setup.c revision 71073
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 "$FreeBSD: head/sbin/fsck_ffs/setup.c 71073 2001-01-15 18:30:40Z iedowse $"; 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 cursnapshot = 0; 86 skipclean = fflag ? 0 : preen; 87 if (stat(dev, &statb) < 0) { 88 printf("Can't stat %s: %s\n", dev, strerror(errno)); 89 return (0); 90 } 91 if ((statb.st_mode & S_IFMT) != S_IFCHR && 92 (statb.st_mode & S_IFMT) != S_IFBLK) { 93 if ((statb.st_flags & SF_SNAPSHOT) != 0) { 94 cursnapshot = statb.st_ino; 95 } else { 96 pfatal("%s is not a disk device", dev); 97 if (reply("CONTINUE") == 0) 98 return (0); 99 } 100 } 101 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 102 printf("Can't open %s: %s\n", dev, strerror(errno)); 103 return (0); 104 } 105 if (preen == 0) 106 printf("** %s", dev); 107 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 108 fswritefd = -1; 109 if (preen) 110 pfatal("NO WRITE ACCESS"); 111 printf(" (NO WRITE)"); 112 } 113 if (preen == 0) 114 printf("\n"); 115 fsmodified = 0; 116 lfdir = 0; 117 initbarea(&sblk); 118 initbarea(&asblk); 119 sblk.b_un.b_buf = malloc(SBSIZE); 120 asblk.b_un.b_buf = malloc(SBSIZE); 121 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 122 errx(EEXIT, "cannot allocate space for superblock"); 123 if ((lp = getdisklabel(NULL, fsreadfd))) 124 dev_bsize = secsize = lp->d_secsize; 125 else 126 dev_bsize = secsize = DEV_BSIZE; 127 /* 128 * Read in the superblock, looking for alternates if necessary 129 */ 130 if (readsb(1) == 0) { 131 skipclean = 0; 132 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 133 return(0); 134 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 135 return (0); 136 for (cg = 0; cg < proto.fs_ncg; cg++) { 137 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 138 if (readsb(0) != 0) 139 break; 140 } 141 if (cg >= proto.fs_ncg) { 142 printf("%s %s\n%s %s\n%s %s\n", 143 "SEARCH FOR ALTERNATE SUPER-BLOCK", 144 "FAILED. YOU MUST USE THE", 145 "-b OPTION TO FSCK TO SPECIFY THE", 146 "LOCATION OF AN ALTERNATE", 147 "SUPER-BLOCK TO SUPPLY NEEDED", 148 "INFORMATION; SEE fsck(8)."); 149 bflag = 0; 150 return(0); 151 } 152 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 153 bflag = 0; 154 } 155 if (skipclean && sblock.fs_clean) { 156 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 157 return (-1); 158 } 159 maxfsblock = sblock.fs_size; 160 maxino = sblock.fs_ncg * sblock.fs_ipg; 161 /* 162 * Check and potentially fix certain fields in the super block. 163 */ 164 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 165 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 166 if (reply("SET TO DEFAULT") == 1) { 167 sblock.fs_optim = FS_OPTTIME; 168 sbdirty(); 169 } 170 } 171 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 172 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 173 sblock.fs_minfree); 174 if (reply("SET TO DEFAULT") == 1) { 175 sblock.fs_minfree = 10; 176 sbdirty(); 177 } 178 } 179 if (sblock.fs_interleave < 1 || 180 sblock.fs_interleave > sblock.fs_nsect) { 181 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 182 sblock.fs_interleave); 183 sblock.fs_interleave = 1; 184 if (preen) 185 printf(" (FIXED)\n"); 186 if (preen || reply("SET TO DEFAULT") == 1) { 187 sbdirty(); 188 dirty(&asblk); 189 } 190 } 191 if (sblock.fs_npsect < sblock.fs_nsect || 192 sblock.fs_npsect > sblock.fs_nsect*2) { 193 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 194 sblock.fs_npsect); 195 sblock.fs_npsect = sblock.fs_nsect; 196 if (preen) 197 printf(" (FIXED)\n"); 198 if (preen || reply("SET TO DEFAULT") == 1) { 199 sbdirty(); 200 dirty(&asblk); 201 } 202 } 203 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 204 newinofmt = 1; 205 } else { 206 sblock.fs_qbmask = ~sblock.fs_bmask; 207 sblock.fs_qfmask = ~sblock.fs_fmask; 208 newinofmt = 0; 209 } 210 /* 211 * Convert to new inode format. 212 */ 213 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 214 if (preen) 215 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 216 else if (!reply("CONVERT TO NEW INODE FORMAT")) 217 return(0); 218 doinglevel2++; 219 sblock.fs_inodefmt = FS_44INODEFMT; 220 sizepb = sblock.fs_bsize; 221 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 222 for (i = 0; i < NIADDR; i++) { 223 sizepb *= NINDIR(&sblock); 224 sblock.fs_maxfilesize += sizepb; 225 } 226 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 227 sblock.fs_qbmask = ~sblock.fs_bmask; 228 sblock.fs_qfmask = ~sblock.fs_fmask; 229 sbdirty(); 230 dirty(&asblk); 231 } 232 /* 233 * Convert to new cylinder group format. 234 */ 235 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 236 if (preen) 237 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 238 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 239 return(0); 240 doinglevel1++; 241 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 242 sblock.fs_nrpos = 8; 243 sblock.fs_postbloff = 244 (char *)(&sblock.fs_opostbl[0][0]) - 245 (char *)(&sblock.fs_firstfield); 246 sblock.fs_rotbloff = &sblock.fs_space[0] - 247 (u_char *)(&sblock.fs_firstfield); 248 sblock.fs_cgsize = 249 fragroundup(&sblock, CGSIZE(&sblock)); 250 sbdirty(); 251 dirty(&asblk); 252 } 253 if (asblk.b_dirty && !bflag) { 254 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 255 flush(fswritefd, &asblk); 256 } 257 /* 258 * read in the summary info. 259 */ 260 asked = 0; 261 sblock.fs_csp = calloc(1, sblock.fs_cssize); 262 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 263 size = sblock.fs_cssize - i < sblock.fs_bsize ? 264 sblock.fs_cssize - i : sblock.fs_bsize; 265 if (bread(fsreadfd, (char *)sblock.fs_csp + i, 266 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 267 size) != 0 && !asked) { 268 pfatal("BAD SUMMARY INFORMATION"); 269 if (reply("CONTINUE") == 0) { 270 ckfini(0); 271 exit(EEXIT); 272 } 273 asked++; 274 } 275 } 276 /* 277 * allocate and initialize the necessary maps 278 */ 279 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 280 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 281 if (blockmap == NULL) { 282 printf("cannot alloc %u bytes for blockmap\n", 283 (unsigned)bmapsize); 284 goto badsb; 285 } 286 inostathead = calloc((unsigned)(sblock.fs_ncg), 287 sizeof(struct inostatlist)); 288 if (inostathead == NULL) { 289 printf("cannot alloc %u bytes for inostathead\n", 290 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 291 goto badsb; 292 } 293 numdirs = sblock.fs_cstotal.cs_ndir; 294 dirhash = numdirs; 295 if (numdirs == 0) { 296 printf("numdirs is zero, try using an alternate superblock\n"); 297 goto badsb; 298 } 299 inplast = 0; 300 listmax = numdirs + 10; 301 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 302 sizeof(struct inoinfo *)); 303 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 304 sizeof(struct inoinfo *)); 305 if (inpsort == NULL || inphead == NULL) { 306 printf("cannot alloc %u bytes for inphead\n", 307 (unsigned)numdirs * sizeof(struct inoinfo *)); 308 goto badsb; 309 } 310 bufinit(); 311 if (sblock.fs_flags & FS_DOSOFTDEP) 312 usedsoftdep = 1; 313 else 314 usedsoftdep = 0; 315 return (1); 316 317badsb: 318 ckfini(0); 319 return (0); 320} 321 322/* 323 * Read in the super block and its summary info. 324 */ 325static int 326readsb(listerr) 327 int listerr; 328{ 329 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 330 331 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 332 return (0); 333 sblk.b_bno = super; 334 sblk.b_size = SBSIZE; 335 /* 336 * run a few consistency checks of the super block 337 */ 338 if (sblock.fs_magic != FS_MAGIC) 339 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 340 if (sblock.fs_ncg < 1) 341 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 342 if (sblock.fs_cpg < 1) 343 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 344 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 345 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 346 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 347 if (sblock.fs_sbsize > SBSIZE) 348 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 349 /* 350 * Compute block size that the filesystem is based on, 351 * according to fsbtodb, and adjust superblock block number 352 * so we can tell if this is an alternate later. 353 */ 354 super *= dev_bsize; 355 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 356 sblk.b_bno = super / dev_bsize; 357 if (bflag) { 358 havesb = 1; 359 return (1); 360 } 361 /* 362 * Set all possible fields that could differ, then do check 363 * of whole super block against an alternate super block. 364 * When an alternate super-block is specified this check is skipped. 365 */ 366 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 367 if (asblk.b_errs) 368 return (0); 369 altsblock.fs_firstfield = sblock.fs_firstfield; 370 altsblock.fs_unused_1 = sblock.fs_unused_1; 371 altsblock.fs_time = sblock.fs_time; 372 altsblock.fs_cstotal = sblock.fs_cstotal; 373 altsblock.fs_cgrotor = sblock.fs_cgrotor; 374 altsblock.fs_fmod = sblock.fs_fmod; 375 altsblock.fs_clean = sblock.fs_clean; 376 altsblock.fs_ronly = sblock.fs_ronly; 377 altsblock.fs_flags = sblock.fs_flags; 378 altsblock.fs_maxcontig = sblock.fs_maxcontig; 379 altsblock.fs_minfree = sblock.fs_minfree; 380 altsblock.fs_optim = sblock.fs_optim; 381 altsblock.fs_rotdelay = sblock.fs_rotdelay; 382 altsblock.fs_maxbpg = sblock.fs_maxbpg; 383 memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 384 altsblock.fs_csp = sblock.fs_csp; 385 altsblock.fs_maxcluster = sblock.fs_maxcluster; 386 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 387 memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 388 sizeof sblock.fs_snapinum); 389 memmove(altsblock.fs_sparecon, 390 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 391 /* 392 * The following should not have to be copied. 393 */ 394 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 395 altsblock.fs_interleave = sblock.fs_interleave; 396 altsblock.fs_npsect = sblock.fs_npsect; 397 altsblock.fs_nrpos = sblock.fs_nrpos; 398 altsblock.fs_state = sblock.fs_state; 399 altsblock.fs_qbmask = sblock.fs_qbmask; 400 altsblock.fs_qfmask = sblock.fs_qfmask; 401 altsblock.fs_state = sblock.fs_state; 402 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 403 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 404 if (debug) { 405 long *nlp, *olp, *endlp; 406 407 printf("superblock mismatches\n"); 408 nlp = (long *)&altsblock; 409 olp = (long *)&sblock; 410 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 411 for ( ; olp < endlp; olp++, nlp++) { 412 if (*olp == *nlp) 413 continue; 414 printf( 415 "offset %d, original %ld, alternate %ld\n", 416 olp - (long *)&sblock, *olp, *nlp); 417 } 418 } 419 badsb(listerr, 420 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 421 return (0); 422 } 423 havesb = 1; 424 return (1); 425} 426 427static void 428badsb(listerr, s) 429 int listerr; 430 char *s; 431{ 432 433 if (!listerr) 434 return; 435 if (preen) 436 printf("%s: ", cdevname); 437 pfatal("BAD SUPER BLOCK: %s\n", s); 438} 439 440/* 441 * Calculate a prototype superblock based on information in the disk label. 442 * When done the cgsblock macro can be calculated and the fs_ncg field 443 * can be used. Do NOT attempt to use other macros without verifying that 444 * their needed information is available! 445 */ 446static int 447calcsb(dev, devfd, fs) 448 char *dev; 449 int devfd; 450 register struct fs *fs; 451{ 452 register struct disklabel *lp; 453 register struct partition *pp; 454 register char *cp; 455 int i; 456 457 cp = strchr(dev, '\0') - 1; 458 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 459 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 460 return (0); 461 } 462 lp = getdisklabel(dev, devfd); 463 if (isdigit(*cp)) 464 pp = &lp->d_partitions[0]; 465 else 466 pp = &lp->d_partitions[*cp - 'a']; 467 if (pp->p_fstype != FS_BSDFFS) { 468 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 469 dev, pp->p_fstype < FSMAXTYPES ? 470 fstypenames[pp->p_fstype] : "unknown"); 471 return (0); 472 } 473 if (pp->p_fsize == 0 || pp->p_frag == 0 || 474 pp->p_cpg == 0 || pp->p_size == 0) { 475 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 476 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 477 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 478 return (0); 479 } 480 memset(fs, 0, sizeof(struct fs)); 481 fs->fs_fsize = pp->p_fsize; 482 fs->fs_frag = pp->p_frag; 483 fs->fs_cpg = pp->p_cpg; 484 fs->fs_size = pp->p_size; 485 fs->fs_ntrak = lp->d_ntracks; 486 fs->fs_nsect = lp->d_nsectors; 487 fs->fs_spc = lp->d_secpercyl; 488 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 489 fs->fs_sblkno = roundup( 490 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 491 fs->fs_frag); 492 fs->fs_cgmask = 0xffffffff; 493 for (i = fs->fs_ntrak; i > 1; i >>= 1) 494 fs->fs_cgmask <<= 1; 495 if (!POWEROF2(fs->fs_ntrak)) 496 fs->fs_cgmask <<= 1; 497 fs->fs_cgoffset = roundup( 498 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 499 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 500 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 501 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 502 fs->fs_fsbtodb++; 503 dev_bsize = lp->d_secsize; 504 return (1); 505} 506 507static struct disklabel * 508getdisklabel(s, fd) 509 char *s; 510 int fd; 511{ 512 static struct disklabel lab; 513 514 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 515 if (s == NULL) 516 return ((struct disklabel *)NULL); 517 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 518 errx(EEXIT, "%s: can't read disk label", s); 519 } 520 return (&lab); 521} 522