1 files changed, 50 insertions, 0 deletions
diff --git a/src/librbd/deep_copy/Handler.h b/src/librbd/deep_copy/Handler.h
new file mode 100644
index 000000000..fea553ee2
--- /dev/null
+++ b/src/librbd/deep_copy/Handler.h
@@ -0,0 +1,50 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_DEEP_COPY_HANDLER_H
+#define CEPH_LIBRBD_DEEP_COPY_HANDLER_H
+
+#include "include/int_types.h"
+#include "include/rbd/librbd.hpp"
+
+namespace librbd {
+namespace deep_copy {
+
+struct Handler {
+  virtual ~Handler() {}
+
+  virtual void handle_read(uint64_t bytes_read) = 0;
+
+  virtual int update_progress(uint64_t object_number,
+                              uint64_t object_count) = 0;
+};
+
+struct NoOpHandler : public Handler {
+  void handle_read(uint64_t bytes_read) override {
+  }
+
+  int update_progress(uint64_t object_number,
+                      uint64_t object_count) override {
+    return 0;
+  }
+};
+
+class ProgressHandler : public NoOpHandler {
+public:
+  ProgressHandler(ProgressContext* progress_ctx)
+    : m_progress_ctx(progress_ctx) {
+  }
+
+  int update_progress(uint64_t object_number,
+                      uint64_t object_count) override {
+    return m_progress_ctx->update_progress(object_number, object_count);
+  }
+
+private:
+  librbd::ProgressContext* m_progress_ctx;
+};
+
+} // namespace deep_copy
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_DEEP_COPY_HANDLER_H