1 #ifndef _NET_FLOW_OFFLOAD_H
2 #define _NET_FLOW_OFFLOAD_H
4 #include <linux/kernel.h>
5 #include <linux/list.h>
6 #include <linux/netlink.h>
7 #include <net/flow_dissector.h>
10 struct flow_dissector *dissector;
15 struct flow_match_meta {
16 struct flow_dissector_key_meta *key, *mask;
19 struct flow_match_basic {
20 struct flow_dissector_key_basic *key, *mask;
23 struct flow_match_control {
24 struct flow_dissector_key_control *key, *mask;
27 struct flow_match_eth_addrs {
28 struct flow_dissector_key_eth_addrs *key, *mask;
31 struct flow_match_vlan {
32 struct flow_dissector_key_vlan *key, *mask;
35 struct flow_match_ipv4_addrs {
36 struct flow_dissector_key_ipv4_addrs *key, *mask;
39 struct flow_match_ipv6_addrs {
40 struct flow_dissector_key_ipv6_addrs *key, *mask;
43 struct flow_match_ip {
44 struct flow_dissector_key_ip *key, *mask;
47 struct flow_match_ports {
48 struct flow_dissector_key_ports *key, *mask;
51 struct flow_match_icmp {
52 struct flow_dissector_key_icmp *key, *mask;
55 struct flow_match_tcp {
56 struct flow_dissector_key_tcp *key, *mask;
59 struct flow_match_mpls {
60 struct flow_dissector_key_mpls *key, *mask;
63 struct flow_match_enc_keyid {
64 struct flow_dissector_key_keyid *key, *mask;
67 struct flow_match_enc_opts {
68 struct flow_dissector_key_enc_opts *key, *mask;
71 struct flow_match_ct {
72 struct flow_dissector_key_ct *key, *mask;
77 void flow_rule_match_meta(const struct flow_rule *rule,
78 struct flow_match_meta *out);
79 void flow_rule_match_basic(const struct flow_rule *rule,
80 struct flow_match_basic *out);
81 void flow_rule_match_control(const struct flow_rule *rule,
82 struct flow_match_control *out);
83 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
84 struct flow_match_eth_addrs *out);
85 void flow_rule_match_vlan(const struct flow_rule *rule,
86 struct flow_match_vlan *out);
87 void flow_rule_match_cvlan(const struct flow_rule *rule,
88 struct flow_match_vlan *out);
89 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
90 struct flow_match_ipv4_addrs *out);
91 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
92 struct flow_match_ipv6_addrs *out);
93 void flow_rule_match_ip(const struct flow_rule *rule,
94 struct flow_match_ip *out);
95 void flow_rule_match_ports(const struct flow_rule *rule,
96 struct flow_match_ports *out);
97 void flow_rule_match_tcp(const struct flow_rule *rule,
98 struct flow_match_tcp *out);
99 void flow_rule_match_icmp(const struct flow_rule *rule,
100 struct flow_match_icmp *out);
101 void flow_rule_match_mpls(const struct flow_rule *rule,
102 struct flow_match_mpls *out);
103 void flow_rule_match_enc_control(const struct flow_rule *rule,
104 struct flow_match_control *out);
105 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
106 struct flow_match_ipv4_addrs *out);
107 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
108 struct flow_match_ipv6_addrs *out);
109 void flow_rule_match_enc_ip(const struct flow_rule *rule,
110 struct flow_match_ip *out);
111 void flow_rule_match_enc_ports(const struct flow_rule *rule,
112 struct flow_match_ports *out);
113 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
114 struct flow_match_enc_keyid *out);
115 void flow_rule_match_enc_opts(const struct flow_rule *rule,
116 struct flow_match_enc_opts *out);
117 void flow_rule_match_ct(const struct flow_rule *rule,
118 struct flow_match_ct *out);
120 enum flow_action_id {
121 FLOW_ACTION_ACCEPT = 0,
125 FLOW_ACTION_REDIRECT,
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,
139 FLOW_ACTION_PRIORITY,
145 FLOW_ACTION_CT_METADATA,
146 FLOW_ACTION_MPLS_PUSH,
147 FLOW_ACTION_MPLS_POP,
148 FLOW_ACTION_MPLS_MANGLE,
153 /* This is mirroring enum pedit_header_type definition for easy mapping between
154 * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
155 * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
157 enum flow_action_mangle_base {
158 FLOW_ACT_MANGLE_UNSPEC = 0,
159 FLOW_ACT_MANGLE_HDR_TYPE_ETH,
160 FLOW_ACT_MANGLE_HDR_TYPE_IP4,
161 FLOW_ACT_MANGLE_HDR_TYPE_IP6,
162 FLOW_ACT_MANGLE_HDR_TYPE_TCP,
163 FLOW_ACT_MANGLE_HDR_TYPE_UDP,
166 enum flow_action_hw_stats_bit {
167 FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
168 FLOW_ACTION_HW_STATS_DELAYED_BIT,
169 FLOW_ACTION_HW_STATS_DISABLED_BIT,
171 FLOW_ACTION_HW_STATS_NUM_BITS
174 enum flow_action_hw_stats {
175 FLOW_ACTION_HW_STATS_IMMEDIATE =
176 BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
177 FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
178 FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
179 FLOW_ACTION_HW_STATS_DELAYED,
180 FLOW_ACTION_HW_STATS_DISABLED =
181 BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
182 FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
185 typedef void (*action_destr)(void *priv);
187 struct flow_action_cookie {
192 struct flow_action_cookie *flow_action_cookie_create(void *data,
195 void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
197 struct flow_action_entry {
198 enum flow_action_id id;
199 enum flow_action_hw_stats hw_stats;
200 action_destr destructor;
201 void *destructor_priv;
203 u32 chain_index; /* FLOW_ACTION_GOTO */
204 struct net_device *dev; /* FLOW_ACTION_REDIRECT */
205 struct { /* FLOW_ACTION_VLAN */
210 struct { /* FLOW_ACTION_MANGLE */
211 /* FLOW_ACTION_ADD */
212 enum flow_action_mangle_base htype;
217 struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
218 u32 csum_flags; /* FLOW_ACTION_CSUM */
219 u32 mark; /* FLOW_ACTION_MARK */
220 u16 ptype; /* FLOW_ACTION_PTYPE */
221 u32 priority; /* FLOW_ACTION_PRIORITY */
222 struct { /* FLOW_ACTION_QUEUE */
227 struct { /* FLOW_ACTION_SAMPLE */
228 struct psample_group *psample_group;
233 struct { /* FLOW_ACTION_POLICE */
239 struct { /* FLOW_ACTION_CT */
242 struct nf_flowtable *flow_table;
245 unsigned long cookie;
250 struct { /* FLOW_ACTION_MPLS_PUSH */
257 struct { /* FLOW_ACTION_MPLS_POP */
260 struct { /* FLOW_ACTION_MPLS_MANGLE */
273 struct action_gate_entry *entries;
276 struct flow_action_cookie *cookie; /* user defined action cookie */
280 unsigned int num_entries;
281 struct flow_action_entry entries[];
284 static inline bool flow_action_has_entries(const struct flow_action *action)
286 return action->num_entries;
290 * flow_action_has_one_action() - check if exactly one action is present
291 * @action: tc filter flow offload action
293 * Returns true if exactly one action is present.
295 static inline bool flow_offload_has_one_action(const struct flow_action *action)
297 return action->num_entries == 1;
300 #define flow_action_for_each(__i, __act, __actions) \
301 for (__i = 0, __act = &(__actions)->entries[0]; \
302 __i < (__actions)->num_entries; \
303 __act = &(__actions)->entries[++__i])
306 flow_action_mixed_hw_stats_check(const struct flow_action *action,
307 struct netlink_ext_ack *extack)
309 const struct flow_action_entry *action_entry;
313 if (flow_offload_has_one_action(action))
316 flow_action_for_each(i, action_entry, action) {
317 if (i && action_entry->hw_stats != last_hw_stats) {
318 NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
321 last_hw_stats = action_entry->hw_stats;
326 static inline const struct flow_action_entry *
327 flow_action_first_entry_get(const struct flow_action *action)
329 WARN_ON(!flow_action_has_entries(action));
330 return &action->entries[0];
334 __flow_action_hw_stats_check(const struct flow_action *action,
335 struct netlink_ext_ack *extack,
336 bool check_allow_bit,
337 enum flow_action_hw_stats_bit allow_bit)
339 const struct flow_action_entry *action_entry;
341 if (!flow_action_has_entries(action))
343 if (!flow_action_mixed_hw_stats_check(action, extack))
346 action_entry = flow_action_first_entry_get(action);
348 /* Zero is not a legal value for hw_stats, catch anyone passing it */
349 WARN_ON_ONCE(!action_entry->hw_stats);
351 if (!check_allow_bit &&
352 ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
353 NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
355 } else if (check_allow_bit &&
356 !(action_entry->hw_stats & BIT(allow_bit))) {
357 NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
364 flow_action_hw_stats_check(const struct flow_action *action,
365 struct netlink_ext_ack *extack,
366 enum flow_action_hw_stats_bit allow_bit)
368 return __flow_action_hw_stats_check(action, extack, true, allow_bit);
372 flow_action_basic_hw_stats_check(const struct flow_action *action,
373 struct netlink_ext_ack *extack)
375 return __flow_action_hw_stats_check(action, extack, false, 0);
379 struct flow_match match;
380 struct flow_action action;
383 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
385 static inline bool flow_rule_match_key(const struct flow_rule *rule,
386 enum flow_dissector_key_id key)
388 return dissector_uses_key(rule->match.dissector, key);
396 enum flow_action_hw_stats used_hw_stats;
397 bool used_hw_stats_valid;
400 static inline void flow_stats_update(struct flow_stats *flow_stats,
402 u64 drops, u64 lastused,
403 enum flow_action_hw_stats used_hw_stats)
405 flow_stats->pkts += pkts;
406 flow_stats->bytes += bytes;
407 flow_stats->drops += drops;
408 flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused);
410 /* The driver should pass value with a maximum of one bit set.
411 * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
413 WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
414 flow_stats->used_hw_stats |= used_hw_stats;
415 flow_stats->used_hw_stats_valid = true;
418 enum flow_block_command {
423 enum flow_block_binder_type {
424 FLOW_BLOCK_BINDER_TYPE_UNSPEC,
425 FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
426 FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
427 FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
428 FLOW_BLOCK_BINDER_TYPE_RED_MARK,
432 struct list_head cb_list;
435 struct netlink_ext_ack;
437 struct flow_block_offload {
438 enum flow_block_command command;
439 enum flow_block_binder_type binder_type;
441 bool unlocked_driver_cb;
443 struct flow_block *block;
444 struct list_head cb_list;
445 struct list_head *driver_block_list;
446 struct netlink_ext_ack *extack;
451 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
454 struct flow_block_cb;
456 struct flow_block_indr {
457 struct list_head list;
458 struct net_device *dev;
460 enum flow_block_binder_type binder_type;
463 void (*cleanup)(struct flow_block_cb *block_cb);
466 struct flow_block_cb {
467 struct list_head driver_list;
468 struct list_head list;
472 void (*release)(void *cb_priv);
473 struct flow_block_indr indr;
477 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
478 void *cb_ident, void *cb_priv,
479 void (*release)(void *cb_priv));
480 struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
481 void *cb_ident, void *cb_priv,
482 void (*release)(void *cb_priv),
483 struct flow_block_offload *bo,
484 struct net_device *dev,
485 struct Qdisc *sch, void *data,
487 void (*cleanup)(struct flow_block_cb *block_cb));
488 void flow_block_cb_free(struct flow_block_cb *block_cb);
490 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
491 flow_setup_cb_t *cb, void *cb_ident);
493 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
494 void flow_block_cb_incref(struct flow_block_cb *block_cb);
495 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
497 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
498 struct flow_block_offload *offload)
500 list_add_tail(&block_cb->list, &offload->cb_list);
503 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
504 struct flow_block_offload *offload)
506 list_move(&block_cb->list, &offload->cb_list);
509 static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
510 struct flow_block_offload *offload)
512 list_del(&block_cb->indr.list);
513 list_move(&block_cb->list, &offload->cb_list);
516 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
517 struct list_head *driver_block_list);
519 int flow_block_cb_setup_simple(struct flow_block_offload *f,
520 struct list_head *driver_list,
522 void *cb_ident, void *cb_priv, bool ingress_only);
524 enum flow_cls_command {
528 FLOW_CLS_TMPLT_CREATE,
529 FLOW_CLS_TMPLT_DESTROY,
532 struct flow_cls_common_offload {
536 struct netlink_ext_ack *extack;
539 struct flow_cls_offload {
540 struct flow_cls_common_offload common;
541 enum flow_cls_command command;
542 unsigned long cookie;
543 struct flow_rule *rule;
544 struct flow_stats stats;
548 static inline struct flow_rule *
549 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
551 return flow_cmd->rule;
554 static inline void flow_block_init(struct flow_block *flow_block)
556 INIT_LIST_HEAD(&flow_block->cb_list);
559 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
560 enum tc_setup_type type, void *type_data,
562 void (*cleanup)(struct flow_block_cb *block_cb));
564 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
565 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
566 void (*release)(void *cb_priv));
567 int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
568 enum tc_setup_type type, void *data,
569 struct flow_block_offload *bo,
570 void (*cleanup)(struct flow_block_cb *block_cb));
572 #endif /* _NET_FLOW_OFFLOAD_H */