setup.c revision 1.43
1 /* $NetBSD: setup.c,v 1.43 2001/07/04 22:43:35 hubertf 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 1.43 2001/07/04 22:43:35 hubertf 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 94 havesb = 0; 95 fswritefd = -1; 96 doskipclean = skipclean; 97 if (stat(dev, &statb) < 0) { 98 printf("Can't stat %s: %s\n", dev, strerror(errno)); 99 return (0); 100 } 101 if (!S_ISCHR(statb.st_mode)) { 102 pfatal("%s is not a character device", dev); 103 if (reply("CONTINUE") == 0) 104 return (0); 105 } 106 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 107 printf("Can't open %s: %s\n", dev, strerror(errno)); 108 return (0); 109 } 110 if (preen == 0) 111 printf("** %s", dev); 112 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 113 fswritefd = -1; 114 if (preen) 115 pfatal("NO WRITE ACCESS"); 116 printf(" (NO WRITE)"); 117 } 118 if (preen == 0) 119 printf("\n"); 120 fsmodified = 0; 121 lfdir = 0; 122 initbarea(&sblk); 123 initbarea(&asblk); 124 sblk.b_un.b_buf = malloc(SBSIZE); 125 sblock = malloc(SBSIZE); 126 asblk.b_un.b_buf = malloc(SBSIZE); 127 altsblock = malloc(SBSIZE); 128 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 129 sblock == NULL || altsblock == NULL) 130 errx(EEXIT, "cannot allocate space for superblock"); 131 if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) 132 dev_bsize = secsize = lp->d_secsize; 133 else 134 dev_bsize = secsize = DEV_BSIZE; 135 /* 136 * Read in the superblock, looking for alternates if necessary 137 */ 138 if (readsb(1) == 0) { 139 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 140 return(0); 141 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 142 return (0); 143 for (cg = 0; cg < proto.fs_ncg; cg++) { 144 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 145 if (readsb(0) != 0) 146 break; 147 } 148 if (cg >= proto.fs_ncg) { 149 printf("%s %s\n%s %s\n%s %s\n", 150 "SEARCH FOR ALTERNATE SUPER-BLOCK", 151 "FAILED. YOU MUST USE THE", 152 "-b OPTION TO fsck_ffs TO SPECIFY THE", 153 "LOCATION OF AN ALTERNATE", 154 "SUPER-BLOCK TO SUPPLY NEEDED", 155 "INFORMATION; SEE fsck_ffs(8)."); 156 return(0); 157 } 158 doskipclean = 0; 159 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 160 } 161 if (debug) 162 printf("clean = %d\n", sblock->fs_clean); 163 if (doswap) 164 doskipclean = 0; 165 if (sblock->fs_clean & FS_ISCLEAN) { 166 if (doskipclean) { 167 pwarn("%sile system is clean; not checking\n", 168 preen ? "f" : "** F"); 169 return (-1); 170 } 171 if (!preen && !doswap) 172 pwarn("** File system is already clean\n"); 173 } 174 maxfsblock = sblock->fs_size; 175 maxino = sblock->fs_ncg * sblock->fs_ipg; 176 sizepb = sblock->fs_bsize; 177 maxfilesize = sblock->fs_bsize * NDADDR - 1; 178 for (i = 0; i < NIADDR; i++) { 179 sizepb *= NINDIR(sblock); 180 maxfilesize += sizepb; 181 } 182 /* 183 * Check and potentially fix certain fields in the super block. 184 */ 185 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 186 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 187 if (reply("SET TO DEFAULT") == 1) { 188 sblock->fs_optim = FS_OPTTIME; 189 sbdirty(); 190 } 191 } 192 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 193 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 194 sblock->fs_minfree); 195 if (reply("SET TO DEFAULT") == 1) { 196 sblock->fs_minfree = 10; 197 sbdirty(); 198 } 199 } 200 if (sblock->fs_interleave < 1 || 201 sblock->fs_interleave > sblock->fs_nsect) { 202 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 203 sblock->fs_interleave); 204 sblock->fs_interleave = 1; 205 if (preen) 206 printf(" (FIXED)\n"); 207 if (preen || reply("SET TO DEFAULT") == 1) { 208 sbdirty(); 209 dirty(&asblk); 210 } 211 } 212 if (sblock->fs_npsect < sblock->fs_nsect || 213 sblock->fs_npsect > sblock->fs_nsect*2) { 214 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 215 sblock->fs_npsect); 216 sblock->fs_npsect = sblock->fs_nsect; 217 if (preen) 218 printf(" (FIXED)\n"); 219 if (preen || reply("SET TO DEFAULT") == 1) { 220 sbdirty(); 221 dirty(&asblk); 222 } 223 } 224 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 225 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 226 sblock->fs_bmask); 227 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 228 if (preen) 229 printf(" (FIXED)\n"); 230 if (preen || reply("FIX") == 1) { 231 sbdirty(); 232 dirty(&asblk); 233 } 234 } 235 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 236 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 237 sblock->fs_fmask); 238 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 239 if (preen) 240 printf(" (FIXED)\n"); 241 if (preen || reply("FIX") == 1) { 242 sbdirty(); 243 dirty(&asblk); 244 } 245 } 246 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 247 if (sblock->fs_maxfilesize != maxfilesize) { 248 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 249 (unsigned long long)sblock->fs_maxfilesize); 250 sblock->fs_maxfilesize = maxfilesize; 251 if (preen) 252 printf(" (FIXED)\n"); 253 if (preen || reply("FIX") == 1) { 254 sbdirty(); 255 dirty(&asblk); 256 } 257 } 258 if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { 259 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 260 sblock->fs_maxsymlinklen); 261 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 262 if (preen) 263 printf(" (FIXED)\n"); 264 if (preen || reply("FIX") == 1) { 265 sbdirty(); 266 dirty(&asblk); 267 } 268 } 269 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 270 pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK", 271 (unsigned long long)sblock->fs_qbmask); 272 sblock->fs_qbmask = ~sblock->fs_bmask; 273 if (preen) 274 printf(" (FIXED)\n"); 275 if (preen || reply("FIX") == 1) { 276 sbdirty(); 277 dirty(&asblk); 278 } 279 } 280 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 281 pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK", 282 (unsigned long long)sblock->fs_qfmask); 283 sblock->fs_qfmask = ~sblock->fs_fmask; 284 if (preen) 285 printf(" (FIXED)\n"); 286 if (preen || reply("FIX") == 1) { 287 sbdirty(); 288 dirty(&asblk); 289 } 290 } 291 newinofmt = 1; 292 } else { 293 sblock->fs_qbmask = ~sblock->fs_bmask; 294 sblock->fs_qfmask = ~sblock->fs_fmask; 295 newinofmt = 0; 296 } 297 /* 298 * Convert to new inode format. 299 */ 300 if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { 301 if (preen) 302 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 303 else if (!reply("CONVERT TO NEW INODE FORMAT")) 304 return(0); 305 doinglevel2++; 306 sblock->fs_inodefmt = FS_44INODEFMT; 307 sblock->fs_maxfilesize = maxfilesize; 308 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 309 sblock->fs_qbmask = ~sblock->fs_bmask; 310 sblock->fs_qfmask = ~sblock->fs_fmask; 311 sbdirty(); 312 dirty(&asblk); 313 } 314 /* 315 * Convert to new cylinder group format. 316 */ 317 if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { 318 if (preen) 319 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 320 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 321 return(0); 322 doinglevel1++; 323 sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; 324 sblock->fs_nrpos = 8; 325 sblock->fs_postbloff = 326 (char *)(&sblock->fs_opostbl[0][0]) - 327 (char *)(&sblock->fs_firstfield); 328 sblock->fs_rotbloff = &sblock->fs_space[0] - 329 (u_char *)(&sblock->fs_firstfield); 330 sblock->fs_cgsize = 331 fragroundup(sblock, CGSIZE(sblock)); 332 sbdirty(); 333 dirty(&asblk); 334 } 335 if (asblk.b_dirty && !bflag) { 336 memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); 337 if (needswap) 338 ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs, 1); 339 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 340 flush(fswritefd, &asblk); 341 } 342 /* 343 * read in the summary info. 344 */ 345 asked = 0; 346 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 347 size = sblock->fs_cssize - i < sblock->fs_bsize ? 348 sblock->fs_cssize - i : sblock->fs_bsize; 349 sblock->fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 350 if (bread(fsreadfd, (char *)sblock->fs_csp[j], 351 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 352 size) != 0 && !asked) { 353 pfatal("BAD SUMMARY INFORMATION"); 354 if (reply("CONTINUE") == 0) { 355 markclean = 0; 356 exit(EEXIT); 357 } 358 asked++; 359 } 360 /* 361 * The following assumes that struct csum is made of 362 * u_int32_t 363 */ 364 if (doswap) { 365 int k; 366 u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; 367 368 for (k = 0; k < size / sizeof(u_int32_t); k++) 369 cd[k] = bswap32(cd[k]); 370 bwrite(fswritefd, (char *)sblock->fs_csp[j], 371 fsbtodb(sblock, 372 sblock->fs_csaddr + j * sblock->fs_frag), 373 size); 374 } 375 if (needswap) { 376 int k; 377 u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; 378 379 for (k = 0; k < size / sizeof(u_int32_t); k++) 380 cd[k] = bswap32(cd[k]); 381 } 382 } 383 /* 384 * allocate and initialize the necessary maps 385 */ 386 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 387 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 388 if (blockmap == NULL) { 389 printf("cannot alloc %u bytes for blockmap\n", 390 (unsigned)bmapsize); 391 goto badsblabel; 392 } 393 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 394 if (statemap == NULL) { 395 printf("cannot alloc %u bytes for statemap\n", 396 (unsigned)(maxino + 1)); 397 goto badsblabel; 398 } 399 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 400 if (typemap == NULL) { 401 printf("cannot alloc %u bytes for typemap\n", 402 (unsigned)(maxino + 1)); 403 goto badsblabel; 404 } 405 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 406 if (lncntp == NULL) { 407 printf("cannot alloc %u bytes for lncntp\n", 408 (unsigned)((maxino + 1) * sizeof(int16_t))); 409 goto badsblabel; 410 } 411 /* 412 * cs_ndir may be inaccurate, particularly if we're using the -b 413 * option, so set a minimum to prevent bogus subdirectory reconnects 414 * and really inefficient directory scans. 415 * Also set a maximum in case the value is too large. 416 */ 417 numdirs = sblock->fs_cstotal.cs_ndir; 418 if (numdirs < 1024) 419 numdirs = 1024; 420 if (numdirs > maxino + 1) 421 numdirs = maxino + 1; 422 inplast = 0; 423 listmax = numdirs + 10; 424 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 425 sizeof(struct inoinfo *)); 426 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 427 sizeof(struct inoinfo *)); 428 if (inpsort == NULL || inphead == NULL) { 429 printf("cannot alloc %u bytes for inphead\n", 430 (unsigned)(numdirs * sizeof(struct inoinfo *))); 431 goto badsblabel; 432 } 433 cgrp = malloc(sblock->fs_cgsize); 434 if (cgrp == NULL) { 435 printf("cannot alloc %u bytes for cylinder group\n", 436 sblock->fs_cgsize); 437 goto badsblabel; 438 } 439 bufinit(); 440 if (sblock->fs_flags & FS_DOSOFTDEP) 441 usedsoftdep = 1; 442 else 443 usedsoftdep = 0; 444 return (1); 445 446 badsblabel: 447 markclean=0; 448 ckfini(); 449 return (0); 450 } 451 452 /* 453 * Read in the super block and its summary info. 454 */ 455 static int 456 readsb(listerr) 457 int listerr; 458 { 459 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 460 struct fs *fs; 461 462 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 463 return (0); 464 sblk.b_bno = super; 465 sblk.b_size = SBSIZE; 466 467 fs = sblk.b_un.b_fs; 468 /* auto detect byte order */ 469 if( fs->fs_magic == FS_MAGIC) { 470 if (endian == 0 || BYTE_ORDER == endian) { 471 needswap = 0; 472 doswap = do_blkswap = do_dirswap = 0; 473 } else { 474 needswap = 1; 475 doswap = do_blkswap = do_dirswap = 1; 476 } 477 } else if (fs->fs_magic == bswap32(FS_MAGIC)) { 478 if (endian == 0 || BYTE_ORDER != endian) { 479 needswap = 1; 480 doswap = do_blkswap = do_dirswap = 0; 481 } else { 482 needswap = 0; 483 doswap = do_blkswap = do_dirswap = 1; 484 } 485 } else { 486 badsb(listerr, "MAGIC NUMBER WRONG"); 487 return (0); 488 } 489 if (doswap) { 490 if (preen) 491 errx(EEXIT, "incompatible options -B and -p"); 492 if (nflag) 493 errx(EEXIT, "incompatible options -B and -n"); 494 if (endian == LITTLE_ENDIAN) { 495 if (!reply("CONVERT TO LITTLE ENDIAN")) 496 return 0; 497 } else if (endian == BIG_ENDIAN) { 498 if (!reply("CONVERT TO BIG ENDIAN")) 499 return 0; 500 } else 501 pfatal("INTERNAL ERROR: unknown endian"); 502 } 503 if (needswap) 504 printf("** Swapped byte order\n"); 505 /* swap SB byte order if asked */ 506 if (doswap) 507 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs, needswap); 508 509 memmove(sblock, sblk.b_un.b_fs, SBSIZE); 510 if (needswap) 511 ffs_sb_swap(sblk.b_un.b_fs, sblock, 0); 512 513 /* 514 * run a few consistency checks of the super block 515 */ 516 if (sblock->fs_ncg < 1) 517 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 518 if (sblock->fs_cpg < 1) 519 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 520 if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || 521 (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) 522 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 523 if (sblock->fs_sbsize > SBSIZE) 524 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 525 /* 526 * Compute block size that the filesystem is based on, 527 * according to fsbtodb, and adjust superblock block number 528 * so we can tell if this is an alternate later. 529 */ 530 super *= dev_bsize; 531 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 532 sblk.b_bno = super / dev_bsize; 533 534 if (bflag) { 535 havesb = 1; 536 return (1); 537 } 538 /* 539 * Set all possible fields that could differ, then do check 540 * of whole super block against an alternate super block. 541 * When an alternate super-block is specified this check is skipped. 542 */ 543 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 544 if (asblk.b_errs) 545 return (0); 546 /* swap SB byte order if asked */ 547 if (doswap) 548 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs, needswap); 549 550 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 551 if (needswap) 552 ffs_sb_swap(asblk.b_un.b_fs, altsblock, 0); 553 if (cmpsblks(sblock, altsblock)) { 554 if (debug) { 555 long *nlp, *olp, *endlp; 556 557 printf("superblock mismatches\n"); 558 nlp = (long *)altsblock; 559 olp = (long *)sblock; 560 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 561 for ( ; olp < endlp; olp++, nlp++) { 562 if (*olp == *nlp) 563 continue; 564 printf("offset %ld, original %lx, alternate %lx\n", 565 (long)(olp - (long *)sblock), *olp, *nlp); 566 } 567 } 568 badsb(listerr, 569 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 570 return (0); 571 } 572 /* Now we know the SB is valid, we can write it back if needed */ 573 if (doswap) { 574 sbdirty(); 575 dirty(&asblk); 576 } 577 havesb = 1; 578 return (1); 579 } 580 581 int 582 cmpsblks(const struct fs *sb, struct fs *asb) 583 { 584 585 asb->fs_firstfield = sb->fs_firstfield; 586 asb->fs_fscktime = sb->fs_fscktime; 587 asb->fs_unused_1 = sb->fs_unused_1; 588 asb->fs_time = sb->fs_time; 589 asb->fs_cstotal = sb->fs_cstotal; 590 asb->fs_cgrotor = sb->fs_cgrotor; 591 asb->fs_fmod = sb->fs_fmod; 592 asb->fs_clean = sb->fs_clean; 593 asb->fs_ronly = sb->fs_ronly; 594 asb->fs_flags = sb->fs_flags; 595 asb->fs_maxcontig = sb->fs_maxcontig; 596 asb->fs_minfree = sb->fs_minfree; 597 asb->fs_optim = sb->fs_optim; 598 asb->fs_rotdelay = sb->fs_rotdelay; 599 asb->fs_maxbpg = sb->fs_maxbpg; 600 memmove(asb->fs_csp, sb->fs_csp, sizeof sb->fs_csp); 601 asb->fs_maxcluster = sb->fs_maxcluster; 602 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 603 memmove(asb->fs_sparecon, 604 sb->fs_sparecon, sizeof sb->fs_sparecon); 605 /* 606 * The following should not have to be copied. 607 */ 608 asb->fs_fsbtodb = sb->fs_fsbtodb; 609 asb->fs_interleave = sb->fs_interleave; 610 asb->fs_npsect = sb->fs_npsect; 611 asb->fs_nrpos = sb->fs_nrpos; 612 asb->fs_state = sb->fs_state; 613 asb->fs_qbmask = sb->fs_qbmask; 614 asb->fs_qfmask = sb->fs_qfmask; 615 asb->fs_state = sb->fs_state; 616 asb->fs_maxfilesize = sb->fs_maxfilesize; 617 618 return (memcmp(sb, asb, (int)sb->fs_sbsize)); 619 } 620 621 static void 622 badsb(listerr, s) 623 int listerr; 624 char *s; 625 { 626 627 if (!listerr) 628 return; 629 if (preen) 630 printf("%s: ", cdevname()); 631 pfatal("BAD SUPER BLOCK: %s\n", s); 632 } 633 634 /* 635 * Calculate a prototype superblock based on information in the disk label. 636 * When done the cgsblock macro can be calculated and the fs_ncg field 637 * can be used. Do NOT attempt to use other macros without verifying that 638 * their needed information is available! 639 */ 640 static int 641 calcsb(dev, devfd, fs) 642 const char *dev; 643 int devfd; 644 struct fs *fs; 645 { 646 struct disklabel *lp; 647 struct partition *pp; 648 char *cp; 649 int i; 650 651 cp = strchr(dev, '\0') - 1; 652 if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'h')) && !isdigit(*cp)) { 653 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 654 return (0); 655 } 656 lp = getdisklabel(dev, devfd); 657 if (isdigit(*cp)) 658 pp = &lp->d_partitions[0]; 659 else 660 pp = &lp->d_partitions[*cp - 'a']; 661 if (pp->p_fstype != FS_BSDFFS) { 662 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 663 dev, pp->p_fstype < FSMAXTYPES ? 664 fstypenames[pp->p_fstype] : "unknown"); 665 return (0); 666 } 667 /* avoid divide by 0 */ 668 if (pp->p_fsize == 0 || pp->p_frag == 0) 669 return (0); 670 memset(fs, 0, sizeof(struct fs)); 671 fs->fs_fsize = pp->p_fsize; 672 fs->fs_frag = pp->p_frag; 673 fs->fs_cpg = pp->p_cpg; 674 fs->fs_size = pp->p_size; 675 fs->fs_ntrak = lp->d_ntracks; 676 fs->fs_nsect = lp->d_nsectors; 677 fs->fs_spc = lp->d_secpercyl; 678 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 679 fs->fs_sblkno = roundup( 680 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 681 fs->fs_frag); 682 fs->fs_cgmask = 0xffffffff; 683 for (i = fs->fs_ntrak; i > 1; i >>= 1) 684 fs->fs_cgmask <<= 1; 685 if (!POWEROF2(fs->fs_ntrak)) 686 fs->fs_cgmask <<= 1; 687 fs->fs_cgoffset = roundup( 688 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 689 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 690 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 691 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 692 fs->fs_fsbtodb++; 693 dev_bsize = lp->d_secsize; 694 return (1); 695 } 696 697 static struct disklabel * 698 getdisklabel(s, fd) 699 const char *s; 700 int fd; 701 { 702 static struct disklabel lab; 703 704 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 705 if (s == NULL) 706 return ((struct disklabel *)NULL); 707 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 708 errx(EEXIT, "%s: can't read disk label", s); 709 } 710 return (&lab); 711 } 712
Indexes created Thu Sep 25 16:09:42 GMT 2025