#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2019 FUJITSU LIMITED. All rights reserved.
#
# FSQA Test No. 035
#
# Regression test for commit:
# f96c3ac8dfc2 ("ext4: fix crash during online resizing")
#
# This case tests a loss s_first_data_block on ext4 when computing
# maximum size with given number of group descriptor blocks.  Filesystem
# with non-zero s_first_data_block can happen that computed maximum size
# lower than current size and leads to a BUG_ON in in ext4_alloc_group_tables()
# hitting on flex_gd->count == 0.
#
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

# real QA test starts here
_supported_fs ext4
_require_scratch
_exclude_scratch_mount_option dax
_require_command "$RESIZE2FS_PROG" resize2fs

rm -f $seqres.full

$MKFS_EXT4_PROG -F -b 1024 -E "resize=262144" $SCRATCH_DEV 32768 >> $seqres.full 2>&1
_scratch_mount

echo "Resizing to 262145 blocks"
$RESIZE2FS_PROG $SCRATCH_DEV 262145 >> $seqres.full 2>&1

echo "Resizing to 300000 blocks"
$RESIZE2FS_PROG $SCRATCH_DEV 300000 >> $seqres.full 2>&1

# success, all done
status=0
exit