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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/net/batman-adv/hard-interface.h
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/*

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 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:

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 *

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 * Marek Lindner, Simon Wunderlich

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 *

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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of version 2 of the GNU General Public

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 * License as published by the Free Software Foundation.

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 *

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 * This program is distributed in the hope that it will be useful, but

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 * WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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 * General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

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 * 02110-1301, USA

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 *

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 */

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#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_

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#define _NET_BATMAN_ADV_HARD_INTERFACE_H_

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#define IF_NOT_IN_USE 0

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#define IF_TO_BE_REMOVED 1

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#define IF_INACTIVE 2

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#define IF_ACTIVE 3

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#define IF_TO_BE_ACTIVATED 4

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#define IF_I_WANT_YOU 5

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extern struct notifier_block hard_if_notifier;

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struct hard_iface *hardif_get_by_netdev(struct net_device *net_dev);

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int hardif_enable_interface(struct hard_iface *hard_iface, char *iface_name);

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void hardif_disable_interface(struct hard_iface *hard_iface);

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void hardif_remove_interfaces(void);

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int hardif_min_mtu(struct net_device *soft_iface);

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void update_min_mtu(struct net_device *soft_iface);

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void hardif_free_rcu(struct rcu_head *rcu);

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static inline void hardif_free_ref(struct hard_iface *hard_iface)

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{

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	if (atomic_dec_and_test(&hard_iface->refcount))

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		call_rcu(&hard_iface->rcu, hardif_free_rcu);

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}

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static inline struct hard_iface *primary_if_get_selected(

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						struct bat_priv *bat_priv)

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{

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	struct hard_iface *hard_iface;

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	rcu_read_lock();

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	hard_iface = rcu_dereference(bat_priv->primary_if);

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	if (!hard_iface)

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		goto out;

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	if (!atomic_inc_not_zero(&hard_iface->refcount))

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		hard_iface = NULL;

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out:

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	rcu_read_unlock();

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	return hard_iface;

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}

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#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */

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