linux-kernel - RE: [[PATCH v1] 16/37] [CIFS] SMBD: Post a SMBD message with no payload

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Message-ID: <CY4PR21MB0182AF2A752D333E367F2FC4A08C0@CY4PR21MB0182.namprd21.prod.outlook.com>
Date:   Mon, 14 Aug 2017 19:00:06 +0000
From:   Tom Talpey <ttalpey@...rosoft.com>
To:     Long Li <longli@...rosoft.com>,
        Christoph Hellwig <hch@...radead.org>
CC:     Steve French <sfrench@...ba.org>,
        "linux-cifs@...r.kernel.org" <linux-cifs@...r.kernel.org>,
        "samba-technical@...ts.samba.org" <samba-technical@...ts.samba.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [[PATCH v1] 16/37] [CIFS] SMBD: Post a SMBD message with no
 payload

> -----Original Message-----
> From: linux-cifs-owner@...r.kernel.org [mailto:linux-cifs-
> owner@...r.kernel.org] On Behalf Of Long Li
> Sent: Monday, August 14, 2017 2:20 PM
> To: Christoph Hellwig <hch@...radead.org>
> Cc: Steve French <sfrench@...ba.org>; linux-cifs@...r.kernel.org; samba-
> technical@...ts.samba.org; linux-kernel@...r.kernel.org
> Subject: RE: [[PATCH v1] 16/37] [CIFS] SMBD: Post a SMBD message with no
> payload
> 
> > > Implement the function to send a SMBD message with no payload. This is
> > required at times when we want to extend credtis to server to have it
> > continue to send data, without sending any actual data payload.
> >
> > Shouldn't this just be implemented as a special case in the version that posts
> > data?
> 
> It uses a different packet format "struct smbd_data_transfer_no_data". I can
> restructure some common code to share between packet sending functions.

The SMB Direct keepalive is just a Data Transfer Message with no payload
(MS-SMBD section 2.2.3) and the SMB_DIRECT_RESPONSE_REQUESTED flag
possibly set.  I don't see any need to define a special structure to describe this?

Tom.