selftests: mlxsw: spectrum: q_in_vni_veto: Disable IPv6 autogen on a bridge

In a future patch, mlxsw will start adding RIFs to uppers of front panel
port netdevices, if they have an IP address.

At the time that the front panel port is enslaved to the bridge, the bridge
MAC address does not have the same prefix as other interfaces in the
system. On Nvidia Spectrum-1 machines all the RIFs have to have the same
38-bit MAC address prefix. Since the bridge does not obey this limitation,
the RIF cannot be created, and the enslavement attempt is vetoed on the
grounds of the configuration not being offloadable.

The selftest itself however checks vetoing of a different aspect of the
configuration and the bridge does not need to participate in routing
traffic. The IP address or the RIF are irrelevant.

Fix by disabling automatic IPv6 address generation for the HW-offloaded
bridge in this selftest, thus exempting it from mlxsw router attention.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/spectrum/q_in_vni_veto.sh b/tools/testing/selftests/drivers/net/mlxsw/spectrum/q_in_vni_veto.sh
index f0443b1b05b9d060d2946a5dd26f779b6111a6cd..60753d46a2d4f3612638b522a084e72fee474238 100755 (executable)
--- a/tools/testing/selftests/drivers/net/mlxsw/spectrum/q_in_vni_veto.sh
+++ b/tools/testing/selftests/drivers/net/mlxsw/spectrum/q_in_vni_veto.sh
@@ -34,6 +34,7 @@ create_vxlan_on_top_of_8021ad_bridge()
 
        ip link add dev br0 type bridge vlan_filtering 1 vlan_protocol 802.1ad \
                vlan_default_pvid 0 mcast_snooping 0
+       ip link set dev br0 addrgenmode none
        ip link set dev br0 up
 
        ip link add name vx100 type vxlan id 1000 local 192.0.2.17 dstport \