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_arp {
36 	struct flow_dissector_key_arp *key, *mask;
37 };
38 
39 struct flow_match_ipv4_addrs {
40 	struct flow_dissector_key_ipv4_addrs *key, *mask;
41 };
42 
43 struct flow_match_ipv6_addrs {
44 	struct flow_dissector_key_ipv6_addrs *key, *mask;
45 };
46 
47 struct flow_match_ip {
48 	struct flow_dissector_key_ip *key, *mask;
49 };
50 
51 struct flow_match_ports {
52 	struct flow_dissector_key_ports *key, *mask;
53 };
54 
55 struct flow_match_ports_range {
56 	struct flow_dissector_key_ports_range *key, *mask;
57 };
58 
59 struct flow_match_icmp {
60 	struct flow_dissector_key_icmp *key, *mask;
61 };
62 
63 struct flow_match_tcp {
64 	struct flow_dissector_key_tcp *key, *mask;
65 };
66 
67 struct flow_match_ipsec {
68 	struct flow_dissector_key_ipsec *key, *mask;
69 };
70 
71 struct flow_match_mpls {
72 	struct flow_dissector_key_mpls *key, *mask;
73 };
74 
75 struct flow_match_enc_keyid {
76 	struct flow_dissector_key_keyid *key, *mask;
77 };
78 
79 struct flow_match_enc_opts {
80 	struct flow_dissector_key_enc_opts *key, *mask;
81 };
82 
83 struct flow_match_ct {
84 	struct flow_dissector_key_ct *key, *mask;
85 };
86 
87 struct flow_match_pppoe {
88 	struct flow_dissector_key_pppoe *key, *mask;
89 };
90 
91 struct flow_match_l2tpv3 {
92 	struct flow_dissector_key_l2tpv3 *key, *mask;
93 };
94 
95 struct flow_rule;
96 
97 void flow_rule_match_meta(const struct flow_rule *rule,
98 			  struct flow_match_meta *out);
99 void flow_rule_match_basic(const struct flow_rule *rule,
100 			   struct flow_match_basic *out);
101 void flow_rule_match_control(const struct flow_rule *rule,
102 			     struct flow_match_control *out);
103 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
104 			       struct flow_match_eth_addrs *out);
105 void flow_rule_match_vlan(const struct flow_rule *rule,
106 			  struct flow_match_vlan *out);
107 void flow_rule_match_cvlan(const struct flow_rule *rule,
108 			   struct flow_match_vlan *out);
109 void flow_rule_match_arp(const struct flow_rule *rule,
110 			 struct flow_match_arp *out);
111 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
112 				struct flow_match_ipv4_addrs *out);
113 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
114 				struct flow_match_ipv6_addrs *out);
115 void flow_rule_match_ip(const struct flow_rule *rule,
116 			struct flow_match_ip *out);
117 void flow_rule_match_ports(const struct flow_rule *rule,
118 			   struct flow_match_ports *out);
119 void flow_rule_match_ports_range(const struct flow_rule *rule,
120 				 struct flow_match_ports_range *out);
121 void flow_rule_match_tcp(const struct flow_rule *rule,
122 			 struct flow_match_tcp *out);
123 void flow_rule_match_ipsec(const struct flow_rule *rule,
124 			   struct flow_match_ipsec *out);
125 void flow_rule_match_icmp(const struct flow_rule *rule,
126 			  struct flow_match_icmp *out);
127 void flow_rule_match_mpls(const struct flow_rule *rule,
128 			  struct flow_match_mpls *out);
129 void flow_rule_match_enc_control(const struct flow_rule *rule,
130 				 struct flow_match_control *out);
131 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
132 				    struct flow_match_ipv4_addrs *out);
133 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
134 				    struct flow_match_ipv6_addrs *out);
135 void flow_rule_match_enc_ip(const struct flow_rule *rule,
136 			    struct flow_match_ip *out);
137 void flow_rule_match_enc_ports(const struct flow_rule *rule,
138 			       struct flow_match_ports *out);
139 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
140 			       struct flow_match_enc_keyid *out);
141 void flow_rule_match_enc_opts(const struct flow_rule *rule,
142 			      struct flow_match_enc_opts *out);
143 void flow_rule_match_ct(const struct flow_rule *rule,
144 			struct flow_match_ct *out);
145 void flow_rule_match_pppoe(const struct flow_rule *rule,
146 			   struct flow_match_pppoe *out);
147 void flow_rule_match_l2tpv3(const struct flow_rule *rule,
148 			    struct flow_match_l2tpv3 *out);
149 
150 enum flow_action_id {
151 	FLOW_ACTION_ACCEPT		= 0,
152 	FLOW_ACTION_DROP,
153 	FLOW_ACTION_TRAP,
154 	FLOW_ACTION_GOTO,
155 	FLOW_ACTION_REDIRECT,
156 	FLOW_ACTION_MIRRED,
157 	FLOW_ACTION_REDIRECT_INGRESS,
158 	FLOW_ACTION_MIRRED_INGRESS,
159 	FLOW_ACTION_VLAN_PUSH,
160 	FLOW_ACTION_VLAN_POP,
161 	FLOW_ACTION_VLAN_MANGLE,
162 	FLOW_ACTION_TUNNEL_ENCAP,
163 	FLOW_ACTION_TUNNEL_DECAP,
164 	FLOW_ACTION_MANGLE,
165 	FLOW_ACTION_ADD,
166 	FLOW_ACTION_CSUM,
167 	FLOW_ACTION_MARK,
168 	FLOW_ACTION_PTYPE,
169 	FLOW_ACTION_PRIORITY,
170 	FLOW_ACTION_RX_QUEUE_MAPPING,
171 	FLOW_ACTION_WAKE,
172 	FLOW_ACTION_QUEUE,
173 	FLOW_ACTION_SAMPLE,
174 	FLOW_ACTION_POLICE,
175 	FLOW_ACTION_CT,
176 	FLOW_ACTION_CT_METADATA,
177 	FLOW_ACTION_MPLS_PUSH,
178 	FLOW_ACTION_MPLS_POP,
179 	FLOW_ACTION_MPLS_MANGLE,
180 	FLOW_ACTION_GATE,
181 	FLOW_ACTION_PPPOE_PUSH,
182 	FLOW_ACTION_JUMP,
183 	FLOW_ACTION_PIPE,
184 	FLOW_ACTION_VLAN_PUSH_ETH,
185 	FLOW_ACTION_VLAN_POP_ETH,
186 	FLOW_ACTION_CONTINUE,
187 	NUM_FLOW_ACTIONS,
188 };
189 
190 /* This is mirroring enum pedit_header_type definition for easy mapping between
191  * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
192  * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
193  */
194 enum flow_action_mangle_base {
195 	FLOW_ACT_MANGLE_UNSPEC		= 0,
196 	FLOW_ACT_MANGLE_HDR_TYPE_ETH,
197 	FLOW_ACT_MANGLE_HDR_TYPE_IP4,
198 	FLOW_ACT_MANGLE_HDR_TYPE_IP6,
199 	FLOW_ACT_MANGLE_HDR_TYPE_TCP,
200 	FLOW_ACT_MANGLE_HDR_TYPE_UDP,
201 };
202 
203 enum flow_action_hw_stats_bit {
204 	FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
205 	FLOW_ACTION_HW_STATS_DELAYED_BIT,
206 	FLOW_ACTION_HW_STATS_DISABLED_BIT,
207 
208 	FLOW_ACTION_HW_STATS_NUM_BITS
209 };
210 
211 enum flow_action_hw_stats {
212 	FLOW_ACTION_HW_STATS_IMMEDIATE =
213 		BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
214 	FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
215 	FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
216 				   FLOW_ACTION_HW_STATS_DELAYED,
217 	FLOW_ACTION_HW_STATS_DISABLED =
218 		BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
219 	FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
220 };
221 
222 typedef void (*action_destr)(void *priv);
223 
224 struct flow_action_cookie {
225 	u32 cookie_len;
226 	u8 cookie[];
227 };
228 
229 struct flow_action_cookie *flow_action_cookie_create(void *data,
230 						     unsigned int len,
231 						     gfp_t gfp);
232 void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
233 
234 struct flow_action_entry {
235 	enum flow_action_id		id;
236 	u32				hw_index;
237 	unsigned long			cookie;
238 	u64				miss_cookie;
239 	enum flow_action_hw_stats	hw_stats;
240 	action_destr			destructor;
241 	void				*destructor_priv;
242 	union {
243 		u32			chain_index;	/* FLOW_ACTION_GOTO */
244 		struct net_device	*dev;		/* FLOW_ACTION_REDIRECT */
245 		struct {				/* FLOW_ACTION_VLAN */
246 			u16		vid;
247 			__be16		proto;
248 			u8		prio;
249 		} vlan;
250 		struct {				/* FLOW_ACTION_VLAN_PUSH_ETH */
251 			unsigned char dst[ETH_ALEN];
252 			unsigned char src[ETH_ALEN];
253 		} vlan_push_eth;
254 		struct {				/* FLOW_ACTION_MANGLE */
255 							/* FLOW_ACTION_ADD */
256 			enum flow_action_mangle_base htype;
257 			u32		offset;
258 			u32		mask;
259 			u32		val;
260 		} mangle;
261 		struct ip_tunnel_info	*tunnel;	/* FLOW_ACTION_TUNNEL_ENCAP */
262 		u32			csum_flags;	/* FLOW_ACTION_CSUM */
263 		u32			mark;		/* FLOW_ACTION_MARK */
264 		u16                     ptype;          /* FLOW_ACTION_PTYPE */
265 		u16			rx_queue;	/* FLOW_ACTION_RX_QUEUE_MAPPING */
266 		u32			priority;	/* FLOW_ACTION_PRIORITY */
267 		struct {				/* FLOW_ACTION_QUEUE */
268 			u32		ctx;
269 			u32		index;
270 			u8		vf;
271 		} queue;
272 		struct {				/* FLOW_ACTION_SAMPLE */
273 			struct psample_group	*psample_group;
274 			u32			rate;
275 			u32			trunc_size;
276 			bool			truncate;
277 		} sample;
278 		struct {				/* FLOW_ACTION_POLICE */
279 			u32			burst;
280 			u64			rate_bytes_ps;
281 			u64			peakrate_bytes_ps;
282 			u32			avrate;
283 			u16			overhead;
284 			u64			burst_pkt;
285 			u64			rate_pkt_ps;
286 			u32			mtu;
287 			struct {
288 				enum flow_action_id	act_id;
289 				u32			extval;
290 			} exceed, notexceed;
291 		} police;
292 		struct {				/* FLOW_ACTION_CT */
293 			int action;
294 			u16 zone;
295 			struct nf_flowtable *flow_table;
296 		} ct;
297 		struct {
298 			unsigned long cookie;
299 			u32 mark;
300 			u32 labels[4];
301 			bool orig_dir;
302 		} ct_metadata;
303 		struct {				/* FLOW_ACTION_MPLS_PUSH */
304 			u32		label;
305 			__be16		proto;
306 			u8		tc;
307 			u8		bos;
308 			u8		ttl;
309 		} mpls_push;
310 		struct {				/* FLOW_ACTION_MPLS_POP */
311 			__be16		proto;
312 		} mpls_pop;
313 		struct {				/* FLOW_ACTION_MPLS_MANGLE */
314 			u32		label;
315 			u8		tc;
316 			u8		bos;
317 			u8		ttl;
318 		} mpls_mangle;
319 		struct {
320 			s32		prio;
321 			u64		basetime;
322 			u64		cycletime;
323 			u64		cycletimeext;
324 			u32		num_entries;
325 			struct action_gate_entry *entries;
326 		} gate;
327 		struct {				/* FLOW_ACTION_PPPOE_PUSH */
328 			u16		sid;
329 		} pppoe;
330 	};
331 	struct flow_action_cookie *user_cookie; /* user defined action cookie */
332 };
333 
334 struct flow_action {
335 	unsigned int			num_entries;
336 	struct flow_action_entry	entries[];
337 };
338 
flow_action_has_entries(const struct flow_action * action)339 static inline bool flow_action_has_entries(const struct flow_action *action)
340 {
341 	return action->num_entries;
342 }
343 
344 /**
345  * flow_offload_has_one_action() - check if exactly one action is present
346  * @action: tc filter flow offload action
347  *
348  * Returns true if exactly one action is present.
349  */
flow_offload_has_one_action(const struct flow_action * action)350 static inline bool flow_offload_has_one_action(const struct flow_action *action)
351 {
352 	return action->num_entries == 1;
353 }
354 
flow_action_is_last_entry(const struct flow_action * action,const struct flow_action_entry * entry)355 static inline bool flow_action_is_last_entry(const struct flow_action *action,
356 					     const struct flow_action_entry *entry)
357 {
358 	return entry == &action->entries[action->num_entries - 1];
359 }
360 
361 #define flow_action_for_each(__i, __act, __actions)			\
362         for (__i = 0, __act = &(__actions)->entries[0];			\
363 	     __i < (__actions)->num_entries;				\
364 	     __act = &(__actions)->entries[++__i])
365 
366 static inline bool
flow_action_mixed_hw_stats_check(const struct flow_action * action,struct netlink_ext_ack * extack)367 flow_action_mixed_hw_stats_check(const struct flow_action *action,
368 				 struct netlink_ext_ack *extack)
369 {
370 	const struct flow_action_entry *action_entry;
371 	u8 last_hw_stats;
372 	int i;
373 
374 	if (flow_offload_has_one_action(action))
375 		return true;
376 
377 	flow_action_for_each(i, action_entry, action) {
378 		if (i && action_entry->hw_stats != last_hw_stats) {
379 			NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
380 			return false;
381 		}
382 		last_hw_stats = action_entry->hw_stats;
383 	}
384 	return true;
385 }
386 
387 static inline const struct flow_action_entry *
flow_action_first_entry_get(const struct flow_action * action)388 flow_action_first_entry_get(const struct flow_action *action)
389 {
390 	WARN_ON(!flow_action_has_entries(action));
391 	return &action->entries[0];
392 }
393 
394 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)395 __flow_action_hw_stats_check(const struct flow_action *action,
396 			     struct netlink_ext_ack *extack,
397 			     bool check_allow_bit,
398 			     enum flow_action_hw_stats_bit allow_bit)
399 {
400 	const struct flow_action_entry *action_entry;
401 
402 	if (!flow_action_has_entries(action))
403 		return true;
404 	if (!flow_action_mixed_hw_stats_check(action, extack))
405 		return false;
406 
407 	action_entry = flow_action_first_entry_get(action);
408 
409 	/* Zero is not a legal value for hw_stats, catch anyone passing it */
410 	WARN_ON_ONCE(!action_entry->hw_stats);
411 
412 	if (!check_allow_bit &&
413 	    ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
414 		NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
415 		return false;
416 	} else if (check_allow_bit &&
417 		   !(action_entry->hw_stats & BIT(allow_bit))) {
418 		NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
419 		return false;
420 	}
421 	return true;
422 }
423 
424 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)425 flow_action_hw_stats_check(const struct flow_action *action,
426 			   struct netlink_ext_ack *extack,
427 			   enum flow_action_hw_stats_bit allow_bit)
428 {
429 	return __flow_action_hw_stats_check(action, extack, true, allow_bit);
430 }
431 
432 static inline bool
flow_action_basic_hw_stats_check(const struct flow_action * action,struct netlink_ext_ack * extack)433 flow_action_basic_hw_stats_check(const struct flow_action *action,
434 				 struct netlink_ext_ack *extack)
435 {
436 	return __flow_action_hw_stats_check(action, extack, false, 0);
437 }
438 
439 struct flow_rule {
440 	struct flow_match	match;
441 	struct flow_action	action;
442 };
443 
444 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
445 
flow_rule_match_key(const struct flow_rule * rule,enum flow_dissector_key_id key)446 static inline bool flow_rule_match_key(const struct flow_rule *rule,
447 				       enum flow_dissector_key_id key)
448 {
449 	return dissector_uses_key(rule->match.dissector, key);
450 }
451 
452 struct flow_stats {
453 	u64	pkts;
454 	u64	bytes;
455 	u64	drops;
456 	u64	lastused;
457 	enum flow_action_hw_stats used_hw_stats;
458 	bool used_hw_stats_valid;
459 };
460 
flow_stats_update(struct flow_stats * flow_stats,u64 bytes,u64 pkts,u64 drops,u64 lastused,enum flow_action_hw_stats used_hw_stats)461 static inline void flow_stats_update(struct flow_stats *flow_stats,
462 				     u64 bytes, u64 pkts,
463 				     u64 drops, u64 lastused,
464 				     enum flow_action_hw_stats used_hw_stats)
465 {
466 	flow_stats->pkts	+= pkts;
467 	flow_stats->bytes	+= bytes;
468 	flow_stats->drops	+= drops;
469 	flow_stats->lastused	= max_t(u64, flow_stats->lastused, lastused);
470 
471 	/* The driver should pass value with a maximum of one bit set.
472 	 * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
473 	 */
474 	WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
475 	flow_stats->used_hw_stats |= used_hw_stats;
476 	flow_stats->used_hw_stats_valid = true;
477 }
478 
479 enum flow_block_command {
480 	FLOW_BLOCK_BIND,
481 	FLOW_BLOCK_UNBIND,
482 };
483 
484 enum flow_block_binder_type {
485 	FLOW_BLOCK_BINDER_TYPE_UNSPEC,
486 	FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
487 	FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
488 	FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
489 	FLOW_BLOCK_BINDER_TYPE_RED_MARK,
490 };
491 
492 struct flow_block {
493 	struct list_head cb_list;
494 };
495 
496 struct netlink_ext_ack;
497 
498 struct flow_block_offload {
499 	enum flow_block_command command;
500 	enum flow_block_binder_type binder_type;
501 	bool block_shared;
502 	bool unlocked_driver_cb;
503 	struct net *net;
504 	struct flow_block *block;
505 	struct list_head cb_list;
506 	struct list_head *driver_block_list;
507 	struct netlink_ext_ack *extack;
508 	struct Qdisc *sch;
509 	struct list_head *cb_list_head;
510 };
511 
512 enum tc_setup_type;
513 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
514 			    void *cb_priv);
515 
516 struct flow_block_cb;
517 
518 struct flow_block_indr {
519 	struct list_head		list;
520 	struct net_device		*dev;
521 	struct Qdisc			*sch;
522 	enum flow_block_binder_type	binder_type;
523 	void				*data;
524 	void				*cb_priv;
525 	void				(*cleanup)(struct flow_block_cb *block_cb);
526 };
527 
528 struct flow_block_cb {
529 	struct list_head	driver_list;
530 	struct list_head	list;
531 	flow_setup_cb_t		*cb;
532 	void			*cb_ident;
533 	void			*cb_priv;
534 	void			(*release)(void *cb_priv);
535 	struct flow_block_indr	indr;
536 	unsigned int		refcnt;
537 };
538 
539 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
540 					  void *cb_ident, void *cb_priv,
541 					  void (*release)(void *cb_priv));
542 struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
543 					       void *cb_ident, void *cb_priv,
544 					       void (*release)(void *cb_priv),
545 					       struct flow_block_offload *bo,
546 					       struct net_device *dev,
547 					       struct Qdisc *sch, void *data,
548 					       void *indr_cb_priv,
549 					       void (*cleanup)(struct flow_block_cb *block_cb));
550 void flow_block_cb_free(struct flow_block_cb *block_cb);
551 
552 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
553 					   flow_setup_cb_t *cb, void *cb_ident);
554 
555 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
556 void flow_block_cb_incref(struct flow_block_cb *block_cb);
557 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
558 
flow_block_cb_add(struct flow_block_cb * block_cb,struct flow_block_offload * offload)559 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
560 				     struct flow_block_offload *offload)
561 {
562 	list_add_tail(&block_cb->list, &offload->cb_list);
563 }
564 
flow_block_cb_remove(struct flow_block_cb * block_cb,struct flow_block_offload * offload)565 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
566 					struct flow_block_offload *offload)
567 {
568 	list_move(&block_cb->list, &offload->cb_list);
569 }
570 
flow_indr_block_cb_remove(struct flow_block_cb * block_cb,struct flow_block_offload * offload)571 static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
572 					     struct flow_block_offload *offload)
573 {
574 	list_del(&block_cb->indr.list);
575 	list_move(&block_cb->list, &offload->cb_list);
576 }
577 
578 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
579 			   struct list_head *driver_block_list);
580 
581 int flow_block_cb_setup_simple(struct flow_block_offload *f,
582 			       struct list_head *driver_list,
583 			       flow_setup_cb_t *cb,
584 			       void *cb_ident, void *cb_priv, bool ingress_only);
585 
586 enum flow_cls_command {
587 	FLOW_CLS_REPLACE,
588 	FLOW_CLS_DESTROY,
589 	FLOW_CLS_STATS,
590 	FLOW_CLS_TMPLT_CREATE,
591 	FLOW_CLS_TMPLT_DESTROY,
592 };
593 
594 struct flow_cls_common_offload {
595 	u32 chain_index;
596 	__be16 protocol;
597 	u32 prio;
598 	struct netlink_ext_ack *extack;
599 };
600 
601 struct flow_cls_offload {
602 	struct flow_cls_common_offload common;
603 	enum flow_cls_command command;
604 	bool use_act_stats;
605 	unsigned long cookie;
606 	struct flow_rule *rule;
607 	struct flow_stats stats;
608 	u32 classid;
609 };
610 
611 enum offload_act_command  {
612 	FLOW_ACT_REPLACE,
613 	FLOW_ACT_DESTROY,
614 	FLOW_ACT_STATS,
615 };
616 
617 struct flow_offload_action {
618 	struct netlink_ext_ack *extack; /* NULL in FLOW_ACT_STATS process*/
619 	enum offload_act_command  command;
620 	enum flow_action_id id;
621 	u32 index;
622 	unsigned long cookie;
623 	struct flow_stats stats;
624 	struct flow_action action;
625 };
626 
627 struct flow_offload_action *offload_action_alloc(unsigned int num_actions);
628 
629 static inline struct flow_rule *
flow_cls_offload_flow_rule(struct flow_cls_offload * flow_cmd)630 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
631 {
632 	return flow_cmd->rule;
633 }
634 
flow_block_init(struct flow_block * flow_block)635 static inline void flow_block_init(struct flow_block *flow_block)
636 {
637 	INIT_LIST_HEAD(&flow_block->cb_list);
638 }
639 
640 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
641 				      enum tc_setup_type type, void *type_data,
642 				      void *data,
643 				      void (*cleanup)(struct flow_block_cb *block_cb));
644 
645 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
646 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
647 			      void (*release)(void *cb_priv));
648 int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
649 				enum tc_setup_type type, void *data,
650 				struct flow_block_offload *bo,
651 				void (*cleanup)(struct flow_block_cb *block_cb));
652 bool flow_indr_dev_exists(void);
653 
654 #endif /* _NET_FLOW_OFFLOAD_H */
655