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https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Dave Chinner
d7b517da5f
This test exposed a problem with mapped writes to the tail page of a file in XFS. Hence make it a generic test so taht we can ensure that all fielsystems handle the case correctly. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
124 lines
4.3 KiB
Bash
124 lines
4.3 KiB
Bash
#! /bin/bash
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# FS QA Test No. generic/029
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#
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# Test mapped writes against truncate down/up to ensure we get the data
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# correctly written. This can expose data corruption bugs on filesystems where
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# the block size is smaller than the page size.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2014 Red Hat, 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 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs generic
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_supported_os IRIX Linux
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_require_scratch
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testfile=$SCRATCH_MNT/testfile
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount
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# first case is just truncate down/truncate up to check that the mapped
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# write after the truncate up is correctly handled.
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$XFS_IO_PROG -t -f \
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-c "truncate 5120" `# truncate | |` \
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-c "pwrite -S 0x58 0 5120" `# write |XXXXXXXXXXXXXXXXXXXXXXXX|` \
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-c "mmap -rw 0 5120" `# mmap | |` \
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-c "mwrite -S 0x5a 2048 3072" `# mwrite | ZZZZZZZZZZZZZZ|` \
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-c "truncate 2048" `# truncate dn | |` \
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-c "truncate 5120" `# truncate up | |` \
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-c "mwrite -S 0x59 2048 3072" `# mwrite | YYYYYYYYYYYYYY|` \
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-c "close" \
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$testfile | _filter_xfs_io
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echo "==== Pre-Remount ==="
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hexdump -C $testfile
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_scratch_remount
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echo "==== Post-Remount =="
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hexdump -C $testfile
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rm -f $testfile
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sync
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# second case is to do a mwrite between the truncate to a block on the
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# same page we are truncating within the EOF. This checks that a mapped
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# write between truncate down and truncate up a further mapped
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# write to the same page into the new space doesn't result in data being lost.
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$XFS_IO_PROG -t -f \
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-c "truncate 5120" `# truncate | |` \
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-c "pwrite -S 0x58 0 5120" `# write |XXXXXXXXXXXXXXXXXXXXXXXX|` \
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-c "mmap -rw 0 5120" `# mmap | |` \
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-c "mwrite -S 0x5a 2048 3072" `# mwrite | ZZZZZZZZZZZZZZ|` \
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-c "truncate 2048" `# truncate dn | |` \
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-c "mwrite -S 0x57 1024 1024" `# mwrite | WWWWW |` \
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-c "truncate 5120" `# truncate up | |` \
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-c "mwrite -S 0x59 2048 3072" `# mwrite | YYYYYYYYYYYYYY|` \
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-c "close" \
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$testfile | _filter_xfs_io
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echo "==== Pre-Remount ==="
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hexdump -C $testfile
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_scratch_remount
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echo "==== Post-Remount =="
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hexdump -C $testfile
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# third case is the same as second case, just with non-1k aligned offsets and
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# sizes.
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$XFS_IO_PROG -t -f \
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-c "truncate 5121" `# truncate | |` \
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-c "pwrite -S 0x58 0 5121" `# write |XXXXXXXXXXXXXXXXXXXXXXXX|` \
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-c "mmap -rw 0 5121" `# mmap | |` \
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-c "mwrite -S 0x5a 2047 3071" `# mwrite | ZZZZZZZZZZZZZZ|` \
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-c "truncate 2047" `# truncate dn | |` \
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-c "mwrite -S 0x57 513 1025" `# mwrite | WWWWW |` \
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-c "truncate 5121" `# truncate up | |` \
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-c "mwrite -S 0x59 2047 3071" `# mwrite | YYYYYYYYYYYYYY|` \
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-c "close" \
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$testfile | _filter_xfs_io
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echo "==== Pre-Remount ==="
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hexdump -C $testfile
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_scratch_remount
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echo "==== Post-Remount =="
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hexdump -C $testfile
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status=0
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exit
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