netdev - Re: [PATCH ethtool v2 0/3] Add extended link state

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Date:   Mon, 6 Jul 2020 01:45:51 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Amit Cohen <amitc@...lanox.com>
Cc:     netdev@...r.kernel.org, o.rempel@...gutronix.de, andrew@...n.ch,
        f.fainelli@...il.com, jacob.e.keller@...el.com, mlxsw@...lanox.com
Subject: Re: [PATCH ethtool v2 0/3] Add extended link state

On Thu, Jul 02, 2020 at 04:11:08PM +0300, Amit Cohen wrote:
> Currently, device drivers can only indicate to user space if the network
> link is up or down, without additional information.
> 
> This patch set expand link-state to allow these drivers to expose more
> information to user space about the link state. The information can save
> users' time when trying to understand why a link is not operationally up,
> for example.
> 
> The above is achieved by extending the existing ethtool LINKSTATE_GET
> command with attributes that carry the extended state.
> 
> For example, no link due to missing cable:
> 
> $ ethtool ethX
> ...
> Link detected: no (No cable)
> 
> Beside the general extended state, drivers can pass additional
> information about the link state using the sub-state field. For example:
> 
> $ ethtool ethX
> ...
> Link detected: no (Autoneg, No partner detected)
> 
> Changes since v1:
> 
> * Do not mix uapi header updates with other changes
> * Update header files in uapi/ to a net-next snapshot
> * Move helper functions from common.c to netlink/settings.c
> * Use string tables for enum strings
> * Report the numeric value in case of unknown value
> * Use banner once, change print concept

Applied to branch next (to be merged after 5.8 release), thank you.

Michal

> Amit Cohen (3):
>   uapi: linux: update kernel UAPI header files
>   netlink: desc-ethtool.c: Add descriptions of extended state attributes
>   netlink: settings: expand linkstate_reply_cb() to support link
>     extended state
> 
>  netlink/desc-ethtool.c       |   2 +
>  netlink/settings.c           | 147 ++++++++++++++++++++++++++++++++++-
>  uapi/linux/ethtool.h         |  70 +++++++++++++++++
>  uapi/linux/ethtool_netlink.h |   2 +
>  4 files changed, 220 insertions(+), 1 deletion(-)
> 
> -- 
> 2.20.1
> 

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