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63 lines
1.8 KiB
63 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Network event notifiers |
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* |
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* Authors: |
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* Tom Tucker <[email protected]> |
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* Steve Wise <[email protected]> |
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* |
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* Fixes: |
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*/ |
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#include <linux/rtnetlink.h> |
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#include <linux/notifier.h> |
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#include <linux/export.h> |
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#include <net/netevent.h> |
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static ATOMIC_NOTIFIER_HEAD(netevent_notif_chain); |
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/** |
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* register_netevent_notifier - register a netevent notifier block |
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* @nb: notifier |
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* |
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* Register a notifier to be called when a netevent occurs. |
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* The notifier passed is linked into the kernel structures and must |
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* not be reused until it has been unregistered. A negative errno code |
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* is returned on a failure. |
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*/ |
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int register_netevent_notifier(struct notifier_block *nb) |
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{ |
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return atomic_notifier_chain_register(&netevent_notif_chain, nb); |
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} |
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EXPORT_SYMBOL_GPL(register_netevent_notifier); |
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/** |
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* unregister_netevent_notifier - unregister a netevent notifier block |
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* @nb: notifier |
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* |
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* Unregister a notifier previously registered by |
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* register_neigh_notifier(). The notifier is unlinked into the |
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* kernel structures and may then be reused. A negative errno code |
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* is returned on a failure. |
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*/ |
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int unregister_netevent_notifier(struct notifier_block *nb) |
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{ |
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return atomic_notifier_chain_unregister(&netevent_notif_chain, nb); |
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} |
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EXPORT_SYMBOL_GPL(unregister_netevent_notifier); |
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/** |
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* call_netevent_notifiers - call all netevent notifier blocks |
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* @val: value passed unmodified to notifier function |
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* @v: pointer passed unmodified to notifier function |
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* |
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* Call all neighbour notifier blocks. Parameters and return value |
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* are as for notifier_call_chain(). |
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*/ |
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int call_netevent_notifiers(unsigned long val, void *v) |
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{ |
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return atomic_notifier_call_chain(&netevent_notif_chain, val, v); |
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} |
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EXPORT_SYMBOL_GPL(call_netevent_notifiers);
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