From patchwork Fri Oct 9 20:42:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Borkmann X-Patchwork-Id: 11829641 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7201C43467 for ; Fri, 9 Oct 2020 20:43:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD4FA22277 for ; Fri, 9 Oct 2020 20:43:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390785AbgJIUm6 (ORCPT ); Fri, 9 Oct 2020 16:42:58 -0400 Received: from www62.your-server.de ([213.133.104.62]:39494 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390511AbgJIUmx (ORCPT ); Fri, 9 Oct 2020 16:42:53 -0400 Received: from 75.57.196.178.dynamic.wline.res.cust.swisscom.ch ([178.196.57.75] helo=localhost) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1kQzE3-00085Q-8S; Fri, 09 Oct 2020 22:42:51 +0200 From: Daniel Borkmann To: ast@kernel.org Cc: daniel@iogearbox.net, john.fastabend@gmail.com, yhs@fb.com, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH bpf-next v3 6/6] bpf, selftests: add redirect_peer selftest Date: Fri, 9 Oct 2020 22:42:45 +0200 Message-Id: <20201009204245.27905-7-daniel@iogearbox.net> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20201009204245.27905-1-daniel@iogearbox.net> References: <20201009204245.27905-1-daniel@iogearbox.net> MIME-Version: 1.0 X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.102.4/25952/Fri Oct 9 15:52:40 2020) Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Extend the test_tc_redirect test and add a small test that exercises the new redirect_peer() helper for the IPv4 and IPv6 case. Signed-off-by: Daniel Borkmann --- .../selftests/bpf/progs/test_tc_peer.c | 45 +++++++++++++++++++ .../testing/selftests/bpf/test_tc_redirect.sh | 25 +++++++---- 2 files changed, 61 insertions(+), 9 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/test_tc_peer.c diff --git a/tools/testing/selftests/bpf/progs/test_tc_peer.c b/tools/testing/selftests/bpf/progs/test_tc_peer.c new file mode 100644 index 000000000000..fc84a7685aa2 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_tc_peer.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +#include +#include +#include + +#include + +enum { + dev_src, + dev_dst, +}; + +struct bpf_map_def SEC("maps") ifindex_map = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(int), + .max_entries = 2, +}; + +static __always_inline int get_dev_ifindex(int which) +{ + int *ifindex = bpf_map_lookup_elem(&ifindex_map, &which); + + return ifindex ? *ifindex : 0; +} + +SEC("chk_egress") int tc_chk(struct __sk_buff *skb) +{ + return TC_ACT_SHOT; +} + +SEC("dst_ingress") int tc_dst(struct __sk_buff *skb) +{ + return bpf_redirect_peer(get_dev_ifindex(dev_src), 0); +} + +SEC("src_ingress") int tc_src(struct __sk_buff *skb) +{ + return bpf_redirect_peer(get_dev_ifindex(dev_dst), 0); +} + +char __license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/test_tc_redirect.sh b/tools/testing/selftests/bpf/test_tc_redirect.sh index 6ad441405132..6d7482562140 100755 --- a/tools/testing/selftests/bpf/test_tc_redirect.sh +++ b/tools/testing/selftests/bpf/test_tc_redirect.sh @@ -4,9 +4,10 @@ # This test sets up 3 netns (src <-> fwd <-> dst). There is no direct veth link # between src and dst. The netns fwd has veth links to each src and dst. The # client is in src and server in dst. The test installs a TC BPF program to each -# host facing veth in fwd which calls into bpf_redirect_peer() to perform the -# neigh addr population and redirect; it also installs a dropper prog on the -# egress side to drop skbs if neigh addrs were not populated. +# host facing veth in fwd which calls into i) bpf_redirect_neigh() to perform the +# neigh addr population and redirect or ii) bpf_redirect_peer() for namespace +# switch from ingress side; it also installs a checker prog on the egress side +# to drop unexpected traffic. if [[ $EUID -ne 0 ]]; then echo "This script must be run as root" @@ -166,15 +167,17 @@ hex_mem_str() perl -e 'print join(" ", unpack("(H2)8", pack("L", @ARGV)))' $1 } -netns_setup_neigh() +netns_setup_bpf() { + local obj=$1 + ip netns exec ${NS_FWD} tc qdisc add dev veth_src_fwd clsact - ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd ingress bpf da obj test_tc_neigh.o sec src_ingress - ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd egress bpf da obj test_tc_neigh.o sec chk_egress + ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd ingress bpf da obj $obj sec src_ingress + ip netns exec ${NS_FWD} tc filter add dev veth_src_fwd egress bpf da obj $obj sec chk_egress ip netns exec ${NS_FWD} tc qdisc add dev veth_dst_fwd clsact - ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd ingress bpf da obj test_tc_neigh.o sec dst_ingress - ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd egress bpf da obj test_tc_neigh.o sec chk_egress + ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd ingress bpf da obj $obj sec dst_ingress + ip netns exec ${NS_FWD} tc filter add dev veth_dst_fwd egress bpf da obj $obj sec chk_egress veth_src=$(ip netns exec ${NS_FWD} cat /sys/class/net/veth_src_fwd/ifindex) veth_dst=$(ip netns exec ${NS_FWD} cat /sys/class/net/veth_dst_fwd/ifindex) @@ -193,5 +196,9 @@ trap netns_cleanup EXIT set -e netns_setup -netns_setup_neigh +netns_setup_bpf test_tc_neigh.o +netns_test_connectivity +netns_cleanup +netns_setup +netns_setup_bpf test_tc_peer.o netns_test_connectivity