setup.c revision 1.7
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, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)setup.c 5.33 (Berkeley) 2/22/91";*/ 36 static char rcsid[] = "$Id: setup.c,v 1.7 1994/04/14 03:25:01 cgd Exp $"; 37 #endif /* not lint */ 38 39 #define DKTYPENAMES 40 #include <sys/param.h> 41 #include <ufs/dinode.h> 42 #include <ufs/fs.h> 43 #include <sys/stat.h> 44 #include <sys/ioctl.h> 45 #include <sys/disklabel.h> 46 #include <sys/file.h> 47 #include <sys/mount.h> 48 #include <errno.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <ctype.h> 52 #include "fsck.h" 53 54 struct bufarea asblk; 55 #define altsblock (*asblk.b_un.b_fs) 56 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 57 58 /* 59 * The size of a cylinder group is calculated by CGSIZE. The maximum size 60 * is limited by the fact that cylinder groups are at most one block. 61 * Its size is derived from the size of the maps maintained in the 62 * cylinder group and the (struct cg) size. 63 */ 64 #define CGSIZE(fs) \ 65 /* base cg */ (sizeof(struct cg) + \ 66 /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ 67 /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ 68 /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ 69 /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) 70 71 char *index(); 72 struct disklabel *getdisklabel(); 73 char *getmntdev(); 74 75 setup(dev) 76 char *dev; 77 { 78 long cg, size, asked, i, j; 79 long bmapsize; 80 struct disklabel *lp; 81 struct stat statb, statb2; 82 struct fs proto; 83 char path2[MAXPATHLEN]; 84 char *dev2; 85 86 havesb = 0; 87 if (stat(dev, &statb) < 0) { 88 printf("Can't stat %s: %s\n", dev, strerror(errno)); 89 return (0); 90 } 91 switch (statb.st_mode & S_IFMT) { 92 case S_IFCHR: 93 break; 94 case S_IFDIR: 95 dev2 = getmntdev(dev); 96 if (dev2 != NULL && !strncmp(dev2, "/dev/", 5)) { 97 snprintf(path2, sizeof(path2), "/dev/r%s", dev2 + 5); 98 if (stat(path2, &statb2) == 0 && 99 (statb2.st_mode & S_IFMT) == S_IFCHR) { 100 dev = path2; 101 statb = statb2; 102 break; 103 } 104 } 105 pfatal("%s is not a character device", dev); 106 if (reply("CONTINUE") == 0) 107 return (0); 108 break; 109 case S_IFBLK: 110 if (!strncmp(dev, "/dev/", 5)) { 111 sprintf(path2, "/dev/r%s", dev + 5); 112 if (stat(path2, &statb2) == 0 && 113 (statb2.st_mode & S_IFMT) == S_IFCHR && 114 minor(statb2.st_rdev) == minor(statb.st_rdev)) { 115 dev = path2; 116 statb = statb2; 117 break; 118 } 119 } 120 /* fall through */ 121 default: 122 pfatal("%s is not a character device", dev); 123 if (reply("CONTINUE") == 0) 124 return (0); 125 } 126 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 127 printf("Can't open %s: %s\n", dev, strerror(errno)); 128 return (0); 129 } 130 if (preen == 0) 131 printf("** %s", dev); 132 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 133 fswritefd = -1; 134 if (preen) 135 pfatal("NO WRITE ACCESS"); 136 printf(" (NO WRITE)"); 137 } 138 if (preen == 0) 139 printf("\n"); 140 fsmodified = 0; 141 lfdir = 0; 142 initbarea(&sblk); 143 initbarea(&asblk); 144 sblk.b_un.b_buf = malloc(SBSIZE); 145 asblk.b_un.b_buf = malloc(SBSIZE); 146 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 147 errexit("cannot allocate space for superblock\n"); 148 if (lp = getdisklabel((char *)NULL, fsreadfd)) 149 dev_bsize = secsize = lp->d_secsize; 150 else 151 dev_bsize = secsize = DEV_BSIZE; 152 #ifdef tahoe 153 /* 154 * On the tahoe, the disk label and the disk driver disagree. 155 * The label knows that sectors are 512 bytes, but the disk 156 * drivers will only transfer in 1024 sized pieces. 157 */ 158 secsize = 1024; 159 #endif 160 /* 161 * Read in the superblock, looking for alternates if necessary 162 */ 163 if (readsb(1) == 0) { 164 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 165 return(0); 166 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 167 return (0); 168 for (cg = 0; cg < proto.fs_ncg; cg++) { 169 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 170 if (readsb(0) != 0) 171 break; 172 } 173 if (cg >= proto.fs_ncg) { 174 printf("%s %s\n%s %s\n%s %s\n", 175 "SEARCH FOR ALTERNATE SUPER-BLOCK", 176 "FAILED. YOU MUST USE THE", 177 "-b OPTION TO FSCK TO SPECIFY THE", 178 "LOCATION OF AN ALTERNATE", 179 "SUPER-BLOCK TO SUPPLY NEEDED", 180 "INFORMATION; SEE fsck(8)."); 181 return(0); 182 } 183 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 184 } 185 maxfsblock = sblock.fs_size; 186 maxino = sblock.fs_ncg * sblock.fs_ipg; 187 /* 188 * Check and potentially fix certain fields in the super block. 189 */ 190 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 191 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 192 if (reply("SET TO DEFAULT") == 1) { 193 sblock.fs_optim = FS_OPTTIME; 194 sbdirty(); 195 } 196 } 197 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 198 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 199 sblock.fs_minfree); 200 if (reply("SET TO DEFAULT") == 1) { 201 sblock.fs_minfree = 10; 202 sbdirty(); 203 } 204 } 205 if (sblock.fs_interleave < 1 || 206 sblock.fs_interleave > sblock.fs_nsect) { 207 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 208 sblock.fs_interleave); 209 sblock.fs_interleave = 1; 210 if (preen) 211 printf(" (FIXED)\n"); 212 if (preen || reply("SET TO DEFAULT") == 1) { 213 sbdirty(); 214 dirty(&asblk); 215 } 216 } 217 if (sblock.fs_npsect < sblock.fs_nsect || 218 sblock.fs_npsect > sblock.fs_nsect*2) { 219 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 220 sblock.fs_npsect); 221 sblock.fs_npsect = sblock.fs_nsect; 222 if (preen) 223 printf(" (FIXED)\n"); 224 if (preen || reply("SET TO DEFAULT") == 1) { 225 sbdirty(); 226 dirty(&asblk); 227 } 228 } 229 if (cvtflag) { 230 if (sblock.fs_postblformat == FS_42POSTBLFMT) { 231 /* 232 * Requested to convert from old format to new format 233 */ 234 if (preen) 235 pwarn("CONVERTING TO NEW FILE SYSTEM FORMAT\n"); 236 else if (!reply("CONVERT TO NEW FILE SYSTEM FORMAT")) 237 return(0); 238 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 239 sblock.fs_nrpos = 8; 240 sblock.fs_postbloff = 241 (char *)(&sblock.fs_opostbl[0][0]) - 242 (char *)(&sblock.fs_link); 243 sblock.fs_rotbloff = &sblock.fs_space[0] - 244 (u_char *)(&sblock.fs_link); 245 sblock.fs_cgsize = 246 fragroundup(&sblock, CGSIZE(&sblock)); 247 /* 248 * Planning now for future expansion. 249 */ 250 # if (BYTE_ORDER == BIG_ENDIAN) 251 sblock.fs_qbmask.val[0] = 0; 252 sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; 253 sblock.fs_qfmask.val[0] = 0; 254 sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; 255 # endif /* BIG_ENDIAN */ 256 # if (BYTE_ORDER == LITTLE_ENDIAN) 257 sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; 258 sblock.fs_qbmask.val[1] = 0; 259 sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; 260 sblock.fs_qfmask.val[1] = 0; 261 # endif /* LITTLE_ENDIAN */ 262 sbdirty(); 263 dirty(&asblk); 264 } else if (sblock.fs_postblformat == FS_DYNAMICPOSTBLFMT) { 265 /* 266 * Requested to convert from new format to old format 267 */ 268 if (sblock.fs_nrpos != 8 || sblock.fs_ipg > 2048 || 269 sblock.fs_cpg > 32 || sblock.fs_cpc > 16) { 270 printf( 271 "PARAMETERS OF CURRENT FILE SYSTEM DO NOT\n\t"); 272 errexit( 273 "ALLOW CONVERSION TO OLD FILE SYSTEM FORMAT\n"); 274 } 275 if (preen) 276 pwarn("CONVERTING TO OLD FILE SYSTEM FORMAT\n"); 277 else if (!reply("CONVERT TO OLD FILE SYSTEM FORMAT")) 278 return(0); 279 sblock.fs_postblformat = FS_42POSTBLFMT; 280 sblock.fs_cgsize = fragroundup(&sblock, 281 sizeof(struct ocg) + howmany(sblock.fs_fpg, NBBY)); 282 sbdirty(); 283 dirty(&asblk); 284 } else { 285 errexit("UNKNOWN FILE SYSTEM FORMAT\n"); 286 } 287 } 288 if (asblk.b_dirty) { 289 bcopy((char *)&sblock, (char *)&altsblock, 290 (size_t)sblock.fs_sbsize); 291 flush(fswritefd, &asblk); 292 } 293 /* 294 * read in the summary info. 295 */ 296 asked = 0; 297 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 298 size = sblock.fs_cssize - i < sblock.fs_bsize ? 299 sblock.fs_cssize - i : sblock.fs_bsize; 300 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 301 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 302 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 303 size) != 0 && !asked) { 304 pfatal("BAD SUMMARY INFORMATION"); 305 if (reply("CONTINUE") == 0) 306 errexit(""); 307 asked++; 308 } 309 } 310 /* 311 * allocate and initialize the necessary maps 312 */ 313 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 314 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 315 if (blockmap == NULL) { 316 printf("cannot alloc %u bytes for blockmap\n", 317 (unsigned)bmapsize); 318 goto badsb; 319 } 320 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 321 if (statemap == NULL) { 322 printf("cannot alloc %u bytes for statemap\n", 323 (unsigned)(maxino + 1)); 324 goto badsb; 325 } 326 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 327 if (lncntp == NULL) { 328 printf("cannot alloc %u bytes for lncntp\n", 329 (unsigned)(maxino + 1) * sizeof(short)); 330 goto badsb; 331 } 332 numdirs = sblock.fs_cstotal.cs_ndir; 333 inplast = 0; 334 listmax = numdirs + 10; 335 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 336 sizeof(struct inoinfo *)); 337 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 338 sizeof(struct inoinfo *)); 339 if (inpsort == NULL || inphead == NULL) { 340 printf("cannot alloc %u bytes for inphead\n", 341 (unsigned)numdirs * sizeof(struct inoinfo *)); 342 goto badsb; 343 } 344 bufinit(); 345 return (1); 346 347 badsb: 348 ckfini(); 349 return (0); 350 } 351 352 /* 353 * Read in the super block and its summary info. 354 */ 355 readsb(listerr) 356 int listerr; 357 { 358 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 359 360 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 361 return (0); 362 sblk.b_bno = super; 363 sblk.b_size = SBSIZE; 364 /* 365 * run a few consistency checks of the super block 366 */ 367 if (sblock.fs_magic != FS_MAGIC) 368 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 369 if (sblock.fs_ncg < 1) 370 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 371 if (sblock.fs_cpg < 1) 372 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 373 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 374 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 375 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 376 if (sblock.fs_sbsize > SBSIZE) 377 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 378 /* 379 * Compute block size that the filesystem is based on, 380 * according to fsbtodb, and adjust superblock block number 381 * so we can tell if this is an alternate later. 382 */ 383 super *= dev_bsize; 384 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 385 sblk.b_bno = super / dev_bsize; 386 /* 387 * Set all possible fields that could differ, then do check 388 * of whole super block against an alternate super block. 389 * When an alternate super-block is specified this check is skipped. 390 */ 391 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 392 if (asblk.b_errs) 393 return (0); 394 if (bflag) { 395 havesb = 1; 396 return (1); 397 } 398 altsblock.fs_link = sblock.fs_link; 399 altsblock.fs_rlink = sblock.fs_rlink; 400 altsblock.fs_time = sblock.fs_time; 401 altsblock.fs_cstotal = sblock.fs_cstotal; 402 altsblock.fs_cgrotor = sblock.fs_cgrotor; 403 altsblock.fs_fmod = sblock.fs_fmod; 404 altsblock.fs_clean = sblock.fs_clean; 405 altsblock.fs_state = sblock.fs_state; 406 altsblock.fs_ronly = sblock.fs_ronly; 407 altsblock.fs_flags = sblock.fs_flags; 408 altsblock.fs_maxcontig = sblock.fs_maxcontig; 409 altsblock.fs_minfree = sblock.fs_minfree; 410 altsblock.fs_optim = sblock.fs_optim; 411 altsblock.fs_rotdelay = sblock.fs_rotdelay; 412 altsblock.fs_maxbpg = sblock.fs_maxbpg; 413 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 414 sizeof sblock.fs_csp); 415 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 416 sizeof sblock.fs_fsmnt); 417 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 418 sizeof sblock.fs_sparecon); 419 /* 420 * The following should not have to be copied. 421 */ 422 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 423 altsblock.fs_interleave = sblock.fs_interleave; 424 altsblock.fs_npsect = sblock.fs_npsect; 425 altsblock.fs_nrpos = sblock.fs_nrpos; 426 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 427 badsb(listerr, 428 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 429 return (0); 430 } 431 havesb = 1; 432 return (1); 433 } 434 435 badsb(listerr, s) 436 int listerr; 437 char *s; 438 { 439 440 if (!listerr) 441 return; 442 if (preen) 443 printf("%s: ", devname); 444 pfatal("BAD SUPER BLOCK: %s\n", s); 445 } 446 447 /* 448 * Calculate a prototype superblock based on information in the disk label. 449 * When done the cgsblock macro can be calculated and the fs_ncg field 450 * can be used. Do NOT attempt to use other macros without verifying that 451 * their needed information is available! 452 */ 453 calcsb(dev, devfd, fs) 454 char *dev; 455 int devfd; 456 register struct fs *fs; 457 { 458 register struct disklabel *lp; 459 register struct partition *pp; 460 register char *cp; 461 int i; 462 463 cp = index(dev, '\0') - 1; 464 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 465 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 466 return (0); 467 } 468 lp = getdisklabel(dev, devfd); 469 if (isdigit(*cp)) 470 pp = &lp->d_partitions[0]; 471 else 472 pp = &lp->d_partitions[*cp - 'a']; 473 if (pp->p_fstype != FS_BSDFFS) { 474 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 475 dev, pp->p_fstype < FSMAXTYPES ? 476 fstypenames[pp->p_fstype] : "unknown"); 477 return (0); 478 } 479 bzero((char *)fs, sizeof(struct fs)); 480 fs->fs_fsize = pp->p_fsize; 481 fs->fs_frag = pp->p_frag; 482 fs->fs_cpg = pp->p_cpg; 483 fs->fs_size = pp->p_size; 484 fs->fs_ntrak = lp->d_ntracks; 485 fs->fs_nsect = lp->d_nsectors; 486 fs->fs_spc = lp->d_secpercyl; 487 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 488 fs->fs_sblkno = roundup( 489 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 490 fs->fs_frag); 491 fs->fs_cgmask = 0xffffffff; 492 for (i = fs->fs_ntrak; i > 1; i >>= 1) 493 fs->fs_cgmask <<= 1; 494 if (!POWEROF2(fs->fs_ntrak)) 495 fs->fs_cgmask <<= 1; 496 fs->fs_cgoffset = roundup( 497 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 498 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 499 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 500 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 501 fs->fs_fsbtodb++; 502 dev_bsize = lp->d_secsize; 503 return (1); 504 } 505 506 struct disklabel * 507 getdisklabel(s, fd) 508 char *s; 509 int fd; 510 { 511 static struct disklabel lab; 512 513 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 514 if (s == NULL) 515 return ((struct disklabel *)NULL); 516 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 517 errexit("%s: can't read disk label\n", s); 518 } 519 return (&lab); 520 } 521 522 char * 523 getmntdev(name) 524 char *name; 525 { 526 long mntsize; 527 register long i; 528 struct statfs *mntbuf; 529 530 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 531 for (i = 0; i < mntsize; i++) { 532 if (!strncmp(mntbuf[i].f_type, MOUNT_UFS, MFSNAMELEN) && 533 !strcmp(mntbuf[i].f_mntonname, name)) 534 return (mntbuf[i].f_mntfromname); 535 } 536 return ((char *)0); 537 } 538
Indexes created Wed Sep 24 05:09:52 GMT 2025