setup.c revision 1.75
1 /* $NetBSD: setup.c,v 1.75 2005/01/19 17:33:59 xtraeme 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 1.75 2005/01/19 17:33:59 xtraeme 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 #define FSTYPENAMES 46 #include <sys/disklabel.h> 47 #include <sys/file.h> 48 49 #include <ufs/ufs/dinode.h> 50 #include <ufs/ufs/dir.h> 51 #include <ufs/ufs/ufs_bswap.h> 52 #include <ufs/ffs/fs.h> 53 #include <ufs/ffs/ffs_extern.h> 54 55 #include <ctype.h> 56 #include <err.h> 57 #include <errno.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 62 #include "fsck.h" 63 #include "extern.h" 64 #include "fsutil.h" 65 66 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 67 68 static void badsb(int, char *); 69 static int calcsb(const char *, int, struct fs *); 70 static struct disklabel *getdisklabel(const char *, int); 71 static struct partition *getdisklabelpart(const char *, struct disklabel *); 72 static int readsb(int); 73 static int readappleufs(void); 74 75 int16_t sblkpostbl[256]; 76 77 /* 78 * Read in a superblock finding an alternate if necessary. 79 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 80 * is already clean (preen mode only). 81 */ 82 int 83 setup(const char *dev) 84 { 85 long cg, size, asked, i, j; 86 long bmapsize; 87 struct disklabel *lp; 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 95 havesb = 0; 96 fswritefd = -1; 97 doskipclean = skipclean; 98 if (stat(dev, &statb) < 0) { 99 printf("Can't stat %s: %s\n", dev, strerror(errno)); 100 return (0); 101 } 102 if (!forceimage && !S_ISCHR(statb.st_mode)) { 103 pfatal("%s is not a character device", dev); 104 if (reply("CONTINUE") == 0) 105 return (0); 106 } 107 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 108 printf("Can't open %s: %s\n", dev, strerror(errno)); 109 return (0); 110 } 111 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 112 fswritefd = -1; 113 if (preen) 114 pfatal("NO WRITE ACCESS"); 115 printf("** %s (NO WRITE)\n", dev); 116 quiet = 0; 117 } else 118 if (!preen && !quiet) 119 printf("** %s\n", dev); 120 fsmodified = 0; 121 lfdir = 0; 122 initbarea(&sblk); 123 initbarea(&asblk); 124 sblk.b_un.b_buf = malloc(SBLOCKSIZE); 125 sblock = malloc(SBLOCKSIZE); 126 asblk.b_un.b_buf = malloc(SBLOCKSIZE); 127 altsblock = malloc(SBLOCKSIZE); 128 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 129 sblock == NULL || altsblock == NULL) 130 errx(EEXIT, "cannot allocate space for superblock"); 131 if (!forceimage && (lp = getdisklabel(NULL, fsreadfd)) != NULL) 132 dev_bsize = secsize = lp->d_secsize; 133 else 134 dev_bsize = secsize = DEV_BSIZE; 135 /* 136 * Read in the superblock, looking for alternates if necessary 137 */ 138 if (readsb(1) == 0) { 139 if (bflag || preen || forceimage || 140 calcsb(dev, fsreadfd, &proto) == 0) 141 return(0); 142 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 143 return (0); 144 for (cg = 0; cg < proto.fs_ncg; cg++) { 145 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 146 if (readsb(0) != 0) 147 break; 148 } 149 if (cg >= proto.fs_ncg) { 150 printf("%s %s\n%s %s\n%s %s\n", 151 "SEARCH FOR ALTERNATE SUPER-BLOCK", 152 "FAILED. YOU MUST USE THE", 153 "-b OPTION TO fsck_ffs TO SPECIFY THE", 154 "LOCATION OF AN ALTERNATE", 155 "SUPER-BLOCK TO SUPPLY NEEDED", 156 "INFORMATION; SEE fsck_ffs(8)."); 157 return(0); 158 } 159 doskipclean = 0; 160 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 161 } 162 if (debug) 163 printf("clean = %d\n", sblock->fs_clean); 164 if (doswap) 165 doskipclean = 0; 166 if (sblock->fs_clean & FS_ISCLEAN) { 167 if (doskipclean) { 168 if (!quiet) 169 pwarn("%sile system is clean; not checking\n", 170 preen ? "f" : "** F"); 171 return (-1); 172 } 173 if (!preen && !doswap) 174 pwarn("** File system is already clean\n"); 175 } 176 maxfsblock = sblock->fs_size; 177 maxino = sblock->fs_ncg * sblock->fs_ipg; 178 sizepb = sblock->fs_bsize; 179 maxfilesize = sblock->fs_bsize * NDADDR - 1; 180 for (i = 0; i < NIADDR; i++) { 181 sizepb *= NINDIR(sblock); 182 maxfilesize += sizepb; 183 } 184 if ((!is_ufs2 && cvtlevel >= 4) && 185 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 186 if (preen) 187 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 188 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 189 return(0); 190 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 191 /* Disable the postbl tables */ 192 sblock->fs_old_cpc = 0; 193 sblock->fs_old_nrpos = 1; 194 sblock->fs_old_trackskew = 0; 195 /* The other fields have already been updated by 196 * sb_oldfscompat_read 197 */ 198 sbdirty(); 199 } 200 if (!is_ufs2 && cvtlevel == 3 && 201 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 202 if (preen) 203 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 204 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 205 return(0); 206 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 207 sb_oldfscompat_write(sblock, sblock); 208 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 209 /* Leave postbl tables disabled, but blank its superblock region anyway */ 210 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 211 sblock->fs_old_cpc = 0; 212 sblock->fs_old_nrpos = 1; 213 sblock->fs_old_trackskew = 0; 214 memset(&sblock->fs_old_postbl_start, 0xff, 256); 215 sb_oldfscompat_read(sblock, &sblocksave); 216 sbdirty(); 217 } 218 /* 219 * Check and potentially fix certain fields in the super block. 220 */ 221 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 222 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 223 if (reply("SET TO DEFAULT") == 1) { 224 sblock->fs_optim = FS_OPTTIME; 225 sbdirty(); 226 } 227 } 228 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 229 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 230 sblock->fs_minfree); 231 if (reply("SET TO DEFAULT") == 1) { 232 sblock->fs_minfree = 10; 233 sbdirty(); 234 } 235 } 236 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 237 (sblock->fs_old_interleave < 1 || 238 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 239 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 240 sblock->fs_old_interleave); 241 sblock->fs_old_interleave = 1; 242 if (preen) 243 printf(" (FIXED)\n"); 244 if (preen || reply("SET TO DEFAULT") == 1) { 245 sbdirty(); 246 dirty(&asblk); 247 } 248 } 249 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 250 (sblock->fs_old_npsect < sblock->fs_old_nsect || 251 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 252 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 253 sblock->fs_old_npsect); 254 sblock->fs_old_npsect = sblock->fs_old_nsect; 255 if (preen) 256 printf(" (FIXED)\n"); 257 if (preen || reply("SET TO DEFAULT") == 1) { 258 sbdirty(); 259 dirty(&asblk); 260 } 261 } 262 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 263 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 264 sblock->fs_bmask); 265 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 266 if (preen) 267 printf(" (FIXED)\n"); 268 if (preen || reply("FIX") == 1) { 269 sbdirty(); 270 dirty(&asblk); 271 } 272 } 273 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 274 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 275 sblock->fs_fmask); 276 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 277 if (preen) 278 printf(" (FIXED)\n"); 279 if (preen || reply("FIX") == 1) { 280 sbdirty(); 281 dirty(&asblk); 282 } 283 } 284 if (sblock->fs_old_inodefmt >= FS_44INODEFMT) { 285 if (sblock->fs_maxfilesize != maxfilesize) { 286 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 287 (unsigned long long)sblock->fs_maxfilesize); 288 sblock->fs_maxfilesize = maxfilesize; 289 if (preen) 290 printf(" (FIXED)\n"); 291 if (preen || reply("FIX") == 1) { 292 sbdirty(); 293 dirty(&asblk); 294 } 295 } 296 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2) 297 || 298 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1)) 299 { 300 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 301 sblock->fs_maxsymlinklen); 302 sblock->fs_maxsymlinklen = is_ufs2 ? 303 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1; 304 if (preen) 305 printf(" (FIXED)\n"); 306 if (preen || reply("FIX") == 1) { 307 sbdirty(); 308 dirty(&asblk); 309 } 310 } 311 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 312 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 313 (unsigned long long)sblock->fs_qbmask); 314 sblock->fs_qbmask = ~sblock->fs_bmask; 315 if (preen) 316 printf(" (FIXED)\n"); 317 if (preen || reply("FIX") == 1) { 318 sbdirty(); 319 dirty(&asblk); 320 } 321 } 322 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 323 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 324 (unsigned long long)sblock->fs_qfmask); 325 sblock->fs_qfmask = ~sblock->fs_fmask; 326 if (preen) 327 printf(" (FIXED)\n"); 328 if (preen || reply("FIX") == 1) { 329 sbdirty(); 330 dirty(&asblk); 331 } 332 } 333 newinofmt = 1; 334 } else { 335 sblock->fs_qbmask = ~sblock->fs_bmask; 336 sblock->fs_qfmask = ~sblock->fs_fmask; 337 newinofmt = 0; 338 } 339 /* 340 * Convert to new inode format. 341 */ 342 if (!is_ufs2 && cvtlevel >= 2 && 343 sblock->fs_old_inodefmt < FS_44INODEFMT) { 344 if (preen) 345 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 346 else if (!reply("CONVERT TO NEW INODE FORMAT")) 347 return(0); 348 doinglevel2++; 349 sblock->fs_old_inodefmt = FS_44INODEFMT; 350 sblock->fs_maxfilesize = maxfilesize; 351 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; 352 sblock->fs_qbmask = ~sblock->fs_bmask; 353 sblock->fs_qfmask = ~sblock->fs_fmask; 354 sbdirty(); 355 dirty(&asblk); 356 } 357 /* 358 * Convert to new cylinder group format. 359 */ 360 if (!is_ufs2 && cvtlevel >= 1 && 361 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 362 if (preen) 363 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 364 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 365 return(0); 366 doinglevel1++; 367 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 368 sblock->fs_old_nrpos = 8; 369 sblock->fs_old_postbloff = 370 (char *)(&sblock->fs_old_postbl_start) - 371 (char *)(&sblock->fs_firstfield); 372 sblock->fs_old_rotbloff = 373 (char *)(&sblock->fs_magic+1) - 374 (char *)(&sblock->fs_firstfield); 375 sblock->fs_cgsize = 376 fragroundup(sblock, CGSIZE(sblock)); 377 sbdirty(); 378 dirty(&asblk); 379 } 380 if (asblk.b_dirty && !bflag) { 381 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 382 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 383 if (needswap) 384 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 385 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 386 flush(fswritefd, &asblk); 387 } 388 /* 389 * read in the summary info. 390 */ 391 asked = 0; 392 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 393 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 394 size = sblock->fs_cssize - i < sblock->fs_bsize ? 395 sblock->fs_cssize - i : sblock->fs_bsize; 396 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 397 if (bread(fsreadfd, (char *)ccsp, 398 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 399 size) != 0 && !asked) { 400 pfatal("BAD SUMMARY INFORMATION"); 401 if (reply("CONTINUE") == 0) { 402 markclean = 0; 403 exit(EEXIT); 404 } 405 asked++; 406 } 407 if (doswap) { 408 ffs_csum_swap(ccsp, ccsp, size); 409 bwrite(fswritefd, (char *)ccsp, 410 fsbtodb(sblock, 411 sblock->fs_csaddr + j * sblock->fs_frag), 412 size); 413 } 414 if (needswap) 415 ffs_csum_swap(ccsp, ccsp, size); 416 } 417 /* 418 * allocate and initialize the necessary maps 419 */ 420 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 421 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 422 if (blockmap == NULL) { 423 pwarn("cannot alloc %u bytes for blockmap\n", 424 (unsigned)bmapsize); 425 goto badsblabel; 426 } 427 inostathead = calloc((unsigned)(sblock->fs_ncg), 428 sizeof(struct inostatlist)); 429 if (inostathead == NULL) { 430 pwarn("cannot alloc %u bytes for inostathead\n", 431 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 432 goto badsblabel; 433 } 434 /* 435 * cs_ndir may be inaccurate, particularly if we're using the -b 436 * option, so set a minimum to prevent bogus subdirectory reconnects 437 * and really inefficient directory scans. 438 * Also set a maximum in case the value is too large. 439 */ 440 numdirs = sblock->fs_cstotal.cs_ndir; 441 if (numdirs < 1024) 442 numdirs = 1024; 443 if (numdirs > maxino + 1) 444 numdirs = maxino + 1; 445 dirhash = numdirs; 446 inplast = 0; 447 listmax = numdirs + 10; 448 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 449 sizeof(struct inoinfo *)); 450 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 451 sizeof(struct inoinfo *)); 452 if (inpsort == NULL || inphead == NULL) { 453 pwarn("cannot alloc %u bytes for inphead\n", 454 (unsigned)(numdirs * sizeof(struct inoinfo *))); 455 goto badsblabel; 456 } 457 cgrp = malloc(sblock->fs_cgsize); 458 if (cgrp == NULL) { 459 pwarn("cannot alloc %u bytes for cylinder group\n", 460 sblock->fs_cgsize); 461 goto badsblabel; 462 } 463 bufinit(); 464 if (sblock->fs_flags & FS_DOSOFTDEP) 465 usedsoftdep = 1; 466 else 467 usedsoftdep = 0; 468 469 { 470 struct partition *pp = 0; 471 if (!forceimage && lp) 472 pp = getdisklabelpart(dev,lp); 473 if (pp && (pp->p_fstype == FS_APPLEUFS)) { 474 isappleufs = 1; 475 } 476 } 477 if (readappleufs()) { 478 isappleufs = 1; 479 } 480 481 dirblksiz = DIRBLKSIZ; 482 if (isappleufs) 483 dirblksiz = APPLEUFS_DIRBLKSIZ; 484 485 if (debug) 486 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 487 488 return (1); 489 490 badsblabel: 491 markclean=0; 492 ckfini(); 493 return (0); 494 } 495 496 static int 497 readappleufs(void) 498 { 499 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 500 struct appleufslabel *appleufs; 501 int i; 502 503 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 504 * being block aligned (CD's?) 505 */ 506 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 507 (long)APPLEUFS_LABEL_SIZE) != 0) 508 return 0; 509 appleufsblk.b_bno = label; 510 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 511 512 appleufs = appleufsblk.b_un.b_appleufs; 513 514 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 515 if (!isappleufs) { 516 return 0; 517 } else { 518 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 519 if (reply("FIX") == 0) { 520 return 1; 521 } 522 ffs_appleufs_set(appleufs, NULL, -1, 0); 523 appleufsdirty(); 524 } 525 } 526 527 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 528 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 529 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 530 if (preen) { 531 printf(" (CORRECTED)\n"); 532 } 533 if (preen || reply("CORRECT")) { 534 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 535 appleufsdirty(); 536 } 537 } 538 539 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 540 pwarn("APPLE UFS LABEL NAME TOO LONG"); 541 if (preen) { 542 printf(" (TRUNCATED)\n"); 543 } 544 if (preen || reply("TRUNCATE")) { 545 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 546 appleufsdirty(); 547 } 548 } 549 550 if (ntohs(appleufs->ul_namelen) == 0) { 551 pwarn("MISSING APPLE UFS LABEL NAME"); 552 if (preen) { 553 printf(" (FIXED)\n"); 554 } 555 if (preen || reply("FIX")) { 556 ffs_appleufs_set(appleufs, NULL, -1, 0); 557 appleufsdirty(); 558 } 559 } 560 561 /* Scan name for first illegal character */ 562 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 563 if ((appleufs->ul_name[i] == '\0') || 564 (appleufs->ul_name[i] == ':') || 565 (appleufs->ul_name[i] == '/')) { 566 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 567 if (preen) { 568 printf(" (TRUNCATED)\n"); 569 } 570 if (preen || reply("TRUNCATE")) { 571 appleufs->ul_namelen = i+1; 572 appleufsdirty(); 573 } 574 break; 575 } 576 } 577 578 /* Check the checksum last, because if anything else was wrong, 579 * then the checksum gets reset anyway. 580 */ 581 appleufs->ul_checksum = 0; 582 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 583 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 584 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 585 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 586 if (preen) { 587 printf(" (CORRECTED)\n"); 588 } 589 if (preen || reply("CORRECT")) { 590 appleufsdirty(); 591 } else { 592 /* put the incorrect checksum back in place */ 593 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 594 } 595 } 596 return 1; 597 } 598 599 /* 600 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 601 */ 602 static int 603 detect_byteorder(struct fs *fs, int sblockoff) 604 { 605 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 606 fs->fs_magic == bswap32(FS_UFS1_MAGIC))) 607 /* Likely to be the first alternate of a fs with 64k blocks */ 608 return -1; 609 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 610 if (endian == 0 || BYTE_ORDER == endian) { 611 needswap = 0; 612 doswap = do_blkswap = do_dirswap = 0; 613 } else { 614 needswap = 1; 615 doswap = do_blkswap = do_dirswap = 1; 616 } 617 return 0; 618 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) || 619 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 620 if (endian == 0 || BYTE_ORDER != endian) { 621 needswap = 1; 622 doswap = do_blkswap = do_dirswap = 0; 623 } else { 624 needswap = 0; 625 doswap = do_blkswap = do_dirswap = 1; 626 } 627 return 0; 628 } 629 return -1; 630 } 631 632 /* 633 * Possible superblock locations ordered from most to least likely. 634 */ 635 static off_t sblock_try[] = SBLOCKSEARCH; 636 637 /* 638 * Read in the super block and its summary info. 639 */ 640 static int 641 readsb(int listerr) 642 { 643 daddr_t super; 644 struct fs *fs; 645 int i; 646 647 if (bflag) { 648 super = bflag; 649 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 650 (long)SBLOCKSIZE) != 0) 651 return (0); 652 fs = sblk.b_un.b_fs; 653 if (detect_byteorder(fs, -1) < 0) { 654 badsb(listerr, "MAGIC NUMBER WRONG"); 655 return (0); 656 } 657 } else { 658 for (i = 0; sblock_try[i] != -1; i++) { 659 super = sblock_try[i] / dev_bsize; 660 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 661 super, (long)SBLOCKSIZE) != 0) 662 continue; 663 fs = sblk.b_un.b_fs; 664 if (detect_byteorder(fs, sblock_try[i]) == 0) 665 break; 666 } 667 if (sblock_try[i] == -1) { 668 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 669 return (0); 670 } 671 } 672 if (doswap) { 673 if (preen) 674 errx(EEXIT, "incompatible options -B and -p"); 675 if (nflag) 676 errx(EEXIT, "incompatible options -B and -n"); 677 if (endian == LITTLE_ENDIAN) { 678 if (!reply("CONVERT TO LITTLE ENDIAN")) 679 return 0; 680 } else if (endian == BIG_ENDIAN) { 681 if (!reply("CONVERT TO BIG ENDIAN")) 682 return 0; 683 } else 684 pfatal("INTERNAL ERROR: unknown endian"); 685 } 686 if (needswap) 687 pwarn("** Swapped byte order\n"); 688 /* swap SB byte order if asked */ 689 if (doswap) 690 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 691 692 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 693 if (needswap) 694 ffs_sb_swap(sblk.b_un.b_fs, sblock); 695 696 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 697 698 /* 699 * run a few consistency checks of the super block 700 */ 701 if (sblock->fs_sbsize > SBLOCKSIZE) 702 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 703 /* 704 * Compute block size that the filesystem is based on, 705 * according to fsbtodb, and adjust superblock block number 706 * so we can tell if this is an alternate later. 707 */ 708 super *= dev_bsize; 709 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 710 sblk.b_bno = super / dev_bsize; 711 sblk.b_size = SBLOCKSIZE; 712 if (bflag) 713 goto out; 714 /* 715 * Set all possible fields that could differ, then do check 716 * of whole super block against an alternate super block-> 717 * When an alternate super-block is specified this check is skipped. 718 */ 719 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 720 if (asblk.b_errs) 721 return (0); 722 /* swap SB byte order if asked */ 723 if (doswap) 724 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 725 726 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 727 if (needswap) 728 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 729 if (cmpsblks(sblock, altsblock)) { 730 if (debug) { 731 uint32_t *nlp, *olp, *endlp; 732 733 printf("superblock mismatches\n"); 734 nlp = (uint32_t *)altsblock; 735 olp = (uint32_t *)sblock; 736 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 737 for ( ; olp < endlp; olp++, nlp++) { 738 if (*olp == *nlp) 739 continue; 740 printf("offset %#x, original 0x%08x, alternate " 741 "0x%08x\n", 742 (int)((uint8_t *)olp-(uint8_t *)sblock), 743 *olp, *nlp); 744 } 745 } 746 badsb(listerr, 747 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 748 return (0); 749 } 750 out: 751 752 sb_oldfscompat_read(sblock, &sblocksave); 753 754 /* Now we know the SB is valid, we can write it back if needed */ 755 if (doswap) { 756 sbdirty(); 757 dirty(&asblk); 758 } 759 havesb = 1; 760 return (1); 761 } 762 763 int 764 cmpsblks(const struct fs *sb, struct fs *asb) 765 { 766 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 767 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 768 return cmpsblks42(sb, asb); 769 else 770 return cmpsblks44(sb, asb); 771 } 772 if (asb->fs_sblkno != sb->fs_sblkno || 773 asb->fs_cblkno != sb->fs_cblkno || 774 asb->fs_iblkno != sb->fs_iblkno || 775 asb->fs_dblkno != sb->fs_dblkno || 776 asb->fs_ncg != sb->fs_ncg || 777 asb->fs_bsize != sb->fs_bsize || 778 asb->fs_fsize != sb->fs_fsize || 779 asb->fs_frag != sb->fs_frag || 780 asb->fs_bmask != sb->fs_bmask || 781 asb->fs_fmask != sb->fs_fmask || 782 asb->fs_bshift != sb->fs_bshift || 783 asb->fs_fshift != sb->fs_fshift || 784 asb->fs_fragshift != sb->fs_fragshift || 785 asb->fs_fsbtodb != sb->fs_fsbtodb || 786 asb->fs_sbsize != sb->fs_sbsize || 787 asb->fs_nindir != sb->fs_nindir || 788 asb->fs_inopb != sb->fs_inopb || 789 asb->fs_cssize != sb->fs_cssize || 790 asb->fs_ipg != sb->fs_ipg || 791 asb->fs_fpg != sb->fs_fpg || 792 asb->fs_magic != sb->fs_magic) 793 return 1; 794 return 0; 795 } 796 797 /* BSD 4.2 performed the following superblock comparison 798 * It should correspond to FS_42POSTBLFMT 799 * (although note that in 4.2, the fs_old_postblformat 800 * field didn't exist and the corresponding bits are 801 * located near the end of the postbl itself, where they 802 * are not likely to be used.) 803 */ 804 int 805 cmpsblks42(const struct fs *sb, struct fs *asb) 806 { 807 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 808 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 809 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 810 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 811 asb->fs_cgrotor = sb->fs_cgrotor; 812 asb->fs_fmod = sb->fs_fmod; 813 asb->fs_clean = sb->fs_clean; 814 asb->fs_ronly = sb->fs_ronly; 815 asb->fs_old_flags = sb->fs_old_flags; 816 asb->fs_maxcontig = sb->fs_maxcontig; 817 asb->fs_minfree = sb->fs_minfree; 818 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 819 asb->fs_maxbpg = sb->fs_maxbpg; 820 821 /* The former fs_csp, totaling 128 bytes */ 822 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 823 asb->fs_contigdirs = sb->fs_contigdirs; 824 asb->fs_csp = sb->fs_csp; 825 asb->fs_maxcluster = sb->fs_maxcluster; 826 asb->fs_active = sb->fs_active; 827 828 /* The former fs_fsmnt, totaling 512 bytes */ 829 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 830 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 831 832 return memcmp(sb, asb, sb->fs_sbsize); 833 } 834 835 /* BSD 4.4 performed the following superblock comparison 836 * This was used in NetBSD through 1.6.1 837 * 838 * Note that this implementation is destructive to asb. 839 */ 840 int 841 cmpsblks44(const struct fs *sb, struct fs *asb) 842 { 843 /* 844 * "Copy fields which we don't care if they're different in the 845 * alternate superblocks, as they're either likely to be 846 * different because they're per-cylinder-group specific, or 847 * because they're transient details which are only maintained 848 * in the primary superblock." 849 */ 850 asb->fs_firstfield = sb->fs_firstfield; 851 asb->fs_unused_1 = sb->fs_unused_1; 852 asb->fs_old_time = sb->fs_old_time; 853 asb->fs_old_cstotal = sb->fs_old_cstotal; 854 asb->fs_cgrotor = sb->fs_cgrotor; 855 asb->fs_fmod = sb->fs_fmod; 856 asb->fs_clean = sb->fs_clean; 857 asb->fs_ronly = sb->fs_ronly; 858 asb->fs_old_flags = sb->fs_old_flags; 859 asb->fs_maxcontig = sb->fs_maxcontig; 860 asb->fs_minfree = sb->fs_minfree; 861 asb->fs_optim = sb->fs_optim; 862 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 863 asb->fs_maxbpg = sb->fs_maxbpg; 864 865 /* The former fs_csp and fs_maxcluster, 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 /* The former fs_sparecon, totaling 200 bytes */ 877 memmove(asb->fs_snapinum, 878 sb->fs_snapinum, sizeof sb->fs_snapinum); 879 asb->fs_avgfilesize = sb->fs_avgfilesize; 880 asb->fs_avgfpdir = sb->fs_avgfpdir; 881 asb->fs_save_cgsize = sb->fs_save_cgsize; 882 memmove(asb->fs_sparecon32, 883 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 884 asb->fs_flags = sb->fs_flags; 885 886 /* Original comment: 887 * "The following should not have to be copied, but need to be." 888 */ 889 asb->fs_fsbtodb = sb->fs_fsbtodb; 890 asb->fs_old_interleave = sb->fs_old_interleave; 891 asb->fs_old_npsect = sb->fs_old_npsect; 892 asb->fs_old_nrpos = sb->fs_old_nrpos; 893 asb->fs_state = sb->fs_state; 894 asb->fs_qbmask = sb->fs_qbmask; 895 asb->fs_qfmask = sb->fs_qfmask; 896 asb->fs_state = sb->fs_state; 897 asb->fs_maxfilesize = sb->fs_maxfilesize; 898 899 /* 900 * "Compare the superblocks, effectively checking every other 901 * field to see if they differ." 902 */ 903 return memcmp(sb, asb, sb->fs_sbsize); 904 } 905 906 907 static void 908 badsb(int listerr, char *s) 909 { 910 911 if (!listerr) 912 return; 913 if (preen) 914 printf("%s: ", cdevname()); 915 pfatal("BAD SUPER BLOCK: %s\n", s); 916 } 917 918 /* 919 * Calculate a prototype superblock based on information in the disk label. 920 * When done the cgsblock macro can be calculated and the fs_ncg field 921 * can be used. Do NOT attempt to use other macros without verifying that 922 * their needed information is available! 923 */ 924 static int 925 calcsb(const char *dev, int devfd, struct fs *fs) 926 { 927 struct disklabel *lp; 928 struct partition *pp; 929 int i, nspf; 930 931 lp = getdisklabel(dev, devfd); 932 pp = getdisklabelpart(dev,lp); 933 if (pp == 0) { 934 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 935 return (0); 936 } 937 if ((pp->p_fstype != FS_BSDFFS) && (pp->p_fstype != FS_APPLEUFS)) { 938 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 939 dev, pp->p_fstype < FSMAXTYPES ? 940 fstypenames[pp->p_fstype] : "unknown"); 941 return (0); 942 } 943 /* avoid divide by 0 */ 944 if (pp->p_fsize == 0 || pp->p_frag == 0 || pp->p_cpg == 0) { 945 pfatal("%s: LABEL DOES NOT CONTAIN FILE SYSTEM PARAMETERS\n", dev); 946 return (0); 947 } 948 memset(fs, 0, sizeof(struct fs)); 949 fs->fs_fsize = pp->p_fsize; 950 fs->fs_frag = pp->p_frag; 951 fs->fs_size = pp->p_size; 952 fs->fs_sblkno = roundup( 953 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 954 fs->fs_frag); 955 nspf = fs->fs_fsize / lp->d_secsize; 956 fs->fs_old_nspf = nspf; 957 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 958 fs->fs_fsbtodb++; 959 dev_bsize = lp->d_secsize; 960 if (fs->fs_magic == FS_UFS2_MAGIC) { 961 fs->fs_fpg = pp->p_cpg; 962 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 963 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 964 fs->fs_old_cpg = pp->p_cpg; 965 fs->fs_old_cgmask = 0xffffffff; 966 for (i = lp->d_ntracks; i > 1; i >>= 1) 967 fs->fs_old_cgmask <<= 1; 968 if (!POWEROF2(lp->d_ntracks)) 969 fs->fs_old_cgmask <<= 1; 970 fs->fs_old_cgoffset = roundup( 971 howmany(lp->d_nsectors, nspf), fs->fs_frag); 972 fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf; 973 fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl, 974 fs->fs_old_cpg); 975 } 976 return (1); 977 } 978 979 static struct disklabel * 980 getdisklabel(const char *s, int fd) 981 { 982 static struct disklabel lab; 983 984 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 985 if (s == NULL) 986 return ((struct disklabel *)NULL); 987 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 988 errx(EEXIT, "%s: can't read disk label", s); 989 } 990 return (&lab); 991 } 992 993 static struct partition * 994 getdisklabelpart(const char *dev, struct disklabel *lp) 995 { 996 char *cp; 997 int c; 998 999 cp = strchr(dev, '\0'); 1000 if (cp == dev) 1001 return NULL; 1002 1003 c = (unsigned char)cp[-1]; 1004 if (isdigit(c)) 1005 /* eg "wd0", return info for first partition */ 1006 return &lp->d_partitions[0]; 1007 1008 if (c >= 'a' && c <= 'p') 1009 /* eg "wd0f", return info for specified partition */ 1010 return &lp->d_partitions[c - 'a']; 1011 return NULL; 1012 } 1013 1014
Indexes created Tue Sep 23 23:09:58 GMT 2025