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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 int err;
82
83 net_inc_ingress_queue();
84
85 mini_qdisc_pair_init(&q->miniqp, sch, &dev->miniq_ingress);
86
87 q->block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
88 q->block_info.chain_head_change = clsact_chain_head_change;
89 q->block_info.chain_head_change_priv = &q->miniqp;
90
91 err = tcf_block_get_ext(&q->block, sch, &q->block_info, extack);
92 if (err)
93 return err;
94
95 mini_qdisc_pair_block_init(&q->miniqp, q->block);
96
97 return 0;
98}
99
100static void ingress_destroy(struct Qdisc *sch)
101{
102 struct ingress_sched_data *q = qdisc_priv(sch);
103
104 tcf_block_put_ext(q->block, sch, &q->block_info);
105 net_dec_ingress_queue();
106}
107
108static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
109{
110 struct nlattr *nest;
111
112 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
113 if (nest == NULL)
114 goto nla_put_failure;
115
116 return nla_nest_end(skb, nest);
117
118nla_put_failure:
119 nla_nest_cancel(skb, nest);
120 return -1;
121}
122
123static const struct Qdisc_class_ops ingress_class_ops = {
124 .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED,
125 .leaf = ingress_leaf,
126 .find = ingress_find,
127 .walk = ingress_walk,
128 .tcf_block = ingress_tcf_block,
129 .bind_tcf = ingress_bind_filter,
130 .unbind_tcf = ingress_unbind_filter,
131};
132
133static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
134 .cl_ops = &ingress_class_ops,
135 .id = "ingress",
136 .priv_size = sizeof(struct ingress_sched_data),
137 .static_flags = TCQ_F_CPUSTATS,
138 .init = ingress_init,
139 .destroy = ingress_destroy,
140 .dump = ingress_dump,
141 .ingress_block_set = ingress_ingress_block_set,
142 .ingress_block_get = ingress_ingress_block_get,
143 .owner = THIS_MODULE,
144};
145
146struct clsact_sched_data {
147 struct tcf_block *ingress_block;
148 struct tcf_block *egress_block;
149 struct tcf_block_ext_info ingress_block_info;
150 struct tcf_block_ext_info egress_block_info;
151 struct mini_Qdisc_pair miniqp_ingress;
152 struct mini_Qdisc_pair miniqp_egress;
153};
154
155static unsigned long clsact_find(struct Qdisc *sch, u32 classid)
156{
157 switch (TC_H_MIN(classid)) {
158 case TC_H_MIN(TC_H_MIN_INGRESS):
159 case TC_H_MIN(TC_H_MIN_EGRESS):
160 return TC_H_MIN(classid);
161 default:
162 return 0;
163 }
164}
165
166static unsigned long clsact_bind_filter(struct Qdisc *sch,
167 unsigned long parent, u32 classid)
168{
169 return clsact_find(sch, classid);
170}
171
172static struct tcf_block *clsact_tcf_block(struct Qdisc *sch, unsigned long cl,
173 struct netlink_ext_ack *extack)
174{
175 struct clsact_sched_data *q = qdisc_priv(sch);
176
177 switch (cl) {
178 case TC_H_MIN(TC_H_MIN_INGRESS):
179 return q->ingress_block;
180 case TC_H_MIN(TC_H_MIN_EGRESS):
181 return q->egress_block;
182 default:
183 return NULL;
184 }
185}
186
187static void clsact_ingress_block_set(struct Qdisc *sch, u32 block_index)
188{
189 struct clsact_sched_data *q = qdisc_priv(sch);
190
191 q->ingress_block_info.block_index = block_index;
192}
193
194static void clsact_egress_block_set(struct Qdisc *sch, u32 block_index)
195{
196 struct clsact_sched_data *q = qdisc_priv(sch);
197
198 q->egress_block_info.block_index = block_index;
199}
200
201static u32 clsact_ingress_block_get(struct Qdisc *sch)
202{
203 struct clsact_sched_data *q = qdisc_priv(sch);
204
205 return q->ingress_block_info.block_index;
206}
207
208static u32 clsact_egress_block_get(struct Qdisc *sch)
209{
210 struct clsact_sched_data *q = qdisc_priv(sch);
211
212 return q->egress_block_info.block_index;
213}
214
215static int clsact_init(struct Qdisc *sch, struct nlattr *opt,
216 struct netlink_ext_ack *extack)
217{
218 struct clsact_sched_data *q = qdisc_priv(sch);
219 struct net_device *dev = qdisc_dev(sch);
220 int err;
221
222 net_inc_ingress_queue();
223 net_inc_egress_queue();
224
225 mini_qdisc_pair_init(&q->miniqp_ingress, sch, &dev->miniq_ingress);
226
227 q->ingress_block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
228 q->ingress_block_info.chain_head_change = clsact_chain_head_change;
229 q->ingress_block_info.chain_head_change_priv = &q->miniqp_ingress;
230
231 err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info,
232 extack);
233 if (err)
234 return err;
235
236 mini_qdisc_pair_block_init(&q->miniqp_ingress, q->ingress_block);
237
238 mini_qdisc_pair_init(&q->miniqp_egress, sch, &dev->miniq_egress);
239
240 q->egress_block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS;
241 q->egress_block_info.chain_head_change = clsact_chain_head_change;
242 q->egress_block_info.chain_head_change_priv = &q->miniqp_egress;
243
244 return tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info, extack);
245}
246
247static void clsact_destroy(struct Qdisc *sch)
248{
249 struct clsact_sched_data *q = qdisc_priv(sch);
250
251 tcf_block_put_ext(q->egress_block, sch, &q->egress_block_info);
252 tcf_block_put_ext(q->ingress_block, sch, &q->ingress_block_info);
253
254 net_dec_ingress_queue();
255 net_dec_egress_queue();
256}
257
258static const struct Qdisc_class_ops clsact_class_ops = {
259 .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED,
260 .leaf = ingress_leaf,
261 .find = clsact_find,
262 .walk = ingress_walk,
263 .tcf_block = clsact_tcf_block,
264 .bind_tcf = clsact_bind_filter,
265 .unbind_tcf = ingress_unbind_filter,
266};
267
268static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
269 .cl_ops = &clsact_class_ops,
270 .id = "clsact",
271 .priv_size = sizeof(struct clsact_sched_data),
272 .static_flags = TCQ_F_CPUSTATS,
273 .init = clsact_init,
274 .destroy = clsact_destroy,
275 .dump = ingress_dump,
276 .ingress_block_set = clsact_ingress_block_set,
277 .egress_block_set = clsact_egress_block_set,
278 .ingress_block_get = clsact_ingress_block_get,
279 .egress_block_get = clsact_egress_block_get,
280 .owner = THIS_MODULE,
281};
282
283static int __init ingress_module_init(void)
284{
285 int ret;
286
287 ret = register_qdisc(&ingress_qdisc_ops);
288 if (!ret) {
289 ret = register_qdisc(&clsact_qdisc_ops);
290 if (ret)
291 unregister_qdisc(&ingress_qdisc_ops);
292 }
293
294 return ret;
295}
296
297static void __exit ingress_module_exit(void)
298{
299 unregister_qdisc(&ingress_qdisc_ops);
300 unregister_qdisc(&clsact_qdisc_ops);
301}
302
303module_init(ingress_module_init);
304module_exit(ingress_module_exit);
305
306MODULE_ALIAS("sch_clsact");
307MODULE_LICENSE("GPL");
308
