setup.c revision 1.55
1 /* $NetBSD: setup.c,v 1.55 2002/11/05 05:18:50 dbj 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 40 #else 41 __RCSID("$NetBSD: setup.c,v 1.55 2002/11/05 05:18:50 dbj Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #include <sys/stat.h> 48 #include <sys/ioctl.h> 49 #define FSTYPENAMES 50 #include <sys/disklabel.h> 51 #include <sys/file.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ufs/dir.h> 55 #include <ufs/ufs/ufs_bswap.h> 56 #include <ufs/ffs/fs.h> 57 #include <ufs/ffs/ffs_extern.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 66 #include "fsck.h" 67 #include "extern.h" 68 #include "fsutil.h" 69 70 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 71 72 static void badsb __P((int, char *)); 73 static int calcsb __P((const char *, int, struct fs *)); 74 static struct disklabel *getdisklabel __P((const char *, int)); 75 static struct partition *getdisklabelpart __P((const char *, struct disklabel *)); 76 static int readsb __P((int)); 77 static int readappleufs __P((void)); 78 79 /* 80 * Read in a superblock finding an alternate if necessary. 81 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 82 * is already clean (preen mode only). 83 */ 84 int 85 setup(dev) 86 const char *dev; 87 { 88 long cg, size, asked, i, j; 89 long bmapsize; 90 struct disklabel *lp; 91 off_t sizepb; 92 struct stat statb; 93 struct fs proto; 94 int doskipclean; 95 u_int64_t maxfilesize; 96 struct csum *ccsp; 97 98 havesb = 0; 99 fswritefd = -1; 100 doskipclean = skipclean; 101 if (stat(dev, &statb) < 0) { 102 printf("Can't stat %s: %s\n", dev, strerror(errno)); 103 return (0); 104 } 105 if (!forceimage && !S_ISCHR(statb.st_mode)) { 106 pfatal("%s is not a character device", dev); 107 if (reply("CONTINUE") == 0) 108 return (0); 109 } 110 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 111 printf("Can't open %s: %s\n", dev, strerror(errno)); 112 return (0); 113 } 114 if (preen == 0) 115 printf("** %s", dev); 116 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 117 fswritefd = -1; 118 if (preen) 119 pfatal("NO WRITE ACCESS"); 120 printf(" (NO WRITE)"); 121 } 122 if (preen == 0) 123 printf("\n"); 124 fsmodified = 0; 125 lfdir = 0; 126 initbarea(&sblk); 127 initbarea(&asblk); 128 sblk.b_un.b_buf = malloc(SBSIZE); 129 sblock = malloc(SBSIZE); 130 asblk.b_un.b_buf = malloc(SBSIZE); 131 altsblock = malloc(SBSIZE); 132 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 133 sblock == NULL || altsblock == NULL) 134 errx(EEXIT, "cannot allocate space for superblock"); 135 if (!forceimage && (lp = getdisklabel(NULL, fsreadfd)) != NULL) 136 dev_bsize = secsize = lp->d_secsize; 137 else 138 dev_bsize = secsize = DEV_BSIZE; 139 /* 140 * Read in the superblock, looking for alternates if necessary 141 */ 142 if (readsb(1) == 0) { 143 if (bflag || preen || forceimage || 144 calcsb(dev, fsreadfd, &proto) == 0) 145 return(0); 146 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 147 return (0); 148 for (cg = 0; cg < proto.fs_ncg; cg++) { 149 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 150 if (readsb(0) != 0) 151 break; 152 } 153 if (cg >= proto.fs_ncg) { 154 printf("%s %s\n%s %s\n%s %s\n", 155 "SEARCH FOR ALTERNATE SUPER-BLOCK", 156 "FAILED. YOU MUST USE THE", 157 "-b OPTION TO fsck_ffs TO SPECIFY THE", 158 "LOCATION OF AN ALTERNATE", 159 "SUPER-BLOCK TO SUPPLY NEEDED", 160 "INFORMATION; SEE fsck_ffs(8)."); 161 return(0); 162 } 163 doskipclean = 0; 164 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 165 } 166 if (debug) 167 printf("clean = %d\n", sblock->fs_clean); 168 if (doswap) 169 doskipclean = 0; 170 if (sblock->fs_clean & FS_ISCLEAN) { 171 if (doskipclean) { 172 pwarn("%sile system is clean; not checking\n", 173 preen ? "f" : "** F"); 174 return (-1); 175 } 176 if (!preen && !doswap) 177 pwarn("** File system is already clean\n"); 178 } 179 maxfsblock = sblock->fs_size; 180 maxino = sblock->fs_ncg * sblock->fs_ipg; 181 sizepb = sblock->fs_bsize; 182 maxfilesize = sblock->fs_bsize * NDADDR - 1; 183 for (i = 0; i < NIADDR; i++) { 184 sizepb *= NINDIR(sblock); 185 maxfilesize += sizepb; 186 } 187 /* 188 * Check and potentially fix certain fields in the super block. 189 */ 190 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 191 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 192 if (reply("SET TO DEFAULT") == 1) { 193 sblock->fs_optim = FS_OPTTIME; 194 sbdirty(); 195 } 196 } 197 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 198 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 199 sblock->fs_minfree); 200 if (reply("SET TO DEFAULT") == 1) { 201 sblock->fs_minfree = 10; 202 sbdirty(); 203 } 204 } 205 if (sblock->fs_postblformat != FS_42POSTBLFMT && 206 (sblock->fs_interleave < 1 || 207 sblock->fs_interleave > sblock->fs_nsect)) { 208 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 209 sblock->fs_interleave); 210 sblock->fs_interleave = 1; 211 if (preen) 212 printf(" (FIXED)\n"); 213 if (preen || reply("SET TO DEFAULT") == 1) { 214 sbdirty(); 215 dirty(&asblk); 216 } 217 } 218 if (sblock->fs_postblformat != FS_42POSTBLFMT && 219 (sblock->fs_npsect < sblock->fs_nsect || 220 sblock->fs_npsect > sblock->fs_nsect*2)) { 221 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 222 sblock->fs_npsect); 223 sblock->fs_npsect = sblock->fs_nsect; 224 if (preen) 225 printf(" (FIXED)\n"); 226 if (preen || reply("SET TO DEFAULT") == 1) { 227 sbdirty(); 228 dirty(&asblk); 229 } 230 } 231 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 232 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 233 sblock->fs_bmask); 234 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 235 if (preen) 236 printf(" (FIXED)\n"); 237 if (preen || reply("FIX") == 1) { 238 sbdirty(); 239 dirty(&asblk); 240 } 241 } 242 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 243 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 244 sblock->fs_fmask); 245 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 246 if (preen) 247 printf(" (FIXED)\n"); 248 if (preen || reply("FIX") == 1) { 249 sbdirty(); 250 dirty(&asblk); 251 } 252 } 253 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 254 if (sblock->fs_maxfilesize != maxfilesize) { 255 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 256 (unsigned long long)sblock->fs_maxfilesize); 257 sblock->fs_maxfilesize = maxfilesize; 258 if (preen) 259 printf(" (FIXED)\n"); 260 if (preen || reply("FIX") == 1) { 261 sbdirty(); 262 dirty(&asblk); 263 } 264 } 265 if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { 266 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 267 sblock->fs_maxsymlinklen); 268 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 269 if (preen) 270 printf(" (FIXED)\n"); 271 if (preen || reply("FIX") == 1) { 272 sbdirty(); 273 dirty(&asblk); 274 } 275 } 276 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 277 pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK", 278 (unsigned long long)sblock->fs_qbmask); 279 sblock->fs_qbmask = ~sblock->fs_bmask; 280 if (preen) 281 printf(" (FIXED)\n"); 282 if (preen || reply("FIX") == 1) { 283 sbdirty(); 284 dirty(&asblk); 285 } 286 } 287 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 288 pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK", 289 (unsigned long long)sblock->fs_qfmask); 290 sblock->fs_qfmask = ~sblock->fs_fmask; 291 if (preen) 292 printf(" (FIXED)\n"); 293 if (preen || reply("FIX") == 1) { 294 sbdirty(); 295 dirty(&asblk); 296 } 297 } 298 newinofmt = 1; 299 } else { 300 sblock->fs_qbmask = ~sblock->fs_bmask; 301 sblock->fs_qfmask = ~sblock->fs_fmask; 302 newinofmt = 0; 303 } 304 /* 305 * Convert to new inode format. 306 */ 307 if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { 308 if (preen) 309 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 310 else if (!reply("CONVERT TO NEW INODE FORMAT")) 311 return(0); 312 doinglevel2++; 313 sblock->fs_inodefmt = FS_44INODEFMT; 314 sblock->fs_maxfilesize = maxfilesize; 315 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 316 sblock->fs_qbmask = ~sblock->fs_bmask; 317 sblock->fs_qfmask = ~sblock->fs_fmask; 318 sbdirty(); 319 dirty(&asblk); 320 } 321 /* 322 * Convert to new cylinder group format. 323 */ 324 if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { 325 if (preen) 326 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 327 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 328 return(0); 329 doinglevel1++; 330 sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; 331 sblock->fs_nrpos = 8; 332 if (sblock->fs_npsect < sblock->fs_nsect) 333 sblock->fs_npsect = sblock->fs_nsect; 334 if (sblock->fs_interleave < 1) 335 sblock->fs_interleave = 1; 336 sblock->fs_postbloff = 337 (char *)(&sblock->fs_opostbl[0][0]) - 338 (char *)(&sblock->fs_firstfield); 339 sblock->fs_rotbloff = &sblock->fs_space[0] - 340 (u_char *)(&sblock->fs_firstfield); 341 sblock->fs_cgsize = 342 fragroundup(sblock, CGSIZE(sblock)); 343 sbdirty(); 344 dirty(&asblk); 345 } 346 if (asblk.b_dirty && !bflag) { 347 memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); 348 if (needswap) 349 ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs); 350 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 351 flush(fswritefd, &asblk); 352 } 353 /* 354 * read in the summary info. 355 */ 356 asked = 0; 357 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 358 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 359 size = sblock->fs_cssize - i < sblock->fs_bsize ? 360 sblock->fs_cssize - i : sblock->fs_bsize; 361 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 362 if (bread(fsreadfd, (char *)ccsp, 363 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 364 size) != 0 && !asked) { 365 pfatal("BAD SUMMARY INFORMATION"); 366 if (reply("CONTINUE") == 0) { 367 markclean = 0; 368 exit(EEXIT); 369 } 370 asked++; 371 } 372 if (doswap) { 373 ffs_csum_swap(ccsp, ccsp, size); 374 bwrite(fswritefd, (char *)ccsp, 375 fsbtodb(sblock, 376 sblock->fs_csaddr + j * sblock->fs_frag), 377 size); 378 } 379 if (needswap) 380 ffs_csum_swap(ccsp, ccsp, size); 381 } 382 /* 383 * allocate and initialize the necessary maps 384 */ 385 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 386 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 387 if (blockmap == NULL) { 388 printf("cannot alloc %u bytes for blockmap\n", 389 (unsigned)bmapsize); 390 goto badsblabel; 391 } 392 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 393 if (statemap == NULL) { 394 printf("cannot alloc %u bytes for statemap\n", 395 (unsigned)(maxino + 1)); 396 goto badsblabel; 397 } 398 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 399 if (typemap == NULL) { 400 printf("cannot alloc %u bytes for typemap\n", 401 (unsigned)(maxino + 1)); 402 goto badsblabel; 403 } 404 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 405 if (lncntp == NULL) { 406 printf("cannot alloc %u bytes for lncntp\n", 407 (unsigned)((maxino + 1) * sizeof(int16_t))); 408 goto badsblabel; 409 } 410 /* 411 * cs_ndir may be inaccurate, particularly if we're using the -b 412 * option, so set a minimum to prevent bogus subdirectory reconnects 413 * and really inefficient directory scans. 414 * Also set a maximum in case the value is too large. 415 */ 416 numdirs = sblock->fs_cstotal.cs_ndir; 417 if (numdirs < 1024) 418 numdirs = 1024; 419 if (numdirs > maxino + 1) 420 numdirs = maxino + 1; 421 inplast = 0; 422 listmax = numdirs + 10; 423 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 424 sizeof(struct inoinfo *)); 425 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 426 sizeof(struct inoinfo *)); 427 if (inpsort == NULL || inphead == NULL) { 428 printf("cannot alloc %u bytes for inphead\n", 429 (unsigned)(numdirs * sizeof(struct inoinfo *))); 430 goto badsblabel; 431 } 432 cgrp = malloc(sblock->fs_cgsize); 433 if (cgrp == NULL) { 434 printf("cannot alloc %u bytes for cylinder group\n", 435 sblock->fs_cgsize); 436 goto badsblabel; 437 } 438 bufinit(); 439 if (sblock->fs_flags & FS_DOSOFTDEP) 440 usedsoftdep = 1; 441 else 442 usedsoftdep = 0; 443 444 { 445 struct partition *pp = 0; 446 if (!forceimage && lp) 447 pp = getdisklabelpart(dev,lp); 448 if (pp && (pp->p_fstype == FS_APPLEUFS)) { 449 isappleufs = 1; 450 } 451 } 452 if (readappleufs()) { 453 isappleufs = 1; 454 } 455 456 dirblksiz = DIRBLKSIZ; 457 if (isappleufs) 458 dirblksiz = APPLEUFS_DIRBLKSIZ; 459 460 if (debug) 461 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 462 463 return (1); 464 465 badsblabel: 466 markclean=0; 467 ckfini(); 468 return (0); 469 } 470 471 static int 472 readappleufs() 473 { 474 ufs_daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 475 struct appleufslabel *appleufs; 476 int i; 477 478 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 479 * being block aligned (CD's?) 480 */ 481 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, (long)APPLEUFS_LABEL_SIZE) != 0) 482 return 0; 483 appleufsblk.b_bno = label; 484 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 485 486 appleufs = appleufsblk.b_un.b_appleufs; 487 488 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 489 if (!isappleufs) { 490 return 0; 491 } else { 492 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 493 if (reply("FIX") == 0) { 494 return 1; 495 } 496 ffs_appleufs_set(appleufs,NULL,-1); 497 appleufsdirty(); 498 } 499 } 500 501 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 502 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 503 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 504 if (preen) { 505 printf(" (CORRECTED)\n"); 506 } 507 if (preen || reply("CORRECT")) { 508 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 509 appleufsdirty(); 510 } 511 } 512 513 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 514 pwarn("APPLE UFS LABEL NAME TOO LONG"); 515 if (preen) { 516 printf(" (TRUNCATED)\n"); 517 } 518 if (preen || reply("TRUNCATE")) { 519 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 520 appleufsdirty(); 521 } 522 } 523 524 if (ntohs(appleufs->ul_namelen) == 0) { 525 pwarn("MISSING APPLE UFS LABEL NAME"); 526 if (preen) { 527 printf(" (FIXED)\n"); 528 } 529 if (preen || reply("FIX")) { 530 ffs_appleufs_set(appleufs,NULL,-1); 531 appleufsdirty(); 532 } 533 } 534 535 /* Scan name for first illegal character */ 536 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 537 if ((appleufs->ul_name[i] == '\0') || 538 (appleufs->ul_name[i] == ':') || 539 (appleufs->ul_name[i] == '/')) { 540 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 541 if (preen) { 542 printf(" (TRUNCATED)\n"); 543 } 544 if (preen || reply("TRUNCATE")) { 545 appleufs->ul_namelen = i+1; 546 appleufsdirty(); 547 } 548 break; 549 } 550 } 551 552 /* Check the checksum last, because if anything else was wrong, 553 * then the checksum gets reset anyway. 554 */ 555 appleufs->ul_checksum = 0; 556 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 557 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 558 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 559 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 560 if (preen) { 561 printf(" (CORRECTED)\n"); 562 } 563 if (preen || reply("CORRECT")) { 564 appleufsdirty(); 565 } else { 566 /* put the incorrect checksum back in place */ 567 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 568 } 569 } 570 return 1; 571 } 572 573 /* 574 * Read in the super block and its summary info. 575 */ 576 static int 577 readsb(listerr) 578 int listerr; 579 { 580 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 581 struct fs *fs; 582 583 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 584 return (0); 585 sblk.b_bno = super; 586 sblk.b_size = SBSIZE; 587 588 fs = sblk.b_un.b_fs; 589 /* auto detect byte order */ 590 if( fs->fs_magic == FS_MAGIC) { 591 if (endian == 0 || BYTE_ORDER == endian) { 592 needswap = 0; 593 doswap = do_blkswap = do_dirswap = 0; 594 } else { 595 needswap = 1; 596 doswap = do_blkswap = do_dirswap = 1; 597 } 598 } else if (fs->fs_magic == bswap32(FS_MAGIC)) { 599 if (endian == 0 || BYTE_ORDER != endian) { 600 needswap = 1; 601 doswap = do_blkswap = do_dirswap = 0; 602 } else { 603 needswap = 0; 604 doswap = do_blkswap = do_dirswap = 1; 605 } 606 } else { 607 badsb(listerr, "MAGIC NUMBER WRONG"); 608 return (0); 609 } 610 if (doswap) { 611 if (preen) 612 errx(EEXIT, "incompatible options -B and -p"); 613 if (nflag) 614 errx(EEXIT, "incompatible options -B and -n"); 615 if (endian == LITTLE_ENDIAN) { 616 if (!reply("CONVERT TO LITTLE ENDIAN")) 617 return 0; 618 } else if (endian == BIG_ENDIAN) { 619 if (!reply("CONVERT TO BIG ENDIAN")) 620 return 0; 621 } else 622 pfatal("INTERNAL ERROR: unknown endian"); 623 } 624 if (needswap) 625 printf("** Swapped byte order\n"); 626 /* swap SB byte order if asked */ 627 if (doswap) 628 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 629 630 memmove(sblock, sblk.b_un.b_fs, SBSIZE); 631 if (needswap) 632 ffs_sb_swap(sblk.b_un.b_fs, sblock); 633 634 /* 635 * run a few consistency checks of the super block 636 */ 637 if (sblock->fs_ncg < 1) 638 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 639 if (sblock->fs_cpg < 1) 640 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 641 if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || 642 (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) 643 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 644 if (sblock->fs_sbsize > SBSIZE) 645 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 646 /* 647 * Compute block size that the filesystem is based on, 648 * according to fsbtodb, and adjust superblock block number 649 * so we can tell if this is an alternate later. 650 */ 651 super *= dev_bsize; 652 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 653 sblk.b_bno = super / dev_bsize; 654 655 if (bflag) { 656 havesb = 1; 657 return (1); 658 } 659 /* 660 * Set all possible fields that could differ, then do check 661 * of whole super block against an alternate super block. 662 * When an alternate super-block is specified this check is skipped. 663 */ 664 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 665 if (asblk.b_errs) 666 return (0); 667 /* swap SB byte order if asked */ 668 if (doswap) 669 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 670 671 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 672 if (needswap) 673 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 674 if (cmpsblks(sblock, altsblock)) { 675 if (debug) { 676 long *nlp, *olp, *endlp; 677 678 printf("superblock mismatches\n"); 679 nlp = (long *)altsblock; 680 olp = (long *)sblock; 681 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 682 for ( ; olp < endlp; olp++, nlp++) { 683 if (*olp == *nlp) 684 continue; 685 printf("offset %ld, original %lx, alternate %lx\n", 686 (long)(olp - (long *)sblock), *olp, *nlp); 687 } 688 } 689 badsb(listerr, 690 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 691 return (0); 692 } 693 /* Now we know the SB is valid, we can write it back if needed */ 694 if (doswap) { 695 sbdirty(); 696 dirty(&asblk); 697 } 698 havesb = 1; 699 return (1); 700 } 701 702 int 703 cmpsblks(const struct fs *sb, struct fs *asb) 704 { 705 706 /* 707 * Copy fields which we don't care if they're different in the 708 * alternate superblocks, as they're either likely to be 709 * different because they're per-cylinder-group specific, or 710 * because they're transient details which are only maintained 711 * in the primary superblock. 712 */ 713 asb->fs_firstfield = sb->fs_firstfield; 714 asb->fs_unused_1 = sb->fs_unused_1; 715 asb->fs_time = sb->fs_time; 716 asb->fs_cstotal = sb->fs_cstotal; 717 asb->fs_cgrotor = sb->fs_cgrotor; 718 asb->fs_fmod = sb->fs_fmod; 719 asb->fs_clean = sb->fs_clean; 720 asb->fs_ronly = sb->fs_ronly; 721 asb->fs_flags = sb->fs_flags; 722 asb->fs_maxcontig = sb->fs_maxcontig; 723 asb->fs_minfree = sb->fs_minfree; 724 asb->fs_optim = sb->fs_optim; 725 asb->fs_rotdelay = sb->fs_rotdelay; 726 asb->fs_maxbpg = sb->fs_maxbpg; 727 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 728 asb->fs_contigdirs = sb->fs_contigdirs; 729 asb->fs_csp = sb->fs_csp; 730 asb->fs_maxcluster = sb->fs_maxcluster; 731 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 732 memmove(asb->fs_snapinum, 733 sb->fs_snapinum, sizeof sb->fs_snapinum); 734 asb->fs_avgfilesize = sb->fs_avgfilesize; 735 asb->fs_avgfpdir = sb->fs_avgfpdir; 736 asb->fs_pendingblocks = sb->fs_pendingblocks; 737 asb->fs_pendinginodes = sb->fs_pendinginodes; 738 memmove(asb->fs_sparecon, 739 sb->fs_sparecon, sizeof sb->fs_sparecon); 740 /* 741 * The following should not have to be copied, but need to be. 742 */ 743 asb->fs_fsbtodb = sb->fs_fsbtodb; 744 asb->fs_interleave = sb->fs_interleave; 745 asb->fs_npsect = sb->fs_npsect; 746 asb->fs_nrpos = sb->fs_nrpos; 747 asb->fs_qbmask = sb->fs_qbmask; 748 asb->fs_qfmask = sb->fs_qfmask; 749 asb->fs_state = sb->fs_state; 750 asb->fs_maxfilesize = sb->fs_maxfilesize; 751 752 /* 753 * Compare the superblocks, effectively checking every other 754 * field to see if they differ. 755 */ 756 return (memcmp(sb, asb, (int)sb->fs_sbsize)); 757 } 758 759 static void 760 badsb(listerr, s) 761 int listerr; 762 char *s; 763 { 764 765 if (!listerr) 766 return; 767 if (preen) 768 printf("%s: ", cdevname()); 769 pfatal("BAD SUPER BLOCK: %s\n", s); 770 } 771 772 /* 773 * Calculate a prototype superblock based on information in the disk label. 774 * When done the cgsblock macro can be calculated and the fs_ncg field 775 * can be used. Do NOT attempt to use other macros without verifying that 776 * their needed information is available! 777 */ 778 static int 779 calcsb(dev, devfd, fs) 780 const char *dev; 781 int devfd; 782 struct fs *fs; 783 { 784 struct disklabel *lp; 785 struct partition *pp; 786 int i; 787 788 lp = getdisklabel(dev, devfd); 789 pp = getdisklabelpart(dev,lp); 790 if (pp == 0) { 791 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 792 return (0); 793 } 794 if ((pp->p_fstype != FS_BSDFFS) && (pp->p_fstype != FS_APPLEUFS)) { 795 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 796 dev, pp->p_fstype < FSMAXTYPES ? 797 fstypenames[pp->p_fstype] : "unknown"); 798 return (0); 799 } 800 /* avoid divide by 0 */ 801 if (pp->p_fsize == 0 || pp->p_frag == 0) 802 return (0); 803 memset(fs, 0, sizeof(struct fs)); 804 fs->fs_fsize = pp->p_fsize; 805 fs->fs_frag = pp->p_frag; 806 fs->fs_cpg = pp->p_cpg; 807 fs->fs_size = pp->p_size; 808 fs->fs_ntrak = lp->d_ntracks; 809 fs->fs_nsect = lp->d_nsectors; 810 fs->fs_spc = lp->d_secpercyl; 811 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 812 fs->fs_sblkno = roundup( 813 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 814 fs->fs_frag); 815 fs->fs_cgmask = 0xffffffff; 816 for (i = fs->fs_ntrak; i > 1; i >>= 1) 817 fs->fs_cgmask <<= 1; 818 if (!POWEROF2(fs->fs_ntrak)) 819 fs->fs_cgmask <<= 1; 820 fs->fs_cgoffset = roundup( 821 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 822 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 823 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 824 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 825 fs->fs_fsbtodb++; 826 dev_bsize = lp->d_secsize; 827 return (1); 828 } 829 830 static struct disklabel * 831 getdisklabel(s, fd) 832 const char *s; 833 int fd; 834 { 835 static struct disklabel lab; 836 837 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 838 if (s == NULL) 839 return ((struct disklabel *)NULL); 840 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 841 errx(EEXIT, "%s: can't read disk label", s); 842 } 843 return (&lab); 844 } 845 846 static struct partition * 847 getdisklabelpart(dev, lp) 848 const char *dev; 849 struct disklabel *lp; 850 { 851 char *cp; 852 853 cp = strchr(dev, '\0') - 1; 854 if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'p')) && !isdigit(*cp)) { 855 return 0; 856 } 857 if (isdigit(*cp)) 858 return &lp->d_partitions[0]; 859 else 860 return &lp->d_partitions[*cp - 'a']; 861 } 862 863
Indexes created Thu Sep 25 16:09:42 GMT 2025