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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | #!/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 |