mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
22b06b010c
Add a test to make sure that we can handle multiple memory mappings to a physical storage extent shared by multiple files, and that we can handle the copy on write operation without error. Make sure we can also handle mappings at different offsets in the page cache. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
106 lines
2.8 KiB
Bash
Executable File
106 lines
2.8 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0-or-newer
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# Copyright (c) 2019, Oracle and/or its affiliates. All Rights Reserved.
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#
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# FS QA Test No. 578
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#
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# Make sure that we can handle multiple mmap writers to the same file.
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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.* $testdir
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/reflink
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# real QA test starts here
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_supported_os Linux
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_supported_fs generic
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_require_test_program "mmap-write-concurrent"
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_require_command "$FILEFRAG_PROG" filefrag
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_require_test_reflink
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_require_cp_reflink
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rm -f $seqres.full
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compare() {
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for i in $(seq 1 8); do
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md5sum $testdir/file$i | _filter_test_dir
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echo $testdir/file$i >> $seqres.full
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od -tx1 -Ad -c $testdir/file$i >> $seqres.full
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done
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}
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testdir=$TEST_DIR/test-$seq
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rm -rf $testdir
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mkdir $testdir
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echo "Create the original files"
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blksz=65536
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filesz=$((blksz * 4))
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_pwrite_byte 0x61 0 $filesz $testdir/file1 >> $seqres.full
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_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
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_cp_reflink $testdir/file1 $testdir/file3 >> $seqres.full
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_cp_reflink $testdir/file1 $testdir/file4 >> $seqres.full
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_reflink_range $testdir/file1 0 $testdir/file5 $blksz $filesz >> $seqres.full
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_reflink_range $testdir/file1 0 $testdir/file6 $((blksz * 2)) $filesz >> $seqres.full
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_reflink_range $testdir/file1 0 $testdir/file7 $((blksz * 3)) $filesz >> $seqres.full
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_reflink_range $testdir/file1 0 $testdir/file8 $((blksz * 4)) $filesz >> $seqres.full
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_test_cycle_mount
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echo "Compare files before cow" | tee -a $seqres.full
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compare
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echo "mwrite all copies" | tee -a $seqres.full
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off=$(( (filesz / 2) - 168 ))
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len=337
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$here/src/mmap-write-concurrent $len \
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$off $testdir/file1 \
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$off $testdir/file2 \
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$off $testdir/file3 \
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$off $testdir/file4 \
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$((off + blksz)) $testdir/file5 \
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$((off + (blksz * 2))) $testdir/file6 \
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$((off + (blksz * 3))) $testdir/file7 \
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$((off + (blksz * 4))) $testdir/file8 \
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168 $testdir/file1 \
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$((blksz - 168)) $testdir/file2 \
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$((filesz - 777)) $testdir/file3 \
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$(((blksz * 3) - 168)) $testdir/file4 \
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echo "Compare files before remount" | tee -a $seqres.full
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compare
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_test_cycle_mount
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echo "Compare files after remount" | tee -a $seqres.full
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compare
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echo "Check for non-shared extents" | tee -a $seqres.full
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$FILEFRAG_PROG -v $testdir/file1 $testdir/file2 $testdir/file3 $testdir/file4 \
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$testdir/file5 $testdir/file6 $testdir/file7 $testdir/file8 \
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| grep '^[[:space:]]*[0-9]*:' > $testdir/fiemap
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cat $testdir/fiemap >> $seqres.full
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grep -q 'shared' $testdir/fiemap || \
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echo "Expected to find shared extents"
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grep -q -v 'shared' $testdir/fiemap || \
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echo "Expected to find non-shared extents"
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# success, all done
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status=0
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exit
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