net: remove dev_txq_stats_fold()
After recent changes, (percpu stats on vlan/tunnels...), we dont need
anymore per struct netdev_queue tx_bytes/tx_packets/tx_dropped counters.
Only remaining users are ixgbe, sch_teql, gianfar & macvlan :
1) ixgbe can be converted to use existing tx_ring counters.
2) macvlan incremented txq->tx_dropped, it can use the
dev->stats.tx_dropped counter.
3) sch_teql : almost revert ab35cd4b8f42 (Use net_device internal stats)
Now we have ndo_get_stats64(), use it, even for "unsigned long"
fields (No need to bring back a struct net_device_stats)
4) gianfar adds a stats structure per tx queue to hold
tx_bytes/tx_packets
This removes a lockdep warning (and possible lockup) in rndis gadget,
calling dev_get_stats() from hard IRQ context.
Ref: http://www.spinics.net/lists/netdev/msg149202.html
Reported-by: Neil Jones <neiljay@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Jarek Poplawski <jarkao2@gmail.com>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
CC: Sandeep Gopalpet <sandeep.kumar@freescale.com>
CC: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index af9360d..84ce48e 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -59,6 +59,10 @@
struct net_device *dev;
struct Qdisc *slaves;
struct list_head master_list;
+ unsigned long tx_bytes;
+ unsigned long tx_packets;
+ unsigned long tx_errors;
+ unsigned long tx_dropped;
};
struct teql_sched_data
@@ -274,7 +278,6 @@
static netdev_tx_t teql_master_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct teql_master *master = netdev_priv(dev);
- struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
struct Qdisc *start, *q;
int busy;
int nores;
@@ -314,8 +317,8 @@
__netif_tx_unlock(slave_txq);
master->slaves = NEXT_SLAVE(q);
netif_wake_queue(dev);
- txq->tx_packets++;
- txq->tx_bytes += length;
+ master->tx_packets++;
+ master->tx_bytes += length;
return NETDEV_TX_OK;
}
__netif_tx_unlock(slave_txq);
@@ -342,10 +345,10 @@
netif_stop_queue(dev);
return NETDEV_TX_BUSY;
}
- dev->stats.tx_errors++;
+ master->tx_errors++;
drop:
- txq->tx_dropped++;
+ master->tx_dropped++;
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
@@ -398,6 +401,18 @@
return 0;
}
+static struct rtnl_link_stats64 *teql_master_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct teql_master *m = netdev_priv(dev);
+
+ stats->tx_packets = m->tx_packets;
+ stats->tx_bytes = m->tx_bytes;
+ stats->tx_errors = m->tx_errors;
+ stats->tx_dropped = m->tx_dropped;
+ return stats;
+}
+
static int teql_master_mtu(struct net_device *dev, int new_mtu)
{
struct teql_master *m = netdev_priv(dev);
@@ -422,6 +437,7 @@
.ndo_open = teql_master_open,
.ndo_stop = teql_master_close,
.ndo_start_xmit = teql_master_xmit,
+ .ndo_get_stats64 = teql_master_stats64,
.ndo_change_mtu = teql_master_mtu,
};