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 #if 0 33 #ifndef lint 34 static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 35 #endif /* not lint */ 36 #endif 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/disk.h> 42 #include <sys/stat.h> 43 #define FSTYPENAMES 44 #include <sys/disklabel.h> 45 #include <sys/file.h> 46 #include <sys/sysctl.h> 47 48 #include <ufs/ufs/dinode.h> 49 #include <ufs/ffs/fs.h> 50 51 #include <ctype.h> 52 #include <err.h> 53 #include <errno.h> 54 #include <limits.h> 55 #include <stdint.h> 56 #include <string.h> 57 #include <libufs.h> 58 59 #include "fsck.h" 60 61 struct inoinfo **inphead, **inpsort; /* info about all inodes */ 62 struct inode snaplist[FSMAXSNAP + 1]; /* list of active snapshots */ 63 int snapcnt; /* number of active snapshots */ 64 char *copybuf; /* buffer to copy snapshot blocks */ 65 66 static int sbhashfailed; 67 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 68 69 static int calcsb(char *dev, int devfd, struct fs *fs); 70 static void saverecovery(int readfd, int writefd); 71 static int chkrecovery(int devfd); 72 static int getlbnblkno(struct inodesc *); 73 static int checksnapinfo(struct inode *); 74 75 /* 76 * Read in a superblock finding an alternate if necessary. 77 * Return 1 if successful, 0 if unsuccessful, -1 if file system 78 * is already clean (ckclean and preen mode only). 79 */ 80 int 81 setup(char *dev) 82 { 83 long i, bmapsize; 84 struct inode ip; 85 86 /* 87 * We are expected to have an open file descriptor and a superblock. 88 */ 89 if (fsreadfd < 0 || havesb == 0) { 90 if (debug) 91 printf("setup: bad fsreadfd or missing superblock\n"); 92 return (0); 93 } 94 if (preen == 0) 95 printf("** %s", dev); 96 if (bkgrdflag == 0 && 97 (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 if (sbhashfailed != 0) { 106 pwarn("SUPERBLOCK CHECK HASH FAILED"); 107 if (fswritefd == -1) 108 pwarn("OPENED READONLY SO CANNOT CORRECT CHECK HASH\n"); 109 else if (preen || reply("CORRECT CHECK HASH") != 0) { 110 if (preen) 111 printf(" (CORRECTED)\n"); 112 sblock.fs_clean = 0; 113 sbdirty(); 114 } 115 } 116 if (skipclean && ckclean && sblock.fs_clean) { 117 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 118 return (-1); 119 } 120 maxfsblock = sblock.fs_size; 121 maxino = sblock.fs_ncg * sblock.fs_ipg; 122 /* 123 * Check and potentially fix certain fields in the super block. 124 */ 125 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 126 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 127 if (reply("SET TO DEFAULT") == 1) { 128 sblock.fs_optim = FS_OPTTIME; 129 sbdirty(); 130 } 131 } 132 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 133 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 134 sblock.fs_minfree); 135 if (reply("SET TO DEFAULT") == 1) { 136 sblock.fs_minfree = 10; 137 sbdirty(); 138 } 139 } 140 if (sblock.fs_magic == FS_UFS1_MAGIC && 141 sblock.fs_old_inodefmt < FS_44INODEFMT) { 142 pwarn("Format of file system is too old.\n"); 143 pwarn("Must update to modern format using a version of fsck\n"); 144 pfatal("from before 2002 with the command ``fsck -c 2''\n"); 145 exit(EEXIT); 146 } 147 if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC && 148 fswritefd != -1 && chkrecovery(fsreadfd) == 0 && 149 reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0) 150 saverecovery(fsreadfd, fswritefd); 151 /* 152 * allocate and initialize the necessary maps 153 */ 154 bufinit(); 155 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); 156 blockmap = Calloc((unsigned)bmapsize, sizeof (char)); 157 if (blockmap == NULL) { 158 printf("cannot alloc %u bytes for blockmap\n", 159 (unsigned)bmapsize); 160 goto badsb; 161 } 162 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist)); 163 if (inostathead == NULL) { 164 printf("cannot alloc %u bytes for inostathead\n", 165 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 166 goto badsb; 167 } 168 numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128); 169 dirhash = numdirs; 170 inplast = 0; 171 listmax = numdirs + 10; 172 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *)); 173 inphead = (struct inoinfo **)Calloc(numdirs, sizeof(struct inoinfo *)); 174 if (inpsort == NULL || inphead == NULL) { 175 printf("cannot alloc %ju bytes for inphead\n", 176 (uintmax_t)numdirs * sizeof(struct inoinfo *)); 177 goto badsb; 178 } 179 if (sblock.fs_flags & FS_DOSOFTDEP) 180 usedsoftdep = 1; 181 else 182 usedsoftdep = 0; 183 /* 184 * Collect any snapshot inodes so that we can allow them to 185 * claim any blocks that we free. The code for doing this is 186 * imported here and into inode.c from sys/ufs/ffs/ffs_snapshot.c. 187 */ 188 for (snapcnt = 0; snapcnt < FSMAXSNAP; snapcnt++) { 189 if (sblock.fs_snapinum[snapcnt] == 0) 190 break; 191 ginode(sblock.fs_snapinum[snapcnt], &ip); 192 if ((DIP(ip.i_dp, di_mode) & IFMT) == IFREG && 193 (DIP(ip.i_dp, di_flags) & SF_SNAPSHOT) != 0 && 194 checksnapinfo(&ip)) { 195 if (debug) 196 printf("Load snapshot %jd\n", 197 (intmax_t)sblock.fs_snapinum[snapcnt]); 198 snaplist[snapcnt] = ip; 199 continue; 200 } 201 printf("Removing non-snapshot inode %ju from snapshot list\n", 202 (uintmax_t)sblock.fs_snapinum[snapcnt]); 203 irelse(&ip); 204 for (i = snapcnt + 1; i < FSMAXSNAP; i++) { 205 if (sblock.fs_snapinum[i] == 0) 206 break; 207 sblock.fs_snapinum[i - 1] = sblock.fs_snapinum[i]; 208 } 209 sblock.fs_snapinum[i - 1] = 0; 210 snapcnt--; 211 sbdirty(); 212 } 213 if (snapcnt > 0 && copybuf == NULL) { 214 copybuf = Malloc(sblock.fs_bsize); 215 if (copybuf == NULL) 216 errx(EEXIT, "cannot allocate space for snapshot " 217 "copy buffer"); 218 } 219 return (1); 220 221 badsb: 222 ckfini(0); 223 return (0); 224 } 225 226 /* 227 * Check for valid snapshot information. 228 * 229 * Each snapshot has a list of blocks that have been copied. This list 230 * is consulted before checking the snapshot inode. Its purpose is to 231 * speed checking of commonly checked blocks and to avoid recursive 232 * checks of the snapshot inode. In particular, the list must contain 233 * the superblock, the superblock summary information, and all the 234 * cylinder group blocks. The list may contain other commonly checked 235 * pointers such as those of the blocks that contain the snapshot inodes. 236 * The list is sorted into block order to allow binary search lookup. 237 * 238 * The twelve direct direct block pointers of the snapshot are always 239 * copied, so we test for them first before checking the list itself 240 * (i.e., they are not in the list). 241 * 242 * The checksnapinfo() routine needs to ensure that the list contains at 243 * least the super block, its summary information, and the cylinder groups. 244 * Here we check the list first for the superblock, zero or more cylinder 245 * groups up to the location of the superblock summary information, the 246 * summary group information, and any remaining cylinder group maps that 247 * follow it. We skip over any other entries in the list. 248 */ 249 #define CHKBLKINLIST(chkblk) \ 250 /* All UFS_NDADDR blocks are copied */ \ 251 if ((chkblk) >= UFS_NDADDR) { \ 252 /* Skip over blocks that are not of interest */ \ 253 while (*blkp < (chkblk) && blkp < lastblkp) \ 254 blkp++; \ 255 /* Fail if end of list and not all blocks found */ \ 256 if (blkp >= lastblkp) { \ 257 pwarn("UFS%d snapshot inode %jd failed: " \ 258 "improper block list length (%jd)\n", \ 259 sblock.fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 260 (intmax_t)snapip->i_number, \ 261 (intmax_t)(lastblkp - &snapblklist[0])); \ 262 status = 0; \ 263 } \ 264 /* Fail if block we seek is missing */ \ 265 else if (*blkp++ != (chkblk)) { \ 266 pwarn("UFS%d snapshot inode %jd failed: " \ 267 "block list (%jd) != %s (%jd)\n", \ 268 sblock.fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 269 (intmax_t)snapip->i_number, \ 270 (intmax_t)blkp[-1], #chkblk, \ 271 (intmax_t)chkblk); \ 272 status = 0; \ 273 } \ 274 } 275 276 static int 277 checksnapinfo(struct inode *snapip) 278 { 279 struct fs *fs; 280 struct bufarea *bp; 281 struct inodesc idesc; 282 daddr_t *snapblklist, *blkp, *lastblkp, csblkno; 283 int cg, loc, len, status; 284 ufs_lbn_t lbn; 285 size_t size; 286 287 fs = &sblock; 288 memset(&idesc, 0, sizeof(struct inodesc)); 289 idesc.id_type = ADDR; 290 idesc.id_func = getlbnblkno; 291 idesc.id_number = snapip->i_number; 292 lbn = howmany(fs->fs_size, fs->fs_frag); 293 idesc.id_parent = lbn; /* sought after blkno */ 294 if ((ckinode(snapip->i_dp, &idesc) & FOUND) == 0) 295 return (0); 296 size = fragroundup(fs, 297 DIP(snapip->i_dp, di_size) - lblktosize(fs, lbn)); 298 bp = getdatablk(idesc.id_parent, size, BT_DATA); 299 snapblklist = (daddr_t *)bp->b_un.b_buf; 300 /* 301 * snapblklist[0] is the size of the list 302 * snapblklist[1] is the first element of the list 303 * 304 * We need to be careful to bound the size of the list and verify 305 * that we have not run off the end of it if it or its size has 306 * been corrupted. 307 */ 308 blkp = &snapblklist[1]; 309 lastblkp = &snapblklist[MAX(0, 310 MIN(snapblklist[0] + 1, size / sizeof(daddr_t)))]; 311 status = 1; 312 /* Check that the superblock is listed. */ 313 CHKBLKINLIST(lblkno(fs, fs->fs_sblockloc)); 314 if (status == 0) 315 goto out; 316 /* 317 * Calculate where the summary information is located. 318 * Usually it is in the first cylinder group, but growfs 319 * may move it to the first cylinder group that it adds. 320 * 321 * Check all cylinder groups up to the summary information. 322 */ 323 csblkno = fragstoblks(fs, fs->fs_csaddr); 324 for (cg = 0; cg < fs->fs_ncg; cg++) { 325 if (fragstoblks(fs, cgtod(fs, cg)) > csblkno) 326 break; 327 CHKBLKINLIST(fragstoblks(fs, cgtod(fs, cg))); 328 if (status == 0) 329 goto out; 330 } 331 /* Check the summary information block(s). */ 332 len = howmany(fs->fs_cssize, fs->fs_bsize); 333 for (loc = 0; loc < len; loc++) { 334 CHKBLKINLIST(csblkno + loc); 335 if (status == 0) 336 goto out; 337 } 338 /* Check the remaining cylinder groups. */ 339 for (; cg < fs->fs_ncg; cg++) { 340 CHKBLKINLIST(fragstoblks(fs, cgtod(fs, cg))); 341 if (status == 0) 342 goto out; 343 } 344 out: 345 brelse(bp); 346 return (status); 347 } 348 349 /* 350 * Return the block number associated with a specified inode lbn. 351 * Requested lbn is in id_parent. If found, block is returned in 352 * id_parent. 353 */ 354 static int 355 getlbnblkno(struct inodesc *idesc) 356 { 357 358 if (idesc->id_lbn < idesc->id_parent) 359 return (KEEPON); 360 idesc->id_parent = idesc->id_blkno; 361 return (STOP | FOUND); 362 } 363 364 /* 365 * Open a device or file to be checked by fsck. 366 */ 367 int 368 openfilesys(char *dev) 369 { 370 struct stat statb; 371 int saved_fsreadfd; 372 373 if (stat(dev, &statb) < 0) 374 return (0); 375 if ((statb.st_mode & S_IFMT) != S_IFCHR && 376 (statb.st_mode & S_IFMT) != S_IFBLK) { 377 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 378 pfatal("BACKGROUND FSCK LACKS A SNAPSHOT\n"); 379 exit(EEXIT); 380 } 381 if (bkgrdflag != 0) { 382 cursnapshot = statb.st_ino; 383 } else { 384 pfatal("%s IS NOT A DISK DEVICE\n", dev); 385 if (reply("CONTINUE") == 0) 386 return (0); 387 } 388 } 389 saved_fsreadfd = fsreadfd; 390 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 391 fsreadfd = saved_fsreadfd; 392 return (0); 393 } 394 if (saved_fsreadfd != -1) 395 close(saved_fsreadfd); 396 return (1); 397 } 398 399 /* 400 * Read in the super block and its summary info. 401 */ 402 int 403 readsb(void) 404 { 405 struct fs *fs; 406 407 sbhashfailed = 0; 408 readcnt[sblk.b_type]++; 409 /* 410 * If bflag is given, then check just that superblock. 411 */ 412 if (bflag) { 413 switch (sbget(fsreadfd, &fs, bflag * dev_bsize, 0)) { 414 case 0: 415 goto goodsb; 416 case EINTEGRITY: 417 printf("Check hash failed for superblock at %jd\n", 418 bflag); 419 return (0); 420 case ENOENT: 421 printf("%jd is not a file system superblock\n", bflag); 422 return (0); 423 case EIO: 424 default: 425 printf("I/O error reading %jd\n", bflag); 426 return (0); 427 } 428 } 429 /* 430 * Check for the standard superblock and use it if good. 431 */ 432 if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG) == 0) 433 goto goodsb; 434 /* 435 * Check if the only problem is a check-hash failure. 436 */ 437 skipclean = 0; 438 if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG | UFS_NOHASHFAIL) == 0) { 439 sbhashfailed = 1; 440 goto goodsb; 441 } 442 /* 443 * Do an exhaustive search for a usable superblock. 444 */ 445 switch (sbsearch(fsreadfd, &fs, 0)) { 446 case 0: 447 goto goodsb; 448 case ENOENT: 449 printf("SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. " 450 "YOU MUST USE THE\n-b OPTION TO FSCK TO SPECIFY " 451 "THE LOCATION OF AN ALTERNATE\nSUPER-BLOCK TO " 452 "SUPPLY NEEDED INFORMATION; SEE fsck_ffs(8).\n"); 453 return (0); 454 case EIO: 455 default: 456 printf("I/O error reading a usable superblock\n"); 457 return (0); 458 } 459 460 goodsb: 461 memcpy(&sblock, fs, fs->fs_sbsize); 462 free(fs); 463 /* 464 * Compute block size that the file system is based on, 465 * according to fsbtodb, and adjust superblock block number 466 * so we can tell if this is an alternate later. 467 */ 468 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 469 sblk.b_bno = sblock.fs_sblockactualloc / dev_bsize; 470 sblk.b_size = SBLOCKSIZE; 471 /* 472 * If not yet done, update UFS1 superblock with new wider fields. 473 */ 474 if (sblock.fs_magic == FS_UFS1_MAGIC && 475 sblock.fs_maxbsize != sblock.fs_bsize) { 476 sblock.fs_maxbsize = sblock.fs_bsize; 477 sblock.fs_time = sblock.fs_old_time; 478 sblock.fs_size = sblock.fs_old_size; 479 sblock.fs_dsize = sblock.fs_old_dsize; 480 sblock.fs_csaddr = sblock.fs_old_csaddr; 481 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 482 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 483 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 484 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 485 } 486 havesb = 1; 487 return (1); 488 } 489 490 void 491 sblock_init(void) 492 { 493 494 fsreadfd = -1; 495 fswritefd = -1; 496 fsmodified = 0; 497 lfdir = 0; 498 initbarea(&sblk, BT_SUPERBLK); 499 sblk.b_un.b_buf = Malloc(SBLOCKSIZE); 500 if (sblk.b_un.b_buf == NULL) 501 errx(EEXIT, "cannot allocate space for superblock"); 502 dev_bsize = secsize = DEV_BSIZE; 503 } 504 505 /* 506 * Calculate a prototype superblock based on information in the boot area. 507 * When done the cgsblock macro can be calculated and the fs_ncg field 508 * can be used. Do NOT attempt to use other macros without verifying that 509 * their needed information is available! 510 */ 511 static int 512 calcsb(char *dev, int devfd, struct fs *fs) 513 { 514 struct fsrecovery *fsr; 515 char *fsrbuf; 516 u_int secsize; 517 518 /* 519 * We need fragments-per-group and the partition-size. 520 * 521 * Newfs stores these details at the end of the boot block area 522 * at the start of the filesystem partition. If they have been 523 * overwritten by a boot block, we fail. But usually they are 524 * there and we can use them. 525 */ 526 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1) 527 return (0); 528 fsrbuf = Malloc(secsize); 529 if (fsrbuf == NULL) 530 errx(EEXIT, "calcsb: cannot allocate recovery buffer"); 531 if (blread(devfd, fsrbuf, 532 (SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0) { 533 free(fsrbuf); 534 return (0); 535 } 536 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr]; 537 if (fsr->fsr_magic != FS_UFS2_MAGIC) { 538 free(fsrbuf); 539 return (0); 540 } 541 memset(fs, 0, sizeof(struct fs)); 542 fs->fs_fpg = fsr->fsr_fpg; 543 fs->fs_fsbtodb = fsr->fsr_fsbtodb; 544 fs->fs_sblkno = fsr->fsr_sblkno; 545 fs->fs_magic = fsr->fsr_magic; 546 fs->fs_ncg = fsr->fsr_ncg; 547 free(fsrbuf); 548 return (1); 549 } 550 551 /* 552 * Check to see if recovery information exists. 553 * Return 1 if it exists or cannot be created. 554 * Return 0 if it does not exist and can be created. 555 */ 556 static int 557 chkrecovery(int devfd) 558 { 559 struct fsrecovery *fsr; 560 char *fsrbuf; 561 u_int secsize, rdsize; 562 563 /* 564 * Could not determine if backup material exists, so do not 565 * offer to create it. 566 */ 567 fsrbuf = NULL; 568 rdsize = sblock.fs_fsize; 569 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 || 570 rdsize % secsize != 0 || 571 (fsrbuf = Malloc(rdsize)) == NULL || 572 blread(devfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, 573 rdsize) != 0) { 574 free(fsrbuf); 575 return (1); 576 } 577 /* 578 * Recovery material has already been created, so do not 579 * need to create it again. 580 */ 581 fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr]; 582 if (fsr->fsr_magic == FS_UFS2_MAGIC) { 583 free(fsrbuf); 584 return (1); 585 } 586 /* 587 * Recovery material has not been created and can be if desired. 588 */ 589 free(fsrbuf); 590 return (0); 591 } 592 593 /* 594 * Read the last filesystem-size piece of the boot block, replace the 595 * last 20 bytes with the recovery information, then write it back. 596 * The recovery information only works for UFS2 filesystems. 597 */ 598 static void 599 saverecovery(int readfd, int writefd) 600 { 601 struct fsrecovery *fsr; 602 char *fsrbuf; 603 u_int secsize, rdsize; 604 605 fsrbuf = NULL; 606 rdsize = sblock.fs_fsize; 607 if (sblock.fs_magic != FS_UFS2_MAGIC || 608 ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 || 609 rdsize % secsize != 0 || 610 (fsrbuf = Malloc(rdsize)) == NULL || 611 blread(readfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, 612 rdsize) != 0) { 613 printf("RECOVERY DATA COULD NOT BE CREATED\n"); 614 free(fsrbuf); 615 return; 616 } 617 fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr]; 618 fsr->fsr_magic = sblock.fs_magic; 619 fsr->fsr_fpg = sblock.fs_fpg; 620 fsr->fsr_fsbtodb = sblock.fs_fsbtodb; 621 fsr->fsr_sblkno = sblock.fs_sblkno; 622 fsr->fsr_ncg = sblock.fs_ncg; 623 blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, rdsize); 624 free(fsrbuf); 625 } 626