tools/testing/selftests/net/ip6_gre_headroom.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Test that enough headroom is reserved for the first packet passing through an
   5 # IPv6 GRE-like netdevice.
   6
   7 setup_prepare()
   8 {
   9         ip link add h1 type veth peer name swp1
  10         ip link add h3 type veth peer name swp3
  11
  12         ip link set dev h1 up
  13         ip address add 192.0.2.1/28 dev h1
  14
  15         ip link add dev vh3 type vrf table 20
  16         ip link set dev h3 master vh3
  17         ip link set dev vh3 up
  18         ip link set dev h3 up
  19
  20         ip link set dev swp3 up
  21         ip address add dev swp3 2001:db8:2::1/64
  22         ip address add dev swp3 2001:db8:2::3/64
  23
  24         ip link set dev swp1 up
  25         tc qdisc add dev swp1 clsact
  26
  27         ip link add name er6 type ip6erspan \
  28            local 2001:db8:2::1 remote 2001:db8:2::2 oseq okey 123
  29         ip link set dev er6 up
  30
  31         ip link add name gt6 type ip6gretap \
  32            local 2001:db8:2::3 remote 2001:db8:2::4
  33         ip link set dev gt6 up
  34
  35         sleep 1
  36 }
  37
  38 cleanup()
  39 {
  40         ip link del dev gt6
  41         ip link del dev er6
  42         ip link del dev swp1
  43         ip link del dev swp3
  44         ip link del dev vh3
  45 }
  46
  47 test_headroom()
  48 {
  49         local type=$1; shift
  50         local tundev=$1; shift
  51
  52         tc filter add dev swp1 ingress pref 1000 matchall skip_hw \
  53                 action mirred egress mirror dev $tundev
  54         ping -I h1 192.0.2.2 -c 1 -w 2 &> /dev/null
  55         tc filter del dev swp1 ingress pref 1000
  56
  57         # If it doesn't panic, it passes.
  58         printf "TEST: %-60s  [PASS]\n" "$type headroom"
  59 }
  60
  61 trap cleanup EXIT
  62
  63 setup_prepare
  64 test_headroom ip6gretap gt6
  65 test_headroom ip6erspan er6