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@xxxxxxxxx>
---
tools/testing/selftests/bpf/Makefile | 4 +-
tools/testing/selftests/bpf/test_xsk.sh | 152 +++++++++++++++++++++
tools/testing/selftests/bpf/xsk_prereqs.sh | 119 ++++++++++++++++
3 files changed, 274 insertions(+), 1 deletion(-)
create mode 100755 tools/testing/selftests/bpf/test_xsk.sh
create mode 100755 tools/testing/selftests/bpf/xsk_prereqs.sh
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index ac25ba5d0d6c..6a1ddfe68f15 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -46,7 +46,8 @@ endif
TEST_GEN_FILES =
TEST_FILES = test_lwt_ip_encap.o \
- test_tc_edt.o
+ test_tc_edt.o \
+ xsk_prereqs.sh
# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
@@ -70,6 +71,7 @@ TEST_PROGS := test_kmod.sh \
test_bpftool_build.sh \
test_bpftool.sh \
test_bpftool_metadata.sh \
+ test_xsk.sh
TEST_PROGS_EXTENDED := with_addr.sh \
with_tunnels.sh \
diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
new file mode 100755
index 000000000000..cae4c5574c4c
--- /dev/null
+++ b/tools/testing/selftests/bpf/test_xsk.sh
@@ -0,0 +1,152 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2020 Intel Corporation, Weqaar Janjua <weqaar.a.janjua@xxxxxxxxx>
+
+# AF_XDP selftests based on veth
+#
+# End-to-end AF_XDP over Veth test
+#
+# Topology:
+# ---------
+# ----------- -----------
+# | 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
+#
+# 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 (full color-coded output):
+# sudo ./test_xsk.sh -c
+#
+# If running from kselftests:
+# sudo make colorconsole=1 run_tests
+#
+# Run (full output without color-coding):
+# sudo ./test_xsk.sh
+
+. xsk_prereqs.sh
+
+while getopts c flag
+do
+ case "${flag}" in
+ c) colorconsole=1;;
+ esac
+done
+
+TEST_NAME="PREREQUISITES"
+
+URANDOM=/dev/urandom
+[ ! -e "${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() {
+ echo "setting up ${VETH0}: namespace: ${NS0}"
+ ip netns add ${NS1}
+ ip link add ${VETH0} type veth peer name ${VETH1}
+ if [ -f /proc/net/if_inet6 ]; then
+ echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
+ fi
+ echo "setting up ${VETH1}: namespace: ${NS1}"
+ 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 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
+
+echo "Spec file created: ${SPECFILE}"
+
+test_status $retval "${TEST_NAME}"
+
+## START TESTS
+
+statusList=()
+
+### TEST 1
+TEST_NAME="XSK KSELFTEST FRAMEWORK"
+
+echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Generic mode"
+vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
+
+retval=$?
+if [ $retval -eq 0 ]; then
+ echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Native mode"
+ vethXDPnative ${VETH0} ${VETH1} ${NS1}
+fi
+
+retval=$?
+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
diff --git a/tools/testing/selftests/bpf/xsk_prereqs.sh b/tools/testing/selftests/bpf/xsk_prereqs.sh
new file mode 100755
index 000000000000..29762739c21b
--- /dev/null
+++ b/tools/testing/selftests/bpf/xsk_prereqs.sh
@@ -0,0 +1,119 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2020 Intel Corporation.
+
+ksft_pass=0
+ksft_fail=1
+ksft_xfail=2
+ksft_xpass=3
+ksft_skip=4
+
+GREEN='\033[0;92m'
+YELLOW='\033[0;93m'
+RED='\033[0;31m'
+NC='\033[0m'
+STACK_LIM=131072
+SPECFILE=veth.spec
+
+validate_root_exec()
+{
+ msg="skip all tests:"
+ if [ $UID != 0 ]; then
+ echo $msg must be run as root >&2
+ test_exit $ksft_fail 2
+ else
+ return $ksft_pass
+ fi
+}
+
+validate_veth_support()
+{
+ msg="skip all tests:"
+ if [ $(ip link add $1 type veth 2>/dev/null; echo $?;) != 0 ]; then
+ echo $msg veth kernel support not available >&2
+ test_exit $ksft_skip 1
+ else
+ ip link del $1
+ return $ksft_pass
+ fi
+}
+
+validate_veth_spec_file()
+{
+ if [ ! -f ${SPECFILE} ]; then
+ test_exit $ksft_skip 1
+ fi
+}
+
+test_status()
+{
+ statusval=$1
+ if [ -n "${colorconsole+set}" ]; then
+ if [ $statusval -eq 2 ]; then
+ echo -e "${YELLOW}$2${NC}: [ ${RED}FAIL${NC} ]"
+ elif [ $statusval -eq 1 ]; then
+ echo -e "${YELLOW}$2${NC}: [ ${RED}SKIPPED${NC} ]"
+ elif [ $statusval -eq 0 ]; then
+ echo -e "${YELLOW}$2${NC}: [ ${GREEN}PASS${NC} ]"
+ fi
+ else
+ if [ $statusval -eq 2 ]; then
+ echo -e "$2: [ FAIL ]"
+ elif [ $statusval -eq 1 ]; then
+ echo -e "$2: [ SKIPPED ]"
+ elif [ $statusval -eq 0 ]; then
+ echo -e "$2: [ PASS ]"
+ fi
+ fi
+}
+
+test_exit()
+{
+ retval=$1
+ if [ $2 -ne 0 ]; then
+ test_status $2 $(basename $0)
+ fi
+ exit $retval
+}
+
+clear_configs()
+{
+ if [ $(ip netns show | grep $3 &>/dev/null; echo $?;) == 0 ]; then
+ [ $(ip netns exec $3 ip link show $2 &>/dev/null; echo $?;) == 0 ] &&
+ { echo "removing link $1:$2"; ip netns exec $3 ip link del $2; }
+ echo "removing ns $3"
+ ip netns del $3
+ fi
+ #Once we delete a veth pair node, the entire veth pair is removed,
+ #this is just to be cautious just incase the NS does not exist then
+ #veth node inside NS won't get removed so we explicitly remove it
+ [ $(ip link show $1 &>/dev/null; echo $?;) == 0 ] &&
+ { echo "removing link $1"; ip link del $1; }
+ if [ -f ${SPECFILE} ]; then
+ echo "removing spec file:" ${SPECFILE}
+ rm -f ${SPECFILE}
+ fi
+}
+
+cleanup_exit()
+{
+ echo "cleaning up..."
+ clear_configs $1 $2 $3
+}
+
+validate_ip_utility()
+{
+ [ ! $(type -P ip) ] && { echo "'ip' not found. Skipping tests."; test_exit $ksft_skip 1; }
+}
+
+vethXDPgeneric()
+{
+ ip link set dev $1 xdpdrv off
+ ip netns exec $3 ip link set dev $2 xdpdrv off
+}
+
+vethXDPnative()
+{
+ ip link set dev $1 xdpgeneric off
+ ip netns exec $3 ip link set dev $2 xdpgeneric off
+}
--
2.20.1
