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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
9struct flow_match {
10 struct flow_dissector *dissector;
11 void *mask;
12 void *key;
13};
14
15struct flow_match_meta {
16 struct flow_dissector_key_meta *key, *mask;
17};
18
19struct flow_match_basic {
20 struct flow_dissector_key_basic *key, *mask;
21};
22
23struct flow_match_control {
24 struct flow_dissector_key_control *key, *mask;
25};
26
27struct flow_match_eth_addrs {
28 struct flow_dissector_key_eth_addrs *key, *mask;
29};
30
31struct flow_match_vlan {
32 struct flow_dissector_key_vlan *key, *mask;
33};
34
35struct flow_match_ipv4_addrs {
36 struct flow_dissector_key_ipv4_addrs *key, *mask;
37};
38
39struct flow_match_ipv6_addrs {
40 struct flow_dissector_key_ipv6_addrs *key, *mask;
41};
42
43struct flow_match_ip {
44 struct flow_dissector_key_ip *key, *mask;
45};
46
47struct flow_match_ports {
48 struct flow_dissector_key_ports *key, *mask;
49};
50
51struct flow_match_icmp {
52 struct flow_dissector_key_icmp *key, *mask;
53};
54
55struct flow_match_tcp {
56 struct flow_dissector_key_tcp *key, *mask;
57};
58
59struct flow_match_mpls {
60 struct flow_dissector_key_mpls *key, *mask;
61};
62
63struct flow_match_enc_keyid {
64 struct flow_dissector_key_keyid *key, *mask;
65};
66
67struct flow_match_enc_opts {
68 struct flow_dissector_key_enc_opts *key, *mask;
69};
70
71struct flow_match_ct {
72 struct flow_dissector_key_ct *key, *mask;
73};
74
75struct flow_rule;
76
77void flow_rule_match_meta(const struct flow_rule *rule,
78 struct flow_match_meta *out);
79void flow_rule_match_basic(const struct flow_rule *rule,
80 struct flow_match_basic *out);
81void flow_rule_match_control(const struct flow_rule *rule,
82 struct flow_match_control *out);
83void flow_rule_match_eth_addrs(const struct flow_rule *rule,
84 struct flow_match_eth_addrs *out);
85void flow_rule_match_vlan(const struct flow_rule *rule,
86 struct flow_match_vlan *out);
87void flow_rule_match_cvlan(const struct flow_rule *rule,
88 struct flow_match_vlan *out);
89void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
90 struct flow_match_ipv4_addrs *out);
91void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
92 struct flow_match_ipv6_addrs *out);
93void flow_rule_match_ip(const struct flow_rule *rule,
94 struct flow_match_ip *out);
95void flow_rule_match_ports(const struct flow_rule *rule,
96 struct flow_match_ports *out);
97void flow_rule_match_tcp(const struct flow_rule *rule,
98 struct flow_match_tcp *out);
99void flow_rule_match_icmp(const struct flow_rule *rule,
100 struct flow_match_icmp *out);
101void flow_rule_match_mpls(const struct flow_rule *rule,
102 struct flow_match_mpls *out);
103void flow_rule_match_enc_control(const struct flow_rule *rule,
104 struct flow_match_control *out);
105void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
106 struct flow_match_ipv4_addrs *out);
107void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
108 struct flow_match_ipv6_addrs *out);
109void flow_rule_match_enc_ip(const struct flow_rule *rule,
110 struct flow_match_ip *out);
111void flow_rule_match_enc_ports(const struct flow_rule *rule,
112 struct flow_match_ports *out);
113void flow_rule_match_enc_keyid(const struct flow_rule *rule,
114 struct flow_match_enc_keyid *out);
115void flow_rule_match_enc_opts(const struct flow_rule *rule,
116 struct flow_match_enc_opts *out);
117void flow_rule_match_ct(const struct flow_rule *rule,
118 struct flow_match_ct *out);
119
120enum flow_action_id {
121 FLOW_ACTION_ACCEPT = 0,
122 FLOW_ACTION_DROP,
123 FLOW_ACTION_TRAP,
124 FLOW_ACTION_GOTO,
125 FLOW_ACTION_REDIRECT,
126 FLOW_ACTION_MIRRED,
127 FLOW_ACTION_REDIRECT_INGRESS,
128 FLOW_ACTION_MIRRED_INGRESS,
129 FLOW_ACTION_VLAN_PUSH,
130 FLOW_ACTION_VLAN_POP,
131 FLOW_ACTION_VLAN_MANGLE,
132 FLOW_ACTION_TUNNEL_ENCAP,
133 FLOW_ACTION_TUNNEL_DECAP,
134 FLOW_ACTION_MANGLE,
135 FLOW_ACTION_ADD,
136 FLOW_ACTION_CSUM,
137 FLOW_ACTION_MARK,
138 FLOW_ACTION_PTYPE,
139 FLOW_ACTION_PRIORITY,
140 FLOW_ACTION_WAKE,
141 FLOW_ACTION_QUEUE,
142 FLOW_ACTION_SAMPLE,
143 FLOW_ACTION_POLICE,
144 FLOW_ACTION_CT,
145 FLOW_ACTION_CT_METADATA,
146 FLOW_ACTION_MPLS_PUSH,
147 FLOW_ACTION_MPLS_POP,
148 FLOW_ACTION_MPLS_MANGLE,
149 FLOW_ACTION_GATE,
150 FLOW_ACTION_PPPOE_PUSH,
151 NUM_FLOW_ACTIONS,
152};
153
154/* This is mirroring enum pedit_header_type definition for easy mapping between
155 * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
156 * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
157 */
158enum flow_action_mangle_base {
159 FLOW_ACT_MANGLE_UNSPEC = 0,
160 FLOW_ACT_MANGLE_HDR_TYPE_ETH,
161 FLOW_ACT_MANGLE_HDR_TYPE_IP4,
162 FLOW_ACT_MANGLE_HDR_TYPE_IP6,
163 FLOW_ACT_MANGLE_HDR_TYPE_TCP,
164 FLOW_ACT_MANGLE_HDR_TYPE_UDP,
165};
166
167enum flow_action_hw_stats_bit {
168 FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
169 FLOW_ACTION_HW_STATS_DELAYED_BIT,
170 FLOW_ACTION_HW_STATS_DISABLED_BIT,
171
172 FLOW_ACTION_HW_STATS_NUM_BITS
173};
174
175enum flow_action_hw_stats {
176 FLOW_ACTION_HW_STATS_IMMEDIATE =
177 BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
178 FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
179 FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
180 FLOW_ACTION_HW_STATS_DELAYED,
181 FLOW_ACTION_HW_STATS_DISABLED =
182 BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
183 FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
184};
185
186typedef void (*action_destr)(void *priv);
187
188struct flow_action_cookie {
189 u32 cookie_len;
190 u8 cookie[];
191};
192
193struct flow_action_cookie *flow_action_cookie_create(void *data,
194 unsigned int len,
195 gfp_t gfp);
196void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
197
198struct flow_action_entry {
199 enum flow_action_id id;
200 enum flow_action_hw_stats hw_stats;
201 action_destr destructor;
202 void *destructor_priv;
203 union {
204 u32 chain_index; /* FLOW_ACTION_GOTO */
205 struct net_device *dev; /* FLOW_ACTION_REDIRECT */
206 struct { /* FLOW_ACTION_VLAN */
207 u16 vid;
208 __be16 proto;
209 u8 prio;
210 } vlan;
211 struct { /* FLOW_ACTION_MANGLE */
212 /* FLOW_ACTION_ADD */
213 enum flow_action_mangle_base htype;
214 u32 offset;
215 u32 mask;
216 u32 val;
217 } mangle;
218 struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
219 u32 csum_flags; /* FLOW_ACTION_CSUM */
220 u32 mark; /* FLOW_ACTION_MARK */
221 u16 ptype; /* FLOW_ACTION_PTYPE */
222 u32 priority; /* FLOW_ACTION_PRIORITY */
223 struct { /* FLOW_ACTION_QUEUE */
224 u32 ctx;
225 u32 index;
226 u8 vf;
227 } queue;
228 struct { /* FLOW_ACTION_SAMPLE */
229 struct psample_group *psample_group;
230 u32 rate;
231 u32 trunc_size;
232 bool truncate;
233 } sample;
234 struct { /* FLOW_ACTION_POLICE */
235 u32 index;
236 u32 burst;
237 u64 rate_bytes_ps;
238 u64 burst_pkt;
239 u64 rate_pkt_ps;
240 u32 mtu;
241 } police;
242 struct { /* FLOW_ACTION_CT */
243 int action;
244 u16 zone;
245 struct nf_flowtable *flow_table;
246 } ct;
247 struct {
248 unsigned long cookie;
249 u32 mark;
250 u32 labels[4];
251 bool orig_dir;
252 } ct_metadata;
253 struct { /* FLOW_ACTION_MPLS_PUSH */
254 u32 label;
255 __be16 proto;
256 u8 tc;
257 u8 bos;
258 u8 ttl;
259 } mpls_push;
260 struct { /* FLOW_ACTION_MPLS_POP */
261 __be16 proto;
262 } mpls_pop;
263 struct { /* FLOW_ACTION_MPLS_MANGLE */
264 u32 label;
265 u8 tc;
266 u8 bos;
267 u8 ttl;
268 } mpls_mangle;
269 struct {
270 u32 index;
271 s32 prio;
272 u64 basetime;
273 u64 cycletime;
274 u64 cycletimeext;
275 u32 num_entries;
276 struct action_gate_entry *entries;
277 } gate;
278 struct { /* FLOW_ACTION_PPPOE_PUSH */
279 u16 sid;
280 } pppoe;
281 };
282 struct flow_action_cookie *cookie; /* user defined action cookie */
283};
284
285struct flow_action {
286 unsigned int num_entries;
287 struct flow_action_entry entries[];
288};
289
290static inline bool flow_action_has_entries(const struct flow_action *action)
291{
292 return action->num_entries;
293}
294
295/**
296 * flow_offload_has_one_action() - check if exactly one action is present
297 * @action: tc filter flow offload action
298 *
299 * Returns true if exactly one action is present.
300 */
301static inline bool flow_offload_has_one_action(const struct flow_action *action)
302{
303 return action->num_entries == 1;
304}
305
306#define flow_action_for_each(__i, __act, __actions) \
307 for (__i = 0, __act = &(__actions)->entries[0]; \
308 __i < (__actions)->num_entries; \
309 __act = &(__actions)->entries[++__i])
310
311static inline bool
312flow_action_mixed_hw_stats_check(const struct flow_action *action,
313 struct netlink_ext_ack *extack)
314{
315 const struct flow_action_entry *action_entry;
316 u8 last_hw_stats;
317 int i;
318
319 if (flow_offload_has_one_action(action))
320 return true;
321
322 flow_action_for_each(i, action_entry, action) {
323 if (i && action_entry->hw_stats != last_hw_stats) {
324 NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
325 return false;
326 }
327 last_hw_stats = action_entry->hw_stats;
328 }
329 return true;
330}
331
332static inline const struct flow_action_entry *
333flow_action_first_entry_get(const struct flow_action *action)
334{
335 WARN_ON(!flow_action_has_entries(action));
336 return &action->entries[0];
337}
338
339static inline bool
340__flow_action_hw_stats_check(const struct flow_action *action,
341 struct netlink_ext_ack *extack,
342 bool check_allow_bit,
343 enum flow_action_hw_stats_bit allow_bit)
344{
345 const struct flow_action_entry *action_entry;
346
347 if (!flow_action_has_entries(action))
348 return true;
349 if (!flow_action_mixed_hw_stats_check(action, extack))
350 return false;
351
352 action_entry = flow_action_first_entry_get(action);
353
354 /* Zero is not a legal value for hw_stats, catch anyone passing it */
355 WARN_ON_ONCE(!action_entry->hw_stats);
356
357 if (!check_allow_bit &&
358 ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
359 NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
360 return false;
361 } else if (check_allow_bit &&
362 !(action_entry->hw_stats & BIT(allow_bit))) {
363 NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
364 return false;
365 }
366 return true;
367}
368
369static inline bool
370flow_action_hw_stats_check(const struct flow_action *action,
371 struct netlink_ext_ack *extack,
372 enum flow_action_hw_stats_bit allow_bit)
373{
374 return __flow_action_hw_stats_check(action, extack, true, allow_bit);
375}
376
377static inline bool
378flow_action_basic_hw_stats_check(const struct flow_action *action,
379 struct netlink_ext_ack *extack)
380{
381 return __flow_action_hw_stats_check(action, extack, false, 0);
382}
383
384struct flow_rule {
385 struct flow_match match;
386 struct flow_action action;
387};
388
389struct flow_rule *flow_rule_alloc(unsigned int num_actions);
390
391static inline bool flow_rule_match_key(const struct flow_rule *rule,
392 enum flow_dissector_key_id key)
393{
394 return dissector_uses_key(rule->match.dissector, key);
395}
396
397struct flow_stats {
398 u64 pkts;
399 u64 bytes;
400 u64 drops;
401 u64 lastused;
402 enum flow_action_hw_stats used_hw_stats;
403 bool used_hw_stats_valid;
404};
405
406static inline void flow_stats_update(struct flow_stats *flow_stats,
407 u64 bytes, u64 pkts,
408 u64 drops, u64 lastused,
409 enum flow_action_hw_stats used_hw_stats)
410{
411 flow_stats->pkts += pkts;
412 flow_stats->bytes += bytes;
413 flow_stats->drops += drops;
414 flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused);
415
416 /* The driver should pass value with a maximum of one bit set.
417 * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
418 */
419 WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
420 flow_stats->used_hw_stats |= used_hw_stats;
421 flow_stats->used_hw_stats_valid = true;
422}
423
424enum flow_block_command {
425 FLOW_BLOCK_BIND,
426 FLOW_BLOCK_UNBIND,
427};
428
429enum flow_block_binder_type {
430 FLOW_BLOCK_BINDER_TYPE_UNSPEC,
431 FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
432 FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
433 FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
434 FLOW_BLOCK_BINDER_TYPE_RED_MARK,
435};
436
437struct flow_block {
438 struct list_head cb_list;
439};
440
441struct netlink_ext_ack;
442
443struct flow_block_offload {
444 enum flow_block_command command;
445 enum flow_block_binder_type binder_type;
446 bool block_shared;
447 bool unlocked_driver_cb;
448 struct net *net;
449 struct flow_block *block;
450 struct list_head cb_list;
451 struct list_head *driver_block_list;
452 struct netlink_ext_ack *extack;
453 struct Qdisc *sch;
454 struct list_head *cb_list_head;
455};
456
457enum tc_setup_type;
458typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
459 void *cb_priv);
460
461struct flow_block_cb;
462
463struct flow_block_indr {
464 struct list_head list;
465 struct net_device *dev;
466 struct Qdisc *sch;
467 enum flow_block_binder_type binder_type;
468 void *data;
469 void *cb_priv;
470 void (*cleanup)(struct flow_block_cb *block_cb);
471};
472
473struct flow_block_cb {
474 struct list_head driver_list;
475 struct list_head list;
476 flow_setup_cb_t *cb;
477 void *cb_ident;
478 void *cb_priv;
479 void (*release)(void *cb_priv);
480 struct flow_block_indr indr;
481 unsigned int refcnt;
482};
483
484struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
485 void *cb_ident, void *cb_priv,
486 void (*release)(void *cb_priv));
487struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
488 void *cb_ident, void *cb_priv,
489 void (*release)(void *cb_priv),
490 struct flow_block_offload *bo,
491 struct net_device *dev,
492 struct Qdisc *sch, void *data,
493 void *indr_cb_priv,
494 void (*cleanup)(struct flow_block_cb *block_cb));
495void flow_block_cb_free(struct flow_block_cb *block_cb);
496
497struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
498 flow_setup_cb_t *cb, void *cb_ident);
499
500void *flow_block_cb_priv(struct flow_block_cb *block_cb);
501void flow_block_cb_incref(struct flow_block_cb *block_cb);
502unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
503
504static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
505 struct flow_block_offload *offload)
506{
507 list_add_tail(&block_cb->list, &offload->cb_list);
508}
509
510static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
511 struct flow_block_offload *offload)
512{
513 list_move(&block_cb->list, &offload->cb_list);
514}
515
516static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
517 struct flow_block_offload *offload)
518{
519 list_del(&block_cb->indr.list);
520 list_move(&block_cb->list, &offload->cb_list);
521}
522
523bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
524 struct list_head *driver_block_list);
525
526int flow_block_cb_setup_simple(struct flow_block_offload *f,
527 struct list_head *driver_list,
528 flow_setup_cb_t *cb,
529 void *cb_ident, void *cb_priv, bool ingress_only);
530
531enum flow_cls_command {
532 FLOW_CLS_REPLACE,
533 FLOW_CLS_DESTROY,
534 FLOW_CLS_STATS,
535 FLOW_CLS_TMPLT_CREATE,
536 FLOW_CLS_TMPLT_DESTROY,
537};
538
539struct flow_cls_common_offload {
540 u32 chain_index;
541 __be16 protocol;
542 u32 prio;
543 struct netlink_ext_ack *extack;
544};
545
546struct flow_cls_offload {
547 struct flow_cls_common_offload common;
548 enum flow_cls_command command;
549 unsigned long cookie;
550 struct flow_rule *rule;
551 struct flow_stats stats;
552 u32 classid;
553};
554
555static inline struct flow_rule *
556flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
557{
558 return flow_cmd->rule;
559}
560
561static inline void flow_block_init(struct flow_block *flow_block)
562{
563 INIT_LIST_HEAD(&flow_block->cb_list);
564}
565
566typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
567 enum tc_setup_type type, void *type_data,
568 void *data,
569 void (*cleanup)(struct flow_block_cb *block_cb));
570
571int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
572void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
573 void (*release)(void *cb_priv));
574int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
575 enum tc_setup_type type, void *data,
576 struct flow_block_offload *bo,
577 void (*cleanup)(struct flow_block_cb *block_cb));
578
579#endif /* _NET_FLOW_OFFLOAD_H */
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
9struct flow_match {
10 struct flow_dissector *dissector;
11 void *mask;
12 void *key;
13};
14
15struct flow_match_meta {
16 struct flow_dissector_key_meta *key, *mask;
17};
18
19struct flow_match_basic {
20 struct flow_dissector_key_basic *key, *mask;
21};
22
23struct flow_match_control {
24 struct flow_dissector_key_control *key, *mask;
25};
26
27struct flow_match_eth_addrs {
28 struct flow_dissector_key_eth_addrs *key, *mask;
29};
30
31struct flow_match_vlan {
32 struct flow_dissector_key_vlan *key, *mask;
33};
34
35struct flow_match_arp {
36 struct flow_dissector_key_arp *key, *mask;
37};
38
39struct flow_match_ipv4_addrs {
40 struct flow_dissector_key_ipv4_addrs *key, *mask;
41};
42
43struct flow_match_ipv6_addrs {
44 struct flow_dissector_key_ipv6_addrs *key, *mask;
45};
46
47struct flow_match_ip {
48 struct flow_dissector_key_ip *key, *mask;
49};
50
51struct flow_match_ports {
52 struct flow_dissector_key_ports *key, *mask;
53};
54
55struct flow_match_ports_range {
56 struct flow_dissector_key_ports_range *key, *mask;
57};
58
59struct flow_match_icmp {
60 struct flow_dissector_key_icmp *key, *mask;
61};
62
63struct flow_match_tcp {
64 struct flow_dissector_key_tcp *key, *mask;
65};
66
67struct flow_match_ipsec {
68 struct flow_dissector_key_ipsec *key, *mask;
69};
70
71struct flow_match_mpls {
72 struct flow_dissector_key_mpls *key, *mask;
73};
74
75struct flow_match_enc_keyid {
76 struct flow_dissector_key_keyid *key, *mask;
77};
78
79struct flow_match_enc_opts {
80 struct flow_dissector_key_enc_opts *key, *mask;
81};
82
83struct flow_match_ct {
84 struct flow_dissector_key_ct *key, *mask;
85};
86
87struct flow_match_pppoe {
88 struct flow_dissector_key_pppoe *key, *mask;
89};
90
91struct flow_match_l2tpv3 {
92 struct flow_dissector_key_l2tpv3 *key, *mask;
93};
94
95struct flow_rule;
96
97void flow_rule_match_meta(const struct flow_rule *rule,
98 struct flow_match_meta *out);
99void flow_rule_match_basic(const struct flow_rule *rule,
100 struct flow_match_basic *out);
101void flow_rule_match_control(const struct flow_rule *rule,
102 struct flow_match_control *out);
103void flow_rule_match_eth_addrs(const struct flow_rule *rule,
104 struct flow_match_eth_addrs *out);
105void flow_rule_match_vlan(const struct flow_rule *rule,
106 struct flow_match_vlan *out);
107void flow_rule_match_cvlan(const struct flow_rule *rule,
108 struct flow_match_vlan *out);
109void flow_rule_match_arp(const struct flow_rule *rule,
110 struct flow_match_arp *out);
111void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
112 struct flow_match_ipv4_addrs *out);
113void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
114 struct flow_match_ipv6_addrs *out);
115void flow_rule_match_ip(const struct flow_rule *rule,
116 struct flow_match_ip *out);
117void flow_rule_match_ports(const struct flow_rule *rule,
118 struct flow_match_ports *out);
119void flow_rule_match_ports_range(const struct flow_rule *rule,
120 struct flow_match_ports_range *out);
121void flow_rule_match_tcp(const struct flow_rule *rule,
122 struct flow_match_tcp *out);
123void flow_rule_match_ipsec(const struct flow_rule *rule,
124 struct flow_match_ipsec *out);
125void flow_rule_match_icmp(const struct flow_rule *rule,
126 struct flow_match_icmp *out);
127void flow_rule_match_mpls(const struct flow_rule *rule,
128 struct flow_match_mpls *out);
129void flow_rule_match_enc_control(const struct flow_rule *rule,
130 struct flow_match_control *out);
131void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
132 struct flow_match_ipv4_addrs *out);
133void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
134 struct flow_match_ipv6_addrs *out);
135void flow_rule_match_enc_ip(const struct flow_rule *rule,
136 struct flow_match_ip *out);
137void flow_rule_match_enc_ports(const struct flow_rule *rule,
138 struct flow_match_ports *out);
139void flow_rule_match_enc_keyid(const struct flow_rule *rule,
140 struct flow_match_enc_keyid *out);
141void flow_rule_match_enc_opts(const struct flow_rule *rule,
142 struct flow_match_enc_opts *out);
143void flow_rule_match_ct(const struct flow_rule *rule,
144 struct flow_match_ct *out);
145void flow_rule_match_pppoe(const struct flow_rule *rule,
146 struct flow_match_pppoe *out);
147void flow_rule_match_l2tpv3(const struct flow_rule *rule,
148 struct flow_match_l2tpv3 *out);
149
150enum 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 */
194enum 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
203enum 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
211enum 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
222typedef void (*action_destr)(void *priv);
223
224struct flow_action_cookie {
225 u32 cookie_len;
226 u8 cookie[];
227};
228
229struct flow_action_cookie *flow_action_cookie_create(void *data,
230 unsigned int len,
231 gfp_t gfp);
232void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
233
234struct 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
334struct flow_action {
335 unsigned int num_entries;
336 struct flow_action_entry entries[] __counted_by(num_entries);
337};
338
339static 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 */
350static inline bool flow_offload_has_one_action(const struct flow_action *action)
351{
352 return action->num_entries == 1;
353}
354
355static 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
366static inline bool
367flow_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
387static inline const struct flow_action_entry *
388flow_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
394static inline bool
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
424static inline bool
425flow_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
432static inline bool
433flow_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
439struct flow_rule {
440 struct flow_match match;
441 struct flow_action action;
442};
443
444struct flow_rule *flow_rule_alloc(unsigned int num_actions);
445
446static 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
452struct 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
461static 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
479enum flow_block_command {
480 FLOW_BLOCK_BIND,
481 FLOW_BLOCK_UNBIND,
482};
483
484enum 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
492struct flow_block {
493 struct list_head cb_list;
494};
495
496struct netlink_ext_ack;
497
498struct 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
512enum tc_setup_type;
513typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
514 void *cb_priv);
515
516struct flow_block_cb;
517
518struct 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
528struct 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
539struct 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));
542struct 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));
550void flow_block_cb_free(struct flow_block_cb *block_cb);
551
552struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
553 flow_setup_cb_t *cb, void *cb_ident);
554
555void *flow_block_cb_priv(struct flow_block_cb *block_cb);
556void flow_block_cb_incref(struct flow_block_cb *block_cb);
557unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
558
559static 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
565static 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
571static 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
578bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
579 struct list_head *driver_block_list);
580
581int 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
586enum 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
594struct flow_cls_common_offload {
595 u32 chain_index;
596 __be16 protocol;
597 u32 prio;
598 struct netlink_ext_ack *extack;
599};
600
601struct 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
611enum offload_act_command {
612 FLOW_ACT_REPLACE,
613 FLOW_ACT_DESTROY,
614 FLOW_ACT_STATS,
615};
616
617struct 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
627struct flow_offload_action *offload_action_alloc(unsigned int num_actions);
628
629static inline struct flow_rule *
630flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
631{
632 return flow_cmd->rule;
633}
634
635static inline void flow_block_init(struct flow_block *flow_block)
636{
637 INIT_LIST_HEAD(&flow_block->cb_list);
638}
639
640typedef 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
645int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
646void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
647 void (*release)(void *cb_priv));
648int 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));
652bool flow_indr_dev_exists(void);
653
654#endif /* _NET_FLOW_OFFLOAD_H */