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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_LOCK_REQUEST_H
#define CEPH_LIBRBD_OBJECT_MAP_LOCK_REQUEST_H
#include "include/buffer.h"
#include "cls/lock/cls_lock_types.h"
#include <map>
class Context;
namespace librbd {
class ImageCtx;
namespace object_map {
template <typename ImageCtxT = ImageCtx>
class LockRequest {
public:
static LockRequest* create(ImageCtxT &image_ctx, Context *on_finish) {
return new LockRequest(image_ctx, on_finish);
}
LockRequest(ImageCtxT &image_ctx, Context *on_finish);
void send();
private:
/**
* @verbatim
*
* <start> /------------------------------------- BREAK_LOCKS * * *
* | | ^ *
* | | | *
* | | | *
* | v (EBUSY && !broke_lock) | *
* \---------> LOCK_OBJECT_MAP * * * * * * * * * * * > GET_LOCK_INFO * *
* | * ^ * *
* | * * * *
* | * * (ENOENT) * *
* | * * * * * * * * * * * * * * * * * *
* | * *
* | * (other errors) *
* | * *
* v v (other errors) *
* <finish> < * * * * * * * * * * * * * * * * * * * * * * * *
*
* @endverbatim
*/
ImageCtxT &m_image_ctx;
Context *m_on_finish;
bool m_broke_lock;
std::map<rados::cls::lock::locker_id_t,
rados::cls::lock::locker_info_t> m_lockers;
bufferlist m_out_bl;
void send_lock();
Context *handle_lock(int *ret_val);
void send_get_lock_info();
Context *handle_get_lock_info(int *ret_val);
void send_break_locks();
Context *handle_break_locks(int *ret_val);
};
} // namespace object_map
} // namespace librbd
extern template class librbd::object_map::LockRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_OBJECT_MAP_LOCK_REQUEST_H
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