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authorShawn Ji <xiaji@tethrnet.com>2019-12-18 10:10:54 +0800
committerShawn Ji <xiaji@tethrnet.com>2019-12-20 18:25:10 +0800
commit623b4f85e6ee4611ae15bb3103fe30725ca977ed (patch)
treec0003115d71d300d554d8ba4ac2fee9029d8e731 /src/vnet/geneve/encap.c
parent4453c09ac38b8c80248d105e378640230124f8a6 (diff)
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 <xiaji@tethrnet.com>
Diffstat (limited to 'src/vnet/geneve/encap.c')
-rw-r--r--src/vnet/geneve/encap.c8
1 files changed, 8 insertions, 0 deletions
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