3310 	struct btrfs_ioctl_dev_info_args *di_args;  in btrfs_ioctl_dev_info()  local
3315 	di_args = memdup_user(arg, sizeof(*di_args));  in btrfs_ioctl_dev_info()
3316 	if (IS_ERR(di_args))  in btrfs_ioctl_dev_info()
3317 		return PTR_ERR(di_args);  in btrfs_ioctl_dev_info()
3319 	if (!btrfs_is_empty_uuid(di_args->uuid))  in btrfs_ioctl_dev_info()
3320 		s_uuid = di_args->uuid;  in btrfs_ioctl_dev_info()
3323 	dev = btrfs_find_device(fs_info->fs_devices, di_args->devid, s_uuid,  in btrfs_ioctl_dev_info()
3331 	di_args->devid = dev->devid;  in btrfs_ioctl_dev_info()
3332 	di_args->bytes_used = btrfs_device_get_bytes_used(dev);  in btrfs_ioctl_dev_info()
3333 	di_args->total_bytes = btrfs_device_get_total_bytes(dev);  in btrfs_ioctl_dev_info()
3334 	memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid));  in btrfs_ioctl_dev_info()
3336 		strncpy(di_args->path, rcu_str_deref(dev->name),  in btrfs_ioctl_dev_info()
3337 				sizeof(di_args->path) - 1);  in btrfs_ioctl_dev_info()
3338 		di_args->path[sizeof(di_args->path) - 1] = 0;  in btrfs_ioctl_dev_info()
3340 		di_args->path[0] = '\0';  in btrfs_ioctl_dev_info()
3345 	if (ret == 0 && copy_to_user(arg, di_args, sizeof(*di_args)))  in btrfs_ioctl_dev_info()
3348 	kfree(di_args);  in btrfs_ioctl_dev_info()