1 /* Copyright (C) 2007-2016 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
21 #include "main.h"
22
23 #include <linux/compiler.h>
24 #include <linux/kref.h>
25 #include <linux/notifier.h>
26 #include <linux/rcupdate.h>
27 #include <linux/stddef.h>
28 #include <linux/types.h>
29
30 struct net_device;
31 struct net;
32
33 enum batadv_hard_if_state {
34 BATADV_IF_NOT_IN_USE,
35 BATADV_IF_TO_BE_REMOVED,
36 BATADV_IF_INACTIVE,
37 BATADV_IF_ACTIVE,
38 BATADV_IF_TO_BE_ACTIVATED,
39 BATADV_IF_I_WANT_YOU,
40 };
41
42 /**
43 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
44 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
45 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
46 */
47 enum batadv_hard_if_cleanup {
48 BATADV_IF_CLEANUP_KEEP,
49 BATADV_IF_CLEANUP_AUTO,
50 };
51
52 extern struct notifier_block batadv_hard_if_notifier;
53
54 bool batadv_is_wifi_netdev(struct net_device *net_device);
55 bool batadv_is_wifi_iface(int ifindex);
56 struct batadv_hard_iface*
57 batadv_hardif_get_by_netdev(const struct net_device *net_dev);
58 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
59 struct net *net, const char *iface_name);
60 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
61 enum batadv_hard_if_cleanup autodel);
62 void batadv_hardif_remove_interfaces(void);
63 int batadv_hardif_min_mtu(struct net_device *soft_iface);
64 void batadv_update_min_mtu(struct net_device *soft_iface);
65 void batadv_hardif_release(struct kref *ref);
66
67 /**
68 * batadv_hardif_put - decrement the hard interface refcounter and possibly
69 * release it
70 * @hard_iface: the hard interface to free
71 */
batadv_hardif_put(struct batadv_hard_iface * hard_iface)72 static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
73 {
74 kref_put(&hard_iface->refcount, batadv_hardif_release);
75 }
76
77 static inline struct batadv_hard_iface *
batadv_primary_if_get_selected(struct batadv_priv * bat_priv)78 batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
79 {
80 struct batadv_hard_iface *hard_iface;
81
82 rcu_read_lock();
83 hard_iface = rcu_dereference(bat_priv->primary_if);
84 if (!hard_iface)
85 goto out;
86
87 if (!kref_get_unless_zero(&hard_iface->refcount))
88 hard_iface = NULL;
89
90 out:
91 rcu_read_unlock();
92 return hard_iface;
93 }
94
95 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
96