#!/bin/sh
set -e

#CRYPTSETUP=/lib/systemd/systemd-cryptsetup
CRYPTSETUP=./systemd-cryptsetup

rc=0
modprobe scsi_debug
while [ -z $devpath ]; do
    devpath=$(udevadm trigger --verbose --dry-run --property-match=ID_MODEL=scsi_debug)
    sleep 0.1
done
devnode=/dev/$(basename $devpath)
[ -b "$devnode" ]

echo "creating normal swap partition..."
mkswap $devnode
blkid -p $devnode
uuid=$(blkid -o value -s UUID -p $devnode)

echo "attaching..."
$CRYPTSETUP attach testcryptswap1 /dev/disk/by-uuid/$uuid /dev/urandom 'swap,offset=1024,cipher=aes-xts-plain64'
/sbin/mkswap /dev/mapper/testcryptswap1


echo "checking that raw swap UUID is still valid"
[ "$(blkid -o value -s UUID -p /dev/sdb)" = $uuid ] || {
    echo "FAIL: UUID of raw device changed!" >&2
    rc=1
}

blkid -p /dev/mapper/testcryptswap1 | grep 'TYPE="swap"'

echo "stopping cryptswap.."
$CRYPTSETUP detach testcryptswap1

echo "checking that raw swap UUID is still valid"
[ "$(blkid -o value -s UUID -p /dev/sdb)" = $uuid ] || {
    echo "FAIL: UUID of raw device changed!" >&2
    rc=1
}

rmmod scsi_debug

exit $rc