Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) 2007-2019 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/notifier.h>
15#include <linux/rcupdate.h>
16#include <linux/stddef.h>
17#include <linux/types.h>
18
19struct net_device;
20struct net;
21
22/**
23 * enum batadv_hard_if_state - State of a hard interface
24 */
25enum batadv_hard_if_state {
26 /**
27 * @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a
28 * batman-adv soft interface
29 */
30 BATADV_IF_NOT_IN_USE,
31
32 /**
33 * @BATADV_IF_TO_BE_REMOVED: interface will be removed from soft
34 * interface
35 */
36 BATADV_IF_TO_BE_REMOVED,
37
38 /** @BATADV_IF_INACTIVE: interface is deactivated */
39 BATADV_IF_INACTIVE,
40
41 /** @BATADV_IF_ACTIVE: interface is used */
42 BATADV_IF_ACTIVE,
43
44 /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */
45 BATADV_IF_TO_BE_ACTIVATED,
46
47 /**
48 * @BATADV_IF_I_WANT_YOU: interface is queued up (using sysfs) for being
49 * added as slave interface of a batman-adv soft interface
50 */
51 BATADV_IF_I_WANT_YOU,
52};
53
54/**
55 * enum batadv_hard_if_bcast - broadcast avoidance options
56 */
57enum batadv_hard_if_bcast {
58 /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */
59 BATADV_HARDIF_BCAST_OK = 0,
60
61 /**
62 * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no
63 * recipient
64 */
65 BATADV_HARDIF_BCAST_NORECIPIENT,
66
67 /**
68 * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it
69 * from
70 */
71 BATADV_HARDIF_BCAST_DUPFWD,
72
73 /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */
74 BATADV_HARDIF_BCAST_DUPORIG,
75};
76
77/**
78 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
79 */
80enum batadv_hard_if_cleanup {
81 /**
82 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
83 */
84 BATADV_IF_CLEANUP_KEEP,
85
86 /**
87 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was
88 * removed
89 */
90 BATADV_IF_CLEANUP_AUTO,
91};
92
93extern struct notifier_block batadv_hard_if_notifier;
94
95struct net_device *batadv_get_real_netdev(struct net_device *net_device);
96bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface);
97bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface);
98struct batadv_hard_iface*
99batadv_hardif_get_by_netdev(const struct net_device *net_dev);
100int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
101 struct net *net, const char *iface_name);
102void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
103 enum batadv_hard_if_cleanup autodel);
104void batadv_hardif_remove_interfaces(void);
105int batadv_hardif_min_mtu(struct net_device *soft_iface);
106void batadv_update_min_mtu(struct net_device *soft_iface);
107void batadv_hardif_release(struct kref *ref);
108int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing,
109 u8 *orig_addr, u8 *orig_neigh);
110
111/**
112 * batadv_hardif_put() - decrement the hard interface refcounter and possibly
113 * release it
114 * @hard_iface: the hard interface to free
115 */
116static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
117{
118 kref_put(&hard_iface->refcount, batadv_hardif_release);
119}
120
121/**
122 * batadv_primary_if_get_selected() - Get reference to primary interface
123 * @bat_priv: the bat priv with all the soft interface information
124 *
125 * Return: primary interface (with increased refcnt), otherwise NULL
126 */
127static inline struct batadv_hard_iface *
128batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
129{
130 struct batadv_hard_iface *hard_iface;
131
132 rcu_read_lock();
133 hard_iface = rcu_dereference(bat_priv->primary_if);
134 if (!hard_iface)
135 goto out;
136
137 if (!kref_get_unless_zero(&hard_iface->refcount))
138 hard_iface = NULL;
139
140out:
141 rcu_read_unlock();
142 return hard_iface;
143}
144
145#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */