#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 ALL_TESTS="loopback_test" NUM_NETIFS=2 lib_dir=$(dirname "$0") source "$lib_dir"/../../../net/forwarding/tc_common.sh source "$lib_dir"/../../../net/forwarding/lib.sh h1_create() { simple_if_init $h1 192.0.2.1/24 tc qdisc add dev $h1 clsact } h1_destroy() { tc qdisc del dev $h1 clsact simple_if_fini $h1 192.0.2.1/24 } h2_create() { simple_if_init $h2 } h2_destroy() { simple_if_fini $h2 } loopback_test() { RET=0 tc filter add dev $h1 ingress protocol arp pref 1 handle 101 flower \ skip_hw arp_op reply arp_tip 192.0.2.1 action drop $MZ $h1 -c 1 -t arp -q tc_check_packets "dev $h1 ingress" 101 1 check_fail $? "Matched on a filter without loopback setup" ethtool -K $h1 loopback on check_err $? "Failed to enable loopback" setup_wait_dev $h1 $MZ $h1 -c 1 -t arp -q tc_check_packets "dev $h1 ingress" 101 1 check_err $? "Did not match on filter with loopback" ethtool -K $h1 loopback off check_err $? "Failed to disable loopback" $MZ $h1 -c 1 -t arp -q tc_check_packets "dev $h1 ingress" 101 2 check_fail $? "Matched on a filter after loopback was removed" tc filter del dev $h1 ingress protocol arp pref 1 handle 101 flower log_test "loopback" } setup_prepare() { h1=${NETIFS[p1]} h2=${NETIFS[p2]} vrf_prepare h1_create h2_create if ethtool -k $h1 | grep loopback | grep -q fixed; then log_test "SKIP: dev $h1 does not support loopback feature" exit $ksft_skip fi } cleanup() { pre_cleanup h2_destroy h1_destroy vrf_cleanup } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS