[PATCH v2] [TCK] nwfilter: add a test case using concurrency

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V2:
   - following Eric's suggestions from review of V1
   - all scripts started by the main script trap on signal 2 and clean up
   - the main program waits for all child processes to have terminated
   - the test now requires each child process to do 10 steps:
      - 1 VM start-destroy cycle is 1 step
      - 50 filter changes are considered 1 step
   - the test terminates after 3 minutes (in case the test system is very slow / busy) with a bail out message

Now that the existing scripts are cleaned up and my POSIX compliancy shell-scripting skills have temporarily:-)  improved, I am now adding a test case that exercises concurrency. The test case creates and destroys 2 VMs concurrently as well as changes their referenced filters in a tight loop. This kind of test previously uncovered

- deadlocks in libvirt due to lock-ordering in the nwfilter subsystem
- libvirt termination bug in libaugeas due to doubly closed file
descriptors and the side effects

All of these have been fixed recently.

The test script is known to run in bash, dash and ksh shells.

Signed-off-by: Stefan Berger<stefanb@xxxxxxxxxx>

---
 scripts/nwfilter/060-concurrency.t               |    5
 scripts/nwfilter/concurrency/chg-vm-filter.sh    |   29 +
 scripts/nwfilter/concurrency/start-destroy-vm.sh |   31 +
 scripts/nwfilter/concurrency/tck-vm1-filter1.xml |   26 +
 scripts/nwfilter/concurrency/tck-vm1-filter2.xml |   26 +
 scripts/nwfilter/concurrency/tck-vm1.xml         |   30 +
 scripts/nwfilter/concurrency/tck-vm2-filter1.xml |   26 +
 scripts/nwfilter/concurrency/tck-vm2-filter2.xml |   26 +
 scripts/nwfilter/concurrency/tck-vm2.xml         |   30 +
 scripts/nwfilter/nwfilter_concurrent.sh          |  406 +++++++++++++++++++++++
 10 files changed, 635 insertions(+)

Index: libvirt-tck/scripts/nwfilter/060-concurrency.t
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/060-concurrency.t
@@ -0,0 +1,5 @@
+#!/bin/sh
+
+pwd=$(dirname -- "$0")
+
+(cd -- "${pwd}"&&  sh ./nwfilter_concurrent.sh --tap-test)
Index: libvirt-tck/scripts/nwfilter/nwfilter_concurrent.sh
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/nwfilter_concurrent.sh
@@ -0,0 +1,406 @@
+#!/bin/sh
+
+VIRSH=virsh
+
+# For each line starting with uri=, remove the prefix and set the hold
+# space to the rest of the line.  Then at file end, print the hold
+# space, which is effectively the last uri= line encountered.
+uri=$(sed -n '/^uri[     ]*=[     ]*/ {
+  s///
+  h
+}
+$ {
+  x
+  p
+}'<  "$LIBVIRT_TCK_CONFIG")
+: "${uri:=qemu:///system}"
+
+LIBVIRT_URI=${uri}
+
+FLAG_WAIT="$((1<<0))"
+FLAG_ATTACH="$((1<<1))"
+FLAG_VERBOSE="$((1<<2))"
+FLAG_LIBVIRT_TEST="$((1<<3))"
+FLAG_TAP_TEST="$((1<<4))"
+FLAG_FORCE_CLEAN="$((1<<5))"
+
+failctr=0
+passctr=0
+attachfailctr=0
+attachctr=0
+
+TAP_FAIL_LIST=""
+TAP_FAIL_CTR=0
+TAP_TOT_CTR=0
+
+usage() {
+  cmd="$0"
+cat<<EOF
+Usage: ${cmd} [--help|-h|-?] [--noattach] [--wait] [--verbose]
+              [--libvirt-test] [--tap-test]
+
+Options:
+ --help,-h,-?   : Display this help screen.
+ --noattach     : Skip tests that attach and detach a network interface
+ --wait         : Wait for the user to press the enter key once an error
+                  was detected
+ --verbose      : Verbose output
+ --libvirt-test : Use the libvirt test output format
+ --tap-test     : TAP format output
+ --force        : Allow the automatic cleaning of VMs and nwfilters
+                  previously created by the TCK test suite
+
+This test will create two virtual machines. The one virtual machine
+will use a filter called '${TESTFILTERNAME}', and reference the filter
+'clean-traffic' which should be available by default with every install.
+The other virtual machine will reference the filter 'tck-testcase' and will
+have its filter permanently updated.
+EOF
+}
+
+
+tap_fail() {
+  txt=$(echo "$2" | gawk '{print substr($0,1,66)}')
+  echo "not ok $1 - ${txt}"
+  TAP_FAIL_LIST="$TAP_FAIL_LIST $1 "
+  TAP_FAIL_CTR=$(($TAP_FAIL_CTR + 1))
+  TAP_TOT_CTR=$(($TAP_TOT_CTR + 1))
+}
+
+tap_pass() {
+  txt=$(echo "$2" | gawk '{print substr($0,1,70)}')
+  echo "ok $1 - ${txt}"
+  TAP_TOT_CTR=$(($TAP_TOT_CTR + 1))
+}
+
+tap_final() {
+  [ -n "${TAP_FAIL_LIST}" ]&&  echo "FAILED tests ${TAP_FAIL_LIST}"
+
+  okay=`echo "($TAP_TOT_CTR-$TAP_FAIL_CTR)*100/$TAP_TOT_CTR" | bc -l`
+  txt=$(echo $okay | gawk '{print substr($0,1,5)}')
+  echo "Failed ${TAP_FAIL_CTR}/${TAP_TOT_CTR} tests, ${txt}% okay"
+}
+
+# A wrapper for mktemp in case it does not exist
+# Echos the name of a temporary file.
+mktmpdir() {
+  {
+    tmp=$( (umask 077&&  mktemp -d ./nwfvmtest.XXXXXX) 2>/dev/null)&&
+    test -n "$tmp"&&  test -d "$tmp"
+  } ||
+  {
+    tmp=./nwfvmtest$$-$RANDOM
+    (umask 077&&  mkdir "$tmp")
+  } || { echo "failed to create secure temporary directory">&2; exit 1; }
+  echo "${tmp}"
+  return 0
+}
+
+
+PRGDIR="./concurrency"
+CREATE_DES_VM1="${PRGDIR}/start-destroy-vm.sh 1"
+CREATE_DES_VM2="${PRGDIR}/start-destroy-vm.sh 2"
+CHG_FILTER_VM1="${PRGDIR}/chg-vm-filter.sh 1"
+CHG_FILTER_VM2="${PRGDIR}/chg-vm-filter.sh 2"
+
+
+startPrgs()
+{
+  flags="$1"
+
+  sh ${CHG_FILTER_VM1} "$4" 2>&1>/dev/null&
+  [ $? -ne 0 ]&&  \
+    ( killPrgs "${flags}" "Could not start program 3" ; return 1; )
+  CHG_FILTER_VM1_THR=$!
+
+  sh ${CHG_FILTER_VM2} "$5" 2>&1>/dev/null&
+  [ $? -ne 0 ]&&  \
+    ( killPrgs "${flags}" "Could not start program 4" ; return 1; )
+  CHG_FILTER_VM2_THR=$!
+
+  # Give some time for the filters to be created
+  sleep 2
+
+  sh ${CREATE_DES_VM1} "$2" 2>&1>/dev/null&
+  [ $? -ne 0 ]&&  \
+    ( killPrgs "${flags}" "Could not start program 1" ; return 1; )
+  CREATE_DES_VM1_THR=$!
+
+  sh ${CREATE_DES_VM2} "$3" 2>&1>/dev/null&
+  [ $? -ne 0 ]&&  \
+    ( killPrgs "${flags}" "Could not start program 2" ; return 1; )
+  CREATE_DES_VM2_THR=$!
+
+}
+
+
+killPrgs()
+{
+  msg="$1"
+
+  # terminate all process
+  [ "x${CREATE_DES_VM1_THR}x" != "xx" ]&&  \
+    kill -2 ${CREATE_DES_VM1_THR}
+  [ "x${CREATE_DES_VM2_THR}x" != "xx" ]&&  \
+    kill -2 ${CREATE_DES_VM2_THR}
+  [ "x${CHG_FILTER_VM1_THR}x" != "xx" ]&&  \
+    kill -2 ${CHG_FILTER_VM1_THR}
+  [ "x${CHG_FILTER_VM2_THR}x" != "xx" ]&&  \
+    kill -2 ${CHG_FILTER_VM2_THR}
+
+  wait
+}
+
+
+testFail()
+{
+  flags="$1"
+  msg="$2"
+
+  failctr=$(($failctr + 1))
+  if [ $(($flags&  $FLAG_VERBOSE)) -ne 0 ]; then
+    echo "FAIL : ${msg}"
+  fi
+  if [ $(($flags&  $FLAG_WAIT)) -ne 0 ]; then
+    echo "Press enter"
+    read enter
+  fi
+  [ $(($flags&  $FLAG_LIBVIRT_TEST)) -ne 0 ]&&  \
+    test_result $(($passctr + $failctr)) "" 1
+  [ $(($flags&  $FLAG_TAP_TEST)) -ne 0 ]&&  \
+    tap_fail $(($passctr + $failctr)) "${msg}"
+}
+
+
+testPass()
+{
+  flags="$1"
+  msg="$2"
+
+  passctr=$(($passctr + 1))
+  if [ $(($flags&  $FLAG_VERBOSE)) -ne 0 ]; then
+    echo "PASS : ${msg}"
+  fi
+  [ $(($flags&  $FLAG_LIBVIRT_TEST)) -ne 0 ]&&  \
+    test_result $(($passctr + $failctr)) "" 0
+  [ $(($flags&  $FLAG_TAP_TEST)) -ne 0 ]&&  \
+    tap_pass $(($passctr + $failctr)) "${msg}"
+}
+
+cleanup()
+{
+  rm -rf "$1"
+  killPrgs
+  exit $2
+}
+
+missedSteps()
+{
+  cur="$1"
+  exp="$2"
+  flags="$3"
+
+  while [ $cur -lt $exp ]; do
+    cur=$(($cur + 1))
+    testFail "${flags}" "$4 ${cur}"
+  done
+}
+
+runTest()
+{
+  flags="$1"
+
+  passctr=0
+  failctr=0
+
+  tmpdir=`mktmpdir`
+  failctr=0
+  passctr=0
+  logvm1="${PWD}/${tmpdir}/logvm1"
+  logvm2="${PWD}/${tmpdir}/logvm2"
+  logfivm1="${PWD}/${tmpdir}/logfivm1"
+  logfivm2="${PWD}/${tmpdir}/logfivm2"
+
+  # exp. number of steps each 'thread' has to do
+  steps=10
+
+  steps_vm1=0
+  steps_vm2=0
+  steps_fivm1=0
+  steps_fivm2=0
+
+  trap "cleanup ${tmpdir} 1" INT
+
+  if [ $(($flags&  $FLAG_TAP_TEST)) -ne 0 ]; then
+    # Need to display the number of total tests
+    tap_total=$((4 * $steps))
+    echo "1..${tap_total}"
+  fi
+
+  startPrgs "${flags}" "${logvm1}" "${logvm2}" \
+    "${logfivm1}" "${logfivm2}"
+
+  [ $? -ne 0 ]&&  rm -rf "${tmpdir}"&&  return 1;
+
+  # Test runs for a maximum of 3 minutes
+  now=`date +%s`
+  test_end=$(($now + 3 * 60))
+
+  while :;
+  do
+    # The logs give us the number of cycles the VMs were created
+    # and destroyed.
+    val=$(cat "${logvm1}" 2>/dev/null | tail -n 1)
+    while [ -n "${val}" ]&&  \
+          [ $steps_vm1 -lt $steps ]&&  [ $steps_vm1 -lt $val ]; do
+      steps_vm1=$(($steps_vm1 + 1))
+      testPass "${flags}" \
+        "VM1 log - step ${steps_vm1}"
+    done
+
+    val=$(cat "${logvm2}" 2>/dev/null | tail -n 1)
+    while [ -n "${val}" ]&&  \
+          [ $steps_vm2 -lt $steps ]&&  [ $steps_vm2 -lt $val ]; do
+      steps_vm2=$(($steps_vm2 + 1))
+      testPass "${flags}" \
+        "VM2 log - step ${steps_vm2}"
+    done
+
+    # The changing of the filters is expected to work much faster
+    val=$(cat "${logfivm1}" 2>/dev/null | tail -n 1)
+    while [ -n "${val}" ]&&  \
+          [ $steps_fivm1 -lt $steps ]&&  [ $steps_fivm1 -lt $(($val / 50)) ];
+    do
+      steps_fivm1=$(($steps_fivm1 + 1))
+      testPass "${flags}" \
+        "VM1 filter log - step ${steps_fivm1}"
+    done
+
+    val=$(cat "${logfivm2}" 2>/dev/null | tail -n 1)
+    while [ -n "${val}" ]&&  \
+          [ $steps_fivm2 -lt $steps ]&&  [ $steps_fivm2 -lt $(($val / 50)) ];
+    do
+      steps_fivm2=$(($steps_fivm2 + 1))
+      testPass "${flags}" \
+        "VM2 filter log - step ${steps_fivm2}"
+    done
+
+    [ $steps_vm1 -ge $steps ]&&  \
+       [ $steps_vm2   -ge $steps ]&&  \
+       [ $steps_fivm1 -ge $steps ]&&  \
+       [ $steps_fivm2 -ge $steps ]&&  \
+       break
+
+    now=`date +%s`
+    [ $now -gt $test_end ]&&  break
+
+    sleep 4
+  done
+
+  missedSteps $steps_vm1   $steps $flags "VM1 log - step "
+  missedSteps $steps_vm2   $steps $flags "VM2 log - step "
+  missedSteps $steps_fivm1 $steps $flags "VM1 filter log - step "
+  missedSteps $steps_fivm1 $steps $flags "VM2 filter log - step "
+
+  [ $now -gt $test_end ]&&  \
+    echo "Bail out! Not all tests finished before test expired. Busy system?"
+
+  cleanup "${tmpdir}" 0
+}
+
+
+main() {
+  prgname="$0"
+  xmldir="nwfilterxml2xmlin"
+  fwalldir="nwfilterxml2fwallout"
+  found=0
+  filtername="tck-testcase"
+  libvirtdpid=-1
+
+  flags=${FLAG_ATTACH}
+
+  while [ $# -ne 0 ]; do
+    case "$1" in
+    --help|-h|-\?) usage ${prgname}; exit 0;;
+    --noattach)     flags=$(($flags&  ~$FLAG_ATTACH));;
+    --wait)         flags=$(($flags | $FLAG_WAIT    ));;
+    --verbose)      flags=$(($flags | $FLAG_VERBOSE ));;
+    --libvirt-test) flags=$(($flags | $FLAG_LIBVIRT_TEST ));;
+    --tap-test)     flags=$(($flags | $FLAG_TAP_TEST ));;
+    --force)        flags=$(($flags | $FLAG_FORCE_CLEAN ));;
+    *) usage ${prgname}; exit 1;;
+    esac
+    shift 1
+  done
+
+  if [ `uname` != "Linux" ]; then
+    if [ $(($flags&  $FLAG_TAP_TEST)) -ne 0 ]; then
+      echo "1..0 # Skipped: Only valid on Linux hosts"
+    else
+      echo "This script will only run on Linux."
+    fi
+    exit 1;
+  fi
+
+  if [ $(($flags&  $FLAG_TAP_TEST)) -ne 0 ]; then
+    if [ "${LIBVIRT_URI}" != "qemu:///system" ]; then
+        echo "1..0 # Skipped: Only valid for Qemu system driver"
+        exit 0
+    fi
+
+    for name in `virsh list --all | awk '{print $2}'`
+    do
+      case ${name} in
+      tck*)
+        if [ "x${LIBVIRT_TCK_AUTOCLEAN}" = "x1" ] || \
+           [ $(($flags&  $FLAG_FORCE_CLEAN)) -ne 0 ]; then
+          res=$(virsh destroy  ${name} 2>&1)
+          rc1=$?
+          res=$(virsh undefine ${name} 2>&1)
+          rc2=$?
+          if [ $rc1 -ne 0 ]&&  [ $rc2 -ne 0 ]; then
+            echo "Bail out! Could not destroy VM ${name}: ${res}"
+            exit 0
+          fi
+        else
+          echo "Bail out! VM ${name} already exists, use --force to clean"
+          exit 1
+        fi
+      esac
+    done
+
+    for name in `virsh nwfilter-list | awk '{print $2}'`
+    do
+      case ${name} in
+      tck*)
+        if [ "x${LIBVIRT_TCK_AUTOCLEAN}" = "x1" ] || \
+           [ $(($flags&  $FLAG_FORCE_CLEAN)) -ne 0 ]; then
+          res=$(virsh nwfilter-undefine ${name} 2>&1)
+          if [ $? -ne 0 ]; then
+            echo "Bail out! Could not undefine filter ${name}: ${res}"
+            exit 1
+          fi
+        else
+          echo "Bail out! Filter ${name} already exists, use --force to clean"
+          exit 1
+        fi
+      esac
+    done
+  fi
+
+  if [ $(($flags&  $FLAG_LIBVIRT_TEST)) -ne 0 ]; then
+    curdir="${PWD}"
+    . test-lib.sh
+    if [ $? -ne 0 ]; then
+        exit 1
+    fi
+    test_intro $this_test
+    cd "${curdir}" || { echo "cd failed">&2; exit 1;}
+  fi
+
+  runTest "${flags}"
+
+  return 0
+}
+
+main "$@"
Index: libvirt-tck/scripts/nwfilter/concurrency/chg-vm-filter.sh
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/chg-vm-filter.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+cleanup()
+{
+	virsh nwfilter-undefine tck-vm${idx}-filter 2>/dev/null
+}
+
+cd $(dirname "$0")
+ctr=0
+[ -z "$2" ]&&  exit 1
+idx="$1"
+logfile="$2"
+rm -f "${logfile}"
+touch "${logfile}"
+
+trap cleanup 2
+
+while :;
+do
+	virsh nwfilter-define tck-vm${idx}-filter1.xml
+	[ $? -ne 0 ]&&  break
+	[ ! -w "${logfile}" ]&&  break
+	virsh nwfilter-define tck-vm${idx}-filter2.xml
+	[ $? -ne 0 ]&&  break
+	ctr=$(($ctr + 1))
+	[ ! -w "${logfile}" ]&&  break
+	echo "${ctr}">>  "${logfile}"
+done
+
+cleanup
Index: libvirt-tck/scripts/nwfilter/concurrency/start-destroy-vm.sh
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/start-destroy-vm.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+cleanup()
+{
+	virsh destroy tck-vm${idx} 2>/dev/null
+	virsh nwfilter-undefine tck-vm${idx}-filter 2>/dev/null
+}
+
+cd $(dirname "$0")
+ctr=0
+[ -z "$2" ]&&  exit 1
+idx="$1"
+logfile="$2"
+rm -f "${logfile}"
+touch "${logfile}"
+
+trap cleanup 2
+
+while :;
+do
+	virsh create tck-vm${idx}.xml
+	[ $? -ne 0 ]&&  break
+	sleep 2
+	virsh destroy tck-vm${idx}
+	[ $? -ne 0 ]&&  break
+	ctr=$(($ctr + 1))
+	[ ! -w "${logfile}" ]&&  break
+	echo "${ctr}">>  "${logfile}"
+done
+
+cleanup
Index: libvirt-tck/scripts/nwfilter/concurrency/tck-vm1-filter1.xml
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/tck-vm1-filter1.xml
@@ -0,0 +1,26 @@
+<filter name='tck-vm1-filter' chain='root'>
+<uuid>464d2617-43d0-7694-b479-320b72dac187</uuid>
+<filterref filter='clean-traffic'/>
+<rule action='accept' direction='in' priority='500'>
+<all comment='test'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<all/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='21' dstportend='22'/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='80'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<icmp/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<udp dstportstart='53'/>
+</rule>
+<rule action='drop' direction='inout' priority='500'>
+<all/>
+</rule>
+</filter>
+
Index: libvirt-tck/scripts/nwfilter/concurrency/tck-vm1-filter2.xml
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/tck-vm1-filter2.xml
@@ -0,0 +1,26 @@
+<filter name='tck-vm1-filter' chain='root'>
+<uuid>464d2617-43d0-7694-b479-320b72dac187</uuid>
+<filterref filter='clean-traffic'/>
+<rule action='accept' direction='in' priority='500'>
+<all comment='test again'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<all/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='21' dstportend='22'/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='80'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<icmp/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<udp dstportstart='53'/>
+</rule>
+<rule action='drop' direction='inout' priority='500'>
+<all/>
+</rule>
+</filter>
+
Index: libvirt-tck/scripts/nwfilter/concurrency/tck-vm1.xml
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/tck-vm1.xml
@@ -0,0 +1,30 @@
+<domain type='kvm'>
+<name>tck-vm1</name>
+<memory>32768</memory>
+<currentMemory>32768</currentMemory>
+<vcpu>1</vcpu>
+<os>
+<type>hvm</type>
+<boot dev='hd'/>
+</os>
+<features>
+<acpi/>
+<apic/>
+</features>
+<clock offset='utc'/>
+<on_poweroff>destroy</on_poweroff>
+<on_reboot>restart</on_reboot>
+<on_crash>destroy</on_crash>
+<devices>
+<interface type='bridge'>
+<source bridge='virbr0'/>
+<filterref filter='tck-vm1-filter'>
+</filterref>
+<target dev='tck-vm1-if0'/>
+</interface>
+<console type='pty'>
+</console>
+<input type='mouse' bus='ps2'/>
+<graphics type='vnc' port='-1' autoport='yes'/>
+</devices>
+</domain>
Index: libvirt-tck/scripts/nwfilter/concurrency/tck-vm2-filter1.xml
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/tck-vm2-filter1.xml
@@ -0,0 +1,26 @@
+<filter name='tck-vm2-filter' chain='root'>
+<uuid>364d2617-43d0-7694-b479-320b72dac187</uuid>
+<filterref filter='clean-traffic'/>
+<rule action='accept' direction='in' priority='500'>
+<all comment='another test'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<all/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='21' dstportend='22'/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='80'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<icmp/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<udp dstportstart='53'/>
+</rule>
+<rule action='drop' direction='inout' priority='500'>
+<all/>
+</rule>
+</filter>
+
Index: libvirt-tck/scripts/nwfilter/concurrency/tck-vm2-filter2.xml
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/tck-vm2-filter2.xml
@@ -0,0 +1,26 @@
+<filter name='tck-vm2-filter' chain='root'>
+<uuid>364d2617-43d0-7694-b479-320b72dac187</uuid>
+<filterref filter='clean-traffic'/>
+<rule action='accept' direction='in' priority='500'>
+<all comment='another test again'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<all/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='21' dstportend='22'/>
+</rule>
+<rule action='accept' direction='in' priority='500'>
+<tcp dstportstart='80'/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<icmp/>
+</rule>
+<rule action='accept' direction='out' priority='500'>
+<udp dstportstart='53'/>
+</rule>
+<rule action='drop' direction='inout' priority='500'>
+<all/>
+</rule>
+</filter>
+
Index: libvirt-tck/scripts/nwfilter/concurrency/tck-vm2.xml
===================================================================
--- /dev/null
+++ libvirt-tck/scripts/nwfilter/concurrency/tck-vm2.xml
@@ -0,0 +1,30 @@
+<domain type='kvm'>
+<name>tck-vm2</name>
+<memory>32768</memory>
+<currentMemory>32768</currentMemory>
+<vcpu>1</vcpu>
+<os>
+<type>hvm</type>
+<boot dev='hd'/>
+</os>
+<features>
+<acpi/>
+<apic/>
+</features>
+<clock offset='utc'/>
+<on_poweroff>destroy</on_poweroff>
+<on_reboot>restart</on_reboot>
+<on_crash>destroy</on_crash>
+<devices>
+<interface type='bridge'>
+<source bridge='virbr0'/>
+<filterref filter='tck-vm2-filter'>
+</filterref>
+<target dev='tck-vm2-if0'/>
+</interface>
+<console type='pty'>
+</console>
+<input type='mouse' bus='ps2'/>
+<graphics type='vnc' port='-1' autoport='yes'/>
+</devices>
+</domain>

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