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Re: [PATCH] make growfs check device size limits too

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH] make growfs check device size limits too
From: Nathan Scott <nscott@xxxxxxxxxx>
Date: Fri, 27 Apr 2007 09:45:20 +1000
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20070426071055.GA24411@xxxxxxxxxxxxx>
Organization: Aconex
References: <1177569014.6273.367.camel@edge> <20070426071055.GA24411@xxxxxxxxxxxxx>
Reply-to: nscott@xxxxxxxxxx
Sender: xfs-bounce@xxxxxxxxxxx
On Thu, 2007-04-26 at 08:10 +0100, Christoph Hellwig wrote:
> On Thu, Apr 26, 2007 at 04:30:14PM +1000, Nathan Scott wrote:
> > On the mount path we check for a superblock that describes a filesystem
> > to large for the running kernel to handle.  This catches the case of an
> > attempt to mount a >16TB filesystem on i386 (where we are limited by the
> > page->index size, for XFS metadata buffers in xfs_buf.c).
> > 
> > This patch makes similar checks on the growfs code paths for regular and
> > realtime growth, else we can end up with filesystem corruption, it would
> > seem (from #xfs chatter).  Untested patch follows; probably better to do
> > this as a macro, in a header, and call that in each place...?
> Yeah, the check should probably we in one place only.  Given that's it's
> only used in slow pathes a function would probably do it.

Here's a revised version...



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