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e2fsprogs/misc/dumpe2fs.c

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/*
* 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
*/
#include "config.h"
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fs.h"
#include "e2p/e2p.h"
#include "ext2fs/kernel-jbd.h"
#include <uuid/uuid.h>
#include "support/nls-enable.h"
#include "support/plausible.h"
#include "../version.h"
#define in_use(m, x) (ext2fs_test_bit ((x), (m)))
static const char * program_name = "dumpe2fs";
static char * device_name = NULL;
static int hex_format = 0;
static int blocks64 = 0;
static void usage(void)
{
fprintf(stderr, _("Usage: %s [-bfghimxV] [-o superblock=<num>] "
"[-o blocksize=<num>] device\n"), program_name);
exit(1);
}
static void print_number(unsigned long long num)
{
if (hex_format) {
if (blocks64)
printf("0x%08llx", num);
else
printf("0x%04llx", num);
} else
printf("%llu", num);
}
static void print_range(unsigned long long a, unsigned long long b)
{
if (hex_format) {
if (blocks64)
printf("0x%08llx-0x%08llx", a, b);
else
printf("0x%04llx-0x%04llx", a, b);
} else
printf("%llu-%llu", a, b);
}
static void print_free(unsigned long group, char * bitmap,
unsigned long num, unsigned long offset, int ratio)
{
int p = 0;
unsigned long i;
unsigned long j;
offset /= ratio;
offset += group * num;
for (i = 0; i < num; i++)
if (!in_use (bitmap, i))
{
if (p)
printf (", ");
print_number((i + offset) * ratio);
for (j = i; j < num && !in_use (bitmap, j); j++)
;
if (--j != i) {
fputc('-', stdout);
print_number((j + offset) * ratio);
i = j;
}
p = 1;
}
}
static void print_bg_opt(int bg_flags, int mask,
const char *str, int *first)
{
if (bg_flags & mask) {
if (*first) {
fputs(" [", stdout);
*first = 0;
} else
fputs(", ", stdout);
fputs(str, stdout);
}
}
static void print_bg_opts(ext2_filsys fs, dgrp_t i)
{
int first = 1, bg_flags = 0;
if (ext2fs_has_group_desc_csum(fs))
bg_flags = ext2fs_bg_flags(fs, i);
print_bg_opt(bg_flags, EXT2_BG_INODE_UNINIT, "INODE_UNINIT",
&first);
print_bg_opt(bg_flags, EXT2_BG_BLOCK_UNINIT, "BLOCK_UNINIT",
&first);
print_bg_opt(bg_flags, EXT2_BG_INODE_ZEROED, "ITABLE_ZEROED",
&first);
if (!first)
fputc(']', stdout);
fputc('\n', stdout);
}
static void print_bg_rel_offset(ext2_filsys fs, blk64_t block, int itable,
blk64_t first_block, blk64_t last_block)
{
if ((block >= first_block) && (block <= last_block)) {
if (itable && block == first_block)
return;
printf(" (+%u)", (unsigned)(block - first_block));
} else if (ext2fs_has_feature_flex_bg(fs->super)) {
dgrp_t flex_grp = ext2fs_group_of_blk2(fs, block);
printf(" (bg #%u + %u)", flex_grp,
(unsigned)(block-ext2fs_group_first_block2(fs,flex_grp)));
}
}
static void list_desc(ext2_filsys fs, int grp_only)
{
unsigned long i;
blk64_t first_block, last_block;
blk64_t super_blk, old_desc_blk, new_desc_blk;
char *block_bitmap=NULL, *inode_bitmap=NULL;
const char *units = _("blocks");
int inode_blocks_per_group, old_desc_blocks, reserved_gdt;
int block_nbytes, inode_nbytes;
int has_super;
blk64_t blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block);
ext2_ino_t ino_itr = 1;
errcode_t retval;
if (ext2fs_has_feature_bigalloc(fs->super))
units = _("clusters");
block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8;
inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8;
if (fs->block_map)
block_bitmap = malloc(block_nbytes);
if (fs->inode_map)
inode_bitmap = malloc(inode_nbytes);
inode_blocks_per_group = ((fs->super->s_inodes_per_group *
EXT2_INODE_SIZE(fs->super)) +
EXT2_BLOCK_SIZE(fs->super) - 1) /
EXT2_BLOCK_SIZE(fs->super);
reserved_gdt = fs->super->s_reserved_gdt_blocks;
fputc('\n', stdout);
first_block = fs->super->s_first_data_block;
if (ext2fs_has_feature_meta_bg(fs->super))
old_desc_blocks = fs->super->s_first_meta_bg;
else
old_desc_blocks = fs->desc_blocks;
if (grp_only)
printf("group:block:super:gdt:bbitmap:ibitmap:itable\n");
for (i = 0; i < fs->group_desc_count; i++) {
first_block = ext2fs_group_first_block2(fs, i);
last_block = ext2fs_group_last_block2(fs, i);
ext2fs_super_and_bgd_loc2(fs, i, &super_blk,
&old_desc_blk, &new_desc_blk, 0);
if (grp_only) {
printf("%lu:%llu:", i, first_block);
if (i == 0 || super_blk)
printf("%llu:", super_blk);
else
printf("-1:");
if (old_desc_blk) {
print_range(old_desc_blk,
old_desc_blk + old_desc_blocks - 1);
printf(":");
} else if (new_desc_blk)
printf("%llu:", new_desc_blk);
else
printf("-1:");
printf("%llu:%llu:%llu\n",
ext2fs_block_bitmap_loc(fs, i),
ext2fs_inode_bitmap_loc(fs, i),
ext2fs_inode_table_loc(fs, i));
continue;
}
printf(_("Group %lu: (Blocks "), i);
print_range(first_block, last_block);
fputs(")", stdout);
if (ext2fs_has_group_desc_csum(fs)) {
unsigned csum = ext2fs_bg_checksum(fs, i);
unsigned exp_csum = ext2fs_group_desc_csum(fs, i);
printf(_(" csum 0x%04x"), csum);
if (csum != exp_csum)
printf(_(" (EXPECTED 0x%04x)"), exp_csum);
}
print_bg_opts(fs, i);
has_super = ((i==0) || super_blk);
if (has_super) {
printf (_(" %s superblock at "),
i == 0 ? _("Primary") : _("Backup"));
print_number(super_blk);
}
if (old_desc_blk) {
printf("%s", _(", Group descriptors at "));
print_range(old_desc_blk,
old_desc_blk + old_desc_blocks - 1);
if (reserved_gdt) {
printf("%s", _("\n Reserved GDT blocks at "));
print_range(old_desc_blk + old_desc_blocks,
old_desc_blk + old_desc_blocks +
reserved_gdt - 1);
}
} else if (new_desc_blk) {
fputc(has_super ? ',' : ' ', stdout);
printf("%s", _(" Group descriptor at "));
print_number(new_desc_blk);
has_super++;
}
if (has_super)
fputc('\n', stdout);
fputs(_(" Block bitmap at "), stdout);
print_number(ext2fs_block_bitmap_loc(fs, i));
print_bg_rel_offset(fs, ext2fs_block_bitmap_loc(fs, i), 0,
first_block, last_block);
if (ext2fs_has_feature_metadata_csum(fs->super))
printf(_(", csum 0x%08x"),
ext2fs_block_bitmap_checksum(fs, i));
if (getenv("DUMPE2FS_IGNORE_80COL"))
fputs(_(","), stdout);
else
fputs(_("\n "), stdout);
fputs(_(" Inode bitmap at "), stdout);
print_number(ext2fs_inode_bitmap_loc(fs, i));
print_bg_rel_offset(fs, ext2fs_inode_bitmap_loc(fs, i), 0,
first_block, last_block);
if (ext2fs_has_feature_metadata_csum(fs->super))
printf(_(", csum 0x%08x"),
ext2fs_inode_bitmap_checksum(fs, i));
fputs(_("\n Inode table at "), stdout);
print_range(ext2fs_inode_table_loc(fs, i),
ext2fs_inode_table_loc(fs, i) +
inode_blocks_per_group - 1);
print_bg_rel_offset(fs, ext2fs_inode_table_loc(fs, i), 1,
first_block, last_block);
printf (_("\n %u free %s, %u free inodes, "
"%u directories%s"),
ext2fs_bg_free_blocks_count(fs, i), units,
ext2fs_bg_free_inodes_count(fs, i),
ext2fs_bg_used_dirs_count(fs, i),
ext2fs_bg_itable_unused(fs, i) ? "" : "\n");
if (ext2fs_bg_itable_unused(fs, i))
printf (_(", %u unused inodes\n"),
ext2fs_bg_itable_unused(fs, i));
if (block_bitmap) {
fputs(_(" Free blocks: "), stdout);
retval = ext2fs_get_block_bitmap_range2(fs->block_map,
blk_itr, block_nbytes << 3, block_bitmap);
if (retval)
com_err("list_desc", retval,
"while reading block bitmap");
else
print_free(i, block_bitmap,
fs->super->s_clusters_per_group,
fs->super->s_first_data_block,
EXT2FS_CLUSTER_RATIO(fs));
fputc('\n', stdout);
blk_itr += fs->super->s_clusters_per_group;
}
if (inode_bitmap) {
fputs(_(" Free inodes: "), stdout);
retval = ext2fs_get_inode_bitmap_range2(fs->inode_map,
ino_itr, inode_nbytes << 3, inode_bitmap);
if (retval)
com_err("list_desc", retval,
"while reading inode bitmap");
else
print_free(i, inode_bitmap,
fs->super->s_inodes_per_group,
1, 1);
fputc('\n', stdout);
ino_itr += fs->super->s_inodes_per_group;
}
}
if (block_bitmap)
free(block_bitmap);
if (inode_bitmap)
free(inode_bitmap);
}
static void list_bad_blocks(ext2_filsys fs, int dump)
{
badblocks_list bb_list = 0;
badblocks_iterate bb_iter;
blk_t blk;
errcode_t retval;
const char *header, *fmt;
retval = ext2fs_read_bb_inode(fs, &bb_list);
if (retval) {
com_err("ext2fs_read_bb_inode", retval, 0);
return;
}
retval = ext2fs_badblocks_list_iterate_begin(bb_list, &bb_iter);
if (retval) {
com_err("ext2fs_badblocks_list_iterate_begin", retval,
"%s", _("while printing bad block list"));
return;
}
if (dump) {
header = fmt = "%u\n";
} else {
header = _("Bad blocks: %u");
fmt = ", %u";
}
while (ext2fs_badblocks_list_iterate(bb_iter, &blk)) {
printf(header ? header : fmt, blk);
header = 0;
}
ext2fs_badblocks_list_iterate_end(bb_iter);
if (!dump)
fputc('\n', stdout);
ext2fs_badblocks_list_free(bb_list);
}
static void print_inline_journal_information(ext2_filsys fs)
{
journal_superblock_t *jsb;
struct ext2_inode inode;
ext2_file_t journal_file;
errcode_t retval;
ino_t ino = fs->super->s_journal_inum;
char buf[1024];
if (fs->flags & EXT2_FLAG_IMAGE_FILE)
return;
retval = ext2fs_read_inode(fs, ino, &inode);
if (retval) {
com_err(program_name, retval, "%s",
_("while reading journal inode"));
exit(1);
}
retval = ext2fs_file_open2(fs, ino, &inode, 0, &journal_file);
if (retval) {
com_err(program_name, retval, "%s",
_("while opening journal inode"));
exit(1);
}
retval = ext2fs_file_read(journal_file, buf, sizeof(buf), 0);
if (retval) {
com_err(program_name, retval, "%s",
_("while reading journal super block"));
exit(1);
}
ext2fs_file_close(journal_file);
jsb = (journal_superblock_t *) buf;
if (be32_to_cpu(jsb->s_header.h_magic) != JFS_MAGIC_NUMBER) {
fprintf(stderr, "%s",
_("Journal superblock magic number invalid!\n"));
exit(1);
}
e2p_list_journal_super(stdout, buf, fs->blocksize, 0);
}
static void print_journal_information(ext2_filsys fs)
{
errcode_t retval;
char buf[1024];
journal_superblock_t *jsb;
/* Get the journal superblock */
if ((retval = io_channel_read_blk64(fs->io,
fs->super->s_first_data_block + 1,
-1024, buf))) {
com_err(program_name, retval, "%s",
_("while reading journal superblock"));
exit(1);
}
jsb = (journal_superblock_t *) buf;
if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
(jsb->s_header.h_blocktype !=
(unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
com_err(program_name, 0, "%s",
_("Couldn't find journal superblock magic numbers"));
exit(1);
}
e2p_list_journal_super(stdout, buf, fs->blocksize, 0);
}
static int check_mmp(ext2_filsys fs)
{
int retval;
/* This won't actually start MMP on the filesystem, since fs is opened
* readonly, but it will do the proper activity checking for us. */
retval = ext2fs_mmp_start(fs);
if (retval) {
com_err(program_name, retval, _("while trying to open %s"),
fs->device_name);
if (retval == EXT2_ET_MMP_FAILED ||
retval == EXT2_ET_MMP_FSCK_ON ||
retval == EXT2_ET_MMP_CSUM_INVALID ||
retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
if (fs->mmp_buf) {
struct mmp_struct *mmp = fs->mmp_buf;
time_t mmp_time = mmp->mmp_time;
fprintf(stderr,
"%s: MMP last updated by '%s' on %s",
program_name, mmp->mmp_nodename,
ctime(&mmp_time));
}
retval = 1;
} else {
retval = 2;
}
} else {
printf("%s: it is safe to mount '%s', MMP is clean\n",
program_name, fs->device_name);
}
return retval;
}
static void print_mmp_block(ext2_filsys fs)
{
struct mmp_struct *mmp;
time_t mmp_time;
errcode_t retval;
if (fs->mmp_buf == NULL) {
retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
if (retval) {
com_err(program_name, retval,
_("failed to alloc MMP buffer\n"));
return;
}
}
retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
/* this is only dumping, not checking status, so OK to skip this */
if (retval == EXT2_ET_OP_NOT_SUPPORTED)
return;
if (retval) {
com_err(program_name, retval,
_("reading MMP block %llu from '%s'\n"),
fs->super->s_mmp_block, fs->device_name);
return;
}
mmp = fs->mmp_buf;
mmp_time = mmp->mmp_time;
printf("MMP_block:\n");
printf(" mmp_magic: 0x%x\n", mmp->mmp_magic);
printf(" mmp_check_interval: %d\n", mmp->mmp_check_interval);
printf(" mmp_sequence: %#08x\n", mmp->mmp_seq);
printf(" mmp_update_date: %s", ctime(&mmp_time));
printf(" mmp_update_time: %lld\n", mmp->mmp_time);
printf(" mmp_node_name: %s\n", mmp->mmp_nodename);
printf(" mmp_device_name: %s\n", mmp->mmp_bdevname);
}
static void parse_extended_opts(const char *opts, blk64_t *superblock,
int *blocksize)
{
char *buf, *token, *next, *p, *arg, *badopt = 0;
int len;
int do_usage = 0;
len = strlen(opts);
buf = malloc(len+1);
if (!buf) {
fprintf(stderr, "%s",
_("Couldn't allocate memory to parse options!\n"));
exit(1);
}
strcpy(buf, opts);
for (token = buf; token && *token; token = next) {
p = strchr(token, ',');
next = 0;
if (p) {
*p = 0;
next = p+1;
}
arg = strchr(token, '=');
if (arg) {
*arg = 0;
arg++;
}
if (strcmp(token, "superblock") == 0 ||
strcmp(token, "sb") == 0) {
if (!arg) {
do_usage++;
badopt = token;
continue;
}
*superblock = strtoul(arg, &p, 0);
if (*p) {
fprintf(stderr,
_("Invalid superblock parameter: %s\n"),
arg);
do_usage++;
continue;
}
} else if (strcmp(token, "blocksize") == 0 ||
strcmp(token, "bs") == 0) {
if (!arg) {
do_usage++;
badopt = token;
continue;
}
*blocksize = strtoul(arg, &p, 0);
if (*p) {
fprintf(stderr,
_("Invalid blocksize parameter: %s\n"),
arg);
do_usage++;
continue;
}
} else {
do_usage++;
badopt = token;
}
}
if (do_usage) {
fprintf(stderr, _("\nBad extended option(s) specified: %s\n\n"
"Extended options are separated by commas, "
"and may take an argument which\n"
"\tis set off by an equals ('=') sign.\n\n"
"Valid extended options are:\n"
"\tsuperblock=<superblock number>\n"
"\tblocksize=<blocksize>\n"),
badopt ? badopt : "");
free(buf);
exit(1);
}
free(buf);
}
int main (int argc, char ** argv)
{
errcode_t retval;
errcode_t retval_csum = 0;
const char *error_csum = NULL;
ext2_filsys fs;
int print_badblocks = 0;
blk64_t use_superblock = 0;
int use_blocksize = 0;
int image_dump = 0;
int mmp_check = 0;
int mmp_info = 0;
int force = 0;
int flags;
int header_only = 0;
int c;
int grp_only = 0;
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
setlocale(LC_CTYPE, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
set_com_err_gettext(gettext);
#endif
add_error_table(&et_ext2_error_table);
if (argc && *argv) {
if (strrchr(*argv, '/'))
program_name = strrchr(*argv, '/') + 1;
else
program_name = *argv;
if (strstr(program_name, "mmpstatus") != NULL) {
mmp_check = 1;
header_only = 1;
}
}
if (!mmp_check)
fprintf(stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
E2FSPROGS_DATE);
while ((c = getopt(argc, argv, "bfghimxVo:")) != EOF) {
switch (c) {
case 'b':
print_badblocks++;
break;
case 'f':
force++;
break;
case 'g':
grp_only++;
break;
case 'h':
header_only++;
break;
case 'i':
if (mmp_check)
mmp_info++;
else
image_dump++;
break;
case 'm':
mmp_check++;
header_only++;
if (image_dump) {
mmp_info = image_dump;
image_dump = 0;
}
break;
case 'o':
parse_extended_opts(optarg, &use_superblock,
&use_blocksize);
break;
case 'V':
/* Print version number and exit */
fprintf(stderr, _("\tUsing %s\n"),
error_message(EXT2_ET_BASE));
exit(0);
case 'x':
hex_format++;
break;
default:
usage();
}
}
if (optind != argc - 1)
usage();
device_name = argv[optind++];
flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES |
EXT2_FLAG_64BITS;
if (force)
flags |= EXT2_FLAG_FORCE;
if (image_dump)
flags |= EXT2_FLAG_IMAGE_FILE;
try_open_again:
if (use_superblock && !use_blocksize) {
for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
use_blocksize <= EXT2_MAX_BLOCK_SIZE;
use_blocksize *= 2) {
retval = ext2fs_open (device_name, flags,
use_superblock,
use_blocksize, unix_io_manager,
&fs);
if (!retval)
break;
}
} else {
retval = ext2fs_open(device_name, flags, use_superblock,
use_blocksize, unix_io_manager, &fs);
}
flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
if (retval && !retval_csum) {
retval_csum = retval;
error_csum = _("while trying to open %s");
goto try_open_again;
}
if (retval) {
com_err(program_name, retval, _("while trying to open %s"),
device_name);
printf("%s", _("Couldn't find valid filesystem superblock.\n"));
if (retval == EXT2_ET_BAD_MAGIC)
check_plausibility(device_name, CHECK_FS_EXIST, NULL);
goto out;
}
fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
if (ext2fs_has_feature_64bit(fs->super))
blocks64 = 1;
if (mmp_check) {
if (ext2fs_has_feature_mmp(fs->super) &&
fs->super->s_mmp_block != 0) {
if (mmp_info) {
print_mmp_block(fs);
printf(" mmp_block_number: ");
print_number(fs->super->s_mmp_block);
printf("\n");
} else {
retval = check_mmp(fs);
}
if (!retval && retval_csum)
retval = 2;
} else {
fprintf(stderr, _("%s: MMP feature not enabled.\n"),
program_name);
retval = 2;
}
} else if (print_badblocks) {
list_bad_blocks(fs, 1);
} else {
if (grp_only)
goto just_descriptors;
list_super(fs->super);
if (ext2fs_has_feature_journal_dev(fs->super)) {
print_journal_information(fs);
goto out_close;
}
if (ext2fs_has_feature_journal(fs->super) &&
(fs->super->s_journal_inum != 0))
print_inline_journal_information(fs);
if (ext2fs_has_feature_mmp(fs->super) &&
fs->super->s_mmp_block != 0)
print_mmp_block(fs);
list_bad_blocks(fs, 0);
if (header_only)
goto out_close;
fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
try_bitmaps_again:
retval = ext2fs_read_bitmaps(fs);
if (retval && !retval_csum) {
fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
retval_csum = retval;
error_csum = _("while trying to read '%s' bitmaps\n");
goto try_bitmaps_again;
}
just_descriptors:
list_desc(fs, grp_only);
}
out_close:
if (retval_csum) {
com_err(program_name, retval_csum, error_csum, device_name);
printf("%s", _("*** Run e2fsck now!\n\n"));
if (!retval)
retval = retval_csum;
}
ext2fs_close_free(&fs);
remove_error_table(&et_ext2_error_table);
out:
return retval;
}
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