#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 121
#
# Ensure that we can dedupe parts of two files:
#   - Dedupe identical parts of two identical files
#   - Check that still have identical contents
#
. ./common/preamble
_begin_fstest auto quick clone dedupe

# Override the default cleanup function.
_cleanup()
{
    cd /
    rm -rf $tmp.* $testdir
}

# Import common functions.
. ./common/filter
. ./common/reflink

# real QA test starts here
_require_test_dedupe

testdir=$TEST_DIR/test-$seq
rm -rf $testdir
mkdir $testdir

echo "Create the original files"
blksz=65536
_require_congruent_file_oplen $TEST_DIR $blksz
_pwrite_byte 0x61 $((blksz * 2)) $((blksz * 6)) $testdir/file1 >> $seqres.full
_pwrite_byte 0x61 $((blksz * 2)) $((blksz * 6)) $testdir/file2 >> $seqres.full
_test_cycle_mount

md5sum $testdir/file1 | _filter_test_dir
md5sum $testdir/file2 | _filter_test_dir

_compare_range $testdir/file1 0 $testdir/file2 0 $((blksz * 8)) \
       || echo "Files 1-2 do not match (intentional)"

echo "Dedupe the middle blocks together"
free_before=$(stat -f -c '%a' $testdir)
_dedupe_range $testdir/file1 $((blksz * 4)) $testdir/file2 \
		$((blksz * 4)) $((blksz * 2)) >> $seqres.full
_test_cycle_mount
free_after=$(stat -f -c '%a' $testdir)
echo "freesp changed by $free_before -> $free_after" >> $seqres.full

echo "Compare sections"
md5sum $testdir/file1 | _filter_test_dir
md5sum $testdir/file2 | _filter_test_dir

_compare_range $testdir/file1 0 $testdir/file2 0 $((blksz * 4)) \
       || echo "Start sections do not match"

_compare_range $testdir/file1 $((blksz * 4)) $testdir/file2 \
		$((blksz * 4)) $((blksz * 2)) \
       || echo "Middle sections do not match"

_compare_range $testdir/file1 $((blksz * 6)) $testdir/file2 \
		$((blksz * 6)) $((blksz * 2)) \
       || echo "End sections do not match"

# success, all done
status=0
exit