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>
diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c
index df56f5c..80e280f 100644
--- a/net/8021q/vlanproc.c
+++ b/net/8021q/vlanproc.c
@@ -278,6 +278,7 @@
{
struct net_device *vlandev = (struct net_device *) seq->private;
const struct vlan_dev_info *dev_info = vlan_dev_info(vlandev);
+ struct rtnl_link_stats64 temp;
const struct rtnl_link_stats64 *stats;
static const char fmt[] = "%30s %12lu\n";
static const char fmt64[] = "%30s %12llu\n";
@@ -286,7 +287,7 @@
if (!is_vlan_dev(vlandev))
return 0;
- stats = dev_get_stats(vlandev);
+ stats = dev_get_stats(vlandev, &temp);
seq_printf(seq,
"%s VID: %d REORDER_HDR: %i dev->priv_flags: %hx\n",
vlandev->name, dev_info->vlan_id,