xfs_btree_key_from_irec
xfs_btree_key_from_irec(cur, &high_key, high_rec);
xfs_btree_key_from_irec(cur, &low_key, low_rec);
xfs_btree_key_from_irec(cur, &info.start_key, low);
xfs_btree_key_from_irec(cur, &info.end_key, high);