batman-adv: split tq information in neigh_node struct
[firefly-linux-kernel-4.4.55.git] / net / batman-adv / hard-interface.h
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, 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 struct batadv_hard_iface*
44 batadv_hardif_get_by_netdev(const struct net_device *net_dev);
45 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
46                                    const char *iface_name);
47 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
48                                      enum batadv_hard_if_cleanup autodel);
49 void batadv_hardif_remove_interfaces(void);
50 int batadv_hardif_min_mtu(struct net_device *soft_iface);
51 void batadv_update_min_mtu(struct net_device *soft_iface);
52 void batadv_hardif_free_rcu(struct rcu_head *rcu);
53
54 /**
55  * batadv_hardif_free_ref - decrement the hard interface refcounter and
56  *  possibly free it
57  * @hard_iface: the hard interface to free
58  */
59 static inline void
60 batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
61 {
62         if (atomic_dec_and_test(&hard_iface->refcount))
63                 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
64 }
65
66 /**
67  * batadv_hardif_free_ref_now - decrement the hard interface refcounter and
68  *  possibly free it (without rcu callback)
69  * @hard_iface: the hard interface to free
70  */
71 static inline void
72 batadv_hardif_free_ref_now(struct batadv_hard_iface *hard_iface)
73 {
74         if (atomic_dec_and_test(&hard_iface->refcount))
75                 batadv_hardif_free_rcu(&hard_iface->rcu);
76 }
77
78 static inline struct batadv_hard_iface *
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_ */