66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/***
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This file is part of systemd.
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Copyright 2012 Kay Sievers <kay@vrfy.org>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include "udev.h"
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#define BTRFS_PATH_NAME_MAX 4087
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struct btrfs_ioctl_vol_args {
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int64_t fd;
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char name[BTRFS_PATH_NAME_MAX + 1];
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};
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#define BTRFS_IOCTL_MAGIC 0x94
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#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, struct btrfs_ioctl_vol_args)
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static int builtin_btrfs(struct udev_device *dev, int argc, char *argv[], bool test)
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{
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struct btrfs_ioctl_vol_args args;
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int fd;
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int err;
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if (argc != 3 || !streq(argv[1], "ready"))
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return EXIT_FAILURE;
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fd = open("/dev/btrfs-control", O_RDWR);
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if (fd < 0)
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return EXIT_FAILURE;
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util_strscpy(args.name, sizeof(args.name), argv[2]);
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err = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
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close(fd);
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if (err < 0)
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return EXIT_FAILURE;
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udev_builtin_add_property(dev, test, "ID_BTRFS_READY", err == 0 ? "1" : "0");
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return EXIT_SUCCESS;
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}
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const struct udev_builtin udev_builtin_btrfs = {
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.name = "btrfs",
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.cmd = builtin_btrfs,
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.help = "btrfs volume management",
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};
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