[lttng-tools.git] / lttng-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;
	}

	DBG("Trying to find channel %s", name);

	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 = zmalloc(sizeof(struct ltt_kernel_session));
	if (lks == NULL) {
		perror("create kernel session zmalloc");
		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 = zmalloc(sizeof(struct ltt_kernel_channel));
	if (lkc == NULL) {
		perror("ltt_kernel_channel zmalloc");
		goto error;
	}

	lkc->channel = zmalloc(sizeof(struct lttng_channel));
	if (lkc->channel == NULL) {
		perror("lttng_channel zmalloc");
		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 = zmalloc(sizeof(struct ltt_kernel_event));
	attr = zmalloc(sizeof(struct lttng_kernel_event));
	if (lke == NULL || attr == NULL) {
		perror("kernel event zmalloc");
		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;
	case LTTNG_EVENT_SYSCALL:
		attr->instrumentation = LTTNG_KERNEL_SYSCALL;
		break;
	case LTTNG_EVENT_ALL:
		attr->instrumentation = LTTNG_KERNEL_ALL;
		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 = zmalloc(sizeof(struct ltt_kernel_metadata));
	chan = zmalloc(sizeof(struct lttng_channel));
	if (lkm == NULL || chan == NULL) {
		perror("kernel metadata zmalloc");
		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 = zmalloc(sizeof(struct ltt_kernel_stream));
	if (lks == NULL) {
		perror("kernel stream zmalloc");
		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
54d01ffb DG	42	DBG("Trying to find channel %s", name);
54d01ffb DG	43
19e70852 DG	44	cds_list_for_each_entry(chan, &session->channel_list.head, list) {
	45	if (strcmp(name, chan->channel->name) == 0) {
	46	DBG("Found channel by name %s", name);
	47	return chan;
	48	}
	49	}
	50
	51	error:
	52	return NULL;
	53	}
	54
	55	/*
050349bb	56	* Find the event name for the given channel.
19e70852	57	*/
62499ad6	58	struct ltt_kernel_event *trace_kernel_get_event_by_name(
19e70852 DG	59	char name, struct ltt_kernel_channel channel)
	60	{
	61	struct ltt_kernel_event *ev;
	62
	63	if (channel == NULL) {
	64	ERR("Undefine channel");
	65	goto error;
	66	}
	67
	68	cds_list_for_each_entry(ev, &channel->events_list.head, list) {
	69	if (strcmp(name, ev->event->name) == 0) {
	70	DBG("Found event by name %s for channel %s", name,
	71	channel->channel->name);
	72	return ev;
	73	}
	74	}
	75
	76	error:
	77	return NULL;
	78	}
	79
54012638	80	/*
050349bb	81	* Allocate and initialize a kernel session data structure.
54012638	82	*
050349bb	83	* Return pointer to structure or NULL.
54012638	84	*/
f9815039	85	struct ltt_kernel_session trace_kernel_create_session(char path)
54012638	86	{
f9815039	87	int ret;
54012638 DG	88	struct ltt_kernel_session *lks;
	89
	90	/* Allocate a new ltt kernel session */
ba7f0ae5	91	lks = zmalloc(sizeof(struct ltt_kernel_session));
54012638	92	if (lks == NULL) {
ba7f0ae5	93	perror("create kernel session zmalloc");
54012638 DG	94	goto error;
	95	}
	96
	97	/* Init data structure */
	98	lks->fd = 0;
	99	lks->metadata_stream_fd = 0;
	100	lks->channel_count = 0;
	101	lks->stream_count_global = 0;
	102	lks->metadata = NULL;
d9800920	103	lks->consumer_fd = 0;
54012638 DG	104	CDS_INIT_LIST_HEAD(&lks->channel_list.head);
54012638 DG	105
f9815039 DG	106	/* Set session path */
	107	ret = asprintf(&lks->trace_path, "%s/kernel", path);
	108	if (ret < 0) {
	109	perror("asprintf kernel traces path");
	110	goto error;
	111	}
	112
54012638 DG	113	return lks;
	114
	115	error:
	116	return NULL;
	117	}
	118
	119	/*
050349bb	120	* Allocate and initialize a kernel channel data structure.
54012638	121	*
050349bb	122	* Return pointer to structure or NULL.
54012638	123	*/
62499ad6	124	struct ltt_kernel_channel trace_kernel_create_channel(struct lttng_channel chan, char *path)
54012638 DG	125	{
	126	int ret;
	127	struct ltt_kernel_channel *lkc;
54012638	128
ba7f0ae5	129	lkc = zmalloc(sizeof(struct ltt_kernel_channel));
f3ed775e	130	if (lkc == NULL) {
ba7f0ae5	131	perror("ltt_kernel_channel zmalloc");
54012638 DG	132	goto error;
	133	}
	134
ba7f0ae5	135	lkc->channel = zmalloc(sizeof(struct lttng_channel));
f3ed775e	136	if (lkc->channel == NULL) {
ba7f0ae5	137	perror("lttng_channel zmalloc");
f3ed775e DG	138	goto error;
	139	}
	140	memcpy(lkc->channel, chan, sizeof(struct lttng_channel));
54012638 DG	141
	142	lkc->fd = 0;
	143	lkc->stream_count = 0;
cbbbb275	144	lkc->event_count = 0;
d36b8583	145	lkc->enabled = 1;
e75cda3a	146	lkc->ctx = NULL;
54012638 DG	147	/* Init linked list */
	148	CDS_INIT_LIST_HEAD(&lkc->events_list.head);
	149	CDS_INIT_LIST_HEAD(&lkc->stream_list.head);
	150	/* Set default trace output path */
b082db07	151	ret = asprintf(&lkc->pathname, "%s", path);
54012638 DG	152	if (ret < 0) {
	153	perror("asprintf kernel create channel");
	154	goto error;
	155	}
	156
	157	return lkc;
	158
	159	error:
	160	return NULL;
	161	}
	162
	163	/*
050349bb	164	* Allocate and initialize a kernel event. Set name and event type.
54012638	165	*
050349bb	166	* Return pointer to structure or NULL.
54012638	167	*/
62499ad6	168	struct ltt_kernel_event trace_kernel_create_event(struct lttng_event ev)
54012638 DG	169	{
	170	struct ltt_kernel_event *lke;
	171	struct lttng_kernel_event *attr;
	172
ba7f0ae5 DG	173	lke = zmalloc(sizeof(struct ltt_kernel_event));
ba7f0ae5 DG	174	attr = zmalloc(sizeof(struct lttng_kernel_event));
54012638	175	if (lke == NULL \|\| attr == NULL) {
ba7f0ae5	176	perror("kernel event zmalloc");
54012638 DG	177	goto error;
	178	}
	179
f3ed775e	180	switch (ev->type) {
7d29a247	181	case LTTNG_EVENT_PROBE:
e6ddca71	182	attr->instrumentation = LTTNG_KERNEL_KPROBE;
7d29a247 DG	183	attr->u.kprobe.addr = ev->attr.probe.addr;
7d29a247 DG	184	attr->u.kprobe.offset = ev->attr.probe.offset;
f3ed775e	185	strncpy(attr->u.kprobe.symbol_name,
7d29a247	186	ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	187	attr->u.kprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e DG	188	break;
f3ed775e DG	189	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	190	attr->instrumentation = LTTNG_KERNEL_KRETPROBE;
	191	attr->u.kretprobe.addr = ev->attr.probe.addr;
	192	attr->u.kretprobe.offset = ev->attr.probe.offset;
	193	attr->u.kretprobe.offset = ev->attr.probe.offset;
	194	strncpy(attr->u.kretprobe.symbol_name,
	195	ev->attr.probe.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	196	attr->u.kretprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
8f0d098b MD	197	break;
8f0d098b MD	198	case LTTNG_EVENT_FUNCTION_ENTRY:
f3ed775e DG	199	attr->instrumentation = LTTNG_KERNEL_FUNCTION;
	200	strncpy(attr->u.ftrace.symbol_name,
	201	ev->attr.ftrace.symbol_name, LTTNG_SYM_NAME_LEN);
99497cd0	202	attr->u.ftrace.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e	203	break;
e6ddca71 DG	204	case LTTNG_EVENT_TRACEPOINT:
e6ddca71 DG	205	attr->instrumentation = LTTNG_KERNEL_TRACEPOINT;
f3ed775e	206	break;
a54bd42d MD	207	case LTTNG_EVENT_SYSCALL:
a54bd42d MD	208	attr->instrumentation = LTTNG_KERNEL_SYSCALL;
0133c199	209	break;
7a3d1328 MD	210	case LTTNG_EVENT_ALL:
	211	attr->instrumentation = LTTNG_KERNEL_ALL;
	212	break;
f3ed775e DG	213	default:
	214	ERR("Unknown kernel instrumentation type (%d)", ev->type);
	215	goto error;
	216	}
	217
	218	/* Copy event name */
	219	strncpy(attr->name, ev->name, LTTNG_SYM_NAME_LEN);
99497cd0	220	attr->name[LTTNG_SYM_NAME_LEN - 1] = '\0';
f3ed775e	221
54012638 DG	222	/* Setting up a kernel event */
	223	lke->fd = 0;
	224	lke->event = attr;
d36b8583	225	lke->enabled = 1;
e75cda3a	226	lke->ctx = NULL;
54012638 DG	227
	228	return lke;
	229
	230	error:
	231	return NULL;
	232	}
	233
	234	/*
050349bb	235	* Allocate and initialize a kernel metadata.
54012638	236	*
050349bb	237	* Return pointer to structure or NULL.
54012638	238	*/
62499ad6	239	struct ltt_kernel_metadata trace_kernel_create_metadata(char path)
54012638 DG	240	{
	241	int ret;
	242	struct ltt_kernel_metadata *lkm;
f3ed775e	243	struct lttng_channel *chan;
54012638	244
ba7f0ae5 DG	245	lkm = zmalloc(sizeof(struct ltt_kernel_metadata));
ba7f0ae5 DG	246	chan = zmalloc(sizeof(struct lttng_channel));
f3ed775e	247	if (lkm == NULL \|\| chan == NULL) {
ba7f0ae5	248	perror("kernel metadata zmalloc");
54012638 DG	249	goto error;
	250	}
	251
	252	/* Set default attributes */
f3ed775e	253	chan->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
b389abbe MD	254	chan->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE;
b389abbe MD	255	chan->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
f3ed775e DG	256	chan->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
f3ed775e DG	257	chan->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
7d452e12	258	chan->attr.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
54012638 DG	259
	260	/* Init metadata */
	261	lkm->fd = 0;
f3ed775e	262	lkm->conf = chan;
54012638	263	/* Set default metadata path */
58a97671	264	ret = asprintf(&lkm->pathname, "%s/metadata", path);
54012638 DG	265	if (ret < 0) {
	266	perror("asprintf kernel metadata");
	267	goto error;
	268	}
	269
	270	return lkm;
	271
	272	error:
	273	return NULL;
	274	}
	275
	276	/*
050349bb DG	277	* Allocate and initialize a kernel stream. The stream is set to ACTIVE_FD by
050349bb DG	278	* default.
54012638	279	*
050349bb	280	* Return pointer to structure or NULL.
54012638	281	*/
62499ad6	282	struct ltt_kernel_stream *trace_kernel_create_stream(void)
54012638 DG	283	{
	284	struct ltt_kernel_stream *lks;
	285
ba7f0ae5	286	lks = zmalloc(sizeof(struct ltt_kernel_stream));
54012638	287	if (lks == NULL) {
ba7f0ae5	288	perror("kernel stream zmalloc");
54012638 DG	289	goto error;
	290	}
	291
	292	/* Init stream */
	293	lks->fd = 0;
	294	lks->pathname = NULL;
	295	lks->state = 0;
	296
	297	return lks;
	298
	299	error:
	300	return NULL;
	301	}
c363b55d	302
050349bb DG	303	/*
	304	* Cleanup kernel stream structure.
	305	*/
62499ad6	306	void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream)
c363b55d	307	{
33a2b854	308	DBG("[trace] Closing stream fd %d", stream->fd);
c363b55d DG	309	/* Close kernel fd */
c363b55d DG	310	close(stream->fd);
c363b55d DG	311	/* Remove from stream list */
c363b55d DG	312	cds_list_del(&stream->list);
f9815039 DG	313
f9815039 DG	314	free(stream->pathname);
c363b55d DG	315	free(stream);
	316	}
	317
050349bb DG	318	/*
	319	* Cleanup kernel event structure.
	320	*/
62499ad6	321	void trace_kernel_destroy_event(struct ltt_kernel_event *event)
c363b55d	322	{
33a2b854	323	DBG("[trace] Closing event fd %d", event->fd);
c363b55d DG	324	/* Close kernel fd */
c363b55d DG	325	close(event->fd);
c363b55d DG	326
	327	/* Remove from event list */
	328	cds_list_del(&event->list);
f9815039 DG	329
	330	free(event->event);
	331	free(event->ctx);
c363b55d DG	332	free(event);
	333	}
	334
050349bb DG	335	/*
	336	* Cleanup kernel channel structure.
	337	*/
62499ad6	338	void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel)
c363b55d	339	{
af9737e9 DG	340	struct ltt_kernel_stream stream, stmp;
af9737e9 DG	341	struct ltt_kernel_event event, etmp;
c363b55d	342
33a2b854	343	DBG("[trace] Closing channel fd %d", channel->fd);
c363b55d DG	344	/* Close kernel fd */
c363b55d DG	345	close(channel->fd);
c363b55d DG	346
c363b55d DG	347	/* For each stream in the channel list */
af9737e9	348	cds_list_for_each_entry_safe(stream, stmp, &channel->stream_list.head, list) {
62499ad6	349	trace_kernel_destroy_stream(stream);
c363b55d DG	350	}
	351
	352	/* For each event in the channel list */
af9737e9	353	cds_list_for_each_entry_safe(event, etmp, &channel->events_list.head, list) {
62499ad6	354	trace_kernel_destroy_event(event);
c363b55d DG	355	}
	356
	357	/* Remove from channel list */
	358	cds_list_del(&channel->list);
f9815039 DG	359
	360	free(channel->pathname);
	361	free(channel->channel);
	362	free(channel->ctx);
c363b55d DG	363	free(channel);
	364	}
	365
050349bb DG	366	/*
	367	* Cleanup kernel metadata structure.
	368	*/
62499ad6	369	void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata)
c363b55d	370	{
33a2b854	371	DBG("[trace] Closing metadata fd %d", metadata->fd);
c363b55d DG	372	/* Close kernel fd */
c363b55d DG	373	close(metadata->fd);
c363b55d	374
f9815039 DG	375	free(metadata->conf);
f9815039 DG	376	free(metadata->pathname);
c363b55d DG	377	free(metadata);
	378	}
	379
050349bb	380	/*
62499ad6	381	* Cleanup kernel session structure
050349bb	382	*/
62499ad6	383	void trace_kernel_destroy_session(struct ltt_kernel_session *session)
c363b55d	384	{
af9737e9	385	struct ltt_kernel_channel channel, ctmp;
c363b55d	386
33a2b854	387	DBG("[trace] Closing session fd %d", session->fd);
c363b55d DG	388	/* Close kernel fds */
c363b55d DG	389	close(session->fd);
f9815039	390
70dc1c34 DG	391	if (session->metadata_stream_fd != 0) {
	392	DBG("[trace] Closing metadata stream fd %d", session->metadata_stream_fd);
	393	close(session->metadata_stream_fd);
	394	}
c363b55d	395
d36b8583	396	if (session->metadata != NULL) {
62499ad6	397	trace_kernel_destroy_metadata(session->metadata);
d36b8583	398	}
c363b55d	399
af9737e9	400	cds_list_for_each_entry_safe(channel, ctmp, &session->channel_list.head, list) {
62499ad6	401	trace_kernel_destroy_channel(channel);
c363b55d DG	402	}
c363b55d DG	403
f9815039	404	free(session->trace_path);
c363b55d DG	405	free(session);
c363b55d DG	406	}