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https://github.com/linux-apfs/apfstests.git
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Filipe Manana
8e38c06860
Test that if we create a new hard link for a file which was previously fsync'ed, fsync a parent directory of the new hard link and power fail, the parent directory exists after mounting the filesystem again. The parent directory must be a new directory, not yet persisted. This test is motivated by a bug found in btrfs, where the fsync'ed parent directory was lost after a power failure. The bug in btrfs is fixed by a patch for the linux kernel titled: "Btrfs: sync log after logging new name" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
66 lines
1.5 KiB
Bash
Executable File
66 lines
1.5 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 498
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#
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# Test that if we create a new hard link for a file which was previously
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# fsync'ed, fsync a parent directory of the new hard link and power fail,
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# the parent directory exists after mounting the filesystem again.
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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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mkdir $SCRATCH_MNT/A
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mkdir $SCRATCH_MNT/B
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mkdir $SCRATCH_MNT/A/C
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touch $SCRATCH_MNT/B/foo
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/B/foo
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# It is important the new hard link is located in a hierarchy of new directories
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# (not yet persisted).
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ln $SCRATCH_MNT/B/foo $SCRATCH_MNT/A/C/foo
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/A
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# Simulate a power failure and mount the filesystem to check that what we
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# explicitly fsync'ed exists.
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_flakey_drop_and_remount
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[ -d $SCRATCH_MNT/A ] || echo "directory A missing"
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[ -f $SCRATCH_MNT/B/foo ] || echo "file B/foo is missing"
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_unmount_flakey
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_cleanup_flakey
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echo "Silence is golden"
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status=0
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exit
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