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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
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. | |
12 | * | |
13 | */ | |
14 | ||
15 | ||
16 | #ifndef CEPH_MMONPAXOS_H | |
17 | #define CEPH_MMONPAXOS_H | |
18 | ||
19 | #include "messages/PaxosServiceMessage.h" | |
20 | #include "mon/mon_types.h" | |
21 | #include "include/ceph_features.h" | |
22 | ||
11fdf7f2 TL |
23 | class MMonPaxos : public MessageInstance<MMonPaxos> { |
24 | public: | |
25 | friend factory; | |
26 | private: | |
27 | static constexpr int HEAD_VERSION = 4; | |
28 | static constexpr int COMPAT_VERSION = 3; | |
7c673cae FG |
29 | |
30 | public: | |
31 | // op types | |
11fdf7f2 TL |
32 | static constexpr int OP_COLLECT = 1; // proposer: propose round |
33 | static constexpr int OP_LAST = 2; // voter: accept proposed round | |
34 | static constexpr int OP_BEGIN = 3; // proposer: value proposed for this round | |
35 | static constexpr int OP_ACCEPT = 4; // voter: accept propsed value | |
36 | static constexpr int OP_COMMIT = 5; // proposer: notify learners of agreed value | |
37 | static constexpr int OP_LEASE = 6; // leader: extend peon lease | |
38 | static constexpr int OP_LEASE_ACK = 7; // peon: lease ack | |
39 | static const char *get_opname(int op) { | |
7c673cae FG |
40 | switch (op) { |
41 | case OP_COLLECT: return "collect"; | |
42 | case OP_LAST: return "last"; | |
43 | case OP_BEGIN: return "begin"; | |
44 | case OP_ACCEPT: return "accept"; | |
45 | case OP_COMMIT: return "commit"; | |
46 | case OP_LEASE: return "lease"; | |
47 | case OP_LEASE_ACK: return "lease_ack"; | |
48 | default: ceph_abort(); return 0; | |
49 | } | |
50 | } | |
51 | ||
d2e6a577 FG |
52 | epoch_t epoch = 0; // monitor epoch |
53 | __s32 op = 0; // paxos op | |
7c673cae | 54 | |
d2e6a577 FG |
55 | version_t first_committed = 0; // i've committed to |
56 | version_t last_committed = 0; // i've committed to | |
57 | version_t pn_from = 0; // i promise to accept after | |
58 | version_t pn = 0; // with with proposal | |
59 | version_t uncommitted_pn = 0; // previous pn, if we are a LAST with an uncommitted value | |
7c673cae FG |
60 | utime_t lease_timestamp; |
61 | utime_t sent_timestamp; | |
62 | ||
d2e6a577 | 63 | version_t latest_version = 0; |
7c673cae FG |
64 | bufferlist latest_value; |
65 | ||
66 | map<version_t,bufferlist> values; | |
67 | ||
31f18b77 FG |
68 | bufferlist feature_map; |
69 | ||
11fdf7f2 | 70 | MMonPaxos() : MessageInstance(MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION) { } |
7c673cae | 71 | MMonPaxos(epoch_t e, int o, utime_t now) : |
11fdf7f2 | 72 | MessageInstance(MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION), |
7c673cae FG |
73 | epoch(e), |
74 | op(o), | |
75 | first_committed(0), last_committed(0), pn_from(0), pn(0), uncommitted_pn(0), | |
76 | sent_timestamp(now), | |
77 | latest_version(0) { | |
78 | } | |
79 | ||
80 | private: | |
81 | ~MMonPaxos() override {} | |
82 | ||
83 | public: | |
11fdf7f2 | 84 | std::string_view get_type_name() const override { return "paxos"; } |
7c673cae FG |
85 | |
86 | void print(ostream& out) const override { | |
87 | out << "paxos(" << get_opname(op) | |
88 | << " lc " << last_committed | |
89 | << " fc " << first_committed | |
90 | << " pn " << pn << " opn " << uncommitted_pn; | |
91 | if (latest_version) | |
92 | out << " latest " << latest_version << " (" << latest_value.length() << " bytes)"; | |
93 | out << ")"; | |
94 | } | |
95 | ||
96 | void encode_payload(uint64_t features) override { | |
11fdf7f2 | 97 | using ceph::encode; |
7c673cae | 98 | header.version = HEAD_VERSION; |
11fdf7f2 TL |
99 | encode(epoch, payload); |
100 | encode(op, payload); | |
101 | encode(first_committed, payload); | |
102 | encode(last_committed, payload); | |
103 | encode(pn_from, payload); | |
104 | encode(pn, payload); | |
105 | encode(uncommitted_pn, payload); | |
106 | encode(lease_timestamp, payload); | |
107 | encode(sent_timestamp, payload); | |
108 | encode(latest_version, payload); | |
109 | encode(latest_value, payload); | |
110 | encode(values, payload); | |
111 | encode(feature_map, payload); | |
7c673cae FG |
112 | } |
113 | void decode_payload() override { | |
11fdf7f2 TL |
114 | auto p = payload.cbegin(); |
115 | decode(epoch, p); | |
116 | decode(op, p); | |
117 | decode(first_committed, p); | |
118 | decode(last_committed, p); | |
119 | decode(pn_from, p); | |
120 | decode(pn, p); | |
121 | decode(uncommitted_pn, p); | |
122 | decode(lease_timestamp, p); | |
123 | decode(sent_timestamp, p); | |
124 | decode(latest_version, p); | |
125 | decode(latest_value, p); | |
126 | decode(values, p); | |
31f18b77 | 127 | if (header.version >= 4) { |
11fdf7f2 | 128 | decode(feature_map, p); |
31f18b77 | 129 | } |
7c673cae FG |
130 | } |
131 | }; | |
132 | ||
133 | #endif |