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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "include/types.h"
#include "msg/msg_types.h"
#include "include/rados/librados.hpp"
#include "include/utime.h"
#include "cls/lock/cls_lock_ops.h"
#include "cls/lock/cls_lock_client.h"
using std::map;
using namespace librados;
namespace rados {
namespace cls {
namespace lock {
void lock(ObjectWriteOperation *rados_op,
const std::string& name, ClsLockType type,
const std::string& cookie, const std::string& tag,
const std::string& description,
const utime_t& duration, uint8_t flags)
{
cls_lock_lock_op op;
op.name = name;
op.type = type;
op.cookie = cookie;
op.tag = tag;
op.description = description;
op.duration = duration;
op.flags = flags;
bufferlist in;
encode(op, in);
rados_op->exec("lock", "lock", in);
}
int lock(IoCtx *ioctx,
const std::string& oid,
const std::string& name, ClsLockType type,
const std::string& cookie, const std::string& tag,
const std::string& description, const utime_t& duration,
uint8_t flags)
{
ObjectWriteOperation op;
lock(&op, name, type, cookie, tag, description, duration, flags);
return ioctx->operate(oid, &op);
}
void unlock(ObjectWriteOperation *rados_op,
const std::string& name, const std::string& cookie)
{
cls_lock_unlock_op op;
op.name = name;
op.cookie = cookie;
bufferlist in;
encode(op, in);
rados_op->exec("lock", "unlock", in);
}
int unlock(IoCtx *ioctx, const std::string& oid,
const std::string& name, const std::string& cookie)
{
ObjectWriteOperation op;
unlock(&op, name, cookie);
return ioctx->operate(oid, &op);
}
int aio_unlock(IoCtx *ioctx, const std::string& oid,
const std::string& name, const std::string& cookie,
librados::AioCompletion *completion)
{
ObjectWriteOperation op;
unlock(&op, name, cookie);
return ioctx->aio_operate(oid, completion, &op);
}
void break_lock(ObjectWriteOperation *rados_op,
const std::string& name, const std::string& cookie,
const entity_name_t& locker)
{
cls_lock_break_op op;
op.name = name;
op.cookie = cookie;
op.locker = locker;
bufferlist in;
encode(op, in);
rados_op->exec("lock", "break_lock", in);
}
int break_lock(IoCtx *ioctx, const std::string& oid,
const std::string& name, const std::string& cookie,
const entity_name_t& locker)
{
ObjectWriteOperation op;
break_lock(&op, name, cookie, locker);
return ioctx->operate(oid, &op);
}
int list_locks(IoCtx *ioctx, const std::string& oid, std::list<std::string> *locks)
{
bufferlist in, out;
int r = ioctx->exec(oid, "lock", "list_locks", in, out);
if (r < 0)
return r;
cls_lock_list_locks_reply ret;
auto iter = std::cbegin(out);
try {
decode(ret, iter);
} catch (ceph::buffer::error& err) {
return -EBADMSG;
}
*locks = ret.locks;
return 0;
}
void get_lock_info_start(ObjectReadOperation *rados_op,
const std::string& name)
{
bufferlist in;
cls_lock_get_info_op op;
op.name = name;
encode(op, in);
rados_op->exec("lock", "get_info", in);
}
int get_lock_info_finish(bufferlist::const_iterator *iter,
map<locker_id_t, locker_info_t> *lockers,
ClsLockType *type, std::string *tag)
{
cls_lock_get_info_reply ret;
try {
decode(ret, *iter);
} catch (ceph::buffer::error& err) {
return -EBADMSG;
}
if (lockers) {
*lockers = ret.lockers;
}
if (type) {
*type = ret.lock_type;
}
if (tag) {
*tag = ret.tag;
}
return 0;
}
int get_lock_info(IoCtx *ioctx, const std::string& oid, const std::string& name,
map<locker_id_t, locker_info_t> *lockers,
ClsLockType *type, std::string *tag)
{
ObjectReadOperation op;
get_lock_info_start(&op, name);
bufferlist out;
int r = ioctx->operate(oid, &op, &out);
if (r < 0)
return r;
auto it = std::cbegin(out);
return get_lock_info_finish(&it, lockers, type, tag);
}
void assert_locked(librados::ObjectOperation *rados_op,
const std::string& name, ClsLockType type,
const std::string& cookie, const std::string& tag)
{
cls_lock_assert_op op;
op.name = name;
op.type = type;
op.cookie = cookie;
op.tag = tag;
bufferlist in;
encode(op, in);
rados_op->exec("lock", "assert_locked", in);
}
void set_cookie(librados::ObjectWriteOperation *rados_op,
const std::string& name, ClsLockType type,
const std::string& cookie, const std::string& tag,
const std::string& new_cookie)
{
cls_lock_set_cookie_op op;
op.name = name;
op.type = type;
op.cookie = cookie;
op.tag = tag;
op.new_cookie = new_cookie;
bufferlist in;
encode(op, in);
rados_op->exec("lock", "set_cookie", in);
}
void Lock::assert_locked_shared(ObjectOperation *op)
{
assert_locked(op, name, ClsLockType::SHARED, cookie, tag);
}
void Lock::assert_locked_exclusive(ObjectOperation *op)
{
assert_locked(op, name, ClsLockType::EXCLUSIVE, cookie, tag);
}
void Lock::assert_locked_exclusive_ephemeral(ObjectOperation *op)
{
assert_locked(op, name, ClsLockType::EXCLUSIVE_EPHEMERAL, cookie, tag);
}
void Lock::lock_shared(ObjectWriteOperation *op)
{
lock(op, name, ClsLockType::SHARED,
cookie, tag, description, duration, flags);
}
int Lock::lock_shared(IoCtx *ioctx, const std::string& oid)
{
return lock(ioctx, oid, name, ClsLockType::SHARED,
cookie, tag, description, duration, flags);
}
void Lock::lock_exclusive(ObjectWriteOperation *op)
{
lock(op, name, ClsLockType::EXCLUSIVE,
cookie, tag, description, duration, flags);
}
int Lock::lock_exclusive(IoCtx *ioctx, const std::string& oid)
{
return lock(ioctx, oid, name, ClsLockType::EXCLUSIVE,
cookie, tag, description, duration, flags);
}
void Lock::lock_exclusive_ephemeral(ObjectWriteOperation *op)
{
lock(op, name, ClsLockType::EXCLUSIVE_EPHEMERAL,
cookie, tag, description, duration, flags);
}
int Lock::lock_exclusive_ephemeral(IoCtx *ioctx, const std::string& oid)
{
return lock(ioctx, oid, name, ClsLockType::EXCLUSIVE_EPHEMERAL,
cookie, tag, description, duration, flags);
}
void Lock::unlock(ObjectWriteOperation *op)
{
rados::cls::lock::unlock(op, name, cookie);
}
int Lock::unlock(IoCtx *ioctx, const std::string& oid)
{
return rados::cls::lock::unlock(ioctx, oid, name, cookie);
}
void Lock::break_lock(ObjectWriteOperation *op, const entity_name_t& locker)
{
rados::cls::lock::break_lock(op, name, cookie, locker);
}
int Lock::break_lock(IoCtx *ioctx, const std::string& oid, const entity_name_t& locker)
{
return rados::cls::lock::break_lock(ioctx, oid, name, cookie, locker);
}
} // namespace lock
} // namespace cls
} // namespace rados
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