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Re: [PATCH 08/32] xfs: make growfs initialise the AGFL header

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 08/32] xfs: make growfs initialise the AGFL header
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Sat, 24 Nov 2012 08:27:50 +1100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20121123124119.GC12150@xxxxxxxxxxxxx>
References: <1352721264-3700-1-git-send-email-david@xxxxxxxxxxxxx> <1352721264-3700-9-git-send-email-david@xxxxxxxxxxxxx> <20121123124119.GC12150@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Fri, Nov 23, 2012 at 07:41:19AM -0500, Christoph Hellwig wrote:
> On Mon, Nov 12, 2012 at 10:54:00PM +1100, Dave Chinner wrote:
> > From: Dave Chinner <dchinner@xxxxxxxxxx>
> > 
> > For verification purposes, AGFLs need to be initialised to a known
> > set of values. For upcoming CRC changes, they are also headers that
> > need to be initialised. Currently, growfs does neither for the AGFLs
> > - it ignores them completely. Add initialisation of the AGFL to be
> > full of invalid block numbers (NULLAGBLOCK) to put the
> > infrastructure in place needed for CRC support.
> > 
> > Includes a comment clarification from Jeff Liu.
> Looks good.
> If you plan to touch this code even more I'd suggst splitting out a
> helper for each kinda of block / header that is initialized from
> xfs_growfs_data_private.

I thought about doing that, but in the end I wanted to avoid
structural changes as much as possible. As it is, I do need to touch
bits of it for the CRC code - refactoring it will involve rebasing
several patches though... :/


Dave Chinner

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