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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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set -o pipefail
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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 "$IMAGE_FILE")"
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    monitor="$(printf "%q" "$PROGRESS_MONITOR") \
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        -i $(printf "%q" "$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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    add_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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add_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.XXXXXX)
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add_cleanup rm "$floppy"
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snf_export_DEV=/dev/vda
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snf_export_TYPE="$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.XXXXXX)
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add_cleanup rm "$result_file"
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snapshot=$(mktemp --tmpdir helperXXXXXX.img)
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add_cleanup rm "$snapshot"
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"$QEMU_IMG" create -f qcow2 -b "$HELPER_IMG" "$snapshot"
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"$TIMELIMIT" -t "$HELPER_SOFT_TIMEOUT" -T "$HELPER_HARD_TIMEOUT" \
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    kvm -runas "$HELPER_USER" -drive file="$snapshot" \
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    -drive file="$root_dev",format=raw,if=virtio,cache=none \
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    -boot c -serial stdio -serial file:"$result_file" \
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    -fda "$floppy" -vga none -nographic -parallel none -monitor null \
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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 :