if (finalized)
mask |= POLLHUP;
+ mutex_lock(&stream->metadata_cache->lock);
if (stream->metadata_cache->metadata_written >
stream->metadata_out)
mask |= POLLIN;
+ mutex_unlock(&stream->metadata_cache->lock);
}
return mask;
goto err;
break;
}
+ case RING_BUFFER_SNAPSHOT:
+ {
+ /*
+ * Force the buffer to quiescent so the ring buffer
+ * don't attempt to perform a SWITCH_FLUSH, which would
+ * desynchronize the client accounting of the amount of
+ * data available in the buffer from the ring buffer
+ * view.
+ */
+ buf->quiescent = true;
+ break;
+ }
default:
break;
}
*/
return -ENOSYS;
}
+ case RING_BUFFER_FLUSH:
+ {
+ struct lttng_metadata_stream *stream = filp->private_data;
+ struct lib_ring_buffer *buf = stream->priv;
+ struct channel *chan = buf->backend.chan;
+
+ /*
+ * Before doing the actual ring buffer flush, write up to one
+ * packet of metadata in the ring buffer.
+ */
+ ret = lttng_metadata_output_channel(stream, chan);
+ if (ret < 0)
+ goto err;
+ break;
+ }
+ case RING_BUFFER_SNAPSHOT:
+ {
+ /*
+ * Force the buffer to quiescent so the ring buffer
+ * don't attempt to perform a SWITCH_FLUSH, which would
+ * desynchronize the client accounting of the amount of
+ * data available in the buffer from the ring buffer
+ * view.
+ */
+ buf->quiescent = true;
+ break;
+ }
default:
break;
}
metadata_stream->priv = buf;
stream_priv = metadata_stream;
metadata_stream->transport = channel->transport;
- mutex_init(&metadata_stream->lock);
/*
* Since life-time of metadata cache differs from that of
struct lttng_channel *channel = file->private_data;
if (channel) {
- lttng_metadata_channel_destroy(channel);
fput(channel->session->file);
+ lttng_metadata_channel_destroy(channel);
}
return 0;