Contents of /trunk/mkinitrd-magellan/klibc/usr/kinit/fstype/jfs_superblock.h
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
File MIME type: text/plain
File size: 3762 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 |
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 |
17 | */ |
18 | #ifndef _H_JFS_SUPERBLOCK |
19 | #define _H_JFS_SUPERBLOCK |
20 | |
21 | struct timestruc_t { |
22 | __le32 tv_sec; |
23 | __le32 tv_nsec; |
24 | }; |
25 | |
26 | /* |
27 | * make the magic number something a human could read |
28 | */ |
29 | #define JFS_MAGIC "JFS1" /* Magic word */ |
30 | |
31 | #define JFS_VERSION 2 /* Version number: Version 2 */ |
32 | |
33 | #define LV_NAME_SIZE 11 /* MUST BE 11 for OS/2 boot sector */ |
34 | |
35 | /* |
36 | * aggregate superblock |
37 | * |
38 | * The name superblock is too close to super_block, so the name has been |
39 | * changed to jfs_superblock. The utilities are still using the old name. |
40 | */ |
41 | struct jfs_superblock { |
42 | char s_magic[4]; /* 4: magic number */ |
43 | __le32 s_version; /* 4: version number */ |
44 | |
45 | __le64 s_size; /* 8: aggregate size in hardware/LVM blocks; |
46 | * VFS: number of blocks |
47 | */ |
48 | __le32 s_bsize; /* 4: aggregate block size in bytes; |
49 | * VFS: fragment size |
50 | */ |
51 | __le16 s_l2bsize; /* 2: log2 of s_bsize */ |
52 | __le16 s_l2bfactor; /* 2: log2(s_bsize/hardware block size) */ |
53 | __le32 s_pbsize; /* 4: hardware/LVM block size in bytes */ |
54 | __le16 s_l2pbsize; /* 2: log2 of s_pbsize */ |
55 | __le16 pad; /* 2: padding necessary for alignment */ |
56 | |
57 | __le32 s_agsize; /* 4: allocation group size in aggr. blocks */ |
58 | |
59 | __le32 s_flag; /* 4: aggregate attributes: |
60 | * see jfs_filsys.h |
61 | */ |
62 | __le32 s_state; /* 4: mount/unmount/recovery state: |
63 | * see jfs_filsys.h |
64 | */ |
65 | __le32 s_compress; /* 4: > 0 if data compression */ |
66 | |
67 | __le64 s_ait2; /* 8: first extent of secondary |
68 | * aggregate inode table |
69 | */ |
70 | |
71 | __le64 s_aim2; /* 8: first extent of secondary |
72 | * aggregate inode map |
73 | */ |
74 | __le32 s_logdev; /* 4: device address of log */ |
75 | __le32 s_logserial; /* 4: log serial number at aggregate mount */ |
76 | __le64 s_logpxd; /* 8: inline log extent */ |
77 | |
78 | __le64 s_fsckpxd; /* 8: inline fsck work space extent */ |
79 | |
80 | struct timestruc_t s_time; /* 8: time last updated */ |
81 | |
82 | __le32 s_fsckloglen; /* 4: Number of filesystem blocks reserved for |
83 | * the fsck service log. |
84 | * N.B. These blocks are divided among the |
85 | * versions kept. This is not a per |
86 | * version size. |
87 | * N.B. These blocks are included in the |
88 | * length field of s_fsckpxd. |
89 | */ |
90 | char s_fscklog; /* 1: which fsck service log is most recent |
91 | * 0 => no service log data yet |
92 | * 1 => the first one |
93 | * 2 => the 2nd one |
94 | */ |
95 | char s_fpack[11]; /* 11: file system volume name |
96 | * N.B. This must be 11 bytes to |
97 | * conform with the OS/2 BootSector |
98 | * requirements |
99 | * Only used when s_version is 1 |
100 | */ |
101 | |
102 | /* extendfs() parameter under s_state & FM_EXTENDFS */ |
103 | __le64 s_xsize; /* 8: extendfs s_size */ |
104 | __le64 s_xfsckpxd; /* 8: extendfs fsckpxd */ |
105 | __le64 s_xlogpxd; /* 8: extendfs logpxd */ |
106 | /* - 128 byte boundary - */ |
107 | |
108 | char s_uuid[16]; /* 16: 128-bit uuid for volume */ |
109 | char s_label[16]; /* 16: volume label */ |
110 | char s_loguuid[16]; /* 16: 128-bit uuid for log device */ |
111 | |
112 | }; |
113 | |
114 | #endif /*_H_JFS_SUPERBLOCK */ |