Commit a9f8f40a authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'selftests-forwarding-Add-tests-for-VXLAN-routing' 



Ido Schimmel says:

====================
selftests: forwarding: Add tests for VXLAN routing

VXLAN routing allows hosts in different overlay networks (i.e.,
different VNIs) to communicate with one another.

Two popular routing models are asymmetric and symmetric routing.

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.

In symmetric routing both the ingress and egress VTEPs perform routing
in the overlay network into / from the VXLAN tunnel. Packets in
different directions use the same VNI - the L3 VNI. Different tenants
(VRFs) use different L3 VNIs.

Patch #1 adds a test for asymmetric routing. Patches #2-#3 reuse the
topology and add test cases for ARP decapsulation and suppression.

Patch #4 adds a test for symmetric routing.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents a2ff7e49 4dba72fd

tools/testing/selftests/net/forwarding/vxlan_asymmetric.sh

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#!/bin/bash

# SPDX-License-Identifier: GPL-2.0



# +---------------------------+                +------------------------------+

# |                    vrf-h1 |                |                       vrf-h2 |

# |    + $h1                  |                |    + $h2                     |

# |    | 10.1.1.101/24        |                |    | 10.1.2.101/24           |

# |    | default via 10.1.1.1 |                |    | default via 10.1.2.1    |

# +----|----------------------+                +----|-------------------------+

#      |                                            |

# +----|--------------------------------------------|-------------------------+

# | SW |                                            |                         |

# | +--|--------------------------------------------|-----------------------+ |

# | |  + $swp1                         br1          + $swp2                 | |

# | |     vid 10 pvid untagged                         vid 20 pvid untagged | |

# | |                                                                       | |

# | |  + vx10                                       + vx20                  | |

# | |    local 10.0.0.1                               local 10.0.0.1        | |

# | |    remote 10.0.0.2                              remote 10.0.0.2       | |

# | |    id 1000                                      id 2000               | |

# | |    dstport 4789                                 dstport 4789          | |

# | |    vid 10 pvid untagged                         vid 20 pvid untagged  | |

# | |                                                                       | |

# | +-----------------------------------+-----------------------------------+ |

# |                                     |                                     |

# | +-----------------------------------|-----------------------------------+ |

# | |                                   |                                   | |

# | |  +--------------------------------+--------------------------------+  | |

# | |  |                                                                 |  | |

# | |  + vlan10                                                   vlan20 +  | |

# | |  | 10.1.1.11/24                                       10.1.2.11/24 |  | |

# | |  |                                                                 |  | |

# | |  + vlan10-v (macvlan)                           vlan20-v (macvlan) +  | |

# | |    10.1.1.1/24                                         10.1.2.1/24    | |

# | |    00:00:5e:00:01:01                             00:00:5e:00:01:01    | |

# | |                               vrf-green                               | |

# | +-----------------------------------------------------------------------+ |

# |                                                                           |

# |    + $rp1                                       +lo                       |

# |    | 192.0.2.1/24                                10.0.0.1/32              |

# +----|----------------------------------------------------------------------+

#      |

# +----|--------------------------------------------------------+

# |    |                            vrf-spine                   |

# |    + $rp2                                                   |

# |      192.0.2.2/24                                           |

# |                                                             |   (maybe) HW

# =============================================================================

# |                                                             |  (likely) SW

# |                                                             |

# |    + v1 (veth)                                              |

# |    | 192.0.3.2/24                                           |

# +----|--------------------------------------------------------+

#      |

# +----|----------------------------------------------------------------------+

# |    + v2 (veth)                                  +lo           NS1 (netns) |

# |      192.0.3.1/24                                10.0.0.2/32              |

# |                                                                           |

# | +-----------------------------------------------------------------------+ |

# | |                               vrf-green                               | |

# | |  + vlan10-v (macvlan)                           vlan20-v (macvlan) +  | |

# | |  | 10.1.1.1/24                                         10.1.2.1/24 |  | |

# | |  | 00:00:5e:00:01:01                             00:00:5e:00:01:01 |  | |

# | |  |                                                                 |  | |

# | |  + vlan10                                                   vlan20 +  | |

# | |  | 10.1.1.12/24                                       10.1.2.12/24 |  | |

# | |  |                                                                 |  | |

# | |  +--------------------------------+--------------------------------+  | |

# | |                                   |                                   | |

# | +-----------------------------------|-----------------------------------+ |

# |                                     |                                     |

# | +-----------------------------------+-----------------------------------+ |

# | |                                                                       | |

# | |  + vx10                                     + vx20                    | |

# | |    local 10.0.0.2                             local 10.0.0.2          | |

# | |    remote 10.0.0.1                            remote 10.0.0.1         | |

# | |    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)               | |

# | |    10.1.1.102/24        |                |    10.1.2.102/24           | |

# | |    default via 10.1.1.1 |                |    default via 10.1.2.1    | |

# | +-------------------------+                +----------------------------+ |

# +---------------------------------------------------------------------------+



ALL_TESTS="

	ping_ipv4

	arp_decap

	arp_suppression

"

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/24 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/24 dev $if_name



	ip link set dev $if_name down

	vrf_destroy $vrf_name

}



h1_create()

{

	hx_create "vrf-h1" $h1 10.1.1.101 10.1.1.1

}



h1_destroy()

{

	hx_destroy "vrf-h1" $h1 10.1.1.101 10.1.1.1

}



h2_create()

{

	hx_create "vrf-h2" $h2 10.1.2.101 10.1.2.1

}



h2_destroy()

{

	hx_destroy "vrf-h2" $h2 10.1.2.101 10.1.2.1

}



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 192.0.2.1/24

	ip route add 10.0.0.2/32 nexthop via 192.0.2.2



	ip link add name vx10 type vxlan id 1000		\

		local 10.0.0.1 remote 10.0.0.2 dstport 4789	\

		nolearning noudpcsum 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 10.0.0.1 remote 10.0.0.2 dstport 4789	\

		nolearning noudpcsum 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 10.0.0.1/32 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 10.1.1.11/24 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 10.1.1.1/24 dev vlan10-v



	ip link add link br1 name vlan20 up master vrf-green type vlan id 20

	ip address add 10.1.2.11/24 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 10.1.2.1/24 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 10.0.0.1/32 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 10.0.0.2/32 nexthop via 192.0.2.2

	ip address del dev $rp1 192.0.2.1/24

	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 192.0.2.2/24 dev $rp2

	ip address add 192.0.3.2/24 dev v1



	ip route add 10.0.0.1/32 vrf vrf-spine nexthop via 192.0.2.1

	ip route add 10.0.0.2/32 vrf vrf-spine nexthop via 192.0.3.1

}



spine_destroy()

{

	ip route del 10.0.0.2/32 vrf vrf-spine nexthop via 192.0.3.1

	ip route del 10.0.0.1/32 vrf vrf-spine nexthop via 192.0.2.1



	ip address del 192.0.3.2/24 dev v1

	ip address del 192.0.2.2/24 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 10.1.1.102 10.1.1.1

}

export -f ns_h1_create



ns_h2_create()

{

	hx_create "vrf-h2" w4 10.1.2.102 10.1.2.1

}

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 192.0.3.1/24

	ip route add 10.0.0.1/32 nexthop via 192.0.3.2



	ip link add name vx10 type vxlan id 1000		\

		local 10.0.0.2 remote 10.0.0.1 dstport 4789	\

		nolearning noudpcsum 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 10.0.0.2 remote 10.0.0.1 dstport 4789	\

		nolearning noudpcsum 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 10.0.0.2/32 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 10.1.1.12/24 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 10.1.1.1/24 dev vlan10-v



	ip link add link br1 name vlan20 up master vrf-green type vlan id 20

	ip address add 10.1.2.12/24 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 10.1.2.1/24 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 10.1.1.102 10.1.2.102 10.0.0.2

	in_ns ns1 macs_populate $h1_mac $h2_mac 10.1.1.101 10.1.2.101 10.0.0.1

}



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



	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_ipv4()

{

	ping_test $h1 10.1.2.101 ": local->local vid 10->vid 20"

	ping_test $h1 10.1.1.102 ": local->remote vid 10->vid 10"

	ping_test $h2 10.1.2.102 ": local->remote vid 20->vid 20"

	ping_test $h1 10.1.2.102 ": local->remote vid 10->vid 20"

	ping_test $h2 10.1.1.102 ": 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 10.1.1.102 dev vlan10

	ip neigh del 10.1.2.102 dev vlan20



	ping_ipv4



	ip neigh replace 10.1.1.102 lladdr $(in_ns ns1 mac_get w2) nud noarp \

		dev vlan10 extern_learn

	ip neigh replace 10.1.2.102 lladdr $(in_ns ns1 mac_get w4) nud noarp \

		dev vlan20 extern_learn

}



arp_suppression_compare()

{

	local expect=$1; shift

	local actual=$(in_ns ns1 tc_rule_stats_get vx10 1 ingress)



	(( expect == actual ))

	check_err $? "expected $expect arps got $actual"

}



arp_suppression()

{

	ip link set dev vx10 type bridge_slave neigh_suppress on



	in_ns ns1 tc qdisc add dev vx10 clsact

	in_ns ns1 tc filter add dev vx10 ingress proto arp pref 1 handle 101 \

		flower dst_mac ff:ff:ff:ff:ff:ff arp_tip 10.1.1.102 arp_op \

		request action pass



	# The neighbour is configured on the SVI and ARP suppression is on, so

	# the ARP request should be suppressed

	RET=0



	$ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102

	check_err $? "arping failed"



	arp_suppression_compare 0



	log_test "neigh_suppress: on / neigh exists: yes"



	# Delete the neighbour from the the SVI. A single ARP request should be

	# received by the remote VTEP

	RET=0



	ip neigh del 10.1.1.102 dev vlan10



	$ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102

	check_err $? "arping failed"



	arp_suppression_compare 1



	log_test "neigh_suppress: on / neigh exists: no"



	# Turn off ARP suppression and make sure ARP is not suppressed,

	# regardless of neighbour existence on the SVI

	RET=0



	ip neigh del 10.1.1.102 dev vlan10 &> /dev/null

	ip link set dev vx10 type bridge_slave neigh_suppress off



	$ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102

	check_err $? "arping failed"



	arp_suppression_compare 2



	log_test "neigh_suppress: off / neigh exists: no"



	RET=0



	ip neigh add 10.1.1.102 lladdr $(in_ns ns1 mac_get w2) nud noarp \

		dev vlan10 extern_learn



	$ARPING -I $h1 -fqb -c 1 -w 1 10.1.1.102

	check_err $? "arping failed"



	arp_suppression_compare 3



	log_test "neigh_suppress: off / neigh exists: yes"



	in_ns ns1 tc qdisc del dev vx10 clsact

}



trap cleanup EXIT



setup_prepare

setup_wait



tests_run



exit $EXIT_STATUS

tools/testing/selftests/net/forwarding/vxlan_symmetric.sh

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