3151 	struct btrfs_ioctl_dev_info_args *di_args;  in btrfs_ioctl_dev_info()  local
3156 	di_args = memdup_user(arg, sizeof(*di_args));  in btrfs_ioctl_dev_info()
3157 	if (IS_ERR(di_args))  in btrfs_ioctl_dev_info()
3158 		return PTR_ERR(di_args);  in btrfs_ioctl_dev_info()
3160 	if (!btrfs_is_empty_uuid(di_args->uuid))  in btrfs_ioctl_dev_info()
3161 		s_uuid = di_args->uuid;  in btrfs_ioctl_dev_info()
3164 	dev = btrfs_find_device(fs_info, di_args->devid, s_uuid, NULL);  in btrfs_ioctl_dev_info()
3171 	di_args->devid = dev->devid;  in btrfs_ioctl_dev_info()
3172 	di_args->bytes_used = btrfs_device_get_bytes_used(dev);  in btrfs_ioctl_dev_info()
3173 	di_args->total_bytes = btrfs_device_get_total_bytes(dev);  in btrfs_ioctl_dev_info()
3174 	memcpy(di_args->uuid, dev->uuid, sizeof(di_args->uuid));  in btrfs_ioctl_dev_info()
3176 		strncpy(di_args->path, rcu_str_deref(dev->name),  in btrfs_ioctl_dev_info()
3177 				sizeof(di_args->path) - 1);  in btrfs_ioctl_dev_info()
3178 		di_args->path[sizeof(di_args->path) - 1] = 0;  in btrfs_ioctl_dev_info()
3180 		di_args->path[0] = '\0';  in btrfs_ioctl_dev_info()
3185 	if (ret == 0 && copy_to_user(arg, di_args, sizeof(*di_args)))  in btrfs_ioctl_dev_info()
3188 	kfree(di_args);  in btrfs_ioctl_dev_info()