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