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  */
44 struct 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 
76 struct 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  */
95 struct 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