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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 /arch/s390/appldata
parent217d32dc5f299c483ca0d3c8cc6811c72c0339c4 (diff)
downloadlinux-linaro-android-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 'arch/s390/appldata')
-rw-r--r--arch/s390/appldata/appldata_net_sum.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index 9a9586f4103..f02e89ce4df 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -85,7 +85,8 @@ static void appldata_get_net_sum_data(void *data)
rcu_read_lock();
for_each_netdev_rcu(&init_net, dev) {
- const struct net_device_stats *stats = dev_get_stats(dev);
+ struct rtnl_link_stats64 temp;
+ const struct net_device_stats *stats = dev_get_stats(dev, &temp);
rx_packets += stats->rx_packets;
tx_packets += stats->tx_packets;