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ntfs-3g/ntfstools/ntfsresize.c

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/**
* ntfsresize - Part of the Linux-NTFS project.
*
* Copyright (c) 2002 Szabolcs Szakacsits
*
* This utility will resize an NTFS volume.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (in the main directory of the Linux-NTFS
* distribution in the file COPYING); if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.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 "disk_io.h"
#include "attrib.h"
#include "volume.h"
#include "mft.h"
#include "bitmap.h"
#include "inode.h"
#include "runlist.h"
const char *EXEC_NAME = "ntfsresize";
#define NTFS_REPORT_BANNER "\nReport bugs to linux-ntfs-dev@lists.sf.net. " \
"Homepage: http://linux-ntfs.sf.net\n"
#define NTFS_RESIZE_WARNING \
"WARNING: Every sanity check passed and only the DANGEROUS operations left.\n" \
"Please make sure all your important data had been backed up in case of an\n" \
"unexpected failure!\n"
#define NTFS_RESIZE_IMPORTANT \
"NTFS had been successfully resized on device '%s'.\n" \
"You can go on to resize the device e.g. with 'fdisk'.\n" \
"IMPORTANT: When recreating the partition, make sure you\n" \
" 1) create it with the same starting disk cylinder\n" \
" 2) create it with the same partition type (usually 7, HPFS/NTFS)\n" \
" 3) do not make it smaller than the new NTFS filesystem size\n" \
" 4) set the bootable flag for the partition if it existed before\n" \
"Otherwise you may lose your data or can't boot your computer from the disk!\n"
struct {
int verbose;
int debug;
int ro_flag;
int force;
int info;
s64 bytes;
char *volume;
} opt;
struct bitmap {
u8 *bm;
s64 size;
};
struct progress_bar {
u64 start;
u64 stop;
int resolution;
float unit;
};
ntfs_volume *vol = NULL;
struct bitmap lcn_bitmap;
#define NTFS_MBYTE (1000 * 1000)
#define ERR_PREFIX "ERROR"
#define PERR_PREFIX ERR_PREFIX "(%d): "
#define NERR_PREFIX ERR_PREFIX ": "
#define rounded_up_division(a, b) (((a) + (b - 1)) / (b))
void perr_printf(const char *fmt, ...)
{
va_list ap;
int eo = errno;
fprintf(stdout, PERR_PREFIX, eo);
va_start(ap, fmt);
vfprintf(stdout, fmt, ap);
va_end(ap);
printf(": %s\n", strerror(eo));
fflush(stdout);
fflush(stderr);
}
int err_exit(const char *fmt, ...)
{
va_list ap;
fprintf(stdout, NERR_PREFIX);
va_start(ap, fmt);
vfprintf(stdout, fmt, ap);
va_end(ap);
fflush(stdout);
fflush(stderr);
exit(1);
}
int perr_exit(const char *fmt, ...)
{
va_list ap;
int eo = errno;
fprintf(stdout, PERR_PREFIX, eo);
va_start(ap, fmt);
vfprintf(stdout, fmt, ap);
va_end(ap);
printf(": %s\n", strerror(eo));
fflush(stdout);
fflush(stderr);
exit(1);
}
void usage()
{
printf("\n");
printf ("Usage: %s [-fhin] [-s size[k|M|G]] device\n", EXEC_NAME);
printf("Shrink a defragmented NTFS volume.\n");
printf("\n");
Dprintf(" -d Show debug information\n");
printf (" -f Force to progress (DANGEROUS)\n");
printf (" -h This help text\n");
printf (" -i Calculate the smallest shrunken size supported (read-only)\n");
printf (" -n Make a test run without write operations (read-only)\n");
printf (" -s size[k|M|G] Shrink volume to size[k|M|G] bytes (k=10^3, M=10^6, G=10^9)\n");
/* printf (" -v Verbose operation\n"); */
printf("%s", NTFS_REPORT_BANNER);
exit(1);
}
/* Copy-paste from e2fsprogs */
void proceed_question(void)
{
char buf[256];
const char *short_yes = "yY";
fflush(stdout);
fflush(stderr);
printf("Are you sure you want to proceed (y/[n])? ");
buf[0] = 0;
fgets(buf, sizeof(buf), stdin);
if (strchr(short_yes, buf[0]) == 0) {
printf("OK quitting. NO CHANGES has been made to your NTFS volume.\n");
exit(1);
}
}
s64 get_new_volume_size(char *s)
{
s64 size;
char *suffix;
size = strtoll(s, &suffix, 10);
if (size <= 0 || errno == ERANGE)
err_exit("Illegal new volume size\n");
if (!*suffix)
return size;
if (strlen(suffix) > 1)
usage();
/* We follow the SI prefixes:
http://physics.nist.gov/cuu/Units/prefixes.html
http://physics.nist.gov/cuu/Units/binary.html
Disk partitioning tools use prefixes as,
k M G
old fdisk 2^10 2^20 10^3*2^20
recent fdisk 10^3 10^6 10^9
cfdisk 10^3 10^6 10^9
sfdisk 2^10 2^20
parted 2^10 2^20 (may change)
fdisk (DOS) 2^10 2^20
*/
/* FIXME: check for overflow */
switch (*suffix) {
case 'G':
size *= 1000;
case 'M':
size *= 1000;
case 'k':
size *= 1000;
break;
default:
usage();
}
return size;
}
void parse_options(int argc, char **argv)
{
char *s;
int i;
printf("%s v%s\n", EXEC_NAME, VERSION);
memset(&opt, 0, sizeof(opt));
while ((i = getopt(argc, argv, "dfhins:")) != EOF)
switch (i) {
case 'd':
opt.debug = 1;
break;
case 'f':
opt.force++;
break;
case 'h':
usage();
case 'i':
opt.info = 1;
break;
case 'n':
opt.ro_flag = MS_RDONLY;
break;
case 's':
opt.bytes = get_new_volume_size(optarg);
break;
case 'v':
opt.verbose++;
break;
default:
usage();
}
if (optind == argc)
usage();
opt.volume = argv[optind++];
if (optind < argc)
usage();
stderr = stdout;
if (!opt.debug)
if (!(stderr = fopen("/dev/null", "rw")))
perr_exit("Couldn't open /dev/null");
/* If no '-s size' then estimate smallest shrunken volume size */
if (!opt.bytes)
opt.info = 1;
if (opt.info) {
if (opt.bytes) {
printf(NERR_PREFIX "It makes no sense to use -i and "
"-s together.\n");
usage();
}
opt.ro_flag = MS_RDONLY;
}
}
s64 nr_clusters_to_bitmap_byte_size(s64 nr_clusters)
{
s64 bm_bsize;
bm_bsize = rounded_up_division(nr_clusters, 8);
/* Needs to be multiple of 8 bytes */
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;
}
void build_lcn_usage_bitmap(ATTR_RECORD *a)
{
run_list *rl;
int i, j;
if (!a->non_resident)
return;
if (!(rl = ntfs_decompress_mapping_pairs(vol, a, NULL)))
perr_exit("ntfs_decompress_mapping_pairs");
for (i = 0; rl[i].length; i++) {
if (rl[i].lcn == LCN_HOLE || rl[i].lcn == LCN_RL_NOT_MAPPED)
continue;
for (j = 0; j < rl[i].length; j++) {
u64 k = (u64)rl[i].lcn + j;
if (ntfs_get_and_set_bit(lcn_bitmap.bm, k, 1))
err_exit("Cluster %lu referenced twice!\n"
"You didn't shutdown your Windows"
"properly?", k);
}
}
free(rl);
}
void walk_attributes(MFT_RECORD *mr)
{
ntfs_attr_search_ctx *ctx;
if (!(ctx = ntfs_get_attr_search_ctx(NULL, mr)))
perr_exit("ntfs_get_attr_search_ctx");
while (!ntfs_walk_attrs(ctx)) {
if (ctx->attr->type == AT_END)
break;
build_lcn_usage_bitmap(ctx->attr);
}
ntfs_put_attr_search_ctx(ctx);
}
void get_bitmap_data(ntfs_volume *vol, struct bitmap *bm)
{
ntfs_inode *ni;
ntfs_attr_search_ctx *ctx;
if (!(ni = ntfs_open_inode(vol, (MFT_REF)FILE_Bitmap)))
perr_exit("ntfs_open_inode");
if (!(ctx = ntfs_get_attr_search_ctx(ni, NULL)))
perr_exit("ntfs_get_attr_search_ctx");
if (ntfs_lookup_attr(AT_DATA, AT_UNNAMED, 0, 0, 0, NULL, 0, ctx))
perr_exit("ntfs_lookup_attr");
/* FIXME: get_attribute_value_length() can't handle extents */
bm->size = get_attribute_value_length(ctx->attr);
if (!(bm->bm = (u8 *)malloc(bm->size)))
perr_exit("get_bitmap_data");
if (get_attribute_value(vol, ni->mrec, ctx->attr, bm->bm) != bm->size)
perr_exit("Couldn't get $Bitmap $DATA\n");
ntfs_put_attr_search_ctx(ctx);
ntfs_close_inode(ni);
}
void compare_bitmaps(struct bitmap *a, struct bitmap *b)
{
int i;
if (a->size != b->size)
err_exit("$Bitmap file size doesn't match "
"calculated size ((%d != %d)\n", a->size, b->size);
for (i = 0; i < a->size; i++)
if (a->bm[i] != b->bm[i])
err_exit("Cluster bitmaps differ at %d (%d != %d)\n"
"You didn't shutdown your Windows properly?",
i, a->bm[i], b->bm[i]);
}
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;
}
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(stdout);
}
void walk_inodes()
{
s32 inode = 0;
s64 last_mft_rec;
MFT_REF mref;
MFT_RECORD *mrec = NULL;
struct progress_bar progress;
printf("Scanning volume ...\n");
last_mft_rec = vol->nr_mft_records - 1;
progress_init(&progress, inode, last_mft_rec, 100);
for (; inode <= last_mft_rec; inode++) {
progress_update(&progress, inode);
mref = (MFT_REF)inode;
if (ntfs_read_file_record(vol, mref, &mrec, NULL)) {
/* FIXME: continue only if it make sense, e.g.
MFT record not in use based on $MFT bitmap */
if (errno == EIO)
continue;
perr_exit("Reading inode %ld failed", inode);
}
if (!(mrec->flags & MFT_RECORD_IN_USE))
continue;
walk_attributes(mrec);
}
if (mrec)
free(mrec);
}
void advise_on_resize()
{
u64 i, old_b, new_b, g_b, old_mb, new_mb, g_mb;
for (i = vol->nr_clusters - 1; i > 0; i--)
if (ntfs_get_bit(lcn_bitmap.bm, i))
break;
i += 2; /* first free + we reserve one for the backup boot sector */
if (i >= vol->nr_clusters) {
if (opt.info)
printf("The volume end is fragmented. "
"This case is not yet supported.\n");
exit(1);
}
if (!opt.info)
printf(NERR_PREFIX "However, ");
old_b = vol->nr_clusters * vol->cluster_size;
old_mb = rounded_up_division(old_b, NTFS_MBYTE);
new_b = i * vol->cluster_size;
new_mb = rounded_up_division(new_b, NTFS_MBYTE);
g_b = (vol->nr_clusters - i) * vol->cluster_size;
g_mb = g_b / NTFS_MBYTE;
printf("You could resize at %lld bytes ", new_b);
if ((new_mb * NTFS_MBYTE) < old_b)
printf("or %lld MB ", new_mb);
printf("(gaining ");
if (g_mb && (old_mb - new_mb))
printf("%lld MB", old_mb - new_mb);
else
printf("%lld bytes", g_b);
printf(").\n");
exit(1);
}
void look_for_bad_sector(ATTR_RECORD *a)
{
run_list *rl;
int i;
rl = ntfs_decompress_mapping_pairs(vol, a, NULL);
if (!rl)
perr_exit("ntfs_decompress_mapping_pairs");
for (i = 0; rl[i].length; i++)
if (rl[i].lcn != LCN_HOLE)
err_exit("Device has bad sectors, not supported\n");
free(rl);
}
void rl_set(run_list *rl, VCN vcn, LCN lcn, s64 len)
{
rl->vcn = vcn;
rl->lcn = lcn;
rl->length = len;
}
/*
* $Bitmap can overlap the end of the volume. Any bits in this region
* must be set. This region also encompasses the backup boot sector.
*/
void bitmap_file_data_fixup(s64 cluster, struct bitmap *bm)
{
for (; cluster < bm->size << 3; cluster++)
ntfs_set_bit(bm->bm, (u64)cluster, 1);
}
/*
* FIXME: this function should go away and instead using a generalized
* "truncate_bitmap_unnamed_attr()"
*/
void truncate_badclust_bad_attr(ATTR_RECORD *a, s64 nr_clusters)
{
run_list *rl_bad;
int mp_size;
char *mp;
if (!a->non_resident)
/* FIXME: handle resident attribute value */
perr_exit("Resident attribute in $BadClust not supported!");
if (!(rl_bad = (run_list *)malloc(2 * sizeof(run_list))))
perr_exit("Couldn't get memory");
rl_set(rl_bad, 0LL, (LCN)LCN_HOLE, nr_clusters);
rl_set(rl_bad + 1, nr_clusters, -1LL, 0LL);
mp_size = ntfs_get_size_for_mapping_pairs(vol, rl_bad);
if (!(mp = (char *)calloc(1, mp_size)))
perr_exit("Couldn't get memory");
if (ntfs_build_mapping_pairs(vol, mp, mp_size, rl_bad))
exit(1);
memcpy((char *)a + a->mapping_pairs_offset, mp, mp_size);
a->highest_vcn = cpu_to_le64(nr_clusters - 1LL);
a->allocated_size = cpu_to_le64(nr_clusters * vol->cluster_size);
a->data_size = cpu_to_le64(nr_clusters * vol->cluster_size);
free(rl_bad);
free(mp);
}
void truncate_bitmap_unnamed_attr(ATTR_RECORD *a, s64 nr_clusters)
{
run_list *rl;
s64 bm_bsize, size;
s64 nr_bm_clusters;
int i, j, mp_size;
int trunc_at = -1; /* FIXME: -1 means unset */
char *mp;
if (!a->non_resident)
/* FIXME: handle resident attribute value */
perr_exit("Resident data attribute in $Bitmap not supported!");
bm_bsize = nr_clusters_to_bitmap_byte_size(nr_clusters);
nr_bm_clusters = rounded_up_division(bm_bsize, vol->cluster_size);
if (!(rl = ntfs_decompress_mapping_pairs(vol, a, NULL)))
perr_exit("ntfs_decompress_mapping_pairs");
/* Unallocate truncated clusters in $Bitmap */
for (i = 0; rl[i].length; i++) {
if (rl[i].vcn + rl[i].length <= nr_bm_clusters)
continue;
if (trunc_at == -1)
trunc_at = i;
if (rl[i].lcn == LCN_HOLE || rl[i].lcn == LCN_RL_NOT_MAPPED)
continue;
for (j = 0; j < rl[i].length; j++)
if (rl[i].vcn + j >= nr_bm_clusters) {
u64 k = (u64)rl[i].lcn + j;
ntfs_set_bit(lcn_bitmap.bm, k, 0);
Dprintf("Unallocate cluster: "
"%llu (%llx)\n", k, k);
}
}
/* FIXME: realloc lcn_bitmap.bm (if it's worth the risk) */
lcn_bitmap.size = bm_bsize;
bitmap_file_data_fixup(nr_clusters, &lcn_bitmap);
if (trunc_at != -1) {
/* NOTE: 'i' always > 0 */
i = nr_bm_clusters - rl[trunc_at].vcn;
rl[trunc_at].length = i;
rl_set(rl + trunc_at + 1, nr_bm_clusters, -1LL, 0LL);
Dprintf("Runlist truncated at index %d, "
"new cluster length %d\n", trunc_at, i);
}
if (!opt.ro_flag) {
size = ntfs_rl_pwrite(vol, rl, 0, bm_bsize, lcn_bitmap.bm);
if (bm_bsize != size) {
if (size == -1)
perr_exit("Couldn't write $Bitmap");
printf("Couldn't write full $Bitmap file "
"(%lld from %lld)\n", size, bm_bsize);
exit(1);
}
}
mp_size = ntfs_get_size_for_mapping_pairs(vol, rl);
if (!(mp = (char *)calloc(1, mp_size)))
perr_exit("Couldn't get memory");
if (ntfs_build_mapping_pairs(vol, mp, mp_size, rl))
exit(1);
memcpy((char *)a + a->mapping_pairs_offset, mp, mp_size);
a->highest_vcn = cpu_to_le64(nr_bm_clusters - 1LL);
a->allocated_size = cpu_to_le64(nr_bm_clusters * vol->cluster_size);
a->data_size = cpu_to_le64(bm_bsize);
a->initialized_size = cpu_to_le64(bm_bsize);
free(rl);
free(mp);
}
void lookup_data_attr(MFT_REF mref, char *aname, ntfs_attr_search_ctx **ctx)
{
ntfs_inode *ni;
uchar_t *ustr = NULL;
int len = 0;
if (!(ni = ntfs_open_inode(vol, mref)))
perr_exit("ntfs_open_inode");
if (NInoAttrList(ni))
perr_exit("Attribute list attribute not yet supported");
if (!(*ctx = ntfs_get_attr_search_ctx(ni, NULL)))
perr_exit("ntfs_get_attr_search_ctx");
if (aname && ((len = ntfs_mbstoucs(aname, &ustr, 0)) == -1))
perr_exit("Unable to convert string to Unicode");
if (!ustr || !len) {
ustr = AT_UNNAMED;
len = 0;
}
if (ntfs_lookup_attr(AT_DATA, ustr, len, 0, 0, NULL, 0, *ctx))
perr_exit("ntfs_lookup_attr");
if (ustr != AT_UNNAMED)
free(ustr);
}
int write_mft_record(ntfs_attr_search_ctx *ctx)
{
if (opt.ro_flag)
return 0;
return ntfs_write_mft_record(vol, ctx->ntfs_ino->mft_no, ctx->mrec);
}
void truncate_badclust_file(s64 nr_clusters)
{
ntfs_attr_search_ctx *ctx = NULL;
printf("Updating $BadClust file ...\n");
lookup_data_attr((MFT_REF)FILE_BadClus, "$Bad", &ctx);
look_for_bad_sector(ctx->attr);
/* FIXME: sanity_check_attr(ctx->attr); */
/* FIXME: should use an "extended" truncate_bitmap_unnamed_attr() */
truncate_badclust_bad_attr(ctx->attr, nr_clusters);
if (write_mft_record(ctx))
perr_exit("Couldn't update $BadClust");
/* FIXME: clean up API => ntfs_put_attr_search_ctx() also closes ni */
ntfs_put_attr_search_ctx(ctx);
}
void truncate_bitmap_file(s64 nr_clusters)
{
ntfs_attr_search_ctx *ctx = NULL;
printf("Updating $Bitmap file ...\n");
lookup_data_attr((MFT_REF)FILE_Bitmap, NULL, &ctx);
/* FIXME: sanity_check_attr(ctx->attr); */
truncate_bitmap_unnamed_attr(ctx->attr, nr_clusters);
if (write_mft_record(ctx))
perr_exit("Couldn't update $Bitmap");
ntfs_put_attr_search_ctx(ctx);
}
void setup_lcn_bitmap()
{
/* 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);
}
/* FIXME: should be done using ntfs_* functions */
void update_bootsector(s64 nr_clusters)
{
NTFS_BOOT_SECTOR bs;
printf("Updating Boot record ...\n");
if (lseek(vol->fd, 0, SEEK_SET) == (off_t)-1)
perr_exit("lseek");
if (read(vol->fd, &bs, sizeof(NTFS_BOOT_SECTOR)) == -1)
perr_exit("read() error");
bs.number_of_sectors = nr_clusters * bs.bpb.sectors_per_cluster;
bs.number_of_sectors = cpu_to_le64(bs.number_of_sectors);
if (lseek(vol->fd, 0, SEEK_SET) == (off_t)-1)
perr_exit("lseek");
if (!opt.ro_flag)
if (write(vol->fd, &bs, sizeof(NTFS_BOOT_SECTOR)) == -1)
perr_exit("write() error");
}
void print_volume_size(char *str, ntfs_volume *v, s64 nr_clusters)
{
s64 b; /* volume size in bytes */
b = nr_clusters * v->cluster_size;
printf("%s: %lld bytes (%lld MB)\n",
str, b, rounded_up_division(b, NTFS_MBYTE));
}
void mount_volume()
{
unsigned long mntflag;
if (ntfs_check_if_mounted(opt.volume, &mntflag))
perr_exit("Failed to check '%s' mount state", opt.volume);
if (mntflag & NTFS_MF_MOUNTED) {
if (!(mntflag & NTFS_MF_READONLY))
err_exit("Device %s is mounted read-write. "
"You must umount it first.\n", opt.volume);
if (!opt.ro_flag)
err_exit("Device %s is mounted. "
"You must umount it first.\n", opt.volume);
}
if (!(vol = ntfs_mount(opt.volume, opt.ro_flag))) {
int err = errno;
perr_printf("ntfs_mount failed");
if (errno == 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/hda8)?\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");
printf("NTFS volume version: %d.%d\n", vol->major_ver, vol->minor_ver);
if (ntfs_is_version_supported(vol))
perr_exit("Unknown NTFS version");
Dprintf("Cluster size : %u\n", vol->cluster_size);
print_volume_size("Current volume size", vol, vol->nr_clusters);
}
void prepare_volume_fixup()
{
if (!opt.ro_flag) {
u16 flags;
flags = vol->flags | VOLUME_IS_DIRTY;
if (vol->major_ver >= 2)
flags |= VOLUME_MOUNTED_ON_NT4;
printf("Schedule chkdsk NTFS consistency check at Windows boot time ...\n");
if (ntfs_set_volume_flags(vol, flags))
perr_exit("Failed to set $Volume dirty");
printf("Resetting $LogFile ... "
"(this might take a while)\n");
if (ntfs_reset_logfile(vol))
perr_exit("Failed to reset $LogFile");
}
}
int main(int argc, char **argv)
{
struct bitmap on_disk_lcn_bitmap;
s64 new_volume_size = 0; /* in clusters */
int i;
parse_options(argc, argv);
mount_volume();
if (opt.bytes) {
/* Take the integer part: when shrinking we don't want
to make the volume to be bigger than requested.
Later on we will also decrease this value to save
room for the backup boot sector */
new_volume_size = opt.bytes / vol->cluster_size;
print_volume_size("New volume size ", vol, new_volume_size);
}
setup_lcn_bitmap();
walk_inodes();
get_bitmap_data(vol, &on_disk_lcn_bitmap);
compare_bitmaps(&on_disk_lcn_bitmap, &lcn_bitmap);
free(on_disk_lcn_bitmap.bm);
if (opt.info)
advise_on_resize();
/* FIXME: check new_volume_size validity */
/* Backup boot sector at the end of device isn't counted in NTFS
volume size thus we have to reserve space for. We don't trust
the user does this for us: better to be on the safe side ;) */
if (new_volume_size)
--new_volume_size;
if (new_volume_size > vol->nr_clusters)
err_exit("Volume enlargement not yet supported\n");
else if (new_volume_size == vol->nr_clusters) {
printf("Nothing to do: NTFS volume size is already OK.\n");
exit(0);
}
for (i = new_volume_size; i < vol->nr_clusters; i++)
if (ntfs_get_bit(lcn_bitmap.bm, (u64)i)) {
/* FIXME: relocate cluster */
printf(NERR_PREFIX "Fragmented volume not yet "
"supported. Defragment it before resize.\n");
advise_on_resize();
}
if (opt.force-- <= 0 && !opt.ro_flag) {
printf(NTFS_RESIZE_WARNING);
proceed_question();
}
prepare_volume_fixup();
truncate_badclust_file(new_volume_size);
truncate_bitmap_file(new_volume_size);
update_bootsector(new_volume_size);
/* We don't create backup boot sector because we don't know where the
partition will be split. The scheduled chkdsk will fix it anyway */
if (opt.ro_flag) {
printf("The read-only test run ended successfully.\n");
exit(0);
}
printf("Syncing device ...\n");
if (fsync(vol->fd) == -1)
perr_exit("fsync");
printf(NTFS_RESIZE_IMPORTANT, vol->dev_name);
return 0;
}
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