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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_OBJECT_MAP_DIFF_REQUEST_H
#define CEPH_LIBRBD_OBJECT_MAP_DIFF_REQUEST_H
#include "include/int_types.h"
#include "common/bit_vector.hpp"
#include "common/ceph_mutex.h"
#include "librbd/object_map/Types.h"
#include <set>
struct Context;
namespace librbd {
struct ImageCtx;
namespace object_map {
template <typename ImageCtxT>
class DiffRequest {
public:
static DiffRequest* create(ImageCtxT* image_ctx, uint64_t snap_id_start,
uint64_t snap_id_end,
BitVector<2>* object_diff_state,
Context* on_finish) {
return new DiffRequest(image_ctx, snap_id_start, snap_id_end,
object_diff_state, on_finish);
}
DiffRequest(ImageCtxT* image_ctx, uint64_t snap_id_start,
uint64_t snap_id_end, BitVector<2>* object_diff_state,
Context* on_finish)
: m_image_ctx(image_ctx), m_snap_id_start(snap_id_start),
m_snap_id_end(snap_id_end), m_object_diff_state(object_diff_state),
m_on_finish(on_finish) {
}
void send();
private:
/**
* @verbatim
*
* <start>
* |
* | /---------\
* | | |
* v v |
* LOAD_OBJECT_MAP ---/
* |
* v
* <finish>
*
* @endverbatim
*/
ImageCtxT* m_image_ctx;
uint64_t m_snap_id_start;
uint64_t m_snap_id_end;
BitVector<2>* m_object_diff_state;
Context* m_on_finish;
std::set<uint64_t> m_snap_ids;
uint64_t m_current_snap_id = 0;
bool m_ignore_enoent = false;
uint64_t m_current_size = 0;
BitVector<2> m_object_map;
bool m_object_diff_state_valid = false;
bufferlist m_out_bl;
void load_object_map(std::shared_lock<ceph::shared_mutex>* image_locker);
void handle_load_object_map(int r);
void finish(int r);
};
} // namespace object_map
} // namespace librbd
extern template class librbd::object_map::DiffRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_OBJECT_MAP_DIFF_REQUEST_H
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