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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.
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_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
31/*
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.
38 */
39
40#define RBD_SUFFIX ".rbd"
41
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
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
56struct rbd_image_snap_ondisk {
57 __le64 id;
58 __le64 image_size;
59} __attribute__((packed));
60
61struct rbd_image_header_ondisk {
62 char text[40];
63 char object_prefix[24];
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
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_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
31#define RBD_LOCK_NAME "rbd_lock"
32#define RBD_LOCK_TAG "internal"
33#define RBD_LOCK_COOKIE_PREFIX "auto"
34
35enum rbd_notify_op {
36 RBD_NOTIFY_OP_ACQUIRED_LOCK = 0,
37 RBD_NOTIFY_OP_RELEASED_LOCK = 1,
38 RBD_NOTIFY_OP_REQUEST_LOCK = 2,
39 RBD_NOTIFY_OP_HEADER_UPDATE = 3,
40};
41
42/*
43 * For format version 1, rbd image 'foo' consists of objects
44 * foo.rbd - image metadata
45 * rb.<idhi>.<idlo>.00000000
46 * rb.<idhi>.<idlo>.00000001
47 * ... - data
48 * There is no notion of a persistent image id in rbd format 1.
49 */
50
51#define RBD_SUFFIX ".rbd"
52
53#define RBD_DIRECTORY "rbd_directory"
54#define RBD_INFO "rbd_info"
55
56#define RBD_DEFAULT_OBJ_ORDER 22 /* 4MB */
57#define RBD_MIN_OBJ_ORDER 16
58#define RBD_MAX_OBJ_ORDER 30
59
60#define RBD_COMP_NONE 0
61#define RBD_CRYPT_NONE 0
62
63#define RBD_HEADER_TEXT "<<< Rados Block Device Image >>>\n"
64#define RBD_HEADER_SIGNATURE "RBD"
65#define RBD_HEADER_VERSION "001.005"
66
67struct rbd_image_snap_ondisk {
68 __le64 id;
69 __le64 image_size;
70} __attribute__((packed));
71
72struct rbd_image_header_ondisk {
73 char text[40];
74 char object_prefix[24];
75 char signature[4];
76 char version[8];
77 struct {
78 __u8 order;
79 __u8 crypt_type;
80 __u8 comp_type;
81 __u8 unused;
82 } __attribute__((packed)) options;
83 __le64 image_size;
84 __le64 snap_seq;
85 __le32 snap_count;
86 __le32 reserved;
87 __le64 snap_names_len;
88 struct rbd_image_snap_ondisk snaps[0];
89} __attribute__((packed));
90
91
92#endif