setup.c revision 1.49
1 /* $NetBSD: setup.c,v 1.49 2001/09/06 02:16:00 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 1.49 2001/09/06 02:16:00 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 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 (forceimage) { 103 if (!S_ISREG(statb.st_mode)) { 104 pfatal("%s is not a regular file", dev); 105 if (reply("CONTINUE") == 0) 106 return (0); 107 } 108 } else if (!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 (preen == 0) 118 printf("** %s", dev); 119 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 120 fswritefd = -1; 121 if (preen) 122 pfatal("NO WRITE ACCESS"); 123 printf(" (NO WRITE)"); 124 } 125 if (preen == 0) 126 printf("\n"); 127 fsmodified = 0; 128 lfdir = 0; 129 initbarea(&sblk); 130 initbarea(&asblk); 131 sblk.b_un.b_buf = malloc(SBSIZE); 132 sblock = malloc(SBSIZE); 133 asblk.b_un.b_buf = malloc(SBSIZE); 134 altsblock = malloc(SBSIZE); 135 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || 136 sblock == NULL || altsblock == NULL) 137 errx(EEXIT, "cannot allocate space for superblock"); 138 if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) 139 dev_bsize = secsize = lp->d_secsize; 140 else 141 dev_bsize = secsize = DEV_BSIZE; 142 /* 143 * Read in the superblock, looking for alternates if necessary 144 */ 145 if (readsb(1) == 0) { 146 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 147 return(0); 148 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 149 return (0); 150 for (cg = 0; cg < proto.fs_ncg; cg++) { 151 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 152 if (readsb(0) != 0) 153 break; 154 } 155 if (cg >= proto.fs_ncg) { 156 printf("%s %s\n%s %s\n%s %s\n", 157 "SEARCH FOR ALTERNATE SUPER-BLOCK", 158 "FAILED. YOU MUST USE THE", 159 "-b OPTION TO fsck_ffs TO SPECIFY THE", 160 "LOCATION OF AN ALTERNATE", 161 "SUPER-BLOCK TO SUPPLY NEEDED", 162 "INFORMATION; SEE fsck_ffs(8)."); 163 return(0); 164 } 165 doskipclean = 0; 166 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 167 } 168 if (debug) 169 printf("clean = %d\n", sblock->fs_clean); 170 if (doswap) 171 doskipclean = 0; 172 if (sblock->fs_clean & FS_ISCLEAN) { 173 if (doskipclean) { 174 pwarn("%sile system is clean; not checking\n", 175 preen ? "f" : "** F"); 176 return (-1); 177 } 178 if (!preen && !doswap) 179 pwarn("** File system is already clean\n"); 180 } 181 maxfsblock = sblock->fs_size; 182 maxino = sblock->fs_ncg * sblock->fs_ipg; 183 sizepb = sblock->fs_bsize; 184 maxfilesize = sblock->fs_bsize * NDADDR - 1; 185 for (i = 0; i < NIADDR; i++) { 186 sizepb *= NINDIR(sblock); 187 maxfilesize += sizepb; 188 } 189 /* 190 * Check and potentially fix certain fields in the super block. 191 */ 192 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 193 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 194 if (reply("SET TO DEFAULT") == 1) { 195 sblock->fs_optim = FS_OPTTIME; 196 sbdirty(); 197 } 198 } 199 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 200 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 201 sblock->fs_minfree); 202 if (reply("SET TO DEFAULT") == 1) { 203 sblock->fs_minfree = 10; 204 sbdirty(); 205 } 206 } 207 if (sblock->fs_interleave < 1 || 208 sblock->fs_interleave > sblock->fs_nsect) { 209 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 210 sblock->fs_interleave); 211 sblock->fs_interleave = 1; 212 if (preen) 213 printf(" (FIXED)\n"); 214 if (preen || reply("SET TO DEFAULT") == 1) { 215 sbdirty(); 216 dirty(&asblk); 217 } 218 } 219 if (sblock->fs_npsect < sblock->fs_nsect || 220 sblock->fs_npsect > sblock->fs_nsect*2) { 221 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 222 sblock->fs_npsect); 223 sblock->fs_npsect = sblock->fs_nsect; 224 if (preen) 225 printf(" (FIXED)\n"); 226 if (preen || reply("SET TO DEFAULT") == 1) { 227 sbdirty(); 228 dirty(&asblk); 229 } 230 } 231 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 232 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 233 sblock->fs_bmask); 234 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 235 if (preen) 236 printf(" (FIXED)\n"); 237 if (preen || reply("FIX") == 1) { 238 sbdirty(); 239 dirty(&asblk); 240 } 241 } 242 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 243 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 244 sblock->fs_fmask); 245 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 246 if (preen) 247 printf(" (FIXED)\n"); 248 if (preen || reply("FIX") == 1) { 249 sbdirty(); 250 dirty(&asblk); 251 } 252 } 253 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 254 if (sblock->fs_maxfilesize != maxfilesize) { 255 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 256 (unsigned long long)sblock->fs_maxfilesize); 257 sblock->fs_maxfilesize = maxfilesize; 258 if (preen) 259 printf(" (FIXED)\n"); 260 if (preen || reply("FIX") == 1) { 261 sbdirty(); 262 dirty(&asblk); 263 } 264 } 265 if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { 266 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 267 sblock->fs_maxsymlinklen); 268 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 269 if (preen) 270 printf(" (FIXED)\n"); 271 if (preen || reply("FIX") == 1) { 272 sbdirty(); 273 dirty(&asblk); 274 } 275 } 276 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 277 pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK", 278 (unsigned long long)sblock->fs_qbmask); 279 sblock->fs_qbmask = ~sblock->fs_bmask; 280 if (preen) 281 printf(" (FIXED)\n"); 282 if (preen || reply("FIX") == 1) { 283 sbdirty(); 284 dirty(&asblk); 285 } 286 } 287 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 288 pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK", 289 (unsigned long long)sblock->fs_qfmask); 290 sblock->fs_qfmask = ~sblock->fs_fmask; 291 if (preen) 292 printf(" (FIXED)\n"); 293 if (preen || reply("FIX") == 1) { 294 sbdirty(); 295 dirty(&asblk); 296 } 297 } 298 newinofmt = 1; 299 } else { 300 sblock->fs_qbmask = ~sblock->fs_bmask; 301 sblock->fs_qfmask = ~sblock->fs_fmask; 302 newinofmt = 0; 303 } 304 /* 305 * Convert to new inode format. 306 */ 307 if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { 308 if (preen) 309 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 310 else if (!reply("CONVERT TO NEW INODE FORMAT")) 311 return(0); 312 doinglevel2++; 313 sblock->fs_inodefmt = FS_44INODEFMT; 314 sblock->fs_maxfilesize = maxfilesize; 315 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 316 sblock->fs_qbmask = ~sblock->fs_bmask; 317 sblock->fs_qfmask = ~sblock->fs_fmask; 318 sbdirty(); 319 dirty(&asblk); 320 } 321 /* 322 * Convert to new cylinder group format. 323 */ 324 if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { 325 if (preen) 326 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 327 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 328 return(0); 329 doinglevel1++; 330 sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; 331 sblock->fs_nrpos = 8; 332 sblock->fs_postbloff = 333 (char *)(&sblock->fs_opostbl[0][0]) - 334 (char *)(&sblock->fs_firstfield); 335 sblock->fs_rotbloff = &sblock->fs_space[0] - 336 (u_char *)(&sblock->fs_firstfield); 337 sblock->fs_cgsize = 338 fragroundup(sblock, CGSIZE(sblock)); 339 sbdirty(); 340 dirty(&asblk); 341 } 342 if (asblk.b_dirty && !bflag) { 343 memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); 344 if (needswap) 345 ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs); 346 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 347 flush(fswritefd, &asblk); 348 } 349 /* 350 * read in the summary info. 351 */ 352 asked = 0; 353 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 354 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 355 size = sblock->fs_cssize - i < sblock->fs_bsize ? 356 sblock->fs_cssize - i : sblock->fs_bsize; 357 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 358 if (bread(fsreadfd, (char *)ccsp, 359 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 360 size) != 0 && !asked) { 361 pfatal("BAD SUMMARY INFORMATION"); 362 if (reply("CONTINUE") == 0) { 363 markclean = 0; 364 exit(EEXIT); 365 } 366 asked++; 367 } 368 if (doswap) { 369 ffs_csum_swap(ccsp, ccsp, size); 370 bwrite(fswritefd, (char *)ccsp, 371 fsbtodb(sblock, 372 sblock->fs_csaddr + j * sblock->fs_frag), 373 size); 374 } 375 if (needswap) 376 ffs_csum_swap(ccsp, ccsp, size); 377 } 378 /* 379 * allocate and initialize the necessary maps 380 */ 381 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 382 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 383 if (blockmap == NULL) { 384 printf("cannot alloc %u bytes for blockmap\n", 385 (unsigned)bmapsize); 386 goto badsblabel; 387 } 388 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 389 if (statemap == NULL) { 390 printf("cannot alloc %u bytes for statemap\n", 391 (unsigned)(maxino + 1)); 392 goto badsblabel; 393 } 394 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 395 if (typemap == NULL) { 396 printf("cannot alloc %u bytes for typemap\n", 397 (unsigned)(maxino + 1)); 398 goto badsblabel; 399 } 400 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 401 if (lncntp == NULL) { 402 printf("cannot alloc %u bytes for lncntp\n", 403 (unsigned)((maxino + 1) * sizeof(int16_t))); 404 goto badsblabel; 405 } 406 /* 407 * cs_ndir may be inaccurate, particularly if we're using the -b 408 * option, so set a minimum to prevent bogus subdirectory reconnects 409 * and really inefficient directory scans. 410 * Also set a maximum in case the value is too large. 411 */ 412 numdirs = sblock->fs_cstotal.cs_ndir; 413 if (numdirs < 1024) 414 numdirs = 1024; 415 if (numdirs > maxino + 1) 416 numdirs = maxino + 1; 417 inplast = 0; 418 listmax = numdirs + 10; 419 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 420 sizeof(struct inoinfo *)); 421 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 422 sizeof(struct inoinfo *)); 423 if (inpsort == NULL || inphead == NULL) { 424 printf("cannot alloc %u bytes for inphead\n", 425 (unsigned)(numdirs * sizeof(struct inoinfo *))); 426 goto badsblabel; 427 } 428 cgrp = malloc(sblock->fs_cgsize); 429 if (cgrp == NULL) { 430 printf("cannot alloc %u bytes for cylinder group\n", 431 sblock->fs_cgsize); 432 goto badsblabel; 433 } 434 bufinit(); 435 if (sblock->fs_flags & FS_DOSOFTDEP) 436 usedsoftdep = 1; 437 else 438 usedsoftdep = 0; 439 return (1); 440 441 badsblabel: 442 markclean=0; 443 ckfini(); 444 return (0); 445 } 446 447 /* 448 * Read in the super block and its summary info. 449 */ 450 static int 451 readsb(listerr) 452 int listerr; 453 { 454 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 455 struct fs *fs; 456 457 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 458 return (0); 459 sblk.b_bno = super; 460 sblk.b_size = SBSIZE; 461 462 fs = sblk.b_un.b_fs; 463 /* auto detect byte order */ 464 if( fs->fs_magic == FS_MAGIC) { 465 if (endian == 0 || BYTE_ORDER == endian) { 466 needswap = 0; 467 doswap = do_blkswap = do_dirswap = 0; 468 } else { 469 needswap = 1; 470 doswap = do_blkswap = do_dirswap = 1; 471 } 472 } else if (fs->fs_magic == bswap32(FS_MAGIC)) { 473 if (endian == 0 || BYTE_ORDER != endian) { 474 needswap = 1; 475 doswap = do_blkswap = do_dirswap = 0; 476 } else { 477 needswap = 0; 478 doswap = do_blkswap = do_dirswap = 1; 479 } 480 } else { 481 badsb(listerr, "MAGIC NUMBER WRONG"); 482 return (0); 483 } 484 if (doswap) { 485 if (preen) 486 errx(EEXIT, "incompatible options -B and -p"); 487 if (nflag) 488 errx(EEXIT, "incompatible options -B and -n"); 489 if (endian == LITTLE_ENDIAN) { 490 if (!reply("CONVERT TO LITTLE ENDIAN")) 491 return 0; 492 } else if (endian == BIG_ENDIAN) { 493 if (!reply("CONVERT TO BIG ENDIAN")) 494 return 0; 495 } else 496 pfatal("INTERNAL ERROR: unknown endian"); 497 } 498 if (needswap) 499 printf("** Swapped byte order\n"); 500 /* swap SB byte order if asked */ 501 if (doswap) 502 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 503 504 memmove(sblock, sblk.b_un.b_fs, SBSIZE); 505 if (needswap) 506 ffs_sb_swap(sblk.b_un.b_fs, sblock); 507 508 /* 509 * run a few consistency checks of the super block 510 */ 511 if (sblock->fs_ncg < 1) 512 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 513 if (sblock->fs_cpg < 1) 514 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 515 if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || 516 (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) 517 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 518 if (sblock->fs_sbsize > SBSIZE) 519 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 520 /* 521 * Compute block size that the filesystem is based on, 522 * according to fsbtodb, and adjust superblock block number 523 * so we can tell if this is an alternate later. 524 */ 525 super *= dev_bsize; 526 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 527 sblk.b_bno = super / dev_bsize; 528 529 if (bflag) { 530 havesb = 1; 531 return (1); 532 } 533 /* 534 * Set all possible fields that could differ, then do check 535 * of whole super block against an alternate super block. 536 * When an alternate super-block is specified this check is skipped. 537 */ 538 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 539 if (asblk.b_errs) 540 return (0); 541 /* swap SB byte order if asked */ 542 if (doswap) 543 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 544 545 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 546 if (needswap) 547 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 548 if (cmpsblks(sblock, altsblock)) { 549 if (debug) { 550 long *nlp, *olp, *endlp; 551 552 printf("superblock mismatches\n"); 553 nlp = (long *)altsblock; 554 olp = (long *)sblock; 555 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 556 for ( ; olp < endlp; olp++, nlp++) { 557 if (*olp == *nlp) 558 continue; 559 printf("offset %ld, original %lx, alternate %lx\n", 560 (long)(olp - (long *)sblock), *olp, *nlp); 561 } 562 } 563 badsb(listerr, 564 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 565 return (0); 566 } 567 /* Now we know the SB is valid, we can write it back if needed */ 568 if (doswap) { 569 sbdirty(); 570 dirty(&asblk); 571 } 572 havesb = 1; 573 return (1); 574 } 575 576 int 577 cmpsblks(const struct fs *sb, struct fs *asb) 578 { 579 580 asb->fs_firstfield = sb->fs_firstfield; 581 asb->fs_unused_1 = sb->fs_unused_1; 582 asb->fs_time = sb->fs_time; 583 asb->fs_cstotal = sb->fs_cstotal; 584 asb->fs_cgrotor = sb->fs_cgrotor; 585 asb->fs_fmod = sb->fs_fmod; 586 asb->fs_clean = sb->fs_clean; 587 asb->fs_ronly = sb->fs_ronly; 588 asb->fs_flags = sb->fs_flags; 589 asb->fs_maxcontig = sb->fs_maxcontig; 590 asb->fs_minfree = sb->fs_minfree; 591 asb->fs_optim = sb->fs_optim; 592 asb->fs_rotdelay = sb->fs_rotdelay; 593 asb->fs_maxbpg = sb->fs_maxbpg; 594 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 595 asb->fs_contigdirs = sb->fs_contigdirs; 596 asb->fs_csp = sb->fs_csp; 597 asb->fs_maxcluster = sb->fs_maxcluster; 598 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 599 memmove(asb->fs_snapinum, 600 sb->fs_snapinum, sizeof sb->fs_snapinum); 601 asb->fs_avgfilesize = sb->fs_avgfilesize; 602 asb->fs_avgfpdir = sb->fs_avgfpdir; 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_qbmask = sb->fs_qbmask; 613 asb->fs_qfmask = sb->fs_qfmask; 614 asb->fs_state = sb->fs_state; 615 asb->fs_maxfilesize = sb->fs_maxfilesize; 616 617 return (memcmp(sb, asb, (int)sb->fs_sbsize)); 618 } 619 620 static void 621 badsb(listerr, s) 622 int listerr; 623 char *s; 624 { 625 626 if (!listerr) 627 return; 628 if (preen) 629 printf("%s: ", cdevname()); 630 pfatal("BAD SUPER BLOCK: %s\n", s); 631 } 632 633 /* 634 * Calculate a prototype superblock based on information in the disk label. 635 * When done the cgsblock macro can be calculated and the fs_ncg field 636 * can be used. Do NOT attempt to use other macros without verifying that 637 * their needed information is available! 638 */ 639 static int 640 calcsb(dev, devfd, fs) 641 const char *dev; 642 int devfd; 643 struct fs *fs; 644 { 645 struct disklabel *lp; 646 struct partition *pp; 647 char *cp; 648 int i; 649 650 cp = strchr(dev, '\0') - 1; 651 if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'h')) && !isdigit(*cp)) { 652 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 653 return (0); 654 } 655 lp = getdisklabel(dev, devfd); 656 if (isdigit(*cp)) 657 pp = &lp->d_partitions[0]; 658 else 659 pp = &lp->d_partitions[*cp - 'a']; 660 if (pp->p_fstype != FS_BSDFFS) { 661 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 662 dev, pp->p_fstype < FSMAXTYPES ? 663 fstypenames[pp->p_fstype] : "unknown"); 664 return (0); 665 } 666 /* avoid divide by 0 */ 667 if (pp->p_fsize == 0 || pp->p_frag == 0) 668 return (0); 669 memset(fs, 0, sizeof(struct fs)); 670 fs->fs_fsize = pp->p_fsize; 671 fs->fs_frag = pp->p_frag; 672 fs->fs_cpg = pp->p_cpg; 673 fs->fs_size = pp->p_size; 674 fs->fs_ntrak = lp->d_ntracks; 675 fs->fs_nsect = lp->d_nsectors; 676 fs->fs_spc = lp->d_secpercyl; 677 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 678 fs->fs_sblkno = roundup( 679 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 680 fs->fs_frag); 681 fs->fs_cgmask = 0xffffffff; 682 for (i = fs->fs_ntrak; i > 1; i >>= 1) 683 fs->fs_cgmask <<= 1; 684 if (!POWEROF2(fs->fs_ntrak)) 685 fs->fs_cgmask <<= 1; 686 fs->fs_cgoffset = roundup( 687 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 688 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 689 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 690 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 691 fs->fs_fsbtodb++; 692 dev_bsize = lp->d_secsize; 693 return (1); 694 } 695 696 static struct disklabel * 697 getdisklabel(s, fd) 698 const char *s; 699 int fd; 700 { 701 static struct disklabel lab; 702 703 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 704 if (s == NULL) 705 return ((struct disklabel *)NULL); 706 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 707 errx(EEXIT, "%s: can't read disk label", s); 708 } 709 return (&lab); 710 } 711
Indexes created Fri Sep 26 08:10:20 GMT 2025