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