Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) International Business Machines Corp., 2000-2003 | |
1da177e4 LT |
4 | */ |
5 | #ifndef _H_JFS_SUPERBLOCK | |
6 | #define _H_JFS_SUPERBLOCK | |
7 | ||
2e3bc612 AS |
8 | #include <linux/uuid.h> |
9 | ||
1da177e4 LT |
10 | /* |
11 | * make the magic number something a human could read | |
12 | */ | |
63f83c9f | 13 | #define JFS_MAGIC "JFS1" /* Magic word */ |
1da177e4 LT |
14 | |
15 | #define JFS_VERSION 2 /* Version number: Version 2 */ | |
16 | ||
17 | #define LV_NAME_SIZE 11 /* MUST BE 11 for OS/2 boot sector */ | |
18 | ||
63f83c9f DK |
19 | /* |
20 | * aggregate superblock | |
1da177e4 LT |
21 | * |
22 | * The name superblock is too close to super_block, so the name has been | |
23 | * changed to jfs_superblock. The utilities are still using the old name. | |
24 | */ | |
25 | struct jfs_superblock { | |
26 | char s_magic[4]; /* 4: magic number */ | |
27 | __le32 s_version; /* 4: version number */ | |
28 | ||
29 | __le64 s_size; /* 8: aggregate size in hardware/LVM blocks; | |
30 | * VFS: number of blocks | |
31 | */ | |
63f83c9f | 32 | __le32 s_bsize; /* 4: aggregate block size in bytes; |
1da177e4 LT |
33 | * VFS: fragment size |
34 | */ | |
35 | __le16 s_l2bsize; /* 2: log2 of s_bsize */ | |
36 | __le16 s_l2bfactor; /* 2: log2(s_bsize/hardware block size) */ | |
37 | __le32 s_pbsize; /* 4: hardware/LVM block size in bytes */ | |
38 | __le16 s_l2pbsize; /* 2: log2 of s_pbsize */ | |
39 | __le16 pad; /* 2: padding necessary for alignment */ | |
40 | ||
41 | __le32 s_agsize; /* 4: allocation group size in aggr. blocks */ | |
42 | ||
43 | __le32 s_flag; /* 4: aggregate attributes: | |
44 | * see jfs_filsys.h | |
45 | */ | |
63f83c9f | 46 | __le32 s_state; /* 4: mount/unmount/recovery state: |
1da177e4 LT |
47 | * see jfs_filsys.h |
48 | */ | |
49 | __le32 s_compress; /* 4: > 0 if data compression */ | |
50 | ||
51 | pxd_t s_ait2; /* 8: first extent of secondary | |
52 | * aggregate inode table | |
53 | */ | |
54 | ||
55 | pxd_t s_aim2; /* 8: first extent of secondary | |
56 | * aggregate inode map | |
57 | */ | |
58 | __le32 s_logdev; /* 4: device address of log */ | |
59 | __le32 s_logserial; /* 4: log serial number at aggregate mount */ | |
60 | pxd_t s_logpxd; /* 8: inline log extent */ | |
61 | ||
62 | pxd_t s_fsckpxd; /* 8: inline fsck work space extent */ | |
63 | ||
64 | struct timestruc_t s_time; /* 8: time last updated */ | |
65 | ||
66 | __le32 s_fsckloglen; /* 4: Number of filesystem blocks reserved for | |
63f83c9f | 67 | * the fsck service log. |
1da177e4 LT |
68 | * N.B. These blocks are divided among the |
69 | * versions kept. This is not a per | |
70 | * version size. | |
63f83c9f | 71 | * N.B. These blocks are included in the |
1da177e4 LT |
72 | * length field of s_fsckpxd. |
73 | */ | |
74 | s8 s_fscklog; /* 1: which fsck service log is most recent | |
75 | * 0 => no service log data yet | |
76 | * 1 => the first one | |
77 | * 2 => the 2nd one | |
78 | */ | |
63f83c9f | 79 | char s_fpack[11]; /* 11: file system volume name |
1da177e4 LT |
80 | * N.B. This must be 11 bytes to |
81 | * conform with the OS/2 BootSector | |
82 | * requirements | |
83 | * Only used when s_version is 1 | |
84 | */ | |
85 | ||
86 | /* extendfs() parameter under s_state & FM_EXTENDFS */ | |
87 | __le64 s_xsize; /* 8: extendfs s_size */ | |
88 | pxd_t s_xfsckpxd; /* 8: extendfs fsckpxd */ | |
89 | pxd_t s_xlogpxd; /* 8: extendfs logpxd */ | |
2e3bc612 | 90 | uuid_t s_uuid; /* 16: 128-bit uuid for volume */ |
1da177e4 | 91 | char s_label[16]; /* 16: volume label */ |
2e3bc612 | 92 | uuid_t s_loguuid; /* 16: 128-bit uuid for log device */ |
1da177e4 LT |
93 | |
94 | }; | |
95 | ||
96 | extern int readSuper(struct super_block *, struct buffer_head **); | |
97 | extern int updateSuper(struct super_block *, uint); | |
eb8630d7 | 98 | __printf(2, 3) |
1da177e4 | 99 | extern void jfs_error(struct super_block *, const char *, ...); |
1868f4aa DK |
100 | extern int jfs_mount(struct super_block *); |
101 | extern int jfs_mount_rw(struct super_block *, int); | |
102 | extern int jfs_umount(struct super_block *); | |
103 | extern int jfs_umount_rw(struct super_block *); | |
1868f4aa | 104 | extern int jfs_extendfs(struct super_block *, s64, int); |
1da177e4 | 105 | |
91dbb4de CH |
106 | extern struct task_struct *jfsIOthread; |
107 | extern struct task_struct *jfsSyncThread; | |
108 | ||
1da177e4 | 109 | #endif /*_H_JFS_SUPERBLOCK */ |