1 /* $NetBSD: setup.c,v 1.93 2011/06/09 19:57:52 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 1.93 2011/06/09 19:57:52 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/ufs/quota2.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 #include "partutil.h" 66 #include "exitvalues.h" 67 68 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 69 70 static void badsb(int, const char *); 71 static int calcsb(const char *, int, struct fs *); 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, const char *origdev) 84 { 85 long cg, size, asked, i, j; 86 long bmapsize; 87 struct disk_geom geo; 88 struct dkwedge_info dkw; 89 off_t sizepb; 90 struct stat statb; 91 struct fs proto; 92 int doskipclean; 93 u_int64_t maxfilesize; 94 struct csum *ccsp; 95 int fd; 96 97 havesb = 0; 98 fswritefd = -1; 99 doskipclean = skipclean; 100 if (stat(dev, &statb) < 0) { 101 printf("Can't stat %s: %s\n", dev, strerror(errno)); 102 return (0); 103 } 104 if (!forceimage && !S_ISCHR(statb.st_mode)) { 105 pfatal("%s is not a character device", dev); 106 if (reply("CONTINUE") == 0) 107 return (0); 108 } 109 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 110 printf("Can't open %s: %s\n", dev, strerror(errno)); 111 return (0); 112 } 113 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 114 fswritefd = -1; 115 if (preen) 116 pfatal("NO WRITE ACCESS"); 117 printf("** %s (NO WRITE)\n", dev); 118 quiet = 0; 119 } else 120 if (!preen && !quiet) 121 printf("** %s\n", dev); 122 fsmodified = 0; 123 lfdir = 0; 124 initbarea(&sblk); 125 initbarea(&asblk); 126 sblk.b_un.b_buf = malloc(SBLOCKSIZE); 127 sblock = malloc(SBLOCKSIZE); 128 asblk.b_un.b_buf = malloc(SBLOCKSIZE); 129 altsblock = malloc(SBLOCKSIZE); 130 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 131 sblock == NULL || altsblock == NULL) 132 errexit("Cannot allocate space for superblock"); 133 if (strcmp(dev, origdev) && !forceimage) { 134 /* 135 * dev isn't the original fs (for example it's a snapshot) 136 * do getdiskinfo on the original device 137 */ 138 fd = open(origdev, O_RDONLY); 139 if (fd < 0) { 140 warn("Can't open %s", origdev); 141 return (0); 142 } 143 } else { 144 fd = fsreadfd; 145 } 146 if (!forceimage && getdiskinfo(origdev, fd, NULL, &geo, &dkw) != -1) 147 dev_bsize = secsize = geo.dg_secsize; 148 else 149 dev_bsize = secsize = DEV_BSIZE; 150 /* 151 * Read in the superblock, looking for alternates if necessary 152 */ 153 if (readsb(1) == 0) { 154 if (bflag || preen || forceimage || 155 calcsb(dev, fsreadfd, &proto) == 0) 156 return(0); 157 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 158 return (0); 159 for (cg = 0; cg < proto.fs_ncg; cg++) { 160 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 161 if (readsb(0) != 0) 162 break; 163 } 164 if (cg >= proto.fs_ncg) { 165 printf("%s %s\n%s %s\n%s %s\n", 166 "SEARCH FOR ALTERNATE SUPER-BLOCK", 167 "FAILED. YOU MUST USE THE", 168 "-b OPTION TO fsck_ffs TO SPECIFY THE", 169 "LOCATION OF AN ALTERNATE", 170 "SUPER-BLOCK TO SUPPLY NEEDED", 171 "INFORMATION; SEE fsck_ffs(8)."); 172 return(0); 173 } 174 doskipclean = 0; 175 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 176 } 177 178 if (!quota2_check_doquota()) 179 doskipclean = 0; 180 181 /* ffs_superblock_layout() == 2 */ 182 if (sblock->fs_magic != FS_UFS1_MAGIC || 183 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) { 184 /* can have WAPBL */ 185 if (check_wapbl() != 0) { 186 doskipclean = 0; 187 } 188 if (sblock->fs_flags & FS_DOWAPBL) { 189 if (preen && doskipclean) { 190 if (!quiet) 191 pwarn("file system is journaled; " 192 "not checking\n"); 193 return (-1); 194 } 195 if (!quiet) 196 pwarn("** File system is journaled; " 197 "replaying journal\n"); 198 replay_wapbl(); 199 doskipclean = 0; 200 sblock->fs_flags &= ~FS_DOWAPBL; 201 sbdirty(); 202 /* Although we may have updated the superblock from 203 * the journal, we are still going to do a full check, 204 * so we don't bother to re-read the superblock from 205 * the journal. 206 * XXX, instead we could re-read the superblock and 207 * then not force doskipclean = 0 208 */ 209 } 210 } 211 if (debug) 212 printf("clean = %d\n", sblock->fs_clean); 213 214 if (doswap) 215 doskipclean = 0; 216 217 if (sblock->fs_clean & FS_ISCLEAN) { 218 if (doskipclean) { 219 if (!quiet) 220 pwarn("%sile system is clean; not checking\n", 221 preen ? "f" : "** F"); 222 return (-1); 223 } 224 if (!preen && !doswap) 225 pwarn("** File system is already clean\n"); 226 } 227 maxfsblock = sblock->fs_size; 228 maxino = sblock->fs_ncg * sblock->fs_ipg; 229 sizepb = sblock->fs_bsize; 230 maxfilesize = sblock->fs_bsize * NDADDR - 1; 231 for (i = 0; i < NIADDR; i++) { 232 sizepb *= NINDIR(sblock); 233 maxfilesize += sizepb; 234 } 235 if ((!is_ufs2 && cvtlevel >= 4) && 236 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 237 if (preen) 238 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 239 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 240 return(0); 241 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 242 /* Disable the postbl tables */ 243 sblock->fs_old_cpc = 0; 244 sblock->fs_old_nrpos = 1; 245 sblock->fs_old_trackskew = 0; 246 /* The other fields have already been updated by 247 * sb_oldfscompat_read 248 */ 249 sbdirty(); 250 } 251 if (!is_ufs2 && cvtlevel == 3 && 252 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 253 if (preen) 254 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 255 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 256 return(0); 257 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 258 sb_oldfscompat_write(sblock, sblock); 259 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 260 /* Leave postbl tables disabled, but blank its superblock region anyway */ 261 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 262 sblock->fs_old_cpc = 0; 263 sblock->fs_old_nrpos = 1; 264 sblock->fs_old_trackskew = 0; 265 memset(&sblock->fs_old_postbl_start, 0xff, 256); 266 sb_oldfscompat_read(sblock, &sblocksave); 267 sbdirty(); 268 } 269 /* 270 * Check and potentially fix certain fields in the super block. 271 */ 272 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 273 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 274 if (reply("CLEAR") == 1) { 275 sblock->fs_flags &= FS_KNOWN_FLAGS; 276 sbdirty(); 277 } 278 } 279 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 280 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 281 if (reply("SET TO DEFAULT") == 1) { 282 sblock->fs_optim = FS_OPTTIME; 283 sbdirty(); 284 } 285 } 286 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 287 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 288 sblock->fs_minfree); 289 if (reply("SET TO DEFAULT") == 1) { 290 sblock->fs_minfree = 10; 291 sbdirty(); 292 } 293 } 294 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 295 (sblock->fs_old_interleave < 1 || 296 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 297 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 298 sblock->fs_old_interleave); 299 sblock->fs_old_interleave = 1; 300 if (preen) 301 printf(" (FIXED)\n"); 302 if (preen || reply("SET TO DEFAULT") == 1) { 303 sbdirty(); 304 dirty(&asblk); 305 } 306 } 307 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 308 (sblock->fs_old_npsect < sblock->fs_old_nsect || 309 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 310 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 311 sblock->fs_old_npsect); 312 sblock->fs_old_npsect = sblock->fs_old_nsect; 313 if (preen) 314 printf(" (FIXED)\n"); 315 if (preen || reply("SET TO DEFAULT") == 1) { 316 sbdirty(); 317 dirty(&asblk); 318 } 319 } 320 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 321 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 322 sblock->fs_bmask); 323 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 324 if (preen) 325 printf(" (FIXED)\n"); 326 if (preen || reply("FIX") == 1) { 327 sbdirty(); 328 dirty(&asblk); 329 } 330 } 331 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 332 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 333 sblock->fs_fmask); 334 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 335 if (preen) 336 printf(" (FIXED)\n"); 337 if (preen || reply("FIX") == 1) { 338 sbdirty(); 339 dirty(&asblk); 340 } 341 } 342 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) { 343 if (sblock->fs_maxfilesize != maxfilesize) { 344 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 345 (unsigned long long)sblock->fs_maxfilesize); 346 sblock->fs_maxfilesize = maxfilesize; 347 if (preen) 348 printf(" (FIXED)\n"); 349 if (preen || reply("FIX") == 1) { 350 sbdirty(); 351 dirty(&asblk); 352 } 353 } 354 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2) 355 || 356 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1)) 357 { 358 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 359 sblock->fs_maxsymlinklen); 360 sblock->fs_maxsymlinklen = is_ufs2 ? 361 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1; 362 if (preen) 363 printf(" (FIXED)\n"); 364 if (preen || reply("FIX") == 1) { 365 sbdirty(); 366 dirty(&asblk); 367 } 368 } 369 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 370 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 371 (unsigned long long)sblock->fs_qbmask); 372 sblock->fs_qbmask = ~sblock->fs_bmask; 373 if (preen) 374 printf(" (FIXED)\n"); 375 if (preen || reply("FIX") == 1) { 376 sbdirty(); 377 dirty(&asblk); 378 } 379 } 380 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 381 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 382 (unsigned long long)sblock->fs_qfmask); 383 sblock->fs_qfmask = ~sblock->fs_fmask; 384 if (preen) 385 printf(" (FIXED)\n"); 386 if (preen || reply("FIX") == 1) { 387 sbdirty(); 388 dirty(&asblk); 389 } 390 } 391 newinofmt = 1; 392 } else { 393 sblock->fs_qbmask = ~sblock->fs_bmask; 394 sblock->fs_qfmask = ~sblock->fs_fmask; 395 newinofmt = 0; 396 } 397 /* 398 * Convert to new inode format. 399 */ 400 if (!is_ufs2 && cvtlevel >= 2 && 401 sblock->fs_old_inodefmt < FS_44INODEFMT) { 402 if (preen) 403 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 404 else if (!reply("CONVERT TO NEW INODE FORMAT")) 405 return(0); 406 doinglevel2++; 407 sblock->fs_old_inodefmt = FS_44INODEFMT; 408 sblock->fs_maxfilesize = maxfilesize; 409 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; 410 sblock->fs_qbmask = ~sblock->fs_bmask; 411 sblock->fs_qfmask = ~sblock->fs_fmask; 412 sbdirty(); 413 dirty(&asblk); 414 } 415 /* 416 * Convert to new cylinder group format. 417 */ 418 if (!is_ufs2 && cvtlevel >= 1 && 419 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 420 if (preen) 421 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 422 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 423 return(0); 424 doinglevel1++; 425 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 426 sblock->fs_old_nrpos = 8; 427 sblock->fs_old_postbloff = 428 (char *)(&sblock->fs_old_postbl_start) - 429 (char *)(&sblock->fs_firstfield); 430 sblock->fs_old_rotbloff = 431 (char *)(&sblock->fs_magic+1) - 432 (char *)(&sblock->fs_firstfield); 433 sblock->fs_cgsize = 434 fragroundup(sblock, CGSIZE(sblock)); 435 sbdirty(); 436 dirty(&asblk); 437 } 438 if (asblk.b_dirty && !bflag) { 439 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 440 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 441 if (needswap) 442 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 443 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 444 flush(fswritefd, &asblk); 445 } 446 /* 447 * read in the summary info. 448 */ 449 asked = 0; 450 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 451 if (sblock->fs_csp == NULL) { 452 pwarn("cannot alloc %u bytes for summary info\n", 453 sblock->fs_cssize); 454 goto badsblabel; 455 } 456 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 457 size = sblock->fs_cssize - i < sblock->fs_bsize ? 458 sblock->fs_cssize - i : sblock->fs_bsize; 459 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 460 if (bread(fsreadfd, (char *)ccsp, 461 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 462 size) != 0 && !asked) { 463 pfatal("BAD SUMMARY INFORMATION"); 464 if (reply("CONTINUE") == 0) { 465 markclean = 0; 466 exit(FSCK_EXIT_CHECK_FAILED); 467 } 468 asked++; 469 } 470 if (doswap) { 471 ffs_csum_swap(ccsp, ccsp, size); 472 bwrite(fswritefd, (char *)ccsp, 473 fsbtodb(sblock, 474 sblock->fs_csaddr + j * sblock->fs_frag), 475 size); 476 } 477 if (needswap) 478 ffs_csum_swap(ccsp, ccsp, size); 479 } 480 /* 481 * allocate and initialize the necessary maps 482 */ 483 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 484 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 485 if (blockmap == NULL) { 486 pwarn("cannot alloc %u bytes for blockmap\n", 487 (unsigned)bmapsize); 488 goto badsblabel; 489 } 490 inostathead = calloc((unsigned)(sblock->fs_ncg), 491 sizeof(struct inostatlist)); 492 if (inostathead == NULL) { 493 pwarn("cannot alloc %u bytes for inostathead\n", 494 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 495 goto badsblabel; 496 } 497 /* 498 * cs_ndir may be inaccurate, particularly if we're using the -b 499 * option, so set a minimum to prevent bogus subdirectory reconnects 500 * and really inefficient directory scans. 501 * Also set a maximum in case the value is too large. 502 */ 503 numdirs = sblock->fs_cstotal.cs_ndir; 504 if (numdirs < 1024) 505 numdirs = 1024; 506 if (numdirs > maxino + 1) 507 numdirs = maxino + 1; 508 dirhash = numdirs; 509 inplast = 0; 510 listmax = numdirs + 10; 511 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 512 sizeof(struct inoinfo *)); 513 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 514 sizeof(struct inoinfo *)); 515 if (inpsort == NULL || inphead == NULL) { 516 pwarn("cannot alloc %u bytes for inphead\n", 517 (unsigned)(numdirs * sizeof(struct inoinfo *))); 518 goto badsblabel; 519 } 520 cgrp = malloc(sblock->fs_cgsize); 521 if (cgrp == NULL) { 522 pwarn("cannot alloc %u bytes for cylinder group\n", 523 sblock->fs_cgsize); 524 goto badsblabel; 525 } 526 bufinit(); 527 if (sblock->fs_flags & FS_DOSOFTDEP) 528 usedsoftdep = 1; 529 else 530 usedsoftdep = 0; 531 532 if (!forceimage && dkw.dkw_parent[0]) 533 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 534 isappleufs = 1; 535 536 if (readappleufs()) 537 isappleufs = 1; 538 539 dirblksiz = DIRBLKSIZ; 540 if (isappleufs) 541 dirblksiz = APPLEUFS_DIRBLKSIZ; 542 543 if (debug) 544 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 545 546 if (sblock->fs_flags & FS_DOQUOTA2) { 547 /* allocate the quota hash table */ 548 /* 549 * first compute the size of the hash table 550 * We know the smallest block size is 4k, so we can use 2k 551 * for the hash table; as an entry is 8 bytes we can store 552 * 256 entries. So let start q2h_hash_shift at 8 553 */ 554 for (q2h_hash_shift = 8; 555 q2h_hash_shift < 15; 556 q2h_hash_shift++) { 557 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 558 sizeof(struct quota2_header) > sblock->fs_bsize) 559 break; 560 } 561 q2h_hash_mask = (1 << q2h_hash_shift) - 1; 562 if (debug) { 563 printf("quota hash shift %d, %d entries, mask 0x%x\n", 564 q2h_hash_shift, (1 << q2h_hash_shift), 565 q2h_hash_mask); 566 } 567 uquot_user_hash = 568 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 569 uquot_group_hash = 570 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 571 if (uquot_user_hash == NULL || uquot_group_hash == NULL) 572 errexit("Cannot allocate space for quotas hash\n"); 573 } else { 574 uquot_user_hash = uquot_group_hash = NULL; 575 q2h_hash_shift = q2h_hash_mask = 0; 576 } 577 return (1); 578 badsblabel: 579 markclean=0; 580 ckfini(1); 581 return (0); 582 } 583 584 static int 585 readappleufs(void) 586 { 587 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 588 struct appleufslabel *appleufs; 589 int i; 590 591 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 592 * being block aligned (CD's?) 593 */ 594 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0) 595 return 0; 596 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 597 (long)APPLEUFS_LABEL_SIZE) != 0) 598 return 0; 599 appleufsblk.b_bno = label; 600 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 601 602 appleufs = appleufsblk.b_un.b_appleufs; 603 604 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 605 if (!isappleufs) { 606 return 0; 607 } else { 608 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 609 if (reply("FIX") == 0) { 610 return 1; 611 } 612 ffs_appleufs_set(appleufs, NULL, -1, 0); 613 appleufsdirty(); 614 } 615 } 616 617 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 618 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 619 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 620 if (preen) { 621 printf(" (CORRECTED)\n"); 622 } 623 if (preen || reply("CORRECT")) { 624 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 625 appleufsdirty(); 626 } 627 } 628 629 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 630 pwarn("APPLE UFS LABEL NAME TOO LONG"); 631 if (preen) { 632 printf(" (TRUNCATED)\n"); 633 } 634 if (preen || reply("TRUNCATE")) { 635 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 636 appleufsdirty(); 637 } 638 } 639 640 if (ntohs(appleufs->ul_namelen) == 0) { 641 pwarn("MISSING APPLE UFS LABEL NAME"); 642 if (preen) { 643 printf(" (FIXED)\n"); 644 } 645 if (preen || reply("FIX")) { 646 ffs_appleufs_set(appleufs, NULL, -1, 0); 647 appleufsdirty(); 648 } 649 } 650 651 /* Scan name for first illegal character */ 652 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 653 if ((appleufs->ul_name[i] == '\0') || 654 (appleufs->ul_name[i] == ':') || 655 (appleufs->ul_name[i] == '/')) { 656 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 657 if (preen) { 658 printf(" (TRUNCATED)\n"); 659 } 660 if (preen || reply("TRUNCATE")) { 661 appleufs->ul_namelen = i+1; 662 appleufsdirty(); 663 } 664 break; 665 } 666 } 667 668 /* Check the checksum last, because if anything else was wrong, 669 * then the checksum gets reset anyway. 670 */ 671 appleufs->ul_checksum = 0; 672 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 673 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 674 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 675 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 676 if (preen) { 677 printf(" (CORRECTED)\n"); 678 } 679 if (preen || reply("CORRECT")) { 680 appleufsdirty(); 681 } else { 682 /* put the incorrect checksum back in place */ 683 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 684 } 685 } 686 return 1; 687 } 688 689 /* 690 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 691 */ 692 static int 693 detect_byteorder(struct fs *fs, int sblockoff) 694 { 695 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 696 fs->fs_magic == bswap32(FS_UFS1_MAGIC))) 697 /* Likely to be the first alternate of a fs with 64k blocks */ 698 return -1; 699 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 700 if (endian == 0 || BYTE_ORDER == endian) { 701 needswap = 0; 702 doswap = do_blkswap = do_dirswap = 0; 703 } else { 704 needswap = 1; 705 doswap = do_blkswap = do_dirswap = 1; 706 } 707 return 0; 708 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) || 709 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 710 if (endian == 0 || BYTE_ORDER != endian) { 711 needswap = 1; 712 doswap = do_blkswap = do_dirswap = 0; 713 } else { 714 needswap = 0; 715 doswap = do_blkswap = do_dirswap = 1; 716 } 717 return 0; 718 } 719 return -1; 720 } 721 722 /* 723 * Possible superblock locations ordered from most to least likely. 724 */ 725 static off_t sblock_try[] = SBLOCKSEARCH; 726 727 /* 728 * Read in the super block and its summary info. 729 */ 730 static int 731 readsb(int listerr) 732 { 733 daddr_t super = 0; 734 struct fs *fs; 735 int i; 736 737 if (bflag) { 738 super = bflag; 739 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 740 (long)SBLOCKSIZE) != 0) 741 return (0); 742 fs = sblk.b_un.b_fs; 743 if (detect_byteorder(fs, -1) < 0) { 744 badsb(listerr, "MAGIC NUMBER WRONG"); 745 return (0); 746 } 747 } else { 748 for (i = 0; sblock_try[i] != -1; i++) { 749 super = sblock_try[i] / dev_bsize; 750 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 751 super, (long)SBLOCKSIZE) != 0) 752 continue; 753 fs = sblk.b_un.b_fs; 754 if (detect_byteorder(fs, sblock_try[i]) == 0) 755 break; 756 } 757 if (sblock_try[i] == -1) { 758 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 759 return (0); 760 } 761 } 762 if (doswap) { 763 if (preen) 764 errx(FSCK_EXIT_USAGE, 765 "Incompatible options -B and -p"); 766 if (nflag) 767 errx(FSCK_EXIT_USAGE, 768 "Incompatible options -B and -n"); 769 if (endian == LITTLE_ENDIAN) { 770 if (!reply("CONVERT TO LITTLE ENDIAN")) 771 return 0; 772 } else if (endian == BIG_ENDIAN) { 773 if (!reply("CONVERT TO BIG ENDIAN")) 774 return 0; 775 } else 776 pfatal("INTERNAL ERROR: unknown endian"); 777 } 778 if (needswap) 779 pwarn("** Swapped byte order\n"); 780 /* swap SB byte order if asked */ 781 if (doswap) 782 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 783 784 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 785 if (needswap) 786 ffs_sb_swap(sblk.b_un.b_fs, sblock); 787 788 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 789 790 /* 791 * run a few consistency checks of the super block 792 */ 793 if (sblock->fs_sbsize > SBLOCKSIZE) 794 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 795 /* 796 * Compute block size that the filesystem is based on, 797 * according to fsbtodb, and adjust superblock block number 798 * so we can tell if this is an alternate later. 799 */ 800 super *= dev_bsize; 801 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 802 sblk.b_bno = super / dev_bsize; 803 sblk.b_size = SBLOCKSIZE; 804 if (bflag) 805 goto out; 806 /* 807 * Set all possible fields that could differ, then do check 808 * of whole super block against an alternate super block-> 809 * When an alternate super-block is specified this check is skipped. 810 */ 811 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 812 if (asblk.b_errs) 813 return (0); 814 /* swap SB byte order if asked */ 815 if (doswap) 816 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 817 818 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 819 if (needswap) 820 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 821 if (cmpsblks(sblock, altsblock)) { 822 if (debug) { 823 uint32_t *nlp, *olp, *endlp; 824 825 printf("superblock mismatches\n"); 826 nlp = (uint32_t *)altsblock; 827 olp = (uint32_t *)sblock; 828 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 829 for ( ; olp < endlp; olp++, nlp++) { 830 if (*olp == *nlp) 831 continue; 832 printf("offset %#x, original 0x%08x, alternate " 833 "0x%08x\n", 834 (int)((uint8_t *)olp-(uint8_t *)sblock), 835 *olp, *nlp); 836 } 837 } 838 badsb(listerr, 839 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 840 /* 841 return (0); 842 */ 843 } 844 out: 845 846 sb_oldfscompat_read(sblock, &sblocksave); 847 848 /* Now we know the SB is valid, we can write it back if needed */ 849 if (doswap) { 850 sbdirty(); 851 dirty(&asblk); 852 } 853 havesb = 1; 854 return (1); 855 } 856 857 int 858 cmpsblks(const struct fs *sb, struct fs *asb) 859 { 860 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 861 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 862 return cmpsblks42(sb, asb); 863 else 864 return cmpsblks44(sb, asb); 865 } 866 if (asb->fs_sblkno != sb->fs_sblkno || 867 asb->fs_cblkno != sb->fs_cblkno || 868 asb->fs_iblkno != sb->fs_iblkno || 869 asb->fs_dblkno != sb->fs_dblkno || 870 asb->fs_ncg != sb->fs_ncg || 871 asb->fs_bsize != sb->fs_bsize || 872 asb->fs_fsize != sb->fs_fsize || 873 asb->fs_frag != sb->fs_frag || 874 asb->fs_bmask != sb->fs_bmask || 875 asb->fs_fmask != sb->fs_fmask || 876 asb->fs_bshift != sb->fs_bshift || 877 asb->fs_fshift != sb->fs_fshift || 878 asb->fs_fragshift != sb->fs_fragshift || 879 asb->fs_fsbtodb != sb->fs_fsbtodb || 880 asb->fs_sbsize != sb->fs_sbsize || 881 asb->fs_nindir != sb->fs_nindir || 882 asb->fs_inopb != sb->fs_inopb || 883 asb->fs_cssize != sb->fs_cssize || 884 asb->fs_ipg != sb->fs_ipg || 885 asb->fs_fpg != sb->fs_fpg || 886 asb->fs_magic != sb->fs_magic) 887 return 1; 888 return 0; 889 } 890 891 /* BSD 4.2 performed the following superblock comparison 892 * It should correspond to FS_42POSTBLFMT 893 * (although note that in 4.2, the fs_old_postblformat 894 * field didn't exist and the corresponding bits are 895 * located near the end of the postbl itself, where they 896 * are not likely to be used.) 897 */ 898 int 899 cmpsblks42(const struct fs *sb, struct fs *asb) 900 { 901 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 902 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 903 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 904 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 905 asb->fs_cgrotor = sb->fs_cgrotor; 906 asb->fs_fmod = sb->fs_fmod; 907 asb->fs_clean = sb->fs_clean; 908 asb->fs_ronly = sb->fs_ronly; 909 asb->fs_old_flags = sb->fs_old_flags; 910 asb->fs_maxcontig = sb->fs_maxcontig; 911 asb->fs_minfree = sb->fs_minfree; 912 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 913 asb->fs_maxbpg = sb->fs_maxbpg; 914 915 /* The former fs_csp, totaling 128 bytes */ 916 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 917 asb->fs_contigdirs = sb->fs_contigdirs; 918 asb->fs_csp = sb->fs_csp; 919 asb->fs_maxcluster = sb->fs_maxcluster; 920 asb->fs_active = sb->fs_active; 921 922 /* The former fs_fsmnt, totaling 512 bytes */ 923 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 924 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 925 926 return memcmp(sb, asb, sb->fs_sbsize); 927 } 928 929 /* BSD 4.4 performed the following superblock comparison 930 * This was used in NetBSD through 1.6.1 931 * 932 * Note that this implementation is destructive to asb. 933 */ 934 int 935 cmpsblks44(const struct fs *sb, struct fs *asb) 936 { 937 /* 938 * "Copy fields which we don't care if they're different in the 939 * alternate superblocks, as they're either likely to be 940 * different because they're per-cylinder-group specific, or 941 * because they're transient details which are only maintained 942 * in the primary superblock." 943 */ 944 asb->fs_firstfield = sb->fs_firstfield; 945 asb->fs_unused_1 = sb->fs_unused_1; 946 asb->fs_old_time = sb->fs_old_time; 947 asb->fs_old_cstotal = sb->fs_old_cstotal; 948 asb->fs_cgrotor = sb->fs_cgrotor; 949 asb->fs_fmod = sb->fs_fmod; 950 asb->fs_clean = sb->fs_clean; 951 asb->fs_ronly = sb->fs_ronly; 952 asb->fs_old_flags = sb->fs_old_flags; 953 asb->fs_maxcontig = sb->fs_maxcontig; 954 asb->fs_minfree = sb->fs_minfree; 955 asb->fs_optim = sb->fs_optim; 956 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 957 asb->fs_maxbpg = sb->fs_maxbpg; 958 959 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 960 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 961 asb->fs_contigdirs = sb->fs_contigdirs; 962 asb->fs_csp = sb->fs_csp; 963 asb->fs_maxcluster = sb->fs_maxcluster; 964 asb->fs_active = sb->fs_active; 965 966 /* The former fs_fsmnt, totaling 512 bytes */ 967 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 968 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 969 970 /* The former fs_sparecon, totaling 200 bytes */ 971 memmove(asb->fs_snapinum, 972 sb->fs_snapinum, sizeof sb->fs_snapinum); 973 asb->fs_avgfilesize = sb->fs_avgfilesize; 974 asb->fs_avgfpdir = sb->fs_avgfpdir; 975 asb->fs_save_cgsize = sb->fs_save_cgsize; 976 memmove(asb->fs_sparecon32, 977 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 978 asb->fs_flags = sb->fs_flags; 979 980 /* Original comment: 981 * "The following should not have to be copied, but need to be." 982 */ 983 asb->fs_fsbtodb = sb->fs_fsbtodb; 984 asb->fs_old_interleave = sb->fs_old_interleave; 985 asb->fs_old_npsect = sb->fs_old_npsect; 986 asb->fs_old_nrpos = sb->fs_old_nrpos; 987 asb->fs_state = sb->fs_state; 988 asb->fs_qbmask = sb->fs_qbmask; 989 asb->fs_qfmask = sb->fs_qfmask; 990 asb->fs_state = sb->fs_state; 991 asb->fs_maxfilesize = sb->fs_maxfilesize; 992 993 /* 994 * "Compare the superblocks, effectively checking every other 995 * field to see if they differ." 996 */ 997 return memcmp(sb, asb, sb->fs_sbsize); 998 } 999 1000 1001 static void 1002 badsb(int listerr, const char *s) 1003 { 1004 1005 if (!listerr) 1006 return; 1007 if (preen) 1008 printf("%s: ", cdevname()); 1009 pfatal("BAD SUPER BLOCK: %s\n", s); 1010 } 1011 1012 /* 1013 * Calculate a prototype superblock based on information in the disk label. 1014 * When done the cgsblock macro can be calculated and the fs_ncg field 1015 * can be used. Do NOT attempt to use other macros without verifying that 1016 * their needed information is available! 1017 */ 1018 static int 1019 calcsb(const char *dev, int devfd, struct fs *fs) 1020 { 1021 struct dkwedge_info dkw; 1022 struct disk_geom geo; 1023 int i, nspf; 1024 1025 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 1026 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1027 if (dkw.dkw_parent[0] == '\0') { 1028 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1029 return (0); 1030 } 1031 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) && 1032 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS)) { 1033 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 1034 dev, dkw.dkw_ptype); 1035 return (0); 1036 } 1037 if (geo.dg_secsize == 0) { 1038 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 1039 return 0; 1040 } 1041 if (geo.dg_secpercyl == 0) { 1042 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 1043 return 0; 1044 } 1045 if (sblk.b_un.b_fs->fs_fsize == 0) { 1046 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 1047 return 0; 1048 } 1049 if (sblk.b_un.b_fs->fs_fpg == 0) { 1050 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1051 return 0; 1052 } 1053 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1054 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1055 return 0; 1056 } 1057 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1058 nspf = fs->fs_fsize / geo.dg_secsize; 1059 fs->fs_old_nspf = nspf; 1060 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1061 fs->fs_fsbtodb++; 1062 dev_bsize = geo.dg_secsize; 1063 if (fs->fs_magic == FS_UFS2_MAGIC) { 1064 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1065 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1066 fs->fs_old_cgmask = 0xffffffff; 1067 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1068 fs->fs_old_cgmask <<= 1; 1069 if (!POWEROF2(geo.dg_ntracks)) 1070 fs->fs_old_cgmask <<= 1; 1071 fs->fs_old_cgoffset = roundup( 1072 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1073 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1074 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1075 fs->fs_old_cpg); 1076 } 1077 return (1); 1078 } 1079