mirrors/ntfs-3g
0
0
Fork 0
mirror of https://git.code.sf.net/p/ntfs-3g/ntfs-3g.git synced 2024-12-04 15:34:28 +08:00
Code Issues Packages Projects Releases Wiki Activity
8d86fdefec
ntfs-3g/ntfsprogs/ntfsclone.c

1528 lines
36 KiB
C
Raw Blame History

/**
* ntfsclone - Part of the Linux-NTFS project.
*
* Copyright (c) 2003-2005 Szabolcs Szakacsits
* Copyright (c) 2004 Anton Altaparmakov
* Special image format support copyright (c) 2004 Per Olofsson
*
* Clone NTFS data and/or metadata to a sparse file, image, device or stdout.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include "config.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_VFS_H
# include <sys/vfs.h>
#endif
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include "debug.h"
#include "types.h"
#include "support.h"
#include "endians.h"
#include "bootsect.h"
#include "device.h"
#include "attrib.h"
#include "volume.h"
#include "mft.h"
#include "bitmap.h"
#include "inode.h"
#include "runlist.h"
#include "utils.h"
#if defined(linux) && defined(_IO) && !defined(BLKGETSIZE)
#define BLKGETSIZE _IO(0x12,96) /* Get device size in 512-byte blocks. */
#endif
#if defined(linux) && defined(_IOR) && !defined(BLKGETSIZE64)
#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* Get device size in bytes. */
#endif
static const char *EXEC_NAME = "ntfsclone";
struct {
int verbose;
int quiet;
int debug;
int force;
int overwrite;
int std_out;
int blkdev_out; /* output file is block device */
int metadata_only;
int ignore_fs_check;
int rescue;
int save_image;
int restore_image;
char *output;
char *volume;
struct statfs stfs;
} opt;
struct bitmap {
s64 size;
u8 *bm;
u8 padding[4]; /* Unused: padding to 64 bit. */
};
struct progress_bar {
u64 start;
u64 stop;
int resolution;
float unit;
};
typedef struct {
ntfs_inode *ni; /* inode being processed */
ntfs_attr_search_ctx *ctx; /* inode attribute being processed */
s64 inuse; /* number of clusters in use */
} ntfs_walk_clusters_ctx;
typedef int (ntfs_walk_op)(ntfs_inode *ni, void *data);
struct ntfs_walk_cluster {
ntfs_walk_op *inode_op; /* not implemented yet */
ntfs_walk_clusters_ctx *image;
};
ntfs_volume *vol = NULL;
struct bitmap lcn_bitmap;
int fd_in;
int fd_out;
FILE *msg_out = NULL;
int wipe = 0;
unsigned int nr_used_mft_records = 0;
unsigned int wiped_unused_mft_data = 0;
unsigned int wiped_unused_mft = 0;
unsigned int wiped_resident_data = 0;
unsigned int wiped_timestamp_data = 0;
#define IMAGE_MAGIC "\0ntfsclone-image"
#define IMAGE_MAGIC_SIZE 16
struct {
char magic[IMAGE_MAGIC_SIZE];
u8 major_ver;
u8 minor_ver;
u32 cluster_size;
s64 device_size;
s64 nr_clusters;
s64 inuse;
} __attribute__ ((__packed__)) image_hdr;
#define NTFS_MBYTE (1000 * 1000)
#define ERR_PREFIX "ERROR"
#define PERR_PREFIX ERR_PREFIX "(%d): "
#define NERR_PREFIX ERR_PREFIX ": "
#define LAST_METADATA_INODE 11
#define NTFS_MAX_CLUSTER_SIZE 65536
#define NTFS_SECTOR_SIZE 512
#define rounded_up_division(a, b) (((a) + (b - 1)) / (b))
#define read_all(f, p, n) io_all((f), (p), (n), 0)
#define write_all(f, p, n) io_all((f), (p), (n), 1)
GEN_PRINTF(Eprintf, stderr, NULL, FALSE)
GEN_PRINTF(Vprintf, msg_out, &opt.verbose, TRUE)
GEN_PRINTF(Qprintf, msg_out, &opt.quiet, FALSE)
static GEN_PRINTF(Printf, msg_out, NULL, FALSE)
static void perr_printf(const char *fmt, ...)
__attribute__((format(printf, 1, 2)));
static void perr_printf(const char *fmt, ...)
{
va_list ap;
int eo = errno;
Printf(PERR_PREFIX, eo);
va_start(ap, fmt);
vfprintf(msg_out, fmt, ap);
va_end(ap);
Printf(": %s\n", strerror(eo));
fflush(msg_out);
}
static void err_printf(const char *fmt, ...)
__attribute__((format(printf, 1, 2)));
static void err_printf(const char *fmt, ...)
{
va_list ap;
Printf(NERR_PREFIX);
va_start(ap, fmt);
vfprintf(msg_out, fmt, ap);
va_end(ap);
fflush(msg_out);
}
static int err_exit(const char *fmt, ...)
__attribute__((noreturn))
__attribute__((format(printf, 1, 2)));
static int err_exit(const char *fmt, ...)
{
va_list ap;
Printf(NERR_PREFIX);
va_start(ap, fmt);
vfprintf(msg_out, fmt, ap);
va_end(ap);
fflush(msg_out);
exit(1);
}
static int perr_exit(const char *fmt, ...)
__attribute__((noreturn))
__attribute__((format(printf, 1, 2)));
static int perr_exit(const char *fmt, ...)
{
va_list ap;
int eo = errno;
Printf(PERR_PREFIX, eo);
va_start(ap, fmt);
vfprintf(msg_out, fmt, ap);
va_end(ap);
Printf(": %s\n", strerror(eo));
fflush(msg_out);
exit(1);
}
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
Eprintf("\nUsage: %s [OPTIONS] SOURCE\n"
" Efficiently clone NTFS to a sparse file, image, device or standard output.\n"
"\n"
" -o, --output FILE Clone NTFS to the non-existent FILE\n"
" -O, --overwrite FILE Clone NTFS to FILE, overwriting if exists\n"
" -s, --save-image Save to the special image format\n"
" -r, --restore-image Restore from the special image format\n"
" --rescue Continue after disk read errors\n"
" -m, --metadata Clone *only* metadata (for NTFS experts)\n"
" --ignore-fs-check Ignore the filesystem check result\n"
" -f, --force Force to progress (DANGEROUS)\n"
" -h, --help Display this help\n"
#ifdef DEBUG
" -d, --debug Show debug information\n"
#endif
"\n"
" If FILE is '-' then send the image to the standard output. If SOURCE is '-'\n"
" and --restore-image is used then read the image from the standard input.\n"
"\n", EXEC_NAME);
Eprintf("%s%s", ntfs_bugs, ntfs_home);
exit(1);
}
static void parse_options(int argc, char **argv)
{
static const char *sopt = "-dfhmo:O:rs";
static const struct option lopt[] = {
#ifdef DEBUG
{ "debug", no_argument, NULL, 'd' },
#endif
{ "force", no_argument, NULL, 'f' },
{ "help", no_argument, NULL, 'h' },
{ "metadata", no_argument, NULL, 'm' },
{ "output", required_argument, NULL, 'o' },
{ "overwrite", required_argument, NULL, 'O' },
{ "restore-image", no_argument, NULL, 'r' },
{ "ignore-fs-check", no_argument, NULL, 'C' },
{ "rescue", no_argument, NULL, 'R' },
{ "save-image", no_argument, NULL, 's' },
{ NULL, 0, NULL, 0 }
};
char c;
memset(&opt, 0, sizeof(opt));
while ((c = getopt_long(argc, argv, sopt, lopt, NULL)) != (char)-1) {
switch (c) {
case 1: /* A non-option argument */
if (opt.volume)
usage();
opt.volume = argv[optind-1];
break;
case 'd':
opt.debug++;
break;
case 'f':
opt.force++;
break;
case 'h':
case '?':
usage();
case 'm':
opt.metadata_only++;
break;
case 'O':
opt.overwrite++;
case 'o':
if (opt.output)
usage();
opt.output = optarg;
break;
case 'r':
opt.restore_image++;
break;
case 'C':
opt.ignore_fs_check++;
break;
case 'R':
opt.rescue++;
break;
case 's':
opt.save_image++;
break;
default:
err_printf("Unknown option '%s'.\n", argv[optind-1]);
usage();
}
}
if (opt.output == NULL) {
err_printf("You must specify an output file.\n");
usage();
}
if (strcmp(opt.output, "-") == 0)
opt.std_out++;
if (opt.volume == NULL) {
err_printf("You must specify a device file.\n");
usage();
}
if (opt.metadata_only && opt.save_image)
err_exit("Saving only metadata to an image is not "
"supported!\n");
if (opt.metadata_only && opt.restore_image)
err_exit("Restoring only metadata from an image is not "
"supported!\n");
if (opt.metadata_only && opt.std_out)
err_exit("Cloning only metadata to stdout isn't supported!\n");
if (opt.ignore_fs_check && !opt.metadata_only)
err_exit("Filesystem check can be ignored only for metadata "
"cloning!\n");
if (opt.save_image && opt.restore_image)
err_exit("Saving and restoring an image at the same time "
"is not supported!\n");
if (!opt.std_out) {
struct stat st;
if (stat(opt.output, &st) == -1) {
if (errno != ENOENT)
perr_exit("Couldn't access '%s'", opt.output);
} else {
if (!opt.overwrite)
err_exit("Output file '%s' already exists.\n"
"Use option --overwrite if you want to"
" replace its content.\n", opt.output);
if (S_ISBLK(st.st_mode)) {
opt.blkdev_out = 1;
if (opt.metadata_only)
err_exit("Cloning only metadata to a "
"block device isn't supported!\n");
}
}
}
msg_out = stdout;
/* FIXME: this is a workaround for loosing debug info if stdout != stderr
and for the uncontrollable verbose messages in libntfs. Ughhh. */
if (opt.std_out)
msg_out = stderr;
else if (opt.debug)
stderr = stdout;
else
if (!(stderr = fopen("/dev/null", "rw")))
perr_exit("Couldn't open /dev/null");
}
static void progress_init(struct progress_bar *p, u64 start, u64 stop, int res)
{
p->start = start;
p->stop = stop;
p->unit = 100.0 / (stop - start);
p->resolution = res;
}
static void progress_update(struct progress_bar *p, u64 current)
{
float percent = p->unit * current;
if (current != p->stop) {
if ((current - p->start) % p->resolution)
return;
Printf("%6.2f percent completed\r", percent);
} else
Printf("100.00 percent completed\n");
fflush(msg_out);
}
/**
* nr_clusters_to_bitmap_byte_size
*
* Take the number of clusters in the volume and calculate the size of $Bitmap.
* The size will always be a multiple of 8 bytes.
*/
static s64 nr_clusters_to_bitmap_byte_size(s64 nr_clusters)
{
s64 bm_bsize;
bm_bsize = rounded_up_division(nr_clusters, 8);
bm_bsize = (bm_bsize + 7) & ~7;
Dprintf("Bitmap byte size : %lld (%lld clusters)\n",
bm_bsize, rounded_up_division(bm_bsize, vol->cluster_size));
return bm_bsize;
}
static s64 is_critical_metadata(ntfs_walk_clusters_ctx *image, runlist *rl)
{
s64 inode = image->ni->mft_no;
if (inode <= LAST_METADATA_INODE) {
/* Don't save bad sectors (both $Bad and unnamed are ignored */
if (inode == FILE_BadClus && image->ctx->attr->type == AT_DATA)
return 0;
if (inode != FILE_LogFile)
return rl->length;
if (image->ctx->attr->type == AT_DATA) {
/* Save at least the first 16 KiB of FILE_LogFile */
s64 s = (s64)16384 - rl->vcn * vol->cluster_size;
if (s > 0) {
s = rounded_up_division(s, vol->cluster_size);
if (rl->length < s)
s = rl->length;
return s;
}
return 0;
}
}
if (image->ctx->attr->type != AT_DATA)
return rl->length;
return 0;
}
static int io_all(void *fd, void *buf, int count, int do_write)
{
int i;
struct ntfs_device *dev = fd;
while (count > 0) {
if (do_write)
i = write(*(int *)fd, buf, count);
else if (opt.restore_image)
i = read(*(int *)fd, buf, count);
else
i = dev->d_ops->read(dev, buf, count);
if (i < 0) {
if (errno != EAGAIN && errno != EINTR)
return -1;
} else {
count -= i;
buf = i + (char *) buf;
}
}
return 0;
}
static void rescue_sector(void *fd, off_t pos, void *buff)
{
const char *badsector_magic = "BadSectoR\0";
struct ntfs_device *dev = fd;
if (opt.restore_image) {
if (lseek(*(int *)fd, pos, SEEK_SET) == (off_t)-1)
perr_exit("lseek");
} else {
if (vol->dev->d_ops->seek(dev, pos, SEEK_SET) == (off_t)-1)
perr_exit("seek input");
}
if (read_all(fd, buff, NTFS_SECTOR_SIZE) == -1) {
Printf("WARNING: Can't read sector at %llu, lost data.\n",
(unsigned long long)pos);
memset(buff, '?', NTFS_SECTOR_SIZE);
memmove(buff, badsector_magic, sizeof(badsector_magic));
}
}
static void copy_cluster(int rescue, off_t rescue_pos)
{
char buff[NTFS_MAX_CLUSTER_SIZE]; /* overflow checked at mount time */
/* vol is NULL if opt.restore_image is set */
u32 csize = image_hdr.cluster_size;
void *fd = (void *)&fd_in;
if (!opt.restore_image) {
csize = vol->cluster_size;
fd = vol->dev;
}
if (read_all(fd, buff, csize) == -1) {
u32 i;
if (!rescue || errno != EIO)
perr_exit("read_all");
for (i = 0; i < csize; i += NTFS_SECTOR_SIZE)
rescue_sector(fd, rescue_pos + i, buff + i);
}
if (opt.save_image) {
char cmd = 1;
if (write_all(&fd_out, &cmd, sizeof(cmd)) == -1)
perr_exit("write_all");
}
if (write_all(&fd_out, buff, csize) == -1) {
int err = errno;
perr_printf("Write failed");
if (err == EIO && opt.stfs.f_type == 0x517b)
Printf("Apparently you tried to clone to a remote "
"Windows computer but they don't\nhave "
"efficient sparse file handling by default. "
"Please try a different method.\n");
exit(1);
}
}
static void lseek_to_cluster(s64 lcn)
{
off_t pos;
pos = (off_t)(lcn * vol->cluster_size);
if (vol->dev->d_ops->seek(vol->dev, pos, SEEK_SET) == (off_t)-1)
perr_exit("lseek input");
if (opt.std_out || opt.save_image)
return;
if (lseek(fd_out, pos, SEEK_SET) == (off_t)-1)
perr_exit("lseek output");
}
static void image_skip_clusters(s64 count)
{
if (opt.save_image && count > 0) {
char buff[1 + sizeof(count)];
buff[0] = 0;
memcpy(buff + 1, &count, sizeof(count));
if (write_all(&fd_out, buff, sizeof(buff)) == -1)
perr_exit("write_all");
}
}
static void dump_clusters(ntfs_walk_clusters_ctx *image, runlist *rl)
{
s64 i, len; /* number of clusters to copy */
if (opt.std_out || !opt.metadata_only)
return;
if (!(len = is_critical_metadata(image, rl)))
return;
lseek_to_cluster(rl->lcn);
/* FIXME: this could give pretty suboptimal performance */
for (i = 0; i < len; i++)
copy_cluster(opt.rescue, rl->lcn + i);
}
static void clone_ntfs(u64 nr_clusters)
{
u64 cl, last_cl; /* current and last used cluster */
void *buf;
u32 csize = vol->cluster_size;
u64 p_counter = 0;
struct progress_bar progress;
if (opt.save_image)
Printf("Saving NTFS to image ...\n");
else
Printf("Cloning NTFS ...\n");
if ((buf = calloc(1, csize)) == NULL)
perr_exit("clone_ntfs");
progress_init(&progress, p_counter, nr_clusters, 100);
if (opt.save_image) {
if (write_all(&fd_out, &image_hdr, sizeof(image_hdr)) == -1)
perr_exit("write_all");
}
for (last_cl = cl = 0; cl < (u64)vol->nr_clusters; cl++) {
if (ntfs_bit_get(lcn_bitmap.bm, cl)) {
progress_update(&progress, ++p_counter);
lseek_to_cluster(cl);
image_skip_clusters(cl - last_cl - 1);
copy_cluster(opt.rescue, cl);
last_cl = cl;
continue;
}
if (opt.std_out && !opt.save_image) {
progress_update(&progress, ++p_counter);
if (write_all(&fd_out, buf, csize) == -1)
perr_exit("write_all");
}
}
image_skip_clusters(cl - last_cl - 1);
}
static void write_empty_clusters(s32 csize, s64 count,
struct progress_bar *progress, u64 *p_counter)
{
s64 i;
char buff[NTFS_MAX_CLUSTER_SIZE];
memset(buff, 0, csize);
for (i = 0; i < count; i++) {
if (write_all(&fd_out, buff, csize) == -1)
perr_exit("write_all");
progress_update(progress, ++(*p_counter));
}
}
static void restore_image(void)
{
s64 pos = 0, count;
s32 csize = image_hdr.cluster_size;
char cmd;
u64 p_counter = 0;
struct progress_bar progress;
Printf("Restoring NTFS from image ...\n");
progress_init(&progress, p_counter, opt.std_out ?
image_hdr.nr_clusters : image_hdr.inuse, 100);
while (pos < image_hdr.nr_clusters) {
if (read_all(&fd_in, &cmd, sizeof(cmd)) == -1)
perr_exit("read_all");
if (cmd == 0) {
if (read_all(&fd_in, &count, sizeof(count)) == -1)
perr_exit("read_all");
if (opt.std_out)
write_empty_clusters(csize, count,
&progress, &p_counter);
else {
if (lseek(fd_out, count * csize, SEEK_CUR)
== (off_t)-1)
perr_exit("restore_image: lseek");
}
pos += count;
} else if (cmd == 1) {
copy_cluster(0, 0);
pos++;
progress_update(&progress, ++p_counter);
} else
err_exit("Invalid command code in image\n");
}
}
#define WIPE_TIMESTAMPS(atype, attr) \
do { \
atype *ats; \
ats = (atype *)((char*)(attr) + (attr)->value_offset); \
\
ats->creation_time = 0; \
ats->last_data_change_time = 0; \
ats->last_mft_change_time= 0; \
ats->last_access_time = 0; \
\
wiped_timestamp_data += 32; \
\
} while(0)
static void wipe_timestamps(ntfs_walk_clusters_ctx *image)
{
ATTR_RECORD *a = image->ctx->attr;
if (image->ni->mft_no <= LAST_METADATA_INODE)
return;
if (a->type == AT_FILE_NAME)
WIPE_TIMESTAMPS(FILE_NAME_ATTR, a);
else if (a->type == AT_STANDARD_INFORMATION)
WIPE_TIMESTAMPS(STANDARD_INFORMATION, a);
}
static void wipe_resident_data(ntfs_walk_clusters_ctx *image)
{
ATTR_RECORD *a;
u32 i;
int n = 0;
u8 *p;
a = image->ctx->attr;
p = (u8*)a + le16_to_cpu(a->value_offset);
if (image->ni->mft_no <= LAST_METADATA_INODE)
return;
if (a->type != AT_DATA)
return;
for (i = 0; i < le32_to_cpu(a->value_length); i++) {
if (p[i]) {
p[i] = 0;
n++;
}
}
wiped_resident_data += n;
}
static void clone_logfile_parts(ntfs_walk_clusters_ctx *image, runlist *rl)
{
s64 offset = 0, lcn, vcn;
while (1) {
vcn = offset / image->ni->vol->cluster_size;
lcn = ntfs_rl_vcn_to_lcn(rl, vcn);
if (lcn < 0)
break;
lseek_to_cluster(lcn);
copy_cluster(opt.rescue, lcn);
if (offset == 0)
offset = NTFS_BLOCK_SIZE >> 1;
else
offset <<= 1;
}
}
static void walk_runs(struct ntfs_walk_cluster *walk)
{
int i, j;
runlist *rl;
ATTR_RECORD *a;
ntfs_attr_search_ctx *ctx;
ctx = walk->image->ctx;
a = ctx->attr;
if (!a->non_resident) {
if (wipe) {
wipe_resident_data(walk->image);
wipe_timestamps(walk->image);
}
return;
}
if (!(rl = ntfs_mapping_pairs_decompress(vol, a, NULL)))
perr_exit("ntfs_decompress_mapping_pairs");
for (i = 0; rl[i].length; i++) {
s64 lcn = rl[i].lcn;
s64 lcn_length = rl[i].length;
if (lcn == LCN_HOLE || lcn == LCN_RL_NOT_MAPPED)
continue;
/* FIXME: ntfs_mapping_pairs_decompress should return error */
if (lcn < 0 || lcn_length < 0)
err_exit("Corrupt runlist in inode %lld attr %x LCN "
"%llx length %llx\n", ctx->ntfs_ino->mft_no,
(unsigned int)le32_to_cpu(a->type), lcn,
lcn_length);
if (!wipe)
dump_clusters(walk->image, rl + i);
for (j = 0; j < lcn_length; j++) {
u64 k = (u64)lcn + j;
if (ntfs_bit_get_and_set(lcn_bitmap.bm, k, 1))
err_exit("Cluster %llu referenced twice!\n"
"You didn't shutdown your Windows"
"properly?\n", (unsigned long long)k);
}
walk->image->inuse += lcn_length;
}
if (!wipe && !opt.std_out && opt.metadata_only &&
walk->image->ni->mft_no == FILE_LogFile &&
walk->image->ctx->attr->type == AT_DATA)
clone_logfile_parts(walk->image, rl);
free(rl);
}
static void walk_attributes(struct ntfs_walk_cluster *walk)
{
ntfs_attr_search_ctx *ctx;
if (!(ctx = ntfs_attr_get_search_ctx(walk->image->ni, NULL)))
perr_exit("ntfs_get_attr_search_ctx");
while (!ntfs_attrs_walk(ctx)) {
if (ctx->attr->type == AT_END)
break;
walk->image->ctx = ctx;
walk_runs(walk);
}
ntfs_attr_put_search_ctx(ctx);
}
static void compare_bitmaps(struct bitmap *a)
{
s64 i, pos, count;
int mismatch = 0;
u8 bm[NTFS_BUF_SIZE];
Printf("Accounting clusters ...\n");
pos = 0;
while (1) {
count = ntfs_attr_pread(vol->lcnbmp_na, pos, NTFS_BUF_SIZE, bm);
if (count == -1)
perr_exit("Couldn't get $Bitmap $DATA");
if (count == 0) {
if (a->size != pos)
err_exit("$Bitmap file size doesn't match "
"calculated size (%lld != %lld)\n",
a->size, pos);
break;
}
for (i = 0; i < count; i++, pos++) {
s64 cl; /* current cluster */
if (a->bm[pos] == bm[i])
continue;
for (cl = pos * 8; cl < (pos + 1) * 8; cl++) {
char bit;
bit = ntfs_bit_get(a->bm, cl);
if (bit == ntfs_bit_get(bm, i * 8 + cl % 8))
continue;
if (opt.ignore_fs_check) {
lseek_to_cluster(cl);
copy_cluster(opt.rescue, cl);
}
if (++mismatch > 10)
continue;
Printf("Cluster accounting failed at %lld "
"(0x%llx): %s cluster in $Bitmap\n",
(long long)cl, (unsigned long long)cl,
bit ? "missing" : "extra");
}
}
}
if (mismatch) {
Printf("Totally %d cluster accounting mismatches.\n", mismatch);
if (opt.ignore_fs_check) {
Printf("WARNING: The NTFS inconsistency was overruled "
"by the --ignore-fs-check option.\n");
return;
}
err_exit("Filesystem check failed! Windows wasn't shutdown "
"properly or inconsistent\nfilesystem. Please run "
"chkdsk on Windows.\n");
}
}
static int wipe_data(char *p, int pos, int len)
{
int wiped = 0;
for (p += pos; --len >= 0;) {
if (p[len]) {
p[len] = 0;
wiped++;
}
}
return wiped;
}
static void wipe_unused_mft_data(ntfs_inode *ni)
{
int unused;
MFT_RECORD *m = ni->mrec;
/* FIXME: broken MFTMirr update was fixed in libntfs, check if OK now */
if (ni->mft_no <= LAST_METADATA_INODE)
return;
unused = le32_to_cpu(m->bytes_allocated) - le32_to_cpu(m->bytes_in_use);
wiped_unused_mft_data += wipe_data((char *)m,
le32_to_cpu(m->bytes_in_use), unused);
}
static void wipe_unused_mft(ntfs_inode *ni)
{
int unused;
MFT_RECORD *m = ni->mrec;
/* FIXME: broken MFTMirr update was fixed in libntfs, check if OK now */
if (ni->mft_no <= LAST_METADATA_INODE)
return;
unused = le32_to_cpu(m->bytes_in_use) - sizeof(MFT_RECORD);
wiped_unused_mft += wipe_data((char *)m, sizeof(MFT_RECORD), unused);
}
static int walk_clusters(ntfs_volume *volume, struct ntfs_walk_cluster *walk)
{
s64 inode = 0;
s64 last_mft_rec;
ntfs_inode *ni;
struct progress_bar progress;
Printf("Scanning volume ...\n");
last_mft_rec = (volume->mft_na->initialized_size >>
volume->mft_record_size_bits) - 1;
progress_init(&progress, inode, last_mft_rec, 100);
for (; inode <= last_mft_rec; inode++) {
int err, deleted_inode;
MFT_REF mref = (MFT_REF)inode;
progress_update(&progress, inode);
/* FIXME: Terrible kludge for libntfs not being able to return
a deleted MFT record as inode */
ni = (ntfs_inode*)calloc(1, sizeof(ntfs_inode));
if (!ni)
perr_exit("walk_clusters");
ni->vol = volume;
err = ntfs_file_record_read(volume, mref, &ni->mrec, NULL);
if (err == -1) {
free(ni);
continue;
}
deleted_inode = !(ni->mrec->flags & MFT_RECORD_IN_USE);
if (deleted_inode) {
ni->mft_no = MREF(mref);
if (wipe) {
wipe_unused_mft(ni);
wipe_unused_mft_data(ni);
if (ntfs_mft_record_write(volume, ni->mft_no, ni->mrec))
perr_exit("ntfs_mft_record_write");
}
}
if (ni->mrec)
free(ni->mrec);
free(ni);
if (deleted_inode)
continue;
if ((ni = ntfs_inode_open(volume, mref)) == NULL) {
/* FIXME: continue only if it make sense, e.g.
MFT record not in use based on $MFT bitmap */
if (errno == EIO || errno == ENOENT)
continue;
perr_exit("Reading inode %lld failed", inode);
}
if (wipe)
nr_used_mft_records++;
if (ni->mrec->base_mft_record)
goto out;
walk->image->ni = ni;
walk_attributes(walk);
out:
if (wipe) {
wipe_unused_mft_data(ni);
if (ntfs_mft_record_write(volume, ni->mft_no, ni->mrec))
perr_exit("ntfs_mft_record_write");
}
if (ntfs_inode_close(ni))
perr_exit("ntfs_inode_close for inode %lld", inode);
}
return 0;
}
/*
* $Bitmap can overlap the end of the volume. Any bits in this region
* must be set. This region also encompasses the backup boot sector.
*/
static void bitmap_file_data_fixup(s64 cluster, struct bitmap *bm)
{
for (; cluster < bm->size << 3; cluster++)
ntfs_bit_set(bm->bm, (u64)cluster, 1);
}
/*
* Allocate a block of memory with one bit for each cluster of the disk.
* All the bits are set to 0, except those representing the region beyond the
* end of the disk.
*/
static void setup_lcn_bitmap(void)
{
/* Determine lcn bitmap byte size and allocate it. */
lcn_bitmap.size = nr_clusters_to_bitmap_byte_size(vol->nr_clusters);
if (!(lcn_bitmap.bm = (unsigned char *)calloc(1, lcn_bitmap.size)))
perr_exit("Failed to allocate internal buffer");
bitmap_file_data_fixup(vol->nr_clusters, &lcn_bitmap);
}
static s64 volume_size(ntfs_volume *volume, s64 nr_clusters)
{
return nr_clusters * volume->cluster_size;
}
static void print_volume_size(const char *str, s64 bytes)
{
Printf("%s: %lld bytes (%lld MB)\n", str, (long long)bytes,
(long long)rounded_up_division(bytes, NTFS_MBYTE));
}
static void print_disk_usage(u32 cluster_size, s64 nr_clusters, s64 inuse)
{
s64 total, used;
total = nr_clusters * cluster_size;
used = inuse * cluster_size;
Printf("Space in use : %lld MB (%.1f%%) ",
(long long)rounded_up_division(used, NTFS_MBYTE),
100.0 * ((float)used / total));
Printf("\n");
}
static void print_image_info(void)
{
Printf("NTFS volume version: %d.%d\n",
image_hdr.major_ver, image_hdr.minor_ver);
Printf("Cluster size : %u bytes\n",
(unsigned int)image_hdr.cluster_size);
print_volume_size("Image volume size ",
image_hdr.nr_clusters * image_hdr.cluster_size);
Printf("Image device size : %lld bytes\n", image_hdr.device_size);
print_disk_usage(image_hdr.cluster_size,
image_hdr.nr_clusters,
image_hdr.inuse);
}
static void check_if_mounted(const char *device, unsigned long new_mntflag)
{
unsigned long mntflag;
if (ntfs_check_if_mounted(device, &mntflag))
perr_exit("Failed to check '%s' mount state", device);
if (mntflag & NTFS_MF_MOUNTED) {
if (!(mntflag & NTFS_MF_READONLY))
err_exit("Device '%s' is mounted read-write. "
"You must 'umount' it first.\n", device);
if (!new_mntflag)
err_exit("Device '%s' is mounted. "
"You must 'umount' it first.\n", device);
}
}
/**
* First perform some checks to determine if the volume is already mounted, or
* is dirty (Windows wasn't shutdown properly). If everything is OK, then mount
* the volume (load the metadata into memory).
*/
static void mount_volume(unsigned long new_mntflag)
{
check_if_mounted(opt.volume, new_mntflag);
if (!(vol = ntfs_mount(opt.volume, new_mntflag))) {
int err = errno;
perr_printf("Opening '%s' as NTFS failed", opt.volume);
if (err == EINVAL) {
Printf("Apparently device '%s' doesn't have a "
"valid NTFS. Maybe you selected\nthe whole "
"disk instead of a partition (e.g. /dev/hda, "
"not /dev/hda1)?\n", opt.volume);
}
exit(1);
}
if (vol->flags & VOLUME_IS_DIRTY)
if (opt.force-- <= 0)
err_exit("Volume is dirty. Run chkdsk and "
"please try again (or see -f option).\n");
if (NTFS_MAX_CLUSTER_SIZE < vol->cluster_size)
err_exit("Cluster size %u is too large!\n",
(unsigned int)vol->cluster_size);
Printf("NTFS volume version: %d.%d\n", vol->major_ver, vol->minor_ver);
if (ntfs_version_is_supported(vol))
perr_exit("Unknown NTFS version");
Printf("Cluster size : %u bytes\n",
(unsigned int)vol->cluster_size);
print_volume_size("Current volume size",
volume_size(vol, vol->nr_clusters));
}
struct ntfs_walk_cluster backup_clusters = { NULL, NULL };
static int device_offset_valid(int fd, s64 ofs)
{
char ch;
if (lseek(fd, ofs, SEEK_SET) >= 0 && read(fd, &ch, 1) == 1)
return 0;
return -1;
}
static s64 device_size_get(int fd)
{
s64 high, low;
#ifdef BLKGETSIZE64
{ u64 size;
if (ioctl(fd, BLKGETSIZE64, &size) >= 0) {
Dprintf("BLKGETSIZE64 nr bytes = %llu (0x%llx)\n",
(unsigned long long)size,
(unsigned long long)size);
return (s64)size;
}
}
#endif
#ifdef BLKGETSIZE
{ unsigned long size;
if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
Dprintf("BLKGETSIZE nr 512 byte blocks = %lu "
"(0x%lx)\n", size, size);
return (s64)size * 512;
}
}
#endif
#ifdef FDGETPRM
{ struct floppy_struct this_floppy;
if (ioctl(fd, FDGETPRM, &this_floppy) >= 0) {
Dprintf("FDGETPRM nr 512 byte blocks = %lu (0x%lx)\n",
this_floppy.size, this_floppy.size);
return (s64)this_floppy.size * 512;
}
}
#endif
/*
* We couldn't figure it out by using a specialized ioctl,
* so do binary search to find the size of the device.
*/
low = 0LL;
for (high = 1024LL; !device_offset_valid(fd, high); high <<= 1)
low = high;
while (low < high - 1LL) {
const s64 mid = (low + high) / 2;
if (!device_offset_valid(fd, mid))
low = mid;
else
high = mid;
}
lseek(fd, 0LL, SEEK_SET);
return (low + 1LL);
}
static void fsync_clone(int fd)
{
Printf("Syncing ...\n");
if (fsync(fd) && errno != EINVAL)
perr_exit("fsync");
}
static void set_filesize(s64 filesize)
{
long fs_type = 0; /* Unknown filesystem type */
if (fstatfs(fd_out, &opt.stfs) == -1)
Printf("WARNING: Couldn't get filesystem type: "
"%s\n", strerror(errno));
else
fs_type = opt.stfs.f_type;
if (fs_type == 0x52654973)
Printf("WARNING: You're using ReiserFS, it has very poor "
"performance creating\nlarge sparse files. The next "
"operation might take a very long time!\n"
"Creating sparse output file ...\n");
else if (fs_type == 0x517b)
Printf("WARNING: You're using SMBFS and if the remote share "
"isn't Samba but a Windows\ncomputer then the clone "
"operation will be very inefficient and may fail!\n");
if (ftruncate(fd_out, filesize) == -1) {
int err = errno;
perr_printf("ftruncate failed for file '%s'", opt.output);
if (fs_type)
Printf("Destination filesystem type is 0x%lx.\n",
(unsigned long)fs_type);
if (err == E2BIG) {
Printf("Your system or the destination filesystem "
"doesn't support large files.\n");
if (fs_type == 0x517b) {
Printf("SMBFS needs minimum Linux kernel "
"version 2.4.25 and\n the 'lfs' option"
"\nfor smbmount to have large "
"file support.\n");
}
} else if (err == EPERM) {
Printf("Apparently the destination filesystem doesn't "
"support sparse files.\nYou can overcome this "
"by using the more efficient --save-image "
"option\nof ntfsclone. Use the --restore-image "
"option to restore the image.\n");
}
exit(1);
}
}
static s64 open_image(void)
{
if (strcmp(opt.volume, "-") == 0) {
if ((fd_in = fileno(stdin)) == -1)
perr_exit("fileno for stdout failed");
} else {
if ((fd_in = open(opt.volume, O_RDONLY)) == -1)
perr_exit("failed to open image");
}
if (read_all(&fd_in, &image_hdr, sizeof(image_hdr)) == -1)
perr_exit("read_all");
if (memcmp(image_hdr.magic, IMAGE_MAGIC, IMAGE_MAGIC_SIZE) != 0)
err_exit("Input file is not an image! (invalid magic)\n");
return image_hdr.device_size;
}
static s64 open_volume(void)
{
s64 device_size;
mount_volume(MS_RDONLY);
device_size = ntfs_device_size_get(vol->dev, 1);
if (device_size <= 0)
err_exit("Couldn't get device size (%lld)!\n", device_size);
print_volume_size("Current device size", device_size);
if (device_size < vol->nr_clusters * vol->cluster_size)
err_exit("Current NTFS volume size is bigger than the device "
"size (%lld)!\nCorrupt partition table or incorrect "
"device partitioning?\n", device_size);
return device_size;
}
static void initialise_image_hdr(s64 device_size, s64 inuse)
{
memcpy(image_hdr.magic, IMAGE_MAGIC, IMAGE_MAGIC_SIZE);
image_hdr.major_ver = vol->major_ver;
image_hdr.minor_ver = vol->minor_ver;
image_hdr.cluster_size = vol->cluster_size;
image_hdr.device_size = device_size;
image_hdr.nr_clusters = vol->nr_clusters;
image_hdr.inuse = inuse;
}
static void check_output_device(s64 input_size)
{
if (opt.blkdev_out) {
s64 dest_size = device_size_get(fd_out);
if (dest_size < input_size)
err_exit("Output device is too small (%lld) to fit the "
"NTFS image (%lld).\n", dest_size, input_size);
check_if_mounted(opt.output, 0);
} else
set_filesize(input_size);
}
static ntfs_attr_search_ctx *attr_get_search_ctx(ntfs_inode *ni, MFT_RECORD *mrec)
{
ntfs_attr_search_ctx *ret;
if ((ret = ntfs_attr_get_search_ctx(ni, mrec)) == NULL)
perr_printf("ntfs_attr_get_search_ctx");
return ret;
}
static int str2unicode(const char *aname, ntfschar **ustr, int *len)
{
if (aname && ((*len = ntfs_mbstoucs(aname, ustr, 0)) == -1)) {
perr_printf("Unable to convert '%s' to Unicode", aname);
return -1;
}
if (!*ustr || !*len) {
*ustr = AT_UNNAMED;
*len = 0;
}
return 0;
}
/**
* lookup_data_attr
*
* Find the $DATA attribute (with or without a name) for the given ntfs inode.
*/
static ntfs_attr_search_ctx *lookup_data_attr(ntfs_inode *ni, const char *aname)
{
ntfs_attr_search_ctx *ctx;
ntfschar *ustr = NULL;
int len = 0;
if ((ctx = attr_get_search_ctx(ni, NULL)) == NULL)
return NULL;
if (str2unicode(aname, &ustr, &len) == -1)
goto error_out;
if (ntfs_attr_lookup(AT_DATA, ustr, len, 0, 0, NULL, 0, ctx)) {
perr_printf("ntfs_attr_lookup");
goto error_out;
}
if (ustr != AT_UNNAMED)
free(ustr);
return ctx;
error_out:
ntfs_attr_put_search_ctx(ctx);
return NULL;
}
static void ignore_bad_clusters(ntfs_walk_clusters_ctx *image)
{
ntfs_inode *ni;
ntfs_attr_search_ctx *ctx = NULL;
runlist *rl, *rl_bad;
s64 nr_bad_clusters = 0;
if (!(ni = ntfs_inode_open(vol, FILE_BadClus)))
perr_exit("ntfs_open_inode");
if ((ctx = lookup_data_attr(ni, "$Bad")) == NULL)
exit(1);
if (!(rl_bad = ntfs_mapping_pairs_decompress(vol, ctx->attr, NULL)))
perr_exit("ntfs_mapping_pairs_decompress");
for (rl = rl_bad; rl->length; rl++) {
s64 lcn = rl->lcn;
if (lcn == LCN_HOLE || lcn < 0)
continue;
for (; lcn < rl->lcn + rl->length; lcn++, nr_bad_clusters++) {
if (ntfs_bit_get_and_set(lcn_bitmap.bm, lcn, 0))
image->inuse--;
}
}
if (nr_bad_clusters)
Printf("WARNING: The disk has %lld or more bad sectors"
" (hardware faults).\n", nr_bad_clusters);
free(rl_bad);
ntfs_attr_put_search_ctx(ctx);
if (ntfs_inode_close(ni))
perr_exit("ntfs_inode_close failed for $BadClus");
}
int main(int argc, char **argv)
{
ntfs_walk_clusters_ctx image;
s64 device_size; /* input device size in bytes */
s64 ntfs_size;
unsigned int wiped_total = 0;
/* print to stderr, stdout can be an NTFS image ... */
Eprintf("%s v%s\n", EXEC_NAME, VERSION);
msg_out = stderr;
parse_options(argc, argv);
utils_set_locale();
if (opt.restore_image) {
device_size = open_image();
ntfs_size = image_hdr.nr_clusters * image_hdr.cluster_size;
} else {
device_size = open_volume();
ntfs_size = vol->nr_clusters * vol->cluster_size;
}
ntfs_size += 512; /* add backup boot sector */
if (opt.std_out) {
if ((fd_out = fileno(stdout)) == -1)
perr_exit("fileno for stdout failed");
} else {
/* device_size_get() might need to read() */
int flags = O_RDWR;
if (!opt.blkdev_out) {
flags |= O_CREAT | O_TRUNC;
if (!opt.overwrite)
flags |= O_EXCL;
}
if ((fd_out = open(opt.output, flags, S_IRWXU)) == -1)
perr_exit("Opening file '%s' failed", opt.output);
if (!opt.save_image)
check_output_device(ntfs_size);
}
if (opt.restore_image) {
print_image_info();
restore_image();
fsync_clone(fd_out);
exit(0);
}
setup_lcn_bitmap();
memset(&image, 0, sizeof(image));
backup_clusters.image = &image;
walk_clusters(vol, &backup_clusters);
compare_bitmaps(&lcn_bitmap);
print_disk_usage(vol->cluster_size, vol->nr_clusters, image.inuse);
ignore_bad_clusters(&image);
if (opt.save_image)
initialise_image_hdr(device_size, image.inuse);
/* FIXME: save backup boot sector */
if (opt.std_out || !opt.metadata_only) {
s64 nr_clusters_to_save = image.inuse;
if (opt.std_out && !opt.save_image)
nr_clusters_to_save = vol->nr_clusters;
clone_ntfs(nr_clusters_to_save);
fsync_clone(fd_out);
exit(0);
}
wipe = 1;
opt.volume = opt.output;
/* 'force' again mount for dirty volumes (e.g. after resize).
FIXME: use mount flags to avoid potential side-effects in future */
opt.force++;
mount_volume(0);
free(lcn_bitmap.bm);
setup_lcn_bitmap();
memset(&image, 0, sizeof(image));
backup_clusters.image = &image;
walk_clusters(vol, &backup_clusters);
Printf("Num of MFT records = %10lld\n",
(long long)vol->mft_na->initialized_size >>
vol->mft_record_size_bits);
Printf("Num of used MFT records = %10u\n", nr_used_mft_records);
Printf("Wiped unused MFT data = %10u\n", wiped_unused_mft_data);
Printf("Wiped deleted MFT data = %10u\n", wiped_unused_mft);
Printf("Wiped resident user data = %10u\n", wiped_resident_data);
Printf("Wiped timestamp data = %10u\n", wiped_timestamp_data);
wiped_total += wiped_unused_mft_data;
wiped_total += wiped_unused_mft;
wiped_total += wiped_resident_data;
wiped_total += wiped_timestamp_data;
Printf("Wiped totally = %10u\n", wiped_total);
fsync_clone(fd_out);
exit(0);
}
Reference in New Issue View Git Blame Copy Permalink