1 /* Copyright (C) 2007-2013 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 /** 33 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal 34 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface 35 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed 36 */ 37 enum batadv_hard_if_cleanup { 38 BATADV_IF_CLEANUP_KEEP, 39 BATADV_IF_CLEANUP_AUTO, 40 }; 41 42 extern struct notifier_block batadv_hard_if_notifier; 43 44 bool batadv_is_wifi_netdev(struct net_device *net_device); 45 struct batadv_hard_iface* 46 batadv_hardif_get_by_netdev(const struct net_device *net_dev); 47 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, 48 const char *iface_name); 49 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, 50 enum batadv_hard_if_cleanup autodel); 51 void batadv_hardif_remove_interfaces(void); 52 int batadv_hardif_min_mtu(struct net_device *soft_iface); 53 void batadv_update_min_mtu(struct net_device *soft_iface); 54 void batadv_hardif_free_rcu(struct rcu_head *rcu); 55 56 static inline void 57 batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) 58 { 59 if (atomic_dec_and_test(&hard_iface->refcount)) 60 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu); 61 } 62 63 static inline struct batadv_hard_iface * 64 batadv_primary_if_get_selected(struct batadv_priv *bat_priv) 65 { 66 struct batadv_hard_iface *hard_iface; 67 68 rcu_read_lock(); 69 hard_iface = rcu_dereference(bat_priv->primary_if); 70 if (!hard_iface) 71 goto out; 72 73 if (!atomic_inc_not_zero(&hard_iface->refcount)) 74 hard_iface = NULL; 75 76 out: 77 rcu_read_unlock(); 78 return hard_iface; 79 } 80 81 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 82