setup.c revision 1.21
1 /* $NetBSD: setup.c,v 1.21 1995/04/12 21:24:12 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)setup.c 8.5 (Berkeley) 11/23/94"; 39 #else 40 static char rcsid[] = "$NetBSD: setup.c,v 1.21 1995/04/12 21:24:12 mycroft Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #define DKTYPENAMES 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #include <ufs/ufs/dinode.h> 48 #include <ufs/ffs/fs.h> 49 #include <sys/stat.h> 50 #include <sys/ioctl.h> 51 #include <sys/disklabel.h> 52 #include <sys/file.h> 53 54 #include <errno.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <ctype.h> 59 #include "fsck.h" 60 #include "extern.h" 61 62 struct bufarea asblk; 63 #define altsblock (*asblk.b_un.b_fs) 64 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 65 66 void badsb __P((int, char *)); 67 int calcsb __P((char *, int, struct fs *)); 68 struct disklabel *getdisklabel(); 69 int readsb __P((int)); 70 71 int 72 setup(dev) 73 char *dev; 74 { 75 long cg, size, asked, i, j; 76 long bmapsize; 77 struct disklabel *lp; 78 off_t sizepb; 79 struct stat statb; 80 struct fs proto; 81 int doskipclean; 82 83 havesb = 0; 84 fswritefd = -1; 85 doskipclean = skipclean; 86 if (stat(dev, &statb) < 0) { 87 printf("Can't stat %s: %s\n", dev, strerror(errno)); 88 return (0); 89 } 90 if (!S_ISCHR(statb.st_mode)) { 91 pfatal("%s is not a character device", dev); 92 if (reply("CONTINUE") == 0) 93 return (0); 94 } 95 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 96 printf("Can't open %s: %s\n", dev, strerror(errno)); 97 return (0); 98 } 99 if (preen == 0) 100 printf("** %s", dev); 101 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 102 fswritefd = -1; 103 if (preen) 104 pfatal("NO WRITE ACCESS"); 105 printf(" (NO WRITE)"); 106 } 107 if (preen == 0) 108 printf("\n"); 109 fsmodified = 0; 110 lfdir = 0; 111 initbarea(&sblk); 112 initbarea(&asblk); 113 sblk.b_un.b_buf = malloc(SBSIZE); 114 asblk.b_un.b_buf = malloc(SBSIZE); 115 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 116 errexit("cannot allocate space for superblock\n"); 117 if (lp = getdisklabel((char *)NULL, fsreadfd)) 118 dev_bsize = secsize = lp->d_secsize; 119 else 120 dev_bsize = secsize = DEV_BSIZE; 121 /* 122 * Read in the superblock, looking for alternates if necessary 123 */ 124 if (readsb(1) == 0) { 125 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 126 return(0); 127 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 128 return (0); 129 for (cg = 0; cg < proto.fs_ncg; cg++) { 130 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 131 if (readsb(0) != 0) 132 break; 133 } 134 if (cg >= proto.fs_ncg) { 135 printf("%s %s\n%s %s\n%s %s\n", 136 "SEARCH FOR ALTERNATE SUPER-BLOCK", 137 "FAILED. YOU MUST USE THE", 138 "-b OPTION TO FSCK TO SPECIFY THE", 139 "LOCATION OF AN ALTERNATE", 140 "SUPER-BLOCK TO SUPPLY NEEDED", 141 "INFORMATION; SEE fsck(8)."); 142 return(0); 143 } 144 doskipclean = 0; 145 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 146 } 147 if (debug) 148 printf("clean = %d\n", sblock.fs_clean); 149 if (sblock.fs_clean & FS_ISCLEAN) { 150 if (preen && doskipclean) { 151 pwarn("file system is clean; not checking\n"); 152 return (-1); 153 } 154 if (!preen) 155 pwarn("** File system is already clean\n"); 156 } 157 maxfsblock = sblock.fs_size; 158 maxino = sblock.fs_ncg * sblock.fs_ipg; 159 /* 160 * Check and potentially fix certain fields in the super block. 161 */ 162 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 163 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 164 if (reply("SET TO DEFAULT") == 1) { 165 sblock.fs_optim = FS_OPTTIME; 166 sbdirty(); 167 } 168 } 169 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 170 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 171 sblock.fs_minfree); 172 if (reply("SET TO DEFAULT") == 1) { 173 sblock.fs_minfree = 10; 174 sbdirty(); 175 } 176 } 177 if (sblock.fs_interleave < 1 || 178 sblock.fs_interleave > sblock.fs_nsect) { 179 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 180 sblock.fs_interleave); 181 sblock.fs_interleave = 1; 182 if (preen) 183 printf(" (FIXED)\n"); 184 if (preen || reply("SET TO DEFAULT") == 1) { 185 sbdirty(); 186 dirty(&asblk); 187 } 188 } 189 if (sblock.fs_npsect < sblock.fs_nsect || 190 sblock.fs_npsect > sblock.fs_nsect*2) { 191 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 192 sblock.fs_npsect); 193 sblock.fs_npsect = sblock.fs_nsect; 194 if (preen) 195 printf(" (FIXED)\n"); 196 if (preen || reply("SET TO DEFAULT") == 1) { 197 sbdirty(); 198 dirty(&asblk); 199 } 200 } 201 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 202 newinofmt = 1; 203 } else { 204 sblock.fs_qbmask = ~sblock.fs_bmask; 205 sblock.fs_qfmask = ~sblock.fs_fmask; 206 newinofmt = 0; 207 } 208 /* 209 * Convert to new inode format. 210 */ 211 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 212 if (preen) 213 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 214 else if (!reply("CONVERT TO NEW INODE FORMAT")) 215 return(0); 216 doinglevel2++; 217 sblock.fs_inodefmt = FS_44INODEFMT; 218 sizepb = sblock.fs_bsize; 219 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 220 for (i = 0; i < NIADDR; i++) { 221 sizepb *= NINDIR(&sblock); 222 sblock.fs_maxfilesize += sizepb; 223 } 224 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 225 sblock.fs_qbmask = ~sblock.fs_bmask; 226 sblock.fs_qfmask = ~sblock.fs_fmask; 227 sbdirty(); 228 dirty(&asblk); 229 } 230 /* 231 * Convert to new cylinder group format. 232 */ 233 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 234 if (preen) 235 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 236 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 237 return(0); 238 doinglevel1++; 239 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 240 sblock.fs_nrpos = 8; 241 sblock.fs_postbloff = 242 (char *)(&sblock.fs_opostbl[0][0]) - 243 (char *)(&sblock.fs_firstfield); 244 sblock.fs_rotbloff = &sblock.fs_space[0] - 245 (u_char *)(&sblock.fs_firstfield); 246 sblock.fs_cgsize = 247 fragroundup(&sblock, CGSIZE(&sblock)); 248 sbdirty(); 249 dirty(&asblk); 250 } 251 if (asblk.b_dirty && !bflag) { 252 memcpy(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 253 flush(fswritefd, &asblk); 254 } 255 /* 256 * read in the summary info. 257 */ 258 asked = 0; 259 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 260 size = sblock.fs_cssize - i < sblock.fs_bsize ? 261 sblock.fs_cssize - i : sblock.fs_bsize; 262 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 263 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 264 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 265 size) != 0 && !asked) { 266 pfatal("BAD SUMMARY INFORMATION"); 267 if (reply("CONTINUE") == 0) 268 errexit(""); 269 asked++; 270 } 271 } 272 /* 273 * allocate and initialize the necessary maps 274 */ 275 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 276 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 277 if (blockmap == NULL) { 278 printf("cannot alloc %u bytes for blockmap\n", 279 (unsigned)bmapsize); 280 goto badsblabel; 281 } 282 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 283 if (statemap == NULL) { 284 printf("cannot alloc %u bytes for statemap\n", 285 (unsigned)(maxino + 1)); 286 goto badsblabel; 287 } 288 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 289 if (typemap == NULL) { 290 printf("cannot alloc %u bytes for typemap\n", 291 (unsigned)(maxino + 1)); 292 goto badsblabel; 293 } 294 lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); 295 if (lncntp == NULL) { 296 printf("cannot alloc %u bytes for lncntp\n", 297 (unsigned)(maxino + 1) * sizeof(int16_t)); 298 goto badsblabel; 299 } 300 numdirs = sblock.fs_cstotal.cs_ndir; 301 inplast = 0; 302 listmax = numdirs + 10; 303 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 304 sizeof(struct inoinfo *)); 305 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 306 sizeof(struct inoinfo *)); 307 if (inpsort == NULL || inphead == NULL) { 308 printf("cannot alloc %u bytes for inphead\n", 309 (unsigned)numdirs * sizeof(struct inoinfo *)); 310 goto badsblabel; 311 } 312 bufinit(); 313 return (1); 314 315 badsblabel: 316 ckfini(0); 317 return (0); 318 } 319 320 /* 321 * Read in the super block and its summary info. 322 */ 323 int 324 readsb(listerr) 325 int listerr; 326 { 327 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 328 329 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 330 return (0); 331 sblk.b_bno = super; 332 sblk.b_size = SBSIZE; 333 /* 334 * run a few consistency checks of the super block 335 */ 336 if (sblock.fs_magic != FS_MAGIC) 337 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 338 if (sblock.fs_ncg < 1) 339 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 340 if (sblock.fs_cpg < 1) 341 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 342 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 343 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 344 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 345 if (sblock.fs_sbsize > SBSIZE) 346 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 347 /* 348 * Compute block size that the filesystem is based on, 349 * according to fsbtodb, and adjust superblock block number 350 * so we can tell if this is an alternate later. 351 */ 352 super *= dev_bsize; 353 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 354 sblk.b_bno = super / dev_bsize; 355 if (bflag) { 356 havesb = 1; 357 return (1); 358 } 359 /* 360 * Set all possible fields that could differ, then do check 361 * of whole super block against an alternate super block. 362 * When an alternate super-block is specified this check is skipped. 363 */ 364 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 365 if (asblk.b_errs) 366 return (0); 367 altsblock.fs_firstfield = sblock.fs_firstfield; 368 altsblock.fs_fscktime = sblock.fs_fscktime; 369 altsblock.fs_time = sblock.fs_time; 370 altsblock.fs_cstotal = sblock.fs_cstotal; 371 altsblock.fs_cgrotor = sblock.fs_cgrotor; 372 altsblock.fs_fmod = sblock.fs_fmod; 373 altsblock.fs_clean = sblock.fs_clean; 374 altsblock.fs_ronly = sblock.fs_ronly; 375 altsblock.fs_flags = sblock.fs_flags; 376 altsblock.fs_maxcontig = sblock.fs_maxcontig; 377 altsblock.fs_minfree = sblock.fs_minfree; 378 altsblock.fs_optim = sblock.fs_optim; 379 altsblock.fs_rotdelay = sblock.fs_rotdelay; 380 altsblock.fs_maxbpg = sblock.fs_maxbpg; 381 memcpy(altsblock.fs_csp, sblock.fs_csp, 382 sizeof sblock.fs_csp); 383 altsblock.fs_maxcluster = sblock.fs_maxcluster; 384 memcpy(altsblock.fs_fsmnt, sblock.fs_fsmnt, 385 sizeof sblock.fs_fsmnt); 386 memcpy(altsblock.fs_sparecon, sblock.fs_sparecon, 387 sizeof sblock.fs_sparecon); 388 /* 389 * The following should not have to be copied. 390 */ 391 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 392 altsblock.fs_interleave = sblock.fs_interleave; 393 altsblock.fs_npsect = sblock.fs_npsect; 394 altsblock.fs_nrpos = sblock.fs_nrpos; 395 altsblock.fs_state = sblock.fs_state; 396 altsblock.fs_qbmask = sblock.fs_qbmask; 397 altsblock.fs_qfmask = sblock.fs_qfmask; 398 altsblock.fs_state = sblock.fs_state; 399 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 400 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 401 if (debug) { 402 long *nlp, *olp, *endlp; 403 404 printf("superblock mismatches\n"); 405 nlp = (long *)&altsblock; 406 olp = (long *)&sblock; 407 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 408 for ( ; olp < endlp; olp++, nlp++) { 409 if (*olp == *nlp) 410 continue; 411 printf("offset %d, original %d, alternate %d\n", 412 olp - (long *)&sblock, *olp, *nlp); 413 } 414 } 415 badsb(listerr, 416 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 417 return (0); 418 } 419 havesb = 1; 420 return (1); 421 } 422 423 void 424 badsb(listerr, s) 425 int listerr; 426 char *s; 427 { 428 429 if (!listerr) 430 return; 431 if (preen) 432 printf("%s: ", cdevname); 433 pfatal("BAD SUPER BLOCK: %s\n", s); 434 } 435 436 /* 437 * Calculate a prototype superblock based on information in the disk label. 438 * When done the cgsblock macro can be calculated and the fs_ncg field 439 * can be used. Do NOT attempt to use other macros without verifying that 440 * their needed information is available! 441 */ 442 int 443 calcsb(dev, devfd, fs) 444 char *dev; 445 int devfd; 446 register struct fs *fs; 447 { 448 register struct disklabel *lp; 449 register struct partition *pp; 450 register char *cp; 451 int i; 452 453 cp = strchr(dev, '\0') - 1; 454 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 455 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 456 return (0); 457 } 458 lp = getdisklabel(dev, devfd); 459 if (isdigit(*cp)) 460 pp = &lp->d_partitions[0]; 461 else 462 pp = &lp->d_partitions[*cp - 'a']; 463 if (pp->p_fstype != FS_BSDFFS) { 464 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 465 dev, pp->p_fstype < FSMAXTYPES ? 466 fstypenames[pp->p_fstype] : "unknown"); 467 return (0); 468 } 469 memset(fs, 0, sizeof(struct fs)); 470 fs->fs_fsize = pp->p_fsize; 471 fs->fs_frag = pp->p_frag; 472 fs->fs_cpg = pp->p_cpg; 473 fs->fs_size = pp->p_size; 474 fs->fs_ntrak = lp->d_ntracks; 475 fs->fs_nsect = lp->d_nsectors; 476 fs->fs_spc = lp->d_secpercyl; 477 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 478 fs->fs_sblkno = roundup( 479 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 480 fs->fs_frag); 481 fs->fs_cgmask = 0xffffffff; 482 for (i = fs->fs_ntrak; i > 1; i >>= 1) 483 fs->fs_cgmask <<= 1; 484 if (!POWEROF2(fs->fs_ntrak)) 485 fs->fs_cgmask <<= 1; 486 fs->fs_cgoffset = roundup( 487 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 488 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 489 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 490 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 491 fs->fs_fsbtodb++; 492 dev_bsize = lp->d_secsize; 493 return (1); 494 } 495 496 struct disklabel * 497 getdisklabel(s, fd) 498 char *s; 499 int fd; 500 { 501 static struct disklabel lab; 502 503 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 504 if (s == NULL) 505 return ((struct disklabel *)NULL); 506 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 507 errexit("%s: can't read disk label\n", s); 508 } 509 return (&lab); 510 } 511
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