48d7c317e8
kernel. Don't make more superblock segments than we have a record of in the superblock; and print these out as we go, like newfs. Add am "-M" flag to specify the number of reserved segments, with a note in the man page not to use it.
90 lines
3.4 KiB
C
90 lines
3.4 KiB
C
/* $NetBSD: config.h,v 1.4 2000/07/04 22:35:04 perseant Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)config.h 8.3 (Berkeley) 5/24/95
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*/
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/*
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* The first boot and super blocks are given in absolute disk addresses.
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* The byte-offset forms are preferred, as they don't imply a sector size.
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*/
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#define BBSIZE 8192
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#define SBSIZE 8192
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/*
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* The following two constants set the default block and fragment sizes.
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* Both constants must be a power of 2 and meet the following constraints:
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* MINBSIZE <= DESBLKSIZE <= MAXBSIZE
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* sectorsize <= DESFRAGSIZE <= DESBLKSIZE
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* DESBLKSIZE / DESFRAGSIZE <= 8
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*/
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#define DFL_FRAGSIZE 1024
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#define DFL_BLKSIZE 8192
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/*
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* 1/DFL_MIN_FREE_SEGS gives the fraction of segments to be reserved for
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* the cleaner. Experimental data show this number should be around
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* 5-10.
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*/
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#define DFL_MIN_FREE_SEGS 10
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/*
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* MINFREE gives the minimum acceptable percentage of file system
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* blocks which may be free. If the freelist drops below this level
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* only the superuser may continue to allocate blocks.
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*/
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#define MINFREE 10
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/*
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* The following constants set the default block and segment size for a log
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* structured file system. Both must be powers of two and the segment size
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* must be a multiple of the block size. We also set minimum block and segment
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* sizes.
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*/
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#define LFS_MINSEGSIZE (64*1024)
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#define DFL_LFSSEG (1024 * 1024)
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#define DFL_LFSSEG_SHIFT 20
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#define DFL_LFSSEG_MASK 0xFFFFF
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#define LFS_MINBLOCKSIZE 512
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#define DFL_LFSBLOCK 8192
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#define DFL_LFSBLOCK_SHIFT 13
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#define DFL_LFSBLOCK_MASK 0x1FFF
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#define DFL_LFSFRAG 1024
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#define DFL_LFS_FFMASK 0x3FF
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#define DFL_LFS_FFSHIFT 10
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#define DFL_LFS_FBMASK 0x7
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#define DFL_LFS_FBSHIFT 3
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