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https://github.com/linux-apfs/apfstests.git
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Nave Vardy
c024334d13
perform read operation on the target file while doing write or fpunch operations on the reflinks. Signed-off-by: Nave Vardy <nave.vardy@plexistor.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
94 lines
2.6 KiB
Bash
Executable File
94 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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# FS QA Test No. 415
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#
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# test for races between write or fpunch operations on reflinked files
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# to read operations on the target file
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#
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#-----------------------------------------------------------------------
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#
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# Copyright (c) 2017 Plexistor Ltd. 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=0 # success 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 -f $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/reflink
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_scratch_reflink
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_require_cp_reflink
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_scratch_mkfs >> $seqres.full 2>&1 || _fail "mkfs failed"
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_scratch_mount || _fail "mount failed"
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_require_fs_space $SCRATCH_MNT $((250 * 1024))
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echo "Silence is golden"
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workfile=${SCRATCH_MNT}/workfile
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light_clone=${SCRATCH_MNT}/light_clone
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file_size=$((10 * 1024 * 1024))
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bs=`_get_block_size $SCRATCH_MNT`
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block_num=$((file_size / bs))
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reflinks_num=20
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$XFS_IO_PROG -f -c "pwrite 0 $file_size" $workfile >> $seqres.full
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for ((i=1; i<=reflinks_num; i++)); do
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_cp_reflink $workfile ${light_clone}_$i
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done
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# for each block simultaneously pwrite (or fpunch) all reflinks
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# while performing pread from the targted file
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for ((block_index=0; block_index<block_num; block_index++)); do
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for ((i=1; i<=reflinks_num; i++)); do
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$XFS_IO_PROG -c "pread $((block_index * bs)) $bs" \
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$workfile >> $seqres.full &
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if [ $((block_index % 2)) -eq 0 ]; then
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$XFS_IO_PROG -c "pwrite $((block_index * bs)) $bs" \
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${light_clone}_$i >> $seqres.full &
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else
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$XFS_IO_PROG -c "fpunch $((block_index * bs)) $bs" \
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${light_clone}_$i >> $seqres.full &
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fi
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done
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# wait for all threads to join before moving to next block
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wait
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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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