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/*
* main.c --- ext2 resizer main program
*
* Copyright (C) 1997 Theodore Ts'o
*
* %Begin-Header%
* All rights reserved.
* %End-Header%
*/
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include <fcntl.h>
#include <sys/ioctl.h>
#include "resize2fs.h"
#include "../version.h"
char *program_name, *device_name;
static volatile void usage (char *prog)
{
fprintf (stderr, "usage: %s [-d debug_flags] [-f] [-F] [-p] device new-size\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_name)
{
errcode_t retval;
int mount_flags;
retval = ext2fs_check_if_mounted(device_name, &mount_flags);
if (retval) {
com_err("ext2fs_check_if_mount", retval,
"while determining whether %s is mounted.",
device_name);
return;
}
if (!(mount_flags & EXT2_MF_MOUNTED))
return;
fprintf(stderr, "%s is mounted; can't resize a "
"mounted filesystem!\n\n", device_name);
exit(1);
}
void 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;
initialize_ext2_error_table();
fprintf (stderr, "resize2fs %s, %s for EXT2 FS %s, %s\n",
E2FSPROGS_VERSION, E2FSPROGS_DATE,
EXT2FS_VERSION, EXT2FS_DATE);
fprintf(stderr, "Copyright 1998 by Theodore Ts'o and PowerQuest, Inc. All Rights Reserved.\n\n");
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) {
#ifdef BLKFLSBUF
fd = open(device_name, O_RDONLY, 0);
if (fd < 0) {
com_err("open", errno, "while opening %s for flushing",
device_name);
exit(1);
}
if (ioctl(fd, BLKFLSBUF, 0) < 0) {
com_err("BLKFLSBUF", errno, "while trying to flush %s",
device_name);
exit(1);
}
close(fd);
#else
fprintf(stderr, "BLKFLSBUF not supported");
exit(1);
#endif /* BLKFLSBUF */
}
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);
}
/*
* 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 (!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 (0);
}
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