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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_REFRESH_REQUEST_H
#define CEPH_LIBRBD_OBJECT_MAP_REFRESH_REQUEST_H
#include "include/int_types.h"
#include "include/buffer.h"
#include "common/bit_vector.hpp"
#include "common/ceph_mutex.h"
class Context;
class RWLock;
namespace librbd {
class ImageCtx;
namespace object_map {
template <typename ImageCtxT = ImageCtx>
class RefreshRequest {
public:
static RefreshRequest *create(ImageCtxT &image_ctx,
ceph::shared_mutex* object_map_lock,
ceph::BitVector<2> *object_map,
uint64_t snap_id, Context *on_finish) {
return new RefreshRequest(image_ctx, object_map_lock, object_map, snap_id,
on_finish);
}
RefreshRequest(ImageCtxT &image_ctx, ceph::shared_mutex* object_map_lock,
ceph::BitVector<2> *object_map, uint64_t snap_id,
Context *on_finish);
void send();
private:
/**
* @verbatim
*
* <start> -----> LOCK (skip if snapshot)
* * |
* * v (other errors)
* * LOAD * * * * * * * > INVALIDATE ------------\
* * | * |
* * | * (-EINVAL or too small) |
* * | * * * * * * > INVALIDATE_AND_RESIZE |
* * | | * |
* * | | * |
* * | v * |
* * | RESIZE * |
* * | | * |
* * | | * * * * * * * |
* * | | * |
* * | v v |
* * \--------------------> LOCK <-------------/
* * |
* v v
* INVALIDATE_AND_CLOSE ---------------> <finish>
*
* @endverbatim
*/
ImageCtxT &m_image_ctx;
ceph::shared_mutex* m_object_map_lock;
ceph::BitVector<2> *m_object_map;
uint64_t m_snap_id;
Context *m_on_finish;
uint64_t m_object_count;
ceph::BitVector<2> m_on_disk_object_map;
bool m_truncate_on_disk_object_map;
bufferlist m_out_bl;
void send_lock();
Context *handle_lock(int *ret_val);
void send_load();
Context *handle_load(int *ret_val);
void send_invalidate();
Context *handle_invalidate(int *ret_val);
void send_resize_invalidate();
Context *handle_resize_invalidate(int *ret_val);
void send_resize();
Context *handle_resize(int *ret_val);
void send_invalidate_and_close();
Context *handle_invalidate_and_close(int *ret_val);
void apply();
};
} // namespace object_map
} // namespace librbd
extern template class librbd::object_map::RefreshRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_OBJECT_MAP_REFRESH_REQUEST_H
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