linux-kernel - Re: [PATCH V2 net-next 7/8] net: hns3: Add Ethtool support to HNS3 driver

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Message-ID: <20170613165514.757eb40f@xeon-e3>
Date:   Tue, 13 Jun 2017 16:55:14 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Salil Mehta <salil.mehta@...wei.com>
Cc:     <davem@...emloft.net>, <yisen.zhuang@...wei.com>,
        <huangdaode@...ilicon.com>, <lipeng321@...wei.com>,
        <mehta.salil.lnk@...il.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>
Subject: Re: [PATCH V2 net-next 7/8] net: hns3: Add Ethtool support to HNS3
 driver

On Wed, 14 Jun 2017 00:10:34 +0100
Salil Mehta <salil.mehta@...wei.com> wrote:

> +/* netdev related stats */
> +#define HNS3_NETDEV_STAT(_string, _member)			\
> +	{ _string,						\
> +	  FIELD_SIZEOF(struct rtnl_link_stats64, _member),	\
> +	  offsetof(struct rtnl_link_stats64, _member),		\
> +	}
> +
> +static const struct hns3_stats hns3_netdev_stats[] = {
> +	/* misc. Rx/Tx statistics */
> +	HNS3_NETDEV_STAT("rx_packets", rx_packets),
> +	HNS3_NETDEV_STAT("tx_packets", tx_packets),
> +	HNS3_NETDEV_STAT("rx_bytes", rx_bytes),
> +	HNS3_NETDEV_STAT("tx_bytes", tx_bytes),
> +	HNS3_NETDEV_STAT("rx_errors", rx_errors),
> +	HNS3_NETDEV_STAT("tx_errors", tx_errors),
> +	HNS3_NETDEV_STAT("rx_dropped", rx_dropped),
> +	HNS3_NETDEV_STAT("tx_dropped", tx_dropped),
> +	HNS3_NETDEV_STAT("multicast", multicast),
> +	HNS3_NETDEV_STAT("collisions", collisions),
> +
> +	/* detailed Rx errors */
> +	HNS3_NETDEV_STAT("rx_length_errors", rx_length_errors),
> +	HNS3_NETDEV_STAT("rx_over_errors", rx_over_errors),
> +	HNS3_NETDEV_STAT("rx_crc_errors", rx_crc_errors),
> +	HNS3_NETDEV_STAT("rx_frame_errors", rx_frame_errors),
> +	HNS3_NETDEV_STAT("rx_fifo_errors", rx_fifo_errors),
> +	HNS3_NETDEV_STAT("rx_missed_errors", rx_missed_errors),
> +
> +	/* detailed Tx errors */
> +	HNS3_NETDEV_STAT("tx_aborted_errors", tx_aborted_errors),
> +	HNS3_NETDEV_STAT("tx_carrier_errors", tx_carrier_errors),
> +	HNS3_NETDEV_STAT("tx_fifo_errors", tx_fifo_errors),
> +	HNS3_NETDEV_STAT("tx_heartbeat_errors", tx_heartbeat_errors),
> +	HNS3_NETDEV_STAT("tx_window_errors", tx_window_errors),
> +

Ethtool statistics should be reserved for device specific values and
should not be used just to clone statistics that already exist in
the network device.