1 files changed, 68 insertions, 0 deletions
diff --git a/src/librbd/operation/MigrateRequest.h b/src/librbd/operation/MigrateRequest.h
new file mode 100644
index 000000000..a143b579c
--- /dev/null
+++ b/src/librbd/operation/MigrateRequest.h
@@ -0,0 +1,68 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+#ifndef CEPH_LIBRBD_OPERATION_MIGRATE_REQUEST_H
+#define CEPH_LIBRBD_OPERATION_MIGRATE_REQUEST_H
+
+#include "librbd/operation/Request.h"
+#include "librbd/Types.h"
+
+namespace librbd {
+
+class ImageCtx;
+class ProgressContext;
+
+namespace operation {
+
+template <typename ImageCtxT = ImageCtx>
+class MigrateRequest : public Request<ImageCtxT>
+{
+public:
+  MigrateRequest(ImageCtxT &image_ctx, Context *on_finish,
+                 ProgressContext &prog_ctx)
+    : Request<ImageCtxT>(image_ctx, on_finish), m_prog_ctx(prog_ctx) {
+  }
+
+protected:
+  void send_op() override;
+  bool should_complete(int r) override;
+  bool can_affect_io() const override {
+    return true;
+  }
+  journal::Event create_event(uint64_t op_tid) const override {
+    ceph_abort();
+    return journal::UnknownEvent();
+  }
+
+private:
+  /**
+   * Migrate goes through the following state machine to copy objects
+   * from the parent (migrating source) image:
+   *
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * MIGRATE_OBJECTS
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   *
+   */
+
+  ProgressContext &m_prog_ctx;
+
+  void migrate_objects();
+  void handle_migrate_objects(int r);
+
+  uint64_t get_num_overlap_objects();
+};
+
+} // namespace operation
+} // namespace librbd
+
+extern template class librbd::operation::MigrateRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_OPERATION_MIGRATE_REQUEST_H