Quellcode-Bibliothek drop_monitor_tests.sh   Sprache: Shell

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# This test is for checking drop monitor functionality.
source lib.sh
ret=0

# all tests in this script. Can be overridden with -t option
TESTS="
 sw_drops
 hw_drops
"

NETDEVSIM_PATH=/sys/bus/netdevsim/
DEV_ADDR=1337
DEV=netdevsim${DEV_ADDR}
DEVLINK_DEV=netdevsim/${DEV}

log_test()
{
 local rc=$1
 local expected=$2
 local msg="$3"

 if [ ${rc} -eq ${expected} ]; then
  printf " TEST: %-60s [ OK ]\n" "${msg}"
  nsuccess=$((nsuccess+1))
 else
  ret=1
  nfail=$((nfail+1))
  printf " TEST: %-60s [FAIL]\n" "${msg}"
 fi
}

setup()
{
 modprobe netdevsim &> /dev/null

 set -e
 setup_ns NS1
 $IP link add dummy10 up type dummy

 $NS_EXEC echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
 udevadm settle
 local netdev=$($NS_EXEC ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
 $IP link set dev $netdev up

 set +e
}

cleanup()
{
 $NS_EXEC echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
 cleanup_ns ${NS1}
}

sw_drops_test()
{
 echo
 echo "Software drops test"

 setup

 local dir=$(mktemp -d)

 $TC qdisc add dev dummy10 clsact
 $TC filter add dev dummy10 egress pref 1 handle 101 proto ip \
  flower dst_ip 192.0.2.10 action drop

 $NS_EXEC mausezahn dummy10 -a 00:11:22:33:44:55 -b 00:aa:bb:cc:dd:ee \
  -A 192.0.2.1 -B 192.0.2.10 -t udp sp=12345,dp=54321 -c 0 -q \
  -d 100msec &
 timeout 5 dwdump -o sw -w ${dir}/packets.pcap
 (( $(tshark -r ${dir}/packets.pcap \
  -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) != 0))
 log_test $? 0 "Capturing active software drops"

 rm ${dir}/packets.pcap

 kill_process %%
 timeout 5 dwdump -o sw -w ${dir}/packets.pcap
 (( $(tshark -r ${dir}/packets.pcap \
  -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0))
 log_test $? 0 "Capturing inactive software drops"

 rm -r $dir

 cleanup
}

hw_drops_test()
{
 echo
 echo "Hardware drops test"

 setup

 local dir=$(mktemp -d)

 $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action trap
 timeout 5 dwdump -o hw -w ${dir}/packets.pcap
 (( $(tshark -r ${dir}/packets.pcap \
  -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
  | wc -l) != 0))
 log_test $? 0 "Capturing active hardware drops"

 rm ${dir}/packets.pcap

 $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action drop
 timeout 5 dwdump -o hw -w ${dir}/packets.pcap
 (( $(tshark -r ${dir}/packets.pcap \
  -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
  | wc -l) == 0))
 log_test $? 0 "Capturing inactive hardware drops"

 rm -r $dir

 cleanup
}

################################################################################
# usage

usage()
{
 cat <<EOF
usage: ${0##*/} OPTS

        -t <test>   Test(s) to run (default: all)
                    (options: $TESTS)
EOF
}

################################################################################
# main

while getopts ":t:h" opt; do
 case $opt in
  t) TESTS=$OPTARG;;
  h) usage; exit 0;;
  *) usage; exit 1;;
 esac
done

if [ "$(id -u)" -ne 0 ];then
 echo "SKIP: Need root privileges"
 exit $ksft_skip;
fi

if [ ! -x "$(command -v ip)" ]; then
 echo "SKIP: Could not run test without ip tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v devlink)" ]; then
 echo "SKIP: Could not run test without devlink tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v tshark)" ]; then
 echo "SKIP: Could not run test without tshark tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v dwdump)" ]; then
 echo "SKIP: Could not run test without dwdump tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v udevadm)" ]; then
 echo "SKIP: Could not run test without udevadm tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v timeout)" ]; then
 echo "SKIP: Could not run test without timeout tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v mausezahn)" ]; then
 echo "SKIP: Could not run test without mausezahn tool"
 exit $ksft_skip
fi

tshark -G fields 2> /dev/null | grep -q net_dm
if [ $? -ne 0 ]; then
 echo "SKIP: tshark too old, missing net_dm dissector"
 exit $ksft_skip
fi

# create netns first so we can get the namespace name
setup_ns NS1
cleanup &> /dev/null
trap cleanup EXIT

IP="ip -netns ${NS1}"
TC="tc -netns ${NS1}"
DEVLINK="devlink -N ${NS1}"
NS_EXEC="ip netns exec ${NS1}"

for t in $TESTS
do
 case $t in
 sw_drops|sw)   sw_drops_test;;
 hw_drops|hw)   hw_drops_test;;

 help) echo "Test names: $TESTS"; exit 0;;
 esac
done

if [ "$TESTS" != "none" ]; then
 printf "\nTests passed: %3d\n" ${nsuccess}
 printf "Tests failed: %3d\n"   ${nfail}
fi

exit $ret