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diff --git a/src/ceph/src/tools/rbd_mirror/leader_watcher/Types.h b/src/ceph/src/tools/rbd_mirror/leader_watcher/Types.h
new file mode 100644
index 0000000..b6b3849
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+++ b/src/ceph/src/tools/rbd_mirror/leader_watcher/Types.h
@@ -0,0 +1,97 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef RBD_MIRROR_LEADER_WATCHER_TYPES_H
+#define RBD_MIRROR_LEADER_WATCHER_TYPES_H
+
+#include "include/int_types.h"
+#include "include/buffer_fwd.h"
+#include "include/encoding.h"
+#include <boost/variant.hpp>
+
+namespace ceph { class Formatter; }
+
+namespace rbd {
+namespace mirror {
+namespace leader_watcher {
+
+enum NotifyOp {
+  NOTIFY_OP_HEARTBEAT        = 0,
+  NOTIFY_OP_LOCK_ACQUIRED    = 1,
+  NOTIFY_OP_LOCK_RELEASED    = 2,
+};
+
+struct HeartbeatPayload {
+  static const NotifyOp NOTIFY_OP = NOTIFY_OP_HEARTBEAT;
+
+  HeartbeatPayload() {
+  }
+
+  void encode(bufferlist &bl) const;
+  void decode(__u8 version, bufferlist::iterator &iter);
+  void dump(Formatter *f) const;
+};
+
+struct LockAcquiredPayload {
+  static const NotifyOp NOTIFY_OP = NOTIFY_OP_LOCK_ACQUIRED;
+
+  LockAcquiredPayload() {
+  }
+
+  void encode(bufferlist &bl) const;
+  void decode(__u8 version, bufferlist::iterator &iter);
+  void dump(Formatter *f) const;
+};
+
+struct LockReleasedPayload {
+  static const NotifyOp NOTIFY_OP = NOTIFY_OP_LOCK_RELEASED;
+
+  LockReleasedPayload() {
+  }
+
+  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<HeartbeatPayload,
+                       LockAcquiredPayload,
+                       LockReleasedPayload,
+                       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 leader_watcher
+} // namespace mirror
+} // namespace librbd
+
+using rbd::mirror::leader_watcher::encode;
+using rbd::mirror::leader_watcher::decode;
+
+#endif // RBD_MIRROR_LEADER_WATCHER_TYPES_H