Release 4.11 net/core/netevent.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 <linux/export.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)
{
	return atomic_notifier_chain_register(&netevent_notif_chain, nb);
}
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EXPORT_SYMBOL_GPL(register_netevent_notifier);

/**
 *      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);
}
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EXPORT_SYMBOL_GPL(unregister_netevent_notifier);

/**
 *      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);
}
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EXPORT_SYMBOL_GPL(call_netevent_notifiers);
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Directory: net/core

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