blob: 5610da575a361e9e8222f59e8cafd640880c2e46 [file] [log] [blame]
/*
* main.c --- ext2 resizer main program
*
* Copyright (C) 1997, 1998 by Theodore Ts'o and
* PowerQuest, Inc.
*
* Copyright (C) 1999, 2000, 2001 by Theosore Ts'o
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
#include <fcntl.h>
#include <sys/stat.h>
#include "resize2fs.h"
#include "../version.h"
char *program_name, *device_name;
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 check_mount(char *device)
{
errcode_t retval;
int mount_flags;
retval = ext2fs_check_if_mounted(device, &mount_flags);
if (retval) {
com_err(_("ext2fs_check_if_mount"), retval,
_("while determining whether %s is mounted."),
device);
return;
}
if (!(mount_flags & EXT2_MF_MOUNTED))
return;
fprintf(stderr, _("%s is mounted; can't resize a "
"mounted filesystem!\n\n"), device);
exit(1);
}
int main (int argc, char ** argv)
{
errcode_t retval;
ext2_filsys fs;
int c;
int flags = 0;
int flush = 0;
int force = 0;
int fd;
blk_t new_size = 0;
blk_t max_size = 0;
io_manager io_ptr;
char *tmp;
struct stat st_buf;
initialize_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:fFhp")) != 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;
default:
usage(program_name);
}
}
if (optind == argc)
usage(program_name);
device_name = argv[optind++];
if (optind < argc) {
new_size = strtoul(argv[optind++], &tmp, 0);
if (*tmp) {
com_err(program_name, 0, _("bad filesystem size - %s"),
argv[optind - 1]);
exit(1);
}
}
if (optind < argc)
usage(program_name);
check_mount(device_name);
if (flush) {
fd = open(device_name, O_RDONLY, 0);
if (fd < 0) {
com_err("open", errno,
_("while opening %s for flushing"),
device_name);
exit(1);
}
retval = ext2fs_sync_device(fd, 1);
if (retval) {
com_err(argv[0], retval,
_("while trying to flush %s"),
device_name);
exit(1);
}
close(fd);
}
if (flags & RESIZE_DEBUG_IO) {
io_ptr = test_io_manager;
test_io_backing_manager = unix_io_manager;
} else
io_ptr = unix_io_manager;
retval = ext2fs_open (device_name, EXT2_FLAG_RW, 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) ||
(fs->super->s_feature_incompat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP)) {
com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
"(%s)", device_name);
exit(1);
}
/*
* Get the size of the containing partition, and use this for
* defaults and for making sure the new filesystme 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)
new_size = max_size;
/*
* 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.
*/
if ((new_size > max_size) &&
(stat(device_name, &st_buf) == 0) &&
S_ISREG(st_buf.st_mode) &&
((tmp = malloc(fs->blocksize)) != 0)) {
memset(tmp, 0, fs->blocksize);
retval = io_channel_write_blk(fs->io, new_size-1, 1, tmp);
if (retval == 0)
max_size = new_size;
free(tmp);
}
if (!force && (new_size > max_size)) {
fprintf(stderr, _("The containing partition (or device)"
" is only %d blocks.\nYou requested a new size"
" of %d blocks.\n\n"), max_size,
new_size);
exit(1);
}
if (new_size == fs->super->s_blocks_count) {
fprintf(stderr, _("The filesystem is already %d blocks "
"long. Nothing to do!\n\n"), new_size);
exit(0);
}
if (!force && (fs->super->s_lastcheck < fs->super->s_mtime)) {
fprintf(stderr, _("Please run 'e2fsck -f %s' first.\n\n"),
device_name);
exit(1);
}
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 %d blocks long.\n\n"),
device_name, new_size);
return (0);
}