src/udev/udev-builtin-btrfs.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <fcntl.h>
   4 #include <stdlib.h>
   5 #include <sys/ioctl.h>
   6
   7 #include "device-util.h"
   8 #include "fd-util.h"
   9 #include "missing.h"
  10 #include "string-util.h"
  11 #include "strxcpyx.h"
  12 #include "udev-builtin.h"
  13 #include "util.h"
  14
  15 static int builtin_btrfs(sd_device *dev, int argc, char *argv[], bool test) {
  16         struct btrfs_ioctl_vol_args args = {};
  17         _cleanup_close_ int fd = -1;
  18         int r;
  19
  20         if (argc != 3 || !streq(argv[1], "ready"))
  21                 return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "Invalid arguments");
  22
  23         fd = open("/dev/btrfs-control", O_RDWR|O_CLOEXEC);
  24         if (fd < 0)
  25                 return log_device_debug_errno(dev, errno, "Failed to open /dev/btrfs-control: %m");
  26
  27         strscpy(args.name, sizeof(args.name), argv[2]);
  28         r = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
  29         if (r < 0)
  30                 return log_device_debug_errno(dev, errno, "Failed to call BTRFS_IOC_DEVICES_READY: %m");
  31
  32         udev_builtin_add_property(dev, test, "ID_BTRFS_READY", one_zero(r == 0));
  33         return 0;
  34 }
  35
  36 const struct udev_builtin udev_builtin_btrfs = {
  37         .name = "btrfs",
  38         .cmd = builtin_btrfs,
  39         .help = "btrfs volume management",
  40 };