dsl_dir_transfer_space
dsl_dir_transfer_space(ds->ds_dir, used - delta,
dsl_dir_transfer_space(ds->ds_dir, -used - delta,
dsl_dir_transfer_space(ds->ds_dir, used,
dsl_dir_transfer_space(origin_head->ds_dir, cdl_used - odl_used,
dsl_dir_transfer_space(dd->dd_parent,
void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,