#!/usr/bin/env bash
set -eu

BOOT="$IMG/boot.img"
[ ! -f "$BOOT" ] && echo "ERROR: Boot image does not exist ($BOOT)" && exit 81

DISK_SIZE=$(echo "${DISK_SIZE}" | sed 's/MB/M/g;s/GB/G/g;s/TB/T/g')
DATA_SIZE=$(numfmt --from=iec "${DISK_SIZE}")

DATA="$IMG/data${DISK_SIZE}.img"

if [ ! -f "$DATA" ]; then
  if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
    rm -f "${DATA}"
    echo "ERROR: Not enough free space to create virtual disk." && exit 82
  fi
fi

[ ! -f "$DATA" ] && echo "ERROR: Data image does not exist ($DATA)" && exit 83

KVM_DISK_OPTS="\
    -drive id=cdrom0,if=none,format=raw,readonly=on,file=${BOOT} \
    -device virtio-scsi-pci,id=scsi0 \
    -device scsi-cd,bus=scsi0.0,drive=cdrom0 \
    -device virtio-scsi-pci,id=hw-userdata,bus=pcie.0,addr=0xa \
    -drive file=${DATA},if=none,id=drive-userdata,format=raw,cache=none,aio=native,discard=on,detect-zeroes=on \
    -device scsi-hd,bus=hw-userdata.0,channel=0,scsi-id=0,lun=0,drive=drive-userdata,id=userdata0,rotation_rate=1,bootindex=1"