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

[Matt Helsley <matthltc@us.ibm.com>]

On Tue, 2009-01-06 at 18:53 -0500, J. Bruce Fields wrote:
> On Tue, Jan 06, 2009 at 06:35:43PM -0500, Trond Myklebust wrote:
> > On Tue, 2009-01-06 at 18:32 -0500, J. Bruce Fields wrote:
> > > On Tue, Jan 06, 2009 at 06:15:34PM -0500, Trond Myklebust wrote:
> > > > On Tue, 2009-01-06 at 15:04 -0800, Eric W. Biederman wrote:
> > > > > That implies to me you want to capture the value at mount time, and to
> > > > > pass it in to the rpc_call creation, and only at very specific well
> > > > > defined points where we interact with user space should we examine
> > > > > current->utsname().  At which point there should be no question
> > > > > of current->utsname() is valid as the user space process is alive.
> > > > 
> > > > Why pretend that the filesystem is owned by a particular namespace? It
> > > > can, and will be shared among many containers...
> > > 
> > > If the only purpose of this is to fill in the auth_unix cred then
> > > shouldn't it be part of whatever cred structures are passed around?
> > 
> > So how does tracking it in a shared structure like the rpc_client help?
> > If you consider it to be part of the cred, then it needs to be tracked
> > in the cred...
> 
> Right, that's what I meant.
> 
> It seems like overkill, though.  Does anyone actually care whether these
> names are right?

That's certainly a tempting angle. However we may not "control" the
server code -- couldn't there be some oddball (maybe even proprietary)
NFS servers out there that users do care about interacting with?

Cheers,
	-Matt Helsley