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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_MMONELECTION_H
#define CEPH_MMONELECTION_H
#include "include/ceph_features.h"
#include "msg/Message.h"
#include "mon/MonMap.h"
class MMonElection : public Message {
static const int HEAD_VERSION = 3;
static const int COMPAT_VERSION = 2;
public:
static const int OP_PROPOSE = 1;
static const int OP_ACK = 2;
static const int OP_NAK = 3;
static const int OP_VICTORY = 4;
static const char *get_opname(int o) {
switch (o) {
case OP_PROPOSE: return "propose";
case OP_ACK: return "ack";
case OP_NAK: return "nak";
case OP_VICTORY: return "victory";
default: assert(0); return 0;
}
}
uuid_d fsid;
int32_t op;
epoch_t epoch;
bufferlist monmap_bl;
set<int> quorum;
uint64_t quorum_features;
MMonElection() : Message(MSG_MON_ELECTION, HEAD_VERSION, COMPAT_VERSION) { }
MMonElection(int o, epoch_t e, MonMap *m)
: Message(MSG_MON_ELECTION, HEAD_VERSION, COMPAT_VERSION),
fsid(m->fsid), op(o), epoch(e), quorum_features(0) {
// encode using full feature set; we will reencode for dest later,
// if necessary
m->encode(monmap_bl, CEPH_FEATURES_ALL);
}
private:
~MMonElection() {}
public:
const char *get_type_name() const { return "election"; }
void print(ostream& out) const {
out << "election(" << fsid << " " << get_opname(op) << " " << epoch << ")";
}
void encode_payload(uint64_t features) {
if (monmap_bl.length() && (features & CEPH_FEATURE_MONENC) == 0) {
// reencode old-format monmap
MonMap t;
t.decode(monmap_bl);
monmap_bl.clear();
t.encode(monmap_bl, features);
}
::encode(fsid, payload);
::encode(op, payload);
::encode(epoch, payload);
::encode(monmap_bl, payload);
::encode(quorum, payload);
::encode(quorum_features, payload);
}
void decode_payload() {
bufferlist::iterator p = payload.begin();
if (header.version >= 2)
::decode(fsid, p);
else
memset(&fsid, 0, sizeof(fsid));
::decode(op, p);
::decode(epoch, p);
::decode(monmap_bl, p);
::decode(quorum, p);
if (header.version >= 3)
::decode(quorum_features, p);
else
quorum_features = 0;
}
};
#endif
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