src/ceph/src/librbd/mirror/GetStatusRequest.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_LIBRBD_MIRROR_GET_STATUS_REQUEST_H
   5 #define CEPH_LIBRBD_MIRROR_GET_STATUS_REQUEST_H
   6
   7 #include "include/buffer.h"
   8 #include "librbd/mirror/Types.h"
   9 #include <string>
  10
  11 struct Context;
  12 namespace cls { namespace rbd { struct MirrorImage; } }
  13 namespace cls { namespace rbd { struct MirrorImageStatus; } }
  14
  15 namespace librbd {
  16
  17 struct ImageCtx;
  18
  19 namespace mirror {
  20
  21 template <typename ImageCtxT = librbd::ImageCtx>
  22 class GetStatusRequest {
  23 public:
  24   static GetStatusRequest *create(ImageCtxT &image_ctx,
  25                                   cls::rbd::MirrorImageStatus *status,
  26                                   cls::rbd::MirrorImage *mirror_image,
  27                                   PromotionState *promotion_state,
  28                                   Context *on_finish) {
  29     return new GetStatusRequest(image_ctx, status, mirror_image,
  30                                 promotion_state, on_finish);
  31   }
  32
  33   GetStatusRequest(ImageCtxT &image_ctx, cls::rbd::MirrorImageStatus *status,
  34                    cls::rbd::MirrorImage *mirror_image,
  35                    PromotionState *promotion_state, Context *on_finish)
  36     : m_image_ctx(image_ctx), m_mirror_image_status(status),
  37       m_mirror_image(mirror_image), m_promotion_state(promotion_state),
  38       m_on_finish(on_finish) {
  39   }
  40
  41   void send();
  42
  43 private:
  44   /**
  45    * @verbatim
  46    *
  47    * <start>
  48    *    |
  49    *    v
  50    * GET_INFO
  51    *    |
  52    *    v
  53    * GET_STATUS
  54    *    |
  55    *    v
  56    * <finish>
  57    *
  58    * @endverbatim
  59    */
  60
  61   ImageCtxT &m_image_ctx;
  62   cls::rbd::MirrorImageStatus *m_mirror_image_status;
  63   cls::rbd::MirrorImage *m_mirror_image;
  64   PromotionState *m_promotion_state;
  65   Context *m_on_finish;
  66
  67   bufferlist m_out_bl;
  68
  69   void get_info();
  70   void handle_get_info(int r);
  71
  72   void get_status();
  73   void handle_get_status(int r);
  74
  75   void finish(int r);
  76
  77 };
  78
  79 } // namespace mirror
  80 } // namespace librbd
  81
  82 extern template class librbd::mirror::GetStatusRequest<librbd::ImageCtx>;
  83
  84 #endif // CEPH_LIBRBD_MIRROR_GET_STATUS_REQUEST_H
  85