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Message-Id: <20201030121347.26984-2-weqaar.a.janjua@intel.com>
Date: Fri, 30 Oct 2020 12:13:43 +0000
From: Weqaar Janjua <weqaar.janjua@...il.com>
To: bpf@...r.kernel.org, netdev@...r.kernel.org, daniel@...earbox.net,
ast@...nel.org, magnus.karlsson@...il.com, bjorn.topel@...el.com
Cc: Weqaar Janjua <weqaar.a.janjua@...el.com>, shuah@...nel.org,
skhan@...uxfoundation.org, linux-kselftest@...r.kernel.org,
anders.roxell@...aro.org, jonathan.lemon@...il.com
Subject: [PATCH bpf-next 1/5] selftests/xsk: xsk selftests framework
This patch adds AF_XDP selftests framework under selftests/xsk.
Prerequisites setup by script TEST_PREREQUISITES.sh:
Set up veth interfaces as per the topology shown in README:
* 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
that is read by test scripts - filenames prefixed with TEST_XSK
*** xxxx and yyyy are randomly generated 4 digit numbers used to avoid
conflict with any existing interface
Signed-off-by: Weqaar Janjua <weqaar.a.janjua@...el.com>
---
MAINTAINERS | 1 +
tools/testing/selftests/Makefile | 1 +
tools/testing/selftests/xsk/Makefile | 10 ++
tools/testing/selftests/xsk/README | 72 +++++++++++
.../selftests/xsk/TEST_PREREQUISITES.sh | 53 ++++++++
tools/testing/selftests/xsk/TEST_XSK.sh | 15 +++
tools/testing/selftests/xsk/config | 1 +
tools/testing/selftests/xsk/prereqs.sh | 119 ++++++++++++++++++
tools/testing/selftests/xsk/xskenv.sh | 33 +++++
9 files changed, 305 insertions(+)
create mode 100644 tools/testing/selftests/xsk/Makefile
create mode 100644 tools/testing/selftests/xsk/README
create mode 100755 tools/testing/selftests/xsk/TEST_PREREQUISITES.sh
create mode 100755 tools/testing/selftests/xsk/TEST_XSK.sh
create mode 100644 tools/testing/selftests/xsk/config
create mode 100755 tools/testing/selftests/xsk/prereqs.sh
create mode 100755 tools/testing/selftests/xsk/xskenv.sh
diff --git a/MAINTAINERS b/MAINTAINERS
index f281f8077de0..41c214375f9e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19127,6 +19127,7 @@ F: include/uapi/linux/if_xdp.h
F: net/xdp/
F: samples/bpf/xdpsock*
F: tools/lib/bpf/xsk*
+F: tools/testing/selftests/xsk/
XEN BLOCK SUBSYSTEM
M: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index d9c283503159..d9b1f7d4313b 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -67,6 +67,7 @@ TARGETS += tpm2
TARGETS += user
TARGETS += vm
TARGETS += x86
+TARGETS += xsk
TARGETS += zram
#Please keep the TARGETS list alphabetically sorted
# Run "make quicktest=1 run_tests" or
diff --git a/tools/testing/selftests/xsk/Makefile b/tools/testing/selftests/xsk/Makefile
new file mode 100644
index 000000000000..6e0d657bc5e0
--- /dev/null
+++ b/tools/testing/selftests/xsk/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2020 Intel Corporation.
+
+TEST_PROGS := TEST_PREREQUISITES.sh \
+ TEST_XSK.sh
+TEST_FILES := prereqs.sh xskenv.sh
+TEST_TRANSIENT_FILES := veth.spec
+
+KSFT_KHDR_INSTALL := 1
+include ../lib.mk
diff --git a/tools/testing/selftests/xsk/README b/tools/testing/selftests/xsk/README
new file mode 100644
index 000000000000..a255b3050afc
--- /dev/null
+++ b/tools/testing/selftests/xsk/README
@@ -0,0 +1,72 @@
+Copyright (c) 2020 Intel Corporation, Weqaar Janjua <weqaar.a.janjua@...el.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 TEST_PREREQUISITES.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
+ that is read by test scripts - filenames prefixed with TEST_XSK_
+ *** xxxx and yyyy are randomly generated 4 digit numbers used to avoid
+ conflict with any existing interface
+
+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 (summary only):
+ sudo make summary=1 run_tests
+
+Run (full color-coded output):
+ sudo make colorconsole=1 run_tests
+
+Run (full output without color-coding):
+ sudo make run_tests
+
+Clean:
+ make clean
diff --git a/tools/testing/selftests/xsk/TEST_PREREQUISITES.sh b/tools/testing/selftests/xsk/TEST_PREREQUISITES.sh
new file mode 100755
index 000000000000..cd542dbaf7ac
--- /dev/null
+++ b/tools/testing/selftests/xsk/TEST_PREREQUISITES.sh
@@ -0,0 +1,53 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2020 Intel Corporation.
+
+. prereqs.sh
+
+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}
+NS1=af_xdp${VETH1_POSTFIX}
+IPADDR_VETH0=192.168.222.1/30
+IPADDR_VETH1=192.168.222.2/30
+MTU=1500
+
+setup_vethPairs() {
+ echo "setting up ${VETH0}: root: ${IPADDR_VETH0}"
+ ip netns add ${NS1}
+ ip link add ${VETH0} type veth peer name ${VETH1}
+ ip addr add dev ${VETH0} ${IPADDR_VETH0}
+ echo "setting up ${VETH1}: ${NS1}: ${IPADDR_VETH1}"
+ ip link set ${VETH1} netns ${NS1}
+ ip netns exec ${NS1} ip addr add dev ${VETH1} ${IPADDR_VETH1}
+ ip netns exec ${NS1} ip link set ${VETH1} mtu ${MTU}
+ ip netns exec ${NS1} ip link set ${VETH1} up
+ ip link set ${VETH0} mtu ${MTU}
+ ip link set ${VETH0} up
+}
+
+validate_root_exec
+validate_veth_support ${VETH0}
+validate_configs
+setup_vethPairs
+
+retval=$?
+if [ $retval -ne 0 ]; then
+ test_status $retval "${TEST_NAME}"
+ cleanup_exit ${VETH0} ${VETH1} ${NS1}
+ exit $retval
+fi
+
+echo "${VETH0}:${VETH1},${NS1}" > ${SPECFILE}
+
+echo "Spec file created: ${SPECFILE}"
+
+test_status $retval "${TEST_NAME}"
+
+exit $retval
diff --git a/tools/testing/selftests/xsk/TEST_XSK.sh b/tools/testing/selftests/xsk/TEST_XSK.sh
new file mode 100755
index 000000000000..ad31b3e38b8f
--- /dev/null
+++ b/tools/testing/selftests/xsk/TEST_XSK.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2020 Intel Corporation.
+
+. prereqs.sh
+. xskenv.sh
+
+TEST_NAME="XSK FRAMEWORK"
+
+test_status $ksft_pass "${TEST_NAME}"
+
+# Must be called in the last test to execute
+cleanup_exit ${VETH0} ${VETH1} ${NS1}
+
+test_exit $ksft_pass 0
diff --git a/tools/testing/selftests/xsk/config b/tools/testing/selftests/xsk/config
new file mode 100644
index 000000000000..80311f71266d
--- /dev/null
+++ b/tools/testing/selftests/xsk/config
@@ -0,0 +1 @@
+CONFIG_VETH=m
diff --git a/tools/testing/selftests/xsk/prereqs.sh b/tools/testing/selftests/xsk/prereqs.sh
new file mode 100755
index 000000000000..4c20aec45d99
--- /dev/null
+++ b/tools/testing/selftests/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 $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:" veth.spec
+ rm -f ${SPECFILE}
+ fi
+}
+
+cleanup_exit()
+{
+ echo "cleaning up..."
+ clear_configs $1 $2 $3
+}
+
+validate_configs()
+{
+ [ ! $(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 $2 xdpgeneric off
+}
diff --git a/tools/testing/selftests/xsk/xskenv.sh b/tools/testing/selftests/xsk/xskenv.sh
new file mode 100755
index 000000000000..afc10bbdfb50
--- /dev/null
+++ b/tools/testing/selftests/xsk/xskenv.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2020 Intel Corporation.
+
+. prereqs.sh
+
+XSKDIR=xdpprogs
+XSKOBJ=xdpxceiver
+NUMPKTS=10000
+
+validate_veth_spec_file
+
+VETH0=$(cat ${SPECFILE} | cut -d':' -f 1)
+VETH1=$(cat ${SPECFILE} | cut -d':' -f 2 | cut -d',' -f 1)
+NS1=$(cat ${SPECFILE} | cut -d':' -f 2 | cut -d',' -f 2)
+
+execxdpxceiver()
+{
+ local -a 'paramkeys=("${!'"$1"'[@]}")' copy
+ paramkeysstr=${paramkeys[*]}
+
+ for index in $paramkeysstr;
+ do
+ current=$1"[$index]"
+ copy[$index]=${!current}
+ done
+
+ if [ -f ./${XSKOBJ} ]; then
+ ./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS}
+ else
+ ./${XSKDIR}/${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS}
+ fi
+}
--
2.20.1
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