1 /***
2 This file is part of systemd.
3
4 Copyright 2012 Kay Sievers <kay@vrfy.org>
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include <unistd.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <stdio.h>
24 #include <fcntl.h>
25 #include <errno.h>
26 #include <sys/ioctl.h>
27
28 #ifdef HAVE_LINUX_BTRFS_H
29 #include <linux/btrfs.h>
30 #endif
31
32 #include "missing.h"
33 #include "udev.h"
34
builtin_btrfs(struct udev_device * dev,int argc,char * argv[],bool test)35 static int builtin_btrfs(struct udev_device *dev, int argc, char *argv[], bool test) {
36 struct btrfs_ioctl_vol_args args = {};
37 _cleanup_close_ int fd = -1;
38 int err;
39
40 if (argc != 3 || !streq(argv[1], "ready"))
41 return EXIT_FAILURE;
42
43 fd = open("/dev/btrfs-control", O_RDWR|O_CLOEXEC);
44 if (fd < 0)
45 return EXIT_FAILURE;
46
47 strscpy(args.name, sizeof(args.name), argv[2]);
48 err = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
49 if (err < 0)
50 return EXIT_FAILURE;
51
52 udev_builtin_add_property(dev, test, "ID_BTRFS_READY", one_zero(err == 0));
53 return EXIT_SUCCESS;
54 }
55
56 const struct udev_builtin udev_builtin_btrfs = {
57 .name = "btrfs",
58 .cmd = builtin_btrfs,
59 .help = "btrfs volume management",
60 };
61