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 #define NET_CLS_ALIAS_PREFIX "net-cls-" 28 #define MODULE_ALIAS_NET_CLS(kind) MODULE_ALIAS(NET_CLS_ALIAS_PREFIX kind) 29 30 struct tcf_block_ext_info { 31 enum flow_block_binder_type binder_type; 32 tcf_chain_head_change_t *chain_head_change; 33 void *chain_head_change_priv; 34 u32 block_index; 35 }; 36 37 struct tcf_qevent { 38 struct tcf_block *block; 39 struct tcf_block_ext_info info; 40 struct tcf_proto __rcu *filter_chain; 41 }; 42 43 struct tcf_block_cb; 44 bool tcf_queue_work(struct rcu_work *rwork, work_func_t func); 45 46 #ifdef CONFIG_NET_CLS 47 struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block, 48 u32 chain_index); 49 void tcf_chain_put_by_act(struct tcf_chain *chain); 50 struct tcf_chain *tcf_get_next_chain(struct tcf_block *block, 51 struct tcf_chain *chain); 52 struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain, 53 struct tcf_proto *tp); 54 void tcf_block_netif_keep_dst(struct tcf_block *block); 55 int tcf_block_get(struct tcf_block **p_block, 56 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, 57 struct netlink_ext_ack *extack); 58 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, 59 struct tcf_block_ext_info *ei, 60 struct netlink_ext_ack *extack); 61 void tcf_block_put(struct tcf_block *block); 62 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, 63 struct tcf_block_ext_info *ei); 64 int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action, 65 int police, struct tcf_proto *tp, u32 handle, bool used_action_miss); 66 67 static inline bool tcf_block_shared(struct tcf_block *block) 68 { 69 return block->index; 70 } 71 72 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 73 { 74 return block && block->index; 75 } 76 77 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 78 { 79 WARN_ON(tcf_block_shared(block)); 80 return block->q; 81 } 82 83 int tcf_classify(struct sk_buff *skb, 84 const struct tcf_block *block, 85 const struct tcf_proto *tp, struct tcf_result *res, 86 bool compat_mode); 87 88 static inline bool tc_cls_stats_dump(struct tcf_proto *tp, 89 struct tcf_walker *arg, 90 void *filter) 91 { 92 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) { 93 arg->stop = 1; 94 return false; 95 } 96 97 arg->count++; 98 return true; 99 } 100 101 #else 102 static inline bool tcf_block_shared(struct tcf_block *block) 103 { 104 return false; 105 } 106 107 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 108 { 109 return false; 110 } 111 112 static inline 113 int tcf_block_get(struct tcf_block **p_block, 114 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, 115 struct netlink_ext_ack *extack) 116 { 117 return 0; 118 } 119 120 static inline 121 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, 122 struct tcf_block_ext_info *ei, 123 struct netlink_ext_ack *extack) 124 { 125 return 0; 126 } 127 128 static inline void tcf_block_put(struct tcf_block *block) 129 { 130 } 131 132 static inline 133 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, 134 struct tcf_block_ext_info *ei) 135 { 136 } 137 138 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 139 { 140 return NULL; 141 } 142 143 static inline int tcf_classify(struct sk_buff *skb, 144 const struct tcf_block *block, 145 const struct tcf_proto *tp, 146 struct tcf_result *res, bool compat_mode) 147 { 148 return TC_ACT_UNSPEC; 149 } 150 151 #endif 152 153 static inline unsigned long 154 __cls_set_class(unsigned long *clp, unsigned long cl) 155 { 156 return xchg(clp, cl); 157 } 158 159 static inline void 160 __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) 161 { 162 unsigned long cl; 163 164 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); 165 cl = __cls_set_class(&r->class, cl); 166 if (cl) 167 q->ops->cl_ops->unbind_tcf(q, cl); 168 } 169 170 static inline void 171 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) 172 { 173 struct Qdisc *q = tp->chain->block->q; 174 175 /* Check q as it is not set for shared blocks. In that case, 176 * setting class is not supported. 177 */ 178 if (!q) 179 return; 180 sch_tree_lock(q); 181 __tcf_bind_filter(q, r, base); 182 sch_tree_unlock(q); 183 } 184 185 static inline void 186 __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) 187 { 188 unsigned long cl; 189 190 if ((cl = __cls_set_class(&r->class, 0)) != 0) 191 q->ops->cl_ops->unbind_tcf(q, cl); 192 } 193 194 static inline void 195 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) 196 { 197 struct Qdisc *q = tp->chain->block->q; 198 199 if (!q) 200 return; 201 __tcf_unbind_filter(q, r); 202 } 203 204 static inline void tc_cls_bind_class(u32 classid, unsigned long cl, 205 void *q, struct tcf_result *res, 206 unsigned long base) 207 { 208 if (res->classid == classid) { 209 if (cl) 210 __tcf_bind_filter(q, res, base); 211 else 212 __tcf_unbind_filter(q, res); 213 } 214 } 215 216 struct tcf_exts { 217 #ifdef CONFIG_NET_CLS_ACT 218 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 219 int nr_actions; 220 struct tc_action **actions; 221 struct net *net; 222 netns_tracker ns_tracker; 223 struct tcf_exts_miss_cookie_node *miss_cookie_node; 224 #endif 225 /* Map to export classifier specific extension TLV types to the 226 * generic extensions API. Unsupported extensions must be set to 0. 227 */ 228 int action; 229 int police; 230 }; 231 232 static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, 233 int action, int police) 234 { 235 #ifdef CONFIG_NET_CLS 236 return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false); 237 #else 238 return -EOPNOTSUPP; 239 #endif 240 } 241 242 /* Return false if the netns is being destroyed in cleanup_net(). Callers 243 * need to do cleanup synchronously in this case, otherwise may race with 244 * tc_action_net_exit(). Return true for other cases. 245 */ 246 static inline bool tcf_exts_get_net(struct tcf_exts *exts) 247 { 248 #ifdef CONFIG_NET_CLS_ACT 249 exts->net = maybe_get_net(exts->net); 250 if (exts->net) 251 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL); 252 return exts->net != NULL; 253 #else 254 return true; 255 #endif 256 } 257 258 static inline void tcf_exts_put_net(struct tcf_exts *exts) 259 { 260 #ifdef CONFIG_NET_CLS_ACT 261 if (exts->net) 262 put_net_track(exts->net, &exts->ns_tracker); 263 #endif 264 } 265 266 #ifdef CONFIG_NET_CLS_ACT 267 #define tcf_exts_for_each_action(i, a, exts) \ 268 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) 269 #else 270 #define tcf_exts_for_each_action(i, a, exts) \ 271 for (; 0; (void)(i), (void)(a), (void)(exts)) 272 #endif 273 274 #define tcf_act_for_each_action(i, a, actions) \ 275 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) 276 277 static inline bool tc_act_in_hw(struct tc_action *act) 278 { 279 return !!act->in_hw_count; 280 } 281 282 static inline void 283 tcf_exts_hw_stats_update(const struct tcf_exts *exts, 284 struct flow_stats *stats, 285 bool use_act_stats) 286 { 287 #ifdef CONFIG_NET_CLS_ACT 288 int i; 289 290 for (i = 0; i < exts->nr_actions; i++) { 291 struct tc_action *a = exts->actions[i]; 292 293 if (use_act_stats || tc_act_in_hw(a)) { 294 if (!tcf_action_update_hw_stats(a)) 295 continue; 296 } 297 298 preempt_disable(); 299 tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops, 300 stats->lastused, true); 301 preempt_enable(); 302 303 a->used_hw_stats = stats->used_hw_stats; 304 a->used_hw_stats_valid = stats->used_hw_stats_valid; 305 } 306 #endif 307 } 308 309 /** 310 * tcf_exts_has_actions - check if at least one action is present 311 * @exts: tc filter extensions handle 312 * 313 * Returns true if at least one action is present. 314 */ 315 static inline bool tcf_exts_has_actions(struct tcf_exts *exts) 316 { 317 #ifdef CONFIG_NET_CLS_ACT 318 return exts->nr_actions; 319 #else 320 return false; 321 #endif 322 } 323 324 /** 325 * tcf_exts_exec - execute tc filter extensions 326 * @skb: socket buffer 327 * @exts: tc filter extensions handle 328 * @res: desired result 329 * 330 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, 331 * a negative number if the filter must be considered unmatched or 332 * a positive action code (TC_ACT_*) which must be returned to the 333 * underlying layer. 334 */ 335 static inline int 336 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, 337 struct tcf_result *res) 338 { 339 #ifdef CONFIG_NET_CLS_ACT 340 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); 341 #endif 342 return TC_ACT_OK; 343 } 344 345 static inline int 346 tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index, 347 struct tcf_result *res) 348 { 349 #ifdef CONFIG_NET_CLS_ACT 350 return tcf_action_exec(skb, exts->actions + act_index, 351 exts->nr_actions - act_index, res); 352 #else 353 return TC_ACT_OK; 354 #endif 355 } 356 357 int tcf_exts_validate(struct net *net, struct tcf_proto *tp, 358 struct nlattr **tb, struct nlattr *rate_tlv, 359 struct tcf_exts *exts, u32 flags, 360 struct netlink_ext_ack *extack); 361 int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb, 362 struct nlattr *rate_tlv, struct tcf_exts *exts, 363 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); 364 void tcf_exts_destroy(struct tcf_exts *exts); 365 void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); 366 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); 367 int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); 368 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); 369 370 /** 371 * struct tcf_pkt_info - packet information 372 * 373 * @ptr: start of the pkt data 374 * @nexthdr: offset of the next header 375 */ 376 struct tcf_pkt_info { 377 unsigned char * ptr; 378 int nexthdr; 379 }; 380 381 #ifdef CONFIG_NET_EMATCH 382 383 struct tcf_ematch_ops; 384 385 /** 386 * struct tcf_ematch - extended match (ematch) 387 * 388 * @matchid: identifier to allow userspace to reidentify a match 389 * @flags: flags specifying attributes and the relation to other matches 390 * @ops: the operations lookup table of the corresponding ematch module 391 * @datalen: length of the ematch specific configuration data 392 * @data: ematch specific data 393 * @net: the network namespace 394 */ 395 struct tcf_ematch { 396 struct tcf_ematch_ops * ops; 397 unsigned long data; 398 unsigned int datalen; 399 u16 matchid; 400 u16 flags; 401 struct net *net; 402 }; 403 404 static inline int tcf_em_is_container(struct tcf_ematch *em) 405 { 406 return !em->ops; 407 } 408 409 static inline int tcf_em_is_simple(struct tcf_ematch *em) 410 { 411 return em->flags & TCF_EM_SIMPLE; 412 } 413 414 static inline int tcf_em_is_inverted(struct tcf_ematch *em) 415 { 416 return em->flags & TCF_EM_INVERT; 417 } 418 419 static inline int tcf_em_last_match(struct tcf_ematch *em) 420 { 421 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; 422 } 423 424 static inline int tcf_em_early_end(struct tcf_ematch *em, int result) 425 { 426 if (tcf_em_last_match(em)) 427 return 1; 428 429 if (result == 0 && em->flags & TCF_EM_REL_AND) 430 return 1; 431 432 if (result != 0 && em->flags & TCF_EM_REL_OR) 433 return 1; 434 435 return 0; 436 } 437 438 /** 439 * struct tcf_ematch_tree - ematch tree handle 440 * 441 * @hdr: ematch tree header supplied by userspace 442 * @matches: array of ematches 443 */ 444 struct tcf_ematch_tree { 445 struct tcf_ematch_tree_hdr hdr; 446 struct tcf_ematch * matches; 447 448 }; 449 450 /** 451 * struct tcf_ematch_ops - ematch module operations 452 * 453 * @kind: identifier (kind) of this ematch module 454 * @datalen: length of expected configuration data (optional) 455 * @change: called during validation (optional) 456 * @match: called during ematch tree evaluation, must return 1/0 457 * @destroy: called during destroyage (optional) 458 * @dump: called during dumping process (optional) 459 * @owner: owner, must be set to THIS_MODULE 460 * @link: link to previous/next ematch module (internal use) 461 */ 462 struct tcf_ematch_ops { 463 int kind; 464 int datalen; 465 int (*change)(struct net *net, void *, 466 int, struct tcf_ematch *); 467 int (*match)(struct sk_buff *, struct tcf_ematch *, 468 struct tcf_pkt_info *); 469 void (*destroy)(struct tcf_ematch *); 470 int (*dump)(struct sk_buff *, struct tcf_ematch *); 471 struct module *owner; 472 struct list_head link; 473 }; 474 475 int tcf_em_register(struct tcf_ematch_ops *); 476 void tcf_em_unregister(struct tcf_ematch_ops *); 477 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, 478 struct tcf_ematch_tree *); 479 void tcf_em_tree_destroy(struct tcf_ematch_tree *); 480 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); 481 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, 482 struct tcf_pkt_info *); 483 484 /** 485 * tcf_em_tree_match - evaulate an ematch tree 486 * 487 * @skb: socket buffer of the packet in question 488 * @tree: ematch tree to be used for evaluation 489 * @info: packet information examined by classifier 490 * 491 * This function matches @skb against the ematch tree in @tree by going 492 * through all ematches respecting their logic relations returning 493 * as soon as the result is obvious. 494 * 495 * Returns 1 if the ematch tree as-one matches, no ematches are configured 496 * or ematch is not enabled in the kernel, otherwise 0 is returned. 497 */ 498 static inline int tcf_em_tree_match(struct sk_buff *skb, 499 struct tcf_ematch_tree *tree, 500 struct tcf_pkt_info *info) 501 { 502 if (tree->hdr.nmatches) 503 return __tcf_em_tree_match(skb, tree, info); 504 else 505 return 1; 506 } 507 508 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) 509 510 #else /* CONFIG_NET_EMATCH */ 511 512 struct tcf_ematch_tree { 513 }; 514 515 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) 516 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) 517 #define tcf_em_tree_dump(skb, t, tlv) (0) 518 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) 519 520 #endif /* CONFIG_NET_EMATCH */ 521 522 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) 523 { 524 switch (layer) { 525 case TCF_LAYER_LINK: 526 return skb_mac_header(skb); 527 case TCF_LAYER_NETWORK: 528 return skb_network_header(skb); 529 case TCF_LAYER_TRANSPORT: 530 return skb_transport_header(skb); 531 } 532 533 return NULL; 534 } 535 536 static inline int tcf_valid_offset(const struct sk_buff *skb, 537 const unsigned char *ptr, const int len) 538 { 539 return likely((ptr + len) <= skb_tail_pointer(skb) && 540 ptr >= skb->head && 541 (ptr <= (ptr + len))); 542 } 543 544 static inline int 545 tcf_change_indev(struct net *net, struct nlattr *indev_tlv, 546 struct netlink_ext_ack *extack) 547 { 548 char indev[IFNAMSIZ]; 549 struct net_device *dev; 550 551 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) { 552 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 553 "Interface name too long"); 554 return -EINVAL; 555 } 556 dev = __dev_get_by_name(net, indev); 557 if (!dev) { 558 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 559 "Network device not found"); 560 return -ENODEV; 561 } 562 return dev->ifindex; 563 } 564 565 static inline bool 566 tcf_match_indev(struct sk_buff *skb, int ifindex) 567 { 568 if (!ifindex) 569 return true; 570 if (!skb->skb_iif) 571 return false; 572 return ifindex == skb->skb_iif; 573 } 574 575 int tc_setup_offload_action(struct flow_action *flow_action, 576 const struct tcf_exts *exts, 577 struct netlink_ext_ack *extack); 578 void tc_cleanup_offload_action(struct flow_action *flow_action); 579 int tc_setup_action(struct flow_action *flow_action, 580 struct tc_action *actions[], 581 u32 miss_cookie_base, 582 struct netlink_ext_ack *extack); 583 584 int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, 585 void *type_data, bool err_stop, bool rtnl_held); 586 int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, 587 enum tc_setup_type type, void *type_data, bool err_stop, 588 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 589 int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, 590 enum tc_setup_type type, void *type_data, bool err_stop, 591 u32 *old_flags, unsigned int *old_in_hw_count, 592 u32 *new_flags, unsigned int *new_in_hw_count, 593 bool rtnl_held); 594 int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, 595 enum tc_setup_type type, void *type_data, bool err_stop, 596 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 597 int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, 598 bool add, flow_setup_cb_t *cb, 599 enum tc_setup_type type, void *type_data, 600 void *cb_priv, u32 *flags, unsigned int *in_hw_count); 601 unsigned int tcf_exts_num_actions(struct tcf_exts *exts); 602 603 #ifdef CONFIG_NET_CLS_ACT 604 int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 605 enum flow_block_binder_type binder_type, 606 struct nlattr *block_index_attr, 607 struct netlink_ext_ack *extack); 608 void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch); 609 int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 610 struct netlink_ext_ack *extack); 611 struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 612 struct sk_buff **to_free, int *ret); 613 int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe); 614 #else 615 static inline 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 { 620 return 0; 621 } 622 623 static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch) 624 { 625 } 626 627 static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 628 struct netlink_ext_ack *extack) 629 { 630 return 0; 631 } 632 633 static inline struct sk_buff * 634 tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 635 struct sk_buff **to_free, int *ret) 636 { 637 return skb; 638 } 639 640 static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe) 641 { 642 return 0; 643 } 644 #endif 645 646 struct tc_cls_u32_knode { 647 struct tcf_exts *exts; 648 struct tcf_result *res; 649 struct tc_u32_sel *sel; 650 u32 handle; 651 u32 val; 652 u32 mask; 653 u32 link_handle; 654 u8 fshift; 655 }; 656 657 struct tc_cls_u32_hnode { 658 u32 handle; 659 u32 prio; 660 unsigned int divisor; 661 }; 662 663 enum tc_clsu32_command { 664 TC_CLSU32_NEW_KNODE, 665 TC_CLSU32_REPLACE_KNODE, 666 TC_CLSU32_DELETE_KNODE, 667 TC_CLSU32_NEW_HNODE, 668 TC_CLSU32_REPLACE_HNODE, 669 TC_CLSU32_DELETE_HNODE, 670 }; 671 672 struct tc_cls_u32_offload { 673 struct flow_cls_common_offload common; 674 /* knode values */ 675 enum tc_clsu32_command command; 676 union { 677 struct tc_cls_u32_knode knode; 678 struct tc_cls_u32_hnode hnode; 679 }; 680 }; 681 682 static inline bool tc_can_offload(const struct net_device *dev) 683 { 684 return dev->features & NETIF_F_HW_TC; 685 } 686 687 static inline bool tc_can_offload_extack(const struct net_device *dev, 688 struct netlink_ext_ack *extack) 689 { 690 bool can = tc_can_offload(dev); 691 692 if (!can) 693 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device"); 694 695 return can; 696 } 697 698 static inline bool 699 tc_cls_can_offload_and_chain0(const struct net_device *dev, 700 struct flow_cls_common_offload *common) 701 { 702 if (!tc_can_offload_extack(dev, common->extack)) 703 return false; 704 if (common->chain_index) { 705 NL_SET_ERR_MSG(common->extack, 706 "Driver supports only offload of chain 0"); 707 return false; 708 } 709 return true; 710 } 711 712 static inline bool tc_skip_hw(u32 flags) 713 { 714 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; 715 } 716 717 static inline bool tc_skip_sw(u32 flags) 718 { 719 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; 720 } 721 722 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ 723 static inline bool tc_flags_valid(u32 flags) 724 { 725 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | 726 TCA_CLS_FLAGS_VERBOSE)) 727 return false; 728 729 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; 730 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) 731 return false; 732 733 return true; 734 } 735 736 static inline bool tc_in_hw(u32 flags) 737 { 738 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; 739 } 740 741 static inline void 742 tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, 743 const struct tcf_proto *tp, u32 flags, 744 struct netlink_ext_ack *extack) 745 { 746 cls_common->chain_index = tp->chain->index; 747 cls_common->protocol = tp->protocol; 748 cls_common->prio = tp->prio >> 16; 749 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) 750 cls_common->extack = extack; 751 } 752 753 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 754 static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb) 755 { 756 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT); 757 758 if (tc_skb_ext) 759 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext)); 760 return tc_skb_ext; 761 } 762 #endif 763 764 enum tc_matchall_command { 765 TC_CLSMATCHALL_REPLACE, 766 TC_CLSMATCHALL_DESTROY, 767 TC_CLSMATCHALL_STATS, 768 }; 769 770 struct tc_cls_matchall_offload { 771 struct flow_cls_common_offload common; 772 enum tc_matchall_command command; 773 struct flow_rule *rule; 774 struct flow_stats stats; 775 bool use_act_stats; 776 unsigned long cookie; 777 }; 778 779 enum tc_clsbpf_command { 780 TC_CLSBPF_OFFLOAD, 781 TC_CLSBPF_STATS, 782 }; 783 784 struct tc_cls_bpf_offload { 785 struct flow_cls_common_offload common; 786 enum tc_clsbpf_command command; 787 struct tcf_exts *exts; 788 struct bpf_prog *prog; 789 struct bpf_prog *oldprog; 790 const char *name; 791 bool exts_integrated; 792 }; 793 794 /* This structure holds cookie structure that is passed from user 795 * to the kernel for actions and classifiers 796 */ 797 struct tc_cookie { 798 u8 *data; 799 u32 len; 800 struct rcu_head rcu; 801 }; 802 803 struct tc_qopt_offload_stats { 804 struct gnet_stats_basic_sync *bstats; 805 struct gnet_stats_queue *qstats; 806 }; 807 808 enum tc_mq_command { 809 TC_MQ_CREATE, 810 TC_MQ_DESTROY, 811 TC_MQ_STATS, 812 TC_MQ_GRAFT, 813 }; 814 815 struct tc_mq_opt_offload_graft_params { 816 unsigned long queue; 817 u32 child_handle; 818 }; 819 820 struct tc_mq_qopt_offload { 821 enum tc_mq_command command; 822 u32 handle; 823 union { 824 struct tc_qopt_offload_stats stats; 825 struct tc_mq_opt_offload_graft_params graft_params; 826 }; 827 }; 828 829 enum tc_htb_command { 830 /* Root */ 831 TC_HTB_CREATE, /* Initialize HTB offload. */ 832 TC_HTB_DESTROY, /* Destroy HTB offload. */ 833 834 /* Classes */ 835 /* Allocate qid and create leaf. */ 836 TC_HTB_LEAF_ALLOC_QUEUE, 837 /* Convert leaf to inner, preserve and return qid, create new leaf. */ 838 TC_HTB_LEAF_TO_INNER, 839 /* Delete leaf, while siblings remain. */ 840 TC_HTB_LEAF_DEL, 841 /* Delete leaf, convert parent to leaf, preserving qid. */ 842 TC_HTB_LEAF_DEL_LAST, 843 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ 844 TC_HTB_LEAF_DEL_LAST_FORCE, 845 /* Modify parameters of a node. */ 846 TC_HTB_NODE_MODIFY, 847 848 /* Class qdisc */ 849 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ 850 }; 851 852 struct tc_htb_qopt_offload { 853 struct netlink_ext_ack *extack; 854 enum tc_htb_command command; 855 u32 parent_classid; 856 u16 classid; 857 u16 qid; 858 u32 quantum; 859 u64 rate; 860 u64 ceil; 861 u8 prio; 862 }; 863 864 #define TC_HTB_CLASSID_ROOT U32_MAX 865 866 enum tc_red_command { 867 TC_RED_REPLACE, 868 TC_RED_DESTROY, 869 TC_RED_STATS, 870 TC_RED_XSTATS, 871 TC_RED_GRAFT, 872 }; 873 874 struct tc_red_qopt_offload_params { 875 u32 min; 876 u32 max; 877 u32 probability; 878 u32 limit; 879 bool is_ecn; 880 bool is_harddrop; 881 bool is_nodrop; 882 struct gnet_stats_queue *qstats; 883 }; 884 885 struct tc_red_qopt_offload { 886 enum tc_red_command command; 887 u32 handle; 888 u32 parent; 889 union { 890 struct tc_red_qopt_offload_params set; 891 struct tc_qopt_offload_stats stats; 892 struct red_stats *xstats; 893 u32 child_handle; 894 }; 895 }; 896 897 enum tc_gred_command { 898 TC_GRED_REPLACE, 899 TC_GRED_DESTROY, 900 TC_GRED_STATS, 901 }; 902 903 struct tc_gred_vq_qopt_offload_params { 904 bool present; 905 u32 limit; 906 u32 prio; 907 u32 min; 908 u32 max; 909 bool is_ecn; 910 bool is_harddrop; 911 u32 probability; 912 /* Only need backlog, see struct tc_prio_qopt_offload_params */ 913 u32 *backlog; 914 }; 915 916 struct tc_gred_qopt_offload_params { 917 bool grio_on; 918 bool wred_on; 919 unsigned int dp_cnt; 920 unsigned int dp_def; 921 struct gnet_stats_queue *qstats; 922 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; 923 }; 924 925 struct tc_gred_qopt_offload_stats { 926 struct gnet_stats_basic_sync bstats[MAX_DPs]; 927 struct gnet_stats_queue qstats[MAX_DPs]; 928 struct red_stats *xstats[MAX_DPs]; 929 }; 930 931 struct tc_gred_qopt_offload { 932 enum tc_gred_command command; 933 u32 handle; 934 u32 parent; 935 union { 936 struct tc_gred_qopt_offload_params set; 937 struct tc_gred_qopt_offload_stats stats; 938 }; 939 }; 940 941 enum tc_prio_command { 942 TC_PRIO_REPLACE, 943 TC_PRIO_DESTROY, 944 TC_PRIO_STATS, 945 TC_PRIO_GRAFT, 946 }; 947 948 struct tc_prio_qopt_offload_params { 949 int bands; 950 u8 priomap[TC_PRIO_MAX + 1]; 951 /* At the point of un-offloading the Qdisc, the reported backlog and 952 * qlen need to be reduced by the portion that is in HW. 953 */ 954 struct gnet_stats_queue *qstats; 955 }; 956 957 struct tc_prio_qopt_offload_graft_params { 958 u8 band; 959 u32 child_handle; 960 }; 961 962 struct tc_prio_qopt_offload { 963 enum tc_prio_command command; 964 u32 handle; 965 u32 parent; 966 union { 967 struct tc_prio_qopt_offload_params replace_params; 968 struct tc_qopt_offload_stats stats; 969 struct tc_prio_qopt_offload_graft_params graft_params; 970 }; 971 }; 972 973 enum tc_root_command { 974 TC_ROOT_GRAFT, 975 }; 976 977 struct tc_root_qopt_offload { 978 enum tc_root_command command; 979 u32 handle; 980 bool ingress; 981 }; 982 983 enum tc_ets_command { 984 TC_ETS_REPLACE, 985 TC_ETS_DESTROY, 986 TC_ETS_STATS, 987 TC_ETS_GRAFT, 988 }; 989 990 struct tc_ets_qopt_offload_replace_params { 991 unsigned int bands; 992 u8 priomap[TC_PRIO_MAX + 1]; 993 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ 994 unsigned int weights[TCQ_ETS_MAX_BANDS]; 995 struct gnet_stats_queue *qstats; 996 }; 997 998 struct tc_ets_qopt_offload_graft_params { 999 u8 band; 1000 u32 child_handle; 1001 }; 1002 1003 struct tc_ets_qopt_offload { 1004 enum tc_ets_command command; 1005 u32 handle; 1006 u32 parent; 1007 union { 1008 struct tc_ets_qopt_offload_replace_params replace_params; 1009 struct tc_qopt_offload_stats stats; 1010 struct tc_ets_qopt_offload_graft_params graft_params; 1011 }; 1012 }; 1013 1014 enum tc_tbf_command { 1015 TC_TBF_REPLACE, 1016 TC_TBF_DESTROY, 1017 TC_TBF_STATS, 1018 TC_TBF_GRAFT, 1019 }; 1020 1021 struct tc_tbf_qopt_offload_replace_params { 1022 struct psched_ratecfg rate; 1023 u32 max_size; 1024 struct gnet_stats_queue *qstats; 1025 }; 1026 1027 struct tc_tbf_qopt_offload { 1028 enum tc_tbf_command command; 1029 u32 handle; 1030 u32 parent; 1031 union { 1032 struct tc_tbf_qopt_offload_replace_params replace_params; 1033 struct tc_qopt_offload_stats stats; 1034 u32 child_handle; 1035 }; 1036 }; 1037 1038 enum tc_fifo_command { 1039 TC_FIFO_REPLACE, 1040 TC_FIFO_DESTROY, 1041 TC_FIFO_STATS, 1042 }; 1043 1044 struct tc_fifo_qopt_offload { 1045 enum tc_fifo_command command; 1046 u32 handle; 1047 u32 parent; 1048 union { 1049 struct tc_qopt_offload_stats stats; 1050 }; 1051 }; 1052 1053 #ifdef CONFIG_NET_CLS_ACT 1054 DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc); 1055 void tc_skb_ext_tc_enable(void); 1056 void tc_skb_ext_tc_disable(void); 1057 #define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc) 1058 #else /* CONFIG_NET_CLS_ACT */ 1059 static inline void tc_skb_ext_tc_enable(void) { } 1060 static inline void tc_skb_ext_tc_disable(void) { } 1061 #define tc_skb_ext_tc_enabled() false 1062 #endif 1063 1064 #endif 1065