tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
7set -e
8
9setup() {
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
26run_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 ${args} -6 -L ::1
33}
34
35run_test_tcpudpraw() {
36 local -r args=$@
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
45run_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
53run_test_one() {
54 setup
55 ./txtimestamp $@
56}
57
58usage() {
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
65main() {
66 if [[ $# -eq 0 ]]; then
67 run_test_all
68 else
69 if [[ "$1" = "-r" || "$1" == "--run" ]]; then
70 shift
71 run_test_one $@
72 else
73 usage
74 fi
75 fi
76}
77
78if [[ "$(ip netns identify)" == "root" ]]; then
79 ./in_netns.sh $0 $@
80else
81 main $@
82fi