1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19 *  School of Computer Science
20 *  Carnegie Mellon University
21 *  Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26/*
27 * Common definitions for Berkeley Fast File System.
28 */
29
30/*
31 * Compatibility definitions for disk IO.
32 */
33
34/*
35 * Disk devices do all IO in 512-byte blocks.
36 */
37#define	DEV_BSIZE	512
38
39/*
40 * Conversion between bytes and disk blocks.
41 */
42#define	btodb(byte_offset)	((byte_offset) >> 9)
43#define	dbtob(block_number)	((block_number) << 9)
44
45/*
46 * Compatibility definitions for old type names.
47 */
48
49typedef unsigned char u_char;	/* unsigned char */
50typedef unsigned short u_short;	/* unsigned short */
51typedef unsigned int u_int;	/* unsigned int */
52
53#if !defined(__sun) || !defined(GRUB_UTIL)
54typedef struct _quad_
55  {
56    unsigned int val[2];	/* 2 int values make... */
57  }
58quad;				/* an 8-byte item */
59#endif /* !__sun || !GRUB_UTIL */
60
61typedef unsigned int mach_time_t;	/* an unsigned int */
62typedef unsigned int mach_daddr_t;	/* an unsigned int */
63typedef unsigned int mach_off_t;	/* another unsigned int */
64
65typedef unsigned short mach_uid_t;
66typedef unsigned short mach_gid_t;
67typedef unsigned int mach_ino_t;
68
69#ifndef NBBY
70#define	NBBY	8
71#endif
72
73/*
74 * The file system is made out of blocks of at most MAXBSIZE units,
75 * with smaller units (fragments) only in the last direct block.
76 * MAXBSIZE primarily determines the size of buffers in the buffer
77 * pool.  It may be made larger without any effect on existing
78 * file systems; however, making it smaller may make some file
79 * systems unmountable.
80 *
81 * Note that the disk devices are assumed to have DEV_BSIZE "sectors"
82 * and that fragments must be some multiple of this size.
83 */
84#define	MAXBSIZE	8192
85#define	MAXFRAG		8
86
87/*
88 * MAXPATHLEN defines the longest permissible path length
89 * after expanding symbolic links.
90 *
91 * MAXSYMLINKS defines the maximum number of symbolic links
92 * that may be expanded in a path name.  It should be set
93 * high enough to allow all legitimate uses, but halt infinite
94 * loops reasonably quickly.
95 */
96
97#define	MAXPATHLEN	1024
98#define	MAXSYMLINKS	8
99