dnode_new_blkid
dnode_new_blkid(dn, db->db_blkid, tx,
dnode_new_blkid(dn, maxblkid, tx, B_FALSE, B_TRUE);
dnode_new_blkid(mdn, maxblkid, tx, B_FALSE, B_TRUE);
void dnode_new_blkid(dnode_t *dn, uint64_t blkid, dmu_tx_t *tx,