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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright(c) 2020 Intel Corporation, Weqaar Janjua <weqaar.a.janjua@intel.com>
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# AF_XDP selftests based on veth
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#
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# End-to-end AF_XDP over Veth test
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#
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# Topology:
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# ---------
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# -----------
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# _ | Process | _
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# / ----------- \
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# / | \
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# / | \
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# ----------- | -----------
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# | Thread1 | | | Thread2 |
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# ----------- | -----------
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# | | |
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# ----------- | -----------
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# | xskX | | | xskY |
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# ----------- | -----------
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# | | |
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# ----------- | ----------
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# | vethX | --------- | vethY |
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# ----------- peer ----------
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# | | |
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# namespaceX | namespaceY
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#
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# AF_XDP is an address family optimized for high performance packet processing,
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# it is XDP’s user-space interface.
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#
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# An AF_XDP socket is linked to a single UMEM which is a region of virtual
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# contiguous memory, divided into equal-sized frames.
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#
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# Refer to AF_XDP Kernel Documentation for detailed information:
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# https://www.kernel.org/doc/html/latest/networking/af_xdp.html
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#
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# Prerequisites setup by script:
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#
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# Set up veth interfaces as per the topology shown ^^:
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# * setup two veth interfaces and one namespace
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# ** veth<xxxx> in root namespace
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# ** veth<yyyy> in af_xdp<xxxx> namespace
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# ** namespace af_xdp<xxxx>
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# *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid
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# conflict with any existing interface
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# * tests the veth and xsk layers of the topology
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#
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# See the source xskxceiver.c for information on each test
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#
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# Kernel configuration:
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# ---------------------
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# See "config" file for recommended kernel config options.
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#
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# Turn on XDP sockets and veth support when compiling i.e.
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# Networking support -->
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# Networking options -->
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# [ * ] XDP sockets
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#
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# Executing Tests:
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# ----------------
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# Must run with CAP_NET_ADMIN capability.
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#
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# Run:
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# sudo ./test_xsk.sh
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#
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# If running from kselftests:
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# sudo make run_tests
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#
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# Run with verbose output:
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# sudo ./test_xsk.sh -v
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#
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# Run and dump packet contents:
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# sudo ./test_xsk.sh -D
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#
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# Run test suite for physical device in loopback mode
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# sudo ./test_xsk.sh -i IFACE
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. xsk_prereqs.sh
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ETH=""
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while getopts "vDi:" flag
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do
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case "${flag}" in
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v) verbose=1;;
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D) dump_pkts=1;;
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i) ETH=${OPTARG};;
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esac
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done
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TEST_NAME="PREREQUISITES"
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URANDOM=/dev/urandom
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[ ! -e "${URANDOM}" ] && { echo "${URANDOM} not found. Skipping tests."; test_exit $ksft_fail; }
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VETH0_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4)
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VETH0=ve${VETH0_POSTFIX}
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VETH1_POSTFIX=$(cat ${URANDOM} | tr -dc '0-9' | fold -w 256 | head -n 1 | head --bytes 4)
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VETH1=ve${VETH1_POSTFIX}
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NS0=root
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NS1=af_xdp${VETH1_POSTFIX}
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MTU=1500
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trap ctrl_c INT
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function ctrl_c() {
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cleanup_exit ${VETH0} ${VETH1} ${NS1}
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exit 1
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}
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setup_vethPairs() {
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if [[ $verbose -eq 1 ]]; then
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echo "setting up ${VETH0}: namespace: ${NS0}"
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fi
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ip netns add ${NS1}
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ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4
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if [ -f /proc/net/if_inet6 ]; then
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echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
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echo 1 > /proc/sys/net/ipv6/conf/${VETH1}/disable_ipv6
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fi
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if [[ $verbose -eq 1 ]]; then
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echo "setting up ${VETH1}: namespace: ${NS1}"
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fi
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if [[ $busy_poll -eq 1 ]]; then
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echo 2 > /sys/class/net/${VETH0}/napi_defer_hard_irqs
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echo 200000 > /sys/class/net/${VETH0}/gro_flush_timeout
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echo 2 > /sys/class/net/${VETH1}/napi_defer_hard_irqs
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echo 200000 > /sys/class/net/${VETH1}/gro_flush_timeout
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fi
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ip link set ${VETH1} netns ${NS1}
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ip netns exec ${NS1} ip link set ${VETH1} mtu ${MTU}
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ip link set ${VETH0} mtu ${MTU}
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ip netns exec ${NS1} ip link set ${VETH1} up
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ip netns exec ${NS1} ip link set dev lo up
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ip link set ${VETH0} up
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}
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if [ ! -z $ETH ]; then
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VETH0=${ETH}
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VETH1=${ETH}
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NS1=""
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else
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validate_root_exec
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validate_veth_support ${VETH0}
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validate_ip_utility
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setup_vethPairs
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retval=$?
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if [ $retval -ne 0 ]; then
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test_status $retval "${TEST_NAME}"
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cleanup_exit ${VETH0} ${VETH1} ${NS1}
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exit $retval
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fi
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fi
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if [[ $verbose -eq 1 ]]; then
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ARGS+="-v "
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fi
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if [[ $dump_pkts -eq 1 ]]; then
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ARGS="-D "
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fi
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retval=$?
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test_status $retval "${TEST_NAME}"
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## START TESTS
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statusList=()
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TEST_NAME="XSK_SELFTESTS_${VETH0}_SOFTIRQ"
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exec_xskxceiver
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if [ -z $ETH ]; then
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cleanup_exit ${VETH0} ${VETH1} ${NS1}
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fi
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TEST_NAME="XSK_SELFTESTS_${VETH0}_BUSY_POLL"
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busy_poll=1
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if [ -z $ETH ]; then
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setup_vethPairs
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fi
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exec_xskxceiver
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## END TESTS
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if [ -z $ETH ]; then
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cleanup_exit ${VETH0} ${VETH1} ${NS1}
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fi
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failures=0
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echo -e "\nSummary:"
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for i in "${!statusList[@]}"
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do
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if [ ${statusList[$i]} -ne 0 ]; then
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test_status ${statusList[$i]} ${nameList[$i]}
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failures=1
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fi
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done
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if [ $failures -eq 0 ]; then
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echo "All tests successful!"
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fi
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