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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
commit19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch)
tree42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/messages/MMonPaxos.h
parentInitial commit. (diff)
downloadceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz
ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/messages/MMonPaxos.h')
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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_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