1 /* Copyright (C) 2007-2014 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, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_ 19 #define _NET_BATMAN_ADV_HARD_INTERFACE_H_ 20 21 enum batadv_hard_if_state { 22 BATADV_IF_NOT_IN_USE, 23 BATADV_IF_TO_BE_REMOVED, 24 BATADV_IF_INACTIVE, 25 BATADV_IF_ACTIVE, 26 BATADV_IF_TO_BE_ACTIVATED, 27 BATADV_IF_I_WANT_YOU, 28 }; 29 30 /** 31 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal 32 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface 33 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed 34 */ 35 enum batadv_hard_if_cleanup { 36 BATADV_IF_CLEANUP_KEEP, 37 BATADV_IF_CLEANUP_AUTO, 38 }; 39 40 extern struct notifier_block batadv_hard_if_notifier; 41 42 bool batadv_is_wifi_netdev(struct net_device *net_device); 43 bool batadv_is_wifi_iface(int ifindex); 44 struct batadv_hard_iface* 45 batadv_hardif_get_by_netdev(const struct net_device *net_dev); 46 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, 47 const char *iface_name); 48 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, 49 enum batadv_hard_if_cleanup autodel); 50 void batadv_hardif_remove_interfaces(void); 51 int batadv_hardif_min_mtu(struct net_device *soft_iface); 52 void batadv_update_min_mtu(struct net_device *soft_iface); 53 void batadv_hardif_free_rcu(struct rcu_head *rcu); 54 55 /** 56 * batadv_hardif_free_ref - decrement the hard interface refcounter and 57 * possibly free it 58 * @hard_iface: the hard interface to free 59 */ 60 static inline void 61 batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) 62 { 63 if (atomic_dec_and_test(&hard_iface->refcount)) 64 call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu); 65 } 66 67 /** 68 * batadv_hardif_free_ref_now - decrement the hard interface refcounter and 69 * possibly free it (without rcu callback) 70 * @hard_iface: the hard interface to free 71 */ 72 static inline void 73 batadv_hardif_free_ref_now(struct batadv_hard_iface *hard_iface) 74 { 75 if (atomic_dec_and_test(&hard_iface->refcount)) 76 batadv_hardif_free_rcu(&hard_iface->rcu); 77 } 78 79 static inline struct batadv_hard_iface * 80 batadv_primary_if_get_selected(struct batadv_priv *bat_priv) 81 { 82 struct batadv_hard_iface *hard_iface; 83 84 rcu_read_lock(); 85 hard_iface = rcu_dereference(bat_priv->primary_if); 86 if (!hard_iface) 87 goto out; 88 89 if (!atomic_inc_not_zero(&hard_iface->refcount)) 90 hard_iface = NULL; 91 92 out: 93 rcu_read_unlock(); 94 return hard_iface; 95 } 96 97 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 98