ceph/src/tools/rbd_mirror/image_replayer/OpenImageRequest.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_OPEN_IMAGE_REQUEST_H
   5 #define RBD_MIRROR_IMAGE_REPLAYER_OPEN_IMAGE_REQUEST_H
   6
   7 #include "include/int_types.h"
   8 #include "librbd/ImageCtx.h"
   9 #include <string>
  10
  11 class Context;
  12 namespace librbd { class ImageCtx; }
  13
  14 namespace rbd {
  15 namespace mirror {
  16 namespace image_replayer {
  17
  18 template <typename ImageCtxT = librbd::ImageCtx>
  19 class OpenImageRequest {
  20 public:
  21   static OpenImageRequest* create(librados::IoCtx &io_ctx,
  22                                   ImageCtxT **image_ctx,
  23                                   const std::string &image_id,
  24                                   bool read_only, Context *on_finish) {
  25     return new OpenImageRequest(io_ctx, image_ctx, image_id, read_only,
  26                                 on_finish);
  27   }
  28
  29   OpenImageRequest(librados::IoCtx &io_ctx, ImageCtxT **image_ctx,
  30                    const std::string &image_id, bool read_only,
  31                    Context *on_finish);
  32
  33   void send();
  34
  35 private:
  36   /**
  37    * @verbatim
  38    *
  39    * <start>
  40    *    |
  41    *    v
  42    * OPEN_IMAGE
  43    *    |
  44    *    v
  45    * <finish>
  46    *
  47    * @endverbatim
  48    */
  49   librados::IoCtx &m_io_ctx;
  50   ImageCtxT **m_image_ctx;
  51   std::string m_image_id;
  52   bool m_read_only;
  53   Context *m_on_finish;
  54
  55   void send_open_image();
  56   void handle_open_image(int r);
  57
  58   void send_close_image(int r);
  59   void handle_close_image(int r);
  60
  61   void finish(int r);
  62
  63 };
  64
  65 } // namespace image_replayer
  66 } // namespace mirror
  67 } // namespace rbd
  68
  69 extern template class rbd::mirror::image_replayer::OpenImageRequest<librbd::ImageCtx>;
  70
  71 #endif // RBD_MIRROR_IMAGE_REPLAYER_OPEN_IMAGE_REQUEST_H