rps: Infrastructure in __skb_get_rxhash for deep inspection

Basics for looking for ports in encapsulated packets in tunnels.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index e485cb37228f..4bee9a9aeef6 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -133,6 +133,7 @@
 #include <linux/pci.h>
 #include <linux/inetdevice.h>
 #include <linux/cpu_rmap.h>
+#include <linux/if_tunnel.h>
 
 #include "net-sysfs.h"
 
@@ -2539,6 +2540,7 @@ void __skb_get_rxhash(struct sk_buff *skb)
         nhoff = skb_network_offset(skb);
         proto = skb->protocol;
 
+again:
         switch (proto) {
         case __constant_htons(ETH_P_IP):
                 if (!pskb_may_pull(skb, sizeof(*ip) + nhoff))
@@ -2567,6 +2569,11 @@ void __skb_get_rxhash(struct sk_buff *skb)
                 goto done;
         }
 
+        switch (ip_proto) {
+        default:
+                break;
+        }
+
         ports.v32 = 0;
         poff = proto_ports_offset(ip_proto);
         if (poff >= 0) {