forked from Minki/linux
6e40cf2d4d
Use previously introduced extended variants of block get and put functions. This allows to specify a binder types specific to clsact ingress/egress which is useful for drivers to distinguish who actually got the block. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
249 lines
5.7 KiB
C
249 lines
5.7 KiB
C
/* net/sched/sch_ingress.c - Ingress and clsact 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>
|
|
#include <net/pkt_cls.h>
|
|
|
|
struct ingress_sched_data {
|
|
struct tcf_block *block;
|
|
struct tcf_block_ext_info block_info;
|
|
};
|
|
|
|
static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static unsigned long ingress_find(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_find(sch, classid);
|
|
}
|
|
|
|
static void ingress_unbind_filter(struct Qdisc *sch, unsigned long cl)
|
|
{
|
|
}
|
|
|
|
static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
|
|
{
|
|
}
|
|
|
|
static struct tcf_block *ingress_tcf_block(struct Qdisc *sch, unsigned long cl)
|
|
{
|
|
struct ingress_sched_data *q = qdisc_priv(sch);
|
|
|
|
return q->block;
|
|
}
|
|
|
|
static int ingress_init(struct Qdisc *sch, struct nlattr *opt)
|
|
{
|
|
struct ingress_sched_data *q = qdisc_priv(sch);
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
int err;
|
|
|
|
q->block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
|
|
|
|
err = tcf_block_get_ext(&q->block, &dev->ingress_cl_list,
|
|
sch, &q->block_info);
|
|
if (err)
|
|
return err;
|
|
|
|
net_inc_ingress_queue();
|
|
sch->flags |= TCQ_F_CPUSTATS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ingress_destroy(struct Qdisc *sch)
|
|
{
|
|
struct ingress_sched_data *q = qdisc_priv(sch);
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
|
|
tcf_block_put_ext(q->block, &dev->ingress_cl_list,
|
|
sch, &q->block_info);
|
|
net_dec_ingress_queue();
|
|
}
|
|
|
|
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,
|
|
.find = ingress_find,
|
|
.walk = ingress_walk,
|
|
.tcf_block = ingress_tcf_block,
|
|
.bind_tcf = ingress_bind_filter,
|
|
.unbind_tcf = ingress_unbind_filter,
|
|
};
|
|
|
|
static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
|
|
.cl_ops = &ingress_class_ops,
|
|
.id = "ingress",
|
|
.priv_size = sizeof(struct ingress_sched_data),
|
|
.init = ingress_init,
|
|
.destroy = ingress_destroy,
|
|
.dump = ingress_dump,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
struct clsact_sched_data {
|
|
struct tcf_block *ingress_block;
|
|
struct tcf_block *egress_block;
|
|
struct tcf_block_ext_info ingress_block_info;
|
|
struct tcf_block_ext_info egress_block_info;
|
|
};
|
|
|
|
static unsigned long clsact_find(struct Qdisc *sch, u32 classid)
|
|
{
|
|
switch (TC_H_MIN(classid)) {
|
|
case TC_H_MIN(TC_H_MIN_INGRESS):
|
|
case TC_H_MIN(TC_H_MIN_EGRESS):
|
|
return TC_H_MIN(classid);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static unsigned long clsact_bind_filter(struct Qdisc *sch,
|
|
unsigned long parent, u32 classid)
|
|
{
|
|
return clsact_find(sch, classid);
|
|
}
|
|
|
|
static struct tcf_block *clsact_tcf_block(struct Qdisc *sch, unsigned long cl)
|
|
{
|
|
struct clsact_sched_data *q = qdisc_priv(sch);
|
|
|
|
switch (cl) {
|
|
case TC_H_MIN(TC_H_MIN_INGRESS):
|
|
return q->ingress_block;
|
|
case TC_H_MIN(TC_H_MIN_EGRESS):
|
|
return q->egress_block;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static int clsact_init(struct Qdisc *sch, struct nlattr *opt)
|
|
{
|
|
struct clsact_sched_data *q = qdisc_priv(sch);
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
int err;
|
|
|
|
q->ingress_block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
|
|
|
|
err = tcf_block_get_ext(&q->ingress_block, &dev->ingress_cl_list,
|
|
sch, &q->ingress_block_info);
|
|
if (err)
|
|
return err;
|
|
|
|
q->egress_block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS;
|
|
|
|
err = tcf_block_get_ext(&q->egress_block, &dev->egress_cl_list,
|
|
sch, &q->egress_block_info);
|
|
if (err)
|
|
goto err_egress_block_get;
|
|
|
|
net_inc_ingress_queue();
|
|
net_inc_egress_queue();
|
|
|
|
sch->flags |= TCQ_F_CPUSTATS;
|
|
|
|
return 0;
|
|
|
|
err_egress_block_get:
|
|
tcf_block_put_ext(q->ingress_block, &dev->ingress_cl_list,
|
|
sch, &q->ingress_block_info);
|
|
return err;
|
|
}
|
|
|
|
static void clsact_destroy(struct Qdisc *sch)
|
|
{
|
|
struct clsact_sched_data *q = qdisc_priv(sch);
|
|
struct net_device *dev = qdisc_dev(sch);
|
|
|
|
tcf_block_put_ext(q->egress_block, &dev->egress_cl_list,
|
|
sch, &q->egress_block_info);
|
|
tcf_block_put_ext(q->ingress_block, &dev->ingress_cl_list,
|
|
sch, &q->ingress_block_info);
|
|
|
|
net_dec_ingress_queue();
|
|
net_dec_egress_queue();
|
|
}
|
|
|
|
static const struct Qdisc_class_ops clsact_class_ops = {
|
|
.leaf = ingress_leaf,
|
|
.find = clsact_find,
|
|
.walk = ingress_walk,
|
|
.tcf_block = clsact_tcf_block,
|
|
.bind_tcf = clsact_bind_filter,
|
|
.unbind_tcf = ingress_unbind_filter,
|
|
};
|
|
|
|
static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
|
|
.cl_ops = &clsact_class_ops,
|
|
.id = "clsact",
|
|
.priv_size = sizeof(struct clsact_sched_data),
|
|
.init = clsact_init,
|
|
.destroy = clsact_destroy,
|
|
.dump = ingress_dump,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init ingress_module_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = register_qdisc(&ingress_qdisc_ops);
|
|
if (!ret) {
|
|
ret = register_qdisc(&clsact_qdisc_ops);
|
|
if (ret)
|
|
unregister_qdisc(&ingress_qdisc_ops);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ingress_module_exit(void)
|
|
{
|
|
unregister_qdisc(&ingress_qdisc_ops);
|
|
unregister_qdisc(&clsact_qdisc_ops);
|
|
}
|
|
|
|
module_init(ingress_module_init);
|
|
module_exit(ingress_module_exit);
|
|
|
|
MODULE_ALIAS("sch_clsact");
|
|
MODULE_LICENSE("GPL");
|