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

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Date:   Thu, 17 Oct 2019 14:28:32 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, ilias.apalodimas@...aro.org,
        lorenzo.bianconi@...hat.com
Subject: [PATCH v2 net-next] net: socionext: netsec: fix xdp stats accounting

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