initial code repo

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

diff --git a/src/ceph/src/tools/rbd_mirror/ImageSync.h b/src/ceph/src/tools/rbd_mirror/ImageSync.h
new file mode 100644 (file)
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+++ b/src/ceph/src/tools/rbd_mirror/ImageSync.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_SYNC_H
+#define RBD_MIRROR_IMAGE_SYNC_H
+
+#include "include/int_types.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/journal/TypeTraits.h"
+#include "common/Mutex.h"
+#include "tools/rbd_mirror/BaseRequest.h"
+#include <map>
+#include <vector>
+
+class Context;
+class ContextWQ;
+class Mutex;
+class SafeTimer;
+namespace journal { class Journaler; }
+namespace librbd { namespace journal { struct MirrorPeerClientMeta; } }
+
+namespace rbd {
+namespace mirror {
+
+class ProgressContext;
+
+template <typename> class InstanceWatcher;
+
+namespace image_sync { template <typename> class ImageCopyRequest; }
+namespace image_sync { template <typename> class SnapshotCopyRequest; }
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class ImageSync : public BaseRequest {
+public:
+  typedef librbd::journal::TypeTraits<ImageCtxT> TypeTraits;
+  typedef typename TypeTraits::Journaler Journaler;
+  typedef librbd::journal::MirrorPeerClientMeta MirrorPeerClientMeta;
+
+  static ImageSync* create(ImageCtxT *local_image_ctx,
+                           ImageCtxT *remote_image_ctx, SafeTimer *timer,
+                           Mutex *timer_lock, const std::string &mirror_uuid,
+                           Journaler *journaler,
+                           MirrorPeerClientMeta *client_meta,
+                           ContextWQ *work_queue,
+                           InstanceWatcher<ImageCtxT> *instance_watcher,
+                           Context *on_finish,
+                           ProgressContext *progress_ctx = nullptr) {
+    return new ImageSync(local_image_ctx, remote_image_ctx, timer, timer_lock,
+                         mirror_uuid, journaler, client_meta, work_queue,
+                         instance_watcher, on_finish, progress_ctx);
+  }
+
+  ImageSync(ImageCtxT *local_image_ctx, ImageCtxT *remote_image_ctx,
+            SafeTimer *timer, Mutex *timer_lock, const std::string &mirror_uuid,
+            Journaler *journaler, MirrorPeerClientMeta *client_meta,
+            ContextWQ *work_queue, InstanceWatcher<ImageCtxT> *instance_watcher,
+            Context *on_finish, ProgressContext *progress_ctx = nullptr);
+  ~ImageSync() override;
+
+  void send() override;
+  void cancel() override;
+
+protected:
+  void finish(int r) override;
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * NOTIFY_SYNC_REQUEST
+   *    |
+   *    v
+   * PRUNE_CATCH_UP_SYNC_POINT
+   *    |
+   *    v
+   * CREATE_SYNC_POINT (skip if already exists and
+   *    |               not disconnected)
+   *    v
+   * COPY_SNAPSHOTS
+   *    |
+   *    v
+   * COPY_IMAGE . . . . . . . . . . . . . .
+   *    |                                 .
+   *    v                                 .
+   * COPY_OBJECT_MAP (skip if object      .
+   *    |             map disabled)       .
+   *    v                                 .
+   * REFRESH_OBJECT_MAP (skip if object   .
+   *    |                map disabled)    .
+   *    v
+   * PRUNE_SYNC_POINTS                    . (image sync canceled)
+   *    |                                 .
+   *    v                                 .
+   * <finish> < . . . . . . . . . . . . . .
+   *
+   * @endverbatim
+   */
+
+  typedef std::vector<librados::snap_t> SnapIds;
+  typedef std::map<librados::snap_t, SnapIds> SnapMap;
+
+  ImageCtxT *m_local_image_ctx;
+  ImageCtxT *m_remote_image_ctx;
+  SafeTimer *m_timer;
+  Mutex *m_timer_lock;
+  std::string m_mirror_uuid;
+  Journaler *m_journaler;
+  MirrorPeerClientMeta *m_client_meta;
+  ContextWQ *m_work_queue;
+  InstanceWatcher<ImageCtxT> *m_instance_watcher;
+  ProgressContext *m_progress_ctx;
+
+  SnapMap m_snap_map;
+
+  Mutex m_lock;
+  bool m_canceled = false;
+
+  image_sync::SnapshotCopyRequest<ImageCtxT> *m_snapshot_copy_request = nullptr;
+  image_sync::ImageCopyRequest<ImageCtxT> *m_image_copy_request = nullptr;
+  decltype(ImageCtxT::object_map) m_object_map = nullptr;
+
+  void send_notify_sync_request();
+  void handle_notify_sync_request(int r);
+
+  void send_prune_catch_up_sync_point();
+  void handle_prune_catch_up_sync_point(int r);
+
+  void send_create_sync_point();
+  void handle_create_sync_point(int r);
+
+  void send_copy_snapshots();
+  void handle_copy_snapshots(int r);
+
+  void send_copy_image();
+  void handle_copy_image(int r);
+
+  void send_copy_object_map();
+  void handle_copy_object_map(int r);
+
+  void send_refresh_object_map();
+  void handle_refresh_object_map(int r);
+
+  void send_prune_sync_points();
+  void handle_prune_sync_points(int r);
+
+  void update_progress(const std::string &description);
+};
+
+} // namespace mirror
+} // namespace rbd
+
+extern template class rbd::mirror::ImageSync<librbd::ImageCtx>;
+
+#endif // RBD_MIRROR_IMAGE_SYNC_H