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 8.3 (Berkeley) 05/06/94"; 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 struct disklabel *getdisklabel(); 32 33 setup(dev) 34 char *dev; 35 { 36 long cg, size, asked, i, j; 37 long bmapsize; 38 struct disklabel *lp; 39 off_t sizepb; 40 struct stat statb; 41 struct fs proto; 42 43 havesb = 0; 44 fswritefd = -1; 45 if (stat(dev, &statb) < 0) { 46 printf("Can't stat %s: %s\n", dev, strerror(errno)); 47 return (0); 48 } 49 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 50 pfatal("%s is not a character device", dev); 51 if (reply("CONTINUE") == 0) 52 return (0); 53 } 54 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 55 printf("Can't open %s: %s\n", dev, strerror(errno)); 56 return (0); 57 } 58 if (preen == 0) 59 printf("** %s", dev); 60 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 61 fswritefd = -1; 62 if (preen) 63 pfatal("NO WRITE ACCESS"); 64 printf(" (NO WRITE)"); 65 } 66 if (preen == 0) 67 printf("\n"); 68 fsmodified = 0; 69 lfdir = 0; 70 initbarea(&sblk); 71 initbarea(&asblk); 72 sblk.b_un.b_buf = malloc(SBSIZE); 73 asblk.b_un.b_buf = malloc(SBSIZE); 74 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 75 errexit("cannot allocate space for superblock\n"); 76 if (lp = getdisklabel((char *)NULL, fsreadfd)) 77 dev_bsize = secsize = lp->d_secsize; 78 else 79 dev_bsize = secsize = DEV_BSIZE; 80 /* 81 * Read in the superblock, looking for alternates if necessary 82 */ 83 if (readsb(1) == 0) { 84 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 85 return(0); 86 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 87 return (0); 88 for (cg = 0; cg < proto.fs_ncg; cg++) { 89 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 90 if (readsb(0) != 0) 91 break; 92 } 93 if (cg >= proto.fs_ncg) { 94 printf("%s %s\n%s %s\n%s %s\n", 95 "SEARCH FOR ALTERNATE SUPER-BLOCK", 96 "FAILED. YOU MUST USE THE", 97 "-b OPTION TO FSCK TO SPECIFY THE", 98 "LOCATION OF AN ALTERNATE", 99 "SUPER-BLOCK TO SUPPLY NEEDED", 100 "INFORMATION; SEE fsck(8)."); 101 return(0); 102 } 103 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 104 } 105 maxfsblock = sblock.fs_size; 106 maxino = sblock.fs_ncg * sblock.fs_ipg; 107 /* 108 * Check and potentially fix certain fields in the super block. 109 */ 110 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 111 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 112 if (reply("SET TO DEFAULT") == 1) { 113 sblock.fs_optim = FS_OPTTIME; 114 sbdirty(); 115 } 116 } 117 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 118 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 119 sblock.fs_minfree); 120 if (reply("SET TO DEFAULT") == 1) { 121 sblock.fs_minfree = 10; 122 sbdirty(); 123 } 124 } 125 if (sblock.fs_interleave < 1 || 126 sblock.fs_interleave > sblock.fs_nsect) { 127 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 128 sblock.fs_interleave); 129 sblock.fs_interleave = 1; 130 if (preen) 131 printf(" (FIXED)\n"); 132 if (preen || reply("SET TO DEFAULT") == 1) { 133 sbdirty(); 134 dirty(&asblk); 135 } 136 } 137 if (sblock.fs_npsect < sblock.fs_nsect || 138 sblock.fs_npsect > sblock.fs_nsect*2) { 139 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 140 sblock.fs_npsect); 141 sblock.fs_npsect = sblock.fs_nsect; 142 if (preen) 143 printf(" (FIXED)\n"); 144 if (preen || reply("SET TO DEFAULT") == 1) { 145 sbdirty(); 146 dirty(&asblk); 147 } 148 } 149 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 150 newinofmt = 1; 151 } else { 152 sblock.fs_qbmask = ~sblock.fs_bmask; 153 sblock.fs_qfmask = ~sblock.fs_fmask; 154 newinofmt = 0; 155 } 156 /* 157 * Convert to new inode format. 158 */ 159 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 160 if (preen) 161 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 162 else if (!reply("CONVERT TO NEW INODE FORMAT")) 163 return(0); 164 doinglevel2++; 165 sblock.fs_inodefmt = FS_44INODEFMT; 166 sizepb = sblock.fs_bsize; 167 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 168 for (i = 0; i < NIADDR; i++) { 169 sizepb *= NINDIR(&sblock); 170 sblock.fs_maxfilesize += sizepb; 171 } 172 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 173 sblock.fs_qbmask = ~sblock.fs_bmask; 174 sblock.fs_qfmask = ~sblock.fs_fmask; 175 sbdirty(); 176 dirty(&asblk); 177 } 178 /* 179 * Convert to new cylinder group format. 180 */ 181 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 182 if (preen) 183 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 184 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 185 return(0); 186 doinglevel1++; 187 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 188 sblock.fs_nrpos = 8; 189 sblock.fs_postbloff = 190 (char *)(&sblock.fs_opostbl[0][0]) - 191 (char *)(&sblock.fs_link); 192 sblock.fs_rotbloff = &sblock.fs_space[0] - 193 (u_char *)(&sblock.fs_link); 194 sblock.fs_cgsize = 195 fragroundup(&sblock, CGSIZE(&sblock)); 196 sbdirty(); 197 dirty(&asblk); 198 } 199 if (asblk.b_dirty) { 200 bcopy((char *)&sblock, (char *)&altsblock, 201 (size_t)sblock.fs_sbsize); 202 flush(fswritefd, &asblk); 203 } 204 /* 205 * read in the summary info. 206 */ 207 asked = 0; 208 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 209 size = sblock.fs_cssize - i < sblock.fs_bsize ? 210 sblock.fs_cssize - i : sblock.fs_bsize; 211 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 212 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 213 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 214 size) != 0 && !asked) { 215 pfatal("BAD SUMMARY INFORMATION"); 216 if (reply("CONTINUE") == 0) 217 errexit(""); 218 asked++; 219 } 220 } 221 /* 222 * allocate and initialize the necessary maps 223 */ 224 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 225 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 226 if (blockmap == NULL) { 227 printf("cannot alloc %u bytes for blockmap\n", 228 (unsigned)bmapsize); 229 goto badsb; 230 } 231 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 232 if (statemap == NULL) { 233 printf("cannot alloc %u bytes for statemap\n", 234 (unsigned)(maxino + 1)); 235 goto badsb; 236 } 237 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 238 if (typemap == NULL) { 239 printf("cannot alloc %u bytes for typemap\n", 240 (unsigned)(maxino + 1)); 241 goto badsb; 242 } 243 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 244 if (lncntp == NULL) { 245 printf("cannot alloc %u bytes for lncntp\n", 246 (unsigned)(maxino + 1) * sizeof(short)); 247 goto badsb; 248 } 249 numdirs = sblock.fs_cstotal.cs_ndir; 250 inplast = 0; 251 listmax = numdirs + 10; 252 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 253 sizeof(struct inoinfo *)); 254 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 255 sizeof(struct inoinfo *)); 256 if (inpsort == NULL || inphead == NULL) { 257 printf("cannot alloc %u bytes for inphead\n", 258 (unsigned)numdirs * sizeof(struct inoinfo *)); 259 goto badsb; 260 } 261 bufinit(); 262 return (1); 263 264 badsb: 265 ckfini(); 266 return (0); 267 } 268 269 /* 270 * Read in the super block and its summary info. 271 */ 272 readsb(listerr) 273 int listerr; 274 { 275 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 276 277 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 278 return (0); 279 sblk.b_bno = super; 280 sblk.b_size = SBSIZE; 281 /* 282 * run a few consistency checks of the super block 283 */ 284 if (sblock.fs_magic != FS_MAGIC) 285 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 286 if (sblock.fs_ncg < 1) 287 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 288 if (sblock.fs_cpg < 1) 289 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 290 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 291 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 292 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 293 if (sblock.fs_sbsize > SBSIZE) 294 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 295 /* 296 * Compute block size that the filesystem is based on, 297 * according to fsbtodb, and adjust superblock block number 298 * so we can tell if this is an alternate later. 299 */ 300 super *= dev_bsize; 301 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 302 sblk.b_bno = super / dev_bsize; 303 if (bflag) { 304 havesb = 1; 305 return (1); 306 } 307 /* 308 * Set all possible fields that could differ, then do check 309 * of whole super block against an alternate super block. 310 * When an alternate super-block is specified this check is skipped. 311 */ 312 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 313 if (asblk.b_errs) 314 return (0); 315 altsblock.fs_link = sblock.fs_link; 316 altsblock.fs_rlink = sblock.fs_rlink; 317 altsblock.fs_time = sblock.fs_time; 318 altsblock.fs_cstotal = sblock.fs_cstotal; 319 altsblock.fs_cgrotor = sblock.fs_cgrotor; 320 altsblock.fs_fmod = sblock.fs_fmod; 321 altsblock.fs_clean = sblock.fs_clean; 322 altsblock.fs_ronly = sblock.fs_ronly; 323 altsblock.fs_flags = sblock.fs_flags; 324 altsblock.fs_maxcontig = sblock.fs_maxcontig; 325 altsblock.fs_minfree = sblock.fs_minfree; 326 altsblock.fs_optim = sblock.fs_optim; 327 altsblock.fs_rotdelay = sblock.fs_rotdelay; 328 altsblock.fs_maxbpg = sblock.fs_maxbpg; 329 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 330 sizeof sblock.fs_csp); 331 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 332 sizeof sblock.fs_fsmnt); 333 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 334 sizeof sblock.fs_sparecon); 335 /* 336 * The following should not have to be copied. 337 */ 338 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 339 altsblock.fs_interleave = sblock.fs_interleave; 340 altsblock.fs_npsect = sblock.fs_npsect; 341 altsblock.fs_nrpos = sblock.fs_nrpos; 342 altsblock.fs_state = sblock.fs_state; 343 altsblock.fs_qbmask = sblock.fs_qbmask; 344 altsblock.fs_qfmask = sblock.fs_qfmask; 345 altsblock.fs_state = sblock.fs_state; 346 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 347 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 348 badsb(listerr, 349 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 350 return (0); 351 } 352 havesb = 1; 353 return (1); 354 } 355 356 badsb(listerr, s) 357 int listerr; 358 char *s; 359 { 360 361 if (!listerr) 362 return; 363 if (preen) 364 printf("%s: ", cdevname); 365 pfatal("BAD SUPER BLOCK: %s\n", s); 366 } 367 368 /* 369 * Calculate a prototype superblock based on information in the disk label. 370 * When done the cgsblock macro can be calculated and the fs_ncg field 371 * can be used. Do NOT attempt to use other macros without verifying that 372 * their needed information is available! 373 */ 374 calcsb(dev, devfd, fs) 375 char *dev; 376 int devfd; 377 register struct fs *fs; 378 { 379 register struct disklabel *lp; 380 register struct partition *pp; 381 register char *cp; 382 int i; 383 384 cp = index(dev, '\0') - 1; 385 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 386 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 387 return (0); 388 } 389 lp = getdisklabel(dev, devfd); 390 if (isdigit(*cp)) 391 pp = &lp->d_partitions[0]; 392 else 393 pp = &lp->d_partitions[*cp - 'a']; 394 if (pp->p_fstype != FS_BSDFFS) { 395 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 396 dev, pp->p_fstype < FSMAXTYPES ? 397 fstypenames[pp->p_fstype] : "unknown"); 398 return (0); 399 } 400 bzero((char *)fs, sizeof(struct fs)); 401 fs->fs_fsize = pp->p_fsize; 402 fs->fs_frag = pp->p_frag; 403 fs->fs_cpg = pp->p_cpg; 404 fs->fs_size = pp->p_size; 405 fs->fs_ntrak = lp->d_ntracks; 406 fs->fs_nsect = lp->d_nsectors; 407 fs->fs_spc = lp->d_secpercyl; 408 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 409 fs->fs_sblkno = roundup( 410 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 411 fs->fs_frag); 412 fs->fs_cgmask = 0xffffffff; 413 for (i = fs->fs_ntrak; i > 1; i >>= 1) 414 fs->fs_cgmask <<= 1; 415 if (!POWEROF2(fs->fs_ntrak)) 416 fs->fs_cgmask <<= 1; 417 fs->fs_cgoffset = roundup( 418 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 419 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 420 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 421 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 422 fs->fs_fsbtodb++; 423 dev_bsize = lp->d_secsize; 424 return (1); 425 } 426 427 struct disklabel * 428 getdisklabel(s, fd) 429 char *s; 430 int fd; 431 { 432 static struct disklabel lab; 433 434 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 435 if (s == NULL) 436 return ((struct disklabel *)NULL); 437 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 438 errexit("%s: can't read disk label\n", s); 439 } 440 return (&lab); 441 } 442