+++ /dev/null
-/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- *
- * 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"
-
-/*
- * 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, int domain,
- struct ltt_ust_channel *uchan, struct lttng_event_context *ctx)
-{
- int ret;
- struct ltt_ust_context *uctx;
-
- 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;
- }
- }
-
- /* Create ltt UST context */
- uctx = trace_ust_create_context(ctx);
- if (uctx == NULL) {
- ret = -EINVAL;
- goto error;
- }
-
- switch (domain) {
- case LTTNG_DOMAIN_UST:
- ret = ust_app_add_ctx_channel_glb(usess, uchan, uctx);
- if (ret < 0) {
- goto error;
- }
- break;
- default:
- ret = -ENOSYS;
- 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, int 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();
-
- /*
- * Define which channel's hashtable to use from the domain or quit if
- * unknown domain.
- */
- switch (domain) {
- case LTTNG_DOMAIN_UST:
- chan_ht = usess->domain_global.channels;
- break;
- default:
- ret = LTTNG_ERR_UND;
- goto error;
- }
-
- /* 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;
-}
projects / lttng-tools.git / blobdiff