skbuff.h.diff

--- ../clean/linux-4.3/include/linux/skbuff.h   2015-11-01 18:05:25.000000000 -0600
+++ include/linux/skbuff.h      2018-12-24 20:48:03.319062142 -0600
@@ -23,6 +23,7 @@
 #include <linux/rbtree.h>
 #include <linux/socket.h>

+
 #include <linux/atomic.h>
 #include <asm/types.h>
 #include <linux/spinlock.h>
@@ -632,6 +633,8 @@
        __u8                    ipvs_property:1;
        __u8                    inner_protocol_type:1;
        __u8                    remcsum_offload:1;
+       //add by Kun
+       __u8                    phase_num:2;
        /* 3 or 5 bit hole */

 #ifdef CONFIG_NET_SCHED
@@ -956,6 +959,9 @@
        skb->l4_hash = is_l4;
        skb->sw_hash = is_sw;
        skb->hash = hash;
+
+       //add by Kun
+       skb->phase_num = skb->phase_num + 1;
 }

 static inline void
@@ -1023,8 +1029,18 @@

 static inline __u32 skb_get_hash(struct sk_buff *skb)
 {
-       if (!skb->l4_hash && !skb->sw_hash)
+//add by Kun
+//     if (!skb->l4_hash && !skb->sw_hash)
+//             __skb_get_hash(skb);
+
+//allow recalculation in VXLAN and veth phase receiving
+       if (skb->phase_num <= 2) {
                __skb_get_hash(skb);
+       } else {
+               if (!skb->l4_hash && !skb->sw_hash)
+                       __skb_get_hash(skb);
+       }
+//end

        return skb->hash;
 }