1/* SPDX-License-Identifier: GPL-2.0-only */
2/* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * ocfs1_fs_compat.h
6 *
7 * OCFS1 volume header definitions.  OCFS2 creates valid but unmountable
8 * OCFS1 volume headers on the first two sectors of an OCFS2 volume.
9 * This allows an OCFS1 volume to see the partition and cleanly fail to
10 * mount it.
11 *
12 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
13 */
14
15#ifndef _OCFS1_FS_COMPAT_H
16#define _OCFS1_FS_COMPAT_H
17
18#define OCFS1_MAX_VOL_SIGNATURE_LEN          128
19#define OCFS1_MAX_MOUNT_POINT_LEN            128
20#define OCFS1_MAX_VOL_ID_LENGTH               16
21#define OCFS1_MAX_VOL_LABEL_LEN               64
22#define OCFS1_MAX_CLUSTER_NAME_LEN            64
23
24#define OCFS1_MAJOR_VERSION              (2)
25#define OCFS1_MINOR_VERSION              (0)
26#define OCFS1_VOLUME_SIGNATURE		 "OracleCFS"
27
28/*
29 * OCFS1 superblock.  Lives at sector 0.
30 */
31struct ocfs1_vol_disk_hdr
32{
33/*00*/	__u32 minor_version;
34	__u32 major_version;
35/*08*/	__u8 signature[OCFS1_MAX_VOL_SIGNATURE_LEN];
36/*88*/	__u8 mount_point[OCFS1_MAX_MOUNT_POINT_LEN];
37/*108*/	__u64 serial_num;
38/*110*/	__u64 device_size;
39	__u64 start_off;
40/*120*/	__u64 bitmap_off;
41	__u64 publ_off;
42/*130*/	__u64 vote_off;
43	__u64 root_bitmap_off;
44/*140*/	__u64 data_start_off;
45	__u64 root_bitmap_size;
46/*150*/	__u64 root_off;
47	__u64 root_size;
48/*160*/	__u64 cluster_size;
49	__u64 num_nodes;
50/*170*/	__u64 num_clusters;
51	__u64 dir_node_size;
52/*180*/	__u64 file_node_size;
53	__u64 internal_off;
54/*190*/	__u64 node_cfg_off;
55	__u64 node_cfg_size;
56/*1A0*/	__u64 new_cfg_off;
57	__u32 prot_bits;
58	__s32 excl_mount;
59/*1B0*/
60};
61
62
63struct ocfs1_disk_lock
64{
65/*00*/	__u32 curr_master;
66	__u8 file_lock;
67	__u8 compat_pad[3];  /* Not in original definition.  Used to
68				make the already existing alignment
69				explicit */
70	__u64 last_write_time;
71/*10*/	__u64 last_read_time;
72	__u32 writer_node_num;
73	__u32 reader_node_num;
74/*20*/	__u64 oin_node_map;
75	__u64 dlock_seq_num;
76/*30*/
77};
78
79/*
80 * OCFS1 volume label.  Lives at sector 1.
81 */
82struct ocfs1_vol_label
83{
84/*00*/	struct ocfs1_disk_lock disk_lock;
85/*30*/	__u8 label[OCFS1_MAX_VOL_LABEL_LEN];
86/*70*/	__u16 label_len;
87/*72*/	__u8 vol_id[OCFS1_MAX_VOL_ID_LENGTH];
88/*82*/	__u16 vol_id_len;
89/*84*/	__u8 cluster_name[OCFS1_MAX_CLUSTER_NAME_LEN];
90/*A4*/	__u16 cluster_name_len;
91/*A6*/
92};
93
94
95#endif /* _OCFS1_FS_COMPAT_H */
96
97