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