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96518518 PM |
1 | #ifndef _NET_NF_TABLES_H |
2 | #define _NET_NF_TABLES_H | |
3 | ||
0b2d8a7b | 4 | #include <linux/module.h> |
96518518 PM |
5 | #include <linux/list.h> |
6 | #include <linux/netfilter.h> | |
67a8fc27 | 7 | #include <linux/netfilter/nfnetlink.h> |
0ca743a5 | 8 | #include <linux/netfilter/x_tables.h> |
96518518 | 9 | #include <linux/netfilter/nf_tables.h> |
ce355e20 | 10 | #include <linux/u64_stats_sync.h> |
96518518 PM |
11 | #include <net/netlink.h> |
12 | ||
20a69341 PM |
13 | #define NFT_JUMP_STACK_SIZE 16 |
14 | ||
96518518 PM |
15 | struct nft_pktinfo { |
16 | struct sk_buff *skb; | |
46448d00 | 17 | struct net *net; |
96518518 PM |
18 | const struct net_device *in; |
19 | const struct net_device *out; | |
6aa187f2 EB |
20 | u8 pf; |
21 | u8 hook; | |
4566bf27 | 22 | u8 tprot; |
0ca743a5 PNA |
23 | /* for x_tables compatibility */ |
24 | struct xt_action_param xt; | |
96518518 PM |
25 | }; |
26 | ||
0ca743a5 | 27 | static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
0ca743a5 | 28 | struct sk_buff *skb, |
073bfd56 | 29 | const struct nf_hook_state *state) |
0ca743a5 PNA |
30 | { |
31 | pkt->skb = skb; | |
46448d00 | 32 | pkt->net = pkt->xt.net = state->net; |
073bfd56 DM |
33 | pkt->in = pkt->xt.in = state->in; |
34 | pkt->out = pkt->xt.out = state->out; | |
6aa187f2 EB |
35 | pkt->hook = pkt->xt.hooknum = state->hook; |
36 | pkt->pf = pkt->xt.family = state->pf; | |
0ca743a5 PNA |
37 | } |
38 | ||
a55e22e9 PM |
39 | /** |
40 | * struct nft_verdict - nf_tables verdict | |
41 | * | |
42 | * @code: nf_tables/netfilter verdict code | |
43 | * @chain: destination chain for NFT_JUMP/NFT_GOTO | |
44 | */ | |
45 | struct nft_verdict { | |
46 | u32 code; | |
47 | struct nft_chain *chain; | |
48 | }; | |
49 | ||
96518518 PM |
50 | struct nft_data { |
51 | union { | |
1ca2e170 PM |
52 | u32 data[4]; |
53 | struct nft_verdict verdict; | |
96518518 PM |
54 | }; |
55 | } __attribute__((aligned(__alignof__(u64)))); | |
56 | ||
a55e22e9 PM |
57 | /** |
58 | * struct nft_regs - nf_tables register set | |
59 | * | |
60 | * @data: data registers | |
61 | * @verdict: verdict register | |
62 | * | |
63 | * The first four data registers alias to the verdict register. | |
64 | */ | |
65 | struct nft_regs { | |
66 | union { | |
49499c3e | 67 | u32 data[20]; |
a55e22e9 PM |
68 | struct nft_verdict verdict; |
69 | }; | |
70 | }; | |
71 | ||
49499c3e PM |
72 | static inline void nft_data_copy(u32 *dst, const struct nft_data *src, |
73 | unsigned int len) | |
96518518 | 74 | { |
49499c3e | 75 | memcpy(dst, src, len); |
96518518 PM |
76 | } |
77 | ||
78 | static inline void nft_data_debug(const struct nft_data *data) | |
79 | { | |
80 | pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", | |
81 | data->data[0], data->data[1], | |
82 | data->data[2], data->data[3]); | |
83 | } | |
84 | ||
85 | /** | |
20a69341 | 86 | * struct nft_ctx - nf_tables rule/set context |
96518518 | 87 | * |
99633ab2 | 88 | * @net: net namespace |
96518518 PM |
89 | * @afi: address family info |
90 | * @table: the table the chain is contained in | |
91 | * @chain: the chain the rule is contained in | |
0ca743a5 | 92 | * @nla: netlink attributes |
128ad332 PNA |
93 | * @portid: netlink portID of the original message |
94 | * @seq: netlink sequence number | |
95 | * @report: notify via unicast netlink message | |
96518518 PM |
96 | */ |
97 | struct nft_ctx { | |
99633ab2 | 98 | struct net *net; |
7c95f6d8 PNA |
99 | struct nft_af_info *afi; |
100 | struct nft_table *table; | |
101 | struct nft_chain *chain; | |
0ca743a5 | 102 | const struct nlattr * const *nla; |
128ad332 PNA |
103 | u32 portid; |
104 | u32 seq; | |
105 | bool report; | |
96518518 PM |
106 | }; |
107 | ||
96518518 PM |
108 | struct nft_data_desc { |
109 | enum nft_data_types type; | |
110 | unsigned int len; | |
111 | }; | |
112 | ||
d0a11fc3 PM |
113 | int nft_data_init(const struct nft_ctx *ctx, |
114 | struct nft_data *data, unsigned int size, | |
5eccdfaa JP |
115 | struct nft_data_desc *desc, const struct nlattr *nla); |
116 | void nft_data_uninit(const struct nft_data *data, enum nft_data_types type); | |
117 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, | |
118 | enum nft_data_types type, unsigned int len); | |
96518518 PM |
119 | |
120 | static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) | |
121 | { | |
122 | return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; | |
123 | } | |
124 | ||
20a69341 PM |
125 | static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
126 | { | |
bf798657 | 127 | return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; |
20a69341 PM |
128 | } |
129 | ||
b1c96ed3 PM |
130 | unsigned int nft_parse_register(const struct nlattr *attr); |
131 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); | |
132 | ||
d07db988 | 133 | int nft_validate_register_load(enum nft_registers reg, unsigned int len); |
1ec10212 PM |
134 | int nft_validate_register_store(const struct nft_ctx *ctx, |
135 | enum nft_registers reg, | |
136 | const struct nft_data *data, | |
137 | enum nft_data_types type, unsigned int len); | |
96518518 | 138 | |
86f1ec32 PM |
139 | /** |
140 | * struct nft_userdata - user defined data associated with an object | |
141 | * | |
142 | * @len: length of the data | |
143 | * @data: content | |
144 | * | |
145 | * The presence of user data is indicated in an object specific fashion, | |
146 | * so a length of zero can't occur and the value "len" indicates data | |
147 | * of length len + 1. | |
148 | */ | |
149 | struct nft_userdata { | |
150 | u8 len; | |
151 | unsigned char data[0]; | |
152 | }; | |
153 | ||
20a69341 PM |
154 | /** |
155 | * struct nft_set_elem - generic representation of set elements | |
156 | * | |
20a69341 | 157 | * @key: element key |
fe2811eb | 158 | * @priv: element private data and extensions |
20a69341 PM |
159 | */ |
160 | struct nft_set_elem { | |
7d740264 PM |
161 | union { |
162 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
163 | struct nft_data val; | |
164 | } key; | |
fe2811eb | 165 | void *priv; |
20a69341 PM |
166 | }; |
167 | ||
168 | struct nft_set; | |
169 | struct nft_set_iter { | |
170 | unsigned int count; | |
171 | unsigned int skip; | |
172 | int err; | |
173 | int (*fn)(const struct nft_ctx *ctx, | |
174 | const struct nft_set *set, | |
175 | const struct nft_set_iter *iter, | |
176 | const struct nft_set_elem *elem); | |
177 | }; | |
178 | ||
c50b960c PM |
179 | /** |
180 | * struct nft_set_desc - description of set elements | |
181 | * | |
182 | * @klen: key length | |
183 | * @dlen: data length | |
184 | * @size: number of set elements | |
185 | */ | |
186 | struct nft_set_desc { | |
187 | unsigned int klen; | |
188 | unsigned int dlen; | |
189 | unsigned int size; | |
190 | }; | |
191 | ||
192 | /** | |
193 | * enum nft_set_class - performance class | |
194 | * | |
195 | * @NFT_LOOKUP_O_1: constant, O(1) | |
196 | * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) | |
197 | * @NFT_LOOKUP_O_N: linear, O(N) | |
198 | */ | |
199 | enum nft_set_class { | |
200 | NFT_SET_CLASS_O_1, | |
201 | NFT_SET_CLASS_O_LOG_N, | |
202 | NFT_SET_CLASS_O_N, | |
203 | }; | |
204 | ||
205 | /** | |
206 | * struct nft_set_estimate - estimation of memory and performance | |
207 | * characteristics | |
208 | * | |
209 | * @size: required memory | |
210 | * @class: lookup performance class | |
211 | */ | |
212 | struct nft_set_estimate { | |
213 | unsigned int size; | |
214 | enum nft_set_class class; | |
215 | }; | |
216 | ||
b2832dd6 | 217 | struct nft_set_ext; |
22fe54d5 | 218 | struct nft_expr; |
b2832dd6 | 219 | |
20a69341 PM |
220 | /** |
221 | * struct nft_set_ops - nf_tables set operations | |
222 | * | |
223 | * @lookup: look up an element within the set | |
224 | * @insert: insert new element into set | |
cc02e457 PM |
225 | * @activate: activate new element in the next generation |
226 | * @deactivate: deactivate element in the next generation | |
20a69341 PM |
227 | * @remove: remove element from set |
228 | * @walk: iterate over all set elemeennts | |
229 | * @privsize: function to return size of set private data | |
230 | * @init: initialize private data of new set instance | |
231 | * @destroy: destroy private data of set instance | |
232 | * @list: nf_tables_set_ops list node | |
233 | * @owner: module reference | |
fe2811eb | 234 | * @elemsize: element private size |
20a69341 PM |
235 | * @features: features supported by the implementation |
236 | */ | |
237 | struct nft_set_ops { | |
238 | bool (*lookup)(const struct nft_set *set, | |
8cd8937a | 239 | const u32 *key, |
b2832dd6 | 240 | const struct nft_set_ext **ext); |
22fe54d5 | 241 | bool (*update)(struct nft_set *set, |
8cd8937a | 242 | const u32 *key, |
22fe54d5 PM |
243 | void *(*new)(struct nft_set *, |
244 | const struct nft_expr *, | |
a55e22e9 | 245 | struct nft_regs *), |
22fe54d5 | 246 | const struct nft_expr *expr, |
a55e22e9 | 247 | struct nft_regs *regs, |
22fe54d5 PM |
248 | const struct nft_set_ext **ext); |
249 | ||
20a69341 PM |
250 | int (*insert)(const struct nft_set *set, |
251 | const struct nft_set_elem *elem); | |
cc02e457 PM |
252 | void (*activate)(const struct nft_set *set, |
253 | const struct nft_set_elem *elem); | |
254 | void * (*deactivate)(const struct nft_set *set, | |
255 | const struct nft_set_elem *elem); | |
20a69341 PM |
256 | void (*remove)(const struct nft_set *set, |
257 | const struct nft_set_elem *elem); | |
258 | void (*walk)(const struct nft_ctx *ctx, | |
259 | const struct nft_set *set, | |
260 | struct nft_set_iter *iter); | |
261 | ||
262 | unsigned int (*privsize)(const struct nlattr * const nla[]); | |
c50b960c PM |
263 | bool (*estimate)(const struct nft_set_desc *desc, |
264 | u32 features, | |
265 | struct nft_set_estimate *est); | |
20a69341 | 266 | int (*init)(const struct nft_set *set, |
c50b960c | 267 | const struct nft_set_desc *desc, |
20a69341 PM |
268 | const struct nlattr * const nla[]); |
269 | void (*destroy)(const struct nft_set *set); | |
270 | ||
271 | struct list_head list; | |
272 | struct module *owner; | |
fe2811eb | 273 | unsigned int elemsize; |
20a69341 PM |
274 | u32 features; |
275 | }; | |
276 | ||
5eccdfaa JP |
277 | int nft_register_set(struct nft_set_ops *ops); |
278 | void nft_unregister_set(struct nft_set_ops *ops); | |
20a69341 PM |
279 | |
280 | /** | |
281 | * struct nft_set - nf_tables set instance | |
282 | * | |
283 | * @list: table set list node | |
284 | * @bindings: list of set bindings | |
285 | * @name: name of the set | |
286 | * @ktype: key type (numeric type defined by userspace, not used in the kernel) | |
287 | * @dtype: data type (verdict or numeric type defined by userspace) | |
c50b960c PM |
288 | * @size: maximum set size |
289 | * @nelems: number of elements | |
3dd0673a | 290 | * @ndeact: number of deactivated elements queued for removal |
761da293 PM |
291 | * @timeout: default timeout value in msecs |
292 | * @gc_int: garbage collection interval in msecs | |
9363dc4b | 293 | * @policy: set parameterization (see enum nft_set_policies) |
20a69341 | 294 | * @ops: set ops |
cc02e457 | 295 | * @pnet: network namespace |
20a69341 PM |
296 | * @flags: set flags |
297 | * @klen: key length | |
298 | * @dlen: data length | |
299 | * @data: private set data | |
300 | */ | |
301 | struct nft_set { | |
302 | struct list_head list; | |
303 | struct list_head bindings; | |
304 | char name[IFNAMSIZ]; | |
305 | u32 ktype; | |
306 | u32 dtype; | |
c50b960c | 307 | u32 size; |
3dd0673a PM |
308 | atomic_t nelems; |
309 | u32 ndeact; | |
761da293 PM |
310 | u64 timeout; |
311 | u32 gc_int; | |
9363dc4b | 312 | u16 policy; |
20a69341 PM |
313 | /* runtime data below here */ |
314 | const struct nft_set_ops *ops ____cacheline_aligned; | |
cc02e457 | 315 | possible_net_t pnet; |
20a69341 PM |
316 | u16 flags; |
317 | u8 klen; | |
318 | u8 dlen; | |
319 | unsigned char data[] | |
320 | __attribute__((aligned(__alignof__(u64)))); | |
321 | }; | |
322 | ||
323 | static inline void *nft_set_priv(const struct nft_set *set) | |
324 | { | |
325 | return (void *)set->data; | |
326 | } | |
327 | ||
9d098292 PM |
328 | static inline struct nft_set *nft_set_container_of(const void *priv) |
329 | { | |
330 | return (void *)priv - offsetof(struct nft_set, data); | |
331 | } | |
332 | ||
5eccdfaa JP |
333 | struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
334 | const struct nlattr *nla); | |
958bee14 PNA |
335 | struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
336 | const struct nlattr *nla); | |
20a69341 | 337 | |
761da293 PM |
338 | static inline unsigned long nft_set_gc_interval(const struct nft_set *set) |
339 | { | |
340 | return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; | |
341 | } | |
342 | ||
20a69341 PM |
343 | /** |
344 | * struct nft_set_binding - nf_tables set binding | |
345 | * | |
346 | * @list: set bindings list node | |
347 | * @chain: chain containing the rule bound to the set | |
11113e19 | 348 | * @flags: set action flags |
20a69341 PM |
349 | * |
350 | * A set binding contains all information necessary for validation | |
351 | * of new elements added to a bound set. | |
352 | */ | |
353 | struct nft_set_binding { | |
354 | struct list_head list; | |
355 | const struct nft_chain *chain; | |
11113e19 | 356 | u32 flags; |
20a69341 PM |
357 | }; |
358 | ||
5eccdfaa JP |
359 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
360 | struct nft_set_binding *binding); | |
361 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, | |
362 | struct nft_set_binding *binding); | |
20a69341 | 363 | |
3ac4c07a PM |
364 | /** |
365 | * enum nft_set_extensions - set extension type IDs | |
366 | * | |
367 | * @NFT_SET_EXT_KEY: element key | |
368 | * @NFT_SET_EXT_DATA: mapping data | |
369 | * @NFT_SET_EXT_FLAGS: element flags | |
c3e1b005 PM |
370 | * @NFT_SET_EXT_TIMEOUT: element timeout |
371 | * @NFT_SET_EXT_EXPIRATION: element expiration time | |
68e942e8 | 372 | * @NFT_SET_EXT_USERDATA: user data associated with the element |
f25ad2e9 | 373 | * @NFT_SET_EXT_EXPR: expression assiociated with the element |
3ac4c07a PM |
374 | * @NFT_SET_EXT_NUM: number of extension types |
375 | */ | |
376 | enum nft_set_extensions { | |
377 | NFT_SET_EXT_KEY, | |
378 | NFT_SET_EXT_DATA, | |
379 | NFT_SET_EXT_FLAGS, | |
c3e1b005 PM |
380 | NFT_SET_EXT_TIMEOUT, |
381 | NFT_SET_EXT_EXPIRATION, | |
68e942e8 | 382 | NFT_SET_EXT_USERDATA, |
f25ad2e9 | 383 | NFT_SET_EXT_EXPR, |
3ac4c07a PM |
384 | NFT_SET_EXT_NUM |
385 | }; | |
386 | ||
387 | /** | |
388 | * struct nft_set_ext_type - set extension type | |
389 | * | |
390 | * @len: fixed part length of the extension | |
391 | * @align: alignment requirements of the extension | |
392 | */ | |
393 | struct nft_set_ext_type { | |
394 | u8 len; | |
395 | u8 align; | |
396 | }; | |
397 | ||
398 | extern const struct nft_set_ext_type nft_set_ext_types[]; | |
399 | ||
400 | /** | |
401 | * struct nft_set_ext_tmpl - set extension template | |
402 | * | |
403 | * @len: length of extension area | |
404 | * @offset: offsets of individual extension types | |
405 | */ | |
406 | struct nft_set_ext_tmpl { | |
407 | u16 len; | |
408 | u8 offset[NFT_SET_EXT_NUM]; | |
409 | }; | |
410 | ||
411 | /** | |
412 | * struct nft_set_ext - set extensions | |
413 | * | |
cc02e457 | 414 | * @genmask: generation mask |
3ac4c07a PM |
415 | * @offset: offsets of individual extension types |
416 | * @data: beginning of extension data | |
417 | */ | |
418 | struct nft_set_ext { | |
cc02e457 | 419 | u8 genmask; |
3ac4c07a PM |
420 | u8 offset[NFT_SET_EXT_NUM]; |
421 | char data[0]; | |
422 | }; | |
423 | ||
424 | static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) | |
425 | { | |
426 | memset(tmpl, 0, sizeof(*tmpl)); | |
427 | tmpl->len = sizeof(struct nft_set_ext); | |
428 | } | |
429 | ||
430 | static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, | |
431 | unsigned int len) | |
432 | { | |
433 | tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); | |
434 | BUG_ON(tmpl->len > U8_MAX); | |
435 | tmpl->offset[id] = tmpl->len; | |
436 | tmpl->len += nft_set_ext_types[id].len + len; | |
437 | } | |
438 | ||
439 | static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) | |
440 | { | |
441 | nft_set_ext_add_length(tmpl, id, 0); | |
442 | } | |
443 | ||
444 | static inline void nft_set_ext_init(struct nft_set_ext *ext, | |
445 | const struct nft_set_ext_tmpl *tmpl) | |
446 | { | |
447 | memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); | |
448 | } | |
449 | ||
450 | static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
451 | { | |
452 | return !!ext->offset[id]; | |
453 | } | |
454 | ||
455 | static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
456 | { | |
457 | return ext && __nft_set_ext_exists(ext, id); | |
458 | } | |
459 | ||
460 | static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) | |
461 | { | |
462 | return (void *)ext + ext->offset[id]; | |
463 | } | |
464 | ||
465 | static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) | |
466 | { | |
467 | return nft_set_ext(ext, NFT_SET_EXT_KEY); | |
468 | } | |
469 | ||
470 | static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) | |
471 | { | |
472 | return nft_set_ext(ext, NFT_SET_EXT_DATA); | |
473 | } | |
474 | ||
475 | static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) | |
476 | { | |
477 | return nft_set_ext(ext, NFT_SET_EXT_FLAGS); | |
478 | } | |
ef1f7df9 | 479 | |
c3e1b005 PM |
480 | static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) |
481 | { | |
482 | return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); | |
483 | } | |
484 | ||
485 | static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) | |
486 | { | |
487 | return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); | |
488 | } | |
489 | ||
68e942e8 PM |
490 | static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) |
491 | { | |
492 | return nft_set_ext(ext, NFT_SET_EXT_USERDATA); | |
493 | } | |
494 | ||
f25ad2e9 PM |
495 | static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) |
496 | { | |
497 | return nft_set_ext(ext, NFT_SET_EXT_EXPR); | |
498 | } | |
499 | ||
c3e1b005 PM |
500 | static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) |
501 | { | |
502 | return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && | |
503 | time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); | |
504 | } | |
505 | ||
fe2811eb PM |
506 | static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, |
507 | void *elem) | |
508 | { | |
509 | return elem + set->ops->elemsize; | |
510 | } | |
511 | ||
22fe54d5 PM |
512 | void *nft_set_elem_init(const struct nft_set *set, |
513 | const struct nft_set_ext_tmpl *tmpl, | |
49499c3e | 514 | const u32 *key, const u32 *data, |
22fe54d5 | 515 | u64 timeout, gfp_t gfp); |
61edafbb PM |
516 | void nft_set_elem_destroy(const struct nft_set *set, void *elem); |
517 | ||
cfed7e1b PM |
518 | /** |
519 | * struct nft_set_gc_batch_head - nf_tables set garbage collection batch | |
520 | * | |
521 | * @rcu: rcu head | |
522 | * @set: set the elements belong to | |
523 | * @cnt: count of elements | |
524 | */ | |
525 | struct nft_set_gc_batch_head { | |
526 | struct rcu_head rcu; | |
527 | const struct nft_set *set; | |
528 | unsigned int cnt; | |
529 | }; | |
530 | ||
531 | #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ | |
532 | sizeof(struct nft_set_gc_batch_head)) / \ | |
533 | sizeof(void *)) | |
534 | ||
535 | /** | |
536 | * struct nft_set_gc_batch - nf_tables set garbage collection batch | |
537 | * | |
538 | * @head: GC batch head | |
539 | * @elems: garbage collection elements | |
540 | */ | |
541 | struct nft_set_gc_batch { | |
542 | struct nft_set_gc_batch_head head; | |
543 | void *elems[NFT_SET_GC_BATCH_SIZE]; | |
544 | }; | |
545 | ||
546 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, | |
547 | gfp_t gfp); | |
548 | void nft_set_gc_batch_release(struct rcu_head *rcu); | |
549 | ||
550 | static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) | |
551 | { | |
552 | if (gcb != NULL) | |
553 | call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); | |
554 | } | |
555 | ||
556 | static inline struct nft_set_gc_batch * | |
557 | nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, | |
558 | gfp_t gfp) | |
559 | { | |
560 | if (gcb != NULL) { | |
561 | if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) | |
562 | return gcb; | |
563 | nft_set_gc_batch_complete(gcb); | |
564 | } | |
565 | return nft_set_gc_batch_alloc(set, gfp); | |
566 | } | |
567 | ||
568 | static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, | |
569 | void *elem) | |
570 | { | |
571 | gcb->elems[gcb->head.cnt++] = elem; | |
572 | } | |
573 | ||
96518518 | 574 | /** |
ef1f7df9 | 575 | * struct nft_expr_type - nf_tables expression type |
96518518 | 576 | * |
ef1f7df9 PM |
577 | * @select_ops: function to select nft_expr_ops |
578 | * @ops: default ops, used when no select_ops functions is present | |
96518518 PM |
579 | * @list: used internally |
580 | * @name: Identifier | |
581 | * @owner: module reference | |
582 | * @policy: netlink attribute policy | |
583 | * @maxattr: highest netlink attribute number | |
64d46806 | 584 | * @family: address family for AF-specific types |
151d799a | 585 | * @flags: expression type flags |
ef1f7df9 PM |
586 | */ |
587 | struct nft_expr_type { | |
0ca743a5 PNA |
588 | const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
589 | const struct nlattr * const tb[]); | |
ef1f7df9 PM |
590 | const struct nft_expr_ops *ops; |
591 | struct list_head list; | |
592 | const char *name; | |
593 | struct module *owner; | |
594 | const struct nla_policy *policy; | |
595 | unsigned int maxattr; | |
64d46806 | 596 | u8 family; |
151d799a | 597 | u8 flags; |
ef1f7df9 PM |
598 | }; |
599 | ||
151d799a PM |
600 | #define NFT_EXPR_STATEFUL 0x1 |
601 | ||
ef1f7df9 PM |
602 | /** |
603 | * struct nft_expr_ops - nf_tables expression operations | |
604 | * | |
605 | * @eval: Expression evaluation function | |
96518518 | 606 | * @size: full expression size, including private data size |
ef1f7df9 PM |
607 | * @init: initialization function |
608 | * @destroy: destruction function | |
609 | * @dump: function to dump parameters | |
610 | * @type: expression type | |
0ca743a5 PNA |
611 | * @validate: validate expression, called during loop detection |
612 | * @data: extra data to attach to this expression operation | |
96518518 PM |
613 | */ |
614 | struct nft_expr; | |
615 | struct nft_expr_ops { | |
616 | void (*eval)(const struct nft_expr *expr, | |
a55e22e9 | 617 | struct nft_regs *regs, |
96518518 | 618 | const struct nft_pktinfo *pkt); |
086f3321 PNA |
619 | int (*clone)(struct nft_expr *dst, |
620 | const struct nft_expr *src); | |
ef1f7df9 PM |
621 | unsigned int size; |
622 | ||
96518518 PM |
623 | int (*init)(const struct nft_ctx *ctx, |
624 | const struct nft_expr *expr, | |
625 | const struct nlattr * const tb[]); | |
62472bce PM |
626 | void (*destroy)(const struct nft_ctx *ctx, |
627 | const struct nft_expr *expr); | |
96518518 PM |
628 | int (*dump)(struct sk_buff *skb, |
629 | const struct nft_expr *expr); | |
0ca743a5 PNA |
630 | int (*validate)(const struct nft_ctx *ctx, |
631 | const struct nft_expr *expr, | |
632 | const struct nft_data **data); | |
ef1f7df9 | 633 | const struct nft_expr_type *type; |
0ca743a5 | 634 | void *data; |
96518518 PM |
635 | }; |
636 | ||
ef1f7df9 | 637 | #define NFT_EXPR_MAXATTR 16 |
96518518 PM |
638 | #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ |
639 | ALIGN(size, __alignof__(struct nft_expr))) | |
640 | ||
641 | /** | |
642 | * struct nft_expr - nf_tables expression | |
643 | * | |
644 | * @ops: expression ops | |
645 | * @data: expression private data | |
646 | */ | |
647 | struct nft_expr { | |
648 | const struct nft_expr_ops *ops; | |
649 | unsigned char data[]; | |
650 | }; | |
651 | ||
652 | static inline void *nft_expr_priv(const struct nft_expr *expr) | |
653 | { | |
654 | return (void *)expr->data; | |
655 | } | |
656 | ||
0b2d8a7b PM |
657 | struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, |
658 | const struct nlattr *nla); | |
659 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); | |
660 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, | |
661 | const struct nft_expr *expr); | |
662 | ||
086f3321 | 663 | static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) |
0b2d8a7b | 664 | { |
086f3321 PNA |
665 | int err; |
666 | ||
0b2d8a7b | 667 | __module_get(src->ops->type->owner); |
086f3321 PNA |
668 | if (src->ops->clone) { |
669 | dst->ops = src->ops; | |
670 | err = src->ops->clone(dst, src); | |
671 | if (err < 0) | |
672 | return err; | |
673 | } else { | |
674 | memcpy(dst, src, src->ops->size); | |
675 | } | |
676 | return 0; | |
0b2d8a7b PM |
677 | } |
678 | ||
96518518 PM |
679 | /** |
680 | * struct nft_rule - nf_tables rule | |
681 | * | |
682 | * @list: used internally | |
96518518 | 683 | * @handle: rule handle |
0628b123 | 684 | * @genmask: generation mask |
96518518 | 685 | * @dlen: length of expression data |
86f1ec32 | 686 | * @udata: user data is appended to the rule |
96518518 PM |
687 | * @data: expression data |
688 | */ | |
689 | struct nft_rule { | |
690 | struct list_head list; | |
0768b3b3 | 691 | u64 handle:42, |
0628b123 | 692 | genmask:2, |
0768b3b3 | 693 | dlen:12, |
86f1ec32 | 694 | udata:1; |
96518518 PM |
695 | unsigned char data[] |
696 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
697 | }; | |
698 | ||
699 | static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) | |
700 | { | |
701 | return (struct nft_expr *)&rule->data[0]; | |
702 | } | |
703 | ||
704 | static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) | |
705 | { | |
706 | return ((void *)expr) + expr->ops->size; | |
707 | } | |
708 | ||
709 | static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) | |
710 | { | |
711 | return (struct nft_expr *)&rule->data[rule->dlen]; | |
712 | } | |
713 | ||
86f1ec32 | 714 | static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
0768b3b3 PNA |
715 | { |
716 | return (void *)&rule->data[rule->dlen]; | |
717 | } | |
718 | ||
96518518 PM |
719 | /* |
720 | * The last pointer isn't really necessary, but the compiler isn't able to | |
721 | * determine that the result of nft_expr_last() is always the same since it | |
722 | * can't assume that the dlen value wasn't changed within calls in the loop. | |
723 | */ | |
724 | #define nft_rule_for_each_expr(expr, last, rule) \ | |
725 | for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ | |
726 | (expr) != (last); \ | |
727 | (expr) = nft_expr_next(expr)) | |
728 | ||
729 | enum nft_chain_flags { | |
730 | NFT_BASE_CHAIN = 0x1, | |
91c7b38d | 731 | NFT_CHAIN_INACTIVE = 0x2, |
96518518 PM |
732 | }; |
733 | ||
734 | /** | |
735 | * struct nft_chain - nf_tables chain | |
736 | * | |
737 | * @rules: list of rules in the chain | |
738 | * @list: used internally | |
b5bc89bf | 739 | * @table: table that this chain belongs to |
96518518 | 740 | * @handle: chain handle |
96518518 PM |
741 | * @use: number of jump references to this chain |
742 | * @level: length of longest path to this chain | |
a0a7379e | 743 | * @flags: bitmask of enum nft_chain_flags |
96518518 PM |
744 | * @name: name of the chain |
745 | */ | |
746 | struct nft_chain { | |
747 | struct list_head rules; | |
748 | struct list_head list; | |
b5bc89bf | 749 | struct nft_table *table; |
96518518 | 750 | u64 handle; |
a0a7379e | 751 | u32 use; |
96518518 | 752 | u16 level; |
a0a7379e | 753 | u8 flags; |
96518518 PM |
754 | char name[NFT_CHAIN_MAXNAMELEN]; |
755 | }; | |
756 | ||
9370761c PNA |
757 | enum nft_chain_type { |
758 | NFT_CHAIN_T_DEFAULT = 0, | |
759 | NFT_CHAIN_T_ROUTE, | |
760 | NFT_CHAIN_T_NAT, | |
761 | NFT_CHAIN_T_MAX | |
762 | }; | |
763 | ||
1a1e1a12 PM |
764 | /** |
765 | * struct nf_chain_type - nf_tables chain type info | |
766 | * | |
767 | * @name: name of the type | |
768 | * @type: numeric identifier | |
769 | * @family: address family | |
770 | * @owner: module owner | |
771 | * @hook_mask: mask of valid hooks | |
772 | * @hooks: hookfn overrides | |
773 | */ | |
774 | struct nf_chain_type { | |
775 | const char *name; | |
776 | enum nft_chain_type type; | |
777 | int family; | |
778 | struct module *owner; | |
779 | unsigned int hook_mask; | |
780 | nf_hookfn *hooks[NF_MAX_HOOKS]; | |
781 | }; | |
782 | ||
7210e4e3 PNA |
783 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
784 | enum nft_chain_type type); | |
75e8d06d PNA |
785 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
786 | unsigned int hook_flags); | |
7210e4e3 | 787 | |
0ca743a5 | 788 | struct nft_stats { |
ce355e20 ED |
789 | u64 bytes; |
790 | u64 pkts; | |
791 | struct u64_stats_sync syncp; | |
0ca743a5 PNA |
792 | }; |
793 | ||
115a60b1 | 794 | #define NFT_HOOK_OPS_MAX 2 |
835b8033 | 795 | #define NFT_BASECHAIN_DISABLED (1 << 0) |
115a60b1 | 796 | |
96518518 PM |
797 | /** |
798 | * struct nft_base_chain - nf_tables base chain | |
799 | * | |
800 | * @ops: netfilter hook ops | |
5ebb335d | 801 | * @pnet: net namespace that this chain belongs to |
9370761c | 802 | * @type: chain type |
0ca743a5 PNA |
803 | * @policy: default policy |
804 | * @stats: per-cpu chain stats | |
96518518 | 805 | * @chain: the chain |
2cbce139 | 806 | * @dev_name: device name that this base chain is attached to (if any) |
96518518 PM |
807 | */ |
808 | struct nft_base_chain { | |
115a60b1 | 809 | struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; |
5ebb335d | 810 | possible_net_t pnet; |
2a37d755 | 811 | const struct nf_chain_type *type; |
0ca743a5 | 812 | u8 policy; |
835b8033 | 813 | u8 flags; |
0ca743a5 | 814 | struct nft_stats __percpu *stats; |
96518518 | 815 | struct nft_chain chain; |
2cbce139 | 816 | char dev_name[IFNAMSIZ]; |
96518518 PM |
817 | }; |
818 | ||
819 | static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) | |
820 | { | |
821 | return container_of(chain, struct nft_base_chain, chain); | |
822 | } | |
823 | ||
5ebe0b0e | 824 | int __nft_release_basechain(struct nft_ctx *ctx); |
835b8033 | 825 | |
06198b34 | 826 | unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); |
96518518 | 827 | |
96518518 PM |
828 | /** |
829 | * struct nft_table - nf_tables table | |
830 | * | |
831 | * @list: used internally | |
832 | * @chains: chains in the table | |
833 | * @sets: sets in the table | |
834 | * @hgenerator: handle generator state | |
835 | * @use: number of chain references to this table | |
836 | * @flags: table flag (see enum nft_table_flags) | |
837 | * @name: name of the table | |
838 | */ | |
839 | struct nft_table { | |
840 | struct list_head list; | |
841 | struct list_head chains; | |
842 | struct list_head sets; | |
843 | u64 hgenerator; | |
844 | u32 use; | |
845 | u16 flags; | |
1cae565e | 846 | char name[NFT_TABLE_MAXNAMELEN]; |
ebddf1a8 PNA |
847 | }; |
848 | ||
849 | enum nft_af_flags { | |
850 | NFT_AF_NEEDS_DEV = (1 << 0), | |
96518518 PM |
851 | }; |
852 | ||
853 | /** | |
854 | * struct nft_af_info - nf_tables address family info | |
855 | * | |
856 | * @list: used internally | |
857 | * @family: address family | |
858 | * @nhooks: number of hooks in this family | |
859 | * @owner: module owner | |
860 | * @tables: used internally | |
ebddf1a8 | 861 | * @flags: family flags |
115a60b1 PM |
862 | * @nops: number of hook ops in this family |
863 | * @hook_ops_init: initialization function for chain hook ops | |
96518518 PM |
864 | * @hooks: hookfn overrides for packet validation |
865 | */ | |
866 | struct nft_af_info { | |
867 | struct list_head list; | |
868 | int family; | |
869 | unsigned int nhooks; | |
870 | struct module *owner; | |
871 | struct list_head tables; | |
ebddf1a8 | 872 | u32 flags; |
115a60b1 PM |
873 | unsigned int nops; |
874 | void (*hook_ops_init)(struct nf_hook_ops *, | |
875 | unsigned int); | |
96518518 PM |
876 | nf_hookfn *hooks[NF_MAX_HOOKS]; |
877 | }; | |
878 | ||
5eccdfaa | 879 | int nft_register_afinfo(struct net *, struct nft_af_info *); |
df05ef87 | 880 | void nft_unregister_afinfo(struct net *, struct nft_af_info *); |
96518518 | 881 | |
2a37d755 PM |
882 | int nft_register_chain_type(const struct nf_chain_type *); |
883 | void nft_unregister_chain_type(const struct nf_chain_type *); | |
96518518 | 884 | |
5eccdfaa JP |
885 | int nft_register_expr(struct nft_expr_type *); |
886 | void nft_unregister_expr(struct nft_expr_type *); | |
96518518 | 887 | |
33d5a7b1 FW |
888 | int nft_verdict_dump(struct sk_buff *skb, int type, |
889 | const struct nft_verdict *v); | |
890 | ||
891 | /** | |
892 | * struct nft_traceinfo - nft tracing information and state | |
893 | * | |
894 | * @pkt: pktinfo currently processed | |
895 | * @basechain: base chain currently processed | |
896 | * @chain: chain currently processed | |
897 | * @rule: rule that was evaluated | |
898 | * @verdict: verdict given by rule | |
899 | * @type: event type (enum nft_trace_types) | |
900 | * @packet_dumped: packet headers sent in a previous traceinfo message | |
901 | * @trace: other struct members are initialised | |
902 | */ | |
903 | struct nft_traceinfo { | |
904 | const struct nft_pktinfo *pkt; | |
905 | const struct nft_base_chain *basechain; | |
906 | const struct nft_chain *chain; | |
907 | const struct nft_rule *rule; | |
908 | const struct nft_verdict *verdict; | |
909 | enum nft_trace_types type; | |
910 | bool packet_dumped; | |
911 | bool trace; | |
912 | }; | |
913 | ||
914 | void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, | |
915 | const struct nft_verdict *verdict, | |
916 | const struct nft_chain *basechain); | |
917 | ||
918 | void nft_trace_notify(struct nft_traceinfo *info); | |
919 | ||
67a8fc27 PM |
920 | #define nft_dereference(p) \ |
921 | nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) | |
922 | ||
96518518 PM |
923 | #define MODULE_ALIAS_NFT_FAMILY(family) \ |
924 | MODULE_ALIAS("nft-afinfo-" __stringify(family)) | |
925 | ||
9370761c PNA |
926 | #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
927 | MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) | |
96518518 | 928 | |
64d46806 PM |
929 | #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
930 | MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) | |
931 | ||
96518518 PM |
932 | #define MODULE_ALIAS_NFT_EXPR(name) \ |
933 | MODULE_ALIAS("nft-expr-" name) | |
934 | ||
20a69341 PM |
935 | #define MODULE_ALIAS_NFT_SET() \ |
936 | MODULE_ALIAS("nft-set") | |
937 | ||
ea4bd995 PM |
938 | /* |
939 | * The gencursor defines two generations, the currently active and the | |
940 | * next one. Objects contain a bitmask of 2 bits specifying the generations | |
941 | * they're active in. A set bit means they're inactive in the generation | |
942 | * represented by that bit. | |
943 | * | |
944 | * New objects start out as inactive in the current and active in the | |
945 | * next generation. When committing the ruleset the bitmask is cleared, | |
946 | * meaning they're active in all generations. When removing an object, | |
947 | * it is set inactive in the next generation. After committing the ruleset, | |
948 | * the objects are removed. | |
949 | */ | |
950 | static inline unsigned int nft_gencursor_next(const struct net *net) | |
951 | { | |
952 | return net->nft.gencursor + 1 == 1 ? 1 : 0; | |
953 | } | |
954 | ||
955 | static inline u8 nft_genmask_next(const struct net *net) | |
956 | { | |
957 | return 1 << nft_gencursor_next(net); | |
958 | } | |
959 | ||
960 | static inline u8 nft_genmask_cur(const struct net *net) | |
961 | { | |
962 | /* Use ACCESS_ONCE() to prevent refetching the value for atomicity */ | |
963 | return 1 << ACCESS_ONCE(net->nft.gencursor); | |
964 | } | |
965 | ||
22fe54d5 PM |
966 | #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) |
967 | ||
cc02e457 PM |
968 | /* |
969 | * Set element transaction helpers | |
970 | */ | |
971 | ||
972 | static inline bool nft_set_elem_active(const struct nft_set_ext *ext, | |
973 | u8 genmask) | |
974 | { | |
975 | return !(ext->genmask & genmask); | |
976 | } | |
977 | ||
978 | static inline void nft_set_elem_change_active(const struct nft_set *set, | |
979 | struct nft_set_ext *ext) | |
980 | { | |
981 | ext->genmask ^= nft_genmask_next(read_pnet(&set->pnet)); | |
982 | } | |
983 | ||
69086658 PM |
984 | /* |
985 | * We use a free bit in the genmask field to indicate the element | |
986 | * is busy, meaning it is currently being processed either by | |
987 | * the netlink API or GC. | |
988 | * | |
989 | * Even though the genmask is only a single byte wide, this works | |
990 | * because the extension structure if fully constant once initialized, | |
991 | * so there are no non-atomic write accesses unless it is already | |
992 | * marked busy. | |
993 | */ | |
994 | #define NFT_SET_ELEM_BUSY_MASK (1 << 2) | |
995 | ||
996 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
997 | #define NFT_SET_ELEM_BUSY_BIT 2 | |
998 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
999 | #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) | |
1000 | #else | |
1001 | #error | |
1002 | #endif | |
1003 | ||
1004 | static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) | |
1005 | { | |
1006 | unsigned long *word = (unsigned long *)ext; | |
1007 | ||
1008 | BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); | |
1009 | return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1010 | } | |
1011 | ||
1012 | static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) | |
1013 | { | |
1014 | unsigned long *word = (unsigned long *)ext; | |
1015 | ||
1016 | clear_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1017 | } | |
1018 | ||
1a1e1a12 PM |
1019 | /** |
1020 | * struct nft_trans - nf_tables object update in transaction | |
1021 | * | |
1022 | * @list: used internally | |
1023 | * @msg_type: message type | |
1024 | * @ctx: transaction context | |
1025 | * @data: internal information related to the transaction | |
1026 | */ | |
1027 | struct nft_trans { | |
1028 | struct list_head list; | |
1029 | int msg_type; | |
1030 | struct nft_ctx ctx; | |
1031 | char data[0]; | |
1032 | }; | |
1033 | ||
1034 | struct nft_trans_rule { | |
1035 | struct nft_rule *rule; | |
1036 | }; | |
1037 | ||
1038 | #define nft_trans_rule(trans) \ | |
1039 | (((struct nft_trans_rule *)trans->data)->rule) | |
1040 | ||
1041 | struct nft_trans_set { | |
1042 | struct nft_set *set; | |
1043 | u32 set_id; | |
1044 | }; | |
1045 | ||
1046 | #define nft_trans_set(trans) \ | |
1047 | (((struct nft_trans_set *)trans->data)->set) | |
1048 | #define nft_trans_set_id(trans) \ | |
1049 | (((struct nft_trans_set *)trans->data)->set_id) | |
1050 | ||
1051 | struct nft_trans_chain { | |
1052 | bool update; | |
1053 | char name[NFT_CHAIN_MAXNAMELEN]; | |
1054 | struct nft_stats __percpu *stats; | |
1055 | u8 policy; | |
1056 | }; | |
1057 | ||
1058 | #define nft_trans_chain_update(trans) \ | |
1059 | (((struct nft_trans_chain *)trans->data)->update) | |
1060 | #define nft_trans_chain_name(trans) \ | |
1061 | (((struct nft_trans_chain *)trans->data)->name) | |
1062 | #define nft_trans_chain_stats(trans) \ | |
1063 | (((struct nft_trans_chain *)trans->data)->stats) | |
1064 | #define nft_trans_chain_policy(trans) \ | |
1065 | (((struct nft_trans_chain *)trans->data)->policy) | |
1066 | ||
1067 | struct nft_trans_table { | |
1068 | bool update; | |
1069 | bool enable; | |
1070 | }; | |
1071 | ||
1072 | #define nft_trans_table_update(trans) \ | |
1073 | (((struct nft_trans_table *)trans->data)->update) | |
1074 | #define nft_trans_table_enable(trans) \ | |
1075 | (((struct nft_trans_table *)trans->data)->enable) | |
1076 | ||
1077 | struct nft_trans_elem { | |
1078 | struct nft_set *set; | |
1079 | struct nft_set_elem elem; | |
1080 | }; | |
1081 | ||
1082 | #define nft_trans_elem_set(trans) \ | |
1083 | (((struct nft_trans_elem *)trans->data)->set) | |
1084 | #define nft_trans_elem(trans) \ | |
1085 | (((struct nft_trans_elem *)trans->data)->elem) | |
1086 | ||
96518518 | 1087 | #endif /* _NET_NF_TABLES_H */ |