linux-imx

// SPDX-License-Identifier: GPL-2.0

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

 *

 * Marek Lindner, Simon Wunderlich

 */

​

#include "soft-interface.h"

#include "main.h"

​

#include <linux/atomic.h>

#include <linux/byteorder/generic.h>

#include <linux/cache.h>

#include <linux/compiler.h>

#include <linux/cpumask.h>

#include <linux/errno.h>

#include <linux/etherdevice.h>

#include <linux/ethtool.h>

#include <linux/gfp.h>

#include <linux/if_ether.h>

#include <linux/if_vlan.h>

#include <linux/jiffies.h>

#include <linux/kernel.h>

#include <linux/kref.h>

#include <linux/list.h>

#include <linux/lockdep.h>

#include <linux/netdevice.h>

#include <linux/percpu.h>

#include <linux/printk.h>

#include <linux/random.h>

#include <linux/rculist.h>

#include <linux/rcupdate.h>

#include <linux/rtnetlink.h>

#include <linux/skbuff.h>

#include <linux/slab.h>

#include <linux/socket.h>

#include <linux/spinlock.h>

#include <linux/stddef.h>

#include <linux/string.h>

#include <linux/types.h>

#include <uapi/linux/batadv_packet.h>

#include <uapi/linux/batman_adv.h>

​

#include "bat_algo.h"

#include "bridge_loop_avoidance.h"

#include "debugfs.h"

#include "distributed-arp-table.h"

#include "gateway_client.h"

#include "hard-interface.h"

#include "multicast.h"

#include "network-coding.h"

#include "originator.h"

#include "send.h"

#include "sysfs.h"

#include "translation-table.h"

​

/**

 * batadv_skb_head_push() - Increase header size and move (push) head pointer

 * @skb: packet buffer which should be modified

 * @len: number of bytes to add

 *

 * Return: 0 on success or negative error number in case of failure

 */

int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)

{

    int result;

​

    /* TODO: We must check if we can release all references to non-payload

     * data using __skb_header_release in our skbs to allow skb_cow_header

     * to work optimally. This means that those skbs are not allowed to read

     * or write any data which is before the current position of skb->data

     * after that call and thus allow other skbs with the same data buffer

     * to write freely in that area.

     */

    result = skb_cow_head(skb, len);

    if (result < 0)

        return result;

​

    skb_push(skb, len);

    return 0;

}

​

static int batadv_interface_open(struct net_device *dev)

{

    netif_start_queue(dev);

    return 0;

}

​

static int batadv_interface_release(struct net_device *dev)

{

    netif_stop_queue(dev);

    return 0;

}