]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
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) 2015 Red Hat | |
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 | #include "RadosDump.h" | |
16 | ||
20effc67 TL |
17 | using std::cerr; |
18 | using std::cout; | |
19 | ||
7c673cae FG |
20 | int RadosDump::read_super() |
21 | { | |
22 | bufferlist ebl; | |
11fdf7f2 | 23 | auto ebliter = ebl.cbegin(); |
7c673cae FG |
24 | ssize_t bytes; |
25 | ||
26 | bytes = ebl.read_fd(file_fd, super_header::FIXED_LENGTH); | |
27 | if ((size_t)bytes != super_header::FIXED_LENGTH) { | |
28 | cerr << "Unexpected EOF" << std::endl; | |
29 | return -EFAULT; | |
30 | } | |
31 | ||
32 | sh.decode(ebliter); | |
33 | ||
34 | return 0; | |
35 | } | |
36 | ||
37 | ||
38 | int RadosDump::get_header(header *h) | |
39 | { | |
40 | assert (h != NULL); | |
41 | ||
42 | bufferlist ebl; | |
11fdf7f2 | 43 | auto ebliter = ebl.cbegin(); |
7c673cae FG |
44 | ssize_t bytes; |
45 | ||
46 | bytes = ebl.read_fd(file_fd, sh.header_size); | |
47 | if ((size_t)bytes != sh.header_size) { | |
48 | cerr << "Unexpected EOF" << std::endl; | |
49 | return -EFAULT; | |
50 | } | |
51 | ||
52 | h->decode(ebliter); | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
57 | int RadosDump::get_footer(footer *f) | |
58 | { | |
11fdf7f2 | 59 | ceph_assert(f != NULL); |
7c673cae FG |
60 | |
61 | bufferlist ebl; | |
11fdf7f2 | 62 | auto ebliter = ebl.cbegin(); |
7c673cae FG |
63 | ssize_t bytes; |
64 | ||
65 | bytes = ebl.read_fd(file_fd, sh.footer_size); | |
66 | if ((size_t)bytes != sh.footer_size) { | |
67 | cerr << "Unexpected EOF" << std::endl; | |
68 | return -EFAULT; | |
69 | } | |
70 | ||
71 | f->decode(ebliter); | |
72 | ||
73 | if (f->magic != endmagic) { | |
74 | cerr << "Bad footer magic" << std::endl; | |
75 | return -EFAULT; | |
76 | } | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | int RadosDump::read_section(sectiontype_t *type, bufferlist *bl) | |
82 | { | |
83 | header hdr; | |
84 | ssize_t bytes; | |
85 | ||
86 | int ret = get_header(&hdr); | |
87 | if (ret) | |
88 | return ret; | |
89 | ||
90 | *type = hdr.type; | |
91 | ||
92 | bl->clear(); | |
93 | bytes = bl->read_fd(file_fd, hdr.size); | |
94 | if (bytes != hdr.size) { | |
95 | cerr << "Unexpected EOF" << std::endl; | |
96 | return -EFAULT; | |
97 | } | |
98 | ||
99 | if (hdr.size > 0) { | |
100 | footer ft; | |
101 | ret = get_footer(&ft); | |
102 | if (ret) | |
103 | return ret; | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | ||
110 | int RadosDump::skip_object(bufferlist &bl) | |
111 | { | |
7c673cae FG |
112 | bufferlist ebl; |
113 | bool done = false; | |
114 | while(!done) { | |
115 | sectiontype_t type; | |
116 | int ret = read_section(&type, &ebl); | |
117 | if (ret) | |
118 | return ret; | |
119 | ||
7c673cae FG |
120 | if (type >= END_OF_TYPES) { |
121 | cout << "Skipping unknown object section type" << std::endl; | |
122 | continue; | |
123 | } | |
124 | switch(type) { | |
125 | case TYPE_DATA: | |
126 | case TYPE_ATTRS: | |
127 | case TYPE_OMAP_HDR: | |
128 | case TYPE_OMAP: | |
129 | #ifdef DIAGNOSTIC | |
130 | cerr << "Skip type " << (int)type << std::endl; | |
131 | #endif | |
132 | break; | |
133 | case TYPE_OBJECT_END: | |
134 | done = true; | |
135 | break; | |
136 | default: | |
137 | cerr << "Can't skip unknown type: " << type << std::endl; | |
138 | return -EFAULT; | |
139 | } | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
144 | //Write super_header with its fixed 16 byte length | |
145 | void RadosDump::write_super() | |
146 | { | |
147 | if (dry_run) { | |
148 | return; | |
149 | } | |
150 | ||
151 | bufferlist superbl; | |
152 | super_header sh; | |
153 | footer ft; | |
154 | ||
155 | header hdr(TYPE_NONE, 0); | |
156 | hdr.encode(superbl); | |
157 | ||
158 | sh.magic = super_header::super_magic; | |
159 | sh.version = super_header::super_ver; | |
160 | sh.header_size = superbl.length(); | |
161 | superbl.clear(); | |
162 | ft.encode(superbl); | |
163 | sh.footer_size = superbl.length(); | |
164 | superbl.clear(); | |
165 | ||
166 | sh.encode(superbl); | |
11fdf7f2 | 167 | ceph_assert(super_header::FIXED_LENGTH == superbl.length()); |
7c673cae FG |
168 | superbl.write_fd(file_fd); |
169 | } |