#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2007 Silicon Graphics, Inc.  All Rights Reserved.
#
# FS QA Test No. 178
#
# Reproduce PV#:967665
# Test if mkfs.xfs wipes old AG headers when using -f option
#
. ./common/preamble
_begin_fstest mkfs other auto

filter_repair() {
	_filter_repair | sed \
		-e '/unable to verify superblock, continuing/d' \
		-e '/found candidate secondary superblock/d' \
		-e '/error reading superblock.*-- seek to offset/d'
}

# dd the 1st sector then repair
_dd_repair_check()
{
	#dd first sector
	dd if=/dev/zero of=$1 bs=$2 count=1 2>&1 | _filter_dd
	#xfs_repair
	_scratch_xfs_repair 2>&1 | filter_repair
	#check repair
	if _check_scratch_fs; then
        	echo "repair passed"
	else
	        echo "repair failed!"
	fi
}

# Import common functions.
. ./common/filter
. ./common/repair


# Modify as appropriate.

# From the PV
# o Summary of testing:
#    1. mkfs.xfs a default filesystem, note agcount value.
#    2. dd zero first sector and repair and verify.
#    3. mkfs.xfs overriding agcount to a smaller value
#             (ie. each AG is bigger)
#    4. dd zero first sector, repair and verify.
#          -> old mkfs.xfs will cause repair to incorrectly
#             fix filesystem, new mkfs.xfs will be fine.

_require_scratch
_scratch_xfs_force_no_metadir
_scratch_mkfs_xfs | _filter_mkfs 2>$tmp.mkfs

# By executing the followint tmp file, will get on the mkfs options stored in
# variables
. $tmp.mkfs

# if the default agcount is too small, bump it up and re-mkfs before testing
if [ $agcount -lt 8 ]; then
	agcount=8
	_try_scratch_mkfs_xfs -dagcount=$agcount >/dev/null 2>&1 \
	        || _notrun "Test requires at least 8 AGs."
fi

_dd_repair_check $SCRATCH_DEV $sectsz

# smaller AGCOUNT
let "agcount=$agcount-2"
_scratch_mkfs_xfs -dagcount=$agcount >/dev/null 2>&1

_dd_repair_check $SCRATCH_DEV $sectsz

# success, all done
status=0
exit
