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diff --git a/src/ceph/src/tools/rbd_mirror/image_replayer/ReplayStatusFormatter.h b/src/ceph/src/tools/rbd_mirror/image_replayer/ReplayStatusFormatter.h
new file mode 100644
index 0000000..59940a6
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+++ b/src/ceph/src/tools/rbd_mirror/image_replayer/ReplayStatusFormatter.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef RBD_MIRROR_IMAGE_REPLAYER_REPLAY_STATUS_FORMATTER_H
+#define RBD_MIRROR_IMAGE_REPLAYER_REPLAY_STATUS_FORMATTER_H
+
+#include "include/Context.h"
+#include "common/Mutex.h"
+#include "cls/journal/cls_journal_types.h"
+#include "librbd/journal/Types.h"
+#include "librbd/journal/TypeTraits.h"
+
+namespace journal { class Journaler; }
+namespace librbd { class ImageCtx; }
+
+namespace rbd {
+namespace mirror {
+namespace image_replayer {
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class ReplayStatusFormatter {
+public:
+  typedef typename librbd::journal::TypeTraits<ImageCtxT>::Journaler Journaler;
+
+  static ReplayStatusFormatter* create(Journaler *journaler,
+				       const std::string &mirror_uuid) {
+    return new ReplayStatusFormatter(journaler, mirror_uuid);
+  }
+
+  static void destroy(ReplayStatusFormatter* formatter) {
+    delete formatter;
+  }
+
+  ReplayStatusFormatter(Journaler *journaler, const std::string &mirror_uuid);
+
+  bool get_or_send_update(std::string *description, Context *on_finish);
+
+private:
+  Journaler *m_journaler;
+  std::string m_mirror_uuid;
+  Mutex m_lock;
+  Context *m_on_finish = nullptr;
+  cls::journal::ObjectPosition m_master_position;
+  cls::journal::ObjectPosition m_mirror_position;
+  int m_entries_behind_master = 0;
+  cls::journal::Tag m_tag;
+  std::map<uint64_t, librbd::journal::TagData> m_tag_cache;
+
+  bool calculate_behind_master_or_send_update();
+  void send_update_tag_cache(uint64_t master_tag_tid, uint64_t mirror_tag_tid);
+  void handle_update_tag_cache(uint64_t master_tag_tid, uint64_t mirror_tag_tid,
+			       int r);
+  void format(std::string *description);
+};
+
+} // namespace image_replayer
+} // namespace mirror
+} // namespace rbd
+
+#endif // RBD_MIRROR_IMAGE_REPLAYER_REPLAY_STATUS_FORMATTER_H