1 /* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 05/09/95"; 10 #endif /* not lint */ 11 12 #define DKTYPENAMES 13 #include <sys/param.h> 14 #include <sys/time.h> 15 #include <sys/stat.h> 16 #include <sys/ioctl.h> 17 #include <sys/disklabel.h> 18 #include <sys/file.h> 19 20 #include <ufs/ufs/dinode.h> 21 #include <ufs/ffs/fs.h> 22 23 #include <ctype.h> 24 #include <err.h> 25 #include <errno.h> 26 #include <string.h> 27 28 #include "fsck.h" 29 30 struct bufarea asblk; 31 #define altsblock (*asblk.b_un.b_fs) 32 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 33 34 static void badsb __P((int listerr, char *s)); 35 static int calcsb __P((char *dev, int devfd, struct fs *fs)); 36 static struct disklabel *getdisklabel __P((char *s, int fd)); 37 static int readsb __P((int listerr)); 38 39 /* 40 * Read in a superblock finding an alternate if necessary. 41 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 42 * is already clean (preen mode only). 43 */ 44 int 45 setup(dev) 46 char *dev; 47 { 48 long cg, size, asked, i, j; 49 long skipclean, bmapsize; 50 struct disklabel *lp; 51 off_t sizepb; 52 struct stat statb; 53 struct fs proto; 54 55 havesb = 0; 56 fswritefd = -1; 57 skipclean = preen; 58 if (stat(dev, &statb) < 0) { 59 printf("Can't stat %s: %s\n", dev, strerror(errno)); 60 return (0); 61 } 62 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 63 pfatal("%s is not a character device", dev); 64 if (reply("CONTINUE") == 0) 65 return (0); 66 } 67 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 68 printf("Can't open %s: %s\n", dev, strerror(errno)); 69 return (0); 70 } 71 if (preen == 0) 72 printf("** %s", dev); 73 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 74 fswritefd = -1; 75 if (preen) 76 pfatal("NO WRITE ACCESS"); 77 printf(" (NO WRITE)"); 78 } 79 if (preen == 0) 80 printf("\n"); 81 fsmodified = 0; 82 lfdir = 0; 83 initbarea(&sblk); 84 initbarea(&asblk); 85 sblk.b_un.b_buf = malloc(SBSIZE); 86 asblk.b_un.b_buf = malloc(SBSIZE); 87 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 88 errx(EEXIT, "cannot allocate space for superblock"); 89 if (lp = getdisklabel(NULL, fsreadfd)) 90 dev_bsize = secsize = lp->d_secsize; 91 else 92 dev_bsize = secsize = DEV_BSIZE; 93 /* 94 * Read in the superblock, looking for alternates if necessary 95 */ 96 if (readsb(1) == 0) { 97 skipclean = 0; 98 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 99 return(0); 100 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 101 return (0); 102 for (cg = 0; cg < proto.fs_ncg; cg++) { 103 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 104 if (readsb(0) != 0) 105 break; 106 } 107 if (cg >= proto.fs_ncg) { 108 printf("%s %s\n%s %s\n%s %s\n", 109 "SEARCH FOR ALTERNATE SUPER-BLOCK", 110 "FAILED. YOU MUST USE THE", 111 "-b OPTION TO FSCK TO SPECIFY THE", 112 "LOCATION OF AN ALTERNATE", 113 "SUPER-BLOCK TO SUPPLY NEEDED", 114 "INFORMATION; SEE fsck(8)."); 115 return(0); 116 } 117 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 118 } 119 if (skipclean && sblock.fs_clean) { 120 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 121 return (-1); 122 } 123 maxfsblock = sblock.fs_size; 124 maxino = sblock.fs_ncg * sblock.fs_ipg; 125 /* 126 * Check and potentially fix certain fields in the super block. 127 */ 128 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 129 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 130 if (reply("SET TO DEFAULT") == 1) { 131 sblock.fs_optim = FS_OPTTIME; 132 sbdirty(); 133 } 134 } 135 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 136 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 137 sblock.fs_minfree); 138 if (reply("SET TO DEFAULT") == 1) { 139 sblock.fs_minfree = 10; 140 sbdirty(); 141 } 142 } 143 if (sblock.fs_interleave < 1 || 144 sblock.fs_interleave > sblock.fs_nsect) { 145 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 146 sblock.fs_interleave); 147 sblock.fs_interleave = 1; 148 if (preen) 149 printf(" (FIXED)\n"); 150 if (preen || reply("SET TO DEFAULT") == 1) { 151 sbdirty(); 152 dirty(&asblk); 153 } 154 } 155 if (sblock.fs_npsect < sblock.fs_nsect || 156 sblock.fs_npsect > sblock.fs_nsect*2) { 157 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 158 sblock.fs_npsect); 159 sblock.fs_npsect = sblock.fs_nsect; 160 if (preen) 161 printf(" (FIXED)\n"); 162 if (preen || reply("SET TO DEFAULT") == 1) { 163 sbdirty(); 164 dirty(&asblk); 165 } 166 } 167 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 168 newinofmt = 1; 169 } else { 170 sblock.fs_qbmask = ~sblock.fs_bmask; 171 sblock.fs_qfmask = ~sblock.fs_fmask; 172 newinofmt = 0; 173 } 174 /* 175 * Convert to new inode format. 176 */ 177 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 178 if (preen) 179 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 180 else if (!reply("CONVERT TO NEW INODE FORMAT")) 181 return(0); 182 doinglevel2++; 183 sblock.fs_inodefmt = FS_44INODEFMT; 184 sizepb = sblock.fs_bsize; 185 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 186 for (i = 0; i < NIADDR; i++) { 187 sizepb *= NINDIR(&sblock); 188 sblock.fs_maxfilesize += sizepb; 189 } 190 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 191 sblock.fs_qbmask = ~sblock.fs_bmask; 192 sblock.fs_qfmask = ~sblock.fs_fmask; 193 sbdirty(); 194 dirty(&asblk); 195 } 196 /* 197 * Convert to new cylinder group format. 198 */ 199 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 200 if (preen) 201 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 202 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 203 return(0); 204 doinglevel1++; 205 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 206 sblock.fs_nrpos = 8; 207 sblock.fs_postbloff = 208 (char *)(&sblock.fs_opostbl[0][0]) - 209 (char *)(&sblock.fs_firstfield); 210 sblock.fs_rotbloff = &sblock.fs_space[0] - 211 (u_char *)(&sblock.fs_firstfield); 212 sblock.fs_cgsize = 213 fragroundup(&sblock, CGSIZE(&sblock)); 214 sbdirty(); 215 dirty(&asblk); 216 } 217 if (asblk.b_dirty && !bflag) { 218 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 219 flush(fswritefd, &asblk); 220 } 221 /* 222 * read in the summary info. 223 */ 224 asked = 0; 225 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 226 size = sblock.fs_cssize - i < sblock.fs_bsize ? 227 sblock.fs_cssize - i : sblock.fs_bsize; 228 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 229 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 230 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 231 size) != 0 && !asked) { 232 pfatal("BAD SUMMARY INFORMATION"); 233 if (reply("CONTINUE") == 0) 234 exit(EEXIT); 235 asked++; 236 } 237 } 238 /* 239 * allocate and initialize the necessary maps 240 */ 241 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 242 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 243 if (blockmap == NULL) { 244 printf("cannot alloc %u bytes for blockmap\n", 245 (unsigned)bmapsize); 246 goto badsb; 247 } 248 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 249 if (statemap == NULL) { 250 printf("cannot alloc %u bytes for statemap\n", 251 (unsigned)(maxino + 1)); 252 goto badsb; 253 } 254 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 255 if (typemap == NULL) { 256 printf("cannot alloc %u bytes for typemap\n", 257 (unsigned)(maxino + 1)); 258 goto badsb; 259 } 260 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 261 if (lncntp == NULL) { 262 printf("cannot alloc %u bytes for lncntp\n", 263 (unsigned)(maxino + 1) * sizeof(short)); 264 goto badsb; 265 } 266 numdirs = sblock.fs_cstotal.cs_ndir; 267 inplast = 0; 268 listmax = numdirs + 10; 269 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 270 sizeof(struct inoinfo *)); 271 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 272 sizeof(struct inoinfo *)); 273 if (inpsort == NULL || inphead == NULL) { 274 printf("cannot alloc %u bytes for inphead\n", 275 (unsigned)numdirs * sizeof(struct inoinfo *)); 276 goto badsb; 277 } 278 bufinit(); 279 return (1); 280 281 badsb: 282 ckfini(0); 283 return (0); 284 } 285 286 /* 287 * Read in the super block and its summary info. 288 */ 289 static int 290 readsb(listerr) 291 int listerr; 292 { 293 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 294 295 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 296 return (0); 297 sblk.b_bno = super; 298 sblk.b_size = SBSIZE; 299 /* 300 * run a few consistency checks of the super block 301 */ 302 if (sblock.fs_magic != FS_MAGIC) 303 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 304 if (sblock.fs_ncg < 1) 305 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 306 if (sblock.fs_cpg < 1) 307 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 308 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 309 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 310 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 311 if (sblock.fs_sbsize > SBSIZE) 312 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 313 /* 314 * Compute block size that the filesystem is based on, 315 * according to fsbtodb, and adjust superblock block number 316 * so we can tell if this is an alternate later. 317 */ 318 super *= dev_bsize; 319 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 320 sblk.b_bno = super / dev_bsize; 321 if (bflag) { 322 havesb = 1; 323 return (1); 324 } 325 /* 326 * Set all possible fields that could differ, then do check 327 * of whole super block against an alternate super block. 328 * When an alternate super-block is specified this check is skipped. 329 */ 330 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 331 if (asblk.b_errs) 332 return (0); 333 altsblock.fs_firstfield = sblock.fs_firstfield; 334 altsblock.fs_unused_1 = sblock.fs_unused_1; 335 altsblock.fs_time = sblock.fs_time; 336 altsblock.fs_cstotal = sblock.fs_cstotal; 337 altsblock.fs_cgrotor = sblock.fs_cgrotor; 338 altsblock.fs_fmod = sblock.fs_fmod; 339 altsblock.fs_clean = sblock.fs_clean; 340 altsblock.fs_ronly = sblock.fs_ronly; 341 altsblock.fs_flags = sblock.fs_flags; 342 altsblock.fs_maxcontig = sblock.fs_maxcontig; 343 altsblock.fs_minfree = sblock.fs_minfree; 344 altsblock.fs_optim = sblock.fs_optim; 345 altsblock.fs_rotdelay = sblock.fs_rotdelay; 346 altsblock.fs_maxbpg = sblock.fs_maxbpg; 347 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 348 altsblock.fs_maxcluster = sblock.fs_maxcluster; 349 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 350 memmove(altsblock.fs_sparecon, 351 sblock.fs_sparecon, sizeof sblock.fs_sparecon); 352 /* 353 * The following should not have to be copied. 354 */ 355 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 356 altsblock.fs_interleave = sblock.fs_interleave; 357 altsblock.fs_npsect = sblock.fs_npsect; 358 altsblock.fs_nrpos = sblock.fs_nrpos; 359 altsblock.fs_state = sblock.fs_state; 360 altsblock.fs_qbmask = sblock.fs_qbmask; 361 altsblock.fs_qfmask = sblock.fs_qfmask; 362 altsblock.fs_state = sblock.fs_state; 363 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 364 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 365 if (debug) { 366 long *nlp, *olp, *endlp; 367 368 printf("superblock mismatches\n"); 369 nlp = (long *)&altsblock; 370 olp = (long *)&sblock; 371 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 372 for ( ; olp < endlp; olp++, nlp++) { 373 if (*olp == *nlp) 374 continue; 375 printf("offset %d, original %d, alternate %d\n", 376 olp - (long *)&sblock, *olp, *nlp); 377 } 378 } 379 badsb(listerr, 380 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 381 return (0); 382 } 383 havesb = 1; 384 return (1); 385 } 386 387 static void 388 badsb(listerr, s) 389 int listerr; 390 char *s; 391 { 392 393 if (!listerr) 394 return; 395 if (preen) 396 printf("%s: ", cdevname); 397 pfatal("BAD SUPER BLOCK: %s\n", s); 398 } 399 400 /* 401 * Calculate a prototype superblock based on information in the disk label. 402 * When done the cgsblock macro can be calculated and the fs_ncg field 403 * can be used. Do NOT attempt to use other macros without verifying that 404 * their needed information is available! 405 */ 406 static int 407 calcsb(dev, devfd, fs) 408 char *dev; 409 int devfd; 410 register struct fs *fs; 411 { 412 register struct disklabel *lp; 413 register struct partition *pp; 414 register char *cp; 415 int i; 416 417 cp = strchr(dev, '\0') - 1; 418 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 419 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 420 return (0); 421 } 422 lp = getdisklabel(dev, devfd); 423 if (isdigit(*cp)) 424 pp = &lp->d_partitions[0]; 425 else 426 pp = &lp->d_partitions[*cp - 'a']; 427 if (pp->p_fstype != FS_BSDFFS) { 428 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 429 dev, pp->p_fstype < FSMAXTYPES ? 430 fstypenames[pp->p_fstype] : "unknown"); 431 return (0); 432 } 433 memset(fs, 0, sizeof(struct fs)); 434 fs->fs_fsize = pp->p_fsize; 435 fs->fs_frag = pp->p_frag; 436 fs->fs_cpg = pp->p_cpg; 437 fs->fs_size = pp->p_size; 438 fs->fs_ntrak = lp->d_ntracks; 439 fs->fs_nsect = lp->d_nsectors; 440 fs->fs_spc = lp->d_secpercyl; 441 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 442 fs->fs_sblkno = roundup( 443 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 444 fs->fs_frag); 445 fs->fs_cgmask = 0xffffffff; 446 for (i = fs->fs_ntrak; i > 1; i >>= 1) 447 fs->fs_cgmask <<= 1; 448 if (!POWEROF2(fs->fs_ntrak)) 449 fs->fs_cgmask <<= 1; 450 fs->fs_cgoffset = roundup( 451 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 452 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 453 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 454 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 455 fs->fs_fsbtodb++; 456 dev_bsize = lp->d_secsize; 457 return (1); 458 } 459 460 static struct disklabel * 461 getdisklabel(s, fd) 462 char *s; 463 int fd; 464 { 465 static struct disklabel lab; 466 467 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 468 if (s == NULL) 469 return ((struct disklabel *)NULL); 470 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 471 errx(EEXIT, "%s: can't read disk label", s); 472 } 473 return (&lab); 474 } 475