net/sched/cls_flower.c

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