config.h revision 1.3
1 /* $NetBSD: config.h,v 1.3 2000/07/03 01:49:11 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)config.h 8.3 (Berkeley) 5/24/95 36 */ 37 38 /* 39 * The first boot and super blocks are given in absolute disk addresses. 40 * The byte-offset forms are preferred, as they don't imply a sector size. 41 */ 42 #define BBSIZE 8192 43 #define SBSIZE 8192 44 45 /* 46 * The following two constants set the default block and fragment sizes. 47 * Both constants must be a power of 2 and meet the following constraints: 48 * MINBSIZE <= DESBLKSIZE <= MAXBSIZE 49 * sectorsize <= DESFRAGSIZE <= DESBLKSIZE 50 * DESBLKSIZE / DESFRAGSIZE <= 8 51 */ 52 #define DFL_FRAGSIZE 1024 53 #define DFL_BLKSIZE 8192 54 55 /* 56 * 1/DFL_MIN_FREE_SEGS gives the fraction of segments to be reserved for 57 * the cleaner. Experimental data show this number should be around 58 * 5-10. 59 */ 60 #define DFL_MIN_FREE_SEGS 8 61 62 /* 63 * MINFREE gives the minimum acceptable percentage of file system 64 * blocks which may be free. If the freelist drops below this level 65 * only the superuser may continue to allocate blocks. 66 */ 67 #define MINFREE 10 68 69 /* 70 * The following constants set the default block and segment size for a log 71 * structured file system. Both must be powers of two and the segment size 72 * must be a multiple of the block size. We also set minimum block and segment 73 * sizes. 74 */ 75 #define LFS_MINSEGSIZE (64*1024) 76 #define DFL_LFSSEG (1024 * 1024) 77 #define DFL_LFSSEG_SHIFT 20 78 #define DFL_LFSSEG_MASK 0xFFFFF 79 80 #define LFS_MINBLOCKSIZE 512 81 #define DFL_LFSBLOCK 8192 82 #define DFL_LFSBLOCK_SHIFT 13 83 #define DFL_LFSBLOCK_MASK 0x1FFF 84 85 #define DFL_LFSFRAG 1024 86 #define DFL_LFS_FFMASK 0x3FF 87 #define DFL_LFS_FFSHIFT 10 88 #define DFL_LFS_FBMASK 0x7 89 #define DFL_LFS_FBSHIFT 3 90
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