ZPROP_HAS_RECVD
dsl_prop_get_integer(dsname, ZPROP_HAS_RECVD, &dummy, NULL));
error = dsl_prop_set_int(dsname, ZPROP_HAS_RECVD, source, 0);
dsl_prop_get_int_ds(ds, ZPROP_HAS_RECVD, &dummy) == 0) {