setup.c revision 1.105
1 /* $NetBSD: setup.c,v 1.105 2023/01/07 19:41:29 chs 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 1.105 2023/01/07 19:41:29 chs 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 = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 130 sblock = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 131 asblk.b_un.b_buf = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 132 altsblock = aligned_alloc(DEV_BSIZE, 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 *)aligned_alloc(DEV_BSIZE, 462 sblock->fs_cssize); 463 if (sblock->fs_csp == NULL) { 464 pwarn("cannot alloc %u bytes for summary info\n", 465 sblock->fs_cssize); 466 goto badsblabel; 467 } 468 memset(sblock->fs_csp, 0, sblock->fs_cssize); 469 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 470 size = sblock->fs_cssize - i < sblock->fs_bsize ? 471 sblock->fs_cssize - i : sblock->fs_bsize; 472 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 473 if (bread(fsreadfd, (char *)ccsp, 474 FFS_FSBTODB(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 475 size) != 0 && !asked) { 476 pfatal("BAD SUMMARY INFORMATION"); 477 if (reply("CONTINUE") == 0) { 478 markclean = 0; 479 exit(FSCK_EXIT_CHECK_FAILED); 480 } 481 asked++; 482 } 483 if (doswap) { 484 ffs_csum_swap(ccsp, ccsp, size); 485 bwrite(fswritefd, (char *)ccsp, 486 FFS_FSBTODB(sblock, 487 sblock->fs_csaddr + j * sblock->fs_frag), 488 size); 489 } 490 if (needswap) 491 ffs_csum_swap(ccsp, ccsp, size); 492 } 493 /* 494 * allocate and initialize the necessary maps 495 */ 496 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 497 blockmap = aligned_alloc(DEV_BSIZE, (unsigned)bmapsize); 498 if (blockmap == NULL) { 499 pwarn("cannot alloc %u bytes for blockmap\n", 500 (unsigned)bmapsize); 501 goto badsblabel; 502 } 503 memset(blockmap, 0, bmapsize); 504 inostathead = calloc((unsigned)(sblock->fs_ncg), 505 sizeof(struct inostatlist)); 506 if (inostathead == NULL) { 507 pwarn("cannot alloc %u bytes for inostathead\n", 508 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 509 goto badsblabel; 510 } 511 /* 512 * cs_ndir may be inaccurate, particularly if we're using the -b 513 * option, so set a minimum to prevent bogus subdirectory reconnects 514 * and really inefficient directory scans. 515 * Also set a maximum in case the value is too large. 516 */ 517 numdirs = sblock->fs_cstotal.cs_ndir; 518 if (numdirs < 1024) 519 numdirs = 1024; 520 if ((ino_t)numdirs > maxino + 1) 521 numdirs = maxino + 1; 522 dirhash = numdirs; 523 inplast = 0; 524 listmax = numdirs + 10; 525 inpsort = calloc((unsigned)listmax, sizeof(*inpsort)); 526 inphead = calloc((unsigned)numdirs, sizeof(*inphead)); 527 if (inpsort == NULL || inphead == NULL) { 528 pwarn("cannot alloc %u bytes for inphead\n", 529 (unsigned)(numdirs * sizeof(struct inoinfo *))); 530 goto badsblabel; 531 } 532 cgrp = aligned_alloc(DEV_BSIZE, sblock->fs_cgsize); 533 if (cgrp == NULL) { 534 pwarn("cannot alloc %u bytes for cylinder group\n", 535 sblock->fs_cgsize); 536 goto badsblabel; 537 } 538 bufinit(); 539 if (sblock->fs_flags & FS_DOSOFTDEP) 540 usedsoftdep = 1; 541 else 542 usedsoftdep = 0; 543 544 #ifndef NO_APPLE_UFS 545 if (!forceimage && dkw.dkw_parent[0]) 546 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 547 isappleufs = 1; 548 549 if (readappleufs()) 550 isappleufs = 1; 551 #endif 552 553 if (isappleufs) 554 dirblksiz = APPLEUFS_DIRBLKSIZ; 555 else 556 dirblksiz = UFS_DIRBLKSIZ; 557 558 if (debug) 559 #ifndef NO_APPLE_UFS 560 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 561 #else 562 printf("dirblksiz = %d\n", dirblksiz); 563 #endif 564 565 if (sblock->fs_flags & FS_DOQUOTA2) { 566 /* allocate the quota hash table */ 567 /* 568 * first compute the size of the hash table 569 * We know the smallest block size is 4k, so we can use 2k 570 * for the hash table; as an entry is 8 bytes we can store 571 * 256 entries. So let start q2h_hash_shift at 8 572 */ 573 for (q2h_hash_shift = 8; 574 q2h_hash_shift < 15; 575 q2h_hash_shift++) { 576 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 577 sizeof(struct quota2_header) > 578 (size_t)sblock->fs_bsize) 579 break; 580 } 581 q2h_hash_mask = (1 << q2h_hash_shift) - 1; 582 if (debug) { 583 printf("quota hash shift %d, %d entries, mask 0x%x\n", 584 q2h_hash_shift, (1 << q2h_hash_shift), 585 q2h_hash_mask); 586 } 587 uquot_user_hash = 588 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 589 uquot_group_hash = 590 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 591 if (uquot_user_hash == NULL || uquot_group_hash == NULL) 592 errexit("Cannot allocate space for quotas hash\n"); 593 } else { 594 uquot_user_hash = uquot_group_hash = NULL; 595 q2h_hash_shift = q2h_hash_mask = 0; 596 } 597 return (1); 598 badsblabel: 599 markclean=0; 600 ckfini(1); 601 return (0); 602 } 603 604 #ifndef NO_APPLE_UFS 605 static int 606 readappleufs(void) 607 { 608 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 609 struct appleufslabel *appleufs; 610 int i; 611 612 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 613 * being block aligned (CD's?) 614 */ 615 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0) 616 return 0; 617 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 618 (long)APPLEUFS_LABEL_SIZE) != 0) 619 return 0; 620 appleufsblk.b_bno = label; 621 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 622 623 appleufs = appleufsblk.b_un.b_appleufs; 624 625 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 626 if (!isappleufs) { 627 return 0; 628 } else { 629 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 630 if (reply("FIX") == 0) { 631 return 1; 632 } 633 ffs_appleufs_set(appleufs, NULL, -1, 0); 634 appleufsdirty(); 635 } 636 } 637 638 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 639 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 640 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 641 if (preen) { 642 printf(" (CORRECTED)\n"); 643 } 644 if (preen || reply("CORRECT")) { 645 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 646 appleufsdirty(); 647 } 648 } 649 650 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 651 pwarn("APPLE UFS LABEL NAME TOO LONG"); 652 if (preen) { 653 printf(" (TRUNCATED)\n"); 654 } 655 if (preen || reply("TRUNCATE")) { 656 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 657 appleufsdirty(); 658 } 659 } 660 661 if (ntohs(appleufs->ul_namelen) == 0) { 662 pwarn("MISSING APPLE UFS LABEL NAME"); 663 if (preen) { 664 printf(" (FIXED)\n"); 665 } 666 if (preen || reply("FIX")) { 667 ffs_appleufs_set(appleufs, NULL, -1, 0); 668 appleufsdirty(); 669 } 670 } 671 672 /* Scan name for first illegal character */ 673 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 674 if ((appleufs->ul_name[i] == '\0') || 675 (appleufs->ul_name[i] == ':') || 676 (appleufs->ul_name[i] == '/')) { 677 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 678 if (preen) { 679 printf(" (TRUNCATED)\n"); 680 } 681 if (preen || reply("TRUNCATE")) { 682 appleufs->ul_namelen = i+1; 683 appleufsdirty(); 684 } 685 break; 686 } 687 } 688 689 /* Check the checksum last, because if anything else was wrong, 690 * then the checksum gets reset anyway. 691 */ 692 appleufs->ul_checksum = 0; 693 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 694 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 695 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 696 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 697 if (preen) { 698 printf(" (CORRECTED)\n"); 699 } 700 if (preen || reply("CORRECT")) { 701 appleufsdirty(); 702 } else { 703 /* put the incorrect checksum back in place */ 704 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 705 } 706 } 707 return 1; 708 } 709 #endif /* !NO_APPLE_UFS */ 710 711 /* 712 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 713 */ 714 static int 715 detect_byteorder(struct fs *fs, int sblockoff) 716 { 717 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 718 fs->fs_magic == FS_UFS1_MAGIC_SWAPPED)) 719 /* Likely to be the first alternate of a fs with 64k blocks */ 720 return -1; 721 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC || 722 fs->fs_magic == FS_UFS2EA_MAGIC) { 723 #ifndef NO_FFS_EI 724 if (endian == 0 || BYTE_ORDER == endian) { 725 needswap = 0; 726 doswap = do_blkswap = do_dirswap = 0; 727 } else { 728 needswap = 1; 729 doswap = do_blkswap = do_dirswap = 1; 730 } 731 #endif 732 return 0; 733 } 734 #ifndef NO_FFS_EI 735 else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED || 736 fs->fs_magic == FS_UFS2_MAGIC_SWAPPED || 737 fs->fs_magic == FS_UFS2EA_MAGIC_SWAPPED) { 738 if (endian == 0 || BYTE_ORDER != endian) { 739 needswap = 1; 740 doswap = do_blkswap = do_dirswap = 0; 741 } else { 742 needswap = 0; 743 doswap = do_blkswap = do_dirswap = 1; 744 } 745 return 0; 746 } 747 #endif 748 return -1; 749 } 750 751 /* Update on-disk fs->fs_magic if we are converting */ 752 void 753 cvt_magic(struct fs *fs) 754 { 755 756 if (is_ufs2ea || doing2ea) { 757 if (fs->fs_magic == FS_UFS2_MAGIC) { 758 fs->fs_magic = FS_UFS2EA_MAGIC; 759 } 760 if (fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) { 761 fs->fs_magic = FS_UFS2EA_MAGIC_SWAPPED; 762 } 763 } 764 if (doing2noea) { 765 if (fs->fs_magic == FS_UFS2EA_MAGIC) { 766 fs->fs_magic = FS_UFS2_MAGIC; 767 } 768 if (fs->fs_magic == FS_UFS2EA_MAGIC_SWAPPED) { 769 fs->fs_magic = FS_UFS2_MAGIC_SWAPPED; 770 } 771 } 772 } 773 774 /* 775 * Possible superblock locations ordered from most to least likely. 776 */ 777 static off_t sblock_try[] = SBLOCKSEARCH; 778 779 /* 780 * Read in the super block and its summary info. 781 */ 782 static int 783 readsb(int listerr) 784 { 785 daddr_t super = 0; 786 struct fs *fs; 787 int i; 788 789 if (bflag) { 790 super = bflag; 791 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 792 (long)SBLOCKSIZE) != 0) 793 return (0); 794 fs = sblk.b_un.b_fs; 795 if (detect_byteorder(fs, -1) < 0) { 796 badsb(listerr, "MAGIC NUMBER WRONG"); 797 return (0); 798 } 799 } else { 800 for (i = 0; sblock_try[i] != -1; i++) { 801 super = sblock_try[i] / dev_bsize; 802 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 803 super, (long)SBLOCKSIZE) != 0) 804 continue; 805 fs = sblk.b_un.b_fs; 806 if (detect_byteorder(fs, sblock_try[i]) == 0) 807 break; 808 } 809 if (sblock_try[i] == -1) { 810 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 811 return (0); 812 } 813 } 814 if (doswap) { 815 if (preen) 816 errx(FSCK_EXIT_USAGE, 817 "Incompatible options -B and -p"); 818 if (nflag) 819 errx(FSCK_EXIT_USAGE, 820 "Incompatible options -B and -n"); 821 if (endian == LITTLE_ENDIAN) { 822 if (!reply("CONVERT TO LITTLE ENDIAN")) 823 return 0; 824 } else if (endian == BIG_ENDIAN) { 825 if (!reply("CONVERT TO BIG ENDIAN")) 826 return 0; 827 } else 828 pfatal("INTERNAL ERROR: unknown endian"); 829 } 830 if (needswap) 831 pwarn("** Swapped byte order\n"); 832 /* swap SB byte order if asked */ 833 if (doswap) 834 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 835 836 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 837 if (needswap) 838 ffs_sb_swap(sblk.b_un.b_fs, sblock); 839 if (sblock->fs_magic == FS_UFS2EA_MAGIC) { 840 is_ufs2ea = 1; 841 sblock->fs_magic = FS_UFS2_MAGIC; 842 } 843 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 844 845 /* change on-disk magic if asked */ 846 cvt_magic(fs); 847 848 /* 849 * run a few consistency checks of the super block 850 */ 851 if (sblock->fs_sbsize > SBLOCKSIZE) 852 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 853 /* 854 * Compute block size that the filesystem is based on, 855 * according to FFS_FSBTODB, and adjust superblock block number 856 * so we can tell if this is an alternate later. 857 */ 858 super *= dev_bsize; 859 dev_bsize = sblock->fs_fsize / FFS_FSBTODB(sblock, 1); 860 sblk.b_bno = super / dev_bsize; 861 sblk.b_size = SBLOCKSIZE; 862 if (bflag) 863 goto out; 864 /* 865 * Set all possible fields that could differ, then do check 866 * of whole super block against an alternate super block-> 867 * When an alternate super-block is specified this check is skipped. 868 */ 869 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 870 if (asblk.b_errs) 871 return (0); 872 /* swap SB byte order if asked */ 873 if (doswap) 874 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 875 876 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 877 if (needswap) 878 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 879 if (altsblock->fs_magic == FS_UFS2EA_MAGIC) { 880 altsblock->fs_magic = FS_UFS2_MAGIC; 881 } 882 /* change on-disk magic if asked */ 883 cvt_magic(asblk.b_un.b_fs); 884 if (cmpsblks(sblock, altsblock)) { 885 if (debug) { 886 uint32_t *nlp, *olp, *endlp; 887 888 printf("superblock mismatches\n"); 889 nlp = (uint32_t *)altsblock; 890 olp = (uint32_t *)sblock; 891 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 892 for ( ; olp < endlp; olp++, nlp++) { 893 if (*olp == *nlp) 894 continue; 895 printf("offset %#x, original 0x%08x, alternate " 896 "0x%08x\n", 897 (int)((uint8_t *)olp-(uint8_t *)sblock), 898 *olp, *nlp); 899 } 900 } 901 badsb(listerr, 902 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 903 /* 904 return (0); 905 */ 906 } 907 out: 908 909 sb_oldfscompat_read(sblock, &sblocksave); 910 911 /* Now we know the SB is valid, we can write it back if needed */ 912 if (doswap || doing2ea || doing2noea) { 913 sbdirty(); 914 dirty(&asblk); 915 } 916 havesb = 1; 917 return (1); 918 } 919 920 int 921 cmpsblks(const struct fs *sb, struct fs *asb) 922 { 923 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 924 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 925 return cmpsblks42(sb, asb); 926 else 927 return cmpsblks44(sb, asb); 928 } 929 if (asb->fs_sblkno != sb->fs_sblkno || 930 asb->fs_cblkno != sb->fs_cblkno || 931 asb->fs_iblkno != sb->fs_iblkno || 932 asb->fs_dblkno != sb->fs_dblkno || 933 asb->fs_ncg != sb->fs_ncg || 934 asb->fs_bsize != sb->fs_bsize || 935 asb->fs_fsize != sb->fs_fsize || 936 asb->fs_frag != sb->fs_frag || 937 asb->fs_bmask != sb->fs_bmask || 938 asb->fs_fmask != sb->fs_fmask || 939 asb->fs_bshift != sb->fs_bshift || 940 asb->fs_fshift != sb->fs_fshift || 941 asb->fs_fragshift != sb->fs_fragshift || 942 asb->fs_fsbtodb != sb->fs_fsbtodb || 943 asb->fs_sbsize != sb->fs_sbsize || 944 asb->fs_nindir != sb->fs_nindir || 945 asb->fs_inopb != sb->fs_inopb || 946 asb->fs_cssize != sb->fs_cssize || 947 asb->fs_ipg != sb->fs_ipg || 948 asb->fs_fpg != sb->fs_fpg || 949 asb->fs_magic != sb->fs_magic) 950 return 1; 951 return 0; 952 } 953 954 /* BSD 4.2 performed the following superblock comparison 955 * It should correspond to FS_42POSTBLFMT 956 * (although note that in 4.2, the fs_old_postblformat 957 * field didn't exist and the corresponding bits are 958 * located near the end of the postbl itself, where they 959 * are not likely to be used.) 960 */ 961 int 962 cmpsblks42(const struct fs *sb, struct fs *asb) 963 { 964 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 965 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 966 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 967 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 968 asb->fs_cgrotor = sb->fs_cgrotor; 969 asb->fs_fmod = sb->fs_fmod; 970 asb->fs_clean = sb->fs_clean; 971 asb->fs_ronly = sb->fs_ronly; 972 asb->fs_old_flags = sb->fs_old_flags; 973 asb->fs_maxcontig = sb->fs_maxcontig; 974 asb->fs_minfree = sb->fs_minfree; 975 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 976 asb->fs_maxbpg = sb->fs_maxbpg; 977 978 /* The former fs_csp, totaling 128 bytes */ 979 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 980 asb->fs_contigdirs = sb->fs_contigdirs; 981 asb->fs_csp = sb->fs_csp; 982 asb->fs_maxcluster = sb->fs_maxcluster; 983 asb->fs_active = sb->fs_active; 984 985 /* The former fs_fsmnt, totaling 512 bytes */ 986 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 987 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 988 989 return memcmp(sb, asb, sb->fs_sbsize); 990 } 991 992 /* BSD 4.4 performed the following superblock comparison 993 * This was used in NetBSD through 1.6.1 994 * 995 * Note that this implementation is destructive to asb. 996 */ 997 int 998 cmpsblks44(const struct fs *sb, struct fs *asb) 999 { 1000 /* 1001 * "Copy fields which we don't care if they're different in the 1002 * alternate superblocks, as they're either likely to be 1003 * different because they're per-cylinder-group specific, or 1004 * because they're transient details which are only maintained 1005 * in the primary superblock." 1006 */ 1007 asb->fs_firstfield = sb->fs_firstfield; 1008 asb->fs_unused_1 = sb->fs_unused_1; 1009 asb->fs_old_time = sb->fs_old_time; 1010 asb->fs_old_cstotal = sb->fs_old_cstotal; 1011 asb->fs_cgrotor = sb->fs_cgrotor; 1012 asb->fs_fmod = sb->fs_fmod; 1013 asb->fs_clean = sb->fs_clean; 1014 asb->fs_ronly = sb->fs_ronly; 1015 asb->fs_old_flags = sb->fs_old_flags; 1016 asb->fs_maxcontig = sb->fs_maxcontig; 1017 asb->fs_minfree = sb->fs_minfree; 1018 asb->fs_optim = sb->fs_optim; 1019 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 1020 asb->fs_maxbpg = sb->fs_maxbpg; 1021 1022 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 1023 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 1024 asb->fs_contigdirs = sb->fs_contigdirs; 1025 asb->fs_csp = sb->fs_csp; 1026 asb->fs_maxcluster = sb->fs_maxcluster; 1027 asb->fs_active = sb->fs_active; 1028 1029 /* The former fs_fsmnt, totaling 512 bytes */ 1030 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 1031 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 1032 1033 /* The former fs_sparecon, totaling 200 bytes */ 1034 memmove(asb->fs_snapinum, 1035 sb->fs_snapinum, sizeof sb->fs_snapinum); 1036 asb->fs_avgfilesize = sb->fs_avgfilesize; 1037 asb->fs_avgfpdir = sb->fs_avgfpdir; 1038 asb->fs_save_cgsize = sb->fs_save_cgsize; 1039 memmove(asb->fs_sparecon32, 1040 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 1041 asb->fs_flags = sb->fs_flags; 1042 1043 /* Original comment: 1044 * "The following should not have to be copied, but need to be." 1045 */ 1046 asb->fs_fsbtodb = sb->fs_fsbtodb; 1047 asb->fs_old_interleave = sb->fs_old_interleave; 1048 asb->fs_old_npsect = sb->fs_old_npsect; 1049 asb->fs_old_nrpos = sb->fs_old_nrpos; 1050 asb->fs_state = sb->fs_state; 1051 asb->fs_qbmask = sb->fs_qbmask; 1052 asb->fs_qfmask = sb->fs_qfmask; 1053 asb->fs_state = sb->fs_state; 1054 asb->fs_maxfilesize = sb->fs_maxfilesize; 1055 1056 /* 1057 * "Compare the superblocks, effectively checking every other 1058 * field to see if they differ." 1059 */ 1060 return memcmp(sb, asb, sb->fs_sbsize); 1061 } 1062 1063 1064 static void 1065 badsb(int listerr, const char *s) 1066 { 1067 1068 if (!listerr) 1069 return; 1070 if (preen) 1071 printf("%s: ", cdevname()); 1072 pfatal("BAD SUPER BLOCK: %s\n", s); 1073 } 1074 1075 /* 1076 * Calculate a prototype superblock based on information in the disk label. 1077 * When done the cgsblock macro can be calculated and the fs_ncg field 1078 * can be used. Do NOT attempt to use other macros without verifying that 1079 * their needed information is available! 1080 */ 1081 static int 1082 calcsb(const char *dev, int devfd, struct fs *fs) 1083 { 1084 struct dkwedge_info dkw; 1085 struct disk_geom geo; 1086 int i, nspf; 1087 1088 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1) 1089 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1090 if (dkw.dkw_parent[0] == '\0') { 1091 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 1092 return (0); 1093 } 1094 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) 1095 #ifndef NO_APPLE_UFS 1096 && strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) 1097 #endif 1098 ) { 1099 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 1100 dev, dkw.dkw_ptype); 1101 return (0); 1102 } 1103 if (geo.dg_secsize == 0) { 1104 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev); 1105 return 0; 1106 } 1107 if (geo.dg_secpercyl == 0) { 1108 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev); 1109 return 0; 1110 } 1111 if (sblk.b_un.b_fs->fs_fsize == 0) { 1112 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev); 1113 return 0; 1114 } 1115 if (sblk.b_un.b_fs->fs_fpg == 0) { 1116 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev); 1117 return 0; 1118 } 1119 if (sblk.b_un.b_fs->fs_old_cpg == 0) { 1120 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev); 1121 return 0; 1122 } 1123 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs)); 1124 nspf = fs->fs_fsize / geo.dg_secsize; 1125 fs->fs_old_nspf = nspf; 1126 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 1127 fs->fs_fsbtodb++; 1128 dev_bsize = geo.dg_secsize; 1129 if (fs->fs_magic == FS_UFS2_MAGIC) { 1130 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 1131 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 1132 fs->fs_old_cgmask = 0xffffffff; 1133 for (i = geo.dg_ntracks; i > 1; i >>= 1) 1134 fs->fs_old_cgmask <<= 1; 1135 if (!POWEROF2(geo.dg_ntracks)) 1136 fs->fs_old_cgmask <<= 1; 1137 fs->fs_old_cgoffset = roundup( 1138 howmany(geo.dg_nsectors, nspf), fs->fs_frag); 1139 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf; 1140 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl, 1141 fs->fs_old_cpg); 1142 } 1143 return (1); 1144 } 1145 1146 /* 1147 * Test the list of snapshot inode numbers for duplicates and repair. 1148 */ 1149 static int 1150 check_snapinum(void) 1151 { 1152 int loc, loc2, res; 1153 uint32_t *snapinum = &sblock->fs_snapinum[0]; 1154 1155 res = 0; 1156 1157 if (isappleufs) 1158 return 0; 1159 1160 for (loc = 0; loc < FSMAXSNAP; loc++) { 1161 if (snapinum[loc] == 0) 1162 break; 1163 for (loc2 = loc + 1; loc2 < FSMAXSNAP; loc2++) { 1164 if (snapinum[loc2] == 0 || 1165 snapinum[loc2] == snapinum[loc]) 1166 break; 1167 } 1168 if (loc2 >= FSMAXSNAP || snapinum[loc2] == 0) 1169 continue; 1170 pwarn("SNAPSHOT INODE %u ALREADY ON LIST%s", snapinum[loc2], 1171 (res ? "" : "\n")); 1172 res = 1; 1173 for (loc2 = loc + 1; loc2 < FSMAXSNAP; loc2++) { 1174 if (snapinum[loc2] == 0) 1175 break; 1176 snapinum[loc2 - 1] = snapinum[loc2]; 1177 } 1178 snapinum[loc2 - 1] = 0; 1179 loc--; 1180 } 1181 1182 return res; 1183 } 1184
Indexes created Fri Sep 26 20:09:58 GMT 2025