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sched: cls_flower: fix panic on filter replace
[mirror_ubuntu-zesty-kernel.git] / net / sched / cls_flower.c
1 /*
2 * net/sched/cls_flower.c Flower classifier
3 *
4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
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 #include <linux/rhashtable.h>
16
17 #include <linux/if_ether.h>
18 #include <linux/in6.h>
19 #include <linux/ip.h>
20
21 #include <net/sch_generic.h>
22 #include <net/pkt_cls.h>
23 #include <net/ip.h>
24 #include <net/flow_dissector.h>
25
26 struct fl_flow_key {
27 int indev_ifindex;
28 struct flow_dissector_key_control control;
29 struct flow_dissector_key_basic basic;
30 struct flow_dissector_key_eth_addrs eth;
31 struct flow_dissector_key_addrs ipaddrs;
32 union {
33 struct flow_dissector_key_ipv4_addrs ipv4;
34 struct flow_dissector_key_ipv6_addrs ipv6;
35 };
36 struct flow_dissector_key_ports tp;
37 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
38
39 struct fl_flow_mask_range {
40 unsigned short int start;
41 unsigned short int end;
42 };
43
44 struct fl_flow_mask {
45 struct fl_flow_key key;
46 struct fl_flow_mask_range range;
47 struct rcu_head rcu;
48 };
49
50 struct cls_fl_head {
51 struct rhashtable ht;
52 struct fl_flow_mask mask;
53 struct flow_dissector dissector;
54 u32 hgen;
55 bool mask_assigned;
56 struct list_head filters;
57 struct rhashtable_params ht_params;
58 struct rcu_head rcu;
59 };
60
61 struct cls_fl_filter {
62 struct rhash_head ht_node;
63 struct fl_flow_key mkey;
64 struct tcf_exts exts;
65 struct tcf_result res;
66 struct fl_flow_key key;
67 struct list_head list;
68 u32 handle;
69 struct rcu_head rcu;
70 };
71
72 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
73 {
74 return mask->range.end - mask->range.start;
75 }
76
77 static void fl_mask_update_range(struct fl_flow_mask *mask)
78 {
79 const u8 *bytes = (const u8 *) &mask->key;
80 size_t size = sizeof(mask->key);
81 size_t i, first = 0, last = size - 1;
82
83 for (i = 0; i < sizeof(mask->key); i++) {
84 if (bytes[i]) {
85 if (!first && i)
86 first = i;
87 last = i;
88 }
89 }
90 mask->range.start = rounddown(first, sizeof(long));
91 mask->range.end = roundup(last + 1, sizeof(long));
92 }
93
94 static void *fl_key_get_start(struct fl_flow_key *key,
95 const struct fl_flow_mask *mask)
96 {
97 return (u8 *) key + mask->range.start;
98 }
99
100 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
101 struct fl_flow_mask *mask)
102 {
103 const long *lkey = fl_key_get_start(key, mask);
104 const long *lmask = fl_key_get_start(&mask->key, mask);
105 long *lmkey = fl_key_get_start(mkey, mask);
106 int i;
107
108 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
109 *lmkey++ = *lkey++ & *lmask++;
110 }
111
112 static void fl_clear_masked_range(struct fl_flow_key *key,
113 struct fl_flow_mask *mask)
114 {
115 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
116 }
117
118 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
119 struct tcf_result *res)
120 {
121 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
122 struct cls_fl_filter *f;
123 struct fl_flow_key skb_key;
124 struct fl_flow_key skb_mkey;
125
126 fl_clear_masked_range(&skb_key, &head->mask);
127 skb_key.indev_ifindex = skb->skb_iif;
128 /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
129 * so do it rather here.
130 */
131 skb_key.basic.n_proto = skb->protocol;
132 skb_flow_dissect(skb, &head->dissector, &skb_key);
133
134 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
135
136 f = rhashtable_lookup_fast(&head->ht,
137 fl_key_get_start(&skb_mkey, &head->mask),
138 head->ht_params);
139 if (f) {
140 *res = f->res;
141 return tcf_exts_exec(skb, &f->exts, res);
142 }
143 return -1;
144 }
145
146 static int fl_init(struct tcf_proto *tp)
147 {
148 struct cls_fl_head *head;
149
150 head = kzalloc(sizeof(*head), GFP_KERNEL);
151 if (!head)
152 return -ENOBUFS;
153
154 INIT_LIST_HEAD_RCU(&head->filters);
155 rcu_assign_pointer(tp->root, head);
156
157 return 0;
158 }
159
160 static void fl_destroy_filter(struct rcu_head *head)
161 {
162 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
163
164 tcf_exts_destroy(&f->exts);
165 kfree(f);
166 }
167
168 static bool fl_destroy(struct tcf_proto *tp, bool force)
169 {
170 struct cls_fl_head *head = rtnl_dereference(tp->root);
171 struct cls_fl_filter *f, *next;
172
173 if (!force && !list_empty(&head->filters))
174 return false;
175
176 list_for_each_entry_safe(f, next, &head->filters, list) {
177 list_del_rcu(&f->list);
178 call_rcu(&f->rcu, fl_destroy_filter);
179 }
180 RCU_INIT_POINTER(tp->root, NULL);
181 if (head->mask_assigned)
182 rhashtable_destroy(&head->ht);
183 kfree_rcu(head, rcu);
184 return true;
185 }
186
187 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
188 {
189 struct cls_fl_head *head = rtnl_dereference(tp->root);
190 struct cls_fl_filter *f;
191
192 list_for_each_entry(f, &head->filters, list)
193 if (f->handle == handle)
194 return (unsigned long) f;
195 return 0;
196 }
197
198 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
199 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
200 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
201 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
202 .len = IFNAMSIZ },
203 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
204 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
205 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
206 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
207 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
208 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
209 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
210 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
211 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
212 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
213 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
214 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
215 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
216 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
217 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
218 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
219 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
220 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
221 };
222
223 static void fl_set_key_val(struct nlattr **tb,
224 void *val, int val_type,
225 void *mask, int mask_type, int len)
226 {
227 if (!tb[val_type])
228 return;
229 memcpy(val, nla_data(tb[val_type]), len);
230 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
231 memset(mask, 0xff, len);
232 else
233 memcpy(mask, nla_data(tb[mask_type]), len);
234 }
235
236 static int fl_set_key(struct net *net, struct nlattr **tb,
237 struct fl_flow_key *key, struct fl_flow_key *mask)
238 {
239 #ifdef CONFIG_NET_CLS_IND
240 if (tb[TCA_FLOWER_INDEV]) {
241 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
242 if (err < 0)
243 return err;
244 key->indev_ifindex = err;
245 mask->indev_ifindex = 0xffffffff;
246 }
247 #endif
248
249 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
250 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
251 sizeof(key->eth.dst));
252 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
253 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
254 sizeof(key->eth.src));
255 fl_set_key_val(tb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
256 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
257 sizeof(key->basic.n_proto));
258 if (key->basic.n_proto == htons(ETH_P_IP) ||
259 key->basic.n_proto == htons(ETH_P_IPV6)) {
260 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
261 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
262 sizeof(key->basic.ip_proto));
263 }
264 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
265 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
266 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
267 sizeof(key->ipv4.src));
268 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
269 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
270 sizeof(key->ipv4.dst));
271 } else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
272 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
273 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
274 sizeof(key->ipv6.src));
275 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
276 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
277 sizeof(key->ipv6.dst));
278 }
279 if (key->basic.ip_proto == IPPROTO_TCP) {
280 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
281 &mask->tp.src, TCA_FLOWER_UNSPEC,
282 sizeof(key->tp.src));
283 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
284 &mask->tp.dst, TCA_FLOWER_UNSPEC,
285 sizeof(key->tp.dst));
286 } else if (key->basic.ip_proto == IPPROTO_UDP) {
287 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
288 &mask->tp.src, TCA_FLOWER_UNSPEC,
289 sizeof(key->tp.src));
290 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
291 &mask->tp.dst, TCA_FLOWER_UNSPEC,
292 sizeof(key->tp.dst));
293 }
294
295 return 0;
296 }
297
298 static bool fl_mask_eq(struct fl_flow_mask *mask1,
299 struct fl_flow_mask *mask2)
300 {
301 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
302 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
303
304 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
305 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
306 }
307
308 static const struct rhashtable_params fl_ht_params = {
309 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
310 .head_offset = offsetof(struct cls_fl_filter, ht_node),
311 .automatic_shrinking = true,
312 };
313
314 static int fl_init_hashtable(struct cls_fl_head *head,
315 struct fl_flow_mask *mask)
316 {
317 head->ht_params = fl_ht_params;
318 head->ht_params.key_len = fl_mask_range(mask);
319 head->ht_params.key_offset += mask->range.start;
320
321 return rhashtable_init(&head->ht, &head->ht_params);
322 }
323
324 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
325 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
326 #define FL_KEY_MEMBER_END_OFFSET(member) \
327 (FL_KEY_MEMBER_OFFSET(member) + FL_KEY_MEMBER_SIZE(member))
328
329 #define FL_KEY_IN_RANGE(mask, member) \
330 (FL_KEY_MEMBER_OFFSET(member) <= (mask)->range.end && \
331 FL_KEY_MEMBER_END_OFFSET(member) >= (mask)->range.start)
332
333 #define FL_KEY_SET(keys, cnt, id, member) \
334 do { \
335 keys[cnt].key_id = id; \
336 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
337 cnt++; \
338 } while(0);
339
340 #define FL_KEY_SET_IF_IN_RANGE(mask, keys, cnt, id, member) \
341 do { \
342 if (FL_KEY_IN_RANGE(mask, member)) \
343 FL_KEY_SET(keys, cnt, id, member); \
344 } while(0);
345
346 static void fl_init_dissector(struct cls_fl_head *head,
347 struct fl_flow_mask *mask)
348 {
349 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
350 size_t cnt = 0;
351
352 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
353 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
354 FL_KEY_SET_IF_IN_RANGE(mask, keys, cnt,
355 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
356 FL_KEY_SET_IF_IN_RANGE(mask, keys, cnt,
357 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
358 FL_KEY_SET_IF_IN_RANGE(mask, keys, cnt,
359 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
360 FL_KEY_SET_IF_IN_RANGE(mask, keys, cnt,
361 FLOW_DISSECTOR_KEY_PORTS, tp);
362
363 skb_flow_dissector_init(&head->dissector, keys, cnt);
364 }
365
366 static int fl_check_assign_mask(struct cls_fl_head *head,
367 struct fl_flow_mask *mask)
368 {
369 int err;
370
371 if (head->mask_assigned) {
372 if (!fl_mask_eq(&head->mask, mask))
373 return -EINVAL;
374 else
375 return 0;
376 }
377
378 /* Mask is not assigned yet. So assign it and init hashtable
379 * according to that.
380 */
381 err = fl_init_hashtable(head, mask);
382 if (err)
383 return err;
384 memcpy(&head->mask, mask, sizeof(head->mask));
385 head->mask_assigned = true;
386
387 fl_init_dissector(head, mask);
388
389 return 0;
390 }
391
392 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
393 struct cls_fl_filter *f, struct fl_flow_mask *mask,
394 unsigned long base, struct nlattr **tb,
395 struct nlattr *est, bool ovr)
396 {
397 struct tcf_exts e;
398 int err;
399
400 tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
401 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
402 if (err < 0)
403 return err;
404
405 if (tb[TCA_FLOWER_CLASSID]) {
406 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
407 tcf_bind_filter(tp, &f->res, base);
408 }
409
410 err = fl_set_key(net, tb, &f->key, &mask->key);
411 if (err)
412 goto errout;
413
414 fl_mask_update_range(mask);
415 fl_set_masked_key(&f->mkey, &f->key, mask);
416
417 tcf_exts_change(tp, &f->exts, &e);
418
419 return 0;
420 errout:
421 tcf_exts_destroy(&e);
422 return err;
423 }
424
425 static u32 fl_grab_new_handle(struct tcf_proto *tp,
426 struct cls_fl_head *head)
427 {
428 unsigned int i = 0x80000000;
429 u32 handle;
430
431 do {
432 if (++head->hgen == 0x7FFFFFFF)
433 head->hgen = 1;
434 } while (--i > 0 && fl_get(tp, head->hgen));
435
436 if (unlikely(i == 0)) {
437 pr_err("Insufficient number of handles\n");
438 handle = 0;
439 } else {
440 handle = head->hgen;
441 }
442
443 return handle;
444 }
445
446 static int fl_change(struct net *net, struct sk_buff *in_skb,
447 struct tcf_proto *tp, unsigned long base,
448 u32 handle, struct nlattr **tca,
449 unsigned long *arg, bool ovr)
450 {
451 struct cls_fl_head *head = rtnl_dereference(tp->root);
452 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
453 struct cls_fl_filter *fnew;
454 struct nlattr *tb[TCA_FLOWER_MAX + 1];
455 struct fl_flow_mask mask = {};
456 int err;
457
458 if (!tca[TCA_OPTIONS])
459 return -EINVAL;
460
461 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy);
462 if (err < 0)
463 return err;
464
465 if (fold && handle && fold->handle != handle)
466 return -EINVAL;
467
468 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
469 if (!fnew)
470 return -ENOBUFS;
471
472 tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
473
474 if (!handle) {
475 handle = fl_grab_new_handle(tp, head);
476 if (!handle) {
477 err = -EINVAL;
478 goto errout;
479 }
480 }
481 fnew->handle = handle;
482
483 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
484 if (err)
485 goto errout;
486
487 err = fl_check_assign_mask(head, &mask);
488 if (err)
489 goto errout;
490
491 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
492 head->ht_params);
493 if (err)
494 goto errout;
495 if (fold)
496 rhashtable_remove_fast(&head->ht, &fold->ht_node,
497 head->ht_params);
498
499 *arg = (unsigned long) fnew;
500
501 if (fold) {
502 list_replace_rcu(&fold->list, &fnew->list);
503 tcf_unbind_filter(tp, &fold->res);
504 call_rcu(&fold->rcu, fl_destroy_filter);
505 } else {
506 list_add_tail_rcu(&fnew->list, &head->filters);
507 }
508
509 return 0;
510
511 errout:
512 kfree(fnew);
513 return err;
514 }
515
516 static int fl_delete(struct tcf_proto *tp, unsigned long arg)
517 {
518 struct cls_fl_head *head = rtnl_dereference(tp->root);
519 struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
520
521 rhashtable_remove_fast(&head->ht, &f->ht_node,
522 head->ht_params);
523 list_del_rcu(&f->list);
524 tcf_unbind_filter(tp, &f->res);
525 call_rcu(&f->rcu, fl_destroy_filter);
526 return 0;
527 }
528
529 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
530 {
531 struct cls_fl_head *head = rtnl_dereference(tp->root);
532 struct cls_fl_filter *f;
533
534 list_for_each_entry_rcu(f, &head->filters, list) {
535 if (arg->count < arg->skip)
536 goto skip;
537 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
538 arg->stop = 1;
539 break;
540 }
541 skip:
542 arg->count++;
543 }
544 }
545
546 static int fl_dump_key_val(struct sk_buff *skb,
547 void *val, int val_type,
548 void *mask, int mask_type, int len)
549 {
550 int err;
551
552 if (!memchr_inv(mask, 0, len))
553 return 0;
554 err = nla_put(skb, val_type, len, val);
555 if (err)
556 return err;
557 if (mask_type != TCA_FLOWER_UNSPEC) {
558 err = nla_put(skb, mask_type, len, mask);
559 if (err)
560 return err;
561 }
562 return 0;
563 }
564
565 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
566 struct sk_buff *skb, struct tcmsg *t)
567 {
568 struct cls_fl_head *head = rtnl_dereference(tp->root);
569 struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
570 struct nlattr *nest;
571 struct fl_flow_key *key, *mask;
572
573 if (!f)
574 return skb->len;
575
576 t->tcm_handle = f->handle;
577
578 nest = nla_nest_start(skb, TCA_OPTIONS);
579 if (!nest)
580 goto nla_put_failure;
581
582 if (f->res.classid &&
583 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
584 goto nla_put_failure;
585
586 key = &f->key;
587 mask = &head->mask.key;
588
589 if (mask->indev_ifindex) {
590 struct net_device *dev;
591
592 dev = __dev_get_by_index(net, key->indev_ifindex);
593 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
594 goto nla_put_failure;
595 }
596
597 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
598 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
599 sizeof(key->eth.dst)) ||
600 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
601 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
602 sizeof(key->eth.src)) ||
603 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
604 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
605 sizeof(key->basic.n_proto)))
606 goto nla_put_failure;
607 if ((key->basic.n_proto == htons(ETH_P_IP) ||
608 key->basic.n_proto == htons(ETH_P_IPV6)) &&
609 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
610 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
611 sizeof(key->basic.ip_proto)))
612 goto nla_put_failure;
613
614 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
615 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
616 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
617 sizeof(key->ipv4.src)) ||
618 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
619 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
620 sizeof(key->ipv4.dst))))
621 goto nla_put_failure;
622 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
623 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
624 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
625 sizeof(key->ipv6.src)) ||
626 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
627 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
628 sizeof(key->ipv6.dst))))
629 goto nla_put_failure;
630
631 if (key->basic.ip_proto == IPPROTO_TCP &&
632 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
633 &mask->tp.src, TCA_FLOWER_UNSPEC,
634 sizeof(key->tp.src)) ||
635 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
636 &mask->tp.dst, TCA_FLOWER_UNSPEC,
637 sizeof(key->tp.dst))))
638 goto nla_put_failure;
639 else if (key->basic.ip_proto == IPPROTO_UDP &&
640 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
641 &mask->tp.src, TCA_FLOWER_UNSPEC,
642 sizeof(key->tp.src)) ||
643 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
644 &mask->tp.dst, TCA_FLOWER_UNSPEC,
645 sizeof(key->tp.dst))))
646 goto nla_put_failure;
647
648 if (tcf_exts_dump(skb, &f->exts))
649 goto nla_put_failure;
650
651 nla_nest_end(skb, nest);
652
653 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
654 goto nla_put_failure;
655
656 return skb->len;
657
658 nla_put_failure:
659 nla_nest_cancel(skb, nest);
660 return -1;
661 }
662
663 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
664 .kind = "flower",
665 .classify = fl_classify,
666 .init = fl_init,
667 .destroy = fl_destroy,
668 .get = fl_get,
669 .change = fl_change,
670 .delete = fl_delete,
671 .walk = fl_walk,
672 .dump = fl_dump,
673 .owner = THIS_MODULE,
674 };
675
676 static int __init cls_fl_init(void)
677 {
678 return register_tcf_proto_ops(&cls_fl_ops);
679 }
680
681 static void __exit cls_fl_exit(void)
682 {
683 unregister_tcf_proto_ops(&cls_fl_ops);
684 }
685
686 module_init(cls_fl_init);
687 module_exit(cls_fl_exit);
688
689 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
690 MODULE_DESCRIPTION("Flower classifier");
691 MODULE_LICENSE("GPL v2");
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