linux-kernel - Re: [RFC][PATCH 2/4] sunrpc: Use utsnamespaces

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Date:	Tue, 06 Jan 2009 18:43:37 -0500
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Matt Helsley <matthltc@...ibm.com>
Cc:	"Serge E. Hallyn" <serue@...ibm.com>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	linux-nfs@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Chuck Lever <chuck.lever@...cle.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Containers <containers@...ts.osdl.org>,
	Cedric Le Goater <clg@...ibm.com>
Subject: Re: [RFC][PATCH 2/4] sunrpc: Use utsnamespaces

On Tue, 2009-01-06 at 15:18 -0800, Matt Helsley wrote:
> Yes, I was aware that the inode might be dirtied by another container. I
> was thinking that, at least in the case of NFS, it makes sense to report
> the node name of the container that did the original mount. Of course
> this doesn't address the general RPC client case and, like patch 3, it
> makes the superblock solution rather NFS-specific. That brings me to a
> basic question: Are there any RPC clients in the kernel that do not
> operate on behalf of NFS?

Yes. There is, for instance, the portmapper/rpcbind client. The NFS and
lockd servers also sometime needs to send RPC callbacks. Assuming that
you can convert the RPC client into something NFS-specific is therefore
not an option.

Trond

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