flow_dissector: support L2 GRE

Add support for L2 GRE tunnels, so that RPS can be more effective. Signed-off-by: Michael Dalton <[email protected]> Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
kyagi · Mar 12, 2013 · e1733de · e1733de
1 parent f4f3efd
commit e1733de
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
@@ -119,6 +119,17 @@ bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow)
 				nhoff += 4;
 			if (hdr->flags & GRE_SEQ)
 				nhoff += 4;
+			if (proto == htons(ETH_P_TEB)) {
+				const struct ethhdr *eth;
+				struct ethhdr _eth;
+
+				eth = skb_header_pointer(skb, nhoff,
+							 sizeof(_eth), &_eth);
+				if (!eth)
+					return false;
+				proto = eth->h_proto;
+				nhoff += sizeof(*eth);
+			}
 			goto again;
 		}
 		break;