ceph/src/librbd/operation/SparsifyRequest.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 #ifndef CEPH_LIBRBD_OPERATION_SPARSIFY_REQUEST_H
   4 #define CEPH_LIBRBD_OPERATION_SPARSIFY_REQUEST_H
   5
   6 #include "librbd/operation/Request.h"
   7 #include "common/snap_types.h"
   8
   9 namespace librbd {
  10
  11 class ImageCtx;
  12 class ProgressContext;
  13
  14 namespace operation {
  15
  16 template <typename ImageCtxT = ImageCtx>
  17 class SparsifyRequest : public Request<ImageCtxT>
  18 {
  19 public:
  20   SparsifyRequest(ImageCtxT &image_ctx, size_t sparse_size, Context *on_finish,
  21                   ProgressContext &prog_ctx)
  22     : Request<ImageCtxT>(image_ctx, on_finish), m_sparse_size(sparse_size),
  23       m_prog_ctx(prog_ctx) {
  24   }
  25
  26 protected:
  27   void send_op() override;
  28   bool should_complete(int r) override;
  29   bool can_affect_io() const override {
  30     return true;
  31   }
  32   journal::Event create_event(uint64_t op_tid) const override {
  33     ceph_abort();
  34     return journal::UnknownEvent();
  35   }
  36
  37 private:
  38   /**
  39    * @verbatim
  40    *
  41    * <start>
  42    *    |
  43    *    v
  44    * SPARSIFY OBJECTS
  45    *    |
  46    *    v
  47    * <finish>
  48    *
  49    * @endverbatim
  50    */
  51
  52   size_t m_sparse_size;
  53   ProgressContext &m_prog_ctx;
  54
  55   void sparsify_objects();
  56   void handle_sparsify_objects(int r);
  57 };
  58
  59 } // namespace operation
  60 } // namespace librbd
  61
  62 extern template class librbd::operation::SparsifyRequest<librbd::ImageCtx>;
  63
  64 #endif // CEPH_LIBRBD_OPERATION_SPARSIFY_REQUEST_H