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96518518 PM |
1 | #ifndef _NET_NF_TABLES_H |
2 | #define _NET_NF_TABLES_H | |
3 | ||
4 | #include <linux/list.h> | |
5 | #include <linux/netfilter.h> | |
67a8fc27 | 6 | #include <linux/netfilter/nfnetlink.h> |
0ca743a5 | 7 | #include <linux/netfilter/x_tables.h> |
96518518 | 8 | #include <linux/netfilter/nf_tables.h> |
ce355e20 | 9 | #include <linux/u64_stats_sync.h> |
96518518 PM |
10 | #include <net/netlink.h> |
11 | ||
20a69341 PM |
12 | #define NFT_JUMP_STACK_SIZE 16 |
13 | ||
96518518 PM |
14 | struct nft_pktinfo { |
15 | struct sk_buff *skb; | |
16 | const struct net_device *in; | |
17 | const struct net_device *out; | |
c9484874 | 18 | const struct nf_hook_ops *ops; |
96518518 PM |
19 | u8 nhoff; |
20 | u8 thoff; | |
4566bf27 | 21 | u8 tprot; |
0ca743a5 PNA |
22 | /* for x_tables compatibility */ |
23 | struct xt_action_param xt; | |
96518518 PM |
24 | }; |
25 | ||
0ca743a5 PNA |
26 | static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
27 | const struct nf_hook_ops *ops, | |
28 | struct sk_buff *skb, | |
29 | const struct net_device *in, | |
30 | const struct net_device *out) | |
31 | { | |
32 | pkt->skb = skb; | |
33 | pkt->in = pkt->xt.in = in; | |
34 | pkt->out = pkt->xt.out = out; | |
c9484874 PM |
35 | pkt->ops = ops; |
36 | pkt->xt.hooknum = ops->hooknum; | |
0ca743a5 PNA |
37 | pkt->xt.family = ops->pf; |
38 | } | |
39 | ||
96518518 PM |
40 | struct nft_data { |
41 | union { | |
42 | u32 data[4]; | |
43 | struct { | |
44 | u32 verdict; | |
45 | struct nft_chain *chain; | |
46 | }; | |
47 | }; | |
48 | } __attribute__((aligned(__alignof__(u64)))); | |
49 | ||
50 | static inline int nft_data_cmp(const struct nft_data *d1, | |
51 | const struct nft_data *d2, | |
52 | unsigned int len) | |
53 | { | |
54 | return memcmp(d1->data, d2->data, len); | |
55 | } | |
56 | ||
57 | static inline void nft_data_copy(struct nft_data *dst, | |
58 | const struct nft_data *src) | |
59 | { | |
60 | BUILD_BUG_ON(__alignof__(*dst) != __alignof__(u64)); | |
61 | *(u64 *)&dst->data[0] = *(u64 *)&src->data[0]; | |
62 | *(u64 *)&dst->data[2] = *(u64 *)&src->data[2]; | |
63 | } | |
64 | ||
65 | static inline void nft_data_debug(const struct nft_data *data) | |
66 | { | |
67 | pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", | |
68 | data->data[0], data->data[1], | |
69 | data->data[2], data->data[3]); | |
70 | } | |
71 | ||
72 | /** | |
20a69341 | 73 | * struct nft_ctx - nf_tables rule/set context |
96518518 | 74 | * |
99633ab2 | 75 | * @net: net namespace |
96518518 PM |
76 | * @afi: address family info |
77 | * @table: the table the chain is contained in | |
78 | * @chain: the chain the rule is contained in | |
0ca743a5 | 79 | * @nla: netlink attributes |
128ad332 PNA |
80 | * @portid: netlink portID of the original message |
81 | * @seq: netlink sequence number | |
82 | * @report: notify via unicast netlink message | |
96518518 PM |
83 | */ |
84 | struct nft_ctx { | |
99633ab2 | 85 | struct net *net; |
7c95f6d8 PNA |
86 | struct nft_af_info *afi; |
87 | struct nft_table *table; | |
88 | struct nft_chain *chain; | |
0ca743a5 | 89 | const struct nlattr * const *nla; |
128ad332 PNA |
90 | u32 portid; |
91 | u32 seq; | |
92 | bool report; | |
96518518 PM |
93 | }; |
94 | ||
96518518 PM |
95 | struct nft_data_desc { |
96 | enum nft_data_types type; | |
97 | unsigned int len; | |
98 | }; | |
99 | ||
5eccdfaa JP |
100 | int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data, |
101 | struct nft_data_desc *desc, const struct nlattr *nla); | |
102 | void nft_data_uninit(const struct nft_data *data, enum nft_data_types type); | |
103 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, | |
104 | enum nft_data_types type, unsigned int len); | |
96518518 PM |
105 | |
106 | static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) | |
107 | { | |
108 | return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; | |
109 | } | |
110 | ||
20a69341 PM |
111 | static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
112 | { | |
113 | return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1; | |
114 | } | |
115 | ||
5eccdfaa JP |
116 | int nft_validate_input_register(enum nft_registers reg); |
117 | int nft_validate_output_register(enum nft_registers reg); | |
118 | int nft_validate_data_load(const struct nft_ctx *ctx, enum nft_registers reg, | |
119 | const struct nft_data *data, | |
120 | enum nft_data_types type); | |
96518518 | 121 | |
86f1ec32 PM |
122 | |
123 | /** | |
124 | * struct nft_userdata - user defined data associated with an object | |
125 | * | |
126 | * @len: length of the data | |
127 | * @data: content | |
128 | * | |
129 | * The presence of user data is indicated in an object specific fashion, | |
130 | * so a length of zero can't occur and the value "len" indicates data | |
131 | * of length len + 1. | |
132 | */ | |
133 | struct nft_userdata { | |
134 | u8 len; | |
135 | unsigned char data[0]; | |
136 | }; | |
137 | ||
20a69341 PM |
138 | /** |
139 | * struct nft_set_elem - generic representation of set elements | |
140 | * | |
141 | * @cookie: implementation specific element cookie | |
142 | * @key: element key | |
143 | * @data: element data (maps only) | |
144 | * @flags: element flags (end of interval) | |
145 | * | |
146 | * The cookie can be used to store a handle to the element for subsequent | |
147 | * removal. | |
148 | */ | |
149 | struct nft_set_elem { | |
150 | void *cookie; | |
151 | struct nft_data key; | |
152 | struct nft_data data; | |
153 | u32 flags; | |
154 | }; | |
155 | ||
156 | struct nft_set; | |
157 | struct nft_set_iter { | |
158 | unsigned int count; | |
159 | unsigned int skip; | |
160 | int err; | |
161 | int (*fn)(const struct nft_ctx *ctx, | |
162 | const struct nft_set *set, | |
163 | const struct nft_set_iter *iter, | |
164 | const struct nft_set_elem *elem); | |
165 | }; | |
166 | ||
c50b960c PM |
167 | /** |
168 | * struct nft_set_desc - description of set elements | |
169 | * | |
170 | * @klen: key length | |
171 | * @dlen: data length | |
172 | * @size: number of set elements | |
173 | */ | |
174 | struct nft_set_desc { | |
175 | unsigned int klen; | |
176 | unsigned int dlen; | |
177 | unsigned int size; | |
178 | }; | |
179 | ||
180 | /** | |
181 | * enum nft_set_class - performance class | |
182 | * | |
183 | * @NFT_LOOKUP_O_1: constant, O(1) | |
184 | * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) | |
185 | * @NFT_LOOKUP_O_N: linear, O(N) | |
186 | */ | |
187 | enum nft_set_class { | |
188 | NFT_SET_CLASS_O_1, | |
189 | NFT_SET_CLASS_O_LOG_N, | |
190 | NFT_SET_CLASS_O_N, | |
191 | }; | |
192 | ||
193 | /** | |
194 | * struct nft_set_estimate - estimation of memory and performance | |
195 | * characteristics | |
196 | * | |
197 | * @size: required memory | |
198 | * @class: lookup performance class | |
199 | */ | |
200 | struct nft_set_estimate { | |
201 | unsigned int size; | |
202 | enum nft_set_class class; | |
203 | }; | |
204 | ||
20a69341 PM |
205 | /** |
206 | * struct nft_set_ops - nf_tables set operations | |
207 | * | |
208 | * @lookup: look up an element within the set | |
209 | * @insert: insert new element into set | |
210 | * @remove: remove element from set | |
211 | * @walk: iterate over all set elemeennts | |
212 | * @privsize: function to return size of set private data | |
213 | * @init: initialize private data of new set instance | |
214 | * @destroy: destroy private data of set instance | |
215 | * @list: nf_tables_set_ops list node | |
216 | * @owner: module reference | |
217 | * @features: features supported by the implementation | |
218 | */ | |
219 | struct nft_set_ops { | |
220 | bool (*lookup)(const struct nft_set *set, | |
221 | const struct nft_data *key, | |
222 | struct nft_data *data); | |
223 | int (*get)(const struct nft_set *set, | |
224 | struct nft_set_elem *elem); | |
225 | int (*insert)(const struct nft_set *set, | |
226 | const struct nft_set_elem *elem); | |
227 | void (*remove)(const struct nft_set *set, | |
228 | const struct nft_set_elem *elem); | |
229 | void (*walk)(const struct nft_ctx *ctx, | |
230 | const struct nft_set *set, | |
231 | struct nft_set_iter *iter); | |
232 | ||
233 | unsigned int (*privsize)(const struct nlattr * const nla[]); | |
c50b960c PM |
234 | bool (*estimate)(const struct nft_set_desc *desc, |
235 | u32 features, | |
236 | struct nft_set_estimate *est); | |
20a69341 | 237 | int (*init)(const struct nft_set *set, |
c50b960c | 238 | const struct nft_set_desc *desc, |
20a69341 PM |
239 | const struct nlattr * const nla[]); |
240 | void (*destroy)(const struct nft_set *set); | |
241 | ||
242 | struct list_head list; | |
243 | struct module *owner; | |
244 | u32 features; | |
245 | }; | |
246 | ||
5eccdfaa JP |
247 | int nft_register_set(struct nft_set_ops *ops); |
248 | void nft_unregister_set(struct nft_set_ops *ops); | |
20a69341 PM |
249 | |
250 | /** | |
251 | * struct nft_set - nf_tables set instance | |
252 | * | |
253 | * @list: table set list node | |
254 | * @bindings: list of set bindings | |
255 | * @name: name of the set | |
256 | * @ktype: key type (numeric type defined by userspace, not used in the kernel) | |
257 | * @dtype: data type (verdict or numeric type defined by userspace) | |
c50b960c PM |
258 | * @size: maximum set size |
259 | * @nelems: number of elements | |
9363dc4b | 260 | * @policy: set parameterization (see enum nft_set_policies) |
20a69341 PM |
261 | * @ops: set ops |
262 | * @flags: set flags | |
263 | * @klen: key length | |
264 | * @dlen: data length | |
265 | * @data: private set data | |
266 | */ | |
267 | struct nft_set { | |
268 | struct list_head list; | |
269 | struct list_head bindings; | |
270 | char name[IFNAMSIZ]; | |
271 | u32 ktype; | |
272 | u32 dtype; | |
c50b960c PM |
273 | u32 size; |
274 | u32 nelems; | |
9363dc4b | 275 | u16 policy; |
20a69341 PM |
276 | /* runtime data below here */ |
277 | const struct nft_set_ops *ops ____cacheline_aligned; | |
278 | u16 flags; | |
279 | u8 klen; | |
280 | u8 dlen; | |
281 | unsigned char data[] | |
282 | __attribute__((aligned(__alignof__(u64)))); | |
283 | }; | |
284 | ||
285 | static inline void *nft_set_priv(const struct nft_set *set) | |
286 | { | |
287 | return (void *)set->data; | |
288 | } | |
289 | ||
5eccdfaa JP |
290 | struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
291 | const struct nlattr *nla); | |
958bee14 PNA |
292 | struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
293 | const struct nlattr *nla); | |
20a69341 PM |
294 | |
295 | /** | |
296 | * struct nft_set_binding - nf_tables set binding | |
297 | * | |
298 | * @list: set bindings list node | |
299 | * @chain: chain containing the rule bound to the set | |
300 | * | |
301 | * A set binding contains all information necessary for validation | |
302 | * of new elements added to a bound set. | |
303 | */ | |
304 | struct nft_set_binding { | |
305 | struct list_head list; | |
306 | const struct nft_chain *chain; | |
307 | }; | |
308 | ||
5eccdfaa JP |
309 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
310 | struct nft_set_binding *binding); | |
311 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, | |
312 | struct nft_set_binding *binding); | |
20a69341 | 313 | |
ef1f7df9 | 314 | |
96518518 | 315 | /** |
ef1f7df9 | 316 | * struct nft_expr_type - nf_tables expression type |
96518518 | 317 | * |
ef1f7df9 PM |
318 | * @select_ops: function to select nft_expr_ops |
319 | * @ops: default ops, used when no select_ops functions is present | |
96518518 PM |
320 | * @list: used internally |
321 | * @name: Identifier | |
322 | * @owner: module reference | |
323 | * @policy: netlink attribute policy | |
324 | * @maxattr: highest netlink attribute number | |
64d46806 | 325 | * @family: address family for AF-specific types |
ef1f7df9 PM |
326 | */ |
327 | struct nft_expr_type { | |
0ca743a5 PNA |
328 | const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
329 | const struct nlattr * const tb[]); | |
ef1f7df9 PM |
330 | const struct nft_expr_ops *ops; |
331 | struct list_head list; | |
332 | const char *name; | |
333 | struct module *owner; | |
334 | const struct nla_policy *policy; | |
335 | unsigned int maxattr; | |
64d46806 | 336 | u8 family; |
ef1f7df9 PM |
337 | }; |
338 | ||
339 | /** | |
340 | * struct nft_expr_ops - nf_tables expression operations | |
341 | * | |
342 | * @eval: Expression evaluation function | |
96518518 | 343 | * @size: full expression size, including private data size |
ef1f7df9 PM |
344 | * @init: initialization function |
345 | * @destroy: destruction function | |
346 | * @dump: function to dump parameters | |
347 | * @type: expression type | |
0ca743a5 PNA |
348 | * @validate: validate expression, called during loop detection |
349 | * @data: extra data to attach to this expression operation | |
96518518 PM |
350 | */ |
351 | struct nft_expr; | |
352 | struct nft_expr_ops { | |
353 | void (*eval)(const struct nft_expr *expr, | |
354 | struct nft_data data[NFT_REG_MAX + 1], | |
355 | const struct nft_pktinfo *pkt); | |
ef1f7df9 PM |
356 | unsigned int size; |
357 | ||
96518518 PM |
358 | int (*init)(const struct nft_ctx *ctx, |
359 | const struct nft_expr *expr, | |
360 | const struct nlattr * const tb[]); | |
62472bce PM |
361 | void (*destroy)(const struct nft_ctx *ctx, |
362 | const struct nft_expr *expr); | |
96518518 PM |
363 | int (*dump)(struct sk_buff *skb, |
364 | const struct nft_expr *expr); | |
0ca743a5 PNA |
365 | int (*validate)(const struct nft_ctx *ctx, |
366 | const struct nft_expr *expr, | |
367 | const struct nft_data **data); | |
ef1f7df9 | 368 | const struct nft_expr_type *type; |
0ca743a5 | 369 | void *data; |
96518518 PM |
370 | }; |
371 | ||
ef1f7df9 | 372 | #define NFT_EXPR_MAXATTR 16 |
96518518 PM |
373 | #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ |
374 | ALIGN(size, __alignof__(struct nft_expr))) | |
375 | ||
376 | /** | |
377 | * struct nft_expr - nf_tables expression | |
378 | * | |
379 | * @ops: expression ops | |
380 | * @data: expression private data | |
381 | */ | |
382 | struct nft_expr { | |
383 | const struct nft_expr_ops *ops; | |
384 | unsigned char data[]; | |
385 | }; | |
386 | ||
387 | static inline void *nft_expr_priv(const struct nft_expr *expr) | |
388 | { | |
389 | return (void *)expr->data; | |
390 | } | |
391 | ||
392 | /** | |
393 | * struct nft_rule - nf_tables rule | |
394 | * | |
395 | * @list: used internally | |
96518518 | 396 | * @handle: rule handle |
0628b123 | 397 | * @genmask: generation mask |
96518518 | 398 | * @dlen: length of expression data |
86f1ec32 | 399 | * @udata: user data is appended to the rule |
96518518 PM |
400 | * @data: expression data |
401 | */ | |
402 | struct nft_rule { | |
403 | struct list_head list; | |
0768b3b3 | 404 | u64 handle:42, |
0628b123 | 405 | genmask:2, |
0768b3b3 | 406 | dlen:12, |
86f1ec32 | 407 | udata:1; |
96518518 PM |
408 | unsigned char data[] |
409 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
410 | }; | |
411 | ||
0628b123 | 412 | /** |
1081d11b | 413 | * struct nft_trans - nf_tables object update in transaction |
0628b123 PNA |
414 | * |
415 | * @list: used internally | |
b380e5c7 | 416 | * @msg_type: message type |
1081d11b PNA |
417 | * @ctx: transaction context |
418 | * @data: internal information related to the transaction | |
0628b123 | 419 | */ |
1081d11b | 420 | struct nft_trans { |
0628b123 | 421 | struct list_head list; |
b380e5c7 | 422 | int msg_type; |
62472bce | 423 | struct nft_ctx ctx; |
1081d11b PNA |
424 | char data[0]; |
425 | }; | |
426 | ||
427 | struct nft_trans_rule { | |
0628b123 | 428 | struct nft_rule *rule; |
0628b123 PNA |
429 | }; |
430 | ||
1081d11b PNA |
431 | #define nft_trans_rule(trans) \ |
432 | (((struct nft_trans_rule *)trans->data)->rule) | |
433 | ||
958bee14 PNA |
434 | struct nft_trans_set { |
435 | struct nft_set *set; | |
436 | u32 set_id; | |
437 | }; | |
438 | ||
439 | #define nft_trans_set(trans) \ | |
440 | (((struct nft_trans_set *)trans->data)->set) | |
441 | #define nft_trans_set_id(trans) \ | |
442 | (((struct nft_trans_set *)trans->data)->set_id) | |
443 | ||
91c7b38d PNA |
444 | struct nft_trans_chain { |
445 | bool update; | |
446 | char name[NFT_CHAIN_MAXNAMELEN]; | |
447 | struct nft_stats __percpu *stats; | |
448 | u8 policy; | |
449 | }; | |
450 | ||
451 | #define nft_trans_chain_update(trans) \ | |
452 | (((struct nft_trans_chain *)trans->data)->update) | |
453 | #define nft_trans_chain_name(trans) \ | |
454 | (((struct nft_trans_chain *)trans->data)->name) | |
455 | #define nft_trans_chain_stats(trans) \ | |
456 | (((struct nft_trans_chain *)trans->data)->stats) | |
457 | #define nft_trans_chain_policy(trans) \ | |
458 | (((struct nft_trans_chain *)trans->data)->policy) | |
459 | ||
55dd6f93 PNA |
460 | struct nft_trans_table { |
461 | bool update; | |
462 | bool enable; | |
463 | }; | |
464 | ||
465 | #define nft_trans_table_update(trans) \ | |
466 | (((struct nft_trans_table *)trans->data)->update) | |
467 | #define nft_trans_table_enable(trans) \ | |
468 | (((struct nft_trans_table *)trans->data)->enable) | |
469 | ||
60319eb1 PNA |
470 | struct nft_trans_elem { |
471 | struct nft_set *set; | |
472 | struct nft_set_elem elem; | |
473 | }; | |
474 | ||
475 | #define nft_trans_elem_set(trans) \ | |
476 | (((struct nft_trans_elem *)trans->data)->set) | |
477 | #define nft_trans_elem(trans) \ | |
478 | (((struct nft_trans_elem *)trans->data)->elem) | |
479 | ||
96518518 PM |
480 | static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) |
481 | { | |
482 | return (struct nft_expr *)&rule->data[0]; | |
483 | } | |
484 | ||
485 | static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) | |
486 | { | |
487 | return ((void *)expr) + expr->ops->size; | |
488 | } | |
489 | ||
490 | static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) | |
491 | { | |
492 | return (struct nft_expr *)&rule->data[rule->dlen]; | |
493 | } | |
494 | ||
86f1ec32 | 495 | static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
0768b3b3 PNA |
496 | { |
497 | return (void *)&rule->data[rule->dlen]; | |
498 | } | |
499 | ||
96518518 PM |
500 | /* |
501 | * The last pointer isn't really necessary, but the compiler isn't able to | |
502 | * determine that the result of nft_expr_last() is always the same since it | |
503 | * can't assume that the dlen value wasn't changed within calls in the loop. | |
504 | */ | |
505 | #define nft_rule_for_each_expr(expr, last, rule) \ | |
506 | for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ | |
507 | (expr) != (last); \ | |
508 | (expr) = nft_expr_next(expr)) | |
509 | ||
510 | enum nft_chain_flags { | |
511 | NFT_BASE_CHAIN = 0x1, | |
91c7b38d | 512 | NFT_CHAIN_INACTIVE = 0x2, |
96518518 PM |
513 | }; |
514 | ||
515 | /** | |
516 | * struct nft_chain - nf_tables chain | |
517 | * | |
518 | * @rules: list of rules in the chain | |
519 | * @list: used internally | |
0628b123 | 520 | * @net: net namespace that this chain belongs to |
b5bc89bf | 521 | * @table: table that this chain belongs to |
96518518 | 522 | * @handle: chain handle |
96518518 PM |
523 | * @use: number of jump references to this chain |
524 | * @level: length of longest path to this chain | |
a0a7379e | 525 | * @flags: bitmask of enum nft_chain_flags |
96518518 PM |
526 | * @name: name of the chain |
527 | */ | |
528 | struct nft_chain { | |
529 | struct list_head rules; | |
530 | struct list_head list; | |
0628b123 | 531 | struct net *net; |
b5bc89bf | 532 | struct nft_table *table; |
96518518 | 533 | u64 handle; |
a0a7379e | 534 | u32 use; |
96518518 | 535 | u16 level; |
a0a7379e | 536 | u8 flags; |
96518518 PM |
537 | char name[NFT_CHAIN_MAXNAMELEN]; |
538 | }; | |
539 | ||
9370761c PNA |
540 | enum nft_chain_type { |
541 | NFT_CHAIN_T_DEFAULT = 0, | |
542 | NFT_CHAIN_T_ROUTE, | |
543 | NFT_CHAIN_T_NAT, | |
544 | NFT_CHAIN_T_MAX | |
545 | }; | |
546 | ||
7210e4e3 PNA |
547 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
548 | enum nft_chain_type type); | |
75e8d06d PNA |
549 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
550 | unsigned int hook_flags); | |
7210e4e3 | 551 | |
0ca743a5 | 552 | struct nft_stats { |
ce355e20 ED |
553 | u64 bytes; |
554 | u64 pkts; | |
555 | struct u64_stats_sync syncp; | |
0ca743a5 PNA |
556 | }; |
557 | ||
115a60b1 PM |
558 | #define NFT_HOOK_OPS_MAX 2 |
559 | ||
96518518 PM |
560 | /** |
561 | * struct nft_base_chain - nf_tables base chain | |
562 | * | |
563 | * @ops: netfilter hook ops | |
9370761c | 564 | * @type: chain type |
0ca743a5 PNA |
565 | * @policy: default policy |
566 | * @stats: per-cpu chain stats | |
96518518 PM |
567 | * @chain: the chain |
568 | */ | |
569 | struct nft_base_chain { | |
115a60b1 | 570 | struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; |
2a37d755 | 571 | const struct nf_chain_type *type; |
0ca743a5 PNA |
572 | u8 policy; |
573 | struct nft_stats __percpu *stats; | |
96518518 PM |
574 | struct nft_chain chain; |
575 | }; | |
576 | ||
577 | static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) | |
578 | { | |
579 | return container_of(chain, struct nft_base_chain, chain); | |
580 | } | |
581 | ||
3876d22d PM |
582 | unsigned int nft_do_chain(struct nft_pktinfo *pkt, |
583 | const struct nf_hook_ops *ops); | |
96518518 | 584 | |
96518518 PM |
585 | /** |
586 | * struct nft_table - nf_tables table | |
587 | * | |
588 | * @list: used internally | |
589 | * @chains: chains in the table | |
590 | * @sets: sets in the table | |
591 | * @hgenerator: handle generator state | |
592 | * @use: number of chain references to this table | |
593 | * @flags: table flag (see enum nft_table_flags) | |
594 | * @name: name of the table | |
595 | */ | |
596 | struct nft_table { | |
597 | struct list_head list; | |
598 | struct list_head chains; | |
599 | struct list_head sets; | |
600 | u64 hgenerator; | |
601 | u32 use; | |
602 | u16 flags; | |
603 | char name[]; | |
604 | }; | |
605 | ||
606 | /** | |
607 | * struct nft_af_info - nf_tables address family info | |
608 | * | |
609 | * @list: used internally | |
610 | * @family: address family | |
611 | * @nhooks: number of hooks in this family | |
612 | * @owner: module owner | |
613 | * @tables: used internally | |
115a60b1 PM |
614 | * @nops: number of hook ops in this family |
615 | * @hook_ops_init: initialization function for chain hook ops | |
96518518 PM |
616 | * @hooks: hookfn overrides for packet validation |
617 | */ | |
618 | struct nft_af_info { | |
619 | struct list_head list; | |
620 | int family; | |
621 | unsigned int nhooks; | |
622 | struct module *owner; | |
623 | struct list_head tables; | |
115a60b1 PM |
624 | unsigned int nops; |
625 | void (*hook_ops_init)(struct nf_hook_ops *, | |
626 | unsigned int); | |
96518518 PM |
627 | nf_hookfn *hooks[NF_MAX_HOOKS]; |
628 | }; | |
629 | ||
5eccdfaa JP |
630 | int nft_register_afinfo(struct net *, struct nft_af_info *); |
631 | void nft_unregister_afinfo(struct nft_af_info *); | |
96518518 | 632 | |
fa2c1de0 PM |
633 | /** |
634 | * struct nf_chain_type - nf_tables chain type info | |
635 | * | |
636 | * @name: name of the type | |
637 | * @type: numeric identifier | |
638 | * @family: address family | |
639 | * @owner: module owner | |
640 | * @hook_mask: mask of valid hooks | |
641 | * @hooks: hookfn overrides | |
642 | */ | |
9370761c | 643 | struct nf_chain_type { |
fa2c1de0 PM |
644 | const char *name; |
645 | enum nft_chain_type type; | |
646 | int family; | |
647 | struct module *owner; | |
648 | unsigned int hook_mask; | |
649 | nf_hookfn *hooks[NF_MAX_HOOKS]; | |
9370761c PNA |
650 | }; |
651 | ||
2a37d755 PM |
652 | int nft_register_chain_type(const struct nf_chain_type *); |
653 | void nft_unregister_chain_type(const struct nf_chain_type *); | |
96518518 | 654 | |
5eccdfaa JP |
655 | int nft_register_expr(struct nft_expr_type *); |
656 | void nft_unregister_expr(struct nft_expr_type *); | |
96518518 | 657 | |
67a8fc27 PM |
658 | #define nft_dereference(p) \ |
659 | nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) | |
660 | ||
96518518 PM |
661 | #define MODULE_ALIAS_NFT_FAMILY(family) \ |
662 | MODULE_ALIAS("nft-afinfo-" __stringify(family)) | |
663 | ||
9370761c PNA |
664 | #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
665 | MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) | |
96518518 | 666 | |
64d46806 PM |
667 | #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
668 | MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) | |
669 | ||
96518518 PM |
670 | #define MODULE_ALIAS_NFT_EXPR(name) \ |
671 | MODULE_ALIAS("nft-expr-" name) | |
672 | ||
20a69341 PM |
673 | #define MODULE_ALIAS_NFT_SET() \ |
674 | MODULE_ALIAS("nft-set") | |
675 | ||
96518518 | 676 | #endif /* _NET_NF_TABLES_H */ |