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selftests: forwarding: Add a test for VxLAN asymmetric routing with IPv6 

In asymmetric routing the ingress VTEP routes the packet into the
correct VxLAN tunnel, whereas the egress VTEP only bridges the packet to
the correct host. Therefore, packets in different directions use
different VNIs - the target VNI.

Add a test which is similar to the existing IPv4 test to check IPv6.

The test uses a simple topology with two VTEPs and two VNIs and verifies
that ping passes between hosts (local / remote) in the same VLAN (VNI)
and in different VLANs belonging to the same tenant (VRF).

While the test does not check VM mobility, it does configure an anycast
gateway using a macvlan device on both VTEPs.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Amit Cohen 2021-12-21 16:49:47 +02:00 committed by Jakub Kicinski
parent dc498cdda0
commit 2902bae465
1 changed files with 504 additions and 0 deletions
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504
tools/testing/selftests/net/forwarding/vxlan_asymmetric_ipv6.sh Executable file
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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# +--------------------------------+ +-----------------------------+
# | vrf-h1 | | vrf-h2 |
# | + $h1 | | + $h2 |
# | | 2001:db8:1::1/64 | | | 2001:db8:2::1/64 |
# | | default via 2001:db8:1::3 | | | default via 2001:db8:2::3 |
# +----|---------------------------+ +-|---------------------------+
# | |
# +----|------------------------------------------|---------------------------+
# | SW | | |
# | +--|------------------------------------------|-------------------------+ |
# | | + $swp1 br1 + $swp2 | |
# | | vid 10 pvid untagged vid 20 pvid untagged | |
# | | | |
# | | + vx10 + vx20 | |
# | | local 2001:db8:3::1 local 2001:db8:3::1 | |
# | | remote 2001:db8:3::2 remote 2001:db8:3::2 | |
# | | id 1000 id 2000 | |
# | | dstport 4789 dstport 4789 | |
# | | vid 10 pvid untagged vid 20 pvid untagged | |
# | | | |
# | +-----------------------------------+-----------------------------------+ |
# | | |
# | +-----------------------------------|-----------------------------------+ |
# | | | | |
# | | +--------------------------------+--------------------------------+ | |
# | | | | | |
# | | + vlan10 vlan20 + | |
# | | | 2001:db8:1::2/64 2001:db8:2::2/64 | | |
# | | | | | |
# | | + vlan10-v (macvlan) vlan20-v (macvlan) + | |
# | | 2001:db8:1::3/64 2001:db8:2::3/64 | |
# | | 00:00:5e:00:01:01 00:00:5e:00:01:01 | |
# | | vrf-green | |
# | +-----------------------------------------------------------------------+ |
# | |
# | + $rp1 +lo |
# | | 2001:db8:4::1/64 2001:db8:3::1/128 |
# +----|----------------------------------------------------------------------+
# |
# +----|--------------------------------------------------------+
# | | vrf-spine |
# | + $rp2 |
# | 2001:db8:4::2/64 |
# | | (maybe) HW
# =============================================================================
# | | (likely) SW
# | |
# | + v1 (veth) |
# | | 2001:db8:5::2/64 |
# +----|--------------------------------------------------------+
# |
# +----|----------------------------------------------------------------------+
# | + v2 (veth) +lo NS1 (netns) |
# | 2001:db8:5::1/64 2001:db8:3::2/128 |
# | |
# | +-----------------------------------------------------------------------+ |
# | | vrf-green | |
# | | + vlan10-v (macvlan) vlan20-v (macvlan) + | |
# | | | 2001:db8:1::3/64 2001:db8:2::3/64 | | |
# | | | 00:00:5e:00:01:01 00:00:5e:00:01:01 | | |
# | | | | | |
# | | + vlan10 vlan20 + | |
# | | | 2001:db8:1::3/64 2001:db8:2::3/64 | | |
# | | | | | |
# | | +--------------------------------+--------------------------------+ | |
# | | | | |
# | +-----------------------------------|-----------------------------------+ |
# | | |
# | +-----------------------------------+-----------------------------------+ |
# | | | |
# | | + vx10 + vx20 | |
# | | local 2001:db8:3::2 local 2001:db8:3::2 | |
# | | remote 2001:db8:3::1 remote 2001:db8:3::1 | |
# | | id 1000 id 2000 | |
# | | dstport 4789 dstport 4789 | |
# | | vid 10 pvid untagged vid 20 pvid untagged | |
# | | | |
# | | + w1 (veth) + w3 (veth) | |
# | | | vid 10 pvid untagged br1 | vid 20 pvid untagged | |
# | +--|------------------------------------------|-------------------------+ |
# | | | |
# | | | |
# | +--|----------------------+ +--|-------------------------+ |
# | | | vrf-h1 | | | vrf-h2 | |
# | | + w2 (veth) | | + w4 (veth) | |
# | | 2001:db8:1::4/64 | | 2001:db8:2::4/64 | |
# | | default via | | default via | |
# | | 2001:db8:1::3/64 | | 2001:db8:2::3/64 | |
# | +-------------------------+ +----------------------------+ |
# +---------------------------------------------------------------------------+
ALL_TESTS="
ping_ipv6
arp_decap
"
NUM_NETIFS=6
source lib.sh
require_command $ARPING
hx_create()
{
local vrf_name=$1; shift
local if_name=$1; shift
local ip_addr=$1; shift
local gw_ip=$1; shift
vrf_create $vrf_name
ip link set dev $if_name master $vrf_name
ip link set dev $vrf_name up
ip link set dev $if_name up
ip address add $ip_addr/64 dev $if_name
ip neigh replace $gw_ip lladdr 00:00:5e:00:01:01 nud permanent \
dev $if_name
ip route add default vrf $vrf_name nexthop via $gw_ip
}
export -f hx_create
hx_destroy()
{
local vrf_name=$1; shift
local if_name=$1; shift
local ip_addr=$1; shift
local gw_ip=$1; shift
ip route del default vrf $vrf_name nexthop via $gw_ip
ip neigh del $gw_ip dev $if_name
ip address del $ip_addr/64 dev $if_name
ip link set dev $if_name down
vrf_destroy $vrf_name
}
h1_create()
{
hx_create "vrf-h1" $h1 2001:db8:1::1 2001:db8:1::3
}
h1_destroy()
{
hx_destroy "vrf-h1" $h1 2001:db8:1::1 2001:db8:1::3
}
h2_create()
{
hx_create "vrf-h2" $h2 2001:db8:2::1 2001:db8:2::3
}
h2_destroy()
{
hx_destroy "vrf-h2" $h2 2001:db8:2::1 2001:db8:2::3
}
switch_create()
{
ip link add name br1 type bridge vlan_filtering 1 vlan_default_pvid 0 \
mcast_snooping 0
# Make sure the bridge uses the MAC address of the local port and not
# that of the VxLAN's device.
ip link set dev br1 address $(mac_get $swp1)
ip link set dev br1 up
ip link set dev $rp1 up
ip address add dev $rp1 2001:db8:4::1/64
ip route add 2001:db8:3::2/128 nexthop via 2001:db8:4::2
ip link add name vx10 type vxlan id 1000 \
local 2001:db8:3::1 remote 2001:db8:3::2 dstport 4789 \
nolearning udp6zerocsumrx udp6zerocsumtx tos inherit ttl 100
ip link set dev vx10 up
ip link set dev vx10 master br1
bridge vlan add vid 10 dev vx10 pvid untagged
ip link add name vx20 type vxlan id 2000 \
local 2001:db8:3::1 remote 2001:db8:3::2 dstport 4789 \
nolearning udp6zerocsumrx udp6zerocsumtx tos inherit ttl 100
ip link set dev vx20 up
ip link set dev vx20 master br1
bridge vlan add vid 20 dev vx20 pvid untagged
ip link set dev $swp1 master br1
ip link set dev $swp1 up
bridge vlan add vid 10 dev $swp1 pvid untagged
ip link set dev $swp2 master br1
ip link set dev $swp2 up
bridge vlan add vid 20 dev $swp2 pvid untagged
ip address add 2001:db8:3::1/128 dev lo
# Create SVIs
vrf_create "vrf-green"
ip link set dev vrf-green up
ip link add link br1 name vlan10 up master vrf-green type vlan id 10
ip address add 2001:db8:1::2/64 dev vlan10
ip link add link vlan10 name vlan10-v up master vrf-green \
address 00:00:5e:00:01:01 type macvlan mode private
ip address add 2001:db8:1::3/64 dev vlan10-v
ip link add link br1 name vlan20 up master vrf-green type vlan id 20
ip address add 2001:db8:2::2/64 dev vlan20
ip link add link vlan20 name vlan20-v up master vrf-green \
address 00:00:5e:00:01:01 type macvlan mode private
ip address add 2001:db8:2::3/64 dev vlan20-v
bridge vlan add vid 10 dev br1 self
bridge vlan add vid 20 dev br1 self
bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 10
bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 20
}
switch_destroy()
{
bridge fdb del 00:00:5e:00:01:01 dev br1 self local vlan 20
bridge fdb del 00:00:5e:00:01:01 dev br1 self local vlan 10
bridge vlan del vid 20 dev br1 self
bridge vlan del vid 10 dev br1 self
ip link del dev vlan20
ip link del dev vlan10
vrf_destroy "vrf-green"
ip address del 2001:db8:3::1/128 dev lo
bridge vlan del vid 20 dev $swp2
ip link set dev $swp2 down
ip link set dev $swp2 nomaster
bridge vlan del vid 10 dev $swp1
ip link set dev $swp1 down
ip link set dev $swp1 nomaster
bridge vlan del vid 20 dev vx20
ip link set dev vx20 nomaster
ip link set dev vx20 down
ip link del dev vx20
bridge vlan del vid 10 dev vx10
ip link set dev vx10 nomaster
ip link set dev vx10 down
ip link del dev vx10
ip route del 2001:db8:3::2 nexthop via 2001:db8:4::2
ip address del dev $rp1 2001:db8:4::1/64
ip link set dev $rp1 down
ip link set dev br1 down
ip link del dev br1
}
spine_create()
{
vrf_create "vrf-spine"
ip link set dev $rp2 master vrf-spine
ip link set dev v1 master vrf-spine
ip link set dev vrf-spine up
ip link set dev $rp2 up
ip link set dev v1 up
ip address add 2001:db8:4::2/64 dev $rp2
ip address add 2001:db8:5::2/64 dev v1
ip route add 2001:db8:3::1/128 vrf vrf-spine nexthop via \
2001:db8:4::1
ip route add 2001:db8:3::2/128 vrf vrf-spine nexthop via \
2001:db8:5::1
}
spine_destroy()
{
ip route del 2001:db8:3::2/128 vrf vrf-spine nexthop via \
2001:db8:5::1
ip route del 2001:db8:3::1/128 vrf vrf-spine nexthop via \
2001:db8:4::1
ip address del 2001:db8:5::2/64 dev v1
ip address del 2001:db8:4::2/64 dev $rp2
ip link set dev v1 down
ip link set dev $rp2 down
vrf_destroy "vrf-spine"
}
ns_h1_create()
{
hx_create "vrf-h1" w2 2001:db8:1::4 2001:db8:1::3
}
export -f ns_h1_create
ns_h2_create()
{
hx_create "vrf-h2" w4 2001:db8:2::4 2001:db8:2::3
}
export -f ns_h2_create
ns_switch_create()
{
ip link add name br1 type bridge vlan_filtering 1 vlan_default_pvid 0 \
mcast_snooping 0
ip link set dev br1 up
ip link set dev v2 up
ip address add dev v2 2001:db8:5::1/64
ip route add 2001:db8:3::1 nexthop via 2001:db8:5::2
ip link add name vx10 type vxlan id 1000 \
local 2001:db8:3::2 remote 2001:db8:3::1 dstport 4789 \
nolearning udp6zerocsumrx udp6zerocsumtx tos inherit ttl 100
ip link set dev vx10 up
ip link set dev vx10 master br1
bridge vlan add vid 10 dev vx10 pvid untagged
ip link add name vx20 type vxlan id 2000 \
local 2001:db8:3::2 remote 2001:db8:3::1 dstport 4789 \
nolearning udp6zerocsumrx udp6zerocsumtx tos inherit ttl 100
ip link set dev vx20 up
ip link set dev vx20 master br1
bridge vlan add vid 20 dev vx20 pvid untagged
ip link set dev w1 master br1
ip link set dev w1 up
bridge vlan add vid 10 dev w1 pvid untagged
ip link set dev w3 master br1
ip link set dev w3 up
bridge vlan add vid 20 dev w3 pvid untagged
ip address add 2001:db8:3::2/128 dev lo
# Create SVIs
vrf_create "vrf-green"
ip link set dev vrf-green up
ip link add link br1 name vlan10 up master vrf-green type vlan id 10
ip address add 2001:db8:1::3/64 dev vlan10
ip link add link vlan10 name vlan10-v up master vrf-green \
address 00:00:5e:00:01:01 type macvlan mode private
ip address add 2001:db8:1::3/64 dev vlan10-v
ip link add link br1 name vlan20 up master vrf-green type vlan id 20
ip address add 2001:db8:2::3/64 dev vlan20
ip link add link vlan20 name vlan20-v up master vrf-green \
address 00:00:5e:00:01:01 type macvlan mode private
ip address add 2001:db8:2::3/64 dev vlan20-v
bridge vlan add vid 10 dev br1 self
bridge vlan add vid 20 dev br1 self
bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 10
bridge fdb add 00:00:5e:00:01:01 dev br1 self local vlan 20
}
export -f ns_switch_create
ns_init()
{
ip link add name w1 type veth peer name w2
ip link add name w3 type veth peer name w4
ip link set dev lo up
ns_h1_create
ns_h2_create
ns_switch_create
}
export -f ns_init
ns1_create()
{
ip netns add ns1
ip link set dev v2 netns ns1
in_ns ns1 ns_init
}
ns1_destroy()
{
ip netns exec ns1 ip link set dev v2 netns 1
ip netns del ns1
}
macs_populate()
{
local mac1=$1; shift
local mac2=$1; shift
local ip1=$1; shift
local ip2=$1; shift
local dst=$1; shift
bridge fdb add $mac1 dev vx10 self master extern_learn static \
dst $dst vlan 10
bridge fdb add $mac2 dev vx20 self master extern_learn static \
dst $dst vlan 20
ip neigh add $ip1 lladdr $mac1 nud noarp dev vlan10 \
extern_learn
ip neigh add $ip2 lladdr $mac2 nud noarp dev vlan20 \
extern_learn
}
export -f macs_populate
macs_initialize()
{
local h1_ns_mac=$(in_ns ns1 mac_get w2)
local h2_ns_mac=$(in_ns ns1 mac_get w4)
local h1_mac=$(mac_get $h1)
local h2_mac=$(mac_get $h2)
macs_populate $h1_ns_mac $h2_ns_mac 2001:db8:1::4 2001:db8:2::4 \
2001:db8:3::2
in_ns ns1 macs_populate $h1_mac $h2_mac 2001:db8:1::1 2001:db8:2::1 \
2001:db8:3::1
}
setup_prepare()
{
h1=${NETIFS[p1]}
swp1=${NETIFS[p2]}
swp2=${NETIFS[p3]}
h2=${NETIFS[p4]}
rp1=${NETIFS[p5]}
rp2=${NETIFS[p6]}
vrf_prepare
forwarding_enable
h1_create
h2_create
switch_create
ip link add name v1 type veth peer name v2
spine_create
ns1_create
in_ns ns1 forwarding_enable
macs_initialize
}
cleanup()
{
pre_cleanup
ns1_destroy
spine_destroy
ip link del dev v1
switch_destroy
h2_destroy
h1_destroy
forwarding_restore
vrf_cleanup
}
ping_ipv6()
{
ping6_test $h1 2001:db8:2::1 ": local->local vid 10->vid 20"
ping6_test $h1 2001:db8:1::4 ": local->remote vid 10->vid 10"
ping6_test $h2 2001:db8:2::4 ": local->remote vid 20->vid 20"
ping6_test $h1 2001:db8:2::4 ": local->remote vid 10->vid 20"
ping6_test $h2 2001:db8:1::4 ": local->remote vid 20->vid 10"
}
arp_decap()
{
# Repeat the ping tests, but without populating the neighbours. This
# makes sure we correctly decapsulate ARP packets
log_info "deleting neighbours from vlan interfaces"
ip neigh del 2001:db8:1::4 dev vlan10
ip neigh del 2001:db8:2::4 dev vlan20
ping_ipv6
ip neigh replace 2001:db8:1::4 lladdr $(in_ns ns1 mac_get w2) \
nud noarp dev vlan10 extern_learn
ip neigh replace 2001:db8:2::4 lladdr $(in_ns ns1 mac_get w4) \
nud noarp dev vlan20 extern_learn
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS