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 #include <net/net_namespace.h> 10 11 /* TC action not accessible from user space */ 12 #define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1) 13 14 /* Basic packet classifier frontend definitions. */ 15 16 struct tcf_walker { 17 int stop; 18 int skip; 19 int count; 20 bool nonempty; 21 unsigned long cookie; 22 int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *); 23 }; 24 25 int register_tcf_proto_ops(struct tcf_proto_ops *ops); 26 void unregister_tcf_proto_ops(struct tcf_proto_ops *ops); 27 28 struct tcf_block_ext_info { 29 enum flow_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_qevent { 36 struct tcf_block *block; 37 struct tcf_block_ext_info info; 38 struct tcf_proto __rcu *filter_chain; 39 }; 40 41 struct tcf_block_cb; 42 bool tcf_queue_work(struct rcu_work *rwork, work_func_t func); 43 44 #ifdef CONFIG_NET_CLS 45 struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block, 46 u32 chain_index); 47 void tcf_chain_put_by_act(struct tcf_chain *chain); 48 struct tcf_chain *tcf_get_next_chain(struct tcf_block *block, 49 struct tcf_chain *chain); 50 struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain, 51 struct tcf_proto *tp); 52 void tcf_block_netif_keep_dst(struct tcf_block *block); 53 int tcf_block_get(struct tcf_block **p_block, 54 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, 55 struct netlink_ext_ack *extack); 56 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, 57 struct tcf_block_ext_info *ei, 58 struct netlink_ext_ack *extack); 59 void tcf_block_put(struct tcf_block *block); 60 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, 61 struct tcf_block_ext_info *ei); 62 int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action, 63 int police, struct tcf_proto *tp, u32 handle, bool used_action_miss); 64 65 static inline bool tcf_block_shared(struct tcf_block *block) 66 { 67 return block->index; 68 } 69 70 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 71 { 72 return block && block->index; 73 } 74 75 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 76 { 77 WARN_ON(tcf_block_shared(block)); 78 return block->q; 79 } 80 81 int tcf_classify(struct sk_buff *skb, 82 const struct tcf_block *block, 83 const struct tcf_proto *tp, struct tcf_result *res, 84 bool compat_mode); 85 86 static inline bool tc_cls_stats_dump(struct tcf_proto *tp, 87 struct tcf_walker *arg, 88 void *filter) 89 { 90 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) { 91 arg->stop = 1; 92 return false; 93 } 94 95 arg->count++; 96 return true; 97 } 98 99 #else 100 static inline bool tcf_block_shared(struct tcf_block *block) 101 { 102 return false; 103 } 104 105 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 106 { 107 return false; 108 } 109 110 static inline 111 int tcf_block_get(struct tcf_block **p_block, 112 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, 113 struct netlink_ext_ack *extack) 114 { 115 return 0; 116 } 117 118 static inline 119 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, 120 struct tcf_block_ext_info *ei, 121 struct netlink_ext_ack *extack) 122 { 123 return 0; 124 } 125 126 static inline void tcf_block_put(struct tcf_block *block) 127 { 128 } 129 130 static inline 131 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, 132 struct tcf_block_ext_info *ei) 133 { 134 } 135 136 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 137 { 138 return NULL; 139 } 140 141 static inline 142 int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb, 143 void *cb_priv) 144 { 145 return 0; 146 } 147 148 static inline 149 void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb, 150 void *cb_priv) 151 { 152 } 153 154 static inline int tcf_classify(struct sk_buff *skb, 155 const struct tcf_block *block, 156 const struct tcf_proto *tp, 157 struct tcf_result *res, bool compat_mode) 158 { 159 return TC_ACT_UNSPEC; 160 } 161 162 #endif 163 164 static inline unsigned long 165 __cls_set_class(unsigned long *clp, unsigned long cl) 166 { 167 return xchg(clp, cl); 168 } 169 170 static inline void 171 __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) 172 { 173 unsigned long cl; 174 175 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); 176 cl = __cls_set_class(&r->class, cl); 177 if (cl) 178 q->ops->cl_ops->unbind_tcf(q, cl); 179 } 180 181 static inline void 182 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) 183 { 184 struct Qdisc *q = tp->chain->block->q; 185 186 /* Check q as it is not set for shared blocks. In that case, 187 * setting class is not supported. 188 */ 189 if (!q) 190 return; 191 sch_tree_lock(q); 192 __tcf_bind_filter(q, r, base); 193 sch_tree_unlock(q); 194 } 195 196 static inline void 197 __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) 198 { 199 unsigned long cl; 200 201 if ((cl = __cls_set_class(&r->class, 0)) != 0) 202 q->ops->cl_ops->unbind_tcf(q, cl); 203 } 204 205 static inline void 206 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) 207 { 208 struct Qdisc *q = tp->chain->block->q; 209 210 if (!q) 211 return; 212 __tcf_unbind_filter(q, r); 213 } 214 215 static inline void tc_cls_bind_class(u32 classid, unsigned long cl, 216 void *q, struct tcf_result *res, 217 unsigned long base) 218 { 219 if (res->classid == classid) { 220 if (cl) 221 __tcf_bind_filter(q, res, base); 222 else 223 __tcf_unbind_filter(q, res); 224 } 225 } 226 227 struct tcf_exts { 228 #ifdef CONFIG_NET_CLS_ACT 229 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 230 int nr_actions; 231 struct tc_action **actions; 232 struct net *net; 233 netns_tracker ns_tracker; 234 struct tcf_exts_miss_cookie_node *miss_cookie_node; 235 #endif 236 /* Map to export classifier specific extension TLV types to the 237 * generic extensions API. Unsupported extensions must be set to 0. 238 */ 239 int action; 240 int police; 241 }; 242 243 static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, 244 int action, int police) 245 { 246 #ifdef CONFIG_NET_CLS 247 return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false); 248 #else 249 return -EOPNOTSUPP; 250 #endif 251 } 252 253 /* Return false if the netns is being destroyed in cleanup_net(). Callers 254 * need to do cleanup synchronously in this case, otherwise may race with 255 * tc_action_net_exit(). Return true for other cases. 256 */ 257 static inline bool tcf_exts_get_net(struct tcf_exts *exts) 258 { 259 #ifdef CONFIG_NET_CLS_ACT 260 exts->net = maybe_get_net(exts->net); 261 if (exts->net) 262 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL); 263 return exts->net != NULL; 264 #else 265 return true; 266 #endif 267 } 268 269 static inline void tcf_exts_put_net(struct tcf_exts *exts) 270 { 271 #ifdef CONFIG_NET_CLS_ACT 272 if (exts->net) 273 put_net_track(exts->net, &exts->ns_tracker); 274 #endif 275 } 276 277 #ifdef CONFIG_NET_CLS_ACT 278 #define tcf_exts_for_each_action(i, a, exts) \ 279 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) 280 #else 281 #define tcf_exts_for_each_action(i, a, exts) \ 282 for (; 0; (void)(i), (void)(a), (void)(exts)) 283 #endif 284 285 #define tcf_act_for_each_action(i, a, actions) \ 286 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) 287 288 static inline bool tc_act_in_hw(struct tc_action *act) 289 { 290 return !!act->in_hw_count; 291 } 292 293 static inline void 294 tcf_exts_hw_stats_update(const struct tcf_exts *exts, 295 struct flow_stats *stats, 296 bool use_act_stats) 297 { 298 #ifdef CONFIG_NET_CLS_ACT 299 int i; 300 301 for (i = 0; i < exts->nr_actions; i++) { 302 struct tc_action *a = exts->actions[i]; 303 304 if (use_act_stats || tc_act_in_hw(a)) { 305 if (!tcf_action_update_hw_stats(a)) 306 continue; 307 } 308 309 preempt_disable(); 310 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops, 311 stats->lastused, true); 312 preempt_enable(); 313 314 a->used_hw_stats = stats->used_hw_stats; 315 a->used_hw_stats_valid = stats->used_hw_stats_valid; 316 } 317 #endif 318 } 319 320 /** 321 * tcf_exts_has_actions - check if at least one action is present 322 * @exts: tc filter extensions handle 323 * 324 * Returns true if at least one action is present. 325 */ 326 static inline bool tcf_exts_has_actions(struct tcf_exts *exts) 327 { 328 #ifdef CONFIG_NET_CLS_ACT 329 return exts->nr_actions; 330 #else 331 return false; 332 #endif 333 } 334 335 /** 336 * tcf_exts_exec - execute tc filter extensions 337 * @skb: socket buffer 338 * @exts: tc filter extensions handle 339 * @res: desired result 340 * 341 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, 342 * a negative number if the filter must be considered unmatched or 343 * a positive action code (TC_ACT_*) which must be returned to the 344 * underlying layer. 345 */ 346 static inline int 347 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, 348 struct tcf_result *res) 349 { 350 #ifdef CONFIG_NET_CLS_ACT 351 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); 352 #endif 353 return TC_ACT_OK; 354 } 355 356 static inline int 357 tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index, 358 struct tcf_result *res) 359 { 360 #ifdef CONFIG_NET_CLS_ACT 361 return tcf_action_exec(skb, exts->actions + act_index, 362 exts->nr_actions - act_index, res); 363 #else 364 return TC_ACT_OK; 365 #endif 366 } 367 368 int tcf_exts_validate(struct net *net, struct tcf_proto *tp, 369 struct nlattr **tb, struct nlattr *rate_tlv, 370 struct tcf_exts *exts, u32 flags, 371 struct netlink_ext_ack *extack); 372 int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb, 373 struct nlattr *rate_tlv, struct tcf_exts *exts, 374 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); 375 void tcf_exts_destroy(struct tcf_exts *exts); 376 void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); 377 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); 378 int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); 379 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); 380 381 /** 382 * struct tcf_pkt_info - packet information 383 * 384 * @ptr: start of the pkt data 385 * @nexthdr: offset of the next header 386 */ 387 struct tcf_pkt_info { 388 unsigned char * ptr; 389 int nexthdr; 390 }; 391 392 #ifdef CONFIG_NET_EMATCH 393 394 struct tcf_ematch_ops; 395 396 /** 397 * struct tcf_ematch - extended match (ematch) 398 * 399 * @matchid: identifier to allow userspace to reidentify a match 400 * @flags: flags specifying attributes and the relation to other matches 401 * @ops: the operations lookup table of the corresponding ematch module 402 * @datalen: length of the ematch specific configuration data 403 * @data: ematch specific data 404 * @net: the network namespace 405 */ 406 struct tcf_ematch { 407 struct tcf_ematch_ops * ops; 408 unsigned long data; 409 unsigned int datalen; 410 u16 matchid; 411 u16 flags; 412 struct net *net; 413 }; 414 415 static inline int tcf_em_is_container(struct tcf_ematch *em) 416 { 417 return !em->ops; 418 } 419 420 static inline int tcf_em_is_simple(struct tcf_ematch *em) 421 { 422 return em->flags & TCF_EM_SIMPLE; 423 } 424 425 static inline int tcf_em_is_inverted(struct tcf_ematch *em) 426 { 427 return em->flags & TCF_EM_INVERT; 428 } 429 430 static inline int tcf_em_last_match(struct tcf_ematch *em) 431 { 432 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; 433 } 434 435 static inline int tcf_em_early_end(struct tcf_ematch *em, int result) 436 { 437 if (tcf_em_last_match(em)) 438 return 1; 439 440 if (result == 0 && em->flags & TCF_EM_REL_AND) 441 return 1; 442 443 if (result != 0 && em->flags & TCF_EM_REL_OR) 444 return 1; 445 446 return 0; 447 } 448 449 /** 450 * struct tcf_ematch_tree - ematch tree handle 451 * 452 * @hdr: ematch tree header supplied by userspace 453 * @matches: array of ematches 454 */ 455 struct tcf_ematch_tree { 456 struct tcf_ematch_tree_hdr hdr; 457 struct tcf_ematch * matches; 458 459 }; 460 461 /** 462 * struct tcf_ematch_ops - ematch module operations 463 * 464 * @kind: identifier (kind) of this ematch module 465 * @datalen: length of expected configuration data (optional) 466 * @change: called during validation (optional) 467 * @match: called during ematch tree evaluation, must return 1/0 468 * @destroy: called during destroyage (optional) 469 * @dump: called during dumping process (optional) 470 * @owner: owner, must be set to THIS_MODULE 471 * @link: link to previous/next ematch module (internal use) 472 */ 473 struct tcf_ematch_ops { 474 int kind; 475 int datalen; 476 int (*change)(struct net *net, void *, 477 int, struct tcf_ematch *); 478 int (*match)(struct sk_buff *, struct tcf_ematch *, 479 struct tcf_pkt_info *); 480 void (*destroy)(struct tcf_ematch *); 481 int (*dump)(struct sk_buff *, struct tcf_ematch *); 482 struct module *owner; 483 struct list_head link; 484 }; 485 486 int tcf_em_register(struct tcf_ematch_ops *); 487 void tcf_em_unregister(struct tcf_ematch_ops *); 488 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, 489 struct tcf_ematch_tree *); 490 void tcf_em_tree_destroy(struct tcf_ematch_tree *); 491 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); 492 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, 493 struct tcf_pkt_info *); 494 495 /** 496 * tcf_em_tree_match - evaulate an ematch tree 497 * 498 * @skb: socket buffer of the packet in question 499 * @tree: ematch tree to be used for evaluation 500 * @info: packet information examined by classifier 501 * 502 * This function matches @skb against the ematch tree in @tree by going 503 * through all ematches respecting their logic relations returning 504 * as soon as the result is obvious. 505 * 506 * Returns 1 if the ematch tree as-one matches, no ematches are configured 507 * or ematch is not enabled in the kernel, otherwise 0 is returned. 508 */ 509 static inline int tcf_em_tree_match(struct sk_buff *skb, 510 struct tcf_ematch_tree *tree, 511 struct tcf_pkt_info *info) 512 { 513 if (tree->hdr.nmatches) 514 return __tcf_em_tree_match(skb, tree, info); 515 else 516 return 1; 517 } 518 519 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) 520 521 #else /* CONFIG_NET_EMATCH */ 522 523 struct tcf_ematch_tree { 524 }; 525 526 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) 527 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) 528 #define tcf_em_tree_dump(skb, t, tlv) (0) 529 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) 530 531 #endif /* CONFIG_NET_EMATCH */ 532 533 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) 534 { 535 switch (layer) { 536 case TCF_LAYER_LINK: 537 return skb_mac_header(skb); 538 case TCF_LAYER_NETWORK: 539 return skb_network_header(skb); 540 case TCF_LAYER_TRANSPORT: 541 return skb_transport_header(skb); 542 } 543 544 return NULL; 545 } 546 547 static inline int tcf_valid_offset(const struct sk_buff *skb, 548 const unsigned char *ptr, const int len) 549 { 550 return likely((ptr + len) <= skb_tail_pointer(skb) && 551 ptr >= skb->head && 552 (ptr <= (ptr + len))); 553 } 554 555 static inline int 556 tcf_change_indev(struct net *net, struct nlattr *indev_tlv, 557 struct netlink_ext_ack *extack) 558 { 559 char indev[IFNAMSIZ]; 560 struct net_device *dev; 561 562 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) { 563 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 564 "Interface name too long"); 565 return -EINVAL; 566 } 567 dev = __dev_get_by_name(net, indev); 568 if (!dev) { 569 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 570 "Network device not found"); 571 return -ENODEV; 572 } 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 } 585 586 int tc_setup_offload_action(struct flow_action *flow_action, 587 const struct tcf_exts *exts, 588 struct netlink_ext_ack *extack); 589 void tc_cleanup_offload_action(struct flow_action *flow_action); 590 int tc_setup_action(struct flow_action *flow_action, 591 struct tc_action *actions[], 592 u32 miss_cookie_base, 593 struct netlink_ext_ack *extack); 594 595 int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, 596 void *type_data, bool err_stop, bool rtnl_held); 597 int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, 598 enum tc_setup_type type, void *type_data, bool err_stop, 599 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 600 int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, 601 enum tc_setup_type type, void *type_data, bool err_stop, 602 u32 *old_flags, unsigned int *old_in_hw_count, 603 u32 *new_flags, unsigned int *new_in_hw_count, 604 bool rtnl_held); 605 int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, 606 enum tc_setup_type type, void *type_data, bool err_stop, 607 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 608 int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, 609 bool add, flow_setup_cb_t *cb, 610 enum tc_setup_type type, void *type_data, 611 void *cb_priv, u32 *flags, unsigned int *in_hw_count); 612 unsigned int tcf_exts_num_actions(struct tcf_exts *exts); 613 614 #ifdef CONFIG_NET_CLS_ACT 615 int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 616 enum flow_block_binder_type binder_type, 617 struct nlattr *block_index_attr, 618 struct netlink_ext_ack *extack); 619 void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch); 620 int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 621 struct netlink_ext_ack *extack); 622 struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 623 struct sk_buff **to_free, int *ret); 624 int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe); 625 #else 626 static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 627 enum flow_block_binder_type binder_type, 628 struct nlattr *block_index_attr, 629 struct netlink_ext_ack *extack) 630 { 631 return 0; 632 } 633 634 static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch) 635 { 636 } 637 638 static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 639 struct netlink_ext_ack *extack) 640 { 641 return 0; 642 } 643 644 static inline struct sk_buff * 645 tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 646 struct sk_buff **to_free, int *ret) 647 { 648 return skb; 649 } 650 651 static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe) 652 { 653 return 0; 654 } 655 #endif 656 657 struct tc_cls_u32_knode { 658 struct tcf_exts *exts; 659 struct tcf_result *res; 660 struct tc_u32_sel *sel; 661 u32 handle; 662 u32 val; 663 u32 mask; 664 u32 link_handle; 665 u8 fshift; 666 }; 667 668 struct tc_cls_u32_hnode { 669 u32 handle; 670 u32 prio; 671 unsigned int divisor; 672 }; 673 674 enum tc_clsu32_command { 675 TC_CLSU32_NEW_KNODE, 676 TC_CLSU32_REPLACE_KNODE, 677 TC_CLSU32_DELETE_KNODE, 678 TC_CLSU32_NEW_HNODE, 679 TC_CLSU32_REPLACE_HNODE, 680 TC_CLSU32_DELETE_HNODE, 681 }; 682 683 struct tc_cls_u32_offload { 684 struct flow_cls_common_offload common; 685 /* knode values */ 686 enum tc_clsu32_command command; 687 union { 688 struct tc_cls_u32_knode knode; 689 struct tc_cls_u32_hnode hnode; 690 }; 691 }; 692 693 static inline bool tc_can_offload(const struct net_device *dev) 694 { 695 return dev->features & NETIF_F_HW_TC; 696 } 697 698 static inline bool tc_can_offload_extack(const struct net_device *dev, 699 struct netlink_ext_ack *extack) 700 { 701 bool can = tc_can_offload(dev); 702 703 if (!can) 704 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device"); 705 706 return can; 707 } 708 709 static inline bool 710 tc_cls_can_offload_and_chain0(const struct net_device *dev, 711 struct flow_cls_common_offload *common) 712 { 713 if (!tc_can_offload_extack(dev, common->extack)) 714 return false; 715 if (common->chain_index) { 716 NL_SET_ERR_MSG(common->extack, 717 "Driver supports only offload of chain 0"); 718 return false; 719 } 720 return true; 721 } 722 723 static inline bool tc_skip_hw(u32 flags) 724 { 725 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; 726 } 727 728 static inline bool tc_skip_sw(u32 flags) 729 { 730 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; 731 } 732 733 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ 734 static inline bool tc_flags_valid(u32 flags) 735 { 736 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | 737 TCA_CLS_FLAGS_VERBOSE)) 738 return false; 739 740 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; 741 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) 742 return false; 743 744 return true; 745 } 746 747 static inline bool tc_in_hw(u32 flags) 748 { 749 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; 750 } 751 752 static inline void 753 tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, 754 const struct tcf_proto *tp, u32 flags, 755 struct netlink_ext_ack *extack) 756 { 757 cls_common->chain_index = tp->chain->index; 758 cls_common->protocol = tp->protocol; 759 cls_common->prio = tp->prio >> 16; 760 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) 761 cls_common->extack = extack; 762 } 763 764 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 765 static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb) 766 { 767 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT); 768 769 if (tc_skb_ext) 770 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext)); 771 return tc_skb_ext; 772 } 773 #endif 774 775 enum tc_matchall_command { 776 TC_CLSMATCHALL_REPLACE, 777 TC_CLSMATCHALL_DESTROY, 778 TC_CLSMATCHALL_STATS, 779 }; 780 781 struct tc_cls_matchall_offload { 782 struct flow_cls_common_offload common; 783 enum tc_matchall_command command; 784 struct flow_rule *rule; 785 struct flow_stats stats; 786 bool use_act_stats; 787 unsigned long cookie; 788 }; 789 790 enum tc_clsbpf_command { 791 TC_CLSBPF_OFFLOAD, 792 TC_CLSBPF_STATS, 793 }; 794 795 struct tc_cls_bpf_offload { 796 struct flow_cls_common_offload common; 797 enum tc_clsbpf_command command; 798 struct tcf_exts *exts; 799 struct bpf_prog *prog; 800 struct bpf_prog *oldprog; 801 const char *name; 802 bool exts_integrated; 803 }; 804 805 /* This structure holds cookie structure that is passed from user 806 * to the kernel for actions and classifiers 807 */ 808 struct tc_cookie { 809 u8 *data; 810 u32 len; 811 struct rcu_head rcu; 812 }; 813 814 struct tc_qopt_offload_stats { 815 struct gnet_stats_basic_sync *bstats; 816 struct gnet_stats_queue *qstats; 817 }; 818 819 enum tc_mq_command { 820 TC_MQ_CREATE, 821 TC_MQ_DESTROY, 822 TC_MQ_STATS, 823 TC_MQ_GRAFT, 824 }; 825 826 struct tc_mq_opt_offload_graft_params { 827 unsigned long queue; 828 u32 child_handle; 829 }; 830 831 struct tc_mq_qopt_offload { 832 enum tc_mq_command command; 833 u32 handle; 834 union { 835 struct tc_qopt_offload_stats stats; 836 struct tc_mq_opt_offload_graft_params graft_params; 837 }; 838 }; 839 840 enum tc_htb_command { 841 /* Root */ 842 TC_HTB_CREATE, /* Initialize HTB offload. */ 843 TC_HTB_DESTROY, /* Destroy HTB offload. */ 844 845 /* Classes */ 846 /* Allocate qid and create leaf. */ 847 TC_HTB_LEAF_ALLOC_QUEUE, 848 /* Convert leaf to inner, preserve and return qid, create new leaf. */ 849 TC_HTB_LEAF_TO_INNER, 850 /* Delete leaf, while siblings remain. */ 851 TC_HTB_LEAF_DEL, 852 /* Delete leaf, convert parent to leaf, preserving qid. */ 853 TC_HTB_LEAF_DEL_LAST, 854 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ 855 TC_HTB_LEAF_DEL_LAST_FORCE, 856 /* Modify parameters of a node. */ 857 TC_HTB_NODE_MODIFY, 858 859 /* Class qdisc */ 860 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ 861 }; 862 863 struct tc_htb_qopt_offload { 864 struct netlink_ext_ack *extack; 865 enum tc_htb_command command; 866 u32 parent_classid; 867 u16 classid; 868 u16 qid; 869 u64 rate; 870 u64 ceil; 871 u8 prio; 872 }; 873 874 #define TC_HTB_CLASSID_ROOT U32_MAX 875 876 enum tc_red_command { 877 TC_RED_REPLACE, 878 TC_RED_DESTROY, 879 TC_RED_STATS, 880 TC_RED_XSTATS, 881 TC_RED_GRAFT, 882 }; 883 884 struct tc_red_qopt_offload_params { 885 u32 min; 886 u32 max; 887 u32 probability; 888 u32 limit; 889 bool is_ecn; 890 bool is_harddrop; 891 bool is_nodrop; 892 struct gnet_stats_queue *qstats; 893 }; 894 895 struct tc_red_qopt_offload { 896 enum tc_red_command command; 897 u32 handle; 898 u32 parent; 899 union { 900 struct tc_red_qopt_offload_params set; 901 struct tc_qopt_offload_stats stats; 902 struct red_stats *xstats; 903 u32 child_handle; 904 }; 905 }; 906 907 enum tc_gred_command { 908 TC_GRED_REPLACE, 909 TC_GRED_DESTROY, 910 TC_GRED_STATS, 911 }; 912 913 struct tc_gred_vq_qopt_offload_params { 914 bool present; 915 u32 limit; 916 u32 prio; 917 u32 min; 918 u32 max; 919 bool is_ecn; 920 bool is_harddrop; 921 u32 probability; 922 /* Only need backlog, see struct tc_prio_qopt_offload_params */ 923 u32 *backlog; 924 }; 925 926 struct tc_gred_qopt_offload_params { 927 bool grio_on; 928 bool wred_on; 929 unsigned int dp_cnt; 930 unsigned int dp_def; 931 struct gnet_stats_queue *qstats; 932 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; 933 }; 934 935 struct tc_gred_qopt_offload_stats { 936 struct gnet_stats_basic_sync bstats[MAX_DPs]; 937 struct gnet_stats_queue qstats[MAX_DPs]; 938 struct red_stats *xstats[MAX_DPs]; 939 }; 940 941 struct tc_gred_qopt_offload { 942 enum tc_gred_command command; 943 u32 handle; 944 u32 parent; 945 union { 946 struct tc_gred_qopt_offload_params set; 947 struct tc_gred_qopt_offload_stats stats; 948 }; 949 }; 950 951 enum tc_prio_command { 952 TC_PRIO_REPLACE, 953 TC_PRIO_DESTROY, 954 TC_PRIO_STATS, 955 TC_PRIO_GRAFT, 956 }; 957 958 struct tc_prio_qopt_offload_params { 959 int bands; 960 u8 priomap[TC_PRIO_MAX + 1]; 961 /* At the point of un-offloading the Qdisc, the reported backlog and 962 * qlen need to be reduced by the portion that is in HW. 963 */ 964 struct gnet_stats_queue *qstats; 965 }; 966 967 struct tc_prio_qopt_offload_graft_params { 968 u8 band; 969 u32 child_handle; 970 }; 971 972 struct tc_prio_qopt_offload { 973 enum tc_prio_command command; 974 u32 handle; 975 u32 parent; 976 union { 977 struct tc_prio_qopt_offload_params replace_params; 978 struct tc_qopt_offload_stats stats; 979 struct tc_prio_qopt_offload_graft_params graft_params; 980 }; 981 }; 982 983 enum tc_root_command { 984 TC_ROOT_GRAFT, 985 }; 986 987 struct tc_root_qopt_offload { 988 enum tc_root_command command; 989 u32 handle; 990 bool ingress; 991 }; 992 993 enum tc_ets_command { 994 TC_ETS_REPLACE, 995 TC_ETS_DESTROY, 996 TC_ETS_STATS, 997 TC_ETS_GRAFT, 998 }; 999 1000 struct tc_ets_qopt_offload_replace_params { 1001 unsigned int bands; 1002 u8 priomap[TC_PRIO_MAX + 1]; 1003 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ 1004 unsigned int weights[TCQ_ETS_MAX_BANDS]; 1005 struct gnet_stats_queue *qstats; 1006 }; 1007 1008 struct tc_ets_qopt_offload_graft_params { 1009 u8 band; 1010 u32 child_handle; 1011 }; 1012 1013 struct tc_ets_qopt_offload { 1014 enum tc_ets_command command; 1015 u32 handle; 1016 u32 parent; 1017 union { 1018 struct tc_ets_qopt_offload_replace_params replace_params; 1019 struct tc_qopt_offload_stats stats; 1020 struct tc_ets_qopt_offload_graft_params graft_params; 1021 }; 1022 }; 1023 1024 enum tc_tbf_command { 1025 TC_TBF_REPLACE, 1026 TC_TBF_DESTROY, 1027 TC_TBF_STATS, 1028 TC_TBF_GRAFT, 1029 }; 1030 1031 struct tc_tbf_qopt_offload_replace_params { 1032 struct psched_ratecfg rate; 1033 u32 max_size; 1034 struct gnet_stats_queue *qstats; 1035 }; 1036 1037 struct tc_tbf_qopt_offload { 1038 enum tc_tbf_command command; 1039 u32 handle; 1040 u32 parent; 1041 union { 1042 struct tc_tbf_qopt_offload_replace_params replace_params; 1043 struct tc_qopt_offload_stats stats; 1044 u32 child_handle; 1045 }; 1046 }; 1047 1048 enum tc_fifo_command { 1049 TC_FIFO_REPLACE, 1050 TC_FIFO_DESTROY, 1051 TC_FIFO_STATS, 1052 }; 1053 1054 struct tc_fifo_qopt_offload { 1055 enum tc_fifo_command command; 1056 u32 handle; 1057 u32 parent; 1058 union { 1059 struct tc_qopt_offload_stats stats; 1060 }; 1061 }; 1062 1063 #ifdef CONFIG_NET_CLS_ACT 1064 DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc); 1065 void tc_skb_ext_tc_enable(void); 1066 void tc_skb_ext_tc_disable(void); 1067 #define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc) 1068 #else /* CONFIG_NET_CLS_ACT */ 1069 static inline void tc_skb_ext_tc_enable(void) { } 1070 static inline void tc_skb_ext_tc_disable(void) { } 1071 #define tc_skb_ext_tc_enabled() false 1072 #endif 1073 1074 #endif 1075