setup.c revision 1558
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 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 <stdlib.h> 49#include <string.h> 50#include <ctype.h> 51#include "fsck.h" 52 53struct bufarea asblk; 54#define altsblock (*asblk.b_un.b_fs) 55#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 56 57struct disklabel *getdisklabel(); 58 59setup(dev) 60 char *dev; 61{ 62 long cg, size, asked, i, j; 63 long bmapsize; 64 struct disklabel *lp; 65 off_t sizepb; 66 struct stat statb; 67 struct fs proto; 68 69 havesb = 0; 70 fswritefd = -1; 71 if (stat(dev, &statb) < 0) { 72 printf("Can't stat %s: %s\n", dev, strerror(errno)); 73 return (0); 74 } 75 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 76 pfatal("%s is not a character device", dev); 77 if (reply("CONTINUE") == 0) 78 return (0); 79 } 80 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 81 printf("Can't open %s: %s\n", dev, strerror(errno)); 82 return (0); 83 } 84 if (preen == 0) 85 printf("** %s", dev); 86 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 87 fswritefd = -1; 88 if (preen) 89 pfatal("NO WRITE ACCESS"); 90 printf(" (NO WRITE)"); 91 } 92 if (preen == 0) 93 printf("\n"); 94 fsmodified = 0; 95 lfdir = 0; 96 initbarea(&sblk); 97 initbarea(&asblk); 98 sblk.b_un.b_buf = malloc(SBSIZE); 99 asblk.b_un.b_buf = malloc(SBSIZE); 100 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 101 errexit("cannot allocate space for superblock\n"); 102 if (lp = getdisklabel((char *)NULL, fsreadfd)) 103 dev_bsize = secsize = lp->d_secsize; 104 else 105 dev_bsize = secsize = DEV_BSIZE; 106 /* 107 * Read in the superblock, looking for alternates if necessary 108 */ 109 if (readsb(1) == 0) { 110 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 111 return(0); 112 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 113 return (0); 114 for (cg = 0; cg < proto.fs_ncg; cg++) { 115 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 116 if (readsb(0) != 0) 117 break; 118 } 119 if (cg >= proto.fs_ncg) { 120 printf("%s %s\n%s %s\n%s %s\n", 121 "SEARCH FOR ALTERNATE SUPER-BLOCK", 122 "FAILED. YOU MUST USE THE", 123 "-b OPTION TO FSCK TO SPECIFY THE", 124 "LOCATION OF AN ALTERNATE", 125 "SUPER-BLOCK TO SUPPLY NEEDED", 126 "INFORMATION; SEE fsck(8)."); 127 return(0); 128 } 129 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 130 } 131 maxfsblock = sblock.fs_size; 132 maxino = sblock.fs_ncg * sblock.fs_ipg; 133 /* 134 * Check and potentially fix certain fields in the super block. 135 */ 136 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 137 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 138 if (reply("SET TO DEFAULT") == 1) { 139 sblock.fs_optim = FS_OPTTIME; 140 sbdirty(); 141 } 142 } 143 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 144 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 145 sblock.fs_minfree); 146 if (reply("SET TO DEFAULT") == 1) { 147 sblock.fs_minfree = 10; 148 sbdirty(); 149 } 150 } 151 if (sblock.fs_interleave < 1 || 152 sblock.fs_interleave > sblock.fs_nsect) { 153 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 154 sblock.fs_interleave); 155 sblock.fs_interleave = 1; 156 if (preen) 157 printf(" (FIXED)\n"); 158 if (preen || reply("SET TO DEFAULT") == 1) { 159 sbdirty(); 160 dirty(&asblk); 161 } 162 } 163 if (sblock.fs_npsect < sblock.fs_nsect || 164 sblock.fs_npsect > sblock.fs_nsect*2) { 165 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 166 sblock.fs_npsect); 167 sblock.fs_npsect = sblock.fs_nsect; 168 if (preen) 169 printf(" (FIXED)\n"); 170 if (preen || reply("SET TO DEFAULT") == 1) { 171 sbdirty(); 172 dirty(&asblk); 173 } 174 } 175 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 176 newinofmt = 1; 177 } else { 178 sblock.fs_qbmask = ~sblock.fs_bmask; 179 sblock.fs_qfmask = ~sblock.fs_fmask; 180 newinofmt = 0; 181 } 182 /* 183 * Convert to new inode format. 184 */ 185 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 186 if (preen) 187 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 188 else if (!reply("CONVERT TO NEW INODE FORMAT")) 189 return(0); 190 doinglevel2++; 191 sblock.fs_inodefmt = FS_44INODEFMT; 192 sizepb = sblock.fs_bsize; 193 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 194 for (i = 0; i < NIADDR; i++) { 195 sizepb *= NINDIR(&sblock); 196 sblock.fs_maxfilesize += sizepb; 197 } 198 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 199 sblock.fs_qbmask = ~sblock.fs_bmask; 200 sblock.fs_qfmask = ~sblock.fs_fmask; 201 sbdirty(); 202 dirty(&asblk); 203 } 204 /* 205 * Convert to new cylinder group format. 206 */ 207 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 208 if (preen) 209 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 210 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 211 return(0); 212 doinglevel1++; 213 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 214 sblock.fs_nrpos = 8; 215 sblock.fs_postbloff = 216 (char *)(&sblock.fs_opostbl[0][0]) - 217 (char *)(&sblock.fs_link); 218 sblock.fs_rotbloff = &sblock.fs_space[0] - 219 (u_char *)(&sblock.fs_link); 220 sblock.fs_cgsize = 221 fragroundup(&sblock, CGSIZE(&sblock)); 222 sbdirty(); 223 dirty(&asblk); 224 } 225 if (asblk.b_dirty) { 226 bcopy((char *)&sblock, (char *)&altsblock, 227 (size_t)sblock.fs_sbsize); 228 flush(fswritefd, &asblk); 229 } 230 /* 231 * read in the summary info. 232 */ 233 asked = 0; 234 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 235 size = sblock.fs_cssize - i < sblock.fs_bsize ? 236 sblock.fs_cssize - i : sblock.fs_bsize; 237 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 238 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 239 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 240 size) != 0 && !asked) { 241 pfatal("BAD SUMMARY INFORMATION"); 242 if (reply("CONTINUE") == 0) 243 errexit(""); 244 asked++; 245 } 246 } 247 /* 248 * allocate and initialize the necessary maps 249 */ 250 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 251 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 252 if (blockmap == NULL) { 253 printf("cannot alloc %u bytes for blockmap\n", 254 (unsigned)bmapsize); 255 goto badsb; 256 } 257 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 258 if (statemap == NULL) { 259 printf("cannot alloc %u bytes for statemap\n", 260 (unsigned)(maxino + 1)); 261 goto badsb; 262 } 263 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 264 if (typemap == NULL) { 265 printf("cannot alloc %u bytes for typemap\n", 266 (unsigned)(maxino + 1)); 267 goto badsb; 268 } 269 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 270 if (lncntp == NULL) { 271 printf("cannot alloc %u bytes for lncntp\n", 272 (unsigned)(maxino + 1) * sizeof(short)); 273 goto badsb; 274 } 275 numdirs = sblock.fs_cstotal.cs_ndir; 276 inplast = 0; 277 listmax = numdirs + 10; 278 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 279 sizeof(struct inoinfo *)); 280 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 281 sizeof(struct inoinfo *)); 282 if (inpsort == NULL || inphead == NULL) { 283 printf("cannot alloc %u bytes for inphead\n", 284 (unsigned)numdirs * sizeof(struct inoinfo *)); 285 goto badsb; 286 } 287 bufinit(); 288 return (1); 289 290badsb: 291 ckfini(); 292 return (0); 293} 294 295/* 296 * Read in the super block and its summary info. 297 */ 298readsb(listerr) 299 int listerr; 300{ 301 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 302 303 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 304 return (0); 305 sblk.b_bno = super; 306 sblk.b_size = SBSIZE; 307 /* 308 * run a few consistency checks of the super block 309 */ 310 if (sblock.fs_magic != FS_MAGIC) 311 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 312 if (sblock.fs_ncg < 1) 313 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 314 if (sblock.fs_cpg < 1) 315 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 316 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 317 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 318 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 319 if (sblock.fs_sbsize > SBSIZE) 320 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 321 /* 322 * Compute block size that the filesystem is based on, 323 * according to fsbtodb, and adjust superblock block number 324 * so we can tell if this is an alternate later. 325 */ 326 super *= dev_bsize; 327 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 328 sblk.b_bno = super / dev_bsize; 329 if (bflag) { 330 havesb = 1; 331 return (1); 332 } 333 /* 334 * Set all possible fields that could differ, then do check 335 * of whole super block against an alternate super block. 336 * When an alternate super-block is specified this check is skipped. 337 */ 338 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 339 if (asblk.b_errs) 340 return (0); 341 altsblock.fs_link = sblock.fs_link; 342 altsblock.fs_rlink = sblock.fs_rlink; 343 altsblock.fs_time = sblock.fs_time; 344 altsblock.fs_cstotal = sblock.fs_cstotal; 345 altsblock.fs_cgrotor = sblock.fs_cgrotor; 346 altsblock.fs_fmod = sblock.fs_fmod; 347 altsblock.fs_clean = sblock.fs_clean; 348 altsblock.fs_ronly = sblock.fs_ronly; 349 altsblock.fs_flags = sblock.fs_flags; 350 altsblock.fs_maxcontig = sblock.fs_maxcontig; 351 altsblock.fs_minfree = sblock.fs_minfree; 352 altsblock.fs_optim = sblock.fs_optim; 353 altsblock.fs_rotdelay = sblock.fs_rotdelay; 354 altsblock.fs_maxbpg = sblock.fs_maxbpg; 355 bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 356 sizeof sblock.fs_csp); 357 bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 358 sizeof sblock.fs_fsmnt); 359 bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 360 sizeof sblock.fs_sparecon); 361 /* 362 * The following should not have to be copied. 363 */ 364 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 365 altsblock.fs_interleave = sblock.fs_interleave; 366 altsblock.fs_npsect = sblock.fs_npsect; 367 altsblock.fs_nrpos = sblock.fs_nrpos; 368 altsblock.fs_qbmask = sblock.fs_qbmask; 369 altsblock.fs_qfmask = sblock.fs_qfmask; 370 altsblock.fs_state = sblock.fs_state; 371 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 372 if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 373 badsb(listerr, 374 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 375 return (0); 376 } 377 havesb = 1; 378 return (1); 379} 380 381badsb(listerr, s) 382 int listerr; 383 char *s; 384{ 385 386 if (!listerr) 387 return; 388 if (preen) 389 printf("%s: ", cdevname); 390 pfatal("BAD SUPER BLOCK: %s\n", s); 391} 392 393/* 394 * Calculate a prototype superblock based on information in the disk label. 395 * When done the cgsblock macro can be calculated and the fs_ncg field 396 * can be used. Do NOT attempt to use other macros without verifying that 397 * their needed information is available! 398 */ 399calcsb(dev, devfd, fs) 400 char *dev; 401 int devfd; 402 register struct fs *fs; 403{ 404 register struct disklabel *lp; 405 register struct partition *pp; 406 register char *cp; 407 int i; 408 409 cp = index(dev, '\0') - 1; 410 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 411 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 412 return (0); 413 } 414 lp = getdisklabel(dev, devfd); 415 if (isdigit(*cp)) 416 pp = &lp->d_partitions[0]; 417 else 418 pp = &lp->d_partitions[*cp - 'a']; 419 if (pp->p_fstype != FS_BSDFFS) { 420 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 421 dev, pp->p_fstype < FSMAXTYPES ? 422 fstypenames[pp->p_fstype] : "unknown"); 423 return (0); 424 } 425 bzero((char *)fs, sizeof(struct fs)); 426 fs->fs_fsize = pp->p_fsize; 427 fs->fs_frag = pp->p_frag; 428 fs->fs_cpg = pp->p_cpg; 429 fs->fs_size = pp->p_size; 430 fs->fs_ntrak = lp->d_ntracks; 431 fs->fs_nsect = lp->d_nsectors; 432 fs->fs_spc = lp->d_secpercyl; 433 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 434 fs->fs_sblkno = roundup( 435 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 436 fs->fs_frag); 437 fs->fs_cgmask = 0xffffffff; 438 for (i = fs->fs_ntrak; i > 1; i >>= 1) 439 fs->fs_cgmask <<= 1; 440 if (!POWEROF2(fs->fs_ntrak)) 441 fs->fs_cgmask <<= 1; 442 fs->fs_cgoffset = roundup( 443 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 444 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 445 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 446 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 447 fs->fs_fsbtodb++; 448 dev_bsize = lp->d_secsize; 449 return (1); 450} 451 452struct disklabel * 453getdisklabel(s, fd) 454 char *s; 455 int fd; 456{ 457 static struct disklabel lab; 458 459 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 460 if (s == NULL) 461 return ((struct disklabel *)NULL); 462 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 463 errexit("%s: can't read disk label\n", s); 464 } 465 return (&lab); 466} 467