linux-kernel - Re: [PATCH] AFS: Implement file locking

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Message-Id: <A02B7736-39AA-4B50-B682-756C387AEDEC@mac.com>
Date:	Fri, 25 May 2007 23:11:33 -0400
From:	Kyle Moffett <mrmacman_g4@....com>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	David Howells <dhowells@...hat.com>, akpm@...l.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] AFS: Implement file locking

On May 25, 2007, at 22:23:42, J. Bruce Fields wrote:
> On Thu, May 24, 2007 at 05:55:54PM +0100, David Howells wrote:
>> +	/* only whole-file locks are supported */
>> +	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
>> +		return -EINVAL;
>
> Do you allow upgrades and downgrades?  (Just curious.)

I was actually under the impression that OpenAFS had support for byte- 
range locking (as well as lock upgrade/downgrade); though IIRC there  
was some secondary protocol.  That's probably why the support is so  
basic at the moment; David's getting the basics in first and the more  
complicated stuff can come later.

Cheers,
Kyle Moffett

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