#! /bin/bash
# SPDX-License-Identifier: GPL-2.0-or-newer
# Copyright (c) 2019, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 148
#
# See if we catch corrupt directory names or attr names with nulls or slashes
# in them.

. ./common/preamble
_begin_fstest auto quick fuzzers

# Override the default cleanup function.
_cleanup()
{
	cd /
	_unmount $mntpt > /dev/null 2>&1
	[ -n "$loop_dev" ] && _destroy_loop_device $loop_dev
	rm -r -f $tmp.*
}

# Import common functions.
. ./common/filter
. ./common/attr

_require_test
_require_attrs
_require_xfs_nocrc

_disable_dmesg_check

imgfile=$TEST_DIR/img-$seq
mntpt=$TEST_DIR/mount-$seq
testdir=$mntpt/testdir
testfile=$mntpt/testfile
nullstr="too_many_beans"
slashstr="are_bad_for_you"
test_names=("something" "$nullstr" "$slashstr" "another")

rm -f $imgfile $imgfile.old

# Format image file w/o crcs so we can sed the image file
#
# TODO: It might be possible to rewrite this using proper xfs_db
# fs manipulation commands that would work with CRCs.
#
# We need to use 512 byte inodes to ensure the attr forks remain in short form
# even when security xattrs are present so we are always doing name matches on
# lookup and not name hash compares as leaf/node forms will do.
$XFS_IO_PROG -f -c 'truncate 40m' $imgfile
loop_dev=$(_create_loop_device $imgfile)
MKFS_OPTIONS="-m crc=0 -i size=512" _mkfs_dev $loop_dev >> $seqres.full

# Mount image file
mkdir -p $mntpt
_mount $loop_dev $mntpt

echo "creating entries" >> $seqres.full

# Create directory entries
mkdir -p $testdir
for name in "${test_names[@]}"; do
	touch "$testdir/f_$name"
done

# Create attrs
touch $testfile
for name in "${test_names[@]}"; do
	$ATTR_PROG -s "a_$name" -V heh $testfile >> $seqres.full
done

# Now put in the first part of the garbage names to make sure we can't
# access those directly
test_names+=("too_many" "are_bad/for_you")

access_stuff() {
	ls $testdir
	$ATTR_PROG -l $testfile | grep 'a_' | sort

	for name in "${test_names[@]}"; do
		ls "$testdir/f_$name"
		$ATTR_PROG -g "a_$name" $testfile
	done
}

# Does it work?
echo "++ ACCESSING GOOD METADATA" | tee -a $seqres.full
access_stuff > $tmp.log 2>&1
cat $tmp.log >> $seqres.full
cat $tmp.log | _filter_test_dir

# Corrupt the entries
_unmount $mntpt
_destroy_loop_device $loop_dev
unset loop_dev
cp $imgfile $imgfile.old
sed -b \
	-e "s/$nullstr/too_many\x00beans/g" \
	-e "s/$slashstr/are_bad\/for_you/g" \
	-i $imgfile
test "$(md5sum < $imgfile)" != "$(md5sum < $imgfile.old)" ||
	_fail "sed failed to change the image file?"

loop_dev=$(_create_loop_device $imgfile)
_mount $loop_dev $mntpt

# Try to access the corrupt metadata
echo "++ ACCESSING BAD METADATA" | tee -a $seqres.full
access_stuff > $tmp.log 2>&1
cat $tmp.log >> $seqres.full
cat $tmp.log | _filter_test_dir | sed -e '/Could not list/d'

echo "does scrub complain?" >> $seqres.full

# Does scrub complain about this?
if _supports_xfs_scrub $mntpt $loop_dev; then
	$XFS_SCRUB_PROG -n $mntpt >> $seqres.full 2>&1
	res=$?
	test $((res & 1)) -eq 0 && \
		echo "scrub failed to report corruption ($res)"
fi

echo "does repair complain?" >> $seqres.full

# Does repair complain about this?
_unmount $mntpt
$XFS_REPAIR_PROG -n $loop_dev >> $seqres.full 2>&1
res=$?
test $res -eq 1 || \
	echo "repair failed to report corruption ($res)"

_destroy_loop_device $loop_dev
unset loop_dev

# success, all done
status=0
exit