/*
* 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;
blk_t min_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);
}
min_size = calculate_minimum_resize_size(fs);
if (print_min_size) {
printf(_("Estimated minimum size of the filesystem: %u\n"),
min_size);
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 = min_size;
else if (new_size_str) {
new_size = parse_num_blocks(new_size_str,
fs->super->s_log_block_size);
if (new_size == 0) {
com_err(program_name, 0,
_("Invalid new size: %s\n"), 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 (!force && new_size < min_size) {
com_err(program_name, 0,
_("New size smaller than minimum (%u)\n"), min_size);
exit(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));
}
free(mtpt);
if (retval) {
com_err(program_name, retval, _("while trying to resize %s"),
device_name);
fprintf(stderr,
_("Please run 'e2fsck -fy %s' to fix the filesystem\n"
"after the aborted resize operation.\n"),
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
retval = ftruncate64(fd, new_file_size);
#else
retval = 0;
/* Only truncate if new_file_size doesn't overflow off_t */
if (((off_t) new_file_size) == new_file_size)
retval = ftruncate(fd, (off_t) new_file_size);
#endif
if (retval)
com_err(program_name, retval,
_("while trying to truncate %s"),
device_name);
}
if (fd > 0)
close(fd);
remove_error_table(&et_ext2_error_table);
return (0);
}