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#!/bin/sh
. /lib/functions.sh
. /lib/upgrade/common.sh
. /usr/share/libubox/jshn.sh
OWRT_VOLUMES=owrt-volumes
get_partition_by_name_gpt() {
local dev="$1"
local part parts node name
json_load "$(sfdisk -J "/dev/$dev" 2>/dev/null)"
json_select "partitiontable" || return
json_select "partitions" || return
json_get_keys parts
for part in $parts; do
json_select "$part"
json_get_vars node name
if [ "$2" = "$name" ]; then
echo "$node"
break
fi
json_select ..
done
}
part_fixup() {
echo "write" | sfdisk --force -q -w never "$1"
}
get_free_area() {
local found=
sfdisk -q -F "$1" 2>/dev/null | while read -r start end sectors size; do
case $start in
*"Unpartitioned"* | *"Units:"* | *"Sector"* | *"Start"* )
continue
;;
[0-9]*)
case "$size" in
*"M")
[ "${size%%M}" -lt 100 ] && continue
;;
*"G" | *"T")
;;
*"k" | *"b")
continue
;;
esac
[ "$found" ] || echo "start=$start, size=$((end - start))"
found=1
;;
esac
done
}
create_lvm_part() {
local disk="$1"
local freepart
freepart="$(get_free_area "$disk")"
if [ "$freepart" ]; then
echo "$freepart, type=lvm, name=$OWRT_VOLUMES" | sfdisk --force -w never -a "$disk"
partx -a "$disk" 1>/dev/null 2>/dev/null || true
return 0
else
return 1
fi
}
lvm_init() {
lvm pvcreate -f "$1"
lvm vgcreate "$2" "$1"
lvm vgs
}
autopart_init() {
local diskdev
local lvmpart
local diskserial diskhash
export_bootdevice && export_partdevice diskdev 0
[ "$diskdev" ] || return
[ -e "/sys/class/block/$diskdev/device/serial" ] && diskserial="$(cat "/sys/class/block/$diskdev/device/serial")"
[ -e "/sys/class/block/$diskdev/device/cid" ] && diskserial="$diskserial$(cat "/sys/class/block/$diskdev/device/cid")"
[ "$diskserial" ] || diskserial="$(cat /proc/sys/kernel/random/uuid)"
diskhash="$(echo "$diskserial" | sha256sum | cut -d' ' -f1)"
part_fixup "/dev/$diskdev"
create_lvm_part "/dev/$diskdev" || return
lvmpart="$(get_partition_by_name_gpt "$diskdev" "$OWRT_VOLUMES")"
[ "$lvmpart" ] || return
lvm_init "$lvmpart" "${OWRT_VOLUMES}-${diskhash:0:16}"
}
autopart_init
exit 0
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