+++ /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 _GNU_SOURCE
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <common/common.h>
-#include <common/consumer.h>
-#include <common/defaults.h>
-
-#include "consumer.h"
-#include "ust-consumer.h"
-
-/*
- * Send a single channel to the consumer using command ADD_CHANNEL.
- */
-static int send_channel(struct consumer_socket *sock,
- struct ust_app_channel *uchan)
-{
- int ret, fd;
- struct lttcomm_consumer_msg msg;
-
- /* Safety net */
- assert(uchan);
- assert(sock);
-
- if (sock->fd < 0) {
- ret = -EINVAL;
- goto error;
- }
-
- DBG2("Sending channel %s to UST consumer", uchan->name);
-
- consumer_init_channel_comm_msg(&msg,
- LTTNG_CONSUMER_ADD_CHANNEL,
- uchan->obj->shm_fd,
- uchan->attr.subbuf_size,
- uchan->obj->memory_map_size,
- uchan->name,
- uchan->streams.count);
-
- health_code_update(&health_thread_cmd);
-
- ret = consumer_send_channel(sock, &msg);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update(&health_thread_cmd);
-
- fd = uchan->obj->shm_fd;
- ret = consumer_send_fds(sock, &fd, 1);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update(&health_thread_cmd);
-
-error:
- return ret;
-}
-
-/*
- * Send a single stream to the consumer using ADD_STREAM command.
- */
-static int send_channel_stream(struct consumer_socket *sock,
- struct ust_app_channel *uchan, struct ust_app_session *usess,
- struct ltt_ust_stream *stream, struct consumer_output *consumer,
- const char *pathname)
-{
- int ret, fds[2];
- struct lttcomm_consumer_msg msg;
-
- /* Safety net */
- assert(uchan);
- assert(usess);
- assert(stream);
- assert(consumer);
- assert(sock);
-
- DBG2("Sending stream %d of channel %s to kernel consumer",
- stream->obj->shm_fd, uchan->name);
-
- consumer_init_stream_comm_msg(&msg,
- LTTNG_CONSUMER_ADD_STREAM,
- uchan->obj->shm_fd,
- stream->obj->shm_fd,
- LTTNG_CONSUMER_ACTIVE_STREAM,
- DEFAULT_UST_CHANNEL_OUTPUT,
- stream->obj->memory_map_size,
- usess->uid,
- usess->gid,
- consumer->net_seq_index,
- 0, /* Metadata flag unset */
- stream->name,
- pathname,
- usess->id);
-
- health_code_update(&health_thread_cmd);
-
- /* Send stream and file descriptor */
- fds[0] = stream->obj->shm_fd;
- fds[1] = stream->obj->wait_fd;
- ret = consumer_send_stream(sock, consumer, &msg, fds, 2);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update(&health_thread_cmd);
-
-error:
- return ret;
-}
-
-/*
- * Send all stream fds of UST channel to the consumer.
- */
-static int send_channel_streams(struct consumer_socket *sock,
- struct ust_app_channel *uchan, struct ust_app_session *usess,
- struct consumer_output *consumer)
-{
- int ret;
- char tmp_path[PATH_MAX];
- const char *pathname;
- struct ltt_ust_stream *stream, *tmp;
-
- assert(sock);
-
- DBG("Sending streams of channel %s to UST consumer", uchan->name);
-
- ret = send_channel(sock, uchan);
- if (ret < 0) {
- goto error;
- }
-
- /* 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/%s",
- consumer->dst.trace_path, consumer->subdir, usess->path);
- if (ret < 0) {
- PERROR("snprintf stream path");
- goto error;
- }
- pathname = tmp_path;
- DBG3("UST local consumer tracefile path: %s", pathname);
- } else {
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
- consumer->subdir, usess->path);
- if (ret < 0) {
- PERROR("snprintf stream path");
- goto error;
- }
- pathname = tmp_path;
- DBG3("UST network consumer subdir path: %s", pathname);
- }
-
- cds_list_for_each_entry_safe(stream, tmp, &uchan->streams.head, list) {
- if (!stream->obj->shm_fd) {
- continue;
- }
-
- ret = send_channel_stream(sock, uchan, usess, stream, consumer,
- pathname);
- if (ret < 0) {
- goto error;
- }
- }
-
- DBG("UST consumer channel streams sent");
-
- return 0;
-
-error:
- return ret;
-}
-
-/*
- * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
- */
-static int send_metadata(struct consumer_socket *sock,
- struct ust_app_session *usess, struct consumer_output *consumer)
-{
- int ret, fd, fds[2];
- char tmp_path[PATH_MAX];
- const char *pathname;
- struct lttcomm_consumer_msg msg;
-
- /* Safety net */
- assert(usess);
- assert(consumer);
- assert(sock);
-
- if (sock->fd < 0) {
- ERR("Consumer socket is negative (%d)", sock->fd);
- return -EINVAL;
- }
-
- if (usess->metadata->obj->shm_fd == 0) {
- ERR("Metadata obj shm_fd is 0");
- ret = -1;
- goto error;
- }
-
- DBG("UST consumer sending metadata stream fd");
-
- consumer_init_channel_comm_msg(&msg,
- LTTNG_CONSUMER_ADD_CHANNEL,
- usess->metadata->obj->shm_fd,
- usess->metadata->attr.subbuf_size,
- usess->metadata->obj->memory_map_size,
- "metadata",
- 1);
-
- health_code_update(&health_thread_cmd);
-
- ret = consumer_send_channel(sock, &msg);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update(&health_thread_cmd);
-
- /* Sending metadata shared memory fd */
- fd = usess->metadata->obj->shm_fd;
- ret = consumer_send_fds(sock, &fd, 1);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update(&health_thread_cmd);
-
- /* Get correct 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/%s",
- consumer->dst.trace_path, consumer->subdir, usess->path);
- if (ret < 0) {
- PERROR("snprintf stream path");
- goto error;
- }
- pathname = tmp_path;
-
- /* Create directory */
- ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG,
- usess->uid, usess->gid);
- if (ret < 0) {
- if (ret != -EEXIST) {
- ERR("Trace directory creation error");
- goto error;
- }
- }
- } else {
- ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
- consumer->subdir, usess->path);
- if (ret < 0) {
- PERROR("snprintf metadata path");
- goto error;
- }
- pathname = tmp_path;
- }
-
- consumer_init_stream_comm_msg(&msg,
- LTTNG_CONSUMER_ADD_STREAM,
- usess->metadata->obj->shm_fd,
- usess->metadata->stream_obj->shm_fd,
- LTTNG_CONSUMER_ACTIVE_STREAM,
- DEFAULT_UST_CHANNEL_OUTPUT,
- usess->metadata->stream_obj->memory_map_size,
- usess->uid,
- usess->gid,
- consumer->net_seq_index,
- 1, /* Flag metadata set */
- "metadata",
- pathname,
- usess->id);
-
- health_code_update(&health_thread_cmd);
-
- /* Send stream and file descriptor */
- fds[0] = usess->metadata->stream_obj->shm_fd;
- fds[1] = usess->metadata->stream_obj->wait_fd;
- ret = consumer_send_stream(sock, consumer, &msg, fds, 2);
- if (ret < 0) {
- goto error;
- }
-
- health_code_update(&health_thread_cmd);
-
-error:
- return ret;
-}
-
-/*
- * Send all stream fds of the UST session to the consumer.
- */
-int ust_consumer_send_session(struct ust_app_session *usess,
- struct consumer_output *consumer, struct consumer_socket *sock)
-{
- int ret = 0;
- struct lttng_ht_iter iter;
- struct ust_app_channel *ua_chan;
-
- assert(usess);
-
- if (consumer == NULL || sock == NULL) {
- /* There is no consumer so just ignoring the command. */
- DBG("UST consumer does not exist. Not sending streams");
- return 0;
- }
-
- DBG("Sending metadata stream fd to consumer on %d", sock->fd);
-
- pthread_mutex_lock(sock->lock);
-
- /* Sending metadata information to the consumer */
- ret = send_metadata(sock, usess, consumer);
- if (ret < 0) {
- goto error;
- }
-
- /* Send each channel fd streams of session */
- rcu_read_lock();
- cds_lfht_for_each_entry(usess->channels->ht, &iter.iter, ua_chan,
- node.node) {
- /*
- * Indicate that the channel was not created on the tracer side so skip
- * sending unexisting streams.
- */
- if (ua_chan->obj == NULL) {
- continue;
- }
-
- ret = send_channel_streams(sock, ua_chan, usess, consumer);
- if (ret < 0) {
- rcu_read_unlock();
- goto error;
- }
- }
- rcu_read_unlock();
-
- DBG("consumer fds (metadata and channel streams) sent");
-
- /* All good! */
- ret = 0;
-
-error:
- pthread_mutex_unlock(sock->lock);
- return ret;
-}
projects / lttng-tools.git / blobdiff