xfs_btree_dup_cursor
error = xfs_btree_dup_cursor(cur, &tcur);
error = xfs_btree_dup_cursor(cur, &tcur);
error = xfs_btree_dup_cursor(cur, curp);
error = xfs_btree_dup_cursor(cur, &tcur);
xfs_btree_dup_cursor(
error = xfs_btree_dup_cursor(cur, &tcur);
error = xfs_btree_dup_cursor(lcur, &rcur);
error = xfs_btree_dup_cursor(cur, &ncur);