#!/bin/sh

# Apply LVM partitioning on top of a RAID preseed

if ! [ -f /var/lib/partman/initial_auto_raid_pvs ] ||
   ! [ -e /lib/partman/lib/auto-lvm.sh ]; then
	exit 0
fi

. /lib/partman/lib/auto-lvm.sh

# pv_devices is used by auto_lvm_perform()
pv_devices="$(cat /var/lib/partman/initial_auto_raid_pvs)"
rm -f /var/lib/partman/initial_auto_raid_pvs

db_get partman-auto/expert_recipe_file
recipe="$RET"

# Clone-and-hack from partman-auto-lvm, which can't cope with the idea of
# not needing to create partitions for itself yet.

size=0
devs=
for pv_device in $pv_devices; do
	dev="$(dev_to_partman $pv_device)"
	devs="${devs:+$devs }$dev"
	[ -f $dev/size ] || exit 1
	size=$(($size + $(cat $dev/size)))
done

set -- $devs
main_device=$1
shift
extra_devices="$*"

# Be sure the modules are loaded
modprobe dm-mod >/dev/null 2>&1 || true
modprobe lvm-mod >/dev/null 2>&1 || true

if type update-dev >/dev/null 2>&1; then
	log-output -t update-dev update-dev --settle
fi

if [ "$extra_devices" ]; then
	for dev in $devs; do
		physdev="$(cat "$dev/device")"
		target="${target:+$target }${physdev#/dev/}"
	done
	db_metaget partman-auto-lvm/text/multiple_disks description
	target=$(printf "$RET" "$target")
else
	target="$(humandev $(cat $main_device/device)) - $(cat $main_device/model)"
fi
target="$target: $(longint2human $size)"
free_size=$(convert_to_megabytes $size)

choose_recipe lvm "$target" "$free_size" || return $?

# Make sure the recipe contains lvmok tags
if ! echo "$scheme" | grep -q lvmok; then
	bail_out unusable_recipe
fi

# Make sure a boot partition isn't marked as lvmok, unless the user
# has told us it is ok for /boot to reside on a logical volume
if echo "$scheme" | grep lvmok | grep -q "[[:space:]]/boot[[:space:]]"; then
	db_input critical partman-auto-lvm/no_boot || true
	db_go || return 255
	db_get partman-auto-lvm/no_boot || true
	[ "$RET" = true ] || bail_out unusable_recipe
fi

expand_scheme

# Extract the mapping of which VG goes onto which PV
auto_lvm_create_vg_map

auto_lvm_perform