setup.c revision 1.12
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 35 /*static char sccsid[] = "from: @(#)setup.c 8.2 (Berkeley) 2/21/94";*/ 36 static char *rcsid = "$Id: setup.c,v 1.12 1994/09/23 14:27:21 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #define DKTYPENAMES 40 #include <sys/param.h> 41 #include <sys/time.h> 42 #include <ufs/ufs/dinode.h> 43 #include <ufs/ffs/fs.h> 44 #include <sys/stat.h> 45 #include <sys/ioctl.h> 46 #include <sys/disklabel.h> 47 #include <sys/file.h> 48 #include <errno.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <ctype.h> 52 #include "fsck.h" 53 54 struct bufarea asblk; 55 #define altsblock (*asblk.b_un.b_fs) 56 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 57 58 struct disklabel *getdisklabel(); 59 60 setup(dev) 61 char *dev; 62 { 63 long cg, size, asked, i, j; 64 long bmapsize; 65 struct disklabel *lp; 66 off_t sizepb; 67 struct stat statb; 68 struct fs proto; 69 70 havesb = 0; 71 fswritefd = -1; 72 if (stat(dev, &statb) < 0) { 73 printf("Can't stat %s: %s\n", dev, strerror(errno)); 74 return (0); 75 } 76 if ((statb.st_mode & S_IFMT) != S_IFCHR) { 77 pfatal("%s is not a character device", dev); 78 if (reply("CONTINUE") == 0) 79 return (0); 80 } 81 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 82 printf("Can't open %s: %s\n", dev, strerror(errno)); 83 return (0); 84 } 85 if (preen == 0) 86 printf("** %s", dev); 87 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 88 fswritefd = -1; 89 if (preen) 90 pfatal("NO WRITE ACCESS"); 91 printf(" (NO WRITE)"); 92 } 93 if (preen == 0) 94 printf("\n"); 95 fsmodified = 0; 96 lfdir = 0; 97 initbarea(&sblk); 98 initbarea(&asblk); 99 sblk.b_un.b_buf = malloc(SBSIZE); 100 asblk.b_un.b_buf = malloc(SBSIZE); 101 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 102 errexit("cannot allocate space for superblock\n"); 103 if (lp = getdisklabel((char *)NULL, fsreadfd)) 104 dev_bsize = secsize = lp->d_secsize; 105 else 106 dev_bsize = secsize = DEV_BSIZE; 107 /* 108 * Read in the superblock, looking for alternates if necessary 109 */ 110 if (readsb(1) == 0) { 111 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 112 return(0); 113 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 114 return (0); 115 for (cg = 0; cg < proto.fs_ncg; cg++) { 116 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 117 if (readsb(0) != 0) 118 break; 119 } 120 if (cg >= proto.fs_ncg) { 121 printf("%s %s\n%s %s\n%s %s\n", 122 "SEARCH FOR ALTERNATE SUPER-BLOCK", 123 "FAILED. YOU MUST USE THE", 124 "-b OPTION TO FSCK TO SPECIFY THE", 125 "LOCATION OF AN ALTERNATE", 126 "SUPER-BLOCK TO SUPPLY NEEDED", 127 "INFORMATION; SEE fsck(8)."); 128 return(0); 129 } 130 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 131 } 132 maxfsblock = sblock.fs_size; 133 maxino = sblock.fs_ncg * sblock.fs_ipg; 134 /* 135 * Check and potentially fix certain fields in the super block. 136 */ 137 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 138 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 139 if (reply("SET TO DEFAULT") == 1) { 140 sblock.fs_optim = FS_OPTTIME; 141 sbdirty(); 142 } 143 } 144 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 145 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 146 sblock.fs_minfree); 147 if (reply("SET TO DEFAULT") == 1) { 148 sblock.fs_minfree = 10; 149 sbdirty(); 150 } 151 } 152 if (sblock.fs_interleave < 1 || 153 sblock.fs_interleave > sblock.fs_nsect) { 154 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 155 sblock.fs_interleave); 156 sblock.fs_interleave = 1; 157 if (preen) 158 printf(" (FIXED)\n"); 159 if (preen || reply("SET TO DEFAULT") == 1) { 160 sbdirty(); 161 dirty(&asblk); 162 } 163 } 164 if (sblock.fs_npsect < sblock.fs_nsect || 165 sblock.fs_npsect > sblock.fs_nsect*2) { 166 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 167 sblock.fs_npsect); 168 sblock.fs_npsect = sblock.fs_nsect; 169 if (preen) 170 printf(" (FIXED)\n"); 171 if (preen || reply("SET TO DEFAULT") == 1) { 172 sbdirty(); 173 dirty(&asblk); 174 } 175 } 176 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 177 newinofmt = 1; 178 } else { 179 sblock.fs_qbmask = ~sblock.fs_bmask; 180 sblock.fs_qfmask = ~sblock.fs_fmask; 181 newinofmt = 0; 182 } 183 /* 184 * Convert to new inode format. 185 */ 186 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 187 if (preen) 188 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 189 else if (!reply("CONVERT TO NEW INODE FORMAT")) 190 return(0); 191 doinglevel2++; 192 sblock.fs_inodefmt = FS_44INODEFMT; 193 sizepb = sblock.fs_bsize; 194 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 195 for (i = 0; i < NIADDR; i++) { 196 sizepb *= NINDIR(&sblock); 197 sblock.fs_maxfilesize += sizepb; 198 } 199 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 200 sblock.fs_qbmask = ~sblock.fs_bmask; 201 sblock.fs_qfmask = ~sblock.fs_fmask; 202 sbdirty(); 203 dirty(&asblk); 204 } 205 /* 206 * Convert to new cylinder group format. 207 */ 208 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 209 if (preen) 210 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 211 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 212 return(0); 213 doinglevel1++; 214 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 215 sblock.fs_nrpos = 8; 216 sblock.fs_postbloff = 217 (char *)(&sblock.fs_opostbl[0][0]) - 218 (char *)(&sblock.fs_link); 219 sblock.fs_rotbloff = &sblock.fs_space[0] - 220 (u_char *)(&sblock.fs_link); 221 sblock.fs_cgsize = 222 fragroundup(&sblock, CGSIZE(&sblock)); 223 sbdirty(); 224 dirty(&asblk); 225 } 226 if (asblk.b_dirty && !bflag) { 227 memcpy(&altsblock, &sblock, (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); 289 290 badsb: 291 ckfini(); 292 return (0); 293 } 294 295 /* 296 * Read in the super block and its summary info. 297 */ 298 readsb(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 memcpy(altsblock.fs_csp, sblock.fs_csp, 356 sizeof sblock.fs_csp); 357 memcpy(altsblock.fs_fsmnt, sblock.fs_fsmnt, 358 sizeof sblock.fs_fsmnt); 359 memcpy(altsblock.fs_sparecon, sblock.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 } 380 381 badsb(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 */ 399 calcsb(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 = strchr(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 memset(fs, 0, 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 } 451 452 struct disklabel * 453 getdisklabel(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
Indexes created Fri Sep 26 08:10:20 GMT 2025