net/netfilter/nft_set_hash.c

   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.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 void nft_rhash_walk(const struct nft_ctx *ctx, struct nft_set *set,
 238                            struct nft_set_iter *iter)
 239 {
 240         struct nft_rhash *priv = nft_set_priv(set);
 241         struct nft_rhash_elem *he;
 242         struct rhashtable_iter hti;
 243         struct nft_set_elem elem;
 244
 245         rhashtable_walk_enter(&priv->ht, &hti);
 246         rhashtable_walk_start(&hti);
 247
 248         while ((he = rhashtable_walk_next(&hti))) {
 249                 if (IS_ERR(he)) {
 250                         if (PTR_ERR(he) != -EAGAIN) {
 251                                 iter->err = PTR_ERR(he);
 252                                 break;
 253                         }
 254
 255                         continue;
 256                 }
 257
 258                 if (iter->count < iter->skip)
 259                         goto cont;
 260                 if (nft_set_elem_expired(&he->ext))
 261                         goto cont;
 262                 if (!nft_set_elem_active(&he->ext, iter->genmask))
 263                         goto cont;
 264
 265                 elem.priv = he;
 266
 267                 iter->err = iter->fn(ctx, set, iter, &elem);
 268                 if (iter->err < 0)
 269                         break;
 270
 271 cont:
 272                 iter->count++;
 273         }
 274         rhashtable_walk_stop(&hti);
 275         rhashtable_walk_exit(&hti);
 276 }
 277
 278 static void nft_rhash_gc(struct work_struct *work)
 279 {
 280         struct nft_set *set;
 281         struct nft_rhash_elem *he;
 282         struct nft_rhash *priv;
 283         struct nft_set_gc_batch *gcb = NULL;
 284         struct rhashtable_iter hti;
 285
 286         priv = container_of(work, struct nft_rhash, gc_work.work);
 287         set  = nft_set_container_of(priv);
 288
 289         rhashtable_walk_enter(&priv->ht, &hti);
 290         rhashtable_walk_start(&hti);
 291
 292         while ((he = rhashtable_walk_next(&hti))) {
 293                 if (IS_ERR(he)) {
 294                         if (PTR_ERR(he) != -EAGAIN)
 295                                 break;
 296                         continue;
 297                 }
 298
 299                 if (nft_set_ext_exists(&he->ext, NFT_SET_EXT_EXPR)) {
 300                         struct nft_expr *expr = nft_set_ext_expr(&he->ext);
 301
 302                         if (expr->ops->gc &&
 303                             expr->ops->gc(read_pnet(&set->net), expr))
 304                                 goto gc;
 305                 }
 306                 if (!nft_set_elem_expired(&he->ext))
 307                         continue;
 308 gc:
 309                 if (nft_set_elem_mark_busy(&he->ext))
 310                         continue;
 311
 312                 gcb = nft_set_gc_batch_check(set, gcb, GFP_ATOMIC);
 313                 if (gcb == NULL)
 314                         break;
 315                 rhashtable_remove_fast(&priv->ht, &he->node, nft_rhash_params);
 316                 atomic_dec(&set->nelems);
 317                 nft_set_gc_batch_add(gcb, he);
 318         }
 319         rhashtable_walk_stop(&hti);
 320         rhashtable_walk_exit(&hti);
 321
 322         nft_set_gc_batch_complete(gcb);
 323         queue_delayed_work(system_power_efficient_wq, &priv->gc_work,
 324                            nft_set_gc_interval(set));
 325 }
 326
 327 static u64 nft_rhash_privsize(const struct nlattr * const nla[],
 328                               const struct nft_set_desc *desc)
 329 {
 330         return sizeof(struct nft_rhash);
 331 }
 332
 333 static void nft_rhash_gc_init(const struct nft_set *set)
 334 {
 335         struct nft_rhash *priv = nft_set_priv(set);
 336
 337         queue_delayed_work(system_power_efficient_wq, &priv->gc_work,
 338                            nft_set_gc_interval(set));
 339 }
 340
 341 static int nft_rhash_init(const struct nft_set *set,
 342                           const struct nft_set_desc *desc,
 343                           const struct nlattr * const tb[])
 344 {
 345         struct nft_rhash *priv = nft_set_priv(set);
 346         struct rhashtable_params params = nft_rhash_params;
 347         int err;
 348
 349         params.nelem_hint = desc->size ?: NFT_RHASH_ELEMENT_HINT;
 350         params.key_len    = set->klen;
 351
 352         err = rhashtable_init(&priv->ht, &params);
 353         if (err < 0)
 354                 return err;
 355
 356         INIT_DEFERRABLE_WORK(&priv->gc_work, nft_rhash_gc);
 357         if (set->flags & NFT_SET_TIMEOUT)
 358                 nft_rhash_gc_init(set);
 359
 360         return 0;
 361 }
 362
 363 static void nft_rhash_elem_destroy(void *ptr, void *arg)
 364 {
 365         nft_set_elem_destroy(arg, ptr, true);
 366 }
 367
 368 static void nft_rhash_destroy(const struct nft_set *set)
 369 {
 370         struct nft_rhash *priv = nft_set_priv(set);
 371
 372         cancel_delayed_work_sync(&priv->gc_work);
 373         rcu_barrier();
 374         rhashtable_free_and_destroy(&priv->ht, nft_rhash_elem_destroy,
 375                                     (void *)set);
 376 }
 377
 378 static u32 nft_hash_buckets(u32 size)
 379 {
 380         return roundup_pow_of_two(size * 4 / 3);
 381 }
 382
 383 static bool nft_rhash_estimate(const struct nft_set_desc *desc, u32 features,
 384                                struct nft_set_estimate *est)
 385 {
 386         est->size   = ~0;
 387         est->lookup = NFT_SET_CLASS_O_1;
 388         est->space  = NFT_SET_CLASS_O_N;
 389
 390         return true;
 391 }
 392
 393 struct nft_hash {
 394         u32                             seed;
 395         u32                             buckets;
 396         struct hlist_head               table[];
 397 };
 398
 399 struct nft_hash_elem {
 400         struct hlist_node               node;
 401         struct nft_set_ext              ext;
 402 };
 403
 404 static bool nft_hash_lookup(const struct net *net, const struct nft_set *set,
 405                             const u32 *key, const struct nft_set_ext **ext)
 406 {
 407         struct nft_hash *priv = nft_set_priv(set);
 408         u8 genmask = nft_genmask_cur(net);
 409         const struct nft_hash_elem *he;
 410         u32 hash;
 411
 412         hash = jhash(key, set->klen, priv->seed);
 413         hash = reciprocal_scale(hash, priv->buckets);
 414         hlist_for_each_entry_rcu(he, &priv->table[hash], node) {
 415                 if (!memcmp(nft_set_ext_key(&he->ext), key, set->klen) &&
 416                     nft_set_elem_active(&he->ext, genmask)) {
 417                         *ext = &he->ext;
 418                         return true;
 419                 }
 420         }
 421         return false;
 422 }
 423
 424 static void *nft_hash_get(const struct net *net, const struct nft_set *set,
 425                           const struct nft_set_elem *elem, unsigned int flags)
 426 {
 427         struct nft_hash *priv = nft_set_priv(set);
 428         u8 genmask = nft_genmask_cur(net);
 429         struct nft_hash_elem *he;
 430         u32 hash;
 431
 432         hash = jhash(elem->key.val.data, set->klen, priv->seed);
 433         hash = reciprocal_scale(hash, priv->buckets);
 434         hlist_for_each_entry_rcu(he, &priv->table[hash], node) {
 435                 if (!memcmp(nft_set_ext_key(&he->ext), elem->key.val.data, set->klen) &&
 436                     nft_set_elem_active(&he->ext, genmask))
 437                         return he;
 438         }
 439         return ERR_PTR(-ENOENT);
 440 }
 441
 442 static bool nft_hash_lookup_fast(const struct net *net,
 443                                  const struct nft_set *set,
 444                                  const u32 *key, const struct nft_set_ext **ext)
 445 {
 446         struct nft_hash *priv = nft_set_priv(set);
 447         u8 genmask = nft_genmask_cur(net);
 448         const struct nft_hash_elem *he;
 449         u32 hash, k1, k2;
 450
 451         k1 = *key;
 452         hash = jhash_1word(k1, priv->seed);
 453         hash = reciprocal_scale(hash, priv->buckets);
 454         hlist_for_each_entry_rcu(he, &priv->table[hash], node) {
 455                 k2 = *(u32 *)nft_set_ext_key(&he->ext)->data;
 456                 if (k1 == k2 &&
 457                     nft_set_elem_active(&he->ext, genmask)) {
 458                         *ext = &he->ext;
 459                         return true;
 460                 }
 461         }
 462         return false;
 463 }
 464
 465 static u32 nft_jhash(const struct nft_set *set, const struct nft_hash *priv,
 466                      const struct nft_set_ext *ext)
 467 {
 468         const struct nft_data *key = nft_set_ext_key(ext);
 469         u32 hash, k1;
 470
 471         if (set->klen == 4) {
 472                 k1 = *(u32 *)key;
 473                 hash = jhash_1word(k1, priv->seed);
 474         } else {
 475                 hash = jhash(key, set->klen, priv->seed);
 476         }
 477         hash = reciprocal_scale(hash, priv->buckets);
 478
 479         return hash;
 480 }
 481
 482 static int nft_hash_insert(const struct net *net, const struct nft_set *set,
 483                            const struct nft_set_elem *elem,
 484                            struct nft_set_ext **ext)
 485 {
 486         struct nft_hash_elem *this = elem->priv, *he;
 487         struct nft_hash *priv = nft_set_priv(set);
 488         u8 genmask = nft_genmask_next(net);
 489         u32 hash;
 490
 491         hash = nft_jhash(set, priv, &this->ext);
 492         hlist_for_each_entry(he, &priv->table[hash], node) {
 493                 if (!memcmp(nft_set_ext_key(&this->ext),
 494                             nft_set_ext_key(&he->ext), set->klen) &&
 495                     nft_set_elem_active(&he->ext, genmask)) {
 496                         *ext = &he->ext;
 497                         return -EEXIST;
 498                 }
 499         }
 500         hlist_add_head_rcu(&this->node, &priv->table[hash]);
 501         return 0;
 502 }
 503
 504 static void nft_hash_activate(const struct net *net, const struct nft_set *set,
 505                               const struct nft_set_elem *elem)
 506 {
 507         struct nft_hash_elem *he = elem->priv;
 508
 509         nft_set_elem_change_active(net, set, &he->ext);
 510 }
 511
 512 static bool nft_hash_flush(const struct net *net,
 513                            const struct nft_set *set, void *priv)
 514 {
 515         struct nft_hash_elem *he = priv;
 516
 517         nft_set_elem_change_active(net, set, &he->ext);
 518         return true;
 519 }
 520
 521 static void *nft_hash_deactivate(const struct net *net,
 522                                  const struct nft_set *set,
 523                                  const struct nft_set_elem *elem)
 524 {
 525         struct nft_hash *priv = nft_set_priv(set);
 526         struct nft_hash_elem *this = elem->priv, *he;
 527         u8 genmask = nft_genmask_next(net);
 528         u32 hash;
 529
 530         hash = nft_jhash(set, priv, &this->ext);
 531         hlist_for_each_entry(he, &priv->table[hash], node) {
 532                 if (!memcmp(nft_set_ext_key(&he->ext), &elem->key.val,
 533                             set->klen) &&
 534                     nft_set_elem_active(&he->ext, genmask)) {
 535                         nft_set_elem_change_active(net, set, &he->ext);
 536                         return he;
 537                 }
 538         }
 539         return NULL;
 540 }
 541
 542 static void nft_hash_remove(const struct net *net,
 543                             const struct nft_set *set,
 544                             const struct nft_set_elem *elem)
 545 {
 546         struct nft_hash_elem *he = elem->priv;
 547
 548         hlist_del_rcu(&he->node);
 549 }
 550
 551 static void nft_hash_walk(const struct nft_ctx *ctx, struct nft_set *set,
 552                           struct nft_set_iter *iter)
 553 {
 554         struct nft_hash *priv = nft_set_priv(set);
 555         struct nft_hash_elem *he;
 556         struct nft_set_elem elem;
 557         int i;
 558
 559         for (i = 0; i < priv->buckets; i++) {
 560                 hlist_for_each_entry_rcu(he, &priv->table[i], node) {
 561                         if (iter->count < iter->skip)
 562                                 goto cont;
 563                         if (!nft_set_elem_active(&he->ext, iter->genmask))
 564                                 goto cont;
 565
 566                         elem.priv = he;
 567
 568                         iter->err = iter->fn(ctx, set, iter, &elem);
 569                         if (iter->err < 0)
 570                                 return;
 571 cont:
 572                         iter->count++;
 573                 }
 574         }
 575 }
 576
 577 static u64 nft_hash_privsize(const struct nlattr * const nla[],
 578                              const struct nft_set_desc *desc)
 579 {
 580         return sizeof(struct nft_hash) +
 581                nft_hash_buckets(desc->size) * sizeof(struct hlist_head);
 582 }
 583
 584 static int nft_hash_init(const struct nft_set *set,
 585                          const struct nft_set_desc *desc,
 586                          const struct nlattr * const tb[])
 587 {
 588         struct nft_hash *priv = nft_set_priv(set);
 589
 590         priv->buckets = nft_hash_buckets(desc->size);
 591         get_random_bytes(&priv->seed, sizeof(priv->seed));
 592
 593         return 0;
 594 }
 595
 596 static void nft_hash_destroy(const struct nft_set *set)
 597 {
 598         struct nft_hash *priv = nft_set_priv(set);
 599         struct nft_hash_elem *he;
 600         struct hlist_node *next;
 601         int i;
 602
 603         for (i = 0; i < priv->buckets; i++) {
 604                 hlist_for_each_entry_safe(he, next, &priv->table[i], node) {
 605                         hlist_del_rcu(&he->node);
 606                         nft_set_elem_destroy(set, he, true);
 607                 }
 608         }
 609 }
 610
 611 static bool nft_hash_estimate(const struct nft_set_desc *desc, u32 features,
 612                               struct nft_set_estimate *est)
 613 {
 614         if (!desc->size)
 615                 return false;
 616
 617         if (desc->klen == 4)
 618                 return false;
 619
 620         est->size   = sizeof(struct nft_hash) +
 621                       nft_hash_buckets(desc->size) * sizeof(struct hlist_head) +
 622                       desc->size * sizeof(struct nft_hash_elem);
 623         est->lookup = NFT_SET_CLASS_O_1;
 624         est->space  = NFT_SET_CLASS_O_N;
 625
 626         return true;
 627 }
 628
 629 static bool nft_hash_fast_estimate(const struct nft_set_desc *desc, u32 features,
 630                               struct nft_set_estimate *est)
 631 {
 632         if (!desc->size)
 633                 return false;
 634
 635         if (desc->klen != 4)
 636                 return false;
 637
 638         est->size   = sizeof(struct nft_hash) +
 639                       nft_hash_buckets(desc->size) * sizeof(struct hlist_head) +
 640                       desc->size * sizeof(struct nft_hash_elem);
 641         est->lookup = NFT_SET_CLASS_O_1;
 642         est->space  = NFT_SET_CLASS_O_N;
 643
 644         return true;
 645 }
 646
 647 struct nft_set_type nft_set_rhash_type __read_mostly = {
 648         .owner          = THIS_MODULE,
 649         .features       = NFT_SET_MAP | NFT_SET_OBJECT |
 650                           NFT_SET_TIMEOUT | NFT_SET_EVAL,
 651         .ops            = {
 652                 .privsize       = nft_rhash_privsize,
 653                 .elemsize       = offsetof(struct nft_rhash_elem, ext),
 654                 .estimate       = nft_rhash_estimate,
 655                 .init           = nft_rhash_init,
 656                 .gc_init        = nft_rhash_gc_init,
 657                 .destroy        = nft_rhash_destroy,
 658                 .insert         = nft_rhash_insert,
 659                 .activate       = nft_rhash_activate,
 660                 .deactivate     = nft_rhash_deactivate,
 661                 .flush          = nft_rhash_flush,
 662                 .remove         = nft_rhash_remove,
 663                 .lookup         = nft_rhash_lookup,
 664                 .update         = nft_rhash_update,
 665                 .walk           = nft_rhash_walk,
 666                 .get            = nft_rhash_get,
 667         },
 668 };
 669
 670 struct nft_set_type nft_set_hash_type __read_mostly = {
 671         .owner          = THIS_MODULE,
 672         .features       = NFT_SET_MAP | NFT_SET_OBJECT,
 673         .ops            = {
 674                 .privsize       = nft_hash_privsize,
 675                 .elemsize       = offsetof(struct nft_hash_elem, ext),
 676                 .estimate       = nft_hash_estimate,
 677                 .init           = nft_hash_init,
 678                 .destroy        = nft_hash_destroy,
 679                 .insert         = nft_hash_insert,
 680                 .activate       = nft_hash_activate,
 681                 .deactivate     = nft_hash_deactivate,
 682                 .flush          = nft_hash_flush,
 683                 .remove         = nft_hash_remove,
 684                 .lookup         = nft_hash_lookup,
 685                 .walk           = nft_hash_walk,
 686                 .get            = nft_hash_get,
 687         },
 688 };
 689
 690 struct nft_set_type nft_set_hash_fast_type __read_mostly = {
 691         .owner          = THIS_MODULE,
 692         .features       = NFT_SET_MAP | NFT_SET_OBJECT,
 693         .ops            = {
 694                 .privsize       = nft_hash_privsize,
 695                 .elemsize       = offsetof(struct nft_hash_elem, ext),
 696                 .estimate       = nft_hash_fast_estimate,
 697                 .init           = nft_hash_init,
 698                 .destroy        = nft_hash_destroy,
 699                 .insert         = nft_hash_insert,
 700                 .activate       = nft_hash_activate,
 701                 .deactivate     = nft_hash_deactivate,
 702                 .flush          = nft_hash_flush,
 703                 .remove         = nft_hash_remove,
 704                 .lookup         = nft_hash_lookup_fast,
 705                 .walk           = nft_hash_walk,
 706                 .get            = nft_hash_get,
 707         },
 708 };