1 /* $NetBSD: setup.c,v 1.101 2017/02/08 16:11:40 rin 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 1.101 2017/02/08 16:11:40 rin 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 #ifndef NO_APPLE_UFS 74 static int readappleufs(void); 75 #endif 76 77 int16_t sblkpostbl[256]; 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(const char *dev, const char *origdev) 86 { 87 long cg, size, asked, i, j; 88 long bmapsize; 89 struct disk_geom geo; 90 struct dkwedge_info dkw; 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 int fd; 98 99 havesb = 0; 100 fswritefd = -1; 101 doskipclean = skipclean; 102 if (stat(dev, &statb) < 0) { 103 printf("Can't stat %s: %s\n", dev, strerror(errno)); 104 return (0); 105 } 106 if (!forceimage && !S_ISCHR(statb.st_mode)) { 107 pfatal("%s is not a character device", dev); 108 if (reply("CONTINUE") == 0) 109 return (0); 110 } 111 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 112 printf("Can't open %s: %s\n", dev, strerror(errno)); 113 return (0); 114 } 115 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 116 fswritefd = -1; 117 if (preen) 118 pfatal("NO WRITE ACCESS"); 119 printf("** %s (NO WRITE)\n", dev); 120 quiet = 0; 121 } else 122 if (!preen && !quiet) 123 printf("** %s\n", dev); 124 fsmodified = 0; 125 lfdir = 0; 126 initbarea(&sblk); 127 initbarea(&asblk); 128 sblk.b_un.b_buf = malloc(SBLOCKSIZE); 129 sblock = malloc(SBLOCKSIZE); 130 asblk.b_un.b_buf = malloc(SBLOCKSIZE); 131 altsblock = malloc(SBLOCKSIZE); 132 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 133 sblock == NULL || altsblock == NULL) 134 errexit("Cannot allocate space for superblock"); 135 if (strcmp(dev, origdev) && !forceimage) { 136 /* 137 * dev isn't the original fs (for example it's a snapshot) 138 * do getdiskinfo on the original device 139 */ 140 fd = open(origdev, O_RDONLY); 141 if (fd < 0) { 142 warn("Can't open %s", origdev); 143 return (0); 144 } 145 } else { 146 fd = fsreadfd; 147 } 148 if (!forceimage && getdiskinfo(origdev, fd, NULL, &geo, &dkw) != -1) 149 dev_bsize = secsize = geo.dg_secsize; 150 else 151 dev_bsize = secsize = DEV_BSIZE; 152 /* 153 * Read in the superblock, looking for alternates if necessary 154 */ 155 if (readsb(1) == 0) { 156 if (bflag || preen || forceimage || 157 calcsb(dev, fsreadfd, &proto) == 0) 158 return(0); 159 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 160 return (0); 161 for (cg = 0; cg < proto.fs_ncg; cg++) { 162 bflag = FFS_FSBTODB(&proto, cgsblock(&proto, cg)); 163 if (readsb(0) != 0) 164 break; 165 } 166 if (cg >= proto.fs_ncg) { 167 printf("%s %s\n%s %s\n%s %s\n", 168 "SEARCH FOR ALTERNATE SUPER-BLOCK", 169 "FAILED. YOU MUST USE THE", 170 "-b OPTION TO fsck_ffs TO SPECIFY THE", 171 "LOCATION OF AN ALTERNATE", 172 "SUPER-BLOCK TO SUPPLY NEEDED", 173 "INFORMATION; SEE fsck_ffs(8)."); 174 return(0); 175 } 176 doskipclean = 0; 177 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 178 } 179 180 if (!quota2_check_doquota()) 181 doskipclean = 0; 182 183 /* ffs_superblock_layout() == 2 */ 184 if (sblock->fs_magic != FS_UFS1_MAGIC || 185 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) { 186 /* can have WAPBL */ 187 if (check_wapbl() != 0) { 188 doskipclean = 0; 189 } 190 if (sblock->fs_flags & FS_DOWAPBL) { 191 if (preen && doskipclean) { 192 if (!quiet) 193 pwarn("file system is journaled; " 194 "not checking\n"); 195 return (-1); 196 } 197 if (!quiet) 198 pwarn("** File system is journaled; " 199 "replaying journal\n"); 200 replay_wapbl(); 201 doskipclean = 0; 202 sblock->fs_flags &= ~FS_DOWAPBL; 203 sbdirty(); 204 /* Although we may have updated the superblock from 205 * the journal, we are still going to do a full check, 206 * so we don't bother to re-read the superblock from 207 * the journal. 208 * XXX, instead we could re-read the superblock and 209 * then not force doskipclean = 0 210 */ 211 } 212 } 213 if (debug) 214 printf("clean = %d\n", sblock->fs_clean); 215 216 if (doswap) 217 doskipclean = 0; 218 219 if (sblock->fs_clean & FS_ISCLEAN) { 220 if (doskipclean) { 221 if (!quiet) 222 pwarn("%sile system is clean; not checking\n", 223 preen ? "f" : "** F"); 224 return (-1); 225 } 226 if (!preen && !doswap) 227 pwarn("** File system is already clean\n"); 228 } 229 maxfsblock = sblock->fs_size; 230 maxino = sblock->fs_ncg * sblock->fs_ipg; 231 sizepb = sblock->fs_bsize; 232 maxfilesize = sblock->fs_bsize * UFS_NDADDR - 1; 233 for (i = 0; i < UFS_NIADDR; i++) { 234 sizepb *= FFS_NINDIR(sblock); 235 maxfilesize += sizepb; 236 } 237 if ((!is_ufs2 && cvtlevel >= 4) && 238 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 239 if (preen) 240 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 241 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 242 return(0); 243 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 244 /* Disable the postbl tables */ 245 sblock->fs_old_cpc = 0; 246 sblock->fs_old_nrpos = 1; 247 sblock->fs_old_trackskew = 0; 248 /* The other fields have already been updated by 249 * sb_oldfscompat_read 250 */ 251 sbdirty(); 252 } 253 if (!is_ufs2 && cvtlevel == 3 && 254 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 255 if (preen) 256 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 257 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 258 return(0); 259 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 260 sb_oldfscompat_write(sblock, sblock); 261 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 262 /* Leave postbl tables disabled, but blank its superblock region anyway */ 263 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 264 sblock->fs_old_cpc = 0; 265 sblock->fs_old_nrpos = 1; 266 sblock->fs_old_trackskew = 0; 267 memset(&sblock->fs_old_postbl_start, 0xff, 256); 268 sb_oldfscompat_read(sblock, &sblocksave); 269 sbdirty(); 270 } 271 /* 272 * Check and potentially fix certain fields in the super block. 273 */ 274 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 275 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 276 if (reply("CLEAR") == 1) { 277 sblock->fs_flags &= FS_KNOWN_FLAGS; 278 sbdirty(); 279 } 280 } 281 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 282 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 283 if (reply("SET TO DEFAULT") == 1) { 284 sblock->fs_optim = FS_OPTTIME; 285 sbdirty(); 286 } 287 } 288 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 289 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 290 sblock->fs_minfree); 291 if (reply("SET TO DEFAULT") == 1) { 292 sblock->fs_minfree = 10; 293 sbdirty(); 294 } 295 } 296 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 297 (sblock->fs_old_interleave < 1 || 298 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 299 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 300 sblock->fs_old_interleave); 301 sblock->fs_old_interleave = 1; 302 if (preen) 303 printf(" (FIXED)\n"); 304 if (preen || reply("SET TO DEFAULT") == 1) { 305 sbdirty(); 306 dirty(&asblk); 307 } 308 } 309 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 310 (sblock->fs_old_npsect < sblock->fs_old_nsect || 311 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 312 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 313 sblock->fs_old_npsect); 314 sblock->fs_old_npsect = sblock->fs_old_nsect; 315 if (preen) 316 printf(" (FIXED)\n"); 317 if (preen || reply("SET TO DEFAULT") == 1) { 318 sbdirty(); 319 dirty(&asblk); 320 } 321 } 322 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 323 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 324 sblock->fs_bmask); 325 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 326 if (preen) 327 printf(" (FIXED)\n"); 328 if (preen || reply("FIX") == 1) { 329 sbdirty(); 330 dirty(&asblk); 331 } 332 } 333 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 334 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 335 sblock->fs_fmask); 336 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 337 if (preen) 338 printf(" (FIXED)\n"); 339 if (preen || reply("FIX") == 1) { 340 sbdirty(); 341 dirty(&asblk); 342 } 343 } 344 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) { 345 if (sblock->fs_maxfilesize != maxfilesize) { 346 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 347 (unsigned long long)sblock->fs_maxfilesize); 348 sblock->fs_maxfilesize = maxfilesize; 349 if (preen) 350 printf(" (FIXED)\n"); 351 if (preen || reply("FIX") == 1) { 352 sbdirty(); 353 dirty(&asblk); 354 } 355 } 356 if ((is_ufs2 && sblock->fs_maxsymlinklen != UFS2_MAXSYMLINKLEN) 357 || 358 (!is_ufs2 && sblock->fs_maxsymlinklen != UFS1_MAXSYMLINKLEN)) 359 { 360 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 361 sblock->fs_maxsymlinklen); 362 sblock->fs_maxsymlinklen = is_ufs2 ? 363 UFS2_MAXSYMLINKLEN : UFS1_MAXSYMLINKLEN; 364 if (preen) 365 printf(" (FIXED)\n"); 366 if (preen || reply("FIX") == 1) { 367 sbdirty(); 368 dirty(&asblk); 369 } 370 } 371 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 372 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 373 (unsigned long long)sblock->fs_qbmask); 374 sblock->fs_qbmask = ~sblock->fs_bmask; 375 if (preen) 376 printf(" (FIXED)\n"); 377 if (preen || reply("FIX") == 1) { 378 sbdirty(); 379 dirty(&asblk); 380 } 381 } 382 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 383 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 384 (unsigned long long)sblock->fs_qfmask); 385 sblock->fs_qfmask = ~sblock->fs_fmask; 386 if (preen) 387 printf(" (FIXED)\n"); 388 if (preen || reply("FIX") == 1) { 389 sbdirty(); 390 dirty(&asblk); 391 } 392 } 393 newinofmt = 1; 394 } else { 395 sblock->fs_qbmask = ~sblock->fs_bmask; 396 sblock->fs_qfmask = ~sblock->fs_fmask; 397 newinofmt = 0; 398 } 399 /* 400 * Convert to new inode format. 401 */ 402 if (!is_ufs2 && cvtlevel >= 2 && 403 sblock->fs_old_inodefmt < FS_44INODEFMT) { 404 if (preen) 405 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 406 else if (!reply("CONVERT TO NEW INODE FORMAT")) 407 return(0); 408 doinglevel2++; 409 sblock->fs_old_inodefmt = FS_44INODEFMT; 410 sblock->fs_maxfilesize = maxfilesize; 411 sblock->fs_maxsymlinklen = UFS1_MAXSYMLINKLEN; 412 sblock->fs_qbmask = ~sblock->fs_bmask; 413 sblock->fs_qfmask = ~sblock->fs_fmask; 414 sbdirty(); 415 dirty(&asblk); 416 } 417 /* 418 * Convert to new cylinder group format. 419 */ 420 if (!is_ufs2 && cvtlevel >= 1 && 421 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 422 if (preen) 423 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 424 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 425 return(0); 426 doinglevel1++; 427 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 428 sblock->fs_old_nrpos = 8; 429 sblock->fs_old_postbloff = 430 (char *)(&sblock->fs_old_postbl_start) - 431 (char *)(&sblock->fs_firstfield); 432 sblock->fs_old_rotbloff = 433 (char *)(&sblock->fs_magic+1) - 434 (char *)(&sblock->fs_firstfield); 435 sblock->fs_cgsize = 436 ffs_fragroundup(sblock, CGSIZE(sblock)); 437 sbdirty(); 438 dirty(&asblk); 439 } 440 if (asblk.b_dirty && !bflag) { 441 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 442 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 443 if (needswap) 444 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 445 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 446 flush(fswritefd, &asblk); 447 } 448 /* 449 * read in the summary info. 450 */ 451 asked = 0; 452 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 453 if (sblock->fs_csp == NULL) { 454 pwarn("cannot alloc %u bytes for summary info\n", 455 sblock->fs_cssize); 456 goto badsblabel; 457 } 458 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 459 size = sblock->fs_cssize - i < sblock->fs_bsize ? 460 sblock->fs_cssize - i : sblock->fs_bsize; 461 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 462 if (bread(fsreadfd, (char *)ccsp, 463 FFS_FSBTODB(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 464 size) != 0 && !asked) { 465 pfatal("BAD SUMMARY INFORMATION"); 466 if (reply("CONTINUE") == 0) { 467 markclean = 0; 468 exit(FSCK_EXIT_CHECK_FAILED); 469 } 470 asked++; 471 } 472 if (doswap) { 473 ffs_csum_swap(ccsp, ccsp, size); 474 bwrite(fswritefd, (char *)ccsp, 475 FFS_FSBTODB(sblock, 476 sblock->fs_csaddr + j * sblock->fs_frag), 477 size); 478 } 479 if (needswap) 480 ffs_csum_swap(ccsp, ccsp, size); 481 } 482 /* 483 * allocate and initialize the necessary maps 484 */ 485 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 486 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 487 if (blockmap == NULL) { 488 pwarn("cannot alloc %u bytes for blockmap\n", 489 (unsigned)bmapsize); 490 goto badsblabel; 491 } 492 inostathead = calloc((unsigned)(sblock->fs_ncg), 493 sizeof(struct inostatlist)); 494 if (inostathead == NULL) { 495 pwarn("cannot alloc %u bytes for inostathead\n", 496 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 497 goto badsblabel; 498 } 499 /* 500 * cs_ndir may be inaccurate, particularly if we're using the -b 501 * option, so set a minimum to prevent bogus subdirectory reconnects 502 * and really inefficient directory scans. 503 * Also set a maximum in case the value is too large. 504 */ 505 numdirs = sblock->fs_cstotal.cs_ndir; 506 if (numdirs < 1024) 507 numdirs = 1024; 508 if ((ino_t)numdirs > maxino + 1) 509 numdirs = maxino + 1; 510 dirhash = numdirs; 511 inplast = 0; 512 listmax = numdirs + 10; 513 inpsort = calloc((unsigned)listmax, sizeof(*inpsort)); 514 inphead = calloc((unsigned)numdirs, sizeof(*inphead)); 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 #ifndef NO_APPLE_UFS 533 if (!forceimage && dkw.dkw_parent[0]) 534 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 535 isappleufs = 1; 536 537 if (readappleufs()) 538 isappleufs = 1; 539 #endif 540 541 if (isappleufs) 542 dirblksiz = APPLEUFS_DIRBLKSIZ; 543 else 544 dirblksiz = UFS_DIRBLKSIZ; 545 546 if (debug) 547 #ifndef NO_APPLE_UFS 548 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 549 #else 550 printf("dirblksiz = %d\n", dirblksiz); 551 #endif 552 553 if (sblock->fs_flags & FS_DOQUOTA2) { 554 /* allocate the quota hash table */ 555 /* 556 * first compute the size of the hash table 557 * We know the smallest block size is 4k, so we can use 2k 558 * for the hash table; as an entry is 8 bytes we can store 559 * 256 entries. So let start q2h_hash_shift at 8 560 */ 561 for (q2h_hash_shift = 8; 562 q2h_hash_shift < 15; 563 q2h_hash_shift++) { 564 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 565 sizeof(struct quota2_header) > 566 (size_t)sblock->fs_bsize) 567 break; 568 } 569 q2h_hash_mask = (1 << q2h_hash_shift) - 1; 570 if (debug) { 571 printf("quota hash shift %d, %d entries, mask 0x%x\n", 572 q2h_hash_shift, (1 << q2h_hash_shift), 573 q2h_hash_mask); 574 } 575 uquot_user_hash = 576 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 577 uquot_group_hash = 578 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 579 if (uquot_user_hash == NULL || uquot_group_hash == NULL) 580 errexit("Cannot allocate space for quotas hash\n"); 581 } else { 582 uquot_user_hash = uquot_group_hash = NULL; 583 q2h_hash_shift = q2h_hash_mask = 0; 584 } 585 return (1); 586 badsblabel: 587 markclean=0; 588 ckfini(1); 589 return (0); 590 } 591 592 #ifndef NO_APPLE_UFS 593 static int 594 readappleufs(void) 595 { 596 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 597 struct appleufslabel *appleufs; 598 int i; 599 600 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 601 * being block aligned (CD's?) 602 */ 603 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0) 604 return 0; 605 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 606 (long)APPLEUFS_LABEL_SIZE) != 0) 607 return 0; 608 appleufsblk.b_bno = label; 609 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 610 611 appleufs = appleufsblk.b_un.b_appleufs; 612 613 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 614 if (!isappleufs) { 615 return 0; 616 } else { 617 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 618 if (reply("FIX") == 0) { 619 return 1; 620 } 621 ffs_appleufs_set(appleufs, NULL, -1, 0); 622 appleufsdirty(); 623 } 624 } 625 626 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 627 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 628 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 629 if (preen) { 630 printf(" (CORRECTED)\n"); 631 } 632 if (preen || reply("CORRECT")) { 633 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 634 appleufsdirty(); 635 } 636 } 637 638 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 639 pwarn("APPLE UFS LABEL NAME TOO LONG"); 640 if (preen) { 641 printf(" (TRUNCATED)\n"); 642 } 643 if (preen || reply("TRUNCATE")) { 644 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 645 appleufsdirty(); 646 } 647 } 648 649 if (ntohs(appleufs->ul_namelen) == 0) { 650 pwarn("MISSING APPLE UFS LABEL NAME"); 651 if (preen) { 652 printf(" (FIXED)\n"); 653 } 654 if (preen || reply("FIX")) { 655 ffs_appleufs_set(appleufs, NULL, -1, 0); 656 appleufsdirty(); 657 } 658 } 659 660 /* Scan name for first illegal character */ 661 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 662 if ((appleufs->ul_name[i] == '\0') || 663 (appleufs->ul_name[i] == ':') || 664 (appleufs->ul_name[i] == '/')) { 665 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 666 if (preen) { 667 printf(" (TRUNCATED)\n"); 668 } 669 if (preen || reply("TRUNCATE")) { 670 appleufs->ul_namelen = i+1; 671 appleufsdirty(); 672 } 673 break; 674 } 675 } 676 677 /* Check the checksum last, because if anything else was wrong, 678 * then the checksum gets reset anyway. 679 */ 680 appleufs->ul_checksum = 0; 681 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 682 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 683 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 684 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 685 if (preen) { 686 printf(" (CORRECTED)\n"); 687 } 688 if (preen || reply("CORRECT")) { 689 appleufsdirty(); 690 } else { 691 /* put the incorrect checksum back in place */ 692 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 693 } 694 } 695 return 1; 696 } 697 #endif /* !NO_APPLE_UFS */ 698 699 /* 700 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 701 */ 702 static int 703 detect_byteorder(struct fs *fs, int sblockoff) 704 { 705 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 706 fs->fs_magic == FS_UFS1_MAGIC_SWAPPED)) 707 /* Likely to be the first alternate of a fs with 64k blocks */ 708 return -1; 709 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 710 #ifndef NO_FFS_EI 711 if (endian == 0 || BYTE_ORDER == endian) { 712 needswap = 0; 713 doswap = do_blkswap = do_dirswap = 0; 714 } else { 715 needswap = 1; 716 doswap = do_blkswap = do_dirswap = 1; 717 } 718 #endif 719 return 0; 720 } 721 #ifndef NO_FFS_EI 722 else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED || 723 fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) { 724 if (endian == 0 || BYTE_ORDER != endian) { 725 needswap = 1; 726 doswap = do_blkswap = do_dirswap = 0; 727 } else { 728 needswap = 0; 729 doswap = do_blkswap = do_dirswap = 1; 730 } 731 return 0; 732 } 733 #endif 734 return -1; 735 } 736 737 /* 738 * Possible superblock locations ordered from most to least likely. 739 */ 740 static off_t sblock_try[] = SBLOCKSEARCH; 741 742 /* 743 * Read in the super block and its summary info. 744 */ 745 static int 746 readsb(int listerr) 747 { 748 daddr_t super = 0; 749 struct fs *fs; 750 int i; 751 752 if (bflag) { 753 super = bflag; 754 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 755 (long)SBLOCKSIZE) != 0) 756 return (0); 757 fs = sblk.b_un.b_fs; 758 if (detect_byteorder(fs, -1) < 0) { 759 badsb(listerr, "MAGIC NUMBER WRONG"); 760 return (0); 761 } 762 } else { 763 for (i = 0; sblock_try[i] != -1; i++) { 764 super = sblock_try[i] / dev_bsize; 765 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 766 super, (long)SBLOCKSIZE) != 0) 767 continue; 768 fs = sblk.b_un.b_fs; 769 if (detect_byteorder(fs, sblock_try[i]) == 0) 770 break; 771 } 772 if (sblock_try[i] == -1) { 773 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 774 return (0); 775 } 776 } 777 if (doswap) { 778 if (preen) 779 errx(FSCK_EXIT_USAGE, 780 "Incompatible options -B and -p"); 781 if (nflag) 782 errx(FSCK_EXIT_USAGE, 783 "Incompatible options -B and -n"); 784 if (endian == LITTLE_ENDIAN) { 785 if (!reply("CONVERT TO LITTLE ENDIAN")) 786 return 0; 787 } else if (endian == BIG_ENDIAN) { 788 if (!reply("CONVERT TO BIG ENDIAN")) 789 return 0; 790 } else 791 pfatal("INTERNAL ERROR: unknown endian"); 792 } 793 if (needswap) 794 pwarn("** Swapped byte order\n"); 795 /* swap SB byte order if asked */ 796 if (doswap) 797 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 798 799 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 800 if (needswap) 801 ffs_sb_swap(sblk.b_un.b_fs, sblock); 802 803 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 804 805 /* 806 * run a few consistency checks of the super block 807 */ 808 if (sblock->fs_sbsize > SBLOCKSIZE) 809 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 810 /* 811 * Compute block size that the filesystem is based on, 812 * according to FFS_FSBTODB, and adjust superblock block number 813 * so we can tell if this is an alternate later. 814 */ 815 super *= dev_bsize; 816 dev_bsize = sblock->fs_fsize / FFS_FSBTODB(sblock, 1); 817 sblk.b_bno = super / dev_bsize; 818 sblk.b_size = SBLOCKSIZE; 819 if (bflag) 820 goto out; 821 /* 822 * Set all possible fields that could differ, then do check 823 * of whole super block against an alternate super block-> 824 * When an alternate super-block is specified this check is skipped. 825 */ 826 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 827 if (asblk.b_errs) 828 return (0); 829 /* swap SB byte order if asked */ 830 if (doswap) 831 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 832 833 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 834 if (needswap) 835 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 836 if (cmpsblks(sblock, altsblock)) { 837 if (debug) { 838 uint32_t *nlp, *olp, *endlp; 839 840 printf("superblock mismatches\n"); 841 nlp = (uint32_t *)altsblock; 842 olp = (uint32_t *)sblock; 843 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 844 for ( ; olp < endlp; olp++, nlp++) { 845 if (*olp == *nlp) 846 continue; 847 printf("offset %#x, original 0x%08x, alternate " 848 "0x%08x\n", 849 (int)((uint8_t *)olp-(uint8_t *)sblock), 850 *olp, *nlp); 851 } 852 } 853 badsb(listerr, 854 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 855 /* 856 return (0); 857 */ 858 } 859 out: 860 861 sb_oldfscompat_read(sblock, &sblocksave); 862 863 /* Now we know the SB is valid, we can write it back if needed */ 864 if (doswap) { 865 sbdirty(); 866 dirty(&asblk); 867 } 868 havesb = 1; 869 return (1); 870 } 871 872 int 873 cmpsblks(const struct fs *sb, struct fs *asb) 874 { 875 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 876 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 877 return cmpsblks42(sb, asb); 878 else 879 return cmpsblks44(sb, asb); 880 } 881 if (asb->fs_sblkno != sb->fs_sblkno || 882 asb->fs_cblkno != sb->fs_cblkno || 883 asb->fs_iblkno != sb->fs_iblkno || 884 asb->fs_dblkno != sb->fs_dblkno || 885 asb->fs_ncg != sb->fs_ncg || 886 asb->fs_bsize != sb->fs_bsize || 887 asb->fs_fsize != sb->fs_fsize || 888 asb->fs_frag != sb->fs_frag || 889 asb->fs_bmask != sb->fs_bmask || 890 asb->fs_fmask != sb->fs_fmask || 891 asb->fs_bshift != sb->fs_bshift || 892 asb->fs_fshift != sb->fs_fshift || 893 asb->fs_fragshift != sb->fs_fragshift || 894 asb->fs_fsbtodb != sb->fs_fsbtodb || 895 asb->fs_sbsize != sb->fs_sbsize || 896 asb->fs_nindir != sb->fs_nindir || 897 asb->fs_inopb != sb->fs_inopb || 898 asb->fs_cssize != sb->fs_cssize || 899 asb->fs_ipg != sb->fs_ipg || 900 asb->fs_fpg != sb->fs_fpg || 901 asb->fs_magic != sb->fs_magic) 902 return 1; 903 return 0; 904 } 905 906 /* BSD 4.2 performed the following superblock comparison 907 * It should correspond to FS_42POSTBLFMT 908 * (although note that in 4.2, the fs_old_postblformat 909 * field didn't exist and the corresponding bits are 910 * located near the end of the postbl itself, where they 911 * are not likely to be used.) 912 */ 913 int 914 cmpsblks42(const struct fs *sb, struct fs *asb) 915 { 916 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 917 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 918 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 919 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 920 asb->fs_cgrotor = sb->fs_cgrotor; 921 asb->fs_fmod = sb->fs_fmod; 922 asb->fs_clean = sb->fs_clean; 923 asb->fs_ronly = sb->fs_ronly; 924 asb->fs_old_flags = sb->fs_old_flags; 925 asb->fs_maxcontig = sb->fs_maxcontig; 926 asb->fs_minfree = sb->fs_minfree; 927 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 928 asb->fs_maxbpg = sb->fs_maxbpg; 929 930 /* The former fs_csp, totaling 128 bytes */ 931 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 932 asb->fs_contigdirs = sb->fs_contigdirs; 933 asb->fs_csp = sb->fs_csp; 934 asb->fs_maxcluster = sb->fs_maxcluster; 935 asb->fs_active = sb->fs_active; 936 937 /* The former fs_fsmnt, totaling 512 bytes */ 938 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 939 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 940 941 return memcmp(sb, asb, sb->fs_sbsize); 942 } 943 944 /* BSD 4.4 performed the following superblock comparison 945 * This was used in NetBSD through 1.6.1 946 * 947 * Note that this implementation is destructive to asb. 948 */ 949 int 950 cmpsblks44(const struct fs *sb, struct fs *asb) 951 { 952 /* 953 * "Copy fields which we don't care if they're different in the 954 * alternate superblocks, as they're either likely to be 955 * different because they're per-cylinder-group specific, or 956 * because they're transient details which are only maintained 957 * in the primary superblock." 958 */ 959 asb->fs_firstfield = sb->fs_firstfield; 960 asb->fs_unused_1 = sb->fs_unused_1; 961 asb->fs_old_time = sb->fs_old_time; 962 asb->fs_old_cstotal = sb->fs_old_cstotal; 963 asb->fs_cgrotor = sb->fs_cgrotor; 964 asb->fs_fmod = sb->fs_fmod; 965 asb->fs_clean = sb->fs_clean; 966 asb->fs_ronly = sb->fs_ronly; 967 asb->fs_old_flags = sb->fs_old_flags; 968 asb->fs_maxcontig = sb->fs_maxcontig; 969 asb->fs_minfree = sb->fs_minfree; 970 asb->fs_optim = sb->fs_optim; 971 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 972 asb->fs_maxbpg = sb->fs_maxbpg; 973 974 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 975 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 976 asb->fs_contigdirs = sb->fs_contigdirs; 977 asb->fs_csp = sb->fs_csp; 978 asb->fs_maxcluster = sb->fs_maxcluster; 979 asb->fs_active = sb->fs_active; 980 981 /* The former fs_fsmnt, totaling 512 bytes */ 982 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 983 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 984 985 /* The former fs_sparecon, totaling 200 bytes */ 986 memmove(asb->fs_snapinum, 987 sb->fs_snapinum, sizeof sb->fs_snapinum); 988 asb->fs_avgfilesize = sb->fs_avgfilesize; 989 asb->fs_avgfpdir = sb->fs_avgfpdir; 990 asb->fs_save_cgsize = sb->fs_save_cgsize; 991 memmove(asb->fs_sparecon32, 992 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 993 asb->fs_flags = sb->fs_flags; 994 995 /* Original comment: 996 * "The following should not have to be copied, but need to be." 997 */ 998 asb->fs_fsbtodb = sb->fs_fsbtodb; 999 asb->fs_old_interleave = sb->fs_old_interleave; 1000 asb->fs_old_npsect = sb->fs_old_npsect; 1001 asb->fs_old_nrpos = sb->fs_old_nrpos; 1002 asb->fs_state = sb->fs_state; 1003 asb->fs_qbmask = sb->fs_qbmask; 1004 asb->fs_qfmask = sb->fs_qfmask; 1005 asb->fs_state = sb->fs_state; 1006 asb->fs_maxfilesize = sb->fs_maxfilesize; 1007 1008 /* 1009 * "Compare the superblocks, effectively checking every other 1010 * field to see if they differ." 1011 */ 1012 return memcmp(sb, asb, sb->fs_sbsize); 1013 } 1014 1015 1016 static void 1017 badsb(int listerr, const char *s) 1018 { 1019 1020 if (!listerr) 1021 return; 1022 if (preen) 1023 printf("%s: ", cdevname()); 1024 pfatal("BAD SUPER BLOCK: %s\n", s); 1025 } 1026 1027 /* 1028 * Calculate a prototype superblock based on information in the disk label. 1029 * When done the cgsblock macro can be calculated and the fs_ncg field 1030 * can be used. Do NOT attempt to use other macros without verifying that 1031 * their needed information is available! 1032 */ 1033 static int 1034 calcsb(const char *dev, int devfd, struct fs *fs) 1035 { 1036 struct dkwedge_info dkw; 1037 struct disk_geom geo; 1038 int i, nspf; 1039 1040 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 1041 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1042 if (dkw.dkw_parent[0] == '\0') { 1043 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1044 return (0); 1045 } 1046 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) 1047 #ifndef NO_APPLE_UFS 1048 && strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) 1049 #endif 1050 ) { 1051 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 1052 dev, dkw.dkw_ptype); 1053 return (0); 1054 } 1055 if (geo.dg_secsize == 0) { 1056 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 1057 return 0; 1058 } 1059 if (geo.dg_secpercyl == 0) { 1060 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 1061 return 0; 1062 } 1063 if (sblk.b_un.b_fs->fs_fsize == 0) { 1064 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 1065 return 0; 1066 } 1067 if (sblk.b_un.b_fs->fs_fpg == 0) { 1068 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1069 return 0; 1070 } 1071 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1072 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1073 return 0; 1074 } 1075 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1076 nspf = fs->fs_fsize / geo.dg_secsize; 1077 fs->fs_old_nspf = nspf; 1078 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1079 fs->fs_fsbtodb++; 1080 dev_bsize = geo.dg_secsize; 1081 if (fs->fs_magic == FS_UFS2_MAGIC) { 1082 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1083 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1084 fs->fs_old_cgmask = 0xffffffff; 1085 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1086 fs->fs_old_cgmask <<= 1; 1087 if (!POWEROF2(geo.dg_ntracks)) 1088 fs->fs_old_cgmask <<= 1; 1089 fs->fs_old_cgoffset = roundup( 1090 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1091 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1092 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1093 fs->fs_old_cpg); 1094 } 1095 return (1); 1096 } 1097