setup.c revision 1.102
1 /* $NetBSD: setup.c,v 1.102 2018/10/05 09:49:23 hannken 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 1.102 2018/10/05 09:49:23 hannken 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 static int check_snapinum(void); 77 78 int16_t sblkpostbl[256]; 79 80 /* 81 * Read in a superblock finding an alternate if necessary. 82 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 83 * is already clean (preen mode only). 84 */ 85 int 86 setup(const char *dev, const char *origdev) 87 { 88 long cg, size, asked, i, j; 89 long bmapsize; 90 struct disk_geom geo; 91 struct dkwedge_info dkw; 92 off_t sizepb; 93 struct stat statb; 94 struct fs proto; 95 int doskipclean; 96 u_int64_t maxfilesize; 97 struct csum *ccsp; 98 int fd; 99 100 havesb = 0; 101 fswritefd = -1; 102 doskipclean = skipclean; 103 if (stat(dev, &statb) < 0) { 104 printf("Can't stat %s: %s\n", dev, strerror(errno)); 105 return (0); 106 } 107 if (!forceimage && !S_ISCHR(statb.st_mode)) { 108 pfatal("%s is not a character device", dev); 109 if (reply("CONTINUE") == 0) 110 return (0); 111 } 112 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 113 printf("Can't open %s: %s\n", dev, strerror(errno)); 114 return (0); 115 } 116 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 117 fswritefd = -1; 118 if (preen) 119 pfatal("NO WRITE ACCESS"); 120 printf("** %s (NO WRITE)\n", dev); 121 quiet = 0; 122 } else 123 if (!preen && !quiet) 124 printf("** %s\n", dev); 125 fsmodified = 0; 126 lfdir = 0; 127 initbarea(&sblk); 128 initbarea(&asblk); 129 sblk.b_un.b_buf = malloc(SBLOCKSIZE); 130 sblock = malloc(SBLOCKSIZE); 131 asblk.b_un.b_buf = malloc(SBLOCKSIZE); 132 altsblock = malloc(SBLOCKSIZE); 133 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 134 sblock == NULL || altsblock == NULL) 135 errexit("Cannot allocate space for superblock"); 136 if (strcmp(dev, origdev) && !forceimage) { 137 /* 138 * dev isn't the original fs (for example it's a snapshot) 139 * do getdiskinfo on the original device 140 */ 141 fd = open(origdev, O_RDONLY); 142 if (fd < 0) { 143 warn("Can't open %s", origdev); 144 return (0); 145 } 146 } else { 147 fd = fsreadfd; 148 } 149 if (!forceimage && getdiskinfo(origdev, fd, NULL, &geo, &dkw) != -1) 150 dev_bsize = secsize = geo.dg_secsize; 151 else 152 dev_bsize = secsize = DEV_BSIZE; 153 /* 154 * Read in the superblock, looking for alternates if necessary 155 */ 156 if (readsb(1) == 0) { 157 if (bflag || preen || forceimage || 158 calcsb(dev, fsreadfd, &proto) == 0) 159 return(0); 160 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 161 return (0); 162 for (cg = 0; cg < proto.fs_ncg; cg++) { 163 bflag = FFS_FSBTODB(&proto, cgsblock(&proto, cg)); 164 if (readsb(0) != 0) 165 break; 166 } 167 if (cg >= proto.fs_ncg) { 168 printf("%s %s\n%s %s\n%s %s\n", 169 "SEARCH FOR ALTERNATE SUPER-BLOCK", 170 "FAILED. YOU MUST USE THE", 171 "-b OPTION TO fsck_ffs TO SPECIFY THE", 172 "LOCATION OF AN ALTERNATE", 173 "SUPER-BLOCK TO SUPPLY NEEDED", 174 "INFORMATION; SEE fsck_ffs(8)."); 175 return(0); 176 } 177 doskipclean = 0; 178 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 179 } 180 181 if (!quota2_check_doquota()) 182 doskipclean = 0; 183 184 /* ffs_superblock_layout() == 2 */ 185 if (sblock->fs_magic != FS_UFS1_MAGIC || 186 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) { 187 /* can have WAPBL */ 188 if (check_wapbl() != 0) { 189 doskipclean = 0; 190 } 191 if (sblock->fs_flags & FS_DOWAPBL) { 192 if (preen && doskipclean) { 193 if (!quiet) 194 pwarn("file system is journaled; " 195 "not checking\n"); 196 return (-1); 197 } 198 if (!quiet) 199 pwarn("** File system is journaled; " 200 "replaying journal\n"); 201 replay_wapbl(); 202 doskipclean = 0; 203 sblock->fs_flags &= ~FS_DOWAPBL; 204 sbdirty(); 205 /* Although we may have updated the superblock from 206 * the journal, we are still going to do a full check, 207 * so we don't bother to re-read the superblock from 208 * the journal. 209 * XXX, instead we could re-read the superblock and 210 * then not force doskipclean = 0 211 */ 212 } 213 } 214 if (debug) 215 printf("clean = %d\n", sblock->fs_clean); 216 217 if (doswap) 218 doskipclean = 0; 219 220 if (sblock->fs_clean & FS_ISCLEAN) { 221 if (doskipclean) { 222 if (!quiet) 223 pwarn("%sile system is clean; not checking\n", 224 preen ? "f" : "** F"); 225 return (-1); 226 } 227 if (!preen && !doswap) 228 pwarn("** File system is already clean\n"); 229 } 230 maxfsblock = sblock->fs_size; 231 maxino = sblock->fs_ncg * sblock->fs_ipg; 232 sizepb = sblock->fs_bsize; 233 maxfilesize = sblock->fs_bsize * UFS_NDADDR - 1; 234 for (i = 0; i < UFS_NIADDR; i++) { 235 sizepb *= FFS_NINDIR(sblock); 236 maxfilesize += sizepb; 237 } 238 if ((!is_ufs2 && cvtlevel >= 4) && 239 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 240 if (preen) 241 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 242 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 243 return(0); 244 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 245 /* Disable the postbl tables */ 246 sblock->fs_old_cpc = 0; 247 sblock->fs_old_nrpos = 1; 248 sblock->fs_old_trackskew = 0; 249 /* The other fields have already been updated by 250 * sb_oldfscompat_read 251 */ 252 sbdirty(); 253 } 254 if (!is_ufs2 && cvtlevel == 3 && 255 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 256 if (preen) 257 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 258 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 259 return(0); 260 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 261 sb_oldfscompat_write(sblock, sblock); 262 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 263 /* Leave postbl tables disabled, but blank its superblock region anyway */ 264 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 265 sblock->fs_old_cpc = 0; 266 sblock->fs_old_nrpos = 1; 267 sblock->fs_old_trackskew = 0; 268 memset(&sblock->fs_old_postbl_start, 0xff, 256); 269 sb_oldfscompat_read(sblock, &sblocksave); 270 sbdirty(); 271 } 272 /* 273 * Check and potentially fix certain fields in the super block. 274 */ 275 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 276 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 277 if (reply("CLEAR") == 1) { 278 sblock->fs_flags &= FS_KNOWN_FLAGS; 279 sbdirty(); 280 } 281 } 282 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 283 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 284 if (reply("SET TO DEFAULT") == 1) { 285 sblock->fs_optim = FS_OPTTIME; 286 sbdirty(); 287 } 288 } 289 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 290 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 291 sblock->fs_minfree); 292 if (reply("SET TO DEFAULT") == 1) { 293 sblock->fs_minfree = 10; 294 sbdirty(); 295 } 296 } 297 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 298 (sblock->fs_old_interleave < 1 || 299 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 300 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 301 sblock->fs_old_interleave); 302 sblock->fs_old_interleave = 1; 303 if (preen) 304 printf(" (FIXED)\n"); 305 if (preen || reply("SET TO DEFAULT") == 1) { 306 sbdirty(); 307 dirty(&asblk); 308 } 309 } 310 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 311 (sblock->fs_old_npsect < sblock->fs_old_nsect || 312 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 313 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 314 sblock->fs_old_npsect); 315 sblock->fs_old_npsect = sblock->fs_old_nsect; 316 if (preen) 317 printf(" (FIXED)\n"); 318 if (preen || reply("SET TO DEFAULT") == 1) { 319 sbdirty(); 320 dirty(&asblk); 321 } 322 } 323 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 324 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 325 sblock->fs_bmask); 326 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 327 if (preen) 328 printf(" (FIXED)\n"); 329 if (preen || reply("FIX") == 1) { 330 sbdirty(); 331 dirty(&asblk); 332 } 333 } 334 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 335 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 336 sblock->fs_fmask); 337 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 338 if (preen) 339 printf(" (FIXED)\n"); 340 if (preen || reply("FIX") == 1) { 341 sbdirty(); 342 dirty(&asblk); 343 } 344 } 345 if (check_snapinum()) { 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_old_inodefmt >= FS_44INODEFMT) { 354 if (sblock->fs_maxfilesize != maxfilesize) { 355 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 356 (unsigned long long)sblock->fs_maxfilesize); 357 sblock->fs_maxfilesize = maxfilesize; 358 if (preen) 359 printf(" (FIXED)\n"); 360 if (preen || reply("FIX") == 1) { 361 sbdirty(); 362 dirty(&asblk); 363 } 364 } 365 if ((is_ufs2 && sblock->fs_maxsymlinklen != UFS2_MAXSYMLINKLEN) 366 || 367 (!is_ufs2 && sblock->fs_maxsymlinklen != UFS1_MAXSYMLINKLEN)) 368 { 369 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 370 sblock->fs_maxsymlinklen); 371 sblock->fs_maxsymlinklen = is_ufs2 ? 372 UFS2_MAXSYMLINKLEN : UFS1_MAXSYMLINKLEN; 373 if (preen) 374 printf(" (FIXED)\n"); 375 if (preen || reply("FIX") == 1) { 376 sbdirty(); 377 dirty(&asblk); 378 } 379 } 380 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 381 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 382 (unsigned long long)sblock->fs_qbmask); 383 sblock->fs_qbmask = ~sblock->fs_bmask; 384 if (preen) 385 printf(" (FIXED)\n"); 386 if (preen || reply("FIX") == 1) { 387 sbdirty(); 388 dirty(&asblk); 389 } 390 } 391 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 392 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 393 (unsigned long long)sblock->fs_qfmask); 394 sblock->fs_qfmask = ~sblock->fs_fmask; 395 if (preen) 396 printf(" (FIXED)\n"); 397 if (preen || reply("FIX") == 1) { 398 sbdirty(); 399 dirty(&asblk); 400 } 401 } 402 newinofmt = 1; 403 } else { 404 sblock->fs_qbmask = ~sblock->fs_bmask; 405 sblock->fs_qfmask = ~sblock->fs_fmask; 406 newinofmt = 0; 407 } 408 /* 409 * Convert to new inode format. 410 */ 411 if (!is_ufs2 && cvtlevel >= 2 && 412 sblock->fs_old_inodefmt < FS_44INODEFMT) { 413 if (preen) 414 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 415 else if (!reply("CONVERT TO NEW INODE FORMAT")) 416 return(0); 417 doinglevel2++; 418 sblock->fs_old_inodefmt = FS_44INODEFMT; 419 sblock->fs_maxfilesize = maxfilesize; 420 sblock->fs_maxsymlinklen = UFS1_MAXSYMLINKLEN; 421 sblock->fs_qbmask = ~sblock->fs_bmask; 422 sblock->fs_qfmask = ~sblock->fs_fmask; 423 sbdirty(); 424 dirty(&asblk); 425 } 426 /* 427 * Convert to new cylinder group format. 428 */ 429 if (!is_ufs2 && cvtlevel >= 1 && 430 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 431 if (preen) 432 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 433 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 434 return(0); 435 doinglevel1++; 436 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 437 sblock->fs_old_nrpos = 8; 438 sblock->fs_old_postbloff = 439 (char *)(&sblock->fs_old_postbl_start) - 440 (char *)(&sblock->fs_firstfield); 441 sblock->fs_old_rotbloff = 442 (char *)(&sblock->fs_magic+1) - 443 (char *)(&sblock->fs_firstfield); 444 sblock->fs_cgsize = 445 ffs_fragroundup(sblock, CGSIZE(sblock)); 446 sbdirty(); 447 dirty(&asblk); 448 } 449 if (asblk.b_dirty && !bflag) { 450 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 451 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 452 if (needswap) 453 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 454 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 455 flush(fswritefd, &asblk); 456 } 457 /* 458 * read in the summary info. 459 */ 460 asked = 0; 461 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 462 if (sblock->fs_csp == NULL) { 463 pwarn("cannot alloc %u bytes for summary info\n", 464 sblock->fs_cssize); 465 goto badsblabel; 466 } 467 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 468 size = sblock->fs_cssize - i < sblock->fs_bsize ? 469 sblock->fs_cssize - i : sblock->fs_bsize; 470 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 471 if (bread(fsreadfd, (char *)ccsp, 472 FFS_FSBTODB(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 473 size) != 0 && !asked) { 474 pfatal("BAD SUMMARY INFORMATION"); 475 if (reply("CONTINUE") == 0) { 476 markclean = 0; 477 exit(FSCK_EXIT_CHECK_FAILED); 478 } 479 asked++; 480 } 481 if (doswap) { 482 ffs_csum_swap(ccsp, ccsp, size); 483 bwrite(fswritefd, (char *)ccsp, 484 FFS_FSBTODB(sblock, 485 sblock->fs_csaddr + j * sblock->fs_frag), 486 size); 487 } 488 if (needswap) 489 ffs_csum_swap(ccsp, ccsp, size); 490 } 491 /* 492 * allocate and initialize the necessary maps 493 */ 494 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 495 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 496 if (blockmap == NULL) { 497 pwarn("cannot alloc %u bytes for blockmap\n", 498 (unsigned)bmapsize); 499 goto badsblabel; 500 } 501 inostathead = calloc((unsigned)(sblock->fs_ncg), 502 sizeof(struct inostatlist)); 503 if (inostathead == NULL) { 504 pwarn("cannot alloc %u bytes for inostathead\n", 505 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 506 goto badsblabel; 507 } 508 /* 509 * cs_ndir may be inaccurate, particularly if we're using the -b 510 * option, so set a minimum to prevent bogus subdirectory reconnects 511 * and really inefficient directory scans. 512 * Also set a maximum in case the value is too large. 513 */ 514 numdirs = sblock->fs_cstotal.cs_ndir; 515 if (numdirs < 1024) 516 numdirs = 1024; 517 if ((ino_t)numdirs > maxino + 1) 518 numdirs = maxino + 1; 519 dirhash = numdirs; 520 inplast = 0; 521 listmax = numdirs + 10; 522 inpsort = calloc((unsigned)listmax, sizeof(*inpsort)); 523 inphead = calloc((unsigned)numdirs, sizeof(*inphead)); 524 if (inpsort == NULL || inphead == NULL) { 525 pwarn("cannot alloc %u bytes for inphead\n", 526 (unsigned)(numdirs * sizeof(struct inoinfo *))); 527 goto badsblabel; 528 } 529 cgrp = malloc(sblock->fs_cgsize); 530 if (cgrp == NULL) { 531 pwarn("cannot alloc %u bytes for cylinder group\n", 532 sblock->fs_cgsize); 533 goto badsblabel; 534 } 535 bufinit(); 536 if (sblock->fs_flags & FS_DOSOFTDEP) 537 usedsoftdep = 1; 538 else 539 usedsoftdep = 0; 540 541 #ifndef NO_APPLE_UFS 542 if (!forceimage && dkw.dkw_parent[0]) 543 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 544 isappleufs = 1; 545 546 if (readappleufs()) 547 isappleufs = 1; 548 #endif 549 550 if (isappleufs) 551 dirblksiz = APPLEUFS_DIRBLKSIZ; 552 else 553 dirblksiz = UFS_DIRBLKSIZ; 554 555 if (debug) 556 #ifndef NO_APPLE_UFS 557 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 558 #else 559 printf("dirblksiz = %d\n", dirblksiz); 560 #endif 561 562 if (sblock->fs_flags & FS_DOQUOTA2) { 563 /* allocate the quota hash table */ 564 /* 565 * first compute the size of the hash table 566 * We know the smallest block size is 4k, so we can use 2k 567 * for the hash table; as an entry is 8 bytes we can store 568 * 256 entries. So let start q2h_hash_shift at 8 569 */ 570 for (q2h_hash_shift = 8; 571 q2h_hash_shift < 15; 572 q2h_hash_shift++) { 573 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 574 sizeof(struct quota2_header) > 575 (size_t)sblock->fs_bsize) 576 break; 577 } 578 q2h_hash_mask = (1 << q2h_hash_shift) - 1; 579 if (debug) { 580 printf("quota hash shift %d, %d entries, mask 0x%x\n", 581 q2h_hash_shift, (1 << q2h_hash_shift), 582 q2h_hash_mask); 583 } 584 uquot_user_hash = 585 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 586 uquot_group_hash = 587 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 588 if (uquot_user_hash == NULL || uquot_group_hash == NULL) 589 errexit("Cannot allocate space for quotas hash\n"); 590 } else { 591 uquot_user_hash = uquot_group_hash = NULL; 592 q2h_hash_shift = q2h_hash_mask = 0; 593 } 594 return (1); 595 badsblabel: 596 markclean=0; 597 ckfini(1); 598 return (0); 599 } 600 601 #ifndef NO_APPLE_UFS 602 static int 603 readappleufs(void) 604 { 605 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 606 struct appleufslabel *appleufs; 607 int i; 608 609 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 610 * being block aligned (CD's?) 611 */ 612 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0) 613 return 0; 614 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 615 (long)APPLEUFS_LABEL_SIZE) != 0) 616 return 0; 617 appleufsblk.b_bno = label; 618 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 619 620 appleufs = appleufsblk.b_un.b_appleufs; 621 622 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 623 if (!isappleufs) { 624 return 0; 625 } else { 626 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 627 if (reply("FIX") == 0) { 628 return 1; 629 } 630 ffs_appleufs_set(appleufs, NULL, -1, 0); 631 appleufsdirty(); 632 } 633 } 634 635 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 636 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 637 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 638 if (preen) { 639 printf(" (CORRECTED)\n"); 640 } 641 if (preen || reply("CORRECT")) { 642 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 643 appleufsdirty(); 644 } 645 } 646 647 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 648 pwarn("APPLE UFS LABEL NAME TOO LONG"); 649 if (preen) { 650 printf(" (TRUNCATED)\n"); 651 } 652 if (preen || reply("TRUNCATE")) { 653 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 654 appleufsdirty(); 655 } 656 } 657 658 if (ntohs(appleufs->ul_namelen) == 0) { 659 pwarn("MISSING APPLE UFS LABEL NAME"); 660 if (preen) { 661 printf(" (FIXED)\n"); 662 } 663 if (preen || reply("FIX")) { 664 ffs_appleufs_set(appleufs, NULL, -1, 0); 665 appleufsdirty(); 666 } 667 } 668 669 /* Scan name for first illegal character */ 670 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 671 if ((appleufs->ul_name[i] == '\0') || 672 (appleufs->ul_name[i] == ':') || 673 (appleufs->ul_name[i] == '/')) { 674 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 675 if (preen) { 676 printf(" (TRUNCATED)\n"); 677 } 678 if (preen || reply("TRUNCATE")) { 679 appleufs->ul_namelen = i+1; 680 appleufsdirty(); 681 } 682 break; 683 } 684 } 685 686 /* Check the checksum last, because if anything else was wrong, 687 * then the checksum gets reset anyway. 688 */ 689 appleufs->ul_checksum = 0; 690 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 691 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 692 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 693 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 694 if (preen) { 695 printf(" (CORRECTED)\n"); 696 } 697 if (preen || reply("CORRECT")) { 698 appleufsdirty(); 699 } else { 700 /* put the incorrect checksum back in place */ 701 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 702 } 703 } 704 return 1; 705 } 706 #endif /* !NO_APPLE_UFS */ 707 708 /* 709 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 710 */ 711 static int 712 detect_byteorder(struct fs *fs, int sblockoff) 713 { 714 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 715 fs->fs_magic == FS_UFS1_MAGIC_SWAPPED)) 716 /* Likely to be the first alternate of a fs with 64k blocks */ 717 return -1; 718 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) { 719 #ifndef NO_FFS_EI 720 if (endian == 0 || BYTE_ORDER == endian) { 721 needswap = 0; 722 doswap = do_blkswap = do_dirswap = 0; 723 } else { 724 needswap = 1; 725 doswap = do_blkswap = do_dirswap = 1; 726 } 727 #endif 728 return 0; 729 } 730 #ifndef NO_FFS_EI 731 else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED || 732 fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) { 733 if (endian == 0 || BYTE_ORDER != endian) { 734 needswap = 1; 735 doswap = do_blkswap = do_dirswap = 0; 736 } else { 737 needswap = 0; 738 doswap = do_blkswap = do_dirswap = 1; 739 } 740 return 0; 741 } 742 #endif 743 return -1; 744 } 745 746 /* 747 * Possible superblock locations ordered from most to least likely. 748 */ 749 static off_t sblock_try[] = SBLOCKSEARCH; 750 751 /* 752 * Read in the super block and its summary info. 753 */ 754 static int 755 readsb(int listerr) 756 { 757 daddr_t super = 0; 758 struct fs *fs; 759 int i; 760 761 if (bflag) { 762 super = bflag; 763 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 764 (long)SBLOCKSIZE) != 0) 765 return (0); 766 fs = sblk.b_un.b_fs; 767 if (detect_byteorder(fs, -1) < 0) { 768 badsb(listerr, "MAGIC NUMBER WRONG"); 769 return (0); 770 } 771 } else { 772 for (i = 0; sblock_try[i] != -1; i++) { 773 super = sblock_try[i] / dev_bsize; 774 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 775 super, (long)SBLOCKSIZE) != 0) 776 continue; 777 fs = sblk.b_un.b_fs; 778 if (detect_byteorder(fs, sblock_try[i]) == 0) 779 break; 780 } 781 if (sblock_try[i] == -1) { 782 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 783 return (0); 784 } 785 } 786 if (doswap) { 787 if (preen) 788 errx(FSCK_EXIT_USAGE, 789 "Incompatible options -B and -p"); 790 if (nflag) 791 errx(FSCK_EXIT_USAGE, 792 "Incompatible options -B and -n"); 793 if (endian == LITTLE_ENDIAN) { 794 if (!reply("CONVERT TO LITTLE ENDIAN")) 795 return 0; 796 } else if (endian == BIG_ENDIAN) { 797 if (!reply("CONVERT TO BIG ENDIAN")) 798 return 0; 799 } else 800 pfatal("INTERNAL ERROR: unknown endian"); 801 } 802 if (needswap) 803 pwarn("** Swapped byte order\n"); 804 /* swap SB byte order if asked */ 805 if (doswap) 806 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 807 808 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 809 if (needswap) 810 ffs_sb_swap(sblk.b_un.b_fs, sblock); 811 812 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 813 814 /* 815 * run a few consistency checks of the super block 816 */ 817 if (sblock->fs_sbsize > SBLOCKSIZE) 818 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 819 /* 820 * Compute block size that the filesystem is based on, 821 * according to FFS_FSBTODB, and adjust superblock block number 822 * so we can tell if this is an alternate later. 823 */ 824 super *= dev_bsize; 825 dev_bsize = sblock->fs_fsize / FFS_FSBTODB(sblock, 1); 826 sblk.b_bno = super / dev_bsize; 827 sblk.b_size = SBLOCKSIZE; 828 if (bflag) 829 goto out; 830 /* 831 * Set all possible fields that could differ, then do check 832 * of whole super block against an alternate super block-> 833 * When an alternate super-block is specified this check is skipped. 834 */ 835 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 836 if (asblk.b_errs) 837 return (0); 838 /* swap SB byte order if asked */ 839 if (doswap) 840 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 841 842 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 843 if (needswap) 844 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 845 if (cmpsblks(sblock, altsblock)) { 846 if (debug) { 847 uint32_t *nlp, *olp, *endlp; 848 849 printf("superblock mismatches\n"); 850 nlp = (uint32_t *)altsblock; 851 olp = (uint32_t *)sblock; 852 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 853 for ( ; olp < endlp; olp++, nlp++) { 854 if (*olp == *nlp) 855 continue; 856 printf("offset %#x, original 0x%08x, alternate " 857 "0x%08x\n", 858 (int)((uint8_t *)olp-(uint8_t *)sblock), 859 *olp, *nlp); 860 } 861 } 862 badsb(listerr, 863 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 864 /* 865 return (0); 866 */ 867 } 868 out: 869 870 sb_oldfscompat_read(sblock, &sblocksave); 871 872 /* Now we know the SB is valid, we can write it back if needed */ 873 if (doswap) { 874 sbdirty(); 875 dirty(&asblk); 876 } 877 havesb = 1; 878 return (1); 879 } 880 881 int 882 cmpsblks(const struct fs *sb, struct fs *asb) 883 { 884 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 885 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 886 return cmpsblks42(sb, asb); 887 else 888 return cmpsblks44(sb, asb); 889 } 890 if (asb->fs_sblkno != sb->fs_sblkno || 891 asb->fs_cblkno != sb->fs_cblkno || 892 asb->fs_iblkno != sb->fs_iblkno || 893 asb->fs_dblkno != sb->fs_dblkno || 894 asb->fs_ncg != sb->fs_ncg || 895 asb->fs_bsize != sb->fs_bsize || 896 asb->fs_fsize != sb->fs_fsize || 897 asb->fs_frag != sb->fs_frag || 898 asb->fs_bmask != sb->fs_bmask || 899 asb->fs_fmask != sb->fs_fmask || 900 asb->fs_bshift != sb->fs_bshift || 901 asb->fs_fshift != sb->fs_fshift || 902 asb->fs_fragshift != sb->fs_fragshift || 903 asb->fs_fsbtodb != sb->fs_fsbtodb || 904 asb->fs_sbsize != sb->fs_sbsize || 905 asb->fs_nindir != sb->fs_nindir || 906 asb->fs_inopb != sb->fs_inopb || 907 asb->fs_cssize != sb->fs_cssize || 908 asb->fs_ipg != sb->fs_ipg || 909 asb->fs_fpg != sb->fs_fpg || 910 asb->fs_magic != sb->fs_magic) 911 return 1; 912 return 0; 913 } 914 915 /* BSD 4.2 performed the following superblock comparison 916 * It should correspond to FS_42POSTBLFMT 917 * (although note that in 4.2, the fs_old_postblformat 918 * field didn't exist and the corresponding bits are 919 * located near the end of the postbl itself, where they 920 * are not likely to be used.) 921 */ 922 int 923 cmpsblks42(const struct fs *sb, struct fs *asb) 924 { 925 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 926 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 927 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 928 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 929 asb->fs_cgrotor = sb->fs_cgrotor; 930 asb->fs_fmod = sb->fs_fmod; 931 asb->fs_clean = sb->fs_clean; 932 asb->fs_ronly = sb->fs_ronly; 933 asb->fs_old_flags = sb->fs_old_flags; 934 asb->fs_maxcontig = sb->fs_maxcontig; 935 asb->fs_minfree = sb->fs_minfree; 936 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 937 asb->fs_maxbpg = sb->fs_maxbpg; 938 939 /* The former fs_csp, totaling 128 bytes */ 940 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 941 asb->fs_contigdirs = sb->fs_contigdirs; 942 asb->fs_csp = sb->fs_csp; 943 asb->fs_maxcluster = sb->fs_maxcluster; 944 asb->fs_active = sb->fs_active; 945 946 /* The former fs_fsmnt, totaling 512 bytes */ 947 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 948 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 949 950 return memcmp(sb, asb, sb->fs_sbsize); 951 } 952 953 /* BSD 4.4 performed the following superblock comparison 954 * This was used in NetBSD through 1.6.1 955 * 956 * Note that this implementation is destructive to asb. 957 */ 958 int 959 cmpsblks44(const struct fs *sb, struct fs *asb) 960 { 961 /* 962 * "Copy fields which we don't care if they're different in the 963 * alternate superblocks, as they're either likely to be 964 * different because they're per-cylinder-group specific, or 965 * because they're transient details which are only maintained 966 * in the primary superblock." 967 */ 968 asb->fs_firstfield = sb->fs_firstfield; 969 asb->fs_unused_1 = sb->fs_unused_1; 970 asb->fs_old_time = sb->fs_old_time; 971 asb->fs_old_cstotal = sb->fs_old_cstotal; 972 asb->fs_cgrotor = sb->fs_cgrotor; 973 asb->fs_fmod = sb->fs_fmod; 974 asb->fs_clean = sb->fs_clean; 975 asb->fs_ronly = sb->fs_ronly; 976 asb->fs_old_flags = sb->fs_old_flags; 977 asb->fs_maxcontig = sb->fs_maxcontig; 978 asb->fs_minfree = sb->fs_minfree; 979 asb->fs_optim = sb->fs_optim; 980 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 981 asb->fs_maxbpg = sb->fs_maxbpg; 982 983 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 984 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 985 asb->fs_contigdirs = sb->fs_contigdirs; 986 asb->fs_csp = sb->fs_csp; 987 asb->fs_maxcluster = sb->fs_maxcluster; 988 asb->fs_active = sb->fs_active; 989 990 /* The former fs_fsmnt, totaling 512 bytes */ 991 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 992 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 993 994 /* The former fs_sparecon, totaling 200 bytes */ 995 memmove(asb->fs_snapinum, 996 sb->fs_snapinum, sizeof sb->fs_snapinum); 997 asb->fs_avgfilesize = sb->fs_avgfilesize; 998 asb->fs_avgfpdir = sb->fs_avgfpdir; 999 asb->fs_save_cgsize = sb->fs_save_cgsize; 1000 memmove(asb->fs_sparecon32, 1001 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 1002 asb->fs_flags = sb->fs_flags; 1003 1004 /* Original comment: 1005 * "The following should not have to be copied, but need to be." 1006 */ 1007 asb->fs_fsbtodb = sb->fs_fsbtodb; 1008 asb->fs_old_interleave = sb->fs_old_interleave; 1009 asb->fs_old_npsect = sb->fs_old_npsect; 1010 asb->fs_old_nrpos = sb->fs_old_nrpos; 1011 asb->fs_state = sb->fs_state; 1012 asb->fs_qbmask = sb->fs_qbmask; 1013 asb->fs_qfmask = sb->fs_qfmask; 1014 asb->fs_state = sb->fs_state; 1015 asb->fs_maxfilesize = sb->fs_maxfilesize; 1016 1017 /* 1018 * "Compare the superblocks, effectively checking every other 1019 * field to see if they differ." 1020 */ 1021 return memcmp(sb, asb, sb->fs_sbsize); 1022 } 1023 1024 1025 static void 1026 badsb(int listerr, const char *s) 1027 { 1028 1029 if (!listerr) 1030 return; 1031 if (preen) 1032 printf("%s: ", cdevname()); 1033 pfatal("BAD SUPER BLOCK: %s\n", s); 1034 } 1035 1036 /* 1037 * Calculate a prototype superblock based on information in the disk label. 1038 * When done the cgsblock macro can be calculated and the fs_ncg field 1039 * can be used. Do NOT attempt to use other macros without verifying that 1040 * their needed information is available! 1041 */ 1042 static int 1043 calcsb(const char *dev, int devfd, struct fs *fs) 1044 { 1045 struct dkwedge_info dkw; 1046 struct disk_geom geo; 1047 int i, nspf; 1048 1049 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 1050 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1051 if (dkw.dkw_parent[0] == '\0') { 1052 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1053 return (0); 1054 } 1055 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) 1056 #ifndef NO_APPLE_UFS 1057 && strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) 1058 #endif 1059 ) { 1060 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 1061 dev, dkw.dkw_ptype); 1062 return (0); 1063 } 1064 if (geo.dg_secsize == 0) { 1065 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 1066 return 0; 1067 } 1068 if (geo.dg_secpercyl == 0) { 1069 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 1070 return 0; 1071 } 1072 if (sblk.b_un.b_fs->fs_fsize == 0) { 1073 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 1074 return 0; 1075 } 1076 if (sblk.b_un.b_fs->fs_fpg == 0) { 1077 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1078 return 0; 1079 } 1080 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1081 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1082 return 0; 1083 } 1084 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1085 nspf = fs->fs_fsize / geo.dg_secsize; 1086 fs->fs_old_nspf = nspf; 1087 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1088 fs->fs_fsbtodb++; 1089 dev_bsize = geo.dg_secsize; 1090 if (fs->fs_magic == FS_UFS2_MAGIC) { 1091 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1092 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1093 fs->fs_old_cgmask = 0xffffffff; 1094 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1095 fs->fs_old_cgmask <<= 1; 1096 if (!POWEROF2(geo.dg_ntracks)) 1097 fs->fs_old_cgmask <<= 1; 1098 fs->fs_old_cgoffset = roundup( 1099 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1100 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1101 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1102 fs->fs_old_cpg); 1103 } 1104 return (1); 1105 } 1106 1107 /* 1108 * Test the list of snapshot inode numbers for duplicates and repair. 1109 */ 1110 static int 1111 check_snapinum(void) 1112 { 1113 int loc, loc2, res; 1114 int *snapinum = &sblock->fs_snapinum[0]; 1115 1116 res = 0; 1117 1118 if (isappleufs) 1119 return 0; 1120 1121 for (loc = 0; loc < FSMAXSNAP; loc++) { 1122 if (snapinum[loc] == 0) 1123 break; 1124 for (loc2 = loc + 1; loc2 < FSMAXSNAP; loc2++) { 1125 if (snapinum[loc2] == 0 || 1126 snapinum[loc2] == snapinum[loc]) 1127 break; 1128 } 1129 if (loc2 >= FSMAXSNAP || snapinum[loc2] == 0) 1130 continue; 1131 pwarn("SNAPSHOT INODE %u ALREADY ON LIST%s", snapinum[loc2], 1132 (res ? "" : "\n")); 1133 res = 1; 1134 for (loc2 = loc + 1; loc2 < FSMAXSNAP; loc2++) { 1135 if (snapinum[loc2] == 0) 1136 break; 1137 snapinum[loc2 - 1] = snapinum[loc2]; 1138 } 1139 snapinum[loc2 - 1] = 0; 1140 loc--; 1141 } 1142 1143 return res; 1144 } 1145
Indexes created Fri Sep 26 20:09:58 GMT 2025