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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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12
net/sched/sch_api.c
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@ -552,8 +552,8 @@ static int qdisc_graft(struct net_device *dev, struct Qdisc *parent,
*/
static struct Qdisc *
qdisc_create(struct net_device *dev, u32 parent, u32 handle,
struct nlattr **tca, int *errp)
qdisc_create(struct net_device *dev, struct netdev_queue *dev_queue,
u32 parent, u32 handle, struct nlattr **tca, int *errp)
{
int err;
struct nlattr *kind = tca[TCA_KIND];
@ -593,7 +593,7 @@ qdisc_create(struct net_device *dev, u32 parent, u32 handle,
if (ops == NULL)
goto err_out;
sch = qdisc_alloc(dev, ops);
sch = qdisc_alloc(dev, dev_queue, ops);
if (IS_ERR(sch)) {
err = PTR_ERR(sch);
goto err_out2;
@ -892,10 +892,12 @@ create_n_graft:
if (!(n->nlmsg_flags&NLM_F_CREATE))
return -ENOENT;
if (clid == TC_H_INGRESS)
q = qdisc_create(dev, tcm->tcm_parent, tcm->tcm_parent,
q = qdisc_create(dev, &dev->rx_queue,
tcm->tcm_parent, tcm->tcm_parent,
tca, &err);
else
q = qdisc_create(dev, tcm->tcm_parent, tcm->tcm_handle,
q = qdisc_create(dev, &dev->tx_queue,
tcm->tcm_parent, tcm->tcm_handle,
tca, &err);
if (q == NULL) {
if (err == -EAGAIN)