#! /bin/bash
# FS QA Test No. 278
#
# Test xfs_repair to ensure it fixes the lost+found link count
# at the first run. See also commit 198b747f255346bca64408875763b6ca0ed3d57d
# from xfsprogs tree.
#
#-----------------------------------------------------------------------
# Copyright (c) 2011 Red Hat, Inc.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------
#

seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=0	# 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 xfs
_supported_os Linux
_require_scratch

rm -f $seqres.full
_scratch_mkfs >$seqres.full 2>&1
_scratch_mount

mkdir -p $SCRATCH_MNT/dir/subdir

#get inodes to be changed
DIR_INO=`ls -i $SCRATCH_MNT |awk '{print $1}'`
SUBDIR_INO=`ls -i $SCRATCH_MNT/dir |awk '{print $1}'`

_scratch_unmount

echo "Silence is goodness..."

get_sfdir_prefix() {
	local dir_ino="$1"

	for prefix in "u.sfdir3" "u.sfdir2" "u3.sfdir3"; do
		if [ -n "$(_scratch_xfs_get_metadata_field \
				"${prefix}.hdr.parent.i4" \
				"inode ${dir_ino}")" ]; then
			echo "${prefix}"
			return 0
		fi
	done
	_scratch_xfs_db -c "inode ${dir_ino}" -c 'p' >> $seqres.full
	return 1
}
set_ifield() {
	_scratch_xfs_set_metadata_field "$1" 0 "inode $2" >> $seqres.full
}

sfdir_prefix="$(get_sfdir_prefix "$DIR_INO" || \
	_fail "Cannot determine sfdir prefix")"

# Corrupt DIR

set_ifield "${sfdir_prefix}.list[0].inumber.i4" "$DIR_INO"
set_ifield "${sfdir_prefix}.list[0].name" "$DIR_INO"
set_ifield "${sfdir_prefix}.list[0].offset" "$DIR_INO"
set_ifield "${sfdir_prefix}.list[0].namelen" "$DIR_INO"
set_ifield "${sfdir_prefix}.hdr.parent.i4" "$DIR_INO"
set_ifield "core.nlinkv2" "$DIR_INO"

# Corrupt SUBDIR
set_ifield "${sfdir_prefix}.hdr.parent.i4" "$SUBDIR_INO"
set_ifield "core.nlinkv2" "$SUBDIR_INO"

echo "===== BEGIN of xfs_repair =====" >> $seqres.full
echo "" >>$seqres.full

xfs_repair  $SCRATCH_DEV >> $seqres.full 2>&1
echo "===== END of xfs_repair =====" >> $seqres.full

exit