2 * dumpe2fs.c - List the control structures of a second
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)
9 * Copyright 1995, 1996, 1997 by Theodore Ts'o.
12 * This file may be redistributed under the terms of the GNU Public
20 * 94/02/27 - Ported to use the ext2fs library
35 #include "ext2fs/ext2_fs.h"
37 #include "ext2fs/ext2fs.h"
40 #include <uuid/uuid.h>
42 #include "../version.h"
43 #include "nls-enable.h"
45 #define in_use(m, x) (ext2fs_test_bit ((x), (m)))
47 const char * program_name = "dumpe2fs";
48 char * device_name = NULL;
49 const char *num_format = "%lu";
50 char range_format[16];
52 static void usage(void)
54 fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
55 "[-oB blocksize] device\n"), program_name);
59 static void print_number (unsigned long num)
61 printf(num_format, num);
64 static void print_free (unsigned long group, char * bitmap,
65 unsigned long nbytes, unsigned long offset)
71 offset += group * nbytes;
72 for (i = 0; i < nbytes; i++)
73 if (!in_use (bitmap, i))
77 print_number(i + offset);
78 for (j = i; j < nbytes && !in_use (bitmap, j); j++)
82 print_number(j + offset);
89 static void list_desc (ext2_filsys fs)
93 blk_t group_blk, next_blk;
94 blk_t super_blk, old_desc_blk, new_desc_blk;
95 char *block_bitmap=NULL, *inode_bitmap=NULL;
96 int inode_blocks_per_group, old_desc_blocks;
100 block_bitmap = fs->block_map->bitmap;
102 inode_bitmap = fs->inode_map->bitmap;
104 inode_blocks_per_group = ((fs->super->s_inodes_per_group *
105 EXT2_INODE_SIZE(fs->super)) +
106 EXT2_BLOCK_SIZE(fs->super) - 1) /
107 EXT2_BLOCK_SIZE(fs->super);
109 group_blk = fs->super->s_first_data_block;
110 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
111 old_desc_blocks = fs->super->s_first_meta_bg;
113 old_desc_blocks = fs->desc_blocks;
114 for (i = 0; i < fs->group_desc_count; i++) {
115 ext2fs_super_and_bgd_loc(fs, i, &super_blk,
116 &old_desc_blk, &new_desc_blk, 0);
117 next_blk = group_blk + fs->super->s_blocks_per_group;
118 if (next_blk > fs->super->s_blocks_count)
119 next_blk = fs->super->s_blocks_count;
120 printf (_("Group %lu: (Blocks "), i);
121 printf(range_format, group_blk, next_blk - 1);
122 fputs(")\n", stdout);
123 has_super = ((i==0) || super_blk);
125 printf (_(" %s superblock at "),
126 i == 0 ? _("Primary") : _("Backup"));
127 print_number(super_blk);
130 printf(_(", Group descriptors at "));
131 printf(range_format, old_desc_blk,
132 old_desc_blk + old_desc_blocks - 1);
133 } else if (new_desc_blk) {
134 fputc(has_super ? ',' : ' ', stdout);
135 printf(_(" Group descriptor at "));
136 print_number(new_desc_blk);
141 fputs(_(" Block bitmap at "), stdout);
142 print_number(fs->group_desc[i].bg_block_bitmap);
143 diff = fs->group_desc[i].bg_block_bitmap - group_blk;
145 printf(" (+%ld)", diff);
146 fputs(_(", Inode bitmap at "), stdout);
147 print_number(fs->group_desc[i].bg_inode_bitmap);
148 diff = fs->group_desc[i].bg_inode_bitmap - group_blk;
150 printf(" (+%ld)", diff);
151 fputs(_("\n Inode table at "), stdout);
152 printf(range_format, fs->group_desc[i].bg_inode_table,
153 fs->group_desc[i].bg_inode_table +
154 inode_blocks_per_group - 1);
155 diff = fs->group_desc[i].bg_inode_table - group_blk;
157 printf(" (+%ld)", diff);
158 printf (_("\n %d free blocks, %d free inodes, "
160 fs->group_desc[i].bg_free_blocks_count,
161 fs->group_desc[i].bg_free_inodes_count,
162 fs->group_desc[i].bg_used_dirs_count);
164 fputs(_(" Free blocks: "), stdout);
165 print_free (i, block_bitmap,
166 fs->super->s_blocks_per_group,
167 fs->super->s_first_data_block);
169 block_bitmap += fs->super->s_blocks_per_group / 8;
172 fputs(_(" Free inodes: "), stdout);
173 print_free (i, inode_bitmap,
174 fs->super->s_inodes_per_group, 1);
176 inode_bitmap += fs->super->s_inodes_per_group / 8;
178 group_blk = next_blk;
182 static void list_bad_blocks(ext2_filsys fs, int dump)
184 badblocks_list bb_list = 0;
185 badblocks_iterate bb_iter;
188 const char *header, *fmt;
190 retval = ext2fs_read_bb_inode(fs, &bb_list);
192 com_err("ext2fs_read_bb_inode", retval, "");
195 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
197 com_err("ext2fs_badblocks_list_iterate_begin", retval,
198 _("while printing bad block list"));
202 header = fmt = "%d\n";
204 header = _("Bad blocks: %d");
207 while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
208 printf(header ? header : fmt, blk);
211 ext2fs_badblocks_list_iterate_end(bb_iter);
216 static void print_journal_information(ext2_filsys fs)
222 journal_superblock_t *jsb;
224 /* Get the journal superblock */
225 if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
226 com_err(program_name, retval,
227 _("while reading journal superblock"));
230 jsb = (journal_superblock_t *) buf;
231 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
232 (jsb->s_header.h_blocktype !=
233 (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
234 com_err(program_name, 0,
235 _("Couldn't find journal superblock magic numbers"));
239 printf(_("\nJournal block size: %d\n"
240 "Journal length: %d\n"
241 "Journal first block: %d\n"
242 "Journal sequence: 0x%08x\n"
243 "Journal start: %d\n"
244 "Journal number of users: %d\n"),
245 ntohl(jsb->s_blocksize), ntohl(jsb->s_maxlen),
246 ntohl(jsb->s_first), ntohl(jsb->s_sequence),
247 ntohl(jsb->s_start), ntohl(jsb->s_nr_users));
249 for (i=0; i < ntohl(jsb->s_nr_users); i++) {
250 uuid_unparse(&jsb->s_users[i*16], str);
252 : "Journal users: %s\n",
257 int main (int argc, char ** argv)
261 int print_badblocks = 0;
262 int use_superblock = 0;
263 int use_blocksize = 0;
272 setlocale(LC_MESSAGES, "");
273 setlocale(LC_CTYPE, "");
274 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
275 textdomain(NLS_CAT_NAME);
277 initialize_ext2_error_table();
278 fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
281 program_name = *argv;
283 while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
298 if (optarg[0] == 'b')
299 use_superblock = atoi(optarg+1);
300 else if (optarg[0] == 'B')
301 use_blocksize = atoi(optarg+1);
306 /* Print version number and exit */
307 fprintf(stderr, _("\tUsing %s\n"),
308 error_message(EXT2_ET_BASE));
311 num_format = "0x%04x";
317 if (optind > argc - 1)
319 sprintf(range_format, "%s-%s", num_format, num_format);
320 device_name = argv[optind++];
321 if (use_superblock && !use_blocksize)
322 use_blocksize = 1024;
323 flags = EXT2_FLAG_JOURNAL_DEV_OK;
325 flags |= EXT2_FLAG_FORCE;
327 flags |= EXT2_FLAG_IMAGE_FILE;
329 retval = ext2fs_open (device_name, flags, use_superblock,
330 use_blocksize, unix_io_manager, &fs);
332 com_err (program_name, retval, _("while trying to open %s"),
334 printf (_("Couldn't find valid filesystem superblock.\n"));
337 if (print_badblocks) {
338 list_bad_blocks(fs, 1);
340 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
341 #ifdef WORDS_BIGENDIAN
342 big_endian = !big_endian;
345 printf(_("Note: This is a byte-swapped filesystem\n"));
346 list_super (fs->super);
347 if (fs->super->s_feature_incompat &
348 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
349 print_journal_information(fs);
353 list_bad_blocks(fs, 0);
358 retval = ext2fs_read_bitmaps (fs);
361 printf(_("\n%s: %s: error reading bitmaps: %s\n"),
362 program_name, device_name,
363 error_message(retval));