1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * ocfs1_fs_compat.h
4 *
5 * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
6 * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
7 * This allows an OCFS1 volume to see the partition and cleanly fail to
8 * mount it.
9 *
10 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
11 */
12
13#ifndef _OCFS1_FS_COMPAT_H
14#define _OCFS1_FS_COMPAT_H
15
16#define OCFS1_MAX_VOL_SIGNATURE_LEN          128
17#define OCFS1_MAX_MOUNT_POINT_LEN            128
18#define OCFS1_MAX_VOL_ID_LENGTH               16
19#define OCFS1_MAX_VOL_LABEL_LEN               64
20#define OCFS1_MAX_CLUSTER_NAME_LEN            64
21
22#define OCFS1_MAJOR_VERSION              (2)
23#define OCFS1_MINOR_VERSION              (0)
24#define OCFS1_VOLUME_SIGNATURE		 "OracleCFS"
25
26/*
27 * OCFS1 superblock.  Lives at sector 0.
28 */
29struct ocfs1_vol_disk_hdr
30{
31/*00*/	__u32 minor_version;
32	__u32 major_version;
33/*08*/	__u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
34/*88*/	__u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
35/*108*/	__u64 serial_num;
36/*110*/	__u64 device_size;
37	__u64 start_off;
38/*120*/	__u64 bitmap_off;
39	__u64 publ_off;
40/*130*/	__u64 vote_off;
41	__u64 root_bitmap_off;
42/*140*/	__u64 data_start_off;
43	__u64 root_bitmap_size;
44/*150*/	__u64 root_off;
45	__u64 root_size;
46/*160*/	__u64 cluster_size;
47	__u64 num_nodes;
48/*170*/	__u64 num_clusters;
49	__u64 dir_node_size;
50/*180*/	__u64 file_node_size;
51	__u64 internal_off;
52/*190*/	__u64 node_cfg_off;
53	__u64 node_cfg_size;
54/*1A0*/	__u64 new_cfg_off;
55	__u32 prot_bits;
56	__s32 excl_mount;
57/*1B0*/
58};
59
60
61struct ocfs1_disk_lock
62{
63/*00*/	__u32 curr_master;
64	__u8 file_lock;
65	__u8 compat_pad[3];  /* Not in original definition.  Used to
66				make the already existing alignment
67				explicit */
68	__u64 last_write_time;
69/*10*/	__u64 last_read_time;
70	__u32 writer_node_num;
71	__u32 reader_node_num;
72/*20*/	__u64 oin_node_map;
73	__u64 dlock_seq_num;
74/*30*/
75};
76
77/*
78 * OCFS1 volume label.  Lives at sector 1.
79 */
80struct ocfs1_vol_label
81{
82/*00*/	struct ocfs1_disk_lock disk_lock;
83/*30*/	__u8 label[OCFS1_MAX_VOL_LABEL_LEN];
84/*70*/	__u16 label_len;
85/*72*/	__u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
86/*82*/	__u16 vol_id_len;
87/*84*/	__u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
88/*A4*/	__u16 cluster_name_len;
89/*A6*/
90};
91
92
93#endif /* _OCFS1_FS_COMPAT_H */
94
95