linux-ext4 - Re: [PATCH 3/4] RFC: Remove check for a 32-bit cookie in nfsd4

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Message-ID: <20110809173145.GA16206@fieldses.org>
Date:	Tue, 9 Aug 2011 13:31:45 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Bernd Schubert <bernd.schubert@...m.fraunhofer.de>
Cc:	linux-nfs@...r.kernel.org, linux-ext4@...r.kernel.org,
	hch@...radead.org, yong.fan@...mcloud.com,
	linux-fsdevel@...r.kernel.org, tytso@....edu, adilger@...mcloud.com
Subject: Re: [PATCH 3/4] RFC: Remove check for a 32-bit cookie in
 nfsd4_readdir()

On Mon, Aug 08, 2011 at 05:38:08PM +0200, Bernd Schubert wrote:
> Fan Yong <yong.fan@...mcloud.com> noticed setting
> FMODE_32bithash wouldn't work with nfsd v4, as
> nfsd4_readdir() checks for 32 bit cookies. However, according to RFC 3530
> cookies have a 64 bit type and cookies are also defined as u64 in
> 'struct nfsd4_readdir'. So remove the test for >32-bit values.

Wow, thanks, I wonder where that check came from.  Looks like it was
there since the very first nfsv4 commit.

Applying.

--b.

> 
> Signed-off-by: Bernd Schubert <bernd.schubert@...m.fraunhofer.de>
> ---
>  fs/nfsd/nfs4proc.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
> index e807776..9bf0a66 100644
> --- a/fs/nfsd/nfs4proc.c
> +++ b/fs/nfsd/nfs4proc.c
> @@ -691,7 +691,7 @@ nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
>  	readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
>  	readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
>  
> -	if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
> +	if ((cookie == 1) || (cookie == 2) ||
>  	    (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
>  		return nfserr_bad_cookie;
>  
> 
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