Commit 88091ff5 authored by Toshiaki Makita's avatar Toshiaki Makita Committed by Alexei Starovoitov
Browse files

selftests, bpf: Add test for veth native XDP 



Add a test case for veth native XDP. It checks if XDP_PASS, XDP_TX and
XDP_REDIRECT work properly.

  $ cd tools/testing/selftests/bpf
  $ make \
  	TEST_CUSTOM_PROGS= \
  	TEST_GEN_PROGS= \
  	TEST_GEN_PROGS_EXTENDED= \
  	TEST_PROGS_EXTENDED= \
  	TEST_PROGS="test_xdp_veth.sh" \
  	run_tests
  TAP version 13
  1..1
  # selftests: bpf: test_xdp_veth.sh
  # PING 10.1.1.33 (10.1.1.33) 56(84) bytes of data.
  # 64 bytes from 10.1.1.33: icmp_seq=1 ttl=64 time=0.073 ms
  #
  # --- 10.1.1.33 ping statistics ---
  # 1 packets transmitted, 1 received, 0% packet loss, time 0ms
  # rtt min/avg/max/mdev = 0.073/0.073/0.073/0.000 ms
  # selftests: xdp_veth [PASS]
  ok 1 selftests: bpf: test_xdp_veth.sh

Signed-off-by: default avatarToshiaki Makita <toshiaki.makita1@gmail.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 0bed6137

tools/testing/selftests/bpf/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ TEST_PROGS := test_kmod.sh \ 
	test_libbpf.sh \

	test_xdp_redirect.sh \

	test_xdp_meta.sh \

	test_xdp_veth.sh \

	test_offload.py \

	test_sock_addr.sh \

	test_tunnel.sh \

tools/testing/selftests/bpf/progs/xdp_redirect_map.c

0 → 100644
+31 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



#include <linux/bpf.h>

#include "bpf_helpers.h"



struct bpf_map_def SEC("maps") tx_port = {

	.type = BPF_MAP_TYPE_DEVMAP,

	.key_size = sizeof(int),

	.value_size = sizeof(int),

	.max_entries = 8,

};



SEC("redirect_map_0")

int xdp_redirect_map_0(struct xdp_md *xdp)

{

	return bpf_redirect_map(&tx_port, 0, 0);

}



SEC("redirect_map_1")

int xdp_redirect_map_1(struct xdp_md *xdp)

{

	return bpf_redirect_map(&tx_port, 1, 0);

}



SEC("redirect_map_2")

int xdp_redirect_map_2(struct xdp_md *xdp)

{

	return bpf_redirect_map(&tx_port, 2, 0);

}



char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/progs/xdp_tx.c

0 → 100644
+12 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0



#include <linux/bpf.h>

#include "bpf_helpers.h"



SEC("tx")

int xdp_tx(struct xdp_md *xdp)

{

	return XDP_TX;

}



char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/test_xdp_veth.sh

0 → 100755
+118 −0
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0

#

# Create 3 namespaces with 3 veth peers, and

# forward packets in-between using native XDP

#

#                      XDP_TX

# NS1(veth11)        NS2(veth22)        NS3(veth33)

#      |                  |                  |

#      |                  |                  |

#   (veth1,            (veth2,            (veth3,

#   id:111)            id:122)            id:133)

#     ^ |                ^ |                ^ |

#     | |  XDP_REDIRECT  | |  XDP_REDIRECT  | |

#     | ------------------ ------------------ |

#     -----------------------------------------

#                    XDP_REDIRECT



# Kselftest framework requirement - SKIP code is 4.

ksft_skip=4



TESTNAME=xdp_veth

BPF_FS=$(awk '$3 == "bpf" {print $2; exit}' /proc/mounts)

BPF_DIR=$BPF_FS/test_$TESTNAME



_cleanup()

{

	set +e

	ip link del veth1 2> /dev/null

	ip link del veth2 2> /dev/null

	ip link del veth3 2> /dev/null

	ip netns del ns1 2> /dev/null

	ip netns del ns2 2> /dev/null

	ip netns del ns3 2> /dev/null

	rm -rf $BPF_DIR 2> /dev/null

}



cleanup_skip()

{

	echo "selftests: $TESTNAME [SKIP]"

	_cleanup



	exit $ksft_skip

}



cleanup()

{

	if [ "$?" = 0 ]; then

		echo "selftests: $TESTNAME [PASS]"

	else

		echo "selftests: $TESTNAME [FAILED]"

	fi

	_cleanup

}



if [ $(id -u) -ne 0 ]; then

	echo "selftests: $TESTNAME [SKIP] Need root privileges"

	exit $ksft_skip

fi



if ! ip link set dev lo xdp off > /dev/null 2>&1; then

	echo "selftests: $TESTNAME [SKIP] Could not run test without the ip xdp support"

	exit $ksft_skip

fi



if [ -z "$BPF_FS" ]; then

	echo "selftests: $TESTNAME [SKIP] Could not run test without bpffs mounted"

	exit $ksft_skip

fi



if ! bpftool version > /dev/null 2>&1; then

	echo "selftests: $TESTNAME [SKIP] Could not run test without bpftool"

	exit $ksft_skip

fi



set -e



trap cleanup_skip EXIT



ip netns add ns1

ip netns add ns2

ip netns add ns3



ip link add veth1 index 111 type veth peer name veth11 netns ns1

ip link add veth2 index 122 type veth peer name veth22 netns ns2

ip link add veth3 index 133 type veth peer name veth33 netns ns3



ip link set veth1 up

ip link set veth2 up

ip link set veth3 up



ip -n ns1 addr add 10.1.1.11/24 dev veth11

ip -n ns3 addr add 10.1.1.33/24 dev veth33



ip -n ns1 link set dev veth11 up

ip -n ns2 link set dev veth22 up

ip -n ns3 link set dev veth33 up



mkdir $BPF_DIR

bpftool prog loadall \

	xdp_redirect_map.o $BPF_DIR/progs type xdp \

	pinmaps $BPF_DIR/maps

bpftool map update pinned $BPF_DIR/maps/tx_port key 0 0 0 0 value 122 0 0 0

bpftool map update pinned $BPF_DIR/maps/tx_port key 1 0 0 0 value 133 0 0 0

bpftool map update pinned $BPF_DIR/maps/tx_port key 2 0 0 0 value 111 0 0 0

ip link set dev veth1 xdp pinned $BPF_DIR/progs/redirect_map_0

ip link set dev veth2 xdp pinned $BPF_DIR/progs/redirect_map_1

ip link set dev veth3 xdp pinned $BPF_DIR/progs/redirect_map_2



ip -n ns1 link set dev veth11 xdp obj xdp_dummy.o sec xdp_dummy

ip -n ns2 link set dev veth22 xdp obj xdp_tx.o sec tx

ip -n ns3 link set dev veth33 xdp obj xdp_dummy.o sec xdp_dummy



trap cleanup EXIT



ip netns exec ns1 ping -c 1 -W 1 10.1.1.33



exit 0

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