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Sven Eckelmann9f6446c2015-04-23 13:16:35 +02001/* Copyright (C) 2007-2015 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
Antonio Quartulliebf38fb2013-11-03 20:40:48 +010015 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000016 */
17
18#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
19#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
20
Sven Eckelmann1e2c2a42015-04-17 19:40:28 +020021#include "main.h"
22
23#include <linux/atomic.h>
24#include <linux/compiler.h>
25#include <linux/notifier.h>
26#include <linux/rcupdate.h>
27#include <linux/stddef.h>
28#include <linux/types.h>
29
30struct net_device;
31
Sven Eckelmanne9a4f292012-06-03 22:19:19 +020032enum batadv_hard_if_state {
33 BATADV_IF_NOT_IN_USE,
34 BATADV_IF_TO_BE_REMOVED,
35 BATADV_IF_INACTIVE,
36 BATADV_IF_ACTIVE,
37 BATADV_IF_TO_BE_ACTIVATED,
38 BATADV_IF_I_WANT_YOU,
Sven Eckelmanne8958db2011-06-04 11:26:00 +020039};
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000040
Sven Eckelmanna15fd362013-02-11 17:10:24 +080041/**
42 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
43 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
44 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
45 */
46enum batadv_hard_if_cleanup {
47 BATADV_IF_CLEANUP_KEEP,
48 BATADV_IF_CLEANUP_AUTO,
49};
50
Sven Eckelmann95638772012-05-12 02:09:31 +020051extern struct notifier_block batadv_hard_if_notifier;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000052
Antonio Quartulli0c69aec2013-10-13 02:50:18 +020053bool batadv_is_wifi_netdev(struct net_device *net_device);
Simon Wunderlichc0398762013-11-13 19:14:48 +010054bool batadv_is_wifi_iface(int ifindex);
Sven Eckelmann56303d32012-06-05 22:31:31 +020055struct batadv_hard_iface*
Sven Eckelmann95638772012-05-12 02:09:31 +020056batadv_hardif_get_by_netdev(const struct net_device *net_dev);
Sven Eckelmann56303d32012-06-05 22:31:31 +020057int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
Sven Eckelmann95638772012-05-12 02:09:31 +020058 const char *iface_name);
Sven Eckelmanna15fd362013-02-11 17:10:24 +080059void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
60 enum batadv_hard_if_cleanup autodel);
Sven Eckelmann95638772012-05-12 02:09:31 +020061void batadv_hardif_remove_interfaces(void);
62int batadv_hardif_min_mtu(struct net_device *soft_iface);
63void batadv_update_min_mtu(struct net_device *soft_iface);
64void batadv_hardif_free_rcu(struct rcu_head *rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000065
Simon Wunderlich89652332013-11-13 19:14:46 +010066/**
67 * batadv_hardif_free_ref - decrement the hard interface refcounter and
68 * possibly free it
69 * @hard_iface: the hard interface to free
70 */
Sven Eckelmanne5d89252012-05-12 13:48:54 +020071static inline void
Sven Eckelmann56303d32012-06-05 22:31:31 +020072batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000073{
Marek Lindnere6c10f42011-02-18 12:33:20 +000074 if (atomic_dec_and_test(&hard_iface->refcount))
Sven Eckelmann95638772012-05-12 02:09:31 +020075 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000076}
77
Sven Eckelmann56303d32012-06-05 22:31:31 +020078static inline struct batadv_hard_iface *
79batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
Marek Lindner32ae9b22011-04-20 15:40:58 +020080{
Sven Eckelmann56303d32012-06-05 22:31:31 +020081 struct batadv_hard_iface *hard_iface;
Marek Lindner32ae9b22011-04-20 15:40:58 +020082
83 rcu_read_lock();
84 hard_iface = rcu_dereference(bat_priv->primary_if);
85 if (!hard_iface)
86 goto out;
87
88 if (!atomic_inc_not_zero(&hard_iface->refcount))
89 hard_iface = NULL;
90
91out:
92 rcu_read_unlock();
93 return hard_iface;
94}
95
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000096#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */