]>
Commit | Line | Data |
---|---|---|
bf3994d2 JP |
1 | /* |
2 | * net/sched/cls_matchll.c Match-all classifier | |
3 | * | |
4 | * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | ||
16 | #include <net/sch_generic.h> | |
17 | #include <net/pkt_cls.h> | |
18 | ||
fd62d9f5 | 19 | struct cls_mall_head { |
bf3994d2 JP |
20 | struct tcf_exts exts; |
21 | struct tcf_result res; | |
22 | u32 handle; | |
b87f7936 | 23 | u32 flags; |
df2735ee CW |
24 | union { |
25 | struct work_struct work; | |
26 | struct rcu_head rcu; | |
27 | }; | |
bf3994d2 JP |
28 | }; |
29 | ||
30 | static int mall_classify(struct sk_buff *skb, const struct tcf_proto *tp, | |
31 | struct tcf_result *res) | |
32 | { | |
33 | struct cls_mall_head *head = rcu_dereference_bh(tp->root); | |
bf3994d2 | 34 | |
fd62d9f5 | 35 | if (tc_skip_sw(head->flags)) |
b87f7936 YG |
36 | return -1; |
37 | ||
3ff4cbec | 38 | *res = head->res; |
fd62d9f5 | 39 | return tcf_exts_exec(skb, &head->exts, res); |
bf3994d2 JP |
40 | } |
41 | ||
42 | static int mall_init(struct tcf_proto *tp) | |
43 | { | |
bf3994d2 JP |
44 | return 0; |
45 | } | |
46 | ||
57767e78 CW |
47 | static void __mall_destroy(struct cls_mall_head *head) |
48 | { | |
49 | tcf_exts_destroy(&head->exts); | |
50 | tcf_exts_put_net(&head->exts); | |
51 | kfree(head); | |
52 | } | |
53 | ||
df2735ee CW |
54 | static void mall_destroy_work(struct work_struct *work) |
55 | { | |
56 | struct cls_mall_head *head = container_of(work, struct cls_mall_head, | |
57 | work); | |
58 | rtnl_lock(); | |
57767e78 | 59 | __mall_destroy(head); |
df2735ee CW |
60 | rtnl_unlock(); |
61 | } | |
62 | ||
fd62d9f5 | 63 | static void mall_destroy_rcu(struct rcu_head *rcu) |
bf3994d2 | 64 | { |
fd62d9f5 YG |
65 | struct cls_mall_head *head = container_of(rcu, struct cls_mall_head, |
66 | rcu); | |
bf3994d2 | 67 | |
df2735ee CW |
68 | INIT_WORK(&head->work, mall_destroy_work); |
69 | tcf_queue_work(&head->work); | |
bf3994d2 JP |
70 | } |
71 | ||
2447a96f JP |
72 | static void mall_destroy_hw_filter(struct tcf_proto *tp, |
73 | struct cls_mall_head *head, | |
74 | unsigned long cookie) | |
b87f7936 | 75 | { |
de4784ca | 76 | struct tc_cls_matchall_offload cls_mall = {}; |
2447a96f | 77 | struct tcf_block *block = tp->chain->block; |
b87f7936 | 78 | |
de4784ca | 79 | tc_cls_common_offload_init(&cls_mall.common, tp); |
2447a96f | 80 | cls_mall.command = TC_CLSMATCHALL_DESTROY; |
de4784ca | 81 | cls_mall.cookie = cookie; |
b87f7936 | 82 | |
2447a96f | 83 | tc_setup_cb_call(block, NULL, TC_SETUP_CLSMATCHALL, &cls_mall, false); |
b87f7936 YG |
84 | } |
85 | ||
2447a96f JP |
86 | static int mall_replace_hw_filter(struct tcf_proto *tp, |
87 | struct cls_mall_head *head, | |
88 | unsigned long cookie) | |
b87f7936 | 89 | { |
de4784ca | 90 | struct tc_cls_matchall_offload cls_mall = {}; |
2447a96f JP |
91 | struct tcf_block *block = tp->chain->block; |
92 | bool skip_sw = tc_skip_sw(head->flags); | |
93 | int err; | |
b87f7936 | 94 | |
de4784ca | 95 | tc_cls_common_offload_init(&cls_mall.common, tp); |
2447a96f JP |
96 | cls_mall.command = TC_CLSMATCHALL_REPLACE; |
97 | cls_mall.exts = &head->exts; | |
de4784ca | 98 | cls_mall.cookie = cookie; |
b87f7936 | 99 | |
2447a96f JP |
100 | err = tc_setup_cb_call(block, NULL, TC_SETUP_CLSMATCHALL, |
101 | &cls_mall, skip_sw); | |
102 | if (err < 0) { | |
103 | mall_destroy_hw_filter(tp, head, cookie); | |
104 | return err; | |
105 | } else if (err > 0) { | |
106 | head->flags |= TCA_CLS_FLAGS_IN_HW; | |
107 | } | |
108 | ||
109 | if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW)) | |
110 | return -EINVAL; | |
111 | ||
112 | return 0; | |
b87f7936 YG |
113 | } |
114 | ||
763dbf63 | 115 | static void mall_destroy(struct tcf_proto *tp) |
bf3994d2 JP |
116 | { |
117 | struct cls_mall_head *head = rtnl_dereference(tp->root); | |
118 | ||
fd62d9f5 | 119 | if (!head) |
763dbf63 | 120 | return; |
bf3994d2 | 121 | |
2447a96f | 122 | if (!tc_skip_hw(head->flags)) |
fd62d9f5 | 123 | mall_destroy_hw_filter(tp, head, (unsigned long) head); |
b87f7936 | 124 | |
57767e78 CW |
125 | if (tcf_exts_get_net(&head->exts)) |
126 | call_rcu(&head->rcu, mall_destroy_rcu); | |
127 | else | |
128 | __mall_destroy(head); | |
bf3994d2 JP |
129 | } |
130 | ||
8113c095 | 131 | static void *mall_get(struct tcf_proto *tp, u32 handle) |
bf3994d2 | 132 | { |
8113c095 | 133 | return NULL; |
bf3994d2 JP |
134 | } |
135 | ||
136 | static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = { | |
137 | [TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC }, | |
138 | [TCA_MATCHALL_CLASSID] = { .type = NLA_U32 }, | |
139 | }; | |
140 | ||
141 | static int mall_set_parms(struct net *net, struct tcf_proto *tp, | |
fd62d9f5 | 142 | struct cls_mall_head *head, |
bf3994d2 JP |
143 | unsigned long base, struct nlattr **tb, |
144 | struct nlattr *est, bool ovr) | |
145 | { | |
bf3994d2 JP |
146 | int err; |
147 | ||
a74cb369 | 148 | err = tcf_exts_validate(net, tp, tb, est, &head->exts, ovr); |
bf3994d2 | 149 | if (err < 0) |
a74cb369 | 150 | return err; |
bf3994d2 JP |
151 | |
152 | if (tb[TCA_MATCHALL_CLASSID]) { | |
fd62d9f5 YG |
153 | head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]); |
154 | tcf_bind_filter(tp, &head->res, base); | |
bf3994d2 | 155 | } |
bf3994d2 JP |
156 | return 0; |
157 | } | |
158 | ||
159 | static int mall_change(struct net *net, struct sk_buff *in_skb, | |
160 | struct tcf_proto *tp, unsigned long base, | |
161 | u32 handle, struct nlattr **tca, | |
8113c095 | 162 | void **arg, bool ovr) |
bf3994d2 JP |
163 | { |
164 | struct cls_mall_head *head = rtnl_dereference(tp->root); | |
bf3994d2 | 165 | struct nlattr *tb[TCA_MATCHALL_MAX + 1]; |
fd62d9f5 | 166 | struct cls_mall_head *new; |
b87f7936 | 167 | u32 flags = 0; |
bf3994d2 JP |
168 | int err; |
169 | ||
170 | if (!tca[TCA_OPTIONS]) | |
171 | return -EINVAL; | |
172 | ||
fd62d9f5 YG |
173 | if (head) |
174 | return -EEXIST; | |
bf3994d2 | 175 | |
fceb6435 JB |
176 | err = nla_parse_nested(tb, TCA_MATCHALL_MAX, tca[TCA_OPTIONS], |
177 | mall_policy, NULL); | |
bf3994d2 JP |
178 | if (err < 0) |
179 | return err; | |
180 | ||
b87f7936 YG |
181 | if (tb[TCA_MATCHALL_FLAGS]) { |
182 | flags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]); | |
183 | if (!tc_flags_valid(flags)) | |
184 | return -EINVAL; | |
185 | } | |
186 | ||
fd62d9f5 YG |
187 | new = kzalloc(sizeof(*new), GFP_KERNEL); |
188 | if (!new) | |
bf3994d2 JP |
189 | return -ENOBUFS; |
190 | ||
e2160156 | 191 | err = tcf_exts_init(&new->exts, TCA_MATCHALL_ACT, 0); |
ec2507d2 YG |
192 | if (err) |
193 | goto err_exts_init; | |
bf3994d2 JP |
194 | |
195 | if (!handle) | |
196 | handle = 1; | |
fd62d9f5 YG |
197 | new->handle = handle; |
198 | new->flags = flags; | |
bf3994d2 | 199 | |
fd62d9f5 | 200 | err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], ovr); |
bf3994d2 | 201 | if (err) |
ec2507d2 | 202 | goto err_set_parms; |
bf3994d2 | 203 | |
2447a96f | 204 | if (!tc_skip_hw(new->flags)) { |
fd62d9f5 | 205 | err = mall_replace_hw_filter(tp, new, (unsigned long) new); |
2447a96f JP |
206 | if (err) |
207 | goto err_replace_hw_filter; | |
b87f7936 | 208 | } |
c7d2b2f5 OG |
209 | |
210 | if (!tc_in_hw(new->flags)) | |
211 | new->flags |= TCA_CLS_FLAGS_NOT_IN_HW; | |
b87f7936 | 212 | |
8113c095 | 213 | *arg = head; |
fd62d9f5 | 214 | rcu_assign_pointer(tp->root, new); |
bf3994d2 JP |
215 | return 0; |
216 | ||
ec2507d2 YG |
217 | err_replace_hw_filter: |
218 | err_set_parms: | |
e2160156 | 219 | tcf_exts_destroy(&new->exts); |
ec2507d2 | 220 | err_exts_init: |
fd62d9f5 | 221 | kfree(new); |
bf3994d2 JP |
222 | return err; |
223 | } | |
224 | ||
8113c095 | 225 | static int mall_delete(struct tcf_proto *tp, void *arg, bool *last) |
bf3994d2 | 226 | { |
fd62d9f5 | 227 | return -EOPNOTSUPP; |
bf3994d2 JP |
228 | } |
229 | ||
230 | static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
231 | { | |
232 | struct cls_mall_head *head = rtnl_dereference(tp->root); | |
bf3994d2 JP |
233 | |
234 | if (arg->count < arg->skip) | |
235 | goto skip; | |
8113c095 | 236 | if (arg->fn(tp, head, arg) < 0) |
bf3994d2 JP |
237 | arg->stop = 1; |
238 | skip: | |
239 | arg->count++; | |
240 | } | |
241 | ||
8113c095 | 242 | static int mall_dump(struct net *net, struct tcf_proto *tp, void *fh, |
bf3994d2 JP |
243 | struct sk_buff *skb, struct tcmsg *t) |
244 | { | |
8113c095 | 245 | struct cls_mall_head *head = fh; |
bf3994d2 JP |
246 | struct nlattr *nest; |
247 | ||
fd62d9f5 | 248 | if (!head) |
bf3994d2 JP |
249 | return skb->len; |
250 | ||
fd62d9f5 | 251 | t->tcm_handle = head->handle; |
bf3994d2 JP |
252 | |
253 | nest = nla_nest_start(skb, TCA_OPTIONS); | |
254 | if (!nest) | |
255 | goto nla_put_failure; | |
256 | ||
fd62d9f5 YG |
257 | if (head->res.classid && |
258 | nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid)) | |
bf3994d2 JP |
259 | goto nla_put_failure; |
260 | ||
7a335ada OG |
261 | if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags)) |
262 | goto nla_put_failure; | |
263 | ||
fd62d9f5 | 264 | if (tcf_exts_dump(skb, &head->exts)) |
bf3994d2 JP |
265 | goto nla_put_failure; |
266 | ||
267 | nla_nest_end(skb, nest); | |
268 | ||
fd62d9f5 | 269 | if (tcf_exts_dump_stats(skb, &head->exts) < 0) |
bf3994d2 JP |
270 | goto nla_put_failure; |
271 | ||
272 | return skb->len; | |
273 | ||
274 | nla_put_failure: | |
275 | nla_nest_cancel(skb, nest); | |
276 | return -1; | |
277 | } | |
278 | ||
07d79fc7 CW |
279 | static void mall_bind_class(void *fh, u32 classid, unsigned long cl) |
280 | { | |
281 | struct cls_mall_head *head = fh; | |
282 | ||
283 | if (head && head->res.classid == classid) | |
284 | head->res.class = cl; | |
285 | } | |
286 | ||
bf3994d2 JP |
287 | static struct tcf_proto_ops cls_mall_ops __read_mostly = { |
288 | .kind = "matchall", | |
289 | .classify = mall_classify, | |
290 | .init = mall_init, | |
291 | .destroy = mall_destroy, | |
292 | .get = mall_get, | |
293 | .change = mall_change, | |
294 | .delete = mall_delete, | |
295 | .walk = mall_walk, | |
296 | .dump = mall_dump, | |
07d79fc7 | 297 | .bind_class = mall_bind_class, |
bf3994d2 JP |
298 | .owner = THIS_MODULE, |
299 | }; | |
300 | ||
301 | static int __init cls_mall_init(void) | |
302 | { | |
303 | return register_tcf_proto_ops(&cls_mall_ops); | |
304 | } | |
305 | ||
306 | static void __exit cls_mall_exit(void) | |
307 | { | |
308 | unregister_tcf_proto_ops(&cls_mall_ops); | |
309 | } | |
310 | ||
311 | module_init(cls_mall_init); | |
312 | module_exit(cls_mall_exit); | |
313 | ||
314 | MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); | |
315 | MODULE_DESCRIPTION("Match-all classifier"); | |
316 | MODULE_LICENSE("GPL v2"); |