tools/testing/selftests/net/txtimestamp.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Send packets with transmit timestamps over loopback with netem
   5 # Verify that timestamps correspond to netem delay
   6
   7 set -e
   8
   9 setup() {
  10         # set 1ms delay on lo egress
  11         tc qdisc add dev lo root netem delay 1ms
  12
  13         # set 2ms delay on ifb0 egress
  14         modprobe ifb
  15         ip link add ifb_netem0 type ifb
  16         ip link set dev ifb_netem0 up
  17         tc qdisc add dev ifb_netem0 root netem delay 2ms
  18
  19         # redirect lo ingress through ifb0 egress
  20         tc qdisc add dev lo handle ffff: ingress
  21         tc filter add dev lo parent ffff: \
  22                 u32 match mark 0 0xffff \
  23                 action mirred egress redirect dev ifb_netem0
  24 }
  25
  26 run_test_v4v6() {
  27         # SND will be delayed 1000us
  28         # ACK will be delayed 6000us: 1 + 2 ms round-trip
  29         local -r args="$@ -v 1000 -V 6000"
  30
  31         ./txtimestamp ${args} -4 -L 127.0.0.1
  32         ./txtimestamp ${args} -6 -L ::1
  33 }
  34
  35 run_test_tcpudpraw() {
  36         local -r args=$@
  37
  38         run_test_v4v6 ${args}           # tcp
  39         run_test_v4v6 ${args} -u        # udp
  40         run_test_v4v6 ${args} -r        # raw
  41         run_test_v4v6 ${args} -R        # raw (IPPROTO_RAW)
  42         run_test_v4v6 ${args} -P        # pf_packet
  43 }
  44
  45 run_test_all() {
  46         setup
  47         run_test_tcpudpraw              # setsockopt
  48         run_test_tcpudpraw -C           # cmsg
  49         run_test_tcpudpraw -n           # timestamp w/o data
  50         echo "OK. All tests passed"
  51 }
  52
  53 run_test_one() {
  54         setup
  55         ./txtimestamp $@
  56 }
  57
  58 usage() {
  59         echo "Usage: $0 [ -r | --run ] <txtimestamp args> | [ -h | --help ]"
  60         echo "  (no args)  Run all tests"
  61         echo "  -r|--run  Run an individual test with arguments"
  62         echo "  -h|--help Help"
  63 }
  64
  65 main() {
  66         if [[ $# -eq 0 ]]; then
  67                 run_test_all
  68         else
  69                 if [[ "$1" = "-r" || "$1" == "--run" ]]; then
  70                         shift
  71                         run_test_one $@
  72                 else
  73                         usage
  74                 fi
  75         fi
  76 }
  77
  78 if [[ -z "$(ip netns identify)" ]]; then
  79         ./in_netns.sh $0 $@
  80 else
  81         main $@
  82 fi