[PATCH net-next] selftests: bpf: add a test for XDP redirect
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STALE3359d
From: William Tu <hidden>
Date: 2017-08-07 20:15:08
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [selftests] (test runners & infrastructure), kernel selftest framework, the rest, xdp (express data path) · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Shuah Khan, Shuah Khan, Linus Torvalds, David S. Miller, Jakub Kicinski, Jesper Dangaard Brouer, John Fastabend
Add test for xdp_redirect by creating two namespaces with two veth peers, then forward packets in-between. Signed-off-by: William Tu <redacted> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> --- tools/include/uapi/linux/bpf.h | 3 +- tools/testing/selftests/bpf/Makefile | 4 +- tools/testing/selftests/bpf/test_xdp_redirect.c | 28 ++++++++++++ tools/testing/selftests/bpf/test_xdp_redirect.sh | 54 ++++++++++++++++++++++++ 4 files changed, 86 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/bpf/test_xdp_redirect.c create mode 100755 tools/testing/selftests/bpf/test_xdp_redirect.sh
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 1579cab49717..8d9bfcca3fe4 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h@@ -592,7 +592,8 @@ union bpf_attr { FN(get_socket_uid), \ FN(set_hash), \ FN(setsockopt), \ - FN(skb_adjust_room), + FN(skb_adjust_room), \ + FN(redirect_map), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 153c3a181a4c..3c2e67da4b41 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile@@ -15,9 +15,9 @@ TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test test_align TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \ - test_pkt_md_access.o + test_pkt_md_access.o test_xdp_redirect.o -TEST_PROGS := test_kmod.sh +TEST_PROGS := test_kmod.sh test_xdp_redirect.sh include ../lib.mk
diff --git a/tools/testing/selftests/bpf/test_xdp_redirect.c b/tools/testing/selftests/bpf/test_xdp_redirect.c
new file mode 100644
index 000000000000..ef9e704be140
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_xdp_redirect.c@@ -0,0 +1,28 @@ +/* Copyright (c) 2017 VMware + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/bpf.h> +#include "bpf_helpers.h" + +int _version SEC("version") = 1; + +SEC("redirect_to_111") +int xdp_redirect_to_111(struct xdp_md *xdp) +{ + return bpf_redirect(111, 0); +} +SEC("redirect_to_222") +int xdp_redirect_to_222(struct xdp_md *xdp) +{ + return bpf_redirect(222, 0); +} + +char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/test_xdp_redirect.sh b/tools/testing/selftests/bpf/test_xdp_redirect.sh
new file mode 100755
index 000000000000..d8c73ed6e040
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_xdp_redirect.sh@@ -0,0 +1,54 @@ +#!/bin/sh +# Create 2 namespaces with two veth peers, and +# forward packets in-between using generic XDP +# +# NS1(veth11) NS2(veth22) +# | | +# | | +# (veth1, ------ (veth2, +# id:111) id:222) +# | xdp forwarding | +# ------------------ + +cleanup() +{ + if [ "$?" = "0" ]; then + echo "selftests: test_xdp_redirect [PASS]"; + else + echo "selftests: test_xdp_redirect [FAILED]"; + fi + + set +e + ip netns del ns1 2> /dev/null + ip netns del ns2 2> /dev/null +} + +set -e + +ip netns add ns1 +ip netns add ns2 + +trap cleanup 0 2 3 6 9 + +ip link add veth1 index 111 type veth peer name veth11 +ip link add veth2 index 222 type veth peer name veth22 + +ip link set veth11 netns ns1 +ip link set veth22 netns ns2 + +ip link set veth1 up +ip link set veth2 up + +ip netns exec ns1 ip addr add 10.1.1.11/24 dev veth11 +ip netns exec ns2 ip addr add 10.1.1.22/24 dev veth22 + +ip netns exec ns1 ip link set dev veth11 up +ip netns exec ns2 ip link set dev veth22 up + +ip link set dev veth1 xdpgeneric obj test_xdp_redirect.o sec redirect_to_222 +ip link set dev veth2 xdpgeneric obj test_xdp_redirect.o sec redirect_to_111 + +ip netns exec ns1 ping -c 1 10.1.1.22 +ip netns exec ns2 ping -c 1 10.1.1.11 + +exit 0
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2.7.4