1 /* 2 * Copyright (c) 1980, 1986 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)setup.c 5.29 (Berkeley) 06/01/90"; 10 #endif /* not lint */ 11 12 #define DKTYPENAMES 13 #include <sys/param.h> 14 #include <ufs/dinode.h> 15 #include <ufs/fs.h> 16 #include <sys/stat.h> 17 #include <sys/ioctl.h> 18 #include <sys/disklabel.h> 19 #include <sys/file.h> 20 #include <machine/endian.h> 21 #include <ctype.h> 22 #include "fsck.h" 23 24 struct bufarea asblk; 25 #define altsblock (*asblk.b_un.b_fs) 26 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 27 28 /* 29 * The size of a cylinder group is calculated by CGSIZE. The maximum size 30 * is limited by the fact that cylinder groups are at most one block. 31 * Its size is derived from the size of the maps maintained in the 32 * cylinder group and the (struct cg) size. 33 */ 34 #define CGSIZE(fs) \ 35 /* base cg */ (sizeof(struct cg) + \ 36 /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ 37 /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ 38 /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ 39 /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) 40 41 char *malloc(), *calloc(); 42 char *index(); 43 struct disklabel *getdisklabel(); 44 45 setup(dev) 46 char *dev; 47 { 48 long cg, size, asked, i, j; 49 long bmapsize; 50 struct disklabel *lp; 51 struct stat statb; 52 struct fs proto; 53 54 havesb = 0; 55 if (stat(dev, &statb) < 0) { 56 perror(dev); 57 printf("Can't stat %s\n", dev); 58 return (0); 59 } 60 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 61 pfatal("%s is not a character device", dev); 62 if (reply("CONTINUE") == 0) 63 return (0); 64 } 65 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 66 perror(dev); 67 printf("Can't open %s\n", dev); 68 return (0); 69 } 70 if (preen == 0) 71 printf("** %s", dev); 72 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 73 fswritefd = -1; 74 if (preen) 75 pfatal("NO WRITE ACCESS"); 76 printf(" (NO WRITE)"); 77 } 78 if (preen == 0) 79 printf("\n"); 80 fsmodified = 0; 81 lfdir = 0; 82 initbarea(&sblk); 83 initbarea(&asblk); 84 sblk.b_un.b_buf = malloc(SBSIZE); 85 asblk.b_un.b_buf = malloc(SBSIZE); 86 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 87 errexit("cannot allocate space for superblock\n"); 88 if (lp = getdisklabel((char *)NULL, fsreadfd)) 89 dev_bsize = secsize = lp->d_secsize; 90 else 91 dev_bsize = secsize = DEV_BSIZE; 92 /* 93 * Read in the superblock, looking for alternates if necessary 94 */ 95 if (readsb(1) == 0) { 96 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 97 return(0); 98 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 99 return (0); 100 for (cg = 0; cg < proto.fs_ncg; cg++) { 101 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 102 if (readsb(0) != 0) 103 break; 104 } 105 if (cg >= proto.fs_ncg) { 106 printf("%s %s\n%s %s\n%s %s\n", 107 "SEARCH FOR ALTERNATE SUPER-BLOCK", 108 "FAILED. YOU MUST USE THE", 109 "-b OPTION TO FSCK TO SPECIFY THE", 110 "LOCATION OF AN ALTERNATE", 111 "SUPER-BLOCK TO SUPPLY NEEDED", 112 "INFORMATION; SEE fsck(8)."); 113 return(0); 114 } 115 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 116 } 117 maxfsblock = sblock.fs_size; 118 maxino = sblock.fs_ncg * sblock.fs_ipg; 119 /* 120 * Check and potentially fix certain fields in the super block. 121 */ 122 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 123 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 124 if (reply("SET TO DEFAULT") == 1) { 125 sblock.fs_optim = FS_OPTTIME; 126 sbdirty(); 127 } 128 } 129 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 130 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 131 sblock.fs_minfree); 132 if (reply("SET TO DEFAULT") == 1) { 133 sblock.fs_minfree = 10; 134 sbdirty(); 135 } 136 } 137 if (sblock.fs_interleave < 1) { 138 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 139 sblock.fs_interleave); 140 sblock.fs_interleave = 1; 141 if (preen) 142 printf(" (FIXED)\n"); 143 if (preen || reply("SET TO DEFAULT") == 1) { 144 sbdirty(); 145 dirty(&asblk); 146 } 147 } 148 if (sblock.fs_npsect < sblock.fs_nsect) { 149 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 150 sblock.fs_npsect); 151 sblock.fs_npsect = sblock.fs_nsect; 152 if (preen) 153 printf(" (FIXED)\n"); 154 if (preen || reply("SET TO DEFAULT") == 1) { 155 sbdirty(); 156 dirty(&asblk); 157 } 158 } 159 if (cvtflag) { 160 if (sblock.fs_postblformat == FS_42POSTBLFMT) { 161 /* 162 * Requested to convert from old format to new format 163 */ 164 if (preen) 165 pwarn("CONVERTING TO NEW FILE SYSTEM FORMAT\n"); 166 else if (!reply("CONVERT TO NEW FILE SYSTEM FORMAT")) 167 return(0); 168 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 169 sblock.fs_nrpos = 8; 170 sblock.fs_postbloff = 171 (char *)(&sblock.fs_opostbl[0][0]) - 172 (char *)(&sblock.fs_link); 173 sblock.fs_rotbloff = &sblock.fs_space[0] - 174 (u_char *)(&sblock.fs_link); 175 sblock.fs_cgsize = 176 fragroundup(&sblock, CGSIZE(&sblock)); 177 /* 178 * Planning now for future expansion. 179 */ 180 # if (BYTE_ORDER == BIG_ENDIAN) 181 sblock.fs_qbmask.val[0] = 0; 182 sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; 183 sblock.fs_qfmask.val[0] = 0; 184 sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; 185 # endif /* BIG_ENDIAN */ 186 # if (BYTE_ORDER == LITTLE_ENDIAN) 187 sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; 188 sblock.fs_qbmask.val[1] = 0; 189 sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; 190 sblock.fs_qfmask.val[1] = 0; 191 # endif /* LITTLE_ENDIAN */ 192 sbdirty(); 193 dirty(&asblk); 194 } else if (sblock.fs_postblformat == FS_DYNAMICPOSTBLFMT) { 195 /* 196 * Requested to convert from new format to old format 197 */ 198 if (sblock.fs_nrpos != 8 || sblock.fs_ipg > 2048 || 199 sblock.fs_cpg > 32 || sblock.fs_cpc > 16) { 200 printf( 201 "PARAMETERS OF CURRENT FILE SYSTEM DO NOT\n\t"); 202 errexit( 203 "ALLOW CONVERSION TO OLD FILE SYSTEM FORMAT\n"); 204 } 205 if (preen) 206 pwarn("CONVERTING TO OLD FILE SYSTEM FORMAT\n"); 207 else if (!reply("CONVERT TO OLD FILE SYSTEM FORMAT")) 208 return(0); 209 sblock.fs_postblformat = FS_42POSTBLFMT; 210 sblock.fs_cgsize = fragroundup(&sblock, 211 sizeof(struct ocg) + howmany(sblock.fs_fpg, NBBY)); 212 sbdirty(); 213 dirty(&asblk); 214 } else { 215 errexit("UNKNOWN FILE SYSTEM FORMAT\n"); 216 } 217 } 218 if (asblk.b_dirty) { 219 bcopy((char *)&sblock, (char *)&altsblock, 220 (int)sblock.fs_sbsize); 221 flush(fswritefd, &asblk); 222 } 223 /* 224 * read in the summary info. 225 */ 226 asked = 0; 227 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 228 size = sblock.fs_cssize - i < sblock.fs_bsize ? 229 sblock.fs_cssize - i : sblock.fs_bsize; 230 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 231 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 232 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 233 size) != 0 && !asked) { 234 pfatal("BAD SUMMARY INFORMATION"); 235 if (reply("CONTINUE") == 0) 236 errexit(""); 237 asked++; 238 } 239 } 240 /* 241 * allocate and initialize the necessary maps 242 */ 243 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 244 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 245 if (blockmap == NULL) { 246 printf("cannot alloc %d bytes for blockmap\n", bmapsize); 247 goto badsb; 248 } 249 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 250 if (statemap == NULL) { 251 printf("cannot alloc %d bytes for statemap\n", maxino + 1); 252 goto badsb; 253 } 254 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 255 if (lncntp == NULL) { 256 printf("cannot alloc %d bytes for lncntp\n", 257 (maxino + 1) * sizeof(short)); 258 goto badsb; 259 } 260 numdirs = sblock.fs_cstotal.cs_ndir; 261 inplast = 0; 262 listmax = numdirs + 10; 263 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 264 sizeof(struct inoinfo *)); 265 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 266 sizeof(struct inoinfo *)); 267 if (inpsort == NULL || inphead == NULL) { 268 printf("cannot alloc %d bytes for inphead\n", 269 numdirs * sizeof(struct inoinfo *)); 270 goto badsb; 271 } 272 bufinit(); 273 return (1); 274 275 badsb: 276 ckfini(); 277 return (0); 278 } 279 280 /* 281 * Read in the super block and its summary info. 282 */ 283 readsb(listerr) 284 int listerr; 285 { 286 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 287 288 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 289 return (0); 290 sblk.b_bno = super; 291 sblk.b_size = SBSIZE; 292 /* 293 * run a few consistency checks of the super block 294 */ 295 if (sblock.fs_magic != FS_MAGIC) 296 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 297 if (sblock.fs_ncg < 1) 298 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 299 if (sblock.fs_cpg < 1) 300 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 301 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 302 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 303 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 304 if (sblock.fs_sbsize > SBSIZE) 305 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 306 /* 307 * Compute block size that the filesystem is based on, 308 * according to fsbtodb, and adjust superblock block number 309 * so we can tell if this is an alternate later. 310 */ 311 super *= dev_bsize; 312 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 313 sblk.b_bno = super / dev_bsize; 314 /* 315 * Set all possible fields that could differ, then do check 316 * of whole super block against an alternate super block. 317 * When an alternate super-block is specified this check is skipped. 318 */ 319 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 320 if (asblk.b_errs) 321 return (0); 322 if (bflag) { 323 havesb = 1; 324 return (1); 325 } 326 altsblock.fs_link = sblock.fs_link; 327 altsblock.fs_rlink = sblock.fs_rlink; 328 altsblock.fs_time = sblock.fs_time; 329 altsblock.fs_cstotal = sblock.fs_cstotal; 330 altsblock.fs_cgrotor = sblock.fs_cgrotor; 331 altsblock.fs_fmod = sblock.fs_fmod; 332 altsblock.fs_clean = sblock.fs_clean; 333 altsblock.fs_ronly = sblock.fs_ronly; 334 altsblock.fs_flags = sblock.fs_flags; 335 altsblock.fs_maxcontig = sblock.fs_maxcontig; 336 altsblock.fs_minfree = sblock.fs_minfree; 337 altsblock.fs_optim = sblock.fs_optim; 338 altsblock.fs_rotdelay = sblock.fs_rotdelay; 339 altsblock.fs_maxbpg = sblock.fs_maxbpg; 340 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 341 sizeof sblock.fs_csp); 342 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 343 sizeof sblock.fs_fsmnt); 344 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 345 sizeof sblock.fs_sparecon); 346 /* 347 * The following should not have to be copied. 348 */ 349 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 350 altsblock.fs_interleave = sblock.fs_interleave; 351 altsblock.fs_npsect = sblock.fs_npsect; 352 altsblock.fs_nrpos = sblock.fs_nrpos; 353 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 354 badsb(listerr, 355 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 356 return (0); 357 } 358 havesb = 1; 359 return (1); 360 } 361 362 badsb(listerr, s) 363 int listerr; 364 char *s; 365 { 366 367 if (!listerr) 368 return; 369 if (preen) 370 printf("%s: ", devname); 371 pfatal("BAD SUPER BLOCK: %s\n", s); 372 } 373 374 /* 375 * Calculate a prototype superblock based on information in the disk label. 376 * When done the cgsblock macro can be calculated and the fs_ncg field 377 * can be used. Do NOT attempt to use other macros without verifying that 378 * their needed information is available! 379 */ 380 calcsb(dev, devfd, fs) 381 char *dev; 382 int devfd; 383 register struct fs *fs; 384 { 385 register struct disklabel *lp; 386 register struct partition *pp; 387 register char *cp; 388 int i; 389 390 cp = index(dev, '\0') - 1; 391 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 392 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 393 return (0); 394 } 395 lp = getdisklabel(dev, devfd); 396 if (isdigit(*cp)) 397 pp = &lp->d_partitions[0]; 398 else 399 pp = &lp->d_partitions[*cp - 'a']; 400 if (pp->p_fstype != FS_BSDFFS) { 401 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 402 dev, pp->p_fstype < FSMAXTYPES ? 403 fstypenames[pp->p_fstype] : "unknown"); 404 return (0); 405 } 406 bzero((char *)fs, sizeof(struct fs)); 407 fs->fs_fsize = pp->p_fsize; 408 fs->fs_frag = pp->p_frag; 409 fs->fs_cpg = pp->p_cpg; 410 fs->fs_size = pp->p_size; 411 fs->fs_ntrak = lp->d_ntracks; 412 fs->fs_nsect = lp->d_nsectors; 413 fs->fs_spc = lp->d_secpercyl; 414 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 415 fs->fs_sblkno = roundup( 416 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 417 fs->fs_frag); 418 fs->fs_cgmask = 0xffffffff; 419 for (i = fs->fs_ntrak; i > 1; i >>= 1) 420 fs->fs_cgmask <<= 1; 421 if (!POWEROF2(fs->fs_ntrak)) 422 fs->fs_cgmask <<= 1; 423 fs->fs_cgoffset = roundup( 424 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 425 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 426 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 427 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 428 fs->fs_fsbtodb++; 429 dev_bsize = lp->d_secsize; 430 return (1); 431 } 432 433 struct disklabel * 434 getdisklabel(s, fd) 435 char *s; 436 int fd; 437 { 438 static struct disklabel lab; 439 440 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 441 if (s == NULL) 442 return ((struct disklabel *)NULL); 443 pwarn(""); 444 perror("ioctl (GDINFO)"); 445 errexit("%s: can't read disk label", s); 446 } 447 return (&lab); 448 } 449