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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_MANAGED_LOCK_ACQUIRE_REQUEST_H
#define CEPH_LIBRBD_MANAGED_LOCK_ACQUIRE_REQUEST_H
#include "include/rados/librados.hpp"
#include "include/int_types.h"
#include "include/buffer.h"
#include "msg/msg_types.h"
#include "librbd/managed_lock/Types.h"
#include "librbd/watcher/Types.h"
#include <string>
class Context;
namespace librbd {
class AsioEngine;
class Watcher;
namespace managed_lock {
template <typename ImageCtxT>
class AcquireRequest {
private:
typedef watcher::Traits<ImageCtxT> TypeTraits;
typedef typename TypeTraits::Watcher Watcher;
public:
static AcquireRequest* create(librados::IoCtx& ioctx, Watcher *watcher,
AsioEngine& asio_engine,
const std::string& oid,
const std::string& cookie,
bool exclusive,
bool blocklist_on_break_lock,
uint32_t blocklist_expire_seconds,
Context *on_finish);
~AcquireRequest();
void send();
private:
/**
* @verbatim
*
* <start>
* |
* v
* GET_LOCKER
* | ^
* | . (EBUSY && no cached locker)
* | .
* | . (EBUSY && cached locker)
* \--> LOCK_IMAGE * * * * * * * * > BREAK_LOCK . . . . .
* | ^ | .
* | | | (success) .
* | \-------------------------/ .
* v .
* <finish> < . . . . . . . . . . . . . . . . . . .
*
* @endverbatim
*/
AcquireRequest(librados::IoCtx& ioctx, Watcher *watcher,
AsioEngine& asio_engine, const std::string& oid,
const std::string& cookie, bool exclusive,
bool blocklist_on_break_lock,
uint32_t blocklist_expire_seconds, Context *on_finish);
librados::IoCtx& m_ioctx;
Watcher *m_watcher;
CephContext *m_cct;
AsioEngine& m_asio_engine;
std::string m_oid;
std::string m_cookie;
bool m_exclusive;
bool m_blocklist_on_break_lock;
uint32_t m_blocklist_expire_seconds;
Context *m_on_finish;
bufferlist m_out_bl;
Locker m_locker;
void send_get_locker();
void handle_get_locker(int r);
void send_lock();
void handle_lock(int r);
void send_break_lock();
void handle_break_lock(int r);
void finish(int r);
};
} // namespace managed_lock
} // namespace librbd
#endif // CEPH_LIBRBD_MANAGED_LOCK_ACQUIRE_REQUEST_H
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