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_free (unsigned long group, char * bitmap,
60 unsigned long nbytes, unsigned long offset)
66 offset += group * nbytes;
67 for (i = 0; i < nbytes; i++)
68 if (!in_use (bitmap, i))
72 printf (num_format, i + offset);
73 for (j = i; j < nbytes && !in_use (bitmap, j); j++)
77 printf(num_format, j + offset);
84 static void list_desc (ext2_filsys fs)
88 blk_t group_blk, next_blk;
89 char * block_bitmap = fs->block_map->bitmap;
90 char * inode_bitmap = fs->inode_map->bitmap;
91 int inode_blocks_per_group;
92 int group_desc_blocks;
94 inode_blocks_per_group = ((fs->super->s_inodes_per_group *
95 EXT2_INODE_SIZE(fs->super)) +
96 EXT2_BLOCK_SIZE(fs->super) - 1) /
97 EXT2_BLOCK_SIZE(fs->super);
98 group_desc_blocks = ((fs->super->s_blocks_count -
99 fs->super->s_first_data_block +
100 EXT2_BLOCKS_PER_GROUP(fs->super) - 1) /
101 EXT2_BLOCKS_PER_GROUP(fs->super) +
102 EXT2_DESC_PER_BLOCK(fs->super) - 1) /
103 EXT2_DESC_PER_BLOCK(fs->super);
106 group_blk = fs->super->s_first_data_block;
107 for (i = 0; i < fs->group_desc_count; i++) {
108 next_blk = group_blk + fs->super->s_blocks_per_group;
109 if (next_blk > fs->super->s_blocks_count)
110 next_blk = fs->super->s_blocks_count;
111 printf (_("Group %lu: (Blocks "), i);
112 printf(range_format, group_blk, next_blk - 1);
113 fputs(")\n", stdout);
114 if (ext2fs_bg_has_super (fs, i)) {
115 printf (_(" %s Superblock at "),
116 i == 0 ? _("Primary") : _("Backup"));
117 printf(num_format, group_blk);
118 printf(_(", Group Descriptors at "));
119 printf(range_format, group_blk+1,
120 group_blk + group_desc_blocks);
123 fputs(_(" Block bitmap at "), stdout);
124 printf(num_format, fs->group_desc[i].bg_block_bitmap);
125 diff = fs->group_desc[i].bg_block_bitmap - group_blk;
127 printf(" (+%ld)", diff);
128 fputs(_(", Inode bitmap at "), stdout);
129 printf(num_format, fs->group_desc[i].bg_inode_bitmap);
130 diff = fs->group_desc[i].bg_inode_bitmap - group_blk;
132 printf(" (+%ld)", diff);
133 fputs(_("\n Inode table at "), stdout);
134 printf(range_format, fs->group_desc[i].bg_inode_table,
135 fs->group_desc[i].bg_inode_table +
136 inode_blocks_per_group - 1);
137 diff = fs->group_desc[i].bg_inode_table - group_blk;
139 printf(" (+%ld)", diff);
140 printf (_("\n %d free blocks, %d free inodes, "
141 "%d directories\n Free blocks: "),
142 fs->group_desc[i].bg_free_blocks_count,
143 fs->group_desc[i].bg_free_inodes_count,
144 fs->group_desc[i].bg_used_dirs_count);
145 print_free (i, block_bitmap, fs->super->s_blocks_per_group,
146 fs->super->s_first_data_block);
147 fputs(_("\n Free inodes: "), stdout);
148 print_free (i, inode_bitmap, fs->super->s_inodes_per_group, 1);
150 block_bitmap += fs->super->s_blocks_per_group / 8;
151 inode_bitmap += fs->super->s_inodes_per_group / 8;
152 group_blk = next_blk;
156 static void list_bad_blocks(ext2_filsys fs, int dump)
158 badblocks_list bb_list = 0;
159 badblocks_iterate bb_iter;
162 const char *header, *fmt;
164 retval = ext2fs_read_bb_inode(fs, &bb_list);
166 com_err("ext2fs_read_bb_inode", retval, "");
169 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
171 com_err("ext2fs_badblocks_list_iterate_begin", retval,
172 _("while printing bad block list"));
176 header = fmt = "%d\n";
178 header = _("Bad blocks: %d");
181 while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
182 printf(header ? header : fmt, blk);
185 ext2fs_badblocks_list_iterate_end(bb_iter);
190 static void print_journal_information(ext2_filsys fs)
196 journal_superblock_t *jsb;
198 /* Get the journal superblock */
199 if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
200 com_err(program_name, retval,
201 _("while reading journal superblock"));
204 jsb = (journal_superblock_t *) buf;
205 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
206 (jsb->s_header.h_blocktype !=
207 (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
208 com_err(program_name, 0,
209 _("Couldn't find journal superblock magic numbers"));
213 printf(_("\nJournal block size: %d\n"
214 "Journal length: %d\n"
215 "Journal first block: %d\n"
216 "Journal sequence: 0x%08x\n"
217 "Journal start: %d\n"
218 "Journal number of users: %d\n"),
219 ntohl(jsb->s_blocksize), ntohl(jsb->s_maxlen),
220 ntohl(jsb->s_first), ntohl(jsb->s_sequence),
221 ntohl(jsb->s_start), ntohl(jsb->s_nr_users));
223 for (i=0; i < ntohl(jsb->s_nr_users); i++) {
224 uuid_unparse(&jsb->s_users[i*16], str);
226 : "Journal users: %s\n",
231 int main (int argc, char ** argv)
235 int print_badblocks = 0;
236 int use_superblock = 0;
237 int use_blocksize = 0;
246 setlocale(LC_MESSAGES, "");
247 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
248 textdomain(NLS_CAT_NAME);
250 initialize_ext2_error_table();
251 fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
254 program_name = *argv;
256 while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
271 if (optarg[0] == 'b')
272 use_superblock = atoi(optarg+1);
273 else if (optarg[0] == 'B')
274 use_blocksize = atoi(optarg+1);
279 /* Print version number and exit */
280 fprintf(stderr, _("\tUsing %s\n"),
281 error_message(EXT2_ET_BASE));
284 num_format = "0x%04x";
290 if (optind > argc - 1)
292 sprintf(range_format, "%s-%s", num_format, num_format);
293 device_name = argv[optind++];
294 if (use_superblock && !use_blocksize)
295 use_blocksize = 1024;
296 flags = EXT2_FLAG_JOURNAL_DEV_OK;
298 flags |= EXT2_FLAG_FORCE;
300 flags |= EXT2_FLAG_IMAGE_FILE;
302 retval = ext2fs_open (device_name, flags, use_superblock,
303 use_blocksize, unix_io_manager, &fs);
305 com_err (program_name, retval, _("while trying to open %s"),
307 printf (_("Couldn't find valid filesystem superblock.\n"));
310 if (print_badblocks) {
311 list_bad_blocks(fs, 1);
313 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
314 #ifdef WORDS_BIGENDIAN
315 big_endian = !big_endian;
318 printf(_("Note: This is a byte-swapped filesystem\n"));
319 list_super (fs->super);
320 if (fs->super->s_feature_incompat &
321 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
322 print_journal_information(fs);
326 list_bad_blocks(fs, 0);
331 retval = ext2fs_read_bitmaps (fs);
333 com_err (program_name, retval,
334 _("while trying to read the bitmaps"),