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#!/bin/bash
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# Copyright 2011 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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#   1. Redistributions of source code must retain the above copyright
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#      notice, this list of conditions and the following disclaimer.
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#
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#  2. Redistributions in binary form must reproduce the above copyright
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#     notice, this list of conditions and the following disclaimer in the
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#     documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and documentation are
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# those of the authors and should not be interpreted as representing official
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# policies, either expressed or implied, of GRNET S.A.
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set -e
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. common.sh
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ganeti_os_main
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case "$IMAGE_TYPE" in
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    extdump)
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	IMAGE_FILE="${IMAGE_DIR}/${IMAGE_NAME}-${ARCH}.extdump";;
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    ntfsdump)
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        IMAGE_FILE="${IMAGE_DIR}/${IMAGE_NAME}-${ARCH}.ntfsdump";;
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    *)
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        log_error "Unknown image type: \`$IMAGE_TYPE'.";
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        exit 1
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esac
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if [ ! -e "$IMAGE_FILE" ]; then
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    log_error "Image file \`$IMAGE_FILE' does not exit."
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    exit 1
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fi
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MONITOR="" #Empty if progress monitor support is disabled
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if [ "$progress_monitor_support" = "yes" ]; then
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    IMAGE_SIZE="$(stat -L -c %s ${IMAGE_FILE})"
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    MONITOR="$PROGRESS_MONITOR -i ${INSTANCE_NAME} -r ${IMAGE_SIZE}"
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fi
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# If the target device is not a real block device we'll first losetup it.
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# This is needed for file disks.
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if [ ! -b $blockdev ]; then
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    ORIGINAL_BLOCKDEV=$blockdev
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    blockdev=$($LOSETUP -sf $blockdev)
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    CLEANUP+=("$LOSETUP -d $blockdev")
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fi
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format_disk0 $blockdev ${IMAGE_TYPE}
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filesystem_dev=$(map_disk0 $blockdev)
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CLEANUP+=("unmap_disk0 $blockdev")
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root_dev="${filesystem_dev}-1"
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# dd the dump to its new home :-)
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# Deploying an image file on a target block device is a streaming
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# copy operation. Enable the direct I/O flag on the output fd to 
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# avoid polluting the host cache with useless data.
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$MONITOR dd bs=4M if=$IMAGE_FILE of=$root_dev oflag=direct
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# Create a floppy image
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floppy=$(mktemp --tmpdir floppy.XXXXXXXX)
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CLEANUP+=("rm -f $floppy")
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snf_export_DEV=/dev/vda
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snf_export_TYPE=${IMG_FORMAT}
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snf_export_PASSWORD=${IMG_PASSWD}
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snf_export_HOSTNAME=${instance}
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if [ -n "$IMG_PERSONALITY" ]; then
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    snf_export_PERSONALITY=${IMG_PERSONALITY}
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fi
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create_floppy $floppy
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# Invoke the helper vm to do the dirty job...
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result_file=$(mktemp --tmpdir result.XXXXXXXX)
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CLEANUP+=("rm -f $result_file")
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$TIMELIMIT -t $HELPER_SOFT_TIMEOUT -T $HELPER_HARD_TIMEOUT \
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    kvm -runas $HELPER_USER -drive file=${HELPER_IMG},snapshot=on \
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    -drive file=$root_dev,format=raw,if=virtio,cache=none \
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    -boot c -serial stdio -serial file:$result_file -fda $floppy \
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    -vga none -nographic -parallel none -monitor null -nographic \
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    -kernel ${HELPER_KERNEL} -initrd ${HELPER_INITRD} \
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    -append "quiet ro root=/dev/sda1 console=ttyS0,9600n8" \
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    2>&1 | sed 's|^|HELPER: |g'
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if [ $? -ne 0 ]; then
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    if [ $? -gt 128 ];  then
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        log_error "Helper was terminated. Did not finish on time."
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    fi
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    exit 1
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fi
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# Read the first line. This will remove \r and \n chars
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result=$(sed 's|\r||g' $result_file | xargs echo)
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if [ "x$result" != "xSUCCESS" ]; then
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    log_error "Helper VM returned error"
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    exit 1
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fi
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# Install a new MBR
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$INSTALL_MBR -p 1 -i n ${blockdev}
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# Execute cleanups
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cleanup
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trap - EXIT
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exit 0
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# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :