+++ /dev/null
-/*
- * Copyright (C) 2012 - David Goulet <dgoulet@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 _GNU_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include <common/common.h>
-#include <common/defaults.h>
-
-#include "consumer.h"
-#include "kernel-consumer.h"
-
-/*
- * Sending a single channel to the consumer with command ADD_CHANNEL.
- */
-int kernel_consumer_add_channel(int sock, struct ltt_kernel_channel *channel)
-{
- int ret;
- struct lttcomm_consumer_msg lkm;
-
- /* Safety net */
- assert(channel);
-
- DBG("Kernel consumer adding channel %s to kernel consumer",
- channel->channel->name);
-
- /* Prep channel message structure */
- consumer_init_channel_comm_msg(&lkm,
- LTTNG_CONSUMER_ADD_CHANNEL,
- channel->fd,
- channel->channel->attr.subbuf_size,
- 0, /* Kernel */
- channel->channel->name,
- channel->stream_count);
-
- ret = consumer_send_channel(sock, &lkm);
- if (ret < 0) {
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
- */
-int kernel_consumer_add_metadata(int sock, struct ltt_kernel_session *session)
-{
- int ret;
- char tmp_path[PATH_MAX];
- const char *pathname;
- struct lttcomm_consumer_msg lkm;
- struct consumer_output *consumer;
-
- /* Safety net */
- assert(session);
- assert(session->consumer);
-
- DBG("Sending metadata %d to kernel consumer", session->metadata_stream_fd);
-
- /* Get consumer output pointer */
- consumer = session->consumer;
-
- /* Get the right path name destination */
- if (consumer->type == CONSUMER_DST_LOCAL) {
- /* Set application path to the destination path */
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
- consumer->dst.trace_path, consumer->subdir);
- if (ret < 0) {
- PERROR("snprintf metadata path");
- goto error;
- }
- pathname = tmp_path;
-
- /* Create directory */
- ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG,
- session->uid, session->gid);
- if (ret < 0) {
- if (ret != -EEXIST) {
- ERR("Trace directory creation error");
- goto error;
- }
- }
- DBG3("Kernel local consumer tracefile path: %s", pathname);
- } else {
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir);
- if (ret < 0) {
- PERROR("snprintf metadata path");
- goto error;
- }
- pathname = tmp_path;
- DBG3("Kernel network consumer subdir path: %s", pathname);
- }
-
- /* Prep channel message structure */
- consumer_init_channel_comm_msg(&lkm,
- LTTNG_CONSUMER_ADD_CHANNEL,
- session->metadata->fd,
- session->metadata->conf->attr.subbuf_size,
- 0, /* for kernel */
- "metadata",
- 1);
-
- ret = consumer_send_channel(sock, &lkm);
- if (ret < 0) {
- goto error;
- }
-
- /* Prep stream message structure */
- consumer_init_stream_comm_msg(&lkm,
- LTTNG_CONSUMER_ADD_STREAM,
- session->metadata->fd,
- session->metadata_stream_fd,
- LTTNG_CONSUMER_ACTIVE_STREAM,
- DEFAULT_KERNEL_CHANNEL_OUTPUT,
- 0, /* Kernel */
- session->uid,
- session->gid,
- consumer->net_seq_index,
- 1, /* Metadata flag set */
- "metadata",
- pathname);
-
- /* Send stream and file descriptor */
- ret = consumer_send_stream(sock, consumer, &lkm,
- &session->metadata_stream_fd, 1);
- if (ret < 0) {
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * Sending a single stream to the consumer with command ADD_STREAM.
- */
-int kernel_consumer_add_stream(int sock, struct ltt_kernel_channel *channel,
- struct ltt_kernel_stream *stream, struct ltt_kernel_session *session)
-{
- int ret;
- char tmp_path[PATH_MAX];
- const char *pathname;
- struct lttcomm_consumer_msg lkm;
- struct consumer_output *consumer;
-
- assert(channel);
- assert(stream);
- assert(session);
- assert(session->consumer);
-
- DBG("Sending stream %d of channel %s to kernel consumer",
- stream->fd, channel->channel->name);
-
- /* Get consumer output pointer */
- consumer = session->consumer;
-
- /* Get the right path name destination */
- if (consumer->type == CONSUMER_DST_LOCAL) {
- /* Set application path to the destination path */
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
- consumer->dst.trace_path, consumer->subdir);
- if (ret < 0) {
- PERROR("snprintf stream path");
- goto error;
- }
- pathname = tmp_path;
- DBG3("Kernel local consumer tracefile path: %s", pathname);
- } else {
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s", consumer->subdir);
- if (ret < 0) {
- PERROR("snprintf stream path");
- goto error;
- }
- pathname = tmp_path;
- DBG3("Kernel network consumer subdir path: %s", pathname);
- }
-
- /* Prep stream consumer message */
- consumer_init_stream_comm_msg(&lkm, LTTNG_CONSUMER_ADD_STREAM,
- channel->fd,
- stream->fd,
- stream->state,
- channel->channel->attr.output,
- 0, /* Kernel */
- session->uid,
- session->gid,
- consumer->net_seq_index,
- 0, /* Metadata flag unset */
- stream->name,
- pathname);
-
- /* Send stream and file descriptor */
- ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1);
- if (ret < 0) {
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * Send all stream fds of kernel channel to the consumer.
- */
-int kernel_consumer_send_channel_stream(int sock,
- struct ltt_kernel_channel *channel, struct ltt_kernel_session *session)
-{
- int ret;
- struct ltt_kernel_stream *stream;
-
- /* Safety net */
- assert(channel);
- assert(session);
- assert(session->consumer);
-
- /* Bail out if consumer is disabled */
- if (!session->consumer->enabled) {
- ret = LTTNG_OK;
- goto error;
- }
-
- DBG("Sending streams of channel %s to kernel consumer",
- channel->channel->name);
-
- ret = kernel_consumer_add_channel(sock, channel);
- if (ret < 0) {
- goto error;
- }
-
- /* Send streams */
- cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
- if (!stream->fd) {
- continue;
- }
-
- /* Add stream on the kernel consumer side. */
- ret = kernel_consumer_add_stream(sock, channel, stream, session);
- if (ret < 0) {
- goto error;
- }
- }
-
-error:
- return ret;
-}
-
-/*
- * Send all stream fds of the kernel session to the consumer.
- */
-int kernel_consumer_send_session(int sock, struct ltt_kernel_session *session)
-{
- int ret;
- struct ltt_kernel_channel *chan;
-
- /* Safety net */
- assert(session);
- assert(session->consumer);
-
- /* Bail out if consumer is disabled */
- if (!session->consumer->enabled) {
- ret = LTTNG_OK;
- goto error;
- }
-
- DBG("Sending session stream to kernel consumer");
-
- if (session->metadata_stream_fd >= 0) {
- ret = kernel_consumer_add_metadata(sock, session);
- if (ret < 0) {
- goto error;
- }
-
- /* Flag that at least the metadata has been sent to the consumer. */
- session->consumer_fds_sent = 1;
- }
-
- /* Send channel and streams of it */
- cds_list_for_each_entry(chan, &session->channel_list.head, list) {
- ret = kernel_consumer_send_channel_stream(sock, chan, session);
- if (ret < 0) {
- goto error;
- }
- }
-
- DBG("Kernel consumer FDs of metadata and channel streams sent");
-
- return 0;
-
-error:
- return ret;
-}