2 * net/sched/simp.c Simple example of an action
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Jamal Hadi Salim (2005)
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/netdevice.h>
17 #include <linux/skbuff.h>
18 #include <linux/rtnetlink.h>
19 #include <net/pkt_sched.h>
21 #define TCA_ACT_SIMP 22
23 /* XXX: Hide all these common elements under some macro
26 #include <linux/tc_act/tc_defact.h>
27 #include <net/tc_act/tc_defact.h>
29 /* use generic hash table with 8 buckets */
31 #define MY_TAB_MASK (MY_TAB_SIZE - 1)
33 static struct tcf_defact *tcf_simp_ht[MY_TAB_SIZE];
34 static DEFINE_RWLOCK(simp_lock);
36 /* override the defaults */
37 #define tcf_st tcf_defact
38 #define tc_st tc_defact
39 #define tcf_t_lock simp_lock
40 #define tcf_ht tcf_simp_ht
42 #define CONFIG_NET_ACT_INIT 1
43 #include <net/pkt_act.h>
44 #include <net/act_generic.h>
46 static int tcf_simp(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res)
48 struct tcf_defact *p = PRIV(a, defact);
51 p->tm.lastuse = jiffies;
52 p->bstats.bytes += skb->len;
55 /* print policy string followed by _ then packet count
56 * Example if this was the 3rd packet and the string was "hello"
57 * then it would look like "hello_3" (without quotes)
59 printk("simple: %s_%d\n", (char *)p->defdata, p->bstats.packets);
60 spin_unlock(&p->lock);
64 static struct tc_action_ops act_simp_ops = {
67 .capab = TCA_CAP_NONE,
73 MODULE_AUTHOR("Jamal Hadi Salim(2005)");
74 MODULE_DESCRIPTION("Simple example action");
75 MODULE_LICENSE("GPL");
77 static int __init simp_init_module(void)
79 int ret = tcf_register_action(&act_simp_ops);
81 printk("Simple TC action Loaded\n");
85 static void __exit simp_cleanup_module(void)
87 tcf_unregister_action(&act_simp_ops);
90 module_init(simp_init_module);
91 module_exit(simp_cleanup_module);