netdev - Re: [net-next 4/4] gve: Add ethtool support

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Date:   Mon, 1 Jul 2019 16:37:38 -0700
From:   Catherine Sullivan <csully@...gle.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev@...r.kernel.org, Sagi Shahar <sagis@...gle.com>,
        Jon Olson <jonolson@...gle.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Luigi Rizzo <lrizzo@...gle.com>
Subject: Re: [net-next 4/4] gve: Add ethtool support

On Fri, Jun 28, 2019 at 7:44 PM Florian Fainelli <f.fainelli@...il.com> wrote:
>
>
>
> On 6/26/2019 11:52 AM, Catherine Sullivan wrote:
>
> [snip]
>
> > +static void
> > +gve_get_ethtool_stats(struct net_device *netdev,
> > +                   struct ethtool_stats *stats, u64 *data)
> > +{
> > +     struct gve_priv *priv = netdev_priv(netdev);
> > +     u64 rx_pkts, rx_bytes, tx_pkts, tx_bytes;
> > +     int ring;
> > +     int i;
> > +
> > +     ASSERT_RTNL();
> > +
> > +     if (!netif_carrier_ok(netdev))
> > +             return;
> > +
> > +     for (rx_pkts = 0, rx_bytes = 0, ring = 0;
> > +          ring < priv->rx_cfg.num_queues; ring++) {
> > +             rx_pkts += priv->rx[ring].rpackets;
> > +             rx_bytes += priv->rx[ring].rbytes;
> > +     }
> > +     for (tx_pkts = 0, tx_bytes = 0, ring = 0;
> > +          ring < priv->tx_cfg.num_queues; ring++) {
> > +             tx_pkts += priv->tx[ring].pkt_done;
> > +             tx_bytes += priv->tx[ring].bytes_done;
> > +     }
>
> Maybe you do not need to support 32-bit guests with that driver, but you
> might as well be correct and use the include/linux/u64_stats_sync.h
> primitives to help return consistent 64-bit stats on 32-bit machines.

Done in v4, thanks.

>
> [snip]
>
> > +int gve_adjust_queues(struct gve_priv *priv,
> > +                   struct gve_queue_config new_rx_config,
> > +                   struct gve_queue_config new_tx_config)
> > +{
> > +     int err;
> > +
> > +     if (netif_carrier_ok(priv->dev)) {
>
> Should not that be netif_running()?
> --
> Florian