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 #endif 34 #include <sys/cdefs.h> 35 #include <sys/param.h> 36 #include <sys/disk.h> 37 #include <sys/stat.h> 38 #define FSTYPENAMES 39 #include <sys/disklabel.h> 40 #include <sys/file.h> 41 #include <sys/sysctl.h> 42 43 #include <ufs/ufs/dinode.h> 44 #include <ufs/ffs/fs.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <limits.h> 50 #include <stdint.h> 51 #include <string.h> 52 53 #include "fsck.h" 54 55 struct inohash *inphash; /* hash list of directory inode info */ 56 struct inoinfo **inpsort; /* disk order list of directory inodes */ 57 struct inode snaplist[FSMAXSNAP + 1]; /* list of active snapshots */ 58 int snapcnt; /* number of active snapshots */ 59 char *copybuf; /* buffer to copy snapshot blocks */ 60 61 static int sbhashfailed; 62 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 63 64 static int calcsb(char *dev, int devfd, struct fs *fs); 65 static void saverecovery(int readfd, int writefd); 66 static int chkrecovery(int devfd); 67 static int getlbnblkno(struct inodesc *); 68 static int checksnapinfo(struct inode *); 69 70 /* 71 * Read in a superblock finding an alternate if necessary. 72 * Return 1 if successful, 0 if unsuccessful, -1 if file system 73 * is already clean (ckclean and preen mode only). 74 */ 75 int 76 setup(char *dev) 77 { 78 long i, bmapsize; 79 struct inode ip; 80 81 /* 82 * We are expected to have an open file descriptor and a superblock. 83 */ 84 if (fsreadfd < 0 || havesb == 0) { 85 if (debug) { 86 if (fsreadfd < 0) 87 printf("setup: missing fsreadfd\n"); 88 else 89 printf("setup: missing superblock\n"); 90 } 91 return (0); 92 } 93 if (preen == 0) 94 printf("** %s", dev); 95 if (bkgrdflag == 0 && 96 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 97 fswritefd = -1; 98 if (preen) 99 pfatal("NO WRITE ACCESS"); 100 printf(" (NO WRITE)"); 101 } 102 if (preen == 0) 103 printf("\n"); 104 if (sbhashfailed != 0) { 105 pwarn("SUPERBLOCK CHECK HASH FAILED"); 106 if (fswritefd == -1) 107 pwarn("OPENED READONLY SO CANNOT CORRECT CHECK HASH\n"); 108 else if (preen || reply("CORRECT CHECK HASH") != 0) { 109 if (preen) 110 printf(" (CORRECTED)\n"); 111 sblock.fs_clean = 0; 112 sbdirty(); 113 } 114 } 115 if (skipclean && ckclean && sblock.fs_clean) { 116 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 117 return (-1); 118 } 119 maxfsblock = sblock.fs_size; 120 maxino = sblock.fs_ncg * sblock.fs_ipg; 121 /* 122 * Check and potentially fix certain fields in the super block. 123 */ 124 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 125 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 126 if (reply("SET TO DEFAULT") == 1) { 127 sblock.fs_optim = FS_OPTTIME; 128 sbdirty(); 129 } 130 } 131 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 132 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 133 sblock.fs_minfree); 134 if (reply("SET TO DEFAULT") == 1) { 135 sblock.fs_minfree = 10; 136 sbdirty(); 137 } 138 } 139 if (sblock.fs_magic == FS_UFS1_MAGIC && 140 sblock.fs_old_inodefmt < FS_44INODEFMT) { 141 pwarn("Format of file system is too old.\n"); 142 pwarn("Must update to modern format using a version of fsck\n"); 143 pfatal("from before 2002 with the command ``fsck -c 2''\n"); 144 exit(EEXIT); 145 } 146 if (preen == 0 && yflag == 0 && sblock.fs_magic == FS_UFS2_MAGIC && 147 fswritefd != -1 && chkrecovery(fsreadfd) == 0 && 148 reply("SAVE DATA TO FIND ALTERNATE SUPERBLOCKS") != 0) 149 saverecovery(fsreadfd, fswritefd); 150 /* 151 * allocate and initialize the necessary maps 152 */ 153 bufinit(); 154 bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); 155 blockmap = Calloc((unsigned)bmapsize, sizeof (char)); 156 if (blockmap == NULL) { 157 printf("cannot alloc %u bytes for blockmap\n", 158 (unsigned)bmapsize); 159 goto badsb; 160 } 161 inostathead = Calloc(sblock.fs_ncg, sizeof(struct inostatlist)); 162 if (inostathead == NULL) { 163 printf("cannot alloc %u bytes for inostathead\n", 164 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 165 goto badsb; 166 } 167 numdirs = sblock.fs_cstotal.cs_ndir; 168 dirhash = MAX(numdirs / 2, 1); 169 inplast = 0; 170 listmax = numdirs + 10; 171 inpsort = (struct inoinfo **)Calloc(listmax, sizeof(struct inoinfo *)); 172 inphash = (struct inohash *)Calloc(dirhash, sizeof(struct inohash)); 173 if (inpsort == NULL || inphash == NULL) { 174 printf("cannot alloc %ju bytes for inphash\n", 175 (uintmax_t)numdirs * sizeof(struct inoinfo *)); 176 goto badsb; 177 } 178 if (sblock.fs_flags & FS_DOSOFTDEP) 179 usedsoftdep = 1; 180 else 181 usedsoftdep = 0; 182 /* 183 * Collect any snapshot inodes so that we can allow them to 184 * claim any blocks that we free. The code for doing this is 185 * imported here and into inode.c from sys/ufs/ffs/ffs_snapshot.c. 186 */ 187 for (snapcnt = 0; snapcnt < FSMAXSNAP; snapcnt++) { 188 if (sblock.fs_snapinum[snapcnt] == 0) 189 break; 190 ginode(sblock.fs_snapinum[snapcnt], &ip); 191 if ((DIP(ip.i_dp, di_mode) & IFMT) == IFREG && 192 (DIP(ip.i_dp, di_flags) & SF_SNAPSHOT) != 0 && 193 checksnapinfo(&ip)) { 194 if (debug) 195 printf("Load snapshot %jd\n", 196 (intmax_t)sblock.fs_snapinum[snapcnt]); 197 snaplist[snapcnt] = ip; 198 continue; 199 } 200 printf("Removing non-snapshot inode %ju from snapshot list\n", 201 (uintmax_t)sblock.fs_snapinum[snapcnt]); 202 irelse(&ip); 203 for (i = snapcnt + 1; i < FSMAXSNAP; i++) { 204 if (sblock.fs_snapinum[i] == 0) 205 break; 206 sblock.fs_snapinum[i - 1] = sblock.fs_snapinum[i]; 207 } 208 sblock.fs_snapinum[i - 1] = 0; 209 snapcnt--; 210 sbdirty(); 211 } 212 if (snapcnt > 0 && copybuf == NULL) { 213 copybuf = Balloc(sblock.fs_bsize); 214 if (copybuf == NULL) 215 errx(EEXIT, "cannot allocate space for snapshot " 216 "copy buffer"); 217 } 218 return (1); 219 220 badsb: 221 ckfini(0); 222 return (0); 223 } 224 225 /* 226 * Check for valid snapshot information. 227 * 228 * Each snapshot has a list of blocks that have been copied. This list 229 * is consulted before checking the snapshot inode. Its purpose is to 230 * speed checking of commonly checked blocks and to avoid recursive 231 * checks of the snapshot inode. In particular, the list must contain 232 * the superblock, the superblock summary information, and all the 233 * cylinder group blocks. The list may contain other commonly checked 234 * pointers such as those of the blocks that contain the snapshot inodes. 235 * The list is sorted into block order to allow binary search lookup. 236 * 237 * The twelve direct direct block pointers of the snapshot are always 238 * copied, so we test for them first before checking the list itself 239 * (i.e., they are not in the list). 240 * 241 * The checksnapinfo() routine needs to ensure that the list contains at 242 * least the super block, its summary information, and the cylinder groups. 243 * Here we check the list first for the superblock, zero or more cylinder 244 * groups up to the location of the superblock summary information, the 245 * summary group information, and any remaining cylinder group maps that 246 * follow it. We skip over any other entries in the list. 247 */ 248 #define CHKBLKINLIST(chkblk) \ 249 /* All UFS_NDADDR blocks are copied */ \ 250 if ((chkblk) >= UFS_NDADDR) { \ 251 /* Skip over blocks that are not of interest */ \ 252 while (*blkp < (chkblk) && blkp < lastblkp) \ 253 blkp++; \ 254 /* Fail if end of list and not all blocks found */ \ 255 if (blkp >= lastblkp) { \ 256 pwarn("UFS%d snapshot inode %jd failed: " \ 257 "improper block list length (%jd)\n", \ 258 sblock.fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 259 (intmax_t)snapip->i_number, \ 260 (intmax_t)(lastblkp - &snapblklist[0])); \ 261 status = 0; \ 262 } \ 263 /* Fail if block we seek is missing */ \ 264 else if (*blkp++ != (chkblk)) { \ 265 pwarn("UFS%d snapshot inode %jd failed: " \ 266 "block list (%jd) != %s (%jd)\n", \ 267 sblock.fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 268 (intmax_t)snapip->i_number, \ 269 (intmax_t)blkp[-1], #chkblk, \ 270 (intmax_t)chkblk); \ 271 status = 0; \ 272 } \ 273 } 274 275 static int 276 checksnapinfo(struct inode *snapip) 277 { 278 struct fs *fs; 279 struct bufarea *bp; 280 struct inodesc idesc; 281 daddr_t *snapblklist, *blkp, *lastblkp, csblkno; 282 int cg, loc, len, status; 283 ufs_lbn_t lbn; 284 size_t size; 285 286 fs = &sblock; 287 memset(&idesc, 0, sizeof(struct inodesc)); 288 idesc.id_type = ADDR; 289 idesc.id_func = getlbnblkno; 290 idesc.id_number = snapip->i_number; 291 lbn = howmany(fs->fs_size, fs->fs_frag); 292 idesc.id_parent = lbn; /* sought after blkno */ 293 if ((ckinode(snapip->i_dp, &idesc) & FOUND) == 0) 294 return (0); 295 size = fragroundup(fs, 296 DIP(snapip->i_dp, di_size) - lblktosize(fs, lbn)); 297 bp = getdatablk(idesc.id_parent, size, BT_DATA); 298 if (bp->b_errs != 0) 299 return (0); 300 snapblklist = (daddr_t *)bp->b_un.b_buf; 301 /* 302 * snapblklist[0] is the size of the list 303 * snapblklist[1] is the first element of the list 304 * 305 * We need to be careful to bound the size of the list and verify 306 * that we have not run off the end of it if it or its size has 307 * been corrupted. 308 */ 309 blkp = &snapblklist[1]; 310 lastblkp = &snapblklist[MAX(0, 311 MIN(snapblklist[0] + 1, size / sizeof(daddr_t)))]; 312 status = 1; 313 /* Check that the superblock is listed. */ 314 CHKBLKINLIST(lblkno(fs, fs->fs_sblockloc)); 315 if (status == 0) 316 goto out; 317 /* 318 * Calculate where the summary information is located. 319 * Usually it is in the first cylinder group, but growfs 320 * may move it to the first cylinder group that it adds. 321 * 322 * Check all cylinder groups up to the summary information. 323 */ 324 csblkno = fragstoblks(fs, fs->fs_csaddr); 325 for (cg = 0; cg < fs->fs_ncg; cg++) { 326 if (fragstoblks(fs, cgtod(fs, cg)) > csblkno) 327 break; 328 CHKBLKINLIST(fragstoblks(fs, cgtod(fs, cg))); 329 if (status == 0) 330 goto out; 331 } 332 /* Check the summary information block(s). */ 333 len = howmany(fs->fs_cssize, fs->fs_bsize); 334 for (loc = 0; loc < len; loc++) { 335 CHKBLKINLIST(csblkno + loc); 336 if (status == 0) 337 goto out; 338 } 339 /* Check the remaining cylinder groups. */ 340 for (; cg < fs->fs_ncg; cg++) { 341 CHKBLKINLIST(fragstoblks(fs, cgtod(fs, cg))); 342 if (status == 0) 343 goto out; 344 } 345 out: 346 brelse(bp); 347 return (status); 348 } 349 350 /* 351 * Return the block number associated with a specified inode lbn. 352 * Requested lbn is in id_parent. If found, block is returned in 353 * id_parent. 354 */ 355 static int 356 getlbnblkno(struct inodesc *idesc) 357 { 358 359 if (idesc->id_lbn < idesc->id_parent) 360 return (KEEPON); 361 idesc->id_parent = idesc->id_blkno; 362 return (STOP | FOUND); 363 } 364 365 /* 366 * Open a device or file to be checked by fsck. 367 */ 368 int 369 openfilesys(char *dev) 370 { 371 struct stat statb; 372 int saved_fsreadfd; 373 374 if (stat(dev, &statb) < 0) 375 return (0); 376 if ((statb.st_mode & S_IFMT) != S_IFCHR && 377 (statb.st_mode & S_IFMT) != S_IFBLK) { 378 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 379 pwarn("BACKGROUND FSCK LACKS A SNAPSHOT\n"); 380 return (0); 381 } 382 if (bkgrdflag != 0) { 383 cursnapshot = statb.st_ino; 384 } else { 385 pwarn("%s IS NOT A DISK DEVICE\n", dev); 386 if (preen || reply("CONTINUE") == 0) 387 return (0); 388 } 389 } 390 saved_fsreadfd = fsreadfd; 391 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 392 fsreadfd = saved_fsreadfd; 393 return (0); 394 } 395 if (saved_fsreadfd != -1) 396 close(saved_fsreadfd); 397 return (1); 398 } 399 400 /* 401 * Read in the super block and its summary info. 402 */ 403 int 404 readsb(void) 405 { 406 struct fs *fs; 407 408 sbhashfailed = 0; 409 readcnt[sblk.b_type]++; 410 /* 411 * If bflag is given, then check just that superblock. 412 */ 413 if (bflag) { 414 switch (sbget(fsreadfd, &fs, bflag * dev_bsize, 0)) { 415 case 0: 416 goto goodsb; 417 case EINTEGRITY: 418 printf("Check hash failed for superblock at %jd\n", 419 bflag); 420 return (0); 421 case ENOENT: 422 printf("%jd is not a file system superblock\n", bflag); 423 return (0); 424 case EIO: 425 default: 426 printf("I/O error reading %jd\n", bflag); 427 return (0); 428 } 429 } 430 /* 431 * Check for the standard superblock and use it if good. 432 */ 433 if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG) == 0) 434 goto goodsb; 435 /* 436 * Check if the only problem is a check-hash failure. 437 */ 438 skipclean = 0; 439 if (sbget(fsreadfd, &fs, UFS_STDSB, UFS_NOMSG | UFS_NOHASHFAIL) == 0) { 440 sbhashfailed = 1; 441 goto goodsb; 442 } 443 /* 444 * Do an exhaustive search for a usable superblock. 445 */ 446 switch (sbsearch(fsreadfd, &fs, 0)) { 447 case 0: 448 goto goodsb; 449 case ENOENT: 450 printf("SEARCH FOR ALTERNATE SUPER-BLOCK FAILED. " 451 "YOU MUST USE THE\n-b OPTION TO FSCK TO SPECIFY " 452 "THE LOCATION OF AN ALTERNATE\nSUPER-BLOCK TO " 453 "SUPPLY NEEDED INFORMATION; SEE fsck_ffs(8).\n"); 454 return (0); 455 case EIO: 456 default: 457 printf("I/O error reading a usable superblock\n"); 458 return (0); 459 } 460 461 goodsb: 462 memcpy(&sblock, fs, fs->fs_sbsize); 463 free(fs); 464 /* 465 * Compute block size that the file system is based on, 466 * according to fsbtodb, and adjust superblock block number 467 * so we can tell if this is an alternate later. 468 */ 469 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 470 sblk.b_bno = sblock.fs_sblockactualloc / dev_bsize; 471 sblk.b_size = SBLOCKSIZE; 472 /* 473 * If not yet done, update UFS1 superblock with new wider fields. 474 */ 475 if (sblock.fs_magic == FS_UFS1_MAGIC && 476 sblock.fs_maxbsize != sblock.fs_bsize) { 477 sblock.fs_maxbsize = sblock.fs_bsize; 478 sblock.fs_time = sblock.fs_old_time; 479 sblock.fs_size = sblock.fs_old_size; 480 sblock.fs_dsize = sblock.fs_old_dsize; 481 sblock.fs_csaddr = sblock.fs_old_csaddr; 482 sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 483 sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 484 sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 485 sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 486 } 487 havesb = 1; 488 return (1); 489 } 490 491 void 492 sblock_init(void) 493 { 494 495 fsreadfd = -1; 496 fswritefd = -1; 497 fsmodified = 0; 498 lfdir = 0; 499 initbarea(&sblk, BT_SUPERBLK); 500 sblk.b_un.b_buf = Balloc(SBLOCKSIZE); 501 if (sblk.b_un.b_buf == NULL) 502 errx(EEXIT, "cannot allocate space for superblock"); 503 dev_bsize = secsize = DEV_BSIZE; 504 } 505 506 /* 507 * Calculate a prototype superblock based on information in the boot area. 508 * When done the cgsblock macro can be calculated and the fs_ncg field 509 * can be used. Do NOT attempt to use other macros without verifying that 510 * their needed information is available! 511 */ 512 static int 513 calcsb(char *dev, int devfd, struct fs *fs) 514 { 515 struct fsrecovery *fsr; 516 char *fsrbuf; 517 u_int secsize; 518 519 /* 520 * We need fragments-per-group and the partition-size. 521 * 522 * Newfs stores these details at the end of the boot block area 523 * at the start of the filesystem partition. If they have been 524 * overwritten by a boot block, we fail. But usually they are 525 * there and we can use them. 526 */ 527 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1) 528 return (0); 529 fsrbuf = Balloc(secsize); 530 if (fsrbuf == NULL) 531 errx(EEXIT, "calcsb: cannot allocate recovery buffer"); 532 if (blread(devfd, fsrbuf, 533 (SBLOCK_UFS2 - secsize) / dev_bsize, secsize) != 0) { 534 free(fsrbuf); 535 return (0); 536 } 537 fsr = (struct fsrecovery *)&fsrbuf[secsize - sizeof *fsr]; 538 if (fsr->fsr_magic != FS_UFS2_MAGIC) { 539 free(fsrbuf); 540 return (0); 541 } 542 memset(fs, 0, sizeof(struct fs)); 543 fs->fs_fpg = fsr->fsr_fpg; 544 fs->fs_fsbtodb = fsr->fsr_fsbtodb; 545 fs->fs_sblkno = fsr->fsr_sblkno; 546 fs->fs_magic = fsr->fsr_magic; 547 fs->fs_ncg = fsr->fsr_ncg; 548 free(fsrbuf); 549 return (1); 550 } 551 552 /* 553 * Check to see if recovery information exists. 554 * Return 1 if it exists or cannot be created. 555 * Return 0 if it does not exist and can be created. 556 */ 557 static int 558 chkrecovery(int devfd) 559 { 560 struct fsrecovery *fsr; 561 char *fsrbuf; 562 u_int secsize, rdsize; 563 564 /* 565 * Could not determine if backup material exists, so do not 566 * offer to create it. 567 */ 568 fsrbuf = NULL; 569 rdsize = sblock.fs_fsize; 570 if (ioctl(devfd, DIOCGSECTORSIZE, &secsize) == -1 || 571 rdsize % secsize != 0 || 572 (fsrbuf = Balloc(rdsize)) == NULL || 573 blread(devfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, 574 rdsize) != 0) { 575 free(fsrbuf); 576 return (1); 577 } 578 /* 579 * Recovery material has already been created, so do not 580 * need to create it again. 581 */ 582 fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr]; 583 if (fsr->fsr_magic == FS_UFS2_MAGIC) { 584 free(fsrbuf); 585 return (1); 586 } 587 /* 588 * Recovery material has not been created and can be if desired. 589 */ 590 free(fsrbuf); 591 return (0); 592 } 593 594 /* 595 * Read the last filesystem-size piece of the boot block, replace the 596 * last 20 bytes with the recovery information, then write it back. 597 * The recovery information only works for UFS2 filesystems. 598 */ 599 static void 600 saverecovery(int readfd, int writefd) 601 { 602 struct fsrecovery *fsr; 603 char *fsrbuf; 604 u_int secsize, rdsize; 605 606 fsrbuf = NULL; 607 rdsize = sblock.fs_fsize; 608 if (sblock.fs_magic != FS_UFS2_MAGIC || 609 ioctl(readfd, DIOCGSECTORSIZE, &secsize) == -1 || 610 rdsize % secsize != 0 || 611 (fsrbuf = Balloc(rdsize)) == NULL || 612 blread(readfd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, 613 rdsize) != 0) { 614 printf("RECOVERY DATA COULD NOT BE CREATED\n"); 615 free(fsrbuf); 616 return; 617 } 618 fsr = (struct fsrecovery *)&fsrbuf[rdsize - sizeof *fsr]; 619 fsr->fsr_magic = sblock.fs_magic; 620 fsr->fsr_fpg = sblock.fs_fpg; 621 fsr->fsr_fsbtodb = sblock.fs_fsbtodb; 622 fsr->fsr_sblkno = sblock.fs_sblkno; 623 fsr->fsr_ncg = sblock.fs_ncg; 624 blwrite(writefd, fsrbuf, (SBLOCK_UFS2 - rdsize) / dev_bsize, rdsize); 625 free(fsrbuf); 626 } 627