158 lines
3.4 KiB
C
158 lines
3.4 KiB
C
/*
|
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#define _XOPEN_SOURCE 500
|
|
#define _GNU_SOURCE 1
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <dirent.h>
|
|
#include "kerncompat.h"
|
|
#include "ctree.h"
|
|
#include "disk-io.h"
|
|
#include "transaction.h"
|
|
#include "utils.h"
|
|
#include "version.h"
|
|
|
|
static char *device;
|
|
|
|
int update_seeding_flag(struct btrfs_root *root, int set_flag)
|
|
{
|
|
struct btrfs_trans_handle *trans;
|
|
struct btrfs_super_block *disk_super;
|
|
u64 super_flags;
|
|
|
|
disk_super = root->fs_info->super_copy;
|
|
super_flags = btrfs_super_flags(disk_super);
|
|
if (set_flag) {
|
|
if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
|
|
fprintf(stderr, "seeding flag is already set on %s\n",
|
|
device);
|
|
return 1;
|
|
}
|
|
super_flags |= BTRFS_SUPER_FLAG_SEEDING;
|
|
} else {
|
|
if (!(super_flags & BTRFS_SUPER_FLAG_SEEDING)) {
|
|
fprintf(stderr, "seeding flag is not set on %s\n",
|
|
device);
|
|
return 1;
|
|
}
|
|
super_flags &= ~BTRFS_SUPER_FLAG_SEEDING;
|
|
}
|
|
|
|
trans = btrfs_start_transaction(root, 1);
|
|
btrfs_set_super_flags(disk_super, super_flags);
|
|
btrfs_commit_transaction(trans, root);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int enable_extrefs_flag(struct btrfs_root *root)
|
|
{
|
|
struct btrfs_trans_handle *trans;
|
|
struct btrfs_super_block *disk_super;
|
|
u64 super_flags;
|
|
|
|
disk_super = root->fs_info->super_copy;
|
|
super_flags = btrfs_super_incompat_flags(disk_super);
|
|
super_flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
|
|
trans = btrfs_start_transaction(root, 1);
|
|
btrfs_set_super_incompat_flags(disk_super, super_flags);
|
|
btrfs_commit_transaction(trans, root);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void print_usage(void)
|
|
{
|
|
fprintf(stderr, "usage: btrfstune [options] device\n");
|
|
fprintf(stderr, "\t-S value\tenable/disable seeding\n");
|
|
fprintf(stderr, "\t-r \t\tenable extended inode refs\n");
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct btrfs_root *root;
|
|
int success = 0;
|
|
int extrefs_flag = 0;
|
|
int seeding_flag = 0;
|
|
int seeding_value = 0;
|
|
int ret;
|
|
|
|
while(1) {
|
|
int c = getopt(argc, argv, "S:r");
|
|
if (c < 0)
|
|
break;
|
|
switch(c) {
|
|
case 'S':
|
|
seeding_flag = 1;
|
|
seeding_value = atoi(optarg);
|
|
break;
|
|
case 'r':
|
|
extrefs_flag = 1;
|
|
break;
|
|
default:
|
|
print_usage();
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
argc = argc - optind;
|
|
device = argv[optind];
|
|
if (argc != 1) {
|
|
print_usage();
|
|
return 1;
|
|
}
|
|
|
|
if (check_mounted(device)) {
|
|
fprintf(stderr, "%s is mounted\n", device);
|
|
return 1;
|
|
}
|
|
|
|
root = open_ctree(device, 0, 1);
|
|
|
|
if (!root) {
|
|
fprintf(stderr, "Open ctree failed\n");
|
|
return 1;
|
|
}
|
|
|
|
if (seeding_flag) {
|
|
ret = update_seeding_flag(root, seeding_value);
|
|
if (!ret)
|
|
success++;
|
|
}
|
|
|
|
if (extrefs_flag) {
|
|
enable_extrefs_flag(root);
|
|
success++;
|
|
}
|
|
|
|
if (success > 0) {
|
|
ret = 0;
|
|
} else {
|
|
root->fs_info->readonly = 1;
|
|
ret = 1;
|
|
}
|
|
close_ctree(root);
|
|
|
|
return ret;
|
|
}
|