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 1.5 2003/11/01 17:15:58 drhodus 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 <vfs/ufs/dinode.h> 45 #include <vfs/ufs/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(int listerr, char *s); 59 static int calcsb(char *dev, int devfd, struct fs *fs); 60 static struct disklabel *getdisklabel(char *s, int fd); 61 static int readsb(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(char *dev) 70 { 71 long cg, size, asked, i, j; 72 long skipclean, bmapsize; 73 struct disklabel *lp; 74 off_t sizepb; 75 struct stat statb; 76 struct fs proto; 77 78 havesb = 0; 79 fswritefd = -1; 80 skipclean = fflag ? 0 : preen; 81 if (stat(dev, &statb) < 0) { 82 printf("Can't stat %s: %s\n", dev, strerror(errno)); 83 return (0); 84 } 85 if ((statb.st_mode & S_IFMT) != S_IFCHR && 86 (statb.st_mode & S_IFMT) != S_IFBLK) { 87 pfatal("%s is not a disk device", dev); 88 if (reply("CONTINUE") == 0) 89 return (0); 90 } 91 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 92 printf("Can't open %s: %s\n", dev, strerror(errno)); 93 return (0); 94 } 95 if (preen == 0) 96 printf("** %s", dev); 97 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 98 fswritefd = -1; 99 if (preen) 100 pfatal("NO WRITE ACCESS"); 101 printf(" (NO WRITE)"); 102 } 103 if (preen == 0) 104 printf("\n"); 105 fsmodified = 0; 106 lfdir = 0; 107 initbarea(&sblk); 108 initbarea(&asblk); 109 sblk.b_un.b_buf = malloc(SBSIZE); 110 asblk.b_un.b_buf = malloc(SBSIZE); 111 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 112 errx(EEXIT, "cannot allocate space for superblock"); 113 if ((lp = getdisklabel(NULL, fsreadfd))) 114 dev_bsize = secsize = lp->d_secsize; 115 else 116 dev_bsize = secsize = DEV_BSIZE; 117 /* 118 * Read in the superblock, looking for alternates if necessary 119 */ 120 if (readsb(1) == 0) { 121 skipclean = 0; 122 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 123 return(0); 124 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 125 return (0); 126 for (cg = 0; cg < proto.fs_ncg; cg++) { 127 bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 128 if (readsb(0) != 0) 129 break; 130 } 131 if (cg >= proto.fs_ncg) { 132 printf("%s %s\n%s %s\n%s %s\n", 133 "SEARCH FOR ALTERNATE SUPER-BLOCK", 134 "FAILED. YOU MUST USE THE", 135 "-b OPTION TO FSCK TO SPECIFY THE", 136 "LOCATION OF AN ALTERNATE", 137 "SUPER-BLOCK TO SUPPLY NEEDED", 138 "INFORMATION; SEE fsck(8)."); 139 bflag = 0; 140 return(0); 141 } 142 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 143 bflag = 0; 144 } 145 if (skipclean && sblock.fs_clean) { 146 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 147 return (-1); 148 } 149 maxfsblock = sblock.fs_size; 150 maxino = sblock.fs_ncg * sblock.fs_ipg; 151 /* 152 * Check and potentially fix certain fields in the super block. 153 */ 154 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 155 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 156 if (reply("SET TO DEFAULT") == 1) { 157 sblock.fs_optim = FS_OPTTIME; 158 sbdirty(); 159 } 160 } 161 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 162 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 163 sblock.fs_minfree); 164 if (reply("SET TO DEFAULT") == 1) { 165 sblock.fs_minfree = 10; 166 sbdirty(); 167 } 168 } 169 if (sblock.fs_interleave < 1 || 170 sblock.fs_interleave > sblock.fs_nsect) { 171 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 172 sblock.fs_interleave); 173 sblock.fs_interleave = 1; 174 if (preen) 175 printf(" (FIXED)\n"); 176 if (preen || reply("SET TO DEFAULT") == 1) { 177 sbdirty(); 178 dirty(&asblk); 179 } 180 } 181 if (sblock.fs_npsect < sblock.fs_nsect || 182 sblock.fs_npsect > sblock.fs_nsect*2) { 183 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 184 sblock.fs_npsect); 185 sblock.fs_npsect = sblock.fs_nsect; 186 if (preen) 187 printf(" (FIXED)\n"); 188 if (preen || reply("SET TO DEFAULT") == 1) { 189 sbdirty(); 190 dirty(&asblk); 191 } 192 } 193 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 194 newinofmt = 1; 195 } else { 196 sblock.fs_qbmask = ~sblock.fs_bmask; 197 sblock.fs_qfmask = ~sblock.fs_fmask; 198 /* This should match the kernel limit in ffs_oldfscompat(). */ 199 sblock.fs_maxfilesize = (u_int64_t)1 << 39; 200 newinofmt = 0; 201 } 202 /* 203 * Convert to new inode format. 204 */ 205 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 206 if (preen) 207 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 208 else if (!reply("CONVERT TO NEW INODE FORMAT")) 209 return(0); 210 doinglevel2++; 211 sblock.fs_inodefmt = FS_44INODEFMT; 212 sizepb = sblock.fs_bsize; 213 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 214 for (i = 0; i < NIADDR; i++) { 215 sizepb *= NINDIR(&sblock); 216 sblock.fs_maxfilesize += sizepb; 217 } 218 sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 219 sblock.fs_qbmask = ~sblock.fs_bmask; 220 sblock.fs_qfmask = ~sblock.fs_fmask; 221 sbdirty(); 222 dirty(&asblk); 223 } 224 /* 225 * Convert to new cylinder group format. 226 */ 227 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 228 if (preen) 229 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 230 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 231 return(0); 232 doinglevel1++; 233 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 234 sblock.fs_nrpos = 8; 235 sblock.fs_postbloff = 236 (char *)(&sblock.fs_opostbl[0][0]) - 237 (char *)(&sblock.fs_firstfield); 238 sblock.fs_rotbloff = &sblock.fs_space[0] - 239 (u_char *)(&sblock.fs_firstfield); 240 sblock.fs_cgsize = 241 fragroundup(&sblock, CGSIZE(&sblock)); 242 sbdirty(); 243 dirty(&asblk); 244 } 245 if (asblk.b_dirty && !bflag) { 246 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 247 flush(fswritefd, &asblk); 248 } 249 /* 250 * read in the summary info. 251 */ 252 asked = 0; 253 sblock.fs_csp = calloc(1, sblock.fs_cssize); 254 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 255 size = sblock.fs_cssize - i < sblock.fs_bsize ? 256 sblock.fs_cssize - i : sblock.fs_bsize; 257 if (bread(fsreadfd, (char *)sblock.fs_csp + i, 258 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 259 size) != 0 && !asked) { 260 pfatal("BAD SUMMARY INFORMATION"); 261 if (reply("CONTINUE") == 0) { 262 ckfini(0); 263 exit(EEXIT); 264 } 265 asked++; 266 } 267 } 268 /* 269 * allocate and initialize the necessary maps 270 */ 271 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 272 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 273 if (blockmap == NULL) { 274 printf("cannot alloc %u bytes for blockmap\n", 275 (unsigned)bmapsize); 276 goto badsb; 277 } 278 inostathead = calloc((unsigned)(sblock.fs_ncg), 279 sizeof(struct inostatlist)); 280 if (inostathead == NULL) { 281 printf("cannot alloc %u bytes for inostathead\n", 282 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 283 goto badsb; 284 } 285 numdirs = sblock.fs_cstotal.cs_ndir; 286 dirhash = numdirs; 287 if (numdirs == 0) { 288 printf("numdirs is zero, try using an alternate superblock\n"); 289 goto badsb; 290 } 291 inplast = 0; 292 listmax = numdirs + 10; 293 inpsort = (struct inoinfo **)calloc((unsigned)listmax, 294 sizeof(struct inoinfo *)); 295 inphead = (struct inoinfo **)calloc((unsigned)numdirs, 296 sizeof(struct inoinfo *)); 297 if (inpsort == NULL || inphead == NULL) { 298 printf("cannot alloc %u bytes for inphead\n", 299 (unsigned)numdirs * sizeof(struct inoinfo *)); 300 goto badsb; 301 } 302 bufinit(); 303 if (sblock.fs_flags & FS_DOSOFTDEP) 304 usedsoftdep = 1; 305 else 306 usedsoftdep = 0; 307 return (1); 308 309 badsb: 310 ckfini(0); 311 return (0); 312 } 313 314 /* 315 * Read in the super block and its summary info. 316 */ 317 static int 318 readsb(int listerr) 319 { 320 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 321 322 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 323 return (0); 324 sblk.b_bno = super; 325 sblk.b_size = SBSIZE; 326 /* 327 * run a few consistency checks of the super block 328 */ 329 if (sblock.fs_magic != FS_MAGIC) 330 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 331 if (sblock.fs_ncg < 1) 332 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 333 if (sblock.fs_cpg < 1) 334 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 335 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 336 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 337 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 338 if (sblock.fs_sbsize > SBSIZE) 339 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 340 /* 341 * Compute block size that the filesystem is based on, 342 * according to fsbtodb, and adjust superblock block number 343 * so we can tell if this is an alternate later. 344 */ 345 super *= dev_bsize; 346 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 347 sblk.b_bno = super / dev_bsize; 348 if (bflag) { 349 havesb = 1; 350 return (1); 351 } 352 /* 353 * Compare all fields that should not differ in alternate super block. 354 * When an alternate super-block is specified this check is skipped. 355 */ 356 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 357 if (asblk.b_errs) 358 return (0); 359 if (altsblock.fs_sblkno != sblock.fs_sblkno || 360 altsblock.fs_cblkno != sblock.fs_cblkno || 361 altsblock.fs_iblkno != sblock.fs_iblkno || 362 altsblock.fs_dblkno != sblock.fs_dblkno || 363 altsblock.fs_cgoffset != sblock.fs_cgoffset || 364 altsblock.fs_cgmask != sblock.fs_cgmask || 365 altsblock.fs_ncg != sblock.fs_ncg || 366 altsblock.fs_bsize != sblock.fs_bsize || 367 altsblock.fs_fsize != sblock.fs_fsize || 368 altsblock.fs_frag != sblock.fs_frag || 369 altsblock.fs_bmask != sblock.fs_bmask || 370 altsblock.fs_fmask != sblock.fs_fmask || 371 altsblock.fs_bshift != sblock.fs_bshift || 372 altsblock.fs_fshift != sblock.fs_fshift || 373 altsblock.fs_fragshift != sblock.fs_fragshift || 374 altsblock.fs_fsbtodb != sblock.fs_fsbtodb || 375 altsblock.fs_sbsize != sblock.fs_sbsize || 376 altsblock.fs_nindir != sblock.fs_nindir || 377 altsblock.fs_inopb != sblock.fs_inopb || 378 altsblock.fs_cssize != sblock.fs_cssize || 379 altsblock.fs_cpg != sblock.fs_cpg || 380 altsblock.fs_ipg != sblock.fs_ipg || 381 altsblock.fs_fpg != sblock.fs_fpg || 382 altsblock.fs_magic != sblock.fs_magic) { 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 } 390 391 static void 392 badsb(int listerr, 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 static int 409 calcsb(char *dev, int devfd, register struct fs *fs) 410 { 411 register struct disklabel *lp; 412 register struct partition *pp; 413 register char *cp; 414 int i; 415 416 cp = strchr(dev, '\0') - 1; 417 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 418 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 419 return (0); 420 } 421 lp = getdisklabel(dev, devfd); 422 if (isdigit(*cp)) 423 pp = &lp->d_partitions[0]; 424 else 425 pp = &lp->d_partitions[*cp - 'a']; 426 if (pp->p_fstype != FS_BSDFFS) { 427 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 428 dev, pp->p_fstype < FSMAXTYPES ? 429 fstypenames[pp->p_fstype] : "unknown"); 430 return (0); 431 } 432 if (pp->p_fsize == 0 || pp->p_frag == 0 || 433 pp->p_cpg == 0 || pp->p_size == 0) { 434 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 435 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 436 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 437 return (0); 438 } 439 memset(fs, 0, sizeof(struct fs)); 440 fs->fs_fsize = pp->p_fsize; 441 fs->fs_frag = pp->p_frag; 442 fs->fs_cpg = pp->p_cpg; 443 fs->fs_size = pp->p_size; 444 fs->fs_ntrak = lp->d_ntracks; 445 fs->fs_nsect = lp->d_nsectors; 446 fs->fs_spc = lp->d_secpercyl; 447 fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 448 fs->fs_sblkno = roundup( 449 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 450 fs->fs_frag); 451 fs->fs_cgmask = 0xffffffff; 452 for (i = fs->fs_ntrak; i > 1; i >>= 1) 453 fs->fs_cgmask <<= 1; 454 if (!POWEROF2(fs->fs_ntrak)) 455 fs->fs_cgmask <<= 1; 456 fs->fs_cgoffset = roundup( 457 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 458 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 459 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 460 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 461 fs->fs_fsbtodb++; 462 dev_bsize = lp->d_secsize; 463 return (1); 464 } 465 466 static struct disklabel * 467 getdisklabel(char *s, 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 errx(EEXIT, "%s: can't read disk label", s); 476 } 477 return (&lab); 478 } 479