C++ (Cpp) linux_netmap_start_xmitの例

コード例 #1

ファイル: netmap_linux.c プロジェクト: chenfangxin/vsec_disp

/* Replacement for the driver ndo_start_xmit() method.
 * When this function is invoked because of the dev_queue_xmit() call
 * in generic_xmit_frame() (e.g. because of a txsync on the NIC), we have
 * to call the original ndo_start_xmit() method.
 * In all the other cases (e.g. when the TX request comes from the network
 * stack) we intercept the packet and put it into the RX ring associated
 * to the host stack.
 */
static netdev_tx_t
generic_ndo_start_xmit(struct mbuf *m, struct ifnet *ifp)
{
    struct netmap_generic_adapter *gna =
                        (struct netmap_generic_adapter *)NA(ifp);

    if (likely(m->priority == NM_MAGIC_PRIORITY_TX))
        return gna->save_start_xmit(m, ifp); /* To the driver. */

    /* To a netmap RX ring. */
    return linux_netmap_start_xmit(m, ifp);
}

コード例 #2

ファイル: netmap_linux.c プロジェクト: JaseFace/netmap

/* Replacement for the driver ndo_start_xmit() method.
 * When this function is invoked because of the dev_queue_xmit() call
 * in generic_xmit_frame() (e.g. because of a txsync on the NIC), we have
 * to call the original ndo_start_xmit() method.
 * In all the other cases (e.g. when the TX request comes from the network
 * stack) we intercept the packet and put it into the RX ring associated
 * to the host stack.
 */
static netdev_tx_t
generic_ndo_start_xmit(struct mbuf *m, struct ifnet *ifp)
{
	struct netmap_generic_adapter *gna =
		(struct netmap_generic_adapter *)NA(ifp);

	if (likely(m->priority == NM_MAGIC_PRIORITY_TX)) {
		/* Reset priority, so that generic_netmap_tx_clean()
		 * knows that it can reclaim this mbuf. */
		m->priority = 0;
		return gna->save_start_xmit(m, ifp); /* To the driver. */
	}

	/* To a netmap RX ring. */
	return linux_netmap_start_xmit(m, ifp);
}