[lttng-tools.git] / src / bin / lttng-relayd / stream.c

/*
 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
 *                      David Goulet <dgoulet@efficios.com>
 *               2015 - Mathieu Desnoyers <mathieu.desnoyers@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
#include <common/common.h>
#include <common/utils.h>
#include <common/defaults.h>
#include <urcu/rculist.h>
#include <sys/stat.h>

#include "lttng-relayd.h"
#include "index.h"
#include "stream.h"
#include "viewer-stream.h"

/* Should be called with RCU read-side lock held. */
bool stream_get(struct relay_stream *stream)
{
	bool has_ref = false;

	pthread_mutex_lock(&stream->reflock);
	if (stream->ref.refcount != 0) {
		has_ref = true;
		urcu_ref_get(&stream->ref);
	}
	pthread_mutex_unlock(&stream->reflock);

	return has_ref;
}

/*
 * Get stream from stream id from the streams hash table. Return stream
 * if found else NULL. A stream reference is taken when a stream is
 * returned. stream_put() must be called on that stream.
 */
struct relay_stream *stream_get_by_id(uint64_t stream_id)
{
	struct lttng_ht_node_u64 *node;
	struct lttng_ht_iter iter;
	struct relay_stream *stream = NULL;

	rcu_read_lock();
	lttng_ht_lookup(relay_streams_ht, &stream_id, &iter);
	node = lttng_ht_iter_get_node_u64(&iter);
	if (!node) {
		DBG("Relay stream %" PRIu64 " not found", stream_id);
		goto end;
	}
	stream = caa_container_of(node, struct relay_stream, node);
	if (!stream_get(stream)) {
		stream = NULL;
	}
end:
	rcu_read_unlock();
	return stream;
}

/*
 * We keep ownership of path_name and channel_name.
 */
struct relay_stream *stream_create(struct ctf_trace *trace,
	uint64_t stream_handle, char *path_name,
	char *channel_name, uint64_t tracefile_size,
	uint64_t tracefile_count)
{
	int ret;
	struct relay_stream *stream = NULL;
	struct relay_session *session = trace->session;

	stream = zmalloc(sizeof(struct relay_stream));
	if (stream == NULL) {
		PERROR("relay stream zmalloc");
		ret = -1;
		goto error_no_alloc;
	}

	stream->stream_handle = stream_handle;
	stream->prev_seq = -1ULL;
	stream->ctf_stream_id = -1ULL;
	stream->tracefile_size = tracefile_size;
	stream->tracefile_count = tracefile_count;
	stream->path_name = path_name;
	stream->channel_name = channel_name;
	lttng_ht_node_init_u64(&stream->node, stream->stream_handle);
	pthread_mutex_init(&stream->lock, NULL);
	pthread_mutex_init(&stream->reflock, NULL);
	urcu_ref_init(&stream->ref);
	ctf_trace_get(trace);
	stream->trace = trace;

	stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
	if (!stream->indexes_ht) {
		ERR("Cannot created indexes_ht");
		ret = -1;
		goto end;
	}

	ret = utils_mkdir_recursive(stream->path_name, S_IRWXU | S_IRWXG,
			-1, -1);
	if (ret < 0) {
		ERR("relay creating output directory");
		goto end;
	}

	/*
	 * No need to use run_as API here because whatever we receive,
	 * the relayd uses its own credentials for the stream files.
	 */
	ret = utils_create_stream_file(stream->path_name, stream->channel_name,
			stream->tracefile_size, 0, -1, -1, NULL);
	if (ret < 0) {
		ERR("Create output file");
		goto end;
	}
	stream->stream_fd = stream_fd_create(ret);
	if (!stream->stream_fd) {
		if (close(ret)) {
			PERROR("Error closing file %d", ret);
		}
		ret = -1;
		goto end;
	}
	stream->tfa = tracefile_array_create(stream->tracefile_count);
	if (!stream->tfa) {
		ret = -1;
		goto end;
	}
	if (stream->tracefile_size) {
		DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name);
	} else {
		DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name);
	}

	if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) {
		stream->is_metadata = 1;
	}

	stream->in_recv_list = true;

	/*
	 * Add the stream in the recv list of the session. Once the end stream
	 * message is received, all session streams are published.
	 */
	pthread_mutex_lock(&session->recv_list_lock);
	cds_list_add_rcu(&stream->recv_node, &session->recv_list);
	session->stream_count++;
	pthread_mutex_unlock(&session->recv_list_lock);

	/*
	 * Both in the ctf_trace object and the global stream ht since the data
	 * side of the relayd does not have the concept of session.
	 */
	lttng_ht_add_unique_u64(relay_streams_ht, &stream->node);
	stream->in_stream_ht = true;

	DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name,
			stream->stream_handle);
	ret = 0;

end:
	if (ret) {
		if (stream->stream_fd) {
			stream_fd_put(stream->stream_fd);
			stream->stream_fd = NULL;
		}
		stream_put(stream);
		stream = NULL;
	}
	return stream;

error_no_alloc:
	/*
	 * path_name and channel_name need to be freed explicitly here
	 * because we cannot rely on stream_put().
	 */
	free(path_name);
	free(channel_name);
	return NULL;
}

/*
 * Called with the session lock held.
 */
void stream_publish(struct relay_stream *stream)
{
	struct relay_session *session;

	pthread_mutex_lock(&stream->lock);
	if (stream->published) {
		goto unlock;
	}

	session = stream->trace->session;

	pthread_mutex_lock(&session->recv_list_lock);
	if (stream->in_recv_list) {
		cds_list_del_rcu(&stream->recv_node);
		stream->in_recv_list = false;
	}
	pthread_mutex_unlock(&session->recv_list_lock);

	pthread_mutex_lock(&stream->trace->stream_list_lock);
	cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list);
	pthread_mutex_unlock(&stream->trace->stream_list_lock);

	stream->published = true;
unlock:
	pthread_mutex_unlock(&stream->lock);
}

/*
 * Stream must be protected by holding the stream lock or by virtue of being
 * called from stream_destroy, in which case it is guaranteed to be accessed
 * from a single thread by the reflock.
 */
static void stream_unpublish(struct relay_stream *stream)
{
	if (stream->in_stream_ht) {
		struct lttng_ht_iter iter;
		int ret;

		iter.iter.node = &stream->node.node;
		ret = lttng_ht_del(relay_streams_ht, &iter);
		assert(!ret);
		stream->in_stream_ht = false;
	}
	if (stream->published) {
		pthread_mutex_lock(&stream->trace->stream_list_lock);
		cds_list_del_rcu(&stream->stream_node);
		pthread_mutex_unlock(&stream->trace->stream_list_lock);
		stream->published = false;
	}
}

static void stream_destroy(struct relay_stream *stream)
{
	if (stream->indexes_ht) {
		lttng_ht_destroy(stream->indexes_ht);
	}
	if (stream->tfa) {
		tracefile_array_destroy(stream->tfa);
	}
	free(stream->path_name);
	free(stream->channel_name);
	free(stream);
}

static void stream_destroy_rcu(struct rcu_head *rcu_head)
{
	struct relay_stream *stream =
		caa_container_of(rcu_head, struct relay_stream, rcu_node);

	stream_destroy(stream);
}

/*
 * No need to take stream->lock since this is only called on the final
 * stream_put which ensures that a single thread may act on the stream.
 *
 * At that point, the object is also protected by the reflock which
 * guarantees that no other thread may share ownership of this stream.
 */
static void stream_release(struct urcu_ref *ref)
{
	struct relay_stream *stream =
		caa_container_of(ref, struct relay_stream, ref);
	struct relay_session *session;

	session = stream->trace->session;

	DBG("Releasing stream id %" PRIu64, stream->stream_handle);

	pthread_mutex_lock(&session->recv_list_lock);
	session->stream_count--;
	if (stream->in_recv_list) {
		cds_list_del_rcu(&stream->recv_node);
		stream->in_recv_list = false;
	}
	pthread_mutex_unlock(&session->recv_list_lock);

	stream_unpublish(stream);

	if (stream->stream_fd) {
		stream_fd_put(stream->stream_fd);
		stream->stream_fd = NULL;
	}
	if (stream->index_fd) {
		stream_fd_put(stream->index_fd);
		stream->index_fd = NULL;
	}
	if (stream->trace) {
		ctf_trace_put(stream->trace);
		stream->trace = NULL;
	}

	call_rcu(&stream->rcu_node, stream_destroy_rcu);
}

void stream_put(struct relay_stream *stream)
{
	DBG("stream put for stream id %" PRIu64, stream->stream_handle);
	/*
	 * Ensure existence of stream->reflock for stream unlock.
	 */
	rcu_read_lock();
	/*
	 * Stream reflock ensures that concurrent test and update of
	 * stream ref is atomic.
	 */
	pthread_mutex_lock(&stream->reflock);
	assert(stream->ref.refcount != 0);
	/*
	 * Wait until we have processed all the stream packets before
	 * actually putting our last stream reference.
	 */
	DBG("stream put stream id %" PRIu64 " refcount %d",
			stream->stream_handle,
			(int) stream->ref.refcount);
	urcu_ref_put(&stream->ref, stream_release);
	pthread_mutex_unlock(&stream->reflock);
	rcu_read_unlock();
}

void stream_close(struct relay_stream *stream)
{
	DBG("closing stream %" PRIu64, stream->stream_handle);
	pthread_mutex_lock(&stream->lock);
	stream_unpublish(stream);
	stream->closed = true;
	relay_index_close_all(stream);
	pthread_mutex_unlock(&stream->lock);
	stream_put(stream);
}

void print_relay_streams(void)
{
	struct lttng_ht_iter iter;
	struct relay_stream *stream;

	rcu_read_lock();
	cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
			node.node) {
		if (!stream_get(stream)) {
			continue;
		}
		DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64
				" session %" PRIu64,
				stream,
				stream->ref.refcount,
				stream->stream_handle,
				stream->trace->id,
				stream->trace->session->id);
		stream_put(stream);
	}
	rcu_read_unlock();
}
Commit	Line	Data
2a174661 DG	1	/*
	2	* Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
	3	* David Goulet <dgoulet@efficios.com>
9a78c92e	4	* 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
2a174661 DG	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License, version 2 only, as
	8	* published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along with
	16	* this program; if not, write to the Free Software Foundation, Inc., 51
	17	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*/
	19
	20	#define _GNU_SOURCE
	21	#include <common/common.h>
9a78c92e MD	22	#include <common/utils.h>
	23	#include <common/defaults.h>
	24	#include <urcu/rculist.h>
	25	#include <sys/stat.h>
2a174661	26
9a78c92e	27	#include "lttng-relayd.h"
2a174661 DG	28	#include "index.h"
	29	#include "stream.h"
	30	#include "viewer-stream.h"
	31
9a78c92e MD	32	/* Should be called with RCU read-side lock held. */
	33	bool stream_get(struct relay_stream *stream)
	34	{
	35	bool has_ref = false;
	36
	37	pthread_mutex_lock(&stream->reflock);
	38	if (stream->ref.refcount != 0) {
	39	has_ref = true;
	40	urcu_ref_get(&stream->ref);
	41	}
	42	pthread_mutex_unlock(&stream->reflock);
	43
	44	return has_ref;
	45	}
	46
2a174661	47	/*
9a78c92e MD	48	* Get stream from stream id from the streams hash table. Return stream
	49	* if found else NULL. A stream reference is taken when a stream is
	50	* returned. stream_put() must be called on that stream.
2a174661	51	*/
9a78c92e	52	struct relay_stream *stream_get_by_id(uint64_t stream_id)
2a174661 DG	53	{
	54	struct lttng_ht_node_u64 *node;
	55	struct lttng_ht_iter iter;
	56	struct relay_stream *stream = NULL;
	57
9a78c92e MD	58	rcu_read_lock();
9a78c92e MD	59	lttng_ht_lookup(relay_streams_ht, &stream_id, &iter);
2a174661	60	node = lttng_ht_iter_get_node_u64(&iter);
9a78c92e	61	if (!node) {
2a174661 DG	62	DBG("Relay stream %" PRIu64 " not found", stream_id);
	63	goto end;
	64	}
	65	stream = caa_container_of(node, struct relay_stream, node);
9a78c92e MD	66	if (!stream_get(stream)) {
	67	stream = NULL;
	68	}
2a174661	69	end:
9a78c92e	70	rcu_read_unlock();
2a174661 DG	71	return stream;
	72	}
	73
	74	/*
9a78c92e	75	* We keep ownership of path_name and channel_name.
2a174661	76	*/
9a78c92e MD	77	struct relay_stream stream_create(struct ctf_trace trace,
	78	uint64_t stream_handle, char *path_name,
	79	char *channel_name, uint64_t tracefile_size,
	80	uint64_t tracefile_count)
2a174661	81	{
9a78c92e MD	82	int ret;
	83	struct relay_stream *stream = NULL;
	84	struct relay_session *session = trace->session;
2a174661	85
9a78c92e MD	86	stream = zmalloc(sizeof(struct relay_stream));
	87	if (stream == NULL) {
	88	PERROR("relay stream zmalloc");
	89	ret = -1;
	90	goto error_no_alloc;
	91	}
2a174661	92
9a78c92e MD	93	stream->stream_handle = stream_handle;
	94	stream->prev_seq = -1ULL;
	95	stream->ctf_stream_id = -1ULL;
	96	stream->tracefile_size = tracefile_size;
	97	stream->tracefile_count = tracefile_count;
	98	stream->path_name = path_name;
	99	stream->channel_name = channel_name;
	100	lttng_ht_node_init_u64(&stream->node, stream->stream_handle);
	101	pthread_mutex_init(&stream->lock, NULL);
	102	pthread_mutex_init(&stream->reflock, NULL);
	103	urcu_ref_init(&stream->ref);
	104	ctf_trace_get(trace);
	105	stream->trace = trace;
2a174661	106
9a78c92e MD	107	stream->indexes_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
	108	if (!stream->indexes_ht) {
	109	ERR("Cannot created indexes_ht");
	110	ret = -1;
	111	goto end;
2a174661 DG	112	}
2a174661 DG	113
9a78c92e MD	114	ret = utils_mkdir_recursive(stream->path_name, S_IRWXU \| S_IRWXG,
	115	-1, -1);
	116	if (ret < 0) {
	117	ERR("relay creating output directory");
	118	goto end;
	119	}
2a174661	120
9a78c92e MD	121	/*
	122	* No need to use run_as API here because whatever we receive,
	123	* the relayd uses its own credentials for the stream files.
	124	*/
	125	ret = utils_create_stream_file(stream->path_name, stream->channel_name,
	126	stream->tracefile_size, 0, -1, -1, NULL);
	127	if (ret < 0) {
	128	ERR("Create output file");
	129	goto end;
	130	}
	131	stream->stream_fd = stream_fd_create(ret);
	132	if (!stream->stream_fd) {
	133	if (close(ret)) {
	134	PERROR("Error closing file %d", ret);
2a174661	135	}
9a78c92e MD	136	ret = -1;
9a78c92e MD	137	goto end;
2a174661	138	}
c00978f1 MD	139	stream->tfa = tracefile_array_create(stream->tracefile_count);
	140	if (!stream->tfa) {
	141	ret = -1;
	142	goto end;
	143	}
9a78c92e MD	144	if (stream->tracefile_size) {
	145	DBG("Tracefile %s/%s_0 created", stream->path_name, stream->channel_name);
	146	} else {
	147	DBG("Tracefile %s/%s created", stream->path_name, stream->channel_name);
	148	}
	149
	150	if (!strncmp(stream->channel_name, DEFAULT_METADATA_NAME, NAME_MAX)) {
	151	stream->is_metadata = 1;
	152	}
	153
	154	stream->in_recv_list = true;
	155
	156	/*
	157	* Add the stream in the recv list of the session. Once the end stream
	158	* message is received, all session streams are published.
	159	*/
	160	pthread_mutex_lock(&session->recv_list_lock);
	161	cds_list_add_rcu(&stream->recv_node, &session->recv_list);
	162	session->stream_count++;
	163	pthread_mutex_unlock(&session->recv_list_lock);
	164
	165	/*
	166	* Both in the ctf_trace object and the global stream ht since the data
	167	* side of the relayd does not have the concept of session.
	168	*/
	169	lttng_ht_add_unique_u64(relay_streams_ht, &stream->node);
ffc70591	170	stream->in_stream_ht = true;
2a174661	171
9a78c92e MD	172	DBG("Relay new stream added %s with ID %" PRIu64, stream->channel_name,
	173	stream->stream_handle);
	174	ret = 0;
	175
	176	end:
	177	if (ret) {
	178	if (stream->stream_fd) {
	179	stream_fd_put(stream->stream_fd);
	180	stream->stream_fd = NULL;
2a174661	181	}
9a78c92e MD	182	stream_put(stream);
9a78c92e MD	183	stream = NULL;
2a174661	184	}
9a78c92e	185	return stream;
2a174661	186
9a78c92e MD	187	error_no_alloc:
	188	/*
	189	* path_name and channel_name need to be freed explicitly here
	190	* because we cannot rely on stream_put().
	191	*/
	192	free(path_name);
	193	free(channel_name);
	194	return NULL;
	195	}
	196
	197	/*
	198	* Called with the session lock held.
	199	*/
	200	void stream_publish(struct relay_stream *stream)
	201	{
	202	struct relay_session *session;
	203
	204	pthread_mutex_lock(&stream->lock);
	205	if (stream->published) {
	206	goto unlock;
2a174661 DG	207	}
2a174661 DG	208
9a78c92e	209	session = stream->trace->session;
2a174661	210
9a78c92e MD	211	pthread_mutex_lock(&session->recv_list_lock);
	212	if (stream->in_recv_list) {
	213	cds_list_del_rcu(&stream->recv_node);
	214	stream->in_recv_list = false;
	215	}
	216	pthread_mutex_unlock(&session->recv_list_lock);
2a174661	217
9a78c92e MD	218	pthread_mutex_lock(&stream->trace->stream_list_lock);
	219	cds_list_add_rcu(&stream->stream_node, &stream->trace->stream_list);
	220	pthread_mutex_unlock(&stream->trace->stream_list_lock);
2a174661	221
9a78c92e MD	222	stream->published = true;
9a78c92e MD	223	unlock:
2a174661	224	pthread_mutex_unlock(&stream->lock);
2a174661 DG	225	}
2a174661 DG	226
9a78c92e	227	/*
ffc70591 MD	228	* Stream must be protected by holding the stream lock or by virtue of being
	229	* called from stream_destroy, in which case it is guaranteed to be accessed
	230	* from a single thread by the reflock.
9a78c92e MD	231	*/
9a78c92e MD	232	static void stream_unpublish(struct relay_stream *stream)
2a174661	233	{
ffc70591 MD	234	if (stream->in_stream_ht) {
	235	struct lttng_ht_iter iter;
	236	int ret;
	237
	238	iter.iter.node = &stream->node.node;
	239	ret = lttng_ht_del(relay_streams_ht, &iter);
	240	assert(!ret);
	241	stream->in_stream_ht = false;
	242	}
	243	if (stream->published) {
	244	pthread_mutex_lock(&stream->trace->stream_list_lock);
	245	cds_list_del_rcu(&stream->stream_node);
	246	pthread_mutex_unlock(&stream->trace->stream_list_lock);
	247	stream->published = false;
9a78c92e	248	}
9a78c92e MD	249	}
	250
	251	static void stream_destroy(struct relay_stream *stream)
	252	{
	253	if (stream->indexes_ht) {
	254	lttng_ht_destroy(stream->indexes_ht);
	255	}
c00978f1 MD	256	if (stream->tfa) {
	257	tracefile_array_destroy(stream->tfa);
	258	}
9a78c92e MD	259	free(stream->path_name);
	260	free(stream->channel_name);
	261	free(stream);
	262	}
	263
	264	static void stream_destroy_rcu(struct rcu_head *rcu_head)
	265	{
	266	struct relay_stream *stream =
	267	caa_container_of(rcu_head, struct relay_stream, rcu_node);
	268
	269	stream_destroy(stream);
	270	}
	271
	272	/*
	273	* No need to take stream->lock since this is only called on the final
	274	* stream_put which ensures that a single thread may act on the stream.
	275	*
	276	* At that point, the object is also protected by the reflock which
	277	* guarantees that no other thread may share ownership of this stream.
	278	*/
	279	static void stream_release(struct urcu_ref *ref)
	280	{
	281	struct relay_stream *stream =
	282	caa_container_of(ref, struct relay_stream, ref);
	283	struct relay_session *session;
2a174661	284
9a78c92e MD	285	session = stream->trace->session;
	286
	287	DBG("Releasing stream id %" PRIu64, stream->stream_handle);
	288
	289	pthread_mutex_lock(&session->recv_list_lock);
	290	session->stream_count--;
	291	if (stream->in_recv_list) {
	292	cds_list_del_rcu(&stream->recv_node);
	293	stream->in_recv_list = false;
	294	}
	295	pthread_mutex_unlock(&session->recv_list_lock);
2a174661	296
9a78c92e MD	297	stream_unpublish(stream);
	298
	299	if (stream->stream_fd) {
	300	stream_fd_put(stream->stream_fd);
	301	stream->stream_fd = NULL;
	302	}
	303	if (stream->index_fd) {
	304	stream_fd_put(stream->index_fd);
	305	stream->index_fd = NULL;
	306	}
	307	if (stream->trace) {
	308	ctf_trace_put(stream->trace);
	309	stream->trace = NULL;
	310	}
	311
	312	call_rcu(&stream->rcu_node, stream_destroy_rcu);
2a174661 DG	313	}
2a174661 DG	314
9a78c92e	315	void stream_put(struct relay_stream *stream)
2a174661	316	{
9a78c92e MD	317	DBG("stream put for stream id %" PRIu64, stream->stream_handle);
	318	/*
	319	* Ensure existence of stream->reflock for stream unlock.
	320	*/
	321	rcu_read_lock();
	322	/*
	323	* Stream reflock ensures that concurrent test and update of
	324	* stream ref is atomic.
	325	*/
	326	pthread_mutex_lock(&stream->reflock);
	327	assert(stream->ref.refcount != 0);
	328	/*
	329	* Wait until we have processed all the stream packets before
	330	* actually putting our last stream reference.
	331	*/
	332	DBG("stream put stream id %" PRIu64 " refcount %d",
	333	stream->stream_handle,
	334	(int) stream->ref.refcount);
	335	urcu_ref_put(&stream->ref, stream_release);
	336	pthread_mutex_unlock(&stream->reflock);
	337	rcu_read_unlock();
	338	}
	339
	340	void stream_close(struct relay_stream *stream)
	341	{
	342	DBG("closing stream %" PRIu64, stream->stream_handle);
	343	pthread_mutex_lock(&stream->lock);
ffc70591	344	stream_unpublish(stream);
64bda0b4	345	stream->closed = true;
9a78c92e MD	346	relay_index_close_all(stream);
	347	pthread_mutex_unlock(&stream->lock);
	348	stream_put(stream);
	349	}
	350
	351	void print_relay_streams(void)
	352	{
	353	struct lttng_ht_iter iter;
	354	struct relay_stream *stream;
	355
	356	rcu_read_lock();
	357	cds_lfht_for_each_entry(relay_streams_ht->ht, &iter.iter, stream,
	358	node.node) {
	359	if (!stream_get(stream)) {
	360	continue;
	361	}
	362	DBG("stream %p refcount %ld stream %" PRIu64 " trace %" PRIu64
	363	" session %" PRIu64,
	364	stream,
	365	stream->ref.refcount,
	366	stream->stream_handle,
	367	stream->trace->id,
	368	stream->trace->session->id);
	369	stream_put(stream);
	370	}
	371	rcu_read_unlock();
2a174661	372	}