setup.c revision 1.28.8.2
1 /* $NetBSD: setup.c,v 1.28.8.2 2013/06/23 06:28:51 tls Exp $ */ 2 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 /* 33 * Copyright (c) 1997 Manuel Bouyer. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 47 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 48 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 49 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 53 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 */ 55 56 #include <sys/cdefs.h> 57 #ifndef lint 58 #if 0 59 static char sccsid[] = "@(#)setup.c 8.5 (Berkeley) 11/23/94"; 60 #else 61 __RCSID("$NetBSD: setup.c,v 1.28.8.2 2013/06/23 06:28:51 tls Exp $"); 62 #endif 63 #endif /* not lint */ 64 65 #define FSTYPENAMES 66 #include <sys/param.h> 67 #include <sys/time.h> 68 #include <ufs/ext2fs/ext2fs_dinode.h> 69 #include <ufs/ext2fs/ext2fs.h> 70 #include <sys/stat.h> 71 #include <sys/ioctl.h> 72 #include <sys/disklabel.h> 73 #include <sys/file.h> 74 75 #include <errno.h> 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 #include <ctype.h> 80 81 #include "fsck.h" 82 #include "extern.h" 83 #include "fsutil.h" 84 #include "exitvalues.h" 85 86 void badsb(int, const char *); 87 int calcsb(const char *, int, struct m_ext2fs *); 88 static struct disklabel *getdisklabel(const char *, int); 89 static int readsb(int); 90 91 int 92 setup(const char *dev) 93 { 94 long cg, asked, i; 95 long bmapsize; 96 struct disklabel *lp; 97 off_t sizepb; 98 struct stat statb; 99 struct m_ext2fs proto; 100 int doskipclean; 101 u_int64_t maxfilesize; 102 103 havesb = 0; 104 fswritefd = -1; 105 doskipclean = skipclean; 106 if (stat(dev, &statb) < 0) { 107 printf("Can't stat %s: %s\n", dev, strerror(errno)); 108 return 0; 109 } 110 if (!S_ISCHR(statb.st_mode)) { 111 pfatal("%s is not a character device", dev); 112 if (reply("CONTINUE") == 0) 113 return 0; 114 } 115 if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 116 printf("Can't open %s: %s\n", dev, strerror(errno)); 117 return 0; 118 } 119 if (preen == 0) 120 printf("** %s", dev); 121 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 122 fswritefd = -1; 123 if (preen) 124 pfatal("NO WRITE ACCESS"); 125 printf(" (NO WRITE)"); 126 } 127 if (preen == 0) 128 printf("\n"); 129 fsmodified = 0; 130 lfdir = 0; 131 initbarea(&sblk); 132 initbarea(&asblk); 133 sblk.b_un.b_buf = malloc(SBSIZE); 134 asblk.b_un.b_buf = malloc(SBSIZE); 135 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 136 errexit("cannot allocate space for superblock"); 137 if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) 138 dev_bsize = secsize = lp->d_secsize; 139 else 140 dev_bsize = secsize = DEV_BSIZE; 141 /* 142 * Read in the superblock, looking for alternates if necessary 143 */ 144 if (readsb(1) == 0) { 145 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 146 return 0; 147 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 148 return 0; 149 for (cg = 1; cg < proto.e2fs_ncg; cg++) { 150 bflag = fsbtodb(&proto, 151 cg * proto.e2fs.e2fs_bpg + 152 proto.e2fs.e2fs_first_dblock); 153 if (readsb(0) != 0) 154 break; 155 } 156 if (cg >= proto.e2fs_ncg) { 157 printf("%s %s\n%s %s\n%s %s\n", 158 "SEARCH FOR ALTERNATE SUPER-BLOCK", 159 "FAILED. YOU MUST USE THE", 160 "-b OPTION TO FSCK_FFS TO SPECIFY THE", 161 "LOCATION OF AN ALTERNATE", 162 "SUPER-BLOCK TO SUPPLY NEEDED", 163 "INFORMATION; SEE fsck_ext2fs(8)."); 164 return 0; 165 } 166 doskipclean = 0; 167 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 168 } 169 if (debug) 170 printf("state = %d\n", sblock.e2fs.e2fs_state); 171 if (sblock.e2fs.e2fs_state == E2FS_ISCLEAN) { 172 if (doskipclean) { 173 pwarn("%sile system is clean; not checking\n", 174 preen ? "f" : "** F"); 175 return -1; 176 } 177 if (!preen) 178 pwarn("** File system is already clean\n"); 179 } 180 maxfsblock = sblock.e2fs.e2fs_bcount; 181 maxino = sblock.e2fs_ncg * sblock.e2fs.e2fs_ipg; 182 sizepb = sblock.e2fs_bsize; 183 maxfilesize = sblock.e2fs_bsize * EXT2FS_NDADDR - 1; 184 for (i = 0; i < EXT2FS_NIADDR; i++) { 185 sizepb *= EXT2_NINDIR(&sblock); 186 maxfilesize += sizepb; 187 } 188 /* 189 * Check and potentially fix certain fields in the super block. 190 */ 191 if (/* (sblock.e2fs.e2fs_rbcount < 0) || */ 192 (sblock.e2fs.e2fs_rbcount > sblock.e2fs.e2fs_bcount)) { 193 pfatal("IMPOSSIBLE RESERVED BLOCK COUNT=%d IN SUPERBLOCK", 194 sblock.e2fs.e2fs_rbcount); 195 if (reply("SET TO DEFAULT") == 1) { 196 sblock.e2fs.e2fs_rbcount = 197 sblock.e2fs.e2fs_bcount * MINFREE / 100; 198 sbdirty(); 199 dirty(&asblk); 200 } 201 } 202 if (sblock.e2fs.e2fs_bpg != sblock.e2fs.e2fs_fpg) { 203 pfatal("WRONG FPG=%d (BPG=%d) IN SUPERBLOCK", 204 sblock.e2fs.e2fs_fpg, sblock.e2fs.e2fs_bpg); 205 return 0; 206 } 207 if (asblk.b_dirty && !bflag) { 208 copyback_sb(&asblk); 209 flush(fswritefd, &asblk); 210 } 211 /* 212 * read in the summary info. 213 */ 214 215 sblock.e2fs_gd = malloc(sblock.e2fs_ngdb * sblock.e2fs_bsize); 216 if (sblock.e2fs_gd == NULL) 217 errexit("out of memory"); 218 asked = 0; 219 for (i = 0; i < sblock.e2fs_ngdb; i++) { 220 if (bread(fsreadfd, 221 (char *)&sblock.e2fs_gd[i * sblock.e2fs_bsize / 222 sizeof(struct ext2_gd)], 223 fsbtodb(&sblock, ((sblock.e2fs_bsize > 1024) ? 0 : 1) + 224 i + 1), 225 sblock.e2fs_bsize) != 0 && !asked) { 226 pfatal("BAD SUMMARY INFORMATION"); 227 if (reply("CONTINUE") == 0) 228 exit(FSCK_EXIT_CHECK_FAILED); 229 asked++; 230 } 231 } 232 /* 233 * allocate and initialize the necessary maps 234 */ 235 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); 236 blockmap = calloc((unsigned int)bmapsize, sizeof(char)); 237 if (blockmap == NULL) { 238 printf("cannot alloc %u bytes for blockmap\n", 239 (unsigned int)bmapsize); 240 goto badsblabel; 241 } 242 statemap = calloc((unsigned int)(maxino + 2), sizeof(char)); 243 if (statemap == NULL) { 244 printf("cannot alloc %u bytes for statemap\n", 245 (unsigned int)(maxino + 1)); 246 goto badsblabel; 247 } 248 typemap = calloc((unsigned int)(maxino + 1), sizeof(char)); 249 if (typemap == NULL) { 250 printf("cannot alloc %u bytes for typemap\n", 251 (unsigned int)(maxino + 1)); 252 goto badsblabel; 253 } 254 lncntp = calloc((unsigned)(maxino + 1), sizeof(int16_t)); 255 if (lncntp == NULL) { 256 printf("cannot alloc %u bytes for lncntp\n", 257 (unsigned int)((maxino + 1) * sizeof(int16_t))); 258 goto badsblabel; 259 } 260 for (numdirs = 0, cg = 0; cg < sblock.e2fs_ncg; cg++) { 261 numdirs += fs2h16(sblock.e2fs_gd[cg].ext2bgd_ndirs); 262 } 263 inplast = 0; 264 listmax = numdirs + 10; 265 inpsort = calloc((unsigned int)listmax, sizeof(struct inoinfo *)); 266 inphead = calloc((unsigned int)numdirs, sizeof(struct inoinfo *)); 267 if (inpsort == NULL || inphead == NULL) { 268 printf("cannot alloc %u bytes for inphead\n", 269 (unsigned int)(numdirs * sizeof(struct inoinfo *))); 270 goto badsblabel; 271 } 272 bufinit(); 273 return 1; 274 275 badsblabel: 276 ckfini(0); 277 return 0; 278 } 279 280 /* 281 * Read in the super block and its summary info, convert to host byte order. 282 */ 283 static int 284 readsb(int listerr) 285 { 286 daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 287 288 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) 289 return 0; 290 sblk.b_bno = super; 291 sblk.b_size = SBSIZE; 292 293 /* Copy the superblock in memory */ 294 e2fs_sbload(sblk.b_un.b_fs, &sblock.e2fs); 295 296 /* 297 * run a few consistency checks of the super block 298 */ 299 if (sblock.e2fs.e2fs_magic != E2FS_MAGIC) { 300 badsb(listerr, "MAGIC NUMBER WRONG"); 301 return 0; 302 } 303 if (sblock.e2fs.e2fs_log_bsize > 2) { 304 badsb(listerr, "BAD LOG_BSIZE"); 305 return 0; 306 } 307 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 308 (!powerof2(sblock.e2fs.e2fs_inode_size) || 309 sblock.e2fs.e2fs_inode_size < sizeof(struct ext2fs_dinode) || 310 sblock.e2fs.e2fs_inode_size > 311 (1024 << sblock.e2fs.e2fs_log_bsize))) { 312 badsb(listerr, "BAD INODE_SIZE"); 313 return 0; 314 } 315 316 /* compute the dynamic fields of the in-memory sb */ 317 /* compute dynamic sb infos */ 318 sblock.e2fs_ncg = 319 howmany(sblock.e2fs.e2fs_bcount - sblock.e2fs.e2fs_first_dblock, 320 sblock.e2fs.e2fs_bpg); 321 /* XXX assume hw bsize = 512 */ 322 sblock.e2fs_fsbtodb = sblock.e2fs.e2fs_log_bsize + 1; 323 sblock.e2fs_bsize = 1024 << sblock.e2fs.e2fs_log_bsize; 324 sblock.e2fs_bshift = LOG_MINBSIZE + sblock.e2fs.e2fs_log_bsize; 325 sblock.e2fs_qbmask = sblock.e2fs_bsize - 1; 326 sblock.e2fs_bmask = ~sblock.e2fs_qbmask; 327 sblock.e2fs_ngdb = howmany(sblock.e2fs_ncg, 328 sblock.e2fs_bsize / sizeof(struct ext2_gd)); 329 sblock.e2fs_ipb = sblock.e2fs_bsize / EXT2_DINODE_SIZE(&sblock); 330 sblock.e2fs_itpg = howmany(sblock.e2fs.e2fs_ipg, sblock.e2fs_ipb); 331 332 /* 333 * Compute block size that the filesystem is based on, 334 * according to fsbtodb, and adjust superblock block number 335 * so we can tell if this is an alternate later. 336 */ 337 super *= dev_bsize; 338 dev_bsize = sblock.e2fs_bsize / fsbtodb(&sblock, 1); 339 sblk.b_bno = super / dev_bsize; 340 341 if (sblock.e2fs_ncg == 1) { 342 /* no alternate superblock; assume it's okay */ 343 havesb = 1; 344 return 1; 345 } 346 getblk(&asblk, 1 * sblock.e2fs.e2fs_bpg + sblock.e2fs.e2fs_first_dblock, 347 (long)SBSIZE); 348 if (asblk.b_errs) 349 return 0; 350 if (bflag) { 351 havesb = 1; 352 return 1; 353 } 354 355 /* 356 * Set all possible fields that could differ, then do check 357 * of whole super block against an alternate super block. 358 * When an alternate super-block is specified this check is skipped. 359 */ 360 asblk.b_un.b_fs->e2fs_rbcount = sblk.b_un.b_fs->e2fs_rbcount; 361 asblk.b_un.b_fs->e2fs_fbcount = sblk.b_un.b_fs->e2fs_fbcount; 362 asblk.b_un.b_fs->e2fs_ficount = sblk.b_un.b_fs->e2fs_ficount; 363 asblk.b_un.b_fs->e2fs_mtime = sblk.b_un.b_fs->e2fs_mtime; 364 asblk.b_un.b_fs->e2fs_wtime = sblk.b_un.b_fs->e2fs_wtime; 365 asblk.b_un.b_fs->e2fs_mnt_count = sblk.b_un.b_fs->e2fs_mnt_count; 366 asblk.b_un.b_fs->e2fs_max_mnt_count = 367 sblk.b_un.b_fs->e2fs_max_mnt_count; 368 asblk.b_un.b_fs->e2fs_state = sblk.b_un.b_fs->e2fs_state; 369 asblk.b_un.b_fs->e2fs_beh = sblk.b_un.b_fs->e2fs_beh; 370 asblk.b_un.b_fs->e2fs_lastfsck = sblk.b_un.b_fs->e2fs_lastfsck; 371 asblk.b_un.b_fs->e2fs_fsckintv = sblk.b_un.b_fs->e2fs_fsckintv; 372 asblk.b_un.b_fs->e2fs_ruid = sblk.b_un.b_fs->e2fs_ruid; 373 asblk.b_un.b_fs->e2fs_rgid = sblk.b_un.b_fs->e2fs_rgid; 374 asblk.b_un.b_fs->e2fs_block_group_nr = 375 sblk.b_un.b_fs->e2fs_block_group_nr; 376 asblk.b_un.b_fs->e2fs_features_rocompat &= ~EXT2F_ROCOMPAT_LARGEFILE; 377 asblk.b_un.b_fs->e2fs_features_rocompat |= 378 sblk.b_un.b_fs->e2fs_features_rocompat & EXT2F_ROCOMPAT_LARGEFILE; 379 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 380 ((sblock.e2fs.e2fs_features_incompat & ~EXT2F_INCOMPAT_SUPP) || 381 (sblock.e2fs.e2fs_features_rocompat & ~EXT2F_ROCOMPAT_SUPP))) { 382 if (debug) { 383 printf("compat 0x%08x, incompat 0x%08x, compat_ro " 384 "0x%08x\n", 385 sblock.e2fs.e2fs_features_compat, 386 sblock.e2fs.e2fs_features_incompat, 387 sblock.e2fs.e2fs_features_rocompat); 388 } 389 badsb(listerr, "INCOMPATIBLE FEATURE BITS IN SUPER BLOCK"); 390 return 0; 391 } 392 if (memcmp(sblk.b_un.b_fs, asblk.b_un.b_fs, SBSIZE)) { 393 if (debug) { 394 u_int32_t *nlp, *olp, *endlp; 395 396 printf("superblock mismatches\n"); 397 nlp = (u_int32_t *)asblk.b_un.b_fs; 398 olp = (u_int32_t *)sblk.b_un.b_fs; 399 endlp = olp + (SBSIZE / sizeof(*olp)); 400 for ( ; olp < endlp; olp++, nlp++) { 401 if (*olp == *nlp) 402 continue; 403 printf("offset %ld, original %ld, " 404 "alternate %ld\n", 405 (long)(olp - (u_int32_t *)sblk.b_un.b_fs), 406 (long)fs2h32(*olp), 407 (long)fs2h32(*nlp)); 408 } 409 } 410 badsb(listerr, 411 "VALUES IN SUPER BLOCK DISAGREE WITH " 412 "THOSE IN FIRST ALTERNATE"); 413 return 0; 414 } 415 havesb = 1; 416 return 1; 417 } 418 419 void 420 copyback_sb(struct bufarea *bp) 421 { 422 /* Copy the in-memory superblock back to buffer */ 423 bp->b_un.b_fs->e2fs_icount = h2fs32(sblock.e2fs.e2fs_icount); 424 bp->b_un.b_fs->e2fs_bcount = h2fs32(sblock.e2fs.e2fs_bcount); 425 bp->b_un.b_fs->e2fs_rbcount = h2fs32(sblock.e2fs.e2fs_rbcount); 426 bp->b_un.b_fs->e2fs_fbcount = h2fs32(sblock.e2fs.e2fs_fbcount); 427 bp->b_un.b_fs->e2fs_ficount = h2fs32(sblock.e2fs.e2fs_ficount); 428 bp->b_un.b_fs->e2fs_first_dblock = 429 h2fs32(sblock.e2fs.e2fs_first_dblock); 430 bp->b_un.b_fs->e2fs_log_bsize = h2fs32(sblock.e2fs.e2fs_log_bsize); 431 bp->b_un.b_fs->e2fs_fsize = h2fs32(sblock.e2fs.e2fs_fsize); 432 bp->b_un.b_fs->e2fs_bpg = h2fs32(sblock.e2fs.e2fs_bpg); 433 bp->b_un.b_fs->e2fs_fpg = h2fs32(sblock.e2fs.e2fs_fpg); 434 bp->b_un.b_fs->e2fs_ipg = h2fs32(sblock.e2fs.e2fs_ipg); 435 bp->b_un.b_fs->e2fs_mtime = h2fs32(sblock.e2fs.e2fs_mtime); 436 bp->b_un.b_fs->e2fs_wtime = h2fs32(sblock.e2fs.e2fs_wtime); 437 bp->b_un.b_fs->e2fs_lastfsck = h2fs32(sblock.e2fs.e2fs_lastfsck); 438 bp->b_un.b_fs->e2fs_fsckintv = h2fs32(sblock.e2fs.e2fs_fsckintv); 439 bp->b_un.b_fs->e2fs_creator = h2fs32(sblock.e2fs.e2fs_creator); 440 bp->b_un.b_fs->e2fs_rev = h2fs32(sblock.e2fs.e2fs_rev); 441 bp->b_un.b_fs->e2fs_mnt_count = h2fs16(sblock.e2fs.e2fs_mnt_count); 442 bp->b_un.b_fs->e2fs_max_mnt_count = 443 h2fs16(sblock.e2fs.e2fs_max_mnt_count); 444 bp->b_un.b_fs->e2fs_magic = h2fs16(sblock.e2fs.e2fs_magic); 445 bp->b_un.b_fs->e2fs_state = h2fs16(sblock.e2fs.e2fs_state); 446 bp->b_un.b_fs->e2fs_beh = h2fs16(sblock.e2fs.e2fs_beh); 447 bp->b_un.b_fs->e2fs_ruid = h2fs16(sblock.e2fs.e2fs_ruid); 448 bp->b_un.b_fs->e2fs_rgid = h2fs16(sblock.e2fs.e2fs_rgid); 449 } 450 451 void 452 badsb(int listerr, const char *s) 453 { 454 455 if (!listerr) 456 return; 457 if (preen) 458 printf("%s: ", cdevname()); 459 pfatal("BAD SUPER BLOCK: %s\n", s); 460 } 461 462 /* 463 * Calculate a prototype superblock based on information in the disk label. 464 * When done the cgsblock macro can be calculated and the fs_ncg field 465 * can be used. Do NOT attempt to use other macros without verifying that 466 * their needed information is available! 467 */ 468 469 int 470 calcsb(const char *dev, int devfd, struct m_ext2fs *fs) 471 { 472 struct disklabel *lp; 473 struct partition *pp; 474 char *cp; 475 476 cp = strchr(dev, '\0'); 477 if (cp-- == dev || 478 ((*cp < 'a' || *cp > 'h') && !isdigit((unsigned char)*cp))) { 479 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 480 return 0; 481 } 482 lp = getdisklabel(dev, devfd); 483 if (isdigit((unsigned char)*cp)) 484 pp = &lp->d_partitions[0]; 485 else 486 pp = &lp->d_partitions[*cp - 'a']; 487 if (pp->p_fstype != FS_EX2FS) { 488 pfatal("%s: NOT LABELED AS A EXT2 FILE SYSTEM (%s)\n", 489 dev, pp->p_fstype < FSMAXTYPES ? 490 fstypenames[pp->p_fstype] : "unknown"); 491 return 0; 492 } 493 memset(fs, 0, sizeof(struct m_ext2fs)); 494 fs->e2fs_bsize = pp->p_fsize; 495 fs->e2fs.e2fs_log_bsize = pp->p_fsize / 1024; 496 fs->e2fs.e2fs_bcount = (pp->p_size * DEV_BSIZE) / fs->e2fs_bsize; 497 fs->e2fs.e2fs_first_dblock = (fs->e2fs.e2fs_log_bsize == 0) ? 1 : 0; 498 fs->e2fs.e2fs_bpg = fs->e2fs_bsize * NBBY; 499 fs->e2fs_bshift = LOG_MINBSIZE + fs->e2fs.e2fs_log_bsize; 500 fs->e2fs_qbmask = fs->e2fs_bsize - 1; 501 fs->e2fs_bmask = ~fs->e2fs_qbmask; 502 fs->e2fs_ncg = 503 howmany(fs->e2fs.e2fs_bcount - fs->e2fs.e2fs_first_dblock, 504 fs->e2fs.e2fs_bpg); 505 fs->e2fs_fsbtodb = fs->e2fs.e2fs_log_bsize + 1; 506 fs->e2fs_ngdb = howmany(fs->e2fs_ncg, 507 fs->e2fs_bsize / sizeof(struct ext2_gd)); 508 509 return 1; 510 } 511 512 static struct disklabel * 513 getdisklabel(const char *s, int fd) 514 { 515 static struct disklabel lab; 516 517 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 518 if (s == NULL) 519 return NULL; 520 pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 521 errexit("%s: can't read disk label", s); 522 } 523 return &lab; 524 } 525 526 daddr_t 527 cgoverhead(int c) 528 { 529 int overh; 530 overh = 531 1 /* block bitmap */ + 532 1 /* inode bitmap */ + 533 sblock.e2fs_itpg; 534 if (sblock.e2fs.e2fs_rev > E2FS_REV0 && 535 sblock.e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) { 536 if (cg_has_sb(c) == 0) 537 return overh; 538 } 539 overh += 1 /* superblock */ + sblock.e2fs_ngdb; 540 return overh; 541 } 542
Indexes created Sun Oct 19 19:09:49 GMT 2025