1 /* net/sched/sch_ingress.c - Ingress and clsact qdisc
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License
5 * as published by the Free Software Foundation; either version
6 * 2 of the License, or (at your option) any later version.
8 * Authors: Jamal Hadi Salim 1999
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/list.h>
14 #include <linux/skbuff.h>
15 #include <linux/rtnetlink.h>
17 #include <net/netlink.h>
18 #include <net/pkt_sched.h>
19 #include <net/pkt_cls.h>
21 struct ingress_sched_data {
22 struct tcf_block *block;
23 struct tcf_block_ext_info block_info;
24 struct mini_Qdisc_pair miniqp;
27 static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
32 static unsigned long ingress_find(struct Qdisc *sch, u32 classid)
34 return TC_H_MIN(classid) + 1;
37 static unsigned long ingress_bind_filter(struct Qdisc *sch,
38 unsigned long parent, u32 classid)
40 return ingress_find(sch, classid);
43 static void ingress_unbind_filter(struct Qdisc *sch, unsigned long cl)
47 static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
51 static struct tcf_block *ingress_tcf_block(struct Qdisc *sch, unsigned long cl)
53 struct ingress_sched_data *q = qdisc_priv(sch);
58 static void clsact_chain_head_change(struct tcf_proto *tp_head, void *priv)
60 struct mini_Qdisc_pair *miniqp = priv;
62 mini_qdisc_pair_swap(miniqp, tp_head);
65 static int ingress_init(struct Qdisc *sch, struct nlattr *opt)
67 struct ingress_sched_data *q = qdisc_priv(sch);
68 struct net_device *dev = qdisc_dev(sch);
70 net_inc_ingress_queue();
72 mini_qdisc_pair_init(&q->miniqp, sch, &dev->miniq_ingress);
74 q->block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
75 q->block_info.chain_head_change = clsact_chain_head_change;
76 q->block_info.chain_head_change_priv = &q->miniqp;
78 return tcf_block_get_ext(&q->block, sch, &q->block_info);
81 static void ingress_destroy(struct Qdisc *sch)
83 struct ingress_sched_data *q = qdisc_priv(sch);
85 tcf_block_put_ext(q->block, sch, &q->block_info);
86 net_dec_ingress_queue();
89 static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
93 nest = nla_nest_start(skb, TCA_OPTIONS);
97 return nla_nest_end(skb, nest);
100 nla_nest_cancel(skb, nest);
104 static const struct Qdisc_class_ops ingress_class_ops = {
105 .leaf = ingress_leaf,
106 .find = ingress_find,
107 .walk = ingress_walk,
108 .tcf_block = ingress_tcf_block,
109 .bind_tcf = ingress_bind_filter,
110 .unbind_tcf = ingress_unbind_filter,
113 static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
114 .cl_ops = &ingress_class_ops,
116 .priv_size = sizeof(struct ingress_sched_data),
117 .static_flags = TCQ_F_CPUSTATS,
118 .init = ingress_init,
119 .destroy = ingress_destroy,
120 .dump = ingress_dump,
121 .owner = THIS_MODULE,
124 struct clsact_sched_data {
125 struct tcf_block *ingress_block;
126 struct tcf_block *egress_block;
127 struct tcf_block_ext_info ingress_block_info;
128 struct tcf_block_ext_info egress_block_info;
129 struct mini_Qdisc_pair miniqp_ingress;
130 struct mini_Qdisc_pair miniqp_egress;
133 static unsigned long clsact_find(struct Qdisc *sch, u32 classid)
135 switch (TC_H_MIN(classid)) {
136 case TC_H_MIN(TC_H_MIN_INGRESS):
137 case TC_H_MIN(TC_H_MIN_EGRESS):
138 return TC_H_MIN(classid);
144 static unsigned long clsact_bind_filter(struct Qdisc *sch,
145 unsigned long parent, u32 classid)
147 return clsact_find(sch, classid);
150 static struct tcf_block *clsact_tcf_block(struct Qdisc *sch, unsigned long cl)
152 struct clsact_sched_data *q = qdisc_priv(sch);
155 case TC_H_MIN(TC_H_MIN_INGRESS):
156 return q->ingress_block;
157 case TC_H_MIN(TC_H_MIN_EGRESS):
158 return q->egress_block;
164 static int clsact_init(struct Qdisc *sch, struct nlattr *opt)
166 struct clsact_sched_data *q = qdisc_priv(sch);
167 struct net_device *dev = qdisc_dev(sch);
170 net_inc_ingress_queue();
171 net_inc_egress_queue();
173 mini_qdisc_pair_init(&q->miniqp_ingress, sch, &dev->miniq_ingress);
175 q->ingress_block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
176 q->ingress_block_info.chain_head_change = clsact_chain_head_change;
177 q->ingress_block_info.chain_head_change_priv = &q->miniqp_ingress;
179 err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info);
183 mini_qdisc_pair_init(&q->miniqp_egress, sch, &dev->miniq_egress);
185 q->egress_block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS;
186 q->egress_block_info.chain_head_change = clsact_chain_head_change;
187 q->egress_block_info.chain_head_change_priv = &q->miniqp_egress;
189 return tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info);
192 static void clsact_destroy(struct Qdisc *sch)
194 struct clsact_sched_data *q = qdisc_priv(sch);
196 tcf_block_put_ext(q->egress_block, sch, &q->egress_block_info);
197 tcf_block_put_ext(q->ingress_block, sch, &q->ingress_block_info);
199 net_dec_ingress_queue();
200 net_dec_egress_queue();
203 static const struct Qdisc_class_ops clsact_class_ops = {
204 .leaf = ingress_leaf,
206 .walk = ingress_walk,
207 .tcf_block = clsact_tcf_block,
208 .bind_tcf = clsact_bind_filter,
209 .unbind_tcf = ingress_unbind_filter,
212 static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
213 .cl_ops = &clsact_class_ops,
215 .priv_size = sizeof(struct clsact_sched_data),
216 .static_flags = TCQ_F_CPUSTATS,
218 .destroy = clsact_destroy,
219 .dump = ingress_dump,
220 .owner = THIS_MODULE,
223 static int __init ingress_module_init(void)
227 ret = register_qdisc(&ingress_qdisc_ops);
229 ret = register_qdisc(&clsact_qdisc_ops);
231 unregister_qdisc(&ingress_qdisc_ops);
237 static void __exit ingress_module_exit(void)
239 unregister_qdisc(&ingress_qdisc_ops);
240 unregister_qdisc(&clsact_qdisc_ops);
243 module_init(ingress_module_init);
244 module_exit(ingress_module_exit);
246 MODULE_ALIAS("sch_clsact");
247 MODULE_LICENSE("GPL");