tests: add losetup/mount encryption test

Signed-off-by: Karel Zak <kzak@redhat.com>

tests/expected/mount/encryption

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+Success

tests/ts/mount/encryption

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+#!/bin/bash
+
+#
+# Copyright (C) 2007 Karel Zak <kzak@redhat.com>
+#
+# This file is part of util-linux.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+
+TS_TOPDIR="$(dirname $0)/../.."
+TS_DESC="by devname"
+
+. $TS_TOPDIR/functions.sh
+ts_init "$*"
+ts_skip_nonroot
+
+set -o pipefail
+
+modprobe --dry-run --quiet cryptoloop
+[ "$?" == 0 ] || ts_skip "missing cryptoloop module"
+
+modprobe cryptoloop &> /dev/null
+
+PASSFILE=$TS_OUTPUT.pwd
+IMAGE=$(ts_image_init)
+
+echo "password" > $PASSFILE
+exec 9<> $PASSFILE
+
+DEVICE=$($TS_CMD_LOSETUP --pass-fd 9 --show --encryption blowfish --find $IMAGE)
+[ "$?" == 0 ] || ts_die "Cannot init device"
+
+mkfs.ext3 $DEVICE &> /dev/null || ts_die "Cannot make ext3 on $DEVICE" $DEVICE
+
+sleep 3
+$TS_CMD_LOSETUP --detach $DEVICE
+
+[ -d "$TS_MOUNTPOINT" ] || mkdir -p $TS_MOUNTPOINT
+
+# reopen (we need SEEK_SET 0, but this is shell...)
+exec 9>&-
+exec 9<> $PASSFILE
+
+$TS_CMD_MOUNT --pass-fd 9 -o encryption=blowfish $IMAGE $TS_MOUNTPOINT 2>&1 >> $TS_OUTPUT
+
+$TS_CMD_FINDMNT --kernel --target $TS_MOUNTPOINT  &> /dev/null
+[ "$?" == "0" ] || ts_die "Cannot find $TS_MOUNTPOINT in /proc/self/mountinfo"
+
+$TS_CMD_UMOUNT $TS_MOUNTPOINT || ts_die "Cannot umount $TS_MOUNTPOINT" $DEVICE
+
+ts_device_deinit $DEVICE
+
+ts_log "Success"
+ts_finalize
+