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net_sched: make dev_trans_start return vlan's real dev trans_start 

Vlan devices are LLTX and don't update their own trans_start, so if
dev_trans_start has to be called with a vlan device then 0 or a stale
value will be returned. Currently the bonding is the only such user, and
it's needed for proper arp monitoring when the slaves are vlans.
Fix this by extracting the vlan's real device trans_start.

Suggested-by: David Miller <davem@davemloft.net>
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Acked-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
nikolay@redhat.com 2013-08-03 22:07:47 +02:00 committed by David S. Miller
parent 0369722f02
commit 07ce76aa9b
1 changed files with 6 additions and 1 deletions
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7
net/sched/sch_generic.c
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@ -25,6 +25,7 @@
#include <linux/rcupdate.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/if_vlan.h>
#include <net/sch_generic.h>
#include <net/pkt_sched.h>
#include <net/dst.h>
@ -207,15 +208,19 @@ void __qdisc_run(struct Qdisc *q)
unsigned long dev_trans_start(struct net_device *dev)
{
unsigned long val, res = dev->trans_start;
unsigned long val, res;
unsigned int i;
if (is_vlan_dev(dev))
dev = vlan_dev_real_dev(dev);
res = dev->trans_start;
for (i = 0; i < dev->num_tx_queues; i++) {
val = netdev_get_tx_queue(dev, i)->trans_start;
if (val && time_after(val, res))
res = val;
}
dev->trans_start = res;
return res;
}
EXPORT_SYMBOL(dev_trans_start);