l2: fix vxlan src port entropy with mpls payload

l2 tunnels like vxlan, gtpu, geneva use vnet_l2_compute_flow_hash() to
compute flow hash for udp src port entropy. In case of inner mpls tunnels
to the same lsr ethernet src and dst macs are the same, so l2 flow hash
is also the same leading to no src port entropy and the only rss queue
overflow on receiver side.

Fix it for all the possible vnet_l2_compute_flow_hash callers by making
mpls playload hash in additon to ip4/ip6. Visible performance impact is
not expected as it's only one check for mpls ethertype for common cases.

Type: fix
Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru>
Change-Id: I69153d42fb3d7c094a670c674fac8d14039c626a

1 files changed, 12 insertions, 2 deletions

diff --git a/test/template_bd.py b/test/template_bd.py
index 55aaa5a8f4c..07e824af5a8 100644
--- a/test/template_bd.py
+++ b/test/template_bd.py
@@ -5,6 +5,8 @@ import abc
 from scapy.layers.l2 import Ether
 from scapy.packet import Raw
 from scapy.layers.inet import IP, UDP
+from scapy.layers.inet6 import IPv6
+from scapy.contrib.mpls import MPLS
 
 
 class BridgeDomain(metaclass=abc.ABCMeta):
@@ -61,8 +63,16 @@ class BridgeDomain(metaclass=abc.ABCMeta):
         """
         self.assertEqual(pkt1[Ether].src, pkt2[Ether].src)
         self.assertEqual(pkt1[Ether].dst, pkt2[Ether].dst)
-        self.assertEqual(pkt1[IP].src, pkt2[IP].src)
-        self.assertEqual(pkt1[IP].dst, pkt2[IP].dst)
+        if MPLS in pkt1 or MPLS in pkt2:
+            self.assertEqual(pkt1[MPLS].label, pkt2[MPLS].label)
+            self.assertEqual(pkt1[MPLS].cos, pkt2[MPLS].cos)
+            self.assertEqual(pkt1[MPLS].ttl, pkt2[MPLS].ttl)
+        if IP in pkt1 or IP in pkt2:
+            self.assertEqual(pkt1[IP].src, pkt2[IP].src)
+            self.assertEqual(pkt1[IP].dst, pkt2[IP].dst)
+        elif IPv6 in pkt1 or IPv6 in pkt2:
+            self.assertEqual(pkt1[IPv6].src, pkt2[IPv6].src)
+            self.assertEqual(pkt1[IPv6].dst, pkt2[IPv6].dst)
         self.assertEqual(pkt1[UDP].sport, pkt2[UDP].sport)
         self.assertEqual(pkt1[UDP].dport, pkt2[UDP].dport)
         self.assertEqual(pkt1[Raw], pkt2[Raw])