rfw_update_single
rfw_update_single(vp, lfs_fi_getblock(fs, fip, i), daddr, size);
rfw_update_single(vp, lbn, *dap, lfs_dblksize(fs, dp, lbn));
rfw_update_single(vp, i, lfs_dino_getdb(fs, dp, i),
rfw_update_single(vp, i, lfs_dino_getib(fs, dp, i), lfs_sb_getbsize(fs));