netdev - Re: [PATCH v2 net-next] net: socionext: netsec: fix xdp stats accounting

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Message-ID: <20191017123030.GA21206@apalos.home>
Date:   Thu, 17 Oct 2019 15:30:30 +0300
From:   Ilias Apalodimas <ilias.apalodimas@...aro.org>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        lorenzo.bianconi@...hat.com
Subject: Re: [PATCH v2 net-next] net: socionext: netsec: fix xdp stats
 accounting

Thanks Lorenzo,

On Thu, Oct 17, 2019 at 02:28:32PM +0200, Lorenzo Bianconi wrote:
> Increment netdev rx counters even for XDP_DROP verdict. Report even
> tx bytes for xdp buffers (TYPE_NETSEC_XDP_TX or TYPE_NETSEC_XDP_NDO).
> Moreover account pending buffer length in netsec_xdp_queue_one as it is
> done for skb counterpart
> 
> Tested-by: Ilias Apalodimas <ilias.apalodimas@...aro.org>
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
> ---
> Changes since v1:
> - fix BQL accounting
> - target the patch to next-next
> ---
>  drivers/net/ethernet/socionext/netsec.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
> index f9e6744d8fd6..c40294470bfa 100644
> --- a/drivers/net/ethernet/socionext/netsec.c
> +++ b/drivers/net/ethernet/socionext/netsec.c
> @@ -252,7 +252,6 @@
>  #define NETSEC_XDP_CONSUMED      BIT(0)
>  #define NETSEC_XDP_TX            BIT(1)
>  #define NETSEC_XDP_REDIR         BIT(2)
> -#define NETSEC_XDP_RX_OK (NETSEC_XDP_PASS | NETSEC_XDP_TX | NETSEC_XDP_REDIR)
>  
>  enum ring_id {
>  	NETSEC_RING_TX = 0,
> @@ -661,6 +660,7 @@ static bool netsec_clean_tx_dring(struct netsec_priv *priv)
>  			bytes += desc->skb->len;
>  			dev_kfree_skb(desc->skb);
>  		} else {
> +			bytes += desc->xdpf->len;
>  			xdp_return_frame(desc->xdpf);
>  		}
>  next:
> @@ -858,6 +858,7 @@ static u32 netsec_xdp_queue_one(struct netsec_priv *priv,
>  	tx_desc.addr = xdpf->data;
>  	tx_desc.len = xdpf->len;
>  
> +	netdev_sent_queue(priv->ndev, xdpf->len);
>  	netsec_set_tx_de(priv, tx_ring, &tx_ctrl, &tx_desc, xdpf);
>  
>  	return NETSEC_XDP_TX;
> @@ -1030,7 +1031,7 @@ static int netsec_process_rx(struct netsec_priv *priv, int budget)
>  
>  next:
>  		if ((skb && napi_gro_receive(&priv->napi, skb) != GRO_DROP) ||
> -		    xdp_result & NETSEC_XDP_RX_OK) {
> +		    xdp_result) {
>  			ndev->stats.rx_packets++;
>  			ndev->stats.rx_bytes += xdp.data_end - xdp.data;
>  		}
> -- 
> 2.21.0
> 

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@...aro.org>