linux-imx

/*

 * INET     An implementation of the TCP/IP protocol suite for the LINUX

 *      operating system.  INET is implemented using the  BSD Socket

 *      interface as the means of communication with the user level.

 *

 *      Pseudo-driver for the loopback interface.

 *

 * Version: @(#)loopback.c  1.0.4b  08/16/93

 *

 * Authors: Ross Biro

 *      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>

 *      Donald Becker, <becker@scyld.com>

 *

 *      Alan Cox    :   Fixed oddments for NET3.014

 *      Alan Cox    :   Rejig for NET3.029 snap #3

 *      Alan Cox    :   Fixed NET3.029 bugs and sped up

 *      Larry McVoy :   Tiny tweak to double performance

 *      Alan Cox    :   Backed out LMV's tweak - the linux mm

 *                  can't take it...

 *              Michael Griffith:       Don't bother computing the checksums

 *                                      on packets received on the loopback

 *                                      interface.

 *      Alexey Kuznetsov:   Potential hang under some extreme

 *                  cases removed.

 *

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

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 */

#include <linux/kernel.h>

#include <linux/jiffies.h>

#include <linux/module.h>

#include <linux/interrupt.h>

#include <linux/fs.h>

#include <linux/types.h>

#include <linux/string.h>

#include <linux/socket.h>

#include <linux/errno.h>

#include <linux/fcntl.h>

#include <linux/in.h>

​

#include <linux/uaccess.h>

#include <linux/io.h>

​

#include <linux/inet.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <linux/skbuff.h>

#include <linux/ethtool.h>

#include <net/sock.h>

#include <net/checksum.h>

#include <linux/if_ether.h> /* For the statistics structure. */

#include <linux/if_arp.h>   /* For ARPHRD_ETHER */

#include <linux/ip.h>

#include <linux/tcp.h>

#include <linux/percpu.h>

#include <linux/net_tstamp.h>

#include <net/net_namespace.h>

#include <linux/u64_stats_sync.h>

​

/* The higher levels take care of making this non-reentrant (it's

 * called with bh's disabled).