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 30 #if 0 31 #ifndef lint 32 static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 33 #endif /* not lint */ 34 #endif 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #define FSTYPENAMES 41 #include <sys/disklabel.h> 42 #include <sys/file.h> 43 #include <sys/sysctl.h> 44 45 #include <ufs/ufs/dinode.h> 46 #include <ufs/ffs/fs.h> 47 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <limits.h> 52 #include <stdint.h> 53 #include <string.h> 54 55 #include "fsck.h" 56 57 struct bufarea asblk; 58 #define altsblock (*asblk.b_un.b_fs) 59 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 60 61 static void badsb(int listerr, const char *s); 62 63 /* 64 * Read in a superblock finding an alternate if necessary. 65 * Return 1 if successful, 0 if unsuccessful, -1 if file system 66 * is already clean (ckclean and preen mode only). 67 */ 68 int 69 setup(char *dev) 70 { 71 long asked, i, j; 72 long bmapsize; 73 struct stat statb; 74 size_t size; 75 76 havesb = 0; 77 fswritefd = -1; 78 cursnapshot = 0; 79 if (stat(dev, &statb) < 0) { 80 printf("Can't stat %s: %s\n", dev, strerror(errno)); 81 if (bkgrdflag) { 82 unlink(snapname); 83 bkgrdflag = 0; 84 } 85 return (0); 86 } 87 if ((statb.st_mode & S_IFMT) != S_IFCHR && 88 (statb.st_mode & S_IFMT) != S_IFBLK) { 89 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 90 unlink(snapname); 91 printf("background fsck lacks a snapshot\n"); 92 exit(EEXIT); 93 } 94 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 95 cursnapshot = statb.st_ino; 96 } else { 97 if (cvtlevel == 0 || 98 (statb.st_flags & SF_SNAPSHOT) == 0) { 99 if (preen && bkgrdflag) { 100 unlink(snapname); 101 bkgrdflag = 0; 102 } 103 pfatal("%s is not a disk device", dev); 104 if (reply("CONTINUE") == 0) { 105 if (bkgrdflag) { 106 unlink(snapname); 107 bkgrdflag = 0; 108 } 109 return (0); 110 } 111 } else { 112 if (bkgrdflag) { 113 unlink(snapname); 114 bkgrdflag = 0; 115 } 116 pfatal("cannot convert a snapshot"); 117 exit(EEXIT); 118 } 119 } 120 } 121 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 122 if (bkgrdflag) { 123 unlink(snapname); 124 bkgrdflag = 0; 125 } 126 printf("Can't open %s: %s\n", dev, strerror(errno)); 127 return (0); 128 } 129 if (bkgrdflag) { 130 unlink(snapname); 131 size = MIBSIZE; 132 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 133 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 134 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 135 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 136 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 137 pfatal("kernel lacks background fsck support\n"); 138 exit(EEXIT); 139 } 140 /* 141 * When kernel is lack of runtime bgfsck superblock summary 142 * adjustment functionality, it does not mean we can not 143 * continue, as old kernels will recompute the summary at 144 * mount time. However, it will be an unexpected softupdates 145 * inconsistency if it turns out that the summary is still 146 * incorrect. Set a flag so subsequent operation can know 147 * this. 148 */ 149 bkgrdsumadj = 1; 150 if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 || 151 sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 || 152 sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 || 153 sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 || 154 sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) { 155 bkgrdsumadj = 0; 156 pwarn("kernel lacks runtime superblock summary adjustment support"); 157 } 158 cmd.version = FFS_CMD_VERSION; 159 cmd.handle = fsreadfd; 160 fswritefd = -1; 161 } 162 if (preen == 0) 163 printf("** %s", dev); 164 if (bkgrdflag == 0 && 165 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 166 fswritefd = -1; 167 if (preen) 168 pfatal("NO WRITE ACCESS"); 169 printf(" (NO WRITE)"); 170 } 171 if (preen == 0) 172 printf("\n"); 173 /* 174 * Read in the superblock, looking for alternates if necessary 175 */ 176 if (readsb(1) == 0) { 177 skipclean = 0; 178 if (bflag || preen) 179 return(0); 180 /* Looking for alternates is hard punt for now but retain structure */ 181 return (0); 182 } 183 if (skipclean && ckclean && sblock.fs_clean) { 184 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 185 return (-1); 186 } 187 maxfsblock = sblock.fs_size; 188 maxino = sblock.fs_ncg * sblock.fs_ipg; 189 /* 190 * Check and potentially fix certain fields in the super block. 191 */ 192 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 193 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 194 if (reply("SET TO DEFAULT") == 1) { 195 sblock.fs_optim = FS_OPTTIME; 196 sbdirty(); 197 } 198 } 199 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 200 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 201 sblock.fs_minfree); 202 if (reply("SET TO DEFAULT") == 1) { 203 sblock.fs_minfree = 10; 204 sbdirty(); 205 } 206 } 207 if (sblock.fs_magic == FS_UFS1_MAGIC && 208 sblock.fs_old_inodefmt < FS_44INODEFMT) { 209 pwarn("Format of file system is too old.\n"); 210 pwarn("Must update to modern format using a version of fsck\n"); 211 pfatal("from before 2002 with the command ``fsck -c 2''\n"); 212 exit(EEXIT); 213 } 214 if (asblk.b_dirty && !bflag) { 215 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 216 flush(fswritefd, &asblk); 217 } 218 /* 219 * read in the summary info. 220 */ 221 asked = 0; 222 sblock.fs_csp = Calloc(1, sblock.fs_cssize); 223 if (sblock.fs_csp == NULL) { 224 printf("cannot alloc %u bytes for cg summary info\n", 225 (unsigned)sblock.fs_cssize); 226 goto badsb; 227 } 228 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 229 size = MIN(sblock.fs_cssize - i, sblock.fs_bsize); 230 readcnt[sblk.b_type]++; 231 if (blread(fsreadfd, (char *)sblock.fs_csp + i, 232 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 233 size) != 0 && !asked) { 234 pfatal("BAD SUMMARY INFORMATION"); 235 if (reply("CONTINUE") == 0) { 236 ckfini(0); 237 exit(EEXIT); 238 } 239 asked++; 240 } 241 } 242 /* 243 * allocate and initialize the necessary maps 244 */ 245 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); 246 blockmap = Calloc((unsigned)bmapsize, sizeof (char)); 247 if (blockmap == NULL) { 248 printf("cannot alloc %u bytes for blockmap\n", 249 (unsigned)bmapsize); 250 goto badsb; 251 } 252 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist)); 253 if (inostathead == NULL) { 254 printf("cannot alloc %u bytes for inostathead\n", 255 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 256 goto badsb; 257 } 258 numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128); 259 dirhash = numdirs; 260 inplast = 0; 261 listmax = numdirs + 10; 262 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *)); 263 inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *)); 264 if (inpsort == NULL || inphead == NULL) { 265 printf("cannot alloc %ju bytes for inphead\n", 266 (uintmax_t)numdirs * sizeof(struct inoinfo *)); 267 goto badsb; 268 } 269 bufinit(); 270 if (sblock.fs_flags & FS_DOSOFTDEP) 271 usedsoftdep = 1; 272 else 273 usedsoftdep = 0; 274 return (1); 275 276 badsb: 277 ckfini(0); 278 return (0); 279 } 280 281 /* 282 * Possible superblock locations ordered from most to least likely. 283 */ 284 static int sblock_try[] = SBLOCKSEARCH; 285 286 #define BAD_MAGIC_MSG \ 287 "The previous newfs operation on this volume did not complete.\n" \ 288 "You must complete newfs before mounting this volume.\n" 289 290 /* 291 * Read in the super block and its summary info. 292 */ 293 int 294 readsb(int listerr) 295 { 296 ufs2_daddr_t super; 297 int i, bad; 298 299 if (bflag) { 300 super = bflag; 301 readcnt[sblk.b_type]++; 302 if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) 303 return (0); 304 if (sblock.fs_magic == FS_BAD_MAGIC) { 305 fprintf(stderr, BAD_MAGIC_MSG); 306 exit(11); 307 } 308 if (sblock.fs_magic != FS_UFS1_MAGIC && 309 sblock.fs_magic != FS_UFS2_MAGIC) { 310 fprintf(stderr, "%jd is not a file system superblock\n", 311 bflag); 312 return (0); 313 } 314 } else { 315 for (i = 0; sblock_try[i] != -1; i++) { 316 super = sblock_try[i] / dev_bsize; 317 readcnt[sblk.b_type]++; 318 if ((blread(fsreadfd, (char *)&sblock, super, 319 (long)SBLOCKSIZE))) 320 return (0); 321 if (sblock.fs_magic == FS_BAD_MAGIC) { 322 fprintf(stderr, BAD_MAGIC_MSG); 323 exit(11); 324 } 325 if ((sblock.fs_magic == FS_UFS1_MAGIC || 326 (sblock.fs_magic == FS_UFS2_MAGIC && 327 sblock.fs_sblockloc == sblock_try[i])) && 328 sblock.fs_ncg >= 1 && 329 sblock.fs_bsize >= MINBSIZE && 330 sblock.fs_sbsize >= roundup(sizeof(struct fs), dev_bsize)) 331 break; 332 } 333 if (sblock_try[i] == -1) { 334 fprintf(stderr, "Cannot find file system superblock\n"); 335 return (0); 336 } 337 } 338 /* 339 * Compute block size that the file system is based on, 340 * according to fsbtodb, and adjust superblock block number 341 * so we can tell if this is an alternate later. 342 */ 343 super *= dev_bsize; 344 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 345 sblk.b_bno = super / dev_bsize; 346 sblk.b_size = SBLOCKSIZE; 347 /* 348 * Compare all fields that should not differ in alternate super block. 349 * When an alternate super-block is specified this check is skipped. 350 */ 351 if (bflag) 352 goto out; 353 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 354 if (asblk.b_errs) 355 return (0); 356 bad = 0; 357 #define CHK(x, y) \ 358 if (altsblock.x != sblock.x) { \ 359 bad++; \ 360 if (listerr && debug) \ 361 printf("SUPER BLOCK VS ALTERNATE MISMATCH %s: " y " vs " y "\n", \ 362 #x, (intmax_t)sblock.x, (intmax_t)altsblock.x); \ 363 } 364 CHK(fs_sblkno, "%jd"); 365 CHK(fs_cblkno, "%jd"); 366 CHK(fs_iblkno, "%jd"); 367 CHK(fs_dblkno, "%jd"); 368 CHK(fs_ncg, "%jd"); 369 CHK(fs_bsize, "%jd"); 370 CHK(fs_fsize, "%jd"); 371 CHK(fs_frag, "%jd"); 372 CHK(fs_bmask, "%#jx"); 373 CHK(fs_fmask, "%#jx"); 374 CHK(fs_bshift, "%jd"); 375 CHK(fs_fshift, "%jd"); 376 CHK(fs_fragshift, "%jd"); 377 CHK(fs_fsbtodb, "%jd"); 378 CHK(fs_sbsize, "%jd"); 379 CHK(fs_nindir, "%jd"); 380 CHK(fs_inopb, "%jd"); 381 CHK(fs_cssize, "%jd"); 382 CHK(fs_ipg, "%jd"); 383 CHK(fs_fpg, "%jd"); 384 CHK(fs_magic, "%#jx"); 385 #undef CHK 386 if (bad) { 387 if (listerr == 0) 388 return (0); 389 if (preen) 390 printf("%s: ", cdevname); 391 printf( 392 "VALUES IN SUPER BLOCK LSB=%jd DISAGREE WITH THOSE IN\n" 393 "LAST ALTERNATE LSB=%jd\n", 394 sblk.b_bno, asblk.b_bno); 395 if (reply("IGNORE ALTERNATE SUPER BLOCK") == 0) 396 return (0); 397 } 398 out: 399 /* 400 * If not yet done, update UFS1 superblock with new wider fields. 401 */ 402 if (sblock.fs_magic == FS_UFS1_MAGIC && 403 sblock.fs_maxbsize != sblock.fs_bsize) { 404 sblock.fs_maxbsize = sblock.fs_bsize; 405 sblock.fs_time = sblock.fs_old_time; 406 sblock.fs_size = sblock.fs_old_size; 407 sblock.fs_dsize = sblock.fs_old_dsize; 408 sblock.fs_csaddr = sblock.fs_old_csaddr; 409 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 410 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 411 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 412 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 413 } 414 havesb = 1; 415 return (1); 416 } 417 418 void 419 sblock_init(void) 420 { 421 422 fswritefd = -1; 423 fsmodified = 0; 424 lfdir = 0; 425 initbarea(&sblk, BT_SUPERBLK); 426 initbarea(&asblk, BT_SUPERBLK); 427 sblk.b_un.b_buf = Malloc(SBLOCKSIZE); 428 asblk.b_un.b_buf = Malloc(SBLOCKSIZE); 429 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 430 errx(EEXIT, "cannot allocate space for superblock"); 431 dev_bsize = secsize = DEV_BSIZE; 432 } 433