1 /* Copyright (C) 2007-2015 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/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
30 struct net_device;
31
32 enum 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,
39 };
40
41 /**
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 */
46 enum batadv_hard_if_cleanup {
47 BATADV_IF_CLEANUP_KEEP,
48 BATADV_IF_CLEANUP_AUTO,
49 };
50
51 extern struct notifier_block batadv_hard_if_notifier;
52
53 bool batadv_is_wifi_netdev(struct net_device *net_device);
54 bool batadv_is_wifi_iface(int ifindex);
55 struct batadv_hard_iface*
56 batadv_hardif_get_by_netdev(const struct net_device *net_dev);
57 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
58 const char *iface_name);
59 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
60 enum batadv_hard_if_cleanup autodel);
61 void batadv_hardif_remove_interfaces(void);
62 int batadv_hardif_min_mtu(struct net_device *soft_iface);
63 void batadv_update_min_mtu(struct net_device *soft_iface);
64 void batadv_hardif_release(struct batadv_hard_iface *hard_iface);
65
66 /**
67 * batadv_hardif_free_ref - decrement the hard interface refcounter and
68 * possibly release it
69 * @hard_iface: the hard interface to free
70 */
71 static inline void
batadv_hardif_free_ref(struct batadv_hard_iface * hard_iface)72 batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
73 {
74 if (atomic_dec_and_test(&hard_iface->refcount))
75 batadv_hardif_release(hard_iface);
76 }
77
78 static inline struct batadv_hard_iface *
batadv_primary_if_get_selected(struct batadv_priv * bat_priv)79 batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
80 {
81 struct batadv_hard_iface *hard_iface;
82
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
91 out:
92 rcu_read_unlock();
93 return hard_iface;
94 }
95
96 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
97