[ovs-dev] [PATCH 5/5] tests: Avoid endianness sensitivity in MPLS handling test.

[Ben Pfaff]

The test "ofproto-dpif - MPLS handling" included a test of the "multipath"
action whose results depended on the hash function in use.  The OVS hash
function yields different results on little-endian and big-endian systems,
so this caused a failure.

This commit fixes the problem by changing the modulus in the multipath
action from 256 to 1; any (nonnegative) value modulo 1 is 0, so this makes
the results consistent across endianness (and across hash function
changes).  I think that this is still a good enough test.

Signed-off-by: Ben Pfaff <blp at ovn.org>
---
 tests/ofproto-dpif.at | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tests/ofproto-dpif.at b/tests/ofproto-dpif.at
index f1a8ac5..b003488 100644
--- a/tests/ofproto-dpif.at
+++ b/tests/ofproto-dpif.at
@@ -1575,7 +1575,7 @@ cookie=0xd dl_src=60:66:66:66:00:01 actions=pop_mpls:0x0800,dec_ttl,controller
 cookie=0xd dl_src=60:66:66:66:00:02 actions=pop_mpls:0x0800,load:0xa000001->OXM_OF_IPV4_DST[[]],controller
 cookie=0xd dl_src=60:66:66:66:00:03 actions=pop_mpls:0x0800,move:OXM_OF_IPV4_DST[[]]->OXM_OF_IPV4_SRC[[]],controller
 cookie=0xd dl_src=60:66:66:66:00:04 actions=pop_mpls:0x0800,push:OXM_OF_IPV4_DST[[]],pop:OXM_OF_IPV4_SRC[[]],controller
-cookie=0xd dl_src=60:66:66:66:00:05 actions=pop_mpls:0x0800,multipath(eth_src,50,modulo_n,256,0,OXM_OF_IPV4_SRC[[0..7]]),controller
+cookie=0xd dl_src=60:66:66:66:00:05 actions=pop_mpls:0x0800,multipath(eth_src,50,modulo_n,1,0,OXM_OF_IPV4_SRC[[0..7]]),controller
 cookie=0xd dl_src=60:66:66:66:00:06 actions=pop_mpls:0x0800,bundle_load(eth_src,50,hrw,ofport,OXM_OF_IPV4_SRC[[0..15]],slaves:1,2),controller
 cookie=0xd dl_src=60:66:66:66:00:07 actions=pop_mpls:0x0800,learn(table=1,hard_timeout=60,eth_type=0x800,nw_proto=6,OXM_OF_IPV4_SRC[[]]=OXM_OF_IPV4_DST[[]]),controller
 
@@ -1984,13 +1984,13 @@ OVS_APP_EXIT_AND_WAIT(ovs-ofctl)
 
 AT_CHECK([strip_metadata < ofctl_monitor.log], [0], [dnl
 NXT_PACKET_IN (xid=0x0): cookie=0xd total_len=58 in_port=1 (via action) data_len=58 (unbuffered)
-tcp,vlan_tci=0x0000,dl_src=60:66:66:66:00:05,dl_dst=50:54:00:00:00:07,nw_src=192.168.0.106,nw_dst=192.168.0.2,nw_tos=0,nw_ecn=0,nw_ttl=255,tp_src=80,tp_dst=0,tcp_flags=0 tcp_csum:76db
+tcp,vlan_tci=0x0000,dl_src=60:66:66:66:00:05,dl_dst=50:54:00:00:00:07,nw_src=192.168.0.0,nw_dst=192.168.0.2,nw_tos=0,nw_ecn=0,nw_ttl=255,tp_src=80,tp_dst=0,tcp_flags=0 tcp_csum:7745
 dnl
 NXT_PACKET_IN (xid=0x0): cookie=0xd total_len=58 in_port=1 (via action) data_len=58 (unbuffered)
-tcp,vlan_tci=0x0000,dl_src=60:66:66:66:00:05,dl_dst=50:54:00:00:00:07,nw_src=192.168.0.106,nw_dst=192.168.0.2,nw_tos=0,nw_ecn=0,nw_ttl=255,tp_src=80,tp_dst=0,tcp_flags=0 tcp_csum:76db
+tcp,vlan_tci=0x0000,dl_src=60:66:66:66:00:05,dl_dst=50:54:00:00:00:07,nw_src=192.168.0.0,nw_dst=192.168.0.2,nw_tos=0,nw_ecn=0,nw_ttl=255,tp_src=80,tp_dst=0,tcp_flags=0 tcp_csum:7745
 dnl
 NXT_PACKET_IN (xid=0x0): cookie=0xd total_len=58 in_port=1 (via action) data_len=58 (unbuffered)
-tcp,vlan_tci=0x0000,dl_src=60:66:66:66:00:05,dl_dst=50:54:00:00:00:07,nw_src=192.168.0.106,nw_dst=192.168.0.2,nw_tos=0,nw_ecn=0,nw_ttl=255,tp_src=80,tp_dst=0,tcp_flags=0 tcp_csum:76db
+tcp,vlan_tci=0x0000,dl_src=60:66:66:66:00:05,dl_dst=50:54:00:00:00:07,nw_src=192.168.0.0,nw_dst=192.168.0.2,nw_tos=0,nw_ecn=0,nw_ttl=255,tp_src=80,tp_dst=0,tcp_flags=0 tcp_csum:7745
 ])
 
 AT_CHECK([ovs-appctl time/warp 5000], [0], [ignore])
@@ -2573,7 +2573,7 @@ AT_CHECK([ovs-ofctl dump-flows br0 | ofctl_strip | sort], [0], [dnl
  cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:02 actions=pop_mpls:0x0800,load:0xa000001->NXM_OF_IP_DST[[]],CONTROLLER:65535
  cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:03 actions=pop_mpls:0x0800,move:NXM_OF_IP_DST[[]]->NXM_OF_IP_SRC[[]],CONTROLLER:65535
  cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:04 actions=pop_mpls:0x0800,push:NXM_OF_IP_DST[[]],pop:NXM_OF_IP_SRC[[]],CONTROLLER:65535
- cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:05 actions=pop_mpls:0x0800,multipath(eth_src,50,modulo_n,256,0,NXM_OF_IP_SRC[[0..7]]),CONTROLLER:65535
+ cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:05 actions=pop_mpls:0x0800,multipath(eth_src,50,modulo_n,1,0,NXM_OF_IP_SRC[[0..7]]),CONTROLLER:65535
  cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:06 actions=pop_mpls:0x0800,bundle_load(eth_src,50,hrw,ofport,NXM_OF_IP_SRC[[0..15]],slaves:1,2),CONTROLLER:65535
  cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:07 actions=pop_mpls:0x0800,learn(table=1,hard_timeout=60,eth_type=0x800,nw_proto=6,NXM_OF_IP_SRC[[]]=NXM_OF_IP_DST[[]]),CONTROLLER:65535
  cookie=0xd, n_packets=3, n_bytes=186, dl_src=60:66:66:66:00:09 actions=resubmit(,2),CONTROLLER:65535
-- 
2.1.3