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|
#!/bin/bash
# This helps to see what is going on
set -e
PROG_REQ=( kpartx mkfs.ext4 losetup sgdisk readlink awk )
SLACK=128
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: ${PROG_REQ[i]}."
exit 1
fi
done
}
function add_rootfs()
{
local dev=${LOAD_CMD%:*}
dev=${dev##* }
local par=${LOAD_CMD#*:}
local j=$1
if [ -z "$dev" ] || [ -z "$par" ]
then
echo "Could not parse device and partition."
exit 1
fi
par=$(( $par + $j ))
if [[ $LOAD_CMD =~ mmc ]]
then
retval="/dev/mmcblk${dev}p${par}"
elif [[ $LOAD_CMD =~ scsi ]]
then
# converts number to a scsi device character
dev=$((dev + 97))
dev=$(printf %x $dev)
dev=$(printf "\x$dev")
retval="/dev/sd${dev}${par}"
else
echo "Only mmc and scsi are supported for automatically setting the root partition."
echo "Manually set DOM0_CMD with the root device in the config file to bypass this."
exit 1
fi
}
function generate_domU_configs()
{
local i=0
local j=$1
# $j + 1 - 1 as it is starting from 0
local n=$1
local dest
mount -t ext4 /dev/mapper/diskimage$j $DESTDIR/part/disk$j
mkdir -p $DESTDIR/part/disk$j/etc/xen
add_rootfs 0
first_part=$retval
while test $i -lt $NUM_DOMUS
do
dest="$DESTDIR/part/disk$j/etc/xen/domU$i.cfg"
echo "name=\"domU$i\"" >> $dest
echo "memory=${DOMU_MEM[$i]}" >> $dest
echo "vcpus=${DOMU_VCPUS[$i]}" >> $dest
echo "# mount $first_part /boot" >> $dest
echo "kernel=\"/boot/${DOMU_KERNEL[$i]}\"" >> $dest
if test "${DOMU_RAMDISK[$i]}"
then
echo "ramdisk=\"/boot/${DOMU_RAMDISK[$i]}\"" >> $dest
fi
if [ -z "${DOMU_CMD[$i]}" ]
then
DOMU_CMD[$i]="console=hvc0"
fi
if [[ ! ${DOMU_CMD[$i]} =~ root= ]]
then
if test -z "${DOMU_ROOTFS[$i]}"
then
DOMU_CMD[$i]="${DOMU_CMD[$i]} root=/dev/ram0" >> $dest
else
DOMU_CMD[$i]="${DOMU_CMD[$i]} root=/dev/xvda" >> $dest
fi
fi
echo "extra=\"${DOMU_CMD[$i]}\"" >> $dest
if test "${DOMU_ROOTFS[$i]}"
then
add_rootfs $n
echo "disk=[\"$retval,,xvda\"]" >> $dest
fi
n=$(( $n + 1 ))
i=$(( $i + 1 ))
done
umount $DESTDIR/part/disk$j
}
function add_partition()
{
local rootfs="$1"
local aux_dir=$(mktemp -d)
cd "$aux_dir"
if [[ $rootfs = *.cpio.gz ]]
then
cat "${UBOOT_OUT_ABS}/$rootfs" | gunzip | cpio -id
_part_size=$(du -sb| awk '{print $1}')
elif [[ $rootfs = *.tar.gz ]]
then
tar -xf "${UBOOT_OUT_ABS}/$rootfs"
_part_size=$(du -sb| awk '{print $1}')
else
echo "Ignoring $rootfs: unsupported file format. Use cpio.gz or tar.gz."
fi
cd -
rm -rf "$aux_dir"
_part_size=$(( $_part_size + $offset - 1))
_part_size=$(( $_part_size & ~($offset - 1) ))
# account for gzip compression
_part_size=$(( $_part_size * 2 ))
# add some slack
_part_size=$(( $SLACK*1024*1024 + $_part_size ))
_part_size=$(( $_part_size / 1024 / 1024 ))
echo PART size: "$_part_size"MB
prev=$(( $_npart - 1 ))
_sector_start[$_npart]=$(( ${_sector_end[$prev]} + 1 ))
_sector_end[$_npart]=$(( $_part_size * 1024 * 1024 / $_sector_size + ${_sector_start[$_npart]} - 1))
_tot_size=$(( $_tot_size + $_part_size ))
_npart=$(( $_npart + 1 ))
}
function write_rootfs()
{
local j=$1
local rootfs=$2
# create mount point and mount diskn
mkdir -p ${DESTDIR}/part/disk$j
mount -t ext4 /dev/mapper/diskimage$j $DESTDIR/part/disk$j
# Extract rootfs cpio archive into `.../part/vos_$j`
cd ${DESTDIR}/part/disk$j
if [[ $rootfs = *.cpio.gz ]]
then
cat "${UBOOT_OUT_ABS}/$rootfs" | gunzip | cpio -id
elif [[ $rootfs = *.tar.gz ]]
then
tar -xf "${UBOOT_OUT_ABS}/$rootfs"
else
echo "Ignoring $rootfs: unsupported file format. Use cpio.gz or tar.gz."
fi
cd -
# umount
sync
umount $DESTDIR/part/disk$j
}
function print_help
{
echo "usage:"
echo " $0 -c CONFIG_FILE -d UBOOT_DIRECTORY -t UBOOT_TYPE <-w WORK_DIRECTORY> <-s SLACK> -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 " -t UBOOT_TYPE can be:"
echo " sd - alias for \"mmc load 0:1\" for uboot load commands"
echo " scsi - alias for \"scsi load 0:1\" for uboot load commands"
echo " tftp - alias for \"tftpb\" for uboot load cammnds"
echo " < > - used for uboot load commands"
echo " -w WORK_DIRECTORY - work directory used when building the image"
echo " -s SLACK - free MB to add to each partition, default 128"
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:t:s:o:h" opt
do
case ${opt} in
t )
case $OPTARG in
scsi )
LOAD_CMD="load scsi 0:1"
;;
sd )
LOAD_CMD="load mmc 0:1"
;;
tftp )
LOAD_CMD="tftpb"
;;
* )
LOAD_CMD="$OPTARG"
;;
esac
;;
s )
SLACK=$OPTARG
if ! test $SLACK -gt 0
then
echo "Invalid SLACK parameter."
exit 1
fi
;;
w )
DESTDIR=$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"
i=0
while test $i -lt $NUM_DOMUS
do
if test -z "${DOMU_MEM[$i]}"
then
DOMU_MEM[$i]=512
fi
if test -z "${DOMU_VCPUS[$i]}"
then
DOMU_VCPUS[$i]=1
fi
i=$(( $i + 1 ))
done
offset=$((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
_sector_size=512
# _sector_start[0] needs to be aligned to 2048
_sector_start[0]=2048
_sector_end[0]=$(( $_part1_size * 1024 * 1024 / $_sector_size + ${_sector_start[0]} - 1))
_tot_size=$(( $_part1_size ))
_npart=1
if test "$DOM0_ROOTFS"
then
add_partition "$DOM0_ROOTFS"
fi
i=0
while test $i -lt $NUM_DOMUS
do
if test "${DOMU_ROOTFS[$i]}"
then
add_partition "${DOMU_ROOTFS[$i]}"
fi
i=$(( $i + 1 ))
done
_tot_size=$(( $_tot_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
i=0
j=1
while test $i -lt $_npart
do
sgdisk -n $j:${_sector_start[$i]}:${_sector_end[$i]} -c $j:"Linux""$j" -t $j:8300 $IMG
i=$(( $i + 1 ))
j=$(( $j + 1 ))
done
# find the first available loop device
_loop_dev=$(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/mapperdiskimage1 exists
while [ ! -b /dev/mapper/diskimage1 ]
do
sleep 2
done
i=0
j=1
while test $i -lt $_npart
do
mkfs.ext4 -L vos_$j -F /dev/mapper/diskimage$j
i=$(( $i + 1 ))
j=$(( $j + 1 ))
done
# 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 $DESTDIR/part/disk1
j=2
if test "$DOM0_ROOTFS"
then
write_rootfs 2 "$DOM0_ROOTFS"
generate_domU_configs 2
j=$(( $j + 1 ))
fi
i=0
while test $i -lt $NUM_DOMUS
do
if test "${DOMU_ROOTFS[$i]}"
then
write_rootfs $j "${DOMU_ROOTFS[$i]}"
j=$(( $j + 1 ))
fi
i=$(( $i + 1 ))
done
kpartx -d /dev/mapper/diskimage
dmsetup remove diskimage
losetup -d $_loop_dev
if [ "$DESTDIR_DEL" = true ]
then
rm -rf "$DESTDIR"
fi
|