Root/
| 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 | /* |
| 22 | * make the magic number something a human could read |
| 23 | */ |
| 24 | #define JFS_MAGIC "JFS1" /* Magic word */ |
| 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 | |
| 30 | /* |
| 31 | * aggregate superblock |
| 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 | */ |
| 43 | __le32 s_bsize; /* 4: aggregate block size in bytes; |
| 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 | */ |
| 57 | __le32 s_state; /* 4: mount/unmount/recovery state: |
| 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 |
| 78 | * the fsck service log. |
| 79 | * N.B. These blocks are divided among the |
| 80 | * versions kept. This is not a per |
| 81 | * version size. |
| 82 | * N.B. These blocks are included in the |
| 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 | */ |
| 90 | char s_fpack[11]; /* 11: file system volume name |
| 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 *, ...); |
| 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 *); |
| 116 | extern int jfs_extendfs(struct super_block *, s64, int); |
| 117 | |
| 118 | extern struct task_struct *jfsIOthread; |
| 119 | extern struct task_struct *jfsSyncThread; |
| 120 | |
| 121 | #endif /*_H_JFS_SUPERBLOCK */ |
| 122 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9
