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_ipsec {
  68         struct flow_dissector_key_ipsec *key, *mask;
  69 };
  70
  71 struct flow_match_mpls {
  72         struct flow_dissector_key_mpls *key, *mask;
  73 };
  74
  75 struct flow_match_enc_keyid {
  76         struct flow_dissector_key_keyid *key, *mask;
  77 };
  78
  79 struct flow_match_enc_opts {
  80         struct flow_dissector_key_enc_opts *key, *mask;
  81 };
  82
  83 struct flow_match_ct {
  84         struct flow_dissector_key_ct *key, *mask;
  85 };
  86
  87 struct flow_match_pppoe {
  88         struct flow_dissector_key_pppoe *key, *mask;
  89 };
  90
  91 struct flow_match_l2tpv3 {
  92         struct flow_dissector_key_l2tpv3 *key, *mask;
  93 };
  94
  95 struct flow_rule;
  96
  97 void flow_rule_match_meta(const struct flow_rule *rule,
  98                           struct flow_match_meta *out);
  99 void flow_rule_match_basic(const struct flow_rule *rule,
 100                            struct flow_match_basic *out);
 101 void flow_rule_match_control(const struct flow_rule *rule,
 102                              struct flow_match_control *out);
 103 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
 104                                struct flow_match_eth_addrs *out);
 105 void flow_rule_match_vlan(const struct flow_rule *rule,
 106                           struct flow_match_vlan *out);
 107 void flow_rule_match_cvlan(const struct flow_rule *rule,
 108                            struct flow_match_vlan *out);
 109 void flow_rule_match_arp(const struct flow_rule *rule,
 110                          struct flow_match_arp *out);
 111 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
 112                                 struct flow_match_ipv4_addrs *out);
 113 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
 114                                 struct flow_match_ipv6_addrs *out);
 115 void flow_rule_match_ip(const struct flow_rule *rule,
 116                         struct flow_match_ip *out);
 117 void flow_rule_match_ports(const struct flow_rule *rule,
 118                            struct flow_match_ports *out);
 119 void flow_rule_match_ports_range(const struct flow_rule *rule,
 120                                  struct flow_match_ports_range *out);
 121 void flow_rule_match_tcp(const struct flow_rule *rule,
 122                          struct flow_match_tcp *out);
 123 void flow_rule_match_ipsec(const struct flow_rule *rule,
 124                            struct flow_match_ipsec *out);
 125 void flow_rule_match_icmp(const struct flow_rule *rule,
 126                           struct flow_match_icmp *out);
 127 void flow_rule_match_mpls(const struct flow_rule *rule,
 128                           struct flow_match_mpls *out);
 129 void flow_rule_match_enc_control(const struct flow_rule *rule,
 130                                  struct flow_match_control *out);
 131 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
 132                                     struct flow_match_ipv4_addrs *out);
 133 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
 134                                     struct flow_match_ipv6_addrs *out);
 135 void flow_rule_match_enc_ip(const struct flow_rule *rule,
 136                             struct flow_match_ip *out);
 137 void flow_rule_match_enc_ports(const struct flow_rule *rule,
 138                                struct flow_match_ports *out);
 139 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
 140                                struct flow_match_enc_keyid *out);
 141 void flow_rule_match_enc_opts(const struct flow_rule *rule,
 142                               struct flow_match_enc_opts *out);
 143 void flow_rule_match_ct(const struct flow_rule *rule,
 144                         struct flow_match_ct *out);
 145 void flow_rule_match_pppoe(const struct flow_rule *rule,
 146                            struct flow_match_pppoe *out);
 147 void flow_rule_match_l2tpv3(const struct flow_rule *rule,
 148                             struct flow_match_l2tpv3 *out);
 149
 150 enum 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  */
 194 enum 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
 203 enum 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
 211 enum 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
 222 typedef void (*action_destr)(void *priv);
 223
 224 struct flow_action_cookie {
 225         u32 cookie_len;
 226         u8 cookie[];
 227 };
 228
 229 struct flow_action_cookie *flow_action_cookie_create(void *data,
 230                                                      unsigned int len,
 231                                                      gfp_t gfp);
 232 void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
 233
 234 struct 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
 334 struct flow_action {
 335         unsigned int                    num_entries;
 336         struct flow_action_entry        entries[] __counted_by(num_entries);
 337 };
 338
 339 static 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  * Return: true if exactly one action is present.
 349  */
 350 static inline bool flow_offload_has_one_action(const struct flow_action *action)
 351 {
 352         return action->num_entries == 1;
 353 }
 354
 355 static 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
 366 static inline bool
 367 flow_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
 387 static inline const struct flow_action_entry *
 388 flow_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
 394 static 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
 424 static inline bool
 425 flow_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
 432 static inline bool
 433 flow_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
 439 struct flow_rule {
 440         struct flow_match       match;
 441         struct flow_action      action;
 442 };
 443
 444 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
 445
 446 static 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
 452 /**
 453  * flow_rule_is_supp_control_flags() - check for supported control flags
 454  * @supp_flags: control flags supported by driver
 455  * @ctrl_flags: control flags present in rule
 456  * @extack: The netlink extended ACK for reporting errors.
 457  *
 458  * Return: true if only supported control flags are set, false otherwise.
 459  */
 460 static inline bool flow_rule_is_supp_control_flags(const u32 supp_flags,
 461                                                    const u32 ctrl_flags,
 462                                                    struct netlink_ext_ack *extack)
 463 {
 464         if (likely((ctrl_flags & ~supp_flags) == 0))
 465                 return true;
 466
 467         NL_SET_ERR_MSG_FMT_MOD(extack,
 468                                "Unsupported match on control.flags %#x",
 469                                ctrl_flags);
 470
 471         return false;
 472 }
 473
 474 /**
 475  * flow_rule_is_supp_enc_control_flags() - check for supported control flags
 476  * @supp_enc_flags: encapsulation control flags supported by driver
 477  * @enc_ctrl_flags: encapsulation control flags present in rule
 478  * @extack: The netlink extended ACK for reporting errors.
 479  *
 480  * Return: true if only supported control flags are set, false otherwise.
 481  */
 482 static inline bool flow_rule_is_supp_enc_control_flags(const u32 supp_enc_flags,
 483                                                        const u32 enc_ctrl_flags,
 484                                                        struct netlink_ext_ack *extack)
 485 {
 486         if (likely((enc_ctrl_flags & ~supp_enc_flags) == 0))
 487                 return true;
 488
 489         NL_SET_ERR_MSG_FMT_MOD(extack,
 490                                "Unsupported match on enc_control.flags %#x",
 491                                enc_ctrl_flags);
 492
 493         return false;
 494 }
 495
 496 /**
 497  * flow_rule_has_control_flags() - check for presence of any control flags
 498  * @ctrl_flags: control flags present in rule
 499  * @extack: The netlink extended ACK for reporting errors.
 500  *
 501  * Return: true if control flags are set, false otherwise.
 502  */
 503 static inline bool flow_rule_has_control_flags(const u32 ctrl_flags,
 504                                                struct netlink_ext_ack *extack)
 505 {
 506         return !flow_rule_is_supp_control_flags(0, ctrl_flags, extack);
 507 }
 508
 509 /**
 510  * flow_rule_has_enc_control_flags() - check for presence of any control flags
 511  * @enc_ctrl_flags: encapsulation control flags present in rule
 512  * @extack: The netlink extended ACK for reporting errors.
 513  *
 514  * Return: true if control flags are set, false otherwise.
 515  */
 516 static inline bool flow_rule_has_enc_control_flags(const u32 enc_ctrl_flags,
 517                                                    struct netlink_ext_ack *extack)
 518 {
 519         return !flow_rule_is_supp_enc_control_flags(0, enc_ctrl_flags, extack);
 520 }
 521
 522 /**
 523  * flow_rule_match_has_control_flags() - match and check for any control flags
 524  * @rule: The flow_rule under evaluation.
 525  * @extack: The netlink extended ACK for reporting errors.
 526  *
 527  * Return: true if control flags are set, false otherwise.
 528  */
 529 static inline bool flow_rule_match_has_control_flags(struct flow_rule *rule,
 530                                                      struct netlink_ext_ack *extack)
 531 {
 532         struct flow_match_control match;
 533
 534         if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL))
 535                 return false;
 536
 537         flow_rule_match_control(rule, &match);
 538
 539         return flow_rule_has_control_flags(match.mask->flags, extack);
 540 }
 541
 542 struct flow_stats {
 543         u64     pkts;
 544         u64     bytes;
 545         u64     drops;
 546         u64     lastused;
 547         enum flow_action_hw_stats used_hw_stats;
 548         bool used_hw_stats_valid;
 549 };
 550
 551 static inline void flow_stats_update(struct flow_stats *flow_stats,
 552                                      u64 bytes, u64 pkts,
 553                                      u64 drops, u64 lastused,
 554                                      enum flow_action_hw_stats used_hw_stats)
 555 {
 556         flow_stats->pkts        += pkts;
 557         flow_stats->bytes       += bytes;
 558         flow_stats->drops       += drops;
 559         flow_stats->lastused    = max_t(u64, flow_stats->lastused, lastused);
 560
 561         /* The driver should pass value with a maximum of one bit set.
 562          * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
 563          */
 564         WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
 565         flow_stats->used_hw_stats |= used_hw_stats;
 566         flow_stats->used_hw_stats_valid = true;
 567 }
 568
 569 enum flow_block_command {
 570         FLOW_BLOCK_BIND,
 571         FLOW_BLOCK_UNBIND,
 572 };
 573
 574 enum flow_block_binder_type {
 575         FLOW_BLOCK_BINDER_TYPE_UNSPEC,
 576         FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
 577         FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
 578         FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
 579         FLOW_BLOCK_BINDER_TYPE_RED_MARK,
 580 };
 581
 582 struct flow_block {
 583         struct list_head cb_list;
 584 };
 585
 586 struct netlink_ext_ack;
 587
 588 struct flow_block_offload {
 589         enum flow_block_command command;
 590         enum flow_block_binder_type binder_type;
 591         bool block_shared;
 592         bool unlocked_driver_cb;
 593         struct net *net;
 594         struct flow_block *block;
 595         struct list_head cb_list;
 596         struct list_head *driver_block_list;
 597         struct netlink_ext_ack *extack;
 598         struct Qdisc *sch;
 599         struct list_head *cb_list_head;
 600 };
 601
 602 enum tc_setup_type;
 603 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
 604                             void *cb_priv);
 605
 606 struct flow_block_cb;
 607
 608 struct flow_block_indr {
 609         struct list_head                list;
 610         struct net_device               *dev;
 611         struct Qdisc                    *sch;
 612         enum flow_block_binder_type     binder_type;
 613         void                            *data;
 614         void                            *cb_priv;
 615         void                            (*cleanup)(struct flow_block_cb *block_cb);
 616 };
 617
 618 struct flow_block_cb {
 619         struct list_head        driver_list;
 620         struct list_head        list;
 621         flow_setup_cb_t         *cb;
 622         void                    *cb_ident;
 623         void                    *cb_priv;
 624         void                    (*release)(void *cb_priv);
 625         struct flow_block_indr  indr;
 626         unsigned int            refcnt;
 627 };
 628
 629 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
 630                                           void *cb_ident, void *cb_priv,
 631                                           void (*release)(void *cb_priv));
 632 struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
 633                                                void *cb_ident, void *cb_priv,
 634                                                void (*release)(void *cb_priv),
 635                                                struct flow_block_offload *bo,
 636                                                struct net_device *dev,
 637                                                struct Qdisc *sch, void *data,
 638                                                void *indr_cb_priv,
 639                                                void (*cleanup)(struct flow_block_cb *block_cb));
 640 void flow_block_cb_free(struct flow_block_cb *block_cb);
 641
 642 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
 643                                            flow_setup_cb_t *cb, void *cb_ident);
 644
 645 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
 646 void flow_block_cb_incref(struct flow_block_cb *block_cb);
 647 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
 648
 649 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
 650                                      struct flow_block_offload *offload)
 651 {
 652         list_add_tail(&block_cb->list, &offload->cb_list);
 653 }
 654
 655 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
 656                                         struct flow_block_offload *offload)
 657 {
 658         list_move(&block_cb->list, &offload->cb_list);
 659 }
 660
 661 static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
 662                                              struct flow_block_offload *offload)
 663 {
 664         list_del(&block_cb->indr.list);
 665         list_move(&block_cb->list, &offload->cb_list);
 666 }
 667
 668 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
 669                            struct list_head *driver_block_list);
 670
 671 int flow_block_cb_setup_simple(struct flow_block_offload *f,
 672                                struct list_head *driver_list,
 673                                flow_setup_cb_t *cb,
 674                                void *cb_ident, void *cb_priv, bool ingress_only);
 675
 676 enum flow_cls_command {
 677         FLOW_CLS_REPLACE,
 678         FLOW_CLS_DESTROY,
 679         FLOW_CLS_STATS,
 680         FLOW_CLS_TMPLT_CREATE,
 681         FLOW_CLS_TMPLT_DESTROY,
 682 };
 683
 684 struct flow_cls_common_offload {
 685         u32 chain_index;
 686         __be16 protocol;
 687         u32 prio;
 688         bool skip_sw;
 689         struct netlink_ext_ack *extack;
 690 };
 691
 692 struct flow_cls_offload {
 693         struct flow_cls_common_offload common;
 694         enum flow_cls_command command;
 695         bool use_act_stats;
 696         unsigned long cookie;
 697         struct flow_rule *rule;
 698         struct flow_stats stats;
 699         u32 classid;
 700 };
 701
 702 enum offload_act_command  {
 703         FLOW_ACT_REPLACE,
 704         FLOW_ACT_DESTROY,
 705         FLOW_ACT_STATS,
 706 };
 707
 708 struct flow_offload_action {
 709         struct netlink_ext_ack *extack; /* NULL in FLOW_ACT_STATS process*/
 710         enum offload_act_command  command;
 711         enum flow_action_id id;
 712         u32 index;
 713         unsigned long cookie;
 714         struct flow_stats stats;
 715         struct flow_action action;
 716 };
 717
 718 struct flow_offload_action *offload_action_alloc(unsigned int num_actions);
 719
 720 static inline struct flow_rule *
 721 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
 722 {
 723         return flow_cmd->rule;
 724 }
 725
 726 static inline void flow_block_init(struct flow_block *flow_block)
 727 {
 728         INIT_LIST_HEAD(&flow_block->cb_list);
 729 }
 730
 731 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
 732                                       enum tc_setup_type type, void *type_data,
 733                                       void *data,
 734                                       void (*cleanup)(struct flow_block_cb *block_cb));
 735
 736 int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
 737 void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
 738                               void (*release)(void *cb_priv));
 739 int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
 740                                 enum tc_setup_type type, void *data,
 741                                 struct flow_block_offload *bo,
 742                                 void (*cleanup)(struct flow_block_cb *block_cb));
 743 bool flow_indr_dev_exists(void);
 744
 745 #endif /* _NET_FLOW_OFFLOAD_H */