setup.c revision 1.90.2.1
1 /* $NetBSD: setup.c,v 1.90.2.1 2011/01/20 14:24:54 bouyer 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 1.90.2.1 2011/01/20 14:24:54 bouyer 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 /* ffs_superblock_layout() == 2 */ 178 if (sblock->fs_magic != FS_UFS1_MAGIC || 179 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) { 180 /* can have WAPBL */ 181 if (check_wapbl() != 0) { 182 doskipclean = 0; 183 } 184 if (sblock->fs_flags & FS_DOWAPBL) { 185 if (preen && skipclean) { 186 if (!quiet) 187 pwarn("file system is journaled; " 188 "not checking\n"); 189 return (-1); 190 } 191 if (!quiet) 192 pwarn("** File system is journaled; " 193 "replaying journal\n"); 194 replay_wapbl(); 195 doskipclean = 0; 196 sblock->fs_flags &= ~FS_DOWAPBL; 197 sbdirty(); 198 /* Although we may have updated the superblock from 199 * the journal, we are still going to do a full check, 200 * so we don't bother to re-read the superblock from 201 * the journal. 202 * XXX, instead we could re-read the superblock and 203 * then not force doskipclean = 0 204 */ 205 } 206 } 207 if (debug) 208 printf("clean = %d\n", sblock->fs_clean); 209 210 if (doswap) 211 doskipclean = 0; 212 213 if (!quota2_check_doquota()) 214 doskipclean = 0; 215 216 if (sblock->fs_clean & FS_ISCLEAN) { 217 if (doskipclean) { 218 if (!quiet) 219 pwarn("%sile system is clean; not checking\n", 220 preen ? "f" : "** F"); 221 return (-1); 222 } 223 if (!preen && !doswap) 224 pwarn("** File system is already clean\n"); 225 } 226 maxfsblock = sblock->fs_size; 227 maxino = sblock->fs_ncg * sblock->fs_ipg; 228 sizepb = sblock->fs_bsize; 229 maxfilesize = sblock->fs_bsize * NDADDR - 1; 230 for (i = 0; i < NIADDR; i++) { 231 sizepb *= NINDIR(sblock); 232 maxfilesize += sizepb; 233 } 234 if ((!is_ufs2 && cvtlevel >= 4) && 235 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 236 if (preen) 237 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 238 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 239 return(0); 240 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 241 /* Disable the postbl tables */ 242 sblock->fs_old_cpc = 0; 243 sblock->fs_old_nrpos = 1; 244 sblock->fs_old_trackskew = 0; 245 /* The other fields have already been updated by 246 * sb_oldfscompat_read 247 */ 248 sbdirty(); 249 } 250 if (!is_ufs2 && cvtlevel == 3 && 251 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 252 if (preen) 253 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 254 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 255 return(0); 256 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 257 sb_oldfscompat_write(sblock, sblock); 258 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 259 /* Leave postbl tables disabled, but blank its superblock region anyway */ 260 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 261 sblock->fs_old_cpc = 0; 262 sblock->fs_old_nrpos = 1; 263 sblock->fs_old_trackskew = 0; 264 memset(&sblock->fs_old_postbl_start, 0xff, 256); 265 sb_oldfscompat_read(sblock, &sblocksave); 266 sbdirty(); 267 } 268 /* 269 * Check and potentially fix certain fields in the super block. 270 */ 271 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 272 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 273 if (reply("CLEAR") == 1) { 274 sblock->fs_flags &= FS_KNOWN_FLAGS; 275 sbdirty(); 276 } 277 } 278 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 279 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 280 if (reply("SET TO DEFAULT") == 1) { 281 sblock->fs_optim = FS_OPTTIME; 282 sbdirty(); 283 } 284 } 285 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 286 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 287 sblock->fs_minfree); 288 if (reply("SET TO DEFAULT") == 1) { 289 sblock->fs_minfree = 10; 290 sbdirty(); 291 } 292 } 293 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 294 (sblock->fs_old_interleave < 1 || 295 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 296 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 297 sblock->fs_old_interleave); 298 sblock->fs_old_interleave = 1; 299 if (preen) 300 printf(" (FIXED)\n"); 301 if (preen || reply("SET TO DEFAULT") == 1) { 302 sbdirty(); 303 dirty(&asblk); 304 } 305 } 306 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 307 (sblock->fs_old_npsect < sblock->fs_old_nsect || 308 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 309 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 310 sblock->fs_old_npsect); 311 sblock->fs_old_npsect = sblock->fs_old_nsect; 312 if (preen) 313 printf(" (FIXED)\n"); 314 if (preen || reply("SET TO DEFAULT") == 1) { 315 sbdirty(); 316 dirty(&asblk); 317 } 318 } 319 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 320 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 321 sblock->fs_bmask); 322 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 323 if (preen) 324 printf(" (FIXED)\n"); 325 if (preen || reply("FIX") == 1) { 326 sbdirty(); 327 dirty(&asblk); 328 } 329 } 330 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 331 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 332 sblock->fs_fmask); 333 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 334 if (preen) 335 printf(" (FIXED)\n"); 336 if (preen || reply("FIX") == 1) { 337 sbdirty(); 338 dirty(&asblk); 339 } 340 } 341 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) { 342 if (sblock->fs_maxfilesize != maxfilesize) { 343 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 344 (unsigned long long)sblock->fs_maxfilesize); 345 sblock->fs_maxfilesize = maxfilesize; 346 if (preen) 347 printf(" (FIXED)\n"); 348 if (preen || reply("FIX") == 1) { 349 sbdirty(); 350 dirty(&asblk); 351 } 352 } 353 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2) 354 || 355 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1)) 356 { 357 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 358 sblock->fs_maxsymlinklen); 359 sblock->fs_maxsymlinklen = is_ufs2 ? 360 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1; 361 if (preen) 362 printf(" (FIXED)\n"); 363 if (preen || reply("FIX") == 1) { 364 sbdirty(); 365 dirty(&asblk); 366 } 367 } 368 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 369 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 370 (unsigned long long)sblock->fs_qbmask); 371 sblock->fs_qbmask = ~sblock->fs_bmask; 372 if (preen) 373 printf(" (FIXED)\n"); 374 if (preen || reply("FIX") == 1) { 375 sbdirty(); 376 dirty(&asblk); 377 } 378 } 379 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 380 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 381 (unsigned long long)sblock->fs_qfmask); 382 sblock->fs_qfmask = ~sblock->fs_fmask; 383 if (preen) 384 printf(" (FIXED)\n"); 385 if (preen || reply("FIX") == 1) { 386 sbdirty(); 387 dirty(&asblk); 388 } 389 } 390 newinofmt = 1; 391 } else { 392 sblock->fs_qbmask = ~sblock->fs_bmask; 393 sblock->fs_qfmask = ~sblock->fs_fmask; 394 newinofmt = 0; 395 } 396 /* 397 * Convert to new inode format. 398 */ 399 if (!is_ufs2 && cvtlevel >= 2 && 400 sblock->fs_old_inodefmt < FS_44INODEFMT) { 401 if (preen) 402 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 403 else if (!reply("CONVERT TO NEW INODE FORMAT")) 404 return(0); 405 doinglevel2++; 406 sblock->fs_old_inodefmt = FS_44INODEFMT; 407 sblock->fs_maxfilesize = maxfilesize; 408 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; 409 sblock->fs_qbmask = ~sblock->fs_bmask; 410 sblock->fs_qfmask = ~sblock->fs_fmask; 411 sbdirty(); 412 dirty(&asblk); 413 } 414 /* 415 * Convert to new cylinder group format. 416 */ 417 if (!is_ufs2 && cvtlevel >= 1 && 418 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 419 if (preen) 420 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 421 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 422 return(0); 423 doinglevel1++; 424 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 425 sblock->fs_old_nrpos = 8; 426 sblock->fs_old_postbloff = 427 (char *)(&sblock->fs_old_postbl_start) - 428 (char *)(&sblock->fs_firstfield); 429 sblock->fs_old_rotbloff = 430 (char *)(&sblock->fs_magic+1) - 431 (char *)(&sblock->fs_firstfield); 432 sblock->fs_cgsize = 433 fragroundup(sblock, CGSIZE(sblock)); 434 sbdirty(); 435 dirty(&asblk); 436 } 437 if (asblk.b_dirty && !bflag) { 438 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 439 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 440 if (needswap) 441 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 442 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 443 flush(fswritefd, &asblk); 444 } 445 /* 446 * read in the summary info. 447 */ 448 asked = 0; 449 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 450 if (sblock->fs_csp == NULL) { 451 pwarn("cannot alloc %u bytes for summary info\n", 452 sblock->fs_cssize); 453 goto badsblabel; 454 } 455 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 456 size = sblock->fs_cssize - i < sblock->fs_bsize ? 457 sblock->fs_cssize - i : sblock->fs_bsize; 458 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 459 if (bread(fsreadfd, (char *)ccsp, 460 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 461 size) != 0 && !asked) { 462 pfatal("BAD SUMMARY INFORMATION"); 463 if (reply("CONTINUE") == 0) { 464 markclean = 0; 465 exit(FSCK_EXIT_CHECK_FAILED); 466 } 467 asked++; 468 } 469 if (doswap) { 470 ffs_csum_swap(ccsp, ccsp, size); 471 bwrite(fswritefd, (char *)ccsp, 472 fsbtodb(sblock, 473 sblock->fs_csaddr + j * sblock->fs_frag), 474 size); 475 } 476 if (needswap) 477 ffs_csum_swap(ccsp, ccsp, size); 478 } 479 /* 480 * allocate and initialize the necessary maps 481 */ 482 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 483 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 484 if (blockmap == NULL) { 485 pwarn("cannot alloc %u bytes for blockmap\n", 486 (unsigned)bmapsize); 487 goto badsblabel; 488 } 489 inostathead = calloc((unsigned)(sblock->fs_ncg), 490 sizeof(struct inostatlist)); 491 if (inostathead == NULL) { 492 pwarn("cannot alloc %u bytes for inostathead\n", 493 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 494 goto badsblabel; 495 } 496 /* 497 * cs_ndir may be inaccurate, particularly if we're using the -b 498 * option, so set a minimum to prevent bogus subdirectory reconnects 499 * and really inefficient directory scans. 500 * Also set a maximum in case the value is too large. 501 */ 502 numdirs = sblock->fs_cstotal.cs_ndir; 503 if (numdirs < 1024) 504 numdirs = 1024; 505 if (numdirs > maxino + 1) 506 numdirs = maxino + 1; 507 dirhash = numdirs; 508 inplast = 0; 509 listmax = numdirs + 10; 510 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 511 sizeof(struct inoinfo *)); 512 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 513 sizeof(struct inoinfo *)); 514 if (inpsort == NULL || inphead == NULL) { 515 pwarn("cannot alloc %u bytes for inphead\n", 516 (unsigned)(numdirs * sizeof(struct inoinfo *))); 517 goto badsblabel; 518 } 519 cgrp = malloc(sblock->fs_cgsize); 520 if (cgrp == NULL) { 521 pwarn("cannot alloc %u bytes for cylinder group\n", 522 sblock->fs_cgsize); 523 goto badsblabel; 524 } 525 bufinit(); 526 if (sblock->fs_flags & FS_DOSOFTDEP) 527 usedsoftdep = 1; 528 else 529 usedsoftdep = 0; 530 531 if (!forceimage && dkw.dkw_parent[0]) 532 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 533 isappleufs = 1; 534 535 if (readappleufs()) 536 isappleufs = 1; 537 538 dirblksiz = DIRBLKSIZ; 539 if (isappleufs) 540 dirblksiz = APPLEUFS_DIRBLKSIZ; 541 542 if (debug) 543 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 544 545 if (sblock->fs_flags & FS_DOQUOTA2) { 546 /* allocate the quota hash table */ 547 /* 548 * first compute the size of the hash table 549 * We know the smallest block size is 4k, so we can use 2k 550 * for the hash table; as an entry is 8 bytes we can store 551 * 256 entries. So let start q2h_hash_shift at 8 552 */ 553 for (q2h_hash_shift = 8; 554 q2h_hash_shift < 15; 555 q2h_hash_shift++) { 556 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 557 sizeof(struct quota2_header) > sblock->fs_bsize) 558 break; 559 } 560 q2h_hash_mask = (1 << q2h_hash_shift) - 1; 561 if (debug) { 562 printf("quota hash shift %d, %d entries, mask 0x%x\n", 563 q2h_hash_shift, (1 << q2h_hash_shift), 564 q2h_hash_mask); 565 } 566 uquot_user_hash = 567 malloc((1 << q2h_hash_shift) * sizeof(struct uquot_hash)); 568 uquot_group_hash = 569 malloc((1 << q2h_hash_shift) * sizeof(struct uquot_hash)); 570 if (uquot_user_hash == NULL || uquot_group_hash == NULL) 571 errexit("Cannot allocate space for quotas hash\n"); 572 } else { 573 uquot_user_hash = uquot_group_hash = NULL; 574 q2h_hash_shift = q2h_hash_mask = 0; 575 } 576 return (1); 577 badsblabel: 578 markclean=0; 579 ckfini(); 580 return (0); 581 } 582 583 static int 584 readappleufs(void) 585 { 586 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 587 struct appleufslabel *appleufs; 588 int i; 589 590 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 591 * being block aligned (CD's?) 592 */ 593 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0) 594 return 0; 595 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 596 (long)APPLEUFS_LABEL_SIZE) != 0) 597 return 0; 598 appleufsblk.b_bno = label; 599 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 600 601 appleufs = appleufsblk.b_un.b_appleufs; 602 603 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 604 if (!isappleufs) { 605 return 0; 606 } else { 607 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 608 if (reply("FIX") == 0) { 609 return 1; 610 } 611 ffs_appleufs_set(appleufs, NULL, -1, 0); 612 appleufsdirty(); 613 } 614 } 615 616 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 617 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 618 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 619 if (preen) { 620 printf(" (CORRECTED)\n"); 621 } 622 if (preen || reply("CORRECT")) { 623 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 624 appleufsdirty(); 625 } 626 } 627 628 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 629 pwarn("APPLE UFS LABEL NAME TOO LONG"); 630 if (preen) { 631 printf(" (TRUNCATED)\n"); 632 } 633 if (preen || reply("TRUNCATE")) { 634 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 635 appleufsdirty(); 636 } 637 } 638 639 if (ntohs(appleufs->ul_namelen) == 0) { 640 pwarn("MISSING APPLE UFS LABEL NAME"); 641 if (preen) { 642 printf(" (FIXED)\n"); 643 } 644 if (preen || reply("FIX")) { 645 ffs_appleufs_set(appleufs, NULL, -1, 0); 646 appleufsdirty(); 647 } 648 } 649 650 /* Scan name for first illegal character */ 651 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 652 if ((appleufs->ul_name[i] == '\0') || 653 (appleufs->ul_name[i] == ':') || 654 (appleufs->ul_name[i] == '/')) { 655 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 656 if (preen) { 657 printf(" (TRUNCATED)\n"); 658 } 659 if (preen || reply("TRUNCATE")) { 660 appleufs->ul_namelen = i+1; 661 appleufsdirty(); 662 } 663 break; 664 } 665 } 666 667 /* Check the checksum last, because if anything else was wrong, 668 * then the checksum gets reset anyway. 669 */ 670 appleufs->ul_checksum = 0; 671 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 672 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 673 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 674 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 675 if (preen) { 676 printf(" (CORRECTED)\n"); 677 } 678 if (preen || reply("CORRECT")) { 679 appleufsdirty(); 680 } else { 681 /* put the incorrect checksum back in place */ 682 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 683 } 684 } 685 return 1; 686 } 687 688 /* 689 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 690 */ 691 static int 692 detect_byteorder(struct fs *fs, int sblockoff) 693 { 694 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 695 fs->fs_magic == bswap32(FS_UFS1_MAGIC))) 696 /* Likely to be the first alternate of a fs with 64k blocks */ 697 return -1; 698 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 699 if (endian == 0 || BYTE_ORDER == endian) { 700 needswap = 0; 701 doswap = do_blkswap = do_dirswap = 0; 702 } else { 703 needswap = 1; 704 doswap = do_blkswap = do_dirswap = 1; 705 } 706 return 0; 707 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) || 708 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) { 709 if (endian == 0 || BYTE_ORDER != endian) { 710 needswap = 1; 711 doswap = do_blkswap = do_dirswap = 0; 712 } else { 713 needswap = 0; 714 doswap = do_blkswap = do_dirswap = 1; 715 } 716 return 0; 717 } 718 return -1; 719 } 720 721 /* 722 * Possible superblock locations ordered from most to least likely. 723 */ 724 static off_t sblock_try[] = SBLOCKSEARCH; 725 726 /* 727 * Read in the super block and its summary info. 728 */ 729 static int 730 readsb(int listerr) 731 { 732 daddr_t super = 0; 733 struct fs *fs; 734 int i; 735 736 if (bflag) { 737 super = bflag; 738 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 739 (long)SBLOCKSIZE) != 0) 740 return (0); 741 fs = sblk.b_un.b_fs; 742 if (detect_byteorder(fs, -1) < 0) { 743 badsb(listerr, "MAGIC NUMBER WRONG"); 744 return (0); 745 } 746 } else { 747 for (i = 0; sblock_try[i] != -1; i++) { 748 super = sblock_try[i] / dev_bsize; 749 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 750 super, (long)SBLOCKSIZE) != 0) 751 continue; 752 fs = sblk.b_un.b_fs; 753 if (detect_byteorder(fs, sblock_try[i]) == 0) 754 break; 755 } 756 if (sblock_try[i] == -1) { 757 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 758 return (0); 759 } 760 } 761 if (doswap) { 762 if (preen) 763 errx(FSCK_EXIT_USAGE, 764 "Incompatible options -B and -p"); 765 if (nflag) 766 errx(FSCK_EXIT_USAGE, 767 "Incompatible options -B and -n"); 768 if (endian == LITTLE_ENDIAN) { 769 if (!reply("CONVERT TO LITTLE ENDIAN")) 770 return 0; 771 } else if (endian == BIG_ENDIAN) { 772 if (!reply("CONVERT TO BIG ENDIAN")) 773 return 0; 774 } else 775 pfatal("INTERNAL ERROR: unknown endian"); 776 } 777 if (needswap) 778 pwarn("** Swapped byte order\n"); 779 /* swap SB byte order if asked */ 780 if (doswap) 781 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 782 783 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 784 if (needswap) 785 ffs_sb_swap(sblk.b_un.b_fs, sblock); 786 787 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 788 789 /* 790 * run a few consistency checks of the super block 791 */ 792 if (sblock->fs_sbsize > SBLOCKSIZE) 793 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 794 /* 795 * Compute block size that the filesystem is based on, 796 * according to fsbtodb, and adjust superblock block number 797 * so we can tell if this is an alternate later. 798 */ 799 super *= dev_bsize; 800 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 801 sblk.b_bno = super / dev_bsize; 802 sblk.b_size = SBLOCKSIZE; 803 if (bflag) 804 goto out; 805 /* 806 * Set all possible fields that could differ, then do check 807 * of whole super block against an alternate super block-> 808 * When an alternate super-block is specified this check is skipped. 809 */ 810 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 811 if (asblk.b_errs) 812 return (0); 813 /* swap SB byte order if asked */ 814 if (doswap) 815 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 816 817 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 818 if (needswap) 819 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 820 if (cmpsblks(sblock, altsblock)) { 821 if (debug) { 822 uint32_t *nlp, *olp, *endlp; 823 824 printf("superblock mismatches\n"); 825 nlp = (uint32_t *)altsblock; 826 olp = (uint32_t *)sblock; 827 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 828 for ( ; olp < endlp; olp++, nlp++) { 829 if (*olp == *nlp) 830 continue; 831 printf("offset %#x, original 0x%08x, alternate " 832 "0x%08x\n", 833 (int)((uint8_t *)olp-(uint8_t *)sblock), 834 *olp, *nlp); 835 } 836 } 837 badsb(listerr, 838 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 839 /* 840 return (0); 841 */ 842 } 843 out: 844 845 sb_oldfscompat_read(sblock, &sblocksave); 846 847 /* Now we know the SB is valid, we can write it back if needed */ 848 if (doswap) { 849 sbdirty(); 850 dirty(&asblk); 851 } 852 havesb = 1; 853 return (1); 854 } 855 856 int 857 cmpsblks(const struct fs *sb, struct fs *asb) 858 { 859 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 860 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 861 return cmpsblks42(sb, asb); 862 else 863 return cmpsblks44(sb, asb); 864 } 865 if (asb->fs_sblkno != sb->fs_sblkno || 866 asb->fs_cblkno != sb->fs_cblkno || 867 asb->fs_iblkno != sb->fs_iblkno || 868 asb->fs_dblkno != sb->fs_dblkno || 869 asb->fs_ncg != sb->fs_ncg || 870 asb->fs_bsize != sb->fs_bsize || 871 asb->fs_fsize != sb->fs_fsize || 872 asb->fs_frag != sb->fs_frag || 873 asb->fs_bmask != sb->fs_bmask || 874 asb->fs_fmask != sb->fs_fmask || 875 asb->fs_bshift != sb->fs_bshift || 876 asb->fs_fshift != sb->fs_fshift || 877 asb->fs_fragshift != sb->fs_fragshift || 878 asb->fs_fsbtodb != sb->fs_fsbtodb || 879 asb->fs_sbsize != sb->fs_sbsize || 880 asb->fs_nindir != sb->fs_nindir || 881 asb->fs_inopb != sb->fs_inopb || 882 asb->fs_cssize != sb->fs_cssize || 883 asb->fs_ipg != sb->fs_ipg || 884 asb->fs_fpg != sb->fs_fpg || 885 asb->fs_magic != sb->fs_magic) 886 return 1; 887 return 0; 888 } 889 890 /* BSD 4.2 performed the following superblock comparison 891 * It should correspond to FS_42POSTBLFMT 892 * (although note that in 4.2, the fs_old_postblformat 893 * field didn't exist and the corresponding bits are 894 * located near the end of the postbl itself, where they 895 * are not likely to be used.) 896 */ 897 int 898 cmpsblks42(const struct fs *sb, struct fs *asb) 899 { 900 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 901 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 902 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 903 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 904 asb->fs_cgrotor = sb->fs_cgrotor; 905 asb->fs_fmod = sb->fs_fmod; 906 asb->fs_clean = sb->fs_clean; 907 asb->fs_ronly = sb->fs_ronly; 908 asb->fs_old_flags = sb->fs_old_flags; 909 asb->fs_maxcontig = sb->fs_maxcontig; 910 asb->fs_minfree = sb->fs_minfree; 911 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 912 asb->fs_maxbpg = sb->fs_maxbpg; 913 914 /* The former fs_csp, totaling 128 bytes */ 915 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 916 asb->fs_contigdirs = sb->fs_contigdirs; 917 asb->fs_csp = sb->fs_csp; 918 asb->fs_maxcluster = sb->fs_maxcluster; 919 asb->fs_active = sb->fs_active; 920 921 /* The former fs_fsmnt, totaling 512 bytes */ 922 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 923 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 924 925 return memcmp(sb, asb, sb->fs_sbsize); 926 } 927 928 /* BSD 4.4 performed the following superblock comparison 929 * This was used in NetBSD through 1.6.1 930 * 931 * Note that this implementation is destructive to asb. 932 */ 933 int 934 cmpsblks44(const struct fs *sb, struct fs *asb) 935 { 936 /* 937 * "Copy fields which we don't care if they're different in the 938 * alternate superblocks, as they're either likely to be 939 * different because they're per-cylinder-group specific, or 940 * because they're transient details which are only maintained 941 * in the primary superblock." 942 */ 943 asb->fs_firstfield = sb->fs_firstfield; 944 asb->fs_unused_1 = sb->fs_unused_1; 945 asb->fs_old_time = sb->fs_old_time; 946 asb->fs_old_cstotal = sb->fs_old_cstotal; 947 asb->fs_cgrotor = sb->fs_cgrotor; 948 asb->fs_fmod = sb->fs_fmod; 949 asb->fs_clean = sb->fs_clean; 950 asb->fs_ronly = sb->fs_ronly; 951 asb->fs_old_flags = sb->fs_old_flags; 952 asb->fs_maxcontig = sb->fs_maxcontig; 953 asb->fs_minfree = sb->fs_minfree; 954 asb->fs_optim = sb->fs_optim; 955 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 956 asb->fs_maxbpg = sb->fs_maxbpg; 957 958 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 959 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 960 asb->fs_contigdirs = sb->fs_contigdirs; 961 asb->fs_csp = sb->fs_csp; 962 asb->fs_maxcluster = sb->fs_maxcluster; 963 asb->fs_active = sb->fs_active; 964 965 /* The former fs_fsmnt, totaling 512 bytes */ 966 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 967 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 968 969 /* The former fs_sparecon, totaling 200 bytes */ 970 memmove(asb->fs_snapinum, 971 sb->fs_snapinum, sizeof sb->fs_snapinum); 972 asb->fs_avgfilesize = sb->fs_avgfilesize; 973 asb->fs_avgfpdir = sb->fs_avgfpdir; 974 asb->fs_save_cgsize = sb->fs_save_cgsize; 975 memmove(asb->fs_sparecon32, 976 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 977 asb->fs_flags = sb->fs_flags; 978 979 /* Original comment: 980 * "The following should not have to be copied, but need to be." 981 */ 982 asb->fs_fsbtodb = sb->fs_fsbtodb; 983 asb->fs_old_interleave = sb->fs_old_interleave; 984 asb->fs_old_npsect = sb->fs_old_npsect; 985 asb->fs_old_nrpos = sb->fs_old_nrpos; 986 asb->fs_state = sb->fs_state; 987 asb->fs_qbmask = sb->fs_qbmask; 988 asb->fs_qfmask = sb->fs_qfmask; 989 asb->fs_state = sb->fs_state; 990 asb->fs_maxfilesize = sb->fs_maxfilesize; 991 992 /* 993 * "Compare the superblocks, effectively checking every other 994 * field to see if they differ." 995 */ 996 return memcmp(sb, asb, sb->fs_sbsize); 997 } 998 999 1000 static void 1001 badsb(int listerr, const char *s) 1002 { 1003 1004 if (!listerr) 1005 return; 1006 if (preen) 1007 printf("%s: ", cdevname()); 1008 pfatal("BAD SUPER BLOCK: %s\n", s); 1009 } 1010 1011 /* 1012 * Calculate a prototype superblock based on information in the disk label. 1013 * When done the cgsblock macro can be calculated and the fs_ncg field 1014 * can be used. Do NOT attempt to use other macros without verifying that 1015 * their needed information is available! 1016 */ 1017 static int 1018 calcsb(const char *dev, int devfd, struct fs *fs) 1019 { 1020 struct dkwedge_info dkw; 1021 struct disk_geom geo; 1022 int i, nspf; 1023 1024 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 1025 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1026 if (dkw.dkw_parent[0] == '\0') { 1027 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1028 return (0); 1029 } 1030 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) && 1031 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS)) { 1032 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 1033 dev, dkw.dkw_ptype); 1034 return (0); 1035 } 1036 if (geo.dg_secsize == 0) { 1037 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 1038 return 0; 1039 } 1040 if (geo.dg_secpercyl == 0) { 1041 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 1042 return 0; 1043 } 1044 if (sblk.b_un.b_fs->fs_fsize == 0) { 1045 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 1046 return 0; 1047 } 1048 if (sblk.b_un.b_fs->fs_fpg == 0) { 1049 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1050 return 0; 1051 } 1052 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1053 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1054 return 0; 1055 } 1056 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1057 nspf = fs->fs_fsize / geo.dg_secsize; 1058 fs->fs_old_nspf = nspf; 1059 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1060 fs->fs_fsbtodb++; 1061 dev_bsize = geo.dg_secsize; 1062 if (fs->fs_magic == FS_UFS2_MAGIC) { 1063 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1064 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1065 fs->fs_old_cgmask = 0xffffffff; 1066 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1067 fs->fs_old_cgmask <<= 1; 1068 if (!POWEROF2(geo.dg_ntracks)) 1069 fs->fs_old_cgmask <<= 1; 1070 fs->fs_old_cgoffset = roundup( 1071 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1072 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1073 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1074 fs->fs_old_cpg); 1075 } 1076 return (1); 1077 } 1078
Indexes created Thu Oct 23 22:10:10 GMT 2025