[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>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#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] [-M] [-P] "
			   "[-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		force_min_size = 0;
	int		print_min_size = 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:fFhMPpS:")) != EOF) {
		switch (c) {
		case 'h':
			usage(program_name);
			break;
		case 'f':
			force = 1;
			break;
		case 'F':
			flush = 1;
			break;
		case 'M':
			force_min_size = 1;
			break;
		case 'P':
			print_min_size = 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;
	}

#ifdef CONFIG_TESTIO_DEBUG
	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else
#endif
		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);
	}

	/*
	 * XXXX   The combination of flex_bg and !resize_inode causes
	 * major problems for resize2fs, since when the group descriptors
	 * grow in size this can potentially require multiple inode
	 * tables to be moved aside to make room, and resize2fs chokes
	 * rather badly in this scenario.  It's a rare combination,
	 * except when a filesystem is expanded more than a certain
	 * size, so for now, we'll just prohibit that combination.
	 * This is something we should fix eventually, though.
	 */
	if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
	    !(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
		com_err(program_name, 0, _("%s: The combination of flex_bg "
					   "and\n\t!resize_inode features "
					   "is not supported by resize2fs.\n"),
			device_name);
		exit(1);
	}

	if (print_min_size) {
		printf(_("Estimated minimum size of the filesystem: %u\n"),
		       calculate_minimum_resize_size(fs));
		exit(0);
	}

	/* 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 (force_min_size)
		new_size = calculate_minimum_resize_size(fs);
	else if (new_size_str) {
		new_size = parse_num_blocks(new_size_str,
					    fs->super->s_log_block_size);
	} 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_FTRUNCATE64
		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
efc6f628	8	*
24b2c7a7	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	24	#include <unistd.h>
f38cf3cb TT	25	#ifdef HAVE_STDLIB_H
	26	#include <stdlib.h>
	27	#endif
fe07357f	28	#include <sys/types.h>
116db1b5	29	#include <sys/stat.h>
fe07357f	30	#include <fcntl.h>
c762c8e6	31
55f4cbd9 TT	32	#include "e2p/e2p.h"
55f4cbd9 TT	33
24b2c7a7 TT	34	#include "resize2fs.h"
24b2c7a7 TT	35
0cee8a5c	36	#include "../version.h"
2e561e02	37
2e8ca9a2	38	char program_name, device_name, *io_options;
24b2c7a7	39
dfcdc32f	40	static void usage (char *prog)
24b2c7a7	41	{
199ddaaa JB	42	fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-M] [-P] "
199ddaaa JB	43	"[-p] device [new_size]\n\n"), prog);
2e561e02	44
24b2c7a7 TT	45	exit (1);
	46	}
	47
3b627e8d TT	48	static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
3b627e8d TT	49	unsigned long cur, unsigned long max)
63b44fbe TT	50	{
	51	ext2_sim_progmeter progress;
	52	const char *label;
	53	errcode_t retval;
	54
	55	progress = (ext2_sim_progmeter) rfs->prog_data;
f4b2a6db	56	if (max == 0)
3b627e8d	57	return 0;
63b44fbe TT	58	if (cur == 0) {
	59	if (progress)
	60	ext2fs_progress_close(progress);
	61	progress = 0;
	62	switch (pass) {
a8519a2d	63	case E2_RSZ_EXTEND_ITABLE_PASS:
a13575f4	64	label = _("Extending the inode table");
63b44fbe TT	65	break;
63b44fbe TT	66	case E2_RSZ_BLOCK_RELOC_PASS:
a13575f4	67	label = _("Relocating blocks");
63b44fbe	68	break;
a8519a2d	69	case E2_RSZ_INODE_SCAN_PASS:
a13575f4	70	label = _("Scanning inode table");
63b44fbe TT	71	break;
63b44fbe TT	72	case E2_RSZ_INODE_REF_UPD_PASS:
a13575f4	73	label = _("Updating inode references");
63b44fbe TT	74	break;
63b44fbe TT	75	case E2_RSZ_MOVE_ITABLE_PASS:
a13575f4	76	label = _("Moving inode table");
63b44fbe	77	break;
a8519a2d	78	default:
a13575f4	79	label = _("Unknown pass?!?");
a8519a2d	80	break;
63b44fbe	81	}
a13575f4	82	printf(_("Begin pass %d (max = %lu)\n"), pass, max);
63b44fbe TT	83	retval = ext2fs_progress_init(&progress, label, 30,
	84	40, max, 0);
	85	if (retval)
	86	progress = 0;
	87	rfs->prog_data = (void *) progress;
	88	}
	89	if (progress)
	90	ext2fs_progress_update(progress, cur);
	91	if (cur >= max) {
	92	if (progress)
	93	ext2fs_progress_close(progress);
	94	progress = 0;
	95	rfs->prog_data = 0;
	96	}
3b627e8d	97	return 0;
63b44fbe TT	98	}
63b44fbe TT	99
46c5490d TT	100	static void determine_fs_stride(ext2_filsys fs)
	101	{
	102	unsigned int group;
	103	unsigned long long sum;
	104	unsigned int has_sb, prev_has_sb, num;
	105	int i_stride, b_stride;
	106
96c6a3ac TT	107	if (fs->stride)
96c6a3ac TT	108	return;
46c5490d TT	109	num = 0; sum = 0;
	110	for (group = 0; group < fs->group_desc_count; group++) {
	111	has_sb = ext2fs_bg_has_super(fs, group);
	112	if (group == 0 \|\| has_sb != prev_has_sb)
	113	goto next;
efc6f628 TT	114	b_stride = fs->group_desc[group].bg_block_bitmap -
efc6f628 TT	115	fs->group_desc[group-1].bg_block_bitmap -
46c5490d	116	fs->super->s_blocks_per_group;
efc6f628 TT	117	i_stride = fs->group_desc[group].bg_inode_bitmap -
efc6f628 TT	118	fs->group_desc[group-1].bg_inode_bitmap -
46c5490d TT	119	fs->super->s_blocks_per_group;
	120	if (b_stride != i_stride \|\|
	121	b_stride < 0)
	122	goto next;
	123
	124	/* printf("group %d has stride %d\n", group, b_stride); */
	125	sum += b_stride;
	126	num++;
efc6f628	127
46c5490d TT	128	next:
	129	prev_has_sb = has_sb;
	130	}
	131
	132	if (fs->group_desc_count > 12 && num < 3)
	133	sum = 0;
	134
	135	if (num)
	136	fs->stride = sum / num;
	137	else
	138	fs->stride = 0;
	139
96c6a3ac TT	140	fs->super->s_raid_stride = fs->stride;
	141	ext2fs_mark_super_dirty(fs);
	142
46c5490d TT	143	#if 0
	144	if (fs->stride)
	145	printf("Using RAID stride of %d\n", fs->stride);
	146	#endif
	147	}
	148
0a617317	149	int main (int argc, char ** argv)
24b2c7a7 TT	150	{
	151	errcode_t retval;
	152	ext2_filsys fs;
	153	int c;
05e112a1	154	int flags = 0;
c762c8e6	155	int flush = 0;
f4b2a6db	156	int force = 0;
5d2ef12f	157	int io_flags = 0;
199ddaaa JB	158	int force_min_size = 0;
199ddaaa JB	159	int print_min_size = 0;
fe07357f	160	int fd, ret;
f4b2a6db TT	161	blk_t new_size = 0;
f4b2a6db TT	162	blk_t max_size = 0;
24b2c7a7	163	io_manager io_ptr;
55f4cbd9	164	char *new_size_str = 0;
46c5490d	165	int use_stride = -1;
fe07357f TT	166	#ifdef HAVE_FSTAT64
	167	struct stat64 st_buf;
	168	#else
116db1b5	169	struct stat st_buf;
fe07357f TT	170	#endif
fe07357f TT	171	__s64 new_file_size;
54434927	172	unsigned int sys_page_size = 4096;
a7ccdff8	173	long sysval;
bf69235a TT	174	int len, mount_flags;
bf69235a TT	175	char *mtpt;
ddc32a04 TT	176
	177	#ifdef ENABLE_NLS
	178	setlocale(LC_MESSAGES, "");
	179	setlocale(LC_CTYPE, "");
	180	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	181	textdomain(NLS_CAT_NAME);
	182	#endif
	183
a6d8302b	184	add_error_table(&et_ext2_error_table);
24b2c7a7	185
f35fd3d5	186	fprintf (stderr, "resize2fs %s (%s)\n",
ba0af756	187	E2FSPROGS_VERSION, E2FSPROGS_DATE);
24b2c7a7 TT	188	if (argc && *argv)
24b2c7a7 TT	189	program_name = *argv;
2e561e02	190
199ddaaa	191	while ((c = getopt (argc, argv, "d:fFhMPpS:")) != EOF) {
24b2c7a7 TT	192	switch (c) {
	193	case 'h':
	194	usage(program_name);
	195	break;
f4b2a6db TT	196	case 'f':
	197	force = 1;
	198	break;
c762c8e6 TT	199	case 'F':
	200	flush = 1;
	201	break;
199ddaaa JB	202	case 'M':
	203	force_min_size = 1;
	204	break;
	205	case 'P':
	206	print_min_size = 1;
	207	break;
05e112a1 TT	208	case 'd':
	209	flags \|= atoi(optarg);
	210	break;
	211	case 'p':
	212	flags \|= RESIZE_PERCENT_COMPLETE;
	213	break;
46c5490d TT	214	case 'S':
	215	use_stride = atoi(optarg);
	216	break;
24b2c7a7	217	default:
f4b2a6db	218	usage(program_name);
24b2c7a7 TT	219	}
24b2c7a7 TT	220	}
f4b2a6db TT	221	if (optind == argc)
f4b2a6db TT	222	usage(program_name);
2e561e02	223
24b2c7a7	224	device_name = argv[optind++];
55f4cbd9 TT	225	if (optind < argc)
55f4cbd9 TT	226	new_size_str = argv[optind++];
f4b2a6db TT	227	if (optind < argc)
f4b2a6db TT	228	usage(program_name);
efc6f628	229
2e8ca9a2 TT	230	io_options = strchr(device_name, '?');
	231	if (io_options)
	232	*io_options++ = 0;
	233
bf69235a TT	234	/*
	235	* Figure out whether or not the device is mounted, and if it is
	236	* where it is mounted.
	237	*/
	238	len=80;
	239	while (1) {
	240	mtpt = malloc(len);
	241	if (!mtpt)
	242	return ENOMEM;
	243	mtpt[len-1] = 0;
efc6f628	244	retval = ext2fs_check_mount_point(device_name, &mount_flags,
bf69235a TT	245	mtpt, len);
	246	if (retval) {
	247	com_err("ext2fs_check_mount_point", retval,
	248	_("while determining whether %s is mounted."),
	249	device_name);
	250	exit(1);
	251	}
	252	if (!(mount_flags & EXT2_MF_MOUNTED) \|\| (mtpt[len-1] == 0))
	253	break;
	254	free(mtpt);
	255	len = 2 * len;
	256	}
fe07357f TT	257
	258	#ifdef HAVE_OPEN64
	259	fd = open64(device_name, O_RDWR);
	260	#else
	261	fd = open(device_name, O_RDWR);
	262	#endif
	263	if (fd < 0) {
	264	com_err("open", errno, _("while opening %s"),
	265	device_name);
	266	exit(1);
	267	}
	268
	269	#ifdef HAVE_FSTAT64
	270	ret = fstat64(fd, &st_buf);
	271	#else
	272	ret = fstat(fd, &st_buf);
	273	#endif
	274	if (ret < 0) {
efc6f628	275	com_err("open", errno,
fe07357f TT	276	_("while getting stat information for %s"),
	277	device_name);
	278	exit(1);
	279	}
efc6f628	280
c762c8e6	281	if (flush) {
48e08e03 TT	282	retval = ext2fs_sync_device(fd, 1);
48e08e03 TT	283	if (retval) {
efc6f628	284	com_err(argv[0], retval,
a13575f4	285	_("while trying to flush %s"),
c762c8e6 TT	286	device_name);
	287	exit(1);
	288	}
fe07357f TT	289	}
	290
	291	if (!S_ISREG(st_buf.st_mode )) {
c762c8e6	292	close(fd);
fe07357f	293	fd = -1;
c762c8e6 TT	294	}
c762c8e6 TT	295
f38cf3cb TT	296	#ifdef CONFIG_TESTIO_DEBUG
f38cf3cb TT	297	if (getenv("TEST_IO_FLAGS") \|\| getenv("TEST_IO_BLOCK")) {
05e112a1 TT	298	io_ptr = test_io_manager;
05e112a1 TT	299	test_io_backing_manager = unix_io_manager;
efc6f628	300	} else
f38cf3cb	301	#endif
05e112a1 TT	302	io_ptr = unix_io_manager;
05e112a1 TT	303
5d2ef12f TT	304	if (!(mount_flags & EXT2_MF_MOUNTED))
5d2ef12f TT	305	io_flags = EXT2_FLAG_RW \| EXT2_FLAG_EXCLUSIVE;
efc6f628	306	retval = ext2fs_open2(device_name, io_options, io_flags,
2e8ca9a2	307	0, 0, io_ptr, &fs);
24b2c7a7	308	if (retval) {
a13575f4	309	com_err (program_name, retval, _("while trying to open %s"),
24b2c7a7	310	device_name);
a13575f4	311	printf (_("Couldn't find valid filesystem superblock.\n"));
24b2c7a7 TT	312	exit (1);
24b2c7a7 TT	313	}
236efede	314
101c84f2 TT	315	/*
	316	* Check for compatibility with the feature sets. We need to
	317	* be more stringent than ext2fs_open().
	318	*/
76dd5e5c	319	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
101c84f2 TT	320	com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
	321	"(%s)", device_name);
	322	exit(1);
	323	}
a8d632a4 TT	324
	325	/*
	326	* XXXX The combination of flex_bg and !resize_inode causes
	327	* major problems for resize2fs, since when the group descriptors
	328	* grow in size this can potentially require multiple inode
	329	* tables to be moved aside to make room, and resize2fs chokes
	330	* rather badly in this scenario. It's a rare combination,
	331	* except when a filesystem is expanded more than a certain
	332	* size, so for now, we'll just prohibit that combination.
	333	* This is something we should fix eventually, though.
	334	*/
	335	if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
	336	!(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
	337	com_err(program_name, 0, _("%s: The combination of flex_bg "
	338	"and\n\t!resize_inode features "
	339	"is not supported by resize2fs.\n"),
	340	device_name);
	341	exit(1);
	342	}
efc6f628	343
199ddaaa	344	if (print_min_size) {
a8d632a4	345	printf(_("Estimated minimum size of the filesystem: %u\n"),
199ddaaa JB	346	calculate_minimum_resize_size(fs));
	347	exit(0);
	348	}
	349
a7ccdff8 TT	350	/* Determine the system page size if possible */
	351	#ifdef HAVE_SYSCONF
	352	#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
	353	#define _SC_PAGESIZE _SC_PAGE_SIZE
	354	#endif
	355	#ifdef _SC_PAGESIZE
	356	sysval = sysconf(_SC_PAGESIZE);
	357	if (sysval > 0)
	358	sys_page_size = sysval;
	359	#endif /* _SC_PAGESIZE */
	360	#endif /* HAVE_SYSCONF */
	361
f4b2a6db TT	362	/*
f4b2a6db TT	363	* Get the size of the containing partition, and use this for
fe07357f	364	* defaults and for making sure the new filesystem doesn't
f4b2a6db TT	365	* exceed the partition size.
	366	*/
	367	retval = ext2fs_get_device_size(device_name, fs->blocksize,
	368	&max_size);
	369	if (retval) {
	370	com_err(program_name, retval,
a13575f4	371	_("while trying to determine filesystem size"));
f4b2a6db TT	372	exit(1);
f4b2a6db TT	373	}
199ddaaa JB	374	if (force_min_size)
	375	new_size = calculate_minimum_resize_size(fs);
	376	else if (new_size_str) {
efc6f628	377	new_size = parse_num_blocks(new_size_str,
55f4cbd9	378	fs->super->s_log_block_size);
55f4cbd9	379	} else {
f4b2a6db	380	new_size = max_size;
a7ccdff8 TT	381	/* Round down to an even multiple of a pagesize */
	382	if (sys_page_size > fs->blocksize)
	383	new_size &= ~((sys_page_size / fs->blocksize)-1);
	384	}
46c5490d TT	385
46c5490d TT	386	if (use_stride >= 0) {
de8f3a76	387	if (use_stride >= (int) fs->super->s_blocks_per_group) {
efc6f628	388	com_err(program_name, 0,
46c5490d TT	389	_("Invalid stride length"));
	390	exit(1);
	391	}
96c6a3ac TT	392	fs->stride = fs->super->s_raid_stride = use_stride;
96c6a3ac TT	393	ext2fs_mark_super_dirty(fs);
46c5490d TT	394	} else
46c5490d TT	395	determine_fs_stride(fs);
efc6f628	396
116db1b5 TT	397	/*
	398	* If we are resizing a plain file, and it's not big enough,
	399	* automatically extend it in a sparse fashion by writing the
	400	* last requested block.
	401	*/
fe07357f	402	new_file_size = ((__u64) new_size) * fs->blocksize;
efc6f628	403	if ((__u64) new_file_size >
fe07357f TT	404	(((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
	405	fd = -1;
	406	if ((new_file_size > st_buf.st_size) &&
	407	(fd > 0)) {
	408	if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
	409	(write(fd, "0", 1) == 1))
116db1b5	410	max_size = new_size;
116db1b5	411	}
f4b2a6db	412	if (!force && (new_size > max_size)) {
a13575f4	413	fprintf(stderr, _("The containing partition (or device)"
8deb80a5 TS	414	" is only %u (%dk) blocks.\nYou requested a new size"
8deb80a5 TS	415	" of %u blocks.\n\n"), max_size,
792a0881	416	fs->blocksize / 1024, new_size);
f4b2a6db TT	417	exit(1);
	418	}
	419	if (new_size == fs->super->s_blocks_count) {
8deb80a5	420	fprintf(stderr, _("The filesystem is already %u blocks "
a13575f4	421	"long. Nothing to do!\n\n"), new_size);
f4b2a6db TT	422	exit(0);
f4b2a6db TT	423	}
bf69235a TT	424	if (mount_flags & EXT2_MF_MOUNTED) {
	425	retval = online_resize_fs(fs, mtpt, &new_size, flags);
	426	} else {
	427	if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) \|\|
	428	(fs->super->s_state & EXT2_ERROR_FS) \|\|
	429	((fs->super->s_state & EXT2_VALID_FS) == 0))) {
efc6f628	430	fprintf(stderr,
bf69235a TT	431	_("Please run 'e2fsck -f %s' first.\n\n"),
	432	device_name);
	433	exit(1);
	434	}
8deb80a5	435	printf("Resizing the filesystem on %s to %u (%dk) blocks.\n",
bf69235a TT	436	device_name, new_size, fs->blocksize / 1024);
	437	retval = resize_fs(fs, &new_size, flags,
	438	((flags & RESIZE_PERCENT_COMPLETE) ?
	439	resize_progress_func : 0));
f4b2a6db	440	}
1e1da29f	441	if (retval) {
a13575f4	442	com_err(program_name, retval, _("while trying to resize %s"),
1e1da29f TT	443	device_name);
1e1da29f TT	444	ext2fs_close (fs);
16082112	445	exit(1);
1e1da29f	446	}
8deb80a5	447	printf(_("The filesystem on %s is now %u blocks long.\n\n"),
7e71e4c5	448	device_name, new_size);
fe07357f TT	449
	450	if ((st_buf.st_size > new_file_size) &&
	451	(fd > 0)) {
261cd396	452	#ifdef HAVE_FTRUNCATE64
fe07357f TT	453	ftruncate64(fd, new_file_size);
fe07357f TT	454	#else
98dca6c5 TT	455	/* Only truncate if new_file_size doesn't overflow off_t */
	456	if (((off_t) new_file_size) == new_file_size)
	457	ftruncate(fd, (off_t) new_file_size);
fe07357f TT	458	#endif
	459	}
	460	if (fd > 0)
	461	close(fd);
a6d8302b	462	remove_error_table(&et_ext2_error_table);
0a617317	463	return (0);
24b2c7a7	464	}