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net: dsa: Add support for 64-bit statistics

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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>
This commit is contained in:
Florian Fainelli 2017-08-01 15:00:36 -07:00 • committed by David S. Miller
parent b2f9d432de
commit f613ed665b
3 changed files with 38 additions and 8 deletions
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8
net/dsa/dsa.c
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@ -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);