ceph/src/tools/rbd_mirror/image_map/LoadRequest.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 CEPH_RBD_MIRROR_IMAGE_MAP_LOAD_REQUEST_H
   5 #define CEPH_RBD_MIRROR_IMAGE_MAP_LOAD_REQUEST_H
   6
   7 #include "cls/rbd/cls_rbd_types.h"
   8 #include "include/rados/librados.hpp"
   9
  10 class Context;
  11
  12 namespace librbd { class ImageCtx; }
  13
  14 namespace rbd {
  15 namespace mirror {
  16 namespace image_map {
  17
  18 template<typename ImageCtxT = librbd::ImageCtx>
  19 class LoadRequest {
  20 public:
  21   static LoadRequest *create(librados::IoCtx &ioctx,
  22                              std::map<std::string, cls::rbd::MirrorImageMap> *image_mapping,
  23                              Context *on_finish) {
  24     return new LoadRequest(ioctx, image_mapping, on_finish);
  25   }
  26
  27   void send();
  28
  29 private:
  30   /**
  31    * @verbatim
  32    *
  33    *     <start>
  34    *        |     . . . . . . . .
  35    *        v     v             . MAX_RETURN
  36    *  IMAGE_MAP_LIST. . . . . . .
  37    *        |
  38    *        v
  39    *    <finish>
  40    *
  41    * @endverbatim
  42    */
  43   LoadRequest(librados::IoCtx &ioctx,
  44               std::map<std::string, cls::rbd::MirrorImageMap> *image_mapping,
  45               Context *on_finish);
  46
  47   librados::IoCtx &m_ioctx;
  48   std::map<std::string, cls::rbd::MirrorImageMap> *m_image_mapping;
  49   Context *m_on_finish;
  50
  51   bufferlist m_out_bl;
  52   std::string m_start_after;
  53
  54   void image_map_list();
  55   void handle_image_map_list(int r);
  56
  57   void finish(int r);
  58 };
  59
  60 } // namespace image_map
  61 } // namespace mirror
  62 } // namespace rbd
  63
  64 #endif // CEPH_RBD_MIRROR_IMAGE_MAP_LOAD_REQUEST_H