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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)setup.c 8.10 (Berkeley) 5/9/95 30 * $FreeBSD: src/sbin/fsck/setup.c,v 1.17.2.4 2002/06/24 05:10:41 dillon Exp $ 31 */ 32 33 #define DKTYPENAMES 34 #include <sys/param.h> 35 #include <sys/stat.h> 36 #include <sys/diskslice.h> 37 38 #include <vfs/ufs/dinode.h> 39 #include <vfs/ufs/fs.h> 40 41 #include <ctype.h> 42 #include <err.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <string.h> 46 47 #include "fsck.h" 48 49 struct bufarea sblk; /* file system superblock */ 50 struct inoinfo **inphead, **inpsort; /* Inode cache data structures. */ 51 long numdirs, dirhash, listmax, inplast, dirhashmask; 52 long dev_bsize; /* computed value of DEV_BSIZE */ 53 long secsize; /* actual disk sector size */ 54 char fflag; /* force check, ignore clean flag */ 55 int bflag; /* location of alternate super block */ 56 int cvtlevel; /* convert to newer file system format */ 57 int doinglevel1; /* converting to new cylinder group format */ 58 int doinglevel2; /* converting to new inode format */ 59 char usedsoftdep; /* just fix soft dependency inconsistencies */ 60 char havesb; /* superblock has been read */ 61 int fsreadfd; /* file descriptor for reading file system */ 62 int fswritefd; /* file descriptor for writing file system */ 63 ufs_daddr_t maxfsblock; /* number of blocks in the file system */ 64 char *blockmap; /* ptr to primary blk allocation map */ 65 ufs1_ino_t maxino; /* number of inodes in file system */ 66 67 68 struct bufarea asblk; 69 #define altsblock (*asblk.b_un.b_fs) 70 71 static void badsb(int listerr, char *s); 72 static int readsb(int listerr); 73 74 /* 75 * Read in a superblock finding an alternate if necessary. 76 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 77 * is already clean (preen mode only). 78 */ 79 int 80 setup(char *dev) 81 { 82 long size, asked, i, j; 83 long skipclean, bmapsize; 84 off_t sizepb; 85 struct stat statb; 86 87 havesb = 0; 88 fswritefd = -1; 89 skipclean = fflag ? 0 : preen; 90 if (stat(dev, &statb) < 0) { 91 printf("Can't stat %s: %s\n", dev, strerror(errno)); 92 return (0); 93 } 94 if ((statb.st_mode & S_IFMT) != S_IFCHR && 95 (statb.st_mode & S_IFMT) != S_IFBLK) { 96 pfatal("%s is not a disk device", dev); 97 if (reply("CONTINUE") == 0) 98 return (0); 99 } 100 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 101 printf("Can't open %s: %s\n", dev, strerror(errno)); 102 return (0); 103 } 104 if (preen == 0) 105 printf("** %s", dev); 106 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 107 fswritefd = -1; 108 if (preen) 109 pfatal("NO WRITE ACCESS"); 110 printf(" (NO WRITE)"); 111 } 112 if (preen == 0) 113 printf("\n"); 114 fsmodified = 0; 115 lfdir = 0; 116 initbarea(&sblk); 117 initbarea(&asblk); 118 sblk.b_un.b_buf = malloc(SBSIZE); 119 asblk.b_un.b_buf = malloc(SBSIZE); 120 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 121 errx(EEXIT, "cannot allocate space for superblock"); 122 123 /* 124 * Figure out the device block size and the sector size. The 125 * block size is updated by readsb() later on. 126 */ 127 { 128 struct partinfo pinfo; 129 130 if (ioctl(fsreadfd, DIOCGPART, &pinfo) == 0) { 131 dev_bsize = secsize = pinfo.media_blksize; 132 } else { 133 dev_bsize = secsize = DEV_BSIZE; 134 } 135 } 136 137 /* 138 * Read in the superblock, looking for alternates if necessary 139 */ 140 if (readsb(1) == 0) { 141 skipclean = 0; 142 if (bflag || preen) 143 return(0); 144 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 145 return (0); 146 bflag = 32; 147 if (readsb(0) == 0) { 148 printf( 149 "YOU MUST USE THE -b OPTION TO FSCK TO SPECIFY\n" 150 "THE LOCATION OF AN ALTERNATE SUPER-BLOCK TO\n" 151 "SUPPLY NEEDED INFORMATION; SEE fsck(8)."); 152 bflag = 0; 153 return(0); 154 } 155 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 156 bflag = 0; 157 } 158 if (skipclean && sblock.fs_clean) { 159 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 160 return (-1); 161 } 162 maxfsblock = sblock.fs_size; 163 maxino = sblock.fs_ncg * sblock.fs_ipg; 164 /* 165 * Check and potentially fix certain fields in the super block. 166 */ 167 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 168 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 169 if (reply("SET TO DEFAULT") == 1) { 170 sblock.fs_optim = FS_OPTTIME; 171 sbdirty(); 172 } 173 } 174 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 175 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 176 sblock.fs_minfree); 177 if (reply("SET TO DEFAULT") == 1) { 178 sblock.fs_minfree = 10; 179 sbdirty(); 180 } 181 } 182 if (sblock.fs_interleave < 1 || 183 sblock.fs_interleave > sblock.fs_nsect) { 184 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 185 sblock.fs_interleave); 186 sblock.fs_interleave = 1; 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_npsect < sblock.fs_nsect || 195 sblock.fs_npsect > sblock.fs_nsect*2) { 196 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 197 sblock.fs_npsect); 198 sblock.fs_npsect = sblock.fs_nsect; 199 if (preen) 200 printf(" (FIXED)\n"); 201 if (preen || reply("SET TO DEFAULT") == 1) { 202 sbdirty(); 203 dirty(&asblk); 204 } 205 } 206 if (sblock.fs_inodefmt >= FS_44INODEFMT) { 207 newinofmt = 1; 208 } else { 209 sblock.fs_qbmask = ~sblock.fs_bmask; 210 sblock.fs_qfmask = ~sblock.fs_fmask; 211 /* This should match the kernel limit in ffs_oldfscompat(). */ 212 sblock.fs_maxfilesize = (u_int64_t)1 << 39; 213 newinofmt = 0; 214 } 215 /* 216 * Convert to new inode format. 217 */ 218 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 219 if (preen) 220 pwarn("CONVERTING TO NEW INODE FORMAT\n"); 221 else if (!reply("CONVERT TO NEW INODE FORMAT")) 222 return(0); 223 doinglevel2++; 224 sblock.fs_inodefmt = FS_44INODEFMT; 225 sizepb = sblock.fs_bsize; 226 sblock.fs_maxfilesize = sblock.fs_bsize * UFS_NDADDR - 1; 227 for (i = 0; i < UFS_NIADDR; i++) { 228 sizepb *= NINDIR(&sblock); 229 sblock.fs_maxfilesize += sizepb; 230 } 231 sblock.fs_maxsymlinklen = UFS1_MAXSYMLINKLEN; 232 sblock.fs_qbmask = ~sblock.fs_bmask; 233 sblock.fs_qfmask = ~sblock.fs_fmask; 234 sbdirty(); 235 dirty(&asblk); 236 } 237 /* 238 * Convert to new cylinder group format. 239 */ 240 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 241 if (preen) 242 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 243 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 244 return(0); 245 doinglevel1++; 246 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 247 sblock.fs_nrpos = 8; 248 sblock.fs_postbloff = 249 (char *)(&sblock.fs_opostbl[0][0]) - 250 (char *)(&sblock.fs_firstfield); 251 sblock.fs_rotbloff = &sblock.fs_space[0] - 252 (u_char *)(&sblock.fs_firstfield); 253 sblock.fs_cgsize = 254 fragroundup(&sblock, CGSIZE(&sblock)); 255 sbdirty(); 256 dirty(&asblk); 257 } 258 if (asblk.b_dirty && !bflag) { 259 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 260 flush(fswritefd, &asblk); 261 } 262 /* 263 * read in the summary info. 264 */ 265 asked = 0; 266 sblock.fs_csp = calloc(1, sblock.fs_cssize); 267 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 268 size = sblock.fs_cssize - i < sblock.fs_bsize ? 269 sblock.fs_cssize - i : sblock.fs_bsize; 270 if (bread(fsreadfd, (char *)sblock.fs_csp + i, 271 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 272 size) != 0 && !asked) { 273 pfatal("BAD SUMMARY INFORMATION"); 274 if (reply("CONTINUE") == 0) { 275 ckfini(0); 276 exit(EEXIT); 277 } 278 asked++; 279 } 280 } 281 /* 282 * allocate and initialize the necessary maps 283 */ 284 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 285 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 286 if (blockmap == NULL) { 287 printf("cannot alloc %u bytes for blockmap\n", 288 (unsigned)bmapsize); 289 goto badsb; 290 } 291 inostathead = calloc((unsigned)(sblock.fs_ncg), 292 sizeof(struct inostatlist)); 293 if (inostathead == NULL) { 294 printf("cannot alloc %u bytes for inostathead\n", 295 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 296 goto badsb; 297 } 298 numdirs = sblock.fs_cstotal.cs_ndir; 299 300 /* 301 * Calculate the directory hash table size. Do not allocate 302 * a ridiculous amount of memory if we have a lot of directories. 303 */ 304 for (dirhash = 16; dirhash < numdirs; dirhash <<= 1) 305 ; 306 if (dirhash > 1024*1024) 307 dirhash /= 8; 308 dirhashmask = dirhash - 1; 309 310 if (numdirs == 0) { 311 printf("numdirs is zero, try using an alternate superblock\n"); 312 goto badsb; 313 } 314 inplast = 0; 315 listmax = numdirs + 10; 316 inpsort = calloc((unsigned)listmax, sizeof(struct inoinfo *)); 317 inphead = calloc((unsigned)dirhash, sizeof(struct inoinfo *)); 318 if (inpsort == NULL || inphead == NULL) { 319 printf("cannot allocate base structures for %ld directories\n", 320 numdirs); 321 goto badsb; 322 } 323 bufinit(); 324 if (sblock.fs_flags & FS_DOSOFTDEP) 325 usedsoftdep = 1; 326 else 327 usedsoftdep = 0; 328 return (1); 329 330 badsb: 331 ckfini(0); 332 return (0); 333 } 334 335 /* 336 * Read in the super block and its summary info. 337 */ 338 static int 339 readsb(int listerr) 340 { 341 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 342 343 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 344 return (0); 345 sblk.b_bno = super; 346 sblk.b_size = SBSIZE; 347 /* 348 * run a few consistency checks of the super block 349 */ 350 if (sblock.fs_magic != FS_MAGIC) 351 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 352 if (sblock.fs_ncg < 1) 353 { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 354 if (sblock.fs_cpg < 1) 355 { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 356 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 357 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 358 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 359 if (sblock.fs_sbsize > SBSIZE) 360 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 361 /* 362 * Compute block size that the filesystem is based on, 363 * according to fsbtodb, and adjust superblock block number 364 * so we can tell if this is an alternate later. 365 */ 366 super *= dev_bsize; 367 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 368 sblk.b_bno = super / dev_bsize; 369 if (bflag) { 370 havesb = 1; 371 return (1); 372 } 373 /* 374 * Compare all fields that should not differ in alternate super block. 375 * When an alternate super-block is specified this check is skipped. 376 */ 377 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 378 if (asblk.b_errs) 379 return (0); 380 if (altsblock.fs_sblkno != sblock.fs_sblkno || 381 altsblock.fs_cblkno != sblock.fs_cblkno || 382 altsblock.fs_iblkno != sblock.fs_iblkno || 383 altsblock.fs_dblkno != sblock.fs_dblkno || 384 altsblock.fs_cgoffset != sblock.fs_cgoffset || 385 altsblock.fs_cgmask != sblock.fs_cgmask || 386 altsblock.fs_ncg != sblock.fs_ncg || 387 altsblock.fs_bsize != sblock.fs_bsize || 388 altsblock.fs_fsize != sblock.fs_fsize || 389 altsblock.fs_frag != sblock.fs_frag || 390 altsblock.fs_bmask != sblock.fs_bmask || 391 altsblock.fs_fmask != sblock.fs_fmask || 392 altsblock.fs_bshift != sblock.fs_bshift || 393 altsblock.fs_fshift != sblock.fs_fshift || 394 altsblock.fs_fragshift != sblock.fs_fragshift || 395 altsblock.fs_fsbtodb != sblock.fs_fsbtodb || 396 altsblock.fs_sbsize != sblock.fs_sbsize || 397 altsblock.fs_nindir != sblock.fs_nindir || 398 altsblock.fs_inopb != sblock.fs_inopb || 399 altsblock.fs_cssize != sblock.fs_cssize || 400 altsblock.fs_cpg != sblock.fs_cpg || 401 altsblock.fs_ipg != sblock.fs_ipg || 402 altsblock.fs_fpg != sblock.fs_fpg || 403 altsblock.fs_magic != sblock.fs_magic) { 404 badsb(listerr, 405 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 406 return (0); 407 } 408 havesb = 1; 409 return (1); 410 } 411 412 static void 413 badsb(int listerr, char *s) 414 { 415 416 if (!listerr) 417 return; 418 if (preen) 419 printf("%s: ", cdevname); 420 pfatal("BAD SUPER BLOCK: %s\n", s); 421 } 422 423