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https://github.com/linux-apfs/apfstests.git
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Darrick J. Wong
44b9337e09
Ensure that we can handle the case where the refcount stays the same even though the actual sharers changes. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <eguan@redhat.com>
95 lines
2.7 KiB
Bash
Executable File
95 lines
2.7 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 359
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#
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# Make sure that the reference counting mechanism can handle the case
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# where we share the first 1/4 of an extent with a file, share the
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# last 1/4 of the extent with a second file, share the first half of
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# the extent with N files, and share the second half of the extent
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# with a different set of N files. The key point here is to test that
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# we handle the case where a refcount extent record doesn't coincide
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# exactly with the block mapping records.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2016 Oracle, Inc. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 7 15
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_cleanup()
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{
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cd /
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rm -rf $tmp.*
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wait
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/reflink
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# real QA test starts here
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_supported_os Linux
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_require_scratch_reflink
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echo "Format and mount"
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_scratch_mkfs > $seqres.full 2>&1
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_scratch_mount >> $seqres.full 2>&1
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testdir=$SCRATCH_MNT/test-$seq
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mkdir $testdir
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blocks=64
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blksz=65536
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nr=4
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halfway=$((blocks / 2 * blksz))
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quarter=$((blocks / 4 * blksz))
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echo "Initialize file"
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_pwrite_byte 0x61 0 $((blocks * blksz)) $testdir/file >> $seqres.full
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echo "Share the first half of the extent"
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seq 1 $nr | while read nr; do
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_reflink_range $testdir/file 0 $testdir/file$nr.0 0 $halfway >> $seqres.full
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done
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echo "Share the last half of the extent"
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seq 1 $nr | while read nr; do
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_reflink_range $testdir/file $halfway $testdir/file$nr.1 0 $halfway >> $seqres.full
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done
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echo "Share the first quarter of the extent"
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_reflink_range $testdir/file 0 $testdir/file.2 0 $quarter >> $seqres.full
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echo "Share the last quarter of the extent"
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_reflink_range $testdir/file $((quarter * 3)) $testdir/file.3 0 $quarter >> $seqres.full
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_scratch_cycle_mount
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echo "Check output"
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md5sum $testdir/file $testdir/file* | _filter_scratch
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# success, all done
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status=0
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exit
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