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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 | ||
16 | #ifndef CEPH_MMDSMAP_H | |
17 | #define CEPH_MMDSMAP_H | |
18 | ||
19 | #include "msg/Message.h" | |
20 | #include "mds/MDSMap.h" | |
21 | #include "include/ceph_features.h" | |
22 | ||
23 | class MMDSMap : public Message { | |
24 | static const int HEAD_VERSION = 1; | |
25 | static const int COMPAT_VERSION = 1; | |
26 | public: | |
27 | ||
28 | uuid_d fsid; | |
29 | epoch_t epoch; | |
30 | bufferlist encoded; | |
31 | ||
32 | version_t get_epoch() const { return epoch; } | |
33 | bufferlist& get_encoded() { return encoded; } | |
34 | ||
35 | MMDSMap() : | |
36 | Message(CEPH_MSG_MDS_MAP, HEAD_VERSION, COMPAT_VERSION) {} | |
28e407b8 | 37 | MMDSMap(const uuid_d &f, const MDSMap *mm) : |
7c673cae FG |
38 | Message(CEPH_MSG_MDS_MAP, HEAD_VERSION, COMPAT_VERSION), |
39 | fsid(f) { | |
40 | epoch = mm->get_epoch(); | |
41 | mm->encode(encoded, -1); // we will reencode with fewer features as necessary | |
42 | } | |
43 | private: | |
44 | ~MMDSMap() override {} | |
45 | ||
46 | public: | |
47 | const char *get_type_name() const override { return "mdsmap"; } | |
48 | void print(ostream& out) const override { | |
49 | out << "mdsmap(e " << epoch << ")"; | |
50 | } | |
51 | ||
52 | // marshalling | |
53 | void decode_payload() override { | |
54 | bufferlist::iterator p = payload.begin(); | |
55 | ::decode(fsid, p); | |
56 | ::decode(epoch, p); | |
57 | ::decode(encoded, p); | |
58 | } | |
59 | void encode_payload(uint64_t features) override { | |
60 | ::encode(fsid, payload); | |
61 | ::encode(epoch, payload); | |
62 | if ((features & CEPH_FEATURE_PGID64) == 0 || | |
63 | (features & CEPH_FEATURE_MDSENC) == 0 || | |
64 | (features & CEPH_FEATURE_MSG_ADDR2) == 0) { | |
65 | // reencode for old clients. | |
66 | MDSMap m; | |
67 | m.decode(encoded); | |
68 | encoded.clear(); | |
69 | m.encode(encoded, features); | |
70 | } | |
71 | ::encode(encoded, payload); | |
72 | } | |
73 | }; | |
74 | ||
75 | #endif |