1 /* 2 * dumpe2fs.c - List the control structures of a second 3 * extended filesystem 4 * 5 * Copyright (C) 1992, 1993, 1994 Remy Card <card (at) masi.ibp.fr> 6 * Laboratoire MASI, Institut Blaise Pascal 7 * Universite Pierre et Marie Curie (Paris VI) 8 * 9 * Copyright 1995, 1996, 1997 by Theodore Ts'o. 10 * 11 * %Begin-Header% 12 * This file may be redistributed under the terms of the GNU Public 13 * License. 14 * %End-Header% 15 */ 16 17 /* 18 * History: 19 * 94/01/09 - Creation 20 * 94/02/27 - Ported to use the ext2fs library 21 */ 22 23 #ifdef HAVE_GETOPT_H 24 #include <getopt.h> 25 #else 26 extern char *optarg; 27 extern int optind; 28 #endif 29 #include <fcntl.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 35 #include "ext2fs/ext2_fs.h" 36 37 #include "ext2fs/ext2fs.h" 38 #include "e2p/e2p.h" 39 #include "jfs_user.h" 40 #include <uuid/uuid.h> 41 42 #include "../version.h" 43 #include "nls-enable.h" 44 45 #define in_use(m, x) (ext2fs_test_bit ((x), (m))) 46 47 const char * program_name = "dumpe2fs"; 48 char * device_name = NULL; 49 int hex_format = 0; 50 51 static void usage(void) 52 { 53 fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] " 54 "[-oB blocksize] device\n"), program_name); 55 exit (1); 56 } 57 58 static void print_number(unsigned long num) 59 { 60 if (hex_format) 61 printf("0x%04lx", num); 62 else 63 printf("%lu", num); 64 } 65 66 static void print_range(unsigned long a, unsigned long b) 67 { 68 if (hex_format) 69 printf("0x%04lx-0x%04lx", a, b); 70 else 71 printf("%lu-%lu", a, b); 72 } 73 74 static void print_free (unsigned long group, char * bitmap, 75 unsigned long nbytes, unsigned long offset) 76 { 77 int p = 0; 78 unsigned long i; 79 unsigned long j; 80 81 offset += group * nbytes; 82 for (i = 0; i < nbytes; i++) 83 if (!in_use (bitmap, i)) 84 { 85 if (p) 86 printf (", "); 87 print_number(i + offset); 88 for (j = i; j < nbytes && !in_use (bitmap, j); j++) 89 ; 90 if (--j != i) { 91 fputc('-', stdout); 92 print_number(j + offset); 93 i = j; 94 } 95 p = 1; 96 } 97 } 98 99 static void print_bg_opt(int bg_flags, int mask, 100 const char *str, int *first) 101 { 102 if (bg_flags & mask) { 103 if (*first) { 104 fputs(" [", stdout); 105 *first = 0; 106 } else 107 fputs(", ", stdout); 108 fputs(str, stdout); 109 } 110 } 111 static void print_bg_opts(ext2_filsys fs, dgrp_t i) 112 { 113 int first = 1, bg_flags; 114 115 if (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_LAZY_BG) 116 bg_flags = fs->group_desc[i].bg_flags; 117 else 118 bg_flags = 0; 119 120 print_bg_opt(bg_flags, EXT2_BG_INODE_UNINIT, "Inode not init", 121 &first); 122 print_bg_opt(bg_flags, EXT2_BG_BLOCK_UNINIT, "Block not init", 123 &first); 124 if (!first) 125 fputc(']', stdout); 126 fputc('\n', stdout); 127 } 128 129 static void list_desc (ext2_filsys fs) 130 { 131 unsigned long i; 132 long diff; 133 blk_t first_block, last_block; 134 blk_t super_blk, old_desc_blk, new_desc_blk; 135 char *block_bitmap=NULL, *inode_bitmap=NULL; 136 int inode_blocks_per_group, old_desc_blocks, reserved_gdt; 137 int has_super; 138 139 if (fs->block_map) 140 block_bitmap = fs->block_map->bitmap; 141 if (fs->inode_map) 142 inode_bitmap = fs->inode_map->bitmap; 143 144 inode_blocks_per_group = ((fs->super->s_inodes_per_group * 145 EXT2_INODE_SIZE(fs->super)) + 146 EXT2_BLOCK_SIZE(fs->super) - 1) / 147 EXT2_BLOCK_SIZE(fs->super); 148 reserved_gdt = fs->super->s_reserved_gdt_blocks; 149 fputc('\n', stdout); 150 first_block = fs->super->s_first_data_block; 151 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) 152 old_desc_blocks = fs->super->s_first_meta_bg; 153 else 154 old_desc_blocks = fs->desc_blocks; 155 for (i = 0; i < fs->group_desc_count; i++) { 156 first_block = ext2fs_group_first_block(fs, i); 157 last_block = ext2fs_group_last_block(fs, i); 158 159 ext2fs_super_and_bgd_loc(fs, i, &super_blk, 160 &old_desc_blk, &new_desc_blk, 0); 161 162 printf (_("Group %lu: (Blocks "), i); 163 print_range(first_block, last_block); 164 fputs(")", stdout); 165 print_bg_opts(fs, i); 166 has_super = ((i==0) || super_blk); 167 if (has_super) { 168 printf (_(" %s superblock at "), 169 i == 0 ? _("Primary") : _("Backup")); 170 print_number(super_blk); 171 } 172 if (old_desc_blk) { 173 printf(_(", Group descriptors at ")); 174 print_range(old_desc_blk, 175 old_desc_blk + old_desc_blocks - 1); 176 if (reserved_gdt) { 177 printf(_("\n Reserved GDT blocks at ")); 178 print_range(old_desc_blk + old_desc_blocks, 179 old_desc_blk + old_desc_blocks + 180 reserved_gdt - 1); 181 } 182 } else if (new_desc_blk) { 183 fputc(has_super ? ',' : ' ', stdout); 184 printf(_(" Group descriptor at ")); 185 print_number(new_desc_blk); 186 has_super++; 187 } 188 if (has_super) 189 fputc('\n', stdout); 190 fputs(_(" Block bitmap at "), stdout); 191 print_number(fs->group_desc[i].bg_block_bitmap); 192 diff = fs->group_desc[i].bg_block_bitmap - first_block; 193 if (diff >= 0) 194 printf(" (+%ld)", diff); 195 fputs(_(", Inode bitmap at "), stdout); 196 print_number(fs->group_desc[i].bg_inode_bitmap); 197 diff = fs->group_desc[i].bg_inode_bitmap - first_block; 198 if (diff >= 0) 199 printf(" (+%ld)", diff); 200 fputs(_("\n Inode table at "), stdout); 201 print_range(fs->group_desc[i].bg_inode_table, 202 fs->group_desc[i].bg_inode_table + 203 inode_blocks_per_group - 1); 204 diff = fs->group_desc[i].bg_inode_table - first_block; 205 if (diff > 0) 206 printf(" (+%ld)", diff); 207 printf (_("\n %d free blocks, %d free inodes, " 208 "%d directories\n"), 209 fs->group_desc[i].bg_free_blocks_count, 210 fs->group_desc[i].bg_free_inodes_count, 211 fs->group_desc[i].bg_used_dirs_count); 212 if (block_bitmap) { 213 fputs(_(" Free blocks: "), stdout); 214 print_free (i, block_bitmap, 215 fs->super->s_blocks_per_group, 216 fs->super->s_first_data_block); 217 fputc('\n', stdout); 218 block_bitmap += fs->super->s_blocks_per_group / 8; 219 } 220 if (inode_bitmap) { 221 fputs(_(" Free inodes: "), stdout); 222 print_free (i, inode_bitmap, 223 fs->super->s_inodes_per_group, 1); 224 fputc('\n', stdout); 225 inode_bitmap += fs->super->s_inodes_per_group / 8; 226 } 227 } 228 } 229 230 static void list_bad_blocks(ext2_filsys fs, int dump) 231 { 232 badblocks_list bb_list = 0; 233 badblocks_iterate bb_iter; 234 blk_t blk; 235 errcode_t retval; 236 const char *header, *fmt; 237 238 retval = ext2fs_read_bb_inode(fs, &bb_list); 239 if (retval) { 240 com_err("ext2fs_read_bb_inode", retval, 0); 241 return; 242 } 243 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter); 244 if (retval) { 245 com_err("ext2fs_badblocks_list_iterate_begin", retval, 246 _("while printing bad block list")); 247 return; 248 } 249 if (dump) { 250 header = fmt = "%u\n"; 251 } else { 252 header = _("Bad blocks: %u"); 253 fmt = ", %u"; 254 } 255 while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) { 256 printf(header ? header : fmt, blk); 257 header = 0; 258 } 259 ext2fs_badblocks_list_iterate_end(bb_iter); 260 if (!dump) 261 fputc('\n', stdout); 262 } 263 264 static void print_inline_journal_information(ext2_filsys fs) 265 { 266 struct ext2_inode inode; 267 errcode_t retval; 268 ino_t ino = fs->super->s_journal_inum; 269 int size; 270 271 retval = ext2fs_read_inode(fs, ino, &inode); 272 if (retval) { 273 com_err(program_name, retval, 274 _("while reading journal inode")); 275 exit(1); 276 } 277 fputs(_("Journal size: "), stdout); 278 size = inode.i_blocks >> 1; 279 if (size < 8192) 280 printf("%uk\n", size); 281 else 282 printf("%uM\n", size >> 10); 283 } 284 285 static void print_journal_information(ext2_filsys fs) 286 { 287 errcode_t retval; 288 char buf[1024]; 289 char str[80]; 290 unsigned int i; 291 journal_superblock_t *jsb; 292 293 /* Get the journal superblock */ 294 if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) { 295 com_err(program_name, retval, 296 _("while reading journal superblock")); 297 exit(1); 298 } 299 jsb = (journal_superblock_t *) buf; 300 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) || 301 (jsb->s_header.h_blocktype != 302 (unsigned) ntohl(JFS_SUPERBLOCK_V2))) { 303 com_err(program_name, 0, 304 _("Couldn't find journal superblock magic numbers")); 305 exit(1); 306 } 307 308 printf(_("\nJournal block size: %u\n" 309 "Journal length: %u\n" 310 "Journal first block: %u\n" 311 "Journal sequence: 0x%08x\n" 312 "Journal start: %u\n" 313 "Journal number of users: %u\n"), 314 (unsigned int)ntohl(jsb->s_blocksize), (unsigned int)ntohl(jsb->s_maxlen), 315 (unsigned int)ntohl(jsb->s_first), (unsigned int)ntohl(jsb->s_sequence), 316 (unsigned int)ntohl(jsb->s_start), (unsigned int)ntohl(jsb->s_nr_users)); 317 318 for (i=0; i < ntohl(jsb->s_nr_users); i++) { 319 uuid_unparse(&jsb->s_users[i*16], str); 320 printf(i ? " %s\n" 321 : _("Journal users: %s\n"), 322 str); 323 } 324 } 325 326 static void parse_extended_opts(const char *opts, blk_t *superblock, 327 int *blocksize) 328 { 329 char *buf, *token, *next, *p, *arg, *badopt = ""; 330 int len; 331 int usage = 0; 332 333 len = strlen(opts); 334 buf = malloc(len+1); 335 if (!buf) { 336 fprintf(stderr, 337 _("Couldn't allocate memory to parse options!\n")); 338 exit(1); 339 } 340 strcpy(buf, opts); 341 for (token = buf; token && *token; token = next) { 342 p = strchr(token, ','); 343 next = 0; 344 if (p) { 345 *p = 0; 346 next = p+1; 347 } 348 arg = strchr(token, '='); 349 if (arg) { 350 *arg = 0; 351 arg++; 352 } 353 if (strcmp(token, "superblock") == 0 || 354 strcmp(token, "sb") == 0) { 355 if (!arg) { 356 usage++; 357 badopt = token; 358 continue; 359 } 360 *superblock = strtoul(arg, &p, 0); 361 if (*p) { 362 fprintf(stderr, 363 _("Invalid superblock parameter: %s\n"), 364 arg); 365 usage++; 366 continue; 367 } 368 } else if (strcmp(token, "blocksize") == 0 || 369 strcmp(token, "bs") == 0) { 370 if (!arg) { 371 usage++; 372 badopt = token; 373 continue; 374 } 375 *blocksize = strtoul(arg, &p, 0); 376 if (*p) { 377 fprintf(stderr, 378 _("Invalid blocksize parameter: %s\n"), 379 arg); 380 usage++; 381 continue; 382 } 383 } else { 384 usage++; 385 badopt = token; 386 } 387 } 388 if (usage) { 389 fprintf(stderr, _("\nBad extended option(s) specified: %s\n\n" 390 "Extended options are separated by commas, " 391 "and may take an argument which\n" 392 "\tis set off by an equals ('=') sign.\n\n" 393 "Valid extended options are:\n" 394 "\tsuperblock=<superblock number>\n" 395 "\tblocksize=<blocksize>\n"), 396 badopt); 397 free(buf); 398 exit(1); 399 } 400 free(buf); 401 } 402 403 int main (int argc, char ** argv) 404 { 405 errcode_t retval; 406 ext2_filsys fs; 407 int print_badblocks = 0; 408 int use_superblock = 0; 409 int use_blocksize = 0; 410 int image_dump = 0; 411 int force = 0; 412 int flags; 413 int header_only = 0; 414 int big_endian; 415 int c; 416 417 #ifdef ENABLE_NLS 418 setlocale(LC_MESSAGES, ""); 419 setlocale(LC_CTYPE, ""); 420 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 421 textdomain(NLS_CAT_NAME); 422 #endif 423 add_error_table(&et_ext2_error_table); 424 fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION, 425 E2FSPROGS_DATE); 426 if (argc && *argv) 427 program_name = *argv; 428 429 while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) { 430 switch (c) { 431 case 'b': 432 print_badblocks++; 433 break; 434 case 'f': 435 force++; 436 break; 437 case 'h': 438 header_only++; 439 break; 440 case 'i': 441 image_dump++; 442 break; 443 case 'o': 444 parse_extended_opts(optarg, &use_superblock, 445 &use_blocksize); 446 break; 447 case 'V': 448 /* Print version number and exit */ 449 fprintf(stderr, _("\tUsing %s\n"), 450 error_message(EXT2_ET_BASE)); 451 exit(0); 452 case 'x': 453 hex_format++; 454 break; 455 default: 456 usage(); 457 } 458 } 459 if (optind > argc - 1) 460 usage(); 461 device_name = argv[optind++]; 462 flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES; 463 if (force) 464 flags |= EXT2_FLAG_FORCE; 465 if (image_dump) 466 flags |= EXT2_FLAG_IMAGE_FILE; 467 468 if (use_superblock && !use_blocksize) { 469 for (use_blocksize = EXT2_MIN_BLOCK_SIZE; 470 use_blocksize <= EXT2_MAX_BLOCK_SIZE; 471 use_blocksize *= 2) { 472 retval = ext2fs_open (device_name, flags, 473 use_superblock, 474 use_blocksize, unix_io_manager, 475 &fs); 476 if (!retval) 477 break; 478 } 479 } else 480 retval = ext2fs_open (device_name, flags, use_superblock, 481 use_blocksize, unix_io_manager, &fs); 482 if (retval) { 483 com_err (program_name, retval, _("while trying to open %s"), 484 device_name); 485 printf (_("Couldn't find valid filesystem superblock.\n")); 486 exit (1); 487 } 488 if (print_badblocks) { 489 list_bad_blocks(fs, 1); 490 } else { 491 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0); 492 #ifdef WORDS_BIGENDIAN 493 big_endian = !big_endian; 494 #endif 495 if (big_endian) 496 printf(_("Note: This is a byte-swapped filesystem\n")); 497 list_super (fs->super); 498 if (fs->super->s_feature_incompat & 499 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) { 500 print_journal_information(fs); 501 ext2fs_close(fs); 502 exit(0); 503 } 504 if (fs->super->s_feature_compat & 505 EXT3_FEATURE_COMPAT_HAS_JOURNAL) 506 print_inline_journal_information(fs); 507 list_bad_blocks(fs, 0); 508 if (header_only) { 509 ext2fs_close (fs); 510 exit (0); 511 } 512 retval = ext2fs_read_bitmaps (fs); 513 list_desc (fs); 514 if (retval) { 515 printf(_("\n%s: %s: error reading bitmaps: %s\n"), 516 program_name, device_name, 517 error_message(retval)); 518 } 519 } 520 ext2fs_close (fs); 521 remove_error_table(&et_ext2_error_table); 522 exit (0); 523 } 524
