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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Thu, 28 May 2020 10:40:52 +0200
From:   Oleksij Rempel <>
To:     Amit Cohen <>
Cc:     "" <>, mlxsw <>,
        "" <>
Subject: Re: Link down reasons

On Wed, May 27, 2020 at 03:41:22PM +0000, Amit Cohen wrote:
> Hi Andrew,
> We are planning to send a set that exposes link-down reason in ethtool.
> It seems that the ability of your set "Ethernet cable test support" can be integrated with link-down reason.
> The idea is to expose reason and subreason (if there is):
> $ ethtool ethX
> ...
> Link detected: no (No cable) // No sub reason
> $ ethtool ethY
> Link detected: no (Autoneg failure, No partner detected)
> Currently we have reason "cable issue" and subreasons "unsupported cable" and "shorted cable".
> The mechanism of cable test can be integrated and allow us report "cable issue" reason and "shorted cable" subreason.
> However, the way the kernel reports the results of the cable test (cable-test, some seconds, get-result) may be problematic with link-down reason concept.
> We can ignore this information when reporting link-down reason, or report only if testing cable have a result,
> or maybe start testing cable and meanwhile report something like "discovery in progress". But all the options are not perfect.
> We would like to know your opinion about it.

I would add some more reasons:
- master slave resolution issues: both link partners are master or
- signal quality drop. In this case driver should be extended to notify
  the system if SQI is under some configurable limit.

Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       |  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)

Powered by blists - more mailing lists