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https://github.com/linux-apfs/apfstests.git
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Filipe Manana
c0679253bc
Add a similar test to the existing one but with a file that has a hardlink as well. This is motivated by a bug found in btrfs where a fsync on a file that has the old name of another file results in the logging code to hit an infinite loop. The patch that fixes the bug in btrfs has the following subject: "Btrfs: fix infinite loop during fsync after rename operations" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
98 lines
3.2 KiB
Bash
Executable File
98 lines
3.2 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. 527
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#
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# Test that after a combination of file renames, deletions, linking and creating
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# new files with names that were previously deleted, if we fsync the new file,
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# after a power failure we are able to mount the filesystem and all file names
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# correspond to the correct inodes.
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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/testdir
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echo -n "foo" > $SCRATCH_MNT/testdir/fname1
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echo -n "hello" > $SCRATCH_MNT/testdir/fname2
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# For a different variant of the same test but when files have hardlinks too.
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mkdir $SCRATCH_MNT/testdir2
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echo -n "foo" > $SCRATCH_MNT/testdir2/zz
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ln $SCRATCH_MNT/testdir2/zz $SCRATCH_MNT/testdir2/zz_link
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echo -n "hello" > $SCRATCH_MNT/testdir2/a
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# Make sure everything done so far is durably persisted.
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sync
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# Rename, remove and link files such that one new name corresponds to the name
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# of a deleted file and one new file has the old name of the renamed file. Then
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# fsync only the new file.
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mv $SCRATCH_MNT/testdir/fname1 $SCRATCH_MNT/testdir/fname3
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rm -f $SCRATCH_MNT/testdir/fname2
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ln $SCRATCH_MNT/testdir/fname3 $SCRATCH_MNT/testdir/fname2
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echo -n "bar" > $SCRATCH_MNT/testdir/fname1
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/fname1
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# A second variant, more complex, that involves files with hardlinks too.
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# The following 3 renames are equivalent to a rename exchange (zz_link to a), but
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# without the atomicity which isn't required here.
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mv $SCRATCH_MNT/testdir2/a $SCRATCH_MNT/testdir2/tmp
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mv $SCRATCH_MNT/testdir2/zz_link $SCRATCH_MNT/testdir2/a
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mv $SCRATCH_MNT/testdir2/tmp $SCRATCH_MNT/testdir2/zz_link
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# The following rename and file creation are equivalent to a rename whiteout.
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mv $SCRATCH_MNT/testdir2/zz $SCRATCH_MNT/testdir2/a2
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echo -n "bar" > $SCRATCH_MNT/testdir2/zz
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# Fsync of zz should work and produce correct results after a power failure.
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir2/zz
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# Simulate a power failure and mount the filesystem to check that all file names
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# exist and correspond to the correct inodes.
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_flakey_drop_and_remount
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echo "File fname1 data after power failure: $(cat $SCRATCH_MNT/testdir/fname1)"
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echo "File fname2 data after power failure: $(cat $SCRATCH_MNT/testdir/fname2)"
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echo "File fname3 data after power failure: $(cat $SCRATCH_MNT/testdir/fname3)"
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echo "File a data after power failure: $(cat $SCRATCH_MNT/testdir2/a)"
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echo "File a2 data after power failure: $(cat $SCRATCH_MNT/testdir2/a2)"
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echo "File zz data after power failure: $(cat $SCRATCH_MNT/testdir2/zz)"
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echo "File zz_link data after power failure: $(cat $SCRATCH_MNT/testdir2/zz_link)"
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_unmount_flakey
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status=0
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exit
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