[PATCH net-next] geneve: use DEV_STATS_INC()

[PATCH net-next] geneve: use DEV_STATS_INC()

[Eric Dumazet]

geneve updates dev->stats fields locklessly.

Adopt DEV_STATS_INC() to avoid races.

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 drivers/net/geneve.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index acd9c615d1f4f78cce348dbd42541de241ca8180..32c51c244153bd760b9f58001906c04c8b0f37ff 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -234,7 +234,7 @@ static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
 					 vni_to_tunnel_id(gnvh->vni),
 					 gnvh->opt_len * 4);
 		if (!tun_dst) {
-			geneve->dev->stats.rx_dropped++;
+			DEV_STATS_INC(geneve->dev, rx_dropped);
 			goto drop;
 		}
 		/* Update tunnel dst according to Geneve options. */
@@ -246,8 +246,8 @@ static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
 		 * since we don't support any...
 		 */
 		if (gnvh->critical) {
-			geneve->dev->stats.rx_frame_errors++;
-			geneve->dev->stats.rx_errors++;
+			DEV_STATS_INC(geneve->dev, rx_frame_errors);
+			DEV_STATS_INC(geneve->dev, rx_errors);
 			goto drop;
 		}
 	}
@@ -263,7 +263,7 @@ static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
 		/* Ignore packet loops (and multicast echo) */
 		if (ether_addr_equal(eth_hdr(skb)->h_source,
 				     geneve->dev->dev_addr)) {
-			geneve->dev->stats.rx_errors++;
+			DEV_STATS_INC(geneve->dev, rx_errors);
 			goto drop;
 		}
 	} else {
@@ -296,8 +296,8 @@ static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
 #endif
 		}
 		if (err > 1) {
-			++geneve->dev->stats.rx_frame_errors;
-			++geneve->dev->stats.rx_errors;
+			DEV_STATS_INC(geneve->dev, rx_frame_errors);
+			DEV_STATS_INC(geneve->dev, rx_errors);
 			goto drop;
 		}
 	}
@@ -377,14 +377,14 @@ static int geneve_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
 
 	if (unlikely((!geneve->cfg.inner_proto_inherit &&
 		      inner_proto != htons(ETH_P_TEB)))) {
-		geneve->dev->stats.rx_dropped++;
+		DEV_STATS_INC(geneve->dev, rx_dropped);
 		goto drop;
 	}
 
 	opts_len = geneveh->opt_len * 4;
 	if (iptunnel_pull_header(skb, GENEVE_BASE_HLEN + opts_len, inner_proto,
 				 !net_eq(geneve->net, dev_net(geneve->dev)))) {
-		geneve->dev->stats.rx_dropped++;
+		DEV_STATS_INC(geneve->dev, rx_dropped);
 		goto drop;
 	}
 
@@ -1007,7 +1007,7 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
 		if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) {
 			netdev_dbg(dev, "no tunnel metadata\n");
 			dev_kfree_skb(skb);
-			dev->stats.tx_dropped++;
+			DEV_STATS_INC(dev, tx_dropped);
 			return NETDEV_TX_OK;
 		}
 	} else {
@@ -1030,11 +1030,11 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev)
 		dev_kfree_skb(skb);
 
 	if (err == -ELOOP)
-		dev->stats.collisions++;
+		DEV_STATS_INC(dev, collisions);
 	else if (err == -ENETUNREACH)
-		dev->stats.tx_carrier_errors++;
+		DEV_STATS_INC(dev, tx_carrier_errors);
 
-	dev->stats.tx_errors++;
+	DEV_STATS_INC(dev, tx_errors);
 	return NETDEV_TX_OK;
 }
 
-- 
2.43.0.472.g3155946c3a-goog

Re: [PATCH net-next] geneve: use DEV_STATS_INC()

[Simon Horman]

On Thu, Jan 04, 2024 at 04:36:33PM +0000, Eric Dumazet wrote:
> geneve updates dev->stats fields locklessly.
> 
> Adopt DEV_STATS_INC() to avoid races.
> 
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Reviewed-by: Simon Horman <horms@kernel.org>

Re: [PATCH net-next] geneve: use DEV_STATS_INC()

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Thu,  4 Jan 2024 16:36:33 +0000 you wrote:
> geneve updates dev->stats fields locklessly.
> 
> Adopt DEV_STATS_INC() to avoid races.
> 
> Signed-off-by: Eric Dumazet <edumazet@google.com>
> ---
>  drivers/net/geneve.c | 24 ++++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)

Here is the summary with links:
  - [net-next] geneve: use DEV_STATS_INC()
    https://git.kernel.org/netdev/net-next/c/c72a657b5cca

You are awesome, thank you!
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