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(&hard_iface->refcount, 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(&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