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 8.1 (Berkeley) 06/05/93"; 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 fswritefd = -1; 59 if (stat(dev, &statb) < 0) { 60 printf("Can't stat %s: %s\n", dev, strerror(errno)); 61 return (0); 62 } 63 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 64 pfatal("%s is not a character device", dev); 65 if (reply("CONTINUE") == 0) 66 return (0); 67 } 68 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 69 printf("Can't open %s: %s\n", dev, strerror(errno)); 70 return (0); 71 } 72 if (preen == 0) 73 printf("** %s", dev); 74 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 75 fswritefd = -1; 76 if (preen) 77 pfatal("NO WRITE ACCESS"); 78 printf(" (NO WRITE)"); 79 } 80 if (preen == 0) 81 printf("\n"); 82 fsmodified = 0; 83 lfdir = 0; 84 initbarea(&sblk); 85 initbarea(&asblk); 86 sblk.b_un.b_buf = malloc(SBSIZE); 87 asblk.b_un.b_buf = malloc(SBSIZE); 88 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 89 errexit("cannot allocate space for superblock\n"); 90 if (lp = getdisklabel((char *)NULL, fsreadfd)) 91 dev_bsize = secsize = lp->d_secsize; 92 else 93 dev_bsize = secsize = DEV_BSIZE; 94 /* 95 * Read in the superblock, looking for alternates if necessary 96 */ 97 if (readsb(1) == 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 maxfsblock = sblock.fs_size; 120 maxino = sblock.fs_ncg * sblock.fs_ipg; 121 /* 122 * Check and potentially fix certain fields in the super block. 123 */ 124 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 125 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 126 if (reply("SET TO DEFAULT") == 1) { 127 sblock.fs_optim = FS_OPTTIME; 128 sbdirty(); 129 } 130 } 131 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 132 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 133 sblock.fs_minfree); 134 if (reply("SET TO DEFAULT") == 1) { 135 sblock.fs_minfree = 10; 136 sbdirty(); 137 } 138 } 139 if (sblock.fs_interleave < 1 || 140 sblock.fs_interleave > sblock.fs_nsect) { 141 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 142 sblock.fs_interleave); 143 sblock.fs_interleave = 1; 144 if (preen) 145 printf(" (FIXED)\n"); 146 if (preen || reply("SET TO DEFAULT") == 1) { 147 sbdirty(); 148 dirty(&asblk); 149 } 150 } 151 if (sblock.fs_npsect < sblock.fs_nsect || 152 sblock.fs_npsect > sblock.fs_nsect*2) { 153 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 154 sblock.fs_npsect); 155 sblock.fs_npsect = sblock.fs_nsect; 156 if (preen) 157 printf(" (FIXED)\n"); 158 if (preen || reply("SET TO DEFAULT") == 1) { 159 sbdirty(); 160 dirty(&asblk); 161 } 162 } 163 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 164 newinofmt = 1; 165 } else { 166 sblock.fs_qbmask = ~sblock.fs_bmask; 167 sblock.fs_qfmask = ~sblock.fs_fmask; 168 newinofmt = 0; 169 } 170 /* 171 * Convert to new inode format. 172 */ 173 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 174 if (preen) 175 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 176 else if (!reply("CONVERT TO NEW INODE FORMAT")) 177 return(0); 178 doinglevel2++; 179 sblock.fs_inodefmt = FS_44INODEFMT; 180 sizepb = sblock.fs_bsize; 181 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 182 for (i = 0; i < NIADDR; i++) { 183 sizepb *= NINDIR(&sblock); 184 sblock.fs_maxfilesize += sizepb; 185 } 186 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 187 sblock.fs_qbmask = ~sblock.fs_bmask; 188 sblock.fs_qfmask = ~sblock.fs_fmask; 189 sbdirty(); 190 dirty(&asblk); 191 } 192 /* 193 * Convert to new cylinder group format. 194 */ 195 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 196 if (preen) 197 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 198 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 199 return(0); 200 doinglevel1++; 201 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 202 sblock.fs_nrpos = 8; 203 sblock.fs_postbloff = 204 (char *)(&sblock.fs_opostbl[0][0]) - 205 (char *)(&sblock.fs_link); 206 sblock.fs_rotbloff = &sblock.fs_space[0] - 207 (u_char *)(&sblock.fs_link); 208 sblock.fs_cgsize = 209 fragroundup(&sblock, CGSIZE(&sblock)); 210 sbdirty(); 211 dirty(&asblk); 212 } 213 if (asblk.b_dirty) { 214 bcopy((char *)&sblock, (char *)&altsblock, 215 (size_t)sblock.fs_sbsize); 216 flush(fswritefd, &asblk); 217 } 218 /* 219 * read in the summary info. 220 */ 221 asked = 0; 222 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 223 size = sblock.fs_cssize - i < sblock.fs_bsize ? 224 sblock.fs_cssize - i : sblock.fs_bsize; 225 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 226 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 227 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 228 size) != 0 && !asked) { 229 pfatal("BAD SUMMARY INFORMATION"); 230 if (reply("CONTINUE") == 0) 231 errexit(""); 232 asked++; 233 } 234 } 235 /* 236 * allocate and initialize the necessary maps 237 */ 238 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 239 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 240 if (blockmap == NULL) { 241 printf("cannot alloc %u bytes for blockmap\n", 242 (unsigned)bmapsize); 243 goto badsb; 244 } 245 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 246 if (statemap == NULL) { 247 printf("cannot alloc %u bytes for statemap\n", 248 (unsigned)(maxino + 1)); 249 goto badsb; 250 } 251 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 252 if (typemap == NULL) { 253 printf("cannot alloc %u bytes for typemap\n", 254 (unsigned)(maxino + 1)); 255 goto badsb; 256 } 257 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 258 if (lncntp == NULL) { 259 printf("cannot alloc %u bytes for lncntp\n", 260 (unsigned)(maxino + 1) * sizeof(short)); 261 goto badsb; 262 } 263 numdirs = sblock.fs_cstotal.cs_ndir; 264 inplast = 0; 265 listmax = numdirs + 10; 266 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 267 sizeof(struct inoinfo *)); 268 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 269 sizeof(struct inoinfo *)); 270 if (inpsort == NULL || inphead == NULL) { 271 printf("cannot alloc %u bytes for inphead\n", 272 (unsigned)numdirs * sizeof(struct inoinfo *)); 273 goto badsb; 274 } 275 bufinit(); 276 return (1); 277 278 badsb: 279 ckfini(); 280 return (0); 281 } 282 283 /* 284 * Read in the super block and its summary info. 285 */ 286 readsb(listerr) 287 int listerr; 288 { 289 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 290 291 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 292 return (0); 293 sblk.b_bno = super; 294 sblk.b_size = SBSIZE; 295 /* 296 * run a few consistency checks of the super block 297 */ 298 if (sblock.fs_magic != FS_MAGIC) 299 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 300 if (sblock.fs_ncg < 1) 301 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 302 if (sblock.fs_cpg < 1) 303 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 304 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 305 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 306 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 307 if (sblock.fs_sbsize > SBSIZE) 308 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 309 /* 310 * Compute block size that the filesystem is based on, 311 * according to fsbtodb, and adjust superblock block number 312 * so we can tell if this is an alternate later. 313 */ 314 super *= dev_bsize; 315 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 316 sblk.b_bno = super / dev_bsize; 317 if (bflag) { 318 havesb = 1; 319 return (1); 320 } 321 /* 322 * Set all possible fields that could differ, then do check 323 * of whole super block against an alternate super block. 324 * When an alternate super-block is specified this check is skipped. 325 */ 326 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 327 if (asblk.b_errs) 328 return (0); 329 altsblock.fs_link = sblock.fs_link; 330 altsblock.fs_rlink = sblock.fs_rlink; 331 altsblock.fs_time = sblock.fs_time; 332 altsblock.fs_cstotal = sblock.fs_cstotal; 333 altsblock.fs_cgrotor = sblock.fs_cgrotor; 334 altsblock.fs_fmod = sblock.fs_fmod; 335 altsblock.fs_clean = sblock.fs_clean; 336 altsblock.fs_ronly = sblock.fs_ronly; 337 altsblock.fs_flags = sblock.fs_flags; 338 altsblock.fs_maxcontig = sblock.fs_maxcontig; 339 altsblock.fs_minfree = sblock.fs_minfree; 340 altsblock.fs_optim = sblock.fs_optim; 341 altsblock.fs_rotdelay = sblock.fs_rotdelay; 342 altsblock.fs_maxbpg = sblock.fs_maxbpg; 343 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 344 sizeof sblock.fs_csp); 345 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 346 sizeof sblock.fs_fsmnt); 347 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 348 sizeof sblock.fs_sparecon); 349 /* 350 * The following should not have to be copied. 351 */ 352 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 353 altsblock.fs_interleave = sblock.fs_interleave; 354 altsblock.fs_npsect = sblock.fs_npsect; 355 altsblock.fs_nrpos = sblock.fs_nrpos; 356 altsblock.fs_qbmask = sblock.fs_qbmask; 357 altsblock.fs_qfmask = sblock.fs_qfmask; 358 altsblock.fs_state = sblock.fs_state; 359 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 360 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 361 badsb(listerr, 362 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 363 return (0); 364 } 365 havesb = 1; 366 return (1); 367 } 368 369 badsb(listerr, s) 370 int listerr; 371 char *s; 372 { 373 374 if (!listerr) 375 return; 376 if (preen) 377 printf("%s: ", cdevname); 378 pfatal("BAD SUPER BLOCK: %s\n", s); 379 } 380 381 /* 382 * Calculate a prototype superblock based on information in the disk label. 383 * When done the cgsblock macro can be calculated and the fs_ncg field 384 * can be used. Do NOT attempt to use other macros without verifying that 385 * their needed information is available! 386 */ 387 calcsb(dev, devfd, fs) 388 char *dev; 389 int devfd; 390 register struct fs *fs; 391 { 392 register struct disklabel *lp; 393 register struct partition *pp; 394 register char *cp; 395 int i; 396 397 cp = index(dev, '\0') - 1; 398 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 399 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 400 return (0); 401 } 402 lp = getdisklabel(dev, devfd); 403 if (isdigit(*cp)) 404 pp = &lp->d_partitions[0]; 405 else 406 pp = &lp->d_partitions[*cp - 'a']; 407 if (pp->p_fstype != FS_BSDFFS) { 408 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 409 dev, pp->p_fstype < FSMAXTYPES ? 410 fstypenames[pp->p_fstype] : "unknown"); 411 return (0); 412 } 413 bzero((char *)fs, sizeof(struct fs)); 414 fs->fs_fsize = pp->p_fsize; 415 fs->fs_frag = pp->p_frag; 416 fs->fs_cpg = pp->p_cpg; 417 fs->fs_size = pp->p_size; 418 fs->fs_ntrak = lp->d_ntracks; 419 fs->fs_nsect = lp->d_nsectors; 420 fs->fs_spc = lp->d_secpercyl; 421 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 422 fs->fs_sblkno = roundup( 423 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 424 fs->fs_frag); 425 fs->fs_cgmask = 0xffffffff; 426 for (i = fs->fs_ntrak; i > 1; i >>= 1) 427 fs->fs_cgmask <<= 1; 428 if (!POWEROF2(fs->fs_ntrak)) 429 fs->fs_cgmask <<= 1; 430 fs->fs_cgoffset = roundup( 431 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 432 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 433 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 434 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 435 fs->fs_fsbtodb++; 436 dev_bsize = lp->d_secsize; 437 return (1); 438 } 439 440 struct disklabel * 441 getdisklabel(s, fd) 442 char *s; 443 int fd; 444 { 445 static struct disklabel lab; 446 447 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 448 if (s == NULL) 449 return ((struct disklabel *)NULL); 450 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 451 errexit("%s: can't read disk label\n", s); 452 } 453 return (&lab); 454 } 455