#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Oracle, Inc.  All Rights Reserved.
#
# FS QA Test No. 414
#
# Check that reflinking adjacent blocks in a file produces a single
# block mapping extent.
#
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 7 15

_cleanup()
{
	cd /
	rm -rf $tmp.*
	wait
}

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

# real QA test starts here
_supported_fs generic
_require_scratch_reflink
_require_xfs_io_command "falloc"
_require_xfs_io_command "fiemap"

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

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

blocks=32
blksz=65536
sz=$((blocks * blksz))

echo "Create the original files"
$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file1 >> $seqres.full
_pwrite_byte 0x61 0 $sz $testdir/file1 >> $seqres.full
seq 0 $blksz $((sz - blksz)) | while read offset; do
	_reflink_range $testdir/file1 $offset $testdir/file2 $offset $blksz >> $seqres.full
done

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

echo "Check extent counts"
f1=$(_count_extents $testdir/file1)
f2=$(_count_extents $testdir/file2)
s1=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file1 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$')
s2=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file2 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$')

# Did the fs combine the extent mappings when we made f2?
test $f1 -eq $f2 || echo "f1 ($f1) != f2 ($f2)"
test $s1 -eq $s2 || echo "s1 ($s1) != s2 ($s2)"
test $f1 -eq $s1 || echo "f1 ($f1) != s1 ($f1)"
test $f2 -eq $s2 || echo "f2 ($f2) != s2 ($f2)"

_scratch_cycle_mount

echo "Compare files after remounting"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch

echo "Check extent counts"
f1=$(_count_extents $testdir/file1)
f2=$(_count_extents $testdir/file2)
s1=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file1 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$')
s2=$($XFS_IO_PROG -c 'fiemap -v' $testdir/file2 | awk '{print $5}' | grep -c '0x.*[2367aAbBfF]...$')

# Are the mappings still combined?
test $f1 -eq $f2 || echo "f1 ($f1) != f2 ($f2)"
test $s1 -eq $s2 || echo "s1 ($s1) != s2 ($s2)"
test $f1 -eq $s1 || echo "f1 ($f1) != s1 ($f1)"
test $f2 -eq $s2 || echo "f2 ($f2) != s2 ($f2)"

# success, all done
status=0
exit