X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-abi.c;h=478a5912f89a0ebee71185885119bd3d85e1aff1;hb=715b31b70672fdf2606d7fc7d5d59a4c005d0c6b;hp=e046520e5f2a34357dbbffed484afc2ca978da9d;hpb=241ae9a8fb62c3ce467d244e280062c24e73eb7a;p=lttng-modules.git

diff --git a/lttng-abi.c b/lttng-abi.c
index e046520e..478a5912 100644
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -569,6 +569,8 @@ long lttng_session_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		return lttng_session_list_tracker_pids(session);
 	case LTTNG_KERNEL_SESSION_METADATA_REGEN:
 		return lttng_session_metadata_regenerate(session);
+	case LTTNG_KERNEL_SESSION_STATEDUMP:
+		return lttng_session_statedump(session);
 	default:
 		return -ENOIOCTLCMD;
 	}
@@ -702,6 +704,18 @@ long lttng_metadata_ring_buffer_ioctl(struct file *filp,
 
 		return put_u64(stream->version, arg);
 	}
+	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;
 	}
@@ -757,6 +771,39 @@ long lttng_metadata_ring_buffer_compat_ioctl(struct file *filp,
 		 */
 		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_GET_METADATA_VERSION:
+	{
+		struct lttng_metadata_stream *stream = filp->private_data;
+
+		return put_u64(stream->version, arg);
+	}
+	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;
 	}
@@ -774,12 +821,6 @@ long lttng_metadata_ring_buffer_compat_ioctl(struct file *filp,
 				cmd, arg);
 		break;
 	}
-	case RING_BUFFER_GET_METADATA_VERSION:
-	{
-		struct lttng_metadata_stream *stream = filp->private_data;
-
-		return put_u64(stream->version, arg);
-	}
 	default:
 		break;
 	}
@@ -957,8 +998,11 @@ int lttng_abi_open_metadata_stream(struct file *channel_file)
 		goto notransport;
 	}
 
-	if (!lttng_kref_get(&session->metadata_cache->refcount))
+	if (!lttng_kref_get(&session->metadata_cache->refcount)) {
+		ret = -EOVERFLOW;
 		goto kref_error;
+	}
+
 	ret = lttng_abi_create_stream_fd(channel_file, stream_priv,
 			&lttng_metadata_ring_buffer_file_operations);
 	if (ret < 0)
@@ -1017,6 +1061,7 @@ int lttng_abi_create_event(struct file *channel_file,
 	/* The event holds a reference on the channel */
 	if (atomic_long_add_unless(&channel_file->f_count,
 		1, INT_MAX) == INT_MAX) {
+		ret = -EOVERFLOW;
 		goto refcount_error;
 	}
 	if (event_param->instrumentation == LTTNG_KERNEL_TRACEPOINT