ceph/src/librbd/mirror/EnableRequest.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_ENABLE_REQUEST_H
   5 #define CEPH_LIBRBD_MIRROR_ENABLE_REQUEST_H
   6
   7 #include "include/buffer.h"
   8 #include "cls/rbd/cls_rbd_types.h"
   9 #include <map>
  10 #include <string>
  11
  12 class Context;
  13 class ContextWQ;
  14
  15 namespace librados { class IoCtx; }
  16
  17 namespace librbd {
  18
  19 class ImageCtx;
  20
  21 namespace mirror {
  22
  23 template <typename ImageCtxT = ImageCtx>
  24 class EnableRequest {
  25 public:
  26   static EnableRequest *create(ImageCtxT *image_ctx, Context *on_finish) {
  27     return create(image_ctx->md_ctx, image_ctx->id, "",
  28                   image_ctx->op_work_queue, on_finish);
  29   }
  30   static EnableRequest *create(librados::IoCtx &io_ctx,
  31                                const std::string &image_id,
  32                                const std::string &non_primary_global_image_id,
  33                                ContextWQ *op_work_queue, Context *on_finish) {
  34     return new EnableRequest(io_ctx, image_id, non_primary_global_image_id,
  35                              op_work_queue, on_finish);
  36   }
  37
  38   void send();
  39
  40 private:
  41   /**
  42    * @verbatim
  43    *
  44    * <start>
  45    *    |
  46    *    v
  47    * GET_MIRROR_MODE  * * * * * * *
  48    *    |                         *
  49    *    v                         *
  50    * GET_TAG_OWNER  * * * * * * * *
  51    *    |                         *
  52    *    v                         *
  53    * GET_MIRROR_IMAGE * * * * * * *
  54    *    |                         * (on error)
  55    *    v                         *
  56    * SET_MIRROR_IMAGE * * * * * * *
  57    *    |                         *
  58    *    v                         *
  59    * NOTIFY_MIRRORING_WATCHER * * *
  60    *    |                         *
  61    *    v                         *
  62    * <finish>   < * * * * * * * * *
  63    *
  64    * @endverbatim
  65    */
  66
  67   EnableRequest(librados::IoCtx &io_ctx, const std::string &image_id,
  68                 const std::string &non_primary_global_image_id,
  69                 ContextWQ *op_work_queue, Context *on_finish);
  70
  71   librados::IoCtx &m_io_ctx;
  72   std::string m_image_id;
  73   std::string m_non_primary_global_image_id;
  74   ContextWQ *m_op_work_queue;
  75   Context *m_on_finish;
  76
  77   CephContext *m_cct = nullptr;
  78   bool m_is_primary = false;
  79   bufferlist m_out_bl;
  80   cls::rbd::MirrorImage m_mirror_image;
  81
  82   void send_get_tag_owner();
  83   Context *handle_get_tag_owner(int *result);
  84
  85   void send_get_mirror_image();
  86   Context *handle_get_mirror_image(int *result);
  87
  88   void send_set_mirror_image();
  89   Context *handle_set_mirror_image(int *result);
  90
  91   void send_notify_mirroring_watcher();
  92   Context *handle_notify_mirroring_watcher(int *result);
  93 };
  94
  95 } // namespace mirror
  96 } // namespace librbd
  97
  98 extern template class librbd::mirror::EnableRequest<librbd::ImageCtx>;
  99
 100 #endif // CEPH_LIBRBD_MIRROR_ENABLE_REQUEST_H