tools/testing/selftests/net/test_vxlan_under_vrf.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # This test is for checking VXLAN underlay in a non-default VRF.
   5 #
   6 # It simulates two hypervisors running a VM each using four network namespaces:
   7 # two for the HVs, two for the VMs.
   8 # A small VXLAN tunnel is made between the two hypervisors to have the two vms
   9 # in the same virtual L2:
  10 #
  11 # +-------------------+                                    +-------------------+
  12 # |                   |                                    |                   |
  13 # |    vm-1 netns     |                                    |    vm-2 netns     |
  14 # |                   |                                    |                   |
  15 # |  +-------------+  |                                    |  +-------------+  |
  16 # |  |   veth-hv   |  |                                    |  |   veth-hv   |  |
  17 # |  | 10.0.0.1/24 |  |                                    |  | 10.0.0.2/24 |  |
  18 # |  +-------------+  |                                    |  +-------------+  |
  19 # |        .          |                                    |         .         |
  20 # +-------------------+                                    +-------------------+
  21 #          .                                                         .
  22 #          .                                                         .
  23 #          .                                                         .
  24 # +-----------------------------------+   +------------------------------------+
  25 # |        .                          |   |                          .         |
  26 # |  +----------+                     |   |                     +----------+   |
  27 # |  | veth-tap |                     |   |                     | veth-tap |   |
  28 # |  +----+-----+                     |   |                     +----+-----+   |
  29 # |       |                           |   |                          |         |
  30 # |    +--+--+      +--------------+  |   |  +--------------+     +--+--+      |
  31 # |    | br0 |      | vrf-underlay |  |   |  | vrf-underlay |     | br0 |      |
  32 # |    +--+--+      +-------+------+  |   |  +------+-------+     +--+--+      |
  33 # |       |                 |         |   |         |                |         |
  34 # |   +---+----+    +-------+-------+ |   | +-------+-------+    +---+----+    |
  35 # |   | vxlan0 |....|     veth0     |.|...|.|     veth0     |....| vxlan0 |    |
  36 # |   +--------+    | 172.16.0.1/24 | |   | | 172.16.0.2/24 |    +--------+    |
  37 # |                 +---------------+ |   | +---------------+                  |
  38 # |                                   |   |                                    |
  39 # |             hv-1 netns            |   |           hv-2 netns               |
  40 # |                                   |   |                                    |
  41 # +-----------------------------------+   +------------------------------------+
  42 #
  43 # This tests both the connectivity between vm-1 and vm-2, and that the underlay
  44 # can be moved in and out of the vrf by unsetting and setting veth0's master.
  45
  46 set -e
  47
  48 cleanup() {
  49     ip link del veth-hv-1 2>/dev/null || true
  50     ip link del veth-tap 2>/dev/null || true
  51
  52     for ns in hv-1 hv-2 vm-1 vm-2; do
  53         ip netns del $ns || true
  54     done
  55 }
  56
  57 # Clean start
  58 cleanup &> /dev/null
  59
  60 [[ $1 == "clean" ]] && exit 0
  61
  62 trap cleanup EXIT
  63
  64 # Setup "Hypervisors" simulated with netns
  65 ip link add veth-hv-1 type veth peer name veth-hv-2
  66 setup-hv-networking() {
  67     hv=$1
  68
  69     ip netns add hv-$hv
  70     ip link set veth-hv-$hv netns hv-$hv
  71     ip -netns hv-$hv link set veth-hv-$hv name veth0
  72
  73     ip -netns hv-$hv link add vrf-underlay type vrf table 1
  74     ip -netns hv-$hv link set vrf-underlay up
  75     ip -netns hv-$hv addr add 172.16.0.$hv/24 dev veth0
  76     ip -netns hv-$hv link set veth0 up
  77
  78     ip -netns hv-$hv link add br0 type bridge
  79     ip -netns hv-$hv link set br0 up
  80
  81     ip -netns hv-$hv link add vxlan0 type vxlan id 10 local 172.16.0.$hv dev veth0 dstport 4789
  82     ip -netns hv-$hv link set vxlan0 master br0
  83     ip -netns hv-$hv link set vxlan0 up
  84 }
  85 setup-hv-networking 1
  86 setup-hv-networking 2
  87
  88 # Check connectivity between HVs by pinging hv-2 from hv-1
  89 echo -n "Checking HV connectivity                                           "
  90 ip netns exec hv-1 ping -c 1 -W 1 172.16.0.2 &> /dev/null || (echo "[FAIL]"; false)
  91 echo "[ OK ]"
  92
  93 # Setups a "VM" simulated by a netns an a veth pair
  94 setup-vm() {
  95     id=$1
  96
  97     ip netns add vm-$id
  98     ip link add veth-tap type veth peer name veth-hv
  99
 100     ip link set veth-tap netns hv-$id
 101     ip -netns hv-$id link set veth-tap master br0
 102     ip -netns hv-$id link set veth-tap up
 103
 104     ip link set veth-hv netns vm-$id
 105     ip -netns vm-$id addr add 10.0.0.$id/24 dev veth-hv
 106     ip -netns vm-$id link set veth-hv up
 107 }
 108 setup-vm 1
 109 setup-vm 2
 110
 111 # Setup VTEP routes to make ARP work
 112 bridge -netns hv-1 fdb add 00:00:00:00:00:00 dev vxlan0 dst 172.16.0.2 self permanent
 113 bridge -netns hv-2 fdb add 00:00:00:00:00:00 dev vxlan0 dst 172.16.0.1 self permanent
 114
 115 echo -n "Check VM connectivity through VXLAN (underlay in the default VRF)  "
 116 ip netns exec vm-1 ping -c 1 -W 1 10.0.0.2 &> /dev/null || (echo "[FAIL]"; false)
 117 echo "[ OK ]"
 118
 119 # Move the underlay to a non-default VRF
 120 ip -netns hv-1 link set veth0 vrf vrf-underlay
 121 ip -netns hv-1 link set veth0 down
 122 ip -netns hv-1 link set veth0 up
 123 ip -netns hv-2 link set veth0 vrf vrf-underlay
 124 ip -netns hv-2 link set veth0 down
 125 ip -netns hv-2 link set veth0 up
 126
 127 echo -n "Check VM connectivity through VXLAN (underlay in a VRF)            "
 128 if ! ip netns exec vm-1 ping -c 1 -W 1 10.0.0.2 &> /dev/null; then
 129     echo "[XFAIL]"
 130 else
 131     echo "[ OK ]"
 132 fi