121f42cc9SSteffen Klassert /* 221f42cc9SSteffen Klassert * xfrm_device.c - IPsec device offloading code. 321f42cc9SSteffen Klassert * 421f42cc9SSteffen Klassert * Copyright (c) 2015 secunet Security Networks AG 521f42cc9SSteffen Klassert * 621f42cc9SSteffen Klassert * Author: 721f42cc9SSteffen Klassert * Steffen Klassert <steffen.klassert@secunet.com> 821f42cc9SSteffen Klassert * 921f42cc9SSteffen Klassert * This program is free software; you can redistribute it and/or 1021f42cc9SSteffen Klassert * modify it under the terms of the GNU General Public License 1121f42cc9SSteffen Klassert * as published by the Free Software Foundation; either version 1221f42cc9SSteffen Klassert * 2 of the License, or (at your option) any later version. 1321f42cc9SSteffen Klassert */ 1421f42cc9SSteffen Klassert 1521f42cc9SSteffen Klassert #include <linux/errno.h> 1621f42cc9SSteffen Klassert #include <linux/module.h> 1721f42cc9SSteffen Klassert #include <linux/netdevice.h> 1821f42cc9SSteffen Klassert #include <linux/skbuff.h> 1921f42cc9SSteffen Klassert #include <linux/slab.h> 2021f42cc9SSteffen Klassert #include <linux/spinlock.h> 2121f42cc9SSteffen Klassert #include <net/dst.h> 2221f42cc9SSteffen Klassert #include <net/xfrm.h> 2321f42cc9SSteffen Klassert #include <linux/notifier.h> 2421f42cc9SSteffen Klassert 2521f42cc9SSteffen Klassert static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void *ptr) 2621f42cc9SSteffen Klassert { 2721f42cc9SSteffen Klassert struct net_device *dev = netdev_notifier_info_to_dev(ptr); 2821f42cc9SSteffen Klassert 2921f42cc9SSteffen Klassert switch (event) { 3021f42cc9SSteffen Klassert case NETDEV_DOWN: 3121f42cc9SSteffen Klassert xfrm_garbage_collect(dev_net(dev)); 3221f42cc9SSteffen Klassert } 3321f42cc9SSteffen Klassert return NOTIFY_DONE; 3421f42cc9SSteffen Klassert } 3521f42cc9SSteffen Klassert 3621f42cc9SSteffen Klassert static struct notifier_block xfrm_dev_notifier = { 3721f42cc9SSteffen Klassert .notifier_call = xfrm_dev_event, 3821f42cc9SSteffen Klassert }; 3921f42cc9SSteffen Klassert 4021f42cc9SSteffen Klassert void __net_init xfrm_dev_init(void) 4121f42cc9SSteffen Klassert { 4221f42cc9SSteffen Klassert register_netdevice_notifier(&xfrm_dev_notifier); 4321f42cc9SSteffen Klassert } 44