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> |
96518518 | 16 | |
a4cb98f3 PG |
17 | struct module; |
18 | ||
20a69341 PM |
19 | #define NFT_JUMP_STACK_SIZE 16 |
20 | ||
96518518 PM |
21 | struct nft_pktinfo { |
22 | struct sk_buff *skb; | |
beac5afa | 23 | bool tprot_set; |
4566bf27 | 24 | u8 tprot; |
0ca743a5 PNA |
25 | /* for x_tables compatibility */ |
26 | struct xt_action_param xt; | |
96518518 PM |
27 | }; |
28 | ||
0e5a1c7e PNA |
29 | static inline struct net *nft_net(const struct nft_pktinfo *pkt) |
30 | { | |
31 | return pkt->xt.state->net; | |
32 | } | |
33 | ||
34 | static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) | |
35 | { | |
36 | return pkt->xt.state->hook; | |
37 | } | |
38 | ||
39 | static inline u8 nft_pf(const struct nft_pktinfo *pkt) | |
40 | { | |
41 | return pkt->xt.state->pf; | |
42 | } | |
43 | ||
44 | static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) | |
45 | { | |
46 | return pkt->xt.state->in; | |
47 | } | |
48 | ||
49 | static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) | |
50 | { | |
51 | return pkt->xt.state->out; | |
52 | } | |
53 | ||
0ca743a5 | 54 | static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, |
0ca743a5 | 55 | struct sk_buff *skb, |
073bfd56 | 56 | const struct nf_hook_state *state) |
0ca743a5 PNA |
57 | { |
58 | pkt->skb = skb; | |
613dbd95 | 59 | pkt->xt.state = state; |
0ca743a5 PNA |
60 | } |
61 | ||
7a4473a3 PNA |
62 | static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, |
63 | struct sk_buff *skb) | |
beac5afa PNA |
64 | { |
65 | pkt->tprot_set = false; | |
66 | pkt->tprot = 0; | |
67 | pkt->xt.thoff = 0; | |
68 | pkt->xt.fragoff = 0; | |
69 | } | |
70 | ||
a55e22e9 PM |
71 | /** |
72 | * struct nft_verdict - nf_tables verdict | |
73 | * | |
74 | * @code: nf_tables/netfilter verdict code | |
75 | * @chain: destination chain for NFT_JUMP/NFT_GOTO | |
76 | */ | |
77 | struct nft_verdict { | |
78 | u32 code; | |
79 | struct nft_chain *chain; | |
80 | }; | |
81 | ||
96518518 PM |
82 | struct nft_data { |
83 | union { | |
1ca2e170 PM |
84 | u32 data[4]; |
85 | struct nft_verdict verdict; | |
96518518 PM |
86 | }; |
87 | } __attribute__((aligned(__alignof__(u64)))); | |
88 | ||
a55e22e9 PM |
89 | /** |
90 | * struct nft_regs - nf_tables register set | |
91 | * | |
92 | * @data: data registers | |
93 | * @verdict: verdict register | |
94 | * | |
95 | * The first four data registers alias to the verdict register. | |
96 | */ | |
97 | struct nft_regs { | |
98 | union { | |
49499c3e | 99 | u32 data[20]; |
a55e22e9 PM |
100 | struct nft_verdict verdict; |
101 | }; | |
102 | }; | |
103 | ||
a1b840ad | 104 | /* Store/load an u8, u16 or u64 integer to/from the u32 data register. |
10596608 LZ |
105 | * |
106 | * Note, when using concatenations, register allocation happens at 32-bit | |
107 | * level. So for store instruction, pad the rest part with zero to avoid | |
108 | * garbage values. | |
109 | */ | |
110 | ||
a1b840ad | 111 | static inline void nft_reg_store8(u32 *dreg, u8 val) |
10596608 LZ |
112 | { |
113 | *dreg = 0; | |
a1b840ad | 114 | *(u8 *)dreg = val; |
10596608 LZ |
115 | } |
116 | ||
a1b840ad AJ |
117 | static inline u8 nft_reg_load8(u32 *sreg) |
118 | { | |
119 | return *(u8 *)sreg; | |
120 | } | |
121 | ||
122 | static inline void nft_reg_store16(u32 *dreg, u16 val) | |
10596608 LZ |
123 | { |
124 | *dreg = 0; | |
a1b840ad | 125 | *(u16 *)dreg = val; |
10596608 LZ |
126 | } |
127 | ||
128 | static inline u16 nft_reg_load16(u32 *sreg) | |
129 | { | |
130 | return *(u16 *)sreg; | |
131 | } | |
132 | ||
a1b840ad | 133 | static inline void nft_reg_store64(u32 *dreg, u64 val) |
10596608 | 134 | { |
a1b840ad AJ |
135 | put_unaligned(val, (u64 *)dreg); |
136 | } | |
137 | ||
138 | static inline u64 nft_reg_load64(u32 *sreg) | |
139 | { | |
140 | return get_unaligned((u64 *)sreg); | |
10596608 LZ |
141 | } |
142 | ||
49499c3e PM |
143 | static inline void nft_data_copy(u32 *dst, const struct nft_data *src, |
144 | unsigned int len) | |
96518518 | 145 | { |
49499c3e | 146 | memcpy(dst, src, len); |
96518518 PM |
147 | } |
148 | ||
149 | static inline void nft_data_debug(const struct nft_data *data) | |
150 | { | |
151 | pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", | |
152 | data->data[0], data->data[1], | |
153 | data->data[2], data->data[3]); | |
154 | } | |
155 | ||
156 | /** | |
20a69341 | 157 | * struct nft_ctx - nf_tables rule/set context |
96518518 | 158 | * |
99633ab2 | 159 | * @net: net namespace |
96518518 PM |
160 | * @table: the table the chain is contained in |
161 | * @chain: the chain the rule is contained in | |
0ca743a5 | 162 | * @nla: netlink attributes |
128ad332 PNA |
163 | * @portid: netlink portID of the original message |
164 | * @seq: netlink sequence number | |
36596dad | 165 | * @family: protocol family |
26b2f552 | 166 | * @level: depth of the chains |
128ad332 | 167 | * @report: notify via unicast netlink message |
96518518 PM |
168 | */ |
169 | struct nft_ctx { | |
99633ab2 | 170 | struct net *net; |
7c95f6d8 PNA |
171 | struct nft_table *table; |
172 | struct nft_chain *chain; | |
0ca743a5 | 173 | const struct nlattr * const *nla; |
128ad332 PNA |
174 | u32 portid; |
175 | u32 seq; | |
c9626a2c | 176 | u16 flags; |
36596dad | 177 | u8 family; |
26b2f552 | 178 | u8 level; |
128ad332 | 179 | bool report; |
96518518 PM |
180 | }; |
181 | ||
96518518 PM |
182 | struct nft_data_desc { |
183 | enum nft_data_types type; | |
184 | unsigned int len; | |
185 | }; | |
186 | ||
d0a11fc3 PM |
187 | int nft_data_init(const struct nft_ctx *ctx, |
188 | struct nft_data *data, unsigned int size, | |
5eccdfaa | 189 | struct nft_data_desc *desc, const struct nlattr *nla); |
bb7b40ae | 190 | void nft_data_hold(const struct nft_data *data, enum nft_data_types type); |
59105446 | 191 | void nft_data_release(const struct nft_data *data, enum nft_data_types type); |
5eccdfaa JP |
192 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, |
193 | enum nft_data_types type, unsigned int len); | |
96518518 PM |
194 | |
195 | static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) | |
196 | { | |
197 | return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; | |
198 | } | |
199 | ||
20a69341 PM |
200 | static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) |
201 | { | |
bf798657 | 202 | return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; |
20a69341 PM |
203 | } |
204 | ||
f1d505bb | 205 | int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); |
b1c96ed3 PM |
206 | unsigned int nft_parse_register(const struct nlattr *attr); |
207 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); | |
208 | ||
d07db988 | 209 | int nft_validate_register_load(enum nft_registers reg, unsigned int len); |
1ec10212 PM |
210 | int nft_validate_register_store(const struct nft_ctx *ctx, |
211 | enum nft_registers reg, | |
212 | const struct nft_data *data, | |
213 | enum nft_data_types type, unsigned int len); | |
96518518 | 214 | |
86f1ec32 PM |
215 | /** |
216 | * struct nft_userdata - user defined data associated with an object | |
217 | * | |
218 | * @len: length of the data | |
219 | * @data: content | |
220 | * | |
221 | * The presence of user data is indicated in an object specific fashion, | |
222 | * so a length of zero can't occur and the value "len" indicates data | |
223 | * of length len + 1. | |
224 | */ | |
225 | struct nft_userdata { | |
226 | u8 len; | |
227 | unsigned char data[0]; | |
228 | }; | |
229 | ||
20a69341 PM |
230 | /** |
231 | * struct nft_set_elem - generic representation of set elements | |
232 | * | |
20a69341 | 233 | * @key: element key |
fe2811eb | 234 | * @priv: element private data and extensions |
20a69341 PM |
235 | */ |
236 | struct nft_set_elem { | |
7d740264 PM |
237 | union { |
238 | u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; | |
239 | struct nft_data val; | |
240 | } key; | |
fe2811eb | 241 | void *priv; |
20a69341 PM |
242 | }; |
243 | ||
244 | struct nft_set; | |
245 | struct nft_set_iter { | |
8588ac09 | 246 | u8 genmask; |
20a69341 PM |
247 | unsigned int count; |
248 | unsigned int skip; | |
249 | int err; | |
250 | int (*fn)(const struct nft_ctx *ctx, | |
de70185d | 251 | struct nft_set *set, |
20a69341 | 252 | const struct nft_set_iter *iter, |
de70185d | 253 | struct nft_set_elem *elem); |
20a69341 PM |
254 | }; |
255 | ||
c50b960c PM |
256 | /** |
257 | * struct nft_set_desc - description of set elements | |
258 | * | |
259 | * @klen: key length | |
260 | * @dlen: data length | |
261 | * @size: number of set elements | |
262 | */ | |
263 | struct nft_set_desc { | |
264 | unsigned int klen; | |
265 | unsigned int dlen; | |
266 | unsigned int size; | |
267 | }; | |
268 | ||
269 | /** | |
270 | * enum nft_set_class - performance class | |
271 | * | |
272 | * @NFT_LOOKUP_O_1: constant, O(1) | |
273 | * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) | |
274 | * @NFT_LOOKUP_O_N: linear, O(N) | |
275 | */ | |
276 | enum nft_set_class { | |
277 | NFT_SET_CLASS_O_1, | |
278 | NFT_SET_CLASS_O_LOG_N, | |
279 | NFT_SET_CLASS_O_N, | |
280 | }; | |
281 | ||
282 | /** | |
283 | * struct nft_set_estimate - estimation of memory and performance | |
284 | * characteristics | |
285 | * | |
286 | * @size: required memory | |
55af753c | 287 | * @lookup: lookup performance class |
0b5a7874 | 288 | * @space: memory class |
c50b960c PM |
289 | */ |
290 | struct nft_set_estimate { | |
4ef360dd | 291 | u64 size; |
55af753c | 292 | enum nft_set_class lookup; |
0b5a7874 | 293 | enum nft_set_class space; |
c50b960c PM |
294 | }; |
295 | ||
b2832dd6 | 296 | struct nft_set_ext; |
22fe54d5 | 297 | struct nft_expr; |
b2832dd6 | 298 | |
20a69341 PM |
299 | /** |
300 | * struct nft_set_ops - nf_tables set operations | |
301 | * | |
302 | * @lookup: look up an element within the set | |
d0a8d877 AJ |
303 | * @update: update an element if exists, add it if doesn't exist |
304 | * @delete: delete an element | |
20a69341 | 305 | * @insert: insert new element into set |
cc02e457 | 306 | * @activate: activate new element in the next generation |
8411b644 | 307 | * @deactivate: lookup for element and deactivate it in the next generation |
1ba1c414 | 308 | * @flush: deactivate element in the next generation |
20a69341 | 309 | * @remove: remove element from set |
d0a8d877 | 310 | * @walk: iterate over all set elements |
ba0e4d99 | 311 | * @get: get set elements |
20a69341 PM |
312 | * @privsize: function to return size of set private data |
313 | * @init: initialize private data of new set instance | |
314 | * @destroy: destroy private data of set instance | |
fe2811eb | 315 | * @elemsize: element private size |
d0a8d877 AJ |
316 | * |
317 | * Operations lookup, update and delete have simpler interfaces, are faster | |
318 | * and currently only used in the packet path. All the rest are slower, | |
319 | * control plane functions. | |
20a69341 PM |
320 | */ |
321 | struct nft_set_ops { | |
42a55769 PNA |
322 | bool (*lookup)(const struct net *net, |
323 | const struct nft_set *set, | |
8cd8937a | 324 | const u32 *key, |
b2832dd6 | 325 | const struct nft_set_ext **ext); |
22fe54d5 | 326 | bool (*update)(struct nft_set *set, |
8cd8937a | 327 | const u32 *key, |
22fe54d5 PM |
328 | void *(*new)(struct nft_set *, |
329 | const struct nft_expr *, | |
a55e22e9 | 330 | struct nft_regs *), |
22fe54d5 | 331 | const struct nft_expr *expr, |
a55e22e9 | 332 | struct nft_regs *regs, |
22fe54d5 | 333 | const struct nft_set_ext **ext); |
d0a8d877 AJ |
334 | bool (*delete)(const struct nft_set *set, |
335 | const u32 *key); | |
22fe54d5 | 336 | |
42a55769 PNA |
337 | int (*insert)(const struct net *net, |
338 | const struct nft_set *set, | |
c016c7e4 PNA |
339 | const struct nft_set_elem *elem, |
340 | struct nft_set_ext **ext); | |
42a55769 PNA |
341 | void (*activate)(const struct net *net, |
342 | const struct nft_set *set, | |
cc02e457 | 343 | const struct nft_set_elem *elem); |
42a55769 PNA |
344 | void * (*deactivate)(const struct net *net, |
345 | const struct nft_set *set, | |
cc02e457 | 346 | const struct nft_set_elem *elem); |
1ba1c414 PNA |
347 | bool (*flush)(const struct net *net, |
348 | const struct nft_set *set, | |
349 | void *priv); | |
5cb82a38 PNA |
350 | void (*remove)(const struct net *net, |
351 | const struct nft_set *set, | |
20a69341 PM |
352 | const struct nft_set_elem *elem); |
353 | void (*walk)(const struct nft_ctx *ctx, | |
de70185d | 354 | struct nft_set *set, |
20a69341 | 355 | struct nft_set_iter *iter); |
ba0e4d99 PNA |
356 | void * (*get)(const struct net *net, |
357 | const struct nft_set *set, | |
358 | const struct nft_set_elem *elem, | |
359 | unsigned int flags); | |
20a69341 | 360 | |
4ef360dd | 361 | u64 (*privsize)(const struct nlattr * const nla[], |
347b408d | 362 | const struct nft_set_desc *desc); |
c50b960c PM |
363 | bool (*estimate)(const struct nft_set_desc *desc, |
364 | u32 features, | |
365 | struct nft_set_estimate *est); | |
20a69341 | 366 | int (*init)(const struct nft_set *set, |
c50b960c | 367 | const struct nft_set_desc *desc, |
20a69341 PM |
368 | const struct nlattr * const nla[]); |
369 | void (*destroy)(const struct nft_set *set); | |
79b174ad | 370 | void (*gc_init)(const struct nft_set *set); |
20a69341 | 371 | |
fe2811eb | 372 | unsigned int elemsize; |
71cc0873 PS |
373 | }; |
374 | ||
375 | /** | |
376 | * struct nft_set_type - nf_tables set type | |
377 | * | |
378 | * @ops: set ops for this type | |
379 | * @list: used internally | |
380 | * @owner: module reference | |
381 | * @features: features supported by the implementation | |
382 | */ | |
383 | struct nft_set_type { | |
384 | const struct nft_set_ops ops; | |
385 | struct list_head list; | |
386 | struct module *owner; | |
20a69341 PM |
387 | u32 features; |
388 | }; | |
71cc0873 | 389 | #define to_set_type(o) container_of(o, struct nft_set_type, ops) |
20a69341 | 390 | |
2b664957 PNA |
391 | int nft_register_set(struct nft_set_type *type); |
392 | void nft_unregister_set(struct nft_set_type *type); | |
20a69341 PM |
393 | |
394 | /** | |
395 | * struct nft_set - nf_tables set instance | |
396 | * | |
397 | * @list: table set list node | |
398 | * @bindings: list of set bindings | |
3453c927 PNA |
399 | * @table: table this set belongs to |
400 | * @net: netnamespace this set belongs to | |
20a69341 | 401 | * @name: name of the set |
3ecbfd65 | 402 | * @handle: unique handle of the set |
20a69341 PM |
403 | * @ktype: key type (numeric type defined by userspace, not used in the kernel) |
404 | * @dtype: data type (verdict or numeric type defined by userspace) | |
8aeff920 | 405 | * @objtype: object type (see NFT_OBJECT_* definitions) |
c50b960c | 406 | * @size: maximum set size |
273fe3f1 | 407 | * @use: number of rules references to this set |
c50b960c | 408 | * @nelems: number of elements |
3dd0673a | 409 | * @ndeact: number of deactivated elements queued for removal |
d3e2a111 | 410 | * @timeout: default timeout value in jiffies |
761da293 | 411 | * @gc_int: garbage collection interval in msecs |
9363dc4b | 412 | * @policy: set parameterization (see enum nft_set_policies) |
e6d8ecac CFG |
413 | * @udlen: user data length |
414 | * @udata: user data | |
20a69341 PM |
415 | * @ops: set ops |
416 | * @flags: set flags | |
37a9cc52 | 417 | * @genmask: generation mask |
20a69341 PM |
418 | * @klen: key length |
419 | * @dlen: data length | |
420 | * @data: private set data | |
421 | */ | |
422 | struct nft_set { | |
423 | struct list_head list; | |
424 | struct list_head bindings; | |
3453c927 PNA |
425 | struct nft_table *table; |
426 | possible_net_t net; | |
38745490 | 427 | char *name; |
3ecbfd65 | 428 | u64 handle; |
20a69341 PM |
429 | u32 ktype; |
430 | u32 dtype; | |
8aeff920 | 431 | u32 objtype; |
c50b960c | 432 | u32 size; |
273fe3f1 | 433 | u32 use; |
3dd0673a PM |
434 | atomic_t nelems; |
435 | u32 ndeact; | |
761da293 PM |
436 | u64 timeout; |
437 | u32 gc_int; | |
9363dc4b | 438 | u16 policy; |
e6d8ecac CFG |
439 | u16 udlen; |
440 | unsigned char *udata; | |
20a69341 PM |
441 | /* runtime data below here */ |
442 | const struct nft_set_ops *ops ____cacheline_aligned; | |
6a0a8d10 | 443 | u16 flags:14, |
37a9cc52 | 444 | genmask:2; |
20a69341 PM |
445 | u8 klen; |
446 | u8 dlen; | |
447 | unsigned char data[] | |
448 | __attribute__((aligned(__alignof__(u64)))); | |
449 | }; | |
450 | ||
408070d6 PNA |
451 | static inline bool nft_set_is_anonymous(const struct nft_set *set) |
452 | { | |
453 | return set->flags & NFT_SET_ANONYMOUS; | |
454 | } | |
455 | ||
20a69341 PM |
456 | static inline void *nft_set_priv(const struct nft_set *set) |
457 | { | |
458 | return (void *)set->data; | |
459 | } | |
460 | ||
9d098292 PM |
461 | static inline struct nft_set *nft_set_container_of(const void *priv) |
462 | { | |
463 | return (void *)priv - offsetof(struct nft_set, data); | |
464 | } | |
465 | ||
10659cba PNA |
466 | struct nft_set *nft_set_lookup_global(const struct net *net, |
467 | const struct nft_table *table, | |
468 | const struct nlattr *nla_set_name, | |
469 | const struct nlattr *nla_set_id, | |
470 | u8 genmask); | |
20a69341 | 471 | |
761da293 PM |
472 | static inline unsigned long nft_set_gc_interval(const struct nft_set *set) |
473 | { | |
474 | return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; | |
475 | } | |
476 | ||
20a69341 PM |
477 | /** |
478 | * struct nft_set_binding - nf_tables set binding | |
479 | * | |
480 | * @list: set bindings list node | |
481 | * @chain: chain containing the rule bound to the set | |
11113e19 | 482 | * @flags: set action flags |
20a69341 PM |
483 | * |
484 | * A set binding contains all information necessary for validation | |
485 | * of new elements added to a bound set. | |
486 | */ | |
487 | struct nft_set_binding { | |
488 | struct list_head list; | |
489 | const struct nft_chain *chain; | |
11113e19 | 490 | u32 flags; |
20a69341 PM |
491 | }; |
492 | ||
273fe3f1 PNA |
493 | enum nft_trans_phase; |
494 | void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set, | |
495 | struct nft_set_binding *binding, | |
496 | enum nft_trans_phase phase); | |
5eccdfaa JP |
497 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, |
498 | struct nft_set_binding *binding); | |
cd5125d8 | 499 | void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set); |
20a69341 | 500 | |
3ac4c07a PM |
501 | /** |
502 | * enum nft_set_extensions - set extension type IDs | |
503 | * | |
504 | * @NFT_SET_EXT_KEY: element key | |
505 | * @NFT_SET_EXT_DATA: mapping data | |
506 | * @NFT_SET_EXT_FLAGS: element flags | |
c3e1b005 PM |
507 | * @NFT_SET_EXT_TIMEOUT: element timeout |
508 | * @NFT_SET_EXT_EXPIRATION: element expiration time | |
68e942e8 | 509 | * @NFT_SET_EXT_USERDATA: user data associated with the element |
f25ad2e9 | 510 | * @NFT_SET_EXT_EXPR: expression assiociated with the element |
8aeff920 | 511 | * @NFT_SET_EXT_OBJREF: stateful object reference associated with element |
3ac4c07a PM |
512 | * @NFT_SET_EXT_NUM: number of extension types |
513 | */ | |
514 | enum nft_set_extensions { | |
515 | NFT_SET_EXT_KEY, | |
516 | NFT_SET_EXT_DATA, | |
517 | NFT_SET_EXT_FLAGS, | |
c3e1b005 PM |
518 | NFT_SET_EXT_TIMEOUT, |
519 | NFT_SET_EXT_EXPIRATION, | |
68e942e8 | 520 | NFT_SET_EXT_USERDATA, |
f25ad2e9 | 521 | NFT_SET_EXT_EXPR, |
8aeff920 | 522 | NFT_SET_EXT_OBJREF, |
3ac4c07a PM |
523 | NFT_SET_EXT_NUM |
524 | }; | |
525 | ||
526 | /** | |
527 | * struct nft_set_ext_type - set extension type | |
528 | * | |
529 | * @len: fixed part length of the extension | |
530 | * @align: alignment requirements of the extension | |
531 | */ | |
532 | struct nft_set_ext_type { | |
533 | u8 len; | |
534 | u8 align; | |
535 | }; | |
536 | ||
537 | extern const struct nft_set_ext_type nft_set_ext_types[]; | |
538 | ||
539 | /** | |
540 | * struct nft_set_ext_tmpl - set extension template | |
541 | * | |
542 | * @len: length of extension area | |
543 | * @offset: offsets of individual extension types | |
544 | */ | |
545 | struct nft_set_ext_tmpl { | |
546 | u16 len; | |
547 | u8 offset[NFT_SET_EXT_NUM]; | |
548 | }; | |
549 | ||
550 | /** | |
551 | * struct nft_set_ext - set extensions | |
552 | * | |
cc02e457 | 553 | * @genmask: generation mask |
3ac4c07a PM |
554 | * @offset: offsets of individual extension types |
555 | * @data: beginning of extension data | |
556 | */ | |
557 | struct nft_set_ext { | |
cc02e457 | 558 | u8 genmask; |
3ac4c07a PM |
559 | u8 offset[NFT_SET_EXT_NUM]; |
560 | char data[0]; | |
561 | }; | |
562 | ||
563 | static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) | |
564 | { | |
565 | memset(tmpl, 0, sizeof(*tmpl)); | |
566 | tmpl->len = sizeof(struct nft_set_ext); | |
567 | } | |
568 | ||
569 | static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, | |
570 | unsigned int len) | |
571 | { | |
572 | tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); | |
573 | BUG_ON(tmpl->len > U8_MAX); | |
574 | tmpl->offset[id] = tmpl->len; | |
575 | tmpl->len += nft_set_ext_types[id].len + len; | |
576 | } | |
577 | ||
578 | static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) | |
579 | { | |
580 | nft_set_ext_add_length(tmpl, id, 0); | |
581 | } | |
582 | ||
583 | static inline void nft_set_ext_init(struct nft_set_ext *ext, | |
584 | const struct nft_set_ext_tmpl *tmpl) | |
585 | { | |
586 | memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); | |
587 | } | |
588 | ||
589 | static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
590 | { | |
591 | return !!ext->offset[id]; | |
592 | } | |
593 | ||
594 | static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) | |
595 | { | |
596 | return ext && __nft_set_ext_exists(ext, id); | |
597 | } | |
598 | ||
599 | static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) | |
600 | { | |
601 | return (void *)ext + ext->offset[id]; | |
602 | } | |
603 | ||
604 | static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) | |
605 | { | |
606 | return nft_set_ext(ext, NFT_SET_EXT_KEY); | |
607 | } | |
608 | ||
609 | static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) | |
610 | { | |
611 | return nft_set_ext(ext, NFT_SET_EXT_DATA); | |
612 | } | |
613 | ||
614 | static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) | |
615 | { | |
616 | return nft_set_ext(ext, NFT_SET_EXT_FLAGS); | |
617 | } | |
ef1f7df9 | 618 | |
c3e1b005 PM |
619 | static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) |
620 | { | |
621 | return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); | |
622 | } | |
623 | ||
8e1102d5 | 624 | static inline u64 *nft_set_ext_expiration(const struct nft_set_ext *ext) |
c3e1b005 PM |
625 | { |
626 | return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); | |
627 | } | |
628 | ||
68e942e8 PM |
629 | static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) |
630 | { | |
631 | return nft_set_ext(ext, NFT_SET_EXT_USERDATA); | |
632 | } | |
633 | ||
f25ad2e9 PM |
634 | static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) |
635 | { | |
636 | return nft_set_ext(ext, NFT_SET_EXT_EXPR); | |
637 | } | |
638 | ||
c3e1b005 PM |
639 | static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) |
640 | { | |
641 | return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && | |
8e1102d5 | 642 | time_is_before_eq_jiffies64(*nft_set_ext_expiration(ext)); |
c3e1b005 PM |
643 | } |
644 | ||
fe2811eb PM |
645 | static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, |
646 | void *elem) | |
647 | { | |
648 | return elem + set->ops->elemsize; | |
649 | } | |
650 | ||
8aeff920 PNA |
651 | static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) |
652 | { | |
653 | return nft_set_ext(ext, NFT_SET_EXT_OBJREF); | |
654 | } | |
655 | ||
22fe54d5 PM |
656 | void *nft_set_elem_init(const struct nft_set *set, |
657 | const struct nft_set_ext_tmpl *tmpl, | |
49499c3e | 658 | const u32 *key, const u32 *data, |
79ebb5bb | 659 | u64 timeout, u64 expiration, gfp_t gfp); |
61f9e292 LZ |
660 | void nft_set_elem_destroy(const struct nft_set *set, void *elem, |
661 | bool destroy_expr); | |
61edafbb | 662 | |
cfed7e1b PM |
663 | /** |
664 | * struct nft_set_gc_batch_head - nf_tables set garbage collection batch | |
665 | * | |
666 | * @rcu: rcu head | |
667 | * @set: set the elements belong to | |
668 | * @cnt: count of elements | |
669 | */ | |
670 | struct nft_set_gc_batch_head { | |
671 | struct rcu_head rcu; | |
672 | const struct nft_set *set; | |
673 | unsigned int cnt; | |
674 | }; | |
675 | ||
676 | #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ | |
677 | sizeof(struct nft_set_gc_batch_head)) / \ | |
678 | sizeof(void *)) | |
679 | ||
680 | /** | |
681 | * struct nft_set_gc_batch - nf_tables set garbage collection batch | |
682 | * | |
683 | * @head: GC batch head | |
684 | * @elems: garbage collection elements | |
685 | */ | |
686 | struct nft_set_gc_batch { | |
687 | struct nft_set_gc_batch_head head; | |
688 | void *elems[NFT_SET_GC_BATCH_SIZE]; | |
689 | }; | |
690 | ||
691 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, | |
692 | gfp_t gfp); | |
693 | void nft_set_gc_batch_release(struct rcu_head *rcu); | |
694 | ||
695 | static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) | |
696 | { | |
697 | if (gcb != NULL) | |
698 | call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); | |
699 | } | |
700 | ||
701 | static inline struct nft_set_gc_batch * | |
702 | nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, | |
703 | gfp_t gfp) | |
704 | { | |
705 | if (gcb != NULL) { | |
706 | if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) | |
707 | return gcb; | |
708 | nft_set_gc_batch_complete(gcb); | |
709 | } | |
710 | return nft_set_gc_batch_alloc(set, gfp); | |
711 | } | |
712 | ||
713 | static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, | |
714 | void *elem) | |
715 | { | |
716 | gcb->elems[gcb->head.cnt++] = elem; | |
717 | } | |
718 | ||
b8e20400 | 719 | struct nft_expr_ops; |
96518518 | 720 | /** |
ef1f7df9 | 721 | * struct nft_expr_type - nf_tables expression type |
96518518 | 722 | * |
ef1f7df9 | 723 | * @select_ops: function to select nft_expr_ops |
b8e20400 | 724 | * @release_ops: release nft_expr_ops |
ef1f7df9 | 725 | * @ops: default ops, used when no select_ops functions is present |
96518518 PM |
726 | * @list: used internally |
727 | * @name: Identifier | |
728 | * @owner: module reference | |
729 | * @policy: netlink attribute policy | |
730 | * @maxattr: highest netlink attribute number | |
64d46806 | 731 | * @family: address family for AF-specific types |
151d799a | 732 | * @flags: expression type flags |
ef1f7df9 PM |
733 | */ |
734 | struct nft_expr_type { | |
0ca743a5 PNA |
735 | const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, |
736 | const struct nlattr * const tb[]); | |
b8e20400 | 737 | void (*release_ops)(const struct nft_expr_ops *ops); |
ef1f7df9 PM |
738 | const struct nft_expr_ops *ops; |
739 | struct list_head list; | |
740 | const char *name; | |
741 | struct module *owner; | |
742 | const struct nla_policy *policy; | |
743 | unsigned int maxattr; | |
64d46806 | 744 | u8 family; |
151d799a | 745 | u8 flags; |
ef1f7df9 PM |
746 | }; |
747 | ||
151d799a | 748 | #define NFT_EXPR_STATEFUL 0x1 |
79b174ad | 749 | #define NFT_EXPR_GC 0x2 |
151d799a | 750 | |
f6ac8585 PNA |
751 | enum nft_trans_phase { |
752 | NFT_TRANS_PREPARE, | |
753 | NFT_TRANS_ABORT, | |
754 | NFT_TRANS_COMMIT, | |
755 | NFT_TRANS_RELEASE | |
756 | }; | |
757 | ||
c9626a2c PNA |
758 | struct nft_flow_rule; |
759 | struct nft_offload_ctx; | |
760 | ||
ef1f7df9 PM |
761 | /** |
762 | * struct nft_expr_ops - nf_tables expression operations | |
763 | * | |
764 | * @eval: Expression evaluation function | |
96518518 | 765 | * @size: full expression size, including private data size |
ef1f7df9 | 766 | * @init: initialization function |
cd5125d8 FW |
767 | * @activate: activate expression in the next generation |
768 | * @deactivate: deactivate expression in next generation | |
769 | * @destroy: destruction function, called after synchronize_rcu | |
ef1f7df9 PM |
770 | * @dump: function to dump parameters |
771 | * @type: expression type | |
0ca743a5 PNA |
772 | * @validate: validate expression, called during loop detection |
773 | * @data: extra data to attach to this expression operation | |
96518518 PM |
774 | */ |
775 | struct nft_expr; | |
776 | struct nft_expr_ops { | |
777 | void (*eval)(const struct nft_expr *expr, | |
a55e22e9 | 778 | struct nft_regs *regs, |
96518518 | 779 | const struct nft_pktinfo *pkt); |
086f3321 PNA |
780 | int (*clone)(struct nft_expr *dst, |
781 | const struct nft_expr *src); | |
ef1f7df9 PM |
782 | unsigned int size; |
783 | ||
96518518 PM |
784 | int (*init)(const struct nft_ctx *ctx, |
785 | const struct nft_expr *expr, | |
786 | const struct nlattr * const tb[]); | |
bb7b40ae PNA |
787 | void (*activate)(const struct nft_ctx *ctx, |
788 | const struct nft_expr *expr); | |
789 | void (*deactivate)(const struct nft_ctx *ctx, | |
f6ac8585 PNA |
790 | const struct nft_expr *expr, |
791 | enum nft_trans_phase phase); | |
62472bce PM |
792 | void (*destroy)(const struct nft_ctx *ctx, |
793 | const struct nft_expr *expr); | |
371ebcbb PNA |
794 | void (*destroy_clone)(const struct nft_ctx *ctx, |
795 | const struct nft_expr *expr); | |
96518518 PM |
796 | int (*dump)(struct sk_buff *skb, |
797 | const struct nft_expr *expr); | |
0ca743a5 PNA |
798 | int (*validate)(const struct nft_ctx *ctx, |
799 | const struct nft_expr *expr, | |
800 | const struct nft_data **data); | |
79b174ad PNA |
801 | bool (*gc)(struct net *net, |
802 | const struct nft_expr *expr); | |
c9626a2c PNA |
803 | int (*offload)(struct nft_offload_ctx *ctx, |
804 | struct nft_flow_rule *flow, | |
805 | const struct nft_expr *expr); | |
806 | u32 offload_flags; | |
ef1f7df9 | 807 | const struct nft_expr_type *type; |
0ca743a5 | 808 | void *data; |
96518518 PM |
809 | }; |
810 | ||
ef1f7df9 | 811 | #define NFT_EXPR_MAXATTR 16 |
96518518 PM |
812 | #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ |
813 | ALIGN(size, __alignof__(struct nft_expr))) | |
814 | ||
815 | /** | |
816 | * struct nft_expr - nf_tables expression | |
817 | * | |
818 | * @ops: expression ops | |
819 | * @data: expression private data | |
820 | */ | |
821 | struct nft_expr { | |
822 | const struct nft_expr_ops *ops; | |
823 | unsigned char data[]; | |
824 | }; | |
825 | ||
826 | static inline void *nft_expr_priv(const struct nft_expr *expr) | |
827 | { | |
828 | return (void *)expr->data; | |
829 | } | |
830 | ||
0b2d8a7b PM |
831 | struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, |
832 | const struct nlattr *nla); | |
833 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); | |
834 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, | |
835 | const struct nft_expr *expr); | |
836 | ||
96518518 PM |
837 | /** |
838 | * struct nft_rule - nf_tables rule | |
839 | * | |
840 | * @list: used internally | |
96518518 | 841 | * @handle: rule handle |
0628b123 | 842 | * @genmask: generation mask |
96518518 | 843 | * @dlen: length of expression data |
86f1ec32 | 844 | * @udata: user data is appended to the rule |
96518518 PM |
845 | * @data: expression data |
846 | */ | |
847 | struct nft_rule { | |
848 | struct list_head list; | |
0768b3b3 | 849 | u64 handle:42, |
0628b123 | 850 | genmask:2, |
0768b3b3 | 851 | dlen:12, |
86f1ec32 | 852 | udata:1; |
96518518 PM |
853 | unsigned char data[] |
854 | __attribute__((aligned(__alignof__(struct nft_expr)))); | |
855 | }; | |
856 | ||
857 | static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) | |
858 | { | |
859 | return (struct nft_expr *)&rule->data[0]; | |
860 | } | |
861 | ||
862 | static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) | |
863 | { | |
864 | return ((void *)expr) + expr->ops->size; | |
865 | } | |
866 | ||
867 | static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) | |
868 | { | |
869 | return (struct nft_expr *)&rule->data[rule->dlen]; | |
870 | } | |
871 | ||
86f1ec32 | 872 | static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) |
0768b3b3 PNA |
873 | { |
874 | return (void *)&rule->data[rule->dlen]; | |
875 | } | |
876 | ||
96518518 PM |
877 | /* |
878 | * The last pointer isn't really necessary, but the compiler isn't able to | |
879 | * determine that the result of nft_expr_last() is always the same since it | |
880 | * can't assume that the dlen value wasn't changed within calls in the loop. | |
881 | */ | |
882 | #define nft_rule_for_each_expr(expr, last, rule) \ | |
883 | for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ | |
884 | (expr) != (last); \ | |
885 | (expr) = nft_expr_next(expr)) | |
886 | ||
887 | enum nft_chain_flags { | |
888 | NFT_BASE_CHAIN = 0x1, | |
c9626a2c | 889 | NFT_CHAIN_HW_OFFLOAD = 0x2, |
96518518 PM |
890 | }; |
891 | ||
ad652f38 PNA |
892 | #define NFT_CHAIN_POLICY_UNSET U8_MAX |
893 | ||
96518518 PM |
894 | /** |
895 | * struct nft_chain - nf_tables chain | |
896 | * | |
897 | * @rules: list of rules in the chain | |
898 | * @list: used internally | |
1b2470e5 | 899 | * @rhlhead: used internally |
b5bc89bf | 900 | * @table: table that this chain belongs to |
96518518 | 901 | * @handle: chain handle |
96518518 | 902 | * @use: number of jump references to this chain |
a0a7379e | 903 | * @flags: bitmask of enum nft_chain_flags |
96518518 PM |
904 | * @name: name of the chain |
905 | */ | |
906 | struct nft_chain { | |
0cbc06b3 FW |
907 | struct nft_rule *__rcu *rules_gen_0; |
908 | struct nft_rule *__rcu *rules_gen_1; | |
96518518 PM |
909 | struct list_head rules; |
910 | struct list_head list; | |
1b2470e5 | 911 | struct rhlist_head rhlhead; |
b5bc89bf | 912 | struct nft_table *table; |
96518518 | 913 | u64 handle; |
a0a7379e | 914 | u32 use; |
664b0f8c PNA |
915 | u8 flags:6, |
916 | genmask:2; | |
b7263e07 | 917 | char *name; |
0cbc06b3 FW |
918 | |
919 | /* Only used during control plane commit phase: */ | |
920 | struct nft_rule **rules_next; | |
96518518 PM |
921 | }; |
922 | ||
a654de8f PNA |
923 | int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain); |
924 | ||
32537e91 | 925 | enum nft_chain_types { |
9370761c PNA |
926 | NFT_CHAIN_T_DEFAULT = 0, |
927 | NFT_CHAIN_T_ROUTE, | |
928 | NFT_CHAIN_T_NAT, | |
929 | NFT_CHAIN_T_MAX | |
930 | }; | |
931 | ||
1a1e1a12 | 932 | /** |
32537e91 | 933 | * struct nft_chain_type - nf_tables chain type info |
1a1e1a12 PM |
934 | * |
935 | * @name: name of the type | |
936 | * @type: numeric identifier | |
937 | * @family: address family | |
938 | * @owner: module owner | |
939 | * @hook_mask: mask of valid hooks | |
c2f9eafe | 940 | * @hooks: array of hook functions |
4e25ceb8 FW |
941 | * @ops_register: base chain register function |
942 | * @ops_unregister: base chain unregister function | |
1a1e1a12 | 943 | */ |
32537e91 | 944 | struct nft_chain_type { |
1a1e1a12 | 945 | const char *name; |
32537e91 | 946 | enum nft_chain_types type; |
1a1e1a12 PM |
947 | int family; |
948 | struct module *owner; | |
949 | unsigned int hook_mask; | |
950 | nf_hookfn *hooks[NF_MAX_HOOKS]; | |
4e25ceb8 FW |
951 | int (*ops_register)(struct net *net, const struct nf_hook_ops *ops); |
952 | void (*ops_unregister)(struct net *net, const struct nf_hook_ops *ops); | |
1a1e1a12 PM |
953 | }; |
954 | ||
7210e4e3 | 955 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
32537e91 | 956 | enum nft_chain_types type); |
75e8d06d PNA |
957 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
958 | unsigned int hook_flags); | |
7210e4e3 | 959 | |
0ca743a5 | 960 | struct nft_stats { |
ce355e20 ED |
961 | u64 bytes; |
962 | u64 pkts; | |
963 | struct u64_stats_sync syncp; | |
0ca743a5 PNA |
964 | }; |
965 | ||
96518518 PM |
966 | /** |
967 | * struct nft_base_chain - nf_tables base chain | |
968 | * | |
969 | * @ops: netfilter hook ops | |
9370761c | 970 | * @type: chain type |
0ca743a5 PNA |
971 | * @policy: default policy |
972 | * @stats: per-cpu chain stats | |
96518518 | 973 | * @chain: the chain |
2cbce139 | 974 | * @dev_name: device name that this base chain is attached to (if any) |
14bfb13f | 975 | * @flow_block: flow block (for hardware offload) |
96518518 PM |
976 | */ |
977 | struct nft_base_chain { | |
c974a3a3 | 978 | struct nf_hook_ops ops; |
32537e91 | 979 | const struct nft_chain_type *type; |
0ca743a5 | 980 | u8 policy; |
835b8033 | 981 | u8 flags; |
0ca743a5 | 982 | struct nft_stats __percpu *stats; |
96518518 | 983 | struct nft_chain chain; |
2cbce139 | 984 | char dev_name[IFNAMSIZ]; |
14bfb13f | 985 | struct flow_block flow_block; |
96518518 PM |
986 | }; |
987 | ||
988 | static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) | |
989 | { | |
990 | return container_of(chain, struct nft_base_chain, chain); | |
991 | } | |
992 | ||
f323d954 PNA |
993 | static inline bool nft_is_base_chain(const struct nft_chain *chain) |
994 | { | |
995 | return chain->flags & NFT_BASE_CHAIN; | |
996 | } | |
997 | ||
5ebe0b0e | 998 | int __nft_release_basechain(struct nft_ctx *ctx); |
835b8033 | 999 | |
06198b34 | 1000 | unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); |
96518518 | 1001 | |
96518518 PM |
1002 | /** |
1003 | * struct nft_table - nf_tables table | |
1004 | * | |
1005 | * @list: used internally | |
1b2470e5 FW |
1006 | * @chains_ht: chains in the table |
1007 | * @chains: same, for stable walks | |
96518518 | 1008 | * @sets: sets in the table |
e5009240 | 1009 | * @objects: stateful objects in the table |
3b49e2e9 | 1010 | * @flowtables: flow tables in the table |
96518518 | 1011 | * @hgenerator: handle generator state |
3ecbfd65 | 1012 | * @handle: table handle |
96518518 PM |
1013 | * @use: number of chain references to this table |
1014 | * @flags: table flag (see enum nft_table_flags) | |
f2a6d766 | 1015 | * @genmask: generation mask |
36596dad | 1016 | * @afinfo: address family info |
96518518 PM |
1017 | * @name: name of the table |
1018 | */ | |
1019 | struct nft_table { | |
1020 | struct list_head list; | |
1b2470e5 | 1021 | struct rhltable chains_ht; |
96518518 PM |
1022 | struct list_head chains; |
1023 | struct list_head sets; | |
e5009240 | 1024 | struct list_head objects; |
3b49e2e9 | 1025 | struct list_head flowtables; |
96518518 | 1026 | u64 hgenerator; |
3ecbfd65 | 1027 | u64 handle; |
96518518 | 1028 | u32 use; |
98319cb9 PNA |
1029 | u16 family:6, |
1030 | flags:8, | |
f2a6d766 | 1031 | genmask:2; |
e46abbcc | 1032 | char *name; |
ebddf1a8 PNA |
1033 | }; |
1034 | ||
cc07eeb0 | 1035 | void nft_register_chain_type(const struct nft_chain_type *); |
32537e91 | 1036 | void nft_unregister_chain_type(const struct nft_chain_type *); |
96518518 | 1037 | |
5eccdfaa JP |
1038 | int nft_register_expr(struct nft_expr_type *); |
1039 | void nft_unregister_expr(struct nft_expr_type *); | |
96518518 | 1040 | |
33d5a7b1 FW |
1041 | int nft_verdict_dump(struct sk_buff *skb, int type, |
1042 | const struct nft_verdict *v); | |
1043 | ||
d152159b FW |
1044 | /** |
1045 | * struct nft_object_hash_key - key to lookup nft_object | |
1046 | * | |
1047 | * @name: name of the stateful object to look up | |
1048 | * @table: table the object belongs to | |
1049 | */ | |
1050 | struct nft_object_hash_key { | |
1051 | const char *name; | |
1052 | const struct nft_table *table; | |
1053 | }; | |
1054 | ||
e5009240 PNA |
1055 | /** |
1056 | * struct nft_object - nf_tables stateful object | |
1057 | * | |
1058 | * @list: table stateful object list node | |
d152159b | 1059 | * @key: keys that identify this object |
4d44175a | 1060 | * @rhlhead: nft_objname_ht node |
e5009240 PNA |
1061 | * @genmask: generation mask |
1062 | * @use: number of references to this stateful object | |
3ecbfd65 | 1063 | * @handle: unique object handle |
dfc46034 | 1064 | * @ops: object operations |
4d44175a | 1065 | * @data: object data, layout depends on type |
e5009240 PNA |
1066 | */ |
1067 | struct nft_object { | |
1068 | struct list_head list; | |
4d44175a | 1069 | struct rhlist_head rhlhead; |
d152159b | 1070 | struct nft_object_hash_key key; |
e5009240 PNA |
1071 | u32 genmask:2, |
1072 | use:30; | |
3ecbfd65 | 1073 | u64 handle; |
e5009240 | 1074 | /* runtime data below here */ |
dfc46034 | 1075 | const struct nft_object_ops *ops ____cacheline_aligned; |
e5009240 PNA |
1076 | unsigned char data[] |
1077 | __attribute__((aligned(__alignof__(u64)))); | |
1078 | }; | |
1079 | ||
1080 | static inline void *nft_obj_data(const struct nft_object *obj) | |
1081 | { | |
1082 | return (void *)obj->data; | |
1083 | } | |
1084 | ||
1085 | #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) | |
1086 | ||
4d44175a FW |
1087 | struct nft_object *nft_obj_lookup(const struct net *net, |
1088 | const struct nft_table *table, | |
cac20fcd PNA |
1089 | const struct nlattr *nla, u32 objtype, |
1090 | u8 genmask); | |
e5009240 | 1091 | |
d152159b | 1092 | void nft_obj_notify(struct net *net, const struct nft_table *table, |
25e94a99 PNA |
1093 | struct nft_object *obj, u32 portid, u32 seq, |
1094 | int event, int family, int report, gfp_t gfp); | |
2599e989 | 1095 | |
e5009240 PNA |
1096 | /** |
1097 | * struct nft_object_type - stateful object type | |
1098 | * | |
dfc46034 PBG |
1099 | * @select_ops: function to select nft_object_ops |
1100 | * @ops: default ops, used when no select_ops functions is present | |
e5009240 PNA |
1101 | * @list: list node in list of object types |
1102 | * @type: stateful object numeric type | |
e5009240 PNA |
1103 | * @owner: module owner |
1104 | * @maxattr: maximum netlink attribute | |
1105 | * @policy: netlink attribute policy | |
dfc46034 PBG |
1106 | */ |
1107 | struct nft_object_type { | |
1108 | const struct nft_object_ops *(*select_ops)(const struct nft_ctx *, | |
1109 | const struct nlattr * const tb[]); | |
1110 | const struct nft_object_ops *ops; | |
1111 | struct list_head list; | |
1112 | u32 type; | |
1113 | unsigned int maxattr; | |
1114 | struct module *owner; | |
1115 | const struct nla_policy *policy; | |
1116 | }; | |
1117 | ||
1118 | /** | |
1119 | * struct nft_object_ops - stateful object operations | |
1120 | * | |
1121 | * @eval: stateful object evaluation function | |
1122 | * @size: stateful object size | |
e5009240 PNA |
1123 | * @init: initialize object from netlink attributes |
1124 | * @destroy: release existing stateful object | |
1125 | * @dump: netlink dump stateful object | |
d62d0ba9 | 1126 | * @update: update stateful object |
e5009240 | 1127 | */ |
dfc46034 | 1128 | struct nft_object_ops { |
e5009240 PNA |
1129 | void (*eval)(struct nft_object *obj, |
1130 | struct nft_regs *regs, | |
1131 | const struct nft_pktinfo *pkt); | |
e5009240 | 1132 | unsigned int size; |
84fba055 FW |
1133 | int (*init)(const struct nft_ctx *ctx, |
1134 | const struct nlattr *const tb[], | |
e5009240 | 1135 | struct nft_object *obj); |
00bfb320 PNA |
1136 | void (*destroy)(const struct nft_ctx *ctx, |
1137 | struct nft_object *obj); | |
e5009240 | 1138 | int (*dump)(struct sk_buff *skb, |
43da04a5 PNA |
1139 | struct nft_object *obj, |
1140 | bool reset); | |
d62d0ba9 FFM |
1141 | void (*update)(struct nft_object *obj, |
1142 | struct nft_object *newobj); | |
dfc46034 | 1143 | const struct nft_object_type *type; |
e5009240 PNA |
1144 | }; |
1145 | ||
1146 | int nft_register_obj(struct nft_object_type *obj_type); | |
1147 | void nft_unregister_obj(struct nft_object_type *obj_type); | |
1148 | ||
d92191aa PNA |
1149 | #define NFT_FLOWTABLE_DEVICE_MAX 8 |
1150 | ||
3b49e2e9 PNA |
1151 | /** |
1152 | * struct nft_flowtable - nf_tables flow table | |
1153 | * | |
1154 | * @list: flow table list node in table list | |
1155 | * @table: the table the flow table is contained in | |
1156 | * @name: name of this flow table | |
1157 | * @hooknum: hook number | |
1158 | * @priority: hook priority | |
1159 | * @ops_len: number of hooks in array | |
1160 | * @genmask: generation mask | |
1161 | * @use: number of references to this flow table | |
3ecbfd65 | 1162 | * @handle: unique object handle |
d92191aa | 1163 | * @dev_name: array of device names |
3b49e2e9 PNA |
1164 | * @data: rhashtable and garbage collector |
1165 | * @ops: array of hooks | |
1166 | */ | |
1167 | struct nft_flowtable { | |
1168 | struct list_head list; | |
1169 | struct nft_table *table; | |
1170 | char *name; | |
1171 | int hooknum; | |
1172 | int priority; | |
1173 | int ops_len; | |
1174 | u32 genmask:2, | |
1175 | use:30; | |
3ecbfd65 | 1176 | u64 handle; |
3b49e2e9 PNA |
1177 | /* runtime data below here */ |
1178 | struct nf_hook_ops *ops ____cacheline_aligned; | |
1179 | struct nf_flowtable data; | |
1180 | }; | |
1181 | ||
cac20fcd PNA |
1182 | struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table, |
1183 | const struct nlattr *nla, | |
1184 | u8 genmask); | |
3b49e2e9 PNA |
1185 | |
1186 | void nft_register_flowtable_type(struct nf_flowtable_type *type); | |
1187 | void nft_unregister_flowtable_type(struct nf_flowtable_type *type); | |
1188 | ||
33d5a7b1 FW |
1189 | /** |
1190 | * struct nft_traceinfo - nft tracing information and state | |
1191 | * | |
1192 | * @pkt: pktinfo currently processed | |
1193 | * @basechain: base chain currently processed | |
1194 | * @chain: chain currently processed | |
1195 | * @rule: rule that was evaluated | |
1196 | * @verdict: verdict given by rule | |
1197 | * @type: event type (enum nft_trace_types) | |
1198 | * @packet_dumped: packet headers sent in a previous traceinfo message | |
1199 | * @trace: other struct members are initialised | |
1200 | */ | |
1201 | struct nft_traceinfo { | |
1202 | const struct nft_pktinfo *pkt; | |
1203 | const struct nft_base_chain *basechain; | |
1204 | const struct nft_chain *chain; | |
1205 | const struct nft_rule *rule; | |
1206 | const struct nft_verdict *verdict; | |
1207 | enum nft_trace_types type; | |
1208 | bool packet_dumped; | |
1209 | bool trace; | |
1210 | }; | |
1211 | ||
1212 | void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, | |
1213 | const struct nft_verdict *verdict, | |
1214 | const struct nft_chain *basechain); | |
1215 | ||
1216 | void nft_trace_notify(struct nft_traceinfo *info); | |
1217 | ||
9370761c PNA |
1218 | #define MODULE_ALIAS_NFT_CHAIN(family, name) \ |
1219 | MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) | |
96518518 | 1220 | |
64d46806 PM |
1221 | #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ |
1222 | MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) | |
1223 | ||
96518518 PM |
1224 | #define MODULE_ALIAS_NFT_EXPR(name) \ |
1225 | MODULE_ALIAS("nft-expr-" name) | |
1226 | ||
20a69341 PM |
1227 | #define MODULE_ALIAS_NFT_SET() \ |
1228 | MODULE_ALIAS("nft-set") | |
1229 | ||
e5009240 PNA |
1230 | #define MODULE_ALIAS_NFT_OBJ(type) \ |
1231 | MODULE_ALIAS("nft-obj-" __stringify(type)) | |
1232 | ||
47e640af JS |
1233 | #if IS_ENABLED(CONFIG_NF_TABLES) |
1234 | ||
ea4bd995 PM |
1235 | /* |
1236 | * The gencursor defines two generations, the currently active and the | |
1237 | * next one. Objects contain a bitmask of 2 bits specifying the generations | |
1238 | * they're active in. A set bit means they're inactive in the generation | |
1239 | * represented by that bit. | |
1240 | * | |
1241 | * New objects start out as inactive in the current and active in the | |
1242 | * next generation. When committing the ruleset the bitmask is cleared, | |
1243 | * meaning they're active in all generations. When removing an object, | |
1244 | * it is set inactive in the next generation. After committing the ruleset, | |
1245 | * the objects are removed. | |
1246 | */ | |
1247 | static inline unsigned int nft_gencursor_next(const struct net *net) | |
1248 | { | |
1249 | return net->nft.gencursor + 1 == 1 ? 1 : 0; | |
1250 | } | |
1251 | ||
1252 | static inline u8 nft_genmask_next(const struct net *net) | |
1253 | { | |
1254 | return 1 << nft_gencursor_next(net); | |
1255 | } | |
1256 | ||
1257 | static inline u8 nft_genmask_cur(const struct net *net) | |
1258 | { | |
14cd5d4a MR |
1259 | /* Use READ_ONCE() to prevent refetching the value for atomicity */ |
1260 | return 1 << READ_ONCE(net->nft.gencursor); | |
ea4bd995 PM |
1261 | } |
1262 | ||
22fe54d5 PM |
1263 | #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) |
1264 | ||
889f7ee7 PNA |
1265 | /* |
1266 | * Generic transaction helpers | |
1267 | */ | |
1268 | ||
1269 | /* Check if this object is currently active. */ | |
1270 | #define nft_is_active(__net, __obj) \ | |
1271 | (((__obj)->genmask & nft_genmask_cur(__net)) == 0) | |
1272 | ||
1273 | /* Check if this object is active in the next generation. */ | |
1274 | #define nft_is_active_next(__net, __obj) \ | |
1275 | (((__obj)->genmask & nft_genmask_next(__net)) == 0) | |
1276 | ||
1277 | /* This object becomes active in the next generation. */ | |
1278 | #define nft_activate_next(__net, __obj) \ | |
1279 | (__obj)->genmask = nft_genmask_cur(__net) | |
1280 | ||
1281 | /* This object becomes inactive in the next generation. */ | |
1282 | #define nft_deactivate_next(__net, __obj) \ | |
1283 | (__obj)->genmask = nft_genmask_next(__net) | |
1284 | ||
1285 | /* After committing the ruleset, clear the stale generation bit. */ | |
1286 | #define nft_clear(__net, __obj) \ | |
1287 | (__obj)->genmask &= ~nft_genmask_next(__net) | |
f2a6d766 PNA |
1288 | #define nft_active_genmask(__obj, __genmask) \ |
1289 | !((__obj)->genmask & __genmask) | |
889f7ee7 | 1290 | |
cc02e457 PM |
1291 | /* |
1292 | * Set element transaction helpers | |
1293 | */ | |
1294 | ||
1295 | static inline bool nft_set_elem_active(const struct nft_set_ext *ext, | |
1296 | u8 genmask) | |
1297 | { | |
1298 | return !(ext->genmask & genmask); | |
1299 | } | |
1300 | ||
42a55769 PNA |
1301 | static inline void nft_set_elem_change_active(const struct net *net, |
1302 | const struct nft_set *set, | |
cc02e457 PM |
1303 | struct nft_set_ext *ext) |
1304 | { | |
42a55769 | 1305 | ext->genmask ^= nft_genmask_next(net); |
cc02e457 PM |
1306 | } |
1307 | ||
47e640af JS |
1308 | #endif /* IS_ENABLED(CONFIG_NF_TABLES) */ |
1309 | ||
69086658 PM |
1310 | /* |
1311 | * We use a free bit in the genmask field to indicate the element | |
1312 | * is busy, meaning it is currently being processed either by | |
1313 | * the netlink API or GC. | |
1314 | * | |
1315 | * Even though the genmask is only a single byte wide, this works | |
1316 | * because the extension structure if fully constant once initialized, | |
1317 | * so there are no non-atomic write accesses unless it is already | |
1318 | * marked busy. | |
1319 | */ | |
1320 | #define NFT_SET_ELEM_BUSY_MASK (1 << 2) | |
1321 | ||
1322 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
1323 | #define NFT_SET_ELEM_BUSY_BIT 2 | |
1324 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
1325 | #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) | |
1326 | #else | |
1327 | #error | |
1328 | #endif | |
1329 | ||
1330 | static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) | |
1331 | { | |
1332 | unsigned long *word = (unsigned long *)ext; | |
1333 | ||
1334 | BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); | |
1335 | return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1336 | } | |
1337 | ||
1338 | static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) | |
1339 | { | |
1340 | unsigned long *word = (unsigned long *)ext; | |
1341 | ||
1342 | clear_bit(NFT_SET_ELEM_BUSY_BIT, word); | |
1343 | } | |
1344 | ||
1a1e1a12 PM |
1345 | /** |
1346 | * struct nft_trans - nf_tables object update in transaction | |
1347 | * | |
1348 | * @list: used internally | |
1349 | * @msg_type: message type | |
0935d558 | 1350 | * @put_net: ctx->net needs to be put |
1a1e1a12 PM |
1351 | * @ctx: transaction context |
1352 | * @data: internal information related to the transaction | |
1353 | */ | |
1354 | struct nft_trans { | |
1355 | struct list_head list; | |
1356 | int msg_type; | |
0935d558 | 1357 | bool put_net; |
1a1e1a12 PM |
1358 | struct nft_ctx ctx; |
1359 | char data[0]; | |
1360 | }; | |
1361 | ||
1362 | struct nft_trans_rule { | |
1363 | struct nft_rule *rule; | |
c9626a2c | 1364 | struct nft_flow_rule *flow; |
1a94e38d | 1365 | u32 rule_id; |
1a1e1a12 PM |
1366 | }; |
1367 | ||
1368 | #define nft_trans_rule(trans) \ | |
1369 | (((struct nft_trans_rule *)trans->data)->rule) | |
c9626a2c PNA |
1370 | #define nft_trans_flow_rule(trans) \ |
1371 | (((struct nft_trans_rule *)trans->data)->flow) | |
1a94e38d PNA |
1372 | #define nft_trans_rule_id(trans) \ |
1373 | (((struct nft_trans_rule *)trans->data)->rule_id) | |
1a1e1a12 PM |
1374 | |
1375 | struct nft_trans_set { | |
1376 | struct nft_set *set; | |
1377 | u32 set_id; | |
6a0a8d10 | 1378 | bool bound; |
1a1e1a12 PM |
1379 | }; |
1380 | ||
1381 | #define nft_trans_set(trans) \ | |
1382 | (((struct nft_trans_set *)trans->data)->set) | |
1383 | #define nft_trans_set_id(trans) \ | |
1384 | (((struct nft_trans_set *)trans->data)->set_id) | |
6a0a8d10 PNA |
1385 | #define nft_trans_set_bound(trans) \ |
1386 | (((struct nft_trans_set *)trans->data)->bound) | |
1a1e1a12 PM |
1387 | |
1388 | struct nft_trans_chain { | |
1389 | bool update; | |
b7263e07 | 1390 | char *name; |
1a1e1a12 PM |
1391 | struct nft_stats __percpu *stats; |
1392 | u8 policy; | |
1393 | }; | |
1394 | ||
1395 | #define nft_trans_chain_update(trans) \ | |
1396 | (((struct nft_trans_chain *)trans->data)->update) | |
1397 | #define nft_trans_chain_name(trans) \ | |
1398 | (((struct nft_trans_chain *)trans->data)->name) | |
1399 | #define nft_trans_chain_stats(trans) \ | |
1400 | (((struct nft_trans_chain *)trans->data)->stats) | |
1401 | #define nft_trans_chain_policy(trans) \ | |
1402 | (((struct nft_trans_chain *)trans->data)->policy) | |
1403 | ||
1404 | struct nft_trans_table { | |
1405 | bool update; | |
1406 | bool enable; | |
1407 | }; | |
1408 | ||
1409 | #define nft_trans_table_update(trans) \ | |
1410 | (((struct nft_trans_table *)trans->data)->update) | |
1411 | #define nft_trans_table_enable(trans) \ | |
1412 | (((struct nft_trans_table *)trans->data)->enable) | |
1413 | ||
1414 | struct nft_trans_elem { | |
1415 | struct nft_set *set; | |
1416 | struct nft_set_elem elem; | |
6a0a8d10 | 1417 | bool bound; |
1a1e1a12 PM |
1418 | }; |
1419 | ||
1420 | #define nft_trans_elem_set(trans) \ | |
1421 | (((struct nft_trans_elem *)trans->data)->set) | |
1422 | #define nft_trans_elem(trans) \ | |
1423 | (((struct nft_trans_elem *)trans->data)->elem) | |
6a0a8d10 PNA |
1424 | #define nft_trans_elem_set_bound(trans) \ |
1425 | (((struct nft_trans_elem *)trans->data)->bound) | |
1a1e1a12 | 1426 | |
e5009240 PNA |
1427 | struct nft_trans_obj { |
1428 | struct nft_object *obj; | |
d62d0ba9 FFM |
1429 | struct nft_object *newobj; |
1430 | bool update; | |
e5009240 PNA |
1431 | }; |
1432 | ||
1433 | #define nft_trans_obj(trans) \ | |
1434 | (((struct nft_trans_obj *)trans->data)->obj) | |
d62d0ba9 FFM |
1435 | #define nft_trans_obj_newobj(trans) \ |
1436 | (((struct nft_trans_obj *)trans->data)->newobj) | |
1437 | #define nft_trans_obj_update(trans) \ | |
1438 | (((struct nft_trans_obj *)trans->data)->update) | |
e5009240 | 1439 | |
3b49e2e9 PNA |
1440 | struct nft_trans_flowtable { |
1441 | struct nft_flowtable *flowtable; | |
1442 | }; | |
1443 | ||
1444 | #define nft_trans_flowtable(trans) \ | |
1445 | (((struct nft_trans_flowtable *)trans->data)->flowtable) | |
1446 | ||
02c7b25e | 1447 | int __init nft_chain_filter_init(void); |
d209df3e | 1448 | void nft_chain_filter_fini(void); |
02c7b25e | 1449 | |
c1deb065 FW |
1450 | void __init nft_chain_route_init(void); |
1451 | void nft_chain_route_fini(void); | |
96518518 | 1452 | #endif /* _NET_NF_TABLES_H */ |