#!/bin/bash
set -e

export LIBVIRT_DEFAULT_URI=lxc:///
DOMAIN=sl

function cleanup () {
  set +x
  echo "Running cleanup"
  echo 0 > /sys/kernel/debug/tracing/events/cgroup/enable
  virsh -c lxc:/// destroy sl || true
  if [ -n "$SUCCESS" ]; then
    echo "Finished succesfully"
  else
    echo "Got an error."
  fi
}

trap cleanup exit

cat <<EOF >dom.xml
<domain type='lxc'>
  <name>sl</name>
  <memory unit='KiB'>256000</memory>
  <currentMemory unit='KiB'>256000</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type>exe</type>
    <init>/bin/bash</init>
  </os>
  <features>
    <privnet/>
  </features>
  <clock offset='utc'/>
  <devices>
    <filesystem type='mount' accessmode='passthrough'>
      <source dir='/'/>
      <target dir='/'/>
    </filesystem>
    <console type='pty'>
      <target type='lxc' port='0'/>
    </console>
  </devices>
</domain>
EOF
virsh define dom.xml || true

echo 1 > /sys/kernel/debug/tracing/events/cgroup/enable
# Restart systemd, this triggers the problem
echo "systemctl deamon-reload start" > /sys/kernel/debug/tracing/trace_marker
systemctl daemon-reload
echo "systemctl deamon-reload finished" > /sys/kernel/debug/tracing/trace_marker

set -x
# Start the lxc container
echo "virsh start ${DOMAIN} start" > /sys/kernel/debug/tracing/trace_marker
virsh start ${DOMAIN}
echo "virsh start ${DOMAIN} finished" > /sys/kernel/debug/tracing/trace_marker

virsh list
PID=$(virsh -c lxc:/// list --state-running | sed -ne 's/ \([0-9]\+\) .*/\1/p')
WATCH=/proc/$PID/cgroup
echo "Before ${WATCH}"
cat ${WATCH}
sleep 1

# Restart libvirtd
echo "sysemctl stop libvirtd start" > /sys/kernel/debug/tracing/trace_marker
systemctl stop libvirtd
echo "sysemctl stop libvirtd finished" > /sys/kernel/debug/tracing/trace_marker

echo "sysemctl start libvirtd start" > /sys/kernel/debug/tracing/trace_marker
systemctl start libvirtd
echo "sysemctl start libvirtd finished" > /sys/kernel/debug/tracing/trace_marker

# Check if container is still there
echo "After"
cat ${WATCH}
if ! virsh list | grep -qs "${DOMAIN}[[:space:]]\+running"; then
  echo 'Domain disappeared!'
  exit 1
fi
SUCCESS=1