tools/testing/selftests/net/fib_tests.sh

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# This test is for checking IPv4 and IPv6 FIB behavior in response to
# different events.

ret=0

check_err()
{
	if [ $ret -eq 0 ]; then
		ret=$1
	fi
}

check_fail()
{
	if [ $1 -eq 0 ]; then
		ret=1
	fi
}

netns_create()
{
	local testns=$1

	ip netns add $testns
	ip netns exec $testns ip link set dev lo up
}

fib_unreg_unicast_test()
{
	ret=0

	netns_create "testns"

	ip -netns testns link add dummy0 type dummy
	ip -netns testns link set dev dummy0 up

	ip -netns testns address add 198.51.100.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0

	ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null
	check_err $?

	ip -netns testns link del dev dummy0
	check_err $?

	ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null
	check_fail $?

	ip netns del testns

	if [ $ret -ne 0 ]; then
		echo "FAIL: unicast route test"
		return 1
	fi
	echo "PASS: unicast route test"
}

fib_unreg_multipath_test()
{
	ret=0

	netns_create "testns"

	ip -netns testns link add dummy0 type dummy
	ip -netns testns link set dev dummy0 up

	ip -netns testns link add dummy1 type dummy
	ip -netns testns link set dev dummy1 up

	ip -netns testns address add 198.51.100.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0

	ip -netns testns address add 192.0.2.1/24 dev dummy1
	ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy1

	ip -netns testns route add 203.0.113.0/24 \
		nexthop via 198.51.100.2 dev dummy0 \
		nexthop via 192.0.2.2 dev dummy1
	ip -netns testns -6 route add 2001:db8:3::/64 \
		nexthop via 2001:db8:1::2 dev dummy0 \
		nexthop via 2001:db8:2::2 dev dummy1

	ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null
	check_err $?

	ip -netns testns link del dev dummy0
	check_err $?

	ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null
	# In IPv6 we do not flush the entire multipath route.
	check_err $?

	ip -netns testns link del dev dummy1

	ip netns del testns

	if [ $ret -ne 0 ]; then
		echo "FAIL: multipath route test"
		return 1
	fi
	echo "PASS: multipath route test"
}

fib_unreg_test()
{
	echo "Running netdev unregister tests"

	fib_unreg_unicast_test
	fib_unreg_multipath_test
}

fib_down_unicast_test()
{
	ret=0

	netns_create "testns"

	ip -netns testns link add dummy0 type dummy
	ip -netns testns link set dev dummy0 up

	ip -netns testns address add 198.51.100.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0

	ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null
	check_err $?

	ip -netns testns link set dev dummy0 down
	check_err $?

	ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null
	check_fail $?

	ip -netns testns link del dev dummy0

	ip netns del testns

	if [ $ret -ne 0 ]; then
		echo "FAIL: unicast route test"
		return 1
	fi
	echo "PASS: unicast route test"
}

fib_down_multipath_test_do()
{
	local down_dev=$1
	local up_dev=$2

	ip -netns testns route get fibmatch 203.0.113.1 \
		oif $down_dev &> /dev/null
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 \
		oif $down_dev &> /dev/null
	check_fail $?

	ip -netns testns route get fibmatch 203.0.113.1 \
		oif $up_dev &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 \
		oif $up_dev &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 203.0.113.1 | \
		grep $down_dev | grep -q "dead linkdown"
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 | \
		grep $down_dev | grep -q "dead linkdown"
	check_err $?

	ip -netns testns route get fibmatch 203.0.113.1 | \
		grep $up_dev | grep -q "dead linkdown"
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 | \
		grep $up_dev | grep -q "dead linkdown"
	check_fail $?
}

fib_down_multipath_test()
{
	ret=0

	netns_create "testns"

	ip -netns testns link add dummy0 type dummy
	ip -netns testns link set dev dummy0 up

	ip -netns testns link add dummy1 type dummy
	ip -netns testns link set dev dummy1 up

	ip -netns testns address add 198.51.100.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0

	ip -netns testns address add 192.0.2.1/24 dev dummy1
	ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy1

	ip -netns testns route add 203.0.113.0/24 \
		nexthop via 198.51.100.2 dev dummy0 \
		nexthop via 192.0.2.2 dev dummy1
	ip -netns testns -6 route add 2001:db8:3::/64 \
		nexthop via 2001:db8:1::2 dev dummy0 \
		nexthop via 2001:db8:2::2 dev dummy1

	ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null
	check_err $?

	ip -netns testns link set dev dummy0 down
	check_err $?

	fib_down_multipath_test_do "dummy0" "dummy1"

	ip -netns testns link set dev dummy0 up
	check_err $?
	ip -netns testns link set dev dummy1 down
	check_err $?

	fib_down_multipath_test_do "dummy1" "dummy0"

	ip -netns testns link set dev dummy0 down
	check_err $?

	ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null
	check_fail $?

	ip -netns testns link del dev dummy1
	ip -netns testns link del dev dummy0

	ip netns del testns

	if [ $ret -ne 0 ]; then
		echo "FAIL: multipath route test"
		return 1
	fi
	echo "PASS: multipath route test"
}

fib_down_test()
{
	echo "Running netdev down tests"

	fib_down_unicast_test
	fib_down_multipath_test
}

fib_carrier_local_test()
{
	ret=0

	# Local routes should not be affected when carrier changes.
	netns_create "testns"

	ip -netns testns link add dummy0 type dummy
	ip -netns testns link set dev dummy0 up

	ip -netns testns link set dev dummy0 carrier on

	ip -netns testns address add 198.51.100.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0

	ip -netns testns route get fibmatch 198.51.100.1 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::1 &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 198.51.100.1 | \
		grep -q "linkdown"
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::1 | \
		grep -q "linkdown"
	check_fail $?

	ip -netns testns link set dev dummy0 carrier off

	ip -netns testns route get fibmatch 198.51.100.1 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::1 &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 198.51.100.1 | \
		grep -q "linkdown"
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::1 | \
		grep -q "linkdown"
	check_fail $?

	ip -netns testns address add 192.0.2.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy0

	ip -netns testns route get fibmatch 192.0.2.1 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:2::1 &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 192.0.2.1 | \
		grep -q "linkdown"
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:2::1 | \
		grep -q "linkdown"
	check_fail $?

	ip -netns testns link del dev dummy0

	ip netns del testns

	if [ $ret -ne 0 ]; then
		echo "FAIL: local route carrier test"
		return 1
	fi
	echo "PASS: local route carrier test"
}

fib_carrier_unicast_test()
{
	ret=0

	netns_create "testns"

	ip -netns testns link add dummy0 type dummy
	ip -netns testns link set dev dummy0 up

	ip -netns testns link set dev dummy0 carrier on

	ip -netns testns address add 198.51.100.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0

	ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 198.51.100.2 | \
		grep -q "linkdown"
	check_fail $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 | \
		grep -q "linkdown"
	check_fail $?

	ip -netns testns link set dev dummy0 carrier off

	ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 198.51.100.2 | \
		grep -q "linkdown"
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:1::2 | \
		grep -q "linkdown"
	check_err $?

	ip -netns testns address add 192.0.2.1/24 dev dummy0
	ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy0

	ip -netns testns route get fibmatch 192.0.2.2 &> /dev/null
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:2::2 &> /dev/null
	check_err $?

	ip -netns testns route get fibmatch 192.0.2.2 | \
		grep -q "linkdown"
	check_err $?
	ip -netns testns -6 route get fibmatch 2001:db8:2::2 | \
		grep -q "linkdown"
	check_err $?

	ip -netns testns link del dev dummy0

	ip netns del testns

	if [ $ret -ne 0 ]; then
		echo "FAIL: unicast route carrier test"
		return 1
	fi
	echo "PASS: unicast route carrier test"
}

fib_carrier_test()
{
	echo "Running netdev carrier change tests"

	fib_carrier_local_test
	fib_carrier_unicast_test
}

fib_test()
{
	fib_unreg_test
	fib_down_test
	fib_carrier_test
}

if [ "$(id -u)" -ne 0 ];then
	echo "SKIP: Need root privileges"
	exit 0
fi

if [ ! -x "$(command -v ip)" ]; then
	echo "SKIP: Could not run test without ip tool"
	exit 0
fi

ip route help 2>&1 | grep -q fibmatch
if [ $? -ne 0 ]; then
	echo "SKIP: iproute2 too old, missing fibmatch"
	exit 0
fi

fib_test

exit $ret