blob: b71900e76f1b0eed66d9f9d69b322abdaeed17b9 [file] [log] [blame]
/*
* dumpe2fs.c - List the control structures of a second
* extended filesystem
*
* Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
* Laboratoire MASI, Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* Copyright 1995, 1996, 1997 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
/*
* History:
* 94/01/09 - Creation
* 94/02/27 - Ported to use the ext2fs library
*/
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <linux/ext2_fs.h>
#include "ext2fs/ext2fs.h"
#include "e2p/e2p.h"
#include "../version.h"
#define in_use(m, x) (ext2fs_test_bit ((x), (m)))
const char * program_name = "dumpe2fs";
char * device_name = NULL;
static volatile void usage (void)
{
fprintf (stderr, "usage: %s [-bV] device\n", program_name);
exit (1);
}
static void print_free (unsigned long group, char * bitmap,
unsigned long nbytes, unsigned long offset)
{
int p = 0;
unsigned long i;
unsigned long j;
for (i = 0; i < nbytes; i++)
if (!in_use (bitmap, i))
{
if (p)
printf (", ");
if (i == nbytes - 1 || in_use (bitmap, i + 1))
printf ("%lu", group * nbytes + i + offset);
else
{
for (j = i; j < nbytes && !in_use (bitmap, j);
j++)
;
printf ("%lu-%lu", group * nbytes + i + offset,
group * nbytes + (j - 1) + offset);
i = j - 1;
}
p = 1;
}
}
static void list_desc (ext2_filsys fs)
{
unsigned long i;
blk_t group_blk, next_blk;
char * block_bitmap = fs->block_map->bitmap;
char * inode_bitmap = fs->inode_map->bitmap;
printf ("\n");
group_blk = fs->super->s_first_data_block;
for (i = 0; i < fs->group_desc_count; i++) {
next_blk = group_blk + fs->super->s_blocks_per_group;
if (next_blk > fs->super->s_blocks_count)
next_blk = fs->super->s_blocks_count;
printf ("Group %lu: (Blocks %u -- %u)\n", i,
group_blk, next_blk -1 );
printf (" Block bitmap at %u (+%d), "
"Inode bitmap at %u (+%d)\n "
"Inode table at %u (+%d)\n",
fs->group_desc[i].bg_block_bitmap,
fs->group_desc[i].bg_block_bitmap - group_blk,
fs->group_desc[i].bg_inode_bitmap,
fs->group_desc[i].bg_inode_bitmap - group_blk,
fs->group_desc[i].bg_inode_table,
fs->group_desc[i].bg_inode_table - group_blk);
printf (" %d free blocks, %d free inodes, %d directories\n",
fs->group_desc[i].bg_free_blocks_count,
fs->group_desc[i].bg_free_inodes_count,
fs->group_desc[i].bg_used_dirs_count);
printf (" Free blocks: ");
print_free (i, block_bitmap, fs->super->s_blocks_per_group,
fs->super->s_first_data_block);
block_bitmap += fs->super->s_blocks_per_group / 8;
printf ("\n");
printf (" Free inodes: ");
print_free (i, inode_bitmap, fs->super->s_inodes_per_group, 1);
inode_bitmap += fs->super->s_inodes_per_group / 8;
printf ("\n");
group_blk = next_blk;
}
}
static void list_bad_blocks(ext2_filsys fs)
{
badblocks_list bb_list = 0;
badblocks_iterate bb_iter;
blk_t blk;
errcode_t retval;
retval = ext2fs_read_bb_inode(fs, &bb_list);
if (retval) {
com_err("ext2fs_read_bb_inode", retval, "");
exit(1);
}
retval = badblocks_list_iterate_begin(bb_list, &bb_iter);
if (retval) {
com_err("badblocks_list_iterate_begin", retval,
"while printing bad block list");
exit(1);
}
if (badblocks_list_iterate(bb_iter, &blk))
printf("Bad blocks: %d", blk);
while (badblocks_list_iterate(bb_iter, &blk))
printf(", %d", blk);
badblocks_list_iterate_end(bb_iter);
printf("\n");
}
static void dump_bad_blocks(ext2_filsys fs)
{
badblocks_list bb_list = 0;
badblocks_iterate bb_iter;
blk_t blk;
errcode_t retval;
retval = ext2fs_read_bb_inode(fs, &bb_list);
if (retval) {
com_err("ext2fs_read_bb_inode", retval, "");
exit(1);
}
retval = badblocks_list_iterate_begin(bb_list, &bb_iter);
if (retval) {
com_err("badblocks_list_iterate_begin", retval,
"while printing bad block list");
exit(1);
}
while (badblocks_list_iterate(bb_iter, &blk))
printf("%d\n", blk);
badblocks_list_iterate_end(bb_iter);
}
static int i386_byteorder(void)
{
int one = 1;
char *cp = (char *) &one;
return (*cp == 1);
}
void main (int argc, char ** argv)
{
errcode_t retval;
ext2_filsys fs;
int print_badblocks = 0;
int big_endian;
char c;
initialize_ext2_error_table();
fprintf (stderr, "dumpe2fs %s, %s for EXT2 FS %s, %s\n",
E2FSPROGS_VERSION, E2FSPROGS_DATE,
EXT2FS_VERSION, EXT2FS_DATE);
if (argc && *argv)
program_name = *argv;
while ((c = getopt (argc, argv, "bV")) != EOF) {
switch (c) {
case 'b':
print_badblocks++;
break;
case 'V':
/* Print version number and exit */
fprintf(stderr, "\tUsing %s\n",
error_message(EXT2_ET_BASE));
exit(0);
default:
usage ();
}
}
if (optind > argc - 1)
usage ();
device_name = argv[optind++];
retval = ext2fs_open (device_name, 0, 0, 0, unix_io_manager, &fs);
if (retval) {
com_err (program_name, retval, "while trying to open %s",
device_name);
printf ("Couldn't find valid filesystem superblock.\n");
exit (1);
}
if (print_badblocks) {
dump_bad_blocks(fs);
} else {
retval = ext2fs_read_bitmaps (fs);
if (retval) {
com_err (program_name, retval,
"while trying to read the bitmaps",
device_name);
ext2fs_close (fs);
exit (1);
}
big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
if (!i386_byteorder())
big_endian = !big_endian;
if (big_endian)
printf("Note: This is a byte-swapped filesystem\n");
list_super (fs->super);
list_bad_blocks (fs);
list_desc (fs);
}
ext2fs_close (fs);
exit (0);
}