static netdev_tx_t gre_tap_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
if (OVTYPE_IS_GRETAP (skb)) {
gretap_gre_tap_xmit_in (skb) = rdtsc ();
}
skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM));
if (IS_ERR(skb))
goto out;
if (skb_cow_head(skb, dev->needed_headroom))
goto free_skb;
__gre_xmit(skb, dev, &tunnel->parms.iph, htons(ETH_P_TEB));
return NETDEV_TX_OK;
free_skb:
kfree_skb(skb);
out:
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
static netdev_tx_t ipgre_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *tnl_params;
if (OVTYPE_IS_GRE (skb)) {
gre_ipgre_xmit_in (skb) = rdtsc ();
}
if (dev->header_ops) {
/* Need space for new headers */
if (skb_cow_head(skb, dev->needed_headroom -
(tunnel->hlen + sizeof(struct iphdr))))
goto free_skb;
tnl_params = (const struct iphdr *)skb->data;
/* Pull skb since ip_tunnel_xmit() needs skb->data pointing
* to gre header.
*/
skb_pull(skb, tunnel->hlen + sizeof(struct iphdr));
skb_reset_mac_header(skb);
} else {
if (skb_cow_head(skb, dev->needed_headroom))
goto free_skb;
tnl_params = &tunnel->parms.iph;
}
skb = gre_handle_offloads(skb, !!(tunnel->parms.o_flags&TUNNEL_CSUM));
if (IS_ERR(skb))
goto out;
__gre_xmit(skb, dev, tnl_params, skb->protocol);
return NETDEV_TX_OK;
free_skb:
kfree_skb(skb);
out:
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
static netdev_tx_t gre_tap_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
skb = handle_offloads(tunnel, skb);
if (IS_ERR(skb))
goto out;
if (skb_cow_head(skb, dev->needed_headroom))
goto free_skb;
__gre_xmit(skb, dev, &tunnel->parms.iph, htons(ETH_P_TEB));
return NETDEV_TX_OK;
free_skb:
dev_kfree_skb(skb);
out:
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
static netdev_tx_t ipgre_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ip_tunnel *tunnel = netdev_priv(dev);
const struct iphdr *tnl_params;
skb = handle_offloads(tunnel, skb);
if (IS_ERR(skb))
goto out;
if (dev->header_ops) {
/* Need space for new headers */
if (skb_cow_head(skb, dev->needed_headroom -
(tunnel->hlen + sizeof(struct iphdr))))
goto free_skb;
tnl_params = (const struct iphdr *)skb->data;
/* Pull skb since ip_tunnel_xmit() needs skb->data pointing
* to gre header.
*/
skb_pull(skb, tunnel->hlen + sizeof(struct iphdr));
} else {
if (skb_cow_head(skb, dev->needed_headroom))
goto free_skb;
tnl_params = &tunnel->parms.iph;
}
__gre_xmit(skb, dev, tnl_params, skb->protocol);
return NETDEV_TX_OK;
free_skb:
dev_kfree_skb(skb);
out:
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
