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 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 static inline bool tc_cls_stats_dump(struct tcf_proto *tp, 85 struct tcf_walker *arg, 86 void *filter) 87 { 88 if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) { 89 arg->stop = 1; 90 return false; 91 } 92 93 arg->count++; 94 return true; 95 } 96 97 #else 98 static inline bool tcf_block_shared(struct tcf_block *block) 99 { 100 return false; 101 } 102 103 static inline bool tcf_block_non_null_shared(struct tcf_block *block) 104 { 105 return false; 106 } 107 108 static inline 109 int tcf_block_get(struct tcf_block **p_block, 110 struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, 111 struct netlink_ext_ack *extack) 112 { 113 return 0; 114 } 115 116 static inline 117 int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, 118 struct tcf_block_ext_info *ei, 119 struct netlink_ext_ack *extack) 120 { 121 return 0; 122 } 123 124 static inline void tcf_block_put(struct tcf_block *block) 125 { 126 } 127 128 static inline 129 void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, 130 struct tcf_block_ext_info *ei) 131 { 132 } 133 134 static inline struct Qdisc *tcf_block_q(struct tcf_block *block) 135 { 136 return NULL; 137 } 138 139 static inline 140 int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb, 141 void *cb_priv) 142 { 143 return 0; 144 } 145 146 static inline 147 void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb, 148 void *cb_priv) 149 { 150 } 151 152 static inline int tcf_classify(struct sk_buff *skb, 153 const struct tcf_block *block, 154 const struct tcf_proto *tp, 155 struct tcf_result *res, bool compat_mode) 156 { 157 return TC_ACT_UNSPEC; 158 } 159 160 #endif 161 162 static inline unsigned long 163 __cls_set_class(unsigned long *clp, unsigned long cl) 164 { 165 return xchg(clp, cl); 166 } 167 168 static inline void 169 __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) 170 { 171 unsigned long cl; 172 173 cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); 174 cl = __cls_set_class(&r->class, cl); 175 if (cl) 176 q->ops->cl_ops->unbind_tcf(q, cl); 177 } 178 179 static inline void 180 tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) 181 { 182 struct Qdisc *q = tp->chain->block->q; 183 184 /* Check q as it is not set for shared blocks. In that case, 185 * setting class is not supported. 186 */ 187 if (!q) 188 return; 189 sch_tree_lock(q); 190 __tcf_bind_filter(q, r, base); 191 sch_tree_unlock(q); 192 } 193 194 static inline void 195 __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) 196 { 197 unsigned long cl; 198 199 if ((cl = __cls_set_class(&r->class, 0)) != 0) 200 q->ops->cl_ops->unbind_tcf(q, cl); 201 } 202 203 static inline void 204 tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) 205 { 206 struct Qdisc *q = tp->chain->block->q; 207 208 if (!q) 209 return; 210 __tcf_unbind_filter(q, r); 211 } 212 213 static inline void tc_cls_bind_class(u32 classid, unsigned long cl, 214 void *q, struct tcf_result *res, 215 unsigned long base) 216 { 217 if (res->classid == classid) { 218 if (cl) 219 __tcf_bind_filter(q, res, base); 220 else 221 __tcf_unbind_filter(q, res); 222 } 223 } 224 225 struct tcf_exts { 226 #ifdef CONFIG_NET_CLS_ACT 227 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 228 int nr_actions; 229 struct tc_action **actions; 230 struct net *net; 231 netns_tracker ns_tracker; 232 #endif 233 /* Map to export classifier specific extension TLV types to the 234 * generic extensions API. Unsupported extensions must be set to 0. 235 */ 236 int action; 237 int police; 238 }; 239 240 static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, 241 int action, int police) 242 { 243 #ifdef CONFIG_NET_CLS_ACT 244 exts->type = 0; 245 exts->nr_actions = 0; 246 /* Note: we do not own yet a reference on net. 247 * This reference might be taken later from tcf_exts_get_net(). 248 */ 249 exts->net = net; 250 exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *), 251 GFP_KERNEL); 252 if (!exts->actions) 253 return -ENOMEM; 254 #endif 255 exts->action = action; 256 exts->police = police; 257 return 0; 258 } 259 260 /* Return false if the netns is being destroyed in cleanup_net(). Callers 261 * need to do cleanup synchronously in this case, otherwise may race with 262 * tc_action_net_exit(). Return true for other cases. 263 */ 264 static inline bool tcf_exts_get_net(struct tcf_exts *exts) 265 { 266 #ifdef CONFIG_NET_CLS_ACT 267 exts->net = maybe_get_net(exts->net); 268 if (exts->net) 269 netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL); 270 return exts->net != NULL; 271 #else 272 return true; 273 #endif 274 } 275 276 static inline void tcf_exts_put_net(struct tcf_exts *exts) 277 { 278 #ifdef CONFIG_NET_CLS_ACT 279 if (exts->net) 280 put_net_track(exts->net, &exts->ns_tracker); 281 #endif 282 } 283 284 #ifdef CONFIG_NET_CLS_ACT 285 #define tcf_exts_for_each_action(i, a, exts) \ 286 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) 287 #else 288 #define tcf_exts_for_each_action(i, a, exts) \ 289 for (; 0; (void)(i), (void)(a), (void)(exts)) 290 #endif 291 292 #define tcf_act_for_each_action(i, a, actions) \ 293 for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++) 294 295 static inline void 296 tcf_exts_hw_stats_update(const struct tcf_exts *exts, 297 u64 bytes, u64 packets, u64 drops, u64 lastuse, 298 u8 used_hw_stats, bool used_hw_stats_valid) 299 { 300 #ifdef CONFIG_NET_CLS_ACT 301 int i; 302 303 for (i = 0; i < exts->nr_actions; i++) { 304 struct tc_action *a = exts->actions[i]; 305 306 /* if stats from hw, just skip */ 307 if (tcf_action_update_hw_stats(a)) { 308 preempt_disable(); 309 tcf_action_stats_update(a, bytes, packets, drops, 310 lastuse, true); 311 preempt_enable(); 312 313 a->used_hw_stats = used_hw_stats; 314 a->used_hw_stats_valid = used_hw_stats_valid; 315 } 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 int tcf_exts_validate(struct net *net, struct tcf_proto *tp, 357 struct nlattr **tb, struct nlattr *rate_tlv, 358 struct tcf_exts *exts, u32 flags, 359 struct netlink_ext_ack *extack); 360 int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb, 361 struct nlattr *rate_tlv, struct tcf_exts *exts, 362 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); 363 void tcf_exts_destroy(struct tcf_exts *exts); 364 void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); 365 int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); 366 int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts); 367 int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); 368 369 /** 370 * struct tcf_pkt_info - packet information 371 * 372 * @ptr: start of the pkt data 373 * @nexthdr: offset of the next header 374 */ 375 struct tcf_pkt_info { 376 unsigned char * ptr; 377 int nexthdr; 378 }; 379 380 #ifdef CONFIG_NET_EMATCH 381 382 struct tcf_ematch_ops; 383 384 /** 385 * struct tcf_ematch - extended match (ematch) 386 * 387 * @matchid: identifier to allow userspace to reidentify a match 388 * @flags: flags specifying attributes and the relation to other matches 389 * @ops: the operations lookup table of the corresponding ematch module 390 * @datalen: length of the ematch specific configuration data 391 * @data: ematch specific data 392 * @net: the network namespace 393 */ 394 struct tcf_ematch { 395 struct tcf_ematch_ops * ops; 396 unsigned long data; 397 unsigned int datalen; 398 u16 matchid; 399 u16 flags; 400 struct net *net; 401 }; 402 403 static inline int tcf_em_is_container(struct tcf_ematch *em) 404 { 405 return !em->ops; 406 } 407 408 static inline int tcf_em_is_simple(struct tcf_ematch *em) 409 { 410 return em->flags & TCF_EM_SIMPLE; 411 } 412 413 static inline int tcf_em_is_inverted(struct tcf_ematch *em) 414 { 415 return em->flags & TCF_EM_INVERT; 416 } 417 418 static inline int tcf_em_last_match(struct tcf_ematch *em) 419 { 420 return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; 421 } 422 423 static inline int tcf_em_early_end(struct tcf_ematch *em, int result) 424 { 425 if (tcf_em_last_match(em)) 426 return 1; 427 428 if (result == 0 && em->flags & TCF_EM_REL_AND) 429 return 1; 430 431 if (result != 0 && em->flags & TCF_EM_REL_OR) 432 return 1; 433 434 return 0; 435 } 436 437 /** 438 * struct tcf_ematch_tree - ematch tree handle 439 * 440 * @hdr: ematch tree header supplied by userspace 441 * @matches: array of ematches 442 */ 443 struct tcf_ematch_tree { 444 struct tcf_ematch_tree_hdr hdr; 445 struct tcf_ematch * matches; 446 447 }; 448 449 /** 450 * struct tcf_ematch_ops - ematch module operations 451 * 452 * @kind: identifier (kind) of this ematch module 453 * @datalen: length of expected configuration data (optional) 454 * @change: called during validation (optional) 455 * @match: called during ematch tree evaluation, must return 1/0 456 * @destroy: called during destroyage (optional) 457 * @dump: called during dumping process (optional) 458 * @owner: owner, must be set to THIS_MODULE 459 * @link: link to previous/next ematch module (internal use) 460 */ 461 struct tcf_ematch_ops { 462 int kind; 463 int datalen; 464 int (*change)(struct net *net, void *, 465 int, struct tcf_ematch *); 466 int (*match)(struct sk_buff *, struct tcf_ematch *, 467 struct tcf_pkt_info *); 468 void (*destroy)(struct tcf_ematch *); 469 int (*dump)(struct sk_buff *, struct tcf_ematch *); 470 struct module *owner; 471 struct list_head link; 472 }; 473 474 int tcf_em_register(struct tcf_ematch_ops *); 475 void tcf_em_unregister(struct tcf_ematch_ops *); 476 int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, 477 struct tcf_ematch_tree *); 478 void tcf_em_tree_destroy(struct tcf_ematch_tree *); 479 int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); 480 int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, 481 struct tcf_pkt_info *); 482 483 /** 484 * tcf_em_tree_match - evaulate an ematch tree 485 * 486 * @skb: socket buffer of the packet in question 487 * @tree: ematch tree to be used for evaluation 488 * @info: packet information examined by classifier 489 * 490 * This function matches @skb against the ematch tree in @tree by going 491 * through all ematches respecting their logic relations returning 492 * as soon as the result is obvious. 493 * 494 * Returns 1 if the ematch tree as-one matches, no ematches are configured 495 * or ematch is not enabled in the kernel, otherwise 0 is returned. 496 */ 497 static inline int tcf_em_tree_match(struct sk_buff *skb, 498 struct tcf_ematch_tree *tree, 499 struct tcf_pkt_info *info) 500 { 501 if (tree->hdr.nmatches) 502 return __tcf_em_tree_match(skb, tree, info); 503 else 504 return 1; 505 } 506 507 #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) 508 509 #else /* CONFIG_NET_EMATCH */ 510 511 struct tcf_ematch_tree { 512 }; 513 514 #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) 515 #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) 516 #define tcf_em_tree_dump(skb, t, tlv) (0) 517 #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) 518 519 #endif /* CONFIG_NET_EMATCH */ 520 521 static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) 522 { 523 switch (layer) { 524 case TCF_LAYER_LINK: 525 return skb_mac_header(skb); 526 case TCF_LAYER_NETWORK: 527 return skb_network_header(skb); 528 case TCF_LAYER_TRANSPORT: 529 return skb_transport_header(skb); 530 } 531 532 return NULL; 533 } 534 535 static inline int tcf_valid_offset(const struct sk_buff *skb, 536 const unsigned char *ptr, const int len) 537 { 538 return likely((ptr + len) <= skb_tail_pointer(skb) && 539 ptr >= skb->head && 540 (ptr <= (ptr + len))); 541 } 542 543 static inline int 544 tcf_change_indev(struct net *net, struct nlattr *indev_tlv, 545 struct netlink_ext_ack *extack) 546 { 547 char indev[IFNAMSIZ]; 548 struct net_device *dev; 549 550 if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) { 551 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 552 "Interface name too long"); 553 return -EINVAL; 554 } 555 dev = __dev_get_by_name(net, indev); 556 if (!dev) { 557 NL_SET_ERR_MSG_ATTR(extack, indev_tlv, 558 "Network device not found"); 559 return -ENODEV; 560 } 561 return dev->ifindex; 562 } 563 564 static inline bool 565 tcf_match_indev(struct sk_buff *skb, int ifindex) 566 { 567 if (!ifindex) 568 return true; 569 if (!skb->skb_iif) 570 return false; 571 return ifindex == skb->skb_iif; 572 } 573 574 int tc_setup_offload_action(struct flow_action *flow_action, 575 const struct tcf_exts *exts, 576 struct netlink_ext_ack *extack); 577 void tc_cleanup_offload_action(struct flow_action *flow_action); 578 int tc_setup_action(struct flow_action *flow_action, 579 struct tc_action *actions[], 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 unsigned long cookie; 774 }; 775 776 enum tc_clsbpf_command { 777 TC_CLSBPF_OFFLOAD, 778 TC_CLSBPF_STATS, 779 }; 780 781 struct tc_cls_bpf_offload { 782 struct flow_cls_common_offload common; 783 enum tc_clsbpf_command command; 784 struct tcf_exts *exts; 785 struct bpf_prog *prog; 786 struct bpf_prog *oldprog; 787 const char *name; 788 bool exts_integrated; 789 }; 790 791 struct tc_mqprio_qopt_offload { 792 /* struct tc_mqprio_qopt must always be the first element */ 793 struct tc_mqprio_qopt qopt; 794 u16 mode; 795 u16 shaper; 796 u32 flags; 797 u64 min_rate[TC_QOPT_MAX_QUEUE]; 798 u64 max_rate[TC_QOPT_MAX_QUEUE]; 799 }; 800 801 /* This structure holds cookie structure that is passed from user 802 * to the kernel for actions and classifiers 803 */ 804 struct tc_cookie { 805 u8 *data; 806 u32 len; 807 struct rcu_head rcu; 808 }; 809 810 struct tc_qopt_offload_stats { 811 struct gnet_stats_basic_sync *bstats; 812 struct gnet_stats_queue *qstats; 813 }; 814 815 enum tc_mq_command { 816 TC_MQ_CREATE, 817 TC_MQ_DESTROY, 818 TC_MQ_STATS, 819 TC_MQ_GRAFT, 820 }; 821 822 struct tc_mq_opt_offload_graft_params { 823 unsigned long queue; 824 u32 child_handle; 825 }; 826 827 struct tc_mq_qopt_offload { 828 enum tc_mq_command command; 829 u32 handle; 830 union { 831 struct tc_qopt_offload_stats stats; 832 struct tc_mq_opt_offload_graft_params graft_params; 833 }; 834 }; 835 836 enum tc_htb_command { 837 /* Root */ 838 TC_HTB_CREATE, /* Initialize HTB offload. */ 839 TC_HTB_DESTROY, /* Destroy HTB offload. */ 840 841 /* Classes */ 842 /* Allocate qid and create leaf. */ 843 TC_HTB_LEAF_ALLOC_QUEUE, 844 /* Convert leaf to inner, preserve and return qid, create new leaf. */ 845 TC_HTB_LEAF_TO_INNER, 846 /* Delete leaf, while siblings remain. */ 847 TC_HTB_LEAF_DEL, 848 /* Delete leaf, convert parent to leaf, preserving qid. */ 849 TC_HTB_LEAF_DEL_LAST, 850 /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */ 851 TC_HTB_LEAF_DEL_LAST_FORCE, 852 /* Modify parameters of a node. */ 853 TC_HTB_NODE_MODIFY, 854 855 /* Class qdisc */ 856 TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */ 857 }; 858 859 struct tc_htb_qopt_offload { 860 struct netlink_ext_ack *extack; 861 enum tc_htb_command command; 862 u32 parent_classid; 863 u16 classid; 864 u16 qid; 865 u64 rate; 866 u64 ceil; 867 }; 868 869 #define TC_HTB_CLASSID_ROOT U32_MAX 870 871 enum tc_red_command { 872 TC_RED_REPLACE, 873 TC_RED_DESTROY, 874 TC_RED_STATS, 875 TC_RED_XSTATS, 876 TC_RED_GRAFT, 877 }; 878 879 struct tc_red_qopt_offload_params { 880 u32 min; 881 u32 max; 882 u32 probability; 883 u32 limit; 884 bool is_ecn; 885 bool is_harddrop; 886 bool is_nodrop; 887 struct gnet_stats_queue *qstats; 888 }; 889 890 struct tc_red_qopt_offload { 891 enum tc_red_command command; 892 u32 handle; 893 u32 parent; 894 union { 895 struct tc_red_qopt_offload_params set; 896 struct tc_qopt_offload_stats stats; 897 struct red_stats *xstats; 898 u32 child_handle; 899 }; 900 }; 901 902 enum tc_gred_command { 903 TC_GRED_REPLACE, 904 TC_GRED_DESTROY, 905 TC_GRED_STATS, 906 }; 907 908 struct tc_gred_vq_qopt_offload_params { 909 bool present; 910 u32 limit; 911 u32 prio; 912 u32 min; 913 u32 max; 914 bool is_ecn; 915 bool is_harddrop; 916 u32 probability; 917 /* Only need backlog, see struct tc_prio_qopt_offload_params */ 918 u32 *backlog; 919 }; 920 921 struct tc_gred_qopt_offload_params { 922 bool grio_on; 923 bool wred_on; 924 unsigned int dp_cnt; 925 unsigned int dp_def; 926 struct gnet_stats_queue *qstats; 927 struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; 928 }; 929 930 struct tc_gred_qopt_offload_stats { 931 struct gnet_stats_basic_sync bstats[MAX_DPs]; 932 struct gnet_stats_queue qstats[MAX_DPs]; 933 struct red_stats *xstats[MAX_DPs]; 934 }; 935 936 struct tc_gred_qopt_offload { 937 enum tc_gred_command command; 938 u32 handle; 939 u32 parent; 940 union { 941 struct tc_gred_qopt_offload_params set; 942 struct tc_gred_qopt_offload_stats stats; 943 }; 944 }; 945 946 enum tc_prio_command { 947 TC_PRIO_REPLACE, 948 TC_PRIO_DESTROY, 949 TC_PRIO_STATS, 950 TC_PRIO_GRAFT, 951 }; 952 953 struct tc_prio_qopt_offload_params { 954 int bands; 955 u8 priomap[TC_PRIO_MAX + 1]; 956 /* At the point of un-offloading the Qdisc, the reported backlog and 957 * qlen need to be reduced by the portion that is in HW. 958 */ 959 struct gnet_stats_queue *qstats; 960 }; 961 962 struct tc_prio_qopt_offload_graft_params { 963 u8 band; 964 u32 child_handle; 965 }; 966 967 struct tc_prio_qopt_offload { 968 enum tc_prio_command command; 969 u32 handle; 970 u32 parent; 971 union { 972 struct tc_prio_qopt_offload_params replace_params; 973 struct tc_qopt_offload_stats stats; 974 struct tc_prio_qopt_offload_graft_params graft_params; 975 }; 976 }; 977 978 enum tc_root_command { 979 TC_ROOT_GRAFT, 980 }; 981 982 struct tc_root_qopt_offload { 983 enum tc_root_command command; 984 u32 handle; 985 bool ingress; 986 }; 987 988 enum tc_ets_command { 989 TC_ETS_REPLACE, 990 TC_ETS_DESTROY, 991 TC_ETS_STATS, 992 TC_ETS_GRAFT, 993 }; 994 995 struct tc_ets_qopt_offload_replace_params { 996 unsigned int bands; 997 u8 priomap[TC_PRIO_MAX + 1]; 998 unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */ 999 unsigned int weights[TCQ_ETS_MAX_BANDS]; 1000 struct gnet_stats_queue *qstats; 1001 }; 1002 1003 struct tc_ets_qopt_offload_graft_params { 1004 u8 band; 1005 u32 child_handle; 1006 }; 1007 1008 struct tc_ets_qopt_offload { 1009 enum tc_ets_command command; 1010 u32 handle; 1011 u32 parent; 1012 union { 1013 struct tc_ets_qopt_offload_replace_params replace_params; 1014 struct tc_qopt_offload_stats stats; 1015 struct tc_ets_qopt_offload_graft_params graft_params; 1016 }; 1017 }; 1018 1019 enum tc_tbf_command { 1020 TC_TBF_REPLACE, 1021 TC_TBF_DESTROY, 1022 TC_TBF_STATS, 1023 TC_TBF_GRAFT, 1024 }; 1025 1026 struct tc_tbf_qopt_offload_replace_params { 1027 struct psched_ratecfg rate; 1028 u32 max_size; 1029 struct gnet_stats_queue *qstats; 1030 }; 1031 1032 struct tc_tbf_qopt_offload { 1033 enum tc_tbf_command command; 1034 u32 handle; 1035 u32 parent; 1036 union { 1037 struct tc_tbf_qopt_offload_replace_params replace_params; 1038 struct tc_qopt_offload_stats stats; 1039 u32 child_handle; 1040 }; 1041 }; 1042 1043 enum tc_fifo_command { 1044 TC_FIFO_REPLACE, 1045 TC_FIFO_DESTROY, 1046 TC_FIFO_STATS, 1047 }; 1048 1049 struct tc_fifo_qopt_offload { 1050 enum tc_fifo_command command; 1051 u32 handle; 1052 u32 parent; 1053 union { 1054 struct tc_qopt_offload_stats stats; 1055 }; 1056 }; 1057 1058 #ifdef CONFIG_NET_CLS_ACT 1059 DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc); 1060 void tc_skb_ext_tc_enable(void); 1061 void tc_skb_ext_tc_disable(void); 1062 #define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc) 1063 #else /* CONFIG_NET_CLS_ACT */ 1064 static inline void tc_skb_ext_tc_enable(void) { } 1065 static inline void tc_skb_ext_tc_disable(void) { } 1066 #define tc_skb_ext_tc_enabled() false 1067 #endif 1068 1069 #endif 1070