# run-virt.include
# -----------------------------------------------------------------------------
# Copyright (c) 2010 - RZ Uni Freiburg
# Copyright (c) 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
# -----------------------------------------------------------------------------
# run-virt.include
#    - Include script for running Xen on an OpenSLX client via the run-virt.sh
#      or run-vmgrid.sh
################################################################################

################################################################################
### Include general configuration
################################################################################
if [ -f ${OPENSLX_DEFAULT_CONFDIR}/plugins/${self}/${self}.conf ]; then
  . ${OPENSLX_DEFAULT_CONFDIR}/plugins/${self}/${self}.conf
else
  writelog "Problems reading config file of ${self} plugin"
  exit 1
fi

################################################################################
### Declaration of default variables
################################################################################

PLUGINCONFXEN="${PLUGINCONFROOT}/${self}"
# create TMPDIR for all users
mkdir -m 1777 /tmp/${self} 2>/dev/null
# dir for configs
confdir="/tmp/${self}/${USER}/${VM_ID}"
# use vm_shortname for VM name since vm_name can be very long
# add id so we can start more tahn one of the same image
vm_name="${vm_shortname}-${VM_ID}"
conffile=${confdir}/${vm_name}
# define dirs and files which can be removed after exit, be carefull!
rm -rf ${confdir} 2>/dev/null
mkdir -p ${confdir} 2>/dev/null

xen_kernel=${kernel:-"/boot/vmlinuz-xen"}
xen_ramdisk=${initramfs:-"/boot/initrd-xen"}
xen_extra="xencons=tty 3"
[ -n "${imgname}" ] &&  xen_disk="disk = [ 'file:${vmpath},hda1,r' ]"

writelog "Directories:"
writelog "\tConfig dir:\t\t$confdir"

################################################################################
### Hardware checks
################################################################################

# memory part equal to vmware plugin
# percentage of memory to use for virtualbox in standard case
if [ -n "${forcemem}" ]; then
  mem="${forcemem}"
else
  permem=30
  if [ "${totalmem}" -ge "1600" ]; then
    permem=40
  fi
  # check if /tmp is on harddisk
  if grep -qe "/dev/.* /tmp " /proc/mounts ; then
    permem=60
    id44="1"
    # Hack, if more than 2,5G RAM use 40% of Ram and write vmem into Ram as well
    # (40% vmware | 40% confdir(vmem...) | 20% host
    # VMplayer 2+ issue
    # TODO: makes this sense for vbox?
    #if [ "${totalmem}" -ge "2500" ]; then
      #permem=40
      #rmdir ${snapshotdir}
      #snapshotdirold=${snapshotdir}
      #snapshotdir=/dev/shm/${self}/${USER}/${VM_ID}
      #mkdir -p ${snapshotdir}
      #ln -sf ${snapshotdir} ${snapshotdirold}
    #fi
  fi
  mem=$(expr ${totalmem} / 100 \* ${permem})
  if [ "${id44}" = "1" ]; then
    memhost=$(expr ${totalmem} - ${mem})
  else
    memhost=$(expr ${totalmem} - ${mem} - ${mem})
  fi
  #permem=40
  #mem=$(expr ${totalmem} * ${permem})
  if [ "${mem}" -lt "256" ] || [ "${memhost}" -lt "256" ]; then
    writelog "Memory out of range: ${mem} MB (guest) / ${memhost} MB (host)!"
    writelog "Min. 256 MB for host and guest!"
    exit 1
  fi
fi

# translate network kinds (nat, bridged, host-only)
case "${network_kind}" in
  bridge*)
    xen_vif="mac=$macaddr, bridge=br0"
  ;;
  *)
    xen_vif="mac=$macaddr"
esac
xen_dhcp="dhcp" # off

# translate boot, use if set else set to disk
xen_root=/dev/hda1
case ${boot} in
  n*|tftp)
    pxe_label=$(grep -o 'pxe_label param=.*"' ${xmlfile} \
                | sed -e "s/&.*;/; /g" | awk -F '"' '{print $2}')
    pxe_label=$(grep -A 3 "^LABEL *${pxe_label}" \
                ${xen_tftpdir}/pxelinux.cfg/default 2>/dev/null \
                | grep "^ *KERNEL ")
    if [ -n "${pxe_label}" ] && [ -n "${xen_tftpdir}" ]; then
      xen_root=/dev/nfs
      xen_kernel="${xen_tftpdir}/$(echo ${pxe_label} \
                  | awk -F " --- " '{print $2}' | awk '{print $1}')"
      xen_ramdisk="${xen_tftpdir}/$(echo ${pxe_label} \
                   | awk -F " --- " '{print $3}')"
    fi
  ;;
  # later maybe c|disk|hd*|sd*) for HD and d|cd*) for CD-ROM
  *)
    xen_root=/dev/hda1
  ;;
esac

[ ${diskless} -eq 0 ] && writelog "Diskimage:"
[ ${diskless} -eq 0 ] && writelog "\tMachine diskfile:\t$vmpath"
writelog "Virtual Hardware:"
writelog "\tGuest RAM:\t\t${mem} MB"
# echo nur wenn memhost gesetzt
[ -n "${memhost}" ] && writelog "\tHost RAM:\t\t${memhost} MB"
writelog "\tMAC address:\t\t$macaddr"

################################################################################
### Pepare and configure virtual machine and disk image
################################################################################

. ${PLUGINCONFXEN}/machine.include > ${conffile}

################################################################################
### finally set env for run-virt.sh
################################################################################

# set the variables appropriately (several interfaces with different names)
VIRTCMD=$(which xm 2>/dev/null)
# '-c' for console, no graphical output available, later vnc possible
VIRTCMDOPTS="create -c ${conffile}"

# set headless mode
VIRTCMDHL=$(which xm 2>/dev/null)
VIRTCMDOPTSHL="create ${conffile}"