setup.c revision 23844
1/* 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. 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 35static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 36#endif /* not lint */ 37 38#define DKTYPENAMES 39#include <sys/param.h> 40#include <sys/time.h> 41#include <sys/stat.h> 42#include <sys/ioctl.h> 43#include <sys/disklabel.h> 44#include <sys/file.h> 45 46#include <ufs/ufs/dinode.h> 47#include <ufs/ffs/fs.h> 48 49#include <ctype.h> 50#include <err.h> 51#include <errno.h> 52#include <string.h> 53 54#include "fsck.h" 55 56struct bufarea asblk; 57#define altsblock (*asblk.b_un.b_fs) 58#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 59 60static void badsb __P((int listerr, char *s)); 61static int calcsb __P((char *dev, int devfd, struct fs *fs)); 62static struct disklabel *getdisklabel __P((char *s, int fd)); 63static int readsb __P((int listerr)); 64 65/* 66 * Read in a superblock finding an alternate if necessary. 67 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 68 * is already clean (preen mode only). 69 */ 70int 71setup(dev) 72 char *dev; 73{ 74 long cg, size, asked, i, j; 75 long skipclean, bmapsize; 76 struct disklabel *lp; 77 off_t sizepb; 78 struct stat statb; 79 struct fs proto; 80 81 havesb = 0; 82 fswritefd = -1; 83 skipclean = preen; 84 if (stat(dev, &statb) < 0) { 85 printf("Can't stat %s: %s\n", dev, strerror(errno)); 86 return (0); 87 } 88 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 89 pfatal("%s is not a character device", dev); 90 if (reply("CONTINUE") == 0) 91 return (0); 92 } 93 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 94 printf("Can't open %s: %s\n", dev, strerror(errno)); 95 return (0); 96 } 97 if (preen == 0) 98 printf("** %s", dev); 99 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 100 fswritefd = -1; 101 if (preen) 102 pfatal("NO WRITE ACCESS"); 103 printf(" (NO WRITE)"); 104 } 105 if (preen == 0) 106 printf("\n"); 107 fsmodified = 0; 108 lfdir = 0; 109 initbarea(&sblk); 110 initbarea(&asblk); 111 sblk.b_un.b_buf = malloc(SBSIZE); 112 asblk.b_un.b_buf = malloc(SBSIZE); 113 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 114 errx(EEXIT, "cannot allocate space for superblock"); 115 lp = getdisklabel((char *)NULL, fsreadfd); 116 if (lp) 117 dev_bsize = secsize = lp->d_secsize; 118 else 119 dev_bsize = secsize = DEV_BSIZE; 120 /* 121 * Read in the superblock, looking for alternates if necessary 122 */ 123 if (readsb(1) == 0) { 124 skipclean = 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 bflag = 0; 143 return(0); 144 } 145 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 146 bflag = 0; 147 } 148 maxfsblock = sblock.fs_size; 149 maxino = sblock.fs_ncg * sblock.fs_ipg; 150 /* 151 * Check and potentially fix certain fields in the super block. 152 */ 153 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 154 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 155 if (reply("SET TO DEFAULT") == 1) { 156 sblock.fs_optim = FS_OPTTIME; 157 sbdirty(); 158 } 159 } 160 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 161 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 162 sblock.fs_minfree); 163 if (reply("SET TO DEFAULT") == 1) { 164 sblock.fs_minfree = 10; 165 sbdirty(); 166 } 167 } 168 if (sblock.fs_interleave < 1 || 169 sblock.fs_interleave > sblock.fs_nsect) { 170 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 171 sblock.fs_interleave); 172 sblock.fs_interleave = 1; 173 if (preen) 174 printf(" (FIXED)\n"); 175 if (preen || reply("SET TO DEFAULT") == 1) { 176 sbdirty(); 177 dirty(&asblk); 178 } 179 } 180 if (sblock.fs_npsect < sblock.fs_nsect || 181 sblock.fs_npsect > sblock.fs_nsect*2) { 182 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 183 sblock.fs_npsect); 184 sblock.fs_npsect = sblock.fs_nsect; 185 if (preen) 186 printf(" (FIXED)\n"); 187 if (preen || reply("SET TO DEFAULT") == 1) { 188 sbdirty(); 189 dirty(&asblk); 190 } 191 } 192 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 193 newinofmt = 1; 194 } else { 195 sblock.fs_qbmask = ~sblock.fs_bmask; 196 sblock.fs_qfmask = ~sblock.fs_fmask; 197 newinofmt = 0; 198 } 199 /* 200 * Convert to new inode format. 201 */ 202 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 203 if (preen) 204 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 205 else if (!reply("CONVERT TO NEW INODE FORMAT")) 206 return(0); 207 doinglevel2++; 208 sblock.fs_inodefmt = FS_44INODEFMT; 209 sizepb = sblock.fs_bsize; 210 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 211 for (i = 0; i < NIADDR; i++) { 212 sizepb *= NINDIR(&sblock); 213 sblock.fs_maxfilesize += sizepb; 214 } 215 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 216 sblock.fs_qbmask = ~sblock.fs_bmask; 217 sblock.fs_qfmask = ~sblock.fs_fmask; 218 sbdirty(); 219 dirty(&asblk); 220 } 221 /* 222 * Convert to new cylinder group format. 223 */ 224 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 225 if (preen) 226 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 227 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 228 return(0); 229 doinglevel1++; 230 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 231 sblock.fs_nrpos = 8; 232 sblock.fs_postbloff = 233 (char *)(&sblock.fs_opostbl[0][0]) - 234 (char *)(&sblock.fs_firstfield); 235 sblock.fs_rotbloff = &sblock.fs_space[0] - 236 (u_char *)(&sblock.fs_firstfield); 237 sblock.fs_cgsize = 238 fragroundup(&sblock, CGSIZE(&sblock)); 239 sbdirty(); 240 dirty(&asblk); 241 } 242 if (asblk.b_dirty && !bflag) { 243 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 244 flush(fswritefd, &asblk); 245 } 246 /* 247 * read in the summary info. 248 */ 249 asked = 0; 250 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 251 size = sblock.fs_cssize - i < sblock.fs_bsize ? 252 sblock.fs_cssize - i : sblock.fs_bsize; 253 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 254 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 255 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 256 size) != 0 && !asked) { 257 pfatal("BAD SUMMARY INFORMATION"); 258 if (reply("CONTINUE") == 0) 259 exit(EEXIT); 260 asked++; 261 } 262 } 263 /* 264 * If we survive the above basic checks and are preening, 265 * quit here unless forced. 266 */ 267 if (skipclean && sblock.fs_clean && !fflag) 268 return (-1); 269 /* 270 * allocate and initialize the necessary maps 271 */ 272 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 273 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 274 if (blockmap == NULL) { 275 printf("cannot alloc %u bytes for blockmap\n", 276 (unsigned)bmapsize); 277 goto badsb; 278 } 279 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 280 if (statemap == NULL) { 281 printf("cannot alloc %u bytes for statemap\n", 282 (unsigned)(maxino + 1)); 283 goto badsb; 284 } 285 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 286 if (typemap == NULL) { 287 printf("cannot alloc %u bytes for typemap\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 312badsb: 313 ckfini(0); 314 return (0); 315} 316 317/* 318 * Read in the super block and its summary info. 319 */ 320static int 321readsb(listerr) 322 int listerr; 323{ 324 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 325 326 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 327 return (0); 328 sblk.b_bno = super; 329 sblk.b_size = SBSIZE; 330 /* 331 * run a few consistency checks of the super block 332 */ 333 if (sblock.fs_magic != FS_MAGIC) 334 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 335 if (sblock.fs_ncg < 1) 336 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 337 if (sblock.fs_cpg < 1) 338 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 339 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 340 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 341 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 342 if (sblock.fs_sbsize > SBSIZE) 343 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 344 /* 345 * Compute block size that the filesystem is based on, 346 * according to fsbtodb, and adjust superblock block number 347 * so we can tell if this is an alternate later. 348 */ 349 super *= dev_bsize; 350 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 351 sblk.b_bno = super / dev_bsize; 352 if (bflag) { 353 havesb = 1; 354 return (1); 355 } 356 /* 357 * Set all possible fields that could differ, then do check 358 * of whole super block against an alternate super block. 359 * When an alternate super-block is specified this check is skipped. 360 */ 361 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 362 if (asblk.b_errs) 363 return (0); 364 altsblock.fs_firstfield = sblock.fs_firstfield; 365 altsblock.fs_unused_1 = sblock.fs_unused_1; 366 altsblock.fs_time = sblock.fs_time; 367 altsblock.fs_cstotal = sblock.fs_cstotal; 368 altsblock.fs_cgrotor = sblock.fs_cgrotor; 369 altsblock.fs_fmod = sblock.fs_fmod; 370 altsblock.fs_clean = sblock.fs_clean; 371 altsblock.fs_ronly = sblock.fs_ronly; 372 altsblock.fs_flags = sblock.fs_flags; 373 altsblock.fs_maxcontig = sblock.fs_maxcontig; 374 altsblock.fs_minfree = sblock.fs_minfree; 375 altsblock.fs_optim = sblock.fs_optim; 376 altsblock.fs_rotdelay = sblock.fs_rotdelay; 377 altsblock.fs_maxbpg = sblock.fs_maxbpg; 378 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 379 altsblock.fs_maxcluster = sblock.fs_maxcluster; 380 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 381 memmove(altsblock.fs_sparecon, 382 sblock.fs_sparecon, 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 altsblock.fs_state = sblock.fs_state; 391 altsblock.fs_qbmask = sblock.fs_qbmask; 392 altsblock.fs_qfmask = sblock.fs_qfmask; 393 altsblock.fs_state = sblock.fs_state; 394 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 395 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 396 if (debug) { 397 long *nlp, *olp, *endlp; 398 399 printf("superblock mismatches\n"); 400 nlp = (long *)&altsblock; 401 olp = (long *)&sblock; 402 endlp = olp + (sblock.fs_sbsize / sizeof *olp); 403 for ( ; olp < endlp; olp++, nlp++) { 404 if (*olp == *nlp) 405 continue; 406 printf("offset %d, original %d, alternate %d\n", 407 olp - (long *)&sblock, *olp, *nlp); 408 } 409 } 410 badsb(listerr, 411 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 412 return (0); 413 } 414 havesb = 1; 415 return (1); 416} 417 418static void 419badsb(listerr, s) 420 int listerr; 421 char *s; 422{ 423 424 if (!listerr) 425 return; 426 if (preen) 427 printf("%s: ", cdevname); 428 pfatal("BAD SUPER BLOCK: %s\n", s); 429} 430 431/* 432 * Calculate a prototype superblock based on information in the disk label. 433 * When done the cgsblock macro can be calculated and the fs_ncg field 434 * can be used. Do NOT attempt to use other macros without verifying that 435 * their needed information is available! 436 */ 437static int 438calcsb(dev, devfd, fs) 439 char *dev; 440 int devfd; 441 register struct fs *fs; 442{ 443 register struct disklabel *lp; 444 register struct partition *pp; 445 register char *cp; 446 int i; 447 448 cp = strchr(dev, '\0') - 1; 449 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 450 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 451 return (0); 452 } 453 lp = getdisklabel(dev, devfd); 454 if (isdigit(*cp)) 455 pp = &lp->d_partitions[0]; 456 else 457 pp = &lp->d_partitions[*cp - 'a']; 458 if (pp->p_fstype != FS_BSDFFS) { 459 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 460 dev, pp->p_fstype < FSMAXTYPES ? 461 fstypenames[pp->p_fstype] : "unknown"); 462 return (0); 463 } 464 memset(fs, 0, sizeof(struct fs)); 465 fs->fs_fsize = pp->p_fsize; 466 fs->fs_frag = pp->p_frag; 467 fs->fs_cpg = pp->p_cpg; 468 fs->fs_size = pp->p_size; 469 fs->fs_ntrak = lp->d_ntracks; 470 fs->fs_nsect = lp->d_nsectors; 471 fs->fs_spc = lp->d_secpercyl; 472 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 473 fs->fs_sblkno = roundup( 474 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 475 fs->fs_frag); 476 fs->fs_cgmask = 0xffffffff; 477 for (i = fs->fs_ntrak; i > 1; i >>= 1) 478 fs->fs_cgmask <<= 1; 479 if (!POWEROF2(fs->fs_ntrak)) 480 fs->fs_cgmask <<= 1; 481 fs->fs_cgoffset = roundup( 482 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 483 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 484 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 485 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 486 fs->fs_fsbtodb++; 487 dev_bsize = lp->d_secsize; 488 return (1); 489} 490 491static struct disklabel * 492getdisklabel(s, fd) 493 char *s; 494 int fd; 495{ 496 static struct disklabel lab; 497 498 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 499 if (s == NULL) 500 return ((struct disklabel *)NULL); 501 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 502 errx(EEXIT, "%s: can't read disk label", s); 503 } 504 return (&lab); 505} 506