net: add skb_get_tx_queue() helper

Replace occurences of skb_get_queue_mapping() and follow-up
netdev_get_tx_queue() with an actual helper function.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 4298013..dfc1d8b 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1747,6 +1747,12 @@ struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
        return &dev->_tx[index];
 }
 
+static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
+                                                   const struct sk_buff *skb)
+{
+       return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+}
+
 static inline void netdev_for_each_tx_queue(struct net_device *dev,
                                            void (*f)(struct net_device *,
                                                      struct netdev_queue *,

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index a5ad068..12b1df9 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -115,7 +115,7 @@ static void queue_process(struct work_struct *work)
                        continue;
                }
 
-               txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+               txq = skb_get_tx_queue(dev, skb);
 
                local_irq_save(flags);
                HARD_TX_LOCK(dev, txq, smp_processor_id());

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 83e2b4b..d81b540 100644 (file)
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3286,7 +3286,6 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
 {
        struct net_device *odev = pkt_dev->odev;
        struct netdev_queue *txq;
-       u16 queue_map;
        int ret;
 
        /* If device is offline, then don't send */
@@ -3324,8 +3323,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
        if (pkt_dev->delay && pkt_dev->last_ok)
                spin(pkt_dev, pkt_dev->next_tx);
 
-       queue_map = skb_get_queue_mapping(pkt_dev->skb);
-       txq = netdev_get_tx_queue(odev, queue_map);
+       txq = skb_get_tx_queue(odev, pkt_dev->skb);
 
        local_bh_disable();
 

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 0dfa990..b7a7f5a 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -243,7 +243,6 @@ static int packet_direct_xmit(struct sk_buff *skb)
        netdev_features_t features;
        struct netdev_queue *txq;
        int ret = NETDEV_TX_BUSY;
-       u16 queue_map;
 
        if (unlikely(!netif_running(dev) ||
                     !netif_carrier_ok(dev)))
@@ -254,8 +253,7 @@ static int packet_direct_xmit(struct sk_buff *skb)
            __skb_linearize(skb))
                goto drop;
 
-       queue_map = skb_get_queue_mapping(skb);
-       txq = netdev_get_tx_queue(dev, queue_map);
+       txq = skb_get_tx_queue(dev, skb);
 
        local_bh_disable();
 

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index fc04fe9..05b3f5d 100644 (file)
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -63,7 +63,7 @@ static inline struct sk_buff *dequeue_skb(struct Qdisc *q)
 
        if (unlikely(skb)) {
                /* check the reason of requeuing without tx lock first */
-               txq = netdev_get_tx_queue(txq->dev, skb_get_queue_mapping(skb));
+               txq = skb_get_tx_queue(txq->dev, skb);
                if (!netif_xmit_frozen_or_stopped(txq)) {
                        q->gso_skb = NULL;
                        q->q.qlen--;
@@ -183,10 +183,12 @@ static inline int qdisc_restart(struct Qdisc *q)
        skb = dequeue_skb(q);
        if (unlikely(!skb))
                return 0;
+
        WARN_ON_ONCE(skb_dst_is_noref(skb));
+
        root_lock = qdisc_lock(q);
        dev = qdisc_dev(q);
-       txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+       txq = skb_get_tx_queue(dev, skb);
 
        return sch_direct_xmit(skb, q, dev, txq, root_lock);
 }