1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/sched/cls_flower.c Flower classifier
4 *
5 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/rhashtable.h>
12 #include <linux/workqueue.h>
13 #include <linux/refcount.h>
14
15 #include <linux/if_ether.h>
16 #include <linux/in6.h>
17 #include <linux/ip.h>
18 #include <linux/mpls.h>
19
20 #include <net/sch_generic.h>
21 #include <net/pkt_cls.h>
22 #include <net/ip.h>
23 #include <net/flow_dissector.h>
24 #include <net/geneve.h>
25
26 #include <net/dst.h>
27 #include <net/dst_metadata.h>
28
29 #include <uapi/linux/netfilter/nf_conntrack_common.h>
30
31 struct fl_flow_key {
32 struct flow_dissector_key_meta meta;
33 struct flow_dissector_key_control control;
34 struct flow_dissector_key_control enc_control;
35 struct flow_dissector_key_basic basic;
36 struct flow_dissector_key_eth_addrs eth;
37 struct flow_dissector_key_vlan vlan;
38 struct flow_dissector_key_vlan cvlan;
39 union {
40 struct flow_dissector_key_ipv4_addrs ipv4;
41 struct flow_dissector_key_ipv6_addrs ipv6;
42 };
43 struct flow_dissector_key_ports tp;
44 struct flow_dissector_key_icmp icmp;
45 struct flow_dissector_key_arp arp;
46 struct flow_dissector_key_keyid enc_key_id;
47 union {
48 struct flow_dissector_key_ipv4_addrs enc_ipv4;
49 struct flow_dissector_key_ipv6_addrs enc_ipv6;
50 };
51 struct flow_dissector_key_ports enc_tp;
52 struct flow_dissector_key_mpls mpls;
53 struct flow_dissector_key_tcp tcp;
54 struct flow_dissector_key_ip ip;
55 struct flow_dissector_key_ip enc_ip;
56 struct flow_dissector_key_enc_opts enc_opts;
57 union {
58 struct flow_dissector_key_ports tp;
59 struct {
60 struct flow_dissector_key_ports tp_min;
61 struct flow_dissector_key_ports tp_max;
62 };
63 } tp_range;
64 struct flow_dissector_key_ct ct;
65 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
66
67 struct fl_flow_mask_range {
68 unsigned short int start;
69 unsigned short int end;
70 };
71
72 struct fl_flow_mask {
73 struct fl_flow_key key;
74 struct fl_flow_mask_range range;
75 u32 flags;
76 struct rhash_head ht_node;
77 struct rhashtable ht;
78 struct rhashtable_params filter_ht_params;
79 struct flow_dissector dissector;
80 struct list_head filters;
81 struct rcu_work rwork;
82 struct list_head list;
83 refcount_t refcnt;
84 };
85
86 struct fl_flow_tmplt {
87 struct fl_flow_key dummy_key;
88 struct fl_flow_key mask;
89 struct flow_dissector dissector;
90 struct tcf_chain *chain;
91 };
92
93 struct cls_fl_head {
94 struct rhashtable ht;
95 spinlock_t masks_lock; /* Protect masks list */
96 struct list_head masks;
97 struct list_head hw_filters;
98 struct rcu_work rwork;
99 struct idr handle_idr;
100 };
101
102 struct cls_fl_filter {
103 struct fl_flow_mask *mask;
104 struct rhash_head ht_node;
105 struct fl_flow_key mkey;
106 struct tcf_exts exts;
107 struct tcf_result res;
108 struct fl_flow_key key;
109 struct list_head list;
110 struct list_head hw_list;
111 u32 handle;
112 u32 flags;
113 u32 in_hw_count;
114 struct rcu_work rwork;
115 struct net_device *hw_dev;
116 /* Flower classifier is unlocked, which means that its reference counter
117 * can be changed concurrently without any kind of external
118 * synchronization. Use atomic reference counter to be concurrency-safe.
119 */
120 refcount_t refcnt;
121 bool deleted;
122 };
123
124 static const struct rhashtable_params mask_ht_params = {
125 .key_offset = offsetof(struct fl_flow_mask, key),
126 .key_len = sizeof(struct fl_flow_key),
127 .head_offset = offsetof(struct fl_flow_mask, ht_node),
128 .automatic_shrinking = true,
129 };
130
fl_mask_range(const struct fl_flow_mask * mask)131 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
132 {
133 return mask->range.end - mask->range.start;
134 }
135
fl_mask_update_range(struct fl_flow_mask * mask)136 static void fl_mask_update_range(struct fl_flow_mask *mask)
137 {
138 const u8 *bytes = (const u8 *) &mask->key;
139 size_t size = sizeof(mask->key);
140 size_t i, first = 0, last;
141
142 for (i = 0; i < size; i++) {
143 if (bytes[i]) {
144 first = i;
145 break;
146 }
147 }
148 last = first;
149 for (i = size - 1; i != first; i--) {
150 if (bytes[i]) {
151 last = i;
152 break;
153 }
154 }
155 mask->range.start = rounddown(first, sizeof(long));
156 mask->range.end = roundup(last + 1, sizeof(long));
157 }
158
fl_key_get_start(struct fl_flow_key * key,const struct fl_flow_mask * mask)159 static void *fl_key_get_start(struct fl_flow_key *key,
160 const struct fl_flow_mask *mask)
161 {
162 return (u8 *) key + mask->range.start;
163 }
164
fl_set_masked_key(struct fl_flow_key * mkey,struct fl_flow_key * key,struct fl_flow_mask * mask)165 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
166 struct fl_flow_mask *mask)
167 {
168 const long *lkey = fl_key_get_start(key, mask);
169 const long *lmask = fl_key_get_start(&mask->key, mask);
170 long *lmkey = fl_key_get_start(mkey, mask);
171 int i;
172
173 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
174 *lmkey++ = *lkey++ & *lmask++;
175 }
176
fl_mask_fits_tmplt(struct fl_flow_tmplt * tmplt,struct fl_flow_mask * mask)177 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
178 struct fl_flow_mask *mask)
179 {
180 const long *lmask = fl_key_get_start(&mask->key, mask);
181 const long *ltmplt;
182 int i;
183
184 if (!tmplt)
185 return true;
186 ltmplt = fl_key_get_start(&tmplt->mask, mask);
187 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
188 if (~*ltmplt++ & *lmask++)
189 return false;
190 }
191 return true;
192 }
193
fl_clear_masked_range(struct fl_flow_key * key,struct fl_flow_mask * mask)194 static void fl_clear_masked_range(struct fl_flow_key *key,
195 struct fl_flow_mask *mask)
196 {
197 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
198 }
199
fl_range_port_dst_cmp(struct cls_fl_filter * filter,struct fl_flow_key * key,struct fl_flow_key * mkey)200 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
201 struct fl_flow_key *key,
202 struct fl_flow_key *mkey)
203 {
204 __be16 min_mask, max_mask, min_val, max_val;
205
206 min_mask = htons(filter->mask->key.tp_range.tp_min.dst);
207 max_mask = htons(filter->mask->key.tp_range.tp_max.dst);
208 min_val = htons(filter->key.tp_range.tp_min.dst);
209 max_val = htons(filter->key.tp_range.tp_max.dst);
210
211 if (min_mask && max_mask) {
212 if (htons(key->tp_range.tp.dst) < min_val ||
213 htons(key->tp_range.tp.dst) > max_val)
214 return false;
215
216 /* skb does not have min and max values */
217 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst;
218 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst;
219 }
220 return true;
221 }
222
fl_range_port_src_cmp(struct cls_fl_filter * filter,struct fl_flow_key * key,struct fl_flow_key * mkey)223 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
224 struct fl_flow_key *key,
225 struct fl_flow_key *mkey)
226 {
227 __be16 min_mask, max_mask, min_val, max_val;
228
229 min_mask = htons(filter->mask->key.tp_range.tp_min.src);
230 max_mask = htons(filter->mask->key.tp_range.tp_max.src);
231 min_val = htons(filter->key.tp_range.tp_min.src);
232 max_val = htons(filter->key.tp_range.tp_max.src);
233
234 if (min_mask && max_mask) {
235 if (htons(key->tp_range.tp.src) < min_val ||
236 htons(key->tp_range.tp.src) > max_val)
237 return false;
238
239 /* skb does not have min and max values */
240 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src;
241 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src;
242 }
243 return true;
244 }
245
__fl_lookup(struct fl_flow_mask * mask,struct fl_flow_key * mkey)246 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
247 struct fl_flow_key *mkey)
248 {
249 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
250 mask->filter_ht_params);
251 }
252
fl_lookup_range(struct fl_flow_mask * mask,struct fl_flow_key * mkey,struct fl_flow_key * key)253 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
254 struct fl_flow_key *mkey,
255 struct fl_flow_key *key)
256 {
257 struct cls_fl_filter *filter, *f;
258
259 list_for_each_entry_rcu(filter, &mask->filters, list) {
260 if (!fl_range_port_dst_cmp(filter, key, mkey))
261 continue;
262
263 if (!fl_range_port_src_cmp(filter, key, mkey))
264 continue;
265
266 f = __fl_lookup(mask, mkey);
267 if (f)
268 return f;
269 }
270 return NULL;
271 }
272
273 static noinline_for_stack
fl_mask_lookup(struct fl_flow_mask * mask,struct fl_flow_key * key)274 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key)
275 {
276 struct fl_flow_key mkey;
277
278 fl_set_masked_key(&mkey, key, mask);
279 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
280 return fl_lookup_range(mask, &mkey, key);
281
282 return __fl_lookup(mask, &mkey);
283 }
284
285 static u16 fl_ct_info_to_flower_map[] = {
286 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
287 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
288 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
289 TCA_FLOWER_KEY_CT_FLAGS_RELATED,
290 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
291 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
292 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
293 TCA_FLOWER_KEY_CT_FLAGS_RELATED,
294 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
295 TCA_FLOWER_KEY_CT_FLAGS_NEW,
296 };
297
fl_classify(struct sk_buff * skb,const struct tcf_proto * tp,struct tcf_result * res)298 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
299 struct tcf_result *res)
300 {
301 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
302 struct fl_flow_key skb_key;
303 struct fl_flow_mask *mask;
304 struct cls_fl_filter *f;
305
306 list_for_each_entry_rcu(mask, &head->masks, list) {
307 flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
308 fl_clear_masked_range(&skb_key, mask);
309
310 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
311 /* skb_flow_dissect() does not set n_proto in case an unknown
312 * protocol, so do it rather here.
313 */
314 skb_key.basic.n_proto = skb_protocol(skb, false);
315 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
316 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
317 fl_ct_info_to_flower_map,
318 ARRAY_SIZE(fl_ct_info_to_flower_map));
319 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
320
321 f = fl_mask_lookup(mask, &skb_key);
322 if (f && !tc_skip_sw(f->flags)) {
323 *res = f->res;
324 return tcf_exts_exec(skb, &f->exts, res);
325 }
326 }
327 return -1;
328 }
329
fl_init(struct tcf_proto * tp)330 static int fl_init(struct tcf_proto *tp)
331 {
332 struct cls_fl_head *head;
333
334 head = kzalloc(sizeof(*head), GFP_KERNEL);
335 if (!head)
336 return -ENOBUFS;
337
338 spin_lock_init(&head->masks_lock);
339 INIT_LIST_HEAD_RCU(&head->masks);
340 INIT_LIST_HEAD(&head->hw_filters);
341 rcu_assign_pointer(tp->root, head);
342 idr_init(&head->handle_idr);
343
344 return rhashtable_init(&head->ht, &mask_ht_params);
345 }
346
fl_mask_free(struct fl_flow_mask * mask,bool mask_init_done)347 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
348 {
349 /* temporary masks don't have their filters list and ht initialized */
350 if (mask_init_done) {
351 WARN_ON(!list_empty(&mask->filters));
352 rhashtable_destroy(&mask->ht);
353 }
354 kfree(mask);
355 }
356
fl_mask_free_work(struct work_struct * work)357 static void fl_mask_free_work(struct work_struct *work)
358 {
359 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
360 struct fl_flow_mask, rwork);
361
362 fl_mask_free(mask, true);
363 }
364
fl_uninit_mask_free_work(struct work_struct * work)365 static void fl_uninit_mask_free_work(struct work_struct *work)
366 {
367 struct fl_flow_mask *mask = container_of(to_rcu_work(work),
368 struct fl_flow_mask, rwork);
369
370 fl_mask_free(mask, false);
371 }
372
fl_mask_put(struct cls_fl_head * head,struct fl_flow_mask * mask)373 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
374 {
375 if (!refcount_dec_and_test(&mask->refcnt))
376 return false;
377
378 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
379
380 spin_lock(&head->masks_lock);
381 list_del_rcu(&mask->list);
382 spin_unlock(&head->masks_lock);
383
384 tcf_queue_work(&mask->rwork, fl_mask_free_work);
385
386 return true;
387 }
388
fl_head_dereference(struct tcf_proto * tp)389 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
390 {
391 /* Flower classifier only changes root pointer during init and destroy.
392 * Users must obtain reference to tcf_proto instance before calling its
393 * API, so tp->root pointer is protected from concurrent call to
394 * fl_destroy() by reference counting.
395 */
396 return rcu_dereference_raw(tp->root);
397 }
398
__fl_destroy_filter(struct cls_fl_filter * f)399 static void __fl_destroy_filter(struct cls_fl_filter *f)
400 {
401 tcf_exts_destroy(&f->exts);
402 tcf_exts_put_net(&f->exts);
403 kfree(f);
404 }
405
fl_destroy_filter_work(struct work_struct * work)406 static void fl_destroy_filter_work(struct work_struct *work)
407 {
408 struct cls_fl_filter *f = container_of(to_rcu_work(work),
409 struct cls_fl_filter, rwork);
410
411 __fl_destroy_filter(f);
412 }
413
fl_hw_destroy_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held,struct netlink_ext_ack * extack)414 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
415 bool rtnl_held, struct netlink_ext_ack *extack)
416 {
417 struct tcf_block *block = tp->chain->block;
418 struct flow_cls_offload cls_flower = {};
419
420 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
421 cls_flower.command = FLOW_CLS_DESTROY;
422 cls_flower.cookie = (unsigned long) f;
423
424 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
425 &f->flags, &f->in_hw_count, rtnl_held);
426
427 }
428
fl_hw_replace_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held,struct netlink_ext_ack * extack)429 static int fl_hw_replace_filter(struct tcf_proto *tp,
430 struct cls_fl_filter *f, bool rtnl_held,
431 struct netlink_ext_ack *extack)
432 {
433 struct tcf_block *block = tp->chain->block;
434 struct flow_cls_offload cls_flower = {};
435 bool skip_sw = tc_skip_sw(f->flags);
436 int err = 0;
437
438 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
439 if (!cls_flower.rule)
440 return -ENOMEM;
441
442 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
443 cls_flower.command = FLOW_CLS_REPLACE;
444 cls_flower.cookie = (unsigned long) f;
445 cls_flower.rule->match.dissector = &f->mask->dissector;
446 cls_flower.rule->match.mask = &f->mask->key;
447 cls_flower.rule->match.key = &f->mkey;
448 cls_flower.classid = f->res.classid;
449
450 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts,
451 rtnl_held);
452 if (err) {
453 kfree(cls_flower.rule);
454 if (skip_sw) {
455 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
456 return err;
457 }
458 return 0;
459 }
460
461 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
462 skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
463 tc_cleanup_flow_action(&cls_flower.rule->action);
464 kfree(cls_flower.rule);
465
466 if (err) {
467 fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
468 return err;
469 }
470
471 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
472 return -EINVAL;
473
474 return 0;
475 }
476
fl_hw_update_stats(struct tcf_proto * tp,struct cls_fl_filter * f,bool rtnl_held)477 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
478 bool rtnl_held)
479 {
480 struct tcf_block *block = tp->chain->block;
481 struct flow_cls_offload cls_flower = {};
482
483 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
484 cls_flower.command = FLOW_CLS_STATS;
485 cls_flower.cookie = (unsigned long) f;
486 cls_flower.classid = f->res.classid;
487
488 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false,
489 rtnl_held);
490
491 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes,
492 cls_flower.stats.pkts,
493 cls_flower.stats.lastused);
494 }
495
__fl_put(struct cls_fl_filter * f)496 static void __fl_put(struct cls_fl_filter *f)
497 {
498 if (!refcount_dec_and_test(&f->refcnt))
499 return;
500
501 if (tcf_exts_get_net(&f->exts))
502 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
503 else
504 __fl_destroy_filter(f);
505 }
506
__fl_get(struct cls_fl_head * head,u32 handle)507 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
508 {
509 struct cls_fl_filter *f;
510
511 rcu_read_lock();
512 f = idr_find(&head->handle_idr, handle);
513 if (f && !refcount_inc_not_zero(&f->refcnt))
514 f = NULL;
515 rcu_read_unlock();
516
517 return f;
518 }
519
__fl_delete(struct tcf_proto * tp,struct cls_fl_filter * f,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)520 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
521 bool *last, bool rtnl_held,
522 struct netlink_ext_ack *extack)
523 {
524 struct cls_fl_head *head = fl_head_dereference(tp);
525
526 *last = false;
527
528 spin_lock(&tp->lock);
529 if (f->deleted) {
530 spin_unlock(&tp->lock);
531 return -ENOENT;
532 }
533
534 f->deleted = true;
535 rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
536 f->mask->filter_ht_params);
537 idr_remove(&head->handle_idr, f->handle);
538 list_del_rcu(&f->list);
539 spin_unlock(&tp->lock);
540
541 *last = fl_mask_put(head, f->mask);
542 if (!tc_skip_hw(f->flags))
543 fl_hw_destroy_filter(tp, f, rtnl_held, extack);
544 tcf_unbind_filter(tp, &f->res);
545 __fl_put(f);
546
547 return 0;
548 }
549
fl_destroy_sleepable(struct work_struct * work)550 static void fl_destroy_sleepable(struct work_struct *work)
551 {
552 struct cls_fl_head *head = container_of(to_rcu_work(work),
553 struct cls_fl_head,
554 rwork);
555
556 rhashtable_destroy(&head->ht);
557 kfree(head);
558 module_put(THIS_MODULE);
559 }
560
fl_destroy(struct tcf_proto * tp,bool rtnl_held,struct netlink_ext_ack * extack)561 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
562 struct netlink_ext_ack *extack)
563 {
564 struct cls_fl_head *head = fl_head_dereference(tp);
565 struct fl_flow_mask *mask, *next_mask;
566 struct cls_fl_filter *f, *next;
567 bool last;
568
569 list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
570 list_for_each_entry_safe(f, next, &mask->filters, list) {
571 __fl_delete(tp, f, &last, rtnl_held, extack);
572 if (last)
573 break;
574 }
575 }
576 idr_destroy(&head->handle_idr);
577
578 __module_get(THIS_MODULE);
579 tcf_queue_work(&head->rwork, fl_destroy_sleepable);
580 }
581
fl_put(struct tcf_proto * tp,void * arg)582 static void fl_put(struct tcf_proto *tp, void *arg)
583 {
584 struct cls_fl_filter *f = arg;
585
586 __fl_put(f);
587 }
588
fl_get(struct tcf_proto * tp,u32 handle)589 static void *fl_get(struct tcf_proto *tp, u32 handle)
590 {
591 struct cls_fl_head *head = fl_head_dereference(tp);
592
593 return __fl_get(head, handle);
594 }
595
596 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
597 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
598 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
599 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
600 .len = IFNAMSIZ },
601 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
602 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
603 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
604 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
605 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
606 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
607 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
608 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
609 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
610 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
611 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
612 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
613 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
614 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
615 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
616 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
617 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
618 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
619 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
620 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
621 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
622 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
623 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
624 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
625 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
626 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
627 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
628 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
629 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
630 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
631 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
632 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
633 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
634 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
635 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
636 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
637 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
638 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
639 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
640 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
641 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
642 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
643 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
644 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
645 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
646 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
647 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
648 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
649 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
650 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
651 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
652 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
653 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
654 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
655 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
656 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
657 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
658 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
659 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
660 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
661 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
662 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
663 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
664 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
665 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
666 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
667 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
668 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
669 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
670 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
671 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
672 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
673 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 },
674 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 },
675 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
676 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 },
677 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
678 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 },
679 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
680 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED },
681 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED },
682 [TCA_FLOWER_KEY_CT_STATE] = { .type = NLA_U16 },
683 [TCA_FLOWER_KEY_CT_STATE_MASK] = { .type = NLA_U16 },
684 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 },
685 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 },
686 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 },
687 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 },
688 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY,
689 .len = 128 / BITS_PER_BYTE },
690 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
691 .len = 128 / BITS_PER_BYTE },
692 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 },
693 };
694
695 static const struct nla_policy
696 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
697 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
698 };
699
700 static const struct nla_policy
701 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
702 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
703 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
704 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
705 .len = 128 },
706 };
707
fl_set_key_val(struct nlattr ** tb,void * val,int val_type,void * mask,int mask_type,int len)708 static void fl_set_key_val(struct nlattr **tb,
709 void *val, int val_type,
710 void *mask, int mask_type, int len)
711 {
712 if (!tb[val_type])
713 return;
714 nla_memcpy(val, tb[val_type], len);
715 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
716 memset(mask, 0xff, len);
717 else
718 nla_memcpy(mask, tb[mask_type], len);
719 }
720
fl_set_key_port_range(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)721 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
722 struct fl_flow_key *mask,
723 struct netlink_ext_ack *extack)
724 {
725 fl_set_key_val(tb, &key->tp_range.tp_min.dst,
726 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst,
727 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst));
728 fl_set_key_val(tb, &key->tp_range.tp_max.dst,
729 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst,
730 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst));
731 fl_set_key_val(tb, &key->tp_range.tp_min.src,
732 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src,
733 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src));
734 fl_set_key_val(tb, &key->tp_range.tp_max.src,
735 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src,
736 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
737
738 if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) {
739 NL_SET_ERR_MSG(extack,
740 "Both min and max destination ports must be specified");
741 return -EINVAL;
742 }
743 if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) {
744 NL_SET_ERR_MSG(extack,
745 "Both min and max source ports must be specified");
746 return -EINVAL;
747 }
748 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
749 htons(key->tp_range.tp_max.dst) <=
750 htons(key->tp_range.tp_min.dst)) {
751 NL_SET_ERR_MSG_ATTR(extack,
752 tb[TCA_FLOWER_KEY_PORT_DST_MIN],
753 "Invalid destination port range (min must be strictly smaller than max)");
754 return -EINVAL;
755 }
756 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
757 htons(key->tp_range.tp_max.src) <=
758 htons(key->tp_range.tp_min.src)) {
759 NL_SET_ERR_MSG_ATTR(extack,
760 tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
761 "Invalid source port range (min must be strictly smaller than max)");
762 return -EINVAL;
763 }
764
765 return 0;
766 }
767
fl_set_key_mpls(struct nlattr ** tb,struct flow_dissector_key_mpls * key_val,struct flow_dissector_key_mpls * key_mask)768 static int fl_set_key_mpls(struct nlattr **tb,
769 struct flow_dissector_key_mpls *key_val,
770 struct flow_dissector_key_mpls *key_mask)
771 {
772 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
773 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
774 key_mask->mpls_ttl = MPLS_TTL_MASK;
775 }
776 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
777 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
778
779 if (bos & ~MPLS_BOS_MASK)
780 return -EINVAL;
781 key_val->mpls_bos = bos;
782 key_mask->mpls_bos = MPLS_BOS_MASK;
783 }
784 if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
785 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
786
787 if (tc & ~MPLS_TC_MASK)
788 return -EINVAL;
789 key_val->mpls_tc = tc;
790 key_mask->mpls_tc = MPLS_TC_MASK;
791 }
792 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
793 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
794
795 if (label & ~MPLS_LABEL_MASK)
796 return -EINVAL;
797 key_val->mpls_label = label;
798 key_mask->mpls_label = MPLS_LABEL_MASK;
799 }
800 return 0;
801 }
802
fl_set_key_vlan(struct nlattr ** tb,__be16 ethertype,int vlan_id_key,int vlan_prio_key,int vlan_next_eth_type_key,struct flow_dissector_key_vlan * key_val,struct flow_dissector_key_vlan * key_mask)803 static void fl_set_key_vlan(struct nlattr **tb,
804 __be16 ethertype,
805 int vlan_id_key, int vlan_prio_key,
806 int vlan_next_eth_type_key,
807 struct flow_dissector_key_vlan *key_val,
808 struct flow_dissector_key_vlan *key_mask)
809 {
810 #define VLAN_PRIORITY_MASK 0x7
811
812 if (tb[vlan_id_key]) {
813 key_val->vlan_id =
814 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
815 key_mask->vlan_id = VLAN_VID_MASK;
816 }
817 if (tb[vlan_prio_key]) {
818 key_val->vlan_priority =
819 nla_get_u8(tb[vlan_prio_key]) &
820 VLAN_PRIORITY_MASK;
821 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
822 }
823 key_val->vlan_tpid = ethertype;
824 key_mask->vlan_tpid = cpu_to_be16(~0);
825 if (tb[vlan_next_eth_type_key]) {
826 key_val->vlan_eth_type =
827 nla_get_be16(tb[vlan_next_eth_type_key]);
828 key_mask->vlan_eth_type = cpu_to_be16(~0);
829 }
830 }
831
fl_set_key_flag(u32 flower_key,u32 flower_mask,u32 * dissector_key,u32 * dissector_mask,u32 flower_flag_bit,u32 dissector_flag_bit)832 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
833 u32 *dissector_key, u32 *dissector_mask,
834 u32 flower_flag_bit, u32 dissector_flag_bit)
835 {
836 if (flower_mask & flower_flag_bit) {
837 *dissector_mask |= dissector_flag_bit;
838 if (flower_key & flower_flag_bit)
839 *dissector_key |= dissector_flag_bit;
840 }
841 }
842
fl_set_key_flags(struct nlattr ** tb,u32 * flags_key,u32 * flags_mask)843 static int fl_set_key_flags(struct nlattr **tb,
844 u32 *flags_key, u32 *flags_mask)
845 {
846 u32 key, mask;
847
848 /* mask is mandatory for flags */
849 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
850 return -EINVAL;
851
852 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
853 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
854
855 *flags_key = 0;
856 *flags_mask = 0;
857
858 fl_set_key_flag(key, mask, flags_key, flags_mask,
859 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
860 fl_set_key_flag(key, mask, flags_key, flags_mask,
861 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
862 FLOW_DIS_FIRST_FRAG);
863
864 return 0;
865 }
866
fl_set_key_ip(struct nlattr ** tb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)867 static void fl_set_key_ip(struct nlattr **tb, bool encap,
868 struct flow_dissector_key_ip *key,
869 struct flow_dissector_key_ip *mask)
870 {
871 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
872 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
873 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
874 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
875
876 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
877 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
878 }
879
fl_set_geneve_opt(const struct nlattr * nla,struct fl_flow_key * key,int depth,int option_len,struct netlink_ext_ack * extack)880 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
881 int depth, int option_len,
882 struct netlink_ext_ack *extack)
883 {
884 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
885 struct nlattr *class = NULL, *type = NULL, *data = NULL;
886 struct geneve_opt *opt;
887 int err, data_len = 0;
888
889 if (option_len > sizeof(struct geneve_opt))
890 data_len = option_len - sizeof(struct geneve_opt);
891
892 if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4)
893 return -ERANGE;
894
895 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
896 memset(opt, 0xff, option_len);
897 opt->length = data_len / 4;
898 opt->r1 = 0;
899 opt->r2 = 0;
900 opt->r3 = 0;
901
902 /* If no mask has been prodived we assume an exact match. */
903 if (!depth)
904 return sizeof(struct geneve_opt) + data_len;
905
906 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
907 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
908 return -EINVAL;
909 }
910
911 err = nla_parse_nested_deprecated(tb,
912 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
913 nla, geneve_opt_policy, extack);
914 if (err < 0)
915 return err;
916
917 /* We are not allowed to omit any of CLASS, TYPE or DATA
918 * fields from the key.
919 */
920 if (!option_len &&
921 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
922 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
923 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
924 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
925 return -EINVAL;
926 }
927
928 /* Omitting any of CLASS, TYPE or DATA fields is allowed
929 * for the mask.
930 */
931 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
932 int new_len = key->enc_opts.len;
933
934 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
935 data_len = nla_len(data);
936 if (data_len < 4) {
937 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
938 return -ERANGE;
939 }
940 if (data_len % 4) {
941 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
942 return -ERANGE;
943 }
944
945 new_len += sizeof(struct geneve_opt) + data_len;
946 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
947 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
948 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
949 return -ERANGE;
950 }
951 opt->length = data_len / 4;
952 memcpy(opt->opt_data, nla_data(data), data_len);
953 }
954
955 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
956 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
957 opt->opt_class = nla_get_be16(class);
958 }
959
960 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
961 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
962 opt->type = nla_get_u8(type);
963 }
964
965 return sizeof(struct geneve_opt) + data_len;
966 }
967
fl_set_enc_opt(struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)968 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
969 struct fl_flow_key *mask,
970 struct netlink_ext_ack *extack)
971 {
972 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
973 int err, option_len, key_depth, msk_depth = 0;
974
975 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
976 TCA_FLOWER_KEY_ENC_OPTS_MAX,
977 enc_opts_policy, extack);
978 if (err)
979 return err;
980
981 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
982
983 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
984 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
985 TCA_FLOWER_KEY_ENC_OPTS_MAX,
986 enc_opts_policy, extack);
987 if (err)
988 return err;
989
990 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
991 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
992 }
993
994 nla_for_each_attr(nla_opt_key, nla_enc_key,
995 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
996 switch (nla_type(nla_opt_key)) {
997 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
998 option_len = 0;
999 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1000 option_len = fl_set_geneve_opt(nla_opt_key, key,
1001 key_depth, option_len,
1002 extack);
1003 if (option_len < 0)
1004 return option_len;
1005
1006 key->enc_opts.len += option_len;
1007 /* At the same time we need to parse through the mask
1008 * in order to verify exact and mask attribute lengths.
1009 */
1010 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1011 option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1012 msk_depth, option_len,
1013 extack);
1014 if (option_len < 0)
1015 return option_len;
1016
1017 mask->enc_opts.len += option_len;
1018 if (key->enc_opts.len != mask->enc_opts.len) {
1019 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1020 return -EINVAL;
1021 }
1022
1023 if (msk_depth)
1024 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1025 break;
1026 default:
1027 NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1028 return -EINVAL;
1029 }
1030 }
1031
1032 return 0;
1033 }
1034
fl_set_key_ct(struct nlattr ** tb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask,struct netlink_ext_ack * extack)1035 static int fl_set_key_ct(struct nlattr **tb,
1036 struct flow_dissector_key_ct *key,
1037 struct flow_dissector_key_ct *mask,
1038 struct netlink_ext_ack *extack)
1039 {
1040 if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1041 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1042 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1043 return -EOPNOTSUPP;
1044 }
1045 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1046 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1047 sizeof(key->ct_state));
1048 }
1049 if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1050 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1051 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1052 return -EOPNOTSUPP;
1053 }
1054 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1055 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1056 sizeof(key->ct_zone));
1057 }
1058 if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1059 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1060 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1061 return -EOPNOTSUPP;
1062 }
1063 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1064 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1065 sizeof(key->ct_mark));
1066 }
1067 if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1068 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1069 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1070 return -EOPNOTSUPP;
1071 }
1072 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1073 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1074 sizeof(key->ct_labels));
1075 }
1076
1077 return 0;
1078 }
1079
fl_set_key(struct net * net,struct nlattr ** tb,struct fl_flow_key * key,struct fl_flow_key * mask,struct netlink_ext_ack * extack)1080 static int fl_set_key(struct net *net, struct nlattr **tb,
1081 struct fl_flow_key *key, struct fl_flow_key *mask,
1082 struct netlink_ext_ack *extack)
1083 {
1084 __be16 ethertype;
1085 int ret = 0;
1086
1087 if (tb[TCA_FLOWER_INDEV]) {
1088 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1089 if (err < 0)
1090 return err;
1091 key->meta.ingress_ifindex = err;
1092 mask->meta.ingress_ifindex = 0xffffffff;
1093 }
1094
1095 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1096 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1097 sizeof(key->eth.dst));
1098 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1099 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1100 sizeof(key->eth.src));
1101
1102 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
1103 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
1104
1105 if (eth_type_vlan(ethertype)) {
1106 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1107 TCA_FLOWER_KEY_VLAN_PRIO,
1108 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1109 &key->vlan, &mask->vlan);
1110
1111 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
1112 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
1113 if (eth_type_vlan(ethertype)) {
1114 fl_set_key_vlan(tb, ethertype,
1115 TCA_FLOWER_KEY_CVLAN_ID,
1116 TCA_FLOWER_KEY_CVLAN_PRIO,
1117 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1118 &key->cvlan, &mask->cvlan);
1119 fl_set_key_val(tb, &key->basic.n_proto,
1120 TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1121 &mask->basic.n_proto,
1122 TCA_FLOWER_UNSPEC,
1123 sizeof(key->basic.n_proto));
1124 } else {
1125 key->basic.n_proto = ethertype;
1126 mask->basic.n_proto = cpu_to_be16(~0);
1127 }
1128 }
1129 } else {
1130 key->basic.n_proto = ethertype;
1131 mask->basic.n_proto = cpu_to_be16(~0);
1132 }
1133 }
1134
1135 if (key->basic.n_proto == htons(ETH_P_IP) ||
1136 key->basic.n_proto == htons(ETH_P_IPV6)) {
1137 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1138 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1139 sizeof(key->basic.ip_proto));
1140 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1141 }
1142
1143 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1144 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1145 mask->control.addr_type = ~0;
1146 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1147 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1148 sizeof(key->ipv4.src));
1149 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1150 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1151 sizeof(key->ipv4.dst));
1152 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1153 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1154 mask->control.addr_type = ~0;
1155 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1156 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1157 sizeof(key->ipv6.src));
1158 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1159 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1160 sizeof(key->ipv6.dst));
1161 }
1162
1163 if (key->basic.ip_proto == IPPROTO_TCP) {
1164 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1165 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1166 sizeof(key->tp.src));
1167 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1168 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1169 sizeof(key->tp.dst));
1170 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1171 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1172 sizeof(key->tcp.flags));
1173 } else if (key->basic.ip_proto == IPPROTO_UDP) {
1174 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1175 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1176 sizeof(key->tp.src));
1177 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1178 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1179 sizeof(key->tp.dst));
1180 } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1181 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1182 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1183 sizeof(key->tp.src));
1184 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1185 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1186 sizeof(key->tp.dst));
1187 } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1188 key->basic.ip_proto == IPPROTO_ICMP) {
1189 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1190 &mask->icmp.type,
1191 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1192 sizeof(key->icmp.type));
1193 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1194 &mask->icmp.code,
1195 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1196 sizeof(key->icmp.code));
1197 } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1198 key->basic.ip_proto == IPPROTO_ICMPV6) {
1199 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1200 &mask->icmp.type,
1201 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1202 sizeof(key->icmp.type));
1203 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1204 &mask->icmp.code,
1205 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1206 sizeof(key->icmp.code));
1207 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1208 key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1209 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
1210 if (ret)
1211 return ret;
1212 } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1213 key->basic.n_proto == htons(ETH_P_RARP)) {
1214 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1215 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1216 sizeof(key->arp.sip));
1217 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1218 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1219 sizeof(key->arp.tip));
1220 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1221 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1222 sizeof(key->arp.op));
1223 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1224 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1225 sizeof(key->arp.sha));
1226 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1227 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1228 sizeof(key->arp.tha));
1229 }
1230
1231 if (key->basic.ip_proto == IPPROTO_TCP ||
1232 key->basic.ip_proto == IPPROTO_UDP ||
1233 key->basic.ip_proto == IPPROTO_SCTP) {
1234 ret = fl_set_key_port_range(tb, key, mask, extack);
1235 if (ret)
1236 return ret;
1237 }
1238
1239 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1240 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1241 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1242 mask->enc_control.addr_type = ~0;
1243 fl_set_key_val(tb, &key->enc_ipv4.src,
1244 TCA_FLOWER_KEY_ENC_IPV4_SRC,
1245 &mask->enc_ipv4.src,
1246 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1247 sizeof(key->enc_ipv4.src));
1248 fl_set_key_val(tb, &key->enc_ipv4.dst,
1249 TCA_FLOWER_KEY_ENC_IPV4_DST,
1250 &mask->enc_ipv4.dst,
1251 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1252 sizeof(key->enc_ipv4.dst));
1253 }
1254
1255 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1256 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1257 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1258 mask->enc_control.addr_type = ~0;
1259 fl_set_key_val(tb, &key->enc_ipv6.src,
1260 TCA_FLOWER_KEY_ENC_IPV6_SRC,
1261 &mask->enc_ipv6.src,
1262 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1263 sizeof(key->enc_ipv6.src));
1264 fl_set_key_val(tb, &key->enc_ipv6.dst,
1265 TCA_FLOWER_KEY_ENC_IPV6_DST,
1266 &mask->enc_ipv6.dst,
1267 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1268 sizeof(key->enc_ipv6.dst));
1269 }
1270
1271 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1272 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1273 sizeof(key->enc_key_id.keyid));
1274
1275 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1276 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1277 sizeof(key->enc_tp.src));
1278
1279 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1280 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1281 sizeof(key->enc_tp.dst));
1282
1283 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1284
1285 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1286 ret = fl_set_enc_opt(tb, key, mask, extack);
1287 if (ret)
1288 return ret;
1289 }
1290
1291 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1292 if (ret)
1293 return ret;
1294
1295 if (tb[TCA_FLOWER_KEY_FLAGS])
1296 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
1297
1298 return ret;
1299 }
1300
fl_mask_copy(struct fl_flow_mask * dst,struct fl_flow_mask * src)1301 static void fl_mask_copy(struct fl_flow_mask *dst,
1302 struct fl_flow_mask *src)
1303 {
1304 const void *psrc = fl_key_get_start(&src->key, src);
1305 void *pdst = fl_key_get_start(&dst->key, src);
1306
1307 memcpy(pdst, psrc, fl_mask_range(src));
1308 dst->range = src->range;
1309 }
1310
1311 static const struct rhashtable_params fl_ht_params = {
1312 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1313 .head_offset = offsetof(struct cls_fl_filter, ht_node),
1314 .automatic_shrinking = true,
1315 };
1316
fl_init_mask_hashtable(struct fl_flow_mask * mask)1317 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1318 {
1319 mask->filter_ht_params = fl_ht_params;
1320 mask->filter_ht_params.key_len = fl_mask_range(mask);
1321 mask->filter_ht_params.key_offset += mask->range.start;
1322
1323 return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1324 }
1325
1326 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1327 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member)
1328
1329 #define FL_KEY_IS_MASKED(mask, member) \
1330 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
1331 0, FL_KEY_MEMBER_SIZE(member)) \
1332
1333 #define FL_KEY_SET(keys, cnt, id, member) \
1334 do { \
1335 keys[cnt].key_id = id; \
1336 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
1337 cnt++; \
1338 } while(0);
1339
1340 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
1341 do { \
1342 if (FL_KEY_IS_MASKED(mask, member)) \
1343 FL_KEY_SET(keys, cnt, id, member); \
1344 } while(0);
1345
fl_init_dissector(struct flow_dissector * dissector,struct fl_flow_key * mask)1346 static void fl_init_dissector(struct flow_dissector *dissector,
1347 struct fl_flow_key *mask)
1348 {
1349 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1350 size_t cnt = 0;
1351
1352 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1353 FLOW_DISSECTOR_KEY_META, meta);
1354 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1355 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1356 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1357 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1358 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1359 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1360 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1361 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1362 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1363 FLOW_DISSECTOR_KEY_PORTS, tp);
1364 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1365 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
1366 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1367 FLOW_DISSECTOR_KEY_IP, ip);
1368 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1369 FLOW_DISSECTOR_KEY_TCP, tcp);
1370 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1371 FLOW_DISSECTOR_KEY_ICMP, icmp);
1372 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1373 FLOW_DISSECTOR_KEY_ARP, arp);
1374 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1375 FLOW_DISSECTOR_KEY_MPLS, mpls);
1376 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1377 FLOW_DISSECTOR_KEY_VLAN, vlan);
1378 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1379 FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1380 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1381 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1382 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1383 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1384 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1385 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1386 if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1387 FL_KEY_IS_MASKED(mask, enc_ipv6))
1388 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1389 enc_control);
1390 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1391 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1392 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1393 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1394 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1395 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1396 FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1397 FLOW_DISSECTOR_KEY_CT, ct);
1398
1399 skb_flow_dissector_init(dissector, keys, cnt);
1400 }
1401
fl_create_new_mask(struct cls_fl_head * head,struct fl_flow_mask * mask)1402 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1403 struct fl_flow_mask *mask)
1404 {
1405 struct fl_flow_mask *newmask;
1406 int err;
1407
1408 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1409 if (!newmask)
1410 return ERR_PTR(-ENOMEM);
1411
1412 fl_mask_copy(newmask, mask);
1413
1414 if ((newmask->key.tp_range.tp_min.dst &&
1415 newmask->key.tp_range.tp_max.dst) ||
1416 (newmask->key.tp_range.tp_min.src &&
1417 newmask->key.tp_range.tp_max.src))
1418 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1419
1420 err = fl_init_mask_hashtable(newmask);
1421 if (err)
1422 goto errout_free;
1423
1424 fl_init_dissector(&newmask->dissector, &newmask->key);
1425
1426 INIT_LIST_HEAD_RCU(&newmask->filters);
1427
1428 refcount_set(&newmask->refcnt, 1);
1429 err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
1430 &newmask->ht_node, mask_ht_params);
1431 if (err)
1432 goto errout_destroy;
1433
1434 spin_lock(&head->masks_lock);
1435 list_add_tail_rcu(&newmask->list, &head->masks);
1436 spin_unlock(&head->masks_lock);
1437
1438 return newmask;
1439
1440 errout_destroy:
1441 rhashtable_destroy(&newmask->ht);
1442 errout_free:
1443 kfree(newmask);
1444
1445 return ERR_PTR(err);
1446 }
1447
fl_check_assign_mask(struct cls_fl_head * head,struct cls_fl_filter * fnew,struct cls_fl_filter * fold,struct fl_flow_mask * mask)1448 static int fl_check_assign_mask(struct cls_fl_head *head,
1449 struct cls_fl_filter *fnew,
1450 struct cls_fl_filter *fold,
1451 struct fl_flow_mask *mask)
1452 {
1453 struct fl_flow_mask *newmask;
1454 int ret = 0;
1455
1456 rcu_read_lock();
1457
1458 /* Insert mask as temporary node to prevent concurrent creation of mask
1459 * with same key. Any concurrent lookups with same key will return
1460 * -EAGAIN because mask's refcnt is zero.
1461 */
1462 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
1463 &mask->ht_node,
1464 mask_ht_params);
1465 if (!fnew->mask) {
1466 rcu_read_unlock();
1467
1468 if (fold) {
1469 ret = -EINVAL;
1470 goto errout_cleanup;
1471 }
1472
1473 newmask = fl_create_new_mask(head, mask);
1474 if (IS_ERR(newmask)) {
1475 ret = PTR_ERR(newmask);
1476 goto errout_cleanup;
1477 }
1478
1479 fnew->mask = newmask;
1480 return 0;
1481 } else if (IS_ERR(fnew->mask)) {
1482 ret = PTR_ERR(fnew->mask);
1483 } else if (fold && fold->mask != fnew->mask) {
1484 ret = -EINVAL;
1485 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
1486 /* Mask was deleted concurrently, try again */
1487 ret = -EAGAIN;
1488 }
1489 rcu_read_unlock();
1490 return ret;
1491
1492 errout_cleanup:
1493 rhashtable_remove_fast(&head->ht, &mask->ht_node,
1494 mask_ht_params);
1495 return ret;
1496 }
1497
fl_set_parms(struct net * net,struct tcf_proto * tp,struct cls_fl_filter * f,struct fl_flow_mask * mask,unsigned long base,struct nlattr ** tb,struct nlattr * est,bool ovr,struct fl_flow_tmplt * tmplt,bool rtnl_held,struct netlink_ext_ack * extack)1498 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1499 struct cls_fl_filter *f, struct fl_flow_mask *mask,
1500 unsigned long base, struct nlattr **tb,
1501 struct nlattr *est, bool ovr,
1502 struct fl_flow_tmplt *tmplt, bool rtnl_held,
1503 struct netlink_ext_ack *extack)
1504 {
1505 int err;
1506
1507 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held,
1508 extack);
1509 if (err < 0)
1510 return err;
1511
1512 if (tb[TCA_FLOWER_CLASSID]) {
1513 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1514 if (!rtnl_held)
1515 rtnl_lock();
1516 tcf_bind_filter(tp, &f->res, base);
1517 if (!rtnl_held)
1518 rtnl_unlock();
1519 }
1520
1521 err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1522 if (err)
1523 return err;
1524
1525 fl_mask_update_range(mask);
1526 fl_set_masked_key(&f->mkey, &f->key, mask);
1527
1528 if (!fl_mask_fits_tmplt(tmplt, mask)) {
1529 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1530 return -EINVAL;
1531 }
1532
1533 return 0;
1534 }
1535
fl_ht_insert_unique(struct cls_fl_filter * fnew,struct cls_fl_filter * fold,bool * in_ht)1536 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
1537 struct cls_fl_filter *fold,
1538 bool *in_ht)
1539 {
1540 struct fl_flow_mask *mask = fnew->mask;
1541 int err;
1542
1543 err = rhashtable_lookup_insert_fast(&mask->ht,
1544 &fnew->ht_node,
1545 mask->filter_ht_params);
1546 if (err) {
1547 *in_ht = false;
1548 /* It is okay if filter with same key exists when
1549 * overwriting.
1550 */
1551 return fold && err == -EEXIST ? 0 : err;
1552 }
1553
1554 *in_ht = true;
1555 return 0;
1556 }
1557
fl_change(struct net * net,struct sk_buff * in_skb,struct tcf_proto * tp,unsigned long base,u32 handle,struct nlattr ** tca,void ** arg,bool ovr,bool rtnl_held,struct netlink_ext_ack * extack)1558 static int fl_change(struct net *net, struct sk_buff *in_skb,
1559 struct tcf_proto *tp, unsigned long base,
1560 u32 handle, struct nlattr **tca,
1561 void **arg, bool ovr, bool rtnl_held,
1562 struct netlink_ext_ack *extack)
1563 {
1564 struct cls_fl_head *head = fl_head_dereference(tp);
1565 struct cls_fl_filter *fold = *arg;
1566 struct cls_fl_filter *fnew;
1567 struct fl_flow_mask *mask;
1568 struct nlattr **tb;
1569 bool in_ht;
1570 int err;
1571
1572 if (!tca[TCA_OPTIONS]) {
1573 err = -EINVAL;
1574 goto errout_fold;
1575 }
1576
1577 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
1578 if (!mask) {
1579 err = -ENOBUFS;
1580 goto errout_fold;
1581 }
1582
1583 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1584 if (!tb) {
1585 err = -ENOBUFS;
1586 goto errout_mask_alloc;
1587 }
1588
1589 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
1590 tca[TCA_OPTIONS], fl_policy, NULL);
1591 if (err < 0)
1592 goto errout_tb;
1593
1594 if (fold && handle && fold->handle != handle) {
1595 err = -EINVAL;
1596 goto errout_tb;
1597 }
1598
1599 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
1600 if (!fnew) {
1601 err = -ENOBUFS;
1602 goto errout_tb;
1603 }
1604 INIT_LIST_HEAD(&fnew->hw_list);
1605 refcount_set(&fnew->refcnt, 1);
1606
1607 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
1608 if (err < 0)
1609 goto errout;
1610
1611 if (tb[TCA_FLOWER_FLAGS]) {
1612 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
1613
1614 if (!tc_flags_valid(fnew->flags)) {
1615 err = -EINVAL;
1616 goto errout;
1617 }
1618 }
1619
1620 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr,
1621 tp->chain->tmplt_priv, rtnl_held, extack);
1622 if (err)
1623 goto errout;
1624
1625 err = fl_check_assign_mask(head, fnew, fold, mask);
1626 if (err)
1627 goto errout;
1628
1629 err = fl_ht_insert_unique(fnew, fold, &in_ht);
1630 if (err)
1631 goto errout_mask;
1632
1633 if (!tc_skip_hw(fnew->flags)) {
1634 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
1635 if (err)
1636 goto errout_ht;
1637 }
1638
1639 if (!tc_in_hw(fnew->flags))
1640 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1641
1642 spin_lock(&tp->lock);
1643
1644 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
1645 * proto again or create new one, if necessary.
1646 */
1647 if (tp->deleting) {
1648 err = -EAGAIN;
1649 goto errout_hw;
1650 }
1651
1652 if (fold) {
1653 /* Fold filter was deleted concurrently. Retry lookup. */
1654 if (fold->deleted) {
1655 err = -EAGAIN;
1656 goto errout_hw;
1657 }
1658
1659 fnew->handle = handle;
1660
1661 if (!in_ht) {
1662 struct rhashtable_params params =
1663 fnew->mask->filter_ht_params;
1664
1665 err = rhashtable_insert_fast(&fnew->mask->ht,
1666 &fnew->ht_node,
1667 params);
1668 if (err)
1669 goto errout_hw;
1670 in_ht = true;
1671 }
1672
1673 refcount_inc(&fnew->refcnt);
1674 rhashtable_remove_fast(&fold->mask->ht,
1675 &fold->ht_node,
1676 fold->mask->filter_ht_params);
1677 idr_replace(&head->handle_idr, fnew, fnew->handle);
1678 list_replace_rcu(&fold->list, &fnew->list);
1679 fold->deleted = true;
1680
1681 spin_unlock(&tp->lock);
1682
1683 fl_mask_put(head, fold->mask);
1684 if (!tc_skip_hw(fold->flags))
1685 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
1686 tcf_unbind_filter(tp, &fold->res);
1687 /* Caller holds reference to fold, so refcnt is always > 0
1688 * after this.
1689 */
1690 refcount_dec(&fold->refcnt);
1691 __fl_put(fold);
1692 } else {
1693 if (handle) {
1694 /* user specifies a handle and it doesn't exist */
1695 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1696 handle, GFP_ATOMIC);
1697
1698 /* Filter with specified handle was concurrently
1699 * inserted after initial check in cls_api. This is not
1700 * necessarily an error if NLM_F_EXCL is not set in
1701 * message flags. Returning EAGAIN will cause cls_api to
1702 * try to update concurrently inserted rule.
1703 */
1704 if (err == -ENOSPC)
1705 err = -EAGAIN;
1706 } else {
1707 handle = 1;
1708 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1709 INT_MAX, GFP_ATOMIC);
1710 }
1711 if (err)
1712 goto errout_hw;
1713
1714 refcount_inc(&fnew->refcnt);
1715 fnew->handle = handle;
1716 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1717 spin_unlock(&tp->lock);
1718 }
1719
1720 *arg = fnew;
1721
1722 kfree(tb);
1723 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
1724 return 0;
1725
1726 errout_ht:
1727 spin_lock(&tp->lock);
1728 errout_hw:
1729 fnew->deleted = true;
1730 spin_unlock(&tp->lock);
1731 if (!tc_skip_hw(fnew->flags))
1732 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
1733 if (in_ht)
1734 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
1735 fnew->mask->filter_ht_params);
1736 errout_mask:
1737 fl_mask_put(head, fnew->mask);
1738 errout:
1739 __fl_put(fnew);
1740 errout_tb:
1741 kfree(tb);
1742 errout_mask_alloc:
1743 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
1744 errout_fold:
1745 if (fold)
1746 __fl_put(fold);
1747 return err;
1748 }
1749
fl_delete(struct tcf_proto * tp,void * arg,bool * last,bool rtnl_held,struct netlink_ext_ack * extack)1750 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1751 bool rtnl_held, struct netlink_ext_ack *extack)
1752 {
1753 struct cls_fl_head *head = fl_head_dereference(tp);
1754 struct cls_fl_filter *f = arg;
1755 bool last_on_mask;
1756 int err = 0;
1757
1758 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
1759 *last = list_empty(&head->masks);
1760 __fl_put(f);
1761
1762 return err;
1763 }
1764
fl_walk(struct tcf_proto * tp,struct tcf_walker * arg,bool rtnl_held)1765 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
1766 bool rtnl_held)
1767 {
1768 struct cls_fl_head *head = fl_head_dereference(tp);
1769 unsigned long id = arg->cookie, tmp;
1770 struct cls_fl_filter *f;
1771
1772 arg->count = arg->skip;
1773
1774 rcu_read_lock();
1775 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
1776 /* don't return filters that are being deleted */
1777 if (!refcount_inc_not_zero(&f->refcnt))
1778 continue;
1779 rcu_read_unlock();
1780
1781 if (arg->fn(tp, f, arg) < 0) {
1782 __fl_put(f);
1783 arg->stop = 1;
1784 rcu_read_lock();
1785 break;
1786 }
1787 __fl_put(f);
1788 arg->count++;
1789 rcu_read_lock();
1790 }
1791 rcu_read_unlock();
1792 arg->cookie = id;
1793 }
1794
1795 static struct cls_fl_filter *
fl_get_next_hw_filter(struct tcf_proto * tp,struct cls_fl_filter * f,bool add)1796 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
1797 {
1798 struct cls_fl_head *head = fl_head_dereference(tp);
1799
1800 spin_lock(&tp->lock);
1801 if (list_empty(&head->hw_filters)) {
1802 spin_unlock(&tp->lock);
1803 return NULL;
1804 }
1805
1806 if (!f)
1807 f = list_entry(&head->hw_filters, struct cls_fl_filter,
1808 hw_list);
1809 list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
1810 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
1811 spin_unlock(&tp->lock);
1812 return f;
1813 }
1814 }
1815
1816 spin_unlock(&tp->lock);
1817 return NULL;
1818 }
1819
fl_reoffload(struct tcf_proto * tp,bool add,flow_setup_cb_t * cb,void * cb_priv,struct netlink_ext_ack * extack)1820 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
1821 void *cb_priv, struct netlink_ext_ack *extack)
1822 {
1823 struct tcf_block *block = tp->chain->block;
1824 struct flow_cls_offload cls_flower = {};
1825 struct cls_fl_filter *f = NULL;
1826 int err;
1827
1828 /* hw_filters list can only be changed by hw offload functions after
1829 * obtaining rtnl lock. Make sure it is not changed while reoffload is
1830 * iterating it.
1831 */
1832 ASSERT_RTNL();
1833
1834 while ((f = fl_get_next_hw_filter(tp, f, add))) {
1835 cls_flower.rule =
1836 flow_rule_alloc(tcf_exts_num_actions(&f->exts));
1837 if (!cls_flower.rule) {
1838 __fl_put(f);
1839 return -ENOMEM;
1840 }
1841
1842 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
1843 extack);
1844 cls_flower.command = add ?
1845 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
1846 cls_flower.cookie = (unsigned long)f;
1847 cls_flower.rule->match.dissector = &f->mask->dissector;
1848 cls_flower.rule->match.mask = &f->mask->key;
1849 cls_flower.rule->match.key = &f->mkey;
1850
1851 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts,
1852 true);
1853 if (err) {
1854 kfree(cls_flower.rule);
1855 if (tc_skip_sw(f->flags)) {
1856 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
1857 __fl_put(f);
1858 return err;
1859 }
1860 goto next_flow;
1861 }
1862
1863 cls_flower.classid = f->res.classid;
1864
1865 err = tc_setup_cb_reoffload(block, tp, add, cb,
1866 TC_SETUP_CLSFLOWER, &cls_flower,
1867 cb_priv, &f->flags,
1868 &f->in_hw_count);
1869 tc_cleanup_flow_action(&cls_flower.rule->action);
1870 kfree(cls_flower.rule);
1871
1872 if (err) {
1873 __fl_put(f);
1874 return err;
1875 }
1876 next_flow:
1877 __fl_put(f);
1878 }
1879
1880 return 0;
1881 }
1882
fl_hw_add(struct tcf_proto * tp,void * type_data)1883 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
1884 {
1885 struct flow_cls_offload *cls_flower = type_data;
1886 struct cls_fl_filter *f =
1887 (struct cls_fl_filter *) cls_flower->cookie;
1888 struct cls_fl_head *head = fl_head_dereference(tp);
1889
1890 spin_lock(&tp->lock);
1891 list_add(&f->hw_list, &head->hw_filters);
1892 spin_unlock(&tp->lock);
1893 }
1894
fl_hw_del(struct tcf_proto * tp,void * type_data)1895 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
1896 {
1897 struct flow_cls_offload *cls_flower = type_data;
1898 struct cls_fl_filter *f =
1899 (struct cls_fl_filter *) cls_flower->cookie;
1900
1901 spin_lock(&tp->lock);
1902 if (!list_empty(&f->hw_list))
1903 list_del_init(&f->hw_list);
1904 spin_unlock(&tp->lock);
1905 }
1906
fl_hw_create_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)1907 static int fl_hw_create_tmplt(struct tcf_chain *chain,
1908 struct fl_flow_tmplt *tmplt)
1909 {
1910 struct flow_cls_offload cls_flower = {};
1911 struct tcf_block *block = chain->block;
1912
1913 cls_flower.rule = flow_rule_alloc(0);
1914 if (!cls_flower.rule)
1915 return -ENOMEM;
1916
1917 cls_flower.common.chain_index = chain->index;
1918 cls_flower.command = FLOW_CLS_TMPLT_CREATE;
1919 cls_flower.cookie = (unsigned long) tmplt;
1920 cls_flower.rule->match.dissector = &tmplt->dissector;
1921 cls_flower.rule->match.mask = &tmplt->mask;
1922 cls_flower.rule->match.key = &tmplt->dummy_key;
1923
1924 /* We don't care if driver (any of them) fails to handle this
1925 * call. It serves just as a hint for it.
1926 */
1927 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
1928 kfree(cls_flower.rule);
1929
1930 return 0;
1931 }
1932
fl_hw_destroy_tmplt(struct tcf_chain * chain,struct fl_flow_tmplt * tmplt)1933 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
1934 struct fl_flow_tmplt *tmplt)
1935 {
1936 struct flow_cls_offload cls_flower = {};
1937 struct tcf_block *block = chain->block;
1938
1939 cls_flower.common.chain_index = chain->index;
1940 cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
1941 cls_flower.cookie = (unsigned long) tmplt;
1942
1943 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
1944 }
1945
fl_tmplt_create(struct net * net,struct tcf_chain * chain,struct nlattr ** tca,struct netlink_ext_ack * extack)1946 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
1947 struct nlattr **tca,
1948 struct netlink_ext_ack *extack)
1949 {
1950 struct fl_flow_tmplt *tmplt;
1951 struct nlattr **tb;
1952 int err;
1953
1954 if (!tca[TCA_OPTIONS])
1955 return ERR_PTR(-EINVAL);
1956
1957 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1958 if (!tb)
1959 return ERR_PTR(-ENOBUFS);
1960 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
1961 tca[TCA_OPTIONS], fl_policy, NULL);
1962 if (err)
1963 goto errout_tb;
1964
1965 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
1966 if (!tmplt) {
1967 err = -ENOMEM;
1968 goto errout_tb;
1969 }
1970 tmplt->chain = chain;
1971 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
1972 if (err)
1973 goto errout_tmplt;
1974
1975 fl_init_dissector(&tmplt->dissector, &tmplt->mask);
1976
1977 err = fl_hw_create_tmplt(chain, tmplt);
1978 if (err)
1979 goto errout_tmplt;
1980
1981 kfree(tb);
1982 return tmplt;
1983
1984 errout_tmplt:
1985 kfree(tmplt);
1986 errout_tb:
1987 kfree(tb);
1988 return ERR_PTR(err);
1989 }
1990
fl_tmplt_destroy(void * tmplt_priv)1991 static void fl_tmplt_destroy(void *tmplt_priv)
1992 {
1993 struct fl_flow_tmplt *tmplt = tmplt_priv;
1994
1995 fl_hw_destroy_tmplt(tmplt->chain, tmplt);
1996 kfree(tmplt);
1997 }
1998
fl_dump_key_val(struct sk_buff * skb,void * val,int val_type,void * mask,int mask_type,int len)1999 static int fl_dump_key_val(struct sk_buff *skb,
2000 void *val, int val_type,
2001 void *mask, int mask_type, int len)
2002 {
2003 int err;
2004
2005 if (!memchr_inv(mask, 0, len))
2006 return 0;
2007 err = nla_put(skb, val_type, len, val);
2008 if (err)
2009 return err;
2010 if (mask_type != TCA_FLOWER_UNSPEC) {
2011 err = nla_put(skb, mask_type, len, mask);
2012 if (err)
2013 return err;
2014 }
2015 return 0;
2016 }
2017
fl_dump_key_port_range(struct sk_buff * skb,struct fl_flow_key * key,struct fl_flow_key * mask)2018 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2019 struct fl_flow_key *mask)
2020 {
2021 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2022 TCA_FLOWER_KEY_PORT_DST_MIN,
2023 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2024 sizeof(key->tp_range.tp_min.dst)) ||
2025 fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2026 TCA_FLOWER_KEY_PORT_DST_MAX,
2027 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2028 sizeof(key->tp_range.tp_max.dst)) ||
2029 fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2030 TCA_FLOWER_KEY_PORT_SRC_MIN,
2031 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2032 sizeof(key->tp_range.tp_min.src)) ||
2033 fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2034 TCA_FLOWER_KEY_PORT_SRC_MAX,
2035 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2036 sizeof(key->tp_range.tp_max.src)))
2037 return -1;
2038
2039 return 0;
2040 }
2041
fl_dump_key_mpls(struct sk_buff * skb,struct flow_dissector_key_mpls * mpls_key,struct flow_dissector_key_mpls * mpls_mask)2042 static int fl_dump_key_mpls(struct sk_buff *skb,
2043 struct flow_dissector_key_mpls *mpls_key,
2044 struct flow_dissector_key_mpls *mpls_mask)
2045 {
2046 int err;
2047
2048 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
2049 return 0;
2050 if (mpls_mask->mpls_ttl) {
2051 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2052 mpls_key->mpls_ttl);
2053 if (err)
2054 return err;
2055 }
2056 if (mpls_mask->mpls_tc) {
2057 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2058 mpls_key->mpls_tc);
2059 if (err)
2060 return err;
2061 }
2062 if (mpls_mask->mpls_label) {
2063 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2064 mpls_key->mpls_label);
2065 if (err)
2066 return err;
2067 }
2068 if (mpls_mask->mpls_bos) {
2069 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2070 mpls_key->mpls_bos);
2071 if (err)
2072 return err;
2073 }
2074 return 0;
2075 }
2076
fl_dump_key_ip(struct sk_buff * skb,bool encap,struct flow_dissector_key_ip * key,struct flow_dissector_key_ip * mask)2077 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2078 struct flow_dissector_key_ip *key,
2079 struct flow_dissector_key_ip *mask)
2080 {
2081 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2082 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2083 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2084 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2085
2086 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2087 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2088 return -1;
2089
2090 return 0;
2091 }
2092
fl_dump_key_vlan(struct sk_buff * skb,int vlan_id_key,int vlan_prio_key,struct flow_dissector_key_vlan * vlan_key,struct flow_dissector_key_vlan * vlan_mask)2093 static int fl_dump_key_vlan(struct sk_buff *skb,
2094 int vlan_id_key, int vlan_prio_key,
2095 struct flow_dissector_key_vlan *vlan_key,
2096 struct flow_dissector_key_vlan *vlan_mask)
2097 {
2098 int err;
2099
2100 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2101 return 0;
2102 if (vlan_mask->vlan_id) {
2103 err = nla_put_u16(skb, vlan_id_key,
2104 vlan_key->vlan_id);
2105 if (err)
2106 return err;
2107 }
2108 if (vlan_mask->vlan_priority) {
2109 err = nla_put_u8(skb, vlan_prio_key,
2110 vlan_key->vlan_priority);
2111 if (err)
2112 return err;
2113 }
2114 return 0;
2115 }
2116
fl_get_key_flag(u32 dissector_key,u32 dissector_mask,u32 * flower_key,u32 * flower_mask,u32 flower_flag_bit,u32 dissector_flag_bit)2117 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2118 u32 *flower_key, u32 *flower_mask,
2119 u32 flower_flag_bit, u32 dissector_flag_bit)
2120 {
2121 if (dissector_mask & dissector_flag_bit) {
2122 *flower_mask |= flower_flag_bit;
2123 if (dissector_key & dissector_flag_bit)
2124 *flower_key |= flower_flag_bit;
2125 }
2126 }
2127
fl_dump_key_flags(struct sk_buff * skb,u32 flags_key,u32 flags_mask)2128 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2129 {
2130 u32 key, mask;
2131 __be32 _key, _mask;
2132 int err;
2133
2134 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2135 return 0;
2136
2137 key = 0;
2138 mask = 0;
2139
2140 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2141 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2142 fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2143 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2144 FLOW_DIS_FIRST_FRAG);
2145
2146 _key = cpu_to_be32(key);
2147 _mask = cpu_to_be32(mask);
2148
2149 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2150 if (err)
2151 return err;
2152
2153 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2154 }
2155
fl_dump_key_geneve_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * enc_opts)2156 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2157 struct flow_dissector_key_enc_opts *enc_opts)
2158 {
2159 struct geneve_opt *opt;
2160 struct nlattr *nest;
2161 int opt_off = 0;
2162
2163 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2164 if (!nest)
2165 goto nla_put_failure;
2166
2167 while (enc_opts->len > opt_off) {
2168 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2169
2170 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2171 opt->opt_class))
2172 goto nla_put_failure;
2173 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2174 opt->type))
2175 goto nla_put_failure;
2176 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2177 opt->length * 4, opt->opt_data))
2178 goto nla_put_failure;
2179
2180 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2181 }
2182 nla_nest_end(skb, nest);
2183 return 0;
2184
2185 nla_put_failure:
2186 nla_nest_cancel(skb, nest);
2187 return -EMSGSIZE;
2188 }
2189
fl_dump_key_ct(struct sk_buff * skb,struct flow_dissector_key_ct * key,struct flow_dissector_key_ct * mask)2190 static int fl_dump_key_ct(struct sk_buff *skb,
2191 struct flow_dissector_key_ct *key,
2192 struct flow_dissector_key_ct *mask)
2193 {
2194 if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
2195 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
2196 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
2197 sizeof(key->ct_state)))
2198 goto nla_put_failure;
2199
2200 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
2201 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
2202 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
2203 sizeof(key->ct_zone)))
2204 goto nla_put_failure;
2205
2206 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
2207 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
2208 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
2209 sizeof(key->ct_mark)))
2210 goto nla_put_failure;
2211
2212 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
2213 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
2214 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
2215 sizeof(key->ct_labels)))
2216 goto nla_put_failure;
2217
2218 return 0;
2219
2220 nla_put_failure:
2221 return -EMSGSIZE;
2222 }
2223
fl_dump_key_options(struct sk_buff * skb,int enc_opt_type,struct flow_dissector_key_enc_opts * enc_opts)2224 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
2225 struct flow_dissector_key_enc_opts *enc_opts)
2226 {
2227 struct nlattr *nest;
2228 int err;
2229
2230 if (!enc_opts->len)
2231 return 0;
2232
2233 nest = nla_nest_start_noflag(skb, enc_opt_type);
2234 if (!nest)
2235 goto nla_put_failure;
2236
2237 switch (enc_opts->dst_opt_type) {
2238 case TUNNEL_GENEVE_OPT:
2239 err = fl_dump_key_geneve_opt(skb, enc_opts);
2240 if (err)
2241 goto nla_put_failure;
2242 break;
2243 default:
2244 goto nla_put_failure;
2245 }
2246 nla_nest_end(skb, nest);
2247 return 0;
2248
2249 nla_put_failure:
2250 nla_nest_cancel(skb, nest);
2251 return -EMSGSIZE;
2252 }
2253
fl_dump_key_enc_opt(struct sk_buff * skb,struct flow_dissector_key_enc_opts * key_opts,struct flow_dissector_key_enc_opts * msk_opts)2254 static int fl_dump_key_enc_opt(struct sk_buff *skb,
2255 struct flow_dissector_key_enc_opts *key_opts,
2256 struct flow_dissector_key_enc_opts *msk_opts)
2257 {
2258 int err;
2259
2260 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
2261 if (err)
2262 return err;
2263
2264 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
2265 }
2266
fl_dump_key(struct sk_buff * skb,struct net * net,struct fl_flow_key * key,struct fl_flow_key * mask)2267 static int fl_dump_key(struct sk_buff *skb, struct net *net,
2268 struct fl_flow_key *key, struct fl_flow_key *mask)
2269 {
2270 if (mask->meta.ingress_ifindex) {
2271 struct net_device *dev;
2272
2273 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
2274 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
2275 goto nla_put_failure;
2276 }
2277
2278 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
2279 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
2280 sizeof(key->eth.dst)) ||
2281 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
2282 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
2283 sizeof(key->eth.src)) ||
2284 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
2285 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
2286 sizeof(key->basic.n_proto)))
2287 goto nla_put_failure;
2288
2289 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
2290 goto nla_put_failure;
2291
2292 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
2293 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
2294 goto nla_put_failure;
2295
2296 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
2297 TCA_FLOWER_KEY_CVLAN_PRIO,
2298 &key->cvlan, &mask->cvlan) ||
2299 (mask->cvlan.vlan_tpid &&
2300 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2301 key->cvlan.vlan_tpid)))
2302 goto nla_put_failure;
2303
2304 if (mask->basic.n_proto) {
2305 if (mask->cvlan.vlan_eth_type) {
2306 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
2307 key->basic.n_proto))
2308 goto nla_put_failure;
2309 } else if (mask->vlan.vlan_eth_type) {
2310 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2311 key->vlan.vlan_eth_type))
2312 goto nla_put_failure;
2313 }
2314 }
2315
2316 if ((key->basic.n_proto == htons(ETH_P_IP) ||
2317 key->basic.n_proto == htons(ETH_P_IPV6)) &&
2318 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
2319 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
2320 sizeof(key->basic.ip_proto)) ||
2321 fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
2322 goto nla_put_failure;
2323
2324 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2325 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
2326 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
2327 sizeof(key->ipv4.src)) ||
2328 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
2329 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
2330 sizeof(key->ipv4.dst))))
2331 goto nla_put_failure;
2332 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2333 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
2334 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
2335 sizeof(key->ipv6.src)) ||
2336 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
2337 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
2338 sizeof(key->ipv6.dst))))
2339 goto nla_put_failure;
2340
2341 if (key->basic.ip_proto == IPPROTO_TCP &&
2342 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
2343 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
2344 sizeof(key->tp.src)) ||
2345 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
2346 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
2347 sizeof(key->tp.dst)) ||
2348 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
2349 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
2350 sizeof(key->tcp.flags))))
2351 goto nla_put_failure;
2352 else if (key->basic.ip_proto == IPPROTO_UDP &&
2353 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
2354 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
2355 sizeof(key->tp.src)) ||
2356 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
2357 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
2358 sizeof(key->tp.dst))))
2359 goto nla_put_failure;
2360 else if (key->basic.ip_proto == IPPROTO_SCTP &&
2361 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
2362 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
2363 sizeof(key->tp.src)) ||
2364 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
2365 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
2366 sizeof(key->tp.dst))))
2367 goto nla_put_failure;
2368 else if (key->basic.n_proto == htons(ETH_P_IP) &&
2369 key->basic.ip_proto == IPPROTO_ICMP &&
2370 (fl_dump_key_val(skb, &key->icmp.type,
2371 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
2372 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
2373 sizeof(key->icmp.type)) ||
2374 fl_dump_key_val(skb, &key->icmp.code,
2375 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
2376 TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
2377 sizeof(key->icmp.code))))
2378 goto nla_put_failure;
2379 else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
2380 key->basic.ip_proto == IPPROTO_ICMPV6 &&
2381 (fl_dump_key_val(skb, &key->icmp.type,
2382 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
2383 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
2384 sizeof(key->icmp.type)) ||
2385 fl_dump_key_val(skb, &key->icmp.code,
2386 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
2387 TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
2388 sizeof(key->icmp.code))))
2389 goto nla_put_failure;
2390 else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
2391 key->basic.n_proto == htons(ETH_P_RARP)) &&
2392 (fl_dump_key_val(skb, &key->arp.sip,
2393 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
2394 TCA_FLOWER_KEY_ARP_SIP_MASK,
2395 sizeof(key->arp.sip)) ||
2396 fl_dump_key_val(skb, &key->arp.tip,
2397 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
2398 TCA_FLOWER_KEY_ARP_TIP_MASK,
2399 sizeof(key->arp.tip)) ||
2400 fl_dump_key_val(skb, &key->arp.op,
2401 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
2402 TCA_FLOWER_KEY_ARP_OP_MASK,
2403 sizeof(key->arp.op)) ||
2404 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
2405 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
2406 sizeof(key->arp.sha)) ||
2407 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
2408 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
2409 sizeof(key->arp.tha))))
2410 goto nla_put_failure;
2411
2412 if ((key->basic.ip_proto == IPPROTO_TCP ||
2413 key->basic.ip_proto == IPPROTO_UDP ||
2414 key->basic.ip_proto == IPPROTO_SCTP) &&
2415 fl_dump_key_port_range(skb, key, mask))
2416 goto nla_put_failure;
2417
2418 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2419 (fl_dump_key_val(skb, &key->enc_ipv4.src,
2420 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
2421 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
2422 sizeof(key->enc_ipv4.src)) ||
2423 fl_dump_key_val(skb, &key->enc_ipv4.dst,
2424 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
2425 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
2426 sizeof(key->enc_ipv4.dst))))
2427 goto nla_put_failure;
2428 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2429 (fl_dump_key_val(skb, &key->enc_ipv6.src,
2430 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
2431 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
2432 sizeof(key->enc_ipv6.src)) ||
2433 fl_dump_key_val(skb, &key->enc_ipv6.dst,
2434 TCA_FLOWER_KEY_ENC_IPV6_DST,
2435 &mask->enc_ipv6.dst,
2436 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
2437 sizeof(key->enc_ipv6.dst))))
2438 goto nla_put_failure;
2439
2440 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
2441 &mask->enc_key_id, TCA_FLOWER_UNSPEC,
2442 sizeof(key->enc_key_id)) ||
2443 fl_dump_key_val(skb, &key->enc_tp.src,
2444 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
2445 &mask->enc_tp.src,
2446 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
2447 sizeof(key->enc_tp.src)) ||
2448 fl_dump_key_val(skb, &key->enc_tp.dst,
2449 TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
2450 &mask->enc_tp.dst,
2451 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
2452 sizeof(key->enc_tp.dst)) ||
2453 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
2454 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
2455 goto nla_put_failure;
2456
2457 if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
2458 goto nla_put_failure;
2459
2460 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
2461 goto nla_put_failure;
2462
2463 return 0;
2464
2465 nla_put_failure:
2466 return -EMSGSIZE;
2467 }
2468
fl_dump(struct net * net,struct tcf_proto * tp,void * fh,struct sk_buff * skb,struct tcmsg * t,bool rtnl_held)2469 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
2470 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
2471 {
2472 struct cls_fl_filter *f = fh;
2473 struct nlattr *nest;
2474 struct fl_flow_key *key, *mask;
2475 bool skip_hw;
2476
2477 if (!f)
2478 return skb->len;
2479
2480 t->tcm_handle = f->handle;
2481
2482 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
2483 if (!nest)
2484 goto nla_put_failure;
2485
2486 spin_lock(&tp->lock);
2487
2488 if (f->res.classid &&
2489 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
2490 goto nla_put_failure_locked;
2491
2492 key = &f->key;
2493 mask = &f->mask->key;
2494 skip_hw = tc_skip_hw(f->flags);
2495
2496 if (fl_dump_key(skb, net, key, mask))
2497 goto nla_put_failure_locked;
2498
2499 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
2500 goto nla_put_failure_locked;
2501
2502 spin_unlock(&tp->lock);
2503
2504 if (!skip_hw)
2505 fl_hw_update_stats(tp, f, rtnl_held);
2506
2507 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
2508 goto nla_put_failure;
2509
2510 if (tcf_exts_dump(skb, &f->exts))
2511 goto nla_put_failure;
2512
2513 nla_nest_end(skb, nest);
2514
2515 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
2516 goto nla_put_failure;
2517
2518 return skb->len;
2519
2520 nla_put_failure_locked:
2521 spin_unlock(&tp->lock);
2522 nla_put_failure:
2523 nla_nest_cancel(skb, nest);
2524 return -1;
2525 }
2526
fl_tmplt_dump(struct sk_buff * skb,struct net * net,void * tmplt_priv)2527 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
2528 {
2529 struct fl_flow_tmplt *tmplt = tmplt_priv;
2530 struct fl_flow_key *key, *mask;
2531 struct nlattr *nest;
2532
2533 nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
2534 if (!nest)
2535 goto nla_put_failure;
2536
2537 key = &tmplt->dummy_key;
2538 mask = &tmplt->mask;
2539
2540 if (fl_dump_key(skb, net, key, mask))
2541 goto nla_put_failure;
2542
2543 nla_nest_end(skb, nest);
2544
2545 return skb->len;
2546
2547 nla_put_failure:
2548 nla_nest_cancel(skb, nest);
2549 return -EMSGSIZE;
2550 }
2551
fl_bind_class(void * fh,u32 classid,unsigned long cl,void * q,unsigned long base)2552 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
2553 unsigned long base)
2554 {
2555 struct cls_fl_filter *f = fh;
2556
2557 if (f && f->res.classid == classid) {
2558 if (cl)
2559 __tcf_bind_filter(q, &f->res, base);
2560 else
2561 __tcf_unbind_filter(q, &f->res);
2562 }
2563 }
2564
fl_delete_empty(struct tcf_proto * tp)2565 static bool fl_delete_empty(struct tcf_proto *tp)
2566 {
2567 struct cls_fl_head *head = fl_head_dereference(tp);
2568
2569 spin_lock(&tp->lock);
2570 tp->deleting = idr_is_empty(&head->handle_idr);
2571 spin_unlock(&tp->lock);
2572
2573 return tp->deleting;
2574 }
2575
2576 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
2577 .kind = "flower",
2578 .classify = fl_classify,
2579 .init = fl_init,
2580 .destroy = fl_destroy,
2581 .get = fl_get,
2582 .put = fl_put,
2583 .change = fl_change,
2584 .delete = fl_delete,
2585 .delete_empty = fl_delete_empty,
2586 .walk = fl_walk,
2587 .reoffload = fl_reoffload,
2588 .hw_add = fl_hw_add,
2589 .hw_del = fl_hw_del,
2590 .dump = fl_dump,
2591 .bind_class = fl_bind_class,
2592 .tmplt_create = fl_tmplt_create,
2593 .tmplt_destroy = fl_tmplt_destroy,
2594 .tmplt_dump = fl_tmplt_dump,
2595 .owner = THIS_MODULE,
2596 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED,
2597 };
2598
cls_fl_init(void)2599 static int __init cls_fl_init(void)
2600 {
2601 return register_tcf_proto_ops(&cls_fl_ops);
2602 }
2603
cls_fl_exit(void)2604 static void __exit cls_fl_exit(void)
2605 {
2606 unregister_tcf_proto_ops(&cls_fl_ops);
2607 }
2608
2609 module_init(cls_fl_init);
2610 module_exit(cls_fl_exit);
2611
2612 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2613 MODULE_DESCRIPTION("Flower classifier");
2614 MODULE_LICENSE("GPL v2");
2615