linux-kernel - Re: [RFC PATCH net-next 04/10] ethtool: Add link extended state

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Date:   Sun, 7 Jun 2020 17:30:34 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Amit Cohen <amitc@...lanox.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        corbet@....net, jiri@...lanox.com, idosch@...lanox.com,
        shuah@...nel.org, mkubecek@...e.cz, gustavo@...eddedor.com,
        cforno12@...ux.vnet.ibm.com, f.fainelli@...il.com,
        linux@...pel-privat.de, alexandru.ardelean@...log.com,
        ayal@...lanox.com, petrm@...lanox.com, mlxsw@...lanox.com,
        liuhangbin@...il.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [RFC PATCH net-next 04/10] ethtool: Add link extended state

> +/**
> + * enum ethtool_ext_substate_cable_issue - more information in
> + * addition to ETHTOOL_EXT_STATE_CABLE_ISSUE.
> + */
> +enum ethtool_ext_substate_cable_issue {
> +	ETHTOOL_EXT_SUBSTATE_UNSUPPORTED_CABLE = 1,
> +	ETHTOOL_EXT_SUBSTATE_SHORTED_CABLE,
> +};

I'm not too happy about shorted cable. I can see this getting extended
to open cable, shorted to another pair, etc. It then becomes a
duplicate of the PHY cable testing infrastructure. A more generic

> +	ETHTOOL_EXT_SUBSTATE_CABLE_TEST_FAILURE,

would be better, and then the user can use then use the cable testing
infrastructure to get the full details.

	Andrew