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Linux/include/net/pkt_cls.h

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

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