Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 | /* vi: set sw=4 ts=4: */ /* * mke2fs.c - Make a ext2fs filesystem. * * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, * 2003, 2004, 2005 by Theodore Ts'o. * * This file may be redistributed under the terms of the GNU Public * License. */ /* Usage: mke2fs [options] device * * The device may be a block device or a image of one, but this isn't * enforced (but it's not much fun on a character device :-). */ #include <stdio.h> #include <string.h> #include <fcntl.h> #include <ctype.h> #include <time.h> #include <getopt.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> #include <mntent.h> #include <sys/ioctl.h> #include <sys/types.h> #include "e2fsbb.h" #include "ext2fs/ext2_fs.h" #include "uuid/uuid.h" #include "e2p/e2p.h" #include "ext2fs/ext2fs.h" #include "util.h" #define STRIDE_LENGTH 8 #ifndef __sparc__ #define ZAP_BOOTBLOCK #endif static const char * device_name; /* Command line options */ static int cflag; static int quiet; static int super_only; static int force; static int noaction; static int journal_size; static int journal_flags; static const char *bad_blocks_filename; static __u32 fs_stride; static struct ext2_super_block param; static char *creator_os; static char *volume_label; static char *mount_dir; static char *journal_device = NULL; static int sync_kludge; /* Set using the MKE2FS_SYNC env. option */ static int sys_page_size = 4096; static int linux_version_code = 0; static int int_log2(int arg) { int l = 0; arg >>= 1; while (arg) { l++; arg >>= 1; } return l; } static int int_log10(unsigned int arg) { int l; for (l = 0; arg; l++) arg = arg / 10; return l; } /* * This function sets the default parameters for a filesystem * * The type is specified by the user. The size is the maximum size * (in megabytes) for which a set of parameters applies, with a size * of zero meaning that it is the default parameter for the type. * Note that order is important in the table below. */ #define DEF_MAX_BLOCKSIZE -1 static const char default_str[] = "default"; struct mke2fs_defaults { const char *type; int size; int blocksize; int inode_ratio; }; static const struct mke2fs_defaults settings[] = { { default_str, 0, 4096, 8192 }, { default_str, 512, 1024, 4096 }, { default_str, 3, 1024, 8192 }, { "journal", 0, 4096, 8192 }, { "news", 0, 4096, 4096 }, { "largefile", 0, 4096, 1024 * 1024 }, { "largefile4", 0, 4096, 4096 * 1024 }, { 0, 0, 0, 0}, }; static void set_fs_defaults(const char *fs_type, struct ext2_super_block *super, int blocksize, int sector_size, int *inode_ratio) { int megs; int ratio = 0; const struct mke2fs_defaults *p; int use_bsize = 1024; megs = super->s_blocks_count * (EXT2_BLOCK_SIZE(super) / 1024) / 1024; if (inode_ratio) ratio = *inode_ratio; if (!fs_type) fs_type = default_str; for (p = settings; p->type; p++) { if ((strcmp(p->type, fs_type) != 0) && (strcmp(p->type, default_str) != 0)) continue; if ((p->size != 0) && (megs > p->size)) continue; if (ratio == 0) *inode_ratio = p->inode_ratio < blocksize ? blocksize : p->inode_ratio; use_bsize = p->blocksize; } if (blocksize <= 0) { if (use_bsize == DEF_MAX_BLOCKSIZE) { use_bsize = sys_page_size; if ((linux_version_code < (2*65536 + 6*256)) && (use_bsize > 4096)) use_bsize = 4096; } if (sector_size && use_bsize < sector_size) use_bsize = sector_size; if ((blocksize < 0) && (use_bsize < (-blocksize))) use_bsize = -blocksize; blocksize = use_bsize; super->s_blocks_count /= blocksize / 1024; } super->s_log_frag_size = super->s_log_block_size = int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); } /* * Helper function for read_bb_file and test_disk */ static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk) { bb_error_msg("Bad block %u out of range; ignored", blk); } /* * Busybox stuff */ static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); static void mke2fs_error_msg_and_die(int retval, const char *fmt, ...) { va_list ap; if (retval) { va_start(ap, fmt); fprintf(stderr,"\nCould not "); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); exit(EXIT_FAILURE); } } static void mke2fs_verbose(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static void mke2fs_verbose(const char *fmt, ...) { va_list ap; if (!quiet) { va_start(ap, fmt); vfprintf(stdout, fmt, ap); fflush(stdout); va_end(ap); } } static void mke2fs_verbose_done(void) { mke2fs_verbose("done\n"); } static void mke2fs_warning_msg(int retval, char *fmt, ... ) __attribute__ ((format (printf, 2, 3))); static void mke2fs_warning_msg(int retval, char *fmt, ... ) { va_list ap; if (retval) { va_start(ap, fmt); fprintf(stderr,"\nWarning: "); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); } } /* * Reads the bad blocks list from a file */ static void read_bb_file(ext2_filsys fs, badblocks_list *bb_list, const char *bad_blocks_file) { FILE *f; errcode_t retval; f = xfopen(bad_blocks_file, "r"); retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block); fclose (f); mke2fs_error_msg_and_die(retval, "read bad blocks from list"); } /* * Runs the badblocks program to test the disk */ static void test_disk(ext2_filsys fs, badblocks_list *bb_list) { FILE *f; errcode_t retval; char buf[1024]; sprintf(buf, "badblocks -b %d %s%s%s %d", fs->blocksize, quiet ? "" : "-s ", (cflag > 1) ? "-w " : "", fs->device_name, fs->super->s_blocks_count); mke2fs_verbose("Running command: %s\n", buf); f = popen(buf, "r"); if (!f) { bb_perror_msg_and_die("cannot run '%s'", buf); } retval = ext2fs_read_bb_FILE(fs, f, bb_list, invalid_block); pclose(f); mke2fs_error_msg_and_die(retval, "read bad blocks from program"); } static void handle_bad_blocks(ext2_filsys fs, badblocks_list bb_list) { dgrp_t i; blk_t j; unsigned must_be_good; blk_t blk; badblocks_iterate bb_iter; errcode_t retval; blk_t group_block; int group; int group_bad; if (!bb_list) return; /* * The primary superblock and group descriptors *must* be * good; if not, abort. */ must_be_good = fs->super->s_first_data_block + 1 + fs->desc_blocks; for (i = fs->super->s_first_data_block; i <= must_be_good; i++) { if (ext2fs_badblocks_list_test(bb_list, i)) { bb_error_msg_and_die( "Block %d in primary superblock/group descriptor area bad\n" "Blocks %d through %d must be good in order to build a filesystem\n" "Aborting ...", i, fs->super->s_first_data_block, must_be_good); } } /* * See if any of the bad blocks are showing up in the backup * superblocks and/or group descriptors. If so, issue a * warning and adjust the block counts appropriately. */ group_block = fs->super->s_first_data_block + fs->super->s_blocks_per_group; for (i = 1; i < fs->group_desc_count; i++) { group_bad = 0; for (j=0; j < fs->desc_blocks+1; j++) { if (ext2fs_badblocks_list_test(bb_list, group_block + j)) { mke2fs_warning_msg(!group_bad, "the backup superblock/group descriptors at block %d contain\n" "bad blocks\n", group_block); group_bad++; group = ext2fs_group_of_blk(fs, group_block+j); fs->group_desc[group].bg_free_blocks_count++; fs->super->s_free_blocks_count++; } } group_block += fs->super->s_blocks_per_group; } /* * Mark all the bad blocks as used... */ retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter); mke2fs_error_msg_and_die(retval, "mark bad blocks as used"); while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) ext2fs_mark_block_bitmap(fs->block_map, blk); ext2fs_badblocks_list_iterate_end(bb_iter); } /* * These functions implement a generalized progress meter. */ struct progress_struct { char format[20]; char backup[80]; __u32 max; int skip_progress; }; static void progress_init(struct progress_struct *progress, const char *label,__u32 max) { int i; memset(progress, 0, sizeof(struct progress_struct)); if (quiet) return; /* * Figure out how many digits we need */ i = int_log10(max); sprintf(progress->format, "%%%dd/%%%dld", i, i); memset(progress->backup, '\b', sizeof(progress->backup)-1); progress->backup[sizeof(progress->backup)-1] = 0; if ((2*i)+1 < (int) sizeof(progress->backup)) progress->backup[(2*i)+1] = 0; progress->max = max; progress->skip_progress = 0; if (getenv("MKE2FS_SKIP_PROGRESS")) progress->skip_progress++; fputs(label, stdout); fflush(stdout); } static void progress_update(struct progress_struct *progress, __u32 val) { if ((progress->format[0] == 0) || progress->skip_progress) return; printf(progress->format, val, progress->max); fputs(progress->backup, stdout); } static void progress_close(struct progress_struct *progress) { if (progress->format[0] == 0) return; printf("%-28s\n", "done"); } /* * Helper function which zeros out _num_ blocks starting at _blk_. In * case of an error, the details of the error is returned via _ret_blk_ * and _ret_count_ if they are non-NULL pointers. Returns 0 on * success, and an error code on an error. * * As a special case, if the first argument is NULL, then it will * attempt to free the static zeroizing buffer. (This is to keep * programs that check for memory leaks happy.) */ static errcode_t zero_blocks(ext2_filsys fs, blk_t blk, int num, struct progress_struct *progress, blk_t *ret_blk, int *ret_count) { int j, count, next_update, next_update_incr; static char *buf; errcode_t retval; /* If fs is null, clean up the static buffer and return */ if (!fs) { if (buf) { free(buf); buf = 0; } return 0; } /* Allocate the zeroizing buffer if necessary */ if (!buf) { buf = xzalloc(fs->blocksize * STRIDE_LENGTH); } /* OK, do the write loop */ next_update = 0; next_update_incr = num / 100; if (next_update_incr < 1) next_update_incr = 1; for (j=0; j < num; j += STRIDE_LENGTH, blk += STRIDE_LENGTH) { count = num - j; if (count > STRIDE_LENGTH) count = STRIDE_LENGTH; retval = io_channel_write_blk(fs->io, blk, count, buf); if (retval) { if (ret_count) *ret_count = count; if (ret_blk) *ret_blk = blk; return retval; } if (progress && j > next_update) { next_update += num / 100; progress_update(progress, blk); } } return 0; } static void write_inode_tables(ext2_filsys fs) { errcode_t retval; blk_t blk; dgrp_t i; int num; struct progress_struct progress; if (quiet) memset(&progress, 0, sizeof(progress)); else progress_init(&progress, "Writing inode tables: ", fs->group_desc_count); for (i = 0; i < fs->group_desc_count; i++) { progress_update(&progress, i); blk = fs->group_desc[i].bg_inode_table; num = fs->inode_blocks_per_group; retval = zero_blocks(fs, blk, num, 0, &blk, &num); mke2fs_error_msg_and_die(retval, "write %d blocks in inode table starting at %d.", num, blk); if (sync_kludge) { if (sync_kludge == 1) sync(); else if ((i % sync_kludge) == 0) sync(); } } zero_blocks(0, 0, 0, 0, 0, 0); progress_close(&progress); } static void create_root_dir(ext2_filsys fs) { errcode_t retval; struct ext2_inode inode; retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, EXT2_ROOT_INO, 0); mke2fs_error_msg_and_die(retval, "create root dir"); if (geteuid()) { retval = ext2fs_read_inode(fs, EXT2_ROOT_INO, &inode); mke2fs_error_msg_and_die(retval, "read root inode"); inode.i_uid = getuid(); if (inode.i_uid) inode.i_gid = getgid(); retval = ext2fs_write_new_inode(fs, EXT2_ROOT_INO, &inode); mke2fs_error_msg_and_die(retval, "set root inode ownership"); } } static void create_lost_and_found(ext2_filsys fs) { errcode_t retval; ext2_ino_t ino; const char *name = "lost+found"; int i = 1; char *msg = "create"; int lpf_size = 0; fs->umask = 077; retval = ext2fs_mkdir(fs, EXT2_ROOT_INO, 0, name); if (retval) { goto CREATE_LOST_AND_FOUND_ERROR; } retval = ext2fs_lookup(fs, EXT2_ROOT_INO, name, strlen(name), 0, &ino); if (retval) { msg = "lookup"; goto CREATE_LOST_AND_FOUND_ERROR; } for (; i < EXT2_NDIR_BLOCKS; i++) { if ((lpf_size += fs->blocksize) >= 16*1024) break; retval = ext2fs_expand_dir(fs, ino); msg = "expand"; CREATE_LOST_AND_FOUND_ERROR: mke2fs_error_msg_and_die(retval, "%s %s", msg, name); } } static void create_bad_block_inode(ext2_filsys fs, badblocks_list bb_list) { errcode_t retval; ext2fs_mark_inode_bitmap(fs->inode_map, EXT2_BAD_INO); fs->group_desc[0].bg_free_inodes_count--; fs->super->s_free_inodes_count--; retval = ext2fs_update_bb_inode(fs, bb_list); mke2fs_error_msg_and_die(retval, "set bad block inode"); } static void reserve_inodes(ext2_filsys fs) { ext2_ino_t i; int group; for (i = EXT2_ROOT_INO + 1; i < EXT2_FIRST_INODE(fs->super); i++) { ext2fs_mark_inode_bitmap(fs->inode_map, i); group = ext2fs_group_of_ino(fs, i); fs->group_desc[group].bg_free_inodes_count--; fs->super->s_free_inodes_count--; } ext2fs_mark_ib_dirty(fs); } #define BSD_DISKMAGIC (0x82564557UL) /* The disk magic number */ #define BSD_MAGICDISK (0x57455682UL) /* The disk magic number reversed */ #define BSD_LABEL_OFFSET 64 static void zap_sector(ext2_filsys fs, int sect, int nsect) { char *buf; char *fmt = "could not %s %d"; int retval; unsigned int *magic; buf = xmalloc(512*nsect); if (sect == 0) { /* Check for a BSD disklabel, and don't erase it if so */ retval = io_channel_read_blk(fs->io, 0, -512, buf); if (retval) mke2fs_warning_msg(retval, fmt, "read block", 0); else { magic = (unsigned int *) (buf + BSD_LABEL_OFFSET); if ((*magic == BSD_DISKMAGIC) || (*magic == BSD_MAGICDISK)) return; } } memset(buf, 0, 512*nsect); io_channel_set_blksize(fs->io, 512); retval = io_channel_write_blk(fs->io, sect, -512*nsect, buf); io_channel_set_blksize(fs->io, fs->blocksize); free(buf); mke2fs_warning_msg(retval, fmt, "erase sector", sect); } static void create_journal_dev(ext2_filsys fs) { struct progress_struct progress; errcode_t retval; char *buf; char *fmt = "%s journal superblock"; blk_t blk; int count; retval = ext2fs_create_journal_superblock(fs, fs->super->s_blocks_count, 0, &buf); mke2fs_error_msg_and_die(retval, fmt, "init"); if (quiet) memset(&progress, 0, sizeof(progress)); else progress_init(&progress, "Zeroing journal device: ", fs->super->s_blocks_count); retval = zero_blocks(fs, 0, fs->super->s_blocks_count, &progress, &blk, &count); mke2fs_error_msg_and_die(retval, "zero journal device (block %u, count %d)", blk, count); zero_blocks(0, 0, 0, 0, 0, 0); retval = io_channel_write_blk(fs->io, fs->super->s_first_data_block+1, 1, buf); mke2fs_error_msg_and_die(retval, fmt, "write"); progress_close(&progress); } static void show_stats(ext2_filsys fs) { struct ext2_super_block *s = fs->super; char *os; blk_t group_block; dgrp_t i; int need, col_left; mke2fs_warning_msg((param.s_blocks_count != s->s_blocks_count), "%d blocks unused\n", param.s_blocks_count - s->s_blocks_count); os = e2p_os2string(fs->super->s_creator_os); printf( "Filesystem label=%.*s\n" "OS type: %s\n" "Block size=%u (log=%u)\n" "Fragment size=%u (log=%u)\n" "%u inodes, %u blocks\n" "%u blocks (%2.2f%%) reserved for the super user\n" "First data block=%u\n", (int) sizeof(s->s_volume_name), s->s_volume_name, os, fs->blocksize, s->s_log_block_size, fs->fragsize, s->s_log_frag_size, s->s_inodes_count, s->s_blocks_count, s->s_r_blocks_count, 100.0 * s->s_r_blocks_count / s->s_blocks_count, s->s_first_data_block); free(os); if (s->s_reserved_gdt_blocks) { printf("Maximum filesystem blocks=%lu\n", (s->s_reserved_gdt_blocks + fs->desc_blocks) * (fs->blocksize / sizeof(struct ext2_group_desc)) * s->s_blocks_per_group); } printf( "%u block group%s\n" "%u blocks per group, %u fragments per group\n" "%u inodes per group\n", fs->group_desc_count, (fs->group_desc_count > 1) ? "s" : "", s->s_blocks_per_group, s->s_frags_per_group, s->s_inodes_per_group); if (fs->group_desc_count == 1) { bb_putchar('\n'); return; } printf("Superblock backups stored on blocks: "); group_block = s->s_first_data_block; col_left = 0; for (i = 1; i < fs->group_desc_count; i++) { group_block += s->s_blocks_per_group; if (!ext2fs_bg_has_super(fs, i)) continue; if (i != 1) printf(", "); need = int_log10(group_block) + 2; if (need > col_left) { printf("\n\t"); col_left = 72; } col_left -= need; printf("%u", group_block); } puts("\n"); } /* * Set the S_CREATOR_OS field. Return true if OS is known, * otherwise, 0. */ static int set_os(struct ext2_super_block *sb, char *os) { if (isdigit (*os)) { sb->s_creator_os = atoi(os); return 1; } if((sb->s_creator_os = e2p_string2os(os)) >= 0) { return 1; } else if (!strcasecmp("GNU", os)) { sb->s_creator_os = EXT2_OS_HURD; return 1; } return 0; } static void parse_extended_opts(struct ext2_super_block *sb_param, const char *opts) { char *buf, *token, *next, *p, *arg; int r_usage = 0; buf = xstrdup(opts); for (token = buf; token && *token; token = next) { p = strchr(token, ','); next = 0; if (p) { *p = 0; next = p+1; } arg = strchr(token, '='); if (arg) { *arg = 0; arg++; } if (strcmp(token, "stride") == 0) { if (!arg) { r_usage++; continue; } fs_stride = strtoul(arg, &p, 0); if (*p || (fs_stride == 0)) { bb_error_msg("Invalid stride parameter: %s", arg); r_usage++; continue; } } else if (!strcmp(token, "resize")) { unsigned long resize, bpg, rsv_groups; unsigned long group_desc_count, desc_blocks; unsigned int gdpb, blocksize; int rsv_gdb; if (!arg) { r_usage++; continue; } resize = parse_num_blocks(arg, sb_param->s_log_block_size); if (resize == 0) { bb_error_msg("Invalid resize parameter: %s", arg); r_usage++; continue; } if (resize <= sb_param->s_blocks_count) { bb_error_msg("The resize maximum must be greater " "than the filesystem size"); r_usage++; continue; } blocksize = EXT2_BLOCK_SIZE(sb_param); bpg = sb_param->s_blocks_per_group; if (!bpg) bpg = blocksize * 8; gdpb = blocksize / sizeof(struct ext2_group_desc); group_desc_count = (sb_param->s_blocks_count + bpg - 1) / bpg; desc_blocks = (group_desc_count + gdpb - 1) / gdpb; rsv_groups = (resize + bpg - 1) / bpg; rsv_gdb = (rsv_groups + gdpb - 1) / gdpb - desc_blocks; if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb_param)) rsv_gdb = EXT2_ADDR_PER_BLOCK(sb_param); if (rsv_gdb > 0) { sb_param->s_feature_compat |= EXT2_FEATURE_COMPAT_RESIZE_INODE; sb_param->s_reserved_gdt_blocks = rsv_gdb; } } else r_usage++; } if (r_usage) { bb_error_msg_and_die( "\nBad options specified.\n\n" "Extended options are separated by commas, " "and may take an argument which\n" "\tis set off by an equals ('=') sign.\n\n" "Valid extended options are:\n" "\tstride=<stride length in blocks>\n" "\tresize=<resize maximum size in blocks>\n"); } } static __u32 ok_features[3] = { EXT3_FEATURE_COMPAT_HAS_JOURNAL | EXT2_FEATURE_COMPAT_RESIZE_INODE | EXT2_FEATURE_COMPAT_DIR_INDEX, /* Compat */ EXT2_FEATURE_INCOMPAT_FILETYPE| /* Incompat */ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV| EXT2_FEATURE_INCOMPAT_META_BG, EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER /* R/O compat */ }; static int PRS(int argc, char **argv) { int c; int size; char * tmp; int blocksize = 0; int inode_ratio = 0; int inode_size = 0; int reserved_ratio = 5; int sector_size = 0; int show_version_only = 0; ext2_ino_t num_inodes = 0; errcode_t retval; char * extended_opts = 0; const char * fs_type = 0; blk_t dev_size; long sysval; /* Update our PATH to include /sbin */ e2fs_set_sbin_path(); tmp = getenv("MKE2FS_SYNC"); if (tmp) sync_kludge = atoi(tmp); /* Determine the system page size if possible */ #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE)) #define _SC_PAGESIZE _SC_PAGE_SIZE #endif #ifdef _SC_PAGESIZE sysval = sysconf(_SC_PAGESIZE); if (sysval > 0) sys_page_size = sysval; #endif /* _SC_PAGESIZE */ setbuf(stdout, NULL); setbuf(stderr, NULL); memset(¶m, 0, sizeof(struct ext2_super_block)); param.s_rev_level = 1; /* Create revision 1 filesystems now */ param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_FILETYPE; param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; #ifdef __linux__ linux_version_code = get_linux_version_code(); if (linux_version_code && linux_version_code < KERNEL_VERSION(2,2,0)) { param.s_rev_level = 0; param.s_feature_incompat = 0; param.s_feature_compat = 0; param.s_feature_ro_compat = 0; } #endif /* If called as mkfs.ext3, create a journal inode */ if (last_char_is(applet_name, '3')) journal_size = -1; while ((c = getopt (argc, argv, "b:cE:f:g:i:jl:m:no:qr:R:s:tvI:J:ST:FL:M:N:O:V")) != EOF) { switch (c) { case 'b': blocksize = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE); mke2fs_warning_msg((blocksize > 4096), "blocksize %d not usable on most systems", blocksize); param.s_log_block_size = int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); break; case 'c': /* Check for bad blocks */ case 't': /* deprecated */ cflag++; break; case 'f': size = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE); param.s_log_frag_size = int_log2(size >> EXT2_MIN_BLOCK_LOG_SIZE); mke2fs_warning_msg(1, "fragments not supported. Ignoring -f option"); break; case 'g': param.s_blocks_per_group = xatou32(optarg); if ((param.s_blocks_per_group % 8) != 0) { bb_error_msg_and_die("blocks per group must be multiple of 8"); } break; case 'i': /* Huh? is "* 1024" correct? */ inode_ratio = xatou_range(optarg, EXT2_MIN_BLOCK_SIZE, EXT2_MAX_BLOCK_SIZE * 1024); break; case 'J': parse_journal_opts(&journal_device, &journal_flags, &journal_size, optarg); break; case 'j': param.s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL; if (!journal_size) journal_size = -1; break; case 'l': bad_blocks_filename = optarg; break; case 'm': reserved_ratio = xatou_range(optarg, 0, 50); break; case 'n': noaction++; break; case 'o': creator_os = optarg; break; case 'r': param.s_rev_level = xatoi_u(optarg); if (param.s_rev_level == EXT2_GOOD_OLD_REV) { param.s_feature_incompat = 0; param.s_feature_compat = 0; param.s_feature_ro_compat = 0; } break; case 's': /* deprecated */ if (xatou(optarg)) param.s_feature_ro_compat |= EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; else param.s_feature_ro_compat &= ~EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER; break; #ifdef EXT2_DYNAMIC_REV case 'I': inode_size = xatoi_u(optarg); break; #endif case 'N': num_inodes = xatoi_u(optarg); break; case 'v': quiet = 0; break; case 'q': quiet = 1; break; case 'F': force = 1; break; case 'L': volume_label = optarg; break; case 'M': mount_dir = optarg; break; case 'O': if (!strcmp(optarg, "none")) { param.s_feature_compat = 0; param.s_feature_incompat = 0; param.s_feature_ro_compat = 0; break; } if (e2p_edit_feature(optarg, ¶m.s_feature_compat, ok_features)) { bb_error_msg_and_die("Invalid filesystem option set: %s", optarg); } break; case 'E': case 'R': extended_opts = optarg; break; case 'S': super_only = 1; break; case 'T': fs_type = optarg; break; case 'V': /* Print version number and exit */ show_version_only = 1; quiet = 0; break; default: bb_show_usage(); } } if ((optind == argc) /*&& !show_version_only*/) bb_show_usage(); device_name = argv[optind++]; mke2fs_verbose("mke2fs %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); if (show_version_only) { return 0; } /* * If there's no blocksize specified and there is a journal * device, use it to figure out the blocksize */ if (blocksize <= 0 && journal_device) { ext2_filsys jfs; io_manager io_ptr; #ifdef CONFIG_TESTIO_DEBUG io_ptr = test_io_manager; test_io_backing_manager = unix_io_manager; #else io_ptr = unix_io_manager; #endif retval = ext2fs_open(journal_device, EXT2_FLAG_JOURNAL_DEV_OK, 0, 0, io_ptr, &jfs); mke2fs_error_msg_and_die(retval, "open journal device %s", journal_device); if ((blocksize < 0) && (jfs->blocksize < (unsigned) (-blocksize))) { bb_error_msg_and_die( "Journal dev blocksize (%d) smaller than " "minimum blocksize %d\n", jfs->blocksize, -blocksize); } blocksize = jfs->blocksize; param.s_log_block_size = int_log2(blocksize >> EXT2_MIN_BLOCK_LOG_SIZE); ext2fs_close(jfs); } if (blocksize > sys_page_size) { mke2fs_warning_msg(1, "%d-byte blocks too big for system (max %d)", blocksize, sys_page_size); if (!force) { proceed_question(); } bb_error_msg("Forced to continue"); } mke2fs_warning_msg(((blocksize > 4096) && (param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)), "some 2.4 kernels do not support " "blocksizes greater than 4096 using ext3.\n" "Use -b 4096 if this is an issue for you\n"); if (optind < argc) { param.s_blocks_count = parse_num_blocks(argv[optind++], param.s_log_block_size); mke2fs_error_msg_and_die(!param.s_blocks_count, "invalid blocks count - %s", argv[optind - 1]); } if (optind < argc) bb_show_usage(); if (param.s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { if (!fs_type) fs_type = "journal"; reserved_ratio = 0; param.s_feature_incompat = EXT3_FEATURE_INCOMPAT_JOURNAL_DEV; param.s_feature_compat = 0; param.s_feature_ro_compat = 0; } if (param.s_rev_level == EXT2_GOOD_OLD_REV && (param.s_feature_compat || param.s_feature_ro_compat || param.s_feature_incompat)) param.s_rev_level = 1; /* Create a revision 1 filesystem */ check_plausibility(device_name , force); check_mount(device_name, force, "filesystem"); param.s_log_frag_size = param.s_log_block_size; if (noaction && param.s_blocks_count) { dev_size = param.s_blocks_count; retval = 0; } else { retry: retval = ext2fs_get_device_size(device_name, EXT2_BLOCK_SIZE(¶m), &dev_size); if ((retval == EFBIG) && (blocksize == 0) && (param.s_log_block_size == 0)) { param.s_log_block_size = 2; blocksize = 4096; goto retry; } } mke2fs_error_msg_and_die((retval && (retval != EXT2_ET_UNIMPLEMENTED)),"determine filesystem size"); if (!param.s_blocks_count) { if (retval == EXT2_ET_UNIMPLEMENTED) { mke2fs_error_msg_and_die(1, "determine device size; you " "must specify\nthe size of the " "filesystem"); } else { if (dev_size == 0) { bb_error_msg_and_die( "Device size reported to be zero. " "Invalid partition specified, or\n\t" "partition table wasn't reread " "after running fdisk, due to\n\t" "a modified partition being busy " "and in use. You may need to reboot\n\t" "to re-read your partition table.\n" ); } param.s_blocks_count = dev_size; if (sys_page_size > EXT2_BLOCK_SIZE(¶m)) param.s_blocks_count &= ~((sys_page_size / EXT2_BLOCK_SIZE(¶m))-1); } } else if (!force && (param.s_blocks_count > dev_size)) { bb_error_msg("Filesystem larger than apparent device size"); proceed_question(); } /* * If the user asked for HAS_JOURNAL, then make sure a journal * gets created. */ if ((param.s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) && !journal_size) journal_size = -1; /* Set first meta blockgroup via an environment variable */ /* (this is mostly for debugging purposes) */ if ((param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) && ((tmp = getenv("MKE2FS_FIRST_META_BG")))) param.s_first_meta_bg = atoi(tmp); /* Get the hardware sector size, if available */ retval = ext2fs_get_device_sectsize(device_name, §or_size); mke2fs_error_msg_and_die(retval, "determine hardware sector size"); if ((tmp = getenv("MKE2FS_DEVICE_SECTSIZE")) != NULL) sector_size = atoi(tmp); set_fs_defaults(fs_type, ¶m, blocksize, sector_size, &inode_ratio); blocksize = EXT2_BLOCK_SIZE(¶m); if (extended_opts) parse_extended_opts(¶m, extended_opts); /* Since sparse_super is the default, we would only have a problem * here if it was explicitly disabled. */ if ((param.s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) && !(param.s_feature_ro_compat&EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) { bb_error_msg_and_die("reserved online resize blocks not supported " "on non-sparse filesystem"); } if (param.s_blocks_per_group) { if (param.s_blocks_per_group < 256 || param.s_blocks_per_group > 8 * (unsigned) blocksize) { bb_error_msg_and_die("blocks per group count out of range"); } } if (!force && param.s_blocks_count >= (1 << 31)) { bb_error_msg_and_die("Filesystem too large. No more than 2**31-1 blocks\n" "\t (8TB using a blocksize of 4k) are currently supported."); } if (inode_size) { if (inode_size < EXT2_GOOD_OLD_INODE_SIZE || inode_size > EXT2_BLOCK_SIZE(¶m) || inode_size & (inode_size - 1)) { bb_error_msg_and_die("invalid inode size %d (min %d/max %d)", inode_size, EXT2_GOOD_OLD_INODE_SIZE, blocksize); } mke2fs_warning_msg((inode_size != EXT2_GOOD_OLD_INODE_SIZE), "%d-byte inodes not usable on most systems", inode_size); param.s_inode_size = inode_size; } /* * Calculate number of inodes based on the inode ratio */ param.s_inodes_count = num_inodes ? num_inodes : ((__u64) param.s_blocks_count * blocksize) / inode_ratio; /* * Calculate number of blocks to reserve */ param.s_r_blocks_count = (param.s_blocks_count * reserved_ratio) / 100; return 1; } static void mke2fs_clean_up(void) { if (ENABLE_FEATURE_CLEAN_UP && journal_device) free(journal_device); } int mke2fs_main (int argc, char **argv); int mke2fs_main (int argc, char **argv) { errcode_t retval; ext2_filsys fs; badblocks_list bb_list = 0; unsigned int i; int val; io_manager io_ptr; if (ENABLE_FEATURE_CLEAN_UP) atexit(mke2fs_clean_up); if(!PRS(argc, argv)) return 0; #ifdef CONFIG_TESTIO_DEBUG io_ptr = test_io_manager; test_io_backing_manager = unix_io_manager; #else io_ptr = unix_io_manager; #endif /* * Initialize the superblock.... */ retval = ext2fs_initialize(device_name, 0, ¶m, io_ptr, &fs); mke2fs_error_msg_and_die(retval, "set up superblock"); /* * Wipe out the old on-disk superblock */ if (!noaction) zap_sector(fs, 2, 6); /* * Generate a UUID for it... */ uuid_generate(fs->super->s_uuid); /* * Initialize the directory index variables */ fs->super->s_def_hash_version = EXT2_HASH_TEA; uuid_generate((unsigned char *) fs->super->s_hash_seed); /* * Add "jitter" to the superblock's check interval so that we * don't check all the filesystems at the same time. We use a * kludgy hack of using the UUID to derive a random jitter value. */ for (i = 0, val = 0; i < sizeof(fs->super->s_uuid); i++) val += fs->super->s_uuid[i]; fs->super->s_max_mnt_count += val % EXT2_DFL_MAX_MNT_COUNT; /* * Override the creator OS, if applicable */ if (creator_os && !set_os(fs->super, creator_os)) { bb_error_msg_and_die("unknown os - %s", creator_os); } /* * For the Hurd, we will turn off filetype since it doesn't * support it. */ if (fs->super->s_creator_os == EXT2_OS_HURD) fs->super->s_feature_incompat &= ~EXT2_FEATURE_INCOMPAT_FILETYPE; /* * Set the volume label... */ if (volume_label) { snprintf(fs->super->s_volume_name, sizeof(fs->super->s_volume_name), "%s", volume_label); } /* * Set the last mount directory */ if (mount_dir) { snprintf(fs->super->s_last_mounted, sizeof(fs->super->s_last_mounted), "%s", mount_dir); } if (!quiet || noaction) show_stats(fs); if (noaction) return 0; if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { create_journal_dev(fs); return (ext2fs_close(fs) ? 1 : 0); } if (bad_blocks_filename) read_bb_file(fs, &bb_list, bad_blocks_filename); if (cflag) test_disk(fs, &bb_list); handle_bad_blocks(fs, bb_list); fs->stride = fs_stride; retval = ext2fs_allocate_tables(fs); mke2fs_error_msg_and_die(retval, "allocate filesystem tables"); if (super_only) { fs->super->s_state |= EXT2_ERROR_FS; fs->flags &= ~(EXT2_FLAG_IB_DIRTY|EXT2_FLAG_BB_DIRTY); } else { /* rsv must be a power of two (64kB is MD RAID sb alignment) */ unsigned int rsv = 65536 / fs->blocksize; unsigned long blocks = fs->super->s_blocks_count; unsigned long start; blk_t ret_blk; #ifdef ZAP_BOOTBLOCK zap_sector(fs, 0, 2); #endif /* * Wipe out any old MD RAID (or other) metadata at the end * of the device. This will also verify that the device is * as large as we think. Be careful with very small devices. */ start = (blocks & ~(rsv - 1)); if (start > rsv) start -= rsv; if (start > 0) retval = zero_blocks(fs, start, blocks - start, NULL, &ret_blk, NULL); mke2fs_warning_msg(retval, "cannot zero block %u at end of filesystem", ret_blk); write_inode_tables(fs); create_root_dir(fs); create_lost_and_found(fs); reserve_inodes(fs); create_bad_block_inode(fs, bb_list); if (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE) { retval = ext2fs_create_resize_inode(fs); mke2fs_error_msg_and_die(retval, "reserve blocks for online resize"); } } if (journal_device) { make_journal_device(journal_device, fs, quiet, force); } else if (journal_size) { make_journal_blocks(fs, journal_size, journal_flags, quiet); } mke2fs_verbose("Writing superblocks and filesystem accounting information: "); retval = ext2fs_flush(fs); mke2fs_warning_msg(retval, "had trouble writing out superblocks"); mke2fs_verbose_done(); if (!quiet && !getenv("MKE2FS_SKIP_CHECK_MSG")) print_check_message(fs); val = ext2fs_close(fs); return (retval || val) ? 1 : 0; } |