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 5.41 (Berkeley) 07/16/92"; 10 #endif /* not lint */ 11 12 #define DKTYPENAMES 13 #include <sys/param.h> 14 #include <sys/time.h> 15 #include <ufs/ufs/dinode.h> 16 #include <ufs/ffs/fs.h> 17 #include <sys/stat.h> 18 #include <sys/ioctl.h> 19 #include <sys/disklabel.h> 20 #include <sys/file.h> 21 #include <errno.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <ctype.h> 25 #include "fsck.h" 26 27 struct bufarea asblk; 28 #define altsblock (*asblk.b_un.b_fs) 29 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 30 31 /* 32 * The size of a cylinder group is calculated by CGSIZE. The maximum size 33 * is limited by the fact that cylinder groups are at most one block. 34 * Its size is derived from the size of the maps maintained in the 35 * cylinder group and the (struct cg) size. 36 */ 37 #define CGSIZE(fs) \ 38 /* base cg */ (sizeof(struct cg) + \ 39 /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ 40 /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ 41 /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ 42 /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) 43 44 char *index(); 45 struct disklabel *getdisklabel(); 46 47 setup(dev) 48 char *dev; 49 { 50 long cg, size, asked, i, j; 51 long bmapsize; 52 struct disklabel *lp; 53 off_t sizepb; 54 struct stat statb; 55 struct fs proto; 56 57 havesb = 0; 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 errexit("cannot allocate space for superblock\n"); 89 if (lp = getdisklabel((char *)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 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 98 return(0); 99 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 100 return (0); 101 for (cg = 0; cg < proto.fs_ncg; cg++) { 102 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 103 if (readsb(0) != 0) 104 break; 105 } 106 if (cg >= proto.fs_ncg) { 107 printf("%s %s\n%s %s\n%s %s\n", 108 "SEARCH FOR ALTERNATE SUPER-BLOCK", 109 "FAILED. YOU MUST USE THE", 110 "-b OPTION TO FSCK TO SPECIFY THE", 111 "LOCATION OF AN ALTERNATE", 112 "SUPER-BLOCK TO SUPPLY NEEDED", 113 "INFORMATION; SEE fsck(8)."); 114 return(0); 115 } 116 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 117 } 118 maxfsblock = sblock.fs_size; 119 maxino = sblock.fs_ncg * sblock.fs_ipg; 120 /* 121 * Check and potentially fix certain fields in the super block. 122 */ 123 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 124 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 125 if (reply("SET TO DEFAULT") == 1) { 126 sblock.fs_optim = FS_OPTTIME; 127 sbdirty(); 128 } 129 } 130 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 131 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 132 sblock.fs_minfree); 133 if (reply("SET TO DEFAULT") == 1) { 134 sblock.fs_minfree = 10; 135 sbdirty(); 136 } 137 } 138 if (sblock.fs_interleave < 1 || 139 sblock.fs_interleave > sblock.fs_nsect) { 140 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 141 sblock.fs_interleave); 142 sblock.fs_interleave = 1; 143 if (preen) 144 printf(" (FIXED)\n"); 145 if (preen || reply("SET TO DEFAULT") == 1) { 146 sbdirty(); 147 dirty(&asblk); 148 } 149 } 150 if (sblock.fs_npsect < sblock.fs_nsect || 151 sblock.fs_npsect > sblock.fs_nsect*2) { 152 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 153 sblock.fs_npsect); 154 sblock.fs_npsect = sblock.fs_nsect; 155 if (preen) 156 printf(" (FIXED)\n"); 157 if (preen || reply("SET TO DEFAULT") == 1) { 158 sbdirty(); 159 dirty(&asblk); 160 } 161 } 162 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 163 newinofmt = 1; 164 } else { 165 sblock.fs_qbmask = ~sblock.fs_bmask; 166 sblock.fs_qfmask = ~sblock.fs_fmask; 167 newinofmt = 0; 168 } 169 /* 170 * Convert to new inode format. 171 */ 172 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 173 if (preen) 174 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 175 else if (!reply("CONVERT TO NEW INODE FORMAT")) 176 return(0); 177 doinglevel2++; 178 sblock.fs_inodefmt = FS_44INODEFMT; 179 sizepb = sblock.fs_bsize; 180 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 181 for (i = 0; i < NIADDR; i++) { 182 sizepb *= NINDIR(&sblock); 183 sblock.fs_maxfilesize += sizepb; 184 } 185 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 186 sblock.fs_qbmask = ~sblock.fs_bmask; 187 sblock.fs_qfmask = ~sblock.fs_fmask; 188 sbdirty(); 189 dirty(&asblk); 190 } 191 /* 192 * Convert to new cylinder group format. 193 */ 194 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 195 if (preen) 196 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 197 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 198 return(0); 199 doinglevel1++; 200 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 201 sblock.fs_nrpos = 8; 202 sblock.fs_postbloff = 203 (char *)(&sblock.fs_opostbl[0][0]) - 204 (char *)(&sblock.fs_link); 205 sblock.fs_rotbloff = &sblock.fs_space[0] - 206 (u_char *)(&sblock.fs_link); 207 sblock.fs_cgsize = 208 fragroundup(&sblock, CGSIZE(&sblock)); 209 sbdirty(); 210 dirty(&asblk); 211 } 212 if (asblk.b_dirty) { 213 bcopy((char *)&sblock, (char *)&altsblock, 214 (size_t)sblock.fs_sbsize); 215 flush(fswritefd, &asblk); 216 } 217 /* 218 * read in the summary info. 219 */ 220 asked = 0; 221 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 222 size = sblock.fs_cssize - i < sblock.fs_bsize ? 223 sblock.fs_cssize - i : sblock.fs_bsize; 224 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 225 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 226 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 227 size) != 0 && !asked) { 228 pfatal("BAD SUMMARY INFORMATION"); 229 if (reply("CONTINUE") == 0) 230 errexit(""); 231 asked++; 232 } 233 } 234 /* 235 * allocate and initialize the necessary maps 236 */ 237 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 238 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 239 if (blockmap == NULL) { 240 printf("cannot alloc %u bytes for blockmap\n", 241 (unsigned)bmapsize); 242 goto badsb; 243 } 244 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 245 if (statemap == NULL) { 246 printf("cannot alloc %u bytes for statemap\n", 247 (unsigned)(maxino + 1)); 248 goto badsb; 249 } 250 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 251 if (typemap == NULL) { 252 printf("cannot alloc %u bytes for typemap\n", 253 (unsigned)(maxino + 1)); 254 goto badsb; 255 } 256 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 257 if (lncntp == NULL) { 258 printf("cannot alloc %u bytes for lncntp\n", 259 (unsigned)(maxino + 1) * sizeof(short)); 260 goto badsb; 261 } 262 numdirs = sblock.fs_cstotal.cs_ndir; 263 inplast = 0; 264 listmax = numdirs + 10; 265 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 266 sizeof(struct inoinfo *)); 267 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 268 sizeof(struct inoinfo *)); 269 if (inpsort == NULL || inphead == NULL) { 270 printf("cannot alloc %u bytes for inphead\n", 271 (unsigned)numdirs * sizeof(struct inoinfo *)); 272 goto badsb; 273 } 274 bufinit(); 275 return (1); 276 277 badsb: 278 ckfini(); 279 return (0); 280 } 281 282 /* 283 * Read in the super block and its summary info. 284 */ 285 readsb(listerr) 286 int listerr; 287 { 288 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 289 290 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 291 return (0); 292 sblk.b_bno = super; 293 sblk.b_size = SBSIZE; 294 /* 295 * run a few consistency checks of the super block 296 */ 297 if (sblock.fs_magic != FS_MAGIC) 298 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 299 if (sblock.fs_ncg < 1) 300 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 301 if (sblock.fs_cpg < 1) 302 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 303 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 304 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 305 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 306 if (sblock.fs_sbsize > SBSIZE) 307 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 308 /* 309 * Compute block size that the filesystem is based on, 310 * according to fsbtodb, and adjust superblock block number 311 * so we can tell if this is an alternate later. 312 */ 313 super *= dev_bsize; 314 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 315 sblk.b_bno = super / dev_bsize; 316 if (bflag) { 317 havesb = 1; 318 return (1); 319 } 320 /* 321 * Set all possible fields that could differ, then do check 322 * of whole super block against an alternate super block. 323 * When an alternate super-block is specified this check is skipped. 324 */ 325 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 326 if (asblk.b_errs) 327 return (0); 328 altsblock.fs_link = sblock.fs_link; 329 altsblock.fs_rlink = sblock.fs_rlink; 330 altsblock.fs_time = sblock.fs_time; 331 altsblock.fs_cstotal = sblock.fs_cstotal; 332 altsblock.fs_cgrotor = sblock.fs_cgrotor; 333 altsblock.fs_fmod = sblock.fs_fmod; 334 altsblock.fs_clean = sblock.fs_clean; 335 altsblock.fs_ronly = sblock.fs_ronly; 336 altsblock.fs_flags = sblock.fs_flags; 337 altsblock.fs_maxcontig = sblock.fs_maxcontig; 338 altsblock.fs_minfree = sblock.fs_minfree; 339 altsblock.fs_optim = sblock.fs_optim; 340 altsblock.fs_rotdelay = sblock.fs_rotdelay; 341 altsblock.fs_maxbpg = sblock.fs_maxbpg; 342 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 343 sizeof sblock.fs_csp); 344 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 345 sizeof sblock.fs_fsmnt); 346 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 347 sizeof sblock.fs_sparecon); 348 /* 349 * The following should not have to be copied. 350 */ 351 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 352 altsblock.fs_interleave = sblock.fs_interleave; 353 altsblock.fs_npsect = sblock.fs_npsect; 354 altsblock.fs_nrpos = sblock.fs_nrpos; 355 altsblock.fs_qbmask = sblock.fs_qbmask; 356 altsblock.fs_qfmask = sblock.fs_qfmask; 357 altsblock.fs_state = sblock.fs_state; 358 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 359 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 360 badsb(listerr, 361 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 362 return (0); 363 } 364 havesb = 1; 365 return (1); 366 } 367 368 badsb(listerr, s) 369 int listerr; 370 char *s; 371 { 372 373 if (!listerr) 374 return; 375 if (preen) 376 printf("%s: ", devname); 377 pfatal("BAD SUPER BLOCK: %s\n", s); 378 } 379 380 /* 381 * Calculate a prototype superblock based on information in the disk label. 382 * When done the cgsblock macro can be calculated and the fs_ncg field 383 * can be used. Do NOT attempt to use other macros without verifying that 384 * their needed information is available! 385 */ 386 calcsb(dev, devfd, fs) 387 char *dev; 388 int devfd; 389 register struct fs *fs; 390 { 391 register struct disklabel *lp; 392 register struct partition *pp; 393 register char *cp; 394 int i; 395 396 cp = index(dev, '\0') - 1; 397 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 398 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 399 return (0); 400 } 401 lp = getdisklabel(dev, devfd); 402 if (isdigit(*cp)) 403 pp = &lp->d_partitions[0]; 404 else 405 pp = &lp->d_partitions[*cp - 'a']; 406 if (pp->p_fstype != FS_BSDFFS) { 407 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 408 dev, pp->p_fstype < FSMAXTYPES ? 409 fstypenames[pp->p_fstype] : "unknown"); 410 return (0); 411 } 412 bzero((char *)fs, sizeof(struct fs)); 413 fs->fs_fsize = pp->p_fsize; 414 fs->fs_frag = pp->p_frag; 415 fs->fs_cpg = pp->p_cpg; 416 fs->fs_size = pp->p_size; 417 fs->fs_ntrak = lp->d_ntracks; 418 fs->fs_nsect = lp->d_nsectors; 419 fs->fs_spc = lp->d_secpercyl; 420 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 421 fs->fs_sblkno = roundup( 422 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 423 fs->fs_frag); 424 fs->fs_cgmask = 0xffffffff; 425 for (i = fs->fs_ntrak; i > 1; i >>= 1) 426 fs->fs_cgmask <<= 1; 427 if (!POWEROF2(fs->fs_ntrak)) 428 fs->fs_cgmask <<= 1; 429 fs->fs_cgoffset = roundup( 430 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 431 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 432 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 433 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 434 fs->fs_fsbtodb++; 435 dev_bsize = lp->d_secsize; 436 return (1); 437 } 438 439 struct disklabel * 440 getdisklabel(s, fd) 441 char *s; 442 int fd; 443 { 444 static struct disklabel lab; 445 446 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 447 if (s == NULL) 448 return ((struct disklabel *)NULL); 449 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 450 errexit("%s: can't read disk label\n", s); 451 } 452 return (&lab); 453 } 454