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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364// SPDX-License-Identifier: GPL-2.0-or-later/* * Network event notifiers * * Authors: * Tom Tucker <tom@opengridcomputing.com> * Steve Wise <swise@opengridcomputing.com> * * 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);}EXPORT_SYMBOL_GPL(register_netevent_notifier);
/** * unregister_netevent_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);}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);}EXPORT_SYMBOL_GPL(call_netevent_notifiers);