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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 309
#
# Ensure that we can create enough distinct reflink entries to force creation
# of a multi-level refcount btree by reflinking a file a number of times and
# truncating the copies at successively lower sizes. Delete and recreate a few
# times to exercise the refcount btree grow/shrink functions.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=1 # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15
_cleanup()
{
cd /
_scratch_unmount > /dev/null 2>&1
rm -rf $tmp.*
}
# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/reflink
# real QA test starts here
_supported_fs xfs
_require_scratch_reflink
_require_cp_reflink
rm -f $seqres.full
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir
echo "Create the original file blocks"
blksz="$(_get_block_size $testdir)"
nr_blks=$((2 * blksz / 12))
for i in 1 2 x; do
_pwrite_byte 0x61 0 $((blksz * nr_blks)) $testdir/file1 >> $seqres.full
echo "$i: Reflink a bunch of times"
seq 1 $nr_blks | while read nr; do
_cp_reflink $testdir/file1 $testdir/file1.$nr >> $seqres.full
done
sync
echo "$i: Truncate files"
seq 1 $nr_blks | while read nr; do
truncate -s $((blksz * (nr_blks - nr))) $testdir/file1.$nr >> $seqres.full
done
_scratch_unmount
_check_scratch_fs
_scratch_mount
test $i = "x" && break
echo "$i: Delete both files"
rm -rf $testdir
mkdir -p $testdir
_scratch_unmount
_check_scratch_fs
_scratch_mount
done
# success, all done
status=0
exit