1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/disk.h> 34 #include <sys/stat.h> 35 #define FSTYPENAMES 36 #include <sys/disklabel.h> 37 #include <sys/file.h> 38 #include <sys/sysctl.h> 39 40 #include <ufs/ufs/dinode.h> 41 #include <ufs/ffs/fs.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <limits.h> 47 #include <stdint.h> 48 #include <string.h> 49 50 #include "fsck.h" 51 52 struct inohash *inphash; /* hash list of directory inode info */ 53 struct inoinfo **inpsort; /* disk order list of directory inodes */ 54 struct inode snaplist[FSMAXSNAP + 1]; /* list of active snapshots */ 55 int snapcnt; /* number of active snapshots */ 56 char *copybuf; /* buffer to copy snapshot blocks */ 57 58 static int sbhashfailed; 59 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 60 61 static int calcsb(char *dev, int devfd, struct fs *fs); 62 static void saverecovery(int readfd, int writefd); 63 static int chkrecovery(int devfd); 64 static int getlbnblkno(struct inodesc *); 65 static int checksnapinfo(struct inode *); 66 67 /* 68 * Read in a superblock finding an alternate if necessary. 69 * Return 1 if successful, 0 if unsuccessful, -1 if file system 70 * is already clean (ckclean and preen mode only). 71 */ 72 int 73 setup(char *dev) 74 { 75 long i, bmapsize; 76 struct inode ip; 77 78 /* 79 * We are expected to have an open file descriptor and a superblock. 80 */ 81 if (fsreadfd < 0 || havesb == 0) { 82 if (debug) { 83 if (fsreadfd < 0) 84 printf("setup: missing fsreadfd\n"); 85 else 86 printf("setup: missing superblock\n"); 87 } 88 return (0); 89 } 90 if (preen == 0) 91 printf("** %s", dev); 92 if (bkgrdflag == 0 && 93 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 94 fswritefd = -1; 95 if (preen) 96 pfatal("NO WRITE ACCESS"); 97 printf(" (NO WRITE)"); 98 } 99 if (preen == 0) 100 printf("\n"); 101 if (sbhashfailed != 0) { 102 pwarn("SUPERBLOCK CHECK HASH FAILED"); 103 if (fswritefd == -1) 104 pwarn("OPENED READONLY SO CANNOT CORRECT CHECK HASH\n"); 105 else if (preen || reply("CORRECT CHECK HASH") != 0) { 106 if (preen) 107 printf(" (CORRECTED)\n"); 108 sblock.fs_clean = 0; 109 sbdirty(); 110 } 111 } 112 if (skipclean && ckclean && sblock.fs_clean) { 113 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 114 return (-1); 115 } 116 maxfsblock = sblock.fs_size; 117 maxino = sblock.fs_ncg * sblock.fs_ipg; 118 /* 119 * Check and potentially fix certain fields in the super block. 120 */ 121 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 122 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 123 if (reply("SET TO DEFAULT") == 1) { 124 sblock.fs_optim = FS_OPTTIME; 125 sbdirty(); 126 } 127 } 128 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 129 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 130 sblock.fs_minfree); 131 if (reply("SET TO DEFAULT") == 1) { 132 sblock.fs_minfree = 10; 133 sbdirty(); 134 } 135 } 136 if (sblock.fs_magic == FS_UFS1_MAGIC && 137 sblock.fs_old_inodefmt < FS_44INODEFMT) { 138 pwarn("Format of file system is too old.\n"); 139 pwarn("Must update to modern format using a version of fsck\n"); 140 pfatal("from before 2002 with the command ``fsck -c 2''\n"); 141 exit(EEXIT); 142 } 143 if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC && 144 fswritefd != -1 && chkrecovery(fsreadfd) == 0 && 145 reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0) 146 saverecovery(fsreadfd, fswritefd); 147 /* 148 * allocate and initialize the necessary maps 149 */ 150 bufinit(); 151 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); 152 blockmap = Calloc((unsigned)bmapsize, sizeof (char)); 153 if (blockmap == NULL) { 154 printf("cannot alloc %u bytes for blockmap\n", 155 (unsigned)bmapsize); 156 goto badsb; 157 } 158 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist)); 159 if (inostathead == NULL) { 160 printf("cannot alloc %u bytes for inostathead\n", 161 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 162 goto badsb; 163 } 164 numdirs = sblock.fs_cstotal.cs_ndir; 165 dirhash = MAX(numdirs / 2, 1); 166 inplast = 0; 167 listmax = numdirs + 10; 168 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *)); 169 inphash = (struct inohash *)Calloc(dirhash, sizeof(struct inohash)); 170 if (inpsort == NULL || inphash == NULL) { 171 printf("cannot alloc %ju bytes for inphash\n", 172 (uintmax_t)numdirs * sizeof(struct inoinfo *)); 173 goto badsb; 174 } 175 if (sblock.fs_flags & FS_DOSOFTDEP) 176 usedsoftdep = 1; 177 else 178 usedsoftdep = 0; 179 /* 180 * Collect any snapshot inodes so that we can allow them to 181 * claim any blocks that we free. The code for doing this is 182 * imported here and into inode.c from sys/ufs/ffs/ffs_snapshot.c. 183 */ 184 for (snapcnt = 0; snapcnt < FSMAXSNAP; snapcnt++) { 185 if (sblock.fs_snapinum[snapcnt] == 0) 186 break; 187 ginode(sblock.fs_snapinum[snapcnt], &ip); 188 if ((DIP(ip.i_dp, di_mode) & IFMT) == IFREG && 189 (DIP(ip.i_dp, di_flags) & SF_SNAPSHOT) != 0 && 190 checksnapinfo(&ip)) { 191 if (debug) 192 printf("Load snapshot %jd\n", 193 (intmax_t)sblock.fs_snapinum[snapcnt]); 194 snaplist[snapcnt] = ip; 195 continue; 196 } 197 printf("Removing non-snapshot inode %ju from snapshot list\n", 198 (uintmax_t)sblock.fs_snapinum[snapcnt]); 199 irelse(&ip); 200 for (i = snapcnt + 1; i < FSMAXSNAP; i++) { 201 if (sblock.fs_snapinum[i] == 0) 202 break; 203 sblock.fs_snapinum[i - 1] = sblock.fs_snapinum[i]; 204 } 205 sblock.fs_snapinum[i - 1] = 0; 206 snapcnt--; 207 sbdirty(); 208 } 209 if (snapcnt > 0 && copybuf == NULL) { 210 copybuf = Balloc(sblock.fs_bsize); 211 if (copybuf == NULL) 212 errx(EEXIT, "cannot allocate space for snapshot " 213 "copy buffer"); 214 } 215 return (1); 216 217 badsb: 218 ckfini(0); 219 return (0); 220 } 221 222 /* 223 * Check for valid snapshot information. 224 * 225 * Each snapshot has a list of blocks that have been copied. This list 226 * is consulted before checking the snapshot inode. Its purpose is to 227 * speed checking of commonly checked blocks and to avoid recursive 228 * checks of the snapshot inode. In particular, the list must contain 229 * the superblock, the superblock summary information, and all the 230 * cylinder group blocks. The list may contain other commonly checked 231 * pointers such as those of the blocks that contain the snapshot inodes. 232 * The list is sorted into block order to allow binary search lookup. 233 * 234 * The twelve direct direct block pointers of the snapshot are always 235 * copied, so we test for them first before checking the list itself 236 * (i.e., they are not in the list). 237 * 238 * The checksnapinfo() routine needs to ensure that the list contains at 239 * least the super block, its summary information, and the cylinder groups. 240 * Here we check the list first for the superblock, zero or more cylinder 241 * groups up to the location of the superblock summary information, the 242 * summary group information, and any remaining cylinder group maps that 243 * follow it. We skip over any other entries in the list. 244 */ 245 #define CHKBLKINLIST(chkblk) \ 246 /* All UFS_NDADDR blocks are copied */ \ 247 if ((chkblk) >= UFS_NDADDR) { \ 248 /* Skip over blocks that are not of interest */ \ 249 while (*blkp < (chkblk) && blkp < lastblkp) \ 250 blkp++; \ 251 /* Fail if end of list and not all blocks found */ \ 252 if (blkp >= lastblkp) { \ 253 pwarn("UFS%d snapshot inode %jd failed: " \ 254 "improper block list length (%jd)\n", \ 255 sblock.fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 256 (intmax_t)snapip->i_number, \ 257 (intmax_t)(lastblkp - &snapblklist[0])); \ 258 status = 0; \ 259 } \ 260 /* Fail if block we seek is missing */ \ 261 else if (*blkp++ != (chkblk)) { \ 262 pwarn("UFS%d snapshot inode %jd failed: " \ 263 "block list (%jd) != %s (%jd)\n", \ 264 sblock.fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 265 (intmax_t)snapip->i_number, \ 266 (intmax_t)blkp[-1], #chkblk, \ 267 (intmax_t)chkblk); \ 268 status = 0; \ 269 } \ 270 } 271 272 static int 273 checksnapinfo(struct inode *snapip) 274 { 275 struct fs *fs; 276 struct bufarea *bp; 277 struct inodesc idesc; 278 daddr_t *snapblklist, *blkp, *lastblkp, csblkno; 279 int cg, loc, len, status; 280 ufs_lbn_t lbn; 281 size_t size; 282 283 fs = &sblock; 284 memset(&idesc, 0, sizeof(struct inodesc)); 285 idesc.id_type = ADDR; 286 idesc.id_func = getlbnblkno; 287 idesc.id_number = snapip->i_number; 288 lbn = howmany(fs->fs_size, fs->fs_frag); 289 idesc.id_parent = lbn; /* sought after blkno */ 290 if ((ckinode(snapip->i_dp, &idesc) & FOUND) == 0) 291 return (0); 292 size = fragroundup(fs, 293 DIP(snapip->i_dp, di_size) - lblktosize(fs, lbn)); 294 bp = getdatablk(idesc.id_parent, size, BT_DATA); 295 if (bp->b_errs != 0) 296 return (0); 297 snapblklist = (daddr_t *)bp->b_un.b_buf; 298 /* 299 * snapblklist[0] is the size of the list 300 * snapblklist[1] is the first element of the list 301 * 302 * We need to be careful to bound the size of the list and verify 303 * that we have not run off the end of it if it or its size has 304 * been corrupted. 305 */ 306 blkp = &snapblklist[1]; 307 lastblkp = &snapblklist[MAX(0, 308 MIN(snapblklist[0] + 1, size / sizeof(daddr_t)))]; 309 status = 1; 310 /* Check that the superblock is listed. */ 311 CHKBLKINLIST(lblkno(fs, fs->fs_sblockloc)); 312 if (status == 0) 313 goto out; 314 /* 315 * Calculate where the summary information is located. 316 * Usually it is in the first cylinder group, but growfs 317 * may move it to the first cylinder group that it adds. 318 * 319 * Check all cylinder groups up to the summary information. 320 */ 321 csblkno = fragstoblks(fs, fs->fs_csaddr); 322 for (cg = 0; cg < fs->fs_ncg; cg++) { 323 if (fragstoblks(fs, cgtod(fs, cg)) > csblkno) 324 break; 325 CHKBLKINLIST(fragstoblks(fs, cgtod(fs, cg))); 326 if (status == 0) 327 goto out; 328 } 329 /* Check the summary information block(s). */ 330 len = howmany(fs->fs_cssize, fs->fs_bsize); 331 for (loc = 0; loc < len; loc++) { 332 CHKBLKINLIST(csblkno + loc); 333 if (status == 0) 334 goto out; 335 } 336 /* Check the remaining cylinder groups. */ 337 for (; cg < fs->fs_ncg; cg++) { 338 CHKBLKINLIST(fragstoblks(fs, cgtod(fs, cg))); 339 if (status == 0) 340 goto out; 341 } 342 out: 343 brelse(bp); 344 return (status); 345 } 346 347 /* 348 * Return the block number associated with a specified inode lbn. 349 * Requested lbn is in id_parent. If found, block is returned in 350 * id_parent. 351 */ 352 static int 353 getlbnblkno(struct inodesc *idesc) 354 { 355 356 if (idesc->id_lbn < idesc->id_parent) 357 return (KEEPON); 358 idesc->id_parent = idesc->id_blkno; 359 return (STOP | FOUND); 360 } 361 362 /* 363 * Open a device or file to be checked by fsck. 364 */ 365 int 366 openfilesys(char *dev) 367 { 368 struct stat statb; 369 int saved_fsreadfd; 370 371 if (stat(dev, &statb) < 0) 372 return (0); 373 if ((statb.st_mode & S_IFMT) != S_IFCHR && 374 (statb.st_mode & S_IFMT) != S_IFBLK) { 375 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 376 pwarn("BACKGROUND FSCK LACKS A SNAPSHOT\n"); 377 return (0); 378 } 379 if (bkgrdflag != 0) { 380 cursnapshot = statb.st_ino; 381 } else { 382 pwarn("%s IS NOT A DISK DEVICE\n", dev); 383 if (preen || reply("CONTINUE") == 0) 384 return (0); 385 } 386 } 387 saved_fsreadfd = fsreadfd; 388 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 389 fsreadfd = saved_fsreadfd; 390 return (0); 391 } 392 if (saved_fsreadfd != -1) 393 close(saved_fsreadfd); 394 return (1); 395 } 396 397 /* 398 * Read in the super block and its summary info. 399 */ 400 int 401 readsb(void) 402 { 403 struct fs *fs; 404 405 sbhashfailed = 0; 406 readcnt[sblk.b_type]++; 407 /* 408 * If bflag is given, then check just that superblock. 409 */ 410 if (bflag) { 411 switch (sbget(fsreadfd, &fs, bflag * dev_bsize, 0)) { 412 case 0: 413 goto goodsb; 414 case EINTEGRITY: 415 printf("Check hash failed for superblock at %jd\n", 416 bflag); 417 return (0); 418 case ENOENT: 419 printf("%jd is not a file system superblock\n", bflag); 420 return (0); 421 case EIO: 422 default: 423 printf("I/O error reading %jd\n", bflag); 424 return (0); 425 } 426 } 427 /* 428 * Check for the standard superblock and use it if good. 429 */ 430 if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG) == 0) 431 goto goodsb; 432 /* 433 * Check if the only problem is a check-hash failure. 434 */ 435 skipclean = 0; 436 if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG | UFS_NOHASHFAIL) == 0) { 437 sbhashfailed = 1; 438 goto goodsb; 439 } 440 /* 441 * Do an exhaustive search for a usable superblock. 442 */ 443 switch (sbsearch(fsreadfd, &fs, 0)) { 444 case 0: 445 goto goodsb; 446 case ENOENT: 447 printf("SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. " 448 "YOU MUST USE THE\n-b OPTION TO FSCK TO SPECIFY " 449 "THE LOCATION OF AN ALTERNATE\nSUPER-BLOCK TO " 450 "SUPPLY NEEDED INFORMATION; SEE fsck_ffs(8).\n"); 451 return (0); 452 case EIO: 453 default: 454 printf("I/O error reading a usable superblock\n"); 455 return (0); 456 } 457 458 goodsb: 459 memcpy(&sblock, fs, fs->fs_sbsize); 460 free(fs); 461 /* 462 * Compute block size that the file system is based on, 463 * according to fsbtodb, and adjust superblock block number 464 * so we can tell if this is an alternate later. 465 */ 466 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 467 sblk.b_bno = sblock.fs_sblockactualloc / dev_bsize; 468 sblk.b_size = SBLOCKSIZE; 469 /* 470 * If not yet done, update UFS1 superblock with new wider fields. 471 */ 472 if (sblock.fs_magic == FS_UFS1_MAGIC && 473 sblock.fs_maxbsize != sblock.fs_bsize) { 474 sblock.fs_maxbsize = sblock.fs_bsize; 475 sblock.fs_time = sblock.fs_old_time; 476 sblock.fs_size = sblock.fs_old_size; 477 sblock.fs_dsize = sblock.fs_old_dsize; 478 sblock.fs_csaddr = sblock.fs_old_csaddr; 479 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 480 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 481 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 482 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 483 } 484 havesb = 1; 485 return (1); 486 } 487 488 void 489 sblock_init(void) 490 { 491 492 fsreadfd = -1; 493 fswritefd = -1; 494 fsmodified = 0; 495 lfdir = 0; 496 initbarea(&sblk, BT_SUPERBLK); 497 sblk.b_un.b_buf = Balloc(SBLOCKSIZE); 498 if (sblk.b_un.b_buf == NULL) 499 errx(EEXIT, "cannot allocate space for superblock"); 500 dev_bsize = secsize = DEV_BSIZE; 501 } 502 503 /* 504 * Calculate a prototype superblock based on information in the boot area. 505 * When done the cgsblock macro can be calculated and the fs_ncg field 506 * can be used. Do NOT attempt to use other macros without verifying that 507 * their needed information is available! 508 */ 509 static int 510 calcsb(char *dev, int devfd, struct fs *fs) 511 { 512 struct fsrecovery *fsr; 513 char *fsrbuf; 514 u_int secsize; 515 516 /* 517 * We need fragments-per-group and the partition-size. 518 * 519 * Newfs stores these details at the end of the boot block area 520 * at the start of the filesystem partition. If they have been 521 * overwritten by a boot block, we fail. But usually they are 522 * there and we can use them. 523 */ 524 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1) 525 return (0); 526 fsrbuf = Balloc(secsize); 527 if (fsrbuf == NULL) 528 errx(EEXIT, "calcsb: cannot allocate recovery buffer"); 529 if (blread(devfd, fsrbuf, 530 (SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0) { 531 free(fsrbuf); 532 return (0); 533 } 534 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr]; 535 if (fsr->fsr_magic != FS_UFS2_MAGIC) { 536 free(fsrbuf); 537 return (0); 538 } 539 memset(fs, 0, sizeof(struct fs)); 540 fs->fs_fpg = fsr->fsr_fpg; 541 fs->fs_fsbtodb = fsr->fsr_fsbtodb; 542 fs->fs_sblkno = fsr->fsr_sblkno; 543 fs->fs_magic = fsr->fsr_magic; 544 fs->fs_ncg = fsr->fsr_ncg; 545 free(fsrbuf); 546 return (1); 547 } 548 549 /* 550 * Check to see if recovery information exists. 551 * Return 1 if it exists or cannot be created. 552 * Return 0 if it does not exist and can be created. 553 */ 554 static int 555 chkrecovery(int devfd) 556 { 557 struct fsrecovery *fsr; 558 char *fsrbuf; 559 u_int secsize, rdsize; 560 561 /* 562 * Could not determine if backup material exists, so do not 563 * offer to create it. 564 */ 565 fsrbuf = NULL; 566 rdsize = sblock.fs_fsize; 567 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 || 568 rdsize % secsize != 0 || 569 (fsrbuf = Balloc(rdsize)) == NULL || 570 blread(devfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, 571 rdsize) != 0) { 572 free(fsrbuf); 573 return (1); 574 } 575 /* 576 * Recovery material has already been created, so do not 577 * need to create it again. 578 */ 579 fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr]; 580 if (fsr->fsr_magic == FS_UFS2_MAGIC) { 581 free(fsrbuf); 582 return (1); 583 } 584 /* 585 * Recovery material has not been created and can be if desired. 586 */ 587 free(fsrbuf); 588 return (0); 589 } 590 591 /* 592 * Read the last filesystem-size piece of the boot block, replace the 593 * last 20 bytes with the recovery information, then write it back. 594 * The recovery information only works for UFS2 filesystems. 595 */ 596 static void 597 saverecovery(int readfd, int writefd) 598 { 599 struct fsrecovery *fsr; 600 char *fsrbuf; 601 u_int secsize, rdsize; 602 603 fsrbuf = NULL; 604 rdsize = sblock.fs_fsize; 605 if (sblock.fs_magic != FS_UFS2_MAGIC || 606 ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 || 607 rdsize % secsize != 0 || 608 (fsrbuf = Balloc(rdsize)) == NULL || 609 blread(readfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, 610 rdsize) != 0) { 611 printf("RECOVERY DATA COULD NOT BE CREATED\n"); 612 free(fsrbuf); 613 return; 614 } 615 fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr]; 616 fsr->fsr_magic = sblock.fs_magic; 617 fsr->fsr_fpg = sblock.fs_fpg; 618 fsr->fsr_fsbtodb = sblock.fs_fsbtodb; 619 fsr->fsr_sblkno = sblock.fs_sblkno; 620 fsr->fsr_ncg = sblock.fs_ncg; 621 blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, rdsize); 622 free(fsrbuf); 623 } 624