projects / mirror_ubuntu-jammy-kernel.git / blame
| 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 */ |