setup.c revision 1.80
1 /* $NetBSD: setup.c,v 1.80 2006/08/26 22:03:47 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 1.80 2006/08/26 22:03:47 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 66 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 67 68 static void badsb(int, const char *); 69 static int calcsb(const char *, int, struct fs *); 70 static int readsb(int); 71 static int readappleufs(void); 72 73 int16_t sblkpostbl[256]; 74 75 /* 76 * Read in a superblock finding an alternate if necessary. 77 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 78 * is already clean (preen mode only). 79 */ 80 int 81 setup(const char *dev) 82 { 83 long cg, size, asked, i, j; 84 long bmapsize; 85 struct disk_geom geo; 86 struct dkwedge_info dkw; 87 off_t sizepb; 88 struct stat statb; 89 struct fs proto; 90 int doskipclean; 91 u_int64_t maxfilesize; 92 struct csum *ccsp; 93 94 havesb = 0; 95 fswritefd = -1; 96 doskipclean = skipclean; 97 if (stat(dev, &statb) < 0) { 98 printf("Can't stat %s: %s\n", dev, strerror(errno)); 99 return (0); 100 } 101 if (!forceimage && !S_ISCHR(statb.st_mode)) { 102 pfatal("%s is not a character device", dev); 103 if (reply("CONTINUE") == 0) 104 return (0); 105 } 106 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 107 printf("Can't open %s: %s\n", dev, strerror(errno)); 108 return (0); 109 } 110 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 111 fswritefd = -1; 112 if (preen) 113 pfatal("NO WRITE ACCESS"); 114 printf("** %s (NO WRITE)\n", dev); 115 quiet = 0; 116 } else 117 if (!preen && !quiet) 118 printf("** %s\n", dev); 119 fsmodified = 0; 120 lfdir = 0; 121 initbarea(&sblk); 122 initbarea(&asblk); 123 sblk.b_un.b_buf = malloc(SBLOCKSIZE); 124 sblock = malloc(SBLOCKSIZE); 125 asblk.b_un.b_buf = malloc(SBLOCKSIZE); 126 altsblock = malloc(SBLOCKSIZE); 127 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 128 sblock == NULL || altsblock == NULL) 129 errx(EEXIT, "cannot allocate space for superblock"); 130 if (!forceimage && getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) != -1) 131 dev_bsize = secsize = geo.dg_secsize; 132 else 133 dev_bsize = secsize = DEV_BSIZE; 134 /* 135 * Read in the superblock, looking for alternates if necessary 136 */ 137 if (readsb(1) == 0) { 138 if (bflag || preen || forceimage || 139 calcsb(dev, fsreadfd, &proto) == 0) 140 return(0); 141 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 142 return (0); 143 for (cg = 0; cg < proto.fs_ncg; cg++) { 144 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 145 if (readsb(0) != 0) 146 break; 147 } 148 if (cg >= proto.fs_ncg) { 149 printf("%s %s\n%s %s\n%s %s\n", 150 "SEARCH FOR ALTERNATE SUPER-BLOCK", 151 "FAILED. YOU MUST USE THE", 152 "-b OPTION TO fsck_ffs TO SPECIFY THE", 153 "LOCATION OF AN ALTERNATE", 154 "SUPER-BLOCK TO SUPPLY NEEDED", 155 "INFORMATION; SEE fsck_ffs(8)."); 156 return(0); 157 } 158 doskipclean = 0; 159 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 160 } 161 if (debug) 162 printf("clean = %d\n", sblock->fs_clean); 163 if (doswap) 164 doskipclean = 0; 165 if (sblock->fs_clean & FS_ISCLEAN) { 166 if (doskipclean) { 167 if (!quiet) 168 pwarn("%sile system is clean; not checking\n", 169 preen ? "f" : "** F"); 170 return (-1); 171 } 172 if (!preen && !doswap) 173 pwarn("** File system is already clean\n"); 174 } 175 maxfsblock = sblock->fs_size; 176 maxino = sblock->fs_ncg * sblock->fs_ipg; 177 sizepb = sblock->fs_bsize; 178 maxfilesize = sblock->fs_bsize * NDADDR - 1; 179 for (i = 0; i < NIADDR; i++) { 180 sizepb *= NINDIR(sblock); 181 maxfilesize += sizepb; 182 } 183 if ((!is_ufs2 && cvtlevel >= 4) && 184 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 185 if (preen) 186 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 187 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 188 return(0); 189 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 190 /* Disable the postbl tables */ 191 sblock->fs_old_cpc = 0; 192 sblock->fs_old_nrpos = 1; 193 sblock->fs_old_trackskew = 0; 194 /* The other fields have already been updated by 195 * sb_oldfscompat_read 196 */ 197 sbdirty(); 198 } 199 if (!is_ufs2 && cvtlevel == 3 && 200 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 201 if (preen) 202 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 203 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 204 return(0); 205 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 206 sb_oldfscompat_write(sblock, sblock); 207 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 208 /* Leave postbl tables disabled, but blank its superblock region anyway */ 209 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 210 sblock->fs_old_cpc = 0; 211 sblock->fs_old_nrpos = 1; 212 sblock->fs_old_trackskew = 0; 213 memset(&sblock->fs_old_postbl_start, 0xff, 256); 214 sb_oldfscompat_read(sblock, &sblocksave); 215 sbdirty(); 216 } 217 /* 218 * Check and potentially fix certain fields in the super block. 219 */ 220 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 221 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 222 if (reply("SET TO DEFAULT") == 1) { 223 sblock->fs_optim = FS_OPTTIME; 224 sbdirty(); 225 } 226 } 227 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 228 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 229 sblock->fs_minfree); 230 if (reply("SET TO DEFAULT") == 1) { 231 sblock->fs_minfree = 10; 232 sbdirty(); 233 } 234 } 235 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 236 (sblock->fs_old_interleave < 1 || 237 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 238 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 239 sblock->fs_old_interleave); 240 sblock->fs_old_interleave = 1; 241 if (preen) 242 printf(" (FIXED)\n"); 243 if (preen || reply("SET TO DEFAULT") == 1) { 244 sbdirty(); 245 dirty(&asblk); 246 } 247 } 248 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 249 (sblock->fs_old_npsect < sblock->fs_old_nsect || 250 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 251 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 252 sblock->fs_old_npsect); 253 sblock->fs_old_npsect = sblock->fs_old_nsect; 254 if (preen) 255 printf(" (FIXED)\n"); 256 if (preen || reply("SET TO DEFAULT") == 1) { 257 sbdirty(); 258 dirty(&asblk); 259 } 260 } 261 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 262 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 263 sblock->fs_bmask); 264 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 265 if (preen) 266 printf(" (FIXED)\n"); 267 if (preen || reply("FIX") == 1) { 268 sbdirty(); 269 dirty(&asblk); 270 } 271 } 272 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 273 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 274 sblock->fs_fmask); 275 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 276 if (preen) 277 printf(" (FIXED)\n"); 278 if (preen || reply("FIX") == 1) { 279 sbdirty(); 280 dirty(&asblk); 281 } 282 } 283 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) { 284 if (sblock->fs_maxfilesize != maxfilesize) { 285 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 286 (unsigned long long)sblock->fs_maxfilesize); 287 sblock->fs_maxfilesize = maxfilesize; 288 if (preen) 289 printf(" (FIXED)\n"); 290 if (preen || reply("FIX") == 1) { 291 sbdirty(); 292 dirty(&asblk); 293 } 294 } 295 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2) 296 || 297 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1)) 298 { 299 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 300 sblock->fs_maxsymlinklen); 301 sblock->fs_maxsymlinklen = is_ufs2 ? 302 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1; 303 if (preen) 304 printf(" (FIXED)\n"); 305 if (preen || reply("FIX") == 1) { 306 sbdirty(); 307 dirty(&asblk); 308 } 309 } 310 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 311 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 312 (unsigned long long)sblock->fs_qbmask); 313 sblock->fs_qbmask = ~sblock->fs_bmask; 314 if (preen) 315 printf(" (FIXED)\n"); 316 if (preen || reply("FIX") == 1) { 317 sbdirty(); 318 dirty(&asblk); 319 } 320 } 321 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 322 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 323 (unsigned long long)sblock->fs_qfmask); 324 sblock->fs_qfmask = ~sblock->fs_fmask; 325 if (preen) 326 printf(" (FIXED)\n"); 327 if (preen || reply("FIX") == 1) { 328 sbdirty(); 329 dirty(&asblk); 330 } 331 } 332 newinofmt = 1; 333 } else { 334 sblock->fs_qbmask = ~sblock->fs_bmask; 335 sblock->fs_qfmask = ~sblock->fs_fmask; 336 newinofmt = 0; 337 } 338 /* 339 * Convert to new inode format. 340 */ 341 if (!is_ufs2 && cvtlevel >= 2 && 342 sblock->fs_old_inodefmt < FS_44INODEFMT) { 343 if (preen) 344 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 345 else if (!reply("CONVERT TO NEW INODE FORMAT")) 346 return(0); 347 doinglevel2++; 348 sblock->fs_old_inodefmt = FS_44INODEFMT; 349 sblock->fs_maxfilesize = maxfilesize; 350 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; 351 sblock->fs_qbmask = ~sblock->fs_bmask; 352 sblock->fs_qfmask = ~sblock->fs_fmask; 353 sbdirty(); 354 dirty(&asblk); 355 } 356 /* 357 * Convert to new cylinder group format. 358 */ 359 if (!is_ufs2 && cvtlevel >= 1 && 360 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 361 if (preen) 362 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 363 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 364 return(0); 365 doinglevel1++; 366 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 367 sblock->fs_old_nrpos = 8; 368 sblock->fs_old_postbloff = 369 (char *)(&sblock->fs_old_postbl_start) - 370 (char *)(&sblock->fs_firstfield); 371 sblock->fs_old_rotbloff = 372 (char *)(&sblock->fs_magic+1) - 373 (char *)(&sblock->fs_firstfield); 374 sblock->fs_cgsize = 375 fragroundup(sblock, CGSIZE(sblock)); 376 sbdirty(); 377 dirty(&asblk); 378 } 379 if (asblk.b_dirty && !bflag) { 380 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 381 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 382 if (needswap) 383 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 384 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 385 flush(fswritefd, &asblk); 386 } 387 /* 388 * read in the summary info. 389 */ 390 asked = 0; 391 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 392 if (sblock->fs_csp == NULL) { 393 pwarn("cannot alloc %u bytes for summary info\n", 394 sblock->fs_cssize); 395 goto badsblabel; 396 } 397 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 398 size = sblock->fs_cssize - i < sblock->fs_bsize ? 399 sblock->fs_cssize - i : sblock->fs_bsize; 400 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 401 if (bread(fsreadfd, (char *)ccsp, 402 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 403 size) != 0 && !asked) { 404 pfatal("BAD SUMMARY INFORMATION"); 405 if (reply("CONTINUE") == 0) { 406 markclean = 0; 407 exit(EEXIT); 408 } 409 asked++; 410 } 411 if (doswap) { 412 ffs_csum_swap(ccsp, ccsp, size); 413 bwrite(fswritefd, (char *)ccsp, 414 fsbtodb(sblock, 415 sblock->fs_csaddr + j * sblock->fs_frag), 416 size); 417 } 418 if (needswap) 419 ffs_csum_swap(ccsp, ccsp, size); 420 } 421 /* 422 * allocate and initialize the necessary maps 423 */ 424 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 425 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 426 if (blockmap == NULL) { 427 pwarn("cannot alloc %u bytes for blockmap\n", 428 (unsigned)bmapsize); 429 goto badsblabel; 430 } 431 inostathead = calloc((unsigned)(sblock->fs_ncg), 432 sizeof(struct inostatlist)); 433 if (inostathead == NULL) { 434 pwarn("cannot alloc %u bytes for inostathead\n", 435 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 436 goto badsblabel; 437 } 438 /* 439 * cs_ndir may be inaccurate, particularly if we're using the -b 440 * option, so set a minimum to prevent bogus subdirectory reconnects 441 * and really inefficient directory scans. 442 * Also set a maximum in case the value is too large. 443 */ 444 numdirs = sblock->fs_cstotal.cs_ndir; 445 if (numdirs < 1024) 446 numdirs = 1024; 447 if (numdirs > maxino + 1) 448 numdirs = maxino + 1; 449 dirhash = numdirs; 450 inplast = 0; 451 listmax = numdirs + 10; 452 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 453 sizeof(struct inoinfo *)); 454 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 455 sizeof(struct inoinfo *)); 456 if (inpsort == NULL || inphead == NULL) { 457 pwarn("cannot alloc %u bytes for inphead\n", 458 (unsigned)(numdirs * sizeof(struct inoinfo *))); 459 goto badsblabel; 460 } 461 cgrp = malloc(sblock->fs_cgsize); 462 if (cgrp == NULL) { 463 pwarn("cannot alloc %u bytes for cylinder group\n", 464 sblock->fs_cgsize); 465 goto badsblabel; 466 } 467 bufinit(); 468 if (sblock->fs_flags & FS_DOSOFTDEP) 469 usedsoftdep = 1; 470 else 471 usedsoftdep = 0; 472 473 if (!forceimage && dkw.dkw_parent[0]) 474 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 475 isappleufs = 1; 476 477 if (readappleufs()) 478 isappleufs = 1; 479 480 dirblksiz = DIRBLKSIZ; 481 if (isappleufs) 482 dirblksiz = APPLEUFS_DIRBLKSIZ; 483 484 if (debug) 485 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 486 487 return (1); 488 489 badsblabel: 490 markclean=0; 491 ckfini(); 492 return (0); 493 } 494 495 static int 496 readappleufs(void) 497 { 498 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 499 struct appleufslabel *appleufs; 500 int i; 501 502 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 503 * being block aligned (CD's?) 504 */ 505 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 506 (long)APPLEUFS_LABEL_SIZE) != 0) 507 return 0; 508 appleufsblk.b_bno = label; 509 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 510 511 appleufs = appleufsblk.b_un.b_appleufs; 512 513 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 514 if (!isappleufs) { 515 return 0; 516 } else { 517 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 518 if (reply("FIX") == 0) { 519 return 1; 520 } 521 ffs_appleufs_set(appleufs, NULL, -1, 0); 522 appleufsdirty(); 523 } 524 } 525 526 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 527 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 528 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 529 if (preen) { 530 printf(" (CORRECTED)\n"); 531 } 532 if (preen || reply("CORRECT")) { 533 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 534 appleufsdirty(); 535 } 536 } 537 538 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 539 pwarn("APPLE UFS LABEL NAME TOO LONG"); 540 if (preen) { 541 printf(" (TRUNCATED)\n"); 542 } 543 if (preen || reply("TRUNCATE")) { 544 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 545 appleufsdirty(); 546 } 547 } 548 549 if (ntohs(appleufs->ul_namelen) == 0) { 550 pwarn("MISSING APPLE UFS LABEL NAME"); 551 if (preen) { 552 printf(" (FIXED)\n"); 553 } 554 if (preen || reply("FIX")) { 555 ffs_appleufs_set(appleufs, NULL, -1, 0); 556 appleufsdirty(); 557 } 558 } 559 560 /* Scan name for first illegal character */ 561 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 562 if ((appleufs->ul_name[i] == '\0') || 563 (appleufs->ul_name[i] == ':') || 564 (appleufs->ul_name[i] == '/')) { 565 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 566 if (preen) { 567 printf(" (TRUNCATED)\n"); 568 } 569 if (preen || reply("TRUNCATE")) { 570 appleufs->ul_namelen = i+1; 571 appleufsdirty(); 572 } 573 break; 574 } 575 } 576 577 /* Check the checksum last, because if anything else was wrong, 578 * then the checksum gets reset anyway. 579 */ 580 appleufs->ul_checksum = 0; 581 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 582 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 583 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 584 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 585 if (preen) { 586 printf(" (CORRECTED)\n"); 587 } 588 if (preen || reply("CORRECT")) { 589 appleufsdirty(); 590 } else { 591 /* put the incorrect checksum back in place */ 592 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 593 } 594 } 595 return 1; 596 } 597 598 /* 599 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 600 */ 601 static int 602 detect_byteorder(struct fs *fs, int sblockoff) 603 { 604 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 605 fs->fs_magic == bswap32(FS_UFS1_MAGIC))) 606 /* Likely to be the first alternate of a fs with 64k blocks */ 607 return -1; 608 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 609 if (endian == 0 || BYTE_ORDER == endian) { 610 needswap = 0; 611 doswap = do_blkswap = do_dirswap = 0; 612 } else { 613 needswap = 1; 614 doswap = do_blkswap = do_dirswap = 1; 615 } 616 return 0; 617 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) || 618 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 619 if (endian == 0 || BYTE_ORDER != endian) { 620 needswap = 1; 621 doswap = do_blkswap = do_dirswap = 0; 622 } else { 623 needswap = 0; 624 doswap = do_blkswap = do_dirswap = 1; 625 } 626 return 0; 627 } 628 return -1; 629 } 630 631 /* 632 * Possible superblock locations ordered from most to least likely. 633 */ 634 static off_t sblock_try[] = SBLOCKSEARCH; 635 636 /* 637 * Read in the super block and its summary info. 638 */ 639 static int 640 readsb(int listerr) 641 { 642 daddr_t super = 0; 643 struct fs *fs; 644 int i; 645 646 if (bflag) { 647 super = bflag; 648 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 649 (long)SBLOCKSIZE) != 0) 650 return (0); 651 fs = sblk.b_un.b_fs; 652 if (detect_byteorder(fs, -1) < 0) { 653 badsb(listerr, "MAGIC NUMBER WRONG"); 654 return (0); 655 } 656 } else { 657 for (i = 0; sblock_try[i] != -1; i++) { 658 super = sblock_try[i] / dev_bsize; 659 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 660 super, (long)SBLOCKSIZE) != 0) 661 continue; 662 fs = sblk.b_un.b_fs; 663 if (detect_byteorder(fs, sblock_try[i]) == 0) 664 break; 665 } 666 if (sblock_try[i] == -1) { 667 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 668 return (0); 669 } 670 } 671 if (doswap) { 672 if (preen) 673 errx(EEXIT, "incompatible options -B and -p"); 674 if (nflag) 675 errx(EEXIT, "incompatible options -B and -n"); 676 if (endian == LITTLE_ENDIAN) { 677 if (!reply("CONVERT TO LITTLE ENDIAN")) 678 return 0; 679 } else if (endian == BIG_ENDIAN) { 680 if (!reply("CONVERT TO BIG ENDIAN")) 681 return 0; 682 } else 683 pfatal("INTERNAL ERROR: unknown endian"); 684 } 685 if (needswap) 686 pwarn("** Swapped byte order\n"); 687 /* swap SB byte order if asked */ 688 if (doswap) 689 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 690 691 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 692 if (needswap) 693 ffs_sb_swap(sblk.b_un.b_fs, sblock); 694 695 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 696 697 /* 698 * run a few consistency checks of the super block 699 */ 700 if (sblock->fs_sbsize > SBLOCKSIZE) 701 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 702 /* 703 * Compute block size that the filesystem is based on, 704 * according to fsbtodb, and adjust superblock block number 705 * so we can tell if this is an alternate later. 706 */ 707 super *= dev_bsize; 708 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 709 sblk.b_bno = super / dev_bsize; 710 sblk.b_size = SBLOCKSIZE; 711 if (bflag) 712 goto out; 713 /* 714 * Set all possible fields that could differ, then do check 715 * of whole super block against an alternate super block-> 716 * When an alternate super-block is specified this check is skipped. 717 */ 718 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 719 if (asblk.b_errs) 720 return (0); 721 /* swap SB byte order if asked */ 722 if (doswap) 723 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 724 725 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 726 if (needswap) 727 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 728 if (cmpsblks(sblock, altsblock)) { 729 if (debug) { 730 uint32_t *nlp, *olp, *endlp; 731 732 printf("superblock mismatches\n"); 733 nlp = (uint32_t *)altsblock; 734 olp = (uint32_t *)sblock; 735 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 736 for ( ; olp < endlp; olp++, nlp++) { 737 if (*olp == *nlp) 738 continue; 739 printf("offset %#x, original 0x%08x, alternate " 740 "0x%08x\n", 741 (int)((uint8_t *)olp-(uint8_t *)sblock), 742 *olp, *nlp); 743 } 744 } 745 badsb(listerr, 746 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 747 /* 748 return (0); 749 */ 750 } 751 out: 752 753 sb_oldfscompat_read(sblock, &sblocksave); 754 755 /* Now we know the SB is valid, we can write it back if needed */ 756 if (doswap) { 757 sbdirty(); 758 dirty(&asblk); 759 } 760 havesb = 1; 761 return (1); 762 } 763 764 int 765 cmpsblks(const struct fs *sb, struct fs *asb) 766 { 767 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 768 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 769 return cmpsblks42(sb, asb); 770 else 771 return cmpsblks44(sb, asb); 772 } 773 if (asb->fs_sblkno != sb->fs_sblkno || 774 asb->fs_cblkno != sb->fs_cblkno || 775 asb->fs_iblkno != sb->fs_iblkno || 776 asb->fs_dblkno != sb->fs_dblkno || 777 asb->fs_ncg != sb->fs_ncg || 778 asb->fs_bsize != sb->fs_bsize || 779 asb->fs_fsize != sb->fs_fsize || 780 asb->fs_frag != sb->fs_frag || 781 asb->fs_bmask != sb->fs_bmask || 782 asb->fs_fmask != sb->fs_fmask || 783 asb->fs_bshift != sb->fs_bshift || 784 asb->fs_fshift != sb->fs_fshift || 785 asb->fs_fragshift != sb->fs_fragshift || 786 asb->fs_fsbtodb != sb->fs_fsbtodb || 787 asb->fs_sbsize != sb->fs_sbsize || 788 asb->fs_nindir != sb->fs_nindir || 789 asb->fs_inopb != sb->fs_inopb || 790 asb->fs_cssize != sb->fs_cssize || 791 asb->fs_ipg != sb->fs_ipg || 792 asb->fs_fpg != sb->fs_fpg || 793 asb->fs_magic != sb->fs_magic) 794 return 1; 795 return 0; 796 } 797 798 /* BSD 4.2 performed the following superblock comparison 799 * It should correspond to FS_42POSTBLFMT 800 * (although note that in 4.2, the fs_old_postblformat 801 * field didn't exist and the corresponding bits are 802 * located near the end of the postbl itself, where they 803 * are not likely to be used.) 804 */ 805 int 806 cmpsblks42(const struct fs *sb, struct fs *asb) 807 { 808 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 809 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 810 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 811 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 812 asb->fs_cgrotor = sb->fs_cgrotor; 813 asb->fs_fmod = sb->fs_fmod; 814 asb->fs_clean = sb->fs_clean; 815 asb->fs_ronly = sb->fs_ronly; 816 asb->fs_old_flags = sb->fs_old_flags; 817 asb->fs_maxcontig = sb->fs_maxcontig; 818 asb->fs_minfree = sb->fs_minfree; 819 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 820 asb->fs_maxbpg = sb->fs_maxbpg; 821 822 /* The former fs_csp, totaling 128 bytes */ 823 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 824 asb->fs_contigdirs = sb->fs_contigdirs; 825 asb->fs_csp = sb->fs_csp; 826 asb->fs_maxcluster = sb->fs_maxcluster; 827 asb->fs_active = sb->fs_active; 828 829 /* The former fs_fsmnt, totaling 512 bytes */ 830 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 831 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 832 833 return memcmp(sb, asb, sb->fs_sbsize); 834 } 835 836 /* BSD 4.4 performed the following superblock comparison 837 * This was used in NetBSD through 1.6.1 838 * 839 * Note that this implementation is destructive to asb. 840 */ 841 int 842 cmpsblks44(const struct fs *sb, struct fs *asb) 843 { 844 /* 845 * "Copy fields which we don't care if they're different in the 846 * alternate superblocks, as they're either likely to be 847 * different because they're per-cylinder-group specific, or 848 * because they're transient details which are only maintained 849 * in the primary superblock." 850 */ 851 asb->fs_firstfield = sb->fs_firstfield; 852 asb->fs_unused_1 = sb->fs_unused_1; 853 asb->fs_old_time = sb->fs_old_time; 854 asb->fs_old_cstotal = sb->fs_old_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_optim = sb->fs_optim; 863 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 864 asb->fs_maxbpg = sb->fs_maxbpg; 865 866 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 867 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 868 asb->fs_contigdirs = sb->fs_contigdirs; 869 asb->fs_csp = sb->fs_csp; 870 asb->fs_maxcluster = sb->fs_maxcluster; 871 asb->fs_active = sb->fs_active; 872 873 /* The former fs_fsmnt, totaling 512 bytes */ 874 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 875 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 876 877 /* The former fs_sparecon, totaling 200 bytes */ 878 memmove(asb->fs_snapinum, 879 sb->fs_snapinum, sizeof sb->fs_snapinum); 880 asb->fs_avgfilesize = sb->fs_avgfilesize; 881 asb->fs_avgfpdir = sb->fs_avgfpdir; 882 asb->fs_save_cgsize = sb->fs_save_cgsize; 883 memmove(asb->fs_sparecon32, 884 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 885 asb->fs_flags = sb->fs_flags; 886 887 /* Original comment: 888 * "The following should not have to be copied, but need to be." 889 */ 890 asb->fs_fsbtodb = sb->fs_fsbtodb; 891 asb->fs_old_interleave = sb->fs_old_interleave; 892 asb->fs_old_npsect = sb->fs_old_npsect; 893 asb->fs_old_nrpos = sb->fs_old_nrpos; 894 asb->fs_state = sb->fs_state; 895 asb->fs_qbmask = sb->fs_qbmask; 896 asb->fs_qfmask = sb->fs_qfmask; 897 asb->fs_state = sb->fs_state; 898 asb->fs_maxfilesize = sb->fs_maxfilesize; 899 900 /* 901 * "Compare the superblocks, effectively checking every other 902 * field to see if they differ." 903 */ 904 return memcmp(sb, asb, sb->fs_sbsize); 905 } 906 907 908 static void 909 badsb(int listerr, const char *s) 910 { 911 912 if (!listerr) 913 return; 914 if (preen) 915 printf("%s: ", cdevname()); 916 pfatal("BAD SUPER BLOCK: %s\n", s); 917 } 918 919 /* 920 * Calculate a prototype superblock based on information in the disk label. 921 * When done the cgsblock macro can be calculated and the fs_ncg field 922 * can be used. Do NOT attempt to use other macros without verifying that 923 * their needed information is available! 924 */ 925 static int 926 calcsb(const char *dev, int devfd, struct fs *fs) 927 { 928 struct dkwedge_info dkw; 929 struct disk_geom geo; 930 int i, nspf; 931 932 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 933 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 934 if (dkw.dkw_parent[0] == '\0') { 935 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 936 return (0); 937 } 938 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) && 939 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS)) { 940 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 941 dev, dkw.dkw_ptype); 942 return (0); 943 } 944 memcpy(fs, &sblk.b_un.b_fs, sizeof(struct fs)); 945 nspf = fs->fs_fsize / geo.dg_secsize; 946 fs->fs_old_nspf = nspf; 947 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 948 fs->fs_fsbtodb++; 949 dev_bsize = geo.dg_secsize; 950 if (fs->fs_magic == FS_UFS2_MAGIC) { 951 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 952 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 953 fs->fs_old_cgmask = 0xffffffff; 954 for (i = geo.dg_ntracks; i > 1; i >>= 1) 955 fs->fs_old_cgmask <<= 1; 956 if (!POWEROF2(geo.dg_ntracks)) 957 fs->fs_old_cgmask <<= 1; 958 fs->fs_old_cgoffset = roundup( 959 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 960 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 961 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 962 fs->fs_old_cpg); 963 } 964 return (1); 965 } 966
Indexes created Wed Sep 24 05:09:52 GMT 2025