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|
#!/bin/bash
# This helps to see what is going on
set -e -x
PROG_REQ=( kpartx mkfs.ext4 losetup sgdisk readlink )
function check_depends()
{
for ((i=0; i<${#PROG_REQ[@]}; i++))
do
if ! command -v ${PROG_REQ[i]} > /dev/null
then
echo "Please install the needed program: ${PROG_REQ[i]}."
exit 1
fi
done
}
function print_help
{
echo "usage:"
echo " $0 -c CONFIG_FILE -d UBOOT_DIRECTORY <-w WORK_DIRECTORY> -o IMG_FILE"
echo " $0 -h"
echo "where:"
echo " -c CONFIG_FILE - configuration file"
echo " -d UBOOT_DIRECTORY - root directory for the paths specified in CONFIG_FILE"
echo " -w WORK_DIRECTORY - work directory used when building the image"
echo " -o IMG_FILE - the output img file "
echo "Example:"
echo " $0 -c ../config -d ./build42 -w tmp -o disk.img"
}
# before anything else, check if we have root privilege
if ! [ $(id -u) = 0 ]
then
echo "This script needs root privilege to run, exiting."
exit 1
fi
while getopts ":w:d:c:o:h" opt
do
case ${opt} in
w )
DESTDIR=$OPTARG
;;
d )
UBOOT_OUT=$OPTARG
;;
c )
CFG_FILE=$OPTARG
;;
o )
IMG=$OPTARG
;;
h )
print_help
exit 0
;;
* )
echo "Unknown option, see \"$0 -h\""
exit 1
;;
esac
done
shift $((OPTIND -1))
if [ -z "$UBOOT_OUT" ] || [ -z "$CFG_FILE" ] || [ -z "$IMG" ]
then
echo "Undefined arguments, see \"$0 -h\""
exit 1
fi
# if the user hasn't specified a working directing, create it
if [ -z "$DESTDIR" ]
then
DESTDIR="$(mktemp -d /tmp/imagebuilder.XXXXXX)"
DESTDIR_DEL=true
else
DESTDIR_DEL=false
fi
UBOOT_OUT_ABS="$(readlink -f $UBOOT_OUT)"
DESTDIR_ABS="$(readlink -f $DESTDIR)"
check_depends
source "$CFG_FILE"
offset=$((2*1024*1024))
_part1_size=`stat -L --printf="%s" $UBOOT_OUT/$XEN`
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/$DOM0_KERNEL` ))
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/$DEVICE_TREE` ))
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/$UBOOT_SOURCE` ))
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/$UBOOT_SCRIPT` ))
i=0
while test $i -lt $NUM_DOMUS
do
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/${DOMU_KERNEL[$i]}` ))
if test "${DOMU_RAMDISK[$i]}"
then
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/${DOMU_RAMDISK[$i]}` ))
fi
if test "${DOMU_PASSTHROUGH_DTB[$i]}"
then
_part1_size=$(( $_part1_size + `stat -L --printf="%s" $UBOOT_OUT/${DOMU_PASSTHROUGH_DTB[$i]}` ))
fi
i=$(( $i + 1 ))
done
# add 16 MB slack
_part1_size=$(( $_part1_size + 16777216 ))
_part1_size=$(( $_part1_size + $offset - 1))
_part1_size=$(( $_part1_size & ~($offset - 1) ))
_part1_size=$(( $_part1_size / 1024 / 1024 ))
echo PART1 size: "$_part1_size"MB
if test "$DOM0_RAMDISK"
then
_part2_size=`stat -L --printf="%s" $UBOOT_OUT/$DOM0_RAMDISK`
fi
_part2_size=$(( $_part2_size + $offset - 1))
_part2_size=$(( $_part2_size & ~($offset - 1) ))
# account for gzip compression
_part2_size=$(( $_part2_size * 2 ))
# add some slack
_part2_size=$(( 128*1024*1024 + $_part2_size ))
_part2_size=$(( $_part2_size / 1024 / 1024 ))
echo PART2 size: "$_part2_size"MB
_sector_size=512
# _sector_first_start needs to be aligned to 2048
_sector_first_start=2048
_sector_first_end=$(( $_part1_size * 1024 * 1024 / $_sector_size + $_sector_first_start - 1))
_sector_second_start=$(( $_sector_first_end + 1 ))
_sector_second_end=$(( $_part2_size * 1024 * 1024 / $_sector_size + $_sector_second_start - 1))
_tot_size=$(( $_part1_size + $_part2_size + 16 ))
# NOTE: Increase vos_a to 256 to accomodate rootfs
# 528 MiB (256 + 256 + 16)
truncate $IMG -s "$_tot_size"M
# create GPT partition table
sgdisk -og $IMG
sgdisk -n 1:$_sector_first_start:$_sector_first_end -c 1:"Linux1" -t 1:8300 $IMG
sgdisk -n 2:$_sector_second_start:$_sector_second_end -c 2:"Linux2" -t 2:8300 $IMG
# find the first available loop device
_loop_dev=$(losetup -f)
# attach loopback device to $IMG
losetup $_loop_dev $IMG
_disksize=$(blockdev --getsize $_loop_dev)
dmsetup create diskimage --table "0 $_disksize linear $_loop_dev 0"
# ensure that /dev/mapper/diskimage exists
while [ ! -b /dev/mapper/diskimage ]
do
sleep 2
done
kpartx -a /dev/mapper/diskimage
# ensure that /dev/mapper/{diskimage1,diskimage2} exists
while [ ! -b /dev/mapper/diskimage1 ] || [ ! -b /dev/mapper/diskimage2 ]
do
sleep 2
done
# format vos_a partition
mkfs.ext4 -L vos_a -F /dev/mapper/diskimage1
# format vos_b partition
mkfs.ext4 -L vos_b -F /dev/mapper/diskimage2
# create mount point and mount disk2
mkdir -p ${DESTDIR}/part/disk2
mount -t ext4 /dev/mapper/diskimage2 $DESTDIR/part/disk2
# Extract rootfs cpio archive into `.../part/vos_a`
cd ${DESTDIR}/part/disk2
cat "${UBOOT_OUT_ABS}/${DOM0_RAMDISK}" | gunzip | cpio -id
cd -
# umount
sync
umount $DESTDIR/part/disk2
# create mount point and mount disk1
mkdir -p ${DESTDIR}/part/disk1
mount -t ext4 /dev/mapper/diskimage1 $DESTDIR/part/disk1
# only copy over files that were counted for the partition size
cd "$UBOOT_OUT"
cp --parents "$XEN" "${DESTDIR_ABS}/part/disk1/"
cp --parents "$DOM0_KERNEL" "${DESTDIR_ABS}/part/disk1/"
cp --parents "$DEVICE_TREE" "${DESTDIR_ABS}/part/disk1/"
cp --parents "$UBOOT_SOURCE" "${DESTDIR_ABS}/part/disk1/"
cp --parents "$UBOOT_SCRIPT" "${DESTDIR_ABS}/part/disk1/"
i=0
while test $i -lt $NUM_DOMUS
do
cp --parents "${DOMU_KERNEL[$i]}" "${DESTDIR_ABS}/part/disk1/"
if test "${DOMU_RAMDISK[$i]}"
then
cp --parents "${DOMU_RAMDISK[$i]}" "${DESTDIR_ABS}/part/disk1/"
fi
if test "${DOMU_PASSTHROUGH_DTB[$i]}"
then
cp --parents "${DOMU_PASSTHROUGH_DTB[$i]}" "${DESTDIR_ABS}/part/disk1/"
fi
i=$(( $i + 1 ))
done
cd -
# unmount
sync
# This fails for some reason. It could work now because we are not using qemu-user
# fstrim $DESTDIR/part/disk1
umount $DESTDIR/part/disk1
kpartx -d /dev/mapper/diskimage
dmsetup remove diskimage
losetup -d $_loop_dev
if [ "$DESTDIR_DEL" = true ]
then
rm -rf "$DESTDIR"
fi
|
