2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
7 # Test that after a combination of file renames, deletions, linking and creating
8 # new files with names that were previously deleted, if we fsync the new file,
9 # after a power failure we are able to mount the filesystem and all file names
10 # correspond to the correct inodes.
13 seqres=$RESULT_DIR/$seq
14 echo "QA output created by $seq"
16 status=1 # failure is the default!
17 trap "_cleanup; exit \$status" 0 1 2 3 15
26 # get standard environment, filters and checks
31 # real QA test starts here
36 _require_dm_target flakey
40 _scratch_mkfs >>$seqres.full 2>&1
41 _require_metadata_journaling $SCRATCH_DEV
45 mkdir $SCRATCH_MNT/testdir
46 echo -n "foo" > $SCRATCH_MNT/testdir/fname1
47 echo -n "hello" > $SCRATCH_MNT/testdir/fname2
49 # For a different variant of the same test but when files have hardlinks too.
50 mkdir $SCRATCH_MNT/testdir2
51 echo -n "foo" > $SCRATCH_MNT/testdir2/zz
52 ln $SCRATCH_MNT/testdir2/zz $SCRATCH_MNT/testdir2/zz_link
53 echo -n "hello" > $SCRATCH_MNT/testdir2/a
55 # Make sure everything done so far is durably persisted.
58 # Rename, remove and link files such that one new name corresponds to the name
59 # of a deleted file and one new file has the old name of the renamed file. Then
60 # fsync only the new file.
61 mv $SCRATCH_MNT/testdir/fname1 $SCRATCH_MNT/testdir/fname3
62 rm -f $SCRATCH_MNT/testdir/fname2
63 ln $SCRATCH_MNT/testdir/fname3 $SCRATCH_MNT/testdir/fname2
64 echo -n "bar" > $SCRATCH_MNT/testdir/fname1
65 $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/fname1
67 # A second variant, more complex, that involves files with hardlinks too.
69 # The following 3 renames are equivalent to a rename exchange (zz_link to a), but
70 # without the atomicity which isn't required here.
71 mv $SCRATCH_MNT/testdir2/a $SCRATCH_MNT/testdir2/tmp
72 mv $SCRATCH_MNT/testdir2/zz_link $SCRATCH_MNT/testdir2/a
73 mv $SCRATCH_MNT/testdir2/tmp $SCRATCH_MNT/testdir2/zz_link
75 # The following rename and file creation are equivalent to a rename whiteout.
76 mv $SCRATCH_MNT/testdir2/zz $SCRATCH_MNT/testdir2/a2
77 echo -n "bar" > $SCRATCH_MNT/testdir2/zz
79 # Fsync of zz should work and produce correct results after a power failure.
80 $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir2/zz
82 # Simulate a power failure and mount the filesystem to check that all file names
83 # exist and correspond to the correct inodes.
84 _flakey_drop_and_remount
86 echo "File fname1 data after power failure: $(cat $SCRATCH_MNT/testdir/fname1)"
87 echo "File fname2 data after power failure: $(cat $SCRATCH_MNT/testdir/fname2)"
88 echo "File fname3 data after power failure: $(cat $SCRATCH_MNT/testdir/fname3)"
90 echo "File a data after power failure: $(cat $SCRATCH_MNT/testdir2/a)"
91 echo "File a2 data after power failure: $(cat $SCRATCH_MNT/testdir2/a2)"
92 echo "File zz data after power failure: $(cat $SCRATCH_MNT/testdir2/zz)"
93 echo "File zz_link data after power failure: $(cat $SCRATCH_MNT/testdir2/zz_link)"