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# namespaceX | namespaceY 29# 30# AF_XDP is an address family optimized for high performance packet processing, 31# it is XDP’s user-space interface. 32# 33# An AF_XDP socket is linked to a single UMEM which is a region of virtual 34# contiguous memory, divided into equal-sized frames. 35# 36# Refer to AF_XDP Kernel Documentation for detailed information: 37# https://www.kernel.org/doc/html/latest/networking/af_xdp.html 38# 39# Prerequisites setup by script: 40# 41# Set up veth interfaces as per the topology shown ^^: 42# * setup two veth interfaces and one namespace 43# ** veth<xxxx> in root namespace 44# ** veth<yyyy> in af_xdp<xxxx> namespace 45# ** namespace af_xdp<xxxx> 46# *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid 47# conflict with any existing interface 48# * tests the veth and xsk layers of the topology 49# 50# See the source xdpxceiver.c for information on each test 51# 52# Kernel configuration: 53# --------------------- 54# See "config" file for recommended kernel config options. 55# 56# Turn on XDP sockets and veth support when compiling i.e. 57# Networking support --> 58# Networking options --> 59# [ * ] XDP sockets 60# 61# Executing Tests: 62# ---------------- 63# Must run with CAP_NET_ADMIN capability. 64# 65# Run: 66# sudo ./test_xsk.sh 67# 68# If running from kselftests: 69# sudo make run_tests 70# 71# Run with verbose output: 72# sudo ./test_xsk.sh -v 73# 74# Run and dump packet contents: 75# sudo ./test_xsk.sh -D 76 77. xsk_prereqs.sh 78 79while getopts "vD" flag 80do 81 case "${flag}" in 82 v) verbose=1;; 83 D) dump_pkts=1;; 84 esac 85done 86 87TEST_NAME="PREREQUISITES" 88 89URANDOM=/dev/urandom 90[ ! -e "${URANDOM}" ] && { echo "${URANDOM} not found. Skipping tests."; test_exit $ksft_fail; } 91 92VETH0_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4) 93VETH0=ve${VETH0_POSTFIX} 94VETH1_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4) 95VETH1=ve${VETH1_POSTFIX} 96NS0=root 97NS1=af_xdp${VETH1_POSTFIX} 98MTU=1500 99 100trap ctrl_c INT 101 102function ctrl_c() { 103 cleanup_exit ${VETH0} ${VETH1} ${NS1} 104 exit 1 105} 106 107setup_vethPairs() { 108 if [[ $verbose -eq 1 ]]; then 109 echo "setting up ${VETH0}: namespace: ${NS0}" 110 fi 111 ip netns add ${NS1} 112 ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4 113 if [ -f /proc/net/if_inet6 ]; then 114 echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6 115 fi 116 if [[ $verbose -eq 1 ]]; then 117 echo "setting up ${VETH1}: namespace: ${NS1}" 118 fi 119 120 if [[ $busy_poll -eq 1 ]]; then 121 echo 2 > /sys/class/net/${VETH0}/napi_defer_hard_irqs 122 echo 200000 > /sys/class/net/${VETH0}/gro_flush_timeout 123 echo 2 > /sys/class/net/${VETH1}/napi_defer_hard_irqs 124 echo 200000 > /sys/class/net/${VETH1}/gro_flush_timeout 125 fi 126 127 ip link set ${VETH1} netns ${NS1} 128 ip netns exec ${NS1} ip link set ${VETH1} mtu ${MTU} 129 ip link set ${VETH0} mtu ${MTU} 130 ip netns exec ${NS1} ip link set ${VETH1} up 131 ip netns exec ${NS1} ip link set dev lo up 132 ip link set ${VETH0} up 133} 134 135validate_root_exec 136validate_veth_support ${VETH0} 137validate_ip_utility 138setup_vethPairs 139 140retval=$? 141if [ $retval -ne 0 ]; then 142 test_status $retval "${TEST_NAME}" 143 cleanup_exit ${VETH0} ${VETH1} ${NS1} 144 exit $retval 145fi 146 147if [[ $verbose -eq 1 ]]; then 148 ARGS+="-v " 149fi 150 151if [[ $dump_pkts -eq 1 ]]; then 152 ARGS="-D " 153fi 154 155test_status $retval "${TEST_NAME}" 156 157## START TESTS 158 159statusList=() 160 161TEST_NAME="XSK_SELFTESTS_SOFTIRQ" 162 163execxdpxceiver 164 165cleanup_exit ${VETH0} ${VETH1} ${NS1} 166TEST_NAME="XSK_SELFTESTS_BUSY_POLL" 167busy_poll=1 168 169setup_vethPairs 170execxdpxceiver 171 172## END TESTS 173 174cleanup_exit ${VETH0} ${VETH1} ${NS1} 175 176failures=0 177echo -e "\nSummary:" 178for i in "${!statusList[@]}" 179do 180 if [ ${statusList[$i]} -ne 0 ]; then 181 test_status ${statusList[$i]} ${nameList[$i]} 182 failures=1 183 fi 184done 185 186if [ $failures -eq 0 ]; then 187 echo "All tests successful!" 188fi 189