1/* $NetBSD: setup.c,v 1.94 2011/08/14 12:32:01 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 35static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 36#else 37__RCSID("$NetBSD: setup.c,v 1.94 2011/08/14 12:32:01 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 70static void badsb(int, const char *); 71static int calcsb(const char *, int, struct fs *); 72static int readsb(int); 73static int readappleufs(void); 74 75int16_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 */ 82int 83setup(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 ((ino_t)numdirs > maxino + 1) 507 numdirs = maxino + 1; 508 dirhash = numdirs; 509 inplast = 0; 510 listmax = numdirs + 10; 511 inpsort = calloc((unsigned)listmax, sizeof(*inpsort)); 512 inphead = calloc((unsigned)numdirs, sizeof(*inphead)); 513 if (inpsort == NULL || inphead == NULL) { 514 pwarn("cannot alloc %u bytes for inphead\n", 515 (unsigned)(numdirs * sizeof(struct inoinfo *))); 516 goto badsblabel; 517 } 518 cgrp = malloc(sblock->fs_cgsize); 519 if (cgrp == NULL) { 520 pwarn("cannot alloc %u bytes for cylinder group\n", 521 sblock->fs_cgsize); 522 goto badsblabel; 523 } 524 bufinit(); 525 if (sblock->fs_flags & FS_DOSOFTDEP) 526 usedsoftdep = 1; 527 else 528 usedsoftdep = 0; 529 530 if (!forceimage && dkw.dkw_parent[0]) 531 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 532 isappleufs = 1; 533 534 if (readappleufs()) 535 isappleufs = 1; 536 537 dirblksiz = DIRBLKSIZ; 538 if (isappleufs) 539 dirblksiz = APPLEUFS_DIRBLKSIZ; 540 541 if (debug) 542 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 543 544 if (sblock->fs_flags & FS_DOQUOTA2) { 545 /* allocate the quota hash table */ 546 /* 547 * first compute the size of the hash table 548 * We know the smallest block size is 4k, so we can use 2k 549 * for the hash table; as an entry is 8 bytes we can store 550 * 256 entries. So let start q2h_hash_shift at 8 551 */ 552 for (q2h_hash_shift = 8; 553 q2h_hash_shift < 15; 554 q2h_hash_shift++) { 555 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 556 sizeof(struct quota2_header) > 557 (size_t)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 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 568 uquot_group_hash = 569 calloc((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); 577badsblabel: 578 markclean=0; 579 ckfini(1); 580 return (0); 581} 582 583static int 584readappleufs(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 */ 691static int 692detect_byteorder(struct fs *fs, int sblockoff) 693{ 694 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 695 fs->fs_magic == FS_UFS1_MAGIC_SWAPPED)) 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 == FS_UFS1_MAGIC_SWAPPED || 708 fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) { 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 */ 724static off_t sblock_try[] = SBLOCKSEARCH; 725 726/* 727 * Read in the super block and its summary info. 728 */ 729static int 730readsb(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 } 843out: 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 856int 857cmpsblks(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 */ 897int 898cmpsblks42(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 */ 933int 934cmpsblks44(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 1000static void 1001badsb(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 */ 1017static int 1018calcsb(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