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diff --git a/src/ceph/src/tools/rbd_mirror/PoolReplayer.h b/src/ceph/src/tools/rbd_mirror/PoolReplayer.h
new file mode 100644
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+++ b/src/ceph/src/tools/rbd_mirror/PoolReplayer.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 CEPH_RBD_MIRROR_POOL_REPLAYER_H
+#define CEPH_RBD_MIRROR_POOL_REPLAYER_H
+
+#include "common/AsyncOpTracker.h"
+#include "common/Cond.h"
+#include "common/Mutex.h"
+#include "common/WorkQueue.h"
+#include "include/rados/librados.hpp"
+
+#include "ClusterWatcher.h"
+#include "LeaderWatcher.h"
+#include "PoolWatcher.h"
+#include "ImageDeleter.h"
+#include "types.h"
+#include "tools/rbd_mirror/service_daemon/Types.h"
+
+#include <set>
+#include <map>
+#include <memory>
+#include <atomic>
+#include <string>
+
+class AdminSocketHook;
+
+namespace librbd { class ImageCtx; }
+
+namespace rbd {
+namespace mirror {
+
+template <typename> class InstanceReplayer;
+template <typename> class InstanceWatcher;
+template <typename> class ServiceDaemon;
+template <typename> struct Threads;
+
+/**
+ * Controls mirroring for a single remote cluster.
+ */
+class PoolReplayer {
+public:
+  PoolReplayer(Threads<librbd::ImageCtx> *threads,
+               ServiceDaemon<librbd::ImageCtx>* service_daemon,
+	       ImageDeleter<>* image_deleter,
+	       int64_t local_pool_id, const peer_t &peer,
+	       const std::vector<const char*> &args);
+  ~PoolReplayer();
+  PoolReplayer(const PoolReplayer&) = delete;
+  PoolReplayer& operator=(const PoolReplayer&) = delete;
+
+  bool is_blacklisted() const;
+  bool is_leader() const;
+  bool is_running() const;
+
+  void init();
+  void shut_down();
+
+  void run();
+
+  void print_status(Formatter *f, stringstream *ss);
+  void start();
+  void stop(bool manual);
+  void restart();
+  void flush();
+  void release_leader();
+
+private:
+  struct PoolWatcherListener : public PoolWatcher<>::Listener {
+    PoolReplayer *pool_replayer;
+    bool local;
+
+    PoolWatcherListener(PoolReplayer *pool_replayer, bool local)
+      : pool_replayer(pool_replayer), local(local) {
+    }
+
+    void handle_update(const std::string &mirror_uuid,
+                       ImageIds &&added_image_ids,
+                       ImageIds &&removed_image_ids) override {
+      pool_replayer->handle_update((local ? "" : mirror_uuid),
+				   std::move(added_image_ids),
+                                   std::move(removed_image_ids));
+    }
+  };
+
+  void handle_update(const std::string &mirror_uuid,
+                     ImageIds &&added_image_ids,
+                     ImageIds &&removed_image_ids);
+
+  int init_rados(const std::string &cluster_name,
+                 const std::string &client_name,
+                 const std::string &description, RadosRef *rados_ref,
+                 bool strip_cluster_overrides);
+
+  void handle_post_acquire_leader(Context *on_finish);
+  void handle_pre_release_leader(Context *on_finish);
+
+  void init_local_pool_watcher(Context *on_finish);
+  void handle_init_local_pool_watcher(int r, Context *on_finish);
+
+  void init_remote_pool_watcher(Context *on_finish);
+
+  void shut_down_pool_watchers(Context *on_finish);
+  void handle_shut_down_pool_watchers(int r, Context *on_finish);
+
+  void wait_for_update_ops(Context *on_finish);
+  void handle_wait_for_update_ops(int r, Context *on_finish);
+
+  void handle_update_leader(const std::string &leader_instance_id);
+
+  Threads<librbd::ImageCtx> *m_threads;
+  ServiceDaemon<librbd::ImageCtx>* m_service_daemon;
+  ImageDeleter<>* m_image_deleter;
+  int64_t m_local_pool_id = -1;
+  peer_t m_peer;
+  std::vector<const char*> m_args;
+
+  mutable Mutex m_lock;
+  Cond m_cond;
+  std::atomic<bool> m_stopping = { false };
+  bool m_manual_stop = false;
+  bool m_blacklisted = false;
+
+  RadosRef m_local_rados;
+  RadosRef m_remote_rados;
+
+  librados::IoCtx m_local_io_ctx;
+  librados::IoCtx m_remote_io_ctx;
+
+  PoolWatcherListener m_local_pool_watcher_listener;
+  std::unique_ptr<PoolWatcher<> > m_local_pool_watcher;
+
+  PoolWatcherListener m_remote_pool_watcher_listener;
+  std::unique_ptr<PoolWatcher<> > m_remote_pool_watcher;
+
+  std::unique_ptr<InstanceReplayer<librbd::ImageCtx>> m_instance_replayer;
+
+  std::string m_asok_hook_name;
+  AdminSocketHook *m_asok_hook = nullptr;
+
+  service_daemon::CalloutId m_callout_id = service_daemon::CALLOUT_ID_NONE;
+
+  class PoolReplayerThread : public Thread {
+    PoolReplayer *m_pool_replayer;
+  public:
+    PoolReplayerThread(PoolReplayer *pool_replayer)
+      : m_pool_replayer(pool_replayer) {
+    }
+    void *entry() override {
+      m_pool_replayer->run();
+      return 0;
+    }
+  } m_pool_replayer_thread;
+
+  class LeaderListener : public LeaderWatcher<>::Listener {
+  public:
+    LeaderListener(PoolReplayer *pool_replayer)
+      : m_pool_replayer(pool_replayer) {
+    }
+
+  protected:
+    void post_acquire_handler(Context *on_finish) override {
+      m_pool_replayer->handle_post_acquire_leader(on_finish);
+    }
+
+    void pre_release_handler(Context *on_finish) override {
+      m_pool_replayer->handle_pre_release_leader(on_finish);
+    }
+
+    void update_leader_handler(
+      const std::string &leader_instance_id) override {
+      m_pool_replayer->handle_update_leader(leader_instance_id);
+    }
+
+  private:
+    PoolReplayer *m_pool_replayer;
+  } m_leader_listener;
+
+  std::unique_ptr<LeaderWatcher<> > m_leader_watcher;
+  std::unique_ptr<InstanceWatcher<librbd::ImageCtx> > m_instance_watcher;
+  AsyncOpTracker m_update_op_tracker;
+};
+
+} // namespace mirror
+} // namespace rbd
+
+#endif // CEPH_RBD_MIRROR_POOL_REPLAYER_H