1#val_type uint64_t 2BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 3BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 4BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 5BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 6