#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
#
# FS QA Test No. 010
#
# Create and populate an ext4 filesystem, corrupt an inode bitmap, then
# see how the kernel and e2fsck deal with it.
#
. ./common/preamble
_begin_fstest fuzzers

# Override the default cleanup function.
_cleanup()
{
    cd /
    #rm -f $tmp.*
}

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

# real QA test starts here
_supported_fs ext4

_require_scratch
_require_dumpe2fs
test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
_require_attrs
_require_command "$RESIZE2FS_PROG" resize2fs

TESTDIR="${SCRATCH_MNT}/scratchdir"
TESTFILE="${TESTDIR}/testfile"

echo "+ create scratch fs"
_scratch_mkfs_ext4 > /dev/null 2>&1
$DUMPE2FS_PROG -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"
$RESIZE2FS_PROG -M "${SCRATCH_DEV}" >> $seqres.full 2>&1
nr_groups="$($DUMPE2FS_PROG -g "${SCRATCH_DEV}" 2> /dev/null | tail -n 1 | cut -d : -f 1)"

echo "+ mount fs image"
_scratch_mount

echo "+ make some files"
# abuse orlov allocator in the hopes that each bg ends up with some inodes
for i in `seq 1 $((nr_groups * 8))`; do
	mkdir -p "${SCRATCH_MNT}/d_${i}"
done
umount "${SCRATCH_MNT}"

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

echo "+ corrupt image"
$DUMPE2FS_PROG -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if (int($6) > 0) {print $6}}' | while read blk; do
	debugfs -w -n -R "zap_block ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "inode bitmap fuzz failed"
done

echo "+ mount image"
_scratch_mount

echo "+ modify files"
touch "${SCRATCH_MNT}/file0" > /dev/null 2>&1 && _fail "touch should fail"
umount "${SCRATCH_MNT}"

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

echo "+ mount image (2)"
_scratch_mount

echo "+ modify files (2)"
touch "${SCRATCH_MNT}/file1"
umount "${SCRATCH_MNT}"

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

status=0
exit