Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Copyright (C) International Business Machines Corp., 2000-2003 | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
63f83c9f | 6 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 7 | * (at your option) any later version. |
63f83c9f | 8 | * |
1da177e4 LT |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
12 | * the GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
63f83c9f | 15 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | */ | |
18 | #ifndef _H_JFS_SUPERBLOCK | |
19 | #define _H_JFS_SUPERBLOCK | |
20 | ||
21 | /* | |
22 | * make the magic number something a human could read | |
23 | */ | |
63f83c9f | 24 | #define JFS_MAGIC "JFS1" /* Magic word */ |
1da177e4 LT |
25 | |
26 | #define JFS_VERSION 2 /* Version number: Version 2 */ | |
27 | ||
28 | #define LV_NAME_SIZE 11 /* MUST BE 11 for OS/2 boot sector */ | |
29 | ||
63f83c9f DK |
30 | /* |
31 | * aggregate superblock | |
1da177e4 LT |
32 | * |
33 | * The name superblock is too close to super_block, so the name has been | |
34 | * changed to jfs_superblock. The utilities are still using the old name. | |
35 | */ | |
36 | struct jfs_superblock { | |
37 | char s_magic[4]; /* 4: magic number */ | |
38 | __le32 s_version; /* 4: version number */ | |
39 | ||
40 | __le64 s_size; /* 8: aggregate size in hardware/LVM blocks; | |
41 | * VFS: number of blocks | |
42 | */ | |
63f83c9f | 43 | __le32 s_bsize; /* 4: aggregate block size in bytes; |
1da177e4 LT |
44 | * VFS: fragment size |
45 | */ | |
46 | __le16 s_l2bsize; /* 2: log2 of s_bsize */ | |
47 | __le16 s_l2bfactor; /* 2: log2(s_bsize/hardware block size) */ | |
48 | __le32 s_pbsize; /* 4: hardware/LVM block size in bytes */ | |
49 | __le16 s_l2pbsize; /* 2: log2 of s_pbsize */ | |
50 | __le16 pad; /* 2: padding necessary for alignment */ | |
51 | ||
52 | __le32 s_agsize; /* 4: allocation group size in aggr. blocks */ | |
53 | ||
54 | __le32 s_flag; /* 4: aggregate attributes: | |
55 | * see jfs_filsys.h | |
56 | */ | |
63f83c9f | 57 | __le32 s_state; /* 4: mount/unmount/recovery state: |
1da177e4 LT |
58 | * see jfs_filsys.h |
59 | */ | |
60 | __le32 s_compress; /* 4: > 0 if data compression */ | |
61 | ||
62 | pxd_t s_ait2; /* 8: first extent of secondary | |
63 | * aggregate inode table | |
64 | */ | |
65 | ||
66 | pxd_t s_aim2; /* 8: first extent of secondary | |
67 | * aggregate inode map | |
68 | */ | |
69 | __le32 s_logdev; /* 4: device address of log */ | |
70 | __le32 s_logserial; /* 4: log serial number at aggregate mount */ | |
71 | pxd_t s_logpxd; /* 8: inline log extent */ | |
72 | ||
73 | pxd_t s_fsckpxd; /* 8: inline fsck work space extent */ | |
74 | ||
75 | struct timestruc_t s_time; /* 8: time last updated */ | |
76 | ||
77 | __le32 s_fsckloglen; /* 4: Number of filesystem blocks reserved for | |
63f83c9f | 78 | * the fsck service log. |
1da177e4 LT |
79 | * N.B. These blocks are divided among the |
80 | * versions kept. This is not a per | |
81 | * version size. | |
63f83c9f | 82 | * N.B. These blocks are included in the |
1da177e4 LT |
83 | * length field of s_fsckpxd. |
84 | */ | |
85 | s8 s_fscklog; /* 1: which fsck service log is most recent | |
86 | * 0 => no service log data yet | |
87 | * 1 => the first one | |
88 | * 2 => the 2nd one | |
89 | */ | |
63f83c9f | 90 | char s_fpack[11]; /* 11: file system volume name |
1da177e4 LT |
91 | * N.B. This must be 11 bytes to |
92 | * conform with the OS/2 BootSector | |
93 | * requirements | |
94 | * Only used when s_version is 1 | |
95 | */ | |
96 | ||
97 | /* extendfs() parameter under s_state & FM_EXTENDFS */ | |
98 | __le64 s_xsize; /* 8: extendfs s_size */ | |
99 | pxd_t s_xfsckpxd; /* 8: extendfs fsckpxd */ | |
100 | pxd_t s_xlogpxd; /* 8: extendfs logpxd */ | |
101 | /* - 128 byte boundary - */ | |
102 | ||
103 | char s_uuid[16]; /* 16: 128-bit uuid for volume */ | |
104 | char s_label[16]; /* 16: volume label */ | |
105 | char s_loguuid[16]; /* 16: 128-bit uuid for log device */ | |
106 | ||
107 | }; | |
108 | ||
109 | extern int readSuper(struct super_block *, struct buffer_head **); | |
110 | extern int updateSuper(struct super_block *, uint); | |
111 | extern void jfs_error(struct super_block *, const char *, ...); | |
1868f4aa DK |
112 | extern int jfs_mount(struct super_block *); |
113 | extern int jfs_mount_rw(struct super_block *, int); | |
114 | extern int jfs_umount(struct super_block *); | |
115 | extern int jfs_umount_rw(struct super_block *); | |
1868f4aa | 116 | extern int jfs_extendfs(struct super_block *, s64, int); |
1da177e4 | 117 | |
91dbb4de CH |
118 | extern struct task_struct *jfsIOthread; |
119 | extern struct task_struct *jfsSyncThread; | |
120 | ||
1da177e4 | 121 | #endif /*_H_JFS_SUPERBLOCK */ |