2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2014 Red Hat, Inc. All Rights Reserved.
7 # Test stale data exposure via writeback using various file allocation
8 # modification commands. The presumption is that such commands result in partial
9 # writeback and can convert a delayed allocation extent, that might be larger
10 # than the ranged affected by fallocate, to a normal extent. If the fs happens
11 # to crash sometime between when the extent modification is logged and writeback
12 # occurs for dirty pages within the extent but outside of the fallocated range,
13 # stale data exposure can occur.
16 _begin_fstest shutdown rw punch zero
18 # Import common functions.
22 # real QA test starts here
27 img=$SCRATCH_MNT/$seq.img
28 mnt=$SCRATCH_MNT/$seq.mnt
32 # f2fs-utils 1.9.0 needs at least 38 MB space for f2fs image. However,
33 # f2fs-utils 1.14.0 needs at least 52 MB. Not sure if it will change
34 # again. So just set it 128M.
35 if [ $FSTYP == "f2fs" ]; then
39 # Create an fs on a small, initialized image. The pattern is written to
40 # the image to detect stale data exposure.
41 $XFS_IO_PROG -f -c "truncate 0" -c "pwrite -S 0xCD 0 $size" $img \
43 _mkfs_dev $img >> $seqres.full 2>&1
50 # write, run the test command and shutdown the fs
51 $XFS_IO_PROG -f -c "pwrite -S 1 0 64k" -c "$cmd 60k 4k" $file | \
53 $here/src/godown -f $mnt
58 # We should /never/ see 0xCD in the file, because we wrote that pattern
59 # to the filesystem image to expose stale data.
60 if hexdump -v -e '/1 "%02X "' $file | grep -q "CD"; then
61 echo "Saw stale data!!!"
68 # Modify as appropriate.
71 _require_scratch_shutdown
72 _require_xfs_io_command "falloc"
73 _require_xfs_io_command "fpunch"
74 _require_xfs_io_command "fzero"
76 _scratch_mkfs >/dev/null 2>&1
77 _require_local_device $SCRATCH_DEV
78 _require_metadata_journaling $SCRATCH_DEV
81 _crashtest "falloc -k"