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net: Introduce unregister_netdevice_queue()

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This patchs adds an unreg_list anchor to struct net_device, and
introduces an unregister_netdevice_queue() function, able to queue
a net_device to a list instead of immediately unregister it.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2009-10-27 07:03:04 +00:00
committed by David S. Miller
parent 83ab50a56e
commit 44a0873d52
2 changed files with 21 additions and 8 deletions
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20
net/core/dev.c
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@@ -5245,25 +5245,31 @@ void synchronize_net(void)
EXPORT_SYMBOL(synchronize_net);
/**
* unregister_netdevice - remove device from the kernel
* unregister_netdevice_queue - remove device from the kernel
* @dev: device
*
* @head: list
* This function shuts down a device interface and removes it
* from the kernel tables.
* If head not NULL, device is queued to be unregistered later.
*
* Callers must hold the rtnl semaphore. You may want
* unregister_netdev() instead of this.
*/
void unregister_netdevice(struct net_device *dev)
void unregister_netdevice_queue(struct net_device *dev, struct list_head *head)
{
ASSERT_RTNL();
rollback_registered(dev);
/* Finish processing unregister after unlock */
net_set_todo(dev);
if (head) {
list_add_tail(&dev->unreg_list, head);
} else {
rollback_registered(dev);
/* Finish processing unregister after unlock */
net_set_todo(dev);
}
}
EXPORT_SYMBOL(unregister_netdevice);
EXPORT_SYMBOL(unregister_netdevice_queue);
/**
* unregister_netdev - remove device from the kernel