1 /* Copyright (C) 2007-2016 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 #include "main.h" 22 23 #include <linux/compiler.h> 24 #include <linux/kref.h> 25 #include <linux/notifier.h> 26 #include <linux/rcupdate.h> 27 #include <linux/stddef.h> 28 #include <linux/types.h> 29 30 struct net_device; 31 struct net; 32 33 enum batadv_hard_if_state { 34 BATADV_IF_NOT_IN_USE, 35 BATADV_IF_TO_BE_REMOVED, 36 BATADV_IF_INACTIVE, 37 BATADV_IF_ACTIVE, 38 BATADV_IF_TO_BE_ACTIVATED, 39 BATADV_IF_I_WANT_YOU, 40 }; 41 42 /** 43 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal 44 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface 45 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed 46 */ 47 enum batadv_hard_if_cleanup { 48 BATADV_IF_CLEANUP_KEEP, 49 BATADV_IF_CLEANUP_AUTO, 50 }; 51 52 extern struct notifier_block batadv_hard_if_notifier; 53 54 bool batadv_is_wifi_netdev(struct net_device *net_device); 55 bool batadv_is_wifi_iface(int ifindex); 56 struct batadv_hard_iface* 57 batadv_hardif_get_by_netdev(const struct net_device *net_dev); 58 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, 59 struct net *net, const char *iface_name); 60 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, 61 enum batadv_hard_if_cleanup autodel); 62 void batadv_hardif_remove_interfaces(void); 63 int batadv_hardif_min_mtu(struct net_device *soft_iface); 64 void batadv_update_min_mtu(struct net_device *soft_iface); 65 void batadv_hardif_release(struct kref *ref); 66 67 /** 68 * batadv_hardif_put - decrement the hard interface refcounter and possibly 69 * release it 70 * @hard_iface: the hard interface to free 71 */ 72 static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) 73 { 74 kref_put(&hard_iface->refcount, batadv_hardif_release); 75 } 76 77 static inline struct batadv_hard_iface * 78 batadv_primary_if_get_selected(struct batadv_priv *bat_priv) 79 { 80 struct batadv_hard_iface *hard_iface; 81 82 rcu_read_lock(); 83 hard_iface = rcu_dereference(bat_priv->primary_if); 84 if (!hard_iface) 85 goto out; 86 87 if (!kref_get_unless_zero(&hard_iface->refcount)) 88 hard_iface = NULL; 89 90 out: 91 rcu_read_unlock(); 92 return hard_iface; 93 } 94 95 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ 96