#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Oracle. All Rights Reserved.
#
# FS QA Test 204
#
# Test if the unaligned (by size and offset) punch hole is successful when FS
# is at ENOSPC.
#
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

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here

# Modify as appropriate.
_supported_fs btrfs
_require_scratch
_require_xfs_io_command "fpunch"

_scratch_mkfs_sized $((256 * 1024 *1024)) >> $seqres.full

# max_inline ensures data is not inlined within metadata extents
_scratch_mount "-o max_inline=0,nodatacow"

cat /proc/self/mounts | grep $SCRATCH_DEV >> $seqres.full
$BTRFS_UTIL_PROG filesystem df $SCRATCH_MNT >> $seqres.full

extent_size=$(_scratch_btrfs_sectorsize)
unalign_by=512
echo extent_size=$extent_size unalign_by=$unalign_by >> $seqres.full

$XFS_IO_PROG -f -c "pwrite -S 0xab 0 $((extent_size * 10))" \
					$SCRATCH_MNT/testfile >> $seqres.full

echo "Fill all space available for data and all unallocated space." >> $seqres.full
dd status=none if=/dev/zero of=$SCRATCH_MNT/filler bs=512 >> $seqres.full 2>&1

hole_offset=0
hole_len=$unalign_by
$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile

hole_offset=$(($extent_size + $unalign_by))
hole_len=$(($extent_size - $unalign_by))
$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile

hole_offset=$(($extent_size * 2 + $unalign_by))
hole_len=$(($extent_size * 5))
$XFS_IO_PROG -c "fpunch $hole_offset $hole_len" $SCRATCH_MNT/testfile

# success, all done
echo "Silence is golden"
status=0
exit