;
00e2e675 DG	311
	312	/* Safety net */
	313	assert(channel);
	314	assert(session);
	315	assert(session->consumer);
f50f23d9	316	assert(sock);
00e2e675 DG	317
	318	/* Bail out if consumer is disabled */
	319	if (!session->consumer->enabled) {
f73fabfd	320	ret = LTTNG_OK;
00e2e675 DG	321	goto error;
00e2e675 DG	322	}
f1e16794 DG	323
	324	DBG("Sending streams of channel %s to kernel consumer",
	325	channel->channel->name);
	326
2bba9e53	327	ret = kernel_consumer_add_channel(sock, channel, session, monitor);
f1e16794	328	if (ret < 0) {
f1e16794 DG	329	goto error;
	330	}
	331
	332	/* Send streams */
	333	cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
	334	if (!stream->fd) {
	335	continue;
	336	}
00e2e675 DG	337
00e2e675 DG	338	/* Add stream on the kernel consumer side. */
2bba9e53 DG	339	ret = kernel_consumer_add_stream(sock, channel, stream, session,
2bba9e53 DG	340	monitor);
f1e16794	341	if (ret < 0) {
f1e16794 DG	342	goto error;
	343	}
	344	}
	345
f1e16794 DG	346	error:
	347	return ret;
	348	}
	349
	350	/*
	351	* Send all stream fds of the kernel session to the consumer.
	352	*/
f50f23d9 DG	353	int kernel_consumer_send_session(struct consumer_socket *sock,
f50f23d9 DG	354	struct ltt_kernel_session *session)
f1e16794	355	{
2bba9e53	356	int ret, monitor = 0;
f1e16794	357	struct ltt_kernel_channel *chan;
f1e16794	358
00e2e675 DG	359	/* Safety net */
	360	assert(session);
	361	assert(session->consumer);
f50f23d9	362	assert(sock);
f1e16794	363
00e2e675 DG	364	/* Bail out if consumer is disabled */
00e2e675 DG	365	if (!session->consumer->enabled) {
f73fabfd	366	ret = LTTNG_OK;
00e2e675	367	goto error;
f1e16794 DG	368	}
f1e16794 DG	369
2bba9e53 DG	370	/* Don't monitor the streams on the consumer if in flight recorder. */
	371	if (session->output_traces) {
	372	monitor = 1;
	373	}
	374
00e2e675 DG	375	DBG("Sending session stream to kernel consumer");
00e2e675 DG	376
609af759	377	if (session->metadata_stream_fd >= 0 && session->metadata) {
2bba9e53	378	ret = kernel_consumer_add_metadata(sock, session, monitor);
f1e16794	379	if (ret < 0) {
f1e16794 DG	380	goto error;
f1e16794 DG	381	}
f1e16794 DG	382	}
f1e16794 DG	383
00e2e675	384	/* Send channel and streams of it */
f1e16794	385	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
2bba9e53 DG	386	ret = kernel_consumer_send_channel_stream(sock, chan, session,
2bba9e53 DG	387	monitor);
f1e16794 DG	388	if (ret < 0) {
	389	goto error;
	390	}
601262d6 JD	391	if (monitor) {
	392	/*
	393	* Inform the relay that all the streams for the
	394	* channel were sent.
	395	*/
	396	ret = kernel_consumer_streams_sent(sock, session, chan->fd);
	397	if (ret < 0) {
	398	goto error;
	399	}
	400	}
f1e16794 DG	401	}
f1e16794 DG	402
00e2e675	403	DBG("Kernel consumer FDs of metadata and channel streams sent");
f1e16794	404
4ce9ff51	405	session->consumer_fds_sent = 1;
f1e16794 DG	406	return 0;
	407
	408	error:
	409	return ret;
	410	}
07b86b52 JD	411
	412	int kernel_consumer_destroy_channel(struct consumer_socket *socket,
	413	struct ltt_kernel_channel *channel)
	414	{
	415	int ret;
	416	struct lttcomm_consumer_msg msg;
	417
	418	assert(channel);
	419	assert(socket);
07b86b52 JD	420
	421	DBG("Sending kernel consumer destroy channel key %d", channel->fd);
	422
53efb85a	423	memset(&msg, 0, sizeof(msg));
07b86b52 JD	424	msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
	425	msg.u.destroy_channel.key = channel->fd;
	426
	427	pthread_mutex_lock(socket->lock);
	428	health_code_update();
	429
	430	ret = consumer_send_msg(socket, &msg);
	431	if (ret < 0) {
	432	goto error;
	433	}
	434
	435	error:
	436	health_code_update();
	437	pthread_mutex_unlock(socket->lock);
	438	return ret;
	439	}
	440
	441	int kernel_consumer_destroy_metadata(struct consumer_socket *socket,
	442	struct ltt_kernel_metadata *metadata)
	443	{
	444	int ret;
	445	struct lttcomm_consumer_msg msg;
	446
	447	assert(metadata);
	448	assert(socket);
07b86b52 JD	449
	450	DBG("Sending kernel consumer destroy channel key %d", metadata->fd);
	451
53efb85a	452	memset(&msg, 0, sizeof(msg));
07b86b52 JD	453	msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
	454	msg.u.destroy_channel.key = metadata->fd;
	455
	456	pthread_mutex_lock(socket->lock);
	457	health_code_update();
	458
	459	ret = consumer_send_msg(socket, &msg);
	460	if (ret < 0) {
	461	goto error;
	462	}
	463
	464	error:
	465	health_code_update();
	466	pthread_mutex_unlock(socket->lock);
	467	return ret;
	468	}