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
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