# Copyright (c) 2009..2010 - RZ Uni Freiburg
# Copyright (c) 2008..2010 - OpenSLX GmbH
#
# This program/file is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your feedback to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org
#
# Script is included from init via the "." load function - thus it has all
# variables and functions available

# include default directories
. /etc/openslx.conf

CONFFILE=/initramfs/plugin-conf/qemukvm.conf
PLUGINCONFDIR=/mnt/${OPENSLX_DEFAULT_CONFDIR}/plugins/qemukvm
PLUGINDIR=${OPENSLX_DEFAULT_DIR}/plugin-repo/qemukvm
VIRTDIR=/mnt/${OPENSLX_DEFAULT_VIRTDIR}/qemukvm
LOGDIR=/mnt/${OPENSLX_DEFAULT_LOGDIR}

# check if the configuration file is available
if [ -e ${CONFFILE} ]; then

  # load needed variables
  . ${CONFFILE}

  # Test if this plugin is activated... more or less useless with the
  # new plugin system
  if [ ${qemukvm_active} -ne 0 2>/dev/null ]; then
    [ $DEBUGLEVEL -gt 0 ] && echo "executing the 'qemukvm' os-plugin ...";

    # load general configuration
    . /initramfs/machine-setup

    # copy virtualization include files and qemukvm.conf to config dir
    testmkd ${PLUGINCONFDIR}
    cp /mnt/${PLUGINDIR}/run-virt.include ${PLUGINCONFDIR}
    cp ${CONFFILE} ${PLUGINCONFDIR}

#    # check for the virtualization CPU features
#    if grep -q "vmx" /proc/cpuinfo &&  modprobe  ${MODPRV} kvm_intel ; then
#      [ $DEBUGLEVEL -gt 0 ] && echo "  * Loaded kvm_intel module"
#      echo "kvm=intel" >> ${PLUGINCONFDIR}/qemukvm.conf
#    elif grep -q "svm" /proc/cpuinfo && modprobe ${MODPRV} kvm_amd ; then
#      [ $DEBUGLEVEL -gt 0 ] && echo "  * Loaded kvm_amd module"
#      echo "kvm=amd" >> ${PLUGINCONFDIR}/qemukvm.conf
#    elif modprobe ${MODPRV} kqemu ; then
#      [ $DEBUGLEVEL -gt 0 ] && \
#      error "  * Successfully loaded the kqemu module, but loading of kvm_amd \
#or kvm_intel\n  failed, because no virtualization extenstion found in this \
#CPU. Please\n  enable the extension within your machines BIOS or get another \
#CPU." nonfatal
#    else
#      error "  * All module loading failed including the kqemu module, which \
#was either\n  not found or couldn't be loaded for other reasons. Thus using \
#qemu(-kvm)\n  makes not much sense." nonfatal
#    fi

#    # load the tunnel device module
#    modprobe tun 2>/dev/null

    # get source of qemukvm image server (get type, server and path)
    if strinstr "/" "${qemukvm_imagesrc}" ; then
      qkimgprot=$(uri_token ${qemukvm_imagesrc} prot)
      qkimgserv=$(uri_token ${qemukvm_imagesrc} server)
      qkimgpath="$(uri_token ${qemukvm_imagesrc} path)"
    fi
    if [ -n "${qkimgserv}" ] ; then
      # directory where qemu images are expected in
      mnttarget=/mnt/var/lib/virt/qemukvm
      # mount the qemukvm image source readonly (ro)
      fsmount ${qkimgprot} ${qkimgserv} ${qkimgpath} ${mnttarget} ro
    else
      [ $DEBUGLEVEL -gt 1 ] && error "  * Incomplete information in variable \
${qemukvm_imagesrc}." nonfatal
    fi

    # create a network configuration template (variables should be setable in
    # the future, see vmware plugin)
    natnetwork="192.168.101"
    honetwork="192.168.102"
    echo -e "nataddress=${natnetwork}.254/24\nhoaddress=${honetwork}.254/24" \
      >${PLUGINCONFDIR}/network.conf

    # copy the runlevel script (proper place for all distros??)
    cp /mnt/${PLUGINDIR}/qemukvm /mnt/etc/init.d
    chmod 0755 /mnt/etc/init.d/qemukvm
    rllinker "qemukvm" 22 2

    # copy the /etc/qemu-ifup script and enable extended rights for running
    # the emulator and certain network commands via sudo
    ln -sf ${PLUGINDIR}/ifup ${PLUGINCONFDIR}/ifup
    ln -sf ${PLUGINDIR}/ifdown ${PLUGINCONFDIR}/ifdown

    cat >> /mnt/etc/sudoers << EOF
# allow to start and stop kvm services / load-/unload kvm modules
#ALL ALL=NOPASSWD: /etc/init.d/qemukvm
ALL ALL=NOPASSWD: /opt/openslx/uclib-rootfs/sbin/tunctl -t tap*
ALL ALL=NOPASSWD: /opt/openslx/uclib-rootfs/usr/sbin/brctl addif br0 tap*
ALL ALL=NOPASSWD: /opt/openslx/uclib-rootfs/bin/ip link set dev tap* up
ALL ALL=NOPASSWD: /opt/openslx/uclib-rootfs/bin/ip addr add * dev tap*
ALL ALL=NOPASSWD: /opt/openslx/uclib-rootfs/usr/sbin/udhcpd -S /tmp/qemukvm/*/udhcpd.conf
ALL ALL=NOPASSWD: /opt/openslx/uclib-rootfs/bin/cp /tmp/qemukvm/*/forwarding /proc/sys/net/ipv4/conf/tap*/forwarding
#ALL ALL=NOPASSWD: ${killall} udhcpd
EOF
  fi
else
  [ $DEBUGLEVEL -gt 0 ] && echo "  * Configuration of 'qemukvm' plugin failed"
fi