#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2017 CTERA Networks. All Rights Reserved.
#
# FS QA Test 037
#
# Test mount error cases with option index=on
#
# - Upper/lower mismatch
# - Index/upper mismatch
#
# With index=on, lowerdir and upperdir are verified using a file handle
# stored in trusted.overlay.origin xattr in upperdir and indexdir.
#
# Failure to verify lowerdir/upperdir on mount results in ESTALE.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs overlay
_supported_os Linux
# Use non-default scratch underlying overlay dirs, we need to check
# them explicity after test.
_require_scratch_nocheck
_require_scratch_feature index

# Remove all files from previous tests
_scratch_mkfs

# Create multiple lowerdirs, upperdirs and workdir
lowerdir=$OVL_BASE_SCRATCH_MNT/lower
lowerdir2=$OVL_BASE_SCRATCH_MNT/lower2
upperdir=$OVL_BASE_SCRATCH_MNT/upper
upperdir2=$OVL_BASE_SCRATCH_MNT/upper2
workdir=$OVL_BASE_SCRATCH_MNT/workdir
mkdir -p $lowerdir $lowerdir2 $upperdir $upperdir2 $workdir

# Mount overlay with lowerdir, upperdir, workdir and index=on
# to store the file handles of lowerdir and upperdir in overlay.origin xattr
_overlay_scratch_mount_dirs $lowerdir $upperdir $workdir -oindex=on
$UMOUNT_PROG $SCRATCH_MNT

# Try to mount an overlay with the same upperdir and different lowerdir - expect ESTALE
_overlay_scratch_mount_dirs $lowerdir2 $upperdir $workdir -oindex=on \
	2>&1 | _filter_error_mount
$UMOUNT_PROG $SCRATCH_MNT 2>/dev/null

# Try to mount an overlay with the same workdir and different upperdir - expect ESTALE
_overlay_scratch_mount_dirs $lowerdir $upperdir2 $workdir -oindex=on \
	2>&1 | _filter_error_mount
$UMOUNT_PROG $SCRATCH_MNT 2>/dev/null

# Mount overlay with original lowerdir, upperdir, workdir and index=on - expect success
_overlay_scratch_mount_dirs $lowerdir $upperdir $workdir -oindex=on

# check overlayfs
_overlay_check_scratch_dirs $lowerdir $upperdir $workdir -oindex=on

# success, all done
status=0
exit