Correct .gbs.conf settings
[platform/adaptation/renesas_rcar/renesas_kernel.git] / net / batman-adv / hard-interface.h
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
21 enum 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  */
35 enum batadv_hard_if_cleanup {
36         BATADV_IF_CLEANUP_KEEP,
37         BATADV_IF_CLEANUP_AUTO,
38 };
39
40 extern struct notifier_block batadv_hard_if_notifier;
41
42 bool batadv_is_wifi_netdev(struct net_device *net_device);
43 bool batadv_is_wifi_iface(int ifindex);
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
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  */
60 static inline void
61 batadv_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
67 /**
68  * batadv_hardif_free_ref_now - decrement the hard interface refcounter and
69  *  possibly free it (without rcu callback)
70  * @hard_iface: the hard interface to free
71  */
72 static inline void
73 batadv_hardif_free_ref_now(struct batadv_hard_iface *hard_iface)
74 {
75         if (atomic_dec_and_test(&hard_iface->refcount))
76                 batadv_hardif_free_rcu(&hard_iface->rcu);
77 }
78
79 static inline struct batadv_hard_iface *
80 batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
81 {
82         struct batadv_hard_iface *hard_iface;
83
84         rcu_read_lock();
85         hard_iface = rcu_dereference(bat_priv->primary_if);
86         if (!hard_iface)
87                 goto out;
88
89         if (!atomic_inc_not_zero(&hard_iface->refcount))
90                 hard_iface = NULL;
91
92 out:
93         rcu_read_unlock();
94         return hard_iface;
95 }
96
97 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */