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Message-ID: <cover.1673423199.git.william.xuanziyang@huawei.com>
Date: Wed, 11 Jan 2023 16:01:20 +0800
From: Ziyang Xuan <william.xuanziyang@...wei.com>
To: <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <willemb@...gle.com>, <bpf@...r.kernel.org>,
<netdev@...r.kernel.org>, <martin.lau@...ux.dev>,
<song@...nel.org>, <yhs@...com>, <john.fastabend@...il.com>,
<kpsingh@...nel.org>, <sdf@...gle.com>, <haoluo@...gle.com>,
<jolsa@...nel.org>
Subject: [PATCH bpf-next v2 0/2] bpf: Add ipip6 and ip6ip decap support for bpf_skb_adjust_room()
Add ipip6 and ip6ip decap support for bpf_skb_adjust_room().
Main use case is for using cls_bpf on ingress hook to decapsulate
IPv4 over IPv6 and IPv6 over IPv4 tunnel packets.
And add ipip6 and ip6ip decap testcases to verify that
bpf_skb_adjust_room() correctly decapsulate ipip6 and ip6ip
tunnel packets.
$./test_tc_tunnel.sh
ipip
encap 192.168.1.1 to 192.168.1.2, type ipip, mac none len 100
test basic connectivity
0
test bpf encap without decap (expect failure)
Ncat: TIMEOUT.
1
test bpf encap with tunnel device decap
0
test bpf encap with bpf decap
0
OK
ipip6
encap 192.168.1.1 to 192.168.1.2, type ipip6, mac none len 100
test basic connectivity
0
test bpf encap without decap (expect failure)
Ncat: TIMEOUT.
1
test bpf encap with tunnel device decap
0
test bpf encap with bpf decap
0
OK
ip6ip6
encap fd::1 to fd::2, type ip6tnl, mac none len 100
test basic connectivity
0
test bpf encap without decap (expect failure)
Ncat: TIMEOUT.
1
test bpf encap with tunnel device decap
0
test bpf encap with bpf decap
0
OK
sit
encap fd::1 to fd::2, type sit, mac none len 100
test basic connectivity
0
test bpf encap without decap (expect failure)
Ncat: TIMEOUT.
1
test bpf encap with tunnel device decap
0
test bpf encap with bpf decap
0
OK
...
OK. All tests passed
v2:
- Use decap flags to indicate the new IP header.
Do not rely on skb->encapsulation.
Ziyang Xuan (2):
bpf: Add ipip6 and ip6ip decap support for bpf_skb_adjust_room()
selftests/bpf: add ipip6 and ip6ip decap to test_tc_tunnel
include/uapi/linux/bpf.h | 8 ++
net/core/filter.c | 26 +++++-
tools/include/uapi/linux/bpf.h | 8 ++
.../selftests/bpf/progs/test_tc_tunnel.c | 91 ++++++++++++++++++-
tools/testing/selftests/bpf/test_tc_tunnel.sh | 15 +--
5 files changed, 139 insertions(+), 9 deletions(-)
--
2.25.1
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