1 #ifndef _NET_FLOW_OFFLOAD_H
2 #define _NET_FLOW_OFFLOAD_H
3 
4 #include <linux/kernel.h>
5 #include <linux/list.h>
6 #include <linux/netlink.h>
7 #include <net/flow_dissector.h>
8 
9 struct flow_match {
10 	struct flow_dissector	*dissector;
11 	void			*mask;
12 	void			*key;
13 };
14 
15 struct flow_match_meta {
16 	struct flow_dissector_key_meta *key, *mask;
17 };
18 
19 struct flow_match_basic {
20 	struct flow_dissector_key_basic *key, *mask;
21 };
22 
23 struct flow_match_control {
24 	struct flow_dissector_key_control *key, *mask;
25 };
26 
27 struct flow_match_eth_addrs {
28 	struct flow_dissector_key_eth_addrs *key, *mask;
29 };
30 
31 struct flow_match_vlan {
32 	struct flow_dissector_key_vlan *key, *mask;
33 };
34 
35 struct flow_match_ipv4_addrs {
36 	struct flow_dissector_key_ipv4_addrs *key, *mask;
37 };
38 
39 struct flow_match_ipv6_addrs {
40 	struct flow_dissector_key_ipv6_addrs *key, *mask;
41 };
42 
43 struct flow_match_ip {
44 	struct flow_dissector_key_ip *key, *mask;
45 };
46 
47 struct flow_match_ports {
48 	struct flow_dissector_key_ports *key, *mask;
49 };
50 
51 struct flow_match_ports_range {
52 	struct flow_dissector_key_ports_range *key, *mask;
53 };
54 
55 struct flow_match_icmp {
56 	struct flow_dissector_key_icmp *key, *mask;
57 };
58 
59 struct flow_match_tcp {
60 	struct flow_dissector_key_tcp *key, *mask;
61 };
62 
63 struct flow_match_mpls {
64 	struct flow_dissector_key_mpls *key, *mask;
65 };
66 
67 struct flow_match_enc_keyid {
68 	struct flow_dissector_key_keyid *key, *mask;
69 };
70 
71 struct flow_match_enc_opts {
72 	struct flow_dissector_key_enc_opts *key, *mask;
73 };
74 
75 struct flow_match_ct {
76 	struct flow_dissector_key_ct *key, *mask;
77 };
78 
79 struct flow_match_pppoe {
80 	struct flow_dissector_key_pppoe *key, *mask;
81 };
82 
83 struct flow_match_l2tpv3 {
84 	struct flow_dissector_key_l2tpv3 *key, *mask;
85 };
86 
87 struct flow_rule;
88 
89 void flow_rule_match_meta(const struct flow_rule *rule,
90 			  struct flow_match_meta *out);
91 void flow_rule_match_basic(const struct flow_rule *rule,
92 			   struct flow_match_basic *out);
93 void flow_rule_match_control(const struct flow_rule *rule,
94 			     struct flow_match_control *out);
95 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
96 			       struct flow_match_eth_addrs *out);
97 void flow_rule_match_vlan(const struct flow_rule *rule,
98 			  struct flow_match_vlan *out);
99 void flow_rule_match_cvlan(const struct flow_rule *rule,
100 			   struct flow_match_vlan *out);
101 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
102 				struct flow_match_ipv4_addrs *out);
103 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
104 				struct flow_match_ipv6_addrs *out);
105 void flow_rule_match_ip(const struct flow_rule *rule,
106 			struct flow_match_ip *out);
107 void flow_rule_match_ports(const struct flow_rule *rule,
108 			   struct flow_match_ports *out);
109 void flow_rule_match_ports_range(const struct flow_rule *rule,
110 				 struct flow_match_ports_range *out);
111 void flow_rule_match_tcp(const struct flow_rule *rule,
112 			 struct flow_match_tcp *out);
113 void flow_rule_match_icmp(const struct flow_rule *rule,
114 			  struct flow_match_icmp *out);
115 void flow_rule_match_mpls(const struct flow_rule *rule,
116 			  struct flow_match_mpls *out);
117 void flow_rule_match_enc_control(const struct flow_rule *rule,
118 				 struct flow_match_control *out);
119 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
120 				    struct flow_match_ipv4_addrs *out);
121 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
122 				    struct flow_match_ipv6_addrs *out);
123 void flow_rule_match_enc_ip(const struct flow_rule *rule,
124 			    struct flow_match_ip *out);
125 void flow_rule_match_enc_ports(const struct flow_rule *rule,
126 			       struct flow_match_ports *out);
127 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
128 			       struct flow_match_enc_keyid *out);
129 void flow_rule_match_enc_opts(const struct flow_rule *rule,
130 			      struct flow_match_enc_opts *out);
131 void flow_rule_match_ct(const struct flow_rule *rule,
132 			struct flow_match_ct *out);
133 void flow_rule_match_pppoe(const struct flow_rule *rule,
134 			   struct flow_match_pppoe *out);
135 void flow_rule_match_l2tpv3(const struct flow_rule *rule,
136 			    struct flow_match_l2tpv3 *out);
137 
138 enum flow_action_id {
139 	FLOW_ACTION_ACCEPT		= 0,
140 	FLOW_ACTION_DROP,
141 	FLOW_ACTION_TRAP,
142 	FLOW_ACTION_GOTO,
143 	FLOW_ACTION_REDIRECT,
144 	FLOW_ACTION_MIRRED,
145 	FLOW_ACTION_REDIRECT_INGRESS,
146 	FLOW_ACTION_MIRRED_INGRESS,
147 	FLOW_ACTION_VLAN_PUSH,
148 	FLOW_ACTION_VLAN_POP,
149 	FLOW_ACTION_VLAN_MANGLE,
150 	FLOW_ACTION_TUNNEL_ENCAP,
151 	FLOW_ACTION_TUNNEL_DECAP,
152 	FLOW_ACTION_MANGLE,
153 	FLOW_ACTION_ADD,
154 	FLOW_ACTION_CSUM,
155 	FLOW_ACTION_MARK,
156 	FLOW_ACTION_PTYPE,
157 	FLOW_ACTION_PRIORITY,
158 	FLOW_ACTION_WAKE,
159 	FLOW_ACTION_QUEUE,
160 	FLOW_ACTION_SAMPLE,
161 	FLOW_ACTION_POLICE,
162 	FLOW_ACTION_CT,
163 	FLOW_ACTION_CT_METADATA,
164 	FLOW_ACTION_MPLS_PUSH,
165 	FLOW_ACTION_MPLS_POP,
166 	FLOW_ACTION_MPLS_MANGLE,
167 	FLOW_ACTION_GATE,
168 	FLOW_ACTION_PPPOE_PUSH,
169 	FLOW_ACTION_JUMP,
170 	FLOW_ACTION_PIPE,
171 	FLOW_ACTION_VLAN_PUSH_ETH,
172 	FLOW_ACTION_VLAN_POP_ETH,
173 	FLOW_ACTION_CONTINUE,
174 	NUM_FLOW_ACTIONS,
175 };
176 
177 /* This is mirroring enum pedit_header_type definition for easy mapping between
178  * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
179  * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
180  */
181 enum flow_action_mangle_base {
182 	FLOW_ACT_MANGLE_UNSPEC		= 0,
183 	FLOW_ACT_MANGLE_HDR_TYPE_ETH,
184 	FLOW_ACT_MANGLE_HDR_TYPE_IP4,
185 	FLOW_ACT_MANGLE_HDR_TYPE_IP6,
186 	FLOW_ACT_MANGLE_HDR_TYPE_TCP,
187 	FLOW_ACT_MANGLE_HDR_TYPE_UDP,
188 };
189 
190 enum flow_action_hw_stats_bit {
191 	FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
192 	FLOW_ACTION_HW_STATS_DELAYED_BIT,
193 	FLOW_ACTION_HW_STATS_DISABLED_BIT,
194 
195 	FLOW_ACTION_HW_STATS_NUM_BITS
196 };
197 
198 enum flow_action_hw_stats {
199 	FLOW_ACTION_HW_STATS_IMMEDIATE =
200 		BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
201 	FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
202 	FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
203 				   FLOW_ACTION_HW_STATS_DELAYED,
204 	FLOW_ACTION_HW_STATS_DISABLED =
205 		BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
206 	FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
207 };
208 
209 typedef void (*action_destr)(void *priv);
210 
211 struct flow_action_cookie {
212 	u32 cookie_len;
213 	u8 cookie[];
214 };
215 
216 struct flow_action_cookie *flow_action_cookie_create(void *data,
217 						     unsigned int len,
218 						     gfp_t gfp);
219 void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
220 
221 struct flow_action_entry {
222 	enum flow_action_id		id;
223 	u32				hw_index;
224 	enum flow_action_hw_stats	hw_stats;
225 	action_destr			destructor;
226 	void				*destructor_priv;
227 	union {
228 		u32			chain_index;	/* FLOW_ACTION_GOTO */
229 		struct net_device	*dev;		/* FLOW_ACTION_REDIRECT */
230 		struct {				/* FLOW_ACTION_VLAN */
231 			u16		vid;
232 			__be16		proto;
233 			u8		prio;
234 		} vlan;
235 		struct {				/* FLOW_ACTION_VLAN_PUSH_ETH */
236 			unsigned char dst[ETH_ALEN];
237 			unsigned char src[ETH_ALEN];
238 		} vlan_push_eth;
239 		struct {				/* FLOW_ACTION_MANGLE */
240 							/* FLOW_ACTION_ADD */
241 			enum flow_action_mangle_base htype;
242 			u32		offset;
243 			u32		mask;
244 			u32		val;
245 		} mangle;
246 		struct ip_tunnel_info	*tunnel;	/* FLOW_ACTION_TUNNEL_ENCAP */
247 		u32			csum_flags;	/* FLOW_ACTION_CSUM */
248 		u32			mark;		/* FLOW_ACTION_MARK */
249 		u16                     ptype;          /* FLOW_ACTION_PTYPE */
250 		u32			priority;	/* FLOW_ACTION_PRIORITY */
251 		struct {				/* FLOW_ACTION_QUEUE */
252 			u32		ctx;
253 			u32		index;
254 			u8		vf;
255 		} queue;
256 		struct {				/* FLOW_ACTION_SAMPLE */
257 			struct psample_group	*psample_group;
258 			u32			rate;
259 			u32			trunc_size;
260 			bool			truncate;
261 		} sample;
262 		struct {				/* FLOW_ACTION_POLICE */
263 			u32			burst;
264 			u64			rate_bytes_ps;
265 			u64			peakrate_bytes_ps;
266 			u32			avrate;
267 			u16			overhead;
268 			u64			burst_pkt;
269 			u64			rate_pkt_ps;
270 			u32			mtu;
271 			struct {
272 				enum flow_action_id	act_id;
273 				u32			extval;
274 			} exceed, notexceed;
275 		} police;
276 		struct {				/* FLOW_ACTION_CT */
277 			int action;
278 			u16 zone;
279 			struct nf_flowtable *flow_table;
280 		} ct;
281 		struct {
282 			unsigned long cookie;
283 			u32 mark;
284 			u32 labels[4];
285 			bool orig_dir;
286 		} ct_metadata;
287 		struct {				/* FLOW_ACTION_MPLS_PUSH */
288 			u32		label;
289 			__be16		proto;
290 			u8		tc;
291 			u8		bos;
292 			u8		ttl;
293 		} mpls_push;
294 		struct {				/* FLOW_ACTION_MPLS_POP */
295 			__be16		proto;
296 		} mpls_pop;
297 		struct {				/* FLOW_ACTION_MPLS_MANGLE */
298 			u32		label;
299 			u8		tc;
300 			u8		bos;
301 			u8		ttl;
302 		} mpls_mangle;
303 		struct {
304 			s32		prio;
305 			u64		basetime;
306 			u64		cycletime;
307 			u64		cycletimeext;
308 			u32		num_entries;
309 			struct action_gate_entry *entries;
310 		} gate;
311 		struct {				/* FLOW_ACTION_PPPOE_PUSH */
312 			u16		sid;
313 		} pppoe;
314 	};
315 	struct flow_action_cookie *cookie; /* user defined action cookie */
316 };
317 
318 struct flow_action {
319 	unsigned int			num_entries;
320 	struct flow_action_entry	entries[];
321 };
322 
flow_action_has_entries(const struct flow_action * action)323 static inline bool flow_action_has_entries(const struct flow_action *action)
324 {
325 	return action->num_entries;
326 }
327 
328 /**
329  * flow_offload_has_one_action() - check if exactly one action is present
330  * @action: tc filter flow offload action
331  *
332  * Returns true if exactly one action is present.
333  */
flow_offload_has_one_action(const struct flow_action * action)334 static inline bool flow_offload_has_one_action(const struct flow_action *action)
335 {
336 	return action->num_entries == 1;
337 }
338 
flow_action_is_last_entry(const struct flow_action * action,const struct flow_action_entry * entry)339 static inline bool flow_action_is_last_entry(const struct flow_action *action,
340 					     const struct flow_action_entry *entry)
341 {
342 	return entry == &action->entries[action->num_entries - 1];
343 }
344 
345 #define flow_action_for_each(__i, __act, __actions)			\
346         for (__i = 0, __act = &(__actions)->entries[0];			\
347 	     __i < (__actions)->num_entries;				\
348 	     __act = &(__actions)->entries[++__i])
349 
350 static inline bool
flow_action_mixed_hw_stats_check(const struct flow_action * action,struct netlink_ext_ack * extack)351 flow_action_mixed_hw_stats_check(const struct flow_action *action,
352 				 struct netlink_ext_ack *extack)
353 {
354 	const struct flow_action_entry *action_entry;
355 	u8 last_hw_stats;
356 	int i;
357 
358 	if (flow_offload_has_one_action(action))
359 		return true;
360 
361 	flow_action_for_each(i, action_entry, action) {
362 		if (i && action_entry->hw_stats != last_hw_stats) {
363 			NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
364 			return false;
365 		}
366 		last_hw_stats = action_entry->hw_stats;
367 	}
368 	return true;
369 }
370 
371 static inline const struct flow_action_entry *
flow_action_first_entry_get(const struct flow_action * action)372 flow_action_first_entry_get(const struct flow_action *action)
373 {
374 	WARN_ON(!flow_action_has_entries(action));
375 	return &action->entries[0];
376 }
377 
378 static inline bool
__flow_action_hw_stats_check(const struct flow_action * action,struct netlink_ext_ack * extack,bool check_allow_bit,enum flow_action_hw_stats_bit allow_bit)379 __flow_action_hw_stats_check(const struct flow_action *action,
380 			     struct netlink_ext_ack *extack,
381 			     bool check_allow_bit,
382 			     enum flow_action_hw_stats_bit allow_bit)
383 {
384 	const struct flow_action_entry *action_entry;
385 
386 	if (!flow_action_has_entries(action))
387 		return true;
388 	if (!flow_action_mixed_hw_stats_check(action, extack))
389 		return false;
390 
391 	action_entry = flow_action_first_entry_get(action);
392 
393 	/* Zero is not a legal value for hw_stats, catch anyone passing it */
394 	WARN_ON_ONCE(!action_entry->hw_stats);
395 
396 	if (!check_allow_bit &&
397 	    ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
398 		NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
399 		return false;
400 	} else if (check_allow_bit &&
401 		   !(action_entry->hw_stats & BIT(allow_bit))) {
402 		NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
403 		return false;
404 	}
405 	return true;
406 }
407 
408 static inline bool
flow_action_hw_stats_check(const struct flow_action * action,struct netlink_ext_ack * extack,enum flow_action_hw_stats_bit allow_bit)409 flow_action_hw_stats_check(const struct flow_action *action,
410 			   struct netlink_ext_ack *extack,
411 			   enum flow_action_hw_stats_bit allow_bit)
412 {
413 	return __flow_action_hw_stats_check(action, extack, true, allow_bit);
414 }
415 
416 static inline bool
flow_action_basic_hw_stats_check(const struct flow_action * action,struct netlink_ext_ack * extack)417 flow_action_basic_hw_stats_check(const struct flow_action *action,
418 				 struct netlink_ext_ack *extack)
419 {
420 	return __flow_action_hw_stats_check(action, extack, false, 0);
421 }
422 
423 struct flow_rule {
424 	struct flow_match	match;
425 	struct flow_action	action;
426 };
427 
428 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
429 
flow_rule_match_key(const struct flow_rule * rule,enum flow_dissector_key_id key)430 static inline bool flow_rule_match_key(const struct flow_rule *rule,
431 				       enum flow_dissector_key_id key)
432 {
433 	return dissector_uses_key(rule->match.dissector, key);
434 }
435 
436 struct flow_stats {
437 	u64	pkts;
438 	u64	bytes;
439 	u64	drops;
440 	u64	lastused;
441 	enum flow_action_hw_stats used_hw_stats;
442 	bool used_hw_stats_valid;
443 };
444 
flow_stats_update(struct flow_stats * flow_stats,u64 bytes,u64 pkts,u64 drops,u64 lastused,enum flow_action_hw_stats used_hw_stats)445 static inline void flow_stats_update(struct flow_stats *flow_stats,
446 				     u64 bytes, u64 pkts,
447 				     u64 drops, u64 lastused,
448 				     enum flow_action_hw_stats used_hw_stats)
449 {
450 	flow_stats->pkts	+= pkts;
451 	flow_stats->bytes	+= bytes;
452 	flow_stats->drops	+= drops;
453 	flow_stats->lastused	= max_t(u64, flow_stats->lastused, lastused);
454 
455 	/* The driver should pass value with a maximum of one bit set.
456 	 * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
457 	 */
458 	WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
459 	flow_stats->used_hw_stats |= used_hw_stats;
460 	flow_stats->used_hw_stats_valid = true;
461 }
462 
463 enum flow_block_command {
464 	FLOW_BLOCK_BIND,
465 	FLOW_BLOCK_UNBIND,
466 };
467 
468 enum flow_block_binder_type {
469 	FLOW_BLOCK_BINDER_TYPE_UNSPEC,
470 	FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
471 	FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
472 	FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
473 	FLOW_BLOCK_BINDER_TYPE_RED_MARK,
474 };
475 
476 struct flow_block {
477 	struct list_head cb_list;
478 };
479 
480 struct netlink_ext_ack;
481 
482 struct flow_block_offload {
483 	enum flow_block_command command;
484 	enum flow_block_binder_type binder_type;
485 	bool block_shared;
486 	bool unlocked_driver_cb;
487 	struct net *net;
488 	struct flow_block *block;
489 	struct list_head cb_list;
490 	struct list_head *driver_block_list;
491 	struct netlink_ext_ack *extack;
492 	struct Qdisc *sch;
493 	struct list_head *cb_list_head;
494 };
495 
496 enum tc_setup_type;
497 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
498 			    void *cb_priv);
499 
500 struct flow_block_cb;
501 
502 struct flow_block_indr {
503 	struct list_head		list;
504 	struct net_device		*dev;
505 	struct Qdisc			*sch;
506 	enum flow_block_binder_type	binder_type;
507 	void				*data;
508 	void				*cb_priv;
509 	void				(*cleanup)(struct flow_block_cb *block_cb);
510 };
511 
512 struct flow_block_cb {
513 	struct list_head	driver_list;
514 	struct list_head	list;
515 	flow_setup_cb_t		*cb;
516 	void			*cb_ident;
517 	void			*cb_priv;
518 	void			(*release)(void *cb_priv);
519 	struct flow_block_indr	indr;
520 	unsigned int		refcnt;
521 };
522 
523 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
524 					  void *cb_ident, void *cb_priv,
525 					  void (*release)(void *cb_priv));
526 struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
527 					       void *cb_ident, void *cb_priv,
528 					       void (*release)(void *cb_priv),
529 					       struct flow_block_offload *bo,
530 					       struct net_device *dev,
531 					       struct Qdisc *sch, void *data,
532 					       void *indr_cb_priv,
533 					       void (*cleanup)(struct flow_block_cb *block_cb));
534 void flow_block_cb_free(struct flow_block_cb *block_cb);
535 
536 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
537 					   flow_setup_cb_t *cb, void *cb_ident);
538 
539 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
540 void flow_block_cb_incref(struct flow_block_cb *block_cb);
541 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
542 
flow_block_cb_add(struct flow_block_cb * block_cb,struct flow_block_offload * offload)543 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
544 				     struct flow_block_offload *offload)
545 {
546 	list_add_tail(&block_cb->list, &offload->cb_list);
547 }
548 
flow_block_cb_remove(struct flow_block_cb * block_cb,struct flow_block_offload * offload)549 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
550 					struct flow_block_offload *offload)
551 {
552 	list_move(&block_cb->list, &offload->cb_list);
553 }
554 
flow_indr_block_cb_remove(struct flow_block_cb * block_cb,struct flow_block_offload * offload)555 static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
556 					     struct flow_block_offload *offload)
557 {
558 	list_del(&block_cb->indr.list);
559 	list_move(&block_cb->list, &offload->cb_list);
560 }
561 
562 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
563 			   struct list_head *driver_block_list);
564 
565 int flow_block_cb_setup_simple(struct flow_block_offload *f,
566 			       struct list_head *driver_list,
567 			       flow_setup_cb_t *cb,
568 			       void *cb_ident, void *cb_priv, bool ingress_only);
569 
570 enum flow_cls_command {
571 	FLOW_CLS_REPLACE,
572 	FLOW_CLS_DESTROY,
573 	FLOW_CLS_STATS,
574 	FLOW_CLS_TMPLT_CREATE,
575 	FLOW_CLS_TMPLT_DESTROY,
576 };
577 
578 struct flow_cls_common_offload {
579 	u32 chain_index;
580 	__be16 protocol;
581 	u32 prio;
582 	struct netlink_ext_ack *extack;
583 };
584 
585 struct flow_cls_offload {
586 	struct flow_cls_common_offload common;
587 	enum flow_cls_command command;
588 	unsigned long cookie;
589 	struct flow_rule *rule;
590 	struct flow_stats stats;
591 	u32 classid;
592 };
593 
594 enum offload_act_command  {
595 	FLOW_ACT_REPLACE,
596 	FLOW_ACT_DESTROY,
597 	FLOW_ACT_STATS,
598 };
599 
600 struct flow_offload_action {
601 	struct netlink_ext_ack *extack; /* NULL in FLOW_ACT_STATS process*/
602 	enum offload_act_command  command;
603 	enum flow_action_id id;
604 	u32 index;
605 	struct flow_stats stats;
606 	struct flow_action action;
607 };
608 
609 struct flow_offload_action *offload_action_alloc(unsigned int num_actions);
610 
611 static inline struct flow_rule *
flow_cls_offload_flow_rule(struct flow_cls_offload * flow_cmd)612 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
613 {
614 	return flow_cmd->rule;
615 }
616 
flow_block_init(struct flow_block * flow_block)617 static inline void flow_block_init(struct flow_block *flow_block)
618 {
619 	INIT_LIST_HEAD(&flow_block->cb_list);
620 }
621 
622 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
623 				      enum tc_setup_type type, void *type_data,
624 				      void *data,
625 				      void (*cleanup)(struct flow_block_cb *block_cb));
626 
627 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
628 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
629 			      void (*release)(void *cb_priv));
630 int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
631 				enum tc_setup_type type, void *data,
632 				struct flow_block_offload *bo,
633 				void (*cleanup)(struct flow_block_cb *block_cb));
634 bool flow_indr_dev_exists(void);
635 
636 #endif /* _NET_FLOW_OFFLOAD_H */
637