1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1
2 /*
3 * Copyright (C) International Business Mach
4 */
5 #ifndef _H_JFS_SUPERBLOCK
6 #define _H_JFS_SUPERBLOCK
7
8 #include <linux/uuid.h>
9
10 /*
11 * make the magic number something a human cou
12 */
13 #define JFS_MAGIC "JFS1" /* Magic word
14
15 #define JFS_VERSION 2 /* Version num
16
17 #define LV_NAME_SIZE 11 /* MUST BE 11
18
19 /*
20 * aggregate superblock
21 *
22 * The name superblock is too close to super_b
23 * changed to jfs_superblock. The utilities a
24 */
25 struct jfs_superblock {
26 char s_magic[4]; /* 4: magic nu
27 __le32 s_version; /* 4: version
28
29 __le64 s_size; /* 8: aggregat
30 * VFS: number
31 */
32 __le32 s_bsize; /* 4: aggregat
33 * VFS: fragme
34 */
35 __le16 s_l2bsize; /* 2: log2 of
36 __le16 s_l2bfactor; /* 2: log2(s_b
37 __le32 s_pbsize; /* 4: hardware
38 __le16 s_l2pbsize; /* 2: log2 of
39 __le16 pad; /* 2: padding
40
41 __le32 s_agsize; /* 4: allocati
42
43 __le32 s_flag; /* 4: aggregat
44 * see jfs_
45 */
46 __le32 s_state; /* 4: mount/un
47 * see jfs_
48 */
49 __le32 s_compress; /* 4:
50
51 pxd_t s_ait2; /* 8: first ex
52 * aggregat
53 */
54
55 pxd_t s_aim2; /* 8: first ex
56 * aggregat
57 */
58 __le32 s_logdev; /* 4:
59 __le32 s_logserial; /* 4: log seri
60 pxd_t s_logpxd; /* 8: inline l
61
62 pxd_t s_fsckpxd; /* 8: inline f
63
64 struct timestruc_t s_time; /* 8:
65
66 __le32 s_fsckloglen; /* 4: Number o
67 * the fsck
68 * N.B. The
69 * ver
70 * ver
71 * N.B. The
72 * len
73 */
74 s8 s_fscklog; /* 1: which fs
75 * 0 => no
76 * 1 => the
77 * 2 => the
78 */
79 char s_fpack[11]; /* 11: file sy
80 * N.B. Th
81 * co
82 * re
83 * On
84 */
85
86 /* extendfs() parameter under s_state
87 __le64 s_xsize; /* 8: extendfs
88 pxd_t s_xfsckpxd; /* 8: extendfs
89 pxd_t s_xlogpxd; /* 8: extendfs
90 uuid_t s_uuid; /* 16: 128-bit
91 char s_label[16]; /* 16: volume
92 uuid_t s_loguuid; /* 16: 128-bit
93
94 };
95
96 extern int readSuper(struct super_block *, str
97 extern int updateSuper(struct super_block *, u
98 __printf(2, 3)
99 extern void jfs_error(struct super_block *, co
100 extern int jfs_mount(struct super_block *);
101 extern int jfs_mount_rw(struct super_block *,
102 extern int jfs_umount(struct super_block *);
103 extern int jfs_umount_rw(struct super_block *)
104 extern int jfs_extendfs(struct super_block *,
105
106 extern struct task_struct *jfsIOthread;
107 extern struct task_struct *jfsSyncThread;
108
109 #endif /*_H_JFS_SUPERBLOCK */
110
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