+++ /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 as published by the Free
- * Software Foundation; only version 2 of the License.
- *
- * 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., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define _GNU_SOURCE
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <lttngerr.h>
-#include <lttng-share.h>
-#include <lttng-sessiond-comm.h>
-#include <lttng/lttng-consumer.h>
-
-#include "hashtable.h"
-#include "ust-consumer.h"
-
-/*
- * Send all stream fds of UST channel to the consumer.
- */
-static int send_channel_streams(int sock,
- struct ust_app_channel *uchan)
-{
- int ret, fds[2];
- struct ltt_ust_stream *stream;
- struct lttcomm_consumer_msg lum;
- struct cds_lfht_iter iter;
- struct cds_lfht_node *node;
-
- DBG("Sending streams of channel %s to UST consumer", uchan->name);
-
- /* Send channel */
- lum.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
-
- /*
- * We need to keep shm_fd open to make sure this key stays unique within
- * the session daemon.
- */
- lum.u.channel.channel_key = uchan->obj->shm_fd;
- lum.u.channel.max_sb_size = uchan->attr.subbuf_size;
- lum.u.channel.mmap_len = uchan->obj->memory_map_size;
- DBG("Sending channel %d to consumer", lum.u.channel.channel_key);
- ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum));
- if (ret < 0) {
- perror("send consumer channel");
- goto error;
- }
- fds[0] = uchan->obj->shm_fd;
- fds[1] = uchan->obj->wait_fd;
- ret = lttcomm_send_fds_unix_sock(sock, fds, 2);
- if (ret < 0) {
- perror("send consumer channel ancillary data");
- goto error;
- }
-
-
- rcu_read_lock();
- hashtable_get_first(uchan->streams, &iter);
- while ((node = hashtable_iter_get_node(&iter)) != NULL) {
- stream = caa_container_of(node, struct ltt_ust_stream, node);
-
- int fds[2];
-
- if (!stream->obj->shm_fd) {
- goto next;
- }
-
- lum.cmd_type = LTTNG_CONSUMER_ADD_STREAM;
- lum.u.stream.channel_key = uchan->obj->shm_fd;
- lum.u.stream.stream_key = stream->obj->shm_fd;
- lum.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM;
- lum.u.stream.output = uchan->attr.output;
- lum.u.stream.mmap_len = stream->obj->memory_map_size;
- strncpy(lum.u.stream.path_name, stream->pathname, PATH_MAX - 1);
- lum.u.stream.path_name[PATH_MAX - 1] = '\0';
- DBG("Sending stream %d to consumer", lum.u.stream.stream_key);
- ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum));
- if (ret < 0) {
- perror("send consumer stream");
- goto error;
- }
-
- fds[0] = stream->obj->shm_fd;
- fds[1] = stream->obj->wait_fd;
- ret = lttcomm_send_fds_unix_sock(sock, fds, 2);
- if (ret < 0) {
- perror("send consumer stream ancillary data");
- goto error;
- }
-
-next:
- hashtable_get_next(uchan->streams, &iter);
- }
- rcu_read_unlock();
-
- DBG("consumer channel streams sent");
-
- return 0;
-
-error:
- return ret;
-}
-
-/*
- * Send all stream fds of the UST session to the consumer.
- */
-int ust_consumer_send_session(int consumer_fd, struct ust_app_session *usess)
-{
- int ret = 0;
- int sock = consumer_fd;
- struct cds_lfht_iter iter;
- struct cds_lfht_node *node;
- struct lttcomm_consumer_msg lum;
- struct ust_app_channel *uchan;
-
- DBG("Sending metadata stream fd");
-
- if (usess->metadata->obj->shm_fd != 0) {
- int fds[2];
-
- /* Send metadata channel fd */
- lum.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
- lum.u.channel.channel_key = usess->metadata->obj->shm_fd;
- lum.u.channel.max_sb_size = usess->metadata->attr.subbuf_size;
- lum.u.channel.mmap_len = 0; /* for kernel */
- DBG("Sending metadata channel %d to consumer", lum.u.stream.stream_key);
- ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum));
- if (ret < 0) {
- perror("send consumer channel");
- goto error;
- }
- fds[0] = usess->metadata->obj->shm_fd;
- fds[1] = usess->metadata->obj->wait_fd;
- ret = lttcomm_send_fds_unix_sock(sock, fds, 2);
- if (ret < 0) {
- perror("send consumer metadata channel");
- goto error;
- }
-
- /* Send metadata stream fd */
- lum.cmd_type = LTTNG_CONSUMER_ADD_STREAM;
- lum.u.stream.channel_key = usess->metadata->obj->shm_fd;
- lum.u.stream.stream_key = usess->metadata->stream_obj->shm_fd;
- lum.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM;
- lum.u.stream.output = DEFAULT_UST_CHANNEL_OUTPUT;
- lum.u.stream.mmap_len = usess->metadata->stream_obj->memory_map_size;
- strncpy(lum.u.stream.path_name, usess->metadata->pathname, PATH_MAX - 1);
- lum.u.stream.path_name[PATH_MAX - 1] = '\0';
- DBG("Sending metadata stream %d to consumer", lum.u.stream.stream_key);
- ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum));
- if (ret < 0) {
- perror("send consumer metadata stream");
- goto error;
- }
- fds[0] = usess->metadata->stream_obj->shm_fd;
- fds[1] = usess->metadata->stream_obj->wait_fd;
- ret = lttcomm_send_fds_unix_sock(sock, fds, 2);
- if (ret < 0) {
- perror("send consumer stream");
- goto error;
- }
- }
-
- /* Send each channel fd streams of session */
- rcu_read_lock();
- hashtable_get_first(usess->channels, &iter);
- while ((node = hashtable_iter_get_node(&iter)) != NULL) {
- uchan = caa_container_of(node, struct ust_app_channel, node);
-
- ret = send_channel_streams(sock, uchan);
- if (ret < 0) {
- goto error;
- }
- hashtable_get_next(usess->channels, &iter);
- }
- rcu_read_unlock();
-
- DBG("consumer fds (metadata and channel streams) sent");
-
- return 0;
-
-error:
- return ret;
-}
projects / lttng-tools.git / blobdiff