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_ipsec ipsec;
  76         struct flow_dissector_key_cfm cfm;
  77 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  78
  79 struct fl_flow_mask_range {
  80         unsigned short int start;
  81         unsigned short int end;
  82 };
  83
  84 struct fl_flow_mask {
  85         struct fl_flow_key key;
  86         struct fl_flow_mask_range range;
  87         u32 flags;
  88         struct rhash_head ht_node;
  89         struct rhashtable ht;
  90         struct rhashtable_params filter_ht_params;
  91         struct flow_dissector dissector;
  92         struct list_head filters;
  93         struct rcu_work rwork;
  94         struct list_head list;
  95         refcount_t refcnt;
  96 };
  97
  98 struct fl_flow_tmplt {
  99         struct fl_flow_key dummy_key;
 100         struct fl_flow_key mask;
 101         struct flow_dissector dissector;
 102         struct tcf_chain *chain;
 103 };
 104
 105 struct cls_fl_head {
 106         struct rhashtable ht;
 107         spinlock_t masks_lock; /* Protect masks list */
 108         struct list_head masks;
 109         struct list_head hw_filters;
 110         struct rcu_work rwork;
 111         struct idr handle_idr;
 112 };
 113
 114 struct cls_fl_filter {
 115         struct fl_flow_mask *mask;
 116         struct rhash_head ht_node;
 117         struct fl_flow_key mkey;
 118         struct tcf_exts exts;
 119         struct tcf_result res;
 120         struct fl_flow_key key;
 121         struct list_head list;
 122         struct list_head hw_list;
 123         u32 handle;
 124         u32 flags;
 125         u32 in_hw_count;
 126         u8 needs_tc_skb_ext:1;
 127         struct rcu_work rwork;
 128         struct net_device *hw_dev;
 129         /* Flower classifier is unlocked, which means that its reference counter
 130          * can be changed concurrently without any kind of external
 131          * synchronization. Use atomic reference counter to be concurrency-safe.
 132          */
 133         refcount_t refcnt;
 134         bool deleted;
 135 };
 136
 137 static const struct rhashtable_params mask_ht_params = {
 138         .key_offset = offsetof(struct fl_flow_mask, key),
 139         .key_len = sizeof(struct fl_flow_key),
 140         .head_offset = offsetof(struct fl_flow_mask, ht_node),
 141         .automatic_shrinking = true,
 142 };
 143
 144 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
 145 {
 146         return mask->range.end - mask->range.start;
 147 }
 148
 149 static void fl_mask_update_range(struct fl_flow_mask *mask)
 150 {
 151         const u8 *bytes = (const u8 *) &mask->key;
 152         size_t size = sizeof(mask->key);
 153         size_t i, first = 0, last;
 154
 155         for (i = 0; i < size; i++) {
 156                 if (bytes[i]) {
 157                         first = i;
 158                         break;
 159                 }
 160         }
 161         last = first;
 162         for (i = size - 1; i != first; i--) {
 163                 if (bytes[i]) {
 164                         last = i;
 165                         break;
 166                 }
 167         }
 168         mask->range.start = rounddown(first, sizeof(long));
 169         mask->range.end = roundup(last + 1, sizeof(long));
 170 }
 171
 172 static void *fl_key_get_start(struct fl_flow_key *key,
 173                               const struct fl_flow_mask *mask)
 174 {
 175         return (u8 *) key + mask->range.start;
 176 }
 177
 178 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 179                               struct fl_flow_mask *mask)
 180 {
 181         const long *lkey = fl_key_get_start(key, mask);
 182         const long *lmask = fl_key_get_start(&mask->key, mask);
 183         long *lmkey = fl_key_get_start(mkey, mask);
 184         int i;
 185
 186         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 187                 *lmkey++ = *lkey++ & *lmask++;
 188 }
 189
 190 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
 191                                struct fl_flow_mask *mask)
 192 {
 193         const long *lmask = fl_key_get_start(&mask->key, mask);
 194         const long *ltmplt;
 195         int i;
 196
 197         if (!tmplt)
 198                 return true;
 199         ltmplt = fl_key_get_start(&tmplt->mask, mask);
 200         for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
 201                 if (~*ltmplt++ & *lmask++)
 202                         return false;
 203         }
 204         return true;
 205 }
 206
 207 static void fl_clear_masked_range(struct fl_flow_key *key,
 208                                   struct fl_flow_mask *mask)
 209 {
 210         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 211 }
 212
 213 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
 214                                   struct fl_flow_key *key,
 215                                   struct fl_flow_key *mkey)
 216 {
 217         u16 min_mask, max_mask, min_val, max_val;
 218
 219         min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst);
 220         max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst);
 221         min_val = ntohs(filter->key.tp_range.tp_min.dst);
 222         max_val = ntohs(filter->key.tp_range.tp_max.dst);
 223
 224         if (min_mask && max_mask) {
 225                 if (ntohs(key->tp_range.tp.dst) < min_val ||
 226                     ntohs(key->tp_range.tp.dst) > max_val)
 227                         return false;
 228
 229                 /* skb does not have min and max values */
 230                 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst;
 231                 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst;
 232         }
 233         return true;
 234 }
 235
 236 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
 237                                   struct fl_flow_key *key,
 238                                   struct fl_flow_key *mkey)
 239 {
 240         u16 min_mask, max_mask, min_val, max_val;
 241
 242         min_mask = ntohs(filter->mask->key.tp_range.tp_min.src);
 243         max_mask = ntohs(filter->mask->key.tp_range.tp_max.src);
 244         min_val = ntohs(filter->key.tp_range.tp_min.src);
 245         max_val = ntohs(filter->key.tp_range.tp_max.src);
 246
 247         if (min_mask && max_mask) {
 248                 if (ntohs(key->tp_range.tp.src) < min_val ||
 249                     ntohs(key->tp_range.tp.src) > max_val)
 250                         return false;
 251
 252                 /* skb does not have min and max values */
 253                 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src;
 254                 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src;
 255         }
 256         return true;
 257 }
 258
 259 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
 260                                          struct fl_flow_key *mkey)
 261 {
 262         return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
 263                                       mask->filter_ht_params);
 264 }
 265
 266 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
 267                                              struct fl_flow_key *mkey,
 268                                              struct fl_flow_key *key)
 269 {
 270         struct cls_fl_filter *filter, *f;
 271
 272         list_for_each_entry_rcu(filter, &mask->filters, list) {
 273                 if (!fl_range_port_dst_cmp(filter, key, mkey))
 274                         continue;
 275
 276                 if (!fl_range_port_src_cmp(filter, key, mkey))
 277                         continue;
 278
 279                 f = __fl_lookup(mask, mkey);
 280                 if (f)
 281                         return f;
 282         }
 283         return NULL;
 284 }
 285
 286 static noinline_for_stack
 287 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key)
 288 {
 289         struct fl_flow_key mkey;
 290
 291         fl_set_masked_key(&mkey, key, mask);
 292         if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
 293                 return fl_lookup_range(mask, &mkey, key);
 294
 295         return __fl_lookup(mask, &mkey);
 296 }
 297
 298 static u16 fl_ct_info_to_flower_map[] = {
 299         [IP_CT_ESTABLISHED] =           TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 300                                         TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
 301         [IP_CT_RELATED] =               TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 302                                         TCA_FLOWER_KEY_CT_FLAGS_RELATED,
 303         [IP_CT_ESTABLISHED_REPLY] =     TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 304                                         TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED |
 305                                         TCA_FLOWER_KEY_CT_FLAGS_REPLY,
 306         [IP_CT_RELATED_REPLY] =         TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 307                                         TCA_FLOWER_KEY_CT_FLAGS_RELATED |
 308                                         TCA_FLOWER_KEY_CT_FLAGS_REPLY,
 309         [IP_CT_NEW] =                   TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 310                                         TCA_FLOWER_KEY_CT_FLAGS_NEW,
 311 };
 312
 313 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb,
 314                                   const struct tcf_proto *tp,
 315                                   struct tcf_result *res)
 316 {
 317         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 318         bool post_ct = tc_skb_cb(skb)->post_ct;
 319         u16 zone = tc_skb_cb(skb)->zone;
 320         struct fl_flow_key skb_key;
 321         struct fl_flow_mask *mask;
 322         struct cls_fl_filter *f;
 323
 324         list_for_each_entry_rcu(mask, &head->masks, list) {
 325                 flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
 326                 fl_clear_masked_range(&skb_key, mask);
 327
 328                 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key);
 329                 /* skb_flow_dissect() does not set n_proto in case an unknown
 330                  * protocol, so do it rather here.
 331                  */
 332                 skb_key.basic.n_proto = skb_protocol(skb, false);
 333                 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
 334                 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key,
 335                                     fl_ct_info_to_flower_map,
 336                                     ARRAY_SIZE(fl_ct_info_to_flower_map),
 337                                     post_ct, zone);
 338                 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key);
 339                 skb_flow_dissect(skb, &mask->dissector, &skb_key,
 340                                  FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP);
 341
 342                 f = fl_mask_lookup(mask, &skb_key);
 343                 if (f && !tc_skip_sw(f->flags)) {
 344                         *res = f->res;
 345                         return tcf_exts_exec(skb, &f->exts, res);
 346                 }
 347         }
 348         return -1;
 349 }
 350
 351 static int fl_init(struct tcf_proto *tp)
 352 {
 353         struct cls_fl_head *head;
 354
 355         head = kzalloc(sizeof(*head), GFP_KERNEL);
 356         if (!head)
 357                 return -ENOBUFS;
 358
 359         spin_lock_init(&head->masks_lock);
 360         INIT_LIST_HEAD_RCU(&head->masks);
 361         INIT_LIST_HEAD(&head->hw_filters);
 362         rcu_assign_pointer(tp->root, head);
 363         idr_init(&head->handle_idr);
 364
 365         return rhashtable_init(&head->ht, &mask_ht_params);
 366 }
 367
 368 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
 369 {
 370         /* temporary masks don't have their filters list and ht initialized */
 371         if (mask_init_done) {
 372                 WARN_ON(!list_empty(&mask->filters));
 373                 rhashtable_destroy(&mask->ht);
 374         }
 375         kfree(mask);
 376 }
 377
 378 static void fl_mask_free_work(struct work_struct *work)
 379 {
 380         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 381                                                  struct fl_flow_mask, rwork);
 382
 383         fl_mask_free(mask, true);
 384 }
 385
 386 static void fl_uninit_mask_free_work(struct work_struct *work)
 387 {
 388         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 389                                                  struct fl_flow_mask, rwork);
 390
 391         fl_mask_free(mask, false);
 392 }
 393
 394 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
 395 {
 396         if (!refcount_dec_and_test(&mask->refcnt))
 397                 return false;
 398
 399         rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
 400
 401         spin_lock(&head->masks_lock);
 402         list_del_rcu(&mask->list);
 403         spin_unlock(&head->masks_lock);
 404
 405         tcf_queue_work(&mask->rwork, fl_mask_free_work);
 406
 407         return true;
 408 }
 409
 410 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
 411 {
 412         /* Flower classifier only changes root pointer during init and destroy.
 413          * Users must obtain reference to tcf_proto instance before calling its
 414          * API, so tp->root pointer is protected from concurrent call to
 415          * fl_destroy() by reference counting.
 416          */
 417         return rcu_dereference_raw(tp->root);
 418 }
 419
 420 static void __fl_destroy_filter(struct cls_fl_filter *f)
 421 {
 422         if (f->needs_tc_skb_ext)
 423                 tc_skb_ext_tc_disable();
 424         tcf_exts_destroy(&f->exts);
 425         tcf_exts_put_net(&f->exts);
 426         kfree(f);
 427 }
 428
 429 static void fl_destroy_filter_work(struct work_struct *work)
 430 {
 431         struct cls_fl_filter *f = container_of(to_rcu_work(work),
 432                                         struct cls_fl_filter, rwork);
 433
 434         __fl_destroy_filter(f);
 435 }
 436
 437 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
 438                                  bool rtnl_held, struct netlink_ext_ack *extack)
 439 {
 440         struct tcf_block *block = tp->chain->block;
 441         struct flow_cls_offload cls_flower = {};
 442
 443         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 444         cls_flower.command = FLOW_CLS_DESTROY;
 445         cls_flower.cookie = (unsigned long) f;
 446
 447         tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false,
 448                             &f->flags, &f->in_hw_count, rtnl_held);
 449
 450 }
 451
 452 static int fl_hw_replace_filter(struct tcf_proto *tp,
 453                                 struct cls_fl_filter *f, bool rtnl_held,
 454                                 struct netlink_ext_ack *extack)
 455 {
 456         struct tcf_block *block = tp->chain->block;
 457         struct flow_cls_offload cls_flower = {};
 458         bool skip_sw = tc_skip_sw(f->flags);
 459         int err = 0;
 460
 461         cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
 462         if (!cls_flower.rule)
 463                 return -ENOMEM;
 464
 465         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 466         cls_flower.command = FLOW_CLS_REPLACE;
 467         cls_flower.cookie = (unsigned long) f;
 468         cls_flower.rule->match.dissector = &f->mask->dissector;
 469         cls_flower.rule->match.mask = &f->mask->key;
 470         cls_flower.rule->match.key = &f->mkey;
 471         cls_flower.classid = f->res.classid;
 472
 473         err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts,
 474                                       cls_flower.common.extack);
 475         if (err) {
 476                 kfree(cls_flower.rule);
 477
 478                 return skip_sw ? err : 0;
 479         }
 480
 481         err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower,
 482                               skip_sw, &f->flags, &f->in_hw_count, rtnl_held);
 483         tc_cleanup_offload_action(&cls_flower.rule->action);
 484         kfree(cls_flower.rule);
 485
 486         if (err) {
 487                 fl_hw_destroy_filter(tp, f, rtnl_held, NULL);
 488                 return err;
 489         }
 490
 491         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 492                 return -EINVAL;
 493
 494         return 0;
 495 }
 496
 497 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
 498                                bool rtnl_held)
 499 {
 500         struct tcf_block *block = tp->chain->block;
 501         struct flow_cls_offload cls_flower = {};
 502
 503         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
 504         cls_flower.command = FLOW_CLS_STATS;
 505         cls_flower.cookie = (unsigned long) f;
 506         cls_flower.classid = f->res.classid;
 507
 508         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false,
 509                          rtnl_held);
 510
 511         tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats);
 512 }
 513
 514 static void __fl_put(struct cls_fl_filter *f)
 515 {
 516         if (!refcount_dec_and_test(&f->refcnt))
 517                 return;
 518
 519         if (tcf_exts_get_net(&f->exts))
 520                 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
 521         else
 522                 __fl_destroy_filter(f);
 523 }
 524
 525 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
 526 {
 527         struct cls_fl_filter *f;
 528
 529         rcu_read_lock();
 530         f = idr_find(&head->handle_idr, handle);
 531         if (f && !refcount_inc_not_zero(&f->refcnt))
 532                 f = NULL;
 533         rcu_read_unlock();
 534
 535         return f;
 536 }
 537
 538 static struct tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle)
 539 {
 540         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 541         struct cls_fl_filter *f;
 542
 543         f = idr_find(&head->handle_idr, handle);
 544         return f ? &f->exts : NULL;
 545 }
 546
 547 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
 548                        bool *last, bool rtnl_held,
 549                        struct netlink_ext_ack *extack)
 550 {
 551         struct cls_fl_head *head = fl_head_dereference(tp);
 552
 553         *last = false;
 554
 555         spin_lock(&tp->lock);
 556         if (f->deleted) {
 557                 spin_unlock(&tp->lock);
 558                 return -ENOENT;
 559         }
 560
 561         f->deleted = true;
 562         rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
 563                                f->mask->filter_ht_params);
 564         idr_remove(&head->handle_idr, f->handle);
 565         list_del_rcu(&f->list);
 566         spin_unlock(&tp->lock);
 567
 568         *last = fl_mask_put(head, f->mask);
 569         if (!tc_skip_hw(f->flags))
 570                 fl_hw_destroy_filter(tp, f, rtnl_held, extack);
 571         tcf_unbind_filter(tp, &f->res);
 572         __fl_put(f);
 573
 574         return 0;
 575 }
 576
 577 static void fl_destroy_sleepable(struct work_struct *work)
 578 {
 579         struct cls_fl_head *head = container_of(to_rcu_work(work),
 580                                                 struct cls_fl_head,
 581                                                 rwork);
 582
 583         rhashtable_destroy(&head->ht);
 584         kfree(head);
 585         module_put(THIS_MODULE);
 586 }
 587
 588 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
 589                        struct netlink_ext_ack *extack)
 590 {
 591         struct cls_fl_head *head = fl_head_dereference(tp);
 592         struct fl_flow_mask *mask, *next_mask;
 593         struct cls_fl_filter *f, *next;
 594         bool last;
 595
 596         list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
 597                 list_for_each_entry_safe(f, next, &mask->filters, list) {
 598                         __fl_delete(tp, f, &last, rtnl_held, extack);
 599                         if (last)
 600                                 break;
 601                 }
 602         }
 603         idr_destroy(&head->handle_idr);
 604
 605         __module_get(THIS_MODULE);
 606         tcf_queue_work(&head->rwork, fl_destroy_sleepable);
 607 }
 608
 609 static void fl_put(struct tcf_proto *tp, void *arg)
 610 {
 611         struct cls_fl_filter *f = arg;
 612
 613         __fl_put(f);
 614 }
 615
 616 static void *fl_get(struct tcf_proto *tp, u32 handle)
 617 {
 618         struct cls_fl_head *head = fl_head_dereference(tp);
 619
 620         return __fl_get(head, handle);
 621 }
 622
 623 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 624         [TCA_FLOWER_UNSPEC]             = { .strict_start_type =
 625                                                 TCA_FLOWER_L2_MISS },
 626         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 627         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 628                                             .len = IFNAMSIZ },
 629         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 630         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 631         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 632         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 633         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 634         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 635         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 636         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 637         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 638         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 639         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 640         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 641         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 642         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 643         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 644         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 645         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 646         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 647         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 648         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 649         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 650         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 651         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 652         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 653         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 654         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 655         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 656         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 657         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 658         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 659         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 660         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 661         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 662         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 663         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 664         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 665         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 666         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 667         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 668         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 669         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 670         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 671         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 672         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 673         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 674         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 675         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 676         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 677         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 678         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 679         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 680         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 681         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 682         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 683         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 684         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 685         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 686         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 687         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 688         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 689         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 690         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 691         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 692         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 693         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 694         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 695         [TCA_FLOWER_KEY_MPLS_OPTS]      = { .type = NLA_NESTED },
 696         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 697         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 698         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 699         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 700         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 701         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 702         [TCA_FLOWER_KEY_CVLAN_ID]       = { .type = NLA_U16 },
 703         [TCA_FLOWER_KEY_CVLAN_PRIO]     = { .type = NLA_U8 },
 704         [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
 705         [TCA_FLOWER_KEY_ENC_IP_TOS]     = { .type = NLA_U8 },
 706         [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
 707         [TCA_FLOWER_KEY_ENC_IP_TTL]      = { .type = NLA_U8 },
 708         [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
 709         [TCA_FLOWER_KEY_ENC_OPTS]       = { .type = NLA_NESTED },
 710         [TCA_FLOWER_KEY_ENC_OPTS_MASK]  = { .type = NLA_NESTED },
 711         [TCA_FLOWER_KEY_CT_STATE]       =
 712                 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
 713         [TCA_FLOWER_KEY_CT_STATE_MASK]  =
 714                 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK),
 715         [TCA_FLOWER_KEY_CT_ZONE]        = { .type = NLA_U16 },
 716         [TCA_FLOWER_KEY_CT_ZONE_MASK]   = { .type = NLA_U16 },
 717         [TCA_FLOWER_KEY_CT_MARK]        = { .type = NLA_U32 },
 718         [TCA_FLOWER_KEY_CT_MARK_MASK]   = { .type = NLA_U32 },
 719         [TCA_FLOWER_KEY_CT_LABELS]      = { .type = NLA_BINARY,
 720                                             .len = 128 / BITS_PER_BYTE },
 721         [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY,
 722                                             .len = 128 / BITS_PER_BYTE },
 723         [TCA_FLOWER_FLAGS]              = { .type = NLA_U32 },
 724         [TCA_FLOWER_KEY_HASH]           = { .type = NLA_U32 },
 725         [TCA_FLOWER_KEY_HASH_MASK]      = { .type = NLA_U32 },
 726         [TCA_FLOWER_KEY_NUM_OF_VLANS]   = { .type = NLA_U8 },
 727         [TCA_FLOWER_KEY_PPPOE_SID]      = { .type = NLA_U16 },
 728         [TCA_FLOWER_KEY_PPP_PROTO]      = { .type = NLA_U16 },
 729         [TCA_FLOWER_KEY_L2TPV3_SID]     = { .type = NLA_U32 },
 730         [TCA_FLOWER_KEY_SPI]            = { .type = NLA_U32 },
 731         [TCA_FLOWER_KEY_SPI_MASK]       = { .type = NLA_U32 },
 732         [TCA_FLOWER_L2_MISS]            = NLA_POLICY_MAX(NLA_U8, 1),
 733         [TCA_FLOWER_KEY_CFM]            = { .type = NLA_NESTED },
 734 };
 735
 736 static const struct nla_policy
 737 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
 738         [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC]        = {
 739                 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN },
 740         [TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
 741         [TCA_FLOWER_KEY_ENC_OPTS_VXLAN]         = { .type = NLA_NESTED },
 742         [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN]        = { .type = NLA_NESTED },
 743         [TCA_FLOWER_KEY_ENC_OPTS_GTP]           = { .type = NLA_NESTED },
 744 };
 745
 746 static const struct nla_policy
 747 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
 748         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
 749         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
 750         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
 751                                                        .len = 128 },
 752 };
 753
 754 static const struct nla_policy
 755 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = {
 756         [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]         = { .type = NLA_U32 },
 757 };
 758
 759 static const struct nla_policy
 760 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
 761         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]        = { .type = NLA_U8 },
 762         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]      = { .type = NLA_U32 },
 763         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]        = { .type = NLA_U8 },
 764         [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]       = { .type = NLA_U8 },
 765 };
 766
 767 static const struct nla_policy
 768 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = {
 769         [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]      = { .type = NLA_U8 },
 770         [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]           = { .type = NLA_U8 },
 771 };
 772
 773 static const struct nla_policy
 774 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = {
 775         [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]    = { .type = NLA_U8 },
 776         [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]      = { .type = NLA_U8 },
 777         [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]      = { .type = NLA_U8 },
 778         [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]       = { .type = NLA_U8 },
 779         [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]    = { .type = NLA_U32 },
 780 };
 781
 782 static const struct nla_policy
 783 cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX + 1] = {
 784         [TCA_FLOWER_KEY_CFM_MD_LEVEL]   = NLA_POLICY_MAX(NLA_U8,
 785                                                 FLOW_DIS_CFM_MDL_MAX),
 786         [TCA_FLOWER_KEY_CFM_OPCODE]     = { .type = NLA_U8 },
 787 };
 788
 789 static void fl_set_key_val(struct nlattr **tb,
 790                            void *val, int val_type,
 791                            void *mask, int mask_type, int len)
 792 {
 793         if (!tb[val_type])
 794                 return;
 795         nla_memcpy(val, tb[val_type], len);
 796         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 797                 memset(mask, 0xff, len);
 798         else
 799                 nla_memcpy(mask, tb[mask_type], len);
 800 }
 801
 802 static int fl_set_key_spi(struct nlattr **tb, struct fl_flow_key *key,
 803                           struct fl_flow_key *mask,
 804                           struct netlink_ext_ack *extack)
 805 {
 806         if (key->basic.ip_proto != IPPROTO_ESP &&
 807             key->basic.ip_proto != IPPROTO_AH) {
 808                 NL_SET_ERR_MSG(extack,
 809                                "Protocol must be either ESP or AH");
 810                 return -EINVAL;
 811         }
 812
 813         fl_set_key_val(tb, &key->ipsec.spi,
 814                        TCA_FLOWER_KEY_SPI,
 815                        &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK,
 816                        sizeof(key->ipsec.spi));
 817         return 0;
 818 }
 819
 820 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
 821                                  struct fl_flow_key *mask,
 822                                  struct netlink_ext_ack *extack)
 823 {
 824         fl_set_key_val(tb, &key->tp_range.tp_min.dst,
 825                        TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst,
 826                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst));
 827         fl_set_key_val(tb, &key->tp_range.tp_max.dst,
 828                        TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst,
 829                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst));
 830         fl_set_key_val(tb, &key->tp_range.tp_min.src,
 831                        TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src,
 832                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src));
 833         fl_set_key_val(tb, &key->tp_range.tp_max.src,
 834                        TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src,
 835                        TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src));
 836
 837         if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) {
 838                 NL_SET_ERR_MSG(extack,
 839                                "Both min and max destination ports must be specified");
 840                 return -EINVAL;
 841         }
 842         if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) {
 843                 NL_SET_ERR_MSG(extack,
 844                                "Both min and max source ports must be specified");
 845                 return -EINVAL;
 846         }
 847         if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst &&
 848             ntohs(key->tp_range.tp_max.dst) <=
 849             ntohs(key->tp_range.tp_min.dst)) {
 850                 NL_SET_ERR_MSG_ATTR(extack,
 851                                     tb[TCA_FLOWER_KEY_PORT_DST_MIN],
 852                                     "Invalid destination port range (min must be strictly smaller than max)");
 853                 return -EINVAL;
 854         }
 855         if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src &&
 856             ntohs(key->tp_range.tp_max.src) <=
 857             ntohs(key->tp_range.tp_min.src)) {
 858                 NL_SET_ERR_MSG_ATTR(extack,
 859                                     tb[TCA_FLOWER_KEY_PORT_SRC_MIN],
 860                                     "Invalid source port range (min must be strictly smaller than max)");
 861                 return -EINVAL;
 862         }
 863
 864         return 0;
 865 }
 866
 867 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse,
 868                                struct flow_dissector_key_mpls *key_val,
 869                                struct flow_dissector_key_mpls *key_mask,
 870                                struct netlink_ext_ack *extack)
 871 {
 872         struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1];
 873         struct flow_dissector_mpls_lse *lse_mask;
 874         struct flow_dissector_mpls_lse *lse_val;
 875         u8 lse_index;
 876         u8 depth;
 877         int err;
 878
 879         err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse,
 880                                mpls_stack_entry_policy, extack);
 881         if (err < 0)
 882                 return err;
 883
 884         if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) {
 885                 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\"");
 886                 return -EINVAL;
 887         }
 888
 889         depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]);
 890
 891         /* LSE depth starts at 1, for consistency with terminology used by
 892          * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets.
 893          */
 894         if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) {
 895                 NL_SET_ERR_MSG_ATTR(extack,
 896                                     tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH],
 897                                     "Invalid MPLS depth");
 898                 return -EINVAL;
 899         }
 900         lse_index = depth - 1;
 901
 902         dissector_set_mpls_lse(key_val, lse_index);
 903         dissector_set_mpls_lse(key_mask, lse_index);
 904
 905         lse_val = &key_val->ls[lse_index];
 906         lse_mask = &key_mask->ls[lse_index];
 907
 908         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) {
 909                 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]);
 910                 lse_mask->mpls_ttl = MPLS_TTL_MASK;
 911         }
 912         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) {
 913                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]);
 914
 915                 if (bos & ~MPLS_BOS_MASK) {
 916                         NL_SET_ERR_MSG_ATTR(extack,
 917                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS],
 918                                             "Bottom Of Stack (BOS) must be 0 or 1");
 919                         return -EINVAL;
 920                 }
 921                 lse_val->mpls_bos = bos;
 922                 lse_mask->mpls_bos = MPLS_BOS_MASK;
 923         }
 924         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) {
 925                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]);
 926
 927                 if (tc & ~MPLS_TC_MASK) {
 928                         NL_SET_ERR_MSG_ATTR(extack,
 929                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC],
 930                                             "Traffic Class (TC) must be between 0 and 7");
 931                         return -EINVAL;
 932                 }
 933                 lse_val->mpls_tc = tc;
 934                 lse_mask->mpls_tc = MPLS_TC_MASK;
 935         }
 936         if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) {
 937                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]);
 938
 939                 if (label & ~MPLS_LABEL_MASK) {
 940                         NL_SET_ERR_MSG_ATTR(extack,
 941                                             tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL],
 942                                             "Label must be between 0 and 1048575");
 943                         return -EINVAL;
 944                 }
 945                 lse_val->mpls_label = label;
 946                 lse_mask->mpls_label = MPLS_LABEL_MASK;
 947         }
 948
 949         return 0;
 950 }
 951
 952 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts,
 953                                 struct flow_dissector_key_mpls *key_val,
 954                                 struct flow_dissector_key_mpls *key_mask,
 955                                 struct netlink_ext_ack *extack)
 956 {
 957         struct nlattr *nla_lse;
 958         int rem;
 959         int err;
 960
 961         if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) {
 962                 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts,
 963                                     "NLA_F_NESTED is missing");
 964                 return -EINVAL;
 965         }
 966
 967         nla_for_each_nested(nla_lse, nla_mpls_opts, rem) {
 968                 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) {
 969                         NL_SET_ERR_MSG_ATTR(extack, nla_lse,
 970                                             "Invalid MPLS option type");
 971                         return -EINVAL;
 972                 }
 973
 974                 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack);
 975                 if (err < 0)
 976                         return err;
 977         }
 978         if (rem) {
 979                 NL_SET_ERR_MSG(extack,
 980                                "Bytes leftover after parsing MPLS options");
 981                 return -EINVAL;
 982         }
 983
 984         return 0;
 985 }
 986
 987 static int fl_set_key_mpls(struct nlattr **tb,
 988                            struct flow_dissector_key_mpls *key_val,
 989                            struct flow_dissector_key_mpls *key_mask,
 990                            struct netlink_ext_ack *extack)
 991 {
 992         struct flow_dissector_mpls_lse *lse_mask;
 993         struct flow_dissector_mpls_lse *lse_val;
 994
 995         if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) {
 996                 if (tb[TCA_FLOWER_KEY_MPLS_TTL] ||
 997                     tb[TCA_FLOWER_KEY_MPLS_BOS] ||
 998                     tb[TCA_FLOWER_KEY_MPLS_TC] ||
 999                     tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
1000                         NL_SET_ERR_MSG_ATTR(extack,
1001                                             tb[TCA_FLOWER_KEY_MPLS_OPTS],
1002                                             "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute");
1003                         return -EBADMSG;
1004                 }
1005
1006                 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS],
1007                                             key_val, key_mask, extack);
1008         }
1009
1010         lse_val = &key_val->ls[0];
1011         lse_mask = &key_mask->ls[0];
1012
1013         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
1014                 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
1015                 lse_mask->mpls_ttl = MPLS_TTL_MASK;
1016                 dissector_set_mpls_lse(key_val, 0);
1017                 dissector_set_mpls_lse(key_mask, 0);
1018         }
1019         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
1020                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
1021
1022                 if (bos & ~MPLS_BOS_MASK) {
1023                         NL_SET_ERR_MSG_ATTR(extack,
1024                                             tb[TCA_FLOWER_KEY_MPLS_BOS],
1025                                             "Bottom Of Stack (BOS) must be 0 or 1");
1026                         return -EINVAL;
1027                 }
1028                 lse_val->mpls_bos = bos;
1029                 lse_mask->mpls_bos = MPLS_BOS_MASK;
1030                 dissector_set_mpls_lse(key_val, 0);
1031                 dissector_set_mpls_lse(key_mask, 0);
1032         }
1033         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
1034                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
1035
1036                 if (tc & ~MPLS_TC_MASK) {
1037                         NL_SET_ERR_MSG_ATTR(extack,
1038                                             tb[TCA_FLOWER_KEY_MPLS_TC],
1039                                             "Traffic Class (TC) must be between 0 and 7");
1040                         return -EINVAL;
1041                 }
1042                 lse_val->mpls_tc = tc;
1043                 lse_mask->mpls_tc = MPLS_TC_MASK;
1044                 dissector_set_mpls_lse(key_val, 0);
1045                 dissector_set_mpls_lse(key_mask, 0);
1046         }
1047         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
1048                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
1049
1050                 if (label & ~MPLS_LABEL_MASK) {
1051                         NL_SET_ERR_MSG_ATTR(extack,
1052                                             tb[TCA_FLOWER_KEY_MPLS_LABEL],
1053                                             "Label must be between 0 and 1048575");
1054                         return -EINVAL;
1055                 }
1056                 lse_val->mpls_label = label;
1057                 lse_mask->mpls_label = MPLS_LABEL_MASK;
1058                 dissector_set_mpls_lse(key_val, 0);
1059                 dissector_set_mpls_lse(key_mask, 0);
1060         }
1061         return 0;
1062 }
1063
1064 static void fl_set_key_vlan(struct nlattr **tb,
1065                             __be16 ethertype,
1066                             int vlan_id_key, int vlan_prio_key,
1067                             int vlan_next_eth_type_key,
1068                             struct flow_dissector_key_vlan *key_val,
1069                             struct flow_dissector_key_vlan *key_mask)
1070 {
1071 #define VLAN_PRIORITY_MASK      0x7
1072
1073         if (tb[vlan_id_key]) {
1074                 key_val->vlan_id =
1075                         nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
1076                 key_mask->vlan_id = VLAN_VID_MASK;
1077         }
1078         if (tb[vlan_prio_key]) {
1079                 key_val->vlan_priority =
1080                         nla_get_u8(tb[vlan_prio_key]) &
1081                         VLAN_PRIORITY_MASK;
1082                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
1083         }
1084         if (ethertype) {
1085                 key_val->vlan_tpid = ethertype;
1086                 key_mask->vlan_tpid = cpu_to_be16(~0);
1087         }
1088         if (tb[vlan_next_eth_type_key]) {
1089                 key_val->vlan_eth_type =
1090                         nla_get_be16(tb[vlan_next_eth_type_key]);
1091                 key_mask->vlan_eth_type = cpu_to_be16(~0);
1092         }
1093 }
1094
1095 static void fl_set_key_pppoe(struct nlattr **tb,
1096                              struct flow_dissector_key_pppoe *key_val,
1097                              struct flow_dissector_key_pppoe *key_mask,
1098                              struct fl_flow_key *key,
1099                              struct fl_flow_key *mask)
1100 {
1101         /* key_val::type must be set to ETH_P_PPP_SES
1102          * because ETH_P_PPP_SES was stored in basic.n_proto
1103          * which might get overwritten by ppp_proto
1104          * or might be set to 0, the role of key_val::type
1105          * is similar to vlan_key::tpid
1106          */
1107         key_val->type = htons(ETH_P_PPP_SES);
1108         key_mask->type = cpu_to_be16(~0);
1109
1110         if (tb[TCA_FLOWER_KEY_PPPOE_SID]) {
1111                 key_val->session_id =
1112                         nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]);
1113                 key_mask->session_id = cpu_to_be16(~0);
1114         }
1115         if (tb[TCA_FLOWER_KEY_PPP_PROTO]) {
1116                 key_val->ppp_proto =
1117                         nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]);
1118                 key_mask->ppp_proto = cpu_to_be16(~0);
1119
1120                 if (key_val->ppp_proto == htons(PPP_IP)) {
1121                         key->basic.n_proto = htons(ETH_P_IP);
1122                         mask->basic.n_proto = cpu_to_be16(~0);
1123                 } else if (key_val->ppp_proto == htons(PPP_IPV6)) {
1124                         key->basic.n_proto = htons(ETH_P_IPV6);
1125                         mask->basic.n_proto = cpu_to_be16(~0);
1126                 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) {
1127                         key->basic.n_proto = htons(ETH_P_MPLS_UC);
1128                         mask->basic.n_proto = cpu_to_be16(~0);
1129                 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) {
1130                         key->basic.n_proto = htons(ETH_P_MPLS_MC);
1131                         mask->basic.n_proto = cpu_to_be16(~0);
1132                 }
1133         } else {
1134                 key->basic.n_proto = 0;
1135                 mask->basic.n_proto = cpu_to_be16(0);
1136         }
1137 }
1138
1139 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
1140                             u32 *dissector_key, u32 *dissector_mask,
1141                             u32 flower_flag_bit, u32 dissector_flag_bit)
1142 {
1143         if (flower_mask & flower_flag_bit) {
1144                 *dissector_mask |= dissector_flag_bit;
1145                 if (flower_key & flower_flag_bit)
1146                         *dissector_key |= dissector_flag_bit;
1147         }
1148 }
1149
1150 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key,
1151                             u32 *flags_mask, struct netlink_ext_ack *extack)
1152 {
1153         u32 key, mask;
1154
1155         /* mask is mandatory for flags */
1156         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) {
1157                 NL_SET_ERR_MSG(extack, "Missing flags mask");
1158                 return -EINVAL;
1159         }
1160
1161         key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS]));
1162         mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
1163
1164         *flags_key  = 0;
1165         *flags_mask = 0;
1166
1167         fl_set_key_flag(key, mask, flags_key, flags_mask,
1168                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1169         fl_set_key_flag(key, mask, flags_key, flags_mask,
1170                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1171                         FLOW_DIS_FIRST_FRAG);
1172
1173         return 0;
1174 }
1175
1176 static void fl_set_key_ip(struct nlattr **tb, bool encap,
1177                           struct flow_dissector_key_ip *key,
1178                           struct flow_dissector_key_ip *mask)
1179 {
1180         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1181         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1182         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1183         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1184
1185         fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
1186         fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
1187 }
1188
1189 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
1190                              int depth, int option_len,
1191                              struct netlink_ext_ack *extack)
1192 {
1193         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
1194         struct nlattr *class = NULL, *type = NULL, *data = NULL;
1195         struct geneve_opt *opt;
1196         int err, data_len = 0;
1197
1198         if (option_len > sizeof(struct geneve_opt))
1199                 data_len = option_len - sizeof(struct geneve_opt);
1200
1201         if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4)
1202                 return -ERANGE;
1203
1204         opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
1205         memset(opt, 0xff, option_len);
1206         opt->length = data_len / 4;
1207         opt->r1 = 0;
1208         opt->r2 = 0;
1209         opt->r3 = 0;
1210
1211         /* If no mask has been prodived we assume an exact match. */
1212         if (!depth)
1213                 return sizeof(struct geneve_opt) + data_len;
1214
1215         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
1216                 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
1217                 return -EINVAL;
1218         }
1219
1220         err = nla_parse_nested_deprecated(tb,
1221                                           TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
1222                                           nla, geneve_opt_policy, extack);
1223         if (err < 0)
1224                 return err;
1225
1226         /* We are not allowed to omit any of CLASS, TYPE or DATA
1227          * fields from the key.
1228          */
1229         if (!option_len &&
1230             (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
1231              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
1232              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
1233                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
1234                 return -EINVAL;
1235         }
1236
1237         /* Omitting any of CLASS, TYPE or DATA fields is allowed
1238          * for the mask.
1239          */
1240         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
1241                 int new_len = key->enc_opts.len;
1242
1243                 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
1244                 data_len = nla_len(data);
1245                 if (data_len < 4) {
1246                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
1247                         return -ERANGE;
1248                 }
1249                 if (data_len % 4) {
1250                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
1251                         return -ERANGE;
1252                 }
1253
1254                 new_len += sizeof(struct geneve_opt) + data_len;
1255                 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
1256                 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
1257                         NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
1258                         return -ERANGE;
1259                 }
1260                 opt->length = data_len / 4;
1261                 memcpy(opt->opt_data, nla_data(data), data_len);
1262         }
1263
1264         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
1265                 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
1266                 opt->opt_class = nla_get_be16(class);
1267         }
1268
1269         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
1270                 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
1271                 opt->type = nla_get_u8(type);
1272         }
1273
1274         return sizeof(struct geneve_opt) + data_len;
1275 }
1276
1277 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1278                             int depth, int option_len,
1279                             struct netlink_ext_ack *extack)
1280 {
1281         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1];
1282         struct vxlan_metadata *md;
1283         int err;
1284
1285         md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1286         memset(md, 0xff, sizeof(*md));
1287
1288         if (!depth)
1289                 return sizeof(*md);
1290
1291         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) {
1292                 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask");
1293                 return -EINVAL;
1294         }
1295
1296         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla,
1297                                vxlan_opt_policy, extack);
1298         if (err < 0)
1299                 return err;
1300
1301         if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1302                 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp");
1303                 return -EINVAL;
1304         }
1305
1306         if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) {
1307                 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]);
1308                 md->gbp &= VXLAN_GBP_MASK;
1309         }
1310
1311         return sizeof(*md);
1312 }
1313
1314 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
1315                              int depth, int option_len,
1316                              struct netlink_ext_ack *extack)
1317 {
1318         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1];
1319         struct erspan_metadata *md;
1320         int err;
1321
1322         md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len];
1323         memset(md, 0xff, sizeof(*md));
1324         md->version = 1;
1325
1326         if (!depth)
1327                 return sizeof(*md);
1328
1329         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) {
1330                 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask");
1331                 return -EINVAL;
1332         }
1333
1334         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla,
1335                                erspan_opt_policy, extack);
1336         if (err < 0)
1337                 return err;
1338
1339         if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) {
1340                 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver");
1341                 return -EINVAL;
1342         }
1343
1344         if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER])
1345                 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]);
1346
1347         if (md->version == 1) {
1348                 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1349                         NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index");
1350                         return -EINVAL;
1351                 }
1352                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) {
1353                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX];
1354                         memset(&md->u, 0x00, sizeof(md->u));
1355                         md->u.index = nla_get_be32(nla);
1356                 }
1357         } else if (md->version == 2) {
1358                 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] ||
1359                                     !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) {
1360                         NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid");
1361                         return -EINVAL;
1362                 }
1363                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) {
1364                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR];
1365                         md->u.md2.dir = nla_get_u8(nla);
1366                 }
1367                 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) {
1368                         nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID];
1369                         set_hwid(&md->u.md2, nla_get_u8(nla));
1370                 }
1371         } else {
1372                 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect");
1373                 return -EINVAL;
1374         }
1375
1376         return sizeof(*md);
1377 }
1378
1379 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key,
1380                           int depth, int option_len,
1381                           struct netlink_ext_ack *extack)
1382 {
1383         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1];
1384         struct gtp_pdu_session_info *sinfo;
1385         u8 len = key->enc_opts.len;
1386         int err;
1387
1388         sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len];
1389         memset(sinfo, 0xff, option_len);
1390
1391         if (!depth)
1392                 return sizeof(*sinfo);
1393
1394         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) {
1395                 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask");
1396                 return -EINVAL;
1397         }
1398
1399         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla,
1400                                gtp_opt_policy, extack);
1401         if (err < 0)
1402                 return err;
1403
1404         if (!option_len &&
1405             (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] ||
1406              !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) {
1407                 NL_SET_ERR_MSG_MOD(extack,
1408                                    "Missing tunnel key gtp option pdu type or qfi");
1409                 return -EINVAL;
1410         }
1411
1412         if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE])
1413                 sinfo->pdu_type =
1414                         nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]);
1415
1416         if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])
1417                 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]);
1418
1419         return sizeof(*sinfo);
1420 }
1421
1422 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
1423                           struct fl_flow_key *mask,
1424                           struct netlink_ext_ack *extack)
1425 {
1426         const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
1427         int err, option_len, key_depth, msk_depth = 0;
1428
1429         err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
1430                                              TCA_FLOWER_KEY_ENC_OPTS_MAX,
1431                                              enc_opts_policy, extack);
1432         if (err)
1433                 return err;
1434
1435         nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
1436
1437         if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
1438                 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
1439                                                      TCA_FLOWER_KEY_ENC_OPTS_MAX,
1440                                                      enc_opts_policy, extack);
1441                 if (err)
1442                         return err;
1443
1444                 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1445                 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
1446                 if (!nla_ok(nla_opt_msk, msk_depth)) {
1447                         NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks");
1448                         return -EINVAL;
1449                 }
1450         }
1451
1452         nla_for_each_attr(nla_opt_key, nla_enc_key,
1453                           nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
1454                 switch (nla_type(nla_opt_key)) {
1455                 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
1456                         if (key->enc_opts.dst_opt_type &&
1457                             key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) {
1458                                 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options");
1459                                 return -EINVAL;
1460                         }
1461                         option_len = 0;
1462                         key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1463                         option_len = fl_set_geneve_opt(nla_opt_key, key,
1464                                                        key_depth, option_len,
1465                                                        extack);
1466                         if (option_len < 0)
1467                                 return option_len;
1468
1469                         key->enc_opts.len += option_len;
1470                         /* At the same time we need to parse through the mask
1471                          * in order to verify exact and mask attribute lengths.
1472                          */
1473                         mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
1474                         option_len = fl_set_geneve_opt(nla_opt_msk, mask,
1475                                                        msk_depth, option_len,
1476                                                        extack);
1477                         if (option_len < 0)
1478                                 return option_len;
1479
1480                         mask->enc_opts.len += option_len;
1481                         if (key->enc_opts.len != mask->enc_opts.len) {
1482                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1483                                 return -EINVAL;
1484                         }
1485                         break;
1486                 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN:
1487                         if (key->enc_opts.dst_opt_type) {
1488                                 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options");
1489                                 return -EINVAL;
1490                         }
1491                         option_len = 0;
1492                         key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1493                         option_len = fl_set_vxlan_opt(nla_opt_key, key,
1494                                                       key_depth, option_len,
1495                                                       extack);
1496                         if (option_len < 0)
1497                                 return option_len;
1498
1499                         key->enc_opts.len += option_len;
1500                         /* At the same time we need to parse through the mask
1501                          * in order to verify exact and mask attribute lengths.
1502                          */
1503                         mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT;
1504                         option_len = fl_set_vxlan_opt(nla_opt_msk, mask,
1505                                                       msk_depth, option_len,
1506                                                       extack);
1507                         if (option_len < 0)
1508                                 return option_len;
1509
1510                         mask->enc_opts.len += option_len;
1511                         if (key->enc_opts.len != mask->enc_opts.len) {
1512                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1513                                 return -EINVAL;
1514                         }
1515                         break;
1516                 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN:
1517                         if (key->enc_opts.dst_opt_type) {
1518                                 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options");
1519                                 return -EINVAL;
1520                         }
1521                         option_len = 0;
1522                         key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1523                         option_len = fl_set_erspan_opt(nla_opt_key, key,
1524                                                        key_depth, option_len,
1525                                                        extack);
1526                         if (option_len < 0)
1527                                 return option_len;
1528
1529                         key->enc_opts.len += option_len;
1530                         /* At the same time we need to parse through the mask
1531                          * in order to verify exact and mask attribute lengths.
1532                          */
1533                         mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT;
1534                         option_len = fl_set_erspan_opt(nla_opt_msk, mask,
1535                                                        msk_depth, option_len,
1536                                                        extack);
1537                         if (option_len < 0)
1538                                 return option_len;
1539
1540                         mask->enc_opts.len += option_len;
1541                         if (key->enc_opts.len != mask->enc_opts.len) {
1542                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
1543                                 return -EINVAL;
1544                         }
1545                         break;
1546                 case TCA_FLOWER_KEY_ENC_OPTS_GTP:
1547                         if (key->enc_opts.dst_opt_type) {
1548                                 NL_SET_ERR_MSG_MOD(extack,
1549                                                    "Duplicate type for gtp options");
1550                                 return -EINVAL;
1551                         }
1552                         option_len = 0;
1553                         key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
1554                         option_len = fl_set_gtp_opt(nla_opt_key, key,
1555                                                     key_depth, option_len,
1556                                                     extack);
1557                         if (option_len < 0)
1558                                 return option_len;
1559
1560                         key->enc_opts.len += option_len;
1561                         /* At the same time we need to parse through the mask
1562                          * in order to verify exact and mask attribute lengths.
1563                          */
1564                         mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
1565                         option_len = fl_set_gtp_opt(nla_opt_msk, mask,
1566                                                     msk_depth, option_len,
1567                                                     extack);
1568                         if (option_len < 0)
1569                                 return option_len;
1570
1571                         mask->enc_opts.len += option_len;
1572                         if (key->enc_opts.len != mask->enc_opts.len) {
1573                                 NL_SET_ERR_MSG_MOD(extack,
1574                                                    "Key and mask miss aligned");
1575                                 return -EINVAL;
1576                         }
1577                         break;
1578                 default:
1579                         NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
1580                         return -EINVAL;
1581                 }
1582
1583                 if (!msk_depth)
1584                         continue;
1585
1586                 if (!nla_ok(nla_opt_msk, msk_depth)) {
1587                         NL_SET_ERR_MSG(extack, "A mask attribute is invalid");
1588                         return -EINVAL;
1589                 }
1590                 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
1591         }
1592
1593         return 0;
1594 }
1595
1596 static int fl_validate_ct_state(u16 state, struct nlattr *tb,
1597                                 struct netlink_ext_ack *extack)
1598 {
1599         if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) {
1600                 NL_SET_ERR_MSG_ATTR(extack, tb,
1601                                     "no trk, so no other flag can be set");
1602                 return -EINVAL;
1603         }
1604
1605         if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1606             state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
1607                 NL_SET_ERR_MSG_ATTR(extack, tb,
1608                                     "new and est are mutually exclusive");
1609                 return -EINVAL;
1610         }
1611
1612         if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID &&
1613             state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
1614                       TCA_FLOWER_KEY_CT_FLAGS_INVALID)) {
1615                 NL_SET_ERR_MSG_ATTR(extack, tb,
1616                                     "when inv is set, only trk may be set");
1617                 return -EINVAL;
1618         }
1619
1620         if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW &&
1621             state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) {
1622                 NL_SET_ERR_MSG_ATTR(extack, tb,
1623                                     "new and rpl are mutually exclusive");
1624                 return -EINVAL;
1625         }
1626
1627         return 0;
1628 }
1629
1630 static int fl_set_key_ct(struct nlattr **tb,
1631                          struct flow_dissector_key_ct *key,
1632                          struct flow_dissector_key_ct *mask,
1633                          struct netlink_ext_ack *extack)
1634 {
1635         if (tb[TCA_FLOWER_KEY_CT_STATE]) {
1636                 int err;
1637
1638                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) {
1639                         NL_SET_ERR_MSG(extack, "Conntrack isn't enabled");
1640                         return -EOPNOTSUPP;
1641                 }
1642                 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
1643                                &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
1644                                sizeof(key->ct_state));
1645
1646                 err = fl_validate_ct_state(key->ct_state & mask->ct_state,
1647                                            tb[TCA_FLOWER_KEY_CT_STATE_MASK],
1648                                            extack);
1649                 if (err)
1650                         return err;
1651
1652         }
1653         if (tb[TCA_FLOWER_KEY_CT_ZONE]) {
1654                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1655                         NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled");
1656                         return -EOPNOTSUPP;
1657                 }
1658                 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
1659                                &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
1660                                sizeof(key->ct_zone));
1661         }
1662         if (tb[TCA_FLOWER_KEY_CT_MARK]) {
1663                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1664                         NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled");
1665                         return -EOPNOTSUPP;
1666                 }
1667                 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
1668                                &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
1669                                sizeof(key->ct_mark));
1670         }
1671         if (tb[TCA_FLOWER_KEY_CT_LABELS]) {
1672                 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1673                         NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled");
1674                         return -EOPNOTSUPP;
1675                 }
1676                 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
1677                                mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
1678                                sizeof(key->ct_labels));
1679         }
1680
1681         return 0;
1682 }
1683
1684 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype,
1685                         struct fl_flow_key *key, struct fl_flow_key *mask,
1686                         int vthresh)
1687 {
1688         const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh;
1689
1690         if (!tb) {
1691                 *ethertype = 0;
1692                 return good_num_of_vlans;
1693         }
1694
1695         *ethertype = nla_get_be16(tb);
1696         if (good_num_of_vlans || eth_type_vlan(*ethertype))
1697                 return true;
1698
1699         key->basic.n_proto = *ethertype;
1700         mask->basic.n_proto = cpu_to_be16(~0);
1701         return false;
1702 }
1703
1704 static void fl_set_key_cfm_md_level(struct nlattr **tb,
1705                                     struct fl_flow_key *key,
1706                                     struct fl_flow_key *mask,
1707                                     struct netlink_ext_ack *extack)
1708 {
1709         u8 level;
1710
1711         if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL])
1712                 return;
1713
1714         level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]);
1715         key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level);
1716         mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK;
1717 }
1718
1719 static void fl_set_key_cfm_opcode(struct nlattr **tb,
1720                                   struct fl_flow_key *key,
1721                                   struct fl_flow_key *mask,
1722                                   struct netlink_ext_ack *extack)
1723 {
1724         fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE,
1725                        &mask->cfm.opcode, TCA_FLOWER_UNSPEC,
1726                        sizeof(key->cfm.opcode));
1727 }
1728
1729 static int fl_set_key_cfm(struct nlattr **tb,
1730                           struct fl_flow_key *key,
1731                           struct fl_flow_key *mask,
1732                           struct netlink_ext_ack *extack)
1733 {
1734         struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1];
1735         int err;
1736
1737         if (!tb[TCA_FLOWER_KEY_CFM])
1738                 return 0;
1739
1740         err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX,
1741                                tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack);
1742         if (err < 0)
1743                 return err;
1744
1745         fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack);
1746         fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack);
1747
1748         return 0;
1749 }
1750
1751 static int fl_set_key(struct net *net, struct nlattr **tb,
1752                       struct fl_flow_key *key, struct fl_flow_key *mask,
1753                       struct netlink_ext_ack *extack)
1754 {
1755         __be16 ethertype;
1756         int ret = 0;
1757
1758         if (tb[TCA_FLOWER_INDEV]) {
1759                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
1760                 if (err < 0)
1761                         return err;
1762                 key->meta.ingress_ifindex = err;
1763                 mask->meta.ingress_ifindex = 0xffffffff;
1764         }
1765
1766         fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS,
1767                        &mask->meta.l2_miss, TCA_FLOWER_UNSPEC,
1768                        sizeof(key->meta.l2_miss));
1769
1770         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1771                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1772                        sizeof(key->eth.dst));
1773         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1774                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1775                        sizeof(key->eth.src));
1776         fl_set_key_val(tb, &key->num_of_vlans,
1777                        TCA_FLOWER_KEY_NUM_OF_VLANS,
1778                        &mask->num_of_vlans,
1779                        TCA_FLOWER_UNSPEC,
1780                        sizeof(key->num_of_vlans));
1781
1782         if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], &ethertype, key, mask, 0)) {
1783                 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
1784                                 TCA_FLOWER_KEY_VLAN_PRIO,
1785                                 TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1786                                 &key->vlan, &mask->vlan);
1787
1788                 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE],
1789                                 &ethertype, key, mask, 1)) {
1790                         fl_set_key_vlan(tb, ethertype,
1791                                         TCA_FLOWER_KEY_CVLAN_ID,
1792                                         TCA_FLOWER_KEY_CVLAN_PRIO,
1793                                         TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1794                                         &key->cvlan, &mask->cvlan);
1795                         fl_set_key_val(tb, &key->basic.n_proto,
1796                                        TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1797                                        &mask->basic.n_proto,
1798                                        TCA_FLOWER_UNSPEC,
1799                                        sizeof(key->basic.n_proto));
1800                 }
1801         }
1802
1803         if (key->basic.n_proto == htons(ETH_P_PPP_SES))
1804                 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask);
1805
1806         if (key->basic.n_proto == htons(ETH_P_IP) ||
1807             key->basic.n_proto == htons(ETH_P_IPV6)) {
1808                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1809                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1810                                sizeof(key->basic.ip_proto));
1811                 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
1812         }
1813
1814         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
1815                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1816                 mask->control.addr_type = ~0;
1817                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1818                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1819                                sizeof(key->ipv4.src));
1820                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1821                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1822                                sizeof(key->ipv4.dst));
1823         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
1824                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1825                 mask->control.addr_type = ~0;
1826                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1827                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1828                                sizeof(key->ipv6.src));
1829                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1830                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1831                                sizeof(key->ipv6.dst));
1832         }
1833
1834         if (key->basic.ip_proto == IPPROTO_TCP) {
1835                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1836                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1837                                sizeof(key->tp.src));
1838                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1839                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1840                                sizeof(key->tp.dst));
1841                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1842                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1843                                sizeof(key->tcp.flags));
1844         } else if (key->basic.ip_proto == IPPROTO_UDP) {
1845                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1846                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1847                                sizeof(key->tp.src));
1848                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1849                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1850                                sizeof(key->tp.dst));
1851         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
1852                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1853                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1854                                sizeof(key->tp.src));
1855                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1856                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1857                                sizeof(key->tp.dst));
1858         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
1859                    key->basic.ip_proto == IPPROTO_ICMP) {
1860                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
1861                                &mask->icmp.type,
1862                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1863                                sizeof(key->icmp.type));
1864                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
1865                                &mask->icmp.code,
1866                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1867                                sizeof(key->icmp.code));
1868         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1869                    key->basic.ip_proto == IPPROTO_ICMPV6) {
1870                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
1871                                &mask->icmp.type,
1872                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1873                                sizeof(key->icmp.type));
1874                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1875                                &mask->icmp.code,
1876                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1877                                sizeof(key->icmp.code));
1878         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1879                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1880                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack);
1881                 if (ret)
1882                         return ret;
1883         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1884                    key->basic.n_proto == htons(ETH_P_RARP)) {
1885                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1886                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1887                                sizeof(key->arp.sip));
1888                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1889                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1890                                sizeof(key->arp.tip));
1891                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1892                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1893                                sizeof(key->arp.op));
1894                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1895                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1896                                sizeof(key->arp.sha));
1897                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1898                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1899                                sizeof(key->arp.tha));
1900         } else if (key->basic.ip_proto == IPPROTO_L2TP) {
1901                 fl_set_key_val(tb, &key->l2tpv3.session_id,
1902                                TCA_FLOWER_KEY_L2TPV3_SID,
1903                                &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC,
1904                                sizeof(key->l2tpv3.session_id));
1905         } else if (key->basic.n_proto  == htons(ETH_P_CFM)) {
1906                 ret = fl_set_key_cfm(tb, key, mask, extack);
1907                 if (ret)
1908                         return ret;
1909         }
1910
1911         if (key->basic.ip_proto == IPPROTO_TCP ||
1912             key->basic.ip_proto == IPPROTO_UDP ||
1913             key->basic.ip_proto == IPPROTO_SCTP) {
1914                 ret = fl_set_key_port_range(tb, key, mask, extack);
1915                 if (ret)
1916                         return ret;
1917         }
1918
1919         if (tb[TCA_FLOWER_KEY_SPI]) {
1920                 ret = fl_set_key_spi(tb, key, mask, extack);
1921                 if (ret)
1922                         return ret;
1923         }
1924
1925         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1926             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1927                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1928                 mask->enc_control.addr_type = ~0;
1929                 fl_set_key_val(tb, &key->enc_ipv4.src,
1930                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
1931                                &mask->enc_ipv4.src,
1932                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1933                                sizeof(key->enc_ipv4.src));
1934                 fl_set_key_val(tb, &key->enc_ipv4.dst,
1935                                TCA_FLOWER_KEY_ENC_IPV4_DST,
1936                                &mask->enc_ipv4.dst,
1937                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1938                                sizeof(key->enc_ipv4.dst));
1939         }
1940
1941         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1942             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1943                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1944                 mask->enc_control.addr_type = ~0;
1945                 fl_set_key_val(tb, &key->enc_ipv6.src,
1946                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
1947                                &mask->enc_ipv6.src,
1948                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1949                                sizeof(key->enc_ipv6.src));
1950                 fl_set_key_val(tb, &key->enc_ipv6.dst,
1951                                TCA_FLOWER_KEY_ENC_IPV6_DST,
1952                                &mask->enc_ipv6.dst,
1953                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1954                                sizeof(key->enc_ipv6.dst));
1955         }
1956
1957         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1958                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1959                        sizeof(key->enc_key_id.keyid));
1960
1961         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1962                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1963                        sizeof(key->enc_tp.src));
1964
1965         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1966                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1967                        sizeof(key->enc_tp.dst));
1968
1969         fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1970
1971         fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
1972                        &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
1973                        sizeof(key->hash.hash));
1974
1975         if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1976                 ret = fl_set_enc_opt(tb, key, mask, extack);
1977                 if (ret)
1978                         return ret;
1979         }
1980
1981         ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack);
1982         if (ret)
1983                 return ret;
1984
1985         if (tb[TCA_FLOWER_KEY_FLAGS])
1986                 ret = fl_set_key_flags(tb, &key->control.flags,
1987                                        &mask->control.flags, extack);
1988
1989         return ret;
1990 }
1991
1992 static void fl_mask_copy(struct fl_flow_mask *dst,
1993                          struct fl_flow_mask *src)
1994 {
1995         const void *psrc = fl_key_get_start(&src->key, src);
1996         void *pdst = fl_key_get_start(&dst->key, src);
1997
1998         memcpy(pdst, psrc, fl_mask_range(src));
1999         dst->range = src->range;
2000 }
2001
2002 static const struct rhashtable_params fl_ht_params = {
2003         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
2004         .head_offset = offsetof(struct cls_fl_filter, ht_node),
2005         .automatic_shrinking = true,
2006 };
2007
2008 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
2009 {
2010         mask->filter_ht_params = fl_ht_params;
2011         mask->filter_ht_params.key_len = fl_mask_range(mask);
2012         mask->filter_ht_params.key_offset += mask->range.start;
2013
2014         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
2015 }
2016
2017 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
2018 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member)
2019
2020 #define FL_KEY_IS_MASKED(mask, member)                                          \
2021         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
2022                    0, FL_KEY_MEMBER_SIZE(member))                               \
2023
2024 #define FL_KEY_SET(keys, cnt, id, member)                                       \
2025         do {                                                                    \
2026                 keys[cnt].key_id = id;                                          \
2027                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
2028                 cnt++;                                                          \
2029         } while(0);
2030
2031 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
2032         do {                                                                    \
2033                 if (FL_KEY_IS_MASKED(mask, member))                             \
2034                         FL_KEY_SET(keys, cnt, id, member);                      \
2035         } while(0);
2036
2037 static void fl_init_dissector(struct flow_dissector *dissector,
2038                               struct fl_flow_key *mask)
2039 {
2040         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
2041         size_t cnt = 0;
2042
2043         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2044                              FLOW_DISSECTOR_KEY_META, meta);
2045         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
2046         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
2047         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2048                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
2049         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2050                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
2051         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2052                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
2053         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2054                              FLOW_DISSECTOR_KEY_PORTS, tp);
2055         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2056                              FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range);
2057         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2058                              FLOW_DISSECTOR_KEY_IP, ip);
2059         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2060                              FLOW_DISSECTOR_KEY_TCP, tcp);
2061         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2062                              FLOW_DISSECTOR_KEY_ICMP, icmp);
2063         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2064                              FLOW_DISSECTOR_KEY_ARP, arp);
2065         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2066                              FLOW_DISSECTOR_KEY_MPLS, mpls);
2067         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2068                              FLOW_DISSECTOR_KEY_VLAN, vlan);
2069         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2070                              FLOW_DISSECTOR_KEY_CVLAN, cvlan);
2071         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2072                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
2073         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2074                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
2075         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2076                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
2077         if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
2078             FL_KEY_IS_MASKED(mask, enc_ipv6))
2079                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
2080                            enc_control);
2081         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2082                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
2083         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2084                              FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
2085         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2086                              FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
2087         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2088                              FLOW_DISSECTOR_KEY_CT, ct);
2089         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2090                              FLOW_DISSECTOR_KEY_HASH, hash);
2091         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2092                              FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans);
2093         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2094                              FLOW_DISSECTOR_KEY_PPPOE, pppoe);
2095         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2096                              FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3);
2097         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2098                              FLOW_DISSECTOR_KEY_IPSEC, ipsec);
2099         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
2100                              FLOW_DISSECTOR_KEY_CFM, cfm);
2101
2102         skb_flow_dissector_init(dissector, keys, cnt);
2103 }
2104
2105 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
2106                                                struct fl_flow_mask *mask)
2107 {
2108         struct fl_flow_mask *newmask;
2109         int err;
2110
2111         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
2112         if (!newmask)
2113                 return ERR_PTR(-ENOMEM);
2114
2115         fl_mask_copy(newmask, mask);
2116
2117         if ((newmask->key.tp_range.tp_min.dst &&
2118              newmask->key.tp_range.tp_max.dst) ||
2119             (newmask->key.tp_range.tp_min.src &&
2120              newmask->key.tp_range.tp_max.src))
2121                 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
2122
2123         err = fl_init_mask_hashtable(newmask);
2124         if (err)
2125                 goto errout_free;
2126
2127         fl_init_dissector(&newmask->dissector, &newmask->key);
2128
2129         INIT_LIST_HEAD_RCU(&newmask->filters);
2130
2131         refcount_set(&newmask->refcnt, 1);
2132         err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
2133                                       &newmask->ht_node, mask_ht_params);
2134         if (err)
2135                 goto errout_destroy;
2136
2137         spin_lock(&head->masks_lock);
2138         list_add_tail_rcu(&newmask->list, &head->masks);
2139         spin_unlock(&head->masks_lock);
2140
2141         return newmask;
2142
2143 errout_destroy:
2144         rhashtable_destroy(&newmask->ht);
2145 errout_free:
2146         kfree(newmask);
2147
2148         return ERR_PTR(err);
2149 }
2150
2151 static int fl_check_assign_mask(struct cls_fl_head *head,
2152                                 struct cls_fl_filter *fnew,
2153                                 struct cls_fl_filter *fold,
2154                                 struct fl_flow_mask *mask)
2155 {
2156         struct fl_flow_mask *newmask;
2157         int ret = 0;
2158
2159         rcu_read_lock();
2160
2161         /* Insert mask as temporary node to prevent concurrent creation of mask
2162          * with same key. Any concurrent lookups with same key will return
2163          * -EAGAIN because mask's refcnt is zero.
2164          */
2165         fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
2166                                                        &mask->ht_node,
2167                                                        mask_ht_params);
2168         if (!fnew->mask) {
2169                 rcu_read_unlock();
2170
2171                 if (fold) {
2172                         ret = -EINVAL;
2173                         goto errout_cleanup;
2174                 }
2175
2176                 newmask = fl_create_new_mask(head, mask);
2177                 if (IS_ERR(newmask)) {
2178                         ret = PTR_ERR(newmask);
2179                         goto errout_cleanup;
2180                 }
2181
2182                 fnew->mask = newmask;
2183                 return 0;
2184         } else if (IS_ERR(fnew->mask)) {
2185                 ret = PTR_ERR(fnew->mask);
2186         } else if (fold && fold->mask != fnew->mask) {
2187                 ret = -EINVAL;
2188         } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
2189                 /* Mask was deleted concurrently, try again */
2190                 ret = -EAGAIN;
2191         }
2192         rcu_read_unlock();
2193         return ret;
2194
2195 errout_cleanup:
2196         rhashtable_remove_fast(&head->ht, &mask->ht_node,
2197                                mask_ht_params);
2198         return ret;
2199 }
2200
2201 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask)
2202 {
2203         return mask->meta.l2_miss;
2204 }
2205
2206 static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
2207                                struct cls_fl_filter *fold,
2208                                bool *in_ht)
2209 {
2210         struct fl_flow_mask *mask = fnew->mask;
2211         int err;
2212
2213         err = rhashtable_lookup_insert_fast(&mask->ht,
2214                                             &fnew->ht_node,
2215                                             mask->filter_ht_params);
2216         if (err) {
2217                 *in_ht = false;
2218                 /* It is okay if filter with same key exists when
2219                  * overwriting.
2220                  */
2221                 return fold && err == -EEXIST ? 0 : err;
2222         }
2223
2224         *in_ht = true;
2225         return 0;
2226 }
2227
2228 static int fl_change(struct net *net, struct sk_buff *in_skb,
2229                      struct tcf_proto *tp, unsigned long base,
2230                      u32 handle, struct nlattr **tca,
2231                      void **arg, u32 flags,
2232                      struct netlink_ext_ack *extack)
2233 {
2234         struct cls_fl_head *head = fl_head_dereference(tp);
2235         bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL);
2236         struct cls_fl_filter *fold = *arg;
2237         bool bound_to_filter = false;
2238         struct cls_fl_filter *fnew;
2239         struct fl_flow_mask *mask;
2240         struct nlattr **tb;
2241         bool in_ht;
2242         int err;
2243
2244         if (!tca[TCA_OPTIONS]) {
2245                 err = -EINVAL;
2246                 goto errout_fold;
2247         }
2248
2249         mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
2250         if (!mask) {
2251                 err = -ENOBUFS;
2252                 goto errout_fold;
2253         }
2254
2255         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2256         if (!tb) {
2257                 err = -ENOBUFS;
2258                 goto errout_mask_alloc;
2259         }
2260
2261         err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2262                                           tca[TCA_OPTIONS], fl_policy, NULL);
2263         if (err < 0)
2264                 goto errout_tb;
2265
2266         if (fold && handle && fold->handle != handle) {
2267                 err = -EINVAL;
2268                 goto errout_tb;
2269         }
2270
2271         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
2272         if (!fnew) {
2273                 err = -ENOBUFS;
2274                 goto errout_tb;
2275         }
2276         INIT_LIST_HEAD(&fnew->hw_list);
2277         refcount_set(&fnew->refcnt, 1);
2278
2279         if (tb[TCA_FLOWER_FLAGS]) {
2280                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
2281
2282                 if (!tc_flags_valid(fnew->flags)) {
2283                         kfree(fnew);
2284                         err = -EINVAL;
2285                         goto errout_tb;
2286                 }
2287         }
2288
2289         if (!fold) {
2290                 spin_lock(&tp->lock);
2291                 if (!handle) {
2292                         handle = 1;
2293                         err = idr_alloc_u32(&head->handle_idr, NULL, &handle,
2294                                             INT_MAX, GFP_ATOMIC);
2295                 } else {
2296                         err = idr_alloc_u32(&head->handle_idr, NULL, &handle,
2297                                             handle, GFP_ATOMIC);
2298
2299                         /* Filter with specified handle was concurrently
2300                          * inserted after initial check in cls_api. This is not
2301                          * necessarily an error if NLM_F_EXCL is not set in
2302                          * message flags. Returning EAGAIN will cause cls_api to
2303                          * try to update concurrently inserted rule.
2304                          */
2305                         if (err == -ENOSPC)
2306                                 err = -EAGAIN;
2307                 }
2308                 spin_unlock(&tp->lock);
2309
2310                 if (err) {
2311                         kfree(fnew);
2312                         goto errout_tb;
2313                 }
2314         }
2315         fnew->handle = handle;
2316
2317         err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle,
2318                                !tc_skip_hw(fnew->flags));
2319         if (err < 0)
2320                 goto errout_idr;
2321
2322         err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE],
2323                                    &fnew->exts, flags, fnew->flags,
2324                                    extack);
2325         if (err < 0)
2326                 goto errout_idr;
2327
2328         if (tb[TCA_FLOWER_CLASSID]) {
2329                 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
2330                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2331                         rtnl_lock();
2332                 tcf_bind_filter(tp, &fnew->res, base);
2333                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2334                         rtnl_unlock();
2335                 bound_to_filter = true;
2336         }
2337
2338         err = fl_set_key(net, tb, &fnew->key, &mask->key, extack);
2339         if (err)
2340                 goto unbind_filter;
2341
2342         fl_mask_update_range(mask);
2343         fl_set_masked_key(&fnew->mkey, &fnew->key, mask);
2344
2345         if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) {
2346                 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
2347                 err = -EINVAL;
2348                 goto unbind_filter;
2349         }
2350
2351         /* Enable tc skb extension if filter matches on data extracted from
2352          * this extension.
2353          */
2354         if (fl_needs_tc_skb_ext(&mask->key)) {
2355                 fnew->needs_tc_skb_ext = 1;
2356                 tc_skb_ext_tc_enable();
2357         }
2358
2359         err = fl_check_assign_mask(head, fnew, fold, mask);
2360         if (err)
2361                 goto unbind_filter;
2362
2363         err = fl_ht_insert_unique(fnew, fold, &in_ht);
2364         if (err)
2365                 goto errout_mask;
2366
2367         if (!tc_skip_hw(fnew->flags)) {
2368                 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
2369                 if (err)
2370                         goto errout_ht;
2371         }
2372
2373         if (!tc_in_hw(fnew->flags))
2374                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
2375
2376         spin_lock(&tp->lock);
2377
2378         /* tp was deleted concurrently. -EAGAIN will cause caller to lookup
2379          * proto again or create new one, if necessary.
2380          */
2381         if (tp->deleting) {
2382                 err = -EAGAIN;
2383                 goto errout_hw;
2384         }
2385
2386         if (fold) {
2387                 /* Fold filter was deleted concurrently. Retry lookup. */
2388                 if (fold->deleted) {
2389                         err = -EAGAIN;
2390                         goto errout_hw;
2391                 }
2392
2393                 fnew->handle = handle;
2394
2395                 if (!in_ht) {
2396                         struct rhashtable_params params =
2397                                 fnew->mask->filter_ht_params;
2398
2399                         err = rhashtable_insert_fast(&fnew->mask->ht,
2400                                                      &fnew->ht_node,
2401                                                      params);
2402                         if (err)
2403                                 goto errout_hw;
2404                         in_ht = true;
2405                 }
2406
2407                 refcount_inc(&fnew->refcnt);
2408                 rhashtable_remove_fast(&fold->mask->ht,
2409                                        &fold->ht_node,
2410                                        fold->mask->filter_ht_params);
2411                 idr_replace(&head->handle_idr, fnew, fnew->handle);
2412                 list_replace_rcu(&fold->list, &fnew->list);
2413                 fold->deleted = true;
2414
2415                 spin_unlock(&tp->lock);
2416
2417                 fl_mask_put(head, fold->mask);
2418                 if (!tc_skip_hw(fold->flags))
2419                         fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
2420                 tcf_unbind_filter(tp, &fold->res);
2421                 /* Caller holds reference to fold, so refcnt is always > 0
2422                  * after this.
2423                  */
2424                 refcount_dec(&fold->refcnt);
2425                 __fl_put(fold);
2426         } else {
2427                 idr_replace(&head->handle_idr, fnew, fnew->handle);
2428
2429                 refcount_inc(&fnew->refcnt);
2430                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
2431                 spin_unlock(&tp->lock);
2432         }
2433
2434         *arg = fnew;
2435
2436         kfree(tb);
2437         tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2438         return 0;
2439
2440 errout_ht:
2441         spin_lock(&tp->lock);
2442 errout_hw:
2443         fnew->deleted = true;
2444         spin_unlock(&tp->lock);
2445         if (!tc_skip_hw(fnew->flags))
2446                 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
2447         if (in_ht)
2448                 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
2449                                        fnew->mask->filter_ht_params);
2450 errout_mask:
2451         fl_mask_put(head, fnew->mask);
2452
2453 unbind_filter:
2454         if (bound_to_filter) {
2455                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2456                         rtnl_lock();
2457                 tcf_unbind_filter(tp, &fnew->res);
2458                 if (flags & TCA_ACT_FLAGS_NO_RTNL)
2459                         rtnl_unlock();
2460         }
2461
2462 errout_idr:
2463         if (!fold)
2464                 idr_remove(&head->handle_idr, fnew->handle);
2465         __fl_put(fnew);
2466 errout_tb:
2467         kfree(tb);
2468 errout_mask_alloc:
2469         tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
2470 errout_fold:
2471         if (fold)
2472                 __fl_put(fold);
2473         return err;
2474 }
2475
2476 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
2477                      bool rtnl_held, struct netlink_ext_ack *extack)
2478 {
2479         struct cls_fl_head *head = fl_head_dereference(tp);
2480         struct cls_fl_filter *f = arg;
2481         bool last_on_mask;
2482         int err = 0;
2483
2484         err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
2485         *last = list_empty(&head->masks);
2486         __fl_put(f);
2487
2488         return err;
2489 }
2490
2491 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
2492                     bool rtnl_held)
2493 {
2494         struct cls_fl_head *head = fl_head_dereference(tp);
2495         unsigned long id = arg->cookie, tmp;
2496         struct cls_fl_filter *f;
2497
2498         arg->count = arg->skip;
2499
2500         rcu_read_lock();
2501         idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) {
2502                 /* don't return filters that are being deleted */
2503                 if (!f || !refcount_inc_not_zero(&f->refcnt))
2504                         continue;
2505                 rcu_read_unlock();
2506
2507                 if (arg->fn(tp, f, arg) < 0) {
2508                         __fl_put(f);
2509                         arg->stop = 1;
2510                         rcu_read_lock();
2511                         break;
2512                 }
2513                 __fl_put(f);
2514                 arg->count++;
2515                 rcu_read_lock();
2516         }
2517         rcu_read_unlock();
2518         arg->cookie = id;
2519 }
2520
2521 static struct cls_fl_filter *
2522 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
2523 {
2524         struct cls_fl_head *head = fl_head_dereference(tp);
2525
2526         spin_lock(&tp->lock);
2527         if (list_empty(&head->hw_filters)) {
2528                 spin_unlock(&tp->lock);
2529                 return NULL;
2530         }
2531
2532         if (!f)
2533                 f = list_entry(&head->hw_filters, struct cls_fl_filter,
2534                                hw_list);
2535         list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
2536                 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
2537                         spin_unlock(&tp->lock);
2538                         return f;
2539                 }
2540         }
2541
2542         spin_unlock(&tp->lock);
2543         return NULL;
2544 }
2545
2546 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
2547                         void *cb_priv, struct netlink_ext_ack *extack)
2548 {
2549         struct tcf_block *block = tp->chain->block;
2550         struct flow_cls_offload cls_flower = {};
2551         struct cls_fl_filter *f = NULL;
2552         int err;
2553
2554         /* hw_filters list can only be changed by hw offload functions after
2555          * obtaining rtnl lock. Make sure it is not changed while reoffload is
2556          * iterating it.
2557          */
2558         ASSERT_RTNL();
2559
2560         while ((f = fl_get_next_hw_filter(tp, f, add))) {
2561                 cls_flower.rule =
2562                         flow_rule_alloc(tcf_exts_num_actions(&f->exts));
2563                 if (!cls_flower.rule) {
2564                         __fl_put(f);
2565                         return -ENOMEM;
2566                 }
2567
2568                 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
2569                                            extack);
2570                 cls_flower.command = add ?
2571                         FLOW_CLS_REPLACE : FLOW_CLS_DESTROY;
2572                 cls_flower.cookie = (unsigned long)f;
2573                 cls_flower.rule->match.dissector = &f->mask->dissector;
2574                 cls_flower.rule->match.mask = &f->mask->key;
2575                 cls_flower.rule->match.key = &f->mkey;
2576
2577                 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts,
2578                                               cls_flower.common.extack);
2579                 if (err) {
2580                         kfree(cls_flower.rule);
2581                         if (tc_skip_sw(f->flags)) {
2582                                 __fl_put(f);
2583                                 return err;
2584                         }
2585                         goto next_flow;
2586                 }
2587
2588                 cls_flower.classid = f->res.classid;
2589
2590                 err = tc_setup_cb_reoffload(block, tp, add, cb,
2591                                             TC_SETUP_CLSFLOWER, &cls_flower,
2592                                             cb_priv, &f->flags,
2593                                             &f->in_hw_count);
2594                 tc_cleanup_offload_action(&cls_flower.rule->action);
2595                 kfree(cls_flower.rule);
2596
2597                 if (err) {
2598                         __fl_put(f);
2599                         return err;
2600                 }
2601 next_flow:
2602                 __fl_put(f);
2603         }
2604
2605         return 0;
2606 }
2607
2608 static void fl_hw_add(struct tcf_proto *tp, void *type_data)
2609 {
2610         struct flow_cls_offload *cls_flower = type_data;
2611         struct cls_fl_filter *f =
2612                 (struct cls_fl_filter *) cls_flower->cookie;
2613         struct cls_fl_head *head = fl_head_dereference(tp);
2614
2615         spin_lock(&tp->lock);
2616         list_add(&f->hw_list, &head->hw_filters);
2617         spin_unlock(&tp->lock);
2618 }
2619
2620 static void fl_hw_del(struct tcf_proto *tp, void *type_data)
2621 {
2622         struct flow_cls_offload *cls_flower = type_data;
2623         struct cls_fl_filter *f =
2624                 (struct cls_fl_filter *) cls_flower->cookie;
2625
2626         spin_lock(&tp->lock);
2627         if (!list_empty(&f->hw_list))
2628                 list_del_init(&f->hw_list);
2629         spin_unlock(&tp->lock);
2630 }
2631
2632 static int fl_hw_create_tmplt(struct tcf_chain *chain,
2633                               struct fl_flow_tmplt *tmplt)
2634 {
2635         struct flow_cls_offload cls_flower = {};
2636         struct tcf_block *block = chain->block;
2637
2638         cls_flower.rule = flow_rule_alloc(0);
2639         if (!cls_flower.rule)
2640                 return -ENOMEM;
2641
2642         cls_flower.common.chain_index = chain->index;
2643         cls_flower.command = FLOW_CLS_TMPLT_CREATE;
2644         cls_flower.cookie = (unsigned long) tmplt;
2645         cls_flower.rule->match.dissector = &tmplt->dissector;
2646         cls_flower.rule->match.mask = &tmplt->mask;
2647         cls_flower.rule->match.key = &tmplt->dummy_key;
2648
2649         /* We don't care if driver (any of them) fails to handle this
2650          * call. It serves just as a hint for it.
2651          */
2652         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2653         kfree(cls_flower.rule);
2654
2655         return 0;
2656 }
2657
2658 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
2659                                 struct fl_flow_tmplt *tmplt)
2660 {
2661         struct flow_cls_offload cls_flower = {};
2662         struct tcf_block *block = chain->block;
2663
2664         cls_flower.common.chain_index = chain->index;
2665         cls_flower.command = FLOW_CLS_TMPLT_DESTROY;
2666         cls_flower.cookie = (unsigned long) tmplt;
2667
2668         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true);
2669 }
2670
2671 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
2672                              struct nlattr **tca,
2673                              struct netlink_ext_ack *extack)
2674 {
2675         struct fl_flow_tmplt *tmplt;
2676         struct nlattr **tb;
2677         int err;
2678
2679         if (!tca[TCA_OPTIONS])
2680                 return ERR_PTR(-EINVAL);
2681
2682         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
2683         if (!tb)
2684                 return ERR_PTR(-ENOBUFS);
2685         err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
2686                                           tca[TCA_OPTIONS], fl_policy, NULL);
2687         if (err)
2688                 goto errout_tb;
2689
2690         tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
2691         if (!tmplt) {
2692                 err = -ENOMEM;
2693                 goto errout_tb;
2694         }
2695         tmplt->chain = chain;
2696         err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
2697         if (err)
2698                 goto errout_tmplt;
2699
2700         fl_init_dissector(&tmplt->dissector, &tmplt->mask);
2701
2702         err = fl_hw_create_tmplt(chain, tmplt);
2703         if (err)
2704                 goto errout_tmplt;
2705
2706         kfree(tb);
2707         return tmplt;
2708
2709 errout_tmplt:
2710         kfree(tmplt);
2711 errout_tb:
2712         kfree(tb);
2713         return ERR_PTR(err);
2714 }
2715
2716 static void fl_tmplt_destroy(void *tmplt_priv)
2717 {
2718         struct fl_flow_tmplt *tmplt = tmplt_priv;
2719
2720         fl_hw_destroy_tmplt(tmplt->chain, tmplt);
2721         kfree(tmplt);
2722 }
2723
2724 static void fl_tmplt_reoffload(struct tcf_chain *chain, bool add,
2725                                flow_setup_cb_t *cb, void *cb_priv)
2726 {
2727         struct fl_flow_tmplt *tmplt = chain->tmplt_priv;
2728         struct flow_cls_offload cls_flower = {};
2729
2730         cls_flower.rule = flow_rule_alloc(0);
2731         if (!cls_flower.rule)
2732                 return;
2733
2734         cls_flower.common.chain_index = chain->index;
2735         cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE :
2736                                    FLOW_CLS_TMPLT_DESTROY;
2737         cls_flower.cookie = (unsigned long) tmplt;
2738         cls_flower.rule->match.dissector = &tmplt->dissector;
2739         cls_flower.rule->match.mask = &tmplt->mask;
2740         cls_flower.rule->match.key = &tmplt->dummy_key;
2741
2742         cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);
2743         kfree(cls_flower.rule);
2744 }
2745
2746 static int fl_dump_key_val(struct sk_buff *skb,
2747                            void *val, int val_type,
2748                            void *mask, int mask_type, int len)
2749 {
2750         int err;
2751
2752         if (!memchr_inv(mask, 0, len))
2753                 return 0;
2754         err = nla_put(skb, val_type, len, val);
2755         if (err)
2756                 return err;
2757         if (mask_type != TCA_FLOWER_UNSPEC) {
2758                 err = nla_put(skb, mask_type, len, mask);
2759                 if (err)
2760                         return err;
2761         }
2762         return 0;
2763 }
2764
2765 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
2766                                   struct fl_flow_key *mask)
2767 {
2768         if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst,
2769                             TCA_FLOWER_KEY_PORT_DST_MIN,
2770                             &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC,
2771                             sizeof(key->tp_range.tp_min.dst)) ||
2772             fl_dump_key_val(skb, &key->tp_range.tp_max.dst,
2773                             TCA_FLOWER_KEY_PORT_DST_MAX,
2774                             &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC,
2775                             sizeof(key->tp_range.tp_max.dst)) ||
2776             fl_dump_key_val(skb, &key->tp_range.tp_min.src,
2777                             TCA_FLOWER_KEY_PORT_SRC_MIN,
2778                             &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC,
2779                             sizeof(key->tp_range.tp_min.src)) ||
2780             fl_dump_key_val(skb, &key->tp_range.tp_max.src,
2781                             TCA_FLOWER_KEY_PORT_SRC_MAX,
2782                             &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC,
2783                             sizeof(key->tp_range.tp_max.src)))
2784                 return -1;
2785
2786         return 0;
2787 }
2788
2789 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb,
2790                                     struct flow_dissector_key_mpls *mpls_key,
2791                                     struct flow_dissector_key_mpls *mpls_mask,
2792                                     u8 lse_index)
2793 {
2794         struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index];
2795         struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index];
2796         int err;
2797
2798         err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH,
2799                          lse_index + 1);
2800         if (err)
2801                 return err;
2802
2803         if (lse_mask->mpls_ttl) {
2804                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL,
2805                                  lse_key->mpls_ttl);
2806                 if (err)
2807                         return err;
2808         }
2809         if (lse_mask->mpls_bos) {
2810                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS,
2811                                  lse_key->mpls_bos);
2812                 if (err)
2813                         return err;
2814         }
2815         if (lse_mask->mpls_tc) {
2816                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC,
2817                                  lse_key->mpls_tc);
2818                 if (err)
2819                         return err;
2820         }
2821         if (lse_mask->mpls_label) {
2822                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL,
2823                                   lse_key->mpls_label);
2824                 if (err)
2825                         return err;
2826         }
2827
2828         return 0;
2829 }
2830
2831 static int fl_dump_key_mpls_opts(struct sk_buff *skb,
2832                                  struct flow_dissector_key_mpls *mpls_key,
2833                                  struct flow_dissector_key_mpls *mpls_mask)
2834 {
2835         struct nlattr *opts;
2836         struct nlattr *lse;
2837         u8 lse_index;
2838         int err;
2839
2840         opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS);
2841         if (!opts)
2842                 return -EMSGSIZE;
2843
2844         for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) {
2845                 if (!(mpls_mask->used_lses & 1 << lse_index))
2846                         continue;
2847
2848                 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE);
2849                 if (!lse) {
2850                         err = -EMSGSIZE;
2851                         goto err_opts;
2852                 }
2853
2854                 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask,
2855                                                lse_index);
2856                 if (err)
2857                         goto err_opts_lse;
2858                 nla_nest_end(skb, lse);
2859         }
2860         nla_nest_end(skb, opts);
2861
2862         return 0;
2863
2864 err_opts_lse:
2865         nla_nest_cancel(skb, lse);
2866 err_opts:
2867         nla_nest_cancel(skb, opts);
2868
2869         return err;
2870 }
2871
2872 static int fl_dump_key_mpls(struct sk_buff *skb,
2873                             struct flow_dissector_key_mpls *mpls_key,
2874                             struct flow_dissector_key_mpls *mpls_mask)
2875 {
2876         struct flow_dissector_mpls_lse *lse_mask;
2877         struct flow_dissector_mpls_lse *lse_key;
2878         int err;
2879
2880         if (!mpls_mask->used_lses)
2881                 return 0;
2882
2883         lse_mask = &mpls_mask->ls[0];
2884         lse_key = &mpls_key->ls[0];
2885
2886         /* For backward compatibility, don't use the MPLS nested attributes if
2887          * the rule can be expressed using the old attributes.
2888          */
2889         if (mpls_mask->used_lses & ~1 ||
2890             (!lse_mask->mpls_ttl && !lse_mask->mpls_bos &&
2891              !lse_mask->mpls_tc && !lse_mask->mpls_label))
2892                 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask);
2893
2894         if (lse_mask->mpls_ttl) {
2895                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
2896                                  lse_key->mpls_ttl);
2897                 if (err)
2898                         return err;
2899         }
2900         if (lse_mask->mpls_tc) {
2901                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
2902                                  lse_key->mpls_tc);
2903                 if (err)
2904                         return err;
2905         }
2906         if (lse_mask->mpls_label) {
2907                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
2908                                   lse_key->mpls_label);
2909                 if (err)
2910                         return err;
2911         }
2912         if (lse_mask->mpls_bos) {
2913                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
2914                                  lse_key->mpls_bos);
2915                 if (err)
2916                         return err;
2917         }
2918         return 0;
2919 }
2920
2921 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
2922                           struct flow_dissector_key_ip *key,
2923                           struct flow_dissector_key_ip *mask)
2924 {
2925         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
2926         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
2927         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
2928         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
2929
2930         if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
2931             fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
2932                 return -1;
2933
2934         return 0;
2935 }
2936
2937 static int fl_dump_key_vlan(struct sk_buff *skb,
2938                             int vlan_id_key, int vlan_prio_key,
2939                             struct flow_dissector_key_vlan *vlan_key,
2940                             struct flow_dissector_key_vlan *vlan_mask)
2941 {
2942         int err;
2943
2944         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
2945                 return 0;
2946         if (vlan_mask->vlan_id) {
2947                 err = nla_put_u16(skb, vlan_id_key,
2948                                   vlan_key->vlan_id);
2949                 if (err)
2950                         return err;
2951         }
2952         if (vlan_mask->vlan_priority) {
2953                 err = nla_put_u8(skb, vlan_prio_key,
2954                                  vlan_key->vlan_priority);
2955                 if (err)
2956                         return err;
2957         }
2958         return 0;
2959 }
2960
2961 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
2962                             u32 *flower_key, u32 *flower_mask,
2963                             u32 flower_flag_bit, u32 dissector_flag_bit)
2964 {
2965         if (dissector_mask & dissector_flag_bit) {
2966                 *flower_mask |= flower_flag_bit;
2967                 if (dissector_key & dissector_flag_bit)
2968                         *flower_key |= flower_flag_bit;
2969         }
2970 }
2971
2972 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
2973 {
2974         u32 key, mask;
2975         __be32 _key, _mask;
2976         int err;
2977
2978         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
2979                 return 0;
2980
2981         key = 0;
2982         mask = 0;
2983
2984         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2985                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
2986         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
2987                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
2988                         FLOW_DIS_FIRST_FRAG);
2989
2990         _key = cpu_to_be32(key);
2991         _mask = cpu_to_be32(mask);
2992
2993         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
2994         if (err)
2995                 return err;
2996
2997         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
2998 }
2999
3000 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
3001                                   struct flow_dissector_key_enc_opts *enc_opts)
3002 {
3003         struct geneve_opt *opt;
3004         struct nlattr *nest;
3005         int opt_off = 0;
3006
3007         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
3008         if (!nest)
3009                 goto nla_put_failure;
3010
3011         while (enc_opts->len > opt_off) {
3012                 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
3013
3014                 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
3015                                  opt->opt_class))
3016                         goto nla_put_failure;
3017                 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
3018                                opt->type))
3019                         goto nla_put_failure;
3020                 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
3021                             opt->length * 4, opt->opt_data))
3022                         goto nla_put_failure;
3023
3024                 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
3025         }
3026         nla_nest_end(skb, nest);
3027         return 0;
3028
3029 nla_put_failure:
3030         nla_nest_cancel(skb, nest);
3031         return -EMSGSIZE;
3032 }
3033
3034 static int fl_dump_key_vxlan_opt(struct sk_buff *skb,
3035                                  struct flow_dissector_key_enc_opts *enc_opts)
3036 {
3037         struct vxlan_metadata *md;
3038         struct nlattr *nest;
3039
3040         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN);
3041         if (!nest)
3042                 goto nla_put_failure;
3043
3044         md = (struct vxlan_metadata *)&enc_opts->data[0];
3045         if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp))
3046                 goto nla_put_failure;
3047
3048         nla_nest_end(skb, nest);
3049         return 0;
3050
3051 nla_put_failure:
3052         nla_nest_cancel(skb, nest);
3053         return -EMSGSIZE;
3054 }
3055
3056 static int fl_dump_key_erspan_opt(struct sk_buff *skb,
3057                                   struct flow_dissector_key_enc_opts *enc_opts)
3058 {
3059         struct erspan_metadata *md;
3060         struct nlattr *nest;
3061
3062         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN);
3063         if (!nest)
3064                 goto nla_put_failure;
3065
3066         md = (struct erspan_metadata *)&enc_opts->data[0];
3067         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version))
3068                 goto nla_put_failure;
3069
3070         if (md->version == 1 &&
3071             nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index))
3072                 goto nla_put_failure;
3073
3074         if (md->version == 2 &&
3075             (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR,
3076                         md->u.md2.dir) ||
3077              nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID,
3078                         get_hwid(&md->u.md2))))
3079                 goto nla_put_failure;
3080
3081         nla_nest_end(skb, nest);
3082         return 0;
3083
3084 nla_put_failure:
3085         nla_nest_cancel(skb, nest);
3086         return -EMSGSIZE;
3087 }
3088
3089 static int fl_dump_key_gtp_opt(struct sk_buff *skb,
3090                                struct flow_dissector_key_enc_opts *enc_opts)
3091
3092 {
3093         struct gtp_pdu_session_info *session_info;
3094         struct nlattr *nest;
3095
3096         nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP);
3097         if (!nest)
3098                 goto nla_put_failure;
3099
3100         session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0];
3101
3102         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE,
3103                        session_info->pdu_type))
3104                 goto nla_put_failure;
3105
3106         if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi))
3107                 goto nla_put_failure;
3108
3109         nla_nest_end(skb, nest);
3110         return 0;
3111
3112 nla_put_failure:
3113         nla_nest_cancel(skb, nest);
3114         return -EMSGSIZE;
3115 }
3116
3117 static int fl_dump_key_ct(struct sk_buff *skb,
3118                           struct flow_dissector_key_ct *key,
3119                           struct flow_dissector_key_ct *mask)
3120 {
3121         if (IS_ENABLED(CONFIG_NF_CONNTRACK) &&
3122             fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE,
3123                             &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK,
3124                             sizeof(key->ct_state)))
3125                 goto nla_put_failure;
3126
3127         if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
3128             fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE,
3129                             &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK,
3130                             sizeof(key->ct_zone)))
3131                 goto nla_put_failure;
3132
3133         if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
3134             fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK,
3135                             &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK,
3136                             sizeof(key->ct_mark)))
3137                 goto nla_put_failure;
3138
3139         if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
3140             fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS,
3141                             &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK,
3142                             sizeof(key->ct_labels)))
3143                 goto nla_put_failure;
3144
3145         return 0;
3146
3147 nla_put_failure:
3148         return -EMSGSIZE;
3149 }
3150
3151 static int fl_dump_key_cfm(struct sk_buff *skb,
3152                            struct flow_dissector_key_cfm *key,
3153                            struct flow_dissector_key_cfm *mask)
3154 {
3155         struct nlattr *opts;
3156         int err;
3157         u8 mdl;
3158
3159         if (!memchr_inv(mask, 0, sizeof(*mask)))
3160                 return 0;
3161
3162         opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM);
3163         if (!opts)
3164                 return -EMSGSIZE;
3165
3166         if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) {
3167                 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver);
3168                 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl);
3169                 if (err)
3170                         goto err_cfm_opts;
3171         }
3172
3173         if (mask->opcode) {
3174                 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode);
3175                 if (err)
3176                         goto err_cfm_opts;
3177         }
3178
3179         nla_nest_end(skb, opts);
3180
3181         return 0;
3182
3183 err_cfm_opts:
3184         nla_nest_cancel(skb, opts);
3185         return err;
3186 }
3187
3188 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
3189                                struct flow_dissector_key_enc_opts *enc_opts)
3190 {
3191         struct nlattr *nest;
3192         int err;
3193
3194         if (!enc_opts->len)
3195                 return 0;
3196
3197         nest = nla_nest_start_noflag(skb, enc_opt_type);
3198         if (!nest)
3199                 goto nla_put_failure;
3200
3201         switch (enc_opts->dst_opt_type) {
3202         case TUNNEL_GENEVE_OPT:
3203                 err = fl_dump_key_geneve_opt(skb, enc_opts);
3204                 if (err)
3205                         goto nla_put_failure;
3206                 break;
3207         case TUNNEL_VXLAN_OPT:
3208                 err = fl_dump_key_vxlan_opt(skb, enc_opts);
3209                 if (err)
3210                         goto nla_put_failure;
3211                 break;
3212         case TUNNEL_ERSPAN_OPT:
3213                 err = fl_dump_key_erspan_opt(skb, enc_opts);
3214                 if (err)
3215                         goto nla_put_failure;
3216                 break;
3217         case TUNNEL_GTP_OPT:
3218                 err = fl_dump_key_gtp_opt(skb, enc_opts);
3219                 if (err)
3220                         goto nla_put_failure;
3221                 break;
3222         default:
3223                 goto nla_put_failure;
3224         }
3225         nla_nest_end(skb, nest);
3226         return 0;
3227
3228 nla_put_failure:
3229         nla_nest_cancel(skb, nest);
3230         return -EMSGSIZE;
3231 }
3232
3233 static int fl_dump_key_enc_opt(struct sk_buff *skb,
3234                                struct flow_dissector_key_enc_opts *key_opts,
3235                                struct flow_dissector_key_enc_opts *msk_opts)
3236 {
3237         int err;
3238
3239         err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
3240         if (err)
3241                 return err;
3242
3243         return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
3244 }
3245
3246 static int fl_dump_key(struct sk_buff *skb, struct net *net,
3247                        struct fl_flow_key *key, struct fl_flow_key *mask)
3248 {
3249         if (mask->meta.ingress_ifindex) {
3250                 struct net_device *dev;
3251
3252                 dev = __dev_get_by_index(net, key->meta.ingress_ifindex);
3253                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
3254                         goto nla_put_failure;
3255         }
3256
3257         if (fl_dump_key_val(skb, &key->meta.l2_miss,
3258                             TCA_FLOWER_L2_MISS, &mask->meta.l2_miss,
3259                             TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss)))
3260                 goto nla_put_failure;
3261
3262         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
3263                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
3264                             sizeof(key->eth.dst)) ||
3265             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
3266                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
3267                             sizeof(key->eth.src)) ||
3268             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
3269                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
3270                             sizeof(key->basic.n_proto)))
3271                 goto nla_put_failure;
3272
3273         if (mask->num_of_vlans.num_of_vlans) {
3274                 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans))
3275                         goto nla_put_failure;
3276         }
3277
3278         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
3279                 goto nla_put_failure;
3280
3281         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
3282                              TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
3283                 goto nla_put_failure;
3284
3285         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
3286                              TCA_FLOWER_KEY_CVLAN_PRIO,
3287                              &key->cvlan, &mask->cvlan) ||
3288             (mask->cvlan.vlan_tpid &&
3289              nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
3290                           key->cvlan.vlan_tpid)))
3291                 goto nla_put_failure;
3292
3293         if (mask->basic.n_proto) {
3294                 if (mask->cvlan.vlan_eth_type) {
3295                         if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
3296                                          key->basic.n_proto))
3297                                 goto nla_put_failure;
3298                 } else if (mask->vlan.vlan_eth_type) {
3299                         if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
3300                                          key->vlan.vlan_eth_type))
3301                                 goto nla_put_failure;
3302                 }
3303         }
3304
3305         if ((key->basic.n_proto == htons(ETH_P_IP) ||
3306              key->basic.n_proto == htons(ETH_P_IPV6)) &&
3307             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
3308                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
3309                             sizeof(key->basic.ip_proto)) ||
3310             fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
3311                 goto nla_put_failure;
3312
3313         if (mask->pppoe.session_id) {
3314                 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID,
3315                                  key->pppoe.session_id))
3316                         goto nla_put_failure;
3317         }
3318         if (mask->basic.n_proto && mask->pppoe.ppp_proto) {
3319                 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO,
3320                                  key->pppoe.ppp_proto))
3321                         goto nla_put_failure;
3322         }
3323
3324         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3325             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
3326                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
3327                              sizeof(key->ipv4.src)) ||
3328              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
3329                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
3330                              sizeof(key->ipv4.dst))))
3331                 goto nla_put_failure;
3332         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3333                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
3334                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
3335                                   sizeof(key->ipv6.src)) ||
3336                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
3337                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
3338                                   sizeof(key->ipv6.dst))))
3339                 goto nla_put_failure;
3340
3341         if (key->basic.ip_proto == IPPROTO_TCP &&
3342             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
3343                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
3344                              sizeof(key->tp.src)) ||
3345              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
3346                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
3347                              sizeof(key->tp.dst)) ||
3348              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
3349                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
3350                              sizeof(key->tcp.flags))))
3351                 goto nla_put_failure;
3352         else if (key->basic.ip_proto == IPPROTO_UDP &&
3353                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
3354                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
3355                                   sizeof(key->tp.src)) ||
3356                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
3357                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
3358                                   sizeof(key->tp.dst))))
3359                 goto nla_put_failure;
3360         else if (key->basic.ip_proto == IPPROTO_SCTP &&
3361                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
3362                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
3363                                   sizeof(key->tp.src)) ||
3364                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
3365                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
3366                                   sizeof(key->tp.dst))))
3367                 goto nla_put_failure;
3368         else if (key->basic.n_proto == htons(ETH_P_IP) &&
3369                  key->basic.ip_proto == IPPROTO_ICMP &&
3370                  (fl_dump_key_val(skb, &key->icmp.type,
3371                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
3372                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
3373                                   sizeof(key->icmp.type)) ||
3374                   fl_dump_key_val(skb, &key->icmp.code,
3375                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
3376                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
3377                                   sizeof(key->icmp.code))))
3378                 goto nla_put_failure;
3379         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
3380                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
3381                  (fl_dump_key_val(skb, &key->icmp.type,
3382                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
3383                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
3384                                   sizeof(key->icmp.type)) ||
3385                   fl_dump_key_val(skb, &key->icmp.code,
3386                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
3387                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
3388                                   sizeof(key->icmp.code))))
3389                 goto nla_put_failure;
3390         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
3391                   key->basic.n_proto == htons(ETH_P_RARP)) &&
3392                  (fl_dump_key_val(skb, &key->arp.sip,
3393                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
3394                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
3395                                   sizeof(key->arp.sip)) ||
3396                   fl_dump_key_val(skb, &key->arp.tip,
3397                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
3398                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
3399                                   sizeof(key->arp.tip)) ||
3400                   fl_dump_key_val(skb, &key->arp.op,
3401                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
3402                                   TCA_FLOWER_KEY_ARP_OP_MASK,
3403                                   sizeof(key->arp.op)) ||
3404                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
3405                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
3406                                   sizeof(key->arp.sha)) ||
3407                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
3408                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
3409                                   sizeof(key->arp.tha))))
3410                 goto nla_put_failure;
3411         else if (key->basic.ip_proto == IPPROTO_L2TP &&
3412                  fl_dump_key_val(skb, &key->l2tpv3.session_id,
3413                                  TCA_FLOWER_KEY_L2TPV3_SID,
3414                                  &mask->l2tpv3.session_id,
3415                                  TCA_FLOWER_UNSPEC,
3416                                  sizeof(key->l2tpv3.session_id)))
3417                 goto nla_put_failure;
3418
3419         if (key->ipsec.spi &&
3420             fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI,
3421                             &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK,
3422                             sizeof(key->ipsec.spi)))
3423                 goto nla_put_failure;
3424
3425         if ((key->basic.ip_proto == IPPROTO_TCP ||
3426              key->basic.ip_proto == IPPROTO_UDP ||
3427              key->basic.ip_proto == IPPROTO_SCTP) &&
3428              fl_dump_key_port_range(skb, key, mask))
3429                 goto nla_put_failure;
3430
3431         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
3432             (fl_dump_key_val(skb, &key->enc_ipv4.src,
3433                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
3434                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
3435                             sizeof(key->enc_ipv4.src)) ||
3436              fl_dump_key_val(skb, &key->enc_ipv4.dst,
3437                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
3438                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
3439                              sizeof(key->enc_ipv4.dst))))
3440                 goto nla_put_failure;
3441         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
3442                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
3443                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
3444                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
3445                             sizeof(key->enc_ipv6.src)) ||
3446                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
3447                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
3448                                  &mask->enc_ipv6.dst,
3449                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
3450                             sizeof(key->enc_ipv6.dst))))
3451                 goto nla_put_failure;
3452
3453         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
3454                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
3455                             sizeof(key->enc_key_id)) ||
3456             fl_dump_key_val(skb, &key->enc_tp.src,
3457                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
3458                             &mask->enc_tp.src,
3459                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
3460                             sizeof(key->enc_tp.src)) ||
3461             fl_dump_key_val(skb, &key->enc_tp.dst,
3462                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
3463                             &mask->enc_tp.dst,
3464                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
3465                             sizeof(key->enc_tp.dst)) ||
3466             fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
3467             fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
3468                 goto nla_put_failure;
3469
3470         if (fl_dump_key_ct(skb, &key->ct, &mask->ct))
3471                 goto nla_put_failure;
3472
3473         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
3474                 goto nla_put_failure;
3475
3476         if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH,
3477                              &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK,
3478                              sizeof(key->hash.hash)))
3479                 goto nla_put_failure;
3480
3481         if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm))
3482                 goto nla_put_failure;
3483
3484         return 0;
3485
3486 nla_put_failure:
3487         return -EMSGSIZE;
3488 }
3489
3490 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
3491                    struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3492 {
3493         struct cls_fl_filter *f = fh;
3494         struct nlattr *nest;
3495         struct fl_flow_key *key, *mask;
3496         bool skip_hw;
3497
3498         if (!f)
3499                 return skb->len;
3500
3501         t->tcm_handle = f->handle;
3502
3503         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3504         if (!nest)
3505                 goto nla_put_failure;
3506
3507         spin_lock(&tp->lock);
3508
3509         if (f->res.classid &&
3510             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
3511                 goto nla_put_failure_locked;
3512
3513         key = &f->key;
3514         mask = &f->mask->key;
3515         skip_hw = tc_skip_hw(f->flags);
3516
3517         if (fl_dump_key(skb, net, key, mask))
3518                 goto nla_put_failure_locked;
3519
3520         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3521                 goto nla_put_failure_locked;
3522
3523         spin_unlock(&tp->lock);
3524
3525         if (!skip_hw)
3526                 fl_hw_update_stats(tp, f, rtnl_held);
3527
3528         if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
3529                 goto nla_put_failure;
3530
3531         if (tcf_exts_dump(skb, &f->exts))
3532                 goto nla_put_failure;
3533
3534         nla_nest_end(skb, nest);
3535
3536         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
3537                 goto nla_put_failure;
3538
3539         return skb->len;
3540
3541 nla_put_failure_locked:
3542         spin_unlock(&tp->lock);
3543 nla_put_failure:
3544         nla_nest_cancel(skb, nest);
3545         return -1;
3546 }
3547
3548 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh,
3549                          struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
3550 {
3551         struct cls_fl_filter *f = fh;
3552         struct nlattr *nest;
3553         bool skip_hw;
3554
3555         if (!f)
3556                 return skb->len;
3557
3558         t->tcm_handle = f->handle;
3559
3560         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3561         if (!nest)
3562                 goto nla_put_failure;
3563
3564         spin_lock(&tp->lock);
3565
3566         skip_hw = tc_skip_hw(f->flags);
3567
3568         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
3569                 goto nla_put_failure_locked;
3570
3571         spin_unlock(&tp->lock);
3572
3573         if (!skip_hw)
3574                 fl_hw_update_stats(tp, f, rtnl_held);
3575
3576         if (tcf_exts_terse_dump(skb, &f->exts))
3577                 goto nla_put_failure;
3578
3579         nla_nest_end(skb, nest);
3580
3581         return skb->len;
3582
3583 nla_put_failure_locked:
3584         spin_unlock(&tp->lock);
3585 nla_put_failure:
3586         nla_nest_cancel(skb, nest);
3587         return -1;
3588 }
3589
3590 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
3591 {
3592         struct fl_flow_tmplt *tmplt = tmplt_priv;
3593         struct fl_flow_key *key, *mask;
3594         struct nlattr *nest;
3595
3596         nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
3597         if (!nest)
3598                 goto nla_put_failure;
3599
3600         key = &tmplt->dummy_key;
3601         mask = &tmplt->mask;
3602
3603         if (fl_dump_key(skb, net, key, mask))
3604                 goto nla_put_failure;
3605
3606         nla_nest_end(skb, nest);
3607
3608         return skb->len;
3609
3610 nla_put_failure:
3611         nla_nest_cancel(skb, nest);
3612         return -EMSGSIZE;
3613 }
3614
3615 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
3616                           unsigned long base)
3617 {
3618         struct cls_fl_filter *f = fh;
3619
3620         tc_cls_bind_class(classid, cl, q, &f->res, base);
3621 }
3622
3623 static bool fl_delete_empty(struct tcf_proto *tp)
3624 {
3625         struct cls_fl_head *head = fl_head_dereference(tp);
3626
3627         spin_lock(&tp->lock);
3628         tp->deleting = idr_is_empty(&head->handle_idr);
3629         spin_unlock(&tp->lock);
3630
3631         return tp->deleting;
3632 }
3633
3634 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
3635         .kind           = "flower",
3636         .classify       = fl_classify,
3637         .init           = fl_init,
3638         .destroy        = fl_destroy,
3639         .get            = fl_get,
3640         .put            = fl_put,
3641         .change         = fl_change,
3642         .delete         = fl_delete,
3643         .delete_empty   = fl_delete_empty,
3644         .walk           = fl_walk,
3645         .reoffload      = fl_reoffload,
3646         .hw_add         = fl_hw_add,
3647         .hw_del         = fl_hw_del,
3648         .dump           = fl_dump,
3649         .terse_dump     = fl_terse_dump,
3650         .bind_class     = fl_bind_class,
3651         .tmplt_create   = fl_tmplt_create,
3652         .tmplt_destroy  = fl_tmplt_destroy,
3653         .tmplt_reoffload = fl_tmplt_reoffload,
3654         .tmplt_dump     = fl_tmplt_dump,
3655         .get_exts       = fl_get_exts,
3656         .owner          = THIS_MODULE,
3657         .flags          = TCF_PROTO_OPS_DOIT_UNLOCKED,
3658 };
3659
3660 static int __init cls_fl_init(void)
3661 {
3662         return register_tcf_proto_ops(&cls_fl_ops);
3663 }
3664
3665 static void __exit cls_fl_exit(void)
3666 {
3667         unregister_tcf_proto_ops(&cls_fl_ops);
3668 }
3669
3670 module_init(cls_fl_init);
3671 module_exit(cls_fl_exit);
3672
3673 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
3674 MODULE_DESCRIPTION("Flower classifier");
3675 MODULE_LICENSE("GPL v2");