ceph/src/tools/rbd_mirror/image_replayer/GetMirrorImageIdRequest.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef RBD_MIRROR_IMAGE_REPLAYER_GET_MIRROR_IMAGE_ID_REQUEST_H
   5 #define RBD_MIRROR_IMAGE_REPLAYER_GET_MIRROR_IMAGE_ID_REQUEST_H
   6
   7 #include "include/buffer.h"
   8 #include <string>
   9
  10 namespace librados { struct IoCtx; }
  11 namespace librbd { struct ImageCtx; }
  12
  13 struct Context;
  14
  15 namespace rbd {
  16 namespace mirror {
  17 namespace image_replayer {
  18
  19 template <typename ImageCtxT = librbd::ImageCtx>
  20 class GetMirrorImageIdRequest {
  21 public:
  22   static GetMirrorImageIdRequest *create(librados::IoCtx &io_ctx,
  23                                          const std::string &global_image_id,
  24                                          std::string *image_id,
  25                                          Context *on_finish) {
  26     return new GetMirrorImageIdRequest(io_ctx, global_image_id, image_id,
  27                                        on_finish);
  28   }
  29
  30   GetMirrorImageIdRequest(librados::IoCtx &io_ctx,
  31                            const std::string &global_image_id,
  32                            std::string *image_id,
  33                            Context *on_finish)
  34     : m_io_ctx(io_ctx), m_global_image_id(global_image_id),
  35       m_image_id(image_id), m_on_finish(on_finish) {
  36   }
  37
  38   void send();
  39
  40 private:
  41   /**
  42    * @verbatim
  43    *
  44    * <start>
  45    *    |
  46    *    v
  47    * GET_IMAGE_ID
  48    *    |
  49    *    v
  50    * <finish>
  51
  52    * @endverbatim
  53    */
  54
  55   librados::IoCtx &m_io_ctx;
  56   std::string m_global_image_id;
  57   std::string *m_image_id;
  58   Context *m_on_finish;
  59
  60   bufferlist m_out_bl;
  61
  62   void get_image_id();
  63   void handle_get_image_id(int r);
  64
  65   void finish(int r);
  66
  67 };
  68
  69 } // namespace image_replayer
  70 } // namespace mirror
  71 } // namespace rbd
  72
  73 extern template class rbd::mirror::image_replayer::GetMirrorImageIdRequest<librbd::ImageCtx>;
  74
  75 #endif // RBD_MIRROR_IMAGE_REPLAYER_GET_MIRROR_IMAGE_ID_REQUEST_H