vte_tx_desc
struct vte_tx_desc *desc;
sizeof(struct vte_tx_desc) * (i + 1);
sizeof(struct vte_tx_desc) * 0;
(sizeof(struct vte_tx_desc) * VTE_TX_RING_CNT)
struct vte_tx_desc *tx_desc;
struct vte_tx_desc *vte_tx_ring;