ceph/src/librbd/io/ObjectDispatch.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_IO_OBJECT_DISPATCH_H
   5 #define CEPH_LIBRBD_IO_OBJECT_DISPATCH_H
   6
   7 #include "include/int_types.h"
   8 #include "include/buffer.h"
   9 #include "include/rados/librados.hpp"
  10 #include "common/snap_types.h"
  11 #include "common/zipkin_trace.h"
  12 #include "librbd/io/Types.h"
  13 #include "librbd/io/ObjectDispatchInterface.h"
  14
  15 struct Context;
  16
  17 namespace librbd {
  18
  19 struct ImageCtx;
  20
  21 namespace io {
  22
  23 struct AioCompletion;
  24
  25 template <typename ImageCtxT = librbd::ImageCtx>
  26 class ObjectDispatch : public ObjectDispatchInterface {
  27 public:
  28   ObjectDispatch(ImageCtxT* image_ctx);
  29
  30   ObjectDispatchLayer get_object_dispatch_layer() const override {
  31     return OBJECT_DISPATCH_LAYER_CORE;
  32   }
  33
  34   void shut_down(Context* on_finish) override;
  35
  36   bool read(
  37       const std::string &oid, uint64_t object_no, uint64_t object_off,
  38       uint64_t object_len, librados::snap_t snap_id, int op_flags,
  39       const ZTracer::Trace &parent_trace, ceph::bufferlist* read_data,
  40       ExtentMap* extent_map, int* object_dispatch_flags,
  41       DispatchResult* dispatch_result, Context** on_finish,
  42       Context* on_dispatched) override;
  43
  44   bool discard(
  45       const std::string &oid, uint64_t object_no, uint64_t object_off,
  46       uint64_t object_len, const ::SnapContext &snapc, int discard_flags,
  47       const ZTracer::Trace &parent_trace, int* object_dispatch_flags,
  48       uint64_t* journal_tid, DispatchResult* dispatch_result,
  49       Context** on_finish, Context* on_dispatched) override;
  50
  51   bool write(
  52       const std::string &oid, uint64_t object_no, uint64_t object_off,
  53       ceph::bufferlist&& data, const ::SnapContext &snapc, int op_flags,
  54       const ZTracer::Trace &parent_trace, int* object_dispatch_flags,
  55       uint64_t* journal_tid, DispatchResult* dispatch_result,
  56       Context** on_finish, Context* on_dispatched) override;
  57
  58   bool write_same(
  59       const std::string &oid, uint64_t object_no, uint64_t object_off,
  60       uint64_t object_len, Extents&& buffer_extents, ceph::bufferlist&& data,
  61       const ::SnapContext &snapc, int op_flags,
  62       const ZTracer::Trace &parent_trace, int* object_dispatch_flags,
  63       uint64_t* journal_tid, DispatchResult* dispatch_result,
  64       Context** on_finish, Context* on_dispatched) override;
  65
  66   bool compare_and_write(
  67       const std::string &oid, uint64_t object_no, uint64_t object_off,
  68       ceph::bufferlist&& cmp_data, ceph::bufferlist&& write_data,
  69       const ::SnapContext &snapc, int op_flags,
  70       const ZTracer::Trace &parent_trace, uint64_t* mismatch_offset,
  71       int* object_dispatch_flags, uint64_t* journal_tid,
  72       DispatchResult* dispatch_result, Context** on_finish,
  73       Context* on_dispatched) override;
  74
  75   bool flush(
  76       FlushSource flush_source, const ZTracer::Trace &parent_trace,
  77       DispatchResult* dispatch_result, Context** on_finish,
  78       Context* on_dispatched) override {
  79     return false;
  80   }
  81
  82   bool invalidate_cache(Context* on_finish) override {
  83     return false;
  84   }
  85   bool reset_existence_cache(Context* on_finish) override {
  86     return false;
  87   }
  88
  89   void extent_overwritten(
  90       uint64_t object_no, uint64_t object_off, uint64_t object_len,
  91       uint64_t journal_tid, uint64_t new_journal_tid) override {
  92   }
  93
  94 private:
  95   ImageCtxT* m_image_ctx;
  96
  97 };
  98
  99 } // namespace io
 100 } // namespace librbd
 101
 102 extern template class librbd::io::ObjectDispatch<librbd::ImageCtx>;
 103
 104 #endif // CEPH_LIBRBD_IO_OBJECT_DISPATCH_H