return ret;
}
- DBG("consumer_add_stream chan %d stream %d",
- msg.u.stream.channel_key,
- msg.u.stream.stream_key);
+ DBG("Consumer command ADD_STREAM chan %d stream %d",
+ msg.u.stream.channel_key, msg.u.stream.stream_key);
assert(msg.u.stream.output == LTTNG_EVENT_MMAP);
new_stream = consumer_allocate_stream(msg.u.stream.channel_key,
&new_stream->relayd_stream_id);
pthread_mutex_unlock(&relayd->ctrl_sock_mutex);
if (ret < 0) {
+ consumer_del_stream(new_stream, NULL);
goto end_nosignal;
}
} else if (msg.u.stream.net_index != -1) {
ERR("Network sequence index %d unknown. Not adding stream.",
msg.u.stream.net_index);
- free(new_stream);
+ consumer_del_stream(new_stream, NULL);
goto end_nosignal;
}
- /* Send stream to the metadata thread */
- if (new_stream->metadata_flag) {
- if (ctx->on_recv_stream) {
- ret = ctx->on_recv_stream(new_stream);
- if (ret < 0) {
- goto end_nosignal;
- }
+ /* Do actions once stream has been received. */
+ if (ctx->on_recv_stream) {
+ ret = ctx->on_recv_stream(new_stream);
+ if (ret < 0) {
+ consumer_del_stream(new_stream, NULL);
+ goto end_nosignal;
}
+ }
+ /* Send stream to the metadata thread */
+ if (new_stream->metadata_flag) {
do {
- ret = write(ctx->consumer_metadata_pipe[1], new_stream,
- sizeof(struct lttng_consumer_stream));
+ ret = write(ctx->consumer_metadata_pipe[1], &new_stream,
+ sizeof(new_stream));
} while (ret < 0 && errno == EINTR);
if (ret < 0) {
PERROR("write metadata pipe");
+ consumer_del_metadata_stream(new_stream, NULL);
+ goto end_nosignal;
}
} else {
- if (ctx->on_recv_stream) {
- ret = ctx->on_recv_stream(new_stream);
- if (ret < 0) {
- goto end_nosignal;
- }
+ do {
+ ret = write(ctx->consumer_poll_pipe[1], &new_stream,
+ sizeof(new_stream));
+ } while (ret < 0 && errno == EINTR);
+ if (ret < 0) {
+ PERROR("write data pipe");
+ consumer_del_stream(new_stream, NULL);
+ goto end_nosignal;
}
- consumer_add_stream(new_stream);
}
DBG("UST consumer_add_stream %s (%d,%d) with relayd id %" PRIu64,
break;
}
- /*
- * Wake-up the other end by writing a null byte in the pipe (non-blocking).
- * Important note: Because writing into the pipe is non-blocking (and
- * therefore we allow dropping wakeup data, as long as there is wakeup data
- * present in the pipe buffer to wake up the other end), the other end
- * should perform the following sequence for waiting:
- *
- * 1) empty the pipe (reads).
- * 2) perform update operation.
- * 3) wait on the pipe (poll).
- */
- do {
- ret = write(ctx->consumer_poll_pipe[1], "", 1);
- } while (ret < 0 && errno == EINTR);
end_nosignal:
rcu_read_unlock();
ustctl_unmap_channel(chan->handle);
}
-int lttng_ustconsumer_allocate_stream(struct lttng_consumer_stream *stream)
+int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream)
{
struct lttng_ust_object_data obj;
int ret;
obj.wait_fd = stream->wait_fd;
obj.memory_map_size = stream->mmap_len;
ret = ustctl_add_stream(stream->chan->handle, &obj);
- if (ret)
- return ret;
+ if (ret) {
+ ERR("UST ctl add_stream failed with ret %d", ret);
+ goto error;
+ }
+
stream->buf = ustctl_open_stream_read(stream->chan->handle, stream->cpu);
- if (!stream->buf)
- return -EBUSY;
+ if (!stream->buf) {
+ ERR("UST ctl open_stream_read failed");
+ ret = -EBUSY;
+ goto error;
+ }
+
/* ustctl_open_stream_read has closed the shm fd. */
stream->wait_fd_is_copy = 1;
stream->shm_fd = -1;
stream->mmap_base = ustctl_get_mmap_base(stream->chan->handle, stream->buf);
if (!stream->mmap_base) {
- return -EINVAL;
+ ERR("UST ctl get_mmap_base failed");
+ ret = -EINVAL;
+ goto mmap_error;
}
return 0;
+
+mmap_error:
+ ustctl_close_stream_read(stream->chan->handle, stream->buf);
+error:
+ return ret;
}
void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream)
ERR("Error writing to tracefile "
"(ret: %zd != len: %lu != subbuf_size: %lu)",
ret, len, subbuf_size);
-
}
err = ustctl_put_next_subbuf(handle, buf);
assert(err == 0);
stream->out_fd = ret;
}
+ ret = lttng_ustconsumer_add_stream(stream);
+ if (ret) {
+ consumer_del_stream(stream, NULL);
+ ret = -1;
+ goto error;
+ }
+
/* we return 0 to let the library handle the FD internally */
return 0;