linux-kernel - Re: [RFC][PATCH 00/18] crypto: Add generic Kerberos library

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Date:   Thu, 12 Nov 2020 16:07:47 -0500
From:   Bruce Fields <bfields@...ldses.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Chuck Lever <chuck.lever@...cle.com>,
        CIFS <linux-cifs@...r.kernel.org>,
        Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        linux-crypto@...r.kernel.org,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linux-afs@...ts.infradead.org
Subject: Re: [RFC][PATCH 00/18] crypto: Add generic Kerberos library

On Thu, Nov 12, 2020 at 04:54:06PM +0000, David Howells wrote:
> Chuck Lever <chuck.lever@...cle.com> wrote:
> 
> > Really? My understanding of the Linux kernel SUNRPC implementation is
> > that it uses asynchronous, even for small data items. Maybe I'm using
> > the terminology incorrectly.
> 
> Seems to be synchronous, at least in its use of skcipher:

Yes, it's all synchronous.  The only cases where we defer and revisit a
request is when we need to do upcalls to userspace.

(And those upcalls mostly come after we're done with unwrapping and
verifying a request, so now I'm sort of curious exactly what Chuck was
seeing.)

--b.