#include <common/sessiond-comm/sessiond-comm.h>
#include <common/sessiond-comm/relayd.h>
#include <common/compat/fcntl.h>
+#include <common/pipe.h>
#include <common/relayd/relayd.h>
#include <common/utils.h>
return ret;
}
+/*
+ * Receive command from session daemon and process it.
+ *
+ * Return 1 on success else a negative value or 0.
+ */
int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
int sock, struct pollfd *consumer_sockpoll)
{
ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg));
if (ret != sizeof(msg)) {
lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD);
+ if (ret > 0) {
+ ret = -1;
+ }
return ret;
}
if (msg.cmd_type == LTTNG_CONSUMER_STOP) {
case LTTNG_CONSUMER_ADD_CHANNEL:
{
struct lttng_consumer_channel *new_channel;
+ int ret_recv;
/* First send a status message before receiving the fds. */
ret = consumer_send_status_msg(sock, ret_code);
if (ret < 0) {
/* Somehow, the session daemon is not responding anymore. */
- goto end_nosignal;
+ goto error_fatal;
}
-
DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key);
new_channel = consumer_allocate_channel(msg.u.channel.channel_key,
msg.u.channel.session_id, msg.u.channel.pathname,
msg.u.channel.name, msg.u.channel.uid, msg.u.channel.gid,
msg.u.channel.relayd_id, msg.u.channel.output,
msg.u.channel.tracefile_size,
- msg.u.channel.tracefile_count);
+ msg.u.channel.tracefile_count,
+ msg.u.channel.monitor);
if (new_channel == NULL) {
lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR);
goto end_nosignal;
};
if (ctx->on_recv_channel != NULL) {
- ret = ctx->on_recv_channel(new_channel);
- if (ret == 0) {
- consumer_add_channel(new_channel, ctx);
- } else if (ret < 0) {
+ ret_recv = ctx->on_recv_channel(new_channel);
+ if (ret_recv == 0) {
+ ret = consumer_add_channel(new_channel, ctx);
+ } else if (ret_recv < 0) {
goto end_nosignal;
}
} else {
- consumer_add_channel(new_channel, ctx);
+ ret = consumer_add_channel(new_channel, ctx);
}
+
+ /* If we received an error in add_channel, we need to report it. */
+ if (ret < 0) {
+ ret = consumer_send_status_msg(sock, ret);
+ if (ret < 0) {
+ goto error_fatal;
+ }
+ goto end_nosignal;
+ }
+
goto end_nosignal;
}
case LTTNG_CONSUMER_ADD_STREAM:
{
- int fd, stream_pipe;
+ int fd;
+ struct lttng_pipe *stream_pipe;
struct consumer_relayd_sock_pair *relayd = NULL;
struct lttng_consumer_stream *new_stream;
struct lttng_consumer_channel *channel;
/* First send a status message before receiving the fds. */
ret = consumer_send_status_msg(sock, ret_code);
- if (ret < 0 || ret_code != LTTNG_OK) {
+ if (ret < 0) {
/*
- * Somehow, the session daemon is not responding anymore or the
- * channel was not found.
+ * Somehow, the session daemon is not responding
+ * anymore.
+ */
+ goto error_fatal;
+ }
+ if (ret_code != LTTNG_OK) {
+ /*
+ * Channel was not found.
*/
goto end_nosignal;
}
new_stream->chan = channel;
new_stream->wait_fd = fd;
+ /*
+ * We've just assigned the channel to the stream so increment the
+ * refcount right now.
+ */
+ uatomic_inc(&new_stream->chan->refcount);
+
/*
* The buffer flush is done on the session daemon side for the kernel
* so no need for the stream "hangup_flush_done" variable to be
pthread_mutex_lock(&relayd->ctrl_sock_mutex);
ret = relayd_add_stream(&relayd->control_sock,
new_stream->name, new_stream->chan->pathname,
- &new_stream->relayd_stream_id);
+ &new_stream->relayd_stream_id,
+ new_stream->chan->tracefile_size,
+ new_stream->chan->tracefile_count);
pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
if (ret < 0) {
consumer_del_stream(new_stream, NULL);
}
}
+ /* Do not monitor this stream. */
+ if (!channel->monitor) {
+ DBG("Kernel consumer add stream %s in no monitor mode with"
+ "relayd id %" PRIu64, new_stream->name,
+ new_stream->relayd_stream_id);
+ break;
+ }
+
/* Get the right pipe where the stream will be sent. */
if (new_stream->metadata_flag) {
- stream_pipe = ctx->consumer_metadata_pipe[1];
+ stream_pipe = ctx->consumer_metadata_pipe;
} else {
- stream_pipe = ctx->consumer_data_pipe[1];
+ stream_pipe = ctx->consumer_data_pipe;
}
- do {
- ret = write(stream_pipe, &new_stream, sizeof(new_stream));
- } while (ret < 0 && errno == EINTR);
+ ret = lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream));
if (ret < 0) {
- PERROR("Consumer write %s stream to pipe %d",
+ ERR("Consumer write %s stream to pipe %d",
new_stream->metadata_flag ? "metadata" : "data",
- stream_pipe);
+ lttng_pipe_get_writefd(stream_pipe));
consumer_del_stream(new_stream, NULL);
goto end_nosignal;
}
ret = consumer_send_status_msg(sock, ret_code);
if (ret < 0) {
/* Somehow, the session daemon is not responding anymore. */
- goto end_nosignal;
+ goto error_fatal;
}
goto end_nosignal;
ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret));
if (ret < 0) {
PERROR("send data pending ret code");
+ goto error_fatal;
}
/*
*/
break;
}
+ case LTTNG_CONSUMER_SNAPSHOT_CHANNEL:
+ {
+ ret = consumer_send_status_msg(sock, ret_code);
+ if (ret < 0) {
+ /* Somehow, the session daemon is not responding anymore. */
+ goto end_nosignal;
+ }
+ break;
+ }
default:
goto end_nosignal;
}
* shutdown during the recv() or send() call.
*/
return 1;
+
+error_fatal:
+ rcu_read_unlock();
+ /* This will issue a consumer stop. */
+ return -1;
}
/*
assert(stream);
- /* Don't create anything if this is set for streaming. */
- if (stream->net_seq_idx == (uint64_t) -1ULL) {
+ /*
+ * Don't create anything if this is set for streaming or should not be
+ * monitored.
+ */
+ if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor) {
ret = utils_create_stream_file(stream->chan->pathname, stream->name,
stream->chan->tracefile_size, stream->tracefile_count_current,
stream->uid, stream->gid);
projects / lttng-tools.git / blobdiff