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Uses the statx helper to test the results of the STATX_DIOALIGN request as we manipulate DIO enable, dataset recordsize and file size and structure. Sponsored-by: https://despairlabs.com/sponsor/ Signed-off-by: Rob Norris <[email protected]>
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tests/zfs-tests/tests/functional/stat/statx_dioalign.ksh
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| #!/bin/ksh -p | ||
| # | ||
| # 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 | ||
| # | ||
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| # | ||
| # Copyright (c) 2025, Rob Norris <[email protected]> | ||
| # | ||
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| # | ||
| # Uses the statx helper to test the results of the STATX_DIOALIGN request as we | ||
| # manipulate DIO enable, dataset recordsize and file size and structure. | ||
| # | ||
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| . $STF_SUITE/include/libtest.shlib | ||
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| verify_runnable "both" | ||
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| if ! is_linux ; then | ||
| log_unsupported "statx(2) only available on Linux" | ||
| fi | ||
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| if [[ $(linux_version) -lt $(linux_version "6.1") ]] ; then | ||
| log_unsupported "STATX_DIOALIGN not available before Linux 6.1" | ||
| fi | ||
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| CLAIM="STATX_DIOALIGN returns useful values when Direct IO is available." | ||
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| TESTDS=${TESTPOOL}/${TESTFS} | ||
| TESTFILE=${TESTDIR}/${TESTFILE0} | ||
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| log_must save_tunable DIO_ENABLED | ||
| typeset recordsize_saved=$(get_prop recordsize $TESTDS) | ||
| typeset direct_saved=$(get_prop direct $TESTDS) | ||
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| function cleanup | ||
| { | ||
| rm -f ${TESTFILE} | ||
| zfs set recordsize=$recordsize_saved $TESTDS | ||
| zfs set direct=$direct_saved $TESTDS | ||
| restore_tunable DIO_ENABLED | ||
| } | ||
| log_onexit cleanup | ||
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| # assert_dioalign <file> <memalign> <ioalign> | ||
| function assert_dioalign | ||
| { | ||
| typeset file=$1 | ||
| typeset -i memalign=$2 | ||
| typeset -i ioalign=$3 | ||
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| typeset -a v=($(statx dioalign $file | cut -f2- -d' ')) | ||
| log_note "statx dioalign returned: $file: mem=${v[0]} io=${v[1]}" | ||
| log_must [ ${v[0]} -eq $memalign -a ${v[1]} -eq $ioalign ] | ||
| } | ||
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| log_assert $CLAIM | ||
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| # Compute the expected IO size. Testing this properly means changing the | ||
| # ashift, which means recreating the pool, which is slightly fiddly here, so | ||
| # I have not bothered. | ||
| typeset -i PAGE_SIZE=$(getconf PAGE_SIZE) | ||
| typeset -i IO_SIZE=$(( 1 << $(zpool get -H -o value ashift $TESTPOOL) )) | ||
| if [[ $IO_SIZE -lt $PAGE_SIZE ]] ; then | ||
| IO_SIZE=$PAGE_SIZE | ||
| fi | ||
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| # Set recordsize and make a recordsized file for the general tests. | ||
| log_must zfs set recordsize=128K $TESTDS | ||
| log_must dd if=/dev/urandom of=$TESTFILE bs=128k count=1 | ||
| log_must zpool sync | ||
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| # when DIO is disabled via tunable, result should always be zero, no matter | ||
| # what the value of the direct= property. | ||
| log_must set_tunable32 DIO_ENABLED 0 | ||
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| for d in disabled standard always ; do | ||
| log_must zfs set direct=$d $TESTDS | ||
| assert_dioalign $TESTFILE 0 0 | ||
| done | ||
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| # when DIO is enabled via tunable, behaviour is dependent on the direct= | ||
| # property. | ||
| log_must set_tunable32 DIO_ENABLED 1 | ||
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| # when DIO is disabled via property, result should be zero. | ||
| log_must zfs set direct=disabled $TESTDS | ||
| assert_dioalign $TESTFILE 0 0 | ||
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| # when DIO is enabled, the result should be mem=recordsize, io=pagesize | ||
| for d in standard always ; do | ||
| log_must zfs set direct=$d $TESTDS | ||
| assert_dioalign $TESTFILE 131072 $IO_SIZE | ||
| done | ||
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| # setting the recordsize smaller than the blocksize on an existing file | ||
| # will use the file's blocksize | ||
| log_must zfs set recordsize=32K $TESTDS | ||
| for d in standard always ; do | ||
| log_must zfs set direct=$d $TESTDS | ||
| assert_dioalign $TESTFILE 131072 $IO_SIZE | ||
| done | ||
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| # setting the recordsize larger than the blocksize on an existing file with | ||
| # only one block will use the dataset's recordsize, ie the size that the block | ||
| # could grow to | ||
| log_must zfs set recordsize=256K $TESTDS | ||
| for d in standard always ; do | ||
| log_must zfs set direct=$d $TESTDS | ||
| assert_dioalign $TESTFILE 262144 $IO_SIZE | ||
| done | ||
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| # extending a file into the second block fixes its blocksize, so result should | ||
| # be its blocksize, regardless of how the recordsize changes | ||
| log_must zfs set recordsize=128K $TESTDS | ||
| log_must dd if=/dev/urandom of=$TESTFILE bs=128k count=1 seek=1 | ||
| log_must zpool sync | ||
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| for rs in 64K 128K 256K 512K ; do | ||
| log_must zfs set recordsize=$rs $TESTDS | ||
| for d in standard always ; do | ||
| log_must zfs set direct=$d $TESTDS | ||
| assert_dioalign $TESTFILE 131072 $IO_SIZE | ||
| done | ||
| done | ||
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| log_pass $CLAIM |