1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# Copyright(c) 2020 Intel Corporation, Weqaar Janjua <weqaar.a.janjua@intel.com> 4 5# AF_XDP selftests based on veth 6# 7# End-to-end AF_XDP over Veth test 8# 9# Topology: 10# --------- 11# ----------- 12# _ | Process | _ 13# / ----------- \ 14# / | \ 15# / | \ 16# ----------- | ----------- 17# | Thread1 | | | Thread2 | 18# ----------- | ----------- 19# | | | 20# ----------- | ----------- 21# | xskX | | | xskY | 22# ----------- | ----------- 23# | | | 24# ----------- | ---------- 25# | vethX | --------- | vethY | 26# ----------- peer ---------- 27# 28# AF_XDP is an address family optimized for high performance packet processing, 29# it is XDP’s user-space interface. 30# 31# An AF_XDP socket is linked to a single UMEM which is a region of virtual 32# contiguous memory, divided into equal-sized frames. 33# 34# Refer to AF_XDP Kernel Documentation for detailed information: 35# https://www.kernel.org/doc/html/latest/networking/af_xdp.html 36# 37# Prerequisites setup by script: 38# 39# Set up veth interfaces as per the topology shown ^^: 40# * setup two veth interfaces 41# ** veth<xxxx> 42# ** veth<yyyy> 43# *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid 44# conflict with any existing interface 45# * tests the veth and xsk layers of the topology 46# 47# See the source xskxceiver.c for information on each test 48# 49# Kernel configuration: 50# --------------------- 51# See "config" file for recommended kernel config options. 52# 53# Turn on XDP sockets and veth support when compiling i.e. 54# Networking support --> 55# Networking options --> 56# [ * ] XDP sockets 57# 58# Executing Tests: 59# ---------------- 60# Must run with CAP_NET_ADMIN capability. 61# 62# Run: 63# sudo ./test_xsk.sh 64# 65# If running from kselftests: 66# sudo make run_tests 67# 68# Run with verbose output: 69# sudo ./test_xsk.sh -v 70# 71# Run and dump packet contents: 72# sudo ./test_xsk.sh -D 73# 74# Set up veth interfaces and leave them up so xskxceiver can be launched in a debugger: 75# sudo ./test_xsk.sh -d 76# 77# Run test suite for physical device in loopback mode 78# sudo ./test_xsk.sh -i IFACE 79 80. xsk_prereqs.sh 81 82ETH="" 83 84while getopts "vDi:d" flag 85do 86 case "${flag}" in 87 v) verbose=1;; 88 D) dump_pkts=1;; 89 d) debug=1;; 90 i) ETH=${OPTARG};; 91 esac 92done 93 94TEST_NAME="PREREQUISITES" 95 96URANDOM=/dev/urandom 97[ ! -e "${URANDOM}" ] && { echo "${URANDOM} not found. Skipping tests."; test_exit $ksft_fail; } 98 99VETH0_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4) 100VETH0=ve${VETH0_POSTFIX} 101VETH1_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4) 102VETH1=ve${VETH1_POSTFIX} 103MTU=1500 104 105trap ctrl_c INT 106 107function ctrl_c() { 108 cleanup_exit ${VETH0} ${VETH1} 109 exit 1 110} 111 112setup_vethPairs() { 113 if [[ $verbose -eq 1 ]]; then 114 echo "setting up ${VETH0}" 115 fi 116 ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4 117 if [ -f /proc/net/if_inet6 ]; then 118 echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6 119 echo 1 > /proc/sys/net/ipv6/conf/${VETH1}/disable_ipv6 120 fi 121 if [[ $verbose -eq 1 ]]; then 122 echo "setting up ${VETH1}" 123 fi 124 125 if [[ $busy_poll -eq 1 ]]; then 126 echo 2 > /sys/class/net/${VETH0}/napi_defer_hard_irqs 127 echo 200000 > /sys/class/net/${VETH0}/gro_flush_timeout 128 echo 2 > /sys/class/net/${VETH1}/napi_defer_hard_irqs 129 echo 200000 > /sys/class/net/${VETH1}/gro_flush_timeout 130 fi 131 132 ip link set ${VETH1} mtu ${MTU} 133 ip link set ${VETH0} mtu ${MTU} 134 ip link set ${VETH1} up 135 ip link set ${VETH0} up 136} 137 138if [ ! -z $ETH ]; then 139 VETH0=${ETH} 140 VETH1=${ETH} 141else 142 validate_root_exec 143 validate_veth_support ${VETH0} 144 validate_ip_utility 145 setup_vethPairs 146 147 retval=$? 148 if [ $retval -ne 0 ]; then 149 test_status $retval "${TEST_NAME}" 150 cleanup_exit ${VETH0} ${VETH1} 151 exit $retval 152 fi 153fi 154 155 156if [[ $verbose -eq 1 ]]; then 157 ARGS+="-v " 158fi 159 160if [[ $dump_pkts -eq 1 ]]; then 161 ARGS="-D " 162fi 163 164retval=$? 165test_status $retval "${TEST_NAME}" 166 167## START TESTS 168 169statusList=() 170 171TEST_NAME="XSK_SELFTESTS_${VETH0}_SOFTIRQ" 172 173if [[ $debug -eq 1 ]]; then 174 echo "-i" ${VETH0} "-i" ${VETH1} 175 exit 176fi 177 178exec_xskxceiver 179 180if [ -z $ETH ]; then 181 cleanup_exit ${VETH0} ${VETH1} 182fi 183TEST_NAME="XSK_SELFTESTS_${VETH0}_BUSY_POLL" 184busy_poll=1 185 186if [ -z $ETH ]; then 187 setup_vethPairs 188fi 189exec_xskxceiver 190 191## END TESTS 192 193if [ -z $ETH ]; then 194 cleanup_exit ${VETH0} ${VETH1} 195fi 196 197failures=0 198echo -e "\nSummary:" 199for i in "${!statusList[@]}" 200do 201 if [ ${statusList[$i]} -ne 0 ]; then 202 test_status ${statusList[$i]} ${nameList[$i]} 203 failures=1 204 fi 205done 206 207if [ $failures -eq 0 ]; then 208 echo "All tests successful!" 209fi 210