[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;

	if (fs->stride)
		return;
	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;

	fs->super->s_raid_stride = fs->stride;
	ext2fs_mark_super_dirty(fs);

#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 >= (int) fs->super->s_blocks_per_group) {
			com_err(program_name, 0, 
				_("Invalid stride length"));
			exit(1);
		}
		fs->stride = fs->super->s_raid_stride = use_stride;
		ext2fs_mark_super_dirty(fs);
	} 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
		/* Only truncate if new_file_size doesn't overflow off_t */
		if (((off_t) new_file_size) == new_file_size)
			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
96c6a3ac TT	104	if (fs->stride)
96c6a3ac TT	105	return;
46c5490d TT	106	num = 0; sum = 0;
	107	for (group = 0; group < fs->group_desc_count; group++) {
	108	has_sb = ext2fs_bg_has_super(fs, group);
	109	if (group == 0 \|\| has_sb != prev_has_sb)
	110	goto next;
	111	b_stride = fs->group_desc[group].bg_block_bitmap -
	112	fs->group_desc[group-1].bg_block_bitmap -
	113	fs->super->s_blocks_per_group;
	114	i_stride = fs->group_desc[group].bg_inode_bitmap -
	115	fs->group_desc[group-1].bg_inode_bitmap -
	116	fs->super->s_blocks_per_group;
	117	if (b_stride != i_stride \|\|
	118	b_stride < 0)
	119	goto next;
	120
	121	/* printf("group %d has stride %d\n", group, b_stride); */
	122	sum += b_stride;
	123	num++;
	124
	125	next:
	126	prev_has_sb = has_sb;
	127	}
	128
	129	if (fs->group_desc_count > 12 && num < 3)
	130	sum = 0;
	131
	132	if (num)
	133	fs->stride = sum / num;
	134	else
	135	fs->stride = 0;
	136
96c6a3ac TT	137	fs->super->s_raid_stride = fs->stride;
	138	ext2fs_mark_super_dirty(fs);
	139
46c5490d TT	140	#if 0
	141	if (fs->stride)
	142	printf("Using RAID stride of %d\n", fs->stride);
	143	#endif
	144	}
	145
0a617317	146	int main (int argc, char ** argv)
24b2c7a7 TT	147	{
	148	errcode_t retval;
	149	ext2_filsys fs;
	150	int c;
05e112a1	151	int flags = 0;
c762c8e6	152	int flush = 0;
f4b2a6db	153	int force = 0;
5d2ef12f	154	int io_flags = 0;
fe07357f	155	int fd, ret;
f4b2a6db TT	156	blk_t new_size = 0;
f4b2a6db TT	157	blk_t max_size = 0;
24b2c7a7	158	io_manager io_ptr;
55f4cbd9	159	char *new_size_str = 0;
46c5490d	160	int use_stride = -1;
fe07357f TT	161	#ifdef HAVE_FSTAT64
	162	struct stat64 st_buf;
	163	#else
116db1b5	164	struct stat st_buf;
fe07357f TT	165	#endif
fe07357f TT	166	__s64 new_file_size;
54434927	167	unsigned int sys_page_size = 4096;
a7ccdff8	168	long sysval;
bf69235a TT	169	int len, mount_flags;
bf69235a TT	170	char *mtpt;
ddc32a04 TT	171
	172	#ifdef ENABLE_NLS
	173	setlocale(LC_MESSAGES, "");
	174	setlocale(LC_CTYPE, "");
	175	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	176	textdomain(NLS_CAT_NAME);
	177	#endif
	178
a6d8302b	179	add_error_table(&et_ext2_error_table);
24b2c7a7	180
f35fd3d5	181	fprintf (stderr, "resize2fs %s (%s)\n",
ba0af756	182	E2FSPROGS_VERSION, E2FSPROGS_DATE);
24b2c7a7 TT	183	if (argc && *argv)
24b2c7a7 TT	184	program_name = *argv;
2e561e02	185
46c5490d	186	while ((c = getopt (argc, argv, "d:fFhpS:")) != EOF) {
24b2c7a7 TT	187	switch (c) {
	188	case 'h':
	189	usage(program_name);
	190	break;
f4b2a6db TT	191	case 'f':
	192	force = 1;
	193	break;
c762c8e6 TT	194	case 'F':
	195	flush = 1;
	196	break;
05e112a1 TT	197	case 'd':
	198	flags \|= atoi(optarg);
	199	break;
	200	case 'p':
	201	flags \|= RESIZE_PERCENT_COMPLETE;
	202	break;
46c5490d TT	203	case 'S':
	204	use_stride = atoi(optarg);
	205	break;
24b2c7a7	206	default:
f4b2a6db	207	usage(program_name);
24b2c7a7 TT	208	}
24b2c7a7 TT	209	}
f4b2a6db TT	210	if (optind == argc)
f4b2a6db TT	211	usage(program_name);
2e561e02	212
24b2c7a7	213	device_name = argv[optind++];
55f4cbd9 TT	214	if (optind < argc)
55f4cbd9 TT	215	new_size_str = argv[optind++];
f4b2a6db TT	216	if (optind < argc)
	217	usage(program_name);
	218
2e8ca9a2 TT	219	io_options = strchr(device_name, '?');
	220	if (io_options)
	221	*io_options++ = 0;
	222
bf69235a TT	223	/*
	224	* Figure out whether or not the device is mounted, and if it is
	225	* where it is mounted.
	226	*/
	227	len=80;
	228	while (1) {
	229	mtpt = malloc(len);
	230	if (!mtpt)
	231	return ENOMEM;
	232	mtpt[len-1] = 0;
	233	retval = ext2fs_check_mount_point(device_name, &mount_flags,
	234	mtpt, len);
	235	if (retval) {
	236	com_err("ext2fs_check_mount_point", retval,
	237	_("while determining whether %s is mounted."),
	238	device_name);
	239	exit(1);
	240	}
	241	if (!(mount_flags & EXT2_MF_MOUNTED) \|\| (mtpt[len-1] == 0))
	242	break;
	243	free(mtpt);
	244	len = 2 * len;
	245	}
fe07357f TT	246
	247	#ifdef HAVE_OPEN64
	248	fd = open64(device_name, O_RDWR);
	249	#else
	250	fd = open(device_name, O_RDWR);
	251	#endif
	252	if (fd < 0) {
	253	com_err("open", errno, _("while opening %s"),
	254	device_name);
	255	exit(1);
	256	}
	257
	258	#ifdef HAVE_FSTAT64
	259	ret = fstat64(fd, &st_buf);
	260	#else
	261	ret = fstat(fd, &st_buf);
	262	#endif
	263	if (ret < 0) {
	264	com_err("open", errno,
	265	_("while getting stat information for %s"),
	266	device_name);
	267	exit(1);
	268	}
f4b2a6db	269
c762c8e6	270	if (flush) {
48e08e03 TT	271	retval = ext2fs_sync_device(fd, 1);
	272	if (retval) {
	273	com_err(argv[0], retval,
a13575f4	274	_("while trying to flush %s"),
c762c8e6 TT	275	device_name);
	276	exit(1);
	277	}
fe07357f TT	278	}
	279
	280	if (!S_ISREG(st_buf.st_mode )) {
c762c8e6	281	close(fd);
fe07357f	282	fd = -1;
c762c8e6 TT	283	}
c762c8e6 TT	284
05e112a1 TT	285	if (flags & RESIZE_DEBUG_IO) {
	286	io_ptr = test_io_manager;
	287	test_io_backing_manager = unix_io_manager;
	288	} else
	289	io_ptr = unix_io_manager;
	290
5d2ef12f TT	291	if (!(mount_flags & EXT2_MF_MOUNTED))
	292	io_flags = EXT2_FLAG_RW \| EXT2_FLAG_EXCLUSIVE;
	293	retval = ext2fs_open2(device_name, io_options, io_flags,
2e8ca9a2	294	0, 0, io_ptr, &fs);
24b2c7a7	295	if (retval) {
a13575f4	296	com_err (program_name, retval, _("while trying to open %s"),
24b2c7a7	297	device_name);
a13575f4	298	printf (_("Couldn't find valid filesystem superblock.\n"));
24b2c7a7 TT	299	exit (1);
24b2c7a7 TT	300	}
101c84f2 TT	301	/*
	302	* Check for compatibility with the feature sets. We need to
	303	* be more stringent than ext2fs_open().
	304	*/
76dd5e5c	305	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
101c84f2 TT	306	com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
	307	"(%s)", device_name);
	308	exit(1);
	309	}
	310
a7ccdff8 TT	311	/* Determine the system page size if possible */
	312	#ifdef HAVE_SYSCONF
	313	#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
	314	#define _SC_PAGESIZE _SC_PAGE_SIZE
	315	#endif
	316	#ifdef _SC_PAGESIZE
	317	sysval = sysconf(_SC_PAGESIZE);
	318	if (sysval > 0)
	319	sys_page_size = sysval;
	320	#endif /* _SC_PAGESIZE */
	321	#endif /* HAVE_SYSCONF */
	322
f4b2a6db TT	323	/*
f4b2a6db TT	324	* Get the size of the containing partition, and use this for
fe07357f	325	* defaults and for making sure the new filesystem doesn't
f4b2a6db TT	326	* exceed the partition size.
	327	*/
	328	retval = ext2fs_get_device_size(device_name, fs->blocksize,
	329	&max_size);
	330	if (retval) {
	331	com_err(program_name, retval,
a13575f4	332	_("while trying to determine filesystem size"));
f4b2a6db TT	333	exit(1);
f4b2a6db TT	334	}
55f4cbd9 TT	335	if (new_size_str) {
	336	new_size = parse_num_blocks(new_size_str,
	337	fs->super->s_log_block_size);
	338	if (!new_size) {
	339	com_err(program_name, 0, _("bad filesystem size - %s"),
	340	new_size_str);
	341	exit(1);
	342	}
	343	} else {
f4b2a6db	344	new_size = max_size;
a7ccdff8 TT	345	/* Round down to an even multiple of a pagesize */
	346	if (sys_page_size > fs->blocksize)
	347	new_size &= ~((sys_page_size / fs->blocksize)-1);
	348	}
46c5490d TT	349
46c5490d TT	350	if (use_stride >= 0) {
de8f3a76	351	if (use_stride >= (int) fs->super->s_blocks_per_group) {
46c5490d TT	352	com_err(program_name, 0,
	353	_("Invalid stride length"));
	354	exit(1);
	355	}
96c6a3ac TT	356	fs->stride = fs->super->s_raid_stride = use_stride;
96c6a3ac TT	357	ext2fs_mark_super_dirty(fs);
46c5490d TT	358	} else
46c5490d TT	359	determine_fs_stride(fs);
792a0881	360
116db1b5 TT	361	/*
	362	* If we are resizing a plain file, and it's not big enough,
	363	* automatically extend it in a sparse fashion by writing the
	364	* last requested block.
	365	*/
fe07357f TT	366	new_file_size = ((__u64) new_size) * fs->blocksize;
	367	if ((__u64) new_file_size >
	368	(((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
	369	fd = -1;
	370	if ((new_file_size > st_buf.st_size) &&
	371	(fd > 0)) {
	372	if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
	373	(write(fd, "0", 1) == 1))
116db1b5	374	max_size = new_size;
116db1b5	375	}
f4b2a6db	376	if (!force && (new_size > max_size)) {
a13575f4	377	fprintf(stderr, _("The containing partition (or device)"
8deb80a5 TS	378	" is only %u (%dk) blocks.\nYou requested a new size"
8deb80a5 TS	379	" of %u blocks.\n\n"), max_size,
792a0881	380	fs->blocksize / 1024, new_size);
f4b2a6db TT	381	exit(1);
	382	}
	383	if (new_size == fs->super->s_blocks_count) {
8deb80a5	384	fprintf(stderr, _("The filesystem is already %u blocks "
a13575f4	385	"long. Nothing to do!\n\n"), new_size);
f4b2a6db TT	386	exit(0);
f4b2a6db TT	387	}
bf69235a TT	388	if (mount_flags & EXT2_MF_MOUNTED) {
	389	retval = online_resize_fs(fs, mtpt, &new_size, flags);
	390	} else {
	391	if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) \|\|
	392	(fs->super->s_state & EXT2_ERROR_FS) \|\|
	393	((fs->super->s_state & EXT2_VALID_FS) == 0))) {
	394	fprintf(stderr,
	395	_("Please run 'e2fsck -f %s' first.\n\n"),
	396	device_name);
	397	exit(1);
	398	}
8deb80a5	399	printf("Resizing the filesystem on %s to %u (%dk) blocks.\n",
bf69235a TT	400	device_name, new_size, fs->blocksize / 1024);
	401	retval = resize_fs(fs, &new_size, flags,
	402	((flags & RESIZE_PERCENT_COMPLETE) ?
	403	resize_progress_func : 0));
f4b2a6db	404	}
1e1da29f	405	if (retval) {
a13575f4	406	com_err(program_name, retval, _("while trying to resize %s"),
1e1da29f TT	407	device_name);
1e1da29f TT	408	ext2fs_close (fs);
16082112	409	exit(1);
1e1da29f	410	}
8deb80a5	411	printf(_("The filesystem on %s is now %u blocks long.\n\n"),
7e71e4c5	412	device_name, new_size);
fe07357f TT	413
	414	if ((st_buf.st_size > new_file_size) &&
	415	(fd > 0)) {
	416	#ifdef HAVE_FSTAT64
	417	ftruncate64(fd, new_file_size);
	418	#else
98dca6c5 TT	419	/* Only truncate if new_file_size doesn't overflow off_t */
	420	if (((off_t) new_file_size) == new_file_size)
	421	ftruncate(fd, (off_t) new_file_size);
fe07357f TT	422	#endif
	423	}
	424	if (fd > 0)
	425	close(fd);
a6d8302b	426	remove_error_table(&et_ext2_error_table);
0a617317	427	return (0);
24b2c7a7	428	}