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: William Tu <u9012063@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
William Tu 2017-08-07 13:14:42 -07:00 committed by David S. Miller
parent ea6404c841
commit 996139e801
4 changed files with 86 additions and 3 deletions

View File

@ -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

View File

@ -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

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@ -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";

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@ -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