setup.c revision 1.89
1 /* $NetBSD: setup.c,v 1.89 2009/09/27 17:13:37 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 36 #else 37 __RCSID("$NetBSD: setup.c,v 1.89 2009/09/27 17:13:37 bouyer Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/stat.h> 44 #include <sys/ioctl.h> 45 #include <sys/file.h> 46 #include <sys/disk.h> 47 48 #include <ufs/ufs/dinode.h> 49 #include <ufs/ufs/dir.h> 50 #include <ufs/ufs/ufs_bswap.h> 51 #include <ufs/ffs/fs.h> 52 #include <ufs/ffs/ffs_extern.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 61 #include "fsck.h" 62 #include "extern.h" 63 #include "fsutil.h" 64 #include "partutil.h" 65 #include "exitvalues.h" 66 67 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 68 69 static void badsb(int, const char *); 70 static int calcsb(const char *, int, struct fs *); 71 static int readsb(int); 72 static int readappleufs(void); 73 74 int16_t sblkpostbl[256]; 75 76 /* 77 * Read in a superblock finding an alternate if necessary. 78 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 79 * is already clean (preen mode only). 80 */ 81 int 82 setup(const char *dev, const char *origdev) 83 { 84 long cg, size, asked, i, j; 85 long bmapsize; 86 struct disk_geom geo; 87 struct dkwedge_info dkw; 88 off_t sizepb; 89 struct stat statb; 90 struct fs proto; 91 int doskipclean; 92 u_int64_t maxfilesize; 93 struct csum *ccsp; 94 int fd; 95 96 havesb = 0; 97 fswritefd = -1; 98 doskipclean = skipclean; 99 if (stat(dev, &statb) < 0) { 100 printf("Can't stat %s: %s\n", dev, strerror(errno)); 101 return (0); 102 } 103 if (!forceimage && !S_ISCHR(statb.st_mode)) { 104 pfatal("%s is not a character device", dev); 105 if (reply("CONTINUE") == 0) 106 return (0); 107 } 108 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 109 printf("Can't open %s: %s\n", dev, strerror(errno)); 110 return (0); 111 } 112 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 113 fswritefd = -1; 114 if (preen) 115 pfatal("NO WRITE ACCESS"); 116 printf("** %s (NO WRITE)\n", dev); 117 quiet = 0; 118 } else 119 if (!preen && !quiet) 120 printf("** %s\n", dev); 121 fsmodified = 0; 122 lfdir = 0; 123 initbarea(&sblk); 124 initbarea(&asblk); 125 sblk.b_un.b_buf = malloc(SBLOCKSIZE); 126 sblock = malloc(SBLOCKSIZE); 127 asblk.b_un.b_buf = malloc(SBLOCKSIZE); 128 altsblock = malloc(SBLOCKSIZE); 129 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 130 sblock == NULL || altsblock == NULL) 131 errexit("Cannot allocate space for superblock"); 132 if (strcmp(dev, origdev) && !forceimage) { 133 /* 134 * dev isn't the original fs (for example it's a snapshot) 135 * do getdiskinfo on the original device 136 */ 137 fd = open(origdev, O_RDONLY); 138 if (fd < 0) { 139 warn("Can't open %s", origdev); 140 return (0); 141 } 142 } else { 143 fd = fsreadfd; 144 } 145 if (!forceimage && getdiskinfo(origdev, fd, NULL, &geo, &dkw) != -1) 146 dev_bsize = secsize = geo.dg_secsize; 147 else 148 dev_bsize = secsize = DEV_BSIZE; 149 /* 150 * Read in the superblock, looking for alternates if necessary 151 */ 152 if (readsb(1) == 0) { 153 if (bflag || preen || forceimage || 154 calcsb(dev, fsreadfd, &proto) == 0) 155 return(0); 156 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 157 return (0); 158 for (cg = 0; cg < proto.fs_ncg; cg++) { 159 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 160 if (readsb(0) != 0) 161 break; 162 } 163 if (cg >= proto.fs_ncg) { 164 printf("%s %s\n%s %s\n%s %s\n", 165 "SEARCH FOR ALTERNATE SUPER-BLOCK", 166 "FAILED. YOU MUST USE THE", 167 "-b OPTION TO fsck_ffs TO SPECIFY THE", 168 "LOCATION OF AN ALTERNATE", 169 "SUPER-BLOCK TO SUPPLY NEEDED", 170 "INFORMATION; SEE fsck_ffs(8)."); 171 return(0); 172 } 173 doskipclean = 0; 174 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 175 } 176 /* ffs_superblock_layout() == 2 */ 177 if (sblock->fs_magic != FS_UFS1_MAGIC || 178 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) { 179 /* can have WAPBL */ 180 if (check_wapbl() != 0) { 181 doskipclean = 0; 182 } 183 if (sblock->fs_flags & FS_DOWAPBL) { 184 if (preen && skipclean) { 185 if (!quiet) 186 pwarn("file system is journaled; " 187 "not checking\n"); 188 return (-1); 189 } 190 if (!quiet) 191 pwarn("** File system is journaled; " 192 "replaying journal\n"); 193 replay_wapbl(); 194 doskipclean = 0; 195 sblock->fs_flags &= ~FS_DOWAPBL; 196 sbdirty(); 197 /* Although we may have updated the superblock from 198 * the journal, we are still going to do a full check, 199 * so we don't bother to re-read the superblock from 200 * the journal. 201 * XXX, instead we could re-read the superblock and 202 * then not force doskipclean = 0 203 */ 204 } 205 } 206 if (debug) 207 printf("clean = %d\n", sblock->fs_clean); 208 if (doswap) 209 doskipclean = 0; 210 if (sblock->fs_clean & FS_ISCLEAN) { 211 if (doskipclean) { 212 if (!quiet) 213 pwarn("%sile system is clean; not checking\n", 214 preen ? "f" : "** F"); 215 return (-1); 216 } 217 if (!preen && !doswap) 218 pwarn("** File system is already clean\n"); 219 } 220 maxfsblock = sblock->fs_size; 221 maxino = sblock->fs_ncg * sblock->fs_ipg; 222 sizepb = sblock->fs_bsize; 223 maxfilesize = sblock->fs_bsize * NDADDR - 1; 224 for (i = 0; i < NIADDR; i++) { 225 sizepb *= NINDIR(sblock); 226 maxfilesize += sizepb; 227 } 228 if ((!is_ufs2 && cvtlevel >= 4) && 229 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 230 if (preen) 231 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 232 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 233 return(0); 234 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 235 /* Disable the postbl tables */ 236 sblock->fs_old_cpc = 0; 237 sblock->fs_old_nrpos = 1; 238 sblock->fs_old_trackskew = 0; 239 /* The other fields have already been updated by 240 * sb_oldfscompat_read 241 */ 242 sbdirty(); 243 } 244 if (!is_ufs2 && cvtlevel == 3 && 245 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 246 if (preen) 247 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 248 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 249 return(0); 250 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 251 sb_oldfscompat_write(sblock, sblock); 252 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 253 /* Leave postbl tables disabled, but blank its superblock region anyway */ 254 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 255 sblock->fs_old_cpc = 0; 256 sblock->fs_old_nrpos = 1; 257 sblock->fs_old_trackskew = 0; 258 memset(&sblock->fs_old_postbl_start, 0xff, 256); 259 sb_oldfscompat_read(sblock, &sblocksave); 260 sbdirty(); 261 } 262 /* 263 * Check and potentially fix certain fields in the super block. 264 */ 265 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 266 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 267 if (reply("CLEAR") == 1) { 268 sblock->fs_flags &= FS_KNOWN_FLAGS; 269 sbdirty(); 270 } 271 } 272 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 273 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 274 if (reply("SET TO DEFAULT") == 1) { 275 sblock->fs_optim = FS_OPTTIME; 276 sbdirty(); 277 } 278 } 279 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 280 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 281 sblock->fs_minfree); 282 if (reply("SET TO DEFAULT") == 1) { 283 sblock->fs_minfree = 10; 284 sbdirty(); 285 } 286 } 287 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 288 (sblock->fs_old_interleave < 1 || 289 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 290 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 291 sblock->fs_old_interleave); 292 sblock->fs_old_interleave = 1; 293 if (preen) 294 printf(" (FIXED)\n"); 295 if (preen || reply("SET TO DEFAULT") == 1) { 296 sbdirty(); 297 dirty(&asblk); 298 } 299 } 300 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 301 (sblock->fs_old_npsect < sblock->fs_old_nsect || 302 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 303 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 304 sblock->fs_old_npsect); 305 sblock->fs_old_npsect = sblock->fs_old_nsect; 306 if (preen) 307 printf(" (FIXED)\n"); 308 if (preen || reply("SET TO DEFAULT") == 1) { 309 sbdirty(); 310 dirty(&asblk); 311 } 312 } 313 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 314 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 315 sblock->fs_bmask); 316 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 317 if (preen) 318 printf(" (FIXED)\n"); 319 if (preen || reply("FIX") == 1) { 320 sbdirty(); 321 dirty(&asblk); 322 } 323 } 324 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 325 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 326 sblock->fs_fmask); 327 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 328 if (preen) 329 printf(" (FIXED)\n"); 330 if (preen || reply("FIX") == 1) { 331 sbdirty(); 332 dirty(&asblk); 333 } 334 } 335 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) { 336 if (sblock->fs_maxfilesize != maxfilesize) { 337 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 338 (unsigned long long)sblock->fs_maxfilesize); 339 sblock->fs_maxfilesize = maxfilesize; 340 if (preen) 341 printf(" (FIXED)\n"); 342 if (preen || reply("FIX") == 1) { 343 sbdirty(); 344 dirty(&asblk); 345 } 346 } 347 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2) 348 || 349 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1)) 350 { 351 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 352 sblock->fs_maxsymlinklen); 353 sblock->fs_maxsymlinklen = is_ufs2 ? 354 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1; 355 if (preen) 356 printf(" (FIXED)\n"); 357 if (preen || reply("FIX") == 1) { 358 sbdirty(); 359 dirty(&asblk); 360 } 361 } 362 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 363 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 364 (unsigned long long)sblock->fs_qbmask); 365 sblock->fs_qbmask = ~sblock->fs_bmask; 366 if (preen) 367 printf(" (FIXED)\n"); 368 if (preen || reply("FIX") == 1) { 369 sbdirty(); 370 dirty(&asblk); 371 } 372 } 373 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 374 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 375 (unsigned long long)sblock->fs_qfmask); 376 sblock->fs_qfmask = ~sblock->fs_fmask; 377 if (preen) 378 printf(" (FIXED)\n"); 379 if (preen || reply("FIX") == 1) { 380 sbdirty(); 381 dirty(&asblk); 382 } 383 } 384 newinofmt = 1; 385 } else { 386 sblock->fs_qbmask = ~sblock->fs_bmask; 387 sblock->fs_qfmask = ~sblock->fs_fmask; 388 newinofmt = 0; 389 } 390 /* 391 * Convert to new inode format. 392 */ 393 if (!is_ufs2 && cvtlevel >= 2 && 394 sblock->fs_old_inodefmt < FS_44INODEFMT) { 395 if (preen) 396 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 397 else if (!reply("CONVERT TO NEW INODE FORMAT")) 398 return(0); 399 doinglevel2++; 400 sblock->fs_old_inodefmt = FS_44INODEFMT; 401 sblock->fs_maxfilesize = maxfilesize; 402 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; 403 sblock->fs_qbmask = ~sblock->fs_bmask; 404 sblock->fs_qfmask = ~sblock->fs_fmask; 405 sbdirty(); 406 dirty(&asblk); 407 } 408 /* 409 * Convert to new cylinder group format. 410 */ 411 if (!is_ufs2 && cvtlevel >= 1 && 412 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 413 if (preen) 414 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 415 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 416 return(0); 417 doinglevel1++; 418 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 419 sblock->fs_old_nrpos = 8; 420 sblock->fs_old_postbloff = 421 (char *)(&sblock->fs_old_postbl_start) - 422 (char *)(&sblock->fs_firstfield); 423 sblock->fs_old_rotbloff = 424 (char *)(&sblock->fs_magic+1) - 425 (char *)(&sblock->fs_firstfield); 426 sblock->fs_cgsize = 427 fragroundup(sblock, CGSIZE(sblock)); 428 sbdirty(); 429 dirty(&asblk); 430 } 431 if (asblk.b_dirty && !bflag) { 432 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 433 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 434 if (needswap) 435 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 436 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 437 flush(fswritefd, &asblk); 438 } 439 /* 440 * read in the summary info. 441 */ 442 asked = 0; 443 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 444 if (sblock->fs_csp == NULL) { 445 pwarn("cannot alloc %u bytes for summary info\n", 446 sblock->fs_cssize); 447 goto badsblabel; 448 } 449 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 450 size = sblock->fs_cssize - i < sblock->fs_bsize ? 451 sblock->fs_cssize - i : sblock->fs_bsize; 452 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 453 if (bread(fsreadfd, (char *)ccsp, 454 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 455 size) != 0 && !asked) { 456 pfatal("BAD SUMMARY INFORMATION"); 457 if (reply("CONTINUE") == 0) { 458 markclean = 0; 459 exit(FSCK_EXIT_CHECK_FAILED); 460 } 461 asked++; 462 } 463 if (doswap) { 464 ffs_csum_swap(ccsp, ccsp, size); 465 bwrite(fswritefd, (char *)ccsp, 466 fsbtodb(sblock, 467 sblock->fs_csaddr + j * sblock->fs_frag), 468 size); 469 } 470 if (needswap) 471 ffs_csum_swap(ccsp, ccsp, size); 472 } 473 /* 474 * allocate and initialize the necessary maps 475 */ 476 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 477 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 478 if (blockmap == NULL) { 479 pwarn("cannot alloc %u bytes for blockmap\n", 480 (unsigned)bmapsize); 481 goto badsblabel; 482 } 483 inostathead = calloc((unsigned)(sblock->fs_ncg), 484 sizeof(struct inostatlist)); 485 if (inostathead == NULL) { 486 pwarn("cannot alloc %u bytes for inostathead\n", 487 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 488 goto badsblabel; 489 } 490 /* 491 * cs_ndir may be inaccurate, particularly if we're using the -b 492 * option, so set a minimum to prevent bogus subdirectory reconnects 493 * and really inefficient directory scans. 494 * Also set a maximum in case the value is too large. 495 */ 496 numdirs = sblock->fs_cstotal.cs_ndir; 497 if (numdirs < 1024) 498 numdirs = 1024; 499 if (numdirs > maxino + 1) 500 numdirs = maxino + 1; 501 dirhash = numdirs; 502 inplast = 0; 503 listmax = numdirs + 10; 504 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 505 sizeof(struct inoinfo *)); 506 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 507 sizeof(struct inoinfo *)); 508 if (inpsort == NULL || inphead == NULL) { 509 pwarn("cannot alloc %u bytes for inphead\n", 510 (unsigned)(numdirs * sizeof(struct inoinfo *))); 511 goto badsblabel; 512 } 513 cgrp = malloc(sblock->fs_cgsize); 514 if (cgrp == NULL) { 515 pwarn("cannot alloc %u bytes for cylinder group\n", 516 sblock->fs_cgsize); 517 goto badsblabel; 518 } 519 bufinit(); 520 if (sblock->fs_flags & FS_DOSOFTDEP) 521 usedsoftdep = 1; 522 else 523 usedsoftdep = 0; 524 525 if (!forceimage && dkw.dkw_parent[0]) 526 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 527 isappleufs = 1; 528 529 if (readappleufs()) 530 isappleufs = 1; 531 532 dirblksiz = DIRBLKSIZ; 533 if (isappleufs) 534 dirblksiz = APPLEUFS_DIRBLKSIZ; 535 536 if (debug) 537 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 538 539 return (1); 540 541 badsblabel: 542 markclean=0; 543 ckfini(); 544 return (0); 545 } 546 547 static int 548 readappleufs(void) 549 { 550 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 551 struct appleufslabel *appleufs; 552 int i; 553 554 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 555 * being block aligned (CD's?) 556 */ 557 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 558 (long)APPLEUFS_LABEL_SIZE) != 0) 559 return 0; 560 appleufsblk.b_bno = label; 561 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 562 563 appleufs = appleufsblk.b_un.b_appleufs; 564 565 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 566 if (!isappleufs) { 567 return 0; 568 } else { 569 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 570 if (reply("FIX") == 0) { 571 return 1; 572 } 573 ffs_appleufs_set(appleufs, NULL, -1, 0); 574 appleufsdirty(); 575 } 576 } 577 578 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 579 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 580 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 581 if (preen) { 582 printf(" (CORRECTED)\n"); 583 } 584 if (preen || reply("CORRECT")) { 585 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 586 appleufsdirty(); 587 } 588 } 589 590 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 591 pwarn("APPLE UFS LABEL NAME TOO LONG"); 592 if (preen) { 593 printf(" (TRUNCATED)\n"); 594 } 595 if (preen || reply("TRUNCATE")) { 596 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 597 appleufsdirty(); 598 } 599 } 600 601 if (ntohs(appleufs->ul_namelen) == 0) { 602 pwarn("MISSING APPLE UFS LABEL NAME"); 603 if (preen) { 604 printf(" (FIXED)\n"); 605 } 606 if (preen || reply("FIX")) { 607 ffs_appleufs_set(appleufs, NULL, -1, 0); 608 appleufsdirty(); 609 } 610 } 611 612 /* Scan name for first illegal character */ 613 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 614 if ((appleufs->ul_name[i] == '\0') || 615 (appleufs->ul_name[i] == ':') || 616 (appleufs->ul_name[i] == '/')) { 617 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 618 if (preen) { 619 printf(" (TRUNCATED)\n"); 620 } 621 if (preen || reply("TRUNCATE")) { 622 appleufs->ul_namelen = i+1; 623 appleufsdirty(); 624 } 625 break; 626 } 627 } 628 629 /* Check the checksum last, because if anything else was wrong, 630 * then the checksum gets reset anyway. 631 */ 632 appleufs->ul_checksum = 0; 633 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 634 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 635 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 636 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 637 if (preen) { 638 printf(" (CORRECTED)\n"); 639 } 640 if (preen || reply("CORRECT")) { 641 appleufsdirty(); 642 } else { 643 /* put the incorrect checksum back in place */ 644 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 645 } 646 } 647 return 1; 648 } 649 650 /* 651 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 652 */ 653 static int 654 detect_byteorder(struct fs *fs, int sblockoff) 655 { 656 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 657 fs->fs_magic == bswap32(FS_UFS1_MAGIC))) 658 /* Likely to be the first alternate of a fs with 64k blocks */ 659 return -1; 660 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 661 if (endian == 0 || BYTE_ORDER == endian) { 662 needswap = 0; 663 doswap = do_blkswap = do_dirswap = 0; 664 } else { 665 needswap = 1; 666 doswap = do_blkswap = do_dirswap = 1; 667 } 668 return 0; 669 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) || 670 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 671 if (endian == 0 || BYTE_ORDER != endian) { 672 needswap = 1; 673 doswap = do_blkswap = do_dirswap = 0; 674 } else { 675 needswap = 0; 676 doswap = do_blkswap = do_dirswap = 1; 677 } 678 return 0; 679 } 680 return -1; 681 } 682 683 /* 684 * Possible superblock locations ordered from most to least likely. 685 */ 686 static off_t sblock_try[] = SBLOCKSEARCH; 687 688 /* 689 * Read in the super block and its summary info. 690 */ 691 static int 692 readsb(int listerr) 693 { 694 daddr_t super = 0; 695 struct fs *fs; 696 int i; 697 698 if (bflag) { 699 super = bflag; 700 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 701 (long)SBLOCKSIZE) != 0) 702 return (0); 703 fs = sblk.b_un.b_fs; 704 if (detect_byteorder(fs, -1) < 0) { 705 badsb(listerr, "MAGIC NUMBER WRONG"); 706 return (0); 707 } 708 } else { 709 for (i = 0; sblock_try[i] != -1; i++) { 710 super = sblock_try[i] / dev_bsize; 711 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 712 super, (long)SBLOCKSIZE) != 0) 713 continue; 714 fs = sblk.b_un.b_fs; 715 if (detect_byteorder(fs, sblock_try[i]) == 0) 716 break; 717 } 718 if (sblock_try[i] == -1) { 719 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 720 return (0); 721 } 722 } 723 if (doswap) { 724 if (preen) 725 errx(FSCK_EXIT_USAGE, 726 "Incompatible options -B and -p"); 727 if (nflag) 728 errx(FSCK_EXIT_USAGE, 729 "Incompatible options -B and -n"); 730 if (endian == LITTLE_ENDIAN) { 731 if (!reply("CONVERT TO LITTLE ENDIAN")) 732 return 0; 733 } else if (endian == BIG_ENDIAN) { 734 if (!reply("CONVERT TO BIG ENDIAN")) 735 return 0; 736 } else 737 pfatal("INTERNAL ERROR: unknown endian"); 738 } 739 if (needswap) 740 pwarn("** Swapped byte order\n"); 741 /* swap SB byte order if asked */ 742 if (doswap) 743 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 744 745 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 746 if (needswap) 747 ffs_sb_swap(sblk.b_un.b_fs, sblock); 748 749 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 750 751 /* 752 * run a few consistency checks of the super block 753 */ 754 if (sblock->fs_sbsize > SBLOCKSIZE) 755 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 756 /* 757 * Compute block size that the filesystem is based on, 758 * according to fsbtodb, and adjust superblock block number 759 * so we can tell if this is an alternate later. 760 */ 761 super *= dev_bsize; 762 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 763 sblk.b_bno = super / dev_bsize; 764 sblk.b_size = SBLOCKSIZE; 765 if (bflag) 766 goto out; 767 /* 768 * Set all possible fields that could differ, then do check 769 * of whole super block against an alternate super block-> 770 * When an alternate super-block is specified this check is skipped. 771 */ 772 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 773 if (asblk.b_errs) 774 return (0); 775 /* swap SB byte order if asked */ 776 if (doswap) 777 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 778 779 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 780 if (needswap) 781 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 782 if (cmpsblks(sblock, altsblock)) { 783 if (debug) { 784 uint32_t *nlp, *olp, *endlp; 785 786 printf("superblock mismatches\n"); 787 nlp = (uint32_t *)altsblock; 788 olp = (uint32_t *)sblock; 789 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 790 for ( ; olp < endlp; olp++, nlp++) { 791 if (*olp == *nlp) 792 continue; 793 printf("offset %#x, original 0x%08x, alternate " 794 "0x%08x\n", 795 (int)((uint8_t *)olp-(uint8_t *)sblock), 796 *olp, *nlp); 797 } 798 } 799 badsb(listerr, 800 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 801 /* 802 return (0); 803 */ 804 } 805 out: 806 807 sb_oldfscompat_read(sblock, &sblocksave); 808 809 /* Now we know the SB is valid, we can write it back if needed */ 810 if (doswap) { 811 sbdirty(); 812 dirty(&asblk); 813 } 814 havesb = 1; 815 return (1); 816 } 817 818 int 819 cmpsblks(const struct fs *sb, struct fs *asb) 820 { 821 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 822 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 823 return cmpsblks42(sb, asb); 824 else 825 return cmpsblks44(sb, asb); 826 } 827 if (asb->fs_sblkno != sb->fs_sblkno || 828 asb->fs_cblkno != sb->fs_cblkno || 829 asb->fs_iblkno != sb->fs_iblkno || 830 asb->fs_dblkno != sb->fs_dblkno || 831 asb->fs_ncg != sb->fs_ncg || 832 asb->fs_bsize != sb->fs_bsize || 833 asb->fs_fsize != sb->fs_fsize || 834 asb->fs_frag != sb->fs_frag || 835 asb->fs_bmask != sb->fs_bmask || 836 asb->fs_fmask != sb->fs_fmask || 837 asb->fs_bshift != sb->fs_bshift || 838 asb->fs_fshift != sb->fs_fshift || 839 asb->fs_fragshift != sb->fs_fragshift || 840 asb->fs_fsbtodb != sb->fs_fsbtodb || 841 asb->fs_sbsize != sb->fs_sbsize || 842 asb->fs_nindir != sb->fs_nindir || 843 asb->fs_inopb != sb->fs_inopb || 844 asb->fs_cssize != sb->fs_cssize || 845 asb->fs_ipg != sb->fs_ipg || 846 asb->fs_fpg != sb->fs_fpg || 847 asb->fs_magic != sb->fs_magic) 848 return 1; 849 return 0; 850 } 851 852 /* BSD 4.2 performed the following superblock comparison 853 * It should correspond to FS_42POSTBLFMT 854 * (although note that in 4.2, the fs_old_postblformat 855 * field didn't exist and the corresponding bits are 856 * located near the end of the postbl itself, where they 857 * are not likely to be used.) 858 */ 859 int 860 cmpsblks42(const struct fs *sb, struct fs *asb) 861 { 862 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 863 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 864 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 865 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 866 asb->fs_cgrotor = sb->fs_cgrotor; 867 asb->fs_fmod = sb->fs_fmod; 868 asb->fs_clean = sb->fs_clean; 869 asb->fs_ronly = sb->fs_ronly; 870 asb->fs_old_flags = sb->fs_old_flags; 871 asb->fs_maxcontig = sb->fs_maxcontig; 872 asb->fs_minfree = sb->fs_minfree; 873 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 874 asb->fs_maxbpg = sb->fs_maxbpg; 875 876 /* The former fs_csp, totaling 128 bytes */ 877 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 878 asb->fs_contigdirs = sb->fs_contigdirs; 879 asb->fs_csp = sb->fs_csp; 880 asb->fs_maxcluster = sb->fs_maxcluster; 881 asb->fs_active = sb->fs_active; 882 883 /* The former fs_fsmnt, totaling 512 bytes */ 884 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 885 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 886 887 return memcmp(sb, asb, sb->fs_sbsize); 888 } 889 890 /* BSD 4.4 performed the following superblock comparison 891 * This was used in NetBSD through 1.6.1 892 * 893 * Note that this implementation is destructive to asb. 894 */ 895 int 896 cmpsblks44(const struct fs *sb, struct fs *asb) 897 { 898 /* 899 * "Copy fields which we don't care if they're different in the 900 * alternate superblocks, as they're either likely to be 901 * different because they're per-cylinder-group specific, or 902 * because they're transient details which are only maintained 903 * in the primary superblock." 904 */ 905 asb->fs_firstfield = sb->fs_firstfield; 906 asb->fs_unused_1 = sb->fs_unused_1; 907 asb->fs_old_time = sb->fs_old_time; 908 asb->fs_old_cstotal = sb->fs_old_cstotal; 909 asb->fs_cgrotor = sb->fs_cgrotor; 910 asb->fs_fmod = sb->fs_fmod; 911 asb->fs_clean = sb->fs_clean; 912 asb->fs_ronly = sb->fs_ronly; 913 asb->fs_old_flags = sb->fs_old_flags; 914 asb->fs_maxcontig = sb->fs_maxcontig; 915 asb->fs_minfree = sb->fs_minfree; 916 asb->fs_optim = sb->fs_optim; 917 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 918 asb->fs_maxbpg = sb->fs_maxbpg; 919 920 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 921 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 922 asb->fs_contigdirs = sb->fs_contigdirs; 923 asb->fs_csp = sb->fs_csp; 924 asb->fs_maxcluster = sb->fs_maxcluster; 925 asb->fs_active = sb->fs_active; 926 927 /* The former fs_fsmnt, totaling 512 bytes */ 928 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 929 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 930 931 /* The former fs_sparecon, totaling 200 bytes */ 932 memmove(asb->fs_snapinum, 933 sb->fs_snapinum, sizeof sb->fs_snapinum); 934 asb->fs_avgfilesize = sb->fs_avgfilesize; 935 asb->fs_avgfpdir = sb->fs_avgfpdir; 936 asb->fs_save_cgsize = sb->fs_save_cgsize; 937 memmove(asb->fs_sparecon32, 938 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 939 asb->fs_flags = sb->fs_flags; 940 941 /* Original comment: 942 * "The following should not have to be copied, but need to be." 943 */ 944 asb->fs_fsbtodb = sb->fs_fsbtodb; 945 asb->fs_old_interleave = sb->fs_old_interleave; 946 asb->fs_old_npsect = sb->fs_old_npsect; 947 asb->fs_old_nrpos = sb->fs_old_nrpos; 948 asb->fs_state = sb->fs_state; 949 asb->fs_qbmask = sb->fs_qbmask; 950 asb->fs_qfmask = sb->fs_qfmask; 951 asb->fs_state = sb->fs_state; 952 asb->fs_maxfilesize = sb->fs_maxfilesize; 953 954 /* 955 * "Compare the superblocks, effectively checking every other 956 * field to see if they differ." 957 */ 958 return memcmp(sb, asb, sb->fs_sbsize); 959 } 960 961 962 static void 963 badsb(int listerr, const char *s) 964 { 965 966 if (!listerr) 967 return; 968 if (preen) 969 printf("%s: ", cdevname()); 970 pfatal("BAD SUPER BLOCK: %s\n", s); 971 } 972 973 /* 974 * Calculate a prototype superblock based on information in the disk label. 975 * When done the cgsblock macro can be calculated and the fs_ncg field 976 * can be used. Do NOT attempt to use other macros without verifying that 977 * their needed information is available! 978 */ 979 static int 980 calcsb(const char *dev, int devfd, struct fs *fs) 981 { 982 struct dkwedge_info dkw; 983 struct disk_geom geo; 984 int i, nspf; 985 986 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 987 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 988 if (dkw.dkw_parent[0] == '\0') { 989 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 990 return (0); 991 } 992 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) && 993 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS)) { 994 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 995 dev, dkw.dkw_ptype); 996 return (0); 997 } 998 if (geo.dg_secsize == 0) { 999 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 1000 return 0; 1001 } 1002 if (geo.dg_secpercyl == 0) { 1003 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 1004 return 0; 1005 } 1006 if (sblk.b_un.b_fs->fs_fsize == 0) { 1007 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 1008 return 0; 1009 } 1010 if (sblk.b_un.b_fs->fs_fpg == 0) { 1011 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1012 return 0; 1013 } 1014 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1015 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1016 return 0; 1017 } 1018 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1019 nspf = fs->fs_fsize / geo.dg_secsize; 1020 fs->fs_old_nspf = nspf; 1021 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1022 fs->fs_fsbtodb++; 1023 dev_bsize = geo.dg_secsize; 1024 if (fs->fs_magic == FS_UFS2_MAGIC) { 1025 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1026 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1027 fs->fs_old_cgmask = 0xffffffff; 1028 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1029 fs->fs_old_cgmask <<= 1; 1030 if (!POWEROF2(geo.dg_ntracks)) 1031 fs->fs_old_cgmask <<= 1; 1032 fs->fs_old_cgoffset = roundup( 1033 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1034 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1035 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1036 fs->fs_old_cpg); 1037 } 1038 return (1); 1039 } 1040
Indexes created Sun Sep 28 16:09:52 GMT 2025