cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hard-interface.h (3320B)

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