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# * create a spec file veth.spec that includes this run-time configuration 47# *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid 48# conflict with any existing interface 49# * tests the veth and xsk layers of the topology 50# 51# See the source xdpxceiver.c for information on each test 52# 53# Kernel configuration: 54# --------------------- 55# See "config" file for recommended kernel config options. 56# 57# Turn on XDP sockets and veth support when compiling i.e. 58# Networking support --> 59# Networking options --> 60# [ * ] XDP sockets 61# 62# Executing Tests: 63# ---------------- 64# Must run with CAP_NET_ADMIN capability. 65# 66# Run (full color-coded output): 67# sudo ./test_xsk.sh -c 68# 69# If running from kselftests: 70# sudo make colorconsole=1 run_tests 71# 72# Run (full output without color-coding): 73# sudo ./test_xsk.sh 74 75. xsk_prereqs.sh 76 77while getopts c flag 78do 79 case "${flag}" in 80 c) colorconsole=1;; 81 esac 82done 83 84TEST_NAME="PREREQUISITES" 85 86URANDOM=/dev/urandom 87[ ! -e "${URANDOM}" ] && { echo "${URANDOM} not found. Skipping tests."; test_exit 1 1; } 88 89VETH0_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4) 90VETH0=ve${VETH0_POSTFIX} 91VETH1_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4) 92VETH1=ve${VETH1_POSTFIX} 93NS0=root 94NS1=af_xdp${VETH1_POSTFIX} 95MTU=1500 96 97setup_vethPairs() { 98 echo "setting up ${VETH0}: namespace: ${NS0}" 99 ip netns add ${NS1} 100 ip link add ${VETH0} type veth peer name ${VETH1} 101 if [ -f /proc/net/if_inet6 ]; then 102 echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6 103 fi 104 echo "setting up ${VETH1}: namespace: ${NS1}" 105 ip link set ${VETH1} netns ${NS1} 106 ip netns exec ${NS1} ip link set ${VETH1} mtu ${MTU} 107 ip link set ${VETH0} mtu ${MTU} 108 ip netns exec ${NS1} ip link set ${VETH1} up 109 ip link set ${VETH0} up 110} 111 112validate_root_exec 113validate_veth_support ${VETH0} 114validate_ip_utility 115setup_vethPairs 116 117retval=$? 118if [ $retval -ne 0 ]; then 119 test_status $retval "${TEST_NAME}" 120 cleanup_exit ${VETH0} ${VETH1} ${NS1} 121 exit $retval 122fi 123 124echo "${VETH0}:${VETH1},${NS1}" > ${SPECFILE} 125 126validate_veth_spec_file 127 128echo "Spec file created: ${SPECFILE}" 129 130test_status $retval "${TEST_NAME}" 131 132## START TESTS 133 134statusList=() 135 136### TEST 1 137TEST_NAME="XSK KSELFTEST FRAMEWORK" 138 139echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Generic mode" 140vethXDPgeneric ${VETH0} ${VETH1} ${NS1} 141 142retval=$? 143if [ $retval -eq 0 ]; then 144 echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Native mode" 145 vethXDPnative ${VETH0} ${VETH1} ${NS1} 146fi 147 148retval=$? 149test_status $retval "${TEST_NAME}" 150statusList+=($retval) 151 152### TEST 2 153TEST_NAME="SKB NOPOLL" 154 155vethXDPgeneric ${VETH0} ${VETH1} ${NS1} 156 157params=("-S") 158execxdpxceiver params 159 160retval=$? 161test_status $retval "${TEST_NAME}" 162statusList+=($retval) 163 164### TEST 3 165TEST_NAME="SKB POLL" 166 167vethXDPgeneric ${VETH0} ${VETH1} ${NS1} 168 169params=("-S" "-p") 170execxdpxceiver params 171 172retval=$? 173test_status $retval "${TEST_NAME}" 174statusList+=($retval) 175 176## END TESTS 177 178cleanup_exit ${VETH0} ${VETH1} ${NS1} 179 180for _status in "${statusList[@]}" 181do 182 if [ $_status -ne 0 ]; then 183 test_exit $ksft_fail 0 184 fi 185done 186 187test_exit $ksft_pass 0 188