1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner, Simon Wunderlich
5 */
6
7#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
8#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
9
10#include "main.h"
11
12#include <linux/compiler.h>
13#include <linux/kref.h>
14#include <linux/netdevice.h>
15#include <linux/rcupdate.h>
16#include <linux/stddef.h>
17#include <linux/types.h>
18
19/**
20 * enum batadv_hard_if_state - State of a hard interface
21 */
22enum batadv_hard_if_state {
23 /**
24 * @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a
25 * batman-adv mesh interface
26 */
27 BATADV_IF_NOT_IN_USE,
28
29 /**
30 * @BATADV_IF_TO_BE_REMOVED: interface will be removed from mesh
31 * interface
32 */
33 BATADV_IF_TO_BE_REMOVED,
34
35 /** @BATADV_IF_INACTIVE: interface is deactivated */
36 BATADV_IF_INACTIVE,
37
38 /** @BATADV_IF_ACTIVE: interface is used */
39 BATADV_IF_ACTIVE,
40
41 /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */
42 BATADV_IF_TO_BE_ACTIVATED,
43};
44
45/**
46 * enum batadv_hard_if_bcast - broadcast avoidance options
47 */
48enum batadv_hard_if_bcast {
49 /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */
50 BATADV_HARDIF_BCAST_OK = 0,
51
52 /**
53 * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no
54 * recipient
55 */
56 BATADV_HARDIF_BCAST_NORECIPIENT,
57
58 /**
59 * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it
60 * from
61 */
62 BATADV_HARDIF_BCAST_DUPFWD,
63
64 /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */
65 BATADV_HARDIF_BCAST_DUPORIG,
66};
67
68extern struct notifier_block batadv_hard_if_notifier;
69
70struct net_device *batadv_get_real_netdev(struct net_device *net_device);
71bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface);
72bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface);
73struct batadv_hard_iface*
74batadv_hardif_get_by_netdev(const struct net_device *net_dev);
75int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
76 struct net_device *mesh_iface);
77void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface);
78int batadv_hardif_min_mtu(struct net_device *mesh_iface);
79void batadv_update_min_mtu(struct net_device *mesh_iface);
80void batadv_hardif_release(struct kref *ref);
81int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing,
82 u8 *orig_addr, u8 *orig_neigh);
83
84/**
85 * batadv_hardif_put() - decrement the hard interface refcounter and possibly
86 * release it
87 * @hard_iface: the hard interface to free
88 */
89static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
90{
91 if (!hard_iface)
92 return;
93
94 kref_put(kref: &hard_iface->refcount, release: batadv_hardif_release);
95}
96
97/**
98 * batadv_primary_if_get_selected() - Get reference to primary interface
99 * @bat_priv: the bat priv with all the mesh interface information
100 *
101 * Return: primary interface (with increased refcnt), otherwise NULL
102 */
103static inline struct batadv_hard_iface *
104batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
105{
106 struct batadv_hard_iface *hard_iface;
107
108 rcu_read_lock();
109 hard_iface = rcu_dereference(bat_priv->primary_if);
110 if (!hard_iface)
111 goto out;
112
113 if (!kref_get_unless_zero(kref: &hard_iface->refcount))
114 hard_iface = NULL;
115
116out:
117 rcu_read_unlock();
118 return hard_iface;
119}
120
121#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
122

source code of linux/net/batman-adv/hard-interface.h