tests/generic/181

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 181
#
# Test the convention that reflink with length == 0 means "to the end of fileA"
#   - Create a file.
#   - Try to reflink "zero" bytes.
#   - Check that the reflink happened.
#
. ./common/preamble
_begin_fstest auto quick clone

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

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

_require_test_reflink
_require_cp_reflink

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 0 $((blksz * 256)) $testdir/file1 >> $seqres.full
_pwrite_byte 0x62 0 $((blksz * 256)) $testdir/file2 >> $seqres.full
_pwrite_byte 0x62 0 $((blksz * 2)) $testdir/file2.chk >> $seqres.full
_pwrite_byte 0x61 $((blksz * 2)) $((blksz * 255)) $testdir/file2.chk >> $seqres.full
_reflink_range $testdir/file1 $blksz $testdir/file2 $((blksz * 2)) 0 >> $seqres.full
_test_cycle_mount

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

c1=$(_md5_checksum $testdir/file1)
c2=$(_md5_checksum $testdir/file2)

test ${c1} != ${c2} || echo "file1 and file2 should not match"

echo "Compare against check files"
cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk do not match"

# success, all done
status=0
exit