macvlan: 64 bit rx counters

Use u64_stats_sync infrastructure to implement 64bit stats.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 7 deletions

diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h
index c26a0e4..e24ce6e 100644
--- a/include/linux/if_macvlan.h
+++ b/include/linux/if_macvlan.h
@@ -6,6 +6,7 @@
 #include <linux/netdevice.h>
 #include <linux/netlink.h>
 #include <net/netlink.h>
+#include <linux/u64_stats_sync.h>
 
 #if defined(CONFIG_MACVTAP) || defined(CONFIG_MACVTAP_MODULE)
 struct socket *macvtap_get_socket(struct file *);
@@ -27,14 +28,16 @@ struct macvtap_queue;
  *	struct macvlan_rx_stats - MACVLAN percpu rx stats
  *	@rx_packets: number of received packets
  *	@rx_bytes: number of received bytes
- *	@multicast: number of received multicast packets
+ *	@rx_multicast: number of received multicast packets
+ *	@syncp: synchronization point for 64bit counters
  *	@rx_errors: number of errors
  */
 struct macvlan_rx_stats {
-	unsigned long rx_packets;
-	unsigned long rx_bytes;
-	unsigned long multicast;
-	unsigned long rx_errors;
+	u64			rx_packets;
+	u64			rx_bytes;
+	u64			rx_multicast;
+	struct u64_stats_sync	syncp;
+	unsigned long		rx_errors;
 };
 
 struct macvlan_dev {
@@ -56,12 +59,14 @@ static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
 {
 	struct macvlan_rx_stats *rx_stats;
 
-	rx_stats = per_cpu_ptr(vlan->rx_stats, smp_processor_id());
+	rx_stats = this_cpu_ptr(vlan->rx_stats);
 	if (likely(success)) {
+		u64_stats_update_begin(&rx_stats->syncp);
 		rx_stats->rx_packets++;;
 		rx_stats->rx_bytes += len;
 		if (multicast)
-			rx_stats->multicast++;
+			rx_stats->rx_multicast++;
+		u64_stats_update_end(&rx_stats->syncp);
 	} else {
 		rx_stats->rx_errors++;
 	}