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net: Add GSO support for UDP tunnels with checksum

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Added a new netif feature for GSO_UDP_TUNNEL_CSUM. This indicates
that a device is capable of computing the UDP checksum in the
encapsulating header of a UDP tunnel.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2014-06-04 17:20:16 -07:00 • committed by David S. Miller
commit 0f4f4ffa7b
8 changed files with 31 additions and 23 deletions
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1
include/linux/netdev_features.h
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@ -45,6 +45,7 @@ enum {
NETIF_F_GSO_IPIP_BIT, /* ... IPIP tunnel with TSO */
NETIF_F_GSO_SIT_BIT, /* ... SIT tunnel with TSO */
NETIF_F_GSO_UDP_TUNNEL_BIT, /* ... UDP TUNNEL with TSO */
NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT,/* ... UDP TUNNEL with TSO & CSUM */
NETIF_F_GSO_MPLS_BIT, /* ... MPLS segmentation */
/**/NETIF_F_GSO_LAST = /* last bit, see GSO_MASK */
NETIF_F_GSO_MPLS_BIT,

2
include/linux/skbuff.h
View file

@ -345,6 +345,8 @@ enum {
SKB_GSO_UDP_TUNNEL = 1 << 9,
SKB_GSO_MPLS = 1 << 10,
SKB_GSO_UDP_TUNNEL_CSUM = 1 << 11,
};
#if BITS_PER_LONG > 32