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TOMOYO Linux Cross Reference
Linux/net/batman-adv/hard-interface.h

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  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 

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