/* * 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 **pskb, struct tc_action *a, struct tcf_result *res) { struct sk_buff *skb = *pskb; 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);