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Message-ID: <1277376906.2816.287.camel@edumazet-laptop>
Date: Thu, 24 Jun 2010 12:55:06 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: David Miller <davem@...emloft.net>
Cc: Patrick McHardy <kaber@...sh.net>, netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6 4/4] vlan: 64 bit rx counters
Use u64_stats_sync infrastructure to implement 64bit rx stats.
(tx stats are addressed later)
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
net/8021q/vlan.h | 13 ++++++-----
net/8021q/vlan_core.c | 7 +++---
net/8021q/vlan_dev.c | 46 +++++++++++++++++++++++++---------------
3 files changed, 41 insertions(+), 25 deletions(-)
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 6abdcac..8d9503a 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -2,6 +2,7 @@
#define __BEN_VLAN_802_1Q_INC__
#include <linux/if_vlan.h>
+#include <linux/u64_stats_sync.h>
/**
@@ -21,14 +22,16 @@ struct vlan_priority_tci_mapping {
* struct vlan_rx_stats - VLAN 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 vlan_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;
};
/**
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 50f58f5..1b9406a 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -41,9 +41,9 @@ int vlan_hwaccel_do_receive(struct sk_buff *skb)
skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
skb->vlan_tci = 0;
- rx_stats = per_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats,
- smp_processor_id());
+ rx_stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats);
+ u64_stats_update_begin(&rx_stats->syncp);
rx_stats->rx_packets++;
rx_stats->rx_bytes += skb->len;
@@ -51,7 +51,7 @@ int vlan_hwaccel_do_receive(struct sk_buff *skb)
case PACKET_BROADCAST:
break;
case PACKET_MULTICAST:
- rx_stats->multicast++;
+ rx_stats->rx_multicast++;
break;
case PACKET_OTHERHOST:
/* Our lower layer thinks this is not local, let's make sure.
@@ -62,6 +62,7 @@ int vlan_hwaccel_do_receive(struct sk_buff *skb)
skb->pkt_type = PACKET_HOST;
break;
}
+ u64_stats_update_end(&rx_stats->syncp);
return 0;
}
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 5298426..c6456cb 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -166,6 +166,7 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
rx_stats = per_cpu_ptr(vlan_dev_info(skb->dev)->vlan_rx_stats,
smp_processor_id());
+ u64_stats_update_begin(&rx_stats->syncp);
rx_stats->rx_packets++;
rx_stats->rx_bytes += skb->len;
@@ -182,7 +183,7 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
break;
case PACKET_MULTICAST:
- rx_stats->multicast++;
+ rx_stats->rx_multicast++;
break;
case PACKET_OTHERHOST:
@@ -197,6 +198,7 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
default:
break;
}
+ u64_stats_update_end(&rx_stats->syncp);
vlan_set_encap_proto(skb, vhdr);
@@ -801,27 +803,37 @@ static u32 vlan_ethtool_get_flags(struct net_device *dev)
return dev_ethtool_get_flags(vlan->real_dev);
}
-static struct net_device_stats *vlan_dev_get_stats(struct net_device *dev)
+static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev)
{
- struct net_device_stats *stats = &dev->stats;
+ struct rtnl_link_stats64 *stats = &dev->stats64;
- dev_txq_stats_fold(dev, stats);
+ dev_txq_stats_fold(dev, &dev->stats);
if (vlan_dev_info(dev)->vlan_rx_stats) {
- struct vlan_rx_stats *p, rx = {0};
+ struct vlan_rx_stats *p, accum = {0};
int i;
for_each_possible_cpu(i) {
+ u64 rxpackets, rxbytes, rxmulticast;
+ unsigned int start;
+
p = per_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats, i);
- rx.rx_packets += p->rx_packets;
- rx.rx_bytes += p->rx_bytes;
- rx.rx_errors += p->rx_errors;
- rx.multicast += p->multicast;
+ do {
+ start = u64_stats_fetch_begin_bh(&p->syncp);
+ rxpackets = p->rx_packets;
+ rxbytes = p->rx_bytes;
+ rxmulticast = p->rx_multicast;
+ } while (u64_stats_fetch_retry_bh(&p->syncp, start));
+ accum.rx_packets += rxpackets;
+ accum.rx_bytes += rxbytes;
+ accum.rx_multicast += rxmulticast;
+ /* rx_errors is an ulong, not protected by syncp */
+ accum.rx_errors += p->rx_errors;
}
- stats->rx_packets = rx.rx_packets;
- stats->rx_bytes = rx.rx_bytes;
- stats->rx_errors = rx.rx_errors;
- stats->multicast = rx.multicast;
+ stats->rx_packets = accum.rx_packets;
+ stats->rx_bytes = accum.rx_bytes;
+ stats->rx_errors = accum.rx_errors;
+ stats->multicast = accum.rx_multicast;
}
return stats;
}
@@ -848,7 +860,7 @@ static const struct net_device_ops vlan_netdev_ops = {
.ndo_change_rx_flags = vlan_dev_change_rx_flags,
.ndo_do_ioctl = vlan_dev_ioctl,
.ndo_neigh_setup = vlan_dev_neigh_setup,
- .ndo_get_stats = vlan_dev_get_stats,
+ .ndo_get_stats64 = vlan_dev_get_stats64,
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
.ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
.ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
@@ -872,7 +884,7 @@ static const struct net_device_ops vlan_netdev_accel_ops = {
.ndo_change_rx_flags = vlan_dev_change_rx_flags,
.ndo_do_ioctl = vlan_dev_ioctl,
.ndo_neigh_setup = vlan_dev_neigh_setup,
- .ndo_get_stats = vlan_dev_get_stats,
+ .ndo_get_stats64 = vlan_dev_get_stats64,
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
.ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
.ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
@@ -897,7 +909,7 @@ static const struct net_device_ops vlan_netdev_ops_sq = {
.ndo_change_rx_flags = vlan_dev_change_rx_flags,
.ndo_do_ioctl = vlan_dev_ioctl,
.ndo_neigh_setup = vlan_dev_neigh_setup,
- .ndo_get_stats = vlan_dev_get_stats,
+ .ndo_get_stats64 = vlan_dev_get_stats64,
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
.ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
.ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
@@ -922,7 +934,7 @@ static const struct net_device_ops vlan_netdev_accel_ops_sq = {
.ndo_change_rx_flags = vlan_dev_change_rx_flags,
.ndo_do_ioctl = vlan_dev_ioctl,
.ndo_neigh_setup = vlan_dev_neigh_setup,
- .ndo_get_stats = vlan_dev_get_stats,
+ .ndo_get_stats64 = vlan_dev_get_stats64,
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
.ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup,
.ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done,
--
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