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 */ 22 enum 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 */ 48 enum 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 68 extern struct notifier_block batadv_hard_if_notifier; 69 70 struct net_device *batadv_get_real_netdev(struct net_device *net_device); 71 bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface); 72 bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface); 73 struct batadv_hard_iface* 74 batadv_hardif_get_by_netdev(const struct net_device *net_dev); 75 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, 76 struct net_device *mesh_iface); 77 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface); 78 int batadv_hardif_min_mtu(struct net_device *mesh_iface); 79 void batadv_update_min_mtu(struct net_device *mesh_iface); 80 void batadv_hardif_release(struct kref *ref); 81 int 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 */ 89 static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) 90 { 91 if (!hard_iface) 92 return; 93 94 kref_put(&hard_iface->refcount, 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 */ 103 static inline struct batadv_hard_iface * 104 batadv_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(&hard_iface->refcount)) 114 hard_iface = NULL; 115 116 out: 117 rcu_read_unlock(); 118 return hard_iface; 119 } 120 121 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 122