datapath: add ipv6 'set' action

[openvswitch] / datapath / checksum.h

diff --git a/datapath/checksum.h b/datapath/checksum.h
index 2f2ffeeb2e66ebaf7b30ebec0dee385bf3bb425c..a440c59985ca94a17c5dac620248b345767a5404 100644 (file)
--- a/datapath/checksum.h
+++ b/datapath/checksum.h
@@ -102,6 +102,30 @@ static inline void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
 }
 #endif
 
+#if defined(NEED_CSUM_NORMALIZE) || LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0)
+#define inet_proto_csum_replace16 rpl_inet_proto_csum_replace16
+static inline void inet_proto_csum_replace16(__sum16 *sum,
+                                            struct sk_buff *skb,
+                                            const __be32 *from,
+                                            const __be32 *to,
+                                            int pseudohdr)
+{
+       __be32 diff[] = {
+               ~from[0], ~from[1], ~from[2], ~from[3],
+               to[0], to[1], to[2], to[3],
+       };
+       if (get_ip_summed(skb) != OVS_CSUM_PARTIAL) {
+               *sum = csum_fold(csum_partial(diff, sizeof(diff),
+                                ~csum_unfold(*sum)));
+               if (get_ip_summed(skb) == OVS_CSUM_COMPLETE && pseudohdr)
+                       skb->csum = ~csum_partial(diff, sizeof(diff),
+                                                 ~skb->csum);
+       } else if (pseudohdr)
+               *sum = ~csum_fold(csum_partial(diff, sizeof(diff),
+                                 csum_unfold(*sum)));
+}
+#endif
+
 #ifdef NEED_CSUM_NORMALIZE
 static inline void update_csum_start(struct sk_buff *skb, int delta)
 {