setup.c revision 8871
1256056Sgrehan/* 2256056Sgrehan * Copyright (c) 1980, 1986, 1993 3256056Sgrehan * The Regents of the University of California. All rights reserved. 4256056Sgrehan * 5256056Sgrehan * Redistribution and use in source and binary forms, with or without 6256056Sgrehan * modification, are permitted provided that the following conditions 7256056Sgrehan * are met: 8256056Sgrehan * 1. Redistributions of source code must retain the above copyright 9256056Sgrehan * notice, this list of conditions and the following disclaimer. 10256056Sgrehan * 2. Redistributions in binary form must reproduce the above copyright 11256056Sgrehan * notice, this list of conditions and the following disclaimer in the 12256056Sgrehan * documentation and/or other materials provided with the distribution. 13256056Sgrehan * 3. All advertising materials mentioning features or use of this software 14256056Sgrehan * must display the following acknowledgement: 15256056Sgrehan * This product includes software developed by the University of 16256056Sgrehan * California, Berkeley and its contributors. 17256056Sgrehan * 4. Neither the name of the University nor the names of its contributors 18256056Sgrehan * may be used to endorse or promote products derived from this software 19256056Sgrehan * without specific prior written permission. 20256056Sgrehan * 21256056Sgrehan * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22256056Sgrehan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23256056Sgrehan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24256056Sgrehan * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25256056Sgrehan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26256056Sgrehan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27256056Sgrehan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28256056Sgrehan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29256056Sgrehan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30256056Sgrehan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31256056Sgrehan * SUCH DAMAGE. 32256056Sgrehan */ 33256056Sgrehan 34256056Sgrehan#ifndef lint 35256056Sgrehanstatic const char sccsid[] = "@(#)setup.c 8.2 (Berkeley) 2/21/94"; 36256056Sgrehan#endif /* not lint */ 37256056Sgrehan 38256056Sgrehan#define DKTYPENAMES 39256056Sgrehan#include <sys/param.h> 40256056Sgrehan#include <sys/time.h> 41256056Sgrehan#include <ufs/ufs/dinode.h> 42256056Sgrehan#include <ufs/ffs/fs.h> 43256056Sgrehan#include <sys/stat.h> 44256056Sgrehan#include <sys/ioctl.h> 45256056Sgrehan#include <sys/disklabel.h> 46256056Sgrehan#include <sys/file.h> 47256056Sgrehan#include <errno.h> 48256056Sgrehan#include <stdio.h> 49256056Sgrehan#include <stdlib.h> 50256056Sgrehan#include <string.h> 51276349Sneel#include <ctype.h> 52256056Sgrehan#include "fsck.h" 53280745Smav 54256056Sgrehanstruct bufarea asblk; 55256056Sgrehan#define altsblock (*asblk.b_un.b_fs) 56256056Sgrehan#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 57256056Sgrehan 58256056Sgrehanstatic int readsb __P((int listerr)); 59256056Sgrehanstatic void badsb __P((int listerr, char *s)); 60256056Sgrehanstatic int calcsb __P((char *dev, int devfd, struct fs *fs)); 61256056Sgrehanstatic struct disklabel * getdisklabel __P((char *s, int fd)); 62256056Sgrehan 63256056Sgrehan 64256056Sgrehanint 65256056Sgrehansetup(dev) 66256056Sgrehan char *dev; 67256056Sgrehan{ 68256056Sgrehan long cg, size, asked, i, j; 69256056Sgrehan long bmapsize; 70256056Sgrehan struct disklabel *lp; 71256056Sgrehan off_t sizepb; 72256056Sgrehan struct stat statb; 73256056Sgrehan struct fs proto; 74256056Sgrehan 75256056Sgrehan havesb = 0; 76256056Sgrehan fswritefd = -1; 77256056Sgrehan if (stat(dev, &statb) < 0) { 78256056Sgrehan printf("Can't stat %s: %s\n", dev, strerror(errno)); 79256056Sgrehan return (0); 80256056Sgrehan } 81256056Sgrehan if ((statb.st_mode & S_IFMT) != S_IFCHR) { 82256056Sgrehan pfatal("%s is not a character device", dev); 83256056Sgrehan if (reply("CONTINUE") == 0) 84256056Sgrehan return (0); 85256056Sgrehan } 86256056Sgrehan if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 87256056Sgrehan printf("Can't open %s: %s\n", dev, strerror(errno)); 88256056Sgrehan return (0); 89256056Sgrehan } 90280740Smav if (preen == 0) 91256056Sgrehan printf("** %s", dev); 92256056Sgrehan if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 93256056Sgrehan fswritefd = -1; 94256056Sgrehan if (preen) 95256056Sgrehan pfatal("NO WRITE ACCESS"); 96256056Sgrehan printf(" (NO WRITE)"); 97256056Sgrehan } 98256056Sgrehan if (preen == 0) 99256056Sgrehan printf("\n"); 100256056Sgrehan fsmodified = 0; 101267339Sjhb lfdir = 0; 102267339Sjhb initbarea(&sblk); 103267339Sjhb initbarea(&asblk); 104267339Sjhb sblk.b_un.b_buf = malloc(SBSIZE); 105267339Sjhb asblk.b_un.b_buf = malloc(SBSIZE); 106267339Sjhb if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 107267339Sjhb errexit("cannot allocate space for superblock\n"); 108256056Sgrehan lp = getdisklabel((char *)NULL, fsreadfd); 109256056Sgrehan if (lp) 110256056Sgrehan dev_bsize = secsize = lp->d_secsize; 111256056Sgrehan else 112256056Sgrehan dev_bsize = secsize = DEV_BSIZE; 113256056Sgrehan /* 114256056Sgrehan * Read in the superblock, looking for alternates if necessary 115256056Sgrehan */ 116256056Sgrehan if (readsb(1) == 0) { 117256056Sgrehan if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 118256056Sgrehan return(0); 119256056Sgrehan if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 120256056Sgrehan return (0); 121276349Sneel for (cg = 0; cg < proto.fs_ncg; cg++) { 122276349Sneel bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 123256056Sgrehan if (readsb(0) != 0) 124256056Sgrehan break; 125256056Sgrehan } 126256056Sgrehan if (cg >= proto.fs_ncg) { 127282306Smav printf("%s %s\n%s %s\n%s %s\n", 128256056Sgrehan "SEARCH FOR ALTERNATE SUPER-BLOCK", 129256056Sgrehan "FAILED. YOU MUST USE THE", 130256056Sgrehan "-b OPTION TO FSCK TO SPECIFY THE", 131256056Sgrehan "LOCATION OF AN ALTERNATE", 132256056Sgrehan "SUPER-BLOCK TO SUPPLY NEEDED", 133256164Sdim "INFORMATION; SEE fsck(8)."); 134256164Sdim bflag = 0; 135280745Smav return(0); 136256056Sgrehan } 137256056Sgrehan pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 138282846Smav bflag = 0; 139256056Sgrehan } 140256056Sgrehan maxfsblock = sblock.fs_size; 141280736Smav maxino = sblock.fs_ncg * sblock.fs_ipg; 142256056Sgrehan /* 143256056Sgrehan * Check and potentially fix certain fields in the super block. 144282846Smav */ 145267339Sjhb if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 146256056Sgrehan pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 147256056Sgrehan if (reply("SET TO DEFAULT") == 1) { 148256056Sgrehan sblock.fs_optim = FS_OPTTIME; 149256056Sgrehan sbdirty(); 150256056Sgrehan } 151256056Sgrehan } 152256056Sgrehan if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 153256056Sgrehan pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 154256056Sgrehan sblock.fs_minfree); 155256056Sgrehan if (reply("SET TO DEFAULT") == 1) { 156256056Sgrehan sblock.fs_minfree = 10; 157256056Sgrehan sbdirty(); 158256056Sgrehan } 159256056Sgrehan } 160256056Sgrehan if (sblock.fs_interleave < 1 || 161256056Sgrehan sblock.fs_interleave > sblock.fs_nsect) { 162256056Sgrehan pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 163256056Sgrehan sblock.fs_interleave); 164256056Sgrehan sblock.fs_interleave = 1; 165256056Sgrehan if (preen) 166256056Sgrehan printf(" (FIXED)\n"); 167256056Sgrehan if (preen || reply("SET TO DEFAULT") == 1) { 168256056Sgrehan sbdirty(); 169256056Sgrehan dirty(&asblk); 170256056Sgrehan } 171276349Sneel } 172256056Sgrehan if (sblock.fs_npsect < sblock.fs_nsect || 173256056Sgrehan sblock.fs_npsect > sblock.fs_nsect*2) { 174256056Sgrehan pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 175256056Sgrehan sblock.fs_npsect); 176256056Sgrehan sblock.fs_npsect = sblock.fs_nsect; 177256056Sgrehan if (preen) 178256056Sgrehan printf(" (FIXED)\n"); 179256056Sgrehan if (preen || reply("SET TO DEFAULT") == 1) { 180256056Sgrehan sbdirty(); 181256056Sgrehan dirty(&asblk); 182256056Sgrehan } 183256056Sgrehan } 184256056Sgrehan if (sblock.fs_inodefmt >= FS_44INODEFMT) { 185259301Sgrehan newinofmt = 1; 186256056Sgrehan } else { 187256056Sgrehan sblock.fs_qbmask = ~sblock.fs_bmask; 188256056Sgrehan sblock.fs_qfmask = ~sblock.fs_fmask; 189256056Sgrehan newinofmt = 0; 190256056Sgrehan } 191256056Sgrehan /* 192256056Sgrehan * Convert to new inode format. 193256056Sgrehan */ 194256056Sgrehan if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 195256056Sgrehan if (preen) 196256056Sgrehan pwarn("CONVERTING TO NEW INODE FORMAT\n"); 197256056Sgrehan else if (!reply("CONVERT TO NEW INODE FORMAT")) 198256056Sgrehan return(0); 199256056Sgrehan doinglevel2++; 200256056Sgrehan sblock.fs_inodefmt = FS_44INODEFMT; 201256056Sgrehan sizepb = sblock.fs_bsize; 202256056Sgrehan sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 203256056Sgrehan for (i = 0; i < NIADDR; i++) { 204267393Sjhb sizepb *= NINDIR(&sblock); 205256056Sgrehan sblock.fs_maxfilesize += sizepb; 206256056Sgrehan } 207256056Sgrehan sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 208256056Sgrehan sblock.fs_qbmask = ~sblock.fs_bmask; 209282846Smav sblock.fs_qfmask = ~sblock.fs_fmask; 210282846Smav sbdirty(); 211256056Sgrehan dirty(&asblk); 212256056Sgrehan } 213256056Sgrehan /* 214256056Sgrehan * Convert to new cylinder group format. 215256056Sgrehan */ 216256056Sgrehan if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 217256056Sgrehan if (preen) 218256056Sgrehan pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 219256056Sgrehan else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 220256056Sgrehan return(0); 221256056Sgrehan doinglevel1++; 222256056Sgrehan sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 223256056Sgrehan sblock.fs_nrpos = 8; 224256056Sgrehan sblock.fs_postbloff = 225256056Sgrehan (char *)(&sblock.fs_opostbl[0][0]) - 226267393Sjhb (char *)(&sblock.fs_link); 227256056Sgrehan sblock.fs_rotbloff = &sblock.fs_space[0] - 228256056Sgrehan (u_char *)(&sblock.fs_link); 229267393Sjhb sblock.fs_cgsize = 230267393Sjhb fragroundup(&sblock, CGSIZE(&sblock)); 231256056Sgrehan sbdirty(); 232256056Sgrehan dirty(&asblk); 233256056Sgrehan } 234256056Sgrehan if (asblk.b_dirty) { 235256056Sgrehan bcopy((char *)&sblock, (char *)&altsblock, 236256056Sgrehan (size_t)sblock.fs_sbsize); 237256056Sgrehan flush(fswritefd, &asblk); 238256056Sgrehan } 239256056Sgrehan /* 240267393Sjhb * read in the summary info. 241267393Sjhb */ 242267393Sjhb asked = 0; 243267393Sjhb for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 244267393Sjhb size = sblock.fs_cssize - i < sblock.fs_bsize ? 245267393Sjhb sblock.fs_cssize - i : sblock.fs_bsize; 246267393Sjhb sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 247267393Sjhb if (bread(fsreadfd, (char *)sblock.fs_csp[j], 248267393Sjhb fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 249267393Sjhb size) != 0 && !asked) { 250267393Sjhb pfatal("BAD SUMMARY INFORMATION"); 251267393Sjhb if (reply("CONTINUE") == 0) 252267393Sjhb errexit(""); 253267393Sjhb asked++; 254267393Sjhb } 255267393Sjhb } 256267393Sjhb /* 257267393Sjhb * allocate and initialize the necessary maps 258267393Sjhb */ 259267393Sjhb bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 260267393Sjhb blockmap = calloc((unsigned)bmapsize, sizeof (char)); 261267393Sjhb if (blockmap == NULL) { 262256056Sgrehan printf("cannot alloc %u bytes for blockmap\n", 263256056Sgrehan (unsigned)bmapsize); 264256056Sgrehan goto badsb; 265256056Sgrehan } 266256056Sgrehan statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 267256056Sgrehan if (statemap == NULL) { 268256056Sgrehan printf("cannot alloc %u bytes for statemap\n", 269256164Sdim (unsigned)(maxino + 1)); 270256056Sgrehan goto badsb; 271256056Sgrehan } 272256056Sgrehan typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 273256056Sgrehan if (typemap == NULL) { 274256056Sgrehan printf("cannot alloc %u bytes for typemap\n", 275256056Sgrehan (unsigned)(maxino + 1)); 276282846Smav goto badsb; 277256056Sgrehan } 278256056Sgrehan lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 279256056Sgrehan if (lncntp == NULL) { 280256056Sgrehan printf("cannot alloc %u bytes for lncntp\n", 281282846Smav (unsigned)(maxino + 1) * sizeof(short)); 282256056Sgrehan goto badsb; 283256056Sgrehan } 284256056Sgrehan numdirs = sblock.fs_cstotal.cs_ndir; 285256056Sgrehan inplast = 0; 286282846Smav listmax = numdirs + 10; 287256056Sgrehan inpsort = (struct inoinfo **)calloc((unsigned)listmax, 288256056Sgrehan sizeof(struct inoinfo *)); 289256056Sgrehan inphead = (struct inoinfo **)calloc((unsigned)numdirs, 290256056Sgrehan sizeof(struct inoinfo *)); 291256056Sgrehan if (inpsort == NULL || inphead == NULL) { 292282846Smav printf("cannot alloc %u bytes for inphead\n", 293282846Smav (unsigned)numdirs * sizeof(struct inoinfo *)); 294282846Smav goto badsb; 295282846Smav } 296256056Sgrehan bufinit(); 297256056Sgrehan return (1); 298256056Sgrehan 299256056Sgrehanbadsb: 300256056Sgrehan ckfini(); 301256056Sgrehan return (0); 302256056Sgrehan} 303256056Sgrehan 304267339Sjhb/* 305267339Sjhb * Read in the super block and its summary info. 306267339Sjhb */ 307267339Sjhbstatic int 308267339Sjhbreadsb(listerr) 309267339Sjhb int listerr; 310267339Sjhb{ 311267339Sjhb daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 312267339Sjhb 313267339Sjhb if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 314280736Smav return (0); 315256056Sgrehan sblk.b_bno = super; 316256056Sgrehan sblk.b_size = SBSIZE; 317256056Sgrehan /* 318256056Sgrehan * run a few consistency checks of the super block 319256056Sgrehan */ 320282846Smav if (sblock.fs_magic != FS_MAGIC) 321256056Sgrehan { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 322280736Smav if (sblock.fs_ncg < 1) 323280736Smav { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 324282846Smav if (sblock.fs_cpg < 1) 325280736Smav { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 326280736Smav if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 327280736Smav (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 328282846Smav { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 329280736Smav if (sblock.fs_sbsize > SBSIZE) 330280736Smav { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 331280736Smav /* 332280736Smav * Compute block size that the filesystem is based on, 333280736Smav * according to fsbtodb, and adjust superblock block number 334280736Smav * so we can tell if this is an alternate later. 335282846Smav */ 336282846Smav super *= dev_bsize; 337256056Sgrehan dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 338256056Sgrehan sblk.b_bno = super / dev_bsize; 339256056Sgrehan if (bflag) { 340256056Sgrehan havesb = 1; 341256056Sgrehan return (1); 342256056Sgrehan } 343256056Sgrehan /* 344256056Sgrehan * Set all possible fields that could differ, then do check 345256056Sgrehan * of whole super block against an alternate super block. 346256056Sgrehan * When an alternate super-block is specified this check is skipped. 347256056Sgrehan */ 348256056Sgrehan getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 349256056Sgrehan if (asblk.b_errs) 350256056Sgrehan return (0); 351256056Sgrehan altsblock.fs_link = sblock.fs_link; 352256056Sgrehan altsblock.fs_rlink = sblock.fs_rlink; 353256056Sgrehan altsblock.fs_time = sblock.fs_time; 354256056Sgrehan altsblock.fs_cstotal = sblock.fs_cstotal; 355256056Sgrehan altsblock.fs_cgrotor = sblock.fs_cgrotor; 356256056Sgrehan altsblock.fs_fmod = sblock.fs_fmod; 357256056Sgrehan altsblock.fs_clean = sblock.fs_clean; 358256056Sgrehan altsblock.fs_ronly = sblock.fs_ronly; 359256056Sgrehan altsblock.fs_flags = sblock.fs_flags; 360256056Sgrehan altsblock.fs_maxcontig = sblock.fs_maxcontig; 361256056Sgrehan altsblock.fs_minfree = sblock.fs_minfree; 362280736Smav altsblock.fs_optim = sblock.fs_optim; 363280736Smav altsblock.fs_rotdelay = sblock.fs_rotdelay; 364280736Smav altsblock.fs_maxbpg = sblock.fs_maxbpg; 365280736Smav bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 366280736Smav sizeof sblock.fs_csp); 367280736Smav bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 368270159Sgrehan sizeof sblock.fs_fsmnt); 369256056Sgrehan bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 370256056Sgrehan sizeof sblock.fs_sparecon); 371256056Sgrehan /* 372256056Sgrehan * The following should not have to be copied. 373256056Sgrehan */ 374282846Smav altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 375282846Smav altsblock.fs_interleave = sblock.fs_interleave; 376282846Smav altsblock.fs_npsect = sblock.fs_npsect; 377282846Smav altsblock.fs_nrpos = sblock.fs_nrpos; 378282846Smav altsblock.fs_qbmask = sblock.fs_qbmask; 379282846Smav altsblock.fs_qfmask = sblock.fs_qfmask; 380282846Smav altsblock.fs_state = sblock.fs_state; 381282846Smav altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 382282846Smav if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 383282846Smav badsb(listerr, 384282846Smav "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 385282846Smav return (0); 386282846Smav } 387282846Smav havesb = 1; 388282846Smav return (1); 389256056Sgrehan} 390256056Sgrehan 391256056Sgrehanstatic void 392256056Sgrehanbadsb(listerr, s) 393256056Sgrehan int listerr; 394256056Sgrehan char *s; 395256056Sgrehan{ 396256056Sgrehan 397256056Sgrehan if (!listerr) 398256056Sgrehan return; 399256056Sgrehan if (preen) 400256056Sgrehan printf("%s: ", cdevname); 401256056Sgrehan pfatal("BAD SUPER BLOCK: %s\n", s); 402256056Sgrehan} 403256056Sgrehan 404256056Sgrehan/* 405256056Sgrehan * Calculate a prototype superblock based on information in the disk label. 406276349Sneel * When done the cgsblock macro can be calculated and the fs_ncg field 407276349Sneel * can be used. Do NOT attempt to use other macros without verifying that 408276349Sneel * their needed information is available! 409276349Sneel */ 410276429Sneelint 411276429Sneelcalcsb(dev, devfd, fs) 412276349Sneel char *dev; 413276349Sneel int devfd; 414276429Sneel register struct fs *fs; 415282846Smav{ 416276349Sneel register struct disklabel *lp; 417276429Sneel register struct partition *pp; 418276429Sneel register char *cp; 419282846Smav int i; 420276429Sneel 421276349Sneel cp = index(dev, '\0') - 1; 422276349Sneel if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 423276349Sneel pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 424276349Sneel return (0); 425276349Sneel } 426276349Sneel lp = getdisklabel(dev, devfd); 427276349Sneel if (isdigit(*cp)) 428276349Sneel pp = &lp->d_partitions[0]; 429276349Sneel else 430276349Sneel pp = &lp->d_partitions[*cp - 'a']; 431276349Sneel if (pp->p_fstype != FS_BSDFFS) { 432276349Sneel pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 433276349Sneel dev, pp->p_fstype < FSMAXTYPES ? 434276349Sneel fstypenames[pp->p_fstype] : "unknown"); 435276349Sneel return (0); 436276349Sneel } 437276349Sneel bzero((char *)fs, sizeof(struct fs)); 438276349Sneel fs->fs_fsize = pp->p_fsize; 439276349Sneel fs->fs_frag = pp->p_frag; 440276349Sneel fs->fs_cpg = pp->p_cpg; 441276349Sneel fs->fs_size = pp->p_size; 442276349Sneel fs->fs_ntrak = lp->d_ntracks; 443276349Sneel fs->fs_nsect = lp->d_nsectors; 444276349Sneel fs->fs_spc = lp->d_secpercyl; 445276349Sneel fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 446282844Smav fs->fs_sblkno = roundup( 447282844Smav howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 448276349Sneel fs->fs_frag); 449276349Sneel fs->fs_cgmask = 0xffffffff; 450276349Sneel for (i = fs->fs_ntrak; i > 1; i >>= 1) 451276349Sneel fs->fs_cgmask <<= 1; 452276349Sneel if (!POWEROF2(fs->fs_ntrak)) 453276349Sneel fs->fs_cgmask <<= 1; 454276349Sneel fs->fs_cgoffset = roundup( 455276349Sneel howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 456276349Sneel fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 457276349Sneel fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 458276349Sneel for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 459276349Sneel fs->fs_fsbtodb++; 460276349Sneel dev_bsize = lp->d_secsize; 461276349Sneel return (1); 462276349Sneel} 463276349Sneel 464276349Sneelstruct disklabel * 465276349Sneelgetdisklabel(s, fd) 466276349Sneel char *s; 467276349Sneel int fd; 468276349Sneel{ 469276349Sneel static struct disklabel lab; 470276349Sneel 471276349Sneel if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 472276349Sneel if (s == NULL) 473276349Sneel return ((struct disklabel *)NULL); 474276349Sneel pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 475256056Sgrehan errexit("%s: can't read disk label\n", s); 476256056Sgrehan } 477256056Sgrehan return (&lab); 478256056Sgrehan} 479256056Sgrehan