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
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