misc/dumpe2fs.c

   1 /*
   2  * dumpe2fs.c           - List the control structures of a second
   3  *                        extended filesystem
   4  *
   5  * Copyright (C) 1992, 1993, 1994  Remy Card <card@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                 ext2fs_super_and_bgd_loc(fs, i, &super_blk,
 157                                          &old_desc_blk, &new_desc_blk, 0);
 158                 if (i == fs->group_desc_count - 1)
 159                         last_block = fs->super->s_blocks_count - 1;
 160                 else
 161                         last_block = first_block +
 162                                      fs->super->s_blocks_per_group - 1;
 163
 164                 printf (_("Group %lu: (Blocks "), i);
 165                 print_range(first_block, last_block);
 166                 fputs(")", stdout);
 167                 print_bg_opts(fs, i);
 168                 has_super = ((i==0) || super_blk);
 169                 if (has_super) {
 170                         printf (_("  %s superblock at "),
 171                                 i == 0 ? _("Primary") : _("Backup"));
 172                         print_number(super_blk);
 173                 }
 174                 if (old_desc_blk) {
 175                         printf(_(", Group descriptors at "));
 176                         print_range(old_desc_blk,
 177                                     old_desc_blk + old_desc_blocks - 1);
 178                         if (reserved_gdt) {
 179                                 printf(_("\n  Reserved GDT blocks at "));
 180                                 print_range(old_desc_blk + old_desc_blocks,
 181                                             old_desc_blk + old_desc_blocks +
 182                                             reserved_gdt - 1);
 183                         }
 184                 } else if (new_desc_blk) {
 185                         fputc(has_super ? ',' : ' ', stdout);
 186                         printf(_(" Group descriptor at "));
 187                         print_number(new_desc_blk);
 188                         has_super++;
 189                 }
 190                 if (has_super)
 191                         fputc('\n', stdout);
 192                 fputs(_("  Block bitmap at "), stdout);
 193                 print_number(fs->group_desc[i].bg_block_bitmap);
 194                 diff = fs->group_desc[i].bg_block_bitmap - first_block;
 195                 if (diff >= 0)
 196                         printf(" (+%ld)", diff);
 197                 fputs(_(", Inode bitmap at "), stdout);
 198                 print_number(fs->group_desc[i].bg_inode_bitmap);
 199                 diff = fs->group_desc[i].bg_inode_bitmap - first_block;
 200                 if (diff >= 0)
 201                         printf(" (+%ld)", diff);
 202                 fputs(_("\n  Inode table at "), stdout);
 203                 print_range(fs->group_desc[i].bg_inode_table,
 204                             fs->group_desc[i].bg_inode_table +
 205                             inode_blocks_per_group - 1);
 206                 diff = fs->group_desc[i].bg_inode_table - first_block;
 207                 if (diff > 0)
 208                         printf(" (+%ld)", diff);
 209                 printf (_("\n  %d free blocks, %d free inodes, "
 210                           "%d directories\n"),
 211                         fs->group_desc[i].bg_free_blocks_count,
 212                         fs->group_desc[i].bg_free_inodes_count,
 213                         fs->group_desc[i].bg_used_dirs_count);
 214                 if (block_bitmap) {
 215                         fputs(_("  Free blocks: "), stdout);
 216                         print_free (i, block_bitmap,
 217                                     fs->super->s_blocks_per_group,
 218                                     fs->super->s_first_data_block);
 219                         fputc('\n', stdout);
 220                         block_bitmap += fs->super->s_blocks_per_group / 8;
 221                 }
 222                 if (inode_bitmap) {
 223                         fputs(_("  Free inodes: "), stdout);
 224                         print_free (i, inode_bitmap,
 225                                     fs->super->s_inodes_per_group, 1);
 226                         fputc('\n', stdout);
 227                         inode_bitmap += fs->super->s_inodes_per_group / 8;
 228                 }
 229                 first_block += fs->super->s_blocks_per_group;
 230         }
 231 }
 232
 233 static void list_bad_blocks(ext2_filsys fs, int dump)
 234 {
 235         badblocks_list          bb_list = 0;
 236         badblocks_iterate       bb_iter;
 237         blk_t                   blk;
 238         errcode_t               retval;
 239         const char              *header, *fmt;
 240
 241         retval = ext2fs_read_bb_inode(fs, &bb_list);
 242         if (retval) {
 243                 com_err("ext2fs_read_bb_inode", retval, 0);
 244                 return;
 245         }
 246         retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
 247         if (retval) {
 248                 com_err("ext2fs_badblocks_list_iterate_begin", retval,
 249                         _("while printing bad block list"));
 250                 return;
 251         }
 252         if (dump) {
 253                 header = fmt = "%d\n";
 254         } else {
 255                 header =  _("Bad blocks: %d");
 256                 fmt = ", %d";
 257         }
 258         while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
 259                 printf(header ? header : fmt, blk);
 260                 header = 0;
 261         }
 262         ext2fs_badblocks_list_iterate_end(bb_iter);
 263         if (!dump)
 264                 fputc('\n', stdout);
 265 }
 266
 267 static void print_inline_journal_information(ext2_filsys fs)
 268 {
 269         struct ext2_inode       inode;
 270         errcode_t               retval;
 271         ino_t                   ino = fs->super->s_journal_inum;
 272         int                     size;
 273
 274         retval = ext2fs_read_inode(fs, ino,  &inode);
 275         if (retval) {
 276                 com_err(program_name, retval,
 277                         _("while reading journal inode"));
 278                 exit(1);
 279         }
 280         fputs(_("Journal size:             "), stdout);
 281         size = inode.i_blocks >> 1;
 282         if (size < 8192)
 283                 printf("%uk\n", size);
 284         else
 285                 printf("%uM\n", size >> 10);
 286 }
 287
 288 static void print_journal_information(ext2_filsys fs)
 289 {
 290         errcode_t       retval;
 291         char            buf[1024];
 292         char            str[80];
 293         unsigned int    i;
 294         journal_superblock_t    *jsb;
 295
 296         /* Get the journal superblock */
 297         if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
 298                 com_err(program_name, retval,
 299                         _("while reading journal superblock"));
 300                 exit(1);
 301         }
 302         jsb = (journal_superblock_t *) buf;
 303         if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
 304             (jsb->s_header.h_blocktype !=
 305              (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
 306                 com_err(program_name, 0,
 307                         _("Couldn't find journal superblock magic numbers"));
 308                 exit(1);
 309         }
 310
 311         printf(_("\nJournal block size:       %u\n"
 312                  "Journal length:           %u\n"
 313                  "Journal first block:      %u\n"
 314                  "Journal sequence:         0x%08x\n"
 315                  "Journal start:            %u\n"
 316                  "Journal number of users:  %u\n"),
 317                (unsigned int)ntohl(jsb->s_blocksize),  (unsigned int)ntohl(jsb->s_maxlen),
 318                (unsigned int)ntohl(jsb->s_first), (unsigned int)ntohl(jsb->s_sequence),
 319                (unsigned int)ntohl(jsb->s_start), (unsigned int)ntohl(jsb->s_nr_users));
 320
 321         for (i=0; i < ntohl(jsb->s_nr_users); i++) {
 322                 uuid_unparse(&jsb->s_users[i*16], str);
 323                 printf(i ? "                          %s\n"
 324                        : _("Journal users:            %s\n"),
 325                        str);
 326         }
 327 }
 328
 329 int main (int argc, char ** argv)
 330 {
 331         errcode_t       retval;
 332         ext2_filsys     fs;
 333         int             print_badblocks = 0;
 334         int             use_superblock = 0;
 335         int             use_blocksize = 0;
 336         int             image_dump = 0;
 337         int             force = 0;
 338         int             flags;
 339         int             header_only = 0;
 340         int             big_endian;
 341         int             c;
 342
 343 #ifdef ENABLE_NLS
 344         setlocale(LC_MESSAGES, "");
 345         setlocale(LC_CTYPE, "");
 346         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 347         textdomain(NLS_CAT_NAME);
 348 #endif
 349         initialize_ext2_error_table();
 350         fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
 351                  E2FSPROGS_DATE);
 352         if (argc && *argv)
 353                 program_name = *argv;
 354
 355         while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
 356                 switch (c) {
 357                 case 'b':
 358                         print_badblocks++;
 359                         break;
 360                 case 'f':
 361                         force++;
 362                         break;
 363                 case 'h':
 364                         header_only++;
 365                         break;
 366                 case 'i':
 367                         image_dump++;
 368                         break;
 369                 case 'o':
 370                         if (optarg[0] == 'b')
 371                                 use_superblock = atoi(optarg+1);
 372                         else if (optarg[0] == 'B')
 373                                 use_blocksize = atoi(optarg+1);
 374                         else
 375                                 usage();
 376                         break;
 377                 case 'V':
 378                         /* Print version number and exit */
 379                         fprintf(stderr, _("\tUsing %s\n"),
 380                                 error_message(EXT2_ET_BASE));
 381                         exit(0);
 382                 case 'x':
 383                         hex_format++;
 384                         break;
 385                 default:
 386                         usage();
 387                 }
 388         }
 389         if (optind > argc - 1)
 390                 usage();
 391         device_name = argv[optind++];
 392         if (use_superblock && !use_blocksize)
 393                 use_blocksize = 1024;
 394         flags = EXT2_FLAG_JOURNAL_DEV_OK;
 395         if (force)
 396                 flags |= EXT2_FLAG_FORCE;
 397         if (image_dump)
 398                 flags |= EXT2_FLAG_IMAGE_FILE;
 399
 400         retval = ext2fs_open (device_name, flags, use_superblock,
 401                               use_blocksize, unix_io_manager, &fs);
 402         if (retval) {
 403                 com_err (program_name, retval, _("while trying to open %s"),
 404                          device_name);
 405                 printf (_("Couldn't find valid filesystem superblock.\n"));
 406                 exit (1);
 407         }
 408         if (print_badblocks) {
 409                 list_bad_blocks(fs, 1);
 410         } else {
 411                 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
 412 #ifdef WORDS_BIGENDIAN
 413                 big_endian = !big_endian;
 414 #endif
 415                 if (big_endian)
 416                         printf(_("Note: This is a byte-swapped filesystem\n"));
 417                 list_super (fs->super);
 418                 if (fs->super->s_feature_incompat &
 419                       EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
 420                         print_journal_information(fs);
 421                         ext2fs_close(fs);
 422                         exit(0);
 423                 }
 424                 if (fs->super->s_feature_compat &
 425                       EXT3_FEATURE_COMPAT_HAS_JOURNAL)
 426                         print_inline_journal_information(fs);
 427                 list_bad_blocks(fs, 0);
 428                 if (header_only) {
 429                         ext2fs_close (fs);
 430                         exit (0);
 431                 }
 432                 retval = ext2fs_read_bitmaps (fs);
 433                 list_desc (fs);
 434                 if (retval) {
 435                         printf(_("\n%s: %s: error reading bitmaps: %s\n"),
 436                                program_name, device_name,
 437                                error_message(retval));
 438                 }
 439         }
 440         ext2fs_close (fs);
 441         exit (0);
 442 }