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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.
*
*/
#ifndef CEPH_MLOCK_H
#define CEPH_MLOCK_H
#include "mds/locks.h"
#include "mds/SimpleLock.h"
#include "messages/MMDSOp.h"
class MLock final : public MMDSOp {
private:
static constexpr int HEAD_VERSION = 1;
static constexpr int COMPAT_VERSION = 1;
int32_t action = 0; // action type
mds_rank_t asker = 0; // who is initiating this request
metareqid_t reqid; // for remote lock requests
__u16 lock_type = 0; // lock object type
MDSCacheObjectInfo object_info;
ceph::buffer::list lockdata; // and possibly some data
public:
ceph::buffer::list& get_data() { return lockdata; }
const ceph::buffer::list& get_data() const { return lockdata; }
int get_asker() const { return asker; }
int get_action() const { return action; }
metareqid_t get_reqid() const { return reqid; }
int get_lock_type() const { return lock_type; }
const MDSCacheObjectInfo &get_object_info() const { return object_info; }
MDSCacheObjectInfo &get_object_info() { return object_info; }
protected:
MLock() : MMDSOp{MSG_MDS_LOCK, HEAD_VERSION, COMPAT_VERSION} {}
MLock(int ac, mds_rank_t as) :
MMDSOp{MSG_MDS_LOCK, HEAD_VERSION, COMPAT_VERSION},
action(ac), asker(as),
lock_type(0) { }
MLock(SimpleLock *lock, int ac, mds_rank_t as) :
MMDSOp{MSG_MDS_LOCK, HEAD_VERSION, COMPAT_VERSION},
action(ac), asker(as),
lock_type(lock->get_type()) {
lock->get_parent()->set_object_info(object_info);
}
MLock(SimpleLock *lock, int ac, mds_rank_t as, ceph::buffer::list& bl) :
MMDSOp{MSG_MDS_LOCK, HEAD_VERSION, COMPAT_VERSION},
action(ac), asker(as), lock_type(lock->get_type()) {
lock->get_parent()->set_object_info(object_info);
lockdata = std::move(bl);
}
~MLock() final {}
public:
std::string_view get_type_name() const override { return "ILock"; }
void print(std::ostream& out) const override {
out << "lock(a=" << SimpleLock::get_lock_action_name(action)
<< " " << SimpleLock::get_lock_type_name(lock_type)
<< " " << object_info
<< ")";
}
void set_reqid(metareqid_t ri) { reqid = ri; }
void set_data(const ceph::buffer::list& lockdata) {
this->lockdata = lockdata;
}
void decode_payload() override {
using ceph::decode;
auto p = payload.cbegin();
decode(asker, p);
decode(action, p);
decode(reqid, p);
decode(lock_type, p);
decode(object_info, p);
decode(lockdata, p);
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(asker, payload);
encode(action, payload);
encode(reqid, payload);
encode(lock_type, payload);
encode(object_info, payload);
encode(lockdata, payload);
}
private:
template<class T, typename... Args>
friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
};
#endif
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