From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- fs/jfs/jfs_superblock.h | 109 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 fs/jfs/jfs_superblock.h (limited to 'fs/jfs/jfs_superblock.h') diff --git a/fs/jfs/jfs_superblock.h b/fs/jfs/jfs_superblock.h new file mode 100644 index 000000000..93402c420 --- /dev/null +++ b/fs/jfs/jfs_superblock.h @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) International Business Machines Corp., 2000-2003 + */ +#ifndef _H_JFS_SUPERBLOCK +#define _H_JFS_SUPERBLOCK + +#include + +/* + * 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 */ + uuid_t s_uuid; /* 16: 128-bit uuid for volume */ + char s_label[16]; /* 16: volume label */ + uuid_t s_loguuid; /* 16: 128-bit uuid for log device */ + +}; + +extern int readSuper(struct super_block *, struct buffer_head **); +extern int updateSuper(struct super_block *, uint); +__printf(2, 3) +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_extendfs(struct super_block *, s64, int); + +extern struct task_struct *jfsIOthread; +extern struct task_struct *jfsSyncThread; + +#endif /*_H_JFS_SUPERBLOCK */ -- cgit v1.2.3