netdev - Re: [PATCH 3/3] net: xfrm: use core API for updating TX stats

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Message-ID: <59b6c94d-e0de-e4f5-d02e-e799694f6dc8@gmail.com>
Date:   Fri, 13 Nov 2020 08:46:48 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Lev Stipakov <lstipakov@...il.com>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Lev Stipakov <lev@...nvpn.net>
Subject: Re: [PATCH 3/3] net: xfrm: use core API for updating TX stats

Am 12.11.2020 um 12:13 schrieb Lev Stipakov:
> Commit d3fd65484c781 ("net: core: add dev_sw_netstats_tx_add") has added
> function "dev_sw_netstats_tx_add()" to update net device per-cpu TX
> stats.
> 
> Use this function instead of own code.
> 
LGTM. In addition you can replace xfrmi_get_stats64() with
dev_get_tstats64().

> Signed-off-by: Lev Stipakov <lev@...nvpn.net>
> ---
>  net/xfrm/xfrm_interface.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c
> index 9b8e292a7c6a..43ee4c5a6fa9 100644
> --- a/net/xfrm/xfrm_interface.c
> +++ b/net/xfrm/xfrm_interface.c
> @@ -319,12 +319,7 @@ xfrmi_xmit2(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
>  
>  	err = dst_output(xi->net, skb->sk, skb);
>  	if (net_xmit_eval(err) == 0) {
> -		struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
> -
> -		u64_stats_update_begin(&tstats->syncp);
> -		tstats->tx_bytes += length;
> -		tstats->tx_packets++;
> -		u64_stats_update_end(&tstats->syncp);
> +		dev_sw_netstats_tx_add(dev, 1, length);
>  	} else {
>  		stats->tx_errors++;
>  		stats->tx_aborted_errors++;
>