lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <CAA8EJprrcH3T8_aA7bZhZXKiWMXjUTZkvLkQzteHUG4_7e4i8w@mail.gmail.com>
Date:   Tue, 5 Dec 2023 16:22:45 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org
Subject: Re: [PATCH v2 0/2] Add MHI Endpoint network driver

On Mon, 4 Dec 2023 at 18:12, Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Mon, 4 Dec 2023 14:12:12 +0200 Dmitry Baryshkov wrote:
> > Ok, here you are talking about the control path. I can then assume
> > that you consider it to be fine to use netdev for the EP data path, if
> > the control path is kept separate and those two can not be mixed. Does
> > that sound correct?
>
> If datapath == traffic which is intended to leave the card via
> the external port, then yes.

Then I think I understand what causes the confusion.

The MHI netdev is used to deliver network traffic to the modem CPU,
but it is not the controlpath.
For the control path we have non-IP MHI channels (QMI, IPCR, etc).
This can be the traffic targeting e.g. SSH or HTTP server running on
the EP side of the link.

I probably fail to see the difference between this scenario and the
proper virtio netdev which also allows us to send the same IPv4/v6
traffic to the CPU on the EP side.

-- 
With best wishes
Dmitry

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ