linux-kernel - Re: [PATCH 1/3] BTRFS: support NFSv2 export

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Message-ID: <20150511081309.GI23255@suse.cz>
Date:	Mon, 11 May 2015 10:13:09 +0200
From:	David Sterba <dsterba@...e.cz>
To:	NeilBrown <neilb@...e.de>
Cc:	Josef Bacik <jbacik@...com>, Chris Mason <clm@...com>,
	Jan Kara <jack@...e.cz>,
	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>,
	linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-nilfs@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-btrfs@...r.kernel.org
Subject: Re: [PATCH 1/3] BTRFS: support NFSv2 export

On Fri, May 08, 2015 at 10:16:23AM +1000, NeilBrown wrote:
> The "fh_len" passed to ->fh_to_* is not guaranteed to be that same as
> that returned by encode_fh - it may be larger.
> 
> With NFSv2, the filehandle is fixed length, so it may appear longer
> than expected and be zero-padded.
> 
> So we must test that fh_len is at least some value, not exactly equal
> to it.
> 
> Signed-off-by: NeilBrown <neilb@...e.de>

Acked-by: David Sterba <dsterba@...e.cz>
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