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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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* Carnegie Mellon requests users of this software to return to
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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* Common definitions for Berkeley Fast File System.
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* Compatibility definitions for disk IO.
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* Disk devices do all IO in 512-byte blocks.
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* Conversion between bytes and disk blocks.
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#define btodb(byte_offset) ((byte_offset) >> 9)
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#define dbtob(block_number) ((block_number) << 9)
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* Compatibility definitions for old type names.
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typedef unsigned char u_char; /* unsigned char */
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typedef unsigned short u_short; /* unsigned short */
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typedef unsigned int u_int; /* unsigned int */
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unsigned int val[2]; /* 2 int values make... */
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quad; /* an 8-byte item */
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typedef unsigned int mach_time_t; /* an unsigned int */
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typedef unsigned int mach_daddr_t; /* an unsigned int */
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typedef unsigned int mach_off_t; /* another unsigned int */
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typedef unsigned short mach_uid_t;
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typedef unsigned short mach_gid_t;
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typedef unsigned int mach_ino_t;
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* The file system is made out of blocks of at most MAXBSIZE units,
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* with smaller units (fragments) only in the last direct block.
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* MAXBSIZE primarily determines the size of buffers in the buffer
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* pool. It may be made larger without any effect on existing
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* file systems; however, making it smaller may make some file
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* systems unmountable.
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* Note that the disk devices are assumed to have DEV_BSIZE "sectors"
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* and that fragments must be some multiple of this size.
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* MAXPATHLEN defines the longest permissible path length
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* after expanding symbolic links.
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* MAXSYMLINKS defines the maximum number of symbolic links
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* that may be expanded in a path name. It should be set
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* high enough to allow all legitimate uses, but halt infinite
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* loops reasonably quickly.
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#define MAXPATHLEN 1024
added
removed
stage2/defs.h
