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Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001/*
Sven Eckelmann64afe352011-01-27 10:38:15 +01002 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00003 *
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
Sven Eckelmanne8958db2011-06-04 11:26:00 +020025enum 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};
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000033
34extern struct notifier_block hard_if_notifier;
35
Sven Eckelmann747e4222011-05-14 23:14:50 +020036struct hard_iface*
37hardif_get_by_netdev(const struct net_device *net_dev);
38int hardif_enable_interface(struct hard_iface *hard_iface,
39 const char *iface_name);
Marek Lindnere6c10f42011-02-18 12:33:20 +000040void hardif_disable_interface(struct hard_iface *hard_iface);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000041void hardif_remove_interfaces(void);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000042int hardif_min_mtu(struct net_device *soft_iface);
43void update_min_mtu(struct net_device *soft_iface);
Marek Lindnered75ccb2011-02-10 14:33:51 +000044void hardif_free_rcu(struct rcu_head *rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000045
Marek Lindnere6c10f42011-02-18 12:33:20 +000046static inline void hardif_free_ref(struct hard_iface *hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000047{
Marek Lindnere6c10f42011-02-18 12:33:20 +000048 if (atomic_dec_and_test(&hard_iface->refcount))
49 call_rcu(&hard_iface->rcu, hardif_free_rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000050}
51
Marek Lindner32ae9b22011-04-20 15:40:58 +020052static inline struct hard_iface *primary_if_get_selected(
53 struct bat_priv *bat_priv)
54{
55 struct hard_iface *hard_iface;
56
57 rcu_read_lock();
58 hard_iface = rcu_dereference(bat_priv->primary_if);
59 if (!hard_iface)
60 goto out;
61
62 if (!atomic_inc_not_zero(&hard_iface->refcount))
63 hard_iface = NULL;
64
65out:
66 rcu_read_unlock();
67 return hard_iface;
68}
69
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000070#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */