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