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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2015, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 150
#
# Ensure that reflinking a file N times doesn't eat a lot of blocks
# - Create a file and record fs block usage
# - Create some reflink copies
# - Compare fs block usage to before
#
. ./common/preamble
_begin_fstest auto quick clone
# Override the default cleanup function.
_cleanup()
{
cd /
rm -rf $tmp.* $testdir
}
# Import common functions.
. ./common/filter
. ./common/reflink
# real QA test starts here
_require_test_reflink
_require_cp_reflink
testdir=$TEST_DIR/test-$seq
rm -rf $testdir
mkdir $testdir
echo "Create the original file blocks"
blksz="$(_get_block_size $testdir)"
blks=2000
margin='15%'
sz=$((blksz * blks))
nr=7
filesize=$((blksz * nr))
_pwrite_byte 0x61 0 $sz $testdir/file1 >> $seqres.full
sync
free_blocks0=$(stat -f $testdir -c '%f')
echo "Create the reflink copies"
for i in `seq 2 $nr`; do
_cp_reflink $testdir/file1 $testdir/file.$i
done
_test_cycle_mount
free_blocks1=$(stat -f $testdir -c '%f')
_within_tolerance "free blocks after reflink" $free_blocks1 $free_blocks0 $margin -v
# success, all done
status=0
exit
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