setup.c revision 1.85
1 /* $NetBSD: setup.c,v 1.85 2009/02/25 13:52:18 christos 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 1.85 2009/02/25 13:52:18 christos 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 if (sblock->fs_flags & FS_DOWAPBL) { 177 if (preen) { 178 if (!quiet) 179 pwarn("file system is journaled; not checking\n"); 180 return (-1); 181 } 182 if (!quiet) 183 pwarn("** File system is journaled; replaying journal\n"); 184 replay_wapbl(); 185 doskipclean = 0; 186 sblock->fs_flags &= ~FS_DOWAPBL; 187 sbdirty(); 188 /* Although we may have updated the superblock from the 189 * journal, we are still going to do a full check, so we 190 * don't bother to re-read the superblock from the journal. 191 * XXX, instead we could re-read the superblock and then not 192 * force doskipclean = 0 193 */ 194 } 195 if (debug) 196 printf("clean = %d\n", sblock->fs_clean); 197 if (doswap) 198 doskipclean = 0; 199 if (sblock->fs_clean & FS_ISCLEAN) { 200 if (doskipclean) { 201 if (!quiet) 202 pwarn("%sile system is clean; not checking\n", 203 preen ? "f" : "** F"); 204 return (-1); 205 } 206 if (!preen && !doswap) 207 pwarn("** File system is already clean\n"); 208 } 209 maxfsblock = sblock->fs_size; 210 maxino = sblock->fs_ncg * sblock->fs_ipg; 211 sizepb = sblock->fs_bsize; 212 maxfilesize = sblock->fs_bsize * NDADDR - 1; 213 for (i = 0; i < NIADDR; i++) { 214 sizepb *= NINDIR(sblock); 215 maxfilesize += sizepb; 216 } 217 if ((!is_ufs2 && cvtlevel >= 4) && 218 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 219 if (preen) 220 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 221 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 222 return(0); 223 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 224 /* Disable the postbl tables */ 225 sblock->fs_old_cpc = 0; 226 sblock->fs_old_nrpos = 1; 227 sblock->fs_old_trackskew = 0; 228 /* The other fields have already been updated by 229 * sb_oldfscompat_read 230 */ 231 sbdirty(); 232 } 233 if (!is_ufs2 && cvtlevel == 3 && 234 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 235 if (preen) 236 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 237 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 238 return(0); 239 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 240 sb_oldfscompat_write(sblock, sblock); 241 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 242 /* Leave postbl tables disabled, but blank its superblock region anyway */ 243 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 244 sblock->fs_old_cpc = 0; 245 sblock->fs_old_nrpos = 1; 246 sblock->fs_old_trackskew = 0; 247 memset(&sblock->fs_old_postbl_start, 0xff, 256); 248 sb_oldfscompat_read(sblock, &sblocksave); 249 sbdirty(); 250 } 251 /* 252 * Check and potentially fix certain fields in the super block. 253 */ 254 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 255 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 256 if (reply("CLEAR") == 1) { 257 sblock->fs_flags &= FS_KNOWN_FLAGS; 258 sbdirty(); 259 } 260 } 261 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 262 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 263 if (reply("SET TO DEFAULT") == 1) { 264 sblock->fs_optim = FS_OPTTIME; 265 sbdirty(); 266 } 267 } 268 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 269 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 270 sblock->fs_minfree); 271 if (reply("SET TO DEFAULT") == 1) { 272 sblock->fs_minfree = 10; 273 sbdirty(); 274 } 275 } 276 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 277 (sblock->fs_old_interleave < 1 || 278 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 279 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 280 sblock->fs_old_interleave); 281 sblock->fs_old_interleave = 1; 282 if (preen) 283 printf(" (FIXED)\n"); 284 if (preen || reply("SET TO DEFAULT") == 1) { 285 sbdirty(); 286 dirty(&asblk); 287 } 288 } 289 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 290 (sblock->fs_old_npsect < sblock->fs_old_nsect || 291 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 292 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 293 sblock->fs_old_npsect); 294 sblock->fs_old_npsect = sblock->fs_old_nsect; 295 if (preen) 296 printf(" (FIXED)\n"); 297 if (preen || reply("SET TO DEFAULT") == 1) { 298 sbdirty(); 299 dirty(&asblk); 300 } 301 } 302 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 303 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 304 sblock->fs_bmask); 305 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 306 if (preen) 307 printf(" (FIXED)\n"); 308 if (preen || reply("FIX") == 1) { 309 sbdirty(); 310 dirty(&asblk); 311 } 312 } 313 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 314 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 315 sblock->fs_fmask); 316 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 317 if (preen) 318 printf(" (FIXED)\n"); 319 if (preen || reply("FIX") == 1) { 320 sbdirty(); 321 dirty(&asblk); 322 } 323 } 324 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) { 325 if (sblock->fs_maxfilesize != maxfilesize) { 326 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 327 (unsigned long long)sblock->fs_maxfilesize); 328 sblock->fs_maxfilesize = maxfilesize; 329 if (preen) 330 printf(" (FIXED)\n"); 331 if (preen || reply("FIX") == 1) { 332 sbdirty(); 333 dirty(&asblk); 334 } 335 } 336 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2) 337 || 338 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1)) 339 { 340 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 341 sblock->fs_maxsymlinklen); 342 sblock->fs_maxsymlinklen = is_ufs2 ? 343 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1; 344 if (preen) 345 printf(" (FIXED)\n"); 346 if (preen || reply("FIX") == 1) { 347 sbdirty(); 348 dirty(&asblk); 349 } 350 } 351 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 352 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 353 (unsigned long long)sblock->fs_qbmask); 354 sblock->fs_qbmask = ~sblock->fs_bmask; 355 if (preen) 356 printf(" (FIXED)\n"); 357 if (preen || reply("FIX") == 1) { 358 sbdirty(); 359 dirty(&asblk); 360 } 361 } 362 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 363 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 364 (unsigned long long)sblock->fs_qfmask); 365 sblock->fs_qfmask = ~sblock->fs_fmask; 366 if (preen) 367 printf(" (FIXED)\n"); 368 if (preen || reply("FIX") == 1) { 369 sbdirty(); 370 dirty(&asblk); 371 } 372 } 373 newinofmt = 1; 374 } else { 375 sblock->fs_qbmask = ~sblock->fs_bmask; 376 sblock->fs_qfmask = ~sblock->fs_fmask; 377 newinofmt = 0; 378 } 379 /* 380 * Convert to new inode format. 381 */ 382 if (!is_ufs2 && cvtlevel >= 2 && 383 sblock->fs_old_inodefmt < FS_44INODEFMT) { 384 if (preen) 385 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 386 else if (!reply("CONVERT TO NEW INODE FORMAT")) 387 return(0); 388 doinglevel2++; 389 sblock->fs_old_inodefmt = FS_44INODEFMT; 390 sblock->fs_maxfilesize = maxfilesize; 391 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; 392 sblock->fs_qbmask = ~sblock->fs_bmask; 393 sblock->fs_qfmask = ~sblock->fs_fmask; 394 sbdirty(); 395 dirty(&asblk); 396 } 397 /* 398 * Convert to new cylinder group format. 399 */ 400 if (!is_ufs2 && cvtlevel >= 1 && 401 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 402 if (preen) 403 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 404 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 405 return(0); 406 doinglevel1++; 407 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 408 sblock->fs_old_nrpos = 8; 409 sblock->fs_old_postbloff = 410 (char *)(&sblock->fs_old_postbl_start) - 411 (char *)(&sblock->fs_firstfield); 412 sblock->fs_old_rotbloff = 413 (char *)(&sblock->fs_magic+1) - 414 (char *)(&sblock->fs_firstfield); 415 sblock->fs_cgsize = 416 fragroundup(sblock, CGSIZE(sblock)); 417 sbdirty(); 418 dirty(&asblk); 419 } 420 if (asblk.b_dirty && !bflag) { 421 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 422 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 423 if (needswap) 424 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 425 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 426 flush(fswritefd, &asblk); 427 } 428 /* 429 * read in the summary info. 430 */ 431 asked = 0; 432 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 433 if (sblock->fs_csp == NULL) { 434 pwarn("cannot alloc %u bytes for summary info\n", 435 sblock->fs_cssize); 436 goto badsblabel; 437 } 438 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 439 size = sblock->fs_cssize - i < sblock->fs_bsize ? 440 sblock->fs_cssize - i : sblock->fs_bsize; 441 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 442 if (bread(fsreadfd, (char *)ccsp, 443 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 444 size) != 0 && !asked) { 445 pfatal("BAD SUMMARY INFORMATION"); 446 if (reply("CONTINUE") == 0) { 447 markclean = 0; 448 exit(FSCK_EXIT_CHECK_FAILED); 449 } 450 asked++; 451 } 452 if (doswap) { 453 ffs_csum_swap(ccsp, ccsp, size); 454 bwrite(fswritefd, (char *)ccsp, 455 fsbtodb(sblock, 456 sblock->fs_csaddr + j * sblock->fs_frag), 457 size); 458 } 459 if (needswap) 460 ffs_csum_swap(ccsp, ccsp, size); 461 } 462 /* 463 * allocate and initialize the necessary maps 464 */ 465 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 466 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 467 if (blockmap == NULL) { 468 pwarn("cannot alloc %u bytes for blockmap\n", 469 (unsigned)bmapsize); 470 goto badsblabel; 471 } 472 inostathead = calloc((unsigned)(sblock->fs_ncg), 473 sizeof(struct inostatlist)); 474 if (inostathead == NULL) { 475 pwarn("cannot alloc %u bytes for inostathead\n", 476 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 477 goto badsblabel; 478 } 479 /* 480 * cs_ndir may be inaccurate, particularly if we're using the -b 481 * option, so set a minimum to prevent bogus subdirectory reconnects 482 * and really inefficient directory scans. 483 * Also set a maximum in case the value is too large. 484 */ 485 numdirs = sblock->fs_cstotal.cs_ndir; 486 if (numdirs < 1024) 487 numdirs = 1024; 488 if (numdirs > maxino + 1) 489 numdirs = maxino + 1; 490 dirhash = numdirs; 491 inplast = 0; 492 listmax = numdirs + 10; 493 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 494 sizeof(struct inoinfo *)); 495 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 496 sizeof(struct inoinfo *)); 497 if (inpsort == NULL || inphead == NULL) { 498 pwarn("cannot alloc %u bytes for inphead\n", 499 (unsigned)(numdirs * sizeof(struct inoinfo *))); 500 goto badsblabel; 501 } 502 cgrp = malloc(sblock->fs_cgsize); 503 if (cgrp == NULL) { 504 pwarn("cannot alloc %u bytes for cylinder group\n", 505 sblock->fs_cgsize); 506 goto badsblabel; 507 } 508 bufinit(); 509 if (sblock->fs_flags & FS_DOSOFTDEP) 510 usedsoftdep = 1; 511 else 512 usedsoftdep = 0; 513 514 if (!forceimage && dkw.dkw_parent[0]) 515 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 516 isappleufs = 1; 517 518 if (readappleufs()) 519 isappleufs = 1; 520 521 dirblksiz = DIRBLKSIZ; 522 if (isappleufs) 523 dirblksiz = APPLEUFS_DIRBLKSIZ; 524 525 if (debug) 526 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 527 528 return (1); 529 530 badsblabel: 531 markclean=0; 532 ckfini(); 533 return (0); 534 } 535 536 static int 537 readappleufs(void) 538 { 539 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 540 struct appleufslabel *appleufs; 541 int i; 542 543 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 544 * being block aligned (CD's?) 545 */ 546 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 547 (long)APPLEUFS_LABEL_SIZE) != 0) 548 return 0; 549 appleufsblk.b_bno = label; 550 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 551 552 appleufs = appleufsblk.b_un.b_appleufs; 553 554 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 555 if (!isappleufs) { 556 return 0; 557 } else { 558 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 559 if (reply("FIX") == 0) { 560 return 1; 561 } 562 ffs_appleufs_set(appleufs, NULL, -1, 0); 563 appleufsdirty(); 564 } 565 } 566 567 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 568 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 569 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 570 if (preen) { 571 printf(" (CORRECTED)\n"); 572 } 573 if (preen || reply("CORRECT")) { 574 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 575 appleufsdirty(); 576 } 577 } 578 579 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 580 pwarn("APPLE UFS LABEL NAME TOO LONG"); 581 if (preen) { 582 printf(" (TRUNCATED)\n"); 583 } 584 if (preen || reply("TRUNCATE")) { 585 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 586 appleufsdirty(); 587 } 588 } 589 590 if (ntohs(appleufs->ul_namelen) == 0) { 591 pwarn("MISSING APPLE UFS LABEL NAME"); 592 if (preen) { 593 printf(" (FIXED)\n"); 594 } 595 if (preen || reply("FIX")) { 596 ffs_appleufs_set(appleufs, NULL, -1, 0); 597 appleufsdirty(); 598 } 599 } 600 601 /* Scan name for first illegal character */ 602 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 603 if ((appleufs->ul_name[i] == '\0') || 604 (appleufs->ul_name[i] == ':') || 605 (appleufs->ul_name[i] == '/')) { 606 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 607 if (preen) { 608 printf(" (TRUNCATED)\n"); 609 } 610 if (preen || reply("TRUNCATE")) { 611 appleufs->ul_namelen = i+1; 612 appleufsdirty(); 613 } 614 break; 615 } 616 } 617 618 /* Check the checksum last, because if anything else was wrong, 619 * then the checksum gets reset anyway. 620 */ 621 appleufs->ul_checksum = 0; 622 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 623 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 624 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 625 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 626 if (preen) { 627 printf(" (CORRECTED)\n"); 628 } 629 if (preen || reply("CORRECT")) { 630 appleufsdirty(); 631 } else { 632 /* put the incorrect checksum back in place */ 633 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 634 } 635 } 636 return 1; 637 } 638 639 /* 640 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 641 */ 642 static int 643 detect_byteorder(struct fs *fs, int sblockoff) 644 { 645 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 646 fs->fs_magic == bswap32(FS_UFS1_MAGIC))) 647 /* Likely to be the first alternate of a fs with 64k blocks */ 648 return -1; 649 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 650 if (endian == 0 || BYTE_ORDER == endian) { 651 needswap = 0; 652 doswap = do_blkswap = do_dirswap = 0; 653 } else { 654 needswap = 1; 655 doswap = do_blkswap = do_dirswap = 1; 656 } 657 return 0; 658 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) || 659 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 660 if (endian == 0 || BYTE_ORDER != endian) { 661 needswap = 1; 662 doswap = do_blkswap = do_dirswap = 0; 663 } else { 664 needswap = 0; 665 doswap = do_blkswap = do_dirswap = 1; 666 } 667 return 0; 668 } 669 return -1; 670 } 671 672 /* 673 * Possible superblock locations ordered from most to least likely. 674 */ 675 static off_t sblock_try[] = SBLOCKSEARCH; 676 677 /* 678 * Read in the super block and its summary info. 679 */ 680 static int 681 readsb(int listerr) 682 { 683 daddr_t super = 0; 684 struct fs *fs; 685 int i; 686 687 if (bflag) { 688 super = bflag; 689 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 690 (long)SBLOCKSIZE) != 0) 691 return (0); 692 fs = sblk.b_un.b_fs; 693 if (detect_byteorder(fs, -1) < 0) { 694 badsb(listerr, "MAGIC NUMBER WRONG"); 695 return (0); 696 } 697 } else { 698 for (i = 0; sblock_try[i] != -1; i++) { 699 super = sblock_try[i] / dev_bsize; 700 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 701 super, (long)SBLOCKSIZE) != 0) 702 continue; 703 fs = sblk.b_un.b_fs; 704 if (detect_byteorder(fs, sblock_try[i]) == 0) 705 break; 706 } 707 if (sblock_try[i] == -1) { 708 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 709 return (0); 710 } 711 } 712 if (doswap) { 713 if (preen) 714 errx(FSCK_EXIT_USAGE, 715 "Incompatible options -B and -p"); 716 if (nflag) 717 errx(FSCK_EXIT_USAGE, 718 "Incompatible options -B and -n"); 719 if (endian == LITTLE_ENDIAN) { 720 if (!reply("CONVERT TO LITTLE ENDIAN")) 721 return 0; 722 } else if (endian == BIG_ENDIAN) { 723 if (!reply("CONVERT TO BIG ENDIAN")) 724 return 0; 725 } else 726 pfatal("INTERNAL ERROR: unknown endian"); 727 } 728 if (needswap) 729 pwarn("** Swapped byte order\n"); 730 /* swap SB byte order if asked */ 731 if (doswap) 732 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 733 734 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 735 if (needswap) 736 ffs_sb_swap(sblk.b_un.b_fs, sblock); 737 738 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 739 740 /* 741 * run a few consistency checks of the super block 742 */ 743 if (sblock->fs_sbsize > SBLOCKSIZE) 744 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 745 /* 746 * Compute block size that the filesystem is based on, 747 * according to fsbtodb, and adjust superblock block number 748 * so we can tell if this is an alternate later. 749 */ 750 super *= dev_bsize; 751 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 752 sblk.b_bno = super / dev_bsize; 753 sblk.b_size = SBLOCKSIZE; 754 if (bflag) 755 goto out; 756 /* 757 * Set all possible fields that could differ, then do check 758 * of whole super block against an alternate super block-> 759 * When an alternate super-block is specified this check is skipped. 760 */ 761 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 762 if (asblk.b_errs) 763 return (0); 764 /* swap SB byte order if asked */ 765 if (doswap) 766 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 767 768 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 769 if (needswap) 770 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 771 if (cmpsblks(sblock, altsblock)) { 772 if (debug) { 773 uint32_t *nlp, *olp, *endlp; 774 775 printf("superblock mismatches\n"); 776 nlp = (uint32_t *)altsblock; 777 olp = (uint32_t *)sblock; 778 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 779 for ( ; olp < endlp; olp++, nlp++) { 780 if (*olp == *nlp) 781 continue; 782 printf("offset %#x, original 0x%08x, alternate " 783 "0x%08x\n", 784 (int)((uint8_t *)olp-(uint8_t *)sblock), 785 *olp, *nlp); 786 } 787 } 788 badsb(listerr, 789 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 790 /* 791 return (0); 792 */ 793 } 794 out: 795 796 sb_oldfscompat_read(sblock, &sblocksave); 797 798 /* Now we know the SB is valid, we can write it back if needed */ 799 if (doswap) { 800 sbdirty(); 801 dirty(&asblk); 802 } 803 havesb = 1; 804 return (1); 805 } 806 807 int 808 cmpsblks(const struct fs *sb, struct fs *asb) 809 { 810 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 811 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 812 return cmpsblks42(sb, asb); 813 else 814 return cmpsblks44(sb, asb); 815 } 816 if (asb->fs_sblkno != sb->fs_sblkno || 817 asb->fs_cblkno != sb->fs_cblkno || 818 asb->fs_iblkno != sb->fs_iblkno || 819 asb->fs_dblkno != sb->fs_dblkno || 820 asb->fs_ncg != sb->fs_ncg || 821 asb->fs_bsize != sb->fs_bsize || 822 asb->fs_fsize != sb->fs_fsize || 823 asb->fs_frag != sb->fs_frag || 824 asb->fs_bmask != sb->fs_bmask || 825 asb->fs_fmask != sb->fs_fmask || 826 asb->fs_bshift != sb->fs_bshift || 827 asb->fs_fshift != sb->fs_fshift || 828 asb->fs_fragshift != sb->fs_fragshift || 829 asb->fs_fsbtodb != sb->fs_fsbtodb || 830 asb->fs_sbsize != sb->fs_sbsize || 831 asb->fs_nindir != sb->fs_nindir || 832 asb->fs_inopb != sb->fs_inopb || 833 asb->fs_cssize != sb->fs_cssize || 834 asb->fs_ipg != sb->fs_ipg || 835 asb->fs_fpg != sb->fs_fpg || 836 asb->fs_magic != sb->fs_magic) 837 return 1; 838 return 0; 839 } 840 841 /* BSD 4.2 performed the following superblock comparison 842 * It should correspond to FS_42POSTBLFMT 843 * (although note that in 4.2, the fs_old_postblformat 844 * field didn't exist and the corresponding bits are 845 * located near the end of the postbl itself, where they 846 * are not likely to be used.) 847 */ 848 int 849 cmpsblks42(const struct fs *sb, struct fs *asb) 850 { 851 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 852 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 853 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 854 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 855 asb->fs_cgrotor = sb->fs_cgrotor; 856 asb->fs_fmod = sb->fs_fmod; 857 asb->fs_clean = sb->fs_clean; 858 asb->fs_ronly = sb->fs_ronly; 859 asb->fs_old_flags = sb->fs_old_flags; 860 asb->fs_maxcontig = sb->fs_maxcontig; 861 asb->fs_minfree = sb->fs_minfree; 862 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 863 asb->fs_maxbpg = sb->fs_maxbpg; 864 865 /* The former fs_csp, totaling 128 bytes */ 866 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 867 asb->fs_contigdirs = sb->fs_contigdirs; 868 asb->fs_csp = sb->fs_csp; 869 asb->fs_maxcluster = sb->fs_maxcluster; 870 asb->fs_active = sb->fs_active; 871 872 /* The former fs_fsmnt, totaling 512 bytes */ 873 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 874 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 875 876 return memcmp(sb, asb, sb->fs_sbsize); 877 } 878 879 /* BSD 4.4 performed the following superblock comparison 880 * This was used in NetBSD through 1.6.1 881 * 882 * Note that this implementation is destructive to asb. 883 */ 884 int 885 cmpsblks44(const struct fs *sb, struct fs *asb) 886 { 887 /* 888 * "Copy fields which we don't care if they're different in the 889 * alternate superblocks, as they're either likely to be 890 * different because they're per-cylinder-group specific, or 891 * because they're transient details which are only maintained 892 * in the primary superblock." 893 */ 894 asb->fs_firstfield = sb->fs_firstfield; 895 asb->fs_unused_1 = sb->fs_unused_1; 896 asb->fs_old_time = sb->fs_old_time; 897 asb->fs_old_cstotal = sb->fs_old_cstotal; 898 asb->fs_cgrotor = sb->fs_cgrotor; 899 asb->fs_fmod = sb->fs_fmod; 900 asb->fs_clean = sb->fs_clean; 901 asb->fs_ronly = sb->fs_ronly; 902 asb->fs_old_flags = sb->fs_old_flags; 903 asb->fs_maxcontig = sb->fs_maxcontig; 904 asb->fs_minfree = sb->fs_minfree; 905 asb->fs_optim = sb->fs_optim; 906 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 907 asb->fs_maxbpg = sb->fs_maxbpg; 908 909 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 910 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 911 asb->fs_contigdirs = sb->fs_contigdirs; 912 asb->fs_csp = sb->fs_csp; 913 asb->fs_maxcluster = sb->fs_maxcluster; 914 asb->fs_active = sb->fs_active; 915 916 /* The former fs_fsmnt, totaling 512 bytes */ 917 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 918 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 919 920 /* The former fs_sparecon, totaling 200 bytes */ 921 memmove(asb->fs_snapinum, 922 sb->fs_snapinum, sizeof sb->fs_snapinum); 923 asb->fs_avgfilesize = sb->fs_avgfilesize; 924 asb->fs_avgfpdir = sb->fs_avgfpdir; 925 asb->fs_save_cgsize = sb->fs_save_cgsize; 926 memmove(asb->fs_sparecon32, 927 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 928 asb->fs_flags = sb->fs_flags; 929 930 /* Original comment: 931 * "The following should not have to be copied, but need to be." 932 */ 933 asb->fs_fsbtodb = sb->fs_fsbtodb; 934 asb->fs_old_interleave = sb->fs_old_interleave; 935 asb->fs_old_npsect = sb->fs_old_npsect; 936 asb->fs_old_nrpos = sb->fs_old_nrpos; 937 asb->fs_state = sb->fs_state; 938 asb->fs_qbmask = sb->fs_qbmask; 939 asb->fs_qfmask = sb->fs_qfmask; 940 asb->fs_state = sb->fs_state; 941 asb->fs_maxfilesize = sb->fs_maxfilesize; 942 943 /* 944 * "Compare the superblocks, effectively checking every other 945 * field to see if they differ." 946 */ 947 return memcmp(sb, asb, sb->fs_sbsize); 948 } 949 950 951 static void 952 badsb(int listerr, const char *s) 953 { 954 955 if (!listerr) 956 return; 957 if (preen) 958 printf("%s: ", cdevname()); 959 pfatal("BAD SUPER BLOCK: %s\n", s); 960 } 961 962 /* 963 * Calculate a prototype superblock based on information in the disk label. 964 * When done the cgsblock macro can be calculated and the fs_ncg field 965 * can be used. Do NOT attempt to use other macros without verifying that 966 * their needed information is available! 967 */ 968 static int 969 calcsb(const char *dev, int devfd, struct fs *fs) 970 { 971 struct dkwedge_info dkw; 972 struct disk_geom geo; 973 int i, nspf; 974 975 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 976 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 977 if (dkw.dkw_parent[0] == '\0') { 978 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 979 return (0); 980 } 981 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) && 982 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS)) { 983 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 984 dev, dkw.dkw_ptype); 985 return (0); 986 } 987 if (geo.dg_secsize == 0) { 988 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 989 return 0; 990 } 991 if (geo.dg_secpercyl == 0) { 992 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 993 return 0; 994 } 995 if (sblk.b_un.b_fs->fs_fsize == 0) { 996 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 997 return 0; 998 } 999 if (sblk.b_un.b_fs->fs_fpg == 0) { 1000 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1001 return 0; 1002 } 1003 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1004 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1005 return 0; 1006 } 1007 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1008 nspf = fs->fs_fsize / geo.dg_secsize; 1009 fs->fs_old_nspf = nspf; 1010 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1011 fs->fs_fsbtodb++; 1012 dev_bsize = geo.dg_secsize; 1013 if (fs->fs_magic == FS_UFS2_MAGIC) { 1014 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1015 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1016 fs->fs_old_cgmask = 0xffffffff; 1017 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1018 fs->fs_old_cgmask <<= 1; 1019 if (!POWEROF2(geo.dg_ntracks)) 1020 fs->fs_old_cgmask <<= 1; 1021 fs->fs_old_cgoffset = roundup( 1022 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1023 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1024 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1025 fs->fs_old_cpg); 1026 } 1027 return (1); 1028 } 1029
Indexes created Mon Sep 29 21:09:56 GMT 2025