DMU_OST_META
if (spa->spa_mos.os_type != DMU_OST_META) {
if (dds.dds_type == DMU_OST_META) {
VERIFY_OS_TYPE(osp, DMU_OST_META);
os->os_phys->os_type == DMU_OST_META);
NULL, &dp->dp_meta_rootbp, DMU_OST_META, tx);