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;
51 static void usage(void)
53 fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
54 "[-oB blocksize] device\n"), program_name);
58 static void print_number(unsigned long num)
61 printf("0x%04lx", num);
66 static void print_range(unsigned long a, unsigned long b)
69 printf("0x%04lx-0x%04lx", a, b);
71 printf("%lu-%lu", a, b);
74 static void print_free (unsigned long group, char * bitmap,
75 unsigned long nbytes, unsigned long offset)
81 offset += group * nbytes;
82 for (i = 0; i < nbytes; i++)
83 if (!in_use (bitmap, i))
87 print_number(i + offset);
88 for (j = i; j < nbytes && !in_use (bitmap, j); j++)
92 print_number(j + offset);
99 static void list_desc (ext2_filsys fs)
103 blk_t group_blk, next_blk;
104 blk_t super_blk, old_desc_blk, new_desc_blk;
105 char *block_bitmap=NULL, *inode_bitmap=NULL;
106 int inode_blocks_per_group, old_desc_blocks, reserved_gdt;
110 block_bitmap = fs->block_map->bitmap;
112 inode_bitmap = fs->inode_map->bitmap;
114 inode_blocks_per_group = ((fs->super->s_inodes_per_group *
115 EXT2_INODE_SIZE(fs->super)) +
116 EXT2_BLOCK_SIZE(fs->super) - 1) /
117 EXT2_BLOCK_SIZE(fs->super);
118 reserved_gdt = fs->super->s_reserved_gdt_blocks;
120 group_blk = fs->super->s_first_data_block;
121 if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
122 old_desc_blocks = fs->super->s_first_meta_bg;
124 old_desc_blocks = fs->desc_blocks;
125 for (i = 0; i < fs->group_desc_count; i++) {
126 ext2fs_super_and_bgd_loc(fs, i, &super_blk,
127 &old_desc_blk, &new_desc_blk, 0);
128 next_blk = group_blk + fs->super->s_blocks_per_group;
129 if (next_blk > fs->super->s_blocks_count)
130 next_blk = fs->super->s_blocks_count;
131 printf (_("Group %lu: (Blocks "), i);
132 print_range(group_blk, next_blk - 1);
133 fputs(")\n", stdout);
134 has_super = ((i==0) || super_blk);
136 printf (_(" %s superblock at "),
137 i == 0 ? _("Primary") : _("Backup"));
138 print_number(super_blk);
141 printf(_(", Group descriptors at "));
142 print_range(old_desc_blk,
143 old_desc_blk + old_desc_blocks - 1);
145 printf(_("\n Reserved GDT blocks at "));
146 print_range(old_desc_blk + old_desc_blocks,
147 old_desc_blk + old_desc_blocks +
150 } else if (new_desc_blk) {
151 fputc(has_super ? ',' : ' ', stdout);
152 printf(_(" Group descriptor at "));
153 print_number(new_desc_blk);
158 fputs(_(" Block bitmap at "), stdout);
159 print_number(fs->group_desc[i].bg_block_bitmap);
160 diff = fs->group_desc[i].bg_block_bitmap - group_blk;
162 printf(" (+%ld)", diff);
163 fputs(_(", Inode bitmap at "), stdout);
164 print_number(fs->group_desc[i].bg_inode_bitmap);
165 diff = fs->group_desc[i].bg_inode_bitmap - group_blk;
167 printf(" (+%ld)", diff);
168 fputs(_("\n Inode table at "), stdout);
169 print_range(fs->group_desc[i].bg_inode_table,
170 fs->group_desc[i].bg_inode_table +
171 inode_blocks_per_group - 1);
172 diff = fs->group_desc[i].bg_inode_table - group_blk;
174 printf(" (+%ld)", diff);
175 printf (_("\n %d free blocks, %d free inodes, "
177 fs->group_desc[i].bg_free_blocks_count,
178 fs->group_desc[i].bg_free_inodes_count,
179 fs->group_desc[i].bg_used_dirs_count);
181 fputs(_(" Free blocks: "), stdout);
182 print_free (i, block_bitmap,
183 fs->super->s_blocks_per_group,
184 fs->super->s_first_data_block);
186 block_bitmap += fs->super->s_blocks_per_group / 8;
189 fputs(_(" Free inodes: "), stdout);
190 print_free (i, inode_bitmap,
191 fs->super->s_inodes_per_group, 1);
193 inode_bitmap += fs->super->s_inodes_per_group / 8;
195 group_blk = next_blk;
199 static void list_bad_blocks(ext2_filsys fs, int dump)
201 badblocks_list bb_list = 0;
202 badblocks_iterate bb_iter;
205 const char *header, *fmt;
207 retval = ext2fs_read_bb_inode(fs, &bb_list);
209 com_err("ext2fs_read_bb_inode", retval, 0);
212 retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
214 com_err("ext2fs_badblocks_list_iterate_begin", retval,
215 _("while printing bad block list"));
219 header = fmt = "%d\n";
221 header = _("Bad blocks: %d");
224 while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
225 printf(header ? header : fmt, blk);
228 ext2fs_badblocks_list_iterate_end(bb_iter);
233 static void print_journal_information(ext2_filsys fs)
239 journal_superblock_t *jsb;
241 /* Get the journal superblock */
242 if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
243 com_err(program_name, retval,
244 _("while reading journal superblock"));
247 jsb = (journal_superblock_t *) buf;
248 if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
249 (jsb->s_header.h_blocktype !=
250 (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
251 com_err(program_name, 0,
252 _("Couldn't find journal superblock magic numbers"));
256 printf(_("\nJournal block size: %u\n"
257 "Journal length: %u\n"
258 "Journal first block: %u\n"
259 "Journal sequence: 0x%08x\n"
260 "Journal start: %u\n"
261 "Journal number of users: %lu\n"),
262 ntohl(jsb->s_blocksize), ntohl(jsb->s_maxlen),
263 ntohl(jsb->s_first), ntohl(jsb->s_sequence),
264 ntohl(jsb->s_start), ntohl(jsb->s_nr_users));
266 for (i=0; i < ntohl(jsb->s_nr_users); i++) {
267 uuid_unparse(&jsb->s_users[i*16], str);
269 : _("Journal users: %s\n"),
274 int main (int argc, char ** argv)
278 int print_badblocks = 0;
279 int use_superblock = 0;
280 int use_blocksize = 0;
289 setlocale(LC_MESSAGES, "");
290 setlocale(LC_CTYPE, "");
291 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
292 textdomain(NLS_CAT_NAME);
294 initialize_ext2_error_table();
295 fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
298 program_name = *argv;
300 while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
315 if (optarg[0] == 'b')
316 use_superblock = atoi(optarg+1);
317 else if (optarg[0] == 'B')
318 use_blocksize = atoi(optarg+1);
323 /* Print version number and exit */
324 fprintf(stderr, _("\tUsing %s\n"),
325 error_message(EXT2_ET_BASE));
334 if (optind > argc - 1)
336 device_name = argv[optind++];
337 if (use_superblock && !use_blocksize)
338 use_blocksize = 1024;
339 flags = EXT2_FLAG_JOURNAL_DEV_OK;
341 flags |= EXT2_FLAG_FORCE;
343 flags |= EXT2_FLAG_IMAGE_FILE;
345 retval = ext2fs_open (device_name, flags, use_superblock,
346 use_blocksize, unix_io_manager, &fs);
348 com_err (program_name, retval, _("while trying to open %s"),
350 printf (_("Couldn't find valid filesystem superblock.\n"));
353 if (print_badblocks) {
354 list_bad_blocks(fs, 1);
356 big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
357 #ifdef WORDS_BIGENDIAN
358 big_endian = !big_endian;
361 printf(_("Note: This is a byte-swapped filesystem\n"));
362 list_super (fs->super);
363 if (fs->super->s_feature_incompat &
364 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
365 print_journal_information(fs);
369 list_bad_blocks(fs, 0);
374 retval = ext2fs_read_bitmaps (fs);
377 printf(_("\n%s: %s: error reading bitmaps: %s\n"),
378 program_name, device_name,
379 error_message(retval));