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
  41 #include "../version.h"
  42 #include "nls-enable.h"
  43
  44 #define in_use(m, x)    (ext2fs_test_bit ((x), (m)))
  45
  46 const char * program_name = "dumpe2fs";
  47 char * device_name = NULL;
  48 int opt_hex = 0;
  49
  50 static void usage(void)
  51 {
  52         fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
  53                  "[-oB blocksize] device\n"), program_name);
  54         exit (1);
  55 }
  56
  57 static void print_free (unsigned long group, char * bitmap,
  58                         unsigned long nbytes, unsigned long offset)
  59 {
  60         int p = 0;
  61         unsigned long i;
  62         unsigned long j;
  63
  64         for (i = 0; i < nbytes; i++)
  65                 if (!in_use (bitmap, i))
  66                 {
  67                         if (p)
  68                                 printf (", ");
  69                         if (i == nbytes - 1 || in_use (bitmap, i + 1))
  70                                 printf (opt_hex ? "0x%04x" : "%lu",
  71                                         group * nbytes + i + offset);
  72                         else
  73                         {
  74                                 for (j = i; j < nbytes && !in_use (bitmap, j);
  75                                      j++)
  76                                         ;
  77                                 printf (opt_hex ? "0x%04lx-0x%04lx" :
  78                                         "%lu-%lu", group * nbytes + i + offset,
  79                                         group * nbytes + (j - 1) + offset);
  80                                 i = j - 1;
  81                         }
  82                         p = 1;
  83                 }
  84 }
  85
  86 static void list_desc (ext2_filsys fs)
  87 {
  88         unsigned long i;
  89         blk_t   group_blk, next_blk;
  90         char * block_bitmap = fs->block_map->bitmap;
  91         char * inode_bitmap = fs->inode_map->bitmap;
  92         int inode_blocks_per_group;
  93         int group_desc_blocks;
  94
  95         inode_blocks_per_group = ((fs->super->s_inodes_per_group *
  96                                    EXT2_INODE_SIZE(fs->super)) +
  97                                   EXT2_BLOCK_SIZE(fs->super) - 1) /
  98                                  EXT2_BLOCK_SIZE(fs->super);
  99         group_desc_blocks = ((fs->super->s_blocks_count -
 100                               fs->super->s_first_data_block +
 101                               EXT2_BLOCKS_PER_GROUP(fs->super) - 1) /
 102                              EXT2_BLOCKS_PER_GROUP(fs->super) +
 103                              EXT2_DESC_PER_BLOCK(fs->super) - 1) /
 104                             EXT2_DESC_PER_BLOCK(fs->super);
 105
 106         printf ("\n");
 107         group_blk = fs->super->s_first_data_block;
 108         for (i = 0; i < fs->group_desc_count; i++) {
 109                 next_blk = group_blk + fs->super->s_blocks_per_group;
 110                 if (next_blk > fs->super->s_blocks_count)
 111                         next_blk = fs->super->s_blocks_count;
 112                 printf (opt_hex ? _("Group %lu: (Blocks 0x%04x -- 0x%04x)\n"):
 113                          _("Group %lu: (Blocks %u -- %u)\n"), i,
 114                         group_blk, next_blk -1 );
 115                 if (ext2fs_bg_has_super (fs, i))
 116                         printf (opt_hex ? _("  %s Superblock at 0x%04x,"
 117                                 "  Group Descriptors at 0x%04x-0x%04x\n"):
 118                                 _("  %s Superblock at %u,"
 119                                 "  Group Descriptors at %u-%u\n"),
 120                                 i == 0 ? _("Primary") : _("Backup"),
 121                                 group_blk, group_blk + 1,
 122                                 group_blk + group_desc_blocks);
 123                 printf (opt_hex ? _("  Block bitmap at 0x%04x (+%d), "
 124                         "Inode bitmap at 0x%04x (+%d)\n  "
 125                         "Inode table at 0x%04x-0x%04x (+%d)\n"):
 126                         _("  Block bitmap at %u (+%d), "
 127                         "Inode bitmap at %u (+%d)\n  "
 128                         "Inode table at %u-%u (+%d)\n"),
 129                         fs->group_desc[i].bg_block_bitmap,
 130                         fs->group_desc[i].bg_block_bitmap - group_blk,
 131                         fs->group_desc[i].bg_inode_bitmap,
 132                         fs->group_desc[i].bg_inode_bitmap - group_blk,
 133                         fs->group_desc[i].bg_inode_table,
 134                         fs->group_desc[i].bg_inode_table +
 135                                 inode_blocks_per_group - 1,
 136                         fs->group_desc[i].bg_inode_table - group_blk);
 137                 printf (_("  %d free blocks, %d free inodes, %d directories\n"),
 138                         fs->group_desc[i].bg_free_blocks_count,
 139                         fs->group_desc[i].bg_free_inodes_count,
 140                         fs->group_desc[i].bg_used_dirs_count);
 141                 printf (_("  Free blocks: "));
 142                 print_free (i, block_bitmap, fs->super->s_blocks_per_group,
 143                             fs->super->s_first_data_block);
 144                 block_bitmap += fs->super->s_blocks_per_group / 8;
 145                 printf ("\n");
 146                 printf (_("  Free inodes: "));
 147                 print_free (i, inode_bitmap, fs->super->s_inodes_per_group, 1);
 148                 inode_bitmap += fs->super->s_inodes_per_group / 8;
 149                 printf ("\n");
 150                 group_blk = next_blk;
 151         }
 152 }
 153
 154 static void list_bad_blocks(ext2_filsys fs)
 155 {
 156         badblocks_list          bb_list = 0;
 157         badblocks_iterate       bb_iter;
 158         blk_t                   blk;
 159         errcode_t               retval;
 160
 161         retval = ext2fs_read_bb_inode(fs, &bb_list);
 162         if (retval) {
 163                 com_err("ext2fs_read_bb_inode", retval, "");
 164                 exit(1);
 165         }
 166         retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
 167         if (retval) {
 168                 com_err("ext2fs_badblocks_list_iterate_begin", retval,
 169                         _("while printing bad block list"));
 170                 exit(1);
 171         }
 172         if (ext2fs_badblocks_list_iterate(bb_iter, &blk))
 173                 printf(_("Bad blocks: %d"), blk);
 174         while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
 175                 printf(", %d", blk);
 176         ext2fs_badblocks_list_iterate_end(bb_iter);
 177         printf("\n");
 178 }
 179
 180 static void dump_bad_blocks(ext2_filsys fs)
 181 {
 182         badblocks_list          bb_list = 0;
 183         badblocks_iterate       bb_iter;
 184         blk_t                   blk;
 185         errcode_t               retval;
 186
 187         retval = ext2fs_read_bb_inode(fs, &bb_list);
 188         if (retval) {
 189                 com_err("ext2fs_read_bb_inode", retval, "");
 190                 exit(1);
 191         }
 192         retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
 193         if (retval) {
 194                 com_err("ext2fs_badblocks_list_iterate_begin", retval,
 195                         _("while printing bad block list"));
 196                 exit(1);
 197         }
 198         while (ext2fs_badblocks_list_iterate(bb_iter, &blk))
 199                 printf("%d\n", blk);
 200         ext2fs_badblocks_list_iterate_end(bb_iter);
 201 }
 202
 203 static void print_journal_information(ext2_filsys fs)
 204 {
 205         errcode_t       retval;
 206         char            buf[1024];
 207         char            str[80];
 208         int             i;
 209         journal_superblock_t    *jsb;
 210
 211         /* Get the journal superblock */
 212         if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
 213                 com_err(program_name, retval,
 214                         _("while reading journal superblock"));
 215                 exit(1);
 216         }
 217         jsb = (journal_superblock_t *) buf;
 218         if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
 219             (jsb->s_header.h_blocktype !=
 220              (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
 221                 com_err(program_name, 0,
 222                         _("Couldn't find journal superblock magic numbers"));
 223                 exit(1);
 224         }
 225
 226         fputs("\n", stdout);
 227         printf("Journal block size:       %d\n", ntohl(jsb->s_blocksize));
 228         printf("Journal length:           %d\n", ntohl(jsb->s_maxlen));
 229         printf("Journal first block:      %d\n", ntohl(jsb->s_first));
 230         printf("Journal sequence:         0x%08x\n", ntohl(jsb->s_sequence));
 231         printf("Journal start:            %d\n", ntohl(jsb->s_start));
 232         printf("Journal number of users:  %d\n", ntohl(jsb->s_nr_users));
 233         for (i=0; i < ntohl(jsb->s_nr_users); i++) {
 234                 if (i)
 235                         printf("                          ");
 236                 else
 237                         printf("Journal users:            ");
 238                 uuid_unparse(&jsb->s_users[i*16], str);
 239                 printf("%s\n", str);
 240         }
 241 }
 242
 243 int main (int argc, char ** argv)
 244 {
 245         errcode_t       retval;
 246         ext2_filsys     fs;
 247         int             print_badblocks = 0;
 248         int             use_superblock = 0;
 249         int             use_blocksize = 0;
 250         int             image_dump = 0;
 251         int             force = 0;
 252         int             flags;
 253         int             header_only = 0;
 254         int             big_endian;
 255         int             c;
 256
 257 #ifdef ENABLE_NLS
 258         setlocale(LC_MESSAGES, "");
 259         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 260         textdomain(NLS_CAT_NAME);
 261 #endif
 262         initialize_ext2_error_table();
 263         fprintf (stderr, _("dumpe2fs %s, %s for EXT2 FS %s, %s\n"),
 264                  E2FSPROGS_VERSION, E2FSPROGS_DATE,
 265                  EXT2FS_VERSION, EXT2FS_DATE);
 266         if (argc && *argv)
 267                 program_name = *argv;
 268
 269         while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
 270                 switch (c) {
 271                 case 'b':
 272                         print_badblocks++;
 273                         break;
 274                 case 'f':
 275                         force++;
 276                         break;
 277                 case 'h':
 278                         header_only++;
 279                         break;
 280                 case 'i':
 281                         image_dump++;
 282                         break;
 283                 case 'o':
 284                         if (optarg[0] == 'b')
 285                                 use_superblock = atoi(optarg+1);
 286                         else if (optarg[0] == 'B')
 287                                 use_blocksize = atoi(optarg+1);
 288                         else
 289                                 usage();
 290                         break;
 291                 case 'V':
 292                         /* Print version number and exit */
 293                         fprintf(stderr, _("\tUsing %s\n"),
 294                                 error_message(EXT2_ET_BASE));
 295                         exit(0);
 296                 case 'x':
 297                         opt_hex=1;
 298                         break;
 299                 default:
 300                         usage();
 301                 }
 302         }
 303         if (optind > argc - 1)
 304                 usage();
 305         device_name = argv[optind++];
 306         if (use_superblock && !use_blocksize)
 307                 use_blocksize = 1024;
 308         flags = EXT2_FLAG_JOURNAL_DEV_OK;
 309         if (force)
 310                 flags |= EXT2_FLAG_FORCE;
 311         if (image_dump)
 312                 flags |= EXT2_FLAG_IMAGE_FILE;
 313
 314         retval = ext2fs_open (device_name, flags, use_superblock,
 315                               use_blocksize, unix_io_manager, &fs);
 316         if (retval) {
 317                 com_err (program_name, retval, _("while trying to open %s"),
 318                          device_name);
 319                 printf (_("Couldn't find valid filesystem superblock.\n"));
 320                 exit (1);
 321         }
 322         if (print_badblocks) {
 323                 dump_bad_blocks(fs);
 324         } else {
 325                 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
 326 #ifdef WORDS_BIGENDIAN
 327                 big_endian = !big_endian;
 328 #endif
 329                 if (big_endian)
 330                         printf(_("Note: This is a byte-swapped filesystem\n"));
 331                 list_super (fs->super);
 332                 if (fs->super->s_feature_incompat &
 333                       EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
 334                         print_journal_information(fs);
 335                         ext2fs_close(fs);
 336                         exit(0);
 337                 }
 338                 list_bad_blocks (fs);
 339                 if (header_only) {
 340                         ext2fs_close (fs);
 341                         exit (0);
 342                 }
 343                 retval = ext2fs_read_bitmaps (fs);
 344                 if (retval) {
 345                         com_err (program_name, retval,
 346                                  _("while trying to read the bitmaps"),
 347                                  device_name);
 348                         ext2fs_close (fs);
 349                         exit (1);
 350                 }
 351                 list_desc (fs);
 352         }
 353         ext2fs_close (fs);
 354         exit (0);
 355 }