int main(int argc, char *argv[]) {
char * bytes_count_str = NULL;
char * devname;
reiserfs_filsys_t fs;
struct reiserfs_super_block * rs;
int c;
int error;
struct reiserfs_super_block *sb_old;
unsigned long block_count_new;
print_banner ("resize_reiserfs");
while ((c = getopt(argc, argv, "fvcqs:")) != EOF) {
switch (c) {
case 's' :
if (!optarg)
die("%s: Missing argument to -s option", argv[0]);
bytes_count_str = optarg;
break;
case 'f':
opt_force = 1;
break;
case 'v':
opt_verbose++;
break;
case 'n':
/* no nowrite option at this moment */
/* opt_nowrite = 1; */
break;
case 'c':
opt_safe = 1;
break;
case 'q':
opt_verbose = 0;
break;
default:
print_usage_and_exit ();
}
}
if (optind == argc )
print_usage_and_exit();
devname = argv[optind];
fs = reiserfs_open(devname, O_RDONLY, &error, 0);
if (!fs)
die ("%s: can not open '%s': %s", argv[0], devname, strerror(error));
if (no_reiserfs_found (fs)) {
die ("resize_reiserfs: no reiserfs found on the device");
}
if (!spread_bitmaps (fs)) {
die ("resize_reiserfs: cannot resize reiserfs in old (not spread bitmap) format.\n");
}
rs = fs->s_rs;
if(bytes_count_str) { /* new fs size is specified by user */
block_count_new = calc_new_fs_size(rs_block_count(rs), fs->s_blocksize, bytes_count_str);
} else { /* use whole device */
block_count_new = count_blocks(devname, fs->s_blocksize, -1);
}
if (is_mounted (devname)) {
reiserfs_close(fs);
return resize_fs_online(devname, block_count_new);
}
if (rs_state(rs) != REISERFS_VALID_FS)
die ("%s: the file system isn't in valid state\n", argv[0]);
if(!valid_offset(fs->s_dev, (loff_t) block_count_new * fs->s_blocksize - 1))
die ("%s: %s too small", argv[0], devname);
sb_old = 0; /* Needed to keep idiot compiler from issuing false warning */
/* save SB for reporting */
if(opt_verbose) {
sb_old = getmem(SB_SIZE);
memcpy(sb_old, SB_DISK_SUPER_BLOCK(fs), SB_SIZE);
}
if (block_count_new == SB_BLOCK_COUNT(fs))
die ("%s: Calculated fs size is the same as the previous one.", argv[0]);
if (block_count_new > SB_BLOCK_COUNT(fs))
expand_fs(fs, block_count_new);
else
shrink_fs(fs, block_count_new);
if(opt_verbose) {
sb_report(rs, sb_old);
freemem(sb_old);
}
set_state (rs, REISERFS_VALID_FS);
bwrite_cond(SB_BUFFER_WITH_SB(fs));
if (opt_verbose) {
printf("\nSyncing..");
fflush(stdout);
}
reiserfs_close (fs);
if (opt_verbose)
printf("done\n");
return 0;
}
int main(int argc, char *argv[]) {
char * bytes_count_str = NULL;
char * devname;
struct stat statbuf;
int c;
int dev;
struct reiserfs_super_block *sb, *sb_old;
while ((c = getopt(argc, argv, "fvcqs:")) != EOF) {
switch (c) {
case 's' :
if (!optarg)
die("%s: Missing argument to -s option", argv[0]);
bytes_count_str = optarg;
break;
case 'f':
opt_force = 1;
break;
case 'v':
opt_verbose++;
break;
case 'n':
/* no nowrite option at this moment */
/* opt_nowrite = 1; */
break;
case 'c':
opt_safe = 1;
break;
case 'q':
opt_verbose = 0;
break;
default:
print_usage_and_exit ();
}
}
if (optind == argc || (!bytes_count_str))
print_usage_and_exit();
devname = argv[optind];
/* open_device will die if it could not open device */
dev = open (devname, O_RDWR);
if (dev == -1)
die ("%s: can not open '%s': %s", argv[0], devname, strerror (errno));
if (fstat (dev, &statbuf) < 0)
die ("%s: unable to stat %s", argv[0], devname);
if (!S_ISBLK (statbuf.st_mode) && opt_force )
die ("%s: '%s (%o)' is not a block device",
argv[0], devname, statbuf.st_mode);
read_superblock(dev);
sb = (struct reiserfs_super_block *) g_sb_bh->b_data;
g_block_count_new = calc_new_fs_size(sb->s_block_count,
sb->s_blocksize, bytes_count_str);
if (is_mounted (devname)) {
close(dev);
if (!opt_force)
die ("%s: '%s' contains a mounted file system,\n"
"\tspecify -f option to resize the fs online\n",
argv[0], devname);
resize_fs_online(devname, g_block_count_new);
return 0;
}
if (sb->s_state != REISERFS_VALID_FS)
die ("%s: the file system isn't in valid state\n", argv[0]);
if(!valid_offset(dev, (loff_t) g_block_count_new * sb->s_blocksize - 1))
die ("%s: %s too small", argv[0], devname);
sb_old = 0; /* Needed to keep idiot compiler from issuing false warning */
/* save SB for reporting */
if(opt_verbose) {
sb_old = getmem(sizeof(struct reiserfs_super_block));
memcpy(sb_old, sb, sizeof(struct reiserfs_super_block));
}
if (g_block_count_new == sb->s_block_count)
die ("%s: Calculated fs size is the same as the previous one.",
argv[0]);
if (g_block_count_new > sb->s_block_count)
expand_fs();
else
shrink_fs(g_block_count_new);
if(opt_verbose) {
sb_report(sb, sb_old);
freemem(sb_old);
}
check_and_free_mem ();
if (opt_verbose) {
printf("\nSyncing..");
fflush(stdout);
}
fsync (dev);
if (opt_verbose)
printf("done\n");
close(dev);
return 0;
}
