From 623b4f85e6ee4611ae15bb3103fe30725ca977ed Mon Sep 17 00:00:00 2001 From: Shawn Ji Date: Wed, 18 Dec 2019 10:10:54 +0800 Subject: vxlan: reuse inner packet flow hash for tunnel outer header load balance Type: fix Several tunnels encapsulation use udp as outer header and udp src port is set by inner header flow hash, such as gtpu, geneve, vxlan, vxlan-gbd Since flow hash of inner header is already been calculated, keeping it to vnet_buffere[b]->ip.flow_hash should save load-balance node work to select ECMP uplinks. Change-Id: I0e4e2b27178f4fcc5785e221d6d1f3e8747d0d59 Signed-off-by: Shawn Ji --- src/vnet/geneve/encap.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'src/vnet/geneve') diff --git a/src/vnet/geneve/encap.c b/src/vnet/geneve/encap.c index 8e59aea3626..af52fd24543 100644 --- a/src/vnet/geneve/encap.c +++ b/src/vnet/geneve/encap.c @@ -120,6 +120,7 @@ geneve_encap_inline (vlib_main_t * vm, flow_hash0 = vnet_l2_compute_flow_hash (b[0]); flow_hash1 = vnet_l2_compute_flow_hash (b[1]); + /* Get next node index and adj index from tunnel next_dpo */ if (sw_if_index0 != vnet_buffer (b[0])->sw_if_index[VLIB_TX]) { @@ -289,6 +290,10 @@ geneve_encap_inline (vlib_main_t * vm, stats_n_packets += 2; stats_n_bytes += len0 + len1; + /* save inner packet flow_hash for load-balance node */ + vnet_buffer (b[0])->ip.flow_hash = flow_hash0; + vnet_buffer (b[1])->ip.flow_hash = flow_hash1; + /* Batch stats increment on the same geneve 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 @@ -467,6 +472,9 @@ geneve_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 (b[0])->ip.flow_hash = flow_hash0; + /* Batch stats increment on the same geneve 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 -- cgit 1.2.3-korg