1 /* 2 * Copyright (c) 1980, 1986 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)setup.c 5.28 (Berkeley) 05/05/90"; 20 #endif /* not lint */ 21 22 #define DKTYPENAMES 23 #include <sys/param.h> 24 #include <ufs/dinode.h> 25 #include <ufs/fs.h> 26 #include <sys/stat.h> 27 #include <sys/ioctl.h> 28 #include <sys/disklabel.h> 29 #include <sys/file.h> 30 #include <machine/endian.h> 31 #include <ctype.h> 32 #include "fsck.h" 33 34 struct bufarea asblk; 35 #define altsblock (*asblk.b_un.b_fs) 36 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 37 38 /* 39 * The size of a cylinder group is calculated by CGSIZE. The maximum size 40 * is limited by the fact that cylinder groups are at most one block. 41 * Its size is derived from the size of the maps maintained in the 42 * cylinder group and the (struct cg) size. 43 */ 44 #define CGSIZE(fs) \ 45 /* base cg */ (sizeof(struct cg) + \ 46 /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ 47 /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ 48 /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ 49 /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) 50 51 char *malloc(), *calloc(); 52 char *index(); 53 struct disklabel *getdisklabel(); 54 55 setup(dev) 56 char *dev; 57 { 58 long cg, size, asked, i, j; 59 long bmapsize; 60 struct disklabel *lp; 61 struct stat statb; 62 struct fs proto; 63 64 havesb = 0; 65 if (stat(dev, &statb) < 0) { 66 perror(dev); 67 printf("Can't stat %s\n", dev); 68 return (0); 69 } 70 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 71 pfatal("%s is not a character device", dev); 72 if (reply("CONTINUE") == 0) 73 return (0); 74 } 75 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 76 perror(dev); 77 printf("Can't open %s\n", dev); 78 return (0); 79 } 80 if (preen == 0) 81 printf("** %s", dev); 82 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 83 fswritefd = -1; 84 if (preen) 85 pfatal("NO WRITE ACCESS"); 86 printf(" (NO WRITE)"); 87 } 88 if (preen == 0) 89 printf("\n"); 90 fsmodified = 0; 91 lfdir = 0; 92 initbarea(&sblk); 93 initbarea(&asblk); 94 sblk.b_un.b_buf = malloc(SBSIZE); 95 asblk.b_un.b_buf = malloc(SBSIZE); 96 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 97 errexit("cannot allocate space for superblock\n"); 98 if (lp = getdisklabel((char *)NULL, fsreadfd)) 99 dev_bsize = secsize = lp->d_secsize; 100 else 101 dev_bsize = secsize = DEV_BSIZE; 102 /* 103 * Read in the superblock, looking for alternates if necessary 104 */ 105 if (readsb(1) == 0) { 106 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 107 return(0); 108 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 109 return (0); 110 for (cg = 0; cg < proto.fs_ncg; cg++) { 111 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 112 if (readsb(0) != 0) 113 break; 114 } 115 if (cg >= proto.fs_ncg) { 116 printf("%s %s\n%s %s\n%s %s\n", 117 "SEARCH FOR ALTERNATE SUPER-BLOCK", 118 "FAILED. YOU MUST USE THE", 119 "-b OPTION TO FSCK TO SPECIFY THE", 120 "LOCATION OF AN ALTERNATE", 121 "SUPER-BLOCK TO SUPPLY NEEDED", 122 "INFORMATION; SEE fsck(8)."); 123 return(0); 124 } 125 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 126 } 127 maxfsblock = sblock.fs_size; 128 maxino = sblock.fs_ncg * sblock.fs_ipg; 129 /* 130 * Check and potentially fix certain fields in the super block. 131 */ 132 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 133 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 134 if (reply("SET TO DEFAULT") == 1) { 135 sblock.fs_optim = FS_OPTTIME; 136 sbdirty(); 137 } 138 } 139 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 140 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 141 sblock.fs_minfree); 142 if (reply("SET TO DEFAULT") == 1) { 143 sblock.fs_minfree = 10; 144 sbdirty(); 145 } 146 } 147 if (sblock.fs_interleave < 1) { 148 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 149 sblock.fs_interleave); 150 sblock.fs_interleave = 1; 151 if (preen) 152 printf(" (FIXED)\n"); 153 if (preen || reply("SET TO DEFAULT") == 1) { 154 sbdirty(); 155 dirty(&asblk); 156 } 157 } 158 if (sblock.fs_npsect < sblock.fs_nsect) { 159 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 160 sblock.fs_npsect); 161 sblock.fs_npsect = sblock.fs_nsect; 162 if (preen) 163 printf(" (FIXED)\n"); 164 if (preen || reply("SET TO DEFAULT") == 1) { 165 sbdirty(); 166 dirty(&asblk); 167 } 168 } 169 if (cvtflag) { 170 if (sblock.fs_postblformat == FS_42POSTBLFMT) { 171 /* 172 * Requested to convert from old format to new format 173 */ 174 if (preen) 175 pwarn("CONVERTING TO NEW FILE SYSTEM FORMAT\n"); 176 else if (!reply("CONVERT TO NEW FILE SYSTEM FORMAT")) 177 return(0); 178 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 179 sblock.fs_nrpos = 8; 180 sblock.fs_postbloff = 181 (char *)(&sblock.fs_opostbl[0][0]) - 182 (char *)(&sblock.fs_link); 183 sblock.fs_rotbloff = &sblock.fs_space[0] - 184 (u_char *)(&sblock.fs_link); 185 sblock.fs_cgsize = 186 fragroundup(&sblock, CGSIZE(&sblock)); 187 /* 188 * Planning now for future expansion. 189 */ 190 # if (BYTE_ORDER == BIG_ENDIAN) 191 sblock.fs_qbmask.val[0] = 0; 192 sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; 193 sblock.fs_qfmask.val[0] = 0; 194 sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; 195 # endif /* BIG_ENDIAN */ 196 # if (BYTE_ORDER == LITTLE_ENDIAN) 197 sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; 198 sblock.fs_qbmask.val[1] = 0; 199 sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; 200 sblock.fs_qfmask.val[1] = 0; 201 # endif /* LITTLE_ENDIAN */ 202 sbdirty(); 203 dirty(&asblk); 204 } else if (sblock.fs_postblformat == FS_DYNAMICPOSTBLFMT) { 205 /* 206 * Requested to convert from new format to old format 207 */ 208 if (sblock.fs_nrpos != 8 || sblock.fs_ipg > 2048 || 209 sblock.fs_cpg > 32 || sblock.fs_cpc > 16) { 210 printf( 211 "PARAMETERS OF CURRENT FILE SYSTEM DO NOT\n\t"); 212 errexit( 213 "ALLOW CONVERSION TO OLD FILE SYSTEM FORMAT\n"); 214 } 215 if (preen) 216 pwarn("CONVERTING TO OLD FILE SYSTEM FORMAT\n"); 217 else if (!reply("CONVERT TO OLD FILE SYSTEM FORMAT")) 218 return(0); 219 sblock.fs_postblformat = FS_42POSTBLFMT; 220 sblock.fs_cgsize = fragroundup(&sblock, 221 sizeof(struct ocg) + howmany(sblock.fs_fpg, NBBY)); 222 sbdirty(); 223 dirty(&asblk); 224 } else { 225 errexit("UNKNOWN FILE SYSTEM FORMAT\n"); 226 } 227 } 228 if (asblk.b_dirty) { 229 bcopy((char *)&sblock, (char *)&altsblock, 230 (int)sblock.fs_sbsize); 231 flush(fswritefd, &asblk); 232 } 233 /* 234 * read in the summary info. 235 */ 236 asked = 0; 237 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 238 size = sblock.fs_cssize - i < sblock.fs_bsize ? 239 sblock.fs_cssize - i : sblock.fs_bsize; 240 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 241 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 242 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 243 size) != 0 && !asked) { 244 pfatal("BAD SUMMARY INFORMATION"); 245 if (reply("CONTINUE") == 0) 246 errexit(""); 247 asked++; 248 } 249 } 250 /* 251 * allocate and initialize the necessary maps 252 */ 253 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 254 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 255 if (blockmap == NULL) { 256 printf("cannot alloc %d bytes for blockmap\n", bmapsize); 257 goto badsb; 258 } 259 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 260 if (statemap == NULL) { 261 printf("cannot alloc %d bytes for statemap\n", maxino + 1); 262 goto badsb; 263 } 264 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 265 if (lncntp == NULL) { 266 printf("cannot alloc %d bytes for lncntp\n", 267 (maxino + 1) * sizeof(short)); 268 goto badsb; 269 } 270 numdirs = sblock.fs_cstotal.cs_ndir; 271 inplast = 0; 272 listmax = numdirs + 10; 273 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 274 sizeof(struct inoinfo *)); 275 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 276 sizeof(struct inoinfo *)); 277 if (inpsort == NULL || inphead == NULL) { 278 printf("cannot alloc %d bytes for inphead\n", 279 numdirs * sizeof(struct inoinfo *)); 280 goto badsb; 281 } 282 bufinit(); 283 return (1); 284 285 badsb: 286 ckfini(); 287 return (0); 288 } 289 290 /* 291 * Read in the super block and its summary info. 292 */ 293 readsb(listerr) 294 int listerr; 295 { 296 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 297 298 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 299 return (0); 300 sblk.b_bno = super; 301 sblk.b_size = SBSIZE; 302 /* 303 * run a few consistency checks of the super block 304 */ 305 if (sblock.fs_magic != FS_MAGIC) 306 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 307 if (sblock.fs_ncg < 1) 308 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 309 if (sblock.fs_cpg < 1) 310 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 311 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 312 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 313 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 314 if (sblock.fs_sbsize > SBSIZE) 315 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 316 /* 317 * Compute block size that the filesystem is based on, 318 * according to fsbtodb, and adjust superblock block number 319 * so we can tell if this is an alternate later. 320 */ 321 super *= dev_bsize; 322 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 323 sblk.b_bno = super / dev_bsize; 324 /* 325 * Set all possible fields that could differ, then do check 326 * of whole super block against an alternate super block. 327 * When an alternate super-block is specified this check is skipped. 328 */ 329 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 330 if (asblk.b_errs) 331 return (0); 332 if (bflag) { 333 havesb = 1; 334 return (1); 335 } 336 altsblock.fs_link = sblock.fs_link; 337 altsblock.fs_rlink = sblock.fs_rlink; 338 altsblock.fs_time = sblock.fs_time; 339 altsblock.fs_cstotal = sblock.fs_cstotal; 340 altsblock.fs_cgrotor = sblock.fs_cgrotor; 341 altsblock.fs_fmod = sblock.fs_fmod; 342 altsblock.fs_clean = sblock.fs_clean; 343 altsblock.fs_ronly = sblock.fs_ronly; 344 altsblock.fs_flags = sblock.fs_flags; 345 altsblock.fs_maxcontig = sblock.fs_maxcontig; 346 altsblock.fs_minfree = sblock.fs_minfree; 347 altsblock.fs_optim = sblock.fs_optim; 348 altsblock.fs_rotdelay = sblock.fs_rotdelay; 349 altsblock.fs_maxbpg = sblock.fs_maxbpg; 350 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 351 sizeof sblock.fs_csp); 352 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 353 sizeof sblock.fs_fsmnt); 354 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 355 sizeof sblock.fs_sparecon); 356 /* 357 * The following should not have to be copied. 358 */ 359 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 360 altsblock.fs_interleave = sblock.fs_interleave; 361 altsblock.fs_npsect = sblock.fs_npsect; 362 altsblock.fs_nrpos = sblock.fs_nrpos; 363 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 364 badsb(listerr, 365 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 366 return (0); 367 } 368 havesb = 1; 369 return (1); 370 } 371 372 badsb(listerr, s) 373 int listerr; 374 char *s; 375 { 376 377 if (!listerr) 378 return; 379 if (preen) 380 printf("%s: ", devname); 381 pfatal("BAD SUPER BLOCK: %s\n", s); 382 } 383 384 /* 385 * Calculate a prototype superblock based on information in the disk label. 386 * When done the cgsblock macro can be calculated and the fs_ncg field 387 * can be used. Do NOT attempt to use other macros without verifying that 388 * their needed information is available! 389 */ 390 calcsb(dev, devfd, fs) 391 char *dev; 392 int devfd; 393 register struct fs *fs; 394 { 395 register struct disklabel *lp; 396 register struct partition *pp; 397 register char *cp; 398 int i; 399 400 cp = index(dev, '\0') - 1; 401 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 402 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 403 return (0); 404 } 405 lp = getdisklabel(dev, devfd); 406 if (isdigit(*cp)) 407 pp = &lp->d_partitions[0]; 408 else 409 pp = &lp->d_partitions[*cp - 'a']; 410 if (pp->p_fstype != FS_BSDFFS) { 411 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 412 dev, pp->p_fstype < FSMAXTYPES ? 413 fstypenames[pp->p_fstype] : "unknown"); 414 return (0); 415 } 416 bzero((char *)fs, sizeof(struct fs)); 417 fs->fs_fsize = pp->p_fsize; 418 fs->fs_frag = pp->p_frag; 419 fs->fs_cpg = pp->p_cpg; 420 fs->fs_size = pp->p_size; 421 fs->fs_ntrak = lp->d_ntracks; 422 fs->fs_nsect = lp->d_nsectors; 423 fs->fs_spc = lp->d_secpercyl; 424 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 425 fs->fs_sblkno = roundup( 426 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 427 fs->fs_frag); 428 fs->fs_cgmask = 0xffffffff; 429 for (i = fs->fs_ntrak; i > 1; i >>= 1) 430 fs->fs_cgmask <<= 1; 431 if (!POWEROF2(fs->fs_ntrak)) 432 fs->fs_cgmask <<= 1; 433 fs->fs_cgoffset = roundup( 434 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 435 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 436 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 437 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 438 fs->fs_fsbtodb++; 439 dev_bsize = lp->d_secsize; 440 return (1); 441 } 442 443 struct disklabel * 444 getdisklabel(s, fd) 445 char *s; 446 int fd; 447 { 448 static struct disklabel lab; 449 450 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 451 if (s == NULL) 452 return ((struct disklabel *)NULL); 453 pwarn(""); 454 perror("ioctl (GDINFO)"); 455 errexit("%s: can't read disk label", s); 456 } 457 return (&lab); 458 } 459