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veth: extend features to support tunneling 

While investigating on a recent vxlan regression, I found veth
was using a zero features set for vxlan tunnels.

We have to segment GSO frames, copy the payload, and do the checksum.

This patch brings a ~200% performance increase

We probably have to add hw_enc_features support
on other virtual devices.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-10-25 18:25:03 -07:00 committed by David S. Miller
parent 8c3a897bfa
commit 82d8189826
1 changed files with 3 additions and 0 deletions
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3
drivers/net/veth.c
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@ -261,6 +261,8 @@ static const struct net_device_ops veth_netdev_ops = {
#define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
NETIF_F_HW_CSUM | NETIF_F_RXCSUM | NETIF_F_HIGHDMA | \
NETIF_F_GSO_GRE | NETIF_F_GSO_UDP_TUNNEL | \
NETIF_F_GSO_IPIP | NETIF_F_GSO_SIT | NETIF_F_UFO | \
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | \
NETIF_F_HW_VLAN_STAG_TX | NETIF_F_HW_VLAN_STAG_RX )
@ -279,6 +281,7 @@ static void veth_setup(struct net_device *dev)
dev->destructor = veth_dev_free;
dev->hw_features = VETH_FEATURES;
dev->hw_enc_features = VETH_FEATURES;
}
/*