71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/*
|
|
* Network event notifiers
|
|
*
|
|
* Authors:
|
|
* Tom Tucker <tom@opengridcomputing.com>
|
|
* Steve Wise <swise@opengridcomputing.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* Fixes:
|
|
*/
|
|
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/notifier.h>
|
|
#include <net/netevent.h>
|
|
|
|
static ATOMIC_NOTIFIER_HEAD(netevent_notif_chain);
|
|
|
|
/**
|
|
* register_netevent_notifier - register a netevent notifier block
|
|
* @nb: notifier
|
|
*
|
|
* Register a notifier to be called when a netevent occurs.
|
|
* The notifier passed is linked into the kernel structures and must
|
|
* not be reused until it has been unregistered. A negative errno code
|
|
* is returned on a failure.
|
|
*/
|
|
int register_netevent_notifier(struct notifier_block *nb)
|
|
{
|
|
int err;
|
|
|
|
err = atomic_notifier_chain_register(&netevent_notif_chain, nb);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* netevent_unregister_notifier - unregister a netevent notifier block
|
|
* @nb: notifier
|
|
*
|
|
* Unregister a notifier previously registered by
|
|
* register_neigh_notifier(). The notifier is unlinked into the
|
|
* kernel structures and may then be reused. A negative errno code
|
|
* is returned on a failure.
|
|
*/
|
|
|
|
int unregister_netevent_notifier(struct notifier_block *nb)
|
|
{
|
|
return atomic_notifier_chain_unregister(&netevent_notif_chain, nb);
|
|
}
|
|
|
|
/**
|
|
* call_netevent_notifiers - call all netevent notifier blocks
|
|
* @val: value passed unmodified to notifier function
|
|
* @v: pointer passed unmodified to notifier function
|
|
*
|
|
* Call all neighbour notifier blocks. Parameters and return value
|
|
* are as for notifier_call_chain().
|
|
*/
|
|
|
|
int call_netevent_notifiers(unsigned long val, void *v)
|
|
{
|
|
return atomic_notifier_call_chain(&netevent_notif_chain, val, v);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(register_netevent_notifier);
|
|
EXPORT_SYMBOL_GPL(unregister_netevent_notifier);
|
|
EXPORT_SYMBOL_GPL(call_netevent_notifiers);
|