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 int tcf_classify(struct sk_buff *skb, 142 const struct tcf_block *block, 143 const struct tcf_proto *tp, 144 struct tcf_result *res, bool compat_mode) 145 { 146 return TC_ACT_UNSPEC; 147 } 148 149 #endif 150 151 static inline unsigned long 152 __cls_set_class(unsigned long *clp, unsigned long cl) 153 { 154 return xchg(clp, cl); 155 } 156 157 static inline void 158 __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) 159 { 160 unsigned long cl; 161 162 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); 163 cl = __cls_set_class(&r->class, cl); 164 if (cl) 165 q->ops->cl_ops->unbind_tcf(q, cl); 166 } 167 168 static inline void 169 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) 170 { 171 struct Qdisc *q = tp->chain->block->q; 172 173 /* Check q as it is not set for shared blocks. In that case, 174 * setting class is not supported. 175 */ 176 if (!q) 177 return; 178 sch_tree_lock(q); 179 __tcf_bind_filter(q, r, base); 180 sch_tree_unlock(q); 181 } 182 183 static inline void 184 __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) 185 { 186 unsigned long cl; 187 188 if ((cl = __cls_set_class(&r->class, 0)) != 0) 189 q->ops->cl_ops->unbind_tcf(q, cl); 190 } 191 192 static inline void 193 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) 194 { 195 struct Qdisc *q = tp->chain->block->q; 196 197 if (!q) 198 return; 199 __tcf_unbind_filter(q, r); 200 } 201 202 static inline void tc_cls_bind_class(u32 classid, unsigned long cl, 203 void *q, struct tcf_result *res, 204 unsigned long base) 205 { 206 if (res->classid == classid) { 207 if (cl) 208 __tcf_bind_filter(q, res, base); 209 else 210 __tcf_unbind_filter(q, res); 211 } 212 } 213 214 struct tcf_exts { 215 #ifdef CONFIG_NET_CLS_ACT 216 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 217 int nr_actions; 218 struct tc_action **actions; 219 struct net *net; 220 netns_tracker ns_tracker; 221 struct tcf_exts_miss_cookie_node *miss_cookie_node; 222 #endif 223 /* Map to export classifier specific extension TLV types to the 224 * generic extensions API. Unsupported extensions must be set to 0. 225 */ 226 int action; 227 int police; 228 }; 229 230 static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, 231 int action, int police) 232 { 233 #ifdef CONFIG_NET_CLS 234 return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false); 235 #else 236 return -EOPNOTSUPP; 237 #endif 238 } 239 240 /* Return false if the netns is being destroyed in cleanup_net(). Callers 241 * need to do cleanup synchronously in this case, otherwise may race with 242 * tc_action_net_exit(). Return true for other cases. 243 */ 244 static inline bool tcf_exts_get_net(struct tcf_exts *exts) 245 { 246 #ifdef CONFIG_NET_CLS_ACT 247 exts->net = maybe_get_net(exts->net); 248 if (exts->net) 249 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL); 250 return exts->net != NULL; 251 #else 252 return true; 253 #endif 254 } 255 256 static inline void tcf_exts_put_net(struct tcf_exts *exts) 257 { 258 #ifdef CONFIG_NET_CLS_ACT 259 if (exts->net) 260 put_net_track(exts->net, &exts->ns_tracker); 261 #endif 262 } 263 264 #ifdef CONFIG_NET_CLS_ACT 265 #define tcf_exts_for_each_action(i, a, exts) \ 266 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) 267 #else 268 #define tcf_exts_for_each_action(i, a, exts) \ 269 for (; 0; (void)(i), (void)(a), (void)(exts)) 270 #endif 271 272 #define tcf_act_for_each_action(i, a, actions) \ 273 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) 274 275 static inline bool tc_act_in_hw(struct tc_action *act) 276 { 277 return !!act->in_hw_count; 278 } 279 280 static inline void 281 tcf_exts_hw_stats_update(const struct tcf_exts *exts, 282 struct flow_stats *stats, 283 bool use_act_stats) 284 { 285 #ifdef CONFIG_NET_CLS_ACT 286 int i; 287 288 for (i = 0; i < exts->nr_actions; i++) { 289 struct tc_action *a = exts->actions[i]; 290 291 if (use_act_stats || tc_act_in_hw(a)) { 292 if (!tcf_action_update_hw_stats(a)) 293 continue; 294 } 295 296 preempt_disable(); 297 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops, 298 stats->lastused, true); 299 preempt_enable(); 300 301 a->used_hw_stats = stats->used_hw_stats; 302 a->used_hw_stats_valid = stats->used_hw_stats_valid; 303 } 304 #endif 305 } 306 307 /** 308 * tcf_exts_has_actions - check if at least one action is present 309 * @exts: tc filter extensions handle 310 * 311 * Returns true if at least one action is present. 312 */ 313 static inline bool tcf_exts_has_actions(struct tcf_exts *exts) 314 { 315 #ifdef CONFIG_NET_CLS_ACT 316 return exts->nr_actions; 317 #else 318 return false; 319 #endif 320 } 321 322 /** 323 * tcf_exts_exec - execute tc filter extensions 324 * @skb: socket buffer 325 * @exts: tc filter extensions handle 326 * @res: desired result 327 * 328 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, 329 * a negative number if the filter must be considered unmatched or 330 * a positive action code (TC_ACT_*) which must be returned to the 331 * underlying layer. 332 */ 333 static inline int 334 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, 335 struct tcf_result *res) 336 { 337 #ifdef CONFIG_NET_CLS_ACT 338 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); 339 #endif 340 return TC_ACT_OK; 341 } 342 343 static inline int 344 tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index, 345 struct tcf_result *res) 346 { 347 #ifdef CONFIG_NET_CLS_ACT 348 return tcf_action_exec(skb, exts->actions + act_index, 349 exts->nr_actions - act_index, res); 350 #else 351 return TC_ACT_OK; 352 #endif 353 } 354 355 int tcf_exts_validate(struct net *net, struct tcf_proto *tp, 356 struct nlattr **tb, struct nlattr *rate_tlv, 357 struct tcf_exts *exts, u32 flags, 358 struct netlink_ext_ack *extack); 359 int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb, 360 struct nlattr *rate_tlv, struct tcf_exts *exts, 361 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); 362 void tcf_exts_destroy(struct tcf_exts *exts); 363 void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); 364 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); 365 int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); 366 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); 367 368 /** 369 * struct tcf_pkt_info - packet information 370 * 371 * @ptr: start of the pkt data 372 * @nexthdr: offset of the next header 373 */ 374 struct tcf_pkt_info { 375 unsigned char * ptr; 376 int nexthdr; 377 }; 378 379 #ifdef CONFIG_NET_EMATCH 380 381 struct tcf_ematch_ops; 382 383 /** 384 * struct tcf_ematch - extended match (ematch) 385 * 386 * @matchid: identifier to allow userspace to reidentify a match 387 * @flags: flags specifying attributes and the relation to other matches 388 * @ops: the operations lookup table of the corresponding ematch module 389 * @datalen: length of the ematch specific configuration data 390 * @data: ematch specific data 391 * @net: the network namespace 392 */ 393 struct tcf_ematch { 394 struct tcf_ematch_ops * ops; 395 unsigned long data; 396 unsigned int datalen; 397 u16 matchid; 398 u16 flags; 399 struct net *net; 400 }; 401 402 static inline int tcf_em_is_container(struct tcf_ematch *em) 403 { 404 return !em->ops; 405 } 406 407 static inline int tcf_em_is_simple(struct tcf_ematch *em) 408 { 409 return em->flags & TCF_EM_SIMPLE; 410 } 411 412 static inline int tcf_em_is_inverted(struct tcf_ematch *em) 413 { 414 return em->flags & TCF_EM_INVERT; 415 } 416 417 static inline int tcf_em_last_match(struct tcf_ematch *em) 418 { 419 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; 420 } 421 422 static inline int tcf_em_early_end(struct tcf_ematch *em, int result) 423 { 424 if (tcf_em_last_match(em)) 425 return 1; 426 427 if (result == 0 && em->flags & TCF_EM_REL_AND) 428 return 1; 429 430 if (result != 0 && em->flags & TCF_EM_REL_OR) 431 return 1; 432 433 return 0; 434 } 435 436 /** 437 * struct tcf_ematch_tree - ematch tree handle 438 * 439 * @hdr: ematch tree header supplied by userspace 440 * @matches: array of ematches 441 */ 442 struct tcf_ematch_tree { 443 struct tcf_ematch_tree_hdr hdr; 444 struct tcf_ematch * matches; 445 446 }; 447 448 /** 449 * struct tcf_ematch_ops - ematch module operations 450 * 451 * @kind: identifier (kind) of this ematch module 452 * @datalen: length of expected configuration data (optional) 453 * @change: called during validation (optional) 454 * @match: called during ematch tree evaluation, must return 1/0 455 * @destroy: called during destroyage (optional) 456 * @dump: called during dumping process (optional) 457 * @owner: owner, must be set to THIS_MODULE 458 * @link: link to previous/next ematch module (internal use) 459 */ 460 struct tcf_ematch_ops { 461 int kind; 462 int datalen; 463 int (*change)(struct net *net, void *, 464 int, struct tcf_ematch *); 465 int (*match)(struct sk_buff *, struct tcf_ematch *, 466 struct tcf_pkt_info *); 467 void (*destroy)(struct tcf_ematch *); 468 int (*dump)(struct sk_buff *, struct tcf_ematch *); 469 struct module *owner; 470 struct list_head link; 471 }; 472 473 int tcf_em_register(struct tcf_ematch_ops *); 474 void tcf_em_unregister(struct tcf_ematch_ops *); 475 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, 476 struct tcf_ematch_tree *); 477 void tcf_em_tree_destroy(struct tcf_ematch_tree *); 478 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); 479 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, 480 struct tcf_pkt_info *); 481 482 /** 483 * tcf_em_tree_match - evaulate an ematch tree 484 * 485 * @skb: socket buffer of the packet in question 486 * @tree: ematch tree to be used for evaluation 487 * @info: packet information examined by classifier 488 * 489 * This function matches @skb against the ematch tree in @tree by going 490 * through all ematches respecting their logic relations returning 491 * as soon as the result is obvious. 492 * 493 * Returns 1 if the ematch tree as-one matches, no ematches are configured 494 * or ematch is not enabled in the kernel, otherwise 0 is returned. 495 */ 496 static inline int tcf_em_tree_match(struct sk_buff *skb, 497 struct tcf_ematch_tree *tree, 498 struct tcf_pkt_info *info) 499 { 500 if (tree->hdr.nmatches) 501 return __tcf_em_tree_match(skb, tree, info); 502 else 503 return 1; 504 } 505 506 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) 507 508 #else /* CONFIG_NET_EMATCH */ 509 510 struct tcf_ematch_tree { 511 }; 512 513 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) 514 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) 515 #define tcf_em_tree_dump(skb, t, tlv) (0) 516 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) 517 518 #endif /* CONFIG_NET_EMATCH */ 519 520 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) 521 { 522 switch (layer) { 523 case TCF_LAYER_LINK: 524 return skb_mac_header(skb); 525 case TCF_LAYER_NETWORK: 526 return skb_network_header(skb); 527 case TCF_LAYER_TRANSPORT: 528 return skb_transport_header(skb); 529 } 530 531 return NULL; 532 } 533 534 static inline int tcf_valid_offset(const struct sk_buff *skb, 535 const unsigned char *ptr, const int len) 536 { 537 return likely((ptr + len) <= skb_tail_pointer(skb) && 538 ptr >= skb->head && 539 (ptr <= (ptr + len))); 540 } 541 542 static inline int 543 tcf_change_indev(struct net *net, struct nlattr *indev_tlv, 544 struct netlink_ext_ack *extack) 545 { 546 char indev[IFNAMSIZ]; 547 struct net_device *dev; 548 549 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) { 550 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 551 "Interface name too long"); 552 return -EINVAL; 553 } 554 dev = __dev_get_by_name(net, indev); 555 if (!dev) { 556 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 557 "Network device not found"); 558 return -ENODEV; 559 } 560 return dev->ifindex; 561 } 562 563 static inline bool 564 tcf_match_indev(struct sk_buff *skb, int ifindex) 565 { 566 if (!ifindex) 567 return true; 568 if (!skb->skb_iif) 569 return false; 570 return ifindex == skb->skb_iif; 571 } 572 573 int tc_setup_offload_action(struct flow_action *flow_action, 574 const struct tcf_exts *exts, 575 struct netlink_ext_ack *extack); 576 void tc_cleanup_offload_action(struct flow_action *flow_action); 577 int tc_setup_action(struct flow_action *flow_action, 578 struct tc_action *actions[], 579 u32 miss_cookie_base, 580 struct netlink_ext_ack *extack); 581 582 int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, 583 void *type_data, bool err_stop, bool rtnl_held); 584 int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, 585 enum tc_setup_type type, void *type_data, bool err_stop, 586 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 587 int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, 588 enum tc_setup_type type, void *type_data, bool err_stop, 589 u32 *old_flags, unsigned int *old_in_hw_count, 590 u32 *new_flags, unsigned int *new_in_hw_count, 591 bool rtnl_held); 592 int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, 593 enum tc_setup_type type, void *type_data, bool err_stop, 594 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 595 int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, 596 bool add, flow_setup_cb_t *cb, 597 enum tc_setup_type type, void *type_data, 598 void *cb_priv, u32 *flags, unsigned int *in_hw_count); 599 unsigned int tcf_exts_num_actions(struct tcf_exts *exts); 600 601 #ifdef CONFIG_NET_CLS_ACT 602 int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 603 enum flow_block_binder_type binder_type, 604 struct nlattr *block_index_attr, 605 struct netlink_ext_ack *extack); 606 void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch); 607 int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 608 struct netlink_ext_ack *extack); 609 struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 610 struct sk_buff **to_free, int *ret); 611 int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe); 612 #else 613 static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 614 enum flow_block_binder_type binder_type, 615 struct nlattr *block_index_attr, 616 struct netlink_ext_ack *extack) 617 { 618 return 0; 619 } 620 621 static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch) 622 { 623 } 624 625 static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 626 struct netlink_ext_ack *extack) 627 { 628 return 0; 629 } 630 631 static inline struct sk_buff * 632 tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 633 struct sk_buff **to_free, int *ret) 634 { 635 return skb; 636 } 637 638 static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe) 639 { 640 return 0; 641 } 642 #endif 643 644 struct tc_cls_u32_knode { 645 struct tcf_exts *exts; 646 struct tcf_result *res; 647 struct tc_u32_sel *sel; 648 u32 handle; 649 u32 val; 650 u32 mask; 651 u32 link_handle; 652 u8 fshift; 653 }; 654 655 struct tc_cls_u32_hnode { 656 u32 handle; 657 u32 prio; 658 unsigned int divisor; 659 }; 660 661 enum tc_clsu32_command { 662 TC_CLSU32_NEW_KNODE, 663 TC_CLSU32_REPLACE_KNODE, 664 TC_CLSU32_DELETE_KNODE, 665 TC_CLSU32_NEW_HNODE, 666 TC_CLSU32_REPLACE_HNODE, 667 TC_CLSU32_DELETE_HNODE, 668 }; 669 670 struct tc_cls_u32_offload { 671 struct flow_cls_common_offload common; 672 /* knode values */ 673 enum tc_clsu32_command command; 674 union { 675 struct tc_cls_u32_knode knode; 676 struct tc_cls_u32_hnode hnode; 677 }; 678 }; 679 680 static inline bool tc_can_offload(const struct net_device *dev) 681 { 682 return dev->features & NETIF_F_HW_TC; 683 } 684 685 static inline bool tc_can_offload_extack(const struct net_device *dev, 686 struct netlink_ext_ack *extack) 687 { 688 bool can = tc_can_offload(dev); 689 690 if (!can) 691 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device"); 692 693 return can; 694 } 695 696 static inline bool 697 tc_cls_can_offload_and_chain0(const struct net_device *dev, 698 struct flow_cls_common_offload *common) 699 { 700 if (!tc_can_offload_extack(dev, common->extack)) 701 return false; 702 if (common->chain_index) { 703 NL_SET_ERR_MSG(common->extack, 704 "Driver supports only offload of chain 0"); 705 return false; 706 } 707 return true; 708 } 709 710 static inline bool tc_skip_hw(u32 flags) 711 { 712 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; 713 } 714 715 static inline bool tc_skip_sw(u32 flags) 716 { 717 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; 718 } 719 720 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ 721 static inline bool tc_flags_valid(u32 flags) 722 { 723 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | 724 TCA_CLS_FLAGS_VERBOSE)) 725 return false; 726 727 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; 728 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) 729 return false; 730 731 return true; 732 } 733 734 static inline bool tc_in_hw(u32 flags) 735 { 736 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; 737 } 738 739 static inline void 740 tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, 741 const struct tcf_proto *tp, u32 flags, 742 struct netlink_ext_ack *extack) 743 { 744 cls_common->chain_index = tp->chain->index; 745 cls_common->protocol = tp->protocol; 746 cls_common->prio = tp->prio >> 16; 747 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) 748 cls_common->extack = extack; 749 } 750 751 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 752 static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb) 753 { 754 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT); 755 756 if (tc_skb_ext) 757 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext)); 758 return tc_skb_ext; 759 } 760 #endif 761 762 enum tc_matchall_command { 763 TC_CLSMATCHALL_REPLACE, 764 TC_CLSMATCHALL_DESTROY, 765 TC_CLSMATCHALL_STATS, 766 }; 767 768 struct tc_cls_matchall_offload { 769 struct flow_cls_common_offload common; 770 enum tc_matchall_command command; 771 struct flow_rule *rule; 772 struct flow_stats stats; 773 bool use_act_stats; 774 unsigned long cookie; 775 }; 776 777 enum tc_clsbpf_command { 778 TC_CLSBPF_OFFLOAD, 779 TC_CLSBPF_STATS, 780 }; 781 782 struct tc_cls_bpf_offload { 783 struct flow_cls_common_offload common; 784 enum tc_clsbpf_command command; 785 struct tcf_exts *exts; 786 struct bpf_prog *prog; 787 struct bpf_prog *oldprog; 788 const char *name; 789 bool exts_integrated; 790 }; 791 792 /* This structure holds cookie structure that is passed from user 793 * to the kernel for actions and classifiers 794 */ 795 struct tc_cookie { 796 u8 *data; 797 u32 len; 798 struct rcu_head rcu; 799 }; 800 801 struct tc_qopt_offload_stats { 802 struct gnet_stats_basic_sync *bstats; 803 struct gnet_stats_queue *qstats; 804 }; 805 806 enum tc_mq_command { 807 TC_MQ_CREATE, 808 TC_MQ_DESTROY, 809 TC_MQ_STATS, 810 TC_MQ_GRAFT, 811 }; 812 813 struct tc_mq_opt_offload_graft_params { 814 unsigned long queue; 815 u32 child_handle; 816 }; 817 818 struct tc_mq_qopt_offload { 819 enum tc_mq_command command; 820 u32 handle; 821 union { 822 struct tc_qopt_offload_stats stats; 823 struct tc_mq_opt_offload_graft_params graft_params; 824 }; 825 }; 826 827 enum tc_htb_command { 828 /* Root */ 829 TC_HTB_CREATE, /* Initialize HTB offload. */ 830 TC_HTB_DESTROY, /* Destroy HTB offload. */ 831 832 /* Classes */ 833 /* Allocate qid and create leaf. */ 834 TC_HTB_LEAF_ALLOC_QUEUE, 835 /* Convert leaf to inner, preserve and return qid, create new leaf. */ 836 TC_HTB_LEAF_TO_INNER, 837 /* Delete leaf, while siblings remain. */ 838 TC_HTB_LEAF_DEL, 839 /* Delete leaf, convert parent to leaf, preserving qid. */ 840 TC_HTB_LEAF_DEL_LAST, 841 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ 842 TC_HTB_LEAF_DEL_LAST_FORCE, 843 /* Modify parameters of a node. */ 844 TC_HTB_NODE_MODIFY, 845 846 /* Class qdisc */ 847 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ 848 }; 849 850 struct tc_htb_qopt_offload { 851 struct netlink_ext_ack *extack; 852 enum tc_htb_command command; 853 u32 parent_classid; 854 u16 classid; 855 u16 qid; 856 u32 quantum; 857 u64 rate; 858 u64 ceil; 859 u8 prio; 860 }; 861 862 #define TC_HTB_CLASSID_ROOT U32_MAX 863 864 enum tc_red_command { 865 TC_RED_REPLACE, 866 TC_RED_DESTROY, 867 TC_RED_STATS, 868 TC_RED_XSTATS, 869 TC_RED_GRAFT, 870 }; 871 872 struct tc_red_qopt_offload_params { 873 u32 min; 874 u32 max; 875 u32 probability; 876 u32 limit; 877 bool is_ecn; 878 bool is_harddrop; 879 bool is_nodrop; 880 struct gnet_stats_queue *qstats; 881 }; 882 883 struct tc_red_qopt_offload { 884 enum tc_red_command command; 885 u32 handle; 886 u32 parent; 887 union { 888 struct tc_red_qopt_offload_params set; 889 struct tc_qopt_offload_stats stats; 890 struct red_stats *xstats; 891 u32 child_handle; 892 }; 893 }; 894 895 enum tc_gred_command { 896 TC_GRED_REPLACE, 897 TC_GRED_DESTROY, 898 TC_GRED_STATS, 899 }; 900 901 struct tc_gred_vq_qopt_offload_params { 902 bool present; 903 u32 limit; 904 u32 prio; 905 u32 min; 906 u32 max; 907 bool is_ecn; 908 bool is_harddrop; 909 u32 probability; 910 /* Only need backlog, see struct tc_prio_qopt_offload_params */ 911 u32 *backlog; 912 }; 913 914 struct tc_gred_qopt_offload_params { 915 bool grio_on; 916 bool wred_on; 917 unsigned int dp_cnt; 918 unsigned int dp_def; 919 struct gnet_stats_queue *qstats; 920 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; 921 }; 922 923 struct tc_gred_qopt_offload_stats { 924 struct gnet_stats_basic_sync bstats[MAX_DPs]; 925 struct gnet_stats_queue qstats[MAX_DPs]; 926 struct red_stats *xstats[MAX_DPs]; 927 }; 928 929 struct tc_gred_qopt_offload { 930 enum tc_gred_command command; 931 u32 handle; 932 u32 parent; 933 union { 934 struct tc_gred_qopt_offload_params set; 935 struct tc_gred_qopt_offload_stats stats; 936 }; 937 }; 938 939 enum tc_prio_command { 940 TC_PRIO_REPLACE, 941 TC_PRIO_DESTROY, 942 TC_PRIO_STATS, 943 TC_PRIO_GRAFT, 944 }; 945 946 struct tc_prio_qopt_offload_params { 947 int bands; 948 u8 priomap[TC_PRIO_MAX + 1]; 949 /* At the point of un-offloading the Qdisc, the reported backlog and 950 * qlen need to be reduced by the portion that is in HW. 951 */ 952 struct gnet_stats_queue *qstats; 953 }; 954 955 struct tc_prio_qopt_offload_graft_params { 956 u8 band; 957 u32 child_handle; 958 }; 959 960 struct tc_prio_qopt_offload { 961 enum tc_prio_command command; 962 u32 handle; 963 u32 parent; 964 union { 965 struct tc_prio_qopt_offload_params replace_params; 966 struct tc_qopt_offload_stats stats; 967 struct tc_prio_qopt_offload_graft_params graft_params; 968 }; 969 }; 970 971 enum tc_root_command { 972 TC_ROOT_GRAFT, 973 }; 974 975 struct tc_root_qopt_offload { 976 enum tc_root_command command; 977 u32 handle; 978 bool ingress; 979 }; 980 981 enum tc_ets_command { 982 TC_ETS_REPLACE, 983 TC_ETS_DESTROY, 984 TC_ETS_STATS, 985 TC_ETS_GRAFT, 986 }; 987 988 struct tc_ets_qopt_offload_replace_params { 989 unsigned int bands; 990 u8 priomap[TC_PRIO_MAX + 1]; 991 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ 992 unsigned int weights[TCQ_ETS_MAX_BANDS]; 993 struct gnet_stats_queue *qstats; 994 }; 995 996 struct tc_ets_qopt_offload_graft_params { 997 u8 band; 998 u32 child_handle; 999 }; 1000 1001 struct tc_ets_qopt_offload { 1002 enum tc_ets_command command; 1003 u32 handle; 1004 u32 parent; 1005 union { 1006 struct tc_ets_qopt_offload_replace_params replace_params; 1007 struct tc_qopt_offload_stats stats; 1008 struct tc_ets_qopt_offload_graft_params graft_params; 1009 }; 1010 }; 1011 1012 enum tc_tbf_command { 1013 TC_TBF_REPLACE, 1014 TC_TBF_DESTROY, 1015 TC_TBF_STATS, 1016 TC_TBF_GRAFT, 1017 }; 1018 1019 struct tc_tbf_qopt_offload_replace_params { 1020 struct psched_ratecfg rate; 1021 u32 max_size; 1022 struct gnet_stats_queue *qstats; 1023 }; 1024 1025 struct tc_tbf_qopt_offload { 1026 enum tc_tbf_command command; 1027 u32 handle; 1028 u32 parent; 1029 union { 1030 struct tc_tbf_qopt_offload_replace_params replace_params; 1031 struct tc_qopt_offload_stats stats; 1032 u32 child_handle; 1033 }; 1034 }; 1035 1036 enum tc_fifo_command { 1037 TC_FIFO_REPLACE, 1038 TC_FIFO_DESTROY, 1039 TC_FIFO_STATS, 1040 }; 1041 1042 struct tc_fifo_qopt_offload { 1043 enum tc_fifo_command command; 1044 u32 handle; 1045 u32 parent; 1046 union { 1047 struct tc_qopt_offload_stats stats; 1048 }; 1049 }; 1050 1051 #ifdef CONFIG_NET_CLS_ACT 1052 DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc); 1053 void tc_skb_ext_tc_enable(void); 1054 void tc_skb_ext_tc_disable(void); 1055 #define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc) 1056 #else /* CONFIG_NET_CLS_ACT */ 1057 static inline void tc_skb_ext_tc_enable(void) { } 1058 static inline void tc_skb_ext_tc_disable(void) { } 1059 #define tc_skb_ext_tc_enabled() false 1060 #endif 1061 1062 #endif 1063