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1 | /* |
2 | * Ceph - scalable distributed file system | |
3 | * | |
4 | * Copyright (C) 2004-2010 Sage Weil <sage@newdream.net> | |
5 | * | |
6 | * This is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License version 2.1, as published by the Free Software | |
9 | * Foundation. See file COPYING.LIB. | |
10 | * | |
11 | */ | |
12 | ||
13 | #ifndef CEPH_RBD_TYPES_H | |
14 | #define CEPH_RBD_TYPES_H | |
15 | ||
16 | ||
17 | /* | |
18 | * rbd image 'foo' consists of objects | |
19 | * foo.rbd - image metadata | |
20 | * foo.00000000 | |
21 | * foo.00000001 | |
22 | * ... - data | |
23 | */ | |
24 | ||
25 | #define RBD_SUFFIX ".rbd" | |
26 | #define RBD_DIRECTORY "rbd_directory" | |
27 | #define RBD_INFO "rbd_info" | |
28 | ||
29 | #define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */ | |
30 | ||
31 | #define RBD_MAX_OBJ_NAME_SIZE 96 | |
32 | #define RBD_MAX_BLOCK_NAME_SIZE 24 | |
33 | #define RBD_MAX_SEG_NAME_SIZE 128 | |
34 | ||
35 | #define RBD_COMP_NONE 0 | |
36 | #define RBD_CRYPT_NONE 0 | |
37 | ||
38 | #define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n" | |
39 | #define RBD_HEADER_SIGNATURE "RBD" | |
40 | #define RBD_HEADER_VERSION "001.005" | |
41 | ||
42 | struct rbd_info { | |
43 | uint64_t max_id; | |
44 | } __attribute__ ((packed)); | |
45 | ||
46 | struct rbd_obj_snap_ondisk { | |
47 | uint64_t id; | |
48 | uint64_t image_size; | |
49 | } __attribute__((packed)); | |
50 | ||
51 | struct rbd_obj_header_ondisk { | |
52 | char text[40]; | |
53 | char block_name[RBD_MAX_BLOCK_NAME_SIZE]; | |
54 | char signature[4]; | |
55 | char version[8]; | |
56 | struct { | |
57 | uint8_t order; | |
58 | uint8_t crypt_type; | |
59 | uint8_t comp_type; | |
60 | uint8_t unused; | |
61 | } __attribute__((packed)) options; | |
62 | uint64_t image_size; | |
63 | uint64_t snap_seq; | |
64 | uint32_t snap_count; | |
65 | uint32_t reserved; | |
66 | uint64_t snap_names_len; | |
67 | struct rbd_obj_snap_ondisk snaps[0]; | |
68 | } __attribute__((packed)); | |
69 | ||
70 | ||
71 | #endif |