linux-imx

// SPDX-License-Identifier: GPL-2.0

/* Copyright (C) 2007-2019  B.A.T.M.A.N. contributors:

 *

 * Marek Lindner, Simon Wunderlich

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of version 2 of the GNU General Public

 * License as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 * General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see <http://www.gnu.org/licenses/>.

 */

​

#include "hard-interface.h"

#include "main.h"

​

#include <linux/atomic.h>

#include <linux/byteorder/generic.h>

#include <linux/errno.h>

#include <linux/gfp.h>

#include <linux/if.h>

#include <linux/if_arp.h>

#include <linux/if_ether.h>

#include <linux/kernel.h>

#include <linux/kref.h>

#include <linux/list.h>

#include <linux/netdevice.h>

#include <linux/printk.h>

#include <linux/rculist.h>

#include <linux/rtnetlink.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

#include <net/net_namespace.h>

#include <net/rtnetlink.h>

#include <uapi/linux/batadv_packet.h>

​

#include "bat_v.h"

#include "bridge_loop_avoidance.h"

#include "debugfs.h"

#include "distributed-arp-table.h"

#include "gateway_client.h"

#include "log.h"

#include "originator.h"

#include "send.h"

#include "soft-interface.h"

#include "sysfs.h"

#include "translation-table.h"

​

/**

 * batadv_hardif_release() - release hard interface from lists and queue for

 *  free after rcu grace period

 * @ref: kref pointer of the hard interface

 */

void batadv_hardif_release(struct kref *ref)

{

    struct batadv_hard_iface *hard_iface;

​

    hard_iface = container_of(ref, struct batadv_hard_iface, refcount);

    dev_put(hard_iface->net_dev);

​

    kfree_rcu(hard_iface, rcu);

}

​

/**

 * batadv_hardif_get_by_netdev() - Get hard interface object of a net_device

 * @net_dev: net_device to search for

 *

 * Return: batadv_hard_iface of net_dev (with increased refcnt), NULL on errors

 */

struct batadv_hard_iface *

batadv_hardif_get_by_netdev(const struct net_device *net_dev)

{

    struct batadv_hard_iface *hard_iface;

​

    rcu_read_lock();

    list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {

        if (hard_iface->net_dev == net_dev &&

            kref_get_unless_zero(&hard_iface->refcount))

            goto out;

    }

​

    hard_iface = NULL;

​

out:

    rcu_read_unlock();

    return hard_iface;

}