* [PATCH] vxlan: Add capability of Rx checksum offload for inner packet
@ 2012-12-07 2:05 Joseph Gasparakis
0 siblings, 0 replies; only message in thread
From: Joseph Gasparakis @ 2012-12-07 2:05 UTC (permalink / raw)
To: davem, shemminger, chrisw, gospo
Cc: Joseph Gasparakis, netdev, linux-kernel, alexander.h.duyck,
peter.p.waskiewicz.jr
This patch adds capability in vxlan to identify received
checksummed inner packets and signal them to the upper layers of
the stack. The driver needs to set the skb->encapsulation bit
and also set the skb->ip_summed to CHECKSUM_UNNECESSARY.
Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com>
---
drivers/net/vxlan.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 88b31f2..cf0231d 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -607,7 +607,12 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
__skb_tunnel_rx(skb, vxlan->dev);
skb_reset_network_header(skb);
- skb->ip_summed = CHECKSUM_NONE;
+
+ if (skb->ip_summed != CHECKSUM_UNNECESSARY || !skb->encapsulation ||
+ !(vxlan->dev->features & NETIF_F_RXCSUM))
+ skb->ip_summed = CHECKSUM_NONE;
+
+ skb->encapsulation = 0;
err = IP_ECN_decapsulate(oip, skb);
if (unlikely(err)) {
@@ -1175,7 +1180,9 @@ static void vxlan_setup(struct net_device *dev)
dev->features |= NETIF_F_LLTX;
dev->features |= NETIF_F_NETNS_LOCAL;
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
- dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+ dev->features |= NETIF_F_RXCSUM;
+
+ dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
spin_lock_init(&vxlan->hash_lock);
--
1.7.6.4
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2012-12-07 2:05 [PATCH] vxlan: Add capability of Rx checksum offload for inner packet Joseph Gasparakis
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