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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-07-07 14:58:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-07 14:58:56 -0700 |
| commit | 28172739f0a276eb8d6ca917b3974c2edb036da3 (patch) | |
| tree | b1dc00cfa20c209992e247c6f73601f609f9ca3b /drivers/net/loopback.c | |
| parent | 217d32dc5f299c483ca0d3c8cc6811c72c0339c4 (diff) | |
| download | linux-28172739f0a276eb8d6ca917b3974c2edb036da3.tar.gz linux-28172739f0a276eb8d6ca917b3974c2edb036da3.tar.bz2 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 'drivers/net/loopback.c')
| -rw-r--r-- | drivers/net/loopback.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 4dd0510d7a99..9a0996795321 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -98,10 +98,10 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb, return NETDEV_TX_OK; } -static struct rtnl_link_stats64 *loopback_get_stats64(struct net_device *dev) +static struct rtnl_link_stats64 *loopback_get_stats64(struct net_device *dev, + struct rtnl_link_stats64 *stats) { const struct pcpu_lstats __percpu *pcpu_lstats; - struct rtnl_link_stats64 *stats = &dev->stats64; u64 bytes = 0; u64 packets = 0; u64 drops = 0; |