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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2021 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test 251
#
# Test if btrfs will crash when using compress-force mount option against
# incompressible data
#
. ./common/preamble
_begin_fstest auto quick compress dangerous
# Import common functions.
. ./common/filter
# real QA test starts here
# Modify as appropriate.
_supported_fs btrfs
_require_scratch
pagesize=$(get_page_size)
# Read the content from urandom to a known safe location
$XFS_IO_PROG -f -c "pwrite -i /dev/urandom 0 $pagesize" "$tmp.good" > /dev/null
# Make sure we didn't get short write
if [ $(_get_filesize "$tmp.good") != "$pagesize" ]; then
_fail "Got a short read from /dev/urandom"
fi
workload()
{
local compression=$1
echo "=== Testing compress-force=$compression ==="
_scratch_mkfs -s "$pagesize">> $seqres.full
_scratch_mount -o compress-force="$compression"
cp "$tmp.good" "$SCRATCH_MNT/$compression"
# When unpatched, compress-force=lzo would crash at data writeback
_scratch_cycle_mount
# Make sure the content matches
if [ "$(_md5_checksum $tmp.good)" != \
"$(_md5_checksum $SCRATCH_MNT/$compression)" ]; then
echo "Content of '$SCRATCH_MNT/file' mismatch with known good copy"
else
echo "OK"
fi
_scratch_unmount
}
workload lzo
workload zstd
workload zlib
# success, all done
status=0
exit
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