DMU_POOL_ROOT_DATASET
if (zap_lookup(spa, &dir, DMU_POOL_ROOT_DATASET, sizeof (dir_obj),
if (zap_lookup(spa, &dir, DMU_POOL_ROOT_DATASET,
if (errnum = zap_lookup(mdn, DMU_POOL_ROOT_DATASET, &objnum,
DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1, &ddobj, tx));
DMU_POOL_ROOT_DATASET, sizeof (uint64_t), 1,