xfs_fsmap_owner_to_rmap
error = xfs_fsmap_owner_to_rmap(&info->low, &keys[0]);
error = xfs_fsmap_owner_to_rmap(&info->high, &keys[1]);
error = xfs_fsmap_owner_to_rmap(&info->low, &key0);
error = xfs_fsmap_owner_to_rmap(&info->high, &keys[1]);