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https://github.com/linux-apfs/apfstests.git
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Darrick J. Wong
9184ca155d
Perform copy-on-writes at random offsets to stress the CoW allocation system. Assess the effectiveness of the extent size hint at combatting fragmentation via unshare, a rewrite, and no-op after the random writes. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
109 lines
3.5 KiB
Bash
Executable File
109 lines
3.5 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 210
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#
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# During reflink, XFS should carry the cowextsz setting to the destination file
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# if the destination file size is less than the size of the source file, the
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# length is the size of the source file, both offsets are zero, and the
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# destination does not already have a cowextsz setting. It should not do so
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# otherwise.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2016, Oracle and/or its affiliates. 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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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 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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}
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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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_supported_fs xfs
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_require_scratch_reflink
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_require_cp_reflink
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_require_fiemap
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_require_xfs_io_command "cowextsize"
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rm -f $seqres.full
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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 $testdir
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echo "Create initial file"
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$XFS_IO_PROG -f -c "pwrite -S 0x61 0 131072" $testdir/file1 >> $seqres.full
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$XFS_IO_PROG -c "cowextsize 1048576" $testdir/file1 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x61 0 1" $testdir/file4 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x61 0 262144" $testdir/file7 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x61 0 262144" $testdir/file9 >> $seqres.full
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$XFS_IO_PROG -f -c "pwrite -S 0x61 0 262144" $testdir/file10 >> $seqres.full
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echo "Reflink to an empty file"
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_reflink_range $testdir/file1 0 $testdir/file2 0 0 >> $seqres.full
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echo "Reflink to an empty file that already has cowextsz"
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$XFS_IO_PROG -f -c "cowextsize 524288" $testdir/file3 >> $seqres.full
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_reflink_range $testdir/file1 0 $testdir/file3 0 0 >> $seqres.full
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echo "Reflink to a small file"
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_reflink_range $testdir/file1 0 $testdir/file4 0 0 >> $seqres.full
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echo "Reflink to a nonzero offset"
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_reflink_range $testdir/file1 0 $testdir/file5 65536 0 >> $seqres.full
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echo "Reflink from a nonzero offset"
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_reflink_range $testdir/file1 65536 $testdir/file6 0 0 >> $seqres.full
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echo "Reflink to a larger file"
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_reflink_range $testdir/file1 0 $testdir/file7 0 0 >> $seqres.full
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echo "Reflink less than the whole source file"
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_reflink_range $testdir/file1 0 $testdir/file8 0 65536 >> $seqres.full
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echo "cp reflink to a larger file"
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_cp_reflink $testdir/file1 $testdir/file9 >> $seqres.full
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echo "cp reflink to a larger file with cowextsize"
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$XFS_IO_PROG -f -c "cowextsize 524288" $testdir/file10 >> $seqres.full
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_cp_reflink $testdir/file1 $testdir/file10 >> $seqres.full
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echo "Check cowextsz"
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for i in `seq 1 10`; do
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$XFS_IO_PROG -c "cowextsize" $testdir/file$i | _filter_scratch
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done
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# success, all done
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status=0
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exit
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