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1/* net/sched/sch_ingress.c - Ingress and clsact qdisc
2 *
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.
7 *
8 * Authors: Jamal Hadi Salim 1999
9 */
10
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>
16
17#include <net/netlink.h>
18#include <net/pkt_sched.h>
19
20static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
21{
22 return NULL;
23}
24
25static unsigned long ingress_get(struct Qdisc *sch, u32 classid)
26{
27 return TC_H_MIN(classid) + 1;
28}
29
30static unsigned long ingress_bind_filter(struct Qdisc *sch,
31 unsigned long parent, u32 classid)
32{
33 return ingress_get(sch, classid);
34}
35
36static void ingress_put(struct Qdisc *sch, unsigned long cl)
37{
38}
39
40static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
41{
42}
43
44static struct tcf_proto __rcu **ingress_find_tcf(struct Qdisc *sch,
45 unsigned long cl)
46{
47 struct net_device *dev = qdisc_dev(sch);
48
49 return &dev->ingress_cl_list;
50}
51
52static int ingress_init(struct Qdisc *sch, struct nlattr *opt)
53{
54 net_inc_ingress_queue();
55 sch->flags |= TCQ_F_CPUSTATS;
56
57 return 0;
58}
59
60static void ingress_destroy(struct Qdisc *sch)
61{
62 struct net_device *dev = qdisc_dev(sch);
63
64 tcf_destroy_chain(&dev->ingress_cl_list);
65 net_dec_ingress_queue();
66}
67
68static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
69{
70 struct nlattr *nest;
71
72 nest = nla_nest_start(skb, TCA_OPTIONS);
73 if (nest == NULL)
74 goto nla_put_failure;
75
76 return nla_nest_end(skb, nest);
77
78nla_put_failure:
79 nla_nest_cancel(skb, nest);
80 return -1;
81}
82
83static const struct Qdisc_class_ops ingress_class_ops = {
84 .leaf = ingress_leaf,
85 .get = ingress_get,
86 .put = ingress_put,
87 .walk = ingress_walk,
88 .tcf_chain = ingress_find_tcf,
89 .bind_tcf = ingress_bind_filter,
90 .unbind_tcf = ingress_put,
91};
92
93static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
94 .cl_ops = &ingress_class_ops,
95 .id = "ingress",
96 .init = ingress_init,
97 .destroy = ingress_destroy,
98 .dump = ingress_dump,
99 .owner = THIS_MODULE,
100};
101
102static unsigned long clsact_get(struct Qdisc *sch, u32 classid)
103{
104 switch (TC_H_MIN(classid)) {
105 case TC_H_MIN(TC_H_MIN_INGRESS):
106 case TC_H_MIN(TC_H_MIN_EGRESS):
107 return TC_H_MIN(classid);
108 default:
109 return 0;
110 }
111}
112
113static unsigned long clsact_bind_filter(struct Qdisc *sch,
114 unsigned long parent, u32 classid)
115{
116 return clsact_get(sch, classid);
117}
118
119static struct tcf_proto __rcu **clsact_find_tcf(struct Qdisc *sch,
120 unsigned long cl)
121{
122 struct net_device *dev = qdisc_dev(sch);
123
124 switch (cl) {
125 case TC_H_MIN(TC_H_MIN_INGRESS):
126 return &dev->ingress_cl_list;
127 case TC_H_MIN(TC_H_MIN_EGRESS):
128 return &dev->egress_cl_list;
129 default:
130 return NULL;
131 }
132}
133
134static int clsact_init(struct Qdisc *sch, struct nlattr *opt)
135{
136 net_inc_ingress_queue();
137 net_inc_egress_queue();
138
139 sch->flags |= TCQ_F_CPUSTATS;
140
141 return 0;
142}
143
144static void clsact_destroy(struct Qdisc *sch)
145{
146 struct net_device *dev = qdisc_dev(sch);
147
148 tcf_destroy_chain(&dev->ingress_cl_list);
149 tcf_destroy_chain(&dev->egress_cl_list);
150
151 net_dec_ingress_queue();
152 net_dec_egress_queue();
153}
154
155static const struct Qdisc_class_ops clsact_class_ops = {
156 .leaf = ingress_leaf,
157 .get = clsact_get,
158 .put = ingress_put,
159 .walk = ingress_walk,
160 .tcf_chain = clsact_find_tcf,
161 .bind_tcf = clsact_bind_filter,
162 .unbind_tcf = ingress_put,
163};
164
165static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
166 .cl_ops = &clsact_class_ops,
167 .id = "clsact",
168 .init = clsact_init,
169 .destroy = clsact_destroy,
170 .dump = ingress_dump,
171 .owner = THIS_MODULE,
172};
173
174static int __init ingress_module_init(void)
175{
176 int ret;
177
178 ret = register_qdisc(&ingress_qdisc_ops);
179 if (!ret) {
180 ret = register_qdisc(&clsact_qdisc_ops);
181 if (ret)
182 unregister_qdisc(&ingress_qdisc_ops);
183 }
184
185 return ret;
186}
187
188static void __exit ingress_module_exit(void)
189{
190 unregister_qdisc(&ingress_qdisc_ops);
191 unregister_qdisc(&clsact_qdisc_ops);
192}
193
194module_init(ingress_module_init);
195module_exit(ingress_module_exit);
196
197MODULE_ALIAS("sch_clsact");
198MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* net/sched/sch_ingress.c - Ingress and clsact qdisc
3 *
4 * Authors: Jamal Hadi Salim 1999
5 */
6
7#include <linux/module.h>
8#include <linux/types.h>
9#include <linux/list.h>
10#include <linux/skbuff.h>
11#include <linux/rtnetlink.h>
12
13#include <net/netlink.h>
14#include <net/pkt_sched.h>
15#include <net/pkt_cls.h>
16
17struct ingress_sched_data {
18 struct tcf_block *block;
19 struct tcf_block_ext_info block_info;
20 struct mini_Qdisc_pair miniqp;
21};
22
23static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
24{
25 return NULL;
26}
27
28static unsigned long ingress_find(struct Qdisc *sch, u32 classid)
29{
30 return TC_H_MIN(classid) + 1;
31}
32
33static unsigned long ingress_bind_filter(struct Qdisc *sch,
34 unsigned long parent, u32 classid)
35{
36 return ingress_find(sch, classid);
37}
38
39static void ingress_unbind_filter(struct Qdisc *sch, unsigned long cl)
40{
41}
42
43static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
44{
45}
46
47static struct tcf_block *ingress_tcf_block(struct Qdisc *sch, unsigned long cl,
48 struct netlink_ext_ack *extack)
49{
50 struct ingress_sched_data *q = qdisc_priv(sch);
51
52 return q->block;
53}
54
55static void clsact_chain_head_change(struct tcf_proto *tp_head, void *priv)
56{
57 struct mini_Qdisc_pair *miniqp = priv;
58
59 mini_qdisc_pair_swap(miniqp, tp_head);
60};
61
62static void ingress_ingress_block_set(struct Qdisc *sch, u32 block_index)
63{
64 struct ingress_sched_data *q = qdisc_priv(sch);
65
66 q->block_info.block_index = block_index;
67}
68
69static u32 ingress_ingress_block_get(struct Qdisc *sch)
70{
71 struct ingress_sched_data *q = qdisc_priv(sch);
72
73 return q->block_info.block_index;
74}
75
76static int ingress_init(struct Qdisc *sch, struct nlattr *opt,
77 struct netlink_ext_ack *extack)
78{
79 struct ingress_sched_data *q = qdisc_priv(sch);
80 struct net_device *dev = qdisc_dev(sch);
81
82 net_inc_ingress_queue();
83
84 mini_qdisc_pair_init(&q->miniqp, sch, &dev->miniq_ingress);
85
86 q->block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
87 q->block_info.chain_head_change = clsact_chain_head_change;
88 q->block_info.chain_head_change_priv = &q->miniqp;
89
90 return tcf_block_get_ext(&q->block, sch, &q->block_info, extack);
91}
92
93static void ingress_destroy(struct Qdisc *sch)
94{
95 struct ingress_sched_data *q = qdisc_priv(sch);
96
97 tcf_block_put_ext(q->block, sch, &q->block_info);
98 net_dec_ingress_queue();
99}
100
101static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
102{
103 struct nlattr *nest;
104
105 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
106 if (nest == NULL)
107 goto nla_put_failure;
108
109 return nla_nest_end(skb, nest);
110
111nla_put_failure:
112 nla_nest_cancel(skb, nest);
113 return -1;
114}
115
116static const struct Qdisc_class_ops ingress_class_ops = {
117 .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED,
118 .leaf = ingress_leaf,
119 .find = ingress_find,
120 .walk = ingress_walk,
121 .tcf_block = ingress_tcf_block,
122 .bind_tcf = ingress_bind_filter,
123 .unbind_tcf = ingress_unbind_filter,
124};
125
126static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
127 .cl_ops = &ingress_class_ops,
128 .id = "ingress",
129 .priv_size = sizeof(struct ingress_sched_data),
130 .static_flags = TCQ_F_CPUSTATS,
131 .init = ingress_init,
132 .destroy = ingress_destroy,
133 .dump = ingress_dump,
134 .ingress_block_set = ingress_ingress_block_set,
135 .ingress_block_get = ingress_ingress_block_get,
136 .owner = THIS_MODULE,
137};
138
139struct clsact_sched_data {
140 struct tcf_block *ingress_block;
141 struct tcf_block *egress_block;
142 struct tcf_block_ext_info ingress_block_info;
143 struct tcf_block_ext_info egress_block_info;
144 struct mini_Qdisc_pair miniqp_ingress;
145 struct mini_Qdisc_pair miniqp_egress;
146};
147
148static unsigned long clsact_find(struct Qdisc *sch, u32 classid)
149{
150 switch (TC_H_MIN(classid)) {
151 case TC_H_MIN(TC_H_MIN_INGRESS):
152 case TC_H_MIN(TC_H_MIN_EGRESS):
153 return TC_H_MIN(classid);
154 default:
155 return 0;
156 }
157}
158
159static unsigned long clsact_bind_filter(struct Qdisc *sch,
160 unsigned long parent, u32 classid)
161{
162 return clsact_find(sch, classid);
163}
164
165static struct tcf_block *clsact_tcf_block(struct Qdisc *sch, unsigned long cl,
166 struct netlink_ext_ack *extack)
167{
168 struct clsact_sched_data *q = qdisc_priv(sch);
169
170 switch (cl) {
171 case TC_H_MIN(TC_H_MIN_INGRESS):
172 return q->ingress_block;
173 case TC_H_MIN(TC_H_MIN_EGRESS):
174 return q->egress_block;
175 default:
176 return NULL;
177 }
178}
179
180static void clsact_ingress_block_set(struct Qdisc *sch, u32 block_index)
181{
182 struct clsact_sched_data *q = qdisc_priv(sch);
183
184 q->ingress_block_info.block_index = block_index;
185}
186
187static void clsact_egress_block_set(struct Qdisc *sch, u32 block_index)
188{
189 struct clsact_sched_data *q = qdisc_priv(sch);
190
191 q->egress_block_info.block_index = block_index;
192}
193
194static u32 clsact_ingress_block_get(struct Qdisc *sch)
195{
196 struct clsact_sched_data *q = qdisc_priv(sch);
197
198 return q->ingress_block_info.block_index;
199}
200
201static u32 clsact_egress_block_get(struct Qdisc *sch)
202{
203 struct clsact_sched_data *q = qdisc_priv(sch);
204
205 return q->egress_block_info.block_index;
206}
207
208static int clsact_init(struct Qdisc *sch, struct nlattr *opt,
209 struct netlink_ext_ack *extack)
210{
211 struct clsact_sched_data *q = qdisc_priv(sch);
212 struct net_device *dev = qdisc_dev(sch);
213 int err;
214
215 net_inc_ingress_queue();
216 net_inc_egress_queue();
217
218 mini_qdisc_pair_init(&q->miniqp_ingress, sch, &dev->miniq_ingress);
219
220 q->ingress_block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
221 q->ingress_block_info.chain_head_change = clsact_chain_head_change;
222 q->ingress_block_info.chain_head_change_priv = &q->miniqp_ingress;
223
224 err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info,
225 extack);
226 if (err)
227 return err;
228
229 mini_qdisc_pair_init(&q->miniqp_egress, sch, &dev->miniq_egress);
230
231 q->egress_block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS;
232 q->egress_block_info.chain_head_change = clsact_chain_head_change;
233 q->egress_block_info.chain_head_change_priv = &q->miniqp_egress;
234
235 return tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info, extack);
236}
237
238static void clsact_destroy(struct Qdisc *sch)
239{
240 struct clsact_sched_data *q = qdisc_priv(sch);
241
242 tcf_block_put_ext(q->egress_block, sch, &q->egress_block_info);
243 tcf_block_put_ext(q->ingress_block, sch, &q->ingress_block_info);
244
245 net_dec_ingress_queue();
246 net_dec_egress_queue();
247}
248
249static const struct Qdisc_class_ops clsact_class_ops = {
250 .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED,
251 .leaf = ingress_leaf,
252 .find = clsact_find,
253 .walk = ingress_walk,
254 .tcf_block = clsact_tcf_block,
255 .bind_tcf = clsact_bind_filter,
256 .unbind_tcf = ingress_unbind_filter,
257};
258
259static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
260 .cl_ops = &clsact_class_ops,
261 .id = "clsact",
262 .priv_size = sizeof(struct clsact_sched_data),
263 .static_flags = TCQ_F_CPUSTATS,
264 .init = clsact_init,
265 .destroy = clsact_destroy,
266 .dump = ingress_dump,
267 .ingress_block_set = clsact_ingress_block_set,
268 .egress_block_set = clsact_egress_block_set,
269 .ingress_block_get = clsact_ingress_block_get,
270 .egress_block_get = clsact_egress_block_get,
271 .owner = THIS_MODULE,
272};
273
274static int __init ingress_module_init(void)
275{
276 int ret;
277
278 ret = register_qdisc(&ingress_qdisc_ops);
279 if (!ret) {
280 ret = register_qdisc(&clsact_qdisc_ops);
281 if (ret)
282 unregister_qdisc(&ingress_qdisc_ops);
283 }
284
285 return ret;
286}
287
288static void __exit ingress_module_exit(void)
289{
290 unregister_qdisc(&ingress_qdisc_ops);
291 unregister_qdisc(&clsact_qdisc_ops);
292}
293
294module_init(ingress_module_init);
295module_exit(ingress_module_exit);
296
297MODULE_ALIAS("sch_clsact");
298MODULE_LICENSE("GPL");