[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 <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);

	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 == 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 {
		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	/*
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>
	18
b579acd9	19	#include <stdio.h>
b579acd9	20	#include <unistd.h>
54d01ffb	21	#include <urcu/list.h>
1e307fab	22
b579acd9 DG	23	/*
b579acd9 DG	24	* Add kernel context to all channel.
df3c77c8 JG	25	*
df3c77c8 JG	26	* Assumes the ownership of kctx.
b579acd9 DG	27	*/
b579acd9 DG	28	static int add_kctx_all_channels(struct ltt_kernel_session *ksession,
28ab034a	29	struct ltt_kernel_context *kctx)
b579acd9	30	{
601d5acf	31	int ret;
b579acd9 DG	32	struct ltt_kernel_channel *kchan;
b579acd9 DG	33
a0377dfe FD	34	LTTNG_ASSERT(ksession);
a0377dfe FD	35	LTTNG_ASSERT(kctx);
0525e9ae	36
601d5acf	37	DBG("Adding kernel context to all channels");
b579acd9 DG	38
b579acd9 DG	39	/* Go over all channels */
28ab034a	40	cds_list_for_each_entry (kchan, &ksession->channel_list.head, list) {
df3c77c8 JG	41	struct ltt_kernel_context *kctx_copy;
	42
	43	kctx_copy = trace_kernel_copy_context(kctx);
	44	if (!kctx_copy) {
	45	PERROR("zmalloc ltt_kernel_context");
7682f304	46	ret = -LTTNG_ERR_NOMEM;
df3c77c8 JG	47	goto error;
	48	}
	49
	50	/* Ownership of kctx_copy is transferred to the callee. */
	51	ret = kernel_add_channel_context(kchan, kctx_copy);
cd9adb8b	52	kctx_copy = nullptr;
1ae5e83e	53	if (ret != 0) {
601d5acf	54	goto error;
b579acd9 DG	55	}
	56	}
	57
f73fabfd	58	ret = LTTNG_OK;
b579acd9 DG	59
b579acd9 DG	60	error:
df3c77c8	61	trace_kernel_destroy_context(kctx);
b579acd9 DG	62	return ret;
	63	}
	64
	65	/*
	66	* Add kernel context to a specific channel.
df3c77c8 JG	67	*
df3c77c8 JG	68	* Assumes the ownership of kctx.
b579acd9	69	*/
28ab034a	70	static int add_kctx_to_channel(struct ltt_kernel_context kctx, struct ltt_kernel_channel kchan)
b579acd9	71	{
601d5acf	72	int ret;
b579acd9	73
a0377dfe FD	74	LTTNG_ASSERT(kchan);
a0377dfe FD	75	LTTNG_ASSERT(kctx);
0525e9ae	76
601d5acf	77	DBG("Add kernel context to channel '%s'", kchan->channel->name);
b579acd9	78
df3c77c8	79	/* Ownership of kctx is transferred to the callee. */
601d5acf	80	ret = kernel_add_channel_context(kchan, kctx);
cd9adb8b	81	kctx = nullptr;
1ae5e83e	82	if (ret != 0) {
b579acd9 DG	83	goto error;
	84	}
	85
f73fabfd	86	ret = LTTNG_OK;
b579acd9 DG	87
	88	error:
	89	return ret;
	90	}
	91
6b79ed20 DG	92	/*
	93	* Add UST context to channel.
	94	*/
4ce7709b	95	static int add_uctx_to_channel(struct ltt_ust_session *usess,
28ab034a JG	96	enum lttng_domain_type domain,
	97	struct ltt_ust_channel *uchan,
	98	const struct lttng_event_context *ctx)
6b79ed20 DG	99	{
6b79ed20 DG	100	int ret;
cd9adb8b	101	struct ltt_ust_context *uctx = nullptr;
6b79ed20	102
a0377dfe FD	103	LTTNG_ASSERT(usess);
	104	LTTNG_ASSERT(uchan);
	105	LTTNG_ASSERT(ctx);
0525e9ae	106
aa3514e9	107	/* Check if context is duplicate */
28ab034a	108	cds_list_for_each_entry (uctx, &uchan->ctx_list, list) {
aa3514e9	109	if (trace_ust_match_context(uctx, ctx)) {
7682f304	110	ret = LTTNG_ERR_UST_CONTEXT_EXIST;
aa3514e9 MD	111	goto duplicate;
	112	}
	113	}
cd9adb8b	114	uctx = nullptr;
bdf64013 JG	115
	116	switch (domain) {
	117	case LTTNG_DOMAIN_JUL:
	118	case LTTNG_DOMAIN_LOG4J:
	119	{
442f8c07 JG	120	struct agent *agt;
	121
	122	if (ctx->ctx != LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
	123	/* Other contexts are not needed by the agent. */
	124	break;
	125	}
	126	agt = trace_ust_find_agent(usess, domain);
bdf64013 JG	127
	128	if (!agt) {
	129	agt = agent_create(domain);
	130	if (!agt) {
7682f304	131	ret = -LTTNG_ERR_NOMEM;
bdf64013 JG	132	goto error;
	133	}
	134	agent_add(agt, usess->agents);
	135	}
	136	ret = agent_add_context(ctx, agt);
	137	if (ret != LTTNG_OK) {
	138	goto error;
	139	}
	140
	141	ret = agent_enable_context(ctx, domain);
	142	if (ret != LTTNG_OK) {
	143	goto error;
	144	}
	145	break;
	146	}
	147	case LTTNG_DOMAIN_UST:
	148	break;
	149	default:
a0377dfe	150	abort();
bdf64013	151	}
aa3514e9	152
6b79ed20 DG	153	/* Create ltt UST context */
6b79ed20 DG	154	uctx = trace_ust_create_context(ctx);
cd9adb8b	155	if (uctx == nullptr) {
7682f304	156	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
6b79ed20 DG	157	goto error;
	158	}
	159
6b79ed20	160	/* Add ltt UST context node to ltt UST channel */
aa3514e9	161	lttng_ht_add_ulong(uchan->ctx, &uctx->node);
31746f93	162	cds_list_add_tail(&uctx->list, &uchan->ctx_list);
6b79ed20	163
88e3c2f5 JG	164	if (!usess->active) {
	165	goto end;
	166	}
	167
	168	ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
	169	if (ret < 0) {
	170	goto error;
	171	}
	172	end:
727d5404 DG	173	DBG("Context UST %d added to channel %s", uctx->ctx.ctx, uchan->name);
	174
	175	return 0;
6b79ed20 DG	176
	177	error:
	178	free(uctx);
aa3514e9	179	duplicate:
6b79ed20 DG	180	return ret;
	181	}
	182
b579acd9 DG	183	/*
	184	* Add kernel context to tracer.
	185	*/
54d01ffb	186	int context_kernel_add(struct ltt_kernel_session *ksession,
28ab034a JG	187	const struct lttng_event_context *ctx,
28ab034a JG	188	const char *channel_name)
b579acd9 DG	189	{
	190	int ret;
	191	struct ltt_kernel_channel *kchan;
645328ae	192	struct ltt_kernel_context *kctx;
54d01ffb	193
a0377dfe FD	194	LTTNG_ASSERT(ksession);
	195	LTTNG_ASSERT(ctx);
	196	LTTNG_ASSERT(channel_name);
0525e9ae	197
cd9adb8b	198	kctx = trace_kernel_create_context(nullptr);
645328ae	199	if (!kctx) {
7682f304	200	ret = -LTTNG_ERR_NOMEM;
645328ae DG	201	goto error;
	202	}
	203
54d01ffb	204	/* Setup kernel context structure */
9197c5c4 MD	205	switch (ctx->ctx) {
9197c5c4 MD	206	case LTTNG_EVENT_CONTEXT_PID:
b8e2fb80	207	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID;
9197c5c4	208	break;
9197c5c4	209	case LTTNG_EVENT_CONTEXT_PROCNAME:
b8e2fb80	210	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PROCNAME;
9197c5c4 MD	211	break;
9197c5c4 MD	212	case LTTNG_EVENT_CONTEXT_PRIO:
b8e2fb80	213	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PRIO;
9197c5c4 MD	214	break;
9197c5c4 MD	215	case LTTNG_EVENT_CONTEXT_NICE:
b8e2fb80	216	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NICE;
9197c5c4 MD	217	break;
9197c5c4 MD	218	case LTTNG_EVENT_CONTEXT_VPID:
b8e2fb80	219	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPID;
9197c5c4 MD	220	break;
9197c5c4 MD	221	case LTTNG_EVENT_CONTEXT_TID:
b8e2fb80	222	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TID;
9197c5c4 MD	223	break;
9197c5c4 MD	224	case LTTNG_EVENT_CONTEXT_VTID:
b8e2fb80	225	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VTID;
9197c5c4 MD	226	break;
9197c5c4 MD	227	case LTTNG_EVENT_CONTEXT_PPID:
b8e2fb80	228	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PPID;
9197c5c4 MD	229	break;
9197c5c4 MD	230	case LTTNG_EVENT_CONTEXT_VPPID:
b8e2fb80	231	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VPPID;
9197c5c4	232	break;
54773d68	233	case LTTNG_EVENT_CONTEXT_HOSTNAME:
b8e2fb80	234	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME;
54773d68	235	break;
aa3514e9 MD	236	case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER:
aa3514e9 MD	237	case LTTNG_EVENT_CONTEXT_PERF_COUNTER:
b8e2fb80	238	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER;
aa3514e9	239	break;
1ae5e83e	240	case LTTNG_EVENT_CONTEXT_INTERRUPTIBLE:
b8e2fb80	241	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE;
1ae5e83e JD	242	break;
1ae5e83e JD	243	case LTTNG_EVENT_CONTEXT_PREEMPTIBLE:
b8e2fb80	244	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE;
1ae5e83e JD	245	break;
1ae5e83e JD	246	case LTTNG_EVENT_CONTEXT_NEED_RESCHEDULE:
b8e2fb80	247	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE;
1ae5e83e JD	248	break;
1ae5e83e JD	249	case LTTNG_EVENT_CONTEXT_MIGRATABLE:
b8e2fb80	250	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE;
1ae5e83e	251	break;
373148e9	252	case LTTNG_EVENT_CONTEXT_CALLSTACK_KERNEL:
b8e2fb80	253	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL;
373148e9 FG	254	break;
373148e9 FG	255	case LTTNG_EVENT_CONTEXT_CALLSTACK_USER:
b8e2fb80	256	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER;
373148e9	257	break;
40e14884	258	case LTTNG_EVENT_CONTEXT_CGROUP_NS:
b8e2fb80	259	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS;
40e14884 MJ	260	break;
40e14884 MJ	261	case LTTNG_EVENT_CONTEXT_IPC_NS:
b8e2fb80	262	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_IPC_NS;
40e14884 MJ	263	break;
40e14884 MJ	264	case LTTNG_EVENT_CONTEXT_MNT_NS:
b8e2fb80	265	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_MNT_NS;
40e14884 MJ	266	break;
40e14884 MJ	267	case LTTNG_EVENT_CONTEXT_NET_NS:
b8e2fb80	268	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_NET_NS;
40e14884 MJ	269	break;
40e14884 MJ	270	case LTTNG_EVENT_CONTEXT_PID_NS:
b8e2fb80	271	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_PID_NS;
40e14884	272	break;
d37ac3cd	273	case LTTNG_EVENT_CONTEXT_TIME_NS:
b8e2fb80	274	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_TIME_NS;
d37ac3cd	275	break;
40e14884	276	case LTTNG_EVENT_CONTEXT_USER_NS:
b8e2fb80	277	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_USER_NS;
40e14884 MJ	278	break;
40e14884 MJ	279	case LTTNG_EVENT_CONTEXT_UTS_NS:
b8e2fb80	280	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UTS_NS;
40e14884	281	break;
499cbfa1	282	case LTTNG_EVENT_CONTEXT_UID:
b8e2fb80	283	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_UID;
499cbfa1 MJ	284	break;
499cbfa1 MJ	285	case LTTNG_EVENT_CONTEXT_EUID:
b8e2fb80	286	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EUID;
499cbfa1 MJ	287	break;
499cbfa1 MJ	288	case LTTNG_EVENT_CONTEXT_SUID:
b8e2fb80	289	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SUID;
499cbfa1 MJ	290	break;
499cbfa1 MJ	291	case LTTNG_EVENT_CONTEXT_GID:
b8e2fb80	292	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_GID;
499cbfa1 MJ	293	break;
499cbfa1 MJ	294	case LTTNG_EVENT_CONTEXT_EGID:
b8e2fb80	295	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_EGID;
499cbfa1 MJ	296	break;
499cbfa1 MJ	297	case LTTNG_EVENT_CONTEXT_SGID:
b8e2fb80	298	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_SGID;
499cbfa1 MJ	299	break;
499cbfa1 MJ	300	case LTTNG_EVENT_CONTEXT_VUID:
b8e2fb80	301	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VUID;
499cbfa1 MJ	302	break;
499cbfa1 MJ	303	case LTTNG_EVENT_CONTEXT_VEUID:
b8e2fb80	304	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEUID;
499cbfa1 MJ	305	break;
499cbfa1 MJ	306	case LTTNG_EVENT_CONTEXT_VSUID:
b8e2fb80	307	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSUID;
499cbfa1 MJ	308	break;
499cbfa1 MJ	309	case LTTNG_EVENT_CONTEXT_VGID:
b8e2fb80	310	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VGID;
499cbfa1 MJ	311	break;
499cbfa1 MJ	312	case LTTNG_EVENT_CONTEXT_VEGID:
b8e2fb80	313	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VEGID;
499cbfa1 MJ	314	break;
499cbfa1 MJ	315	case LTTNG_EVENT_CONTEXT_VSGID:
b8e2fb80	316	kctx->ctx.ctx = LTTNG_KERNEL_ABI_CONTEXT_VSGID;
499cbfa1	317	break;
9197c5c4	318	default:
fc7324e8 DG	319	ret = LTTNG_ERR_KERN_CONTEXT_FAIL;
fc7324e8 DG	320	goto error;
9197c5c4 MD	321	}
9197c5c4 MD	322
645328ae DG	323	kctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type;
645328ae DG	324	kctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config;
28ab034a	325	strncpy(kctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, LTTNG_SYMBOL_NAME_LEN);
645328ae	326	kctx->ctx.u.perf_counter.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
b579acd9	327
9d035200	328	if (*channel_name == '\0') {
645328ae	329	ret = add_kctx_all_channels(ksession, kctx);
df3c77c8	330	/* Ownership of kctx is transferred to the callee. */
cd9adb8b	331	kctx = nullptr;
f73fabfd	332	if (ret != LTTNG_OK) {
b579acd9 DG	333	goto error;
	334	}
	335	} else {
	336	/* Get kernel channel */
62499ad6	337	kchan = trace_kernel_get_channel_by_name(channel_name, ksession);
cd9adb8b	338	if (kchan == nullptr) {
f73fabfd	339	ret = LTTNG_ERR_KERN_CHAN_NOT_FOUND;
b579acd9 DG	340	goto error;
	341	}
	342
645328ae	343	ret = add_kctx_to_channel(kctx, kchan);
df3c77c8	344	/* Ownership of kctx is transferred to the callee. */
cd9adb8b	345	kctx = nullptr;
f73fabfd	346	if (ret != LTTNG_OK) {
b579acd9 DG	347	goto error;
	348	}
	349	}
	350
df3c77c8	351	ret = LTTNG_OK;
b579acd9 DG	352
b579acd9 DG	353	error:
fc7324e8 DG	354	if (kctx) {
	355	trace_kernel_destroy_context(kctx);
	356	}
b579acd9 DG	357	return ret;
b579acd9 DG	358	}
2bdd86d4 MD	359
2bdd86d4 MD	360	/*
55cc08a6	361	* Add UST context to tracer.
2bdd86d4	362	*/
4ce7709b	363	int context_ust_add(struct ltt_ust_session *usess,
28ab034a JG	364	enum lttng_domain_type domain,
	365	const struct lttng_event_context *ctx,
	366	const char *channel_name)
2bdd86d4	367	{
601d5acf	368	int ret = LTTNG_OK;
442359c0	369	struct lttng_ht_iter iter;
bec39940	370	struct lttng_ht *chan_ht;
cd9adb8b	371	struct ltt_ust_channel *uchan = nullptr;
2bdd86d4	372
a0377dfe FD	373	LTTNG_ASSERT(usess);
	374	LTTNG_ASSERT(ctx);
	375	LTTNG_ASSERT(channel_name);
0525e9ae	376
2223c96f DG	377	rcu_read_lock();
2223c96f DG	378
f5501dad	379	chan_ht = usess->domain_global.channels;
2bdd86d4	380
55cc08a6	381	/* Get UST channel if defined */
9f9ee9c9	382	if (channel_name[0] != '\0') {
55cc08a6	383	uchan = trace_ust_find_channel_by_name(chan_ht, channel_name);
cd9adb8b	384	if (uchan == nullptr) {
f73fabfd	385	ret = LTTNG_ERR_UST_CHAN_NOT_FOUND;
2bdd86d4 MD	386	goto error;
2bdd86d4 MD	387	}
55cc08a6 DG	388	}
55cc08a6 DG	389
601d5acf DG	390	if (uchan) {
601d5acf DG	391	/* Add ctx to channel */
6b79ed20	392	ret = add_uctx_to_channel(usess, domain, uchan, ctx);
601d5acf	393	} else {
e7fe706f	394	rcu_read_lock();
601d5acf	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	}
e7fe706f	403	rcu_read_unlock();
55cc08a6	404	}
2bdd86d4	405
55cc08a6	406	switch (ret) {
7682f304	407	case LTTNG_ERR_UST_CONTEXT_EXIST:
727d5404	408	break;
55cc08a6	409	case -ENOMEM:
7682f304	410	case -LTTNG_ERR_NOMEM:
f73fabfd	411	ret = LTTNG_ERR_FATAL;
727d5404 DG	412	break;
727d5404 DG	413	case -EINVAL:
f73fabfd	414	ret = LTTNG_ERR_UST_CONTEXT_INVAL;
727d5404 DG	415	break;
727d5404 DG	416	case -ENOSYS:
f73fabfd	417	ret = LTTNG_ERR_UNKNOWN_DOMAIN;
727d5404 DG	418	break;
727d5404 DG	419	default:
7682f304 JG	420	if (ret != 0 && ret != LTTNG_OK) {
	421	ret = ret > 0 ? ret : LTTNG_ERR_UNK;
	422	} else {
	423	ret = LTTNG_OK;
	424	}
727d5404	425	break;
2bdd86d4 MD	426	}
2bdd86d4 MD	427
2bdd86d4	428	error:
2223c96f	429	rcu_read_unlock();
2bdd86d4 MD	430	return ret;
2bdd86d4 MD	431	}