[lttng-tools.git] / ltt-sessiond / trace.c

/*
 * Copyright (C)  2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; only version 2
 * of the License.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <lttngerr.h>

#include "trace.h"

/*
 * Find the channel name for the given kernel session.
 */
struct ltt_kernel_channel *get_kernel_channel_by_name(
		char *name, struct ltt_kernel_session *session)
{
	struct ltt_kernel_channel *chan;

	if (session == NULL) {
		ERR("Undefine session");
		goto error;
	}

	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
		if (strcmp(name, chan->channel->name) == 0) {
			DBG("Found channel by name %s", name);
			return chan;
		}
	}

error:
	return NULL;
}

/*
 * Find the event name for the given channel.
 */
struct ltt_kernel_event *get_kernel_event_by_name(
		char *name, struct ltt_kernel_channel *channel)
{
	struct ltt_kernel_event *ev;

	if (channel == NULL) {
		ERR("Undefine channel");
		goto error;
	}

	cds_list_for_each_entry(ev, &channel->events_list.head, list) {
		if (strcmp(name, ev->event->name) == 0) {
			DBG("Found event by name %s for channel %s", name,
					channel->channel->name);
			return ev;
		}
	}

error:
	return NULL;
}

/*
 * Allocate and initialize a kernel session data structure.
 *
 * Return pointer to structure or NULL.
 */
struct ltt_kernel_session *trace_create_kernel_session(void)
{
	struct ltt_kernel_session *lks;

	/* Allocate a new ltt kernel session */
	lks = malloc(sizeof(struct ltt_kernel_session));
	if (lks == NULL) {
		perror("create kernel session malloc");
		goto error;
	}

	/* Init data structure */
	lks->fd = 0;
	lks->metadata_stream_fd = 0;
	lks->channel_count = 0;
	lks->stream_count_global = 0;
	lks->metadata = NULL;
	lks->consumer_fd = 0;
	CDS_INIT_LIST_HEAD(&lks->channel_list.head);

	return lks;

error:
	return NULL;
}

/*
 * Allocate and initialize a kernel channel data structure.
 *
 * Return pointer to structure or NULL.
 */
struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan, char *path)
{
	int ret;
	struct ltt_kernel_channel *lkc;

	lkc = malloc(sizeof(struct ltt_kernel_channel));
	if (lkc == NULL) {
		perror("ltt_kernel_channel malloc");
		goto error;
	}

	lkc->channel = malloc(sizeof(struct lttng_channel));
	if (lkc->channel == NULL) {
		perror("lttng_channel malloc");
		goto error;
	}
	memcpy(lkc->channel, chan, sizeof(struct lttng_channel));

	lkc->fd = 0;
	lkc->stream_count = 0;
	lkc->event_count = 0;
	lkc->enabled = 1;
	lkc->ctx = NULL;
	/* Init linked list */
	CDS_INIT_LIST_HEAD(&lkc->events_list.head);
	CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
	/* Set default trace output path */
	ret = asprintf(&lkc->pathname, "%s", path);
	if (ret < 0) {
		perror("asprintf kernel create channel");
		goto error;
	}

	return lkc;

error:
	return NULL;
}

/*
 * Allocate and initialize a kernel event. Set name and event type.
 *
 * Return pointer to structure or NULL.
 */
struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev)
{
	struct ltt_kernel_event *lke;
	struct lttng_kernel_event *attr;

	lke = malloc(sizeof(struct ltt_kernel_event));
	attr = malloc(sizeof(struct lttng_kernel_event));
	if (lke == NULL || attr == NULL) {
		perror("kernel event malloc");
		goto error;
	}

	switch (ev->type) {
	case LTTNG_EVENT_PROBE:
		attr->instrumentation = LTTNG_KERNEL_KPROBE;
		attr->u.kprobe.addr = ev->attr.probe.addr;
		attr->u.kprobe.offset = ev->attr.probe.offset;
		strncpy(attr->u.kprobe.symbol_name,
				ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
		attr->u.kprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
		break;
	case LTTNG_EVENT_FUNCTION:
		attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
		attr->u.kretprobe.addr = ev->attr.probe.addr;
		attr->u.kretprobe.offset = ev->attr.probe.offset;
		attr->u.kretprobe.offset = ev->attr.probe.offset;
		strncpy(attr->u.kretprobe.symbol_name,
				ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
		attr->u.kretprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
		break;
	case LTTNG_EVENT_FUNCTION_ENTRY:
		attr->instrumentation = LTTNG_KERNEL_FUNCTION;
		strncpy(attr->u.ftrace.symbol_name,
				ev->attr.ftrace.symbol_name, LTTNG_SYM_NAME_LEN);
		attr->u.ftrace.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
		break;
	case LTTNG_EVENT_TRACEPOINT:
		attr->instrumentation = LTTNG_KERNEL_TRACEPOINT;
		break;
	default:
		ERR("Unknown kernel instrumentation type (%d)", ev->type);
		goto error;
	}

	/* Copy event name */
	strncpy(attr->name, ev->name, LTTNG_SYM_NAME_LEN);
	attr->name[LTTNG_SYM_NAME_LEN - 1] = '\0';

	/* Setting up a kernel event */
	lke->fd = 0;
	lke->event = attr;
	lke->enabled = 1;
	lke->ctx = NULL;

	return lke;

error:
	return NULL;
}

/*
 * Allocate and initialize a kernel metadata.
 *
 * Return pointer to structure or NULL.
 */
struct ltt_kernel_metadata *trace_create_kernel_metadata(char *path)
{
	int ret;
	struct ltt_kernel_metadata *lkm;
	struct lttng_channel *chan;

	lkm = malloc(sizeof(struct ltt_kernel_metadata));
	chan = malloc(sizeof(struct lttng_channel));
	if (lkm == NULL || chan == NULL) {
		perror("kernel metadata malloc");
		goto error;
	}

	/* Set default attributes */
	chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
	chan->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
	chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
	chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
	chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
	chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;

	/* Init metadata */
	lkm->fd = 0;
	lkm->conf = chan;
	/* Set default metadata path */
	ret = asprintf(&lkm->pathname, "%s/metadata", path);
	if (ret < 0) {
		perror("asprintf kernel metadata");
		goto error;
	}

	return lkm;

error:
	return NULL;
}

/*
 * Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by
 * default.
 *
 * Return pointer to structure or NULL.
 */
struct ltt_kernel_stream *trace_create_kernel_stream(void)
{
	struct ltt_kernel_stream *lks;

	lks = malloc(sizeof(struct ltt_kernel_stream));
	if (lks == NULL) {
		perror("kernel stream malloc");
		goto error;
	}

	/* Init stream */
	lks->fd = 0;
	lks->pathname = NULL;
	lks->state = 0;

	return lks;

error:
	return NULL;
}

/*
 * Cleanup kernel stream structure.
 */
void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream)
{
	DBG("[trace] Closing stream fd %d", stream->fd);
	/* Close kernel fd */
	close(stream->fd);
	free(stream->pathname);

	/* Remove from stream list */
	cds_list_del(&stream->list);
	free(stream);
}

/*
 * Cleanup kernel event structure.
 */
void trace_destroy_kernel_event(struct ltt_kernel_event *event)
{
	DBG("[trace] Closing event fd %d", event->fd);
	/* Close kernel fd */
	close(event->fd);
	/* Free attributes */
	free(event->event);

	/* Remove from event list */
	cds_list_del(&event->list);
	free(event);
}

/*
 * Cleanup kernel channel structure.
 */
void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel)
{
	struct ltt_kernel_stream *stream, *stmp;
	struct ltt_kernel_event *event, *etmp;

	DBG("[trace] Closing channel fd %d", channel->fd);
	/* Close kernel fd */
	close(channel->fd);
	free(channel->pathname);
	/* Free attributes structure */
	free(channel->channel);

	/* For each stream in the channel list */
	cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) {
		trace_destroy_kernel_stream(stream);
	}

	/* For each event in the channel list */
	cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) {
		trace_destroy_kernel_event(event);
	}

	/* Remove from channel list */
	cds_list_del(&channel->list);
	free(channel);
}

/*
 * Cleanup kernel metadata structure.
 */
void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata)
{
	DBG("[trace] Closing metadata fd %d", metadata->fd);
	/* Close kernel fd */
	close(metadata->fd);
	/* Free attributes */
	free(metadata->conf);

	free(metadata);
}

/*
 * Cleanup kernel session structure 
 */
void trace_destroy_kernel_session(struct ltt_kernel_session *session)
{
	struct ltt_kernel_channel *channel, *ctmp;

	DBG("[trace] Closing session fd %d", session->fd);
	/* Close kernel fds */
	close(session->fd);
	if (session->metadata_stream_fd != 0) {
		DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
		close(session->metadata_stream_fd);
	}

	if (session->metadata != NULL) {
		trace_destroy_kernel_metadata(session->metadata);
	}

	cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) {
		trace_destroy_kernel_channel(channel);
	}

	free(session);
}
Commit	Line	Data
54012638 DG	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
82a3637f DG	6	* as published by the Free Software Foundation; only version 2
82a3637f DG	7	* of the License.
54012638 DG	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*/
	18
	19	#define _GNU_SOURCE
	20	#include <stdio.h>
	21	#include <stdlib.h>
	22	#include <string.h>
c363b55d	23	#include <unistd.h>
54012638	24
1e307fab DG	25	#include <lttngerr.h>
1e307fab DG	26
54012638 DG	27	#include "trace.h"
54012638 DG	28
19e70852	29	/*
050349bb	30	* Find the channel name for the given kernel session.
19e70852 DG	31	*/
	32	struct ltt_kernel_channel *get_kernel_channel_by_name(
	33	char name, struct ltt_kernel_session session)
	34	{
	35	struct ltt_kernel_channel *chan;
	36
	37	if (session == NULL) {
	38	ERR("Undefine session");
	39	goto error;
	40	}
	41
	42	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
	43	if (strcmp(name, chan->channel->name) == 0) {
	44	DBG("Found channel by name %s", name);
	45	return chan;
	46	}
	47	}
	48
	49	error:
	50	return NULL;
	51	}
	52
	53	/*
050349bb	54	* Find the event name for the given channel.
19e70852 DG	55	*/
	56	struct ltt_kernel_event *get_kernel_event_by_name(
	57	char name, struct ltt_kernel_channel channel)
	58	{
	59	struct ltt_kernel_event *ev;
	60
	61	if (channel == NULL) {
	62	ERR("Undefine channel");
	63	goto error;
	64	}
	65
	66	cds_list_for_each_entry(ev, &channel->events_list.head, list) {
	67	if (strcmp(name, ev->event->name) == 0) {
	68	DBG("Found event by name %s for channel %s", name,
	69	channel->channel->name);
	70	return ev;
	71	}
	72	}
	73
	74	error:
	75	return NULL;
	76	}
	77
54012638	78	/*
050349bb	79	* Allocate and initialize a kernel session data structure.
54012638	80	*
050349bb	81	* Return pointer to structure or NULL.
54012638 DG	82	*/
	83	struct ltt_kernel_session *trace_create_kernel_session(void)
	84	{
	85	struct ltt_kernel_session *lks;
	86
	87	/* Allocate a new ltt kernel session */
	88	lks = malloc(sizeof(struct ltt_kernel_session));
	89	if (lks == NULL) {
	90	perror("create kernel session malloc");
	91	goto error;
	92	}
	93
	94	/* Init data structure */
	95	lks->fd = 0;
	96	lks->metadata_stream_fd = 0;
	97	lks->channel_count = 0;
	98	lks->stream_count_global = 0;
	99	lks->metadata = NULL;
d9800920	100	lks->consumer_fd = 0;
54012638 DG	101	CDS_INIT_LIST_HEAD(&lks->channel_list.head);
	102
	103	return lks;
	104
	105	error:
	106	return NULL;
	107	}
	108
	109	/*
050349bb	110	* Allocate and initialize a kernel channel data structure.
54012638	111	*
050349bb	112	* Return pointer to structure or NULL.
54012638	113	*/
b082db07	114	struct ltt_kernel_channel trace_create_kernel_channel(struct lttng_channel chan, char *path)
54012638 DG	115	{
	116	int ret;
	117	struct ltt_kernel_channel *lkc;
54012638 DG	118
54012638 DG	119	lkc = malloc(sizeof(struct ltt_kernel_channel));
f3ed775e DG	120	if (lkc == NULL) {
f3ed775e DG	121	perror("ltt_kernel_channel malloc");
54012638 DG	122	goto error;
	123	}
	124
f3ed775e DG	125	lkc->channel = malloc(sizeof(struct lttng_channel));
	126	if (lkc->channel == NULL) {
	127	perror("lttng_channel malloc");
	128	goto error;
	129	}
	130	memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
54012638 DG	131
	132	lkc->fd = 0;
	133	lkc->stream_count = 0;
cbbbb275	134	lkc->event_count = 0;
d36b8583	135	lkc->enabled = 1;
e75cda3a	136	lkc->ctx = NULL;
54012638 DG	137	/* Init linked list */
	138	CDS_INIT_LIST_HEAD(&lkc->events_list.head);
	139	CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
	140	/* Set default trace output path */
b082db07	141	ret = asprintf(&lkc->pathname, "%s", path);
54012638 DG	142	if (ret < 0) {
	143	perror("asprintf kernel create channel");
	144	goto error;
	145	}
	146
	147	return lkc;
	148
	149	error:
	150	return NULL;
	151	}
	152
	153	/*
050349bb	154	* Allocate and initialize a kernel event. Set name and event type.
54012638	155	*
050349bb	156	* Return pointer to structure or NULL.
54012638	157	*/
f3ed775e	158	struct ltt_kernel_event trace_create_kernel_event(struct lttng_event ev)
54012638 DG	159	{
	160	struct ltt_kernel_event *lke;
	161	struct lttng_kernel_event *attr;
	162
	163	lke = malloc(sizeof(struct ltt_kernel_event));
	164	attr = malloc(sizeof(struct lttng_kernel_event));
	165	if (lke == NULL \|\| attr == NULL) {
	166	perror("kernel event malloc");
	167	goto error;
	168	}
	169
f3ed775e	170	switch (ev->type) {
7d29a247	171	case LTTNG_EVENT_PROBE:
e6ddca71	172	attr->instrumentation = LTTNG_KERNEL_KPROBE;
7d29a247 DG	173	attr->u.kprobe.addr = ev->attr.probe.addr;
7d29a247 DG	174	attr->u.kprobe.offset = ev->attr.probe.offset;
f3ed775e	175	strncpy(attr->u.kprobe.symbol_name,
7d29a247	176	ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	177	attr->u.kprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e DG	178	break;
f3ed775e DG	179	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	180	attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
	181	attr->u.kretprobe.addr = ev->attr.probe.addr;
	182	attr->u.kretprobe.offset = ev->attr.probe.offset;
	183	attr->u.kretprobe.offset = ev->attr.probe.offset;
	184	strncpy(attr->u.kretprobe.symbol_name,
	185	ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	186	attr->u.kretprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
8f0d098b MD	187	break;
8f0d098b MD	188	case LTTNG_EVENT_FUNCTION_ENTRY:
f3ed775e DG	189	attr->instrumentation = LTTNG_KERNEL_FUNCTION;
	190	strncpy(attr->u.ftrace.symbol_name,
	191	ev->attr.ftrace.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	192	attr->u.ftrace.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e	193	break;
e6ddca71 DG	194	case LTTNG_EVENT_TRACEPOINT:
e6ddca71 DG	195	attr->instrumentation = LTTNG_KERNEL_TRACEPOINT;
f3ed775e DG	196	break;
	197	default:
	198	ERR("Unknown kernel instrumentation type (%d)", ev->type);
	199	goto error;
	200	}
	201
	202	/* Copy event name */
	203	strncpy(attr->name, ev->name, LTTNG_SYM_NAME_LEN);
99497cd0	204	attr->name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e	205
54012638 DG	206	/* Setting up a kernel event */
	207	lke->fd = 0;
	208	lke->event = attr;
d36b8583	209	lke->enabled = 1;
e75cda3a	210	lke->ctx = NULL;
54012638 DG	211
	212	return lke;
	213
	214	error:
	215	return NULL;
	216	}
	217
	218	/*
050349bb	219	* Allocate and initialize a kernel metadata.
54012638	220	*
050349bb	221	* Return pointer to structure or NULL.
54012638	222	*/
58a97671	223	struct ltt_kernel_metadata trace_create_kernel_metadata(char path)
54012638 DG	224	{
	225	int ret;
	226	struct ltt_kernel_metadata *lkm;
f3ed775e	227	struct lttng_channel *chan;
54012638 DG	228
54012638 DG	229	lkm = malloc(sizeof(struct ltt_kernel_metadata));
f3ed775e DG	230	chan = malloc(sizeof(struct lttng_channel));
f3ed775e DG	231	if (lkm == NULL \|\| chan == NULL) {
54012638 DG	232	perror("kernel metadata malloc");
	233	goto error;
	234	}
	235
	236	/* Set default attributes */
f3ed775e	237	chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
b389abbe MD	238	chan->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
b389abbe MD	239	chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
f3ed775e DG	240	chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
f3ed775e DG	241	chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
7d452e12	242	chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
54012638 DG	243
	244	/* Init metadata */
	245	lkm->fd = 0;
f3ed775e	246	lkm->conf = chan;
54012638	247	/* Set default metadata path */
58a97671	248	ret = asprintf(&lkm->pathname, "%s/metadata", path);
54012638 DG	249	if (ret < 0) {
	250	perror("asprintf kernel metadata");
	251	goto error;
	252	}
	253
	254	return lkm;
	255
	256	error:
	257	return NULL;
	258	}
	259
	260	/*
050349bb DG	261	* Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by
050349bb DG	262	* default.
54012638	263	*
050349bb	264	* Return pointer to structure or NULL.
54012638 DG	265	*/
	266	struct ltt_kernel_stream *trace_create_kernel_stream(void)
	267	{
	268	struct ltt_kernel_stream *lks;
	269
	270	lks = malloc(sizeof(struct ltt_kernel_stream));
	271	if (lks == NULL) {
	272	perror("kernel stream malloc");
	273	goto error;
	274	}
	275
	276	/* Init stream */
	277	lks->fd = 0;
	278	lks->pathname = NULL;
	279	lks->state = 0;
	280
	281	return lks;
	282
	283	error:
	284	return NULL;
	285	}
c363b55d	286
050349bb DG	287	/*
	288	* Cleanup kernel stream structure.
	289	*/
c363b55d DG	290	void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream)
c363b55d DG	291	{
33a2b854	292	DBG("[trace] Closing stream fd %d", stream->fd);
c363b55d DG	293	/* Close kernel fd */
	294	close(stream->fd);
	295	free(stream->pathname);
	296
	297	/* Remove from stream list */
	298	cds_list_del(&stream->list);
	299	free(stream);
	300	}
	301
050349bb DG	302	/*
	303	* Cleanup kernel event structure.
	304	*/
c363b55d DG	305	void trace_destroy_kernel_event(struct ltt_kernel_event *event)
c363b55d DG	306	{
33a2b854	307	DBG("[trace] Closing event fd %d", event->fd);
c363b55d DG	308	/* Close kernel fd */
	309	close(event->fd);
	310	/* Free attributes */
	311	free(event->event);
	312
	313	/* Remove from event list */
	314	cds_list_del(&event->list);
	315	free(event);
	316	}
	317
050349bb DG	318	/*
	319	* Cleanup kernel channel structure.
	320	*/
c363b55d DG	321	void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel)
c363b55d DG	322	{
af9737e9 DG	323	struct ltt_kernel_stream stream, stmp;
af9737e9 DG	324	struct ltt_kernel_event event, etmp;
c363b55d	325
33a2b854	326	DBG("[trace] Closing channel fd %d", channel->fd);
c363b55d DG	327	/* Close kernel fd */
	328	close(channel->fd);
	329	free(channel->pathname);
	330	/* Free attributes structure */
	331	free(channel->channel);
	332
	333	/* For each stream in the channel list */
af9737e9	334	cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) {
c363b55d DG	335	trace_destroy_kernel_stream(stream);
	336	}
	337
	338	/* For each event in the channel list */
af9737e9	339	cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) {
c363b55d DG	340	trace_destroy_kernel_event(event);
	341	}
	342
	343	/* Remove from channel list */
	344	cds_list_del(&channel->list);
	345	free(channel);
	346	}
	347
050349bb DG	348	/*
	349	* Cleanup kernel metadata structure.
	350	*/
c363b55d DG	351	void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata)
c363b55d DG	352	{
33a2b854	353	DBG("[trace] Closing metadata fd %d", metadata->fd);
c363b55d DG	354	/* Close kernel fd */
	355	close(metadata->fd);
	356	/* Free attributes */
	357	free(metadata->conf);
	358
	359	free(metadata);
	360	}
	361
050349bb DG	362	/*
	363	* Cleanup kernel session structure
	364	*/
c363b55d DG	365	void trace_destroy_kernel_session(struct ltt_kernel_session *session)
c363b55d DG	366	{
af9737e9	367	struct ltt_kernel_channel channel, ctmp;
c363b55d	368
33a2b854	369	DBG("[trace] Closing session fd %d", session->fd);
c363b55d DG	370	/* Close kernel fds */
c363b55d DG	371	close(session->fd);
70dc1c34 DG	372	if (session->metadata_stream_fd != 0) {
	373	DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
	374	close(session->metadata_stream_fd);
	375	}
c363b55d	376
d36b8583 DG	377	if (session->metadata != NULL) {
	378	trace_destroy_kernel_metadata(session->metadata);
	379	}
c363b55d	380
af9737e9	381	cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) {
c363b55d DG	382	trace_destroy_kernel_channel(channel);
	383	}
	384
	385	free(session);
	386	}