mkfs.c revision 140603
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 140603 2005-01-21 22:20:25Z wes $"); 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 } 2831558Srgrimes /* 28498542Smckusick * Calculate the number of blocks to put into each cylinder group. 28598542Smckusick * 28698542Smckusick * This algorithm selects the number of blocks per cylinder 28798542Smckusick * group. The first goal is to have at least enough data blocks 28898542Smckusick * in each cylinder group to meet the density requirement. Once 28998542Smckusick * this goal is achieved we try to expand to have at least 29098542Smckusick * MINCYLGRPS cylinder groups. Once this goal is achieved, we 29198542Smckusick * pack as many blocks into each cylinder group map as will fit. 29298542Smckusick * 29398542Smckusick * We start by calculating the smallest number of blocks that we 29498542Smckusick * can put into each cylinder group. If this is too big, we reduce 29598542Smckusick * the density until it fits. 2961558Srgrimes */ 29798542Smckusick origdensity = density; 29898542Smckusick for (;;) { 299107412Smckusick fragsperinode = MAX(numfrags(&sblock, density), 1); 30098542Smckusick minfpg = fragsperinode * INOPB(&sblock); 30198542Smckusick if (minfpg > sblock.fs_size) 30298542Smckusick minfpg = sblock.fs_size; 30398542Smckusick sblock.fs_ipg = INOPB(&sblock); 30498542Smckusick sblock.fs_fpg = roundup(sblock.fs_iblkno + 30598542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 30698542Smckusick if (sblock.fs_fpg < minfpg) 30798542Smckusick sblock.fs_fpg = minfpg; 30898542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 30998542Smckusick INOPB(&sblock)); 31098542Smckusick sblock.fs_fpg = roundup(sblock.fs_iblkno + 31198542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 31298542Smckusick if (sblock.fs_fpg < minfpg) 31398542Smckusick sblock.fs_fpg = minfpg; 31498542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 31598542Smckusick INOPB(&sblock)); 31698542Smckusick if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 31798542Smckusick break; 31898542Smckusick density -= sblock.fs_fsize; 3191558Srgrimes } 32098542Smckusick if (density != origdensity) 32198542Smckusick printf("density reduced from %d to %d\n", origdensity, density); 3221558Srgrimes /* 32398542Smckusick * Start packing more blocks into the cylinder group until 32498542Smckusick * it cannot grow any larger, the number of cylinder groups 32598542Smckusick * drops below MINCYLGRPS, or we reach the size requested. 3261558Srgrimes */ 32798542Smckusick for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) { 32898542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 32998542Smckusick INOPB(&sblock)); 33098542Smckusick if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS) 3311558Srgrimes break; 33298542Smckusick if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 33398542Smckusick continue; 33498542Smckusick if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize) 3351558Srgrimes break; 33698542Smckusick sblock.fs_fpg -= sblock.fs_frag; 33798542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 33898542Smckusick INOPB(&sblock)); 33998542Smckusick break; 3401558Srgrimes } 3418871Srgrimes /* 34298542Smckusick * Check to be sure that the last cylinder group has enough blocks 34398542Smckusick * to be viable. If it is too small, reduce the number of blocks 34498542Smckusick * per cylinder group which will have the effect of moving more 34598542Smckusick * blocks into the last cylinder group. 3461558Srgrimes */ 34798542Smckusick optimalfpg = sblock.fs_fpg; 34898542Smckusick for (;;) { 34998542Smckusick sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); 35098542Smckusick lastminfpg = roundup(sblock.fs_iblkno + 35198542Smckusick sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 35298542Smckusick if (sblock.fs_size < lastminfpg) { 35399796Sbde printf("Filesystem size %jd < minimum size of %d\n", 35499796Sbde (intmax_t)sblock.fs_size, lastminfpg); 35598542Smckusick exit(28); 35698542Smckusick } 35798542Smckusick if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || 35898542Smckusick sblock.fs_size % sblock.fs_fpg == 0) 35998542Smckusick break; 36098542Smckusick sblock.fs_fpg -= sblock.fs_frag; 36198542Smckusick sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 36298542Smckusick INOPB(&sblock)); 3631558Srgrimes } 36498542Smckusick if (optimalfpg != sblock.fs_fpg) 36598542Smckusick printf("Reduced frags per cylinder group from %d to %d %s\n", 36698542Smckusick optimalfpg, sblock.fs_fpg, "to enlarge last cyl group"); 3671558Srgrimes sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); 3681558Srgrimes sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); 36998542Smckusick if (Oflag == 1) { 37098542Smckusick sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf; 37198542Smckusick sblock.fs_old_nsect = sblock.fs_old_spc; 37298542Smckusick sblock.fs_old_npsect = sblock.fs_old_spc; 37398542Smckusick sblock.fs_old_ncyl = sblock.fs_ncg; 3741558Srgrimes } 3751558Srgrimes /* 3761558Srgrimes * fill in remaining fields of the super block 3771558Srgrimes */ 3781558Srgrimes sblock.fs_csaddr = cgdmin(&sblock, 0); 3791558Srgrimes sblock.fs_cssize = 3801558Srgrimes fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); 3811558Srgrimes fscs = (struct csum *)calloc(1, sblock.fs_cssize); 38237664Scharnier if (fscs == NULL) 38337664Scharnier errx(31, "calloc failed"); 38498542Smckusick sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); 385105423Smckusick if (sblock.fs_sbsize > SBLOCKSIZE) 386105423Smckusick sblock.fs_sbsize = SBLOCKSIZE; 3871558Srgrimes sblock.fs_minfree = minfree; 3881558Srgrimes sblock.fs_maxbpg = maxbpg; 3891558Srgrimes sblock.fs_optim = opt; 3901558Srgrimes sblock.fs_cgrotor = 0; 39198542Smckusick sblock.fs_pendingblocks = 0; 39298542Smckusick sblock.fs_pendinginodes = 0; 3931558Srgrimes sblock.fs_fmod = 0; 3941558Srgrimes sblock.fs_ronly = 0; 39598542Smckusick sblock.fs_state = 0; 3962294Sdg sblock.fs_clean = 1; 39724149Sguido sblock.fs_id[0] = (long)utime; 398111268Smckusick sblock.fs_id[1] = newfs_random(); 39998542Smckusick sblock.fs_fsmnt[0] = '\0'; 40098542Smckusick csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); 40198542Smckusick sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - 40298542Smckusick sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); 40398542Smckusick sblock.fs_cstotal.cs_nbfree = 40498542Smckusick fragstoblks(&sblock, sblock.fs_dsize) - 40598542Smckusick howmany(csfrags, sblock.fs_frag); 40698542Smckusick sblock.fs_cstotal.cs_nffree = 40798542Smckusick fragnum(&sblock, sblock.fs_size) + 408107519Smckusick (fragnum(&sblock, csfrags) > 0 ? 409107519Smckusick sblock.fs_frag - fragnum(&sblock, csfrags) : 0); 41098542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 41198542Smckusick sblock.fs_cstotal.cs_ndir = 0; 41298542Smckusick sblock.fs_dsize -= csfrags; 41398542Smckusick sblock.fs_time = utime; 41498542Smckusick if (Oflag == 1) { 41598542Smckusick sblock.fs_old_time = utime; 41698542Smckusick sblock.fs_old_dsize = sblock.fs_dsize; 41798542Smckusick sblock.fs_old_csaddr = sblock.fs_csaddr; 41898542Smckusick sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 41998542Smckusick sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 42098542Smckusick sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 42198542Smckusick sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 42298542Smckusick } 42324149Sguido 4241558Srgrimes /* 425102231Strhodes * Dump out summary information about file system. 4261558Srgrimes */ 42798542Smckusick# define B2MBFACTOR (1 / (1024.0 * 1024.0)) 42899796Sbde printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n", 42998542Smckusick fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, 43099796Sbde (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, 43199796Sbde sblock.fs_fsize); 43298542Smckusick printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n", 43398542Smckusick sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, 43498542Smckusick sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); 43598542Smckusick if (sblock.fs_flags & FS_DOSOFTDEP) 43698542Smckusick printf("\twith soft updates\n"); 43798542Smckusick# undef B2MBFACTOR 438115235Sdougb 4391558Srgrimes /* 440115235Sdougb * Wipe out old UFS1 superblock(s) if necessary. 441115235Sdougb */ 442115235Sdougb if (!Nflag && Oflag != 1) { 443115235Sdougb i = bread(&disk, SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE); 444115235Sdougb if (i == -1) 445115235Sdougb err(1, "can't read old UFS1 superblock: %s", disk.d_error); 446115235Sdougb 447115235Sdougb if (fsdummy.fs_magic == FS_UFS1_MAGIC) { 448115235Sdougb fsdummy.fs_magic = 0; 449115235Sdougb bwrite(&disk, SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE); 450115235Sdougb for (i = 0; i < fsdummy.fs_ncg; i++) 451115235Sdougb bwrite(&disk, fsbtodb(&fsdummy, cgsblock(&fsdummy, i)), 452115235Sdougb chdummy, SBLOCKSIZE); 453115235Sdougb } 454115235Sdougb } 455122783Swes if (!Nflag) 456122783Swes sbwrite(&disk, 0); 457122785Swes if (Eflag == 1) { 458122785Swes printf("** Exiting on Eflag 1\n"); 459122785Swes exit(0); 460122785Swes } 461122785Swes if (Eflag == 2) 462122785Swes printf("** Leaving BAD MAGIC on Eflag 2\n"); 463134011Sjhb else 464134011Sjhb sblock.fs_magic = (Oflag != 1) ? FS_UFS2_MAGIC : FS_UFS1_MAGIC; 465115235Sdougb 466115235Sdougb /* 4671558Srgrimes * Now build the cylinders group blocks and 4681558Srgrimes * then print out indices of cylinder groups. 4691558Srgrimes */ 47077420Sphk printf("super-block backups (for fsck -b #) at:\n"); 47113769Sjoerg i = 0; 47213769Sjoerg width = charsperline(); 47398542Smckusick /* 474107412Smckusick * allocate space for superblock, cylinder group map, and 475107412Smckusick * two sets of inode blocks. 476107412Smckusick */ 477107412Smckusick if (sblock.fs_bsize < SBLOCKSIZE) 478107412Smckusick iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize; 479107412Smckusick else 480107412Smckusick iobufsize = 4 * sblock.fs_bsize; 481107412Smckusick if ((iobuf = malloc(iobufsize)) == 0) { 482107412Smckusick printf("Cannot allocate I/O buffer\n"); 483107412Smckusick exit(38); 484107412Smckusick } 485107412Smckusick bzero(iobuf, iobufsize); 486107412Smckusick /* 48798542Smckusick * Make a copy of the superblock into the buffer that we will be 48898542Smckusick * writing out in each cylinder group. 48998542Smckusick */ 49098542Smckusick bcopy((char *)&sblock, iobuf, SBLOCKSIZE); 4911558Srgrimes for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { 4921558Srgrimes initcg(cylno, utime); 49399796Sbde j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s", 49499796Sbde (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)), 49585860Sphk cylno < (sblock.fs_ncg-1) ? "," : ""); 49681980Sbrian if (j < 0) 49781980Sbrian tmpbuf[j = 0] = '\0'; 49837239Sbde if (i + j >= width) { 4991558Srgrimes printf("\n"); 50013769Sjoerg i = 0; 50113769Sjoerg } 50213769Sjoerg i += j; 50313769Sjoerg printf("%s", tmpbuf); 5048218Sdg fflush(stdout); 5051558Srgrimes } 50677420Sphk printf("\n"); 50777420Sphk if (Nflag) 5081558Srgrimes exit(0); 5091558Srgrimes /* 510102231Strhodes * Now construct the initial file system, 5111558Srgrimes * then write out the super-block. 5121558Srgrimes */ 5131558Srgrimes fsinit(utime); 51498542Smckusick if (Oflag == 1) { 51598542Smckusick sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 51698542Smckusick sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 51798542Smckusick sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 51898542Smckusick sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 51998542Smckusick } 520122785Swes if (Eflag == 3) { 521122785Swes printf("** Exiting on Eflag 3\n"); 522122785Swes exit(0); 523122785Swes } 524110671Sjmallett if (!Nflag) 525110671Sjmallett sbwrite(&disk, 0); 5261558Srgrimes for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) 5271558Srgrimes wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), 5281558Srgrimes sblock.fs_cssize - i < sblock.fs_bsize ? 52985860Sphk sblock.fs_cssize - i : sblock.fs_bsize, 5301558Srgrimes ((char *)fscs) + i); 5311558Srgrimes /* 5321558Srgrimes * Update information about this partion in pack 5331558Srgrimes * label, to that it may be updated on disk. 5341558Srgrimes */ 53595357Sphk if (pp != NULL) { 53695357Sphk pp->p_fstype = FS_BSDFFS; 53795357Sphk pp->p_fsize = sblock.fs_fsize; 53895357Sphk pp->p_frag = sblock.fs_frag; 53998542Smckusick pp->p_cpg = sblock.fs_fpg; 54095357Sphk } 5411558Srgrimes} 5421558Srgrimes 5431558Srgrimes/* 5441558Srgrimes * Initialize a cylinder group. 5451558Srgrimes */ 54637664Scharniervoid 54792711Siedowseinitcg(int cylno, time_t utime) 5481558Srgrimes{ 54998542Smckusick long i, j, d, dlower, dupper, blkno, start; 55098542Smckusick ufs2_daddr_t cbase, dmax; 55198542Smckusick struct ufs1_dinode *dp1; 55298542Smckusick struct ufs2_dinode *dp2; 55392483Sphk struct csum *cs; 5541558Srgrimes 5551558Srgrimes /* 5561558Srgrimes * Determine block bounds for cylinder group. 5571558Srgrimes * Allow space for super block summary information in first 5581558Srgrimes * cylinder group. 5591558Srgrimes */ 5601558Srgrimes cbase = cgbase(&sblock, cylno); 5611558Srgrimes dmax = cbase + sblock.fs_fpg; 5621558Srgrimes if (dmax > sblock.fs_size) 5631558Srgrimes dmax = sblock.fs_size; 5641558Srgrimes dlower = cgsblock(&sblock, cylno) - cbase; 5651558Srgrimes dupper = cgdmin(&sblock, cylno) - cbase; 5661558Srgrimes if (cylno == 0) 5671558Srgrimes dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); 56898542Smckusick cs = &fscs[cylno]; 56923682Speter memset(&acg, 0, sblock.fs_cgsize); 5701558Srgrimes acg.cg_time = utime; 5711558Srgrimes acg.cg_magic = CG_MAGIC; 5721558Srgrimes acg.cg_cgx = cylno; 5731558Srgrimes acg.cg_niblk = sblock.fs_ipg; 57498542Smckusick acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ? 57598542Smckusick sblock.fs_ipg : 2 * INOPB(&sblock); 5761558Srgrimes acg.cg_ndblk = dmax - cbase; 5771558Srgrimes if (sblock.fs_contigsumsize > 0) 5781558Srgrimes acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag; 57998542Smckusick start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield); 58098542Smckusick if (Oflag == 2) { 58198542Smckusick acg.cg_iusedoff = start; 58298542Smckusick } else { 58398542Smckusick acg.cg_old_ncyl = sblock.fs_old_cpg; 58498542Smckusick acg.cg_old_time = acg.cg_time; 58598542Smckusick acg.cg_time = 0; 58698542Smckusick acg.cg_old_niblk = acg.cg_niblk; 58798542Smckusick acg.cg_niblk = 0; 58898542Smckusick acg.cg_initediblk = 0; 58998542Smckusick acg.cg_old_btotoff = start; 59098542Smckusick acg.cg_old_boff = acg.cg_old_btotoff + 59198542Smckusick sblock.fs_old_cpg * sizeof(int32_t); 59298542Smckusick acg.cg_iusedoff = acg.cg_old_boff + 59398542Smckusick sblock.fs_old_cpg * sizeof(u_int16_t); 59498542Smckusick } 595103949Smike acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT); 596103949Smike acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT); 59798542Smckusick if (sblock.fs_contigsumsize > 0) { 5981558Srgrimes acg.cg_clustersumoff = 59998542Smckusick roundup(acg.cg_nextfreeoff, sizeof(u_int32_t)); 60098542Smckusick acg.cg_clustersumoff -= sizeof(u_int32_t); 6011558Srgrimes acg.cg_clusteroff = acg.cg_clustersumoff + 60238579Sdfr (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 60398542Smckusick acg.cg_nextfreeoff = acg.cg_clusteroff + 604103949Smike howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT); 6051558Srgrimes } 60698542Smckusick if (acg.cg_nextfreeoff > sblock.fs_cgsize) { 6071558Srgrimes printf("Panic: cylinder group too big\n"); 6081558Srgrimes exit(37); 6091558Srgrimes } 6101558Srgrimes acg.cg_cs.cs_nifree += sblock.fs_ipg; 6111558Srgrimes if (cylno == 0) 61298542Smckusick for (i = 0; i < (long)ROOTINO; i++) { 6131558Srgrimes setbit(cg_inosused(&acg), i); 6141558Srgrimes acg.cg_cs.cs_nifree--; 6151558Srgrimes } 6161558Srgrimes if (cylno > 0) { 6171558Srgrimes /* 6181558Srgrimes * In cylno 0, beginning space is reserved 6191558Srgrimes * for boot and super blocks. 6201558Srgrimes */ 6211558Srgrimes for (d = 0; d < dlower; d += sblock.fs_frag) { 6221558Srgrimes blkno = d / sblock.fs_frag; 6231558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 6241558Srgrimes if (sblock.fs_contigsumsize > 0) 6251558Srgrimes setbit(cg_clustersfree(&acg), blkno); 6261558Srgrimes acg.cg_cs.cs_nbfree++; 6271558Srgrimes } 6281558Srgrimes } 62937664Scharnier if ((i = dupper % sblock.fs_frag)) { 6301558Srgrimes acg.cg_frsum[sblock.fs_frag - i]++; 6311558Srgrimes for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { 6321558Srgrimes setbit(cg_blksfree(&acg), dupper); 6331558Srgrimes acg.cg_cs.cs_nffree++; 6341558Srgrimes } 6351558Srgrimes } 63698542Smckusick for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk; 63798542Smckusick d += sblock.fs_frag) { 6381558Srgrimes blkno = d / sblock.fs_frag; 6391558Srgrimes setblock(&sblock, cg_blksfree(&acg), blkno); 6401558Srgrimes if (sblock.fs_contigsumsize > 0) 6411558Srgrimes setbit(cg_clustersfree(&acg), blkno); 6421558Srgrimes acg.cg_cs.cs_nbfree++; 6431558Srgrimes } 64498542Smckusick if (d < acg.cg_ndblk) { 64598542Smckusick acg.cg_frsum[acg.cg_ndblk - d]++; 64698542Smckusick for (; d < acg.cg_ndblk; d++) { 6471558Srgrimes setbit(cg_blksfree(&acg), d); 6481558Srgrimes acg.cg_cs.cs_nffree++; 6491558Srgrimes } 6501558Srgrimes } 6511558Srgrimes if (sblock.fs_contigsumsize > 0) { 65223682Speter int32_t *sump = cg_clustersum(&acg); 6531558Srgrimes u_char *mapp = cg_clustersfree(&acg); 6541558Srgrimes int map = *mapp++; 6551558Srgrimes int bit = 1; 6561558Srgrimes int run = 0; 6571558Srgrimes 6581558Srgrimes for (i = 0; i < acg.cg_nclusterblks; i++) { 65985860Sphk if ((map & bit) != 0) 6601558Srgrimes run++; 66185860Sphk else if (run != 0) { 6621558Srgrimes if (run > sblock.fs_contigsumsize) 6631558Srgrimes run = sblock.fs_contigsumsize; 6641558Srgrimes sump[run]++; 6651558Srgrimes run = 0; 6661558Srgrimes } 667103949Smike if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1) 6681558Srgrimes bit <<= 1; 66985860Sphk else { 6701558Srgrimes map = *mapp++; 6711558Srgrimes bit = 1; 6721558Srgrimes } 6731558Srgrimes } 6741558Srgrimes if (run != 0) { 6751558Srgrimes if (run > sblock.fs_contigsumsize) 6761558Srgrimes run = sblock.fs_contigsumsize; 6771558Srgrimes sump[run]++; 6781558Srgrimes } 6791558Srgrimes } 6801558Srgrimes *cs = acg.cg_cs; 68198542Smckusick /* 68298542Smckusick * Write out the duplicate super block, the cylinder group map 68398542Smckusick * and two blocks worth of inodes in a single write. 68498542Smckusick */ 68598542Smckusick start = sblock.fs_bsize > SBLOCKSIZE ? sblock.fs_bsize : SBLOCKSIZE; 68698542Smckusick bcopy((char *)&acg, &iobuf[start], sblock.fs_cgsize); 68798542Smckusick start += sblock.fs_bsize; 68898542Smckusick dp1 = (struct ufs1_dinode *)(&iobuf[start]); 68998542Smckusick dp2 = (struct ufs2_dinode *)(&iobuf[start]); 69098542Smckusick for (i = 0; i < acg.cg_initediblk; i++) { 69198542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) { 692111268Smckusick dp1->di_gen = newfs_random(); 69398542Smckusick dp1++; 69498542Smckusick } else { 695111268Smckusick dp2->di_gen = newfs_random(); 69698542Smckusick dp2++; 69798542Smckusick } 69898542Smckusick } 69998542Smckusick wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf); 70098542Smckusick /* 701102231Strhodes * For the old file system, we have to initialize all the inodes. 70298542Smckusick */ 70398542Smckusick if (Oflag == 1) { 70498542Smckusick for (i = 2 * sblock.fs_frag; 70598542Smckusick i < sblock.fs_ipg / INOPF(&sblock); 70698542Smckusick i += sblock.fs_frag) { 70798542Smckusick dp1 = (struct ufs1_dinode *)(&iobuf[start]); 70898542Smckusick for (j = 0; j < INOPB(&sblock); j++) { 709111268Smckusick dp1->di_gen = newfs_random(); 71098542Smckusick dp1++; 71198542Smckusick } 71298542Smckusick wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), 71398542Smckusick sblock.fs_bsize, &iobuf[start]); 71498542Smckusick } 71598542Smckusick } 7161558Srgrimes} 7171558Srgrimes 7181558Srgrimes/* 719102231Strhodes * initialize the file system 7201558Srgrimes */ 721122037Smckusick#define ROOTLINKCNT 3 7221558Srgrimes 7231558Srgrimesstruct direct root_dir[] = { 7241558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 1, "." }, 7251558Srgrimes { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 726122037Smckusick { ROOTINO + 1, sizeof(struct direct), DT_DIR, 5, ".snap" }, 7271558Srgrimes}; 7281558Srgrimes 729122037Smckusick#define SNAPLINKCNT 2 730122037Smckusick 731122037Smckusickstruct direct snap_dir[] = { 732122037Smckusick { ROOTINO + 1, sizeof(struct direct), DT_DIR, 1, "." }, 733122037Smckusick { ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 734122037Smckusick}; 735122037Smckusick 73637664Scharniervoid 73792711Siedowsefsinit(time_t utime) 7381558Srgrimes{ 73998542Smckusick union dinode node; 740122037Smckusick struct group *grp; 741140603Swes int entries; 7421558Srgrimes 74398542Smckusick memset(&node, 0, sizeof node); 744122037Smckusick if ((grp = getgrnam("operator")) == NULL) 745122037Smckusick errx(35, "Cannot retrieve operator gid"); 746140603Swes entries = (nflag) ? ROOTLINKCNT - 1: ROOTLINKCNT; 74798542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) { 74898542Smckusick /* 74998542Smckusick * initialize the node 75098542Smckusick */ 75198542Smckusick node.dp1.di_atime = utime; 75298542Smckusick node.dp1.di_mtime = utime; 75398542Smckusick node.dp1.di_ctime = utime; 75498542Smckusick /* 75598542Smckusick * create the root directory 75698542Smckusick */ 75798542Smckusick node.dp1.di_mode = IFDIR | UMASK; 758140603Swes node.dp1.di_nlink = entries; 759140603Swes node.dp1.di_size = makedir(root_dir, entries); 76098542Smckusick node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode); 76198542Smckusick node.dp1.di_blocks = 76298542Smckusick btodb(fragroundup(&sblock, node.dp1.di_size)); 76398542Smckusick wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize, 76498542Smckusick iobuf); 765122037Smckusick iput(&node, ROOTINO); 766140603Swes if (!nflag) { 767140603Swes /* 768140603Swes * create the .snap directory 769140603Swes */ 770140603Swes node.dp1.di_mode |= 020; 771140603Swes node.dp1.di_gid = grp->gr_gid; 772140603Swes node.dp1.di_nlink = SNAPLINKCNT; 773140603Swes node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT); 774140603Swes node.dp1.di_db[0] = 775140603Swes alloc(sblock.fs_fsize, node.dp1.di_mode); 776140603Swes node.dp1.di_blocks = 777140603Swes btodb(fragroundup(&sblock, node.dp1.di_size)); 778140603Swes wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), 779140603Swes sblock.fs_fsize, iobuf); 780140603Swes iput(&node, ROOTINO + 1); 781140603Swes } 78298542Smckusick } else { 78398542Smckusick /* 78498542Smckusick * initialize the node 78598542Smckusick */ 78698542Smckusick node.dp2.di_atime = utime; 78798542Smckusick node.dp2.di_mtime = utime; 78898542Smckusick node.dp2.di_ctime = utime; 789100231Sroberto node.dp2.di_birthtime = utime; 79098542Smckusick /* 79198542Smckusick * create the root directory 79298542Smckusick */ 79398542Smckusick node.dp2.di_mode = IFDIR | UMASK; 794140603Swes node.dp2.di_nlink = entries; 795140603Swes node.dp2.di_size = makedir(root_dir, entries); 79698542Smckusick node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode); 79798542Smckusick node.dp2.di_blocks = 79898542Smckusick btodb(fragroundup(&sblock, node.dp2.di_size)); 79998542Smckusick wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize, 80098542Smckusick iobuf); 801122037Smckusick iput(&node, ROOTINO); 802140603Swes if (!nflag) { 803140603Swes /* 804140603Swes * create the .snap directory 805140603Swes */ 806140603Swes node.dp2.di_mode |= 020; 807140603Swes node.dp2.di_gid = grp->gr_gid; 808140603Swes node.dp2.di_nlink = SNAPLINKCNT; 809140603Swes node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT); 810140603Swes node.dp2.di_db[0] = 811140603Swes alloc(sblock.fs_fsize, node.dp2.di_mode); 812140603Swes node.dp2.di_blocks = 813140603Swes btodb(fragroundup(&sblock, node.dp2.di_size)); 814140603Swes wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), 815140603Swes sblock.fs_fsize, iobuf); 816140603Swes iput(&node, ROOTINO + 1); 817140603Swes } 81898542Smckusick } 8191558Srgrimes} 8201558Srgrimes 8211558Srgrimes/* 82298542Smckusick * construct a set of directory entries in "iobuf". 8231558Srgrimes * return size of directory. 8241558Srgrimes */ 82537664Scharnierint 82692711Siedowsemakedir(struct direct *protodir, int entries) 8271558Srgrimes{ 8281558Srgrimes char *cp; 8291558Srgrimes int i, spcleft; 8301558Srgrimes 8311558Srgrimes spcleft = DIRBLKSIZ; 83298542Smckusick memset(iobuf, 0, DIRBLKSIZ); 83398542Smckusick for (cp = iobuf, i = 0; i < entries - 1; i++) { 8341558Srgrimes protodir[i].d_reclen = DIRSIZ(0, &protodir[i]); 83523682Speter memmove(cp, &protodir[i], protodir[i].d_reclen); 8361558Srgrimes cp += protodir[i].d_reclen; 8371558Srgrimes spcleft -= protodir[i].d_reclen; 8381558Srgrimes } 8391558Srgrimes protodir[i].d_reclen = spcleft; 84023682Speter memmove(cp, &protodir[i], DIRSIZ(0, &protodir[i])); 8411558Srgrimes return (DIRBLKSIZ); 8421558Srgrimes} 8431558Srgrimes 8441558Srgrimes/* 8451558Srgrimes * allocate a block or frag 8461558Srgrimes */ 84798542Smckusickufs2_daddr_t 84892711Siedowsealloc(int size, int mode) 8491558Srgrimes{ 85098542Smckusick int i, d, blkno, frag; 8511558Srgrimes 852110671Sjmallett bread(&disk, fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 853110671Sjmallett sblock.fs_cgsize); 8541558Srgrimes if (acg.cg_magic != CG_MAGIC) { 8551558Srgrimes printf("cg 0: bad magic number\n"); 856118493Syar exit(38); 8571558Srgrimes } 8581558Srgrimes if (acg.cg_cs.cs_nbfree == 0) { 8591558Srgrimes printf("first cylinder group ran out of space\n"); 860118493Syar exit(39); 8611558Srgrimes } 8621558Srgrimes for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) 8631558Srgrimes if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) 8641558Srgrimes goto goth; 8651558Srgrimes printf("internal error: can't find block in cyl 0\n"); 866118493Syar exit(40); 8671558Srgrimesgoth: 8681558Srgrimes blkno = fragstoblks(&sblock, d); 8691558Srgrimes clrblock(&sblock, cg_blksfree(&acg), blkno); 87023682Speter if (sblock.fs_contigsumsize > 0) 87123682Speter clrbit(cg_clustersfree(&acg), blkno); 8721558Srgrimes acg.cg_cs.cs_nbfree--; 8731558Srgrimes sblock.fs_cstotal.cs_nbfree--; 8741558Srgrimes fscs[0].cs_nbfree--; 8751558Srgrimes if (mode & IFDIR) { 8761558Srgrimes acg.cg_cs.cs_ndir++; 8771558Srgrimes sblock.fs_cstotal.cs_ndir++; 8781558Srgrimes fscs[0].cs_ndir++; 8791558Srgrimes } 8801558Srgrimes if (size != sblock.fs_bsize) { 8811558Srgrimes frag = howmany(size, sblock.fs_fsize); 8821558Srgrimes fscs[0].cs_nffree += sblock.fs_frag - frag; 8831558Srgrimes sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; 8841558Srgrimes acg.cg_cs.cs_nffree += sblock.fs_frag - frag; 8851558Srgrimes acg.cg_frsum[sblock.fs_frag - frag]++; 8861558Srgrimes for (i = frag; i < sblock.fs_frag; i++) 8871558Srgrimes setbit(cg_blksfree(&acg), d + i); 8881558Srgrimes } 889110671Sjmallett /* XXX cgwrite(&disk, 0)??? */ 8901558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 8911558Srgrimes (char *)&acg); 89298542Smckusick return ((ufs2_daddr_t)d); 8931558Srgrimes} 8941558Srgrimes 8951558Srgrimes/* 8961558Srgrimes * Allocate an inode on the disk 8971558Srgrimes */ 89837664Scharniervoid 89998542Smckusickiput(union dinode *ip, ino_t ino) 9001558Srgrimes{ 90198542Smckusick ufs2_daddr_t d; 9021558Srgrimes int c; 9031558Srgrimes 9041558Srgrimes c = ino_to_cg(&sblock, ino); 905110671Sjmallett bread(&disk, fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 906110671Sjmallett sblock.fs_cgsize); 9071558Srgrimes if (acg.cg_magic != CG_MAGIC) { 9081558Srgrimes printf("cg 0: bad magic number\n"); 9091558Srgrimes exit(31); 9101558Srgrimes } 9111558Srgrimes acg.cg_cs.cs_nifree--; 9121558Srgrimes setbit(cg_inosused(&acg), ino); 9131558Srgrimes wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, 9141558Srgrimes (char *)&acg); 9151558Srgrimes sblock.fs_cstotal.cs_nifree--; 9161558Srgrimes fscs[0].cs_nifree--; 91798542Smckusick if (ino >= (unsigned long)sblock.fs_ipg * sblock.fs_ncg) { 9181558Srgrimes printf("fsinit: inode value out of range (%d).\n", ino); 9191558Srgrimes exit(32); 9201558Srgrimes } 9211558Srgrimes d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino)); 922110671Sjmallett bread(&disk, d, (char *)iobuf, sblock.fs_bsize); 92398542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC) 92498542Smckusick ((struct ufs1_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] = 92598542Smckusick ip->dp1; 92698542Smckusick else 92798542Smckusick ((struct ufs2_dinode *)iobuf)[ino_to_fsbo(&sblock, ino)] = 92898542Smckusick ip->dp2; 929110065Sjmallett wtfs(d, sblock.fs_bsize, (char *)iobuf); 9301558Srgrimes} 9311558Srgrimes 9321558Srgrimes/* 933110671Sjmallett * possibly write to disk 9341558Srgrimes */ 93593737Sphkstatic void 93698542Smckusickwtfs(ufs2_daddr_t bno, int size, char *bf) 9371558Srgrimes{ 9381558Srgrimes if (Nflag) 9391558Srgrimes return; 940114877Siedowse if (bwrite(&disk, bno, bf, size) < 0) 941114877Siedowse err(36, "wtfs: %d bytes at sector %jd", size, (intmax_t)bno); 9421558Srgrimes} 9431558Srgrimes 9441558Srgrimes/* 9451558Srgrimes * check if a block is available 9461558Srgrimes */ 94793737Sphkstatic int 94892711Siedowseisblock(struct fs *fs, unsigned char *cp, int h) 9491558Srgrimes{ 9501558Srgrimes unsigned char mask; 9511558Srgrimes 9521558Srgrimes switch (fs->fs_frag) { 9531558Srgrimes case 8: 9541558Srgrimes return (cp[h] == 0xff); 9551558Srgrimes case 4: 9561558Srgrimes mask = 0x0f << ((h & 0x1) << 2); 9571558Srgrimes return ((cp[h >> 1] & mask) == mask); 9581558Srgrimes case 2: 9591558Srgrimes mask = 0x03 << ((h & 0x3) << 1); 9601558Srgrimes return ((cp[h >> 2] & mask) == mask); 9611558Srgrimes case 1: 9621558Srgrimes mask = 0x01 << (h & 0x7); 9631558Srgrimes return ((cp[h >> 3] & mask) == mask); 9641558Srgrimes default: 9651558Srgrimes fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); 9661558Srgrimes return (0); 9671558Srgrimes } 9681558Srgrimes} 9691558Srgrimes 9701558Srgrimes/* 9711558Srgrimes * take a block out of the map 9721558Srgrimes */ 97393737Sphkstatic void 97492711Siedowseclrblock(struct fs *fs, unsigned char *cp, int h) 9751558Srgrimes{ 9761558Srgrimes switch ((fs)->fs_frag) { 9771558Srgrimes case 8: 9781558Srgrimes cp[h] = 0; 9791558Srgrimes return; 9801558Srgrimes case 4: 9811558Srgrimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 9821558Srgrimes return; 9831558Srgrimes case 2: 9841558Srgrimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 9851558Srgrimes return; 9861558Srgrimes case 1: 9871558Srgrimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 9881558Srgrimes return; 9891558Srgrimes default: 9901558Srgrimes fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); 9911558Srgrimes return; 9921558Srgrimes } 9931558Srgrimes} 9941558Srgrimes 9951558Srgrimes/* 9961558Srgrimes * put a block into the map 9971558Srgrimes */ 99893737Sphkstatic void 99992711Siedowsesetblock(struct fs *fs, unsigned char *cp, int h) 10001558Srgrimes{ 10011558Srgrimes switch (fs->fs_frag) { 10021558Srgrimes case 8: 10031558Srgrimes cp[h] = 0xff; 10041558Srgrimes return; 10051558Srgrimes case 4: 10061558Srgrimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 10071558Srgrimes return; 10081558Srgrimes case 2: 10091558Srgrimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 10101558Srgrimes return; 10111558Srgrimes case 1: 10121558Srgrimes cp[h >> 3] |= (0x01 << (h & 0x7)); 10131558Srgrimes return; 10141558Srgrimes default: 10151558Srgrimes fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); 10161558Srgrimes return; 10171558Srgrimes } 10181558Srgrimes} 101913637Sjoerg 102013637Sjoerg/* 102113769Sjoerg * Determine the number of characters in a 102213637Sjoerg * single line. 102313637Sjoerg */ 102413637Sjoerg 102513637Sjoergstatic int 102692717Sphkcharsperline(void) 102713637Sjoerg{ 102813769Sjoerg int columns; 102913637Sjoerg char *cp; 103013637Sjoerg struct winsize ws; 103113637Sjoerg 103213637Sjoerg columns = 0; 103313637Sjoerg if (ioctl(0, TIOCGWINSZ, &ws) != -1) 103413637Sjoerg columns = ws.ws_col; 103513637Sjoerg if (columns == 0 && (cp = getenv("COLUMNS"))) 103613637Sjoerg columns = atoi(cp); 103713637Sjoerg if (columns == 0) 103813637Sjoerg columns = 80; /* last resort */ 103985860Sphk return (columns); 104013637Sjoerg} 104192712Siedowse 104292712Siedowsestatic int 104392712Siedowseilog2(int val) 104492712Siedowse{ 104592763Sphk u_int n; 104692712Siedowse 1047103949Smike for (n = 0; n < sizeof(n) * CHAR_BIT; n++) 104892712Siedowse if (1 << n == val) 104992712Siedowse return (n); 105092712Siedowse errx(1, "ilog2: %d is not a power of 2\n", val); 105192712Siedowse} 1052111268Smckusick 1053111268Smckusick/* 1054111268Smckusick * For the regression test, return predictable random values. 1055111268Smckusick * Otherwise use a true random number generator. 1056111268Smckusick */ 1057111268Smckusickstatic u_int32_t 1058111268Smckusicknewfs_random(void) 1059111268Smckusick{ 1060111268Smckusick static int nextnum = 1; 1061111268Smckusick 1062111268Smckusick if (Rflag) 1063111268Smckusick return (nextnum++); 1064111268Smckusick return (arc4random()); 1065111268Smckusick} 1066