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Filipe Manana
8694a9b144
Test that if we truncate a file to reduce its size, rename it and then fsync it, after a power failure the file has a correct size and name. This test is motivated by a bug found in btrfs, which is fixed by a patch for the linux kernel titled: "Btrfs: fix incorrect file size after shrinking truncate and fsync" This test currently passes on ext4, xfs, f2fs and patched btrfs. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
67 lines
1.6 KiB
Bash
Executable File
67 lines
1.6 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 534
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#
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# Test that if we truncate a file to reduce its size, rename it and then fsync
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# it, after a power failure the file has a correct size and name.
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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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_cleanup_flakey
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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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. ./common/dmflakey
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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_dm_target flakey
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rm -f $seqres.full
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_scratch_mkfs >>$seqres.full 2>&1
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_require_metadata_journaling $SCRATCH_DEV
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_init_flakey
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_mount_flakey
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# Create our test file with an initial size of 8000 bytes, then fsync it,
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# followed by a truncate that reduces its size down to 3000 bytes.
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$XFS_IO_PROG -f -c "pwrite -S 0xab 0 8000" \
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-c "fsync" \
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-c "truncate 3000" \
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$SCRATCH_MNT/foo | _filter_xfs_io
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# Now rename the file and fsync it again.
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mv $SCRATCH_MNT/foo $SCRATCH_MNT/bar
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/bar
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# Simulate a power failure and mount the filesystem to check that the file was
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# persisted with the new name and has a size of 3000 bytes.
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_flakey_drop_and_remount
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[ -f $SCRATCH_MNT/bar ] || echo "file name 'bar' is missing"
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[ -f $SCRATCH_MNT/foo ] && echo "file name 'foo' still exists"
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echo "File content after power failure:"
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od -A d -t x1 $SCRATCH_MNT/bar
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_unmount_flakey
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status=0
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exit
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