linux-imx

/*

 * net/sched/act_mirred.c   packet mirroring and redirect actions

 *

 *      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.

 *

 * Authors: Jamal Hadi Salim (2002-4)

 *

 * TODO: Add ingress support (and socket redirect support)

 *

 */

​

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/errno.h>

#include <linux/skbuff.h>

#include <linux/rtnetlink.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/gfp.h>

#include <linux/if_arp.h>

#include <net/net_namespace.h>

#include <net/netlink.h>

#include <net/pkt_sched.h>

#include <net/pkt_cls.h>

#include <linux/tc_act/tc_mirred.h>

#include <net/tc_act/tc_mirred.h>

​

static LIST_HEAD(mirred_list);

static DEFINE_SPINLOCK(mirred_list_lock);

​

static bool tcf_mirred_is_act_redirect(int action)

{

    return action == TCA_EGRESS_REDIR || action == TCA_INGRESS_REDIR;

}

​

static bool tcf_mirred_act_wants_ingress(int action)

{

    switch (action) {

    case TCA_EGRESS_REDIR:

    case TCA_EGRESS_MIRROR:

        return false;

    case TCA_INGRESS_REDIR:

    case TCA_INGRESS_MIRROR:

        return true;

    default:

        BUG();

    }

}

​

static bool tcf_mirred_can_reinsert(int action)

{

    switch (action) {

    case TC_ACT_SHOT:

    case TC_ACT_STOLEN:

    case TC_ACT_QUEUED:

    case TC_ACT_TRAP:

        return true;

    }

    return false;