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#!/bin/sh
. /lib/functions.sh
. /lib/upgrade/common.sh
. /usr/share/libubox/jshn.sh
OWRT_VOLUMES=owrt-volumes
load_partitions() {
local dev="$1"
json_init
json_load "$(sfdisk -J "$dev" 2>/dev/null)"
json_select "partitiontable" || return 1
return 0
}
get_partition_by_name_gpt() {
local label part parts node name
json_get_vars label
[ "$label" = "gpt" ] || return
json_select "partitions" || return
json_get_keys parts
for part in $parts; do
json_select "$part"
json_get_vars node name
if [ "$1" = "$name" ]; then
echo "$node"
break
fi
json_select ..
done
json_select ..
}
get_partition_by_type_mbr() {
local label part parts node type
json_get_vars label
[ "$label" = "dos" ] || return
json_select "partitions" || return
json_get_keys parts
for part in $parts; do
json_select "$part"
json_get_vars node type
if [ "$1" = "$type" ]; then
echo "$node"
break
fi
json_select ..
done
json_select ..
}
part_fixup() {
echo "write" | sfdisk --force -q -w never "$1" 1>/dev/null 2>/dev/null
}
get_free_area() {
local found=
sfdisk --bytes -q -F "$1" 2>/dev/null | while read -r start end sectors size; do
case $start in
*"Unpartitioned"* | *"Units:"* | *"Sector"* | *"Start"* )
continue
;;
[0-9]*)
[ "$size" -lt $((100 * 1024 * 1024)) ] && continue
[ "$found" ] || echo "start=$start, size=$sectors"
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 "$disk" || return 1
partx -a "$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/$diskdev" || return
load_partitions "/dev/$diskdev" || return
lvmpart="$(get_partition_by_name_gpt "$OWRT_VOLUMES")"
[ "$lvmpart" ] || lvmpart="$(get_partition_by_type_mbr "8e")"
[ "$lvmpart" ] || return
lvm_init "$lvmpart" "${OWRT_VOLUMES}-${diskhash:0:16}"
}
autopart_init
exit 0
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