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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 | #ifndef CEPH_MOSDPGPEERNOTIFY_H | |
16 | #define CEPH_MOSDPGPEERNOTIFY_H | |
17 | ||
18 | #include "msg/Message.h" | |
19 | ||
20 | #include "osd/osd_types.h" | |
21 | ||
22 | /* | |
23 | * PGNotify - notify primary of my PGs and versions. | |
24 | */ | |
25 | ||
9f95a23c | 26 | class MOSDPGNotify : public Message { |
11fdf7f2 | 27 | private: |
9f95a23c | 28 | static constexpr int HEAD_VERSION = 7; |
11fdf7f2 | 29 | static constexpr int COMPAT_VERSION = 6; |
7c673cae | 30 | |
d2e6a577 | 31 | epoch_t epoch = 0; |
7c673cae FG |
32 | /// query_epoch is the epoch of the query being responded to, or |
33 | /// the current epoch if this is not being sent in response to a | |
34 | /// query. This allows the recipient to disregard responses to old | |
35 | /// queries. | |
9f95a23c TL |
36 | using pg_list_t = std::vector<pg_notify_t>; |
37 | pg_list_t pg_list; | |
7c673cae FG |
38 | |
39 | public: | |
40 | version_t get_epoch() const { return epoch; } | |
9f95a23c | 41 | const pg_list_t& get_pg_list() const { |
7c673cae FG |
42 | return pg_list; |
43 | } | |
44 | ||
45 | MOSDPGNotify() | |
9f95a23c TL |
46 | : MOSDPGNotify(0, {}) |
47 | {} | |
48 | MOSDPGNotify(epoch_t e, pg_list_t&& l) | |
49 | : Message{MSG_OSD_PG_NOTIFY, HEAD_VERSION, COMPAT_VERSION}, | |
50 | epoch(e), | |
51 | pg_list(std::move(l)) { | |
7c673cae FG |
52 | set_priority(CEPH_MSG_PRIO_HIGH); |
53 | } | |
54 | private: | |
55 | ~MOSDPGNotify() override {} | |
56 | ||
57 | public: | |
11fdf7f2 | 58 | std::string_view get_type_name() const override { return "PGnot"; } |
7c673cae FG |
59 | |
60 | void encode_payload(uint64_t features) override { | |
11fdf7f2 | 61 | using ceph::encode; |
9f95a23c | 62 | header.version = HEAD_VERSION; |
11fdf7f2 | 63 | encode(epoch, payload); |
9f95a23c TL |
64 | if (!HAVE_FEATURE(features, SERVER_OCTOPUS)) { |
65 | // pretend to be vector<pair<pg_notify_t,PastIntervals>> | |
66 | header.version = 6; | |
67 | encode((uint32_t)pg_list.size(), payload); | |
68 | for (auto& i : pg_list) { | |
69 | encode(i, payload); // this embeds a dup (ignored) PastIntervals | |
70 | encode(i.past_intervals, payload); | |
71 | } | |
72 | return; | |
73 | } | |
11fdf7f2 | 74 | encode(pg_list, payload); |
7c673cae FG |
75 | } |
76 | ||
77 | void decode_payload() override { | |
11fdf7f2 TL |
78 | auto p = payload.cbegin(); |
79 | decode(epoch, p); | |
9f95a23c TL |
80 | if (header.version == 6) { |
81 | // decode legacy vector<pair<pg_notify_t,PastIntervals>> | |
82 | uint32_t num; | |
83 | decode(num, p); | |
84 | pg_list.resize(num); | |
85 | for (unsigned i = 0; i < num; ++i) { | |
86 | decode(pg_list[i], p); | |
87 | decode(pg_list[i].past_intervals, p); | |
88 | } | |
89 | return; | |
90 | } | |
11fdf7f2 | 91 | decode(pg_list, p); |
7c673cae FG |
92 | } |
93 | void print(ostream& out) const override { | |
94 | out << "pg_notify("; | |
95 | for (auto i = pg_list.begin(); | |
96 | i != pg_list.end(); | |
97 | ++i) { | |
98 | if (i != pg_list.begin()) | |
99 | out << " "; | |
9f95a23c | 100 | out << *i; |
7c673cae FG |
101 | } |
102 | out << " epoch " << epoch | |
103 | << ")"; | |
104 | } | |
9f95a23c TL |
105 | private: |
106 | template<class T, typename... Args> | |
107 | friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args); | |
7c673cae FG |
108 | }; |
109 | ||
110 | #endif |