mirror of
https://github.com/ceph/ceph
synced 2025-02-19 08:57:27 +00:00
665688c9de
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1543 29311d96-e01e-0410-9327-a35deaab8ce9
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef __MMONPAXOS_H
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#define __MMONPAXOS_H
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#include "msg/Message.h"
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#include "mon/mon_types.h"
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class MMonPaxos : public Message {
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public:
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// op types
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const static int OP_COLLECT = 1; // proposer: propose round
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const static int OP_LAST = 2; // voter: accept proposed round
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const static int OP_BEGIN = 3; // proposer: value proposed for this round
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const static int OP_ACCEPT = 4; // voter: accept propsed value
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const static int OP_COMMIT = 5; // proposer: notify learners of agreed value
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const static int OP_LEASE = 6; // leader: extend peon lease
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const static int OP_LEASE_ACK = 7; // peon: lease ack
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const static char *get_opname(int op) {
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switch (op) {
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case OP_COLLECT: return "collect";
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case OP_LAST: return "last";
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case OP_BEGIN: return "begin";
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case OP_ACCEPT: return "accept";
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case OP_COMMIT: return "commit";
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case OP_LEASE: return "lease";
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case OP_LEASE_ACK: return "lease_ack";
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default: assert(0); return 0;
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}
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}
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epoch_t epoch; // monitor epoch
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int op; // paxos op
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int machine_id; // which state machine?
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version_t last_committed; // i've committed to
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version_t pn_from; // i promise to accept after
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version_t pn; // with with proposal
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version_t uncommitted_pn; // previous pn, if we are a LAST with an uncommitted value
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utime_t lease_expire;
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map<version_t,bufferlist> values;
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MMonPaxos() : Message(MSG_MON_PAXOS) {}
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MMonPaxos(epoch_t e, int o, int mid) :
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Message(MSG_MON_PAXOS),
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epoch(e),
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op(o), machine_id(mid),
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last_committed(0), pn_from(0), pn(0), uncommitted_pn(0) { }
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virtual char *get_type_name() { return "paxos"; }
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void print(ostream& out) {
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out << "paxos(" << get_paxos_name(machine_id)
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<< " " << get_opname(op) << " lc " << last_committed
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<< " pn " << pn << " opn " << uncommitted_pn
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<< ")";
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}
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void encode_payload() {
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::_encode(epoch, payload);
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::_encode(op, payload);
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::_encode(machine_id, payload);
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::_encode(last_committed, payload);
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::_encode(pn_from, payload);
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::_encode(pn, payload);
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::_encode(uncommitted_pn, payload);
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::_encode(lease_expire, payload);
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::_encode(values, payload);
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}
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void decode_payload() {
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int off = 0;
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::_decode(epoch, payload, off);
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::_decode(op, payload, off);
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::_decode(machine_id, payload, off);
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::_decode(last_committed, payload, off);
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::_decode(pn_from, payload, off);
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::_decode(pn, payload, off);
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::_decode(uncommitted_pn, payload, off);
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::_decode(lease_expire, payload, off);
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::_decode(values, payload, off);
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}
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};
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#endif
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