netdev - Re: [RFC PATCH net-next 1/3] ethtool: Add link down reason callback

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Message-ID: <20170621084317.45879939@xeon-e3>
Date:   Wed, 21 Jun 2017 08:43:17 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Gal Pressman <galp@...lanox.com>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        "John W. Linville" <linville@...driver.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Vidya Sagar Ravipati <vidya@...ulusnetworks.com>,
        Jiri Pirko <jiri@...lanox.com>,
        David Decotigny <decot@...glers.com>, kernel-team@...com
Subject: Re: [RFC PATCH net-next 1/3] ethtool: Add link down reason callback

On Wed, 21 Jun 2017 16:04:44 +0300
Gal Pressman <galp@...lanox.com> wrote:

> +
> +enum {
> +	ETHTOOL_LINK_VENDOR_SPECIFIC = -1, /* Vendor specific issue provided in vendor_reason */
> +	ETHTOOL_LINK_NO_ISSUE, /* No issue observed with link */
> +	ETHTOOL_LINK_REASON_UNKNOWN, /* Unknown reason */
> +	ETHTOOL_LINK_NETDEV_CARRIER_DOWN, /* Netdev carrier is down */
> +	ETHTOOL_LINK_ADMIN_DOWN, /* Admin down */
> +	ETHTOOL_LINK_AN_FAILED, /* Auto negotiation failed */
> +	ETHTOOL_LINK_TRAINING_FAILED, /* Link training failed */
> +	ETHTOOL_LINK_RMT_FAULT, /* Remote fault indication */
> +	ETHTOOL_LINK_BAD_SIGNAL_INTEGRITY, /* Bad signal integrity */
> +	ETHTOOL_LINK_CABLE_MISMATCH, /* Cable protocol mismatch */
> +	ETHTOOL_LINK_INTERNAL_ERR, /* Internal error */
> +	ETHTOOL_LINK_CABLE_UNPLUGGED, /* Cable unplugged */
> +	ETHTOOL_LINK_UNSUPP_MODULE, /* Unsupported module */
> +	ETHTOOL_LINK_I2C_BUS_ERR, /* I2C bus error */
> +	ETHTOOL_LINK_UNSUPP_EEPROM, /* Unsupported EEPROM */
> +	ETHTOOL_LINK_OVERTEMP, /* Over temperature */
> +	ETHTOOL_LINK_PWR_BUDGET_EXC, /* Power budget exceeded */
> +	ETHTOOL_LINK_MODULE_ADMIN_DOWN, /* Module admin down */
> +
> +	ETHTOOL_LINK_REASONS_COUNT
> +};

Any enumerated list is going to get changed too often.
Could the API just return a string?