1 /* Copyright (C) 2007-2013 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, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA
18 */
19
20 #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
21 #define _NET_BATMAN_ADV_HARD_INTERFACE_H_
22
23 enum 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,
30 };
31
32 /**
33 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
34 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
35 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
36 */
37 enum batadv_hard_if_cleanup {
38 BATADV_IF_CLEANUP_KEEP,
39 BATADV_IF_CLEANUP_AUTO,
40 };
41
42 extern struct notifier_block batadv_hard_if_notifier;
43
44 struct batadv_hard_iface*
45 batadv_hardif_get_by_netdev(const struct net_device *net_dev);
46 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
47 const char *iface_name);
48 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
49 enum batadv_hard_if_cleanup autodel);
50 void batadv_hardif_remove_interfaces(void);
51 int batadv_hardif_min_mtu(struct net_device *soft_iface);
52 void batadv_update_min_mtu(struct net_device *soft_iface);
53 void batadv_hardif_free_rcu(struct rcu_head *rcu);
54 bool batadv_is_wifi_iface(int ifindex);
55
56 static inline void
batadv_hardif_free_ref(struct batadv_hard_iface * hard_iface)57 batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
58 {
59 if (atomic_dec_and_test(&hard_iface->refcount))
60 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
61 }
62
63 static inline struct batadv_hard_iface *
batadv_primary_if_get_selected(struct batadv_priv * bat_priv)64 batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
65 {
66 struct batadv_hard_iface *hard_iface;
67
68 rcu_read_lock();
69 hard_iface = rcu_dereference(bat_priv->primary_if);
70 if (!hard_iface)
71 goto out;
72
73 if (!atomic_inc_not_zero(&hard_iface->refcount))
74 hard_iface = NULL;
75
76 out:
77 rcu_read_unlock();
78 return hard_iface;
79 }
80
81 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
82