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From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 21/30] db: verify and calculate dquot CRCs
Date: Tue, 5 Nov 2013 11:25:06 +1100	[thread overview]
Message-ID: <20131105002506.GU6188@dastard> (raw)
In-Reply-To: <20131104090627.GB23564@infradead.org>

On Mon, Nov 04, 2013 at 01:06:27AM -0800, Christoph Hellwig wrote:
> On Wed, Oct 30, 2013 at 03:31:12PM +1100, Dave Chinner wrote:
> > When we set the current Io cursor to point at a dquot block, verify
> > that the dquot CRC is intact. And prior to writing such an IO
> > cursor, calculate the dquot CRC.
> > 
> > Signed-off-by: Dave Chinner <dchinner@redhat.com>
> > ---
> >  db/io.c | 5 ++++-
> >  db/io.h | 1 +
> >  2 files changed, 5 insertions(+), 1 deletion(-)
> > 
> > diff --git a/db/io.c b/db/io.c
> > index 8ddb5e5..7281148 100644
> > --- a/db/io.c
> > +++ b/db/io.c
> > @@ -464,7 +464,9 @@ write_cur(void)
> >  
> >  	if (iocur_top->ino_buf)
> >  		libxfs_dinode_calc_crc(mp, iocur_top->data);
> > -
> > +	if (iocur_top->dquot_buf)
> > +		xfs_update_cksum(iocur_top->data, sizeof(struct xfs_dqblk),
> > +				 XFS_DQUOT_CRC_OFF);
> 
> The patch looks good to get going, but it seems we'd be better off going
> through an ops vector here in some form..

Potentially - if we need a third object-within-a-buffer verification
then it will be worthwhile to do this. However, for the moment we
only have to support inodes and dquots and so for the moment I don't
see that further abstraction is necessary.

Hence right now I'd prefer to make it explicit that we are doing
these CRC calculations here and just keep in mind that if we are
going to add more we need to abstract it into an ops vector at that
time...

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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  reply	other threads:[~2013-11-05  0:25 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-30  4:30 [PATCH 00/30 V3] xfsprogs: CRC write support for xfs_db Dave Chinner
2013-10-30  4:30 ` [PATCH 01/30] xfsprogs: fix automatic dependency generation Dave Chinner
2013-10-31 14:44   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 02/30] xfs: fix some minor sparse warnings Dave Chinner
2013-10-31 14:44   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 03/30] xfs: create a shared header file for format-related information Dave Chinner
2013-10-31 14:45   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 04/30] xfs: split dquot buffer operations out Dave Chinner
2013-10-31 14:45   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 05/30] xfs: decouple inode and bmap btree header files Dave Chinner
2013-10-31 14:45   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 06/30] libxfs: unify xfs_btree.c with kernel code Dave Chinner
2013-10-31 14:46   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 07/30] libxfs: bmap btree owner swap support Dave Chinner
2013-10-31 14:47   ` Christoph Hellwig
2013-10-30  4:30 ` [PATCH 08/30] libxfs: xfs_rtalloc.c becomes xfs_rtbitmap.c Dave Chinner
2013-10-31 14:48   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 09/30] libxfs: bring across inode buffer readahead verifier changes Dave Chinner
2013-10-31 14:48   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 10/30] libxfs: Minor cleanup and bug fix sync Dave Chinner
2013-10-31 14:48   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 11/30] xfs: remove newlines from strings passed to __xfs_printk Dave Chinner
2013-10-31 14:49   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 12/30] xfs: fix the wrong new_size/rnew_size at xfs_iext_realloc_direct() Dave Chinner
2013-10-31 14:49   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 13/30] xfs: fix node forward in xfs_node_toosmall Dave Chinner
2013-10-31 14:49   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 14/30] xfs: don't emit corruption noise on fs probes Dave Chinner
2013-10-31 14:49   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 15/30] db: separate out straight buffer IO from map based IO Dave Chinner
2013-10-31 14:56   ` Christoph Hellwig
2013-10-31 21:50     ` Dave Chinner
2013-11-01 12:51       ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 16/30] db: rewrite bbmap to use xfs_buf_map Dave Chinner
2013-10-31 15:06   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 17/30] db: rewrite IO engine to use libxfs Dave Chinner
2013-10-31 15:10   ` Christoph Hellwig
2013-10-31 21:59     ` Dave Chinner
2013-10-30  4:31 ` [PATCH 18/30] db: introduce verifier support into set_cur Dave Chinner
2013-11-01 13:07   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 19/30] db: indicate if the CRC on a buffer is correct or not Dave Chinner
2013-11-01 13:09   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 20/30] db: verify and calculate inode CRCs Dave Chinner
2013-11-04  9:05   ` Christoph Hellwig
2013-11-05  0:18     ` Dave Chinner
2013-10-30  4:31 ` [PATCH 21/30] db: verify and calculate dquot CRCs Dave Chinner
2013-11-04  9:06   ` Christoph Hellwig
2013-11-05  0:25     ` Dave Chinner [this message]
2013-10-30  4:31 ` [PATCH 22/30] db: add a special directory buffer verifier Dave Chinner
2013-11-04  9:07   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 23/30] db: add a special attribute " Dave Chinner
2013-11-04  9:07   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 24/30] db: re-enable write support for v5 filesystems Dave Chinner
2013-11-04  9:07   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 25/30] libxfs: fix root inode handling inconsistencies Dave Chinner
2013-10-30 10:23   ` Christoph Hellwig
2013-10-30 21:59     ` Dave Chinner
2013-10-31  4:13       ` [PATCH 25/30 V2] " Dave Chinner
2013-10-31 15:00         ` Christoph Hellwig
2013-10-31 22:04           ` Dave Chinner
2013-11-01 13:03             ` Christoph Hellwig
2013-11-04 23:22               ` Dave Chinner
2013-11-05  9:05                 ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 26/30] xfs_db: avoid libxfs buffer lookup warnings Dave Chinner
2013-11-04  9:12   ` Christoph Hellwig
2013-11-05  0:52     ` Dave Chinner
2013-11-05  9:06       ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 27/30] libxfs: work around do_div() not handling 32 bit numerators Dave Chinner
2013-11-04  9:16   ` Christoph Hellwig
2013-11-05  1:55     ` Dave Chinner
2013-10-30  4:31 ` [PATCH 28/30] db: enable metadump on CRC filesystems Dave Chinner
2013-11-04  9:18   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 29/30] xfs: support larger inode clusters on v5 filesystems Dave Chinner
2013-11-04  9:18   ` Christoph Hellwig
2013-10-30  4:31 ` [PATCH 30/30] xfsprogs: kill experimental warnings for " Dave Chinner
2013-11-04  9:19   ` Christoph Hellwig

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