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