1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
16 #ifndef CEPH_MMONELECTION_H
17 #define CEPH_MMONELECTION_H
19 #include "msg/Message.h"
20 #include "mon/MonMap.h"
21 #include "mon/mon_types.h"
23 class MMonElection : public Message {
25 static const int HEAD_VERSION = 7;
26 static const int COMPAT_VERSION = 5;
29 static const int OP_PROPOSE = 1;
30 static const int OP_ACK = 2;
31 static const int OP_NAK = 3;
32 static const int OP_VICTORY = 4;
33 static const char *get_opname(int o) {
35 case OP_PROPOSE: return "propose";
36 case OP_ACK: return "ack";
37 case OP_NAK: return "nak";
38 case OP_VICTORY: return "victory";
39 default: ceph_abort(); return 0;
48 uint64_t quorum_features;
49 mon_feature_t mon_features;
50 bufferlist sharing_bl;
51 map<string,string> metadata;
53 MMonElection() : Message(MSG_MON_ELECTION, HEAD_VERSION, COMPAT_VERSION),
59 MMonElection(int o, epoch_t e, MonMap *m)
60 : Message(MSG_MON_ELECTION, HEAD_VERSION, COMPAT_VERSION),
61 fsid(m->fsid), op(o), epoch(e),
65 // encode using full feature set; we will reencode for dest later,
67 m->encode(monmap_bl, CEPH_FEATURES_ALL);
70 ~MMonElection() override {}
73 const char *get_type_name() const override { return "election"; }
74 void print(ostream& out) const override {
75 out << "election(" << fsid << " " << get_opname(op) << " " << epoch << ")";
78 void encode_payload(uint64_t features) override {
79 if (monmap_bl.length() && (features != CEPH_FEATURES_ALL)) {
80 // reencode old-format monmap
84 t.encode(monmap_bl, features);
87 ::encode(fsid, payload);
88 ::encode(op, payload);
89 ::encode(epoch, payload);
90 ::encode(monmap_bl, payload);
91 ::encode(quorum, payload);
92 ::encode(quorum_features, payload);
93 ::encode((version_t)0, payload); // defunct
94 ::encode((version_t)0, payload); // defunct
95 ::encode(sharing_bl, payload);
96 ::encode(mon_features, payload);
97 ::encode(metadata, payload);
99 void decode_payload() override {
100 bufferlist::iterator p = payload.begin();
104 ::decode(monmap_bl, p);
106 ::decode(quorum_features, p);
108 version_t v; // defunct fields from old encoding
112 ::decode(sharing_bl, p);
113 if (header.version >= 6)
114 ::decode(mon_features, p);
115 if (header.version >= 7)
116 ::decode(metadata, p);