mkfs.c revision 111268
11558Srgrimes/* 298542Smckusick * Copyright (c) 2002 Networks Associates Technology, Inc. 398542Smckusick * All rights reserved. 498542Smckusick * 598542Smckusick * This software was developed for the FreeBSD Project by Marshall 698542Smckusick * Kirk McKusick and Network Associates Laboratories, the Security 798542Smckusick * Research Division of Network Associates, Inc. under DARPA/SPAWAR 898542Smckusick * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 9110884Smckusick * research program. 1098542Smckusick * 111558Srgrimes * Copyright (c) 1980, 1989, 1993 121558Srgrimes * The Regents of the University of California. All rights reserved. 131558Srgrimes * 141558Srgrimes * Redistribution and use in source and binary forms, with or without 151558Srgrimes * modification, are permitted provided that the following conditions 161558Srgrimes * are met: 171558Srgrimes * 1. Redistributions of source code must retain the above copyright 181558Srgrimes * notice, this list of conditions and the following disclaimer. 191558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 201558Srgrimes * notice, this list of conditions and the following disclaimer in the 211558Srgrimes * documentation and/or other materials provided with the distribution. 221558Srgrimes * 3. All advertising materials mentioning features or use of this software 231558Srgrimes * must display the following acknowledgement: 241558Srgrimes * This product includes software developed by the University of 251558Srgrimes * California, Berkeley and its contributors. 261558Srgrimes * 4. Neither the name of the University nor the names of its contributors 271558Srgrimes * may be used to endorse or promote products derived from this software 281558Srgrimes * without specific prior written permission. 291558Srgrimes * 301558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 311558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 321558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 331558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 341558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 351558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 361558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 371558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 381558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 391558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 401558Srgrimes * SUCH DAMAGE. 411558Srgrimes */ 421558Srgrimes 431558Srgrimes#ifndef lint 4437664Scharnier#if 0 4523682Speterstatic char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95"; 4637664Scharnier#endif 4737664Scharnierstatic const char rcsid[] = 4850476Speter "$FreeBSD: head/sbin/newfs/mkfs.c 111268 2003-02-22 23:26:11Z mckusick $"; 491558Srgrimes#endif /* not lint */ 501558Srgrimes 5137664Scharnier#include <err.h> 52103949Smike#include <limits.h> 5337664Scharnier#include <signal.h> 5492709Siedowse#include <stdlib.h> 5537664Scharnier#include <string.h> 5699796Sbde#include <stdint.h> 5737664Scharnier#include <stdio.h> 581558Srgrimes#include <unistd.h> 591558Srgrimes#include <sys/param.h> 601558Srgrimes#include <sys/time.h> 6137664Scharnier#include <sys/types.h> 621558Srgrimes#include <sys/wait.h> 631558Srgrimes#include <sys/resource.h> 6443804Sdillon#include <sys/stat.h> 651558Srgrimes#include <ufs/ufs/dinode.h> 661558Srgrimes#include <ufs/ufs/dir.h> 671558Srgrimes#include <ufs/ffs/fs.h> 681558Srgrimes#include <sys/disklabel.h> 693550Sphk#include <sys/file.h> 703550Sphk#include <sys/mman.h> 7113637Sjoerg#include <sys/ioctl.h> 7292717Sphk#include "newfs.h" 731558Srgrimes 741558Srgrimes/* 75102231Strhodes * make file system for cylinder-group style file systems 761558Srgrimes */ 771558Srgrimes#define UMASK 0755 781558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 791558Srgrimes 8092717Sphkstatic struct csum *fscs; 81110671Sjmallett#define sblock disk.d_fs 82110671Sjmallett#define acg disk.d_cg 831558Srgrimes 8498542Smckusickunion dinode { 8598542Smckusick struct ufs1_dinode dp1; 8698542Smckusick struct ufs2_dinode dp2; 8798542Smckusick}; 8898542Smckusick#define DIP(dp, field) \ 8998542Smckusick ((sblock.fs_magic == FS_UFS1_MAGIC) ? \ 9098542Smckusick (dp)->dp1.field : (dp)->dp2.field) 911558Srgrimes 9298542Smckusickstatic caddr_t iobuf; 9398542Smckusickstatic long iobufsize; 9498542Smckusickstatic ufs2_daddr_t alloc(int size, int mode); 9592717Sphkstatic int charsperline(void); 9693775Sbdestatic void clrblock(struct fs *, unsigned char *, int); 9793775Sbdestatic void fsinit(time_t); 9892712Siedowsestatic int ilog2(int); 9993775Sbdestatic void initcg(int, time_t); 10093775Sbdestatic int isblock(struct fs *, unsigned char *, int); 10198542Smckusickstatic void iput(union dinode *, ino_t); 10293775Sbdestatic int makedir(struct direct *, int); 10393775Sbdestatic void setblock(struct fs *, unsigned char *, int); 10498542Smckusickstatic void wtfs(ufs2_daddr_t, int, char *); 105111268Smckusickstatic u_int32_t newfs_random(void); 1061558Srgrimes 10737664Scharniervoid 10895357Sphkmkfs(struct partition *pp, char *fsys) 1091558Srgrimes{ 11098542Smckusick int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg; 11198542Smckusick long i, j, cylno, csfrags; 1121558Srgrimes time_t utime; 1131558Srgrimes quad_t sizepb; 11413769Sjoerg int width; 11513769Sjoerg char tmpbuf[100]; /* XXX this will break in about 2,500 years */ 1161558Srgrimes 117110671Sjmallett /* 118110671Sjmallett * Our blocks == sector size, and the version of UFS we are using is 119110671Sjmallett * specified by Oflag. 120110671Sjmallett */ 121110671Sjmallett disk.d_bsize = sectorsize; 122110671Sjmallett disk.d_ufs = Oflag; 123111268Smckusick if (Rflag) { 12492722Sphk utime = 1000000000; 125111268Smckusick } else { 12692722Sphk time(&utime); 127110885Smckusick arc4random_stir(); 12824215Sache } 129107294Smckusick sblock.fs_old_flags = FS_FLAGS_UPDATED; 13098542Smckusick sblock.fs_flags = 0; 13175124Sbde if (Uflag) 13275078Sobrien sblock.fs_flags |= FS_DOSOFTDEP; 133110174Sgordon if (Lflag) 134110174Sgordon strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN); 1351558Srgrimes /* 136102231Strhodes * Validate the given file system size. 1371558Srgrimes * Verify that its last block can actually be accessed. 138102231Strhodes * Convert to file system fragment sized units. 1391558Srgrimes */ 14098542Smckusick if (fssize <= 0) { 14199796Sbde printf("preposterous size %jd\n", (intmax_t)fssize); 14298542Smckusick exit(13); 14398542Smckusick } 14420061Ssos wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize, 14592532Sbde (char *)&sblock); 1461558Srgrimes /* 147102231Strhodes * collect and verify the file system density info 14875377Smckusick */ 14975377Smckusick sblock.fs_avgfilesize = avgfilesize; 15075377Smckusick sblock.fs_avgfpdir = avgfilesperdir; 15175377Smckusick if (sblock.fs_avgfilesize <= 0) 15275377Smckusick printf("illegal expected average file size %d\n", 15375377Smckusick sblock.fs_avgfilesize), exit(14); 15475377Smckusick if (sblock.fs_avgfpdir <= 0) 15575377Smckusick printf("illegal expected number of files per directory %d\n", 15675377Smckusick sblock.fs_avgfpdir), exit(15); 15775377Smckusick /* 1581558Srgrimes * collect and verify the block and fragment sizes 1591558Srgrimes */ 1601558Srgrimes sblock.fs_bsize = bsize; 1611558Srgrimes sblock.fs_fsize = fsize; 1621558Srgrimes if (!POWEROF2(sblock.fs_bsize)) { 1631558Srgrimes printf("block size must be a power of 2, not %d\n", 1641558Srgrimes sblock.fs_bsize); 1651558Srgrimes exit(16); 1661558Srgrimes } 1671558Srgrimes if (!POWEROF2(sblock.fs_fsize)) { 1681558Srgrimes printf("fragment size must be a power of 2, not %d\n", 1691558Srgrimes sblock.fs_fsize); 1701558Srgrimes exit(17); 1711558Srgrimes } 1721558Srgrimes if (sblock.fs_fsize < sectorsize) { 17393775Sbde printf("increasing fragment size from %d to sector size (%d)\n", 1741558Srgrimes sblock.fs_fsize, sectorsize); 17593737Sphk sblock.fs_fsize = sectorsize; 1761558Srgrimes } 177107412Smckusick if (sblock.fs_bsize > MAXBSIZE) { 178107412Smckusick printf("decreasing block size from %d to maximum (%d)\n", 179107412Smckusick sblock.fs_bsize, MAXBSIZE); 180107412Smckusick sblock.fs_bsize = MAXBSIZE; 181107412Smckusick } 1821558Srgrimes if (sblock.fs_bsize < MINBSIZE) { 18393737Sphk printf("increasing block size from %d to minimum (%d)\n", 1841558Srgrimes sblock.fs_bsize, MINBSIZE); 18593737Sphk sblock.fs_bsize = MINBSIZE; 1861558Srgrimes } 187107412Smckusick if (sblock.fs_fsize > MAXBSIZE) { 188107412Smckusick printf("decreasing fragment size from %d to maximum (%d)\n", 189107412Smckusick sblock.fs_fsize, MAXBSIZE); 190107412Smckusick sblock.fs_fsize = MAXBSIZE; 191107412Smckusick } 1921558Srgrimes if (sblock.fs_bsize < sblock.fs_fsize) { 19393775Sbde printf("increasing block size from %d to fragment size (%d)\n", 19492532Sbde sblock.fs_bsize, sblock.fs_fsize); 19593737Sphk sblock.fs_bsize = sblock.fs_fsize; 1961558Srgrimes } 19793737Sphk if (sblock.fs_fsize * MAXFRAG < sblock.fs_bsize) { 19893775Sbde printf( 19993775Sbde "increasing fragment size from %d to block size / %d (%d)\n", 20093737Sphk sblock.fs_fsize, MAXFRAG, sblock.fs_bsize / MAXFRAG); 20193737Sphk sblock.fs_fsize = sblock.fs_bsize / MAXFRAG; 20293737Sphk } 20398542Smckusick if (maxbsize < bsize || !POWEROF2(maxbsize)) { 20498542Smckusick sblock.fs_maxbsize = sblock.fs_bsize; 20598542Smckusick printf("Extent size set to %d\n", sblock.fs_maxbsize); 20698542Smckusick } else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) { 20798542Smckusick sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize; 20898542Smckusick printf("Extent size reduced to %d\n", sblock.fs_maxbsize); 20998542Smckusick } else { 21098542Smckusick sblock.fs_maxbsize = maxbsize; 21198542Smckusick } 21298542Smckusick sblock.fs_maxcontig = maxcontig; 21398542Smckusick if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) { 21498542Smckusick sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize; 21598542Smckusick printf("Maxcontig raised to %d\n", sblock.fs_maxbsize); 21698542Smckusick } 21798542Smckusick if (sblock.fs_maxcontig > 1) 21898542Smckusick sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG); 2191558Srgrimes sblock.fs_bmask = ~(sblock.fs_bsize - 1); 2201558Srgrimes sblock.fs_fmask = ~(sblock.fs_fsize - 1); 2211558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2221558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 22392712Siedowse sblock.fs_bshift = ilog2(sblock.fs_bsize); 22492712Siedowse sblock.fs_fshift = ilog2(sblock.fs_fsize); 2251558Srgrimes sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); 22692712Siedowse sblock.fs_fragshift = ilog2(sblock.fs_frag); 2271558Srgrimes if (sblock.fs_frag > MAXFRAG) { 22893775Sbde printf("fragment size %d is still too small (can't happen)\n", 2291558Srgrimes sblock.fs_bsize / MAXFRAG); 2301558Srgrimes exit(21); 2311558Srgrimes } 23298542Smckusick sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize); 23398542Smckusick sblock.fs_size = fssize = dbtofsb(&sblock, fssize); 23498542Smckusick if (Oflag == 1) { 23598542Smckusick sblock.fs_magic = FS_UFS1_MAGIC; 236107294Smckusick sblock.fs_sblockloc = SBLOCK_UFS1; 23798542Smckusick sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs1_daddr_t); 23898542Smckusick sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode); 23998542Smckusick sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * 24098542Smckusick sizeof(ufs1_daddr_t)); 24198542Smckusick sblock.fs_old_inodefmt = FS_44INODEFMT; 24298542Smckusick sblock.fs_old_cgoffset = 0; 24398542Smckusick sblock.fs_old_cgmask = 0xffffffff; 24498542Smckusick sblock.fs_old_size = sblock.fs_size; 24598542Smckusick sblock.fs_old_rotdelay = 0; 24698542Smckusick sblock.fs_old_rps = 60; 24798542Smckusick sblock.fs_old_nspf = sblock.fs_fsize / sectorsize; 24898542Smckusick sblock.fs_old_cpg = 1; 24998542Smckusick sblock.fs_old_interleave = 1; 25098542Smckusick sblock.fs_old_trackskew = 0; 25198542Smckusick sblock.fs_old_cpc = 0; 25298542Smckusick sblock.fs_old_postblformat = 1; 25398542Smckusick sblock.fs_old_nrpos = 1; 25498542Smckusick } else { 25598542Smckusick sblock.fs_magic = FS_UFS2_MAGIC; 256107294Smckusick sblock.fs_sblockloc = SBLOCK_UFS2; 25798542Smckusick sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs2_daddr_t); 25898542Smckusick sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode); 25998542Smckusick sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * 26098542Smckusick sizeof(ufs2_daddr_t)); 26198542Smckusick } 2621558Srgrimes sblock.fs_sblkno = 263107294Smckusick roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize), 264107294Smckusick sblock.fs_frag); 26598542Smckusick sblock.fs_cblkno = sblock.fs_sblkno + 26698542Smckusick roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag); 2671558Srgrimes sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; 2681558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2691558Srgrimes for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) { 2701558Srgrimes sizepb *= NINDIR(&sblock); 2711558Srgrimes sblock.fs_maxfilesize += sizepb; 2721558Srgrimes } 2731558Srgrimes /* 27498542Smckusick * Calculate the number of blocks to put into each cylinder group. 27598542Smckusick * 27698542Smckusick * This algorithm selects the number of blocks per cylinder 27798542Smckusick * group. The first goal is to have at least enough data blocks 27898542Smckusick * in each cylinder group to meet the density requirement. Once 27998542Smckusick * this goal is achieved we try to expand to have at least 28098542Smckusick * MINCYLGRPS cylinder groups. Once this goal is achieved, we 28198542Smckusick * pack as many blocks into each cylinder group map as will fit. 28298542Smckusick * 28398542Smckusick * We start by calculating the smallest number of blocks that we 28498542Smckusick * can put into each cylinder group. If this is too big, we reduce 28598542Smckusick * the density until it fits. 2861558Srgrimes */ 28798542Smckusick origdensity = density; 28898542Smckusick for (;;) { 289107412Smckusick fragsperinode = MAX(numfrags(&sblock, density), 1); 29098542Smckusick minfpg = fragsperinode * INOPB(&sblock); 29198542Smckusick if (minfpg > sblock.fs_size) 29298542Smckusick minfpg = sblock.fs_size; 29398542Smckusick sblock.fs_ipg = INOPB(&sblock); 29498542Smckusick sblock.fs_fpg = roundup(sblock.fs_iblkno + 29598542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 29698542Smckusick if (sblock.fs_fpg < minfpg) 29798542Smckusick sblock.fs_fpg = minfpg; 29898542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 29998542Smckusick INOPB(&sblock)); 30098542Smckusick sblock.fs_fpg = roundup(sblock.fs_iblkno + 30198542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 30298542Smckusick if (sblock.fs_fpg < minfpg) 30398542Smckusick sblock.fs_fpg = minfpg; 30498542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 30598542Smckusick INOPB(&sblock)); 30698542Smckusick if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 30798542Smckusick break; 30898542Smckusick density -= sblock.fs_fsize; 3091558Srgrimes } 31098542Smckusick if (density != origdensity) 31198542Smckusick printf("density reduced from %d to %d\n", origdensity, density); 3121558Srgrimes /* 31398542Smckusick * Start packing more blocks into the cylinder group until 31498542Smckusick * it cannot grow any larger, the number of cylinder groups 31598542Smckusick * drops below MINCYLGRPS, or we reach the size requested. 3161558Srgrimes */ 31798542Smckusick for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) { 31898542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 31998542Smckusick INOPB(&sblock)); 32098542Smckusick if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS) 3211558Srgrimes break; 32298542Smckusick if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 32398542Smckusick continue; 32498542Smckusick if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize) 3251558Srgrimes break; 32698542Smckusick sblock.fs_fpg -= sblock.fs_frag; 32798542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 32898542Smckusick INOPB(&sblock)); 32998542Smckusick break; 3301558Srgrimes } 3318871Srgrimes /* 33298542Smckusick * Check to be sure that the last cylinder group has enough blocks 33398542Smckusick * to be viable. If it is too small, reduce the number of blocks 33498542Smckusick * per cylinder group which will have the effect of moving more 33598542Smckusick * blocks into the last cylinder group. 3361558Srgrimes */ 33798542Smckusick optimalfpg = sblock.fs_fpg; 33898542Smckusick for (;;) { 33998542Smckusick sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); 34098542Smckusick lastminfpg = roundup(sblock.fs_iblkno + 34198542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 34298542Smckusick if (sblock.fs_size < lastminfpg) { 34399796Sbde printf("Filesystem size %jd < minimum size of %d\n", 34499796Sbde (intmax_t)sblock.fs_size, lastminfpg); 34598542Smckusick exit(28); 34698542Smckusick } 34798542Smckusick if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || 34898542Smckusick sblock.fs_size % sblock.fs_fpg == 0) 34998542Smckusick break; 35098542Smckusick sblock.fs_fpg -= sblock.fs_frag; 35198542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 35298542Smckusick INOPB(&sblock)); 3531558Srgrimes } 35498542Smckusick if (optimalfpg != sblock.fs_fpg) 35598542Smckusick printf("Reduced frags per cylinder group from %d to %d %s\n", 35698542Smckusick optimalfpg, sblock.fs_fpg, "to enlarge last cyl group"); 3571558Srgrimes sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); 3581558Srgrimes sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); 35998542Smckusick if (Oflag == 1) { 36098542Smckusick sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf; 36198542Smckusick sblock.fs_old_nsect = sblock.fs_old_spc; 36298542Smckusick sblock.fs_old_npsect = sblock.fs_old_spc; 36398542Smckusick sblock.fs_old_ncyl = sblock.fs_ncg; 3641558Srgrimes } 3651558Srgrimes /* 3661558Srgrimes * fill in remaining fields of the super block 3671558Srgrimes */ 3681558Srgrimes sblock.fs_csaddr = cgdmin(&sblock, 0); 3691558Srgrimes sblock.fs_cssize = 3701558Srgrimes fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); 3711558Srgrimes fscs = (struct csum *)calloc(1, sblock.fs_cssize); 37237664Scharnier if (fscs == NULL) 37337664Scharnier errx(31, "calloc failed"); 37498542Smckusick sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); 375105423Smckusick if (sblock.fs_sbsize > SBLOCKSIZE) 376105423Smckusick sblock.fs_sbsize = SBLOCKSIZE; 3771558Srgrimes sblock.fs_minfree = minfree; 3781558Srgrimes sblock.fs_maxbpg = maxbpg; 3791558Srgrimes sblock.fs_optim = opt; 3801558Srgrimes sblock.fs_cgrotor = 0; 38198542Smckusick sblock.fs_pendingblocks = 0; 38298542Smckusick sblock.fs_pendinginodes = 0; 3831558Srgrimes sblock.fs_fmod = 0; 3841558Srgrimes sblock.fs_ronly = 0; 38598542Smckusick sblock.fs_state = 0; 3862294Sdg sblock.fs_clean = 1; 38724149Sguido sblock.fs_id[0] = (long)utime; 388111268Smckusick sblock.fs_id[1] = newfs_random(); 38998542Smckusick sblock.fs_fsmnt[0] = '\0'; 39098542Smckusick csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); 39198542Smckusick sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - 39298542Smckusick sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); 39398542Smckusick sblock.fs_cstotal.cs_nbfree = 39498542Smckusick fragstoblks(&sblock, sblock.fs_dsize) - 39598542Smckusick howmany(csfrags, sblock.fs_frag); 39698542Smckusick sblock.fs_cstotal.cs_nffree = 39798542Smckusick fragnum(&sblock, sblock.fs_size) + 398107519Smckusick (fragnum(&sblock, csfrags) > 0 ? 399107519Smckusick sblock.fs_frag - fragnum(&sblock, csfrags) : 0); 40098542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 40198542Smckusick sblock.fs_cstotal.cs_ndir = 0; 40298542Smckusick sblock.fs_dsize -= csfrags; 40398542Smckusick sblock.fs_time = utime; 40498542Smckusick if (Oflag == 1) { 40598542Smckusick sblock.fs_old_time = utime; 40698542Smckusick sblock.fs_old_dsize = sblock.fs_dsize; 40798542Smckusick sblock.fs_old_csaddr = sblock.fs_csaddr; 40898542Smckusick sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 40998542Smckusick sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 41098542Smckusick sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 41198542Smckusick sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 41298542Smckusick } 41324149Sguido 4141558Srgrimes /* 415102231Strhodes * Dump out summary information about file system. 4161558Srgrimes */ 41798542Smckusick# define B2MBFACTOR (1 / (1024.0 * 1024.0)) 41899796Sbde printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n", 41998542Smckusick fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, 42099796Sbde (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, 42199796Sbde sblock.fs_fsize); 42298542Smckusick printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n", 42398542Smckusick sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, 42498542Smckusick sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); 42598542Smckusick if (sblock.fs_flags & FS_DOSOFTDEP) 42698542Smckusick printf("\twith soft updates\n"); 42798542Smckusick# undef B2MBFACTOR 4281558Srgrimes /* 4291558Srgrimes * Now build the cylinders group blocks and 4301558Srgrimes * then print out indices of cylinder groups. 4311558Srgrimes */ 43277420Sphk printf("super-block backups (for fsck -b #) at:\n"); 43313769Sjoerg i = 0; 43413769Sjoerg width = charsperline(); 43598542Smckusick /* 436107412Smckusick * allocate space for superblock, cylinder group map, and 437107412Smckusick * two sets of inode blocks. 438107412Smckusick */ 439107412Smckusick if (sblock.fs_bsize < SBLOCKSIZE) 440107412Smckusick iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize; 441107412Smckusick else 442107412Smckusick iobufsize = 4 * sblock.fs_bsize; 443107412Smckusick if ((iobuf = malloc(iobufsize)) == 0) { 444107412Smckusick printf("Cannot allocate I/O buffer\n"); 445107412Smckusick exit(38); 446107412Smckusick } 447107412Smckusick bzero(iobuf, iobufsize); 448107412Smckusick /* 44998542Smckusick * Make a copy of the superblock into the buffer that we will be 45098542Smckusick * writing out in each cylinder group. 45198542Smckusick */ 45298542Smckusick bcopy((char *)&sblock, iobuf, SBLOCKSIZE); 4531558Srgrimes for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { 4541558Srgrimes initcg(cylno, utime); 45599796Sbde j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s", 45699796Sbde (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)), 45785860Sphk cylno < (sblock.fs_ncg-1) ? "," : ""); 45881980Sbrian if (j < 0) 45981980Sbrian tmpbuf[j = 0] = '\0'; 46037239Sbde if (i + j >= width) { 4611558Srgrimes printf("\n"); 46213769Sjoerg i = 0; 46313769Sjoerg } 46413769Sjoerg i += j; 46513769Sjoerg printf("%s", tmpbuf); 4668218Sdg fflush(stdout); 4671558Srgrimes } 46877420Sphk printf("\n"); 46977420Sphk if (Nflag) 4701558Srgrimes exit(0); 4711558Srgrimes /* 472102231Strhodes * Now construct the initial file system, 4731558Srgrimes * then write out the super-block. 4741558Srgrimes */ 4751558Srgrimes fsinit(utime); 47698542Smckusick if (Oflag == 1) { 47798542Smckusick sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 47898542Smckusick sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 47998542Smckusick sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 48098542Smckusick sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 48198542Smckusick } 482110671Sjmallett if (!Nflag) 483110671Sjmallett sbwrite(&disk, 0); 4841558Srgrimes for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) 4851558Srgrimes wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), 4861558Srgrimes sblock.fs_cssize - i < sblock.fs_bsize ? 48785860Sphk sblock.fs_cssize - i : sblock.fs_bsize, 4881558Srgrimes ((char *)fscs) + i); 4891558Srgrimes /* 4901558Srgrimes * Update information about this partion in pack 4911558Srgrimes * label, to that it may be updated on disk. 4921558Srgrimes */ 49395357Sphk if (pp != NULL) { 49495357Sphk pp->p_fstype = FS_BSDFFS; 49595357Sphk pp->p_fsize = sblock.fs_fsize; 49695357Sphk pp->p_frag = sblock.fs_frag; 49798542Smckusick pp->p_cpg = sblock.fs_fpg; 49895357Sphk } 4991558Srgrimes} 5001558Srgrimes 5011558Srgrimes/* 5021558Srgrimes * Initialize a cylinder group. 5031558Srgrimes */ 50437664Scharniervoid 50592711Siedowseinitcg(int cylno, time_t utime) 5061558Srgrimes{ 50798542Smckusick long i, j, d, dlower, dupper, blkno, start; 50898542Smckusick ufs2_daddr_t cbase, dmax; 50998542Smckusick struct ufs1_dinode *dp1; 51098542Smckusick struct ufs2_dinode *dp2; 51192483Sphk struct csum *cs; 5121558Srgrimes 5131558Srgrimes /* 5141558Srgrimes * Determine block bounds for cylinder group. 5151558Srgrimes * Allow space for super block summary information in first 5161558Srgrimes * cylinder group. 5171558Srgrimes */ 5181558Srgrimes cbase = cgbase(&sblock, cylno); 5191558Srgrimes dmax = cbase + sblock.fs_fpg; 5201558Srgrimes if (dmax > sblock.fs_size) 5211558Srgrimes dmax = sblock.fs_size; 5221558Srgrimes dlower = cgsblock(&sblock, cylno) - cbase; 5231558Srgrimes dupper = cgdmin(&sblock, cylno) - cbase; 5241558Srgrimes if (cylno == 0) 5251558Srgrimes dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); 52698542Smckusick cs = &fscs[cylno]; 52723682Speter memset(&acg, 0, sblock.fs_cgsize); 5281558Srgrimes acg.cg_time = utime; 5291558Srgrimes acg.cg_magic = CG_MAGIC; 5301558Srgrimes acg.cg_cgx = cylno; 5311558Srgrimes acg.cg_niblk = sblock.fs_ipg; 53298542Smckusick acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ? 53398542Smckusick sblock.fs_ipg : 2 * INOPB(&sblock); 5341558Srgrimes acg.cg_ndblk = dmax - cbase; 5351558Srgrimes if (sblock.fs_contigsumsize > 0) 5361558Srgrimes acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag; 53798542Smckusick start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield); 53898542Smckusick if (Oflag == 2) { 53998542Smckusick acg.cg_iusedoff = start; 54098542Smckusick } else { 54198542Smckusick acg.cg_old_ncyl = sblock.fs_old_cpg; 54298542Smckusick acg.cg_old_time = acg.cg_time; 54398542Smckusick acg.cg_time = 0; 54498542Smckusick acg.cg_old_niblk = acg.cg_niblk; 54598542Smckusick acg.cg_niblk = 0; 54698542Smckusick acg.cg_initediblk = 0; 54798542Smckusick acg.cg_old_btotoff = start; 54898542Smckusick acg.cg_old_boff = acg.cg_old_btotoff + 54998542Smckusick sblock.fs_old_cpg * sizeof(int32_t); 55098542Smckusick acg.cg_iusedoff = acg.cg_old_boff + 55198542Smckusick sblock.fs_old_cpg * sizeof(u_int16_t); 55298542Smckusick } 553103949Smike acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT); 554103949Smike acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT); 55598542Smckusick if (sblock.fs_contigsumsize > 0) { 5561558Srgrimes acg.cg_clustersumoff = 55798542Smckusick roundup(acg.cg_nextfreeoff, sizeof(u_int32_t)); 55898542Smckusick acg.cg_clustersumoff -= sizeof(u_int32_t); 5591558Srgrimes acg.cg_clusteroff = acg.cg_clustersumoff + 56038579Sdfr (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 56198542Smckusick acg.cg_nextfreeoff = acg.cg_clusteroff + 562103949Smike howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT); 5631558Srgrimes } 56498542Smckusick if (acg.cg_nextfreeoff > sblock.fs_cgsize) { 5651558Srgrimes printf("Panic: cylinder group too big\n"); 5661558Srgrimes exit(37); 5671558Srgrimes } 5681558Srgrimes acg.cg_cs.cs_nifree += sblock.fs_ipg; 5691558Srgrimes if (cylno == 0) 57098542Smckusick for (i = 0; i < (long)ROOTINO; i++) { 5711558Srgrimes setbit(cg_inosused(&acg), i); 5721558Srgrimes acg.cg_cs.cs_nifree--; 5731558Srgrimes } 5741558Srgrimes if (cylno > 0) { 5751558Srgrimes /* 5761558Srgrimes * In cylno 0, beginning space is reserved 5771558Srgrimes * for boot and super blocks. 5781558Srgrimes */ 5791558Srgrimes for (d = 0; d < dlower; d += sblock.fs_frag) { 5801558Srgrimes blkno = d / sblock.fs_frag; 5811558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 5821558Srgrimes if (sblock.fs_contigsumsize > 0) 5831558Srgrimes setbit(cg_clustersfree(&acg), blkno); 5841558Srgrimes acg.cg_cs.cs_nbfree++; 5851558Srgrimes } 5861558Srgrimes } 58737664Scharnier if ((i = dupper % sblock.fs_frag)) { 5881558Srgrimes acg.cg_frsum[sblock.fs_frag - i]++; 5891558Srgrimes for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { 5901558Srgrimes setbit(cg_blksfree(&acg), dupper); 5911558Srgrimes acg.cg_cs.cs_nffree++; 5921558Srgrimes } 5931558Srgrimes } 59498542Smckusick for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk; 59598542Smckusick d += sblock.fs_frag) { 5961558Srgrimes blkno = d / sblock.fs_frag; 5971558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 5981558Srgrimes if (sblock.fs_contigsumsize > 0) 5991558Srgrimes setbit(cg_clustersfree(&acg), blkno); 6001558Srgrimes acg.cg_cs.cs_nbfree++; 6011558Srgrimes } 60298542Smckusick if (d < acg.cg_ndblk) { 60398542Smckusick acg.cg_frsum[acg.cg_ndblk - d]++; 60498542Smckusick for (; d < acg.cg_ndblk; d++) { 6051558Srgrimes setbit(cg_blksfree(&acg), d); 6061558Srgrimes acg.cg_cs.cs_nffree++; 6071558Srgrimes } 6081558Srgrimes } 6091558Srgrimes if (sblock.fs_contigsumsize > 0) { 61023682Speter int32_t *sump = cg_clustersum(&acg); 6111558Srgrimes u_char *mapp = cg_clustersfree(&acg); 6121558Srgrimes int map = *mapp++; 6131558Srgrimes int bit = 1; 6141558Srgrimes int run = 0; 6151558Srgrimes 6161558Srgrimes for (i = 0; i < acg.cg_nclusterblks; i++) { 61785860Sphk if ((map & bit) != 0) 6181558Srgrimes run++; 61985860Sphk else if (run != 0) { 6201558Srgrimes if (run > sblock.fs_contigsumsize) 6211558Srgrimes run = sblock.fs_contigsumsize; 6221558Srgrimes sump[run]++; 6231558Srgrimes run = 0; 6241558Srgrimes } 625103949Smike if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1) 6261558Srgrimes bit <<= 1; 62785860Sphk else { 6281558Srgrimes map = *mapp++; 6291558Srgrimes bit = 1; 6301558Srgrimes } 6311558Srgrimes } 6321558Srgrimes if (run != 0) { 6331558Srgrimes if (run > sblock.fs_contigsumsize) 6341558Srgrimes run = sblock.fs_contigsumsize; 6351558Srgrimes sump[run]++; 6361558Srgrimes } 6371558Srgrimes } 6381558Srgrimes *cs = acg.cg_cs; 63998542Smckusick /* 64098542Smckusick * Write out the duplicate super block, the cylinder group map 64198542Smckusick * and two blocks worth of inodes in a single write. 64298542Smckusick */ 64398542Smckusick start = sblock.fs_bsize > SBLOCKSIZE ? sblock.fs_bsize : SBLOCKSIZE; 64498542Smckusick bcopy((char *)&acg, &iobuf[start], sblock.fs_cgsize); 64598542Smckusick start += sblock.fs_bsize; 64698542Smckusick dp1 = (struct ufs1_dinode *)(&iobuf[start]); 64798542Smckusick dp2 = (struct ufs2_dinode *)(&iobuf[start]); 64898542Smckusick for (i = 0; i < acg.cg_initediblk; i++) { 64998542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) { 650111268Smckusick dp1->di_gen = newfs_random(); 65198542Smckusick dp1++; 65298542Smckusick } else { 653111268Smckusick dp2->di_gen = newfs_random(); 65498542Smckusick dp2++; 65598542Smckusick } 65698542Smckusick } 65798542Smckusick wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf); 65898542Smckusick /* 659102231Strhodes * For the old file system, we have to initialize all the inodes. 66098542Smckusick */ 66198542Smckusick if (Oflag == 1) { 66298542Smckusick for (i = 2 * sblock.fs_frag; 66398542Smckusick i < sblock.fs_ipg / INOPF(&sblock); 66498542Smckusick i += sblock.fs_frag) { 66598542Smckusick dp1 = (struct ufs1_dinode *)(&iobuf[start]); 66698542Smckusick for (j = 0; j < INOPB(&sblock); j++) { 667111268Smckusick dp1->di_gen = newfs_random(); 66898542Smckusick dp1++; 66998542Smckusick } 67098542Smckusick wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), 67198542Smckusick sblock.fs_bsize, &iobuf[start]); 67298542Smckusick } 67398542Smckusick } 6741558Srgrimes} 6751558Srgrimes 6761558Srgrimes/* 677102231Strhodes * initialize the file system 6781558Srgrimes */ 6791558Srgrimes#define PREDEFDIR 2 6801558Srgrimes 6811558Srgrimesstruct direct root_dir[] = { 6821558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 1, "." }, 6831558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 6841558Srgrimes}; 6851558Srgrimes 68637664Scharniervoid 68792711Siedowsefsinit(time_t utime) 6881558Srgrimes{ 68998542Smckusick union dinode node; 6901558Srgrimes 69198542Smckusick memset(&node, 0, sizeof node); 69298542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) { 69398542Smckusick /* 69498542Smckusick * initialize the node 69598542Smckusick */ 69698542Smckusick node.dp1.di_atime = utime; 69798542Smckusick node.dp1.di_mtime = utime; 69898542Smckusick node.dp1.di_ctime = utime; 69998542Smckusick /* 70098542Smckusick * create the root directory 70198542Smckusick */ 70298542Smckusick node.dp1.di_mode = IFDIR | UMASK; 70398542Smckusick node.dp1.di_nlink = PREDEFDIR; 70498542Smckusick node.dp1.di_size = makedir(root_dir, PREDEFDIR); 70598542Smckusick node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode); 70698542Smckusick node.dp1.di_blocks = 70798542Smckusick btodb(fragroundup(&sblock, node.dp1.di_size)); 70898542Smckusick wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize, 70998542Smckusick iobuf); 71098542Smckusick } else { 71198542Smckusick /* 71298542Smckusick * initialize the node 71398542Smckusick */ 71498542Smckusick node.dp2.di_atime = utime; 71598542Smckusick node.dp2.di_mtime = utime; 71698542Smckusick node.dp2.di_ctime = utime; 717100231Sroberto node.dp2.di_birthtime = utime; 71898542Smckusick /* 71998542Smckusick * create the root directory 72098542Smckusick */ 72198542Smckusick node.dp2.di_mode = IFDIR | UMASK; 72298542Smckusick node.dp2.di_nlink = PREDEFDIR; 72398542Smckusick node.dp2.di_size = makedir(root_dir, PREDEFDIR); 72498542Smckusick node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode); 72598542Smckusick node.dp2.di_blocks = 72698542Smckusick btodb(fragroundup(&sblock, node.dp2.di_size)); 72798542Smckusick wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize, 72898542Smckusick iobuf); 72998542Smckusick } 7301558Srgrimes iput(&node, ROOTINO); 7311558Srgrimes} 7321558Srgrimes 7331558Srgrimes/* 73498542Smckusick * construct a set of directory entries in "iobuf". 7351558Srgrimes * return size of directory. 7361558Srgrimes */ 73737664Scharnierint 73892711Siedowsemakedir(struct direct *protodir, int entries) 7391558Srgrimes{ 7401558Srgrimes char *cp; 7411558Srgrimes int i, spcleft; 7421558Srgrimes 7431558Srgrimes spcleft = DIRBLKSIZ; 74498542Smckusick memset(iobuf, 0, DIRBLKSIZ); 74598542Smckusick for (cp = iobuf, i = 0; i < entries - 1; i++) { 7461558Srgrimes protodir[i].d_reclen = DIRSIZ(0, &protodir[i]); 74723682Speter memmove(cp, &protodir[i], protodir[i].d_reclen); 7481558Srgrimes cp += protodir[i].d_reclen; 7491558Srgrimes spcleft -= protodir[i].d_reclen; 7501558Srgrimes } 7511558Srgrimes protodir[i].d_reclen = spcleft; 75223682Speter memmove(cp, &protodir[i], DIRSIZ(0, &protodir[i])); 7531558Srgrimes return (DIRBLKSIZ); 7541558Srgrimes} 7551558Srgrimes 7561558Srgrimes/* 7571558Srgrimes * allocate a block or frag 7581558Srgrimes */ 75998542Smckusickufs2_daddr_t 76092711Siedowsealloc(int size, int mode) 7611558Srgrimes{ 76298542Smckusick int i, d, blkno, frag; 7631558Srgrimes 764110671Sjmallett bread(&disk, fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 765110671Sjmallett sblock.fs_cgsize); 7661558Srgrimes if (acg.cg_magic != CG_MAGIC) { 7671558Srgrimes printf("cg 0: bad magic number\n"); 7681558Srgrimes return (0); 7691558Srgrimes } 7701558Srgrimes if (acg.cg_cs.cs_nbfree == 0) { 7711558Srgrimes printf("first cylinder group ran out of space\n"); 7721558Srgrimes return (0); 7731558Srgrimes } 7741558Srgrimes for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) 7751558Srgrimes if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) 7761558Srgrimes goto goth; 7771558Srgrimes printf("internal error: can't find block in cyl 0\n"); 7781558Srgrimes return (0); 7791558Srgrimesgoth: 7801558Srgrimes blkno = fragstoblks(&sblock, d); 7811558Srgrimes clrblock(&sblock, cg_blksfree(&acg), blkno); 78223682Speter if (sblock.fs_contigsumsize > 0) 78323682Speter clrbit(cg_clustersfree(&acg), blkno); 7841558Srgrimes acg.cg_cs.cs_nbfree--; 7851558Srgrimes sblock.fs_cstotal.cs_nbfree--; 7861558Srgrimes fscs[0].cs_nbfree--; 7871558Srgrimes if (mode & IFDIR) { 7881558Srgrimes acg.cg_cs.cs_ndir++; 7891558Srgrimes sblock.fs_cstotal.cs_ndir++; 7901558Srgrimes fscs[0].cs_ndir++; 7911558Srgrimes } 7921558Srgrimes if (size != sblock.fs_bsize) { 7931558Srgrimes frag = howmany(size, sblock.fs_fsize); 7941558Srgrimes fscs[0].cs_nffree += sblock.fs_frag - frag; 7951558Srgrimes sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; 7961558Srgrimes acg.cg_cs.cs_nffree += sblock.fs_frag - frag; 7971558Srgrimes acg.cg_frsum[sblock.fs_frag - frag]++; 7981558Srgrimes for (i = frag; i < sblock.fs_frag; i++) 7991558Srgrimes setbit(cg_blksfree(&acg), d + i); 8001558Srgrimes } 801110671Sjmallett /* XXX cgwrite(&disk, 0)??? */ 8021558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 8031558Srgrimes (char *)&acg); 80498542Smckusick return ((ufs2_daddr_t)d); 8051558Srgrimes} 8061558Srgrimes 8071558Srgrimes/* 8081558Srgrimes * Allocate an inode on the disk 8091558Srgrimes */ 81037664Scharniervoid 81198542Smckusickiput(union dinode *ip, ino_t ino) 8121558Srgrimes{ 81398542Smckusick ufs2_daddr_t d; 8141558Srgrimes int c; 8151558Srgrimes 8161558Srgrimes c = ino_to_cg(&sblock, ino); 817110671Sjmallett bread(&disk, fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 818110671Sjmallett sblock.fs_cgsize); 8191558Srgrimes if (acg.cg_magic != CG_MAGIC) { 8201558Srgrimes printf("cg 0: bad magic number\n"); 8211558Srgrimes exit(31); 8221558Srgrimes } 8231558Srgrimes acg.cg_cs.cs_nifree--; 8241558Srgrimes setbit(cg_inosused(&acg), ino); 8251558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 8261558Srgrimes (char *)&acg); 8271558Srgrimes sblock.fs_cstotal.cs_nifree--; 8281558Srgrimes fscs[0].cs_nifree--; 82998542Smckusick if (ino >= (unsigned long)sblock.fs_ipg * sblock.fs_ncg) { 8301558Srgrimes printf("fsinit: inode value out of range (%d).\n", ino); 8311558Srgrimes exit(32); 8321558Srgrimes } 8331558Srgrimes d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino)); 834110671Sjmallett bread(&disk, d, (char *)iobuf, sblock.fs_bsize); 83598542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) 83698542Smckusick ((struct ufs1_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] = 83798542Smckusick ip->dp1; 83898542Smckusick else 83998542Smckusick ((struct ufs2_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] = 84098542Smckusick ip->dp2; 841110065Sjmallett wtfs(d, sblock.fs_bsize, (char *)iobuf); 8421558Srgrimes} 8431558Srgrimes 8441558Srgrimes/* 845110671Sjmallett * possibly write to disk 8461558Srgrimes */ 84793737Sphkstatic void 84898542Smckusickwtfs(ufs2_daddr_t bno, int size, char *bf) 8491558Srgrimes{ 8501558Srgrimes if (Nflag) 8511558Srgrimes return; 852110671Sjmallett bwrite(&disk, bno, bf, size); 8531558Srgrimes} 8541558Srgrimes 8551558Srgrimes/* 8561558Srgrimes * check if a block is available 8571558Srgrimes */ 85893737Sphkstatic int 85992711Siedowseisblock(struct fs *fs, unsigned char *cp, int h) 8601558Srgrimes{ 8611558Srgrimes unsigned char mask; 8621558Srgrimes 8631558Srgrimes switch (fs->fs_frag) { 8641558Srgrimes case 8: 8651558Srgrimes return (cp[h] == 0xff); 8661558Srgrimes case 4: 8671558Srgrimes mask = 0x0f << ((h & 0x1) << 2); 8681558Srgrimes return ((cp[h >> 1] & mask) == mask); 8691558Srgrimes case 2: 8701558Srgrimes mask = 0x03 << ((h & 0x3) << 1); 8711558Srgrimes return ((cp[h >> 2] & mask) == mask); 8721558Srgrimes case 1: 8731558Srgrimes mask = 0x01 << (h & 0x7); 8741558Srgrimes return ((cp[h >> 3] & mask) == mask); 8751558Srgrimes default: 8761558Srgrimes fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); 8771558Srgrimes return (0); 8781558Srgrimes } 8791558Srgrimes} 8801558Srgrimes 8811558Srgrimes/* 8821558Srgrimes * take a block out of the map 8831558Srgrimes */ 88493737Sphkstatic void 88592711Siedowseclrblock(struct fs *fs, unsigned char *cp, int h) 8861558Srgrimes{ 8871558Srgrimes switch ((fs)->fs_frag) { 8881558Srgrimes case 8: 8891558Srgrimes cp[h] = 0; 8901558Srgrimes return; 8911558Srgrimes case 4: 8921558Srgrimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 8931558Srgrimes return; 8941558Srgrimes case 2: 8951558Srgrimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 8961558Srgrimes return; 8971558Srgrimes case 1: 8981558Srgrimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 8991558Srgrimes return; 9001558Srgrimes default: 9011558Srgrimes fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); 9021558Srgrimes return; 9031558Srgrimes } 9041558Srgrimes} 9051558Srgrimes 9061558Srgrimes/* 9071558Srgrimes * put a block into the map 9081558Srgrimes */ 90993737Sphkstatic void 91092711Siedowsesetblock(struct fs *fs, unsigned char *cp, int h) 9111558Srgrimes{ 9121558Srgrimes switch (fs->fs_frag) { 9131558Srgrimes case 8: 9141558Srgrimes cp[h] = 0xff; 9151558Srgrimes return; 9161558Srgrimes case 4: 9171558Srgrimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 9181558Srgrimes return; 9191558Srgrimes case 2: 9201558Srgrimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 9211558Srgrimes return; 9221558Srgrimes case 1: 9231558Srgrimes cp[h >> 3] |= (0x01 << (h & 0x7)); 9241558Srgrimes return; 9251558Srgrimes default: 9261558Srgrimes fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); 9271558Srgrimes return; 9281558Srgrimes } 9291558Srgrimes} 93013637Sjoerg 93113637Sjoerg/* 93213769Sjoerg * Determine the number of characters in a 93313637Sjoerg * single line. 93413637Sjoerg */ 93513637Sjoerg 93613637Sjoergstatic int 93792717Sphkcharsperline(void) 93813637Sjoerg{ 93913769Sjoerg int columns; 94013637Sjoerg char *cp; 94113637Sjoerg struct winsize ws; 94213637Sjoerg 94313637Sjoerg columns = 0; 94413637Sjoerg if (ioctl(0, TIOCGWINSZ, &ws) != -1) 94513637Sjoerg columns = ws.ws_col; 94613637Sjoerg if (columns == 0 && (cp = getenv("COLUMNS"))) 94713637Sjoerg columns = atoi(cp); 94813637Sjoerg if (columns == 0) 94913637Sjoerg columns = 80; /* last resort */ 95085860Sphk return (columns); 95113637Sjoerg} 95292712Siedowse 95392712Siedowsestatic int 95492712Siedowseilog2(int val) 95592712Siedowse{ 95692763Sphk u_int n; 95792712Siedowse 958103949Smike for (n = 0; n < sizeof(n) * CHAR_BIT; n++) 95992712Siedowse if (1 << n == val) 96092712Siedowse return (n); 96192712Siedowse errx(1, "ilog2: %d is not a power of 2\n", val); 96292712Siedowse} 963111268Smckusick 964111268Smckusick/* 965111268Smckusick * For the regression test, return predictable random values. 966111268Smckusick * Otherwise use a true random number generator. 967111268Smckusick */ 968111268Smckusickstatic u_int32_t 969111268Smckusicknewfs_random(void) 970111268Smckusick{ 971111268Smckusick static int nextnum = 1; 972111268Smckusick 973111268Smckusick if (Rflag) 974111268Smckusick return (nextnum++); 975111268Smckusick return (arc4random()); 976111268Smckusick} 977