1 files changed, 53 insertions, 0 deletions
diff --git a/src/librbd/migration/FormatInterface.h b/src/librbd/migration/FormatInterface.h
new file mode 100644
index 000000000..d13521d11
--- /dev/null
+++ b/src/librbd/migration/FormatInterface.h
@@ -0,0 +1,53 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_MIGRATION_FORMAT_INTERFACE_H
+#define CEPH_LIBRBD_MIGRATION_FORMAT_INTERFACE_H
+
+#include "include/buffer_fwd.h"
+#include "include/int_types.h"
+#include "common/zipkin_trace.h"
+#include "librbd/Types.h"
+#include "librbd/io/Types.h"
+#include <map>
+
+struct Context;
+
+namespace librbd {
+
+namespace io {
+struct AioCompletion;
+struct ReadResult;
+} // namespace io
+
+namespace migration {
+
+struct FormatInterface {
+  typedef std::map<uint64_t, SnapInfo> SnapInfos;
+
+  virtual ~FormatInterface() {
+  }
+
+  virtual void open(Context* on_finish) = 0;
+  virtual void close(Context* on_finish) = 0;
+
+  virtual void get_snapshots(SnapInfos* snap_infos, Context* on_finish) = 0;
+  virtual void get_image_size(uint64_t snap_id, uint64_t* size,
+                              Context* on_finish) = 0;
+
+  virtual bool read(io::AioCompletion* aio_comp, uint64_t snap_id,
+                    io::Extents&& image_extents, io::ReadResult&& read_result,
+                    int op_flags, int read_flags,
+                    const ZTracer::Trace &parent_trace) = 0;
+
+  virtual void list_snaps(io::Extents&& image_extents, io::SnapIds&& snap_ids,
+                          int list_snaps_flags,
+                          io::SnapshotDelta* snapshot_delta,
+                          const ZTracer::Trace &parent_trace,
+                          Context* on_finish) = 0;
+};
+
+} // namespace migration
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_MIGRATION_FORMAT_INTERFACE_H