ntfs-3g/ntfsprogs/ntfsmove.c

/**
 * ntfsmove - Part of the Linux-NTFS project.
 *
 * Copyright (c) 2003 Richard Russon
 * Copyright (c) 2003 Anton Altaparmakov
 *
 * This utility will move files on 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 <stdio.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>

#include "types.h"
#include "attrib.h"
#include "utils.h"
#include "volume.h"
#include "debug.h"
#include "dir.h"
#include "bitmap.h"
#include "ntfsmove.h"

static const char *EXEC_NAME = "ntfsmove";
static struct options opts;

GEN_PRINTF (Eprintf, stderr, NULL,          FALSE)
GEN_PRINTF (Vprintf, stdout, &opts.verbose, TRUE)
GEN_PRINTF (Qprintf, stdout, &opts.quiet,   FALSE)

#define RED	""
#define YELLOW	""
#define GREEN	""
#define NORM	""

/**
 * version - Print version information about the program
 *
 * Print a copyright statement and a brief description of the program.
 *
 * Return:  none
 */
static void version (void)
{
	printf ("\n%s v%s - Move files and directories on an NTFS volume.\n\n",
		EXEC_NAME, VERSION);
	printf ("Copyright (c) 2003 Richard Russon\n");
	printf ("\n%s\n%s%s\n", ntfs_gpl, ntfs_bugs, ntfs_home);
}

/**
 * usage - Print a list of the parameters to the program
 *
 * Print a list of the parameters and options for the program.
 *
 * Return:  none
 */
static void usage (void)
{
	printf ("\nUsage: %s [options] device file\n"
		"\n"
		"    -S      --start        Move to the start of the volume\n"
		"    -B      --best         Move to the best place on the volume\n"
		"    -E      --end          Move to the end of the volume\n"
		"    -C num  --cluster num  Move to this cluster offset\n"
		"\n"
		"    -D      --no-dirty     Do not mark volume dirty (require chkdsk)\n"
		"    -n      --no-action    Do not write to disk\n"
		"    -f      --force        Use less caution\n"
		"    -h      --help         Print this help\n"
		"    -q      --quiet        Less output\n"
		"    -V      --version      Version information\n"
		"    -v      --verbose      More output\n\n",
		EXEC_NAME);
	printf ("%s%s\n", ntfs_bugs, ntfs_home);
}

/**
 * parse_options - Read and validate the programs command line
 *
 * Read the command line, verify the syntax and parse the options.
 * This function is very long, but quite simple.
 *
 * Return:  1 Success
 *	    0 Error, one or more problems
 */
static int parse_options (int argc, char **argv)
{
	static const char *sopt = "-BC:DEfh?nqSVv";
	static const struct option lopt[] = {
		{ "best",	no_argument,		NULL, 'B' },
		{ "cluster",	required_argument,	NULL, 'C' },
		{ "end",	no_argument,		NULL, 'E' },
		{ "force",	no_argument,		NULL, 'f' },
		{ "help",	no_argument,		NULL, 'h' },
		{ "no-action",	no_argument,		NULL, 'n' },
		{ "no-dirty",	no_argument,		NULL, 'D' },
		{ "quiet",	no_argument,		NULL, 'q' },
		{ "start",	no_argument,		NULL, 'S' },
		{ "verbose",	no_argument,		NULL, 'v' },
		{ "version",	no_argument,		NULL, 'V' },
		{ NULL,		0,			NULL, 0   }
	};

	char c = -1;
	int err  = 0;
	int ver  = 0;
	int help = 0;
	char *end = NULL;

	opterr = 0; /* We'll handle the errors, thank you. */

	while ((c = getopt_long (argc, argv, sopt, lopt, NULL)) != -1) {
		switch (c) {
		case 1:	/* A non-option argument */
			if (!opts.device) {
				opts.device = argv[optind-1];
			} else if (!opts.file) {
				opts.file = argv[optind-1];
			} else {
				opts.device = NULL;
				opts.file   = NULL;
				err++;
			}
			break;
		case 'B':
			if (opts.location == 0)
				opts.location = NTFS_MOVE_LOC_BEST;
			else
				opts.location = -1;
			break;
		case 'C':
			if (opts.location == 0) {
				opts.location = strtoll (optarg, &end, 0);
				if (end && *end)
					err++;
			} else {
				opts.location = -1;
			}
			break;
		case 'D':
			opts.nodirty++;
			break;
		case 'E':
			if (opts.location == 0)
				opts.location = NTFS_MOVE_LOC_END;
			else
				opts.location = -1;
			break;
		case 'f':
			opts.force++;
			break;
		case 'h':
		case '?':
			help++;
			break;
		case 'n':
			opts.noaction++;
			break;
		case 'q':
			opts.quiet++;
			break;
		case 'S':
			if (opts.location == 0)
				opts.location = NTFS_MOVE_LOC_START;
			else
				opts.location = -1;
			break;
		case 'V':
			ver++;
			break;
		case 'v':
			opts.verbose++;
			break;
		default:
			Eprintf ("Unknown option '%s'.\n", argv[optind-1]);
			err++;
			break;
		}
	}

	if (help || ver) {
		opts.quiet = 0;
	} else {
		if ((opts.device == NULL) ||
		    (opts.file   == NULL)) {
			if (argc > 1)
				Eprintf ("You must specify one device and one file.\n");
			err++;
		}

		if (opts.quiet && opts.verbose) {
			Eprintf("You may not use --quiet and --verbose at the "
					"same time.\n");
			err++;
		}

		if (opts.location == -1) {
			Eprintf ("You may only specify one location option: "
				"--start, --best, --end or --cluster\n");
			err++;
		} else if (opts.location == 0) {
			opts.location = NTFS_MOVE_LOC_BEST;
		}
	}

	if (ver)
		version();
	if (help || err)
		usage();

	return (!err && !help && !ver);
}

#if 0

/**
 * ntfs_debug_runlist_dump2 - Dump a runlist.
 */
static int ntfs_debug_runlist_dump2 (const runlist *rl, int abbr, char *prefix)
{
	//int abbr = 3;	/* abbreviate long lists */
	int len = 0;
	int i;
	int res = 0;
	u64 total = 0;
	const char *lcn_str[5] = { "HOLE", "NOTMAP", "ENOENT", "EINVAL", "XXXX" };

	if (!rl) {
		printf("    Run list not present.\n");
		return 0;
	}

	if (!prefix)
		prefix = "";

	if (abbr)
		for (len = 0; rl[len].length; len++) ;

	printf("%s     VCN      LCN      len\n", prefix);
	for (i = 0; rl->length; i++, rl++) {
		LCN lcn = rl->lcn;

		total += rl->length;
		if (abbr)
			if (len > 20) {
				if ((i == abbr) && (len > (abbr*2)))
					printf ("%s     ...      ...      ...\n", prefix);
				if ((i > (abbr-1)) && (i < (len - (abbr-1))))
					continue;
			}

		if (rl->vcn < -1)
			res = -1;

		if (lcn < (LCN)0) {
			int j = -lcn - 1;

			if ((j < 0) || (j > 4)) {
				j = 4;
				res = -1;
			}
			printf("%s%8lld %8s %8lld\n", prefix,
				rl->vcn, lcn_str[j], rl->length);
		} else
			printf("%s%8lld %8lld %8lld\n", prefix,
				rl->vcn, rl->lcn, rl->length);
	}
	printf ("%s                  --------\n", prefix);
	printf ("%s                  %8lld\n", prefix, total);
	printf ("\n");
	return res;
}

#endif /* if 0 */

/**
 * resize_nonres_attr
 */
static int resize_nonres_attr (MFT_RECORD *m, ATTR_RECORD *a, const u32 new_size)
{
	int this_attr;
	int next_attr;
	int tail_size;
	int file_size;
	int old_size;
	u8 *ptr;

	old_size  = a->length;
	file_size = m->bytes_in_use;
	this_attr = p2n(a)-p2n(m);
	next_attr = this_attr + a->length;
	tail_size = file_size - next_attr;
	ptr = (u8*) m;

	/*
	printf ("old_size  = %d\n", old_size);
	printf ("new_size  = %d\n", new_size);
	printf ("file_size = %d\n", file_size);
	printf ("this_attr = %d\n", this_attr);
	printf ("next_attr = %d\n", next_attr);
	printf ("tail_size = %d\n", tail_size);
	*/

	memmove (ptr + this_attr + new_size, ptr + next_attr, tail_size);

	a->length = new_size;
	m->bytes_in_use += new_size - old_size;

	return 0;
}

/**
 * calc_attr_length
 */
static int calc_attr_length (ATTR_RECORD *rec, int runlength)
{
	int size;

	if (!rec)
		return -1;
	if (!rec->non_resident)
		return -1;

	size = rec->mapping_pairs_offset + runlength + 7;
	size &= 0xFFF8;
	return size;
}

#if 0

/**
 * dump_runs
 */
static void dump_runs (u8 *buffer, int len)
{
	int i;
	printf ("RUN: ");

	for (i = 0; i < len; i++) {
		printf (" %02x", buffer[i]);
	}
	printf ("\n");
}

#endif /* if 0 */

/**
 * find_unused
 */
static runlist * find_unused (ntfs_volume *vol, s64 size, u64 loc, int flags)
{
	const int bufsize = 8192;
	u8 *buffer;
	int clus;
	int i;
	int curr = 0;
	int count = 0;
	s64 start = 0;
	int bit = 0;
	runlist *res = NULL;

	//printf ("find_unused\n");
	buffer = malloc (bufsize);
	if (!buffer) {
		printf ("!buffer\n");
		return NULL;
	}

	//printf ("looking for space for %lld clusters\n", size);

	clus = vol->lcnbmp_na->allocated_size / bufsize;
	//printf ("clus = %d\n", clus);

	for (i = 0; i < clus; i++) {
		int bytes_read, j;

		bytes_read = ntfs_attr_pread (vol->lcnbmp_na, i*bufsize,
				bufsize, buffer);
		if (bytes_read != bufsize) {
			printf ("!read\n");
			return NULL;
		}
		for (j = 0; j < bufsize*8; j++) {
			bit = !!test_bit (j & 7, buffer[j>>3]);
			if (curr == bit) {
				count++;
				if ((!bit) && (count >= size)) {
					//res = calloc (2, sizeof (*res));
					res = calloc (1, 4096);
					if (res) {
						res[0].vcn    = 0;
						res[0].lcn    = start;
						res[0].length = size;
						res[1].lcn    = LCN_ENOENT;
					}
					goto done;
				}
			} else {
				//printf ("%d * %d\n", curr, count);
				curr = bit;
				count = 1;
				start = i*bufsize*8 + j;
			}
		}
	}
done:
	//printf ("%d * %d\n", curr, count);

	free (buffer);

	if (res) {
		for (i = 0; i < size; i++) {
			if (utils_cluster_in_use (vol, res->lcn + i)) {
				printf ("ERROR cluster %lld in use\n", res->lcn + i);
			}
		}
	} else {
		printf ("failed\n");
	}

	return res;
}

/**
 * dont_move
 *
 * Don't let the user move:
 *   ANY metadata
 *   Any fragmented MFT records
 *   The boot file 'ntldr'
 */
static int dont_move (ntfs_inode *ino)
{
	static const ntfschar ntldr[6] = {
		const_cpu_to_le16('n'), const_cpu_to_le16('t'), const_cpu_to_le16('l'),
		const_cpu_to_le16('d'), const_cpu_to_le16('r'), const_cpu_to_le16('\0')
	};

	ATTR_RECORD *rec;
	FILE_NAME_ATTR *name;

	if (utils_is_metadata (ino)) {
		Eprintf ("metadata\n");
		return 1;
	}

	rec = find_first_attribute (AT_ATTRIBUTE_LIST, ino->mrec);
	if (rec) {
		Eprintf ("attribute list\n");
		return 1;
	}

	rec = find_first_attribute (AT_FILE_NAME, ino->mrec);
	if (!rec) {
		Eprintf ("extend inode\n");
		return 1;
	}

	name = (FILE_NAME_ATTR*) ((u8*)rec + rec->value_offset);
	if (ntfs_names_are_equal (ntldr, 5, name->file_name, name->file_name_length,
		IGNORE_CASE, ino->vol->upcase, ino->vol->upcase_len)) {
		Eprintf ("ntldr\n");
		return 1;
	}

	return 0;
}


/**
 * bitmap_alloc
 */
static int bitmap_alloc (ntfs_volume *vol, runlist_element *rl)
{
	int res;

	if (!rl)
		return -1;

	res = ntfs_bitmap_set_run (vol->lcnbmp_na, rl->lcn, rl->length);
	if (res < 0) {
		Eprintf ("bitmap alloc returns %d\n", res);
	}

	return res;
}

/**
 * bitmap_free
 */
static int bitmap_free (ntfs_volume *vol, runlist_element *rl)
{
	int res;

	if (!rl)
		return -1;

	res = ntfs_bitmap_clear_run (vol->lcnbmp_na, rl->lcn, rl->length);
	if (res < 0) {
		Eprintf ("bitmap free returns %d\n", res);
	}

	return res;
}

/**
 * data_copy
 */
static int data_copy (ntfs_volume *vol, runlist_element *from, runlist_element *to)
{
	int i;
	u8 *buffer;
	s64 res = 0;

	if (!vol || !from || !to)
		return -1;
	if ((from->length != to->length) || (from->lcn < 0) || (to->lcn < 0))
		return -1;

	//printf ("data_copy: from 0x%llx to 0x%llx\n", from->lcn, to->lcn);
	buffer = malloc (vol->cluster_size);
	if (!buffer) {
		printf ("!buffer\n");
		return -1;
	}

	for (i = 0; i < from->length; i++) {
		//printf ("read  cluster at %8lld\n", from->lcn+i);
		res = ntfs_pread (vol->dev, (from->lcn+i) * vol->cluster_size, vol->cluster_size, buffer);
		if (res != vol->cluster_size) {
			Eprintf ("!read\n");
			res = -1;
			break;
		}

		//printf ("write cluster to %8lld\n", to->lcn+i);
		res = ntfs_pwrite (vol->dev, (to->lcn+i) * vol->cluster_size, vol->cluster_size, buffer);
		if (res != vol->cluster_size) {
			Eprintf ("!write %lld\n", res);
			res = -1;
			break;
		}
	}

	free (buffer);
	return res;
}

/**
 * move_runlist
 *
 * validate:
 *   runlists are the same size
 *   from in use
 *   to not in use
 * allocate new space
 * copy data
 * deallocate old space
 */
static s64 move_runlist (ntfs_volume *vol, runlist_element *from,
	runlist_element *to)
{
	int i;

	if (!vol || !from || !to)
		return -1;
	if (from->length != to->length) {
		Eprintf ("diffsizes\n");
		return -1;
	}

	if ((from->lcn < 0) || (to->lcn < 0)) {
		Eprintf ("invalid runs\n");
		return -1;
	}

	for (i = 0; i < from->length; i++) {
		if (!utils_cluster_in_use (vol, from->lcn+i)) {
			Eprintf ("from not in use\n");
			return -1;
		}
	}

	for (i = 0; i < to->length; i++) {
		if (utils_cluster_in_use (vol, to->lcn+i)) {
			Eprintf ("to is in use\n");
			return -1;
		}
	}

	if (bitmap_alloc (vol, to) < 0) {
		Eprintf ("cannot bitmap_alloc\n");
		return -1;
	}

	if (data_copy (vol, from, to) < 0) {
		Eprintf ("cannot data_copy\n");
		return -1;
	}

	if (bitmap_free (vol, from) < 0) {
		Eprintf ("cannot bitmap_free\n");
		return -1;
	}

	return 0;
}


/**original
 * move_datarun
 * > 0  Bytes moved / size to be moved
 * = 0  Nothing to do
 * < 0  Error
 */

// get size of runlist
// find somewhere to put data
// backup original runlist
// move the data

// got to get the runlist out of this function
//      requires a mrec arg, not an ino (ino->mrec will do for now)
// check size of new runlist before allocting / moving
// replace one datarun with another (by hand)
static s64 move_datarun (ntfs_volume *vol, ntfs_inode *ino, ATTR_RECORD *rec,
	runlist_element *run, u64 loc, int flags)
{
	runlist *from;
	runlist *to;
	int need_from;
	int need_to;
	int i;
	s64 res = -1;

	// find empty space
	to = find_unused (vol, run->length, loc, flags);
	if (!to) {
		Eprintf ("!to\n");
		return -1;
	}

	to->vcn = run->vcn;

	// copy original runlist
	from = ntfs_mapping_pairs_decompress (vol, rec, NULL);
	if (!from) {
		printf ("!from\n");
		return -1;
	}

	printf ("move %lld,%lld,%lld to %lld,%lld,%lld\n", run->vcn, run->lcn, run->length, to->vcn, to->lcn, to->length);

	need_from = ntfs_get_size_for_mapping_pairs(vol, from, 0);
	printf ("orig data run = %d bytes\n", need_from);

	//ntfs_debug_runlist_dump2 (from, 5, "\t");

	for (i = 0; to[i].length > 0; i++) {
		if (from[i].vcn == run->vcn) {
			from[i].lcn = to->lcn;
			break;
		}
	}

	//ntfs_debug_runlist_dump2 (from, 5, "\t");

	need_to = ntfs_get_size_for_mapping_pairs(vol, from, 0);
	printf ("new  data run = %d bytes\n", need_to);

	need_from = calc_attr_length (rec, need_from);
	need_to   = calc_attr_length (rec, need_to);

	printf (RED "Before %d, after %d\n" NORM, need_from, need_to);

	if (need_from != need_to) {
		if (resize_nonres_attr (ino->mrec, rec, need_to) < 0) {
			printf ("!resize\n");
			return -1;
		}
	}

	res = move_runlist (vol, run, to);
	if (res < 0) {
		Eprintf ("!move_runlist\n");
		return -1;
	}
	
	// wipe orig runs
	memset (((u8*)rec) +rec->mapping_pairs_offset, 0, need_to - rec->mapping_pairs_offset);

	// update data runs
	ntfs_mapping_pairs_build(vol, ((u8*)rec) + rec->mapping_pairs_offset,
			need_to, from, 0, NULL);

	// commit
	ntfs_inode_mark_dirty (ino);

	if (ntfs_inode_sync (ino) < 0) {
		printf ("!sync\n");
		return -1;
	}

	free (from);
	free (to);
	return res;
}

/**
 * move_attribute
 * > 0  Bytes moved / size to be moved
 * = 0  Nothing to do
 * < 0  Error
 */
static s64 move_attribute (ntfs_volume *vol, ntfs_inode *ino, ATTR_RECORD *rec,
	u64 loc, int flags)
{
	int i;
	s64 res;
	s64 count = 0;
	runlist *runs;

	// NTFS_MOVE_LOC_BEST : assess how much space this attribute will need,
	// find that space and pass the location to our children.
	// Anything else we pass directly to move_datarun.

	runs = ntfs_mapping_pairs_decompress (vol, rec, NULL);
	if (!runs) {
		Eprintf ("!runs\n");
		return -1;
	}

	//ntfs_debug_runlist_dump2 (runs, 5, "\t");

	//printf ("             VCN     LCN     Length\n");
	for (i = 0; runs[i].length > 0; i++) {
		if (runs[i].lcn == LCN_RL_NOT_MAPPED) {
			continue;
		}

		res = move_datarun (vol, ino, rec, runs+i, loc, flags);
		//printf ("        %8lld %8lld %8lld\n", runs[i].vcn, runs[i].lcn, runs[i].length);
		if (res < 0) {
			Eprintf ("!move_datarun\n");
			count = res;
			break;
		}
		count += res;
	}

	return count;
}

/**
 * move_file
 * > 0  Bytes moved / size to be moved
 * = 0  Nothing to do
 * < 0  Error
 */
static s64 move_file (ntfs_volume *vol, ntfs_inode *ino, u64 loc, int flags)
{
	char *buffer;
	ntfs_attr_search_ctx *ctx;
	ATTR_RECORD *rec;
	s64 res;
	s64 count = 0;

	buffer = malloc (MAX_PATH);
	if (!buffer) {
		Eprintf ("Out of memory\n");
		return -1;
	}

	utils_inode_get_name (ino, buffer, MAX_PATH);

	if (dont_move (ino)) {
		Eprintf ("can't move\n");
		return -1;
	}

	printf ("Moving %s\n", buffer);

	// NTFS_MOVE_LOC_BEST : assess how much space all the attributes will need,
	// find that space and pass the location to our children.
	// Anything else we pass directly to move_attribute.

	ctx = ntfs_attr_get_search_ctx (ino, NULL);

	while ((rec = find_attribute (AT_UNUSED, ctx))) {
		utils_attr_get_name (vol, rec, buffer, MAX_PATH);
		printf ("\tAttribute 0x%02x %s is ", rec->type, buffer);

		if (rec->non_resident) {
			printf ("non-resident.   Moving it.\n");

			res = move_attribute (vol, ino, rec, loc, flags);
			if (res < 0) {
				count = res;
				break;
			}
			count += res;
		} else {
			printf ("resident.\n\t\tSkipping it.\n");
		}
	}

	ntfs_attr_put_search_ctx (ctx);
	free (buffer);
	return count;
}


/**
 * main - Begin here
 *
 * Start from here.
 *
 * Return:  0  Success, the program worked
 *	    1  Error, something went wrong
 */
int main (int argc, char *argv[])
{
	ntfs_volume *vol;
	ntfs_inode *inode;
	int flags = 0;
	int result = 1;
	s64 count;

	if (!parse_options (argc, argv))
		return 1;

	utils_set_locale();

	if (opts.noaction)
		flags |= MS_RDONLY;

	vol = utils_mount_volume (opts.device, flags, opts.force);
	if (!vol) {
		printf ("!vol\n");
		return 1;
	}

	inode = utils_pathname_to_inode (vol, NULL, opts.file);
	if (!inode) {
		printf ("!inode\n");
		return 1;
	}

	count = move_file (vol, inode, opts.location, 0);
	if ((count > 0) && (!opts.nodirty)) {
		if (ntfs_volume_set_flags (vol, VOLUME_IS_DIRTY) < 0) {
			Eprintf ("Couldn't mark volume dirty\n");
		}
		printf ("Relocated %lld bytes\n", count);
	}
	if (count >= 0)
		result = 0;

	if (result)
		printf ("failed\n");
	else
		printf ("success\n");

	ntfs_inode_close (inode);
	ntfs_umount (vol, FALSE);
	return result;
}