scan_ffs.c revision 1.14
1 /* $NetBSD: scan_ffs.c,v 1.14 2006/10/14 13:22:34 xtraeme Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Juan Romero Pardines. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Juan Romero Pardines 21 * for the NetBSD Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1998 Niklas Hallqvist, Tobias Weingartner 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 */ 63 64 /* 65 * Currently it can detect FFS and LFS partitions (version 1 or 2) 66 * up to 8192/65536 fragsize/blocksize. 67 */ 68 69 #include <sys/cdefs.h> 70 #ifndef lint 71 __RCSID("$NetBSD: scan_ffs.c,v 1.14 2006/10/14 13:22:34 xtraeme Exp $"); 72 #endif /* not lint */ 73 74 #include <sys/types.h> 75 #include <sys/param.h> 76 #include <sys/disklabel.h> 77 #include <sys/dkio.h> 78 #include <sys/ioctl.h> 79 #include <sys/fcntl.h> 80 #include <sys/queue.h> 81 #include <sys/mount.h> 82 83 #include <ufs/ufs/dinode.h> 84 #include <ufs/lfs/lfs.h> 85 86 /* Undefine macros defined by both lfs/lfs.h and ffs/fs.h */ 87 #undef fsbtodb 88 #undef dbtofsb 89 #undef blkoff 90 #undef fragoff 91 #undef lblktosize 92 #undef lblkno 93 #undef numfrags 94 #undef blkroundup 95 #undef fragroundup 96 #undef fragstoblks 97 #undef blkstofrags 98 #undef fragnum 99 #undef blknum 100 #undef blksize 101 #undef INOPB 102 #undef INOPF 103 #undef NINDIR 104 105 #include <ufs/ffs/fs.h> 106 107 /* Undefine macros defined by both lfs/lfs.h and ffs/fs.h */ 108 /* ...to make sure we don't later depend on their (ambigious) definition */ 109 #undef fsbtodb 110 #undef dbtofsb 111 #undef blkoff 112 #undef fragoff 113 #undef lblktosize 114 #undef lblkno 115 #undef numfrags 116 #undef blkroundup 117 #undef fragroundup 118 #undef fragstoblks 119 #undef blkstofrags 120 #undef fragnum 121 #undef blknum 122 #undef blksize 123 #undef INOPB 124 #undef INOPF 125 #undef NINDIR 126 127 #include <unistd.h> 128 #include <stdlib.h> 129 #include <stdio.h> 130 #include <string.h> 131 #include <err.h> 132 #include <util.h> 133 134 #define BLK_CNT (blk + (n / 512)) 135 136 /* common struct for FFS/LFS */ 137 struct sblockinfo { 138 struct lfs *lfs; 139 struct fs *ffs; 140 uint64_t lfs_off; 141 uint64_t ffs_off; 142 char lfs_path[MAXMNTLEN]; 143 char ffs_path[MAXMNTLEN]; 144 }; 145 146 static daddr_t blk, lastblk; 147 148 static int eflag = 0; 149 static int fflag = 0; 150 static int flags = 0; 151 static int sbaddr = 0; /* counter for the LFS superblocks */ 152 153 static char device[MAXPATHLEN]; 154 static const char *fstypes[] = { "NONE", "FFSv1", "FFSv2", "LFS" }; 155 156 #define FSTYPE_NONE 0 157 #define FSTYPE_FFSV1 1 158 #define FSTYPE_FFSV2 2 159 160 #define SBCOUNT 64 /* may be changed */ 161 #define SBPASS (SBCOUNT * SBLOCKSIZE / 512) 162 163 /* This is only useful for LFS */ 164 165 /* first sblock address contains the correct offset */ 166 #define FIRST_SBLOCK_ADDRESS 1 167 /* second and third sblock address contain lfs_fsmnt[MAXMNTLEN] */ 168 #define SECOND_SBLOCK_ADDRESS 2 169 /* last sblock address in a LFS partition */ 170 #define MAX_SBLOCK_ADDRESS 10 171 172 enum { NADA, VERBOSE, LABELS }; 173 174 /* FFS functions */ 175 static void ffs_printpart(struct sblockinfo *, int, size_t, int); 176 static void ffs_scan(struct sblockinfo *, int); 177 static int ffs_checkver(struct sblockinfo *); 178 /* LFS functions */ 179 static void lfs_printpart(struct sblockinfo *, int, int); 180 static void lfs_scan(struct sblockinfo *, int); 181 /* common functions */ 182 static void usage(void) __attribute__((__noreturn__)); 183 static int scan_disk(int, daddr_t, daddr_t, int); 184 185 static int 186 ffs_checkver(struct sblockinfo *sbi) 187 { 188 switch (sbi->ffs->fs_magic) { 189 case FS_UFS1_MAGIC: 190 case FS_UFS1_MAGIC_SWAPPED: 191 sbi->ffs->fs_size = sbi->ffs->fs_old_size; 192 return FSTYPE_FFSV1; 193 case FS_UFS2_MAGIC: 194 case FS_UFS2_MAGIC_SWAPPED: 195 return FSTYPE_FFSV2; 196 default: 197 return FSTYPE_NONE; 198 } 199 } 200 201 static void 202 ffs_printpart(struct sblockinfo *sbi, int flag, size_t ffsize, int n) 203 { 204 205 int fstype = ffs_checkver(sbi); 206 207 switch (flag) { 208 case VERBOSE: 209 switch (fstype) { 210 case FSTYPE_FFSV1: 211 (void)printf("offset: %" PRIu64 " n: %d " 212 "id %x,%x size: %" PRIu64 "\n", 213 BLK_CNT - (2 * SBLOCKSIZE / 512), n, 214 sbi->ffs->fs_id[0], sbi->ffs->fs_id[1], 215 (uint64_t)(off_t)sbi->ffs->fs_size * 216 sbi->ffs->fs_fsize / 512); 217 break; 218 case FSTYPE_FFSV2: 219 (void)printf("offset: %" PRIu64 " n: %d " 220 "id %x,%x size: %" PRIu64 "\n", 221 BLK_CNT - (ffsize * SBLOCKSIZE / 512+128), 222 n, sbi->ffs->fs_id[0], sbi->ffs->fs_id[1], 223 (uint64_t)(off_t)sbi->ffs->fs_size * 224 sbi->ffs->fs_fsize / 512); 225 break; 226 default: 227 break; 228 } 229 break; 230 case LABELS: 231 (void)printf("X: %9" PRIu64, 232 (uint64_t)((off_t)sbi->ffs->fs_size * 233 sbi->ffs->fs_fsize / 512)); 234 switch (fstype) { 235 case FSTYPE_FFSV1: 236 (void)printf(" %9" PRIu64, 237 BLK_CNT - (ffsize * SBLOCKSIZE / 512)); 238 break; 239 case FSTYPE_FFSV2: 240 (void)printf(" %9" PRIu64, 241 BLK_CNT - (ffsize * SBLOCKSIZE / 512 + 128)); 242 break; 243 default: 244 break; 245 } 246 (void)printf(" 4.2BSD %6d %5d %7d # %s [%s]\n", 247 sbi->ffs->fs_fsize, sbi->ffs->fs_bsize, 248 sbi->ffs->fs_old_cpg, 249 sbi->ffs_path, fstypes[fstype]); 250 break; 251 default: 252 (void)printf("%s ", fstypes[fstype]); 253 switch (fstype) { 254 case FSTYPE_FFSV1: 255 (void)printf("at %" PRIu64, 256 BLK_CNT - (2 * SBLOCKSIZE / 512)); 257 break; 258 case FSTYPE_FFSV2: 259 (void)printf("at %" PRIu64, 260 BLK_CNT - (ffsize * SBLOCKSIZE / 512 + 128)); 261 break; 262 default: 263 break; 264 } 265 (void)printf(" size %" PRIu64 ", last mounted on %s\n", 266 (uint64_t)((off_t)sbi->ffs->fs_size * 267 sbi->ffs->fs_fsize / 512), sbi->ffs_path); 268 break; 269 } 270 } 271 272 static void 273 ffs_scan(struct sblockinfo *sbi, int n) 274 { 275 int fstype = ffs_checkver(sbi); 276 size_t i = 0; 277 278 if (flags & VERBOSE) 279 ffs_printpart(sbi, VERBOSE, NADA, n); 280 switch (fstype) { 281 case FSTYPE_FFSV1: 282 /* fsize/bsize > 512/4096 and < 4096/32768. */ 283 if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 512)) { 284 i = 2; 285 /* fsize/bsize 4096/32768. */ 286 } else if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 170)) { 287 i = 4; 288 /* fsize/bsize 8192/65536 */ 289 } else if ((BLK_CNT - lastblk) == (SBLOCKSIZE / 73)) { 290 i = 8; 291 } else 292 break; 293 294 if (flags & LABELS) 295 ffs_printpart(sbi, LABELS, i, n); 296 else 297 ffs_printpart(sbi, NADA, i, n); 298 299 break; 300 case FSTYPE_FFSV2: 301 /* 302 * That checks for FFSv2 partitions with fragsize/blocksize: 303 * 512/4096, 1024/8192, 2048/16384, 4096/32768 and 8192/65536. 304 * Really enough for now. 305 */ 306 for (i = 1; i < 16; i <<= 1) 307 if ((BLK_CNT - lastblk) == (i * SBLOCKSIZE / 512)) { 308 if (flags & LABELS) 309 ffs_printpart(sbi, LABELS, i, n); 310 else 311 ffs_printpart(sbi, NADA, i, n); 312 } 313 break; 314 } 315 } 316 317 static void 318 lfs_printpart(struct sblockinfo *sbi, int flag, int n) 319 { 320 if (flags & VERBOSE) 321 (void)printf("offset: %" PRIu64 " size %" PRIu32 "\n", 322 sbi->lfs_off, sbi->lfs->lfs_size); 323 switch (flag) { 324 case LABELS: 325 (void)printf("X: %9" PRIu64, 326 (uint64_t)((off_t)sbi->lfs->lfs_size * 327 sbi->lfs->lfs_fsize / 512)); 328 (void)printf(" %9" PRIu64, sbi->lfs_off); 329 (void)printf(" 4.4LFS %6d %5d %7d # %s [LFSv%d]\n", 330 sbi->lfs->lfs_fsize, sbi->lfs->lfs_bsize, 331 sbi->lfs->lfs_nseg, sbi->lfs_path, 332 sbi->lfs->lfs_version); 333 break; 334 default: 335 (void)printf("LFSv%d ", sbi->lfs->lfs_version); 336 (void)printf("at %" PRIu64, sbi->lfs_off); 337 (void)printf(" size %" PRIu64 ", last mounted on %s\n", 338 (uint64_t)((off_t)sbi->lfs->lfs_size * 339 sbi->lfs->lfs_fsize / 512), sbi->lfs_path); 340 break; 341 } 342 } 343 344 static void 345 lfs_scan(struct sblockinfo *sbi, int n) 346 { 347 /* backup offset */ 348 lastblk = BLK_CNT - (LFS_SBPAD / 512); 349 /* increment counter */ 350 ++sbaddr; 351 352 switch (sbaddr) { 353 /* 354 * first superblock contains the right offset, but lfs_fsmnt is 355 * empty... afortunately the next superblock address has it. 356 */ 357 case FIRST_SBLOCK_ADDRESS: 358 /* copy partition offset */ 359 if (sbi->lfs_off != lastblk) 360 sbi->lfs_off = BLK_CNT - (LFS_SBPAD / 512); 361 break; 362 case SECOND_SBLOCK_ADDRESS: 363 /* copy the path of last mount */ 364 (void)memcpy(sbi->lfs_path, sbi->lfs->lfs_fsmnt, MAXMNTLEN); 365 /* print now that we have the info */ 366 if (flags & LABELS) 367 lfs_printpart(sbi, LABELS, n); 368 else 369 lfs_printpart(sbi, NADA, n); 370 /* clear our struct */ 371 (void)memset(sbi, 0, sizeof(*sbi)); 372 break; 373 case MAX_SBLOCK_ADDRESS: 374 /* 375 * reset the counter, this is the last superblock address, 376 * the next one will be another partition maybe. 377 */ 378 sbaddr = 0; 379 break; 380 default: 381 break; 382 } 383 } 384 385 static int 386 scan_disk(int fd, daddr_t beg, daddr_t end, int fflags) 387 { 388 struct sblockinfo sbinfo; 389 uint8_t buf[SBLOCKSIZE * SBCOUNT]; 390 int n, fstype; 391 392 n = fstype = 0; 393 lastblk = -1; 394 395 /* clear our struct before using it */ 396 (void)memset(&sbinfo, 0, sizeof(sbinfo)); 397 398 if (fflags & LABELS) 399 (void)printf( 400 "# size offset fstype [fsize bsize cpg/sgs]\n"); 401 402 for (blk = beg; blk <= ((end < 0) ? blk: end); blk += SBPASS) { 403 (void)memset(&buf, 0, sizeof(buf)); 404 405 if (pread(fd, buf, sizeof(buf), (off_t)blk * 512) == (off_t)-1) 406 err(1, "pread"); 407 408 for (n = 0; n < (SBLOCKSIZE * SBCOUNT); n += 512) { 409 sbinfo.ffs = (struct fs *)(void *)&buf[n]; 410 sbinfo.lfs = (struct lfs *)(void *)&buf[n]; 411 fstype = ffs_checkver(&sbinfo); 412 switch (fstype) { 413 case FSTYPE_FFSV1: 414 case FSTYPE_FFSV2: 415 ffs_scan(&sbinfo, n); 416 lastblk = BLK_CNT; 417 (void)memcpy(sbinfo.ffs_path, 418 sbinfo.ffs->fs_fsmnt, MAXMNTLEN); 419 break; 420 case FSTYPE_NONE: 421 /* maybe LFS? */ 422 if (sbinfo.lfs->lfs_magic == LFS_MAGIC) 423 lfs_scan(&sbinfo, n); 424 break; 425 default: 426 break; 427 } 428 } 429 } 430 return EXIT_SUCCESS; 431 } 432 433 434 static void 435 usage(void) 436 { 437 (void)fprintf(stderr, 438 "Usage: %s [-lv] [-e end] [-F file] [-s start] " 439 "device\n", getprogname()); 440 exit(EXIT_FAILURE); 441 } 442 443 444 int 445 main(int argc, char **argv) 446 { 447 int ch, fd; 448 const char *fpath; 449 daddr_t end = -1, beg = 0; 450 struct disklabel dl; 451 452 fpath = NULL; 453 454 setprogname(*argv); 455 while ((ch = getopt(argc, argv, "e:F:ls:v")) != -1) 456 switch(ch) { 457 case 'e': 458 eflag = 1; 459 end = atoi(optarg); 460 break; 461 case 'F': 462 fflag = 1; 463 fpath = optarg; 464 break; 465 case 'l': 466 flags |= LABELS; 467 break; 468 case 's': 469 beg = atoi(optarg); 470 break; 471 case 'v': 472 flags |= VERBOSE; 473 break; 474 default: 475 usage(); 476 /* NOTREACHED */ 477 } 478 479 argc -= optind; 480 argv += optind; 481 482 if (fflag) { 483 struct stat stp; 484 485 if (stat(fpath, &stp)) 486 err(1, "Cannot stat `%s'", fpath); 487 488 if (!eflag) 489 end = (uint64_t)stp.st_size; 490 491 fd = open(fpath, O_RDONLY); 492 } else { 493 if (argc != 1) 494 usage(); 495 496 fd = opendisk(argv[0], O_RDONLY, device, sizeof(device), 0); 497 498 if (ioctl(fd, DIOCGDINFO, &dl) == -1) { 499 warn("Couldn't retrieve disklabel"); 500 (void)memset(&dl, 0, sizeof(dl)); 501 dl.d_secperunit = 0x7fffffff; 502 } else { 503 (void)printf("Disk: %s\n", dl.d_typename); 504 (void)printf("Total sectors on disk: %" PRIu32 "\n\n", 505 dl.d_secperunit); 506 } 507 } 508 509 if (!eflag && !fflag) 510 end = dl.d_secperunit; /* default to max sectors */ 511 512 if (fd == -1) 513 err(1, "Cannot open `%s'", device); 514 /* NOTREACHED */ 515 516 return scan_disk(fd, beg, end, flags); 517 } 518
Indexes created Wed Oct 01 12:09:54 GMT 2025