From: Andy Adamson <andros@netapp.com>
To: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: linux-nfs@vger.kernel.org
Subject: Re: [PATCH 1/1] NFSv4.1: handle decoding of three attribute bitmaps
Date: Mon, 11 Jul 2011 14:30:14 -0400 [thread overview]
Message-ID: <C42C21AC-EABC-48F2-85DE-79EF1EEEA13B@netapp.com> (raw)
In-Reply-To: <1310407708.12660.2.camel@lade.trondhjem.org>
On Jul 11, 2011, at 2:08 PM, Trond Myklebust wrote:
> On Mon, 2011-07-11 at 13:54 -0400, andros@netapp.com wrote:
>> From: Andy Adamson <andros@netapp.com>
>>
>> Attribute IDs assigned in RFC 5661 now require three bitmaps.
>>
>> Signed-off-by: Andy Adamson <andros@netapp.com>
>> Cc:stable@kernel.org [2.6.39]
>
> Is this really so urgent?
>
> [trondmy@lade linux-2.6]$ git grep FATTR4_WORD2 fs/nfs include/linux
> include/linux/nfs4.h:#define FATTR4_WORD2_SUPPATTR_EXCLCREAT (1UL << 11)
> include/linux/nfs4.h:#define FATTR4_WORD2_LAYOUT_BLKSIZE (1UL << 1)
>
> IOW: we don't appear to be using any of those bits, and so the current
> default behaviour of just ignoring any bitmap values that we don't
> recognise would seem to be sufficient.
I should have given more context :)
In testing nfs4_getfacl, OnTap returns three attribute bits which triggered a BUG_ON in xdr_shrink_bufhead
as the third bitmap was incorrectly interpreted as the length.
Plus, RFC 5661 defines suppattr_exclcreat bit 75 as a mandatory attribute which means it can/will be returned with any supported attributes query.
So, I think this needed and is a candidate for stable.
-->Andy
>
> Cheers
> Trond
> --
> Trond Myklebust
> Linux NFS client maintainer
>
> NetApp
> Trond.Myklebust@netapp.com
> www.netapp.com
>
next prev parent reply other threads:[~2011-07-11 18:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-11 17:54 [PATCH 1/1] NFSv4.1: handle decoding of three attribute bitmaps andros
2011-07-11 18:08 ` Trond Myklebust
2011-07-11 18:30 ` Andy Adamson [this message]
2011-07-11 18:49 ` Trond Myklebust
2011-07-11 20:59 ` Andy Adamson
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