/*
* 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 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.
+ * 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.
+ * 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 <common/common.h>
#include <common/consumer.h>
#include <common/defaults.h>
-#include <common/sessiond-comm/sessiond-comm.h>
+#include "consumer.h"
#include "ust-consumer.h"
/*
- * Send all stream fds of UST channel to the consumer.
+ * Send a single channel to the consumer using command ADD_CHANNEL.
*/
-static int send_channel_streams(int sock,
- struct ust_app_channel *uchan,
- uid_t uid, gid_t gid)
+static int send_channel(int sock, struct ust_app_channel *uchan)
{
int ret, fd;
- struct lttcomm_consumer_msg lum;
- struct ltt_ust_stream *stream, *tmp;
+ struct lttcomm_consumer_msg msg;
- DBG("Sending streams of channel %s to UST consumer", uchan->name);
+ /* Safety net */
+ assert(uchan);
+
+ if (sock < 0) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ DBG2("Sending channel %s to UST consumer", uchan->name);
- /* Send channel */
- lum.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
-
- /*
- * We need to keep shm_fd open while we transfer the stream file
- * descriptors to make sure this key stays unique within the
- * session daemon. We can free the channel shm_fd without
- * problem after we finished sending stream fds for that
- * channel.
- */
- 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));
+ 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);
+
+ ret = consumer_send_channel(sock, &msg);
if (ret < 0) {
- perror("send consumer channel");
goto error;
}
+
fd = uchan->obj->shm_fd;
- ret = lttcomm_send_fds_unix_sock(sock, &fd, 1);
+ ret = consumer_send_fds(sock, &fd, 1);
if (ret < 0) {
- perror("send consumer channel ancillary data");
goto error;
}
- cds_list_for_each_entry_safe(stream, tmp, &uchan->streams.head, list) {
- int fds[2];
+error:
+ return ret;
+}
- if (!stream->obj->shm_fd) {
- continue;
+/*
+ * Send a single stream to the consumer using ADD_STREAM command.
+ */
+static int send_channel_stream(int 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);
+
+ 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);
+
+ /* 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;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * Send all stream fds of UST channel to the consumer.
+ */
+int ust_consumer_send_channel_streams(int 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;
+
+ 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",
+ consumer->dst.trace_path, usess->path);
+ if (ret < 0) {
+ PERROR("snprintf stream path");
+ goto error;
}
- 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;
- /*
- * FIXME Hack alert! we force MMAP for now. Mixup
- * between EVENT and UST enums elsewhere.
- */
- lum.u.stream.output = DEFAULT_UST_CHANNEL_OUTPUT;
- lum.u.stream.mmap_len = stream->obj->memory_map_size;
- lum.u.stream.uid = uid;
- lum.u.stream.gid = gid;
- 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));
+ 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("send consumer stream");
+ PERROR("snprintf stream path");
goto error;
}
+ pathname = tmp_path;
+ DBG3("UST network consumer subdir path: %s", pathname);
+ }
- fds[0] = stream->obj->shm_fd;
- fds[1] = stream->obj->wait_fd;
- ret = lttcomm_send_fds_unix_sock(sock, fds, 2);
+ 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) {
- perror("send consumer stream ancillary data");
goto error;
}
}
- DBG("consumer channel streams sent");
+ DBG("UST consumer channel streams sent");
return 0;
}
/*
- * Send all stream fds of the UST session to the consumer.
+ * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
*/
-int ust_consumer_send_session(int consumer_fd, struct ust_app_session *usess)
+int ust_consumer_send_metadata(int sock, struct ust_app_session *usess,
+ struct consumer_output *consumer)
{
- int ret = 0;
- int sock = consumer_fd;
- struct lttng_ht_iter iter;
- struct lttcomm_consumer_msg lum;
- struct ust_app_channel *ua_chan;
+ int ret, fd, fds[2];
+ char tmp_path[PATH_MAX];
+ const char *pathname;
+ struct lttcomm_consumer_msg msg;
- DBG("Sending metadata stream fd");
+ /* Safety net */
+ assert(usess);
+ assert(consumer);
- if (consumer_fd < 0) {
- ERR("Consumer has negative file descriptor");
+ if (sock < 0) {
+ ERR("Consumer socket is negative (%d)", sock);
return -EINVAL;
}
- if (usess->metadata->obj->shm_fd != 0) {
- int fd;
- int fds[2];
+ if (usess->metadata->obj->shm_fd == 0) {
+ ERR("Metadata obj shm_fd is 0");
+ ret = -1;
+ goto error;
+ }
- /* 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 = usess->metadata->obj->memory_map_size;
- DBG("Sending metadata 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;
- }
- fd = usess->metadata->obj->shm_fd;
- ret = lttcomm_send_fds_unix_sock(sock, &fd, 1);
+ 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");
+
+ ret = consumer_send_channel(sock, &msg);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* Sending metadata shared memory fd */
+ fd = usess->metadata->obj->shm_fd;
+ ret = consumer_send_fds(sock, &fd, 1);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* 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",
+ consumer->dst.trace_path, usess->path);
if (ret < 0) {
- perror("send consumer metadata channel");
+ PERROR("snprintf stream path");
goto error;
}
+ pathname = tmp_path;
- /* 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;
- lum.u.stream.uid = usess->uid;
- lum.u.stream.gid = usess->gid;
- 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));
+ /* Create directory */
+ ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG,
+ usess->uid, usess->gid);
if (ret < 0) {
- perror("send consumer metadata stream");
- goto error;
+ if (ret != -EEXIST) {
+ ERR("Trace directory creation error");
+ 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);
+ } else {
+ ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
+ consumer->subdir, usess->path);
if (ret < 0) {
- perror("send consumer stream");
+ 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);
+
+ /* 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;
+ }
+
+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,
+ struct consumer_output *consumer)
+{
+ int ret = 0;
+ int sock = consumer_fd;
+ struct lttng_ht_iter iter;
+ struct ust_app_channel *ua_chan;
+
+ DBG("Sending metadata stream fd");
+
+ if (consumer_fd < 0) {
+ ERR("Consumer has negative file descriptor");
+ return -EINVAL;
+ }
+
+ /* Sending metadata information to the consumer */
+ ret = ust_consumer_send_metadata(consumer_fd, usess, consumer);
+ if (ret < 0) {
+ goto error;
}
/* Send each channel fd streams of session */
continue;
}
- ret = send_channel_streams(sock, ua_chan, usess->uid, usess->gid);
+ ret = ust_consumer_send_channel_streams(sock, ua_chan, usess, consumer);
if (ret < 0) {
rcu_read_unlock();
goto error;
projects / lttng-tools.git / blobdiff