#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
#
# FS QA Test No. 008
#
# Create and populate an ext4 filesystem, corrupt a group descriptor, then
# see how the kernel and e2fsck deal with it.
#
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
. ./common/attr

# real QA test starts here
_supported_fs ext4
_supported_os Linux

_require_scratch
test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
_require_attrs

rm -f $seqres.full
TESTDIR="${SCRATCH_MNT}/scratchdir"
TESTFILE="${TESTDIR}/testfile"

echo "+ create scratch fs"
_scratch_mkfs_ext4 > /dev/null 2>&1
dumpe2fs -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"

echo "+ mount fs image"
_scratch_mount

echo "+ make some files"
mkdir -p "${TESTDIR}"
for x in `seq 1 128`; do
	touch "${SCRATCH_MNT}/junk.${x}"
	inode="$(stat -c '%i' "${SCRATCH_MNT}/junk.${x}")"
	if [ "$x" -gt 64 ] && [ "$((inode % 64))" -eq 0 ]; then
		mv "${SCRATCH_MNT}/junk.${x}" "${TESTFILE}.1"
		break
	fi
done
for x in `seq 2 64`; do
	echo moo >> "${TESTFILE}.${x}"
done
umount "${SCRATCH_MNT}"

echo "+ check fs"
e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"

echo "+ corrupt image"
dumpe2fs -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if (int($4) != -1) {print $4}}' | sed -e 's/-.*$//g' | awk '{if (int($1) > 0) {print $1}}' | while read blk; do
	debugfs -w -R "zap_block ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "group descriptor fuzz failed"
done

echo "+ mount image"
_try_scratch_mount 2> /dev/null && _fail "mount should not succeed"

echo "+ repair fs"
e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1

echo "+ mount image (2)"
_scratch_mount

umount "${SCRATCH_MNT}"

echo "+ check fs (2)"
e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"

status=0
exit