| 1 | |
| 2 | |
| 3 | * Network event notifiers
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| 4 | *
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| 5 | * Authors:
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| 6 | * Tom Tucker <[email protected]>
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| 7 | * Steve Wise <[email protected]>
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| 8 | *
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| 9 | * Fixes:
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| 10 |
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| 11 |
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| 12 | #include <linux/rtnetlink.h>
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| 13 | #include <linux/notifier.h>
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| 14 | #include <linux/export.h>
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| 15 | #include <net/netevent.h>
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| 16 |
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| 17 | static ATOMIC_NOTIFIER_HEAD(netevent_notif_chain);
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| 18 |
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| 19 | |
| 20 | * register_netevent_notifier - register a netevent notifier block
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| 21 | * @nb: notifier
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| 22 | *
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| 23 | * Register a notifier to be called when a netevent occurs.
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| 24 | * The notifier passed is linked into the kernel structures and must
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| 25 | * not be reused until it has been unregistered. A negative errno code
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| 26 | * is returned on a failure.
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| 27 |
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| 28 | int register_netevent_notifier(struct notifier_block *nb)
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| 29 | {
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| 30 | return atomic_notifier_chain_register(&netevent_notif_chain, nb);
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| 31 | }
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| 32 | EXPORT_SYMBOL_GPL(register_netevent_notifier);
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| 33 |
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| 34 | |
| 35 | * unregister_netevent_notifier - unregister a netevent notifier block
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| 36 | * @nb: notifier
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| 37 | *
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| 38 | * Unregister a notifier previously registered by
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| 39 | * register_neigh_notifier(). The notifier is unlinked into the
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| 40 | * kernel structures and may then be reused. A negative errno code
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| 41 | * is returned on a failure.
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| 42 |
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| 43 |
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| 44 | int unregister_netevent_notifier(struct notifier_block *nb)
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| 45 | {
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| 46 | return atomic_notifier_chain_unregister(&netevent_notif_chain, nb);
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| 47 | }
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| 48 | EXPORT_SYMBOL_GPL(unregister_netevent_notifier);
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| 49 |
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| 50 | |
| 51 | * call_netevent_notifiers - call all netevent notifier blocks
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| 52 | * @val: value passed unmodified to notifier function
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| 53 | * @v: pointer passed unmodified to notifier function
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| 54 | *
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| 55 | * Call all neighbour notifier blocks. Parameters and return value
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| 56 | * are as for notifier_call_chain().
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| 57 |
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| 58 |
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| 59 | int call_netevent_notifiers(unsigned long val, void *v)
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| 60 | {
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| 61 | return atomic_notifier_call_chain(&netevent_notif_chain, val, v);
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| 62 | }
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| 63 | EXPORT_SYMBOL_GPL(call_netevent_notifiers);
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