1 /* $OpenBSD: setup.c,v 1.35 2024/12/18 10:36:05 sthen Exp $ */ 2 /* $NetBSD: setup.c,v 1.1 1997/06/11 11:22:01 bouyer Exp $ */ 3 4 /* 5 * Copyright (c) 1997 Manuel Bouyer. 6 * Copyright (c) 1980, 1986, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #define DKTYPENAMES 35 #include <sys/param.h> /* DEV_BSIZE roundup */ 36 #include <sys/time.h> 37 #include <ufs/ext2fs/ext2fs_dinode.h> 38 #include <ufs/ext2fs/ext2fs.h> 39 #include <sys/stat.h> 40 #include <sys/ioctl.h> 41 #include <sys/dkio.h> 42 #include <sys/disklabel.h> 43 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include <util.h> 50 #include <string.h> 51 #include <ctype.h> 52 #include <err.h> 53 54 #include "fsck.h" 55 #include "extern.h" 56 #include "fsutil.h" 57 58 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 59 60 void badsb(int, char *); 61 int calcsb(char *, int, struct m_ext2fs *, struct disklabel *); 62 static struct disklabel *getdisklabel(char *, int); 63 static int readsb(int); 64 static char rdevname[PATH_MAX]; 65 66 int 67 setup(char *dev) 68 { 69 long cg, asked, i; 70 long bmapsize; 71 struct disklabel *lp; 72 off_t sizepb; 73 struct stat statb; 74 struct m_ext2fs proto; 75 char *realdev; 76 int doskipclean; 77 u_int64_t maxfilesize; 78 79 havesb = 0; 80 fswritefd = -1; 81 doskipclean = skipclean; 82 if ((fsreadfd = opendev(dev, O_RDONLY, 0, &realdev)) == -1) { 83 printf("Can't open %s: %s\n", dev, strerror(errno)); 84 return (0); 85 } 86 if (strncmp(dev, realdev, PATH_MAX) != 0) { 87 blockcheck(unrawname(realdev)); 88 strlcpy(rdevname, realdev, sizeof(rdevname)); 89 setcdevname(rdevname, dev, preen); 90 } 91 if (fstat(fsreadfd, &statb) == -1) { 92 printf("Can't stat %s: %s\n", realdev, strerror(errno)); 93 return (0); 94 } 95 if (!S_ISCHR(statb.st_mode)) { 96 pfatal("%s is not a character device", realdev); 97 if (reply("CONTINUE") == 0) { 98 close(fsreadfd); 99 return (0); 100 } 101 } 102 if (preen == 0) 103 printf("** %s", realdev); 104 if (nflag || (fswritefd = opendev(dev, O_WRONLY, 0, NULL)) == -1) { 105 fswritefd = -1; 106 if (preen) 107 pfatal("NO WRITE ACCESS"); 108 printf(" (NO WRITE)"); 109 } 110 if (preen == 0) 111 printf("\n"); 112 fsmodified = 0; 113 lfdir = 0; 114 initbarea(&sblk); 115 initbarea(&asblk); 116 sblk.b_un.b_buf = malloc(SBSIZE); 117 asblk.b_un.b_buf = malloc(SBSIZE); 118 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 119 errexit("cannot allocate space for superblock\n"); 120 if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) 121 secsize = lp->d_secsize; 122 else 123 secsize = DEV_BSIZE; 124 125 if (!hotroot()) { 126 #ifndef SMALL 127 if (pledge("stdio getpw", NULL) == -1) 128 err(1, "pledge"); 129 #else 130 if (pledge("stdio", NULL) == -1) 131 err(1, "pledge"); 132 #endif 133 } 134 135 /* 136 * Read in the superblock, looking for alternates if necessary 137 */ 138 if (readsb(1) == 0) { 139 if (bflag || preen || calcsb(realdev, fsreadfd, &proto, lp) == 0) 140 return(0); 141 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 142 return (0); 143 for (cg = 1; cg < proto.e2fs_ncg; cg++) { 144 bflag = fsbtodb(&proto, 145 cg * proto.e2fs.e2fs_bpg + proto.e2fs.e2fs_first_dblock); 146 if (readsb(0) != 0) 147 break; 148 } 149 if (cg >= proto.e2fs_ncg) { 150 printf("%s %s\n%s %s\n%s %s\n", 151 "SEARCH FOR ALTERNATE SUPER-BLOCK", 152 "FAILED. YOU MUST USE THE", 153 "-b OPTION TO FSCK_FFS TO SPECIFY THE", 154 "LOCATION OF AN ALTERNATE", 155 "SUPER-BLOCK TO SUPPLY NEEDED", 156 "INFORMATION; SEE fsck_ext2fs(8)."); 157 return(0); 158 } 159 doskipclean = 0; 160 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 161 } 162 if (debug) 163 printf("state = %d\n", sblock.e2fs.e2fs_state); 164 if (sblock.e2fs.e2fs_state == E2FS_ISCLEAN) { 165 if (doskipclean) { 166 pwarn("%sile system is clean; not checking\n", 167 preen ? "f" : "** F"); 168 return (-1); 169 } 170 if (!preen) 171 pwarn("** File system is already clean\n"); 172 } 173 maxfsblock = sblock.e2fs.e2fs_bcount; 174 maxino = sblock.e2fs_ncg * sblock.e2fs.e2fs_ipg; 175 sizepb = sblock.e2fs_bsize; 176 maxfilesize = sblock.e2fs_bsize * NDADDR - 1; 177 for (i = 0; i < NIADDR; i++) { 178 sizepb *= NINDIR(&sblock); 179 maxfilesize += sizepb; 180 } 181 /* 182 * Check and potentially fix certain fields in the super block. 183 */ 184 if (/* (sblock.e2fs.e2fs_rbcount < 0) || */ 185 (sblock.e2fs.e2fs_rbcount > sblock.e2fs.e2fs_bcount)) { 186 pfatal("IMPOSSIBLE RESERVED BLOCK COUNT=%d IN SUPERBLOCK", 187 sblock.e2fs.e2fs_rbcount); 188 if (reply("SET TO DEFAULT") == 1) { 189 sblock.e2fs.e2fs_rbcount = sblock.e2fs.e2fs_bcount * 0.1; 190 sbdirty(); 191 dirty(&asblk); 192 } 193 } 194 if (sblock.e2fs.e2fs_bpg != sblock.e2fs.e2fs_fpg) { 195 pfatal("WRONG FPG=%d (BPG=%d) IN SUPERBLOCK", 196 sblock.e2fs.e2fs_fpg, sblock.e2fs.e2fs_bpg); 197 return 0; 198 } 199 if (asblk.b_dirty && !bflag) { 200 copyback_sb(&asblk); 201 flush(fswritefd, &asblk); 202 } 203 /* 204 * read in the summary info. 205 */ 206 207 sblock.e2fs_gd = calloc(sblock.e2fs_ngdb, sblock.e2fs_bsize); 208 if (sblock.e2fs_gd == NULL) 209 errexit("out of memory\n"); 210 asked = 0; 211 for (i=0; i < sblock.e2fs_ngdb; i++) { 212 if (bread(fsreadfd,(char *) 213 &sblock.e2fs_gd[i* sblock.e2fs_bsize / sizeof(struct ext2_gd)], 214 fsbtodb(&sblock, ((sblock.e2fs_bsize>1024)?0:1)+i+1), 215 sblock.e2fs_bsize) != 0 && !asked) { 216 pfatal("BAD SUMMARY INFORMATION"); 217 if (reply("CONTINUE") == 0) 218 errexit("%s\n", ""); 219 asked++; 220 } 221 } 222 /* 223 * allocate and initialize the necessary maps 224 */ 225 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 226 blockmap = calloc((unsigned)bmapsize, sizeof (char)); 227 if (blockmap == NULL) { 228 printf("cannot alloc %u bytes for blockmap\n", 229 (unsigned)bmapsize); 230 goto badsblabel; 231 } 232 statemap = calloc((unsigned)(maxino + 2), sizeof(char)); 233 if (statemap == NULL) { 234 printf("cannot alloc %u bytes for statemap\n", 235 (unsigned)(maxino + 1)); 236 goto badsblabel; 237 } 238 typemap = calloc((unsigned)(maxino + 1), sizeof(u_char)); 239 if (typemap == NULL) { 240 printf("cannot alloc %u bytes for typemap\n", 241 (unsigned)(maxino + 1)); 242 goto badsblabel; 243 } 244 lncntp = calloc((unsigned)(maxino + 1), sizeof(int16_t)); 245 if (lncntp == NULL) { 246 printf("cannot alloc %u bytes for lncntp\n", 247 (unsigned)((maxino + 1) * sizeof(int16_t))); 248 goto badsblabel; 249 } 250 for (numdirs = 0, cg = 0; cg < sblock.e2fs_ncg; cg++) { 251 numdirs += letoh16(sblock.e2fs_gd[cg].ext2bgd_ndirs); 252 } 253 inplast = 0; 254 listmax = numdirs + 10; 255 inpsort = calloc((unsigned)listmax, sizeof(struct inoinfo *)); 256 inphead = calloc((unsigned)numdirs, sizeof(struct inoinfo *)); 257 if (inpsort == NULL || inphead == NULL) { 258 printf("cannot alloc %u bytes for inphead\n", 259 (unsigned)(numdirs * sizeof(struct inoinfo *))); 260 goto badsblabel; 261 } 262 bufinit(); 263 return (1); 264 265 badsblabel: 266 ckfini(0); 267 return (0); 268 } 269 270 /* 271 * Read in the super block and its summary info. 272 */ 273 static int 274 readsb(int listerr) 275 { 276 daddr32_t super = bflag ? bflag : SBOFF / DEV_BSIZE; 277 278 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 279 return (0); 280 sblk.b_bno = super; 281 sblk.b_size = SBSIZE; 282 283 /* Copy the superblock in memory */ 284 e2fs_sbload(sblk.b_un.b_fs, &sblock.e2fs); 285 286 /* 287 * run a few consistency checks of the super block 288 */ 289 if (sblock.e2fs.e2fs_magic != E2FS_MAGIC) { 290 badsb(listerr, "MAGIC NUMBER WRONG"); return (0); 291 } 292 if (sblock.e2fs.e2fs_log_bsize > 2) { 293 badsb(listerr, "BAD LOG_BSIZE"); return (0); 294 } 295 if (sblock.e2fs.e2fs_bpg == 0) { 296 badsb(listerr, "BAD BLOCKS PER GROUP"); return (0); 297 } 298 299 /* compute the dynamic fields of the in-memory sb */ 300 /* compute dynamic sb infos */ 301 sblock.e2fs_ncg = 302 howmany(sblock.e2fs.e2fs_bcount - sblock.e2fs.e2fs_first_dblock, 303 sblock.e2fs.e2fs_bpg); 304 /* XXX assume hw bsize = 512 */ 305 sblock.e2fs_fsbtodb = sblock.e2fs.e2fs_log_bsize + 1; 306 sblock.e2fs_bsize = 1024 << sblock.e2fs.e2fs_log_bsize; 307 sblock.e2fs_bshift = LOG_MINBSIZE + sblock.e2fs.e2fs_log_bsize; 308 sblock.e2fs_qbmask = sblock.e2fs_bsize - 1; 309 sblock.e2fs_bmask = ~sblock.e2fs_qbmask; 310 sblock.e2fs_ngdb = howmany(sblock.e2fs_ncg, 311 sblock.e2fs_bsize / sizeof(struct ext2_gd)); 312 sblock.e2fs_ipb = sblock.e2fs_bsize / EXT2_DINODE_SIZE(&sblock); 313 sblock.e2fs_itpg = sblock.e2fs.e2fs_ipg/sblock.e2fs_ipb; 314 315 /* 316 * Compute block size that the filesystem is based on, 317 * according to fsbtodb, and adjust superblock block number 318 * so we can tell if this is an alternate later. 319 */ 320 sblk.b_bno = super / DEV_BSIZE; 321 322 if (sblock.e2fs_ncg == 1) { 323 /* no alternate superblock; assume it's okey */ 324 havesb = 1; 325 return 1; 326 } 327 328 getblk(&asblk, 1 * sblock.e2fs.e2fs_bpg + sblock.e2fs.e2fs_first_dblock, 329 (long)SBSIZE); 330 if (asblk.b_errs) 331 return (0); 332 if (bflag) { 333 havesb = 1; 334 return (1); 335 } 336 337 /* 338 * Set all possible fields that could differ, then do check 339 * of whole super block against an alternate super block. 340 * When an alternate super-block is specified this check is skipped. 341 */ 342 asblk.b_un.b_fs->e2fs_rbcount = sblk.b_un.b_fs->e2fs_rbcount; 343 asblk.b_un.b_fs->e2fs_fbcount = sblk.b_un.b_fs->e2fs_fbcount; 344 asblk.b_un.b_fs->e2fs_ficount = sblk.b_un.b_fs->e2fs_ficount; 345 asblk.b_un.b_fs->e2fs_mtime = sblk.b_un.b_fs->e2fs_mtime; 346 asblk.b_un.b_fs->e2fs_wtime = sblk.b_un.b_fs->e2fs_wtime; 347 asblk.b_un.b_fs->e2fs_mnt_count = sblk.b_un.b_fs->e2fs_mnt_count; 348 asblk.b_un.b_fs->e2fs_max_mnt_count = sblk.b_un.b_fs->e2fs_max_mnt_count; 349 asblk.b_un.b_fs->e2fs_state = sblk.b_un.b_fs->e2fs_state; 350 asblk.b_un.b_fs->e2fs_beh = sblk.b_un.b_fs->e2fs_beh; 351 asblk.b_un.b_fs->e2fs_lastfsck = sblk.b_un.b_fs->e2fs_lastfsck; 352 asblk.b_un.b_fs->e2fs_fsckintv = sblk.b_un.b_fs->e2fs_fsckintv; 353 asblk.b_un.b_fs->e2fs_ruid = sblk.b_un.b_fs->e2fs_ruid; 354 asblk.b_un.b_fs->e2fs_rgid = sblk.b_un.b_fs->e2fs_rgid; 355 asblk.b_un.b_fs->e2fs_block_group_nr = 356 sblk.b_un.b_fs->e2fs_block_group_nr; 357 asblk.b_un.b_fs->e2fs_features_rocompat &= ~EXT2F_ROCOMPAT_LARGE_FILE; 358 asblk.b_un.b_fs->e2fs_features_rocompat |= 359 sblk.b_un.b_fs->e2fs_features_rocompat & EXT2F_ROCOMPAT_LARGE_FILE; 360 memcpy(asblk.b_un.b_fs->e2fs_fsmnt, sblk.b_un.b_fs->e2fs_fsmnt, 361 sizeof(sblk.b_un.b_fs->e2fs_fsmnt)); 362 asblk.b_un.b_fs->e2fs_kbytes_written = sblk.b_un.b_fs->e2fs_kbytes_written; 363 364 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 365 ((sblock.e2fs.e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP) || 366 (sblock.e2fs.e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP))) { 367 if (debug) { 368 printf("compat 0x%08x, incompat 0x%08x, compat_ro " 369 "0x%08x\n", 370 sblock.e2fs.e2fs_features_compat, 371 sblock.e2fs.e2fs_features_incompat, 372 sblock.e2fs.e2fs_features_rocompat); 373 } 374 badsb(listerr,"INCOMPATIBLE FEATURE BITS IN SUPER BLOCK"); 375 return 0; 376 } 377 if (memcmp(sblk.b_un.b_fs, asblk.b_un.b_fs, SBSIZE)) { 378 if (debug) { 379 u_int32_t *nlp, *olp, *endlp; 380 381 printf("superblock mismatches\n"); 382 nlp = (u_int32_t *)asblk.b_un.b_fs; 383 olp = (u_int32_t *)sblk.b_un.b_fs; 384 endlp = olp + (SBSIZE / sizeof *olp); 385 for ( ; olp < endlp; olp++, nlp++) { 386 if (*olp == *nlp) 387 continue; 388 printf("offset %ld, original %ld, alternate %ld\n", 389 (long)(olp - (u_int32_t *)sblk.b_un.b_fs), 390 (long)letoh32(*olp), 391 (long)letoh32(*nlp)); 392 } 393 } 394 badsb(listerr, 395 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 396 return (0); 397 } 398 havesb = 1; 399 return (1); 400 } 401 402 void 403 copyback_sb(struct bufarea *bp) 404 { 405 /* Copy the in-memory superblock back to buffer */ 406 bp->b_un.b_fs->e2fs_icount = letoh32(sblock.e2fs.e2fs_icount); 407 bp->b_un.b_fs->e2fs_bcount = letoh32(sblock.e2fs.e2fs_bcount); 408 bp->b_un.b_fs->e2fs_rbcount = letoh32(sblock.e2fs.e2fs_rbcount); 409 bp->b_un.b_fs->e2fs_fbcount = letoh32(sblock.e2fs.e2fs_fbcount); 410 bp->b_un.b_fs->e2fs_ficount = letoh32(sblock.e2fs.e2fs_ficount); 411 bp->b_un.b_fs->e2fs_first_dblock = 412 letoh32(sblock.e2fs.e2fs_first_dblock); 413 bp->b_un.b_fs->e2fs_log_bsize = letoh32(sblock.e2fs.e2fs_log_bsize); 414 bp->b_un.b_fs->e2fs_log_fsize = letoh32(sblock.e2fs.e2fs_log_fsize); 415 bp->b_un.b_fs->e2fs_bpg = letoh32(sblock.e2fs.e2fs_bpg); 416 bp->b_un.b_fs->e2fs_fpg = letoh32(sblock.e2fs.e2fs_fpg); 417 bp->b_un.b_fs->e2fs_ipg = letoh32(sblock.e2fs.e2fs_ipg); 418 bp->b_un.b_fs->e2fs_mtime = letoh32(sblock.e2fs.e2fs_mtime); 419 bp->b_un.b_fs->e2fs_wtime = letoh32(sblock.e2fs.e2fs_wtime); 420 bp->b_un.b_fs->e2fs_lastfsck = letoh32(sblock.e2fs.e2fs_lastfsck); 421 bp->b_un.b_fs->e2fs_fsckintv = letoh32(sblock.e2fs.e2fs_fsckintv); 422 bp->b_un.b_fs->e2fs_creator = letoh32(sblock.e2fs.e2fs_creator); 423 bp->b_un.b_fs->e2fs_rev = letoh32(sblock.e2fs.e2fs_rev); 424 bp->b_un.b_fs->e2fs_mnt_count = letoh16(sblock.e2fs.e2fs_mnt_count); 425 bp->b_un.b_fs->e2fs_max_mnt_count = 426 letoh16(sblock.e2fs.e2fs_max_mnt_count); 427 bp->b_un.b_fs->e2fs_magic = letoh16(sblock.e2fs.e2fs_magic); 428 bp->b_un.b_fs->e2fs_state = letoh16(sblock.e2fs.e2fs_state); 429 bp->b_un.b_fs->e2fs_beh = letoh16(sblock.e2fs.e2fs_beh); 430 bp->b_un.b_fs->e2fs_ruid = letoh16(sblock.e2fs.e2fs_ruid); 431 bp->b_un.b_fs->e2fs_rgid = letoh16(sblock.e2fs.e2fs_rgid); 432 } 433 434 void 435 badsb(int listerr, char *s) 436 { 437 438 if (!listerr) 439 return; 440 if (preen) 441 printf("%s: ", cdevname()); 442 pfatal("BAD SUPER BLOCK: %s\n", s); 443 } 444 445 /* 446 * Calculate a prototype superblock based on information in the disk label. 447 * When done the cgsblock macro can be calculated and the fs_ncg field 448 * can be used. Do NOT attempt to use other macros without verifying that 449 * their needed information is available! 450 */ 451 int 452 calcsb(char *dev, int devfd, struct m_ext2fs *fs, struct disklabel *lp) 453 { 454 struct partition *pp; 455 char *cp; 456 457 cp = strchr(dev, '\0'); 458 if ((cp == NULL || (cp[-1] < 'a' || cp[-1] >= 'a' + MAXPARTITIONS)) && 459 !isdigit((unsigned char)cp[-1])) { 460 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 461 return (0); 462 } 463 cp--; 464 if (lp == NULL) 465 pfatal("%s: CANNOT READ DISKLABEL\n", dev); 466 if (isdigit((unsigned char)*cp)) 467 pp = &lp->d_partitions[0]; 468 else 469 pp = &lp->d_partitions[*cp - 'a']; 470 if (pp->p_fstype != FS_EXT2FS) { 471 pfatal("%s: NOT LABELED AS A EXT2 FILE SYSTEM (%s)\n", 472 dev, pp->p_fstype < FSMAXTYPES ? 473 fstypenames[pp->p_fstype] : "unknown"); 474 return (0); 475 } 476 memset(fs, 0, sizeof(struct m_ext2fs)); 477 fs->e2fs_bsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock); /* XXX */ 478 if (fs->e2fs_bsize == 0) { 479 pfatal("%s: BLOCK SIZE DETERMINED TO BE ZERO\n", dev); 480 return (0); 481 } 482 fs->e2fs.e2fs_log_bsize = fs->e2fs_bsize / 1024; 483 fs->e2fs.e2fs_bcount = (pp->p_size * DEV_BSIZE) / fs->e2fs_bsize; 484 fs->e2fs.e2fs_first_dblock = (fs->e2fs.e2fs_log_bsize == 0) ? 1 : 0; 485 fs->e2fs.e2fs_bpg = fs->e2fs_bsize * NBBY; 486 fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize; 487 fs->e2fs_qbmask = fs->e2fs_bsize - 1; 488 fs->e2fs_bmask = ~fs->e2fs_qbmask; 489 fs->e2fs_ncg = 490 howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock, 491 fs->e2fs.e2fs_bpg); 492 fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + 1; 493 fs->e2fs_ngdb = howmany(fs->e2fs_ncg, 494 fs->e2fs_bsize / sizeof(struct ext2_gd)); 495 496 return (1); 497 } 498 499 static struct disklabel * 500 getdisklabel(char *s, int fd) 501 { 502 static struct disklabel lab; 503 504 if (ioctl(fd, DIOCGDINFO, (char *)&lab) == -1) { 505 if (s == NULL) 506 return (NULL); 507 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 508 errexit("%s: can't read disk label\n", s); 509 } 510 return (&lab); 511 } 512 513 daddr32_t 514 cgoverhead(int c) 515 { 516 int overh; 517 overh = 1 /* block bitmap */ + 518 1 /* inode bitmap */ + 519 sblock.e2fs_itpg; 520 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 521 sblock.e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSE_SUPER) { 522 if (cg_has_sb(c) == 0) 523 return overh; 524 } 525 overh += 1 + sblock.e2fs_ngdb; 526 return overh; 527 } 528