1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _NET_NF_TABLES_H 3 #define _NET_NF_TABLES_H 4 5 #include <asm/unaligned.h> 6 #include <linux/list.h> 7 #include <linux/netfilter.h> 8 #include <linux/netfilter/nfnetlink.h> 9 #include <linux/netfilter/x_tables.h> 10 #include <linux/netfilter/nf_tables.h> 11 #include <linux/u64_stats_sync.h> 12 #include <linux/rhashtable.h> 13 #include <net/netfilter/nf_flow_table.h> 14 #include <net/netlink.h> 15 #include <net/flow_offload.h> 16 17 struct module; 18 19 #define NFT_JUMP_STACK_SIZE 16 20 21 struct nft_pktinfo { 22 struct sk_buff *skb; 23 bool tprot_set; 24 u8 tprot; 25 /* for x_tables compatibility */ 26 struct xt_action_param xt; 27 }; 28 29 static inline struct net *nft_net(const struct nft_pktinfo *pkt) 30 { 31 return pkt->xt.state->net; 32 } 33 34 static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 35 { 36 return pkt->xt.state->hook; 37 } 38 39 static inline u8 nft_pf(const struct nft_pktinfo *pkt) 40 { 41 return pkt->xt.state->pf; 42 } 43 44 static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 45 { 46 return pkt->xt.state->in; 47 } 48 49 static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 50 { 51 return pkt->xt.state->out; 52 } 53 54 static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 55 struct sk_buff *skb, 56 const struct nf_hook_state *state) 57 { 58 pkt->skb = skb; 59 pkt->xt.state = state; 60 } 61 62 static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, 63 struct sk_buff *skb) 64 { 65 pkt->tprot_set = false; 66 pkt->tprot = 0; 67 pkt->xt.thoff = 0; 68 pkt->xt.fragoff = 0; 69 } 70 71 /** 72 * struct nft_verdict - nf_tables verdict 73 * 74 * @code: nf_tables/netfilter verdict code 75 * @chain: destination chain for NFT_JUMP/NFT_GOTO 76 */ 77 struct nft_verdict { 78 u32 code; 79 struct nft_chain *chain; 80 }; 81 82 struct nft_data { 83 union { 84 u32 data[4]; 85 struct nft_verdict verdict; 86 }; 87 } __attribute__((aligned(__alignof__(u64)))); 88 89 /** 90 * struct nft_regs - nf_tables register set 91 * 92 * @data: data registers 93 * @verdict: verdict register 94 * 95 * The first four data registers alias to the verdict register. 96 */ 97 struct nft_regs { 98 union { 99 u32 data[20]; 100 struct nft_verdict verdict; 101 }; 102 }; 103 104 /* Store/load an u8, u16 or u64 integer to/from the u32 data register. 105 * 106 * Note, when using concatenations, register allocation happens at 32-bit 107 * level. So for store instruction, pad the rest part with zero to avoid 108 * garbage values. 109 */ 110 111 static inline void nft_reg_store8(u32 *dreg, u8 val) 112 { 113 *dreg = 0; 114 *(u8 *)dreg = val; 115 } 116 117 static inline u8 nft_reg_load8(const u32 *sreg) 118 { 119 return *(u8 *)sreg; 120 } 121 122 static inline void nft_reg_store16(u32 *dreg, u16 val) 123 { 124 *dreg = 0; 125 *(u16 *)dreg = val; 126 } 127 128 static inline u16 nft_reg_load16(const u32 *sreg) 129 { 130 return *(u16 *)sreg; 131 } 132 133 static inline void nft_reg_store64(u32 *dreg, u64 val) 134 { 135 put_unaligned(val, (u64 *)dreg); 136 } 137 138 static inline u64 nft_reg_load64(const u32 *sreg) 139 { 140 return get_unaligned((u64 *)sreg); 141 } 142 143 static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 144 unsigned int len) 145 { 146 memcpy(dst, src, len); 147 } 148 149 static inline void nft_data_debug(const struct nft_data *data) 150 { 151 pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", 152 data->data[0], data->data[1], 153 data->data[2], data->data[3]); 154 } 155 156 /** 157 * struct nft_ctx - nf_tables rule/set context 158 * 159 * @net: net namespace 160 * @table: the table the chain is contained in 161 * @chain: the chain the rule is contained in 162 * @nla: netlink attributes 163 * @portid: netlink portID of the original message 164 * @seq: netlink sequence number 165 * @family: protocol family 166 * @level: depth of the chains 167 * @report: notify via unicast netlink message 168 */ 169 struct nft_ctx { 170 struct net *net; 171 struct nft_table *table; 172 struct nft_chain *chain; 173 const struct nlattr * const *nla; 174 u32 portid; 175 u32 seq; 176 u16 flags; 177 u8 family; 178 u8 level; 179 bool report; 180 }; 181 182 struct nft_data_desc { 183 enum nft_data_types type; 184 unsigned int len; 185 }; 186 187 int nft_data_init(const struct nft_ctx *ctx, 188 struct nft_data *data, unsigned int size, 189 struct nft_data_desc *desc, const struct nlattr *nla); 190 void nft_data_hold(const struct nft_data *data, enum nft_data_types type); 191 void nft_data_release(const struct nft_data *data, enum nft_data_types type); 192 int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 193 enum nft_data_types type, unsigned int len); 194 195 static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 196 { 197 return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 198 } 199 200 static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 201 { 202 return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 203 } 204 205 int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 206 unsigned int nft_parse_register(const struct nlattr *attr); 207 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 208 209 int nft_validate_register_load(enum nft_registers reg, unsigned int len); 210 int nft_validate_register_store(const struct nft_ctx *ctx, 211 enum nft_registers reg, 212 const struct nft_data *data, 213 enum nft_data_types type, unsigned int len); 214 215 /** 216 * struct nft_userdata - user defined data associated with an object 217 * 218 * @len: length of the data 219 * @data: content 220 * 221 * The presence of user data is indicated in an object specific fashion, 222 * so a length of zero can't occur and the value "len" indicates data 223 * of length len + 1. 224 */ 225 struct nft_userdata { 226 u8 len; 227 unsigned char data[]; 228 }; 229 230 /** 231 * struct nft_set_elem - generic representation of set elements 232 * 233 * @key: element key 234 * @key_end: closing element key 235 * @priv: element private data and extensions 236 */ 237 struct nft_set_elem { 238 union { 239 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 240 struct nft_data val; 241 } key; 242 union { 243 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 244 struct nft_data val; 245 } key_end; 246 void *priv; 247 }; 248 249 struct nft_set; 250 struct nft_set_iter { 251 u8 genmask; 252 unsigned int count; 253 unsigned int skip; 254 int err; 255 int (*fn)(const struct nft_ctx *ctx, 256 struct nft_set *set, 257 const struct nft_set_iter *iter, 258 struct nft_set_elem *elem); 259 }; 260 261 /** 262 * struct nft_set_desc - description of set elements 263 * 264 * @klen: key length 265 * @dlen: data length 266 * @size: number of set elements 267 * @field_len: length of each field in concatenation, bytes 268 * @field_count: number of concatenated fields in element 269 * @expr: set must support for expressions 270 */ 271 struct nft_set_desc { 272 unsigned int klen; 273 unsigned int dlen; 274 unsigned int size; 275 u8 field_len[NFT_REG32_COUNT]; 276 u8 field_count; 277 bool expr; 278 }; 279 280 /** 281 * enum nft_set_class - performance class 282 * 283 * @NFT_LOOKUP_O_1: constant, O(1) 284 * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 285 * @NFT_LOOKUP_O_N: linear, O(N) 286 */ 287 enum nft_set_class { 288 NFT_SET_CLASS_O_1, 289 NFT_SET_CLASS_O_LOG_N, 290 NFT_SET_CLASS_O_N, 291 }; 292 293 /** 294 * struct nft_set_estimate - estimation of memory and performance 295 * characteristics 296 * 297 * @size: required memory 298 * @lookup: lookup performance class 299 * @space: memory class 300 */ 301 struct nft_set_estimate { 302 u64 size; 303 enum nft_set_class lookup; 304 enum nft_set_class space; 305 }; 306 307 struct nft_set_ext; 308 struct nft_expr; 309 310 /** 311 * struct nft_set_ops - nf_tables set operations 312 * 313 * @lookup: look up an element within the set 314 * @update: update an element if exists, add it if doesn't exist 315 * @delete: delete an element 316 * @insert: insert new element into set 317 * @activate: activate new element in the next generation 318 * @deactivate: lookup for element and deactivate it in the next generation 319 * @flush: deactivate element in the next generation 320 * @remove: remove element from set 321 * @walk: iterate over all set elements 322 * @get: get set elements 323 * @privsize: function to return size of set private data 324 * @init: initialize private data of new set instance 325 * @destroy: destroy private data of set instance 326 * @elemsize: element private size 327 * 328 * Operations lookup, update and delete have simpler interfaces, are faster 329 * and currently only used in the packet path. All the rest are slower, 330 * control plane functions. 331 */ 332 struct nft_set_ops { 333 bool (*lookup)(const struct net *net, 334 const struct nft_set *set, 335 const u32 *key, 336 const struct nft_set_ext **ext); 337 bool (*update)(struct nft_set *set, 338 const u32 *key, 339 void *(*new)(struct nft_set *, 340 const struct nft_expr *, 341 struct nft_regs *), 342 const struct nft_expr *expr, 343 struct nft_regs *regs, 344 const struct nft_set_ext **ext); 345 bool (*delete)(const struct nft_set *set, 346 const u32 *key); 347 348 int (*insert)(const struct net *net, 349 const struct nft_set *set, 350 const struct nft_set_elem *elem, 351 struct nft_set_ext **ext); 352 void (*activate)(const struct net *net, 353 const struct nft_set *set, 354 const struct nft_set_elem *elem); 355 void * (*deactivate)(const struct net *net, 356 const struct nft_set *set, 357 const struct nft_set_elem *elem); 358 bool (*flush)(const struct net *net, 359 const struct nft_set *set, 360 void *priv); 361 void (*remove)(const struct net *net, 362 const struct nft_set *set, 363 const struct nft_set_elem *elem); 364 void (*walk)(const struct nft_ctx *ctx, 365 struct nft_set *set, 366 struct nft_set_iter *iter); 367 void * (*get)(const struct net *net, 368 const struct nft_set *set, 369 const struct nft_set_elem *elem, 370 unsigned int flags); 371 372 u64 (*privsize)(const struct nlattr * const nla[], 373 const struct nft_set_desc *desc); 374 bool (*estimate)(const struct nft_set_desc *desc, 375 u32 features, 376 struct nft_set_estimate *est); 377 int (*init)(const struct nft_set *set, 378 const struct nft_set_desc *desc, 379 const struct nlattr * const nla[]); 380 void (*destroy)(const struct nft_set *set); 381 void (*gc_init)(const struct nft_set *set); 382 383 unsigned int elemsize; 384 }; 385 386 /** 387 * struct nft_set_type - nf_tables set type 388 * 389 * @ops: set ops for this type 390 * @features: features supported by the implementation 391 */ 392 struct nft_set_type { 393 const struct nft_set_ops ops; 394 u32 features; 395 }; 396 #define to_set_type(o) container_of(o, struct nft_set_type, ops) 397 398 /** 399 * struct nft_set - nf_tables set instance 400 * 401 * @list: table set list node 402 * @bindings: list of set bindings 403 * @table: table this set belongs to 404 * @net: netnamespace this set belongs to 405 * @name: name of the set 406 * @handle: unique handle of the set 407 * @ktype: key type (numeric type defined by userspace, not used in the kernel) 408 * @dtype: data type (verdict or numeric type defined by userspace) 409 * @objtype: object type (see NFT_OBJECT_* definitions) 410 * @size: maximum set size 411 * @field_len: length of each field in concatenation, bytes 412 * @field_count: number of concatenated fields in element 413 * @use: number of rules references to this set 414 * @nelems: number of elements 415 * @ndeact: number of deactivated elements queued for removal 416 * @timeout: default timeout value in jiffies 417 * @gc_int: garbage collection interval in msecs 418 * @policy: set parameterization (see enum nft_set_policies) 419 * @udlen: user data length 420 * @udata: user data 421 * @expr: stateful expression 422 * @ops: set ops 423 * @flags: set flags 424 * @genmask: generation mask 425 * @klen: key length 426 * @dlen: data length 427 * @data: private set data 428 */ 429 struct nft_set { 430 struct list_head list; 431 struct list_head bindings; 432 struct nft_table *table; 433 possible_net_t net; 434 char *name; 435 u64 handle; 436 u32 ktype; 437 u32 dtype; 438 u32 objtype; 439 u32 size; 440 u8 field_len[NFT_REG32_COUNT]; 441 u8 field_count; 442 u32 use; 443 atomic_t nelems; 444 u32 ndeact; 445 u64 timeout; 446 u32 gc_int; 447 u16 policy; 448 u16 udlen; 449 unsigned char *udata; 450 struct nft_expr *expr; 451 /* runtime data below here */ 452 const struct nft_set_ops *ops ____cacheline_aligned; 453 u16 flags:14, 454 genmask:2; 455 u8 klen; 456 u8 dlen; 457 unsigned char data[] 458 __attribute__((aligned(__alignof__(u64)))); 459 }; 460 461 static inline bool nft_set_is_anonymous(const struct nft_set *set) 462 { 463 return set->flags & NFT_SET_ANONYMOUS; 464 } 465 466 static inline void *nft_set_priv(const struct nft_set *set) 467 { 468 return (void *)set->data; 469 } 470 471 static inline struct nft_set *nft_set_container_of(const void *priv) 472 { 473 return (void *)priv - offsetof(struct nft_set, data); 474 } 475 476 struct nft_set *nft_set_lookup_global(const struct net *net, 477 const struct nft_table *table, 478 const struct nlattr *nla_set_name, 479 const struct nlattr *nla_set_id, 480 u8 genmask); 481 482 static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 483 { 484 return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 485 } 486 487 /** 488 * struct nft_set_binding - nf_tables set binding 489 * 490 * @list: set bindings list node 491 * @chain: chain containing the rule bound to the set 492 * @flags: set action flags 493 * 494 * A set binding contains all information necessary for validation 495 * of new elements added to a bound set. 496 */ 497 struct nft_set_binding { 498 struct list_head list; 499 const struct nft_chain *chain; 500 u32 flags; 501 }; 502 503 enum nft_trans_phase; 504 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 505 struct nft_set_binding *binding, 506 enum nft_trans_phase phase); 507 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 508 struct nft_set_binding *binding); 509 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 510 511 /** 512 * enum nft_set_extensions - set extension type IDs 513 * 514 * @NFT_SET_EXT_KEY: element key 515 * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 516 * @NFT_SET_EXT_DATA: mapping data 517 * @NFT_SET_EXT_FLAGS: element flags 518 * @NFT_SET_EXT_TIMEOUT: element timeout 519 * @NFT_SET_EXT_EXPIRATION: element expiration time 520 * @NFT_SET_EXT_USERDATA: user data associated with the element 521 * @NFT_SET_EXT_EXPR: expression assiociated with the element 522 * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 523 * @NFT_SET_EXT_NUM: number of extension types 524 */ 525 enum nft_set_extensions { 526 NFT_SET_EXT_KEY, 527 NFT_SET_EXT_KEY_END, 528 NFT_SET_EXT_DATA, 529 NFT_SET_EXT_FLAGS, 530 NFT_SET_EXT_TIMEOUT, 531 NFT_SET_EXT_EXPIRATION, 532 NFT_SET_EXT_USERDATA, 533 NFT_SET_EXT_EXPR, 534 NFT_SET_EXT_OBJREF, 535 NFT_SET_EXT_NUM 536 }; 537 538 /** 539 * struct nft_set_ext_type - set extension type 540 * 541 * @len: fixed part length of the extension 542 * @align: alignment requirements of the extension 543 */ 544 struct nft_set_ext_type { 545 u8 len; 546 u8 align; 547 }; 548 549 extern const struct nft_set_ext_type nft_set_ext_types[]; 550 551 /** 552 * struct nft_set_ext_tmpl - set extension template 553 * 554 * @len: length of extension area 555 * @offset: offsets of individual extension types 556 */ 557 struct nft_set_ext_tmpl { 558 u16 len; 559 u8 offset[NFT_SET_EXT_NUM]; 560 }; 561 562 /** 563 * struct nft_set_ext - set extensions 564 * 565 * @genmask: generation mask 566 * @offset: offsets of individual extension types 567 * @data: beginning of extension data 568 */ 569 struct nft_set_ext { 570 u8 genmask; 571 u8 offset[NFT_SET_EXT_NUM]; 572 char data[]; 573 }; 574 575 static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 576 { 577 memset(tmpl, 0, sizeof(*tmpl)); 578 tmpl->len = sizeof(struct nft_set_ext); 579 } 580 581 static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 582 unsigned int len) 583 { 584 tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 585 BUG_ON(tmpl->len > U8_MAX); 586 tmpl->offset[id] = tmpl->len; 587 tmpl->len += nft_set_ext_types[id].len + len; 588 } 589 590 static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 591 { 592 nft_set_ext_add_length(tmpl, id, 0); 593 } 594 595 static inline void nft_set_ext_init(struct nft_set_ext *ext, 596 const struct nft_set_ext_tmpl *tmpl) 597 { 598 memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 599 } 600 601 static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 602 { 603 return !!ext->offset[id]; 604 } 605 606 static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 607 { 608 return ext && __nft_set_ext_exists(ext, id); 609 } 610 611 static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 612 { 613 return (void *)ext + ext->offset[id]; 614 } 615 616 static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 617 { 618 return nft_set_ext(ext, NFT_SET_EXT_KEY); 619 } 620 621 static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 622 { 623 return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 624 } 625 626 static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 627 { 628 return nft_set_ext(ext, NFT_SET_EXT_DATA); 629 } 630 631 static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 632 { 633 return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 634 } 635 636 static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 637 { 638 return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 639 } 640 641 static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 642 { 643 return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 644 } 645 646 static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 647 { 648 return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 649 } 650 651 static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 652 { 653 return nft_set_ext(ext, NFT_SET_EXT_EXPR); 654 } 655 656 static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 657 { 658 return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 659 time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 660 } 661 662 static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 663 void *elem) 664 { 665 return elem + set->ops->elemsize; 666 } 667 668 static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 669 { 670 return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 671 } 672 673 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 674 const struct nft_set *set, 675 const struct nlattr *attr); 676 677 void *nft_set_elem_init(const struct nft_set *set, 678 const struct nft_set_ext_tmpl *tmpl, 679 const u32 *key, const u32 *key_end, const u32 *data, 680 u64 timeout, u64 expiration, gfp_t gfp); 681 void nft_set_elem_destroy(const struct nft_set *set, void *elem, 682 bool destroy_expr); 683 684 /** 685 * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 686 * 687 * @rcu: rcu head 688 * @set: set the elements belong to 689 * @cnt: count of elements 690 */ 691 struct nft_set_gc_batch_head { 692 struct rcu_head rcu; 693 const struct nft_set *set; 694 unsigned int cnt; 695 }; 696 697 #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 698 sizeof(struct nft_set_gc_batch_head)) / \ 699 sizeof(void *)) 700 701 /** 702 * struct nft_set_gc_batch - nf_tables set garbage collection batch 703 * 704 * @head: GC batch head 705 * @elems: garbage collection elements 706 */ 707 struct nft_set_gc_batch { 708 struct nft_set_gc_batch_head head; 709 void *elems[NFT_SET_GC_BATCH_SIZE]; 710 }; 711 712 struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 713 gfp_t gfp); 714 void nft_set_gc_batch_release(struct rcu_head *rcu); 715 716 static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 717 { 718 if (gcb != NULL) 719 call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 720 } 721 722 static inline struct nft_set_gc_batch * 723 nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 724 gfp_t gfp) 725 { 726 if (gcb != NULL) { 727 if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 728 return gcb; 729 nft_set_gc_batch_complete(gcb); 730 } 731 return nft_set_gc_batch_alloc(set, gfp); 732 } 733 734 static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 735 void *elem) 736 { 737 gcb->elems[gcb->head.cnt++] = elem; 738 } 739 740 struct nft_expr_ops; 741 /** 742 * struct nft_expr_type - nf_tables expression type 743 * 744 * @select_ops: function to select nft_expr_ops 745 * @release_ops: release nft_expr_ops 746 * @ops: default ops, used when no select_ops functions is present 747 * @list: used internally 748 * @name: Identifier 749 * @owner: module reference 750 * @policy: netlink attribute policy 751 * @maxattr: highest netlink attribute number 752 * @family: address family for AF-specific types 753 * @flags: expression type flags 754 */ 755 struct nft_expr_type { 756 const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 757 const struct nlattr * const tb[]); 758 void (*release_ops)(const struct nft_expr_ops *ops); 759 const struct nft_expr_ops *ops; 760 struct list_head list; 761 const char *name; 762 struct module *owner; 763 const struct nla_policy *policy; 764 unsigned int maxattr; 765 u8 family; 766 u8 flags; 767 }; 768 769 #define NFT_EXPR_STATEFUL 0x1 770 #define NFT_EXPR_GC 0x2 771 772 enum nft_trans_phase { 773 NFT_TRANS_PREPARE, 774 NFT_TRANS_ABORT, 775 NFT_TRANS_COMMIT, 776 NFT_TRANS_RELEASE 777 }; 778 779 struct nft_flow_rule; 780 struct nft_offload_ctx; 781 782 /** 783 * struct nft_expr_ops - nf_tables expression operations 784 * 785 * @eval: Expression evaluation function 786 * @size: full expression size, including private data size 787 * @init: initialization function 788 * @activate: activate expression in the next generation 789 * @deactivate: deactivate expression in next generation 790 * @destroy: destruction function, called after synchronize_rcu 791 * @dump: function to dump parameters 792 * @type: expression type 793 * @validate: validate expression, called during loop detection 794 * @data: extra data to attach to this expression operation 795 */ 796 struct nft_expr; 797 struct nft_expr_ops { 798 void (*eval)(const struct nft_expr *expr, 799 struct nft_regs *regs, 800 const struct nft_pktinfo *pkt); 801 int (*clone)(struct nft_expr *dst, 802 const struct nft_expr *src); 803 unsigned int size; 804 805 int (*init)(const struct nft_ctx *ctx, 806 const struct nft_expr *expr, 807 const struct nlattr * const tb[]); 808 void (*activate)(const struct nft_ctx *ctx, 809 const struct nft_expr *expr); 810 void (*deactivate)(const struct nft_ctx *ctx, 811 const struct nft_expr *expr, 812 enum nft_trans_phase phase); 813 void (*destroy)(const struct nft_ctx *ctx, 814 const struct nft_expr *expr); 815 void (*destroy_clone)(const struct nft_ctx *ctx, 816 const struct nft_expr *expr); 817 int (*dump)(struct sk_buff *skb, 818 const struct nft_expr *expr); 819 int (*validate)(const struct nft_ctx *ctx, 820 const struct nft_expr *expr, 821 const struct nft_data **data); 822 bool (*gc)(struct net *net, 823 const struct nft_expr *expr); 824 int (*offload)(struct nft_offload_ctx *ctx, 825 struct nft_flow_rule *flow, 826 const struct nft_expr *expr); 827 u32 offload_flags; 828 const struct nft_expr_type *type; 829 void *data; 830 }; 831 832 #define NFT_EXPR_MAXATTR 16 833 #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 834 ALIGN(size, __alignof__(struct nft_expr))) 835 836 /** 837 * struct nft_expr - nf_tables expression 838 * 839 * @ops: expression ops 840 * @data: expression private data 841 */ 842 struct nft_expr { 843 const struct nft_expr_ops *ops; 844 unsigned char data[] 845 __attribute__((aligned(__alignof__(u64)))); 846 }; 847 848 static inline void *nft_expr_priv(const struct nft_expr *expr) 849 { 850 return (void *)expr->data; 851 } 852 853 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); 854 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 855 int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 856 const struct nft_expr *expr); 857 858 /** 859 * struct nft_rule - nf_tables rule 860 * 861 * @list: used internally 862 * @handle: rule handle 863 * @genmask: generation mask 864 * @dlen: length of expression data 865 * @udata: user data is appended to the rule 866 * @data: expression data 867 */ 868 struct nft_rule { 869 struct list_head list; 870 u64 handle:42, 871 genmask:2, 872 dlen:12, 873 udata:1; 874 unsigned char data[] 875 __attribute__((aligned(__alignof__(struct nft_expr)))); 876 }; 877 878 static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 879 { 880 return (struct nft_expr *)&rule->data[0]; 881 } 882 883 static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 884 { 885 return ((void *)expr) + expr->ops->size; 886 } 887 888 static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 889 { 890 return (struct nft_expr *)&rule->data[rule->dlen]; 891 } 892 893 static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 894 { 895 return (void *)&rule->data[rule->dlen]; 896 } 897 898 static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 899 struct nft_regs *regs, 900 const struct nft_pktinfo *pkt) 901 { 902 struct nft_expr *expr; 903 904 if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) { 905 expr = nft_set_ext_expr(ext); 906 expr->ops->eval(expr, regs, pkt); 907 } 908 } 909 910 /* 911 * The last pointer isn't really necessary, but the compiler isn't able to 912 * determine that the result of nft_expr_last() is always the same since it 913 * can't assume that the dlen value wasn't changed within calls in the loop. 914 */ 915 #define nft_rule_for_each_expr(expr, last, rule) \ 916 for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 917 (expr) != (last); \ 918 (expr) = nft_expr_next(expr)) 919 920 enum nft_chain_flags { 921 NFT_BASE_CHAIN = 0x1, 922 NFT_CHAIN_HW_OFFLOAD = 0x2, 923 }; 924 925 #define NFT_CHAIN_POLICY_UNSET U8_MAX 926 927 /** 928 * struct nft_chain - nf_tables chain 929 * 930 * @rules: list of rules in the chain 931 * @list: used internally 932 * @rhlhead: used internally 933 * @table: table that this chain belongs to 934 * @handle: chain handle 935 * @use: number of jump references to this chain 936 * @flags: bitmask of enum nft_chain_flags 937 * @name: name of the chain 938 */ 939 struct nft_chain { 940 struct nft_rule *__rcu *rules_gen_0; 941 struct nft_rule *__rcu *rules_gen_1; 942 struct list_head rules; 943 struct list_head list; 944 struct rhlist_head rhlhead; 945 struct nft_table *table; 946 u64 handle; 947 u32 use; 948 u8 flags:6, 949 genmask:2; 950 char *name; 951 952 /* Only used during control plane commit phase: */ 953 struct nft_rule **rules_next; 954 }; 955 956 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 957 958 enum nft_chain_types { 959 NFT_CHAIN_T_DEFAULT = 0, 960 NFT_CHAIN_T_ROUTE, 961 NFT_CHAIN_T_NAT, 962 NFT_CHAIN_T_MAX 963 }; 964 965 /** 966 * struct nft_chain_type - nf_tables chain type info 967 * 968 * @name: name of the type 969 * @type: numeric identifier 970 * @family: address family 971 * @owner: module owner 972 * @hook_mask: mask of valid hooks 973 * @hooks: array of hook functions 974 * @ops_register: base chain register function 975 * @ops_unregister: base chain unregister function 976 */ 977 struct nft_chain_type { 978 const char *name; 979 enum nft_chain_types type; 980 int family; 981 struct module *owner; 982 unsigned int hook_mask; 983 nf_hookfn *hooks[NF_MAX_HOOKS]; 984 int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 985 void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 986 }; 987 988 int nft_chain_validate_dependency(const struct nft_chain *chain, 989 enum nft_chain_types type); 990 int nft_chain_validate_hooks(const struct nft_chain *chain, 991 unsigned int hook_flags); 992 993 struct nft_stats { 994 u64 bytes; 995 u64 pkts; 996 struct u64_stats_sync syncp; 997 }; 998 999 struct nft_hook { 1000 struct list_head list; 1001 struct nf_hook_ops ops; 1002 struct rcu_head rcu; 1003 }; 1004 1005 /** 1006 * struct nft_base_chain - nf_tables base chain 1007 * 1008 * @ops: netfilter hook ops 1009 * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 1010 * @type: chain type 1011 * @policy: default policy 1012 * @stats: per-cpu chain stats 1013 * @chain: the chain 1014 * @flow_block: flow block (for hardware offload) 1015 */ 1016 struct nft_base_chain { 1017 struct nf_hook_ops ops; 1018 struct list_head hook_list; 1019 const struct nft_chain_type *type; 1020 u8 policy; 1021 u8 flags; 1022 struct nft_stats __percpu *stats; 1023 struct nft_chain chain; 1024 struct flow_block flow_block; 1025 }; 1026 1027 static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 1028 { 1029 return container_of(chain, struct nft_base_chain, chain); 1030 } 1031 1032 static inline bool nft_is_base_chain(const struct nft_chain *chain) 1033 { 1034 return chain->flags & NFT_BASE_CHAIN; 1035 } 1036 1037 int __nft_release_basechain(struct nft_ctx *ctx); 1038 1039 unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 1040 1041 /** 1042 * struct nft_table - nf_tables table 1043 * 1044 * @list: used internally 1045 * @chains_ht: chains in the table 1046 * @chains: same, for stable walks 1047 * @sets: sets in the table 1048 * @objects: stateful objects in the table 1049 * @flowtables: flow tables in the table 1050 * @hgenerator: handle generator state 1051 * @handle: table handle 1052 * @use: number of chain references to this table 1053 * @flags: table flag (see enum nft_table_flags) 1054 * @genmask: generation mask 1055 * @afinfo: address family info 1056 * @name: name of the table 1057 */ 1058 struct nft_table { 1059 struct list_head list; 1060 struct rhltable chains_ht; 1061 struct list_head chains; 1062 struct list_head sets; 1063 struct list_head objects; 1064 struct list_head flowtables; 1065 u64 hgenerator; 1066 u64 handle; 1067 u32 use; 1068 u16 family:6, 1069 flags:8, 1070 genmask:2; 1071 char *name; 1072 }; 1073 1074 void nft_register_chain_type(const struct nft_chain_type *); 1075 void nft_unregister_chain_type(const struct nft_chain_type *); 1076 1077 int nft_register_expr(struct nft_expr_type *); 1078 void nft_unregister_expr(struct nft_expr_type *); 1079 1080 int nft_verdict_dump(struct sk_buff *skb, int type, 1081 const struct nft_verdict *v); 1082 1083 /** 1084 * struct nft_object_hash_key - key to lookup nft_object 1085 * 1086 * @name: name of the stateful object to look up 1087 * @table: table the object belongs to 1088 */ 1089 struct nft_object_hash_key { 1090 const char *name; 1091 const struct nft_table *table; 1092 }; 1093 1094 /** 1095 * struct nft_object - nf_tables stateful object 1096 * 1097 * @list: table stateful object list node 1098 * @key: keys that identify this object 1099 * @rhlhead: nft_objname_ht node 1100 * @genmask: generation mask 1101 * @use: number of references to this stateful object 1102 * @handle: unique object handle 1103 * @ops: object operations 1104 * @data: object data, layout depends on type 1105 */ 1106 struct nft_object { 1107 struct list_head list; 1108 struct rhlist_head rhlhead; 1109 struct nft_object_hash_key key; 1110 u32 genmask:2, 1111 use:30; 1112 u64 handle; 1113 /* runtime data below here */ 1114 const struct nft_object_ops *ops ____cacheline_aligned; 1115 unsigned char data[] 1116 __attribute__((aligned(__alignof__(u64)))); 1117 }; 1118 1119 static inline void *nft_obj_data(const struct nft_object *obj) 1120 { 1121 return (void *)obj->data; 1122 } 1123 1124 #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1125 1126 struct nft_object *nft_obj_lookup(const struct net *net, 1127 const struct nft_table *table, 1128 const struct nlattr *nla, u32 objtype, 1129 u8 genmask); 1130 1131 void nft_obj_notify(struct net *net, const struct nft_table *table, 1132 struct nft_object *obj, u32 portid, u32 seq, 1133 int event, int family, int report, gfp_t gfp); 1134 1135 /** 1136 * struct nft_object_type - stateful object type 1137 * 1138 * @select_ops: function to select nft_object_ops 1139 * @ops: default ops, used when no select_ops functions is present 1140 * @list: list node in list of object types 1141 * @type: stateful object numeric type 1142 * @owner: module owner 1143 * @maxattr: maximum netlink attribute 1144 * @policy: netlink attribute policy 1145 */ 1146 struct nft_object_type { 1147 const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1148 const struct nlattr * const tb[]); 1149 const struct nft_object_ops *ops; 1150 struct list_head list; 1151 u32 type; 1152 unsigned int maxattr; 1153 struct module *owner; 1154 const struct nla_policy *policy; 1155 }; 1156 1157 /** 1158 * struct nft_object_ops - stateful object operations 1159 * 1160 * @eval: stateful object evaluation function 1161 * @size: stateful object size 1162 * @init: initialize object from netlink attributes 1163 * @destroy: release existing stateful object 1164 * @dump: netlink dump stateful object 1165 * @update: update stateful object 1166 */ 1167 struct nft_object_ops { 1168 void (*eval)(struct nft_object *obj, 1169 struct nft_regs *regs, 1170 const struct nft_pktinfo *pkt); 1171 unsigned int size; 1172 int (*init)(const struct nft_ctx *ctx, 1173 const struct nlattr *const tb[], 1174 struct nft_object *obj); 1175 void (*destroy)(const struct nft_ctx *ctx, 1176 struct nft_object *obj); 1177 int (*dump)(struct sk_buff *skb, 1178 struct nft_object *obj, 1179 bool reset); 1180 void (*update)(struct nft_object *obj, 1181 struct nft_object *newobj); 1182 const struct nft_object_type *type; 1183 }; 1184 1185 int nft_register_obj(struct nft_object_type *obj_type); 1186 void nft_unregister_obj(struct nft_object_type *obj_type); 1187 1188 #define NFT_NETDEVICE_MAX 256 1189 1190 /** 1191 * struct nft_flowtable - nf_tables flow table 1192 * 1193 * @list: flow table list node in table list 1194 * @table: the table the flow table is contained in 1195 * @name: name of this flow table 1196 * @hooknum: hook number 1197 * @ops_len: number of hooks in array 1198 * @genmask: generation mask 1199 * @use: number of references to this flow table 1200 * @handle: unique object handle 1201 * @dev_name: array of device names 1202 * @data: rhashtable and garbage collector 1203 * @ops: array of hooks 1204 */ 1205 struct nft_flowtable { 1206 struct list_head list; 1207 struct nft_table *table; 1208 char *name; 1209 int hooknum; 1210 int ops_len; 1211 u32 genmask:2, 1212 use:30; 1213 u64 handle; 1214 /* runtime data below here */ 1215 struct list_head hook_list ____cacheline_aligned; 1216 struct nf_flowtable data; 1217 }; 1218 1219 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 1220 const struct nlattr *nla, 1221 u8 genmask); 1222 1223 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 1224 struct nft_flowtable *flowtable, 1225 enum nft_trans_phase phase); 1226 1227 void nft_register_flowtable_type(struct nf_flowtable_type *type); 1228 void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 1229 1230 /** 1231 * struct nft_traceinfo - nft tracing information and state 1232 * 1233 * @pkt: pktinfo currently processed 1234 * @basechain: base chain currently processed 1235 * @chain: chain currently processed 1236 * @rule: rule that was evaluated 1237 * @verdict: verdict given by rule 1238 * @type: event type (enum nft_trace_types) 1239 * @packet_dumped: packet headers sent in a previous traceinfo message 1240 * @trace: other struct members are initialised 1241 */ 1242 struct nft_traceinfo { 1243 const struct nft_pktinfo *pkt; 1244 const struct nft_base_chain *basechain; 1245 const struct nft_chain *chain; 1246 const struct nft_rule *rule; 1247 const struct nft_verdict *verdict; 1248 enum nft_trace_types type; 1249 bool packet_dumped; 1250 bool trace; 1251 }; 1252 1253 void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 1254 const struct nft_verdict *verdict, 1255 const struct nft_chain *basechain); 1256 1257 void nft_trace_notify(struct nft_traceinfo *info); 1258 1259 #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 1260 MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 1261 1262 #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 1263 MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 1264 1265 #define MODULE_ALIAS_NFT_EXPR(name) \ 1266 MODULE_ALIAS("nft-expr-" name) 1267 1268 #define MODULE_ALIAS_NFT_OBJ(type) \ 1269 MODULE_ALIAS("nft-obj-" __stringify(type)) 1270 1271 #if IS_ENABLED(CONFIG_NF_TABLES) 1272 1273 /* 1274 * The gencursor defines two generations, the currently active and the 1275 * next one. Objects contain a bitmask of 2 bits specifying the generations 1276 * they're active in. A set bit means they're inactive in the generation 1277 * represented by that bit. 1278 * 1279 * New objects start out as inactive in the current and active in the 1280 * next generation. When committing the ruleset the bitmask is cleared, 1281 * meaning they're active in all generations. When removing an object, 1282 * it is set inactive in the next generation. After committing the ruleset, 1283 * the objects are removed. 1284 */ 1285 static inline unsigned int nft_gencursor_next(const struct net *net) 1286 { 1287 return net->nft.gencursor + 1 == 1 ? 1 : 0; 1288 } 1289 1290 static inline u8 nft_genmask_next(const struct net *net) 1291 { 1292 return 1 << nft_gencursor_next(net); 1293 } 1294 1295 static inline u8 nft_genmask_cur(const struct net *net) 1296 { 1297 /* Use READ_ONCE() to prevent refetching the value for atomicity */ 1298 return 1 << READ_ONCE(net->nft.gencursor); 1299 } 1300 1301 #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 1302 1303 /* 1304 * Generic transaction helpers 1305 */ 1306 1307 /* Check if this object is currently active. */ 1308 #define nft_is_active(__net, __obj) \ 1309 (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1310 1311 /* Check if this object is active in the next generation. */ 1312 #define nft_is_active_next(__net, __obj) \ 1313 (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1314 1315 /* This object becomes active in the next generation. */ 1316 #define nft_activate_next(__net, __obj) \ 1317 (__obj)->genmask = nft_genmask_cur(__net) 1318 1319 /* This object becomes inactive in the next generation. */ 1320 #define nft_deactivate_next(__net, __obj) \ 1321 (__obj)->genmask = nft_genmask_next(__net) 1322 1323 /* After committing the ruleset, clear the stale generation bit. */ 1324 #define nft_clear(__net, __obj) \ 1325 (__obj)->genmask &= ~nft_genmask_next(__net) 1326 #define nft_active_genmask(__obj, __genmask) \ 1327 !((__obj)->genmask & __genmask) 1328 1329 /* 1330 * Set element transaction helpers 1331 */ 1332 1333 static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1334 u8 genmask) 1335 { 1336 return !(ext->genmask & genmask); 1337 } 1338 1339 static inline void nft_set_elem_change_active(const struct net *net, 1340 const struct nft_set *set, 1341 struct nft_set_ext *ext) 1342 { 1343 ext->genmask ^= nft_genmask_next(net); 1344 } 1345 1346 #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 1347 1348 /* 1349 * We use a free bit in the genmask field to indicate the element 1350 * is busy, meaning it is currently being processed either by 1351 * the netlink API or GC. 1352 * 1353 * Even though the genmask is only a single byte wide, this works 1354 * because the extension structure if fully constant once initialized, 1355 * so there are no non-atomic write accesses unless it is already 1356 * marked busy. 1357 */ 1358 #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 1359 1360 #if defined(__LITTLE_ENDIAN_BITFIELD) 1361 #define NFT_SET_ELEM_BUSY_BIT 2 1362 #elif defined(__BIG_ENDIAN_BITFIELD) 1363 #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 1364 #else 1365 #error 1366 #endif 1367 1368 static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 1369 { 1370 unsigned long *word = (unsigned long *)ext; 1371 1372 BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 1373 return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 1374 } 1375 1376 static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 1377 { 1378 unsigned long *word = (unsigned long *)ext; 1379 1380 clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 1381 } 1382 1383 /** 1384 * struct nft_trans - nf_tables object update in transaction 1385 * 1386 * @list: used internally 1387 * @msg_type: message type 1388 * @put_net: ctx->net needs to be put 1389 * @ctx: transaction context 1390 * @data: internal information related to the transaction 1391 */ 1392 struct nft_trans { 1393 struct list_head list; 1394 int msg_type; 1395 bool put_net; 1396 struct nft_ctx ctx; 1397 char data[]; 1398 }; 1399 1400 struct nft_trans_rule { 1401 struct nft_rule *rule; 1402 struct nft_flow_rule *flow; 1403 u32 rule_id; 1404 }; 1405 1406 #define nft_trans_rule(trans) \ 1407 (((struct nft_trans_rule *)trans->data)->rule) 1408 #define nft_trans_flow_rule(trans) \ 1409 (((struct nft_trans_rule *)trans->data)->flow) 1410 #define nft_trans_rule_id(trans) \ 1411 (((struct nft_trans_rule *)trans->data)->rule_id) 1412 1413 struct nft_trans_set { 1414 struct nft_set *set; 1415 u32 set_id; 1416 bool bound; 1417 }; 1418 1419 #define nft_trans_set(trans) \ 1420 (((struct nft_trans_set *)trans->data)->set) 1421 #define nft_trans_set_id(trans) \ 1422 (((struct nft_trans_set *)trans->data)->set_id) 1423 #define nft_trans_set_bound(trans) \ 1424 (((struct nft_trans_set *)trans->data)->bound) 1425 1426 struct nft_trans_chain { 1427 bool update; 1428 char *name; 1429 struct nft_stats __percpu *stats; 1430 u8 policy; 1431 }; 1432 1433 #define nft_trans_chain_update(trans) \ 1434 (((struct nft_trans_chain *)trans->data)->update) 1435 #define nft_trans_chain_name(trans) \ 1436 (((struct nft_trans_chain *)trans->data)->name) 1437 #define nft_trans_chain_stats(trans) \ 1438 (((struct nft_trans_chain *)trans->data)->stats) 1439 #define nft_trans_chain_policy(trans) \ 1440 (((struct nft_trans_chain *)trans->data)->policy) 1441 1442 struct nft_trans_table { 1443 bool update; 1444 bool enable; 1445 }; 1446 1447 #define nft_trans_table_update(trans) \ 1448 (((struct nft_trans_table *)trans->data)->update) 1449 #define nft_trans_table_enable(trans) \ 1450 (((struct nft_trans_table *)trans->data)->enable) 1451 1452 struct nft_trans_elem { 1453 struct nft_set *set; 1454 struct nft_set_elem elem; 1455 bool bound; 1456 }; 1457 1458 #define nft_trans_elem_set(trans) \ 1459 (((struct nft_trans_elem *)trans->data)->set) 1460 #define nft_trans_elem(trans) \ 1461 (((struct nft_trans_elem *)trans->data)->elem) 1462 #define nft_trans_elem_set_bound(trans) \ 1463 (((struct nft_trans_elem *)trans->data)->bound) 1464 1465 struct nft_trans_obj { 1466 struct nft_object *obj; 1467 struct nft_object *newobj; 1468 bool update; 1469 }; 1470 1471 #define nft_trans_obj(trans) \ 1472 (((struct nft_trans_obj *)trans->data)->obj) 1473 #define nft_trans_obj_newobj(trans) \ 1474 (((struct nft_trans_obj *)trans->data)->newobj) 1475 #define nft_trans_obj_update(trans) \ 1476 (((struct nft_trans_obj *)trans->data)->update) 1477 1478 struct nft_trans_flowtable { 1479 struct nft_flowtable *flowtable; 1480 }; 1481 1482 #define nft_trans_flowtable(trans) \ 1483 (((struct nft_trans_flowtable *)trans->data)->flowtable) 1484 1485 int __init nft_chain_filter_init(void); 1486 void nft_chain_filter_fini(void); 1487 1488 void __init nft_chain_route_init(void); 1489 void nft_chain_route_fini(void); 1490 #endif /* _NET_NF_TABLES_H */ 1491