setup.c revision 1.15
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 1.15 1994/12/05 20:16:06 cgd 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 49 #include <errno.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <ctype.h> 54 #include "fsck.h" 55 #include "extern.h" 56 57 struct bufarea asblk; 58 #define altsblock (*asblk.b_un.b_fs) 59 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 60 61 void badsb __P((int, char *)); 62 int calcsb __P((char *, int, struct fs *)); 63 struct disklabel *getdisklabel(); 64 int readsb __P((int)); 65 66 int 67 setup(dev) 68 char *dev; 69 { 70 long cg, size, asked, i, j; 71 long bmapsize; 72 struct disklabel *lp; 73 off_t sizepb; 74 struct stat statb; 75 struct fs proto; 76 77 havesb = 0; 78 fswritefd = -1; 79 if (stat(dev, &statb) < 0) { 80 printf("Can't stat %s: %s\n", dev, strerror(errno)); 81 return (0); 82 } 83 if (!S_ISCHR(statb.st_mode)) { 84 pfatal("%s is not a character device", dev); 85 if (reply("CONTINUE") == 0) 86 return (0); 87 } 88 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 89 printf("Can't open %s: %s\n", dev, strerror(errno)); 90 return (0); 91 } 92 if (preen == 0) 93 printf("** %s", dev); 94 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 95 fswritefd = -1; 96 if (preen) 97 pfatal("NO WRITE ACCESS"); 98 printf(" (NO WRITE)"); 99 } 100 if (preen == 0) 101 printf("\n"); 102 fsmodified = 0; 103 lfdir = 0; 104 initbarea(&sblk); 105 initbarea(&asblk); 106 sblk.b_un.b_buf = malloc(SBSIZE); 107 asblk.b_un.b_buf = malloc(SBSIZE); 108 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 109 errexit("cannot allocate space for superblock\n"); 110 if (lp = getdisklabel((char *)NULL, fsreadfd)) 111 dev_bsize = secsize = lp->d_secsize; 112 else 113 dev_bsize = secsize = DEV_BSIZE; 114 /* 115 * Read in the superblock, looking for alternates if necessary 116 */ 117 if (readsb(1) == 0) { 118 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 119 return(0); 120 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 121 return (0); 122 for (cg = 0; cg < proto.fs_ncg; cg++) { 123 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 124 if (readsb(0) != 0) 125 break; 126 } 127 if (cg >= proto.fs_ncg) { 128 printf("%s %s\n%s %s\n%s %s\n", 129 "SEARCH FOR ALTERNATE SUPER-BLOCK", 130 "FAILED. YOU MUST USE THE", 131 "-b OPTION TO FSCK TO SPECIFY THE", 132 "LOCATION OF AN ALTERNATE", 133 "SUPER-BLOCK TO SUPPLY NEEDED", 134 "INFORMATION; SEE fsck(8)."); 135 return(0); 136 } 137 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 138 } 139 maxfsblock = sblock.fs_size; 140 maxino = sblock.fs_ncg * sblock.fs_ipg; 141 /* 142 * Check and potentially fix certain fields in the super block. 143 */ 144 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 145 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 146 if (reply("SET TO DEFAULT") == 1) { 147 sblock.fs_optim = FS_OPTTIME; 148 sbdirty(); 149 } 150 } 151 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 152 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 153 sblock.fs_minfree); 154 if (reply("SET TO DEFAULT") == 1) { 155 sblock.fs_minfree = 10; 156 sbdirty(); 157 } 158 } 159 if (sblock.fs_interleave < 1 || 160 sblock.fs_interleave > sblock.fs_nsect) { 161 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 162 sblock.fs_interleave); 163 sblock.fs_interleave = 1; 164 if (preen) 165 printf(" (FIXED)\n"); 166 if (preen || reply("SET TO DEFAULT") == 1) { 167 sbdirty(); 168 dirty(&asblk); 169 } 170 } 171 if (sblock.fs_npsect < sblock.fs_nsect || 172 sblock.fs_npsect > sblock.fs_nsect*2) { 173 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 174 sblock.fs_npsect); 175 sblock.fs_npsect = sblock.fs_nsect; 176 if (preen) 177 printf(" (FIXED)\n"); 178 if (preen || reply("SET TO DEFAULT") == 1) { 179 sbdirty(); 180 dirty(&asblk); 181 } 182 } 183 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 184 newinofmt = 1; 185 } else { 186 sblock.fs_qbmask = ~sblock.fs_bmask; 187 sblock.fs_qfmask = ~sblock.fs_fmask; 188 newinofmt = 0; 189 } 190 /* 191 * Convert to new inode format. 192 */ 193 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 194 if (preen) 195 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 196 else if (!reply("CONVERT TO NEW INODE FORMAT")) 197 return(0); 198 doinglevel2++; 199 sblock.fs_inodefmt = FS_44INODEFMT; 200 sizepb = sblock.fs_bsize; 201 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 202 for (i = 0; i < NIADDR; i++) { 203 sizepb *= NINDIR(&sblock); 204 sblock.fs_maxfilesize += sizepb; 205 } 206 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 207 sblock.fs_qbmask = ~sblock.fs_bmask; 208 sblock.fs_qfmask = ~sblock.fs_fmask; 209 sbdirty(); 210 dirty(&asblk); 211 } 212 /* 213 * Convert to new cylinder group format. 214 */ 215 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 216 if (preen) 217 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 218 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 219 return(0); 220 doinglevel1++; 221 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 222 sblock.fs_nrpos = 8; 223 sblock.fs_postbloff = 224 (char *)(&sblock.fs_opostbl[0][0]) - 225 (char *)(&sblock.fs_unused_1); 226 sblock.fs_rotbloff = &sblock.fs_space[0] - 227 (u_char *)(&sblock.fs_unused_1); 228 sblock.fs_cgsize = 229 fragroundup(&sblock, CGSIZE(&sblock)); 230 sbdirty(); 231 dirty(&asblk); 232 } 233 if (asblk.b_dirty && !bflag) { 234 memcpy(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 235 flush(fswritefd, &asblk); 236 } 237 /* 238 * read in the summary info. 239 */ 240 asked = 0; 241 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 242 size = sblock.fs_cssize - i < sblock.fs_bsize ? 243 sblock.fs_cssize - i : sblock.fs_bsize; 244 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 245 if (bread(fsreadfd, (char *)sblock.fs_csp[j], 246 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 247 size) != 0 && !asked) { 248 pfatal("BAD SUMMARY INFORMATION"); 249 if (reply("CONTINUE") == 0) 250 errexit(""); 251 asked++; 252 } 253 } 254 /* 255 * allocate and initialize the necessary maps 256 */ 257 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 258 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 259 if (blockmap == NULL) { 260 printf("cannot alloc %u bytes for blockmap\n", 261 (unsigned)bmapsize); 262 goto badsblabel; 263 } 264 statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 265 if (statemap == NULL) { 266 printf("cannot alloc %u bytes for statemap\n", 267 (unsigned)(maxino + 1)); 268 goto badsblabel; 269 } 270 typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 271 if (typemap == NULL) { 272 printf("cannot alloc %u bytes for typemap\n", 273 (unsigned)(maxino + 1)); 274 goto badsblabel; 275 } 276 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 277 if (lncntp == NULL) { 278 printf("cannot alloc %u bytes for lncntp\n", 279 (unsigned)(maxino + 1) * sizeof(short)); 280 goto badsblabel; 281 } 282 numdirs = sblock.fs_cstotal.cs_ndir; 283 inplast = 0; 284 listmax = numdirs + 10; 285 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 286 sizeof(struct inoinfo *)); 287 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 288 sizeof(struct inoinfo *)); 289 if (inpsort == NULL || inphead == NULL) { 290 printf("cannot alloc %u bytes for inphead\n", 291 (unsigned)numdirs * sizeof(struct inoinfo *)); 292 goto badsblabel; 293 } 294 bufinit(); 295 return (1); 296 297 badsblabel: 298 ckfini(); 299 return (0); 300 } 301 302 /* 303 * Read in the super block and its summary info. 304 */ 305 int 306 readsb(listerr) 307 int listerr; 308 { 309 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 310 311 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 312 return (0); 313 sblk.b_bno = super; 314 sblk.b_size = SBSIZE; 315 /* 316 * run a few consistency checks of the super block 317 */ 318 if (sblock.fs_magic != FS_MAGIC) 319 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 320 if (sblock.fs_ncg < 1) 321 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 322 if (sblock.fs_cpg < 1) 323 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 324 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 325 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 326 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 327 if (sblock.fs_sbsize > SBSIZE) 328 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 329 /* 330 * Compute block size that the filesystem is based on, 331 * according to fsbtodb, and adjust superblock block number 332 * so we can tell if this is an alternate later. 333 */ 334 super *= dev_bsize; 335 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 336 sblk.b_bno = super / dev_bsize; 337 if (bflag) { 338 havesb = 1; 339 return (1); 340 } 341 /* 342 * Set all possible fields that could differ, then do check 343 * of whole super block against an alternate super block. 344 * When an alternate super-block is specified this check is skipped. 345 */ 346 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 347 if (asblk.b_errs) 348 return (0); 349 altsblock.fs_unused_1 = sblock.fs_unused_1; 350 altsblock.fs_unused_2 = sblock.fs_unused_2; 351 altsblock.fs_time = sblock.fs_time; 352 altsblock.fs_cstotal = sblock.fs_cstotal; 353 altsblock.fs_cgrotor = sblock.fs_cgrotor; 354 altsblock.fs_fmod = sblock.fs_fmod; 355 altsblock.fs_clean = sblock.fs_clean; 356 altsblock.fs_ronly = sblock.fs_ronly; 357 altsblock.fs_flags = sblock.fs_flags; 358 altsblock.fs_maxcontig = sblock.fs_maxcontig; 359 altsblock.fs_minfree = sblock.fs_minfree; 360 altsblock.fs_optim = sblock.fs_optim; 361 altsblock.fs_rotdelay = sblock.fs_rotdelay; 362 altsblock.fs_maxbpg = sblock.fs_maxbpg; 363 memcpy(altsblock.fs_csp, sblock.fs_csp, 364 sizeof sblock.fs_csp); 365 memcpy(altsblock.fs_fsmnt, sblock.fs_fsmnt, 366 sizeof sblock.fs_fsmnt); 367 memcpy(altsblock.fs_sparecon, sblock.fs_sparecon, 368 sizeof sblock.fs_sparecon); 369 /* 370 * The following should not have to be copied. 371 */ 372 altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 373 altsblock.fs_interleave = sblock.fs_interleave; 374 altsblock.fs_npsect = sblock.fs_npsect; 375 altsblock.fs_nrpos = sblock.fs_nrpos; 376 altsblock.fs_qbmask = sblock.fs_qbmask; 377 altsblock.fs_qfmask = sblock.fs_qfmask; 378 altsblock.fs_state = sblock.fs_state; 379 altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 380 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 381 badsb(listerr, 382 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 383 return (0); 384 } 385 havesb = 1; 386 return (1); 387 } 388 389 void 390 badsb(listerr, s) 391 int listerr; 392 char *s; 393 { 394 395 if (!listerr) 396 return; 397 if (preen) 398 printf("%s: ", cdevname); 399 pfatal("BAD SUPER BLOCK: %s\n", s); 400 } 401 402 /* 403 * Calculate a prototype superblock based on information in the disk label. 404 * When done the cgsblock macro can be calculated and the fs_ncg field 405 * can be used. Do NOT attempt to use other macros without verifying that 406 * their needed information is available! 407 */ 408 int 409 calcsb(dev, devfd, fs) 410 char *dev; 411 int devfd; 412 register struct fs *fs; 413 { 414 register struct disklabel *lp; 415 register struct partition *pp; 416 register char *cp; 417 int i; 418 419 cp = strchr(dev, '\0') - 1; 420 if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 421 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 422 return (0); 423 } 424 lp = getdisklabel(dev, devfd); 425 if (isdigit(*cp)) 426 pp = &lp->d_partitions[0]; 427 else 428 pp = &lp->d_partitions[*cp - 'a']; 429 if (pp->p_fstype != FS_BSDFFS) { 430 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 431 dev, pp->p_fstype < FSMAXTYPES ? 432 fstypenames[pp->p_fstype] : "unknown"); 433 return (0); 434 } 435 memset(fs, 0, sizeof(struct fs)); 436 fs->fs_fsize = pp->p_fsize; 437 fs->fs_frag = pp->p_frag; 438 fs->fs_cpg = pp->p_cpg; 439 fs->fs_size = pp->p_size; 440 fs->fs_ntrak = lp->d_ntracks; 441 fs->fs_nsect = lp->d_nsectors; 442 fs->fs_spc = lp->d_secpercyl; 443 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 444 fs->fs_sblkno = roundup( 445 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 446 fs->fs_frag); 447 fs->fs_cgmask = 0xffffffff; 448 for (i = fs->fs_ntrak; i > 1; i >>= 1) 449 fs->fs_cgmask <<= 1; 450 if (!POWEROF2(fs->fs_ntrak)) 451 fs->fs_cgmask <<= 1; 452 fs->fs_cgoffset = roundup( 453 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 454 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 455 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 456 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 457 fs->fs_fsbtodb++; 458 dev_bsize = lp->d_secsize; 459 return (1); 460 } 461 462 struct disklabel * 463 getdisklabel(s, fd) 464 char *s; 465 int fd; 466 { 467 static struct disklabel lab; 468 469 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 470 if (s == NULL) 471 return ((struct disklabel *)NULL); 472 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 473 errexit("%s: can't read disk label\n", s); 474 } 475 return (&lab); 476 } 477
Indexes created Thu Sep 25 16:09:42 GMT 2025