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

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@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 _LGPL_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <urcu/list.h>

#include <common/error.h>
#include <common/sessiond-comm/sessiond-comm.h>

#include "context.h"
#include "kernel.h"
#include "ust-app.h"
#include "trace-ust.h"
#include "agent.h"

/*
 * Add kernel context to all channel.
 */
static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
		struct ltt_kernel_context *kctx)
{
	int ret;
	struct ltt_kernel_channel *kchan;

	assert(ksession);
	assert(kctx);

	DBG("Adding kernel context to all channels");

	/* Go over all channels */
	cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
		ret = kernel_add_channel_context(kchan, kctx);
		if (ret < 0) {
			ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
			goto error;
		}
	}

	ret = LTTNG_OK;

error:
	return ret;
}

/*
 * Add kernel context to a specific channel.
 */
static int add_kctx_to_channel(struct ltt_kernel_context *kctx,
		struct ltt_kernel_channel *kchan)
{
	int ret;

	assert(kchan);
	assert(kctx);

	DBG("Add kernel context to channel '%s'", kchan->channel->name);

	ret = kernel_add_channel_context(kchan, kctx);
	if (ret < 0) {
		ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
		goto error;
	}

	ret = LTTNG_OK;

error:
	return ret;
}

/*
 * Add UST context to channel.
 */
static int add_uctx_to_channel(struct ltt_ust_session *usess,
		enum lttng_domain_type domain,
		struct ltt_ust_channel *uchan, struct lttng_event_context *ctx)
{
	int ret;
	struct ltt_ust_context *uctx = NULL;

	assert(usess);
	assert(uchan);
	assert(ctx);

	/* Check if context is duplicate */
	cds_list_for_each_entry(uctx, &uchan->ctx_list, list) {
		if (trace_ust_match_context(uctx, ctx)) {
			ret = -EEXIST;
			goto duplicate;
		}
	}
	uctx = NULL;

	switch (domain) {
	case LTTNG_DOMAIN_JUL:
	case LTTNG_DOMAIN_LOG4J:
	{
		struct agent *agt = trace_ust_find_agent(usess, domain);

		if (!agt) {
			agt = agent_create(domain);
			if (!agt) {
				ret = LTTNG_ERR_NOMEM;
				goto error;
			}
			agent_add(agt, usess->agents);
		}
		ret = agent_add_context(ctx, agt);
		if (ret != LTTNG_OK) {
			goto error;
		}

		ret = agent_enable_context(ctx, domain);
		if (ret != LTTNG_OK) {
			goto error;
		}
		break;
	}
	case LTTNG_DOMAIN_UST:
		break;
	default:
		assert(0);
	}

	/* Create ltt UST context */
	uctx = trace_ust_create_context(ctx);
	if (uctx == NULL) {
		ret = -EINVAL;
		goto error;
	}

	ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
	if (ret < 0) {
		goto error;
	}

	rcu_read_lock();

	/* Add ltt UST context node to ltt UST channel */
	lttng_ht_add_ulong(uchan->ctx, &uctx->node);
	rcu_read_unlock();
	cds_list_add_tail(&uctx->list, &uchan->ctx_list);

	DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);

	return 0;

error:
	free(uctx);
duplicate:
	return ret;
}

/*
 * Add kernel context to tracer.
 */
int context_kernel_add(struct ltt_kernel_session *ksession,
		struct lttng_event_context *ctx, char *channel_name)
{
	int ret;
	struct ltt_kernel_channel *kchan;
	struct ltt_kernel_context *kctx;

	assert(ksession);
	assert(ctx);
	assert(channel_name);

	kctx = trace_kernel_create_context(NULL);
	if (!kctx) {
		ret = LTTNG_ERR_NOMEM;
		goto error;
	}

	/* Setup kernel context structure */
	switch (ctx->ctx) {
	case LTTNG_EVENT_CONTEXT_PID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID;
		break;
	case LTTNG_EVENT_CONTEXT_PROCNAME:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME;
		break;
	case LTTNG_EVENT_CONTEXT_PRIO:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO;
		break;
	case LTTNG_EVENT_CONTEXT_NICE:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE;
		break;
	case LTTNG_EVENT_CONTEXT_VPID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID;
		break;
	case LTTNG_EVENT_CONTEXT_TID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID;
		break;
	case LTTNG_EVENT_CONTEXT_VTID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID;
		break;
	case LTTNG_EVENT_CONTEXT_PPID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID;
		break;
	case LTTNG_EVENT_CONTEXT_VPPID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID;
		break;
	case LTTNG_EVENT_CONTEXT_HOSTNAME:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME;
		break;
	case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
	case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER;
		break;
	default:
		ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
		goto error;
	}

	kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
	kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
	strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name,
			LTTNG_SYMBOL_NAME_LEN);
	kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';

	if (*channel_name == '\0') {
		ret = add_kctx_all_channels(ksession, kctx);
		if (ret != LTTNG_OK) {
			goto error;
		}
	} else {
		/* Get kernel channel */
		kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
		if (kchan == NULL) {
			ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
			goto error;
		}

		ret = add_kctx_to_channel(kctx, kchan);
		if (ret != LTTNG_OK) {
			goto error;
		}
	}

	return LTTNG_OK;

error:
	if (kctx) {
		trace_kernel_destroy_context(kctx);
	}
	return ret;
}

/*
 * Add UST context to tracer.
 */
int context_ust_add(struct ltt_ust_session *usess,
		enum lttng_domain_type domain, struct lttng_event_context *ctx,
		char *channel_name)
{
	int ret = LTTNG_OK;
	struct lttng_ht_iter iter;
	struct lttng_ht *chan_ht;
	struct ltt_ust_channel *uchan = NULL;

	assert(usess);
	assert(ctx);
	assert(channel_name);

	rcu_read_lock();

	chan_ht = usess->domain_global.channels;

	/* Get UST channel if defined */
	if (channel_name[0] != '\0') {
		uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
		if (uchan == NULL) {
			ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
			goto error;
		}
	}

	if (uchan) {
		/* Add ctx to channel */
		ret = add_uctx_to_channel(usess, domain, uchan, ctx);
	} else {
		rcu_read_lock();
		/* Add ctx all events, all channels */
		cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
			ret = add_uctx_to_channel(usess, domain, uchan, ctx);
			if (ret < 0) {
				ERR("Failed to add context to channel %s",
						uchan->name);
				continue;
			}
		}
		rcu_read_unlock();
	}

	switch (ret) {
	case -EEXIST:
		ret = LTTNG_ERR_UST_CONTEXT_EXIST;
		break;
	case -ENOMEM:
		ret = LTTNG_ERR_FATAL;
		break;
	case -EINVAL:
		ret = LTTNG_ERR_UST_CONTEXT_INVAL;
		break;
	case -ENOSYS:
		ret = LTTNG_ERR_UNKNOWN_DOMAIN;
		break;
	default:
		ret = LTTNG_OK;
		break;
	}

error:
	rcu_read_unlock();
	return ret;
}
Commit	Line	Data
b579acd9	1	/*
bdf64013 JG	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
bdf64013 JG	3	* Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
b579acd9	4	*
d14d33bf AM	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License, version 2 only,
	7	* as published by the Free Software Foundation.
b579acd9	8	*
d14d33bf AM	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.
b579acd9	13	*
d14d33bf AM	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
b579acd9 DG	17	*/
b579acd9 DG	18
6c1c0768	19	#define _LGPL_SOURCE
b579acd9 DG	20	#include <stdio.h>
	21	#include <stdlib.h>
	22	#include <string.h>
	23	#include <unistd.h>
54d01ffb	24	#include <urcu/list.h>
1e307fab	25
db758600	26	#include <common/error.h>
10a8a223	27	#include <common/sessiond-comm/sessiond-comm.h>
b579acd9	28
b579acd9	29	#include "context.h"
4771f025	30	#include "kernel.h"
55cc08a6	31	#include "ust-app.h"
34378f76	32	#include "trace-ust.h"
bdf64013	33	#include "agent.h"
b579acd9	34
b579acd9 DG	35	/*
b579acd9 DG	36	* Add kernel context to all channel.
b579acd9 DG	37	*/
b579acd9 DG	38	static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
645328ae	39	struct ltt_kernel_context *kctx)
b579acd9	40	{
601d5acf	41	int ret;
b579acd9 DG	42	struct ltt_kernel_channel *kchan;
b579acd9 DG	43
0525e9ae DG	44	assert(ksession);
	45	assert(kctx);
	46
601d5acf	47	DBG("Adding kernel context to all channels");
b579acd9 DG	48
	49	/* Go over all channels */
	50	cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
601d5acf DG	51	ret = kernel_add_channel_context(kchan, kctx);
	52	if (ret < 0) {
	53	ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
	54	goto error;
b579acd9 DG	55	}
	56	}
	57
f73fabfd	58	ret = LTTNG_OK;
b579acd9 DG	59
	60	error:
	61	return ret;
	62	}
	63
	64	/*
	65	* Add kernel context to a specific channel.
b579acd9	66	*/
645328ae	67	static int add_kctx_to_channel(struct ltt_kernel_context *kctx,
601d5acf	68	struct ltt_kernel_channel *kchan)
b579acd9	69	{
601d5acf	70	int ret;
b579acd9	71
0525e9ae DG	72	assert(kchan);
	73	assert(kctx);
	74
601d5acf	75	DBG("Add kernel context to channel '%s'", kchan->channel->name);
b579acd9	76
601d5acf DG	77	ret = kernel_add_channel_context(kchan, kctx);
	78	if (ret < 0) {
	79	ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
b579acd9 DG	80	goto error;
	81	}
	82
f73fabfd	83	ret = LTTNG_OK;
b579acd9 DG	84
	85	error:
	86	return ret;
	87	}
	88
6b79ed20 DG	89	/*
	90	* Add UST context to channel.
	91	*/
4ce7709b JG	92	static int add_uctx_to_channel(struct ltt_ust_session *usess,
4ce7709b JG	93	enum lttng_domain_type domain,
6b79ed20 DG	94	struct ltt_ust_channel uchan, struct lttng_event_context ctx)
	95	{
	96	int ret;
bdf64013	97	struct ltt_ust_context *uctx = NULL;
6b79ed20	98
0525e9ae DG	99	assert(usess);
	100	assert(uchan);
	101	assert(ctx);
	102
aa3514e9 MD	103	/* Check if context is duplicate */
	104	cds_list_for_each_entry(uctx, &uchan->ctx_list, list) {
	105	if (trace_ust_match_context(uctx, ctx)) {
	106	ret = -EEXIST;
	107	goto duplicate;
	108	}
	109	}
bdf64013 JG	110	uctx = NULL;
	111
	112	switch (domain) {
	113	case LTTNG_DOMAIN_JUL:
	114	case LTTNG_DOMAIN_LOG4J:
	115	{
	116	struct agent *agt = trace_ust_find_agent(usess, domain);
	117
	118	if (!agt) {
	119	agt = agent_create(domain);
	120	if (!agt) {
	121	ret = LTTNG_ERR_NOMEM;
	122	goto error;
	123	}
	124	agent_add(agt, usess->agents);
	125	}
	126	ret = agent_add_context(ctx, agt);
	127	if (ret != LTTNG_OK) {
	128	goto error;
	129	}
	130
	131	ret = agent_enable_context(ctx, domain);
	132	if (ret != LTTNG_OK) {
	133	goto error;
	134	}
	135	break;
	136	}
	137	case LTTNG_DOMAIN_UST:
	138	break;
	139	default:
	140	assert(0);
	141	}
aa3514e9	142
6b79ed20 DG	143	/* Create ltt UST context */
	144	uctx = trace_ust_create_context(ctx);
	145	if (uctx == NULL) {
727d5404	146	ret = -EINVAL;
6b79ed20 DG	147	goto error;
	148	}
	149
c0c66aec JG	150	ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
c0c66aec JG	151	if (ret < 0) {
727d5404 DG	152	goto error;
	153	}
	154
e7fe706f DG	155	rcu_read_lock();
e7fe706f DG	156
6b79ed20	157	/* Add ltt UST context node to ltt UST channel */
aa3514e9	158	lttng_ht_add_ulong(uchan->ctx, &uctx->node);
e7fe706f	159	rcu_read_unlock();
31746f93	160	cds_list_add_tail(&uctx->list, &uchan->ctx_list);
6b79ed20	161
727d5404 DG	162	DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
	163
	164	return 0;
6b79ed20 DG	165
	166	error:
	167	free(uctx);
aa3514e9	168	duplicate:
6b79ed20 DG	169	return ret;
	170	}
	171
b579acd9 DG	172	/*
	173	* Add kernel context to tracer.
	174	*/
54d01ffb	175	int context_kernel_add(struct ltt_kernel_session *ksession,
601d5acf	176	struct lttng_event_context ctx, char channel_name)
b579acd9 DG	177	{
	178	int ret;
	179	struct ltt_kernel_channel *kchan;
645328ae	180	struct ltt_kernel_context *kctx;
54d01ffb	181
0525e9ae DG	182	assert(ksession);
	183	assert(ctx);
	184	assert(channel_name);
	185
645328ae DG	186	kctx = trace_kernel_create_context(NULL);
	187	if (!kctx) {
	188	ret = LTTNG_ERR_NOMEM;
	189	goto error;
	190	}
	191
54d01ffb	192	/* Setup kernel context structure */
9197c5c4 MD	193	switch (ctx->ctx) {
9197c5c4 MD	194	case LTTNG_EVENT_CONTEXT_PID:
645328ae	195	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID;
9197c5c4	196	break;
9197c5c4	197	case LTTNG_EVENT_CONTEXT_PROCNAME:
645328ae	198	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME;
9197c5c4 MD	199	break;
9197c5c4 MD	200	case LTTNG_EVENT_CONTEXT_PRIO:
645328ae	201	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO;
9197c5c4 MD	202	break;
9197c5c4 MD	203	case LTTNG_EVENT_CONTEXT_NICE:
645328ae	204	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE;
9197c5c4 MD	205	break;
9197c5c4 MD	206	case LTTNG_EVENT_CONTEXT_VPID:
645328ae	207	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID;
9197c5c4 MD	208	break;
9197c5c4 MD	209	case LTTNG_EVENT_CONTEXT_TID:
645328ae	210	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID;
9197c5c4 MD	211	break;
9197c5c4 MD	212	case LTTNG_EVENT_CONTEXT_VTID:
645328ae	213	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID;
9197c5c4 MD	214	break;
9197c5c4 MD	215	case LTTNG_EVENT_CONTEXT_PPID:
645328ae	216	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID;
9197c5c4 MD	217	break;
9197c5c4 MD	218	case LTTNG_EVENT_CONTEXT_VPPID:
645328ae	219	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID;
9197c5c4	220	break;
54773d68	221	case LTTNG_EVENT_CONTEXT_HOSTNAME:
645328ae	222	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME;
54773d68	223	break;
aa3514e9 MD	224	case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
aa3514e9 MD	225	case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
645328ae	226	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER;
aa3514e9	227	break;
9197c5c4	228	default:
fc7324e8 DG	229	ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
fc7324e8 DG	230	goto error;
9197c5c4 MD	231	}
9197c5c4 MD	232
645328ae DG	233	kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
	234	kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
	235	strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name,
54d01ffb	236	LTTNG_SYMBOL_NAME_LEN);
645328ae	237	kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
b579acd9	238
9d035200	239	if (*channel_name == '\0') {
645328ae	240	ret = add_kctx_all_channels(ksession, kctx);
f73fabfd	241	if (ret != LTTNG_OK) {
b579acd9 DG	242	goto error;
	243	}
	244	} else {
	245	/* Get kernel channel */
62499ad6	246	kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
b579acd9	247	if (kchan == NULL) {
f73fabfd	248	ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
b579acd9 DG	249	goto error;
	250	}
	251
645328ae	252	ret = add_kctx_to_channel(kctx, kchan);
f73fabfd	253	if (ret != LTTNG_OK) {
b579acd9 DG	254	goto error;
	255	}
	256	}
	257
fc7324e8	258	return LTTNG_OK;
b579acd9 DG	259
b579acd9 DG	260	error:
fc7324e8 DG	261	if (kctx) {
	262	trace_kernel_destroy_context(kctx);
	263	}
b579acd9 DG	264	return ret;
b579acd9 DG	265	}
2bdd86d4 MD	266
2bdd86d4 MD	267	/*
55cc08a6	268	* Add UST context to tracer.
2bdd86d4	269	*/
4ce7709b JG	270	int context_ust_add(struct ltt_ust_session *usess,
	271	enum lttng_domain_type domain, struct lttng_event_context *ctx,
	272	char *channel_name)
2bdd86d4	273	{
601d5acf	274	int ret = LTTNG_OK;
442359c0	275	struct lttng_ht_iter iter;
bec39940	276	struct lttng_ht *chan_ht;
55cc08a6	277	struct ltt_ust_channel *uchan = NULL;
2bdd86d4	278
0525e9ae DG	279	assert(usess);
	280	assert(ctx);
	281	assert(channel_name);
	282
2223c96f DG	283	rcu_read_lock();
2223c96f DG	284
f5501dad	285	chan_ht = usess->domain_global.channels;
2bdd86d4	286
55cc08a6	287	/* Get UST channel if defined */
9f9ee9c9	288	if (channel_name[0] != '\0') {
55cc08a6 DG	289	uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
55cc08a6 DG	290	if (uchan == NULL) {
f73fabfd	291	ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
2bdd86d4 MD	292	goto error;
2bdd86d4 MD	293	}
55cc08a6 DG	294	}
55cc08a6 DG	295
601d5acf DG	296	if (uchan) {
601d5acf DG	297	/* Add ctx to channel */
6b79ed20	298	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
601d5acf	299	} else {
e7fe706f	300	rcu_read_lock();
601d5acf	301	/* Add ctx all events, all channels */
bec39940	302	cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
6b79ed20	303	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
55cc08a6	304	if (ret < 0) {
9589be74 JG	305	ERR("Failed to add context to channel %s",
9589be74 JG	306	uchan->name);
55cc08a6 DG	307	continue;
55cc08a6 DG	308	}
2bdd86d4	309	}
e7fe706f	310	rcu_read_unlock();
55cc08a6	311	}
2bdd86d4	312
55cc08a6 DG	313	switch (ret) {
55cc08a6 DG	314	case -EEXIST:
f73fabfd	315	ret = LTTNG_ERR_UST_CONTEXT_EXIST;
727d5404	316	break;
55cc08a6	317	case -ENOMEM:
f73fabfd	318	ret = LTTNG_ERR_FATAL;
727d5404 DG	319	break;
727d5404 DG	320	case -EINVAL:
f73fabfd	321	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
727d5404 DG	322	break;
727d5404 DG	323	case -ENOSYS:
f73fabfd	324	ret = LTTNG_ERR_UNKNOWN_DOMAIN;
727d5404 DG	325	break;
727d5404 DG	326	default:
f73fabfd	327	ret = LTTNG_OK;
727d5404	328	break;
2bdd86d4 MD	329	}
2bdd86d4 MD	330
2bdd86d4	331	error:
2223c96f	332	rcu_read_unlock();
2bdd86d4 MD	333	return ret;
2bdd86d4 MD	334	}