mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
0d83f7fc83
To support VxFS filesystems from HP-UX on x86 systems we need to implement byte swapping, and to keep support for Unixware filesystems it needs to be the complicated dual-endian kind ala sysvfs. To do this properly we have to split the on disk and in-core inode so that we can keep the in-core one in native endianness. All other structures are byteswapped on demand. Signed-off-by: Krzysztof Błaszkowski <kb@sysmikro.com.pl> [hch: make spare happy] Signed-off-by: Christoph Hellwig <hch@lst.de>
94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2000-2001 Christoph Hellwig.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL").
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
|
|
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
#ifndef _VXFS_DIR_H_
|
|
#define _VXFS_DIR_H_
|
|
|
|
/*
|
|
* Veritas filesystem driver - directory structure.
|
|
*
|
|
* This file contains the definition of the vxfs directory format.
|
|
*/
|
|
|
|
|
|
/*
|
|
* VxFS directory block header.
|
|
*
|
|
* This entry is the head of every filesystem block in a directory.
|
|
* It is used for free space management and additionally includes
|
|
* a hash for speeding up directory search (lookup).
|
|
*
|
|
* The hash may be empty and in fact we do not use it all in the
|
|
* Linux driver for now.
|
|
*/
|
|
struct vxfs_dirblk {
|
|
__fs16 d_free; /* free space in dirblock */
|
|
__fs16 d_nhash; /* no of hash chains */
|
|
__fs16 d_hash[1]; /* hash chain */
|
|
};
|
|
|
|
/*
|
|
* VXFS_NAMELEN is the maximum length of the d_name field
|
|
* of an VxFS directory entry.
|
|
*/
|
|
#define VXFS_NAMELEN 256
|
|
|
|
/*
|
|
* VxFS directory entry.
|
|
*/
|
|
struct vxfs_direct {
|
|
__fs32 d_ino; /* inode number */
|
|
__fs16 d_reclen; /* record length */
|
|
__fs16 d_namelen; /* d_name length */
|
|
__fs16 d_hashnext; /* next hash entry */
|
|
char d_name[VXFS_NAMELEN]; /* name */
|
|
};
|
|
|
|
/*
|
|
* VXFS_DIRPAD defines the directory entry boundaries, is _must_ be
|
|
* a multiple of four.
|
|
* VXFS_NAMEMIN is the length of a directory entry with a NULL d_name.
|
|
* VXFS_DIRROUND is an internal macros that rounds a length to a value
|
|
* usable for directory sizes.
|
|
* VXFS_DIRLEN calculates the directory entry size for an entry with
|
|
* a d_name with size len.
|
|
*/
|
|
#define VXFS_DIRPAD 4
|
|
#define VXFS_NAMEMIN offsetof(struct vxfs_direct, d_name)
|
|
#define VXFS_DIRROUND(len) ((VXFS_DIRPAD + (len) - 1) & ~(VXFS_DIRPAD -1))
|
|
#define VXFS_DIRLEN(len) (VXFS_DIRROUND(VXFS_NAMEMIN + (len)))
|
|
|
|
/*
|
|
* VXFS_DIRBLKOV is the overhead of a specific dirblock.
|
|
*/
|
|
#define VXFS_DIRBLKOV(sbi, dbp) \
|
|
((sizeof(short) * fs16_to_cpu(sbi, dbp->d_nhash)) + 4)
|
|
|
|
#endif /* _VXFS_DIR_H_ */
|