hard-interface.h

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/* Copyright (C) 2007-2012 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,
};

extern struct notifier_block batadv_hard_if_notifier;

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);
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);
bool batadv_is_wifi_iface(int ifindex);

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_ */