On Mon, 30 Sep 2013 11:00:13 -0400
"J. Bruce Fields" <bfields@xxxxxxxxxxxx> wrote:
> On Mon, Sep 30, 2013 at 10:00:00AM -0400, Jeff Layton wrote:
> > On Mon, 30 Sep 2013 13:06:47 +0100
> > Michael Gliwinski <Michael.Gliwinski@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > > Hi all,
> > >
> > > On RHEL6 nfs-utils-1.2.3-36
> > >
> > > man rpc.gssd says it -t wasn't specified then kernel gss contexts will be
> > > cached for the lifettime of the Kerberos service ticket used in its creation.
> > > Is there a way to see the contexts + service tickets in that cache?
> > >
> >
> > No, AFAIK.
> >
> > > Also, is there any way short of rebooting the client to evict one entry from
> > > that cache, or even clear the cache entirely?
> > >
> >
> > There is a gss_destroy_creds script which ships as part of nfs-utils.
> > That should basically do what you need, but it's not well-documented so
> > you'll have to play with it some...
>
> My memory is that depended on some undocumented feature of the upcall
> since removed. (Maybe the ability to send a downcall that isn't a
> response to some upcall?) But I may be misremembering. Somebody should
> probably check and remove that script (and gss_cltn_send_err) if I'm
> right.
>
That appears to be correct. gss_clnt_send_err just does an unsolicited
downcall to the given clnt directory for a given uid. AFAICT, that
functionality was ripped out by this commit:
commit 3b68aaeaf54065e5c44583a1d33ffb7793953ba4
Author: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
Date: Thu Jun 7 10:14:15 2007 -0400
SUNRPC: Always match an upcall message in gss_pipe_downcall()
...so Bruce appears to be correct and this command no longer serves any
purpose. I'll spin up a patch to remove it.
Michael, you can disregard my earlier suggestion to use it....
--
Jeff Layton <jlayton@xxxxxxxxxx>
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