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authorEric Dumazet <eric.dumazet@gmail.com>2010-07-07 14:58:56 -0700
committerDavid S. Miller <davem@davemloft.net>2010-07-07 14:58:56 -0700
commit28172739f0a276eb8d6ca917b3974c2edb036da3 (patch)
treeb1dc00cfa20c209992e247c6f73601f609f9ca3b /net/bridge
parent217d32dc5f299c483ca0d3c8cc6811c72c0339c4 (diff)
downloadkernel-28172739f0a276eb8d6ca917b3974c2edb036da3.tar.gz
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/bridge')
-rw-r--r--net/bridge/br_device.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index edf639e96281..075c435ad22d 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -98,10 +98,10 @@ static int br_dev_stop(struct net_device *dev)
return 0;
}
-static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev)
+static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
{
struct net_bridge *br = netdev_priv(dev);
- struct rtnl_link_stats64 *stats = &dev->stats64;
struct br_cpu_netstats tmp, sum = { 0 };
unsigned int cpu;