#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 242
#
# Reflink two large files and CoW them in big chunks.
#
# This test is dependent on the system page size, so we cannot use md5 in
# the golden output; we can only compare to a check file.
#
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 -rf $tmp.* $testdir
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/reflink

# real QA test starts here
_require_scratch_reflink
_require_cp_reflink

rm -f $seqres.full


echo "Format and mount"
_scratch_mkfs > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1

testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir

blksz=65536
nr=6400
filesize=$((blksz * nr))
bufnr=1280
bufsize=$((blksz * bufnr))

free_blocks=$(stat -f -c '%a' $testdir)
real_blksz=$(_get_block_size $testdir)
space_needed=$(((filesize * 3) * 5 / 4))
space_avail=$((free_blocks * real_blksz))
test $space_needed -gt $space_avail && _notrun "Not enough space. $space_avail < $space_needed"

echo "Create the original files"
$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file2.chk >> $seqres.full
_scratch_cycle_mount

echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch
md5sum $testdir/file2.chk | _filter_scratch

echo "CoW and unmount"
$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2.chk >> $seqres.full
_scratch_cycle_mount

echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch
md5sum $testdir/file2.chk | _filter_scratch

# success, all done
status=0
exit