xref: /linux/net/sched/cls_flower.c (revision 0750b8fcf313845b21c71344b4bea8ad7d3cee84)
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/pkt_sched.h>
23 #include <net/ip.h>
24 #include <net/flow_dissector.h>
25 #include <net/geneve.h>
26 #include <net/vxlan.h>
27 #include <net/erspan.h>
28 
29 #include <net/dst.h>
30 #include <net/dst_metadata.h>
31 
32 #include <uapi/linux/netfilter/nf_conntrack_common.h>
33 
34 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \
35 		((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1)
36 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \
37 		(TCA_FLOWER_KEY_CT_FLAGS_MAX - 1)
38 
39 struct fl_flow_key {
40 	struct flow_dissector_key_meta meta;
41 	struct flow_dissector_key_control control;
42 	struct flow_dissector_key_control enc_control;
43 	struct flow_dissector_key_basic basic;
44 	struct flow_dissector_key_eth_addrs eth;
45 	struct flow_dissector_key_vlan vlan;
46 	struct flow_dissector_key_vlan cvlan;
47 	union {
48 		struct flow_dissector_key_ipv4_addrs ipv4;
49 		struct flow_dissector_key_ipv6_addrs ipv6;
50 	};
51 	struct flow_dissector_key_ports tp;
52 	struct flow_dissector_key_icmp icmp;
53 	struct flow_dissector_key_arp arp;
54 	struct flow_dissector_key_keyid enc_key_id;
55 	union {
56 		struct flow_dissector_key_ipv4_addrs enc_ipv4;
57 		struct flow_dissector_key_ipv6_addrs enc_ipv6;
58 	};
59 	struct flow_dissector_key_ports enc_tp;
60 	struct flow_dissector_key_mpls mpls;
61 	struct flow_dissector_key_tcp tcp;
62 	struct flow_dissector_key_ip ip;
63 	struct flow_dissector_key_ip enc_ip;
64 	struct flow_dissector_key_enc_opts enc_opts;
65 	union {
66 		struct flow_dissector_key_ports tp;
67 		struct {
68 			struct flow_dissector_key_ports tp_min;
69 			struct flow_dissector_key_ports tp_max;
70 		};
71 	} tp_range;
72 	struct flow_dissector_key_ct ct;
73 	struct flow_dissector_key_hash hash;
74 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
75 
76 struct fl_flow_mask_range {
77 	unsigned short int start;
78 	unsigned short int end;
79 };
80 
81 struct fl_flow_mask {
82 	struct fl_flow_key key;
83 	struct fl_flow_mask_range range;
84 	u32 flags;
85 	struct rhash_head ht_node;
86 	struct rhashtable ht;
87 	struct rhashtable_params filter_ht_params;
88 	struct flow_dissector dissector;
89 	struct list_head filters;
90 	struct rcu_work rwork;
91 	struct list_head list;
92 	refcount_t refcnt;
93 };
94 
95 struct fl_flow_tmplt {
96 	struct fl_flow_key dummy_key;
97 	struct fl_flow_key mask;
98 	struct flow_dissector dissector;
99 	struct tcf_chain *chain;
100 };
101 
102 struct cls_fl_head {
103 	struct rhashtable ht;
104 	spinlock_t masks_lock; /* Protect masks list */
105 	struct list_head masks;
106 	struct list_head hw_filters;
107 	struct rcu_work rwork;
108 	struct idr handle_idr;
109 };
110 
111 struct cls_fl_filter {
112 	struct fl_flow_mask *mask;
113 	struct rhash_head ht_node;
114 	struct fl_flow_key mkey;
115 	struct tcf_exts exts;
116 	struct tcf_result res;
117 	struct fl_flow_key key;
118 	struct list_head list;
119 	struct list_head hw_list;
120 	u32 handle;
121 	u32 flags;
122 	u32 in_hw_count;
123 	struct rcu_work rwork;
124 	struct net_device *hw_dev;
125 	/* Flower classifier is unlocked, which means that its reference counter
126 	 * can be changed concurrently without any kind of external
127 	 * synchronization. Use atomic reference counter to be concurrency-safe.
128 	 */
129 	refcount_t refcnt;
130 	bool deleted;
131 };
132 
133 static const struct rhashtable_params mask_ht_params = {
134 	.key_offset = offsetof(struct fl_flow_mask, key),
135 	.key_len = sizeof(struct fl_flow_key),
136 	.head_offset = offsetof(struct fl_flow_mask, ht_node),
137 	.automatic_shrinking = true,
138 };
139 
140 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
141 {
142 	return mask->range.end - mask->range.start;
143 }
144 
145 static void fl_mask_update_range(struct fl_flow_mask *mask)
146 {
147 	const u8 *bytes = (const u8 *) &mask->key;
148 	size_t size = sizeof(mask->key);
149 	size_t i, first = 0, last;
150 
151 	for (i = 0; i < size; i++) {
152 		if (bytes[i]) {
153 			first = i;
154 			break;
155 		}
156 	}
157 	last = first;
158 	for (i = size - 1; i != first; i--) {
159 		if (bytes[i]) {
160 			last = i;
161 			break;
162 		}
163 	}
164 	mask->range.start = rounddown(first, sizeof(long));
165 	mask->range.end = roundup(last + 1, sizeof(long));
166 }
167 
168 static void *fl_key_get_start(struct fl_flow_key *key,
169 			      const struct fl_flow_mask *mask)
170 {
171 	return (u8 *) key + mask->range.start;
172 }
173 
174 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
175 			      struct fl_flow_mask *mask)
176 {
177 	const long *lkey = fl_key_get_start(key, mask);
178 	const long *lmask = fl_key_get_start(&mask->key, mask);
179 	long *lmkey = fl_key_get_start(mkey, mask);
180 	int i;
181 
182 	for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
183 		*lmkey++ = *lkey++ & *lmask++;
184 }
185 
186 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
187 			       struct fl_flow_mask *mask)
188 {
189 	const long *lmask = fl_key_get_start(&mask->key, mask);
190 	const long *ltmplt;
191 	int i;
192 
193 	if (!tmplt)
194 		return true;
195 	ltmplt = fl_key_get_start(&tmplt->mask, mask);
196 	for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
197 		if (~*ltmplt++ & *lmask++)
198 			return false;
199 	}
200 	return true;
201 }
202 
203 static void fl_clear_masked_range(struct fl_flow_key *key,
204 				  struct fl_flow_mask *mask)
205 {
206 	memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
207 }
208 
209 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
210 				  struct fl_flow_key *key,
211 				  struct fl_flow_key *mkey)
212 {
213 	u16 min_mask, max_mask, min_val, max_val;
214 
215 	min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst);
216 	max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst);
217 	min_val = ntohs(filter->key.tp_range.tp_min.dst);
218 	max_val = ntohs(filter->key.tp_range.tp_max.dst);
219 
220 	if (min_mask && max_mask) {
221 		if (ntohs(key->tp_range.tp.dst) < min_val ||
222 		    ntohs(key->tp_range.tp.dst) > max_val)
223 			return false;
224 
225 		/* skb does not have min and max values */
226 		mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst;
227 		mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst;
228 	}
229 	return true;
230 }
231 
232 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
233 				  struct fl_flow_key *key,
234 				  struct fl_flow_key *mkey)
235 {
236 	u16 min_mask, max_mask, min_val, max_val;
237 
238 	min_mask = ntohs(filter->mask->key.tp_range.tp_min.src);
239 	max_mask = ntohs(filter->mask->key.tp_range.tp_max.src);
240 	min_val = ntohs(filter->key.tp_range.tp_min.src);
241 	max_val = ntohs(filter->key.tp_range.tp_max.src);
242 
243 	if (min_mask && max_mask) {
244 		if (ntohs(key->tp_range.tp.src) < min_val ||
245 		    ntohs(key->tp_range.tp.src) > max_val)
246 			return false;
247 
248 		/* skb does not have min and max values */
249 		mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src;
250 		mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src;
251 	}
252 	return true;
253 }
254 
255 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
256 					 struct fl_flow_key *mkey)
257 {
258 	return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
259 				      mask->filter_ht_params);
260 }
261 
262 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
263 					     struct fl_flow_key *mkey,
264 					     struct fl_flow_key *key)
265 {
266 	struct cls_fl_filter *filter, *f;
267 
268 	list_for_each_entry_rcu(filter, &mask->filters, list) {
269 		if (!fl_range_port_dst_cmp(filter, key, mkey))
270 			continue;
271 
272 		if (!fl_range_port_src_cmp(filter, key, mkey))
273 			continue;
274 
275 		f = __fl_lookup(mask, mkey);
276 		if (f)
277 			return f;
278 	}
279 	return NULL;
280 }
281 
282 static noinline_for_stack
283 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key)
284 {
285 	struct fl_flow_key mkey;
286 
287 	fl_set_masked_key(&mkey, key, mask);
288 	if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
289 		return fl_lookup_range(mask, &mkey, key);
290 
291 	return __fl_lookup(mask, &mkey);
292 }
293 
294 static u16 fl_ct_info_to_flower_map[] = {
295 	[IP_CT_ESTABLISHED] =		TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
296 					TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
297 	[IP_CT_RELATED] =		TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
298 					TCA_FLOWER_KEY_CT_FLAGS_RELATED,
299 	[IP_CT_ESTABLISHED_REPLY] =	TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
300 					TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED |
301 					TCA_FLOWER_KEY_CT_FLAGS_REPLY,
302 	[IP_CT_RELATED_REPLY] =		TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
303 					TCA_FLOWER_KEY_CT_FLAGS_RELATED |
304 					TCA_FLOWER_KEY_CT_FLAGS_REPLY,
305 	[IP_CT_NEW] =			TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
306 					TCA_FLOWER_KEY_CT_FLAGS_NEW,
307 };
308 
309 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
310 		       struct tcf_result *res)
311 {
312 	struct cls_fl_head *head = rcu_dereference_bh(tp->root);
313 	bool post_ct = tc_skb_cb(skb)->post_ct;
314 	u16 zone = tc_skb_cb(skb)->zone;
315 	struct fl_flow_key skb_key;
316 	struct fl_flow_mask *mask;
317 	struct cls_fl_filter *f;
318 
319 	list_for_each_entry_rcu(mask, &head->masks, list) {
320 		flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
321 		fl_clear_masked_range(&skb_key, mask);
322 
323 		skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
324 		/* skb_flow_dissect() does not set n_proto in case an unknown
325 		 * protocol, so do it rather here.
326 		 */
327 		skb_key.basic.n_proto = skb_protocol(skb, false);
328 		skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
329 		skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
330 				    fl_ct_info_to_flower_map,
331 				    ARRAY_SIZE(fl_ct_info_to_flower_map),
332 				    post_ct, zone);
333 		skb_flow_dissect_hash(skb, &mask->dissector, &skb_key);
334 		skb_flow_dissect(skb, &mask->dissector, &skb_key,
335 				 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP);
336 
337 		f = fl_mask_lookup(mask, &skb_key);
338 		if (f && !tc_skip_sw(f->flags)) {
339 			*res = f->res;
340 			return tcf_exts_exec(skb, &f->exts, res);
341 		}
342 	}
343 	return -1;
344 }
345 
346 static int fl_init(struct tcf_proto *tp)
347 {
348 	struct cls_fl_head *head;
349 
350 	head = kzalloc(sizeof(*head), GFP_KERNEL);
351 	if (!head)
352 		return -ENOBUFS;
353 
354 	spin_lock_init(&head->masks_lock);
355 	INIT_LIST_HEAD_RCU(&head->masks);
356 	INIT_LIST_HEAD(&head->hw_filters);
357 	rcu_assign_pointer(tp->root, head);
358 	idr_init(&head->handle_idr);
359 
360 	return rhashtable_init(&head->ht, &mask_ht_params);
361 }
362 
363 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
364 {
365 	/* temporary masks don't have their filters list and ht initialized */
366 	if (mask_init_done) {
367 		WARN_ON(!list_empty(&mask->filters));
368 		rhashtable_destroy(&mask->ht);
369 	}
370 	kfree(mask);
371 }
372 
373 static void fl_mask_free_work(struct work_struct *work)
374 {
375 	struct fl_flow_mask *mask = container_of(to_rcu_work(work),
376 						 struct fl_flow_mask, rwork);
377 
378 	fl_mask_free(mask, true);
379 }
380 
381 static void fl_uninit_mask_free_work(struct work_struct *work)
382 {
383 	struct fl_flow_mask *mask = container_of(to_rcu_work(work),
384 						 struct fl_flow_mask, rwork);
385 
386 	fl_mask_free(mask, false);
387 }
388 
389 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
390 {
391 	if (!refcount_dec_and_test(&mask->refcnt))
392 		return false;
393 
394 	rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
395 
396 	spin_lock(&head->masks_lock);
397 	list_del_rcu(&mask->list);
398 	spin_unlock(&head->masks_lock);
399 
400 	tcf_queue_work(&mask->rwork, fl_mask_free_work);
401 
402 	return true;
403 }
404 
405 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
406 {
407 	/* Flower classifier only changes root pointer during init and destroy.
408 	 * Users must obtain reference to tcf_proto instance before calling its
409 	 * API, so tp->root pointer is protected from concurrent call to
410 	 * fl_destroy() by reference counting.
411 	 */
412 	return rcu_dereference_raw(tp->root);
413 }
414 
415 static void __fl_destroy_filter(struct cls_fl_filter *f)
416 {
417 	tcf_exts_destroy(&f->exts);
418 	tcf_exts_put_net(&f->exts);
419 	kfree(f);
420 }
421 
422 static void fl_destroy_filter_work(struct work_struct *work)
423 {
424 	struct cls_fl_filter *f = container_of(to_rcu_work(work),
425 					struct cls_fl_filter, rwork);
426 
427 	__fl_destroy_filter(f);
428 }
429 
430 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
431 				 bool rtnl_held, struct netlink_ext_ack *extack)
432 {
433 	struct tcf_block *block = tp->chain->block;
434 	struct flow_cls_offload cls_flower = {};
435 
436 	tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
437 	cls_flower.command = FLOW_CLS_DESTROY;
438 	cls_flower.cookie = (unsigned long) f;
439 
440 	tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
441 			    &f->flags, &f->in_hw_count, rtnl_held);
442 
443 }
444 
445 static int fl_hw_replace_filter(struct tcf_proto *tp,
446 				struct cls_fl_filter *f, bool rtnl_held,
447 				struct netlink_ext_ack *extack)
448 {
449 	struct tcf_block *block = tp->chain->block;
450 	struct flow_cls_offload cls_flower = {};
451 	bool skip_sw = tc_skip_sw(f->flags);
452 	int err = 0;
453 
454 	cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
455 	if (!cls_flower.rule)
456 		return -ENOMEM;
457 
458 	tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
459 	cls_flower.command = FLOW_CLS_REPLACE;
460 	cls_flower.cookie = (unsigned long) f;
461 	cls_flower.rule->match.dissector = &f->mask->dissector;
462 	cls_flower.rule->match.mask = &f->mask->key;
463 	cls_flower.rule->match.key = &f->mkey;
464 	cls_flower.classid = f->res.classid;
465 
466 	err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts);
467 	if (err) {
468 		kfree(cls_flower.rule);
469 		if (skip_sw) {
470 			NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
471 			return err;
472 		}
473 		return 0;
474 	}
475 
476 	err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
477 			      skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
478 	tc_cleanup_offload_action(&cls_flower.rule->action);
479 	kfree(cls_flower.rule);
480 
481 	if (err) {
482 		fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
483 		return err;
484 	}
485 
486 	if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
487 		return -EINVAL;
488 
489 	return 0;
490 }
491 
492 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
493 			       bool rtnl_held)
494 {
495 	struct tcf_block *block = tp->chain->block;
496 	struct flow_cls_offload cls_flower = {};
497 
498 	tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
499 	cls_flower.command = FLOW_CLS_STATS;
500 	cls_flower.cookie = (unsigned long) f;
501 	cls_flower.classid = f->res.classid;
502 
503 	tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false,
504 			 rtnl_held);
505 
506 	tcf_exts_hw_stats_update(&f->exts, cls_flower.stats.bytes,
507 				 cls_flower.stats.pkts,
508 				 cls_flower.stats.drops,
509 				 cls_flower.stats.lastused,
510 				 cls_flower.stats.used_hw_stats,
511 				 cls_flower.stats.used_hw_stats_valid);
512 }
513 
514 static void __fl_put(struct cls_fl_filter *f)
515 {
516 	if (!refcount_dec_and_test(&f->refcnt))
517 		return;
518 
519 	if (tcf_exts_get_net(&f->exts))
520 		tcf_queue_work(&f->rwork, fl_destroy_filter_work);
521 	else
522 		__fl_destroy_filter(f);
523 }
524 
525 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
526 {
527 	struct cls_fl_filter *f;
528 
529 	rcu_read_lock();
530 	f = idr_find(&head->handle_idr, handle);
531 	if (f && !refcount_inc_not_zero(&f->refcnt))
532 		f = NULL;
533 	rcu_read_unlock();
534 
535 	return f;
536 }
537 
538 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
539 		       bool *last, bool rtnl_held,
540 		       struct netlink_ext_ack *extack)
541 {
542 	struct cls_fl_head *head = fl_head_dereference(tp);
543 
544 	*last = false;
545 
546 	spin_lock(&tp->lock);
547 	if (f->deleted) {
548 		spin_unlock(&tp->lock);
549 		return -ENOENT;
550 	}
551 
552 	f->deleted = true;
553 	rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
554 			       f->mask->filter_ht_params);
555 	idr_remove(&head->handle_idr, f->handle);
556 	list_del_rcu(&f->list);
557 	spin_unlock(&tp->lock);
558 
559 	*last = fl_mask_put(head, f->mask);
560 	if (!tc_skip_hw(f->flags))
561 		fl_hw_destroy_filter(tp, f, rtnl_held, extack);
562 	tcf_unbind_filter(tp, &f->res);
563 	__fl_put(f);
564 
565 	return 0;
566 }
567 
568 static void fl_destroy_sleepable(struct work_struct *work)
569 {
570 	struct cls_fl_head *head = container_of(to_rcu_work(work),
571 						struct cls_fl_head,
572 						rwork);
573 
574 	rhashtable_destroy(&head->ht);
575 	kfree(head);
576 	module_put(THIS_MODULE);
577 }
578 
579 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
580 		       struct netlink_ext_ack *extack)
581 {
582 	struct cls_fl_head *head = fl_head_dereference(tp);
583 	struct fl_flow_mask *mask, *next_mask;
584 	struct cls_fl_filter *f, *next;
585 	bool last;
586 
587 	list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
588 		list_for_each_entry_safe(f, next, &mask->filters, list) {
589 			__fl_delete(tp, f, &last, rtnl_held, extack);
590 			if (last)
591 				break;
592 		}
593 	}
594 	idr_destroy(&head->handle_idr);
595 
596 	__module_get(THIS_MODULE);
597 	tcf_queue_work(&head->rwork, fl_destroy_sleepable);
598 }
599 
600 static void fl_put(struct tcf_proto *tp, void *arg)
601 {
602 	struct cls_fl_filter *f = arg;
603 
604 	__fl_put(f);
605 }
606 
607 static void *fl_get(struct tcf_proto *tp, u32 handle)
608 {
609 	struct cls_fl_head *head = fl_head_dereference(tp);
610 
611 	return __fl_get(head, handle);
612 }
613 
614 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
615 	[TCA_FLOWER_UNSPEC]		= { .type = NLA_UNSPEC },
616 	[TCA_FLOWER_CLASSID]		= { .type = NLA_U32 },
617 	[TCA_FLOWER_INDEV]		= { .type = NLA_STRING,
618 					    .len = IFNAMSIZ },
619 	[TCA_FLOWER_KEY_ETH_DST]	= { .len = ETH_ALEN },
620 	[TCA_FLOWER_KEY_ETH_DST_MASK]	= { .len = ETH_ALEN },
621 	[TCA_FLOWER_KEY_ETH_SRC]	= { .len = ETH_ALEN },
622 	[TCA_FLOWER_KEY_ETH_SRC_MASK]	= { .len = ETH_ALEN },
623 	[TCA_FLOWER_KEY_ETH_TYPE]	= { .type = NLA_U16 },
624 	[TCA_FLOWER_KEY_IP_PROTO]	= { .type = NLA_U8 },
625 	[TCA_FLOWER_KEY_IPV4_SRC]	= { .type = NLA_U32 },
626 	[TCA_FLOWER_KEY_IPV4_SRC_MASK]	= { .type = NLA_U32 },
627 	[TCA_FLOWER_KEY_IPV4_DST]	= { .type = NLA_U32 },
628 	[TCA_FLOWER_KEY_IPV4_DST_MASK]	= { .type = NLA_U32 },
629 	[TCA_FLOWER_KEY_IPV6_SRC]	= { .len = sizeof(struct in6_addr) },
630 	[TCA_FLOWER_KEY_IPV6_SRC_MASK]	= { .len = sizeof(struct in6_addr) },
631 	[TCA_FLOWER_KEY_IPV6_DST]	= { .len = sizeof(struct in6_addr) },
632 	[TCA_FLOWER_KEY_IPV6_DST_MASK]	= { .len = sizeof(struct in6_addr) },
633 	[TCA_FLOWER_KEY_TCP_SRC]	= { .type = NLA_U16 },
634 	[TCA_FLOWER_KEY_TCP_DST]	= { .type = NLA_U16 },
635 	[TCA_FLOWER_KEY_UDP_SRC]	= { .type = NLA_U16 },
636 	[TCA_FLOWER_KEY_UDP_DST]	= { .type = NLA_U16 },
637 	[TCA_FLOWER_KEY_VLAN_ID]	= { .type = NLA_U16 },
638 	[TCA_FLOWER_KEY_VLAN_PRIO]	= { .type = NLA_U8 },
639 	[TCA_FLOWER_KEY_VLAN_ETH_TYPE]	= { .type = NLA_U16 },
640 	[TCA_FLOWER_KEY_ENC_KEY_ID]	= { .type = NLA_U32 },
641 	[TCA_FLOWER_KEY_ENC_IPV4_SRC]	= { .type = NLA_U32 },
642 	[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
643 	[TCA_FLOWER_KEY_ENC_IPV4_DST]	= { .type = NLA_U32 },
644 	[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
645 	[TCA_FLOWER_KEY_ENC_IPV6_SRC]	= { .len = sizeof(struct in6_addr) },
646 	[TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
647 	[TCA_FLOWER_KEY_ENC_IPV6_DST]	= { .len = sizeof(struct in6_addr) },
648 	[TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
649 	[TCA_FLOWER_KEY_TCP_SRC_MASK]	= { .type = NLA_U16 },
650 	[TCA_FLOWER_KEY_TCP_DST_MASK]	= { .type = NLA_U16 },
651 	[TCA_FLOWER_KEY_UDP_SRC_MASK]	= { .type = NLA_U16 },
652 	[TCA_FLOWER_KEY_UDP_DST_MASK]	= { .type = NLA_U16 },
653 	[TCA_FLOWER_KEY_SCTP_SRC_MASK]	= { .type = NLA_U16 },
654 	[TCA_FLOWER_KEY_SCTP_DST_MASK]	= { .type = NLA_U16 },
655 	[TCA_FLOWER_KEY_SCTP_SRC]	= { .type = NLA_U16 },
656 	[TCA_FLOWER_KEY_SCTP_DST]	= { .type = NLA_U16 },
657 	[TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]	= { .type = NLA_U16 },
658 	[TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]	= { .type = NLA_U16 },
659 	[TCA_FLOWER_KEY_ENC_UDP_DST_PORT]	= { .type = NLA_U16 },
660 	[TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]	= { .type = NLA_U16 },
661 	[TCA_FLOWER_KEY_FLAGS]		= { .type = NLA_U32 },
662 	[TCA_FLOWER_KEY_FLAGS_MASK]	= { .type = NLA_U32 },
663 	[TCA_FLOWER_KEY_ICMPV4_TYPE]	= { .type = NLA_U8 },
664 	[TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
665 	[TCA_FLOWER_KEY_ICMPV4_CODE]	= { .type = NLA_U8 },
666 	[TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
667 	[TCA_FLOWER_KEY_ICMPV6_TYPE]	= { .type = NLA_U8 },
668 	[TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
669 	[TCA_FLOWER_KEY_ICMPV6_CODE]	= { .type = NLA_U8 },
670 	[TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
671 	[TCA_FLOWER_KEY_ARP_SIP]	= { .type = NLA_U32 },
672 	[TCA_FLOWER_KEY_ARP_SIP_MASK]	= { .type = NLA_U32 },
673 	[TCA_FLOWER_KEY_ARP_TIP]	= { .type = NLA_U32 },
674 	[TCA_FLOWER_KEY_ARP_TIP_MASK]	= { .type = NLA_U32 },
675 	[TCA_FLOWER_KEY_ARP_OP]		= { .type = NLA_U8 },
676 	[TCA_FLOWER_KEY_ARP_OP_MASK]	= { .type = NLA_U8 },
677 	[TCA_FLOWER_KEY_ARP_SHA]	= { .len = ETH_ALEN },
678 	[TCA_FLOWER_KEY_ARP_SHA_MASK]	= { .len = ETH_ALEN },
679 	[TCA_FLOWER_KEY_ARP_THA]	= { .len = ETH_ALEN },
680 	[TCA_FLOWER_KEY_ARP_THA_MASK]	= { .len = ETH_ALEN },
681 	[TCA_FLOWER_KEY_MPLS_TTL]	= { .type = NLA_U8 },
682 	[TCA_FLOWER_KEY_MPLS_BOS]	= { .type = NLA_U8 },
683 	[TCA_FLOWER_KEY_MPLS_TC]	= { .type = NLA_U8 },
684 	[TCA_FLOWER_KEY_MPLS_LABEL]	= { .type = NLA_U32 },
685 	[TCA_FLOWER_KEY_MPLS_OPTS]	= { .type = NLA_NESTED },
686 	[TCA_FLOWER_KEY_TCP_FLAGS]	= { .type = NLA_U16 },
687 	[TCA_FLOWER_KEY_TCP_FLAGS_MASK]	= { .type = NLA_U16 },
688 	[TCA_FLOWER_KEY_IP_TOS]		= { .type = NLA_U8 },
689 	[TCA_FLOWER_KEY_IP_TOS_MASK]	= { .type = NLA_U8 },
690 	[TCA_FLOWER_KEY_IP_TTL]		= { .type = NLA_U8 },
691 	[TCA_FLOWER_KEY_IP_TTL_MASK]	= { .type = NLA_U8 },
692 	[TCA_FLOWER_KEY_CVLAN_ID]	= { .type = NLA_U16 },
693 	[TCA_FLOWER_KEY_CVLAN_PRIO]	= { .type = NLA_U8 },
694 	[TCA_FLOWER_KEY_CVLAN_ETH_TYPE]	= { .type = NLA_U16 },
695 	[TCA_FLOWER_KEY_ENC_IP_TOS]	= { .type = NLA_U8 },
696 	[TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
697 	[TCA_FLOWER_KEY_ENC_IP_TTL]	 = { .type = NLA_U8 },
698 	[TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
699 	[TCA_FLOWER_KEY_ENC_OPTS]	= { .type = NLA_NESTED },
700 	[TCA_FLOWER_KEY_ENC_OPTS_MASK]	= { .type = NLA_NESTED },
701 	[TCA_FLOWER_KEY_CT_STATE]	=
702 		NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
703 	[TCA_FLOWER_KEY_CT_STATE_MASK]	=
704 		NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
705 	[TCA_FLOWER_KEY_CT_ZONE]	= { .type = NLA_U16 },
706 	[TCA_FLOWER_KEY_CT_ZONE_MASK]	= { .type = NLA_U16 },
707 	[TCA_FLOWER_KEY_CT_MARK]	= { .type = NLA_U32 },
708 	[TCA_FLOWER_KEY_CT_MARK_MASK]	= { .type = NLA_U32 },
709 	[TCA_FLOWER_KEY_CT_LABELS]	= { .type = NLA_BINARY,
710 					    .len = 128 / BITS_PER_BYTE },
711 	[TCA_FLOWER_KEY_CT_LABELS_MASK]	= { .type = NLA_BINARY,
712 					    .len = 128 / BITS_PER_BYTE },
713 	[TCA_FLOWER_FLAGS]		= { .type = NLA_U32 },
714 	[TCA_FLOWER_KEY_HASH]		= { .type = NLA_U32 },
715 	[TCA_FLOWER_KEY_HASH_MASK]	= { .type = NLA_U32 },
716 
717 };
718 
719 static const struct nla_policy
720 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
721 	[TCA_FLOWER_KEY_ENC_OPTS_UNSPEC]        = {
722 		.strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN },
723 	[TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
724 	[TCA_FLOWER_KEY_ENC_OPTS_VXLAN]         = { .type = NLA_NESTED },
725 	[TCA_FLOWER_KEY_ENC_OPTS_ERSPAN]        = { .type = NLA_NESTED },
726 };
727 
728 static const struct nla_policy
729 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
730 	[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
731 	[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
732 	[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
733 						       .len = 128 },
734 };
735 
736 static const struct nla_policy
737 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = {
738 	[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]         = { .type = NLA_U32 },
739 };
740 
741 static const struct nla_policy
742 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
743 	[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]        = { .type = NLA_U8 },
744 	[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]      = { .type = NLA_U32 },
745 	[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]        = { .type = NLA_U8 },
746 	[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]       = { .type = NLA_U8 },
747 };
748 
749 static const struct nla_policy
750 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = {
751 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]    = { .type = NLA_U8 },
752 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]      = { .type = NLA_U8 },
753 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]      = { .type = NLA_U8 },
754 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]       = { .type = NLA_U8 },
755 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]    = { .type = NLA_U32 },
756 };
757 
758 static void fl_set_key_val(struct nlattr **tb,
759 			   void *val, int val_type,
760 			   void *mask, int mask_type, int len)
761 {
762 	if (!tb[val_type])
763 		return;
764 	nla_memcpy(val, tb[val_type], len);
765 	if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
766 		memset(mask, 0xff, len);
767 	else
768 		nla_memcpy(mask, tb[mask_type], len);
769 }
770 
771 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
772 				 struct fl_flow_key *mask,
773 				 struct netlink_ext_ack *extack)
774 {
775 	fl_set_key_val(tb, &key->tp_range.tp_min.dst,
776 		       TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst,
777 		       TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst));
778 	fl_set_key_val(tb, &key->tp_range.tp_max.dst,
779 		       TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst,
780 		       TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst));
781 	fl_set_key_val(tb, &key->tp_range.tp_min.src,
782 		       TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src,
783 		       TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src));
784 	fl_set_key_val(tb, &key->tp_range.tp_max.src,
785 		       TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src,
786 		       TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
787 
788 	if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
789 	    ntohs(key->tp_range.tp_max.dst) <=
790 	    ntohs(key->tp_range.tp_min.dst)) {
791 		NL_SET_ERR_MSG_ATTR(extack,
792 				    tb[TCA_FLOWER_KEY_PORT_DST_MIN],
793 				    "Invalid destination port range (min must be strictly smaller than max)");
794 		return -EINVAL;
795 	}
796 	if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
797 	    ntohs(key->tp_range.tp_max.src) <=
798 	    ntohs(key->tp_range.tp_min.src)) {
799 		NL_SET_ERR_MSG_ATTR(extack,
800 				    tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
801 				    "Invalid source port range (min must be strictly smaller than max)");
802 		return -EINVAL;
803 	}
804 
805 	return 0;
806 }
807 
808 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse,
809 			       struct flow_dissector_key_mpls *key_val,
810 			       struct flow_dissector_key_mpls *key_mask,
811 			       struct netlink_ext_ack *extack)
812 {
813 	struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1];
814 	struct flow_dissector_mpls_lse *lse_mask;
815 	struct flow_dissector_mpls_lse *lse_val;
816 	u8 lse_index;
817 	u8 depth;
818 	int err;
819 
820 	err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse,
821 			       mpls_stack_entry_policy, extack);
822 	if (err < 0)
823 		return err;
824 
825 	if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) {
826 		NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\"");
827 		return -EINVAL;
828 	}
829 
830 	depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]);
831 
832 	/* LSE depth starts at 1, for consistency with terminology used by
833 	 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets.
834 	 */
835 	if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) {
836 		NL_SET_ERR_MSG_ATTR(extack,
837 				    tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH],
838 				    "Invalid MPLS depth");
839 		return -EINVAL;
840 	}
841 	lse_index = depth - 1;
842 
843 	dissector_set_mpls_lse(key_val, lse_index);
844 	dissector_set_mpls_lse(key_mask, lse_index);
845 
846 	lse_val = &key_val->ls[lse_index];
847 	lse_mask = &key_mask->ls[lse_index];
848 
849 	if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) {
850 		lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]);
851 		lse_mask->mpls_ttl = MPLS_TTL_MASK;
852 	}
853 	if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) {
854 		u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]);
855 
856 		if (bos & ~MPLS_BOS_MASK) {
857 			NL_SET_ERR_MSG_ATTR(extack,
858 					    tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS],
859 					    "Bottom Of Stack (BOS) must be 0 or 1");
860 			return -EINVAL;
861 		}
862 		lse_val->mpls_bos = bos;
863 		lse_mask->mpls_bos = MPLS_BOS_MASK;
864 	}
865 	if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) {
866 		u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]);
867 
868 		if (tc & ~MPLS_TC_MASK) {
869 			NL_SET_ERR_MSG_ATTR(extack,
870 					    tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC],
871 					    "Traffic Class (TC) must be between 0 and 7");
872 			return -EINVAL;
873 		}
874 		lse_val->mpls_tc = tc;
875 		lse_mask->mpls_tc = MPLS_TC_MASK;
876 	}
877 	if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) {
878 		u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]);
879 
880 		if (label & ~MPLS_LABEL_MASK) {
881 			NL_SET_ERR_MSG_ATTR(extack,
882 					    tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL],
883 					    "Label must be between 0 and 1048575");
884 			return -EINVAL;
885 		}
886 		lse_val->mpls_label = label;
887 		lse_mask->mpls_label = MPLS_LABEL_MASK;
888 	}
889 
890 	return 0;
891 }
892 
893 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts,
894 				struct flow_dissector_key_mpls *key_val,
895 				struct flow_dissector_key_mpls *key_mask,
896 				struct netlink_ext_ack *extack)
897 {
898 	struct nlattr *nla_lse;
899 	int rem;
900 	int err;
901 
902 	if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) {
903 		NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts,
904 				    "NLA_F_NESTED is missing");
905 		return -EINVAL;
906 	}
907 
908 	nla_for_each_nested(nla_lse, nla_mpls_opts, rem) {
909 		if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) {
910 			NL_SET_ERR_MSG_ATTR(extack, nla_lse,
911 					    "Invalid MPLS option type");
912 			return -EINVAL;
913 		}
914 
915 		err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack);
916 		if (err < 0)
917 			return err;
918 	}
919 	if (rem) {
920 		NL_SET_ERR_MSG(extack,
921 			       "Bytes leftover after parsing MPLS options");
922 		return -EINVAL;
923 	}
924 
925 	return 0;
926 }
927 
928 static int fl_set_key_mpls(struct nlattr **tb,
929 			   struct flow_dissector_key_mpls *key_val,
930 			   struct flow_dissector_key_mpls *key_mask,
931 			   struct netlink_ext_ack *extack)
932 {
933 	struct flow_dissector_mpls_lse *lse_mask;
934 	struct flow_dissector_mpls_lse *lse_val;
935 
936 	if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) {
937 		if (tb[TCA_FLOWER_KEY_MPLS_TTL] ||
938 		    tb[TCA_FLOWER_KEY_MPLS_BOS] ||
939 		    tb[TCA_FLOWER_KEY_MPLS_TC] ||
940 		    tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
941 			NL_SET_ERR_MSG_ATTR(extack,
942 					    tb[TCA_FLOWER_KEY_MPLS_OPTS],
943 					    "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute");
944 			return -EBADMSG;
945 		}
946 
947 		return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS],
948 					    key_val, key_mask, extack);
949 	}
950 
951 	lse_val = &key_val->ls[0];
952 	lse_mask = &key_mask->ls[0];
953 
954 	if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
955 		lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
956 		lse_mask->mpls_ttl = MPLS_TTL_MASK;
957 		dissector_set_mpls_lse(key_val, 0);
958 		dissector_set_mpls_lse(key_mask, 0);
959 	}
960 	if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
961 		u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
962 
963 		if (bos & ~MPLS_BOS_MASK) {
964 			NL_SET_ERR_MSG_ATTR(extack,
965 					    tb[TCA_FLOWER_KEY_MPLS_BOS],
966 					    "Bottom Of Stack (BOS) must be 0 or 1");
967 			return -EINVAL;
968 		}
969 		lse_val->mpls_bos = bos;
970 		lse_mask->mpls_bos = MPLS_BOS_MASK;
971 		dissector_set_mpls_lse(key_val, 0);
972 		dissector_set_mpls_lse(key_mask, 0);
973 	}
974 	if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
975 		u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
976 
977 		if (tc & ~MPLS_TC_MASK) {
978 			NL_SET_ERR_MSG_ATTR(extack,
979 					    tb[TCA_FLOWER_KEY_MPLS_TC],
980 					    "Traffic Class (TC) must be between 0 and 7");
981 			return -EINVAL;
982 		}
983 		lse_val->mpls_tc = tc;
984 		lse_mask->mpls_tc = MPLS_TC_MASK;
985 		dissector_set_mpls_lse(key_val, 0);
986 		dissector_set_mpls_lse(key_mask, 0);
987 	}
988 	if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
989 		u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
990 
991 		if (label & ~MPLS_LABEL_MASK) {
992 			NL_SET_ERR_MSG_ATTR(extack,
993 					    tb[TCA_FLOWER_KEY_MPLS_LABEL],
994 					    "Label must be between 0 and 1048575");
995 			return -EINVAL;
996 		}
997 		lse_val->mpls_label = label;
998 		lse_mask->mpls_label = MPLS_LABEL_MASK;
999 		dissector_set_mpls_lse(key_val, 0);
1000 		dissector_set_mpls_lse(key_mask, 0);
1001 	}
1002 	return 0;
1003 }
1004 
1005 static void fl_set_key_vlan(struct nlattr **tb,
1006 			    __be16 ethertype,
1007 			    int vlan_id_key, int vlan_prio_key,
1008 			    struct flow_dissector_key_vlan *key_val,
1009 			    struct flow_dissector_key_vlan *key_mask)
1010 {
1011 #define VLAN_PRIORITY_MASK	0x7
1012 
1013 	if (tb[vlan_id_key]) {
1014 		key_val->vlan_id =
1015 			nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
1016 		key_mask->vlan_id = VLAN_VID_MASK;
1017 	}
1018 	if (tb[vlan_prio_key]) {
1019 		key_val->vlan_priority =
1020 			nla_get_u8(tb[vlan_prio_key]) &
1021 			VLAN_PRIORITY_MASK;
1022 		key_mask->vlan_priority = VLAN_PRIORITY_MASK;
1023 	}
1024 	key_val->vlan_tpid = ethertype;
1025 	key_mask->vlan_tpid = cpu_to_be16(~0);
1026 }
1027 
1028 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
1029 			    u32 *dissector_key, u32 *dissector_mask,
1030 			    u32 flower_flag_bit, u32 dissector_flag_bit)
1031 {
1032 	if (flower_mask & flower_flag_bit) {
1033 		*dissector_mask |= dissector_flag_bit;
1034 		if (flower_key & flower_flag_bit)
1035 			*dissector_key |= dissector_flag_bit;
1036 	}
1037 }
1038 
1039 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key,
1040 			    u32 *flags_mask, struct netlink_ext_ack *extack)
1041 {
1042 	u32 key, mask;
1043 
1044 	/* mask is mandatory for flags */
1045 	if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) {
1046 		NL_SET_ERR_MSG(extack, "Missing flags mask");
1047 		return -EINVAL;
1048 	}
1049 
1050 	key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS]));
1051 	mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
1052 
1053 	*flags_key  = 0;
1054 	*flags_mask = 0;
1055 
1056 	fl_set_key_flag(key, mask, flags_key, flags_mask,
1057 			TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1058 	fl_set_key_flag(key, mask, flags_key, flags_mask,
1059 			TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1060 			FLOW_DIS_FIRST_FRAG);
1061 
1062 	return 0;
1063 }
1064 
1065 static void fl_set_key_ip(struct nlattr **tb, bool encap,
1066 			  struct flow_dissector_key_ip *key,
1067 			  struct flow_dissector_key_ip *mask)
1068 {
1069 	int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1070 	int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1071 	int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1072 	int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1073 
1074 	fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
1075 	fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
1076 }
1077 
1078 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
1079 			     int depth, int option_len,
1080 			     struct netlink_ext_ack *extack)
1081 {
1082 	struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
1083 	struct nlattr *class = NULL, *type = NULL, *data = NULL;
1084 	struct geneve_opt *opt;
1085 	int err, data_len = 0;
1086 
1087 	if (option_len > sizeof(struct geneve_opt))
1088 		data_len = option_len - sizeof(struct geneve_opt);
1089 
1090 	opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
1091 	memset(opt, 0xff, option_len);
1092 	opt->length = data_len / 4;
1093 	opt->r1 = 0;
1094 	opt->r2 = 0;
1095 	opt->r3 = 0;
1096 
1097 	/* If no mask has been prodived we assume an exact match. */
1098 	if (!depth)
1099 		return sizeof(struct geneve_opt) + data_len;
1100 
1101 	if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
1102 		NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
1103 		return -EINVAL;
1104 	}
1105 
1106 	err = nla_parse_nested_deprecated(tb,
1107 					  TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
1108 					  nla, geneve_opt_policy, extack);
1109 	if (err < 0)
1110 		return err;
1111 
1112 	/* We are not allowed to omit any of CLASS, TYPE or DATA
1113 	 * fields from the key.
1114 	 */
1115 	if (!option_len &&
1116 	    (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
1117 	     !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
1118 	     !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
1119 		NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
1120 		return -EINVAL;
1121 	}
1122 
1123 	/* Omitting any of CLASS, TYPE or DATA fields is allowed
1124 	 * for the mask.
1125 	 */
1126 	if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
1127 		int new_len = key->enc_opts.len;
1128 
1129 		data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
1130 		data_len = nla_len(data);
1131 		if (data_len < 4) {
1132 			NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
1133 			return -ERANGE;
1134 		}
1135 		if (data_len % 4) {
1136 			NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
1137 			return -ERANGE;
1138 		}
1139 
1140 		new_len += sizeof(struct geneve_opt) + data_len;
1141 		BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
1142 		if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
1143 			NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
1144 			return -ERANGE;
1145 		}
1146 		opt->length = data_len / 4;
1147 		memcpy(opt->opt_data, nla_data(data), data_len);
1148 	}
1149 
1150 	if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
1151 		class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
1152 		opt->opt_class = nla_get_be16(class);
1153 	}
1154 
1155 	if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
1156 		type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
1157 		opt->type = nla_get_u8(type);
1158 	}
1159 
1160 	return sizeof(struct geneve_opt) + data_len;
1161 }
1162 
1163 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1164 			    int depth, int option_len,
1165 			    struct netlink_ext_ack *extack)
1166 {
1167 	struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1];
1168 	struct vxlan_metadata *md;
1169 	int err;
1170 
1171 	md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1172 	memset(md, 0xff, sizeof(*md));
1173 
1174 	if (!depth)
1175 		return sizeof(*md);
1176 
1177 	if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) {
1178 		NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask");
1179 		return -EINVAL;
1180 	}
1181 
1182 	err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla,
1183 			       vxlan_opt_policy, extack);
1184 	if (err < 0)
1185 		return err;
1186 
1187 	if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1188 		NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
1189 		return -EINVAL;
1190 	}
1191 
1192 	if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1193 		md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]);
1194 		md->gbp &= VXLAN_GBP_MASK;
1195 	}
1196 
1197 	return sizeof(*md);
1198 }
1199 
1200 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1201 			     int depth, int option_len,
1202 			     struct netlink_ext_ack *extack)
1203 {
1204 	struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1];
1205 	struct erspan_metadata *md;
1206 	int err;
1207 
1208 	md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1209 	memset(md, 0xff, sizeof(*md));
1210 	md->version = 1;
1211 
1212 	if (!depth)
1213 		return sizeof(*md);
1214 
1215 	if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) {
1216 		NL_SET_ERR_MSG(extack, "Non-erspan option type for mask");
1217 		return -EINVAL;
1218 	}
1219 
1220 	err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla,
1221 			       erspan_opt_policy, extack);
1222 	if (err < 0)
1223 		return err;
1224 
1225 	if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) {
1226 		NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
1227 		return -EINVAL;
1228 	}
1229 
1230 	if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER])
1231 		md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]);
1232 
1233 	if (md->version == 1) {
1234 		if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1235 			NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
1236 			return -EINVAL;
1237 		}
1238 		if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1239 			nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
1240 			memset(&md->u, 0x00, sizeof(md->u));
1241 			md->u.index = nla_get_be32(nla);
1242 		}
1243 	} else if (md->version == 2) {
1244 		if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] ||
1245 				    !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) {
1246 			NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
1247 			return -EINVAL;
1248 		}
1249 		if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) {
1250 			nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR];
1251 			md->u.md2.dir = nla_get_u8(nla);
1252 		}
1253 		if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) {
1254 			nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID];
1255 			set_hwid(&md->u.md2, nla_get_u8(nla));
1256 		}
1257 	} else {
1258 		NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
1259 		return -EINVAL;
1260 	}
1261 
1262 	return sizeof(*md);
1263 }
1264 
1265 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
1266 			  struct fl_flow_key *mask,
1267 			  struct netlink_ext_ack *extack)
1268 {
1269 	const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
1270 	int err, option_len, key_depth, msk_depth = 0;
1271 
1272 	err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
1273 					     TCA_FLOWER_KEY_ENC_OPTS_MAX,
1274 					     enc_opts_policy, extack);
1275 	if (err)
1276 		return err;
1277 
1278 	nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
1279 
1280 	if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
1281 		err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
1282 						     TCA_FLOWER_KEY_ENC_OPTS_MAX,
1283 						     enc_opts_policy, extack);
1284 		if (err)
1285 			return err;
1286 
1287 		nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1288 		msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1289 		if (!nla_ok(nla_opt_msk, msk_depth)) {
1290 			NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks");
1291 			return -EINVAL;
1292 		}
1293 	}
1294 
1295 	nla_for_each_attr(nla_opt_key, nla_enc_key,
1296 			  nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
1297 		switch (nla_type(nla_opt_key)) {
1298 		case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
1299 			if (key->enc_opts.dst_opt_type &&
1300 			    key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) {
1301 				NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
1302 				return -EINVAL;
1303 			}
1304 			option_len = 0;
1305 			key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1306 			option_len = fl_set_geneve_opt(nla_opt_key, key,
1307 						       key_depth, option_len,
1308 						       extack);
1309 			if (option_len < 0)
1310 				return option_len;
1311 
1312 			key->enc_opts.len += option_len;
1313 			/* At the same time we need to parse through the mask
1314 			 * in order to verify exact and mask attribute lengths.
1315 			 */
1316 			mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1317 			option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1318 						       msk_depth, option_len,
1319 						       extack);
1320 			if (option_len < 0)
1321 				return option_len;
1322 
1323 			mask->enc_opts.len += option_len;
1324 			if (key->enc_opts.len != mask->enc_opts.len) {
1325 				NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1326 				return -EINVAL;
1327 			}
1328 			break;
1329 		case TCA_FLOWER_KEY_ENC_OPTS_VXLAN:
1330 			if (key->enc_opts.dst_opt_type) {
1331 				NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
1332 				return -EINVAL;
1333 			}
1334 			option_len = 0;
1335 			key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1336 			option_len = fl_set_vxlan_opt(nla_opt_key, key,
1337 						      key_depth, option_len,
1338 						      extack);
1339 			if (option_len < 0)
1340 				return option_len;
1341 
1342 			key->enc_opts.len += option_len;
1343 			/* At the same time we need to parse through the mask
1344 			 * in order to verify exact and mask attribute lengths.
1345 			 */
1346 			mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1347 			option_len = fl_set_vxlan_opt(nla_opt_msk, mask,
1348 						      msk_depth, option_len,
1349 						      extack);
1350 			if (option_len < 0)
1351 				return option_len;
1352 
1353 			mask->enc_opts.len += option_len;
1354 			if (key->enc_opts.len != mask->enc_opts.len) {
1355 				NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1356 				return -EINVAL;
1357 			}
1358 			break;
1359 		case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN:
1360 			if (key->enc_opts.dst_opt_type) {
1361 				NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
1362 				return -EINVAL;
1363 			}
1364 			option_len = 0;
1365 			key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1366 			option_len = fl_set_erspan_opt(nla_opt_key, key,
1367 						       key_depth, option_len,
1368 						       extack);
1369 			if (option_len < 0)
1370 				return option_len;
1371 
1372 			key->enc_opts.len += option_len;
1373 			/* At the same time we need to parse through the mask
1374 			 * in order to verify exact and mask attribute lengths.
1375 			 */
1376 			mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1377 			option_len = fl_set_erspan_opt(nla_opt_msk, mask,
1378 						       msk_depth, option_len,
1379 						       extack);
1380 			if (option_len < 0)
1381 				return option_len;
1382 
1383 			mask->enc_opts.len += option_len;
1384 			if (key->enc_opts.len != mask->enc_opts.len) {
1385 				NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1386 				return -EINVAL;
1387 			}
1388 			break;
1389 		default:
1390 			NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1391 			return -EINVAL;
1392 		}
1393 
1394 		if (!msk_depth)
1395 			continue;
1396 
1397 		if (!nla_ok(nla_opt_msk, msk_depth)) {
1398 			NL_SET_ERR_MSG(extack, "A mask attribute is invalid");
1399 			return -EINVAL;
1400 		}
1401 		nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1402 	}
1403 
1404 	return 0;
1405 }
1406 
1407 static int fl_validate_ct_state(u16 state, struct nlattr *tb,
1408 				struct netlink_ext_ack *extack)
1409 {
1410 	if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) {
1411 		NL_SET_ERR_MSG_ATTR(extack, tb,
1412 				    "no trk, so no other flag can be set");
1413 		return -EINVAL;
1414 	}
1415 
1416 	if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1417 	    state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
1418 		NL_SET_ERR_MSG_ATTR(extack, tb,
1419 				    "new and est are mutually exclusive");
1420 		return -EINVAL;
1421 	}
1422 
1423 	if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID &&
1424 	    state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
1425 		      TCA_FLOWER_KEY_CT_FLAGS_INVALID)) {
1426 		NL_SET_ERR_MSG_ATTR(extack, tb,
1427 				    "when inv is set, only trk may be set");
1428 		return -EINVAL;
1429 	}
1430 
1431 	if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1432 	    state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) {
1433 		NL_SET_ERR_MSG_ATTR(extack, tb,
1434 				    "new and rpl are mutually exclusive");
1435 		return -EINVAL;
1436 	}
1437 
1438 	return 0;
1439 }
1440 
1441 static int fl_set_key_ct(struct nlattr **tb,
1442 			 struct flow_dissector_key_ct *key,
1443 			 struct flow_dissector_key_ct *mask,
1444 			 struct netlink_ext_ack *extack)
1445 {
1446 	if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1447 		int err;
1448 
1449 		if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1450 			NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1451 			return -EOPNOTSUPP;
1452 		}
1453 		fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1454 			       &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1455 			       sizeof(key->ct_state));
1456 
1457 		err = fl_validate_ct_state(key->ct_state & mask->ct_state,
1458 					   tb[TCA_FLOWER_KEY_CT_STATE_MASK],
1459 					   extack);
1460 		if (err)
1461 			return err;
1462 
1463 	}
1464 	if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1465 		if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1466 			NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1467 			return -EOPNOTSUPP;
1468 		}
1469 		fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1470 			       &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1471 			       sizeof(key->ct_zone));
1472 	}
1473 	if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1474 		if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1475 			NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1476 			return -EOPNOTSUPP;
1477 		}
1478 		fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1479 			       &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1480 			       sizeof(key->ct_mark));
1481 	}
1482 	if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1483 		if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1484 			NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1485 			return -EOPNOTSUPP;
1486 		}
1487 		fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1488 			       mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1489 			       sizeof(key->ct_labels));
1490 	}
1491 
1492 	return 0;
1493 }
1494 
1495 static int fl_set_key(struct net *net, struct nlattr **tb,
1496 		      struct fl_flow_key *key, struct fl_flow_key *mask,
1497 		      struct netlink_ext_ack *extack)
1498 {
1499 	__be16 ethertype;
1500 	int ret = 0;
1501 
1502 	if (tb[TCA_FLOWER_INDEV]) {
1503 		int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1504 		if (err < 0)
1505 			return err;
1506 		key->meta.ingress_ifindex = err;
1507 		mask->meta.ingress_ifindex = 0xffffffff;
1508 	}
1509 
1510 	fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1511 		       mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1512 		       sizeof(key->eth.dst));
1513 	fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1514 		       mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1515 		       sizeof(key->eth.src));
1516 
1517 	if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
1518 		ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
1519 
1520 		if (eth_type_vlan(ethertype)) {
1521 			fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1522 					TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
1523 					&mask->vlan);
1524 
1525 			if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
1526 				ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
1527 				if (eth_type_vlan(ethertype)) {
1528 					fl_set_key_vlan(tb, ethertype,
1529 							TCA_FLOWER_KEY_CVLAN_ID,
1530 							TCA_FLOWER_KEY_CVLAN_PRIO,
1531 							&key->cvlan, &mask->cvlan);
1532 					fl_set_key_val(tb, &key->basic.n_proto,
1533 						       TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1534 						       &mask->basic.n_proto,
1535 						       TCA_FLOWER_UNSPEC,
1536 						       sizeof(key->basic.n_proto));
1537 				} else {
1538 					key->basic.n_proto = ethertype;
1539 					mask->basic.n_proto = cpu_to_be16(~0);
1540 				}
1541 			}
1542 		} else {
1543 			key->basic.n_proto = ethertype;
1544 			mask->basic.n_proto = cpu_to_be16(~0);
1545 		}
1546 	}
1547 
1548 	if (key->basic.n_proto == htons(ETH_P_IP) ||
1549 	    key->basic.n_proto == htons(ETH_P_IPV6)) {
1550 		fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1551 			       &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1552 			       sizeof(key->basic.ip_proto));
1553 		fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1554 	}
1555 
1556 	if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1557 		key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1558 		mask->control.addr_type = ~0;
1559 		fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1560 			       &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1561 			       sizeof(key->ipv4.src));
1562 		fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1563 			       &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1564 			       sizeof(key->ipv4.dst));
1565 	} else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1566 		key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1567 		mask->control.addr_type = ~0;
1568 		fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1569 			       &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1570 			       sizeof(key->ipv6.src));
1571 		fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1572 			       &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1573 			       sizeof(key->ipv6.dst));
1574 	}
1575 
1576 	if (key->basic.ip_proto == IPPROTO_TCP) {
1577 		fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1578 			       &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1579 			       sizeof(key->tp.src));
1580 		fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1581 			       &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1582 			       sizeof(key->tp.dst));
1583 		fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1584 			       &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1585 			       sizeof(key->tcp.flags));
1586 	} else if (key->basic.ip_proto == IPPROTO_UDP) {
1587 		fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1588 			       &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1589 			       sizeof(key->tp.src));
1590 		fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1591 			       &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1592 			       sizeof(key->tp.dst));
1593 	} else if (key->basic.ip_proto == IPPROTO_SCTP) {
1594 		fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1595 			       &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1596 			       sizeof(key->tp.src));
1597 		fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1598 			       &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1599 			       sizeof(key->tp.dst));
1600 	} else if (key->basic.n_proto == htons(ETH_P_IP) &&
1601 		   key->basic.ip_proto == IPPROTO_ICMP) {
1602 		fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1603 			       &mask->icmp.type,
1604 			       TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1605 			       sizeof(key->icmp.type));
1606 		fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1607 			       &mask->icmp.code,
1608 			       TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1609 			       sizeof(key->icmp.code));
1610 	} else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1611 		   key->basic.ip_proto == IPPROTO_ICMPV6) {
1612 		fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1613 			       &mask->icmp.type,
1614 			       TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1615 			       sizeof(key->icmp.type));
1616 		fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1617 			       &mask->icmp.code,
1618 			       TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1619 			       sizeof(key->icmp.code));
1620 	} else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1621 		   key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1622 		ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack);
1623 		if (ret)
1624 			return ret;
1625 	} else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1626 		   key->basic.n_proto == htons(ETH_P_RARP)) {
1627 		fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1628 			       &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1629 			       sizeof(key->arp.sip));
1630 		fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1631 			       &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1632 			       sizeof(key->arp.tip));
1633 		fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1634 			       &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1635 			       sizeof(key->arp.op));
1636 		fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1637 			       mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1638 			       sizeof(key->arp.sha));
1639 		fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1640 			       mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1641 			       sizeof(key->arp.tha));
1642 	}
1643 
1644 	if (key->basic.ip_proto == IPPROTO_TCP ||
1645 	    key->basic.ip_proto == IPPROTO_UDP ||
1646 	    key->basic.ip_proto == IPPROTO_SCTP) {
1647 		ret = fl_set_key_port_range(tb, key, mask, extack);
1648 		if (ret)
1649 			return ret;
1650 	}
1651 
1652 	if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1653 	    tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1654 		key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1655 		mask->enc_control.addr_type = ~0;
1656 		fl_set_key_val(tb, &key->enc_ipv4.src,
1657 			       TCA_FLOWER_KEY_ENC_IPV4_SRC,
1658 			       &mask->enc_ipv4.src,
1659 			       TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1660 			       sizeof(key->enc_ipv4.src));
1661 		fl_set_key_val(tb, &key->enc_ipv4.dst,
1662 			       TCA_FLOWER_KEY_ENC_IPV4_DST,
1663 			       &mask->enc_ipv4.dst,
1664 			       TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1665 			       sizeof(key->enc_ipv4.dst));
1666 	}
1667 
1668 	if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1669 	    tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1670 		key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1671 		mask->enc_control.addr_type = ~0;
1672 		fl_set_key_val(tb, &key->enc_ipv6.src,
1673 			       TCA_FLOWER_KEY_ENC_IPV6_SRC,
1674 			       &mask->enc_ipv6.src,
1675 			       TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1676 			       sizeof(key->enc_ipv6.src));
1677 		fl_set_key_val(tb, &key->enc_ipv6.dst,
1678 			       TCA_FLOWER_KEY_ENC_IPV6_DST,
1679 			       &mask->enc_ipv6.dst,
1680 			       TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1681 			       sizeof(key->enc_ipv6.dst));
1682 	}
1683 
1684 	fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1685 		       &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1686 		       sizeof(key->enc_key_id.keyid));
1687 
1688 	fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1689 		       &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1690 		       sizeof(key->enc_tp.src));
1691 
1692 	fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1693 		       &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1694 		       sizeof(key->enc_tp.dst));
1695 
1696 	fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1697 
1698 	fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
1699 		       &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
1700 		       sizeof(key->hash.hash));
1701 
1702 	if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1703 		ret = fl_set_enc_opt(tb, key, mask, extack);
1704 		if (ret)
1705 			return ret;
1706 	}
1707 
1708 	ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1709 	if (ret)
1710 		return ret;
1711 
1712 	if (tb[TCA_FLOWER_KEY_FLAGS])
1713 		ret = fl_set_key_flags(tb, &key->control.flags,
1714 				       &mask->control.flags, extack);
1715 
1716 	return ret;
1717 }
1718 
1719 static void fl_mask_copy(struct fl_flow_mask *dst,
1720 			 struct fl_flow_mask *src)
1721 {
1722 	const void *psrc = fl_key_get_start(&src->key, src);
1723 	void *pdst = fl_key_get_start(&dst->key, src);
1724 
1725 	memcpy(pdst, psrc, fl_mask_range(src));
1726 	dst->range = src->range;
1727 }
1728 
1729 static const struct rhashtable_params fl_ht_params = {
1730 	.key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1731 	.head_offset = offsetof(struct cls_fl_filter, ht_node),
1732 	.automatic_shrinking = true,
1733 };
1734 
1735 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1736 {
1737 	mask->filter_ht_params = fl_ht_params;
1738 	mask->filter_ht_params.key_len = fl_mask_range(mask);
1739 	mask->filter_ht_params.key_offset += mask->range.start;
1740 
1741 	return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1742 }
1743 
1744 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1745 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member)
1746 
1747 #define FL_KEY_IS_MASKED(mask, member)						\
1748 	memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),		\
1749 		   0, FL_KEY_MEMBER_SIZE(member))				\
1750 
1751 #define FL_KEY_SET(keys, cnt, id, member)					\
1752 	do {									\
1753 		keys[cnt].key_id = id;						\
1754 		keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);		\
1755 		cnt++;								\
1756 	} while(0);
1757 
1758 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)			\
1759 	do {									\
1760 		if (FL_KEY_IS_MASKED(mask, member))				\
1761 			FL_KEY_SET(keys, cnt, id, member);			\
1762 	} while(0);
1763 
1764 static void fl_init_dissector(struct flow_dissector *dissector,
1765 			      struct fl_flow_key *mask)
1766 {
1767 	struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1768 	size_t cnt = 0;
1769 
1770 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1771 			     FLOW_DISSECTOR_KEY_META, meta);
1772 	FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1773 	FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1774 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1775 			     FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1776 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1777 			     FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1778 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1779 			     FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1780 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1781 			     FLOW_DISSECTOR_KEY_PORTS, tp);
1782 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1783 			     FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
1784 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1785 			     FLOW_DISSECTOR_KEY_IP, ip);
1786 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1787 			     FLOW_DISSECTOR_KEY_TCP, tcp);
1788 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1789 			     FLOW_DISSECTOR_KEY_ICMP, icmp);
1790 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1791 			     FLOW_DISSECTOR_KEY_ARP, arp);
1792 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1793 			     FLOW_DISSECTOR_KEY_MPLS, mpls);
1794 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1795 			     FLOW_DISSECTOR_KEY_VLAN, vlan);
1796 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1797 			     FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1798 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1799 			     FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1800 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1801 			     FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1802 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1803 			     FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1804 	if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1805 	    FL_KEY_IS_MASKED(mask, enc_ipv6))
1806 		FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1807 			   enc_control);
1808 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1809 			     FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1810 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1811 			     FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1812 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1813 			     FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1814 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1815 			     FLOW_DISSECTOR_KEY_CT, ct);
1816 	FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1817 			     FLOW_DISSECTOR_KEY_HASH, hash);
1818 
1819 	skb_flow_dissector_init(dissector, keys, cnt);
1820 }
1821 
1822 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1823 					       struct fl_flow_mask *mask)
1824 {
1825 	struct fl_flow_mask *newmask;
1826 	int err;
1827 
1828 	newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1829 	if (!newmask)
1830 		return ERR_PTR(-ENOMEM);
1831 
1832 	fl_mask_copy(newmask, mask);
1833 
1834 	if ((newmask->key.tp_range.tp_min.dst &&
1835 	     newmask->key.tp_range.tp_max.dst) ||
1836 	    (newmask->key.tp_range.tp_min.src &&
1837 	     newmask->key.tp_range.tp_max.src))
1838 		newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1839 
1840 	err = fl_init_mask_hashtable(newmask);
1841 	if (err)
1842 		goto errout_free;
1843 
1844 	fl_init_dissector(&newmask->dissector, &newmask->key);
1845 
1846 	INIT_LIST_HEAD_RCU(&newmask->filters);
1847 
1848 	refcount_set(&newmask->refcnt, 1);
1849 	err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
1850 				      &newmask->ht_node, mask_ht_params);
1851 	if (err)
1852 		goto errout_destroy;
1853 
1854 	spin_lock(&head->masks_lock);
1855 	list_add_tail_rcu(&newmask->list, &head->masks);
1856 	spin_unlock(&head->masks_lock);
1857 
1858 	return newmask;
1859 
1860 errout_destroy:
1861 	rhashtable_destroy(&newmask->ht);
1862 errout_free:
1863 	kfree(newmask);
1864 
1865 	return ERR_PTR(err);
1866 }
1867 
1868 static int fl_check_assign_mask(struct cls_fl_head *head,
1869 				struct cls_fl_filter *fnew,
1870 				struct cls_fl_filter *fold,
1871 				struct fl_flow_mask *mask)
1872 {
1873 	struct fl_flow_mask *newmask;
1874 	int ret = 0;
1875 
1876 	rcu_read_lock();
1877 
1878 	/* Insert mask as temporary node to prevent concurrent creation of mask
1879 	 * with same key. Any concurrent lookups with same key will return
1880 	 * -EAGAIN because mask's refcnt is zero.
1881 	 */
1882 	fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
1883 						       &mask->ht_node,
1884 						       mask_ht_params);
1885 	if (!fnew->mask) {
1886 		rcu_read_unlock();
1887 
1888 		if (fold) {
1889 			ret = -EINVAL;
1890 			goto errout_cleanup;
1891 		}
1892 
1893 		newmask = fl_create_new_mask(head, mask);
1894 		if (IS_ERR(newmask)) {
1895 			ret = PTR_ERR(newmask);
1896 			goto errout_cleanup;
1897 		}
1898 
1899 		fnew->mask = newmask;
1900 		return 0;
1901 	} else if (IS_ERR(fnew->mask)) {
1902 		ret = PTR_ERR(fnew->mask);
1903 	} else if (fold && fold->mask != fnew->mask) {
1904 		ret = -EINVAL;
1905 	} else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
1906 		/* Mask was deleted concurrently, try again */
1907 		ret = -EAGAIN;
1908 	}
1909 	rcu_read_unlock();
1910 	return ret;
1911 
1912 errout_cleanup:
1913 	rhashtable_remove_fast(&head->ht, &mask->ht_node,
1914 			       mask_ht_params);
1915 	return ret;
1916 }
1917 
1918 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1919 			struct cls_fl_filter *f, struct fl_flow_mask *mask,
1920 			unsigned long base, struct nlattr **tb,
1921 			struct nlattr *est,
1922 			struct fl_flow_tmplt *tmplt,
1923 			u32 flags, u32 fl_flags,
1924 			struct netlink_ext_ack *extack)
1925 {
1926 	int err;
1927 
1928 	err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags,
1929 				   fl_flags, extack);
1930 	if (err < 0)
1931 		return err;
1932 
1933 	if (tb[TCA_FLOWER_CLASSID]) {
1934 		f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1935 		if (flags & TCA_ACT_FLAGS_NO_RTNL)
1936 			rtnl_lock();
1937 		tcf_bind_filter(tp, &f->res, base);
1938 		if (flags & TCA_ACT_FLAGS_NO_RTNL)
1939 			rtnl_unlock();
1940 	}
1941 
1942 	err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1943 	if (err)
1944 		return err;
1945 
1946 	fl_mask_update_range(mask);
1947 	fl_set_masked_key(&f->mkey, &f->key, mask);
1948 
1949 	if (!fl_mask_fits_tmplt(tmplt, mask)) {
1950 		NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1951 		return -EINVAL;
1952 	}
1953 
1954 	return 0;
1955 }
1956 
1957 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
1958 			       struct cls_fl_filter *fold,
1959 			       bool *in_ht)
1960 {
1961 	struct fl_flow_mask *mask = fnew->mask;
1962 	int err;
1963 
1964 	err = rhashtable_lookup_insert_fast(&mask->ht,
1965 					    &fnew->ht_node,
1966 					    mask->filter_ht_params);
1967 	if (err) {
1968 		*in_ht = false;
1969 		/* It is okay if filter with same key exists when
1970 		 * overwriting.
1971 		 */
1972 		return fold && err == -EEXIST ? 0 : err;
1973 	}
1974 
1975 	*in_ht = true;
1976 	return 0;
1977 }
1978 
1979 static int fl_change(struct net *net, struct sk_buff *in_skb,
1980 		     struct tcf_proto *tp, unsigned long base,
1981 		     u32 handle, struct nlattr **tca,
1982 		     void **arg, u32 flags,
1983 		     struct netlink_ext_ack *extack)
1984 {
1985 	struct cls_fl_head *head = fl_head_dereference(tp);
1986 	bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL);
1987 	struct cls_fl_filter *fold = *arg;
1988 	struct cls_fl_filter *fnew;
1989 	struct fl_flow_mask *mask;
1990 	struct nlattr **tb;
1991 	bool in_ht;
1992 	int err;
1993 
1994 	if (!tca[TCA_OPTIONS]) {
1995 		err = -EINVAL;
1996 		goto errout_fold;
1997 	}
1998 
1999 	mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
2000 	if (!mask) {
2001 		err = -ENOBUFS;
2002 		goto errout_fold;
2003 	}
2004 
2005 	tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2006 	if (!tb) {
2007 		err = -ENOBUFS;
2008 		goto errout_mask_alloc;
2009 	}
2010 
2011 	err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2012 					  tca[TCA_OPTIONS], fl_policy, NULL);
2013 	if (err < 0)
2014 		goto errout_tb;
2015 
2016 	if (fold && handle && fold->handle != handle) {
2017 		err = -EINVAL;
2018 		goto errout_tb;
2019 	}
2020 
2021 	fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
2022 	if (!fnew) {
2023 		err = -ENOBUFS;
2024 		goto errout_tb;
2025 	}
2026 	INIT_LIST_HEAD(&fnew->hw_list);
2027 	refcount_set(&fnew->refcnt, 1);
2028 
2029 	err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
2030 	if (err < 0)
2031 		goto errout;
2032 
2033 	if (tb[TCA_FLOWER_FLAGS]) {
2034 		fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
2035 
2036 		if (!tc_flags_valid(fnew->flags)) {
2037 			err = -EINVAL;
2038 			goto errout;
2039 		}
2040 	}
2041 
2042 	err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE],
2043 			   tp->chain->tmplt_priv, flags, fnew->flags,
2044 			   extack);
2045 	if (err)
2046 		goto errout;
2047 
2048 	err = fl_check_assign_mask(head, fnew, fold, mask);
2049 	if (err)
2050 		goto errout;
2051 
2052 	err = fl_ht_insert_unique(fnew, fold, &in_ht);
2053 	if (err)
2054 		goto errout_mask;
2055 
2056 	if (!tc_skip_hw(fnew->flags)) {
2057 		err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
2058 		if (err)
2059 			goto errout_ht;
2060 	}
2061 
2062 	if (!tc_in_hw(fnew->flags))
2063 		fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
2064 
2065 	spin_lock(&tp->lock);
2066 
2067 	/* tp was deleted concurrently. -EAGAIN will cause caller to lookup
2068 	 * proto again or create new one, if necessary.
2069 	 */
2070 	if (tp->deleting) {
2071 		err = -EAGAIN;
2072 		goto errout_hw;
2073 	}
2074 
2075 	if (fold) {
2076 		/* Fold filter was deleted concurrently. Retry lookup. */
2077 		if (fold->deleted) {
2078 			err = -EAGAIN;
2079 			goto errout_hw;
2080 		}
2081 
2082 		fnew->handle = handle;
2083 
2084 		if (!in_ht) {
2085 			struct rhashtable_params params =
2086 				fnew->mask->filter_ht_params;
2087 
2088 			err = rhashtable_insert_fast(&fnew->mask->ht,
2089 						     &fnew->ht_node,
2090 						     params);
2091 			if (err)
2092 				goto errout_hw;
2093 			in_ht = true;
2094 		}
2095 
2096 		refcount_inc(&fnew->refcnt);
2097 		rhashtable_remove_fast(&fold->mask->ht,
2098 				       &fold->ht_node,
2099 				       fold->mask->filter_ht_params);
2100 		idr_replace(&head->handle_idr, fnew, fnew->handle);
2101 		list_replace_rcu(&fold->list, &fnew->list);
2102 		fold->deleted = true;
2103 
2104 		spin_unlock(&tp->lock);
2105 
2106 		fl_mask_put(head, fold->mask);
2107 		if (!tc_skip_hw(fold->flags))
2108 			fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
2109 		tcf_unbind_filter(tp, &fold->res);
2110 		/* Caller holds reference to fold, so refcnt is always > 0
2111 		 * after this.
2112 		 */
2113 		refcount_dec(&fold->refcnt);
2114 		__fl_put(fold);
2115 	} else {
2116 		if (handle) {
2117 			/* user specifies a handle and it doesn't exist */
2118 			err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
2119 					    handle, GFP_ATOMIC);
2120 
2121 			/* Filter with specified handle was concurrently
2122 			 * inserted after initial check in cls_api. This is not
2123 			 * necessarily an error if NLM_F_EXCL is not set in
2124 			 * message flags. Returning EAGAIN will cause cls_api to
2125 			 * try to update concurrently inserted rule.
2126 			 */
2127 			if (err == -ENOSPC)
2128 				err = -EAGAIN;
2129 		} else {
2130 			handle = 1;
2131 			err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
2132 					    INT_MAX, GFP_ATOMIC);
2133 		}
2134 		if (err)
2135 			goto errout_hw;
2136 
2137 		refcount_inc(&fnew->refcnt);
2138 		fnew->handle = handle;
2139 		list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
2140 		spin_unlock(&tp->lock);
2141 	}
2142 
2143 	*arg = fnew;
2144 
2145 	kfree(tb);
2146 	tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2147 	return 0;
2148 
2149 errout_ht:
2150 	spin_lock(&tp->lock);
2151 errout_hw:
2152 	fnew->deleted = true;
2153 	spin_unlock(&tp->lock);
2154 	if (!tc_skip_hw(fnew->flags))
2155 		fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
2156 	if (in_ht)
2157 		rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
2158 				       fnew->mask->filter_ht_params);
2159 errout_mask:
2160 	fl_mask_put(head, fnew->mask);
2161 errout:
2162 	__fl_put(fnew);
2163 errout_tb:
2164 	kfree(tb);
2165 errout_mask_alloc:
2166 	tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2167 errout_fold:
2168 	if (fold)
2169 		__fl_put(fold);
2170 	return err;
2171 }
2172 
2173 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
2174 		     bool rtnl_held, struct netlink_ext_ack *extack)
2175 {
2176 	struct cls_fl_head *head = fl_head_dereference(tp);
2177 	struct cls_fl_filter *f = arg;
2178 	bool last_on_mask;
2179 	int err = 0;
2180 
2181 	err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
2182 	*last = list_empty(&head->masks);
2183 	__fl_put(f);
2184 
2185 	return err;
2186 }
2187 
2188 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
2189 		    bool rtnl_held)
2190 {
2191 	struct cls_fl_head *head = fl_head_dereference(tp);
2192 	unsigned long id = arg->cookie, tmp;
2193 	struct cls_fl_filter *f;
2194 
2195 	arg->count = arg->skip;
2196 
2197 	rcu_read_lock();
2198 	idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
2199 		/* don't return filters that are being deleted */
2200 		if (!refcount_inc_not_zero(&f->refcnt))
2201 			continue;
2202 		rcu_read_unlock();
2203 
2204 		if (arg->fn(tp, f, arg) < 0) {
2205 			__fl_put(f);
2206 			arg->stop = 1;
2207 			rcu_read_lock();
2208 			break;
2209 		}
2210 		__fl_put(f);
2211 		arg->count++;
2212 		rcu_read_lock();
2213 	}
2214 	rcu_read_unlock();
2215 	arg->cookie = id;
2216 }
2217 
2218 static struct cls_fl_filter *
2219 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
2220 {
2221 	struct cls_fl_head *head = fl_head_dereference(tp);
2222 
2223 	spin_lock(&tp->lock);
2224 	if (list_empty(&head->hw_filters)) {
2225 		spin_unlock(&tp->lock);
2226 		return NULL;
2227 	}
2228 
2229 	if (!f)
2230 		f = list_entry(&head->hw_filters, struct cls_fl_filter,
2231 			       hw_list);
2232 	list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
2233 		if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
2234 			spin_unlock(&tp->lock);
2235 			return f;
2236 		}
2237 	}
2238 
2239 	spin_unlock(&tp->lock);
2240 	return NULL;
2241 }
2242 
2243 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
2244 			void *cb_priv, struct netlink_ext_ack *extack)
2245 {
2246 	struct tcf_block *block = tp->chain->block;
2247 	struct flow_cls_offload cls_flower = {};
2248 	struct cls_fl_filter *f = NULL;
2249 	int err;
2250 
2251 	/* hw_filters list can only be changed by hw offload functions after
2252 	 * obtaining rtnl lock. Make sure it is not changed while reoffload is
2253 	 * iterating it.
2254 	 */
2255 	ASSERT_RTNL();
2256 
2257 	while ((f = fl_get_next_hw_filter(tp, f, add))) {
2258 		cls_flower.rule =
2259 			flow_rule_alloc(tcf_exts_num_actions(&f->exts));
2260 		if (!cls_flower.rule) {
2261 			__fl_put(f);
2262 			return -ENOMEM;
2263 		}
2264 
2265 		tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
2266 					   extack);
2267 		cls_flower.command = add ?
2268 			FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
2269 		cls_flower.cookie = (unsigned long)f;
2270 		cls_flower.rule->match.dissector = &f->mask->dissector;
2271 		cls_flower.rule->match.mask = &f->mask->key;
2272 		cls_flower.rule->match.key = &f->mkey;
2273 
2274 		err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts);
2275 		if (err) {
2276 			kfree(cls_flower.rule);
2277 			if (tc_skip_sw(f->flags)) {
2278 				NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
2279 				__fl_put(f);
2280 				return err;
2281 			}
2282 			goto next_flow;
2283 		}
2284 
2285 		cls_flower.classid = f->res.classid;
2286 
2287 		err = tc_setup_cb_reoffload(block, tp, add, cb,
2288 					    TC_SETUP_CLSFLOWER, &cls_flower,
2289 					    cb_priv, &f->flags,
2290 					    &f->in_hw_count);
2291 		tc_cleanup_offload_action(&cls_flower.rule->action);
2292 		kfree(cls_flower.rule);
2293 
2294 		if (err) {
2295 			__fl_put(f);
2296 			return err;
2297 		}
2298 next_flow:
2299 		__fl_put(f);
2300 	}
2301 
2302 	return 0;
2303 }
2304 
2305 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
2306 {
2307 	struct flow_cls_offload *cls_flower = type_data;
2308 	struct cls_fl_filter *f =
2309 		(struct cls_fl_filter *) cls_flower->cookie;
2310 	struct cls_fl_head *head = fl_head_dereference(tp);
2311 
2312 	spin_lock(&tp->lock);
2313 	list_add(&f->hw_list, &head->hw_filters);
2314 	spin_unlock(&tp->lock);
2315 }
2316 
2317 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
2318 {
2319 	struct flow_cls_offload *cls_flower = type_data;
2320 	struct cls_fl_filter *f =
2321 		(struct cls_fl_filter *) cls_flower->cookie;
2322 
2323 	spin_lock(&tp->lock);
2324 	if (!list_empty(&f->hw_list))
2325 		list_del_init(&f->hw_list);
2326 	spin_unlock(&tp->lock);
2327 }
2328 
2329 static int fl_hw_create_tmplt(struct tcf_chain *chain,
2330 			      struct fl_flow_tmplt *tmplt)
2331 {
2332 	struct flow_cls_offload cls_flower = {};
2333 	struct tcf_block *block = chain->block;
2334 
2335 	cls_flower.rule = flow_rule_alloc(0);
2336 	if (!cls_flower.rule)
2337 		return -ENOMEM;
2338 
2339 	cls_flower.common.chain_index = chain->index;
2340 	cls_flower.command = FLOW_CLS_TMPLT_CREATE;
2341 	cls_flower.cookie = (unsigned long) tmplt;
2342 	cls_flower.rule->match.dissector = &tmplt->dissector;
2343 	cls_flower.rule->match.mask = &tmplt->mask;
2344 	cls_flower.rule->match.key = &tmplt->dummy_key;
2345 
2346 	/* We don't care if driver (any of them) fails to handle this
2347 	 * call. It serves just as a hint for it.
2348 	 */
2349 	tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2350 	kfree(cls_flower.rule);
2351 
2352 	return 0;
2353 }
2354 
2355 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
2356 				struct fl_flow_tmplt *tmplt)
2357 {
2358 	struct flow_cls_offload cls_flower = {};
2359 	struct tcf_block *block = chain->block;
2360 
2361 	cls_flower.common.chain_index = chain->index;
2362 	cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
2363 	cls_flower.cookie = (unsigned long) tmplt;
2364 
2365 	tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2366 }
2367 
2368 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
2369 			     struct nlattr **tca,
2370 			     struct netlink_ext_ack *extack)
2371 {
2372 	struct fl_flow_tmplt *tmplt;
2373 	struct nlattr **tb;
2374 	int err;
2375 
2376 	if (!tca[TCA_OPTIONS])
2377 		return ERR_PTR(-EINVAL);
2378 
2379 	tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2380 	if (!tb)
2381 		return ERR_PTR(-ENOBUFS);
2382 	err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2383 					  tca[TCA_OPTIONS], fl_policy, NULL);
2384 	if (err)
2385 		goto errout_tb;
2386 
2387 	tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
2388 	if (!tmplt) {
2389 		err = -ENOMEM;
2390 		goto errout_tb;
2391 	}
2392 	tmplt->chain = chain;
2393 	err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
2394 	if (err)
2395 		goto errout_tmplt;
2396 
2397 	fl_init_dissector(&tmplt->dissector, &tmplt->mask);
2398 
2399 	err = fl_hw_create_tmplt(chain, tmplt);
2400 	if (err)
2401 		goto errout_tmplt;
2402 
2403 	kfree(tb);
2404 	return tmplt;
2405 
2406 errout_tmplt:
2407 	kfree(tmplt);
2408 errout_tb:
2409 	kfree(tb);
2410 	return ERR_PTR(err);
2411 }
2412 
2413 static void fl_tmplt_destroy(void *tmplt_priv)
2414 {
2415 	struct fl_flow_tmplt *tmplt = tmplt_priv;
2416 
2417 	fl_hw_destroy_tmplt(tmplt->chain, tmplt);
2418 	kfree(tmplt);
2419 }
2420 
2421 static int fl_dump_key_val(struct sk_buff *skb,
2422 			   void *val, int val_type,
2423 			   void *mask, int mask_type, int len)
2424 {
2425 	int err;
2426 
2427 	if (!memchr_inv(mask, 0, len))
2428 		return 0;
2429 	err = nla_put(skb, val_type, len, val);
2430 	if (err)
2431 		return err;
2432 	if (mask_type != TCA_FLOWER_UNSPEC) {
2433 		err = nla_put(skb, mask_type, len, mask);
2434 		if (err)
2435 			return err;
2436 	}
2437 	return 0;
2438 }
2439 
2440 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2441 				  struct fl_flow_key *mask)
2442 {
2443 	if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2444 			    TCA_FLOWER_KEY_PORT_DST_MIN,
2445 			    &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2446 			    sizeof(key->tp_range.tp_min.dst)) ||
2447 	    fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2448 			    TCA_FLOWER_KEY_PORT_DST_MAX,
2449 			    &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2450 			    sizeof(key->tp_range.tp_max.dst)) ||
2451 	    fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2452 			    TCA_FLOWER_KEY_PORT_SRC_MIN,
2453 			    &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2454 			    sizeof(key->tp_range.tp_min.src)) ||
2455 	    fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2456 			    TCA_FLOWER_KEY_PORT_SRC_MAX,
2457 			    &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2458 			    sizeof(key->tp_range.tp_max.src)))
2459 		return -1;
2460 
2461 	return 0;
2462 }
2463 
2464 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb,
2465 				    struct flow_dissector_key_mpls *mpls_key,
2466 				    struct flow_dissector_key_mpls *mpls_mask,
2467 				    u8 lse_index)
2468 {
2469 	struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index];
2470 	struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index];
2471 	int err;
2472 
2473 	err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH,
2474 			 lse_index + 1);
2475 	if (err)
2476 		return err;
2477 
2478 	if (lse_mask->mpls_ttl) {
2479 		err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL,
2480 				 lse_key->mpls_ttl);
2481 		if (err)
2482 			return err;
2483 	}
2484 	if (lse_mask->mpls_bos) {
2485 		err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS,
2486 				 lse_key->mpls_bos);
2487 		if (err)
2488 			return err;
2489 	}
2490 	if (lse_mask->mpls_tc) {
2491 		err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC,
2492 				 lse_key->mpls_tc);
2493 		if (err)
2494 			return err;
2495 	}
2496 	if (lse_mask->mpls_label) {
2497 		err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
2498 				  lse_key->mpls_label);
2499 		if (err)
2500 			return err;
2501 	}
2502 
2503 	return 0;
2504 }
2505 
2506 static int fl_dump_key_mpls_opts(struct sk_buff *skb,
2507 				 struct flow_dissector_key_mpls *mpls_key,
2508 				 struct flow_dissector_key_mpls *mpls_mask)
2509 {
2510 	struct nlattr *opts;
2511 	struct nlattr *lse;
2512 	u8 lse_index;
2513 	int err;
2514 
2515 	opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS);
2516 	if (!opts)
2517 		return -EMSGSIZE;
2518 
2519 	for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) {
2520 		if (!(mpls_mask->used_lses & 1 << lse_index))
2521 			continue;
2522 
2523 		lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE);
2524 		if (!lse) {
2525 			err = -EMSGSIZE;
2526 			goto err_opts;
2527 		}
2528 
2529 		err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask,
2530 					       lse_index);
2531 		if (err)
2532 			goto err_opts_lse;
2533 		nla_nest_end(skb, lse);
2534 	}
2535 	nla_nest_end(skb, opts);
2536 
2537 	return 0;
2538 
2539 err_opts_lse:
2540 	nla_nest_cancel(skb, lse);
2541 err_opts:
2542 	nla_nest_cancel(skb, opts);
2543 
2544 	return err;
2545 }
2546 
2547 static int fl_dump_key_mpls(struct sk_buff *skb,
2548 			    struct flow_dissector_key_mpls *mpls_key,
2549 			    struct flow_dissector_key_mpls *mpls_mask)
2550 {
2551 	struct flow_dissector_mpls_lse *lse_mask;
2552 	struct flow_dissector_mpls_lse *lse_key;
2553 	int err;
2554 
2555 	if (!mpls_mask->used_lses)
2556 		return 0;
2557 
2558 	lse_mask = &mpls_mask->ls[0];
2559 	lse_key = &mpls_key->ls[0];
2560 
2561 	/* For backward compatibility, don't use the MPLS nested attributes if
2562 	 * the rule can be expressed using the old attributes.
2563 	 */
2564 	if (mpls_mask->used_lses & ~1 ||
2565 	    (!lse_mask->mpls_ttl && !lse_mask->mpls_bos &&
2566 	     !lse_mask->mpls_tc && !lse_mask->mpls_label))
2567 		return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask);
2568 
2569 	if (lse_mask->mpls_ttl) {
2570 		err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2571 				 lse_key->mpls_ttl);
2572 		if (err)
2573 			return err;
2574 	}
2575 	if (lse_mask->mpls_tc) {
2576 		err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2577 				 lse_key->mpls_tc);
2578 		if (err)
2579 			return err;
2580 	}
2581 	if (lse_mask->mpls_label) {
2582 		err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2583 				  lse_key->mpls_label);
2584 		if (err)
2585 			return err;
2586 	}
2587 	if (lse_mask->mpls_bos) {
2588 		err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2589 				 lse_key->mpls_bos);
2590 		if (err)
2591 			return err;
2592 	}
2593 	return 0;
2594 }
2595 
2596 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2597 			  struct flow_dissector_key_ip *key,
2598 			  struct flow_dissector_key_ip *mask)
2599 {
2600 	int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2601 	int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2602 	int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2603 	int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2604 
2605 	if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2606 	    fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2607 		return -1;
2608 
2609 	return 0;
2610 }
2611 
2612 static int fl_dump_key_vlan(struct sk_buff *skb,
2613 			    int vlan_id_key, int vlan_prio_key,
2614 			    struct flow_dissector_key_vlan *vlan_key,
2615 			    struct flow_dissector_key_vlan *vlan_mask)
2616 {
2617 	int err;
2618 
2619 	if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2620 		return 0;
2621 	if (vlan_mask->vlan_id) {
2622 		err = nla_put_u16(skb, vlan_id_key,
2623 				  vlan_key->vlan_id);
2624 		if (err)
2625 			return err;
2626 	}
2627 	if (vlan_mask->vlan_priority) {
2628 		err = nla_put_u8(skb, vlan_prio_key,
2629 				 vlan_key->vlan_priority);
2630 		if (err)
2631 			return err;
2632 	}
2633 	return 0;
2634 }
2635 
2636 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2637 			    u32 *flower_key, u32 *flower_mask,
2638 			    u32 flower_flag_bit, u32 dissector_flag_bit)
2639 {
2640 	if (dissector_mask & dissector_flag_bit) {
2641 		*flower_mask |= flower_flag_bit;
2642 		if (dissector_key & dissector_flag_bit)
2643 			*flower_key |= flower_flag_bit;
2644 	}
2645 }
2646 
2647 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2648 {
2649 	u32 key, mask;
2650 	__be32 _key, _mask;
2651 	int err;
2652 
2653 	if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2654 		return 0;
2655 
2656 	key = 0;
2657 	mask = 0;
2658 
2659 	fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2660 			TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2661 	fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2662 			TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2663 			FLOW_DIS_FIRST_FRAG);
2664 
2665 	_key = cpu_to_be32(key);
2666 	_mask = cpu_to_be32(mask);
2667 
2668 	err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2669 	if (err)
2670 		return err;
2671 
2672 	return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2673 }
2674 
2675 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2676 				  struct flow_dissector_key_enc_opts *enc_opts)
2677 {
2678 	struct geneve_opt *opt;
2679 	struct nlattr *nest;
2680 	int opt_off = 0;
2681 
2682 	nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2683 	if (!nest)
2684 		goto nla_put_failure;
2685 
2686 	while (enc_opts->len > opt_off) {
2687 		opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2688 
2689 		if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2690 				 opt->opt_class))
2691 			goto nla_put_failure;
2692 		if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2693 			       opt->type))
2694 			goto nla_put_failure;
2695 		if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2696 			    opt->length * 4, opt->opt_data))
2697 			goto nla_put_failure;
2698 
2699 		opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2700 	}
2701 	nla_nest_end(skb, nest);
2702 	return 0;
2703 
2704 nla_put_failure:
2705 	nla_nest_cancel(skb, nest);
2706 	return -EMSGSIZE;
2707 }
2708 
2709 static int fl_dump_key_vxlan_opt(struct sk_buff *skb,
2710 				 struct flow_dissector_key_enc_opts *enc_opts)
2711 {
2712 	struct vxlan_metadata *md;
2713 	struct nlattr *nest;
2714 
2715 	nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN);
2716 	if (!nest)
2717 		goto nla_put_failure;
2718 
2719 	md = (struct vxlan_metadata *)&enc_opts->data[0];
2720 	if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp))
2721 		goto nla_put_failure;
2722 
2723 	nla_nest_end(skb, nest);
2724 	return 0;
2725 
2726 nla_put_failure:
2727 	nla_nest_cancel(skb, nest);
2728 	return -EMSGSIZE;
2729 }
2730 
2731 static int fl_dump_key_erspan_opt(struct sk_buff *skb,
2732 				  struct flow_dissector_key_enc_opts *enc_opts)
2733 {
2734 	struct erspan_metadata *md;
2735 	struct nlattr *nest;
2736 
2737 	nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN);
2738 	if (!nest)
2739 		goto nla_put_failure;
2740 
2741 	md = (struct erspan_metadata *)&enc_opts->data[0];
2742 	if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version))
2743 		goto nla_put_failure;
2744 
2745 	if (md->version == 1 &&
2746 	    nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
2747 		goto nla_put_failure;
2748 
2749 	if (md->version == 2 &&
2750 	    (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR,
2751 			md->u.md2.dir) ||
2752 	     nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID,
2753 			get_hwid(&md->u.md2))))
2754 		goto nla_put_failure;
2755 
2756 	nla_nest_end(skb, nest);
2757 	return 0;
2758 
2759 nla_put_failure:
2760 	nla_nest_cancel(skb, nest);
2761 	return -EMSGSIZE;
2762 }
2763 
2764 static int fl_dump_key_ct(struct sk_buff *skb,
2765 			  struct flow_dissector_key_ct *key,
2766 			  struct flow_dissector_key_ct *mask)
2767 {
2768 	if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
2769 	    fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
2770 			    &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
2771 			    sizeof(key->ct_state)))
2772 		goto nla_put_failure;
2773 
2774 	if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
2775 	    fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
2776 			    &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
2777 			    sizeof(key->ct_zone)))
2778 		goto nla_put_failure;
2779 
2780 	if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
2781 	    fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
2782 			    &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
2783 			    sizeof(key->ct_mark)))
2784 		goto nla_put_failure;
2785 
2786 	if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
2787 	    fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
2788 			    &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
2789 			    sizeof(key->ct_labels)))
2790 		goto nla_put_failure;
2791 
2792 	return 0;
2793 
2794 nla_put_failure:
2795 	return -EMSGSIZE;
2796 }
2797 
2798 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
2799 			       struct flow_dissector_key_enc_opts *enc_opts)
2800 {
2801 	struct nlattr *nest;
2802 	int err;
2803 
2804 	if (!enc_opts->len)
2805 		return 0;
2806 
2807 	nest = nla_nest_start_noflag(skb, enc_opt_type);
2808 	if (!nest)
2809 		goto nla_put_failure;
2810 
2811 	switch (enc_opts->dst_opt_type) {
2812 	case TUNNEL_GENEVE_OPT:
2813 		err = fl_dump_key_geneve_opt(skb, enc_opts);
2814 		if (err)
2815 			goto nla_put_failure;
2816 		break;
2817 	case TUNNEL_VXLAN_OPT:
2818 		err = fl_dump_key_vxlan_opt(skb, enc_opts);
2819 		if (err)
2820 			goto nla_put_failure;
2821 		break;
2822 	case TUNNEL_ERSPAN_OPT:
2823 		err = fl_dump_key_erspan_opt(skb, enc_opts);
2824 		if (err)
2825 			goto nla_put_failure;
2826 		break;
2827 	default:
2828 		goto nla_put_failure;
2829 	}
2830 	nla_nest_end(skb, nest);
2831 	return 0;
2832 
2833 nla_put_failure:
2834 	nla_nest_cancel(skb, nest);
2835 	return -EMSGSIZE;
2836 }
2837 
2838 static int fl_dump_key_enc_opt(struct sk_buff *skb,
2839 			       struct flow_dissector_key_enc_opts *key_opts,
2840 			       struct flow_dissector_key_enc_opts *msk_opts)
2841 {
2842 	int err;
2843 
2844 	err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
2845 	if (err)
2846 		return err;
2847 
2848 	return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
2849 }
2850 
2851 static int fl_dump_key(struct sk_buff *skb, struct net *net,
2852 		       struct fl_flow_key *key, struct fl_flow_key *mask)
2853 {
2854 	if (mask->meta.ingress_ifindex) {
2855 		struct net_device *dev;
2856 
2857 		dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
2858 		if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
2859 			goto nla_put_failure;
2860 	}
2861 
2862 	if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
2863 			    mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
2864 			    sizeof(key->eth.dst)) ||
2865 	    fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
2866 			    mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
2867 			    sizeof(key->eth.src)) ||
2868 	    fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
2869 			    &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
2870 			    sizeof(key->basic.n_proto)))
2871 		goto nla_put_failure;
2872 
2873 	if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
2874 		goto nla_put_failure;
2875 
2876 	if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
2877 			     TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
2878 		goto nla_put_failure;
2879 
2880 	if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
2881 			     TCA_FLOWER_KEY_CVLAN_PRIO,
2882 			     &key->cvlan, &mask->cvlan) ||
2883 	    (mask->cvlan.vlan_tpid &&
2884 	     nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2885 			  key->cvlan.vlan_tpid)))
2886 		goto nla_put_failure;
2887 
2888 	if (mask->basic.n_proto) {
2889 		if (mask->cvlan.vlan_tpid) {
2890 			if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
2891 					 key->basic.n_proto))
2892 				goto nla_put_failure;
2893 		} else if (mask->vlan.vlan_tpid) {
2894 			if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
2895 					 key->basic.n_proto))
2896 				goto nla_put_failure;
2897 		}
2898 	}
2899 
2900 	if ((key->basic.n_proto == htons(ETH_P_IP) ||
2901 	     key->basic.n_proto == htons(ETH_P_IPV6)) &&
2902 	    (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
2903 			    &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
2904 			    sizeof(key->basic.ip_proto)) ||
2905 	    fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
2906 		goto nla_put_failure;
2907 
2908 	if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
2909 	    (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
2910 			     &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
2911 			     sizeof(key->ipv4.src)) ||
2912 	     fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
2913 			     &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
2914 			     sizeof(key->ipv4.dst))))
2915 		goto nla_put_failure;
2916 	else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
2917 		 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
2918 				  &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
2919 				  sizeof(key->ipv6.src)) ||
2920 		  fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
2921 				  &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
2922 				  sizeof(key->ipv6.dst))))
2923 		goto nla_put_failure;
2924 
2925 	if (key->basic.ip_proto == IPPROTO_TCP &&
2926 	    (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
2927 			     &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
2928 			     sizeof(key->tp.src)) ||
2929 	     fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
2930 			     &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
2931 			     sizeof(key->tp.dst)) ||
2932 	     fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
2933 			     &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
2934 			     sizeof(key->tcp.flags))))
2935 		goto nla_put_failure;
2936 	else if (key->basic.ip_proto == IPPROTO_UDP &&
2937 		 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
2938 				  &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
2939 				  sizeof(key->tp.src)) ||
2940 		  fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
2941 				  &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
2942 				  sizeof(key->tp.dst))))
2943 		goto nla_put_failure;
2944 	else if (key->basic.ip_proto == IPPROTO_SCTP &&
2945 		 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
2946 				  &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
2947 				  sizeof(key->tp.src)) ||
2948 		  fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
2949 				  &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
2950 				  sizeof(key->tp.dst))))
2951 		goto nla_put_failure;
2952 	else if (key->basic.n_proto == htons(ETH_P_IP) &&
2953 		 key->basic.ip_proto == IPPROTO_ICMP &&
2954 		 (fl_dump_key_val(skb, &key->icmp.type,
2955 				  TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
2956 				  TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
2957 				  sizeof(key->icmp.type)) ||
2958 		  fl_dump_key_val(skb, &key->icmp.code,
2959 				  TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
2960 				  TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
2961 				  sizeof(key->icmp.code))))
2962 		goto nla_put_failure;
2963 	else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
2964 		 key->basic.ip_proto == IPPROTO_ICMPV6 &&
2965 		 (fl_dump_key_val(skb, &key->icmp.type,
2966 				  TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
2967 				  TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
2968 				  sizeof(key->icmp.type)) ||
2969 		  fl_dump_key_val(skb, &key->icmp.code,
2970 				  TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
2971 				  TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
2972 				  sizeof(key->icmp.code))))
2973 		goto nla_put_failure;
2974 	else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
2975 		  key->basic.n_proto == htons(ETH_P_RARP)) &&
2976 		 (fl_dump_key_val(skb, &key->arp.sip,
2977 				  TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
2978 				  TCA_FLOWER_KEY_ARP_SIP_MASK,
2979 				  sizeof(key->arp.sip)) ||
2980 		  fl_dump_key_val(skb, &key->arp.tip,
2981 				  TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
2982 				  TCA_FLOWER_KEY_ARP_TIP_MASK,
2983 				  sizeof(key->arp.tip)) ||
2984 		  fl_dump_key_val(skb, &key->arp.op,
2985 				  TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
2986 				  TCA_FLOWER_KEY_ARP_OP_MASK,
2987 				  sizeof(key->arp.op)) ||
2988 		  fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
2989 				  mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
2990 				  sizeof(key->arp.sha)) ||
2991 		  fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
2992 				  mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
2993 				  sizeof(key->arp.tha))))
2994 		goto nla_put_failure;
2995 
2996 	if ((key->basic.ip_proto == IPPROTO_TCP ||
2997 	     key->basic.ip_proto == IPPROTO_UDP ||
2998 	     key->basic.ip_proto == IPPROTO_SCTP) &&
2999 	     fl_dump_key_port_range(skb, key, mask))
3000 		goto nla_put_failure;
3001 
3002 	if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3003 	    (fl_dump_key_val(skb, &key->enc_ipv4.src,
3004 			    TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
3005 			    TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
3006 			    sizeof(key->enc_ipv4.src)) ||
3007 	     fl_dump_key_val(skb, &key->enc_ipv4.dst,
3008 			     TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
3009 			     TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
3010 			     sizeof(key->enc_ipv4.dst))))
3011 		goto nla_put_failure;
3012 	else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3013 		 (fl_dump_key_val(skb, &key->enc_ipv6.src,
3014 			    TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
3015 			    TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
3016 			    sizeof(key->enc_ipv6.src)) ||
3017 		 fl_dump_key_val(skb, &key->enc_ipv6.dst,
3018 				 TCA_FLOWER_KEY_ENC_IPV6_DST,
3019 				 &mask->enc_ipv6.dst,
3020 				 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
3021 			    sizeof(key->enc_ipv6.dst))))
3022 		goto nla_put_failure;
3023 
3024 	if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
3025 			    &mask->enc_key_id, TCA_FLOWER_UNSPEC,
3026 			    sizeof(key->enc_key_id)) ||
3027 	    fl_dump_key_val(skb, &key->enc_tp.src,
3028 			    TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
3029 			    &mask->enc_tp.src,
3030 			    TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
3031 			    sizeof(key->enc_tp.src)) ||
3032 	    fl_dump_key_val(skb, &key->enc_tp.dst,
3033 			    TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
3034 			    &mask->enc_tp.dst,
3035 			    TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
3036 			    sizeof(key->enc_tp.dst)) ||
3037 	    fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
3038 	    fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
3039 		goto nla_put_failure;
3040 
3041 	if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
3042 		goto nla_put_failure;
3043 
3044 	if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
3045 		goto nla_put_failure;
3046 
3047 	if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
3048 			     &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
3049 			     sizeof(key->hash.hash)))
3050 		goto nla_put_failure;
3051 
3052 	return 0;
3053 
3054 nla_put_failure:
3055 	return -EMSGSIZE;
3056 }
3057 
3058 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
3059 		   struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3060 {
3061 	struct cls_fl_filter *f = fh;
3062 	struct nlattr *nest;
3063 	struct fl_flow_key *key, *mask;
3064 	bool skip_hw;
3065 
3066 	if (!f)
3067 		return skb->len;
3068 
3069 	t->tcm_handle = f->handle;
3070 
3071 	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3072 	if (!nest)
3073 		goto nla_put_failure;
3074 
3075 	spin_lock(&tp->lock);
3076 
3077 	if (f->res.classid &&
3078 	    nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
3079 		goto nla_put_failure_locked;
3080 
3081 	key = &f->key;
3082 	mask = &f->mask->key;
3083 	skip_hw = tc_skip_hw(f->flags);
3084 
3085 	if (fl_dump_key(skb, net, key, mask))
3086 		goto nla_put_failure_locked;
3087 
3088 	if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3089 		goto nla_put_failure_locked;
3090 
3091 	spin_unlock(&tp->lock);
3092 
3093 	if (!skip_hw)
3094 		fl_hw_update_stats(tp, f, rtnl_held);
3095 
3096 	if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
3097 		goto nla_put_failure;
3098 
3099 	if (tcf_exts_dump(skb, &f->exts))
3100 		goto nla_put_failure;
3101 
3102 	nla_nest_end(skb, nest);
3103 
3104 	if (tcf_exts_dump_stats(skb, &f->exts) < 0)
3105 		goto nla_put_failure;
3106 
3107 	return skb->len;
3108 
3109 nla_put_failure_locked:
3110 	spin_unlock(&tp->lock);
3111 nla_put_failure:
3112 	nla_nest_cancel(skb, nest);
3113 	return -1;
3114 }
3115 
3116 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh,
3117 			 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3118 {
3119 	struct cls_fl_filter *f = fh;
3120 	struct nlattr *nest;
3121 	bool skip_hw;
3122 
3123 	if (!f)
3124 		return skb->len;
3125 
3126 	t->tcm_handle = f->handle;
3127 
3128 	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3129 	if (!nest)
3130 		goto nla_put_failure;
3131 
3132 	spin_lock(&tp->lock);
3133 
3134 	skip_hw = tc_skip_hw(f->flags);
3135 
3136 	if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3137 		goto nla_put_failure_locked;
3138 
3139 	spin_unlock(&tp->lock);
3140 
3141 	if (!skip_hw)
3142 		fl_hw_update_stats(tp, f, rtnl_held);
3143 
3144 	if (tcf_exts_terse_dump(skb, &f->exts))
3145 		goto nla_put_failure;
3146 
3147 	nla_nest_end(skb, nest);
3148 
3149 	return skb->len;
3150 
3151 nla_put_failure_locked:
3152 	spin_unlock(&tp->lock);
3153 nla_put_failure:
3154 	nla_nest_cancel(skb, nest);
3155 	return -1;
3156 }
3157 
3158 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
3159 {
3160 	struct fl_flow_tmplt *tmplt = tmplt_priv;
3161 	struct fl_flow_key *key, *mask;
3162 	struct nlattr *nest;
3163 
3164 	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3165 	if (!nest)
3166 		goto nla_put_failure;
3167 
3168 	key = &tmplt->dummy_key;
3169 	mask = &tmplt->mask;
3170 
3171 	if (fl_dump_key(skb, net, key, mask))
3172 		goto nla_put_failure;
3173 
3174 	nla_nest_end(skb, nest);
3175 
3176 	return skb->len;
3177 
3178 nla_put_failure:
3179 	nla_nest_cancel(skb, nest);
3180 	return -EMSGSIZE;
3181 }
3182 
3183 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
3184 			  unsigned long base)
3185 {
3186 	struct cls_fl_filter *f = fh;
3187 
3188 	if (f && f->res.classid == classid) {
3189 		if (cl)
3190 			__tcf_bind_filter(q, &f->res, base);
3191 		else
3192 			__tcf_unbind_filter(q, &f->res);
3193 	}
3194 }
3195 
3196 static bool fl_delete_empty(struct tcf_proto *tp)
3197 {
3198 	struct cls_fl_head *head = fl_head_dereference(tp);
3199 
3200 	spin_lock(&tp->lock);
3201 	tp->deleting = idr_is_empty(&head->handle_idr);
3202 	spin_unlock(&tp->lock);
3203 
3204 	return tp->deleting;
3205 }
3206 
3207 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
3208 	.kind		= "flower",
3209 	.classify	= fl_classify,
3210 	.init		= fl_init,
3211 	.destroy	= fl_destroy,
3212 	.get		= fl_get,
3213 	.put		= fl_put,
3214 	.change		= fl_change,
3215 	.delete		= fl_delete,
3216 	.delete_empty	= fl_delete_empty,
3217 	.walk		= fl_walk,
3218 	.reoffload	= fl_reoffload,
3219 	.hw_add		= fl_hw_add,
3220 	.hw_del		= fl_hw_del,
3221 	.dump		= fl_dump,
3222 	.terse_dump	= fl_terse_dump,
3223 	.bind_class	= fl_bind_class,
3224 	.tmplt_create	= fl_tmplt_create,
3225 	.tmplt_destroy	= fl_tmplt_destroy,
3226 	.tmplt_dump	= fl_tmplt_dump,
3227 	.owner		= THIS_MODULE,
3228 	.flags		= TCF_PROTO_OPS_DOIT_UNLOCKED,
3229 };
3230 
3231 static int __init cls_fl_init(void)
3232 {
3233 	return register_tcf_proto_ops(&cls_fl_ops);
3234 }
3235 
3236 static void __exit cls_fl_exit(void)
3237 {
3238 	unregister_tcf_proto_ops(&cls_fl_ops);
3239 }
3240 
3241 module_init(cls_fl_init);
3242 module_exit(cls_fl_exit);
3243 
3244 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3245 MODULE_DESCRIPTION("Flower classifier");
3246 MODULE_LICENSE("GPL v2");
3247