vxlan: reuse inner packet flow hash for tunnel outer header load balance

[vpp.git] / src / plugins / gtpu / gtpu_encap.c

diff --git a/src/plugins/gtpu/gtpu_encap.c b/src/plugins/gtpu/gtpu_encap.c
index ec33e1e..e6b2ce5 100644 (file)
--- a/src/plugins/gtpu/gtpu_encap.c
+++ b/src/plugins/gtpu/gtpu_encap.c
@@ -413,6 +413,12 @@ gtpu_encap_inline (vlib_main_t * vm,
          stats_n_packets += 4;
          stats_n_bytes += len0 + len1 + len2 + len3;
 
+          /* save inner packet flow_hash for load-balance node */
+          vnet_buffer (b0)->ip.flow_hash = flow_hash0;
+          vnet_buffer (b1)->ip.flow_hash = flow_hash1;
+          vnet_buffer (b2)->ip.flow_hash = flow_hash2;
+          vnet_buffer (b3)->ip.flow_hash = flow_hash3;
+
          /* Batch stats increment on the same gtpu tunnel so counter is not
             incremented per packet. Note stats are still incremented for deleted
             and admin-down tunnel where packets are dropped. It is not worthwhile
@@ -611,6 +617,9 @@ gtpu_encap_inline (vlib_main_t * vm,
          stats_n_packets += 1;
          stats_n_bytes += len0;
 
+          /* save inner packet flow_hash for load-balance node */
+          vnet_buffer (b0)->ip.flow_hash = flow_hash0;
+
          /* Batch stats increment on the same gtpu tunnel so counter is not
             incremented per packet. Note stats are still incremented for deleted
             and admin-down tunnel where packets are dropped. It is not worthwhile