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Message-ID: <20110620144230.29421b05@nehalam.ftrdhcpuser.net>
Date: Mon, 20 Jun 2011 14:42:30 -0700
From: Stephen Hemminger <shemminger@...tta.com>
To: Eric Dumazet <eric.dumazet@...il.com>
Cc: David Miller <davem@...emloft.net>, jamal <hadi@...erus.ca>,
netdev@...r.kernel.org
Subject: [PATCH net-next 5/5] ifb: convert to 64 bit stats (v3)
Subject: ifb: convert to 64 bit stats
Convert input functional block device to use 64 bit stats.
Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
---
v3 - split tx/rsync
--- a/drivers/net/ifb.c 2011-06-20 13:38:54.271992329 -0700
+++ b/drivers/net/ifb.c 2011-06-20 14:40:52.295990246 -0700
@@ -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 *
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
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;
}
--
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