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, 7 insertions, 5 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 69e918bb4278..b86c98bd06a3 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -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)