selftests: mlxsw: Test port range registers' occupancy

Test that filters that match on the same port range, but with different
combination of IPv4/IPv6 and TCP/UDP all use the same port range
register by observing port range registers' occupancy via
devlink-resource.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/0a2eb63b234fb062ff011e80231868cc80000c81.1689092769.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/drivers/net/mlxsw/port_range_occ.sh b/tools/testing/selftests/drivers/net/mlxsw/port_range_occ.sh
new file mode 100755 (executable)
index 0000000..b1f0781
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/mlxsw/port_range_occ.sh
@@ -0,0 +1,111 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test that filters that match on the same port range, but with different
+# combination of IPv4/IPv6 and TCP/UDP all use the same port range register by
+# observing port range registers' occupancy via devlink-resource.
+
+lib_dir=$(dirname $0)/../../../net/forwarding
+
+ALL_TESTS="
+       port_range_occ_test
+"
+NUM_NETIFS=2
+source $lib_dir/lib.sh
+source $lib_dir/devlink_lib.sh
+
+h1_create()
+{
+       simple_if_init $h1
+}
+
+h1_destroy()
+{
+       simple_if_fini $h1
+}
+
+switch_create()
+{
+       simple_if_init $swp1
+       tc qdisc add dev $swp1 clsact
+}
+
+switch_destroy()
+{
+       tc qdisc del dev $swp1 clsact
+       simple_if_fini $swp1
+}
+
+setup_prepare()
+{
+       h1=${NETIFS[p1]}
+       swp1=${NETIFS[p2]}
+
+       vrf_prepare
+
+       h1_create
+       switch_create
+}
+
+cleanup()
+{
+       pre_cleanup
+
+       switch_destroy
+       h1_destroy
+
+       vrf_cleanup
+}
+
+port_range_occ_get()
+{
+       devlink_resource_occ_get port_range_registers
+}
+
+port_range_occ_test()
+{
+       RET=0
+
+       local occ=$(port_range_occ_get)
+
+       # Two port range registers are used, for source and destination port
+       # ranges.
+       tc filter add dev $swp1 ingress pref 1 handle 101 proto ip \
+               flower skip_sw ip_proto udp src_port 1-100 dst_port 1-100 \
+               action pass
+       (( occ + 2 == $(port_range_occ_get) ))
+       check_err $? "Got occupancy $(port_range_occ_get), expected $((occ + 2))"
+
+       tc filter add dev $swp1 ingress pref 1 handle 102 proto ip \
+               flower skip_sw ip_proto tcp src_port 1-100 dst_port 1-100 \
+               action pass
+       tc filter add dev $swp1 ingress pref 2 handle 103 proto ipv6 \
+               flower skip_sw ip_proto udp src_port 1-100 dst_port 1-100 \
+               action pass
+       tc filter add dev $swp1 ingress pref 2 handle 104 proto ipv6 \
+               flower skip_sw ip_proto tcp src_port 1-100 dst_port 1-100 \
+               action pass
+       (( occ + 2 == $(port_range_occ_get) ))
+       check_err $? "Got occupancy $(port_range_occ_get), expected $((occ + 2))"
+
+       tc filter del dev $swp1 ingress pref 2 handle 104 flower
+       tc filter del dev $swp1 ingress pref 2 handle 103 flower
+       tc filter del dev $swp1 ingress pref 1 handle 102 flower
+       (( occ + 2 == $(port_range_occ_get) ))
+       check_err $? "Got occupancy $(port_range_occ_get), expected $((occ + 2))"
+
+       tc filter del dev $swp1 ingress pref 1 handle 101 flower
+       (( occ == $(port_range_occ_get) ))
+       check_err $? "Got occupancy $(port_range_occ_get), expected $occ"
+
+       log_test "port range occupancy"
+}
+
+trap cleanup EXIT
+
+setup_prepare
+setup_wait
+
+tests_run
+
+exit $EXIT_STATUS