netdev - Re: [PATCH 3/5] NFS: search for client session id in proper network namespace

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Date:	Tue, 7 Feb 2012 17:48:52 +0000
From:	"Myklebust, Trond" <Trond.Myklebust@...app.com>
To:	"Schumaker, Bryan" <Bryan.Schumaker@...app.com>
CC:	Stanislav Kinsbursky <skinsbursky@...allels.com>,
	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	"xemul@...allels.com" <xemul@...allels.com>,
	"neilb@...e.de" <neilb@...e.de>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"jbottomley@...allels.com" <jbottomley@...allels.com>,
	"bfields@...ldses.org" <bfields@...ldses.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"devel@...nvz.org" <devel@...nvz.org>
Subject: Re: [PATCH 3/5] NFS: search for client session id in proper network
 namespace

On Tue, 2012-02-07 at 10:43 -0500, Bryan Schumaker wrote:
> On 01/26/12 06:11, Stanislav Kinsbursky wrote:
> 
> > Network namespace is taken from request transport and passed as a part of
> > cb_process_state structure.
> > 
> > Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
> > 
> > ---
> >  fs/nfs/callback.h      |    1 +
> >  fs/nfs/callback_proc.c |    2 +-
> >  fs/nfs/callback_xdr.c  |    1 +
> >  fs/nfs/client.c        |    4 ++--
> >  fs/nfs/internal.h      |    3 ++-
> >  5 files changed, 7 insertions(+), 4 deletions(-)
> > 
> > diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
> > index c89d3b9..197e0d3 100644
> > --- a/fs/nfs/callback.h
> > +++ b/fs/nfs/callback.h
> > @@ -39,6 +39,7 @@ struct cb_process_state {
> >  	__be32			drc_status;
> >  	struct nfs_client	*clp;
> >  	int			slotid;
> > +	struct net		*net;
> >  };
> >  
> >  struct cb_compound_hdr_arg {
> > diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
> > index 0e6e63f..f71978d 100644
> > --- a/fs/nfs/callback_proc.c
> > +++ b/fs/nfs/callback_proc.c
> > @@ -461,7 +461,7 @@ __be32 nfs4_callback_sequence(struct cb_sequenceargs *args,
> >  	int i;
> >  	__be32 status = htonl(NFS4ERR_BADSESSION);
> >  
> > -	clp = nfs4_find_client_sessionid(args->csa_addr, &args->csa_sessionid);
> > +	clp = nfs4_find_client_sessionid(cps->net, args->csa_addr, &args->csa_sessionid);
> >  	if (clp == NULL)
> >  		goto out;
> >  
> > diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
> > index f2be3e1e..8c2a969 100644
> > --- a/fs/nfs/callback_xdr.c
> > +++ b/fs/nfs/callback_xdr.c
> > @@ -861,6 +861,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
> >  		.drc_status = 0,
> >  		.clp = NULL,
> >  		.slotid = -1,
> > +		.net = rqstp->rq_xprt->xpt_net,
> >  	};
> >  	unsigned int nops = 0;
> >  
> > diff --git a/fs/nfs/client.c b/fs/nfs/client.c
> > index 9e11d29..2328dcb 100644
> > --- a/fs/nfs/client.c
> > +++ b/fs/nfs/client.c
> > @@ -1232,11 +1232,11 @@ nfs4_find_client_ident(struct net *net, int cb_ident)
> >   * Returns NULL if no such client
> >   */
> >  struct nfs_client *
> > -nfs4_find_client_sessionid(const struct sockaddr *addr,
> > +nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr,
> >  			   struct nfs4_sessionid *sid)
> >  {
> >  	struct nfs_client *clp;
> > -	struct nfs_net *nn = net_generic(&init_net, nfs_net_id);
> > +	struct nfs_net *nn = net_generic(net, nfs_net_id);
> 
> 
> Hi,
> 
> You changed this function for the v4.1 case, but not for v4.0 (this is what I was trying to bisect earlier).  Without CONFIG_NFS_V4_1 set, I get this:
> 
>  make[1]: Nothing to be done for `all'.
>   CHK     include/linux/version.h
>   CHK     include/generated/utsrelease.h
>   CALL    scripts/checksyscalls.sh
>   CHK     include/generated/compile.h
>   CHK     kernel/config_data.h
>   CC [M]  fs/nfs/client.o
> fs/nfs/client.c:1265:1: error: conflicting types for 'nfs4_find_client_sessionid'
> fs/nfs/internal.h:155:1: note: previous declaration of 'nfs4_find_client_sessionid' was here
> make[2]: *** [fs/nfs/client.o] Error 1
> make[1]: *** [fs/nfs] Error 2
> make: *** [fs] Error 2

Thanks for tracking this down Bryan!

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@...app.com
www.netapp.com