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 #include <linux/bitfield.h>
  15
  16 #include <linux/if_ether.h>
  17 #include <linux/in6.h>
  18 #include <linux/ip.h>
  19 #include <linux/mpls.h>
  20 #include <linux/ppp_defs.h>
  21
  22 #include <net/sch_generic.h>
  23 #include <net/pkt_cls.h>
  24 #include <net/pkt_sched.h>
  25 #include <net/ip.h>
  26 #include <net/flow_dissector.h>
  27 #include <net/geneve.h>
  28 #include <net/vxlan.h>
  29 #include <net/erspan.h>
  30 #include <net/gtp.h>
  31 #include <net/tc_wrapper.h>
  32
  33 #include <net/dst.h>
  34 #include <net/dst_metadata.h>
  35
  36 #include <uapi/linux/netfilter/nf_conntrack_common.h>
  37
  38 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \
  39                 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1)
  40 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \
  41                 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1)
  42
  43 struct fl_flow_key {
  44         struct flow_dissector_key_meta meta;
  45         struct flow_dissector_key_control control;
  46         struct flow_dissector_key_control enc_control;
  47         struct flow_dissector_key_basic basic;
  48         struct flow_dissector_key_eth_addrs eth;
  49         struct flow_dissector_key_vlan vlan;
  50         struct flow_dissector_key_vlan cvlan;
  51         union {
  52                 struct flow_dissector_key_ipv4_addrs ipv4;
  53                 struct flow_dissector_key_ipv6_addrs ipv6;
  54         };
  55         struct flow_dissector_key_ports tp;
  56         struct flow_dissector_key_icmp icmp;
  57         struct flow_dissector_key_arp arp;
  58         struct flow_dissector_key_keyid enc_key_id;
  59         union {
  60                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  61                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  62         };
  63         struct flow_dissector_key_ports enc_tp;
  64         struct flow_dissector_key_mpls mpls;
  65         struct flow_dissector_key_tcp tcp;
  66         struct flow_dissector_key_ip ip;
  67         struct flow_dissector_key_ip enc_ip;
  68         struct flow_dissector_key_enc_opts enc_opts;
  69         struct flow_dissector_key_ports_range tp_range;
  70         struct flow_dissector_key_ct ct;
  71         struct flow_dissector_key_hash hash;
  72         struct flow_dissector_key_num_of_vlans num_of_vlans;
  73         struct flow_dissector_key_pppoe pppoe;
  74         struct flow_dissector_key_l2tpv3 l2tpv3;
  75         struct flow_dissector_key_cfm cfm;
  76 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  77
  78 struct fl_flow_mask_range {
  79         unsigned short int start;
  80         unsigned short int end;
  81 };
  82
  83 struct fl_flow_mask {
  84         struct fl_flow_key key;
  85         struct fl_flow_mask_range range;
  86         u32 flags;
  87         struct rhash_head ht_node;
  88         struct rhashtable ht;
  89         struct rhashtable_params filter_ht_params;
  90         struct flow_dissector dissector;
  91         struct list_head filters;
  92         struct rcu_work rwork;
  93         struct list_head list;
  94         refcount_t refcnt;
  95 };
  96
  97 struct fl_flow_tmplt {
  98         struct fl_flow_key dummy_key;
  99         struct fl_flow_key mask;
 100         struct flow_dissector dissector;
 101         struct tcf_chain *chain;
 102 };
 103
 104 struct cls_fl_head {
 105         struct rhashtable ht;
 106         spinlock_t masks_lock; /* Protect masks list */
 107         struct list_head masks;
 108         struct list_head hw_filters;
 109         struct rcu_work rwork;
 110         struct idr handle_idr;
 111 };
 112
 113 struct cls_fl_filter {
 114         struct fl_flow_mask *mask;
 115         struct rhash_head ht_node;
 116         struct fl_flow_key mkey;
 117         struct tcf_exts exts;
 118         struct tcf_result res;
 119         struct fl_flow_key key;
 120         struct list_head list;
 121         struct list_head hw_list;
 122         u32 handle;
 123         u32 flags;
 124         u32 in_hw_count;
 125         u8 needs_tc_skb_ext:1;
 126         struct rcu_work rwork;
 127         struct net_device *hw_dev;
 128         /* Flower classifier is unlocked, which means that its reference counter
 129          * can be changed concurrently without any kind of external
 130          * synchronization. Use atomic reference counter to be concurrency-safe.
 131          */
 132         refcount_t refcnt;
 133         bool deleted;
 134 };
 135
 136 static const struct rhashtable_params mask_ht_params = {
 137         .key_offset = offsetof(struct fl_flow_mask, key),
 138         .key_len = sizeof(struct fl_flow_key),
 139         .head_offset = offsetof(struct fl_flow_mask, ht_node),
 140         .automatic_shrinking = true,
 141 };
 142
 143 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
 144 {
 145         return mask->range.end - mask->range.start;
 146 }
 147
 148 static void fl_mask_update_range(struct fl_flow_mask *mask)
 149 {
 150         const u8 *bytes = (const u8 *) &mask->key;
 151         size_t size = sizeof(mask->key);
 152         size_t i, first = 0, last;
 153
 154         for (i = 0; i < size; i++) {
 155                 if (bytes[i]) {
 156                         first = i;
 157                         break;
 158                 }
 159         }
 160         last = first;
 161         for (i = size - 1; i != first; i--) {
 162                 if (bytes[i]) {
 163                         last = i;
 164                         break;
 165                 }
 166         }
 167         mask->range.start = rounddown(first, sizeof(long));
 168         mask->range.end = roundup(last + 1, sizeof(long));
 169 }
 170
 171 static void *fl_key_get_start(struct fl_flow_key *key,
 172                               const struct fl_flow_mask *mask)
 173 {
 174         return (u8 *) key + mask->range.start;
 175 }
 176
 177 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 178                               struct fl_flow_mask *mask)
 179 {
 180         const long *lkey = fl_key_get_start(key, mask);
 181         const long *lmask = fl_key_get_start(&mask->key, mask);
 182         long *lmkey = fl_key_get_start(mkey, mask);
 183         int i;
 184
 185         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 186                 *lmkey++ = *lkey++ & *lmask++;
 187 }
 188
 189 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
 190                                struct fl_flow_mask *mask)
 191 {
 192         const long *lmask = fl_key_get_start(&mask->key, mask);
 193         const long *ltmplt;
 194         int i;
 195
 196         if (!tmplt)
 197                 return true;
 198         ltmplt = fl_key_get_start(&tmplt->mask, mask);
 199         for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
 200                 if (~*ltmplt++ & *lmask++)
 201                         return false;
 202         }
 203         return true;
 204 }
 205
 206 static void fl_clear_masked_range(struct fl_flow_key *key,
 207                                   struct fl_flow_mask *mask)
 208 {
 209         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 210 }
 211
 212 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
 213                                   struct fl_flow_key *key,
 214                                   struct fl_flow_key *mkey)
 215 {
 216         u16 min_mask, max_mask, min_val, max_val;
 217
 218         min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst);
 219         max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst);
 220         min_val = ntohs(filter->key.tp_range.tp_min.dst);
 221         max_val = ntohs(filter->key.tp_range.tp_max.dst);
 222
 223         if (min_mask && max_mask) {
 224                 if (ntohs(key->tp_range.tp.dst) < min_val ||
 225                     ntohs(key->tp_range.tp.dst) > max_val)
 226                         return false;
 227
 228                 /* skb does not have min and max values */
 229                 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst;
 230                 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst;
 231         }
 232         return true;
 233 }
 234
 235 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
 236                                   struct fl_flow_key *key,
 237                                   struct fl_flow_key *mkey)
 238 {
 239         u16 min_mask, max_mask, min_val, max_val;
 240
 241         min_mask = ntohs(filter->mask->key.tp_range.tp_min.src);
 242         max_mask = ntohs(filter->mask->key.tp_range.tp_max.src);
 243         min_val = ntohs(filter->key.tp_range.tp_min.src);
 244         max_val = ntohs(filter->key.tp_range.tp_max.src);
 245
 246         if (min_mask && max_mask) {
 247                 if (ntohs(key->tp_range.tp.src) < min_val ||
 248                     ntohs(key->tp_range.tp.src) > max_val)
 249                         return false;
 250
 251                 /* skb does not have min and max values */
 252                 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src;
 253                 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src;
 254         }
 255         return true;
 256 }
 257
 258 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
 259                                          struct fl_flow_key *mkey)
 260 {
 261         return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
 262                                       mask->filter_ht_params);
 263 }
 264
 265 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
 266                                              struct fl_flow_key *mkey,
 267                                              struct fl_flow_key *key)
 268 {
 269         struct cls_fl_filter *filter, *f;
 270
 271         list_for_each_entry_rcu(filter, &mask->filters, list) {
 272                 if (!fl_range_port_dst_cmp(filter, key, mkey))
 273                         continue;
 274
 275                 if (!fl_range_port_src_cmp(filter, key, mkey))
 276                         continue;
 277
 278                 f = __fl_lookup(mask, mkey);
 279                 if (f)
 280                         return f;
 281         }
 282         return NULL;
 283 }
 284
 285 static noinline_for_stack
 286 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key)
 287 {
 288         struct fl_flow_key mkey;
 289
 290         fl_set_masked_key(&mkey, key, mask);
 291         if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
 292                 return fl_lookup_range(mask, &mkey, key);
 293
 294         return __fl_lookup(mask, &mkey);
 295 }
 296
 297 static u16 fl_ct_info_to_flower_map[] = {
 298         [IP_CT_ESTABLISHED] =           TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 299                                         TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
 300         [IP_CT_RELATED] =               TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 301                                         TCA_FLOWER_KEY_CT_FLAGS_RELATED,
 302         [IP_CT_ESTABLISHED_REPLY] =     TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 303                                         TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED |
 304                                         TCA_FLOWER_KEY_CT_FLAGS_REPLY,
 305         [IP_CT_RELATED_REPLY] =         TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 306                                         TCA_FLOWER_KEY_CT_FLAGS_RELATED |
 307                                         TCA_FLOWER_KEY_CT_FLAGS_REPLY,
 308         [IP_CT_NEW] =                   TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 309                                         TCA_FLOWER_KEY_CT_FLAGS_NEW,
 310 };
 311
 312 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb,
 313                                   const struct tcf_proto *tp,
 314                                   struct tcf_result *res)
 315 {
 316         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 317         bool post_ct = tc_skb_cb(skb)->post_ct;
 318         u16 zone = tc_skb_cb(skb)->zone;
 319         struct fl_flow_key skb_key;
 320         struct fl_flow_mask *mask;
 321         struct cls_fl_filter *f;
 322
 323         list_for_each_entry_rcu(mask, &head->masks, list) {
 324                 flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
 325                 fl_clear_masked_range(&skb_key, mask);
 326
 327                 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
 328                 /* skb_flow_dissect() does not set n_proto in case an unknown
 329                  * protocol, so do it rather here.
 330                  */
 331                 skb_key.basic.n_proto = skb_protocol(skb, false);
 332                 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
 333                 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
 334                                     fl_ct_info_to_flower_map,
 335                                     ARRAY_SIZE(fl_ct_info_to_flower_map),
 336                                     post_ct, zone);
 337                 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key);
 338                 skb_flow_dissect(skb, &mask->dissector, &skb_key,
 339                                  FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP);
 340
 341                 f = fl_mask_lookup(mask, &skb_key);
 342                 if (f && !tc_skip_sw(f->flags)) {
 343                         *res = f->res;
 344                         return tcf_exts_exec(skb, &f->exts, res);
 345                 }
 346         }
 347         return -1;
 348 }
 349
 350 static int fl_init(struct tcf_proto *tp)
 351 {
 352         struct cls_fl_head *head;
 353
 354         head = kzalloc(sizeof(*head), GFP_KERNEL);
 355         if (!head)
 356                 return -ENOBUFS;
 357
 358         spin_lock_init(&head->masks_lock);
 359         INIT_LIST_HEAD_RCU(&head->masks);
 360         INIT_LIST_HEAD(&head->hw_filters);
 361         rcu_assign_pointer(tp->root, head);
 362         idr_init(&head->handle_idr);
 363
 364         return rhashtable_init(&head->ht, &mask_ht_params);
 365 }
 366
 367 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
 368 {
 369         /* temporary masks don't have their filters list and ht initialized */
 370         if (mask_init_done) {
 371                 WARN_ON(!list_empty(&mask->filters));
 372                 rhashtable_destroy(&mask->ht);
 373         }
 374         kfree(mask);
 375 }
 376
 377 static void fl_mask_free_work(struct work_struct *work)
 378 {
 379         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 380                                                  struct fl_flow_mask, rwork);
 381
 382         fl_mask_free(mask, true);
 383 }
 384
 385 static void fl_uninit_mask_free_work(struct work_struct *work)
 386 {
 387         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 388                                                  struct fl_flow_mask, rwork);
 389
 390         fl_mask_free(mask, false);
 391 }
 392
 393 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
 394 {
 395         if (!refcount_dec_and_test(&mask->refcnt))
 396                 return false;
 397
 398         rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
 399
 400         spin_lock(&head->masks_lock);
 401         list_del_rcu(&mask->list);
 402         spin_unlock(&head->masks_lock);
 403
 404         tcf_queue_work(&mask->rwork, fl_mask_free_work);
 405
 406         return true;
 407 }
 408
 409 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
 410 {
 411         /* Flower classifier only changes root pointer during init and destroy.
 412          * Users must obtain reference to tcf_proto instance before calling its
 413          * API, so tp->root pointer is protected from concurrent call to
 414          * fl_destroy() by reference counting.
 415          */
 416         return rcu_dereference_raw(tp->root);
 417 }
 418
 419 static void __fl_destroy_filter(struct cls_fl_filter *f)
 420 {
 421         if (f->needs_tc_skb_ext)
 422                 tc_skb_ext_tc_disable();
 423         tcf_exts_destroy(&f->exts);
 424         tcf_exts_put_net(&f->exts);
 425         kfree(f);
 426 }
 427
 428 static void fl_destroy_filter_work(struct work_struct *work)
 429 {
 430         struct cls_fl_filter *f = container_of(to_rcu_work(work),
 431                                         struct cls_fl_filter, rwork);
 432
 433         __fl_destroy_filter(f);
 434 }
 435
 436 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
 437                                  bool rtnl_held, struct netlink_ext_ack *extack)
 438 {
 439         struct tcf_block *block = tp->chain->block;
 440         struct flow_cls_offload cls_flower = {};
 441
 442         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 443         cls_flower.command = FLOW_CLS_DESTROY;
 444         cls_flower.cookie = (unsigned long) f;
 445
 446         tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
 447                             &f->flags, &f->in_hw_count, rtnl_held);
 448
 449 }
 450
 451 static int fl_hw_replace_filter(struct tcf_proto *tp,
 452                                 struct cls_fl_filter *f, bool rtnl_held,
 453                                 struct netlink_ext_ack *extack)
 454 {
 455         struct tcf_block *block = tp->chain->block;
 456         struct flow_cls_offload cls_flower = {};
 457         bool skip_sw = tc_skip_sw(f->flags);
 458         int err = 0;
 459
 460         cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
 461         if (!cls_flower.rule)
 462                 return -ENOMEM;
 463
 464         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 465         cls_flower.command = FLOW_CLS_REPLACE;
 466         cls_flower.cookie = (unsigned long) f;
 467         cls_flower.rule->match.dissector = &f->mask->dissector;
 468         cls_flower.rule->match.mask = &f->mask->key;
 469         cls_flower.rule->match.key = &f->mkey;
 470         cls_flower.classid = f->res.classid;
 471
 472         err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts,
 473                                       cls_flower.common.extack);
 474         if (err) {
 475                 kfree(cls_flower.rule);
 476
 477                 return skip_sw ? err : 0;
 478         }
 479
 480         err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
 481                               skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
 482         tc_cleanup_offload_action(&cls_flower.rule->action);
 483         kfree(cls_flower.rule);
 484
 485         if (err) {
 486                 fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
 487                 return err;
 488         }
 489
 490         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 491                 return -EINVAL;
 492
 493         return 0;
 494 }
 495
 496 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
 497                                bool rtnl_held)
 498 {
 499         struct tcf_block *block = tp->chain->block;
 500         struct flow_cls_offload cls_flower = {};
 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,
 508                          rtnl_held);
 509
 510         tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats);
 511 }
 512
 513 static void __fl_put(struct cls_fl_filter *f)
 514 {
 515         if (!refcount_dec_and_test(&f->refcnt))
 516                 return;
 517
 518         if (tcf_exts_get_net(&f->exts))
 519                 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
 520         else
 521                 __fl_destroy_filter(f);
 522 }
 523
 524 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
 525 {
 526         struct cls_fl_filter *f;
 527
 528         rcu_read_lock();
 529         f = idr_find(&head->handle_idr, handle);
 530         if (f && !refcount_inc_not_zero(&f->refcnt))
 531                 f = NULL;
 532         rcu_read_unlock();
 533
 534         return f;
 535 }
 536
 537 static struct tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle)
 538 {
 539         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 540         struct cls_fl_filter *f;
 541
 542         f = idr_find(&head->handle_idr, handle);
 543         return f ? &f->exts : NULL;
 544 }
 545
 546 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
 547                        bool *last, bool rtnl_held,
 548                        struct netlink_ext_ack *extack)
 549 {
 550         struct cls_fl_head *head = fl_head_dereference(tp);
 551
 552         *last = false;
 553
 554         spin_lock(&tp->lock);
 555         if (f->deleted) {
 556                 spin_unlock(&tp->lock);
 557                 return -ENOENT;
 558         }
 559
 560         f->deleted = true;
 561         rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
 562                                f->mask->filter_ht_params);
 563         idr_remove(&head->handle_idr, f->handle);
 564         list_del_rcu(&f->list);
 565         spin_unlock(&tp->lock);
 566
 567         *last = fl_mask_put(head, f->mask);
 568         if (!tc_skip_hw(f->flags))
 569                 fl_hw_destroy_filter(tp, f, rtnl_held, extack);
 570         tcf_unbind_filter(tp, &f->res);
 571         __fl_put(f);
 572
 573         return 0;
 574 }
 575
 576 static void fl_destroy_sleepable(struct work_struct *work)
 577 {
 578         struct cls_fl_head *head = container_of(to_rcu_work(work),
 579                                                 struct cls_fl_head,
 580                                                 rwork);
 581
 582         rhashtable_destroy(&head->ht);
 583         kfree(head);
 584         module_put(THIS_MODULE);
 585 }
 586
 587 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
 588                        struct netlink_ext_ack *extack)
 589 {
 590         struct cls_fl_head *head = fl_head_dereference(tp);
 591         struct fl_flow_mask *mask, *next_mask;
 592         struct cls_fl_filter *f, *next;
 593         bool last;
 594
 595         list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
 596                 list_for_each_entry_safe(f, next, &mask->filters, list) {
 597                         __fl_delete(tp, f, &last, rtnl_held, extack);
 598                         if (last)
 599                                 break;
 600                 }
 601         }
 602         idr_destroy(&head->handle_idr);
 603
 604         __module_get(THIS_MODULE);
 605         tcf_queue_work(&head->rwork, fl_destroy_sleepable);
 606 }
 607
 608 static void fl_put(struct tcf_proto *tp, void *arg)
 609 {
 610         struct cls_fl_filter *f = arg;
 611
 612         __fl_put(f);
 613 }
 614
 615 static void *fl_get(struct tcf_proto *tp, u32 handle)
 616 {
 617         struct cls_fl_head *head = fl_head_dereference(tp);
 618
 619         return __fl_get(head, handle);
 620 }
 621
 622 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 623         [TCA_FLOWER_UNSPEC]             = { .strict_start_type =
 624                                                 TCA_FLOWER_L2_MISS },
 625         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 626         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 627                                             .len = IFNAMSIZ },
 628         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 629         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 630         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 631         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 632         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 633         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 634         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 635         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 636         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 637         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 638         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 639         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 640         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 641         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 642         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 643         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 644         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 645         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 646         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 647         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 648         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 649         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 650         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 651         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 652         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 653         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 654         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 655         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 656         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 657         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 658         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 659         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 660         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 661         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 662         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 663         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 664         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 665         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 666         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 667         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 668         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 669         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 670         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 671         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 672         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 673         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 674         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 675         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 676         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 677         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 678         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 679         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 680         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 681         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 682         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 683         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 684         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 685         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 686         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 687         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 688         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 689         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 690         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 691         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 692         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 693         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 694         [TCA_FLOWER_KEY_MPLS_OPTS]      = { .type = NLA_NESTED },
 695         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 696         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 697         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 698         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 699         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 700         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 701         [TCA_FLOWER_KEY_CVLAN_ID]       = { .type = NLA_U16 },
 702         [TCA_FLOWER_KEY_CVLAN_PRIO]     = { .type = NLA_U8 },
 703         [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
 704         [TCA_FLOWER_KEY_ENC_IP_TOS]     = { .type = NLA_U8 },
 705         [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
 706         [TCA_FLOWER_KEY_ENC_IP_TTL]      = { .type = NLA_U8 },
 707         [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
 708         [TCA_FLOWER_KEY_ENC_OPTS]       = { .type = NLA_NESTED },
 709         [TCA_FLOWER_KEY_ENC_OPTS_MASK]  = { .type = NLA_NESTED },
 710         [TCA_FLOWER_KEY_CT_STATE]       =
 711                 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
 712         [TCA_FLOWER_KEY_CT_STATE_MASK]  =
 713                 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
 714         [TCA_FLOWER_KEY_CT_ZONE]        = { .type = NLA_U16 },
 715         [TCA_FLOWER_KEY_CT_ZONE_MASK]   = { .type = NLA_U16 },
 716         [TCA_FLOWER_KEY_CT_MARK]        = { .type = NLA_U32 },
 717         [TCA_FLOWER_KEY_CT_MARK_MASK]   = { .type = NLA_U32 },
 718         [TCA_FLOWER_KEY_CT_LABELS]      = { .type = NLA_BINARY,
 719                                             .len = 128 / BITS_PER_BYTE },
 720         [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
 721                                             .len = 128 / BITS_PER_BYTE },
 722         [TCA_FLOWER_FLAGS]              = { .type = NLA_U32 },
 723         [TCA_FLOWER_KEY_HASH]           = { .type = NLA_U32 },
 724         [TCA_FLOWER_KEY_HASH_MASK]      = { .type = NLA_U32 },
 725         [TCA_FLOWER_KEY_NUM_OF_VLANS]   = { .type = NLA_U8 },
 726         [TCA_FLOWER_KEY_PPPOE_SID]      = { .type = NLA_U16 },
 727         [TCA_FLOWER_KEY_PPP_PROTO]      = { .type = NLA_U16 },
 728         [TCA_FLOWER_KEY_L2TPV3_SID]     = { .type = NLA_U32 },
 729         [TCA_FLOWER_L2_MISS]            = NLA_POLICY_MAX(NLA_U8, 1),
 730         [TCA_FLOWER_KEY_CFM]            = { .type = NLA_NESTED },
 731 };
 732
 733 static const struct nla_policy
 734 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
 735         [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC]        = {
 736                 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN },
 737         [TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
 738         [TCA_FLOWER_KEY_ENC_OPTS_VXLAN]         = { .type = NLA_NESTED },
 739         [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN]        = { .type = NLA_NESTED },
 740         [TCA_FLOWER_KEY_ENC_OPTS_GTP]           = { .type = NLA_NESTED },
 741 };
 742
 743 static const struct nla_policy
 744 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
 745         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
 746         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
 747         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
 748                                                        .len = 128 },
 749 };
 750
 751 static const struct nla_policy
 752 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = {
 753         [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]         = { .type = NLA_U32 },
 754 };
 755
 756 static const struct nla_policy
 757 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
 758         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]        = { .type = NLA_U8 },
 759         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]      = { .type = NLA_U32 },
 760         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]        = { .type = NLA_U8 },
 761         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]       = { .type = NLA_U8 },
 762 };
 763
 764 static const struct nla_policy
 765 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = {
 766         [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]      = { .type = NLA_U8 },
 767         [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]           = { .type = NLA_U8 },
 768 };
 769
 770 static const struct nla_policy
 771 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = {
 772         [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]    = { .type = NLA_U8 },
 773         [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]      = { .type = NLA_U8 },
 774         [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]      = { .type = NLA_U8 },
 775         [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]       = { .type = NLA_U8 },
 776         [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]    = { .type = NLA_U32 },
 777 };
 778
 779 static const struct nla_policy cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX] = {
 780         [TCA_FLOWER_KEY_CFM_MD_LEVEL]   = NLA_POLICY_MAX(NLA_U8,
 781                                                 FLOW_DIS_CFM_MDL_MAX),
 782         [TCA_FLOWER_KEY_CFM_OPCODE]     = { .type = NLA_U8 },
 783 };
 784
 785 static void fl_set_key_val(struct nlattr **tb,
 786                            void *val, int val_type,
 787                            void *mask, int mask_type, int len)
 788 {
 789         if (!tb[val_type])
 790                 return;
 791         nla_memcpy(val, tb[val_type], len);
 792         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 793                 memset(mask, 0xff, len);
 794         else
 795                 nla_memcpy(mask, tb[mask_type], len);
 796 }
 797
 798 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
 799                                  struct fl_flow_key *mask,
 800                                  struct netlink_ext_ack *extack)
 801 {
 802         fl_set_key_val(tb, &key->tp_range.tp_min.dst,
 803                        TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst,
 804                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst));
 805         fl_set_key_val(tb, &key->tp_range.tp_max.dst,
 806                        TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst,
 807                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst));
 808         fl_set_key_val(tb, &key->tp_range.tp_min.src,
 809                        TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src,
 810                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src));
 811         fl_set_key_val(tb, &key->tp_range.tp_max.src,
 812                        TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src,
 813                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
 814
 815         if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) {
 816                 NL_SET_ERR_MSG(extack,
 817                                "Both min and max destination ports must be specified");
 818                 return -EINVAL;
 819         }
 820         if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) {
 821                 NL_SET_ERR_MSG(extack,
 822                                "Both min and max source ports must be specified");
 823                 return -EINVAL;
 824         }
 825         if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
 826             ntohs(key->tp_range.tp_max.dst) <=
 827             ntohs(key->tp_range.tp_min.dst)) {
 828                 NL_SET_ERR_MSG_ATTR(extack,
 829                                     tb[TCA_FLOWER_KEY_PORT_DST_MIN],
 830                                     "Invalid destination port range (min must be strictly smaller than max)");
 831                 return -EINVAL;
 832         }
 833         if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
 834             ntohs(key->tp_range.tp_max.src) <=
 835             ntohs(key->tp_range.tp_min.src)) {
 836                 NL_SET_ERR_MSG_ATTR(extack,
 837                                     tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
 838                                     "Invalid source port range (min must be strictly smaller than max)");
 839                 return -EINVAL;
 840         }
 841
 842         return 0;
 843 }
 844
 845 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse,
 846                                struct flow_dissector_key_mpls *key_val,
 847                                struct flow_dissector_key_mpls *key_mask,
 848                                struct netlink_ext_ack *extack)
 849 {
 850         struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1];
 851         struct flow_dissector_mpls_lse *lse_mask;
 852         struct flow_dissector_mpls_lse *lse_val;
 853         u8 lse_index;
 854         u8 depth;
 855         int err;
 856
 857         err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse,
 858                                mpls_stack_entry_policy, extack);
 859         if (err < 0)
 860                 return err;
 861
 862         if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) {
 863                 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\"");
 864                 return -EINVAL;
 865         }
 866
 867         depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]);
 868
 869         /* LSE depth starts at 1, for consistency with terminology used by
 870          * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets.
 871          */
 872         if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) {
 873                 NL_SET_ERR_MSG_ATTR(extack,
 874                                     tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH],
 875                                     "Invalid MPLS depth");
 876                 return -EINVAL;
 877         }
 878         lse_index = depth - 1;
 879
 880         dissector_set_mpls_lse(key_val, lse_index);
 881         dissector_set_mpls_lse(key_mask, lse_index);
 882
 883         lse_val = &key_val->ls[lse_index];
 884         lse_mask = &key_mask->ls[lse_index];
 885
 886         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) {
 887                 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]);
 888                 lse_mask->mpls_ttl = MPLS_TTL_MASK;
 889         }
 890         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) {
 891                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]);
 892
 893                 if (bos & ~MPLS_BOS_MASK) {
 894                         NL_SET_ERR_MSG_ATTR(extack,
 895                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS],
 896                                             "Bottom Of Stack (BOS) must be 0 or 1");
 897                         return -EINVAL;
 898                 }
 899                 lse_val->mpls_bos = bos;
 900                 lse_mask->mpls_bos = MPLS_BOS_MASK;
 901         }
 902         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) {
 903                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]);
 904
 905                 if (tc & ~MPLS_TC_MASK) {
 906                         NL_SET_ERR_MSG_ATTR(extack,
 907                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC],
 908                                             "Traffic Class (TC) must be between 0 and 7");
 909                         return -EINVAL;
 910                 }
 911                 lse_val->mpls_tc = tc;
 912                 lse_mask->mpls_tc = MPLS_TC_MASK;
 913         }
 914         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) {
 915                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]);
 916
 917                 if (label & ~MPLS_LABEL_MASK) {
 918                         NL_SET_ERR_MSG_ATTR(extack,
 919                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL],
 920                                             "Label must be between 0 and 1048575");
 921                         return -EINVAL;
 922                 }
 923                 lse_val->mpls_label = label;
 924                 lse_mask->mpls_label = MPLS_LABEL_MASK;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts,
 931                                 struct flow_dissector_key_mpls *key_val,
 932                                 struct flow_dissector_key_mpls *key_mask,
 933                                 struct netlink_ext_ack *extack)
 934 {
 935         struct nlattr *nla_lse;
 936         int rem;
 937         int err;
 938
 939         if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) {
 940                 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts,
 941                                     "NLA_F_NESTED is missing");
 942                 return -EINVAL;
 943         }
 944
 945         nla_for_each_nested(nla_lse, nla_mpls_opts, rem) {
 946                 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) {
 947                         NL_SET_ERR_MSG_ATTR(extack, nla_lse,
 948                                             "Invalid MPLS option type");
 949                         return -EINVAL;
 950                 }
 951
 952                 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack);
 953                 if (err < 0)
 954                         return err;
 955         }
 956         if (rem) {
 957                 NL_SET_ERR_MSG(extack,
 958                                "Bytes leftover after parsing MPLS options");
 959                 return -EINVAL;
 960         }
 961
 962         return 0;
 963 }
 964
 965 static int fl_set_key_mpls(struct nlattr **tb,
 966                            struct flow_dissector_key_mpls *key_val,
 967                            struct flow_dissector_key_mpls *key_mask,
 968                            struct netlink_ext_ack *extack)
 969 {
 970         struct flow_dissector_mpls_lse *lse_mask;
 971         struct flow_dissector_mpls_lse *lse_val;
 972
 973         if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) {
 974                 if (tb[TCA_FLOWER_KEY_MPLS_TTL] ||
 975                     tb[TCA_FLOWER_KEY_MPLS_BOS] ||
 976                     tb[TCA_FLOWER_KEY_MPLS_TC] ||
 977                     tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 978                         NL_SET_ERR_MSG_ATTR(extack,
 979                                             tb[TCA_FLOWER_KEY_MPLS_OPTS],
 980                                             "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute");
 981                         return -EBADMSG;
 982                 }
 983
 984                 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS],
 985                                             key_val, key_mask, extack);
 986         }
 987
 988         lse_val = &key_val->ls[0];
 989         lse_mask = &key_mask->ls[0];
 990
 991         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 992                 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 993                 lse_mask->mpls_ttl = MPLS_TTL_MASK;
 994                 dissector_set_mpls_lse(key_val, 0);
 995                 dissector_set_mpls_lse(key_mask, 0);
 996         }
 997         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 998                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 999
1000                 if (bos & ~MPLS_BOS_MASK) {
1001                         NL_SET_ERR_MSG_ATTR(extack,
1002                                             tb[TCA_FLOWER_KEY_MPLS_BOS],
1003                                             "Bottom Of Stack (BOS) must be 0 or 1");
1004                         return -EINVAL;
1005                 }
1006                 lse_val->mpls_bos = bos;
1007                 lse_mask->mpls_bos = MPLS_BOS_MASK;
1008                 dissector_set_mpls_lse(key_val, 0);
1009                 dissector_set_mpls_lse(key_mask, 0);
1010         }
1011         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
1012                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
1013
1014                 if (tc & ~MPLS_TC_MASK) {
1015                         NL_SET_ERR_MSG_ATTR(extack,
1016                                             tb[TCA_FLOWER_KEY_MPLS_TC],
1017                                             "Traffic Class (TC) must be between 0 and 7");
1018                         return -EINVAL;
1019                 }
1020                 lse_val->mpls_tc = tc;
1021                 lse_mask->mpls_tc = MPLS_TC_MASK;
1022                 dissector_set_mpls_lse(key_val, 0);
1023                 dissector_set_mpls_lse(key_mask, 0);
1024         }
1025         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
1026                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
1027
1028                 if (label & ~MPLS_LABEL_MASK) {
1029                         NL_SET_ERR_MSG_ATTR(extack,
1030                                             tb[TCA_FLOWER_KEY_MPLS_LABEL],
1031                                             "Label must be between 0 and 1048575");
1032                         return -EINVAL;
1033                 }
1034                 lse_val->mpls_label = label;
1035                 lse_mask->mpls_label = MPLS_LABEL_MASK;
1036                 dissector_set_mpls_lse(key_val, 0);
1037                 dissector_set_mpls_lse(key_mask, 0);
1038         }
1039         return 0;
1040 }
1041
1042 static void fl_set_key_vlan(struct nlattr **tb,
1043                             __be16 ethertype,
1044                             int vlan_id_key, int vlan_prio_key,
1045                             int vlan_next_eth_type_key,
1046                             struct flow_dissector_key_vlan *key_val,
1047                             struct flow_dissector_key_vlan *key_mask)
1048 {
1049 #define VLAN_PRIORITY_MASK      0x7
1050
1051         if (tb[vlan_id_key]) {
1052                 key_val->vlan_id =
1053                         nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
1054                 key_mask->vlan_id = VLAN_VID_MASK;
1055         }
1056         if (tb[vlan_prio_key]) {
1057                 key_val->vlan_priority =
1058                         nla_get_u8(tb[vlan_prio_key]) &
1059                         VLAN_PRIORITY_MASK;
1060                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
1061         }
1062         if (ethertype) {
1063                 key_val->vlan_tpid = ethertype;
1064                 key_mask->vlan_tpid = cpu_to_be16(~0);
1065         }
1066         if (tb[vlan_next_eth_type_key]) {
1067                 key_val->vlan_eth_type =
1068                         nla_get_be16(tb[vlan_next_eth_type_key]);
1069                 key_mask->vlan_eth_type = cpu_to_be16(~0);
1070         }
1071 }
1072
1073 static void fl_set_key_pppoe(struct nlattr **tb,
1074                              struct flow_dissector_key_pppoe *key_val,
1075                              struct flow_dissector_key_pppoe *key_mask,
1076                              struct fl_flow_key *key,
1077                              struct fl_flow_key *mask)
1078 {
1079         /* key_val::type must be set to ETH_P_PPP_SES
1080          * because ETH_P_PPP_SES was stored in basic.n_proto
1081          * which might get overwritten by ppp_proto
1082          * or might be set to 0, the role of key_val::type
1083          * is similar to vlan_key::tpid
1084          */
1085         key_val->type = htons(ETH_P_PPP_SES);
1086         key_mask->type = cpu_to_be16(~0);
1087
1088         if (tb[TCA_FLOWER_KEY_PPPOE_SID]) {
1089                 key_val->session_id =
1090                         nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]);
1091                 key_mask->session_id = cpu_to_be16(~0);
1092         }
1093         if (tb[TCA_FLOWER_KEY_PPP_PROTO]) {
1094                 key_val->ppp_proto =
1095                         nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]);
1096                 key_mask->ppp_proto = cpu_to_be16(~0);
1097
1098                 if (key_val->ppp_proto == htons(PPP_IP)) {
1099                         key->basic.n_proto = htons(ETH_P_IP);
1100                         mask->basic.n_proto = cpu_to_be16(~0);
1101                 } else if (key_val->ppp_proto == htons(PPP_IPV6)) {
1102                         key->basic.n_proto = htons(ETH_P_IPV6);
1103                         mask->basic.n_proto = cpu_to_be16(~0);
1104                 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) {
1105                         key->basic.n_proto = htons(ETH_P_MPLS_UC);
1106                         mask->basic.n_proto = cpu_to_be16(~0);
1107                 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) {
1108                         key->basic.n_proto = htons(ETH_P_MPLS_MC);
1109                         mask->basic.n_proto = cpu_to_be16(~0);
1110                 }
1111         } else {
1112                 key->basic.n_proto = 0;
1113                 mask->basic.n_proto = cpu_to_be16(0);
1114         }
1115 }
1116
1117 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
1118                             u32 *dissector_key, u32 *dissector_mask,
1119                             u32 flower_flag_bit, u32 dissector_flag_bit)
1120 {
1121         if (flower_mask & flower_flag_bit) {
1122                 *dissector_mask |= dissector_flag_bit;
1123                 if (flower_key & flower_flag_bit)
1124                         *dissector_key |= dissector_flag_bit;
1125         }
1126 }
1127
1128 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key,
1129                             u32 *flags_mask, struct netlink_ext_ack *extack)
1130 {
1131         u32 key, mask;
1132
1133         /* mask is mandatory for flags */
1134         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) {
1135                 NL_SET_ERR_MSG(extack, "Missing flags mask");
1136                 return -EINVAL;
1137         }
1138
1139         key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS]));
1140         mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
1141
1142         *flags_key  = 0;
1143         *flags_mask = 0;
1144
1145         fl_set_key_flag(key, mask, flags_key, flags_mask,
1146                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1147         fl_set_key_flag(key, mask, flags_key, flags_mask,
1148                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1149                         FLOW_DIS_FIRST_FRAG);
1150
1151         return 0;
1152 }
1153
1154 static void fl_set_key_ip(struct nlattr **tb, bool encap,
1155                           struct flow_dissector_key_ip *key,
1156                           struct flow_dissector_key_ip *mask)
1157 {
1158         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1159         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1160         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1161         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1162
1163         fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
1164         fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
1165 }
1166
1167 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
1168                              int depth, int option_len,
1169                              struct netlink_ext_ack *extack)
1170 {
1171         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
1172         struct nlattr *class = NULL, *type = NULL, *data = NULL;
1173         struct geneve_opt *opt;
1174         int err, data_len = 0;
1175
1176         if (option_len > sizeof(struct geneve_opt))
1177                 data_len = option_len - sizeof(struct geneve_opt);
1178
1179         if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4)
1180                 return -ERANGE;
1181
1182         opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
1183         memset(opt, 0xff, option_len);
1184         opt->length = data_len / 4;
1185         opt->r1 = 0;
1186         opt->r2 = 0;
1187         opt->r3 = 0;
1188
1189         /* If no mask has been prodived we assume an exact match. */
1190         if (!depth)
1191                 return sizeof(struct geneve_opt) + data_len;
1192
1193         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
1194                 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
1195                 return -EINVAL;
1196         }
1197
1198         err = nla_parse_nested_deprecated(tb,
1199                                           TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
1200                                           nla, geneve_opt_policy, extack);
1201         if (err < 0)
1202                 return err;
1203
1204         /* We are not allowed to omit any of CLASS, TYPE or DATA
1205          * fields from the key.
1206          */
1207         if (!option_len &&
1208             (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
1209              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
1210              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
1211                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
1212                 return -EINVAL;
1213         }
1214
1215         /* Omitting any of CLASS, TYPE or DATA fields is allowed
1216          * for the mask.
1217          */
1218         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
1219                 int new_len = key->enc_opts.len;
1220
1221                 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
1222                 data_len = nla_len(data);
1223                 if (data_len < 4) {
1224                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
1225                         return -ERANGE;
1226                 }
1227                 if (data_len % 4) {
1228                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
1229                         return -ERANGE;
1230                 }
1231
1232                 new_len += sizeof(struct geneve_opt) + data_len;
1233                 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
1234                 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
1235                         NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
1236                         return -ERANGE;
1237                 }
1238                 opt->length = data_len / 4;
1239                 memcpy(opt->opt_data, nla_data(data), data_len);
1240         }
1241
1242         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
1243                 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
1244                 opt->opt_class = nla_get_be16(class);
1245         }
1246
1247         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
1248                 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
1249                 opt->type = nla_get_u8(type);
1250         }
1251
1252         return sizeof(struct geneve_opt) + data_len;
1253 }
1254
1255 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1256                             int depth, int option_len,
1257                             struct netlink_ext_ack *extack)
1258 {
1259         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1];
1260         struct vxlan_metadata *md;
1261         int err;
1262
1263         md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1264         memset(md, 0xff, sizeof(*md));
1265
1266         if (!depth)
1267                 return sizeof(*md);
1268
1269         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) {
1270                 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask");
1271                 return -EINVAL;
1272         }
1273
1274         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla,
1275                                vxlan_opt_policy, extack);
1276         if (err < 0)
1277                 return err;
1278
1279         if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1280                 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
1281                 return -EINVAL;
1282         }
1283
1284         if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1285                 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]);
1286                 md->gbp &= VXLAN_GBP_MASK;
1287         }
1288
1289         return sizeof(*md);
1290 }
1291
1292 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1293                              int depth, int option_len,
1294                              struct netlink_ext_ack *extack)
1295 {
1296         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1];
1297         struct erspan_metadata *md;
1298         int err;
1299
1300         md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1301         memset(md, 0xff, sizeof(*md));
1302         md->version = 1;
1303
1304         if (!depth)
1305                 return sizeof(*md);
1306
1307         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) {
1308                 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask");
1309                 return -EINVAL;
1310         }
1311
1312         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla,
1313                                erspan_opt_policy, extack);
1314         if (err < 0)
1315                 return err;
1316
1317         if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) {
1318                 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
1319                 return -EINVAL;
1320         }
1321
1322         if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER])
1323                 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]);
1324
1325         if (md->version == 1) {
1326                 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1327                         NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
1328                         return -EINVAL;
1329                 }
1330                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1331                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
1332                         memset(&md->u, 0x00, sizeof(md->u));
1333                         md->u.index = nla_get_be32(nla);
1334                 }
1335         } else if (md->version == 2) {
1336                 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] ||
1337                                     !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) {
1338                         NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
1339                         return -EINVAL;
1340                 }
1341                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) {
1342                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR];
1343                         md->u.md2.dir = nla_get_u8(nla);
1344                 }
1345                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) {
1346                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID];
1347                         set_hwid(&md->u.md2, nla_get_u8(nla));
1348                 }
1349         } else {
1350                 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
1351                 return -EINVAL;
1352         }
1353
1354         return sizeof(*md);
1355 }
1356
1357 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key,
1358                           int depth, int option_len,
1359                           struct netlink_ext_ack *extack)
1360 {
1361         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1];
1362         struct gtp_pdu_session_info *sinfo;
1363         u8 len = key->enc_opts.len;
1364         int err;
1365
1366         sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len];
1367         memset(sinfo, 0xff, option_len);
1368
1369         if (!depth)
1370                 return sizeof(*sinfo);
1371
1372         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) {
1373                 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask");
1374                 return -EINVAL;
1375         }
1376
1377         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla,
1378                                gtp_opt_policy, extack);
1379         if (err < 0)
1380                 return err;
1381
1382         if (!option_len &&
1383             (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] ||
1384              !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) {
1385                 NL_SET_ERR_MSG_MOD(extack,
1386                                    "Missing tunnel key gtp option pdu type or qfi");
1387                 return -EINVAL;
1388         }
1389
1390         if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE])
1391                 sinfo->pdu_type =
1392                         nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]);
1393
1394         if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])
1395                 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]);
1396
1397         return sizeof(*sinfo);
1398 }
1399
1400 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
1401                           struct fl_flow_key *mask,
1402                           struct netlink_ext_ack *extack)
1403 {
1404         const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
1405         int err, option_len, key_depth, msk_depth = 0;
1406
1407         err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
1408                                              TCA_FLOWER_KEY_ENC_OPTS_MAX,
1409                                              enc_opts_policy, extack);
1410         if (err)
1411                 return err;
1412
1413         nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
1414
1415         if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
1416                 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
1417                                                      TCA_FLOWER_KEY_ENC_OPTS_MAX,
1418                                                      enc_opts_policy, extack);
1419                 if (err)
1420                         return err;
1421
1422                 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1423                 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1424                 if (!nla_ok(nla_opt_msk, msk_depth)) {
1425                         NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks");
1426                         return -EINVAL;
1427                 }
1428         }
1429
1430         nla_for_each_attr(nla_opt_key, nla_enc_key,
1431                           nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
1432                 switch (nla_type(nla_opt_key)) {
1433                 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
1434                         if (key->enc_opts.dst_opt_type &&
1435                             key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) {
1436                                 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
1437                                 return -EINVAL;
1438                         }
1439                         option_len = 0;
1440                         key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1441                         option_len = fl_set_geneve_opt(nla_opt_key, key,
1442                                                        key_depth, option_len,
1443                                                        extack);
1444                         if (option_len < 0)
1445                                 return option_len;
1446
1447                         key->enc_opts.len += option_len;
1448                         /* At the same time we need to parse through the mask
1449                          * in order to verify exact and mask attribute lengths.
1450                          */
1451                         mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1452                         option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1453                                                        msk_depth, option_len,
1454                                                        extack);
1455                         if (option_len < 0)
1456                                 return option_len;
1457
1458                         mask->enc_opts.len += option_len;
1459                         if (key->enc_opts.len != mask->enc_opts.len) {
1460                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1461                                 return -EINVAL;
1462                         }
1463                         break;
1464                 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN:
1465                         if (key->enc_opts.dst_opt_type) {
1466                                 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
1467                                 return -EINVAL;
1468                         }
1469                         option_len = 0;
1470                         key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1471                         option_len = fl_set_vxlan_opt(nla_opt_key, key,
1472                                                       key_depth, option_len,
1473                                                       extack);
1474                         if (option_len < 0)
1475                                 return option_len;
1476
1477                         key->enc_opts.len += option_len;
1478                         /* At the same time we need to parse through the mask
1479                          * in order to verify exact and mask attribute lengths.
1480                          */
1481                         mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1482                         option_len = fl_set_vxlan_opt(nla_opt_msk, mask,
1483                                                       msk_depth, option_len,
1484                                                       extack);
1485                         if (option_len < 0)
1486                                 return option_len;
1487
1488                         mask->enc_opts.len += option_len;
1489                         if (key->enc_opts.len != mask->enc_opts.len) {
1490                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1491                                 return -EINVAL;
1492                         }
1493                         break;
1494                 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN:
1495                         if (key->enc_opts.dst_opt_type) {
1496                                 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
1497                                 return -EINVAL;
1498                         }
1499                         option_len = 0;
1500                         key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1501                         option_len = fl_set_erspan_opt(nla_opt_key, key,
1502                                                        key_depth, option_len,
1503                                                        extack);
1504                         if (option_len < 0)
1505                                 return option_len;
1506
1507                         key->enc_opts.len += option_len;
1508                         /* At the same time we need to parse through the mask
1509                          * in order to verify exact and mask attribute lengths.
1510                          */
1511                         mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1512                         option_len = fl_set_erspan_opt(nla_opt_msk, mask,
1513                                                        msk_depth, option_len,
1514                                                        extack);
1515                         if (option_len < 0)
1516                                 return option_len;
1517
1518                         mask->enc_opts.len += option_len;
1519                         if (key->enc_opts.len != mask->enc_opts.len) {
1520                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1521                                 return -EINVAL;
1522                         }
1523                         break;
1524                 case TCA_FLOWER_KEY_ENC_OPTS_GTP:
1525                         if (key->enc_opts.dst_opt_type) {
1526                                 NL_SET_ERR_MSG_MOD(extack,
1527                                                    "Duplicate type for gtp options");
1528                                 return -EINVAL;
1529                         }
1530                         option_len = 0;
1531                         key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
1532                         option_len = fl_set_gtp_opt(nla_opt_key, key,
1533                                                     key_depth, option_len,
1534                                                     extack);
1535                         if (option_len < 0)
1536                                 return option_len;
1537
1538                         key->enc_opts.len += option_len;
1539                         /* At the same time we need to parse through the mask
1540                          * in order to verify exact and mask attribute lengths.
1541                          */
1542                         mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
1543                         option_len = fl_set_gtp_opt(nla_opt_msk, mask,
1544                                                     msk_depth, option_len,
1545                                                     extack);
1546                         if (option_len < 0)
1547                                 return option_len;
1548
1549                         mask->enc_opts.len += option_len;
1550                         if (key->enc_opts.len != mask->enc_opts.len) {
1551                                 NL_SET_ERR_MSG_MOD(extack,
1552                                                    "Key and mask miss aligned");
1553                                 return -EINVAL;
1554                         }
1555                         break;
1556                 default:
1557                         NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1558                         return -EINVAL;
1559                 }
1560
1561                 if (!msk_depth)
1562                         continue;
1563
1564                 if (!nla_ok(nla_opt_msk, msk_depth)) {
1565                         NL_SET_ERR_MSG(extack, "A mask attribute is invalid");
1566                         return -EINVAL;
1567                 }
1568                 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1569         }
1570
1571         return 0;
1572 }
1573
1574 static int fl_validate_ct_state(u16 state, struct nlattr *tb,
1575                                 struct netlink_ext_ack *extack)
1576 {
1577         if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) {
1578                 NL_SET_ERR_MSG_ATTR(extack, tb,
1579                                     "no trk, so no other flag can be set");
1580                 return -EINVAL;
1581         }
1582
1583         if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1584             state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
1585                 NL_SET_ERR_MSG_ATTR(extack, tb,
1586                                     "new and est are mutually exclusive");
1587                 return -EINVAL;
1588         }
1589
1590         if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID &&
1591             state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
1592                       TCA_FLOWER_KEY_CT_FLAGS_INVALID)) {
1593                 NL_SET_ERR_MSG_ATTR(extack, tb,
1594                                     "when inv is set, only trk may be set");
1595                 return -EINVAL;
1596         }
1597
1598         if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1599             state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) {
1600                 NL_SET_ERR_MSG_ATTR(extack, tb,
1601                                     "new and rpl are mutually exclusive");
1602                 return -EINVAL;
1603         }
1604
1605         return 0;
1606 }
1607
1608 static int fl_set_key_ct(struct nlattr **tb,
1609                          struct flow_dissector_key_ct *key,
1610                          struct flow_dissector_key_ct *mask,
1611                          struct netlink_ext_ack *extack)
1612 {
1613         if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1614                 int err;
1615
1616                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1617                         NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1618                         return -EOPNOTSUPP;
1619                 }
1620                 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1621                                &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1622                                sizeof(key->ct_state));
1623
1624                 err = fl_validate_ct_state(key->ct_state & mask->ct_state,
1625                                            tb[TCA_FLOWER_KEY_CT_STATE_MASK],
1626                                            extack);
1627                 if (err)
1628                         return err;
1629
1630         }
1631         if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1632                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1633                         NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1634                         return -EOPNOTSUPP;
1635                 }
1636                 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1637                                &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1638                                sizeof(key->ct_zone));
1639         }
1640         if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1641                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1642                         NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1643                         return -EOPNOTSUPP;
1644                 }
1645                 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1646                                &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1647                                sizeof(key->ct_mark));
1648         }
1649         if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1650                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1651                         NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1652                         return -EOPNOTSUPP;
1653                 }
1654                 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1655                                mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1656                                sizeof(key->ct_labels));
1657         }
1658
1659         return 0;
1660 }
1661
1662 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype,
1663                         struct fl_flow_key *key, struct fl_flow_key *mask,
1664                         int vthresh)
1665 {
1666         const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh;
1667
1668         if (!tb) {
1669                 *ethertype = 0;
1670                 return good_num_of_vlans;
1671         }
1672
1673         *ethertype = nla_get_be16(tb);
1674         if (good_num_of_vlans || eth_type_vlan(*ethertype))
1675                 return true;
1676
1677         key->basic.n_proto = *ethertype;
1678         mask->basic.n_proto = cpu_to_be16(~0);
1679         return false;
1680 }
1681
1682 static void fl_set_key_cfm_md_level(struct nlattr **tb,
1683                                     struct fl_flow_key *key,
1684                                     struct fl_flow_key *mask,
1685                                     struct netlink_ext_ack *extack)
1686 {
1687         u8 level;
1688
1689         if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL])
1690                 return;
1691
1692         level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]);
1693         key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level);
1694         mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK;
1695 }
1696
1697 static void fl_set_key_cfm_opcode(struct nlattr **tb,
1698                                   struct fl_flow_key *key,
1699                                   struct fl_flow_key *mask,
1700                                   struct netlink_ext_ack *extack)
1701 {
1702         fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE,
1703                        &mask->cfm.opcode, TCA_FLOWER_UNSPEC,
1704                        sizeof(key->cfm.opcode));
1705 }
1706
1707 static int fl_set_key_cfm(struct nlattr **tb,
1708                           struct fl_flow_key *key,
1709                           struct fl_flow_key *mask,
1710                           struct netlink_ext_ack *extack)
1711 {
1712         struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX];
1713         int err;
1714
1715         if (!tb[TCA_FLOWER_KEY_CFM])
1716                 return 0;
1717
1718         err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX,
1719                                tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack);
1720         if (err < 0)
1721                 return err;
1722
1723         fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack);
1724         fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack);
1725
1726         return 0;
1727 }
1728
1729 static int fl_set_key(struct net *net, struct nlattr **tb,
1730                       struct fl_flow_key *key, struct fl_flow_key *mask,
1731                       struct netlink_ext_ack *extack)
1732 {
1733         __be16 ethertype;
1734         int ret = 0;
1735
1736         if (tb[TCA_FLOWER_INDEV]) {
1737                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1738                 if (err < 0)
1739                         return err;
1740                 key->meta.ingress_ifindex = err;
1741                 mask->meta.ingress_ifindex = 0xffffffff;
1742         }
1743
1744         fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS,
1745                        &mask->meta.l2_miss, TCA_FLOWER_UNSPEC,
1746                        sizeof(key->meta.l2_miss));
1747
1748         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1749                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1750                        sizeof(key->eth.dst));
1751         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1752                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1753                        sizeof(key->eth.src));
1754         fl_set_key_val(tb, &key->num_of_vlans,
1755                        TCA_FLOWER_KEY_NUM_OF_VLANS,
1756                        &mask->num_of_vlans,
1757                        TCA_FLOWER_UNSPEC,
1758                        sizeof(key->num_of_vlans));
1759
1760         if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], &ethertype, key, mask, 0)) {
1761                 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1762                                 TCA_FLOWER_KEY_VLAN_PRIO,
1763                                 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1764                                 &key->vlan, &mask->vlan);
1765
1766                 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE],
1767                                 &ethertype, key, mask, 1)) {
1768                         fl_set_key_vlan(tb, ethertype,
1769                                         TCA_FLOWER_KEY_CVLAN_ID,
1770                                         TCA_FLOWER_KEY_CVLAN_PRIO,
1771                                         TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1772                                         &key->cvlan, &mask->cvlan);
1773                         fl_set_key_val(tb, &key->basic.n_proto,
1774                                        TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1775                                        &mask->basic.n_proto,
1776                                        TCA_FLOWER_UNSPEC,
1777                                        sizeof(key->basic.n_proto));
1778                 }
1779         }
1780
1781         if (key->basic.n_proto == htons(ETH_P_PPP_SES))
1782                 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask);
1783
1784         if (key->basic.n_proto == htons(ETH_P_IP) ||
1785             key->basic.n_proto == htons(ETH_P_IPV6)) {
1786                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1787                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1788                                sizeof(key->basic.ip_proto));
1789                 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1790         }
1791
1792         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1793                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1794                 mask->control.addr_type = ~0;
1795                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1796                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1797                                sizeof(key->ipv4.src));
1798                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1799                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1800                                sizeof(key->ipv4.dst));
1801         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1802                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1803                 mask->control.addr_type = ~0;
1804                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1805                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1806                                sizeof(key->ipv6.src));
1807                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1808                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1809                                sizeof(key->ipv6.dst));
1810         }
1811
1812         if (key->basic.ip_proto == IPPROTO_TCP) {
1813                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1814                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1815                                sizeof(key->tp.src));
1816                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1817                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1818                                sizeof(key->tp.dst));
1819                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1820                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1821                                sizeof(key->tcp.flags));
1822         } else if (key->basic.ip_proto == IPPROTO_UDP) {
1823                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1824                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1825                                sizeof(key->tp.src));
1826                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1827                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1828                                sizeof(key->tp.dst));
1829         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1830                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1831                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1832                                sizeof(key->tp.src));
1833                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1834                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1835                                sizeof(key->tp.dst));
1836         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1837                    key->basic.ip_proto == IPPROTO_ICMP) {
1838                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1839                                &mask->icmp.type,
1840                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1841                                sizeof(key->icmp.type));
1842                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1843                                &mask->icmp.code,
1844                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1845                                sizeof(key->icmp.code));
1846         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1847                    key->basic.ip_proto == IPPROTO_ICMPV6) {
1848                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1849                                &mask->icmp.type,
1850                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1851                                sizeof(key->icmp.type));
1852                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1853                                &mask->icmp.code,
1854                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1855                                sizeof(key->icmp.code));
1856         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1857                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1858                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack);
1859                 if (ret)
1860                         return ret;
1861         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1862                    key->basic.n_proto == htons(ETH_P_RARP)) {
1863                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1864                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1865                                sizeof(key->arp.sip));
1866                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1867                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1868                                sizeof(key->arp.tip));
1869                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1870                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1871                                sizeof(key->arp.op));
1872                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1873                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1874                                sizeof(key->arp.sha));
1875                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1876                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1877                                sizeof(key->arp.tha));
1878         } else if (key->basic.ip_proto == IPPROTO_L2TP) {
1879                 fl_set_key_val(tb, &key->l2tpv3.session_id,
1880                                TCA_FLOWER_KEY_L2TPV3_SID,
1881                                &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC,
1882                                sizeof(key->l2tpv3.session_id));
1883         } else if (key->basic.n_proto  == htons(ETH_P_CFM)) {
1884                 ret = fl_set_key_cfm(tb, key, mask, extack);
1885                 if (ret)
1886                         return ret;
1887         }
1888
1889         if (key->basic.ip_proto == IPPROTO_TCP ||
1890             key->basic.ip_proto == IPPROTO_UDP ||
1891             key->basic.ip_proto == IPPROTO_SCTP) {
1892                 ret = fl_set_key_port_range(tb, key, mask, extack);
1893                 if (ret)
1894                         return ret;
1895         }
1896
1897         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1898             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1899                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1900                 mask->enc_control.addr_type = ~0;
1901                 fl_set_key_val(tb, &key->enc_ipv4.src,
1902                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
1903                                &mask->enc_ipv4.src,
1904                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1905                                sizeof(key->enc_ipv4.src));
1906                 fl_set_key_val(tb, &key->enc_ipv4.dst,
1907                                TCA_FLOWER_KEY_ENC_IPV4_DST,
1908                                &mask->enc_ipv4.dst,
1909                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1910                                sizeof(key->enc_ipv4.dst));
1911         }
1912
1913         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1914             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1915                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1916                 mask->enc_control.addr_type = ~0;
1917                 fl_set_key_val(tb, &key->enc_ipv6.src,
1918                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
1919                                &mask->enc_ipv6.src,
1920                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1921                                sizeof(key->enc_ipv6.src));
1922                 fl_set_key_val(tb, &key->enc_ipv6.dst,
1923                                TCA_FLOWER_KEY_ENC_IPV6_DST,
1924                                &mask->enc_ipv6.dst,
1925                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1926                                sizeof(key->enc_ipv6.dst));
1927         }
1928
1929         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1930                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1931                        sizeof(key->enc_key_id.keyid));
1932
1933         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1934                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1935                        sizeof(key->enc_tp.src));
1936
1937         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1938                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1939                        sizeof(key->enc_tp.dst));
1940
1941         fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1942
1943         fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
1944                        &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
1945                        sizeof(key->hash.hash));
1946
1947         if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1948                 ret = fl_set_enc_opt(tb, key, mask, extack);
1949                 if (ret)
1950                         return ret;
1951         }
1952
1953         ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1954         if (ret)
1955                 return ret;
1956
1957         if (tb[TCA_FLOWER_KEY_FLAGS])
1958                 ret = fl_set_key_flags(tb, &key->control.flags,
1959                                        &mask->control.flags, extack);
1960
1961         return ret;
1962 }
1963
1964 static void fl_mask_copy(struct fl_flow_mask *dst,
1965                          struct fl_flow_mask *src)
1966 {
1967         const void *psrc = fl_key_get_start(&src->key, src);
1968         void *pdst = fl_key_get_start(&dst->key, src);
1969
1970         memcpy(pdst, psrc, fl_mask_range(src));
1971         dst->range = src->range;
1972 }
1973
1974 static const struct rhashtable_params fl_ht_params = {
1975         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1976         .head_offset = offsetof(struct cls_fl_filter, ht_node),
1977         .automatic_shrinking = true,
1978 };
1979
1980 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1981 {
1982         mask->filter_ht_params = fl_ht_params;
1983         mask->filter_ht_params.key_len = fl_mask_range(mask);
1984         mask->filter_ht_params.key_offset += mask->range.start;
1985
1986         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1987 }
1988
1989 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1990 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member)
1991
1992 #define FL_KEY_IS_MASKED(mask, member)                                          \
1993         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
1994                    0, FL_KEY_MEMBER_SIZE(member))                               \
1995
1996 #define FL_KEY_SET(keys, cnt, id, member)                                       \
1997         do {                                                                    \
1998                 keys[cnt].key_id = id;                                          \
1999                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
2000                 cnt++;                                                          \
2001         } while(0);
2002
2003 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
2004         do {                                                                    \
2005                 if (FL_KEY_IS_MASKED(mask, member))                             \
2006                         FL_KEY_SET(keys, cnt, id, member);                      \
2007         } while(0);
2008
2009 static void fl_init_dissector(struct flow_dissector *dissector,
2010                               struct fl_flow_key *mask)
2011 {
2012         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
2013         size_t cnt = 0;
2014
2015         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2016                              FLOW_DISSECTOR_KEY_META, meta);
2017         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
2018         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
2019         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2020                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
2021         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2022                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
2023         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2024                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
2025         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2026                              FLOW_DISSECTOR_KEY_PORTS, tp);
2027         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2028                              FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
2029         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2030                              FLOW_DISSECTOR_KEY_IP, ip);
2031         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2032                              FLOW_DISSECTOR_KEY_TCP, tcp);
2033         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2034                              FLOW_DISSECTOR_KEY_ICMP, icmp);
2035         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2036                              FLOW_DISSECTOR_KEY_ARP, arp);
2037         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2038                              FLOW_DISSECTOR_KEY_MPLS, mpls);
2039         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2040                              FLOW_DISSECTOR_KEY_VLAN, vlan);
2041         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2042                              FLOW_DISSECTOR_KEY_CVLAN, cvlan);
2043         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2044                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
2045         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2046                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
2047         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2048                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
2049         if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
2050             FL_KEY_IS_MASKED(mask, enc_ipv6))
2051                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
2052                            enc_control);
2053         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2054                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
2055         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2056                              FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
2057         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2058                              FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
2059         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2060                              FLOW_DISSECTOR_KEY_CT, ct);
2061         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2062                              FLOW_DISSECTOR_KEY_HASH, hash);
2063         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2064                              FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans);
2065         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2066                              FLOW_DISSECTOR_KEY_PPPOE, pppoe);
2067         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2068                              FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3);
2069         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2070                              FLOW_DISSECTOR_KEY_CFM, cfm);
2071
2072         skb_flow_dissector_init(dissector, keys, cnt);
2073 }
2074
2075 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
2076                                                struct fl_flow_mask *mask)
2077 {
2078         struct fl_flow_mask *newmask;
2079         int err;
2080
2081         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
2082         if (!newmask)
2083                 return ERR_PTR(-ENOMEM);
2084
2085         fl_mask_copy(newmask, mask);
2086
2087         if ((newmask->key.tp_range.tp_min.dst &&
2088              newmask->key.tp_range.tp_max.dst) ||
2089             (newmask->key.tp_range.tp_min.src &&
2090              newmask->key.tp_range.tp_max.src))
2091                 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
2092
2093         err = fl_init_mask_hashtable(newmask);
2094         if (err)
2095                 goto errout_free;
2096
2097         fl_init_dissector(&newmask->dissector, &newmask->key);
2098
2099         INIT_LIST_HEAD_RCU(&newmask->filters);
2100
2101         refcount_set(&newmask->refcnt, 1);
2102         err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
2103                                       &newmask->ht_node, mask_ht_params);
2104         if (err)
2105                 goto errout_destroy;
2106
2107         spin_lock(&head->masks_lock);
2108         list_add_tail_rcu(&newmask->list, &head->masks);
2109         spin_unlock(&head->masks_lock);
2110
2111         return newmask;
2112
2113 errout_destroy:
2114         rhashtable_destroy(&newmask->ht);
2115 errout_free:
2116         kfree(newmask);
2117
2118         return ERR_PTR(err);
2119 }
2120
2121 static int fl_check_assign_mask(struct cls_fl_head *head,
2122                                 struct cls_fl_filter *fnew,
2123                                 struct cls_fl_filter *fold,
2124                                 struct fl_flow_mask *mask)
2125 {
2126         struct fl_flow_mask *newmask;
2127         int ret = 0;
2128
2129         rcu_read_lock();
2130
2131         /* Insert mask as temporary node to prevent concurrent creation of mask
2132          * with same key. Any concurrent lookups with same key will return
2133          * -EAGAIN because mask's refcnt is zero.
2134          */
2135         fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
2136                                                        &mask->ht_node,
2137                                                        mask_ht_params);
2138         if (!fnew->mask) {
2139                 rcu_read_unlock();
2140
2141                 if (fold) {
2142                         ret = -EINVAL;
2143                         goto errout_cleanup;
2144                 }
2145
2146                 newmask = fl_create_new_mask(head, mask);
2147                 if (IS_ERR(newmask)) {
2148                         ret = PTR_ERR(newmask);
2149                         goto errout_cleanup;
2150                 }
2151
2152                 fnew->mask = newmask;
2153                 return 0;
2154         } else if (IS_ERR(fnew->mask)) {
2155                 ret = PTR_ERR(fnew->mask);
2156         } else if (fold && fold->mask != fnew->mask) {
2157                 ret = -EINVAL;
2158         } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
2159                 /* Mask was deleted concurrently, try again */
2160                 ret = -EAGAIN;
2161         }
2162         rcu_read_unlock();
2163         return ret;
2164
2165 errout_cleanup:
2166         rhashtable_remove_fast(&head->ht, &mask->ht_node,
2167                                mask_ht_params);
2168         return ret;
2169 }
2170
2171 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask)
2172 {
2173         return mask->meta.l2_miss;
2174 }
2175
2176 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
2177                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
2178                         unsigned long base, struct nlattr **tb,
2179                         struct nlattr *est,
2180                         struct fl_flow_tmplt *tmplt,
2181                         u32 flags, u32 fl_flags,
2182                         struct netlink_ext_ack *extack)
2183 {
2184         int err;
2185
2186         err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags,
2187                                    fl_flags, extack);
2188         if (err < 0)
2189                 return err;
2190
2191         if (tb[TCA_FLOWER_CLASSID]) {
2192                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
2193                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2194                         rtnl_lock();
2195                 tcf_bind_filter(tp, &f->res, base);
2196                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2197                         rtnl_unlock();
2198         }
2199
2200         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
2201         if (err)
2202                 return err;
2203
2204         fl_mask_update_range(mask);
2205         fl_set_masked_key(&f->mkey, &f->key, mask);
2206
2207         if (!fl_mask_fits_tmplt(tmplt, mask)) {
2208                 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
2209                 return -EINVAL;
2210         }
2211
2212         /* Enable tc skb extension if filter matches on data extracted from
2213          * this extension.
2214          */
2215         if (fl_needs_tc_skb_ext(&mask->key)) {
2216                 f->needs_tc_skb_ext = 1;
2217                 tc_skb_ext_tc_enable();
2218         }
2219
2220         return 0;
2221 }
2222
2223 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
2224                                struct cls_fl_filter *fold,
2225                                bool *in_ht)
2226 {
2227         struct fl_flow_mask *mask = fnew->mask;
2228         int err;
2229
2230         err = rhashtable_lookup_insert_fast(&mask->ht,
2231                                             &fnew->ht_node,
2232                                             mask->filter_ht_params);
2233         if (err) {
2234                 *in_ht = false;
2235                 /* It is okay if filter with same key exists when
2236                  * overwriting.
2237                  */
2238                 return fold && err == -EEXIST ? 0 : err;
2239         }
2240
2241         *in_ht = true;
2242         return 0;
2243 }
2244
2245 static int fl_change(struct net *net, struct sk_buff *in_skb,
2246                      struct tcf_proto *tp, unsigned long base,
2247                      u32 handle, struct nlattr **tca,
2248                      void **arg, u32 flags,
2249                      struct netlink_ext_ack *extack)
2250 {
2251         struct cls_fl_head *head = fl_head_dereference(tp);
2252         bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL);
2253         struct cls_fl_filter *fold = *arg;
2254         struct cls_fl_filter *fnew;
2255         struct fl_flow_mask *mask;
2256         struct nlattr **tb;
2257         bool in_ht;
2258         int err;
2259
2260         if (!tca[TCA_OPTIONS]) {
2261                 err = -EINVAL;
2262                 goto errout_fold;
2263         }
2264
2265         mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
2266         if (!mask) {
2267                 err = -ENOBUFS;
2268                 goto errout_fold;
2269         }
2270
2271         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2272         if (!tb) {
2273                 err = -ENOBUFS;
2274                 goto errout_mask_alloc;
2275         }
2276
2277         err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2278                                           tca[TCA_OPTIONS], fl_policy, NULL);
2279         if (err < 0)
2280                 goto errout_tb;
2281
2282         if (fold && handle && fold->handle != handle) {
2283                 err = -EINVAL;
2284                 goto errout_tb;
2285         }
2286
2287         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
2288         if (!fnew) {
2289                 err = -ENOBUFS;
2290                 goto errout_tb;
2291         }
2292         INIT_LIST_HEAD(&fnew->hw_list);
2293         refcount_set(&fnew->refcnt, 1);
2294
2295         if (tb[TCA_FLOWER_FLAGS]) {
2296                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
2297
2298                 if (!tc_flags_valid(fnew->flags)) {
2299                         kfree(fnew);
2300                         err = -EINVAL;
2301                         goto errout_tb;
2302                 }
2303         }
2304
2305         if (!fold) {
2306                 spin_lock(&tp->lock);
2307                 if (!handle) {
2308                         handle = 1;
2309                         err = idr_alloc_u32(&head->handle_idr, NULL, &handle,
2310                                             INT_MAX, GFP_ATOMIC);
2311                 } else {
2312                         err = idr_alloc_u32(&head->handle_idr, NULL, &handle,
2313                                             handle, GFP_ATOMIC);
2314
2315                         /* Filter with specified handle was concurrently
2316                          * inserted after initial check in cls_api. This is not
2317                          * necessarily an error if NLM_F_EXCL is not set in
2318                          * message flags. Returning EAGAIN will cause cls_api to
2319                          * try to update concurrently inserted rule.
2320                          */
2321                         if (err == -ENOSPC)
2322                                 err = -EAGAIN;
2323                 }
2324                 spin_unlock(&tp->lock);
2325
2326                 if (err) {
2327                         kfree(fnew);
2328                         goto errout_tb;
2329                 }
2330         }
2331         fnew->handle = handle;
2332
2333         err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle,
2334                                !tc_skip_hw(fnew->flags));
2335         if (err < 0)
2336                 goto errout_idr;
2337
2338         err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE],
2339                            tp->chain->tmplt_priv, flags, fnew->flags,
2340                            extack);
2341         if (err)
2342                 goto errout_idr;
2343
2344         err = fl_check_assign_mask(head, fnew, fold, mask);
2345         if (err)
2346                 goto errout_idr;
2347
2348         err = fl_ht_insert_unique(fnew, fold, &in_ht);
2349         if (err)
2350                 goto errout_mask;
2351
2352         if (!tc_skip_hw(fnew->flags)) {
2353                 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
2354                 if (err)
2355                         goto errout_ht;
2356         }
2357
2358         if (!tc_in_hw(fnew->flags))
2359                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
2360
2361         spin_lock(&tp->lock);
2362
2363         /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
2364          * proto again or create new one, if necessary.
2365          */
2366         if (tp->deleting) {
2367                 err = -EAGAIN;
2368                 goto errout_hw;
2369         }
2370
2371         if (fold) {
2372                 /* Fold filter was deleted concurrently. Retry lookup. */
2373                 if (fold->deleted) {
2374                         err = -EAGAIN;
2375                         goto errout_hw;
2376                 }
2377
2378                 fnew->handle = handle;
2379
2380                 if (!in_ht) {
2381                         struct rhashtable_params params =
2382                                 fnew->mask->filter_ht_params;
2383
2384                         err = rhashtable_insert_fast(&fnew->mask->ht,
2385                                                      &fnew->ht_node,
2386                                                      params);
2387                         if (err)
2388                                 goto errout_hw;
2389                         in_ht = true;
2390                 }
2391
2392                 refcount_inc(&fnew->refcnt);
2393                 rhashtable_remove_fast(&fold->mask->ht,
2394                                        &fold->ht_node,
2395                                        fold->mask->filter_ht_params);
2396                 idr_replace(&head->handle_idr, fnew, fnew->handle);
2397                 list_replace_rcu(&fold->list, &fnew->list);
2398                 fold->deleted = true;
2399
2400                 spin_unlock(&tp->lock);
2401
2402                 fl_mask_put(head, fold->mask);
2403                 if (!tc_skip_hw(fold->flags))
2404                         fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
2405                 tcf_unbind_filter(tp, &fold->res);
2406                 /* Caller holds reference to fold, so refcnt is always > 0
2407                  * after this.
2408                  */
2409                 refcount_dec(&fold->refcnt);
2410                 __fl_put(fold);
2411         } else {
2412                 idr_replace(&head->handle_idr, fnew, fnew->handle);
2413
2414                 refcount_inc(&fnew->refcnt);
2415                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
2416                 spin_unlock(&tp->lock);
2417         }
2418
2419         *arg = fnew;
2420
2421         kfree(tb);
2422         tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2423         return 0;
2424
2425 errout_ht:
2426         spin_lock(&tp->lock);
2427 errout_hw:
2428         fnew->deleted = true;
2429         spin_unlock(&tp->lock);
2430         if (!tc_skip_hw(fnew->flags))
2431                 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
2432         if (in_ht)
2433                 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
2434                                        fnew->mask->filter_ht_params);
2435 errout_mask:
2436         fl_mask_put(head, fnew->mask);
2437 errout_idr:
2438         if (!fold)
2439                 idr_remove(&head->handle_idr, fnew->handle);
2440         __fl_put(fnew);
2441 errout_tb:
2442         kfree(tb);
2443 errout_mask_alloc:
2444         tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2445 errout_fold:
2446         if (fold)
2447                 __fl_put(fold);
2448         return err;
2449 }
2450
2451 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
2452                      bool rtnl_held, struct netlink_ext_ack *extack)
2453 {
2454         struct cls_fl_head *head = fl_head_dereference(tp);
2455         struct cls_fl_filter *f = arg;
2456         bool last_on_mask;
2457         int err = 0;
2458
2459         err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
2460         *last = list_empty(&head->masks);
2461         __fl_put(f);
2462
2463         return err;
2464 }
2465
2466 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
2467                     bool rtnl_held)
2468 {
2469         struct cls_fl_head *head = fl_head_dereference(tp);
2470         unsigned long id = arg->cookie, tmp;
2471         struct cls_fl_filter *f;
2472
2473         arg->count = arg->skip;
2474
2475         rcu_read_lock();
2476         idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
2477                 /* don't return filters that are being deleted */
2478                 if (!f || !refcount_inc_not_zero(&f->refcnt))
2479                         continue;
2480                 rcu_read_unlock();
2481
2482                 if (arg->fn(tp, f, arg) < 0) {
2483                         __fl_put(f);
2484                         arg->stop = 1;
2485                         rcu_read_lock();
2486                         break;
2487                 }
2488                 __fl_put(f);
2489                 arg->count++;
2490                 rcu_read_lock();
2491         }
2492         rcu_read_unlock();
2493         arg->cookie = id;
2494 }
2495
2496 static struct cls_fl_filter *
2497 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
2498 {
2499         struct cls_fl_head *head = fl_head_dereference(tp);
2500
2501         spin_lock(&tp->lock);
2502         if (list_empty(&head->hw_filters)) {
2503                 spin_unlock(&tp->lock);
2504                 return NULL;
2505         }
2506
2507         if (!f)
2508                 f = list_entry(&head->hw_filters, struct cls_fl_filter,
2509                                hw_list);
2510         list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
2511                 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
2512                         spin_unlock(&tp->lock);
2513                         return f;
2514                 }
2515         }
2516
2517         spin_unlock(&tp->lock);
2518         return NULL;
2519 }
2520
2521 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
2522                         void *cb_priv, struct netlink_ext_ack *extack)
2523 {
2524         struct tcf_block *block = tp->chain->block;
2525         struct flow_cls_offload cls_flower = {};
2526         struct cls_fl_filter *f = NULL;
2527         int err;
2528
2529         /* hw_filters list can only be changed by hw offload functions after
2530          * obtaining rtnl lock. Make sure it is not changed while reoffload is
2531          * iterating it.
2532          */
2533         ASSERT_RTNL();
2534
2535         while ((f = fl_get_next_hw_filter(tp, f, add))) {
2536                 cls_flower.rule =
2537                         flow_rule_alloc(tcf_exts_num_actions(&f->exts));
2538                 if (!cls_flower.rule) {
2539                         __fl_put(f);
2540                         return -ENOMEM;
2541                 }
2542
2543                 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
2544                                            extack);
2545                 cls_flower.command = add ?
2546                         FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
2547                 cls_flower.cookie = (unsigned long)f;
2548                 cls_flower.rule->match.dissector = &f->mask->dissector;
2549                 cls_flower.rule->match.mask = &f->mask->key;
2550                 cls_flower.rule->match.key = &f->mkey;
2551
2552                 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts,
2553                                               cls_flower.common.extack);
2554                 if (err) {
2555                         kfree(cls_flower.rule);
2556                         if (tc_skip_sw(f->flags)) {
2557                                 __fl_put(f);
2558                                 return err;
2559                         }
2560                         goto next_flow;
2561                 }
2562
2563                 cls_flower.classid = f->res.classid;
2564
2565                 err = tc_setup_cb_reoffload(block, tp, add, cb,
2566                                             TC_SETUP_CLSFLOWER, &cls_flower,
2567                                             cb_priv, &f->flags,
2568                                             &f->in_hw_count);
2569                 tc_cleanup_offload_action(&cls_flower.rule->action);
2570                 kfree(cls_flower.rule);
2571
2572                 if (err) {
2573                         __fl_put(f);
2574                         return err;
2575                 }
2576 next_flow:
2577                 __fl_put(f);
2578         }
2579
2580         return 0;
2581 }
2582
2583 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
2584 {
2585         struct flow_cls_offload *cls_flower = type_data;
2586         struct cls_fl_filter *f =
2587                 (struct cls_fl_filter *) cls_flower->cookie;
2588         struct cls_fl_head *head = fl_head_dereference(tp);
2589
2590         spin_lock(&tp->lock);
2591         list_add(&f->hw_list, &head->hw_filters);
2592         spin_unlock(&tp->lock);
2593 }
2594
2595 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
2596 {
2597         struct flow_cls_offload *cls_flower = type_data;
2598         struct cls_fl_filter *f =
2599                 (struct cls_fl_filter *) cls_flower->cookie;
2600
2601         spin_lock(&tp->lock);
2602         if (!list_empty(&f->hw_list))
2603                 list_del_init(&f->hw_list);
2604         spin_unlock(&tp->lock);
2605 }
2606
2607 static int fl_hw_create_tmplt(struct tcf_chain *chain,
2608                               struct fl_flow_tmplt *tmplt)
2609 {
2610         struct flow_cls_offload cls_flower = {};
2611         struct tcf_block *block = chain->block;
2612
2613         cls_flower.rule = flow_rule_alloc(0);
2614         if (!cls_flower.rule)
2615                 return -ENOMEM;
2616
2617         cls_flower.common.chain_index = chain->index;
2618         cls_flower.command = FLOW_CLS_TMPLT_CREATE;
2619         cls_flower.cookie = (unsigned long) tmplt;
2620         cls_flower.rule->match.dissector = &tmplt->dissector;
2621         cls_flower.rule->match.mask = &tmplt->mask;
2622         cls_flower.rule->match.key = &tmplt->dummy_key;
2623
2624         /* We don't care if driver (any of them) fails to handle this
2625          * call. It serves just as a hint for it.
2626          */
2627         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2628         kfree(cls_flower.rule);
2629
2630         return 0;
2631 }
2632
2633 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
2634                                 struct fl_flow_tmplt *tmplt)
2635 {
2636         struct flow_cls_offload cls_flower = {};
2637         struct tcf_block *block = chain->block;
2638
2639         cls_flower.common.chain_index = chain->index;
2640         cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
2641         cls_flower.cookie = (unsigned long) tmplt;
2642
2643         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2644 }
2645
2646 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
2647                              struct nlattr **tca,
2648                              struct netlink_ext_ack *extack)
2649 {
2650         struct fl_flow_tmplt *tmplt;
2651         struct nlattr **tb;
2652         int err;
2653
2654         if (!tca[TCA_OPTIONS])
2655                 return ERR_PTR(-EINVAL);
2656
2657         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2658         if (!tb)
2659                 return ERR_PTR(-ENOBUFS);
2660         err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2661                                           tca[TCA_OPTIONS], fl_policy, NULL);
2662         if (err)
2663                 goto errout_tb;
2664
2665         tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
2666         if (!tmplt) {
2667                 err = -ENOMEM;
2668                 goto errout_tb;
2669         }
2670         tmplt->chain = chain;
2671         err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
2672         if (err)
2673                 goto errout_tmplt;
2674
2675         fl_init_dissector(&tmplt->dissector, &tmplt->mask);
2676
2677         err = fl_hw_create_tmplt(chain, tmplt);
2678         if (err)
2679                 goto errout_tmplt;
2680
2681         kfree(tb);
2682         return tmplt;
2683
2684 errout_tmplt:
2685         kfree(tmplt);
2686 errout_tb:
2687         kfree(tb);
2688         return ERR_PTR(err);
2689 }
2690
2691 static void fl_tmplt_destroy(void *tmplt_priv)
2692 {
2693         struct fl_flow_tmplt *tmplt = tmplt_priv;
2694
2695         fl_hw_destroy_tmplt(tmplt->chain, tmplt);
2696         kfree(tmplt);
2697 }
2698
2699 static int fl_dump_key_val(struct sk_buff *skb,
2700                            void *val, int val_type,
2701                            void *mask, int mask_type, int len)
2702 {
2703         int err;
2704
2705         if (!memchr_inv(mask, 0, len))
2706                 return 0;
2707         err = nla_put(skb, val_type, len, val);
2708         if (err)
2709                 return err;
2710         if (mask_type != TCA_FLOWER_UNSPEC) {
2711                 err = nla_put(skb, mask_type, len, mask);
2712                 if (err)
2713                         return err;
2714         }
2715         return 0;
2716 }
2717
2718 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2719                                   struct fl_flow_key *mask)
2720 {
2721         if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2722                             TCA_FLOWER_KEY_PORT_DST_MIN,
2723                             &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2724                             sizeof(key->tp_range.tp_min.dst)) ||
2725             fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2726                             TCA_FLOWER_KEY_PORT_DST_MAX,
2727                             &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2728                             sizeof(key->tp_range.tp_max.dst)) ||
2729             fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2730                             TCA_FLOWER_KEY_PORT_SRC_MIN,
2731                             &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2732                             sizeof(key->tp_range.tp_min.src)) ||
2733             fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2734                             TCA_FLOWER_KEY_PORT_SRC_MAX,
2735                             &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2736                             sizeof(key->tp_range.tp_max.src)))
2737                 return -1;
2738
2739         return 0;
2740 }
2741
2742 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb,
2743                                     struct flow_dissector_key_mpls *mpls_key,
2744                                     struct flow_dissector_key_mpls *mpls_mask,
2745                                     u8 lse_index)
2746 {
2747         struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index];
2748         struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index];
2749         int err;
2750
2751         err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH,
2752                          lse_index + 1);
2753         if (err)
2754                 return err;
2755
2756         if (lse_mask->mpls_ttl) {
2757                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL,
2758                                  lse_key->mpls_ttl);
2759                 if (err)
2760                         return err;
2761         }
2762         if (lse_mask->mpls_bos) {
2763                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS,
2764                                  lse_key->mpls_bos);
2765                 if (err)
2766                         return err;
2767         }
2768         if (lse_mask->mpls_tc) {
2769                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC,
2770                                  lse_key->mpls_tc);
2771                 if (err)
2772                         return err;
2773         }
2774         if (lse_mask->mpls_label) {
2775                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
2776                                   lse_key->mpls_label);
2777                 if (err)
2778                         return err;
2779         }
2780
2781         return 0;
2782 }
2783
2784 static int fl_dump_key_mpls_opts(struct sk_buff *skb,
2785                                  struct flow_dissector_key_mpls *mpls_key,
2786                                  struct flow_dissector_key_mpls *mpls_mask)
2787 {
2788         struct nlattr *opts;
2789         struct nlattr *lse;
2790         u8 lse_index;
2791         int err;
2792
2793         opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS);
2794         if (!opts)
2795                 return -EMSGSIZE;
2796
2797         for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) {
2798                 if (!(mpls_mask->used_lses & 1 << lse_index))
2799                         continue;
2800
2801                 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE);
2802                 if (!lse) {
2803                         err = -EMSGSIZE;
2804                         goto err_opts;
2805                 }
2806
2807                 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask,
2808                                                lse_index);
2809                 if (err)
2810                         goto err_opts_lse;
2811                 nla_nest_end(skb, lse);
2812         }
2813         nla_nest_end(skb, opts);
2814
2815         return 0;
2816
2817 err_opts_lse:
2818         nla_nest_cancel(skb, lse);
2819 err_opts:
2820         nla_nest_cancel(skb, opts);
2821
2822         return err;
2823 }
2824
2825 static int fl_dump_key_mpls(struct sk_buff *skb,
2826                             struct flow_dissector_key_mpls *mpls_key,
2827                             struct flow_dissector_key_mpls *mpls_mask)
2828 {
2829         struct flow_dissector_mpls_lse *lse_mask;
2830         struct flow_dissector_mpls_lse *lse_key;
2831         int err;
2832
2833         if (!mpls_mask->used_lses)
2834                 return 0;
2835
2836         lse_mask = &mpls_mask->ls[0];
2837         lse_key = &mpls_key->ls[0];
2838
2839         /* For backward compatibility, don't use the MPLS nested attributes if
2840          * the rule can be expressed using the old attributes.
2841          */
2842         if (mpls_mask->used_lses & ~1 ||
2843             (!lse_mask->mpls_ttl && !lse_mask->mpls_bos &&
2844              !lse_mask->mpls_tc && !lse_mask->mpls_label))
2845                 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask);
2846
2847         if (lse_mask->mpls_ttl) {
2848                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2849                                  lse_key->mpls_ttl);
2850                 if (err)
2851                         return err;
2852         }
2853         if (lse_mask->mpls_tc) {
2854                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2855                                  lse_key->mpls_tc);
2856                 if (err)
2857                         return err;
2858         }
2859         if (lse_mask->mpls_label) {
2860                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2861                                   lse_key->mpls_label);
2862                 if (err)
2863                         return err;
2864         }
2865         if (lse_mask->mpls_bos) {
2866                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2867                                  lse_key->mpls_bos);
2868                 if (err)
2869                         return err;
2870         }
2871         return 0;
2872 }
2873
2874 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2875                           struct flow_dissector_key_ip *key,
2876                           struct flow_dissector_key_ip *mask)
2877 {
2878         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2879         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2880         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2881         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2882
2883         if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2884             fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2885                 return -1;
2886
2887         return 0;
2888 }
2889
2890 static int fl_dump_key_vlan(struct sk_buff *skb,
2891                             int vlan_id_key, int vlan_prio_key,
2892                             struct flow_dissector_key_vlan *vlan_key,
2893                             struct flow_dissector_key_vlan *vlan_mask)
2894 {
2895         int err;
2896
2897         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2898                 return 0;
2899         if (vlan_mask->vlan_id) {
2900                 err = nla_put_u16(skb, vlan_id_key,
2901                                   vlan_key->vlan_id);
2902                 if (err)
2903                         return err;
2904         }
2905         if (vlan_mask->vlan_priority) {
2906                 err = nla_put_u8(skb, vlan_prio_key,
2907                                  vlan_key->vlan_priority);
2908                 if (err)
2909                         return err;
2910         }
2911         return 0;
2912 }
2913
2914 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2915                             u32 *flower_key, u32 *flower_mask,
2916                             u32 flower_flag_bit, u32 dissector_flag_bit)
2917 {
2918         if (dissector_mask & dissector_flag_bit) {
2919                 *flower_mask |= flower_flag_bit;
2920                 if (dissector_key & dissector_flag_bit)
2921                         *flower_key |= flower_flag_bit;
2922         }
2923 }
2924
2925 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2926 {
2927         u32 key, mask;
2928         __be32 _key, _mask;
2929         int err;
2930
2931         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2932                 return 0;
2933
2934         key = 0;
2935         mask = 0;
2936
2937         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2938                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2939         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2940                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2941                         FLOW_DIS_FIRST_FRAG);
2942
2943         _key = cpu_to_be32(key);
2944         _mask = cpu_to_be32(mask);
2945
2946         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2947         if (err)
2948                 return err;
2949
2950         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2951 }
2952
2953 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2954                                   struct flow_dissector_key_enc_opts *enc_opts)
2955 {
2956         struct geneve_opt *opt;
2957         struct nlattr *nest;
2958         int opt_off = 0;
2959
2960         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2961         if (!nest)
2962                 goto nla_put_failure;
2963
2964         while (enc_opts->len > opt_off) {
2965                 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2966
2967                 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2968                                  opt->opt_class))
2969                         goto nla_put_failure;
2970                 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2971                                opt->type))
2972                         goto nla_put_failure;
2973                 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2974                             opt->length * 4, opt->opt_data))
2975                         goto nla_put_failure;
2976
2977                 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2978         }
2979         nla_nest_end(skb, nest);
2980         return 0;
2981
2982 nla_put_failure:
2983         nla_nest_cancel(skb, nest);
2984         return -EMSGSIZE;
2985 }
2986
2987 static int fl_dump_key_vxlan_opt(struct sk_buff *skb,
2988                                  struct flow_dissector_key_enc_opts *enc_opts)
2989 {
2990         struct vxlan_metadata *md;
2991         struct nlattr *nest;
2992
2993         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN);
2994         if (!nest)
2995                 goto nla_put_failure;
2996
2997         md = (struct vxlan_metadata *)&enc_opts->data[0];
2998         if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp))
2999                 goto nla_put_failure;
3000
3001         nla_nest_end(skb, nest);
3002         return 0;
3003
3004 nla_put_failure:
3005         nla_nest_cancel(skb, nest);
3006         return -EMSGSIZE;
3007 }
3008
3009 static int fl_dump_key_erspan_opt(struct sk_buff *skb,
3010                                   struct flow_dissector_key_enc_opts *enc_opts)
3011 {
3012         struct erspan_metadata *md;
3013         struct nlattr *nest;
3014
3015         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN);
3016         if (!nest)
3017                 goto nla_put_failure;
3018
3019         md = (struct erspan_metadata *)&enc_opts->data[0];
3020         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version))
3021                 goto nla_put_failure;
3022
3023         if (md->version == 1 &&
3024             nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
3025                 goto nla_put_failure;
3026
3027         if (md->version == 2 &&
3028             (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR,
3029                         md->u.md2.dir) ||
3030              nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID,
3031                         get_hwid(&md->u.md2))))
3032                 goto nla_put_failure;
3033
3034         nla_nest_end(skb, nest);
3035         return 0;
3036
3037 nla_put_failure:
3038         nla_nest_cancel(skb, nest);
3039         return -EMSGSIZE;
3040 }
3041
3042 static int fl_dump_key_gtp_opt(struct sk_buff *skb,
3043                                struct flow_dissector_key_enc_opts *enc_opts)
3044
3045 {
3046         struct gtp_pdu_session_info *session_info;
3047         struct nlattr *nest;
3048
3049         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP);
3050         if (!nest)
3051                 goto nla_put_failure;
3052
3053         session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0];
3054
3055         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE,
3056                        session_info->pdu_type))
3057                 goto nla_put_failure;
3058
3059         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi))
3060                 goto nla_put_failure;
3061
3062         nla_nest_end(skb, nest);
3063         return 0;
3064
3065 nla_put_failure:
3066         nla_nest_cancel(skb, nest);
3067         return -EMSGSIZE;
3068 }
3069
3070 static int fl_dump_key_ct(struct sk_buff *skb,
3071                           struct flow_dissector_key_ct *key,
3072                           struct flow_dissector_key_ct *mask)
3073 {
3074         if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
3075             fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
3076                             &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
3077                             sizeof(key->ct_state)))
3078                 goto nla_put_failure;
3079
3080         if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
3081             fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
3082                             &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
3083                             sizeof(key->ct_zone)))
3084                 goto nla_put_failure;
3085
3086         if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
3087             fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
3088                             &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
3089                             sizeof(key->ct_mark)))
3090                 goto nla_put_failure;
3091
3092         if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
3093             fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
3094                             &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
3095                             sizeof(key->ct_labels)))
3096                 goto nla_put_failure;
3097
3098         return 0;
3099
3100 nla_put_failure:
3101         return -EMSGSIZE;
3102 }
3103
3104 static int fl_dump_key_cfm(struct sk_buff *skb,
3105                            struct flow_dissector_key_cfm *key,
3106                            struct flow_dissector_key_cfm *mask)
3107 {
3108         struct nlattr *opts;
3109         int err;
3110         u8 mdl;
3111
3112         if (!memchr_inv(mask, 0, sizeof(*mask)))
3113                 return 0;
3114
3115         opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM);
3116         if (!opts)
3117                 return -EMSGSIZE;
3118
3119         if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) {
3120                 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver);
3121                 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl);
3122                 if (err)
3123                         goto err_cfm_opts;
3124         }
3125
3126         if (mask->opcode) {
3127                 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode);
3128                 if (err)
3129                         goto err_cfm_opts;
3130         }
3131
3132         nla_nest_end(skb, opts);
3133
3134         return 0;
3135
3136 err_cfm_opts:
3137         nla_nest_cancel(skb, opts);
3138         return err;
3139 }
3140
3141 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
3142                                struct flow_dissector_key_enc_opts *enc_opts)
3143 {
3144         struct nlattr *nest;
3145         int err;
3146
3147         if (!enc_opts->len)
3148                 return 0;
3149
3150         nest = nla_nest_start_noflag(skb, enc_opt_type);
3151         if (!nest)
3152                 goto nla_put_failure;
3153
3154         switch (enc_opts->dst_opt_type) {
3155         case TUNNEL_GENEVE_OPT:
3156                 err = fl_dump_key_geneve_opt(skb, enc_opts);
3157                 if (err)
3158                         goto nla_put_failure;
3159                 break;
3160         case TUNNEL_VXLAN_OPT:
3161                 err = fl_dump_key_vxlan_opt(skb, enc_opts);
3162                 if (err)
3163                         goto nla_put_failure;
3164                 break;
3165         case TUNNEL_ERSPAN_OPT:
3166                 err = fl_dump_key_erspan_opt(skb, enc_opts);
3167                 if (err)
3168                         goto nla_put_failure;
3169                 break;
3170         case TUNNEL_GTP_OPT:
3171                 err = fl_dump_key_gtp_opt(skb, enc_opts);
3172                 if (err)
3173                         goto nla_put_failure;
3174                 break;
3175         default:
3176                 goto nla_put_failure;
3177         }
3178         nla_nest_end(skb, nest);
3179         return 0;
3180
3181 nla_put_failure:
3182         nla_nest_cancel(skb, nest);
3183         return -EMSGSIZE;
3184 }
3185
3186 static int fl_dump_key_enc_opt(struct sk_buff *skb,
3187                                struct flow_dissector_key_enc_opts *key_opts,
3188                                struct flow_dissector_key_enc_opts *msk_opts)
3189 {
3190         int err;
3191
3192         err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
3193         if (err)
3194                 return err;
3195
3196         return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
3197 }
3198
3199 static int fl_dump_key(struct sk_buff *skb, struct net *net,
3200                        struct fl_flow_key *key, struct fl_flow_key *mask)
3201 {
3202         if (mask->meta.ingress_ifindex) {
3203                 struct net_device *dev;
3204
3205                 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
3206                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
3207                         goto nla_put_failure;
3208         }
3209
3210         if (fl_dump_key_val(skb, &key->meta.l2_miss,
3211                             TCA_FLOWER_L2_MISS, &mask->meta.l2_miss,
3212                             TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss)))
3213                 goto nla_put_failure;
3214
3215         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
3216                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
3217                             sizeof(key->eth.dst)) ||
3218             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
3219                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
3220                             sizeof(key->eth.src)) ||
3221             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
3222                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
3223                             sizeof(key->basic.n_proto)))
3224                 goto nla_put_failure;
3225
3226         if (mask->num_of_vlans.num_of_vlans) {
3227                 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans))
3228                         goto nla_put_failure;
3229         }
3230
3231         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
3232                 goto nla_put_failure;
3233
3234         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
3235                              TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
3236                 goto nla_put_failure;
3237
3238         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
3239                              TCA_FLOWER_KEY_CVLAN_PRIO,
3240                              &key->cvlan, &mask->cvlan) ||
3241             (mask->cvlan.vlan_tpid &&
3242              nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
3243                           key->cvlan.vlan_tpid)))
3244                 goto nla_put_failure;
3245
3246         if (mask->basic.n_proto) {
3247                 if (mask->cvlan.vlan_eth_type) {
3248                         if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
3249                                          key->basic.n_proto))
3250                                 goto nla_put_failure;
3251                 } else if (mask->vlan.vlan_eth_type) {
3252                         if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
3253                                          key->vlan.vlan_eth_type))
3254                                 goto nla_put_failure;
3255                 }
3256         }
3257
3258         if ((key->basic.n_proto == htons(ETH_P_IP) ||
3259              key->basic.n_proto == htons(ETH_P_IPV6)) &&
3260             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
3261                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
3262                             sizeof(key->basic.ip_proto)) ||
3263             fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
3264                 goto nla_put_failure;
3265
3266         if (mask->pppoe.session_id) {
3267                 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID,
3268                                  key->pppoe.session_id))
3269                         goto nla_put_failure;
3270         }
3271         if (mask->basic.n_proto && mask->pppoe.ppp_proto) {
3272                 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO,
3273                                  key->pppoe.ppp_proto))
3274                         goto nla_put_failure;
3275         }
3276
3277         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3278             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
3279                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
3280                              sizeof(key->ipv4.src)) ||
3281              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
3282                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
3283                              sizeof(key->ipv4.dst))))
3284                 goto nla_put_failure;
3285         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3286                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
3287                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
3288                                   sizeof(key->ipv6.src)) ||
3289                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
3290                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
3291                                   sizeof(key->ipv6.dst))))
3292                 goto nla_put_failure;
3293
3294         if (key->basic.ip_proto == IPPROTO_TCP &&
3295             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
3296                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
3297                              sizeof(key->tp.src)) ||
3298              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
3299                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
3300                              sizeof(key->tp.dst)) ||
3301              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
3302                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
3303                              sizeof(key->tcp.flags))))
3304                 goto nla_put_failure;
3305         else if (key->basic.ip_proto == IPPROTO_UDP &&
3306                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
3307                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
3308                                   sizeof(key->tp.src)) ||
3309                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
3310                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
3311                                   sizeof(key->tp.dst))))
3312                 goto nla_put_failure;
3313         else if (key->basic.ip_proto == IPPROTO_SCTP &&
3314                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
3315                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
3316                                   sizeof(key->tp.src)) ||
3317                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
3318                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
3319                                   sizeof(key->tp.dst))))
3320                 goto nla_put_failure;
3321         else if (key->basic.n_proto == htons(ETH_P_IP) &&
3322                  key->basic.ip_proto == IPPROTO_ICMP &&
3323                  (fl_dump_key_val(skb, &key->icmp.type,
3324                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
3325                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
3326                                   sizeof(key->icmp.type)) ||
3327                   fl_dump_key_val(skb, &key->icmp.code,
3328                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
3329                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
3330                                   sizeof(key->icmp.code))))
3331                 goto nla_put_failure;
3332         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
3333                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
3334                  (fl_dump_key_val(skb, &key->icmp.type,
3335                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
3336                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
3337                                   sizeof(key->icmp.type)) ||
3338                   fl_dump_key_val(skb, &key->icmp.code,
3339                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
3340                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
3341                                   sizeof(key->icmp.code))))
3342                 goto nla_put_failure;
3343         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
3344                   key->basic.n_proto == htons(ETH_P_RARP)) &&
3345                  (fl_dump_key_val(skb, &key->arp.sip,
3346                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
3347                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
3348                                   sizeof(key->arp.sip)) ||
3349                   fl_dump_key_val(skb, &key->arp.tip,
3350                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
3351                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
3352                                   sizeof(key->arp.tip)) ||
3353                   fl_dump_key_val(skb, &key->arp.op,
3354                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
3355                                   TCA_FLOWER_KEY_ARP_OP_MASK,
3356                                   sizeof(key->arp.op)) ||
3357                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
3358                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
3359                                   sizeof(key->arp.sha)) ||
3360                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
3361                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
3362                                   sizeof(key->arp.tha))))
3363                 goto nla_put_failure;
3364         else if (key->basic.ip_proto == IPPROTO_L2TP &&
3365                  fl_dump_key_val(skb, &key->l2tpv3.session_id,
3366                                  TCA_FLOWER_KEY_L2TPV3_SID,
3367                                  &mask->l2tpv3.session_id,
3368                                  TCA_FLOWER_UNSPEC,
3369                                  sizeof(key->l2tpv3.session_id)))
3370                 goto nla_put_failure;
3371
3372         if ((key->basic.ip_proto == IPPROTO_TCP ||
3373              key->basic.ip_proto == IPPROTO_UDP ||
3374              key->basic.ip_proto == IPPROTO_SCTP) &&
3375              fl_dump_key_port_range(skb, key, mask))
3376                 goto nla_put_failure;
3377
3378         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3379             (fl_dump_key_val(skb, &key->enc_ipv4.src,
3380                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
3381                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
3382                             sizeof(key->enc_ipv4.src)) ||
3383              fl_dump_key_val(skb, &key->enc_ipv4.dst,
3384                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
3385                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
3386                              sizeof(key->enc_ipv4.dst))))
3387                 goto nla_put_failure;
3388         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3389                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
3390                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
3391                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
3392                             sizeof(key->enc_ipv6.src)) ||
3393                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
3394                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
3395                                  &mask->enc_ipv6.dst,
3396                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
3397                             sizeof(key->enc_ipv6.dst))))
3398                 goto nla_put_failure;
3399
3400         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
3401                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
3402                             sizeof(key->enc_key_id)) ||
3403             fl_dump_key_val(skb, &key->enc_tp.src,
3404                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
3405                             &mask->enc_tp.src,
3406                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
3407                             sizeof(key->enc_tp.src)) ||
3408             fl_dump_key_val(skb, &key->enc_tp.dst,
3409                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
3410                             &mask->enc_tp.dst,
3411                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
3412                             sizeof(key->enc_tp.dst)) ||
3413             fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
3414             fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
3415                 goto nla_put_failure;
3416
3417         if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
3418                 goto nla_put_failure;
3419
3420         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
3421                 goto nla_put_failure;
3422
3423         if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
3424                              &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
3425                              sizeof(key->hash.hash)))
3426                 goto nla_put_failure;
3427
3428         if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm))
3429                 goto nla_put_failure;
3430
3431         return 0;
3432
3433 nla_put_failure:
3434         return -EMSGSIZE;
3435 }
3436
3437 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
3438                    struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3439 {
3440         struct cls_fl_filter *f = fh;
3441         struct nlattr *nest;
3442         struct fl_flow_key *key, *mask;
3443         bool skip_hw;
3444
3445         if (!f)
3446                 return skb->len;
3447
3448         t->tcm_handle = f->handle;
3449
3450         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3451         if (!nest)
3452                 goto nla_put_failure;
3453
3454         spin_lock(&tp->lock);
3455
3456         if (f->res.classid &&
3457             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
3458                 goto nla_put_failure_locked;
3459
3460         key = &f->key;
3461         mask = &f->mask->key;
3462         skip_hw = tc_skip_hw(f->flags);
3463
3464         if (fl_dump_key(skb, net, key, mask))
3465                 goto nla_put_failure_locked;
3466
3467         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3468                 goto nla_put_failure_locked;
3469
3470         spin_unlock(&tp->lock);
3471
3472         if (!skip_hw)
3473                 fl_hw_update_stats(tp, f, rtnl_held);
3474
3475         if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
3476                 goto nla_put_failure;
3477
3478         if (tcf_exts_dump(skb, &f->exts))
3479                 goto nla_put_failure;
3480
3481         nla_nest_end(skb, nest);
3482
3483         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
3484                 goto nla_put_failure;
3485
3486         return skb->len;
3487
3488 nla_put_failure_locked:
3489         spin_unlock(&tp->lock);
3490 nla_put_failure:
3491         nla_nest_cancel(skb, nest);
3492         return -1;
3493 }
3494
3495 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh,
3496                          struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3497 {
3498         struct cls_fl_filter *f = fh;
3499         struct nlattr *nest;
3500         bool skip_hw;
3501
3502         if (!f)
3503                 return skb->len;
3504
3505         t->tcm_handle = f->handle;
3506
3507         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3508         if (!nest)
3509                 goto nla_put_failure;
3510
3511         spin_lock(&tp->lock);
3512
3513         skip_hw = tc_skip_hw(f->flags);
3514
3515         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3516                 goto nla_put_failure_locked;
3517
3518         spin_unlock(&tp->lock);
3519
3520         if (!skip_hw)
3521                 fl_hw_update_stats(tp, f, rtnl_held);
3522
3523         if (tcf_exts_terse_dump(skb, &f->exts))
3524                 goto nla_put_failure;
3525
3526         nla_nest_end(skb, nest);
3527
3528         return skb->len;
3529
3530 nla_put_failure_locked:
3531         spin_unlock(&tp->lock);
3532 nla_put_failure:
3533         nla_nest_cancel(skb, nest);
3534         return -1;
3535 }
3536
3537 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
3538 {
3539         struct fl_flow_tmplt *tmplt = tmplt_priv;
3540         struct fl_flow_key *key, *mask;
3541         struct nlattr *nest;
3542
3543         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3544         if (!nest)
3545                 goto nla_put_failure;
3546
3547         key = &tmplt->dummy_key;
3548         mask = &tmplt->mask;
3549
3550         if (fl_dump_key(skb, net, key, mask))
3551                 goto nla_put_failure;
3552
3553         nla_nest_end(skb, nest);
3554
3555         return skb->len;
3556
3557 nla_put_failure:
3558         nla_nest_cancel(skb, nest);
3559         return -EMSGSIZE;
3560 }
3561
3562 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
3563                           unsigned long base)
3564 {
3565         struct cls_fl_filter *f = fh;
3566
3567         tc_cls_bind_class(classid, cl, q, &f->res, base);
3568 }
3569
3570 static bool fl_delete_empty(struct tcf_proto *tp)
3571 {
3572         struct cls_fl_head *head = fl_head_dereference(tp);
3573
3574         spin_lock(&tp->lock);
3575         tp->deleting = idr_is_empty(&head->handle_idr);
3576         spin_unlock(&tp->lock);
3577
3578         return tp->deleting;
3579 }
3580
3581 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
3582         .kind           = "flower",
3583         .classify       = fl_classify,
3584         .init           = fl_init,
3585         .destroy        = fl_destroy,
3586         .get            = fl_get,
3587         .put            = fl_put,
3588         .change         = fl_change,
3589         .delete         = fl_delete,
3590         .delete_empty   = fl_delete_empty,
3591         .walk           = fl_walk,
3592         .reoffload      = fl_reoffload,
3593         .hw_add         = fl_hw_add,
3594         .hw_del         = fl_hw_del,
3595         .dump           = fl_dump,
3596         .terse_dump     = fl_terse_dump,
3597         .bind_class     = fl_bind_class,
3598         .tmplt_create   = fl_tmplt_create,
3599         .tmplt_destroy  = fl_tmplt_destroy,
3600         .tmplt_dump     = fl_tmplt_dump,
3601         .get_exts       = fl_get_exts,
3602         .owner          = THIS_MODULE,
3603         .flags          = TCF_PROTO_OPS_DOIT_UNLOCKED,
3604 };
3605
3606 static int __init cls_fl_init(void)
3607 {
3608         return register_tcf_proto_ops(&cls_fl_ops);
3609 }
3610
3611 static void __exit cls_fl_exit(void)
3612 {
3613         unregister_tcf_proto_ops(&cls_fl_ops);
3614 }
3615
3616 module_init(cls_fl_init);
3617 module_exit(cls_fl_exit);
3618
3619 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3620 MODULE_DESCRIPTION("Flower classifier");
3621 MODULE_LICENSE("GPL v2");