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_MOSDPGLOG_H
17 #define CEPH_MOSDPGLOG_H
19 #include "msg/Message.h"
21 class MOSDPGLog : public Message {
23 static const int HEAD_VERSION = 5;
24 static const int COMPAT_VERSION = 2;
27 /// query_epoch is the epoch of the query being responded to, or
28 /// the current epoch if this is not being sent in response to a
29 /// query. This allows the recipient to disregard responses to old
31 epoch_t query_epoch = 0;
39 PastIntervals past_intervals;
41 epoch_t get_epoch() const { return epoch; }
42 spg_t get_pgid() const { return spg_t(info.pgid.pgid, to); }
43 epoch_t get_query_epoch() const { return query_epoch; }
45 MOSDPGLog() : Message(MSG_OSD_PG_LOG, HEAD_VERSION, COMPAT_VERSION) {
46 set_priority(CEPH_MSG_PRIO_HIGH);
48 MOSDPGLog(shard_id_t to, shard_id_t from, version_t mv, pg_info_t& i)
49 : Message(MSG_OSD_PG_LOG, HEAD_VERSION, COMPAT_VERSION),
50 epoch(mv), query_epoch(mv),
53 set_priority(CEPH_MSG_PRIO_HIGH);
55 MOSDPGLog(shard_id_t to, shard_id_t from,
56 version_t mv, pg_info_t& i, epoch_t query_epoch)
57 : Message(MSG_OSD_PG_LOG, HEAD_VERSION, COMPAT_VERSION),
58 epoch(mv), query_epoch(query_epoch),
61 set_priority(CEPH_MSG_PRIO_HIGH);
65 ~MOSDPGLog() override {}
68 const char *get_type_name() const override { return "PGlog"; }
69 void print(ostream& out) const override {
70 // NOTE: log is not const, but operator<< doesn't touch fields
71 // swapped out by OSD code.
72 out << "pg_log(" << info.pgid << " epoch " << epoch
74 << " pi " << past_intervals
75 << " query_epoch " << query_epoch << ")";
78 void encode_payload(uint64_t features) override {
79 ::encode(epoch, payload);
80 ::encode(info, payload);
81 ::encode(log, payload);
82 ::encode(missing, payload);
83 ::encode(query_epoch, payload);
84 if (HAVE_FEATURE(features, SERVER_LUMINOUS)) {
85 header.version = HEAD_VERSION;
86 ::encode(past_intervals, payload);
89 past_intervals.encode_classic(payload);
91 ::encode(to, payload);
92 ::encode(from, payload);
94 void decode_payload() override {
95 bufferlist::iterator p = payload.begin();
98 log.decode(p, info.pgid.pool());
99 missing.decode(p, info.pgid.pool());
100 if (header.version >= 2) {
101 ::decode(query_epoch, p);
103 if (header.version >= 3) {
104 if (header.version >= 5) {
105 ::decode(past_intervals, p);
107 past_intervals.decode_classic(p);
110 if (header.version >= 4) {
114 to = shard_id_t::NO_SHARD;
115 from = shard_id_t::NO_SHARD;