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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1f211a1b | 2 | /* net/sched/sch_ingress.c - Ingress and clsact qdisc |
1da177e4 LT |
3 | * |
4 | * Authors: Jamal Hadi Salim 1999 | |
5 | */ | |
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/types.h> | |
0ba48053 | 9 | #include <linux/list.h> |
1da177e4 | 10 | #include <linux/skbuff.h> |
1da177e4 | 11 | #include <linux/rtnetlink.h> |
d2788d34 | 12 | |
dc5fc579 | 13 | #include <net/netlink.h> |
1da177e4 | 14 | #include <net/pkt_sched.h> |
cf1facda | 15 | #include <net/pkt_cls.h> |
1da177e4 | 16 | |
6529eaba JP |
17 | struct ingress_sched_data { |
18 | struct tcf_block *block; | |
6e40cf2d | 19 | struct tcf_block_ext_info block_info; |
46209401 | 20 | struct mini_Qdisc_pair miniqp; |
6529eaba JP |
21 | }; |
22 | ||
1da177e4 LT |
23 | static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg) |
24 | { | |
25 | return NULL; | |
26 | } | |
27 | ||
143976ce | 28 | static unsigned long ingress_find(struct Qdisc *sch, u32 classid) |
1da177e4 | 29 | { |
1da177e4 LT |
30 | return TC_H_MIN(classid) + 1; |
31 | } | |
32 | ||
1da177e4 | 33 | static unsigned long ingress_bind_filter(struct Qdisc *sch, |
58f4df42 | 34 | unsigned long parent, u32 classid) |
1da177e4 | 35 | { |
143976ce | 36 | return ingress_find(sch, classid); |
1da177e4 LT |
37 | } |
38 | ||
143976ce | 39 | static void ingress_unbind_filter(struct Qdisc *sch, unsigned long cl) |
1da177e4 LT |
40 | { |
41 | } | |
42 | ||
58f4df42 | 43 | static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
1da177e4 | 44 | { |
1da177e4 LT |
45 | } |
46 | ||
cbaacc4e AA |
47 | static struct tcf_block *ingress_tcf_block(struct Qdisc *sch, unsigned long cl, |
48 | struct netlink_ext_ack *extack) | |
1da177e4 | 49 | { |
6529eaba | 50 | struct ingress_sched_data *q = qdisc_priv(sch); |
1da177e4 | 51 | |
6529eaba | 52 | return q->block; |
1da177e4 LT |
53 | } |
54 | ||
c7eb7d72 JP |
55 | static void clsact_chain_head_change(struct tcf_proto *tp_head, void *priv) |
56 | { | |
46209401 | 57 | struct mini_Qdisc_pair *miniqp = priv; |
c7eb7d72 | 58 | |
46209401 | 59 | mini_qdisc_pair_swap(miniqp, tp_head); |
51ab2994 JP |
60 | }; |
61 | ||
62 | static 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 | ||
69 | static 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; | |
c7eb7d72 JP |
74 | } |
75 | ||
e63d7dfd AA |
76 | static int ingress_init(struct Qdisc *sch, struct nlattr *opt, |
77 | struct netlink_ext_ack *extack) | |
4577139b | 78 | { |
6529eaba JP |
79 | struct ingress_sched_data *q = qdisc_priv(sch); |
80 | struct net_device *dev = qdisc_dev(sch); | |
7d17c544 | 81 | int err; |
6529eaba | 82 | |
b59e6979 JP |
83 | net_inc_ingress_queue(); |
84 | ||
46209401 JP |
85 | mini_qdisc_pair_init(&q->miniqp, sch, &dev->miniq_ingress); |
86 | ||
32f8c409 | 87 | q->block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS; |
c7eb7d72 | 88 | q->block_info.chain_head_change = clsact_chain_head_change; |
46209401 | 89 | q->block_info.chain_head_change_priv = &q->miniqp; |
6e40cf2d | 90 | |
7d17c544 PB |
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; | |
4577139b DB |
98 | } |
99 | ||
1da177e4 LT |
100 | static void ingress_destroy(struct Qdisc *sch) |
101 | { | |
6529eaba | 102 | struct ingress_sched_data *q = qdisc_priv(sch); |
1da177e4 | 103 | |
c7eb7d72 | 104 | tcf_block_put_ext(q->block, sch, &q->block_info); |
4577139b | 105 | net_dec_ingress_queue(); |
1da177e4 LT |
106 | } |
107 | ||
1da177e4 LT |
108 | static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb) |
109 | { | |
4b3550ef | 110 | struct nlattr *nest; |
1da177e4 | 111 | |
ae0be8de | 112 | nest = nla_nest_start_noflag(skb, TCA_OPTIONS); |
4b3550ef PM |
113 | if (nest == NULL) |
114 | goto nla_put_failure; | |
d2788d34 | 115 | |
d59b7d80 | 116 | return nla_nest_end(skb, nest); |
1da177e4 | 117 | |
1e90474c | 118 | nla_put_failure: |
4b3550ef | 119 | nla_nest_cancel(skb, nest); |
1da177e4 LT |
120 | return -1; |
121 | } | |
122 | ||
20fea08b | 123 | static const struct Qdisc_class_ops ingress_class_ops = { |
7a096d57 | 124 | .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED, |
1da177e4 | 125 | .leaf = ingress_leaf, |
143976ce | 126 | .find = ingress_find, |
1da177e4 | 127 | .walk = ingress_walk, |
6529eaba | 128 | .tcf_block = ingress_tcf_block, |
1da177e4 | 129 | .bind_tcf = ingress_bind_filter, |
143976ce | 130 | .unbind_tcf = ingress_unbind_filter, |
1da177e4 LT |
131 | }; |
132 | ||
20fea08b | 133 | static struct Qdisc_ops ingress_qdisc_ops __read_mostly = { |
51ab2994 JP |
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, | |
1da177e4 LT |
144 | }; |
145 | ||
6529eaba JP |
146 | struct clsact_sched_data { |
147 | struct tcf_block *ingress_block; | |
148 | struct tcf_block *egress_block; | |
6e40cf2d JP |
149 | struct tcf_block_ext_info ingress_block_info; |
150 | struct tcf_block_ext_info egress_block_info; | |
46209401 JP |
151 | struct mini_Qdisc_pair miniqp_ingress; |
152 | struct mini_Qdisc_pair miniqp_egress; | |
6529eaba JP |
153 | }; |
154 | ||
143976ce | 155 | static unsigned long clsact_find(struct Qdisc *sch, u32 classid) |
1f211a1b DB |
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 | ||
166 | static unsigned long clsact_bind_filter(struct Qdisc *sch, | |
167 | unsigned long parent, u32 classid) | |
168 | { | |
143976ce | 169 | return clsact_find(sch, classid); |
1f211a1b DB |
170 | } |
171 | ||
cbaacc4e AA |
172 | static struct tcf_block *clsact_tcf_block(struct Qdisc *sch, unsigned long cl, |
173 | struct netlink_ext_ack *extack) | |
1f211a1b | 174 | { |
6529eaba | 175 | struct clsact_sched_data *q = qdisc_priv(sch); |
1f211a1b DB |
176 | |
177 | switch (cl) { | |
178 | case TC_H_MIN(TC_H_MIN_INGRESS): | |
6529eaba | 179 | return q->ingress_block; |
1f211a1b | 180 | case TC_H_MIN(TC_H_MIN_EGRESS): |
6529eaba | 181 | return q->egress_block; |
1f211a1b DB |
182 | default: |
183 | return NULL; | |
184 | } | |
185 | } | |
186 | ||
51ab2994 JP |
187 | static 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 | ||
194 | static 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 | ||
201 | static 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 | ||
208 | static 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 | ||
e63d7dfd AA |
215 | static int clsact_init(struct Qdisc *sch, struct nlattr *opt, |
216 | struct netlink_ext_ack *extack) | |
1f211a1b | 217 | { |
6529eaba JP |
218 | struct clsact_sched_data *q = qdisc_priv(sch); |
219 | struct net_device *dev = qdisc_dev(sch); | |
220 | int err; | |
221 | ||
b59e6979 JP |
222 | net_inc_ingress_queue(); |
223 | net_inc_egress_queue(); | |
224 | ||
46209401 JP |
225 | mini_qdisc_pair_init(&q->miniqp_ingress, sch, &dev->miniq_ingress); |
226 | ||
32f8c409 | 227 | q->ingress_block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS; |
c7eb7d72 | 228 | q->ingress_block_info.chain_head_change = clsact_chain_head_change; |
46209401 | 229 | q->ingress_block_info.chain_head_change_priv = &q->miniqp_ingress; |
6e40cf2d | 230 | |
8d1a77f9 AA |
231 | err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info, |
232 | extack); | |
6529eaba JP |
233 | if (err) |
234 | return err; | |
235 | ||
7d17c544 PB |
236 | mini_qdisc_pair_block_init(&q->miniqp_ingress, q->ingress_block); |
237 | ||
46209401 JP |
238 | mini_qdisc_pair_init(&q->miniqp_egress, sch, &dev->miniq_egress); |
239 | ||
32f8c409 | 240 | q->egress_block_info.binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS; |
c7eb7d72 | 241 | q->egress_block_info.chain_head_change = clsact_chain_head_change; |
46209401 | 242 | q->egress_block_info.chain_head_change_priv = &q->miniqp_egress; |
6e40cf2d | 243 | |
c02b3741 | 244 | return tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info, extack); |
1f211a1b DB |
245 | } |
246 | ||
247 | static void clsact_destroy(struct Qdisc *sch) | |
248 | { | |
6529eaba | 249 | struct clsact_sched_data *q = qdisc_priv(sch); |
1f211a1b | 250 | |
c7eb7d72 JP |
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); | |
1f211a1b DB |
253 | |
254 | net_dec_ingress_queue(); | |
255 | net_dec_egress_queue(); | |
256 | } | |
257 | ||
258 | static const struct Qdisc_class_ops clsact_class_ops = { | |
87f37392 | 259 | .flags = QDISC_CLASS_OPS_DOIT_UNLOCKED, |
1f211a1b | 260 | .leaf = ingress_leaf, |
143976ce | 261 | .find = clsact_find, |
1f211a1b | 262 | .walk = ingress_walk, |
6529eaba | 263 | .tcf_block = clsact_tcf_block, |
1f211a1b | 264 | .bind_tcf = clsact_bind_filter, |
143976ce | 265 | .unbind_tcf = ingress_unbind_filter, |
1f211a1b DB |
266 | }; |
267 | ||
268 | static struct Qdisc_ops clsact_qdisc_ops __read_mostly = { | |
51ab2994 JP |
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, | |
1f211a1b DB |
281 | }; |
282 | ||
1da177e4 LT |
283 | static int __init ingress_module_init(void) |
284 | { | |
1f211a1b DB |
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; | |
1da177e4 | 295 | } |
58f4df42 | 296 | |
10297b99 | 297 | static void __exit ingress_module_exit(void) |
1da177e4 LT |
298 | { |
299 | unregister_qdisc(&ingress_qdisc_ops); | |
1f211a1b | 300 | unregister_qdisc(&clsact_qdisc_ops); |
1da177e4 | 301 | } |
58f4df42 | 302 | |
d2788d34 DB |
303 | module_init(ingress_module_init); |
304 | module_exit(ingress_module_exit); | |
305 | ||
1f211a1b | 306 | MODULE_ALIAS("sch_clsact"); |
1da177e4 | 307 | MODULE_LICENSE("GPL"); |