#!/bin/bash

# Copyright 2011 GRNET S.A. All rights reserved.
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set -e

. common.sh

ganeti_os_main

case "$IMAGE_TYPE" in
    extdump)
	IMAGE_FILE="${IMAGE_DIR}/${IMAGE_NAME}-${ARCH}.extdump";;
    ntfsdump)
        IMAGE_FILE="${IMAGE_DIR}/${IMAGE_NAME}-${ARCH}.ntfsdump";;
    *)
        log_error "Unknown image type: \`$IMAGE_TYPE'.";
        exit 1
esac

if [ ! -e "$IMAGE_FILE" ]; then
    log_error "Image file \`$IMAGE_FILE' does not exit."
    exit 1
fi

MONITOR="" #Empty if progress monitor support is disabled
if [ "$progress_monitor_support" = "yes" ]; then
    IMAGE_SIZE="$(stat -L -c %s ${IMAGE_FILE})"
    MONITOR="$PROGRESS_MONITOR -i ${INSTANCE_NAME} -r ${IMAGE_SIZE}"
fi

# If the target device is not a real block device we'll first losetup it.
# This is needed for file disks.
if [ ! -b $blockdev ]; then
    ORIGINAL_BLOCKDEV=$blockdev
    blockdev=$($LOSETUP -sf $blockdev)
    CLEANUP+=("$LOSETUP -d $blockdev")
fi

format_disk0 $blockdev ${IMAGE_TYPE}

filesystem_dev=$(map_disk0 $blockdev)
CLEANUP+=("unmap_disk0 $blockdev")

root_dev="${filesystem_dev}-1"

# dd the dump to its new home :-)
# Deploying an image file on a target block device is a streaming
# copy operation. Enable the direct I/O flag on the output fd to 
# avoid polluting the host cache with useless data.
$MONITOR dd bs=4M if=$IMAGE_FILE of=$root_dev oflag=direct

# Create a floppy image
floppy=$(mktemp --tmpdir floppy.XXXXXXXX)
CLEANUP+=("rm -f $floppy")

snf_export_DEV=/dev/vda
snf_export_TYPE=${IMG_FORMAT}
snf_export_PASSWORD=${IMG_PASSWD}
snf_export_HOSTNAME=${instance}
if [ -n "$IMG_PERSONALITY" ]; then
    snf_export_PERSONALITY=${IMG_PERSONALITY}
fi

create_floppy $floppy

# Invoke the helper vm to do the dirty job...
result_file=$(mktemp --tmpdir result.XXXXXXXX)
CLEANUP+=("rm -f $result_file")

$TIMELIMIT -t $HELPER_SOFT_TIMEOUT -T $HELPER_HARD_TIMEOUT \
    kvm -runas $HELPER_USER -drive file=${HELPER_IMG},snapshot=on \
    -drive file=$root_dev,format=raw,if=virtio,cache=none \
    -boot c -serial stdio -serial file:$result_file -fda $floppy \
    -vga none -nographic -parallel none -monitor null -nographic \
    -kernel ${HELPER_KERNEL} -initrd ${HELPER_INITRD} \
    -append "quiet ro root=/dev/sda1 console=ttyS0,9600n8" \
    2>&1 | sed 's|^|HELPER: |g'

if [ $? -ne 0 ]; then
    if [ $? -gt 128 ];  then
        log_error "Helper was terminated. Did not finish on time."
    fi
    exit 1
fi

# Read the first line. This will remove \r and \n chars
result=$(sed 's|\r||g' $result_file | xargs echo)

if [ "x$result" != "xSUCCESS" ]; then
    log_error "Helper VM returned error"
    exit 1
fi

# Install a new MBR
$INSTALL_MBR -p 1 -i n ${blockdev}

# Execute cleanups
cleanup
trap - EXIT

exit 0

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :