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#!/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
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