2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
7 # Test that when we have the no-holes mode enabled and a specific metadata
8 # layout, if we punch a hole and fsync the file, at replay time the whole
12 _begin_fstest auto quick punch log
14 # Override the default cleanup function.
22 # Import common functions.
26 # real QA test starts here
29 _require_dm_target flakey
30 _require_xfs_io_command "fpunch"
37 # We create the filesystem with a node size of 64Kb because we need to
38 # create a specific metadata layout in order to trigger the bug we are
39 # testing. At the moment the node size can not be smaller then the
40 # system's page size, so given that the largest possible page size is
41 # 64Kb and by default the node size is set to the system's page size
42 # value, we explicitly create a filesystem with a 64Kb node size.
43 _scratch_mkfs -O no-holes -n $((64 * 1024)) >>$seqres.full 2>&1
44 _require_metadata_journaling $SCRATCH_DEV
48 # Create our test file with 832 extents of 256Kb each. Before each
49 # extent, there is a 256Kb hole (except for the first extent, which
50 # starts at offset 0). This creates two leafs in the filesystem tree.
51 # We use direct IO to ensure we get exactly 256K extents (with buffered
52 # IO we can get writeback triggered at any time and therefore get
53 # extents smaller than 256K).
54 for ((i = 0; i <= 831; i++)); do
55 local offset=$((i * 2 * 256 * 1024))
56 $XFS_IO_PROG -f -d -c "pwrite -S 0xab -b 256K $offset 256K" \
57 $SCRATCH_MNT/foobar >/dev/null
60 # Make sure everything done so far is durably persisted.
63 # Now punch a hole that covers part of the extent at offset
65 # We want to punch a hole that starts in the middle of the last extent
66 # item in the first leaf. On a system without selinux enabled that is
67 # the extent that starts at offset 216530944, while on a system with it
68 # enabled it is the extent that starts at offset 216006656 (because
69 # selinux causes a xattr item to be added to our test file).
70 $XFS_IO_PROG -c "fpunch $((punch_offset + 128 * 1024 - 4000)) 256K" \
74 echo "File digest before power failure:"
75 md5sum $SCRATCH_MNT/foobar | _filter_scratch
76 # Simulate a power failure and mount the filesystem to check that
77 # replaying the fsync log/journal succeeds and our test file has the
79 _flakey_drop_and_remount
80 echo "File digest after power failure and log replay:"
81 md5sum $SCRATCH_MNT/foobar | _filter_scratch