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 * @(#)setup.c 8.10 (Berkeley) 5/9/95 34 * $FreeBSD: src/sbin/fsck/setup.c,v 1.17.2.4 2002/06/24 05:10:41 dillon Exp $ 35 * $DragonFly: src/sbin/fsck/setup.c,v 1.2 2003/06/17 04:27:32 dillon Exp $ 36 */ 37 38 #define DKTYPENAMES 39 #include <sys/param.h> 40 #include <sys/stat.h> 41 #include <sys/disklabel.h> 42 #include <sys/file.h> 43 44 #include <ufs/ufs/dinode.h> 45 #include <ufs/ffs/fs.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <string.h> 51 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 static void badsb __P((int listerr, char *s)); 59 static int calcsb __P((char *dev, int devfd, struct fs *fs)); 60 static struct disklabel *getdisklabel __P((char *s, int fd)); 61 static int readsb __P((int listerr)); 62 63 /* 64 * Read in a superblock finding an alternate if necessary. 65 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 66 * is already clean (preen mode only). 67 */ 68 int 69 setup(dev) 70 char *dev; 71 { 72 long cg, size, asked, i, j; 73 long skipclean, bmapsize; 74 struct disklabel *lp; 75 off_t sizepb; 76 struct stat statb; 77 struct fs proto; 78 79 havesb = 0; 80 fswritefd = -1; 81 skipclean = fflag ? 0 : preen; 82 if (stat(dev, &statb) < 0) { 83 printf("Can't stat %s: %s\n", dev, strerror(errno)); 84 return (0); 85 } 86 if ((statb.st_mode & S_IFMT) != S_IFCHR && 87 (statb.st_mode & S_IFMT) != S_IFBLK) { 88 pfatal("%s is not a disk device", dev); 89 if (reply("CONTINUE") == 0) 90 return (0); 91 } 92 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 93 printf("Can't open %s: %s\n", dev, strerror(errno)); 94 return (0); 95 } 96 if (preen == 0) 97 printf("** %s", dev); 98 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 99 fswritefd = -1; 100 if (preen) 101 pfatal("NO WRITE ACCESS"); 102 printf(" (NO WRITE)"); 103 } 104 if (preen == 0) 105 printf("\n"); 106 fsmodified = 0; 107 lfdir = 0; 108 initbarea(&sblk); 109 initbarea(&asblk); 110 sblk.b_un.b_buf = malloc(SBSIZE); 111 asblk.b_un.b_buf = malloc(SBSIZE); 112 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 113 errx(EEXIT, "cannot allocate space for superblock"); 114 if ((lp = getdisklabel(NULL, fsreadfd))) 115 dev_bsize = secsize = lp->d_secsize; 116 else 117 dev_bsize = secsize = DEV_BSIZE; 118 /* 119 * Read in the superblock, looking for alternates if necessary 120 */ 121 if (readsb(1) == 0) { 122 skipclean = 0; 123 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 124 return(0); 125 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 126 return (0); 127 for (cg = 0; cg < proto.fs_ncg; cg++) { 128 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 129 if (readsb(0) != 0) 130 break; 131 } 132 if (cg >= proto.fs_ncg) { 133 printf("%s %s\n%s %s\n%s %s\n", 134 "SEARCH FOR ALTERNATE SUPER-BLOCK", 135 "FAILED. YOU MUST USE THE", 136 "-b OPTION TO FSCK TO SPECIFY THE", 137 "LOCATION OF AN ALTERNATE", 138 "SUPER-BLOCK TO SUPPLY NEEDED", 139 "INFORMATION; SEE fsck(8)."); 140 bflag = 0; 141 return(0); 142 } 143 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 144 bflag = 0; 145 } 146 if (skipclean && sblock.fs_clean) { 147 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 148 return (-1); 149 } 150 maxfsblock = sblock.fs_size; 151 maxino = sblock.fs_ncg * sblock.fs_ipg; 152 /* 153 * Check and potentially fix certain fields in the super block. 154 */ 155 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 156 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 157 if (reply("SET TO DEFAULT") == 1) { 158 sblock.fs_optim = FS_OPTTIME; 159 sbdirty(); 160 } 161 } 162 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 163 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 164 sblock.fs_minfree); 165 if (reply("SET TO DEFAULT") == 1) { 166 sblock.fs_minfree = 10; 167 sbdirty(); 168 } 169 } 170 if (sblock.fs_interleave < 1 || 171 sblock.fs_interleave > sblock.fs_nsect) { 172 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 173 sblock.fs_interleave); 174 sblock.fs_interleave = 1; 175 if (preen) 176 printf(" (FIXED)\n"); 177 if (preen || reply("SET TO DEFAULT") == 1) { 178 sbdirty(); 179 dirty(&asblk); 180 } 181 } 182 if (sblock.fs_npsect < sblock.fs_nsect || 183 sblock.fs_npsect > sblock.fs_nsect*2) { 184 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 185 sblock.fs_npsect); 186 sblock.fs_npsect = sblock.fs_nsect; 187 if (preen) 188 printf(" (FIXED)\n"); 189 if (preen || reply("SET TO DEFAULT") == 1) { 190 sbdirty(); 191 dirty(&asblk); 192 } 193 } 194 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 195 newinofmt = 1; 196 } else { 197 sblock.fs_qbmask = ~sblock.fs_bmask; 198 sblock.fs_qfmask = ~sblock.fs_fmask; 199 /* This should match the kernel limit in ffs_oldfscompat(). */ 200 sblock.fs_maxfilesize = (u_int64_t)1 << 39; 201 newinofmt = 0; 202 } 203 /* 204 * Convert to new inode format. 205 */ 206 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 207 if (preen) 208 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 209 else if (!reply("CONVERT TO NEW INODE FORMAT")) 210 return(0); 211 doinglevel2++; 212 sblock.fs_inodefmt = FS_44INODEFMT; 213 sizepb = sblock.fs_bsize; 214 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 215 for (i = 0; i < NIADDR; i++) { 216 sizepb *= NINDIR(&sblock); 217 sblock.fs_maxfilesize += sizepb; 218 } 219 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 220 sblock.fs_qbmask = ~sblock.fs_bmask; 221 sblock.fs_qfmask = ~sblock.fs_fmask; 222 sbdirty(); 223 dirty(&asblk); 224 } 225 /* 226 * Convert to new cylinder group format. 227 */ 228 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 229 if (preen) 230 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 231 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 232 return(0); 233 doinglevel1++; 234 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 235 sblock.fs_nrpos = 8; 236 sblock.fs_postbloff = 237 (char *)(&sblock.fs_opostbl[0][0]) - 238 (char *)(&sblock.fs_firstfield); 239 sblock.fs_rotbloff = &sblock.fs_space[0] - 240 (u_char *)(&sblock.fs_firstfield); 241 sblock.fs_cgsize = 242 fragroundup(&sblock, CGSIZE(&sblock)); 243 sbdirty(); 244 dirty(&asblk); 245 } 246 if (asblk.b_dirty && !bflag) { 247 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 248 flush(fswritefd, &asblk); 249 } 250 /* 251 * read in the summary info. 252 */ 253 asked = 0; 254 sblock.fs_csp = calloc(1, sblock.fs_cssize); 255 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 256 size = sblock.fs_cssize - i < sblock.fs_bsize ? 257 sblock.fs_cssize - i : sblock.fs_bsize; 258 if (bread(fsreadfd, (char *)sblock.fs_csp + i, 259 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 260 size) != 0 && !asked) { 261 pfatal("BAD SUMMARY INFORMATION"); 262 if (reply("CONTINUE") == 0) { 263 ckfini(0); 264 exit(EEXIT); 265 } 266 asked++; 267 } 268 } 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 inostathead = calloc((unsigned)(sblock.fs_ncg), 280 sizeof(struct inostatlist)); 281 if (inostathead == NULL) { 282 printf("cannot alloc %u bytes for inostathead\n", 283 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 284 goto badsb; 285 } 286 numdirs = sblock.fs_cstotal.cs_ndir; 287 dirhash = numdirs; 288 if (numdirs == 0) { 289 printf("numdirs is zero, try using an alternate superblock\n"); 290 goto badsb; 291 } 292 inplast = 0; 293 listmax = numdirs + 10; 294 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 295 sizeof(struct inoinfo *)); 296 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 297 sizeof(struct inoinfo *)); 298 if (inpsort == NULL || inphead == NULL) { 299 printf("cannot alloc %u bytes for inphead\n", 300 (unsigned)numdirs * sizeof(struct inoinfo *)); 301 goto badsb; 302 } 303 bufinit(); 304 if (sblock.fs_flags & FS_DOSOFTDEP) 305 usedsoftdep = 1; 306 else 307 usedsoftdep = 0; 308 return (1); 309 310 badsb: 311 ckfini(0); 312 return (0); 313 } 314 315 /* 316 * Read in the super block and its summary info. 317 */ 318 static int 319 readsb(listerr) 320 int listerr; 321 { 322 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 323 324 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 325 return (0); 326 sblk.b_bno = super; 327 sblk.b_size = SBSIZE; 328 /* 329 * run a few consistency checks of the super block 330 */ 331 if (sblock.fs_magic != FS_MAGIC) 332 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 333 if (sblock.fs_ncg < 1) 334 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 335 if (sblock.fs_cpg < 1) 336 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 337 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 338 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 339 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 340 if (sblock.fs_sbsize > SBSIZE) 341 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 342 /* 343 * Compute block size that the filesystem is based on, 344 * according to fsbtodb, and adjust superblock block number 345 * so we can tell if this is an alternate later. 346 */ 347 super *= dev_bsize; 348 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 349 sblk.b_bno = super / dev_bsize; 350 if (bflag) { 351 havesb = 1; 352 return (1); 353 } 354 /* 355 * Compare all fields that should not differ in alternate super block. 356 * When an alternate super-block is specified this check is skipped. 357 */ 358 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 359 if (asblk.b_errs) 360 return (0); 361 if (altsblock.fs_sblkno != sblock.fs_sblkno || 362 altsblock.fs_cblkno != sblock.fs_cblkno || 363 altsblock.fs_iblkno != sblock.fs_iblkno || 364 altsblock.fs_dblkno != sblock.fs_dblkno || 365 altsblock.fs_cgoffset != sblock.fs_cgoffset || 366 altsblock.fs_cgmask != sblock.fs_cgmask || 367 altsblock.fs_ncg != sblock.fs_ncg || 368 altsblock.fs_bsize != sblock.fs_bsize || 369 altsblock.fs_fsize != sblock.fs_fsize || 370 altsblock.fs_frag != sblock.fs_frag || 371 altsblock.fs_bmask != sblock.fs_bmask || 372 altsblock.fs_fmask != sblock.fs_fmask || 373 altsblock.fs_bshift != sblock.fs_bshift || 374 altsblock.fs_fshift != sblock.fs_fshift || 375 altsblock.fs_fragshift != sblock.fs_fragshift || 376 altsblock.fs_fsbtodb != sblock.fs_fsbtodb || 377 altsblock.fs_sbsize != sblock.fs_sbsize || 378 altsblock.fs_nindir != sblock.fs_nindir || 379 altsblock.fs_inopb != sblock.fs_inopb || 380 altsblock.fs_cssize != sblock.fs_cssize || 381 altsblock.fs_cpg != sblock.fs_cpg || 382 altsblock.fs_ipg != sblock.fs_ipg || 383 altsblock.fs_fpg != sblock.fs_fpg || 384 altsblock.fs_magic != sblock.fs_magic) { 385 badsb(listerr, 386 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 387 return (0); 388 } 389 havesb = 1; 390 return (1); 391 } 392 393 static void 394 badsb(listerr, s) 395 int listerr; 396 char *s; 397 { 398 399 if (!listerr) 400 return; 401 if (preen) 402 printf("%s: ", cdevname); 403 pfatal("BAD SUPER BLOCK: %s\n", s); 404 } 405 406 /* 407 * Calculate a prototype superblock based on information in the disk label. 408 * When done the cgsblock macro can be calculated and the fs_ncg field 409 * can be used. Do NOT attempt to use other macros without verifying that 410 * their needed information is available! 411 */ 412 static int 413 calcsb(dev, devfd, fs) 414 char *dev; 415 int devfd; 416 register struct fs *fs; 417 { 418 register struct disklabel *lp; 419 register struct partition *pp; 420 register char *cp; 421 int i; 422 423 cp = strchr(dev, '\0') - 1; 424 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 425 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 426 return (0); 427 } 428 lp = getdisklabel(dev, devfd); 429 if (isdigit(*cp)) 430 pp = &lp->d_partitions[0]; 431 else 432 pp = &lp->d_partitions[*cp - 'a']; 433 if (pp->p_fstype != FS_BSDFFS) { 434 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 435 dev, pp->p_fstype < FSMAXTYPES ? 436 fstypenames[pp->p_fstype] : "unknown"); 437 return (0); 438 } 439 if (pp->p_fsize == 0 || pp->p_frag == 0 || 440 pp->p_cpg == 0 || pp->p_size == 0) { 441 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 442 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 443 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 444 return (0); 445 } 446 memset(fs, 0, sizeof(struct fs)); 447 fs->fs_fsize = pp->p_fsize; 448 fs->fs_frag = pp->p_frag; 449 fs->fs_cpg = pp->p_cpg; 450 fs->fs_size = pp->p_size; 451 fs->fs_ntrak = lp->d_ntracks; 452 fs->fs_nsect = lp->d_nsectors; 453 fs->fs_spc = lp->d_secpercyl; 454 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 455 fs->fs_sblkno = roundup( 456 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 457 fs->fs_frag); 458 fs->fs_cgmask = 0xffffffff; 459 for (i = fs->fs_ntrak; i > 1; i >>= 1) 460 fs->fs_cgmask <<= 1; 461 if (!POWEROF2(fs->fs_ntrak)) 462 fs->fs_cgmask <<= 1; 463 fs->fs_cgoffset = roundup( 464 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 465 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 466 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 467 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 468 fs->fs_fsbtodb++; 469 dev_bsize = lp->d_secsize; 470 return (1); 471 } 472 473 static struct disklabel * 474 getdisklabel(s, fd) 475 char *s; 476 int fd; 477 { 478 static struct disklabel lab; 479 480 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 481 if (s == NULL) 482 return ((struct disklabel *)NULL); 483 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 484 errx(EEXIT, "%s: can't read disk label", s); 485 } 486 return (&lab); 487 } 488