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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 110
#
# Tests file clone functionality of btrfs ("reflinks"):
# - Reflink a file
# - Reflink the reflinked file
# - Modify the original file
# - Modify the reflinked file
#
. ./common/preamble
_begin_fstest auto quick clone fiemap
# Override the default cleanup function.
_cleanup()
{
cd /
rm -f $tmp.* $testdir
}
# Import common functions.
. common/filter
. common/reflink
# real QA test starts here
_require_test_reflink
_require_xfs_io_command "fiemap"
_require_cp_reflink
_require_test
testdir1=$TEST_DIR/test-$seq
rm -rf $testdir1
mkdir $testdir1
_checksum_files() {
for F in original copy1 copy2
do
md5sum $testdir1/$F | _filter_test_dir
done
}
echo "Create the original file and reflink to copy1, copy2"
$XFS_IO_PROG -f -c 'pwrite -S 0x61 0 9000' $testdir1/original \
>> $seqres.full 2>&1
cp --reflink $testdir1/original $testdir1/copy1
cp --reflink $testdir1/copy1 $testdir1/copy2
_verify_reflink $testdir1/original $testdir1/copy1
_verify_reflink $testdir1/original $testdir1/copy2
echo "Original md5sums:"
_checksum_files
echo "Overwrite original file with new data"
$XFS_IO_PROG -c 'pwrite -S 0x62 0 9000' $testdir1/original \
>> $seqres.full 2>&1
echo "md5sums after overwriting original:"
_checksum_files
echo "Overwrite copy1 with different new data"
$XFS_IO_PROG -c 'pwrite -S 0x63 0 9000' $testdir1/copy1 \
>> $seqres.full 2>&1
echo "md5sums after overwriting copy1:"
_checksum_files
# success, all done
status=0
exit
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