name : test_xdp_veth.sh #!/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