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selftests/bpf: convert bpf tunnel test to encap modes 

Make the tests correctly annotate skbs with tunnel metadata.

This makes the gso tests succeed. Enable them.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Willem de Bruijn 2019-03-22 14:33:00 -04:00 committed by Alexei Starovoitov
parent 94f16813e1
commit 75a1a9fa2e
2 changed files with 19 additions and 10 deletions
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19
tools/testing/selftests/bpf/progs/test_tc_tunnel.c
View File

@ -70,8 +70,13 @@ static __always_inline int encap_ipv4(struct __sk_buff *skb, bool with_gre)
if (tcph.dest != __bpf_constant_htons(cfg_port)) if (tcph.dest != __bpf_constant_htons(cfg_port))
return TC_ACT_OK; return TC_ACT_OK;
flags = BPF_F_ADJ_ROOM_FIXED_GSO; flags = BPF_F_ADJ_ROOM_FIXED_GSO | BPF_F_ADJ_ROOM_ENCAP_L3_IPV4;
olen = with_gre ? sizeof(h_outer) : sizeof(h_outer.ip); if (with_gre) {
flags |= BPF_F_ADJ_ROOM_ENCAP_L4_GRE;
olen = sizeof(h_outer);
} else {
olen = sizeof(h_outer.ip);
}
/* add room between mac and network header */ /* add room between mac and network header */
if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, flags)) if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, flags))
@ -119,8 +124,14 @@ static __always_inline int encap_ipv6(struct __sk_buff *skb, bool with_gre)
if (tcph.dest != __bpf_constant_htons(cfg_port)) if (tcph.dest != __bpf_constant_htons(cfg_port))
return TC_ACT_OK; return TC_ACT_OK;
flags = BPF_F_ADJ_ROOM_FIXED_GSO; flags = BPF_F_ADJ_ROOM_FIXED_GSO | BPF_F_ADJ_ROOM_ENCAP_L3_IPV6;
olen = with_gre ? sizeof(h_outer) : sizeof(h_outer.ip); if (with_gre) {
flags |= BPF_F_ADJ_ROOM_ENCAP_L4_GRE;
olen = sizeof(h_outer);
} else {
olen = sizeof(h_outer.ip);
}
/* add room between mac and network header */ /* add room between mac and network header */
if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, flags)) if (bpf_skb_adjust_room(skb, olen, BPF_ADJ_ROOM_MAC, flags))

10
tools/testing/selftests/bpf/test_tc_tunnel.sh
View File

@ -97,13 +97,11 @@ if [[ "$#" -eq "0" ]]; then
echo "ip6 gre" echo "ip6 gre"
$0 ipv6 ip6gre 100 $0 ipv6 ip6gre 100
# disabled until passes SKB_GSO_DODGY checks echo "ip gre gso"
# echo "ip gre gso" $0 ipv4 gre 2000
# $0 ipv4 gre 2000
# disabled until passes SKB_GSO_DODGY checks echo "ip6 gre gso"
# echo "ip6 gre gso" $0 ipv6 ip6gre 2000
# $0 ipv6 ip6gre 2000
echo "OK. All tests passed" echo "OK. All tests passed"
exit 0 exit 0