mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 12:44:11 +08:00
0b1e987c56
When I wrote the freevxfs driver I had some odd choice of licensing statements, the options are either GPL (without version) or an odd BSD-ish licensense with advertising clause. The GPL vs always meant to be the same as the kernel, that is version 2 only, and the odd BSD-ish license doesn't make much sense. Add a GPL2.0-only SPDX tag to make the GPL intentions clear and drop the bogus BSD license. Acked-by: Krzysztof Błaszkowski <kb@sysmikro.com.pl> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2000-2001 Christoph Hellwig.
|
|
*/
|
|
#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_ */
|