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https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
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377 lines
9.5 KiB
C
377 lines
9.5 KiB
C
/*
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* dumpe2fs.c - List the control structures of a second
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* extended filesystem
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*
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* Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr>
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* Laboratoire MASI, Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* Copyright 1995, 1996, 1997 by Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*/
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/*
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* History:
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* 94/01/09 - Creation
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* 94/02/27 - Ported to use the ext2fs library
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*/
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#else
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extern char *optarg;
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extern int optind;
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#endif
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "ext2fs/ext2_fs.h"
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#include "ext2fs/ext2fs.h"
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#include "e2p/e2p.h"
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#include "jfs_user.h"
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#include <uuid/uuid.h>
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#include "../version.h"
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#include "nls-enable.h"
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#define in_use(m, x) (ext2fs_test_bit ((x), (m)))
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const char * program_name = "dumpe2fs";
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char * device_name = NULL;
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const char *num_format = "%lu";
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char range_format[16];
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static void usage(void)
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{
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fprintf (stderr, _("Usage: %s [-bfhixV] [-ob superblock] "
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"[-oB blocksize] device\n"), program_name);
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exit (1);
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}
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static void print_number (unsigned long num)
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{
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printf(num_format, num);
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}
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static void print_free (unsigned long group, char * bitmap,
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unsigned long nbytes, unsigned long offset)
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{
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int p = 0;
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unsigned long i;
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unsigned long j;
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offset += group * nbytes;
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for (i = 0; i < nbytes; i++)
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if (!in_use (bitmap, i))
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{
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if (p)
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printf (", ");
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print_number(i + offset);
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for (j = i; j < nbytes && !in_use (bitmap, j); j++)
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;
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if (--j != i) {
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fputc('-', stdout);
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print_number(j + offset);
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i = j;
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}
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p = 1;
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}
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}
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static void list_desc (ext2_filsys fs)
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{
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unsigned long i;
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long diff;
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blk_t group_blk, next_blk;
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blk_t super_blk, old_desc_blk, new_desc_blk;
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char *block_bitmap=NULL, *inode_bitmap=NULL;
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int inode_blocks_per_group, old_desc_blocks, reserved_gdt;
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int has_super;
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if (fs->block_map)
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block_bitmap = fs->block_map->bitmap;
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if (fs->inode_map)
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inode_bitmap = fs->inode_map->bitmap;
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inode_blocks_per_group = ((fs->super->s_inodes_per_group *
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EXT2_INODE_SIZE(fs->super)) +
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EXT2_BLOCK_SIZE(fs->super) - 1) /
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EXT2_BLOCK_SIZE(fs->super);
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reserved_gdt = fs->super->s_reserved_gdt_blocks;
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fputc('\n', stdout);
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group_blk = fs->super->s_first_data_block;
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if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
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old_desc_blocks = fs->super->s_first_meta_bg;
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else
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old_desc_blocks = fs->desc_blocks;
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for (i = 0; i < fs->group_desc_count; i++) {
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ext2fs_super_and_bgd_loc(fs, i, &super_blk,
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&old_desc_blk, &new_desc_blk, 0);
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next_blk = group_blk + fs->super->s_blocks_per_group;
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if (next_blk > fs->super->s_blocks_count)
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next_blk = fs->super->s_blocks_count;
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printf (_("Group %lu: (Blocks "), i);
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printf(range_format, group_blk, next_blk - 1);
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fputs(")\n", stdout);
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has_super = ((i==0) || super_blk);
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if (has_super) {
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printf (_(" %s superblock at "),
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i == 0 ? _("Primary") : _("Backup"));
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print_number(super_blk);
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}
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if (old_desc_blk) {
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printf(_(", Group descriptors at "));
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printf(range_format, old_desc_blk,
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old_desc_blk + old_desc_blocks - 1);
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if (reserved_gdt) {
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printf(_("\n Reserved GDT blocks at "));
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printf(range_format,
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old_desc_blk + old_desc_blocks,
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old_desc_blk + old_desc_blocks +
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reserved_gdt - 1);
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}
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} else if (new_desc_blk) {
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fputc(has_super ? ',' : ' ', stdout);
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printf(_(" Group descriptor at "));
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print_number(new_desc_blk);
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has_super++;
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}
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if (has_super)
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fputc('\n', stdout);
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fputs(_(" Block bitmap at "), stdout);
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print_number(fs->group_desc[i].bg_block_bitmap);
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diff = fs->group_desc[i].bg_block_bitmap - group_blk;
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if (diff >= 0)
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printf(" (+%ld)", diff);
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fputs(_(", Inode bitmap at "), stdout);
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print_number(fs->group_desc[i].bg_inode_bitmap);
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diff = fs->group_desc[i].bg_inode_bitmap - group_blk;
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if (diff >= 0)
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printf(" (+%ld)", diff);
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fputs(_("\n Inode table at "), stdout);
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printf(range_format, fs->group_desc[i].bg_inode_table,
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fs->group_desc[i].bg_inode_table +
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inode_blocks_per_group - 1);
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diff = fs->group_desc[i].bg_inode_table - group_blk;
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if (diff > 0)
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printf(" (+%ld)", diff);
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printf (_("\n %d free blocks, %d free inodes, "
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"%d directories\n"),
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fs->group_desc[i].bg_free_blocks_count,
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fs->group_desc[i].bg_free_inodes_count,
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fs->group_desc[i].bg_used_dirs_count);
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if (block_bitmap) {
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fputs(_(" Free blocks: "), stdout);
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print_free (i, block_bitmap,
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fs->super->s_blocks_per_group,
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fs->super->s_first_data_block);
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fputc('\n', stdout);
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block_bitmap += fs->super->s_blocks_per_group / 8;
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}
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if (inode_bitmap) {
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fputs(_(" Free inodes: "), stdout);
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print_free (i, inode_bitmap,
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fs->super->s_inodes_per_group, 1);
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fputc('\n', stdout);
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inode_bitmap += fs->super->s_inodes_per_group / 8;
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}
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group_blk = next_blk;
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}
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}
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static void list_bad_blocks(ext2_filsys fs, int dump)
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{
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badblocks_list bb_list = 0;
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badblocks_iterate bb_iter;
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blk_t blk;
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errcode_t retval;
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const char *header, *fmt;
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retval = ext2fs_read_bb_inode(fs, &bb_list);
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if (retval) {
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com_err("ext2fs_read_bb_inode", retval, "");
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return;
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}
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retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
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if (retval) {
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com_err("ext2fs_badblocks_list_iterate_begin", retval,
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_("while printing bad block list"));
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return;
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}
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if (dump) {
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header = fmt = "%d\n";
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} else {
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header = _("Bad blocks: %d");
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fmt = ", %d";
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}
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while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
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printf(header ? header : fmt, blk);
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header = 0;
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}
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ext2fs_badblocks_list_iterate_end(bb_iter);
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if (!dump)
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fputc('\n', stdout);
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}
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static void print_journal_information(ext2_filsys fs)
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{
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errcode_t retval;
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char buf[1024];
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char str[80];
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unsigned int i;
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journal_superblock_t *jsb;
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/* Get the journal superblock */
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if ((retval = io_channel_read_blk(fs->io, fs->super->s_first_data_block+1, -1024, buf))) {
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com_err(program_name, retval,
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_("while reading journal superblock"));
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exit(1);
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}
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jsb = (journal_superblock_t *) buf;
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if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
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(jsb->s_header.h_blocktype !=
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(unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
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com_err(program_name, 0,
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_("Couldn't find journal superblock magic numbers"));
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exit(1);
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}
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printf(_("\nJournal block size: %d\n"
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"Journal length: %d\n"
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"Journal first block: %d\n"
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"Journal sequence: 0x%08x\n"
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"Journal start: %d\n"
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"Journal number of users: %d\n"),
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ntohl(jsb->s_blocksize), ntohl(jsb->s_maxlen),
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ntohl(jsb->s_first), ntohl(jsb->s_sequence),
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ntohl(jsb->s_start), ntohl(jsb->s_nr_users));
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for (i=0; i < ntohl(jsb->s_nr_users); i++) {
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uuid_unparse(&jsb->s_users[i*16], str);
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printf(i ? " %s\n"
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: _("Journal users: %s\n"),
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str);
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}
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}
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int main (int argc, char ** argv)
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{
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errcode_t retval;
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ext2_filsys fs;
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int print_badblocks = 0;
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int use_superblock = 0;
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int use_blocksize = 0;
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int image_dump = 0;
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int force = 0;
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int flags;
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int header_only = 0;
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int big_endian;
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int c;
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#ifdef ENABLE_NLS
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setlocale(LC_MESSAGES, "");
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setlocale(LC_CTYPE, "");
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bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
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textdomain(NLS_CAT_NAME);
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#endif
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initialize_ext2_error_table();
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fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
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E2FSPROGS_DATE);
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if (argc && *argv)
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program_name = *argv;
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while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
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switch (c) {
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case 'b':
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print_badblocks++;
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break;
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case 'f':
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force++;
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break;
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case 'h':
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header_only++;
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break;
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case 'i':
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image_dump++;
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break;
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case 'o':
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if (optarg[0] == 'b')
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use_superblock = atoi(optarg+1);
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else if (optarg[0] == 'B')
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use_blocksize = atoi(optarg+1);
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else
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usage();
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break;
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case 'V':
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/* Print version number and exit */
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fprintf(stderr, _("\tUsing %s\n"),
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error_message(EXT2_ET_BASE));
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exit(0);
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case 'x':
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num_format = "0x%04x";
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break;
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default:
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usage();
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}
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}
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if (optind > argc - 1)
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usage();
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sprintf(range_format, "%s-%s", num_format, num_format);
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device_name = argv[optind++];
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if (use_superblock && !use_blocksize)
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use_blocksize = 1024;
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flags = EXT2_FLAG_JOURNAL_DEV_OK;
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if (force)
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flags |= EXT2_FLAG_FORCE;
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if (image_dump)
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flags |= EXT2_FLAG_IMAGE_FILE;
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retval = ext2fs_open (device_name, flags, use_superblock,
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use_blocksize, unix_io_manager, &fs);
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if (retval) {
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com_err (program_name, retval, _("while trying to open %s"),
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device_name);
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printf (_("Couldn't find valid filesystem superblock.\n"));
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exit (1);
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}
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if (print_badblocks) {
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list_bad_blocks(fs, 1);
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} else {
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big_endian = ((fs->flags & EXT2_FLAG_SWAP_BYTES) != 0);
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#ifdef WORDS_BIGENDIAN
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big_endian = !big_endian;
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#endif
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if (big_endian)
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printf(_("Note: This is a byte-swapped filesystem\n"));
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list_super (fs->super);
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if (fs->super->s_feature_incompat &
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EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
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print_journal_information(fs);
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ext2fs_close(fs);
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exit(0);
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}
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list_bad_blocks(fs, 0);
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if (header_only) {
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ext2fs_close (fs);
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exit (0);
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}
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retval = ext2fs_read_bitmaps (fs);
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list_desc (fs);
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if (retval) {
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printf(_("\n%s: %s: error reading bitmaps: %s\n"),
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program_name, device_name,
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error_message(retval));
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}
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}
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ext2fs_close (fs);
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exit (0);
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}
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