#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Test traffic distribution when there are multiple routes between an IPv4
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# GRE tunnel. The tunnel carries IPv6 traffic between multiple hosts.
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# Multiple routes are in the underlay network. With the default multipath
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# policy, SW2 will only look at the outer IP addresses, hence only a single
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# route would be used.
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#
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# +-------------------------+
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# | H1 |
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# | $h1 + |
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# | 2001:db8:1::2/64 | |
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# +-------------------|-----+
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# |
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# +-------------------|------------------------+
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# | SW1 | |
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# | $ol1 + |
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# | 2001:db8:1::1/64 |
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# | |
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# | + g1 (gre) |
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# | loc=192.0.2.65 |
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# | rem=192.0.2.66 --. |
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# | tos=inherit | |
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# | v |
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# | + $ul1 |
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# | | 192.0.2.129/28 |
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# +---------------------|----------------------+
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# |
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# +---------------------|----------------------+
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# | SW2 | |
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# | $ul21 + |
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# | 192.0.2.130/28 |
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# | | |
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# ! ________________|_____ |
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# | / \ |
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# | | | |
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# | + $ul22.111 (vlan) + $ul22.222 (vlan) |
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# | | 192.0.2.145/28 | 192.0.2.161/28 |
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# | | | |
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# +--|----------------------|------------------+
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# | |
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# +--|----------------------|------------------+
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# | | | |
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# | + $ul32.111 (vlan) + $ul32.222 (vlan) |
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# | | 192.0.2.146/28 | 192.0.2.162/28 |
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# | | | |
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# | \______________________/ |
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# | | |
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# | | |
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# | $ul31 + |
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# | 192.0.2.177/28 | SW3 |
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# +---------------------|----------------------+
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# |
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# +---------------------|----------------------+
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# | + $ul4 |
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# | ^ 192.0.2.178/28 |
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# | | |
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# | + g2 (gre) | |
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# | loc=192.0.2.66 | |
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# | rem=192.0.2.65 --' |
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# | tos=inherit |
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# | |
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# | $ol4 + |
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# | 2001:db8:2::1/64 | SW4 |
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# +--------------------|-----------------------+
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# |
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# +--------------------|---------+
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# | | |
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# | $h2 + |
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# | 2001:db8:2::2/64 H2 |
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# +------------------------------+
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ALL_TESTS="
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ping_ipv6
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multipath_ipv6
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"
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NUM_NETIFS=10
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source lib.sh
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h1_create()
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{
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simple_if_init $h1 2001:db8:1::2/64
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ip -6 route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::1
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}
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h1_destroy()
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{
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ip -6 route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::1
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simple_if_fini $h1 2001:db8:1::2/64
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}
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sw1_create()
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{
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simple_if_init $ol1 2001:db8:1::1/64
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__simple_if_init $ul1 v$ol1 192.0.2.129/28
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tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
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__simple_if_init g1 v$ol1 192.0.2.65/32
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ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
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ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1
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}
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sw1_destroy()
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{
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ip -6 route del vrf v$ol1 2001:db8:2::/64
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ip route del vrf v$ol1 192.0.2.66/32
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__simple_if_fini g1 192.0.2.65/32
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tunnel_destroy g1
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__simple_if_fini $ul1 192.0.2.129/28
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simple_if_fini $ol1 2001:db8:1::1/64
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}
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sw2_create()
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{
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simple_if_init $ul21 192.0.2.130/28
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__simple_if_init $ul22 v$ul21
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vlan_create $ul22 111 v$ul21 192.0.2.145/28
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vlan_create $ul22 222 v$ul21 192.0.2.161/28
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ip route add vrf v$ul21 192.0.2.65/32 via 192.0.2.129
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ip route add vrf v$ul21 192.0.2.66/32 \
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nexthop via 192.0.2.146 \
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nexthop via 192.0.2.162
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}
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sw2_destroy()
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{
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ip route del vrf v$ul21 192.0.2.66/32
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ip route del vrf v$ul21 192.0.2.65/32
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vlan_destroy $ul22 222
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vlan_destroy $ul22 111
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__simple_if_fini $ul22
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simple_if_fini $ul21 192.0.2.130/28
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}
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sw3_create()
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{
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simple_if_init $ul31 192.0.2.177/28
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__simple_if_init $ul32 v$ul31
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vlan_create $ul32 111 v$ul31 192.0.2.146/28
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vlan_create $ul32 222 v$ul31 192.0.2.162/28
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ip route add vrf v$ul31 192.0.2.66/32 via 192.0.2.178
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ip route add vrf v$ul31 192.0.2.65/32 \
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nexthop via 192.0.2.145 \
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nexthop via 192.0.2.161
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tc qdisc add dev $ul32 clsact
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tc filter add dev $ul32 ingress pref 111 prot 802.1Q \
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flower vlan_id 111 action pass
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tc filter add dev $ul32 ingress pref 222 prot 802.1Q \
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flower vlan_id 222 action pass
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}
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sw3_destroy()
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{
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tc qdisc del dev $ul32 clsact
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ip route del vrf v$ul31 192.0.2.65/32
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ip route del vrf v$ul31 192.0.2.66/32
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vlan_destroy $ul32 222
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vlan_destroy $ul32 111
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__simple_if_fini $ul32
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simple_if_fini $ul31 192.0.2.177/28
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}
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sw4_create()
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{
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simple_if_init $ol4 2001:db8:2::1/64
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__simple_if_init $ul4 v$ol4 192.0.2.178/28
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tunnel_create g2 gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol4
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__simple_if_init g2 v$ol4 192.0.2.66/32
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ip route add vrf v$ol4 192.0.2.65/32 via 192.0.2.177
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ip -6 route add vrf v$ol4 2001:db8:1::/64 dev g2
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}
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sw4_destroy()
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{
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ip -6 route del vrf v$ol4 2001:db8:1::/64
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ip route del vrf v$ol4 192.0.2.65/32
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__simple_if_fini g2 192.0.2.66/32
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tunnel_destroy g2
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__simple_if_fini $ul4 192.0.2.178/28
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simple_if_fini $ol4 2001:db8:2::1/64
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}
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h2_create()
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{
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simple_if_init $h2 2001:db8:2::2/64
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ip -6 route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
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}
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h2_destroy()
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{
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ip -6 route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
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simple_if_fini $h2 2001:db8:2::2/64
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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ol1=${NETIFS[p2]}
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ul1=${NETIFS[p3]}
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ul21=${NETIFS[p4]}
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ul22=${NETIFS[p5]}
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ul32=${NETIFS[p6]}
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ul31=${NETIFS[p7]}
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ul4=${NETIFS[p8]}
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ol4=${NETIFS[p9]}
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h2=${NETIFS[p10]}
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vrf_prepare
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h1_create
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sw1_create
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sw2_create
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sw3_create
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sw4_create
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h2_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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h2_destroy
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sw4_destroy
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sw3_destroy
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sw2_destroy
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sw1_destroy
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h1_destroy
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vrf_cleanup
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}
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multipath6_test()
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{
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local what=$1; shift
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local weight1=$1; shift
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local weight2=$1; shift
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sysctl_set net.ipv4.fib_multipath_hash_policy 2
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ip route replace vrf v$ul21 192.0.2.66/32 \
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nexthop via 192.0.2.146 weight $weight1 \
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nexthop via 192.0.2.162 weight $weight2
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local t0_111=$(tc_rule_stats_get $ul32 111 ingress)
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local t0_222=$(tc_rule_stats_get $ul32 222 ingress)
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ip vrf exec v$h1 \
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$MZ $h1 -6 -q -p 64 -A "2001:db8:1::2-2001:db8:1::1e" \
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-B "2001:db8:2::2-2001:db8:2::1e" \
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-d 1msec -c 50 -t udp "sp=1024,dp=1024"
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sleep 1
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local t1_111=$(tc_rule_stats_get $ul32 111 ingress)
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local t1_222=$(tc_rule_stats_get $ul32 222 ingress)
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local d111=$((t1_111 - t0_111))
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local d222=$((t1_222 - t0_222))
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multipath_eval "$what" $weight1 $weight2 $d111 $d222
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ip route replace vrf v$ul21 192.0.2.66/32 \
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nexthop via 192.0.2.146 \
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nexthop via 192.0.2.162
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sysctl_restore net.ipv4.fib_multipath_hash_policy
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}
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ping_ipv6()
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{
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ping_test $h1 2001:db8:2::2
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}
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multipath_ipv6()
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{
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log_info "Running IPv6 over GRE over IPv4 multipath tests"
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multipath6_test "ECMP" 1 1
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multipath6_test "Weighted MP 2:1" 2 1
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multipath6_test "Weighted MP 11:45" 11 45
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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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tests_run
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exit $EXIT_STATUS
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