2 * Copyright (C) 2008 Morey Roof. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
22 #include <sys/ioctl.h>
23 #include <sys/mount.h>
25 #endif /* __CHECKER__ */
29 #include <sys/types.h>
35 #include <linux/limits.h>
37 #include "kerncompat.h"
42 #include "transaction.h"
49 static void change_label_unmounted(char *dev, char *nLabel)
51 struct btrfs_root *root;
52 struct btrfs_trans_handle *trans;
54 /* Open the super_block at the default location
57 root = open_ctree(dev, 0, 1);
59 trans = btrfs_start_transaction(root, 1);
60 strncpy(root->fs_info->super_copy.label, nLabel, BTRFS_LABEL_SIZE);
61 btrfs_commit_transaction(trans, root);
63 /* Now we close it since we are done. */
67 static void get_label_unmounted(char *dev)
69 struct btrfs_root *root;
71 /* Open the super_block at the default location
74 root = open_ctree(dev, 0, 0);
76 fprintf(stdout, "%s\n", root->fs_info->super_copy.label);
78 /* Now we close it since we are done. */
82 int get_label(char *btrfs_dev)
86 ret = check_mounted(btrfs_dev);
89 fprintf(stderr, "FATAL: error checking %s mount status\n", btrfs_dev);
95 fprintf(stderr, "FATAL: the filesystem has to be unmounted\n");
98 get_label_unmounted(btrfs_dev);
103 int set_label(char *btrfs_dev, char *nLabel)
107 ret = check_mounted(btrfs_dev);
110 fprintf(stderr, "FATAL: error checking %s mount status\n", btrfs_dev);
116 fprintf(stderr, "FATAL: the filesystem has to be unmounted\n");
119 change_label_unmounted(btrfs_dev, nLabel);