setup.c revision 41477
1/* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 37#endif 38static const char rcsid[] = 39 "$Id: setup.c,v 1.12 1998/06/28 19:23:03 bde Exp $"; 40#endif /* not lint */ 41 42#define DKTYPENAMES 43#include <sys/param.h> 44#include <sys/stat.h> 45#include <sys/disklabel.h> 46#include <sys/file.h> 47 48#include <ufs/ufs/dinode.h> 49#include <ufs/ffs/fs.h> 50 51#include <ctype.h> 52#include <err.h> 53#include <errno.h> 54#include <string.h> 55 56#include "fsck.h" 57 58struct bufarea asblk; 59#define altsblock (*asblk.b_un.b_fs) 60#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 61 62static void badsb __P((int listerr, char *s)); 63static int calcsb __P((char *dev, int devfd, struct fs *fs)); 64static struct disklabel *getdisklabel __P((char *s, int fd)); 65static int readsb __P((int listerr)); 66 67/* 68 * Read in a superblock finding an alternate if necessary. 69 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 70 * is already clean (preen mode only). 71 */ 72int 73setup(dev) 74 char *dev; 75{ 76 long cg, size, asked, i, j; 77 long skipclean, bmapsize; 78 struct disklabel *lp; 79 off_t sizepb; 80 struct stat statb; 81 struct fs proto; 82 83 havesb = 0; 84 fswritefd = -1; 85 skipclean = fflag ? 0 : preen; 86 if (stat(dev, &statb) < 0) { 87 printf("Can't stat %s: %s\n", dev, strerror(errno)); 88 return (0); 89 } 90 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 91 pfatal("%s is not a character device", dev); 92 if (reply("CONTINUE") == 0) 93 return (0); 94 } 95 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 96 printf("Can't open %s: %s\n", dev, strerror(errno)); 97 return (0); 98 } 99 if (preen == 0) 100 printf("** %s", dev); 101 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 102 fswritefd = -1; 103 if (preen) 104 pfatal("NO WRITE ACCESS"); 105 printf(" (NO WRITE)"); 106 } 107 if (preen == 0) 108 printf("\n"); 109 fsmodified = 0; 110 lfdir = 0; 111 initbarea(&sblk); 112 initbarea(&asblk); 113 sblk.b_un.b_buf = malloc(SBSIZE); 114 asblk.b_un.b_buf = malloc(SBSIZE); 115 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 116 errx(EEXIT, "cannot allocate space for superblock"); 117 if ((lp = getdisklabel(NULL, fsreadfd))) 118 dev_bsize = secsize = lp->d_secsize; 119 else 120 dev_bsize = secsize = DEV_BSIZE; 121 /* 122 * Read in the superblock, looking for alternates if necessary 123 */ 124 if (readsb(1) == 0) { 125 skipclean = 0; 126 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 127 return(0); 128 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 129 return (0); 130 for (cg = 0; cg < proto.fs_ncg; cg++) { 131 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 132 if (readsb(0) != 0) 133 break; 134 } 135 if (cg >= proto.fs_ncg) { 136 printf("%s %s\n%s %s\n%s %s\n", 137 "SEARCH FOR ALTERNATE SUPER-BLOCK", 138 "FAILED. YOU MUST USE THE", 139 "-b OPTION TO FSCK TO SPECIFY THE", 140 "LOCATION OF AN ALTERNATE", 141 "SUPER-BLOCK TO SUPPLY NEEDED", 142 "INFORMATION; SEE fsck(8)."); 143 bflag = 0; 144 return(0); 145 } 146 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 147 bflag = 0; 148 } 149 if (skipclean && sblock.fs_clean) { 150 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 151 return (-1); 152 } 153 maxfsblock = sblock.fs_size; 154 maxino = sblock.fs_ncg * sblock.fs_ipg; 155 /* 156 * Check and potentially fix certain fields in the super block. 157 */ 158 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 159 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 160 if (reply("SET TO DEFAULT") == 1) { 161 sblock.fs_optim = FS_OPTTIME; 162 sbdirty(); 163 } 164 } 165 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 166 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 167 sblock.fs_minfree); 168 if (reply("SET TO DEFAULT") == 1) { 169 sblock.fs_minfree = 10; 170 sbdirty(); 171 } 172 } 173 if (sblock.fs_interleave < 1 || 174 sblock.fs_interleave > sblock.fs_nsect) { 175 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 176 sblock.fs_interleave); 177 sblock.fs_interleave = 1; 178 if (preen) 179 printf(" (FIXED)\n"); 180 if (preen || reply("SET TO DEFAULT") == 1) { 181 sbdirty(); 182 dirty(&asblk); 183 } 184 } 185 if (sblock.fs_npsect < sblock.fs_nsect || 186 sblock.fs_npsect > sblock.fs_nsect*2) { 187 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 188 sblock.fs_npsect); 189 sblock.fs_npsect = sblock.fs_nsect; 190 if (preen) 191 printf(" (FIXED)\n"); 192 if (preen || reply("SET TO DEFAULT") == 1) { 193 sbdirty(); 194 dirty(&asblk); 195 } 196 } 197 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 198 newinofmt = 1; 199 } else { 200 sblock.fs_qbmask = ~sblock.fs_bmask; 201 sblock.fs_qfmask = ~sblock.fs_fmask; 202 newinofmt = 0; 203 } 204 /* 205 * Convert to new inode format. 206 */ 207 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 208 if (preen) 209 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 210 else if (!reply("CONVERT TO NEW INODE FORMAT")) 211 return(0); 212 doinglevel2++; 213 sblock.fs_inodefmt = FS_44INODEFMT; 214 sizepb = sblock.fs_bsize; 215 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 216 for (i = 0; i < NIADDR; i++) { 217 sizepb *= NINDIR(&sblock); 218 sblock.fs_maxfilesize += sizepb; 219 } 220 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 221 sblock.fs_qbmask = ~sblock.fs_bmask; 222 sblock.fs_qfmask = ~sblock.fs_fmask; 223 sbdirty(); 224 dirty(&asblk); 225 } 226 /* 227 * Convert to new cylinder group format. 228 */ 229 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 230 if (preen) 231 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 232 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 233 return(0); 234 doinglevel1++; 235 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 236 sblock.fs_nrpos = 8; 237 sblock.fs_postbloff = 238 (char *)(&sblock.fs_opostbl[0][0]) - 239 (char *)(&sblock.fs_firstfield); 240 sblock.fs_rotbloff = &sblock.fs_space[0] - 241 (u_char *)(&sblock.fs_firstfield); 242 sblock.fs_cgsize = 243 fragroundup(&sblock, CGSIZE(&sblock)); 244 sbdirty(); 245 dirty(&asblk); 246 } 247 if (asblk.b_dirty && !bflag) { 248 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 249 flush(fswritefd, &asblk); 250 } 251 /* 252 * read in the summary info. 253 */ 254 asked = 0; 255 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 256 size = sblock.fs_cssize - i < sblock.fs_bsize ? 257 sblock.fs_cssize - i : sblock.fs_bsize; 258 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 259 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 260 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 261 size) != 0 && !asked) { 262 pfatal("BAD SUMMARY INFORMATION"); 263 if (reply("CONTINUE") == 0) { 264 ckfini(0); 265 exit(EEXIT); 266 } 267 asked++; 268 } 269 } 270 /* 271 * allocate and initialize the necessary maps 272 */ 273 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 274 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 275 if (blockmap == NULL) { 276 printf("cannot alloc %u bytes for blockmap\n", 277 (unsigned)bmapsize); 278 goto badsb; 279 } 280 inostathead = calloc((unsigned)(sblock.fs_ncg), 281 sizeof(struct inostatlist)); 282 if (inostathead == NULL) { 283 printf("cannot alloc %u bytes for inostathead\n", 284 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 285 goto badsb; 286 } 287 numdirs = sblock.fs_cstotal.cs_ndir; 288 if (numdirs == 0) { 289 printf("numdirs is zero, try using an alternate superblock\n"); 290 goto badsb; 291 } 292 inplast = 0; 293 listmax = numdirs + 10; 294 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 295 sizeof(struct inoinfo *)); 296 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 297 sizeof(struct inoinfo *)); 298 if (inpsort == NULL || inphead == NULL) { 299 printf("cannot alloc %u bytes for inphead\n", 300 (unsigned)numdirs * sizeof(struct inoinfo *)); 301 goto badsb; 302 } 303 bufinit(); 304 if (sblock.fs_flags & FS_DOSOFTDEP) 305 usedsoftdep = 1; 306 else 307 usedsoftdep = 0; 308 return (1); 309 310badsb: 311 ckfini(0); 312 return (0); 313} 314 315/* 316 * Read in the super block and its summary info. 317 */ 318static int 319readsb(listerr) 320 int listerr; 321{ 322 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 323 324 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 325 return (0); 326 sblk.b_bno = super; 327 sblk.b_size = SBSIZE; 328 /* 329 * run a few consistency checks of the super block 330 */ 331 if (sblock.fs_magic != FS_MAGIC) 332 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 333 if (sblock.fs_ncg < 1) 334 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 335 if (sblock.fs_cpg < 1) 336 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 337 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 338 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 339 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 340 if (sblock.fs_sbsize > SBSIZE) 341 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 342 /* 343 * Compute block size that the filesystem is based on, 344 * according to fsbtodb, and adjust superblock block number 345 * so we can tell if this is an alternate later. 346 */ 347 super *= dev_bsize; 348 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 349 sblk.b_bno = super / dev_bsize; 350 if (bflag) { 351 havesb = 1; 352 return (1); 353 } 354 /* 355 * Set all possible fields that could differ, then do check 356 * of whole super block against an alternate super block. 357 * When an alternate super-block is specified this check is skipped. 358 */ 359 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 360 if (asblk.b_errs) 361 return (0); 362 altsblock.fs_firstfield = sblock.fs_firstfield; 363 altsblock.fs_unused_1 = sblock.fs_unused_1; 364 altsblock.fs_time = sblock.fs_time; 365 altsblock.fs_cstotal = sblock.fs_cstotal; 366 altsblock.fs_cgrotor = sblock.fs_cgrotor; 367 altsblock.fs_fmod = sblock.fs_fmod; 368 altsblock.fs_clean = sblock.fs_clean; 369 altsblock.fs_ronly = sblock.fs_ronly; 370 altsblock.fs_flags = sblock.fs_flags; 371 altsblock.fs_maxcontig = sblock.fs_maxcontig; 372 altsblock.fs_minfree = sblock.fs_minfree; 373 altsblock.fs_optim = sblock.fs_optim; 374 altsblock.fs_rotdelay = sblock.fs_rotdelay; 375 altsblock.fs_maxbpg = sblock.fs_maxbpg; 376 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 377 altsblock.fs_maxcluster = sblock.fs_maxcluster; 378 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 379 memmove(altsblock.fs_sparecon, 380 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 381 /* 382 * The following should not have to be copied. 383 */ 384 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 385 altsblock.fs_interleave = sblock.fs_interleave; 386 altsblock.fs_npsect = sblock.fs_npsect; 387 altsblock.fs_nrpos = sblock.fs_nrpos; 388 altsblock.fs_state = sblock.fs_state; 389 altsblock.fs_qbmask = sblock.fs_qbmask; 390 altsblock.fs_qfmask = sblock.fs_qfmask; 391 altsblock.fs_state = sblock.fs_state; 392 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 393 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 394 if (debug) { 395 long *nlp, *olp, *endlp; 396 397 printf("superblock mismatches\n"); 398 nlp = (long *)&altsblock; 399 olp = (long *)&sblock; 400 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 401 for ( ; olp < endlp; olp++, nlp++) { 402 if (*olp == *nlp) 403 continue; 404 printf( 405 "offset %d, original %ld, alternate %ld\n", 406 olp - (long *)&sblock, *olp, *nlp); 407 } 408 } 409 badsb(listerr, 410 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 411 return (0); 412 } 413 havesb = 1; 414 return (1); 415} 416 417static void 418badsb(listerr, s) 419 int listerr; 420 char *s; 421{ 422 423 if (!listerr) 424 return; 425 if (preen) 426 printf("%s: ", cdevname); 427 pfatal("BAD SUPER BLOCK: %s\n", s); 428} 429 430/* 431 * Calculate a prototype superblock based on information in the disk label. 432 * When done the cgsblock macro can be calculated and the fs_ncg field 433 * can be used. Do NOT attempt to use other macros without verifying that 434 * their needed information is available! 435 */ 436static int 437calcsb(dev, devfd, fs) 438 char *dev; 439 int devfd; 440 register struct fs *fs; 441{ 442 register struct disklabel *lp; 443 register struct partition *pp; 444 register char *cp; 445 int i; 446 447 cp = strchr(dev, '\0') - 1; 448 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 449 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 450 return (0); 451 } 452 lp = getdisklabel(dev, devfd); 453 if (isdigit(*cp)) 454 pp = &lp->d_partitions[0]; 455 else 456 pp = &lp->d_partitions[*cp - 'a']; 457 if (pp->p_fstype != FS_BSDFFS) { 458 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 459 dev, pp->p_fstype < FSMAXTYPES ? 460 fstypenames[pp->p_fstype] : "unknown"); 461 return (0); 462 } 463 if (pp->p_fsize == 0 || pp->p_frag == 0 || 464 pp->p_cpg == 0 || pp->p_size == 0) { 465 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 466 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 467 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 468 return (0); 469 } 470 memset(fs, 0, sizeof(struct fs)); 471 fs->fs_fsize = pp->p_fsize; 472 fs->fs_frag = pp->p_frag; 473 fs->fs_cpg = pp->p_cpg; 474 fs->fs_size = pp->p_size; 475 fs->fs_ntrak = lp->d_ntracks; 476 fs->fs_nsect = lp->d_nsectors; 477 fs->fs_spc = lp->d_secpercyl; 478 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 479 fs->fs_sblkno = roundup( 480 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 481 fs->fs_frag); 482 fs->fs_cgmask = 0xffffffff; 483 for (i = fs->fs_ntrak; i > 1; i >>= 1) 484 fs->fs_cgmask <<= 1; 485 if (!POWEROF2(fs->fs_ntrak)) 486 fs->fs_cgmask <<= 1; 487 fs->fs_cgoffset = roundup( 488 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 489 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 490 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 491 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 492 fs->fs_fsbtodb++; 493 dev_bsize = lp->d_secsize; 494 return (1); 495} 496 497static struct disklabel * 498getdisklabel(s, fd) 499 char *s; 500 int fd; 501{ 502 static struct disklabel lab; 503 504 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 505 if (s == NULL) 506 return ((struct disklabel *)NULL); 507 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 508 errx(EEXIT, "%s: can't read disk label", s); 509 } 510 return (&lab); 511} 512