1 /* $NetBSD: utilities.c,v 1.26 1999/11/15 19:18:26 fvdl 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)utilities.c 8.6 (Berkeley) 5/19/95"; 40 #else 41 __RCSID("$NetBSD: utilities.c,v 1.26 1999/11/15 19:18:26 fvdl Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 48 #include <ufs/ufs/dinode.h> 49 #include <ufs/ufs/dir.h> 50 #include <ufs/ffs/fs.h> 51 #include <ufs/ffs/ffs_extern.h> 52 #include <ufs/ufs/ufs_bswap.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include "fsutil.h" 62 #include "fsck.h" 63 #include "extern.h" 64 65 long diskreads, totalreads; /* Disk cache statistics */ 66 67 static void rwerror __P((char *, ufs_daddr_t)); 68 69 int 70 ftypeok(dp) 71 struct dinode *dp; 72 { 73 switch (iswap16(dp->di_mode) & IFMT) { 74 75 case IFDIR: 76 case IFREG: 77 case IFBLK: 78 case IFCHR: 79 case IFLNK: 80 case IFSOCK: 81 case IFIFO: 82 return (1); 83 84 default: 85 if (debug) 86 printf("bad file type 0%o\n", iswap16(dp->di_mode)); 87 return (0); 88 } 89 } 90 91 int 92 reply(question) 93 char *question; 94 { 95 int persevere; 96 char c; 97 98 if (preen) 99 pfatal("INTERNAL ERROR: GOT TO reply()"); 100 persevere = !strcmp(question, "CONTINUE"); 101 printf("\n"); 102 if (!persevere && (nflag || fswritefd < 0)) { 103 printf("%s? no\n\n", question); 104 resolved = 0; 105 return (0); 106 } 107 if (yflag || (persevere && nflag)) { 108 printf("%s? yes\n\n", question); 109 return (1); 110 } 111 do { 112 printf("%s? [yn] ", question); 113 (void) fflush(stdout); 114 c = getc(stdin); 115 while (c != '\n' && getc(stdin) != '\n') { 116 if (feof(stdin)) { 117 resolved = 0; 118 return (0); 119 } 120 } 121 } while (c != 'y' && c != 'Y' && c != 'n' && c != 'N'); 122 printf("\n"); 123 if (c == 'y' || c == 'Y') 124 return (1); 125 resolved = 0; 126 return (0); 127 } 128 129 /* 130 * Malloc buffers and set up cache. 131 */ 132 void 133 bufinit() 134 { 135 struct bufarea *bp; 136 long bufcnt, i; 137 char *bufp; 138 139 pbp = pdirbp = (struct bufarea *)0; 140 bufp = malloc((unsigned int)sblock->fs_bsize); 141 if (bufp == 0) 142 errx(EEXIT, "cannot allocate buffer pool"); 143 cgblk.b_un.b_buf = bufp; 144 initbarea(&cgblk); 145 bufhead.b_next = bufhead.b_prev = &bufhead; 146 bufcnt = MAXBUFSPACE / sblock->fs_bsize; 147 if (bufcnt < MINBUFS) 148 bufcnt = MINBUFS; 149 for (i = 0; i < bufcnt; i++) { 150 bp = (struct bufarea *)malloc(sizeof(struct bufarea)); 151 bufp = malloc((unsigned int)sblock->fs_bsize); 152 if (bp == NULL || bufp == NULL) { 153 if (i >= MINBUFS) 154 break; 155 errx(EEXIT, "cannot allocate buffer pool"); 156 } 157 bp->b_un.b_buf = bufp; 158 bp->b_prev = &bufhead; 159 bp->b_next = bufhead.b_next; 160 bufhead.b_next->b_prev = bp; 161 bufhead.b_next = bp; 162 initbarea(bp); 163 } 164 bufhead.b_size = i; /* save number of buffers */ 165 } 166 167 /* 168 * Manage a cache of directory blocks. 169 */ 170 struct bufarea * 171 getdatablk(blkno, size) 172 ufs_daddr_t blkno; 173 long size; 174 { 175 struct bufarea *bp; 176 177 for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next) 178 if (bp->b_bno == fsbtodb(sblock, blkno)) 179 goto foundit; 180 for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev) 181 if ((bp->b_flags & B_INUSE) == 0) 182 break; 183 if (bp == &bufhead) 184 errx(EEXIT, "deadlocked buffer pool"); 185 getblk(bp, blkno, size); 186 /* fall through */ 187 foundit: 188 totalreads++; 189 bp->b_prev->b_next = bp->b_next; 190 bp->b_next->b_prev = bp->b_prev; 191 bp->b_prev = &bufhead; 192 bp->b_next = bufhead.b_next; 193 bufhead.b_next->b_prev = bp; 194 bufhead.b_next = bp; 195 bp->b_flags |= B_INUSE; 196 return (bp); 197 } 198 199 void 200 getblk(bp, blk, size) 201 struct bufarea *bp; 202 ufs_daddr_t blk; 203 long size; 204 { 205 ufs_daddr_t dblk; 206 207 dblk = fsbtodb(sblock, blk); 208 if (bp->b_bno != dblk) { 209 flush(fswritefd, bp); 210 diskreads++; 211 bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size); 212 bp->b_bno = dblk; 213 bp->b_size = size; 214 } 215 } 216 217 void 218 flush(fd, bp) 219 int fd; 220 struct bufarea *bp; 221 { 222 int i, j; 223 224 if (!bp->b_dirty) 225 return; 226 if (bp->b_errs != 0) 227 pfatal("WRITING %sZERO'ED BLOCK %d TO DISK\n", 228 (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ", 229 bp->b_bno); 230 bp->b_dirty = 0; 231 bp->b_errs = 0; 232 bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size); 233 if (bp != &sblk) 234 return; 235 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 236 int size = sblock->fs_cssize - i < sblock->fs_bsize ? 237 sblock->fs_cssize - i : sblock->fs_bsize; 238 /* 239 * The following routines assumes that struct csum is made of 240 * u_int32_t's 241 */ 242 if (needswap) { 243 u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; 244 int k; 245 for (k = 0; k < size / sizeof(u_int32_t); k++) 246 cd[k] = bswap32(cd[k]); 247 } 248 bwrite(fswritefd, (char *)sblock->fs_csp[j], 249 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 250 sblock->fs_cssize - i < sblock->fs_bsize ? 251 sblock->fs_cssize - i : sblock->fs_bsize); 252 if (needswap) { 253 u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; 254 int k; 255 for (k = 0; k < size / sizeof(u_int32_t); k++) 256 cd[k] = bswap32(cd[k]); 257 } 258 } 259 } 260 261 static void 262 rwerror(mesg, blk) 263 char *mesg; 264 ufs_daddr_t blk; 265 { 266 267 if (preen == 0) 268 printf("\n"); 269 pfatal("CANNOT %s: BLK %d", mesg, blk); 270 if (reply("CONTINUE") == 0) 271 exit(EEXIT); 272 } 273 274 void 275 ckfini() 276 { 277 struct bufarea *bp, *nbp; 278 int ofsmodified, cnt = 0; 279 280 if (fswritefd < 0) { 281 (void)close(fsreadfd); 282 return; 283 } 284 flush(fswritefd, &sblk); 285 if (havesb && sblk.b_bno != SBOFF / dev_bsize && 286 !preen && reply("UPDATE STANDARD SUPERBLOCK")) { 287 sblk.b_bno = SBOFF / dev_bsize; 288 sbdirty(); 289 flush(fswritefd, &sblk); 290 } 291 flush(fswritefd, &cgblk); 292 free(cgblk.b_un.b_buf); 293 for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) { 294 cnt++; 295 flush(fswritefd, bp); 296 nbp = bp->b_prev; 297 free(bp->b_un.b_buf); 298 free((char *)bp); 299 } 300 if (bufhead.b_size != cnt) 301 errx(EEXIT, "Panic: lost %d buffers", bufhead.b_size - cnt); 302 pbp = pdirbp = (struct bufarea *)0; 303 if (markclean && (sblock->fs_clean & FS_ISCLEAN) == 0) { 304 /* 305 * Mark the file system as clean, and sync the superblock. 306 */ 307 if (preen) 308 pwarn("MARKING FILE SYSTEM CLEAN\n"); 309 else if (!reply("MARK FILE SYSTEM CLEAN")) 310 markclean = 0; 311 if (markclean) { 312 sblock->fs_clean = FS_ISCLEAN; 313 sbdirty(); 314 ofsmodified = fsmodified; 315 flush(fswritefd, &sblk); 316 #if LITE2BORKEN 317 fsmodified = ofsmodified; 318 #endif 319 if (!preen) 320 printf( 321 "\n***** FILE SYSTEM MARKED CLEAN *****\n"); 322 } 323 } 324 if (debug) 325 printf("cache missed %ld of %ld (%d%%)\n", diskreads, 326 totalreads, (int)(diskreads * 100 / totalreads)); 327 (void)close(fsreadfd); 328 (void)close(fswritefd); 329 } 330 331 int 332 bread(fd, buf, blk, size) 333 int fd; 334 char *buf; 335 ufs_daddr_t blk; 336 long size; 337 { 338 char *cp; 339 int i, errs; 340 off_t offset; 341 342 offset = blk; 343 offset *= dev_bsize; 344 if (lseek(fd, offset, 0) < 0) 345 rwerror("SEEK", blk); 346 else if (read(fd, buf, (int)size) == size) 347 return (0); 348 rwerror("READ", blk); 349 if (lseek(fd, offset, 0) < 0) 350 rwerror("SEEK", blk); 351 errs = 0; 352 memset(buf, 0, (size_t)size); 353 printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:"); 354 for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) { 355 if (read(fd, cp, (int)secsize) != secsize) { 356 (void)lseek(fd, offset + i + secsize, 0); 357 if (secsize != dev_bsize && dev_bsize != 1) 358 printf(" %ld (%ld),", 359 (blk * dev_bsize + i) / secsize, 360 blk + i / dev_bsize); 361 else 362 printf(" %ld,", blk + i / dev_bsize); 363 errs++; 364 } 365 } 366 printf("\n"); 367 return (errs); 368 } 369 370 void 371 bwrite(fd, buf, blk, size) 372 int fd; 373 char *buf; 374 ufs_daddr_t blk; 375 long size; 376 { 377 int i; 378 char *cp; 379 off_t offset; 380 381 if (fd < 0) 382 return; 383 offset = blk; 384 offset *= dev_bsize; 385 if (lseek(fd, offset, 0) < 0) 386 rwerror("SEEK", blk); 387 else if (write(fd, buf, (int)size) == size) { 388 fsmodified = 1; 389 return; 390 } 391 rwerror("WRITE", blk); 392 if (lseek(fd, offset, 0) < 0) 393 rwerror("SEEK", blk); 394 printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:"); 395 for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize) 396 if (write(fd, cp, (int)dev_bsize) != dev_bsize) { 397 (void)lseek(fd, offset + i + dev_bsize, 0); 398 printf(" %ld,", blk + i / dev_bsize); 399 } 400 printf("\n"); 401 return; 402 } 403 404 /* 405 * allocate a data block with the specified number of fragments 406 */ 407 ufs_daddr_t 408 allocblk(frags) 409 long frags; 410 { 411 int i, j, k, cg, baseblk; 412 struct cg *cgp = cgrp; 413 414 if (frags <= 0 || frags > sblock->fs_frag) 415 return (0); 416 for (i = 0; i < maxfsblock - sblock->fs_frag; i += sblock->fs_frag) { 417 for (j = 0; j <= sblock->fs_frag - frags; j++) { 418 if (testbmap(i + j)) 419 continue; 420 for (k = 1; k < frags; k++) 421 if (testbmap(i + j + k)) 422 break; 423 if (k < frags) { 424 j += k; 425 continue; 426 } 427 cg = dtog(sblock, i + j); 428 getblk(&cgblk, cgtod(sblock, cg), sblock->fs_cgsize); 429 memcpy(cgp, cgblk.b_un.b_cg, sblock->fs_cgsize); 430 if ((doswap && !needswap) || (!doswap && needswap)) 431 swap_cg(cgblk.b_un.b_cg, cgp); 432 if (!cg_chkmagic(cgp, 0)) 433 pfatal("CG %d: ALLOCBLK: BAD MAGIC NUMBER\n", 434 cg); 435 baseblk = dtogd(sblock, i + j); 436 for (k = 0; k < frags; k++) { 437 setbmap(i + j + k); 438 clrbit(cg_blksfree(cgp, 0), baseblk + k); 439 } 440 n_blks += frags; 441 if (frags == sblock->fs_frag) 442 cgp->cg_cs.cs_nbfree--; 443 else 444 cgp->cg_cs.cs_nffree -= frags; 445 cgdirty(); 446 return (i + j); 447 } 448 } 449 return (0); 450 } 451 452 /* 453 * Free a previously allocated block 454 */ 455 void 456 freeblk(blkno, frags) 457 ufs_daddr_t blkno; 458 long frags; 459 { 460 struct inodesc idesc; 461 462 idesc.id_blkno = blkno; 463 idesc.id_numfrags = frags; 464 (void)pass4check(&idesc); 465 } 466 467 /* 468 * Find a pathname 469 */ 470 void 471 getpathname(namebuf, curdir, ino) 472 char *namebuf; 473 ino_t curdir, ino; 474 { 475 int len; 476 char *cp; 477 struct inodesc idesc; 478 static int busy = 0; 479 480 if (curdir == ino && ino == ROOTINO) { 481 (void)strcpy(namebuf, "/"); 482 return; 483 } 484 if (busy || 485 (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) { 486 (void)strcpy(namebuf, "?"); 487 return; 488 } 489 busy = 1; 490 memset(&idesc, 0, sizeof(struct inodesc)); 491 idesc.id_type = DATA; 492 idesc.id_fix = IGNORE; 493 cp = &namebuf[MAXPATHLEN - 1]; 494 *cp = '\0'; 495 if (curdir != ino) { 496 idesc.id_parent = curdir; 497 goto namelookup; 498 } 499 while (ino != ROOTINO) { 500 idesc.id_number = ino; 501 idesc.id_func = findino; 502 idesc.id_name = ".."; 503 if ((ckinode(ginode(ino), &idesc) & FOUND) == 0) 504 break; 505 namelookup: 506 idesc.id_number = idesc.id_parent; 507 idesc.id_parent = ino; 508 idesc.id_func = findname; 509 idesc.id_name = namebuf; 510 if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0) 511 break; 512 len = strlen(namebuf); 513 cp -= len; 514 memmove(cp, namebuf, (size_t)len); 515 *--cp = '/'; 516 if (cp < &namebuf[MAXNAMLEN]) 517 break; 518 ino = idesc.id_number; 519 } 520 busy = 0; 521 if (ino != ROOTINO) 522 *--cp = '?'; 523 memmove(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp)); 524 } 525 526 void 527 catch(sig) 528 int sig; 529 { 530 if (!doinglevel2) { 531 markclean = 0; 532 ckfini(); 533 } 534 exit(12); 535 } 536 537 /* 538 * When preening, allow a single quit to signal 539 * a special exit after filesystem checks complete 540 * so that reboot sequence may be interrupted. 541 */ 542 void 543 catchquit(sig) 544 int sig; 545 { 546 extern int returntosingle; 547 548 printf("returning to single-user after filesystem check\n"); 549 returntosingle = 1; 550 (void)signal(SIGQUIT, SIG_DFL); 551 } 552 553 /* 554 * Ignore a single quit signal; wait and flush just in case. 555 * Used by child processes in preen. 556 */ 557 void 558 voidquit(sig) 559 int sig; 560 { 561 562 sleep(1); 563 (void)signal(SIGQUIT, SIG_IGN); 564 (void)signal(SIGQUIT, SIG_DFL); 565 } 566 567 /* 568 * determine whether an inode should be fixed. 569 */ 570 int 571 dofix(idesc, msg) 572 struct inodesc *idesc; 573 char *msg; 574 { 575 576 switch (idesc->id_fix) { 577 578 case DONTKNOW: 579 if (idesc->id_type == DATA) 580 direrror(idesc->id_number, msg); 581 else 582 pwarn(msg); 583 if (preen) { 584 printf(" (SALVAGED)\n"); 585 idesc->id_fix = FIX; 586 return (ALTERED); 587 } 588 if (reply("SALVAGE") == 0) { 589 idesc->id_fix = NOFIX; 590 return (0); 591 } 592 idesc->id_fix = FIX; 593 return (ALTERED); 594 595 case FIX: 596 return (ALTERED); 597 598 case NOFIX: 599 case IGNORE: 600 return (0); 601 602 default: 603 errx(EEXIT, "UNKNOWN INODESC FIX MODE %d", idesc->id_fix); 604 } 605 /* NOTREACHED */ 606 return (0); 607 } 608 609 void 610 copyback_cg(blk) 611 struct bufarea *blk; 612 { 613 614 memcpy(blk->b_un.b_cg, cgrp, sblock->fs_cgsize); 615 if (needswap) 616 swap_cg(cgrp, blk->b_un.b_cg); 617 } 618 619 void 620 swap_cg(o, n) 621 struct cg *o, *n; 622 { 623 int i; 624 u_int32_t *n32, *o32; 625 u_int16_t *n16, *o16; 626 627 n->cg_firstfield = bswap32(o->cg_firstfield); 628 n->cg_magic = bswap32(o->cg_magic); 629 n->cg_time = bswap32(o->cg_time); 630 n->cg_cgx = bswap32(o->cg_cgx); 631 n->cg_ncyl = bswap16(o->cg_ncyl); 632 n->cg_niblk = bswap16(o->cg_niblk); 633 n->cg_ndblk = bswap32(o->cg_ndblk); 634 n->cg_cs.cs_ndir = bswap32(o->cg_cs.cs_ndir); 635 n->cg_cs.cs_nbfree = bswap32(o->cg_cs.cs_nbfree); 636 n->cg_cs.cs_nifree = bswap32(o->cg_cs.cs_nifree); 637 n->cg_cs.cs_nffree = bswap32(o->cg_cs.cs_nffree); 638 n->cg_rotor = bswap32(o->cg_rotor); 639 n->cg_frotor = bswap32(o->cg_frotor); 640 n->cg_irotor = bswap32(o->cg_irotor); 641 n->cg_btotoff = bswap32(o->cg_btotoff); 642 n->cg_boff = bswap32(o->cg_boff); 643 n->cg_iusedoff = bswap32(o->cg_iusedoff); 644 n->cg_freeoff = bswap32(o->cg_freeoff); 645 n->cg_nextfreeoff = bswap32(o->cg_nextfreeoff); 646 n->cg_clustersumoff = bswap32(o->cg_clustersumoff); 647 n->cg_clusteroff = bswap32(o->cg_clusteroff); 648 n->cg_nclusterblks = bswap32(o->cg_nclusterblks); 649 for (i=0; i < MAXFRAG; i++) 650 n->cg_frsum[i] = bswap32(o->cg_frsum[i]); 651 652 if (sblock->fs_postblformat == FS_42POSTBLFMT) { /* old format */ 653 struct ocg *on, *oo; 654 int j; 655 on = (struct ocg *)n; 656 oo = (struct ocg *)o; 657 for(i = 0; i < 8; i++) { 658 on->cg_frsum[i] = bswap32(oo->cg_frsum[i]); 659 } 660 for(i = 0; i < 32; i++) { 661 on->cg_btot[i] = bswap32(oo->cg_btot[i]); 662 for (j = 0; j < 8; j++) 663 on->cg_b[i][j] = bswap16(oo->cg_b[i][j]); 664 } 665 memmove(on->cg_iused, oo->cg_iused, 256); 666 on->cg_magic = bswap32(oo->cg_magic); 667 } else { /* new format */ 668 if (n->cg_magic == CG_MAGIC) { 669 n32 = (u_int32_t*)((u_int8_t*)n + n->cg_btotoff); 670 o32 = (u_int32_t*)((u_int8_t*)o + n->cg_btotoff); 671 n16 = (u_int16_t*)((u_int8_t*)n + n->cg_boff); 672 o16 = (u_int16_t*)((u_int8_t*)o + n->cg_boff); 673 } else { 674 n32 = (u_int32_t*)((u_int8_t*)n + o->cg_btotoff); 675 o32 = (u_int32_t*)((u_int8_t*)o + o->cg_btotoff); 676 n16 = (u_int16_t*)((u_int8_t*)n + o->cg_boff); 677 o16 = (u_int16_t*)((u_int8_t*)o + o->cg_boff); 678 } 679 for (i=0; i < sblock->fs_cpg; i++) 680 n32[i] = bswap32(o32[i]); 681 682 for (i=0; i < sblock->fs_cpg * sblock->fs_nrpos; i++) 683 n16[i] = bswap16(o16[i]); 684 685 if (n->cg_magic == CG_MAGIC) { 686 n32 = (u_int32_t*)((u_int8_t*)n + n->cg_clustersumoff); 687 o32 = (u_int32_t*)((u_int8_t*)o + n->cg_clustersumoff); 688 } else { 689 n32 = (u_int32_t*)((u_int8_t*)n + o->cg_clustersumoff); 690 o32 = (u_int32_t*)((u_int8_t*)o + o->cg_clustersumoff); 691 } 692 for (i = 0; i < sblock->fs_contigsumsize + 1; i++) 693 n32[i] = bswap32(o32[i]); 694 } 695 } 696