setup.c revision 71884
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 71884 2001-01-31 15:16:56Z 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 /* This should match the kernel limit in ffs_oldfscompat(). */ 209 sblock.fs_maxfilesize = (u_int64_t)1 << 39; 210 newinofmt = 0; 211 } 212 /* 213 * Convert to new inode format. 214 */ 215 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 216 if (preen) 217 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 218 else if (!reply("CONVERT TO NEW INODE FORMAT")) 219 return(0); 220 doinglevel2++; 221 sblock.fs_inodefmt = FS_44INODEFMT; 222 sizepb = sblock.fs_bsize; 223 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 224 for (i = 0; i < NIADDR; i++) { 225 sizepb *= NINDIR(&sblock); 226 sblock.fs_maxfilesize += sizepb; 227 } 228 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 229 sblock.fs_qbmask = ~sblock.fs_bmask; 230 sblock.fs_qfmask = ~sblock.fs_fmask; 231 sbdirty(); 232 dirty(&asblk); 233 } 234 /* 235 * Convert to new cylinder group format. 236 */ 237 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 238 if (preen) 239 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 240 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 241 return(0); 242 doinglevel1++; 243 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 244 sblock.fs_nrpos = 8; 245 sblock.fs_postbloff = 246 (char *)(&sblock.fs_opostbl[0][0]) - 247 (char *)(&sblock.fs_firstfield); 248 sblock.fs_rotbloff = &sblock.fs_space[0] - 249 (u_char *)(&sblock.fs_firstfield); 250 sblock.fs_cgsize = 251 fragroundup(&sblock, CGSIZE(&sblock)); 252 sbdirty(); 253 dirty(&asblk); 254 } 255 if (asblk.b_dirty && !bflag) { 256 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 257 flush(fswritefd, &asblk); 258 } 259 /* 260 * read in the summary info. 261 */ 262 asked = 0; 263 sblock.fs_csp = calloc(1, sblock.fs_cssize); 264 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 265 size = sblock.fs_cssize - i < sblock.fs_bsize ? 266 sblock.fs_cssize - i : sblock.fs_bsize; 267 if (bread(fsreadfd, (char *)sblock.fs_csp + i, 268 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 269 size) != 0 && !asked) { 270 pfatal("BAD SUMMARY INFORMATION"); 271 if (reply("CONTINUE") == 0) { 272 ckfini(0); 273 exit(EEXIT); 274 } 275 asked++; 276 } 277 } 278 /* 279 * allocate and initialize the necessary maps 280 */ 281 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 282 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 283 if (blockmap == NULL) { 284 printf("cannot alloc %u bytes for blockmap\n", 285 (unsigned)bmapsize); 286 goto badsb; 287 } 288 inostathead = calloc((unsigned)(sblock.fs_ncg), 289 sizeof(struct inostatlist)); 290 if (inostathead == NULL) { 291 printf("cannot alloc %u bytes for inostathead\n", 292 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 293 goto badsb; 294 } 295 numdirs = sblock.fs_cstotal.cs_ndir; 296 dirhash = numdirs; 297 if (numdirs == 0) { 298 printf("numdirs is zero, try using an alternate superblock\n"); 299 goto badsb; 300 } 301 inplast = 0; 302 listmax = numdirs + 10; 303 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 304 sizeof(struct inoinfo *)); 305 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 306 sizeof(struct inoinfo *)); 307 if (inpsort == NULL || inphead == NULL) { 308 printf("cannot alloc %u bytes for inphead\n", 309 (unsigned)numdirs * sizeof(struct inoinfo *)); 310 goto badsb; 311 } 312 bufinit(); 313 if (sblock.fs_flags & FS_DOSOFTDEP) 314 usedsoftdep = 1; 315 else 316 usedsoftdep = 0; 317 return (1); 318 319badsb: 320 ckfini(0); 321 return (0); 322} 323 324/* 325 * Read in the super block and its summary info. 326 */ 327static int 328readsb(listerr) 329 int listerr; 330{ 331 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 332 333 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 334 return (0); 335 sblk.b_bno = super; 336 sblk.b_size = SBSIZE; 337 /* 338 * run a few consistency checks of the super block 339 */ 340 if (sblock.fs_magic != FS_MAGIC) 341 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 342 if (sblock.fs_ncg < 1) 343 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 344 if (sblock.fs_cpg < 1) 345 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 346 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 347 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 348 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 349 if (sblock.fs_sbsize > SBSIZE) 350 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 351 /* 352 * Compute block size that the filesystem is based on, 353 * according to fsbtodb, and adjust superblock block number 354 * so we can tell if this is an alternate later. 355 */ 356 super *= dev_bsize; 357 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 358 sblk.b_bno = super / dev_bsize; 359 if (bflag) { 360 havesb = 1; 361 return (1); 362 } 363 /* 364 * Set all possible fields that could differ, then do check 365 * of whole super block against an alternate super block. 366 * When an alternate super-block is specified this check is skipped. 367 */ 368 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 369 if (asblk.b_errs) 370 return (0); 371 altsblock.fs_firstfield = sblock.fs_firstfield; 372 altsblock.fs_unused_1 = sblock.fs_unused_1; 373 altsblock.fs_time = sblock.fs_time; 374 altsblock.fs_cstotal = sblock.fs_cstotal; 375 altsblock.fs_cgrotor = sblock.fs_cgrotor; 376 altsblock.fs_fmod = sblock.fs_fmod; 377 altsblock.fs_clean = sblock.fs_clean; 378 altsblock.fs_ronly = sblock.fs_ronly; 379 altsblock.fs_flags = sblock.fs_flags; 380 altsblock.fs_maxcontig = sblock.fs_maxcontig; 381 altsblock.fs_minfree = sblock.fs_minfree; 382 altsblock.fs_optim = sblock.fs_optim; 383 altsblock.fs_rotdelay = sblock.fs_rotdelay; 384 altsblock.fs_maxbpg = sblock.fs_maxbpg; 385 memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 386 altsblock.fs_csp = sblock.fs_csp; 387 altsblock.fs_maxcluster = sblock.fs_maxcluster; 388 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 389 memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 390 sizeof sblock.fs_snapinum); 391 memmove(altsblock.fs_sparecon, 392 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 393 /* 394 * The following should not have to be copied. 395 */ 396 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 397 altsblock.fs_interleave = sblock.fs_interleave; 398 altsblock.fs_npsect = sblock.fs_npsect; 399 altsblock.fs_nrpos = sblock.fs_nrpos; 400 altsblock.fs_state = sblock.fs_state; 401 altsblock.fs_qbmask = sblock.fs_qbmask; 402 altsblock.fs_qfmask = sblock.fs_qfmask; 403 altsblock.fs_state = sblock.fs_state; 404 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 405 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 406 if (debug) { 407 long *nlp, *olp, *endlp; 408 409 printf("superblock mismatches\n"); 410 nlp = (long *)&altsblock; 411 olp = (long *)&sblock; 412 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 413 for ( ; olp < endlp; olp++, nlp++) { 414 if (*olp == *nlp) 415 continue; 416 printf( 417 "offset %d, original %ld, alternate %ld\n", 418 olp - (long *)&sblock, *olp, *nlp); 419 } 420 } 421 badsb(listerr, 422 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 423 return (0); 424 } 425 havesb = 1; 426 return (1); 427} 428 429static void 430badsb(listerr, s) 431 int listerr; 432 char *s; 433{ 434 435 if (!listerr) 436 return; 437 if (preen) 438 printf("%s: ", cdevname); 439 pfatal("BAD SUPER BLOCK: %s\n", s); 440} 441 442/* 443 * Calculate a prototype superblock based on information in the disk label. 444 * When done the cgsblock macro can be calculated and the fs_ncg field 445 * can be used. Do NOT attempt to use other macros without verifying that 446 * their needed information is available! 447 */ 448static int 449calcsb(dev, devfd, fs) 450 char *dev; 451 int devfd; 452 register struct fs *fs; 453{ 454 register struct disklabel *lp; 455 register struct partition *pp; 456 register char *cp; 457 int i; 458 459 cp = strchr(dev, '\0') - 1; 460 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 461 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 462 return (0); 463 } 464 lp = getdisklabel(dev, devfd); 465 if (isdigit(*cp)) 466 pp = &lp->d_partitions[0]; 467 else 468 pp = &lp->d_partitions[*cp - 'a']; 469 if (pp->p_fstype != FS_BSDFFS) { 470 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 471 dev, pp->p_fstype < FSMAXTYPES ? 472 fstypenames[pp->p_fstype] : "unknown"); 473 return (0); 474 } 475 if (pp->p_fsize == 0 || pp->p_frag == 0 || 476 pp->p_cpg == 0 || pp->p_size == 0) { 477 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 478 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 479 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 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