1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 /* 1 /*
3 * Copyright (C) International Business Mach 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
>> 6 * the Free Software Foundation; either version 2 of the License, or
>> 7 * (at your option) any later version.
>> 8 *
>> 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
>> 15 * along with this program; if not, write to the Free Software
>> 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
4 */ 17 */
5 #ifndef _H_JFS_SUPERBLOCK 18 #ifndef _H_JFS_SUPERBLOCK
6 #define _H_JFS_SUPERBLOCK 19 #define _H_JFS_SUPERBLOCK
7 20
8 #include <linux/uuid.h> <<
9 <<
10 /* 21 /*
11 * make the magic number something a human cou 22 * make the magic number something a human could read
12 */ 23 */
13 #define JFS_MAGIC "JFS1" /* Magic word 24 #define JFS_MAGIC "JFS1" /* Magic word */
14 25
15 #define JFS_VERSION 2 /* Version num 26 #define JFS_VERSION 2 /* Version number: Version 2 */
16 27
17 #define LV_NAME_SIZE 11 /* MUST BE 11 28 #define LV_NAME_SIZE 11 /* MUST BE 11 for OS/2 boot sector */
18 29
19 /* 30 /*
20 * aggregate superblock 31 * aggregate superblock
21 * 32 *
22 * The name superblock is too close to super_b 33 * The name superblock is too close to super_block, so the name has been
23 * changed to jfs_superblock. The utilities a 34 * changed to jfs_superblock. The utilities are still using the old name.
24 */ 35 */
25 struct jfs_superblock { 36 struct jfs_superblock {
26 char s_magic[4]; /* 4: magic nu 37 char s_magic[4]; /* 4: magic number */
27 __le32 s_version; /* 4: version 38 __le32 s_version; /* 4: version number */
28 39
29 __le64 s_size; /* 8: aggregat 40 __le64 s_size; /* 8: aggregate size in hardware/LVM blocks;
30 * VFS: number 41 * VFS: number of blocks
31 */ 42 */
32 __le32 s_bsize; /* 4: aggregat 43 __le32 s_bsize; /* 4: aggregate block size in bytes;
33 * VFS: fragme 44 * VFS: fragment size
34 */ 45 */
35 __le16 s_l2bsize; /* 2: log2 of 46 __le16 s_l2bsize; /* 2: log2 of s_bsize */
36 __le16 s_l2bfactor; /* 2: log2(s_b 47 __le16 s_l2bfactor; /* 2: log2(s_bsize/hardware block size) */
37 __le32 s_pbsize; /* 4: hardware 48 __le32 s_pbsize; /* 4: hardware/LVM block size in bytes */
38 __le16 s_l2pbsize; /* 2: log2 of 49 __le16 s_l2pbsize; /* 2: log2 of s_pbsize */
39 __le16 pad; /* 2: padding 50 __le16 pad; /* 2: padding necessary for alignment */
40 51
41 __le32 s_agsize; /* 4: allocati 52 __le32 s_agsize; /* 4: allocation group size in aggr. blocks */
42 53
43 __le32 s_flag; /* 4: aggregat 54 __le32 s_flag; /* 4: aggregate attributes:
44 * see jfs_ 55 * see jfs_filsys.h
45 */ 56 */
46 __le32 s_state; /* 4: mount/un 57 __le32 s_state; /* 4: mount/unmount/recovery state:
47 * see jfs_ 58 * see jfs_filsys.h
48 */ 59 */
49 __le32 s_compress; /* 4: 60 __le32 s_compress; /* 4: > 0 if data compression */
50 61
51 pxd_t s_ait2; /* 8: first ex 62 pxd_t s_ait2; /* 8: first extent of secondary
52 * aggregat 63 * aggregate inode table
53 */ 64 */
54 65
55 pxd_t s_aim2; /* 8: first ex 66 pxd_t s_aim2; /* 8: first extent of secondary
56 * aggregat 67 * aggregate inode map
57 */ 68 */
58 __le32 s_logdev; /* 4: 69 __le32 s_logdev; /* 4: device address of log */
59 __le32 s_logserial; /* 4: log seri 70 __le32 s_logserial; /* 4: log serial number at aggregate mount */
60 pxd_t s_logpxd; /* 8: inline l 71 pxd_t s_logpxd; /* 8: inline log extent */
61 72
62 pxd_t s_fsckpxd; /* 8: inline f 73 pxd_t s_fsckpxd; /* 8: inline fsck work space extent */
63 74
64 struct timestruc_t s_time; /* 8: 75 struct timestruc_t s_time; /* 8: time last updated */
65 76
66 __le32 s_fsckloglen; /* 4: Number o 77 __le32 s_fsckloglen; /* 4: Number of filesystem blocks reserved for
67 * the fsck 78 * the fsck service log.
68 * N.B. The 79 * N.B. These blocks are divided among the
69 * ver 80 * versions kept. This is not a per
70 * ver 81 * version size.
71 * N.B. The 82 * N.B. These blocks are included in the
72 * len 83 * length field of s_fsckpxd.
73 */ 84 */
74 s8 s_fscklog; /* 1: which fs 85 s8 s_fscklog; /* 1: which fsck service log is most recent
75 * 0 => no 86 * 0 => no service log data yet
76 * 1 => the 87 * 1 => the first one
77 * 2 => the 88 * 2 => the 2nd one
78 */ 89 */
79 char s_fpack[11]; /* 11: file sy 90 char s_fpack[11]; /* 11: file system volume name
80 * N.B. Th 91 * N.B. This must be 11 bytes to
81 * co 92 * conform with the OS/2 BootSector
82 * re 93 * requirements
83 * On 94 * Only used when s_version is 1
84 */ 95 */
85 96
86 /* extendfs() parameter under s_state 97 /* extendfs() parameter under s_state & FM_EXTENDFS */
87 __le64 s_xsize; /* 8: extendfs 98 __le64 s_xsize; /* 8: extendfs s_size */
88 pxd_t s_xfsckpxd; /* 8: extendfs 99 pxd_t s_xfsckpxd; /* 8: extendfs fsckpxd */
89 pxd_t s_xlogpxd; /* 8: extendfs 100 pxd_t s_xlogpxd; /* 8: extendfs logpxd */
90 uuid_t s_uuid; /* 16: 128-bit !! 101 /* - 128 byte boundary - */
>> 102
>> 103 char s_uuid[16]; /* 16: 128-bit uuid for volume */
91 char s_label[16]; /* 16: volume 104 char s_label[16]; /* 16: volume label */
92 uuid_t s_loguuid; /* 16: 128-bit !! 105 char s_loguuid[16]; /* 16: 128-bit uuid for log device */
93 106
94 }; 107 };
95 108
96 extern int readSuper(struct super_block *, str 109 extern int readSuper(struct super_block *, struct buffer_head **);
97 extern int updateSuper(struct super_block *, u 110 extern int updateSuper(struct super_block *, uint);
98 __printf(2, 3) 111 __printf(2, 3)
99 extern void jfs_error(struct super_block *, co 112 extern void jfs_error(struct super_block *, const char *, ...);
100 extern int jfs_mount(struct super_block *); 113 extern int jfs_mount(struct super_block *);
101 extern int jfs_mount_rw(struct super_block *, 114 extern int jfs_mount_rw(struct super_block *, int);
102 extern int jfs_umount(struct super_block *); 115 extern int jfs_umount(struct super_block *);
103 extern int jfs_umount_rw(struct super_block *) 116 extern int jfs_umount_rw(struct super_block *);
104 extern int jfs_extendfs(struct super_block *, 117 extern int jfs_extendfs(struct super_block *, s64, int);
105 118
106 extern struct task_struct *jfsIOthread; 119 extern struct task_struct *jfsIOthread;
107 extern struct task_struct *jfsSyncThread; 120 extern struct task_struct *jfsSyncThread;
108 121
109 #endif /*_H_JFS_SUPERBLOCK */ 122 #endif /*_H_JFS_SUPERBLOCK */
110 123
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