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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; | |
beac5afa | 17 | bool tprot_set; |
4566bf27 | 18 | u8 tprot; |
0ca743a5 PNA |
19 | /* for x_tables compatibility */ |
20 | struct xt_action_param xt; | |
96518518 PM |
21 | }; |
22 | ||
0e5a1c7e PNA |
23 | static inline struct net *nft_net(const struct nft_pktinfo *pkt) |
24 | { | |
25 | return pkt->xt.state->net; | |
26 | } | |
27 | ||
28 | static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) | |
29 | { | |
30 | return pkt->xt.state->hook; | |
31 | } | |
32 | ||
33 | static inline u8 nft_pf(const struct nft_pktinfo *pkt) | |
34 | { | |
35 | return pkt->xt.state->pf; | |
36 | } | |
37 | ||
38 | static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) | |
39 | { | |
40 | return pkt->xt.state->in; | |
41 | } | |
42 | ||
43 | static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) | |
44 | { | |
45 | return pkt->xt.state->out; | |
46 | } | |
47 | ||
0ca743a5 | 48 | static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
0ca743a5 | 49 | struct sk_buff *skb, |
073bfd56 | 50 | const struct nf_hook_state *state) |
0ca743a5 PNA |
51 | { |
52 | pkt->skb = skb; | |
613dbd95 | 53 | pkt->xt.state = state; |
0ca743a5 PNA |
54 | } |
55 | ||
beac5afa PNA |
56 | static inline void nft_set_pktinfo_proto_unspec(struct nft_pktinfo *pkt, |
57 | struct sk_buff *skb) | |
58 | { | |
59 | pkt->tprot_set = false; | |
60 | pkt->tprot = 0; | |
61 | pkt->xt.thoff = 0; | |
62 | pkt->xt.fragoff = 0; | |
63 | } | |
64 | ||
65 | static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, | |
66 | struct sk_buff *skb, | |
67 | const struct nf_hook_state *state) | |
68 | { | |
69 | nft_set_pktinfo(pkt, skb, state); | |
70 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
71 | } | |
72 | ||
a55e22e9 PM |
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 | ||
96518518 PM |
84 | struct nft_data { |
85 | union { | |
1ca2e170 PM |
86 | u32 data[4]; |
87 | struct nft_verdict verdict; | |
96518518 PM |
88 | }; |
89 | } __attribute__((aligned(__alignof__(u64)))); | |
90 | ||
a55e22e9 PM |
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 { | |
49499c3e | 101 | u32 data[20]; |
a55e22e9 PM |
102 | struct nft_verdict verdict; |
103 | }; | |
104 | }; | |
105 | ||
49499c3e PM |
106 | static inline void nft_data_copy(u32 *dst, const struct nft_data *src, |
107 | unsigned int len) | |
96518518 | 108 | { |
49499c3e | 109 | memcpy(dst, src, len); |
96518518 PM |
110 | } |
111 | ||
112 | static inline void nft_data_debug(const struct nft_data *data) | |
113 | { | |
114 | pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", | |
115 | data->data[0], data->data[1], | |
116 | data->data[2], data->data[3]); | |
117 | } | |
118 | ||
119 | /** | |
20a69341 | 120 | * struct nft_ctx - nf_tables rule/set context |
96518518 | 121 | * |
99633ab2 | 122 | * @net: net namespace |
96518518 PM |
123 | * @afi: address family info |
124 | * @table: the table the chain is contained in | |
125 | * @chain: the chain the rule is contained in | |
0ca743a5 | 126 | * @nla: netlink attributes |
128ad332 PNA |
127 | * @portid: netlink portID of the original message |
128 | * @seq: netlink sequence number | |
129 | * @report: notify via unicast netlink message | |
96518518 PM |
130 | */ |
131 | struct nft_ctx { | |
99633ab2 | 132 | struct net *net; |
7c95f6d8 PNA |
133 | struct nft_af_info *afi; |
134 | struct nft_table *table; | |
135 | struct nft_chain *chain; | |
0ca743a5 | 136 | const struct nlattr * const *nla; |
128ad332 PNA |
137 | u32 portid; |
138 | u32 seq; | |
139 | bool report; | |
96518518 PM |
140 | }; |
141 | ||
96518518 PM |
142 | struct nft_data_desc { |
143 | enum nft_data_types type; | |
144 | unsigned int len; | |
145 | }; | |
146 | ||
d0a11fc3 PM |
147 | int nft_data_init(const struct nft_ctx *ctx, |
148 | struct nft_data *data, unsigned int size, | |
5eccdfaa JP |
149 | struct nft_data_desc *desc, const struct nlattr *nla); |
150 | void nft_data_uninit(const struct nft_data *data, enum nft_data_types type); | |
151 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, | |
152 | enum nft_data_types type, unsigned int len); | |
96518518 PM |
153 | |
154 | static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) | |
155 | { | |
156 | return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; | |
157 | } | |
158 | ||
20a69341 PM |
159 | static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
160 | { | |
bf798657 | 161 | return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; |
20a69341 PM |
162 | } |
163 | ||
f1d505bb | 164 | int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); |
b1c96ed3 PM |
165 | unsigned int nft_parse_register(const struct nlattr *attr); |
166 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); | |
167 | ||
d07db988 | 168 | int nft_validate_register_load(enum nft_registers reg, unsigned int len); |
1ec10212 PM |
169 | int nft_validate_register_store(const struct nft_ctx *ctx, |
170 | enum nft_registers reg, | |
171 | const struct nft_data *data, | |
172 | enum nft_data_types type, unsigned int len); | |
96518518 | 173 | |
86f1ec32 PM |
174 | /** |
175 | * struct nft_userdata - user defined data associated with an object | |
176 | * | |
177 | * @len: length of the data | |
178 | * @data: content | |
179 | * | |
180 | * The presence of user data is indicated in an object specific fashion, | |
181 | * so a length of zero can't occur and the value "len" indicates data | |
182 | * of length len + 1. | |
183 | */ | |
184 | struct nft_userdata { | |
185 | u8 len; | |
186 | unsigned char data[0]; | |
187 | }; | |
188 | ||
20a69341 PM |
189 | /** |
190 | * struct nft_set_elem - generic representation of set elements | |
191 | * | |
20a69341 | 192 | * @key: element key |
fe2811eb | 193 | * @priv: element private data and extensions |
20a69341 PM |
194 | */ |
195 | struct nft_set_elem { | |
7d740264 PM |
196 | union { |
197 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
198 | struct nft_data val; | |
199 | } key; | |
fe2811eb | 200 | void *priv; |
20a69341 PM |
201 | }; |
202 | ||
203 | struct nft_set; | |
204 | struct nft_set_iter { | |
8588ac09 | 205 | u8 genmask; |
20a69341 PM |
206 | unsigned int count; |
207 | unsigned int skip; | |
208 | int err; | |
209 | int (*fn)(const struct nft_ctx *ctx, | |
210 | const struct nft_set *set, | |
211 | const struct nft_set_iter *iter, | |
212 | const struct nft_set_elem *elem); | |
213 | }; | |
214 | ||
c50b960c PM |
215 | /** |
216 | * struct nft_set_desc - description of set elements | |
217 | * | |
218 | * @klen: key length | |
219 | * @dlen: data length | |
220 | * @size: number of set elements | |
221 | */ | |
222 | struct nft_set_desc { | |
223 | unsigned int klen; | |
224 | unsigned int dlen; | |
225 | unsigned int size; | |
226 | }; | |
227 | ||
228 | /** | |
229 | * enum nft_set_class - performance class | |
230 | * | |
231 | * @NFT_LOOKUP_O_1: constant, O(1) | |
232 | * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) | |
233 | * @NFT_LOOKUP_O_N: linear, O(N) | |
234 | */ | |
235 | enum nft_set_class { | |
236 | NFT_SET_CLASS_O_1, | |
237 | NFT_SET_CLASS_O_LOG_N, | |
238 | NFT_SET_CLASS_O_N, | |
239 | }; | |
240 | ||
241 | /** | |
242 | * struct nft_set_estimate - estimation of memory and performance | |
243 | * characteristics | |
244 | * | |
245 | * @size: required memory | |
246 | * @class: lookup performance class | |
247 | */ | |
248 | struct nft_set_estimate { | |
249 | unsigned int size; | |
250 | enum nft_set_class class; | |
251 | }; | |
252 | ||
b2832dd6 | 253 | struct nft_set_ext; |
22fe54d5 | 254 | struct nft_expr; |
b2832dd6 | 255 | |
20a69341 PM |
256 | /** |
257 | * struct nft_set_ops - nf_tables set operations | |
258 | * | |
259 | * @lookup: look up an element within the set | |
260 | * @insert: insert new element into set | |
cc02e457 PM |
261 | * @activate: activate new element in the next generation |
262 | * @deactivate: deactivate element in the next generation | |
20a69341 PM |
263 | * @remove: remove element from set |
264 | * @walk: iterate over all set elemeennts | |
265 | * @privsize: function to return size of set private data | |
266 | * @init: initialize private data of new set instance | |
267 | * @destroy: destroy private data of set instance | |
268 | * @list: nf_tables_set_ops list node | |
269 | * @owner: module reference | |
fe2811eb | 270 | * @elemsize: element private size |
20a69341 PM |
271 | * @features: features supported by the implementation |
272 | */ | |
273 | struct nft_set_ops { | |
42a55769 PNA |
274 | bool (*lookup)(const struct net *net, |
275 | const struct nft_set *set, | |
8cd8937a | 276 | const u32 *key, |
b2832dd6 | 277 | const struct nft_set_ext **ext); |
22fe54d5 | 278 | bool (*update)(struct nft_set *set, |
8cd8937a | 279 | const u32 *key, |
22fe54d5 PM |
280 | void *(*new)(struct nft_set *, |
281 | const struct nft_expr *, | |
a55e22e9 | 282 | struct nft_regs *), |
22fe54d5 | 283 | const struct nft_expr *expr, |
a55e22e9 | 284 | struct nft_regs *regs, |
22fe54d5 PM |
285 | const struct nft_set_ext **ext); |
286 | ||
42a55769 PNA |
287 | int (*insert)(const struct net *net, |
288 | const struct nft_set *set, | |
c016c7e4 PNA |
289 | const struct nft_set_elem *elem, |
290 | struct nft_set_ext **ext); | |
42a55769 PNA |
291 | void (*activate)(const struct net *net, |
292 | const struct nft_set *set, | |
cc02e457 | 293 | const struct nft_set_elem *elem); |
42a55769 PNA |
294 | void * (*deactivate)(const struct net *net, |
295 | const struct nft_set *set, | |
cc02e457 | 296 | const struct nft_set_elem *elem); |
20a69341 PM |
297 | void (*remove)(const struct nft_set *set, |
298 | const struct nft_set_elem *elem); | |
299 | void (*walk)(const struct nft_ctx *ctx, | |
300 | const struct nft_set *set, | |
301 | struct nft_set_iter *iter); | |
302 | ||
303 | unsigned int (*privsize)(const struct nlattr * const nla[]); | |
c50b960c PM |
304 | bool (*estimate)(const struct nft_set_desc *desc, |
305 | u32 features, | |
306 | struct nft_set_estimate *est); | |
20a69341 | 307 | int (*init)(const struct nft_set *set, |
c50b960c | 308 | const struct nft_set_desc *desc, |
20a69341 PM |
309 | const struct nlattr * const nla[]); |
310 | void (*destroy)(const struct nft_set *set); | |
311 | ||
312 | struct list_head list; | |
313 | struct module *owner; | |
fe2811eb | 314 | unsigned int elemsize; |
20a69341 PM |
315 | u32 features; |
316 | }; | |
317 | ||
5eccdfaa JP |
318 | int nft_register_set(struct nft_set_ops *ops); |
319 | void nft_unregister_set(struct nft_set_ops *ops); | |
20a69341 PM |
320 | |
321 | /** | |
322 | * struct nft_set - nf_tables set instance | |
323 | * | |
324 | * @list: table set list node | |
325 | * @bindings: list of set bindings | |
326 | * @name: name of the set | |
327 | * @ktype: key type (numeric type defined by userspace, not used in the kernel) | |
328 | * @dtype: data type (verdict or numeric type defined by userspace) | |
c50b960c PM |
329 | * @size: maximum set size |
330 | * @nelems: number of elements | |
3dd0673a | 331 | * @ndeact: number of deactivated elements queued for removal |
d3e2a111 | 332 | * @timeout: default timeout value in jiffies |
761da293 | 333 | * @gc_int: garbage collection interval in msecs |
9363dc4b | 334 | * @policy: set parameterization (see enum nft_set_policies) |
e6d8ecac CFG |
335 | * @udlen: user data length |
336 | * @udata: user data | |
20a69341 PM |
337 | * @ops: set ops |
338 | * @flags: set flags | |
37a9cc52 | 339 | * @genmask: generation mask |
20a69341 PM |
340 | * @klen: key length |
341 | * @dlen: data length | |
342 | * @data: private set data | |
343 | */ | |
344 | struct nft_set { | |
345 | struct list_head list; | |
346 | struct list_head bindings; | |
cb39ad8b | 347 | char name[NFT_SET_MAXNAMELEN]; |
20a69341 PM |
348 | u32 ktype; |
349 | u32 dtype; | |
c50b960c | 350 | u32 size; |
3dd0673a PM |
351 | atomic_t nelems; |
352 | u32 ndeact; | |
761da293 PM |
353 | u64 timeout; |
354 | u32 gc_int; | |
9363dc4b | 355 | u16 policy; |
e6d8ecac CFG |
356 | u16 udlen; |
357 | unsigned char *udata; | |
20a69341 PM |
358 | /* runtime data below here */ |
359 | const struct nft_set_ops *ops ____cacheline_aligned; | |
37a9cc52 PNA |
360 | u16 flags:14, |
361 | genmask:2; | |
20a69341 PM |
362 | u8 klen; |
363 | u8 dlen; | |
364 | unsigned char data[] | |
365 | __attribute__((aligned(__alignof__(u64)))); | |
366 | }; | |
367 | ||
368 | static inline void *nft_set_priv(const struct nft_set *set) | |
369 | { | |
370 | return (void *)set->data; | |
371 | } | |
372 | ||
9d098292 PM |
373 | static inline struct nft_set *nft_set_container_of(const void *priv) |
374 | { | |
375 | return (void *)priv - offsetof(struct nft_set, data); | |
376 | } | |
377 | ||
5eccdfaa | 378 | struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
37a9cc52 | 379 | const struct nlattr *nla, u8 genmask); |
958bee14 | 380 | struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
37a9cc52 | 381 | const struct nlattr *nla, u8 genmask); |
20a69341 | 382 | |
761da293 PM |
383 | static inline unsigned long nft_set_gc_interval(const struct nft_set *set) |
384 | { | |
385 | return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; | |
386 | } | |
387 | ||
20a69341 PM |
388 | /** |
389 | * struct nft_set_binding - nf_tables set binding | |
390 | * | |
391 | * @list: set bindings list node | |
392 | * @chain: chain containing the rule bound to the set | |
11113e19 | 393 | * @flags: set action flags |
20a69341 PM |
394 | * |
395 | * A set binding contains all information necessary for validation | |
396 | * of new elements added to a bound set. | |
397 | */ | |
398 | struct nft_set_binding { | |
399 | struct list_head list; | |
400 | const struct nft_chain *chain; | |
11113e19 | 401 | u32 flags; |
20a69341 PM |
402 | }; |
403 | ||
5eccdfaa JP |
404 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
405 | struct nft_set_binding *binding); | |
406 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, | |
407 | struct nft_set_binding *binding); | |
20a69341 | 408 | |
3ac4c07a PM |
409 | /** |
410 | * enum nft_set_extensions - set extension type IDs | |
411 | * | |
412 | * @NFT_SET_EXT_KEY: element key | |
413 | * @NFT_SET_EXT_DATA: mapping data | |
414 | * @NFT_SET_EXT_FLAGS: element flags | |
c3e1b005 PM |
415 | * @NFT_SET_EXT_TIMEOUT: element timeout |
416 | * @NFT_SET_EXT_EXPIRATION: element expiration time | |
68e942e8 | 417 | * @NFT_SET_EXT_USERDATA: user data associated with the element |
f25ad2e9 | 418 | * @NFT_SET_EXT_EXPR: expression assiociated with the element |
3ac4c07a PM |
419 | * @NFT_SET_EXT_NUM: number of extension types |
420 | */ | |
421 | enum nft_set_extensions { | |
422 | NFT_SET_EXT_KEY, | |
423 | NFT_SET_EXT_DATA, | |
424 | NFT_SET_EXT_FLAGS, | |
c3e1b005 PM |
425 | NFT_SET_EXT_TIMEOUT, |
426 | NFT_SET_EXT_EXPIRATION, | |
68e942e8 | 427 | NFT_SET_EXT_USERDATA, |
f25ad2e9 | 428 | NFT_SET_EXT_EXPR, |
3ac4c07a PM |
429 | NFT_SET_EXT_NUM |
430 | }; | |
431 | ||
432 | /** | |
433 | * struct nft_set_ext_type - set extension type | |
434 | * | |
435 | * @len: fixed part length of the extension | |
436 | * @align: alignment requirements of the extension | |
437 | */ | |
438 | struct nft_set_ext_type { | |
439 | u8 len; | |
440 | u8 align; | |
441 | }; | |
442 | ||
443 | extern const struct nft_set_ext_type nft_set_ext_types[]; | |
444 | ||
445 | /** | |
446 | * struct nft_set_ext_tmpl - set extension template | |
447 | * | |
448 | * @len: length of extension area | |
449 | * @offset: offsets of individual extension types | |
450 | */ | |
451 | struct nft_set_ext_tmpl { | |
452 | u16 len; | |
453 | u8 offset[NFT_SET_EXT_NUM]; | |
454 | }; | |
455 | ||
456 | /** | |
457 | * struct nft_set_ext - set extensions | |
458 | * | |
cc02e457 | 459 | * @genmask: generation mask |
3ac4c07a PM |
460 | * @offset: offsets of individual extension types |
461 | * @data: beginning of extension data | |
462 | */ | |
463 | struct nft_set_ext { | |
cc02e457 | 464 | u8 genmask; |
3ac4c07a PM |
465 | u8 offset[NFT_SET_EXT_NUM]; |
466 | char data[0]; | |
467 | }; | |
468 | ||
469 | static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) | |
470 | { | |
471 | memset(tmpl, 0, sizeof(*tmpl)); | |
472 | tmpl->len = sizeof(struct nft_set_ext); | |
473 | } | |
474 | ||
475 | static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, | |
476 | unsigned int len) | |
477 | { | |
478 | tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); | |
479 | BUG_ON(tmpl->len > U8_MAX); | |
480 | tmpl->offset[id] = tmpl->len; | |
481 | tmpl->len += nft_set_ext_types[id].len + len; | |
482 | } | |
483 | ||
484 | static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) | |
485 | { | |
486 | nft_set_ext_add_length(tmpl, id, 0); | |
487 | } | |
488 | ||
489 | static inline void nft_set_ext_init(struct nft_set_ext *ext, | |
490 | const struct nft_set_ext_tmpl *tmpl) | |
491 | { | |
492 | memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); | |
493 | } | |
494 | ||
495 | static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
496 | { | |
497 | return !!ext->offset[id]; | |
498 | } | |
499 | ||
500 | static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
501 | { | |
502 | return ext && __nft_set_ext_exists(ext, id); | |
503 | } | |
504 | ||
505 | static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) | |
506 | { | |
507 | return (void *)ext + ext->offset[id]; | |
508 | } | |
509 | ||
510 | static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) | |
511 | { | |
512 | return nft_set_ext(ext, NFT_SET_EXT_KEY); | |
513 | } | |
514 | ||
515 | static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) | |
516 | { | |
517 | return nft_set_ext(ext, NFT_SET_EXT_DATA); | |
518 | } | |
519 | ||
520 | static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) | |
521 | { | |
522 | return nft_set_ext(ext, NFT_SET_EXT_FLAGS); | |
523 | } | |
ef1f7df9 | 524 | |
c3e1b005 PM |
525 | static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) |
526 | { | |
527 | return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); | |
528 | } | |
529 | ||
530 | static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) | |
531 | { | |
532 | return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); | |
533 | } | |
534 | ||
68e942e8 PM |
535 | static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) |
536 | { | |
537 | return nft_set_ext(ext, NFT_SET_EXT_USERDATA); | |
538 | } | |
539 | ||
f25ad2e9 PM |
540 | static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) |
541 | { | |
542 | return nft_set_ext(ext, NFT_SET_EXT_EXPR); | |
543 | } | |
544 | ||
c3e1b005 PM |
545 | static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) |
546 | { | |
547 | return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && | |
548 | time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); | |
549 | } | |
550 | ||
fe2811eb PM |
551 | static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, |
552 | void *elem) | |
553 | { | |
554 | return elem + set->ops->elemsize; | |
555 | } | |
556 | ||
22fe54d5 PM |
557 | void *nft_set_elem_init(const struct nft_set *set, |
558 | const struct nft_set_ext_tmpl *tmpl, | |
49499c3e | 559 | const u32 *key, const u32 *data, |
22fe54d5 | 560 | u64 timeout, gfp_t gfp); |
61f9e292 LZ |
561 | void nft_set_elem_destroy(const struct nft_set *set, void *elem, |
562 | bool destroy_expr); | |
61edafbb | 563 | |
cfed7e1b PM |
564 | /** |
565 | * struct nft_set_gc_batch_head - nf_tables set garbage collection batch | |
566 | * | |
567 | * @rcu: rcu head | |
568 | * @set: set the elements belong to | |
569 | * @cnt: count of elements | |
570 | */ | |
571 | struct nft_set_gc_batch_head { | |
572 | struct rcu_head rcu; | |
573 | const struct nft_set *set; | |
574 | unsigned int cnt; | |
575 | }; | |
576 | ||
577 | #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ | |
578 | sizeof(struct nft_set_gc_batch_head)) / \ | |
579 | sizeof(void *)) | |
580 | ||
581 | /** | |
582 | * struct nft_set_gc_batch - nf_tables set garbage collection batch | |
583 | * | |
584 | * @head: GC batch head | |
585 | * @elems: garbage collection elements | |
586 | */ | |
587 | struct nft_set_gc_batch { | |
588 | struct nft_set_gc_batch_head head; | |
589 | void *elems[NFT_SET_GC_BATCH_SIZE]; | |
590 | }; | |
591 | ||
592 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, | |
593 | gfp_t gfp); | |
594 | void nft_set_gc_batch_release(struct rcu_head *rcu); | |
595 | ||
596 | static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) | |
597 | { | |
598 | if (gcb != NULL) | |
599 | call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); | |
600 | } | |
601 | ||
602 | static inline struct nft_set_gc_batch * | |
603 | nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, | |
604 | gfp_t gfp) | |
605 | { | |
606 | if (gcb != NULL) { | |
607 | if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) | |
608 | return gcb; | |
609 | nft_set_gc_batch_complete(gcb); | |
610 | } | |
611 | return nft_set_gc_batch_alloc(set, gfp); | |
612 | } | |
613 | ||
614 | static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, | |
615 | void *elem) | |
616 | { | |
617 | gcb->elems[gcb->head.cnt++] = elem; | |
618 | } | |
619 | ||
96518518 | 620 | /** |
ef1f7df9 | 621 | * struct nft_expr_type - nf_tables expression type |
96518518 | 622 | * |
ef1f7df9 PM |
623 | * @select_ops: function to select nft_expr_ops |
624 | * @ops: default ops, used when no select_ops functions is present | |
96518518 PM |
625 | * @list: used internally |
626 | * @name: Identifier | |
627 | * @owner: module reference | |
628 | * @policy: netlink attribute policy | |
629 | * @maxattr: highest netlink attribute number | |
64d46806 | 630 | * @family: address family for AF-specific types |
151d799a | 631 | * @flags: expression type flags |
ef1f7df9 PM |
632 | */ |
633 | struct nft_expr_type { | |
0ca743a5 PNA |
634 | const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
635 | const struct nlattr * const tb[]); | |
ef1f7df9 PM |
636 | const struct nft_expr_ops *ops; |
637 | struct list_head list; | |
638 | const char *name; | |
639 | struct module *owner; | |
640 | const struct nla_policy *policy; | |
641 | unsigned int maxattr; | |
64d46806 | 642 | u8 family; |
151d799a | 643 | u8 flags; |
ef1f7df9 PM |
644 | }; |
645 | ||
151d799a PM |
646 | #define NFT_EXPR_STATEFUL 0x1 |
647 | ||
ef1f7df9 PM |
648 | /** |
649 | * struct nft_expr_ops - nf_tables expression operations | |
650 | * | |
651 | * @eval: Expression evaluation function | |
96518518 | 652 | * @size: full expression size, including private data size |
ef1f7df9 PM |
653 | * @init: initialization function |
654 | * @destroy: destruction function | |
655 | * @dump: function to dump parameters | |
656 | * @type: expression type | |
0ca743a5 PNA |
657 | * @validate: validate expression, called during loop detection |
658 | * @data: extra data to attach to this expression operation | |
96518518 PM |
659 | */ |
660 | struct nft_expr; | |
661 | struct nft_expr_ops { | |
662 | void (*eval)(const struct nft_expr *expr, | |
a55e22e9 | 663 | struct nft_regs *regs, |
96518518 | 664 | const struct nft_pktinfo *pkt); |
086f3321 PNA |
665 | int (*clone)(struct nft_expr *dst, |
666 | const struct nft_expr *src); | |
ef1f7df9 PM |
667 | unsigned int size; |
668 | ||
96518518 PM |
669 | int (*init)(const struct nft_ctx *ctx, |
670 | const struct nft_expr *expr, | |
671 | const struct nlattr * const tb[]); | |
62472bce PM |
672 | void (*destroy)(const struct nft_ctx *ctx, |
673 | const struct nft_expr *expr); | |
96518518 PM |
674 | int (*dump)(struct sk_buff *skb, |
675 | const struct nft_expr *expr); | |
0ca743a5 PNA |
676 | int (*validate)(const struct nft_ctx *ctx, |
677 | const struct nft_expr *expr, | |
678 | const struct nft_data **data); | |
ef1f7df9 | 679 | const struct nft_expr_type *type; |
0ca743a5 | 680 | void *data; |
96518518 PM |
681 | }; |
682 | ||
ef1f7df9 | 683 | #define NFT_EXPR_MAXATTR 16 |
96518518 PM |
684 | #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ |
685 | ALIGN(size, __alignof__(struct nft_expr))) | |
686 | ||
687 | /** | |
688 | * struct nft_expr - nf_tables expression | |
689 | * | |
690 | * @ops: expression ops | |
691 | * @data: expression private data | |
692 | */ | |
693 | struct nft_expr { | |
694 | const struct nft_expr_ops *ops; | |
695 | unsigned char data[]; | |
696 | }; | |
697 | ||
698 | static inline void *nft_expr_priv(const struct nft_expr *expr) | |
699 | { | |
700 | return (void *)expr->data; | |
701 | } | |
702 | ||
0b2d8a7b PM |
703 | struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, |
704 | const struct nlattr *nla); | |
705 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); | |
706 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, | |
707 | const struct nft_expr *expr); | |
708 | ||
086f3321 | 709 | static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) |
0b2d8a7b | 710 | { |
086f3321 PNA |
711 | int err; |
712 | ||
086f3321 PNA |
713 | if (src->ops->clone) { |
714 | dst->ops = src->ops; | |
715 | err = src->ops->clone(dst, src); | |
716 | if (err < 0) | |
717 | return err; | |
718 | } else { | |
719 | memcpy(dst, src, src->ops->size); | |
720 | } | |
61f9e292 LZ |
721 | |
722 | __module_get(src->ops->type->owner); | |
086f3321 | 723 | return 0; |
0b2d8a7b PM |
724 | } |
725 | ||
96518518 PM |
726 | /** |
727 | * struct nft_rule - nf_tables rule | |
728 | * | |
729 | * @list: used internally | |
96518518 | 730 | * @handle: rule handle |
0628b123 | 731 | * @genmask: generation mask |
96518518 | 732 | * @dlen: length of expression data |
86f1ec32 | 733 | * @udata: user data is appended to the rule |
96518518 PM |
734 | * @data: expression data |
735 | */ | |
736 | struct nft_rule { | |
737 | struct list_head list; | |
0768b3b3 | 738 | u64 handle:42, |
0628b123 | 739 | genmask:2, |
0768b3b3 | 740 | dlen:12, |
86f1ec32 | 741 | udata:1; |
96518518 PM |
742 | unsigned char data[] |
743 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
744 | }; | |
745 | ||
746 | static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) | |
747 | { | |
748 | return (struct nft_expr *)&rule->data[0]; | |
749 | } | |
750 | ||
751 | static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) | |
752 | { | |
753 | return ((void *)expr) + expr->ops->size; | |
754 | } | |
755 | ||
756 | static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) | |
757 | { | |
758 | return (struct nft_expr *)&rule->data[rule->dlen]; | |
759 | } | |
760 | ||
86f1ec32 | 761 | static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
0768b3b3 PNA |
762 | { |
763 | return (void *)&rule->data[rule->dlen]; | |
764 | } | |
765 | ||
96518518 PM |
766 | /* |
767 | * The last pointer isn't really necessary, but the compiler isn't able to | |
768 | * determine that the result of nft_expr_last() is always the same since it | |
769 | * can't assume that the dlen value wasn't changed within calls in the loop. | |
770 | */ | |
771 | #define nft_rule_for_each_expr(expr, last, rule) \ | |
772 | for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ | |
773 | (expr) != (last); \ | |
774 | (expr) = nft_expr_next(expr)) | |
775 | ||
776 | enum nft_chain_flags { | |
777 | NFT_BASE_CHAIN = 0x1, | |
96518518 PM |
778 | }; |
779 | ||
780 | /** | |
781 | * struct nft_chain - nf_tables chain | |
782 | * | |
783 | * @rules: list of rules in the chain | |
784 | * @list: used internally | |
b5bc89bf | 785 | * @table: table that this chain belongs to |
96518518 | 786 | * @handle: chain handle |
96518518 PM |
787 | * @use: number of jump references to this chain |
788 | * @level: length of longest path to this chain | |
a0a7379e | 789 | * @flags: bitmask of enum nft_chain_flags |
96518518 PM |
790 | * @name: name of the chain |
791 | */ | |
792 | struct nft_chain { | |
793 | struct list_head rules; | |
794 | struct list_head list; | |
b5bc89bf | 795 | struct nft_table *table; |
96518518 | 796 | u64 handle; |
a0a7379e | 797 | u32 use; |
96518518 | 798 | u16 level; |
664b0f8c PNA |
799 | u8 flags:6, |
800 | genmask:2; | |
96518518 PM |
801 | char name[NFT_CHAIN_MAXNAMELEN]; |
802 | }; | |
803 | ||
9370761c PNA |
804 | enum nft_chain_type { |
805 | NFT_CHAIN_T_DEFAULT = 0, | |
806 | NFT_CHAIN_T_ROUTE, | |
807 | NFT_CHAIN_T_NAT, | |
808 | NFT_CHAIN_T_MAX | |
809 | }; | |
810 | ||
1a1e1a12 PM |
811 | /** |
812 | * struct nf_chain_type - nf_tables chain type info | |
813 | * | |
814 | * @name: name of the type | |
815 | * @type: numeric identifier | |
816 | * @family: address family | |
817 | * @owner: module owner | |
818 | * @hook_mask: mask of valid hooks | |
819 | * @hooks: hookfn overrides | |
820 | */ | |
821 | struct nf_chain_type { | |
822 | const char *name; | |
823 | enum nft_chain_type type; | |
824 | int family; | |
825 | struct module *owner; | |
826 | unsigned int hook_mask; | |
827 | nf_hookfn *hooks[NF_MAX_HOOKS]; | |
828 | }; | |
829 | ||
7210e4e3 PNA |
830 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
831 | enum nft_chain_type type); | |
75e8d06d PNA |
832 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
833 | unsigned int hook_flags); | |
7210e4e3 | 834 | |
0ca743a5 | 835 | struct nft_stats { |
ce355e20 ED |
836 | u64 bytes; |
837 | u64 pkts; | |
838 | struct u64_stats_sync syncp; | |
0ca743a5 PNA |
839 | }; |
840 | ||
115a60b1 PM |
841 | #define NFT_HOOK_OPS_MAX 2 |
842 | ||
96518518 PM |
843 | /** |
844 | * struct nft_base_chain - nf_tables base chain | |
845 | * | |
846 | * @ops: netfilter hook ops | |
9370761c | 847 | * @type: chain type |
0ca743a5 PNA |
848 | * @policy: default policy |
849 | * @stats: per-cpu chain stats | |
96518518 | 850 | * @chain: the chain |
2cbce139 | 851 | * @dev_name: device name that this base chain is attached to (if any) |
96518518 PM |
852 | */ |
853 | struct nft_base_chain { | |
115a60b1 | 854 | struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; |
2a37d755 | 855 | const struct nf_chain_type *type; |
0ca743a5 | 856 | u8 policy; |
835b8033 | 857 | u8 flags; |
0ca743a5 | 858 | struct nft_stats __percpu *stats; |
96518518 | 859 | struct nft_chain chain; |
2cbce139 | 860 | char dev_name[IFNAMSIZ]; |
96518518 PM |
861 | }; |
862 | ||
863 | static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) | |
864 | { | |
865 | return container_of(chain, struct nft_base_chain, chain); | |
866 | } | |
867 | ||
5ebe0b0e | 868 | int __nft_release_basechain(struct nft_ctx *ctx); |
835b8033 | 869 | |
06198b34 | 870 | unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); |
96518518 | 871 | |
96518518 PM |
872 | /** |
873 | * struct nft_table - nf_tables table | |
874 | * | |
875 | * @list: used internally | |
876 | * @chains: chains in the table | |
877 | * @sets: sets in the table | |
878 | * @hgenerator: handle generator state | |
879 | * @use: number of chain references to this table | |
880 | * @flags: table flag (see enum nft_table_flags) | |
f2a6d766 | 881 | * @genmask: generation mask |
96518518 PM |
882 | * @name: name of the table |
883 | */ | |
884 | struct nft_table { | |
885 | struct list_head list; | |
886 | struct list_head chains; | |
887 | struct list_head sets; | |
888 | u64 hgenerator; | |
889 | u32 use; | |
f2a6d766 PNA |
890 | u16 flags:14, |
891 | genmask:2; | |
1cae565e | 892 | char name[NFT_TABLE_MAXNAMELEN]; |
ebddf1a8 PNA |
893 | }; |
894 | ||
895 | enum nft_af_flags { | |
896 | NFT_AF_NEEDS_DEV = (1 << 0), | |
96518518 PM |
897 | }; |
898 | ||
899 | /** | |
900 | * struct nft_af_info - nf_tables address family info | |
901 | * | |
902 | * @list: used internally | |
903 | * @family: address family | |
904 | * @nhooks: number of hooks in this family | |
905 | * @owner: module owner | |
906 | * @tables: used internally | |
ebddf1a8 | 907 | * @flags: family flags |
115a60b1 PM |
908 | * @nops: number of hook ops in this family |
909 | * @hook_ops_init: initialization function for chain hook ops | |
96518518 PM |
910 | * @hooks: hookfn overrides for packet validation |
911 | */ | |
912 | struct nft_af_info { | |
913 | struct list_head list; | |
914 | int family; | |
915 | unsigned int nhooks; | |
916 | struct module *owner; | |
917 | struct list_head tables; | |
ebddf1a8 | 918 | u32 flags; |
115a60b1 PM |
919 | unsigned int nops; |
920 | void (*hook_ops_init)(struct nf_hook_ops *, | |
921 | unsigned int); | |
96518518 PM |
922 | nf_hookfn *hooks[NF_MAX_HOOKS]; |
923 | }; | |
924 | ||
5eccdfaa | 925 | int nft_register_afinfo(struct net *, struct nft_af_info *); |
df05ef87 | 926 | void nft_unregister_afinfo(struct net *, struct nft_af_info *); |
96518518 | 927 | |
2a37d755 PM |
928 | int nft_register_chain_type(const struct nf_chain_type *); |
929 | void nft_unregister_chain_type(const struct nf_chain_type *); | |
96518518 | 930 | |
5eccdfaa JP |
931 | int nft_register_expr(struct nft_expr_type *); |
932 | void nft_unregister_expr(struct nft_expr_type *); | |
96518518 | 933 | |
33d5a7b1 FW |
934 | int nft_verdict_dump(struct sk_buff *skb, int type, |
935 | const struct nft_verdict *v); | |
936 | ||
937 | /** | |
938 | * struct nft_traceinfo - nft tracing information and state | |
939 | * | |
940 | * @pkt: pktinfo currently processed | |
941 | * @basechain: base chain currently processed | |
942 | * @chain: chain currently processed | |
943 | * @rule: rule that was evaluated | |
944 | * @verdict: verdict given by rule | |
945 | * @type: event type (enum nft_trace_types) | |
946 | * @packet_dumped: packet headers sent in a previous traceinfo message | |
947 | * @trace: other struct members are initialised | |
948 | */ | |
949 | struct nft_traceinfo { | |
950 | const struct nft_pktinfo *pkt; | |
951 | const struct nft_base_chain *basechain; | |
952 | const struct nft_chain *chain; | |
953 | const struct nft_rule *rule; | |
954 | const struct nft_verdict *verdict; | |
955 | enum nft_trace_types type; | |
956 | bool packet_dumped; | |
957 | bool trace; | |
958 | }; | |
959 | ||
960 | void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, | |
961 | const struct nft_verdict *verdict, | |
962 | const struct nft_chain *basechain); | |
963 | ||
964 | void nft_trace_notify(struct nft_traceinfo *info); | |
965 | ||
67a8fc27 PM |
966 | #define nft_dereference(p) \ |
967 | nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) | |
968 | ||
96518518 PM |
969 | #define MODULE_ALIAS_NFT_FAMILY(family) \ |
970 | MODULE_ALIAS("nft-afinfo-" __stringify(family)) | |
971 | ||
9370761c PNA |
972 | #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
973 | MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) | |
96518518 | 974 | |
64d46806 PM |
975 | #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
976 | MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) | |
977 | ||
96518518 PM |
978 | #define MODULE_ALIAS_NFT_EXPR(name) \ |
979 | MODULE_ALIAS("nft-expr-" name) | |
980 | ||
20a69341 PM |
981 | #define MODULE_ALIAS_NFT_SET() \ |
982 | MODULE_ALIAS("nft-set") | |
983 | ||
ea4bd995 PM |
984 | /* |
985 | * The gencursor defines two generations, the currently active and the | |
986 | * next one. Objects contain a bitmask of 2 bits specifying the generations | |
987 | * they're active in. A set bit means they're inactive in the generation | |
988 | * represented by that bit. | |
989 | * | |
990 | * New objects start out as inactive in the current and active in the | |
991 | * next generation. When committing the ruleset the bitmask is cleared, | |
992 | * meaning they're active in all generations. When removing an object, | |
993 | * it is set inactive in the next generation. After committing the ruleset, | |
994 | * the objects are removed. | |
995 | */ | |
996 | static inline unsigned int nft_gencursor_next(const struct net *net) | |
997 | { | |
998 | return net->nft.gencursor + 1 == 1 ? 1 : 0; | |
999 | } | |
1000 | ||
1001 | static inline u8 nft_genmask_next(const struct net *net) | |
1002 | { | |
1003 | return 1 << nft_gencursor_next(net); | |
1004 | } | |
1005 | ||
1006 | static inline u8 nft_genmask_cur(const struct net *net) | |
1007 | { | |
1008 | /* Use ACCESS_ONCE() to prevent refetching the value for atomicity */ | |
1009 | return 1 << ACCESS_ONCE(net->nft.gencursor); | |
1010 | } | |
1011 | ||
22fe54d5 PM |
1012 | #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) |
1013 | ||
889f7ee7 PNA |
1014 | /* |
1015 | * Generic transaction helpers | |
1016 | */ | |
1017 | ||
1018 | /* Check if this object is currently active. */ | |
1019 | #define nft_is_active(__net, __obj) \ | |
1020 | (((__obj)->genmask & nft_genmask_cur(__net)) == 0) | |
1021 | ||
1022 | /* Check if this object is active in the next generation. */ | |
1023 | #define nft_is_active_next(__net, __obj) \ | |
1024 | (((__obj)->genmask & nft_genmask_next(__net)) == 0) | |
1025 | ||
1026 | /* This object becomes active in the next generation. */ | |
1027 | #define nft_activate_next(__net, __obj) \ | |
1028 | (__obj)->genmask = nft_genmask_cur(__net) | |
1029 | ||
1030 | /* This object becomes inactive in the next generation. */ | |
1031 | #define nft_deactivate_next(__net, __obj) \ | |
1032 | (__obj)->genmask = nft_genmask_next(__net) | |
1033 | ||
1034 | /* After committing the ruleset, clear the stale generation bit. */ | |
1035 | #define nft_clear(__net, __obj) \ | |
1036 | (__obj)->genmask &= ~nft_genmask_next(__net) | |
f2a6d766 PNA |
1037 | #define nft_active_genmask(__obj, __genmask) \ |
1038 | !((__obj)->genmask & __genmask) | |
889f7ee7 | 1039 | |
cc02e457 PM |
1040 | /* |
1041 | * Set element transaction helpers | |
1042 | */ | |
1043 | ||
1044 | static inline bool nft_set_elem_active(const struct nft_set_ext *ext, | |
1045 | u8 genmask) | |
1046 | { | |
1047 | return !(ext->genmask & genmask); | |
1048 | } | |
1049 | ||
42a55769 PNA |
1050 | static inline void nft_set_elem_change_active(const struct net *net, |
1051 | const struct nft_set *set, | |
cc02e457 PM |
1052 | struct nft_set_ext *ext) |
1053 | { | |
42a55769 | 1054 | ext->genmask ^= nft_genmask_next(net); |
cc02e457 PM |
1055 | } |
1056 | ||
69086658 PM |
1057 | /* |
1058 | * We use a free bit in the genmask field to indicate the element | |
1059 | * is busy, meaning it is currently being processed either by | |
1060 | * the netlink API or GC. | |
1061 | * | |
1062 | * Even though the genmask is only a single byte wide, this works | |
1063 | * because the extension structure if fully constant once initialized, | |
1064 | * so there are no non-atomic write accesses unless it is already | |
1065 | * marked busy. | |
1066 | */ | |
1067 | #define NFT_SET_ELEM_BUSY_MASK (1 << 2) | |
1068 | ||
1069 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
1070 | #define NFT_SET_ELEM_BUSY_BIT 2 | |
1071 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
1072 | #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) | |
1073 | #else | |
1074 | #error | |
1075 | #endif | |
1076 | ||
1077 | static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) | |
1078 | { | |
1079 | unsigned long *word = (unsigned long *)ext; | |
1080 | ||
1081 | BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); | |
1082 | return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1083 | } | |
1084 | ||
1085 | static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) | |
1086 | { | |
1087 | unsigned long *word = (unsigned long *)ext; | |
1088 | ||
1089 | clear_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1090 | } | |
1091 | ||
1a1e1a12 PM |
1092 | /** |
1093 | * struct nft_trans - nf_tables object update in transaction | |
1094 | * | |
1095 | * @list: used internally | |
1096 | * @msg_type: message type | |
1097 | * @ctx: transaction context | |
1098 | * @data: internal information related to the transaction | |
1099 | */ | |
1100 | struct nft_trans { | |
1101 | struct list_head list; | |
1102 | int msg_type; | |
1103 | struct nft_ctx ctx; | |
1104 | char data[0]; | |
1105 | }; | |
1106 | ||
1107 | struct nft_trans_rule { | |
1108 | struct nft_rule *rule; | |
1109 | }; | |
1110 | ||
1111 | #define nft_trans_rule(trans) \ | |
1112 | (((struct nft_trans_rule *)trans->data)->rule) | |
1113 | ||
1114 | struct nft_trans_set { | |
1115 | struct nft_set *set; | |
1116 | u32 set_id; | |
1117 | }; | |
1118 | ||
1119 | #define nft_trans_set(trans) \ | |
1120 | (((struct nft_trans_set *)trans->data)->set) | |
1121 | #define nft_trans_set_id(trans) \ | |
1122 | (((struct nft_trans_set *)trans->data)->set_id) | |
1123 | ||
1124 | struct nft_trans_chain { | |
1125 | bool update; | |
1126 | char name[NFT_CHAIN_MAXNAMELEN]; | |
1127 | struct nft_stats __percpu *stats; | |
1128 | u8 policy; | |
1129 | }; | |
1130 | ||
1131 | #define nft_trans_chain_update(trans) \ | |
1132 | (((struct nft_trans_chain *)trans->data)->update) | |
1133 | #define nft_trans_chain_name(trans) \ | |
1134 | (((struct nft_trans_chain *)trans->data)->name) | |
1135 | #define nft_trans_chain_stats(trans) \ | |
1136 | (((struct nft_trans_chain *)trans->data)->stats) | |
1137 | #define nft_trans_chain_policy(trans) \ | |
1138 | (((struct nft_trans_chain *)trans->data)->policy) | |
1139 | ||
1140 | struct nft_trans_table { | |
1141 | bool update; | |
1142 | bool enable; | |
1143 | }; | |
1144 | ||
1145 | #define nft_trans_table_update(trans) \ | |
1146 | (((struct nft_trans_table *)trans->data)->update) | |
1147 | #define nft_trans_table_enable(trans) \ | |
1148 | (((struct nft_trans_table *)trans->data)->enable) | |
1149 | ||
1150 | struct nft_trans_elem { | |
1151 | struct nft_set *set; | |
1152 | struct nft_set_elem elem; | |
1153 | }; | |
1154 | ||
1155 | #define nft_trans_elem_set(trans) \ | |
1156 | (((struct nft_trans_elem *)trans->data)->set) | |
1157 | #define nft_trans_elem(trans) \ | |
1158 | (((struct nft_trans_elem *)trans->data)->elem) | |
1159 | ||
96518518 | 1160 | #endif /* _NET_NF_TABLES_H */ |