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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_MCLIENTRECONNECT_H | |
16 | #define CEPH_MCLIENTRECONNECT_H | |
17 | ||
18 | #include "msg/Message.h" | |
19 | #include "mds/mdstypes.h" | |
20 | #include "include/ceph_features.h" | |
21 | ||
22 | ||
11fdf7f2 TL |
23 | class MClientReconnect : public MessageInstance<MClientReconnect> { |
24 | public: | |
25 | friend factory; | |
26 | private: | |
27 | static constexpr int HEAD_VERSION = 5; | |
28 | static constexpr int COMPAT_VERSION = 4; | |
7c673cae FG |
29 | |
30 | public: | |
11fdf7f2 TL |
31 | map<inodeno_t, cap_reconnect_t> caps; // only head inodes |
32 | vector<snaprealm_reconnect_t> realms; | |
33 | bool more = false; | |
7c673cae | 34 | |
11fdf7f2 TL |
35 | MClientReconnect() : |
36 | MessageInstance(CEPH_MSG_CLIENT_RECONNECT, HEAD_VERSION, COMPAT_VERSION) {} | |
7c673cae FG |
37 | private: |
38 | ~MClientReconnect() override {} | |
39 | ||
11fdf7f2 TL |
40 | size_t cap_size = 0; |
41 | size_t realm_size = 0; | |
42 | size_t approx_size = sizeof(__u32) + sizeof(__u32) + 1; | |
43 | ||
44 | void calc_item_size() { | |
45 | using ceph::encode; | |
46 | { | |
47 | bufferlist bl; | |
48 | inodeno_t ino; | |
49 | cap_reconnect_t cr; | |
50 | encode(ino, bl); | |
51 | encode(cr, bl); | |
52 | cap_size = bl.length(); | |
53 | } | |
54 | { | |
55 | bufferlist bl; | |
56 | snaprealm_reconnect_t sr; | |
57 | encode(sr, bl); | |
58 | realm_size = bl.length(); | |
59 | } | |
60 | } | |
61 | ||
7c673cae | 62 | public: |
11fdf7f2 | 63 | std::string_view get_type_name() const override { return "client_reconnect"; } |
7c673cae FG |
64 | void print(ostream& out) const override { |
65 | out << "client_reconnect(" | |
11fdf7f2 TL |
66 | << caps.size() << " caps " << realms.size() << " realms )"; |
67 | } | |
68 | ||
69 | // Force to use old encoding. | |
70 | // Use connection's features to choose encoding if version is set to 0. | |
71 | void set_encoding_version(int v) { | |
72 | header.version = v; | |
73 | if (v <= 3) | |
74 | header.compat_version = 0; | |
75 | } | |
76 | size_t get_approx_size() { | |
77 | return approx_size; | |
7c673cae | 78 | } |
11fdf7f2 TL |
79 | void mark_more() { more = true; } |
80 | bool has_more() const { return more; } | |
7c673cae FG |
81 | |
82 | void add_cap(inodeno_t ino, uint64_t cap_id, inodeno_t pathbase, const string& path, | |
83 | int wanted, int issued, inodeno_t sr, snapid_t sf, bufferlist& lb) | |
84 | { | |
85 | caps[ino] = cap_reconnect_t(cap_id, pathbase, path, wanted, issued, sr, sf, lb); | |
11fdf7f2 TL |
86 | if (!cap_size) |
87 | calc_item_size(); | |
88 | approx_size += cap_size + path.length() + lb.length(); | |
7c673cae FG |
89 | } |
90 | void add_snaprealm(inodeno_t ino, snapid_t seq, inodeno_t parent) { | |
11fdf7f2 TL |
91 | snaprealm_reconnect_t r; |
92 | r.realm.ino = ino; | |
93 | r.realm.seq = seq; | |
94 | r.realm.parent = parent; | |
7c673cae | 95 | realms.push_back(r); |
11fdf7f2 TL |
96 | if (!realm_size) |
97 | calc_item_size(); | |
98 | approx_size += realm_size; | |
7c673cae FG |
99 | } |
100 | ||
101 | void encode_payload(uint64_t features) override { | |
11fdf7f2 TL |
102 | if (header.version == 0) { |
103 | if (features & CEPH_FEATURE_MDSENC) | |
104 | header.version = 3; | |
105 | else if (features & CEPH_FEATURE_FLOCK) | |
106 | header.version = 2; | |
107 | else | |
108 | header.version = 1; | |
109 | } | |
110 | ||
111 | using ceph::encode; | |
7c673cae | 112 | data.clear(); |
11fdf7f2 TL |
113 | |
114 | if (header.version >= 4) { | |
115 | encode(caps, data); | |
116 | encode(realms, data); | |
117 | encode(more, data); | |
7c673cae FG |
118 | } else { |
119 | // compat crap | |
11fdf7f2 TL |
120 | if (header.version == 3) { |
121 | encode(caps, data); | |
122 | } else if (header.version == 2) { | |
123 | __u32 n = caps.size(); | |
124 | encode(n, data); | |
125 | for (auto& p : caps) { | |
126 | encode(p.first, data); | |
127 | p.second.encode_old(data); | |
128 | } | |
129 | } else { | |
130 | map<inodeno_t, old_cap_reconnect_t> ocaps; | |
131 | for (auto& p : caps) { | |
132 | ocaps[p.first] = p.second; | |
133 | encode(ocaps, data); | |
134 | } | |
135 | for (auto& r : realms) | |
136 | r.encode_old(data); | |
137 | } | |
7c673cae | 138 | } |
7c673cae FG |
139 | } |
140 | void decode_payload() override { | |
11fdf7f2 TL |
141 | auto p = data.cbegin(); |
142 | if (header.version >= 4) { | |
143 | decode(caps, p); | |
144 | decode(realms, p); | |
145 | if (header.version >= 5) | |
146 | decode(more, p); | |
7c673cae FG |
147 | } else { |
148 | // compat crap | |
11fdf7f2 TL |
149 | if (header.version == 3) { |
150 | decode(caps, p); | |
151 | } else if (header.version == 2) { | |
152 | __u32 n; | |
153 | decode(n, p); | |
154 | inodeno_t ino; | |
155 | while (n--) { | |
156 | decode(ino, p); | |
157 | caps[ino].decode_old(p); | |
158 | } | |
159 | } else { | |
160 | map<inodeno_t, old_cap_reconnect_t> ocaps; | |
161 | decode(ocaps, p); | |
162 | for (auto &q : ocaps) | |
163 | caps[q.first] = q.second; | |
164 | } | |
165 | while (!p.end()) { | |
166 | realms.push_back(snaprealm_reconnect_t()); | |
167 | realms.back().decode_old(p); | |
168 | } | |
7c673cae FG |
169 | } |
170 | } | |
7c673cae FG |
171 | }; |
172 | ||
173 | ||
174 | #endif |