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#!/bin/bash
#
# Oracle Linux DTrace.
# Copyright (c) 2017, 2024, Oracle and/or its affiliates. All rights reserved.
# Licensed under the Universal Permissive License v 1.0 as shown at
# http://oss.oracle.com/licenses/upl.
#
# Script invoked by unit tests to generate IO
#
if (( $# < 4 )); then
echo "expected 5 or more arguments: <tempfile> <filesize> <mountcmd> <mountdir> [<mountarg1>] [<mountarg2>]" >&2
exit 2
fi
tempfile=$1
filesize=$2
mountcmd=$3
mountdir=$4
mountarg1=${5-""}
mountarg2=${6-""}
# do writes
dd if=/dev/urandom of=$tempfile count=$filesize bs=1 status=none
if [ $? -ne 0 ]; then
echo ERROR dd
exit 1
fi
# flush cache and remount the file system to force the IO
ntries=3
while [ $ntries -gt 0 ]; do
umount $mountdir >& /dev/null
if [ $? -eq 0 ]; then
break
fi
sleep 1
ntries=$(($ntries - 1))
done
if [ $ntries -eq 0 ]; then
echo ERROR umount
exit 1
fi
echo 3 > /proc/sys/vm/drop_caches
$mountcmd $mountdir $mountarg1 $mountarg2
if [ $? -ne 0 ]; then
echo ERROR $mountcmd
exit 1
fi
# do reads
sum $tempfile > /dev/null
if [ $? -ne 0 ]; then
echo ERROR sum
exit 1
fi
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