setup.c revision 53781
1/* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 37#endif 38static const char rcsid[] = 39 "$FreeBSD: head/sbin/fsck_ffs/setup.c 53781 1999-11-27 20:02:27Z phk $"; 40#endif /* not lint */ 41 42#define DKTYPENAMES 43#include <sys/param.h> 44#include <sys/stat.h> 45#include <sys/disklabel.h> 46#include <sys/file.h> 47 48#include <ufs/ufs/dinode.h> 49#include <ufs/ffs/fs.h> 50 51#include <ctype.h> 52#include <err.h> 53#include <errno.h> 54#include <string.h> 55 56#include "fsck.h" 57 58struct bufarea asblk; 59#define altsblock (*asblk.b_un.b_fs) 60#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 61 62static void badsb __P((int listerr, char *s)); 63static int calcsb __P((char *dev, int devfd, struct fs *fs)); 64static struct disklabel *getdisklabel __P((char *s, int fd)); 65static int readsb __P((int listerr)); 66 67/* 68 * Read in a superblock finding an alternate if necessary. 69 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 70 * is already clean (preen mode only). 71 */ 72int 73setup(dev) 74 char *dev; 75{ 76 long cg, size, asked, i, j; 77 long skipclean, bmapsize; 78 struct disklabel *lp; 79 off_t sizepb; 80 struct stat statb; 81 struct fs proto; 82 83 havesb = 0; 84 fswritefd = -1; 85 skipclean = fflag ? 0 : preen; 86 if (stat(dev, &statb) < 0) { 87 printf("Can't stat %s: %s\n", dev, strerror(errno)); 88 return (0); 89 } 90 if ((statb.st_mode & S_IFMT) != S_IFCHR && 91 (statb.st_mode & S_IFMT) != S_IFBLK) { 92 pfatal("%s is not a disk device", dev); 93 if (reply("CONTINUE") == 0) 94 return (0); 95 } 96 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 97 printf("Can't open %s: %s\n", dev, strerror(errno)); 98 return (0); 99 } 100 if (preen == 0) 101 printf("** %s", dev); 102 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 103 fswritefd = -1; 104 if (preen) 105 pfatal("NO WRITE ACCESS"); 106 printf(" (NO WRITE)"); 107 } 108 if (preen == 0) 109 printf("\n"); 110 fsmodified = 0; 111 lfdir = 0; 112 initbarea(&sblk); 113 initbarea(&asblk); 114 sblk.b_un.b_buf = malloc(SBSIZE); 115 asblk.b_un.b_buf = malloc(SBSIZE); 116 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 117 errx(EEXIT, "cannot allocate space for superblock"); 118 if ((lp = getdisklabel(NULL, fsreadfd))) 119 dev_bsize = secsize = lp->d_secsize; 120 else 121 dev_bsize = secsize = DEV_BSIZE; 122 /* 123 * Read in the superblock, looking for alternates if necessary 124 */ 125 if (readsb(1) == 0) { 126 skipclean = 0; 127 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 128 return(0); 129 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 130 return (0); 131 for (cg = 0; cg < proto.fs_ncg; cg++) { 132 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 133 if (readsb(0) != 0) 134 break; 135 } 136 if (cg >= proto.fs_ncg) { 137 printf("%s %s\n%s %s\n%s %s\n", 138 "SEARCH FOR ALTERNATE SUPER-BLOCK", 139 "FAILED. YOU MUST USE THE", 140 "-b OPTION TO FSCK TO SPECIFY THE", 141 "LOCATION OF AN ALTERNATE", 142 "SUPER-BLOCK TO SUPPLY NEEDED", 143 "INFORMATION; SEE fsck(8)."); 144 bflag = 0; 145 return(0); 146 } 147 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 148 bflag = 0; 149 } 150 if (skipclean && sblock.fs_clean) { 151 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 152 return (-1); 153 } 154 maxfsblock = sblock.fs_size; 155 maxino = sblock.fs_ncg * sblock.fs_ipg; 156 /* 157 * Check and potentially fix certain fields in the super block. 158 */ 159 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 160 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 161 if (reply("SET TO DEFAULT") == 1) { 162 sblock.fs_optim = FS_OPTTIME; 163 sbdirty(); 164 } 165 } 166 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 167 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 168 sblock.fs_minfree); 169 if (reply("SET TO DEFAULT") == 1) { 170 sblock.fs_minfree = 10; 171 sbdirty(); 172 } 173 } 174 if (sblock.fs_interleave < 1 || 175 sblock.fs_interleave > sblock.fs_nsect) { 176 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 177 sblock.fs_interleave); 178 sblock.fs_interleave = 1; 179 if (preen) 180 printf(" (FIXED)\n"); 181 if (preen || reply("SET TO DEFAULT") == 1) { 182 sbdirty(); 183 dirty(&asblk); 184 } 185 } 186 if (sblock.fs_npsect < sblock.fs_nsect || 187 sblock.fs_npsect > sblock.fs_nsect*2) { 188 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 189 sblock.fs_npsect); 190 sblock.fs_npsect = sblock.fs_nsect; 191 if (preen) 192 printf(" (FIXED)\n"); 193 if (preen || reply("SET TO DEFAULT") == 1) { 194 sbdirty(); 195 dirty(&asblk); 196 } 197 } 198 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 199 newinofmt = 1; 200 } else { 201 sblock.fs_qbmask = ~sblock.fs_bmask; 202 sblock.fs_qfmask = ~sblock.fs_fmask; 203 newinofmt = 0; 204 } 205 /* 206 * Convert to new inode format. 207 */ 208 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 209 if (preen) 210 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 211 else if (!reply("CONVERT TO NEW INODE FORMAT")) 212 return(0); 213 doinglevel2++; 214 sblock.fs_inodefmt = FS_44INODEFMT; 215 sizepb = sblock.fs_bsize; 216 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 217 for (i = 0; i < NIADDR; i++) { 218 sizepb *= NINDIR(&sblock); 219 sblock.fs_maxfilesize += sizepb; 220 } 221 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 222 sblock.fs_qbmask = ~sblock.fs_bmask; 223 sblock.fs_qfmask = ~sblock.fs_fmask; 224 sbdirty(); 225 dirty(&asblk); 226 } 227 /* 228 * Convert to new cylinder group format. 229 */ 230 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 231 if (preen) 232 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 233 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 234 return(0); 235 doinglevel1++; 236 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 237 sblock.fs_nrpos = 8; 238 sblock.fs_postbloff = 239 (char *)(&sblock.fs_opostbl[0][0]) - 240 (char *)(&sblock.fs_firstfield); 241 sblock.fs_rotbloff = &sblock.fs_space[0] - 242 (u_char *)(&sblock.fs_firstfield); 243 sblock.fs_cgsize = 244 fragroundup(&sblock, CGSIZE(&sblock)); 245 sbdirty(); 246 dirty(&asblk); 247 } 248 if (asblk.b_dirty && !bflag) { 249 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 250 flush(fswritefd, &asblk); 251 } 252 /* 253 * read in the summary info. 254 */ 255 asked = 0; 256 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 257 size = sblock.fs_cssize - i < sblock.fs_bsize ? 258 sblock.fs_cssize - i : sblock.fs_bsize; 259 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 260 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 261 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 262 size) != 0 && !asked) { 263 pfatal("BAD SUMMARY INFORMATION"); 264 if (reply("CONTINUE") == 0) { 265 ckfini(0); 266 exit(EEXIT); 267 } 268 asked++; 269 } 270 } 271 /* 272 * allocate and initialize the necessary maps 273 */ 274 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 275 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 276 if (blockmap == NULL) { 277 printf("cannot alloc %u bytes for blockmap\n", 278 (unsigned)bmapsize); 279 goto badsb; 280 } 281 inostathead = calloc((unsigned)(sblock.fs_ncg), 282 sizeof(struct inostatlist)); 283 if (inostathead == NULL) { 284 printf("cannot alloc %u bytes for inostathead\n", 285 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 286 goto badsb; 287 } 288 numdirs = sblock.fs_cstotal.cs_ndir; 289 if (numdirs == 0) { 290 printf("numdirs is zero, try using an alternate superblock\n"); 291 goto badsb; 292 } 293 inplast = 0; 294 listmax = numdirs + 10; 295 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 296 sizeof(struct inoinfo *)); 297 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 298 sizeof(struct inoinfo *)); 299 if (inpsort == NULL || inphead == NULL) { 300 printf("cannot alloc %u bytes for inphead\n", 301 (unsigned)numdirs * sizeof(struct inoinfo *)); 302 goto badsb; 303 } 304 bufinit(); 305 if (sblock.fs_flags & FS_DOSOFTDEP) 306 usedsoftdep = 1; 307 else 308 usedsoftdep = 0; 309 return (1); 310 311badsb: 312 ckfini(0); 313 return (0); 314} 315 316/* 317 * Read in the super block and its summary info. 318 */ 319static int 320readsb(listerr) 321 int listerr; 322{ 323 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 324 325 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 326 return (0); 327 sblk.b_bno = super; 328 sblk.b_size = SBSIZE; 329 /* 330 * run a few consistency checks of the super block 331 */ 332 if (sblock.fs_magic != FS_MAGIC) 333 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 334 if (sblock.fs_ncg < 1) 335 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 336 if (sblock.fs_cpg < 1) 337 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 338 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 339 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 340 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 341 if (sblock.fs_sbsize > SBSIZE) 342 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 343 /* 344 * Compute block size that the filesystem is based on, 345 * according to fsbtodb, and adjust superblock block number 346 * so we can tell if this is an alternate later. 347 */ 348 super *= dev_bsize; 349 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 350 sblk.b_bno = super / dev_bsize; 351 if (bflag) { 352 havesb = 1; 353 return (1); 354 } 355 /* 356 * Set all possible fields that could differ, then do check 357 * of whole super block against an alternate super block. 358 * When an alternate super-block is specified this check is skipped. 359 */ 360 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 361 if (asblk.b_errs) 362 return (0); 363 altsblock.fs_firstfield = sblock.fs_firstfield; 364 altsblock.fs_unused_1 = sblock.fs_unused_1; 365 altsblock.fs_time = sblock.fs_time; 366 altsblock.fs_cstotal = sblock.fs_cstotal; 367 altsblock.fs_cgrotor = sblock.fs_cgrotor; 368 altsblock.fs_fmod = sblock.fs_fmod; 369 altsblock.fs_clean = sblock.fs_clean; 370 altsblock.fs_ronly = sblock.fs_ronly; 371 altsblock.fs_flags = sblock.fs_flags; 372 altsblock.fs_maxcontig = sblock.fs_maxcontig; 373 altsblock.fs_minfree = sblock.fs_minfree; 374 altsblock.fs_optim = sblock.fs_optim; 375 altsblock.fs_rotdelay = sblock.fs_rotdelay; 376 altsblock.fs_maxbpg = sblock.fs_maxbpg; 377 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 378 altsblock.fs_maxcluster = sblock.fs_maxcluster; 379 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 380 memmove(altsblock.fs_sparecon, 381 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 382 /* 383 * The following should not have to be copied. 384 */ 385 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 386 altsblock.fs_interleave = sblock.fs_interleave; 387 altsblock.fs_npsect = sblock.fs_npsect; 388 altsblock.fs_nrpos = sblock.fs_nrpos; 389 altsblock.fs_state = sblock.fs_state; 390 altsblock.fs_qbmask = sblock.fs_qbmask; 391 altsblock.fs_qfmask = sblock.fs_qfmask; 392 altsblock.fs_state = sblock.fs_state; 393 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 394 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 395 if (debug) { 396 long *nlp, *olp, *endlp; 397 398 printf("superblock mismatches\n"); 399 nlp = (long *)&altsblock; 400 olp = (long *)&sblock; 401 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 402 for ( ; olp < endlp; olp++, nlp++) { 403 if (*olp == *nlp) 404 continue; 405 printf( 406 "offset %d, original %ld, alternate %ld\n", 407 olp - (long *)&sblock, *olp, *nlp); 408 } 409 } 410 badsb(listerr, 411 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 412 return (0); 413 } 414 havesb = 1; 415 return (1); 416} 417 418static void 419badsb(listerr, s) 420 int listerr; 421 char *s; 422{ 423 424 if (!listerr) 425 return; 426 if (preen) 427 printf("%s: ", cdevname); 428 pfatal("BAD SUPER BLOCK: %s\n", s); 429} 430 431/* 432 * Calculate a prototype superblock based on information in the disk label. 433 * When done the cgsblock macro can be calculated and the fs_ncg field 434 * can be used. Do NOT attempt to use other macros without verifying that 435 * their needed information is available! 436 */ 437static int 438calcsb(dev, devfd, fs) 439 char *dev; 440 int devfd; 441 register struct fs *fs; 442{ 443 register struct disklabel *lp; 444 register struct partition *pp; 445 register char *cp; 446 int i; 447 448 cp = strchr(dev, '\0') - 1; 449 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 450 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 451 return (0); 452 } 453 lp = getdisklabel(dev, devfd); 454 if (isdigit(*cp)) 455 pp = &lp->d_partitions[0]; 456 else 457 pp = &lp->d_partitions[*cp - 'a']; 458 if (pp->p_fstype != FS_BSDFFS) { 459 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 460 dev, pp->p_fstype < FSMAXTYPES ? 461 fstypenames[pp->p_fstype] : "unknown"); 462 return (0); 463 } 464 if (pp->p_fsize == 0 || pp->p_frag == 0 || 465 pp->p_cpg == 0 || pp->p_size == 0) { 466 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 467 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 468 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 469 return (0); 470 } 471 memset(fs, 0, sizeof(struct fs)); 472 fs->fs_fsize = pp->p_fsize; 473 fs->fs_frag = pp->p_frag; 474 fs->fs_cpg = pp->p_cpg; 475 fs->fs_size = pp->p_size; 476 fs->fs_ntrak = lp->d_ntracks; 477 fs->fs_nsect = lp->d_nsectors; 478 fs->fs_spc = lp->d_secpercyl; 479 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 480 fs->fs_sblkno = roundup( 481 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 482 fs->fs_frag); 483 fs->fs_cgmask = 0xffffffff; 484 for (i = fs->fs_ntrak; i > 1; i >>= 1) 485 fs->fs_cgmask <<= 1; 486 if (!POWEROF2(fs->fs_ntrak)) 487 fs->fs_cgmask <<= 1; 488 fs->fs_cgoffset = roundup( 489 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 490 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 491 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 492 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 493 fs->fs_fsbtodb++; 494 dev_bsize = lp->d_secsize; 495 return (1); 496} 497 498static struct disklabel * 499getdisklabel(s, fd) 500 char *s; 501 int fd; 502{ 503 static struct disklabel lab; 504 505 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 506 if (s == NULL) 507 return ((struct disklabel *)NULL); 508 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 509 errx(EEXIT, "%s: can't read disk label", s); 510 } 511 return (&lab); 512} 513