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