selftests/bpf/test_xdp_veth.sh

0001 #!/bin/sh
0002 # SPDX-License-Identifier: GPL-2.0
0003 #
0004 # Create 3 namespaces with 3 veth peers, and
0005 # forward packets in-between using native XDP
0006 #
0007 #                      XDP_TX
0008 # NS1(veth11)        NS2(veth22)        NS3(veth33)
0009 #      |                  |                  |
0010 #      |                  |                  |
0011 #   (veth1,            (veth2,            (veth3,
0012 #   id:111)            id:122)            id:133)
0013 #     ^ |                ^ |                ^ |
0014 #     | |  XDP_REDIRECT  | |  XDP_REDIRECT  | |
0015 #     | ------------------ ------------------ |
0016 #     -----------------------------------------
0017 #                    XDP_REDIRECT
0018
0019 # Kselftest framework requirement - SKIP code is 4.
0020 ksft_skip=4
0021
0022 TESTNAME=xdp_veth
0023 BPF_FS=$(awk '$3 == "bpf" {print $2; exit}' /proc/mounts)
0024 BPF_DIR=$BPF_FS/test_$TESTNAME
0025 readonly NS1="ns1-$(mktemp -u XXXXXX)"
0026 readonly NS2="ns2-$(mktemp -u XXXXXX)"
0027 readonly NS3="ns3-$(mktemp -u XXXXXX)"
0028
0029 _cleanup()
0030 {
0031         set +e
0032         ip link del veth1 2> /dev/null
0033         ip link del veth2 2> /dev/null
0034         ip link del veth3 2> /dev/null
0035         ip netns del ${NS1} 2> /dev/null
0036         ip netns del ${NS2} 2> /dev/null
0037         ip netns del ${NS3} 2> /dev/null
0038         rm -rf $BPF_DIR 2> /dev/null
0039 }
0040
0041 cleanup_skip()
0042 {
0043         echo "selftests: $TESTNAME [SKIP]"
0044         _cleanup
0045
0046         exit $ksft_skip
0047 }
0048
0049 cleanup()
0050 {
0051         if [ "$?" = 0 ]; then
0052                 echo "selftests: $TESTNAME [PASS]"
0053         else
0054                 echo "selftests: $TESTNAME [FAILED]"
0055         fi
0056         _cleanup
0057 }
0058
0059 if [ $(id -u) -ne 0 ]; then
0060         echo "selftests: $TESTNAME [SKIP] Need root privileges"
0061         exit $ksft_skip
0062 fi
0063
0064 if ! ip link set dev lo xdp off > /dev/null 2>&1; then
0065         echo "selftests: $TESTNAME [SKIP] Could not run test without the ip xdp support"
0066         exit $ksft_skip
0067 fi
0068
0069 if [ -z "$BPF_FS" ]; then
0070         echo "selftests: $TESTNAME [SKIP] Could not run test without bpffs mounted"
0071         exit $ksft_skip
0072 fi
0073
0074 if ! bpftool version > /dev/null 2>&1; then
0075         echo "selftests: $TESTNAME [SKIP] Could not run test without bpftool"
0076         exit $ksft_skip
0077 fi
0078
0079 set -e
0080
0081 trap cleanup_skip EXIT
0082
0083 ip netns add ${NS1}
0084 ip netns add ${NS2}
0085 ip netns add ${NS3}
0086
0087 ip link add veth1 index 111 type veth peer name veth11 netns ${NS1}
0088 ip link add veth2 index 122 type veth peer name veth22 netns ${NS2}
0089 ip link add veth3 index 133 type veth peer name veth33 netns ${NS3}
0090
0091 ip link set veth1 up
0092 ip link set veth2 up
0093 ip link set veth3 up
0094
0095 ip -n ${NS1} addr add 10.1.1.11/24 dev veth11
0096 ip -n ${NS3} addr add 10.1.1.33/24 dev veth33
0097
0098 ip -n ${NS1} link set dev veth11 up
0099 ip -n ${NS2} link set dev veth22 up
0100 ip -n ${NS3} link set dev veth33 up
0101
0102 mkdir $BPF_DIR
0103 bpftool prog loadall \
0104         xdp_redirect_map.o $BPF_DIR/progs type xdp \
0105         pinmaps $BPF_DIR/maps
0106 bpftool map update pinned $BPF_DIR/maps/tx_port key 0 0 0 0 value 122 0 0 0
0107 bpftool map update pinned $BPF_DIR/maps/tx_port key 1 0 0 0 value 133 0 0 0
0108 bpftool map update pinned $BPF_DIR/maps/tx_port key 2 0 0 0 value 111 0 0 0
0109 ip link set dev veth1 xdp pinned $BPF_DIR/progs/xdp_redirect_map_0
0110 ip link set dev veth2 xdp pinned $BPF_DIR/progs/xdp_redirect_map_1
0111 ip link set dev veth3 xdp pinned $BPF_DIR/progs/xdp_redirect_map_2
0112
0113 ip -n ${NS1} link set dev veth11 xdp obj xdp_dummy.o sec xdp
0114 ip -n ${NS2} link set dev veth22 xdp obj xdp_tx.o sec xdp
0115 ip -n ${NS3} link set dev veth33 xdp obj xdp_dummy.o sec xdp
0116
0117 trap cleanup EXIT
0118
0119 ip netns exec ${NS1} ping -c 1 -W 1 10.1.1.33
0120
0121 exit 0