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netdev: network device operations infrastructure

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This patch changes the network device internal API to move adminstrative
operations out of the network device structure and into a separate structure.

This patch involves some hackery to maintain compatablity between the
new and old model, so all 300+ drivers don't have to be changed at once.
For drivers that aren't converted yet, the netdevice_ops virt function list
still resides in the net_device structure. For old protocols, the new
net_device_ops are copied out to the old net_device pointers.

After the transistion is completed the nag message can be changed to
an WARN_ON, and the compatiablity code can be made configurable.

Some function pointers aren't moved:
* destructor can't be in net_device_ops because
  it may need to be referenced after the module is unloaded.
* neighbor setup is manipulated in a couple of places that need special
  consideration
* hard_start_xmit is in the fast path for transmit.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2008-11-19 21:32:24 -08:00
committed by David S. Miller
parent 6b41e7dd90
commit d314774cf2
6 changed files with 259 additions and 105 deletions
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7
net/core/netpoll.c
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@@ -172,12 +172,13 @@ static void service_arp_queue(struct netpoll_info *npi)
void netpoll_poll(struct netpoll *np)
{
struct net_device *dev = np->dev;
const struct net_device_ops *ops = dev->netdev_ops;
if (!dev || !netif_running(dev) || !dev->poll_controller)
if (!dev || !netif_running(dev) || !ops->ndo_poll_controller)
return;
/* Process pending work on NIC */
dev->poll_controller(dev);
ops->ndo_poll_controller(dev);
poll_napi(dev);
@@ -694,7 +695,7 @@ int netpoll_setup(struct netpoll *np)
atomic_inc(&npinfo->refcnt);
}
if (!ndev->poll_controller) {
if (!ndev->netdev_ops->ndo_poll_controller) {
printk(KERN_ERR "%s: %s doesn't support polling, aborting.\n",
np->name, np->dev_name);
err = -ENOTSUPP;