2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
7 # Test that a file fsync works after punching a hole for the same file range
8 # multiple times and that after log/journal replay the file's content is
11 # This test is motivated by a bug found in btrfs.
14 seqres=$RESULT_DIR/$seq
15 echo "QA output created by $seq"
17 status=1 # failure is the default!
18 trap "_cleanup; exit \$status" 0 1 2 3 15
27 # get standard environment, filters and checks
33 # real QA test starts here
37 _require_xfs_io_command "fpunch"
38 _require_xfs_io_command "fiemap"
39 _require_dm_target flakey
43 _scratch_mkfs >>$seqres.full 2>&1
44 _require_metadata_journaling $SCRATCH_DEV
48 BLOCK_SIZE=$(_get_file_block_size $SCRATCH_MNT)
50 # Create out test file with some data and then fsync it.
51 # We do the fsync only to make sure the last fsync we do in this test triggers
52 # the fast code path of btrfs' fsync implementation, a condition necessary to
53 # trigger the bug btrfs had.
54 $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K $(($BLOCK_SIZE * 32))" \
56 $SCRATCH_MNT/foobar | _filter_xfs_io_blocks_modified
58 # Now punch a hole against the range [96K, 128K[.
59 $XFS_IO_PROG -c "fpunch $(($BLOCK_SIZE * 24)) $(($BLOCK_SIZE * 8))" $SCRATCH_MNT/foobar
61 # Punch another hole against a range that overlaps the previous range and ends
63 $XFS_IO_PROG -c "fpunch $(($BLOCK_SIZE * 16)) $(($BLOCK_SIZE * 32))" $SCRATCH_MNT/foobar
65 # Punch another hole against a range that overlaps the first range ([96K, 128K[)
67 $XFS_IO_PROG -c "fpunch $(($BLOCK_SIZE * 8)) $(($BLOCK_SIZE * 24))" $SCRATCH_MNT/foobar
69 # Fsync our file. We want to verify that, after a power failure and mounting the
70 # filesystem again, the file content reflects all the hole punch operations.
71 $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/foobar
73 echo "File digest before power failure:"
74 od -t x1 $SCRATCH_MNT/foobar | _filter_od
76 echo "Fiemap before power failure:"
77 $XFS_IO_PROG -c "fiemap -v" $SCRATCH_MNT/foobar | _filter_fiemap $BLOCK_SIZE
79 _flakey_drop_and_remount
81 echo "File digest after log replay:"
82 # Must match the same digest we got before the power failure.
83 od -t x1 $SCRATCH_MNT/foobar | _filter_od
85 echo "Fiemap after log replay:"
86 # Must match the same extent listing we got before the power failure.
87 $XFS_IO_PROG -c "fiemap -v" $SCRATCH_MNT/foobar | _filter_fiemap $BLOCK_SIZE