selftests: mlxsw: Add router test

This test aims for both stand alone and internal usage by the resource
infra. The test receives the number routes to offload and checks:
- The routes were offloaded correctly
- Traffic for each route.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/router_scale.sh b/tools/testing/selftests/drivers/net/mlxsw/router_scale.sh
new file mode 100644 (file)
index 0000000..d231649
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/router_scale.sh
@@ -0,0 +1,167 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+ROUTER_NUM_NETIFS=4
+
+router_h1_create()
+{
+       simple_if_init $h1 192.0.1.1/24
+       ip route add 193.0.0.0/8 via 192.0.1.2 dev $h1
+}
+
+router_h1_destroy()
+{
+       ip route del 193.0.0.0/8 via 192.0.1.2 dev $h1
+       simple_if_fini $h1 192.0.1.1/24
+}
+
+router_h2_create()
+{
+       simple_if_init $h2 192.0.2.1/24
+       tc qdisc add dev $h2 handle ffff: ingress
+}
+
+router_h2_destroy()
+{
+       tc qdisc del dev $h2 handle ffff: ingress
+       simple_if_fini $h2 192.0.2.1/24
+}
+
+router_create()
+{
+       ip link set dev $rp1 up
+       ip link set dev $rp2 up
+
+       ip address add 192.0.1.2/24 dev $rp1
+       ip address add 192.0.2.2/24 dev $rp2
+}
+
+router_destroy()
+{
+       ip address del 192.0.2.2/24 dev $rp2
+       ip address del 192.0.1.2/24 dev $rp1
+
+       ip link set dev $rp2 down
+       ip link set dev $rp1 down
+}
+
+router_setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       rp1=${NETIFS[p2]}
+
+       rp2=${NETIFS[p3]}
+       h2=${NETIFS[p4]}
+
+       h1mac=$(mac_get $h1)
+       rp1mac=$(mac_get $rp1)
+
+       vrf_prepare
+
+       router_h1_create
+       router_h2_create
+
+       router_create
+}
+
+router_offload_validate()
+{
+       local route_count=$1
+       local offloaded_count
+
+       offloaded_count=$(ip route | grep -o 'offload' | wc -l)
+       [[ $offloaded_count -ge $route_count ]]
+}
+
+router_routes_create()
+{
+       local route_count=$1
+       local count=0
+
+       ROUTE_FILE="$(mktemp)"
+
+       for i in {0..255}
+       do
+               for j in {0..255}
+               do
+                       for k in {0..255}
+                       do
+                               if [[ $count -eq $route_count ]]; then
+                                       break 3
+                               fi
+
+                               echo route add 193.${i}.${j}.${k}/32 via \
+                                      192.0.2.1 dev $rp2  >> $ROUTE_FILE
+                               ((count++))
+                       done
+               done
+       done
+
+       ip -b $ROUTE_FILE &> /dev/null
+}
+
+router_routes_destroy()
+{
+       if [[ -v ROUTE_FILE ]]; then
+               rm -f $ROUTE_FILE
+       fi
+}
+
+router_test()
+{
+       local route_count=$1
+       local should_fail=$2
+       local count=0
+
+       RET=0
+
+       router_routes_create $route_count
+
+       router_offload_validate $route_count
+       check_err_fail $should_fail $? "Offload of $route_count routes"
+       if [[ $RET -ne 0 ]] || [[ $should_fail -eq 1 ]]; then
+               return
+       fi
+
+       tc filter add dev $h2 ingress protocol ip pref 1 flower \
+               skip_sw dst_ip 193.0.0.0/8 action drop
+
+       for i in {0..255}
+       do
+               for j in {0..255}
+               do
+                       for k in {0..255}
+                       do
+                               if [[ $count -eq $route_count ]]; then
+                                       break 3
+                               fi
+
+                               $MZ $h1 -c 1 -p 64 -a $h1mac -b $rp1mac \
+                                       -A 192.0.1.1 -B 193.${i}.${j}.${k} \
+                                       -t ip -q
+                               ((count++))
+                       done
+               done
+       done
+
+       tc_check_packets "dev $h2 ingress" 1 $route_count
+       check_err $? "Offload mismatch"
+
+       tc filter del dev $h2 ingress protocol ip pref 1 flower \
+               skip_sw dst_ip 193.0.0.0/8 action drop
+
+       router_routes_destroy
+}
+
+router_cleanup()
+{
+       pre_cleanup
+
+       router_routes_destroy
+       router_destroy
+
+       router_h2_destroy
+       router_h1_destroy
+
+       vrf_cleanup
+}