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 seqres=$RESULT_DIR/$seq
13 echo "QA output created by $seq"
15 status=1 # failure is the default!
16 trap "_cleanup; exit \$status" 0 1 2 3 15
25 # get standard environment, filters and checks
30 # real QA test starts here
33 _require_dm_target flakey
34 _require_xfs_io_command "fpunch"
43 # We create the filesystem with a node size of 64Kb because we need to
44 # create a specific metadata layout in order to trigger the bug we are
45 # testing. At the moment the node size can not be smaller then the
46 # system's page size, so given that the largest possible page size is
47 # 64Kb and by default the node size is set to the system's page size
48 # value, we explicitly create a filesystem with a 64Kb node size.
49 _scratch_mkfs -O no-holes -n $((64 * 1024)) >>$seqres.full 2>&1
50 _require_metadata_journaling $SCRATCH_DEV
54 # Create our test file with 832 extents of 256Kb each. Before each
55 # extent, there is a 256Kb hole (except for the first extent, which
56 # starts at offset 0). This creates two leafs in the filesystem tree.
57 # We use direct IO to ensure we get exactly 256K extents (with buffered
58 # IO we can get writeback triggered at any time and therefore get
59 # extents smaller than 256K).
60 for ((i = 0; i <= 831; i++)); do
61 local offset=$((i * 2 * 256 * 1024))
62 $XFS_IO_PROG -f -d -c "pwrite -S 0xab -b 256K $offset 256K" \
63 $SCRATCH_MNT/foobar >/dev/null
66 # Make sure everything done so far is durably persisted.
69 # Now punch a hole that covers part of the extent at offset
71 # We want to punch a hole that starts in the middle of the last extent
72 # item in the first leaf. On a system without selinux enabled that is
73 # the extent that starts at offset 216530944, while on a system with it
74 # enabled it is the extent that starts at offset 216006656 (because
75 # selinux causes a xattr item to be added to our test file).
76 $XFS_IO_PROG -c "fpunch $((punch_offset + 128 * 1024 - 4000)) 256K" \
80 echo "File digest before power failure:"
81 md5sum $SCRATCH_MNT/foobar | _filter_scratch
82 # Simulate a power failure and mount the filesystem to check that
83 # replaying the fsync log/journal succeeds and our test file has the
85 _flakey_drop_and_remount
86 echo "File digest after power failure and log replay:"
87 md5sum $SCRATCH_MNT/foobar | _filter_scratch