[thirdparty/e2fsprogs.git] / resize / main.c

/*
 * main.c --- ext2 resizer main program
 *
 * Copyright (C) 1997, 1998 by Theodore Ts'o and
 * 	PowerQuest, Inc.
 *
 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o
 * 
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE

#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "e2p/e2p.h"

#include "resize2fs.h"

#include "../version.h"

char *program_name, *device_name, *io_options;

static void usage (char *prog)
{
	fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-p] "
			   "device [new_size]\n\n"), prog);

	exit (1);
}

static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
				      unsigned long cur, unsigned long max)
{
	ext2_sim_progmeter progress;
	const char	*label;
	errcode_t	retval;

	progress = (ext2_sim_progmeter) rfs->prog_data;
	if (max == 0)
		return 0;
	if (cur == 0) {
		if (progress)
			ext2fs_progress_close(progress);
		progress = 0;
		switch (pass) {
		case E2_RSZ_EXTEND_ITABLE_PASS:
			label = _("Extending the inode table");
			break;
		case E2_RSZ_BLOCK_RELOC_PASS:
			label = _("Relocating blocks");
			break;
		case E2_RSZ_INODE_SCAN_PASS:
			label = _("Scanning inode table");
			break;
		case E2_RSZ_INODE_REF_UPD_PASS:
			label = _("Updating inode references");
			break;
		case E2_RSZ_MOVE_ITABLE_PASS:
			label = _("Moving inode table");
			break;
		default:
			label = _("Unknown pass?!?");
			break;
		}
		printf(_("Begin pass %d (max = %lu)\n"), pass, max);
		retval = ext2fs_progress_init(&progress, label, 30,
					      40, max, 0);
		if (retval)
			progress = 0;
		rfs->prog_data = (void *) progress;
	}
	if (progress)
		ext2fs_progress_update(progress, cur);
	if (cur >= max) {
		if (progress)
			ext2fs_progress_close(progress);
		progress = 0;
		rfs->prog_data = 0;
	}
	return 0;
}

static void determine_fs_stride(ext2_filsys fs)
{
	unsigned int	group;
	unsigned long long sum;
	unsigned int	has_sb, prev_has_sb, num;
	int		i_stride, b_stride;

	num = 0; sum = 0;
	for (group = 0; group < fs->group_desc_count; group++) {
		has_sb = ext2fs_bg_has_super(fs, group);
		if (group == 0 || has_sb != prev_has_sb)
			goto next;
		b_stride = fs->group_desc[group].bg_block_bitmap - 
			fs->group_desc[group-1].bg_block_bitmap - 
			fs->super->s_blocks_per_group;
		i_stride = fs->group_desc[group].bg_inode_bitmap - 
			fs->group_desc[group-1].bg_inode_bitmap - 
			fs->super->s_blocks_per_group;
		if (b_stride != i_stride ||
		    b_stride < 0)
			goto next;

		/* printf("group %d has stride %d\n", group, b_stride); */
		sum += b_stride;
		num++;
			
	next:
		prev_has_sb = has_sb;
	}

	if (fs->group_desc_count > 12 && num < 3)
		sum = 0;

	if (num)
		fs->stride = sum / num;
	else
		fs->stride = 0;

#if 0
	if (fs->stride)
		printf("Using RAID stride of %d\n", fs->stride);
#endif
}

int main (int argc, char ** argv)
{
	errcode_t	retval;
	ext2_filsys	fs;
	int		c;
	int		flags = 0;
	int		flush = 0;
	int		force = 0;
	int		io_flags = 0;
	int		fd, ret;
	blk_t		new_size = 0;
	blk_t		max_size = 0;
	io_manager	io_ptr;
	char		*new_size_str = 0;
	int		use_stride = -1;
#ifdef HAVE_FSTAT64
	struct stat64	st_buf;
#else
	struct stat	st_buf;
#endif
	__s64		new_file_size;
	unsigned int	sys_page_size = 4096;
	long		sysval;
	int		len, mount_flags;
	char		*mtpt;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
#endif

	add_error_table(&et_ext2_error_table);

	fprintf (stderr, "resize2fs %s (%s)\n",
		 E2FSPROGS_VERSION, E2FSPROGS_DATE);
	if (argc && *argv)
		program_name = *argv;

	while ((c = getopt (argc, argv, "d:fFhpS:")) != EOF) {
		switch (c) {
		case 'h':
			usage(program_name);
			break;
		case 'f':
			force = 1;
			break;
		case 'F':
			flush = 1;
			break;
		case 'd':
			flags |= atoi(optarg);
			break;
		case 'p':
			flags |= RESIZE_PERCENT_COMPLETE;
			break;
		case 'S':
			use_stride = atoi(optarg);
			break;
		default:
			usage(program_name);
		}
	}
	if (optind == argc)
		usage(program_name);

	device_name = argv[optind++];
	if (optind < argc)
		new_size_str = argv[optind++];
	if (optind < argc)
		usage(program_name);
	
	io_options = strchr(device_name, '?');
	if (io_options)
		*io_options++ = 0;

	/*
	 * Figure out whether or not the device is mounted, and if it is
	 * where it is mounted.
	 */
	len=80;
	while (1) {
		mtpt = malloc(len);
		if (!mtpt)
			return ENOMEM;
		mtpt[len-1] = 0;
		retval = ext2fs_check_mount_point(device_name, &mount_flags, 
						  mtpt, len);
		if (retval) {
			com_err("ext2fs_check_mount_point", retval,
				_("while determining whether %s is mounted."),
				device_name);
			exit(1);
		}
		if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
			break;
		free(mtpt);
		len = 2 * len;
	}

#ifdef HAVE_OPEN64
	fd = open64(device_name, O_RDWR);
#else
	fd = open(device_name, O_RDWR);
#endif
	if (fd < 0) {
		com_err("open", errno, _("while opening %s"),
			device_name);
		exit(1);
	}

#ifdef HAVE_FSTAT64
	ret = fstat64(fd, &st_buf);
#else
	ret = fstat(fd, &st_buf);
#endif
	if (ret < 0) {
		com_err("open", errno, 
			_("while getting stat information for %s"),
			device_name);
		exit(1);
	}
	
	if (flush) {
		retval = ext2fs_sync_device(fd, 1);
		if (retval) {
			com_err(argv[0], retval, 
				_("while trying to flush %s"),
				device_name);
			exit(1);
		}
	}

	if (!S_ISREG(st_buf.st_mode )) {
		close(fd);
		fd = -1;
	}

	if (flags & RESIZE_DEBUG_IO) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else 
		io_ptr = unix_io_manager;

	if (!(mount_flags & EXT2_MF_MOUNTED))
		io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
	retval = ext2fs_open2(device_name, io_options, io_flags, 
			      0, 0, io_ptr, &fs);
	if (retval) {
		com_err (program_name, retval, _("while trying to open %s"),
			 device_name);
		printf (_("Couldn't find valid filesystem superblock.\n"));
		exit (1);
	}
	/*
	 * Check for compatibility with the feature sets.  We need to
	 * be more stringent than ext2fs_open().
	 */
	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
		com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
			"(%s)", device_name);
		exit(1);
	}
	
	/* Determine the system page size if possible */
#ifdef HAVE_SYSCONF
#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
#define _SC_PAGESIZE _SC_PAGE_SIZE
#endif
#ifdef _SC_PAGESIZE
	sysval = sysconf(_SC_PAGESIZE);
	if (sysval > 0)
		sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
#endif /* HAVE_SYSCONF */

	/*
	 * Get the size of the containing partition, and use this for
	 * defaults and for making sure the new filesystem doesn't
	 * exceed the partition size.
	 */
	retval = ext2fs_get_device_size(device_name, fs->blocksize,
					&max_size);
	if (retval) {
		com_err(program_name, retval,
			_("while trying to determine filesystem size"));
		exit(1);
	}
	if (new_size_str) {
		new_size = parse_num_blocks(new_size_str, 
					    fs->super->s_log_block_size);
		if (!new_size) {
			com_err(program_name, 0, _("bad filesystem size - %s"),
				new_size_str);
			exit(1);
		}
	} else {
		new_size = max_size;
		/* Round down to an even multiple of a pagesize */
		if (sys_page_size > fs->blocksize)
			new_size &= ~((sys_page_size / fs->blocksize)-1);
	}

	if (use_stride >= 0) {
		if (use_stride >= fs->super->s_blocks_per_group) {
			com_err(program_name, 0, 
				_("Invalid stride length"));
			exit(1);
		}
		fs->stride = use_stride;
	} else
		  determine_fs_stride(fs);
	
	/*
	 * If we are resizing a plain file, and it's not big enough,
	 * automatically extend it in a sparse fashion by writing the
	 * last requested block.
	 */
	new_file_size = ((__u64) new_size) * fs->blocksize;
	if ((__u64) new_file_size > 
	    (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
		fd = -1;
	if ((new_file_size > st_buf.st_size) &&
	    (fd > 0)) {
		if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
		    (write(fd, "0", 1) == 1))
			max_size = new_size;
	}
	if (!force && (new_size > max_size)) {
		fprintf(stderr, _("The containing partition (or device)"
			" is only %u (%dk) blocks.\nYou requested a new size"
			" of %u blocks.\n\n"), max_size,
			fs->blocksize / 1024, new_size);
		exit(1);
	}
	if (new_size == fs->super->s_blocks_count) {
		fprintf(stderr, _("The filesystem is already %u blocks "
			"long.  Nothing to do!\n\n"), new_size);
		exit(0);
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		retval = online_resize_fs(fs, mtpt, &new_size, flags);
	} else {
		if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
			       (fs->super->s_state & EXT2_ERROR_FS) ||
			       ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
			fprintf(stderr, 
				_("Please run 'e2fsck -f %s' first.\n\n"),
				device_name);
			exit(1);
		}
	printf("Resizing the filesystem on %s to %u (%dk) blocks.\n",
		       device_name, new_size, fs->blocksize / 1024);
		retval = resize_fs(fs, &new_size, flags,
				   ((flags & RESIZE_PERCENT_COMPLETE) ?
				    resize_progress_func : 0));
	}
	if (retval) {
		com_err(program_name, retval, _("while trying to resize %s"),
			device_name);
		ext2fs_close (fs);
		exit(1);
	}
	printf(_("The filesystem on %s is now %u blocks long.\n\n"),
	       device_name, new_size);

	if ((st_buf.st_size > new_file_size) &&
	    (fd > 0)) {
#ifdef HAVE_FSTAT64
		ftruncate64(fd, new_file_size);
#else
		ftruncate(fd, (off_t) new_file_size);
#endif
	}
	if (fd > 0)
		close(fd);
	remove_error_table(&et_ext2_error_table);
	return (0);
}
Commit	Line	Data
24b2c7a7 TT	1	/*
	2	* main.c --- ext2 resizer main program
	3	*
0cee8a5c TT	4	* Copyright (C) 1997, 1998 by Theodore Ts'o and
	5	* PowerQuest, Inc.
	6	*
55f4cbd9	7	* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o
24b2c7a7 TT	8	*
24b2c7a7 TT	9	* %Begin-Header%
0cee8a5c TT	10	* This file may be redistributed under the terms of the GNU Public
0cee8a5c TT	11	* License.
24b2c7a7 TT	12	* %End-Header%
	13	*/
	14
fe07357f TT	15	#define _LARGEFILE_SOURCE
	16	#define _LARGEFILE64_SOURCE
	17
c762c8e6 TT	18	#ifdef HAVE_GETOPT_H
c762c8e6 TT	19	#include <getopt.h>
373b8337 TT	20	#else
	21	extern char *optarg;
	22	extern int optind;
c762c8e6	23	#endif
fe07357f TT	24	#include <unistd.h>
fe07357f TT	25	#include <sys/types.h>
116db1b5	26	#include <sys/stat.h>
fe07357f	27	#include <fcntl.h>
c762c8e6	28
55f4cbd9 TT	29	#include "e2p/e2p.h"
55f4cbd9 TT	30
24b2c7a7 TT	31	#include "resize2fs.h"
24b2c7a7 TT	32
0cee8a5c	33	#include "../version.h"
2e561e02	34
2e8ca9a2	35	char program_name, device_name, *io_options;
24b2c7a7	36
dfcdc32f	37	static void usage (char *prog)
24b2c7a7	38	{
f35fd3d5 TT	39	fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-p] "
f35fd3d5 TT	40	"device [new_size]\n\n"), prog);
2e561e02	41
24b2c7a7 TT	42	exit (1);
	43	}
	44
3b627e8d TT	45	static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
3b627e8d TT	46	unsigned long cur, unsigned long max)
63b44fbe TT	47	{
	48	ext2_sim_progmeter progress;
	49	const char *label;
	50	errcode_t retval;
	51
	52	progress = (ext2_sim_progmeter) rfs->prog_data;
f4b2a6db	53	if (max == 0)
3b627e8d	54	return 0;
63b44fbe TT	55	if (cur == 0) {
	56	if (progress)
	57	ext2fs_progress_close(progress);
	58	progress = 0;
	59	switch (pass) {
a8519a2d	60	case E2_RSZ_EXTEND_ITABLE_PASS:
a13575f4	61	label = _("Extending the inode table");
63b44fbe TT	62	break;
63b44fbe TT	63	case E2_RSZ_BLOCK_RELOC_PASS:
a13575f4	64	label = _("Relocating blocks");
63b44fbe	65	break;
a8519a2d	66	case E2_RSZ_INODE_SCAN_PASS:
a13575f4	67	label = _("Scanning inode table");
63b44fbe TT	68	break;
63b44fbe TT	69	case E2_RSZ_INODE_REF_UPD_PASS:
a13575f4	70	label = _("Updating inode references");
63b44fbe TT	71	break;
63b44fbe TT	72	case E2_RSZ_MOVE_ITABLE_PASS:
a13575f4	73	label = _("Moving inode table");
63b44fbe	74	break;
a8519a2d	75	default:
a13575f4	76	label = _("Unknown pass?!?");
a8519a2d	77	break;
63b44fbe	78	}
a13575f4	79	printf(_("Begin pass %d (max = %lu)\n"), pass, max);
63b44fbe TT	80	retval = ext2fs_progress_init(&progress, label, 30,
	81	40, max, 0);
	82	if (retval)
	83	progress = 0;
	84	rfs->prog_data = (void *) progress;
	85	}
	86	if (progress)
	87	ext2fs_progress_update(progress, cur);
	88	if (cur >= max) {
	89	if (progress)
	90	ext2fs_progress_close(progress);
	91	progress = 0;
	92	rfs->prog_data = 0;
	93	}
3b627e8d	94	return 0;
63b44fbe TT	95	}
63b44fbe TT	96
46c5490d TT	97	static void determine_fs_stride(ext2_filsys fs)
	98	{
	99	unsigned int group;
	100	unsigned long long sum;
	101	unsigned int has_sb, prev_has_sb, num;
	102	int i_stride, b_stride;
	103
	104	num = 0; sum = 0;
	105	for (group = 0; group < fs->group_desc_count; group++) {
	106	has_sb = ext2fs_bg_has_super(fs, group);
	107	if (group == 0 \|\| has_sb != prev_has_sb)
	108	goto next;
	109	b_stride = fs->group_desc[group].bg_block_bitmap -
	110	fs->group_desc[group-1].bg_block_bitmap -
	111	fs->super->s_blocks_per_group;
	112	i_stride = fs->group_desc[group].bg_inode_bitmap -
	113	fs->group_desc[group-1].bg_inode_bitmap -
	114	fs->super->s_blocks_per_group;
	115	if (b_stride != i_stride \|\|
	116	b_stride < 0)
	117	goto next;
	118
	119	/* printf("group %d has stride %d\n", group, b_stride); */
	120	sum += b_stride;
	121	num++;
	122
	123	next:
	124	prev_has_sb = has_sb;
	125	}
	126
	127	if (fs->group_desc_count > 12 && num < 3)
	128	sum = 0;
	129
	130	if (num)
	131	fs->stride = sum / num;
	132	else
	133	fs->stride = 0;
	134
	135	#if 0
	136	if (fs->stride)
	137	printf("Using RAID stride of %d\n", fs->stride);
	138	#endif
	139	}
	140
0a617317	141	int main (int argc, char ** argv)
24b2c7a7 TT	142	{
	143	errcode_t retval;
	144	ext2_filsys fs;
	145	int c;
05e112a1	146	int flags = 0;
c762c8e6	147	int flush = 0;
f4b2a6db	148	int force = 0;
5d2ef12f	149	int io_flags = 0;
fe07357f	150	int fd, ret;
f4b2a6db TT	151	blk_t new_size = 0;
f4b2a6db TT	152	blk_t max_size = 0;
24b2c7a7	153	io_manager io_ptr;
55f4cbd9	154	char *new_size_str = 0;
46c5490d	155	int use_stride = -1;
fe07357f TT	156	#ifdef HAVE_FSTAT64
	157	struct stat64 st_buf;
	158	#else
116db1b5	159	struct stat st_buf;
fe07357f TT	160	#endif
fe07357f TT	161	__s64 new_file_size;
54434927	162	unsigned int sys_page_size = 4096;
a7ccdff8	163	long sysval;
bf69235a TT	164	int len, mount_flags;
bf69235a TT	165	char *mtpt;
ddc32a04 TT	166
	167	#ifdef ENABLE_NLS
	168	setlocale(LC_MESSAGES, "");
	169	setlocale(LC_CTYPE, "");
	170	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	171	textdomain(NLS_CAT_NAME);
	172	#endif
	173
a6d8302b	174	add_error_table(&et_ext2_error_table);
24b2c7a7	175
f35fd3d5	176	fprintf (stderr, "resize2fs %s (%s)\n",
ba0af756	177	E2FSPROGS_VERSION, E2FSPROGS_DATE);
24b2c7a7 TT	178	if (argc && *argv)
24b2c7a7 TT	179	program_name = *argv;
2e561e02	180
46c5490d	181	while ((c = getopt (argc, argv, "d:fFhpS:")) != EOF) {
24b2c7a7 TT	182	switch (c) {
	183	case 'h':
	184	usage(program_name);
	185	break;
f4b2a6db TT	186	case 'f':
	187	force = 1;
	188	break;
c762c8e6 TT	189	case 'F':
	190	flush = 1;
	191	break;
05e112a1 TT	192	case 'd':
	193	flags \|= atoi(optarg);
	194	break;
	195	case 'p':
	196	flags \|= RESIZE_PERCENT_COMPLETE;
	197	break;
46c5490d TT	198	case 'S':
	199	use_stride = atoi(optarg);
	200	break;
24b2c7a7	201	default:
f4b2a6db	202	usage(program_name);
24b2c7a7 TT	203	}
24b2c7a7 TT	204	}
f4b2a6db TT	205	if (optind == argc)
f4b2a6db TT	206	usage(program_name);
2e561e02	207
24b2c7a7	208	device_name = argv[optind++];
55f4cbd9 TT	209	if (optind < argc)
55f4cbd9 TT	210	new_size_str = argv[optind++];
f4b2a6db TT	211	if (optind < argc)
	212	usage(program_name);
	213
2e8ca9a2 TT	214	io_options = strchr(device_name, '?');
	215	if (io_options)
	216	*io_options++ = 0;
	217
bf69235a TT	218	/*
	219	* Figure out whether or not the device is mounted, and if it is
	220	* where it is mounted.
	221	*/
	222	len=80;
	223	while (1) {
	224	mtpt = malloc(len);
	225	if (!mtpt)
	226	return ENOMEM;
	227	mtpt[len-1] = 0;
	228	retval = ext2fs_check_mount_point(device_name, &mount_flags,
	229	mtpt, len);
	230	if (retval) {
	231	com_err("ext2fs_check_mount_point", retval,
	232	_("while determining whether %s is mounted."),
	233	device_name);
	234	exit(1);
	235	}
	236	if (!(mount_flags & EXT2_MF_MOUNTED) \|\| (mtpt[len-1] == 0))
	237	break;
	238	free(mtpt);
	239	len = 2 * len;
	240	}
fe07357f TT	241
	242	#ifdef HAVE_OPEN64
	243	fd = open64(device_name, O_RDWR);
	244	#else
	245	fd = open(device_name, O_RDWR);
	246	#endif
	247	if (fd < 0) {
	248	com_err("open", errno, _("while opening %s"),
	249	device_name);
	250	exit(1);
	251	}
	252
	253	#ifdef HAVE_FSTAT64
	254	ret = fstat64(fd, &st_buf);
	255	#else
	256	ret = fstat(fd, &st_buf);
	257	#endif
	258	if (ret < 0) {
	259	com_err("open", errno,
	260	_("while getting stat information for %s"),
	261	device_name);
	262	exit(1);
	263	}
f4b2a6db	264
c762c8e6	265	if (flush) {
48e08e03 TT	266	retval = ext2fs_sync_device(fd, 1);
	267	if (retval) {
	268	com_err(argv[0], retval,
a13575f4	269	_("while trying to flush %s"),
c762c8e6 TT	270	device_name);
	271	exit(1);
	272	}
fe07357f TT	273	}
	274
	275	if (!S_ISREG(st_buf.st_mode )) {
c762c8e6	276	close(fd);
fe07357f	277	fd = -1;
c762c8e6 TT	278	}
c762c8e6 TT	279
05e112a1 TT	280	if (flags & RESIZE_DEBUG_IO) {
	281	io_ptr = test_io_manager;
	282	test_io_backing_manager = unix_io_manager;
	283	} else
	284	io_ptr = unix_io_manager;
	285
5d2ef12f TT	286	if (!(mount_flags & EXT2_MF_MOUNTED))
	287	io_flags = EXT2_FLAG_RW \| EXT2_FLAG_EXCLUSIVE;
	288	retval = ext2fs_open2(device_name, io_options, io_flags,
2e8ca9a2	289	0, 0, io_ptr, &fs);
24b2c7a7	290	if (retval) {
a13575f4	291	com_err (program_name, retval, _("while trying to open %s"),
24b2c7a7	292	device_name);
a13575f4	293	printf (_("Couldn't find valid filesystem superblock.\n"));
24b2c7a7 TT	294	exit (1);
24b2c7a7 TT	295	}
101c84f2 TT	296	/*
	297	* Check for compatibility with the feature sets. We need to
	298	* be more stringent than ext2fs_open().
	299	*/
76dd5e5c	300	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
101c84f2 TT	301	com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
	302	"(%s)", device_name);
	303	exit(1);
	304	}
	305
a7ccdff8 TT	306	/* Determine the system page size if possible */
	307	#ifdef HAVE_SYSCONF
	308	#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
	309	#define _SC_PAGESIZE _SC_PAGE_SIZE
	310	#endif
	311	#ifdef _SC_PAGESIZE
	312	sysval = sysconf(_SC_PAGESIZE);
	313	if (sysval > 0)
	314	sys_page_size = sysval;
	315	#endif /* _SC_PAGESIZE */
	316	#endif /* HAVE_SYSCONF */
	317
f4b2a6db TT	318	/*
f4b2a6db TT	319	* Get the size of the containing partition, and use this for
fe07357f	320	* defaults and for making sure the new filesystem doesn't
f4b2a6db TT	321	* exceed the partition size.
	322	*/
	323	retval = ext2fs_get_device_size(device_name, fs->blocksize,
	324	&max_size);
	325	if (retval) {
	326	com_err(program_name, retval,
a13575f4	327	_("while trying to determine filesystem size"));
f4b2a6db TT	328	exit(1);
f4b2a6db TT	329	}
55f4cbd9 TT	330	if (new_size_str) {
	331	new_size = parse_num_blocks(new_size_str,
	332	fs->super->s_log_block_size);
	333	if (!new_size) {
	334	com_err(program_name, 0, _("bad filesystem size - %s"),
	335	new_size_str);
	336	exit(1);
	337	}
	338	} else {
f4b2a6db	339	new_size = max_size;
a7ccdff8 TT	340	/* Round down to an even multiple of a pagesize */
	341	if (sys_page_size > fs->blocksize)
	342	new_size &= ~((sys_page_size / fs->blocksize)-1);
	343	}
46c5490d TT	344
	345	if (use_stride >= 0) {
	346	if (use_stride >= fs->super->s_blocks_per_group) {
	347	com_err(program_name, 0,
	348	_("Invalid stride length"));
	349	exit(1);
	350	}
	351	fs->stride = use_stride;
	352	} else
	353	determine_fs_stride(fs);
792a0881	354
116db1b5 TT	355	/*
	356	* If we are resizing a plain file, and it's not big enough,
	357	* automatically extend it in a sparse fashion by writing the
	358	* last requested block.
	359	*/
fe07357f TT	360	new_file_size = ((__u64) new_size) * fs->blocksize;
	361	if ((__u64) new_file_size >
	362	(((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
	363	fd = -1;
	364	if ((new_file_size > st_buf.st_size) &&
	365	(fd > 0)) {
	366	if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
	367	(write(fd, "0", 1) == 1))
116db1b5	368	max_size = new_size;
116db1b5	369	}
f4b2a6db	370	if (!force && (new_size > max_size)) {
a13575f4	371	fprintf(stderr, _("The containing partition (or device)"
8deb80a5 TS	372	" is only %u (%dk) blocks.\nYou requested a new size"
8deb80a5 TS	373	" of %u blocks.\n\n"), max_size,
792a0881	374	fs->blocksize / 1024, new_size);
f4b2a6db TT	375	exit(1);
	376	}
	377	if (new_size == fs->super->s_blocks_count) {
8deb80a5	378	fprintf(stderr, _("The filesystem is already %u blocks "
a13575f4	379	"long. Nothing to do!\n\n"), new_size);
f4b2a6db TT	380	exit(0);
f4b2a6db TT	381	}
bf69235a TT	382	if (mount_flags & EXT2_MF_MOUNTED) {
	383	retval = online_resize_fs(fs, mtpt, &new_size, flags);
	384	} else {
	385	if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) \|\|
	386	(fs->super->s_state & EXT2_ERROR_FS) \|\|
	387	((fs->super->s_state & EXT2_VALID_FS) == 0))) {
	388	fprintf(stderr,
	389	_("Please run 'e2fsck -f %s' first.\n\n"),
	390	device_name);
	391	exit(1);
	392	}
8deb80a5	393	printf("Resizing the filesystem on %s to %u (%dk) blocks.\n",
bf69235a TT	394	device_name, new_size, fs->blocksize / 1024);
	395	retval = resize_fs(fs, &new_size, flags,
	396	((flags & RESIZE_PERCENT_COMPLETE) ?
	397	resize_progress_func : 0));
f4b2a6db	398	}
1e1da29f	399	if (retval) {
a13575f4	400	com_err(program_name, retval, _("while trying to resize %s"),
1e1da29f TT	401	device_name);
1e1da29f TT	402	ext2fs_close (fs);
16082112	403	exit(1);
1e1da29f	404	}
8deb80a5	405	printf(_("The filesystem on %s is now %u blocks long.\n\n"),
7e71e4c5	406	device_name, new_size);
fe07357f TT	407
	408	if ((st_buf.st_size > new_file_size) &&
	409	(fd > 0)) {
	410	#ifdef HAVE_FSTAT64
	411	ftruncate64(fd, new_file_size);
	412	#else
	413	ftruncate(fd, (off_t) new_file_size);
	414	#endif
	415	}
	416	if (fd > 0)
	417	close(fd);
a6d8302b	418	remove_error_table(&et_ext2_error_table);
0a617317	419	return (0);
24b2c7a7	420	}