mkfs.c revision 92712
11558Srgrimes/* 21558Srgrimes * Copyright (c) 1980, 1989, 1993 31558Srgrimes * The Regents of the University of California. All rights reserved. 41558Srgrimes * 51558Srgrimes * Redistribution and use in source and binary forms, with or without 61558Srgrimes * modification, are permitted provided that the following conditions 71558Srgrimes * are met: 81558Srgrimes * 1. Redistributions of source code must retain the above copyright 91558Srgrimes * notice, this list of conditions and the following disclaimer. 101558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111558Srgrimes * notice, this list of conditions and the following disclaimer in the 121558Srgrimes * documentation and/or other materials provided with the distribution. 131558Srgrimes * 3. All advertising materials mentioning features or use of this software 141558Srgrimes * must display the following acknowledgement: 151558Srgrimes * This product includes software developed by the University of 161558Srgrimes * California, Berkeley and its contributors. 171558Srgrimes * 4. Neither the name of the University nor the names of its contributors 181558Srgrimes * may be used to endorse or promote products derived from this software 191558Srgrimes * without specific prior written permission. 201558Srgrimes * 211558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311558Srgrimes * SUCH DAMAGE. 321558Srgrimes */ 331558Srgrimes 341558Srgrimes#ifndef lint 3537664Scharnier#if 0 3623682Speterstatic char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95"; 3737664Scharnier#endif 3837664Scharnierstatic const char rcsid[] = 3950476Speter "$FreeBSD: head/sbin/newfs/mkfs.c 92712 2002-03-19 17:39:01Z iedowse $"; 401558Srgrimes#endif /* not lint */ 411558Srgrimes 4237664Scharnier#include <err.h> 4337664Scharnier#include <signal.h> 4492709Siedowse#include <stdlib.h> 4537664Scharnier#include <string.h> 4637664Scharnier#include <stdio.h> 471558Srgrimes#include <unistd.h> 481558Srgrimes#include <sys/param.h> 491558Srgrimes#include <sys/time.h> 5037664Scharnier#include <sys/types.h> 511558Srgrimes#include <sys/wait.h> 521558Srgrimes#include <sys/resource.h> 5343804Sdillon#include <sys/stat.h> 541558Srgrimes#include <ufs/ufs/dinode.h> 551558Srgrimes#include <ufs/ufs/dir.h> 561558Srgrimes#include <ufs/ffs/fs.h> 571558Srgrimes#include <sys/disklabel.h> 583550Sphk#include <sys/file.h> 593550Sphk#include <sys/mman.h> 6013637Sjoerg#include <sys/ioctl.h> 611558Srgrimes 621558Srgrimes/* 631558Srgrimes * make file system for cylinder-group style file systems 641558Srgrimes */ 651558Srgrimes 661558Srgrimes/* 671558Srgrimes * We limit the size of the inode map to be no more than a 681558Srgrimes * third of the cylinder group space, since we must leave at 691558Srgrimes * least an equal amount of space for the block map. 701558Srgrimes * 711558Srgrimes * N.B.: MAXIPG must be a multiple of INOPB(fs). 721558Srgrimes */ 731558Srgrimes#define MAXIPG(fs) roundup((fs)->fs_bsize * NBBY / 3, INOPB(fs)) 741558Srgrimes 751558Srgrimes#define UMASK 0755 761558Srgrimes#define MAXINOPB (MAXBSIZE / sizeof(struct dinode)) 771558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 781558Srgrimes 791558Srgrimes/* 801558Srgrimes * variables set up by front end. 811558Srgrimes */ 821558Srgrimesextern int Nflag; /* run mkfs without writing file system */ 831558Srgrimesextern int Oflag; /* format as an 4.3BSD file system */ 8475078Sobrienextern int Uflag; /* enable soft updates for file system */ 851558Srgrimesextern int fssize; /* file system size */ 861558Srgrimesextern int ntracks; /* # tracks/cylinder */ 871558Srgrimesextern int nsectors; /* # sectors/track */ 881558Srgrimesextern int nphyssectors; /* # sectors/track including spares */ 891558Srgrimesextern int secpercyl; /* sectors per cylinder */ 901558Srgrimesextern int sectorsize; /* bytes/sector */ 9120061Ssosextern int realsectorsize; /* bytes/sector in hardware*/ 921558Srgrimesextern int rpm; /* revolutions/minute of drive */ 931558Srgrimesextern int interleave; /* hardware sector interleave */ 941558Srgrimesextern int trackskew; /* sector 0 skew, per track */ 951558Srgrimesextern int fsize; /* fragment size */ 961558Srgrimesextern int bsize; /* block size */ 971558Srgrimesextern int cpg; /* cylinders/cylinder group */ 981558Srgrimesextern int cpgflg; /* cylinders/cylinder group flag was given */ 991558Srgrimesextern int minfree; /* free space threshold */ 1001558Srgrimesextern int opt; /* optimization preference (space or time) */ 1011558Srgrimesextern int density; /* number of bytes per inode */ 1021558Srgrimesextern int maxcontig; /* max contiguous blocks to allocate */ 1031558Srgrimesextern int rotdelay; /* rotational delay between blocks */ 1041558Srgrimesextern int maxbpg; /* maximum blocks per file in a cyl group */ 1051558Srgrimesextern int nrpos; /* # of distinguished rotational positions */ 1061558Srgrimesextern int bbsize; /* boot block size */ 1071558Srgrimesextern int sbsize; /* superblock size */ 10875377Smckusickextern int avgfilesize; /* expected average file size */ 10975377Smckusickextern int avgfilesperdir; /* expected number of files per directory */ 1101558Srgrimes 1111558Srgrimesunion { 1121558Srgrimes struct fs fs; 1131558Srgrimes char pad[SBSIZE]; 1141558Srgrimes} fsun; 1151558Srgrimes#define sblock fsun.fs 1161558Srgrimesstruct csum *fscs; 1171558Srgrimes 1181558Srgrimesunion { 1191558Srgrimes struct cg cg; 1201558Srgrimes char pad[MAXBSIZE]; 1211558Srgrimes} cgun; 1221558Srgrimes#define acg cgun.cg 1231558Srgrimes 1241558Srgrimesstruct dinode zino[MAXBSIZE / sizeof(struct dinode)]; 1251558Srgrimes 12624215Sacheint fsi, fso; 12724215Sacheint randinit; 1281558Srgrimesdaddr_t alloc(); 12927372Sbdelong calcipg(); 13013769Sjoergstatic int charsperline(); 13192483Sphkvoid clrblock (struct fs *, unsigned char *, int); 13292483Sphkvoid fsinit (time_t); 13392712Siedowsestatic int ilog2(int); 13492483Sphkvoid initcg (int, time_t); 13592483Sphkint isblock (struct fs *, unsigned char *, int); 13692483Sphkvoid iput (struct dinode *, ino_t); 13792483Sphkint makedir (struct direct *, int); 13892483Sphkvoid rdfs (daddr_t, int, char *); 13992483Sphkvoid setblock (struct fs *, unsigned char *, int); 14092483Sphkvoid wtfs (daddr_t, int, char *); 14192483Sphkvoid wtfsflush (void); 1421558Srgrimes 14337664Scharniervoid 14492711Siedowsemkfs(struct partition *pp, char *fsys, int fi, int fo) 1451558Srgrimes{ 14692483Sphk long i, mincpc, mincpg, inospercg; 1471558Srgrimes long cylno, rpos, blk, j, warn = 0; 1481558Srgrimes long used, mincpgcnt, bpcg; 14923682Speter off_t usedb; 1501558Srgrimes long mapcramped, inodecramped; 1511558Srgrimes long postblsize, rotblsize, totalsbsize; 1521558Srgrimes time_t utime; 1531558Srgrimes quad_t sizepb; 15413769Sjoerg int width; 15513769Sjoerg char tmpbuf[100]; /* XXX this will break in about 2,500 years */ 1561558Srgrimes 1571558Srgrimes time(&utime); 15824215Sache if (!randinit) { 15924215Sache randinit = 1; 16026625Sache srandomdev(); 16124215Sache } 1621558Srgrimes fsi = fi; 1631558Srgrimes fso = fo; 1641558Srgrimes if (Oflag) { 1651558Srgrimes sblock.fs_inodefmt = FS_42INODEFMT; 1661558Srgrimes sblock.fs_maxsymlinklen = 0; 1671558Srgrimes } else { 1681558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 1691558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 1701558Srgrimes } 17175124Sbde if (Uflag) 17275078Sobrien sblock.fs_flags |= FS_DOSOFTDEP; 1731558Srgrimes /* 1741558Srgrimes * Validate the given file system size. 1751558Srgrimes * Verify that its last block can actually be accessed. 1761558Srgrimes */ 1771558Srgrimes if (fssize <= 0) 1781558Srgrimes printf("preposterous size %d\n", fssize), exit(13); 17920061Ssos wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize, 18092532Sbde (char *)&sblock); 1811558Srgrimes /* 1821558Srgrimes * collect and verify the sector and track info 1831558Srgrimes */ 1841558Srgrimes sblock.fs_nsect = nsectors; 1851558Srgrimes sblock.fs_ntrak = ntracks; 1861558Srgrimes if (sblock.fs_ntrak <= 0) 1871558Srgrimes printf("preposterous ntrak %d\n", sblock.fs_ntrak), exit(14); 1881558Srgrimes if (sblock.fs_nsect <= 0) 1891558Srgrimes printf("preposterous nsect %d\n", sblock.fs_nsect), exit(15); 1901558Srgrimes /* 19175377Smckusick * collect and verify the filesystem density info 19275377Smckusick */ 19375377Smckusick sblock.fs_avgfilesize = avgfilesize; 19475377Smckusick sblock.fs_avgfpdir = avgfilesperdir; 19575377Smckusick if (sblock.fs_avgfilesize <= 0) 19675377Smckusick printf("illegal expected average file size %d\n", 19775377Smckusick sblock.fs_avgfilesize), exit(14); 19875377Smckusick if (sblock.fs_avgfpdir <= 0) 19975377Smckusick printf("illegal expected number of files per directory %d\n", 20075377Smckusick sblock.fs_avgfpdir), exit(15); 20175377Smckusick /* 2021558Srgrimes * collect and verify the block and fragment sizes 2031558Srgrimes */ 2041558Srgrimes sblock.fs_bsize = bsize; 2051558Srgrimes sblock.fs_fsize = fsize; 2061558Srgrimes if (!POWEROF2(sblock.fs_bsize)) { 2071558Srgrimes printf("block size must be a power of 2, not %d\n", 2081558Srgrimes sblock.fs_bsize); 2091558Srgrimes exit(16); 2101558Srgrimes } 2111558Srgrimes if (!POWEROF2(sblock.fs_fsize)) { 2121558Srgrimes printf("fragment size must be a power of 2, not %d\n", 2131558Srgrimes sblock.fs_fsize); 2141558Srgrimes exit(17); 2151558Srgrimes } 2161558Srgrimes if (sblock.fs_fsize < sectorsize) { 2171558Srgrimes printf("fragment size %d is too small, minimum is %d\n", 2181558Srgrimes sblock.fs_fsize, sectorsize); 2191558Srgrimes exit(18); 2201558Srgrimes } 2211558Srgrimes if (sblock.fs_bsize < MINBSIZE) { 2221558Srgrimes printf("block size %d is too small, minimum is %d\n", 2231558Srgrimes sblock.fs_bsize, MINBSIZE); 2241558Srgrimes exit(19); 2251558Srgrimes } 2261558Srgrimes if (sblock.fs_bsize < sblock.fs_fsize) { 22792532Sbde printf( 22892532Sbde "block size (%d) cannot be smaller than fragment size (%d)\n", 22992532Sbde sblock.fs_bsize, sblock.fs_fsize); 2301558Srgrimes exit(20); 2311558Srgrimes } 2321558Srgrimes sblock.fs_bmask = ~(sblock.fs_bsize - 1); 2331558Srgrimes sblock.fs_fmask = ~(sblock.fs_fsize - 1); 2341558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2351558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 23692712Siedowse sblock.fs_bshift = ilog2(sblock.fs_bsize); 23792712Siedowse sblock.fs_fshift = ilog2(sblock.fs_fsize); 2381558Srgrimes sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); 23992712Siedowse sblock.fs_fragshift = ilog2(sblock.fs_frag); 2401558Srgrimes if (sblock.fs_frag > MAXFRAG) { 24192532Sbde printf( 24292532Sbde "fragment size %d is too small, minimum with block size %d is %d\n", 24392532Sbde sblock.fs_fsize, sblock.fs_bsize, 2441558Srgrimes sblock.fs_bsize / MAXFRAG); 2451558Srgrimes exit(21); 2461558Srgrimes } 2471558Srgrimes sblock.fs_nrpos = nrpos; 2481558Srgrimes sblock.fs_nindir = sblock.fs_bsize / sizeof(daddr_t); 2491558Srgrimes sblock.fs_inopb = sblock.fs_bsize / sizeof(struct dinode); 2501558Srgrimes sblock.fs_nspf = sblock.fs_fsize / sectorsize; 25192712Siedowse sblock.fs_fsbtodb = ilog2(NSPF(&sblock)); 2521558Srgrimes sblock.fs_sblkno = 2531558Srgrimes roundup(howmany(bbsize + sbsize, sblock.fs_fsize), sblock.fs_frag); 2541558Srgrimes sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno + 2551558Srgrimes roundup(howmany(sbsize, sblock.fs_fsize), sblock.fs_frag)); 2561558Srgrimes sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; 25785860Sphk sblock.fs_cgoffset = 25885860Sphk roundup(howmany(sblock.fs_nsect, NSPF(&sblock)), sblock.fs_frag); 2591558Srgrimes for (sblock.fs_cgmask = 0xffffffff, i = sblock.fs_ntrak; i > 1; i >>= 1) 2601558Srgrimes sblock.fs_cgmask <<= 1; 2611558Srgrimes if (!POWEROF2(sblock.fs_ntrak)) 2621558Srgrimes sblock.fs_cgmask <<= 1; 2631558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2641558Srgrimes for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) { 2651558Srgrimes sizepb *= NINDIR(&sblock); 2661558Srgrimes sblock.fs_maxfilesize += sizepb; 2671558Srgrimes } 2681558Srgrimes /* 2691558Srgrimes * Validate specified/determined secpercyl 2701558Srgrimes * and calculate minimum cylinders per group. 2711558Srgrimes */ 2721558Srgrimes sblock.fs_spc = secpercyl; 2731558Srgrimes for (sblock.fs_cpc = NSPB(&sblock), i = sblock.fs_spc; 2741558Srgrimes sblock.fs_cpc > 1 && (i & 1) == 0; 2751558Srgrimes sblock.fs_cpc >>= 1, i >>= 1) 2761558Srgrimes /* void */; 2771558Srgrimes mincpc = sblock.fs_cpc; 2781558Srgrimes bpcg = sblock.fs_spc * sectorsize; 2791558Srgrimes inospercg = roundup(bpcg / sizeof(struct dinode), INOPB(&sblock)); 2801558Srgrimes if (inospercg > MAXIPG(&sblock)) 2811558Srgrimes inospercg = MAXIPG(&sblock); 2821558Srgrimes used = (sblock.fs_iblkno + inospercg / INOPF(&sblock)) * NSPF(&sblock); 2831558Srgrimes mincpgcnt = howmany(sblock.fs_cgoffset * (~sblock.fs_cgmask) + used, 2841558Srgrimes sblock.fs_spc); 2851558Srgrimes mincpg = roundup(mincpgcnt, mincpc); 2861558Srgrimes /* 2871558Srgrimes * Ensure that cylinder group with mincpg has enough space 2881558Srgrimes * for block maps. 2891558Srgrimes */ 2901558Srgrimes sblock.fs_cpg = mincpg; 2911558Srgrimes sblock.fs_ipg = inospercg; 2921558Srgrimes if (maxcontig > 1) 2931558Srgrimes sblock.fs_contigsumsize = MIN(maxcontig, FS_MAXCONTIG); 2941558Srgrimes mapcramped = 0; 2951558Srgrimes while (CGSIZE(&sblock) > sblock.fs_bsize) { 2961558Srgrimes mapcramped = 1; 2971558Srgrimes if (sblock.fs_bsize < MAXBSIZE) { 2981558Srgrimes sblock.fs_bsize <<= 1; 29985860Sphk if ((i & 1) == 0) 3001558Srgrimes i >>= 1; 30185860Sphk else { 3021558Srgrimes sblock.fs_cpc <<= 1; 3031558Srgrimes mincpc <<= 1; 3041558Srgrimes mincpg = roundup(mincpgcnt, mincpc); 3051558Srgrimes sblock.fs_cpg = mincpg; 3061558Srgrimes } 3071558Srgrimes sblock.fs_frag <<= 1; 3081558Srgrimes sblock.fs_fragshift += 1; 3091558Srgrimes if (sblock.fs_frag <= MAXFRAG) 3101558Srgrimes continue; 3111558Srgrimes } 3121558Srgrimes if (sblock.fs_fsize == sblock.fs_bsize) { 3131558Srgrimes printf("There is no block size that"); 3141558Srgrimes printf(" can support this disk\n"); 3151558Srgrimes exit(22); 3161558Srgrimes } 3171558Srgrimes sblock.fs_frag >>= 1; 3181558Srgrimes sblock.fs_fragshift -= 1; 3191558Srgrimes sblock.fs_fsize <<= 1; 3201558Srgrimes sblock.fs_nspf <<= 1; 3211558Srgrimes } 3221558Srgrimes /* 3231558Srgrimes * Ensure that cylinder group with mincpg has enough space for inodes. 3241558Srgrimes */ 3251558Srgrimes inodecramped = 0; 32623682Speter inospercg = calcipg(mincpg, bpcg, &usedb); 3271558Srgrimes sblock.fs_ipg = inospercg; 3281558Srgrimes while (inospercg > MAXIPG(&sblock)) { 3291558Srgrimes inodecramped = 1; 3301558Srgrimes if (mincpc == 1 || sblock.fs_frag == 1 || 3311558Srgrimes sblock.fs_bsize == MINBSIZE) 3321558Srgrimes break; 3331558Srgrimes printf("With a block size of %d %s %d\n", sblock.fs_bsize, 33485860Sphk "minimum bytes per inode is", 33585860Sphk (int)((mincpg * (off_t)bpcg - usedb) / 33685860Sphk MAXIPG(&sblock) + 1)); 3371558Srgrimes sblock.fs_bsize >>= 1; 3381558Srgrimes sblock.fs_frag >>= 1; 3391558Srgrimes sblock.fs_fragshift -= 1; 3401558Srgrimes mincpc >>= 1; 3411558Srgrimes sblock.fs_cpg = roundup(mincpgcnt, mincpc); 3421558Srgrimes if (CGSIZE(&sblock) > sblock.fs_bsize) { 3431558Srgrimes sblock.fs_bsize <<= 1; 3441558Srgrimes break; 3451558Srgrimes } 3461558Srgrimes mincpg = sblock.fs_cpg; 34723682Speter inospercg = calcipg(mincpg, bpcg, &usedb); 3481558Srgrimes sblock.fs_ipg = inospercg; 3491558Srgrimes } 3501558Srgrimes if (inodecramped) { 3511558Srgrimes if (inospercg > MAXIPG(&sblock)) { 3521558Srgrimes printf("Minimum bytes per inode is %d\n", 35385860Sphk (int)((mincpg * (off_t)bpcg - usedb) / 35485860Sphk MAXIPG(&sblock) + 1)); 3551558Srgrimes } else if (!mapcramped) { 3561558Srgrimes printf("With %d bytes per inode, ", density); 35737239Sbde printf("minimum cylinders per group is %ld\n", mincpg); 3581558Srgrimes } 3591558Srgrimes } 3601558Srgrimes if (mapcramped) { 3611558Srgrimes printf("With %d sectors per cylinder, ", sblock.fs_spc); 36237239Sbde printf("minimum cylinders per group is %ld\n", mincpg); 3631558Srgrimes } 3641558Srgrimes if (inodecramped || mapcramped) { 3651558Srgrimes if (sblock.fs_bsize != bsize) 3661558Srgrimes printf("%s to be changed from %d to %d\n", 3671558Srgrimes "This requires the block size", 3681558Srgrimes bsize, sblock.fs_bsize); 3691558Srgrimes if (sblock.fs_fsize != fsize) 3701558Srgrimes printf("\t%s to be changed from %d to %d\n", 37185860Sphk "and the fragment size", fsize, sblock.fs_fsize); 3721558Srgrimes exit(23); 3731558Srgrimes } 3748871Srgrimes /* 3751558Srgrimes * Calculate the number of cylinders per group 3761558Srgrimes */ 3771558Srgrimes sblock.fs_cpg = cpg; 3781558Srgrimes if (sblock.fs_cpg % mincpc != 0) { 37937239Sbde printf("%s groups must have a multiple of %ld cylinders\n", 38085860Sphk cpgflg ? "Cylinder" : "Warning: cylinder", mincpc); 3811558Srgrimes sblock.fs_cpg = roundup(sblock.fs_cpg, mincpc); 3821558Srgrimes if (!cpgflg) 3831558Srgrimes cpg = sblock.fs_cpg; 3841558Srgrimes } 3851558Srgrimes /* 3861558Srgrimes * Must ensure there is enough space for inodes. 3871558Srgrimes */ 38823682Speter sblock.fs_ipg = calcipg(sblock.fs_cpg, bpcg, &usedb); 3891558Srgrimes while (sblock.fs_ipg > MAXIPG(&sblock)) { 3901558Srgrimes inodecramped = 1; 3911558Srgrimes sblock.fs_cpg -= mincpc; 39223682Speter sblock.fs_ipg = calcipg(sblock.fs_cpg, bpcg, &usedb); 3931558Srgrimes } 3941558Srgrimes /* 3951558Srgrimes * Must ensure there is enough space to hold block map. 3961558Srgrimes */ 3971558Srgrimes while (CGSIZE(&sblock) > sblock.fs_bsize) { 3981558Srgrimes mapcramped = 1; 3991558Srgrimes sblock.fs_cpg -= mincpc; 40023682Speter sblock.fs_ipg = calcipg(sblock.fs_cpg, bpcg, &usedb); 4011558Srgrimes } 4021558Srgrimes sblock.fs_fpg = (sblock.fs_cpg * sblock.fs_spc) / NSPF(&sblock); 4031558Srgrimes if ((sblock.fs_cpg * sblock.fs_spc) % NSPB(&sblock) != 0) { 40437239Sbde printf("panic (fs_cpg * fs_spc) %% NSPF != 0"); 4051558Srgrimes exit(24); 4061558Srgrimes } 4071558Srgrimes if (sblock.fs_cpg < mincpg) { 40837239Sbde printf("cylinder groups must have at least %ld cylinders\n", 4091558Srgrimes mincpg); 4101558Srgrimes exit(25); 4111558Srgrimes } else if (sblock.fs_cpg != cpg) { 4121558Srgrimes if (!cpgflg) 4131558Srgrimes printf("Warning: "); 4141558Srgrimes else if (!mapcramped && !inodecramped) 4151558Srgrimes exit(26); 4161558Srgrimes if (mapcramped && inodecramped) 4171558Srgrimes printf("Block size and bytes per inode restrict"); 4181558Srgrimes else if (mapcramped) 4191558Srgrimes printf("Block size restricts"); 4201558Srgrimes else 4211558Srgrimes printf("Bytes per inode restrict"); 4221558Srgrimes printf(" cylinders per group to %d.\n", sblock.fs_cpg); 4231558Srgrimes if (cpgflg) 4241558Srgrimes exit(27); 4251558Srgrimes } 4261558Srgrimes sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); 4271558Srgrimes /* 4281558Srgrimes * Now have size for file system and nsect and ntrak. 4291558Srgrimes * Determine number of cylinders and blocks in the file system. 4301558Srgrimes */ 4311558Srgrimes sblock.fs_size = fssize = dbtofsb(&sblock, fssize); 4321558Srgrimes sblock.fs_ncyl = fssize * NSPF(&sblock) / sblock.fs_spc; 4331558Srgrimes if (fssize * NSPF(&sblock) > sblock.fs_ncyl * sblock.fs_spc) { 4341558Srgrimes sblock.fs_ncyl++; 4351558Srgrimes warn = 1; 4361558Srgrimes } 4371558Srgrimes if (sblock.fs_ncyl < 1) { 4381558Srgrimes printf("file systems must have at least one cylinder\n"); 4391558Srgrimes exit(28); 4401558Srgrimes } 4411558Srgrimes /* 4421558Srgrimes * Determine feasability/values of rotational layout tables. 4431558Srgrimes * 4441558Srgrimes * The size of the rotational layout tables is limited by the 4451558Srgrimes * size of the superblock, SBSIZE. The amount of space available 4461558Srgrimes * for tables is calculated as (SBSIZE - sizeof (struct fs)). 4471558Srgrimes * The size of these tables is inversely proportional to the block 4481558Srgrimes * size of the file system. The size increases if sectors per track 4491558Srgrimes * are not powers of two, because more cylinders must be described 4501558Srgrimes * by the tables before the rotational pattern repeats (fs_cpc). 4511558Srgrimes */ 4521558Srgrimes sblock.fs_interleave = interleave; 4531558Srgrimes sblock.fs_trackskew = trackskew; 4541558Srgrimes sblock.fs_npsect = nphyssectors; 4551558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 4561558Srgrimes sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); 45732623Sbde if (sblock.fs_sbsize > SBSIZE) 45832623Sbde sblock.fs_sbsize = SBSIZE; 4593467Sdg if (sblock.fs_ntrak == 1) { 4601558Srgrimes sblock.fs_cpc = 0; 4611558Srgrimes goto next; 4621558Srgrimes } 46338579Sdfr postblsize = sblock.fs_nrpos * sblock.fs_cpc * sizeof(int16_t); 4641558Srgrimes rotblsize = sblock.fs_cpc * sblock.fs_spc / NSPB(&sblock); 4651558Srgrimes totalsbsize = sizeof(struct fs) + rotblsize; 4661558Srgrimes if (sblock.fs_nrpos == 8 && sblock.fs_cpc <= 16) { 4671558Srgrimes /* use old static table space */ 4681558Srgrimes sblock.fs_postbloff = (char *)(&sblock.fs_opostbl[0][0]) - 46923682Speter (char *)(&sblock.fs_firstfield); 4701558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 47123682Speter (u_char *)(&sblock.fs_firstfield); 4721558Srgrimes } else { 4731558Srgrimes /* use dynamic table space */ 4741558Srgrimes sblock.fs_postbloff = &sblock.fs_space[0] - 47523682Speter (u_char *)(&sblock.fs_firstfield); 4761558Srgrimes sblock.fs_rotbloff = sblock.fs_postbloff + postblsize; 4771558Srgrimes totalsbsize += postblsize; 4781558Srgrimes } 4791558Srgrimes if (totalsbsize > SBSIZE || 4801558Srgrimes sblock.fs_nsect > (1 << NBBY) * NSPB(&sblock)) { 4811558Srgrimes printf("%s %s %d %s %d.%s", 4821558Srgrimes "Warning: insufficient space in super block for\n", 4831558Srgrimes "rotational layout tables with nsect", sblock.fs_nsect, 4841558Srgrimes "and ntrak", sblock.fs_ntrak, 4851558Srgrimes "\nFile system performance may be impaired.\n"); 4861558Srgrimes sblock.fs_cpc = 0; 4871558Srgrimes goto next; 4881558Srgrimes } 4891558Srgrimes sblock.fs_sbsize = fragroundup(&sblock, totalsbsize); 49032623Sbde if (sblock.fs_sbsize > SBSIZE) 49132623Sbde sblock.fs_sbsize = SBSIZE; 4921558Srgrimes /* 4931558Srgrimes * calculate the available blocks for each rotational position 4941558Srgrimes */ 4951558Srgrimes for (cylno = 0; cylno < sblock.fs_cpc; cylno++) 4961558Srgrimes for (rpos = 0; rpos < sblock.fs_nrpos; rpos++) 4971558Srgrimes fs_postbl(&sblock, cylno)[rpos] = -1; 4981558Srgrimes for (i = (rotblsize - 1) * sblock.fs_frag; 4991558Srgrimes i >= 0; i -= sblock.fs_frag) { 5001558Srgrimes cylno = cbtocylno(&sblock, i); 5011558Srgrimes rpos = cbtorpos(&sblock, i); 5021558Srgrimes blk = fragstoblks(&sblock, i); 5031558Srgrimes if (fs_postbl(&sblock, cylno)[rpos] == -1) 5041558Srgrimes fs_rotbl(&sblock)[blk] = 0; 5051558Srgrimes else 5061558Srgrimes fs_rotbl(&sblock)[blk] = 5071558Srgrimes fs_postbl(&sblock, cylno)[rpos] - blk; 5081558Srgrimes fs_postbl(&sblock, cylno)[rpos] = blk; 5091558Srgrimes } 5101558Srgrimesnext: 5111558Srgrimes /* 5121558Srgrimes * Compute/validate number of cylinder groups. 5131558Srgrimes */ 5141558Srgrimes sblock.fs_ncg = sblock.fs_ncyl / sblock.fs_cpg; 5151558Srgrimes if (sblock.fs_ncyl % sblock.fs_cpg) 5161558Srgrimes sblock.fs_ncg++; 5171558Srgrimes sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); 5181558Srgrimes i = MIN(~sblock.fs_cgmask, sblock.fs_ncg - 1); 5191558Srgrimes if (cgdmin(&sblock, i) - cgbase(&sblock, i) >= sblock.fs_fpg) { 52037239Sbde printf("inode blocks/cyl group (%ld) >= data blocks (%ld)\n", 5211558Srgrimes cgdmin(&sblock, i) - cgbase(&sblock, i) / sblock.fs_frag, 52237239Sbde (long)(sblock.fs_fpg / sblock.fs_frag)); 5231558Srgrimes printf("number of cylinders per cylinder group (%d) %s.\n", 5241558Srgrimes sblock.fs_cpg, "must be increased"); 5251558Srgrimes exit(29); 5261558Srgrimes } 5271558Srgrimes j = sblock.fs_ncg - 1; 5281558Srgrimes if ((i = fssize - j * sblock.fs_fpg) < sblock.fs_fpg && 5291558Srgrimes cgdmin(&sblock, j) - cgbase(&sblock, j) > i) { 5301558Srgrimes if (j == 0) { 5311558Srgrimes printf("Filesystem must have at least %d sectors\n", 5321558Srgrimes NSPF(&sblock) * 5331558Srgrimes (cgdmin(&sblock, 0) + 3 * sblock.fs_frag)); 5341558Srgrimes exit(30); 5351558Srgrimes } 53692532Sbde printf( 53792532Sbde"Warning: inode blocks/cyl group (%ld) >= data blocks (%ld) in last\n", 5381558Srgrimes (cgdmin(&sblock, j) - cgbase(&sblock, j)) / sblock.fs_frag, 5391558Srgrimes i / sblock.fs_frag); 54092532Sbde printf( 54192532Sbde" cylinder group. This implies %ld sector(s) cannot be allocated.\n", 54292532Sbde i * NSPF(&sblock)); 5431558Srgrimes sblock.fs_ncg--; 5441558Srgrimes sblock.fs_ncyl -= sblock.fs_ncyl % sblock.fs_cpg; 5451558Srgrimes sblock.fs_size = fssize = sblock.fs_ncyl * sblock.fs_spc / 5461558Srgrimes NSPF(&sblock); 5471558Srgrimes warn = 0; 5481558Srgrimes } 54977420Sphk if (warn) { 5501558Srgrimes printf("Warning: %d sector(s) in last cylinder unallocated\n", 5511558Srgrimes sblock.fs_spc - 55285860Sphk (fssize * NSPF(&sblock) - (sblock.fs_ncyl - 1) * 55385860Sphk sblock.fs_spc)); 5541558Srgrimes } 5551558Srgrimes /* 5561558Srgrimes * fill in remaining fields of the super block 5571558Srgrimes */ 5581558Srgrimes sblock.fs_csaddr = cgdmin(&sblock, 0); 5591558Srgrimes sblock.fs_cssize = 5601558Srgrimes fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); 56171073Siedowse /* 56271073Siedowse * The superblock fields 'fs_csmask' and 'fs_csshift' are no 56371073Siedowse * longer used. However, we still initialise them so that the 56471073Siedowse * filesystem remains compatible with old kernels. 56571073Siedowse */ 5661558Srgrimes i = sblock.fs_bsize / sizeof(struct csum); 5671558Srgrimes sblock.fs_csmask = ~(i - 1); 56892712Siedowse sblock.fs_csshift = ilog2(i); 5691558Srgrimes fscs = (struct csum *)calloc(1, sblock.fs_cssize); 57037664Scharnier if (fscs == NULL) 57137664Scharnier errx(31, "calloc failed"); 5721558Srgrimes sblock.fs_magic = FS_MAGIC; 5731558Srgrimes sblock.fs_rotdelay = rotdelay; 5741558Srgrimes sblock.fs_minfree = minfree; 5751558Srgrimes sblock.fs_maxcontig = maxcontig; 5761558Srgrimes sblock.fs_maxbpg = maxbpg; 5771558Srgrimes sblock.fs_rps = rpm / 60; 5781558Srgrimes sblock.fs_optim = opt; 5791558Srgrimes sblock.fs_cgrotor = 0; 5801558Srgrimes sblock.fs_cstotal.cs_ndir = 0; 5811558Srgrimes sblock.fs_cstotal.cs_nbfree = 0; 5821558Srgrimes sblock.fs_cstotal.cs_nifree = 0; 5831558Srgrimes sblock.fs_cstotal.cs_nffree = 0; 5841558Srgrimes sblock.fs_fmod = 0; 5851558Srgrimes sblock.fs_ronly = 0; 5862294Sdg sblock.fs_clean = 1; 58724149Sguido sblock.fs_id[0] = (long)utime; 58824215Sache sblock.fs_id[1] = random(); 58924149Sguido 5901558Srgrimes /* 5911558Srgrimes * Dump out summary information about file system. 5921558Srgrimes */ 59377420Sphk printf("%s:\t%d sectors in %d %s of %d tracks, %d sectors\n", 59477420Sphk fsys, sblock.fs_size * NSPF(&sblock), sblock.fs_ncyl, 59577420Sphk "cylinders", sblock.fs_ntrak, sblock.fs_nsect); 5961558Srgrimes#define B2MBFACTOR (1 / (1024.0 * 1024.0)) 59785860Sphk printf("\t%.1fMB in %d cyl groups (%d c/g, %.2fMB/g, %d i/g)%s\n", 59877420Sphk (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, 59977420Sphk sblock.fs_ncg, sblock.fs_cpg, 60077420Sphk (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, 60177420Sphk sblock.fs_ipg, 60277420Sphk sblock.fs_flags & FS_DOSOFTDEP ? " SOFTUPDATES" : ""); 6031558Srgrimes#undef B2MBFACTOR 6041558Srgrimes /* 6051558Srgrimes * Now build the cylinders group blocks and 6061558Srgrimes * then print out indices of cylinder groups. 6071558Srgrimes */ 60877420Sphk printf("super-block backups (for fsck -b #) at:\n"); 60913769Sjoerg i = 0; 61013769Sjoerg width = charsperline(); 6111558Srgrimes for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { 6121558Srgrimes initcg(cylno, utime); 61375904Skris j = snprintf(tmpbuf, sizeof(tmpbuf), " %ld%s", 61450134Sbillf fsbtodb(&sblock, cgsblock(&sblock, cylno)), 61585860Sphk cylno < (sblock.fs_ncg-1) ? "," : ""); 61681980Sbrian if (j < 0) 61781980Sbrian tmpbuf[j = 0] = '\0'; 61837239Sbde if (i + j >= width) { 6191558Srgrimes printf("\n"); 62013769Sjoerg i = 0; 62113769Sjoerg } 62213769Sjoerg i += j; 62313769Sjoerg printf("%s", tmpbuf); 6248218Sdg fflush(stdout); 6251558Srgrimes } 62677420Sphk printf("\n"); 62777420Sphk if (Nflag) 6281558Srgrimes exit(0); 6291558Srgrimes /* 6301558Srgrimes * Now construct the initial file system, 6311558Srgrimes * then write out the super-block. 6321558Srgrimes */ 6331558Srgrimes fsinit(utime); 6341558Srgrimes sblock.fs_time = utime; 6351558Srgrimes wtfs((int)SBOFF / sectorsize, sbsize, (char *)&sblock); 6361558Srgrimes for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) 6371558Srgrimes wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), 6381558Srgrimes sblock.fs_cssize - i < sblock.fs_bsize ? 63985860Sphk sblock.fs_cssize - i : sblock.fs_bsize, 6401558Srgrimes ((char *)fscs) + i); 6418871Srgrimes /* 6421558Srgrimes * Write out the duplicate super blocks 6431558Srgrimes */ 6441558Srgrimes for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 6451558Srgrimes wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), 6461558Srgrimes sbsize, (char *)&sblock); 64767478Sjwd wtfsflush(); 6481558Srgrimes /* 6491558Srgrimes * Update information about this partion in pack 6501558Srgrimes * label, to that it may be updated on disk. 6511558Srgrimes */ 6521558Srgrimes pp->p_fstype = FS_BSDFFS; 6531558Srgrimes pp->p_fsize = sblock.fs_fsize; 6541558Srgrimes pp->p_frag = sblock.fs_frag; 6551558Srgrimes pp->p_cpg = sblock.fs_cpg; 6561558Srgrimes} 6571558Srgrimes 6581558Srgrimes/* 6591558Srgrimes * Initialize a cylinder group. 6601558Srgrimes */ 66137664Scharniervoid 66292711Siedowseinitcg(int cylno, time_t utime) 6631558Srgrimes{ 6641558Srgrimes daddr_t cbase, d, dlower, dupper, dmax, blkno; 66592483Sphk struct csum *cs; 66692710Siedowse long i, j; 6671558Srgrimes 6681558Srgrimes /* 6691558Srgrimes * Determine block bounds for cylinder group. 6701558Srgrimes * Allow space for super block summary information in first 6711558Srgrimes * cylinder group. 6721558Srgrimes */ 6731558Srgrimes cbase = cgbase(&sblock, cylno); 6741558Srgrimes dmax = cbase + sblock.fs_fpg; 6751558Srgrimes if (dmax > sblock.fs_size) 6761558Srgrimes dmax = sblock.fs_size; 6771558Srgrimes dlower = cgsblock(&sblock, cylno) - cbase; 6781558Srgrimes dupper = cgdmin(&sblock, cylno) - cbase; 6791558Srgrimes if (cylno == 0) 6801558Srgrimes dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); 6811558Srgrimes cs = fscs + cylno; 68223682Speter memset(&acg, 0, sblock.fs_cgsize); 6831558Srgrimes acg.cg_time = utime; 6841558Srgrimes acg.cg_magic = CG_MAGIC; 6851558Srgrimes acg.cg_cgx = cylno; 6861558Srgrimes if (cylno == sblock.fs_ncg - 1) 6871558Srgrimes acg.cg_ncyl = sblock.fs_ncyl % sblock.fs_cpg; 6881558Srgrimes else 6891558Srgrimes acg.cg_ncyl = sblock.fs_cpg; 6901558Srgrimes acg.cg_niblk = sblock.fs_ipg; 6911558Srgrimes acg.cg_ndblk = dmax - cbase; 6921558Srgrimes if (sblock.fs_contigsumsize > 0) 6931558Srgrimes acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag; 69423682Speter acg.cg_btotoff = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield); 69538579Sdfr acg.cg_boff = acg.cg_btotoff + sblock.fs_cpg * sizeof(int32_t); 6968871Srgrimes acg.cg_iusedoff = acg.cg_boff + 69738579Sdfr sblock.fs_cpg * sblock.fs_nrpos * sizeof(u_int16_t); 6981558Srgrimes acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, NBBY); 6991558Srgrimes if (sblock.fs_contigsumsize <= 0) { 7001558Srgrimes acg.cg_nextfreeoff = acg.cg_freeoff + 70192532Sbde howmany(sblock.fs_cpg * sblock.fs_spc / NSPF(&sblock), 70292532Sbde NBBY); 7031558Srgrimes } else { 7041558Srgrimes acg.cg_clustersumoff = acg.cg_freeoff + howmany 7051558Srgrimes (sblock.fs_cpg * sblock.fs_spc / NSPF(&sblock), NBBY) - 70638579Sdfr sizeof(u_int32_t); 7071558Srgrimes acg.cg_clustersumoff = 70838579Sdfr roundup(acg.cg_clustersumoff, sizeof(u_int32_t)); 7091558Srgrimes acg.cg_clusteroff = acg.cg_clustersumoff + 71038579Sdfr (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 7111558Srgrimes acg.cg_nextfreeoff = acg.cg_clusteroff + howmany 7121558Srgrimes (sblock.fs_cpg * sblock.fs_spc / NSPB(&sblock), NBBY); 7131558Srgrimes } 71492532Sbde if (acg.cg_nextfreeoff - (long)(&acg.cg_firstfield) > 71592532Sbde sblock.fs_cgsize) { 7161558Srgrimes printf("Panic: cylinder group too big\n"); 7171558Srgrimes exit(37); 7181558Srgrimes } 7191558Srgrimes acg.cg_cs.cs_nifree += sblock.fs_ipg; 7201558Srgrimes if (cylno == 0) 7211558Srgrimes for (i = 0; i < ROOTINO; i++) { 7221558Srgrimes setbit(cg_inosused(&acg), i); 7231558Srgrimes acg.cg_cs.cs_nifree--; 7241558Srgrimes } 72524149Sguido for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) { 72624149Sguido for (j = 0; j < sblock.fs_bsize / sizeof(struct dinode); j++) 72724215Sache zino[j].di_gen = random(); 7281558Srgrimes wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), 7291558Srgrimes sblock.fs_bsize, (char *)zino); 73024149Sguido } 7311558Srgrimes if (cylno > 0) { 7321558Srgrimes /* 7331558Srgrimes * In cylno 0, beginning space is reserved 7341558Srgrimes * for boot and super blocks. 7351558Srgrimes */ 7361558Srgrimes for (d = 0; d < dlower; d += sblock.fs_frag) { 7371558Srgrimes blkno = d / sblock.fs_frag; 7381558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 7391558Srgrimes if (sblock.fs_contigsumsize > 0) 7401558Srgrimes setbit(cg_clustersfree(&acg), blkno); 7411558Srgrimes acg.cg_cs.cs_nbfree++; 7421558Srgrimes cg_blktot(&acg)[cbtocylno(&sblock, d)]++; 7431558Srgrimes cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) 7441558Srgrimes [cbtorpos(&sblock, d)]++; 7451558Srgrimes } 7461558Srgrimes sblock.fs_dsize += dlower; 7471558Srgrimes } 7481558Srgrimes sblock.fs_dsize += acg.cg_ndblk - dupper; 74937664Scharnier if ((i = dupper % sblock.fs_frag)) { 7501558Srgrimes acg.cg_frsum[sblock.fs_frag - i]++; 7511558Srgrimes for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { 7521558Srgrimes setbit(cg_blksfree(&acg), dupper); 7531558Srgrimes acg.cg_cs.cs_nffree++; 7541558Srgrimes } 7551558Srgrimes } 75685860Sphk for (d = dupper; d + sblock.fs_frag <= dmax - cbase;) { 7571558Srgrimes blkno = d / sblock.fs_frag; 7581558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 7591558Srgrimes if (sblock.fs_contigsumsize > 0) 7601558Srgrimes setbit(cg_clustersfree(&acg), blkno); 7611558Srgrimes acg.cg_cs.cs_nbfree++; 7621558Srgrimes cg_blktot(&acg)[cbtocylno(&sblock, d)]++; 7631558Srgrimes cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) 7641558Srgrimes [cbtorpos(&sblock, d)]++; 7651558Srgrimes d += sblock.fs_frag; 7661558Srgrimes } 7671558Srgrimes if (d < dmax - cbase) { 7681558Srgrimes acg.cg_frsum[dmax - cbase - d]++; 7691558Srgrimes for (; d < dmax - cbase; d++) { 7701558Srgrimes setbit(cg_blksfree(&acg), d); 7711558Srgrimes acg.cg_cs.cs_nffree++; 7721558Srgrimes } 7731558Srgrimes } 7741558Srgrimes if (sblock.fs_contigsumsize > 0) { 77523682Speter int32_t *sump = cg_clustersum(&acg); 7761558Srgrimes u_char *mapp = cg_clustersfree(&acg); 7771558Srgrimes int map = *mapp++; 7781558Srgrimes int bit = 1; 7791558Srgrimes int run = 0; 7801558Srgrimes 7811558Srgrimes for (i = 0; i < acg.cg_nclusterblks; i++) { 78285860Sphk if ((map & bit) != 0) 7831558Srgrimes run++; 78485860Sphk else if (run != 0) { 7851558Srgrimes if (run > sblock.fs_contigsumsize) 7861558Srgrimes run = sblock.fs_contigsumsize; 7871558Srgrimes sump[run]++; 7881558Srgrimes run = 0; 7891558Srgrimes } 79085860Sphk if ((i & (NBBY - 1)) != NBBY - 1) 7911558Srgrimes bit <<= 1; 79285860Sphk else { 7931558Srgrimes map = *mapp++; 7941558Srgrimes bit = 1; 7951558Srgrimes } 7961558Srgrimes } 7971558Srgrimes if (run != 0) { 7981558Srgrimes if (run > sblock.fs_contigsumsize) 7991558Srgrimes run = sblock.fs_contigsumsize; 8001558Srgrimes sump[run]++; 8011558Srgrimes } 8021558Srgrimes } 8031558Srgrimes sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir; 8041558Srgrimes sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree; 8051558Srgrimes sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree; 8061558Srgrimes sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree; 8071558Srgrimes *cs = acg.cg_cs; 8081558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), 8091558Srgrimes sblock.fs_bsize, (char *)&acg); 8101558Srgrimes} 8111558Srgrimes 8121558Srgrimes/* 8131558Srgrimes * initialize the file system 8141558Srgrimes */ 8151558Srgrimesstruct dinode node; 8161558Srgrimes 8171558Srgrimes#ifdef LOSTDIR 8181558Srgrimes#define PREDEFDIR 3 8191558Srgrimes#else 8201558Srgrimes#define PREDEFDIR 2 8211558Srgrimes#endif 8221558Srgrimes 8231558Srgrimesstruct direct root_dir[] = { 8241558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 1, "." }, 8251558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 8261558Srgrimes#ifdef LOSTDIR 8271558Srgrimes { LOSTFOUNDINO, sizeof(struct direct), DT_DIR, 10, "lost+found" }, 8281558Srgrimes#endif 8291558Srgrimes}; 8301558Srgrimesstruct odirect { 8311558Srgrimes u_long d_ino; 8321558Srgrimes u_short d_reclen; 8331558Srgrimes u_short d_namlen; 8341558Srgrimes u_char d_name[MAXNAMLEN + 1]; 8351558Srgrimes} oroot_dir[] = { 8361558Srgrimes { ROOTINO, sizeof(struct direct), 1, "." }, 8371558Srgrimes { ROOTINO, sizeof(struct direct), 2, ".." }, 8381558Srgrimes#ifdef LOSTDIR 8391558Srgrimes { LOSTFOUNDINO, sizeof(struct direct), 10, "lost+found" }, 8401558Srgrimes#endif 8411558Srgrimes}; 8421558Srgrimes#ifdef LOSTDIR 8431558Srgrimesstruct direct lost_found_dir[] = { 8441558Srgrimes { LOSTFOUNDINO, sizeof(struct direct), DT_DIR, 1, "." }, 8451558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 8461558Srgrimes { 0, DIRBLKSIZ, 0, 0, 0 }, 8471558Srgrimes}; 8481558Srgrimesstruct odirect olost_found_dir[] = { 8491558Srgrimes { LOSTFOUNDINO, sizeof(struct direct), 1, "." }, 8501558Srgrimes { ROOTINO, sizeof(struct direct), 2, ".." }, 8511558Srgrimes { 0, DIRBLKSIZ, 0, 0 }, 8521558Srgrimes}; 8531558Srgrimes#endif 8541558Srgrimeschar buf[MAXBSIZE]; 8551558Srgrimes 85637664Scharniervoid 85792711Siedowsefsinit(time_t utime) 8581558Srgrimes{ 85937664Scharnier#ifdef LOSTDIR 8601558Srgrimes int i; 86137664Scharnier#endif 8621558Srgrimes 8631558Srgrimes /* 8641558Srgrimes * initialize the node 8651558Srgrimes */ 86623682Speter node.di_atime = utime; 86723682Speter node.di_mtime = utime; 86823682Speter node.di_ctime = utime; 8691558Srgrimes#ifdef LOSTDIR 8701558Srgrimes /* 8711558Srgrimes * create the lost+found directory 8721558Srgrimes */ 8731558Srgrimes if (Oflag) { 8741558Srgrimes (void)makedir((struct direct *)olost_found_dir, 2); 8751558Srgrimes for (i = DIRBLKSIZ; i < sblock.fs_bsize; i += DIRBLKSIZ) 87623682Speter memmove(&buf[i], &olost_found_dir[2], 8771558Srgrimes DIRSIZ(0, &olost_found_dir[2])); 8781558Srgrimes } else { 8791558Srgrimes (void)makedir(lost_found_dir, 2); 8801558Srgrimes for (i = DIRBLKSIZ; i < sblock.fs_bsize; i += DIRBLKSIZ) 88123682Speter memmove(&buf[i], &lost_found_dir[2], 8821558Srgrimes DIRSIZ(0, &lost_found_dir[2])); 8831558Srgrimes } 8841558Srgrimes node.di_mode = IFDIR | UMASK; 8851558Srgrimes node.di_nlink = 2; 8861558Srgrimes node.di_size = sblock.fs_bsize; 8871558Srgrimes node.di_db[0] = alloc(node.di_size, node.di_mode); 8881558Srgrimes node.di_blocks = btodb(fragroundup(&sblock, node.di_size)); 8891558Srgrimes wtfs(fsbtodb(&sblock, node.di_db[0]), node.di_size, buf); 8901558Srgrimes iput(&node, LOSTFOUNDINO); 8911558Srgrimes#endif 8921558Srgrimes /* 8931558Srgrimes * create the root directory 8941558Srgrimes */ 89577420Sphk node.di_mode = IFDIR | UMASK; 8961558Srgrimes node.di_nlink = PREDEFDIR; 8971558Srgrimes if (Oflag) 8981558Srgrimes node.di_size = makedir((struct direct *)oroot_dir, PREDEFDIR); 8991558Srgrimes else 9001558Srgrimes node.di_size = makedir(root_dir, PREDEFDIR); 9011558Srgrimes node.di_db[0] = alloc(sblock.fs_fsize, node.di_mode); 9021558Srgrimes node.di_blocks = btodb(fragroundup(&sblock, node.di_size)); 9031558Srgrimes wtfs(fsbtodb(&sblock, node.di_db[0]), sblock.fs_fsize, buf); 9041558Srgrimes iput(&node, ROOTINO); 9051558Srgrimes} 9061558Srgrimes 9071558Srgrimes/* 9081558Srgrimes * construct a set of directory entries in "buf". 9091558Srgrimes * return size of directory. 9101558Srgrimes */ 91137664Scharnierint 91292711Siedowsemakedir(struct direct *protodir, int entries) 9131558Srgrimes{ 9141558Srgrimes char *cp; 9151558Srgrimes int i, spcleft; 9161558Srgrimes 9171558Srgrimes spcleft = DIRBLKSIZ; 9181558Srgrimes for (cp = buf, i = 0; i < entries - 1; i++) { 9191558Srgrimes protodir[i].d_reclen = DIRSIZ(0, &protodir[i]); 92023682Speter memmove(cp, &protodir[i], protodir[i].d_reclen); 9211558Srgrimes cp += protodir[i].d_reclen; 9221558Srgrimes spcleft -= protodir[i].d_reclen; 9231558Srgrimes } 9241558Srgrimes protodir[i].d_reclen = spcleft; 92523682Speter memmove(cp, &protodir[i], DIRSIZ(0, &protodir[i])); 9261558Srgrimes return (DIRBLKSIZ); 9271558Srgrimes} 9281558Srgrimes 9291558Srgrimes/* 9301558Srgrimes * allocate a block or frag 9311558Srgrimes */ 9321558Srgrimesdaddr_t 93392711Siedowsealloc(int size, int mode) 9341558Srgrimes{ 9351558Srgrimes int i, frag; 9361558Srgrimes daddr_t d, blkno; 9371558Srgrimes 9381558Srgrimes rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 9391558Srgrimes (char *)&acg); 9401558Srgrimes if (acg.cg_magic != CG_MAGIC) { 9411558Srgrimes printf("cg 0: bad magic number\n"); 9421558Srgrimes return (0); 9431558Srgrimes } 9441558Srgrimes if (acg.cg_cs.cs_nbfree == 0) { 9451558Srgrimes printf("first cylinder group ran out of space\n"); 9461558Srgrimes return (0); 9471558Srgrimes } 9481558Srgrimes for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) 9491558Srgrimes if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) 9501558Srgrimes goto goth; 9511558Srgrimes printf("internal error: can't find block in cyl 0\n"); 9521558Srgrimes return (0); 9531558Srgrimesgoth: 9541558Srgrimes blkno = fragstoblks(&sblock, d); 9551558Srgrimes clrblock(&sblock, cg_blksfree(&acg), blkno); 95623682Speter if (sblock.fs_contigsumsize > 0) 95723682Speter clrbit(cg_clustersfree(&acg), blkno); 9581558Srgrimes acg.cg_cs.cs_nbfree--; 9591558Srgrimes sblock.fs_cstotal.cs_nbfree--; 9601558Srgrimes fscs[0].cs_nbfree--; 9611558Srgrimes if (mode & IFDIR) { 9621558Srgrimes acg.cg_cs.cs_ndir++; 9631558Srgrimes sblock.fs_cstotal.cs_ndir++; 9641558Srgrimes fscs[0].cs_ndir++; 9651558Srgrimes } 9661558Srgrimes cg_blktot(&acg)[cbtocylno(&sblock, d)]--; 9671558Srgrimes cg_blks(&sblock, &acg, cbtocylno(&sblock, d))[cbtorpos(&sblock, d)]--; 9681558Srgrimes if (size != sblock.fs_bsize) { 9691558Srgrimes frag = howmany(size, sblock.fs_fsize); 9701558Srgrimes fscs[0].cs_nffree += sblock.fs_frag - frag; 9711558Srgrimes sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; 9721558Srgrimes acg.cg_cs.cs_nffree += sblock.fs_frag - frag; 9731558Srgrimes acg.cg_frsum[sblock.fs_frag - frag]++; 9741558Srgrimes for (i = frag; i < sblock.fs_frag; i++) 9751558Srgrimes setbit(cg_blksfree(&acg), d + i); 9761558Srgrimes } 9771558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 9781558Srgrimes (char *)&acg); 9791558Srgrimes return (d); 9801558Srgrimes} 9811558Srgrimes 9821558Srgrimes/* 98323682Speter * Calculate number of inodes per group. 98423682Speter */ 98523682Speterlong 98692711Siedowsecalcipg(long cpg, long bpcg, off_t *usedbp) 98723682Speter{ 98823682Speter int i; 98923682Speter long ipg, new_ipg, ncg, ncyl; 99023682Speter off_t usedb; 99123682Speter 99223682Speter /* 99323682Speter * Prepare to scale by fssize / (number of sectors in cylinder groups). 99423682Speter * Note that fssize is still in sectors, not filesystem blocks. 99523682Speter */ 99636498Sbde ncyl = howmany(fssize, (u_int)secpercyl); 99723682Speter ncg = howmany(ncyl, cpg); 99823682Speter /* 99923682Speter * Iterate a few times to allow for ipg depending on itself. 100023682Speter */ 100123682Speter ipg = 0; 100223682Speter for (i = 0; i < 10; i++) { 100385860Sphk usedb = (sblock.fs_iblkno + ipg / INOPF(&sblock)) * 100485860Sphk NSPF(&sblock) * (off_t)sectorsize; 100585860Sphk new_ipg = (cpg * (quad_t)bpcg - usedb) / density * 100685860Sphk fssize / ncg / secpercyl / cpg; 100723682Speter new_ipg = roundup(new_ipg, INOPB(&sblock)); 100823682Speter if (new_ipg == ipg) 100923682Speter break; 101023682Speter ipg = new_ipg; 101123682Speter } 101223682Speter *usedbp = usedb; 101323682Speter return (ipg); 101423682Speter} 101523682Speter 101623682Speter/* 10171558Srgrimes * Allocate an inode on the disk 10181558Srgrimes */ 101937664Scharniervoid 102092711Siedowseiput(struct dinode *ip, ino_t ino) 10211558Srgrimes{ 10221558Srgrimes struct dinode buf[MAXINOPB]; 10231558Srgrimes daddr_t d; 10241558Srgrimes int c; 10251558Srgrimes 102624215Sache ip->di_gen = random(); 10271558Srgrimes c = ino_to_cg(&sblock, ino); 10281558Srgrimes rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 10291558Srgrimes (char *)&acg); 10301558Srgrimes if (acg.cg_magic != CG_MAGIC) { 10311558Srgrimes printf("cg 0: bad magic number\n"); 10321558Srgrimes exit(31); 10331558Srgrimes } 10341558Srgrimes acg.cg_cs.cs_nifree--; 10351558Srgrimes setbit(cg_inosused(&acg), ino); 10361558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 10371558Srgrimes (char *)&acg); 10381558Srgrimes sblock.fs_cstotal.cs_nifree--; 10391558Srgrimes fscs[0].cs_nifree--; 10401558Srgrimes if (ino >= sblock.fs_ipg * sblock.fs_ncg) { 10411558Srgrimes printf("fsinit: inode value out of range (%d).\n", ino); 10421558Srgrimes exit(32); 10431558Srgrimes } 10441558Srgrimes d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino)); 104537664Scharnier rdfs(d, sblock.fs_bsize, (char *)buf); 10461558Srgrimes buf[ino_to_fsbo(&sblock, ino)] = *ip; 104737664Scharnier wtfs(d, sblock.fs_bsize, (char *)buf); 10481558Srgrimes} 10491558Srgrimes 10501558Srgrimes/* 10511558Srgrimes * read a block from the file system 10521558Srgrimes */ 105337664Scharniervoid 105492711Siedowserdfs(daddr_t bno, int size, char *bf) 10551558Srgrimes{ 10561558Srgrimes int n; 10571558Srgrimes 105867478Sjwd wtfsflush(); 10591558Srgrimes if (lseek(fsi, (off_t)bno * sectorsize, 0) < 0) { 106037239Sbde printf("seek error: %ld\n", (long)bno); 106137664Scharnier err(33, "rdfs"); 10621558Srgrimes } 10631558Srgrimes n = read(fsi, bf, size); 10641558Srgrimes if (n != size) { 106537239Sbde printf("read error: %ld\n", (long)bno); 106637664Scharnier err(34, "rdfs"); 10671558Srgrimes } 10681558Srgrimes} 10691558Srgrimes 107067239Speter#define WCSIZE (128 * 1024) 107167239Speterdaddr_t wc_sect; /* units of sectorsize */ 107267239Speterint wc_end; /* bytes */ 107367239Speterstatic char wc[WCSIZE]; /* bytes */ 107467239Speter 10751558Srgrimes/* 107667478Sjwd * Flush dirty write behind buffer. 107767478Sjwd */ 107867478Sjwdvoid 107967478Sjwdwtfsflush() 108067478Sjwd{ 108167478Sjwd int n; 108267478Sjwd if (wc_end) { 108367478Sjwd if (lseek(fso, (off_t)wc_sect * sectorsize, SEEK_SET) < 0) { 108467478Sjwd printf("seek error: %ld\n", (long)wc_sect); 108567478Sjwd err(35, "wtfs - writecombine"); 108667478Sjwd } 108767478Sjwd n = write(fso, wc, wc_end); 108867478Sjwd if (n != wc_end) { 108967478Sjwd printf("write error: %ld\n", (long)wc_sect); 109067478Sjwd err(36, "wtfs - writecombine"); 109167478Sjwd } 109267478Sjwd wc_end = 0; 109367478Sjwd } 109467478Sjwd} 109567478Sjwd 109667478Sjwd/* 10971558Srgrimes * write a block to the file system 10981558Srgrimes */ 109937664Scharniervoid 110092711Siedowsewtfs(daddr_t bno, int size, char *bf) 11011558Srgrimes{ 110292711Siedowse int done, n; 11031558Srgrimes 11041558Srgrimes if (Nflag) 11051558Srgrimes return; 110667239Speter done = 0; 110767239Speter if (wc_end == 0 && size <= WCSIZE) { 110867239Speter wc_sect = bno; 110967239Speter bcopy(bf, wc, size); 111067239Speter wc_end = size; 111167239Speter if (wc_end < WCSIZE) 111267239Speter return; 111367239Speter done = 1; 111467239Speter } 111567479Sjwd if ((off_t)wc_sect * sectorsize + wc_end == (off_t)bno * sectorsize && 111667239Speter wc_end + size <= WCSIZE) { 111767239Speter bcopy(bf, wc + wc_end, size); 111867239Speter wc_end += size; 111967239Speter if (wc_end < WCSIZE) 112067239Speter return; 112167239Speter done = 1; 112267239Speter } 112367478Sjwd wtfsflush(); 112467239Speter if (done) 112567239Speter return; 11261558Srgrimes if (lseek(fso, (off_t)bno * sectorsize, SEEK_SET) < 0) { 112737239Sbde printf("seek error: %ld\n", (long)bno); 112837664Scharnier err(35, "wtfs"); 11291558Srgrimes } 11301558Srgrimes n = write(fso, bf, size); 11311558Srgrimes if (n != size) { 113237239Sbde printf("write error: %ld\n", (long)bno); 113337664Scharnier err(36, "wtfs"); 11341558Srgrimes } 11351558Srgrimes} 11361558Srgrimes 11371558Srgrimes/* 11381558Srgrimes * check if a block is available 11391558Srgrimes */ 114037664Scharnierint 114192711Siedowseisblock(struct fs *fs, unsigned char *cp, int h) 11421558Srgrimes{ 11431558Srgrimes unsigned char mask; 11441558Srgrimes 11451558Srgrimes switch (fs->fs_frag) { 11461558Srgrimes case 8: 11471558Srgrimes return (cp[h] == 0xff); 11481558Srgrimes case 4: 11491558Srgrimes mask = 0x0f << ((h & 0x1) << 2); 11501558Srgrimes return ((cp[h >> 1] & mask) == mask); 11511558Srgrimes case 2: 11521558Srgrimes mask = 0x03 << ((h & 0x3) << 1); 11531558Srgrimes return ((cp[h >> 2] & mask) == mask); 11541558Srgrimes case 1: 11551558Srgrimes mask = 0x01 << (h & 0x7); 11561558Srgrimes return ((cp[h >> 3] & mask) == mask); 11571558Srgrimes default: 11581558Srgrimes fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); 11591558Srgrimes return (0); 11601558Srgrimes } 11611558Srgrimes} 11621558Srgrimes 11631558Srgrimes/* 11641558Srgrimes * take a block out of the map 11651558Srgrimes */ 116637664Scharniervoid 116792711Siedowseclrblock(struct fs *fs, unsigned char *cp, int h) 11681558Srgrimes{ 11691558Srgrimes switch ((fs)->fs_frag) { 11701558Srgrimes case 8: 11711558Srgrimes cp[h] = 0; 11721558Srgrimes return; 11731558Srgrimes case 4: 11741558Srgrimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 11751558Srgrimes return; 11761558Srgrimes case 2: 11771558Srgrimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 11781558Srgrimes return; 11791558Srgrimes case 1: 11801558Srgrimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 11811558Srgrimes return; 11821558Srgrimes default: 11831558Srgrimes fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); 11841558Srgrimes return; 11851558Srgrimes } 11861558Srgrimes} 11871558Srgrimes 11881558Srgrimes/* 11891558Srgrimes * put a block into the map 11901558Srgrimes */ 119137664Scharniervoid 119292711Siedowsesetblock(struct fs *fs, unsigned char *cp, int h) 11931558Srgrimes{ 11941558Srgrimes switch (fs->fs_frag) { 11951558Srgrimes case 8: 11961558Srgrimes cp[h] = 0xff; 11971558Srgrimes return; 11981558Srgrimes case 4: 11991558Srgrimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 12001558Srgrimes return; 12011558Srgrimes case 2: 12021558Srgrimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 12031558Srgrimes return; 12041558Srgrimes case 1: 12051558Srgrimes cp[h >> 3] |= (0x01 << (h & 0x7)); 12061558Srgrimes return; 12071558Srgrimes default: 12081558Srgrimes fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); 12091558Srgrimes return; 12101558Srgrimes } 12111558Srgrimes} 121213637Sjoerg 121313637Sjoerg/* 121413769Sjoerg * Determine the number of characters in a 121513637Sjoerg * single line. 121613637Sjoerg */ 121713637Sjoerg 121813637Sjoergstatic int 121913769Sjoergcharsperline() 122013637Sjoerg{ 122113769Sjoerg int columns; 122213637Sjoerg char *cp; 122313637Sjoerg struct winsize ws; 122413637Sjoerg 122513637Sjoerg columns = 0; 122613637Sjoerg if (ioctl(0, TIOCGWINSZ, &ws) != -1) 122713637Sjoerg columns = ws.ws_col; 122813637Sjoerg if (columns == 0 && (cp = getenv("COLUMNS"))) 122913637Sjoerg columns = atoi(cp); 123013637Sjoerg if (columns == 0) 123113637Sjoerg columns = 80; /* last resort */ 123285860Sphk return (columns); 123313637Sjoerg} 123492712Siedowse 123592712Siedowsestatic int 123692712Siedowseilog2(int val) 123792712Siedowse{ 123892712Siedowse int n; 123992712Siedowse 124092712Siedowse for (n = 0; n < sizeof(n) * NBBY; n++) 124192712Siedowse if (1 << n == val) 124292712Siedowse return (n); 124392712Siedowse errx(1, "ilog2: %d is not a power of 2\n", val); 124492712Siedowse} 1245