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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; | |
beac5afa | 22 | bool tprot_set; |
4566bf27 | 23 | u8 tprot; |
0ca743a5 PNA |
24 | /* for x_tables compatibility */ |
25 | struct xt_action_param xt; | |
96518518 PM |
26 | }; |
27 | ||
0ca743a5 | 28 | static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
0ca743a5 | 29 | struct sk_buff *skb, |
073bfd56 | 30 | const struct nf_hook_state *state) |
0ca743a5 PNA |
31 | { |
32 | pkt->skb = skb; | |
613dbd95 PNA |
33 | pkt->net = state->net; |
34 | pkt->in = state->in; | |
35 | pkt->out = state->out; | |
36 | pkt->hook = state->hook; | |
37 | pkt->pf = state->pf; | |
38 | pkt->xt.state = state; | |
0ca743a5 PNA |
39 | } |
40 | ||
beac5afa PNA |
41 | static inline void nft_set_pktinfo_proto_unspec(struct nft_pktinfo *pkt, |
42 | struct sk_buff *skb) | |
43 | { | |
44 | pkt->tprot_set = false; | |
45 | pkt->tprot = 0; | |
46 | pkt->xt.thoff = 0; | |
47 | pkt->xt.fragoff = 0; | |
48 | } | |
49 | ||
50 | static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, | |
51 | struct sk_buff *skb, | |
52 | const struct nf_hook_state *state) | |
53 | { | |
54 | nft_set_pktinfo(pkt, skb, state); | |
55 | nft_set_pktinfo_proto_unspec(pkt, skb); | |
56 | } | |
57 | ||
a55e22e9 PM |
58 | /** |
59 | * struct nft_verdict - nf_tables verdict | |
60 | * | |
61 | * @code: nf_tables/netfilter verdict code | |
62 | * @chain: destination chain for NFT_JUMP/NFT_GOTO | |
63 | */ | |
64 | struct nft_verdict { | |
65 | u32 code; | |
66 | struct nft_chain *chain; | |
67 | }; | |
68 | ||
96518518 PM |
69 | struct nft_data { |
70 | union { | |
1ca2e170 PM |
71 | u32 data[4]; |
72 | struct nft_verdict verdict; | |
96518518 PM |
73 | }; |
74 | } __attribute__((aligned(__alignof__(u64)))); | |
75 | ||
a55e22e9 PM |
76 | /** |
77 | * struct nft_regs - nf_tables register set | |
78 | * | |
79 | * @data: data registers | |
80 | * @verdict: verdict register | |
81 | * | |
82 | * The first four data registers alias to the verdict register. | |
83 | */ | |
84 | struct nft_regs { | |
85 | union { | |
49499c3e | 86 | u32 data[20]; |
a55e22e9 PM |
87 | struct nft_verdict verdict; |
88 | }; | |
89 | }; | |
90 | ||
49499c3e PM |
91 | static inline void nft_data_copy(u32 *dst, const struct nft_data *src, |
92 | unsigned int len) | |
96518518 | 93 | { |
49499c3e | 94 | memcpy(dst, src, len); |
96518518 PM |
95 | } |
96 | ||
97 | static inline void nft_data_debug(const struct nft_data *data) | |
98 | { | |
99 | pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", | |
100 | data->data[0], data->data[1], | |
101 | data->data[2], data->data[3]); | |
102 | } | |
103 | ||
104 | /** | |
20a69341 | 105 | * struct nft_ctx - nf_tables rule/set context |
96518518 | 106 | * |
99633ab2 | 107 | * @net: net namespace |
96518518 PM |
108 | * @afi: address family info |
109 | * @table: the table the chain is contained in | |
110 | * @chain: the chain the rule is contained in | |
0ca743a5 | 111 | * @nla: netlink attributes |
128ad332 PNA |
112 | * @portid: netlink portID of the original message |
113 | * @seq: netlink sequence number | |
114 | * @report: notify via unicast netlink message | |
96518518 PM |
115 | */ |
116 | struct nft_ctx { | |
99633ab2 | 117 | struct net *net; |
7c95f6d8 PNA |
118 | struct nft_af_info *afi; |
119 | struct nft_table *table; | |
120 | struct nft_chain *chain; | |
0ca743a5 | 121 | const struct nlattr * const *nla; |
128ad332 PNA |
122 | u32 portid; |
123 | u32 seq; | |
124 | bool report; | |
96518518 PM |
125 | }; |
126 | ||
96518518 PM |
127 | struct nft_data_desc { |
128 | enum nft_data_types type; | |
129 | unsigned int len; | |
130 | }; | |
131 | ||
d0a11fc3 PM |
132 | int nft_data_init(const struct nft_ctx *ctx, |
133 | struct nft_data *data, unsigned int size, | |
5eccdfaa JP |
134 | struct nft_data_desc *desc, const struct nlattr *nla); |
135 | void nft_data_uninit(const struct nft_data *data, enum nft_data_types type); | |
136 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, | |
137 | enum nft_data_types type, unsigned int len); | |
96518518 PM |
138 | |
139 | static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) | |
140 | { | |
141 | return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; | |
142 | } | |
143 | ||
20a69341 PM |
144 | static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
145 | { | |
bf798657 | 146 | return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; |
20a69341 PM |
147 | } |
148 | ||
36b701fa | 149 | unsigned int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); |
b1c96ed3 PM |
150 | unsigned int nft_parse_register(const struct nlattr *attr); |
151 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); | |
152 | ||
d07db988 | 153 | int nft_validate_register_load(enum nft_registers reg, unsigned int len); |
1ec10212 PM |
154 | int nft_validate_register_store(const struct nft_ctx *ctx, |
155 | enum nft_registers reg, | |
156 | const struct nft_data *data, | |
157 | enum nft_data_types type, unsigned int len); | |
96518518 | 158 | |
86f1ec32 PM |
159 | /** |
160 | * struct nft_userdata - user defined data associated with an object | |
161 | * | |
162 | * @len: length of the data | |
163 | * @data: content | |
164 | * | |
165 | * The presence of user data is indicated in an object specific fashion, | |
166 | * so a length of zero can't occur and the value "len" indicates data | |
167 | * of length len + 1. | |
168 | */ | |
169 | struct nft_userdata { | |
170 | u8 len; | |
171 | unsigned char data[0]; | |
172 | }; | |
173 | ||
20a69341 PM |
174 | /** |
175 | * struct nft_set_elem - generic representation of set elements | |
176 | * | |
20a69341 | 177 | * @key: element key |
fe2811eb | 178 | * @priv: element private data and extensions |
20a69341 PM |
179 | */ |
180 | struct nft_set_elem { | |
7d740264 PM |
181 | union { |
182 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
183 | struct nft_data val; | |
184 | } key; | |
fe2811eb | 185 | void *priv; |
20a69341 PM |
186 | }; |
187 | ||
188 | struct nft_set; | |
189 | struct nft_set_iter { | |
8588ac09 | 190 | u8 genmask; |
20a69341 PM |
191 | unsigned int count; |
192 | unsigned int skip; | |
193 | int err; | |
194 | int (*fn)(const struct nft_ctx *ctx, | |
195 | const struct nft_set *set, | |
196 | const struct nft_set_iter *iter, | |
197 | const struct nft_set_elem *elem); | |
198 | }; | |
199 | ||
c50b960c PM |
200 | /** |
201 | * struct nft_set_desc - description of set elements | |
202 | * | |
203 | * @klen: key length | |
204 | * @dlen: data length | |
205 | * @size: number of set elements | |
206 | */ | |
207 | struct nft_set_desc { | |
208 | unsigned int klen; | |
209 | unsigned int dlen; | |
210 | unsigned int size; | |
211 | }; | |
212 | ||
213 | /** | |
214 | * enum nft_set_class - performance class | |
215 | * | |
216 | * @NFT_LOOKUP_O_1: constant, O(1) | |
217 | * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) | |
218 | * @NFT_LOOKUP_O_N: linear, O(N) | |
219 | */ | |
220 | enum nft_set_class { | |
221 | NFT_SET_CLASS_O_1, | |
222 | NFT_SET_CLASS_O_LOG_N, | |
223 | NFT_SET_CLASS_O_N, | |
224 | }; | |
225 | ||
226 | /** | |
227 | * struct nft_set_estimate - estimation of memory and performance | |
228 | * characteristics | |
229 | * | |
230 | * @size: required memory | |
231 | * @class: lookup performance class | |
232 | */ | |
233 | struct nft_set_estimate { | |
234 | unsigned int size; | |
235 | enum nft_set_class class; | |
236 | }; | |
237 | ||
b2832dd6 | 238 | struct nft_set_ext; |
22fe54d5 | 239 | struct nft_expr; |
b2832dd6 | 240 | |
20a69341 PM |
241 | /** |
242 | * struct nft_set_ops - nf_tables set operations | |
243 | * | |
244 | * @lookup: look up an element within the set | |
245 | * @insert: insert new element into set | |
cc02e457 PM |
246 | * @activate: activate new element in the next generation |
247 | * @deactivate: deactivate element in the next generation | |
20a69341 PM |
248 | * @remove: remove element from set |
249 | * @walk: iterate over all set elemeennts | |
250 | * @privsize: function to return size of set private data | |
251 | * @init: initialize private data of new set instance | |
252 | * @destroy: destroy private data of set instance | |
253 | * @list: nf_tables_set_ops list node | |
254 | * @owner: module reference | |
fe2811eb | 255 | * @elemsize: element private size |
20a69341 PM |
256 | * @features: features supported by the implementation |
257 | */ | |
258 | struct nft_set_ops { | |
42a55769 PNA |
259 | bool (*lookup)(const struct net *net, |
260 | const struct nft_set *set, | |
8cd8937a | 261 | const u32 *key, |
b2832dd6 | 262 | const struct nft_set_ext **ext); |
22fe54d5 | 263 | bool (*update)(struct nft_set *set, |
8cd8937a | 264 | const u32 *key, |
22fe54d5 PM |
265 | void *(*new)(struct nft_set *, |
266 | const struct nft_expr *, | |
a55e22e9 | 267 | struct nft_regs *), |
22fe54d5 | 268 | const struct nft_expr *expr, |
a55e22e9 | 269 | struct nft_regs *regs, |
22fe54d5 PM |
270 | const struct nft_set_ext **ext); |
271 | ||
42a55769 PNA |
272 | int (*insert)(const struct net *net, |
273 | const struct nft_set *set, | |
c016c7e4 PNA |
274 | const struct nft_set_elem *elem, |
275 | struct nft_set_ext **ext); | |
42a55769 PNA |
276 | void (*activate)(const struct net *net, |
277 | const struct nft_set *set, | |
cc02e457 | 278 | const struct nft_set_elem *elem); |
42a55769 PNA |
279 | void * (*deactivate)(const struct net *net, |
280 | const struct nft_set *set, | |
cc02e457 | 281 | const struct nft_set_elem *elem); |
20a69341 PM |
282 | void (*remove)(const struct nft_set *set, |
283 | const struct nft_set_elem *elem); | |
284 | void (*walk)(const struct nft_ctx *ctx, | |
285 | const struct nft_set *set, | |
286 | struct nft_set_iter *iter); | |
287 | ||
288 | unsigned int (*privsize)(const struct nlattr * const nla[]); | |
c50b960c PM |
289 | bool (*estimate)(const struct nft_set_desc *desc, |
290 | u32 features, | |
291 | struct nft_set_estimate *est); | |
20a69341 | 292 | int (*init)(const struct nft_set *set, |
c50b960c | 293 | const struct nft_set_desc *desc, |
20a69341 PM |
294 | const struct nlattr * const nla[]); |
295 | void (*destroy)(const struct nft_set *set); | |
296 | ||
297 | struct list_head list; | |
298 | struct module *owner; | |
fe2811eb | 299 | unsigned int elemsize; |
20a69341 PM |
300 | u32 features; |
301 | }; | |
302 | ||
5eccdfaa JP |
303 | int nft_register_set(struct nft_set_ops *ops); |
304 | void nft_unregister_set(struct nft_set_ops *ops); | |
20a69341 PM |
305 | |
306 | /** | |
307 | * struct nft_set - nf_tables set instance | |
308 | * | |
309 | * @list: table set list node | |
310 | * @bindings: list of set bindings | |
311 | * @name: name of the set | |
312 | * @ktype: key type (numeric type defined by userspace, not used in the kernel) | |
313 | * @dtype: data type (verdict or numeric type defined by userspace) | |
c50b960c PM |
314 | * @size: maximum set size |
315 | * @nelems: number of elements | |
3dd0673a | 316 | * @ndeact: number of deactivated elements queued for removal |
761da293 PM |
317 | * @timeout: default timeout value in msecs |
318 | * @gc_int: garbage collection interval in msecs | |
9363dc4b | 319 | * @policy: set parameterization (see enum nft_set_policies) |
e6d8ecac CFG |
320 | * @udlen: user data length |
321 | * @udata: user data | |
20a69341 PM |
322 | * @ops: set ops |
323 | * @flags: set flags | |
37a9cc52 | 324 | * @genmask: generation mask |
20a69341 PM |
325 | * @klen: key length |
326 | * @dlen: data length | |
327 | * @data: private set data | |
328 | */ | |
329 | struct nft_set { | |
330 | struct list_head list; | |
331 | struct list_head bindings; | |
cb39ad8b | 332 | char name[NFT_SET_MAXNAMELEN]; |
20a69341 PM |
333 | u32 ktype; |
334 | u32 dtype; | |
c50b960c | 335 | u32 size; |
3dd0673a PM |
336 | atomic_t nelems; |
337 | u32 ndeact; | |
761da293 PM |
338 | u64 timeout; |
339 | u32 gc_int; | |
9363dc4b | 340 | u16 policy; |
e6d8ecac CFG |
341 | u16 udlen; |
342 | unsigned char *udata; | |
20a69341 PM |
343 | /* runtime data below here */ |
344 | const struct nft_set_ops *ops ____cacheline_aligned; | |
37a9cc52 PNA |
345 | u16 flags:14, |
346 | genmask:2; | |
20a69341 PM |
347 | u8 klen; |
348 | u8 dlen; | |
349 | unsigned char data[] | |
350 | __attribute__((aligned(__alignof__(u64)))); | |
351 | }; | |
352 | ||
353 | static inline void *nft_set_priv(const struct nft_set *set) | |
354 | { | |
355 | return (void *)set->data; | |
356 | } | |
357 | ||
9d098292 PM |
358 | static inline struct nft_set *nft_set_container_of(const void *priv) |
359 | { | |
360 | return (void *)priv - offsetof(struct nft_set, data); | |
361 | } | |
362 | ||
5eccdfaa | 363 | struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
37a9cc52 | 364 | const struct nlattr *nla, u8 genmask); |
958bee14 | 365 | struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
37a9cc52 | 366 | const struct nlattr *nla, u8 genmask); |
20a69341 | 367 | |
761da293 PM |
368 | static inline unsigned long nft_set_gc_interval(const struct nft_set *set) |
369 | { | |
370 | return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; | |
371 | } | |
372 | ||
20a69341 PM |
373 | /** |
374 | * struct nft_set_binding - nf_tables set binding | |
375 | * | |
376 | * @list: set bindings list node | |
377 | * @chain: chain containing the rule bound to the set | |
11113e19 | 378 | * @flags: set action flags |
20a69341 PM |
379 | * |
380 | * A set binding contains all information necessary for validation | |
381 | * of new elements added to a bound set. | |
382 | */ | |
383 | struct nft_set_binding { | |
384 | struct list_head list; | |
385 | const struct nft_chain *chain; | |
11113e19 | 386 | u32 flags; |
20a69341 PM |
387 | }; |
388 | ||
5eccdfaa JP |
389 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
390 | struct nft_set_binding *binding); | |
391 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, | |
392 | struct nft_set_binding *binding); | |
20a69341 | 393 | |
3ac4c07a PM |
394 | /** |
395 | * enum nft_set_extensions - set extension type IDs | |
396 | * | |
397 | * @NFT_SET_EXT_KEY: element key | |
398 | * @NFT_SET_EXT_DATA: mapping data | |
399 | * @NFT_SET_EXT_FLAGS: element flags | |
c3e1b005 PM |
400 | * @NFT_SET_EXT_TIMEOUT: element timeout |
401 | * @NFT_SET_EXT_EXPIRATION: element expiration time | |
68e942e8 | 402 | * @NFT_SET_EXT_USERDATA: user data associated with the element |
f25ad2e9 | 403 | * @NFT_SET_EXT_EXPR: expression assiociated with the element |
3ac4c07a PM |
404 | * @NFT_SET_EXT_NUM: number of extension types |
405 | */ | |
406 | enum nft_set_extensions { | |
407 | NFT_SET_EXT_KEY, | |
408 | NFT_SET_EXT_DATA, | |
409 | NFT_SET_EXT_FLAGS, | |
c3e1b005 PM |
410 | NFT_SET_EXT_TIMEOUT, |
411 | NFT_SET_EXT_EXPIRATION, | |
68e942e8 | 412 | NFT_SET_EXT_USERDATA, |
f25ad2e9 | 413 | NFT_SET_EXT_EXPR, |
3ac4c07a PM |
414 | NFT_SET_EXT_NUM |
415 | }; | |
416 | ||
417 | /** | |
418 | * struct nft_set_ext_type - set extension type | |
419 | * | |
420 | * @len: fixed part length of the extension | |
421 | * @align: alignment requirements of the extension | |
422 | */ | |
423 | struct nft_set_ext_type { | |
424 | u8 len; | |
425 | u8 align; | |
426 | }; | |
427 | ||
428 | extern const struct nft_set_ext_type nft_set_ext_types[]; | |
429 | ||
430 | /** | |
431 | * struct nft_set_ext_tmpl - set extension template | |
432 | * | |
433 | * @len: length of extension area | |
434 | * @offset: offsets of individual extension types | |
435 | */ | |
436 | struct nft_set_ext_tmpl { | |
437 | u16 len; | |
438 | u8 offset[NFT_SET_EXT_NUM]; | |
439 | }; | |
440 | ||
441 | /** | |
442 | * struct nft_set_ext - set extensions | |
443 | * | |
cc02e457 | 444 | * @genmask: generation mask |
3ac4c07a PM |
445 | * @offset: offsets of individual extension types |
446 | * @data: beginning of extension data | |
447 | */ | |
448 | struct nft_set_ext { | |
cc02e457 | 449 | u8 genmask; |
3ac4c07a PM |
450 | u8 offset[NFT_SET_EXT_NUM]; |
451 | char data[0]; | |
452 | }; | |
453 | ||
454 | static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) | |
455 | { | |
456 | memset(tmpl, 0, sizeof(*tmpl)); | |
457 | tmpl->len = sizeof(struct nft_set_ext); | |
458 | } | |
459 | ||
460 | static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, | |
461 | unsigned int len) | |
462 | { | |
463 | tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); | |
464 | BUG_ON(tmpl->len > U8_MAX); | |
465 | tmpl->offset[id] = tmpl->len; | |
466 | tmpl->len += nft_set_ext_types[id].len + len; | |
467 | } | |
468 | ||
469 | static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) | |
470 | { | |
471 | nft_set_ext_add_length(tmpl, id, 0); | |
472 | } | |
473 | ||
474 | static inline void nft_set_ext_init(struct nft_set_ext *ext, | |
475 | const struct nft_set_ext_tmpl *tmpl) | |
476 | { | |
477 | memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); | |
478 | } | |
479 | ||
480 | static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
481 | { | |
482 | return !!ext->offset[id]; | |
483 | } | |
484 | ||
485 | static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
486 | { | |
487 | return ext && __nft_set_ext_exists(ext, id); | |
488 | } | |
489 | ||
490 | static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) | |
491 | { | |
492 | return (void *)ext + ext->offset[id]; | |
493 | } | |
494 | ||
495 | static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) | |
496 | { | |
497 | return nft_set_ext(ext, NFT_SET_EXT_KEY); | |
498 | } | |
499 | ||
500 | static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) | |
501 | { | |
502 | return nft_set_ext(ext, NFT_SET_EXT_DATA); | |
503 | } | |
504 | ||
505 | static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) | |
506 | { | |
507 | return nft_set_ext(ext, NFT_SET_EXT_FLAGS); | |
508 | } | |
ef1f7df9 | 509 | |
c3e1b005 PM |
510 | static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) |
511 | { | |
512 | return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); | |
513 | } | |
514 | ||
515 | static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) | |
516 | { | |
517 | return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); | |
518 | } | |
519 | ||
68e942e8 PM |
520 | static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) |
521 | { | |
522 | return nft_set_ext(ext, NFT_SET_EXT_USERDATA); | |
523 | } | |
524 | ||
f25ad2e9 PM |
525 | static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) |
526 | { | |
527 | return nft_set_ext(ext, NFT_SET_EXT_EXPR); | |
528 | } | |
529 | ||
c3e1b005 PM |
530 | static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) |
531 | { | |
532 | return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && | |
533 | time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); | |
534 | } | |
535 | ||
fe2811eb PM |
536 | static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, |
537 | void *elem) | |
538 | { | |
539 | return elem + set->ops->elemsize; | |
540 | } | |
541 | ||
22fe54d5 PM |
542 | void *nft_set_elem_init(const struct nft_set *set, |
543 | const struct nft_set_ext_tmpl *tmpl, | |
49499c3e | 544 | const u32 *key, const u32 *data, |
22fe54d5 | 545 | u64 timeout, gfp_t gfp); |
61edafbb PM |
546 | void nft_set_elem_destroy(const struct nft_set *set, void *elem); |
547 | ||
cfed7e1b PM |
548 | /** |
549 | * struct nft_set_gc_batch_head - nf_tables set garbage collection batch | |
550 | * | |
551 | * @rcu: rcu head | |
552 | * @set: set the elements belong to | |
553 | * @cnt: count of elements | |
554 | */ | |
555 | struct nft_set_gc_batch_head { | |
556 | struct rcu_head rcu; | |
557 | const struct nft_set *set; | |
558 | unsigned int cnt; | |
559 | }; | |
560 | ||
561 | #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ | |
562 | sizeof(struct nft_set_gc_batch_head)) / \ | |
563 | sizeof(void *)) | |
564 | ||
565 | /** | |
566 | * struct nft_set_gc_batch - nf_tables set garbage collection batch | |
567 | * | |
568 | * @head: GC batch head | |
569 | * @elems: garbage collection elements | |
570 | */ | |
571 | struct nft_set_gc_batch { | |
572 | struct nft_set_gc_batch_head head; | |
573 | void *elems[NFT_SET_GC_BATCH_SIZE]; | |
574 | }; | |
575 | ||
576 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, | |
577 | gfp_t gfp); | |
578 | void nft_set_gc_batch_release(struct rcu_head *rcu); | |
579 | ||
580 | static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) | |
581 | { | |
582 | if (gcb != NULL) | |
583 | call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); | |
584 | } | |
585 | ||
586 | static inline struct nft_set_gc_batch * | |
587 | nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, | |
588 | gfp_t gfp) | |
589 | { | |
590 | if (gcb != NULL) { | |
591 | if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) | |
592 | return gcb; | |
593 | nft_set_gc_batch_complete(gcb); | |
594 | } | |
595 | return nft_set_gc_batch_alloc(set, gfp); | |
596 | } | |
597 | ||
598 | static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, | |
599 | void *elem) | |
600 | { | |
601 | gcb->elems[gcb->head.cnt++] = elem; | |
602 | } | |
603 | ||
96518518 | 604 | /** |
ef1f7df9 | 605 | * struct nft_expr_type - nf_tables expression type |
96518518 | 606 | * |
ef1f7df9 PM |
607 | * @select_ops: function to select nft_expr_ops |
608 | * @ops: default ops, used when no select_ops functions is present | |
96518518 PM |
609 | * @list: used internally |
610 | * @name: Identifier | |
611 | * @owner: module reference | |
612 | * @policy: netlink attribute policy | |
613 | * @maxattr: highest netlink attribute number | |
64d46806 | 614 | * @family: address family for AF-specific types |
151d799a | 615 | * @flags: expression type flags |
ef1f7df9 PM |
616 | */ |
617 | struct nft_expr_type { | |
0ca743a5 PNA |
618 | const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
619 | const struct nlattr * const tb[]); | |
ef1f7df9 PM |
620 | const struct nft_expr_ops *ops; |
621 | struct list_head list; | |
622 | const char *name; | |
623 | struct module *owner; | |
624 | const struct nla_policy *policy; | |
625 | unsigned int maxattr; | |
64d46806 | 626 | u8 family; |
151d799a | 627 | u8 flags; |
ef1f7df9 PM |
628 | }; |
629 | ||
151d799a PM |
630 | #define NFT_EXPR_STATEFUL 0x1 |
631 | ||
ef1f7df9 PM |
632 | /** |
633 | * struct nft_expr_ops - nf_tables expression operations | |
634 | * | |
635 | * @eval: Expression evaluation function | |
96518518 | 636 | * @size: full expression size, including private data size |
ef1f7df9 PM |
637 | * @init: initialization function |
638 | * @destroy: destruction function | |
639 | * @dump: function to dump parameters | |
640 | * @type: expression type | |
0ca743a5 PNA |
641 | * @validate: validate expression, called during loop detection |
642 | * @data: extra data to attach to this expression operation | |
96518518 PM |
643 | */ |
644 | struct nft_expr; | |
645 | struct nft_expr_ops { | |
646 | void (*eval)(const struct nft_expr *expr, | |
a55e22e9 | 647 | struct nft_regs *regs, |
96518518 | 648 | const struct nft_pktinfo *pkt); |
086f3321 PNA |
649 | int (*clone)(struct nft_expr *dst, |
650 | const struct nft_expr *src); | |
ef1f7df9 PM |
651 | unsigned int size; |
652 | ||
96518518 PM |
653 | int (*init)(const struct nft_ctx *ctx, |
654 | const struct nft_expr *expr, | |
655 | const struct nlattr * const tb[]); | |
62472bce PM |
656 | void (*destroy)(const struct nft_ctx *ctx, |
657 | const struct nft_expr *expr); | |
96518518 PM |
658 | int (*dump)(struct sk_buff *skb, |
659 | const struct nft_expr *expr); | |
0ca743a5 PNA |
660 | int (*validate)(const struct nft_ctx *ctx, |
661 | const struct nft_expr *expr, | |
662 | const struct nft_data **data); | |
ef1f7df9 | 663 | const struct nft_expr_type *type; |
0ca743a5 | 664 | void *data; |
96518518 PM |
665 | }; |
666 | ||
ef1f7df9 | 667 | #define NFT_EXPR_MAXATTR 16 |
96518518 PM |
668 | #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ |
669 | ALIGN(size, __alignof__(struct nft_expr))) | |
670 | ||
671 | /** | |
672 | * struct nft_expr - nf_tables expression | |
673 | * | |
674 | * @ops: expression ops | |
675 | * @data: expression private data | |
676 | */ | |
677 | struct nft_expr { | |
678 | const struct nft_expr_ops *ops; | |
679 | unsigned char data[]; | |
680 | }; | |
681 | ||
682 | static inline void *nft_expr_priv(const struct nft_expr *expr) | |
683 | { | |
684 | return (void *)expr->data; | |
685 | } | |
686 | ||
0b2d8a7b PM |
687 | struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, |
688 | const struct nlattr *nla); | |
689 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); | |
690 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, | |
691 | const struct nft_expr *expr); | |
692 | ||
086f3321 | 693 | static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) |
0b2d8a7b | 694 | { |
086f3321 PNA |
695 | int err; |
696 | ||
0b2d8a7b | 697 | __module_get(src->ops->type->owner); |
086f3321 PNA |
698 | if (src->ops->clone) { |
699 | dst->ops = src->ops; | |
700 | err = src->ops->clone(dst, src); | |
701 | if (err < 0) | |
702 | return err; | |
703 | } else { | |
704 | memcpy(dst, src, src->ops->size); | |
705 | } | |
706 | return 0; | |
0b2d8a7b PM |
707 | } |
708 | ||
96518518 PM |
709 | /** |
710 | * struct nft_rule - nf_tables rule | |
711 | * | |
712 | * @list: used internally | |
96518518 | 713 | * @handle: rule handle |
0628b123 | 714 | * @genmask: generation mask |
96518518 | 715 | * @dlen: length of expression data |
86f1ec32 | 716 | * @udata: user data is appended to the rule |
96518518 PM |
717 | * @data: expression data |
718 | */ | |
719 | struct nft_rule { | |
720 | struct list_head list; | |
0768b3b3 | 721 | u64 handle:42, |
0628b123 | 722 | genmask:2, |
0768b3b3 | 723 | dlen:12, |
86f1ec32 | 724 | udata:1; |
96518518 PM |
725 | unsigned char data[] |
726 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
727 | }; | |
728 | ||
729 | static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) | |
730 | { | |
731 | return (struct nft_expr *)&rule->data[0]; | |
732 | } | |
733 | ||
734 | static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) | |
735 | { | |
736 | return ((void *)expr) + expr->ops->size; | |
737 | } | |
738 | ||
739 | static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) | |
740 | { | |
741 | return (struct nft_expr *)&rule->data[rule->dlen]; | |
742 | } | |
743 | ||
86f1ec32 | 744 | static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
0768b3b3 PNA |
745 | { |
746 | return (void *)&rule->data[rule->dlen]; | |
747 | } | |
748 | ||
96518518 PM |
749 | /* |
750 | * The last pointer isn't really necessary, but the compiler isn't able to | |
751 | * determine that the result of nft_expr_last() is always the same since it | |
752 | * can't assume that the dlen value wasn't changed within calls in the loop. | |
753 | */ | |
754 | #define nft_rule_for_each_expr(expr, last, rule) \ | |
755 | for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ | |
756 | (expr) != (last); \ | |
757 | (expr) = nft_expr_next(expr)) | |
758 | ||
759 | enum nft_chain_flags { | |
760 | NFT_BASE_CHAIN = 0x1, | |
96518518 PM |
761 | }; |
762 | ||
763 | /** | |
764 | * struct nft_chain - nf_tables chain | |
765 | * | |
766 | * @rules: list of rules in the chain | |
767 | * @list: used internally | |
b5bc89bf | 768 | * @table: table that this chain belongs to |
96518518 | 769 | * @handle: chain handle |
96518518 PM |
770 | * @use: number of jump references to this chain |
771 | * @level: length of longest path to this chain | |
a0a7379e | 772 | * @flags: bitmask of enum nft_chain_flags |
96518518 PM |
773 | * @name: name of the chain |
774 | */ | |
775 | struct nft_chain { | |
776 | struct list_head rules; | |
777 | struct list_head list; | |
b5bc89bf | 778 | struct nft_table *table; |
96518518 | 779 | u64 handle; |
a0a7379e | 780 | u32 use; |
96518518 | 781 | u16 level; |
664b0f8c PNA |
782 | u8 flags:6, |
783 | genmask:2; | |
96518518 PM |
784 | char name[NFT_CHAIN_MAXNAMELEN]; |
785 | }; | |
786 | ||
9370761c PNA |
787 | enum nft_chain_type { |
788 | NFT_CHAIN_T_DEFAULT = 0, | |
789 | NFT_CHAIN_T_ROUTE, | |
790 | NFT_CHAIN_T_NAT, | |
791 | NFT_CHAIN_T_MAX | |
792 | }; | |
793 | ||
1a1e1a12 PM |
794 | /** |
795 | * struct nf_chain_type - nf_tables chain type info | |
796 | * | |
797 | * @name: name of the type | |
798 | * @type: numeric identifier | |
799 | * @family: address family | |
800 | * @owner: module owner | |
801 | * @hook_mask: mask of valid hooks | |
802 | * @hooks: hookfn overrides | |
803 | */ | |
804 | struct nf_chain_type { | |
805 | const char *name; | |
806 | enum nft_chain_type type; | |
807 | int family; | |
808 | struct module *owner; | |
809 | unsigned int hook_mask; | |
810 | nf_hookfn *hooks[NF_MAX_HOOKS]; | |
811 | }; | |
812 | ||
7210e4e3 PNA |
813 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
814 | enum nft_chain_type type); | |
75e8d06d PNA |
815 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
816 | unsigned int hook_flags); | |
7210e4e3 | 817 | |
0ca743a5 | 818 | struct nft_stats { |
ce355e20 ED |
819 | u64 bytes; |
820 | u64 pkts; | |
821 | struct u64_stats_sync syncp; | |
0ca743a5 PNA |
822 | }; |
823 | ||
115a60b1 PM |
824 | #define NFT_HOOK_OPS_MAX 2 |
825 | ||
96518518 PM |
826 | /** |
827 | * struct nft_base_chain - nf_tables base chain | |
828 | * | |
829 | * @ops: netfilter hook ops | |
9370761c | 830 | * @type: chain type |
0ca743a5 PNA |
831 | * @policy: default policy |
832 | * @stats: per-cpu chain stats | |
96518518 | 833 | * @chain: the chain |
2cbce139 | 834 | * @dev_name: device name that this base chain is attached to (if any) |
96518518 PM |
835 | */ |
836 | struct nft_base_chain { | |
115a60b1 | 837 | struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; |
2a37d755 | 838 | const struct nf_chain_type *type; |
0ca743a5 | 839 | u8 policy; |
835b8033 | 840 | u8 flags; |
0ca743a5 | 841 | struct nft_stats __percpu *stats; |
96518518 | 842 | struct nft_chain chain; |
2cbce139 | 843 | char dev_name[IFNAMSIZ]; |
96518518 PM |
844 | }; |
845 | ||
846 | static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) | |
847 | { | |
848 | return container_of(chain, struct nft_base_chain, chain); | |
849 | } | |
850 | ||
5ebe0b0e | 851 | int __nft_release_basechain(struct nft_ctx *ctx); |
835b8033 | 852 | |
06198b34 | 853 | unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); |
96518518 | 854 | |
96518518 PM |
855 | /** |
856 | * struct nft_table - nf_tables table | |
857 | * | |
858 | * @list: used internally | |
859 | * @chains: chains in the table | |
860 | * @sets: sets in the table | |
861 | * @hgenerator: handle generator state | |
862 | * @use: number of chain references to this table | |
863 | * @flags: table flag (see enum nft_table_flags) | |
f2a6d766 | 864 | * @genmask: generation mask |
96518518 PM |
865 | * @name: name of the table |
866 | */ | |
867 | struct nft_table { | |
868 | struct list_head list; | |
869 | struct list_head chains; | |
870 | struct list_head sets; | |
871 | u64 hgenerator; | |
872 | u32 use; | |
f2a6d766 PNA |
873 | u16 flags:14, |
874 | genmask:2; | |
1cae565e | 875 | char name[NFT_TABLE_MAXNAMELEN]; |
ebddf1a8 PNA |
876 | }; |
877 | ||
878 | enum nft_af_flags { | |
879 | NFT_AF_NEEDS_DEV = (1 << 0), | |
96518518 PM |
880 | }; |
881 | ||
882 | /** | |
883 | * struct nft_af_info - nf_tables address family info | |
884 | * | |
885 | * @list: used internally | |
886 | * @family: address family | |
887 | * @nhooks: number of hooks in this family | |
888 | * @owner: module owner | |
889 | * @tables: used internally | |
ebddf1a8 | 890 | * @flags: family flags |
115a60b1 PM |
891 | * @nops: number of hook ops in this family |
892 | * @hook_ops_init: initialization function for chain hook ops | |
96518518 PM |
893 | * @hooks: hookfn overrides for packet validation |
894 | */ | |
895 | struct nft_af_info { | |
896 | struct list_head list; | |
897 | int family; | |
898 | unsigned int nhooks; | |
899 | struct module *owner; | |
900 | struct list_head tables; | |
ebddf1a8 | 901 | u32 flags; |
115a60b1 PM |
902 | unsigned int nops; |
903 | void (*hook_ops_init)(struct nf_hook_ops *, | |
904 | unsigned int); | |
96518518 PM |
905 | nf_hookfn *hooks[NF_MAX_HOOKS]; |
906 | }; | |
907 | ||
5eccdfaa | 908 | int nft_register_afinfo(struct net *, struct nft_af_info *); |
df05ef87 | 909 | void nft_unregister_afinfo(struct net *, struct nft_af_info *); |
96518518 | 910 | |
2a37d755 PM |
911 | int nft_register_chain_type(const struct nf_chain_type *); |
912 | void nft_unregister_chain_type(const struct nf_chain_type *); | |
96518518 | 913 | |
5eccdfaa JP |
914 | int nft_register_expr(struct nft_expr_type *); |
915 | void nft_unregister_expr(struct nft_expr_type *); | |
96518518 | 916 | |
33d5a7b1 FW |
917 | int nft_verdict_dump(struct sk_buff *skb, int type, |
918 | const struct nft_verdict *v); | |
919 | ||
920 | /** | |
921 | * struct nft_traceinfo - nft tracing information and state | |
922 | * | |
923 | * @pkt: pktinfo currently processed | |
924 | * @basechain: base chain currently processed | |
925 | * @chain: chain currently processed | |
926 | * @rule: rule that was evaluated | |
927 | * @verdict: verdict given by rule | |
928 | * @type: event type (enum nft_trace_types) | |
929 | * @packet_dumped: packet headers sent in a previous traceinfo message | |
930 | * @trace: other struct members are initialised | |
931 | */ | |
932 | struct nft_traceinfo { | |
933 | const struct nft_pktinfo *pkt; | |
934 | const struct nft_base_chain *basechain; | |
935 | const struct nft_chain *chain; | |
936 | const struct nft_rule *rule; | |
937 | const struct nft_verdict *verdict; | |
938 | enum nft_trace_types type; | |
939 | bool packet_dumped; | |
940 | bool trace; | |
941 | }; | |
942 | ||
943 | void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, | |
944 | const struct nft_verdict *verdict, | |
945 | const struct nft_chain *basechain); | |
946 | ||
947 | void nft_trace_notify(struct nft_traceinfo *info); | |
948 | ||
67a8fc27 PM |
949 | #define nft_dereference(p) \ |
950 | nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) | |
951 | ||
96518518 PM |
952 | #define MODULE_ALIAS_NFT_FAMILY(family) \ |
953 | MODULE_ALIAS("nft-afinfo-" __stringify(family)) | |
954 | ||
9370761c PNA |
955 | #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
956 | MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) | |
96518518 | 957 | |
64d46806 PM |
958 | #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
959 | MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) | |
960 | ||
96518518 PM |
961 | #define MODULE_ALIAS_NFT_EXPR(name) \ |
962 | MODULE_ALIAS("nft-expr-" name) | |
963 | ||
20a69341 PM |
964 | #define MODULE_ALIAS_NFT_SET() \ |
965 | MODULE_ALIAS("nft-set") | |
966 | ||
ea4bd995 PM |
967 | /* |
968 | * The gencursor defines two generations, the currently active and the | |
969 | * next one. Objects contain a bitmask of 2 bits specifying the generations | |
970 | * they're active in. A set bit means they're inactive in the generation | |
971 | * represented by that bit. | |
972 | * | |
973 | * New objects start out as inactive in the current and active in the | |
974 | * next generation. When committing the ruleset the bitmask is cleared, | |
975 | * meaning they're active in all generations. When removing an object, | |
976 | * it is set inactive in the next generation. After committing the ruleset, | |
977 | * the objects are removed. | |
978 | */ | |
979 | static inline unsigned int nft_gencursor_next(const struct net *net) | |
980 | { | |
981 | return net->nft.gencursor + 1 == 1 ? 1 : 0; | |
982 | } | |
983 | ||
984 | static inline u8 nft_genmask_next(const struct net *net) | |
985 | { | |
986 | return 1 << nft_gencursor_next(net); | |
987 | } | |
988 | ||
989 | static inline u8 nft_genmask_cur(const struct net *net) | |
990 | { | |
991 | /* Use ACCESS_ONCE() to prevent refetching the value for atomicity */ | |
992 | return 1 << ACCESS_ONCE(net->nft.gencursor); | |
993 | } | |
994 | ||
22fe54d5 PM |
995 | #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) |
996 | ||
889f7ee7 PNA |
997 | /* |
998 | * Generic transaction helpers | |
999 | */ | |
1000 | ||
1001 | /* Check if this object is currently active. */ | |
1002 | #define nft_is_active(__net, __obj) \ | |
1003 | (((__obj)->genmask & nft_genmask_cur(__net)) == 0) | |
1004 | ||
1005 | /* Check if this object is active in the next generation. */ | |
1006 | #define nft_is_active_next(__net, __obj) \ | |
1007 | (((__obj)->genmask & nft_genmask_next(__net)) == 0) | |
1008 | ||
1009 | /* This object becomes active in the next generation. */ | |
1010 | #define nft_activate_next(__net, __obj) \ | |
1011 | (__obj)->genmask = nft_genmask_cur(__net) | |
1012 | ||
1013 | /* This object becomes inactive in the next generation. */ | |
1014 | #define nft_deactivate_next(__net, __obj) \ | |
1015 | (__obj)->genmask = nft_genmask_next(__net) | |
1016 | ||
1017 | /* After committing the ruleset, clear the stale generation bit. */ | |
1018 | #define nft_clear(__net, __obj) \ | |
1019 | (__obj)->genmask &= ~nft_genmask_next(__net) | |
f2a6d766 PNA |
1020 | #define nft_active_genmask(__obj, __genmask) \ |
1021 | !((__obj)->genmask & __genmask) | |
889f7ee7 | 1022 | |
cc02e457 PM |
1023 | /* |
1024 | * Set element transaction helpers | |
1025 | */ | |
1026 | ||
1027 | static inline bool nft_set_elem_active(const struct nft_set_ext *ext, | |
1028 | u8 genmask) | |
1029 | { | |
1030 | return !(ext->genmask & genmask); | |
1031 | } | |
1032 | ||
42a55769 PNA |
1033 | static inline void nft_set_elem_change_active(const struct net *net, |
1034 | const struct nft_set *set, | |
cc02e457 PM |
1035 | struct nft_set_ext *ext) |
1036 | { | |
42a55769 | 1037 | ext->genmask ^= nft_genmask_next(net); |
cc02e457 PM |
1038 | } |
1039 | ||
69086658 PM |
1040 | /* |
1041 | * We use a free bit in the genmask field to indicate the element | |
1042 | * is busy, meaning it is currently being processed either by | |
1043 | * the netlink API or GC. | |
1044 | * | |
1045 | * Even though the genmask is only a single byte wide, this works | |
1046 | * because the extension structure if fully constant once initialized, | |
1047 | * so there are no non-atomic write accesses unless it is already | |
1048 | * marked busy. | |
1049 | */ | |
1050 | #define NFT_SET_ELEM_BUSY_MASK (1 << 2) | |
1051 | ||
1052 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
1053 | #define NFT_SET_ELEM_BUSY_BIT 2 | |
1054 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
1055 | #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) | |
1056 | #else | |
1057 | #error | |
1058 | #endif | |
1059 | ||
1060 | static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) | |
1061 | { | |
1062 | unsigned long *word = (unsigned long *)ext; | |
1063 | ||
1064 | BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); | |
1065 | return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1066 | } | |
1067 | ||
1068 | static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) | |
1069 | { | |
1070 | unsigned long *word = (unsigned long *)ext; | |
1071 | ||
1072 | clear_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1073 | } | |
1074 | ||
1a1e1a12 PM |
1075 | /** |
1076 | * struct nft_trans - nf_tables object update in transaction | |
1077 | * | |
1078 | * @list: used internally | |
1079 | * @msg_type: message type | |
1080 | * @ctx: transaction context | |
1081 | * @data: internal information related to the transaction | |
1082 | */ | |
1083 | struct nft_trans { | |
1084 | struct list_head list; | |
1085 | int msg_type; | |
1086 | struct nft_ctx ctx; | |
1087 | char data[0]; | |
1088 | }; | |
1089 | ||
1090 | struct nft_trans_rule { | |
1091 | struct nft_rule *rule; | |
1092 | }; | |
1093 | ||
1094 | #define nft_trans_rule(trans) \ | |
1095 | (((struct nft_trans_rule *)trans->data)->rule) | |
1096 | ||
1097 | struct nft_trans_set { | |
1098 | struct nft_set *set; | |
1099 | u32 set_id; | |
1100 | }; | |
1101 | ||
1102 | #define nft_trans_set(trans) \ | |
1103 | (((struct nft_trans_set *)trans->data)->set) | |
1104 | #define nft_trans_set_id(trans) \ | |
1105 | (((struct nft_trans_set *)trans->data)->set_id) | |
1106 | ||
1107 | struct nft_trans_chain { | |
1108 | bool update; | |
1109 | char name[NFT_CHAIN_MAXNAMELEN]; | |
1110 | struct nft_stats __percpu *stats; | |
1111 | u8 policy; | |
1112 | }; | |
1113 | ||
1114 | #define nft_trans_chain_update(trans) \ | |
1115 | (((struct nft_trans_chain *)trans->data)->update) | |
1116 | #define nft_trans_chain_name(trans) \ | |
1117 | (((struct nft_trans_chain *)trans->data)->name) | |
1118 | #define nft_trans_chain_stats(trans) \ | |
1119 | (((struct nft_trans_chain *)trans->data)->stats) | |
1120 | #define nft_trans_chain_policy(trans) \ | |
1121 | (((struct nft_trans_chain *)trans->data)->policy) | |
1122 | ||
1123 | struct nft_trans_table { | |
1124 | bool update; | |
1125 | bool enable; | |
1126 | }; | |
1127 | ||
1128 | #define nft_trans_table_update(trans) \ | |
1129 | (((struct nft_trans_table *)trans->data)->update) | |
1130 | #define nft_trans_table_enable(trans) \ | |
1131 | (((struct nft_trans_table *)trans->data)->enable) | |
1132 | ||
1133 | struct nft_trans_elem { | |
1134 | struct nft_set *set; | |
1135 | struct nft_set_elem elem; | |
1136 | }; | |
1137 | ||
1138 | #define nft_trans_elem_set(trans) \ | |
1139 | (((struct nft_trans_elem *)trans->data)->set) | |
1140 | #define nft_trans_elem(trans) \ | |
1141 | (((struct nft_trans_elem *)trans->data)->elem) | |
1142 | ||
96518518 | 1143 | #endif /* _NET_NF_TABLES_H */ |