[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.
 *
 * Assumes the ownership of kctx.
 */
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) {
		struct ltt_kernel_context *kctx_copy;

		kctx_copy = trace_kernel_copy_context(kctx);
		if (!kctx_copy) {
			PERROR("zmalloc ltt_kernel_context");
			ret = -LTTNG_ERR_NOMEM;
			goto error;
		}

		/* Ownership of kctx_copy is transferred to the callee. */
		ret = kernel_add_channel_context(kchan, kctx_copy);
		kctx_copy = NULL;
		if (ret != 0) {
			goto error;
		}
	}

	ret = LTTNG_OK;

error:
	trace_kernel_destroy_context(kctx);
	return ret;
}

/*
 * Add kernel context to a specific channel.
 *
 * Assumes the ownership of kctx.
 */
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);

	/* Ownership of kctx is transferred to the callee. */
	ret = kernel_add_channel_context(kchan, kctx);
	kctx = NULL;
	if (ret != 0) {
		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,
		const 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 = LTTNG_ERR_UST_CONTEXT_EXIST;
			goto duplicate;
		}
	}
	uctx = NULL;

	switch (domain) {
	case LTTNG_DOMAIN_JUL:
	case LTTNG_DOMAIN_LOG4J:
	{
		struct agent *agt;

		if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
			/* Other contexts are not needed by the agent. */
			break;
		}
		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 = LTTNG_ERR_UST_CONTEXT_INVAL;
		goto error;
	}

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

	if (!usess->active) {
		goto end;
	}

	ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
	if (ret < 0) {
		goto error;
	}
end:
	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,
		const 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;
	case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE;
		break;
	case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PREEMPTIBLE;
		break;
	case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE;
		break;
	case LTTNG_EVENT_CONTEXT_MIGRATABLE:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MIGRATABLE;
		break;
	case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL;
		break;
	case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_USER;
		break;
	case LTTNG_EVENT_CONTEXT_CGROUP_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CGROUP_NS;
		break;
	case LTTNG_EVENT_CONTEXT_IPC_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_IPC_NS;
		break;
	case LTTNG_EVENT_CONTEXT_MNT_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MNT_NS;
		break;
	case LTTNG_EVENT_CONTEXT_NET_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NET_NS;
		break;
	case LTTNG_EVENT_CONTEXT_PID_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID_NS;
		break;
	case LTTNG_EVENT_CONTEXT_USER_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_USER_NS;
		break;
	case LTTNG_EVENT_CONTEXT_UTS_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UTS_NS;
		break;
	case LTTNG_EVENT_CONTEXT_UID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UID;
		break;
	case LTTNG_EVENT_CONTEXT_EUID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EUID;
		break;
	case LTTNG_EVENT_CONTEXT_SUID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SUID;
		break;
	case LTTNG_EVENT_CONTEXT_GID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_GID;
		break;
	case LTTNG_EVENT_CONTEXT_EGID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EGID;
		break;
	case LTTNG_EVENT_CONTEXT_SGID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SGID;
		break;
	case LTTNG_EVENT_CONTEXT_VUID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VUID;
		break;
	case LTTNG_EVENT_CONTEXT_VEUID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEUID;
		break;
	case LTTNG_EVENT_CONTEXT_VSUID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSUID;
		break;
	case LTTNG_EVENT_CONTEXT_VGID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VGID;
		break;
	case LTTNG_EVENT_CONTEXT_VEGID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEGID;
		break;
	case LTTNG_EVENT_CONTEXT_VSGID:
		kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSGID;
		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);
		/* Ownership of kctx is transferred to the callee. */
		kctx = NULL;
		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);
		/* Ownership of kctx is transferred to the callee. */
		kctx = NULL;
		if (ret != LTTNG_OK) {
			goto error;
		}
	}

	ret = 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,
		const 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) {
				ERR("Failed to add context to channel %s",
						uchan->name);
				continue;
			}
		}
		rcu_read_unlock();
	}

	switch (ret) {
	case LTTNG_ERR_UST_CONTEXT_EXIST:
		break;
	case -ENOMEM:
	case -LTTNG_ERR_NOMEM:
		ret = LTTNG_ERR_FATAL;
		break;
	case -EINVAL:
		ret = LTTNG_ERR_UST_CONTEXT_INVAL;
		break;
	case -ENOSYS:
		ret = LTTNG_ERR_UNKNOWN_DOMAIN;
		break;
	default:
		if (ret != 0 && ret != LTTNG_OK) {
			ret = ret > 0 ? ret : LTTNG_ERR_UNK;
		} else {
			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.
df3c77c8 JG	37	*
df3c77c8 JG	38	* Assumes the ownership of kctx.
b579acd9 DG	39	*/
b579acd9 DG	40	static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
645328ae	41	struct ltt_kernel_context *kctx)
b579acd9	42	{
601d5acf	43	int ret;
b579acd9 DG	44	struct ltt_kernel_channel *kchan;
b579acd9 DG	45
0525e9ae DG	46	assert(ksession);
	47	assert(kctx);
	48
601d5acf	49	DBG("Adding kernel context to all channels");
b579acd9 DG	50
	51	/* Go over all channels */
	52	cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) {
df3c77c8 JG	53	struct ltt_kernel_context *kctx_copy;
	54
	55	kctx_copy = trace_kernel_copy_context(kctx);
	56	if (!kctx_copy) {
	57	PERROR("zmalloc ltt_kernel_context");
7682f304	58	ret = -LTTNG_ERR_NOMEM;
df3c77c8 JG	59	goto error;
	60	}
	61
	62	/* Ownership of kctx_copy is transferred to the callee. */
	63	ret = kernel_add_channel_context(kchan, kctx_copy);
	64	kctx_copy = NULL;
1ae5e83e	65	if (ret != 0) {
601d5acf	66	goto error;
b579acd9 DG	67	}
	68	}
	69
f73fabfd	70	ret = LTTNG_OK;
b579acd9 DG	71
b579acd9 DG	72	error:
df3c77c8	73	trace_kernel_destroy_context(kctx);
b579acd9 DG	74	return ret;
	75	}
	76
	77	/*
	78	* Add kernel context to a specific channel.
df3c77c8 JG	79	*
df3c77c8 JG	80	* Assumes the ownership of kctx.
b579acd9	81	*/
645328ae	82	static int add_kctx_to_channel(struct ltt_kernel_context *kctx,
601d5acf	83	struct ltt_kernel_channel *kchan)
b579acd9	84	{
601d5acf	85	int ret;
b579acd9	86
0525e9ae DG	87	assert(kchan);
	88	assert(kctx);
	89
601d5acf	90	DBG("Add kernel context to channel '%s'", kchan->channel->name);
b579acd9	91
df3c77c8	92	/* Ownership of kctx is transferred to the callee. */
601d5acf	93	ret = kernel_add_channel_context(kchan, kctx);
df3c77c8	94	kctx = NULL;
1ae5e83e	95	if (ret != 0) {
b579acd9 DG	96	goto error;
	97	}
	98
f73fabfd	99	ret = LTTNG_OK;
b579acd9 DG	100
	101	error:
	102	return ret;
	103	}
	104
6b79ed20 DG	105	/*
	106	* Add UST context to channel.
	107	*/
4ce7709b JG	108	static int add_uctx_to_channel(struct ltt_ust_session *usess,
4ce7709b JG	109	enum lttng_domain_type domain,
df4f5a87 JG	110	struct ltt_ust_channel *uchan,
df4f5a87 JG	111	const struct lttng_event_context *ctx)
6b79ed20 DG	112	{
6b79ed20 DG	113	int ret;
bdf64013	114	struct ltt_ust_context *uctx = NULL;
6b79ed20	115
0525e9ae DG	116	assert(usess);
	117	assert(uchan);
	118	assert(ctx);
	119
aa3514e9 MD	120	/* Check if context is duplicate */
	121	cds_list_for_each_entry(uctx, &uchan->ctx_list, list) {
	122	if (trace_ust_match_context(uctx, ctx)) {
7682f304	123	ret = LTTNG_ERR_UST_CONTEXT_EXIST;
aa3514e9 MD	124	goto duplicate;
	125	}
	126	}
bdf64013 JG	127	uctx = NULL;
	128
	129	switch (domain) {
	130	case LTTNG_DOMAIN_JUL:
	131	case LTTNG_DOMAIN_LOG4J:
	132	{
442f8c07 JG	133	struct agent *agt;
	134
	135	if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
	136	/* Other contexts are not needed by the agent. */
	137	break;
	138	}
	139	agt = trace_ust_find_agent(usess, domain);
bdf64013 JG	140
	141	if (!agt) {
	142	agt = agent_create(domain);
	143	if (!agt) {
7682f304	144	ret = -LTTNG_ERR_NOMEM;
bdf64013 JG	145	goto error;
	146	}
	147	agent_add(agt, usess->agents);
	148	}
	149	ret = agent_add_context(ctx, agt);
	150	if (ret != LTTNG_OK) {
	151	goto error;
	152	}
	153
	154	ret = agent_enable_context(ctx, domain);
	155	if (ret != LTTNG_OK) {
	156	goto error;
	157	}
	158	break;
	159	}
	160	case LTTNG_DOMAIN_UST:
	161	break;
	162	default:
	163	assert(0);
	164	}
aa3514e9	165
6b79ed20 DG	166	/* Create ltt UST context */
	167	uctx = trace_ust_create_context(ctx);
	168	if (uctx == NULL) {
7682f304	169	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
6b79ed20 DG	170	goto error;
	171	}
	172
6b79ed20	173	/* Add ltt UST context node to ltt UST channel */
aa3514e9	174	lttng_ht_add_ulong(uchan->ctx, &uctx->node);
31746f93	175	cds_list_add_tail(&uctx->list, &uchan->ctx_list);
6b79ed20	176
88e3c2f5 JG	177	if (!usess->active) {
	178	goto end;
	179	}
	180
	181	ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
	182	if (ret < 0) {
	183	goto error;
	184	}
	185	end:
727d5404 DG	186	DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
	187
	188	return 0;
6b79ed20 DG	189
	190	error:
	191	free(uctx);
aa3514e9	192	duplicate:
6b79ed20 DG	193	return ret;
	194	}
	195
b579acd9 DG	196	/*
	197	* Add kernel context to tracer.
	198	*/
54d01ffb	199	int context_kernel_add(struct ltt_kernel_session *ksession,
df4f5a87	200	const struct lttng_event_context ctx, char channel_name)
b579acd9 DG	201	{
	202	int ret;
	203	struct ltt_kernel_channel *kchan;
645328ae	204	struct ltt_kernel_context *kctx;
54d01ffb	205
0525e9ae DG	206	assert(ksession);
	207	assert(ctx);
	208	assert(channel_name);
	209
645328ae DG	210	kctx = trace_kernel_create_context(NULL);
645328ae DG	211	if (!kctx) {
7682f304	212	ret = -LTTNG_ERR_NOMEM;
645328ae DG	213	goto error;
	214	}
	215
54d01ffb	216	/* Setup kernel context structure */
9197c5c4 MD	217	switch (ctx->ctx) {
9197c5c4 MD	218	case LTTNG_EVENT_CONTEXT_PID:
645328ae	219	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID;
9197c5c4	220	break;
9197c5c4	221	case LTTNG_EVENT_CONTEXT_PROCNAME:
645328ae	222	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PROCNAME;
9197c5c4 MD	223	break;
9197c5c4 MD	224	case LTTNG_EVENT_CONTEXT_PRIO:
645328ae	225	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PRIO;
9197c5c4 MD	226	break;
9197c5c4 MD	227	case LTTNG_EVENT_CONTEXT_NICE:
645328ae	228	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NICE;
9197c5c4 MD	229	break;
9197c5c4 MD	230	case LTTNG_EVENT_CONTEXT_VPID:
645328ae	231	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPID;
9197c5c4 MD	232	break;
9197c5c4 MD	233	case LTTNG_EVENT_CONTEXT_TID:
645328ae	234	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_TID;
9197c5c4 MD	235	break;
9197c5c4 MD	236	case LTTNG_EVENT_CONTEXT_VTID:
645328ae	237	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VTID;
9197c5c4 MD	238	break;
9197c5c4 MD	239	case LTTNG_EVENT_CONTEXT_PPID:
645328ae	240	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PPID;
9197c5c4 MD	241	break;
9197c5c4 MD	242	case LTTNG_EVENT_CONTEXT_VPPID:
645328ae	243	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VPPID;
9197c5c4	244	break;
54773d68	245	case LTTNG_EVENT_CONTEXT_HOSTNAME:
645328ae	246	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_HOSTNAME;
54773d68	247	break;
aa3514e9 MD	248	case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
aa3514e9 MD	249	case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
645328ae	250	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER;
aa3514e9	251	break;
1ae5e83e JD	252	case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
	253	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE;
	254	break;
	255	case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
	256	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PREEMPTIBLE;
	257	break;
	258	case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
	259	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE;
	260	break;
	261	case LTTNG_EVENT_CONTEXT_MIGRATABLE:
	262	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MIGRATABLE;
	263	break;
373148e9 FG	264	case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
	265	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL;
	266	break;
	267	case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
	268	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CALLSTACK_USER;
	269	break;
40e14884 MJ	270	case LTTNG_EVENT_CONTEXT_CGROUP_NS:
	271	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_CGROUP_NS;
	272	break;
	273	case LTTNG_EVENT_CONTEXT_IPC_NS:
	274	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_IPC_NS;
	275	break;
	276	case LTTNG_EVENT_CONTEXT_MNT_NS:
	277	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_MNT_NS;
	278	break;
	279	case LTTNG_EVENT_CONTEXT_NET_NS:
	280	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_NET_NS;
	281	break;
	282	case LTTNG_EVENT_CONTEXT_PID_NS:
	283	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_PID_NS;
	284	break;
	285	case LTTNG_EVENT_CONTEXT_USER_NS:
	286	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_USER_NS;
	287	break;
	288	case LTTNG_EVENT_CONTEXT_UTS_NS:
	289	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UTS_NS;
	290	break;
499cbfa1 MJ	291	case LTTNG_EVENT_CONTEXT_UID:
	292	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_UID;
	293	break;
	294	case LTTNG_EVENT_CONTEXT_EUID:
	295	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EUID;
	296	break;
	297	case LTTNG_EVENT_CONTEXT_SUID:
	298	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SUID;
	299	break;
	300	case LTTNG_EVENT_CONTEXT_GID:
	301	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_GID;
	302	break;
	303	case LTTNG_EVENT_CONTEXT_EGID:
	304	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_EGID;
	305	break;
	306	case LTTNG_EVENT_CONTEXT_SGID:
	307	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_SGID;
	308	break;
	309	case LTTNG_EVENT_CONTEXT_VUID:
	310	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VUID;
	311	break;
	312	case LTTNG_EVENT_CONTEXT_VEUID:
	313	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEUID;
	314	break;
	315	case LTTNG_EVENT_CONTEXT_VSUID:
	316	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSUID;
	317	break;
	318	case LTTNG_EVENT_CONTEXT_VGID:
	319	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VGID;
	320	break;
	321	case LTTNG_EVENT_CONTEXT_VEGID:
	322	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VEGID;
	323	break;
	324	case LTTNG_EVENT_CONTEXT_VSGID:
	325	kctx->ctx.ctx = LTTNG_KERNEL_CONTEXT_VSGID;
	326	break;
9197c5c4	327	default:
fc7324e8 DG	328	ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
fc7324e8 DG	329	goto error;
9197c5c4 MD	330	}
9197c5c4 MD	331
645328ae DG	332	kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
	333	kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
	334	strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name,
54d01ffb	335	LTTNG_SYMBOL_NAME_LEN);
645328ae	336	kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
b579acd9	337
9d035200	338	if (*channel_name == '\0') {
645328ae	339	ret = add_kctx_all_channels(ksession, kctx);
df3c77c8 JG	340	/* Ownership of kctx is transferred to the callee. */
df3c77c8 JG	341	kctx = NULL;
f73fabfd	342	if (ret != LTTNG_OK) {
b579acd9 DG	343	goto error;
	344	}
	345	} else {
	346	/* Get kernel channel */
62499ad6	347	kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
b579acd9	348	if (kchan == NULL) {
f73fabfd	349	ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
b579acd9 DG	350	goto error;
	351	}
	352
645328ae	353	ret = add_kctx_to_channel(kctx, kchan);
df3c77c8 JG	354	/* Ownership of kctx is transferred to the callee. */
df3c77c8 JG	355	kctx = NULL;
f73fabfd	356	if (ret != LTTNG_OK) {
b579acd9 DG	357	goto error;
	358	}
	359	}
	360
df3c77c8	361	ret = LTTNG_OK;
b579acd9 DG	362
b579acd9 DG	363	error:
fc7324e8 DG	364	if (kctx) {
	365	trace_kernel_destroy_context(kctx);
	366	}
b579acd9 DG	367	return ret;
b579acd9 DG	368	}
2bdd86d4 MD	369
2bdd86d4 MD	370	/*
55cc08a6	371	* Add UST context to tracer.
2bdd86d4	372	*/
4ce7709b	373	int context_ust_add(struct ltt_ust_session *usess,
df4f5a87 JG	374	enum lttng_domain_type domain,
df4f5a87 JG	375	const struct lttng_event_context *ctx,
4ce7709b	376	char *channel_name)
2bdd86d4	377	{
601d5acf	378	int ret = LTTNG_OK;
442359c0	379	struct lttng_ht_iter iter;
bec39940	380	struct lttng_ht *chan_ht;
55cc08a6	381	struct ltt_ust_channel *uchan = NULL;
2bdd86d4	382
0525e9ae DG	383	assert(usess);
	384	assert(ctx);
	385	assert(channel_name);
	386
2223c96f DG	387	rcu_read_lock();
2223c96f DG	388
f5501dad	389	chan_ht = usess->domain_global.channels;
2bdd86d4	390
55cc08a6	391	/* Get UST channel if defined */
9f9ee9c9	392	if (channel_name[0] != '\0') {
55cc08a6 DG	393	uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
55cc08a6 DG	394	if (uchan == NULL) {
f73fabfd	395	ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
2bdd86d4 MD	396	goto error;
2bdd86d4 MD	397	}
55cc08a6 DG	398	}
55cc08a6 DG	399
601d5acf DG	400	if (uchan) {
601d5acf DG	401	/* Add ctx to channel */
6b79ed20	402	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
601d5acf	403	} else {
e7fe706f	404	rcu_read_lock();
601d5acf	405	/* Add ctx all events, all channels */
bec39940	406	cds_lfht_for_each_entry(chan_ht->ht, &iter.iter, uchan, node.node) {
6b79ed20	407	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
7682f304	408	if (ret) {
9589be74 JG	409	ERR("Failed to add context to channel %s",
9589be74 JG	410	uchan->name);
55cc08a6 DG	411	continue;
55cc08a6 DG	412	}
2bdd86d4	413	}
e7fe706f	414	rcu_read_unlock();
55cc08a6	415	}
2bdd86d4	416
55cc08a6	417	switch (ret) {
7682f304	418	case LTTNG_ERR_UST_CONTEXT_EXIST:
727d5404	419	break;
55cc08a6	420	case -ENOMEM:
7682f304	421	case -LTTNG_ERR_NOMEM:
f73fabfd	422	ret = LTTNG_ERR_FATAL;
727d5404 DG	423	break;
727d5404 DG	424	case -EINVAL:
f73fabfd	425	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
727d5404 DG	426	break;
727d5404 DG	427	case -ENOSYS:
f73fabfd	428	ret = LTTNG_ERR_UNKNOWN_DOMAIN;
727d5404 DG	429	break;
727d5404 DG	430	default:
7682f304 JG	431	if (ret != 0 && ret != LTTNG_OK) {
	432	ret = ret > 0 ? ret : LTTNG_ERR_UNK;
	433	} else {
	434	ret = LTTNG_OK;
	435	}
727d5404	436	break;
2bdd86d4 MD	437	}
2bdd86d4 MD	438
2bdd86d4	439	error:
2223c96f	440	rcu_read_unlock();
2bdd86d4 MD	441	return ret;
2bdd86d4 MD	442	}