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>
8 #include <linux/rhashtable.h>
11 struct flow_dissector *dissector;
16 struct flow_match_meta {
17 struct flow_dissector_key_meta *key, *mask;
20 struct flow_match_basic {
21 struct flow_dissector_key_basic *key, *mask;
24 struct flow_match_control {
25 struct flow_dissector_key_control *key, *mask;
28 struct flow_match_eth_addrs {
29 struct flow_dissector_key_eth_addrs *key, *mask;
32 struct flow_match_vlan {
33 struct flow_dissector_key_vlan *key, *mask;
36 struct flow_match_ipv4_addrs {
37 struct flow_dissector_key_ipv4_addrs *key, *mask;
40 struct flow_match_ipv6_addrs {
41 struct flow_dissector_key_ipv6_addrs *key, *mask;
44 struct flow_match_ip {
45 struct flow_dissector_key_ip *key, *mask;
48 struct flow_match_ports {
49 struct flow_dissector_key_ports *key, *mask;
52 struct flow_match_icmp {
53 struct flow_dissector_key_icmp *key, *mask;
56 struct flow_match_tcp {
57 struct flow_dissector_key_tcp *key, *mask;
60 struct flow_match_mpls {
61 struct flow_dissector_key_mpls *key, *mask;
64 struct flow_match_enc_keyid {
65 struct flow_dissector_key_keyid *key, *mask;
68 struct flow_match_enc_opts {
69 struct flow_dissector_key_enc_opts *key, *mask;
72 struct flow_match_ct {
73 struct flow_dissector_key_ct *key, *mask;
78 void flow_rule_match_meta(const struct flow_rule *rule,
79 struct flow_match_meta *out);
80 void flow_rule_match_basic(const struct flow_rule *rule,
81 struct flow_match_basic *out);
82 void flow_rule_match_control(const struct flow_rule *rule,
83 struct flow_match_control *out);
84 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
85 struct flow_match_eth_addrs *out);
86 void flow_rule_match_vlan(const struct flow_rule *rule,
87 struct flow_match_vlan *out);
88 void flow_rule_match_cvlan(const struct flow_rule *rule,
89 struct flow_match_vlan *out);
90 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
91 struct flow_match_ipv4_addrs *out);
92 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
93 struct flow_match_ipv6_addrs *out);
94 void flow_rule_match_ip(const struct flow_rule *rule,
95 struct flow_match_ip *out);
96 void flow_rule_match_ports(const struct flow_rule *rule,
97 struct flow_match_ports *out);
98 void flow_rule_match_tcp(const struct flow_rule *rule,
99 struct flow_match_tcp *out);
100 void flow_rule_match_icmp(const struct flow_rule *rule,
101 struct flow_match_icmp *out);
102 void flow_rule_match_mpls(const struct flow_rule *rule,
103 struct flow_match_mpls *out);
104 void flow_rule_match_enc_control(const struct flow_rule *rule,
105 struct flow_match_control *out);
106 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
107 struct flow_match_ipv4_addrs *out);
108 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
109 struct flow_match_ipv6_addrs *out);
110 void flow_rule_match_enc_ip(const struct flow_rule *rule,
111 struct flow_match_ip *out);
112 void flow_rule_match_enc_ports(const struct flow_rule *rule,
113 struct flow_match_ports *out);
114 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
115 struct flow_match_enc_keyid *out);
116 void flow_rule_match_enc_opts(const struct flow_rule *rule,
117 struct flow_match_enc_opts *out);
118 void flow_rule_match_ct(const struct flow_rule *rule,
119 struct flow_match_ct *out);
121 enum flow_action_id {
122 FLOW_ACTION_ACCEPT = 0,
126 FLOW_ACTION_REDIRECT,
128 FLOW_ACTION_REDIRECT_INGRESS,
129 FLOW_ACTION_MIRRED_INGRESS,
130 FLOW_ACTION_VLAN_PUSH,
131 FLOW_ACTION_VLAN_POP,
132 FLOW_ACTION_VLAN_MANGLE,
133 FLOW_ACTION_TUNNEL_ENCAP,
134 FLOW_ACTION_TUNNEL_DECAP,
140 FLOW_ACTION_PRIORITY,
146 FLOW_ACTION_CT_METADATA,
147 FLOW_ACTION_MPLS_PUSH,
148 FLOW_ACTION_MPLS_POP,
149 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,
172 enum flow_action_hw_stats {
173 FLOW_ACTION_HW_STATS_DONT_CARE = 0,
174 FLOW_ACTION_HW_STATS_IMMEDIATE =
175 BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
176 FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
177 FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
178 FLOW_ACTION_HW_STATS_DELAYED,
179 FLOW_ACTION_HW_STATS_DISABLED =
180 BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
183 typedef void (*action_destr)(void *priv);
185 struct flow_action_cookie {
190 struct flow_action_cookie *flow_action_cookie_create(void *data,
193 void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
195 struct flow_action_entry {
196 enum flow_action_id id;
197 enum flow_action_hw_stats hw_stats;
198 action_destr destructor;
199 void *destructor_priv;
201 u32 chain_index; /* FLOW_ACTION_GOTO */
202 struct net_device *dev; /* FLOW_ACTION_REDIRECT */
203 struct { /* FLOW_ACTION_VLAN */
208 struct { /* FLOW_ACTION_MANGLE */
209 /* FLOW_ACTION_ADD */
210 enum flow_action_mangle_base htype;
215 struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
216 u32 csum_flags; /* FLOW_ACTION_CSUM */
217 u32 mark; /* FLOW_ACTION_MARK */
218 u16 ptype; /* FLOW_ACTION_PTYPE */
219 u32 priority; /* FLOW_ACTION_PRIORITY */
220 struct { /* FLOW_ACTION_QUEUE */
225 struct { /* FLOW_ACTION_SAMPLE */
226 struct psample_group *psample_group;
231 struct { /* FLOW_ACTION_POLICE */
235 struct { /* FLOW_ACTION_CT */
238 struct nf_flowtable *flow_table;
241 unsigned long cookie;
245 struct { /* FLOW_ACTION_MPLS_PUSH */
252 struct { /* FLOW_ACTION_MPLS_POP */
255 struct { /* FLOW_ACTION_MPLS_MANGLE */
262 struct flow_action_cookie *cookie; /* user defined action cookie */
266 unsigned int num_entries;
267 struct flow_action_entry entries[];
270 static inline bool flow_action_has_entries(const struct flow_action *action)
272 return action->num_entries;
276 * flow_action_has_one_action() - check if exactly one action is present
277 * @action: tc filter flow offload action
279 * Returns true if exactly one action is present.
281 static inline bool flow_offload_has_one_action(const struct flow_action *action)
283 return action->num_entries == 1;
286 #define flow_action_for_each(__i, __act, __actions) \
287 for (__i = 0, __act = &(__actions)->entries[0]; \
288 __i < (__actions)->num_entries; \
289 __act = &(__actions)->entries[++__i])
292 flow_action_mixed_hw_stats_check(const struct flow_action *action,
293 struct netlink_ext_ack *extack)
295 const struct flow_action_entry *action_entry;
296 u8 uninitialized_var(last_hw_stats);
299 if (flow_offload_has_one_action(action))
302 flow_action_for_each(i, action_entry, action) {
303 if (i && action_entry->hw_stats != last_hw_stats) {
304 NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
307 last_hw_stats = action_entry->hw_stats;
312 static inline const struct flow_action_entry *
313 flow_action_first_entry_get(const struct flow_action *action)
315 WARN_ON(!flow_action_has_entries(action));
316 return &action->entries[0];
320 __flow_action_hw_stats_check(const struct flow_action *action,
321 struct netlink_ext_ack *extack,
322 bool check_allow_bit,
323 enum flow_action_hw_stats_bit allow_bit)
325 const struct flow_action_entry *action_entry;
327 if (!flow_action_has_entries(action))
329 if (!flow_action_mixed_hw_stats_check(action, extack))
332 action_entry = flow_action_first_entry_get(action);
333 if (action_entry->hw_stats == FLOW_ACTION_HW_STATS_DONT_CARE)
336 if (!check_allow_bit &&
337 action_entry->hw_stats != FLOW_ACTION_HW_STATS_ANY) {
338 NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
340 } else if (check_allow_bit &&
341 !(action_entry->hw_stats & BIT(allow_bit))) {
342 NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
349 flow_action_hw_stats_check(const struct flow_action *action,
350 struct netlink_ext_ack *extack,
351 enum flow_action_hw_stats_bit allow_bit)
353 return __flow_action_hw_stats_check(action, extack, true, allow_bit);
357 flow_action_basic_hw_stats_check(const struct flow_action *action,
358 struct netlink_ext_ack *extack)
360 return __flow_action_hw_stats_check(action, extack, false, 0);
364 struct flow_match match;
365 struct flow_action action;
368 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
370 static inline bool flow_rule_match_key(const struct flow_rule *rule,
371 enum flow_dissector_key_id key)
373 return dissector_uses_key(rule->match.dissector, key);
380 enum flow_action_hw_stats used_hw_stats;
381 bool used_hw_stats_valid;
384 static inline void flow_stats_update(struct flow_stats *flow_stats,
385 u64 bytes, u64 pkts, u64 lastused,
386 enum flow_action_hw_stats used_hw_stats)
388 flow_stats->pkts += pkts;
389 flow_stats->bytes += bytes;
390 flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused);
392 /* The driver should pass value with a maximum of one bit set.
393 * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
395 WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
396 flow_stats->used_hw_stats |= used_hw_stats;
397 flow_stats->used_hw_stats_valid = true;
400 enum flow_block_command {
405 enum flow_block_binder_type {
406 FLOW_BLOCK_BINDER_TYPE_UNSPEC,
407 FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
408 FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
412 struct list_head cb_list;
415 struct netlink_ext_ack;
417 struct flow_block_offload {
418 enum flow_block_command command;
419 enum flow_block_binder_type binder_type;
421 bool unlocked_driver_cb;
423 struct flow_block *block;
424 struct list_head cb_list;
425 struct list_head *driver_block_list;
426 struct netlink_ext_ack *extack;
430 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
433 struct flow_block_cb {
434 struct list_head driver_list;
435 struct list_head list;
439 void (*release)(void *cb_priv);
443 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
444 void *cb_ident, void *cb_priv,
445 void (*release)(void *cb_priv));
446 void flow_block_cb_free(struct flow_block_cb *block_cb);
448 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
449 flow_setup_cb_t *cb, void *cb_ident);
451 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
452 void flow_block_cb_incref(struct flow_block_cb *block_cb);
453 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
455 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
456 struct flow_block_offload *offload)
458 list_add_tail(&block_cb->list, &offload->cb_list);
461 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
462 struct flow_block_offload *offload)
464 list_move(&block_cb->list, &offload->cb_list);
467 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
468 struct list_head *driver_block_list);
470 int flow_block_cb_setup_simple(struct flow_block_offload *f,
471 struct list_head *driver_list,
473 void *cb_ident, void *cb_priv, bool ingress_only);
475 enum flow_cls_command {
479 FLOW_CLS_TMPLT_CREATE,
480 FLOW_CLS_TMPLT_DESTROY,
483 struct flow_cls_common_offload {
487 struct netlink_ext_ack *extack;
490 struct flow_cls_offload {
491 struct flow_cls_common_offload common;
492 enum flow_cls_command command;
493 unsigned long cookie;
494 struct flow_rule *rule;
495 struct flow_stats stats;
499 static inline struct flow_rule *
500 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
502 return flow_cmd->rule;
505 static inline void flow_block_init(struct flow_block *flow_block)
507 INIT_LIST_HEAD(&flow_block->cb_list);
510 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv,
511 enum tc_setup_type type, void *type_data);
513 typedef void flow_indr_block_cmd_t(struct net_device *dev,
514 flow_indr_block_bind_cb_t *cb, void *cb_priv,
515 enum flow_block_command command);
517 struct flow_indr_block_entry {
518 flow_indr_block_cmd_t *cb;
519 struct list_head list;
522 void flow_indr_add_block_cb(struct flow_indr_block_entry *entry);
524 void flow_indr_del_block_cb(struct flow_indr_block_entry *entry);
526 int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
527 flow_indr_block_bind_cb_t *cb,
530 void __flow_indr_block_cb_unregister(struct net_device *dev,
531 flow_indr_block_bind_cb_t *cb,
534 int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
535 flow_indr_block_bind_cb_t *cb, void *cb_ident);
537 void flow_indr_block_cb_unregister(struct net_device *dev,
538 flow_indr_block_bind_cb_t *cb,
541 void flow_indr_block_call(struct net_device *dev,
542 struct flow_block_offload *bo,
543 enum flow_block_command command,
544 enum tc_setup_type type);
546 #endif /* _NET_FLOW_OFFLOAD_H */