setup.c revision 7585
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 8.2 (Berkeley) 2/21/94"; 36#endif /* not lint */ 37 38#define DKTYPENAMES 39#include <sys/param.h> 40#include <sys/time.h> 41#include <ufs/ufs/dinode.h> 42#include <ufs/ffs/fs.h> 43#include <sys/stat.h> 44#include <sys/ioctl.h> 45#include <sys/disklabel.h> 46#include <sys/file.h> 47#include <errno.h> 48#include <stdio.h> 49#include <stdlib.h> 50#include <string.h> 51#include <ctype.h> 52#include "fsck.h" 53 54struct bufarea asblk; 55#define altsblock (*asblk.b_un.b_fs) 56#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 57 58static int readsb __P((int listerr)); 59static void badsb __P((int listerr, char *s)); 60static int calcsb __P((char *dev, int devfd, struct fs *fs)); 61static struct disklabel * getdisklabel __P((char *s, int fd)); 62 63 64int 65setup(dev) 66 char *dev; 67{ 68 long cg, size, asked, i, j; 69 long bmapsize; 70 struct disklabel *lp; 71 off_t sizepb; 72 struct stat statb; 73 struct fs proto; 74 75 havesb = 0; 76 fswritefd = -1; 77 if (stat(dev, &statb) < 0) { 78 printf("Can't stat %s: %s\n", dev, strerror(errno)); 79 return (0); 80 } 81 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 82 pfatal("%s is not a character device", dev); 83 if (reply("CONTINUE") == 0) 84 return (0); 85 } 86 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 87 printf("Can't open %s: %s\n", dev, strerror(errno)); 88 return (0); 89 } 90 if (preen == 0) 91 printf("** %s", dev); 92 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 93 fswritefd = -1; 94 if (preen) 95 pfatal("NO WRITE ACCESS"); 96 printf(" (NO WRITE)"); 97 } 98 if (preen == 0) 99 printf("\n"); 100 fsmodified = 0; 101 lfdir = 0; 102 initbarea(&sblk); 103 initbarea(&asblk); 104 sblk.b_un.b_buf = malloc(SBSIZE); 105 asblk.b_un.b_buf = malloc(SBSIZE); 106 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 107 errexit("cannot allocate space for superblock\n"); 108 lp = getdisklabel((char *)NULL, fsreadfd); 109 if (lp) 110 dev_bsize = secsize = lp->d_secsize; 111 else 112 dev_bsize = secsize = DEV_BSIZE; 113 /* 114 * Read in the superblock, looking for alternates if necessary 115 */ 116 if (readsb(1) == 0) { 117 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 118 return(0); 119 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 120 return (0); 121 for (cg = 0; cg < proto.fs_ncg; cg++) { 122 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 123 if (readsb(0) != 0) 124 break; 125 } 126 if (cg >= proto.fs_ncg) { 127 printf("%s %s\n%s %s\n%s %s\n", 128 "SEARCH FOR ALTERNATE SUPER-BLOCK", 129 "FAILED. YOU MUST USE THE", 130 "-b OPTION TO FSCK TO SPECIFY THE", 131 "LOCATION OF AN ALTERNATE", 132 "SUPER-BLOCK TO SUPPLY NEEDED", 133 "INFORMATION; SEE fsck(8)."); 134 bflag = 0; 135 return(0); 136 } 137 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 138 bflag = 0; 139 } 140 maxfsblock = sblock.fs_size; 141 maxino = sblock.fs_ncg * sblock.fs_ipg; 142 /* 143 * Check and potentially fix certain fields in the super block. 144 */ 145 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 146 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 147 if (reply("SET TO DEFAULT") == 1) { 148 sblock.fs_optim = FS_OPTTIME; 149 sbdirty(); 150 } 151 } 152 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 153 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 154 sblock.fs_minfree); 155 if (reply("SET TO DEFAULT") == 1) { 156 sblock.fs_minfree = 10; 157 sbdirty(); 158 } 159 } 160 if (sblock.fs_interleave < 1 || 161 sblock.fs_interleave > sblock.fs_nsect) { 162 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 163 sblock.fs_interleave); 164 sblock.fs_interleave = 1; 165 if (preen) 166 printf(" (FIXED)\n"); 167 if (preen || reply("SET TO DEFAULT") == 1) { 168 sbdirty(); 169 dirty(&asblk); 170 } 171 } 172 if (sblock.fs_npsect < sblock.fs_nsect || 173 sblock.fs_npsect > sblock.fs_nsect*2) { 174 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 175 sblock.fs_npsect); 176 sblock.fs_npsect = sblock.fs_nsect; 177 if (preen) 178 printf(" (FIXED)\n"); 179 if (preen || reply("SET TO DEFAULT") == 1) { 180 sbdirty(); 181 dirty(&asblk); 182 } 183 } 184 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 185 newinofmt = 1; 186 } else { 187 sblock.fs_qbmask = ~sblock.fs_bmask; 188 sblock.fs_qfmask = ~sblock.fs_fmask; 189 newinofmt = 0; 190 } 191 /* 192 * Convert to new inode format. 193 */ 194 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 195 if (preen) 196 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 197 else if (!reply("CONVERT TO NEW INODE FORMAT")) 198 return(0); 199 doinglevel2++; 200 sblock.fs_inodefmt = FS_44INODEFMT; 201 sizepb = sblock.fs_bsize; 202 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 203 for (i = 0; i < NIADDR; i++) { 204 sizepb *= NINDIR(&sblock); 205 sblock.fs_maxfilesize += sizepb; 206 } 207 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 208 sblock.fs_qbmask = ~sblock.fs_bmask; 209 sblock.fs_qfmask = ~sblock.fs_fmask; 210 sbdirty(); 211 dirty(&asblk); 212 } 213 /* 214 * Convert to new cylinder group format. 215 */ 216 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 217 if (preen) 218 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 219 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 220 return(0); 221 doinglevel1++; 222 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 223 sblock.fs_nrpos = 8; 224 sblock.fs_postbloff = 225 (char *)(&sblock.fs_opostbl[0][0]) - 226 (char *)(&sblock.fs_link); 227 sblock.fs_rotbloff = &sblock.fs_space[0] - 228 (u_char *)(&sblock.fs_link); 229 sblock.fs_cgsize = 230 fragroundup(&sblock, CGSIZE(&sblock)); 231 sbdirty(); 232 dirty(&asblk); 233 } 234 if (asblk.b_dirty) { 235 bcopy((char *)&sblock, (char *)&altsblock, 236 (size_t)sblock.fs_sbsize); 237 flush(fswritefd, &asblk); 238 } 239 /* 240 * read in the summary info. 241 */ 242 asked = 0; 243 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 244 size = sblock.fs_cssize - i < sblock.fs_bsize ? 245 sblock.fs_cssize - i : sblock.fs_bsize; 246 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 247 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 248 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 249 size) != 0 && !asked) { 250 pfatal("BAD SUMMARY INFORMATION"); 251 if (reply("CONTINUE") == 0) 252 errexit(""); 253 asked++; 254 } 255 } 256 /* 257 * allocate and initialize the necessary maps 258 */ 259 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 260 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 261 if (blockmap == NULL) { 262 printf("cannot alloc %u bytes for blockmap\n", 263 (unsigned)bmapsize); 264 goto badsb; 265 } 266 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 267 if (statemap == NULL) { 268 printf("cannot alloc %u bytes for statemap\n", 269 (unsigned)(maxino + 1)); 270 goto badsb; 271 } 272 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 273 if (typemap == NULL) { 274 printf("cannot alloc %u bytes for typemap\n", 275 (unsigned)(maxino + 1)); 276 goto badsb; 277 } 278 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 279 if (lncntp == NULL) { 280 printf("cannot alloc %u bytes for lncntp\n", 281 (unsigned)(maxino + 1) * sizeof(short)); 282 goto badsb; 283 } 284 numdirs = sblock.fs_cstotal.cs_ndir; 285 inplast = 0; 286 listmax = numdirs + 10; 287 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 288 sizeof(struct inoinfo *)); 289 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 290 sizeof(struct inoinfo *)); 291 if (inpsort == NULL || inphead == NULL) { 292 printf("cannot alloc %u bytes for inphead\n", 293 (unsigned)numdirs * sizeof(struct inoinfo *)); 294 goto badsb; 295 } 296 bufinit(); 297 return (1); 298 299badsb: 300 ckfini(); 301 return (0); 302} 303 304/* 305 * Read in the super block and its summary info. 306 */ 307static int 308readsb(listerr) 309 int listerr; 310{ 311 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 312 313 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 314 return (0); 315 sblk.b_bno = super; 316 sblk.b_size = SBSIZE; 317 /* 318 * run a few consistency checks of the super block 319 */ 320 if (sblock.fs_magic != FS_MAGIC) 321 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 322 if (sblock.fs_ncg < 1) 323 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 324 if (sblock.fs_cpg < 1) 325 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 326 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 327 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 328 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 329 if (sblock.fs_sbsize > SBSIZE) 330 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 331 /* 332 * Compute block size that the filesystem is based on, 333 * according to fsbtodb, and adjust superblock block number 334 * so we can tell if this is an alternate later. 335 */ 336 super *= dev_bsize; 337 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 338 sblk.b_bno = super / dev_bsize; 339 if (bflag) { 340 havesb = 1; 341 return (1); 342 } 343 /* 344 * Set all possible fields that could differ, then do check 345 * of whole super block against an alternate super block. 346 * When an alternate super-block is specified this check is skipped. 347 */ 348 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 349 if (asblk.b_errs) 350 return (0); 351 altsblock.fs_link = sblock.fs_link; 352 altsblock.fs_rlink = sblock.fs_rlink; 353 altsblock.fs_time = sblock.fs_time; 354 altsblock.fs_cstotal = sblock.fs_cstotal; 355 altsblock.fs_cgrotor = sblock.fs_cgrotor; 356 altsblock.fs_fmod = sblock.fs_fmod; 357 altsblock.fs_clean = sblock.fs_clean; 358 altsblock.fs_ronly = sblock.fs_ronly; 359 altsblock.fs_flags = sblock.fs_flags; 360 altsblock.fs_maxcontig = sblock.fs_maxcontig; 361 altsblock.fs_minfree = sblock.fs_minfree; 362 altsblock.fs_optim = sblock.fs_optim; 363 altsblock.fs_rotdelay = sblock.fs_rotdelay; 364 altsblock.fs_maxbpg = sblock.fs_maxbpg; 365 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 366 sizeof sblock.fs_csp); 367 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 368 sizeof sblock.fs_fsmnt); 369 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 370 sizeof sblock.fs_sparecon); 371 /* 372 * The following should not have to be copied. 373 */ 374 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 375 altsblock.fs_interleave = sblock.fs_interleave; 376 altsblock.fs_npsect = sblock.fs_npsect; 377 altsblock.fs_nrpos = sblock.fs_nrpos; 378 altsblock.fs_qbmask = sblock.fs_qbmask; 379 altsblock.fs_qfmask = sblock.fs_qfmask; 380 altsblock.fs_state = sblock.fs_state; 381 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 382 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 383 badsb(listerr, 384 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 385 return (0); 386 } 387 havesb = 1; 388 return (1); 389} 390 391static void 392badsb(listerr, s) 393 int listerr; 394 char *s; 395{ 396 397 if (!listerr) 398 return; 399 if (preen) 400 printf("%s: ", cdevname); 401 pfatal("BAD SUPER BLOCK: %s\n", s); 402} 403 404/* 405 * Calculate a prototype superblock based on information in the disk label. 406 * When done the cgsblock macro can be calculated and the fs_ncg field 407 * can be used. Do NOT attempt to use other macros without verifying that 408 * their needed information is available! 409 */ 410int 411calcsb(dev, devfd, fs) 412 char *dev; 413 int devfd; 414 register struct fs *fs; 415{ 416 register struct disklabel *lp; 417 register struct partition *pp; 418 register char *cp; 419 int i; 420 421 cp = index(dev, '\0') - 1; 422 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 423 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 424 return (0); 425 } 426 lp = getdisklabel(dev, devfd); 427 if (isdigit(*cp)) 428 pp = &lp->d_partitions[0]; 429 else 430 pp = &lp->d_partitions[*cp - 'a']; 431 if (pp->p_fstype != FS_BSDFFS) { 432 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 433 dev, pp->p_fstype < FSMAXTYPES ? 434 fstypenames[pp->p_fstype] : "unknown"); 435 return (0); 436 } 437 bzero((char *)fs, sizeof(struct fs)); 438 fs->fs_fsize = pp->p_fsize; 439 fs->fs_frag = pp->p_frag; 440 fs->fs_cpg = pp->p_cpg; 441 fs->fs_size = pp->p_size; 442 fs->fs_ntrak = lp->d_ntracks; 443 fs->fs_nsect = lp->d_nsectors; 444 fs->fs_spc = lp->d_secpercyl; 445 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 446 fs->fs_sblkno = roundup( 447 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 448 fs->fs_frag); 449 fs->fs_cgmask = 0xffffffff; 450 for (i = fs->fs_ntrak; i > 1; i >>= 1) 451 fs->fs_cgmask <<= 1; 452 if (!POWEROF2(fs->fs_ntrak)) 453 fs->fs_cgmask <<= 1; 454 fs->fs_cgoffset = roundup( 455 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 456 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 457 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 458 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 459 fs->fs_fsbtodb++; 460 dev_bsize = lp->d_secsize; 461 return (1); 462} 463 464struct disklabel * 465getdisklabel(s, fd) 466 char *s; 467 int fd; 468{ 469 static struct disklabel lab; 470 471 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 472 if (s == NULL) 473 return ((struct disklabel *)NULL); 474 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 475 errexit("%s: can't read disk label\n", s); 476 } 477 return (&lab); 478} 479