+++ /dev/null
-/*
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#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;
-
- 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 = 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;
-
- 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 = 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;
-
- 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 = 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:
- abort();
- }
-
- /* 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;
-
- LTTNG_ASSERT(ksession);
- LTTNG_ASSERT(ctx);
- LTTNG_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_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 = 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;
-
- 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 == 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;
-}
projects / lttng-tools.git / blobdiff