netdev: Create netdev_queue abstraction.

A netdev_queue is an entity managed by a qdisc.

Currently there is one RX and one TX queue, and a netdev_queue merely
contains a backpointer to the net_device.

The Qdisc struct is augmented with a netdev_queue pointer as well.

Eventually the 'dev' Qdisc member will go away and we will have the
resulting hierarchy:

	net_device --> netdev_queue --> Qdisc

Also, qdisc_alloc() and qdisc_create_dflt() now take a netdev_queue
pointer argument.

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

1 files changed, 6 insertions, 3 deletions

diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 968b4c73c9c1..d360dcd0818b 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1401,7 +1401,8 @@ static int cbq_init(struct Qdisc *sch, struct nlattr *opt)
         q->link.sibling = &q->link;
         q->link.common.classid = sch->handle;
         q->link.qdisc = sch;
-        if (!(q->link.q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops,
+        if (!(q->link.q = qdisc_create_dflt(sch->dev, sch->dev_queue,
+                                            &pfifo_qdisc_ops,
                                             sch->handle)))
                 q->link.q = &noop_qdisc;
 
@@ -1645,7 +1646,8 @@ static int cbq_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
 
         if (cl) {
                 if (new == NULL) {
-                        new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops,
+                        new = qdisc_create_dflt(sch->dev, sch->dev_queue,
+                                                &pfifo_qdisc_ops,
                                                 cl->common.classid);
                         if (new == NULL)
                                 return -ENOBUFS;
@@ -1877,7 +1879,8 @@ cbq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, struct nlattr **t
         cl->R_tab = rtab;
         rtab = NULL;
         cl->refcnt = 1;
-        if (!(cl->q = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, classid)))
+        if (!(cl->q = qdisc_create_dflt(sch->dev, sch->dev_queue,
+                                        &pfifo_qdisc_ops, classid)))
                 cl->q = &noop_qdisc;
         cl->common.classid = classid;
         cl->tparent = parent;