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 int 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 63 static inline bool tcf_block_shared(struct tcf_block *block) 64 { 65 return block->index; 66 } 67 68 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 69 { 70 return block && block->index; 71 } 72 73 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 74 { 75 WARN_ON(tcf_block_shared(block)); 76 return block->q; 77 } 78 79 int tcf_classify(struct sk_buff *skb, 80 const struct tcf_block *block, 81 const struct tcf_proto *tp, struct tcf_result *res, 82 bool compat_mode); 83 84 #else 85 static inline bool tcf_block_shared(struct tcf_block *block) 86 { 87 return false; 88 } 89 90 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 91 { 92 return false; 93 } 94 95 static inline 96 int tcf_block_get(struct tcf_block **p_block, 97 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, 98 struct netlink_ext_ack *extack) 99 { 100 return 0; 101 } 102 103 static inline 104 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, 105 struct tcf_block_ext_info *ei, 106 struct netlink_ext_ack *extack) 107 { 108 return 0; 109 } 110 111 static inline void tcf_block_put(struct tcf_block *block) 112 { 113 } 114 115 static inline 116 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, 117 struct tcf_block_ext_info *ei) 118 { 119 } 120 121 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 122 { 123 return NULL; 124 } 125 126 static inline 127 int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb, 128 void *cb_priv) 129 { 130 return 0; 131 } 132 133 static inline 134 void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb, 135 void *cb_priv) 136 { 137 } 138 139 static inline int tcf_classify(struct sk_buff *skb, 140 const struct tcf_block *block, 141 const struct tcf_proto *tp, 142 struct tcf_result *res, bool compat_mode) 143 { 144 return TC_ACT_UNSPEC; 145 } 146 147 #endif 148 149 static inline unsigned long 150 __cls_set_class(unsigned long *clp, unsigned long cl) 151 { 152 return xchg(clp, cl); 153 } 154 155 static inline void 156 __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) 157 { 158 unsigned long cl; 159 160 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); 161 cl = __cls_set_class(&r->class, cl); 162 if (cl) 163 q->ops->cl_ops->unbind_tcf(q, cl); 164 } 165 166 static inline void 167 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) 168 { 169 struct Qdisc *q = tp->chain->block->q; 170 171 /* Check q as it is not set for shared blocks. In that case, 172 * setting class is not supported. 173 */ 174 if (!q) 175 return; 176 sch_tree_lock(q); 177 __tcf_bind_filter(q, r, base); 178 sch_tree_unlock(q); 179 } 180 181 static inline void 182 __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) 183 { 184 unsigned long cl; 185 186 if ((cl = __cls_set_class(&r->class, 0)) != 0) 187 q->ops->cl_ops->unbind_tcf(q, cl); 188 } 189 190 static inline void 191 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) 192 { 193 struct Qdisc *q = tp->chain->block->q; 194 195 if (!q) 196 return; 197 __tcf_unbind_filter(q, r); 198 } 199 200 struct tcf_exts { 201 #ifdef CONFIG_NET_CLS_ACT 202 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 203 int nr_actions; 204 struct tc_action **actions; 205 struct net *net; 206 netns_tracker ns_tracker; 207 #endif 208 /* Map to export classifier specific extension TLV types to the 209 * generic extensions API. Unsupported extensions must be set to 0. 210 */ 211 int action; 212 int police; 213 }; 214 215 static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, 216 int action, int police) 217 { 218 #ifdef CONFIG_NET_CLS_ACT 219 exts->type = 0; 220 exts->nr_actions = 0; 221 exts->net = net; 222 netns_tracker_alloc(net, &exts->ns_tracker, GFP_KERNEL); 223 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *), 224 GFP_KERNEL); 225 if (!exts->actions) 226 return -ENOMEM; 227 #endif 228 exts->action = action; 229 exts->police = police; 230 return 0; 231 } 232 233 /* Return false if the netns is being destroyed in cleanup_net(). Callers 234 * need to do cleanup synchronously in this case, otherwise may race with 235 * tc_action_net_exit(). Return true for other cases. 236 */ 237 static inline bool tcf_exts_get_net(struct tcf_exts *exts) 238 { 239 #ifdef CONFIG_NET_CLS_ACT 240 exts->net = maybe_get_net(exts->net); 241 if (exts->net) 242 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL); 243 return exts->net != NULL; 244 #else 245 return true; 246 #endif 247 } 248 249 static inline void tcf_exts_put_net(struct tcf_exts *exts) 250 { 251 #ifdef CONFIG_NET_CLS_ACT 252 if (exts->net) 253 put_net_track(exts->net, &exts->ns_tracker); 254 #endif 255 } 256 257 #ifdef CONFIG_NET_CLS_ACT 258 #define tcf_exts_for_each_action(i, a, exts) \ 259 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) 260 #else 261 #define tcf_exts_for_each_action(i, a, exts) \ 262 for (; 0; (void)(i), (void)(a), (void)(exts)) 263 #endif 264 265 #define tcf_act_for_each_action(i, a, actions) \ 266 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) 267 268 static inline void 269 tcf_exts_stats_update(const struct tcf_exts *exts, 270 u64 bytes, u64 packets, u64 drops, u64 lastuse, 271 u8 used_hw_stats, bool used_hw_stats_valid) 272 { 273 #ifdef CONFIG_NET_CLS_ACT 274 int i; 275 276 preempt_disable(); 277 278 for (i = 0; i < exts->nr_actions; i++) { 279 struct tc_action *a = exts->actions[i]; 280 281 tcf_action_stats_update(a, bytes, packets, drops, 282 lastuse, true); 283 a->used_hw_stats = used_hw_stats; 284 a->used_hw_stats_valid = used_hw_stats_valid; 285 } 286 287 preempt_enable(); 288 #endif 289 } 290 291 /** 292 * tcf_exts_has_actions - check if at least one action is present 293 * @exts: tc filter extensions handle 294 * 295 * Returns true if at least one action is present. 296 */ 297 static inline bool tcf_exts_has_actions(struct tcf_exts *exts) 298 { 299 #ifdef CONFIG_NET_CLS_ACT 300 return exts->nr_actions; 301 #else 302 return false; 303 #endif 304 } 305 306 /** 307 * tcf_exts_exec - execute tc filter extensions 308 * @skb: socket buffer 309 * @exts: tc filter extensions handle 310 * @res: desired result 311 * 312 * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, 313 * a negative number if the filter must be considered unmatched or 314 * a positive action code (TC_ACT_*) which must be returned to the 315 * underlying layer. 316 */ 317 static inline int 318 tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, 319 struct tcf_result *res) 320 { 321 #ifdef CONFIG_NET_CLS_ACT 322 return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); 323 #endif 324 return TC_ACT_OK; 325 } 326 327 int tcf_exts_validate(struct net *net, struct tcf_proto *tp, 328 struct nlattr **tb, struct nlattr *rate_tlv, 329 struct tcf_exts *exts, u32 flags, 330 struct netlink_ext_ack *extack); 331 void tcf_exts_destroy(struct tcf_exts *exts); 332 void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); 333 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); 334 int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); 335 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); 336 337 /** 338 * struct tcf_pkt_info - packet information 339 * 340 * @ptr: start of the pkt data 341 * @nexthdr: offset of the next header 342 */ 343 struct tcf_pkt_info { 344 unsigned char * ptr; 345 int nexthdr; 346 }; 347 348 #ifdef CONFIG_NET_EMATCH 349 350 struct tcf_ematch_ops; 351 352 /** 353 * struct tcf_ematch - extended match (ematch) 354 * 355 * @matchid: identifier to allow userspace to reidentify a match 356 * @flags: flags specifying attributes and the relation to other matches 357 * @ops: the operations lookup table of the corresponding ematch module 358 * @datalen: length of the ematch specific configuration data 359 * @data: ematch specific data 360 * @net: the network namespace 361 */ 362 struct tcf_ematch { 363 struct tcf_ematch_ops * ops; 364 unsigned long data; 365 unsigned int datalen; 366 u16 matchid; 367 u16 flags; 368 struct net *net; 369 }; 370 371 static inline int tcf_em_is_container(struct tcf_ematch *em) 372 { 373 return !em->ops; 374 } 375 376 static inline int tcf_em_is_simple(struct tcf_ematch *em) 377 { 378 return em->flags & TCF_EM_SIMPLE; 379 } 380 381 static inline int tcf_em_is_inverted(struct tcf_ematch *em) 382 { 383 return em->flags & TCF_EM_INVERT; 384 } 385 386 static inline int tcf_em_last_match(struct tcf_ematch *em) 387 { 388 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; 389 } 390 391 static inline int tcf_em_early_end(struct tcf_ematch *em, int result) 392 { 393 if (tcf_em_last_match(em)) 394 return 1; 395 396 if (result == 0 && em->flags & TCF_EM_REL_AND) 397 return 1; 398 399 if (result != 0 && em->flags & TCF_EM_REL_OR) 400 return 1; 401 402 return 0; 403 } 404 405 /** 406 * struct tcf_ematch_tree - ematch tree handle 407 * 408 * @hdr: ematch tree header supplied by userspace 409 * @matches: array of ematches 410 */ 411 struct tcf_ematch_tree { 412 struct tcf_ematch_tree_hdr hdr; 413 struct tcf_ematch * matches; 414 415 }; 416 417 /** 418 * struct tcf_ematch_ops - ematch module operations 419 * 420 * @kind: identifier (kind) of this ematch module 421 * @datalen: length of expected configuration data (optional) 422 * @change: called during validation (optional) 423 * @match: called during ematch tree evaluation, must return 1/0 424 * @destroy: called during destroyage (optional) 425 * @dump: called during dumping process (optional) 426 * @owner: owner, must be set to THIS_MODULE 427 * @link: link to previous/next ematch module (internal use) 428 */ 429 struct tcf_ematch_ops { 430 int kind; 431 int datalen; 432 int (*change)(struct net *net, void *, 433 int, struct tcf_ematch *); 434 int (*match)(struct sk_buff *, struct tcf_ematch *, 435 struct tcf_pkt_info *); 436 void (*destroy)(struct tcf_ematch *); 437 int (*dump)(struct sk_buff *, struct tcf_ematch *); 438 struct module *owner; 439 struct list_head link; 440 }; 441 442 int tcf_em_register(struct tcf_ematch_ops *); 443 void tcf_em_unregister(struct tcf_ematch_ops *); 444 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, 445 struct tcf_ematch_tree *); 446 void tcf_em_tree_destroy(struct tcf_ematch_tree *); 447 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); 448 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, 449 struct tcf_pkt_info *); 450 451 /** 452 * tcf_em_tree_match - evaulate an ematch tree 453 * 454 * @skb: socket buffer of the packet in question 455 * @tree: ematch tree to be used for evaluation 456 * @info: packet information examined by classifier 457 * 458 * This function matches @skb against the ematch tree in @tree by going 459 * through all ematches respecting their logic relations returning 460 * as soon as the result is obvious. 461 * 462 * Returns 1 if the ematch tree as-one matches, no ematches are configured 463 * or ematch is not enabled in the kernel, otherwise 0 is returned. 464 */ 465 static inline int tcf_em_tree_match(struct sk_buff *skb, 466 struct tcf_ematch_tree *tree, 467 struct tcf_pkt_info *info) 468 { 469 if (tree->hdr.nmatches) 470 return __tcf_em_tree_match(skb, tree, info); 471 else 472 return 1; 473 } 474 475 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) 476 477 #else /* CONFIG_NET_EMATCH */ 478 479 struct tcf_ematch_tree { 480 }; 481 482 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) 483 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) 484 #define tcf_em_tree_dump(skb, t, tlv) (0) 485 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) 486 487 #endif /* CONFIG_NET_EMATCH */ 488 489 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) 490 { 491 switch (layer) { 492 case TCF_LAYER_LINK: 493 return skb_mac_header(skb); 494 case TCF_LAYER_NETWORK: 495 return skb_network_header(skb); 496 case TCF_LAYER_TRANSPORT: 497 return skb_transport_header(skb); 498 } 499 500 return NULL; 501 } 502 503 static inline int tcf_valid_offset(const struct sk_buff *skb, 504 const unsigned char *ptr, const int len) 505 { 506 return likely((ptr + len) <= skb_tail_pointer(skb) && 507 ptr >= skb->head && 508 (ptr <= (ptr + len))); 509 } 510 511 static inline int 512 tcf_change_indev(struct net *net, struct nlattr *indev_tlv, 513 struct netlink_ext_ack *extack) 514 { 515 char indev[IFNAMSIZ]; 516 struct net_device *dev; 517 518 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) { 519 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 520 "Interface name too long"); 521 return -EINVAL; 522 } 523 dev = __dev_get_by_name(net, indev); 524 if (!dev) { 525 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 526 "Network device not found"); 527 return -ENODEV; 528 } 529 return dev->ifindex; 530 } 531 532 static inline bool 533 tcf_match_indev(struct sk_buff *skb, int ifindex) 534 { 535 if (!ifindex) 536 return true; 537 if (!skb->skb_iif) 538 return false; 539 return ifindex == skb->skb_iif; 540 } 541 542 int tc_setup_offload_action(struct flow_action *flow_action, 543 const struct tcf_exts *exts); 544 void tc_cleanup_offload_action(struct flow_action *flow_action); 545 int tc_setup_action(struct flow_action *flow_action, 546 struct tc_action *actions[]); 547 548 int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, 549 void *type_data, bool err_stop, bool rtnl_held); 550 int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, 551 enum tc_setup_type type, void *type_data, bool err_stop, 552 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 553 int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, 554 enum tc_setup_type type, void *type_data, bool err_stop, 555 u32 *old_flags, unsigned int *old_in_hw_count, 556 u32 *new_flags, unsigned int *new_in_hw_count, 557 bool rtnl_held); 558 int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, 559 enum tc_setup_type type, void *type_data, bool err_stop, 560 u32 *flags, unsigned int *in_hw_count, bool rtnl_held); 561 int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, 562 bool add, flow_setup_cb_t *cb, 563 enum tc_setup_type type, void *type_data, 564 void *cb_priv, u32 *flags, unsigned int *in_hw_count); 565 unsigned int tcf_exts_num_actions(struct tcf_exts *exts); 566 567 #ifdef CONFIG_NET_CLS_ACT 568 int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 569 enum flow_block_binder_type binder_type, 570 struct nlattr *block_index_attr, 571 struct netlink_ext_ack *extack); 572 void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch); 573 int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 574 struct netlink_ext_ack *extack); 575 struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 576 struct sk_buff **to_free, int *ret); 577 int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe); 578 #else 579 static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch, 580 enum flow_block_binder_type binder_type, 581 struct nlattr *block_index_attr, 582 struct netlink_ext_ack *extack) 583 { 584 return 0; 585 } 586 587 static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch) 588 { 589 } 590 591 static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr, 592 struct netlink_ext_ack *extack) 593 { 594 return 0; 595 } 596 597 static inline struct sk_buff * 598 tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb, 599 struct sk_buff **to_free, int *ret) 600 { 601 return skb; 602 } 603 604 static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe) 605 { 606 return 0; 607 } 608 #endif 609 610 struct tc_cls_u32_knode { 611 struct tcf_exts *exts; 612 struct tcf_result *res; 613 struct tc_u32_sel *sel; 614 u32 handle; 615 u32 val; 616 u32 mask; 617 u32 link_handle; 618 u8 fshift; 619 }; 620 621 struct tc_cls_u32_hnode { 622 u32 handle; 623 u32 prio; 624 unsigned int divisor; 625 }; 626 627 enum tc_clsu32_command { 628 TC_CLSU32_NEW_KNODE, 629 TC_CLSU32_REPLACE_KNODE, 630 TC_CLSU32_DELETE_KNODE, 631 TC_CLSU32_NEW_HNODE, 632 TC_CLSU32_REPLACE_HNODE, 633 TC_CLSU32_DELETE_HNODE, 634 }; 635 636 struct tc_cls_u32_offload { 637 struct flow_cls_common_offload common; 638 /* knode values */ 639 enum tc_clsu32_command command; 640 union { 641 struct tc_cls_u32_knode knode; 642 struct tc_cls_u32_hnode hnode; 643 }; 644 }; 645 646 static inline bool tc_can_offload(const struct net_device *dev) 647 { 648 return dev->features & NETIF_F_HW_TC; 649 } 650 651 static inline bool tc_can_offload_extack(const struct net_device *dev, 652 struct netlink_ext_ack *extack) 653 { 654 bool can = tc_can_offload(dev); 655 656 if (!can) 657 NL_SET_ERR_MSG(extack, "TC offload is disabled on net device"); 658 659 return can; 660 } 661 662 static inline bool 663 tc_cls_can_offload_and_chain0(const struct net_device *dev, 664 struct flow_cls_common_offload *common) 665 { 666 if (!tc_can_offload_extack(dev, common->extack)) 667 return false; 668 if (common->chain_index) { 669 NL_SET_ERR_MSG(common->extack, 670 "Driver supports only offload of chain 0"); 671 return false; 672 } 673 return true; 674 } 675 676 static inline bool tc_skip_hw(u32 flags) 677 { 678 return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; 679 } 680 681 static inline bool tc_skip_sw(u32 flags) 682 { 683 return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; 684 } 685 686 /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ 687 static inline bool tc_flags_valid(u32 flags) 688 { 689 if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | 690 TCA_CLS_FLAGS_VERBOSE)) 691 return false; 692 693 flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; 694 if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) 695 return false; 696 697 return true; 698 } 699 700 static inline bool tc_in_hw(u32 flags) 701 { 702 return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; 703 } 704 705 static inline void 706 tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, 707 const struct tcf_proto *tp, u32 flags, 708 struct netlink_ext_ack *extack) 709 { 710 cls_common->chain_index = tp->chain->index; 711 cls_common->protocol = tp->protocol; 712 cls_common->prio = tp->prio >> 16; 713 if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) 714 cls_common->extack = extack; 715 } 716 717 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 718 static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb) 719 { 720 struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT); 721 722 if (tc_skb_ext) 723 memset(tc_skb_ext, 0, sizeof(*tc_skb_ext)); 724 return tc_skb_ext; 725 } 726 #endif 727 728 enum tc_matchall_command { 729 TC_CLSMATCHALL_REPLACE, 730 TC_CLSMATCHALL_DESTROY, 731 TC_CLSMATCHALL_STATS, 732 }; 733 734 struct tc_cls_matchall_offload { 735 struct flow_cls_common_offload common; 736 enum tc_matchall_command command; 737 struct flow_rule *rule; 738 struct flow_stats stats; 739 unsigned long cookie; 740 }; 741 742 enum tc_clsbpf_command { 743 TC_CLSBPF_OFFLOAD, 744 TC_CLSBPF_STATS, 745 }; 746 747 struct tc_cls_bpf_offload { 748 struct flow_cls_common_offload common; 749 enum tc_clsbpf_command command; 750 struct tcf_exts *exts; 751 struct bpf_prog *prog; 752 struct bpf_prog *oldprog; 753 const char *name; 754 bool exts_integrated; 755 }; 756 757 struct tc_mqprio_qopt_offload { 758 /* struct tc_mqprio_qopt must always be the first element */ 759 struct tc_mqprio_qopt qopt; 760 u16 mode; 761 u16 shaper; 762 u32 flags; 763 u64 min_rate[TC_QOPT_MAX_QUEUE]; 764 u64 max_rate[TC_QOPT_MAX_QUEUE]; 765 }; 766 767 /* This structure holds cookie structure that is passed from user 768 * to the kernel for actions and classifiers 769 */ 770 struct tc_cookie { 771 u8 *data; 772 u32 len; 773 struct rcu_head rcu; 774 }; 775 776 struct tc_qopt_offload_stats { 777 struct gnet_stats_basic_sync *bstats; 778 struct gnet_stats_queue *qstats; 779 }; 780 781 enum tc_mq_command { 782 TC_MQ_CREATE, 783 TC_MQ_DESTROY, 784 TC_MQ_STATS, 785 TC_MQ_GRAFT, 786 }; 787 788 struct tc_mq_opt_offload_graft_params { 789 unsigned long queue; 790 u32 child_handle; 791 }; 792 793 struct tc_mq_qopt_offload { 794 enum tc_mq_command command; 795 u32 handle; 796 union { 797 struct tc_qopt_offload_stats stats; 798 struct tc_mq_opt_offload_graft_params graft_params; 799 }; 800 }; 801 802 enum tc_htb_command { 803 /* Root */ 804 TC_HTB_CREATE, /* Initialize HTB offload. */ 805 TC_HTB_DESTROY, /* Destroy HTB offload. */ 806 807 /* Classes */ 808 /* Allocate qid and create leaf. */ 809 TC_HTB_LEAF_ALLOC_QUEUE, 810 /* Convert leaf to inner, preserve and return qid, create new leaf. */ 811 TC_HTB_LEAF_TO_INNER, 812 /* Delete leaf, while siblings remain. */ 813 TC_HTB_LEAF_DEL, 814 /* Delete leaf, convert parent to leaf, preserving qid. */ 815 TC_HTB_LEAF_DEL_LAST, 816 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ 817 TC_HTB_LEAF_DEL_LAST_FORCE, 818 /* Modify parameters of a node. */ 819 TC_HTB_NODE_MODIFY, 820 821 /* Class qdisc */ 822 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ 823 }; 824 825 struct tc_htb_qopt_offload { 826 struct netlink_ext_ack *extack; 827 enum tc_htb_command command; 828 u32 parent_classid; 829 u16 classid; 830 u16 qid; 831 u64 rate; 832 u64 ceil; 833 }; 834 835 #define TC_HTB_CLASSID_ROOT U32_MAX 836 837 enum tc_red_command { 838 TC_RED_REPLACE, 839 TC_RED_DESTROY, 840 TC_RED_STATS, 841 TC_RED_XSTATS, 842 TC_RED_GRAFT, 843 }; 844 845 struct tc_red_qopt_offload_params { 846 u32 min; 847 u32 max; 848 u32 probability; 849 u32 limit; 850 bool is_ecn; 851 bool is_harddrop; 852 bool is_nodrop; 853 struct gnet_stats_queue *qstats; 854 }; 855 856 struct tc_red_qopt_offload { 857 enum tc_red_command command; 858 u32 handle; 859 u32 parent; 860 union { 861 struct tc_red_qopt_offload_params set; 862 struct tc_qopt_offload_stats stats; 863 struct red_stats *xstats; 864 u32 child_handle; 865 }; 866 }; 867 868 enum tc_gred_command { 869 TC_GRED_REPLACE, 870 TC_GRED_DESTROY, 871 TC_GRED_STATS, 872 }; 873 874 struct tc_gred_vq_qopt_offload_params { 875 bool present; 876 u32 limit; 877 u32 prio; 878 u32 min; 879 u32 max; 880 bool is_ecn; 881 bool is_harddrop; 882 u32 probability; 883 /* Only need backlog, see struct tc_prio_qopt_offload_params */ 884 u32 *backlog; 885 }; 886 887 struct tc_gred_qopt_offload_params { 888 bool grio_on; 889 bool wred_on; 890 unsigned int dp_cnt; 891 unsigned int dp_def; 892 struct gnet_stats_queue *qstats; 893 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; 894 }; 895 896 struct tc_gred_qopt_offload_stats { 897 struct gnet_stats_basic_sync bstats[MAX_DPs]; 898 struct gnet_stats_queue qstats[MAX_DPs]; 899 struct red_stats *xstats[MAX_DPs]; 900 }; 901 902 struct tc_gred_qopt_offload { 903 enum tc_gred_command command; 904 u32 handle; 905 u32 parent; 906 union { 907 struct tc_gred_qopt_offload_params set; 908 struct tc_gred_qopt_offload_stats stats; 909 }; 910 }; 911 912 enum tc_prio_command { 913 TC_PRIO_REPLACE, 914 TC_PRIO_DESTROY, 915 TC_PRIO_STATS, 916 TC_PRIO_GRAFT, 917 }; 918 919 struct tc_prio_qopt_offload_params { 920 int bands; 921 u8 priomap[TC_PRIO_MAX + 1]; 922 /* At the point of un-offloading the Qdisc, the reported backlog and 923 * qlen need to be reduced by the portion that is in HW. 924 */ 925 struct gnet_stats_queue *qstats; 926 }; 927 928 struct tc_prio_qopt_offload_graft_params { 929 u8 band; 930 u32 child_handle; 931 }; 932 933 struct tc_prio_qopt_offload { 934 enum tc_prio_command command; 935 u32 handle; 936 u32 parent; 937 union { 938 struct tc_prio_qopt_offload_params replace_params; 939 struct tc_qopt_offload_stats stats; 940 struct tc_prio_qopt_offload_graft_params graft_params; 941 }; 942 }; 943 944 enum tc_root_command { 945 TC_ROOT_GRAFT, 946 }; 947 948 struct tc_root_qopt_offload { 949 enum tc_root_command command; 950 u32 handle; 951 bool ingress; 952 }; 953 954 enum tc_ets_command { 955 TC_ETS_REPLACE, 956 TC_ETS_DESTROY, 957 TC_ETS_STATS, 958 TC_ETS_GRAFT, 959 }; 960 961 struct tc_ets_qopt_offload_replace_params { 962 unsigned int bands; 963 u8 priomap[TC_PRIO_MAX + 1]; 964 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ 965 unsigned int weights[TCQ_ETS_MAX_BANDS]; 966 struct gnet_stats_queue *qstats; 967 }; 968 969 struct tc_ets_qopt_offload_graft_params { 970 u8 band; 971 u32 child_handle; 972 }; 973 974 struct tc_ets_qopt_offload { 975 enum tc_ets_command command; 976 u32 handle; 977 u32 parent; 978 union { 979 struct tc_ets_qopt_offload_replace_params replace_params; 980 struct tc_qopt_offload_stats stats; 981 struct tc_ets_qopt_offload_graft_params graft_params; 982 }; 983 }; 984 985 enum tc_tbf_command { 986 TC_TBF_REPLACE, 987 TC_TBF_DESTROY, 988 TC_TBF_STATS, 989 TC_TBF_GRAFT, 990 }; 991 992 struct tc_tbf_qopt_offload_replace_params { 993 struct psched_ratecfg rate; 994 u32 max_size; 995 struct gnet_stats_queue *qstats; 996 }; 997 998 struct tc_tbf_qopt_offload { 999 enum tc_tbf_command command; 1000 u32 handle; 1001 u32 parent; 1002 union { 1003 struct tc_tbf_qopt_offload_replace_params replace_params; 1004 struct tc_qopt_offload_stats stats; 1005 u32 child_handle; 1006 }; 1007 }; 1008 1009 enum tc_fifo_command { 1010 TC_FIFO_REPLACE, 1011 TC_FIFO_DESTROY, 1012 TC_FIFO_STATS, 1013 }; 1014 1015 struct tc_fifo_qopt_offload { 1016 enum tc_fifo_command command; 1017 u32 handle; 1018 u32 parent; 1019 union { 1020 struct tc_qopt_offload_stats stats; 1021 }; 1022 }; 1023 1024 #endif 1025