src/ceph/src/tools/rbd_mirror/image_sync/SnapshotCreateRequest.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_SYNC_SNAPSHOT_CREATE_REQUEST_H
   5 #define RBD_MIRROR_IMAGE_SYNC_SNAPSHOT_CREATE_REQUEST_H
   6
   7 #include "include/int_types.h"
   8 #include "include/rados/librados.hpp"
   9 #include "common/snap_types.h"
  10 #include "librbd/ImageCtx.h"
  11 #include "librbd/Types.h"
  12 #include "librbd/journal/TypeTraits.h"
  13 #include <map>
  14 #include <set>
  15 #include <string>
  16 #include <tuple>
  17
  18 class Context;
  19
  20 namespace rbd {
  21 namespace mirror {
  22 namespace image_sync {
  23
  24 template <typename ImageCtxT = librbd::ImageCtx>
  25 class SnapshotCreateRequest {
  26 public:
  27   static SnapshotCreateRequest* create(ImageCtxT *local_image_ctx,
  28                                        const std::string &snap_name,
  29                                        const cls::rbd::SnapshotNamespace &snap_namespace,
  30                                        uint64_t size,
  31                                        const librbd::ParentSpec &parent_spec,
  32                                        uint64_t parent_overlap,
  33                                        Context *on_finish) {
  34     return new SnapshotCreateRequest(local_image_ctx, snap_name, snap_namespace, size,
  35                                      parent_spec, parent_overlap, on_finish);
  36   }
  37
  38   SnapshotCreateRequest(ImageCtxT *local_image_ctx,
  39                         const std::string &snap_name,
  40                         const cls::rbd::SnapshotNamespace &snap_namespace,
  41                         uint64_t size,
  42                         const librbd::ParentSpec &parent_spec,
  43                         uint64_t parent_overlap, Context *on_finish);
  44
  45   void send();
  46
  47 private:
  48   /**
  49    * @verbatim
  50    *
  51    * <start>
  52    *    |
  53    *    v (skip if not needed)
  54    * SET_SIZE
  55    *    |
  56    *    v (skip if not needed)
  57    * REMOVE_PARENT
  58    *    |
  59    *    v (skip if not needed)
  60    * SET_PARENT
  61    *    |
  62    *    v
  63    * CREATE_SNAP
  64    *    |
  65    *    v (skip if not needed)
  66    * CREATE_OBJECT_MAP
  67    *    |
  68    *    v
  69    * <finish>
  70    *
  71    * @endverbatim
  72    */
  73
  74   ImageCtxT *m_local_image_ctx;
  75   std::string m_snap_name;
  76   cls::rbd::SnapshotNamespace m_snap_namespace;
  77   uint64_t m_size;
  78   librbd::ParentSpec m_parent_spec;
  79   uint64_t m_parent_overlap;
  80   Context *m_on_finish;
  81
  82   void send_set_size();
  83   void handle_set_size(int r);
  84
  85   void send_remove_parent();
  86   void handle_remove_parent(int r);
  87
  88   void send_set_parent();
  89   void handle_set_parent(int r);
  90
  91   void send_snap_create();
  92   void handle_snap_create(int r);
  93
  94   void send_create_object_map();
  95   void handle_create_object_map(int r);
  96
  97   Context *start_local_op();
  98
  99   void finish(int r);
 100 };
 101
 102 } // namespace image_sync
 103 } // namespace mirror
 104 } // namespace rbd
 105
 106 extern template class rbd::mirror::image_sync::SnapshotCreateRequest<librbd::ImageCtx>;
 107
 108 #endif // RBD_MIRROR_IMAGE_SYNC_SNAPSHOT_CREATE_REQUEST_H