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selftests: forwarding: Create test topology for multipath routing
Create a topology with two hosts, each directly connected to a different router. Both routers are connected using two links, enabling multipath routing. Test IPv4 and IPv6 ping using default MTU and large MTU. Signed-off-by: Ido Schimmel <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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‎tools/testing/selftests/net/forwarding/router_multipath.sh‎

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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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NUM_NETIFS=8
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source lib.sh
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h1_create()
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{
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vrf_create "vrf-h1"
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ip link set dev $h1 master vrf-h1
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ip link set dev vrf-h1 up
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ip link set dev $h1 up
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ip address add 192.0.2.2/24 dev $h1
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ip address add 2001:db8:1::2/64 dev $h1
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ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
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ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
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}
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h1_destroy()
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{
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ip route del 2001:db8:2::/64 vrf vrf-h1
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ip route del 198.51.100.0/24 vrf vrf-h1
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ip address del 2001:db8:1::2/64 dev $h1
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ip address del 192.0.2.2/24 dev $h1
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ip link set dev $h1 down
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vrf_destroy "vrf-h1"
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}
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h2_create()
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{
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vrf_create "vrf-h2"
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ip link set dev $h2 master vrf-h2
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ip link set dev vrf-h2 up
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ip link set dev $h2 up
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ip address add 198.51.100.2/24 dev $h2
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ip address add 2001:db8:2::2/64 dev $h2
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ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
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ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
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}
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h2_destroy()
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{
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ip route del 2001:db8:1::/64 vrf vrf-h2
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ip route del 192.0.2.0/24 vrf vrf-h2
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ip address del 2001:db8:2::2/64 dev $h2
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ip address del 198.51.100.2/24 dev $h2
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ip link set dev $h2 down
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vrf_destroy "vrf-h2"
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}
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router1_create()
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{
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vrf_create "vrf-r1"
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ip link set dev $rp11 master vrf-r1
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ip link set dev $rp12 master vrf-r1
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ip link set dev $rp13 master vrf-r1
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ip link set dev vrf-r1 up
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ip link set dev $rp11 up
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ip link set dev $rp12 up
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ip link set dev $rp13 up
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ip address add 192.0.2.1/24 dev $rp11
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ip address add 2001:db8:1::1/64 dev $rp11
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ip address add 169.254.2.12/24 dev $rp12
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ip address add fe80:2::12/64 dev $rp12
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ip address add 169.254.3.13/24 dev $rp13
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ip address add fe80:3::13/64 dev $rp13
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ip route add 198.51.100.0/24 vrf vrf-r1 \
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nexthop via 169.254.2.22 dev $rp12 \
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nexthop via 169.254.3.23 dev $rp13
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ip route add 2001:db8:2::/64 vrf vrf-r1 \
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nexthop via fe80:2::22 dev $rp12 \
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nexthop via fe80:3::23 dev $rp13
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}
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router1_destroy()
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{
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ip route del 2001:db8:2::/64 vrf vrf-r1
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ip route del 198.51.100.0/24 vrf vrf-r1
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ip address del fe80:3::13/64 dev $rp13
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ip address del 169.254.3.13/24 dev $rp13
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ip address del fe80:2::12/64 dev $rp12
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ip address del 169.254.2.12/24 dev $rp12
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ip address del 2001:db8:1::1/64 dev $rp11
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ip address del 192.0.2.1/24 dev $rp11
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ip link set dev $rp13 down
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ip link set dev $rp12 down
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ip link set dev $rp11 down
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vrf_destroy "vrf-r1"
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}
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router2_create()
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{
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vrf_create "vrf-r2"
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ip link set dev $rp21 master vrf-r2
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ip link set dev $rp22 master vrf-r2
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ip link set dev $rp23 master vrf-r2
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ip link set dev vrf-r2 up
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ip link set dev $rp21 up
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ip link set dev $rp22 up
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ip link set dev $rp23 up
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ip address add 198.51.100.1/24 dev $rp21
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ip address add 2001:db8:2::1/64 dev $rp21
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ip address add 169.254.2.22/24 dev $rp22
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ip address add fe80:2::22/64 dev $rp22
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ip address add 169.254.3.23/24 dev $rp23
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ip address add fe80:3::23/64 dev $rp23
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ip route add 192.0.2.0/24 vrf vrf-r2 \
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nexthop via 169.254.2.12 dev $rp22 \
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nexthop via 169.254.3.13 dev $rp23
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ip route add 2001:db8:1::/64 vrf vrf-r2 \
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nexthop via fe80:2::12 dev $rp22 \
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nexthop via fe80:3::13 dev $rp23
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}
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router2_destroy()
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{
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ip route del 2001:db8:1::/64 vrf vrf-r2
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ip route del 192.0.2.0/24 vrf vrf-r2
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ip address del fe80:3::23/64 dev $rp23
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ip address del 169.254.3.23/24 dev $rp23
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ip address del fe80:2::22/64 dev $rp22
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ip address del 169.254.2.22/24 dev $rp22
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ip address del 2001:db8:2::1/64 dev $rp21
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ip address del 198.51.100.1/24 dev $rp21
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ip link set dev $rp23 down
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ip link set dev $rp22 down
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ip link set dev $rp21 down
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vrf_destroy "vrf-r2"
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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rp11=${NETIFS[p2]}
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rp12=${NETIFS[p3]}
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rp22=${NETIFS[p4]}
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rp13=${NETIFS[p5]}
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rp23=${NETIFS[p6]}
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rp21=${NETIFS[p7]}
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h2=${NETIFS[p8]}
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vrf_prepare
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h1_create
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h2_create
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router1_create
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router2_create
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forwarding_enable
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}
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cleanup()
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{
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pre_cleanup
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forwarding_restore
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router2_destroy
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router1_destroy
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h2_destroy
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h1_destroy
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vrf_cleanup
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}
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trap cleanup EXIT
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setup_prepare
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setup_wait
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ping_test $h1 198.51.100.2
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ping6_test $h1 2001:db8:2::2
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exit $EXIT_STATUS

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