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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2007-2020 B.A.T.M.A.N. contributors:
*
* Marek Lindner, Simon Wunderlich
*/
#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
#include "main.h"
#include <linux/compiler.h>
#include <linux/kref.h>
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/rcupdate.h>
#include <linux/stddef.h>
#include <linux/types.h>
#include <net/net_namespace.h>
/**
* enum batadv_hard_if_state - State of a hard interface
*/
enum batadv_hard_if_state {
/**
* @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a
* batman-adv soft interface
*/
BATADV_IF_NOT_IN_USE,
/**
* @BATADV_IF_TO_BE_REMOVED: interface will be removed from soft
* interface
*/
BATADV_IF_TO_BE_REMOVED,
/** @BATADV_IF_INACTIVE: interface is deactivated */
BATADV_IF_INACTIVE,
/** @BATADV_IF_ACTIVE: interface is used */
BATADV_IF_ACTIVE,
/** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */
BATADV_IF_TO_BE_ACTIVATED,
/**
* @BATADV_IF_I_WANT_YOU: interface is queued up (using sysfs) for being
* added as slave interface of a batman-adv soft interface
*/
BATADV_IF_I_WANT_YOU,
};
/**
* enum batadv_hard_if_bcast - broadcast avoidance options
*/
enum batadv_hard_if_bcast {
/** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */
BATADV_HARDIF_BCAST_OK = 0,
/**
* @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no
* recipient
*/
BATADV_HARDIF_BCAST_NORECIPIENT,
/**
* @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it
* from
*/
BATADV_HARDIF_BCAST_DUPFWD,
/** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */
BATADV_HARDIF_BCAST_DUPORIG,
};
/**
* enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
*/
enum batadv_hard_if_cleanup {
/**
* @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
*/
BATADV_IF_CLEANUP_KEEP,
/**
* @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was
* removed
*/
BATADV_IF_CLEANUP_AUTO,
};
extern struct notifier_block batadv_hard_if_notifier;
struct net_device *batadv_get_real_netdev(struct net_device *net_device);
bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface);
bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface);
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,
struct net *net, const char *iface_name);
void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
enum batadv_hard_if_cleanup autodel);
int batadv_hardif_min_mtu(struct net_device *soft_iface);
void batadv_update_min_mtu(struct net_device *soft_iface);
void batadv_hardif_release(struct kref *ref);
int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing,
u8 *orig_addr, u8 *orig_neigh);
/**
* batadv_hardif_put() - decrement the hard interface refcounter and possibly
* release it
* @hard_iface: the hard interface to free
*/
static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
{
if (!hard_iface)
return;
kref_put(&hard_iface->refcount, batadv_hardif_release);
}
/**
* batadv_primary_if_get_selected() - Get reference to primary interface
* @bat_priv: the bat priv with all the soft interface information
*
* Return: primary interface (with increased refcnt), otherwise NULL
*/
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 (!kref_get_unless_zero(&hard_iface->refcount))
hard_iface = NULL;
out:
rcu_read_unlock();
return hard_iface;
}
#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
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