selftests/bpf: Xsk selftests framework
This patch adds AF_XDP selftests framework under selftests/bpf.
Topology:
---------
----------- -----------
| xskX | --------- | xskY |
----------- | -----------
| | |
----------- | ----------
| vethX | --------- | vethY |
----------- peer ----------
| | |
namespaceX | namespaceY
Prerequisites setup by script test_xsk.sh:
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
Signed-off-by: Weqaar Janjua <weqaar.a.janjua@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Yonghong Song <yhs@fb.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20201207215333.11586-2-weqaar.a.janjua@intel.com
This commit is contained in:
Weqaar Janjua
Daniel Borkmann
parent
b60da4955f
commit
a89052572e
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@ -46,7 +46,8 @@ endif
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TEST_GEN_FILES =
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TEST_FILES = test_lwt_ip_encap.o \
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test_tc_edt.o
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test_tc_edt.o \
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xsk_prereqs.sh
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# Order correspond to 'make run_tests' order
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TEST_PROGS := test_kmod.sh \
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@ -70,6 +71,7 @@ TEST_PROGS := test_kmod.sh \
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test_bpftool_build.sh \
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test_bpftool.sh \
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test_bpftool_metadata.sh \
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test_xsk.sh
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TEST_PROGS_EXTENDED := with_addr.sh \
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with_tunnels.sh \
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@ -0,0 +1,152 @@
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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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# | 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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# * create a spec file veth.spec that includes this run-time configuration
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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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# 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 (full color-coded output):
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# sudo ./test_xsk.sh -c
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#
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# If running from kselftests:
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# sudo make colorconsole=1 run_tests
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#
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# Run (full output without color-coding):
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# sudo ./test_xsk.sh
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. xsk_prereqs.sh
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while getopts c flag
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do
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case "${flag}" in
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c) colorconsole=1;;
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esac
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done
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TEST_NAME="PREREQUISITES"
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URANDOM=/dev/urandom
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[ ! -e "${URANDOM}" ] && { echo "${URANDOM} not found. Skipping tests."; test_exit 1 1; }
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VETH0_POSTFIX=$(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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setup_vethPairs() {
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echo "setting up ${VETH0}: namespace: ${NS0}"
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ip netns add ${NS1}
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ip link add ${VETH0} type veth peer name ${VETH1}
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if [ -f /proc/net/if_inet6 ]; then
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echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
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fi
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echo "setting up ${VETH1}: namespace: ${NS1}"
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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 link set ${VETH0} up
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}
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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 $retval
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fi
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echo "${VETH0}:${VETH1},${NS1}" > ${SPECFILE}
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validate_veth_spec_file
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echo "Spec file created: ${SPECFILE}"
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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 1
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TEST_NAME="XSK KSELFTEST FRAMEWORK"
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echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Generic mode"
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vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
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retval=$?
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if [ $retval -eq 0 ]; then
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echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Native mode"
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vethXDPnative ${VETH0} ${VETH1} ${NS1}
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fi
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retval=$?
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test_status $retval "${TEST_NAME}"
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statusList+=($retval)
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## END TESTS
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cleanup_exit ${VETH0} ${VETH1} ${NS1}
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for _status in "${statusList[@]}"
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do
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if [ $_status -ne 0 ]; then
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test_exit $ksft_fail 0
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fi
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done
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test_exit $ksft_pass 0
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@ -0,0 +1,119 @@
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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.
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ksft_pass=0
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ksft_fail=1
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ksft_xfail=2
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ksft_xpass=3
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ksft_skip=4
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GREEN='\033[0;92m'
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YELLOW='\033[0;93m'
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RED='\033[0;31m'
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NC='\033[0m'
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STACK_LIM=131072
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SPECFILE=veth.spec
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validate_root_exec()
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{
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msg="skip all tests:"
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if [ $UID != 0 ]; then
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echo $msg must be run as root >&2
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test_exit $ksft_fail 2
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else
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return $ksft_pass
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fi
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}
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validate_veth_support()
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{
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msg="skip all tests:"
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if [ $(ip link add $1 type veth 2>/dev/null; echo $?;) != 0 ]; then
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echo $msg veth kernel support not available >&2
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test_exit $ksft_skip 1
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else
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ip link del $1
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return $ksft_pass
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fi
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}
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validate_veth_spec_file()
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{
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if [ ! -f ${SPECFILE} ]; then
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test_exit $ksft_skip 1
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fi
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}
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test_status()
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{
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statusval=$1
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if [ -n "${colorconsole+set}" ]; then
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if [ $statusval -eq 2 ]; then
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echo -e "${YELLOW}$2${NC}: [ ${RED}FAIL${NC} ]"
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elif [ $statusval -eq 1 ]; then
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echo -e "${YELLOW}$2${NC}: [ ${RED}SKIPPED${NC} ]"
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elif [ $statusval -eq 0 ]; then
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echo -e "${YELLOW}$2${NC}: [ ${GREEN}PASS${NC} ]"
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fi
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else
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if [ $statusval -eq 2 ]; then
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echo -e "$2: [ FAIL ]"
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elif [ $statusval -eq 1 ]; then
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echo -e "$2: [ SKIPPED ]"
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elif [ $statusval -eq 0 ]; then
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echo -e "$2: [ PASS ]"
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fi
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fi
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}
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test_exit()
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{
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retval=$1
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if [ $2 -ne 0 ]; then
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test_status $2 $(basename $0)
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fi
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exit $retval
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}
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clear_configs()
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{
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if [ $(ip netns show | grep $3 &>/dev/null; echo $?;) == 0 ]; then
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[ $(ip netns exec $3 ip link show $2 &>/dev/null; echo $?;) == 0 ] &&
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{ echo "removing link $1:$2"; ip netns exec $3 ip link del $2; }
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echo "removing ns $3"
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ip netns del $3
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fi
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#Once we delete a veth pair node, the entire veth pair is removed,
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#this is just to be cautious just incase the NS does not exist then
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#veth node inside NS won't get removed so we explicitly remove it
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[ $(ip link show $1 &>/dev/null; echo $?;) == 0 ] &&
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{ echo "removing link $1"; ip link del $1; }
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if [ -f ${SPECFILE} ]; then
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echo "removing spec file:" ${SPECFILE}
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rm -f ${SPECFILE}
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fi
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}
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cleanup_exit()
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{
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echo "cleaning up..."
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clear_configs $1 $2 $3
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}
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validate_ip_utility()
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{
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[ ! $(type -P ip) ] && { echo "'ip' not found. Skipping tests."; test_exit $ksft_skip 1; }
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}
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vethXDPgeneric()
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{
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ip link set dev $1 xdpdrv off
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ip netns exec $3 ip link set dev $2 xdpdrv off
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}
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vethXDPnative()
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{
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ip link set dev $1 xdpgeneric off
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ip netns exec $3 ip link set dev $2 xdpgeneric off
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}
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