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authorEric Dumazet <eric.dumazet@gmail.com>2010-07-07 23:58:56 +0200
committerDavid S. Miller <davem@davemloft.net>2010-07-07 23:58:56 +0200
commit28172739f0a276eb8d6ca917b3974c2edb036da3 (patch)
treeb1dc00cfa20c209992e247c6f73601f609f9ca3b /net/8021q/vlan_dev.c
parentforcedeth: correct valid flag (diff)
downloadlinux-28172739f0a276eb8d6ca917b3974c2edb036da3.tar.xz
linux-28172739f0a276eb8d6ca917b3974c2edb036da3.zip
net: fix 64 bit counters on 32 bit arches
There is a small possibility that a reader gets incorrect values on 32 bit arches. SNMP applications could catch incorrect counters when a 32bit high part is changed by another stats consumer/provider. One way to solve this is to add a rtnl_link_stats64 param to all ndo_get_stats64() methods, and also add such a parameter to dev_get_stats(). Rule is that we are not allowed to use dev->stats64 as a temporary storage for 64bit stats, but a caller provided area (usually on stack) Old drivers (only providing get_stats() method) need no changes. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan_dev.c')
-rw-r--r--net/8021q/vlan_dev.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index c6456cb842fa..7865a4ce5250 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -803,11 +803,9 @@ static u32 vlan_ethtool_get_flags(struct net_device *dev)
return dev_ethtool_get_flags(vlan->real_dev);
}
-static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev)
+static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
- struct rtnl_link_stats64 *stats = &dev->stats64;
-
- dev_txq_stats_fold(dev, &dev->stats);
+ dev_txq_stats_fold(dev, (struct net_device_stats *)stats);
if (vlan_dev_info(dev)->vlan_rx_stats) {
struct vlan_rx_stats *p, accum = {0};