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21f42cc9 SK |
1 | /* |
2 | * xfrm_device.c - IPsec device offloading code. | |
3 | * | |
4 | * Copyright (c) 2015 secunet Security Networks AG | |
5 | * | |
6 | * Author: | |
7 | * Steffen Klassert <steffen.klassert@secunet.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | */ | |
14 | ||
15 | #include <linux/errno.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/spinlock.h> | |
21 | #include <net/dst.h> | |
22 | #include <net/xfrm.h> | |
23 | #include <linux/notifier.h> | |
24 | ||
25 | static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
26 | { | |
27 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
28 | ||
29 | switch (event) { | |
30 | case NETDEV_DOWN: | |
31 | xfrm_garbage_collect(dev_net(dev)); | |
32 | } | |
33 | return NOTIFY_DONE; | |
34 | } | |
35 | ||
36 | static struct notifier_block xfrm_dev_notifier = { | |
37 | .notifier_call = xfrm_dev_event, | |
38 | }; | |
39 | ||
40 | void __net_init xfrm_dev_init(void) | |
41 | { | |
42 | register_netdevice_notifier(&xfrm_dev_notifier); | |
43 | } |