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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Oracle, Inc. All Rights Reserved.
#
# FS QA Test No. 358
#
# Share an extent amongst a bunch of files such that the refcount
# stays the same while the rate of change of the set of owners is
# steadily increasing. For example, an extent of 32 blocks is owned
# by 32 files. At block 1, change one of the owners. At block 2,
# change 2 of the owners, and so on.
#
. ./common/preamble
_begin_fstest auto quick clone
_register_cleanup "_cleanup" BUS
# Override the default cleanup function.
_cleanup()
{
cd /
rm -rf $tmp.*
wait
}
# Import common functions.
. ./common/filter
. ./common/reflink
# real QA test starts here
_require_scratch_reflink
echo "Format and mount"
_scratch_mkfs > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1
testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir
blocks=64
blksz=65536
_require_congruent_file_oplen $SCRATCH_MNT $blksz
echo "Initialize file"
_pwrite_byte 0x61 0 $((blocks * blksz)) $testdir/file >> $seqres.full
echo "Share the file n-ways"
seq 1 $((blocks - 1)) | while read nr; do
_reflink_range $testdir/file 0 $testdir/file$nr.0 0 $((nr * blksz)) >> $seqres.full
seq $nr $((blocks - 1)) | while read nnr; do
_reflink_range $testdir/file $((nnr * blksz)) $testdir/file$nr.$nnr $((nnr * blksz)) $blksz >> $seqres.full
done
done
_scratch_cycle_mount
echo "Check output"
md5sum $testdir/file $testdir/file*.0 | _filter_scratch
# success, all done
status=0
exit
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