145 lines
3.3 KiB
C
Executable File
145 lines
3.3 KiB
C
Executable File
/* net/sched/sch_ingress.c - Ingress qdisc
|
|
* 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 1999
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <net/netlink.h>
|
|
#include <net/pkt_sched.h>
|
|
|
|
|
|
struct ingress_qdisc_data {
|
|
struct tcf_proto __rcu *filter_list;
|
|
};
|
|
|
|
/* ------------------------- Class/flow operations ------------------------- */
|
|
|
|
static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static unsigned long ingress_get(struct Qdisc *sch, u32 classid)
|
|
{
|
|
return TC_H_MIN(classid) + 1;
|
|
}
|
|
|
|
static unsigned long ingress_bind_filter(struct Qdisc *sch,
|
|
unsigned long parent, u32 classid)
|
|
{
|
|
return ingress_get(sch, classid);
|
|
}
|
|
|
|
static void ingress_put(struct Qdisc *sch, unsigned long cl)
|
|
{
|
|
}
|
|
|
|
static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
|
|
{
|
|
}
|
|
|
|
static struct tcf_proto __rcu **ingress_find_tcf(struct Qdisc *sch,
|
|
unsigned long cl)
|
|
{
|
|
struct ingress_qdisc_data *p = qdisc_priv(sch);
|
|
|
|
return &p->filter_list;
|
|
}
|
|
|
|
/* --------------------------- Qdisc operations ---------------------------- */
|
|
|
|
static int ingress_enqueue(struct sk_buff *skb, struct Qdisc *sch)
|
|
{
|
|
struct ingress_qdisc_data *p = qdisc_priv(sch);
|
|
struct tcf_result res;
|
|
struct tcf_proto *fl = rcu_dereference_bh(p->filter_list);
|
|
int result;
|
|
|
|
result = tc_classify(skb, fl, &res);
|
|
|
|
qdisc_bstats_update(sch, skb);
|
|
switch (result) {
|
|
case TC_ACT_SHOT:
|
|
result = TC_ACT_SHOT;
|
|
qdisc_qstats_drop(sch);
|
|
break;
|
|
case TC_ACT_STOLEN:
|
|
case TC_ACT_QUEUED:
|
|
result = TC_ACT_STOLEN;
|
|
break;
|
|
case TC_ACT_RECLASSIFY:
|
|
case TC_ACT_OK:
|
|
skb->tc_index = TC_H_MIN(res.classid);
|
|
default:
|
|
result = TC_ACT_OK;
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* ------------------------------------------------------------- */
|
|
|
|
static void ingress_destroy(struct Qdisc *sch)
|
|
{
|
|
struct ingress_qdisc_data *p = qdisc_priv(sch);
|
|
|
|
tcf_destroy_chain(&p->filter_list);
|
|
}
|
|
|
|
static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
|
|
{
|
|
struct nlattr *nest;
|
|
|
|
nest = nla_nest_start(skb, TCA_OPTIONS);
|
|
if (nest == NULL)
|
|
goto nla_put_failure;
|
|
return nla_nest_end(skb, nest);
|
|
|
|
nla_put_failure:
|
|
nla_nest_cancel(skb, nest);
|
|
return -1;
|
|
}
|
|
|
|
static const struct Qdisc_class_ops ingress_class_ops = {
|
|
.leaf = ingress_leaf,
|
|
.get = ingress_get,
|
|
.put = ingress_put,
|
|
.walk = ingress_walk,
|
|
.tcf_chain = ingress_find_tcf,
|
|
.bind_tcf = ingress_bind_filter,
|
|
.unbind_tcf = ingress_put,
|
|
};
|
|
|
|
static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
|
|
.cl_ops = &ingress_class_ops,
|
|
.id = "ingress",
|
|
.priv_size = sizeof(struct ingress_qdisc_data),
|
|
.enqueue = ingress_enqueue,
|
|
.destroy = ingress_destroy,
|
|
.dump = ingress_dump,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init ingress_module_init(void)
|
|
{
|
|
return register_qdisc(&ingress_qdisc_ops);
|
|
}
|
|
|
|
static void __exit ingress_module_exit(void)
|
|
{
|
|
unregister_qdisc(&ingress_qdisc_ops);
|
|
}
|
|
|
|
module_init(ingress_module_init)
|
|
module_exit(ingress_module_exit)
|
|
MODULE_LICENSE("GPL");
|