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_ipv4_addrs {
  36         struct flow_dissector_key_ipv4_addrs *key, *mask;
  37 };
  38
  39 struct flow_match_ipv6_addrs {
  40         struct flow_dissector_key_ipv6_addrs *key, *mask;
  41 };
  42
  43 struct flow_match_ip {
  44         struct flow_dissector_key_ip *key, *mask;
  45 };
  46
  47 struct flow_match_ports {
  48         struct flow_dissector_key_ports *key, *mask;
  49 };
  50
  51 struct flow_match_ports_range {
  52         struct flow_dissector_key_ports_range *key, *mask;
  53 };
  54
  55 struct flow_match_icmp {
  56         struct flow_dissector_key_icmp *key, *mask;
  57 };
  58
  59 struct flow_match_tcp {
  60         struct flow_dissector_key_tcp *key, *mask;
  61 };
  62
  63 struct flow_match_mpls {
  64         struct flow_dissector_key_mpls *key, *mask;
  65 };
  66
  67 struct flow_match_enc_keyid {
  68         struct flow_dissector_key_keyid *key, *mask;
  69 };
  70
  71 struct flow_match_enc_opts {
  72         struct flow_dissector_key_enc_opts *key, *mask;
  73 };
  74
  75 struct flow_match_ct {
  76         struct flow_dissector_key_ct *key, *mask;
  77 };
  78
  79 struct flow_match_pppoe {
  80         struct flow_dissector_key_pppoe *key, *mask;
  81 };
  82
  83 struct flow_rule;
  84
  85 void flow_rule_match_meta(const struct flow_rule *rule,
  86                           struct flow_match_meta *out);
  87 void flow_rule_match_basic(const struct flow_rule *rule,
  88                            struct flow_match_basic *out);
  89 void flow_rule_match_control(const struct flow_rule *rule,
  90                              struct flow_match_control *out);
  91 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
  92                                struct flow_match_eth_addrs *out);
  93 void flow_rule_match_vlan(const struct flow_rule *rule,
  94                           struct flow_match_vlan *out);
  95 void flow_rule_match_cvlan(const struct flow_rule *rule,
  96                            struct flow_match_vlan *out);
  97 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
  98                                 struct flow_match_ipv4_addrs *out);
  99 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
 100                                 struct flow_match_ipv6_addrs *out);
 101 void flow_rule_match_ip(const struct flow_rule *rule,
 102                         struct flow_match_ip *out);
 103 void flow_rule_match_ports(const struct flow_rule *rule,
 104                            struct flow_match_ports *out);
 105 void flow_rule_match_ports_range(const struct flow_rule *rule,
 106                                  struct flow_match_ports_range *out);
 107 void flow_rule_match_tcp(const struct flow_rule *rule,
 108                          struct flow_match_tcp *out);
 109 void flow_rule_match_icmp(const struct flow_rule *rule,
 110                           struct flow_match_icmp *out);
 111 void flow_rule_match_mpls(const struct flow_rule *rule,
 112                           struct flow_match_mpls *out);
 113 void flow_rule_match_enc_control(const struct flow_rule *rule,
 114                                  struct flow_match_control *out);
 115 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
 116                                     struct flow_match_ipv4_addrs *out);
 117 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
 118                                     struct flow_match_ipv6_addrs *out);
 119 void flow_rule_match_enc_ip(const struct flow_rule *rule,
 120                             struct flow_match_ip *out);
 121 void flow_rule_match_enc_ports(const struct flow_rule *rule,
 122                                struct flow_match_ports *out);
 123 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
 124                                struct flow_match_enc_keyid *out);
 125 void flow_rule_match_enc_opts(const struct flow_rule *rule,
 126                               struct flow_match_enc_opts *out);
 127 void flow_rule_match_ct(const struct flow_rule *rule,
 128                         struct flow_match_ct *out);
 129 void flow_rule_match_pppoe(const struct flow_rule *rule,
 130                            struct flow_match_pppoe *out);
 131
 132 enum flow_action_id {
 133         FLOW_ACTION_ACCEPT              = 0,
 134         FLOW_ACTION_DROP,
 135         FLOW_ACTION_TRAP,
 136         FLOW_ACTION_GOTO,
 137         FLOW_ACTION_REDIRECT,
 138         FLOW_ACTION_MIRRED,
 139         FLOW_ACTION_REDIRECT_INGRESS,
 140         FLOW_ACTION_MIRRED_INGRESS,
 141         FLOW_ACTION_VLAN_PUSH,
 142         FLOW_ACTION_VLAN_POP,
 143         FLOW_ACTION_VLAN_MANGLE,
 144         FLOW_ACTION_TUNNEL_ENCAP,
 145         FLOW_ACTION_TUNNEL_DECAP,
 146         FLOW_ACTION_MANGLE,
 147         FLOW_ACTION_ADD,
 148         FLOW_ACTION_CSUM,
 149         FLOW_ACTION_MARK,
 150         FLOW_ACTION_PTYPE,
 151         FLOW_ACTION_PRIORITY,
 152         FLOW_ACTION_WAKE,
 153         FLOW_ACTION_QUEUE,
 154         FLOW_ACTION_SAMPLE,
 155         FLOW_ACTION_POLICE,
 156         FLOW_ACTION_CT,
 157         FLOW_ACTION_CT_METADATA,
 158         FLOW_ACTION_MPLS_PUSH,
 159         FLOW_ACTION_MPLS_POP,
 160         FLOW_ACTION_MPLS_MANGLE,
 161         FLOW_ACTION_GATE,
 162         FLOW_ACTION_PPPOE_PUSH,
 163         FLOW_ACTION_JUMP,
 164         FLOW_ACTION_PIPE,
 165         FLOW_ACTION_VLAN_PUSH_ETH,
 166         FLOW_ACTION_VLAN_POP_ETH,
 167         FLOW_ACTION_CONTINUE,
 168         NUM_FLOW_ACTIONS,
 169 };
 170
 171 /* This is mirroring enum pedit_header_type definition for easy mapping between
 172  * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
 173  * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
 174  */
 175 enum flow_action_mangle_base {
 176         FLOW_ACT_MANGLE_UNSPEC          = 0,
 177         FLOW_ACT_MANGLE_HDR_TYPE_ETH,
 178         FLOW_ACT_MANGLE_HDR_TYPE_IP4,
 179         FLOW_ACT_MANGLE_HDR_TYPE_IP6,
 180         FLOW_ACT_MANGLE_HDR_TYPE_TCP,
 181         FLOW_ACT_MANGLE_HDR_TYPE_UDP,
 182 };
 183
 184 enum flow_action_hw_stats_bit {
 185         FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
 186         FLOW_ACTION_HW_STATS_DELAYED_BIT,
 187         FLOW_ACTION_HW_STATS_DISABLED_BIT,
 188
 189         FLOW_ACTION_HW_STATS_NUM_BITS
 190 };
 191
 192 enum flow_action_hw_stats {
 193         FLOW_ACTION_HW_STATS_IMMEDIATE =
 194                 BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
 195         FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
 196         FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
 197                                    FLOW_ACTION_HW_STATS_DELAYED,
 198         FLOW_ACTION_HW_STATS_DISABLED =
 199                 BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
 200         FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
 201 };
 202
 203 typedef void (*action_destr)(void *priv);
 204
 205 struct flow_action_cookie {
 206         u32 cookie_len;
 207         u8 cookie[];
 208 };
 209
 210 struct flow_action_cookie *flow_action_cookie_create(void *data,
 211                                                      unsigned int len,
 212                                                      gfp_t gfp);
 213 void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
 214
 215 struct flow_action_entry {
 216         enum flow_action_id             id;
 217         u32                             hw_index;
 218         enum flow_action_hw_stats       hw_stats;
 219         action_destr                    destructor;
 220         void                            *destructor_priv;
 221         union {
 222                 u32                     chain_index;    /* FLOW_ACTION_GOTO */
 223                 struct net_device       *dev;           /* FLOW_ACTION_REDIRECT */
 224                 struct {                                /* FLOW_ACTION_VLAN */
 225                         u16             vid;
 226                         __be16          proto;
 227                         u8              prio;
 228                 } vlan;
 229                 struct {                                /* FLOW_ACTION_VLAN_PUSH_ETH */
 230                         unsigned char dst[ETH_ALEN];
 231                         unsigned char src[ETH_ALEN];
 232                 } vlan_push_eth;
 233                 struct {                                /* FLOW_ACTION_MANGLE */
 234                                                         /* FLOW_ACTION_ADD */
 235                         enum flow_action_mangle_base htype;
 236                         u32             offset;
 237                         u32             mask;
 238                         u32             val;
 239                 } mangle;
 240                 struct ip_tunnel_info   *tunnel;        /* FLOW_ACTION_TUNNEL_ENCAP */
 241                 u32                     csum_flags;     /* FLOW_ACTION_CSUM */
 242                 u32                     mark;           /* FLOW_ACTION_MARK */
 243                 u16                     ptype;          /* FLOW_ACTION_PTYPE */
 244                 u32                     priority;       /* FLOW_ACTION_PRIORITY */
 245                 struct {                                /* FLOW_ACTION_QUEUE */
 246                         u32             ctx;
 247                         u32             index;
 248                         u8              vf;
 249                 } queue;
 250                 struct {                                /* FLOW_ACTION_SAMPLE */
 251                         struct psample_group    *psample_group;
 252                         u32                     rate;
 253                         u32                     trunc_size;
 254                         bool                    truncate;
 255                 } sample;
 256                 struct {                                /* FLOW_ACTION_POLICE */
 257                         u32                     burst;
 258                         u64                     rate_bytes_ps;
 259                         u64                     peakrate_bytes_ps;
 260                         u32                     avrate;
 261                         u16                     overhead;
 262                         u64                     burst_pkt;
 263                         u64                     rate_pkt_ps;
 264                         u32                     mtu;
 265                         struct {
 266                                 enum flow_action_id     act_id;
 267                                 u32                     extval;
 268                         } exceed, notexceed;
 269                 } police;
 270                 struct {                                /* FLOW_ACTION_CT */
 271                         int action;
 272                         u16 zone;
 273                         struct nf_flowtable *flow_table;
 274                 } ct;
 275                 struct {
 276                         unsigned long cookie;
 277                         u32 mark;
 278                         u32 labels[4];
 279                         bool orig_dir;
 280                 } ct_metadata;
 281                 struct {                                /* FLOW_ACTION_MPLS_PUSH */
 282                         u32             label;
 283                         __be16          proto;
 284                         u8              tc;
 285                         u8              bos;
 286                         u8              ttl;
 287                 } mpls_push;
 288                 struct {                                /* FLOW_ACTION_MPLS_POP */
 289                         __be16          proto;
 290                 } mpls_pop;
 291                 struct {                                /* FLOW_ACTION_MPLS_MANGLE */
 292                         u32             label;
 293                         u8              tc;
 294                         u8              bos;
 295                         u8              ttl;
 296                 } mpls_mangle;
 297                 struct {
 298                         s32             prio;
 299                         u64             basetime;
 300                         u64             cycletime;
 301                         u64             cycletimeext;
 302                         u32             num_entries;
 303                         struct action_gate_entry *entries;
 304                 } gate;
 305                 struct {                                /* FLOW_ACTION_PPPOE_PUSH */
 306                         u16             sid;
 307                 } pppoe;
 308         };
 309         struct flow_action_cookie *cookie; /* user defined action cookie */
 310 };
 311
 312 struct flow_action {
 313         unsigned int                    num_entries;
 314         struct flow_action_entry        entries[];
 315 };
 316
 317 static inline bool flow_action_has_entries(const struct flow_action *action)
 318 {
 319         return action->num_entries;
 320 }
 321
 322 /**
 323  * flow_offload_has_one_action() - check if exactly one action is present
 324  * @action: tc filter flow offload action
 325  *
 326  * Returns true if exactly one action is present.
 327  */
 328 static inline bool flow_offload_has_one_action(const struct flow_action *action)
 329 {
 330         return action->num_entries == 1;
 331 }
 332
 333 static inline bool flow_action_is_last_entry(const struct flow_action *action,
 334                                              const struct flow_action_entry *entry)
 335 {
 336         return entry == &action->entries[action->num_entries - 1];
 337 }
 338
 339 #define flow_action_for_each(__i, __act, __actions)                     \
 340         for (__i = 0, __act = &(__actions)->entries[0];                 \
 341              __i < (__actions)->num_entries;                            \
 342              __act = &(__actions)->entries[++__i])
 343
 344 static inline bool
 345 flow_action_mixed_hw_stats_check(const struct flow_action *action,
 346                                  struct netlink_ext_ack *extack)
 347 {
 348         const struct flow_action_entry *action_entry;
 349         u8 last_hw_stats;
 350         int i;
 351
 352         if (flow_offload_has_one_action(action))
 353                 return true;
 354
 355         flow_action_for_each(i, action_entry, action) {
 356                 if (i && action_entry->hw_stats != last_hw_stats) {
 357                         NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
 358                         return false;
 359                 }
 360                 last_hw_stats = action_entry->hw_stats;
 361         }
 362         return true;
 363 }
 364
 365 static inline const struct flow_action_entry *
 366 flow_action_first_entry_get(const struct flow_action *action)
 367 {
 368         WARN_ON(!flow_action_has_entries(action));
 369         return &action->entries[0];
 370 }
 371
 372 static inline bool
 373 __flow_action_hw_stats_check(const struct flow_action *action,
 374                              struct netlink_ext_ack *extack,
 375                              bool check_allow_bit,
 376                              enum flow_action_hw_stats_bit allow_bit)
 377 {
 378         const struct flow_action_entry *action_entry;
 379
 380         if (!flow_action_has_entries(action))
 381                 return true;
 382         if (!flow_action_mixed_hw_stats_check(action, extack))
 383                 return false;
 384
 385         action_entry = flow_action_first_entry_get(action);
 386
 387         /* Zero is not a legal value for hw_stats, catch anyone passing it */
 388         WARN_ON_ONCE(!action_entry->hw_stats);
 389
 390         if (!check_allow_bit &&
 391             ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
 392                 NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
 393                 return false;
 394         } else if (check_allow_bit &&
 395                    !(action_entry->hw_stats & BIT(allow_bit))) {
 396                 NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
 397                 return false;
 398         }
 399         return true;
 400 }
 401
 402 static inline bool
 403 flow_action_hw_stats_check(const struct flow_action *action,
 404                            struct netlink_ext_ack *extack,
 405                            enum flow_action_hw_stats_bit allow_bit)
 406 {
 407         return __flow_action_hw_stats_check(action, extack, true, allow_bit);
 408 }
 409
 410 static inline bool
 411 flow_action_basic_hw_stats_check(const struct flow_action *action,
 412                                  struct netlink_ext_ack *extack)
 413 {
 414         return __flow_action_hw_stats_check(action, extack, false, 0);
 415 }
 416
 417 struct flow_rule {
 418         struct flow_match       match;
 419         struct flow_action      action;
 420 };
 421
 422 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
 423
 424 static inline bool flow_rule_match_key(const struct flow_rule *rule,
 425                                        enum flow_dissector_key_id key)
 426 {
 427         return dissector_uses_key(rule->match.dissector, key);
 428 }
 429
 430 struct flow_stats {
 431         u64     pkts;
 432         u64     bytes;
 433         u64     drops;
 434         u64     lastused;
 435         enum flow_action_hw_stats used_hw_stats;
 436         bool used_hw_stats_valid;
 437 };
 438
 439 static inline void flow_stats_update(struct flow_stats *flow_stats,
 440                                      u64 bytes, u64 pkts,
 441                                      u64 drops, u64 lastused,
 442                                      enum flow_action_hw_stats used_hw_stats)
 443 {
 444         flow_stats->pkts        += pkts;
 445         flow_stats->bytes       += bytes;
 446         flow_stats->drops       += drops;
 447         flow_stats->lastused    = max_t(u64, flow_stats->lastused, lastused);
 448
 449         /* The driver should pass value with a maximum of one bit set.
 450          * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
 451          */
 452         WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
 453         flow_stats->used_hw_stats |= used_hw_stats;
 454         flow_stats->used_hw_stats_valid = true;
 455 }
 456
 457 enum flow_block_command {
 458         FLOW_BLOCK_BIND,
 459         FLOW_BLOCK_UNBIND,
 460 };
 461
 462 enum flow_block_binder_type {
 463         FLOW_BLOCK_BINDER_TYPE_UNSPEC,
 464         FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
 465         FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
 466         FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
 467         FLOW_BLOCK_BINDER_TYPE_RED_MARK,
 468 };
 469
 470 struct flow_block {
 471         struct list_head cb_list;
 472 };
 473
 474 struct netlink_ext_ack;
 475
 476 struct flow_block_offload {
 477         enum flow_block_command command;
 478         enum flow_block_binder_type binder_type;
 479         bool block_shared;
 480         bool unlocked_driver_cb;
 481         struct net *net;
 482         struct flow_block *block;
 483         struct list_head cb_list;
 484         struct list_head *driver_block_list;
 485         struct netlink_ext_ack *extack;
 486         struct Qdisc *sch;
 487         struct list_head *cb_list_head;
 488 };
 489
 490 enum tc_setup_type;
 491 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
 492                             void *cb_priv);
 493
 494 struct flow_block_cb;
 495
 496 struct flow_block_indr {
 497         struct list_head                list;
 498         struct net_device               *dev;
 499         struct Qdisc                    *sch;
 500         enum flow_block_binder_type     binder_type;
 501         void                            *data;
 502         void                            *cb_priv;
 503         void                            (*cleanup)(struct flow_block_cb *block_cb);
 504 };
 505
 506 struct flow_block_cb {
 507         struct list_head        driver_list;
 508         struct list_head        list;
 509         flow_setup_cb_t         *cb;
 510         void                    *cb_ident;
 511         void                    *cb_priv;
 512         void                    (*release)(void *cb_priv);
 513         struct flow_block_indr  indr;
 514         unsigned int            refcnt;
 515 };
 516
 517 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
 518                                           void *cb_ident, void *cb_priv,
 519                                           void (*release)(void *cb_priv));
 520 struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
 521                                                void *cb_ident, void *cb_priv,
 522                                                void (*release)(void *cb_priv),
 523                                                struct flow_block_offload *bo,
 524                                                struct net_device *dev,
 525                                                struct Qdisc *sch, void *data,
 526                                                void *indr_cb_priv,
 527                                                void (*cleanup)(struct flow_block_cb *block_cb));
 528 void flow_block_cb_free(struct flow_block_cb *block_cb);
 529
 530 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
 531                                            flow_setup_cb_t *cb, void *cb_ident);
 532
 533 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
 534 void flow_block_cb_incref(struct flow_block_cb *block_cb);
 535 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
 536
 537 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
 538                                      struct flow_block_offload *offload)
 539 {
 540         list_add_tail(&block_cb->list, &offload->cb_list);
 541 }
 542
 543 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
 544                                         struct flow_block_offload *offload)
 545 {
 546         list_move(&block_cb->list, &offload->cb_list);
 547 }
 548
 549 static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
 550                                              struct flow_block_offload *offload)
 551 {
 552         list_del(&block_cb->indr.list);
 553         list_move(&block_cb->list, &offload->cb_list);
 554 }
 555
 556 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
 557                            struct list_head *driver_block_list);
 558
 559 int flow_block_cb_setup_simple(struct flow_block_offload *f,
 560                                struct list_head *driver_list,
 561                                flow_setup_cb_t *cb,
 562                                void *cb_ident, void *cb_priv, bool ingress_only);
 563
 564 enum flow_cls_command {
 565         FLOW_CLS_REPLACE,
 566         FLOW_CLS_DESTROY,
 567         FLOW_CLS_STATS,
 568         FLOW_CLS_TMPLT_CREATE,
 569         FLOW_CLS_TMPLT_DESTROY,
 570 };
 571
 572 struct flow_cls_common_offload {
 573         u32 chain_index;
 574         __be16 protocol;
 575         u32 prio;
 576         struct netlink_ext_ack *extack;
 577 };
 578
 579 struct flow_cls_offload {
 580         struct flow_cls_common_offload common;
 581         enum flow_cls_command command;
 582         unsigned long cookie;
 583         struct flow_rule *rule;
 584         struct flow_stats stats;
 585         u32 classid;
 586 };
 587
 588 enum offload_act_command  {
 589         FLOW_ACT_REPLACE,
 590         FLOW_ACT_DESTROY,
 591         FLOW_ACT_STATS,
 592 };
 593
 594 struct flow_offload_action {
 595         struct netlink_ext_ack *extack; /* NULL in FLOW_ACT_STATS process*/
 596         enum offload_act_command  command;
 597         enum flow_action_id id;
 598         u32 index;
 599         struct flow_stats stats;
 600         struct flow_action action;
 601 };
 602
 603 struct flow_offload_action *offload_action_alloc(unsigned int num_actions);
 604
 605 static inline struct flow_rule *
 606 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
 607 {
 608         return flow_cmd->rule;
 609 }
 610
 611 static inline void flow_block_init(struct flow_block *flow_block)
 612 {
 613         INIT_LIST_HEAD(&flow_block->cb_list);
 614 }
 615
 616 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
 617                                       enum tc_setup_type type, void *type_data,
 618                                       void *data,
 619                                       void (*cleanup)(struct flow_block_cb *block_cb));
 620
 621 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
 622 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
 623                               void (*release)(void *cb_priv));
 624 int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
 625                                 enum tc_setup_type type, void *data,
 626                                 struct flow_block_offload *bo,
 627                                 void (*cleanup)(struct flow_block_cb *block_cb));
 628 bool flow_indr_dev_exists(void);
 629
 630 #endif /* _NET_FLOW_OFFLOAD_H */