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 union { 247 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 248 struct nft_data val; 249 } data; 250 void *priv; 251 }; 252 253 struct nft_set; 254 struct nft_set_iter { 255 u8 genmask; 256 unsigned int count; 257 unsigned int skip; 258 int err; 259 int (*fn)(const struct nft_ctx *ctx, 260 struct nft_set *set, 261 const struct nft_set_iter *iter, 262 struct nft_set_elem *elem); 263 }; 264 265 /** 266 * struct nft_set_desc - description of set elements 267 * 268 * @klen: key length 269 * @dlen: data length 270 * @size: number of set elements 271 * @field_len: length of each field in concatenation, bytes 272 * @field_count: number of concatenated fields in element 273 * @expr: set must support for expressions 274 */ 275 struct nft_set_desc { 276 unsigned int klen; 277 unsigned int dlen; 278 unsigned int size; 279 u8 field_len[NFT_REG32_COUNT]; 280 u8 field_count; 281 bool expr; 282 }; 283 284 /** 285 * enum nft_set_class - performance class 286 * 287 * @NFT_LOOKUP_O_1: constant, O(1) 288 * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 289 * @NFT_LOOKUP_O_N: linear, O(N) 290 */ 291 enum nft_set_class { 292 NFT_SET_CLASS_O_1, 293 NFT_SET_CLASS_O_LOG_N, 294 NFT_SET_CLASS_O_N, 295 }; 296 297 /** 298 * struct nft_set_estimate - estimation of memory and performance 299 * characteristics 300 * 301 * @size: required memory 302 * @lookup: lookup performance class 303 * @space: memory class 304 */ 305 struct nft_set_estimate { 306 u64 size; 307 enum nft_set_class lookup; 308 enum nft_set_class space; 309 }; 310 311 struct nft_set_ext; 312 struct nft_expr; 313 314 /** 315 * struct nft_set_ops - nf_tables set operations 316 * 317 * @lookup: look up an element within the set 318 * @update: update an element if exists, add it if doesn't exist 319 * @delete: delete an element 320 * @insert: insert new element into set 321 * @activate: activate new element in the next generation 322 * @deactivate: lookup for element and deactivate it in the next generation 323 * @flush: deactivate element in the next generation 324 * @remove: remove element from set 325 * @walk: iterate over all set elements 326 * @get: get set elements 327 * @privsize: function to return size of set private data 328 * @init: initialize private data of new set instance 329 * @destroy: destroy private data of set instance 330 * @elemsize: element private size 331 * 332 * Operations lookup, update and delete have simpler interfaces, are faster 333 * and currently only used in the packet path. All the rest are slower, 334 * control plane functions. 335 */ 336 struct nft_set_ops { 337 bool (*lookup)(const struct net *net, 338 const struct nft_set *set, 339 const u32 *key, 340 const struct nft_set_ext **ext); 341 bool (*update)(struct nft_set *set, 342 const u32 *key, 343 void *(*new)(struct nft_set *, 344 const struct nft_expr *, 345 struct nft_regs *), 346 const struct nft_expr *expr, 347 struct nft_regs *regs, 348 const struct nft_set_ext **ext); 349 bool (*delete)(const struct nft_set *set, 350 const u32 *key); 351 352 int (*insert)(const struct net *net, 353 const struct nft_set *set, 354 const struct nft_set_elem *elem, 355 struct nft_set_ext **ext); 356 void (*activate)(const struct net *net, 357 const struct nft_set *set, 358 const struct nft_set_elem *elem); 359 void * (*deactivate)(const struct net *net, 360 const struct nft_set *set, 361 const struct nft_set_elem *elem); 362 bool (*flush)(const struct net *net, 363 const struct nft_set *set, 364 void *priv); 365 void (*remove)(const struct net *net, 366 const struct nft_set *set, 367 const struct nft_set_elem *elem); 368 void (*walk)(const struct nft_ctx *ctx, 369 struct nft_set *set, 370 struct nft_set_iter *iter); 371 void * (*get)(const struct net *net, 372 const struct nft_set *set, 373 const struct nft_set_elem *elem, 374 unsigned int flags); 375 376 u64 (*privsize)(const struct nlattr * const nla[], 377 const struct nft_set_desc *desc); 378 bool (*estimate)(const struct nft_set_desc *desc, 379 u32 features, 380 struct nft_set_estimate *est); 381 int (*init)(const struct nft_set *set, 382 const struct nft_set_desc *desc, 383 const struct nlattr * const nla[]); 384 void (*destroy)(const struct nft_set *set); 385 void (*gc_init)(const struct nft_set *set); 386 387 unsigned int elemsize; 388 }; 389 390 /** 391 * struct nft_set_type - nf_tables set type 392 * 393 * @ops: set ops for this type 394 * @features: features supported by the implementation 395 */ 396 struct nft_set_type { 397 const struct nft_set_ops ops; 398 u32 features; 399 }; 400 #define to_set_type(o) container_of(o, struct nft_set_type, ops) 401 402 /** 403 * struct nft_set - nf_tables set instance 404 * 405 * @list: table set list node 406 * @bindings: list of set bindings 407 * @table: table this set belongs to 408 * @net: netnamespace this set belongs to 409 * @name: name of the set 410 * @handle: unique handle of the set 411 * @ktype: key type (numeric type defined by userspace, not used in the kernel) 412 * @dtype: data type (verdict or numeric type defined by userspace) 413 * @objtype: object type (see NFT_OBJECT_* definitions) 414 * @size: maximum set size 415 * @field_len: length of each field in concatenation, bytes 416 * @field_count: number of concatenated fields in element 417 * @use: number of rules references to this set 418 * @nelems: number of elements 419 * @ndeact: number of deactivated elements queued for removal 420 * @timeout: default timeout value in jiffies 421 * @gc_int: garbage collection interval in msecs 422 * @policy: set parameterization (see enum nft_set_policies) 423 * @udlen: user data length 424 * @udata: user data 425 * @expr: stateful expression 426 * @ops: set ops 427 * @flags: set flags 428 * @genmask: generation mask 429 * @klen: key length 430 * @dlen: data length 431 * @data: private set data 432 */ 433 struct nft_set { 434 struct list_head list; 435 struct list_head bindings; 436 struct nft_table *table; 437 possible_net_t net; 438 char *name; 439 u64 handle; 440 u32 ktype; 441 u32 dtype; 442 u32 objtype; 443 u32 size; 444 u8 field_len[NFT_REG32_COUNT]; 445 u8 field_count; 446 u32 use; 447 atomic_t nelems; 448 u32 ndeact; 449 u64 timeout; 450 u32 gc_int; 451 u16 policy; 452 u16 udlen; 453 unsigned char *udata; 454 struct nft_expr *expr; 455 /* runtime data below here */ 456 const struct nft_set_ops *ops ____cacheline_aligned; 457 u16 flags:14, 458 genmask:2; 459 u8 klen; 460 u8 dlen; 461 unsigned char data[] 462 __attribute__((aligned(__alignof__(u64)))); 463 }; 464 465 static inline bool nft_set_is_anonymous(const struct nft_set *set) 466 { 467 return set->flags & NFT_SET_ANONYMOUS; 468 } 469 470 static inline void *nft_set_priv(const struct nft_set *set) 471 { 472 return (void *)set->data; 473 } 474 475 static inline struct nft_set *nft_set_container_of(const void *priv) 476 { 477 return (void *)priv - offsetof(struct nft_set, data); 478 } 479 480 struct nft_set *nft_set_lookup_global(const struct net *net, 481 const struct nft_table *table, 482 const struct nlattr *nla_set_name, 483 const struct nlattr *nla_set_id, 484 u8 genmask); 485 486 static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 487 { 488 return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 489 } 490 491 /** 492 * struct nft_set_binding - nf_tables set binding 493 * 494 * @list: set bindings list node 495 * @chain: chain containing the rule bound to the set 496 * @flags: set action flags 497 * 498 * A set binding contains all information necessary for validation 499 * of new elements added to a bound set. 500 */ 501 struct nft_set_binding { 502 struct list_head list; 503 const struct nft_chain *chain; 504 u32 flags; 505 }; 506 507 enum nft_trans_phase; 508 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 509 struct nft_set_binding *binding, 510 enum nft_trans_phase phase); 511 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 512 struct nft_set_binding *binding); 513 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 514 515 /** 516 * enum nft_set_extensions - set extension type IDs 517 * 518 * @NFT_SET_EXT_KEY: element key 519 * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 520 * @NFT_SET_EXT_DATA: mapping data 521 * @NFT_SET_EXT_FLAGS: element flags 522 * @NFT_SET_EXT_TIMEOUT: element timeout 523 * @NFT_SET_EXT_EXPIRATION: element expiration time 524 * @NFT_SET_EXT_USERDATA: user data associated with the element 525 * @NFT_SET_EXT_EXPR: expression assiociated with the element 526 * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 527 * @NFT_SET_EXT_NUM: number of extension types 528 */ 529 enum nft_set_extensions { 530 NFT_SET_EXT_KEY, 531 NFT_SET_EXT_KEY_END, 532 NFT_SET_EXT_DATA, 533 NFT_SET_EXT_FLAGS, 534 NFT_SET_EXT_TIMEOUT, 535 NFT_SET_EXT_EXPIRATION, 536 NFT_SET_EXT_USERDATA, 537 NFT_SET_EXT_EXPR, 538 NFT_SET_EXT_OBJREF, 539 NFT_SET_EXT_NUM 540 }; 541 542 /** 543 * struct nft_set_ext_type - set extension type 544 * 545 * @len: fixed part length of the extension 546 * @align: alignment requirements of the extension 547 */ 548 struct nft_set_ext_type { 549 u8 len; 550 u8 align; 551 }; 552 553 extern const struct nft_set_ext_type nft_set_ext_types[]; 554 555 /** 556 * struct nft_set_ext_tmpl - set extension template 557 * 558 * @len: length of extension area 559 * @offset: offsets of individual extension types 560 */ 561 struct nft_set_ext_tmpl { 562 u16 len; 563 u8 offset[NFT_SET_EXT_NUM]; 564 }; 565 566 /** 567 * struct nft_set_ext - set extensions 568 * 569 * @genmask: generation mask 570 * @offset: offsets of individual extension types 571 * @data: beginning of extension data 572 */ 573 struct nft_set_ext { 574 u8 genmask; 575 u8 offset[NFT_SET_EXT_NUM]; 576 char data[]; 577 }; 578 579 static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 580 { 581 memset(tmpl, 0, sizeof(*tmpl)); 582 tmpl->len = sizeof(struct nft_set_ext); 583 } 584 585 static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 586 unsigned int len) 587 { 588 tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 589 BUG_ON(tmpl->len > U8_MAX); 590 tmpl->offset[id] = tmpl->len; 591 tmpl->len += nft_set_ext_types[id].len + len; 592 } 593 594 static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 595 { 596 nft_set_ext_add_length(tmpl, id, 0); 597 } 598 599 static inline void nft_set_ext_init(struct nft_set_ext *ext, 600 const struct nft_set_ext_tmpl *tmpl) 601 { 602 memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 603 } 604 605 static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 606 { 607 return !!ext->offset[id]; 608 } 609 610 static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 611 { 612 return ext && __nft_set_ext_exists(ext, id); 613 } 614 615 static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 616 { 617 return (void *)ext + ext->offset[id]; 618 } 619 620 static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 621 { 622 return nft_set_ext(ext, NFT_SET_EXT_KEY); 623 } 624 625 static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 626 { 627 return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 628 } 629 630 static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 631 { 632 return nft_set_ext(ext, NFT_SET_EXT_DATA); 633 } 634 635 static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 636 { 637 return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 638 } 639 640 static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 641 { 642 return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 643 } 644 645 static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 646 { 647 return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 648 } 649 650 static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 651 { 652 return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 653 } 654 655 static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 656 { 657 return nft_set_ext(ext, NFT_SET_EXT_EXPR); 658 } 659 660 static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 661 { 662 return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 663 time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 664 } 665 666 static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 667 void *elem) 668 { 669 return elem + set->ops->elemsize; 670 } 671 672 static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 673 { 674 return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 675 } 676 677 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 678 const struct nft_set *set, 679 const struct nlattr *attr); 680 681 void *nft_set_elem_init(const struct nft_set *set, 682 const struct nft_set_ext_tmpl *tmpl, 683 const u32 *key, const u32 *key_end, const u32 *data, 684 u64 timeout, u64 expiration, gfp_t gfp); 685 void nft_set_elem_destroy(const struct nft_set *set, void *elem, 686 bool destroy_expr); 687 688 /** 689 * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 690 * 691 * @rcu: rcu head 692 * @set: set the elements belong to 693 * @cnt: count of elements 694 */ 695 struct nft_set_gc_batch_head { 696 struct rcu_head rcu; 697 const struct nft_set *set; 698 unsigned int cnt; 699 }; 700 701 #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 702 sizeof(struct nft_set_gc_batch_head)) / \ 703 sizeof(void *)) 704 705 /** 706 * struct nft_set_gc_batch - nf_tables set garbage collection batch 707 * 708 * @head: GC batch head 709 * @elems: garbage collection elements 710 */ 711 struct nft_set_gc_batch { 712 struct nft_set_gc_batch_head head; 713 void *elems[NFT_SET_GC_BATCH_SIZE]; 714 }; 715 716 struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 717 gfp_t gfp); 718 void nft_set_gc_batch_release(struct rcu_head *rcu); 719 720 static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 721 { 722 if (gcb != NULL) 723 call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 724 } 725 726 static inline struct nft_set_gc_batch * 727 nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 728 gfp_t gfp) 729 { 730 if (gcb != NULL) { 731 if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 732 return gcb; 733 nft_set_gc_batch_complete(gcb); 734 } 735 return nft_set_gc_batch_alloc(set, gfp); 736 } 737 738 static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 739 void *elem) 740 { 741 gcb->elems[gcb->head.cnt++] = elem; 742 } 743 744 struct nft_expr_ops; 745 /** 746 * struct nft_expr_type - nf_tables expression type 747 * 748 * @select_ops: function to select nft_expr_ops 749 * @release_ops: release nft_expr_ops 750 * @ops: default ops, used when no select_ops functions is present 751 * @list: used internally 752 * @name: Identifier 753 * @owner: module reference 754 * @policy: netlink attribute policy 755 * @maxattr: highest netlink attribute number 756 * @family: address family for AF-specific types 757 * @flags: expression type flags 758 */ 759 struct nft_expr_type { 760 const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 761 const struct nlattr * const tb[]); 762 void (*release_ops)(const struct nft_expr_ops *ops); 763 const struct nft_expr_ops *ops; 764 struct list_head list; 765 const char *name; 766 struct module *owner; 767 const struct nla_policy *policy; 768 unsigned int maxattr; 769 u8 family; 770 u8 flags; 771 }; 772 773 #define NFT_EXPR_STATEFUL 0x1 774 #define NFT_EXPR_GC 0x2 775 776 enum nft_trans_phase { 777 NFT_TRANS_PREPARE, 778 NFT_TRANS_ABORT, 779 NFT_TRANS_COMMIT, 780 NFT_TRANS_RELEASE 781 }; 782 783 struct nft_flow_rule; 784 struct nft_offload_ctx; 785 786 /** 787 * struct nft_expr_ops - nf_tables expression operations 788 * 789 * @eval: Expression evaluation function 790 * @size: full expression size, including private data size 791 * @init: initialization function 792 * @activate: activate expression in the next generation 793 * @deactivate: deactivate expression in next generation 794 * @destroy: destruction function, called after synchronize_rcu 795 * @dump: function to dump parameters 796 * @type: expression type 797 * @validate: validate expression, called during loop detection 798 * @data: extra data to attach to this expression operation 799 */ 800 struct nft_expr; 801 struct nft_expr_ops { 802 void (*eval)(const struct nft_expr *expr, 803 struct nft_regs *regs, 804 const struct nft_pktinfo *pkt); 805 int (*clone)(struct nft_expr *dst, 806 const struct nft_expr *src); 807 unsigned int size; 808 809 int (*init)(const struct nft_ctx *ctx, 810 const struct nft_expr *expr, 811 const struct nlattr * const tb[]); 812 void (*activate)(const struct nft_ctx *ctx, 813 const struct nft_expr *expr); 814 void (*deactivate)(const struct nft_ctx *ctx, 815 const struct nft_expr *expr, 816 enum nft_trans_phase phase); 817 void (*destroy)(const struct nft_ctx *ctx, 818 const struct nft_expr *expr); 819 void (*destroy_clone)(const struct nft_ctx *ctx, 820 const struct nft_expr *expr); 821 int (*dump)(struct sk_buff *skb, 822 const struct nft_expr *expr); 823 int (*validate)(const struct nft_ctx *ctx, 824 const struct nft_expr *expr, 825 const struct nft_data **data); 826 bool (*gc)(struct net *net, 827 const struct nft_expr *expr); 828 int (*offload)(struct nft_offload_ctx *ctx, 829 struct nft_flow_rule *flow, 830 const struct nft_expr *expr); 831 u32 offload_flags; 832 const struct nft_expr_type *type; 833 void *data; 834 }; 835 836 #define NFT_EXPR_MAXATTR 16 837 #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 838 ALIGN(size, __alignof__(struct nft_expr))) 839 840 /** 841 * struct nft_expr - nf_tables expression 842 * 843 * @ops: expression ops 844 * @data: expression private data 845 */ 846 struct nft_expr { 847 const struct nft_expr_ops *ops; 848 unsigned char data[] 849 __attribute__((aligned(__alignof__(u64)))); 850 }; 851 852 static inline void *nft_expr_priv(const struct nft_expr *expr) 853 { 854 return (void *)expr->data; 855 } 856 857 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); 858 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 859 int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 860 const struct nft_expr *expr); 861 862 /** 863 * struct nft_rule - nf_tables rule 864 * 865 * @list: used internally 866 * @handle: rule handle 867 * @genmask: generation mask 868 * @dlen: length of expression data 869 * @udata: user data is appended to the rule 870 * @data: expression data 871 */ 872 struct nft_rule { 873 struct list_head list; 874 u64 handle:42, 875 genmask:2, 876 dlen:12, 877 udata:1; 878 unsigned char data[] 879 __attribute__((aligned(__alignof__(struct nft_expr)))); 880 }; 881 882 static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 883 { 884 return (struct nft_expr *)&rule->data[0]; 885 } 886 887 static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 888 { 889 return ((void *)expr) + expr->ops->size; 890 } 891 892 static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 893 { 894 return (struct nft_expr *)&rule->data[rule->dlen]; 895 } 896 897 static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 898 { 899 return (void *)&rule->data[rule->dlen]; 900 } 901 902 void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule); 903 904 static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 905 struct nft_regs *regs, 906 const struct nft_pktinfo *pkt) 907 { 908 struct nft_expr *expr; 909 910 if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) { 911 expr = nft_set_ext_expr(ext); 912 expr->ops->eval(expr, regs, pkt); 913 } 914 } 915 916 /* 917 * The last pointer isn't really necessary, but the compiler isn't able to 918 * determine that the result of nft_expr_last() is always the same since it 919 * can't assume that the dlen value wasn't changed within calls in the loop. 920 */ 921 #define nft_rule_for_each_expr(expr, last, rule) \ 922 for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 923 (expr) != (last); \ 924 (expr) = nft_expr_next(expr)) 925 926 #define NFT_CHAIN_POLICY_UNSET U8_MAX 927 928 /** 929 * struct nft_chain - nf_tables chain 930 * 931 * @rules: list of rules in the chain 932 * @list: used internally 933 * @rhlhead: used internally 934 * @table: table that this chain belongs to 935 * @handle: chain handle 936 * @use: number of jump references to this chain 937 * @flags: bitmask of enum nft_chain_flags 938 * @name: name of the chain 939 */ 940 struct nft_chain { 941 struct nft_rule *__rcu *rules_gen_0; 942 struct nft_rule *__rcu *rules_gen_1; 943 struct list_head rules; 944 struct list_head list; 945 struct rhlist_head rhlhead; 946 struct nft_table *table; 947 u64 handle; 948 u32 use; 949 u8 flags:5, 950 bound:1, 951 genmask:2; 952 char *name; 953 954 /* Only used during control plane commit phase: */ 955 struct nft_rule **rules_next; 956 }; 957 958 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 959 960 enum nft_chain_types { 961 NFT_CHAIN_T_DEFAULT = 0, 962 NFT_CHAIN_T_ROUTE, 963 NFT_CHAIN_T_NAT, 964 NFT_CHAIN_T_MAX 965 }; 966 967 /** 968 * struct nft_chain_type - nf_tables chain type info 969 * 970 * @name: name of the type 971 * @type: numeric identifier 972 * @family: address family 973 * @owner: module owner 974 * @hook_mask: mask of valid hooks 975 * @hooks: array of hook functions 976 * @ops_register: base chain register function 977 * @ops_unregister: base chain unregister function 978 */ 979 struct nft_chain_type { 980 const char *name; 981 enum nft_chain_types type; 982 int family; 983 struct module *owner; 984 unsigned int hook_mask; 985 nf_hookfn *hooks[NF_MAX_HOOKS]; 986 int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 987 void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 988 }; 989 990 int nft_chain_validate_dependency(const struct nft_chain *chain, 991 enum nft_chain_types type); 992 int nft_chain_validate_hooks(const struct nft_chain *chain, 993 unsigned int hook_flags); 994 995 static inline bool nft_chain_is_bound(struct nft_chain *chain) 996 { 997 return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 998 } 999 1000 void nft_chain_del(struct nft_chain *chain); 1001 void nf_tables_chain_destroy(struct nft_ctx *ctx); 1002 1003 struct nft_stats { 1004 u64 bytes; 1005 u64 pkts; 1006 struct u64_stats_sync syncp; 1007 }; 1008 1009 struct nft_hook { 1010 struct list_head list; 1011 bool inactive; 1012 struct nf_hook_ops ops; 1013 struct rcu_head rcu; 1014 }; 1015 1016 /** 1017 * struct nft_base_chain - nf_tables base chain 1018 * 1019 * @ops: netfilter hook ops 1020 * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 1021 * @type: chain type 1022 * @policy: default policy 1023 * @stats: per-cpu chain stats 1024 * @chain: the chain 1025 * @flow_block: flow block (for hardware offload) 1026 */ 1027 struct nft_base_chain { 1028 struct nf_hook_ops ops; 1029 struct list_head hook_list; 1030 const struct nft_chain_type *type; 1031 u8 policy; 1032 u8 flags; 1033 struct nft_stats __percpu *stats; 1034 struct nft_chain chain; 1035 struct flow_block flow_block; 1036 }; 1037 1038 static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 1039 { 1040 return container_of(chain, struct nft_base_chain, chain); 1041 } 1042 1043 static inline bool nft_is_base_chain(const struct nft_chain *chain) 1044 { 1045 return chain->flags & NFT_CHAIN_BASE; 1046 } 1047 1048 int __nft_release_basechain(struct nft_ctx *ctx); 1049 1050 unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 1051 1052 /** 1053 * struct nft_table - nf_tables table 1054 * 1055 * @list: used internally 1056 * @chains_ht: chains in the table 1057 * @chains: same, for stable walks 1058 * @sets: sets in the table 1059 * @objects: stateful objects in the table 1060 * @flowtables: flow tables in the table 1061 * @hgenerator: handle generator state 1062 * @handle: table handle 1063 * @use: number of chain references to this table 1064 * @flags: table flag (see enum nft_table_flags) 1065 * @genmask: generation mask 1066 * @afinfo: address family info 1067 * @name: name of the table 1068 */ 1069 struct nft_table { 1070 struct list_head list; 1071 struct rhltable chains_ht; 1072 struct list_head chains; 1073 struct list_head sets; 1074 struct list_head objects; 1075 struct list_head flowtables; 1076 u64 hgenerator; 1077 u64 handle; 1078 u32 use; 1079 u16 family:6, 1080 flags:8, 1081 genmask:2; 1082 char *name; 1083 }; 1084 1085 void nft_register_chain_type(const struct nft_chain_type *); 1086 void nft_unregister_chain_type(const struct nft_chain_type *); 1087 1088 int nft_register_expr(struct nft_expr_type *); 1089 void nft_unregister_expr(struct nft_expr_type *); 1090 1091 int nft_verdict_dump(struct sk_buff *skb, int type, 1092 const struct nft_verdict *v); 1093 1094 /** 1095 * struct nft_object_hash_key - key to lookup nft_object 1096 * 1097 * @name: name of the stateful object to look up 1098 * @table: table the object belongs to 1099 */ 1100 struct nft_object_hash_key { 1101 const char *name; 1102 const struct nft_table *table; 1103 }; 1104 1105 /** 1106 * struct nft_object - nf_tables stateful object 1107 * 1108 * @list: table stateful object list node 1109 * @key: keys that identify this object 1110 * @rhlhead: nft_objname_ht node 1111 * @genmask: generation mask 1112 * @use: number of references to this stateful object 1113 * @handle: unique object handle 1114 * @ops: object operations 1115 * @data: object data, layout depends on type 1116 */ 1117 struct nft_object { 1118 struct list_head list; 1119 struct rhlist_head rhlhead; 1120 struct nft_object_hash_key key; 1121 u32 genmask:2, 1122 use:30; 1123 u64 handle; 1124 /* runtime data below here */ 1125 const struct nft_object_ops *ops ____cacheline_aligned; 1126 unsigned char data[] 1127 __attribute__((aligned(__alignof__(u64)))); 1128 }; 1129 1130 static inline void *nft_obj_data(const struct nft_object *obj) 1131 { 1132 return (void *)obj->data; 1133 } 1134 1135 #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1136 1137 struct nft_object *nft_obj_lookup(const struct net *net, 1138 const struct nft_table *table, 1139 const struct nlattr *nla, u32 objtype, 1140 u8 genmask); 1141 1142 void nft_obj_notify(struct net *net, const struct nft_table *table, 1143 struct nft_object *obj, u32 portid, u32 seq, 1144 int event, int family, int report, gfp_t gfp); 1145 1146 /** 1147 * struct nft_object_type - stateful object type 1148 * 1149 * @select_ops: function to select nft_object_ops 1150 * @ops: default ops, used when no select_ops functions is present 1151 * @list: list node in list of object types 1152 * @type: stateful object numeric type 1153 * @owner: module owner 1154 * @maxattr: maximum netlink attribute 1155 * @policy: netlink attribute policy 1156 */ 1157 struct nft_object_type { 1158 const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1159 const struct nlattr * const tb[]); 1160 const struct nft_object_ops *ops; 1161 struct list_head list; 1162 u32 type; 1163 unsigned int maxattr; 1164 struct module *owner; 1165 const struct nla_policy *policy; 1166 }; 1167 1168 /** 1169 * struct nft_object_ops - stateful object operations 1170 * 1171 * @eval: stateful object evaluation function 1172 * @size: stateful object size 1173 * @init: initialize object from netlink attributes 1174 * @destroy: release existing stateful object 1175 * @dump: netlink dump stateful object 1176 * @update: update stateful object 1177 */ 1178 struct nft_object_ops { 1179 void (*eval)(struct nft_object *obj, 1180 struct nft_regs *regs, 1181 const struct nft_pktinfo *pkt); 1182 unsigned int size; 1183 int (*init)(const struct nft_ctx *ctx, 1184 const struct nlattr *const tb[], 1185 struct nft_object *obj); 1186 void (*destroy)(const struct nft_ctx *ctx, 1187 struct nft_object *obj); 1188 int (*dump)(struct sk_buff *skb, 1189 struct nft_object *obj, 1190 bool reset); 1191 void (*update)(struct nft_object *obj, 1192 struct nft_object *newobj); 1193 const struct nft_object_type *type; 1194 }; 1195 1196 int nft_register_obj(struct nft_object_type *obj_type); 1197 void nft_unregister_obj(struct nft_object_type *obj_type); 1198 1199 #define NFT_NETDEVICE_MAX 256 1200 1201 /** 1202 * struct nft_flowtable - nf_tables flow table 1203 * 1204 * @list: flow table list node in table list 1205 * @table: the table the flow table is contained in 1206 * @name: name of this flow table 1207 * @hooknum: hook number 1208 * @ops_len: number of hooks in array 1209 * @genmask: generation mask 1210 * @use: number of references to this flow table 1211 * @handle: unique object handle 1212 * @dev_name: array of device names 1213 * @data: rhashtable and garbage collector 1214 * @ops: array of hooks 1215 */ 1216 struct nft_flowtable { 1217 struct list_head list; 1218 struct nft_table *table; 1219 char *name; 1220 int hooknum; 1221 int ops_len; 1222 u32 genmask:2, 1223 use:30; 1224 u64 handle; 1225 /* runtime data below here */ 1226 struct list_head hook_list ____cacheline_aligned; 1227 struct nf_flowtable data; 1228 }; 1229 1230 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 1231 const struct nlattr *nla, 1232 u8 genmask); 1233 1234 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 1235 struct nft_flowtable *flowtable, 1236 enum nft_trans_phase phase); 1237 1238 void nft_register_flowtable_type(struct nf_flowtable_type *type); 1239 void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 1240 1241 /** 1242 * struct nft_traceinfo - nft tracing information and state 1243 * 1244 * @pkt: pktinfo currently processed 1245 * @basechain: base chain currently processed 1246 * @chain: chain currently processed 1247 * @rule: rule that was evaluated 1248 * @verdict: verdict given by rule 1249 * @type: event type (enum nft_trace_types) 1250 * @packet_dumped: packet headers sent in a previous traceinfo message 1251 * @trace: other struct members are initialised 1252 */ 1253 struct nft_traceinfo { 1254 const struct nft_pktinfo *pkt; 1255 const struct nft_base_chain *basechain; 1256 const struct nft_chain *chain; 1257 const struct nft_rule *rule; 1258 const struct nft_verdict *verdict; 1259 enum nft_trace_types type; 1260 bool packet_dumped; 1261 bool trace; 1262 }; 1263 1264 void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 1265 const struct nft_verdict *verdict, 1266 const struct nft_chain *basechain); 1267 1268 void nft_trace_notify(struct nft_traceinfo *info); 1269 1270 #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 1271 MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 1272 1273 #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 1274 MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 1275 1276 #define MODULE_ALIAS_NFT_EXPR(name) \ 1277 MODULE_ALIAS("nft-expr-" name) 1278 1279 #define MODULE_ALIAS_NFT_OBJ(type) \ 1280 MODULE_ALIAS("nft-obj-" __stringify(type)) 1281 1282 #if IS_ENABLED(CONFIG_NF_TABLES) 1283 1284 /* 1285 * The gencursor defines two generations, the currently active and the 1286 * next one. Objects contain a bitmask of 2 bits specifying the generations 1287 * they're active in. A set bit means they're inactive in the generation 1288 * represented by that bit. 1289 * 1290 * New objects start out as inactive in the current and active in the 1291 * next generation. When committing the ruleset the bitmask is cleared, 1292 * meaning they're active in all generations. When removing an object, 1293 * it is set inactive in the next generation. After committing the ruleset, 1294 * the objects are removed. 1295 */ 1296 static inline unsigned int nft_gencursor_next(const struct net *net) 1297 { 1298 return net->nft.gencursor + 1 == 1 ? 1 : 0; 1299 } 1300 1301 static inline u8 nft_genmask_next(const struct net *net) 1302 { 1303 return 1 << nft_gencursor_next(net); 1304 } 1305 1306 static inline u8 nft_genmask_cur(const struct net *net) 1307 { 1308 /* Use READ_ONCE() to prevent refetching the value for atomicity */ 1309 return 1 << READ_ONCE(net->nft.gencursor); 1310 } 1311 1312 #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 1313 1314 /* 1315 * Generic transaction helpers 1316 */ 1317 1318 /* Check if this object is currently active. */ 1319 #define nft_is_active(__net, __obj) \ 1320 (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1321 1322 /* Check if this object is active in the next generation. */ 1323 #define nft_is_active_next(__net, __obj) \ 1324 (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1325 1326 /* This object becomes active in the next generation. */ 1327 #define nft_activate_next(__net, __obj) \ 1328 (__obj)->genmask = nft_genmask_cur(__net) 1329 1330 /* This object becomes inactive in the next generation. */ 1331 #define nft_deactivate_next(__net, __obj) \ 1332 (__obj)->genmask = nft_genmask_next(__net) 1333 1334 /* After committing the ruleset, clear the stale generation bit. */ 1335 #define nft_clear(__net, __obj) \ 1336 (__obj)->genmask &= ~nft_genmask_next(__net) 1337 #define nft_active_genmask(__obj, __genmask) \ 1338 !((__obj)->genmask & __genmask) 1339 1340 /* 1341 * Set element transaction helpers 1342 */ 1343 1344 static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1345 u8 genmask) 1346 { 1347 return !(ext->genmask & genmask); 1348 } 1349 1350 static inline void nft_set_elem_change_active(const struct net *net, 1351 const struct nft_set *set, 1352 struct nft_set_ext *ext) 1353 { 1354 ext->genmask ^= nft_genmask_next(net); 1355 } 1356 1357 #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 1358 1359 /* 1360 * We use a free bit in the genmask field to indicate the element 1361 * is busy, meaning it is currently being processed either by 1362 * the netlink API or GC. 1363 * 1364 * Even though the genmask is only a single byte wide, this works 1365 * because the extension structure if fully constant once initialized, 1366 * so there are no non-atomic write accesses unless it is already 1367 * marked busy. 1368 */ 1369 #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 1370 1371 #if defined(__LITTLE_ENDIAN_BITFIELD) 1372 #define NFT_SET_ELEM_BUSY_BIT 2 1373 #elif defined(__BIG_ENDIAN_BITFIELD) 1374 #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 1375 #else 1376 #error 1377 #endif 1378 1379 static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 1380 { 1381 unsigned long *word = (unsigned long *)ext; 1382 1383 BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 1384 return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 1385 } 1386 1387 static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 1388 { 1389 unsigned long *word = (unsigned long *)ext; 1390 1391 clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 1392 } 1393 1394 /** 1395 * struct nft_trans - nf_tables object update in transaction 1396 * 1397 * @list: used internally 1398 * @msg_type: message type 1399 * @put_net: ctx->net needs to be put 1400 * @ctx: transaction context 1401 * @data: internal information related to the transaction 1402 */ 1403 struct nft_trans { 1404 struct list_head list; 1405 int msg_type; 1406 bool put_net; 1407 struct nft_ctx ctx; 1408 char data[]; 1409 }; 1410 1411 struct nft_trans_rule { 1412 struct nft_rule *rule; 1413 struct nft_flow_rule *flow; 1414 u32 rule_id; 1415 }; 1416 1417 #define nft_trans_rule(trans) \ 1418 (((struct nft_trans_rule *)trans->data)->rule) 1419 #define nft_trans_flow_rule(trans) \ 1420 (((struct nft_trans_rule *)trans->data)->flow) 1421 #define nft_trans_rule_id(trans) \ 1422 (((struct nft_trans_rule *)trans->data)->rule_id) 1423 1424 struct nft_trans_set { 1425 struct nft_set *set; 1426 u32 set_id; 1427 bool bound; 1428 }; 1429 1430 #define nft_trans_set(trans) \ 1431 (((struct nft_trans_set *)trans->data)->set) 1432 #define nft_trans_set_id(trans) \ 1433 (((struct nft_trans_set *)trans->data)->set_id) 1434 #define nft_trans_set_bound(trans) \ 1435 (((struct nft_trans_set *)trans->data)->bound) 1436 1437 struct nft_trans_chain { 1438 bool update; 1439 char *name; 1440 struct nft_stats __percpu *stats; 1441 u8 policy; 1442 u32 chain_id; 1443 }; 1444 1445 #define nft_trans_chain_update(trans) \ 1446 (((struct nft_trans_chain *)trans->data)->update) 1447 #define nft_trans_chain_name(trans) \ 1448 (((struct nft_trans_chain *)trans->data)->name) 1449 #define nft_trans_chain_stats(trans) \ 1450 (((struct nft_trans_chain *)trans->data)->stats) 1451 #define nft_trans_chain_policy(trans) \ 1452 (((struct nft_trans_chain *)trans->data)->policy) 1453 #define nft_trans_chain_id(trans) \ 1454 (((struct nft_trans_chain *)trans->data)->chain_id) 1455 1456 struct nft_trans_table { 1457 bool update; 1458 bool enable; 1459 }; 1460 1461 #define nft_trans_table_update(trans) \ 1462 (((struct nft_trans_table *)trans->data)->update) 1463 #define nft_trans_table_enable(trans) \ 1464 (((struct nft_trans_table *)trans->data)->enable) 1465 1466 struct nft_trans_elem { 1467 struct nft_set *set; 1468 struct nft_set_elem elem; 1469 bool bound; 1470 }; 1471 1472 #define nft_trans_elem_set(trans) \ 1473 (((struct nft_trans_elem *)trans->data)->set) 1474 #define nft_trans_elem(trans) \ 1475 (((struct nft_trans_elem *)trans->data)->elem) 1476 #define nft_trans_elem_set_bound(trans) \ 1477 (((struct nft_trans_elem *)trans->data)->bound) 1478 1479 struct nft_trans_obj { 1480 struct nft_object *obj; 1481 struct nft_object *newobj; 1482 bool update; 1483 }; 1484 1485 #define nft_trans_obj(trans) \ 1486 (((struct nft_trans_obj *)trans->data)->obj) 1487 #define nft_trans_obj_newobj(trans) \ 1488 (((struct nft_trans_obj *)trans->data)->newobj) 1489 #define nft_trans_obj_update(trans) \ 1490 (((struct nft_trans_obj *)trans->data)->update) 1491 1492 struct nft_trans_flowtable { 1493 struct nft_flowtable *flowtable; 1494 bool update; 1495 struct list_head hook_list; 1496 }; 1497 1498 #define nft_trans_flowtable(trans) \ 1499 (((struct nft_trans_flowtable *)trans->data)->flowtable) 1500 #define nft_trans_flowtable_update(trans) \ 1501 (((struct nft_trans_flowtable *)trans->data)->update) 1502 #define nft_trans_flowtable_hooks(trans) \ 1503 (((struct nft_trans_flowtable *)trans->data)->hook_list) 1504 1505 int __init nft_chain_filter_init(void); 1506 void nft_chain_filter_fini(void); 1507 1508 void __init nft_chain_route_init(void); 1509 void nft_chain_route_fini(void); 1510 1511 void nf_tables_trans_destroy_flush_work(void); 1512 #endif /* _NET_NF_TABLES_H */ 1513