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From:   David Howells <dhowells@redhat.com>
In-Reply-To: <88b441af-d6ae-4d46-aae5-0b649e76031d@samba.org>
References: <88b441af-d6ae-4d46-aae5-0b649e76031d@samba.org> <3609b064-175c-fc18-cd1a-e177d0349c58@samba.org> <166855224228.1998592.2212551359609792175.stgit@warthog.procyon.org.uk> <2147870.1668582019@warthog.procyon.org.uk>
To:     Stefan Metzmacher <metze@samba.org>
Cc:     dhowells@redhat.com, smfrench@gmail.com, tom@talpey.com,
        Long Li <longli@microsoft.com>,
        Namjae Jeon <linkinjeon@kernel.org>,
        linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] cifs: Fix problem with encrypted RDMA data read
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Date:   Wed, 16 Nov 2022 12:14:51 +0000
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Stefan Metzmacher <metze@samba.org> wrote:

> > Stefan Metzmacher <metze@samba.org> wrote:
> > =

> >> I'm not sure I understand why this would fix anything when encryption=
 is
> >> enabled.
> >>
> >> Is the payload still be offloaded as plaintext? Otherwise we wouldn't=
 have
> >> use_rdma_mr...  So this rather looks like a fix for the non encrypted=
 case.
> > The "inline"[*] PDUs are encrypted, but the direct RDMA data transmiss=
ion is
> > not.  I'm not sure if this is a bug in ksmbd.
> =

> It's a bug in the client!

Well, if you can fix it the right way, I can test the patch.  I'm not sure
what that would be if not what I suggested.

David