initial code repo

[stor4nfv.git] / src / ceph / src / tools / rbd_mirror / image_sync / SyncPointCreateRequest.h

diff --git a/src/ceph/src/tools/rbd_mirror/image_sync/SyncPointCreateRequest.h b/src/ceph/src/tools/rbd_mirror/image_sync/SyncPointCreateRequest.h
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+++ b/src/ceph/src/tools/rbd_mirror/image_sync/SyncPointCreateRequest.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_SYNC_POINT_CREATE_REQUEST_H
+#define RBD_MIRROR_IMAGE_SYNC_SYNC_POINT_CREATE_REQUEST_H
+
+#include "librbd/journal/Types.h"
+#include "librbd/journal/TypeTraits.h"
+#include <string>
+
+class Context;
+namespace journal { class Journaler; }
+namespace librbd { class ImageCtx; }
+namespace librbd { namespace journal { struct MirrorPeerClientMeta; } }
+
+namespace rbd {
+namespace mirror {
+namespace image_sync {
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class SyncPointCreateRequest {
+public:
+  typedef librbd::journal::TypeTraits<ImageCtxT> TypeTraits;
+  typedef typename TypeTraits::Journaler Journaler;
+  typedef librbd::journal::MirrorPeerClientMeta MirrorPeerClientMeta;
+  typedef librbd::journal::MirrorPeerSyncPoint MirrorPeerSyncPoint;
+
+  static SyncPointCreateRequest* create(ImageCtxT *remote_image_ctx,
+                                        const std::string &mirror_uuid,
+                                        Journaler *journaler,
+                                        MirrorPeerClientMeta *client_meta,
+                                        Context *on_finish) {
+    return new SyncPointCreateRequest(remote_image_ctx, mirror_uuid, journaler,
+                                      client_meta, on_finish);
+  }
+
+  SyncPointCreateRequest(ImageCtxT *remote_image_ctx,
+                         const std::string &mirror_uuid, Journaler *journaler,
+                         MirrorPeerClientMeta *client_meta, Context *on_finish);
+
+  void send();
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * UPDATE_CLIENT < . .
+   *    |              .
+   *    v              .
+   * REFRESH_IMAGE     .
+   *    |              . (repeat on EEXIST)
+   *    v              .
+   * CREATE_SNAP . . . .
+   *    |
+   *    v
+   * REFRESH_IMAGE
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   */
+
+  ImageCtxT *m_remote_image_ctx;
+  std::string m_mirror_uuid;
+  Journaler *m_journaler;
+  MirrorPeerClientMeta *m_client_meta;
+  Context *m_on_finish;
+
+  MirrorPeerClientMeta m_client_meta_copy;
+
+  void send_update_client();
+  void handle_update_client(int r);
+
+  void send_refresh_image();
+  void handle_refresh_image(int r);
+
+  void send_create_snap();
+  void handle_create_snap(int r);
+
+  void send_final_refresh_image();
+  void handle_final_refresh_image(int r);
+
+  void finish(int r);
+};
+
+} // namespace image_sync
+} // namespace mirror
+} // namespace rbd
+
+extern template class rbd::mirror::image_sync::SyncPointCreateRequest<librbd::ImageCtx>;
+
+#endif // RBD_MIRROR_IMAGE_SYNC_SYNC_POINT_CREATE_REQUEST_H