mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/*
|
|
* Copyright (C) International Business Machines Corp., 2000-2003
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
|
|
* the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#ifndef _H_JFS_SUPERBLOCK
|
|
#define _H_JFS_SUPERBLOCK
|
|
|
|
/*
|
|
* make the magic number something a human could read
|
|
*/
|
|
#define JFS_MAGIC "JFS1" /* Magic word */
|
|
|
|
#define JFS_VERSION 2 /* Version number: Version 2 */
|
|
|
|
#define LV_NAME_SIZE 11 /* MUST BE 11 for OS/2 boot sector */
|
|
|
|
/*
|
|
* aggregate superblock
|
|
*
|
|
* The name superblock is too close to super_block, so the name has been
|
|
* changed to jfs_superblock. The utilities are still using the old name.
|
|
*/
|
|
struct jfs_superblock {
|
|
char s_magic[4]; /* 4: magic number */
|
|
__le32 s_version; /* 4: version number */
|
|
|
|
__le64 s_size; /* 8: aggregate size in hardware/LVM blocks;
|
|
* VFS: number of blocks
|
|
*/
|
|
__le32 s_bsize; /* 4: aggregate block size in bytes;
|
|
* VFS: fragment size
|
|
*/
|
|
__le16 s_l2bsize; /* 2: log2 of s_bsize */
|
|
__le16 s_l2bfactor; /* 2: log2(s_bsize/hardware block size) */
|
|
__le32 s_pbsize; /* 4: hardware/LVM block size in bytes */
|
|
__le16 s_l2pbsize; /* 2: log2 of s_pbsize */
|
|
__le16 pad; /* 2: padding necessary for alignment */
|
|
|
|
__le32 s_agsize; /* 4: allocation group size in aggr. blocks */
|
|
|
|
__le32 s_flag; /* 4: aggregate attributes:
|
|
* see jfs_filsys.h
|
|
*/
|
|
__le32 s_state; /* 4: mount/unmount/recovery state:
|
|
* see jfs_filsys.h
|
|
*/
|
|
__le32 s_compress; /* 4: > 0 if data compression */
|
|
|
|
pxd_t s_ait2; /* 8: first extent of secondary
|
|
* aggregate inode table
|
|
*/
|
|
|
|
pxd_t s_aim2; /* 8: first extent of secondary
|
|
* aggregate inode map
|
|
*/
|
|
__le32 s_logdev; /* 4: device address of log */
|
|
__le32 s_logserial; /* 4: log serial number at aggregate mount */
|
|
pxd_t s_logpxd; /* 8: inline log extent */
|
|
|
|
pxd_t s_fsckpxd; /* 8: inline fsck work space extent */
|
|
|
|
struct timestruc_t s_time; /* 8: time last updated */
|
|
|
|
__le32 s_fsckloglen; /* 4: Number of filesystem blocks reserved for
|
|
* the fsck service log.
|
|
* N.B. These blocks are divided among the
|
|
* versions kept. This is not a per
|
|
* version size.
|
|
* N.B. These blocks are included in the
|
|
* length field of s_fsckpxd.
|
|
*/
|
|
s8 s_fscklog; /* 1: which fsck service log is most recent
|
|
* 0 => no service log data yet
|
|
* 1 => the first one
|
|
* 2 => the 2nd one
|
|
*/
|
|
char s_fpack[11]; /* 11: file system volume name
|
|
* N.B. This must be 11 bytes to
|
|
* conform with the OS/2 BootSector
|
|
* requirements
|
|
* Only used when s_version is 1
|
|
*/
|
|
|
|
/* extendfs() parameter under s_state & FM_EXTENDFS */
|
|
__le64 s_xsize; /* 8: extendfs s_size */
|
|
pxd_t s_xfsckpxd; /* 8: extendfs fsckpxd */
|
|
pxd_t s_xlogpxd; /* 8: extendfs logpxd */
|
|
/* - 128 byte boundary - */
|
|
|
|
char s_uuid[16]; /* 16: 128-bit uuid for volume */
|
|
char s_label[16]; /* 16: volume label */
|
|
char s_loguuid[16]; /* 16: 128-bit uuid for log device */
|
|
|
|
};
|
|
|
|
extern int readSuper(struct super_block *, struct buffer_head **);
|
|
extern int updateSuper(struct super_block *, uint);
|
|
extern void jfs_error(struct super_block *, const char *, ...);
|
|
extern int jfs_mount(struct super_block *);
|
|
extern int jfs_mount_rw(struct super_block *, int);
|
|
extern int jfs_umount(struct super_block *);
|
|
extern int jfs_umount_rw(struct super_block *);
|
|
|
|
extern int jfs_stop_threads;
|
|
extern struct completion jfsIOwait;
|
|
extern wait_queue_head_t jfs_IO_thread_wait;
|
|
extern wait_queue_head_t jfs_commit_thread_wait;
|
|
extern wait_queue_head_t jfs_sync_thread_wait;
|
|
extern int jfs_extendfs(struct super_block *, s64, int);
|
|
|
|
#endif /*_H_JFS_SUPERBLOCK */
|