xref: /linux/fs/ocfs2/ocfs1_fs_compat.h (revision 8be98d2f2a0a262f8bf8a0bc1fdf522b3c7aab17)
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  */
29 struct 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 
61 struct 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  */
80 struct 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