initial code repo

[stor4nfv.git] / src / ceph / src / tools / rbd_mirror / InstanceReplayer.h

diff --git a/src/ceph/src/tools/rbd_mirror/InstanceReplayer.h b/src/ceph/src/tools/rbd_mirror/InstanceReplayer.h
new file mode 100644 (file)
index 0000000..4721f74
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+++ b/src/ceph/src/tools/rbd_mirror/InstanceReplayer.h
@@ -0,0 +1,124 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef RBD_MIRROR_INSTANCE_REPLAYER_H
+#define RBD_MIRROR_INSTANCE_REPLAYER_H
+
+#include <map>
+#include <sstream>
+
+#include "common/AsyncOpTracker.h"
+#include "common/Formatter.h"
+#include "common/Mutex.h"
+#include "types.h"
+
+namespace librbd { class ImageCtx; }
+
+namespace rbd {
+namespace mirror {
+
+template <typename> class ImageDeleter;
+template <typename> class ImageReplayer;
+template <typename> class InstanceWatcher;
+template <typename> class ServiceDaemon;
+template <typename> struct Threads;
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class InstanceReplayer {
+public:
+  static InstanceReplayer* create(
+      Threads<ImageCtxT> *threads,
+      ServiceDaemon<ImageCtxT>* service_daemon,
+      ImageDeleter<ImageCtxT>* image_deleter,
+      RadosRef local_rados, const std::string &local_mirror_uuid,
+      int64_t local_pool_id) {
+    return new InstanceReplayer(threads, service_daemon, image_deleter,
+                                local_rados, local_mirror_uuid, local_pool_id);
+  }
+  void destroy() {
+    delete this;
+  }
+
+  InstanceReplayer(Threads<ImageCtxT> *threads,
+                   ServiceDaemon<ImageCtxT>* service_daemon,
+                  ImageDeleter<ImageCtxT>* image_deleter,
+                  RadosRef local_rados, const std::string &local_mirror_uuid,
+                  int64_t local_pool_id);
+  ~InstanceReplayer();
+
+  int init();
+  void shut_down();
+
+  void init(Context *on_finish);
+  void shut_down(Context *on_finish);
+
+  void add_peer(std::string peer_uuid, librados::IoCtx io_ctx);
+
+  void acquire_image(InstanceWatcher<ImageCtxT> *instance_watcher,
+                     const std::string &global_image_id, Context *on_finish);
+  void release_image(const std::string &global_image_id, Context *on_finish);
+  void remove_peer_image(const std::string &global_image_id,
+                         const std::string &peer_mirror_uuid,
+                         Context *on_finish);
+
+  void release_all(Context *on_finish);
+
+  void print_status(Formatter *f, stringstream *ss);
+  void start();
+  void stop();
+  void restart();
+  void flush();
+
+private:
+  /**
+   * @verbatim
+   *
+   * <uninitialized> <-------------------\
+   *    | (init)                         |                    (repeat for each
+   *    v                             STOP_IMAGE_REPLAYER ---\ image replayer)
+   * SCHEDULE_IMAGE_STATE_CHECK_TASK     ^         ^         |
+   *    |                                |         |         |
+   *    v          (shut_down)           |         \---------/
+   * <initialized> -----------------> WAIT_FOR_OPS
+   *
+   * @endverbatim
+   */
+
+  Threads<ImageCtxT> *m_threads;
+  ServiceDaemon<ImageCtxT>* m_service_daemon;
+  ImageDeleter<ImageCtxT>* m_image_deleter;
+  RadosRef m_local_rados;
+  std::string m_local_mirror_uuid;
+  int64_t m_local_pool_id;
+
+  Mutex m_lock;
+  AsyncOpTracker m_async_op_tracker;
+  std::map<std::string, ImageReplayer<ImageCtxT> *> m_image_replayers;
+  Peers m_peers;
+  Context *m_image_state_check_task = nullptr;
+  Context *m_on_shut_down = nullptr;
+  bool m_manual_stop = false;
+
+  void wait_for_ops();
+  void handle_wait_for_ops(int r);
+
+  void start_image_replayer(ImageReplayer<ImageCtxT> *image_replayer);
+  void queue_start_image_replayers();
+  void start_image_replayers(int r);
+
+  void stop_image_replayer(ImageReplayer<ImageCtxT> *image_replayer,
+                           Context *on_finish);
+
+  void stop_image_replayers();
+  void handle_stop_image_replayers(int r);
+
+  void schedule_image_state_check_task();
+  void cancel_image_state_check_task();
+};
+
+} // namespace mirror
+} // namespace rbd
+
+extern template class rbd::mirror::InstanceReplayer<librbd::ImageCtx>;
+
+#endif // RBD_MIRROR_INSTANCE_REPLAYER_H