netdev: Allocate multiple queues for TX.

alloc_netdev_mq() now allocates an array of netdev_queue
structures for TX, based upon the queue_count argument.

Furthermore, all accesses to the TX queues are now vectored
through the netdev_get_tx_queue() and netdev_for_each_tx_queue()
interfaces.  This makes it easy to grep the tree for all
things that want to get to a TX queue of a net device.

Problem spots which are not really multiqueue aware yet, and
only work with one queue, can easily be spotted by grepping
for all netdev_get_tx_queue() calls that pass in a zero index.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 7 deletions

diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c
index 8ac05981be2..44a2c3451f4 100644
--- a/net/sched/sch_teql.c
+++ b/net/sched/sch_teql.c
@@ -111,7 +111,7 @@ teql_dequeue(struct Qdisc* sch)
         struct sk_buff *skb;
 
         skb = __skb_dequeue(&dat->q);
-        dat_queue = &dat->m->dev->tx_queue;
+        dat_queue = netdev_get_tx_queue(dat->m->dev, 0);
         if (skb == NULL) {
                 struct net_device *m = qdisc_dev(dat_queue->qdisc);
                 if (m) {
@@ -155,10 +155,13 @@ teql_destroy(struct Qdisc* sch)
                                 if (q == master->slaves) {
                                         master->slaves = NEXT_SLAVE(q);
                                         if (q == master->slaves) {
+                                                struct netdev_queue *txq;
+
+                                                txq = netdev_get_tx_queue(master->dev, 0);
                                                 master->slaves = NULL;
-                                                spin_lock_bh(&master->dev->tx_queue.lock);
-                                                qdisc_reset(master->dev->tx_queue.qdisc);
-                                                spin_unlock_bh(&master->dev->tx_queue.lock);
+                                                spin_lock_bh(&txq->lock);
+                                                qdisc_reset(txq->qdisc);
+                                                spin_unlock_bh(&txq->lock);
                                         }
                                 }
                                 skb_queue_purge(&dat->q);
@@ -218,7 +221,8 @@ static int teql_qdisc_init(struct Qdisc *sch, struct nlattr *opt)
 static int
 __teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *dev)
 {
-        struct teql_sched_data *q = qdisc_priv(dev->tx_queue.qdisc);
+        struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, 0);
+        struct teql_sched_data *q = qdisc_priv(dev_queue->qdisc);
         struct neighbour *mn = skb->dst->neighbour;
         struct neighbour *n = q->ncache;
 
@@ -254,7 +258,8 @@ __teql_resolve(struct sk_buff *skb, struct sk_buff *skb_res, struct net_device *
 static inline int teql_resolve(struct sk_buff *skb,
                                struct sk_buff *skb_res, struct net_device *dev)
 {
-        if (dev->tx_queue.qdisc == &noop_qdisc)
+        struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
+        if (txq->qdisc == &noop_qdisc)
                 return -ENODEV;
 
         if (dev->header_ops == NULL ||
@@ -285,8 +290,10 @@ restart:
 
         do {
                 struct net_device *slave = qdisc_dev(q);
+                struct netdev_queue *slave_txq;
 
-                if (slave->tx_queue.qdisc_sleeping != q)
+                slave_txq = netdev_get_tx_queue(slave, 0);
+                if (slave_txq->qdisc_sleeping != q)
                         continue;
                 if (netif_queue_stopped(slave) ||
                     __netif_subqueue_stopped(slave, subq) ||