[linux-2.6-block.git] / net / batman-adv / hard-interface.h

/* Copyright (C) 2007-2013 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_

enum batadv_hard_if_state {
	BATADV_IF_NOT_IN_USE,
	BATADV_IF_TO_BE_REMOVED,
	BATADV_IF_INACTIVE,
	BATADV_IF_ACTIVE,
	BATADV_IF_TO_BE_ACTIVATED,
	BATADV_IF_I_WANT_YOU,
};

/**
 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
 */
enum batadv_hard_if_cleanup {
	BATADV_IF_CLEANUP_KEEP,
	BATADV_IF_CLEANUP_AUTO,
};

extern struct notifier_block batadv_hard_if_notifier;

bool batadv_is_wifi_netdev(struct net_device *net_device);
struct batadv_hard_iface*
batadv_hardif_get_by_netdev(const struct net_device *net_dev);
int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
				   const char *iface_name);
void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
				     enum batadv_hard_if_cleanup autodel);
void batadv_hardif_remove_interfaces(void);
int batadv_hardif_min_mtu(struct net_device *soft_iface);
void batadv_update_min_mtu(struct net_device *soft_iface);
void batadv_hardif_free_rcu(struct rcu_head *rcu);

static inline void
batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
{
	if (atomic_dec_and_test(&hard_iface->refcount))
		call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
}

static inline struct batadv_hard_iface *
batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
{
	struct batadv_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_ */
Commit	Line	Data
0b873931	1	/* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors:
c6c8fea2 SE	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, write to the Free Software
	16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	17	* 02110-1301, USA
c6c8fea2 SE	18	*/
	19
	20	#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
	21	#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
	22
e9a4f295 SE	23	enum batadv_hard_if_state {
	24	BATADV_IF_NOT_IN_USE,
	25	BATADV_IF_TO_BE_REMOVED,
	26	BATADV_IF_INACTIVE,
	27	BATADV_IF_ACTIVE,
	28	BATADV_IF_TO_BE_ACTIVATED,
	29	BATADV_IF_I_WANT_YOU,
e8958dbf	30	};
c6c8fea2	31
a15fd361 SE	32	/**
	33	* enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
	34	* @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
	35	* @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
	36	*/
	37	enum batadv_hard_if_cleanup {
	38	BATADV_IF_CLEANUP_KEEP,
	39	BATADV_IF_CLEANUP_AUTO,
	40	};
	41
9563877e	42	extern struct notifier_block batadv_hard_if_notifier;
c6c8fea2	43
0c69aecc	44	bool batadv_is_wifi_netdev(struct net_device *net_device);
56303d34	45	struct batadv_hard_iface*
9563877e	46	batadv_hardif_get_by_netdev(const struct net_device *net_dev);
56303d34	47	int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
9563877e	48	const char *iface_name);
a15fd361 SE	49	void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
a15fd361 SE	50	enum batadv_hard_if_cleanup autodel);
9563877e SE	51	void batadv_hardif_remove_interfaces(void);
	52	int batadv_hardif_min_mtu(struct net_device *soft_iface);
	53	void batadv_update_min_mtu(struct net_device *soft_iface);
	54	void batadv_hardif_free_rcu(struct rcu_head *rcu);
c6c8fea2	55
e5d89254	56	static inline void
56303d34	57	batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface)
c6c8fea2	58	{
e6c10f43	59	if (atomic_dec_and_test(&hard_iface->refcount))
9563877e	60	call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
c6c8fea2 SE	61	}
c6c8fea2 SE	62
56303d34 SE	63	static inline struct batadv_hard_iface *
56303d34 SE	64	batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
32ae9b22	65	{
56303d34	66	struct batadv_hard_iface *hard_iface;
32ae9b22 ML	67
	68	rcu_read_lock();
	69	hard_iface = rcu_dereference(bat_priv->primary_if);
	70	if (!hard_iface)
	71	goto out;
	72
	73	if (!atomic_inc_not_zero(&hard_iface->refcount))
	74	hard_iface = NULL;
	75
	76	out:
	77	rcu_read_unlock();
	78	return hard_iface;
	79	}
	80
c6c8fea2	81	#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */