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UBUNTU: Ubuntu-5.11.0-22.23
[mirror_ubuntu-hirsute-kernel.git] / include / net / netfilter / nf_tables.h
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 unsigned int nft_parse_register(const struct nlattr *attr);
204 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg);
205
206 int nft_validate_register_load(enum nft_registers reg, unsigned int len);
207 int nft_validate_register_store(const struct nft_ctx *ctx,
208 enum nft_registers reg,
209 const struct nft_data *data,
210 enum nft_data_types type, unsigned int len);
211
212 /**
213 * struct nft_userdata - user defined data associated with an object
214 *
215 * @len: length of the data
216 * @data: content
217 *
218 * The presence of user data is indicated in an object specific fashion,
219 * so a length of zero can't occur and the value "len" indicates data
220 * of length len + 1.
221 */
222 struct nft_userdata {
223 u8 len;
224 unsigned char data[];
225 };
226
227 /**
228 * struct nft_set_elem - generic representation of set elements
229 *
230 * @key: element key
231 * @key_end: closing element key
232 * @priv: element private data and extensions
233 */
234 struct nft_set_elem {
235 union {
236 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)];
237 struct nft_data val;
238 } key;
239 union {
240 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)];
241 struct nft_data val;
242 } key_end;
243 union {
244 u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)];
245 struct nft_data val;
246 } data;
247 void *priv;
248 };
249
250 struct nft_set;
251 struct nft_set_iter {
252 u8 genmask;
253 unsigned int count;
254 unsigned int skip;
255 int err;
256 int (*fn)(const struct nft_ctx *ctx,
257 struct nft_set *set,
258 const struct nft_set_iter *iter,
259 struct nft_set_elem *elem);
260 };
261
262 /**
263 * struct nft_set_desc - description of set elements
264 *
265 * @klen: key length
266 * @dlen: data length
267 * @size: number of set elements
268 * @field_len: length of each field in concatenation, bytes
269 * @field_count: number of concatenated fields in element
270 * @expr: set must support for expressions
271 */
272 struct nft_set_desc {
273 unsigned int klen;
274 unsigned int dlen;
275 unsigned int size;
276 u8 field_len[NFT_REG32_COUNT];
277 u8 field_count;
278 bool expr;
279 };
280
281 /**
282 * enum nft_set_class - performance class
283 *
284 * @NFT_LOOKUP_O_1: constant, O(1)
285 * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N)
286 * @NFT_LOOKUP_O_N: linear, O(N)
287 */
288 enum nft_set_class {
289 NFT_SET_CLASS_O_1,
290 NFT_SET_CLASS_O_LOG_N,
291 NFT_SET_CLASS_O_N,
292 };
293
294 /**
295 * struct nft_set_estimate - estimation of memory and performance
296 * characteristics
297 *
298 * @size: required memory
299 * @lookup: lookup performance class
300 * @space: memory class
301 */
302 struct nft_set_estimate {
303 u64 size;
304 enum nft_set_class lookup;
305 enum nft_set_class space;
306 };
307
308 #define NFT_EXPR_MAXATTR 16
309 #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \
310 ALIGN(size, __alignof__(struct nft_expr)))
311
312 /**
313 * struct nft_expr - nf_tables expression
314 *
315 * @ops: expression ops
316 * @data: expression private data
317 */
318 struct nft_expr {
319 const struct nft_expr_ops *ops;
320 unsigned char data[]
321 __attribute__((aligned(__alignof__(u64))));
322 };
323
324 static inline void *nft_expr_priv(const struct nft_expr *expr)
325 {
326 return (void *)expr->data;
327 }
328
329 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src);
330 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr);
331 int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
332 const struct nft_expr *expr);
333
334 struct nft_set_ext;
335
336 /**
337 * struct nft_set_ops - nf_tables set operations
338 *
339 * @lookup: look up an element within the set
340 * @update: update an element if exists, add it if doesn't exist
341 * @delete: delete an element
342 * @insert: insert new element into set
343 * @activate: activate new element in the next generation
344 * @deactivate: lookup for element and deactivate it in the next generation
345 * @flush: deactivate element in the next generation
346 * @remove: remove element from set
347 * @walk: iterate over all set elements
348 * @get: get set elements
349 * @privsize: function to return size of set private data
350 * @init: initialize private data of new set instance
351 * @destroy: destroy private data of set instance
352 * @elemsize: element private size
353 *
354 * Operations lookup, update and delete have simpler interfaces, are faster
355 * and currently only used in the packet path. All the rest are slower,
356 * control plane functions.
357 */
358 struct nft_set_ops {
359 bool (*lookup)(const struct net *net,
360 const struct nft_set *set,
361 const u32 *key,
362 const struct nft_set_ext **ext);
363 bool (*update)(struct nft_set *set,
364 const u32 *key,
365 void *(*new)(struct nft_set *,
366 const struct nft_expr *,
367 struct nft_regs *),
368 const struct nft_expr *expr,
369 struct nft_regs *regs,
370 const struct nft_set_ext **ext);
371 bool (*delete)(const struct nft_set *set,
372 const u32 *key);
373
374 int (*insert)(const struct net *net,
375 const struct nft_set *set,
376 const struct nft_set_elem *elem,
377 struct nft_set_ext **ext);
378 void (*activate)(const struct net *net,
379 const struct nft_set *set,
380 const struct nft_set_elem *elem);
381 void * (*deactivate)(const struct net *net,
382 const struct nft_set *set,
383 const struct nft_set_elem *elem);
384 bool (*flush)(const struct net *net,
385 const struct nft_set *set,
386 void *priv);
387 void (*remove)(const struct net *net,
388 const struct nft_set *set,
389 const struct nft_set_elem *elem);
390 void (*walk)(const struct nft_ctx *ctx,
391 struct nft_set *set,
392 struct nft_set_iter *iter);
393 void * (*get)(const struct net *net,
394 const struct nft_set *set,
395 const struct nft_set_elem *elem,
396 unsigned int flags);
397
398 u64 (*privsize)(const struct nlattr * const nla[],
399 const struct nft_set_desc *desc);
400 bool (*estimate)(const struct nft_set_desc *desc,
401 u32 features,
402 struct nft_set_estimate *est);
403 int (*init)(const struct nft_set *set,
404 const struct nft_set_desc *desc,
405 const struct nlattr * const nla[]);
406 void (*destroy)(const struct nft_set *set);
407 void (*gc_init)(const struct nft_set *set);
408
409 unsigned int elemsize;
410 };
411
412 /**
413 * struct nft_set_type - nf_tables set type
414 *
415 * @ops: set ops for this type
416 * @features: features supported by the implementation
417 */
418 struct nft_set_type {
419 const struct nft_set_ops ops;
420 u32 features;
421 };
422 #define to_set_type(o) container_of(o, struct nft_set_type, ops)
423
424 struct nft_set_elem_expr {
425 u8 size;
426 unsigned char data[]
427 __attribute__((aligned(__alignof__(struct nft_expr))));
428 };
429
430 #define nft_setelem_expr_at(__elem_expr, __offset) \
431 ((struct nft_expr *)&__elem_expr->data[__offset])
432
433 #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \
434 for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \
435 __size < (__elem_expr)->size; \
436 __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size)
437
438 #define NFT_SET_EXPR_MAX 2
439
440 /**
441 * struct nft_set - nf_tables set instance
442 *
443 * @list: table set list node
444 * @bindings: list of set bindings
445 * @table: table this set belongs to
446 * @net: netnamespace this set belongs to
447 * @name: name of the set
448 * @handle: unique handle of the set
449 * @ktype: key type (numeric type defined by userspace, not used in the kernel)
450 * @dtype: data type (verdict or numeric type defined by userspace)
451 * @objtype: object type (see NFT_OBJECT_* definitions)
452 * @size: maximum set size
453 * @field_len: length of each field in concatenation, bytes
454 * @field_count: number of concatenated fields in element
455 * @use: number of rules references to this set
456 * @nelems: number of elements
457 * @ndeact: number of deactivated elements queued for removal
458 * @timeout: default timeout value in jiffies
459 * @gc_int: garbage collection interval in msecs
460 * @policy: set parameterization (see enum nft_set_policies)
461 * @udlen: user data length
462 * @udata: user data
463 * @expr: stateful expression
464 * @ops: set ops
465 * @flags: set flags
466 * @genmask: generation mask
467 * @klen: key length
468 * @dlen: data length
469 * @data: private set data
470 */
471 struct nft_set {
472 struct list_head list;
473 struct list_head bindings;
474 struct nft_table *table;
475 possible_net_t net;
476 char *name;
477 u64 handle;
478 u32 ktype;
479 u32 dtype;
480 u32 objtype;
481 u32 size;
482 u8 field_len[NFT_REG32_COUNT];
483 u8 field_count;
484 u32 use;
485 atomic_t nelems;
486 u32 ndeact;
487 u64 timeout;
488 u32 gc_int;
489 u16 policy;
490 u16 udlen;
491 unsigned char *udata;
492 /* runtime data below here */
493 const struct nft_set_ops *ops ____cacheline_aligned;
494 u16 flags:14,
495 genmask:2;
496 u8 klen;
497 u8 dlen;
498 u8 num_exprs;
499 struct nft_expr *exprs[NFT_SET_EXPR_MAX];
500 unsigned char data[]
501 __attribute__((aligned(__alignof__(u64))));
502 };
503
504 static inline bool nft_set_is_anonymous(const struct nft_set *set)
505 {
506 return set->flags & NFT_SET_ANONYMOUS;
507 }
508
509 static inline void *nft_set_priv(const struct nft_set *set)
510 {
511 return (void *)set->data;
512 }
513
514 static inline struct nft_set *nft_set_container_of(const void *priv)
515 {
516 return (void *)priv - offsetof(struct nft_set, data);
517 }
518
519 struct nft_set *nft_set_lookup_global(const struct net *net,
520 const struct nft_table *table,
521 const struct nlattr *nla_set_name,
522 const struct nlattr *nla_set_id,
523 u8 genmask);
524
525 static inline unsigned long nft_set_gc_interval(const struct nft_set *set)
526 {
527 return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ;
528 }
529
530 /**
531 * struct nft_set_binding - nf_tables set binding
532 *
533 * @list: set bindings list node
534 * @chain: chain containing the rule bound to the set
535 * @flags: set action flags
536 *
537 * A set binding contains all information necessary for validation
538 * of new elements added to a bound set.
539 */
540 struct nft_set_binding {
541 struct list_head list;
542 const struct nft_chain *chain;
543 u32 flags;
544 };
545
546 enum nft_trans_phase;
547 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
548 struct nft_set_binding *binding,
549 enum nft_trans_phase phase);
550 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
551 struct nft_set_binding *binding);
552 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set);
553
554 /**
555 * enum nft_set_extensions - set extension type IDs
556 *
557 * @NFT_SET_EXT_KEY: element key
558 * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges
559 * @NFT_SET_EXT_DATA: mapping data
560 * @NFT_SET_EXT_FLAGS: element flags
561 * @NFT_SET_EXT_TIMEOUT: element timeout
562 * @NFT_SET_EXT_EXPIRATION: element expiration time
563 * @NFT_SET_EXT_USERDATA: user data associated with the element
564 * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element
565 * @NFT_SET_EXT_OBJREF: stateful object reference associated with element
566 * @NFT_SET_EXT_NUM: number of extension types
567 */
568 enum nft_set_extensions {
569 NFT_SET_EXT_KEY,
570 NFT_SET_EXT_KEY_END,
571 NFT_SET_EXT_DATA,
572 NFT_SET_EXT_FLAGS,
573 NFT_SET_EXT_TIMEOUT,
574 NFT_SET_EXT_EXPIRATION,
575 NFT_SET_EXT_USERDATA,
576 NFT_SET_EXT_EXPRESSIONS,
577 NFT_SET_EXT_OBJREF,
578 NFT_SET_EXT_NUM
579 };
580
581 /**
582 * struct nft_set_ext_type - set extension type
583 *
584 * @len: fixed part length of the extension
585 * @align: alignment requirements of the extension
586 */
587 struct nft_set_ext_type {
588 u8 len;
589 u8 align;
590 };
591
592 extern const struct nft_set_ext_type nft_set_ext_types[];
593
594 /**
595 * struct nft_set_ext_tmpl - set extension template
596 *
597 * @len: length of extension area
598 * @offset: offsets of individual extension types
599 */
600 struct nft_set_ext_tmpl {
601 u16 len;
602 u8 offset[NFT_SET_EXT_NUM];
603 };
604
605 /**
606 * struct nft_set_ext - set extensions
607 *
608 * @genmask: generation mask
609 * @offset: offsets of individual extension types
610 * @data: beginning of extension data
611 */
612 struct nft_set_ext {
613 u8 genmask;
614 u8 offset[NFT_SET_EXT_NUM];
615 char data[];
616 };
617
618 static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl)
619 {
620 memset(tmpl, 0, sizeof(*tmpl));
621 tmpl->len = sizeof(struct nft_set_ext);
622 }
623
624 static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id,
625 unsigned int len)
626 {
627 tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align);
628 BUG_ON(tmpl->len > U8_MAX);
629 tmpl->offset[id] = tmpl->len;
630 tmpl->len += nft_set_ext_types[id].len + len;
631 }
632
633 static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id)
634 {
635 nft_set_ext_add_length(tmpl, id, 0);
636 }
637
638 static inline void nft_set_ext_init(struct nft_set_ext *ext,
639 const struct nft_set_ext_tmpl *tmpl)
640 {
641 memcpy(ext->offset, tmpl->offset, sizeof(ext->offset));
642 }
643
644 static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id)
645 {
646 return !!ext->offset[id];
647 }
648
649 static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id)
650 {
651 return ext && __nft_set_ext_exists(ext, id);
652 }
653
654 static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id)
655 {
656 return (void *)ext + ext->offset[id];
657 }
658
659 static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext)
660 {
661 return nft_set_ext(ext, NFT_SET_EXT_KEY);
662 }
663
664 static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext)
665 {
666 return nft_set_ext(ext, NFT_SET_EXT_KEY_END);
667 }
668
669 static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext)
670 {
671 return nft_set_ext(ext, NFT_SET_EXT_DATA);
672 }
673
674 static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext)
675 {
676 return nft_set_ext(ext, NFT_SET_EXT_FLAGS);
677 }
678
679 static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext)
680 {
681 return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT);
682 }
683
684 static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext)
685 {
686 return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION);
687 }
688
689 static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext)
690 {
691 return nft_set_ext(ext, NFT_SET_EXT_USERDATA);
692 }
693
694 static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext)
695 {
696 return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS);
697 }
698
699 static inline bool nft_set_elem_expired(const struct nft_set_ext *ext)
700 {
701 return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) &&
702 time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext));
703 }
704
705 static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set,
706 void *elem)
707 {
708 return elem + set->ops->elemsize;
709 }
710
711 static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext)
712 {
713 return nft_set_ext(ext, NFT_SET_EXT_OBJREF);
714 }
715
716 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
717 const struct nft_set *set,
718 const struct nlattr *attr);
719
720 void *nft_set_elem_init(const struct nft_set *set,
721 const struct nft_set_ext_tmpl *tmpl,
722 const u32 *key, const u32 *key_end, const u32 *data,
723 u64 timeout, u64 expiration, gfp_t gfp);
724 int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
725 struct nft_expr *expr_array[]);
726 void nft_set_elem_destroy(const struct nft_set *set, void *elem,
727 bool destroy_expr);
728
729 /**
730 * struct nft_set_gc_batch_head - nf_tables set garbage collection batch
731 *
732 * @rcu: rcu head
733 * @set: set the elements belong to
734 * @cnt: count of elements
735 */
736 struct nft_set_gc_batch_head {
737 struct rcu_head rcu;
738 const struct nft_set *set;
739 unsigned int cnt;
740 };
741
742 #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \
743 sizeof(struct nft_set_gc_batch_head)) / \
744 sizeof(void *))
745
746 /**
747 * struct nft_set_gc_batch - nf_tables set garbage collection batch
748 *
749 * @head: GC batch head
750 * @elems: garbage collection elements
751 */
752 struct nft_set_gc_batch {
753 struct nft_set_gc_batch_head head;
754 void *elems[NFT_SET_GC_BATCH_SIZE];
755 };
756
757 struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
758 gfp_t gfp);
759 void nft_set_gc_batch_release(struct rcu_head *rcu);
760
761 static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb)
762 {
763 if (gcb != NULL)
764 call_rcu(&gcb->head.rcu, nft_set_gc_batch_release);
765 }
766
767 static inline struct nft_set_gc_batch *
768 nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb,
769 gfp_t gfp)
770 {
771 if (gcb != NULL) {
772 if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems))
773 return gcb;
774 nft_set_gc_batch_complete(gcb);
775 }
776 return nft_set_gc_batch_alloc(set, gfp);
777 }
778
779 static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb,
780 void *elem)
781 {
782 gcb->elems[gcb->head.cnt++] = elem;
783 }
784
785 struct nft_expr_ops;
786 /**
787 * struct nft_expr_type - nf_tables expression type
788 *
789 * @select_ops: function to select nft_expr_ops
790 * @release_ops: release nft_expr_ops
791 * @ops: default ops, used when no select_ops functions is present
792 * @list: used internally
793 * @name: Identifier
794 * @owner: module reference
795 * @policy: netlink attribute policy
796 * @maxattr: highest netlink attribute number
797 * @family: address family for AF-specific types
798 * @flags: expression type flags
799 */
800 struct nft_expr_type {
801 const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *,
802 const struct nlattr * const tb[]);
803 void (*release_ops)(const struct nft_expr_ops *ops);
804 const struct nft_expr_ops *ops;
805 struct list_head list;
806 const char *name;
807 struct module *owner;
808 const struct nla_policy *policy;
809 unsigned int maxattr;
810 u8 family;
811 u8 flags;
812 };
813
814 #define NFT_EXPR_STATEFUL 0x1
815 #define NFT_EXPR_GC 0x2
816
817 enum nft_trans_phase {
818 NFT_TRANS_PREPARE,
819 NFT_TRANS_ABORT,
820 NFT_TRANS_COMMIT,
821 NFT_TRANS_RELEASE
822 };
823
824 struct nft_flow_rule;
825 struct nft_offload_ctx;
826
827 /**
828 * struct nft_expr_ops - nf_tables expression operations
829 *
830 * @eval: Expression evaluation function
831 * @size: full expression size, including private data size
832 * @init: initialization function
833 * @activate: activate expression in the next generation
834 * @deactivate: deactivate expression in next generation
835 * @destroy: destruction function, called after synchronize_rcu
836 * @dump: function to dump parameters
837 * @type: expression type
838 * @validate: validate expression, called during loop detection
839 * @data: extra data to attach to this expression operation
840 */
841 struct nft_expr_ops {
842 void (*eval)(const struct nft_expr *expr,
843 struct nft_regs *regs,
844 const struct nft_pktinfo *pkt);
845 int (*clone)(struct nft_expr *dst,
846 const struct nft_expr *src);
847 unsigned int size;
848
849 int (*init)(const struct nft_ctx *ctx,
850 const struct nft_expr *expr,
851 const struct nlattr * const tb[]);
852 void (*activate)(const struct nft_ctx *ctx,
853 const struct nft_expr *expr);
854 void (*deactivate)(const struct nft_ctx *ctx,
855 const struct nft_expr *expr,
856 enum nft_trans_phase phase);
857 void (*destroy)(const struct nft_ctx *ctx,
858 const struct nft_expr *expr);
859 void (*destroy_clone)(const struct nft_ctx *ctx,
860 const struct nft_expr *expr);
861 int (*dump)(struct sk_buff *skb,
862 const struct nft_expr *expr);
863 int (*validate)(const struct nft_ctx *ctx,
864 const struct nft_expr *expr,
865 const struct nft_data **data);
866 bool (*gc)(struct net *net,
867 const struct nft_expr *expr);
868 int (*offload)(struct nft_offload_ctx *ctx,
869 struct nft_flow_rule *flow,
870 const struct nft_expr *expr);
871 u32 offload_flags;
872 const struct nft_expr_type *type;
873 void *data;
874 };
875
876 /**
877 * struct nft_rule - nf_tables rule
878 *
879 * @list: used internally
880 * @handle: rule handle
881 * @genmask: generation mask
882 * @dlen: length of expression data
883 * @udata: user data is appended to the rule
884 * @data: expression data
885 */
886 struct nft_rule {
887 struct list_head list;
888 u64 handle:42,
889 genmask:2,
890 dlen:12,
891 udata:1;
892 unsigned char data[]
893 __attribute__((aligned(__alignof__(struct nft_expr))));
894 };
895
896 static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule)
897 {
898 return (struct nft_expr *)&rule->data[0];
899 }
900
901 static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr)
902 {
903 return ((void *)expr) + expr->ops->size;
904 }
905
906 static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule)
907 {
908 return (struct nft_expr *)&rule->data[rule->dlen];
909 }
910
911 static inline bool nft_expr_more(const struct nft_rule *rule,
912 const struct nft_expr *expr)
913 {
914 return expr != nft_expr_last(rule) && expr->ops;
915 }
916
917 static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule)
918 {
919 return (void *)&rule->data[rule->dlen];
920 }
921
922 void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule);
923
924 static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext,
925 struct nft_regs *regs,
926 const struct nft_pktinfo *pkt)
927 {
928 struct nft_set_elem_expr *elem_expr;
929 struct nft_expr *expr;
930 u32 size;
931
932 if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) {
933 elem_expr = nft_set_ext_expr(ext);
934 nft_setelem_expr_foreach(expr, elem_expr, size) {
935 expr->ops->eval(expr, regs, pkt);
936 if (regs->verdict.code == NFT_BREAK)
937 return;
938 }
939 }
940 }
941
942 /*
943 * The last pointer isn't really necessary, but the compiler isn't able to
944 * determine that the result of nft_expr_last() is always the same since it
945 * can't assume that the dlen value wasn't changed within calls in the loop.
946 */
947 #define nft_rule_for_each_expr(expr, last, rule) \
948 for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \
949 (expr) != (last); \
950 (expr) = nft_expr_next(expr))
951
952 #define NFT_CHAIN_POLICY_UNSET U8_MAX
953
954 /**
955 * struct nft_chain - nf_tables chain
956 *
957 * @rules: list of rules in the chain
958 * @list: used internally
959 * @rhlhead: used internally
960 * @table: table that this chain belongs to
961 * @handle: chain handle
962 * @use: number of jump references to this chain
963 * @flags: bitmask of enum nft_chain_flags
964 * @name: name of the chain
965 */
966 struct nft_chain {
967 struct nft_rule *__rcu *rules_gen_0;
968 struct nft_rule *__rcu *rules_gen_1;
969 struct list_head rules;
970 struct list_head list;
971 struct rhlist_head rhlhead;
972 struct nft_table *table;
973 u64 handle;
974 u32 use;
975 u8 flags:5,
976 bound:1,
977 genmask:2;
978 char *name;
979 u16 udlen;
980 u8 *udata;
981
982 /* Only used during control plane commit phase: */
983 struct nft_rule **rules_next;
984 };
985
986 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain);
987
988 enum nft_chain_types {
989 NFT_CHAIN_T_DEFAULT = 0,
990 NFT_CHAIN_T_ROUTE,
991 NFT_CHAIN_T_NAT,
992 NFT_CHAIN_T_MAX
993 };
994
995 /**
996 * struct nft_chain_type - nf_tables chain type info
997 *
998 * @name: name of the type
999 * @type: numeric identifier
1000 * @family: address family
1001 * @owner: module owner
1002 * @hook_mask: mask of valid hooks
1003 * @hooks: array of hook functions
1004 * @ops_register: base chain register function
1005 * @ops_unregister: base chain unregister function
1006 */
1007 struct nft_chain_type {
1008 const char *name;
1009 enum nft_chain_types type;
1010 int family;
1011 struct module *owner;
1012 unsigned int hook_mask;
1013 nf_hookfn *hooks[NFT_MAX_HOOKS];
1014 int (*ops_register)(struct net *net, const struct nf_hook_ops *ops);
1015 void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops);
1016 };
1017
1018 int nft_chain_validate_dependency(const struct nft_chain *chain,
1019 enum nft_chain_types type);
1020 int nft_chain_validate_hooks(const struct nft_chain *chain,
1021 unsigned int hook_flags);
1022
1023 static inline bool nft_chain_is_bound(struct nft_chain *chain)
1024 {
1025 return (chain->flags & NFT_CHAIN_BINDING) && chain->bound;
1026 }
1027
1028 void nft_chain_del(struct nft_chain *chain);
1029 void nf_tables_chain_destroy(struct nft_ctx *ctx);
1030
1031 struct nft_stats {
1032 u64 bytes;
1033 u64 pkts;
1034 struct u64_stats_sync syncp;
1035 };
1036
1037 struct nft_hook {
1038 struct list_head list;
1039 bool inactive;
1040 struct nf_hook_ops ops;
1041 struct rcu_head rcu;
1042 };
1043
1044 /**
1045 * struct nft_base_chain - nf_tables base chain
1046 *
1047 * @ops: netfilter hook ops
1048 * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family)
1049 * @type: chain type
1050 * @policy: default policy
1051 * @stats: per-cpu chain stats
1052 * @chain: the chain
1053 * @flow_block: flow block (for hardware offload)
1054 */
1055 struct nft_base_chain {
1056 struct nf_hook_ops ops;
1057 struct list_head hook_list;
1058 const struct nft_chain_type *type;
1059 u8 policy;
1060 u8 flags;
1061 struct nft_stats __percpu *stats;
1062 struct nft_chain chain;
1063 struct flow_block flow_block;
1064 };
1065
1066 static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain)
1067 {
1068 return container_of(chain, struct nft_base_chain, chain);
1069 }
1070
1071 static inline bool nft_is_base_chain(const struct nft_chain *chain)
1072 {
1073 return chain->flags & NFT_CHAIN_BASE;
1074 }
1075
1076 int __nft_release_basechain(struct nft_ctx *ctx);
1077
1078 unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv);
1079
1080 /**
1081 * struct nft_table - nf_tables table
1082 *
1083 * @list: used internally
1084 * @chains_ht: chains in the table
1085 * @chains: same, for stable walks
1086 * @sets: sets in the table
1087 * @objects: stateful objects in the table
1088 * @flowtables: flow tables in the table
1089 * @hgenerator: handle generator state
1090 * @handle: table handle
1091 * @use: number of chain references to this table
1092 * @flags: table flag (see enum nft_table_flags)
1093 * @genmask: generation mask
1094 * @afinfo: address family info
1095 * @name: name of the table
1096 */
1097 struct nft_table {
1098 struct list_head list;
1099 struct rhltable chains_ht;
1100 struct list_head chains;
1101 struct list_head sets;
1102 struct list_head objects;
1103 struct list_head flowtables;
1104 u64 hgenerator;
1105 u64 handle;
1106 u32 use;
1107 u16 family:6,
1108 flags:8,
1109 genmask:2;
1110 char *name;
1111 u16 udlen;
1112 u8 *udata;
1113 };
1114
1115 static inline bool nft_base_chain_netdev(int family, u32 hooknum)
1116 {
1117 return family == NFPROTO_NETDEV ||
1118 (family == NFPROTO_INET && hooknum == NF_INET_INGRESS);
1119 }
1120
1121 void nft_register_chain_type(const struct nft_chain_type *);
1122 void nft_unregister_chain_type(const struct nft_chain_type *);
1123
1124 int nft_register_expr(struct nft_expr_type *);
1125 void nft_unregister_expr(struct nft_expr_type *);
1126
1127 int nft_verdict_dump(struct sk_buff *skb, int type,
1128 const struct nft_verdict *v);
1129
1130 /**
1131 * struct nft_object_hash_key - key to lookup nft_object
1132 *
1133 * @name: name of the stateful object to look up
1134 * @table: table the object belongs to
1135 */
1136 struct nft_object_hash_key {
1137 const char *name;
1138 const struct nft_table *table;
1139 };
1140
1141 /**
1142 * struct nft_object - nf_tables stateful object
1143 *
1144 * @list: table stateful object list node
1145 * @key: keys that identify this object
1146 * @rhlhead: nft_objname_ht node
1147 * @genmask: generation mask
1148 * @use: number of references to this stateful object
1149 * @handle: unique object handle
1150 * @ops: object operations
1151 * @data: object data, layout depends on type
1152 */
1153 struct nft_object {
1154 struct list_head list;
1155 struct rhlist_head rhlhead;
1156 struct nft_object_hash_key key;
1157 u32 genmask:2,
1158 use:30;
1159 u64 handle;
1160 u16 udlen;
1161 u8 *udata;
1162 /* runtime data below here */
1163 const struct nft_object_ops *ops ____cacheline_aligned;
1164 unsigned char data[]
1165 __attribute__((aligned(__alignof__(u64))));
1166 };
1167
1168 static inline void *nft_obj_data(const struct nft_object *obj)
1169 {
1170 return (void *)obj->data;
1171 }
1172
1173 #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr))
1174
1175 struct nft_object *nft_obj_lookup(const struct net *net,
1176 const struct nft_table *table,
1177 const struct nlattr *nla, u32 objtype,
1178 u8 genmask);
1179
1180 void nft_obj_notify(struct net *net, const struct nft_table *table,
1181 struct nft_object *obj, u32 portid, u32 seq,
1182 int event, int family, int report, gfp_t gfp);
1183
1184 /**
1185 * struct nft_object_type - stateful object type
1186 *
1187 * @select_ops: function to select nft_object_ops
1188 * @ops: default ops, used when no select_ops functions is present
1189 * @list: list node in list of object types
1190 * @type: stateful object numeric type
1191 * @owner: module owner
1192 * @maxattr: maximum netlink attribute
1193 * @policy: netlink attribute policy
1194 */
1195 struct nft_object_type {
1196 const struct nft_object_ops *(*select_ops)(const struct nft_ctx *,
1197 const struct nlattr * const tb[]);
1198 const struct nft_object_ops *ops;
1199 struct list_head list;
1200 u32 type;
1201 unsigned int maxattr;
1202 struct module *owner;
1203 const struct nla_policy *policy;
1204 };
1205
1206 /**
1207 * struct nft_object_ops - stateful object operations
1208 *
1209 * @eval: stateful object evaluation function
1210 * @size: stateful object size
1211 * @init: initialize object from netlink attributes
1212 * @destroy: release existing stateful object
1213 * @dump: netlink dump stateful object
1214 * @update: update stateful object
1215 */
1216 struct nft_object_ops {
1217 void (*eval)(struct nft_object *obj,
1218 struct nft_regs *regs,
1219 const struct nft_pktinfo *pkt);
1220 unsigned int size;
1221 int (*init)(const struct nft_ctx *ctx,
1222 const struct nlattr *const tb[],
1223 struct nft_object *obj);
1224 void (*destroy)(const struct nft_ctx *ctx,
1225 struct nft_object *obj);
1226 int (*dump)(struct sk_buff *skb,
1227 struct nft_object *obj,
1228 bool reset);
1229 void (*update)(struct nft_object *obj,
1230 struct nft_object *newobj);
1231 const struct nft_object_type *type;
1232 };
1233
1234 int nft_register_obj(struct nft_object_type *obj_type);
1235 void nft_unregister_obj(struct nft_object_type *obj_type);
1236
1237 #define NFT_NETDEVICE_MAX 256
1238
1239 /**
1240 * struct nft_flowtable - nf_tables flow table
1241 *
1242 * @list: flow table list node in table list
1243 * @table: the table the flow table is contained in
1244 * @name: name of this flow table
1245 * @hooknum: hook number
1246 * @ops_len: number of hooks in array
1247 * @genmask: generation mask
1248 * @use: number of references to this flow table
1249 * @handle: unique object handle
1250 * @dev_name: array of device names
1251 * @data: rhashtable and garbage collector
1252 * @ops: array of hooks
1253 */
1254 struct nft_flowtable {
1255 struct list_head list;
1256 struct nft_table *table;
1257 char *name;
1258 int hooknum;
1259 int ops_len;
1260 u32 genmask:2,
1261 use:30;
1262 u64 handle;
1263 /* runtime data below here */
1264 struct list_head hook_list ____cacheline_aligned;
1265 struct nf_flowtable data;
1266 };
1267
1268 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
1269 const struct nlattr *nla,
1270 u8 genmask);
1271
1272 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
1273 struct nft_flowtable *flowtable,
1274 enum nft_trans_phase phase);
1275
1276 void nft_register_flowtable_type(struct nf_flowtable_type *type);
1277 void nft_unregister_flowtable_type(struct nf_flowtable_type *type);
1278
1279 /**
1280 * struct nft_traceinfo - nft tracing information and state
1281 *
1282 * @pkt: pktinfo currently processed
1283 * @basechain: base chain currently processed
1284 * @chain: chain currently processed
1285 * @rule: rule that was evaluated
1286 * @verdict: verdict given by rule
1287 * @type: event type (enum nft_trace_types)
1288 * @packet_dumped: packet headers sent in a previous traceinfo message
1289 * @trace: other struct members are initialised
1290 */
1291 struct nft_traceinfo {
1292 const struct nft_pktinfo *pkt;
1293 const struct nft_base_chain *basechain;
1294 const struct nft_chain *chain;
1295 const struct nft_rule *rule;
1296 const struct nft_verdict *verdict;
1297 enum nft_trace_types type;
1298 bool packet_dumped;
1299 bool trace;
1300 };
1301
1302 void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt,
1303 const struct nft_verdict *verdict,
1304 const struct nft_chain *basechain);
1305
1306 void nft_trace_notify(struct nft_traceinfo *info);
1307
1308 #define MODULE_ALIAS_NFT_CHAIN(family, name) \
1309 MODULE_ALIAS("nft-chain-" __stringify(family) "-" name)
1310
1311 #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \
1312 MODULE_ALIAS("nft-expr-" __stringify(family) "-" name)
1313
1314 #define MODULE_ALIAS_NFT_EXPR(name) \
1315 MODULE_ALIAS("nft-expr-" name)
1316
1317 #define MODULE_ALIAS_NFT_OBJ(type) \
1318 MODULE_ALIAS("nft-obj-" __stringify(type))
1319
1320 #if IS_ENABLED(CONFIG_NF_TABLES)
1321
1322 /*
1323 * The gencursor defines two generations, the currently active and the
1324 * next one. Objects contain a bitmask of 2 bits specifying the generations
1325 * they're active in. A set bit means they're inactive in the generation
1326 * represented by that bit.
1327 *
1328 * New objects start out as inactive in the current and active in the
1329 * next generation. When committing the ruleset the bitmask is cleared,
1330 * meaning they're active in all generations. When removing an object,
1331 * it is set inactive in the next generation. After committing the ruleset,
1332 * the objects are removed.
1333 */
1334 static inline unsigned int nft_gencursor_next(const struct net *net)
1335 {
1336 return net->nft.gencursor + 1 == 1 ? 1 : 0;
1337 }
1338
1339 static inline u8 nft_genmask_next(const struct net *net)
1340 {
1341 return 1 << nft_gencursor_next(net);
1342 }
1343
1344 static inline u8 nft_genmask_cur(const struct net *net)
1345 {
1346 /* Use READ_ONCE() to prevent refetching the value for atomicity */
1347 return 1 << READ_ONCE(net->nft.gencursor);
1348 }
1349
1350 #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1))
1351
1352 /*
1353 * Generic transaction helpers
1354 */
1355
1356 /* Check if this object is currently active. */
1357 #define nft_is_active(__net, __obj) \
1358 (((__obj)->genmask & nft_genmask_cur(__net)) == 0)
1359
1360 /* Check if this object is active in the next generation. */
1361 #define nft_is_active_next(__net, __obj) \
1362 (((__obj)->genmask & nft_genmask_next(__net)) == 0)
1363
1364 /* This object becomes active in the next generation. */
1365 #define nft_activate_next(__net, __obj) \
1366 (__obj)->genmask = nft_genmask_cur(__net)
1367
1368 /* This object becomes inactive in the next generation. */
1369 #define nft_deactivate_next(__net, __obj) \
1370 (__obj)->genmask = nft_genmask_next(__net)
1371
1372 /* After committing the ruleset, clear the stale generation bit. */
1373 #define nft_clear(__net, __obj) \
1374 (__obj)->genmask &= ~nft_genmask_next(__net)
1375 #define nft_active_genmask(__obj, __genmask) \
1376 !((__obj)->genmask & __genmask)
1377
1378 /*
1379 * Set element transaction helpers
1380 */
1381
1382 static inline bool nft_set_elem_active(const struct nft_set_ext *ext,
1383 u8 genmask)
1384 {
1385 return !(ext->genmask & genmask);
1386 }
1387
1388 static inline void nft_set_elem_change_active(const struct net *net,
1389 const struct nft_set *set,
1390 struct nft_set_ext *ext)
1391 {
1392 ext->genmask ^= nft_genmask_next(net);
1393 }
1394
1395 #endif /* IS_ENABLED(CONFIG_NF_TABLES) */
1396
1397 /*
1398 * We use a free bit in the genmask field to indicate the element
1399 * is busy, meaning it is currently being processed either by
1400 * the netlink API or GC.
1401 *
1402 * Even though the genmask is only a single byte wide, this works
1403 * because the extension structure if fully constant once initialized,
1404 * so there are no non-atomic write accesses unless it is already
1405 * marked busy.
1406 */
1407 #define NFT_SET_ELEM_BUSY_MASK (1 << 2)
1408
1409 #if defined(__LITTLE_ENDIAN_BITFIELD)
1410 #define NFT_SET_ELEM_BUSY_BIT 2
1411 #elif defined(__BIG_ENDIAN_BITFIELD)
1412 #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2)
1413 #else
1414 #error
1415 #endif
1416
1417 static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext)
1418 {
1419 unsigned long *word = (unsigned long *)ext;
1420
1421 BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0);
1422 return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word);
1423 }
1424
1425 static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext)
1426 {
1427 unsigned long *word = (unsigned long *)ext;
1428
1429 clear_bit(NFT_SET_ELEM_BUSY_BIT, word);
1430 }
1431
1432 /**
1433 * struct nft_trans - nf_tables object update in transaction
1434 *
1435 * @list: used internally
1436 * @msg_type: message type
1437 * @put_net: ctx->net needs to be put
1438 * @ctx: transaction context
1439 * @data: internal information related to the transaction
1440 */
1441 struct nft_trans {
1442 struct list_head list;
1443 int msg_type;
1444 bool put_net;
1445 struct nft_ctx ctx;
1446 char data[];
1447 };
1448
1449 struct nft_trans_rule {
1450 struct nft_rule *rule;
1451 struct nft_flow_rule *flow;
1452 u32 rule_id;
1453 };
1454
1455 #define nft_trans_rule(trans) \
1456 (((struct nft_trans_rule *)trans->data)->rule)
1457 #define nft_trans_flow_rule(trans) \
1458 (((struct nft_trans_rule *)trans->data)->flow)
1459 #define nft_trans_rule_id(trans) \
1460 (((struct nft_trans_rule *)trans->data)->rule_id)
1461
1462 struct nft_trans_set {
1463 struct nft_set *set;
1464 u32 set_id;
1465 bool bound;
1466 };
1467
1468 #define nft_trans_set(trans) \
1469 (((struct nft_trans_set *)trans->data)->set)
1470 #define nft_trans_set_id(trans) \
1471 (((struct nft_trans_set *)trans->data)->set_id)
1472 #define nft_trans_set_bound(trans) \
1473 (((struct nft_trans_set *)trans->data)->bound)
1474
1475 struct nft_trans_chain {
1476 bool update;
1477 char *name;
1478 struct nft_stats __percpu *stats;
1479 u8 policy;
1480 u32 chain_id;
1481 };
1482
1483 #define nft_trans_chain_update(trans) \
1484 (((struct nft_trans_chain *)trans->data)->update)
1485 #define nft_trans_chain_name(trans) \
1486 (((struct nft_trans_chain *)trans->data)->name)
1487 #define nft_trans_chain_stats(trans) \
1488 (((struct nft_trans_chain *)trans->data)->stats)
1489 #define nft_trans_chain_policy(trans) \
1490 (((struct nft_trans_chain *)trans->data)->policy)
1491 #define nft_trans_chain_id(trans) \
1492 (((struct nft_trans_chain *)trans->data)->chain_id)
1493
1494 struct nft_trans_table {
1495 bool update;
1496 bool enable;
1497 };
1498
1499 #define nft_trans_table_update(trans) \
1500 (((struct nft_trans_table *)trans->data)->update)
1501 #define nft_trans_table_enable(trans) \
1502 (((struct nft_trans_table *)trans->data)->enable)
1503
1504 struct nft_trans_elem {
1505 struct nft_set *set;
1506 struct nft_set_elem elem;
1507 bool bound;
1508 };
1509
1510 #define nft_trans_elem_set(trans) \
1511 (((struct nft_trans_elem *)trans->data)->set)
1512 #define nft_trans_elem(trans) \
1513 (((struct nft_trans_elem *)trans->data)->elem)
1514 #define nft_trans_elem_set_bound(trans) \
1515 (((struct nft_trans_elem *)trans->data)->bound)
1516
1517 struct nft_trans_obj {
1518 struct nft_object *obj;
1519 struct nft_object *newobj;
1520 bool update;
1521 };
1522
1523 #define nft_trans_obj(trans) \
1524 (((struct nft_trans_obj *)trans->data)->obj)
1525 #define nft_trans_obj_newobj(trans) \
1526 (((struct nft_trans_obj *)trans->data)->newobj)
1527 #define nft_trans_obj_update(trans) \
1528 (((struct nft_trans_obj *)trans->data)->update)
1529
1530 struct nft_trans_flowtable {
1531 struct nft_flowtable *flowtable;
1532 bool update;
1533 struct list_head hook_list;
1534 u32 flags;
1535 };
1536
1537 #define nft_trans_flowtable(trans) \
1538 (((struct nft_trans_flowtable *)trans->data)->flowtable)
1539 #define nft_trans_flowtable_update(trans) \
1540 (((struct nft_trans_flowtable *)trans->data)->update)
1541 #define nft_trans_flowtable_hooks(trans) \
1542 (((struct nft_trans_flowtable *)trans->data)->hook_list)
1543 #define nft_trans_flowtable_flags(trans) \
1544 (((struct nft_trans_flowtable *)trans->data)->flags)
1545
1546 int __init nft_chain_filter_init(void);
1547 void nft_chain_filter_fini(void);
1548
1549 void __init nft_chain_route_init(void);
1550 void nft_chain_route_fini(void);
1551
1552 void nf_tables_trans_destroy_flush_work(void);
1553
1554 int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result);
1555 __be64 nf_jiffies64_to_msecs(u64 input);
1556
1557 #endif /* _NET_NF_TABLES_H */
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