netdev: Kill qdisc_ingress, use netdev->rx_queue.qdisc instead.

Now that our qdisc management is bi-directional, per-queue, and fully
orthogonal, there is no reason to have a special ingress qdisc pointer
in struct net_device.

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

include/linux/netdevice.h

@@ -634,9 +634,6 @@ struct net_device
 
 	struct netdev_queue	rx_queue;
 	struct netdev_queue	tx_queue ____cacheline_aligned_in_smp;
-
-	struct Qdisc		*qdisc_ingress;
-
 	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
 
 	/* Partially transmitted GSO packet. */

net/core/dev.c

@@ -2033,7 +2033,7 @@ static int ing_filter(struct sk_buff *skb)
 	rxq = &dev->rx_queue;
 
 	spin_lock(&rxq->lock);
-	if ((q = dev->qdisc_ingress) != NULL)
+	if ((q = rxq->qdisc) != NULL)
 		result = q->enqueue(skb, q);
 	spin_unlock(&rxq->lock);
 
@@ -2044,7 +2044,7 @@ static inline struct sk_buff *handle_ing(struct sk_buff *skb,
 					 struct packet_type **pt_prev,
 					 int *ret, struct net_device *orig_dev)
 {
-	if (!skb->dev->qdisc_ingress)
+	if (!skb->dev->rx_queue.qdisc)
 		goto out;
 
 	if (*pt_prev) {

net/sched/sch_api.c

@@ -450,14 +450,15 @@ dev_graft_qdisc(struct net_device *dev, struct Qdisc *qdisc)
 
 	qdisc_lock_tree(dev);
 	if (qdisc && qdisc->flags&TCQ_F_INGRESS) {
-		oqdisc = dev->qdisc_ingress;
+		dev_queue = &dev->rx_queue;
+		oqdisc = dev_queue->qdisc;
 		/* Prune old scheduler */
 		if (oqdisc && atomic_read(&oqdisc->refcnt) <= 1) {
 			/* delete */
 			qdisc_reset(oqdisc);
-			dev->qdisc_ingress = NULL;
+			dev_queue->qdisc = NULL;
 		} else {  /* new */
-			dev->qdisc_ingress = qdisc;
+			dev_queue->qdisc = qdisc;
 		}
 
 	} else {
@@ -739,7 +740,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 					return -ENOENT;
 				q = qdisc_leaf(p, clid);
 			} else { /* ingress */
-				q = dev->qdisc_ingress;
+				q = dev->rx_queue.qdisc;
 			}
 		} else {
 			struct netdev_queue *dev_queue = &dev->tx_queue;
@@ -814,7 +815,7 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 					return -ENOENT;
 				q = qdisc_leaf(p, clid);
 			} else { /*ingress */
-				q = dev->qdisc_ingress;
+				q = dev->rx_queue.qdisc;
 			}
 		} else {
 			struct netdev_queue *dev_queue = &dev->tx_queue;