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selftests: forwarding: mirror_gre_vlan_bridge_1q: Fix roaming test 

ARP or ND traffic can cause spurious migration of FDB back to $swp3.
Mirroring is then updated in accordance with the change, and mirrored
packets are seen at h3, causing a failure.

Detect the case of this spurious roaming, and retry the test.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2019-01-31 22:35:21 +00:00 committed by David S. Miller
parent 35036b0b09
commit ccdb66dd2f
1 changed files with 18 additions and 5 deletions
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23
tools/testing/selftests/net/forwarding/mirror_gre_vlan_bridge_1q.sh
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@ -269,12 +269,25 @@ test_span_gre_fdb_roaming()
mirror_install $swp1 ingress $tundev "matchall $tcflags"
quick_test_span_gre_dir $tundev ingress
bridge fdb del dev $swp3 $h3mac vlan 555 master
bridge fdb add dev $swp2 $h3mac vlan 555 master
sleep 1
fail_test_span_gre_dir $tundev ingress
while ((RET == 0)); do
bridge fdb del dev $swp3 $h3mac vlan 555 master 2>/dev/null
bridge fdb add dev $swp2 $h3mac vlan 555 master
sleep 1
fail_test_span_gre_dir $tundev ingress
bridge fdb del dev $swp2 $h3mac vlan 555 master
if ! bridge fdb sh dev $swp2 vlan 555 master \
| grep -q $h3mac; then
printf "TEST: %-60s [RETRY]\n" \
"$what: MAC roaming ($tcflags)"
# ARP or ND probably reprimed the FDB while the test
# was running. We would get a spurious failure.
RET=0
continue
fi
break
done
bridge fdb del dev $swp2 $h3mac vlan 555 master 2>/dev/null
# Re-prime FDB
$ARPING -I br1.555 192.0.2.130 -fqc 1
sleep 1