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/*
* net/sched/simp.c Simple example of an action
*
* 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 (2005)
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <net/pkt_sched.h>
#define TCA_ACT_SIMP 22
/* XXX: Hide all these common elements under some macro
* probably
*/
#include <linux/tc_act/tc_defact.h>
#include <net/tc_act/tc_defact.h>
/* use generic hash table with 8 buckets */
#define MY_TAB_SIZE 8
#define MY_TAB_MASK (MY_TAB_SIZE - 1)
static u32 idx_gen;
static struct tcf_defact *tcf_simp_ht[MY_TAB_SIZE];
static DEFINE_RWLOCK(simp_lock);
/* override the defaults */
#define tcf_st tcf_defact
#define tc_st tc_defact
#define tcf_t_lock simp_lock
#define tcf_ht tcf_simp_ht
#define CONFIG_NET_ACT_INIT 1
#include <net/pkt_act.h>
#include <net/act_generic.h>
static int tcf_simp(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res)
{
struct tcf_defact *p = PRIV(a, defact);
spin_lock(&p->lock);
p->tm.lastuse = jiffies;
p->bstats.bytes += skb->len;
p->bstats.packets++;
/* print policy string followed by _ then packet count
* Example if this was the 3rd packet and the string was "hello"
* then it would look like "hello_3" (without quotes)
**/
printk("simple: %s_%d\n", (char *)p->defdata, p->bstats.packets);
spin_unlock(&p->lock);
return p->action;
}
static struct tc_action_ops act_simp_ops = {
.kind = "simple",
.type = TCA_ACT_SIMP,
.capab = TCA_CAP_NONE,
.owner = THIS_MODULE,
.act = tcf_simp,
tca_use_default_ops
};
MODULE_AUTHOR("Jamal Hadi Salim(2005)");
MODULE_DESCRIPTION("Simple example action");
MODULE_LICENSE("GPL");
static int __init simp_init_module(void)
{
int ret = tcf_register_action(&act_simp_ops);
if (!ret)
printk("Simple TC action Loaded\n");
return ret;
}
static void __exit simp_cleanup_module(void)
{
tcf_unregister_action(&act_simp_ops);
}
module_init(simp_init_module);
module_exit(simp_cleanup_module);
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