net: dsa: Add support for 64-bit statistics

DSA slave network devices maintain a pair of bytes and packets counters
for each directions, but these are not 64-bit capable. Re-use
pcpu_sw_netstats which contains exactly what we need for that purpose
and update the code path to report 64-bit capable statistics.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index a55e2e4087a4..0ba842c08dd3 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -190,6 +190,7 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 {
         struct dsa_switch_tree *dst = dev->dsa_ptr;
         struct sk_buff *nskb = NULL;
+        struct dsa_slave_priv *p;
 
         if (unlikely(dst == NULL)) {
                 kfree_skb(skb);
@@ -207,12 +208,15 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
         }
 
         skb = nskb;
+        p = netdev_priv(skb->dev);
         skb_push(skb, ETH_HLEN);
         skb->pkt_type = PACKET_HOST;
         skb->protocol = eth_type_trans(skb, skb->dev);
 
-        skb->dev->stats.rx_packets++;
-        skb->dev->stats.rx_bytes += skb->len;
+        u64_stats_update_begin(&p->stats64.syncp);
+        p->stats64.rx_packets++;
+        p->stats64.rx_bytes += skb->len;
+        u64_stats_update_end(&p->stats64.syncp);
 
         netif_receive_skb(skb);