From 9dcc71e1fdbb7aa10d92a3d35e8a201adc84abd0 Mon Sep 17 00:00:00 2001 From: Sridhar Samudrala Date: Tue, 2 Apr 2013 12:31:52 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 59 ++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 43 insertions(+), 16 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 62a4438..9a64715 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -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); -- 2.7.4