netpoll: call ->ndo_select_queue() in tx path

In netpoll tx path, we miss the chance of calling ->ndo_select_queue(),
thus could cause problems when bonding is involved.

This patch makes dev_pick_tx() extern (and rename it to netdev_pick_tx())
to let netpoll call it in netpoll_send_skb_on_dev().

Reported-by: Sylvain Munaut <s.munaut@whatever-company.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Tested-by: Sylvain Munaut <s.munaut@whatever-company.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 82264e7..6c131f0 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1403,6 +1403,9 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev,
                f(dev, &dev->_tx[i], arg);
 }
 
+extern struct netdev_queue *netdev_pick_tx(struct net_device *dev,
+                                          struct sk_buff *skb);
+
 /*
  * Net namespace inlines
  */

diff --git a/net/core/dev.c b/net/core/dev.c
index bbda819..707b124 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2396,8 +2396,8 @@ static inline int get_xps_queue(struct net_device *dev, struct sk_buff *skb)
 #endif
 }
 
-static struct netdev_queue *dev_pick_tx(struct net_device *dev,
-                                       struct sk_buff *skb)
+struct netdev_queue *netdev_pick_tx(struct net_device *dev,
+                                   struct sk_buff *skb)
 {
        int queue_index;
        const struct net_device_ops *ops = dev->netdev_ops;
@@ -2571,7 +2571,7 @@ int dev_queue_xmit(struct sk_buff *skb)
 
        skb_update_prio(skb);
 
-       txq = dev_pick_tx(dev, skb);
+       txq = netdev_pick_tx(dev, skb);
        q = rcu_dereference_bh(txq->qdisc);
 
 #ifdef CONFIG_NET_CLS_ACT

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index dd67818..77a0388 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -328,7 +328,7 @@ void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
        if (skb_queue_len(&npinfo->txq) == 0 && !netpoll_owner_active(dev)) {
                struct netdev_queue *txq;
 
-               txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+               txq = netdev_pick_tx(dev, skb);
 
                /* try until next clock tick */
                for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;