#! /bin/bash
# FS QA Test No. 210
#
# During reflink, XFS should carry the cowextsz setting to the destination file
# if the destination file size is less than the size of the source file, the
# length is the size of the source file, both offsets are zero, and the
# destination does not already have a cowextsz setting.  It should not do so
# otherwise.
#
#-----------------------------------------------------------------------
# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
}

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

# real QA test starts here
_supported_os Linux
_supported_fs xfs
_require_scratch_reflink
_require_cp_reflink
_require_fiemap
_require_xfs_io_command "cowextsize"

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

echo "Create initial file"
$XFS_IO_PROG -f -c "pwrite -S 0x61 0 131072" $testdir/file1 >> $seqres.full
$XFS_IO_PROG -c "cowextsize 1048576" $testdir/file1 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x61 0 1" $testdir/file4 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x61 0 262144" $testdir/file7 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x61 0 262144" $testdir/file9 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x61 0 262144" $testdir/file10 >> $seqres.full

echo "Reflink to an empty file"
_reflink_range $testdir/file1 0 $testdir/file2 0 0 >> $seqres.full

echo "Reflink to an empty file that already has cowextsz"
$XFS_IO_PROG -f -c "cowextsize 524288" $testdir/file3 >> $seqres.full
_reflink_range $testdir/file1 0 $testdir/file3 0 0 >> $seqres.full

echo "Reflink to a small file"
_reflink_range $testdir/file1 0 $testdir/file4 0 0 >> $seqres.full

echo "Reflink to a nonzero offset"
_reflink_range $testdir/file1 0 $testdir/file5 65536 0 >> $seqres.full

echo "Reflink from a nonzero offset"
_reflink_range $testdir/file1 65536 $testdir/file6 0 0 >> $seqres.full

echo "Reflink to a larger file"
_reflink_range $testdir/file1 0 $testdir/file7 0 0 >> $seqres.full

echo "Reflink less than the whole source file"
_reflink_range $testdir/file1 0 $testdir/file8 0 65536 >> $seqres.full

echo "cp reflink to a larger file"
_cp_reflink $testdir/file1 $testdir/file9 >> $seqres.full

echo "cp reflink to a larger file with cowextsize"
$XFS_IO_PROG -f -c "cowextsize 524288" $testdir/file10 >> $seqres.full
_cp_reflink $testdir/file1 $testdir/file10 >> $seqres.full

echo "Check cowextsz"
for i in `seq 1 10`; do
	$XFS_IO_PROG -c "cowextsize" $testdir/file$i | _filter_scratch
done

# success, all done
status=0
exit