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      1 /*	$NetBSD: config.h,v 1.9 2012/02/02 03:50:32 perseant Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)config.h	8.3 (Berkeley) 5/24/95
     32  */
     33 
     34 /*
     35  * Version of the LFS to make.  Default to the newest one.
     36  */
     37 #define DFL_VERSION LFS_VERSION
     38 
     39 /*
     40  * 1/DFL_MIN_FREE_SEGS gives the fraction of segments to be reserved for
     41  * the cleaner.
     42  */
     43 #define DFL_MIN_FREE_SEGS 10
     44 
     45 /*
     46  * MINFREE gives the minimum acceptable percentage of file system
     47  * blocks which may be free. If the freelist drops below this level
     48  * only the superuser may continue to allocate blocks.
     49  */
     50 #define MINFREE		10
     51 
     52 /*
     53  * The following constants set the default block and segment size for a log
     54  * structured file system.  The block size must be a power of two and less
     55  * than the segment size.
     56  */
     57 #define	LFS_MINSEGSIZE		(64 * 1024)
     58 #define	DFL_LFSSEG		(1024 * 1024)
     59 #define	DFL_LFSSEG_SHIFT	20
     60 #define	DFL_LFSSEG_MASK		0xFFFFF
     61 
     62 #define	LFS_MINBLOCKSIZE	512
     63 #define	DFL_LFSBLOCK		8192
     64 #define	DFL_LFSBLOCK_SHIFT	13
     65 #define	DFL_LFSBLOCK_MASK	0x1FFF
     66 
     67 #define DFL_LFSFRAG		1024
     68 #define DFL_LFS_FFMASK		0x3FF
     69 #define DFL_LFS_FFSHIFT		10
     70 #define DFL_LFS_FBMASK		0x7
     71 #define DFL_LFS_FBSHIFT		3
     72 
     73 #define SMALL_FSSIZE		65536 /* sectors */
     74 #define SMALL_LFSSEG		32768
     75 #define SMALL_LFSBLOCK		1024
     76 #define SMALL_LFSFRAG		512
     77