netdev - Re: [PATCH v2 3/3] netlink: add LINKSTATE SQI support

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Message-ID: <20200607202452.md4nnp47cfjetylp@lion.mk-sys.cz>
Date:   Sun, 7 Jun 2020 22:24:52 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Andrew Lunn <andrew@...n.ch>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        "John W. Linville" <linville@...driver.com>,
        David Jander <david@...tonic.nl>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Russell King <linux@...linux.org.uk>, mkl@...gutronix.de,
        Marek Vasut <marex@...x.de>,
        Christian Herber <christian.herber@....com>,
        Amit Cohen <amitc@...lanox.com>,
        Petr Machata <petrm@...lanox.com>
Subject: Re: [PATCH v2 3/3] netlink: add LINKSTATE SQI support

On Thu, May 28, 2020 at 01:54:14PM +0200, Oleksij Rempel wrote:
> Some PHYs provide Signal Quality Index (SQI) if the link is in active
> state. This information can help to diagnose cable and system design
> related issues.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

Reviewed-by: Michal Kubecek <mkubecek@...e.cz>

> ---
>  netlink/desc-ethtool.c |  2 ++
>  netlink/settings.c     | 16 ++++++++++++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/netlink/desc-ethtool.c b/netlink/desc-ethtool.c
> index b0a793c..8f4c36b 100644
> --- a/netlink/desc-ethtool.c
> +++ b/netlink/desc-ethtool.c
> @@ -93,6 +93,8 @@ static const struct pretty_nla_desc __linkstate_desc[] = {
>  	NLATTR_DESC_INVALID(ETHTOOL_A_LINKSTATE_UNSPEC),
>  	NLATTR_DESC_NESTED(ETHTOOL_A_LINKSTATE_HEADER, header),
>  	NLATTR_DESC_BOOL(ETHTOOL_A_LINKSTATE_LINK),
> +	NLATTR_DESC_U32(ETHTOOL_A_LINKSTATE_SQI),
> +	NLATTR_DESC_U32(ETHTOOL_A_LINKSTATE_SQI_MAX),
>  };
>  
>  static const struct pretty_nla_desc __debug_desc[] = {
> diff --git a/netlink/settings.c b/netlink/settings.c
> index 851de15..cd4b9a7 100644
> --- a/netlink/settings.c
> +++ b/netlink/settings.c
> @@ -638,6 +638,22 @@ int linkstate_reply_cb(const struct nlmsghdr *nlhdr, void *data)
>  		printf("\tLink detected: %s\n", val ? "yes" : "no");
>  	}
>  
> +	if (tb[ETHTOOL_A_LINKSTATE_SQI]) {
> +		uint32_t val = mnl_attr_get_u32(tb[ETHTOOL_A_LINKSTATE_SQI]);
> +
> +		print_banner(nlctx);
> +		printf("\tSQI: %u", val);
> +
> +		if (tb[ETHTOOL_A_LINKSTATE_SQI_MAX]) {
> +			uint32_t max;
> +
> +			max = mnl_attr_get_u32(tb[ETHTOOL_A_LINKSTATE_SQI_MAX]);
> +			printf("/%u\n", max);
> +		} else {
> +			printf("\n");
> +		}
> +	}
> +
>  	return MNL_CB_OK;
>  }
>  
> -- 
> 2.26.2
> 

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