diff options
Diffstat (limited to 'net/batman-adv/hard-interface.h')
| -rw-r--r-- | net/batman-adv/hard-interface.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h new file mode 100644 index 00000000..64265991 --- /dev/null +++ b/net/batman-adv/hard-interface.h @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + * + */ + +#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_ +#define _NET_BATMAN_ADV_HARD_INTERFACE_H_ + +#define IF_NOT_IN_USE 0 +#define IF_TO_BE_REMOVED 1 +#define IF_INACTIVE 2 +#define IF_ACTIVE 3 +#define IF_TO_BE_ACTIVATED 4 +#define IF_I_WANT_YOU 5 + +extern struct notifier_block hard_if_notifier; + +struct hard_iface *hardif_get_by_netdev(struct net_device *net_dev); +int hardif_enable_interface(struct hard_iface *hard_iface, char *iface_name); +void hardif_disable_interface(struct hard_iface *hard_iface); +void hardif_remove_interfaces(void); +int hardif_min_mtu(struct net_device *soft_iface); +void update_min_mtu(struct net_device *soft_iface); +void hardif_free_rcu(struct rcu_head *rcu); + +static inline void hardif_free_ref(struct hard_iface *hard_iface) +{ + if (atomic_dec_and_test(&hard_iface->refcount)) + call_rcu(&hard_iface->rcu, hardif_free_rcu); +} + +static inline struct hard_iface *primary_if_get_selected( + struct bat_priv *bat_priv) +{ + struct hard_iface *hard_iface; + + rcu_read_lock(); + hard_iface = rcu_dereference(bat_priv->primary_if); + if (!hard_iface) + goto out; + + if (!atomic_inc_not_zero(&hard_iface->refcount)) + hard_iface = NULL; + +out: + rcu_read_unlock(); + return hard_iface; +} + +#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ |