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netdev: Create netdev_queue abstraction.

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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>
This commit is contained in:
David S. Miller
2008-07-08 16:55:56 -07:00
parent e65d22e180
commit bb949fbd18
14 changed files with 74 additions and 29 deletions
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14
net/sched/sch_generic.c
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@@ -440,7 +440,9 @@ static struct Qdisc_ops pfifo_fast_ops __read_mostly = {
.owner = THIS_MODULE,
};
struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops)
struct Qdisc *qdisc_alloc(struct net_device *dev,
struct netdev_queue *dev_queue,
struct Qdisc_ops *ops)
{
void *p;
struct Qdisc *sch;
@@ -462,6 +464,7 @@ struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops)
sch->ops = ops;
sch->enqueue = ops->enqueue;
sch->dequeue = ops->dequeue;
sch->dev_queue = dev_queue;
sch->dev = dev;
dev_hold(dev);
atomic_set(&sch->refcnt, 1);
@@ -471,12 +474,14 @@ errout:
return ERR_PTR(err);
}
struct Qdisc * qdisc_create_dflt(struct net_device *dev, struct Qdisc_ops *ops,
struct Qdisc * qdisc_create_dflt(struct net_device *dev,
struct netdev_queue *dev_queue,
struct Qdisc_ops *ops,
unsigned int parentid)
{
struct Qdisc *sch;
sch = qdisc_alloc(dev, ops);
sch = qdisc_alloc(dev, dev_queue, ops);
if (IS_ERR(sch))
goto errout;
sch->stats_lock = &dev->queue_lock;
@@ -545,7 +550,8 @@ void dev_activate(struct net_device *dev)
if (dev->qdisc_sleeping == &noop_qdisc) {
struct Qdisc *qdisc;
if (dev->tx_queue_len) {
qdisc = qdisc_create_dflt(dev, &pfifo_fast_ops,
qdisc = qdisc_create_dflt(dev, &dev->tx_queue,
&pfifo_fast_ops,
TC_H_ROOT);
if (qdisc == NULL) {
printk(KERN_INFO "%s: activation failed\n", dev->name);