1/* $NetBSD: setup.c,v 1.109 2023/07/05 10:59:08 riastradh 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 1.109 2023/07/05 10:59:08 riastradh 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); 73#ifndef NO_APPLE_UFS 74static int readappleufs(void); 75#endif 76static int check_snapinum(void); 77 78int16_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 */ 85int 86setup(const char *dev, const char *origdev) 87{ 88 uint32_t cg; 89 long size, asked, i, j; 90 long bmapsize; 91 struct disk_geom geo; 92 struct dkwedge_info dkw; 93 off_t sizepb; 94 struct stat statb; 95 struct fs proto; 96 int doskipclean; 97 u_int64_t maxfilesize; 98 struct csum *ccsp; 99 int fd; 100 101 havesb = 0; 102 fswritefd = -1; 103 doskipclean = skipclean; 104 if (stat(dev, &statb) < 0) { 105 printf("Can't stat %s: %s\n", dev, strerror(errno)); 106 return (0); 107 } 108 if (!forceimage && !S_ISCHR(statb.st_mode)) { 109 pfatal("%s is not a character device", dev); 110 if (reply("CONTINUE") == 0) 111 return (0); 112 } 113 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 114 printf("Can't open %s: %s\n", dev, strerror(errno)); 115 return (0); 116 } 117 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 118 fswritefd = -1; 119 if (preen) 120 pfatal("NO WRITE ACCESS"); 121 printf("** %s (NO WRITE)\n", dev); 122 quiet = 0; 123 } else 124 if (!preen && !quiet) 125 printf("** %s\n", dev); 126 fsmodified = 0; 127 lfdir = 0; 128 initbarea(&sblk); 129 initbarea(&asblk); 130 sblk.b_un.b_buf = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 131 sblock = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 132 asblk.b_un.b_buf = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 133 altsblock = aligned_alloc(DEV_BSIZE, SBLOCKSIZE); 134 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 135 sblock == NULL || altsblock == NULL) 136 errexit("Cannot allocate space for superblock"); 137 if (strcmp(dev, origdev) && !forceimage) { 138 /* 139 * dev isn't the original fs (for example it's a snapshot) 140 * do getdiskinfo on the original device 141 */ 142 fd = open(origdev, O_RDONLY); 143 if (fd < 0) { 144 warn("Can't open %s", origdev); 145 return (0); 146 } 147 } else { 148 fd = fsreadfd; 149 } 150 if (!forceimage && getdiskinfo(origdev, fd, NULL, &geo, &dkw) != -1) 151 dev_bsize = secsize = geo.dg_secsize; 152 else 153 dev_bsize = secsize = DEV_BSIZE; 154 /* 155 * Read in the superblock, looking for alternates if necessary 156 */ 157 if (readsb(1) == 0) { 158 if (bflag || preen || forceimage || 159 calcsb(dev, fsreadfd, &proto) == 0) 160 return(0); 161 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 162 return (0); 163 for (cg = 0; cg < proto.fs_ncg; cg++) { 164 bflag = FFS_FSBTODB(&proto, cgsblock(&proto, cg)); 165 if (readsb(0) != 0) 166 break; 167 } 168 if (cg >= proto.fs_ncg) { 169 printf("%s %s\n%s %s\n%s %s\n", 170 "SEARCH FOR ALTERNATE SUPER-BLOCK", 171 "FAILED. YOU MUST USE THE", 172 "-b OPTION TO fsck_ffs TO SPECIFY THE", 173 "LOCATION OF AN ALTERNATE", 174 "SUPER-BLOCK TO SUPPLY NEEDED", 175 "INFORMATION; SEE fsck_ffs(8)."); 176 return(0); 177 } 178 doskipclean = 0; 179 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 180 } 181 182 if (!quota2_check_doquota()) 183 doskipclean = 0; 184 185 /* ffs_superblock_layout() == 2 */ 186 if (sblock->fs_magic != FS_UFS1_MAGIC || 187 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) { 188 /* can have WAPBL */ 189 if (check_wapbl() != 0) { 190 doskipclean = 0; 191 } 192 if (sblock->fs_flags & FS_DOWAPBL) { 193 if (preen && doskipclean) { 194 if (!quiet) 195 pwarn("file system is journaled; " 196 "not checking\n"); 197 return (-1); 198 } 199 if (!quiet) 200 pwarn("** File system is journaled; " 201 "replaying journal\n"); 202 replay_wapbl(); 203 doskipclean = 0; 204 sblock->fs_flags &= ~FS_DOWAPBL; 205 sbdirty(); 206 /* Although we may have updated the superblock from 207 * the journal, we are still going to do a full check, 208 * so we don't bother to re-read the superblock from 209 * the journal. 210 * XXX, instead we could re-read the superblock and 211 * then not force doskipclean = 0 212 */ 213 } 214 } 215 if (debug) 216 printf("clean = %d\n", sblock->fs_clean); 217 218 if (doswap) 219 doskipclean = 0; 220 221 if (sblock->fs_clean & FS_ISCLEAN) { 222 if (doskipclean) { 223 if (!quiet) 224 pwarn("%sile system is clean; not checking\n", 225 preen ? "f" : "** F"); 226 return (-1); 227 } 228 if (!preen && !doswap) 229 pwarn("** File system is already clean\n"); 230 } 231 maxfsblock = sblock->fs_size; 232 maxino = sblock->fs_ncg * sblock->fs_ipg; 233 sizepb = sblock->fs_bsize; 234 maxfilesize = sblock->fs_bsize * UFS_NDADDR - 1; 235 for (i = 0; i < UFS_NIADDR; i++) { 236 sizepb *= FFS_NINDIR(sblock); 237 maxfilesize += sizepb; 238 } 239 if ((!is_ufs2 && cvtlevel >= 4) && 240 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) { 241 if (preen) 242 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n"); 243 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT")) 244 return(0); 245 sblock->fs_old_flags |= FS_FLAGS_UPDATED; 246 /* Disable the postbl tables */ 247 sblock->fs_old_cpc = 0; 248 sblock->fs_old_nrpos = 1; 249 sblock->fs_old_trackskew = 0; 250 /* The other fields have already been updated by 251 * sb_oldfscompat_read 252 */ 253 sbdirty(); 254 } 255 if (!is_ufs2 && cvtlevel == 3 && 256 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) { 257 if (preen) 258 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n"); 259 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT")) 260 return(0); 261 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; 262 sb_oldfscompat_write(sblock, sblock); 263 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */ 264 /* Leave postbl tables disabled, but blank its superblock region anyway */ 265 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 266 sblock->fs_old_cpc = 0; 267 sblock->fs_old_nrpos = 1; 268 sblock->fs_old_trackskew = 0; 269 memset(&sblock->fs_old_postbl_start, 0xff, 256); 270 sb_oldfscompat_read(sblock, &sblocksave); 271 sbdirty(); 272 } 273 /* 274 * Check and potentially fix certain fields in the super block. 275 */ 276 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) { 277 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags); 278 if (reply("CLEAR") == 1) { 279 sblock->fs_flags &= FS_KNOWN_FLAGS; 280 sbdirty(); 281 } 282 } 283 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 284 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 285 if (reply("SET TO DEFAULT") == 1) { 286 sblock->fs_optim = FS_OPTTIME; 287 sbdirty(); 288 } 289 } 290 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 291 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 292 sblock->fs_minfree); 293 if (reply("SET TO DEFAULT") == 1) { 294 sblock->fs_minfree = 10; 295 sbdirty(); 296 } 297 } 298 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 299 (sblock->fs_old_interleave < 1 || 300 sblock->fs_old_interleave > sblock->fs_old_nsect)) { 301 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 302 sblock->fs_old_interleave); 303 sblock->fs_old_interleave = 1; 304 if (preen) 305 printf(" (FIXED)\n"); 306 if (preen || reply("SET TO DEFAULT") == 1) { 307 sbdirty(); 308 dirty(&asblk); 309 } 310 } 311 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT && 312 (sblock->fs_old_npsect < sblock->fs_old_nsect || 313 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) { 314 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 315 sblock->fs_old_npsect); 316 sblock->fs_old_npsect = sblock->fs_old_nsect; 317 if (preen) 318 printf(" (FIXED)\n"); 319 if (preen || reply("SET TO DEFAULT") == 1) { 320 sbdirty(); 321 dirty(&asblk); 322 } 323 } 324 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 325 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 326 sblock->fs_bmask); 327 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 328 if (preen) 329 printf(" (FIXED)\n"); 330 if (preen || reply("FIX") == 1) { 331 sbdirty(); 332 dirty(&asblk); 333 } 334 } 335 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 336 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 337 sblock->fs_fmask); 338 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 339 if (preen) 340 printf(" (FIXED)\n"); 341 if (preen || reply("FIX") == 1) { 342 sbdirty(); 343 dirty(&asblk); 344 } 345 } 346 if (check_snapinum()) { 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_old_inodefmt >= FS_44INODEFMT) { 355 if (sblock->fs_maxfilesize != maxfilesize) { 356 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 357 (unsigned long long)sblock->fs_maxfilesize); 358 sblock->fs_maxfilesize = maxfilesize; 359 if (preen) 360 printf(" (FIXED)\n"); 361 if (preen || reply("FIX") == 1) { 362 sbdirty(); 363 dirty(&asblk); 364 } 365 } 366 if ((is_ufs2 && sblock->fs_maxsymlinklen != UFS2_MAXSYMLINKLEN) 367 || 368 (!is_ufs2 && sblock->fs_maxsymlinklen != UFS1_MAXSYMLINKLEN)) 369 { 370 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 371 sblock->fs_maxsymlinklen); 372 sblock->fs_maxsymlinklen = is_ufs2 ? 373 UFS2_MAXSYMLINKLEN : UFS1_MAXSYMLINKLEN; 374 if (preen) 375 printf(" (FIXED)\n"); 376 if (preen || reply("FIX") == 1) { 377 sbdirty(); 378 dirty(&asblk); 379 } 380 } 381 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 382 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK", 383 (unsigned long long)sblock->fs_qbmask); 384 sblock->fs_qbmask = ~sblock->fs_bmask; 385 if (preen) 386 printf(" (FIXED)\n"); 387 if (preen || reply("FIX") == 1) { 388 sbdirty(); 389 dirty(&asblk); 390 } 391 } 392 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 393 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK", 394 (unsigned long long)sblock->fs_qfmask); 395 sblock->fs_qfmask = ~sblock->fs_fmask; 396 if (preen) 397 printf(" (FIXED)\n"); 398 if (preen || reply("FIX") == 1) { 399 sbdirty(); 400 dirty(&asblk); 401 } 402 } 403 newinofmt = 1; 404 } else { 405 sblock->fs_qbmask = ~sblock->fs_bmask; 406 sblock->fs_qfmask = ~sblock->fs_fmask; 407 newinofmt = 0; 408 } 409 /* 410 * Convert to new inode format. 411 */ 412 if (!is_ufs2 && cvtlevel >= 2 && 413 sblock->fs_old_inodefmt < FS_44INODEFMT) { 414 if (preen) 415 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 416 else if (!reply("CONVERT TO NEW INODE FORMAT")) 417 return(0); 418 doinglevel2++; 419 sblock->fs_old_inodefmt = FS_44INODEFMT; 420 sblock->fs_maxfilesize = maxfilesize; 421 sblock->fs_maxsymlinklen = UFS1_MAXSYMLINKLEN; 422 sblock->fs_qbmask = ~sblock->fs_bmask; 423 sblock->fs_qfmask = ~sblock->fs_fmask; 424 sbdirty(); 425 dirty(&asblk); 426 } 427 /* 428 * Convert to new cylinder group format. 429 */ 430 if (!is_ufs2 && cvtlevel >= 1 && 431 sblock->fs_old_postblformat == FS_42POSTBLFMT) { 432 if (preen) 433 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 434 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 435 return(0); 436 doinglevel1++; 437 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT; 438 sblock->fs_old_nrpos = 8; 439 sblock->fs_old_postbloff = 440 (char *)(&sblock->fs_old_postbl_start) - 441 (char *)(&sblock->fs_firstfield); 442 sblock->fs_old_rotbloff = 443 (char *)(&sblock->fs_magic+1) - 444 (char *)(&sblock->fs_firstfield); 445 sblock->fs_cgsize = 446 ffs_fragroundup(sblock, CGSIZE(sblock)); 447 sbdirty(); 448 dirty(&asblk); 449 } 450 if (asblk.b_dirty && !bflag) { 451 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE); 452 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave); 453 if (needswap) 454 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 455 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 456 flush(fswritefd, &asblk); 457 } 458 /* 459 * read in the summary info. 460 */ 461 asked = 0; 462 sblock->fs_csp = (struct csum *)aligned_alloc(DEV_BSIZE, 463 sblock->fs_cssize); 464 if (sblock->fs_csp == NULL) { 465 pwarn("cannot alloc %u bytes for summary info\n", 466 sblock->fs_cssize); 467 goto badsblabel; 468 } 469 memset(sblock->fs_csp, 0, sblock->fs_cssize); 470 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 471 size = sblock->fs_cssize - i < sblock->fs_bsize ? 472 sblock->fs_cssize - i : sblock->fs_bsize; 473 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 474 if (bread(fsreadfd, (char *)ccsp, 475 FFS_FSBTODB(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 476 size) != 0 && !asked) { 477 pfatal("BAD SUMMARY INFORMATION"); 478 if (reply("CONTINUE") == 0) { 479 markclean = 0; 480 exit(FSCK_EXIT_CHECK_FAILED); 481 } 482 asked++; 483 } 484 if (doswap) { 485 ffs_csum_swap(ccsp, ccsp, size); 486 bwrite(fswritefd, (char *)ccsp, 487 FFS_FSBTODB(sblock, 488 sblock->fs_csaddr + j * sblock->fs_frag), 489 size); 490 } 491 if (needswap) 492 ffs_csum_swap(ccsp, ccsp, size); 493 } 494 /* 495 * allocate and initialize the necessary maps 496 */ 497 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 498 blockmap = aligned_alloc(DEV_BSIZE, (unsigned)bmapsize); 499 if (blockmap == NULL) { 500 pwarn("cannot alloc %u bytes for blockmap\n", 501 (unsigned)bmapsize); 502 goto badsblabel; 503 } 504 memset(blockmap, 0, bmapsize); 505 inostathead = calloc((unsigned)(sblock->fs_ncg), 506 sizeof(struct inostatlist)); 507 if (inostathead == NULL) { 508 pwarn("cannot alloc %u bytes for inostathead\n", 509 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg))); 510 goto badsblabel; 511 } 512 /* 513 * cs_ndir may be inaccurate, particularly if we're using the -b 514 * option, so set a minimum to prevent bogus subdirectory reconnects 515 * and really inefficient directory scans. 516 * Also set a maximum in case the value is too large. 517 */ 518 numdirs = sblock->fs_cstotal.cs_ndir; 519 if (numdirs < 1024) 520 numdirs = 1024; 521 if ((ino_t)numdirs > maxino + 1) 522 numdirs = maxino + 1; 523 dirhash = numdirs; 524 inplast = 0; 525 listmax = numdirs + 10; 526 inpsort = calloc((unsigned)listmax, sizeof(*inpsort)); 527 inphead = calloc((unsigned)numdirs, sizeof(*inphead)); 528 if (inpsort == NULL || inphead == NULL) { 529 pwarn("cannot alloc %u bytes for inphead\n", 530 (unsigned)(numdirs * sizeof(struct inoinfo *))); 531 goto badsblabel; 532 } 533 cgrp = aligned_alloc(DEV_BSIZE, sblock->fs_cgsize); 534 if (cgrp == NULL) { 535 pwarn("cannot alloc %u bytes for cylinder group\n", 536 sblock->fs_cgsize); 537 goto badsblabel; 538 } 539 bufinit(); 540 if (sblock->fs_flags & FS_DOSOFTDEP) 541 usedsoftdep = 1; 542 else 543 usedsoftdep = 0; 544 545#ifndef NO_APPLE_UFS 546 if (!forceimage && dkw.dkw_parent[0]) 547 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0) 548 isappleufs = 1; 549 550 if (readappleufs()) 551 isappleufs = 1; 552#endif 553 554 if (isappleufs) 555 dirblksiz = APPLEUFS_DIRBLKSIZ; 556 else 557 dirblksiz = UFS_DIRBLKSIZ; 558 559 if (debug) 560#ifndef NO_APPLE_UFS 561 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz); 562#else 563 printf("dirblksiz = %d\n", dirblksiz); 564#endif 565 566 if (sblock->fs_flags & FS_DOQUOTA2) { 567 /* allocate the quota hash table */ 568 /* 569 * first compute the size of the hash table 570 * We know the smallest block size is 4k, so we can use 2k 571 * for the hash table; as an entry is 8 bytes we can store 572 * 256 entries. So let start q2h_hash_shift at 8 573 */ 574 for (q2h_hash_shift = 8; 575 q2h_hash_shift < 15; 576 q2h_hash_shift++) { 577 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) + 578 sizeof(struct quota2_header) > 579 (size_t)sblock->fs_bsize) 580 break; 581 } 582 q2h_hash_mask = (1 << q2h_hash_shift) - 1; 583 if (debug) { 584 printf("quota hash shift %d, %d entries, mask 0x%x\n", 585 q2h_hash_shift, (1 << q2h_hash_shift), 586 q2h_hash_mask); 587 } 588 uquot_user_hash = 589 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 590 uquot_group_hash = 591 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash)); 592 if (uquot_user_hash == NULL || uquot_group_hash == NULL) 593 errexit("Cannot allocate space for quotas hash\n"); 594 } else { 595 uquot_user_hash = uquot_group_hash = NULL; 596 q2h_hash_shift = q2h_hash_mask = 0; 597 } 598 return (1); 599badsblabel: 600 markclean=0; 601 ckfini(1); 602 return (0); 603} 604 605#ifndef NO_APPLE_UFS 606static int 607readappleufs(void) 608{ 609 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize; 610 struct appleufslabel *appleufs; 611 int i; 612 613 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not 614 * being block aligned (CD's?) 615 */ 616 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0) 617 return 0; 618 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label, 619 (long)APPLEUFS_LABEL_SIZE) != 0) 620 return 0; 621 appleufsblk.b_bno = label; 622 appleufsblk.b_size = APPLEUFS_LABEL_SIZE; 623 624 appleufs = appleufsblk.b_un.b_appleufs; 625 626 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) { 627 if (!isappleufs) { 628 return 0; 629 } else { 630 pfatal("MISSING APPLEUFS VOLUME LABEL\n"); 631 if (reply("FIX") == 0) { 632 return 1; 633 } 634 ffs_appleufs_set(appleufs, NULL, -1, 0); 635 appleufsdirty(); 636 } 637 } 638 639 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) { 640 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)", 641 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION); 642 if (preen) { 643 printf(" (CORRECTED)\n"); 644 } 645 if (preen || reply("CORRECT")) { 646 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION); 647 appleufsdirty(); 648 } 649 } 650 651 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) { 652 pwarn("APPLE UFS LABEL NAME TOO LONG"); 653 if (preen) { 654 printf(" (TRUNCATED)\n"); 655 } 656 if (preen || reply("TRUNCATE")) { 657 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME); 658 appleufsdirty(); 659 } 660 } 661 662 if (ntohs(appleufs->ul_namelen) == 0) { 663 pwarn("MISSING APPLE UFS LABEL NAME"); 664 if (preen) { 665 printf(" (FIXED)\n"); 666 } 667 if (preen || reply("FIX")) { 668 ffs_appleufs_set(appleufs, NULL, -1, 0); 669 appleufsdirty(); 670 } 671 } 672 673 /* Scan name for first illegal character */ 674 for (i=0;i<ntohs(appleufs->ul_namelen);i++) { 675 if ((appleufs->ul_name[i] == '\0') || 676 (appleufs->ul_name[i] == ':') || 677 (appleufs->ul_name[i] == '/')) { 678 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER"); 679 if (preen) { 680 printf(" (TRUNCATED)\n"); 681 } 682 if (preen || reply("TRUNCATE")) { 683 appleufs->ul_namelen = i+1; 684 appleufsdirty(); 685 } 686 break; 687 } 688 } 689 690 /* Check the checksum last, because if anything else was wrong, 691 * then the checksum gets reset anyway. 692 */ 693 appleufs->ul_checksum = 0; 694 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs); 695 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) { 696 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)", 697 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum); 698 if (preen) { 699 printf(" (CORRECTED)\n"); 700 } 701 if (preen || reply("CORRECT")) { 702 appleufsdirty(); 703 } else { 704 /* put the incorrect checksum back in place */ 705 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum; 706 } 707 } 708 return 1; 709} 710#endif /* !NO_APPLE_UFS */ 711 712/* 713 * Detect byte order. Return 0 if valid magic found, -1 otherwise. 714 */ 715static int 716detect_byteorder(struct fs *fs, int sblockoff) 717{ 718 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC || 719 fs->fs_magic == FS_UFS1_MAGIC_SWAPPED)) 720 /* Likely to be the first alternate of a fs with 64k blocks */ 721 return -1; 722 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC || 723 fs->fs_magic == FS_UFS2EA_MAGIC) { 724#ifndef NO_FFS_EI 725 if (endian == 0 || BYTE_ORDER == endian) { 726 needswap = 0; 727 doswap = do_blkswap = do_dirswap = 0; 728 } else { 729 needswap = 1; 730 doswap = do_blkswap = do_dirswap = 1; 731 } 732#endif 733 return 0; 734 } 735#ifndef NO_FFS_EI 736 else if (fs->fs_magic == FS_UFS1_MAGIC_SWAPPED || 737 fs->fs_magic == FS_UFS2_MAGIC_SWAPPED || 738 fs->fs_magic == FS_UFS2EA_MAGIC_SWAPPED) { 739 if (endian == 0 || BYTE_ORDER != endian) { 740 needswap = 1; 741 doswap = do_blkswap = do_dirswap = 0; 742 } else { 743 needswap = 0; 744 doswap = do_blkswap = do_dirswap = 1; 745 } 746 return 0; 747 } 748#endif 749 return -1; 750} 751 752/* Update on-disk fs->fs_magic if we are converting */ 753void 754cvt_magic(struct fs *fs) 755{ 756 757 if (is_ufs2ea || doing2ea) { 758 if (fs->fs_magic == FS_UFS2_MAGIC) { 759 fs->fs_magic = FS_UFS2EA_MAGIC; 760 } 761 if (fs->fs_magic == FS_UFS2_MAGIC_SWAPPED) { 762 fs->fs_magic = FS_UFS2EA_MAGIC_SWAPPED; 763 } 764 } 765 if (doing2noea) { 766 if (fs->fs_magic == FS_UFS2EA_MAGIC) { 767 fs->fs_magic = FS_UFS2_MAGIC; 768 } 769 if (fs->fs_magic == FS_UFS2EA_MAGIC_SWAPPED) { 770 fs->fs_magic = FS_UFS2_MAGIC_SWAPPED; 771 } 772 } 773} 774 775/* 776 * Possible superblock locations ordered from most to least likely. 777 */ 778static off_t sblock_try[] = SBLOCKSEARCH; 779 780/* 781 * Read in the super block and its summary info. 782 */ 783static int 784readsb(int listerr) 785{ 786 daddr_t super = 0; 787 struct fs *fs; 788 int i; 789 790 if (bflag) { 791 super = bflag; 792 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, 793 (long)SBLOCKSIZE) != 0) 794 return (0); 795 fs = sblk.b_un.b_fs; 796 if (detect_byteorder(fs, -1) < 0) { 797 badsb(listerr, "MAGIC NUMBER WRONG"); 798 return (0); 799 } 800 } else { 801 for (i = 0; sblock_try[i] != -1; i++) { 802 super = sblock_try[i] / dev_bsize; 803 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, 804 super, (long)SBLOCKSIZE) != 0) 805 continue; 806 fs = sblk.b_un.b_fs; 807 if (detect_byteorder(fs, sblock_try[i]) == 0) 808 break; 809 } 810 if (sblock_try[i] == -1) { 811 badsb(listerr, "CAN'T FIND SUPERBLOCK"); 812 return (0); 813 } 814 } 815 if (doswap) { 816 if (preen) 817 errx(FSCK_EXIT_USAGE, 818 "Incompatible options -B and -p"); 819 if (nflag) 820 errx(FSCK_EXIT_USAGE, 821 "Incompatible options -B and -n"); 822 if (endian == LITTLE_ENDIAN) { 823 if (!reply("CONVERT TO LITTLE ENDIAN")) 824 return 0; 825 } else if (endian == BIG_ENDIAN) { 826 if (!reply("CONVERT TO BIG ENDIAN")) 827 return 0; 828 } else 829 pfatal("INTERNAL ERROR: unknown endian"); 830 } 831 if (needswap) 832 pwarn("** Swapped byte order\n"); 833 /* swap SB byte order if asked */ 834 if (doswap) 835 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 836 837 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE); 838 if (needswap) 839 ffs_sb_swap(sblk.b_un.b_fs, sblock); 840 if (sblock->fs_magic == FS_UFS2EA_MAGIC) { 841 is_ufs2ea = 1; 842 sblock->fs_magic = FS_UFS2_MAGIC; 843 } 844 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC; 845 846 /* change on-disk magic if asked */ 847 cvt_magic(fs); 848 849 /* 850 * run a few consistency checks of the super block 851 */ 852 if (sblock->fs_sbsize > SBLOCKSIZE) 853 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 854 /* 855 * Compute block size that the filesystem is based on, 856 * according to FFS_FSBTODB, and adjust superblock block number 857 * so we can tell if this is an alternate later. 858 */ 859 super *= dev_bsize; 860 dev_bsize = sblock->fs_fsize / FFS_FSBTODB(sblock, 1); 861 sblk.b_bno = super / dev_bsize; 862 sblk.b_size = SBLOCKSIZE; 863 if (bflag) 864 goto out; 865 /* 866 * Set all possible fields that could differ, then do check 867 * of whole super block against an alternate super block-> 868 * When an alternate super-block is specified this check is skipped. 869 */ 870 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 871 if (asblk.b_errs) 872 return (0); 873 /* swap SB byte order if asked */ 874 if (doswap) 875 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 876 877 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 878 if (needswap) 879 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 880 if (altsblock->fs_magic == FS_UFS2EA_MAGIC) { 881 altsblock->fs_magic = FS_UFS2_MAGIC; 882 } 883 /* change on-disk magic if asked */ 884 cvt_magic(asblk.b_un.b_fs); 885 if (cmpsblks(sblock, altsblock)) { 886 if (debug) { 887 uint32_t *nlp, *olp, *endlp; 888 889 printf("superblock mismatches\n"); 890 nlp = (uint32_t *)altsblock; 891 olp = (uint32_t *)sblock; 892 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 893 for ( ; olp < endlp; olp++, nlp++) { 894 if (*olp == *nlp) 895 continue; 896 printf("offset %#x, original 0x%08x, alternate " 897 "0x%08x\n", 898 (int)((uint8_t *)olp-(uint8_t *)sblock), 899 *olp, *nlp); 900 } 901 } 902 badsb(listerr, 903 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 904/* 905 return (0); 906*/ 907 } 908out: 909 910 sb_oldfscompat_read(sblock, &sblocksave); 911 912 /* Now we know the SB is valid, we can write it back if needed */ 913 if (doswap || doing2ea || doing2noea) { 914 sbdirty(); 915 dirty(&asblk); 916 } 917 havesb = 1; 918 return (1); 919} 920 921int 922cmpsblks(const struct fs *sb, struct fs *asb) 923{ 924 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) { 925 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT) 926 return cmpsblks42(sb, asb); 927 else 928 return cmpsblks44(sb, asb); 929 } 930 if (asb->fs_sblkno != sb->fs_sblkno || 931 asb->fs_cblkno != sb->fs_cblkno || 932 asb->fs_iblkno != sb->fs_iblkno || 933 asb->fs_dblkno != sb->fs_dblkno || 934 asb->fs_ncg != sb->fs_ncg || 935 asb->fs_bsize != sb->fs_bsize || 936 asb->fs_fsize != sb->fs_fsize || 937 asb->fs_frag != sb->fs_frag || 938 asb->fs_bmask != sb->fs_bmask || 939 asb->fs_fmask != sb->fs_fmask || 940 asb->fs_bshift != sb->fs_bshift || 941 asb->fs_fshift != sb->fs_fshift || 942 asb->fs_fragshift != sb->fs_fragshift || 943 asb->fs_fsbtodb != sb->fs_fsbtodb || 944 asb->fs_sbsize != sb->fs_sbsize || 945 asb->fs_nindir != sb->fs_nindir || 946 asb->fs_inopb != sb->fs_inopb || 947 asb->fs_cssize != sb->fs_cssize || 948 asb->fs_ipg != sb->fs_ipg || 949 asb->fs_fpg != sb->fs_fpg || 950 asb->fs_magic != sb->fs_magic) 951 return 1; 952 return 0; 953} 954 955/* BSD 4.2 performed the following superblock comparison 956 * It should correspond to FS_42POSTBLFMT 957 * (although note that in 4.2, the fs_old_postblformat 958 * field didn't exist and the corresponding bits are 959 * located near the end of the postbl itself, where they 960 * are not likely to be used.) 961 */ 962int 963cmpsblks42(const struct fs *sb, struct fs *asb) 964{ 965 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */ 966 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */ 967 asb->fs_old_time = sb->fs_old_time; /* fs_time */ 968 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */ 969 asb->fs_cgrotor = sb->fs_cgrotor; 970 asb->fs_fmod = sb->fs_fmod; 971 asb->fs_clean = sb->fs_clean; 972 asb->fs_ronly = sb->fs_ronly; 973 asb->fs_old_flags = sb->fs_old_flags; 974 asb->fs_maxcontig = sb->fs_maxcontig; 975 asb->fs_minfree = sb->fs_minfree; 976 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 977 asb->fs_maxbpg = sb->fs_maxbpg; 978 979 /* The former fs_csp, totaling 128 bytes */ 980 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 981 asb->fs_contigdirs = sb->fs_contigdirs; 982 asb->fs_csp = sb->fs_csp; 983 asb->fs_maxcluster = sb->fs_maxcluster; 984 asb->fs_active = sb->fs_active; 985 986 /* The former fs_fsmnt, totaling 512 bytes */ 987 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 988 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 989 990 return memcmp(sb, asb, sb->fs_sbsize); 991} 992 993/* BSD 4.4 performed the following superblock comparison 994 * This was used in NetBSD through 1.6.1 995 * 996 * Note that this implementation is destructive to asb. 997 */ 998int 999cmpsblks44(const struct fs *sb, struct fs *asb) 1000{ 1001 /* 1002 * "Copy fields which we don't care if they're different in the 1003 * alternate superblocks, as they're either likely to be 1004 * different because they're per-cylinder-group specific, or 1005 * because they're transient details which are only maintained 1006 * in the primary superblock." 1007 */ 1008 asb->fs_firstfield = sb->fs_firstfield; 1009 asb->fs_unused_1 = sb->fs_unused_1; 1010 asb->fs_old_time = sb->fs_old_time; 1011 asb->fs_old_cstotal = sb->fs_old_cstotal; 1012 asb->fs_cgrotor = sb->fs_cgrotor; 1013 asb->fs_fmod = sb->fs_fmod; 1014 asb->fs_clean = sb->fs_clean; 1015 asb->fs_ronly = sb->fs_ronly; 1016 asb->fs_old_flags = sb->fs_old_flags; 1017 asb->fs_maxcontig = sb->fs_maxcontig; 1018 asb->fs_minfree = sb->fs_minfree; 1019 asb->fs_optim = sb->fs_optim; 1020 asb->fs_old_rotdelay = sb->fs_old_rotdelay; 1021 asb->fs_maxbpg = sb->fs_maxbpg; 1022 1023 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */ 1024 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 1025 asb->fs_contigdirs = sb->fs_contigdirs; 1026 asb->fs_csp = sb->fs_csp; 1027 asb->fs_maxcluster = sb->fs_maxcluster; 1028 asb->fs_active = sb->fs_active; 1029 1030 /* The former fs_fsmnt, totaling 512 bytes */ 1031 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 1032 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname); 1033 1034 /* The former fs_sparecon, totaling 200 bytes */ 1035 memmove(asb->fs_snapinum, 1036 sb->fs_snapinum, sizeof sb->fs_snapinum); 1037 asb->fs_avgfilesize = sb->fs_avgfilesize; 1038 asb->fs_avgfpdir = sb->fs_avgfpdir; 1039 asb->fs_save_cgsize = sb->fs_save_cgsize; 1040 memmove(asb->fs_sparecon32, 1041 sb->fs_sparecon32, sizeof sb->fs_sparecon32); 1042 asb->fs_flags = sb->fs_flags; 1043 1044 /* Original comment: 1045 * "The following should not have to be copied, but need to be." 1046 */ 1047 asb->fs_fsbtodb = sb->fs_fsbtodb; 1048 asb->fs_old_interleave = sb->fs_old_interleave; 1049 asb->fs_old_npsect = sb->fs_old_npsect; 1050 asb->fs_old_nrpos = sb->fs_old_nrpos; 1051 asb->fs_state = sb->fs_state; 1052 asb->fs_qbmask = sb->fs_qbmask; 1053 asb->fs_qfmask = sb->fs_qfmask; 1054 asb->fs_state = sb->fs_state; 1055 asb->fs_maxfilesize = sb->fs_maxfilesize; 1056 1057 /* 1058 * "Compare the superblocks, effectively checking every other 1059 * field to see if they differ." 1060 */ 1061 return memcmp(sb, asb, sb->fs_sbsize); 1062} 1063 1064static void 1065badsb(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 */ 1081static int 1082calcsb(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 */ 1149static int 1150check_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