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#!/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_$TESTNAME
readonly NS1="ns1-$(mktemp -u XXXXXX)"
readonly NS2="ns2-$(mktemp -u XXXXXX)"
readonly NS3="ns3-$(mktemp -u XXXXXX)"
_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.bpf.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/xdp_redirect_map_0
ip link set dev veth2 xdp pinned $BPF_DIR/progs/xdp_redirect_map_1
ip link set dev veth3 xdp pinned $BPF_DIR/progs/xdp_redirect_map_2
ip -n ${NS1} link set dev veth11 xdp obj xdp_dummy.bpf.o sec xdp
ip -n ${NS2} link set dev veth22 xdp obj xdp_tx.bpf.o sec xdp
ip -n ${NS3} link set dev veth33 xdp obj xdp_dummy.bpf.o sec xdp
trap cleanup EXIT
ip netns exec ${NS1} ping -c 1 -W 1 10.1.1.33
exit 0
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