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Filipe Manana
b665875fa5
Test that if we have a file with a hole, do a mix of direct IO and buffered writes to it and truncate the file to a size that lies in the middle of the hole, after unmounting and mounting again the filesystem, the file has a correct size and no data loss happened. This test is motivated by a bug found in btrfs when used with the no-holes feature (i.e. MKFS_OPTIONS="-O no-holes") which is fixed by the following patch for the linux kernel: Btrfs: fix data loss after truncate when using the no-holes feature [eguan: add _require_odirect] Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
77 lines
2.5 KiB
Bash
Executable File
77 lines
2.5 KiB
Bash
Executable File
#! /bin/bash
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# FSQA Test No. 412
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#
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# Test that if we have a file with a hole, do a mix of direct IO and buffered
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# writes to it and truncate the file to a size that lies in the middle of the
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# hole, after unmounting and mounting again the filesystem, the file has a
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# correct size and no data loss happened.
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#
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#-----------------------------------------------------------------------
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#
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# Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
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# Author: Filipe Manana <fdmanana@suse.com>
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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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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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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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_supported_fs generic
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_supported_os Linux
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_require_scratch
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_require_odirect
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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# Create out test file with two extents and a hole between those extents.
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# The extent that lies beyond the hole must be written using direct IO and later
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# we truncate the file to a size that lies within the hole's range.
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$XFS_IO_PROG -f -c "pwrite -S 0x01 0K 32K" $SCRATCH_MNT/foo | _filter_xfs_io
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$XFS_IO_PROG -d -c "pwrite -S 0x02 -b 32K 64K 32K" $SCRATCH_MNT/foo \
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| _filter_xfs_io
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# Now truncate our file to a smaller size that lies behind the offset used by
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# the previous direct IO write and that lies in a file hole.
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$XFS_IO_PROG -c "truncate 60K" $SCRATCH_MNT/foo
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# Now get file digests before unmounting the filesystem and after mounting it
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# again. The digests should match (same file data and size in both cases).
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echo "File digest before unmounting the filesystem:"
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md5sum $SCRATCH_MNT/foo | _filter_scratch
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_scratch_cycle_mount
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echo "File digest after mounting again the filesystem:"
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md5sum $SCRATCH_MNT/foo | _filter_scratch
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status=0
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exit
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