setup.c revision 1.37.4.5
1 /* $NetBSD: setup.c,v 1.37.4.5 2001/11/25 19:54:36 he 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[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 40 #else 41 __RCSID("$NetBSD: setup.c,v 1.37.4.5 2001/11/25 19:54:36 he Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #include <sys/stat.h> 48 #include <sys/ioctl.h> 49 #define FSTYPENAMES 50 #include <sys/disklabel.h> 51 #include <sys/file.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ufs/ufs_bswap.h> 55 #include <ufs/ffs/fs.h> 56 #include <ufs/ffs/ffs_extern.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 65 #include "fsck.h" 66 #include "extern.h" 67 #include "fsutil.h" 68 69 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 70 71 static void badsb __P((int, char *)); 72 static int calcsb __P((const char *, int, struct fs *)); 73 static struct disklabel *getdisklabel __P((const char *, int)); 74 static int readsb __P((int)); 75 76 /* 77 * Read in a superblock finding an alternate if necessary. 78 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 79 * is already clean (preen mode only). 80 */ 81 int 82 setup(dev) 83 const char *dev; 84 { 85 long cg, size, asked, i, j; 86 long bmapsize; 87 struct disklabel *lp; 88 off_t sizepb; 89 struct stat statb; 90 struct fs proto; 91 int doskipclean; 92 u_int64_t maxfilesize; 93 struct csum *ccsp; 94 95 havesb = 0; 96 fswritefd = -1; 97 doskipclean = skipclean; 98 if (stat(dev, &statb) < 0) { 99 printf("Can't stat %s: %s\n", dev, strerror(errno)); 100 return (0); 101 } 102 if (!S_ISCHR(statb.st_mode)) { 103 pfatal("%s is not a character device", dev); 104 if (reply("CONTINUE") == 0) 105 return (0); 106 } 107 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 108 printf("Can't open %s: %s\n", dev, strerror(errno)); 109 return (0); 110 } 111 if (preen == 0) 112 printf("** %s", dev); 113 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 114 fswritefd = -1; 115 if (preen) 116 pfatal("NO WRITE ACCESS"); 117 printf(" (NO WRITE)"); 118 } 119 if (preen == 0) 120 printf("\n"); 121 fsmodified = 0; 122 lfdir = 0; 123 initbarea(&sblk); 124 initbarea(&asblk); 125 sblk.b_un.b_buf = malloc(SBSIZE); 126 sblock = malloc(SBSIZE); 127 asblk.b_un.b_buf = malloc(SBSIZE); 128 altsblock = malloc(SBSIZE); 129 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 130 sblock == NULL || altsblock == NULL) 131 errx(EEXIT, "cannot allocate space for superblock"); 132 if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) 133 dev_bsize = secsize = lp->d_secsize; 134 else 135 dev_bsize = secsize = DEV_BSIZE; 136 /* 137 * Read in the superblock, looking for alternates if necessary 138 */ 139 if (readsb(1) == 0) { 140 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 141 return(0); 142 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 143 return (0); 144 for (cg = 0; cg < proto.fs_ncg; cg++) { 145 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 146 if (readsb(0) != 0) 147 break; 148 } 149 if (cg >= proto.fs_ncg) { 150 printf("%s %s\n%s %s\n%s %s\n", 151 "SEARCH FOR ALTERNATE SUPER-BLOCK", 152 "FAILED. YOU MUST USE THE", 153 "-b OPTION TO fsck_ffs TO SPECIFY THE", 154 "LOCATION OF AN ALTERNATE", 155 "SUPER-BLOCK TO SUPPLY NEEDED", 156 "INFORMATION; SEE fsck_ffs(8)."); 157 return(0); 158 } 159 doskipclean = 0; 160 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 161 } 162 if (debug) 163 printf("clean = %d\n", sblock->fs_clean); 164 if (doswap) 165 doskipclean = 0; 166 if (sblock->fs_clean & FS_ISCLEAN) { 167 if (doskipclean) { 168 pwarn("%sile system is clean; not checking\n", 169 preen ? "f" : "** F"); 170 return (-1); 171 } 172 if (!preen && !doswap) 173 pwarn("** File system is already clean\n"); 174 } 175 maxfsblock = sblock->fs_size; 176 maxino = sblock->fs_ncg * sblock->fs_ipg; 177 sizepb = sblock->fs_bsize; 178 maxfilesize = sblock->fs_bsize * NDADDR - 1; 179 for (i = 0; i < NIADDR; i++) { 180 sizepb *= NINDIR(sblock); 181 maxfilesize += sizepb; 182 } 183 /* 184 * Check and potentially fix certain fields in the super block. 185 */ 186 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 187 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 188 if (reply("SET TO DEFAULT") == 1) { 189 sblock->fs_optim = FS_OPTTIME; 190 sbdirty(); 191 } 192 } 193 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 194 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 195 sblock->fs_minfree); 196 if (reply("SET TO DEFAULT") == 1) { 197 sblock->fs_minfree = 10; 198 sbdirty(); 199 } 200 } 201 if (sblock->fs_interleave < 1 || 202 sblock->fs_interleave > sblock->fs_nsect) { 203 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 204 sblock->fs_interleave); 205 sblock->fs_interleave = 1; 206 if (preen) 207 printf(" (FIXED)\n"); 208 if (preen || reply("SET TO DEFAULT") == 1) { 209 sbdirty(); 210 dirty(&asblk); 211 } 212 } 213 if (sblock->fs_npsect < sblock->fs_nsect || 214 sblock->fs_npsect > sblock->fs_nsect*2) { 215 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 216 sblock->fs_npsect); 217 sblock->fs_npsect = sblock->fs_nsect; 218 if (preen) 219 printf(" (FIXED)\n"); 220 if (preen || reply("SET TO DEFAULT") == 1) { 221 sbdirty(); 222 dirty(&asblk); 223 } 224 } 225 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 226 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 227 sblock->fs_bmask); 228 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 229 if (preen) 230 printf(" (FIXED)\n"); 231 if (preen || reply("FIX") == 1) { 232 sbdirty(); 233 dirty(&asblk); 234 } 235 } 236 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 237 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 238 sblock->fs_fmask); 239 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 240 if (preen) 241 printf(" (FIXED)\n"); 242 if (preen || reply("FIX") == 1) { 243 sbdirty(); 244 dirty(&asblk); 245 } 246 } 247 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 248 if (sblock->fs_maxfilesize != maxfilesize) { 249 pwarn("INCORRECT MAXFILESIZE=%qd IN SUPERBLOCK", 250 (unsigned long long)sblock->fs_maxfilesize); 251 sblock->fs_maxfilesize = maxfilesize; 252 if (preen) 253 printf(" (FIXED)\n"); 254 if (preen || reply("FIX") == 1) { 255 sbdirty(); 256 dirty(&asblk); 257 } 258 } 259 if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { 260 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 261 sblock->fs_maxsymlinklen); 262 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 263 if (preen) 264 printf(" (FIXED)\n"); 265 if (preen || reply("FIX") == 1) { 266 sbdirty(); 267 dirty(&asblk); 268 } 269 } 270 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 271 pwarn("INCORRECT QBMASK=%qx IN SUPERBLOCK", 272 (unsigned long long)sblock->fs_qbmask); 273 sblock->fs_qbmask = ~sblock->fs_bmask; 274 if (preen) 275 printf(" (FIXED)\n"); 276 if (preen || reply("FIX") == 1) { 277 sbdirty(); 278 dirty(&asblk); 279 } 280 } 281 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 282 pwarn("INCORRECT QFMASK=%qx IN SUPERBLOCK", 283 (unsigned long long)sblock->fs_qfmask); 284 sblock->fs_qfmask = ~sblock->fs_fmask; 285 if (preen) 286 printf(" (FIXED)\n"); 287 if (preen || reply("FIX") == 1) { 288 sbdirty(); 289 dirty(&asblk); 290 } 291 } 292 newinofmt = 1; 293 } else { 294 sblock->fs_qbmask = ~sblock->fs_bmask; 295 sblock->fs_qfmask = ~sblock->fs_fmask; 296 newinofmt = 0; 297 } 298 /* 299 * Convert to new inode format. 300 */ 301 if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { 302 if (preen) 303 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 304 else if (!reply("CONVERT TO NEW INODE FORMAT")) 305 return(0); 306 doinglevel2++; 307 sblock->fs_inodefmt = FS_44INODEFMT; 308 sblock->fs_maxfilesize = maxfilesize; 309 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 310 sblock->fs_qbmask = ~sblock->fs_bmask; 311 sblock->fs_qfmask = ~sblock->fs_fmask; 312 sbdirty(); 313 dirty(&asblk); 314 } 315 /* 316 * Convert to new cylinder group format. 317 */ 318 if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { 319 if (preen) 320 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 321 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 322 return(0); 323 doinglevel1++; 324 sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; 325 sblock->fs_nrpos = 8; 326 sblock->fs_postbloff = 327 (char *)(&sblock->fs_opostbl[0][0]) - 328 (char *)(&sblock->fs_firstfield); 329 sblock->fs_rotbloff = &sblock->fs_space[0] - 330 (u_char *)(&sblock->fs_firstfield); 331 sblock->fs_cgsize = 332 fragroundup(sblock, CGSIZE(sblock)); 333 sbdirty(); 334 dirty(&asblk); 335 } 336 if (asblk.b_dirty && !bflag) { 337 memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); 338 if (needswap) 339 ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs); 340 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 341 flush(fswritefd, &asblk); 342 } 343 /* 344 * read in the summary info. 345 */ 346 asked = 0; 347 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 348 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 349 size = sblock->fs_cssize - i < sblock->fs_bsize ? 350 sblock->fs_cssize - i : sblock->fs_bsize; 351 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 352 if (bread(fsreadfd, (char *)ccsp, 353 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 354 size) != 0 && !asked) { 355 pfatal("BAD SUMMARY INFORMATION"); 356 if (reply("CONTINUE") == 0) { 357 markclean = 0; 358 exit(EEXIT); 359 } 360 asked++; 361 } 362 if (doswap) { 363 ffs_csum_swap(ccsp, ccsp, size); 364 bwrite(fswritefd, (char *)ccsp, 365 fsbtodb(sblock, 366 sblock->fs_csaddr + j * sblock->fs_frag), 367 size); 368 } 369 if (needswap) 370 ffs_csum_swap(ccsp, ccsp, size); 371 } 372 /* 373 * allocate and initialize the necessary maps 374 */ 375 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 376 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 377 if (blockmap == NULL) { 378 printf("cannot alloc %u bytes for blockmap\n", 379 (unsigned)bmapsize); 380 goto badsblabel; 381 } 382 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 383 if (statemap == NULL) { 384 printf("cannot alloc %u bytes for statemap\n", 385 (unsigned)(maxino + 1)); 386 goto badsblabel; 387 } 388 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 389 if (typemap == NULL) { 390 printf("cannot alloc %u bytes for typemap\n", 391 (unsigned)(maxino + 1)); 392 goto badsblabel; 393 } 394 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 395 if (lncntp == NULL) { 396 printf("cannot alloc %u bytes for lncntp\n", 397 (unsigned)((maxino + 1) * sizeof(int16_t))); 398 goto badsblabel; 399 } 400 /* 401 * cs_ndir may be inaccurate, particularly if we're using the -b 402 * option, so set a minimum to prevent bogus subdirectory reconnects 403 * and really inefficient directory scans. 404 * Also set a maximum in case the value is too large. 405 */ 406 numdirs = sblock->fs_cstotal.cs_ndir; 407 if (numdirs < 1024) 408 numdirs = 1024; 409 if (numdirs > maxino + 1) 410 numdirs = maxino + 1; 411 inplast = 0; 412 listmax = numdirs + 10; 413 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 414 sizeof(struct inoinfo *)); 415 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 416 sizeof(struct inoinfo *)); 417 if (inpsort == NULL || inphead == NULL) { 418 printf("cannot alloc %u bytes for inphead\n", 419 (unsigned)(numdirs * sizeof(struct inoinfo *))); 420 goto badsblabel; 421 } 422 cgrp = malloc(sblock->fs_cgsize); 423 if (cgrp == NULL) { 424 printf("cannot alloc %u bytes for cylinder group\n", 425 sblock->fs_cgsize); 426 goto badsblabel; 427 } 428 bufinit(); 429 if (sblock->fs_flags & FS_DOSOFTDEP) 430 usedsoftdep = 1; 431 else 432 usedsoftdep = 0; 433 return (1); 434 435 badsblabel: 436 markclean=0; 437 ckfini(); 438 return (0); 439 } 440 441 /* 442 * Read in the super block and its summary info. 443 */ 444 static int 445 readsb(listerr) 446 int listerr; 447 { 448 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 449 struct fs *fs; 450 451 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 452 return (0); 453 sblk.b_bno = super; 454 sblk.b_size = SBSIZE; 455 456 fs = sblk.b_un.b_fs; 457 /* auto detect byte order */ 458 if( fs->fs_magic == FS_MAGIC) { 459 if (endian == 0 || BYTE_ORDER == endian) { 460 needswap = 0; 461 doswap = do_blkswap = do_dirswap = 0; 462 } else { 463 needswap = 1; 464 doswap = do_blkswap = do_dirswap = 1; 465 } 466 } else if (fs->fs_magic == bswap32(FS_MAGIC)) { 467 if (endian == 0 || BYTE_ORDER != endian) { 468 needswap = 1; 469 doswap = do_blkswap = do_dirswap = 0; 470 } else { 471 needswap = 0; 472 doswap = do_blkswap = do_dirswap = 1; 473 } 474 } else { 475 badsb(listerr, "MAGIC NUMBER WRONG"); 476 return (0); 477 } 478 if (doswap) { 479 if (preen) 480 errx(EEXIT, "incompatible options -B and -p"); 481 if (nflag) 482 errx(EEXIT, "incompatible options -B and -n"); 483 if (endian == LITTLE_ENDIAN) { 484 if (!reply("CONVERT TO LITTLE ENDIAN")) 485 return 0; 486 } else if (endian == BIG_ENDIAN) { 487 if (!reply("CONVERT TO BIG ENDIAN")) 488 return 0; 489 } else 490 pfatal("INTERNAL ERROR: unknown endian"); 491 } 492 if (needswap) 493 printf("** Swapped byte order\n"); 494 /* swap SB byte order if asked */ 495 if (doswap) 496 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 497 498 memmove(sblock, sblk.b_un.b_fs, SBSIZE); 499 if (needswap) 500 ffs_sb_swap(sblk.b_un.b_fs, sblock); 501 502 /* 503 * run a few consistency checks of the super block 504 */ 505 if (sblock->fs_ncg < 1) 506 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 507 if (sblock->fs_cpg < 1) 508 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 509 if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || 510 (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) 511 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 512 if (sblock->fs_sbsize > SBSIZE) 513 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 514 /* 515 * Compute block size that the filesystem is based on, 516 * according to fsbtodb, and adjust superblock block number 517 * so we can tell if this is an alternate later. 518 */ 519 super *= dev_bsize; 520 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 521 sblk.b_bno = super / dev_bsize; 522 523 if (bflag) { 524 havesb = 1; 525 return (1); 526 } 527 /* 528 * Set all possible fields that could differ, then do check 529 * of whole super block against an alternate super block. 530 * When an alternate super-block is specified this check is skipped. 531 */ 532 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 533 if (asblk.b_errs) 534 return (0); 535 /* swap SB byte order if asked */ 536 if (doswap) 537 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 538 539 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 540 if (needswap) 541 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 542 if (cmpsblks(sblock, altsblock)) { 543 if (debug) { 544 long *nlp, *olp, *endlp; 545 546 printf("superblock mismatches\n"); 547 nlp = (long *)altsblock; 548 olp = (long *)sblock; 549 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 550 for ( ; olp < endlp; olp++, nlp++) { 551 if (*olp == *nlp) 552 continue; 553 printf("offset %ld, original %lx, alternate %lx\n", 554 (long)(olp - (long *)sblock), *olp, *nlp); 555 } 556 } 557 badsb(listerr, 558 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 559 return (0); 560 } 561 /* Now we know the SB is valid, we can write it back if needed */ 562 if (doswap) { 563 sbdirty(); 564 dirty(&asblk); 565 } 566 havesb = 1; 567 return (1); 568 } 569 570 int 571 cmpsblks(const struct fs *sb, struct fs *asb) 572 { 573 574 asb->fs_firstfield = sb->fs_firstfield; 575 asb->fs_unused_1 = sb->fs_unused_1; 576 asb->fs_time = sb->fs_time; 577 asb->fs_cstotal = sb->fs_cstotal; 578 asb->fs_cgrotor = sb->fs_cgrotor; 579 asb->fs_fmod = sb->fs_fmod; 580 asb->fs_clean = sb->fs_clean; 581 asb->fs_ronly = sb->fs_ronly; 582 asb->fs_flags = sb->fs_flags; 583 asb->fs_maxcontig = sb->fs_maxcontig; 584 asb->fs_minfree = sb->fs_minfree; 585 asb->fs_optim = sb->fs_optim; 586 asb->fs_rotdelay = sb->fs_rotdelay; 587 asb->fs_maxbpg = sb->fs_maxbpg; 588 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 589 asb->fs_contigdirs = sb->fs_contigdirs; 590 asb->fs_csp = sb->fs_csp; 591 asb->fs_maxcluster = sb->fs_maxcluster; 592 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 593 memmove(asb->fs_snapinum, 594 sb->fs_snapinum, sizeof sb->fs_snapinum); 595 asb->fs_avgfilesize = sb->fs_avgfilesize; 596 asb->fs_avgfpdir = sb->fs_avgfpdir; 597 memmove(asb->fs_sparecon, 598 sb->fs_sparecon, sizeof sb->fs_sparecon); 599 /* 600 * The following should not have to be copied. 601 */ 602 asb->fs_fsbtodb = sb->fs_fsbtodb; 603 asb->fs_interleave = sb->fs_interleave; 604 asb->fs_npsect = sb->fs_npsect; 605 asb->fs_nrpos = sb->fs_nrpos; 606 asb->fs_state = sb->fs_state; 607 asb->fs_qbmask = sb->fs_qbmask; 608 asb->fs_qfmask = sb->fs_qfmask; 609 asb->fs_state = sb->fs_state; 610 asb->fs_maxfilesize = sb->fs_maxfilesize; 611 612 return (memcmp(sb, asb, (int)sb->fs_sbsize)); 613 } 614 615 static void 616 badsb(listerr, s) 617 int listerr; 618 char *s; 619 { 620 621 if (!listerr) 622 return; 623 if (preen) 624 printf("%s: ", cdevname()); 625 pfatal("BAD SUPER BLOCK: %s\n", s); 626 } 627 628 /* 629 * Calculate a prototype superblock based on information in the disk label. 630 * When done the cgsblock macro can be calculated and the fs_ncg field 631 * can be used. Do NOT attempt to use other macros without verifying that 632 * their needed information is available! 633 */ 634 static int 635 calcsb(dev, devfd, fs) 636 const char *dev; 637 int devfd; 638 struct fs *fs; 639 { 640 struct disklabel *lp; 641 struct partition *pp; 642 char *cp; 643 int i; 644 645 cp = strchr(dev, '\0') - 1; 646 if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'h')) && !isdigit(*cp)) { 647 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 648 return (0); 649 } 650 lp = getdisklabel(dev, devfd); 651 if (isdigit(*cp)) 652 pp = &lp->d_partitions[0]; 653 else 654 pp = &lp->d_partitions[*cp - 'a']; 655 if (pp->p_fstype != FS_BSDFFS) { 656 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 657 dev, pp->p_fstype < FSMAXTYPES ? 658 fstypenames[pp->p_fstype] : "unknown"); 659 return (0); 660 } 661 /* avoid divide by 0 */ 662 if (pp->p_fsize == 0 || pp->p_frag == 0) 663 return (0); 664 memset(fs, 0, sizeof(struct fs)); 665 fs->fs_fsize = pp->p_fsize; 666 fs->fs_frag = pp->p_frag; 667 fs->fs_cpg = pp->p_cpg; 668 fs->fs_size = pp->p_size; 669 fs->fs_ntrak = lp->d_ntracks; 670 fs->fs_nsect = lp->d_nsectors; 671 fs->fs_spc = lp->d_secpercyl; 672 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 673 fs->fs_sblkno = roundup( 674 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 675 fs->fs_frag); 676 fs->fs_cgmask = 0xffffffff; 677 for (i = fs->fs_ntrak; i > 1; i >>= 1) 678 fs->fs_cgmask <<= 1; 679 if (!POWEROF2(fs->fs_ntrak)) 680 fs->fs_cgmask <<= 1; 681 fs->fs_cgoffset = roundup( 682 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 683 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 684 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 685 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 686 fs->fs_fsbtodb++; 687 dev_bsize = lp->d_secsize; 688 return (1); 689 } 690 691 static struct disklabel * 692 getdisklabel(s, fd) 693 const char *s; 694 int fd; 695 { 696 static struct disklabel lab; 697 698 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 699 if (s == NULL) 700 return ((struct disklabel *)NULL); 701 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 702 errx(EEXIT, "%s: can't read disk label", s); 703 } 704 return (&lab); 705 } 706
Indexes created Wed Oct 22 13:09:56 GMT 2025