#!/bin/bash
# IBM(c) 2013, 2015 EPL license http://www.eclipse.org/legal/epl-v10.html

###############################################################################
# This script is used to handle xCAT disk initialization and configuration(eg.
# attach/detach a SCSI volume, add an additional ephemeral disk when vm is in
# inactive status). It will be invoked and executed when vm start up.
###############################################################################
version=3.0

function getOsVersion {
  # @Description:
  #   Returns the Linux distro version in an easy to parse format.
  # @Input:
  #   None
  # @Output:
  #   os - Variable set with OS and version information.  For example:
  #        "rhel62" or "sles11sp2"
  # @Code:
  if [[ -e "/etc/os-release" ]]; then
    os=`cat /etc/os-release | grep "^ID=" | sed \
      -e 's/ID=//' \
      -e 's/"//g'`
    version=`cat /etc/os-release | grep "^VERSION_ID=" | sed \
      -e 's/VERSION_ID=//' \
      -e 's/"//g' \
      -e 's/\.//'`
    os=$os$version

  #The /etc/SuSE-release file will be deprecated in sles11.4 and later release
  elif [[ -e "/etc/SuSE-release" ]]; then
    os='sles'
    version=`cat /etc/SuSE-release | grep "VERSION =" | sed \
      -e 's/^.*VERSION =//' \
      -e 's/\s*$//' \
      -e 's/.//' \
      -e 's/[^0-9]*([0-9]+).*/$1/'`
    os=$os$version

    # Append service level
    level=`echo "/etc/SuSE-release" | grep "LEVEL =" | sed \
      -e 's/^.*LEVEL =//' \
      -e 's/\s*$//' \
      -e 's/.//' \
      -e 's/[^0-9]*([0-9]+).*/$1/'`
    os=$os'sp'$level

  #The /etc/redhat-release file will be deprecated in rhel7 and later release
  elif [[ -e "/etc/redhat-release" ]]; then
    os='rhel'
    version=`cat /etc/redhat-release | grep -i "Red Hat Enterprise Linux Server" | sed \
      -e 's/[A-Za-z\/\.\(\)]//g' \
      -e 's/^ *//g' \
      -e 's/ *$//g' \
      -e 's/\s.*$//'`
    os=$os$version
  fi
  return
}

function onlineDevice {
  # @Description:
  #   Brings a Linux device online.
  # @Input:
  #   Device number, e.g. "0.0.000c"
  # @Output:
  #   Return code indicates success or failure
  # @Code:
  device=$1
  local funcName="onlineDevice"
  rc=$(/sbin/chccwdev -e $device > /dev/null; echo $?)
  if (( rc != 0 )); then
    if [[ -e /sbin/cio_ignore ]]; then
      rc=$(/sbin/cio_ignore -r 0.0.$device > /dev/null; echo $?)
      which udevadm &> /dev/null && udevadm settle || udevsettle
    fi
    rc=$(/sbin/chccwdev -e $device > /dev/null; echo $?)
    if (( rc != 0 )); then
      echo "$funcName (Error) Could not activate the virtual device $device"
      return 1
    fi
  fi
  which udevadm &> /dev/null && udevadm settle || udevsettle
  return 0
}

function setupDisk {
  # @Description:
  #   Processes a disk file for the following functions:
  #     Create a file system node
  #     Remove a file system node
  #     Setup a SCSI volume
  #     Removes a SCSI volume
  #     Add a mdisk based ephemeral disk
  # @Input:
  #   Disk handling parameters
  # @Output:
  #   None
  # @Code:
  local funcName="setupDisk"

  # Parse the parameter from parameter list
  for parameter in $@; do
    keyName=${parameter%\=*}
    value=${parameter#*\=}
    value=$(echo ${value} | sed -e 's/^ *//g')
    newKey='xcat_'$keyName
    eval $newKey=$value
  done

  # Remove the invokeScript.sh file after we have read it
  rm -f invokeScript.sh

  ##########################################################################
  # Handle creating a file system node
  # Disk handler input parameters:
  #   action - "createfilesysnode"
  #   srcFile - location/name of the source file for the mknod command
  #   xcat_tgtFile - location/name of the target file for the mknod command
  ##########################################################################
  if [[ $xcat_action == "createfilesysnode" ]]; then
    echo "Creating a file system node, source: $xcat_srcFile, target: $xcat_tgtFile"

    if [[ ! -n $xcat_srcFile ]]; then
      echo "$funcName (Error) Source file for creating a file system node was not specified"
      return
    fi

    if [[ ! -n $xcat_tgtFile ]]; then
      echo "$funcName (Error) Target file for creating a file system node was not specified"
      return
    fi
    if [[ -e $xcat_tgtFile ]]; then
      echo "$funcName (Error) Target file for creating a file system node already exists"
      return
    fi

    configFile='/etc/udev/rules.d/56-zfcp.rules'
    # Create udev config file if not exist
    if [[ ! -e $configFile ]]; then
      touch $configFile
      if [[ $os == rhel* ]]; then
        echo "KERNEL==\"zfcp\", RUN+=\"/sbin/zfcpconf.sh\"" >> ${configFile}
        echo "KERNEL==\"zfcp\", RUN+=\"/sbin/multipath -r\"" >> ${configFile}
      fi
    fi

    tgtNode=$(echo ${xcat_tgtFile} | sed -e 's/^\/dev\///')
    if [[ $os == sles* || $os == rhel* ]]; then
      wwpn_lun=$(echo ${xcat_srcFile} | sed -e 's/^\/dev.*-zfcp-//')
      wwpn=$(echo ${wwpn_lun} | sed -e 's/:0x.*//')
      lun=$(echo ${wwpn_lun} | sed -e 's/^0x.*://')
    else
      wwpn_lun=$(echo ${xcat_srcFile} | sed -e 's/^\/dev.*-fc-//')
      wwpn=$(echo ${wwpn_lun} | sed -e 's/-lun-.*//')
      lun=$(echo ${wwpn_lun} | sed -e 's/^0x.*-lun-//')
    fi


    multipath=0
    out=`echo $wwpn | grep ","`
    if [[ -n "$out" ]]; then
      multipath=1
    fi

    if [[ $os == sles* || $os == rhel* ]]; then
      fcp=$(echo ${xcat_srcFile} | sed -e 's/^\/dev.*ccw-0.0.//' | sed -e 's/-zfcp-.*$//')
    else
      fcp=$(echo ${xcat_srcFile} | sed -e 's/^\/dev.*ccw-0.0.//' | sed -e 's/-fc-.*$//')
    fi
    oldIFS=$IFS
    IFS=","
    fcpList=($fcp)
    for fcp in ${fcpList[@]}
    do
      if [[ $multipath == 1 ]]; then
        # Find the name of the multipath device by arbitrary one path in the set
        wwpnList=($wwpn)
        for wwpn in ${wwpnList[@]}
        do
          if [[ ${wwpn:0:2} -ne "0x" ]]; then
            wwpn="0x$wwpn"
          fi
          if [[ $os == sles* || $os == rhel* ]]; then
            cur_wwpn_lun=${wwpn}:${lun}
            srcFile=$(echo ${xcat_srcFile} | sed -e 's/-zfcp-.*//')"-zfcp-"$cur_wwpn_lun
            srcFile=$(echo ${srcFile} | sed -e 's/ccw-.*-zfcp/ccw-0.0.'$fcp'-zfcp/')
          else
            cur_wwpn_lun=${wwpn}-lun-${lun}
            srcFile=$(echo ${xcat_srcFile} | sed -e 's/-fc-.*//')"-fc-"$cur_wwpn_lun
            srcFile=$(echo ${srcFile} | sed -e 's/ccw-.*-fc/ccw-0.0.'$fcp'-fc/')
          fi

          out=`/usr/bin/stat --printf=%n ${srcFile}`
          if (( $? != 0 )); then
            echo "$funcName (Error) Unable to stat the source file: $srcFile"
            continue
          fi

          out=`/sbin/udevadm info --query=all --name=$srcFile | grep ID_SERIAL=`
          devName=$(echo ${out} | sed -e 's/^E:\s//')
          multipathUuid=$(echo $devName | sed -e 's/ID_SERIAL=//')
          if [[ -n "$multipathUuid" ]]; then
            break
          fi
        done

        if [[ -z "$multipathUuid" ]]; then
            echo "$funcName (Error) Building up multipath failed!"
            return
        fi
      else
        if [[ $os == sles* || $os == rhel* ]]; then
          srcFile=$(echo ${xcat_srcFile} | sed -e 's/ccw-.*-zfcp/ccw-0.0.'$fcp'-zfcp/')
        else
          srcFile=$(echo ${xcat_srcFile} | sed -e 's/ccw-.*-zfcp/ccw-0.0.'$fcp'-fc/')
        fi
        out=`/usr/bin/stat --printf=%n ${srcFile}`
        if (( $? != 0 )); then
          echo "$funcName (Error) Unable to stat the source file: $xcat_srcFile"
          return
        fi
      fi
    done
    IFS=$oldIFS

    # Add the entry into udev config file
    if [[ $multipath == 1 ]]; then
      echo "KERNEL==\"dm*\", ENV{DM_UUID}==\"mpath-${multipathUuid}\", SYMLINK+=\"${tgtNode}\"" >> ${configFile}
      udevadm control --reload
      udevadm trigger --sysname-match=dm-*
    else
      echo "KERNEL==\"sd*\", ATTRS{wwpn}==\"${wwpn}\", ATTRS{fcp_lun}==\"${lun}\", SYMLINK+=\"${tgtNode}%n\"" >> ${configFile}
      udevadm control --reload
      udevadm trigger --sysname-match=sd*
    fi

  echo "$funcName successfully create the file system node ${xcat_tgtFile}"

  ##########################################################################
  # Handle removing a file system node
  # Disk file input parameters:
  #   action - "removefilesysnode"
  #   tgtFile - location/name of the target file for the mknod command
  ##########################################################################
  elif [[ $xcat_action == "removefilesysnode" ]]; then
    echo "Removing a file system node, target: $xcat_tgtFile"
    if [[ ! -n $xcat_tgtFile ]]; then
      echo "$funcName (Error) Target file for creating a file system node was not specified"
      return
    fi

    configFile='/etc/udev/rules.d/56-zfcp.rules'
    tgtNode=$(echo ${xcat_tgtFile} | sed -e 's/^\/dev\///')

    sed -i -e /SYMLINK+=\"${tgtNode}%n\"/d ${configFile}
    sed -i -e /SYMLINK+=\"${tgtNode}\"/d ${configFile}
    udevadm control --reload
    udevadm trigger --sysname-match=sd*
    udevadm trigger --sysname-match=dm-*
    echo "$funcName successfully remove the file system node ${xcat_tgtFile}"

  ##########################################################################
  # Handle adding a SCSI volume
  # Disk file input parameters:
  #   action - "addScsiVolume"
  #   fcpAddr - FCP device address
  #   wwpn - WWPN number
  #   lun - LUN number
  ##########################################################################
  elif [[ $xcat_action == "addScsiVolume" ]]; then
    echo "Adding a SCSI Volume, FCP addr: $xcat_fcpAddr, WWPN: $xcat_wwpn, LUN: $xcat_lun"

    # Validate the input
    if [[ ! -n $xcat_fcpAddr ]]; then
      echo "$funcName (Error) FCP address was not specified"
      return
    fi
    xcat_fcpAddr=`echo $xcat_fcpAddr | tr '[A-Z]' '[a-z]'`

    if [[ ! -n $xcat_wwpn ]]; then
      echo "$funcName (Error) WWPN was not specified"
      return
    fi
    xcat_wwpn=`echo $xcat_wwpn | tr '[A-Z]' '[a-z]'`

    if [[ ! -n $xcat_lun ]]; then
      echo "$funcName (Error) LUN was not specified"
      return
    fi
    xcat_lun=`echo $xcat_lun | tr '[A-Z]' '[a-z]'`
    decimal_lun=$((16#${xcat_lun:0:4}))

    # Online the device
    oldIFS=$IFS
    IFS=","
    fcp_list=($xcat_fcpAddr)
    for fcp in ${fcp_list[@]}
    do
      rc= onlineDevice $fcp
      if (( rc != 0 )); then
        return
      fi
      if [[ $os == sles12* ]]; then
        out=`cat /boot/zipl/active_devices.txt | grep -i "0.0.$fcp"`
        if [[ -z $out ]]; then
          /sbin/zfcp_host_configure 0.0.$fcp 1
        fi
      elif [[ $os == sles11* ]]; then
        /sbin/zfcp_host_configure 0.0.$fcp 1
      elif [[ $os == ubuntu* ]]; then
        /sbin/chzdev zfcp-host $fcp -e
      fi
    done

    multipath=0
    out=`echo $xcat_wwpn | grep ","`
    if [[ -n "$out" ]]; then
      multipath=1
    fi

    # Start multipathd service
    if [[ $multipath == 1 ]]; then
        if [[ $os == sles* ]]; then
            insserv multipathd
        elif [[ $os == rhel6* ]]; then
            chkconfig multipathd on
        else
            systemctl enable multipathd
        fi
        modprobe dm-multipath
    fi

    for fcp in ${fcp_list[@]}
    do
      wwpn_list=($xcat_wwpn)
      for wwpn in ${wwpn_list[@]}
      do
        # Set WWPN and LUN in sysfs
        echo 0x$xcat_lun > /sys/bus/ccw/drivers/zfcp/0.0.$fcp/0x$wwpn/unit_add

        # Set WWPN and LUN in configuration files
        if [[ $os == sles* ]]; then
          #   SLES: /etc/udev/rules.d/51-zfcp*
          /sbin/zfcp_disk_configure 0.0.$fcp $wwpn $xcat_lun 1

          # Configure zFCP device to be persistent
          touch /etc/udev/rules.d/51-zfcp-0.0.$fcp.rules

          # Check if the file already contains the zFCP channel
          out=`cat "/etc/udev/rules.d/51-zfcp-0.0.$fcp.rules" | egrep -i "ccw/0.0.$fcp]online"`
          if [[ ! $out ]]; then
            echo "ACTION==\"add\", SUBSYSTEM==\"ccw\", KERNEL==\"0.0.$fcp\", IMPORT{program}=\"collect 0.0.$fcp %k 0.0.$fcp zfcp\"" \
              | tee -a /etc/udev/rules.d/51-zfcp-0.0.$fcp.rules
            echo "ACTION==\"add\", SUBSYSTEM==\"drivers\", KERNEL==\"zfcp\", IMPORT{program}=\"collect 0.0.$fcp %k 0.0.$fcp zfcp\"" \
              | tee -a /etc/udev/rules.d/51-zfcp-0.0.$fcp.rules
            echo "ACTION==\"add\", ENV{COLLECT_0.0.$fcp}==\"0\", ATTR{[ccw/0.0.$fcp]online}=\"1\"" \
              | tee -a /etc/udev/rules.d/51-zfcp-0.0.$fcp.rules
          fi

          echo "ACTION==\"add\", KERNEL==\"rport-*\", ATTR{port_name}==\"0x$wwpn\", SUBSYSTEMS==\"ccw\", KERNELS==\"0.0.$fcp\", ATTR{[ccw/0.0.$fcp]0x$wwpn/unit_add}=\"0x$xcat_lun\"" \
            | tee -a /etc/udev/rules.d/51-zfcp-0.0.$fcp.rules
        elif [[ $os == rhel* ]]; then
          #   RHEL: /etc/zfcp.conf
          echo "0.0.$fcp 0x$wwpn 0x$xcat_lun" >> /etc/zfcp.conf
          echo "add" > /sys/bus/ccw/devices/0.0.$fcp/uevent
        elif [[ $os == ubuntu* ]]; then
          #   Ubuntu: chzdev zfcp-lun 0.0.$device:0x$wwpn:0x$lun -e
          /sbin/chzdev zfcp-lun 0.0.$fcp:0x$wwpn:0x$xcat_lun -e
        fi

        # Settle the file system so when we are done the device is fully available
        if [[ $(which udevadm 2> /dev/null) != '' ]]; then
          udevadm settle
        else
          udevsettle
        fi
        if [[ $os == rhel* || $os == sles* ]]; then
          if [[ ! -e "/dev/disk/by-path/ccw-0.0.${fcp}-zfcp-0x${wwpn}:0x${xcat_lun}" ]]; then
            # Sometimes the file takes longer to appear.  We will wait up to 3 minutes.
            maxTime=0
            for time in 1 2 2 5 10 10 30 60 60
            do
              if [[ -e "/dev/disk/by-path/ccw-0.0.${fcp}-zfcp-0x${wwpn}:0x${xcat_lun}" ]]; then
                # Leave the loop now that the file exists
                break
              fi
              maxTime=$maxTime+$time
              echo "Sleeping for $time seconds to allow /dev/disk/by-path/ccw-0.0.${fcp}-zfcp-0x${wwpn}:0x${xcat_lun} to be created"
              sleep $time
            done
          fi
          if [[ ! -e "/dev/disk/by-path/ccw-0.0.${fcp}-zfcp-0x${wwpn}:0x${xcat_lun}" ]]; then
            echo "/dev/disk/by-path/ccw-0.0.${fcp}-zfcp-0x${wwpn}:0x${xcat_lun} did not appear in $maxTime seconds, continuing."
          fi
        elif [[ $os == ubuntu* ]]; then
          if [[ ! -e "/dev/disk/by-path/ccw-0.0.${fcp}-fc-0x${wwpn}-lun-${decimal_lun}" ]]; then
            # Sometimes the file takes longer to appear.  We will wait up to 3 minutes.
            maxTime=0
            for time in 1 2 2 5 10 10 30 60 60
            do
              if [[ -e "/dev/disk/by-path/ccw-0.0.${fcp}-fc-0x${wwpn}-lun-${decimal_lun}" ]]; then
                # Leave the loop now that the file exists
                break
              fi
              maxTime=$maxTime+$time
              echo "Sleeping for $time seconds to allow /dev/disk/by-path/ccw-0.0.${fcp}-fc-0x${wwpn}-lun-${decimal_lun} to be created"
              sleep $time
            done
          fi
          if [[ ! -e "/dev/disk/by-path/ccw-0.0.${fcp}-fc-0x${wwpn}-lun-${decimal_lun}" ]]; then
            echo "/dev/disk/by-path/ccw-0.0.${fcp}-fc-0x${wwpn}-lun-${decimal_lun} did not appear in $maxTime seconds, continuing."
          fi
        fi
      done
    done
    IFS=$oldIFS

    /sbin/multipath -r

  echo "$funcName successfully create the SCSI volume"


  ##########################################################################
  # Handle removing a SCSI volume
  # Disk file input parameters:
  #   action - "removeScsiVolume"
  #   fcpAddr - FCP device address
  #   wwpn - WWPN number
  #   lun - LUN number
  ##########################################################################
  elif [[ $xcat_action == "removeScsiVolume" ]]; then
    echo "Removing a SCSI Volume, FCP addr: $xcat_fcpAddr, WWPN: $xcat_wwpn, LUN: $xcat_lun"

    # Validate the input
    if [[ ! -n $xcat_fcpAddr ]]; then
      echo "$funcName (Error) FCP address was not specified"
      return
    fi
    xcat_fcpAddr=`echo $xcat_fcpAddr | tr '[A-Z]' '[a-z]'`

    if [[ ! -n $xcat_wwpn ]]; then
      echo "$funcName (Error) WWPN was not specified"
      return
    fi
    xcat_wwpn=`echo $xcat_wwpn | tr '[A-Z]' '[a-z]'`

    if [[ ! -n $xcat_lun ]]; then
      echo "$funcName (Error) LUN was not specified"
      return
    fi
    xcat_lun=`echo $xcat_lun | tr '[A-Z]' '[a-z]'`

    oldIFS=$IFS
    IFS=","
    fcp_list=($xcat_fcpAddr)
    for fcp in ${fcp_list[@]}
    do
      wwpn_list=($xcat_wwpn)
      for wwpn in ${wwpn_list[@]}
      do
        # Delete the SCSI device
        scsiDevice=`lszfcp -l 0x$xcat_lun | grep 0x$wwpn | cut -d " " -f2`
        if [[ -n $scsiDevice ]]; then
          echo 1 > "/sys/bus/scsi/devices/$scsiDevice/delete"
        fi

        # Delete WWPN and LUN from sysfs
        if [[ -e /sys/bus/ccw/drivers/zfcp/0.0.$fcp/0x$wwpn/unit_remove ]]; then
          if [[ $(which udevadm 2> /dev/null) != '' ]]; then
            udevadm settle
          else
            udevsettle
          fi
          echo 0x$xcat_lun > /sys/bus/ccw/drivers/zfcp/0.0.$fcp/0x$wwpn/unit_remove
        fi

        # Delete WWPN and LUN from configuration files
        if [[ $os == sles11* || $os == sles12* ]]; then
          #   SLES: /etc/udev/rules.d/51-zfcp*
          expression="/$xcat_lun/d"
          sed --in-place -e $expression /etc/udev/rules.d/51-zfcp-0.0.$fcp.rules
        elif [[ $os == rhel* ]]; then
          #   RHEL: /etc/zfcp.conf
          expression="/$xcat_lun/d"
          sed --in-place -e $expression /etc/zfcp.conf
        elif [[ $os == ubuntu* ]]; then
          #   Ubuntu: chzdev zfcp-lun 0.0.$device:0x$wwpn:0x$lun -d
          /sbin/chzdev zfcp-lun 0.0.$fcp:0x$wwpn:0x$xcat_lun -d
        fi
      done
    done
    IFS=$oldIFS
    /sbin/multipath -W
    /sbin/multipath -r
    echo "$funcName successfully remove the SCSI volume"

  ###########################################################################
  # Handle adding a mdisk based swap disk.
  # Disk file input parameters:
  #   action  - "addSwap"
  #   vaddr   - virtual address of the minidisk
  ##########################################################################
  elif [[ $xcat_action == "addSwap" ]]; then

    if [[ ! -n $xcat_vaddr ]]; then
      echo "$funcName (Error) Virtual address was not specified"
      return
    fi

    xcat_vaddr=`echo $xcat_vaddr | tr '[A-Z]' '[a-z]'`

    # Online the device
    rc= onlineDevice $xcat_vaddr
    if (( rc != 0 )); then
      echo "$funcName (Error) fail to online the disk $xcat_vaddr"
      return
    fi

    # Configure the added dasd to be persistent
    echo "Permanently online the ephemeral disk"
    if [[ $os == rhel* ]]; then
      out=`cat "/etc/dasd.conf" | egrep -i $xcat_vaddr`
      if [[ ! $out ]]; then
        echo "0.0.$xcat_vaddr" >> /etc/dasd.conf
      fi
    elif [[ $os == sles* ]]; then
      /sbin/dasd_configure 0.0.$xcat_vaddr 1
    elif [[ $os == ubuntu16* ]]; then
      touch /etc/sysconfig/hardware/config-ccw-0.0.$xcat_vaddr
    else
      echo "$funcName (Error) failed to permanently online the disk:$xcat_vaddr on os: $os, please check if $os is in the supported distribution list"
      return
    fi

    cp /etc/fstab /etc/fstab.bak
    out=`cat "/etc/fstab" | egrep -i "ccw-0.0.$xcat_vaddr"`
    if [[  $out ]]; then
      sed -i '/ccw-0.0.'"$xcat_vaddr"'/d' /etc/fstab
    fi

    # any error should be recorded in the init log, this kind of error should not break
    # the whole startup process
    mkswap /dev/disk/by-path/ccw-0.0.${xcat_vaddr}-part1
    echo "/dev/disk/by-path/ccw-0.0.${xcat_vaddr}-part1 none swap sw 0 0" >> /etc/fstab

    swapon -a

  ###########################################################################
  # Handle adding a mdisk based ephemeral disk.
  # Disk file input parameters:
  #   action  - "addMdisk"
  #   vaddr   - virtual address of the minidisk
  #   filesys - Filesystem type
  #   mntdir - The directory that mount the mdisk to
  ##########################################################################
  elif [[ $xcat_action == "addMdisk" ]]; then
    echo "Adding a minidisk based ephemeral disk, Vaddr: $xcat_vaddr, Filesystem: $xcat_filesys mountpoint:$xcat_mntdir"

    # Validate the input
    if [[ ! -n $xcat_vaddr ]]; then
      echo "$funcName (Error) Virtual address was not specified"
      return
    fi
    xcat_vaddr=`echo $xcat_vaddr | tr '[A-Z]' '[a-z]'`

    # Online the device
    rc= onlineDevice $xcat_vaddr
    if (( rc != 0 )); then
      echo "$funcName (Error) fail to online the disk $xcat_vaddr"
      return
    fi

    # Configure the added dasd to be persistent
    echo "Permanently online the ephemeral disk"
    if [[ $os == rhel* ]]; then
      out=`cat "/etc/dasd.conf" | egrep -i $xcat_vaddr`
      if [[ ! $out ]]; then
        echo "0.0.$xcat_vaddr" >> /etc/dasd.conf
      fi
    elif [[ $os == sles* ]]; then
      /sbin/dasd_configure 0.0.$xcat_vaddr 1
    elif [[ $os == ubuntu16* ]]; then
      touch /etc/sysconfig/hardware/config-ccw-0.0.$xcat_vaddr
    else
      echo "$funcName (Error) failed to permanently online the disk:$xcat_vaddr on os: $os, please check if $os is in the supported distribution list"
      return
    fi


    # Mount the mdisk to the specified mount point
    echo "Mounting the ephemeral disk $xcat_vaddr to directory $xcat_mntdir"
    if [[ -d $xcat_mntdir ]]; then
      rm -rf $xcat_mntdir
    fi
    mkdir -p $xcat_mntdir

    cp /etc/fstab /etc/fstab.bak
    out=`cat "/etc/fstab" | egrep -i "ccw-0.0.$xcat_vaddr"`
    if [[  $out ]]; then
      sed -i '/ccw-0.0.'"$xcat_vaddr"'/d' /etc/fstab
    fi

    if [[ $os == sles12* ]]; then
      echo "/dev/disk/by-path/ccw-0.0.${xcat_vaddr}-part1 $xcat_mntdir $xcat_filesys defaults,nofail 0 0" >> /etc/fstab
    else
      echo "/dev/disk/by-path/ccw-0.0.${xcat_vaddr}-part1 $xcat_mntdir $xcat_filesys defaults 0 0" >> /etc/fstab
    fi

    out=`mount -a 2>&1`
    if [[ "$out" ]]; then
      echo "Fail to mount the disk $xcat_vaddr with reason $out"
      mv /etc/fstab.bak /etc/fstab
      mount -a
    else
      echo "The disk $xcat_vaddr has been mounted to $xcat_mntdir in format $xcat_filesys successfully"
    fi

  fi

  return
}

############################################################################
# Main Code Section
############################################################################
# Get Linux version
getOsVersion
setupDisk $@
rm -f setupDisk