1/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
2 *
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, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
19#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
20
21enum batadv_hard_if_state {
22	BATADV_IF_NOT_IN_USE,
23	BATADV_IF_TO_BE_REMOVED,
24	BATADV_IF_INACTIVE,
25	BATADV_IF_ACTIVE,
26	BATADV_IF_TO_BE_ACTIVATED,
27	BATADV_IF_I_WANT_YOU,
28};
29
30/**
31 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
32 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
33 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
34 */
35enum batadv_hard_if_cleanup {
36	BATADV_IF_CLEANUP_KEEP,
37	BATADV_IF_CLEANUP_AUTO,
38};
39
40extern struct notifier_block batadv_hard_if_notifier;
41
42bool batadv_is_wifi_netdev(struct net_device *net_device);
43bool batadv_is_wifi_iface(int ifindex);
44struct batadv_hard_iface*
45batadv_hardif_get_by_netdev(const struct net_device *net_dev);
46int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
47				   const char *iface_name);
48void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
49				     enum batadv_hard_if_cleanup autodel);
50void batadv_hardif_remove_interfaces(void);
51int batadv_hardif_min_mtu(struct net_device *soft_iface);
52void batadv_update_min_mtu(struct net_device *soft_iface);
53void batadv_hardif_free_rcu(struct rcu_head *rcu);
54
55/**
56 * batadv_hardif_free_ref - decrement the hard interface refcounter and
57 *  possibly free it
58 * @hard_iface: the hard interface to free
59 */
60static inline void
61batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
62{
63	if (atomic_dec_and_test(&hard_iface->refcount))
64		call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
65}
66
67static inline struct batadv_hard_iface *
68batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
69{
70	struct batadv_hard_iface *hard_iface;
71
72	rcu_read_lock();
73	hard_iface = rcu_dereference(bat_priv->primary_if);
74	if (!hard_iface)
75		goto out;
76
77	if (!atomic_inc_not_zero(&hard_iface->refcount))
78		hard_iface = NULL;
79
80out:
81	rcu_read_unlock();
82	return hard_iface;
83}
84
85#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
86