name : ip6_gre_headroom.sh #!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Test that enough headroom is reserved for the first packet passing through an # IPv6 GRE-like netdevice. setup_prepare() { ip link add h1 type veth peer name swp1 ip link add h3 type veth peer name swp3 ip link set dev h1 up ip address add 192.0.2.1/28 dev h1 ip link add dev vh3 type vrf table 20 ip link set dev h3 master vh3 ip link set dev vh3 up ip link set dev h3 up ip link set dev swp3 up ip address add dev swp3 2001:db8:2::1/64 ip address add dev swp3 2001:db8:2::3/64 ip link set dev swp1 up tc qdisc add dev swp1 clsact ip link add name er6 type ip6erspan \ local 2001:db8:2::1 remote 2001:db8:2::2 oseq okey 123 ip link set dev er6 up ip link add name gt6 type ip6gretap \ local 2001:db8:2::3 remote 2001:db8:2::4 ip link set dev gt6 up sleep 1 } cleanup() { ip link del dev gt6 ip link del dev er6 ip link del dev swp1 ip link del dev swp3 ip link del dev vh3 } test_headroom() { local type=$1; shift local tundev=$1; shift tc filter add dev swp1 ingress pref 1000 matchall skip_hw \ action mirred egress mirror dev $tundev ping -I h1 192.0.2.2 -c 1 -w 2 &> /dev/null tc filter del dev swp1 ingress pref 1000 # If it doesn't panic, it passes. printf "TEST: %-60s [PASS]\n" "$type headroom" } trap cleanup EXIT setup_prepare test_headroom ip6gretap gt6 test_headroom ip6erspan er6