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diff --git a/src/ceph/src/librbd/mirroring_watcher/Types.h b/src/ceph/src/librbd/mirroring_watcher/Types.h
new file mode 100644
index 0000000..16bf5b6
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+++ b/src/ceph/src/librbd/mirroring_watcher/Types.h
@@ -0,0 +1,102 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_MIRRORING_WATCHER_TYPES_H
+#define CEPH_LIBRBD_MIRRORING_WATCHER_TYPES_H
+
+#include "include/int_types.h"
+#include "include/buffer_fwd.h"
+#include "include/encoding.h"
+#include "cls/rbd/cls_rbd_types.h"
+#include <iosfwd>
+#include <list>
+#include <string>
+#include <boost/variant.hpp>
+
+namespace ceph { class Formatter; }
+
+namespace librbd {
+namespace mirroring_watcher {
+
+enum NotifyOp {
+  NOTIFY_OP_MODE_UPDATED  = 0,
+  NOTIFY_OP_IMAGE_UPDATED = 1
+};
+
+struct ModeUpdatedPayload {
+  static const NotifyOp NOTIFY_OP = NOTIFY_OP_MODE_UPDATED;
+
+  cls::rbd::MirrorMode mirror_mode = cls::rbd::MIRROR_MODE_DISABLED;
+
+  ModeUpdatedPayload() {
+  }
+  ModeUpdatedPayload(cls::rbd::MirrorMode mirror_mode)
+    : mirror_mode(mirror_mode) {
+  }
+
+  void encode(bufferlist &bl) const;
+  void decode(__u8 version, bufferlist::iterator &iter);
+  void dump(Formatter *f) const;
+};
+
+struct ImageUpdatedPayload {
+  static const NotifyOp NOTIFY_OP = NOTIFY_OP_IMAGE_UPDATED;
+
+  cls::rbd::MirrorImageState mirror_image_state =
+    cls::rbd::MIRROR_IMAGE_STATE_ENABLED;
+  std::string image_id;
+  std::string global_image_id;
+
+  ImageUpdatedPayload() {
+  }
+  ImageUpdatedPayload(cls::rbd::MirrorImageState mirror_image_state,
+                      const std::string &image_id,
+                      const std::string &global_image_id)
+    : mirror_image_state(mirror_image_state), image_id(image_id),
+      global_image_id(global_image_id) {
+  }
+
+  void encode(bufferlist &bl) const;
+  void decode(__u8 version, bufferlist::iterator &iter);
+  void dump(Formatter *f) const;
+};
+
+struct UnknownPayload {
+  static const NotifyOp NOTIFY_OP = static_cast<NotifyOp>(-1);
+
+  UnknownPayload() {
+  }
+
+  void encode(bufferlist &bl) const;
+  void decode(__u8 version, bufferlist::iterator &iter);
+  void dump(Formatter *f) const;
+};
+
+typedef boost::variant<ModeUpdatedPayload,
+                       ImageUpdatedPayload,
+                       UnknownPayload> Payload;
+
+struct NotifyMessage {
+  NotifyMessage(const Payload &payload = UnknownPayload()) : payload(payload) {
+  }
+
+  Payload payload;
+
+  void encode(bufferlist& bl) const;
+  void decode(bufferlist::iterator& it);
+  void dump(Formatter *f) const;
+
+  static void generate_test_instances(std::list<NotifyMessage *> &o);
+};
+
+WRITE_CLASS_ENCODER(NotifyMessage);
+
+std::ostream &operator<<(std::ostream &out, const NotifyOp &op);
+
+} // namespace mirroring_watcher
+} // namespace librbd
+
+using librbd::mirroring_watcher::encode;
+using librbd::mirroring_watcher::decode;
+
+#endif // CEPH_LIBRBD_MIRRORING_WATCHER_TYPES_H