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Commit 03f1c26b authored by Alexis Bauvin's avatar Alexis Bauvin Committed by David S. Miller
Browse files

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: default avatarAlexis Bauvin <abauvin@scaleway.com>
Reviewed-by: default avatarAmine Kherbouche <akherbouche@scaleway.com>
Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
Tested-by: default avatarAmine Kherbouche <akherbouche@scaleway.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aab8cc36

tools/testing/selftests/net/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +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 ip_defrag.sh

TEST_PROGS += udpgso_bench.sh fib_rule_tests.sh msg_zerocopy.sh psock_snd.sh

TEST_PROGS += udpgro_bench.sh udpgro.sh

TEST_PROGS += udpgro_bench.sh udpgro.sh test_vxlan_under_vrf.sh

TEST_PROGS_EXTENDED := in_netns.sh

TEST_GEN_FILES =  socket

TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy

tools/testing/selftests/net/test_vxlan_under_vrf.sh

0 → 100755
+129 −0
Original line number Diff line number Diff line 
#!/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 ]"