Re: [PATCH] generic: Verify if statx() can qurey S_SAX flag on regular file correctly

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

On 2020/7/2 23:18, Darrick J. Wong wrote:
> On Thu, Jul 02, 2020 at 02:35:44PM +0800, Xiao Yang wrote:
>> With new kernel(e.g. v5.8-rc1), statx() can be used to qurey S_SAX flag
> No, we don't have a VFS flag for saxomophone. ;)
>
> Maybe you meant S_DAX?
Hi Darrick,

Yes, this is an obvious typo(S_SAX->S_DAX). :-(

Thanks,
Xiao Yang
> --D
>
>> on regular file, so add a test to verify the feature.
>>
>> Reference:
>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=712b2698e4c024b561694cbcc1abba13eb0fd9ce
>>
>> Signed-off-by: Xiao Yang<yangx.jy@cn.fujitsu.com>
>> ---
>>
>> Note: this patch depends on the following patch set:
>> https://www.spinics.net/lists/fstests/msg14252.html
>>
>>   tests/generic/604     | 100 ++++++++++++++++++++++++++++++++++++++++++
>>   tests/generic/604.out |   2 +
>>   tests/generic/group   |   1 +
>>   3 files changed, 103 insertions(+)
>>   create mode 100644 tests/generic/604
>>   create mode 100644 tests/generic/604.out
>>
>> diff --git a/tests/generic/604 b/tests/generic/604
>> new file mode 100644
>> index 00000000..b0baa781
>> --- /dev/null
>> +++ b/tests/generic/604
>> @@ -0,0 +1,100 @@
>> +#! /bin/bash
>> +# SPDX-License-Identifier: GPL-2.0
>> +# Copyright (c) 2020 Fujitsu.  All Rights Reserved.
>> +#
>> +# FS QA Test 604
>> +#
>> +# By the following cases, verify if statx() can query S_SAX flag
>> +# on regular file correctly.
>> +# 1) With dax=always option, FS_XFLAG_DAX is ignored and S_SAX flag
>> +#    always exists on regular file.
>> +# 2) With dax=inode option, setting/clearing FS_XFLAG_DAX can change
>> +#    S_SAX flag on regular file.
>> +# 3) With dax=never option, FS_XFLAG_DAX is ignored and S_SAX flag
>> +#    never exists on regular file.
>> +#
>> +seq=`basename $0`
>> +seqres=$RESULT_DIR/$seq
>> +echo "QA output created by $seq"
>> +
>> +here=`pwd`
>> +tmp=/tmp/$$
>> +status=1        # failure is the default!
>> +trap "_cleanup; exit \$status" 0 1 2 3 15
>> +
>> +_cleanup()
>> +{
>> +	cd /
>> +	rm -f $tmp.*
>> +}
>> +
>> +# get standard environment, filters and checks
>> +. ./common/rc
>> +. ./common/filter
>> +
>> +# remove previous $seqres.full before test
>> +rm -f $seqres.full
>> +
>> +_supported_fs generic
>> +_supported_os Linux
>> +_require_scratch_dax_mountopt "dax=always"
>> +_require_scratch_dax_iflag
>> +_require_xfs_io_command "statx" "-r"
>> +
>> +PARENT_DIR=$SCRATCH_MNT/testdir
>> +TEST_FILE=$PARENT_DIR/testfile
>> +
>> +check_s_dax()
>> +{
>> +	local exp_s_dax=$1
>> +
>> +	local attributes=$($XFS_IO_PROG -c 'statx -r' $TEST_FILE | awk '/stat.attributes / { print $3 }')
>> +	if [ $exp_s_dax -eq 0 ]; then
>> +		(( attributes&  0x2000 ))&&  echo "$TEST_FILE has unexpected S_DAX flag"
>> +	else
>> +		(( attributes&  0x2000 )) || echo "$TEST_FILE doen't have expected S_DAX flag"
>> +	fi
>> +}
>> +
>> +test_s_dax()
>> +{
>> +	local dax_option=$1
>> +	local exp_s_dax1=$2
>> +	local exp_s_dax2=$3
>> +
>> +	# Mount with specified dax option
>> +	_scratch_mount "-o $dax_option"
>> +
>> +	# Prepare directory
>> +	mkdir -p $PARENT_DIR
>> +
>> +	rm -f $TEST_FILE
>> +	$XFS_IO_PROG -c "chattr +x" $PARENT_DIR
>> +	touch $TEST_FILE
>> +	# Check if setting FS_XFLAG_DAX changes S_DAX flag
>> +	check_s_dax $exp_s_dax1
>> +
>> +	rm -f $TEST_FILE
>> +	$XFS_IO_PROG -c "chattr -x" $PARENT_DIR
>> +	touch $TEST_FILE
>> +	# Check if clearing FS_XFLAG_DAX changes S_DAX flag
>> +	check_s_dax $exp_s_dax2
>> +
>> +	_scratch_unmount
>> +}
>> +
>> +do_tests()
>> +{
>> +	test_s_dax "dax=always" 1 1
>> +	test_s_dax "dax=inode" 1 0
>> +	test_s_dax "dax=never" 0 0
>> +}
>> +
>> +_scratch_mkfs>>  $seqres.full 2>&1
>> +
>> +do_tests
>> +
>> +# success, all done
>> +echo "Silence is golden"
>> +status=0
>> +exit
>> diff --git a/tests/generic/604.out b/tests/generic/604.out
>> new file mode 100644
>> index 00000000..c06a1c7f
>> --- /dev/null
>> +++ b/tests/generic/604.out
>> @@ -0,0 +1,2 @@
>> +QA output created by 604
>> +Silence is golden
>> diff --git a/tests/generic/group b/tests/generic/group
>> index 1d0d5606..676e0d2e 100644
>> --- a/tests/generic/group
>> +++ b/tests/generic/group
>> @@ -606,3 +606,4 @@
>>   601 auto quick quota
>>   602 auto quick encrypt
>>   603 auto attr quick dax
>> +604 auto attr quick dax
>> -- 
>> 2.21.0
>>
>>
>>
>
> .
>