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Diffstat (limited to 'src/messages/MMonPaxos.h')
| -rw-r--r-- | src/messages/MMonPaxos.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/messages/MMonPaxos.h b/src/messages/MMonPaxos.h new file mode 100644 index 000000000..e1aabc64c --- /dev/null +++ b/src/messages/MMonPaxos.h @@ -0,0 +1,135 @@ +// -*- 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_MMONPAXOS_H +#define CEPH_MMONPAXOS_H + +#include "messages/PaxosServiceMessage.h" +#include "mon/mon_types.h" +#include "include/ceph_features.h" + +class MMonPaxos final : public Message { +private: + static constexpr int HEAD_VERSION = 4; + static constexpr int COMPAT_VERSION = 3; + + public: + // op types + static constexpr int OP_COLLECT = 1; // proposer: propose round + static constexpr int OP_LAST = 2; // voter: accept proposed round + static constexpr int OP_BEGIN = 3; // proposer: value proposed for this round + static constexpr int OP_ACCEPT = 4; // voter: accept propsed value + static constexpr int OP_COMMIT = 5; // proposer: notify learners of agreed value + static constexpr int OP_LEASE = 6; // leader: extend peon lease + static constexpr int OP_LEASE_ACK = 7; // peon: lease ack + static const char *get_opname(int op) { + switch (op) { + case OP_COLLECT: return "collect"; + case OP_LAST: return "last"; + case OP_BEGIN: return "begin"; + case OP_ACCEPT: return "accept"; + case OP_COMMIT: return "commit"; + case OP_LEASE: return "lease"; + case OP_LEASE_ACK: return "lease_ack"; + default: ceph_abort(); return 0; + } + } + + epoch_t epoch = 0; // monitor epoch + __s32 op = 0; // paxos op + + version_t first_committed = 0; // i've committed to + version_t last_committed = 0; // i've committed to + version_t pn_from = 0; // i promise to accept after + version_t pn = 0; // with with proposal + version_t uncommitted_pn = 0; // previous pn, if we are a LAST with an uncommitted value + utime_t lease_timestamp; + utime_t sent_timestamp; + + version_t latest_version = 0; + ceph::buffer::list latest_value; + + std::map<version_t,ceph::buffer::list> values; + + ceph::buffer::list feature_map; + + MMonPaxos() : Message{MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION} { } + MMonPaxos(epoch_t e, int o, utime_t now) : + Message{MSG_MON_PAXOS, HEAD_VERSION, COMPAT_VERSION}, + epoch(e), + op(o), + first_committed(0), last_committed(0), pn_from(0), pn(0), uncommitted_pn(0), + sent_timestamp(now), + latest_version(0) { + } + +private: + ~MMonPaxos() final {} + +public: + std::string_view get_type_name() const override { return "paxos"; } + + void print(std::ostream& out) const override { + out << "paxos(" << get_opname(op) + << " lc " << last_committed + << " fc " << first_committed + << " pn " << pn << " opn " << uncommitted_pn; + if (latest_version) + out << " latest " << latest_version << " (" << latest_value.length() << " bytes)"; + out << ")"; + } + + void encode_payload(uint64_t features) override { + using ceph::encode; + header.version = HEAD_VERSION; + encode(epoch, payload); + encode(op, payload); + encode(first_committed, payload); + encode(last_committed, payload); + encode(pn_from, payload); + encode(pn, payload); + encode(uncommitted_pn, payload); + encode(lease_timestamp, payload); + encode(sent_timestamp, payload); + encode(latest_version, payload); + encode(latest_value, payload); + encode(values, payload); + encode(feature_map, payload); + } + void decode_payload() override { + using ceph::decode; + auto p = payload.cbegin(); + decode(epoch, p); + decode(op, p); + decode(first_committed, p); + decode(last_committed, p); + decode(pn_from, p); + decode(pn, p); + decode(uncommitted_pn, p); + decode(lease_timestamp, p); + decode(sent_timestamp, p); + decode(latest_version, p); + decode(latest_value, p); + decode(values, p); + if (header.version >= 4) { + decode(feature_map, p); + } + } +private: + template<class T, typename... Args> + friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args); +}; + +#endif |