1 /*
2 * Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner, Simon Wunderlich
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA
19 *
20 */
21
22 #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
23 #define _NET_BATMAN_ADV_HARD_INTERFACE_H_
24
25 enum hard_if_state {
26 IF_NOT_IN_USE,
27 IF_TO_BE_REMOVED,
28 IF_INACTIVE,
29 IF_ACTIVE,
30 IF_TO_BE_ACTIVATED,
31 IF_I_WANT_YOU
32 };
33
34 extern struct notifier_block hard_if_notifier;
35
36 struct hard_iface*
37 hardif_get_by_netdev(const struct net_device *net_dev);
38 int hardif_enable_interface(struct hard_iface *hard_iface,
39 const char *iface_name);
40 void hardif_disable_interface(struct hard_iface *hard_iface);
41 void hardif_remove_interfaces(void);
42 int hardif_min_mtu(struct net_device *soft_iface);
43 void update_min_mtu(struct net_device *soft_iface);
44 void hardif_free_rcu(struct rcu_head *rcu);
45 bool is_wifi_iface(int ifindex);
46
hardif_free_ref(struct hard_iface * hard_iface)47 static inline void hardif_free_ref(struct hard_iface *hard_iface)
48 {
49 if (atomic_dec_and_test(&hard_iface->refcount))
50 call_rcu(&hard_iface->rcu, hardif_free_rcu);
51 }
52
primary_if_get_selected(struct bat_priv * bat_priv)53 static inline struct hard_iface *primary_if_get_selected(
54 struct bat_priv *bat_priv)
55 {
56 struct hard_iface *hard_iface;
57
58 rcu_read_lock();
59 hard_iface = rcu_dereference(bat_priv->primary_if);
60 if (!hard_iface)
61 goto out;
62
63 if (!atomic_inc_not_zero(&hard_iface->refcount))
64 hard_iface = NULL;
65
66 out:
67 rcu_read_unlock();
68 return hard_iface;
69 }
70
71 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
72