mirror of
https://github.com/ceph/ceph
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f45e480e8e
This is a portion of Part 1 of the namespace project: using ADL properly in encode and decode so we can use namespaces easily in Ceph. Signed-off-by: Adam C. Emerson <aemerson@redhat.com>
132 lines
3.9 KiB
C++
132 lines
3.9 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 CEPH_MMONPAXOS_H
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#define CEPH_MMONPAXOS_H
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#include "messages/PaxosServiceMessage.h"
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#include "mon/mon_types.h"
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#include "include/ceph_features.h"
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class MMonPaxos : public Message {
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static const int HEAD_VERSION = 4;
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static const int COMPAT_VERSION = 3;
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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: ceph_abort(); return 0;
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}
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}
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epoch_t epoch = 0; // monitor epoch
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__s32 op = 0; // paxos op
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version_t first_committed = 0; // i've committed to
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version_t last_committed = 0; // i've committed to
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version_t pn_from = 0; // i promise to accept after
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version_t pn = 0; // with with proposal
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version_t uncommitted_pn = 0; // previous pn, if we are a LAST with an uncommitted value
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utime_t lease_timestamp;
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utime_t sent_timestamp;
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version_t latest_version = 0;
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bufferlist latest_value;
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map<version_t,bufferlist> values;
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bufferlist feature_map;
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MMonPaxos() : Message(MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION) { }
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MMonPaxos(epoch_t e, int o, utime_t now) :
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Message(MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION),
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epoch(e),
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op(o),
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first_committed(0), last_committed(0), pn_from(0), pn(0), uncommitted_pn(0),
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sent_timestamp(now),
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latest_version(0) {
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}
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private:
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~MMonPaxos() override {}
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public:
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const char *get_type_name() const override { return "paxos"; }
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void print(ostream& out) const override {
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out << "paxos(" << get_opname(op)
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<< " lc " << last_committed
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<< " fc " << first_committed
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<< " pn " << pn << " opn " << uncommitted_pn;
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if (latest_version)
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out << " latest " << latest_version << " (" << latest_value.length() << " bytes)";
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out << ")";
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}
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void encode_payload(uint64_t features) override {
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using ceph::encode;
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header.version = HEAD_VERSION;
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encode(epoch, payload);
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encode(op, payload);
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encode(first_committed, 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_timestamp, payload);
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encode(sent_timestamp, payload);
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encode(latest_version, payload);
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encode(latest_value, payload);
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encode(values, payload);
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encode(feature_map, payload);
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}
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void decode_payload() override {
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bufferlist::iterator p = payload.begin();
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decode(epoch, p);
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decode(op, p);
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decode(first_committed, p);
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decode(last_committed, p);
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decode(pn_from, p);
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decode(pn, p);
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decode(uncommitted_pn, p);
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decode(lease_timestamp, p);
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decode(sent_timestamp, p);
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decode(latest_version, p);
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decode(latest_value, p);
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decode(values, p);
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if (header.version >= 4) {
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decode(feature_map, p);
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}
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}
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};
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#endif
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