loopback.sh

  1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0
  3
  4# Kselftest framework requirement - SKIP code is 4.
  5ksft_skip=4
  6
  7ALL_TESTS="loopback_test"
  8NUM_NETIFS=2
  9lib_dir=$(dirname "$0")
 10source "$lib_dir"/../../../net/forwarding/tc_common.sh
 11source "$lib_dir"/../../../net/forwarding/lib.sh
 12
 13h1_create()
 14{
 15	simple_if_init $h1 192.0.2.1/24
 16	tc qdisc add dev $h1 clsact
 17}
 18
 19h1_destroy()
 20{
 21	tc qdisc del dev $h1 clsact
 22	simple_if_fini $h1 192.0.2.1/24
 23}
 24
 25h2_create()
 26{
 27	simple_if_init $h2
 28}
 29
 30h2_destroy()
 31{
 32	simple_if_fini $h2
 33}
 34
 35loopback_test()
 36{
 37	RET=0
 38
 39	tc filter add dev $h1 ingress protocol arp pref 1 handle 101 flower \
 40		skip_hw arp_op reply arp_tip 192.0.2.1 action drop
 41
 42	$MZ $h1 -c 1 -t arp -q
 43
 44	tc_check_packets "dev $h1 ingress" 101 1
 45	check_fail $? "Matched on a filter without loopback setup"
 46
 47	ethtool -K $h1 loopback on
 48	check_err $? "Failed to enable loopback"
 49
 50	setup_wait_dev $h1
 51
 52	$MZ $h1 -c 1 -t arp -q
 53
 54	tc_check_packets "dev $h1 ingress" 101 1
 55	check_err $? "Did not match on filter with loopback"
 56
 57	ethtool -K $h1 loopback off
 58	check_err $? "Failed to disable loopback"
 59
 60	$MZ $h1 -c 1 -t arp -q
 61
 62	tc_check_packets "dev $h1 ingress" 101 2
 63	check_fail $? "Matched on a filter after loopback was removed"
 64
 65	tc filter del dev $h1 ingress protocol arp pref 1 handle 101 flower
 66
 67	log_test "loopback"
 68}
 69
 70setup_prepare()
 71{
 72	h1=${NETIFS[p1]}
 73	h2=${NETIFS[p2]}
 74
 75	vrf_prepare
 76
 77	h1_create
 78	h2_create
 79
 80	if ethtool -k $h1 | grep loopback | grep -q fixed; then
 81		log_test "SKIP: dev $h1 does not support loopback feature"
 82		exit $ksft_skip
 83	fi
 84}
 85
 86cleanup()
 87{
 88	pre_cleanup
 89
 90	h2_destroy
 91	h1_destroy
 92
 93	vrf_cleanup
 94}
 95
 96trap cleanup EXIT
 97
 98setup_prepare
 99setup_wait
100
101tests_run
102
103exit $EXIT_STATUS