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Message-Id: <20181203095441.17467-5-abauvin@scaleway.com>
Date: Mon, 3 Dec 2018 10:54:41 +0100
From: Alexis Bauvin <abauvin@...leway.com>
To: dsa@...ulusnetworks.com, roopa@...ulusnetworks.com,
stephen@...workplumber.org, davem@...emloft.net
Cc: netdev@...r.kernel.org, abauvin@...leway.com,
akherbouche@...leway.com
Subject: [PATCH v7 4/4] test/net: Add script for VXLAN underlay in a VRF
This script tests the support of a VXLAN underlay in a non-default VRF.
It does so by simulating two hypervisors and two VMs, an extended L2
between the VMs with the hypervisors as VTEPs with the underlay in a
VRF, and finally by pinging the two VMs.
It also tests that moving the underlay from a VRF to another works when
down/up the VXLAN interface.
Signed-off-by: Alexis Bauvin <abauvin@...leway.com>
Reviewed-by: Amine Kherbouche <akherbouche@...leway.com>
Reviewed-by: David Ahern <dsahern@...il.com>
Tested-by: Amine Kherbouche <akherbouche@...leway.com>
---
tools/testing/selftests/net/Makefile | 1 +
.../selftests/net/test_vxlan_under_vrf.sh | 129 ++++++++++++++++++
2 files changed, 130 insertions(+)
create mode 100755 tools/testing/selftests/net/test_vxlan_under_vrf.sh
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 919aa2ac00af..d45295ca56ce 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -7,6 +7,7 @@ CFLAGS += -I../../../../usr/include/
TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetlink.sh
TEST_PROGS += fib_tests.sh fib-onlink-tests.sh pmtu.sh udpgso.sh
TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh
+TEST_PROGS += test_vxlan_under_vrf.sh
TEST_PROGS_EXTENDED := in_netns.sh
TEST_GEN_FILES = socket
TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy
diff --git a/tools/testing/selftests/net/test_vxlan_under_vrf.sh b/tools/testing/selftests/net/test_vxlan_under_vrf.sh
new file mode 100755
index 000000000000..09f9ed92cbe4
--- /dev/null
+++ b/tools/testing/selftests/net/test_vxlan_under_vrf.sh
@@ -0,0 +1,129 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# This test is for checking VXLAN underlay in a non-default VRF.
+#
+# It simulates two hypervisors running a VM each using four network namespaces:
+# two for the HVs, two for the VMs.
+# A small VXLAN tunnel is made between the two hypervisors to have the two vms
+# in the same virtual L2:
+#
+# +-------------------+ +-------------------+
+# | | | |
+# | vm-1 netns | | vm-2 netns |
+# | | | |
+# | +-------------+ | | +-------------+ |
+# | | veth-hv | | | | veth-hv | |
+# | | 10.0.0.1/24 | | | | 10.0.0.2/24 | |
+# | +-------------+ | | +-------------+ |
+# | . | | . |
+# +-------------------+ +-------------------+
+# . .
+# . .
+# . .
+# +-----------------------------------+ +------------------------------------+
+# | . | | . |
+# | +----------+ | | +----------+ |
+# | | veth-tap | | | | veth-tap | |
+# | +----+-----+ | | +----+-----+ |
+# | | | | | |
+# | +--+--+ +--------------+ | | +--------------+ +--+--+ |
+# | | br0 | | vrf-underlay | | | | vrf-underlay | | br0 | |
+# | +--+--+ +-------+------+ | | +------+-------+ +--+--+ |
+# | | | | | | | |
+# | +---+----+ +-------+-------+ | | +-------+-------+ +---+----+ |
+# | | vxlan0 |....| veth0 |.|...|.| veth0 |....| vxlan0 | |
+# | +--------+ | 172.16.0.1/24 | | | | 172.16.0.2/24 | +--------+ |
+# | +---------------+ | | +---------------+ |
+# | | | |
+# | hv-1 netns | | hv-2 netns |
+# | | | |
+# +-----------------------------------+ +------------------------------------+
+#
+# This tests both the connectivity between vm-1 and vm-2, and that the underlay
+# can be moved in and out of the vrf by unsetting and setting veth0's master.
+
+set -e
+
+cleanup() {
+ ip link del veth-hv-1 2>/dev/null || true
+ ip link del veth-tap 2>/dev/null || true
+
+ for ns in hv-1 hv-2 vm-1 vm-2; do
+ ip netns del $ns || true
+ done
+}
+
+# Clean start
+cleanup &> /dev/null
+
+[[ $1 == "clean" ]] && exit 0
+
+trap cleanup EXIT
+
+# Setup "Hypervisors" simulated with netns
+ip link add veth-hv-1 type veth peer name veth-hv-2
+setup-hv-networking() {
+ hv=$1
+
+ ip netns add hv-$hv
+ ip link set veth-hv-$hv netns hv-$hv
+ ip -netns hv-$hv link set veth-hv-$hv name veth0
+
+ ip -netns hv-$hv link add vrf-underlay type vrf table 1
+ ip -netns hv-$hv link set vrf-underlay up
+ ip -netns hv-$hv addr add 172.16.0.$hv/24 dev veth0
+ ip -netns hv-$hv link set veth0 up
+
+ ip -netns hv-$hv link add br0 type bridge
+ ip -netns hv-$hv link set br0 up
+
+ ip -netns hv-$hv link add vxlan0 type vxlan id 10 local 172.16.0.$hv dev veth0 dstport 4789
+ ip -netns hv-$hv link set vxlan0 master br0
+ ip -netns hv-$hv link set vxlan0 up
+}
+setup-hv-networking 1
+setup-hv-networking 2
+
+# Check connectivity between HVs by pinging hv-2 from hv-1
+echo -n "Checking HV connectivity "
+ip netns exec hv-1 ping -c 1 -W 1 172.16.0.2 &> /dev/null || (echo "[FAIL]"; false)
+echo "[ OK ]"
+
+# Setups a "VM" simulated by a netns an a veth pair
+setup-vm() {
+ id=$1
+
+ ip netns add vm-$id
+ ip link add veth-tap type veth peer name veth-hv
+
+ ip link set veth-tap netns hv-$id
+ ip -netns hv-$id link set veth-tap master br0
+ ip -netns hv-$id link set veth-tap up
+
+ ip link set veth-hv netns vm-$id
+ ip -netns vm-$id addr add 10.0.0.$id/24 dev veth-hv
+ ip -netns vm-$id link set veth-hv up
+}
+setup-vm 1
+setup-vm 2
+
+# Setup VTEP routes to make ARP work
+bridge -netns hv-1 fdb add 00:00:00:00:00:00 dev vxlan0 dst 172.16.0.2 self permanent
+bridge -netns hv-2 fdb add 00:00:00:00:00:00 dev vxlan0 dst 172.16.0.1 self permanent
+
+echo -n "Check VM connectivity through VXLAN (underlay in the default VRF) "
+ip netns exec vm-1 ping -c 1 -W 1 10.0.0.2 &> /dev/null || (echo "[FAIL]"; false)
+echo "[ OK ]"
+
+# Move the underlay to a non-default VRF
+ip -netns hv-1 link set veth0 vrf vrf-underlay
+ip -netns hv-1 link set veth0 down
+ip -netns hv-1 link set veth0 up
+ip -netns hv-2 link set veth0 vrf vrf-underlay
+ip -netns hv-2 link set veth0 down
+ip -netns hv-2 link set veth0 up
+
+echo -n "Check VM connectivity through VXLAN (underlay in a VRF) "
+ip netns exec vm-1 ping -c 1 -W 1 10.0.0.2 &> /dev/null || (echo "[FAIL]"; false)
+echo "[ OK ]"
--
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