mirror_zfs/tests/zfs-tests/tests/functional/direct/dio_mixed.ksh
Rob Norris eb9098ed47 SPDX: license tags: CDDL-1.0
Sponsored-by: https://despairlabs.com/sponsor/
Signed-off-by: Rob Norris <robn@despairlabs.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
2025-03-13 17:56:27 -07:00

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#!/bin/ksh -p
# SPDX-License-Identifier: CDDL-1.0
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or https://opensource.org/licenses/CDDL-1.0.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright (c) 2021 by Lawrence Livermore National Security, LLC.
#
. $STF_SUITE/include/libtest.shlib
. $STF_SUITE/include/properties.shlib
. $STF_SUITE/tests/functional/direct/dio.cfg
. $STF_SUITE/tests/functional/direct/dio.kshlib
#
# DESCRIPTION:
# Verify mixed buffered and Direct I/O are coherent.
#
# STRATEGY:
# 1. Verify interleaved buffered and Direct I/O
#
verify_runnable "global"
function cleanup
{
log_must rm -f $src_file $new_file $tmp_file
}
log_assert "Verify mixed buffered and Direct I/O are coherent."
log_onexit cleanup
mntpnt=$(get_prop mountpoint $TESTPOOL/$TESTFS)
src_file=$mntpnt/src_file
new_file=$mntpnt/new_file
tmp_file=$mntpnt/tmp_file
page_size=$(getconf PAGESIZE)
file_size=1048576
log_must stride_dd -i /dev/urandom -o $src_file -b $file_size -c 1
#
# Using mixed input and output block sizes verify that buffered and
# Direct I/O can be interleaved and the result with always be coherent.
#
for ibs in "512" "$page_size" "131072"; do
for obs in "512" "$page_size" "131072"; do
iblocks=$(($file_size / $ibs))
oblocks=$(($file_size / $obs))
iflags=""
oflags=""
# Only allow Direct I/O when it is at least page sized.
if [[ $ibs -ge $page_size ]]; then
iflags="-d"
fi
if [[ $obs -ge $page_size ]]; then
oflags="-D"
fi
# Verify buffered write followed by a direct read.
log_must stride_dd -i $src_file -o $new_file -b $obs \
-c $oblocks
log_must stride_dd -i $new_file -o $tmp_file -b $ibs \
-c $iblocks $iflags
log_must cmp_xxh128 $new_file $tmp_file
log_must rm -f $new_file $tmp_file
# Verify direct write followed by a buffered read.
log_must stride_dd -i $src_file -o $new_file -b $obs \
-c $oblocks $oflags
log_must stride_dd -i $new_file -o $tmp_file -b $ibs \
-c $iblocks
log_must cmp_xxh128 $new_file $tmp_file
log_must rm -f $new_file $tmp_file
# Verify direct write followed by a direct read.
log_must stride_dd -i $src_file -o $new_file -b $obs \
-c $oblocks $oflags
log_must stride_dd -i $new_file -o $tmp_file -b $ibs \
-c $iblocks $iflags
log_must cmp_xxh128 $new_file $tmp_file
log_must rm -f $new_file $tmp_file
done
done
log_pass "Verify mixed buffered and Direct I/O are coherent."