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Date:   Fri, 14 Jun 2019 11:57:54 +0800
From:   Zorro Lang <zlang@redhat.com>
To:     "Darrick J. Wong" <darrick.wong@oracle.com>
Cc:     fstests@vger.kernel.org, linux-ext4@vger.kernel.org,
        linux-xfs@vger.kernel.org, Andreas Dilger <adilger@dilger.ca>
Subject: Re: [PATCH] generic: test statfs on project quota directory
Message-ID: <20190614035754.GC30864@dhcp-12-102.nay.redhat.com>
References: <20190513014951.4357-1-zlang@redhat.com>
 <01F47CA1-E737-4F52-8FF2-A3E0DCD8EB1B@dilger.ca>
 <20190612073213.GA30864@dhcp-12-102.nay.redhat.com>
 <20190612150507.GB3773859@magnolia>
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On Wed, Jun 12, 2019 at 08:05:07AM -0700, Darrick J. Wong wrote:
> On Wed, Jun 12, 2019 at 03:32:13PM +0800, Zorro Lang wrote:
> > On Tue, May 14, 2019 at 09:28:38AM -0600, Andreas Dilger wrote:
> > > On May 12, 2019, at 7:49 PM, Zorro Lang <zlang@redhat.com> wrote:
> > > > 
> > > > There's a bug on xfs cause statfs get negative f_ffree value from
> > > > a project quota directory. It's fixed by "de7243057 fs/xfs: fix
> > > > f_ffree value for statfs when project quota is set". So add statfs
> > > > testing on project quota block and inode count limit.
> > > > 
> > > > For testing foreign fs quota, change _qmount() function, turn on
> > > > project if quotaon support.
> > > > 
> > > > Signed-off-by: Zorro Lang <zlang@redhat.com>
> > > > ---
> > > > 
> > > > Hi,
> > > > 
> > > > (Long time passed, re-send this patch again to get reviewing)
> > > > 
> > > > There's one thing I don't understand, so CC ext4 mail list. Please
> > > > feel free to reply, if anyone knows that:
> > > > 
> > > > $ mkfs.ext4 $SCRATCH_DEV
> > > > $ tune2fs -O quota,project $SCRATCH_DEV
> > > > $ mount $SCRATCH_DEV $SCRATCH_MNT -o prjquota
> > > > $ quotaon -P $SCRATCH_MNT
> > > > $ mkdir $SCRATCH_MNT/t
> > > > $ xfs_quota -f -x -c "project -p $SCRATCH_MNT/t -s 42" $SCRATCH_MNT
> > > > $ xfs_quota -f -x -c "limit -p bsoft=100m answer" $SCRATCH_MNT
> > > > $ df -k $SCRATCH_MNT/t
> > > > Filesystem    1K-blocks  Used Available Use% Mounted on
> > > > SCRATCH_DEV    102400     4    102396   1% SCRATCH_MNT
> > > > 
> > > > On XFS, the 'Used' field always shows '0'. But why ext4 always has
> > > > more 4k? Is it a bug or expected.
> > > 
> > > Each directory in ext4 consumes a 4KB block, so setting the project
> > > quota on a directory always consumes at least one block.
> > 
> > Ping fstests@vger.kernel.org.
> > 
> > One month passed. Is there anything else block this patch merge?
> 
> If this is a regression test for an xfs bug, why isn't this in
> tests/xfs/ ?  Especially because ext4 has different behaviors that clash
> with the golden output -- what happens if you run this with inline data
> enabled?

Hi Darrick,

Yes, it's a regression test for xfs bug:
de7243057e7c fs/xfs: fix f_ffree value for statfs when project quota is set

It's not a xfs only case, due to I thought the test steps are common. If I
change it to a generic case, it can cover more. Do you think I should change
it back to XFS only case?

Thanks,
Zorro

> 
> --D
> 
> > Thanks,
> > Zorro
> > 
> > > 
> > > Cheers, Andreas
> > > 
> > > > common/quota          |  4 +++
> > > > tests/generic/999     | 74 +++++++++++++++++++++++++++++++++++++++++++
> > > > tests/generic/999.out |  3 ++
> > > > tests/generic/group   |  1 +
> > > > 4 files changed, 82 insertions(+)
> > > > create mode 100755 tests/generic/999
> > > > create mode 100644 tests/generic/999.out
> > > > 
> > > > diff --git a/common/quota b/common/quota
> > > > index f19f81a1..315df8cb 100644
> > > > --- a/common/quota
> > > > +++ b/common/quota
> > > > @@ -200,6 +200,10 @@ _qmount()
> > > >    if [ "$FSTYP" != "xfs" ]; then
> > > >        quotacheck -ug $SCRATCH_MNT >>$seqres.full 2>&1
> > > >        quotaon -ug $SCRATCH_MNT >>$seqres.full 2>&1
> > > > +	# try to turn on project quota if it's supported
> > > > +	if quotaon --help 2>&1 | grep -q '\-\-project'; then
> > > > +		quotaon --project $SCRATCH_MNT >>$seqres.full 2>&1
> > > > +	fi
> > > >    fi
> > > >    chmod ugo+rwx $SCRATCH_MNT
> > > > }
> > > > diff --git a/tests/generic/999 b/tests/generic/999
> > > > new file mode 100755
> > > > index 00000000..555341f1
> > > > --- /dev/null
> > > > +++ b/tests/generic/999
> > > > @@ -0,0 +1,74 @@
> > > > +#! /bin/bash
> > > > +# SPDX-License-Identifier: GPL-2.0
> > > > +# Copyright (c) 2019 Red Hat, Inc.  All Rights Reserved.
> > > > +#
> > > > +# FS QA Test No. 999
> > > > +#
> > > > +# Test statfs when project quota is set.
> > > > +# Uncover de7243057 fs/xfs: fix f_ffree value for statfs when project quota is set
> > > > +#
> > > > +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 /
> > > > +	_scratch_unmount
> > > > +	rm -f $tmp.*
> > > > +}
> > > > +
> > > > +# get standard environment, filters and checks
> > > > +. ./common/rc
> > > > +. ./common/filter
> > > > +. ./common/quota
> > > > +
> > > > +# remove previous $seqres.full before test
> > > > +rm -f $seqres.full
> > > > +
> > > > +# real QA test starts here
> > > > +_supported_fs generic
> > > > +_supported_os Linux
> > > > +_require_scratch
> > > > +_require_quota
> > > > +_require_xfs_quota_foreign
> > > > +
> > > > +_scratch_mkfs >/dev/null 2>&1
> > > > +_scratch_enable_pquota
> > > > +_qmount_option "prjquota"
> > > > +_qmount
> > > > +_require_prjquota $SCRATCH_DEV
> > > > +
> > > > +# Create a directory to be project object, and create a file to take 64k space
> > > > +mkdir $SCRATCH_MNT/t
> > > > +$XFS_IO_PROG -f -c "pwrite 0 65536" -c sync $SCRATCH_MNT/t/file >>$seqres.full
> > > > +
> > > > +# Setup temporary replacements for /etc/projects and /etc/projid
> > > > +cat >$tmp.projects <<EOF
> > > > +42:$SCRATCH_MNT/t
> > > > +EOF
> > > > +
> > > > +cat >$tmp.projid <<EOF
> > > > +answer:42
> > > > +EOF
> > > > +
> > > > +quota_cmd="$XFS_QUOTA_PROG -D $tmp.projects -P $tmp.projid"
> > > > +$quota_cmd -x -c 'project -s answer' $SCRATCH_MNT >/dev/null 2>&1
> > > > +$quota_cmd -x -c 'limit -p isoft=53 bsoft=100m answer' $SCRATCH_MNT
> > > > +
> > > > +# The itotal and size should be 53 and 102400(k), as above project quota limit.
> > > > +# The isued and used should be 2 and 64(k), as this case takes. But ext4 always
> > > > +# shows more 4k 'used' space than XFS, it prints 68k at here. So filter the
> > > > +# 6[48] at the end.
> > > > +df -k --output=file,itotal,iused,size,used $SCRATCH_MNT/t | \
> > > > +	_filter_scratch | _filter_spaces | \
> > > > +	sed -e "/SCRATCH_MNT/s/6[48]/N/"
> > > > +
> > > > +# success, all done
> > > > +status=0
> > > > +exit
> > > > diff --git a/tests/generic/999.out b/tests/generic/999.out
> > > > new file mode 100644
> > > > index 00000000..1bebabd4
> > > > --- /dev/null
> > > > +++ b/tests/generic/999.out
> > > > @@ -0,0 +1,3 @@
> > > > +QA output created by 999
> > > > +File Inodes IUsed 1K-blocks Used
> > > > +SCRATCH_MNT/t 53 2 102400 N
> > > > diff --git a/tests/generic/group b/tests/generic/group
> > > > index 9f4845c6..35da10a5 100644
> > > > --- a/tests/generic/group
> > > > +++ b/tests/generic/group
> > > > @@ -542,3 +542,4 @@
> > > > 537 auto quick trim
> > > > 538 auto quick aio
> > > > 539 auto quick punch seek
> > > > +999 auto quick quota
> > > > --
> > > > 2.17.2
> > > > 
> > > 
> > > 
> > > Cheers, Andreas
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > Cheers, Andreas
> > > 
> > > 
> > > 
> > > 
> > > 
> > 
> >