/*
* This function assumes it is being called from dev_queue_xmit()
* and that skb is filled properly by that function.
*/
static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *tiph;
struct iphdr fiph;
if (unlikely(skb->protocol != htons(ETH_P_IP)))
goto tx_error;
skb = iptunnel_handle_offloads(skb, false, SKB_GSO_IPIP);
if (IS_ERR(skb))
goto out;
if (ipip_tunnel_is_fan(tunnel)) {
if (ipip_build_fan_iphdr(tunnel, skb, &fiph))
goto tx_error;
tiph = &fiph;
} else {
tiph = &tunnel->parms.iph;
}
skb_set_inner_ipproto(skb, IPPROTO_IPIP);
ip_tunnel_xmit(skb, dev, tiph, tiph->protocol);
return NETDEV_TX_OK;
tx_error:
kfree_skb(skb);
out:
dev->stats.tx_errors++;
return NETDEV_TX_OK;
}
/*
* This function assumes it is being called from dev_queue_xmit()
* and that skb is filled properly by that function.
*/
static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *tiph = &tunnel->parms.iph;
u8 ipproto;
switch (skb->protocol) {
case htons(ETH_P_IP):
ipproto = IPPROTO_IPIP;
break;
#if IS_ENABLED(CONFIG_MPLS)
case htons(ETH_P_MPLS_UC):
ipproto = IPPROTO_MPLS;
break;
#endif
default:
goto tx_error;
}
if (tiph->protocol != ipproto && tiph->protocol != 0)
goto tx_error;
if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP4))
goto tx_error;
skb_set_inner_ipproto(skb, ipproto);
if (tunnel->collect_md)
ip_md_tunnel_xmit(skb, dev, ipproto);
else
ip_tunnel_xmit(skb, dev, tiph, ipproto);
return NETDEV_TX_OK;
tx_error:
kfree_skb(skb);
dev->stats.tx_errors++;
return NETDEV_TX_OK;
}
/*
* This function assumes it is being called from dev_queue_xmit()
* and that skb is filled properly by that function.
*/
static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *tiph = &tunnel->parms.iph;
struct net_device *mcdev; /* madcap device */
#ifdef OVBENCH
if (SKB_OVBENCH (skb)) {
skb->ipip_tunnel_xmit_in = rdtsc ();
}
#endif
if (unlikely(skb->protocol != htons(ETH_P_IP)))
goto tx_error;
skb = iptunnel_handle_offloads(skb, false, SKB_GSO_IPIP);
if (IS_ERR(skb))
goto out;
if (madcap_enable) {
mcdev = __dev_get_by_index (dev_net (dev), tunnel->parms.link);
if (mcdev && get_madcap_ops (mcdev)) {
madcap_queue_xmit (skb, mcdev);
return NETDEV_TX_OK;
}
}
skb_set_inner_ipproto(skb, IPPROTO_IPIP);
ip_tunnel_xmit(skb, dev, tiph, tiph->protocol);
return NETDEV_TX_OK;
tx_error:
kfree_skb(skb);
out:
dev->stats.tx_errors++;
return NETDEV_TX_OK;
}
