ifb: convert to 64 bit stats

Convert input functional block device to use 64 bit stats.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 47 insertions, 9 deletions

diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index ce53f4a23b1..6e82dd32e80 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -41,8 +41,16 @@
 struct ifb_private {
         struct tasklet_struct   ifb_tasklet;
         int     tasklet_pending;
+
+        struct u64_stats_sync   rsync;
         struct sk_buff_head     rq;
+        u64 rx_packets;
+        u64 rx_bytes;
+
+        struct u64_stats_sync   tsync;
         struct sk_buff_head     tq;
+        u64 tx_packets;
+        u64 tx_bytes;
 };
 
 static int numifbs = 2;
@@ -54,10 +62,8 @@ static int ifb_close(struct net_device *dev);
 
 static void ri_tasklet(unsigned long dev)
 {
-
         struct net_device *_dev = (struct net_device *)dev;
         struct ifb_private *dp = netdev_priv(_dev);
-        struct net_device_stats *stats = &_dev->stats;
         struct netdev_queue *txq;
         struct sk_buff *skb;
 
@@ -77,15 +83,18 @@ static void ri_tasklet(unsigned long dev)
 
                 skb->tc_verd = 0;
                 skb->tc_verd = SET_TC_NCLS(skb->tc_verd);
-                stats->tx_packets++;
-                stats->tx_bytes +=skb->len;
+
+                u64_stats_update_begin(&dp->tsync);
+                dp->tx_packets++;
+                dp->tx_bytes += skb->len;
+                u64_stats_update_end(&dp->tsync);
 
                 rcu_read_lock();
                 skb->dev = dev_get_by_index_rcu(&init_net, skb->skb_iif);
                 if (!skb->dev) {
                         rcu_read_unlock();
                         dev_kfree_skb(skb);
-                        stats->tx_dropped++;
+                        _dev->stats.tx_dropped++;
                         if (skb_queue_len(&dp->tq) != 0)
                                 goto resched;
                         break;
@@ -120,9 +129,37 @@ resched:
 
 }
 
+static struct rtnl_link_stats64 *ifb_stats64(struct net_device *dev,
+                                             struct rtnl_link_stats64 *stats)
+{
+        struct ifb_private *dp = netdev_priv(dev);
+        unsigned int start;
+
+        do {
+                start = u64_stats_fetch_begin_bh(&dp->rsync);
+                stats->rx_packets = dp->rx_packets;
+                stats->rx_bytes = dp->rx_bytes;
+        } while (u64_stats_fetch_retry_bh(&dp->rsync, start));
+
+        do {
+                start = u64_stats_fetch_begin_bh(&dp->tsync);
+
+                stats->tx_packets = dp->tx_packets;
+                stats->tx_bytes = dp->tx_bytes;
+
+        } while (u64_stats_fetch_retry_bh(&dp->tsync, start));
+
+        stats->rx_dropped = dev->stats.rx_dropped;
+        stats->tx_dropped = dev->stats.tx_dropped;
+
+        return stats;
+}
+
+
 static const struct net_device_ops ifb_netdev_ops = {
         .ndo_open       = ifb_open,
         .ndo_stop       = ifb_close,
+        .ndo_get_stats64 = ifb_stats64,
         .ndo_start_xmit = ifb_xmit,
         .ndo_validate_addr = eth_validate_addr,
 };
@@ -153,15 +190,16 @@ static void ifb_setup(struct net_device *dev)
 static netdev_tx_t ifb_xmit(struct sk_buff *skb, struct net_device *dev)
 {
         struct ifb_private *dp = netdev_priv(dev);
-        struct net_device_stats *stats = &dev->stats;
         u32 from = G_TC_FROM(skb->tc_verd);
 
-        stats->rx_packets++;
-        stats->rx_bytes+=skb->len;
+        u64_stats_update_begin(&dp->rsync);
+        dp->rx_packets++;
+        dp->rx_bytes += skb->len;
+        u64_stats_update_end(&dp->rsync);
 
         if (!(from & (AT_INGRESS|AT_EGRESS)) || !skb->skb_iif) {
                 dev_kfree_skb(skb);
-                stats->rx_dropped++;
+                dev->stats.rx_dropped++;
                 return NETDEV_TX_OK;
         }