xchk_btree_cur_fsbno
xfs_fsblock_t fsbno = xchk_btree_cur_fsbno(cur, level);
xfs_fsblock_t fsbno = xchk_btree_cur_fsbno(cur, level);
xfs_fsblock_t fsbno = xchk_btree_cur_fsbno(cur, level);
xfs_fsblock_t fsbno = xchk_btree_cur_fsbno(cur, level);
xfs_fsblock_t fsbno = xchk_btree_cur_fsbno(cur, level);