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/init.h> 14 #include <linux/kref.h> 15 #include <linux/netdevice.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 mesh interface 27 */ 28 BATADV_IF_NOT_IN_USE, 29 30 /** 31 * @BATADV_IF_TO_BE_REMOVED: interface will be removed from mesh 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 struct net_device *batadv_get_real_netdev(struct net_device *net_device); 73 u32 batadv_netdev_get_wifi_flags(struct net_device *net_dev); 74 u32 batadv_hardif_get_wifi_flags(struct batadv_hard_iface *hard_iface); 75 bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface); 76 struct batadv_hard_iface* 77 batadv_hardif_get_by_netdev(const struct net_device *net_dev); 78 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, 79 struct net_device *mesh_iface); 80 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface); 81 int batadv_hardif_min_mtu(struct net_device *mesh_iface); 82 void batadv_update_min_mtu(struct net_device *mesh_iface); 83 void batadv_hardif_release(struct kref *ref); 84 int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, 85 u8 *orig_addr, u8 *orig_neigh); 86 int __init batadv_wifi_net_devices_init(void); 87 void batadv_wifi_net_devices_deinit(void); 88 89 /** 90 * batadv_hardif_put() - decrement the hard interface refcounter and possibly 91 * release it 92 * @hard_iface: the hard interface to free 93 */ 94 static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) 95 { 96 if (!hard_iface) 97 return; 98 99 kref_put(&hard_iface->refcount, batadv_hardif_release); 100 } 101 102 /** 103 * batadv_primary_if_get_selected() - Get reference to primary interface 104 * @bat_priv: the bat priv with all the mesh interface information 105 * 106 * Return: primary interface (with increased refcnt), otherwise NULL 107 */ 108 static inline struct batadv_hard_iface * 109 batadv_primary_if_get_selected(struct batadv_priv *bat_priv) 110 { 111 struct batadv_hard_iface *hard_iface; 112 113 rcu_read_lock(); 114 hard_iface = rcu_dereference(bat_priv->primary_if); 115 if (!hard_iface) 116 goto out; 117 118 if (!kref_get_unless_zero(&hard_iface->refcount)) 119 hard_iface = NULL; 120 121 out: 122 rcu_read_unlock(); 123 return hard_iface; 124 } 125 126 /** 127 * batadv_is_cfg80211() - check if the given hardif is a cfg80211 128 * wifi interface 129 * @wifi_flags: extracted batadv_hard_iface_wifi_flags of a net_device 130 * 131 * Return: true if the net device is a cfg80211 wireless device, false 132 * otherwise. 133 */ 134 static inline bool batadv_is_cfg80211(u32 wifi_flags) 135 { 136 u32 allowed_flags = 0; 137 138 allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; 139 allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT; 140 141 return !!(wifi_flags & allowed_flags); 142 } 143 144 /** 145 * batadv_is_wifi() - check if flags belong to wifi interface 146 * @wifi_flags: extracted batadv_hard_iface_wifi_flags of a net_device 147 * 148 * Return: true if the net device is a 802.11 wireless device, false otherwise. 149 */ 150 static inline bool batadv_is_wifi(u32 wifi_flags) 151 { 152 return wifi_flags != 0; 153 } 154 155 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 156