mkfs.c revision 149048
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 * 4. Neither the name of the University nor the names of its contributors 231558Srgrimes * may be used to endorse or promote products derived from this software 241558Srgrimes * without specific prior written permission. 251558Srgrimes * 261558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 271558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 281558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 291558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 301558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 311558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 321558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 331558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 341558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 351558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 361558Srgrimes * SUCH DAMAGE. 371558Srgrimes */ 381558Srgrimes 39114589Sobrien#if 0 401558Srgrimes#ifndef lint 4123682Speterstatic char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95"; 42114589Sobrien#endif /* not lint */ 4337664Scharnier#endif 44114589Sobrien#include <sys/cdefs.h> 45114589Sobrien__FBSDID("$FreeBSD: head/sbin/newfs/mkfs.c 149048 2005-08-14 17:07:04Z iedowse $"); 461558Srgrimes 4737664Scharnier#include <err.h> 48122037Smckusick#include <grp.h> 49103949Smike#include <limits.h> 5037664Scharnier#include <signal.h> 5192709Siedowse#include <stdlib.h> 5237664Scharnier#include <string.h> 5399796Sbde#include <stdint.h> 5437664Scharnier#include <stdio.h> 551558Srgrimes#include <unistd.h> 561558Srgrimes#include <sys/param.h> 571558Srgrimes#include <sys/time.h> 5837664Scharnier#include <sys/types.h> 591558Srgrimes#include <sys/wait.h> 601558Srgrimes#include <sys/resource.h> 6143804Sdillon#include <sys/stat.h> 621558Srgrimes#include <ufs/ufs/dinode.h> 631558Srgrimes#include <ufs/ufs/dir.h> 641558Srgrimes#include <ufs/ffs/fs.h> 651558Srgrimes#include <sys/disklabel.h> 663550Sphk#include <sys/file.h> 673550Sphk#include <sys/mman.h> 6813637Sjoerg#include <sys/ioctl.h> 6992717Sphk#include "newfs.h" 701558Srgrimes 711558Srgrimes/* 72102231Strhodes * make file system for cylinder-group style file systems 731558Srgrimes */ 741558Srgrimes#define UMASK 0755 751558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 761558Srgrimes 7792717Sphkstatic struct csum *fscs; 78110671Sjmallett#define sblock disk.d_fs 79110671Sjmallett#define acg disk.d_cg 801558Srgrimes 8198542Smckusickunion dinode { 8298542Smckusick struct ufs1_dinode dp1; 8398542Smckusick struct ufs2_dinode dp2; 8498542Smckusick}; 8598542Smckusick#define DIP(dp, field) \ 8698542Smckusick ((sblock.fs_magic == FS_UFS1_MAGIC) ? \ 8798542Smckusick (dp)->dp1.field : (dp)->dp2.field) 881558Srgrimes 8998542Smckusickstatic caddr_t iobuf; 9098542Smckusickstatic long iobufsize; 9198542Smckusickstatic ufs2_daddr_t alloc(int size, int mode); 9292717Sphkstatic int charsperline(void); 9393775Sbdestatic void clrblock(struct fs *, unsigned char *, int); 9493775Sbdestatic void fsinit(time_t); 9592712Siedowsestatic int ilog2(int); 9693775Sbdestatic void initcg(int, time_t); 9793775Sbdestatic int isblock(struct fs *, unsigned char *, int); 9898542Smckusickstatic void iput(union dinode *, ino_t); 9993775Sbdestatic int makedir(struct direct *, int); 10093775Sbdestatic void setblock(struct fs *, unsigned char *, int); 10198542Smckusickstatic void wtfs(ufs2_daddr_t, int, char *); 102111268Smckusickstatic u_int32_t newfs_random(void); 1031558Srgrimes 10437664Scharniervoid 10595357Sphkmkfs(struct partition *pp, char *fsys) 1061558Srgrimes{ 10798542Smckusick int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg; 10898542Smckusick long i, j, cylno, csfrags; 1091558Srgrimes time_t utime; 1101558Srgrimes quad_t sizepb; 11113769Sjoerg int width; 11213769Sjoerg char tmpbuf[100]; /* XXX this will break in about 2,500 years */ 113115235Sdougb union { 114115235Sdougb struct fs fdummy; 115115235Sdougb char cdummy[SBLOCKSIZE]; 116115235Sdougb } dummy; 117115235Sdougb#define fsdummy dummy.fdummy 118115235Sdougb#define chdummy dummy.cdummy 1191558Srgrimes 120110671Sjmallett /* 121110671Sjmallett * Our blocks == sector size, and the version of UFS we are using is 122110671Sjmallett * specified by Oflag. 123110671Sjmallett */ 124110671Sjmallett disk.d_bsize = sectorsize; 125110671Sjmallett disk.d_ufs = Oflag; 126111268Smckusick if (Rflag) { 12792722Sphk utime = 1000000000; 128111268Smckusick } else { 12992722Sphk time(&utime); 130110885Smckusick arc4random_stir(); 13124215Sache } 132107294Smckusick sblock.fs_old_flags = FS_FLAGS_UPDATED; 13398542Smckusick sblock.fs_flags = 0; 13475124Sbde if (Uflag) 13575078Sobrien sblock.fs_flags |= FS_DOSOFTDEP; 136110174Sgordon if (Lflag) 137110174Sgordon strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN); 138126254Srwatson if (lflag) 139126254Srwatson sblock.fs_flags |= FS_MULTILABEL; 1401558Srgrimes /* 141102231Strhodes * Validate the given file system size. 1421558Srgrimes * Verify that its last block can actually be accessed. 143102231Strhodes * Convert to file system fragment sized units. 1441558Srgrimes */ 14598542Smckusick if (fssize <= 0) { 14699796Sbde printf("preposterous size %jd\n", (intmax_t)fssize); 14798542Smckusick exit(13); 14898542Smckusick } 14920061Ssos wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize, 15092532Sbde (char *)&sblock); 1511558Srgrimes /* 152102231Strhodes * collect and verify the file system density info 15375377Smckusick */ 15475377Smckusick sblock.fs_avgfilesize = avgfilesize; 15575377Smckusick sblock.fs_avgfpdir = avgfilesperdir; 15675377Smckusick if (sblock.fs_avgfilesize <= 0) 15775377Smckusick printf("illegal expected average file size %d\n", 15875377Smckusick sblock.fs_avgfilesize), exit(14); 15975377Smckusick if (sblock.fs_avgfpdir <= 0) 16075377Smckusick printf("illegal expected number of files per directory %d\n", 16175377Smckusick sblock.fs_avgfpdir), exit(15); 16275377Smckusick /* 1631558Srgrimes * collect and verify the block and fragment sizes 1641558Srgrimes */ 1651558Srgrimes sblock.fs_bsize = bsize; 1661558Srgrimes sblock.fs_fsize = fsize; 1671558Srgrimes if (!POWEROF2(sblock.fs_bsize)) { 1681558Srgrimes printf("block size must be a power of 2, not %d\n", 1691558Srgrimes sblock.fs_bsize); 1701558Srgrimes exit(16); 1711558Srgrimes } 1721558Srgrimes if (!POWEROF2(sblock.fs_fsize)) { 1731558Srgrimes printf("fragment size must be a power of 2, not %d\n", 1741558Srgrimes sblock.fs_fsize); 1751558Srgrimes exit(17); 1761558Srgrimes } 1771558Srgrimes if (sblock.fs_fsize < sectorsize) { 17893775Sbde printf("increasing fragment size from %d to sector size (%d)\n", 1791558Srgrimes sblock.fs_fsize, sectorsize); 18093737Sphk sblock.fs_fsize = sectorsize; 1811558Srgrimes } 182107412Smckusick if (sblock.fs_bsize > MAXBSIZE) { 183107412Smckusick printf("decreasing block size from %d to maximum (%d)\n", 184107412Smckusick sblock.fs_bsize, MAXBSIZE); 185107412Smckusick sblock.fs_bsize = MAXBSIZE; 186107412Smckusick } 1871558Srgrimes if (sblock.fs_bsize < MINBSIZE) { 18893737Sphk printf("increasing block size from %d to minimum (%d)\n", 1891558Srgrimes sblock.fs_bsize, MINBSIZE); 19093737Sphk sblock.fs_bsize = MINBSIZE; 1911558Srgrimes } 192107412Smckusick if (sblock.fs_fsize > MAXBSIZE) { 193107412Smckusick printf("decreasing fragment size from %d to maximum (%d)\n", 194107412Smckusick sblock.fs_fsize, MAXBSIZE); 195107412Smckusick sblock.fs_fsize = MAXBSIZE; 196107412Smckusick } 1971558Srgrimes if (sblock.fs_bsize < sblock.fs_fsize) { 19893775Sbde printf("increasing block size from %d to fragment size (%d)\n", 19992532Sbde sblock.fs_bsize, sblock.fs_fsize); 20093737Sphk sblock.fs_bsize = sblock.fs_fsize; 2011558Srgrimes } 20293737Sphk if (sblock.fs_fsize * MAXFRAG < sblock.fs_bsize) { 20393775Sbde printf( 20493775Sbde "increasing fragment size from %d to block size / %d (%d)\n", 20593737Sphk sblock.fs_fsize, MAXFRAG, sblock.fs_bsize / MAXFRAG); 20693737Sphk sblock.fs_fsize = sblock.fs_bsize / MAXFRAG; 20793737Sphk } 20898542Smckusick if (maxbsize < bsize || !POWEROF2(maxbsize)) { 20998542Smckusick sblock.fs_maxbsize = sblock.fs_bsize; 21098542Smckusick printf("Extent size set to %d\n", sblock.fs_maxbsize); 21198542Smckusick } else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) { 21298542Smckusick sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize; 21398542Smckusick printf("Extent size reduced to %d\n", sblock.fs_maxbsize); 21498542Smckusick } else { 21598542Smckusick sblock.fs_maxbsize = maxbsize; 21698542Smckusick } 21798542Smckusick sblock.fs_maxcontig = maxcontig; 21898542Smckusick if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) { 21998542Smckusick sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize; 22098542Smckusick printf("Maxcontig raised to %d\n", sblock.fs_maxbsize); 22198542Smckusick } 22298542Smckusick if (sblock.fs_maxcontig > 1) 22398542Smckusick sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG); 2241558Srgrimes sblock.fs_bmask = ~(sblock.fs_bsize - 1); 2251558Srgrimes sblock.fs_fmask = ~(sblock.fs_fsize - 1); 2261558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2271558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 22892712Siedowse sblock.fs_bshift = ilog2(sblock.fs_bsize); 22992712Siedowse sblock.fs_fshift = ilog2(sblock.fs_fsize); 2301558Srgrimes sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); 23192712Siedowse sblock.fs_fragshift = ilog2(sblock.fs_frag); 2321558Srgrimes if (sblock.fs_frag > MAXFRAG) { 23393775Sbde printf("fragment size %d is still too small (can't happen)\n", 2341558Srgrimes sblock.fs_bsize / MAXFRAG); 2351558Srgrimes exit(21); 2361558Srgrimes } 23798542Smckusick sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize); 23898542Smckusick sblock.fs_size = fssize = dbtofsb(&sblock, fssize); 239134011Sjhb 240134011Sjhb /* 241134011Sjhb * Before the filesystem is finally initialized, mark it 242134011Sjhb * as incompletely initialized. 243134011Sjhb */ 244134011Sjhb sblock.fs_magic = FS_BAD_MAGIC; 245134011Sjhb 24698542Smckusick if (Oflag == 1) { 247107294Smckusick sblock.fs_sblockloc = SBLOCK_UFS1; 24898542Smckusick sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs1_daddr_t); 24998542Smckusick sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode); 25098542Smckusick sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * 25198542Smckusick sizeof(ufs1_daddr_t)); 25298542Smckusick sblock.fs_old_inodefmt = FS_44INODEFMT; 25398542Smckusick sblock.fs_old_cgoffset = 0; 25498542Smckusick sblock.fs_old_cgmask = 0xffffffff; 25598542Smckusick sblock.fs_old_size = sblock.fs_size; 25698542Smckusick sblock.fs_old_rotdelay = 0; 25798542Smckusick sblock.fs_old_rps = 60; 25898542Smckusick sblock.fs_old_nspf = sblock.fs_fsize / sectorsize; 25998542Smckusick sblock.fs_old_cpg = 1; 26098542Smckusick sblock.fs_old_interleave = 1; 26198542Smckusick sblock.fs_old_trackskew = 0; 26298542Smckusick sblock.fs_old_cpc = 0; 26398542Smckusick sblock.fs_old_postblformat = 1; 26498542Smckusick sblock.fs_old_nrpos = 1; 26598542Smckusick } else { 266107294Smckusick sblock.fs_sblockloc = SBLOCK_UFS2; 26798542Smckusick sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs2_daddr_t); 26898542Smckusick sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode); 26998542Smckusick sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * 27098542Smckusick sizeof(ufs2_daddr_t)); 27198542Smckusick } 2721558Srgrimes sblock.fs_sblkno = 273107294Smckusick roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize), 274107294Smckusick sblock.fs_frag); 27598542Smckusick sblock.fs_cblkno = sblock.fs_sblkno + 27698542Smckusick roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag); 2771558Srgrimes sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; 2781558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2791558Srgrimes for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) { 2801558Srgrimes sizepb *= NINDIR(&sblock); 2811558Srgrimes sblock.fs_maxfilesize += sizepb; 2821558Srgrimes } 283142119Sdelphij 2841558Srgrimes /* 285142119Sdelphij * It's impossible to create a snapshot in case that fs_maxfilesize 286142119Sdelphij * is smaller than the fssize. 287142119Sdelphij */ 288142119Sdelphij if (sblock.fs_maxfilesize < (u_quad_t)fssize) { 289142119Sdelphij warnx("WARNING: You will be unable to create snapshots on this " 290142119Sdelphij "file system. Correct by using a larger blocksize."); 291142119Sdelphij } 292142119Sdelphij 293142119Sdelphij /* 29498542Smckusick * Calculate the number of blocks to put into each cylinder group. 29598542Smckusick * 29698542Smckusick * This algorithm selects the number of blocks per cylinder 29798542Smckusick * group. The first goal is to have at least enough data blocks 29898542Smckusick * in each cylinder group to meet the density requirement. Once 29998542Smckusick * this goal is achieved we try to expand to have at least 30098542Smckusick * MINCYLGRPS cylinder groups. Once this goal is achieved, we 30198542Smckusick * pack as many blocks into each cylinder group map as will fit. 30298542Smckusick * 30398542Smckusick * We start by calculating the smallest number of blocks that we 30498542Smckusick * can put into each cylinder group. If this is too big, we reduce 30598542Smckusick * the density until it fits. 3061558Srgrimes */ 30798542Smckusick origdensity = density; 30898542Smckusick for (;;) { 309107412Smckusick fragsperinode = MAX(numfrags(&sblock, density), 1); 31098542Smckusick minfpg = fragsperinode * INOPB(&sblock); 31198542Smckusick if (minfpg > sblock.fs_size) 31298542Smckusick minfpg = sblock.fs_size; 31398542Smckusick sblock.fs_ipg = INOPB(&sblock); 31498542Smckusick sblock.fs_fpg = roundup(sblock.fs_iblkno + 31598542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 31698542Smckusick if (sblock.fs_fpg < minfpg) 31798542Smckusick sblock.fs_fpg = minfpg; 31898542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 31998542Smckusick INOPB(&sblock)); 32098542Smckusick sblock.fs_fpg = roundup(sblock.fs_iblkno + 32198542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 32298542Smckusick if (sblock.fs_fpg < minfpg) 32398542Smckusick sblock.fs_fpg = minfpg; 32498542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 32598542Smckusick INOPB(&sblock)); 32698542Smckusick if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 32798542Smckusick break; 32898542Smckusick density -= sblock.fs_fsize; 3291558Srgrimes } 33098542Smckusick if (density != origdensity) 33198542Smckusick printf("density reduced from %d to %d\n", origdensity, density); 3321558Srgrimes /* 33398542Smckusick * Start packing more blocks into the cylinder group until 33498542Smckusick * it cannot grow any larger, the number of cylinder groups 33598542Smckusick * drops below MINCYLGRPS, or we reach the size requested. 3361558Srgrimes */ 33798542Smckusick for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) { 33898542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 33998542Smckusick INOPB(&sblock)); 34098542Smckusick if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS) 3411558Srgrimes break; 34298542Smckusick if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 34398542Smckusick continue; 34498542Smckusick if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize) 3451558Srgrimes break; 34698542Smckusick sblock.fs_fpg -= sblock.fs_frag; 34798542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 34898542Smckusick INOPB(&sblock)); 34998542Smckusick break; 3501558Srgrimes } 3518871Srgrimes /* 35298542Smckusick * Check to be sure that the last cylinder group has enough blocks 35398542Smckusick * to be viable. If it is too small, reduce the number of blocks 35498542Smckusick * per cylinder group which will have the effect of moving more 35598542Smckusick * blocks into the last cylinder group. 3561558Srgrimes */ 35798542Smckusick optimalfpg = sblock.fs_fpg; 35898542Smckusick for (;;) { 35998542Smckusick sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); 36098542Smckusick lastminfpg = roundup(sblock.fs_iblkno + 36198542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 36298542Smckusick if (sblock.fs_size < lastminfpg) { 36399796Sbde printf("Filesystem size %jd < minimum size of %d\n", 36499796Sbde (intmax_t)sblock.fs_size, lastminfpg); 36598542Smckusick exit(28); 36698542Smckusick } 36798542Smckusick if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || 36898542Smckusick sblock.fs_size % sblock.fs_fpg == 0) 36998542Smckusick break; 37098542Smckusick sblock.fs_fpg -= sblock.fs_frag; 37198542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 37298542Smckusick INOPB(&sblock)); 3731558Srgrimes } 37498542Smckusick if (optimalfpg != sblock.fs_fpg) 37598542Smckusick printf("Reduced frags per cylinder group from %d to %d %s\n", 37698542Smckusick optimalfpg, sblock.fs_fpg, "to enlarge last cyl group"); 3771558Srgrimes sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); 3781558Srgrimes sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); 37998542Smckusick if (Oflag == 1) { 38098542Smckusick sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf; 38198542Smckusick sblock.fs_old_nsect = sblock.fs_old_spc; 38298542Smckusick sblock.fs_old_npsect = sblock.fs_old_spc; 38398542Smckusick sblock.fs_old_ncyl = sblock.fs_ncg; 3841558Srgrimes } 3851558Srgrimes /* 3861558Srgrimes * fill in remaining fields of the super block 3871558Srgrimes */ 3881558Srgrimes sblock.fs_csaddr = cgdmin(&sblock, 0); 3891558Srgrimes sblock.fs_cssize = 3901558Srgrimes fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); 3911558Srgrimes fscs = (struct csum *)calloc(1, sblock.fs_cssize); 39237664Scharnier if (fscs == NULL) 39337664Scharnier errx(31, "calloc failed"); 39498542Smckusick sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); 395105423Smckusick if (sblock.fs_sbsize > SBLOCKSIZE) 396105423Smckusick sblock.fs_sbsize = SBLOCKSIZE; 3971558Srgrimes sblock.fs_minfree = minfree; 3981558Srgrimes sblock.fs_maxbpg = maxbpg; 3991558Srgrimes sblock.fs_optim = opt; 4001558Srgrimes sblock.fs_cgrotor = 0; 40198542Smckusick sblock.fs_pendingblocks = 0; 40298542Smckusick sblock.fs_pendinginodes = 0; 4031558Srgrimes sblock.fs_fmod = 0; 4041558Srgrimes sblock.fs_ronly = 0; 40598542Smckusick sblock.fs_state = 0; 4062294Sdg sblock.fs_clean = 1; 40724149Sguido sblock.fs_id[0] = (long)utime; 408111268Smckusick sblock.fs_id[1] = newfs_random(); 40998542Smckusick sblock.fs_fsmnt[0] = '\0'; 41098542Smckusick csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); 41198542Smckusick sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - 41298542Smckusick sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); 41398542Smckusick sblock.fs_cstotal.cs_nbfree = 41498542Smckusick fragstoblks(&sblock, sblock.fs_dsize) - 41598542Smckusick howmany(csfrags, sblock.fs_frag); 41698542Smckusick sblock.fs_cstotal.cs_nffree = 41798542Smckusick fragnum(&sblock, sblock.fs_size) + 418107519Smckusick (fragnum(&sblock, csfrags) > 0 ? 419107519Smckusick sblock.fs_frag - fragnum(&sblock, csfrags) : 0); 42098542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 42198542Smckusick sblock.fs_cstotal.cs_ndir = 0; 42298542Smckusick sblock.fs_dsize -= csfrags; 42398542Smckusick sblock.fs_time = utime; 42498542Smckusick if (Oflag == 1) { 42598542Smckusick sblock.fs_old_time = utime; 42698542Smckusick sblock.fs_old_dsize = sblock.fs_dsize; 42798542Smckusick sblock.fs_old_csaddr = sblock.fs_csaddr; 42898542Smckusick sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 42998542Smckusick sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 43098542Smckusick sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 43198542Smckusick sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 43298542Smckusick } 43324149Sguido 4341558Srgrimes /* 435102231Strhodes * Dump out summary information about file system. 4361558Srgrimes */ 43798542Smckusick# define B2MBFACTOR (1 / (1024.0 * 1024.0)) 43899796Sbde printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n", 43998542Smckusick fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, 44099796Sbde (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, 44199796Sbde sblock.fs_fsize); 44298542Smckusick printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n", 44398542Smckusick sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, 44498542Smckusick sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); 44598542Smckusick if (sblock.fs_flags & FS_DOSOFTDEP) 44698542Smckusick printf("\twith soft updates\n"); 44798542Smckusick# undef B2MBFACTOR 448115235Sdougb 4491558Srgrimes /* 450115235Sdougb * Wipe out old UFS1 superblock(s) if necessary. 451115235Sdougb */ 452115235Sdougb if (!Nflag && Oflag != 1) { 453115235Sdougb i = bread(&disk, SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE); 454115235Sdougb if (i == -1) 455115235Sdougb err(1, "can't read old UFS1 superblock: %s", disk.d_error); 456115235Sdougb 457115235Sdougb if (fsdummy.fs_magic == FS_UFS1_MAGIC) { 458115235Sdougb fsdummy.fs_magic = 0; 459115235Sdougb bwrite(&disk, SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE); 460115235Sdougb for (i = 0; i < fsdummy.fs_ncg; i++) 461115235Sdougb bwrite(&disk, fsbtodb(&fsdummy, cgsblock(&fsdummy, i)), 462115235Sdougb chdummy, SBLOCKSIZE); 463115235Sdougb } 464115235Sdougb } 465122783Swes if (!Nflag) 466122783Swes sbwrite(&disk, 0); 467122785Swes if (Eflag == 1) { 468122785Swes printf("** Exiting on Eflag 1\n"); 469122785Swes exit(0); 470122785Swes } 471122785Swes if (Eflag == 2) 472122785Swes printf("** Leaving BAD MAGIC on Eflag 2\n"); 473134011Sjhb else 474134011Sjhb sblock.fs_magic = (Oflag != 1) ? FS_UFS2_MAGIC : FS_UFS1_MAGIC; 475115235Sdougb 476115235Sdougb /* 4771558Srgrimes * Now build the cylinders group blocks and 4781558Srgrimes * then print out indices of cylinder groups. 4791558Srgrimes */ 48077420Sphk printf("super-block backups (for fsck -b #) at:\n"); 48113769Sjoerg i = 0; 48213769Sjoerg width = charsperline(); 48398542Smckusick /* 484107412Smckusick * allocate space for superblock, cylinder group map, and 485107412Smckusick * two sets of inode blocks. 486107412Smckusick */ 487107412Smckusick if (sblock.fs_bsize < SBLOCKSIZE) 488107412Smckusick iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize; 489107412Smckusick else 490107412Smckusick iobufsize = 4 * sblock.fs_bsize; 491107412Smckusick if ((iobuf = malloc(iobufsize)) == 0) { 492107412Smckusick printf("Cannot allocate I/O buffer\n"); 493107412Smckusick exit(38); 494107412Smckusick } 495107412Smckusick bzero(iobuf, iobufsize); 496107412Smckusick /* 49798542Smckusick * Make a copy of the superblock into the buffer that we will be 49898542Smckusick * writing out in each cylinder group. 49998542Smckusick */ 50098542Smckusick bcopy((char *)&sblock, iobuf, SBLOCKSIZE); 5011558Srgrimes for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { 5021558Srgrimes initcg(cylno, utime); 50399796Sbde j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s", 50499796Sbde (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)), 50585860Sphk cylno < (sblock.fs_ncg-1) ? "," : ""); 50681980Sbrian if (j < 0) 50781980Sbrian tmpbuf[j = 0] = '\0'; 50837239Sbde if (i + j >= width) { 5091558Srgrimes printf("\n"); 51013769Sjoerg i = 0; 51113769Sjoerg } 51213769Sjoerg i += j; 51313769Sjoerg printf("%s", tmpbuf); 5148218Sdg fflush(stdout); 5151558Srgrimes } 51677420Sphk printf("\n"); 51777420Sphk if (Nflag) 5181558Srgrimes exit(0); 5191558Srgrimes /* 520102231Strhodes * Now construct the initial file system, 5211558Srgrimes * then write out the super-block. 5221558Srgrimes */ 5231558Srgrimes fsinit(utime); 52498542Smckusick if (Oflag == 1) { 52598542Smckusick sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 52698542Smckusick sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 52798542Smckusick sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 52898542Smckusick sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 52998542Smckusick } 530122785Swes if (Eflag == 3) { 531122785Swes printf("** Exiting on Eflag 3\n"); 532122785Swes exit(0); 533122785Swes } 534110671Sjmallett if (!Nflag) 535110671Sjmallett sbwrite(&disk, 0); 5361558Srgrimes for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) 5371558Srgrimes wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), 5381558Srgrimes sblock.fs_cssize - i < sblock.fs_bsize ? 53985860Sphk sblock.fs_cssize - i : sblock.fs_bsize, 5401558Srgrimes ((char *)fscs) + i); 5411558Srgrimes /* 5421558Srgrimes * Update information about this partion in pack 5431558Srgrimes * label, to that it may be updated on disk. 5441558Srgrimes */ 54595357Sphk if (pp != NULL) { 54695357Sphk pp->p_fstype = FS_BSDFFS; 54795357Sphk pp->p_fsize = sblock.fs_fsize; 54895357Sphk pp->p_frag = sblock.fs_frag; 54998542Smckusick pp->p_cpg = sblock.fs_fpg; 55095357Sphk } 5511558Srgrimes} 5521558Srgrimes 5531558Srgrimes/* 5541558Srgrimes * Initialize a cylinder group. 5551558Srgrimes */ 55637664Scharniervoid 55792711Siedowseinitcg(int cylno, time_t utime) 5581558Srgrimes{ 55998542Smckusick long i, j, d, dlower, dupper, blkno, start; 56098542Smckusick ufs2_daddr_t cbase, dmax; 56198542Smckusick struct ufs1_dinode *dp1; 56298542Smckusick struct ufs2_dinode *dp2; 56392483Sphk struct csum *cs; 5641558Srgrimes 5651558Srgrimes /* 5661558Srgrimes * Determine block bounds for cylinder group. 5671558Srgrimes * Allow space for super block summary information in first 5681558Srgrimes * cylinder group. 5691558Srgrimes */ 5701558Srgrimes cbase = cgbase(&sblock, cylno); 5711558Srgrimes dmax = cbase + sblock.fs_fpg; 5721558Srgrimes if (dmax > sblock.fs_size) 5731558Srgrimes dmax = sblock.fs_size; 5741558Srgrimes dlower = cgsblock(&sblock, cylno) - cbase; 5751558Srgrimes dupper = cgdmin(&sblock, cylno) - cbase; 5761558Srgrimes if (cylno == 0) 5771558Srgrimes dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); 57898542Smckusick cs = &fscs[cylno]; 57923682Speter memset(&acg, 0, sblock.fs_cgsize); 5801558Srgrimes acg.cg_time = utime; 5811558Srgrimes acg.cg_magic = CG_MAGIC; 5821558Srgrimes acg.cg_cgx = cylno; 5831558Srgrimes acg.cg_niblk = sblock.fs_ipg; 58498542Smckusick acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ? 58598542Smckusick sblock.fs_ipg : 2 * INOPB(&sblock); 5861558Srgrimes acg.cg_ndblk = dmax - cbase; 5871558Srgrimes if (sblock.fs_contigsumsize > 0) 5881558Srgrimes acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag; 58998542Smckusick start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield); 59098542Smckusick if (Oflag == 2) { 59198542Smckusick acg.cg_iusedoff = start; 59298542Smckusick } else { 59398542Smckusick acg.cg_old_ncyl = sblock.fs_old_cpg; 59498542Smckusick acg.cg_old_time = acg.cg_time; 59598542Smckusick acg.cg_time = 0; 59698542Smckusick acg.cg_old_niblk = acg.cg_niblk; 59798542Smckusick acg.cg_niblk = 0; 59898542Smckusick acg.cg_initediblk = 0; 59998542Smckusick acg.cg_old_btotoff = start; 60098542Smckusick acg.cg_old_boff = acg.cg_old_btotoff + 60198542Smckusick sblock.fs_old_cpg * sizeof(int32_t); 60298542Smckusick acg.cg_iusedoff = acg.cg_old_boff + 60398542Smckusick sblock.fs_old_cpg * sizeof(u_int16_t); 60498542Smckusick } 605103949Smike acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT); 606103949Smike acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT); 60798542Smckusick if (sblock.fs_contigsumsize > 0) { 6081558Srgrimes acg.cg_clustersumoff = 60998542Smckusick roundup(acg.cg_nextfreeoff, sizeof(u_int32_t)); 61098542Smckusick acg.cg_clustersumoff -= sizeof(u_int32_t); 6111558Srgrimes acg.cg_clusteroff = acg.cg_clustersumoff + 61238579Sdfr (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 61398542Smckusick acg.cg_nextfreeoff = acg.cg_clusteroff + 614103949Smike howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT); 6151558Srgrimes } 61698542Smckusick if (acg.cg_nextfreeoff > sblock.fs_cgsize) { 6171558Srgrimes printf("Panic: cylinder group too big\n"); 6181558Srgrimes exit(37); 6191558Srgrimes } 6201558Srgrimes acg.cg_cs.cs_nifree += sblock.fs_ipg; 6211558Srgrimes if (cylno == 0) 62298542Smckusick for (i = 0; i < (long)ROOTINO; i++) { 6231558Srgrimes setbit(cg_inosused(&acg), i); 6241558Srgrimes acg.cg_cs.cs_nifree--; 6251558Srgrimes } 6261558Srgrimes if (cylno > 0) { 6271558Srgrimes /* 6281558Srgrimes * In cylno 0, beginning space is reserved 6291558Srgrimes * for boot and super blocks. 6301558Srgrimes */ 6311558Srgrimes for (d = 0; d < dlower; d += sblock.fs_frag) { 6321558Srgrimes blkno = d / sblock.fs_frag; 6331558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 6341558Srgrimes if (sblock.fs_contigsumsize > 0) 6351558Srgrimes setbit(cg_clustersfree(&acg), blkno); 6361558Srgrimes acg.cg_cs.cs_nbfree++; 6371558Srgrimes } 6381558Srgrimes } 63937664Scharnier if ((i = dupper % sblock.fs_frag)) { 6401558Srgrimes acg.cg_frsum[sblock.fs_frag - i]++; 6411558Srgrimes for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { 6421558Srgrimes setbit(cg_blksfree(&acg), dupper); 6431558Srgrimes acg.cg_cs.cs_nffree++; 6441558Srgrimes } 6451558Srgrimes } 64698542Smckusick for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk; 64798542Smckusick d += sblock.fs_frag) { 6481558Srgrimes blkno = d / sblock.fs_frag; 6491558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 6501558Srgrimes if (sblock.fs_contigsumsize > 0) 6511558Srgrimes setbit(cg_clustersfree(&acg), blkno); 6521558Srgrimes acg.cg_cs.cs_nbfree++; 6531558Srgrimes } 65498542Smckusick if (d < acg.cg_ndblk) { 65598542Smckusick acg.cg_frsum[acg.cg_ndblk - d]++; 65698542Smckusick for (; d < acg.cg_ndblk; d++) { 6571558Srgrimes setbit(cg_blksfree(&acg), d); 6581558Srgrimes acg.cg_cs.cs_nffree++; 6591558Srgrimes } 6601558Srgrimes } 6611558Srgrimes if (sblock.fs_contigsumsize > 0) { 66223682Speter int32_t *sump = cg_clustersum(&acg); 6631558Srgrimes u_char *mapp = cg_clustersfree(&acg); 6641558Srgrimes int map = *mapp++; 6651558Srgrimes int bit = 1; 6661558Srgrimes int run = 0; 6671558Srgrimes 6681558Srgrimes for (i = 0; i < acg.cg_nclusterblks; i++) { 66985860Sphk if ((map & bit) != 0) 6701558Srgrimes run++; 67185860Sphk else if (run != 0) { 6721558Srgrimes if (run > sblock.fs_contigsumsize) 6731558Srgrimes run = sblock.fs_contigsumsize; 6741558Srgrimes sump[run]++; 6751558Srgrimes run = 0; 6761558Srgrimes } 677103949Smike if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1) 6781558Srgrimes bit <<= 1; 67985860Sphk else { 6801558Srgrimes map = *mapp++; 6811558Srgrimes bit = 1; 6821558Srgrimes } 6831558Srgrimes } 6841558Srgrimes if (run != 0) { 6851558Srgrimes if (run > sblock.fs_contigsumsize) 6861558Srgrimes run = sblock.fs_contigsumsize; 6871558Srgrimes sump[run]++; 6881558Srgrimes } 6891558Srgrimes } 6901558Srgrimes *cs = acg.cg_cs; 69198542Smckusick /* 69298542Smckusick * Write out the duplicate super block, the cylinder group map 69398542Smckusick * and two blocks worth of inodes in a single write. 69498542Smckusick */ 69598542Smckusick start = sblock.fs_bsize > SBLOCKSIZE ? sblock.fs_bsize : SBLOCKSIZE; 69698542Smckusick bcopy((char *)&acg, &iobuf[start], sblock.fs_cgsize); 69798542Smckusick start += sblock.fs_bsize; 69898542Smckusick dp1 = (struct ufs1_dinode *)(&iobuf[start]); 69998542Smckusick dp2 = (struct ufs2_dinode *)(&iobuf[start]); 70098542Smckusick for (i = 0; i < acg.cg_initediblk; i++) { 70198542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) { 702111268Smckusick dp1->di_gen = newfs_random(); 70398542Smckusick dp1++; 70498542Smckusick } else { 705111268Smckusick dp2->di_gen = newfs_random(); 70698542Smckusick dp2++; 70798542Smckusick } 70898542Smckusick } 70998542Smckusick wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf); 71098542Smckusick /* 711102231Strhodes * For the old file system, we have to initialize all the inodes. 71298542Smckusick */ 71398542Smckusick if (Oflag == 1) { 71498542Smckusick for (i = 2 * sblock.fs_frag; 71598542Smckusick i < sblock.fs_ipg / INOPF(&sblock); 71698542Smckusick i += sblock.fs_frag) { 71798542Smckusick dp1 = (struct ufs1_dinode *)(&iobuf[start]); 71898542Smckusick for (j = 0; j < INOPB(&sblock); j++) { 719111268Smckusick dp1->di_gen = newfs_random(); 72098542Smckusick dp1++; 72198542Smckusick } 72298542Smckusick wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), 72398542Smckusick sblock.fs_bsize, &iobuf[start]); 72498542Smckusick } 72598542Smckusick } 7261558Srgrimes} 7271558Srgrimes 7281558Srgrimes/* 729102231Strhodes * initialize the file system 7301558Srgrimes */ 731122037Smckusick#define ROOTLINKCNT 3 7321558Srgrimes 7331558Srgrimesstruct direct root_dir[] = { 7341558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 1, "." }, 7351558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 736122037Smckusick { ROOTINO + 1, sizeof(struct direct), DT_DIR, 5, ".snap" }, 7371558Srgrimes}; 7381558Srgrimes 739122037Smckusick#define SNAPLINKCNT 2 740122037Smckusick 741122037Smckusickstruct direct snap_dir[] = { 742122037Smckusick { ROOTINO + 1, sizeof(struct direct), DT_DIR, 1, "." }, 743122037Smckusick { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 744122037Smckusick}; 745122037Smckusick 74637664Scharniervoid 74792711Siedowsefsinit(time_t utime) 7481558Srgrimes{ 74998542Smckusick union dinode node; 750122037Smckusick struct group *grp; 751149048Siedowse gid_t gid; 752140603Swes int entries; 7531558Srgrimes 75498542Smckusick memset(&node, 0, sizeof node); 755149048Siedowse if ((grp = getgrnam("operator")) != NULL) { 756149048Siedowse gid = grp->gr_gid; 757149048Siedowse } else { 758149048Siedowse warnx("Cannot retrieve operator gid."); 759149048Siedowse gid = 0; 760149048Siedowse } 761140603Swes entries = (nflag) ? ROOTLINKCNT - 1: ROOTLINKCNT; 76298542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) { 76398542Smckusick /* 76498542Smckusick * initialize the node 76598542Smckusick */ 76698542Smckusick node.dp1.di_atime = utime; 76798542Smckusick node.dp1.di_mtime = utime; 76898542Smckusick node.dp1.di_ctime = utime; 76998542Smckusick /* 77098542Smckusick * create the root directory 77198542Smckusick */ 77298542Smckusick node.dp1.di_mode = IFDIR | UMASK; 773140603Swes node.dp1.di_nlink = entries; 774140603Swes node.dp1.di_size = makedir(root_dir, entries); 77598542Smckusick node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode); 77698542Smckusick node.dp1.di_blocks = 77798542Smckusick btodb(fragroundup(&sblock, node.dp1.di_size)); 77898542Smckusick wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize, 77998542Smckusick iobuf); 780122037Smckusick iput(&node, ROOTINO); 781140603Swes if (!nflag) { 782140603Swes /* 783140603Swes * create the .snap directory 784140603Swes */ 785140603Swes node.dp1.di_mode |= 020; 786149048Siedowse node.dp1.di_gid = gid; 787140603Swes node.dp1.di_nlink = SNAPLINKCNT; 788140603Swes node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT); 789140603Swes node.dp1.di_db[0] = 790140603Swes alloc(sblock.fs_fsize, node.dp1.di_mode); 791140603Swes node.dp1.di_blocks = 792140603Swes btodb(fragroundup(&sblock, node.dp1.di_size)); 793140603Swes wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), 794140603Swes sblock.fs_fsize, iobuf); 795140603Swes iput(&node, ROOTINO + 1); 796140603Swes } 79798542Smckusick } else { 79898542Smckusick /* 79998542Smckusick * initialize the node 80098542Smckusick */ 80198542Smckusick node.dp2.di_atime = utime; 80298542Smckusick node.dp2.di_mtime = utime; 80398542Smckusick node.dp2.di_ctime = utime; 804100231Sroberto node.dp2.di_birthtime = utime; 80598542Smckusick /* 80698542Smckusick * create the root directory 80798542Smckusick */ 80898542Smckusick node.dp2.di_mode = IFDIR | UMASK; 809140603Swes node.dp2.di_nlink = entries; 810140603Swes node.dp2.di_size = makedir(root_dir, entries); 81198542Smckusick node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode); 81298542Smckusick node.dp2.di_blocks = 81398542Smckusick btodb(fragroundup(&sblock, node.dp2.di_size)); 81498542Smckusick wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize, 81598542Smckusick iobuf); 816122037Smckusick iput(&node, ROOTINO); 817140603Swes if (!nflag) { 818140603Swes /* 819140603Swes * create the .snap directory 820140603Swes */ 821140603Swes node.dp2.di_mode |= 020; 822149048Siedowse node.dp2.di_gid = gid; 823140603Swes node.dp2.di_nlink = SNAPLINKCNT; 824140603Swes node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT); 825140603Swes node.dp2.di_db[0] = 826140603Swes alloc(sblock.fs_fsize, node.dp2.di_mode); 827140603Swes node.dp2.di_blocks = 828140603Swes btodb(fragroundup(&sblock, node.dp2.di_size)); 829140603Swes wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), 830140603Swes sblock.fs_fsize, iobuf); 831140603Swes iput(&node, ROOTINO + 1); 832140603Swes } 83398542Smckusick } 8341558Srgrimes} 8351558Srgrimes 8361558Srgrimes/* 83798542Smckusick * construct a set of directory entries in "iobuf". 8381558Srgrimes * return size of directory. 8391558Srgrimes */ 84037664Scharnierint 84192711Siedowsemakedir(struct direct *protodir, int entries) 8421558Srgrimes{ 8431558Srgrimes char *cp; 8441558Srgrimes int i, spcleft; 8451558Srgrimes 8461558Srgrimes spcleft = DIRBLKSIZ; 84798542Smckusick memset(iobuf, 0, DIRBLKSIZ); 84898542Smckusick for (cp = iobuf, i = 0; i < entries - 1; i++) { 8491558Srgrimes protodir[i].d_reclen = DIRSIZ(0, &protodir[i]); 85023682Speter memmove(cp, &protodir[i], protodir[i].d_reclen); 8511558Srgrimes cp += protodir[i].d_reclen; 8521558Srgrimes spcleft -= protodir[i].d_reclen; 8531558Srgrimes } 8541558Srgrimes protodir[i].d_reclen = spcleft; 85523682Speter memmove(cp, &protodir[i], DIRSIZ(0, &protodir[i])); 8561558Srgrimes return (DIRBLKSIZ); 8571558Srgrimes} 8581558Srgrimes 8591558Srgrimes/* 8601558Srgrimes * allocate a block or frag 8611558Srgrimes */ 86298542Smckusickufs2_daddr_t 86392711Siedowsealloc(int size, int mode) 8641558Srgrimes{ 86598542Smckusick int i, d, blkno, frag; 8661558Srgrimes 867110671Sjmallett bread(&disk, fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 868110671Sjmallett sblock.fs_cgsize); 8691558Srgrimes if (acg.cg_magic != CG_MAGIC) { 8701558Srgrimes printf("cg 0: bad magic number\n"); 871118493Syar exit(38); 8721558Srgrimes } 8731558Srgrimes if (acg.cg_cs.cs_nbfree == 0) { 8741558Srgrimes printf("first cylinder group ran out of space\n"); 875118493Syar exit(39); 8761558Srgrimes } 8771558Srgrimes for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) 8781558Srgrimes if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) 8791558Srgrimes goto goth; 8801558Srgrimes printf("internal error: can't find block in cyl 0\n"); 881118493Syar exit(40); 8821558Srgrimesgoth: 8831558Srgrimes blkno = fragstoblks(&sblock, d); 8841558Srgrimes clrblock(&sblock, cg_blksfree(&acg), blkno); 88523682Speter if (sblock.fs_contigsumsize > 0) 88623682Speter clrbit(cg_clustersfree(&acg), blkno); 8871558Srgrimes acg.cg_cs.cs_nbfree--; 8881558Srgrimes sblock.fs_cstotal.cs_nbfree--; 8891558Srgrimes fscs[0].cs_nbfree--; 8901558Srgrimes if (mode & IFDIR) { 8911558Srgrimes acg.cg_cs.cs_ndir++; 8921558Srgrimes sblock.fs_cstotal.cs_ndir++; 8931558Srgrimes fscs[0].cs_ndir++; 8941558Srgrimes } 8951558Srgrimes if (size != sblock.fs_bsize) { 8961558Srgrimes frag = howmany(size, sblock.fs_fsize); 8971558Srgrimes fscs[0].cs_nffree += sblock.fs_frag - frag; 8981558Srgrimes sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; 8991558Srgrimes acg.cg_cs.cs_nffree += sblock.fs_frag - frag; 9001558Srgrimes acg.cg_frsum[sblock.fs_frag - frag]++; 9011558Srgrimes for (i = frag; i < sblock.fs_frag; i++) 9021558Srgrimes setbit(cg_blksfree(&acg), d + i); 9031558Srgrimes } 904110671Sjmallett /* XXX cgwrite(&disk, 0)??? */ 9051558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 9061558Srgrimes (char *)&acg); 90798542Smckusick return ((ufs2_daddr_t)d); 9081558Srgrimes} 9091558Srgrimes 9101558Srgrimes/* 9111558Srgrimes * Allocate an inode on the disk 9121558Srgrimes */ 91337664Scharniervoid 91498542Smckusickiput(union dinode *ip, ino_t ino) 9151558Srgrimes{ 91698542Smckusick ufs2_daddr_t d; 9171558Srgrimes int c; 9181558Srgrimes 9191558Srgrimes c = ino_to_cg(&sblock, ino); 920110671Sjmallett bread(&disk, fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 921110671Sjmallett sblock.fs_cgsize); 9221558Srgrimes if (acg.cg_magic != CG_MAGIC) { 9231558Srgrimes printf("cg 0: bad magic number\n"); 9241558Srgrimes exit(31); 9251558Srgrimes } 9261558Srgrimes acg.cg_cs.cs_nifree--; 9271558Srgrimes setbit(cg_inosused(&acg), ino); 9281558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 9291558Srgrimes (char *)&acg); 9301558Srgrimes sblock.fs_cstotal.cs_nifree--; 9311558Srgrimes fscs[0].cs_nifree--; 93298542Smckusick if (ino >= (unsigned long)sblock.fs_ipg * sblock.fs_ncg) { 9331558Srgrimes printf("fsinit: inode value out of range (%d).\n", ino); 9341558Srgrimes exit(32); 9351558Srgrimes } 9361558Srgrimes d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino)); 937110671Sjmallett bread(&disk, d, (char *)iobuf, sblock.fs_bsize); 93898542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) 93998542Smckusick ((struct ufs1_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] = 94098542Smckusick ip->dp1; 94198542Smckusick else 94298542Smckusick ((struct ufs2_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] = 94398542Smckusick ip->dp2; 944110065Sjmallett wtfs(d, sblock.fs_bsize, (char *)iobuf); 9451558Srgrimes} 9461558Srgrimes 9471558Srgrimes/* 948110671Sjmallett * possibly write to disk 9491558Srgrimes */ 95093737Sphkstatic void 95198542Smckusickwtfs(ufs2_daddr_t bno, int size, char *bf) 9521558Srgrimes{ 9531558Srgrimes if (Nflag) 9541558Srgrimes return; 955114877Siedowse if (bwrite(&disk, bno, bf, size) < 0) 956114877Siedowse err(36, "wtfs: %d bytes at sector %jd", size, (intmax_t)bno); 9571558Srgrimes} 9581558Srgrimes 9591558Srgrimes/* 9601558Srgrimes * check if a block is available 9611558Srgrimes */ 96293737Sphkstatic int 96392711Siedowseisblock(struct fs *fs, unsigned char *cp, int h) 9641558Srgrimes{ 9651558Srgrimes unsigned char mask; 9661558Srgrimes 9671558Srgrimes switch (fs->fs_frag) { 9681558Srgrimes case 8: 9691558Srgrimes return (cp[h] == 0xff); 9701558Srgrimes case 4: 9711558Srgrimes mask = 0x0f << ((h & 0x1) << 2); 9721558Srgrimes return ((cp[h >> 1] & mask) == mask); 9731558Srgrimes case 2: 9741558Srgrimes mask = 0x03 << ((h & 0x3) << 1); 9751558Srgrimes return ((cp[h >> 2] & mask) == mask); 9761558Srgrimes case 1: 9771558Srgrimes mask = 0x01 << (h & 0x7); 9781558Srgrimes return ((cp[h >> 3] & mask) == mask); 9791558Srgrimes default: 9801558Srgrimes fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); 9811558Srgrimes return (0); 9821558Srgrimes } 9831558Srgrimes} 9841558Srgrimes 9851558Srgrimes/* 9861558Srgrimes * take a block out of the map 9871558Srgrimes */ 98893737Sphkstatic void 98992711Siedowseclrblock(struct fs *fs, unsigned char *cp, int h) 9901558Srgrimes{ 9911558Srgrimes switch ((fs)->fs_frag) { 9921558Srgrimes case 8: 9931558Srgrimes cp[h] = 0; 9941558Srgrimes return; 9951558Srgrimes case 4: 9961558Srgrimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 9971558Srgrimes return; 9981558Srgrimes case 2: 9991558Srgrimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 10001558Srgrimes return; 10011558Srgrimes case 1: 10021558Srgrimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 10031558Srgrimes return; 10041558Srgrimes default: 10051558Srgrimes fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); 10061558Srgrimes return; 10071558Srgrimes } 10081558Srgrimes} 10091558Srgrimes 10101558Srgrimes/* 10111558Srgrimes * put a block into the map 10121558Srgrimes */ 101393737Sphkstatic void 101492711Siedowsesetblock(struct fs *fs, unsigned char *cp, int h) 10151558Srgrimes{ 10161558Srgrimes switch (fs->fs_frag) { 10171558Srgrimes case 8: 10181558Srgrimes cp[h] = 0xff; 10191558Srgrimes return; 10201558Srgrimes case 4: 10211558Srgrimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 10221558Srgrimes return; 10231558Srgrimes case 2: 10241558Srgrimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 10251558Srgrimes return; 10261558Srgrimes case 1: 10271558Srgrimes cp[h >> 3] |= (0x01 << (h & 0x7)); 10281558Srgrimes return; 10291558Srgrimes default: 10301558Srgrimes fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); 10311558Srgrimes return; 10321558Srgrimes } 10331558Srgrimes} 103413637Sjoerg 103513637Sjoerg/* 103613769Sjoerg * Determine the number of characters in a 103713637Sjoerg * single line. 103813637Sjoerg */ 103913637Sjoerg 104013637Sjoergstatic int 104192717Sphkcharsperline(void) 104213637Sjoerg{ 104313769Sjoerg int columns; 104413637Sjoerg char *cp; 104513637Sjoerg struct winsize ws; 104613637Sjoerg 104713637Sjoerg columns = 0; 104813637Sjoerg if (ioctl(0, TIOCGWINSZ, &ws) != -1) 104913637Sjoerg columns = ws.ws_col; 105013637Sjoerg if (columns == 0 && (cp = getenv("COLUMNS"))) 105113637Sjoerg columns = atoi(cp); 105213637Sjoerg if (columns == 0) 105313637Sjoerg columns = 80; /* last resort */ 105485860Sphk return (columns); 105513637Sjoerg} 105692712Siedowse 105792712Siedowsestatic int 105892712Siedowseilog2(int val) 105992712Siedowse{ 106092763Sphk u_int n; 106192712Siedowse 1062103949Smike for (n = 0; n < sizeof(n) * CHAR_BIT; n++) 106392712Siedowse if (1 << n == val) 106492712Siedowse return (n); 106592712Siedowse errx(1, "ilog2: %d is not a power of 2\n", val); 106692712Siedowse} 1067111268Smckusick 1068111268Smckusick/* 1069111268Smckusick * For the regression test, return predictable random values. 1070111268Smckusick * Otherwise use a true random number generator. 1071111268Smckusick */ 1072111268Smckusickstatic u_int32_t 1073111268Smckusicknewfs_random(void) 1074111268Smckusick{ 1075111268Smckusick static int nextnum = 1; 1076111268Smckusick 1077111268Smckusick if (Rflag) 1078111268Smckusick return (nextnum++); 1079111268Smckusick return (arc4random()); 1080111268Smckusick} 1081