setup.c revision 37236
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 1.11 1998/06/15 07:07:21 charnier 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 = 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 lp = getdisklabel((char *)NULL, fsreadfd); 118 if (lp) 119 dev_bsize = secsize = lp->d_secsize; 120 else 121 dev_bsize = secsize = DEV_BSIZE; 122 /* 123 * Read in the superblock, looking for alternates if necessary 124 */ 125 if (readsb(1) == 0) { 126 skipclean = 0; 127 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 128 return(0); 129 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 130 return (0); 131 for (cg = 0; cg < proto.fs_ncg; cg++) { 132 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 133 if (readsb(0) != 0) 134 break; 135 } 136 if (cg >= proto.fs_ncg) { 137 printf("%s %s\n%s %s\n%s %s\n", 138 "SEARCH FOR ALTERNATE SUPER-BLOCK", 139 "FAILED. YOU MUST USE THE", 140 "-b OPTION TO FSCK TO SPECIFY THE", 141 "LOCATION OF AN ALTERNATE", 142 "SUPER-BLOCK TO SUPPLY NEEDED", 143 "INFORMATION; SEE fsck(8)."); 144 bflag = 0; 145 return(0); 146 } 147 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 148 bflag = 0; 149 } 150 maxfsblock = sblock.fs_size; 151 maxino = sblock.fs_ncg * sblock.fs_ipg; 152 /* 153 * Check and potentially fix certain fields in the super block. 154 */ 155 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 156 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 157 if (reply("SET TO DEFAULT") == 1) { 158 sblock.fs_optim = FS_OPTTIME; 159 sbdirty(); 160 } 161 } 162 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 163 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 164 sblock.fs_minfree); 165 if (reply("SET TO DEFAULT") == 1) { 166 sblock.fs_minfree = 10; 167 sbdirty(); 168 } 169 } 170 if (sblock.fs_interleave < 1 || 171 sblock.fs_interleave > sblock.fs_nsect) { 172 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 173 sblock.fs_interleave); 174 sblock.fs_interleave = 1; 175 if (preen) 176 printf(" (FIXED)\n"); 177 if (preen || reply("SET TO DEFAULT") == 1) { 178 sbdirty(); 179 dirty(&asblk); 180 } 181 } 182 if (sblock.fs_npsect < sblock.fs_nsect || 183 sblock.fs_npsect > sblock.fs_nsect*2) { 184 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 185 sblock.fs_npsect); 186 sblock.fs_npsect = sblock.fs_nsect; 187 if (preen) 188 printf(" (FIXED)\n"); 189 if (preen || reply("SET TO DEFAULT") == 1) { 190 sbdirty(); 191 dirty(&asblk); 192 } 193 } 194 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 195 newinofmt = 1; 196 } else { 197 sblock.fs_qbmask = ~sblock.fs_bmask; 198 sblock.fs_qfmask = ~sblock.fs_fmask; 199 newinofmt = 0; 200 } 201 /* 202 * Convert to new inode format. 203 */ 204 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 205 if (preen) 206 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 207 else if (!reply("CONVERT TO NEW INODE FORMAT")) 208 return(0); 209 doinglevel2++; 210 sblock.fs_inodefmt = FS_44INODEFMT; 211 sizepb = sblock.fs_bsize; 212 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 213 for (i = 0; i < NIADDR; i++) { 214 sizepb *= NINDIR(&sblock); 215 sblock.fs_maxfilesize += sizepb; 216 } 217 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 218 sblock.fs_qbmask = ~sblock.fs_bmask; 219 sblock.fs_qfmask = ~sblock.fs_fmask; 220 sbdirty(); 221 dirty(&asblk); 222 } 223 /* 224 * Convert to new cylinder group format. 225 */ 226 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 227 if (preen) 228 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 229 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 230 return(0); 231 doinglevel1++; 232 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 233 sblock.fs_nrpos = 8; 234 sblock.fs_postbloff = 235 (char *)(&sblock.fs_opostbl[0][0]) - 236 (char *)(&sblock.fs_firstfield); 237 sblock.fs_rotbloff = &sblock.fs_space[0] - 238 (u_char *)(&sblock.fs_firstfield); 239 sblock.fs_cgsize = 240 fragroundup(&sblock, CGSIZE(&sblock)); 241 sbdirty(); 242 dirty(&asblk); 243 } 244 if (asblk.b_dirty && !bflag) { 245 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 246 flush(fswritefd, &asblk); 247 } 248 /* 249 * read in the summary info. 250 */ 251 asked = 0; 252 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 253 size = sblock.fs_cssize - i < sblock.fs_bsize ? 254 sblock.fs_cssize - i : sblock.fs_bsize; 255 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 256 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 257 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 258 size) != 0 && !asked) { 259 pfatal("BAD SUMMARY INFORMATION"); 260 if (reply("CONTINUE") == 0) { 261 ckfini(0); 262 exit(EEXIT); 263 } 264 asked++; 265 } 266 } 267 /* 268 * If we survive the above basic checks and are preening, 269 * quit here unless forced. 270 */ 271 if (skipclean && sblock.fs_clean && !fflag) 272 return (-1); 273 /* 274 * allocate and initialize the necessary maps 275 */ 276 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 277 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 278 if (blockmap == NULL) { 279 printf("cannot alloc %u bytes for blockmap\n", 280 (unsigned)bmapsize); 281 goto badsb; 282 } 283 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 284 if (statemap == NULL) { 285 printf("cannot alloc %u bytes for statemap\n", 286 (unsigned)(maxino + 1)); 287 goto badsb; 288 } 289 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 290 if (typemap == NULL) { 291 printf("cannot alloc %u bytes for typemap\n", 292 (unsigned)(maxino + 1)); 293 goto badsb; 294 } 295 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 296 if (lncntp == NULL) { 297 printf("cannot alloc %u bytes for lncntp\n", 298 (unsigned)(maxino + 1) * sizeof(short)); 299 goto badsb; 300 } 301 numdirs = sblock.fs_cstotal.cs_ndir; 302 if (numdirs == 0) { 303 printf("numdirs is zero, try using an alternate superblock\n"); 304 goto badsb; 305 } 306 inplast = 0; 307 listmax = numdirs + 10; 308 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 309 sizeof(struct inoinfo *)); 310 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 311 sizeof(struct inoinfo *)); 312 if (inpsort == NULL || inphead == NULL) { 313 printf("cannot alloc %u bytes for inphead\n", 314 (unsigned)numdirs * sizeof(struct inoinfo *)); 315 goto badsb; 316 } 317 bufinit(); 318 if (sblock.fs_flags & FS_DOSOFTDEP) 319 usedsoftdep = 1; 320 else 321 usedsoftdep = 0; 322 return (1); 323 324badsb: 325 ckfini(0); 326 return (0); 327} 328 329/* 330 * Read in the super block and its summary info. 331 */ 332static int 333readsb(listerr) 334 int listerr; 335{ 336 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 337 338 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 339 return (0); 340 sblk.b_bno = super; 341 sblk.b_size = SBSIZE; 342 /* 343 * run a few consistency checks of the super block 344 */ 345 if (sblock.fs_magic != FS_MAGIC) 346 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 347 if (sblock.fs_ncg < 1) 348 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 349 if (sblock.fs_cpg < 1) 350 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 351 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 352 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 353 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 354 if (sblock.fs_sbsize > SBSIZE) 355 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 356 /* 357 * Compute block size that the filesystem is based on, 358 * according to fsbtodb, and adjust superblock block number 359 * so we can tell if this is an alternate later. 360 */ 361 super *= dev_bsize; 362 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 363 sblk.b_bno = super / dev_bsize; 364 if (bflag) { 365 havesb = 1; 366 return (1); 367 } 368 /* 369 * Set all possible fields that could differ, then do check 370 * of whole super block against an alternate super block. 371 * When an alternate super-block is specified this check is skipped. 372 */ 373 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 374 if (asblk.b_errs) 375 return (0); 376 altsblock.fs_firstfield = sblock.fs_firstfield; 377 altsblock.fs_unused_1 = sblock.fs_unused_1; 378 altsblock.fs_time = sblock.fs_time; 379 altsblock.fs_cstotal = sblock.fs_cstotal; 380 altsblock.fs_cgrotor = sblock.fs_cgrotor; 381 altsblock.fs_fmod = sblock.fs_fmod; 382 altsblock.fs_clean = sblock.fs_clean; 383 altsblock.fs_ronly = sblock.fs_ronly; 384 altsblock.fs_flags = sblock.fs_flags; 385 altsblock.fs_maxcontig = sblock.fs_maxcontig; 386 altsblock.fs_minfree = sblock.fs_minfree; 387 altsblock.fs_optim = sblock.fs_optim; 388 altsblock.fs_rotdelay = sblock.fs_rotdelay; 389 altsblock.fs_maxbpg = sblock.fs_maxbpg; 390 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 391 altsblock.fs_maxcluster = sblock.fs_maxcluster; 392 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 393 memmove(altsblock.fs_sparecon, 394 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 395 /* 396 * The following should not have to be copied. 397 */ 398 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 399 altsblock.fs_interleave = sblock.fs_interleave; 400 altsblock.fs_npsect = sblock.fs_npsect; 401 altsblock.fs_nrpos = sblock.fs_nrpos; 402 altsblock.fs_state = sblock.fs_state; 403 altsblock.fs_qbmask = sblock.fs_qbmask; 404 altsblock.fs_qfmask = sblock.fs_qfmask; 405 altsblock.fs_state = sblock.fs_state; 406 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 407 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 408 if (debug) { 409 long *nlp, *olp, *endlp; 410 411 printf("superblock mismatches\n"); 412 nlp = (long *)&altsblock; 413 olp = (long *)&sblock; 414 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 415 for ( ; olp < endlp; olp++, nlp++) { 416 if (*olp == *nlp) 417 continue; 418 printf( 419 "offset %d, original %ld, alternate %ld\n", 420 olp - (long *)&sblock, *olp, *nlp); 421 } 422 } 423 badsb(listerr, 424 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 425 return (0); 426 } 427 havesb = 1; 428 return (1); 429} 430 431static void 432badsb(listerr, s) 433 int listerr; 434 char *s; 435{ 436 437 if (!listerr) 438 return; 439 if (preen) 440 printf("%s: ", cdevname); 441 pfatal("BAD SUPER BLOCK: %s\n", s); 442} 443 444/* 445 * Calculate a prototype superblock based on information in the disk label. 446 * When done the cgsblock macro can be calculated and the fs_ncg field 447 * can be used. Do NOT attempt to use other macros without verifying that 448 * their needed information is available! 449 */ 450static int 451calcsb(dev, devfd, fs) 452 char *dev; 453 int devfd; 454 register struct fs *fs; 455{ 456 register struct disklabel *lp; 457 register struct partition *pp; 458 register char *cp; 459 int i; 460 461 cp = strchr(dev, '\0') - 1; 462 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 463 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 464 return (0); 465 } 466 lp = getdisklabel(dev, devfd); 467 if (isdigit(*cp)) 468 pp = &lp->d_partitions[0]; 469 else 470 pp = &lp->d_partitions[*cp - 'a']; 471 if (pp->p_fstype != FS_BSDFFS) { 472 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 473 dev, pp->p_fstype < FSMAXTYPES ? 474 fstypenames[pp->p_fstype] : "unknown"); 475 return (0); 476 } 477 if (pp->p_fsize == 0 || pp->p_frag == 0) { 478 pfatal("%s: LABELED AS A %s FILE SYSTEM, BUT BLOCK SIZE IS 0\n", 479 dev, fstypenames[pp->p_fstype]); 480 return (0); 481 } 482 memset(fs, 0, sizeof(struct fs)); 483 fs->fs_fsize = pp->p_fsize; 484 fs->fs_frag = pp->p_frag; 485 fs->fs_cpg = pp->p_cpg; 486 fs->fs_size = pp->p_size; 487 fs->fs_ntrak = lp->d_ntracks; 488 fs->fs_nsect = lp->d_nsectors; 489 fs->fs_spc = lp->d_secpercyl; 490 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 491 fs->fs_sblkno = roundup( 492 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 493 fs->fs_frag); 494 fs->fs_cgmask = 0xffffffff; 495 for (i = fs->fs_ntrak; i > 1; i >>= 1) 496 fs->fs_cgmask <<= 1; 497 if (!POWEROF2(fs->fs_ntrak)) 498 fs->fs_cgmask <<= 1; 499 fs->fs_cgoffset = roundup( 500 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 501 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 502 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 503 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 504 fs->fs_fsbtodb++; 505 dev_bsize = lp->d_secsize; 506 return (1); 507} 508 509static struct disklabel * 510getdisklabel(s, fd) 511 char *s; 512 int fd; 513{ 514 static struct disklabel lab; 515 516 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 517 if (s == NULL) 518 return ((struct disklabel *)NULL); 519 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 520 errx(EEXIT, "%s: can't read disk label", s); 521 } 522 return (&lab); 523} 524