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vxlan: Bypass encapsulation if the destination is local 

This patch bypasses vxlan encapsulation if the destination vxlan
endpoint is a local device.

Changes since v1: added missing check for vxlan_find_vni() failure

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sridhar Samudrala 2013-04-02 12:31:52 +00:00 committed by David S. Miller
parent c4637cdf48
commit 9dcc71e1fd
1 changed files with 43 additions and 16 deletions
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59
drivers/net/vxlan.c
View File

@ -912,6 +912,36 @@ static int handle_offloads(struct sk_buff *skb)
return 0;
}
/* Bypass encapsulation if the destination is local */
static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
struct vxlan_dev *dst_vxlan)
{
struct pcpu_tstats *tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
struct pcpu_tstats *rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
skb->pkt_type = PACKET_HOST;
skb->encapsulation = 0;
skb->dev = dst_vxlan->dev;
__skb_pull(skb, skb_network_offset(skb));
if (dst_vxlan->flags & VXLAN_F_LEARN)
vxlan_snoop(skb->dev, INADDR_LOOPBACK, eth_hdr(skb)->h_source);
u64_stats_update_begin(&tx_stats->syncp);
tx_stats->tx_packets++;
tx_stats->tx_bytes += skb->len;
u64_stats_update_end(&tx_stats->syncp);
if (netif_rx(skb) == NET_RX_SUCCESS) {
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->rx_packets++;
rx_stats->rx_bytes += skb->len;
u64_stats_update_end(&rx_stats->syncp);
} else {
skb->dev->stats.rx_dropped++;
}
}
static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
struct vxlan_rdst *rdst, bool did_rsc)
{
@ -922,7 +952,6 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
struct vxlanhdr *vxh;
struct udphdr *uh;
struct flowi4 fl4;
unsigned int pkt_len = skb->len;
__be32 dst;
__u16 src_port, dst_port;
u32 vni;
@ -935,22 +964,8 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
if (!dst) {
if (did_rsc) {
__skb_pull(skb, skb_network_offset(skb));
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_HOST;
/* short-circuited back to local bridge */
if (netif_rx(skb) == NET_RX_SUCCESS) {
struct pcpu_tstats *stats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&stats->syncp);
stats->tx_packets++;
stats->tx_bytes += pkt_len;
u64_stats_update_end(&stats->syncp);
} else {
dev->stats.tx_errors++;
dev->stats.tx_aborted_errors++;
}
vxlan_encap_bypass(skb, vxlan, vxlan);
return NETDEV_TX_OK;
}
goto drop;
@ -997,6 +1012,18 @@ static netdev_tx_t vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
goto tx_error;
}
/* Bypass encapsulation if the destination is local */
if (rt->rt_flags & RTCF_LOCAL) {
struct vxlan_dev *dst_vxlan;
ip_rt_put(rt);
dst_vxlan = vxlan_find_vni(dev_net(dev), vni);
if (!dst_vxlan)
goto tx_error;
vxlan_encap_bypass(skb, vxlan, dst_vxlan);
return NETDEV_TX_OK;
}
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
IPSKB_REROUTED);