tools/testing/selftests/bpf/test_xdp_veth.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Create 3 namespaces with 3 veth peers, and
   5 # forward packets in-between using native XDP
   6 #
   7 #                      XDP_TX
   8 # NS1(veth11)        NS2(veth22)        NS3(veth33)
   9 #      |                  |                  |
  10 #      |                  |                  |
  11 #   (veth1,            (veth2,            (veth3,
  12 #   id:111)            id:122)            id:133)
  13 #     ^ |                ^ |                ^ |
  14 #     | |  XDP_REDIRECT  | |  XDP_REDIRECT  | |
  15 #     | ------------------ ------------------ |
  16 #     -----------------------------------------
  17 #                    XDP_REDIRECT
  18
  19 # Kselftest framework requirement - SKIP code is 4.
  20 ksft_skip=4
  21
  22 TESTNAME=xdp_veth
  23 BPF_FS=$(awk '$3 == "bpf" {print $2; exit}' /proc/mounts)
  24 BPF_DIR=$BPF_FS/test_$TESTNAME
  25
  26 _cleanup()
  27 {
  28         set +e
  29         ip link del veth1 2> /dev/null
  30         ip link del veth2 2> /dev/null
  31         ip link del veth3 2> /dev/null
  32         ip netns del ns1 2> /dev/null
  33         ip netns del ns2 2> /dev/null
  34         ip netns del ns3 2> /dev/null
  35         rm -rf $BPF_DIR 2> /dev/null
  36 }
  37
  38 cleanup_skip()
  39 {
  40         echo "selftests: $TESTNAME [SKIP]"
  41         _cleanup
  42
  43         exit $ksft_skip
  44 }
  45
  46 cleanup()
  47 {
  48         if [ "$?" = 0 ]; then
  49                 echo "selftests: $TESTNAME [PASS]"
  50         else
  51                 echo "selftests: $TESTNAME [FAILED]"
  52         fi
  53         _cleanup
  54 }
  55
  56 if [ $(id -u) -ne 0 ]; then
  57         echo "selftests: $TESTNAME [SKIP] Need root privileges"
  58         exit $ksft_skip
  59 fi
  60
  61 if ! ip link set dev lo xdp off > /dev/null 2>&1; then
  62         echo "selftests: $TESTNAME [SKIP] Could not run test without the ip xdp support"
  63         exit $ksft_skip
  64 fi
  65
  66 if [ -z "$BPF_FS" ]; then
  67         echo "selftests: $TESTNAME [SKIP] Could not run test without bpffs mounted"
  68         exit $ksft_skip
  69 fi
  70
  71 if ! bpftool version > /dev/null 2>&1; then
  72         echo "selftests: $TESTNAME [SKIP] Could not run test without bpftool"
  73         exit $ksft_skip
  74 fi
  75
  76 set -e
  77
  78 trap cleanup_skip EXIT
  79
  80 ip netns add ns1
  81 ip netns add ns2
  82 ip netns add ns3
  83
  84 ip link add veth1 index 111 type veth peer name veth11 netns ns1
  85 ip link add veth2 index 122 type veth peer name veth22 netns ns2
  86 ip link add veth3 index 133 type veth peer name veth33 netns ns3
  87
  88 ip link set veth1 up
  89 ip link set veth2 up
  90 ip link set veth3 up
  91
  92 ip -n ns1 addr add 10.1.1.11/24 dev veth11
  93 ip -n ns3 addr add 10.1.1.33/24 dev veth33
  94
  95 ip -n ns1 link set dev veth11 up
  96 ip -n ns2 link set dev veth22 up
  97 ip -n ns3 link set dev veth33 up
  98
  99 mkdir $BPF_DIR
 100 bpftool prog loadall \
 101         xdp_redirect_map.o $BPF_DIR/progs type xdp \
 102         pinmaps $BPF_DIR/maps
 103 bpftool map update pinned $BPF_DIR/maps/tx_port key 0 0 0 0 value 122 0 0 0
 104 bpftool map update pinned $BPF_DIR/maps/tx_port key 1 0 0 0 value 133 0 0 0
 105 bpftool map update pinned $BPF_DIR/maps/tx_port key 2 0 0 0 value 111 0 0 0
 106 ip link set dev veth1 xdp pinned $BPF_DIR/progs/redirect_map_0
 107 ip link set dev veth2 xdp pinned $BPF_DIR/progs/redirect_map_1
 108 ip link set dev veth3 xdp pinned $BPF_DIR/progs/redirect_map_2
 109
 110 ip -n ns1 link set dev veth11 xdp obj xdp_dummy.o sec xdp_dummy
 111 ip -n ns2 link set dev veth22 xdp obj xdp_tx.o sec tx
 112 ip -n ns3 link set dev veth33 xdp obj xdp_dummy.o sec xdp_dummy
 113
 114 trap cleanup EXIT
 115
 116 ip netns exec ns1 ping -c 1 -W 1 10.1.1.33
 117
 118 exit 0