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

/*
 * Copyright (C) 2011 EfficiOS Inc.
 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#define _LGPL_SOURCE
#include "agent.hpp"
#include "context.hpp"
#include "kernel.hpp"
#include "trace-ust.hpp"
#include "ust-app.hpp"

#include <common/error.hpp>
#include <common/sessiond-comm/sessiond-comm.hpp>
#include <common/urcu.hpp>

#include <stdio.h>
#include <unistd.h>
#include <urcu/list.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;

	LTTNG_ASSERT(ksession);
	LTTNG_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 = nullptr;
		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;

	LTTNG_ASSERT(kchan);
	LTTNG_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 = nullptr;
	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 = nullptr;

	LTTNG_ASSERT(usess);
	LTTNG_ASSERT(uchan);
	LTTNG_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 = nullptr;

	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:
		abort();
	}

	/* Create ltt UST context */
	uctx = trace_ust_create_context(ctx);
	if (uctx == nullptr) {
		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,
		       const char *channel_name)
{
	int ret;
	struct ltt_kernel_channel *kchan;
	struct ltt_kernel_context *kctx;

	LTTNG_ASSERT(ksession);
	LTTNG_ASSERT(ctx);
	LTTNG_ASSERT(channel_name);

	kctx = trace_kernel_create_context(nullptr);
	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_ABI_CONTEXT_PID;
		break;
	case LTTNG_EVENT_CONTEXT_PROCNAME:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PROCNAME;
		break;
	case LTTNG_EVENT_CONTEXT_PRIO:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PRIO;
		break;
	case LTTNG_EVENT_CONTEXT_NICE:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NICE;
		break;
	case LTTNG_EVENT_CONTEXT_VPID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPID;
		break;
	case LTTNG_EVENT_CONTEXT_TID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TID;
		break;
	case LTTNG_EVENT_CONTEXT_VTID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VTID;
		break;
	case LTTNG_EVENT_CONTEXT_PPID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PPID;
		break;
	case LTTNG_EVENT_CONTEXT_VPPID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPPID;
		break;
	case LTTNG_EVENT_CONTEXT_HOSTNAME:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME;
		break;
	case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
	case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER;
		break;
	case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE;
		break;
	case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE;
		break;
	case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE;
		break;
	case LTTNG_EVENT_CONTEXT_MIGRATABLE:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE;
		break;
	case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL;
		break;
	case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER;
		break;
	case LTTNG_EVENT_CONTEXT_CGROUP_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS;
		break;
	case LTTNG_EVENT_CONTEXT_IPC_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_IPC_NS;
		break;
	case LTTNG_EVENT_CONTEXT_MNT_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MNT_NS;
		break;
	case LTTNG_EVENT_CONTEXT_NET_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NET_NS;
		break;
	case LTTNG_EVENT_CONTEXT_PID_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID_NS;
		break;
	case LTTNG_EVENT_CONTEXT_TIME_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TIME_NS;
		break;
	case LTTNG_EVENT_CONTEXT_USER_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_USER_NS;
		break;
	case LTTNG_EVENT_CONTEXT_UTS_NS:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UTS_NS;
		break;
	case LTTNG_EVENT_CONTEXT_UID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UID;
		break;
	case LTTNG_EVENT_CONTEXT_EUID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EUID;
		break;
	case LTTNG_EVENT_CONTEXT_SUID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SUID;
		break;
	case LTTNG_EVENT_CONTEXT_GID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_GID;
		break;
	case LTTNG_EVENT_CONTEXT_EGID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EGID;
		break;
	case LTTNG_EVENT_CONTEXT_SGID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SGID;
		break;
	case LTTNG_EVENT_CONTEXT_VUID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VUID;
		break;
	case LTTNG_EVENT_CONTEXT_VEUID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEUID;
		break;
	case LTTNG_EVENT_CONTEXT_VSUID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSUID;
		break;
	case LTTNG_EVENT_CONTEXT_VGID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VGID;
		break;
	case LTTNG_EVENT_CONTEXT_VEGID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEGID;
		break;
	case LTTNG_EVENT_CONTEXT_VSGID:
		kctx->ctx.ctx = LTTNG_KERNEL_ABI_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 = nullptr;
		if (ret != LTTNG_OK) {
			goto error;
		}
	} else {
		/* Get kernel channel */
		kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
		if (kchan == nullptr) {
			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 = nullptr;
		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,
		    const char *channel_name)
{
	int ret = LTTNG_OK;
	struct lttng_ht_iter iter;
	struct lttng_ht *chan_ht;
	struct ltt_ust_channel *uchan = nullptr;

	LTTNG_ASSERT(usess);
	LTTNG_ASSERT(ctx);
	LTTNG_ASSERT(channel_name);

	lttng::urcu::read_lock_guard 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 == nullptr) {
			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 {
		/* 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;
			}
		}
	}

	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:
	return ret;
}
Commit	Line	Data
b579acd9	1	/*
21cf9b6b	2	* Copyright (C) 2011 EfficiOS Inc.
ab5be9fa	3	* Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
b579acd9	4	*
ab5be9fa	5	* SPDX-License-Identifier: GPL-2.0-only
b579acd9	6	*
b579acd9 DG	7	*/
b579acd9 DG	8
6c1c0768	9	#define _LGPL_SOURCE
28ab034a JG	10	#include "agent.hpp"
	11	#include "context.hpp"
	12	#include "kernel.hpp"
	13	#include "trace-ust.hpp"
	14	#include "ust-app.hpp"
	15
	16	#include <common/error.hpp>
	17	#include <common/sessiond-comm/sessiond-comm.hpp>
56047f5a	18	#include <common/urcu.hpp>
28ab034a	19
b579acd9	20	#include <stdio.h>
b579acd9	21	#include <unistd.h>
54d01ffb	22	#include <urcu/list.h>
1e307fab	23
b579acd9 DG	24	/*
b579acd9 DG	25	* Add kernel context to all channel.
df3c77c8 JG	26	*
df3c77c8 JG	27	* Assumes the ownership of kctx.
b579acd9 DG	28	*/
b579acd9 DG	29	static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
28ab034a	30	struct ltt_kernel_context *kctx)
b579acd9	31	{
601d5acf	32	int ret;
b579acd9 DG	33	struct ltt_kernel_channel *kchan;
b579acd9 DG	34
a0377dfe FD	35	LTTNG_ASSERT(ksession);
a0377dfe FD	36	LTTNG_ASSERT(kctx);
0525e9ae	37
601d5acf	38	DBG("Adding kernel context to all channels");
b579acd9 DG	39
b579acd9 DG	40	/* Go over all channels */
28ab034a	41	cds_list_for_each_entry (kchan, &ksession->channel_list.head, list) {
df3c77c8 JG	42	struct ltt_kernel_context *kctx_copy;
	43
	44	kctx_copy = trace_kernel_copy_context(kctx);
	45	if (!kctx_copy) {
	46	PERROR("zmalloc ltt_kernel_context");
7682f304	47	ret = -LTTNG_ERR_NOMEM;
df3c77c8 JG	48	goto error;
	49	}
	50
	51	/* Ownership of kctx_copy is transferred to the callee. */
	52	ret = kernel_add_channel_context(kchan, kctx_copy);
cd9adb8b	53	kctx_copy = nullptr;
1ae5e83e	54	if (ret != 0) {
601d5acf	55	goto error;
b579acd9 DG	56	}
	57	}
	58
f73fabfd	59	ret = LTTNG_OK;
b579acd9 DG	60
b579acd9 DG	61	error:
df3c77c8	62	trace_kernel_destroy_context(kctx);
b579acd9 DG	63	return ret;
	64	}
	65
	66	/*
	67	* Add kernel context to a specific channel.
df3c77c8 JG	68	*
df3c77c8 JG	69	* Assumes the ownership of kctx.
b579acd9	70	*/
28ab034a	71	static int add_kctx_to_channel(struct ltt_kernel_context kctx, struct ltt_kernel_channel kchan)
b579acd9	72	{
601d5acf	73	int ret;
b579acd9	74
a0377dfe FD	75	LTTNG_ASSERT(kchan);
a0377dfe FD	76	LTTNG_ASSERT(kctx);
0525e9ae	77
601d5acf	78	DBG("Add kernel context to channel '%s'", kchan->channel->name);
b579acd9	79
df3c77c8	80	/* Ownership of kctx is transferred to the callee. */
601d5acf	81	ret = kernel_add_channel_context(kchan, kctx);
cd9adb8b	82	kctx = nullptr;
1ae5e83e	83	if (ret != 0) {
b579acd9 DG	84	goto error;
	85	}
	86
f73fabfd	87	ret = LTTNG_OK;
b579acd9 DG	88
	89	error:
	90	return ret;
	91	}
	92
6b79ed20 DG	93	/*
	94	* Add UST context to channel.
	95	*/
4ce7709b	96	static int add_uctx_to_channel(struct ltt_ust_session *usess,
28ab034a JG	97	enum lttng_domain_type domain,
	98	struct ltt_ust_channel *uchan,
	99	const struct lttng_event_context *ctx)
6b79ed20 DG	100	{
6b79ed20 DG	101	int ret;
cd9adb8b	102	struct ltt_ust_context *uctx = nullptr;
6b79ed20	103
a0377dfe FD	104	LTTNG_ASSERT(usess);
	105	LTTNG_ASSERT(uchan);
	106	LTTNG_ASSERT(ctx);
0525e9ae	107
aa3514e9	108	/* Check if context is duplicate */
28ab034a	109	cds_list_for_each_entry (uctx, &uchan->ctx_list, list) {
aa3514e9	110	if (trace_ust_match_context(uctx, ctx)) {
7682f304	111	ret = LTTNG_ERR_UST_CONTEXT_EXIST;
aa3514e9 MD	112	goto duplicate;
	113	}
	114	}
cd9adb8b	115	uctx = nullptr;
bdf64013 JG	116
	117	switch (domain) {
	118	case LTTNG_DOMAIN_JUL:
	119	case LTTNG_DOMAIN_LOG4J:
	120	{
442f8c07 JG	121	struct agent *agt;
	122
	123	if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
	124	/* Other contexts are not needed by the agent. */
	125	break;
	126	}
	127	agt = trace_ust_find_agent(usess, domain);
bdf64013 JG	128
	129	if (!agt) {
	130	agt = agent_create(domain);
	131	if (!agt) {
7682f304	132	ret = -LTTNG_ERR_NOMEM;
bdf64013 JG	133	goto error;
	134	}
	135	agent_add(agt, usess->agents);
	136	}
	137	ret = agent_add_context(ctx, agt);
	138	if (ret != LTTNG_OK) {
	139	goto error;
	140	}
	141
	142	ret = agent_enable_context(ctx, domain);
	143	if (ret != LTTNG_OK) {
	144	goto error;
	145	}
	146	break;
	147	}
	148	case LTTNG_DOMAIN_UST:
	149	break;
	150	default:
a0377dfe	151	abort();
bdf64013	152	}
aa3514e9	153
6b79ed20 DG	154	/* Create ltt UST context */
6b79ed20 DG	155	uctx = trace_ust_create_context(ctx);
cd9adb8b	156	if (uctx == nullptr) {
7682f304	157	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
6b79ed20 DG	158	goto error;
	159	}
	160
6b79ed20	161	/* Add ltt UST context node to ltt UST channel */
aa3514e9	162	lttng_ht_add_ulong(uchan->ctx, &uctx->node);
31746f93	163	cds_list_add_tail(&uctx->list, &uchan->ctx_list);
6b79ed20	164
88e3c2f5 JG	165	if (!usess->active) {
	166	goto end;
	167	}
	168
	169	ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
	170	if (ret < 0) {
	171	goto error;
	172	}
	173	end:
727d5404 DG	174	DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
	175
	176	return 0;
6b79ed20 DG	177
	178	error:
	179	free(uctx);
aa3514e9	180	duplicate:
6b79ed20 DG	181	return ret;
	182	}
	183
b579acd9 DG	184	/*
	185	* Add kernel context to tracer.
	186	*/
54d01ffb	187	int context_kernel_add(struct ltt_kernel_session *ksession,
28ab034a JG	188	const struct lttng_event_context *ctx,
28ab034a JG	189	const char *channel_name)
b579acd9 DG	190	{
	191	int ret;
	192	struct ltt_kernel_channel *kchan;
645328ae	193	struct ltt_kernel_context *kctx;
54d01ffb	194
a0377dfe FD	195	LTTNG_ASSERT(ksession);
	196	LTTNG_ASSERT(ctx);
	197	LTTNG_ASSERT(channel_name);
0525e9ae	198
cd9adb8b	199	kctx = trace_kernel_create_context(nullptr);
645328ae	200	if (!kctx) {
7682f304	201	ret = -LTTNG_ERR_NOMEM;
645328ae DG	202	goto error;
	203	}
	204
54d01ffb	205	/* Setup kernel context structure */
9197c5c4 MD	206	switch (ctx->ctx) {
9197c5c4 MD	207	case LTTNG_EVENT_CONTEXT_PID:
b8e2fb80	208	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID;
9197c5c4	209	break;
9197c5c4	210	case LTTNG_EVENT_CONTEXT_PROCNAME:
b8e2fb80	211	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PROCNAME;
9197c5c4 MD	212	break;
9197c5c4 MD	213	case LTTNG_EVENT_CONTEXT_PRIO:
b8e2fb80	214	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PRIO;
9197c5c4 MD	215	break;
9197c5c4 MD	216	case LTTNG_EVENT_CONTEXT_NICE:
b8e2fb80	217	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NICE;
9197c5c4 MD	218	break;
9197c5c4 MD	219	case LTTNG_EVENT_CONTEXT_VPID:
b8e2fb80	220	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPID;
9197c5c4 MD	221	break;
9197c5c4 MD	222	case LTTNG_EVENT_CONTEXT_TID:
b8e2fb80	223	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TID;
9197c5c4 MD	224	break;
9197c5c4 MD	225	case LTTNG_EVENT_CONTEXT_VTID:
b8e2fb80	226	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VTID;
9197c5c4 MD	227	break;
9197c5c4 MD	228	case LTTNG_EVENT_CONTEXT_PPID:
b8e2fb80	229	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PPID;
9197c5c4 MD	230	break;
9197c5c4 MD	231	case LTTNG_EVENT_CONTEXT_VPPID:
b8e2fb80	232	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPPID;
9197c5c4	233	break;
54773d68	234	case LTTNG_EVENT_CONTEXT_HOSTNAME:
b8e2fb80	235	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME;
54773d68	236	break;
aa3514e9 MD	237	case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
aa3514e9 MD	238	case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
b8e2fb80	239	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER;
aa3514e9	240	break;
1ae5e83e	241	case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
b8e2fb80	242	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE;
1ae5e83e JD	243	break;
1ae5e83e JD	244	case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
b8e2fb80	245	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE;
1ae5e83e JD	246	break;
1ae5e83e JD	247	case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
b8e2fb80	248	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE;
1ae5e83e JD	249	break;
1ae5e83e JD	250	case LTTNG_EVENT_CONTEXT_MIGRATABLE:
b8e2fb80	251	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE;
1ae5e83e	252	break;
373148e9	253	case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
b8e2fb80	254	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL;
373148e9 FG	255	break;
373148e9 FG	256	case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
b8e2fb80	257	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER;
373148e9	258	break;
40e14884	259	case LTTNG_EVENT_CONTEXT_CGROUP_NS:
b8e2fb80	260	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS;
40e14884 MJ	261	break;
40e14884 MJ	262	case LTTNG_EVENT_CONTEXT_IPC_NS:
b8e2fb80	263	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_IPC_NS;
40e14884 MJ	264	break;
40e14884 MJ	265	case LTTNG_EVENT_CONTEXT_MNT_NS:
b8e2fb80	266	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MNT_NS;
40e14884 MJ	267	break;
40e14884 MJ	268	case LTTNG_EVENT_CONTEXT_NET_NS:
b8e2fb80	269	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NET_NS;
40e14884 MJ	270	break;
40e14884 MJ	271	case LTTNG_EVENT_CONTEXT_PID_NS:
b8e2fb80	272	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID_NS;
40e14884	273	break;
d37ac3cd	274	case LTTNG_EVENT_CONTEXT_TIME_NS:
b8e2fb80	275	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TIME_NS;
d37ac3cd	276	break;
40e14884	277	case LTTNG_EVENT_CONTEXT_USER_NS:
b8e2fb80	278	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_USER_NS;
40e14884 MJ	279	break;
40e14884 MJ	280	case LTTNG_EVENT_CONTEXT_UTS_NS:
b8e2fb80	281	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UTS_NS;
40e14884	282	break;
499cbfa1	283	case LTTNG_EVENT_CONTEXT_UID:
b8e2fb80	284	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UID;
499cbfa1 MJ	285	break;
499cbfa1 MJ	286	case LTTNG_EVENT_CONTEXT_EUID:
b8e2fb80	287	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EUID;
499cbfa1 MJ	288	break;
499cbfa1 MJ	289	case LTTNG_EVENT_CONTEXT_SUID:
b8e2fb80	290	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SUID;
499cbfa1 MJ	291	break;
499cbfa1 MJ	292	case LTTNG_EVENT_CONTEXT_GID:
b8e2fb80	293	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_GID;
499cbfa1 MJ	294	break;
499cbfa1 MJ	295	case LTTNG_EVENT_CONTEXT_EGID:
b8e2fb80	296	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EGID;
499cbfa1 MJ	297	break;
499cbfa1 MJ	298	case LTTNG_EVENT_CONTEXT_SGID:
b8e2fb80	299	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SGID;
499cbfa1 MJ	300	break;
499cbfa1 MJ	301	case LTTNG_EVENT_CONTEXT_VUID:
b8e2fb80	302	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VUID;
499cbfa1 MJ	303	break;
499cbfa1 MJ	304	case LTTNG_EVENT_CONTEXT_VEUID:
b8e2fb80	305	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEUID;
499cbfa1 MJ	306	break;
499cbfa1 MJ	307	case LTTNG_EVENT_CONTEXT_VSUID:
b8e2fb80	308	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSUID;
499cbfa1 MJ	309	break;
499cbfa1 MJ	310	case LTTNG_EVENT_CONTEXT_VGID:
b8e2fb80	311	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VGID;
499cbfa1 MJ	312	break;
499cbfa1 MJ	313	case LTTNG_EVENT_CONTEXT_VEGID:
b8e2fb80	314	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEGID;
499cbfa1 MJ	315	break;
499cbfa1 MJ	316	case LTTNG_EVENT_CONTEXT_VSGID:
b8e2fb80	317	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSGID;
499cbfa1	318	break;
9197c5c4	319	default:
fc7324e8 DG	320	ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
fc7324e8 DG	321	goto error;
9197c5c4 MD	322	}
9197c5c4 MD	323
645328ae DG	324	kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
645328ae DG	325	kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
28ab034a	326	strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, LTTNG_SYMBOL_NAME_LEN);
645328ae	327	kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
b579acd9	328
9d035200	329	if (*channel_name == '\0') {
645328ae	330	ret = add_kctx_all_channels(ksession, kctx);
df3c77c8	331	/* Ownership of kctx is transferred to the callee. */
cd9adb8b	332	kctx = nullptr;
f73fabfd	333	if (ret != LTTNG_OK) {
b579acd9 DG	334	goto error;
	335	}
	336	} else {
	337	/* Get kernel channel */
62499ad6	338	kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
cd9adb8b	339	if (kchan == nullptr) {
f73fabfd	340	ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
b579acd9 DG	341	goto error;
	342	}
	343
645328ae	344	ret = add_kctx_to_channel(kctx, kchan);
df3c77c8	345	/* Ownership of kctx is transferred to the callee. */
cd9adb8b	346	kctx = nullptr;
f73fabfd	347	if (ret != LTTNG_OK) {
b579acd9 DG	348	goto error;
	349	}
	350	}
	351
df3c77c8	352	ret = LTTNG_OK;
b579acd9 DG	353
b579acd9 DG	354	error:
fc7324e8 DG	355	if (kctx) {
	356	trace_kernel_destroy_context(kctx);
	357	}
b579acd9 DG	358	return ret;
b579acd9 DG	359	}
2bdd86d4 MD	360
2bdd86d4 MD	361	/*
55cc08a6	362	* Add UST context to tracer.
2bdd86d4	363	*/
4ce7709b	364	int context_ust_add(struct ltt_ust_session *usess,
28ab034a JG	365	enum lttng_domain_type domain,
	366	const struct lttng_event_context *ctx,
	367	const char *channel_name)
2bdd86d4	368	{
601d5acf	369	int ret = LTTNG_OK;
442359c0	370	struct lttng_ht_iter iter;
bec39940	371	struct lttng_ht *chan_ht;
cd9adb8b	372	struct ltt_ust_channel *uchan = nullptr;
2bdd86d4	373
a0377dfe FD	374	LTTNG_ASSERT(usess);
	375	LTTNG_ASSERT(ctx);
	376	LTTNG_ASSERT(channel_name);
0525e9ae	377
56047f5a	378	lttng::urcu::read_lock_guard read_lock;
2223c96f	379
f5501dad	380	chan_ht = usess->domain_global.channels;
2bdd86d4	381
55cc08a6	382	/* Get UST channel if defined */
9f9ee9c9	383	if (channel_name[0] != '\0') {
55cc08a6	384	uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
cd9adb8b	385	if (uchan == nullptr) {
f73fabfd	386	ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
2bdd86d4 MD	387	goto error;
2bdd86d4 MD	388	}
55cc08a6 DG	389	}
55cc08a6 DG	390
601d5acf DG	391	if (uchan) {
601d5acf DG	392	/* Add ctx to channel */
6b79ed20	393	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
601d5acf DG	394	} else {
601d5acf DG	395	/* Add ctx all events, all channels */
28ab034a	396	cds_lfht_for_each_entry (chan_ht->ht, &iter.iter, uchan, node.node) {
6b79ed20	397	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
7682f304	398	if (ret) {
28ab034a	399	ERR("Failed to add context to channel %s", uchan->name);
55cc08a6 DG	400	continue;
55cc08a6 DG	401	}
2bdd86d4	402	}
55cc08a6	403	}
2bdd86d4	404
55cc08a6	405	switch (ret) {
7682f304	406	case LTTNG_ERR_UST_CONTEXT_EXIST:
727d5404	407	break;
55cc08a6	408	case -ENOMEM:
7682f304	409	case -LTTNG_ERR_NOMEM:
f73fabfd	410	ret = LTTNG_ERR_FATAL;
727d5404 DG	411	break;
727d5404 DG	412	case -EINVAL:
f73fabfd	413	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
727d5404 DG	414	break;
727d5404 DG	415	case -ENOSYS:
f73fabfd	416	ret = LTTNG_ERR_UNKNOWN_DOMAIN;
727d5404 DG	417	break;
727d5404 DG	418	default:
7682f304 JG	419	if (ret != 0 && ret != LTTNG_OK) {
	420	ret = ret > 0 ? ret : LTTNG_ERR_UNK;
	421	} else {
	422	ret = LTTNG_OK;
	423	}
727d5404	424	break;
2bdd86d4 MD	425	}
2bdd86d4 MD	426
2bdd86d4 MD	427	error:
	428	return ret;
	429	}