setup.c revision 1.53
1 /* $NetBSD: setup.c,v 1.53 2002/06/30 22:57:31 dbj 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 1.53 2002/06/30 22:57:31 dbj 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 && !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 (!forceimage && (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 || forceimage || 141 calcsb(dev, fsreadfd, &proto) == 0) 142 return(0); 143 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 144 return (0); 145 for (cg = 0; cg < proto.fs_ncg; cg++) { 146 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 147 if (readsb(0) != 0) 148 break; 149 } 150 if (cg >= proto.fs_ncg) { 151 printf("%s %s\n%s %s\n%s %s\n", 152 "SEARCH FOR ALTERNATE SUPER-BLOCK", 153 "FAILED. YOU MUST USE THE", 154 "-b OPTION TO fsck_ffs TO SPECIFY THE", 155 "LOCATION OF AN ALTERNATE", 156 "SUPER-BLOCK TO SUPPLY NEEDED", 157 "INFORMATION; SEE fsck_ffs(8)."); 158 return(0); 159 } 160 doskipclean = 0; 161 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 162 } 163 if (debug) 164 printf("clean = %d\n", sblock->fs_clean); 165 if (doswap) 166 doskipclean = 0; 167 if (sblock->fs_clean & FS_ISCLEAN) { 168 if (doskipclean) { 169 pwarn("%sile system is clean; not checking\n", 170 preen ? "f" : "** F"); 171 return (-1); 172 } 173 if (!preen && !doswap) 174 pwarn("** File system is already clean\n"); 175 } 176 maxfsblock = sblock->fs_size; 177 maxino = sblock->fs_ncg * sblock->fs_ipg; 178 sizepb = sblock->fs_bsize; 179 maxfilesize = sblock->fs_bsize * NDADDR - 1; 180 for (i = 0; i < NIADDR; i++) { 181 sizepb *= NINDIR(sblock); 182 maxfilesize += sizepb; 183 } 184 /* 185 * Check and potentially fix certain fields in the super block. 186 */ 187 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { 188 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 189 if (reply("SET TO DEFAULT") == 1) { 190 sblock->fs_optim = FS_OPTTIME; 191 sbdirty(); 192 } 193 } 194 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { 195 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 196 sblock->fs_minfree); 197 if (reply("SET TO DEFAULT") == 1) { 198 sblock->fs_minfree = 10; 199 sbdirty(); 200 } 201 } 202 if (sblock->fs_postblformat != FS_42POSTBLFMT && 203 (sblock->fs_interleave < 1 || 204 sblock->fs_interleave > sblock->fs_nsect)) { 205 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 206 sblock->fs_interleave); 207 sblock->fs_interleave = 1; 208 if (preen) 209 printf(" (FIXED)\n"); 210 if (preen || reply("SET TO DEFAULT") == 1) { 211 sbdirty(); 212 dirty(&asblk); 213 } 214 } 215 if (sblock->fs_postblformat != FS_42POSTBLFMT && 216 (sblock->fs_npsect < sblock->fs_nsect || 217 sblock->fs_npsect > sblock->fs_nsect*2)) { 218 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 219 sblock->fs_npsect); 220 sblock->fs_npsect = sblock->fs_nsect; 221 if (preen) 222 printf(" (FIXED)\n"); 223 if (preen || reply("SET TO DEFAULT") == 1) { 224 sbdirty(); 225 dirty(&asblk); 226 } 227 } 228 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { 229 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", 230 sblock->fs_bmask); 231 sblock->fs_bmask = ~(sblock->fs_bsize - 1); 232 if (preen) 233 printf(" (FIXED)\n"); 234 if (preen || reply("FIX") == 1) { 235 sbdirty(); 236 dirty(&asblk); 237 } 238 } 239 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { 240 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", 241 sblock->fs_fmask); 242 sblock->fs_fmask = ~(sblock->fs_fsize - 1); 243 if (preen) 244 printf(" (FIXED)\n"); 245 if (preen || reply("FIX") == 1) { 246 sbdirty(); 247 dirty(&asblk); 248 } 249 } 250 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 251 if (sblock->fs_maxfilesize != maxfilesize) { 252 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", 253 (unsigned long long)sblock->fs_maxfilesize); 254 sblock->fs_maxfilesize = maxfilesize; 255 if (preen) 256 printf(" (FIXED)\n"); 257 if (preen || reply("FIX") == 1) { 258 sbdirty(); 259 dirty(&asblk); 260 } 261 } 262 if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { 263 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", 264 sblock->fs_maxsymlinklen); 265 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 266 if (preen) 267 printf(" (FIXED)\n"); 268 if (preen || reply("FIX") == 1) { 269 sbdirty(); 270 dirty(&asblk); 271 } 272 } 273 if (sblock->fs_qbmask != ~sblock->fs_bmask) { 274 pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK", 275 (unsigned long long)sblock->fs_qbmask); 276 sblock->fs_qbmask = ~sblock->fs_bmask; 277 if (preen) 278 printf(" (FIXED)\n"); 279 if (preen || reply("FIX") == 1) { 280 sbdirty(); 281 dirty(&asblk); 282 } 283 } 284 if (sblock->fs_qfmask != ~sblock->fs_fmask) { 285 pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK", 286 (unsigned long long)sblock->fs_qfmask); 287 sblock->fs_qfmask = ~sblock->fs_fmask; 288 if (preen) 289 printf(" (FIXED)\n"); 290 if (preen || reply("FIX") == 1) { 291 sbdirty(); 292 dirty(&asblk); 293 } 294 } 295 newinofmt = 1; 296 } else { 297 sblock->fs_qbmask = ~sblock->fs_bmask; 298 sblock->fs_qfmask = ~sblock->fs_fmask; 299 newinofmt = 0; 300 } 301 /* 302 * Convert to new inode format. 303 */ 304 if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { 305 if (preen) 306 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 307 else if (!reply("CONVERT TO NEW INODE FORMAT")) 308 return(0); 309 doinglevel2++; 310 sblock->fs_inodefmt = FS_44INODEFMT; 311 sblock->fs_maxfilesize = maxfilesize; 312 sblock->fs_maxsymlinklen = MAXSYMLINKLEN; 313 sblock->fs_qbmask = ~sblock->fs_bmask; 314 sblock->fs_qfmask = ~sblock->fs_fmask; 315 sbdirty(); 316 dirty(&asblk); 317 } 318 /* 319 * Convert to new cylinder group format. 320 */ 321 if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { 322 if (preen) 323 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 324 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 325 return(0); 326 doinglevel1++; 327 sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; 328 sblock->fs_nrpos = 8; 329 if (sblock->fs_npsect < sblock->fs_nsect) 330 sblock->fs_npsect = sblock->fs_nsect; 331 if (sblock->fs_interleave < 1) 332 sblock->fs_interleave = 1; 333 sblock->fs_postbloff = 334 (char *)(&sblock->fs_opostbl[0][0]) - 335 (char *)(&sblock->fs_firstfield); 336 sblock->fs_rotbloff = &sblock->fs_space[0] - 337 (u_char *)(&sblock->fs_firstfield); 338 sblock->fs_cgsize = 339 fragroundup(sblock, CGSIZE(sblock)); 340 sbdirty(); 341 dirty(&asblk); 342 } 343 if (asblk.b_dirty && !bflag) { 344 memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); 345 if (needswap) 346 ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs); 347 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); 348 flush(fswritefd, &asblk); 349 } 350 /* 351 * read in the summary info. 352 */ 353 asked = 0; 354 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize); 355 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { 356 size = sblock->fs_cssize - i < sblock->fs_bsize ? 357 sblock->fs_cssize - i : sblock->fs_bsize; 358 ccsp = (struct csum *)((char *)sblock->fs_csp + i); 359 if (bread(fsreadfd, (char *)ccsp, 360 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), 361 size) != 0 && !asked) { 362 pfatal("BAD SUMMARY INFORMATION"); 363 if (reply("CONTINUE") == 0) { 364 markclean = 0; 365 exit(EEXIT); 366 } 367 asked++; 368 } 369 if (doswap) { 370 ffs_csum_swap(ccsp, ccsp, size); 371 bwrite(fswritefd, (char *)ccsp, 372 fsbtodb(sblock, 373 sblock->fs_csaddr + j * sblock->fs_frag), 374 size); 375 } 376 if (needswap) 377 ffs_csum_swap(ccsp, ccsp, size); 378 } 379 /* 380 * allocate and initialize the necessary maps 381 */ 382 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 383 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 384 if (blockmap == NULL) { 385 printf("cannot alloc %u bytes for blockmap\n", 386 (unsigned)bmapsize); 387 goto badsblabel; 388 } 389 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 390 if (statemap == NULL) { 391 printf("cannot alloc %u bytes for statemap\n", 392 (unsigned)(maxino + 1)); 393 goto badsblabel; 394 } 395 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 396 if (typemap == NULL) { 397 printf("cannot alloc %u bytes for typemap\n", 398 (unsigned)(maxino + 1)); 399 goto badsblabel; 400 } 401 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 402 if (lncntp == NULL) { 403 printf("cannot alloc %u bytes for lncntp\n", 404 (unsigned)((maxino + 1) * sizeof(int16_t))); 405 goto badsblabel; 406 } 407 /* 408 * cs_ndir may be inaccurate, particularly if we're using the -b 409 * option, so set a minimum to prevent bogus subdirectory reconnects 410 * and really inefficient directory scans. 411 * Also set a maximum in case the value is too large. 412 */ 413 numdirs = sblock->fs_cstotal.cs_ndir; 414 if (numdirs < 1024) 415 numdirs = 1024; 416 if (numdirs > maxino + 1) 417 numdirs = maxino + 1; 418 inplast = 0; 419 listmax = numdirs + 10; 420 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 421 sizeof(struct inoinfo *)); 422 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 423 sizeof(struct inoinfo *)); 424 if (inpsort == NULL || inphead == NULL) { 425 printf("cannot alloc %u bytes for inphead\n", 426 (unsigned)(numdirs * sizeof(struct inoinfo *))); 427 goto badsblabel; 428 } 429 cgrp = malloc(sblock->fs_cgsize); 430 if (cgrp == NULL) { 431 printf("cannot alloc %u bytes for cylinder group\n", 432 sblock->fs_cgsize); 433 goto badsblabel; 434 } 435 bufinit(); 436 if (sblock->fs_flags & FS_DOSOFTDEP) 437 usedsoftdep = 1; 438 else 439 usedsoftdep = 0; 440 return (1); 441 442 badsblabel: 443 markclean=0; 444 ckfini(); 445 return (0); 446 } 447 448 /* 449 * Read in the super block and its summary info. 450 */ 451 static int 452 readsb(listerr) 453 int listerr; 454 { 455 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 456 struct fs *fs; 457 458 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 459 return (0); 460 sblk.b_bno = super; 461 sblk.b_size = SBSIZE; 462 463 fs = sblk.b_un.b_fs; 464 /* auto detect byte order */ 465 if( fs->fs_magic == FS_MAGIC) { 466 if (endian == 0 || BYTE_ORDER == endian) { 467 needswap = 0; 468 doswap = do_blkswap = do_dirswap = 0; 469 } else { 470 needswap = 1; 471 doswap = do_blkswap = do_dirswap = 1; 472 } 473 } else if (fs->fs_magic == bswap32(FS_MAGIC)) { 474 if (endian == 0 || BYTE_ORDER != endian) { 475 needswap = 1; 476 doswap = do_blkswap = do_dirswap = 0; 477 } else { 478 needswap = 0; 479 doswap = do_blkswap = do_dirswap = 1; 480 } 481 } else { 482 badsb(listerr, "MAGIC NUMBER WRONG"); 483 return (0); 484 } 485 if (doswap) { 486 if (preen) 487 errx(EEXIT, "incompatible options -B and -p"); 488 if (nflag) 489 errx(EEXIT, "incompatible options -B and -n"); 490 if (endian == LITTLE_ENDIAN) { 491 if (!reply("CONVERT TO LITTLE ENDIAN")) 492 return 0; 493 } else if (endian == BIG_ENDIAN) { 494 if (!reply("CONVERT TO BIG ENDIAN")) 495 return 0; 496 } else 497 pfatal("INTERNAL ERROR: unknown endian"); 498 } 499 if (needswap) 500 printf("** Swapped byte order\n"); 501 /* swap SB byte order if asked */ 502 if (doswap) 503 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); 504 505 memmove(sblock, sblk.b_un.b_fs, SBSIZE); 506 if (needswap) 507 ffs_sb_swap(sblk.b_un.b_fs, sblock); 508 509 /* 510 * run a few consistency checks of the super block 511 */ 512 if (sblock->fs_ncg < 1) 513 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 514 if (sblock->fs_cpg < 1) 515 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 516 if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || 517 (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) 518 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 519 if (sblock->fs_sbsize > SBSIZE) 520 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 521 /* 522 * Compute block size that the filesystem is based on, 523 * according to fsbtodb, and adjust superblock block number 524 * so we can tell if this is an alternate later. 525 */ 526 super *= dev_bsize; 527 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 528 sblk.b_bno = super / dev_bsize; 529 530 if (bflag) { 531 havesb = 1; 532 return (1); 533 } 534 /* 535 * Set all possible fields that could differ, then do check 536 * of whole super block against an alternate super block. 537 * When an alternate super-block is specified this check is skipped. 538 */ 539 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); 540 if (asblk.b_errs) 541 return (0); 542 /* swap SB byte order if asked */ 543 if (doswap) 544 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); 545 546 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); 547 if (needswap) 548 ffs_sb_swap(asblk.b_un.b_fs, altsblock); 549 if (cmpsblks(sblock, altsblock)) { 550 if (debug) { 551 long *nlp, *olp, *endlp; 552 553 printf("superblock mismatches\n"); 554 nlp = (long *)altsblock; 555 olp = (long *)sblock; 556 endlp = olp + (sblock->fs_sbsize / sizeof *olp); 557 for ( ; olp < endlp; olp++, nlp++) { 558 if (*olp == *nlp) 559 continue; 560 printf("offset %ld, original %lx, alternate %lx\n", 561 (long)(olp - (long *)sblock), *olp, *nlp); 562 } 563 } 564 badsb(listerr, 565 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 566 return (0); 567 } 568 /* Now we know the SB is valid, we can write it back if needed */ 569 if (doswap) { 570 sbdirty(); 571 dirty(&asblk); 572 } 573 havesb = 1; 574 return (1); 575 } 576 577 int 578 cmpsblks(const struct fs *sb, struct fs *asb) 579 { 580 581 /* 582 * Copy fields which we don't care if they're different in the 583 * alternate superblocks, as they're either likely to be 584 * different because they're per-cylinder-group specific, or 585 * because they're transient details which are only maintained 586 * in the primary superblock. 587 */ 588 asb->fs_firstfield = sb->fs_firstfield; 589 asb->fs_unused_1 = sb->fs_unused_1; 590 asb->fs_time = sb->fs_time; 591 asb->fs_cstotal = sb->fs_cstotal; 592 asb->fs_cgrotor = sb->fs_cgrotor; 593 asb->fs_fmod = sb->fs_fmod; 594 asb->fs_clean = sb->fs_clean; 595 asb->fs_ronly = sb->fs_ronly; 596 asb->fs_flags = sb->fs_flags; 597 asb->fs_maxcontig = sb->fs_maxcontig; 598 asb->fs_minfree = sb->fs_minfree; 599 asb->fs_optim = sb->fs_optim; 600 asb->fs_rotdelay = sb->fs_rotdelay; 601 asb->fs_maxbpg = sb->fs_maxbpg; 602 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp); 603 asb->fs_contigdirs = sb->fs_contigdirs; 604 asb->fs_csp = sb->fs_csp; 605 asb->fs_maxcluster = sb->fs_maxcluster; 606 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); 607 memmove(asb->fs_snapinum, 608 sb->fs_snapinum, sizeof sb->fs_snapinum); 609 asb->fs_avgfilesize = sb->fs_avgfilesize; 610 asb->fs_avgfpdir = sb->fs_avgfpdir; 611 asb->fs_pendingblocks = sb->fs_pendingblocks; 612 asb->fs_pendinginodes = sb->fs_pendinginodes; 613 memmove(asb->fs_sparecon, 614 sb->fs_sparecon, sizeof sb->fs_sparecon); 615 /* 616 * The following should not have to be copied, but need to be. 617 */ 618 asb->fs_fsbtodb = sb->fs_fsbtodb; 619 asb->fs_interleave = sb->fs_interleave; 620 asb->fs_npsect = sb->fs_npsect; 621 asb->fs_nrpos = sb->fs_nrpos; 622 asb->fs_qbmask = sb->fs_qbmask; 623 asb->fs_qfmask = sb->fs_qfmask; 624 asb->fs_state = sb->fs_state; 625 asb->fs_maxfilesize = sb->fs_maxfilesize; 626 627 /* 628 * Compare the superblocks, effectively checking every other 629 * field to see if they differ. 630 */ 631 return (memcmp(sb, asb, (int)sb->fs_sbsize)); 632 } 633 634 static void 635 badsb(listerr, s) 636 int listerr; 637 char *s; 638 { 639 640 if (!listerr) 641 return; 642 if (preen) 643 printf("%s: ", cdevname()); 644 pfatal("BAD SUPER BLOCK: %s\n", s); 645 } 646 647 /* 648 * Calculate a prototype superblock based on information in the disk label. 649 * When done the cgsblock macro can be calculated and the fs_ncg field 650 * can be used. Do NOT attempt to use other macros without verifying that 651 * their needed information is available! 652 */ 653 static int 654 calcsb(dev, devfd, fs) 655 const char *dev; 656 int devfd; 657 struct fs *fs; 658 { 659 struct disklabel *lp; 660 struct partition *pp; 661 char *cp; 662 int i; 663 664 cp = strchr(dev, '\0') - 1; 665 if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'p')) && !isdigit(*cp)) { 666 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 667 return (0); 668 } 669 lp = getdisklabel(dev, devfd); 670 if (isdigit(*cp)) 671 pp = &lp->d_partitions[0]; 672 else 673 pp = &lp->d_partitions[*cp - 'a']; 674 if (pp->p_fstype != FS_BSDFFS) { 675 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 676 dev, pp->p_fstype < FSMAXTYPES ? 677 fstypenames[pp->p_fstype] : "unknown"); 678 return (0); 679 } 680 /* avoid divide by 0 */ 681 if (pp->p_fsize == 0 || pp->p_frag == 0) 682 return (0); 683 memset(fs, 0, sizeof(struct fs)); 684 fs->fs_fsize = pp->p_fsize; 685 fs->fs_frag = pp->p_frag; 686 fs->fs_cpg = pp->p_cpg; 687 fs->fs_size = pp->p_size; 688 fs->fs_ntrak = lp->d_ntracks; 689 fs->fs_nsect = lp->d_nsectors; 690 fs->fs_spc = lp->d_secpercyl; 691 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 692 fs->fs_sblkno = roundup( 693 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 694 fs->fs_frag); 695 fs->fs_cgmask = 0xffffffff; 696 for (i = fs->fs_ntrak; i > 1; i >>= 1) 697 fs->fs_cgmask <<= 1; 698 if (!POWEROF2(fs->fs_ntrak)) 699 fs->fs_cgmask <<= 1; 700 fs->fs_cgoffset = roundup( 701 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 702 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 703 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 704 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 705 fs->fs_fsbtodb++; 706 dev_bsize = lp->d_secsize; 707 return (1); 708 } 709 710 static struct disklabel * 711 getdisklabel(s, fd) 712 const char *s; 713 int fd; 714 { 715 static struct disklabel lab; 716 717 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 718 if (s == NULL) 719 return ((struct disklabel *)NULL); 720 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 721 errx(EEXIT, "%s: can't read disk label", s); 722 } 723 return (&lab); 724 } 725
Indexes created Fri Sep 26 20:09:58 GMT 2025