[people/ms/linux.git] / include / linux / efs_dir.h

/*
 * efs_dir.h
 *
 * Copyright (c) 1999 Al Smith
 */

#ifndef __EFS_DIR_H__
#define __EFS_DIR_H__

#define EFS_DIRBSIZE_BITS	EFS_BLOCKSIZE_BITS
#define EFS_DIRBSIZE		(1 << EFS_DIRBSIZE_BITS)

struct efs_dentry {
	__be32		inode;
	unsigned char	namelen;
	char		name[3];
};

#define EFS_DENTSIZE	(sizeof(struct efs_dentry) - 3 + 1)
#define EFS_MAXNAMELEN  ((1 << (sizeof(char) * 8)) - 1)

#define EFS_DIRBLK_HEADERSIZE	4
#define EFS_DIRBLK_MAGIC	0xbeef	/* moo */

struct efs_dir {
	__be16	magic;
	unsigned char	firstused;
	unsigned char	slots;

	unsigned char	space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
};

#define EFS_MAXENTS \
	((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
	 (EFS_DENTSIZE + sizeof(char)))

#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])

#define EFS_REALOFF(offset) ((offset << 1))

#endif /* __EFS_DIR_H__ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* efs_dir.h
	3	*
	4	* Copyright (c) 1999 Al Smith
	5	*/
	6
	7	#ifndef __EFS_DIR_H__
	8	#define __EFS_DIR_H__
	9
	10	#define EFS_DIRBSIZE_BITS EFS_BLOCKSIZE_BITS
	11	#define EFS_DIRBSIZE (1 << EFS_DIRBSIZE_BITS)
	12
	13	struct efs_dentry {
	14	__be32 inode;
	15	unsigned char namelen;
	16	char name[3];
	17	};
	18
	19	#define EFS_DENTSIZE (sizeof(struct efs_dentry) - 3 + 1)
	20	#define EFS_MAXNAMELEN ((1 << (sizeof(char) * 8)) - 1)
	21
	22	#define EFS_DIRBLK_HEADERSIZE 4
	23	#define EFS_DIRBLK_MAGIC 0xbeef /* moo */
	24
	25	struct efs_dir {
	26	__be16 magic;
	27	unsigned char firstused;
	28	unsigned char slots;
	29
	30	unsigned char space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
	31	};
	32
	33	#define EFS_MAXENTS \
	34	((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
	35	(EFS_DENTSIZE + sizeof(char)))
	36
	37	#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
	38
	39	#define EFS_REALOFF(offset) ((offset << 1))
	40
	41	#endif /* __EFS_DIR_H__ */
	42