setup.c revision 41474
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 35static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 36#endif /* not lint */ 37 38#define DKTYPENAMES 39#include <sys/param.h> 40#include <sys/stat.h> 41#include <sys/ioctl.h> 42#include <sys/disklabel.h> 43#include <sys/file.h> 44 45#include <ufs/ufs/dinode.h> 46#include <ufs/ffs/fs.h> 47 48#include <ctype.h> 49#include <err.h> 50#include <errno.h> 51#include <string.h> 52 53#include "fsck.h" 54 55struct bufarea asblk; 56#define altsblock (*asblk.b_un.b_fs) 57#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 58 59static void badsb __P((int listerr, char *s)); 60static int calcsb __P((char *dev, int devfd, struct fs *fs)); 61static struct disklabel *getdisklabel __P((char *s, int fd)); 62static int readsb __P((int listerr)); 63 64/* 65 * Read in a superblock finding an alternate if necessary. 66 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 67 * is already clean (preen mode only). 68 */ 69int 70setup(dev) 71 char *dev; 72{ 73 long cg, size, asked, i, j; 74 long skipclean, bmapsize; 75 struct disklabel *lp; 76 off_t sizepb; 77 struct stat statb; 78 struct fs proto; 79 80 havesb = 0; 81 fswritefd = -1; 82 skipclean = fflag ? 0 : preen; 83 if (stat(dev, &statb) < 0) { 84 printf("Can't stat %s: %s\n", dev, strerror(errno)); 85 return (0); 86 } 87 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 88 pfatal("%s is not a character device", dev); 89 if (reply("CONTINUE") == 0) 90 return (0); 91 } 92 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 93 printf("Can't open %s: %s\n", dev, strerror(errno)); 94 return (0); 95 } 96 if (preen == 0) 97 printf("** %s", dev); 98 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 99 fswritefd = -1; 100 if (preen) 101 pfatal("NO WRITE ACCESS"); 102 printf(" (NO WRITE)"); 103 } 104 if (preen == 0) 105 printf("\n"); 106 fsmodified = 0; 107 lfdir = 0; 108 initbarea(&sblk); 109 initbarea(&asblk); 110 sblk.b_un.b_buf = malloc(SBSIZE); 111 asblk.b_un.b_buf = malloc(SBSIZE); 112 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 113 errx(EEXIT, "cannot allocate space for superblock"); 114 if ((lp = getdisklabel(NULL, fsreadfd))) 115 dev_bsize = secsize = lp->d_secsize; 116 else 117 dev_bsize = secsize = DEV_BSIZE; 118 /* 119 * Read in the superblock, looking for alternates if necessary 120 */ 121 if (readsb(1) == 0) { 122 skipclean = 0; 123 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 124 return(0); 125 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 126 return (0); 127 for (cg = 0; cg < proto.fs_ncg; cg++) { 128 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 129 if (readsb(0) != 0) 130 break; 131 } 132 if (cg >= proto.fs_ncg) { 133 printf("%s %s\n%s %s\n%s %s\n", 134 "SEARCH FOR ALTERNATE SUPER-BLOCK", 135 "FAILED. YOU MUST USE THE", 136 "-b OPTION TO FSCK TO SPECIFY THE", 137 "LOCATION OF AN ALTERNATE", 138 "SUPER-BLOCK TO SUPPLY NEEDED", 139 "INFORMATION; SEE fsck(8)."); 140 bflag = 0; 141 return(0); 142 } 143 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 144 bflag = 0; 145 } 146 if (skipclean && sblock.fs_clean) { 147 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 148 return (-1); 149 } 150 maxfsblock = sblock.fs_size; 151 maxino = sblock.fs_ncg * sblock.fs_ipg; 152 /* 153 * Check and potentially fix certain fields in the super block. 154 */ 155 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 156 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 157 if (reply("SET TO DEFAULT") == 1) { 158 sblock.fs_optim = FS_OPTTIME; 159 sbdirty(); 160 } 161 } 162 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 163 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 164 sblock.fs_minfree); 165 if (reply("SET TO DEFAULT") == 1) { 166 sblock.fs_minfree = 10; 167 sbdirty(); 168 } 169 } 170 if (sblock.fs_interleave < 1 || 171 sblock.fs_interleave > sblock.fs_nsect) { 172 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 173 sblock.fs_interleave); 174 sblock.fs_interleave = 1; 175 if (preen) 176 printf(" (FIXED)\n"); 177 if (preen || reply("SET TO DEFAULT") == 1) { 178 sbdirty(); 179 dirty(&asblk); 180 } 181 } 182 if (sblock.fs_npsect < sblock.fs_nsect || 183 sblock.fs_npsect > sblock.fs_nsect*2) { 184 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 185 sblock.fs_npsect); 186 sblock.fs_npsect = sblock.fs_nsect; 187 if (preen) 188 printf(" (FIXED)\n"); 189 if (preen || reply("SET TO DEFAULT") == 1) { 190 sbdirty(); 191 dirty(&asblk); 192 } 193 } 194 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 195 newinofmt = 1; 196 } else { 197 sblock.fs_qbmask = ~sblock.fs_bmask; 198 sblock.fs_qfmask = ~sblock.fs_fmask; 199 newinofmt = 0; 200 } 201 /* 202 * Convert to new inode format. 203 */ 204 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 205 if (preen) 206 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 207 else if (!reply("CONVERT TO NEW INODE FORMAT")) 208 return(0); 209 doinglevel2++; 210 sblock.fs_inodefmt = FS_44INODEFMT; 211 sizepb = sblock.fs_bsize; 212 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 213 for (i = 0; i < NIADDR; i++) { 214 sizepb *= NINDIR(&sblock); 215 sblock.fs_maxfilesize += sizepb; 216 } 217 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 218 sblock.fs_qbmask = ~sblock.fs_bmask; 219 sblock.fs_qfmask = ~sblock.fs_fmask; 220 sbdirty(); 221 dirty(&asblk); 222 } 223 /* 224 * Convert to new cylinder group format. 225 */ 226 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 227 if (preen) 228 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 229 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 230 return(0); 231 doinglevel1++; 232 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 233 sblock.fs_nrpos = 8; 234 sblock.fs_postbloff = 235 (char *)(&sblock.fs_opostbl[0][0]) - 236 (char *)(&sblock.fs_firstfield); 237 sblock.fs_rotbloff = &sblock.fs_space[0] - 238 (u_char *)(&sblock.fs_firstfield); 239 sblock.fs_cgsize = 240 fragroundup(&sblock, CGSIZE(&sblock)); 241 sbdirty(); 242 dirty(&asblk); 243 } 244 if (asblk.b_dirty && !bflag) { 245 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 246 flush(fswritefd, &asblk); 247 } 248 /* 249 * read in the summary info. 250 */ 251 asked = 0; 252 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 253 size = sblock.fs_cssize - i < sblock.fs_bsize ? 254 sblock.fs_cssize - i : sblock.fs_bsize; 255 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 256 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 257 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 258 size) != 0 && !asked) { 259 pfatal("BAD SUMMARY INFORMATION"); 260 if (reply("CONTINUE") == 0) { 261 ckfini(0); 262 exit(EEXIT); 263 } 264 asked++; 265 } 266 } 267 /* 268 * allocate and initialize the necessary maps 269 */ 270 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 271 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 272 if (blockmap == NULL) { 273 printf("cannot alloc %u bytes for blockmap\n", 274 (unsigned)bmapsize); 275 goto badsb; 276 } 277 inostathead = calloc((unsigned)(sblock.fs_ncg), 278 sizeof(struct inostatlist)); 279 if (inostathead == NULL) { 280 printf("cannot alloc %u bytes for inostathead\n", 281 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 282 goto badsb; 283 } 284 numdirs = sblock.fs_cstotal.cs_ndir; 285 if (numdirs == 0) { 286 printf("numdirs is zero, try using an alternate superblock\n"); 287 goto badsb; 288 } 289 inplast = 0; 290 listmax = numdirs + 10; 291 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 292 sizeof(struct inoinfo *)); 293 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 294 sizeof(struct inoinfo *)); 295 if (inpsort == NULL || inphead == NULL) { 296 printf("cannot alloc %u bytes for inphead\n", 297 (unsigned)numdirs * sizeof(struct inoinfo *)); 298 goto badsb; 299 } 300 bufinit(); 301 if (sblock.fs_flags & FS_DOSOFTDEP) 302 usedsoftdep = 1; 303 else 304 usedsoftdep = 0; 305 return (1); 306 307badsb: 308 ckfini(0); 309 return (0); 310} 311 312/* 313 * Read in the super block and its summary info. 314 */ 315static int 316readsb(listerr) 317 int listerr; 318{ 319 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 320 321 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 322 return (0); 323 sblk.b_bno = super; 324 sblk.b_size = SBSIZE; 325 /* 326 * run a few consistency checks of the super block 327 */ 328 if (sblock.fs_magic != FS_MAGIC) 329 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 330 if (sblock.fs_ncg < 1) 331 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 332 if (sblock.fs_cpg < 1) 333 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 334 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 335 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 336 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 337 if (sblock.fs_sbsize > SBSIZE) 338 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 339 /* 340 * Compute block size that the filesystem is based on, 341 * according to fsbtodb, and adjust superblock block number 342 * so we can tell if this is an alternate later. 343 */ 344 super *= dev_bsize; 345 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 346 sblk.b_bno = super / dev_bsize; 347 if (bflag) { 348 havesb = 1; 349 return (1); 350 } 351 /* 352 * Set all possible fields that could differ, then do check 353 * of whole super block against an alternate super block. 354 * When an alternate super-block is specified this check is skipped. 355 */ 356 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 357 if (asblk.b_errs) 358 return (0); 359 altsblock.fs_firstfield = sblock.fs_firstfield; 360 altsblock.fs_unused_1 = sblock.fs_unused_1; 361 altsblock.fs_time = sblock.fs_time; 362 altsblock.fs_cstotal = sblock.fs_cstotal; 363 altsblock.fs_cgrotor = sblock.fs_cgrotor; 364 altsblock.fs_fmod = sblock.fs_fmod; 365 altsblock.fs_clean = sblock.fs_clean; 366 altsblock.fs_ronly = sblock.fs_ronly; 367 altsblock.fs_flags = sblock.fs_flags; 368 altsblock.fs_maxcontig = sblock.fs_maxcontig; 369 altsblock.fs_minfree = sblock.fs_minfree; 370 altsblock.fs_optim = sblock.fs_optim; 371 altsblock.fs_rotdelay = sblock.fs_rotdelay; 372 altsblock.fs_maxbpg = sblock.fs_maxbpg; 373 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 374 altsblock.fs_maxcluster = sblock.fs_maxcluster; 375 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 376 memmove(altsblock.fs_sparecon, 377 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 378 /* 379 * The following should not have to be copied. 380 */ 381 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 382 altsblock.fs_interleave = sblock.fs_interleave; 383 altsblock.fs_npsect = sblock.fs_npsect; 384 altsblock.fs_nrpos = sblock.fs_nrpos; 385 altsblock.fs_state = sblock.fs_state; 386 altsblock.fs_qbmask = sblock.fs_qbmask; 387 altsblock.fs_qfmask = sblock.fs_qfmask; 388 altsblock.fs_state = sblock.fs_state; 389 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 390 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 391 if (debug) { 392 long *nlp, *olp, *endlp; 393 394 printf("superblock mismatches\n"); 395 nlp = (long *)&altsblock; 396 olp = (long *)&sblock; 397 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 398 for ( ; olp < endlp; olp++, nlp++) { 399 if (*olp == *nlp) 400 continue; 401 printf( 402 "offset %d, original %ld, alternate %ld\n", 403 olp - (long *)&sblock, *olp, *nlp); 404 } 405 } 406 badsb(listerr, 407 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 408 return (0); 409 } 410 havesb = 1; 411 return (1); 412} 413 414static void 415badsb(listerr, s) 416 int listerr; 417 char *s; 418{ 419 420 if (!listerr) 421 return; 422 if (preen) 423 printf("%s: ", cdevname); 424 pfatal("BAD SUPER BLOCK: %s\n", s); 425} 426 427/* 428 * Calculate a prototype superblock based on information in the disk label. 429 * When done the cgsblock macro can be calculated and the fs_ncg field 430 * can be used. Do NOT attempt to use other macros without verifying that 431 * their needed information is available! 432 */ 433static int 434calcsb(dev, devfd, fs) 435 char *dev; 436 int devfd; 437 register struct fs *fs; 438{ 439 register struct disklabel *lp; 440 register struct partition *pp; 441 register char *cp; 442 int i; 443 444 cp = strchr(dev, '\0') - 1; 445 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 446 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 447 return (0); 448 } 449 lp = getdisklabel(dev, devfd); 450 if (isdigit(*cp)) 451 pp = &lp->d_partitions[0]; 452 else 453 pp = &lp->d_partitions[*cp - 'a']; 454 if (pp->p_fstype != FS_BSDFFS) { 455 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 456 dev, pp->p_fstype < FSMAXTYPES ? 457 fstypenames[pp->p_fstype] : "unknown"); 458 return (0); 459 } 460 if (pp->p_fsize == 0 || pp->p_frag == 0 || 461 pp->p_cpg == 0 || pp->p_size == 0) { 462 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 463 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 464 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 465 return (0); 466 } 467 memset(fs, 0, sizeof(struct fs)); 468 fs->fs_fsize = pp->p_fsize; 469 fs->fs_frag = pp->p_frag; 470 fs->fs_cpg = pp->p_cpg; 471 fs->fs_size = pp->p_size; 472 fs->fs_ntrak = lp->d_ntracks; 473 fs->fs_nsect = lp->d_nsectors; 474 fs->fs_spc = lp->d_secpercyl; 475 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 476 fs->fs_sblkno = roundup( 477 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 478 fs->fs_frag); 479 fs->fs_cgmask = 0xffffffff; 480 for (i = fs->fs_ntrak; i > 1; i >>= 1) 481 fs->fs_cgmask <<= 1; 482 if (!POWEROF2(fs->fs_ntrak)) 483 fs->fs_cgmask <<= 1; 484 fs->fs_cgoffset = roundup( 485 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 486 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 487 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 488 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 489 fs->fs_fsbtodb++; 490 dev_bsize = lp->d_secsize; 491 return (1); 492} 493 494static struct disklabel * 495getdisklabel(s, fd) 496 char *s; 497 int fd; 498{ 499 static struct disklabel lab; 500 501 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 502 if (s == NULL) 503 return ((struct disklabel *)NULL); 504 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 505 errx(EEXIT, "%s: can't read disk label", s); 506 } 507 return (&lab); 508} 509