tests/xfs/120

#! /bin/bash
# FS QA Test No. 120
#
# Create and populate an XFS filesystem, corrupt the bmbt, then see how
# the kernel and xfs_repair deal with it.
#
#-----------------------------------------------------------------------
# Copyright (c) 2015 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  02110-1301  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
. ./common/populate

# real QA test starts here
_supported_fs xfs
_supported_os Linux

_require_scratch
test -n "${FORCE_FUZZ}" || _require_scratch_xfs_crc
_require_attrs
_require_populate_commands
_require_xfs_db_blocktrash_z_command
test -z "${FUZZ_ARGS}" && FUZZ_ARGS="-n 8 -3"

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}")"
nr="$((blksz * 2 / 16))"

echo "+ make some files"
$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((blksz * nr))" -c 'fsync' "${SCRATCH_MNT}/bigfile" >> $seqres.full
for i in $(seq 1 2 ${nr}); do
	$XFS_IO_PROG -f -c "fpunch $((i * blksz)) ${blksz}" "${SCRATCH_MNT}/bigfile" >> $seqres.full
done
inode="$(stat -c '%i' "${SCRATCH_MNT}/bigfile")"
umount "${SCRATCH_MNT}"

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

echo "+ corrupt image"
_scratch_xfs_db -x -c "inode ${inode}" -c "addr u.bmbt.ptrs[1]" -c "addr u3.bmbt.ptrs[1]" -c "stack" -c "blocktrash -x 32 -y $((blksz * 8)) -z ${FUZZ_ARGS}" >> $seqres.full

echo "+ mount image"
if _try_scratch_mount >> $seqres.full 2>&1; then

	echo "+ modify files"
	before="$(stat -c '%b' "${SCRATCH_MNT}/bigfile")"
	$XFS_IO_PROG -f -c "pwrite -S 0x62 ${blksz} ${blksz}" -c 'fsync' "${SCRATCH_MNT}/bigfile" >> $seqres.full 2> /dev/null
	after="$(stat -c '%b' "${SCRATCH_MNT}/bigfile")"
	test "${before}" -eq "${after}" || _fail "pwrite should fail on corrupt bmbt"
	umount "${SCRATCH_MNT}"
fi

echo "+ repair fs"
_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 "+ modify files (2)"
touch "${SCRATCH_MNT}/bigfile"
before="$(stat -c '%b' "${SCRATCH_MNT}/bigfile")"
$XFS_IO_PROG -f -c "pwrite -S 0x62 ${blksz} ${blksz}" -c 'fsync' "${SCRATCH_MNT}/bigfile" >> $seqres.full 2> /dev/null
after="$(stat -c '%b' "${SCRATCH_MNT}/bigfile")"
test "${before}" -ne "${after}" || _fail "pwrite failed after fixing corrupt bmbt"
umount "${SCRATCH_MNT}"

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

status=0
exit