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             ntohs(key->tp_range.tp_max.dst) <=
 817             ntohs(key->tp_range.tp_min.dst)) {
 818                 NL_SET_ERR_MSG_ATTR(extack,
 819                                     tb[TCA_FLOWER_KEY_PORT_DST_MIN],
 820                                     "Invalid destination port range (min must be strictly smaller than max)");
 821                 return -EINVAL;
 822         }
 823         if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
 824             ntohs(key->tp_range.tp_max.src) <=
 825             ntohs(key->tp_range.tp_min.src)) {
 826                 NL_SET_ERR_MSG_ATTR(extack,
 827                                     tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
 828                                     "Invalid source port range (min must be strictly smaller than max)");
 829                 return -EINVAL;
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse,
 836                                struct flow_dissector_key_mpls *key_val,
 837                                struct flow_dissector_key_mpls *key_mask,
 838                                struct netlink_ext_ack *extack)
 839 {
 840         struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1];
 841         struct flow_dissector_mpls_lse *lse_mask;
 842         struct flow_dissector_mpls_lse *lse_val;
 843         u8 lse_index;
 844         u8 depth;
 845         int err;
 846
 847         err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse,
 848                                mpls_stack_entry_policy, extack);
 849         if (err < 0)
 850                 return err;
 851
 852         if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) {
 853                 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\"");
 854                 return -EINVAL;
 855         }
 856
 857         depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]);
 858
 859         /* LSE depth starts at 1, for consistency with terminology used by
 860          * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets.
 861          */
 862         if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) {
 863                 NL_SET_ERR_MSG_ATTR(extack,
 864                                     tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH],
 865                                     "Invalid MPLS depth");
 866                 return -EINVAL;
 867         }
 868         lse_index = depth - 1;
 869
 870         dissector_set_mpls_lse(key_val, lse_index);
 871         dissector_set_mpls_lse(key_mask, lse_index);
 872
 873         lse_val = &key_val->ls[lse_index];
 874         lse_mask = &key_mask->ls[lse_index];
 875
 876         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) {
 877                 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]);
 878                 lse_mask->mpls_ttl = MPLS_TTL_MASK;
 879         }
 880         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) {
 881                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]);
 882
 883                 if (bos & ~MPLS_BOS_MASK) {
 884                         NL_SET_ERR_MSG_ATTR(extack,
 885                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS],
 886                                             "Bottom Of Stack (BOS) must be 0 or 1");
 887                         return -EINVAL;
 888                 }
 889                 lse_val->mpls_bos = bos;
 890                 lse_mask->mpls_bos = MPLS_BOS_MASK;
 891         }
 892         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) {
 893                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]);
 894
 895                 if (tc & ~MPLS_TC_MASK) {
 896                         NL_SET_ERR_MSG_ATTR(extack,
 897                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC],
 898                                             "Traffic Class (TC) must be between 0 and 7");
 899                         return -EINVAL;
 900                 }
 901                 lse_val->mpls_tc = tc;
 902                 lse_mask->mpls_tc = MPLS_TC_MASK;
 903         }
 904         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) {
 905                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]);
 906
 907                 if (label & ~MPLS_LABEL_MASK) {
 908                         NL_SET_ERR_MSG_ATTR(extack,
 909                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL],
 910                                             "Label must be between 0 and 1048575");
 911                         return -EINVAL;
 912                 }
 913                 lse_val->mpls_label = label;
 914                 lse_mask->mpls_label = MPLS_LABEL_MASK;
 915         }
 916
 917         return 0;
 918 }
 919
 920 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts,
 921                                 struct flow_dissector_key_mpls *key_val,
 922                                 struct flow_dissector_key_mpls *key_mask,
 923                                 struct netlink_ext_ack *extack)
 924 {
 925         struct nlattr *nla_lse;
 926         int rem;
 927         int err;
 928
 929         if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) {
 930                 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts,
 931                                     "NLA_F_NESTED is missing");
 932                 return -EINVAL;
 933         }
 934
 935         nla_for_each_nested(nla_lse, nla_mpls_opts, rem) {
 936                 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) {
 937                         NL_SET_ERR_MSG_ATTR(extack, nla_lse,
 938                                             "Invalid MPLS option type");
 939                         return -EINVAL;
 940                 }
 941
 942                 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack);
 943                 if (err < 0)
 944                         return err;
 945         }
 946         if (rem) {
 947                 NL_SET_ERR_MSG(extack,
 948                                "Bytes leftover after parsing MPLS options");
 949                 return -EINVAL;
 950         }
 951
 952         return 0;
 953 }
 954
 955 static int fl_set_key_mpls(struct nlattr **tb,
 956                            struct flow_dissector_key_mpls *key_val,
 957                            struct flow_dissector_key_mpls *key_mask,
 958                            struct netlink_ext_ack *extack)
 959 {
 960         struct flow_dissector_mpls_lse *lse_mask;
 961         struct flow_dissector_mpls_lse *lse_val;
 962
 963         if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) {
 964                 if (tb[TCA_FLOWER_KEY_MPLS_TTL] ||
 965                     tb[TCA_FLOWER_KEY_MPLS_BOS] ||
 966                     tb[TCA_FLOWER_KEY_MPLS_TC] ||
 967                     tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 968                         NL_SET_ERR_MSG_ATTR(extack,
 969                                             tb[TCA_FLOWER_KEY_MPLS_OPTS],
 970                                             "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute");
 971                         return -EBADMSG;
 972                 }
 973
 974                 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS],
 975                                             key_val, key_mask, extack);
 976         }
 977
 978         lse_val = &key_val->ls[0];
 979         lse_mask = &key_mask->ls[0];
 980
 981         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 982                 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 983                 lse_mask->mpls_ttl = MPLS_TTL_MASK;
 984                 dissector_set_mpls_lse(key_val, 0);
 985                 dissector_set_mpls_lse(key_mask, 0);
 986         }
 987         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 988                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 989
 990                 if (bos & ~MPLS_BOS_MASK) {
 991                         NL_SET_ERR_MSG_ATTR(extack,
 992                                             tb[TCA_FLOWER_KEY_MPLS_BOS],
 993                                             "Bottom Of Stack (BOS) must be 0 or 1");
 994                         return -EINVAL;
 995                 }
 996                 lse_val->mpls_bos = bos;
 997                 lse_mask->mpls_bos = MPLS_BOS_MASK;
 998                 dissector_set_mpls_lse(key_val, 0);
 999                 dissector_set_mpls_lse(key_mask, 0);
1000         }
1001         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
1002                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
1003
1004                 if (tc & ~MPLS_TC_MASK) {
1005                         NL_SET_ERR_MSG_ATTR(extack,
1006                                             tb[TCA_FLOWER_KEY_MPLS_TC],
1007                                             "Traffic Class (TC) must be between 0 and 7");
1008                         return -EINVAL;
1009                 }
1010                 lse_val->mpls_tc = tc;
1011                 lse_mask->mpls_tc = MPLS_TC_MASK;
1012                 dissector_set_mpls_lse(key_val, 0);
1013                 dissector_set_mpls_lse(key_mask, 0);
1014         }
1015         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
1016                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
1017
1018                 if (label & ~MPLS_LABEL_MASK) {
1019                         NL_SET_ERR_MSG_ATTR(extack,
1020                                             tb[TCA_FLOWER_KEY_MPLS_LABEL],
1021                                             "Label must be between 0 and 1048575");
1022                         return -EINVAL;
1023                 }
1024                 lse_val->mpls_label = label;
1025                 lse_mask->mpls_label = MPLS_LABEL_MASK;
1026                 dissector_set_mpls_lse(key_val, 0);
1027                 dissector_set_mpls_lse(key_mask, 0);
1028         }
1029         return 0;
1030 }
1031
1032 static void fl_set_key_vlan(struct nlattr **tb,
1033                             __be16 ethertype,
1034                             int vlan_id_key, int vlan_prio_key,
1035                             int vlan_next_eth_type_key,
1036                             struct flow_dissector_key_vlan *key_val,
1037                             struct flow_dissector_key_vlan *key_mask)
1038 {
1039 #define VLAN_PRIORITY_MASK      0x7
1040
1041         if (tb[vlan_id_key]) {
1042                 key_val->vlan_id =
1043                         nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
1044                 key_mask->vlan_id = VLAN_VID_MASK;
1045         }
1046         if (tb[vlan_prio_key]) {
1047                 key_val->vlan_priority =
1048                         nla_get_u8(tb[vlan_prio_key]) &
1049                         VLAN_PRIORITY_MASK;
1050                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
1051         }
1052         if (ethertype) {
1053                 key_val->vlan_tpid = ethertype;
1054                 key_mask->vlan_tpid = cpu_to_be16(~0);
1055         }
1056         if (tb[vlan_next_eth_type_key]) {
1057                 key_val->vlan_eth_type =
1058                         nla_get_be16(tb[vlan_next_eth_type_key]);
1059                 key_mask->vlan_eth_type = cpu_to_be16(~0);
1060         }
1061 }
1062
1063 static void fl_set_key_pppoe(struct nlattr **tb,
1064                              struct flow_dissector_key_pppoe *key_val,
1065                              struct flow_dissector_key_pppoe *key_mask,
1066                              struct fl_flow_key *key,
1067                              struct fl_flow_key *mask)
1068 {
1069         /* key_val::type must be set to ETH_P_PPP_SES
1070          * because ETH_P_PPP_SES was stored in basic.n_proto
1071          * which might get overwritten by ppp_proto
1072          * or might be set to 0, the role of key_val::type
1073          * is similar to vlan_key::tpid
1074          */
1075         key_val->type = htons(ETH_P_PPP_SES);
1076         key_mask->type = cpu_to_be16(~0);
1077
1078         if (tb[TCA_FLOWER_KEY_PPPOE_SID]) {
1079                 key_val->session_id =
1080                         nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]);
1081                 key_mask->session_id = cpu_to_be16(~0);
1082         }
1083         if (tb[TCA_FLOWER_KEY_PPP_PROTO]) {
1084                 key_val->ppp_proto =
1085                         nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]);
1086                 key_mask->ppp_proto = cpu_to_be16(~0);
1087
1088                 if (key_val->ppp_proto == htons(PPP_IP)) {
1089                         key->basic.n_proto = htons(ETH_P_IP);
1090                         mask->basic.n_proto = cpu_to_be16(~0);
1091                 } else if (key_val->ppp_proto == htons(PPP_IPV6)) {
1092                         key->basic.n_proto = htons(ETH_P_IPV6);
1093                         mask->basic.n_proto = cpu_to_be16(~0);
1094                 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) {
1095                         key->basic.n_proto = htons(ETH_P_MPLS_UC);
1096                         mask->basic.n_proto = cpu_to_be16(~0);
1097                 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) {
1098                         key->basic.n_proto = htons(ETH_P_MPLS_MC);
1099                         mask->basic.n_proto = cpu_to_be16(~0);
1100                 }
1101         } else {
1102                 key->basic.n_proto = 0;
1103                 mask->basic.n_proto = cpu_to_be16(0);
1104         }
1105 }
1106
1107 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
1108                             u32 *dissector_key, u32 *dissector_mask,
1109                             u32 flower_flag_bit, u32 dissector_flag_bit)
1110 {
1111         if (flower_mask & flower_flag_bit) {
1112                 *dissector_mask |= dissector_flag_bit;
1113                 if (flower_key & flower_flag_bit)
1114                         *dissector_key |= dissector_flag_bit;
1115         }
1116 }
1117
1118 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key,
1119                             u32 *flags_mask, struct netlink_ext_ack *extack)
1120 {
1121         u32 key, mask;
1122
1123         /* mask is mandatory for flags */
1124         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) {
1125                 NL_SET_ERR_MSG(extack, "Missing flags mask");
1126                 return -EINVAL;
1127         }
1128
1129         key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS]));
1130         mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
1131
1132         *flags_key  = 0;
1133         *flags_mask = 0;
1134
1135         fl_set_key_flag(key, mask, flags_key, flags_mask,
1136                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1137         fl_set_key_flag(key, mask, flags_key, flags_mask,
1138                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1139                         FLOW_DIS_FIRST_FRAG);
1140
1141         return 0;
1142 }
1143
1144 static void fl_set_key_ip(struct nlattr **tb, bool encap,
1145                           struct flow_dissector_key_ip *key,
1146                           struct flow_dissector_key_ip *mask)
1147 {
1148         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1149         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1150         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1151         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1152
1153         fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
1154         fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
1155 }
1156
1157 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
1158                              int depth, int option_len,
1159                              struct netlink_ext_ack *extack)
1160 {
1161         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
1162         struct nlattr *class = NULL, *type = NULL, *data = NULL;
1163         struct geneve_opt *opt;
1164         int err, data_len = 0;
1165
1166         if (option_len > sizeof(struct geneve_opt))
1167                 data_len = option_len - sizeof(struct geneve_opt);
1168
1169         if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4)
1170                 return -ERANGE;
1171
1172         opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
1173         memset(opt, 0xff, option_len);
1174         opt->length = data_len / 4;
1175         opt->r1 = 0;
1176         opt->r2 = 0;
1177         opt->r3 = 0;
1178
1179         /* If no mask has been prodived we assume an exact match. */
1180         if (!depth)
1181                 return sizeof(struct geneve_opt) + data_len;
1182
1183         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
1184                 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
1185                 return -EINVAL;
1186         }
1187
1188         err = nla_parse_nested_deprecated(tb,
1189                                           TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
1190                                           nla, geneve_opt_policy, extack);
1191         if (err < 0)
1192                 return err;
1193
1194         /* We are not allowed to omit any of CLASS, TYPE or DATA
1195          * fields from the key.
1196          */
1197         if (!option_len &&
1198             (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
1199              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
1200              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
1201                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
1202                 return -EINVAL;
1203         }
1204
1205         /* Omitting any of CLASS, TYPE or DATA fields is allowed
1206          * for the mask.
1207          */
1208         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
1209                 int new_len = key->enc_opts.len;
1210
1211                 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
1212                 data_len = nla_len(data);
1213                 if (data_len < 4) {
1214                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
1215                         return -ERANGE;
1216                 }
1217                 if (data_len % 4) {
1218                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
1219                         return -ERANGE;
1220                 }
1221
1222                 new_len += sizeof(struct geneve_opt) + data_len;
1223                 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
1224                 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
1225                         NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
1226                         return -ERANGE;
1227                 }
1228                 opt->length = data_len / 4;
1229                 memcpy(opt->opt_data, nla_data(data), data_len);
1230         }
1231
1232         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
1233                 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
1234                 opt->opt_class = nla_get_be16(class);
1235         }
1236
1237         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
1238                 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
1239                 opt->type = nla_get_u8(type);
1240         }
1241
1242         return sizeof(struct geneve_opt) + data_len;
1243 }
1244
1245 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1246                             int depth, int option_len,
1247                             struct netlink_ext_ack *extack)
1248 {
1249         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1];
1250         struct vxlan_metadata *md;
1251         int err;
1252
1253         md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1254         memset(md, 0xff, sizeof(*md));
1255
1256         if (!depth)
1257                 return sizeof(*md);
1258
1259         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) {
1260                 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask");
1261                 return -EINVAL;
1262         }
1263
1264         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla,
1265                                vxlan_opt_policy, extack);
1266         if (err < 0)
1267                 return err;
1268
1269         if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1270                 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
1271                 return -EINVAL;
1272         }
1273
1274         if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1275                 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]);
1276                 md->gbp &= VXLAN_GBP_MASK;
1277         }
1278
1279         return sizeof(*md);
1280 }
1281
1282 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1283                              int depth, int option_len,
1284                              struct netlink_ext_ack *extack)
1285 {
1286         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1];
1287         struct erspan_metadata *md;
1288         int err;
1289
1290         md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1291         memset(md, 0xff, sizeof(*md));
1292         md->version = 1;
1293
1294         if (!depth)
1295                 return sizeof(*md);
1296
1297         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) {
1298                 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask");
1299                 return -EINVAL;
1300         }
1301
1302         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla,
1303                                erspan_opt_policy, extack);
1304         if (err < 0)
1305                 return err;
1306
1307         if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) {
1308                 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
1309                 return -EINVAL;
1310         }
1311
1312         if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER])
1313                 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]);
1314
1315         if (md->version == 1) {
1316                 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1317                         NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
1318                         return -EINVAL;
1319                 }
1320                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1321                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
1322                         memset(&md->u, 0x00, sizeof(md->u));
1323                         md->u.index = nla_get_be32(nla);
1324                 }
1325         } else if (md->version == 2) {
1326                 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] ||
1327                                     !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) {
1328                         NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
1329                         return -EINVAL;
1330                 }
1331                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) {
1332                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR];
1333                         md->u.md2.dir = nla_get_u8(nla);
1334                 }
1335                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) {
1336                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID];
1337                         set_hwid(&md->u.md2, nla_get_u8(nla));
1338                 }
1339         } else {
1340                 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
1341                 return -EINVAL;
1342         }
1343
1344         return sizeof(*md);
1345 }
1346
1347 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key,
1348                           int depth, int option_len,
1349                           struct netlink_ext_ack *extack)
1350 {
1351         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1];
1352         struct gtp_pdu_session_info *sinfo;
1353         u8 len = key->enc_opts.len;
1354         int err;
1355
1356         sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len];
1357         memset(sinfo, 0xff, option_len);
1358
1359         if (!depth)
1360                 return sizeof(*sinfo);
1361
1362         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) {
1363                 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask");
1364                 return -EINVAL;
1365         }
1366
1367         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla,
1368                                gtp_opt_policy, extack);
1369         if (err < 0)
1370                 return err;
1371
1372         if (!option_len &&
1373             (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] ||
1374              !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) {
1375                 NL_SET_ERR_MSG_MOD(extack,
1376                                    "Missing tunnel key gtp option pdu type or qfi");
1377                 return -EINVAL;
1378         }
1379
1380         if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE])
1381                 sinfo->pdu_type =
1382                         nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]);
1383
1384         if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])
1385                 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]);
1386
1387         return sizeof(*sinfo);
1388 }
1389
1390 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
1391                           struct fl_flow_key *mask,
1392                           struct netlink_ext_ack *extack)
1393 {
1394         const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
1395         int err, option_len, key_depth, msk_depth = 0;
1396
1397         err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
1398                                              TCA_FLOWER_KEY_ENC_OPTS_MAX,
1399                                              enc_opts_policy, extack);
1400         if (err)
1401                 return err;
1402
1403         nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
1404
1405         if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
1406                 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
1407                                                      TCA_FLOWER_KEY_ENC_OPTS_MAX,
1408                                                      enc_opts_policy, extack);
1409                 if (err)
1410                         return err;
1411
1412                 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1413                 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1414                 if (!nla_ok(nla_opt_msk, msk_depth)) {
1415                         NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks");
1416                         return -EINVAL;
1417                 }
1418         }
1419
1420         nla_for_each_attr(nla_opt_key, nla_enc_key,
1421                           nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
1422                 switch (nla_type(nla_opt_key)) {
1423                 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
1424                         if (key->enc_opts.dst_opt_type &&
1425                             key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) {
1426                                 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
1427                                 return -EINVAL;
1428                         }
1429                         option_len = 0;
1430                         key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1431                         option_len = fl_set_geneve_opt(nla_opt_key, key,
1432                                                        key_depth, option_len,
1433                                                        extack);
1434                         if (option_len < 0)
1435                                 return option_len;
1436
1437                         key->enc_opts.len += option_len;
1438                         /* At the same time we need to parse through the mask
1439                          * in order to verify exact and mask attribute lengths.
1440                          */
1441                         mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1442                         option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1443                                                        msk_depth, option_len,
1444                                                        extack);
1445                         if (option_len < 0)
1446                                 return option_len;
1447
1448                         mask->enc_opts.len += option_len;
1449                         if (key->enc_opts.len != mask->enc_opts.len) {
1450                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1451                                 return -EINVAL;
1452                         }
1453                         break;
1454                 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN:
1455                         if (key->enc_opts.dst_opt_type) {
1456                                 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
1457                                 return -EINVAL;
1458                         }
1459                         option_len = 0;
1460                         key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1461                         option_len = fl_set_vxlan_opt(nla_opt_key, key,
1462                                                       key_depth, option_len,
1463                                                       extack);
1464                         if (option_len < 0)
1465                                 return option_len;
1466
1467                         key->enc_opts.len += option_len;
1468                         /* At the same time we need to parse through the mask
1469                          * in order to verify exact and mask attribute lengths.
1470                          */
1471                         mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1472                         option_len = fl_set_vxlan_opt(nla_opt_msk, mask,
1473                                                       msk_depth, option_len,
1474                                                       extack);
1475                         if (option_len < 0)
1476                                 return option_len;
1477
1478                         mask->enc_opts.len += option_len;
1479                         if (key->enc_opts.len != mask->enc_opts.len) {
1480                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1481                                 return -EINVAL;
1482                         }
1483                         break;
1484                 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN:
1485                         if (key->enc_opts.dst_opt_type) {
1486                                 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
1487                                 return -EINVAL;
1488                         }
1489                         option_len = 0;
1490                         key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1491                         option_len = fl_set_erspan_opt(nla_opt_key, key,
1492                                                        key_depth, option_len,
1493                                                        extack);
1494                         if (option_len < 0)
1495                                 return option_len;
1496
1497                         key->enc_opts.len += option_len;
1498                         /* At the same time we need to parse through the mask
1499                          * in order to verify exact and mask attribute lengths.
1500                          */
1501                         mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1502                         option_len = fl_set_erspan_opt(nla_opt_msk, mask,
1503                                                        msk_depth, option_len,
1504                                                        extack);
1505                         if (option_len < 0)
1506                                 return option_len;
1507
1508                         mask->enc_opts.len += option_len;
1509                         if (key->enc_opts.len != mask->enc_opts.len) {
1510                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1511                                 return -EINVAL;
1512                         }
1513                         break;
1514                 case TCA_FLOWER_KEY_ENC_OPTS_GTP:
1515                         if (key->enc_opts.dst_opt_type) {
1516                                 NL_SET_ERR_MSG_MOD(extack,
1517                                                    "Duplicate type for gtp options");
1518                                 return -EINVAL;
1519                         }
1520                         option_len = 0;
1521                         key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
1522                         option_len = fl_set_gtp_opt(nla_opt_key, key,
1523                                                     key_depth, option_len,
1524                                                     extack);
1525                         if (option_len < 0)
1526                                 return option_len;
1527
1528                         key->enc_opts.len += option_len;
1529                         /* At the same time we need to parse through the mask
1530                          * in order to verify exact and mask attribute lengths.
1531                          */
1532                         mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
1533                         option_len = fl_set_gtp_opt(nla_opt_msk, mask,
1534                                                     msk_depth, option_len,
1535                                                     extack);
1536                         if (option_len < 0)
1537                                 return option_len;
1538
1539                         mask->enc_opts.len += option_len;
1540                         if (key->enc_opts.len != mask->enc_opts.len) {
1541                                 NL_SET_ERR_MSG_MOD(extack,
1542                                                    "Key and mask miss aligned");
1543                                 return -EINVAL;
1544                         }
1545                         break;
1546                 default:
1547                         NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1548                         return -EINVAL;
1549                 }
1550
1551                 if (!msk_depth)
1552                         continue;
1553
1554                 if (!nla_ok(nla_opt_msk, msk_depth)) {
1555                         NL_SET_ERR_MSG(extack, "A mask attribute is invalid");
1556                         return -EINVAL;
1557                 }
1558                 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1559         }
1560
1561         return 0;
1562 }
1563
1564 static int fl_validate_ct_state(u16 state, struct nlattr *tb,
1565                                 struct netlink_ext_ack *extack)
1566 {
1567         if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) {
1568                 NL_SET_ERR_MSG_ATTR(extack, tb,
1569                                     "no trk, so no other flag can be set");
1570                 return -EINVAL;
1571         }
1572
1573         if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1574             state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
1575                 NL_SET_ERR_MSG_ATTR(extack, tb,
1576                                     "new and est are mutually exclusive");
1577                 return -EINVAL;
1578         }
1579
1580         if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID &&
1581             state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
1582                       TCA_FLOWER_KEY_CT_FLAGS_INVALID)) {
1583                 NL_SET_ERR_MSG_ATTR(extack, tb,
1584                                     "when inv is set, only trk may be set");
1585                 return -EINVAL;
1586         }
1587
1588         if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1589             state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) {
1590                 NL_SET_ERR_MSG_ATTR(extack, tb,
1591                                     "new and rpl are mutually exclusive");
1592                 return -EINVAL;
1593         }
1594
1595         return 0;
1596 }
1597
1598 static int fl_set_key_ct(struct nlattr **tb,
1599                          struct flow_dissector_key_ct *key,
1600                          struct flow_dissector_key_ct *mask,
1601                          struct netlink_ext_ack *extack)
1602 {
1603         if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1604                 int err;
1605
1606                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1607                         NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1608                         return -EOPNOTSUPP;
1609                 }
1610                 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1611                                &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1612                                sizeof(key->ct_state));
1613
1614                 err = fl_validate_ct_state(key->ct_state & mask->ct_state,
1615                                            tb[TCA_FLOWER_KEY_CT_STATE_MASK],
1616                                            extack);
1617                 if (err)
1618                         return err;
1619
1620         }
1621         if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1622                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1623                         NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1624                         return -EOPNOTSUPP;
1625                 }
1626                 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1627                                &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1628                                sizeof(key->ct_zone));
1629         }
1630         if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1631                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1632                         NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1633                         return -EOPNOTSUPP;
1634                 }
1635                 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1636                                &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1637                                sizeof(key->ct_mark));
1638         }
1639         if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1640                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1641                         NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1642                         return -EOPNOTSUPP;
1643                 }
1644                 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1645                                mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1646                                sizeof(key->ct_labels));
1647         }
1648
1649         return 0;
1650 }
1651
1652 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype,
1653                         struct fl_flow_key *key, struct fl_flow_key *mask,
1654                         int vthresh)
1655 {
1656         const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh;
1657
1658         if (!tb) {
1659                 *ethertype = 0;
1660                 return good_num_of_vlans;
1661         }
1662
1663         *ethertype = nla_get_be16(tb);
1664         if (good_num_of_vlans || eth_type_vlan(*ethertype))
1665                 return true;
1666
1667         key->basic.n_proto = *ethertype;
1668         mask->basic.n_proto = cpu_to_be16(~0);
1669         return false;
1670 }
1671
1672 static void fl_set_key_cfm_md_level(struct nlattr **tb,
1673                                     struct fl_flow_key *key,
1674                                     struct fl_flow_key *mask,
1675                                     struct netlink_ext_ack *extack)
1676 {
1677         u8 level;
1678
1679         if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL])
1680                 return;
1681
1682         level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]);
1683         key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level);
1684         mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK;
1685 }
1686
1687 static void fl_set_key_cfm_opcode(struct nlattr **tb,
1688                                   struct fl_flow_key *key,
1689                                   struct fl_flow_key *mask,
1690                                   struct netlink_ext_ack *extack)
1691 {
1692         fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE,
1693                        &mask->cfm.opcode, TCA_FLOWER_UNSPEC,
1694                        sizeof(key->cfm.opcode));
1695 }
1696
1697 static int fl_set_key_cfm(struct nlattr **tb,
1698                           struct fl_flow_key *key,
1699                           struct fl_flow_key *mask,
1700                           struct netlink_ext_ack *extack)
1701 {
1702         struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX];
1703         int err;
1704
1705         if (!tb[TCA_FLOWER_KEY_CFM])
1706                 return 0;
1707
1708         err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX,
1709                                tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack);
1710         if (err < 0)
1711                 return err;
1712
1713         fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack);
1714         fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack);
1715
1716         return 0;
1717 }
1718
1719 static int fl_set_key(struct net *net, struct nlattr **tb,
1720                       struct fl_flow_key *key, struct fl_flow_key *mask,
1721                       struct netlink_ext_ack *extack)
1722 {
1723         __be16 ethertype;
1724         int ret = 0;
1725
1726         if (tb[TCA_FLOWER_INDEV]) {
1727                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1728                 if (err < 0)
1729                         return err;
1730                 key->meta.ingress_ifindex = err;
1731                 mask->meta.ingress_ifindex = 0xffffffff;
1732         }
1733
1734         fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS,
1735                        &mask->meta.l2_miss, TCA_FLOWER_UNSPEC,
1736                        sizeof(key->meta.l2_miss));
1737
1738         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1739                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1740                        sizeof(key->eth.dst));
1741         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1742                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1743                        sizeof(key->eth.src));
1744         fl_set_key_val(tb, &key->num_of_vlans,
1745                        TCA_FLOWER_KEY_NUM_OF_VLANS,
1746                        &mask->num_of_vlans,
1747                        TCA_FLOWER_UNSPEC,
1748                        sizeof(key->num_of_vlans));
1749
1750         if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], &ethertype, key, mask, 0)) {
1751                 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1752                                 TCA_FLOWER_KEY_VLAN_PRIO,
1753                                 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1754                                 &key->vlan, &mask->vlan);
1755
1756                 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE],
1757                                 &ethertype, key, mask, 1)) {
1758                         fl_set_key_vlan(tb, ethertype,
1759                                         TCA_FLOWER_KEY_CVLAN_ID,
1760                                         TCA_FLOWER_KEY_CVLAN_PRIO,
1761                                         TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1762                                         &key->cvlan, &mask->cvlan);
1763                         fl_set_key_val(tb, &key->basic.n_proto,
1764                                        TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1765                                        &mask->basic.n_proto,
1766                                        TCA_FLOWER_UNSPEC,
1767                                        sizeof(key->basic.n_proto));
1768                 }
1769         }
1770
1771         if (key->basic.n_proto == htons(ETH_P_PPP_SES))
1772                 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask);
1773
1774         if (key->basic.n_proto == htons(ETH_P_IP) ||
1775             key->basic.n_proto == htons(ETH_P_IPV6)) {
1776                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1777                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1778                                sizeof(key->basic.ip_proto));
1779                 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1780         }
1781
1782         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1783                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1784                 mask->control.addr_type = ~0;
1785                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1786                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1787                                sizeof(key->ipv4.src));
1788                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1789                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1790                                sizeof(key->ipv4.dst));
1791         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1792                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1793                 mask->control.addr_type = ~0;
1794                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1795                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1796                                sizeof(key->ipv6.src));
1797                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1798                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1799                                sizeof(key->ipv6.dst));
1800         }
1801
1802         if (key->basic.ip_proto == IPPROTO_TCP) {
1803                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1804                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1805                                sizeof(key->tp.src));
1806                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1807                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1808                                sizeof(key->tp.dst));
1809                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1810                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1811                                sizeof(key->tcp.flags));
1812         } else if (key->basic.ip_proto == IPPROTO_UDP) {
1813                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1814                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1815                                sizeof(key->tp.src));
1816                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1817                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1818                                sizeof(key->tp.dst));
1819         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1820                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1821                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1822                                sizeof(key->tp.src));
1823                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1824                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1825                                sizeof(key->tp.dst));
1826         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1827                    key->basic.ip_proto == IPPROTO_ICMP) {
1828                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1829                                &mask->icmp.type,
1830                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1831                                sizeof(key->icmp.type));
1832                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1833                                &mask->icmp.code,
1834                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1835                                sizeof(key->icmp.code));
1836         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1837                    key->basic.ip_proto == IPPROTO_ICMPV6) {
1838                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1839                                &mask->icmp.type,
1840                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1841                                sizeof(key->icmp.type));
1842                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1843                                &mask->icmp.code,
1844                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1845                                sizeof(key->icmp.code));
1846         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1847                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1848                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack);
1849                 if (ret)
1850                         return ret;
1851         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1852                    key->basic.n_proto == htons(ETH_P_RARP)) {
1853                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1854                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1855                                sizeof(key->arp.sip));
1856                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1857                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1858                                sizeof(key->arp.tip));
1859                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1860                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1861                                sizeof(key->arp.op));
1862                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1863                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1864                                sizeof(key->arp.sha));
1865                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1866                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1867                                sizeof(key->arp.tha));
1868         } else if (key->basic.ip_proto == IPPROTO_L2TP) {
1869                 fl_set_key_val(tb, &key->l2tpv3.session_id,
1870                                TCA_FLOWER_KEY_L2TPV3_SID,
1871                                &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC,
1872                                sizeof(key->l2tpv3.session_id));
1873         } else if (key->basic.n_proto  == htons(ETH_P_CFM)) {
1874                 ret = fl_set_key_cfm(tb, key, mask, extack);
1875                 if (ret)
1876                         return ret;
1877         }
1878
1879         if (key->basic.ip_proto == IPPROTO_TCP ||
1880             key->basic.ip_proto == IPPROTO_UDP ||
1881             key->basic.ip_proto == IPPROTO_SCTP) {
1882                 ret = fl_set_key_port_range(tb, key, mask, extack);
1883                 if (ret)
1884                         return ret;
1885         }
1886
1887         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1888             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1889                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1890                 mask->enc_control.addr_type = ~0;
1891                 fl_set_key_val(tb, &key->enc_ipv4.src,
1892                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
1893                                &mask->enc_ipv4.src,
1894                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1895                                sizeof(key->enc_ipv4.src));
1896                 fl_set_key_val(tb, &key->enc_ipv4.dst,
1897                                TCA_FLOWER_KEY_ENC_IPV4_DST,
1898                                &mask->enc_ipv4.dst,
1899                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1900                                sizeof(key->enc_ipv4.dst));
1901         }
1902
1903         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1904             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1905                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1906                 mask->enc_control.addr_type = ~0;
1907                 fl_set_key_val(tb, &key->enc_ipv6.src,
1908                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
1909                                &mask->enc_ipv6.src,
1910                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1911                                sizeof(key->enc_ipv6.src));
1912                 fl_set_key_val(tb, &key->enc_ipv6.dst,
1913                                TCA_FLOWER_KEY_ENC_IPV6_DST,
1914                                &mask->enc_ipv6.dst,
1915                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1916                                sizeof(key->enc_ipv6.dst));
1917         }
1918
1919         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1920                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1921                        sizeof(key->enc_key_id.keyid));
1922
1923         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1924                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1925                        sizeof(key->enc_tp.src));
1926
1927         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1928                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1929                        sizeof(key->enc_tp.dst));
1930
1931         fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1932
1933         fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
1934                        &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
1935                        sizeof(key->hash.hash));
1936
1937         if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1938                 ret = fl_set_enc_opt(tb, key, mask, extack);
1939                 if (ret)
1940                         return ret;
1941         }
1942
1943         ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1944         if (ret)
1945                 return ret;
1946
1947         if (tb[TCA_FLOWER_KEY_FLAGS])
1948                 ret = fl_set_key_flags(tb, &key->control.flags,
1949                                        &mask->control.flags, extack);
1950
1951         return ret;
1952 }
1953
1954 static void fl_mask_copy(struct fl_flow_mask *dst,
1955                          struct fl_flow_mask *src)
1956 {
1957         const void *psrc = fl_key_get_start(&src->key, src);
1958         void *pdst = fl_key_get_start(&dst->key, src);
1959
1960         memcpy(pdst, psrc, fl_mask_range(src));
1961         dst->range = src->range;
1962 }
1963
1964 static const struct rhashtable_params fl_ht_params = {
1965         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1966         .head_offset = offsetof(struct cls_fl_filter, ht_node),
1967         .automatic_shrinking = true,
1968 };
1969
1970 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1971 {
1972         mask->filter_ht_params = fl_ht_params;
1973         mask->filter_ht_params.key_len = fl_mask_range(mask);
1974         mask->filter_ht_params.key_offset += mask->range.start;
1975
1976         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1977 }
1978
1979 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1980 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member)
1981
1982 #define FL_KEY_IS_MASKED(mask, member)                                          \
1983         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
1984                    0, FL_KEY_MEMBER_SIZE(member))                               \
1985
1986 #define FL_KEY_SET(keys, cnt, id, member)                                       \
1987         do {                                                                    \
1988                 keys[cnt].key_id = id;                                          \
1989                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
1990                 cnt++;                                                          \
1991         } while(0);
1992
1993 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
1994         do {                                                                    \
1995                 if (FL_KEY_IS_MASKED(mask, member))                             \
1996                         FL_KEY_SET(keys, cnt, id, member);                      \
1997         } while(0);
1998
1999 static void fl_init_dissector(struct flow_dissector *dissector,
2000                               struct fl_flow_key *mask)
2001 {
2002         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
2003         size_t cnt = 0;
2004
2005         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2006                              FLOW_DISSECTOR_KEY_META, meta);
2007         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
2008         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
2009         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2010                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
2011         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2012                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
2013         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2014                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
2015         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2016                              FLOW_DISSECTOR_KEY_PORTS, tp);
2017         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2018                              FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
2019         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2020                              FLOW_DISSECTOR_KEY_IP, ip);
2021         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2022                              FLOW_DISSECTOR_KEY_TCP, tcp);
2023         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2024                              FLOW_DISSECTOR_KEY_ICMP, icmp);
2025         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2026                              FLOW_DISSECTOR_KEY_ARP, arp);
2027         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2028                              FLOW_DISSECTOR_KEY_MPLS, mpls);
2029         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2030                              FLOW_DISSECTOR_KEY_VLAN, vlan);
2031         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2032                              FLOW_DISSECTOR_KEY_CVLAN, cvlan);
2033         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2034                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
2035         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2036                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
2037         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2038                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
2039         if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
2040             FL_KEY_IS_MASKED(mask, enc_ipv6))
2041                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
2042                            enc_control);
2043         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2044                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
2045         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2046                              FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
2047         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2048                              FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
2049         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2050                              FLOW_DISSECTOR_KEY_CT, ct);
2051         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2052                              FLOW_DISSECTOR_KEY_HASH, hash);
2053         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2054                              FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans);
2055         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2056                              FLOW_DISSECTOR_KEY_PPPOE, pppoe);
2057         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2058                              FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3);
2059         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2060                              FLOW_DISSECTOR_KEY_CFM, cfm);
2061
2062         skb_flow_dissector_init(dissector, keys, cnt);
2063 }
2064
2065 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
2066                                                struct fl_flow_mask *mask)
2067 {
2068         struct fl_flow_mask *newmask;
2069         int err;
2070
2071         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
2072         if (!newmask)
2073                 return ERR_PTR(-ENOMEM);
2074
2075         fl_mask_copy(newmask, mask);
2076
2077         if ((newmask->key.tp_range.tp_min.dst &&
2078              newmask->key.tp_range.tp_max.dst) ||
2079             (newmask->key.tp_range.tp_min.src &&
2080              newmask->key.tp_range.tp_max.src))
2081                 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
2082
2083         err = fl_init_mask_hashtable(newmask);
2084         if (err)
2085                 goto errout_free;
2086
2087         fl_init_dissector(&newmask->dissector, &newmask->key);
2088
2089         INIT_LIST_HEAD_RCU(&newmask->filters);
2090
2091         refcount_set(&newmask->refcnt, 1);
2092         err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
2093                                       &newmask->ht_node, mask_ht_params);
2094         if (err)
2095                 goto errout_destroy;
2096
2097         spin_lock(&head->masks_lock);
2098         list_add_tail_rcu(&newmask->list, &head->masks);
2099         spin_unlock(&head->masks_lock);
2100
2101         return newmask;
2102
2103 errout_destroy:
2104         rhashtable_destroy(&newmask->ht);
2105 errout_free:
2106         kfree(newmask);
2107
2108         return ERR_PTR(err);
2109 }
2110
2111 static int fl_check_assign_mask(struct cls_fl_head *head,
2112                                 struct cls_fl_filter *fnew,
2113                                 struct cls_fl_filter *fold,
2114                                 struct fl_flow_mask *mask)
2115 {
2116         struct fl_flow_mask *newmask;
2117         int ret = 0;
2118
2119         rcu_read_lock();
2120
2121         /* Insert mask as temporary node to prevent concurrent creation of mask
2122          * with same key. Any concurrent lookups with same key will return
2123          * -EAGAIN because mask's refcnt is zero.
2124          */
2125         fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
2126                                                        &mask->ht_node,
2127                                                        mask_ht_params);
2128         if (!fnew->mask) {
2129                 rcu_read_unlock();
2130
2131                 if (fold) {
2132                         ret = -EINVAL;
2133                         goto errout_cleanup;
2134                 }
2135
2136                 newmask = fl_create_new_mask(head, mask);
2137                 if (IS_ERR(newmask)) {
2138                         ret = PTR_ERR(newmask);
2139                         goto errout_cleanup;
2140                 }
2141
2142                 fnew->mask = newmask;
2143                 return 0;
2144         } else if (IS_ERR(fnew->mask)) {
2145                 ret = PTR_ERR(fnew->mask);
2146         } else if (fold && fold->mask != fnew->mask) {
2147                 ret = -EINVAL;
2148         } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
2149                 /* Mask was deleted concurrently, try again */
2150                 ret = -EAGAIN;
2151         }
2152         rcu_read_unlock();
2153         return ret;
2154
2155 errout_cleanup:
2156         rhashtable_remove_fast(&head->ht, &mask->ht_node,
2157                                mask_ht_params);
2158         return ret;
2159 }
2160
2161 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask)
2162 {
2163         return mask->meta.l2_miss;
2164 }
2165
2166 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
2167                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
2168                         unsigned long base, struct nlattr **tb,
2169                         struct nlattr *est,
2170                         struct fl_flow_tmplt *tmplt,
2171                         u32 flags, u32 fl_flags,
2172                         struct netlink_ext_ack *extack)
2173 {
2174         int err;
2175
2176         err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags,
2177                                    fl_flags, extack);
2178         if (err < 0)
2179                 return err;
2180
2181         if (tb[TCA_FLOWER_CLASSID]) {
2182                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
2183                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2184                         rtnl_lock();
2185                 tcf_bind_filter(tp, &f->res, base);
2186                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2187                         rtnl_unlock();
2188         }
2189
2190         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
2191         if (err)
2192                 return err;
2193
2194         fl_mask_update_range(mask);
2195         fl_set_masked_key(&f->mkey, &f->key, mask);
2196
2197         if (!fl_mask_fits_tmplt(tmplt, mask)) {
2198                 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
2199                 return -EINVAL;
2200         }
2201
2202         /* Enable tc skb extension if filter matches on data extracted from
2203          * this extension.
2204          */
2205         if (fl_needs_tc_skb_ext(&mask->key)) {
2206                 f->needs_tc_skb_ext = 1;
2207                 tc_skb_ext_tc_enable();
2208         }
2209
2210         return 0;
2211 }
2212
2213 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
2214                                struct cls_fl_filter *fold,
2215                                bool *in_ht)
2216 {
2217         struct fl_flow_mask *mask = fnew->mask;
2218         int err;
2219
2220         err = rhashtable_lookup_insert_fast(&mask->ht,
2221                                             &fnew->ht_node,
2222                                             mask->filter_ht_params);
2223         if (err) {
2224                 *in_ht = false;
2225                 /* It is okay if filter with same key exists when
2226                  * overwriting.
2227                  */
2228                 return fold && err == -EEXIST ? 0 : err;
2229         }
2230
2231         *in_ht = true;
2232         return 0;
2233 }
2234
2235 static int fl_change(struct net *net, struct sk_buff *in_skb,
2236                      struct tcf_proto *tp, unsigned long base,
2237                      u32 handle, struct nlattr **tca,
2238                      void **arg, u32 flags,
2239                      struct netlink_ext_ack *extack)
2240 {
2241         struct cls_fl_head *head = fl_head_dereference(tp);
2242         bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL);
2243         struct cls_fl_filter *fold = *arg;
2244         struct cls_fl_filter *fnew;
2245         struct fl_flow_mask *mask;
2246         struct nlattr **tb;
2247         bool in_ht;
2248         int err;
2249
2250         if (!tca[TCA_OPTIONS]) {
2251                 err = -EINVAL;
2252                 goto errout_fold;
2253         }
2254
2255         mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
2256         if (!mask) {
2257                 err = -ENOBUFS;
2258                 goto errout_fold;
2259         }
2260
2261         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2262         if (!tb) {
2263                 err = -ENOBUFS;
2264                 goto errout_mask_alloc;
2265         }
2266
2267         err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2268                                           tca[TCA_OPTIONS], fl_policy, NULL);
2269         if (err < 0)
2270                 goto errout_tb;
2271
2272         if (fold && handle && fold->handle != handle) {
2273                 err = -EINVAL;
2274                 goto errout_tb;
2275         }
2276
2277         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
2278         if (!fnew) {
2279                 err = -ENOBUFS;
2280                 goto errout_tb;
2281         }
2282         INIT_LIST_HEAD(&fnew->hw_list);
2283         refcount_set(&fnew->refcnt, 1);
2284
2285         if (tb[TCA_FLOWER_FLAGS]) {
2286                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
2287
2288                 if (!tc_flags_valid(fnew->flags)) {
2289                         kfree(fnew);
2290                         err = -EINVAL;
2291                         goto errout_tb;
2292                 }
2293         }
2294
2295         if (!fold) {
2296                 spin_lock(&tp->lock);
2297                 if (!handle) {
2298                         handle = 1;
2299                         err = idr_alloc_u32(&head->handle_idr, NULL, &handle,
2300                                             INT_MAX, GFP_ATOMIC);
2301                 } else {
2302                         err = idr_alloc_u32(&head->handle_idr, NULL, &handle,
2303                                             handle, GFP_ATOMIC);
2304
2305                         /* Filter with specified handle was concurrently
2306                          * inserted after initial check in cls_api. This is not
2307                          * necessarily an error if NLM_F_EXCL is not set in
2308                          * message flags. Returning EAGAIN will cause cls_api to
2309                          * try to update concurrently inserted rule.
2310                          */
2311                         if (err == -ENOSPC)
2312                                 err = -EAGAIN;
2313                 }
2314                 spin_unlock(&tp->lock);
2315
2316                 if (err) {
2317                         kfree(fnew);
2318                         goto errout_tb;
2319                 }
2320         }
2321         fnew->handle = handle;
2322
2323         err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle,
2324                                !tc_skip_hw(fnew->flags));
2325         if (err < 0)
2326                 goto errout_idr;
2327
2328         err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE],
2329                            tp->chain->tmplt_priv, flags, fnew->flags,
2330                            extack);
2331         if (err)
2332                 goto errout_idr;
2333
2334         err = fl_check_assign_mask(head, fnew, fold, mask);
2335         if (err)
2336                 goto errout_idr;
2337
2338         err = fl_ht_insert_unique(fnew, fold, &in_ht);
2339         if (err)
2340                 goto errout_mask;
2341
2342         if (!tc_skip_hw(fnew->flags)) {
2343                 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
2344                 if (err)
2345                         goto errout_ht;
2346         }
2347
2348         if (!tc_in_hw(fnew->flags))
2349                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
2350
2351         spin_lock(&tp->lock);
2352
2353         /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
2354          * proto again or create new one, if necessary.
2355          */
2356         if (tp->deleting) {
2357                 err = -EAGAIN;
2358                 goto errout_hw;
2359         }
2360
2361         if (fold) {
2362                 /* Fold filter was deleted concurrently. Retry lookup. */
2363                 if (fold->deleted) {
2364                         err = -EAGAIN;
2365                         goto errout_hw;
2366                 }
2367
2368                 fnew->handle = handle;
2369
2370                 if (!in_ht) {
2371                         struct rhashtable_params params =
2372                                 fnew->mask->filter_ht_params;
2373
2374                         err = rhashtable_insert_fast(&fnew->mask->ht,
2375                                                      &fnew->ht_node,
2376                                                      params);
2377                         if (err)
2378                                 goto errout_hw;
2379                         in_ht = true;
2380                 }
2381
2382                 refcount_inc(&fnew->refcnt);
2383                 rhashtable_remove_fast(&fold->mask->ht,
2384                                        &fold->ht_node,
2385                                        fold->mask->filter_ht_params);
2386                 idr_replace(&head->handle_idr, fnew, fnew->handle);
2387                 list_replace_rcu(&fold->list, &fnew->list);
2388                 fold->deleted = true;
2389
2390                 spin_unlock(&tp->lock);
2391
2392                 fl_mask_put(head, fold->mask);
2393                 if (!tc_skip_hw(fold->flags))
2394                         fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
2395                 tcf_unbind_filter(tp, &fold->res);
2396                 /* Caller holds reference to fold, so refcnt is always > 0
2397                  * after this.
2398                  */
2399                 refcount_dec(&fold->refcnt);
2400                 __fl_put(fold);
2401         } else {
2402                 idr_replace(&head->handle_idr, fnew, fnew->handle);
2403
2404                 refcount_inc(&fnew->refcnt);
2405                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
2406                 spin_unlock(&tp->lock);
2407         }
2408
2409         *arg = fnew;
2410
2411         kfree(tb);
2412         tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2413         return 0;
2414
2415 errout_ht:
2416         spin_lock(&tp->lock);
2417 errout_hw:
2418         fnew->deleted = true;
2419         spin_unlock(&tp->lock);
2420         if (!tc_skip_hw(fnew->flags))
2421                 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
2422         if (in_ht)
2423                 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
2424                                        fnew->mask->filter_ht_params);
2425 errout_mask:
2426         fl_mask_put(head, fnew->mask);
2427 errout_idr:
2428         if (!fold)
2429                 idr_remove(&head->handle_idr, fnew->handle);
2430         __fl_put(fnew);
2431 errout_tb:
2432         kfree(tb);
2433 errout_mask_alloc:
2434         tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2435 errout_fold:
2436         if (fold)
2437                 __fl_put(fold);
2438         return err;
2439 }
2440
2441 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
2442                      bool rtnl_held, struct netlink_ext_ack *extack)
2443 {
2444         struct cls_fl_head *head = fl_head_dereference(tp);
2445         struct cls_fl_filter *f = arg;
2446         bool last_on_mask;
2447         int err = 0;
2448
2449         err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
2450         *last = list_empty(&head->masks);
2451         __fl_put(f);
2452
2453         return err;
2454 }
2455
2456 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
2457                     bool rtnl_held)
2458 {
2459         struct cls_fl_head *head = fl_head_dereference(tp);
2460         unsigned long id = arg->cookie, tmp;
2461         struct cls_fl_filter *f;
2462
2463         arg->count = arg->skip;
2464
2465         rcu_read_lock();
2466         idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
2467                 /* don't return filters that are being deleted */
2468                 if (!f || !refcount_inc_not_zero(&f->refcnt))
2469                         continue;
2470                 rcu_read_unlock();
2471
2472                 if (arg->fn(tp, f, arg) < 0) {
2473                         __fl_put(f);
2474                         arg->stop = 1;
2475                         rcu_read_lock();
2476                         break;
2477                 }
2478                 __fl_put(f);
2479                 arg->count++;
2480                 rcu_read_lock();
2481         }
2482         rcu_read_unlock();
2483         arg->cookie = id;
2484 }
2485
2486 static struct cls_fl_filter *
2487 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
2488 {
2489         struct cls_fl_head *head = fl_head_dereference(tp);
2490
2491         spin_lock(&tp->lock);
2492         if (list_empty(&head->hw_filters)) {
2493                 spin_unlock(&tp->lock);
2494                 return NULL;
2495         }
2496
2497         if (!f)
2498                 f = list_entry(&head->hw_filters, struct cls_fl_filter,
2499                                hw_list);
2500         list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
2501                 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
2502                         spin_unlock(&tp->lock);
2503                         return f;
2504                 }
2505         }
2506
2507         spin_unlock(&tp->lock);
2508         return NULL;
2509 }
2510
2511 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
2512                         void *cb_priv, struct netlink_ext_ack *extack)
2513 {
2514         struct tcf_block *block = tp->chain->block;
2515         struct flow_cls_offload cls_flower = {};
2516         struct cls_fl_filter *f = NULL;
2517         int err;
2518
2519         /* hw_filters list can only be changed by hw offload functions after
2520          * obtaining rtnl lock. Make sure it is not changed while reoffload is
2521          * iterating it.
2522          */
2523         ASSERT_RTNL();
2524
2525         while ((f = fl_get_next_hw_filter(tp, f, add))) {
2526                 cls_flower.rule =
2527                         flow_rule_alloc(tcf_exts_num_actions(&f->exts));
2528                 if (!cls_flower.rule) {
2529                         __fl_put(f);
2530                         return -ENOMEM;
2531                 }
2532
2533                 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
2534                                            extack);
2535                 cls_flower.command = add ?
2536                         FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
2537                 cls_flower.cookie = (unsigned long)f;
2538                 cls_flower.rule->match.dissector = &f->mask->dissector;
2539                 cls_flower.rule->match.mask = &f->mask->key;
2540                 cls_flower.rule->match.key = &f->mkey;
2541
2542                 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts,
2543                                               cls_flower.common.extack);
2544                 if (err) {
2545                         kfree(cls_flower.rule);
2546                         if (tc_skip_sw(f->flags)) {
2547                                 __fl_put(f);
2548                                 return err;
2549                         }
2550                         goto next_flow;
2551                 }
2552
2553                 cls_flower.classid = f->res.classid;
2554
2555                 err = tc_setup_cb_reoffload(block, tp, add, cb,
2556                                             TC_SETUP_CLSFLOWER, &cls_flower,
2557                                             cb_priv, &f->flags,
2558                                             &f->in_hw_count);
2559                 tc_cleanup_offload_action(&cls_flower.rule->action);
2560                 kfree(cls_flower.rule);
2561
2562                 if (err) {
2563                         __fl_put(f);
2564                         return err;
2565                 }
2566 next_flow:
2567                 __fl_put(f);
2568         }
2569
2570         return 0;
2571 }
2572
2573 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
2574 {
2575         struct flow_cls_offload *cls_flower = type_data;
2576         struct cls_fl_filter *f =
2577                 (struct cls_fl_filter *) cls_flower->cookie;
2578         struct cls_fl_head *head = fl_head_dereference(tp);
2579
2580         spin_lock(&tp->lock);
2581         list_add(&f->hw_list, &head->hw_filters);
2582         spin_unlock(&tp->lock);
2583 }
2584
2585 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
2586 {
2587         struct flow_cls_offload *cls_flower = type_data;
2588         struct cls_fl_filter *f =
2589                 (struct cls_fl_filter *) cls_flower->cookie;
2590
2591         spin_lock(&tp->lock);
2592         if (!list_empty(&f->hw_list))
2593                 list_del_init(&f->hw_list);
2594         spin_unlock(&tp->lock);
2595 }
2596
2597 static int fl_hw_create_tmplt(struct tcf_chain *chain,
2598                               struct fl_flow_tmplt *tmplt)
2599 {
2600         struct flow_cls_offload cls_flower = {};
2601         struct tcf_block *block = chain->block;
2602
2603         cls_flower.rule = flow_rule_alloc(0);
2604         if (!cls_flower.rule)
2605                 return -ENOMEM;
2606
2607         cls_flower.common.chain_index = chain->index;
2608         cls_flower.command = FLOW_CLS_TMPLT_CREATE;
2609         cls_flower.cookie = (unsigned long) tmplt;
2610         cls_flower.rule->match.dissector = &tmplt->dissector;
2611         cls_flower.rule->match.mask = &tmplt->mask;
2612         cls_flower.rule->match.key = &tmplt->dummy_key;
2613
2614         /* We don't care if driver (any of them) fails to handle this
2615          * call. It serves just as a hint for it.
2616          */
2617         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2618         kfree(cls_flower.rule);
2619
2620         return 0;
2621 }
2622
2623 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
2624                                 struct fl_flow_tmplt *tmplt)
2625 {
2626         struct flow_cls_offload cls_flower = {};
2627         struct tcf_block *block = chain->block;
2628
2629         cls_flower.common.chain_index = chain->index;
2630         cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
2631         cls_flower.cookie = (unsigned long) tmplt;
2632
2633         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2634 }
2635
2636 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
2637                              struct nlattr **tca,
2638                              struct netlink_ext_ack *extack)
2639 {
2640         struct fl_flow_tmplt *tmplt;
2641         struct nlattr **tb;
2642         int err;
2643
2644         if (!tca[TCA_OPTIONS])
2645                 return ERR_PTR(-EINVAL);
2646
2647         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2648         if (!tb)
2649                 return ERR_PTR(-ENOBUFS);
2650         err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2651                                           tca[TCA_OPTIONS], fl_policy, NULL);
2652         if (err)
2653                 goto errout_tb;
2654
2655         tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
2656         if (!tmplt) {
2657                 err = -ENOMEM;
2658                 goto errout_tb;
2659         }
2660         tmplt->chain = chain;
2661         err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
2662         if (err)
2663                 goto errout_tmplt;
2664
2665         fl_init_dissector(&tmplt->dissector, &tmplt->mask);
2666
2667         err = fl_hw_create_tmplt(chain, tmplt);
2668         if (err)
2669                 goto errout_tmplt;
2670
2671         kfree(tb);
2672         return tmplt;
2673
2674 errout_tmplt:
2675         kfree(tmplt);
2676 errout_tb:
2677         kfree(tb);
2678         return ERR_PTR(err);
2679 }
2680
2681 static void fl_tmplt_destroy(void *tmplt_priv)
2682 {
2683         struct fl_flow_tmplt *tmplt = tmplt_priv;
2684
2685         fl_hw_destroy_tmplt(tmplt->chain, tmplt);
2686         kfree(tmplt);
2687 }
2688
2689 static int fl_dump_key_val(struct sk_buff *skb,
2690                            void *val, int val_type,
2691                            void *mask, int mask_type, int len)
2692 {
2693         int err;
2694
2695         if (!memchr_inv(mask, 0, len))
2696                 return 0;
2697         err = nla_put(skb, val_type, len, val);
2698         if (err)
2699                 return err;
2700         if (mask_type != TCA_FLOWER_UNSPEC) {
2701                 err = nla_put(skb, mask_type, len, mask);
2702                 if (err)
2703                         return err;
2704         }
2705         return 0;
2706 }
2707
2708 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2709                                   struct fl_flow_key *mask)
2710 {
2711         if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2712                             TCA_FLOWER_KEY_PORT_DST_MIN,
2713                             &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2714                             sizeof(key->tp_range.tp_min.dst)) ||
2715             fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2716                             TCA_FLOWER_KEY_PORT_DST_MAX,
2717                             &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2718                             sizeof(key->tp_range.tp_max.dst)) ||
2719             fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2720                             TCA_FLOWER_KEY_PORT_SRC_MIN,
2721                             &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2722                             sizeof(key->tp_range.tp_min.src)) ||
2723             fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2724                             TCA_FLOWER_KEY_PORT_SRC_MAX,
2725                             &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2726                             sizeof(key->tp_range.tp_max.src)))
2727                 return -1;
2728
2729         return 0;
2730 }
2731
2732 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb,
2733                                     struct flow_dissector_key_mpls *mpls_key,
2734                                     struct flow_dissector_key_mpls *mpls_mask,
2735                                     u8 lse_index)
2736 {
2737         struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index];
2738         struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index];
2739         int err;
2740
2741         err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH,
2742                          lse_index + 1);
2743         if (err)
2744                 return err;
2745
2746         if (lse_mask->mpls_ttl) {
2747                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL,
2748                                  lse_key->mpls_ttl);
2749                 if (err)
2750                         return err;
2751         }
2752         if (lse_mask->mpls_bos) {
2753                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS,
2754                                  lse_key->mpls_bos);
2755                 if (err)
2756                         return err;
2757         }
2758         if (lse_mask->mpls_tc) {
2759                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC,
2760                                  lse_key->mpls_tc);
2761                 if (err)
2762                         return err;
2763         }
2764         if (lse_mask->mpls_label) {
2765                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
2766                                   lse_key->mpls_label);
2767                 if (err)
2768                         return err;
2769         }
2770
2771         return 0;
2772 }
2773
2774 static int fl_dump_key_mpls_opts(struct sk_buff *skb,
2775                                  struct flow_dissector_key_mpls *mpls_key,
2776                                  struct flow_dissector_key_mpls *mpls_mask)
2777 {
2778         struct nlattr *opts;
2779         struct nlattr *lse;
2780         u8 lse_index;
2781         int err;
2782
2783         opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS);
2784         if (!opts)
2785                 return -EMSGSIZE;
2786
2787         for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) {
2788                 if (!(mpls_mask->used_lses & 1 << lse_index))
2789                         continue;
2790
2791                 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE);
2792                 if (!lse) {
2793                         err = -EMSGSIZE;
2794                         goto err_opts;
2795                 }
2796
2797                 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask,
2798                                                lse_index);
2799                 if (err)
2800                         goto err_opts_lse;
2801                 nla_nest_end(skb, lse);
2802         }
2803         nla_nest_end(skb, opts);
2804
2805         return 0;
2806
2807 err_opts_lse:
2808         nla_nest_cancel(skb, lse);
2809 err_opts:
2810         nla_nest_cancel(skb, opts);
2811
2812         return err;
2813 }
2814
2815 static int fl_dump_key_mpls(struct sk_buff *skb,
2816                             struct flow_dissector_key_mpls *mpls_key,
2817                             struct flow_dissector_key_mpls *mpls_mask)
2818 {
2819         struct flow_dissector_mpls_lse *lse_mask;
2820         struct flow_dissector_mpls_lse *lse_key;
2821         int err;
2822
2823         if (!mpls_mask->used_lses)
2824                 return 0;
2825
2826         lse_mask = &mpls_mask->ls[0];
2827         lse_key = &mpls_key->ls[0];
2828
2829         /* For backward compatibility, don't use the MPLS nested attributes if
2830          * the rule can be expressed using the old attributes.
2831          */
2832         if (mpls_mask->used_lses & ~1 ||
2833             (!lse_mask->mpls_ttl && !lse_mask->mpls_bos &&
2834              !lse_mask->mpls_tc && !lse_mask->mpls_label))
2835                 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask);
2836
2837         if (lse_mask->mpls_ttl) {
2838                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2839                                  lse_key->mpls_ttl);
2840                 if (err)
2841                         return err;
2842         }
2843         if (lse_mask->mpls_tc) {
2844                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2845                                  lse_key->mpls_tc);
2846                 if (err)
2847                         return err;
2848         }
2849         if (lse_mask->mpls_label) {
2850                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2851                                   lse_key->mpls_label);
2852                 if (err)
2853                         return err;
2854         }
2855         if (lse_mask->mpls_bos) {
2856                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2857                                  lse_key->mpls_bos);
2858                 if (err)
2859                         return err;
2860         }
2861         return 0;
2862 }
2863
2864 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2865                           struct flow_dissector_key_ip *key,
2866                           struct flow_dissector_key_ip *mask)
2867 {
2868         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2869         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2870         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2871         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2872
2873         if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2874             fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2875                 return -1;
2876
2877         return 0;
2878 }
2879
2880 static int fl_dump_key_vlan(struct sk_buff *skb,
2881                             int vlan_id_key, int vlan_prio_key,
2882                             struct flow_dissector_key_vlan *vlan_key,
2883                             struct flow_dissector_key_vlan *vlan_mask)
2884 {
2885         int err;
2886
2887         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2888                 return 0;
2889         if (vlan_mask->vlan_id) {
2890                 err = nla_put_u16(skb, vlan_id_key,
2891                                   vlan_key->vlan_id);
2892                 if (err)
2893                         return err;
2894         }
2895         if (vlan_mask->vlan_priority) {
2896                 err = nla_put_u8(skb, vlan_prio_key,
2897                                  vlan_key->vlan_priority);
2898                 if (err)
2899                         return err;
2900         }
2901         return 0;
2902 }
2903
2904 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2905                             u32 *flower_key, u32 *flower_mask,
2906                             u32 flower_flag_bit, u32 dissector_flag_bit)
2907 {
2908         if (dissector_mask & dissector_flag_bit) {
2909                 *flower_mask |= flower_flag_bit;
2910                 if (dissector_key & dissector_flag_bit)
2911                         *flower_key |= flower_flag_bit;
2912         }
2913 }
2914
2915 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2916 {
2917         u32 key, mask;
2918         __be32 _key, _mask;
2919         int err;
2920
2921         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2922                 return 0;
2923
2924         key = 0;
2925         mask = 0;
2926
2927         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2928                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2929         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2930                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2931                         FLOW_DIS_FIRST_FRAG);
2932
2933         _key = cpu_to_be32(key);
2934         _mask = cpu_to_be32(mask);
2935
2936         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2937         if (err)
2938                 return err;
2939
2940         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2941 }
2942
2943 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
2944                                   struct flow_dissector_key_enc_opts *enc_opts)
2945 {
2946         struct geneve_opt *opt;
2947         struct nlattr *nest;
2948         int opt_off = 0;
2949
2950         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
2951         if (!nest)
2952                 goto nla_put_failure;
2953
2954         while (enc_opts->len > opt_off) {
2955                 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
2956
2957                 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
2958                                  opt->opt_class))
2959                         goto nla_put_failure;
2960                 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
2961                                opt->type))
2962                         goto nla_put_failure;
2963                 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
2964                             opt->length * 4, opt->opt_data))
2965                         goto nla_put_failure;
2966
2967                 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
2968         }
2969         nla_nest_end(skb, nest);
2970         return 0;
2971
2972 nla_put_failure:
2973         nla_nest_cancel(skb, nest);
2974         return -EMSGSIZE;
2975 }
2976
2977 static int fl_dump_key_vxlan_opt(struct sk_buff *skb,
2978                                  struct flow_dissector_key_enc_opts *enc_opts)
2979 {
2980         struct vxlan_metadata *md;
2981         struct nlattr *nest;
2982
2983         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN);
2984         if (!nest)
2985                 goto nla_put_failure;
2986
2987         md = (struct vxlan_metadata *)&enc_opts->data[0];
2988         if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp))
2989                 goto nla_put_failure;
2990
2991         nla_nest_end(skb, nest);
2992         return 0;
2993
2994 nla_put_failure:
2995         nla_nest_cancel(skb, nest);
2996         return -EMSGSIZE;
2997 }
2998
2999 static int fl_dump_key_erspan_opt(struct sk_buff *skb,
3000                                   struct flow_dissector_key_enc_opts *enc_opts)
3001 {
3002         struct erspan_metadata *md;
3003         struct nlattr *nest;
3004
3005         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN);
3006         if (!nest)
3007                 goto nla_put_failure;
3008
3009         md = (struct erspan_metadata *)&enc_opts->data[0];
3010         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version))
3011                 goto nla_put_failure;
3012
3013         if (md->version == 1 &&
3014             nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
3015                 goto nla_put_failure;
3016
3017         if (md->version == 2 &&
3018             (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR,
3019                         md->u.md2.dir) ||
3020              nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID,
3021                         get_hwid(&md->u.md2))))
3022                 goto nla_put_failure;
3023
3024         nla_nest_end(skb, nest);
3025         return 0;
3026
3027 nla_put_failure:
3028         nla_nest_cancel(skb, nest);
3029         return -EMSGSIZE;
3030 }
3031
3032 static int fl_dump_key_gtp_opt(struct sk_buff *skb,
3033                                struct flow_dissector_key_enc_opts *enc_opts)
3034
3035 {
3036         struct gtp_pdu_session_info *session_info;
3037         struct nlattr *nest;
3038
3039         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP);
3040         if (!nest)
3041                 goto nla_put_failure;
3042
3043         session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0];
3044
3045         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE,
3046                        session_info->pdu_type))
3047                 goto nla_put_failure;
3048
3049         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi))
3050                 goto nla_put_failure;
3051
3052         nla_nest_end(skb, nest);
3053         return 0;
3054
3055 nla_put_failure:
3056         nla_nest_cancel(skb, nest);
3057         return -EMSGSIZE;
3058 }
3059
3060 static int fl_dump_key_ct(struct sk_buff *skb,
3061                           struct flow_dissector_key_ct *key,
3062                           struct flow_dissector_key_ct *mask)
3063 {
3064         if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
3065             fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
3066                             &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
3067                             sizeof(key->ct_state)))
3068                 goto nla_put_failure;
3069
3070         if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
3071             fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
3072                             &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
3073                             sizeof(key->ct_zone)))
3074                 goto nla_put_failure;
3075
3076         if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
3077             fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
3078                             &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
3079                             sizeof(key->ct_mark)))
3080                 goto nla_put_failure;
3081
3082         if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
3083             fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
3084                             &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
3085                             sizeof(key->ct_labels)))
3086                 goto nla_put_failure;
3087
3088         return 0;
3089
3090 nla_put_failure:
3091         return -EMSGSIZE;
3092 }
3093
3094 static int fl_dump_key_cfm(struct sk_buff *skb,
3095                            struct flow_dissector_key_cfm *key,
3096                            struct flow_dissector_key_cfm *mask)
3097 {
3098         struct nlattr *opts;
3099         int err;
3100         u8 mdl;
3101
3102         if (!memchr_inv(mask, 0, sizeof(*mask)))
3103                 return 0;
3104
3105         opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM);
3106         if (!opts)
3107                 return -EMSGSIZE;
3108
3109         if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) {
3110                 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver);
3111                 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl);
3112                 if (err)
3113                         goto err_cfm_opts;
3114         }
3115
3116         if (mask->opcode) {
3117                 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode);
3118                 if (err)
3119                         goto err_cfm_opts;
3120         }
3121
3122         nla_nest_end(skb, opts);
3123
3124         return 0;
3125
3126 err_cfm_opts:
3127         nla_nest_cancel(skb, opts);
3128         return err;
3129 }
3130
3131 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
3132                                struct flow_dissector_key_enc_opts *enc_opts)
3133 {
3134         struct nlattr *nest;
3135         int err;
3136
3137         if (!enc_opts->len)
3138                 return 0;
3139
3140         nest = nla_nest_start_noflag(skb, enc_opt_type);
3141         if (!nest)
3142                 goto nla_put_failure;
3143
3144         switch (enc_opts->dst_opt_type) {
3145         case TUNNEL_GENEVE_OPT:
3146                 err = fl_dump_key_geneve_opt(skb, enc_opts);
3147                 if (err)
3148                         goto nla_put_failure;
3149                 break;
3150         case TUNNEL_VXLAN_OPT:
3151                 err = fl_dump_key_vxlan_opt(skb, enc_opts);
3152                 if (err)
3153                         goto nla_put_failure;
3154                 break;
3155         case TUNNEL_ERSPAN_OPT:
3156                 err = fl_dump_key_erspan_opt(skb, enc_opts);
3157                 if (err)
3158                         goto nla_put_failure;
3159                 break;
3160         case TUNNEL_GTP_OPT:
3161                 err = fl_dump_key_gtp_opt(skb, enc_opts);
3162                 if (err)
3163                         goto nla_put_failure;
3164                 break;
3165         default:
3166                 goto nla_put_failure;
3167         }
3168         nla_nest_end(skb, nest);
3169         return 0;
3170
3171 nla_put_failure:
3172         nla_nest_cancel(skb, nest);
3173         return -EMSGSIZE;
3174 }
3175
3176 static int fl_dump_key_enc_opt(struct sk_buff *skb,
3177                                struct flow_dissector_key_enc_opts *key_opts,
3178                                struct flow_dissector_key_enc_opts *msk_opts)
3179 {
3180         int err;
3181
3182         err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
3183         if (err)
3184                 return err;
3185
3186         return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
3187 }
3188
3189 static int fl_dump_key(struct sk_buff *skb, struct net *net,
3190                        struct fl_flow_key *key, struct fl_flow_key *mask)
3191 {
3192         if (mask->meta.ingress_ifindex) {
3193                 struct net_device *dev;
3194
3195                 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
3196                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
3197                         goto nla_put_failure;
3198         }
3199
3200         if (fl_dump_key_val(skb, &key->meta.l2_miss,
3201                             TCA_FLOWER_L2_MISS, &mask->meta.l2_miss,
3202                             TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss)))
3203                 goto nla_put_failure;
3204
3205         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
3206                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
3207                             sizeof(key->eth.dst)) ||
3208             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
3209                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
3210                             sizeof(key->eth.src)) ||
3211             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
3212                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
3213                             sizeof(key->basic.n_proto)))
3214                 goto nla_put_failure;
3215
3216         if (mask->num_of_vlans.num_of_vlans) {
3217                 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans))
3218                         goto nla_put_failure;
3219         }
3220
3221         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
3222                 goto nla_put_failure;
3223
3224         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
3225                              TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
3226                 goto nla_put_failure;
3227
3228         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
3229                              TCA_FLOWER_KEY_CVLAN_PRIO,
3230                              &key->cvlan, &mask->cvlan) ||
3231             (mask->cvlan.vlan_tpid &&
3232              nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
3233                           key->cvlan.vlan_tpid)))
3234                 goto nla_put_failure;
3235
3236         if (mask->basic.n_proto) {
3237                 if (mask->cvlan.vlan_eth_type) {
3238                         if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
3239                                          key->basic.n_proto))
3240                                 goto nla_put_failure;
3241                 } else if (mask->vlan.vlan_eth_type) {
3242                         if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
3243                                          key->vlan.vlan_eth_type))
3244                                 goto nla_put_failure;
3245                 }
3246         }
3247
3248         if ((key->basic.n_proto == htons(ETH_P_IP) ||
3249              key->basic.n_proto == htons(ETH_P_IPV6)) &&
3250             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
3251                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
3252                             sizeof(key->basic.ip_proto)) ||
3253             fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
3254                 goto nla_put_failure;
3255
3256         if (mask->pppoe.session_id) {
3257                 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID,
3258                                  key->pppoe.session_id))
3259                         goto nla_put_failure;
3260         }
3261         if (mask->basic.n_proto && mask->pppoe.ppp_proto) {
3262                 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO,
3263                                  key->pppoe.ppp_proto))
3264                         goto nla_put_failure;
3265         }
3266
3267         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3268             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
3269                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
3270                              sizeof(key->ipv4.src)) ||
3271              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
3272                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
3273                              sizeof(key->ipv4.dst))))
3274                 goto nla_put_failure;
3275         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3276                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
3277                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
3278                                   sizeof(key->ipv6.src)) ||
3279                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
3280                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
3281                                   sizeof(key->ipv6.dst))))
3282                 goto nla_put_failure;
3283
3284         if (key->basic.ip_proto == IPPROTO_TCP &&
3285             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
3286                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
3287                              sizeof(key->tp.src)) ||
3288              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
3289                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
3290                              sizeof(key->tp.dst)) ||
3291              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
3292                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
3293                              sizeof(key->tcp.flags))))
3294                 goto nla_put_failure;
3295         else if (key->basic.ip_proto == IPPROTO_UDP &&
3296                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
3297                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
3298                                   sizeof(key->tp.src)) ||
3299                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
3300                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
3301                                   sizeof(key->tp.dst))))
3302                 goto nla_put_failure;
3303         else if (key->basic.ip_proto == IPPROTO_SCTP &&
3304                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
3305                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
3306                                   sizeof(key->tp.src)) ||
3307                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
3308                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
3309                                   sizeof(key->tp.dst))))
3310                 goto nla_put_failure;
3311         else if (key->basic.n_proto == htons(ETH_P_IP) &&
3312                  key->basic.ip_proto == IPPROTO_ICMP &&
3313                  (fl_dump_key_val(skb, &key->icmp.type,
3314                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
3315                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
3316                                   sizeof(key->icmp.type)) ||
3317                   fl_dump_key_val(skb, &key->icmp.code,
3318                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
3319                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
3320                                   sizeof(key->icmp.code))))
3321                 goto nla_put_failure;
3322         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
3323                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
3324                  (fl_dump_key_val(skb, &key->icmp.type,
3325                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
3326                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
3327                                   sizeof(key->icmp.type)) ||
3328                   fl_dump_key_val(skb, &key->icmp.code,
3329                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
3330                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
3331                                   sizeof(key->icmp.code))))
3332                 goto nla_put_failure;
3333         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
3334                   key->basic.n_proto == htons(ETH_P_RARP)) &&
3335                  (fl_dump_key_val(skb, &key->arp.sip,
3336                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
3337                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
3338                                   sizeof(key->arp.sip)) ||
3339                   fl_dump_key_val(skb, &key->arp.tip,
3340                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
3341                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
3342                                   sizeof(key->arp.tip)) ||
3343                   fl_dump_key_val(skb, &key->arp.op,
3344                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
3345                                   TCA_FLOWER_KEY_ARP_OP_MASK,
3346                                   sizeof(key->arp.op)) ||
3347                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
3348                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
3349                                   sizeof(key->arp.sha)) ||
3350                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
3351                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
3352                                   sizeof(key->arp.tha))))
3353                 goto nla_put_failure;
3354         else if (key->basic.ip_proto == IPPROTO_L2TP &&
3355                  fl_dump_key_val(skb, &key->l2tpv3.session_id,
3356                                  TCA_FLOWER_KEY_L2TPV3_SID,
3357                                  &mask->l2tpv3.session_id,
3358                                  TCA_FLOWER_UNSPEC,
3359                                  sizeof(key->l2tpv3.session_id)))
3360                 goto nla_put_failure;
3361
3362         if ((key->basic.ip_proto == IPPROTO_TCP ||
3363              key->basic.ip_proto == IPPROTO_UDP ||
3364              key->basic.ip_proto == IPPROTO_SCTP) &&
3365              fl_dump_key_port_range(skb, key, mask))
3366                 goto nla_put_failure;
3367
3368         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3369             (fl_dump_key_val(skb, &key->enc_ipv4.src,
3370                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
3371                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
3372                             sizeof(key->enc_ipv4.src)) ||
3373              fl_dump_key_val(skb, &key->enc_ipv4.dst,
3374                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
3375                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
3376                              sizeof(key->enc_ipv4.dst))))
3377                 goto nla_put_failure;
3378         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3379                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
3380                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
3381                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
3382                             sizeof(key->enc_ipv6.src)) ||
3383                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
3384                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
3385                                  &mask->enc_ipv6.dst,
3386                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
3387                             sizeof(key->enc_ipv6.dst))))
3388                 goto nla_put_failure;
3389
3390         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
3391                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
3392                             sizeof(key->enc_key_id)) ||
3393             fl_dump_key_val(skb, &key->enc_tp.src,
3394                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
3395                             &mask->enc_tp.src,
3396                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
3397                             sizeof(key->enc_tp.src)) ||
3398             fl_dump_key_val(skb, &key->enc_tp.dst,
3399                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
3400                             &mask->enc_tp.dst,
3401                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
3402                             sizeof(key->enc_tp.dst)) ||
3403             fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
3404             fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
3405                 goto nla_put_failure;
3406
3407         if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
3408                 goto nla_put_failure;
3409
3410         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
3411                 goto nla_put_failure;
3412
3413         if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
3414                              &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
3415                              sizeof(key->hash.hash)))
3416                 goto nla_put_failure;
3417
3418         if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm))
3419                 goto nla_put_failure;
3420
3421         return 0;
3422
3423 nla_put_failure:
3424         return -EMSGSIZE;
3425 }
3426
3427 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
3428                    struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3429 {
3430         struct cls_fl_filter *f = fh;
3431         struct nlattr *nest;
3432         struct fl_flow_key *key, *mask;
3433         bool skip_hw;
3434
3435         if (!f)
3436                 return skb->len;
3437
3438         t->tcm_handle = f->handle;
3439
3440         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3441         if (!nest)
3442                 goto nla_put_failure;
3443
3444         spin_lock(&tp->lock);
3445
3446         if (f->res.classid &&
3447             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
3448                 goto nla_put_failure_locked;
3449
3450         key = &f->key;
3451         mask = &f->mask->key;
3452         skip_hw = tc_skip_hw(f->flags);
3453
3454         if (fl_dump_key(skb, net, key, mask))
3455                 goto nla_put_failure_locked;
3456
3457         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3458                 goto nla_put_failure_locked;
3459
3460         spin_unlock(&tp->lock);
3461
3462         if (!skip_hw)
3463                 fl_hw_update_stats(tp, f, rtnl_held);
3464
3465         if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
3466                 goto nla_put_failure;
3467
3468         if (tcf_exts_dump(skb, &f->exts))
3469                 goto nla_put_failure;
3470
3471         nla_nest_end(skb, nest);
3472
3473         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
3474                 goto nla_put_failure;
3475
3476         return skb->len;
3477
3478 nla_put_failure_locked:
3479         spin_unlock(&tp->lock);
3480 nla_put_failure:
3481         nla_nest_cancel(skb, nest);
3482         return -1;
3483 }
3484
3485 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh,
3486                          struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3487 {
3488         struct cls_fl_filter *f = fh;
3489         struct nlattr *nest;
3490         bool skip_hw;
3491
3492         if (!f)
3493                 return skb->len;
3494
3495         t->tcm_handle = f->handle;
3496
3497         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3498         if (!nest)
3499                 goto nla_put_failure;
3500
3501         spin_lock(&tp->lock);
3502
3503         skip_hw = tc_skip_hw(f->flags);
3504
3505         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3506                 goto nla_put_failure_locked;
3507
3508         spin_unlock(&tp->lock);
3509
3510         if (!skip_hw)
3511                 fl_hw_update_stats(tp, f, rtnl_held);
3512
3513         if (tcf_exts_terse_dump(skb, &f->exts))
3514                 goto nla_put_failure;
3515
3516         nla_nest_end(skb, nest);
3517
3518         return skb->len;
3519
3520 nla_put_failure_locked:
3521         spin_unlock(&tp->lock);
3522 nla_put_failure:
3523         nla_nest_cancel(skb, nest);
3524         return -1;
3525 }
3526
3527 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
3528 {
3529         struct fl_flow_tmplt *tmplt = tmplt_priv;
3530         struct fl_flow_key *key, *mask;
3531         struct nlattr *nest;
3532
3533         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3534         if (!nest)
3535                 goto nla_put_failure;
3536
3537         key = &tmplt->dummy_key;
3538         mask = &tmplt->mask;
3539
3540         if (fl_dump_key(skb, net, key, mask))
3541                 goto nla_put_failure;
3542
3543         nla_nest_end(skb, nest);
3544
3545         return skb->len;
3546
3547 nla_put_failure:
3548         nla_nest_cancel(skb, nest);
3549         return -EMSGSIZE;
3550 }
3551
3552 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
3553                           unsigned long base)
3554 {
3555         struct cls_fl_filter *f = fh;
3556
3557         tc_cls_bind_class(classid, cl, q, &f->res, base);
3558 }
3559
3560 static bool fl_delete_empty(struct tcf_proto *tp)
3561 {
3562         struct cls_fl_head *head = fl_head_dereference(tp);
3563
3564         spin_lock(&tp->lock);
3565         tp->deleting = idr_is_empty(&head->handle_idr);
3566         spin_unlock(&tp->lock);
3567
3568         return tp->deleting;
3569 }
3570
3571 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
3572         .kind           = "flower",
3573         .classify       = fl_classify,
3574         .init           = fl_init,
3575         .destroy        = fl_destroy,
3576         .get            = fl_get,
3577         .put            = fl_put,
3578         .change         = fl_change,
3579         .delete         = fl_delete,
3580         .delete_empty   = fl_delete_empty,
3581         .walk           = fl_walk,
3582         .reoffload      = fl_reoffload,
3583         .hw_add         = fl_hw_add,
3584         .hw_del         = fl_hw_del,
3585         .dump           = fl_dump,
3586         .terse_dump     = fl_terse_dump,
3587         .bind_class     = fl_bind_class,
3588         .tmplt_create   = fl_tmplt_create,
3589         .tmplt_destroy  = fl_tmplt_destroy,
3590         .tmplt_dump     = fl_tmplt_dump,
3591         .get_exts       = fl_get_exts,
3592         .owner          = THIS_MODULE,
3593         .flags          = TCF_PROTO_OPS_DOIT_UNLOCKED,
3594 };
3595
3596 static int __init cls_fl_init(void)
3597 {
3598         return register_tcf_proto_ops(&cls_fl_ops);
3599 }
3600
3601 static void __exit cls_fl_exit(void)
3602 {
3603         unregister_tcf_proto_ops(&cls_fl_ops);
3604 }
3605
3606 module_init(cls_fl_init);
3607 module_exit(cls_fl_exit);
3608
3609 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3610 MODULE_DESCRIPTION("Flower classifier");
3611 MODULE_LICENSE("GPL v2");