101 lines
2.7 KiB
Bash
Executable File
101 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# This test installs a TC bpf program that throttles a TCP flow
|
|
# with dst port = 9000 down to 5MBps. Then it measures actual
|
|
# throughput of the flow.
|
|
|
|
BPF_FILE="test_tc_edt.bpf.o"
|
|
if [[ $EUID -ne 0 ]]; then
|
|
echo "This script must be run as root"
|
|
echo "FAIL"
|
|
exit 1
|
|
fi
|
|
|
|
# check that nc, dd, and timeout are present
|
|
command -v nc >/dev/null 2>&1 || \
|
|
{ echo >&2 "nc is not available"; exit 1; }
|
|
command -v dd >/dev/null 2>&1 || \
|
|
{ echo >&2 "nc is not available"; exit 1; }
|
|
command -v timeout >/dev/null 2>&1 || \
|
|
{ echo >&2 "timeout is not available"; exit 1; }
|
|
|
|
readonly NS_SRC="ns-src-$(mktemp -u XXXXXX)"
|
|
readonly NS_DST="ns-dst-$(mktemp -u XXXXXX)"
|
|
|
|
readonly IP_SRC="172.16.1.100"
|
|
readonly IP_DST="172.16.2.100"
|
|
|
|
cleanup()
|
|
{
|
|
ip netns del ${NS_SRC}
|
|
ip netns del ${NS_DST}
|
|
}
|
|
|
|
trap cleanup EXIT
|
|
|
|
set -e # exit on error
|
|
|
|
ip netns add "${NS_SRC}"
|
|
ip netns add "${NS_DST}"
|
|
ip link add veth_src type veth peer name veth_dst
|
|
ip link set veth_src netns ${NS_SRC}
|
|
ip link set veth_dst netns ${NS_DST}
|
|
|
|
ip -netns ${NS_SRC} addr add ${IP_SRC}/24 dev veth_src
|
|
ip -netns ${NS_DST} addr add ${IP_DST}/24 dev veth_dst
|
|
|
|
ip -netns ${NS_SRC} link set dev veth_src up
|
|
ip -netns ${NS_DST} link set dev veth_dst up
|
|
|
|
ip -netns ${NS_SRC} route add ${IP_DST}/32 dev veth_src
|
|
ip -netns ${NS_DST} route add ${IP_SRC}/32 dev veth_dst
|
|
|
|
# set up TC on TX
|
|
ip netns exec ${NS_SRC} tc qdisc add dev veth_src root fq
|
|
ip netns exec ${NS_SRC} tc qdisc add dev veth_src clsact
|
|
ip netns exec ${NS_SRC} tc filter add dev veth_src egress \
|
|
bpf da obj ${BPF_FILE} sec cls_test
|
|
|
|
|
|
# start the listener
|
|
ip netns exec ${NS_DST} bash -c \
|
|
"nc -4 -l -p 9000 >/dev/null &"
|
|
declare -i NC_PID=$!
|
|
sleep 1
|
|
|
|
declare -ir TIMEOUT=20
|
|
declare -ir EXPECTED_BPS=5000000
|
|
|
|
# run the load, capture RX bytes on DST
|
|
declare -ir RX_BYTES_START=$( ip netns exec ${NS_DST} \
|
|
cat /sys/class/net/veth_dst/statistics/rx_bytes )
|
|
|
|
set +e
|
|
ip netns exec ${NS_SRC} bash -c "timeout ${TIMEOUT} dd if=/dev/zero \
|
|
bs=1000 count=1000000 > /dev/tcp/${IP_DST}/9000 2>/dev/null"
|
|
set -e
|
|
|
|
declare -ir RX_BYTES_END=$( ip netns exec ${NS_DST} \
|
|
cat /sys/class/net/veth_dst/statistics/rx_bytes )
|
|
|
|
declare -ir ACTUAL_BPS=$(( ($RX_BYTES_END - $RX_BYTES_START) / $TIMEOUT ))
|
|
|
|
echo $TIMEOUT $ACTUAL_BPS $EXPECTED_BPS | \
|
|
awk '{printf "elapsed: %d sec; bps difference: %.2f%%\n",
|
|
$1, ($2-$3)*100.0/$3}'
|
|
|
|
# Pass the test if the actual bps is within 1% of the expected bps.
|
|
# The difference is usually about 0.1% on a 20-sec test, and ==> zero
|
|
# the longer the test runs.
|
|
declare -ir RES=$( echo $ACTUAL_BPS $EXPECTED_BPS | \
|
|
awk 'function abs(x){return ((x < 0.0) ? -x : x)}
|
|
{if (abs(($1-$2)*100.0/$2) > 1.0) { print "1" }
|
|
else { print "0"} }' )
|
|
if [ "${RES}" == "0" ] ; then
|
|
echo "PASS"
|
|
else
|
|
echo "FAIL"
|
|
exit 1
|
|
fi
|