#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
#
# FS QA Test No. 126
#
# Create and populate an XFS filesystem, corrupt a leaf xattr's data extent,
# then see how the kernel and xfs_repair deal with it.
#
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

_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="$((8 * blksz / 40))"

echo "+ make some files"
touch "${SCRATCH_MNT}/attrfile"
seq 0 "${nr}" | while read d; do
	setfattr -n "user.x$(printf "%.08d" "$d")" -v "0000000000000000" "${SCRATCH_MNT}/attrfile"
done
seq 1 2 "${nr}" | while read d; do
	setfattr -x "user.x$(printf "%.08d" "$d")" "${SCRATCH_MNT}/attrfile"
done
inode="$(stat -c '%i' "${SCRATCH_MNT}/attrfile")"
umount "${SCRATCH_MNT}"

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

echo "+ check xattr"
_scratch_xfs_db -x -c "inode ${inode}" -c "bmap" >> $seqres.full
_scratch_xfs_db -x -c "inode ${inode}" -c "ablock 0" -c "stack" | grep -q 'file attr block is unmapped' && _fail "failed to create a leaf xattr (index)"
_scratch_xfs_db -x -c "inode ${inode}" -c "ablock 1" -c "stack" | grep -q 'file attr block is unmapped' && _fail "failed to create a leaf xattr (data)"

echo "+ corrupt xattr"
loff=1
while true; do
	_scratch_xfs_db -x -c "inode ${inode}" -c "ablock ${loff}" -c "stack" | grep -q 'file attr block is unmapped' && break
	_scratch_xfs_db -x -c "inode ${inode}" -c "ablock ${loff}" -c "stack" -c "blocktrash -o 4 -x 32 -y $((blksz * 8)) -z ${FUZZ_ARGS}" >> $seqres.full
	loff="$((loff + 1))"
done

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

	setfattr -x "user.x00000000" "${SCRATCH_MNT}/attrfile" 2> /dev/null && _fail "modified corrupt xattr"
	umount "${SCRATCH_MNT}"
fi

echo "+ repair fs"
_scratch_xfs_repair >> $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 "+ modify xattr (2)"
getfattr "${SCRATCH_MNT}/attrfile" -n "user.x00000000" 2> /dev/null && (setfattr -x "user.x00000000" "${SCRATCH_MNT}/attrfile" || _fail "modified corrupt xattr")
umount "${SCRATCH_MNT}"

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

status=0
exit