setup.c revision 1.1
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[] = "@(#)setup.c 5.33 (Berkeley) 2/22/91"; 36 #endif /* not lint */ 37 38 #define DKTYPENAMES 39 #include <sys/param.h> 40 #include <ufs/dinode.h> 41 #include <ufs/fs.h> 42 #include <sys/stat.h> 43 #include <sys/ioctl.h> 44 #include <sys/disklabel.h> 45 #include <sys/file.h> 46 #include <errno.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <ctype.h> 50 #include "fsck.h" 51 52 struct bufarea asblk; 53 #define altsblock (*asblk.b_un.b_fs) 54 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 55 56 /* 57 * The size of a cylinder group is calculated by CGSIZE. The maximum size 58 * is limited by the fact that cylinder groups are at most one block. 59 * Its size is derived from the size of the maps maintained in the 60 * cylinder group and the (struct cg) size. 61 */ 62 #define CGSIZE(fs) \ 63 /* base cg */ (sizeof(struct cg) + \ 64 /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ 65 /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ 66 /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ 67 /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) 68 69 char *index(); 70 struct disklabel *getdisklabel(); 71 72 setup(dev) 73 char *dev; 74 { 75 long cg, size, asked, i, j; 76 long bmapsize; 77 struct disklabel *lp; 78 struct stat statb; 79 struct fs proto; 80 81 havesb = 0; 82 if (stat(dev, &statb) < 0) { 83 printf("Can't stat %s: %s\n", dev, strerror(errno)); 84 return (0); 85 } 86 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 87 pfatal("%s is not a character device", dev); 88 if (reply("CONTINUE") == 0) 89 return (0); 90 } 91 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 92 printf("Can't open %s: %s\n", dev, strerror(errno)); 93 return (0); 94 } 95 if (preen == 0) 96 printf("** %s", dev); 97 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 98 fswritefd = -1; 99 if (preen) 100 pfatal("NO WRITE ACCESS"); 101 printf(" (NO WRITE)"); 102 } 103 if (preen == 0) 104 printf("\n"); 105 fsmodified = 0; 106 lfdir = 0; 107 initbarea(&sblk); 108 initbarea(&asblk); 109 sblk.b_un.b_buf = malloc(SBSIZE); 110 asblk.b_un.b_buf = malloc(SBSIZE); 111 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 112 errexit("cannot allocate space for superblock\n"); 113 if (lp = getdisklabel((char *)NULL, fsreadfd)) 114 dev_bsize = secsize = lp->d_secsize; 115 else 116 dev_bsize = secsize = DEV_BSIZE; 117 #ifdef tahoe 118 /* 119 * On the tahoe, the disk label and the disk driver disagree. 120 * The label knows that sectors are 512 bytes, but the disk 121 * drivers will only transfer in 1024 sized pieces. 122 */ 123 secsize = 1024; 124 #endif 125 /* 126 * Read in the superblock, looking for alternates if necessary 127 */ 128 if (readsb(1) == 0) { 129 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 130 return(0); 131 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 132 return (0); 133 for (cg = 0; cg < proto.fs_ncg; cg++) { 134 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 135 if (readsb(0) != 0) 136 break; 137 } 138 if (cg >= proto.fs_ncg) { 139 printf("%s %s\n%s %s\n%s %s\n", 140 "SEARCH FOR ALTERNATE SUPER-BLOCK", 141 "FAILED. YOU MUST USE THE", 142 "-b OPTION TO FSCK TO SPECIFY THE", 143 "LOCATION OF AN ALTERNATE", 144 "SUPER-BLOCK TO SUPPLY NEEDED", 145 "INFORMATION; SEE fsck(8)."); 146 return(0); 147 } 148 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 149 } 150 maxfsblock = sblock.fs_size; 151 maxino = sblock.fs_ncg * sblock.fs_ipg; 152 /* 153 * Check and potentially fix certain fields in the super block. 154 */ 155 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 156 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 157 if (reply("SET TO DEFAULT") == 1) { 158 sblock.fs_optim = FS_OPTTIME; 159 sbdirty(); 160 } 161 } 162 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 163 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 164 sblock.fs_minfree); 165 if (reply("SET TO DEFAULT") == 1) { 166 sblock.fs_minfree = 10; 167 sbdirty(); 168 } 169 } 170 if (sblock.fs_interleave < 1 || 171 sblock.fs_interleave > sblock.fs_nsect) { 172 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 173 sblock.fs_interleave); 174 sblock.fs_interleave = 1; 175 if (preen) 176 printf(" (FIXED)\n"); 177 if (preen || reply("SET TO DEFAULT") == 1) { 178 sbdirty(); 179 dirty(&asblk); 180 } 181 } 182 if (sblock.fs_npsect < sblock.fs_nsect || 183 sblock.fs_npsect > sblock.fs_nsect*2) { 184 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 185 sblock.fs_npsect); 186 sblock.fs_npsect = sblock.fs_nsect; 187 if (preen) 188 printf(" (FIXED)\n"); 189 if (preen || reply("SET TO DEFAULT") == 1) { 190 sbdirty(); 191 dirty(&asblk); 192 } 193 } 194 if (cvtflag) { 195 if (sblock.fs_postblformat == FS_42POSTBLFMT) { 196 /* 197 * Requested to convert from old format to new format 198 */ 199 if (preen) 200 pwarn("CONVERTING TO NEW FILE SYSTEM FORMAT\n"); 201 else if (!reply("CONVERT TO NEW FILE SYSTEM FORMAT")) 202 return(0); 203 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 204 sblock.fs_nrpos = 8; 205 sblock.fs_postbloff = 206 (char *)(&sblock.fs_opostbl[0][0]) - 207 (char *)(&sblock.fs_link); 208 sblock.fs_rotbloff = &sblock.fs_space[0] - 209 (u_char *)(&sblock.fs_link); 210 sblock.fs_cgsize = 211 fragroundup(&sblock, CGSIZE(&sblock)); 212 /* 213 * Planning now for future expansion. 214 */ 215 # if (BYTE_ORDER == BIG_ENDIAN) 216 sblock.fs_qbmask.val[0] = 0; 217 sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; 218 sblock.fs_qfmask.val[0] = 0; 219 sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; 220 # endif /* BIG_ENDIAN */ 221 # if (BYTE_ORDER == LITTLE_ENDIAN) 222 sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; 223 sblock.fs_qbmask.val[1] = 0; 224 sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; 225 sblock.fs_qfmask.val[1] = 0; 226 # endif /* LITTLE_ENDIAN */ 227 sbdirty(); 228 dirty(&asblk); 229 } else if (sblock.fs_postblformat == FS_DYNAMICPOSTBLFMT) { 230 /* 231 * Requested to convert from new format to old format 232 */ 233 if (sblock.fs_nrpos != 8 || sblock.fs_ipg > 2048 || 234 sblock.fs_cpg > 32 || sblock.fs_cpc > 16) { 235 printf( 236 "PARAMETERS OF CURRENT FILE SYSTEM DO NOT\n\t"); 237 errexit( 238 "ALLOW CONVERSION TO OLD FILE SYSTEM FORMAT\n"); 239 } 240 if (preen) 241 pwarn("CONVERTING TO OLD FILE SYSTEM FORMAT\n"); 242 else if (!reply("CONVERT TO OLD FILE SYSTEM FORMAT")) 243 return(0); 244 sblock.fs_postblformat = FS_42POSTBLFMT; 245 sblock.fs_cgsize = fragroundup(&sblock, 246 sizeof(struct ocg) + howmany(sblock.fs_fpg, NBBY)); 247 sbdirty(); 248 dirty(&asblk); 249 } else { 250 errexit("UNKNOWN FILE SYSTEM FORMAT\n"); 251 } 252 } 253 if (asblk.b_dirty) { 254 bcopy((char *)&sblock, (char *)&altsblock, 255 (size_t)sblock.fs_sbsize); 256 flush(fswritefd, &asblk); 257 } 258 /* 259 * read in the summary info. 260 */ 261 asked = 0; 262 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 263 size = sblock.fs_cssize - i < sblock.fs_bsize ? 264 sblock.fs_cssize - i : sblock.fs_bsize; 265 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 266 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 267 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 268 size) != 0 && !asked) { 269 pfatal("BAD SUMMARY INFORMATION"); 270 if (reply("CONTINUE") == 0) 271 errexit(""); 272 asked++; 273 } 274 } 275 /* 276 * allocate and initialize the necessary maps 277 */ 278 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 279 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 280 if (blockmap == NULL) { 281 printf("cannot alloc %u bytes for blockmap\n", 282 (unsigned)bmapsize); 283 goto badsb; 284 } 285 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 286 if (statemap == NULL) { 287 printf("cannot alloc %u bytes for statemap\n", 288 (unsigned)(maxino + 1)); 289 goto badsb; 290 } 291 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 292 if (lncntp == NULL) { 293 printf("cannot alloc %u bytes for lncntp\n", 294 (unsigned)(maxino + 1) * sizeof(short)); 295 goto badsb; 296 } 297 numdirs = sblock.fs_cstotal.cs_ndir; 298 inplast = 0; 299 listmax = numdirs + 10; 300 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 301 sizeof(struct inoinfo *)); 302 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 303 sizeof(struct inoinfo *)); 304 if (inpsort == NULL || inphead == NULL) { 305 printf("cannot alloc %u bytes for inphead\n", 306 (unsigned)numdirs * sizeof(struct inoinfo *)); 307 goto badsb; 308 } 309 bufinit(); 310 return (1); 311 312 badsb: 313 ckfini(); 314 return (0); 315 } 316 317 /* 318 * Read in the super block and its summary info. 319 */ 320 readsb(listerr) 321 int listerr; 322 { 323 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 324 325 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 326 return (0); 327 sblk.b_bno = super; 328 sblk.b_size = SBSIZE; 329 /* 330 * run a few consistency checks of the super block 331 */ 332 if (sblock.fs_magic != FS_MAGIC) 333 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 334 if (sblock.fs_ncg < 1) 335 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 336 if (sblock.fs_cpg < 1) 337 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 338 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 339 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 340 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 341 if (sblock.fs_sbsize > SBSIZE) 342 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 343 /* 344 * Compute block size that the filesystem is based on, 345 * according to fsbtodb, and adjust superblock block number 346 * so we can tell if this is an alternate later. 347 */ 348 super *= dev_bsize; 349 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 350 sblk.b_bno = super / dev_bsize; 351 /* 352 * Set all possible fields that could differ, then do check 353 * of whole super block against an alternate super block. 354 * When an alternate super-block is specified this check is skipped. 355 */ 356 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 357 if (asblk.b_errs) 358 return (0); 359 if (bflag) { 360 havesb = 1; 361 return (1); 362 } 363 altsblock.fs_link = sblock.fs_link; 364 altsblock.fs_rlink = sblock.fs_rlink; 365 altsblock.fs_time = sblock.fs_time; 366 altsblock.fs_cstotal = sblock.fs_cstotal; 367 altsblock.fs_cgrotor = sblock.fs_cgrotor; 368 altsblock.fs_fmod = sblock.fs_fmod; 369 altsblock.fs_clean = sblock.fs_clean; 370 altsblock.fs_ronly = sblock.fs_ronly; 371 altsblock.fs_flags = sblock.fs_flags; 372 altsblock.fs_maxcontig = sblock.fs_maxcontig; 373 altsblock.fs_minfree = sblock.fs_minfree; 374 altsblock.fs_optim = sblock.fs_optim; 375 altsblock.fs_rotdelay = sblock.fs_rotdelay; 376 altsblock.fs_maxbpg = sblock.fs_maxbpg; 377 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 378 sizeof sblock.fs_csp); 379 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 380 sizeof sblock.fs_fsmnt); 381 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 382 sizeof sblock.fs_sparecon); 383 /* 384 * The following should not have to be copied. 385 */ 386 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 387 altsblock.fs_interleave = sblock.fs_interleave; 388 altsblock.fs_npsect = sblock.fs_npsect; 389 altsblock.fs_nrpos = sblock.fs_nrpos; 390 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 391 badsb(listerr, 392 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 393 return (0); 394 } 395 havesb = 1; 396 return (1); 397 } 398 399 badsb(listerr, s) 400 int listerr; 401 char *s; 402 { 403 404 if (!listerr) 405 return; 406 if (preen) 407 printf("%s: ", devname); 408 pfatal("BAD SUPER BLOCK: %s\n", s); 409 } 410 411 /* 412 * Calculate a prototype superblock based on information in the disk label. 413 * When done the cgsblock macro can be calculated and the fs_ncg field 414 * can be used. Do NOT attempt to use other macros without verifying that 415 * their needed information is available! 416 */ 417 calcsb(dev, devfd, fs) 418 char *dev; 419 int devfd; 420 register struct fs *fs; 421 { 422 register struct disklabel *lp; 423 register struct partition *pp; 424 register char *cp; 425 int i; 426 427 cp = index(dev, '\0') - 1; 428 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 429 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 430 return (0); 431 } 432 lp = getdisklabel(dev, devfd); 433 if (isdigit(*cp)) 434 pp = &lp->d_partitions[0]; 435 else 436 pp = &lp->d_partitions[*cp - 'a']; 437 if (pp->p_fstype != FS_BSDFFS) { 438 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 439 dev, pp->p_fstype < FSMAXTYPES ? 440 fstypenames[pp->p_fstype] : "unknown"); 441 return (0); 442 } 443 bzero((char *)fs, sizeof(struct fs)); 444 fs->fs_fsize = pp->p_fsize; 445 fs->fs_frag = pp->p_frag; 446 fs->fs_cpg = pp->p_cpg; 447 fs->fs_size = pp->p_size; 448 fs->fs_ntrak = lp->d_ntracks; 449 fs->fs_nsect = lp->d_nsectors; 450 fs->fs_spc = lp->d_secpercyl; 451 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 452 fs->fs_sblkno = roundup( 453 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 454 fs->fs_frag); 455 fs->fs_cgmask = 0xffffffff; 456 for (i = fs->fs_ntrak; i > 1; i >>= 1) 457 fs->fs_cgmask <<= 1; 458 if (!POWEROF2(fs->fs_ntrak)) 459 fs->fs_cgmask <<= 1; 460 fs->fs_cgoffset = roundup( 461 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 462 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 463 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 464 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 465 fs->fs_fsbtodb++; 466 dev_bsize = lp->d_secsize; 467 return (1); 468 } 469 470 struct disklabel * 471 getdisklabel(s, fd) 472 char *s; 473 int fd; 474 { 475 static struct disklabel lab; 476 477 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 478 if (s == NULL) 479 return ((struct disklabel *)NULL); 480 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 481 errexit("%s: can't read disk label\n", s); 482 } 483 return (&lab); 484 } 485
Indexes created Mon Sep 22 13:09:51 GMT 2025