linux/net/batman-adv/hard-interface.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (C) B.A.T.M.A.N. contributors:
   3 *
   4 * Marek Lindner, Simon Wunderlich
   5 */
   6
   7#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
   8#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
   9
  10#include "main.h"
  11
  12#include <linux/compiler.h>
  13#include <linux/kref.h>
  14#include <linux/netdevice.h>
  15#include <linux/notifier.h>
  16#include <linux/rcupdate.h>
  17#include <linux/stddef.h>
  18#include <linux/types.h>
  19#include <net/net_namespace.h>
  20
  21/**
  22 * enum batadv_hard_if_state - State of a hard interface
  23 */
  24enum batadv_hard_if_state {
  25        /**
  26         * @BATADV_IF_NOT_IN_USE: interface is not used as slave interface of a
  27         * batman-adv soft interface
  28         */
  29        BATADV_IF_NOT_IN_USE,
  30
  31        /**
  32         * @BATADV_IF_TO_BE_REMOVED: interface will be removed from soft
  33         * interface
  34         */
  35        BATADV_IF_TO_BE_REMOVED,
  36
  37        /** @BATADV_IF_INACTIVE: interface is deactivated */
  38        BATADV_IF_INACTIVE,
  39
  40        /** @BATADV_IF_ACTIVE: interface is used */
  41        BATADV_IF_ACTIVE,
  42
  43        /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */
  44        BATADV_IF_TO_BE_ACTIVATED,
  45};
  46
  47/**
  48 * enum batadv_hard_if_bcast - broadcast avoidance options
  49 */
  50enum batadv_hard_if_bcast {
  51        /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */
  52        BATADV_HARDIF_BCAST_OK = 0,
  53
  54        /**
  55         * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no
  56         *  recipient
  57         */
  58        BATADV_HARDIF_BCAST_NORECIPIENT,
  59
  60        /**
  61         * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it
  62         *  from
  63         */
  64        BATADV_HARDIF_BCAST_DUPFWD,
  65
  66        /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */
  67        BATADV_HARDIF_BCAST_DUPORIG,
  68};
  69
  70extern struct notifier_block batadv_hard_if_notifier;
  71
  72struct net_device *batadv_get_real_netdev(struct net_device *net_device);
  73bool batadv_is_cfg80211_hardif(struct batadv_hard_iface *hard_iface);
  74bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface);
  75struct batadv_hard_iface*
  76batadv_hardif_get_by_netdev(const struct net_device *net_dev);
  77int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
  78                                   struct net *net, const char *iface_name);
  79void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface);
  80int batadv_hardif_min_mtu(struct net_device *soft_iface);
  81void batadv_update_min_mtu(struct net_device *soft_iface);
  82void batadv_hardif_release(struct kref *ref);
  83int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing,
  84                               u8 *orig_addr, u8 *orig_neigh);
  85
  86/**
  87 * batadv_hardif_put() - decrement the hard interface refcounter and possibly
  88 *  release it
  89 * @hard_iface: the hard interface to free
  90 */
  91static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
  92{
  93        kref_put(&hard_iface->refcount, batadv_hardif_release);
  94}
  95
  96/**
  97 * batadv_primary_if_get_selected() - Get reference to primary interface
  98 * @bat_priv: the bat priv with all the soft interface information
  99 *
 100 * Return: primary interface (with increased refcnt), otherwise NULL
 101 */
 102static inline struct batadv_hard_iface *
 103batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
 104{
 105        struct batadv_hard_iface *hard_iface;
 106
 107        rcu_read_lock();
 108        hard_iface = rcu_dereference(bat_priv->primary_if);
 109        if (!hard_iface)
 110                goto out;
 111
 112        if (!kref_get_unless_zero(&hard_iface->refcount))
 113                hard_iface = NULL;
 114
 115out:
 116        rcu_read_unlock();
 117        return hard_iface;
 118}
 119
 120#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
 121