rps: Add flag to skb to indicate rxhash is based on L4 tuple

The l4_rxhash flag was added to the skb structure to indicate
that the rxhash value was computed over the 4 tuple for the
packet which includes the port information in the encapsulated
transport packet.  This is used by the stack to preserve the
rxhash value in __skb_rx_tunnel.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 7b996ed86d5..f902c331217 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -414,6 +414,7 @@ struct sk_buff {
         __u8                    ndisc_nodetype:2;
 #endif
         __u8                    ooo_okay:1;
+        __u8                    l4_rxhash:1;
         kmemcheck_bitfield_end(flags2);
 
         /* 0/13 bit hole */
@@ -572,11 +573,11 @@ extern unsigned int   skb_find_text(struct sk_buff *skb, unsigned int from,
                                     unsigned int to, struct ts_config *config,
                                     struct ts_state *state);
 
-extern __u32 __skb_get_rxhash(struct sk_buff *skb);
+extern void __skb_get_rxhash(struct sk_buff *skb);
 static inline __u32 skb_get_rxhash(struct sk_buff *skb)
 {
         if (!skb->rxhash)
-                skb->rxhash = __skb_get_rxhash(skb);
+                __skb_get_rxhash(skb);
 
         return skb->rxhash;
 }