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https://github.com/linux-apfs/apfstests.git
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Filipe Manana
2348063442
Test that if we punch a hole in a file, with either a range that goes beyond the file's size or covers a file range that is already a hole, and that if after we do some buffered write operations that cover different parts of the hole, no warnings are emmitted in syslog/dmesg and the file's content is correct after remounting the filesystem. This test is motivated by a bug in btrfs that is manifested in kernel 4.12-rc1 onwards (the bug existed long time ago but was not so easy to expose before 4.12-rc1). The btrfs patch that fixes the issue is titled: "Btrfs: fix invalid extent maps due to hole punching". Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
81 lines
2.5 KiB
Bash
Executable File
81 lines
2.5 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. generic/439
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#
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# Test that if we punch a hole in a file, with either a range that goes beyond
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# the file's size or covers a file range that is already a hole, and that if
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# after we do some buffered write operations that cover different parts of the
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# hole, no warnings are emmitted in syslog/dmesg and the file's content is
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# correct after remounting the filesystem.
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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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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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_supported_fs generic
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_supported_os Linux
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_require_test
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_require_scratch
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_require_xfs_io_command "fpunch"
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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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$XFS_IO_PROG -f -c "pwrite -S 0xaa 0 100K" $SCRATCH_MNT/f | _filter_xfs_io
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$XFS_IO_PROG -c "fpunch 60K 90K" $SCRATCH_MNT/f
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$XFS_IO_PROG -c "pwrite -S 0xbb -b 100K 50K 100K" $SCRATCH_MNT/f | _filter_xfs_io
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$XFS_IO_PROG -c "pwrite -S 0xcc -b 50K 100K 50K" $SCRATCH_MNT/f | _filter_xfs_io
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$XFS_IO_PROG -f -c "fpunch 695K 820K" $SCRATCH_MNT/f2
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$XFS_IO_PROG -c "pwrite -S 0xaa 1008K 307K" $SCRATCH_MNT/f2 | _filter_xfs_io
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$XFS_IO_PROG -c "pwrite -S 0xbb -b 630K 1073K 630K" $SCRATCH_MNT/f2 \
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| _filter_xfs_io
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$XFS_IO_PROG -c "pwrite -S 0xcc -b 459K 1068K 459K" $SCRATCH_MNT/f2 \
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| _filter_xfs_io
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_scratch_cycle_mount
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echo "File f contents after remounting filesystem:"
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od -t x1 $SCRATCH_MNT/f
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echo "File f2 contents after remounting filesystem:"
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od -t x1 $SCRATCH_MNT/f2
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status=0
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exit
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