[lttng-tools.git] / ltt-sessiond / trace-kernel.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-kernel.h"

/*
 * Find the channel name for the given kernel session.
 */
struct ltt_kernel_channel *trace_kernel_get_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 *trace_kernel_get_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_kernel_create_session(char *path)
{
	int ret;
	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);

	/* Set session path */
	ret = asprintf(&lks->trace_path, "%s/kernel", path);
	if (ret < 0) {
		perror("asprintf kernel traces path");
		goto error;
	}

	return lks;

error:
	return NULL;
}

/*
 * Allocate and initialize a kernel channel data structure.
 *
 * Return pointer to structure or NULL.
 */
struct ltt_kernel_channel *trace_kernel_create_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_kernel_create_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_kernel_create_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_kernel_create_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_kernel_destroy_stream(struct ltt_kernel_stream *stream)
{
	DBG("[trace] Closing stream fd %d", stream->fd);
	/* Close kernel fd */
	close(stream->fd);
	/* Remove from stream list */
	cds_list_del(&stream->list);

	free(stream->pathname);
	free(stream);
}

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

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

	free(event->event);
	free(event->ctx);
	free(event);
}

/*
 * Cleanup kernel channel structure.
 */
void trace_kernel_destroy_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);

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

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

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

	free(channel->pathname);
	free(channel->channel);
	free(channel->ctx);
	free(channel);
}

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

	free(metadata->conf);
	free(metadata->pathname);
	free(metadata);
}

/*
 * Cleanup kernel session structure
 */
void trace_kernel_destroy_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_kernel_destroy_metadata(session->metadata);
	}

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

	free(session->trace_path);
	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
62499ad6	27	#include "trace-kernel.h"
54012638	28
19e70852	29	/*
050349bb	30	* Find the channel name for the given kernel session.
19e70852	31	*/
62499ad6	32	struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
19e70852 DG	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	55	*/
62499ad6	56	struct ltt_kernel_event *trace_kernel_get_event_by_name(
19e70852 DG	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	82	*/
f9815039	83	struct ltt_kernel_session trace_kernel_create_session(char path)
54012638	84	{
f9815039	85	int ret;
54012638 DG	86	struct ltt_kernel_session *lks;
	87
	88	/* Allocate a new ltt kernel session */
	89	lks = malloc(sizeof(struct ltt_kernel_session));
	90	if (lks == NULL) {
	91	perror("create kernel session malloc");
	92	goto error;
	93	}
	94
	95	/* Init data structure */
	96	lks->fd = 0;
	97	lks->metadata_stream_fd = 0;
	98	lks->channel_count = 0;
	99	lks->stream_count_global = 0;
	100	lks->metadata = NULL;
d9800920	101	lks->consumer_fd = 0;
54012638 DG	102	CDS_INIT_LIST_HEAD(&lks->channel_list.head);
54012638 DG	103
f9815039 DG	104	/* Set session path */
	105	ret = asprintf(&lks->trace_path, "%s/kernel", path);
	106	if (ret < 0) {
	107	perror("asprintf kernel traces path");
	108	goto error;
	109	}
	110
54012638 DG	111	return lks;
	112
	113	error:
	114	return NULL;
	115	}
	116
	117	/*
050349bb	118	* Allocate and initialize a kernel channel data structure.
54012638	119	*
050349bb	120	* Return pointer to structure or NULL.
54012638	121	*/
62499ad6	122	struct ltt_kernel_channel trace_kernel_create_channel(struct lttng_channel chan, char *path)
54012638 DG	123	{
	124	int ret;
	125	struct ltt_kernel_channel *lkc;
54012638 DG	126
54012638 DG	127	lkc = malloc(sizeof(struct ltt_kernel_channel));
f3ed775e DG	128	if (lkc == NULL) {
f3ed775e DG	129	perror("ltt_kernel_channel malloc");
54012638 DG	130	goto error;
	131	}
	132
f3ed775e DG	133	lkc->channel = malloc(sizeof(struct lttng_channel));
	134	if (lkc->channel == NULL) {
	135	perror("lttng_channel malloc");
	136	goto error;
	137	}
	138	memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
54012638 DG	139
	140	lkc->fd = 0;
	141	lkc->stream_count = 0;
cbbbb275	142	lkc->event_count = 0;
d36b8583	143	lkc->enabled = 1;
e75cda3a	144	lkc->ctx = NULL;
54012638 DG	145	/* Init linked list */
	146	CDS_INIT_LIST_HEAD(&lkc->events_list.head);
	147	CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
	148	/* Set default trace output path */
b082db07	149	ret = asprintf(&lkc->pathname, "%s", path);
54012638 DG	150	if (ret < 0) {
	151	perror("asprintf kernel create channel");
	152	goto error;
	153	}
	154
	155	return lkc;
	156
	157	error:
	158	return NULL;
	159	}
	160
	161	/*
050349bb	162	* Allocate and initialize a kernel event. Set name and event type.
54012638	163	*
050349bb	164	* Return pointer to structure or NULL.
54012638	165	*/
62499ad6	166	struct ltt_kernel_event trace_kernel_create_event(struct lttng_event ev)
54012638 DG	167	{
	168	struct ltt_kernel_event *lke;
	169	struct lttng_kernel_event *attr;
	170
	171	lke = malloc(sizeof(struct ltt_kernel_event));
	172	attr = malloc(sizeof(struct lttng_kernel_event));
	173	if (lke == NULL \|\| attr == NULL) {
	174	perror("kernel event malloc");
	175	goto error;
	176	}
	177
f3ed775e	178	switch (ev->type) {
7d29a247	179	case LTTNG_EVENT_PROBE:
e6ddca71	180	attr->instrumentation = LTTNG_KERNEL_KPROBE;
7d29a247 DG	181	attr->u.kprobe.addr = ev->attr.probe.addr;
7d29a247 DG	182	attr->u.kprobe.offset = ev->attr.probe.offset;
f3ed775e	183	strncpy(attr->u.kprobe.symbol_name,
7d29a247	184	ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	185	attr->u.kprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e DG	186	break;
f3ed775e DG	187	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	188	attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
	189	attr->u.kretprobe.addr = ev->attr.probe.addr;
	190	attr->u.kretprobe.offset = ev->attr.probe.offset;
	191	attr->u.kretprobe.offset = ev->attr.probe.offset;
	192	strncpy(attr->u.kretprobe.symbol_name,
	193	ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	194	attr->u.kretprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
8f0d098b MD	195	break;
8f0d098b MD	196	case LTTNG_EVENT_FUNCTION_ENTRY:
f3ed775e DG	197	attr->instrumentation = LTTNG_KERNEL_FUNCTION;
	198	strncpy(attr->u.ftrace.symbol_name,
	199	ev->attr.ftrace.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	200	attr->u.ftrace.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e	201	break;
e6ddca71 DG	202	case LTTNG_EVENT_TRACEPOINT:
e6ddca71 DG	203	attr->instrumentation = LTTNG_KERNEL_TRACEPOINT;
f3ed775e DG	204	break;
	205	default:
	206	ERR("Unknown kernel instrumentation type (%d)", ev->type);
	207	goto error;
	208	}
	209
	210	/* Copy event name */
	211	strncpy(attr->name, ev->name, LTTNG_SYM_NAME_LEN);
99497cd0	212	attr->name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e	213
54012638 DG	214	/* Setting up a kernel event */
	215	lke->fd = 0;
	216	lke->event = attr;
d36b8583	217	lke->enabled = 1;
e75cda3a	218	lke->ctx = NULL;
54012638 DG	219
	220	return lke;
	221
	222	error:
	223	return NULL;
	224	}
	225
	226	/*
050349bb	227	* Allocate and initialize a kernel metadata.
54012638	228	*
050349bb	229	* Return pointer to structure or NULL.
54012638	230	*/
62499ad6	231	struct ltt_kernel_metadata trace_kernel_create_metadata(char path)
54012638 DG	232	{
	233	int ret;
	234	struct ltt_kernel_metadata *lkm;
f3ed775e	235	struct lttng_channel *chan;
54012638 DG	236
54012638 DG	237	lkm = malloc(sizeof(struct ltt_kernel_metadata));
f3ed775e DG	238	chan = malloc(sizeof(struct lttng_channel));
f3ed775e DG	239	if (lkm == NULL \|\| chan == NULL) {
54012638 DG	240	perror("kernel metadata malloc");
	241	goto error;
	242	}
	243
	244	/* Set default attributes */
f3ed775e	245	chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
b389abbe MD	246	chan->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
b389abbe MD	247	chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
f3ed775e DG	248	chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
f3ed775e DG	249	chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
7d452e12	250	chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
54012638 DG	251
	252	/* Init metadata */
	253	lkm->fd = 0;
f3ed775e	254	lkm->conf = chan;
54012638	255	/* Set default metadata path */
58a97671	256	ret = asprintf(&lkm->pathname, "%s/metadata", path);
54012638 DG	257	if (ret < 0) {
	258	perror("asprintf kernel metadata");
	259	goto error;
	260	}
	261
	262	return lkm;
	263
	264	error:
	265	return NULL;
	266	}
	267
	268	/*
050349bb DG	269	* Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by
050349bb DG	270	* default.
54012638	271	*
050349bb	272	* Return pointer to structure or NULL.
54012638	273	*/
62499ad6	274	struct ltt_kernel_stream *trace_kernel_create_stream(void)
54012638 DG	275	{
	276	struct ltt_kernel_stream *lks;
	277
	278	lks = malloc(sizeof(struct ltt_kernel_stream));
	279	if (lks == NULL) {
	280	perror("kernel stream malloc");
	281	goto error;
	282	}
	283
	284	/* Init stream */
	285	lks->fd = 0;
	286	lks->pathname = NULL;
	287	lks->state = 0;
	288
	289	return lks;
	290
	291	error:
	292	return NULL;
	293	}
c363b55d	294
050349bb DG	295	/*
	296	* Cleanup kernel stream structure.
	297	*/
62499ad6	298	void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream)
c363b55d	299	{
33a2b854	300	DBG("[trace] Closing stream fd %d", stream->fd);
c363b55d DG	301	/* Close kernel fd */
c363b55d DG	302	close(stream->fd);
c363b55d DG	303	/* Remove from stream list */
c363b55d DG	304	cds_list_del(&stream->list);
f9815039 DG	305
f9815039 DG	306	free(stream->pathname);
c363b55d DG	307	free(stream);
	308	}
	309
050349bb DG	310	/*
	311	* Cleanup kernel event structure.
	312	*/
62499ad6	313	void trace_kernel_destroy_event(struct ltt_kernel_event *event)
c363b55d	314	{
33a2b854	315	DBG("[trace] Closing event fd %d", event->fd);
c363b55d DG	316	/* Close kernel fd */
c363b55d DG	317	close(event->fd);
c363b55d DG	318
	319	/* Remove from event list */
	320	cds_list_del(&event->list);
f9815039 DG	321
	322	free(event->event);
	323	free(event->ctx);
c363b55d DG	324	free(event);
	325	}
	326
050349bb DG	327	/*
	328	* Cleanup kernel channel structure.
	329	*/
62499ad6	330	void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel)
c363b55d	331	{
af9737e9 DG	332	struct ltt_kernel_stream stream, stmp;
af9737e9 DG	333	struct ltt_kernel_event event, etmp;
c363b55d	334
33a2b854	335	DBG("[trace] Closing channel fd %d", channel->fd);
c363b55d DG	336	/* Close kernel fd */
c363b55d DG	337	close(channel->fd);
c363b55d DG	338
c363b55d DG	339	/* For each stream in the channel list */
af9737e9	340	cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) {
62499ad6	341	trace_kernel_destroy_stream(stream);
c363b55d DG	342	}
	343
	344	/* For each event in the channel list */
af9737e9	345	cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) {
62499ad6	346	trace_kernel_destroy_event(event);
c363b55d DG	347	}
	348
	349	/* Remove from channel list */
	350	cds_list_del(&channel->list);
f9815039 DG	351
	352	free(channel->pathname);
	353	free(channel->channel);
	354	free(channel->ctx);
c363b55d DG	355	free(channel);
	356	}
	357
050349bb DG	358	/*
	359	* Cleanup kernel metadata structure.
	360	*/
62499ad6	361	void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata)
c363b55d	362	{
33a2b854	363	DBG("[trace] Closing metadata fd %d", metadata->fd);
c363b55d DG	364	/* Close kernel fd */
c363b55d DG	365	close(metadata->fd);
c363b55d	366
f9815039 DG	367	free(metadata->conf);
f9815039 DG	368	free(metadata->pathname);
c363b55d DG	369	free(metadata);
	370	}
	371
050349bb	372	/*
62499ad6	373	* Cleanup kernel session structure
050349bb	374	*/
62499ad6	375	void trace_kernel_destroy_session(struct ltt_kernel_session *session)
c363b55d	376	{
af9737e9	377	struct ltt_kernel_channel channel, ctmp;
c363b55d	378
33a2b854	379	DBG("[trace] Closing session fd %d", session->fd);
c363b55d DG	380	/* Close kernel fds */
c363b55d DG	381	close(session->fd);
f9815039	382
70dc1c34 DG	383	if (session->metadata_stream_fd != 0) {
	384	DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
	385	close(session->metadata_stream_fd);
	386	}
c363b55d	387
d36b8583	388	if (session->metadata != NULL) {
62499ad6	389	trace_kernel_destroy_metadata(session->metadata);
d36b8583	390	}
c363b55d	391
af9737e9	392	cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) {
62499ad6	393	trace_kernel_destroy_channel(channel);
c363b55d DG	394	}
c363b55d DG	395
f9815039	396	free(session->trace_path);
c363b55d DG	397	free(session);
c363b55d DG	398	}