setup.c revision 1.45
1 /* $NetBSD: setup.c,v 1.45 2001/08/17 02:18:47 lukem 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 1.45 2001/08/17 02:18:47 lukem 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 (forceimage) { 102 if (!S_ISREG(statb.st_mode)) { 103 pfatal("%s is not a regular file", dev); 104 if (reply("CONTINUE") == 0) 105 return (0); 106 } 107 } else if (!S_ISCHR(statb.st_mode)) { 108 pfatal("%s is not a character device", dev); 109 if (reply("CONTINUE") == 0) 110 return (0); 111 } 112 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 113 printf("Can't open %s: %s\n", dev, strerror(errno)); 114 return (0); 115 } 116 if (preen == 0) 117 printf("** %s", dev); 118 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 119 fswritefd = -1; 120 if (preen) 121 pfatal("NO WRITE ACCESS"); 122 printf(" (NO WRITE)"); 123 } 124 if (preen == 0) 125 printf("\n"); 126 fsmodified = 0; 127 lfdir = 0; 128 initbarea(&sblk); 129 initbarea(&asblk); 130 sblk.b_un.b_buf = malloc(SBSIZE); 131 sblock = malloc(SBSIZE); 132 asblk.b_un.b_buf = malloc(SBSIZE); 133 altsblock = malloc(SBSIZE); 134 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 135 sblock == NULL || altsblock == NULL) 136 errx(EEXIT, "cannot allocate space for superblock"); 137 if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) 138 dev_bsize = secsize = lp->d_secsize; 139 else 140 dev_bsize = secsize = DEV_BSIZE; 141 /* 142 * Read in the superblock, looking for alternates if necessary 143 */ 144 if (readsb(1) == 0) { 145 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 146 return(0); 147 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 148 return (0); 149 for (cg = 0; cg < proto.fs_ncg; cg++) { 150 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 151 if (readsb(0) != 0) 152 break; 153 } 154 if (cg >= proto.fs_ncg) { 155 printf("%s %s\n%s %s\n%s %s\n", 156 "SEARCH FOR ALTERNATE SUPER-BLOCK", 157 "FAILED. YOU MUST USE THE", 158 "-b OPTION TO fsck_ffs TO SPECIFY THE", 159 "LOCATION OF AN ALTERNATE", 160 "SUPER-BLOCK TO SUPPLY NEEDED", 161 "INFORMATION; SEE fsck_ffs(8)."); 162 return(0); 163 } 164 doskipclean = 0; 165 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 166 } 167 if (debug) 168 printf("clean = %d\n", sblock->fs_clean); 169 if (doswap) 170 doskipclean = 0; 171 if (sblock->fs_clean & FS_ISCLEAN) { 172 if (doskipclean) { 173 pwarn("%sile system is clean; not checking\n", 174 preen ? "f" : "** F"); 175 return (-1); 176 } 177 if (!preen && !doswap) 178 pwarn("** File system is already clean\n"); 179 } 180 maxfsblock = sblock->fs_size; 181 maxino = sblock->fs_ncg * sblock->fs_ipg; 182 sizepb = sblock->fs_bsize; 183 maxfilesize = sblock->fs_bsize * NDADDR - 1; 184 for (i = 0; i < NIADDR; i++) { 185 sizepb *= NINDIR(sblock); 186 maxfilesize += sizepb; 187 } 188 /* 189 * Check and potentially fix certain fields in the super block. 190 */ 191 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 192 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 193 if (reply("SET TO DEFAULT") == 1) { 194 sblock->fs_optim = FS_OPTTIME; 195 sbdirty(); 196 } 197 } 198 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 199 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 200 sblock->fs_minfree); 201 if (reply("SET TO DEFAULT") == 1) { 202 sblock->fs_minfree = 10; 203 sbdirty(); 204 } 205 } 206 if (sblock->fs_interleave < 1 || 207 sblock->fs_interleave > sblock->fs_nsect) { 208 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 209 sblock->fs_interleave); 210 sblock->fs_interleave = 1; 211 if (preen) 212 printf(" (FIXED)\n"); 213 if (preen || reply("SET TO DEFAULT") == 1) { 214 sbdirty(); 215 dirty(&asblk); 216 } 217 } 218 if (sblock->fs_npsect < sblock->fs_nsect || 219 sblock->fs_npsect > sblock->fs_nsect*2) { 220 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 221 sblock->fs_npsect); 222 sblock->fs_npsect = sblock->fs_nsect; 223 if (preen) 224 printf(" (FIXED)\n"); 225 if (preen || reply("SET TO DEFAULT") == 1) { 226 sbdirty(); 227 dirty(&asblk); 228 } 229 } 230 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 231 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 232 sblock->fs_bmask); 233 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 234 if (preen) 235 printf(" (FIXED)\n"); 236 if (preen || reply("FIX") == 1) { 237 sbdirty(); 238 dirty(&asblk); 239 } 240 } 241 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 242 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 243 sblock->fs_fmask); 244 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 245 if (preen) 246 printf(" (FIXED)\n"); 247 if (preen || reply("FIX") == 1) { 248 sbdirty(); 249 dirty(&asblk); 250 } 251 } 252 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 253 if (sblock->fs_maxfilesize != maxfilesize) { 254 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 255 (unsigned long long)sblock->fs_maxfilesize); 256 sblock->fs_maxfilesize = maxfilesize; 257 if (preen) 258 printf(" (FIXED)\n"); 259 if (preen || reply("FIX") == 1) { 260 sbdirty(); 261 dirty(&asblk); 262 } 263 } 264 if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { 265 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 266 sblock->fs_maxsymlinklen); 267 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 268 if (preen) 269 printf(" (FIXED)\n"); 270 if (preen || reply("FIX") == 1) { 271 sbdirty(); 272 dirty(&asblk); 273 } 274 } 275 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 276 pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK", 277 (unsigned long long)sblock->fs_qbmask); 278 sblock->fs_qbmask = ~sblock->fs_bmask; 279 if (preen) 280 printf(" (FIXED)\n"); 281 if (preen || reply("FIX") == 1) { 282 sbdirty(); 283 dirty(&asblk); 284 } 285 } 286 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 287 pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK", 288 (unsigned long long)sblock->fs_qfmask); 289 sblock->fs_qfmask = ~sblock->fs_fmask; 290 if (preen) 291 printf(" (FIXED)\n"); 292 if (preen || reply("FIX") == 1) { 293 sbdirty(); 294 dirty(&asblk); 295 } 296 } 297 newinofmt = 1; 298 } else { 299 sblock->fs_qbmask = ~sblock->fs_bmask; 300 sblock->fs_qfmask = ~sblock->fs_fmask; 301 newinofmt = 0; 302 } 303 /* 304 * Convert to new inode format. 305 */ 306 if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { 307 if (preen) 308 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 309 else if (!reply("CONVERT TO NEW INODE FORMAT")) 310 return(0); 311 doinglevel2++; 312 sblock->fs_inodefmt = FS_44INODEFMT; 313 sblock->fs_maxfilesize = maxfilesize; 314 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 315 sblock->fs_qbmask = ~sblock->fs_bmask; 316 sblock->fs_qfmask = ~sblock->fs_fmask; 317 sbdirty(); 318 dirty(&asblk); 319 } 320 /* 321 * Convert to new cylinder group format. 322 */ 323 if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { 324 if (preen) 325 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 326 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 327 return(0); 328 doinglevel1++; 329 sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; 330 sblock->fs_nrpos = 8; 331 sblock->fs_postbloff = 332 (char *)(&sblock->fs_opostbl[0][0]) - 333 (char *)(&sblock->fs_firstfield); 334 sblock->fs_rotbloff = &sblock->fs_space[0] - 335 (u_char *)(&sblock->fs_firstfield); 336 sblock->fs_cgsize = 337 fragroundup(sblock, CGSIZE(sblock)); 338 sbdirty(); 339 dirty(&asblk); 340 } 341 if (asblk.b_dirty && !bflag) { 342 memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); 343 if (needswap) 344 ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs); 345 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 346 flush(fswritefd, &asblk); 347 } 348 /* 349 * read in the summary info. 350 */ 351 asked = 0; 352 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 353 size = sblock->fs_cssize - i < sblock->fs_bsize ? 354 sblock->fs_cssize - i : sblock->fs_bsize; 355 sblock->fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 356 if (bread(fsreadfd, (char *)sblock->fs_csp[j], 357 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 358 size) != 0 && !asked) { 359 pfatal("BAD SUMMARY INFORMATION"); 360 if (reply("CONTINUE") == 0) { 361 markclean = 0; 362 exit(EEXIT); 363 } 364 asked++; 365 } 366 /* 367 * The following assumes that struct csum is made of 368 * u_int32_t 369 */ 370 if (doswap) { 371 int k; 372 u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; 373 374 for (k = 0; k < size / sizeof(u_int32_t); k++) 375 cd[k] = bswap32(cd[k]); 376 bwrite(fswritefd, (char *)sblock->fs_csp[j], 377 fsbtodb(sblock, 378 sblock->fs_csaddr + j * sblock->fs_frag), 379 size); 380 } 381 if (needswap) { 382 int k; 383 u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; 384 385 for (k = 0; k < size / sizeof(u_int32_t); k++) 386 cd[k] = bswap32(cd[k]); 387 } 388 } 389 /* 390 * allocate and initialize the necessary maps 391 */ 392 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 393 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 394 if (blockmap == NULL) { 395 printf("cannot alloc %u bytes for blockmap\n", 396 (unsigned)bmapsize); 397 goto badsblabel; 398 } 399 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 400 if (statemap == NULL) { 401 printf("cannot alloc %u bytes for statemap\n", 402 (unsigned)(maxino + 1)); 403 goto badsblabel; 404 } 405 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 406 if (typemap == NULL) { 407 printf("cannot alloc %u bytes for typemap\n", 408 (unsigned)(maxino + 1)); 409 goto badsblabel; 410 } 411 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 412 if (lncntp == NULL) { 413 printf("cannot alloc %u bytes for lncntp\n", 414 (unsigned)((maxino + 1) * sizeof(int16_t))); 415 goto badsblabel; 416 } 417 /* 418 * cs_ndir may be inaccurate, particularly if we're using the -b 419 * option, so set a minimum to prevent bogus subdirectory reconnects 420 * and really inefficient directory scans. 421 * Also set a maximum in case the value is too large. 422 */ 423 numdirs = sblock->fs_cstotal.cs_ndir; 424 if (numdirs < 1024) 425 numdirs = 1024; 426 if (numdirs > maxino + 1) 427 numdirs = maxino + 1; 428 inplast = 0; 429 listmax = numdirs + 10; 430 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 431 sizeof(struct inoinfo *)); 432 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 433 sizeof(struct inoinfo *)); 434 if (inpsort == NULL || inphead == NULL) { 435 printf("cannot alloc %u bytes for inphead\n", 436 (unsigned)(numdirs * sizeof(struct inoinfo *))); 437 goto badsblabel; 438 } 439 cgrp = malloc(sblock->fs_cgsize); 440 if (cgrp == NULL) { 441 printf("cannot alloc %u bytes for cylinder group\n", 442 sblock->fs_cgsize); 443 goto badsblabel; 444 } 445 bufinit(); 446 if (sblock->fs_flags & FS_DOSOFTDEP) 447 usedsoftdep = 1; 448 else 449 usedsoftdep = 0; 450 return (1); 451 452 badsblabel: 453 markclean=0; 454 ckfini(); 455 return (0); 456 } 457 458 /* 459 * Read in the super block and its summary info. 460 */ 461 static int 462 readsb(listerr) 463 int listerr; 464 { 465 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 466 struct fs *fs; 467 468 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 469 return (0); 470 sblk.b_bno = super; 471 sblk.b_size = SBSIZE; 472 473 fs = sblk.b_un.b_fs; 474 /* auto detect byte order */ 475 if( fs->fs_magic == FS_MAGIC) { 476 if (endian == 0 || BYTE_ORDER == endian) { 477 needswap = 0; 478 doswap = do_blkswap = do_dirswap = 0; 479 } else { 480 needswap = 1; 481 doswap = do_blkswap = do_dirswap = 1; 482 } 483 } else if (fs->fs_magic == bswap32(FS_MAGIC)) { 484 if (endian == 0 || BYTE_ORDER != endian) { 485 needswap = 1; 486 doswap = do_blkswap = do_dirswap = 0; 487 } else { 488 needswap = 0; 489 doswap = do_blkswap = do_dirswap = 1; 490 } 491 } else { 492 badsb(listerr, "MAGIC NUMBER WRONG"); 493 return (0); 494 } 495 if (doswap) { 496 if (preen) 497 errx(EEXIT, "incompatible options -B and -p"); 498 if (nflag) 499 errx(EEXIT, "incompatible options -B and -n"); 500 if (endian == LITTLE_ENDIAN) { 501 if (!reply("CONVERT TO LITTLE ENDIAN")) 502 return 0; 503 } else if (endian == BIG_ENDIAN) { 504 if (!reply("CONVERT TO BIG ENDIAN")) 505 return 0; 506 } else 507 pfatal("INTERNAL ERROR: unknown endian"); 508 } 509 if (needswap) 510 printf("** Swapped byte order\n"); 511 /* swap SB byte order if asked */ 512 if (doswap) 513 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 514 515 memmove(sblock, sblk.b_un.b_fs, SBSIZE); 516 if (needswap) 517 ffs_sb_swap(sblk.b_un.b_fs, sblock); 518 519 /* 520 * run a few consistency checks of the super block 521 */ 522 if (sblock->fs_ncg < 1) 523 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 524 if (sblock->fs_cpg < 1) 525 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 526 if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || 527 (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) 528 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 529 if (sblock->fs_sbsize > SBSIZE) 530 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 531 /* 532 * Compute block size that the filesystem is based on, 533 * according to fsbtodb, and adjust superblock block number 534 * so we can tell if this is an alternate later. 535 */ 536 super *= dev_bsize; 537 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 538 sblk.b_bno = super / dev_bsize; 539 540 if (bflag) { 541 havesb = 1; 542 return (1); 543 } 544 /* 545 * Set all possible fields that could differ, then do check 546 * of whole super block against an alternate super block. 547 * When an alternate super-block is specified this check is skipped. 548 */ 549 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 550 if (asblk.b_errs) 551 return (0); 552 /* swap SB byte order if asked */ 553 if (doswap) 554 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 555 556 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 557 if (needswap) 558 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 559 if (cmpsblks(sblock, altsblock)) { 560 if (debug) { 561 long *nlp, *olp, *endlp; 562 563 printf("superblock mismatches\n"); 564 nlp = (long *)altsblock; 565 olp = (long *)sblock; 566 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 567 for ( ; olp < endlp; olp++, nlp++) { 568 if (*olp == *nlp) 569 continue; 570 printf("offset %ld, original %lx, alternate %lx\n", 571 (long)(olp - (long *)sblock), *olp, *nlp); 572 } 573 } 574 badsb(listerr, 575 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 576 return (0); 577 } 578 /* Now we know the SB is valid, we can write it back if needed */ 579 if (doswap) { 580 sbdirty(); 581 dirty(&asblk); 582 } 583 havesb = 1; 584 return (1); 585 } 586 587 int 588 cmpsblks(const struct fs *sb, struct fs *asb) 589 { 590 591 asb->fs_firstfield = sb->fs_firstfield; 592 asb->fs_fscktime = sb->fs_fscktime; 593 asb->fs_unused_1 = sb->fs_unused_1; 594 asb->fs_time = sb->fs_time; 595 asb->fs_cstotal = sb->fs_cstotal; 596 asb->fs_cgrotor = sb->fs_cgrotor; 597 asb->fs_fmod = sb->fs_fmod; 598 asb->fs_clean = sb->fs_clean; 599 asb->fs_ronly = sb->fs_ronly; 600 asb->fs_flags = sb->fs_flags; 601 asb->fs_maxcontig = sb->fs_maxcontig; 602 asb->fs_minfree = sb->fs_minfree; 603 asb->fs_optim = sb->fs_optim; 604 asb->fs_rotdelay = sb->fs_rotdelay; 605 asb->fs_maxbpg = sb->fs_maxbpg; 606 memmove(asb->fs_csp, sb->fs_csp, sizeof sb->fs_csp); 607 asb->fs_maxcluster = sb->fs_maxcluster; 608 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 609 memmove(asb->fs_sparecon, 610 sb->fs_sparecon, sizeof sb->fs_sparecon); 611 /* 612 * The following should not have to be copied. 613 */ 614 asb->fs_fsbtodb = sb->fs_fsbtodb; 615 asb->fs_interleave = sb->fs_interleave; 616 asb->fs_npsect = sb->fs_npsect; 617 asb->fs_nrpos = sb->fs_nrpos; 618 asb->fs_state = sb->fs_state; 619 asb->fs_qbmask = sb->fs_qbmask; 620 asb->fs_qfmask = sb->fs_qfmask; 621 asb->fs_state = sb->fs_state; 622 asb->fs_maxfilesize = sb->fs_maxfilesize; 623 624 return (memcmp(sb, asb, (int)sb->fs_sbsize)); 625 } 626 627 static void 628 badsb(listerr, s) 629 int listerr; 630 char *s; 631 { 632 633 if (!listerr) 634 return; 635 if (preen) 636 printf("%s: ", cdevname()); 637 pfatal("BAD SUPER BLOCK: %s\n", s); 638 } 639 640 /* 641 * Calculate a prototype superblock based on information in the disk label. 642 * When done the cgsblock macro can be calculated and the fs_ncg field 643 * can be used. Do NOT attempt to use other macros without verifying that 644 * their needed information is available! 645 */ 646 static int 647 calcsb(dev, devfd, fs) 648 const char *dev; 649 int devfd; 650 struct fs *fs; 651 { 652 struct disklabel *lp; 653 struct partition *pp; 654 char *cp; 655 int i; 656 657 cp = strchr(dev, '\0') - 1; 658 if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'h')) && !isdigit(*cp)) { 659 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 660 return (0); 661 } 662 lp = getdisklabel(dev, devfd); 663 if (isdigit(*cp)) 664 pp = &lp->d_partitions[0]; 665 else 666 pp = &lp->d_partitions[*cp - 'a']; 667 if (pp->p_fstype != FS_BSDFFS) { 668 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 669 dev, pp->p_fstype < FSMAXTYPES ? 670 fstypenames[pp->p_fstype] : "unknown"); 671 return (0); 672 } 673 /* avoid divide by 0 */ 674 if (pp->p_fsize == 0 || pp->p_frag == 0) 675 return (0); 676 memset(fs, 0, sizeof(struct fs)); 677 fs->fs_fsize = pp->p_fsize; 678 fs->fs_frag = pp->p_frag; 679 fs->fs_cpg = pp->p_cpg; 680 fs->fs_size = pp->p_size; 681 fs->fs_ntrak = lp->d_ntracks; 682 fs->fs_nsect = lp->d_nsectors; 683 fs->fs_spc = lp->d_secpercyl; 684 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 685 fs->fs_sblkno = roundup( 686 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 687 fs->fs_frag); 688 fs->fs_cgmask = 0xffffffff; 689 for (i = fs->fs_ntrak; i > 1; i >>= 1) 690 fs->fs_cgmask <<= 1; 691 if (!POWEROF2(fs->fs_ntrak)) 692 fs->fs_cgmask <<= 1; 693 fs->fs_cgoffset = roundup( 694 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 695 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 696 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 697 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 698 fs->fs_fsbtodb++; 699 dev_bsize = lp->d_secsize; 700 return (1); 701 } 702 703 static struct disklabel * 704 getdisklabel(s, fd) 705 const char *s; 706 int fd; 707 { 708 static struct disklabel lab; 709 710 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 711 if (s == NULL) 712 return ((struct disklabel *)NULL); 713 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 714 errx(EEXIT, "%s: can't read disk label", s); 715 } 716 return (&lab); 717 } 718
Indexes created Thu Sep 25 08:09:54 GMT 2025