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Antonio Quartulli0b873932013-01-04 03:05:31 +01001/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00002 *
3 * Marek Lindner, Simon Wunderlich
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000018 */
19
20#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
21#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
22
Sven Eckelmanne9a4f292012-06-03 22:19:19 +020023enum batadv_hard_if_state {
24 BATADV_IF_NOT_IN_USE,
25 BATADV_IF_TO_BE_REMOVED,
26 BATADV_IF_INACTIVE,
27 BATADV_IF_ACTIVE,
28 BATADV_IF_TO_BE_ACTIVATED,
29 BATADV_IF_I_WANT_YOU,
Sven Eckelmanne8958db2011-06-04 11:26:00 +020030};
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000031
Sven Eckelmann95638772012-05-12 02:09:31 +020032extern struct notifier_block batadv_hard_if_notifier;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000033
Sven Eckelmann56303d32012-06-05 22:31:31 +020034struct batadv_hard_iface*
Sven Eckelmann95638772012-05-12 02:09:31 +020035batadv_hardif_get_by_netdev(const struct net_device *net_dev);
Sven Eckelmann56303d32012-06-05 22:31:31 +020036int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
Sven Eckelmann95638772012-05-12 02:09:31 +020037 const char *iface_name);
Sven Eckelmann56303d32012-06-05 22:31:31 +020038void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface);
Sven Eckelmann95638772012-05-12 02:09:31 +020039void batadv_hardif_remove_interfaces(void);
40int batadv_hardif_min_mtu(struct net_device *soft_iface);
41void batadv_update_min_mtu(struct net_device *soft_iface);
42void batadv_hardif_free_rcu(struct rcu_head *rcu);
43bool batadv_is_wifi_iface(int ifindex);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000044
Sven Eckelmanne5d89252012-05-12 13:48:54 +020045static inline void
Sven Eckelmann56303d32012-06-05 22:31:31 +020046batadv_hardif_free_ref(struct batadv_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))
Sven Eckelmann95638772012-05-12 02:09:31 +020049 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000050}
51
Sven Eckelmann56303d32012-06-05 22:31:31 +020052static inline struct batadv_hard_iface *
53batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
Marek Lindner32ae9b22011-04-20 15:40:58 +020054{
Sven Eckelmann56303d32012-06-05 22:31:31 +020055 struct batadv_hard_iface *hard_iface;
Marek Lindner32ae9b22011-04-20 15:40:58 +020056
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_ */