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authorJoe Stringer <joestringer@nicira.com>2014-11-13 16:38:12 -0800
committerDavid S. Miller <davem@davemloft.net>2014-11-14 17:12:48 -0500
commit23e62de33d179e229e4c1dfd93f90a3c7355c519 (patch)
treea08dd11592ac4910158cb478749b092cb81317b0 /include
parent8a5809e0dd83831ff38f027786428031289505e6 (diff)
net: Add vxlan_gso_check() helper
Most NICs that report NETIF_F_GSO_UDP_TUNNEL support VXLAN, and not other UDP-based encapsulation protocols where the format and size of the header differs. This patch implements a generic ndo_gso_check() for VXLAN which will only advertise GSO support when the skb looks like it contains VXLAN (or no UDP tunnelling at all). Implementation shamelessly stolen from Tom Herbert: http://thread.gmane.org/gmane.linux.network/332428/focus=333111 Signed-off-by: Joe Stringer <joestringer@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/vxlan.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/vxlan.h b/include/net/vxlan.h
index d5f59f3fc35d..afadf8e53f20 100644
--- a/include/net/vxlan.h
+++ b/include/net/vxlan.h
@@ -45,6 +45,8 @@ int vxlan_xmit_skb(struct vxlan_sock *vs,
__be32 src, __be32 dst, __u8 tos, __u8 ttl, __be16 df,
__be16 src_port, __be16 dst_port, __be32 vni, bool xnet);
+bool vxlan_gso_check(struct sk_buff *skb);
+
/* IP header + UDP + VXLAN + Ethernet header */
#define VXLAN_HEADROOM (20 + 8 + 8 + 14)
/* IPv6 header + UDP + VXLAN + Ethernet header */