Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
96518518 PM |
2 | #ifndef _NET_NF_TABLES_H |
3 | #define _NET_NF_TABLES_H | |
4 | ||
a1b840ad | 5 | #include <asm/unaligned.h> |
96518518 PM |
6 | #include <linux/list.h> |
7 | #include <linux/netfilter.h> | |
67a8fc27 | 8 | #include <linux/netfilter/nfnetlink.h> |
0ca743a5 | 9 | #include <linux/netfilter/x_tables.h> |
96518518 | 10 | #include <linux/netfilter/nf_tables.h> |
ce355e20 | 11 | #include <linux/u64_stats_sync.h> |
1b2470e5 | 12 | #include <linux/rhashtable.h> |
3b49e2e9 | 13 | #include <net/netfilter/nf_flow_table.h> |
96518518 | 14 | #include <net/netlink.h> |
14bfb13f | 15 | #include <net/flow_offload.h> |
d59d2f82 | 16 | #include <net/netns/generic.h> |
96518518 | 17 | |
d25e2e93 PNA |
18 | #define NFT_MAX_HOOKS (NF_INET_INGRESS + 1) |
19 | ||
a4cb98f3 PG |
20 | struct module; |
21 | ||
20a69341 PM |
22 | #define NFT_JUMP_STACK_SIZE 16 |
23 | ||
b5bdc6f9 PNA |
24 | enum { |
25 | NFT_PKTINFO_L4PROTO = (1 << 0), | |
c46b38dc | 26 | NFT_PKTINFO_INNER = (1 << 1), |
b5bdc6f9 PNA |
27 | }; |
28 | ||
96518518 PM |
29 | struct nft_pktinfo { |
30 | struct sk_buff *skb; | |
897389de | 31 | const struct nf_hook_state *state; |
b5bdc6f9 | 32 | u8 flags; |
4566bf27 | 33 | u8 tprot; |
897389de FW |
34 | u16 fragoff; |
35 | unsigned int thoff; | |
c46b38dc | 36 | unsigned int inneroff; |
96518518 PM |
37 | }; |
38 | ||
85554eb9 FW |
39 | static inline struct sock *nft_sk(const struct nft_pktinfo *pkt) |
40 | { | |
897389de | 41 | return pkt->state->sk; |
85554eb9 FW |
42 | } |
43 | ||
2d7b4ace FW |
44 | static inline unsigned int nft_thoff(const struct nft_pktinfo *pkt) |
45 | { | |
897389de | 46 | return pkt->thoff; |
2d7b4ace FW |
47 | } |
48 | ||
0e5a1c7e PNA |
49 | static inline struct net *nft_net(const struct nft_pktinfo *pkt) |
50 | { | |
897389de | 51 | return pkt->state->net; |
0e5a1c7e PNA |
52 | } |
53 | ||
54 | static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) | |
55 | { | |
897389de | 56 | return pkt->state->hook; |
0e5a1c7e PNA |
57 | } |
58 | ||
59 | static inline u8 nft_pf(const struct nft_pktinfo *pkt) | |
60 | { | |
897389de | 61 | return pkt->state->pf; |
0e5a1c7e PNA |
62 | } |
63 | ||
64 | static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) | |
65 | { | |
897389de | 66 | return pkt->state->in; |
0e5a1c7e PNA |
67 | } |
68 | ||
69 | static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) | |
70 | { | |
897389de | 71 | return pkt->state->out; |
0e5a1c7e PNA |
72 | } |
73 | ||
0ca743a5 | 74 | static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
0ca743a5 | 75 | struct sk_buff *skb, |
073bfd56 | 76 | const struct nf_hook_state *state) |
0ca743a5 PNA |
77 | { |
78 | pkt->skb = skb; | |
897389de | 79 | pkt->state = state; |
0ca743a5 PNA |
80 | } |
81 | ||
f06ad944 | 82 | static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt) |
beac5afa | 83 | { |
b5bdc6f9 | 84 | pkt->flags = 0; |
beac5afa | 85 | pkt->tprot = 0; |
897389de FW |
86 | pkt->thoff = 0; |
87 | pkt->fragoff = 0; | |
beac5afa PNA |
88 | } |
89 | ||
a55e22e9 PM |
90 | /** |
91 | * struct nft_verdict - nf_tables verdict | |
92 | * | |
93 | * @code: nf_tables/netfilter verdict code | |
94 | * @chain: destination chain for NFT_JUMP/NFT_GOTO | |
95 | */ | |
96 | struct nft_verdict { | |
97 | u32 code; | |
98 | struct nft_chain *chain; | |
99 | }; | |
100 | ||
96518518 PM |
101 | struct nft_data { |
102 | union { | |
1ca2e170 PM |
103 | u32 data[4]; |
104 | struct nft_verdict verdict; | |
96518518 PM |
105 | }; |
106 | } __attribute__((aligned(__alignof__(u64)))); | |
107 | ||
642c8eff PNA |
108 | #define NFT_REG32_NUM 20 |
109 | ||
a55e22e9 PM |
110 | /** |
111 | * struct nft_regs - nf_tables register set | |
112 | * | |
113 | * @data: data registers | |
114 | * @verdict: verdict register | |
115 | * | |
116 | * The first four data registers alias to the verdict register. | |
117 | */ | |
118 | struct nft_regs { | |
119 | union { | |
642c8eff | 120 | u32 data[NFT_REG32_NUM]; |
a55e22e9 PM |
121 | struct nft_verdict verdict; |
122 | }; | |
123 | }; | |
124 | ||
12e4ecfa PNA |
125 | struct nft_regs_track { |
126 | struct { | |
127 | const struct nft_expr *selector; | |
128 | const struct nft_expr *bitwise; | |
34cc9e52 | 129 | u8 num_reg; |
12e4ecfa PNA |
130 | } regs[NFT_REG32_NUM]; |
131 | ||
132 | const struct nft_expr *cur; | |
133 | const struct nft_expr *last; | |
134 | }; | |
135 | ||
a1b840ad | 136 | /* Store/load an u8, u16 or u64 integer to/from the u32 data register. |
10596608 LZ |
137 | * |
138 | * Note, when using concatenations, register allocation happens at 32-bit | |
139 | * level. So for store instruction, pad the rest part with zero to avoid | |
140 | * garbage values. | |
141 | */ | |
142 | ||
a1b840ad | 143 | static inline void nft_reg_store8(u32 *dreg, u8 val) |
10596608 LZ |
144 | { |
145 | *dreg = 0; | |
a1b840ad | 146 | *(u8 *)dreg = val; |
10596608 LZ |
147 | } |
148 | ||
7cd9a58d | 149 | static inline u8 nft_reg_load8(const u32 *sreg) |
a1b840ad AJ |
150 | { |
151 | return *(u8 *)sreg; | |
152 | } | |
153 | ||
154 | static inline void nft_reg_store16(u32 *dreg, u16 val) | |
10596608 LZ |
155 | { |
156 | *dreg = 0; | |
a1b840ad | 157 | *(u16 *)dreg = val; |
10596608 LZ |
158 | } |
159 | ||
7cd9a58d | 160 | static inline u16 nft_reg_load16(const u32 *sreg) |
10596608 LZ |
161 | { |
162 | return *(u16 *)sreg; | |
163 | } | |
164 | ||
a1b840ad | 165 | static inline void nft_reg_store64(u32 *dreg, u64 val) |
10596608 | 166 | { |
a1b840ad AJ |
167 | put_unaligned(val, (u64 *)dreg); |
168 | } | |
169 | ||
7cd9a58d | 170 | static inline u64 nft_reg_load64(const u32 *sreg) |
a1b840ad AJ |
171 | { |
172 | return get_unaligned((u64 *)sreg); | |
10596608 LZ |
173 | } |
174 | ||
49499c3e PM |
175 | static inline void nft_data_copy(u32 *dst, const struct nft_data *src, |
176 | unsigned int len) | |
96518518 | 177 | { |
1e105e6a FW |
178 | if (len % NFT_REG32_SIZE) |
179 | dst[len / NFT_REG32_SIZE] = 0; | |
49499c3e | 180 | memcpy(dst, src, len); |
96518518 PM |
181 | } |
182 | ||
96518518 | 183 | /** |
20a69341 | 184 | * struct nft_ctx - nf_tables rule/set context |
96518518 | 185 | * |
99633ab2 | 186 | * @net: net namespace |
96518518 PM |
187 | * @table: the table the chain is contained in |
188 | * @chain: the chain the rule is contained in | |
0ca743a5 | 189 | * @nla: netlink attributes |
128ad332 PNA |
190 | * @portid: netlink portID of the original message |
191 | * @seq: netlink sequence number | |
36596dad | 192 | * @family: protocol family |
26b2f552 | 193 | * @level: depth of the chains |
128ad332 | 194 | * @report: notify via unicast netlink message |
96518518 PM |
195 | */ |
196 | struct nft_ctx { | |
99633ab2 | 197 | struct net *net; |
7c95f6d8 PNA |
198 | struct nft_table *table; |
199 | struct nft_chain *chain; | |
0ca743a5 | 200 | const struct nlattr * const *nla; |
128ad332 PNA |
201 | u32 portid; |
202 | u32 seq; | |
c9626a2c | 203 | u16 flags; |
36596dad | 204 | u8 family; |
26b2f552 | 205 | u8 level; |
128ad332 | 206 | bool report; |
96518518 PM |
207 | }; |
208 | ||
96518518 PM |
209 | struct nft_data_desc { |
210 | enum nft_data_types type; | |
211 | unsigned int len; | |
212 | }; | |
213 | ||
d0a11fc3 PM |
214 | int nft_data_init(const struct nft_ctx *ctx, |
215 | struct nft_data *data, unsigned int size, | |
5eccdfaa | 216 | struct nft_data_desc *desc, const struct nlattr *nla); |
bb7b40ae | 217 | void nft_data_hold(const struct nft_data *data, enum nft_data_types type); |
59105446 | 218 | void nft_data_release(const struct nft_data *data, enum nft_data_types type); |
5eccdfaa JP |
219 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, |
220 | enum nft_data_types type, unsigned int len); | |
96518518 PM |
221 | |
222 | static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) | |
223 | { | |
224 | return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; | |
225 | } | |
226 | ||
20a69341 PM |
227 | static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
228 | { | |
bf798657 | 229 | return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; |
20a69341 PM |
230 | } |
231 | ||
f1d505bb | 232 | int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); |
b1c96ed3 PM |
233 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); |
234 | ||
4f16d25c | 235 | int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len); |
345023b0 PNA |
236 | int nft_parse_register_store(const struct nft_ctx *ctx, |
237 | const struct nlattr *attr, u8 *dreg, | |
238 | const struct nft_data *data, | |
239 | enum nft_data_types type, unsigned int len); | |
96518518 | 240 | |
86f1ec32 PM |
241 | /** |
242 | * struct nft_userdata - user defined data associated with an object | |
243 | * | |
244 | * @len: length of the data | |
245 | * @data: content | |
246 | * | |
247 | * The presence of user data is indicated in an object specific fashion, | |
248 | * so a length of zero can't occur and the value "len" indicates data | |
249 | * of length len + 1. | |
250 | */ | |
251 | struct nft_userdata { | |
252 | u8 len; | |
6daf1414 | 253 | unsigned char data[]; |
86f1ec32 PM |
254 | }; |
255 | ||
20a69341 PM |
256 | /** |
257 | * struct nft_set_elem - generic representation of set elements | |
258 | * | |
20a69341 | 259 | * @key: element key |
7b225d0b | 260 | * @key_end: closing element key |
fe2811eb | 261 | * @priv: element private data and extensions |
20a69341 PM |
262 | */ |
263 | struct nft_set_elem { | |
7d740264 PM |
264 | union { |
265 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
266 | struct nft_data val; | |
267 | } key; | |
7b225d0b PNA |
268 | union { |
269 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
270 | struct nft_data val; | |
271 | } key_end; | |
fdb9c405 PNA |
272 | union { |
273 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
274 | struct nft_data val; | |
275 | } data; | |
fe2811eb | 276 | void *priv; |
20a69341 PM |
277 | }; |
278 | ||
279 | struct nft_set; | |
280 | struct nft_set_iter { | |
8588ac09 | 281 | u8 genmask; |
20a69341 PM |
282 | unsigned int count; |
283 | unsigned int skip; | |
284 | int err; | |
285 | int (*fn)(const struct nft_ctx *ctx, | |
de70185d | 286 | struct nft_set *set, |
20a69341 | 287 | const struct nft_set_iter *iter, |
de70185d | 288 | struct nft_set_elem *elem); |
20a69341 PM |
289 | }; |
290 | ||
c50b960c PM |
291 | /** |
292 | * struct nft_set_desc - description of set elements | |
293 | * | |
294 | * @klen: key length | |
295 | * @dlen: data length | |
296 | * @size: number of set elements | |
f3a2181e SB |
297 | * @field_len: length of each field in concatenation, bytes |
298 | * @field_count: number of concatenated fields in element | |
d56aab26 | 299 | * @expr: set must support for expressions |
c50b960c PM |
300 | */ |
301 | struct nft_set_desc { | |
302 | unsigned int klen; | |
303 | unsigned int dlen; | |
304 | unsigned int size; | |
f3a2181e SB |
305 | u8 field_len[NFT_REG32_COUNT]; |
306 | u8 field_count; | |
d56aab26 | 307 | bool expr; |
c50b960c PM |
308 | }; |
309 | ||
310 | /** | |
311 | * enum nft_set_class - performance class | |
312 | * | |
313 | * @NFT_LOOKUP_O_1: constant, O(1) | |
314 | * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) | |
315 | * @NFT_LOOKUP_O_N: linear, O(N) | |
316 | */ | |
317 | enum nft_set_class { | |
318 | NFT_SET_CLASS_O_1, | |
319 | NFT_SET_CLASS_O_LOG_N, | |
320 | NFT_SET_CLASS_O_N, | |
321 | }; | |
322 | ||
323 | /** | |
324 | * struct nft_set_estimate - estimation of memory and performance | |
325 | * characteristics | |
326 | * | |
327 | * @size: required memory | |
55af753c | 328 | * @lookup: lookup performance class |
0b5a7874 | 329 | * @space: memory class |
c50b960c PM |
330 | */ |
331 | struct nft_set_estimate { | |
4ef360dd | 332 | u64 size; |
55af753c | 333 | enum nft_set_class lookup; |
0b5a7874 | 334 | enum nft_set_class space; |
c50b960c PM |
335 | }; |
336 | ||
92b211a2 PNA |
337 | #define NFT_EXPR_MAXATTR 16 |
338 | #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ | |
339 | ALIGN(size, __alignof__(struct nft_expr))) | |
340 | ||
341 | /** | |
342 | * struct nft_expr - nf_tables expression | |
343 | * | |
344 | * @ops: expression ops | |
345 | * @data: expression private data | |
346 | */ | |
347 | struct nft_expr { | |
348 | const struct nft_expr_ops *ops; | |
349 | unsigned char data[] | |
350 | __attribute__((aligned(__alignof__(u64)))); | |
351 | }; | |
352 | ||
353 | static inline void *nft_expr_priv(const struct nft_expr *expr) | |
354 | { | |
355 | return (void *)expr->data; | |
356 | } | |
357 | ||
358 | int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src); | |
359 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); | |
360 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, | |
361 | const struct nft_expr *expr); | |
be5650f8 PNA |
362 | bool nft_expr_reduce_bitwise(struct nft_regs_track *track, |
363 | const struct nft_expr *expr); | |
92b211a2 | 364 | |
b2832dd6 PM |
365 | struct nft_set_ext; |
366 | ||
20a69341 PM |
367 | /** |
368 | * struct nft_set_ops - nf_tables set operations | |
369 | * | |
370 | * @lookup: look up an element within the set | |
d0a8d877 AJ |
371 | * @update: update an element if exists, add it if doesn't exist |
372 | * @delete: delete an element | |
20a69341 | 373 | * @insert: insert new element into set |
cc02e457 | 374 | * @activate: activate new element in the next generation |
8411b644 | 375 | * @deactivate: lookup for element and deactivate it in the next generation |
1ba1c414 | 376 | * @flush: deactivate element in the next generation |
20a69341 | 377 | * @remove: remove element from set |
d0a8d877 | 378 | * @walk: iterate over all set elements |
ba0e4d99 | 379 | * @get: get set elements |
20a69341 PM |
380 | * @privsize: function to return size of set private data |
381 | * @init: initialize private data of new set instance | |
382 | * @destroy: destroy private data of set instance | |
fe2811eb | 383 | * @elemsize: element private size |
d0a8d877 AJ |
384 | * |
385 | * Operations lookup, update and delete have simpler interfaces, are faster | |
386 | * and currently only used in the packet path. All the rest are slower, | |
387 | * control plane functions. | |
20a69341 PM |
388 | */ |
389 | struct nft_set_ops { | |
42a55769 PNA |
390 | bool (*lookup)(const struct net *net, |
391 | const struct nft_set *set, | |
8cd8937a | 392 | const u32 *key, |
b2832dd6 | 393 | const struct nft_set_ext **ext); |
22fe54d5 | 394 | bool (*update)(struct nft_set *set, |
8cd8937a | 395 | const u32 *key, |
22fe54d5 PM |
396 | void *(*new)(struct nft_set *, |
397 | const struct nft_expr *, | |
a55e22e9 | 398 | struct nft_regs *), |
22fe54d5 | 399 | const struct nft_expr *expr, |
a55e22e9 | 400 | struct nft_regs *regs, |
22fe54d5 | 401 | const struct nft_set_ext **ext); |
d0a8d877 AJ |
402 | bool (*delete)(const struct nft_set *set, |
403 | const u32 *key); | |
22fe54d5 | 404 | |
42a55769 PNA |
405 | int (*insert)(const struct net *net, |
406 | const struct nft_set *set, | |
c016c7e4 PNA |
407 | const struct nft_set_elem *elem, |
408 | struct nft_set_ext **ext); | |
42a55769 PNA |
409 | void (*activate)(const struct net *net, |
410 | const struct nft_set *set, | |
cc02e457 | 411 | const struct nft_set_elem *elem); |
42a55769 PNA |
412 | void * (*deactivate)(const struct net *net, |
413 | const struct nft_set *set, | |
cc02e457 | 414 | const struct nft_set_elem *elem); |
1ba1c414 PNA |
415 | bool (*flush)(const struct net *net, |
416 | const struct nft_set *set, | |
417 | void *priv); | |
5cb82a38 PNA |
418 | void (*remove)(const struct net *net, |
419 | const struct nft_set *set, | |
20a69341 PM |
420 | const struct nft_set_elem *elem); |
421 | void (*walk)(const struct nft_ctx *ctx, | |
de70185d | 422 | struct nft_set *set, |
20a69341 | 423 | struct nft_set_iter *iter); |
ba0e4d99 PNA |
424 | void * (*get)(const struct net *net, |
425 | const struct nft_set *set, | |
426 | const struct nft_set_elem *elem, | |
427 | unsigned int flags); | |
20a69341 | 428 | |
4ef360dd | 429 | u64 (*privsize)(const struct nlattr * const nla[], |
347b408d | 430 | const struct nft_set_desc *desc); |
c50b960c PM |
431 | bool (*estimate)(const struct nft_set_desc *desc, |
432 | u32 features, | |
433 | struct nft_set_estimate *est); | |
20a69341 | 434 | int (*init)(const struct nft_set *set, |
c50b960c | 435 | const struct nft_set_desc *desc, |
20a69341 PM |
436 | const struct nlattr * const nla[]); |
437 | void (*destroy)(const struct nft_set *set); | |
79b174ad | 438 | void (*gc_init)(const struct nft_set *set); |
20a69341 | 439 | |
fe2811eb | 440 | unsigned int elemsize; |
71cc0873 PS |
441 | }; |
442 | ||
443 | /** | |
444 | * struct nft_set_type - nf_tables set type | |
445 | * | |
446 | * @ops: set ops for this type | |
71cc0873 PS |
447 | * @features: features supported by the implementation |
448 | */ | |
449 | struct nft_set_type { | |
450 | const struct nft_set_ops ops; | |
20a69341 PM |
451 | u32 features; |
452 | }; | |
71cc0873 | 453 | #define to_set_type(o) container_of(o, struct nft_set_type, ops) |
20a69341 | 454 | |
563125a7 PNA |
455 | struct nft_set_elem_expr { |
456 | u8 size; | |
457 | unsigned char data[] | |
458 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
459 | }; | |
460 | ||
461 | #define nft_setelem_expr_at(__elem_expr, __offset) \ | |
462 | ((struct nft_expr *)&__elem_expr->data[__offset]) | |
463 | ||
464 | #define nft_setelem_expr_foreach(__expr, __elem_expr, __size) \ | |
465 | for (__expr = nft_setelem_expr_at(__elem_expr, 0), __size = 0; \ | |
466 | __size < (__elem_expr)->size; \ | |
467 | __size += (__expr)->ops->size, __expr = ((void *)(__expr)) + (__expr)->ops->size) | |
468 | ||
8cfd9b0f PNA |
469 | #define NFT_SET_EXPR_MAX 2 |
470 | ||
20a69341 PM |
471 | /** |
472 | * struct nft_set - nf_tables set instance | |
473 | * | |
474 | * @list: table set list node | |
475 | * @bindings: list of set bindings | |
3453c927 PNA |
476 | * @table: table this set belongs to |
477 | * @net: netnamespace this set belongs to | |
20a69341 | 478 | * @name: name of the set |
3ecbfd65 | 479 | * @handle: unique handle of the set |
20a69341 PM |
480 | * @ktype: key type (numeric type defined by userspace, not used in the kernel) |
481 | * @dtype: data type (verdict or numeric type defined by userspace) | |
8aeff920 | 482 | * @objtype: object type (see NFT_OBJECT_* definitions) |
c50b960c | 483 | * @size: maximum set size |
f3a2181e SB |
484 | * @field_len: length of each field in concatenation, bytes |
485 | * @field_count: number of concatenated fields in element | |
273fe3f1 | 486 | * @use: number of rules references to this set |
c50b960c | 487 | * @nelems: number of elements |
3dd0673a | 488 | * @ndeact: number of deactivated elements queued for removal |
d3e2a111 | 489 | * @timeout: default timeout value in jiffies |
761da293 | 490 | * @gc_int: garbage collection interval in msecs |
9363dc4b | 491 | * @policy: set parameterization (see enum nft_set_policies) |
e6d8ecac CFG |
492 | * @udlen: user data length |
493 | * @udata: user data | |
65038428 | 494 | * @expr: stateful expression |
20a69341 PM |
495 | * @ops: set ops |
496 | * @flags: set flags | |
37a9cc52 | 497 | * @genmask: generation mask |
20a69341 PM |
498 | * @klen: key length |
499 | * @dlen: data length | |
500 | * @data: private set data | |
501 | */ | |
502 | struct nft_set { | |
503 | struct list_head list; | |
504 | struct list_head bindings; | |
3453c927 PNA |
505 | struct nft_table *table; |
506 | possible_net_t net; | |
38745490 | 507 | char *name; |
3ecbfd65 | 508 | u64 handle; |
20a69341 PM |
509 | u32 ktype; |
510 | u32 dtype; | |
8aeff920 | 511 | u32 objtype; |
c50b960c | 512 | u32 size; |
f3a2181e SB |
513 | u8 field_len[NFT_REG32_COUNT]; |
514 | u8 field_count; | |
273fe3f1 | 515 | u32 use; |
3dd0673a PM |
516 | atomic_t nelems; |
517 | u32 ndeact; | |
761da293 PM |
518 | u64 timeout; |
519 | u32 gc_int; | |
9363dc4b | 520 | u16 policy; |
e6d8ecac CFG |
521 | u16 udlen; |
522 | unsigned char *udata; | |
20a69341 PM |
523 | /* runtime data below here */ |
524 | const struct nft_set_ops *ops ____cacheline_aligned; | |
6a0a8d10 | 525 | u16 flags:14, |
37a9cc52 | 526 | genmask:2; |
20a69341 PM |
527 | u8 klen; |
528 | u8 dlen; | |
8cfd9b0f PNA |
529 | u8 num_exprs; |
530 | struct nft_expr *exprs[NFT_SET_EXPR_MAX]; | |
aaa31047 | 531 | struct list_head catchall_list; |
20a69341 PM |
532 | unsigned char data[] |
533 | __attribute__((aligned(__alignof__(u64)))); | |
534 | }; | |
535 | ||
408070d6 PNA |
536 | static inline bool nft_set_is_anonymous(const struct nft_set *set) |
537 | { | |
538 | return set->flags & NFT_SET_ANONYMOUS; | |
539 | } | |
540 | ||
20a69341 PM |
541 | static inline void *nft_set_priv(const struct nft_set *set) |
542 | { | |
543 | return (void *)set->data; | |
544 | } | |
545 | ||
9d098292 PM |
546 | static inline struct nft_set *nft_set_container_of(const void *priv) |
547 | { | |
548 | return (void *)priv - offsetof(struct nft_set, data); | |
549 | } | |
550 | ||
10659cba PNA |
551 | struct nft_set *nft_set_lookup_global(const struct net *net, |
552 | const struct nft_table *table, | |
553 | const struct nlattr *nla_set_name, | |
554 | const struct nlattr *nla_set_id, | |
555 | u8 genmask); | |
20a69341 | 556 | |
aaa31047 PNA |
557 | struct nft_set_ext *nft_set_catchall_lookup(const struct net *net, |
558 | const struct nft_set *set); | |
559 | void *nft_set_catchall_gc(const struct nft_set *set); | |
560 | ||
761da293 PM |
561 | static inline unsigned long nft_set_gc_interval(const struct nft_set *set) |
562 | { | |
563 | return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; | |
564 | } | |
565 | ||
20a69341 PM |
566 | /** |
567 | * struct nft_set_binding - nf_tables set binding | |
568 | * | |
569 | * @list: set bindings list node | |
570 | * @chain: chain containing the rule bound to the set | |
11113e19 | 571 | * @flags: set action flags |
20a69341 PM |
572 | * |
573 | * A set binding contains all information necessary for validation | |
574 | * of new elements added to a bound set. | |
575 | */ | |
576 | struct nft_set_binding { | |
577 | struct list_head list; | |
578 | const struct nft_chain *chain; | |
11113e19 | 579 | u32 flags; |
20a69341 PM |
580 | }; |
581 | ||
273fe3f1 PNA |
582 | enum nft_trans_phase; |
583 | void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, | |
584 | struct nft_set_binding *binding, | |
585 | enum nft_trans_phase phase); | |
5eccdfaa JP |
586 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
587 | struct nft_set_binding *binding); | |
cd5125d8 | 588 | void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); |
20a69341 | 589 | |
3ac4c07a PM |
590 | /** |
591 | * enum nft_set_extensions - set extension type IDs | |
592 | * | |
593 | * @NFT_SET_EXT_KEY: element key | |
7b225d0b | 594 | * @NFT_SET_EXT_KEY_END: upper bound element key, for ranges |
3ac4c07a PM |
595 | * @NFT_SET_EXT_DATA: mapping data |
596 | * @NFT_SET_EXT_FLAGS: element flags | |
c3e1b005 PM |
597 | * @NFT_SET_EXT_TIMEOUT: element timeout |
598 | * @NFT_SET_EXT_EXPIRATION: element expiration time | |
68e942e8 | 599 | * @NFT_SET_EXT_USERDATA: user data associated with the element |
563125a7 | 600 | * @NFT_SET_EXT_EXPRESSIONS: expressions assiciated with the element |
8aeff920 | 601 | * @NFT_SET_EXT_OBJREF: stateful object reference associated with element |
3ac4c07a PM |
602 | * @NFT_SET_EXT_NUM: number of extension types |
603 | */ | |
604 | enum nft_set_extensions { | |
605 | NFT_SET_EXT_KEY, | |
7b225d0b | 606 | NFT_SET_EXT_KEY_END, |
3ac4c07a PM |
607 | NFT_SET_EXT_DATA, |
608 | NFT_SET_EXT_FLAGS, | |
c3e1b005 PM |
609 | NFT_SET_EXT_TIMEOUT, |
610 | NFT_SET_EXT_EXPIRATION, | |
68e942e8 | 611 | NFT_SET_EXT_USERDATA, |
563125a7 | 612 | NFT_SET_EXT_EXPRESSIONS, |
8aeff920 | 613 | NFT_SET_EXT_OBJREF, |
3ac4c07a PM |
614 | NFT_SET_EXT_NUM |
615 | }; | |
616 | ||
617 | /** | |
618 | * struct nft_set_ext_type - set extension type | |
619 | * | |
620 | * @len: fixed part length of the extension | |
621 | * @align: alignment requirements of the extension | |
622 | */ | |
623 | struct nft_set_ext_type { | |
624 | u8 len; | |
625 | u8 align; | |
626 | }; | |
627 | ||
628 | extern const struct nft_set_ext_type nft_set_ext_types[]; | |
629 | ||
630 | /** | |
631 | * struct nft_set_ext_tmpl - set extension template | |
632 | * | |
633 | * @len: length of extension area | |
634 | * @offset: offsets of individual extension types | |
635 | */ | |
636 | struct nft_set_ext_tmpl { | |
637 | u16 len; | |
638 | u8 offset[NFT_SET_EXT_NUM]; | |
639 | }; | |
640 | ||
641 | /** | |
642 | * struct nft_set_ext - set extensions | |
643 | * | |
cc02e457 | 644 | * @genmask: generation mask |
3ac4c07a PM |
645 | * @offset: offsets of individual extension types |
646 | * @data: beginning of extension data | |
647 | */ | |
648 | struct nft_set_ext { | |
cc02e457 | 649 | u8 genmask; |
3ac4c07a | 650 | u8 offset[NFT_SET_EXT_NUM]; |
6daf1414 | 651 | char data[]; |
3ac4c07a PM |
652 | }; |
653 | ||
654 | static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) | |
655 | { | |
656 | memset(tmpl, 0, sizeof(*tmpl)); | |
657 | tmpl->len = sizeof(struct nft_set_ext); | |
658 | } | |
659 | ||
660 | static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, | |
661 | unsigned int len) | |
662 | { | |
663 | tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); | |
664 | BUG_ON(tmpl->len > U8_MAX); | |
665 | tmpl->offset[id] = tmpl->len; | |
666 | tmpl->len += nft_set_ext_types[id].len + len; | |
667 | } | |
668 | ||
669 | static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) | |
670 | { | |
671 | nft_set_ext_add_length(tmpl, id, 0); | |
672 | } | |
673 | ||
674 | static inline void nft_set_ext_init(struct nft_set_ext *ext, | |
675 | const struct nft_set_ext_tmpl *tmpl) | |
676 | { | |
677 | memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); | |
678 | } | |
679 | ||
680 | static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
681 | { | |
682 | return !!ext->offset[id]; | |
683 | } | |
684 | ||
685 | static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
686 | { | |
687 | return ext && __nft_set_ext_exists(ext, id); | |
688 | } | |
689 | ||
690 | static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) | |
691 | { | |
692 | return (void *)ext + ext->offset[id]; | |
693 | } | |
694 | ||
695 | static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) | |
696 | { | |
697 | return nft_set_ext(ext, NFT_SET_EXT_KEY); | |
698 | } | |
699 | ||
7b225d0b PNA |
700 | static inline struct nft_data *nft_set_ext_key_end(const struct nft_set_ext *ext) |
701 | { | |
702 | return nft_set_ext(ext, NFT_SET_EXT_KEY_END); | |
703 | } | |
704 | ||
3ac4c07a PM |
705 | static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) |
706 | { | |
707 | return nft_set_ext(ext, NFT_SET_EXT_DATA); | |
708 | } | |
709 | ||
710 | static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) | |
711 | { | |
712 | return nft_set_ext(ext, NFT_SET_EXT_FLAGS); | |
713 | } | |
ef1f7df9 | 714 | |
c3e1b005 PM |
715 | static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) |
716 | { | |
717 | return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); | |
718 | } | |
719 | ||
8e1102d5 | 720 | static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) |
c3e1b005 PM |
721 | { |
722 | return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); | |
723 | } | |
724 | ||
68e942e8 PM |
725 | static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) |
726 | { | |
727 | return nft_set_ext(ext, NFT_SET_EXT_USERDATA); | |
728 | } | |
729 | ||
563125a7 | 730 | static inline struct nft_set_elem_expr *nft_set_ext_expr(const struct nft_set_ext *ext) |
f25ad2e9 | 731 | { |
563125a7 | 732 | return nft_set_ext(ext, NFT_SET_EXT_EXPRESSIONS); |
f25ad2e9 PM |
733 | } |
734 | ||
c3e1b005 PM |
735 | static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) |
736 | { | |
737 | return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && | |
8e1102d5 | 738 | time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); |
c3e1b005 PM |
739 | } |
740 | ||
fe2811eb PM |
741 | static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, |
742 | void *elem) | |
743 | { | |
744 | return elem + set->ops->elemsize; | |
745 | } | |
746 | ||
8aeff920 PNA |
747 | static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) |
748 | { | |
749 | return nft_set_ext(ext, NFT_SET_EXT_OBJREF); | |
750 | } | |
751 | ||
a7fc9368 PNA |
752 | struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx, |
753 | const struct nft_set *set, | |
754 | const struct nlattr *attr); | |
755 | ||
22fe54d5 PM |
756 | void *nft_set_elem_init(const struct nft_set *set, |
757 | const struct nft_set_ext_tmpl *tmpl, | |
7b225d0b | 758 | const u32 *key, const u32 *key_end, const u32 *data, |
79ebb5bb | 759 | u64 timeout, u64 expiration, gfp_t gfp); |
fca05d4d PNA |
760 | int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set, |
761 | struct nft_expr *expr_array[]); | |
61f9e292 LZ |
762 | void nft_set_elem_destroy(const struct nft_set *set, void *elem, |
763 | bool destroy_expr); | |
61edafbb | 764 | |
cfed7e1b PM |
765 | /** |
766 | * struct nft_set_gc_batch_head - nf_tables set garbage collection batch | |
767 | * | |
768 | * @rcu: rcu head | |
769 | * @set: set the elements belong to | |
770 | * @cnt: count of elements | |
771 | */ | |
772 | struct nft_set_gc_batch_head { | |
773 | struct rcu_head rcu; | |
774 | const struct nft_set *set; | |
775 | unsigned int cnt; | |
776 | }; | |
777 | ||
778 | #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ | |
779 | sizeof(struct nft_set_gc_batch_head)) / \ | |
780 | sizeof(void *)) | |
781 | ||
782 | /** | |
783 | * struct nft_set_gc_batch - nf_tables set garbage collection batch | |
784 | * | |
785 | * @head: GC batch head | |
786 | * @elems: garbage collection elements | |
787 | */ | |
788 | struct nft_set_gc_batch { | |
789 | struct nft_set_gc_batch_head head; | |
790 | void *elems[NFT_SET_GC_BATCH_SIZE]; | |
791 | }; | |
792 | ||
793 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, | |
794 | gfp_t gfp); | |
795 | void nft_set_gc_batch_release(struct rcu_head *rcu); | |
796 | ||
797 | static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) | |
798 | { | |
799 | if (gcb != NULL) | |
800 | call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); | |
801 | } | |
802 | ||
803 | static inline struct nft_set_gc_batch * | |
804 | nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, | |
805 | gfp_t gfp) | |
806 | { | |
807 | if (gcb != NULL) { | |
808 | if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) | |
809 | return gcb; | |
810 | nft_set_gc_batch_complete(gcb); | |
811 | } | |
812 | return nft_set_gc_batch_alloc(set, gfp); | |
813 | } | |
814 | ||
815 | static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, | |
816 | void *elem) | |
817 | { | |
818 | gcb->elems[gcb->head.cnt++] = elem; | |
819 | } | |
820 | ||
b8e20400 | 821 | struct nft_expr_ops; |
96518518 | 822 | /** |
ef1f7df9 | 823 | * struct nft_expr_type - nf_tables expression type |
96518518 | 824 | * |
ef1f7df9 | 825 | * @select_ops: function to select nft_expr_ops |
b8e20400 | 826 | * @release_ops: release nft_expr_ops |
ef1f7df9 | 827 | * @ops: default ops, used when no select_ops functions is present |
96518518 PM |
828 | * @list: used internally |
829 | * @name: Identifier | |
830 | * @owner: module reference | |
831 | * @policy: netlink attribute policy | |
832 | * @maxattr: highest netlink attribute number | |
64d46806 | 833 | * @family: address family for AF-specific types |
151d799a | 834 | * @flags: expression type flags |
ef1f7df9 PM |
835 | */ |
836 | struct nft_expr_type { | |
0ca743a5 PNA |
837 | const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
838 | const struct nlattr * const tb[]); | |
b8e20400 | 839 | void (*release_ops)(const struct nft_expr_ops *ops); |
ef1f7df9 PM |
840 | const struct nft_expr_ops *ops; |
841 | struct list_head list; | |
842 | const char *name; | |
843 | struct module *owner; | |
844 | const struct nla_policy *policy; | |
845 | unsigned int maxattr; | |
64d46806 | 846 | u8 family; |
151d799a | 847 | u8 flags; |
ef1f7df9 PM |
848 | }; |
849 | ||
151d799a | 850 | #define NFT_EXPR_STATEFUL 0x1 |
79b174ad | 851 | #define NFT_EXPR_GC 0x2 |
151d799a | 852 | |
f6ac8585 PNA |
853 | enum nft_trans_phase { |
854 | NFT_TRANS_PREPARE, | |
855 | NFT_TRANS_ABORT, | |
856 | NFT_TRANS_COMMIT, | |
857 | NFT_TRANS_RELEASE | |
858 | }; | |
859 | ||
c9626a2c PNA |
860 | struct nft_flow_rule; |
861 | struct nft_offload_ctx; | |
862 | ||
ef1f7df9 PM |
863 | /** |
864 | * struct nft_expr_ops - nf_tables expression operations | |
865 | * | |
866 | * @eval: Expression evaluation function | |
96518518 | 867 | * @size: full expression size, including private data size |
ef1f7df9 | 868 | * @init: initialization function |
cd5125d8 FW |
869 | * @activate: activate expression in the next generation |
870 | * @deactivate: deactivate expression in next generation | |
871 | * @destroy: destruction function, called after synchronize_rcu | |
ef1f7df9 PM |
872 | * @dump: function to dump parameters |
873 | * @type: expression type | |
0ca743a5 PNA |
874 | * @validate: validate expression, called during loop detection |
875 | * @data: extra data to attach to this expression operation | |
96518518 | 876 | */ |
96518518 PM |
877 | struct nft_expr_ops { |
878 | void (*eval)(const struct nft_expr *expr, | |
a55e22e9 | 879 | struct nft_regs *regs, |
96518518 | 880 | const struct nft_pktinfo *pkt); |
086f3321 PNA |
881 | int (*clone)(struct nft_expr *dst, |
882 | const struct nft_expr *src); | |
ef1f7df9 PM |
883 | unsigned int size; |
884 | ||
96518518 PM |
885 | int (*init)(const struct nft_ctx *ctx, |
886 | const struct nft_expr *expr, | |
887 | const struct nlattr * const tb[]); | |
bb7b40ae PNA |
888 | void (*activate)(const struct nft_ctx *ctx, |
889 | const struct nft_expr *expr); | |
890 | void (*deactivate)(const struct nft_ctx *ctx, | |
f6ac8585 PNA |
891 | const struct nft_expr *expr, |
892 | enum nft_trans_phase phase); | |
62472bce PM |
893 | void (*destroy)(const struct nft_ctx *ctx, |
894 | const struct nft_expr *expr); | |
371ebcbb PNA |
895 | void (*destroy_clone)(const struct nft_ctx *ctx, |
896 | const struct nft_expr *expr); | |
96518518 PM |
897 | int (*dump)(struct sk_buff *skb, |
898 | const struct nft_expr *expr); | |
0ca743a5 PNA |
899 | int (*validate)(const struct nft_ctx *ctx, |
900 | const struct nft_expr *expr, | |
901 | const struct nft_data **data); | |
12e4ecfa PNA |
902 | bool (*reduce)(struct nft_regs_track *track, |
903 | const struct nft_expr *expr); | |
79b174ad PNA |
904 | bool (*gc)(struct net *net, |
905 | const struct nft_expr *expr); | |
c9626a2c PNA |
906 | int (*offload)(struct nft_offload_ctx *ctx, |
907 | struct nft_flow_rule *flow, | |
908 | const struct nft_expr *expr); | |
b1a5983f | 909 | bool (*offload_action)(const struct nft_expr *expr); |
b72920f6 PNA |
910 | void (*offload_stats)(struct nft_expr *expr, |
911 | const struct flow_stats *stats); | |
ef1f7df9 | 912 | const struct nft_expr_type *type; |
0ca743a5 | 913 | void *data; |
96518518 PM |
914 | }; |
915 | ||
96518518 PM |
916 | /** |
917 | * struct nft_rule - nf_tables rule | |
918 | * | |
919 | * @list: used internally | |
96518518 | 920 | * @handle: rule handle |
0628b123 | 921 | * @genmask: generation mask |
96518518 | 922 | * @dlen: length of expression data |
86f1ec32 | 923 | * @udata: user data is appended to the rule |
96518518 PM |
924 | * @data: expression data |
925 | */ | |
926 | struct nft_rule { | |
927 | struct list_head list; | |
0768b3b3 | 928 | u64 handle:42, |
0628b123 | 929 | genmask:2, |
0768b3b3 | 930 | dlen:12, |
86f1ec32 | 931 | udata:1; |
96518518 PM |
932 | unsigned char data[] |
933 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
934 | }; | |
935 | ||
936 | static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) | |
937 | { | |
938 | return (struct nft_expr *)&rule->data[0]; | |
939 | } | |
940 | ||
941 | static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) | |
942 | { | |
943 | return ((void *)expr) + expr->ops->size; | |
944 | } | |
945 | ||
946 | static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) | |
947 | { | |
948 | return (struct nft_expr *)&rule->data[rule->dlen]; | |
949 | } | |
950 | ||
31cc578a SM |
951 | static inline bool nft_expr_more(const struct nft_rule *rule, |
952 | const struct nft_expr *expr) | |
953 | { | |
954 | return expr != nft_expr_last(rule) && expr->ops; | |
955 | } | |
956 | ||
86f1ec32 | 957 | static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
0768b3b3 PNA |
958 | { |
959 | return (void *)&rule->data[rule->dlen]; | |
960 | } | |
961 | ||
d0e2c7de PNA |
962 | void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule); |
963 | ||
76adfafe PNA |
964 | static inline void nft_set_elem_update_expr(const struct nft_set_ext *ext, |
965 | struct nft_regs *regs, | |
966 | const struct nft_pktinfo *pkt) | |
967 | { | |
563125a7 | 968 | struct nft_set_elem_expr *elem_expr; |
76adfafe | 969 | struct nft_expr *expr; |
563125a7 PNA |
970 | u32 size; |
971 | ||
972 | if (__nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS)) { | |
973 | elem_expr = nft_set_ext_expr(ext); | |
974 | nft_setelem_expr_foreach(expr, elem_expr, size) { | |
975 | expr->ops->eval(expr, regs, pkt); | |
976 | if (regs->verdict.code == NFT_BREAK) | |
977 | return; | |
978 | } | |
76adfafe PNA |
979 | } |
980 | } | |
981 | ||
96518518 PM |
982 | /* |
983 | * The last pointer isn't really necessary, but the compiler isn't able to | |
984 | * determine that the result of nft_expr_last() is always the same since it | |
985 | * can't assume that the dlen value wasn't changed within calls in the loop. | |
986 | */ | |
987 | #define nft_rule_for_each_expr(expr, last, rule) \ | |
988 | for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ | |
989 | (expr) != (last); \ | |
990 | (expr) = nft_expr_next(expr)) | |
991 | ||
ad652f38 PNA |
992 | #define NFT_CHAIN_POLICY_UNSET U8_MAX |
993 | ||
2c865a8a PNA |
994 | struct nft_rule_dp { |
995 | u64 is_last:1, | |
996 | dlen:12, | |
997 | handle:42; /* for tracing */ | |
998 | unsigned char data[] | |
999 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
1000 | }; | |
1001 | ||
1002 | struct nft_rule_blob { | |
1003 | unsigned long size; | |
1004 | unsigned char data[] | |
1005 | __attribute__((aligned(__alignof__(struct nft_rule_dp)))); | |
1006 | }; | |
1007 | ||
96518518 PM |
1008 | /** |
1009 | * struct nft_chain - nf_tables chain | |
1010 | * | |
1011 | * @rules: list of rules in the chain | |
1012 | * @list: used internally | |
1b2470e5 | 1013 | * @rhlhead: used internally |
b5bc89bf | 1014 | * @table: table that this chain belongs to |
96518518 | 1015 | * @handle: chain handle |
96518518 | 1016 | * @use: number of jump references to this chain |
a0a7379e | 1017 | * @flags: bitmask of enum nft_chain_flags |
96518518 PM |
1018 | * @name: name of the chain |
1019 | */ | |
1020 | struct nft_chain { | |
2c865a8a PNA |
1021 | struct nft_rule_blob __rcu *blob_gen_0; |
1022 | struct nft_rule_blob __rcu *blob_gen_1; | |
96518518 PM |
1023 | struct list_head rules; |
1024 | struct list_head list; | |
1b2470e5 | 1025 | struct rhlist_head rhlhead; |
b5bc89bf | 1026 | struct nft_table *table; |
96518518 | 1027 | u64 handle; |
a0a7379e | 1028 | u32 use; |
d0e2c7de PNA |
1029 | u8 flags:5, |
1030 | bound:1, | |
664b0f8c | 1031 | genmask:2; |
b7263e07 | 1032 | char *name; |
002f2176 JGG |
1033 | u16 udlen; |
1034 | u8 *udata; | |
0cbc06b3 FW |
1035 | |
1036 | /* Only used during control plane commit phase: */ | |
2c865a8a | 1037 | struct nft_rule_blob *blob_next; |
96518518 PM |
1038 | }; |
1039 | ||
a654de8f PNA |
1040 | int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); |
1041 | ||
32537e91 | 1042 | enum nft_chain_types { |
9370761c PNA |
1043 | NFT_CHAIN_T_DEFAULT = 0, |
1044 | NFT_CHAIN_T_ROUTE, | |
1045 | NFT_CHAIN_T_NAT, | |
1046 | NFT_CHAIN_T_MAX | |
1047 | }; | |
1048 | ||
1a1e1a12 | 1049 | /** |
32537e91 | 1050 | * struct nft_chain_type - nf_tables chain type info |
1a1e1a12 PM |
1051 | * |
1052 | * @name: name of the type | |
1053 | * @type: numeric identifier | |
1054 | * @family: address family | |
1055 | * @owner: module owner | |
1056 | * @hook_mask: mask of valid hooks | |
c2f9eafe | 1057 | * @hooks: array of hook functions |
4e25ceb8 FW |
1058 | * @ops_register: base chain register function |
1059 | * @ops_unregister: base chain unregister function | |
1a1e1a12 | 1060 | */ |
32537e91 | 1061 | struct nft_chain_type { |
1a1e1a12 | 1062 | const char *name; |
32537e91 | 1063 | enum nft_chain_types type; |
1a1e1a12 PM |
1064 | int family; |
1065 | struct module *owner; | |
1066 | unsigned int hook_mask; | |
d25e2e93 | 1067 | nf_hookfn *hooks[NFT_MAX_HOOKS]; |
4e25ceb8 FW |
1068 | int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); |
1069 | void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); | |
1a1e1a12 PM |
1070 | }; |
1071 | ||
7210e4e3 | 1072 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
32537e91 | 1073 | enum nft_chain_types type); |
75e8d06d PNA |
1074 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
1075 | unsigned int hook_flags); | |
7210e4e3 | 1076 | |
d0e2c7de PNA |
1077 | static inline bool nft_chain_is_bound(struct nft_chain *chain) |
1078 | { | |
1079 | return (chain->flags & NFT_CHAIN_BINDING) && chain->bound; | |
1080 | } | |
1081 | ||
1082 | void nft_chain_del(struct nft_chain *chain); | |
1083 | void nf_tables_chain_destroy(struct nft_ctx *ctx); | |
1084 | ||
0ca743a5 | 1085 | struct nft_stats { |
ce355e20 ED |
1086 | u64 bytes; |
1087 | u64 pkts; | |
1088 | struct u64_stats_sync syncp; | |
0ca743a5 PNA |
1089 | }; |
1090 | ||
3f0465a9 PNA |
1091 | struct nft_hook { |
1092 | struct list_head list; | |
abadb2f8 | 1093 | bool inactive; |
3f0465a9 PNA |
1094 | struct nf_hook_ops ops; |
1095 | struct rcu_head rcu; | |
1096 | }; | |
1097 | ||
96518518 PM |
1098 | /** |
1099 | * struct nft_base_chain - nf_tables base chain | |
1100 | * | |
1101 | * @ops: netfilter hook ops | |
d54725cd | 1102 | * @hook_list: list of netfilter hooks (for NFPROTO_NETDEV family) |
9370761c | 1103 | * @type: chain type |
0ca743a5 PNA |
1104 | * @policy: default policy |
1105 | * @stats: per-cpu chain stats | |
96518518 | 1106 | * @chain: the chain |
14bfb13f | 1107 | * @flow_block: flow block (for hardware offload) |
96518518 PM |
1108 | */ |
1109 | struct nft_base_chain { | |
c974a3a3 | 1110 | struct nf_hook_ops ops; |
d54725cd | 1111 | struct list_head hook_list; |
32537e91 | 1112 | const struct nft_chain_type *type; |
0ca743a5 | 1113 | u8 policy; |
835b8033 | 1114 | u8 flags; |
0ca743a5 | 1115 | struct nft_stats __percpu *stats; |
96518518 | 1116 | struct nft_chain chain; |
14bfb13f | 1117 | struct flow_block flow_block; |
96518518 PM |
1118 | }; |
1119 | ||
1120 | static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) | |
1121 | { | |
1122 | return container_of(chain, struct nft_base_chain, chain); | |
1123 | } | |
1124 | ||
f323d954 PNA |
1125 | static inline bool nft_is_base_chain(const struct nft_chain *chain) |
1126 | { | |
67c49de4 | 1127 | return chain->flags & NFT_CHAIN_BASE; |
f323d954 PNA |
1128 | } |
1129 | ||
5ebe0b0e | 1130 | int __nft_release_basechain(struct nft_ctx *ctx); |
835b8033 | 1131 | |
06198b34 | 1132 | unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); |
96518518 | 1133 | |
96518518 PM |
1134 | /** |
1135 | * struct nft_table - nf_tables table | |
1136 | * | |
1137 | * @list: used internally | |
1b2470e5 FW |
1138 | * @chains_ht: chains in the table |
1139 | * @chains: same, for stable walks | |
96518518 | 1140 | * @sets: sets in the table |
e5009240 | 1141 | * @objects: stateful objects in the table |
3b49e2e9 | 1142 | * @flowtables: flow tables in the table |
96518518 | 1143 | * @hgenerator: handle generator state |
3ecbfd65 | 1144 | * @handle: table handle |
96518518 PM |
1145 | * @use: number of chain references to this table |
1146 | * @flags: table flag (see enum nft_table_flags) | |
f2a6d766 | 1147 | * @genmask: generation mask |
36596dad | 1148 | * @afinfo: address family info |
96518518 PM |
1149 | * @name: name of the table |
1150 | */ | |
1151 | struct nft_table { | |
1152 | struct list_head list; | |
1b2470e5 | 1153 | struct rhltable chains_ht; |
96518518 PM |
1154 | struct list_head chains; |
1155 | struct list_head sets; | |
e5009240 | 1156 | struct list_head objects; |
3b49e2e9 | 1157 | struct list_head flowtables; |
96518518 | 1158 | u64 hgenerator; |
3ecbfd65 | 1159 | u64 handle; |
96518518 | 1160 | u32 use; |
98319cb9 PNA |
1161 | u16 family:6, |
1162 | flags:8, | |
f2a6d766 | 1163 | genmask:2; |
6001a930 | 1164 | u32 nlpid; |
e46abbcc | 1165 | char *name; |
7a81575b JGG |
1166 | u16 udlen; |
1167 | u8 *udata; | |
ebddf1a8 PNA |
1168 | }; |
1169 | ||
6001a930 PNA |
1170 | static inline bool nft_table_has_owner(const struct nft_table *table) |
1171 | { | |
1172 | return table->flags & NFT_TABLE_F_OWNER; | |
1173 | } | |
1174 | ||
d3519cb8 PNA |
1175 | static inline bool nft_base_chain_netdev(int family, u32 hooknum) |
1176 | { | |
1177 | return family == NFPROTO_NETDEV || | |
1178 | (family == NFPROTO_INET && hooknum == NF_INET_INGRESS); | |
1179 | } | |
1180 | ||
cc07eeb0 | 1181 | void nft_register_chain_type(const struct nft_chain_type *); |
32537e91 | 1182 | void nft_unregister_chain_type(const struct nft_chain_type *); |
96518518 | 1183 | |
5eccdfaa JP |
1184 | int nft_register_expr(struct nft_expr_type *); |
1185 | void nft_unregister_expr(struct nft_expr_type *); | |
96518518 | 1186 | |
33d5a7b1 FW |
1187 | int nft_verdict_dump(struct sk_buff *skb, int type, |
1188 | const struct nft_verdict *v); | |
1189 | ||
d152159b FW |
1190 | /** |
1191 | * struct nft_object_hash_key - key to lookup nft_object | |
1192 | * | |
1193 | * @name: name of the stateful object to look up | |
1194 | * @table: table the object belongs to | |
1195 | */ | |
1196 | struct nft_object_hash_key { | |
1197 | const char *name; | |
1198 | const struct nft_table *table; | |
1199 | }; | |
1200 | ||
e5009240 PNA |
1201 | /** |
1202 | * struct nft_object - nf_tables stateful object | |
1203 | * | |
1204 | * @list: table stateful object list node | |
d152159b | 1205 | * @key: keys that identify this object |
4d44175a | 1206 | * @rhlhead: nft_objname_ht node |
e5009240 PNA |
1207 | * @genmask: generation mask |
1208 | * @use: number of references to this stateful object | |
3ecbfd65 | 1209 | * @handle: unique object handle |
dfc46034 | 1210 | * @ops: object operations |
4d44175a | 1211 | * @data: object data, layout depends on type |
e5009240 PNA |
1212 | */ |
1213 | struct nft_object { | |
1214 | struct list_head list; | |
4d44175a | 1215 | struct rhlist_head rhlhead; |
d152159b | 1216 | struct nft_object_hash_key key; |
e5009240 PNA |
1217 | u32 genmask:2, |
1218 | use:30; | |
3ecbfd65 | 1219 | u64 handle; |
b131c964 JGG |
1220 | u16 udlen; |
1221 | u8 *udata; | |
e5009240 | 1222 | /* runtime data below here */ |
dfc46034 | 1223 | const struct nft_object_ops *ops ____cacheline_aligned; |
e5009240 PNA |
1224 | unsigned char data[] |
1225 | __attribute__((aligned(__alignof__(u64)))); | |
1226 | }; | |
1227 | ||
1228 | static inline void *nft_obj_data(const struct nft_object *obj) | |
1229 | { | |
1230 | return (void *)obj->data; | |
1231 | } | |
1232 | ||
1233 | #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) | |
1234 | ||
4d44175a FW |
1235 | struct nft_object *nft_obj_lookup(const struct net *net, |
1236 | const struct nft_table *table, | |
cac20fcd PNA |
1237 | const struct nlattr *nla, u32 objtype, |
1238 | u8 genmask); | |
e5009240 | 1239 | |
d152159b | 1240 | void nft_obj_notify(struct net *net, const struct nft_table *table, |
25e94a99 | 1241 | struct nft_object *obj, u32 portid, u32 seq, |
6fb721cf | 1242 | int event, u16 flags, int family, int report, gfp_t gfp); |
2599e989 | 1243 | |
e5009240 PNA |
1244 | /** |
1245 | * struct nft_object_type - stateful object type | |
1246 | * | |
dfc46034 PBG |
1247 | * @select_ops: function to select nft_object_ops |
1248 | * @ops: default ops, used when no select_ops functions is present | |
e5009240 PNA |
1249 | * @list: list node in list of object types |
1250 | * @type: stateful object numeric type | |
e5009240 PNA |
1251 | * @owner: module owner |
1252 | * @maxattr: maximum netlink attribute | |
1253 | * @policy: netlink attribute policy | |
dfc46034 PBG |
1254 | */ |
1255 | struct nft_object_type { | |
1256 | const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, | |
1257 | const struct nlattr * const tb[]); | |
1258 | const struct nft_object_ops *ops; | |
1259 | struct list_head list; | |
1260 | u32 type; | |
1261 | unsigned int maxattr; | |
1262 | struct module *owner; | |
1263 | const struct nla_policy *policy; | |
1264 | }; | |
1265 | ||
1266 | /** | |
1267 | * struct nft_object_ops - stateful object operations | |
1268 | * | |
1269 | * @eval: stateful object evaluation function | |
1270 | * @size: stateful object size | |
e5009240 PNA |
1271 | * @init: initialize object from netlink attributes |
1272 | * @destroy: release existing stateful object | |
1273 | * @dump: netlink dump stateful object | |
d62d0ba9 | 1274 | * @update: update stateful object |
e5009240 | 1275 | */ |
dfc46034 | 1276 | struct nft_object_ops { |
e5009240 PNA |
1277 | void (*eval)(struct nft_object *obj, |
1278 | struct nft_regs *regs, | |
1279 | const struct nft_pktinfo *pkt); | |
e5009240 | 1280 | unsigned int size; |
84fba055 FW |
1281 | int (*init)(const struct nft_ctx *ctx, |
1282 | const struct nlattr *const tb[], | |
e5009240 | 1283 | struct nft_object *obj); |
00bfb320 PNA |
1284 | void (*destroy)(const struct nft_ctx *ctx, |
1285 | struct nft_object *obj); | |
e5009240 | 1286 | int (*dump)(struct sk_buff *skb, |
43da04a5 PNA |
1287 | struct nft_object *obj, |
1288 | bool reset); | |
d62d0ba9 FFM |
1289 | void (*update)(struct nft_object *obj, |
1290 | struct nft_object *newobj); | |
dfc46034 | 1291 | const struct nft_object_type *type; |
e5009240 PNA |
1292 | }; |
1293 | ||
1294 | int nft_register_obj(struct nft_object_type *obj_type); | |
1295 | void nft_unregister_obj(struct nft_object_type *obj_type); | |
1296 | ||
cb662ac6 | 1297 | #define NFT_NETDEVICE_MAX 256 |
d92191aa | 1298 | |
3b49e2e9 PNA |
1299 | /** |
1300 | * struct nft_flowtable - nf_tables flow table | |
1301 | * | |
1302 | * @list: flow table list node in table list | |
1303 | * @table: the table the flow table is contained in | |
1304 | * @name: name of this flow table | |
1305 | * @hooknum: hook number | |
3b49e2e9 PNA |
1306 | * @ops_len: number of hooks in array |
1307 | * @genmask: generation mask | |
1308 | * @use: number of references to this flow table | |
3ecbfd65 | 1309 | * @handle: unique object handle |
d92191aa | 1310 | * @dev_name: array of device names |
3b49e2e9 PNA |
1311 | * @data: rhashtable and garbage collector |
1312 | * @ops: array of hooks | |
1313 | */ | |
1314 | struct nft_flowtable { | |
1315 | struct list_head list; | |
1316 | struct nft_table *table; | |
1317 | char *name; | |
1318 | int hooknum; | |
3b49e2e9 PNA |
1319 | int ops_len; |
1320 | u32 genmask:2, | |
1321 | use:30; | |
3ecbfd65 | 1322 | u64 handle; |
3b49e2e9 | 1323 | /* runtime data below here */ |
3f0465a9 | 1324 | struct list_head hook_list ____cacheline_aligned; |
3b49e2e9 PNA |
1325 | struct nf_flowtable data; |
1326 | }; | |
1327 | ||
cac20fcd PNA |
1328 | struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, |
1329 | const struct nlattr *nla, | |
1330 | u8 genmask); | |
3b49e2e9 | 1331 | |
9b05b6e1 LGL |
1332 | void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx, |
1333 | struct nft_flowtable *flowtable, | |
1334 | enum nft_trans_phase phase); | |
1335 | ||
3b49e2e9 PNA |
1336 | void nft_register_flowtable_type(struct nf_flowtable_type *type); |
1337 | void nft_unregister_flowtable_type(struct nf_flowtable_type *type); | |
1338 | ||
33d5a7b1 FW |
1339 | /** |
1340 | * struct nft_traceinfo - nft tracing information and state | |
1341 | * | |
1342 | * @pkt: pktinfo currently processed | |
1343 | * @basechain: base chain currently processed | |
1344 | * @chain: chain currently processed | |
1345 | * @rule: rule that was evaluated | |
1346 | * @verdict: verdict given by rule | |
1347 | * @type: event type (enum nft_trace_types) | |
1348 | * @packet_dumped: packet headers sent in a previous traceinfo message | |
1349 | * @trace: other struct members are initialised | |
1350 | */ | |
1351 | struct nft_traceinfo { | |
1352 | const struct nft_pktinfo *pkt; | |
1353 | const struct nft_base_chain *basechain; | |
1354 | const struct nft_chain *chain; | |
2c865a8a | 1355 | const struct nft_rule_dp *rule; |
33d5a7b1 FW |
1356 | const struct nft_verdict *verdict; |
1357 | enum nft_trace_types type; | |
1358 | bool packet_dumped; | |
1359 | bool trace; | |
1360 | }; | |
1361 | ||
1362 | void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, | |
1363 | const struct nft_verdict *verdict, | |
1364 | const struct nft_chain *basechain); | |
1365 | ||
1366 | void nft_trace_notify(struct nft_traceinfo *info); | |
1367 | ||
9370761c PNA |
1368 | #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
1369 | MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) | |
96518518 | 1370 | |
64d46806 PM |
1371 | #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
1372 | MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) | |
1373 | ||
96518518 PM |
1374 | #define MODULE_ALIAS_NFT_EXPR(name) \ |
1375 | MODULE_ALIAS("nft-expr-" name) | |
1376 | ||
e5009240 PNA |
1377 | #define MODULE_ALIAS_NFT_OBJ(type) \ |
1378 | MODULE_ALIAS("nft-obj-" __stringify(type)) | |
1379 | ||
47e640af JS |
1380 | #if IS_ENABLED(CONFIG_NF_TABLES) |
1381 | ||
ea4bd995 PM |
1382 | /* |
1383 | * The gencursor defines two generations, the currently active and the | |
1384 | * next one. Objects contain a bitmask of 2 bits specifying the generations | |
1385 | * they're active in. A set bit means they're inactive in the generation | |
1386 | * represented by that bit. | |
1387 | * | |
1388 | * New objects start out as inactive in the current and active in the | |
1389 | * next generation. When committing the ruleset the bitmask is cleared, | |
1390 | * meaning they're active in all generations. When removing an object, | |
1391 | * it is set inactive in the next generation. After committing the ruleset, | |
1392 | * the objects are removed. | |
1393 | */ | |
1394 | static inline unsigned int nft_gencursor_next(const struct net *net) | |
1395 | { | |
1396 | return net->nft.gencursor + 1 == 1 ? 1 : 0; | |
1397 | } | |
1398 | ||
1399 | static inline u8 nft_genmask_next(const struct net *net) | |
1400 | { | |
1401 | return 1 << nft_gencursor_next(net); | |
1402 | } | |
1403 | ||
1404 | static inline u8 nft_genmask_cur(const struct net *net) | |
1405 | { | |
14cd5d4a MR |
1406 | /* Use READ_ONCE() to prevent refetching the value for atomicity */ |
1407 | return 1 << READ_ONCE(net->nft.gencursor); | |
ea4bd995 PM |
1408 | } |
1409 | ||
22fe54d5 PM |
1410 | #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) |
1411 | ||
889f7ee7 PNA |
1412 | /* |
1413 | * Generic transaction helpers | |
1414 | */ | |
1415 | ||
1416 | /* Check if this object is currently active. */ | |
1417 | #define nft_is_active(__net, __obj) \ | |
1418 | (((__obj)->genmask & nft_genmask_cur(__net)) == 0) | |
1419 | ||
1420 | /* Check if this object is active in the next generation. */ | |
1421 | #define nft_is_active_next(__net, __obj) \ | |
1422 | (((__obj)->genmask & nft_genmask_next(__net)) == 0) | |
1423 | ||
1424 | /* This object becomes active in the next generation. */ | |
1425 | #define nft_activate_next(__net, __obj) \ | |
1426 | (__obj)->genmask = nft_genmask_cur(__net) | |
1427 | ||
1428 | /* This object becomes inactive in the next generation. */ | |
1429 | #define nft_deactivate_next(__net, __obj) \ | |
1430 | (__obj)->genmask = nft_genmask_next(__net) | |
1431 | ||
1432 | /* After committing the ruleset, clear the stale generation bit. */ | |
1433 | #define nft_clear(__net, __obj) \ | |
1434 | (__obj)->genmask &= ~nft_genmask_next(__net) | |
f2a6d766 PNA |
1435 | #define nft_active_genmask(__obj, __genmask) \ |
1436 | !((__obj)->genmask & __genmask) | |
889f7ee7 | 1437 | |
cc02e457 PM |
1438 | /* |
1439 | * Set element transaction helpers | |
1440 | */ | |
1441 | ||
1442 | static inline bool nft_set_elem_active(const struct nft_set_ext *ext, | |
1443 | u8 genmask) | |
1444 | { | |
1445 | return !(ext->genmask & genmask); | |
1446 | } | |
1447 | ||
42a55769 PNA |
1448 | static inline void nft_set_elem_change_active(const struct net *net, |
1449 | const struct nft_set *set, | |
cc02e457 PM |
1450 | struct nft_set_ext *ext) |
1451 | { | |
42a55769 | 1452 | ext->genmask ^= nft_genmask_next(net); |
cc02e457 PM |
1453 | } |
1454 | ||
47e640af JS |
1455 | #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ |
1456 | ||
69086658 PM |
1457 | /* |
1458 | * We use a free bit in the genmask field to indicate the element | |
1459 | * is busy, meaning it is currently being processed either by | |
1460 | * the netlink API or GC. | |
1461 | * | |
1462 | * Even though the genmask is only a single byte wide, this works | |
1463 | * because the extension structure if fully constant once initialized, | |
1464 | * so there are no non-atomic write accesses unless it is already | |
1465 | * marked busy. | |
1466 | */ | |
1467 | #define NFT_SET_ELEM_BUSY_MASK (1 << 2) | |
1468 | ||
1469 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
1470 | #define NFT_SET_ELEM_BUSY_BIT 2 | |
1471 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
1472 | #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) | |
1473 | #else | |
1474 | #error | |
1475 | #endif | |
1476 | ||
1477 | static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) | |
1478 | { | |
1479 | unsigned long *word = (unsigned long *)ext; | |
1480 | ||
1481 | BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); | |
1482 | return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1483 | } | |
1484 | ||
1485 | static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) | |
1486 | { | |
1487 | unsigned long *word = (unsigned long *)ext; | |
1488 | ||
1489 | clear_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1490 | } | |
1491 | ||
1a1e1a12 PM |
1492 | /** |
1493 | * struct nft_trans - nf_tables object update in transaction | |
1494 | * | |
1495 | * @list: used internally | |
1496 | * @msg_type: message type | |
0935d558 | 1497 | * @put_net: ctx->net needs to be put |
1a1e1a12 PM |
1498 | * @ctx: transaction context |
1499 | * @data: internal information related to the transaction | |
1500 | */ | |
1501 | struct nft_trans { | |
1502 | struct list_head list; | |
1503 | int msg_type; | |
0935d558 | 1504 | bool put_net; |
1a1e1a12 | 1505 | struct nft_ctx ctx; |
6daf1414 | 1506 | char data[]; |
1a1e1a12 PM |
1507 | }; |
1508 | ||
1509 | struct nft_trans_rule { | |
1510 | struct nft_rule *rule; | |
c9626a2c | 1511 | struct nft_flow_rule *flow; |
1a94e38d | 1512 | u32 rule_id; |
1a1e1a12 PM |
1513 | }; |
1514 | ||
1515 | #define nft_trans_rule(trans) \ | |
1516 | (((struct nft_trans_rule *)trans->data)->rule) | |
c9626a2c PNA |
1517 | #define nft_trans_flow_rule(trans) \ |
1518 | (((struct nft_trans_rule *)trans->data)->flow) | |
1a94e38d PNA |
1519 | #define nft_trans_rule_id(trans) \ |
1520 | (((struct nft_trans_rule *)trans->data)->rule_id) | |
1a1e1a12 PM |
1521 | |
1522 | struct nft_trans_set { | |
1523 | struct nft_set *set; | |
1524 | u32 set_id; | |
6a0a8d10 | 1525 | bool bound; |
1a1e1a12 PM |
1526 | }; |
1527 | ||
1528 | #define nft_trans_set(trans) \ | |
1529 | (((struct nft_trans_set *)trans->data)->set) | |
1530 | #define nft_trans_set_id(trans) \ | |
1531 | (((struct nft_trans_set *)trans->data)->set_id) | |
6a0a8d10 PNA |
1532 | #define nft_trans_set_bound(trans) \ |
1533 | (((struct nft_trans_set *)trans->data)->bound) | |
1a1e1a12 PM |
1534 | |
1535 | struct nft_trans_chain { | |
1536 | bool update; | |
b7263e07 | 1537 | char *name; |
1a1e1a12 PM |
1538 | struct nft_stats __percpu *stats; |
1539 | u8 policy; | |
74cccc3d | 1540 | u32 chain_id; |
1a1e1a12 PM |
1541 | }; |
1542 | ||
1543 | #define nft_trans_chain_update(trans) \ | |
1544 | (((struct nft_trans_chain *)trans->data)->update) | |
1545 | #define nft_trans_chain_name(trans) \ | |
1546 | (((struct nft_trans_chain *)trans->data)->name) | |
1547 | #define nft_trans_chain_stats(trans) \ | |
1548 | (((struct nft_trans_chain *)trans->data)->stats) | |
1549 | #define nft_trans_chain_policy(trans) \ | |
1550 | (((struct nft_trans_chain *)trans->data)->policy) | |
74cccc3d PNA |
1551 | #define nft_trans_chain_id(trans) \ |
1552 | (((struct nft_trans_chain *)trans->data)->chain_id) | |
1a1e1a12 PM |
1553 | |
1554 | struct nft_trans_table { | |
1555 | bool update; | |
1a1e1a12 PM |
1556 | }; |
1557 | ||
1558 | #define nft_trans_table_update(trans) \ | |
1559 | (((struct nft_trans_table *)trans->data)->update) | |
1a1e1a12 PM |
1560 | |
1561 | struct nft_trans_elem { | |
1562 | struct nft_set *set; | |
1563 | struct nft_set_elem elem; | |
6a0a8d10 | 1564 | bool bound; |
1a1e1a12 PM |
1565 | }; |
1566 | ||
1567 | #define nft_trans_elem_set(trans) \ | |
1568 | (((struct nft_trans_elem *)trans->data)->set) | |
1569 | #define nft_trans_elem(trans) \ | |
1570 | (((struct nft_trans_elem *)trans->data)->elem) | |
6a0a8d10 PNA |
1571 | #define nft_trans_elem_set_bound(trans) \ |
1572 | (((struct nft_trans_elem *)trans->data)->bound) | |
1a1e1a12 | 1573 | |
e5009240 PNA |
1574 | struct nft_trans_obj { |
1575 | struct nft_object *obj; | |
d62d0ba9 FFM |
1576 | struct nft_object *newobj; |
1577 | bool update; | |
e5009240 PNA |
1578 | }; |
1579 | ||
1580 | #define nft_trans_obj(trans) \ | |
1581 | (((struct nft_trans_obj *)trans->data)->obj) | |
d62d0ba9 FFM |
1582 | #define nft_trans_obj_newobj(trans) \ |
1583 | (((struct nft_trans_obj *)trans->data)->newobj) | |
1584 | #define nft_trans_obj_update(trans) \ | |
1585 | (((struct nft_trans_obj *)trans->data)->update) | |
e5009240 | 1586 | |
3b49e2e9 PNA |
1587 | struct nft_trans_flowtable { |
1588 | struct nft_flowtable *flowtable; | |
78d9f48f PNA |
1589 | bool update; |
1590 | struct list_head hook_list; | |
7b35582c | 1591 | u32 flags; |
3b49e2e9 PNA |
1592 | }; |
1593 | ||
1594 | #define nft_trans_flowtable(trans) \ | |
1595 | (((struct nft_trans_flowtable *)trans->data)->flowtable) | |
78d9f48f PNA |
1596 | #define nft_trans_flowtable_update(trans) \ |
1597 | (((struct nft_trans_flowtable *)trans->data)->update) | |
1598 | #define nft_trans_flowtable_hooks(trans) \ | |
1599 | (((struct nft_trans_flowtable *)trans->data)->hook_list) | |
7b35582c PNA |
1600 | #define nft_trans_flowtable_flags(trans) \ |
1601 | (((struct nft_trans_flowtable *)trans->data)->flags) | |
3b49e2e9 | 1602 | |
02c7b25e | 1603 | int __init nft_chain_filter_init(void); |
d209df3e | 1604 | void nft_chain_filter_fini(void); |
02c7b25e | 1605 | |
c1deb065 FW |
1606 | void __init nft_chain_route_init(void); |
1607 | void nft_chain_route_fini(void); | |
ffe8923f FW |
1608 | |
1609 | void nf_tables_trans_destroy_flush_work(void); | |
917d80d3 PNA |
1610 | |
1611 | int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result); | |
1612 | __be64 nf_jiffies64_to_msecs(u64 input); | |
1613 | ||
cefa31a9 FW |
1614 | #ifdef CONFIG_MODULES |
1615 | __printf(2, 3) int nft_request_module(struct net *net, const char *fmt, ...); | |
1616 | #else | |
1617 | static inline int nft_request_module(struct net *net, const char *fmt, ...) { return -ENOENT; } | |
1618 | #endif | |
0854db2a FW |
1619 | |
1620 | struct nftables_pernet { | |
1621 | struct list_head tables; | |
1622 | struct list_head commit_list; | |
1623 | struct list_head module_list; | |
1624 | struct list_head notify_list; | |
1625 | struct mutex commit_mutex; | |
1626 | unsigned int base_seq; | |
1627 | u8 validate_state; | |
1628 | }; | |
1629 | ||
d59d2f82 PNA |
1630 | extern unsigned int nf_tables_net_id; |
1631 | ||
1632 | static inline struct nftables_pernet *nft_pernet(const struct net *net) | |
1633 | { | |
1634 | return net_generic(net, nf_tables_net_id); | |
1635 | } | |
1636 | ||
b2d30654 PNA |
1637 | #define __NFT_REDUCE_READONLY 1UL |
1638 | #define NFT_REDUCE_READONLY (void *)__NFT_REDUCE_READONLY | |
1639 | ||
1640 | static inline bool nft_reduce_is_readonly(const struct nft_expr *expr) | |
1641 | { | |
1642 | return expr->ops->reduce == NFT_REDUCE_READONLY; | |
1643 | } | |
1644 | ||
34cc9e52 PNA |
1645 | void nft_reg_track_update(struct nft_regs_track *track, |
1646 | const struct nft_expr *expr, u8 dreg, u8 len); | |
1647 | void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len); | |
1648 | void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg); | |
1649 | ||
1650 | static inline bool nft_reg_track_cmp(struct nft_regs_track *track, | |
1651 | const struct nft_expr *expr, u8 dreg) | |
1652 | { | |
1653 | return track->regs[dreg].selector && | |
1654 | track->regs[dreg].selector->ops == expr->ops && | |
1655 | track->regs[dreg].num_reg == 0; | |
1656 | } | |
1657 | ||
96518518 | 1658 | #endif /* _NET_NF_TABLES_H */ |