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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. 029
#
# Check if creating a sparse copy ("reflink") of a file on btrfs
# expectedly fails when it's done between different filesystems but
# not for different mount points of the same filesystem.
#
# For both situations, these actions are executed:
# - Copy a file with the reflink=auto option.
# A normal copy should be created.
# - Copy a file with the reflink=always option. Should result in
# error for different file systems, but succeed for the same fs
# but different mount points.
#
. ./common/preamble
_begin_fstest auto quick clone
. ./common/filter
. ./common/reflink
_supported_fs btrfs
_require_test
_require_scratch
_require_cp_reflink
reflink_test_dir=$TEST_DIR/test-$seq
rm -rf $reflink_test_dir
mkdir $reflink_test_dir
orig_file=$SCRATCH_MNT/original
copy_file=$reflink_test_dir/copy
_scratch_mkfs > /dev/null 2>&1
_scratch_mount
$XFS_IO_PROG -f -c 'pwrite -S 0x61 0 9000' $orig_file >> $seqres.full
echo "test reflinks across different devices"
# auto reflink, should fall back to non-reflink
rm -rf $copy_file
echo "reflink=auto:"
cp --reflink=auto $orig_file $copy_file
md5sum $orig_file | _filter_testdir_and_scratch
md5sum $copy_file | _filter_testdir_and_scratch
# always reflink, should fail outright
rm -rf $copy_file
echo "reflink=always:"
cp --reflink=always $orig_file $copy_file >> $seqres.full 2>&1 || echo "cp reflink failed"
# The failed target gets created with zero sizes by cp(1) version 8.32. But in
# older cp(1) version 8.30 target file is not created when the cp
# --reflink=always fails.
ls $copy_file >> $seqres.full 2>&1
echo "test reflinks across different mountpoints of same device"
rm -rf $reflink_test_dir/*
_mount $SCRATCH_DEV $reflink_test_dir
echo "reflink=auto:"
cp --reflink=auto $orig_file $copy_file
md5sum $orig_file | _filter_testdir_and_scratch
md5sum $copy_file | _filter_testdir_and_scratch
# always reflink, should fail outright
rm -rf $copy_file
echo "reflink=always:"
cp --reflink=always $orig_file $copy_file >> $seqres.full 2>&1 || echo "cp reflink failed"
md5sum $orig_file | _filter_testdir_and_scratch
md5sum $copy_file | _filter_testdir_and_scratch
$UMOUNT_PROG $reflink_test_dir
# success, all done
status=0
exit
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