Root/fs/ocfs2/ocfs1_fs_compat.h

1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * ocfs1_fs_compat.h
5 *
6 * OCFS1 volume header definitions. OCFS2 creates valid but unmountable
7 * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
8 * This allows an OCFS1 volume to see the partition and cleanly fail to
9 * mount it.
10 *
11 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public
15 * License, version 2, as published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public
23 * License along with this program; if not, write to the
24 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 * Boston, MA 021110-1307, USA.
26 */
27
28#ifndef _OCFS1_FS_COMPAT_H
29#define _OCFS1_FS_COMPAT_H
30
31#define OCFS1_MAX_VOL_SIGNATURE_LEN 128
32#define OCFS1_MAX_MOUNT_POINT_LEN 128
33#define OCFS1_MAX_VOL_ID_LENGTH 16
34#define OCFS1_MAX_VOL_LABEL_LEN 64
35#define OCFS1_MAX_CLUSTER_NAME_LEN 64
36
37#define OCFS1_MAJOR_VERSION (2)
38#define OCFS1_MINOR_VERSION (0)
39#define OCFS1_VOLUME_SIGNATURE "OracleCFS"
40
41/*
42 * OCFS1 superblock. Lives at sector 0.
43 */
44struct ocfs1_vol_disk_hdr
45{
46/*00*/ __u32 minor_version;
47    __u32 major_version;
48/*08*/ __u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
49/*88*/ __u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
50/*108*/ __u64 serial_num;
51/*110*/ __u64 device_size;
52    __u64 start_off;
53/*120*/ __u64 bitmap_off;
54    __u64 publ_off;
55/*130*/ __u64 vote_off;
56    __u64 root_bitmap_off;
57/*140*/ __u64 data_start_off;
58    __u64 root_bitmap_size;
59/*150*/ __u64 root_off;
60    __u64 root_size;
61/*160*/ __u64 cluster_size;
62    __u64 num_nodes;
63/*170*/ __u64 num_clusters;
64    __u64 dir_node_size;
65/*180*/ __u64 file_node_size;
66    __u64 internal_off;
67/*190*/ __u64 node_cfg_off;
68    __u64 node_cfg_size;
69/*1A0*/ __u64 new_cfg_off;
70    __u32 prot_bits;
71    __s32 excl_mount;
72/*1B0*/
73};
74
75
76struct ocfs1_disk_lock
77{
78/*00*/ __u32 curr_master;
79    __u8 file_lock;
80    __u8 compat_pad[3]; /* Not in original definition. Used to
81                make the already existing alignment
82                explicit */
83    __u64 last_write_time;
84/*10*/ __u64 last_read_time;
85    __u32 writer_node_num;
86    __u32 reader_node_num;
87/*20*/ __u64 oin_node_map;
88    __u64 dlock_seq_num;
89/*30*/
90};
91
92/*
93 * OCFS1 volume label. Lives at sector 1.
94 */
95struct ocfs1_vol_label
96{
97/*00*/ struct ocfs1_disk_lock disk_lock;
98/*30*/ __u8 label[OCFS1_MAX_VOL_LABEL_LEN];
99/*70*/ __u16 label_len;
100/*72*/ __u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
101/*82*/ __u16 vol_id_len;
102/*84*/ __u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
103/*A4*/ __u16 cluster_name_len;
104/*A6*/
105};
106
107
108#endif /* _OCFS1_FS_COMPAT_H */
109
110

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