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From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 07/18] xfs: stop using q_core limits in the quota code
Date: Wed, 1 Jul 2020 16:13:43 -0700
Message-ID: <20200701231343.GN7625@magnolia> (raw)
In-Reply-To: <20200701230136.GB2005@dread.disaster.area>

On Thu, Jul 02, 2020 at 09:01:36AM +1000, Dave Chinner wrote:
> On Tue, Jun 30, 2020 at 08:42:36AM -0700, Darrick J. Wong wrote:
> > From: Darrick J. Wong <darrick.wong@oracle.com>
> > 
> > Add limits fields in the incore dquot, and use that instead of the ones
> > in qcore.  This eliminates a bunch of endian conversions and will
> > eventually allow us to remove qcore entirely.
> > 
> > Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> ....
> > @@ -124,82 +123,67 @@ xfs_qm_adjust_dqtimers(
> >  	defq = xfs_get_defquota(qi, xfs_dquot_type(dq));
> >  
> >  #ifdef DEBUG
> > -	if (d->d_blk_hardlimit)
> > -		ASSERT(be64_to_cpu(d->d_blk_softlimit) <=
> > -		       be64_to_cpu(d->d_blk_hardlimit));
> > -	if (d->d_ino_hardlimit)
> > -		ASSERT(be64_to_cpu(d->d_ino_softlimit) <=
> > -		       be64_to_cpu(d->d_ino_hardlimit));
> > -	if (d->d_rtb_hardlimit)
> > -		ASSERT(be64_to_cpu(d->d_rtb_softlimit) <=
> > -		       be64_to_cpu(d->d_rtb_hardlimit));
> > +	if (dq->q_blk.hardlimit)
> > +		ASSERT(dq->q_blk.softlimit <= dq->q_blk.hardlimit);
> > +	if (dq->q_ino.hardlimit)
> > +		ASSERT(dq->q_ino.softlimit <= dq->q_ino.hardlimit);
> > +	if (dq->q_rtb.hardlimit)
> > +		ASSERT(dq->q_rtb.softlimit <= dq->q_rtb.hardlimit);
> >  #endif
> 
> You can get rid of the ifdef DEBUG here - if ASSERT is not defined
> then the compiler will elide all this code anyway.

OK.

> >  /* Allocate and initialize the dquot buffer for this in-core dquot. */
> > @@ -1123,9 +1119,29 @@ static xfs_failaddr_t
> >  xfs_qm_dqflush_check(
> >  	struct xfs_dquot	*dqp)
> >  {
> > +	struct xfs_disk_dquot	*ddq = &dqp->q_core;
> > +
> >  	if (hweight8(dqp->dq_flags & XFS_DQ_ALLTYPES) != 1)
> >  		return __this_address;
> >  
> > +	if (dqp->q_id == 0)
> > +		return NULL;
> > +
> > +	if (dqp->q_blk.softlimit &&
> > +	    be64_to_cpu(ddq->d_bcount) > dqp->q_blk.softlimit &&
> > +	    !ddq->d_btimer)
> > +		return __this_address;
> > +
> > +	if (dqp->q_ino.softlimit &&
> > +	    be64_to_cpu(ddq->d_icount) > dqp->q_ino.softlimit &&
> > +	    !ddq->d_itimer)
> > +		return __this_address;
> > +
> > +	if (dqp->q_rtb.softlimit &&
> > +	    be64_to_cpu(ddq->d_rtbcount) > dqp->q_rtb.softlimit &&
> > +	    !ddq->d_rtbtimer)
> > +		return __this_address;
> 
> These are new in this patch. These are checked by
> xfs_dquot_verify(), so what's the reason for duplicating the checks
> here?

The new functions perform spot-checks of the incore dquot before we start
flushing them out to disk, because the goal of this patch is to further
decouple the incore and ondisk dquots ahead of the y2038 support series.

--D

> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> david@fromorbit.com

  reply index

Thread overview: 94+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30 15:41 [PATCH 00/18] xfs: remove xfs_disk_quot from incore dquot Darrick J. Wong
2020-06-30 15:41 ` [PATCH 01/18] xfs: clear XFS_DQ_FREEING if we can't lock the dquot buffer to flush Darrick J. Wong
2020-06-30 21:35   ` Allison Collins
2020-07-01  8:32   ` Chandan Babu R
2020-07-01  8:33   ` Christoph Hellwig
2020-07-01 22:42     ` Dave Chinner
2020-06-30 15:42 ` [PATCH 02/18] xfs: fix inode quota reservation checks Darrick J. Wong
2020-06-30 21:35   ` Allison Collins
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:34   ` Christoph Hellwig
2020-06-30 15:42 ` [PATCH 03/18] xfs: validate ondisk/incore dquot flags Darrick J. Wong
2020-06-30 21:35   ` Allison Collins
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:42   ` Christoph Hellwig
2020-07-01 18:25     ` Darrick J. Wong
2020-07-02  6:30       ` Christoph Hellwig
2020-07-02 15:13         ` Darrick J. Wong
2020-07-01 22:41   ` Dave Chinner
2020-07-01 23:16     ` Darrick J. Wong
2020-06-30 15:42 ` [PATCH 04/18] xfs: stop using q_core.d_flags in the quota code Darrick J. Wong
2020-07-01  8:34   ` Chandan Babu R
2020-07-01  8:47   ` Christoph Hellwig
2020-07-01 19:02     ` Darrick J. Wong
2020-07-01 20:15   ` Allison Collins
2020-07-01 22:50   ` Dave Chinner
2020-07-01 23:19     ` Darrick J. Wong
2020-07-01 23:44       ` Dave Chinner
2020-07-01 23:50         ` Darrick J. Wong
2020-07-03  0:58           ` Dave Chinner
2020-07-03 18:01             ` Darrick J. Wong
2020-06-30 15:42 ` [PATCH 05/18] xfs: stop using q_core.d_id " Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:48   ` Christoph Hellwig
2020-07-01 20:16   ` Allison Collins
2020-06-30 15:42 ` [PATCH 06/18] xfs: use a per-resource struct for incore dquot data Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:49   ` Christoph Hellwig
2020-07-01 20:16   ` Allison Collins
2020-06-30 15:42 ` [PATCH 07/18] xfs: stop using q_core limits in the quota code Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:50   ` Christoph Hellwig
2020-07-01 20:16   ` Allison Collins
2020-07-01 23:01   ` Dave Chinner
2020-07-01 23:13     ` Darrick J. Wong [this message]
2020-07-01 23:33       ` Darrick J. Wong
2020-07-01 23:45         ` Dave Chinner
2020-06-30 15:42 ` [PATCH 08/18] xfs: stop using q_core counters " Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:51   ` Christoph Hellwig
2020-07-01 23:20   ` Allison Collins
2020-06-30 15:42 ` [PATCH 09/18] xfs: stop using q_core warning " Darrick J. Wong
2020-07-01  8:33   ` Chandan Babu R
2020-07-01  8:51   ` Christoph Hellwig
2020-07-01 23:20   ` Allison Collins
2020-06-30 15:42 ` [PATCH 10/18] xfs: stop using q_core timers " Darrick J. Wong
2020-07-01  8:34   ` Chandan Babu R
2020-07-01  8:51   ` Christoph Hellwig
2020-07-01 23:20   ` Allison Collins
2020-06-30 15:43 ` [PATCH 11/18] xfs: remove qcore from incore dquots Darrick J. Wong
2020-07-01  8:34   ` Chandan Babu R
2020-07-01  8:52   ` Christoph Hellwig
2020-07-01 23:07   ` Dave Chinner
2020-07-01 23:14     ` Darrick J. Wong
2020-07-02  2:06   ` Allison Collins
2020-06-30 15:43 ` [PATCH 12/18] xfs: refactor default quota limits by resource Darrick J. Wong
2020-07-01  8:52   ` Chandan Babu R
2020-07-01  8:53   ` Christoph Hellwig
2020-07-01 23:30   ` Dave Chinner
2020-07-02  0:07     ` Darrick J. Wong
2020-07-02  2:06   ` Allison Collins
2020-06-30 15:43 ` [PATCH 13/18] xfs: remove unnecessary arguments from quota adjust functions Darrick J. Wong
2020-07-01  8:53   ` Christoph Hellwig
2020-07-01  8:58   ` Chandan Babu R
2020-07-02  2:06   ` Allison Collins
2020-06-30 15:43 ` [PATCH 14/18] xfs: refactor quota exceeded test Darrick J. Wong
2020-07-01  8:56   ` Christoph Hellwig
2020-07-01 17:51     ` Darrick J. Wong
2020-07-01 18:48       ` Eric Sandeen
2020-07-01 23:34       ` Dave Chinner
2020-07-01 10:19   ` Chandan Babu R
2020-07-02 18:57   ` Allison Collins
2020-06-30 15:43 ` [PATCH 15/18] xfs: refactor xfs_qm_scall_setqlim Darrick J. Wong
2020-07-01  8:56   ` Christoph Hellwig
2020-07-03  4:11   ` Allison Collins
2020-07-03 12:39   ` Chandan Babu R
2020-06-30 15:43 ` [PATCH 16/18] xfs: refactor xfs_trans_dqresv Darrick J. Wong
2020-07-03  4:11   ` Allison Collins
2020-07-03 13:00   ` Chandan Babu R
2020-06-30 15:43 ` [PATCH 17/18] xfs: refactor xfs_trans_apply_dquot_deltas Darrick J. Wong
2020-07-04 20:41   ` Allison Collins
2020-07-06 13:40   ` Chandan Babu R
2020-06-30 15:43 ` [PATCH 18/18] xfs: add more dquot tracepoints Darrick J. Wong
2020-07-04 20:41   ` Allison Collins
2020-07-06 13:42   ` Chandan Babu R

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