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Commit 996139e8 authored by William Tu's avatar William Tu Committed by David S. Miller
Browse files

selftests: bpf: add a test for XDP redirect 



Add test for xdp_redirect by creating two namespaces with two
veth peers, then forward packets in-between.

Signed-off-by: default avatarWilliam Tu <u9012063@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: John Fastabend <john.fastabend@gmail.com>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ea6404c8

tools/include/uapi/linux/bpf.h

+2 −1
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/bpf/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/bpf/test_xdp_redirect.c

0 → 100644
+28 −0
Original line number Diff line number Diff line 
/* 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";

tools/testing/selftests/bpf/test_xdp_redirect.sh

0 → 100755
+54 −0
Original line number Diff line number Diff line 
#!/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