netdev - Re: [PATCH 1/3] net: mac80211: use core API for updating TX stats

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Message-ID: <44c8b5ae-3630-9d98-1ab4-5f57bfe0886c@gmail.com>
Date:   Fri, 13 Nov 2020 08:16:32 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Lev Stipakov <lstipakov@...il.com>,
        Johannes Berg <johannes@...solutions.net>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Lev Stipakov <lev@...nvpn.net>
Subject: Re: [PATCH 1/3] net: mac80211: use core API for updating TX stats

Am 12.11.2020 um 12:09 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 ieee80211_tx_stats().
> 
I think you can do the same with ieee80211_rx_stats().

> Signed-off-by: Lev Stipakov <lev@...nvpn.net>
> ---
>  net/mac80211/tx.c | 16 +++-------------
>  1 file changed, 3 insertions(+), 13 deletions(-)
> 
> diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
> index 5f05f4651dd7..7807f8178527 100644
> --- a/net/mac80211/tx.c
> +++ b/net/mac80211/tx.c
> @@ -38,16 +38,6 @@
>  
>  /* misc utils */
>  
> -static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
> -{
> -	struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
> -
> -	u64_stats_update_begin(&tstats->syncp);
> -	tstats->tx_packets++;
> -	tstats->tx_bytes += len;
> -	u64_stats_update_end(&tstats->syncp);
> -}
> -
>  static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
>  				 struct sk_buff *skb, int group_addr,
>  				 int next_frag_len)
> @@ -3403,7 +3393,7 @@ static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
>  	if (key)
>  		info->control.hw_key = &key->conf;
>  
> -	ieee80211_tx_stats(skb->dev, skb->len);
> +	dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
>  
>  	if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
>  		tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
> @@ -4021,7 +4011,7 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb,
>  			goto out;
>  		}
>  
> -		ieee80211_tx_stats(dev, skb->len);
> +		dev_sw_netstats_tx_add(dev, 1, skb->len);
>  
>  		ieee80211_xmit(sdata, sta, skb);
>  	}
> @@ -4248,7 +4238,7 @@ static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
>  
>  	info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
>  
> -	ieee80211_tx_stats(dev, skb->len);
> +	dev_sw_netstats_tx_add(dev, 1, skb->len);
>  
>  	sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
>  	sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
>