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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_OBJECT_H | |
16 | #define CEPH_OBJECT_H | |
17 | ||
18 | #include <stdint.h> | |
19 | #include <stdio.h> | |
20 | ||
21 | #include <iosfwd> | |
22 | #include <iomanip> | |
23 | using namespace std; | |
24 | ||
25 | #include "include/unordered_map.h" | |
26 | ||
27 | #include "hash.h" | |
28 | #include "encoding.h" | |
29 | #include "ceph_hash.h" | |
30 | #include "cmp.h" | |
31 | ||
32 | struct object_t { | |
33 | string name; | |
34 | ||
35 | object_t() {} | |
36 | // cppcheck-suppress noExplicitConstructor | |
37 | object_t(const char *s) : name(s) {} | |
38 | // cppcheck-suppress noExplicitConstructor | |
39 | object_t(const string& s) : name(s) {} | |
40 | ||
41 | void swap(object_t& o) { | |
42 | name.swap(o.name); | |
43 | } | |
44 | void clear() { | |
45 | name.clear(); | |
46 | } | |
47 | ||
48 | void encode(bufferlist &bl) const { | |
49 | ::encode(name, bl); | |
50 | } | |
51 | void decode(bufferlist::iterator &bl) { | |
52 | ::decode(name, bl); | |
53 | } | |
54 | }; | |
55 | WRITE_CLASS_ENCODER(object_t) | |
56 | ||
57 | inline bool operator==(const object_t& l, const object_t& r) { | |
58 | return l.name == r.name; | |
59 | } | |
60 | inline bool operator!=(const object_t& l, const object_t& r) { | |
61 | return l.name != r.name; | |
62 | } | |
63 | inline bool operator>(const object_t& l, const object_t& r) { | |
64 | return l.name > r.name; | |
65 | } | |
66 | inline bool operator<(const object_t& l, const object_t& r) { | |
67 | return l.name < r.name; | |
68 | } | |
69 | inline bool operator>=(const object_t& l, const object_t& r) { | |
70 | return l.name >= r.name; | |
71 | } | |
72 | inline bool operator<=(const object_t& l, const object_t& r) { | |
73 | return l.name <= r.name; | |
74 | } | |
75 | inline ostream& operator<<(ostream& out, const object_t& o) { | |
76 | return out << o.name; | |
77 | } | |
78 | ||
79 | namespace std { | |
80 | template<> struct hash<object_t> { | |
81 | size_t operator()(const object_t& r) const { | |
82 | //static hash<string> H; | |
83 | //return H(r.name); | |
84 | return ceph_str_hash_linux(r.name.c_str(), r.name.length()); | |
85 | } | |
86 | }; | |
87 | } // namespace std | |
88 | ||
89 | ||
90 | struct file_object_t { | |
91 | uint64_t ino, bno; | |
92 | mutable char buf[34]; | |
93 | ||
94 | file_object_t(uint64_t i=0, uint64_t b=0) : ino(i), bno(b) { | |
95 | buf[0] = 0; | |
96 | } | |
97 | ||
98 | const char *c_str() const { | |
99 | if (!buf[0]) | |
100 | snprintf(buf, sizeof(buf), "%llx.%08llx", (long long unsigned)ino, (long long unsigned)bno); | |
101 | return buf; | |
102 | } | |
103 | ||
104 | operator object_t() { | |
105 | return object_t(c_str()); | |
106 | } | |
107 | }; | |
108 | ||
109 | ||
110 | // --------------------------- | |
111 | // snaps | |
112 | ||
113 | struct snapid_t { | |
114 | uint64_t val; | |
115 | // cppcheck-suppress noExplicitConstructor | |
116 | snapid_t(uint64_t v=0) : val(v) {} | |
117 | snapid_t operator+=(snapid_t o) { val += o.val; return *this; } | |
118 | snapid_t operator++() { ++val; return *this; } | |
119 | operator uint64_t() const { return val; } | |
120 | }; | |
121 | ||
122 | inline void encode(snapid_t i, bufferlist &bl) { encode(i.val, bl); } | |
123 | inline void decode(snapid_t &i, bufferlist::iterator &p) { decode(i.val, p); } | |
124 | ||
125 | template<> | |
126 | struct denc_traits<snapid_t> { | |
127 | static constexpr bool supported = true; | |
128 | static constexpr bool featured = false; | |
129 | static constexpr bool bounded = true; | |
31f18b77 | 130 | static constexpr bool need_contiguous = true; |
7c673cae FG |
131 | static void bound_encode(const snapid_t& o, size_t& p) { |
132 | denc(o.val, p); | |
133 | } | |
134 | static void encode(const snapid_t &o, buffer::list::contiguous_appender& p) { | |
135 | denc(o.val, p); | |
136 | } | |
137 | static void decode(snapid_t& o, buffer::ptr::iterator &p) { | |
138 | denc(o.val, p); | |
139 | } | |
140 | }; | |
141 | ||
31f18b77 | 142 | inline ostream& operator<<(ostream& out, const snapid_t& s) { |
7c673cae FG |
143 | if (s == CEPH_NOSNAP) |
144 | return out << "head"; | |
145 | else if (s == CEPH_SNAPDIR) | |
146 | return out << "snapdir"; | |
147 | else | |
148 | return out << hex << s.val << dec; | |
149 | } | |
150 | ||
151 | ||
152 | struct sobject_t { | |
153 | object_t oid; | |
154 | snapid_t snap; | |
155 | ||
156 | sobject_t() : snap(0) {} | |
157 | sobject_t(object_t o, snapid_t s) : oid(o), snap(s) {} | |
158 | ||
159 | void swap(sobject_t& o) { | |
160 | oid.swap(o.oid); | |
161 | snapid_t t = snap; | |
162 | snap = o.snap; | |
163 | o.snap = t; | |
164 | } | |
165 | ||
166 | void encode(bufferlist& bl) const { | |
167 | ::encode(oid, bl); | |
168 | ::encode(snap, bl); | |
169 | } | |
170 | void decode(bufferlist::iterator& bl) { | |
171 | ::decode(oid, bl); | |
172 | ::decode(snap, bl); | |
173 | } | |
174 | }; | |
175 | WRITE_CLASS_ENCODER(sobject_t) | |
176 | ||
177 | inline bool operator==(const sobject_t &l, const sobject_t &r) { | |
178 | return l.oid == r.oid && l.snap == r.snap; | |
179 | } | |
180 | inline bool operator!=(const sobject_t &l, const sobject_t &r) { | |
181 | return l.oid != r.oid || l.snap != r.snap; | |
182 | } | |
183 | inline bool operator>(const sobject_t &l, const sobject_t &r) { | |
184 | return l.oid > r.oid || (l.oid == r.oid && l.snap > r.snap); | |
185 | } | |
186 | inline bool operator<(const sobject_t &l, const sobject_t &r) { | |
187 | return l.oid < r.oid || (l.oid == r.oid && l.snap < r.snap); | |
188 | } | |
189 | inline bool operator>=(const sobject_t &l, const sobject_t &r) { | |
190 | return l.oid > r.oid || (l.oid == r.oid && l.snap >= r.snap); | |
191 | } | |
192 | inline bool operator<=(const sobject_t &l, const sobject_t &r) { | |
193 | return l.oid < r.oid || (l.oid == r.oid && l.snap <= r.snap); | |
194 | } | |
195 | inline ostream& operator<<(ostream& out, const sobject_t &o) { | |
196 | return out << o.oid << "/" << o.snap; | |
197 | } | |
198 | namespace std { | |
199 | template<> struct hash<sobject_t> { | |
200 | size_t operator()(const sobject_t &r) const { | |
201 | static hash<object_t> H; | |
202 | static rjhash<uint64_t> I; | |
203 | return H(r.oid) ^ I(r.snap); | |
204 | } | |
205 | }; | |
206 | } // namespace std | |
207 | ||
208 | #endif |