xref: /openbmc/linux/net/netfilter/nft_set_hash.c (revision 92614ad5) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2008-2014 Patrick McHardy <kaber@trash.net>
4  *
5  * Development of this code funded by Astaro AG (http://www.astaro.com/)
6  */
7 
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/list.h>
12 #include <linux/log2.h>
13 #include <linux/jhash.h>
14 #include <linux/netlink.h>
15 #include <linux/workqueue.h>
16 #include <linux/rhashtable.h>
17 #include <linux/netfilter.h>
18 #include <linux/netfilter/nf_tables.h>
19 #include <net/netfilter/nf_tables_core.h>
20 
21 /* We target a hash table size of 4, element hint is 75% of final size */
22 #define NFT_RHASH_ELEMENT_HINT 3
23 
24 struct nft_rhash {
25 	struct rhashtable		ht;
26 	struct delayed_work		gc_work;
27 };
28 
29 struct nft_rhash_elem {
30 	struct rhash_head		node;
31 	struct nft_set_ext		ext;
32 };
33 
34 struct nft_rhash_cmp_arg {
35 	const struct nft_set		*set;
36 	const u32			*key;
37 	u8				genmask;
38 };
39 
40 static inline u32 nft_rhash_key(const void *data, u32 len, u32 seed)
41 {
42 	const struct nft_rhash_cmp_arg *arg = data;
43 
44 	return jhash(arg->key, len, seed);
45 }
46 
47 static inline u32 nft_rhash_obj(const void *data, u32 len, u32 seed)
48 {
49 	const struct nft_rhash_elem *he = data;
50 
51 	return jhash(nft_set_ext_key(&he->ext), len, seed);
52 }
53 
54 static inline int nft_rhash_cmp(struct rhashtable_compare_arg *arg,
55 				const void *ptr)
56 {
57 	const struct nft_rhash_cmp_arg *x = arg->key;
58 	const struct nft_rhash_elem *he = ptr;
59 
60 	if (memcmp(nft_set_ext_key(&he->ext), x->key, x->set->klen))
61 		return 1;
62 	if (nft_set_elem_expired(&he->ext))
63 		return 1;
64 	if (!nft_set_elem_active(&he->ext, x->genmask))
65 		return 1;
66 	return 0;
67 }
68 
69 static const struct rhashtable_params nft_rhash_params = {
70 	.head_offset		= offsetof(struct nft_rhash_elem, node),
71 	.hashfn			= nft_rhash_key,
72 	.obj_hashfn		= nft_rhash_obj,
73 	.obj_cmpfn		= nft_rhash_cmp,
74 	.automatic_shrinking	= true,
75 };
76 
77 static bool nft_rhash_lookup(const struct net *net, const struct nft_set *set,
78 			     const u32 *key, const struct nft_set_ext **ext)
79 {
80 	struct nft_rhash *priv = nft_set_priv(set);
81 	const struct nft_rhash_elem *he;
82 	struct nft_rhash_cmp_arg arg = {
83 		.genmask = nft_genmask_cur(net),
84 		.set	 = set,
85 		.key	 = key,
86 	};
87 
88 	he = rhashtable_lookup(&priv->ht, &arg, nft_rhash_params);
89 	if (he != NULL)
90 		*ext = &he->ext;
91 
92 	return !!he;
93 }
94 
95 static void *nft_rhash_get(const struct net *net, const struct nft_set *set,
96 			   const struct nft_set_elem *elem, unsigned int flags)
97 {
98 	struct nft_rhash *priv = nft_set_priv(set);
99 	struct nft_rhash_elem *he;
100 	struct nft_rhash_cmp_arg arg = {
101 		.genmask = nft_genmask_cur(net),
102 		.set	 = set,
103 		.key	 = elem->key.val.data,
104 	};
105 
106 	he = rhashtable_lookup(&priv->ht, &arg, nft_rhash_params);
107 	if (he != NULL)
108 		return he;
109 
110 	return ERR_PTR(-ENOENT);
111 }
112 
113 static bool nft_rhash_update(struct nft_set *set, const u32 *key,
114 			     void *(*new)(struct nft_set *,
115 					  const struct nft_expr *,
116 					  struct nft_regs *regs),
117 			     const struct nft_expr *expr,
118 			     struct nft_regs *regs,
119 			     const struct nft_set_ext **ext)
120 {
121 	struct nft_rhash *priv = nft_set_priv(set);
122 	struct nft_rhash_elem *he, *prev;
123 	struct nft_rhash_cmp_arg arg = {
124 		.genmask = NFT_GENMASK_ANY,
125 		.set	 = set,
126 		.key	 = key,
127 	};
128 
129 	he = rhashtable_lookup(&priv->ht, &arg, nft_rhash_params);
130 	if (he != NULL)
131 		goto out;
132 
133 	he = new(set, expr, regs);
134 	if (he == NULL)
135 		goto err1;
136 
137 	prev = rhashtable_lookup_get_insert_key(&priv->ht, &arg, &he->node,
138 						nft_rhash_params);
139 	if (IS_ERR(prev))
140 		goto err2;
141 
142 	/* Another cpu may race to insert the element with the same key */
143 	if (prev) {
144 		nft_set_elem_destroy(set, he, true);
145 		he = prev;
146 	}
147 
148 out:
149 	*ext = &he->ext;
150 	return true;
151 
152 err2:
153 	nft_set_elem_destroy(set, he, true);
154 err1:
155 	return false;
156 }
157 
158 static int nft_rhash_insert(const struct net *net, const struct nft_set *set,
159 			    const struct nft_set_elem *elem,
160 			    struct nft_set_ext **ext)
161 {
162 	struct nft_rhash *priv = nft_set_priv(set);
163 	struct nft_rhash_elem *he = elem->priv;
164 	struct nft_rhash_cmp_arg arg = {
165 		.genmask = nft_genmask_next(net),
166 		.set	 = set,
167 		.key	 = elem->key.val.data,
168 	};
169 	struct nft_rhash_elem *prev;
170 
171 	prev = rhashtable_lookup_get_insert_key(&priv->ht, &arg, &he->node,
172 						nft_rhash_params);
173 	if (IS_ERR(prev))
174 		return PTR_ERR(prev);
175 	if (prev) {
176 		*ext = &prev->ext;
177 		return -EEXIST;
178 	}
179 	return 0;
180 }
181 
182 static void nft_rhash_activate(const struct net *net, const struct nft_set *set,
183 			       const struct nft_set_elem *elem)
184 {
185 	struct nft_rhash_elem *he = elem->priv;
186 
187 	nft_set_elem_change_active(net, set, &he->ext);
188 	nft_set_elem_clear_busy(&he->ext);
189 }
190 
191 static bool nft_rhash_flush(const struct net *net,
192 			    const struct nft_set *set, void *priv)
193 {
194 	struct nft_rhash_elem *he = priv;
195 
196 	if (!nft_set_elem_mark_busy(&he->ext) ||
197 	    !nft_is_active(net, &he->ext)) {
198 		nft_set_elem_change_active(net, set, &he->ext);
199 		return true;
200 	}
201 	return false;
202 }
203 
204 static void *nft_rhash_deactivate(const struct net *net,
205 				  const struct nft_set *set,
206 				  const struct nft_set_elem *elem)
207 {
208 	struct nft_rhash *priv = nft_set_priv(set);
209 	struct nft_rhash_elem *he;
210 	struct nft_rhash_cmp_arg arg = {
211 		.genmask = nft_genmask_next(net),
212 		.set	 = set,
213 		.key	 = elem->key.val.data,
214 	};
215 
216 	rcu_read_lock();
217 	he = rhashtable_lookup(&priv->ht, &arg, nft_rhash_params);
218 	if (he != NULL &&
219 	    !nft_rhash_flush(net, set, he))
220 		he = NULL;
221 
222 	rcu_read_unlock();
223 
224 	return he;
225 }
226 
227 static void nft_rhash_remove(const struct net *net,
228 			     const struct nft_set *set,
229 			     const struct nft_set_elem *elem)
230 {
231 	struct nft_rhash *priv = nft_set_priv(set);
232 	struct nft_rhash_elem *he = elem->priv;
233 
234 	rhashtable_remove_fast(&priv->ht, &he->node, nft_rhash_params);
235 }
236 
237 static bool nft_rhash_delete(const struct nft_set *set,
238 			     const u32 *key)
239 {
240 	struct nft_rhash *priv = nft_set_priv(set);
241 	struct nft_rhash_cmp_arg arg = {
242 		.genmask = NFT_GENMASK_ANY,
243 		.set = set,
244 		.key = key,
245 	};
246 	struct nft_rhash_elem *he;
247 
248 	he = rhashtable_lookup(&priv->ht, &arg, nft_rhash_params);
249 	if (he == NULL)
250 		return false;
251 
252 	return rhashtable_remove_fast(&priv->ht, &he->node, nft_rhash_params) == 0;
253 }
254 
255 static void nft_rhash_walk(const struct nft_ctx *ctx, struct nft_set *set,
256 			   struct nft_set_iter *iter)
257 {
258 	struct nft_rhash *priv = nft_set_priv(set);
259 	struct nft_rhash_elem *he;
260 	struct rhashtable_iter hti;
261 	struct nft_set_elem elem;
262 
263 	rhashtable_walk_enter(&priv->ht, &hti);
264 	rhashtable_walk_start(&hti);
265 
266 	while ((he = rhashtable_walk_next(&hti))) {
267 		if (IS_ERR(he)) {
268 			if (PTR_ERR(he) != -EAGAIN) {
269 				iter->err = PTR_ERR(he);
270 				break;
271 			}
272 
273 			continue;
274 		}
275 
276 		if (iter->count < iter->skip)
277 			goto cont;
278 		if (nft_set_elem_expired(&he->ext))
279 			goto cont;
280 		if (!nft_set_elem_active(&he->ext, iter->genmask))
281 			goto cont;
282 
283 		elem.priv = he;
284 
285 		iter->err = iter->fn(ctx, set, iter, &elem);
286 		if (iter->err < 0)
287 			break;
288 
289 cont:
290 		iter->count++;
291 	}
292 	rhashtable_walk_stop(&hti);
293 	rhashtable_walk_exit(&hti);
294 }
295 
296 static bool nft_rhash_expr_needs_gc_run(const struct nft_set *set,
297 					struct nft_set_ext *ext)
298 {
299 	struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
300 	struct nft_expr *expr;
301 	u32 size;
302 
303 	nft_setelem_expr_foreach(expr, elem_expr, size) {
304 		if (expr->ops->gc &&
305 		    expr->ops->gc(read_pnet(&set->net), expr))
306 			return true;
307 	}
308 
309 	return false;
310 }
311 
312 static void nft_rhash_gc(struct work_struct *work)
313 {
314 	struct nft_set *set;
315 	struct nft_rhash_elem *he;
316 	struct nft_rhash *priv;
317 	struct nft_set_gc_batch *gcb = NULL;
318 	struct rhashtable_iter hti;
319 
320 	priv = container_of(work, struct nft_rhash, gc_work.work);
321 	set  = nft_set_container_of(priv);
322 
323 	rhashtable_walk_enter(&priv->ht, &hti);
324 	rhashtable_walk_start(&hti);
325 
326 	while ((he = rhashtable_walk_next(&hti))) {
327 		if (IS_ERR(he)) {
328 			if (PTR_ERR(he) != -EAGAIN)
329 				break;
330 			continue;
331 		}
332 
333 		if (nft_set_ext_exists(&he->ext, NFT_SET_EXT_EXPRESSIONS) &&
334 		    nft_rhash_expr_needs_gc_run(set, &he->ext))
335 			goto needs_gc_run;
336 
337 		if (!nft_set_elem_expired(&he->ext))
338 			continue;
339 needs_gc_run:
340 		if (nft_set_elem_mark_busy(&he->ext))
341 			continue;
342 
343 		gcb = nft_set_gc_batch_check(set, gcb, GFP_ATOMIC);
344 		if (gcb == NULL)
345 			break;
346 		rhashtable_remove_fast(&priv->ht, &he->node, nft_rhash_params);
347 		atomic_dec(&set->nelems);
348 		nft_set_gc_batch_add(gcb, he);
349 	}
350 	rhashtable_walk_stop(&hti);
351 	rhashtable_walk_exit(&hti);
352 
353 	nft_set_gc_batch_complete(gcb);
354 	queue_delayed_work(system_power_efficient_wq, &priv->gc_work,
355 			   nft_set_gc_interval(set));
356 }
357 
358 static u64 nft_rhash_privsize(const struct nlattr * const nla[],
359 			      const struct nft_set_desc *desc)
360 {
361 	return sizeof(struct nft_rhash);
362 }
363 
364 static void nft_rhash_gc_init(const struct nft_set *set)
365 {
366 	struct nft_rhash *priv = nft_set_priv(set);
367 
368 	queue_delayed_work(system_power_efficient_wq, &priv->gc_work,
369 			   nft_set_gc_interval(set));
370 }
371 
372 static int nft_rhash_init(const struct nft_set *set,
373 			  const struct nft_set_desc *desc,
374 			  const struct nlattr * const tb[])
375 {
376 	struct nft_rhash *priv = nft_set_priv(set);
377 	struct rhashtable_params params = nft_rhash_params;
378 	int err;
379 
380 	params.nelem_hint = desc->size ?: NFT_RHASH_ELEMENT_HINT;
381 	params.key_len	  = set->klen;
382 
383 	err = rhashtable_init(&priv->ht, &params);
384 	if (err < 0)
385 		return err;
386 
387 	INIT_DEFERRABLE_WORK(&priv->gc_work, nft_rhash_gc);
388 	if (set->flags & NFT_SET_TIMEOUT)
389 		nft_rhash_gc_init(set);
390 
391 	return 0;
392 }
393 
394 static void nft_rhash_elem_destroy(void *ptr, void *arg)
395 {
396 	nft_set_elem_destroy(arg, ptr, true);
397 }
398 
399 static void nft_rhash_destroy(const struct nft_set *set)
400 {
401 	struct nft_rhash *priv = nft_set_priv(set);
402 
403 	cancel_delayed_work_sync(&priv->gc_work);
404 	rcu_barrier();
405 	rhashtable_free_and_destroy(&priv->ht, nft_rhash_elem_destroy,
406 				    (void *)set);
407 }
408 
409 static u32 nft_hash_buckets(u32 size)
410 {
411 	return roundup_pow_of_two(size * 4 / 3);
412 }
413 
414 static bool nft_rhash_estimate(const struct nft_set_desc *desc, u32 features,
415 			       struct nft_set_estimate *est)
416 {
417 	est->size   = ~0;
418 	est->lookup = NFT_SET_CLASS_O_1;
419 	est->space  = NFT_SET_CLASS_O_N;
420 
421 	return true;
422 }
423 
424 struct nft_hash {
425 	u32				seed;
426 	u32				buckets;
427 	struct hlist_head		table[];
428 };
429 
430 struct nft_hash_elem {
431 	struct hlist_node		node;
432 	struct nft_set_ext		ext;
433 };
434 
435 static bool nft_hash_lookup(const struct net *net, const struct nft_set *set,
436 			    const u32 *key, const struct nft_set_ext **ext)
437 {
438 	struct nft_hash *priv = nft_set_priv(set);
439 	u8 genmask = nft_genmask_cur(net);
440 	const struct nft_hash_elem *he;
441 	u32 hash;
442 
443 	hash = jhash(key, set->klen, priv->seed);
444 	hash = reciprocal_scale(hash, priv->buckets);
445 	hlist_for_each_entry_rcu(he, &priv->table[hash], node) {
446 		if (!memcmp(nft_set_ext_key(&he->ext), key, set->klen) &&
447 		    nft_set_elem_active(&he->ext, genmask)) {
448 			*ext = &he->ext;
449 			return true;
450 		}
451 	}
452 	return false;
453 }
454 
455 static void *nft_hash_get(const struct net *net, const struct nft_set *set,
456 			  const struct nft_set_elem *elem, unsigned int flags)
457 {
458 	struct nft_hash *priv = nft_set_priv(set);
459 	u8 genmask = nft_genmask_cur(net);
460 	struct nft_hash_elem *he;
461 	u32 hash;
462 
463 	hash = jhash(elem->key.val.data, set->klen, priv->seed);
464 	hash = reciprocal_scale(hash, priv->buckets);
465 	hlist_for_each_entry_rcu(he, &priv->table[hash], node) {
466 		if (!memcmp(nft_set_ext_key(&he->ext), elem->key.val.data, set->klen) &&
467 		    nft_set_elem_active(&he->ext, genmask))
468 			return he;
469 	}
470 	return ERR_PTR(-ENOENT);
471 }
472 
473 static bool nft_hash_lookup_fast(const struct net *net,
474 				 const struct nft_set *set,
475 				 const u32 *key, const struct nft_set_ext **ext)
476 {
477 	struct nft_hash *priv = nft_set_priv(set);
478 	u8 genmask = nft_genmask_cur(net);
479 	const struct nft_hash_elem *he;
480 	u32 hash, k1, k2;
481 
482 	k1 = *key;
483 	hash = jhash_1word(k1, priv->seed);
484 	hash = reciprocal_scale(hash, priv->buckets);
485 	hlist_for_each_entry_rcu(he, &priv->table[hash], node) {
486 		k2 = *(u32 *)nft_set_ext_key(&he->ext)->data;
487 		if (k1 == k2 &&
488 		    nft_set_elem_active(&he->ext, genmask)) {
489 			*ext = &he->ext;
490 			return true;
491 		}
492 	}
493 	return false;
494 }
495 
496 static u32 nft_jhash(const struct nft_set *set, const struct nft_hash *priv,
497 		     const struct nft_set_ext *ext)
498 {
499 	const struct nft_data *key = nft_set_ext_key(ext);
500 	u32 hash, k1;
501 
502 	if (set->klen == 4) {
503 		k1 = *(u32 *)key;
504 		hash = jhash_1word(k1, priv->seed);
505 	} else {
506 		hash = jhash(key, set->klen, priv->seed);
507 	}
508 	hash = reciprocal_scale(hash, priv->buckets);
509 
510 	return hash;
511 }
512 
513 static int nft_hash_insert(const struct net *net, const struct nft_set *set,
514 			   const struct nft_set_elem *elem,
515 			   struct nft_set_ext **ext)
516 {
517 	struct nft_hash_elem *this = elem->priv, *he;
518 	struct nft_hash *priv = nft_set_priv(set);
519 	u8 genmask = nft_genmask_next(net);
520 	u32 hash;
521 
522 	hash = nft_jhash(set, priv, &this->ext);
523 	hlist_for_each_entry(he, &priv->table[hash], node) {
524 		if (!memcmp(nft_set_ext_key(&this->ext),
525 			    nft_set_ext_key(&he->ext), set->klen) &&
526 		    nft_set_elem_active(&he->ext, genmask)) {
527 			*ext = &he->ext;
528 			return -EEXIST;
529 		}
530 	}
531 	hlist_add_head_rcu(&this->node, &priv->table[hash]);
532 	return 0;
533 }
534 
535 static void nft_hash_activate(const struct net *net, const struct nft_set *set,
536 			      const struct nft_set_elem *elem)
537 {
538 	struct nft_hash_elem *he = elem->priv;
539 
540 	nft_set_elem_change_active(net, set, &he->ext);
541 }
542 
543 static bool nft_hash_flush(const struct net *net,
544 			   const struct nft_set *set, void *priv)
545 {
546 	struct nft_hash_elem *he = priv;
547 
548 	nft_set_elem_change_active(net, set, &he->ext);
549 	return true;
550 }
551 
552 static void *nft_hash_deactivate(const struct net *net,
553 				 const struct nft_set *set,
554 				 const struct nft_set_elem *elem)
555 {
556 	struct nft_hash *priv = nft_set_priv(set);
557 	struct nft_hash_elem *this = elem->priv, *he;
558 	u8 genmask = nft_genmask_next(net);
559 	u32 hash;
560 
561 	hash = nft_jhash(set, priv, &this->ext);
562 	hlist_for_each_entry(he, &priv->table[hash], node) {
563 		if (!memcmp(nft_set_ext_key(&he->ext), &elem->key.val,
564 			    set->klen) &&
565 		    nft_set_elem_active(&he->ext, genmask)) {
566 			nft_set_elem_change_active(net, set, &he->ext);
567 			return he;
568 		}
569 	}
570 	return NULL;
571 }
572 
573 static void nft_hash_remove(const struct net *net,
574 			    const struct nft_set *set,
575 			    const struct nft_set_elem *elem)
576 {
577 	struct nft_hash_elem *he = elem->priv;
578 
579 	hlist_del_rcu(&he->node);
580 }
581 
582 static void nft_hash_walk(const struct nft_ctx *ctx, struct nft_set *set,
583 			  struct nft_set_iter *iter)
584 {
585 	struct nft_hash *priv = nft_set_priv(set);
586 	struct nft_hash_elem *he;
587 	struct nft_set_elem elem;
588 	int i;
589 
590 	for (i = 0; i < priv->buckets; i++) {
591 		hlist_for_each_entry_rcu(he, &priv->table[i], node) {
592 			if (iter->count < iter->skip)
593 				goto cont;
594 			if (!nft_set_elem_active(&he->ext, iter->genmask))
595 				goto cont;
596 
597 			elem.priv = he;
598 
599 			iter->err = iter->fn(ctx, set, iter, &elem);
600 			if (iter->err < 0)
601 				return;
602 cont:
603 			iter->count++;
604 		}
605 	}
606 }
607 
608 static u64 nft_hash_privsize(const struct nlattr * const nla[],
609 			     const struct nft_set_desc *desc)
610 {
611 	return sizeof(struct nft_hash) +
612 	       nft_hash_buckets(desc->size) * sizeof(struct hlist_head);
613 }
614 
615 static int nft_hash_init(const struct nft_set *set,
616 			 const struct nft_set_desc *desc,
617 			 const struct nlattr * const tb[])
618 {
619 	struct nft_hash *priv = nft_set_priv(set);
620 
621 	priv->buckets = nft_hash_buckets(desc->size);
622 	get_random_bytes(&priv->seed, sizeof(priv->seed));
623 
624 	return 0;
625 }
626 
627 static void nft_hash_destroy(const struct nft_set *set)
628 {
629 	struct nft_hash *priv = nft_set_priv(set);
630 	struct nft_hash_elem *he;
631 	struct hlist_node *next;
632 	int i;
633 
634 	for (i = 0; i < priv->buckets; i++) {
635 		hlist_for_each_entry_safe(he, next, &priv->table[i], node) {
636 			hlist_del_rcu(&he->node);
637 			nft_set_elem_destroy(set, he, true);
638 		}
639 	}
640 }
641 
642 static bool nft_hash_estimate(const struct nft_set_desc *desc, u32 features,
643 			      struct nft_set_estimate *est)
644 {
645 	if (!desc->size)
646 		return false;
647 
648 	if (desc->klen == 4)
649 		return false;
650 
651 	est->size   = sizeof(struct nft_hash) +
652 		      nft_hash_buckets(desc->size) * sizeof(struct hlist_head) +
653 		      desc->size * sizeof(struct nft_hash_elem);
654 	est->lookup = NFT_SET_CLASS_O_1;
655 	est->space  = NFT_SET_CLASS_O_N;
656 
657 	return true;
658 }
659 
660 static bool nft_hash_fast_estimate(const struct nft_set_desc *desc, u32 features,
661 				   struct nft_set_estimate *est)
662 {
663 	if (!desc->size)
664 		return false;
665 
666 	if (desc->klen != 4)
667 		return false;
668 
669 	est->size   = sizeof(struct nft_hash) +
670 		      nft_hash_buckets(desc->size) * sizeof(struct hlist_head) +
671 		      desc->size * sizeof(struct nft_hash_elem);
672 	est->lookup = NFT_SET_CLASS_O_1;
673 	est->space  = NFT_SET_CLASS_O_N;
674 
675 	return true;
676 }
677 
678 const struct nft_set_type nft_set_rhash_type = {
679 	.features	= NFT_SET_MAP | NFT_SET_OBJECT |
680 			  NFT_SET_TIMEOUT | NFT_SET_EVAL,
681 	.ops		= {
682 		.privsize       = nft_rhash_privsize,
683 		.elemsize	= offsetof(struct nft_rhash_elem, ext),
684 		.estimate	= nft_rhash_estimate,
685 		.init		= nft_rhash_init,
686 		.gc_init	= nft_rhash_gc_init,
687 		.destroy	= nft_rhash_destroy,
688 		.insert		= nft_rhash_insert,
689 		.activate	= nft_rhash_activate,
690 		.deactivate	= nft_rhash_deactivate,
691 		.flush		= nft_rhash_flush,
692 		.remove		= nft_rhash_remove,
693 		.lookup		= nft_rhash_lookup,
694 		.update		= nft_rhash_update,
695 		.delete		= nft_rhash_delete,
696 		.walk		= nft_rhash_walk,
697 		.get		= nft_rhash_get,
698 	},
699 };
700 
701 const struct nft_set_type nft_set_hash_type = {
702 	.features	= NFT_SET_MAP | NFT_SET_OBJECT,
703 	.ops		= {
704 		.privsize       = nft_hash_privsize,
705 		.elemsize	= offsetof(struct nft_hash_elem, ext),
706 		.estimate	= nft_hash_estimate,
707 		.init		= nft_hash_init,
708 		.destroy	= nft_hash_destroy,
709 		.insert		= nft_hash_insert,
710 		.activate	= nft_hash_activate,
711 		.deactivate	= nft_hash_deactivate,
712 		.flush		= nft_hash_flush,
713 		.remove		= nft_hash_remove,
714 		.lookup		= nft_hash_lookup,
715 		.walk		= nft_hash_walk,
716 		.get		= nft_hash_get,
717 	},
718 };
719 
720 const struct nft_set_type nft_set_hash_fast_type = {
721 	.features	= NFT_SET_MAP | NFT_SET_OBJECT,
722 	.ops		= {
723 		.privsize       = nft_hash_privsize,
724 		.elemsize	= offsetof(struct nft_hash_elem, ext),
725 		.estimate	= nft_hash_fast_estimate,
726 		.init		= nft_hash_init,
727 		.destroy	= nft_hash_destroy,
728 		.insert		= nft_hash_insert,
729 		.activate	= nft_hash_activate,
730 		.deactivate	= nft_hash_deactivate,
731 		.flush		= nft_hash_flush,
732 		.remove		= nft_hash_remove,
733 		.lookup		= nft_hash_lookup_fast,
734 		.walk		= nft_hash_walk,
735 		.get		= nft_hash_get,
736 	},
737 };
738