LXR linux/net/batman-adv/hard-interface.h

   1/* Copyright (C) 2007-2016  B.A.T.M.A.N. contributors:
   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, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
  19#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
  20
  21#include "main.h"
  22
  23#include <linux/compiler.h>
  24#include <linux/kref.h>
  25#include <linux/notifier.h>
  26#include <linux/rcupdate.h>
  27#include <linux/stddef.h>
  28#include <linux/types.h>
  29
  30struct net_device;
  31struct net;
  32
  33enum batadv_hard_if_state {
  34        BATADV_IF_NOT_IN_USE,
  35        BATADV_IF_TO_BE_REMOVED,
  36        BATADV_IF_INACTIVE,
  37        BATADV_IF_ACTIVE,
  38        BATADV_IF_TO_BE_ACTIVATED,
  39        BATADV_IF_I_WANT_YOU,
  40};
  41
  42/**
  43 * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal
  44 * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface
  45 * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed
  46 */
  47enum batadv_hard_if_cleanup {
  48        BATADV_IF_CLEANUP_KEEP,
  49        BATADV_IF_CLEANUP_AUTO,
  50};
  51
  52extern struct notifier_block batadv_hard_if_notifier;
  53
  54bool batadv_is_wifi_netdev(struct net_device *net_device);
  55bool batadv_is_wifi_iface(int ifindex);
  56struct batadv_hard_iface*
  57batadv_hardif_get_by_netdev(const struct net_device *net_dev);
  58int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
  59                                   struct net *net, const char *iface_name);
  60void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
  61                                     enum batadv_hard_if_cleanup autodel);
  62void batadv_hardif_remove_interfaces(void);
  63int batadv_hardif_min_mtu(struct net_device *soft_iface);
  64void batadv_update_min_mtu(struct net_device *soft_iface);
  65void batadv_hardif_release(struct kref *ref);
  66
  67/**
  68 * batadv_hardif_put - decrement the hard interface refcounter and possibly
  69 *  release it
  70 * @hard_iface: the hard interface to free
  71 */
  72static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface)
  73{
  74        kref_put(&hard_iface->refcount, batadv_hardif_release);
  75}
  76
  77static inline struct batadv_hard_iface *
  78batadv_primary_if_get_selected(struct batadv_priv *bat_priv)
  79{
  80        struct batadv_hard_iface *hard_iface;
  81
  82        rcu_read_lock();
  83        hard_iface = rcu_dereference(bat_priv->primary_if);
  84        if (!hard_iface)
  85                goto out;
  86
  87        if (!kref_get_unless_zero(&hard_iface->refcount))
  88                hard_iface = NULL;
  89
  90out:
  91        rcu_read_unlock();
  92        return hard_iface;
  93}
  94
  95#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
  96