[LTP] [PATCH 1/2] network: vxlan: add new test

* [LTP] [PATCH 1/2] network: vxlan: add new test
@ 2014-02-28 10:55 Alexey Kodanev
  2014-02-28 10:55 ` [LTP] [PATCH 2/2] network: vxlan: add test to runtest/network_stress Alexey Kodanev
  0 siblings, 1 reply; 2+ messages in thread
From: Alexey Kodanev @ 2014-02-28 10:55 UTC (permalink / raw)
  To: ltp-list; +Cc: vasily.isaenko

Virtual eXtensible Local Area Network (VXLAN) provides L2 networks
over existed L3 networks. It is using UDP (port 8472) to encapsulate
data packets. More information:
http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-08

Test cases:
1. Local test, check if we can create 5000 VXLAN interfaces.
2. Local test, check if we can create and then delete VXLAN
interface 5000 times.
3. Requires remote host, test will setup virtual sub-net
192.168.124.*/24 between two hosts, then will compare
TCP performance with and without VXLAN (tcp_fastopen test).
4. The same as above but must fail, because VXLAN allows
to communicate only within the same VXLAN segment.

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
---
 testcases/network/vxlan/Makefile   |   23 +++
 testcases/network/vxlan/vxlan01.sh |  310 ++++++++++++++++++++++++++++++++++++
 2 files changed, 333 insertions(+), 0 deletions(-)
 create mode 100644 testcases/network/vxlan/Makefile
 create mode 100755 testcases/network/vxlan/vxlan01.sh

diff --git a/testcases/network/vxlan/Makefile b/testcases/network/vxlan/Makefile
new file mode 100644
index 0000000..2c93770
--- /dev/null
+++ b/testcases/network/vxlan/Makefile
@@ -0,0 +1,23 @@
+# Copyright (c) 2014 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+top_srcdir		?= ../../..
+
+include $(top_srcdir)/include/mk/env_pre.mk
+
+INSTALL_TARGETS		:= vxlan01.sh
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/network/vxlan/vxlan01.sh b/testcases/network/vxlan/vxlan01.sh
new file mode 100755
index 0000000..4a2a257
--- /dev/null
+++ b/testcases/network/vxlan/vxlan01.sh
@@ -0,0 +1,310 @@
+#!/bin/sh
+
+# Copyright (c) 2014 Oracle and/or its affiliates. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# Author: Alexey Kodanev <alexey.kodanev@oracle.com>
+#
+# Virtual eXtensible Local Area Network (VXLAN) provides L2 networks
+# over existed L3 networks. It is using UDP (port 8472) to encapsulate
+# data packets. More information:
+# http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-08
+#
+# Test description:
+# Test-case 1: Local test, check if we can create 5000 VXLAN interfaces.
+#
+# Test-case 2: Local test, check if we can create and then delete VXLAN
+#              interface 5000 times.
+#
+# Test-case 3: Requires remote host, test will setup virtual sub-net
+#              192.168.124.*/24 between two hosts, then will compare
+#              TCP performance with and without VXLAN (tcp_fastopen test).
+#
+# Test-case 4: The same as above but must fail, because VXLAN allows
+#              to communicate only within the same VXLAN segment.
+#
+# Warning: Test assumes that machines don't have any existed VXLANs.
+#          If machine has VXLANs, the test might fail or eventually delete
+#          them in cleanup function. See "start_vni" variable which can
+#          solve it.
+#
+#
+
+user_name="root"
+use_ssh=0
+
+ip_remote=${IPV4_NETWORK}.${RHOST_IPV4_HOST}
+ip_vxlan_remote="192.168.124.1"
+mac_vxlan_remote="3A:1C:C0:A8:7C:01"
+
+ip_local=${IPV4_NETWORK}.${LHOST_IPV4_HOST}
+ip_vxlan_local="192.168.124.2"
+mac_vxlan_local="3A:1C:C0:A8:7C:02"
+
+export RC=0
+export TST_TOTAL=3
+export TCID="vxlan01"
+export TST_COUNT=0
+
+vxlan_max=5000
+start_vni=16700000
+clients_num=2
+client_requests=500000
+max_requests=10
+srv_port=$(( $RANDOM % 28232 + 32768 ))
+tdir="${LTPROOT}/testcases/bin/"
+
+while getopts :hsx:i:r:c:R:p: opt; do
+	case "$opt" in
+	h)
+		echo "Usage:"
+		echo "h        help"
+		echo "s        use ssh to run remote cmds"
+		echo "x n      n is a number of VXLANs for tc1 and tc2"
+		echo "i n      start VNI to use"
+		echo "r n      client requests for TCP performance test"
+		echo "c n      clients run concurrently in TCP perf"
+		echo "R x      num of reqs, after which conn.closed in TCP perf"
+		echo "p x      x and x + 1 are ports in TCP perf"
+		exit 0
+	;;
+	s) use_ssh=1 ;;
+	x) vxlan_max=$OPTARG ;;
+	i) start_vni=$OPTARG ;;
+	c) clients_num=$OPTARG ;;
+	r) client_requests=$OPTARG ;;
+	R) max_requests=$OPTARG ;;
+	p) srv_port=$OPTARG ;;
+	*)
+		tst_brkm TBROK NULL "unknown option: $opt"
+		exit 2
+	;;
+	esac
+done
+
+tst_rhost_run()
+{
+	if [ "$use_ssh" -eq 1 ]; then
+		ssh -n -f $user_name@$RHOST "sh -c 'nohup $1 &'" \
+> /dev/null 2>&1
+	else
+		rsh -n -l $user_name $RHOST "sh -c 'nohup $1 &'" \
+> /dev/null 2>&1
+	fi
+
+	if [ $? -ne 0 ]; then
+		tst_brkm TBROK NULL "No route to host $RHOST"
+		exit 2
+	fi
+}
+
+cleanup_and_exit()
+{
+	tst_resm TINFO "cleanup..."
+	local vxlans=`ip link | sed -nE 's/^[0-9]+: (ltp_vxl[0-9]+):.+/\1/p'`
+	for vx in $vxlans; do
+		ip link delete $vx
+	done
+
+	if [ $TST_COUNT -ge 3 ]; then
+		tst_rhost_run "ip link delete ltp_vxl0"
+		tst_rhost_run "pkill -9 tcp_fastopen\$"
+		pkill -9 "tcp_fastopen\$"
+	fi
+
+	exit 2
+}
+trap "cleanup_and_exit" SIGINT
+
+run()
+{
+	$1 > /dev/null 2>&1
+	if [ $? -ne 0 ]; then
+		tst_brkm TBROK NULL "cmd failed: $1"
+		cleanup_and_exit
+	fi
+}
+
+vxlan_test01()
+{
+	local tc="tc$TST_COUNT"
+	local max=$(( $start_vni + $vxlan_max ))
+	tst_resm TINFO "$tc: create $vxlan_max VXLANs, then delete them"
+	local opt="group 239.1.1.1"
+
+	for (( i = $start_vni; i < $max; ++i )); do
+		run "ip link add ltp_vxl${i} type vxlan id $i $opt"
+		run "ip link set ltp_vxl${i} up"
+	done
+
+	for (( i = $start_vni; i < $max; ++i )); do
+		run "ip link set ltp_vxl${i} down"
+		run "ip link delete ltp_vxl${i}"
+	done
+	tst_resm TPASS "$tc: done"
+}
+
+vxlan_test02()
+{
+	local tc="tc$TST_COUNT"
+
+	local opt="group 239.1.1.1"
+	tst_resm TINFO "$tc: creat, delete ltp_vxl1 $vxlan_max times"
+	for (( i = 0; i < $vxlan_max; ++i )); do
+		run "ip link add ltp_vxl1 type vxlan id $start_vni $opt"
+		run "ip link set ltp_vxl1 up"
+		run "ip link delete ltp_vxl1"
+	done
+	tst_resm TPASS "$tc: done"
+}
+
+tcp_test()
+{
+	local ip_addr=$1
+	local rfile=$2
+	local ret=0
+	tst_rhost_run "${tdir}tcp_fastopen -R $max_requests \
+-g $srv_port >> /tmp/tcp.log 2>&1"
+	sleep 5
+
+	# run local tcp client
+	${tdir}tcp_fastopen -a $clients_num -r $client_requests -l \
+-H $ip_addr -g $srv_port -d $rfile >> /tmp/tcp.log 2>&1 || ret=1
+
+	if [ $ret -eq 0 -a ! -f $rfile ]; then
+		tst_brkm TBROK NULL "can't read $rfile"
+		cleanup_and_exit
+	fi
+
+	srv_port=$(( $srv_port + 1 ))
+	tst_rhost_run "pkill -9 tcp_fastopen\$"
+
+	return $ret
+}
+
+vxlan_test03()
+{
+	local ret=0
+	local tc="tc$TST_COUNT"
+	tst_resm TINFO "$tc: virtual bridge & VXLAN, connect 2 hosts"
+	local opt="rsc proxy nolearning"
+
+	run "ip link add ltp_vxl0 type vxlan id $1 $opt"
+	run "ip link set ltp_vxl0 address $mac_vxlan_local"
+	run "ip address add ${ip_vxlan_local}/24 dev ltp_vxl0"
+	run "ip link set up ltp_vxl0"
+
+	run "arp -s $ip_vxlan_remote $mac_vxlan_remote -i ltp_vxl0"
+	run "bridge fdb add to $mac_vxlan_remote dst $ip_remote dev ltp_vxl0"
+
+	tst_rhost_run "ip link add ltp_vxl0 type vxlan id $2 $opt"
+	tst_rhost_run "ip link set ltp_vxl0 address $mac_vxlan_remote"
+	tst_rhost_run "ip address add ${ip_vxlan_remote}/24 dev ltp_vxl0"
+	tst_rhost_run "ip link set up ltp_vxl0"
+
+	tst_rhost_run "arp -s $ip_vxlan_local $mac_vxlan_local -i ltp_vxl0"
+	tst_rhost_run "bridge fdb add to $mac_vxlan_local dst $ip_local \
+dev ltp_vxl0"
+
+	sleep 2
+
+	local rfile="${TMPDIR}/vxlan_result"
+
+	tcp_test $ip_vxlan_remote $rfile || return 1
+	local vt=`cat $rfile`
+	run "ip link delete ltp_vxl0"
+	tst_rhost_run "ip link delete ltp_vxl0"
+
+	tcp_test $ip_remote $rfile || return 1
+	local lt=`cat $rfile`
+
+	tst_resm TINFO "$tc: time lan($lt) vxlan($vt) ms"
+
+	per=$(( $vt * 100 / $lt - 100 ))
+	# In average cases (with small packets less then 150 bytes)
+	# vxlan slower by 10-30%, set threshold to 40% so when value is
+	# above it will be definitely an error in vxlan
+	if [ "$per" -lt 40 ]; then
+		tst_resm TINFO "$tc: vxlan slower by $per %"
+	else
+		tst_resm TINFO "$tc: vxlan too slow: by $per %"
+		ret=1
+	fi
+
+	return $ret
+}
+
+if [ "`id -u`" -ne 0 ]; then
+	tst_brkm TCONF NULL "test must be run as root"
+	exit 0
+fi
+
+tst_kvercmp 3 8 0
+if [ $? -eq 0 ]; then
+	tst_brkm TCONF NULL "test must be run with kernel 3.8 or newer"
+	exit 0
+fi
+
+ip link add type vxlan help 2>&1 | grep -q "vxlan"
+if [ $? -eq 1 ]; then
+	tst_brkm TCONF NULL "iproute2 doesn't support vxlan"
+	exit 0
+fi
+
+modprobe vxlan > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+	tst_brkm TCONF NULL "Test requiers vxlan module"
+	exit 0
+fi
+
+if [ ! -x ${tdir}tcp_fastopen ]; then
+	tst_brkm TCONF NULL "can't find tcp_fastopen test"
+	exit 0
+fi
+
+if [ -z $ip_local -o -z $ip_remote ]; then
+	tst_brkm TBROK NULL "you must specify IP address"
+	exit 2
+fi
+
+TST_COUNT=1
+vxlan_test01
+
+TST_COUNT=2
+vxlan_test02
+
+# Networks with the same VNI must work
+res="TPASS"
+TST_COUNT=3
+# VNI is 24 bits long, so max value, which is not reserved, is 0xFFFFFE
+vxlan_test03 "0xFFFFFE" "0xFFFFFE"
+if [ $? -ne 0 ]; then
+	res="TFAIL"
+	RC=1
+fi
+tst_resm $res "tc$TST_COUNT: done"
+
+# Different VNI shall not work together, test must fail
+res="TPASS"
+TST_COUNT=4
+vxlan_test03 "0xFFFFFE" "0xFFFFFD"
+if [ $? -eq 0 ]; then
+	res="TFAIL"
+	RC=1
+fi
+tst_resm $res "tc$TST_COUNT: done"
+
+exit $RC
-- 
1.7.1


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