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/notifier.h> |
16 | #include <linux/rcupdate.h> |
17 | #include <linux/stddef.h> |
18 | #include <linux/types.h> |
19 | |
20 | /** |
21 | * enum batadv_hard_if_state - State of a hard interface |
22 | */ |
23 | enum batadv_hard_if_state { |
24 | /** |
25 | * @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a |
26 | * batman-adv soft interface |
27 | */ |
28 | BATADV_IF_NOT_IN_USE, |
29 | |
30 | /** |
31 | * @BATADV_IF_TO_BE_REMOVED: interface will be removed from soft |
32 | * interface |
33 | */ |
34 | BATADV_IF_TO_BE_REMOVED, |
35 | |
36 | /** @BATADV_IF_INACTIVE: interface is deactivated */ |
37 | BATADV_IF_INACTIVE, |
38 | |
39 | /** @BATADV_IF_ACTIVE: interface is used */ |
40 | BATADV_IF_ACTIVE, |
41 | |
42 | /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */ |
43 | BATADV_IF_TO_BE_ACTIVATED, |
44 | }; |
45 | |
46 | /** |
47 | * enum batadv_hard_if_bcast - broadcast avoidance options |
48 | */ |
49 | enum batadv_hard_if_bcast { |
50 | /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */ |
51 | BATADV_HARDIF_BCAST_OK = 0, |
52 | |
53 | /** |
54 | * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no |
55 | * recipient |
56 | */ |
57 | BATADV_HARDIF_BCAST_NORECIPIENT, |
58 | |
59 | /** |
60 | * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it |
61 | * from |
62 | */ |
63 | BATADV_HARDIF_BCAST_DUPFWD, |
64 | |
65 | /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */ |
66 | BATADV_HARDIF_BCAST_DUPORIG, |
67 | }; |
68 | |
69 | extern struct notifier_block batadv_hard_if_notifier; |
70 | |
71 | struct net_device *batadv_get_real_netdev(struct net_device *net_device); |
72 | bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface); |
73 | bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface); |
74 | struct batadv_hard_iface* |
75 | batadv_hardif_get_by_netdev(const struct net_device *net_dev); |
76 | int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, |
77 | struct net_device *soft_iface); |
78 | void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface); |
79 | int batadv_hardif_min_mtu(struct net_device *soft_iface); |
80 | void batadv_update_min_mtu(struct net_device *soft_iface); |
81 | void batadv_hardif_release(struct kref *ref); |
82 | int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, |
83 | u8 *orig_addr, u8 *orig_neigh); |
84 | |
85 | /** |
86 | * batadv_hardif_put() - decrement the hard interface refcounter and possibly |
87 | * release it |
88 | * @hard_iface: the hard interface to free |
89 | */ |
90 | static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) |
91 | { |
92 | if (!hard_iface) |
93 | return; |
94 | |
95 | kref_put(kref: &hard_iface->refcount, release: batadv_hardif_release); |
96 | } |
97 | |
98 | /** |
99 | * batadv_primary_if_get_selected() - Get reference to primary interface |
100 | * @bat_priv: the bat priv with all the soft interface information |
101 | * |
102 | * Return: primary interface (with increased refcnt), otherwise NULL |
103 | */ |
104 | static inline struct batadv_hard_iface * |
105 | batadv_primary_if_get_selected(struct batadv_priv *bat_priv) |
106 | { |
107 | struct batadv_hard_iface *hard_iface; |
108 | |
109 | rcu_read_lock(); |
110 | hard_iface = rcu_dereference(bat_priv->primary_if); |
111 | if (!hard_iface) |
112 | goto out; |
113 | |
114 | if (!kref_get_unless_zero(kref: &hard_iface->refcount)) |
115 | hard_iface = NULL; |
116 | |
117 | out: |
118 | rcu_read_unlock(); |
119 | return hard_iface; |
120 | } |
121 | |
122 | #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ |
123 | |