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 #define NFT_MAX_HOOKS (NF_INET_INGRESS + 1) 18 19 struct module; 20 21 #define NFT_JUMP_STACK_SIZE 16 22 23 struct nft_pktinfo { 24 struct sk_buff *skb; 25 bool tprot_set; 26 u8 tprot; 27 /* for x_tables compatibility */ 28 struct xt_action_param xt; 29 }; 30 31 static inline struct net *nft_net(const struct nft_pktinfo *pkt) 32 { 33 return pkt->xt.state->net; 34 } 35 36 static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 37 { 38 return pkt->xt.state->hook; 39 } 40 41 static inline u8 nft_pf(const struct nft_pktinfo *pkt) 42 { 43 return pkt->xt.state->pf; 44 } 45 46 static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 47 { 48 return pkt->xt.state->in; 49 } 50 51 static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 52 { 53 return pkt->xt.state->out; 54 } 55 56 static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 57 struct sk_buff *skb, 58 const struct nf_hook_state *state) 59 { 60 pkt->skb = skb; 61 pkt->xt.state = state; 62 } 63 64 static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, 65 struct sk_buff *skb) 66 { 67 pkt->tprot_set = false; 68 pkt->tprot = 0; 69 pkt->xt.thoff = 0; 70 pkt->xt.fragoff = 0; 71 } 72 73 /** 74 * struct nft_verdict - nf_tables verdict 75 * 76 * @code: nf_tables/netfilter verdict code 77 * @chain: destination chain for NFT_JUMP/NFT_GOTO 78 */ 79 struct nft_verdict { 80 u32 code; 81 struct nft_chain *chain; 82 }; 83 84 struct nft_data { 85 union { 86 u32 data[4]; 87 struct nft_verdict verdict; 88 }; 89 } __attribute__((aligned(__alignof__(u64)))); 90 91 /** 92 * struct nft_regs - nf_tables register set 93 * 94 * @data: data registers 95 * @verdict: verdict register 96 * 97 * The first four data registers alias to the verdict register. 98 */ 99 struct nft_regs { 100 union { 101 u32 data[20]; 102 struct nft_verdict verdict; 103 }; 104 }; 105 106 /* Store/load an u8, u16 or u64 integer to/from the u32 data register. 107 * 108 * Note, when using concatenations, register allocation happens at 32-bit 109 * level. So for store instruction, pad the rest part with zero to avoid 110 * garbage values. 111 */ 112 113 static inline void nft_reg_store8(u32 *dreg, u8 val) 114 { 115 *dreg = 0; 116 *(u8 *)dreg = val; 117 } 118 119 static inline u8 nft_reg_load8(const u32 *sreg) 120 { 121 return *(u8 *)sreg; 122 } 123 124 static inline void nft_reg_store16(u32 *dreg, u16 val) 125 { 126 *dreg = 0; 127 *(u16 *)dreg = val; 128 } 129 130 static inline u16 nft_reg_load16(const u32 *sreg) 131 { 132 return *(u16 *)sreg; 133 } 134 135 static inline void nft_reg_store64(u32 *dreg, u64 val) 136 { 137 put_unaligned(val, (u64 *)dreg); 138 } 139 140 static inline u64 nft_reg_load64(const u32 *sreg) 141 { 142 return get_unaligned((u64 *)sreg); 143 } 144 145 static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 146 unsigned int len) 147 { 148 if (len % NFT_REG32_SIZE) 149 dst[len / NFT_REG32_SIZE] = 0; 150 memcpy(dst, src, len); 151 } 152 153 /** 154 * struct nft_ctx - nf_tables rule/set context 155 * 156 * @net: net namespace 157 * @table: the table the chain is contained in 158 * @chain: the chain the rule is contained in 159 * @nla: netlink attributes 160 * @portid: netlink portID of the original message 161 * @seq: netlink sequence number 162 * @family: protocol family 163 * @level: depth of the chains 164 * @report: notify via unicast netlink message 165 */ 166 struct nft_ctx { 167 struct net *net; 168 struct nft_table *table; 169 struct nft_chain *chain; 170 const struct nlattr * const *nla; 171 u32 portid; 172 u32 seq; 173 u16 flags; 174 u8 family; 175 u8 level; 176 bool report; 177 }; 178 179 struct nft_data_desc { 180 enum nft_data_types type; 181 unsigned int len; 182 }; 183 184 int nft_data_init(const struct nft_ctx *ctx, 185 struct nft_data *data, unsigned int size, 186 struct nft_data_desc *desc, const struct nlattr *nla); 187 void nft_data_hold(const struct nft_data *data, enum nft_data_types type); 188 void nft_data_release(const struct nft_data *data, enum nft_data_types type); 189 int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 190 enum nft_data_types type, unsigned int len); 191 192 static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 193 { 194 return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 195 } 196 197 static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 198 { 199 return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 200 } 201 202 int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 203 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 204 205 int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len); 206 int nft_parse_register_store(const struct nft_ctx *ctx, 207 const struct nlattr *attr, u8 *dreg, 208 const struct nft_data *data, 209 enum nft_data_types type, unsigned int len); 210 211 /** 212 * struct nft_userdata - user defined data associated with an object 213 * 214 * @len: length of the data 215 * @data: content 216 * 217 * The presence of user data is indicated in an object specific fashion, 218 * so a length of zero can't occur and the value "len" indicates data 219 * of length len + 1. 220 */ 221 struct nft_userdata { 222 u8 len; 223 unsigned char data[]; 224 }; 225 226 /** 227 * struct nft_set_elem - generic representation of set elements 228 * 229 * @key: element key 230 * @key_end: closing element key 231 * @priv: element private data and extensions 232 */ 233 struct nft_set_elem { 234 union { 235 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 236 struct nft_data val; 237 } key; 238 union { 239 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 240 struct nft_data val; 241 } key_end; 242 union { 243 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 244 struct nft_data val; 245 } data; 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 #define NFT_EXPR_MAXATTR 16 308 #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 309 ALIGN(size, __alignof__(struct nft_expr))) 310 311 /** 312 * struct nft_expr - nf_tables expression 313 * 314 * @ops: expression ops 315 * @data: expression private data 316 */ 317 struct nft_expr { 318 const struct nft_expr_ops *ops; 319 unsigned char data[] 320 __attribute__((aligned(__alignof__(u64)))); 321 }; 322 323 static inline void *nft_expr_priv(const struct nft_expr *expr) 324 { 325 return (void *)expr->data; 326 } 327 328 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); 329 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 330 int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 331 const struct nft_expr *expr); 332 333 struct nft_set_ext; 334 335 /** 336 * struct nft_set_ops - nf_tables set operations 337 * 338 * @lookup: look up an element within the set 339 * @update: update an element if exists, add it if doesn't exist 340 * @delete: delete an element 341 * @insert: insert new element into set 342 * @activate: activate new element in the next generation 343 * @deactivate: lookup for element and deactivate it in the next generation 344 * @flush: deactivate element in the next generation 345 * @remove: remove element from set 346 * @walk: iterate over all set elements 347 * @get: get set elements 348 * @privsize: function to return size of set private data 349 * @init: initialize private data of new set instance 350 * @destroy: destroy private data of set instance 351 * @elemsize: element private size 352 * 353 * Operations lookup, update and delete have simpler interfaces, are faster 354 * and currently only used in the packet path. All the rest are slower, 355 * control plane functions. 356 */ 357 struct nft_set_ops { 358 bool (*lookup)(const struct net *net, 359 const struct nft_set *set, 360 const u32 *key, 361 const struct nft_set_ext **ext); 362 bool (*update)(struct nft_set *set, 363 const u32 *key, 364 void *(*new)(struct nft_set *, 365 const struct nft_expr *, 366 struct nft_regs *), 367 const struct nft_expr *expr, 368 struct nft_regs *regs, 369 const struct nft_set_ext **ext); 370 bool (*delete)(const struct nft_set *set, 371 const u32 *key); 372 373 int (*insert)(const struct net *net, 374 const struct nft_set *set, 375 const struct nft_set_elem *elem, 376 struct nft_set_ext **ext); 377 void (*activate)(const struct net *net, 378 const struct nft_set *set, 379 const struct nft_set_elem *elem); 380 void * (*deactivate)(const struct net *net, 381 const struct nft_set *set, 382 const struct nft_set_elem *elem); 383 bool (*flush)(const struct net *net, 384 const struct nft_set *set, 385 void *priv); 386 void (*remove)(const struct net *net, 387 const struct nft_set *set, 388 const struct nft_set_elem *elem); 389 void (*walk)(const struct nft_ctx *ctx, 390 struct nft_set *set, 391 struct nft_set_iter *iter); 392 void * (*get)(const struct net *net, 393 const struct nft_set *set, 394 const struct nft_set_elem *elem, 395 unsigned int flags); 396 397 u64 (*privsize)(const struct nlattr * const nla[], 398 const struct nft_set_desc *desc); 399 bool (*estimate)(const struct nft_set_desc *desc, 400 u32 features, 401 struct nft_set_estimate *est); 402 int (*init)(const struct nft_set *set, 403 const struct nft_set_desc *desc, 404 const struct nlattr * const nla[]); 405 void (*destroy)(const struct nft_set *set); 406 void (*gc_init)(const struct nft_set *set); 407 408 unsigned int elemsize; 409 }; 410 411 /** 412 * struct nft_set_type - nf_tables set type 413 * 414 * @ops: set ops for this type 415 * @features: features supported by the implementation 416 */ 417 struct nft_set_type { 418 const struct nft_set_ops ops; 419 u32 features; 420 }; 421 #define to_set_type(o) container_of(o, struct nft_set_type, ops) 422 423 struct nft_set_elem_expr { 424 u8 size; 425 unsigned char data[] 426 __attribute__((aligned(__alignof__(struct nft_expr)))); 427 }; 428 429 #define nft_setelem_expr_at(__elem_expr, __offset) \ 430 ((struct nft_expr *)&__elem_expr->data[__offset]) 431 432 #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ 433 for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ 434 __size < (__elem_expr)->size; \ 435 __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) 436 437 #define NFT_SET_EXPR_MAX 2 438 439 /** 440 * struct nft_set - nf_tables set instance 441 * 442 * @list: table set list node 443 * @bindings: list of set bindings 444 * @table: table this set belongs to 445 * @net: netnamespace this set belongs to 446 * @name: name of the set 447 * @handle: unique handle of the set 448 * @ktype: key type (numeric type defined by userspace, not used in the kernel) 449 * @dtype: data type (verdict or numeric type defined by userspace) 450 * @objtype: object type (see NFT_OBJECT_* definitions) 451 * @size: maximum set size 452 * @field_len: length of each field in concatenation, bytes 453 * @field_count: number of concatenated fields in element 454 * @use: number of rules references to this set 455 * @nelems: number of elements 456 * @ndeact: number of deactivated elements queued for removal 457 * @timeout: default timeout value in jiffies 458 * @gc_int: garbage collection interval in msecs 459 * @policy: set parameterization (see enum nft_set_policies) 460 * @udlen: user data length 461 * @udata: user data 462 * @expr: stateful expression 463 * @ops: set ops 464 * @flags: set flags 465 * @genmask: generation mask 466 * @klen: key length 467 * @dlen: data length 468 * @data: private set data 469 */ 470 struct nft_set { 471 struct list_head list; 472 struct list_head bindings; 473 struct nft_table *table; 474 possible_net_t net; 475 char *name; 476 u64 handle; 477 u32 ktype; 478 u32 dtype; 479 u32 objtype; 480 u32 size; 481 u8 field_len[NFT_REG32_COUNT]; 482 u8 field_count; 483 u32 use; 484 atomic_t nelems; 485 u32 ndeact; 486 u64 timeout; 487 u32 gc_int; 488 u16 policy; 489 u16 udlen; 490 unsigned char *udata; 491 /* runtime data below here */ 492 const struct nft_set_ops *ops ____cacheline_aligned; 493 u16 flags:14, 494 genmask:2; 495 u8 klen; 496 u8 dlen; 497 u8 num_exprs; 498 struct nft_expr *exprs[NFT_SET_EXPR_MAX]; 499 unsigned char data[] 500 __attribute__((aligned(__alignof__(u64)))); 501 }; 502 503 static inline bool nft_set_is_anonymous(const struct nft_set *set) 504 { 505 return set->flags & NFT_SET_ANONYMOUS; 506 } 507 508 static inline void *nft_set_priv(const struct nft_set *set) 509 { 510 return (void *)set->data; 511 } 512 513 static inline struct nft_set *nft_set_container_of(const void *priv) 514 { 515 return (void *)priv - offsetof(struct nft_set, data); 516 } 517 518 struct nft_set *nft_set_lookup_global(const struct net *net, 519 const struct nft_table *table, 520 const struct nlattr *nla_set_name, 521 const struct nlattr *nla_set_id, 522 u8 genmask); 523 524 static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 525 { 526 return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 527 } 528 529 /** 530 * struct nft_set_binding - nf_tables set binding 531 * 532 * @list: set bindings list node 533 * @chain: chain containing the rule bound to the set 534 * @flags: set action flags 535 * 536 * A set binding contains all information necessary for validation 537 * of new elements added to a bound set. 538 */ 539 struct nft_set_binding { 540 struct list_head list; 541 const struct nft_chain *chain; 542 u32 flags; 543 }; 544 545 enum nft_trans_phase; 546 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, 547 struct nft_set_binding *binding, 548 enum nft_trans_phase phase); 549 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 550 struct nft_set_binding *binding); 551 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); 552 553 /** 554 * enum nft_set_extensions - set extension type IDs 555 * 556 * @NFT_SET_EXT_KEY: element key 557 * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges 558 * @NFT_SET_EXT_DATA: mapping data 559 * @NFT_SET_EXT_FLAGS: element flags 560 * @NFT_SET_EXT_TIMEOUT: element timeout 561 * @NFT_SET_EXT_EXPIRATION: element expiration time 562 * @NFT_SET_EXT_USERDATA: user data associated with the element 563 * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element 564 * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 565 * @NFT_SET_EXT_NUM: number of extension types 566 */ 567 enum nft_set_extensions { 568 NFT_SET_EXT_KEY, 569 NFT_SET_EXT_KEY_END, 570 NFT_SET_EXT_DATA, 571 NFT_SET_EXT_FLAGS, 572 NFT_SET_EXT_TIMEOUT, 573 NFT_SET_EXT_EXPIRATION, 574 NFT_SET_EXT_USERDATA, 575 NFT_SET_EXT_EXPRESSIONS, 576 NFT_SET_EXT_OBJREF, 577 NFT_SET_EXT_NUM 578 }; 579 580 /** 581 * struct nft_set_ext_type - set extension type 582 * 583 * @len: fixed part length of the extension 584 * @align: alignment requirements of the extension 585 */ 586 struct nft_set_ext_type { 587 u8 len; 588 u8 align; 589 }; 590 591 extern const struct nft_set_ext_type nft_set_ext_types[]; 592 593 /** 594 * struct nft_set_ext_tmpl - set extension template 595 * 596 * @len: length of extension area 597 * @offset: offsets of individual extension types 598 */ 599 struct nft_set_ext_tmpl { 600 u16 len; 601 u8 offset[NFT_SET_EXT_NUM]; 602 }; 603 604 /** 605 * struct nft_set_ext - set extensions 606 * 607 * @genmask: generation mask 608 * @offset: offsets of individual extension types 609 * @data: beginning of extension data 610 */ 611 struct nft_set_ext { 612 u8 genmask; 613 u8 offset[NFT_SET_EXT_NUM]; 614 char data[]; 615 }; 616 617 static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 618 { 619 memset(tmpl, 0, sizeof(*tmpl)); 620 tmpl->len = sizeof(struct nft_set_ext); 621 } 622 623 static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 624 unsigned int len) 625 { 626 tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 627 BUG_ON(tmpl->len > U8_MAX); 628 tmpl->offset[id] = tmpl->len; 629 tmpl->len += nft_set_ext_types[id].len + len; 630 } 631 632 static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 633 { 634 nft_set_ext_add_length(tmpl, id, 0); 635 } 636 637 static inline void nft_set_ext_init(struct nft_set_ext *ext, 638 const struct nft_set_ext_tmpl *tmpl) 639 { 640 memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 641 } 642 643 static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 644 { 645 return !!ext->offset[id]; 646 } 647 648 static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 649 { 650 return ext && __nft_set_ext_exists(ext, id); 651 } 652 653 static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 654 { 655 return (void *)ext + ext->offset[id]; 656 } 657 658 static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 659 { 660 return nft_set_ext(ext, NFT_SET_EXT_KEY); 661 } 662 663 static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) 664 { 665 return nft_set_ext(ext, NFT_SET_EXT_KEY_END); 666 } 667 668 static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 669 { 670 return nft_set_ext(ext, NFT_SET_EXT_DATA); 671 } 672 673 static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 674 { 675 return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 676 } 677 678 static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 679 { 680 return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 681 } 682 683 static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) 684 { 685 return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 686 } 687 688 static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 689 { 690 return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 691 } 692 693 static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 694 { 695 return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); 696 } 697 698 static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 699 { 700 return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 701 time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); 702 } 703 704 static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 705 void *elem) 706 { 707 return elem + set->ops->elemsize; 708 } 709 710 static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 711 { 712 return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 713 } 714 715 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, 716 const struct nft_set *set, 717 const struct nlattr *attr); 718 719 void *nft_set_elem_init(const struct nft_set *set, 720 const struct nft_set_ext_tmpl *tmpl, 721 const u32 *key, const u32 *key_end, const u32 *data, 722 u64 timeout, u64 expiration, gfp_t gfp); 723 int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, 724 struct nft_expr *expr_array[]); 725 void nft_set_elem_destroy(const struct nft_set *set, void *elem, 726 bool destroy_expr); 727 728 /** 729 * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 730 * 731 * @rcu: rcu head 732 * @set: set the elements belong to 733 * @cnt: count of elements 734 */ 735 struct nft_set_gc_batch_head { 736 struct rcu_head rcu; 737 const struct nft_set *set; 738 unsigned int cnt; 739 }; 740 741 #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 742 sizeof(struct nft_set_gc_batch_head)) / \ 743 sizeof(void *)) 744 745 /** 746 * struct nft_set_gc_batch - nf_tables set garbage collection batch 747 * 748 * @head: GC batch head 749 * @elems: garbage collection elements 750 */ 751 struct nft_set_gc_batch { 752 struct nft_set_gc_batch_head head; 753 void *elems[NFT_SET_GC_BATCH_SIZE]; 754 }; 755 756 struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 757 gfp_t gfp); 758 void nft_set_gc_batch_release(struct rcu_head *rcu); 759 760 static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 761 { 762 if (gcb != NULL) 763 call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 764 } 765 766 static inline struct nft_set_gc_batch * 767 nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 768 gfp_t gfp) 769 { 770 if (gcb != NULL) { 771 if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 772 return gcb; 773 nft_set_gc_batch_complete(gcb); 774 } 775 return nft_set_gc_batch_alloc(set, gfp); 776 } 777 778 static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 779 void *elem) 780 { 781 gcb->elems[gcb->head.cnt++] = elem; 782 } 783 784 struct nft_expr_ops; 785 /** 786 * struct nft_expr_type - nf_tables expression type 787 * 788 * @select_ops: function to select nft_expr_ops 789 * @release_ops: release nft_expr_ops 790 * @ops: default ops, used when no select_ops functions is present 791 * @list: used internally 792 * @name: Identifier 793 * @owner: module reference 794 * @policy: netlink attribute policy 795 * @maxattr: highest netlink attribute number 796 * @family: address family for AF-specific types 797 * @flags: expression type flags 798 */ 799 struct nft_expr_type { 800 const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 801 const struct nlattr * const tb[]); 802 void (*release_ops)(const struct nft_expr_ops *ops); 803 const struct nft_expr_ops *ops; 804 struct list_head list; 805 const char *name; 806 struct module *owner; 807 const struct nla_policy *policy; 808 unsigned int maxattr; 809 u8 family; 810 u8 flags; 811 }; 812 813 #define NFT_EXPR_STATEFUL 0x1 814 #define NFT_EXPR_GC 0x2 815 816 enum nft_trans_phase { 817 NFT_TRANS_PREPARE, 818 NFT_TRANS_ABORT, 819 NFT_TRANS_COMMIT, 820 NFT_TRANS_RELEASE 821 }; 822 823 struct nft_flow_rule; 824 struct nft_offload_ctx; 825 826 /** 827 * struct nft_expr_ops - nf_tables expression operations 828 * 829 * @eval: Expression evaluation function 830 * @size: full expression size, including private data size 831 * @init: initialization function 832 * @activate: activate expression in the next generation 833 * @deactivate: deactivate expression in next generation 834 * @destroy: destruction function, called after synchronize_rcu 835 * @dump: function to dump parameters 836 * @type: expression type 837 * @validate: validate expression, called during loop detection 838 * @data: extra data to attach to this expression operation 839 */ 840 struct nft_expr_ops { 841 void (*eval)(const struct nft_expr *expr, 842 struct nft_regs *regs, 843 const struct nft_pktinfo *pkt); 844 int (*clone)(struct nft_expr *dst, 845 const struct nft_expr *src); 846 unsigned int size; 847 848 int (*init)(const struct nft_ctx *ctx, 849 const struct nft_expr *expr, 850 const struct nlattr * const tb[]); 851 void (*activate)(const struct nft_ctx *ctx, 852 const struct nft_expr *expr); 853 void (*deactivate)(const struct nft_ctx *ctx, 854 const struct nft_expr *expr, 855 enum nft_trans_phase phase); 856 void (*destroy)(const struct nft_ctx *ctx, 857 const struct nft_expr *expr); 858 void (*destroy_clone)(const struct nft_ctx *ctx, 859 const struct nft_expr *expr); 860 int (*dump)(struct sk_buff *skb, 861 const struct nft_expr *expr); 862 int (*validate)(const struct nft_ctx *ctx, 863 const struct nft_expr *expr, 864 const struct nft_data **data); 865 bool (*gc)(struct net *net, 866 const struct nft_expr *expr); 867 int (*offload)(struct nft_offload_ctx *ctx, 868 struct nft_flow_rule *flow, 869 const struct nft_expr *expr); 870 u32 offload_flags; 871 const struct nft_expr_type *type; 872 void *data; 873 }; 874 875 /** 876 * struct nft_rule - nf_tables rule 877 * 878 * @list: used internally 879 * @handle: rule handle 880 * @genmask: generation mask 881 * @dlen: length of expression data 882 * @udata: user data is appended to the rule 883 * @data: expression data 884 */ 885 struct nft_rule { 886 struct list_head list; 887 u64 handle:42, 888 genmask:2, 889 dlen:12, 890 udata:1; 891 unsigned char data[] 892 __attribute__((aligned(__alignof__(struct nft_expr)))); 893 }; 894 895 static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 896 { 897 return (struct nft_expr *)&rule->data[0]; 898 } 899 900 static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 901 { 902 return ((void *)expr) + expr->ops->size; 903 } 904 905 static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 906 { 907 return (struct nft_expr *)&rule->data[rule->dlen]; 908 } 909 910 static inline bool nft_expr_more(const struct nft_rule *rule, 911 const struct nft_expr *expr) 912 { 913 return expr != nft_expr_last(rule) && expr->ops; 914 } 915 916 static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 917 { 918 return (void *)&rule->data[rule->dlen]; 919 } 920 921 void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule); 922 923 static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, 924 struct nft_regs *regs, 925 const struct nft_pktinfo *pkt) 926 { 927 struct nft_set_elem_expr *elem_expr; 928 struct nft_expr *expr; 929 u32 size; 930 931 if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { 932 elem_expr = nft_set_ext_expr(ext); 933 nft_setelem_expr_foreach(expr, elem_expr, size) { 934 expr->ops->eval(expr, regs, pkt); 935 if (regs->verdict.code == NFT_BREAK) 936 return; 937 } 938 } 939 } 940 941 /* 942 * The last pointer isn't really necessary, but the compiler isn't able to 943 * determine that the result of nft_expr_last() is always the same since it 944 * can't assume that the dlen value wasn't changed within calls in the loop. 945 */ 946 #define nft_rule_for_each_expr(expr, last, rule) \ 947 for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 948 (expr) != (last); \ 949 (expr) = nft_expr_next(expr)) 950 951 #define NFT_CHAIN_POLICY_UNSET U8_MAX 952 953 /** 954 * struct nft_chain - nf_tables chain 955 * 956 * @rules: list of rules in the chain 957 * @list: used internally 958 * @rhlhead: used internally 959 * @table: table that this chain belongs to 960 * @handle: chain handle 961 * @use: number of jump references to this chain 962 * @flags: bitmask of enum nft_chain_flags 963 * @name: name of the chain 964 */ 965 struct nft_chain { 966 struct nft_rule *__rcu *rules_gen_0; 967 struct nft_rule *__rcu *rules_gen_1; 968 struct list_head rules; 969 struct list_head list; 970 struct rhlist_head rhlhead; 971 struct nft_table *table; 972 u64 handle; 973 u32 use; 974 u8 flags:5, 975 bound:1, 976 genmask:2; 977 char *name; 978 u16 udlen; 979 u8 *udata; 980 981 /* Only used during control plane commit phase: */ 982 struct nft_rule **rules_next; 983 }; 984 985 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); 986 987 enum nft_chain_types { 988 NFT_CHAIN_T_DEFAULT = 0, 989 NFT_CHAIN_T_ROUTE, 990 NFT_CHAIN_T_NAT, 991 NFT_CHAIN_T_MAX 992 }; 993 994 /** 995 * struct nft_chain_type - nf_tables chain type info 996 * 997 * @name: name of the type 998 * @type: numeric identifier 999 * @family: address family 1000 * @owner: module owner 1001 * @hook_mask: mask of valid hooks 1002 * @hooks: array of hook functions 1003 * @ops_register: base chain register function 1004 * @ops_unregister: base chain unregister function 1005 */ 1006 struct nft_chain_type { 1007 const char *name; 1008 enum nft_chain_types type; 1009 int family; 1010 struct module *owner; 1011 unsigned int hook_mask; 1012 nf_hookfn *hooks[NFT_MAX_HOOKS]; 1013 int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); 1014 void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); 1015 }; 1016 1017 int nft_chain_validate_dependency(const struct nft_chain *chain, 1018 enum nft_chain_types type); 1019 int nft_chain_validate_hooks(const struct nft_chain *chain, 1020 unsigned int hook_flags); 1021 1022 static inline bool nft_chain_is_bound(struct nft_chain *chain) 1023 { 1024 return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; 1025 } 1026 1027 void nft_chain_del(struct nft_chain *chain); 1028 void nf_tables_chain_destroy(struct nft_ctx *ctx); 1029 1030 struct nft_stats { 1031 u64 bytes; 1032 u64 pkts; 1033 struct u64_stats_sync syncp; 1034 }; 1035 1036 struct nft_hook { 1037 struct list_head list; 1038 bool inactive; 1039 struct nf_hook_ops ops; 1040 struct rcu_head rcu; 1041 }; 1042 1043 /** 1044 * struct nft_base_chain - nf_tables base chain 1045 * 1046 * @ops: netfilter hook ops 1047 * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) 1048 * @type: chain type 1049 * @policy: default policy 1050 * @stats: per-cpu chain stats 1051 * @chain: the chain 1052 * @flow_block: flow block (for hardware offload) 1053 */ 1054 struct nft_base_chain { 1055 struct nf_hook_ops ops; 1056 struct list_head hook_list; 1057 const struct nft_chain_type *type; 1058 u8 policy; 1059 u8 flags; 1060 struct nft_stats __percpu *stats; 1061 struct nft_chain chain; 1062 struct flow_block flow_block; 1063 }; 1064 1065 static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 1066 { 1067 return container_of(chain, struct nft_base_chain, chain); 1068 } 1069 1070 static inline bool nft_is_base_chain(const struct nft_chain *chain) 1071 { 1072 return chain->flags & NFT_CHAIN_BASE; 1073 } 1074 1075 int __nft_release_basechain(struct nft_ctx *ctx); 1076 1077 unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 1078 1079 /** 1080 * struct nft_table - nf_tables table 1081 * 1082 * @list: used internally 1083 * @chains_ht: chains in the table 1084 * @chains: same, for stable walks 1085 * @sets: sets in the table 1086 * @objects: stateful objects in the table 1087 * @flowtables: flow tables in the table 1088 * @hgenerator: handle generator state 1089 * @handle: table handle 1090 * @use: number of chain references to this table 1091 * @flags: table flag (see enum nft_table_flags) 1092 * @genmask: generation mask 1093 * @afinfo: address family info 1094 * @name: name of the table 1095 */ 1096 struct nft_table { 1097 struct list_head list; 1098 struct rhltable chains_ht; 1099 struct list_head chains; 1100 struct list_head sets; 1101 struct list_head objects; 1102 struct list_head flowtables; 1103 u64 hgenerator; 1104 u64 handle; 1105 u32 use; 1106 u16 family:6, 1107 flags:8, 1108 genmask:2; 1109 u32 nlpid; 1110 char *name; 1111 u16 udlen; 1112 u8 *udata; 1113 }; 1114 1115 static inline bool nft_table_has_owner(const struct nft_table *table) 1116 { 1117 return table->flags & NFT_TABLE_F_OWNER; 1118 } 1119 1120 static inline bool nft_base_chain_netdev(int family, u32 hooknum) 1121 { 1122 return family == NFPROTO_NETDEV || 1123 (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); 1124 } 1125 1126 void nft_register_chain_type(const struct nft_chain_type *); 1127 void nft_unregister_chain_type(const struct nft_chain_type *); 1128 1129 int nft_register_expr(struct nft_expr_type *); 1130 void nft_unregister_expr(struct nft_expr_type *); 1131 1132 int nft_verdict_dump(struct sk_buff *skb, int type, 1133 const struct nft_verdict *v); 1134 1135 /** 1136 * struct nft_object_hash_key - key to lookup nft_object 1137 * 1138 * @name: name of the stateful object to look up 1139 * @table: table the object belongs to 1140 */ 1141 struct nft_object_hash_key { 1142 const char *name; 1143 const struct nft_table *table; 1144 }; 1145 1146 /** 1147 * struct nft_object - nf_tables stateful object 1148 * 1149 * @list: table stateful object list node 1150 * @key: keys that identify this object 1151 * @rhlhead: nft_objname_ht node 1152 * @genmask: generation mask 1153 * @use: number of references to this stateful object 1154 * @handle: unique object handle 1155 * @ops: object operations 1156 * @data: object data, layout depends on type 1157 */ 1158 struct nft_object { 1159 struct list_head list; 1160 struct rhlist_head rhlhead; 1161 struct nft_object_hash_key key; 1162 u32 genmask:2, 1163 use:30; 1164 u64 handle; 1165 u16 udlen; 1166 u8 *udata; 1167 /* runtime data below here */ 1168 const struct nft_object_ops *ops ____cacheline_aligned; 1169 unsigned char data[] 1170 __attribute__((aligned(__alignof__(u64)))); 1171 }; 1172 1173 static inline void *nft_obj_data(const struct nft_object *obj) 1174 { 1175 return (void *)obj->data; 1176 } 1177 1178 #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1179 1180 struct nft_object *nft_obj_lookup(const struct net *net, 1181 const struct nft_table *table, 1182 const struct nlattr *nla, u32 objtype, 1183 u8 genmask); 1184 1185 void nft_obj_notify(struct net *net, const struct nft_table *table, 1186 struct nft_object *obj, u32 portid, u32 seq, 1187 int event, int family, int report, gfp_t gfp); 1188 1189 /** 1190 * struct nft_object_type - stateful object type 1191 * 1192 * @select_ops: function to select nft_object_ops 1193 * @ops: default ops, used when no select_ops functions is present 1194 * @list: list node in list of object types 1195 * @type: stateful object numeric type 1196 * @owner: module owner 1197 * @maxattr: maximum netlink attribute 1198 * @policy: netlink attribute policy 1199 */ 1200 struct nft_object_type { 1201 const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, 1202 const struct nlattr * const tb[]); 1203 const struct nft_object_ops *ops; 1204 struct list_head list; 1205 u32 type; 1206 unsigned int maxattr; 1207 struct module *owner; 1208 const struct nla_policy *policy; 1209 }; 1210 1211 /** 1212 * struct nft_object_ops - stateful object operations 1213 * 1214 * @eval: stateful object evaluation function 1215 * @size: stateful object size 1216 * @init: initialize object from netlink attributes 1217 * @destroy: release existing stateful object 1218 * @dump: netlink dump stateful object 1219 * @update: update stateful object 1220 */ 1221 struct nft_object_ops { 1222 void (*eval)(struct nft_object *obj, 1223 struct nft_regs *regs, 1224 const struct nft_pktinfo *pkt); 1225 unsigned int size; 1226 int (*init)(const struct nft_ctx *ctx, 1227 const struct nlattr *const tb[], 1228 struct nft_object *obj); 1229 void (*destroy)(const struct nft_ctx *ctx, 1230 struct nft_object *obj); 1231 int (*dump)(struct sk_buff *skb, 1232 struct nft_object *obj, 1233 bool reset); 1234 void (*update)(struct nft_object *obj, 1235 struct nft_object *newobj); 1236 const struct nft_object_type *type; 1237 }; 1238 1239 int nft_register_obj(struct nft_object_type *obj_type); 1240 void nft_unregister_obj(struct nft_object_type *obj_type); 1241 1242 #define NFT_NETDEVICE_MAX 256 1243 1244 /** 1245 * struct nft_flowtable - nf_tables flow table 1246 * 1247 * @list: flow table list node in table list 1248 * @table: the table the flow table is contained in 1249 * @name: name of this flow table 1250 * @hooknum: hook number 1251 * @ops_len: number of hooks in array 1252 * @genmask: generation mask 1253 * @use: number of references to this flow table 1254 * @handle: unique object handle 1255 * @dev_name: array of device names 1256 * @data: rhashtable and garbage collector 1257 * @ops: array of hooks 1258 */ 1259 struct nft_flowtable { 1260 struct list_head list; 1261 struct nft_table *table; 1262 char *name; 1263 int hooknum; 1264 int ops_len; 1265 u32 genmask:2, 1266 use:30; 1267 u64 handle; 1268 /* runtime data below here */ 1269 struct list_head hook_list ____cacheline_aligned; 1270 struct nf_flowtable data; 1271 }; 1272 1273 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, 1274 const struct nlattr *nla, 1275 u8 genmask); 1276 1277 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, 1278 struct nft_flowtable *flowtable, 1279 enum nft_trans_phase phase); 1280 1281 void nft_register_flowtable_type(struct nf_flowtable_type *type); 1282 void nft_unregister_flowtable_type(struct nf_flowtable_type *type); 1283 1284 /** 1285 * struct nft_traceinfo - nft tracing information and state 1286 * 1287 * @pkt: pktinfo currently processed 1288 * @basechain: base chain currently processed 1289 * @chain: chain currently processed 1290 * @rule: rule that was evaluated 1291 * @verdict: verdict given by rule 1292 * @type: event type (enum nft_trace_types) 1293 * @packet_dumped: packet headers sent in a previous traceinfo message 1294 * @trace: other struct members are initialised 1295 */ 1296 struct nft_traceinfo { 1297 const struct nft_pktinfo *pkt; 1298 const struct nft_base_chain *basechain; 1299 const struct nft_chain *chain; 1300 const struct nft_rule *rule; 1301 const struct nft_verdict *verdict; 1302 enum nft_trace_types type; 1303 bool packet_dumped; 1304 bool trace; 1305 }; 1306 1307 void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 1308 const struct nft_verdict *verdict, 1309 const struct nft_chain *basechain); 1310 1311 void nft_trace_notify(struct nft_traceinfo *info); 1312 1313 #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 1314 MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 1315 1316 #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 1317 MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 1318 1319 #define MODULE_ALIAS_NFT_EXPR(name) \ 1320 MODULE_ALIAS("nft-expr-" name) 1321 1322 #define MODULE_ALIAS_NFT_OBJ(type) \ 1323 MODULE_ALIAS("nft-obj-" __stringify(type)) 1324 1325 #if IS_ENABLED(CONFIG_NF_TABLES) 1326 1327 /* 1328 * The gencursor defines two generations, the currently active and the 1329 * next one. Objects contain a bitmask of 2 bits specifying the generations 1330 * they're active in. A set bit means they're inactive in the generation 1331 * represented by that bit. 1332 * 1333 * New objects start out as inactive in the current and active in the 1334 * next generation. When committing the ruleset the bitmask is cleared, 1335 * meaning they're active in all generations. When removing an object, 1336 * it is set inactive in the next generation. After committing the ruleset, 1337 * the objects are removed. 1338 */ 1339 static inline unsigned int nft_gencursor_next(const struct net *net) 1340 { 1341 return net->nft.gencursor + 1 == 1 ? 1 : 0; 1342 } 1343 1344 static inline u8 nft_genmask_next(const struct net *net) 1345 { 1346 return 1 << nft_gencursor_next(net); 1347 } 1348 1349 static inline u8 nft_genmask_cur(const struct net *net) 1350 { 1351 /* Use READ_ONCE() to prevent refetching the value for atomicity */ 1352 return 1 << READ_ONCE(net->nft.gencursor); 1353 } 1354 1355 #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 1356 1357 /* 1358 * Generic transaction helpers 1359 */ 1360 1361 /* Check if this object is currently active. */ 1362 #define nft_is_active(__net, __obj) \ 1363 (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1364 1365 /* Check if this object is active in the next generation. */ 1366 #define nft_is_active_next(__net, __obj) \ 1367 (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1368 1369 /* This object becomes active in the next generation. */ 1370 #define nft_activate_next(__net, __obj) \ 1371 (__obj)->genmask = nft_genmask_cur(__net) 1372 1373 /* This object becomes inactive in the next generation. */ 1374 #define nft_deactivate_next(__net, __obj) \ 1375 (__obj)->genmask = nft_genmask_next(__net) 1376 1377 /* After committing the ruleset, clear the stale generation bit. */ 1378 #define nft_clear(__net, __obj) \ 1379 (__obj)->genmask &= ~nft_genmask_next(__net) 1380 #define nft_active_genmask(__obj, __genmask) \ 1381 !((__obj)->genmask & __genmask) 1382 1383 /* 1384 * Set element transaction helpers 1385 */ 1386 1387 static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1388 u8 genmask) 1389 { 1390 return !(ext->genmask & genmask); 1391 } 1392 1393 static inline void nft_set_elem_change_active(const struct net *net, 1394 const struct nft_set *set, 1395 struct nft_set_ext *ext) 1396 { 1397 ext->genmask ^= nft_genmask_next(net); 1398 } 1399 1400 #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ 1401 1402 /* 1403 * We use a free bit in the genmask field to indicate the element 1404 * is busy, meaning it is currently being processed either by 1405 * the netlink API or GC. 1406 * 1407 * Even though the genmask is only a single byte wide, this works 1408 * because the extension structure if fully constant once initialized, 1409 * so there are no non-atomic write accesses unless it is already 1410 * marked busy. 1411 */ 1412 #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 1413 1414 #if defined(__LITTLE_ENDIAN_BITFIELD) 1415 #define NFT_SET_ELEM_BUSY_BIT 2 1416 #elif defined(__BIG_ENDIAN_BITFIELD) 1417 #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 1418 #else 1419 #error 1420 #endif 1421 1422 static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 1423 { 1424 unsigned long *word = (unsigned long *)ext; 1425 1426 BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 1427 return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 1428 } 1429 1430 static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 1431 { 1432 unsigned long *word = (unsigned long *)ext; 1433 1434 clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 1435 } 1436 1437 /** 1438 * struct nft_trans - nf_tables object update in transaction 1439 * 1440 * @list: used internally 1441 * @msg_type: message type 1442 * @put_net: ctx->net needs to be put 1443 * @ctx: transaction context 1444 * @data: internal information related to the transaction 1445 */ 1446 struct nft_trans { 1447 struct list_head list; 1448 int msg_type; 1449 bool put_net; 1450 struct nft_ctx ctx; 1451 char data[]; 1452 }; 1453 1454 struct nft_trans_rule { 1455 struct nft_rule *rule; 1456 struct nft_flow_rule *flow; 1457 u32 rule_id; 1458 }; 1459 1460 #define nft_trans_rule(trans) \ 1461 (((struct nft_trans_rule *)trans->data)->rule) 1462 #define nft_trans_flow_rule(trans) \ 1463 (((struct nft_trans_rule *)trans->data)->flow) 1464 #define nft_trans_rule_id(trans) \ 1465 (((struct nft_trans_rule *)trans->data)->rule_id) 1466 1467 struct nft_trans_set { 1468 struct nft_set *set; 1469 u32 set_id; 1470 bool bound; 1471 }; 1472 1473 #define nft_trans_set(trans) \ 1474 (((struct nft_trans_set *)trans->data)->set) 1475 #define nft_trans_set_id(trans) \ 1476 (((struct nft_trans_set *)trans->data)->set_id) 1477 #define nft_trans_set_bound(trans) \ 1478 (((struct nft_trans_set *)trans->data)->bound) 1479 1480 struct nft_trans_chain { 1481 bool update; 1482 char *name; 1483 struct nft_stats __percpu *stats; 1484 u8 policy; 1485 u32 chain_id; 1486 }; 1487 1488 #define nft_trans_chain_update(trans) \ 1489 (((struct nft_trans_chain *)trans->data)->update) 1490 #define nft_trans_chain_name(trans) \ 1491 (((struct nft_trans_chain *)trans->data)->name) 1492 #define nft_trans_chain_stats(trans) \ 1493 (((struct nft_trans_chain *)trans->data)->stats) 1494 #define nft_trans_chain_policy(trans) \ 1495 (((struct nft_trans_chain *)trans->data)->policy) 1496 #define nft_trans_chain_id(trans) \ 1497 (((struct nft_trans_chain *)trans->data)->chain_id) 1498 1499 struct nft_trans_table { 1500 bool update; 1501 bool enable; 1502 }; 1503 1504 #define nft_trans_table_update(trans) \ 1505 (((struct nft_trans_table *)trans->data)->update) 1506 #define nft_trans_table_enable(trans) \ 1507 (((struct nft_trans_table *)trans->data)->enable) 1508 1509 struct nft_trans_elem { 1510 struct nft_set *set; 1511 struct nft_set_elem elem; 1512 bool bound; 1513 }; 1514 1515 #define nft_trans_elem_set(trans) \ 1516 (((struct nft_trans_elem *)trans->data)->set) 1517 #define nft_trans_elem(trans) \ 1518 (((struct nft_trans_elem *)trans->data)->elem) 1519 #define nft_trans_elem_set_bound(trans) \ 1520 (((struct nft_trans_elem *)trans->data)->bound) 1521 1522 struct nft_trans_obj { 1523 struct nft_object *obj; 1524 struct nft_object *newobj; 1525 bool update; 1526 }; 1527 1528 #define nft_trans_obj(trans) \ 1529 (((struct nft_trans_obj *)trans->data)->obj) 1530 #define nft_trans_obj_newobj(trans) \ 1531 (((struct nft_trans_obj *)trans->data)->newobj) 1532 #define nft_trans_obj_update(trans) \ 1533 (((struct nft_trans_obj *)trans->data)->update) 1534 1535 struct nft_trans_flowtable { 1536 struct nft_flowtable *flowtable; 1537 bool update; 1538 struct list_head hook_list; 1539 }; 1540 1541 #define nft_trans_flowtable(trans) \ 1542 (((struct nft_trans_flowtable *)trans->data)->flowtable) 1543 #define nft_trans_flowtable_update(trans) \ 1544 (((struct nft_trans_flowtable *)trans->data)->update) 1545 #define nft_trans_flowtable_hooks(trans) \ 1546 (((struct nft_trans_flowtable *)trans->data)->hook_list) 1547 1548 int __init nft_chain_filter_init(void); 1549 void nft_chain_filter_fini(void); 1550 1551 void __init nft_chain_route_init(void); 1552 void nft_chain_route_fini(void); 1553 1554 void nf_tables_trans_destroy_flush_work(void); 1555 1556 int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); 1557 __be64 nf_jiffies64_to_msecs(u64 input); 1558 1559 #endif /* _NET_NF_TABLES_H */ 1560