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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_MMONSUBSCRIBE_H | |
16 | #define CEPH_MMONSUBSCRIBE_H | |
17 | ||
18 | #include "msg/Message.h" | |
19 | #include "include/ceph_features.h" | |
20 | ||
21 | /* | |
22 | * compatibility with old crap | |
23 | */ | |
24 | struct ceph_mon_subscribe_item_old { | |
eafe8130 TL |
25 | ceph_le64 unused; |
26 | ceph_le64 have; | |
7c673cae FG |
27 | __u8 onetime; |
28 | } __attribute__ ((packed)); | |
29 | WRITE_RAW_ENCODER(ceph_mon_subscribe_item_old) | |
30 | ||
31 | ||
9f95a23c | 32 | class MMonSubscribe : public Message { |
11fdf7f2 | 33 | public: |
11fdf7f2 TL |
34 | static constexpr int HEAD_VERSION = 3; |
35 | static constexpr int COMPAT_VERSION = 1; | |
7c673cae | 36 | |
9f95a23c TL |
37 | std::string hostname; |
38 | std::map<std::string, ceph_mon_subscribe_item> what; | |
39 | ||
40 | MMonSubscribe() : Message{CEPH_MSG_MON_SUBSCRIBE, HEAD_VERSION, COMPAT_VERSION} { } | |
7c673cae FG |
41 | private: |
42 | ~MMonSubscribe() override {} | |
43 | ||
9f95a23c | 44 | public: |
7c673cae FG |
45 | void sub_want(const char *w, version_t start, unsigned flags) { |
46 | what[w].start = start; | |
47 | what[w].flags = flags; | |
48 | } | |
49 | ||
11fdf7f2 | 50 | std::string_view get_type_name() const override { return "mon_subscribe"; } |
9f95a23c | 51 | void print(std::ostream& o) const override { |
7c673cae FG |
52 | o << "mon_subscribe(" << what << ")"; |
53 | } | |
54 | ||
55 | void decode_payload() override { | |
9f95a23c | 56 | using ceph::decode; |
11fdf7f2 | 57 | auto p = payload.cbegin(); |
7c673cae | 58 | if (header.version < 2) { |
9f95a23c | 59 | std::map<std::string, ceph_mon_subscribe_item_old> oldwhat; |
11fdf7f2 | 60 | decode(oldwhat, p); |
7c673cae | 61 | what.clear(); |
9f95a23c | 62 | for (auto q = oldwhat.begin(); q != oldwhat.end(); q++) { |
7c673cae FG |
63 | if (q->second.have) |
64 | what[q->first].start = q->second.have + 1; | |
65 | else | |
66 | what[q->first].start = 0; | |
67 | what[q->first].flags = 0; | |
68 | if (q->second.onetime) | |
69 | what[q->first].flags |= CEPH_SUBSCRIBE_ONETIME; | |
70 | } | |
11fdf7f2 TL |
71 | return; |
72 | } | |
73 | decode(what, p); | |
74 | if (header.version >= 3) { | |
75 | decode(hostname, p); | |
7c673cae FG |
76 | } |
77 | } | |
78 | void encode_payload(uint64_t features) override { | |
11fdf7f2 TL |
79 | using ceph::encode; |
80 | if ((features & CEPH_FEATURE_SUBSCRIBE2) == 0) { | |
7c673cae | 81 | header.version = 0; |
9f95a23c TL |
82 | std::map<std::string, ceph_mon_subscribe_item_old> oldwhat; |
83 | for (auto q = what.begin(); q != what.end(); q++) { | |
7c673cae FG |
84 | if (q->second.start) |
85 | // warning: start=1 -> have=0, which was ambiguous | |
86 | oldwhat[q->first].have = q->second.start - 1; | |
87 | else | |
88 | oldwhat[q->first].have = 0; | |
89 | oldwhat[q->first].onetime = q->second.flags & CEPH_SUBSCRIBE_ONETIME; | |
90 | } | |
11fdf7f2 TL |
91 | encode(oldwhat, payload); |
92 | return; | |
7c673cae | 93 | } |
11fdf7f2 TL |
94 | header.version = HEAD_VERSION; |
95 | encode(what, payload); | |
96 | encode(hostname, payload); | |
7c673cae | 97 | } |
9f95a23c TL |
98 | private: |
99 | template<class T, typename... Args> | |
100 | friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args); | |
7c673cae FG |
101 | }; |
102 | ||
103 | #endif |