include/net/pkt_cls.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NET_PKT_CLS_H
   3 #define __NET_PKT_CLS_H
   4
   5 #include <linux/pkt_cls.h>
   6 #include <linux/workqueue.h>
   7 #include <net/sch_generic.h>
   8 #include <net/act_api.h>
   9
  10 /* Basic packet classifier frontend definitions. */
  11
  12 struct tcf_walker {
  13         int     stop;
  14         int     skip;
  15         int     count;
  16         int     (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
  17 };
  18
  19 int register_tcf_proto_ops(struct tcf_proto_ops *ops);
  20 int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
  21
  22 enum tcf_block_binder_type {
  23         TCF_BLOCK_BINDER_TYPE_UNSPEC,
  24         TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
  25         TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
  26 };
  27
  28 struct tcf_block_ext_info {
  29         enum tcf_block_binder_type binder_type;
  30         tcf_chain_head_change_t *chain_head_change;
  31         void *chain_head_change_priv;
  32         u32 block_index;
  33 };
  34
  35 struct tcf_block_cb;
  36 bool tcf_queue_work(struct work_struct *work);
  37
  38 #ifdef CONFIG_NET_CLS
  39 struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,
  40                                 bool create);
  41 void tcf_chain_put(struct tcf_chain *chain);
  42 void tcf_block_netif_keep_dst(struct tcf_block *block);
  43 int tcf_block_get(struct tcf_block **p_block,
  44                   struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
  45                   struct netlink_ext_ack *extack);
  46 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
  47                       struct tcf_block_ext_info *ei,
  48                       struct netlink_ext_ack *extack);
  49 void tcf_block_put(struct tcf_block *block);
  50 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
  51                        struct tcf_block_ext_info *ei);
  52
  53 static inline bool tcf_block_shared(struct tcf_block *block)
  54 {
  55         return block->index;
  56 }
  57
  58 static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
  59 {
  60         WARN_ON(tcf_block_shared(block));
  61         return block->q;
  62 }
  63
  64 static inline struct net_device *tcf_block_dev(struct tcf_block *block)
  65 {
  66         return tcf_block_q(block)->dev_queue->dev;
  67 }
  68
  69 void *tcf_block_cb_priv(struct tcf_block_cb *block_cb);
  70 struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
  71                                          tc_setup_cb_t *cb, void *cb_ident);
  72 void tcf_block_cb_incref(struct tcf_block_cb *block_cb);
  73 unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb);
  74 struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
  75                                              tc_setup_cb_t *cb, void *cb_ident,
  76                                              void *cb_priv);
  77 int tcf_block_cb_register(struct tcf_block *block,
  78                           tc_setup_cb_t *cb, void *cb_ident,
  79                           void *cb_priv);
  80 void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb);
  81 void tcf_block_cb_unregister(struct tcf_block *block,
  82                              tc_setup_cb_t *cb, void *cb_ident);
  83
  84 int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
  85                  struct tcf_result *res, bool compat_mode);
  86
  87 #else
  88 static inline
  89 int tcf_block_get(struct tcf_block **p_block,
  90                   struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
  91                   struct netlink_ext_ack *extack)
  92 {
  93         return 0;
  94 }
  95
  96 static inline
  97 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
  98                       struct tcf_block_ext_info *ei,
  99                       struct netlink_ext_ack *extack)
 100 {
 101         return 0;
 102 }
 103
 104 static inline void tcf_block_put(struct tcf_block *block)
 105 {
 106 }
 107
 108 static inline
 109 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
 110                        struct tcf_block_ext_info *ei)
 111 {
 112 }
 113
 114 static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
 115 {
 116         return NULL;
 117 }
 118
 119 static inline struct net_device *tcf_block_dev(struct tcf_block *block)
 120 {
 121         return NULL;
 122 }
 123
 124 static inline
 125 int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb,
 126                                void *cb_priv)
 127 {
 128         return 0;
 129 }
 130
 131 static inline
 132 void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb,
 133                                   void *cb_priv)
 134 {
 135 }
 136
 137 static inline
 138 void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
 139 {
 140         return NULL;
 141 }
 142
 143 static inline
 144 struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
 145                                          tc_setup_cb_t *cb, void *cb_ident)
 146 {
 147         return NULL;
 148 }
 149
 150 static inline
 151 void tcf_block_cb_incref(struct tcf_block_cb *block_cb)
 152 {
 153 }
 154
 155 static inline
 156 unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb)
 157 {
 158         return 0;
 159 }
 160
 161 static inline
 162 struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
 163                                              tc_setup_cb_t *cb, void *cb_ident,
 164                                              void *cb_priv)
 165 {
 166         return NULL;
 167 }
 168
 169 static inline
 170 int tcf_block_cb_register(struct tcf_block *block,
 171                           tc_setup_cb_t *cb, void *cb_ident,
 172                           void *cb_priv)
 173 {
 174         return 0;
 175 }
 176
 177 static inline
 178 void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb)
 179 {
 180 }
 181
 182 static inline
 183 void tcf_block_cb_unregister(struct tcf_block *block,
 184                              tc_setup_cb_t *cb, void *cb_ident)
 185 {
 186 }
 187
 188 static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 189                                struct tcf_result *res, bool compat_mode)
 190 {
 191         return TC_ACT_UNSPEC;
 192 }
 193 #endif
 194
 195 static inline unsigned long
 196 __cls_set_class(unsigned long *clp, unsigned long cl)
 197 {
 198         return xchg(clp, cl);
 199 }
 200
 201 static inline unsigned long
 202 cls_set_class(struct Qdisc *q, unsigned long *clp, unsigned long cl)
 203 {
 204         unsigned long old_cl;
 205
 206         sch_tree_lock(q);
 207         old_cl = __cls_set_class(clp, cl);
 208         sch_tree_unlock(q);
 209         return old_cl;
 210 }
 211
 212 static inline void
 213 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
 214 {
 215         struct Qdisc *q = tp->chain->block->q;
 216         unsigned long cl;
 217
 218         /* Check q as it is not set for shared blocks. In that case,
 219          * setting class is not supported.
 220          */
 221         if (!q)
 222                 return;
 223         cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
 224         cl = cls_set_class(q, &r->class, cl);
 225         if (cl)
 226                 q->ops->cl_ops->unbind_tcf(q, cl);
 227 }
 228
 229 static inline void
 230 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
 231 {
 232         struct Qdisc *q = tp->chain->block->q;
 233         unsigned long cl;
 234
 235         if (!q)
 236                 return;
 237         if ((cl = __cls_set_class(&r->class, 0)) != 0)
 238                 q->ops->cl_ops->unbind_tcf(q, cl);
 239 }
 240
 241 struct tcf_exts {
 242 #ifdef CONFIG_NET_CLS_ACT
 243         __u32   type; /* for backward compat(TCA_OLD_COMPAT) */
 244         int nr_actions;
 245         struct tc_action **actions;
 246         struct net *net;
 247 #endif
 248         /* Map to export classifier specific extension TLV types to the
 249          * generic extensions API. Unsupported extensions must be set to 0.
 250          */
 251         int action;
 252         int police;
 253 };
 254
 255 static inline int tcf_exts_init(struct tcf_exts *exts, int action, int police)
 256 {
 257 #ifdef CONFIG_NET_CLS_ACT
 258         exts->type = 0;
 259         exts->nr_actions = 0;
 260         exts->net = NULL;
 261         exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
 262                                 GFP_KERNEL);
 263         if (!exts->actions)
 264                 return -ENOMEM;
 265 #endif
 266         exts->action = action;
 267         exts->police = police;
 268         return 0;
 269 }
 270
 271 /* Return false if the netns is being destroyed in cleanup_net(). Callers
 272  * need to do cleanup synchronously in this case, otherwise may race with
 273  * tc_action_net_exit(). Return true for other cases.
 274  */
 275 static inline bool tcf_exts_get_net(struct tcf_exts *exts)
 276 {
 277 #ifdef CONFIG_NET_CLS_ACT
 278         exts->net = maybe_get_net(exts->net);
 279         return exts->net != NULL;
 280 #else
 281         return true;
 282 #endif
 283 }
 284
 285 static inline void tcf_exts_put_net(struct tcf_exts *exts)
 286 {
 287 #ifdef CONFIG_NET_CLS_ACT
 288         if (exts->net)
 289                 put_net(exts->net);
 290 #endif
 291 }
 292
 293 static inline void tcf_exts_to_list(const struct tcf_exts *exts,
 294                                     struct list_head *actions)
 295 {
 296 #ifdef CONFIG_NET_CLS_ACT
 297         int i;
 298
 299         for (i = 0; i < exts->nr_actions; i++) {
 300                 struct tc_action *a = exts->actions[i];
 301
 302                 list_add_tail(&a->list, actions);
 303         }
 304 #endif
 305 }
 306
 307 static inline void
 308 tcf_exts_stats_update(const struct tcf_exts *exts,
 309                       u64 bytes, u64 packets, u64 lastuse)
 310 {
 311 #ifdef CONFIG_NET_CLS_ACT
 312         int i;
 313
 314         preempt_disable();
 315
 316         for (i = 0; i < exts->nr_actions; i++) {
 317                 struct tc_action *a = exts->actions[i];
 318
 319                 tcf_action_stats_update(a, bytes, packets, lastuse);
 320         }
 321
 322         preempt_enable();
 323 #endif
 324 }
 325
 326 /**
 327  * tcf_exts_has_actions - check if at least one action is present
 328  * @exts: tc filter extensions handle
 329  *
 330  * Returns true if at least one action is present.
 331  */
 332 static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
 333 {
 334 #ifdef CONFIG_NET_CLS_ACT
 335         return exts->nr_actions;
 336 #else
 337         return false;
 338 #endif
 339 }
 340
 341 /**
 342  * tcf_exts_has_one_action - check if exactly one action is present
 343  * @exts: tc filter extensions handle
 344  *
 345  * Returns true if exactly one action is present.
 346  */
 347 static inline bool tcf_exts_has_one_action(struct tcf_exts *exts)
 348 {
 349 #ifdef CONFIG_NET_CLS_ACT
 350         return exts->nr_actions == 1;
 351 #else
 352         return false;
 353 #endif
 354 }
 355
 356 /**
 357  * tcf_exts_exec - execute tc filter extensions
 358  * @skb: socket buffer
 359  * @exts: tc filter extensions handle
 360  * @res: desired result
 361  *
 362  * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
 363  * a negative number if the filter must be considered unmatched or
 364  * a positive action code (TC_ACT_*) which must be returned to the
 365  * underlying layer.
 366  */
 367 static inline int
 368 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
 369               struct tcf_result *res)
 370 {
 371 #ifdef CONFIG_NET_CLS_ACT
 372         return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
 373 #endif
 374         return TC_ACT_OK;
 375 }
 376
 377 int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
 378                       struct nlattr **tb, struct nlattr *rate_tlv,
 379                       struct tcf_exts *exts, bool ovr,
 380                       struct netlink_ext_ack *extack);
 381 void tcf_exts_destroy(struct tcf_exts *exts);
 382 void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
 383 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
 384 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
 385
 386 /**
 387  * struct tcf_pkt_info - packet information
 388  */
 389 struct tcf_pkt_info {
 390         unsigned char *         ptr;
 391         int                     nexthdr;
 392 };
 393
 394 #ifdef CONFIG_NET_EMATCH
 395
 396 struct tcf_ematch_ops;
 397
 398 /**
 399  * struct tcf_ematch - extended match (ematch)
 400  *
 401  * @matchid: identifier to allow userspace to reidentify a match
 402  * @flags: flags specifying attributes and the relation to other matches
 403  * @ops: the operations lookup table of the corresponding ematch module
 404  * @datalen: length of the ematch specific configuration data
 405  * @data: ematch specific data
 406  */
 407 struct tcf_ematch {
 408         struct tcf_ematch_ops * ops;
 409         unsigned long           data;
 410         unsigned int            datalen;
 411         u16                     matchid;
 412         u16                     flags;
 413         struct net              *net;
 414 };
 415
 416 static inline int tcf_em_is_container(struct tcf_ematch *em)
 417 {
 418         return !em->ops;
 419 }
 420
 421 static inline int tcf_em_is_simple(struct tcf_ematch *em)
 422 {
 423         return em->flags & TCF_EM_SIMPLE;
 424 }
 425
 426 static inline int tcf_em_is_inverted(struct tcf_ematch *em)
 427 {
 428         return em->flags & TCF_EM_INVERT;
 429 }
 430
 431 static inline int tcf_em_last_match(struct tcf_ematch *em)
 432 {
 433         return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
 434 }
 435
 436 static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
 437 {
 438         if (tcf_em_last_match(em))
 439                 return 1;
 440
 441         if (result == 0 && em->flags & TCF_EM_REL_AND)
 442                 return 1;
 443
 444         if (result != 0 && em->flags & TCF_EM_REL_OR)
 445                 return 1;
 446
 447         return 0;
 448 }
 449
 450 /**
 451  * struct tcf_ematch_tree - ematch tree handle
 452  *
 453  * @hdr: ematch tree header supplied by userspace
 454  * @matches: array of ematches
 455  */
 456 struct tcf_ematch_tree {
 457         struct tcf_ematch_tree_hdr hdr;
 458         struct tcf_ematch *     matches;
 459
 460 };
 461
 462 /**
 463  * struct tcf_ematch_ops - ematch module operations
 464  *
 465  * @kind: identifier (kind) of this ematch module
 466  * @datalen: length of expected configuration data (optional)
 467  * @change: called during validation (optional)
 468  * @match: called during ematch tree evaluation, must return 1/0
 469  * @destroy: called during destroyage (optional)
 470  * @dump: called during dumping process (optional)
 471  * @owner: owner, must be set to THIS_MODULE
 472  * @link: link to previous/next ematch module (internal use)
 473  */
 474 struct tcf_ematch_ops {
 475         int                     kind;
 476         int                     datalen;
 477         int                     (*change)(struct net *net, void *,
 478                                           int, struct tcf_ematch *);
 479         int                     (*match)(struct sk_buff *, struct tcf_ematch *,
 480                                          struct tcf_pkt_info *);
 481         void                    (*destroy)(struct tcf_ematch *);
 482         int                     (*dump)(struct sk_buff *, struct tcf_ematch *);
 483         struct module           *owner;
 484         struct list_head        link;
 485 };
 486
 487 int tcf_em_register(struct tcf_ematch_ops *);
 488 void tcf_em_unregister(struct tcf_ematch_ops *);
 489 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
 490                          struct tcf_ematch_tree *);
 491 void tcf_em_tree_destroy(struct tcf_ematch_tree *);
 492 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
 493 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
 494                         struct tcf_pkt_info *);
 495
 496 /**
 497  * tcf_em_tree_match - evaulate an ematch tree
 498  *
 499  * @skb: socket buffer of the packet in question
 500  * @tree: ematch tree to be used for evaluation
 501  * @info: packet information examined by classifier
 502  *
 503  * This function matches @skb against the ematch tree in @tree by going
 504  * through all ematches respecting their logic relations returning
 505  * as soon as the result is obvious.
 506  *
 507  * Returns 1 if the ematch tree as-one matches, no ematches are configured
 508  * or ematch is not enabled in the kernel, otherwise 0 is returned.
 509  */
 510 static inline int tcf_em_tree_match(struct sk_buff *skb,
 511                                     struct tcf_ematch_tree *tree,
 512                                     struct tcf_pkt_info *info)
 513 {
 514         if (tree->hdr.nmatches)
 515                 return __tcf_em_tree_match(skb, tree, info);
 516         else
 517                 return 1;
 518 }
 519
 520 #define MODULE_ALIAS_TCF_EMATCH(kind)   MODULE_ALIAS("ematch-kind-" __stringify(kind))
 521
 522 #else /* CONFIG_NET_EMATCH */
 523
 524 struct tcf_ematch_tree {
 525 };
 526
 527 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
 528 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
 529 #define tcf_em_tree_dump(skb, t, tlv) (0)
 530 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
 531
 532 #endif /* CONFIG_NET_EMATCH */
 533
 534 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
 535 {
 536         switch (layer) {
 537                 case TCF_LAYER_LINK:
 538                         return skb_mac_header(skb);
 539                 case TCF_LAYER_NETWORK:
 540                         return skb_network_header(skb);
 541                 case TCF_LAYER_TRANSPORT:
 542                         return skb_transport_header(skb);
 543         }
 544
 545         return NULL;
 546 }
 547
 548 static inline int tcf_valid_offset(const struct sk_buff *skb,
 549                                    const unsigned char *ptr, const int len)
 550 {
 551         return likely((ptr + len) <= skb_tail_pointer(skb) &&
 552                       ptr >= skb->head &&
 553                       (ptr <= (ptr + len)));
 554 }
 555
 556 #ifdef CONFIG_NET_CLS_IND
 557 #include <net/net_namespace.h>
 558
 559 static inline int
 560 tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
 561                  struct netlink_ext_ack *extack)
 562 {
 563         char indev[IFNAMSIZ];
 564         struct net_device *dev;
 565
 566         if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) {
 567                 NL_SET_ERR_MSG(extack, "Interface name too long");
 568                 return -EINVAL;
 569         }
 570         dev = __dev_get_by_name(net, indev);
 571         if (!dev)
 572                 return -ENODEV;
 573         return dev->ifindex;
 574 }
 575
 576 static inline bool
 577 tcf_match_indev(struct sk_buff *skb, int ifindex)
 578 {
 579         if (!ifindex)
 580                 return true;
 581         if  (!skb->skb_iif)
 582                 return false;
 583         return ifindex == skb->skb_iif;
 584 }
 585 #endif /* CONFIG_NET_CLS_IND */
 586
 587 int tc_setup_cb_call(struct tcf_block *block, struct tcf_exts *exts,
 588                      enum tc_setup_type type, void *type_data, bool err_stop);
 589
 590 enum tc_block_command {
 591         TC_BLOCK_BIND,
 592         TC_BLOCK_UNBIND,
 593 };
 594
 595 struct tc_block_offload {
 596         enum tc_block_command command;
 597         enum tcf_block_binder_type binder_type;
 598         struct tcf_block *block;
 599 };
 600
 601 struct tc_cls_common_offload {
 602         u32 chain_index;
 603         __be16 protocol;
 604         u32 prio;
 605         struct netlink_ext_ack *extack;
 606 };
 607
 608 struct tc_cls_u32_knode {
 609         struct tcf_exts *exts;
 610         struct tc_u32_sel *sel;
 611         u32 handle;
 612         u32 val;
 613         u32 mask;
 614         u32 link_handle;
 615         u8 fshift;
 616 };
 617
 618 struct tc_cls_u32_hnode {
 619         u32 handle;
 620         u32 prio;
 621         unsigned int divisor;
 622 };
 623
 624 enum tc_clsu32_command {
 625         TC_CLSU32_NEW_KNODE,
 626         TC_CLSU32_REPLACE_KNODE,
 627         TC_CLSU32_DELETE_KNODE,
 628         TC_CLSU32_NEW_HNODE,
 629         TC_CLSU32_REPLACE_HNODE,
 630         TC_CLSU32_DELETE_HNODE,
 631 };
 632
 633 struct tc_cls_u32_offload {
 634         struct tc_cls_common_offload common;
 635         /* knode values */
 636         enum tc_clsu32_command command;
 637         union {
 638                 struct tc_cls_u32_knode knode;
 639                 struct tc_cls_u32_hnode hnode;
 640         };
 641 };
 642
 643 static inline bool tc_can_offload(const struct net_device *dev)
 644 {
 645         return dev->features & NETIF_F_HW_TC;
 646 }
 647
 648 static inline bool tc_can_offload_extack(const struct net_device *dev,
 649                                          struct netlink_ext_ack *extack)
 650 {
 651         bool can = tc_can_offload(dev);
 652
 653         if (!can)
 654                 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
 655
 656         return can;
 657 }
 658
 659 static inline bool
 660 tc_cls_can_offload_and_chain0(const struct net_device *dev,
 661                               struct tc_cls_common_offload *common)
 662 {
 663         if (!tc_can_offload_extack(dev, common->extack))
 664                 return false;
 665         if (common->chain_index) {
 666                 NL_SET_ERR_MSG(common->extack,
 667                                "Driver supports only offload of chain 0");
 668                 return false;
 669         }
 670         return true;
 671 }
 672
 673 static inline bool tc_skip_hw(u32 flags)
 674 {
 675         return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
 676 }
 677
 678 static inline bool tc_skip_sw(u32 flags)
 679 {
 680         return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
 681 }
 682
 683 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */
 684 static inline bool tc_flags_valid(u32 flags)
 685 {
 686         if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))
 687                 return false;
 688
 689         if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
 690                 return false;
 691
 692         return true;
 693 }
 694
 695 static inline bool tc_in_hw(u32 flags)
 696 {
 697         return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
 698 }
 699
 700 static inline void
 701 tc_cls_common_offload_init(struct tc_cls_common_offload *cls_common,
 702                            const struct tcf_proto *tp, u32 flags,
 703                            struct netlink_ext_ack *extack)
 704 {
 705         cls_common->chain_index = tp->chain->index;
 706         cls_common->protocol = tp->protocol;
 707         cls_common->prio = tp->prio;
 708         if (tc_skip_sw(flags))
 709                 cls_common->extack = extack;
 710 }
 711
 712 enum tc_fl_command {
 713         TC_CLSFLOWER_REPLACE,
 714         TC_CLSFLOWER_DESTROY,
 715         TC_CLSFLOWER_STATS,
 716 };
 717
 718 struct tc_cls_flower_offload {
 719         struct tc_cls_common_offload common;
 720         enum tc_fl_command command;
 721         unsigned long cookie;
 722         struct flow_dissector *dissector;
 723         struct fl_flow_key *mask;
 724         struct fl_flow_key *key;
 725         struct tcf_exts *exts;
 726         u32 classid;
 727 };
 728
 729 enum tc_matchall_command {
 730         TC_CLSMATCHALL_REPLACE,
 731         TC_CLSMATCHALL_DESTROY,
 732 };
 733
 734 struct tc_cls_matchall_offload {
 735         struct tc_cls_common_offload common;
 736         enum tc_matchall_command command;
 737         struct tcf_exts *exts;
 738         unsigned long cookie;
 739 };
 740
 741 enum tc_clsbpf_command {
 742         TC_CLSBPF_OFFLOAD,
 743         TC_CLSBPF_STATS,
 744 };
 745
 746 struct tc_cls_bpf_offload {
 747         struct tc_cls_common_offload common;
 748         enum tc_clsbpf_command command;
 749         struct tcf_exts *exts;
 750         struct bpf_prog *prog;
 751         struct bpf_prog *oldprog;
 752         const char *name;
 753         bool exts_integrated;
 754 };
 755
 756 struct tc_mqprio_qopt_offload {
 757         /* struct tc_mqprio_qopt must always be the first element */
 758         struct tc_mqprio_qopt qopt;
 759         u16 mode;
 760         u16 shaper;
 761         u32 flags;
 762         u64 min_rate[TC_QOPT_MAX_QUEUE];
 763         u64 max_rate[TC_QOPT_MAX_QUEUE];
 764 };
 765
 766 /* This structure holds cookie structure that is passed from user
 767  * to the kernel for actions and classifiers
 768  */
 769 struct tc_cookie {
 770         u8  *data;
 771         u32 len;
 772 };
 773
 774 struct tc_qopt_offload_stats {
 775         struct gnet_stats_basic_packed *bstats;
 776         struct gnet_stats_queue *qstats;
 777 };
 778
 779 enum tc_red_command {
 780         TC_RED_REPLACE,
 781         TC_RED_DESTROY,
 782         TC_RED_STATS,
 783         TC_RED_XSTATS,
 784 };
 785
 786 struct tc_red_qopt_offload_params {
 787         u32 min;
 788         u32 max;
 789         u32 probability;
 790         bool is_ecn;
 791         struct gnet_stats_queue *qstats;
 792 };
 793
 794 struct tc_red_qopt_offload {
 795         enum tc_red_command command;
 796         u32 handle;
 797         u32 parent;
 798         union {
 799                 struct tc_red_qopt_offload_params set;
 800                 struct tc_qopt_offload_stats stats;
 801                 struct red_stats *xstats;
 802         };
 803 };
 804
 805 enum tc_prio_command {
 806         TC_PRIO_REPLACE,
 807         TC_PRIO_DESTROY,
 808         TC_PRIO_STATS,
 809 };
 810
 811 struct tc_prio_qopt_offload_params {
 812         int bands;
 813         u8 priomap[TC_PRIO_MAX + 1];
 814         /* In case that a prio qdisc is offloaded and now is changed to a
 815          * non-offloadedable config, it needs to update the backlog & qlen
 816          * values to negate the HW backlog & qlen values (and only them).
 817          */
 818         struct gnet_stats_queue *qstats;
 819 };
 820
 821 struct tc_prio_qopt_offload {
 822         enum tc_prio_command command;
 823         u32 handle;
 824         u32 parent;
 825         union {
 826                 struct tc_prio_qopt_offload_params replace_params;
 827                 struct tc_qopt_offload_stats stats;
 828         };
 829 };
 830 #endif