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 | |
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_object_map.<id> - optional image object map |
22 | * rbd_data.<id>.0000000000000000 |
23 | * rbd_data.<id>.0000000000000001 |
24 | * ... - data |
25 | * Clients do not access header data directly in rbd format 2. |
26 | */ |
27 | |
28 | #define "rbd_header." |
29 | #define RBD_OBJECT_MAP_PREFIX "rbd_object_map." |
30 | #define RBD_ID_PREFIX "rbd_id." |
31 | #define RBD_V2_DATA_FORMAT "%s.%016llx" |
32 | |
33 | #define RBD_LOCK_NAME "rbd_lock" |
34 | #define RBD_LOCK_TAG "internal" |
35 | #define RBD_LOCK_COOKIE_PREFIX "auto" |
36 | |
37 | enum rbd_notify_op { |
38 | RBD_NOTIFY_OP_ACQUIRED_LOCK = 0, |
39 | RBD_NOTIFY_OP_RELEASED_LOCK = 1, |
40 | RBD_NOTIFY_OP_REQUEST_LOCK = 2, |
41 | = 3, |
42 | }; |
43 | |
44 | #define OBJECT_NONEXISTENT 0 |
45 | #define OBJECT_EXISTS 1 |
46 | #define OBJECT_PENDING 2 |
47 | #define OBJECT_EXISTS_CLEAN 3 |
48 | |
49 | #define RBD_FLAG_OBJECT_MAP_INVALID (1ULL << 0) |
50 | #define RBD_FLAG_FAST_DIFF_INVALID (1ULL << 1) |
51 | |
52 | /* |
53 | * For format version 1, rbd image 'foo' consists of objects |
54 | * foo.rbd - image metadata |
55 | * rb.<idhi>.<idlo>.<extra>.000000000000 |
56 | * rb.<idhi>.<idlo>.<extra>.000000000001 |
57 | * ... - data |
58 | * There is no notion of a persistent image id in rbd format 1. |
59 | */ |
60 | |
61 | #define RBD_SUFFIX ".rbd" |
62 | #define RBD_V1_DATA_FORMAT "%s.%012llx" |
63 | |
64 | #define RBD_DIRECTORY "rbd_directory" |
65 | #define RBD_INFO "rbd_info" |
66 | |
67 | #define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */ |
68 | #define RBD_MIN_OBJ_ORDER 16 |
69 | #define RBD_MAX_OBJ_ORDER 30 |
70 | |
71 | #define "<<< Rados Block Device Image >>>\n" |
72 | #define "RBD" |
73 | #define "001.005" |
74 | |
75 | struct rbd_image_snap_ondisk { |
76 | __le64 id; |
77 | __le64 image_size; |
78 | } __attribute__((packed)); |
79 | |
80 | struct { |
81 | char [40]; |
82 | char [24]; |
83 | char [4]; |
84 | char [8]; |
85 | struct { |
86 | __u8 ; |
87 | __u8 ; |
88 | __u8 ; |
89 | __u8 ; |
90 | } __attribute__((packed)) ; |
91 | __le64 ; |
92 | __le64 ; |
93 | __le32 ; |
94 | __le32 ; |
95 | __le64 ; |
96 | struct rbd_image_snap_ondisk []; |
97 | } __attribute__((packed)); |
98 | |
99 | |
100 | #endif |
101 | |