#! /bin/bash
# FS QA Test No. 235
#
# Create and populate an XFS filesystem, corrupt the rmap btree,
# then see how the kernel and xfs_repair deal with it.
#
#-----------------------------------------------------------------------
# Copyright (c) 2016 Oracle, 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  02110-7031  USA
#-----------------------------------------------------------------------
#

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_os Linux
_supported_fs xfs
_require_xfs_scratch_rmapbt
test -n ${FORCE_FUZZ} || _require_scratch_xfs_crc

rm -f $seqres.full

echo "+ create scratch fs"
_scratch_mkfs_xfs > /dev/null

echo "+ mount fs image"
_scratch_mount
blksz=$(stat -f -c '%s' ${SCRATCH_MNT})
agcount=$(xfs_info ${SCRATCH_MNT} | grep agcount= | sed -e 's/^.*agcount=\([0-9]*\),.*$/\1/g')

echo "+ make some files"
_pwrite_byte 0x62 0 $((blksz * 64)) ${SCRATCH_MNT}/file0 >> $seqres.full
_pwrite_byte 0x61 0 $((blksz * 64)) ${SCRATCH_MNT}/file1 >> $seqres.full
cp -p ${SCRATCH_MNT}/file0 ${SCRATCH_MNT}/file2
cp -p ${SCRATCH_MNT}/file1 ${SCRATCH_MNT}/file3
umount ${SCRATCH_MNT}

echo "+ check fs"
_scratch_xfs_repair -n >> $seqres.full 2>&1 || \
	_fail "xfs_repair should not fail"

echo "+ corrupt image"
seq 0 $((agcount - 1)) | while read ag; do
	_scratch_xfs_db -x -c "agf ${ag}" -c "agf ${ag}" -c "addr rmaproot" \
		-c "stack" -c "blocktrash -x 4096 -y 4096 -z -n 8 -3" \
		>> $seqres.full 2>&1
done

echo "+ mount image"
_scratch_mount

echo "+ copy more"
$XFS_IO_PROG -f -c "pwrite -S 0x63 0 $((blksz * 64))" -c "fsync" ${SCRATCH_MNT}/file4 >> $seqres.full 2>&1
test -s ${SCRATCH_MNT}/file4 && _fail "should not be able to copy with busted rmap btree"
umount ${SCRATCH_MNT}

echo "+ repair fs"
_disable_dmesg_check
_repair_scratch_fs >> "$seqres.full" 2>&1
_scratch_xfs_repair >> $seqres.full 2>&1

echo "+ mount image (2)"
_scratch_mount

echo "+ chattr -R -i"
$CHATTR_PROG -R -f -i ${SCRATCH_MNT}/

echo "+ copy more (2)"
cp -p ${SCRATCH_MNT}/file1 ${SCRATCH_MNT}/file5 || \
	_fail "modified rmap tree"
umount ${SCRATCH_MNT}

echo "+ check fs (2)"
_scratch_xfs_repair -n >> $seqres.full 2>&1 || \
	_fail "xfs_repair should not fail"

status=0
exit
