From: Mark Tinguely <tinguely@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 32/32] xfs: add CRC checks to the log
Date: Mon, 12 Nov 2012 09:37:49 -0600 [thread overview]
Message-ID: <50A117CD.8040907@sgi.com> (raw)
In-Reply-To: <1352721264-3700-33-git-send-email-david@fromorbit.com>
On 11/12/12 05:54, Dave Chinner wrote:
> From: Christoph Hellwig<hch@lst.de>
>
> Implement CRCs for the log buffers. We re-use a field in
> struct xlog_rec_header that was used for a weak checksum of the
> log buffer payload in debug builds before.
>
> The new checksumming uses the crc32c checksum we will use elsewhere
> in XFS, and also protects the record header and addition cycle data.
>
> Due to this there are some interesting changes in xlog_sync, as we
> need to do the cycle wrapping for the split buffer case much earlier,
> as we would touch the buffer after generating the checksum otherwise.
>
> The CRC calculation is always enabled, even for non-CRC filesystems,
> as adding this CRC does not change the log format. On non-CRC
> filesystems, only issue an alert if a CRC mismatch is found and
> allow recovery to continue - this will act as an indicator that
> log recovery problems are a result of log corruption. On CRC enabled
> filesystems, however, log recovery will fail.
>
> Note that existing debug kernels will write a simple checksum value
> to the log, so the first time this is run on a filesystem taht was
> last used on a debug kernel it will through CRC mismatch warning
> errors. These can be ignored.
>
> Initially based on a patch from Dave Chinner, then modified
> significantly by Christoph Hellwig. Modified again by Dave Chinner
> to get to this version.
>
> Signed-off-by: Christoph Hellwig<hch@lst.de>
> Signed-off-by: Dave Chinner<dchinner@redhat.com>
> ---
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
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next prev parent reply other threads:[~2012-11-12 15:35 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-12 11:53 [PATCH 00/32] xfs: current queue for 3.8 Dave Chinner
2012-11-12 11:53 ` [PATCH 01/32] xfs: add more attribute tree trace points Dave Chinner
2012-11-12 22:11 ` Mark Tinguely
2012-11-15 16:18 ` Christoph Hellwig
2012-11-12 11:53 ` [PATCH 02/32] xfs: remove xfs_tosspages Dave Chinner
2012-11-14 6:42 ` [PATCH 02/32 V2] " Dave Chinner
2012-11-14 18:50 ` Andrew Dahl
2012-11-14 18:52 ` [PATCH 02.5/32] " Andrew Dahl
2012-11-14 19:59 ` Mark Tinguely
2012-11-21 8:05 ` Dave Chinner
2012-11-22 5:10 ` Andrew Dahl
2012-11-22 23:29 ` Dave Chinner
2012-11-26 18:04 ` Andrew Dahl
2012-11-14 21:17 ` [PATCH 02/32 V2] " Dave Chinner
2012-11-15 16:22 ` Christoph Hellwig
2012-11-12 11:53 ` [PATCH 03/32] xfs: remove xfs_wait_on_pages() Dave Chinner
2012-11-15 16:23 ` Christoph Hellwig
2012-11-12 11:53 ` [PATCH 04/32] xfs: remove xfs_flush_pages Dave Chinner
2012-11-15 16:24 ` Christoph Hellwig
2012-11-12 11:53 ` [PATCH 05/32] xfs: remove xfs_flushinval_pages Dave Chinner
2012-11-15 16:28 ` Christoph Hellwig
2012-11-15 20:54 ` Dave Chinner
2012-11-21 10:12 ` Christoph Hellwig
2012-11-12 11:53 ` [PATCH 06/32] xfs: use btree block initialisation functions in growfs Dave Chinner
2012-11-13 21:18 ` Rich Johnston
2012-11-23 12:40 ` Christoph Hellwig
2012-11-23 21:25 ` Dave Chinner
2012-11-12 11:53 ` [PATCH 07/32] xfs: growfs: use uncached buffers for new headers Dave Chinner
2012-11-13 21:18 ` Rich Johnston
2012-11-12 11:54 ` [PATCH 08/32] xfs: make growfs initialise the AGFL header Dave Chinner
2012-11-13 21:18 ` Rich Johnston
2012-11-23 12:41 ` Christoph Hellwig
2012-11-23 21:27 ` Dave Chinner
2012-11-12 11:54 ` [PATCH 09/32] xfs: make buffer read verication an IO completion function Dave Chinner
2012-11-12 11:54 ` [PATCH 10/32] xfs: uncached buffer reads need to return an error Dave Chinner
2012-11-12 11:54 ` [PATCH 11/32] xfs: verify superblocks as they are read from disk Dave Chinner
2012-11-23 12:42 ` Christoph Hellwig
2012-11-12 11:54 ` [PATCH 12/32] xfs: verify AGF blocks " Dave Chinner
2012-11-13 1:09 ` Phil White
2012-11-13 3:07 ` Dave Chinner
2012-11-14 6:44 ` [PATCH 12/32 V2] " Dave Chinner
2012-11-14 21:28 ` Mark Tinguely
2012-11-12 11:54 ` [PATCH 13/32] xfs: verify AGI " Dave Chinner
2012-11-12 11:54 ` [PATCH 14/32] xfs: verify AGFL " Dave Chinner
2012-11-12 11:54 ` [PATCH 15/32] xfs: verify inode buffers " Dave Chinner
2012-11-12 11:54 ` [PATCH 16/32] xfs: verify btree blocks " Dave Chinner
2012-11-12 11:54 ` [PATCH 17/32] xfs: verify dquot " Dave Chinner
2012-11-14 6:50 ` [PATCH 17/32 V2] " Dave Chinner
2012-11-15 17:55 ` Mark Tinguely
2012-11-15 20:48 ` Dave Chinner
2012-11-15 21:01 ` Mark Tinguely
2012-11-15 21:16 ` Dave Chinner
2012-11-15 21:34 ` Mark Tinguely
2012-11-15 22:01 ` Dave Chinner
2012-11-15 22:09 ` Dave Chinner
2012-11-15 22:26 ` Mark Tinguely
2012-11-15 22:33 ` Dave Chinner
2012-11-16 1:22 ` Dave Chinner
2012-11-12 11:54 ` [PATCH 18/32] xfs: add verifier callback to directory read code Dave Chinner
2012-11-12 11:54 ` [PATCH 19/32] xfs: factor dir2 block read operations Dave Chinner
2012-11-15 3:09 ` Ben Myers
2012-11-15 5:59 ` Dave Chinner
2012-11-12 11:54 ` [PATCH 20/32] xfs: verify dir2 block format buffers Dave Chinner
2012-11-12 11:54 ` [PATCH 21/32] xfs: factor dir2 free block reading Dave Chinner
2012-11-12 11:54 ` [PATCH 22/32] xfs: factor out dir2 data " Dave Chinner
2012-11-12 11:54 ` [PATCH 23/32] xfs: factor dir2 leaf read Dave Chinner
2012-11-12 11:54 ` [PATCH 24/32] xfs: factor and verify attr leaf reads Dave Chinner
2012-11-12 11:54 ` [PATCH 25/32] xfs: add xfs_da_node verification Dave Chinner
2012-11-12 11:54 ` [PATCH 26/32] xfs: Add verifiers to dir2 data readahead Dave Chinner
2012-11-12 11:54 ` [PATCH 27/32] xfs: add buffer pre-write callback Dave Chinner
2012-11-15 6:02 ` [PATCH 27/32 REPOST] " Dave Chinner
2012-11-12 11:54 ` [PATCH 28/32] xfs: add pre-write metadata buffer verifier callbacks Dave Chinner
2012-11-14 6:52 ` [PATCH 28/32 V2] " Dave Chinner
2012-11-14 22:23 ` Mark Tinguely
2012-11-12 11:54 ` [PATCH 29/32] xfs: connect up write verifiers to new buffers Dave Chinner
2012-11-14 6:53 ` [PATCH 29/32 V2] " Dave Chinner
2012-11-12 11:54 ` [PATCH 30/32] xfs: convert buffer verifiers to an ops structure Dave Chinner
2012-11-14 6:54 ` [PATCH 30/32 V2] " Dave Chinner
2012-11-12 11:54 ` [PATCH 31/32] xfs: add CRC infrastructure Dave Chinner
2012-11-12 15:37 ` Mark Tinguely
2012-11-15 22:20 ` [PATCH 31/32 V2] " Dave Chinner
2012-11-12 11:54 ` [PATCH 32/32] xfs: add CRC checks to the log Dave Chinner
2012-11-12 15:37 ` Mark Tinguely [this message]
2012-11-13 23:26 ` [PATCH 00/32] xfs: current queue for 3.8 Ben Myers
2012-11-14 6:02 ` Dave Chinner
2012-11-14 20:42 ` Ben Myers
2012-11-14 21:27 ` Ben Myers
2012-11-15 4:40 ` Ben Myers
2012-11-15 6:03 ` Dave Chinner
2012-11-16 4:31 ` Ben Myers
2012-11-20 2:27 ` Ben Myers
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