1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2007-2020 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 #include <net/net_namespace.h> 20 21 /** 22 * enum batadv_hard_if_state - State of a hard interface 23 */ 24 enum batadv_hard_if_state { 25 /** 26 * @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a 27 * batman-adv soft interface 28 */ 29 BATADV_IF_NOT_IN_USE, 30 31 /** 32 * @BATADV_IF_TO_BE_REMOVED: interface will be removed from soft 33 * interface 34 */ 35 BATADV_IF_TO_BE_REMOVED, 36 37 /** @BATADV_IF_INACTIVE: interface is deactivated */ 38 BATADV_IF_INACTIVE, 39 40 /** @BATADV_IF_ACTIVE: interface is used */ 41 BATADV_IF_ACTIVE, 42 43 /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */ 44 BATADV_IF_TO_BE_ACTIVATED, 45 }; 46 47 /** 48 * enum batadv_hard_if_bcast - broadcast avoidance options 49 */ 50 enum batadv_hard_if_bcast { 51 /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */ 52 BATADV_HARDIF_BCAST_OK = 0, 53 54 /** 55 * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no 56 * recipient 57 */ 58 BATADV_HARDIF_BCAST_NORECIPIENT, 59 60 /** 61 * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it 62 * from 63 */ 64 BATADV_HARDIF_BCAST_DUPFWD, 65 66 /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */ 67 BATADV_HARDIF_BCAST_DUPORIG, 68 }; 69 70 extern struct notifier_block batadv_hard_if_notifier; 71 72 struct net_device *batadv_get_real_netdev(struct net_device *net_device); 73 bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface); 74 bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface); 75 struct batadv_hard_iface* 76 batadv_hardif_get_by_netdev(const struct net_device *net_dev); 77 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, 78 struct net *net, const char *iface_name); 79 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface); 80 int batadv_hardif_min_mtu(struct net_device *soft_iface); 81 void batadv_update_min_mtu(struct net_device *soft_iface); 82 void batadv_hardif_release(struct kref *ref); 83 int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, 84 u8 *orig_addr, u8 *orig_neigh); 85 86 /** 87 * batadv_hardif_put() - decrement the hard interface refcounter and possibly 88 * release it 89 * @hard_iface: the hard interface to free 90 */ 91 static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) 92 { 93 kref_put(&hard_iface->refcount, batadv_hardif_release); 94 } 95 96 /** 97 * batadv_primary_if_get_selected() - Get reference to primary interface 98 * @bat_priv: the bat priv with all the soft interface information 99 * 100 * Return: primary interface (with increased refcnt), otherwise NULL 101 */ 102 static inline struct batadv_hard_iface * 103 batadv_primary_if_get_selected(struct batadv_priv *bat_priv) 104 { 105 struct batadv_hard_iface *hard_iface; 106 107 rcu_read_lock(); 108 hard_iface = rcu_dereference(bat_priv->primary_if); 109 if (!hard_iface) 110 goto out; 111 112 if (!kref_get_unless_zero(&hard_iface->refcount)) 113 hard_iface = NULL; 114 115 out: 116 rcu_read_unlock(); 117 return hard_iface; 118 } 119 120 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 121