1 /* 2 * Copyright (C) 2007-2012 B.A.T.M.A.N. contributors: 3 * 4 * Marek Lindner, Simon Wunderlich 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of version 2 of the GNU General Public 8 * License as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 18 * 02110-1301, USA 19 * 20 */ 21 22 #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_ 23 #define _NET_BATMAN_ADV_HARD_INTERFACE_H_ 24 25 enum hard_if_state { 26 IF_NOT_IN_USE, 27 IF_TO_BE_REMOVED, 28 IF_INACTIVE, 29 IF_ACTIVE, 30 IF_TO_BE_ACTIVATED, 31 IF_I_WANT_YOU 32 }; 33 34 extern struct notifier_block hard_if_notifier; 35 36 struct hard_iface* 37 hardif_get_by_netdev(const struct net_device *net_dev); 38 int hardif_enable_interface(struct hard_iface *hard_iface, 39 const char *iface_name); 40 void hardif_disable_interface(struct hard_iface *hard_iface); 41 void hardif_remove_interfaces(void); 42 int hardif_min_mtu(struct net_device *soft_iface); 43 void update_min_mtu(struct net_device *soft_iface); 44 void hardif_free_rcu(struct rcu_head *rcu); 45 bool is_wifi_iface(int ifindex); 46 47 static inline void hardif_free_ref(struct hard_iface *hard_iface) 48 { 49 if (atomic_dec_and_test(&hard_iface->refcount)) 50 call_rcu(&hard_iface->rcu, hardif_free_rcu); 51 } 52 53 static inline struct hard_iface *primary_if_get_selected( 54 struct bat_priv *bat_priv) 55 { 56 struct hard_iface *hard_iface; 57 58 rcu_read_lock(); 59 hard_iface = rcu_dereference(bat_priv->primary_if); 60 if (!hard_iface) 61 goto out; 62 63 if (!atomic_inc_not_zero(&hard_iface->refcount)) 64 hard_iface = NULL; 65 66 out: 67 rcu_read_unlock(); 68 return hard_iface; 69 } 70 71 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 72