vxlan: allow L4 GRO passthrough
When passing up an UDP GSO packet with L4 aggregation, there is
no need to segment it at the vxlan level. We can propagate the
packet untouched and let it be segmented later, if needed.
Introduce an helper to allow let the UDP socket to accept any
L4 aggregation and use it in the vxlan driver.
v1 -> v2:
- updated to use the newly introduced UDP socket 'accept*' fields
Signed-off-by: Paolo Abeni <[email protected]>
Reviewed-by: Willem de Bruijn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/include/linux/udp.h b/include/linux/udp.h
index ae58ff3..ae66dad 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -145,6 +145,12 @@ static inline bool udp_unexpected_gso(struct sock *sk, struct sk_buff *skb)
return false;
}
+static inline void udp_allow_gso(struct sock *sk)
+{
+ udp_sk(sk)->accept_udp_l4 = 1;
+ udp_sk(sk)->accept_udp_fraglist = 1;
+}
+
#define udp_portaddr_for_each_entry(__sk, list) \
hlist_for_each_entry(__sk, list, __sk_common.skc_portaddr_node)
