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selftests: forwarding: Fix test for different devices

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When running the test on the Spectrum ASIC the generated packets are
counted on the ingress filter and injected back to the pipeline because
of the 'pass' action. The router block then drops the packets due to
checksum error, as the test generates packets with zero checksum.

When running the test on an emulator that is not as strict about
checksum errors the test fails since packets are counted twice. Once by
the emulated ASIC on its ingress filter and again by the kernel as the
emulator does not perform checksum validation and allows the packets to
be trapped by a matching host route.

Fix this by changing the action to 'drop', which will prevent the packet
from continuing further in the pipeline to the router block.

For veth pairs this change is essentially a NOP given packets are only
processed once (by the kernel).

Fixes: a0b61f3d8ebf ("selftests: forwarding: vxlan_bridge_1d: Add an ECN decap test")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2019-01-08 16:48:12 +00:00 committed by David S. Miller
parent 279737939a
commit 289fb44df4
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/net/forwarding/vxlan_bridge_1d.sh
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@ -629,7 +629,7 @@ __test_ecn_decap()
RET=0
tc filter add dev $h1 ingress pref 77 prot ip \
flower ip_tos $decapped_tos action pass
flower ip_tos $decapped_tos action drop
sleep 1
vxlan_encapped_ping_test v2 v1 192.0.2.17 \
$orig_inner_tos $orig_outer_tos \