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602adf40 YS |
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. | |
10 | * | |
11 | */ | |
12 | ||
13 | #ifndef CEPH_RBD_TYPES_H | |
14 | #define CEPH_RBD_TYPES_H | |
15 | ||
16 | #include <linux/types.h> | |
17 | ||
3bb59ad5 AE |
18 | /* For format version 2, rbd image 'foo' consists of objects |
19 | * rbd_id.foo - id of image | |
20 | * rbd_header.<id> - image metadata | |
21 | * rbd_data.<id>.0000000000000000 | |
22 | * rbd_data.<id>.0000000000000001 | |
23 | * ... - data | |
24 | * Clients do not access header data directly in rbd format 2. | |
25 | */ | |
26 | ||
27 | #define RBD_HEADER_PREFIX "rbd_header." | |
28 | #define RBD_DATA_PREFIX "rbd_data." | |
29 | #define RBD_ID_PREFIX "rbd_id." | |
30 | ||
602adf40 | 31 | /* |
3bb59ad5 AE |
32 | * For format version 1, rbd image 'foo' consists of objects |
33 | * foo.rbd - image metadata | |
34 | * rb.<idhi>.<idlo>.00000000 | |
35 | * rb.<idhi>.<idlo>.00000001 | |
36 | * ... - data | |
37 | * There is no notion of a persistent image id in rbd format 1. | |
602adf40 YS |
38 | */ |
39 | ||
40 | #define RBD_SUFFIX ".rbd" | |
3bb59ad5 | 41 | |
602adf40 YS |
42 | #define RBD_DIRECTORY "rbd_directory" |
43 | #define RBD_INFO "rbd_info" | |
44 | ||
45 | #define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */ | |
46 | #define RBD_MIN_OBJ_ORDER 16 | |
47 | #define RBD_MAX_OBJ_ORDER 30 | |
48 | ||
602adf40 YS |
49 | #define RBD_COMP_NONE 0 |
50 | #define RBD_CRYPT_NONE 0 | |
51 | ||
52 | #define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n" | |
53 | #define RBD_HEADER_SIGNATURE "RBD" | |
54 | #define RBD_HEADER_VERSION "001.005" | |
55 | ||
602adf40 YS |
56 | struct rbd_image_snap_ondisk { |
57 | __le64 id; | |
58 | __le64 image_size; | |
59 | } __attribute__((packed)); | |
60 | ||
61 | struct rbd_image_header_ondisk { | |
62 | char text[40]; | |
843a0d08 | 63 | char object_prefix[24]; |
602adf40 YS |
64 | char signature[4]; |
65 | char version[8]; | |
66 | struct { | |
67 | __u8 order; | |
68 | __u8 crypt_type; | |
69 | __u8 comp_type; | |
70 | __u8 unused; | |
71 | } __attribute__((packed)) options; | |
72 | __le64 image_size; | |
73 | __le64 snap_seq; | |
74 | __le32 snap_count; | |
75 | __le32 reserved; | |
76 | __le64 snap_names_len; | |
77 | struct rbd_image_snap_ondisk snaps[0]; | |
78 | } __attribute__((packed)); | |
79 | ||
80 | ||
81 | #endif |