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https://github.com/linux-apfs/apfstests.git
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Dave Chinner
cf89aed924
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
92 lines
2.8 KiB
Bash
Executable File
92 lines
2.8 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 073
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#
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# Test file A fsync after moving one other unrelated file B between directories
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# and fsyncing B's old parent directory before fsyncing the file A. Check that
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# after a crash all the file A data we fsynced is available.
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#
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# This test is motivated by an issue discovered in btrfs which caused the file
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# data to be lost (despite fsync returning success to user space). That btrfs
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# bug was fixed by the following linux kernel patch:
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#
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# Btrfs: fix data loss in the fast fsync path
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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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_cleanup()
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{
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_cleanup_flakey
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rm -f $tmp.*
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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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 $SCRATCH_DEV
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_init_flakey
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_mount_flakey
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# Create our main test file 'foo', the one we check for data loss.
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# By doing an fsync against our file, it makes btrfs clear the 'needs_full_sync'
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# bit from its flags (btrfs inode specific flags).
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$XFS_IO_PROG -f -c "pwrite -S 0xaa 0 8K" \
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-c "fsync" $SCRATCH_MNT/foo | _filter_xfs_io
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# Now create one other file and 2 directories. We will move this second file
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# from one directory to the other later because it forces btrfs to commit its
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# currently open transaction if we fsync the old parent directory. This is
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# necessary to trigger the data loss bug that affected btrfs.
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mkdir $SCRATCH_MNT/testdir_1
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touch $SCRATCH_MNT/testdir_1/bar
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mkdir $SCRATCH_MNT/testdir_2
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# Make sure everything is durably persisted.
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sync
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# Write more 8Kb of data to our file.
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$XFS_IO_PROG -c "pwrite -S 0xbb 8K 8K" $SCRATCH_MNT/foo | _filter_xfs_io
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# Move our 'bar' file into a new directory.
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mv $SCRATCH_MNT/testdir_1/bar $SCRATCH_MNT/testdir_2/bar
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# Fsync our first directory. Because it had a file moved into some other
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# directory, this made btrfs commit the currently open transaction. This is
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# a condition necessary to trigger the data loss bug.
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir_1
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# Now fsync our main test file. If the fsync succeeds, we expect the 8Kb of
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# data we wrote previously to be persisted and available if a crash happens.
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# This did not happen with btrfs, because of the transaction commit that
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# happened when we fsynced the parent directory.
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/foo
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_flakey_drop_and_remount
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# Now check that all data we wrote before are available.
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echo "File content after log replay:"
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od -t x1 $SCRATCH_MNT/foo
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status=0
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exit
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