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Commit | Line | Data |
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96518518 | 1 | /* |
20a69341 | 2 | * Copyright (c) 2007-2009 Patrick McHardy <kaber@trash.net> |
96518518 PM |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * Development of this code funded by Astaro AG (http://www.astaro.com/) | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/netlink.h> | |
1ff75a3e | 16 | #include <linux/vmalloc.h> |
96518518 PM |
17 | #include <linux/netfilter.h> |
18 | #include <linux/netfilter/nfnetlink.h> | |
19 | #include <linux/netfilter/nf_tables.h> | |
3b49e2e9 | 20 | #include <net/netfilter/nf_flow_table.h> |
96518518 PM |
21 | #include <net/netfilter/nf_tables_core.h> |
22 | #include <net/netfilter/nf_tables.h> | |
99633ab2 | 23 | #include <net/net_namespace.h> |
96518518 PM |
24 | #include <net/sock.h> |
25 | ||
96518518 | 26 | static LIST_HEAD(nf_tables_expressions); |
e5009240 | 27 | static LIST_HEAD(nf_tables_objects); |
3b49e2e9 | 28 | static LIST_HEAD(nf_tables_flowtables); |
3ecbfd65 | 29 | static u64 table_handle; |
96518518 | 30 | |
7c95f6d8 | 31 | static void nft_ctx_init(struct nft_ctx *ctx, |
633c9a84 | 32 | struct net *net, |
7c95f6d8 PNA |
33 | const struct sk_buff *skb, |
34 | const struct nlmsghdr *nlh, | |
36596dad | 35 | u8 family, |
7c95f6d8 PNA |
36 | struct nft_table *table, |
37 | struct nft_chain *chain, | |
38 | const struct nlattr * const *nla) | |
39 | { | |
633c9a84 | 40 | ctx->net = net; |
36596dad | 41 | ctx->family = family; |
128ad332 PNA |
42 | ctx->table = table; |
43 | ctx->chain = chain; | |
44 | ctx->nla = nla; | |
45 | ctx->portid = NETLINK_CB(skb).portid; | |
46 | ctx->report = nlmsg_report(nlh); | |
47 | ctx->seq = nlh->nlmsg_seq; | |
7c95f6d8 PNA |
48 | } |
49 | ||
8411b644 PNA |
50 | static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx, |
51 | int msg_type, u32 size, gfp_t gfp) | |
1081d11b PNA |
52 | { |
53 | struct nft_trans *trans; | |
54 | ||
8411b644 | 55 | trans = kzalloc(sizeof(struct nft_trans) + size, gfp); |
1081d11b PNA |
56 | if (trans == NULL) |
57 | return NULL; | |
58 | ||
b380e5c7 | 59 | trans->msg_type = msg_type; |
1081d11b PNA |
60 | trans->ctx = *ctx; |
61 | ||
62 | return trans; | |
63 | } | |
64 | ||
8411b644 PNA |
65 | static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx, |
66 | int msg_type, u32 size) | |
67 | { | |
68 | return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL); | |
69 | } | |
70 | ||
1081d11b PNA |
71 | static void nft_trans_destroy(struct nft_trans *trans) |
72 | { | |
73 | list_del(&trans->list); | |
74 | kfree(trans); | |
75 | } | |
76 | ||
ae6153b5 FW |
77 | /* removal requests are queued in the commit_list, but not acted upon |
78 | * until after all new rules are in place. | |
79 | * | |
80 | * Therefore, nf_register_net_hook(net, &nat_hook) runs before pending | |
81 | * nf_unregister_net_hook(). | |
82 | * | |
83 | * nf_register_net_hook thus fails if a nat hook is already in place | |
84 | * even if the conflicting hook is about to be removed. | |
85 | * | |
86 | * If collision is detected, search commit_log for DELCHAIN matching | |
87 | * the new nat hooknum; if we find one collision is temporary: | |
88 | * | |
89 | * Either transaction is aborted (new/colliding hook is removed), or | |
90 | * transaction is committed (old hook is removed). | |
91 | */ | |
92 | static bool nf_tables_allow_nat_conflict(const struct net *net, | |
93 | const struct nf_hook_ops *ops) | |
94 | { | |
95 | const struct nft_trans *trans; | |
96 | bool ret = false; | |
97 | ||
98 | if (!ops->nat_hook) | |
99 | return false; | |
100 | ||
101 | list_for_each_entry(trans, &net->nft.commit_list, list) { | |
102 | const struct nf_hook_ops *pending_ops; | |
103 | const struct nft_chain *pending; | |
104 | ||
105 | if (trans->msg_type != NFT_MSG_NEWCHAIN && | |
106 | trans->msg_type != NFT_MSG_DELCHAIN) | |
107 | continue; | |
108 | ||
109 | pending = trans->ctx.chain; | |
110 | if (!nft_is_base_chain(pending)) | |
111 | continue; | |
112 | ||
113 | pending_ops = &nft_base_chain(pending)->ops; | |
114 | if (pending_ops->nat_hook && | |
115 | pending_ops->pf == ops->pf && | |
116 | pending_ops->hooknum == ops->hooknum) { | |
117 | /* other hook registration already pending? */ | |
118 | if (trans->msg_type == NFT_MSG_NEWCHAIN) | |
119 | return false; | |
120 | ||
121 | ret = true; | |
122 | } | |
123 | } | |
124 | ||
125 | return ret; | |
126 | } | |
127 | ||
c974a3a3 PNA |
128 | static int nf_tables_register_hook(struct net *net, |
129 | const struct nft_table *table, | |
130 | struct nft_chain *chain) | |
d8ee8f7c | 131 | { |
ae6153b5 FW |
132 | struct nf_hook_ops *ops; |
133 | int ret; | |
134 | ||
d8ee8f7c | 135 | if (table->flags & NFT_TABLE_F_DORMANT || |
f323d954 | 136 | !nft_is_base_chain(chain)) |
d8ee8f7c PNA |
137 | return 0; |
138 | ||
ae6153b5 FW |
139 | ops = &nft_base_chain(chain)->ops; |
140 | ret = nf_register_net_hook(net, ops); | |
141 | if (ret == -EBUSY && nf_tables_allow_nat_conflict(net, ops)) { | |
142 | ops->nat_hook = false; | |
143 | ret = nf_register_net_hook(net, ops); | |
144 | ops->nat_hook = true; | |
145 | } | |
146 | ||
147 | return ret; | |
d8ee8f7c PNA |
148 | } |
149 | ||
c974a3a3 PNA |
150 | static void nf_tables_unregister_hook(struct net *net, |
151 | const struct nft_table *table, | |
152 | struct nft_chain *chain) | |
c5598794 | 153 | { |
d8ee8f7c | 154 | if (table->flags & NFT_TABLE_F_DORMANT || |
f323d954 | 155 | !nft_is_base_chain(chain)) |
d8ee8f7c PNA |
156 | return; |
157 | ||
c974a3a3 | 158 | nf_unregister_net_hook(net, &nft_base_chain(chain)->ops); |
c5598794 AB |
159 | } |
160 | ||
ee01d542 AB |
161 | static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type) |
162 | { | |
163 | struct nft_trans *trans; | |
164 | ||
165 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table)); | |
166 | if (trans == NULL) | |
167 | return -ENOMEM; | |
168 | ||
169 | if (msg_type == NFT_MSG_NEWTABLE) | |
f2a6d766 | 170 | nft_activate_next(ctx->net, ctx->table); |
ee01d542 AB |
171 | |
172 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static int nft_deltable(struct nft_ctx *ctx) | |
177 | { | |
178 | int err; | |
179 | ||
180 | err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE); | |
181 | if (err < 0) | |
182 | return err; | |
183 | ||
f2a6d766 | 184 | nft_deactivate_next(ctx->net, ctx->table); |
ee01d542 AB |
185 | return err; |
186 | } | |
187 | ||
188 | static int nft_trans_chain_add(struct nft_ctx *ctx, int msg_type) | |
189 | { | |
190 | struct nft_trans *trans; | |
191 | ||
192 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain)); | |
193 | if (trans == NULL) | |
194 | return -ENOMEM; | |
195 | ||
196 | if (msg_type == NFT_MSG_NEWCHAIN) | |
664b0f8c | 197 | nft_activate_next(ctx->net, ctx->chain); |
ee01d542 AB |
198 | |
199 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static int nft_delchain(struct nft_ctx *ctx) | |
204 | { | |
205 | int err; | |
206 | ||
207 | err = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN); | |
208 | if (err < 0) | |
209 | return err; | |
210 | ||
211 | ctx->table->use--; | |
664b0f8c | 212 | nft_deactivate_next(ctx->net, ctx->chain); |
ee01d542 AB |
213 | |
214 | return err; | |
215 | } | |
216 | ||
ee01d542 AB |
217 | static int |
218 | nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule) | |
219 | { | |
220 | /* You cannot delete the same rule twice */ | |
889f7ee7 PNA |
221 | if (nft_is_active_next(ctx->net, rule)) { |
222 | nft_deactivate_next(ctx->net, rule); | |
ee01d542 AB |
223 | ctx->chain->use--; |
224 | return 0; | |
225 | } | |
226 | return -ENOENT; | |
227 | } | |
228 | ||
229 | static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type, | |
230 | struct nft_rule *rule) | |
231 | { | |
232 | struct nft_trans *trans; | |
233 | ||
234 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule)); | |
235 | if (trans == NULL) | |
236 | return NULL; | |
237 | ||
1a94e38d PNA |
238 | if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) { |
239 | nft_trans_rule_id(trans) = | |
240 | ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID])); | |
241 | } | |
ee01d542 AB |
242 | nft_trans_rule(trans) = rule; |
243 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
244 | ||
245 | return trans; | |
246 | } | |
247 | ||
248 | static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule) | |
249 | { | |
250 | struct nft_trans *trans; | |
251 | int err; | |
252 | ||
253 | trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule); | |
254 | if (trans == NULL) | |
255 | return -ENOMEM; | |
256 | ||
257 | err = nf_tables_delrule_deactivate(ctx, rule); | |
258 | if (err < 0) { | |
259 | nft_trans_destroy(trans); | |
260 | return err; | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static int nft_delrule_by_chain(struct nft_ctx *ctx) | |
267 | { | |
268 | struct nft_rule *rule; | |
269 | int err; | |
270 | ||
271 | list_for_each_entry(rule, &ctx->chain->rules, list) { | |
272 | err = nft_delrule(ctx, rule); | |
273 | if (err < 0) | |
274 | return err; | |
275 | } | |
276 | return 0; | |
277 | } | |
278 | ||
ee01d542 AB |
279 | static int nft_trans_set_add(struct nft_ctx *ctx, int msg_type, |
280 | struct nft_set *set) | |
281 | { | |
282 | struct nft_trans *trans; | |
283 | ||
284 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set)); | |
285 | if (trans == NULL) | |
286 | return -ENOMEM; | |
287 | ||
288 | if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] != NULL) { | |
289 | nft_trans_set_id(trans) = | |
290 | ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID])); | |
37a9cc52 | 291 | nft_activate_next(ctx->net, set); |
ee01d542 AB |
292 | } |
293 | nft_trans_set(trans) = set; | |
294 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | static int nft_delset(struct nft_ctx *ctx, struct nft_set *set) | |
300 | { | |
301 | int err; | |
302 | ||
303 | err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set); | |
304 | if (err < 0) | |
305 | return err; | |
306 | ||
37a9cc52 | 307 | nft_deactivate_next(ctx->net, set); |
ee01d542 AB |
308 | ctx->table->use--; |
309 | ||
310 | return err; | |
311 | } | |
312 | ||
e5009240 PNA |
313 | static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type, |
314 | struct nft_object *obj) | |
315 | { | |
316 | struct nft_trans *trans; | |
317 | ||
318 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj)); | |
319 | if (trans == NULL) | |
320 | return -ENOMEM; | |
321 | ||
322 | if (msg_type == NFT_MSG_NEWOBJ) | |
323 | nft_activate_next(ctx->net, obj); | |
324 | ||
325 | nft_trans_obj(trans) = obj; | |
326 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
331 | static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj) | |
332 | { | |
333 | int err; | |
334 | ||
335 | err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj); | |
336 | if (err < 0) | |
337 | return err; | |
338 | ||
339 | nft_deactivate_next(ctx->net, obj); | |
340 | ctx->table->use--; | |
341 | ||
342 | return err; | |
343 | } | |
344 | ||
3b49e2e9 PNA |
345 | static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type, |
346 | struct nft_flowtable *flowtable) | |
347 | { | |
348 | struct nft_trans *trans; | |
349 | ||
350 | trans = nft_trans_alloc(ctx, msg_type, | |
351 | sizeof(struct nft_trans_flowtable)); | |
352 | if (trans == NULL) | |
353 | return -ENOMEM; | |
354 | ||
355 | if (msg_type == NFT_MSG_NEWFLOWTABLE) | |
356 | nft_activate_next(ctx->net, flowtable); | |
357 | ||
358 | nft_trans_flowtable(trans) = flowtable; | |
359 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int nft_delflowtable(struct nft_ctx *ctx, | |
365 | struct nft_flowtable *flowtable) | |
366 | { | |
367 | int err; | |
368 | ||
369 | err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable); | |
370 | if (err < 0) | |
371 | return err; | |
372 | ||
373 | nft_deactivate_next(ctx->net, flowtable); | |
374 | ctx->table->use--; | |
375 | ||
376 | return err; | |
377 | } | |
378 | ||
96518518 PM |
379 | /* |
380 | * Tables | |
381 | */ | |
382 | ||
36596dad | 383 | static struct nft_table *nft_table_lookup(const struct net *net, |
f2a6d766 | 384 | const struct nlattr *nla, |
36596dad | 385 | u8 family, u8 genmask) |
96518518 PM |
386 | { |
387 | struct nft_table *table; | |
388 | ||
36596dad | 389 | list_for_each_entry(table, &net->nft.tables, list) { |
f2a6d766 | 390 | if (!nla_strcmp(nla, table->name) && |
98319cb9 | 391 | table->family == family && |
f2a6d766 | 392 | nft_active_genmask(table, genmask)) |
96518518 PM |
393 | return table; |
394 | } | |
395 | return NULL; | |
396 | } | |
397 | ||
3ecbfd65 HS |
398 | static struct nft_table *nft_table_lookup_byhandle(const struct net *net, |
399 | const struct nlattr *nla, | |
400 | u8 genmask) | |
401 | { | |
402 | struct nft_table *table; | |
403 | ||
404 | list_for_each_entry(table, &net->nft.tables, list) { | |
405 | if (be64_to_cpu(nla_get_be64(nla)) == table->handle && | |
406 | nft_active_genmask(table, genmask)) | |
407 | return table; | |
408 | } | |
409 | return NULL; | |
410 | } | |
411 | ||
36596dad | 412 | static struct nft_table *nf_tables_table_lookup(const struct net *net, |
f2a6d766 | 413 | const struct nlattr *nla, |
36596dad | 414 | u8 family, u8 genmask) |
96518518 PM |
415 | { |
416 | struct nft_table *table; | |
417 | ||
418 | if (nla == NULL) | |
419 | return ERR_PTR(-EINVAL); | |
420 | ||
36596dad | 421 | table = nft_table_lookup(net, nla, family, genmask); |
96518518 PM |
422 | if (table != NULL) |
423 | return table; | |
424 | ||
96518518 PM |
425 | return ERR_PTR(-ENOENT); |
426 | } | |
427 | ||
3ecbfd65 HS |
428 | static struct nft_table *nf_tables_table_lookup_byhandle(const struct net *net, |
429 | const struct nlattr *nla, | |
430 | u8 genmask) | |
431 | { | |
432 | struct nft_table *table; | |
433 | ||
434 | if (nla == NULL) | |
435 | return ERR_PTR(-EINVAL); | |
436 | ||
437 | table = nft_table_lookup_byhandle(net, nla, genmask); | |
438 | if (table != NULL) | |
439 | return table; | |
440 | ||
441 | return ERR_PTR(-ENOENT); | |
442 | } | |
443 | ||
96518518 PM |
444 | static inline u64 nf_tables_alloc_handle(struct nft_table *table) |
445 | { | |
446 | return ++table->hgenerator; | |
447 | } | |
448 | ||
32537e91 | 449 | static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX]; |
9370761c | 450 | |
32537e91 | 451 | static const struct nft_chain_type * |
1ea26cca | 452 | __nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family) |
9370761c PNA |
453 | { |
454 | int i; | |
455 | ||
baae3e62 | 456 | for (i = 0; i < NFT_CHAIN_T_MAX; i++) { |
9370761c PNA |
457 | if (chain_type[family][i] != NULL && |
458 | !nla_strcmp(nla, chain_type[family][i]->name)) | |
baae3e62 | 459 | return chain_type[family][i]; |
9370761c | 460 | } |
baae3e62 | 461 | return NULL; |
9370761c PNA |
462 | } |
463 | ||
32537e91 | 464 | static const struct nft_chain_type * |
1ea26cca | 465 | nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family, bool autoload) |
9370761c | 466 | { |
32537e91 | 467 | const struct nft_chain_type *type; |
9370761c | 468 | |
1ea26cca | 469 | type = __nf_tables_chain_type_lookup(nla, family); |
93b0806f PM |
470 | if (type != NULL) |
471 | return type; | |
9370761c | 472 | #ifdef CONFIG_MODULES |
93b0806f | 473 | if (autoload) { |
9370761c | 474 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
1ea26cca | 475 | request_module("nft-chain-%u-%.*s", family, |
2fec6bb6 | 476 | nla_len(nla), (const char *)nla_data(nla)); |
9370761c | 477 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
1ea26cca | 478 | type = __nf_tables_chain_type_lookup(nla, family); |
93b0806f PM |
479 | if (type != NULL) |
480 | return ERR_PTR(-EAGAIN); | |
9370761c PNA |
481 | } |
482 | #endif | |
93b0806f | 483 | return ERR_PTR(-ENOENT); |
9370761c PNA |
484 | } |
485 | ||
96518518 | 486 | static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = { |
1cae565e PNA |
487 | [NFTA_TABLE_NAME] = { .type = NLA_STRING, |
488 | .len = NFT_TABLE_MAXNAMELEN - 1 }, | |
9ddf6323 | 489 | [NFTA_TABLE_FLAGS] = { .type = NLA_U32 }, |
3ecbfd65 | 490 | [NFTA_TABLE_HANDLE] = { .type = NLA_U64 }, |
96518518 PM |
491 | }; |
492 | ||
84d7fce6 PNA |
493 | static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net, |
494 | u32 portid, u32 seq, int event, u32 flags, | |
495 | int family, const struct nft_table *table) | |
96518518 PM |
496 | { |
497 | struct nlmsghdr *nlh; | |
498 | struct nfgenmsg *nfmsg; | |
499 | ||
dedb67c4 | 500 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); |
96518518 PM |
501 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
502 | if (nlh == NULL) | |
503 | goto nla_put_failure; | |
504 | ||
505 | nfmsg = nlmsg_data(nlh); | |
506 | nfmsg->nfgen_family = family; | |
507 | nfmsg->version = NFNETLINK_V0; | |
84d7fce6 | 508 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
96518518 | 509 | |
9ddf6323 | 510 | if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) || |
d8bcc768 | 511 | nla_put_be32(skb, NFTA_TABLE_FLAGS, htonl(table->flags)) || |
3ecbfd65 HS |
512 | nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) || |
513 | nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle), | |
514 | NFTA_TABLE_PAD)) | |
96518518 PM |
515 | goto nla_put_failure; |
516 | ||
053c095a JB |
517 | nlmsg_end(skb, nlh); |
518 | return 0; | |
96518518 PM |
519 | |
520 | nla_put_failure: | |
521 | nlmsg_trim(skb, nlh); | |
522 | return -1; | |
523 | } | |
524 | ||
25e94a99 | 525 | static void nf_tables_table_notify(const struct nft_ctx *ctx, int event) |
96518518 PM |
526 | { |
527 | struct sk_buff *skb; | |
96518518 PM |
528 | int err; |
529 | ||
128ad332 PNA |
530 | if (!ctx->report && |
531 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) | |
25e94a99 | 532 | return; |
96518518 | 533 | |
96518518 PM |
534 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
535 | if (skb == NULL) | |
536 | goto err; | |
537 | ||
84d7fce6 | 538 | err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq, |
36596dad | 539 | event, 0, ctx->family, ctx->table); |
96518518 PM |
540 | if (err < 0) { |
541 | kfree_skb(skb); | |
542 | goto err; | |
543 | } | |
544 | ||
25e94a99 PNA |
545 | nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
546 | ctx->report, GFP_KERNEL); | |
547 | return; | |
96518518 | 548 | err: |
25e94a99 | 549 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS); |
96518518 PM |
550 | } |
551 | ||
552 | static int nf_tables_dump_tables(struct sk_buff *skb, | |
553 | struct netlink_callback *cb) | |
554 | { | |
555 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
96518518 PM |
556 | const struct nft_table *table; |
557 | unsigned int idx = 0, s_idx = cb->args[0]; | |
99633ab2 | 558 | struct net *net = sock_net(skb->sk); |
96518518 PM |
559 | int family = nfmsg->nfgen_family; |
560 | ||
e688a7f8 | 561 | rcu_read_lock(); |
38e029f1 PNA |
562 | cb->seq = net->nft.base_seq; |
563 | ||
36596dad | 564 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
98319cb9 | 565 | if (family != NFPROTO_UNSPEC && family != table->family) |
96518518 PM |
566 | continue; |
567 | ||
36596dad PNA |
568 | if (idx < s_idx) |
569 | goto cont; | |
570 | if (idx > s_idx) | |
571 | memset(&cb->args[1], 0, | |
572 | sizeof(cb->args) - sizeof(cb->args[0])); | |
573 | if (!nft_is_active(net, table)) | |
574 | continue; | |
575 | if (nf_tables_fill_table_info(skb, net, | |
576 | NETLINK_CB(cb->skb).portid, | |
577 | cb->nlh->nlmsg_seq, | |
578 | NFT_MSG_NEWTABLE, NLM_F_MULTI, | |
98319cb9 | 579 | table->family, table) < 0) |
36596dad PNA |
580 | goto done; |
581 | ||
582 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
96518518 | 583 | cont: |
36596dad | 584 | idx++; |
96518518 PM |
585 | } |
586 | done: | |
e688a7f8 | 587 | rcu_read_unlock(); |
96518518 PM |
588 | cb->args[0] = idx; |
589 | return skb->len; | |
590 | } | |
591 | ||
7b8002a1 PNA |
592 | static int nf_tables_gettable(struct net *net, struct sock *nlsk, |
593 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
594 | const struct nlattr * const nla[], |
595 | struct netlink_ext_ack *extack) | |
96518518 PM |
596 | { |
597 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 598 | u8 genmask = nft_genmask_cur(net); |
96518518 PM |
599 | const struct nft_table *table; |
600 | struct sk_buff *skb2; | |
601 | int family = nfmsg->nfgen_family; | |
602 | int err; | |
603 | ||
604 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
605 | struct netlink_dump_control c = { | |
606 | .dump = nf_tables_dump_tables, | |
607 | }; | |
608 | return netlink_dump_start(nlsk, skb, nlh, &c); | |
609 | } | |
610 | ||
98319cb9 | 611 | table = nf_tables_table_lookup(net, nla[NFTA_TABLE_NAME], family, |
36596dad | 612 | genmask); |
96518518 PM |
613 | if (IS_ERR(table)) |
614 | return PTR_ERR(table); | |
615 | ||
616 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
617 | if (!skb2) | |
618 | return -ENOMEM; | |
619 | ||
84d7fce6 | 620 | err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid, |
96518518 PM |
621 | nlh->nlmsg_seq, NFT_MSG_NEWTABLE, 0, |
622 | family, table); | |
623 | if (err < 0) | |
624 | goto err; | |
625 | ||
626 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
627 | ||
628 | err: | |
629 | kfree_skb(skb2); | |
630 | return err; | |
631 | } | |
632 | ||
c9c17211 | 633 | static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt) |
10435c11 F |
634 | { |
635 | struct nft_chain *chain; | |
636 | u32 i = 0; | |
637 | ||
638 | list_for_each_entry(chain, &table->chains, list) { | |
639 | if (!nft_is_active_next(net, chain)) | |
640 | continue; | |
f323d954 | 641 | if (!nft_is_base_chain(chain)) |
10435c11 F |
642 | continue; |
643 | ||
644 | if (cnt && i++ == cnt) | |
645 | break; | |
646 | ||
c974a3a3 | 647 | nf_unregister_net_hook(net, &nft_base_chain(chain)->ops); |
10435c11 F |
648 | } |
649 | } | |
650 | ||
c9c17211 | 651 | static int nf_tables_table_enable(struct net *net, struct nft_table *table) |
9ddf6323 PNA |
652 | { |
653 | struct nft_chain *chain; | |
654 | int err, i = 0; | |
655 | ||
656 | list_for_each_entry(chain, &table->chains, list) { | |
664b0f8c PNA |
657 | if (!nft_is_active_next(net, chain)) |
658 | continue; | |
f323d954 | 659 | if (!nft_is_base_chain(chain)) |
d2012975 PNA |
660 | continue; |
661 | ||
c974a3a3 | 662 | err = nf_register_net_hook(net, &nft_base_chain(chain)->ops); |
9ddf6323 PNA |
663 | if (err < 0) |
664 | goto err; | |
665 | ||
666 | i++; | |
667 | } | |
668 | return 0; | |
669 | err: | |
10435c11 | 670 | if (i) |
c9c17211 | 671 | nft_table_disable(net, table, i); |
9ddf6323 PNA |
672 | return err; |
673 | } | |
674 | ||
c9c17211 | 675 | static void nf_tables_table_disable(struct net *net, struct nft_table *table) |
9ddf6323 | 676 | { |
c9c17211 | 677 | nft_table_disable(net, table, 0); |
9ddf6323 PNA |
678 | } |
679 | ||
e1aaca93 | 680 | static int nf_tables_updtable(struct nft_ctx *ctx) |
9ddf6323 | 681 | { |
55dd6f93 | 682 | struct nft_trans *trans; |
e1aaca93 | 683 | u32 flags; |
55dd6f93 | 684 | int ret = 0; |
9ddf6323 | 685 | |
e1aaca93 PNA |
686 | if (!ctx->nla[NFTA_TABLE_FLAGS]) |
687 | return 0; | |
9ddf6323 | 688 | |
e1aaca93 PNA |
689 | flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS])); |
690 | if (flags & ~NFT_TABLE_F_DORMANT) | |
691 | return -EINVAL; | |
692 | ||
63283dd2 PNA |
693 | if (flags == ctx->table->flags) |
694 | return 0; | |
695 | ||
55dd6f93 PNA |
696 | trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE, |
697 | sizeof(struct nft_trans_table)); | |
698 | if (trans == NULL) | |
699 | return -ENOMEM; | |
9ddf6323 | 700 | |
e1aaca93 PNA |
701 | if ((flags & NFT_TABLE_F_DORMANT) && |
702 | !(ctx->table->flags & NFT_TABLE_F_DORMANT)) { | |
55dd6f93 | 703 | nft_trans_table_enable(trans) = false; |
e1aaca93 PNA |
704 | } else if (!(flags & NFT_TABLE_F_DORMANT) && |
705 | ctx->table->flags & NFT_TABLE_F_DORMANT) { | |
c9c17211 | 706 | ret = nf_tables_table_enable(ctx->net, ctx->table); |
55dd6f93 | 707 | if (ret >= 0) { |
e1aaca93 | 708 | ctx->table->flags &= ~NFT_TABLE_F_DORMANT; |
55dd6f93 | 709 | nft_trans_table_enable(trans) = true; |
9ddf6323 | 710 | } |
9ddf6323 | 711 | } |
e1aaca93 PNA |
712 | if (ret < 0) |
713 | goto err; | |
9ddf6323 | 714 | |
55dd6f93 PNA |
715 | nft_trans_table_update(trans) = true; |
716 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
717 | return 0; | |
9ddf6323 | 718 | err: |
55dd6f93 | 719 | nft_trans_destroy(trans); |
9ddf6323 PNA |
720 | return ret; |
721 | } | |
722 | ||
633c9a84 PNA |
723 | static int nf_tables_newtable(struct net *net, struct sock *nlsk, |
724 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
725 | const struct nlattr * const nla[], |
726 | struct netlink_ext_ack *extack) | |
96518518 PM |
727 | { |
728 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 729 | u8 genmask = nft_genmask_next(net); |
96518518 | 730 | const struct nlattr *name; |
96518518 PM |
731 | struct nft_table *table; |
732 | int family = nfmsg->nfgen_family; | |
c5c1f975 | 733 | u32 flags = 0; |
e1aaca93 | 734 | struct nft_ctx ctx; |
55dd6f93 | 735 | int err; |
96518518 | 736 | |
96518518 | 737 | name = nla[NFTA_TABLE_NAME]; |
98319cb9 | 738 | table = nf_tables_table_lookup(net, name, family, genmask); |
96518518 PM |
739 | if (IS_ERR(table)) { |
740 | if (PTR_ERR(table) != -ENOENT) | |
741 | return PTR_ERR(table); | |
1a28ad74 | 742 | } else { |
96518518 PM |
743 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
744 | return -EEXIST; | |
745 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
746 | return -EOPNOTSUPP; | |
e1aaca93 | 747 | |
98319cb9 | 748 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
e1aaca93 | 749 | return nf_tables_updtable(&ctx); |
96518518 PM |
750 | } |
751 | ||
c5c1f975 PM |
752 | if (nla[NFTA_TABLE_FLAGS]) { |
753 | flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS])); | |
754 | if (flags & ~NFT_TABLE_F_DORMANT) | |
755 | return -EINVAL; | |
756 | } | |
757 | ||
ffdb210e | 758 | err = -ENOMEM; |
1cae565e | 759 | table = kzalloc(sizeof(*table), GFP_KERNEL); |
ffdb210e | 760 | if (table == NULL) |
98319cb9 | 761 | goto err_kzalloc; |
96518518 | 762 | |
e46abbcc PS |
763 | table->name = nla_strdup(name, GFP_KERNEL); |
764 | if (table->name == NULL) | |
98319cb9 | 765 | goto err_strdup; |
e46abbcc | 766 | |
96518518 | 767 | INIT_LIST_HEAD(&table->chains); |
20a69341 | 768 | INIT_LIST_HEAD(&table->sets); |
e5009240 | 769 | INIT_LIST_HEAD(&table->objects); |
3b49e2e9 | 770 | INIT_LIST_HEAD(&table->flowtables); |
98319cb9 | 771 | table->family = family; |
c5c1f975 | 772 | table->flags = flags; |
3ecbfd65 | 773 | table->handle = ++table_handle; |
9ddf6323 | 774 | |
98319cb9 | 775 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
55dd6f93 | 776 | err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE); |
ffdb210e | 777 | if (err < 0) |
98319cb9 | 778 | goto err_trans; |
ffdb210e | 779 | |
36596dad | 780 | list_add_tail_rcu(&table->list, &net->nft.tables); |
96518518 | 781 | return 0; |
98319cb9 | 782 | err_trans: |
e46abbcc | 783 | kfree(table->name); |
98319cb9 | 784 | err_strdup: |
ffdb210e | 785 | kfree(table); |
98319cb9 | 786 | err_kzalloc: |
ffdb210e | 787 | return err; |
96518518 PM |
788 | } |
789 | ||
b9ac12ef AB |
790 | static int nft_flush_table(struct nft_ctx *ctx) |
791 | { | |
3b49e2e9 | 792 | struct nft_flowtable *flowtable, *nft; |
b9ac12ef | 793 | struct nft_chain *chain, *nc; |
e5009240 | 794 | struct nft_object *obj, *ne; |
b9ac12ef | 795 | struct nft_set *set, *ns; |
3b49e2e9 | 796 | int err; |
b9ac12ef | 797 | |
a2f18db0 | 798 | list_for_each_entry(chain, &ctx->table->chains, list) { |
664b0f8c PNA |
799 | if (!nft_is_active_next(ctx->net, chain)) |
800 | continue; | |
801 | ||
b9ac12ef AB |
802 | ctx->chain = chain; |
803 | ||
804 | err = nft_delrule_by_chain(ctx); | |
805 | if (err < 0) | |
806 | goto out; | |
b9ac12ef AB |
807 | } |
808 | ||
809 | list_for_each_entry_safe(set, ns, &ctx->table->sets, list) { | |
37a9cc52 PNA |
810 | if (!nft_is_active_next(ctx->net, set)) |
811 | continue; | |
812 | ||
408070d6 | 813 | if (nft_set_is_anonymous(set) && |
b9ac12ef AB |
814 | !list_empty(&set->bindings)) |
815 | continue; | |
816 | ||
817 | err = nft_delset(ctx, set); | |
818 | if (err < 0) | |
819 | goto out; | |
820 | } | |
821 | ||
3b49e2e9 PNA |
822 | list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) { |
823 | err = nft_delflowtable(ctx, flowtable); | |
824 | if (err < 0) | |
825 | goto out; | |
826 | } | |
827 | ||
e5009240 PNA |
828 | list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) { |
829 | err = nft_delobj(ctx, obj); | |
830 | if (err < 0) | |
831 | goto out; | |
832 | } | |
833 | ||
a2f18db0 | 834 | list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) { |
664b0f8c PNA |
835 | if (!nft_is_active_next(ctx->net, chain)) |
836 | continue; | |
837 | ||
a2f18db0 PNA |
838 | ctx->chain = chain; |
839 | ||
840 | err = nft_delchain(ctx); | |
841 | if (err < 0) | |
842 | goto out; | |
843 | } | |
844 | ||
b9ac12ef AB |
845 | err = nft_deltable(ctx); |
846 | out: | |
847 | return err; | |
848 | } | |
849 | ||
850 | static int nft_flush(struct nft_ctx *ctx, int family) | |
851 | { | |
b9ac12ef AB |
852 | struct nft_table *table, *nt; |
853 | const struct nlattr * const *nla = ctx->nla; | |
854 | int err = 0; | |
855 | ||
36596dad | 856 | list_for_each_entry_safe(table, nt, &ctx->net->nft.tables, list) { |
98319cb9 | 857 | if (family != AF_UNSPEC && table->family != family) |
b9ac12ef AB |
858 | continue; |
859 | ||
98319cb9 | 860 | ctx->family = table->family; |
f2a6d766 | 861 | |
36596dad PNA |
862 | if (!nft_is_active_next(ctx->net, table)) |
863 | continue; | |
b9ac12ef | 864 | |
36596dad PNA |
865 | if (nla[NFTA_TABLE_NAME] && |
866 | nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0) | |
867 | continue; | |
b9ac12ef | 868 | |
36596dad PNA |
869 | ctx->table = table; |
870 | ||
871 | err = nft_flush_table(ctx); | |
872 | if (err < 0) | |
873 | goto out; | |
b9ac12ef AB |
874 | } |
875 | out: | |
876 | return err; | |
877 | } | |
878 | ||
633c9a84 PNA |
879 | static int nf_tables_deltable(struct net *net, struct sock *nlsk, |
880 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
881 | const struct nlattr * const nla[], |
882 | struct netlink_ext_ack *extack) | |
96518518 PM |
883 | { |
884 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 885 | u8 genmask = nft_genmask_next(net); |
96518518 | 886 | struct nft_table *table; |
ee01d542 | 887 | int family = nfmsg->nfgen_family; |
55dd6f93 | 888 | struct nft_ctx ctx; |
96518518 | 889 | |
36596dad | 890 | nft_ctx_init(&ctx, net, skb, nlh, 0, NULL, NULL, nla); |
3ecbfd65 HS |
891 | if (family == AF_UNSPEC || |
892 | (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE])) | |
b9ac12ef AB |
893 | return nft_flush(&ctx, family); |
894 | ||
3ecbfd65 HS |
895 | if (nla[NFTA_TABLE_HANDLE]) |
896 | table = nf_tables_table_lookup_byhandle(net, | |
897 | nla[NFTA_TABLE_HANDLE], | |
898 | genmask); | |
899 | else | |
900 | table = nf_tables_table_lookup(net, nla[NFTA_TABLE_NAME], | |
901 | family, genmask); | |
902 | ||
96518518 PM |
903 | if (IS_ERR(table)) |
904 | return PTR_ERR(table); | |
96518518 | 905 | |
a8278400 PNA |
906 | if (nlh->nlmsg_flags & NLM_F_NONREC && |
907 | table->use > 0) | |
908 | return -EBUSY; | |
909 | ||
98319cb9 | 910 | ctx.family = family; |
b9ac12ef | 911 | ctx.table = table; |
55dd6f93 | 912 | |
b9ac12ef | 913 | return nft_flush_table(&ctx); |
96518518 PM |
914 | } |
915 | ||
55dd6f93 PNA |
916 | static void nf_tables_table_destroy(struct nft_ctx *ctx) |
917 | { | |
4fefee57 PNA |
918 | BUG_ON(ctx->table->use > 0); |
919 | ||
e46abbcc | 920 | kfree(ctx->table->name); |
55dd6f93 | 921 | kfree(ctx->table); |
55dd6f93 PNA |
922 | } |
923 | ||
cc07eeb0 | 924 | void nft_register_chain_type(const struct nft_chain_type *ctype) |
96518518 | 925 | { |
d8297d4f | 926 | if (WARN_ON(ctype->family >= NFPROTO_NUMPROTO)) |
cc07eeb0 | 927 | return; |
d8297d4f | 928 | |
96518518 | 929 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
cc07eeb0 PNA |
930 | if (WARN_ON(chain_type[ctype->family][ctype->type] != NULL)) { |
931 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
932 | return; | |
96518518 | 933 | } |
9370761c | 934 | chain_type[ctype->family][ctype->type] = ctype; |
96518518 | 935 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
96518518 | 936 | } |
9370761c | 937 | EXPORT_SYMBOL_GPL(nft_register_chain_type); |
96518518 | 938 | |
32537e91 | 939 | void nft_unregister_chain_type(const struct nft_chain_type *ctype) |
96518518 | 940 | { |
96518518 | 941 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
9370761c | 942 | chain_type[ctype->family][ctype->type] = NULL; |
96518518 PM |
943 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
944 | } | |
9370761c | 945 | EXPORT_SYMBOL_GPL(nft_unregister_chain_type); |
96518518 PM |
946 | |
947 | /* | |
948 | * Chains | |
949 | */ | |
950 | ||
951 | static struct nft_chain * | |
664b0f8c PNA |
952 | nf_tables_chain_lookup_byhandle(const struct nft_table *table, u64 handle, |
953 | u8 genmask) | |
96518518 PM |
954 | { |
955 | struct nft_chain *chain; | |
956 | ||
957 | list_for_each_entry(chain, &table->chains, list) { | |
664b0f8c PNA |
958 | if (chain->handle == handle && |
959 | nft_active_genmask(chain, genmask)) | |
96518518 PM |
960 | return chain; |
961 | } | |
962 | ||
963 | return ERR_PTR(-ENOENT); | |
964 | } | |
965 | ||
966 | static struct nft_chain *nf_tables_chain_lookup(const struct nft_table *table, | |
664b0f8c PNA |
967 | const struct nlattr *nla, |
968 | u8 genmask) | |
96518518 PM |
969 | { |
970 | struct nft_chain *chain; | |
971 | ||
972 | if (nla == NULL) | |
973 | return ERR_PTR(-EINVAL); | |
974 | ||
975 | list_for_each_entry(chain, &table->chains, list) { | |
664b0f8c PNA |
976 | if (!nla_strcmp(nla, chain->name) && |
977 | nft_active_genmask(chain, genmask)) | |
96518518 PM |
978 | return chain; |
979 | } | |
980 | ||
981 | return ERR_PTR(-ENOENT); | |
982 | } | |
983 | ||
984 | static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = { | |
b2fbd044 LZ |
985 | [NFTA_CHAIN_TABLE] = { .type = NLA_STRING, |
986 | .len = NFT_TABLE_MAXNAMELEN - 1 }, | |
96518518 PM |
987 | [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 }, |
988 | [NFTA_CHAIN_NAME] = { .type = NLA_STRING, | |
989 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, | |
990 | [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED }, | |
0ca743a5 | 991 | [NFTA_CHAIN_POLICY] = { .type = NLA_U32 }, |
4c1f7818 | 992 | [NFTA_CHAIN_TYPE] = { .type = NLA_STRING }, |
0ca743a5 | 993 | [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED }, |
96518518 PM |
994 | }; |
995 | ||
996 | static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = { | |
997 | [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 }, | |
998 | [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 }, | |
2cbce139 PNA |
999 | [NFTA_HOOK_DEV] = { .type = NLA_STRING, |
1000 | .len = IFNAMSIZ - 1 }, | |
96518518 PM |
1001 | }; |
1002 | ||
0ca743a5 PNA |
1003 | static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats) |
1004 | { | |
1005 | struct nft_stats *cpu_stats, total; | |
1006 | struct nlattr *nest; | |
ce355e20 ED |
1007 | unsigned int seq; |
1008 | u64 pkts, bytes; | |
0ca743a5 PNA |
1009 | int cpu; |
1010 | ||
1011 | memset(&total, 0, sizeof(total)); | |
1012 | for_each_possible_cpu(cpu) { | |
1013 | cpu_stats = per_cpu_ptr(stats, cpu); | |
ce355e20 ED |
1014 | do { |
1015 | seq = u64_stats_fetch_begin_irq(&cpu_stats->syncp); | |
1016 | pkts = cpu_stats->pkts; | |
1017 | bytes = cpu_stats->bytes; | |
1018 | } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, seq)); | |
1019 | total.pkts += pkts; | |
1020 | total.bytes += bytes; | |
0ca743a5 PNA |
1021 | } |
1022 | nest = nla_nest_start(skb, NFTA_CHAIN_COUNTERS); | |
1023 | if (nest == NULL) | |
1024 | goto nla_put_failure; | |
1025 | ||
b46f6ded ND |
1026 | if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts), |
1027 | NFTA_COUNTER_PAD) || | |
1028 | nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes), | |
1029 | NFTA_COUNTER_PAD)) | |
0ca743a5 PNA |
1030 | goto nla_put_failure; |
1031 | ||
1032 | nla_nest_end(skb, nest); | |
1033 | return 0; | |
1034 | ||
1035 | nla_put_failure: | |
1036 | return -ENOSPC; | |
1037 | } | |
1038 | ||
84d7fce6 PNA |
1039 | static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net, |
1040 | u32 portid, u32 seq, int event, u32 flags, | |
1041 | int family, const struct nft_table *table, | |
96518518 PM |
1042 | const struct nft_chain *chain) |
1043 | { | |
1044 | struct nlmsghdr *nlh; | |
1045 | struct nfgenmsg *nfmsg; | |
1046 | ||
dedb67c4 | 1047 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); |
96518518 PM |
1048 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
1049 | if (nlh == NULL) | |
1050 | goto nla_put_failure; | |
1051 | ||
1052 | nfmsg = nlmsg_data(nlh); | |
1053 | nfmsg->nfgen_family = family; | |
1054 | nfmsg->version = NFNETLINK_V0; | |
84d7fce6 | 1055 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
96518518 PM |
1056 | |
1057 | if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name)) | |
1058 | goto nla_put_failure; | |
b46f6ded ND |
1059 | if (nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle), |
1060 | NFTA_CHAIN_PAD)) | |
96518518 PM |
1061 | goto nla_put_failure; |
1062 | if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name)) | |
1063 | goto nla_put_failure; | |
1064 | ||
f323d954 | 1065 | if (nft_is_base_chain(chain)) { |
0ca743a5 | 1066 | const struct nft_base_chain *basechain = nft_base_chain(chain); |
c974a3a3 | 1067 | const struct nf_hook_ops *ops = &basechain->ops; |
0ca743a5 PNA |
1068 | struct nlattr *nest; |
1069 | ||
1070 | nest = nla_nest_start(skb, NFTA_CHAIN_HOOK); | |
96518518 PM |
1071 | if (nest == NULL) |
1072 | goto nla_put_failure; | |
1073 | if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum))) | |
1074 | goto nla_put_failure; | |
1075 | if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority))) | |
1076 | goto nla_put_failure; | |
2cbce139 PNA |
1077 | if (basechain->dev_name[0] && |
1078 | nla_put_string(skb, NFTA_HOOK_DEV, basechain->dev_name)) | |
1079 | goto nla_put_failure; | |
96518518 | 1080 | nla_nest_end(skb, nest); |
9370761c | 1081 | |
0ca743a5 PNA |
1082 | if (nla_put_be32(skb, NFTA_CHAIN_POLICY, |
1083 | htonl(basechain->policy))) | |
1084 | goto nla_put_failure; | |
1085 | ||
baae3e62 PM |
1086 | if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name)) |
1087 | goto nla_put_failure; | |
0ca743a5 | 1088 | |
5f9bfe0e | 1089 | if (basechain->stats && nft_dump_stats(skb, basechain->stats)) |
0ca743a5 | 1090 | goto nla_put_failure; |
96518518 PM |
1091 | } |
1092 | ||
0ca743a5 PNA |
1093 | if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use))) |
1094 | goto nla_put_failure; | |
1095 | ||
053c095a JB |
1096 | nlmsg_end(skb, nlh); |
1097 | return 0; | |
96518518 PM |
1098 | |
1099 | nla_put_failure: | |
1100 | nlmsg_trim(skb, nlh); | |
1101 | return -1; | |
1102 | } | |
1103 | ||
25e94a99 | 1104 | static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event) |
96518518 PM |
1105 | { |
1106 | struct sk_buff *skb; | |
96518518 PM |
1107 | int err; |
1108 | ||
128ad332 PNA |
1109 | if (!ctx->report && |
1110 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) | |
25e94a99 | 1111 | return; |
96518518 | 1112 | |
96518518 PM |
1113 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
1114 | if (skb == NULL) | |
1115 | goto err; | |
1116 | ||
84d7fce6 | 1117 | err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq, |
36596dad | 1118 | event, 0, ctx->family, ctx->table, |
35151d84 | 1119 | ctx->chain); |
96518518 PM |
1120 | if (err < 0) { |
1121 | kfree_skb(skb); | |
1122 | goto err; | |
1123 | } | |
1124 | ||
25e94a99 PNA |
1125 | nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
1126 | ctx->report, GFP_KERNEL); | |
1127 | return; | |
96518518 | 1128 | err: |
25e94a99 | 1129 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS); |
96518518 PM |
1130 | } |
1131 | ||
1132 | static int nf_tables_dump_chains(struct sk_buff *skb, | |
1133 | struct netlink_callback *cb) | |
1134 | { | |
1135 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
96518518 PM |
1136 | const struct nft_table *table; |
1137 | const struct nft_chain *chain; | |
1138 | unsigned int idx = 0, s_idx = cb->args[0]; | |
99633ab2 | 1139 | struct net *net = sock_net(skb->sk); |
96518518 PM |
1140 | int family = nfmsg->nfgen_family; |
1141 | ||
e688a7f8 | 1142 | rcu_read_lock(); |
38e029f1 PNA |
1143 | cb->seq = net->nft.base_seq; |
1144 | ||
36596dad | 1145 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
98319cb9 | 1146 | if (family != NFPROTO_UNSPEC && family != table->family) |
96518518 PM |
1147 | continue; |
1148 | ||
36596dad PNA |
1149 | list_for_each_entry_rcu(chain, &table->chains, list) { |
1150 | if (idx < s_idx) | |
1151 | goto cont; | |
1152 | if (idx > s_idx) | |
1153 | memset(&cb->args[1], 0, | |
1154 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1155 | if (!nft_is_active(net, chain)) | |
1156 | continue; | |
1157 | if (nf_tables_fill_chain_info(skb, net, | |
1158 | NETLINK_CB(cb->skb).portid, | |
1159 | cb->nlh->nlmsg_seq, | |
1160 | NFT_MSG_NEWCHAIN, | |
1161 | NLM_F_MULTI, | |
98319cb9 | 1162 | table->family, table, |
36596dad PNA |
1163 | chain) < 0) |
1164 | goto done; | |
38e029f1 | 1165 | |
36596dad | 1166 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
96518518 | 1167 | cont: |
36596dad | 1168 | idx++; |
96518518 PM |
1169 | } |
1170 | } | |
1171 | done: | |
e688a7f8 | 1172 | rcu_read_unlock(); |
96518518 PM |
1173 | cb->args[0] = idx; |
1174 | return skb->len; | |
1175 | } | |
1176 | ||
7b8002a1 PNA |
1177 | static int nf_tables_getchain(struct net *net, struct sock *nlsk, |
1178 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
1179 | const struct nlattr * const nla[], |
1180 | struct netlink_ext_ack *extack) | |
96518518 PM |
1181 | { |
1182 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 1183 | u8 genmask = nft_genmask_cur(net); |
96518518 PM |
1184 | const struct nft_table *table; |
1185 | const struct nft_chain *chain; | |
1186 | struct sk_buff *skb2; | |
1187 | int family = nfmsg->nfgen_family; | |
1188 | int err; | |
1189 | ||
1190 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
1191 | struct netlink_dump_control c = { | |
1192 | .dump = nf_tables_dump_chains, | |
1193 | }; | |
1194 | return netlink_dump_start(nlsk, skb, nlh, &c); | |
1195 | } | |
1196 | ||
98319cb9 | 1197 | table = nf_tables_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, |
36596dad | 1198 | genmask); |
96518518 PM |
1199 | if (IS_ERR(table)) |
1200 | return PTR_ERR(table); | |
1201 | ||
664b0f8c | 1202 | chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask); |
96518518 PM |
1203 | if (IS_ERR(chain)) |
1204 | return PTR_ERR(chain); | |
1205 | ||
1206 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
1207 | if (!skb2) | |
1208 | return -ENOMEM; | |
1209 | ||
84d7fce6 | 1210 | err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid, |
96518518 PM |
1211 | nlh->nlmsg_seq, NFT_MSG_NEWCHAIN, 0, |
1212 | family, table, chain); | |
1213 | if (err < 0) | |
1214 | goto err; | |
1215 | ||
1216 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
1217 | ||
1218 | err: | |
1219 | kfree_skb(skb2); | |
1220 | return err; | |
1221 | } | |
1222 | ||
0ca743a5 PNA |
1223 | static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = { |
1224 | [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 }, | |
1225 | [NFTA_COUNTER_BYTES] = { .type = NLA_U64 }, | |
1226 | }; | |
1227 | ||
ff3cd7b3 | 1228 | static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr) |
0ca743a5 PNA |
1229 | { |
1230 | struct nlattr *tb[NFTA_COUNTER_MAX+1]; | |
1231 | struct nft_stats __percpu *newstats; | |
1232 | struct nft_stats *stats; | |
1233 | int err; | |
1234 | ||
fceb6435 JB |
1235 | err = nla_parse_nested(tb, NFTA_COUNTER_MAX, attr, nft_counter_policy, |
1236 | NULL); | |
0ca743a5 | 1237 | if (err < 0) |
ff3cd7b3 | 1238 | return ERR_PTR(err); |
0ca743a5 PNA |
1239 | |
1240 | if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS]) | |
ff3cd7b3 | 1241 | return ERR_PTR(-EINVAL); |
0ca743a5 | 1242 | |
ce355e20 | 1243 | newstats = netdev_alloc_pcpu_stats(struct nft_stats); |
0ca743a5 | 1244 | if (newstats == NULL) |
ff3cd7b3 | 1245 | return ERR_PTR(-ENOMEM); |
0ca743a5 PNA |
1246 | |
1247 | /* Restore old counters on this cpu, no problem. Per-cpu statistics | |
1248 | * are not exposed to userspace. | |
1249 | */ | |
e8781f70 | 1250 | preempt_disable(); |
0ca743a5 PNA |
1251 | stats = this_cpu_ptr(newstats); |
1252 | stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES])); | |
1253 | stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS])); | |
e8781f70 | 1254 | preempt_enable(); |
0ca743a5 | 1255 | |
ff3cd7b3 PNA |
1256 | return newstats; |
1257 | } | |
1258 | ||
1259 | static void nft_chain_stats_replace(struct nft_base_chain *chain, | |
1260 | struct nft_stats __percpu *newstats) | |
1261 | { | |
0befd061 PNA |
1262 | struct nft_stats __percpu *oldstats; |
1263 | ||
b88825de PNA |
1264 | if (newstats == NULL) |
1265 | return; | |
1266 | ||
0ca743a5 | 1267 | if (chain->stats) { |
0befd061 | 1268 | oldstats = nfnl_dereference(chain->stats, NFNL_SUBSYS_NFTABLES); |
0ca743a5 PNA |
1269 | rcu_assign_pointer(chain->stats, newstats); |
1270 | synchronize_rcu(); | |
1271 | free_percpu(oldstats); | |
1272 | } else | |
1273 | rcu_assign_pointer(chain->stats, newstats); | |
0ca743a5 PNA |
1274 | } |
1275 | ||
43a605f2 | 1276 | static void nf_tables_chain_destroy(struct nft_ctx *ctx) |
91c7b38d | 1277 | { |
43a605f2 PNA |
1278 | struct nft_chain *chain = ctx->chain; |
1279 | ||
91c7b38d PNA |
1280 | BUG_ON(chain->use > 0); |
1281 | ||
f323d954 | 1282 | if (nft_is_base_chain(chain)) { |
2cbce139 PNA |
1283 | struct nft_base_chain *basechain = nft_base_chain(chain); |
1284 | ||
43a605f2 PNA |
1285 | if (basechain->type->free) |
1286 | basechain->type->free(ctx); | |
2cbce139 PNA |
1287 | module_put(basechain->type->owner); |
1288 | free_percpu(basechain->stats); | |
9f08ea84 PNA |
1289 | if (basechain->stats) |
1290 | static_branch_dec(&nft_counters_enabled); | |
b7263e07 | 1291 | kfree(chain->name); |
2cbce139 | 1292 | kfree(basechain); |
91c7b38d | 1293 | } else { |
b7263e07 | 1294 | kfree(chain->name); |
91c7b38d PNA |
1295 | kfree(chain); |
1296 | } | |
1297 | } | |
1298 | ||
508f8ccd PNA |
1299 | struct nft_chain_hook { |
1300 | u32 num; | |
84ba7dd7 | 1301 | s32 priority; |
32537e91 | 1302 | const struct nft_chain_type *type; |
508f8ccd PNA |
1303 | struct net_device *dev; |
1304 | }; | |
1305 | ||
1306 | static int nft_chain_parse_hook(struct net *net, | |
1307 | const struct nlattr * const nla[], | |
36596dad PNA |
1308 | struct nft_chain_hook *hook, u8 family, |
1309 | bool create) | |
508f8ccd PNA |
1310 | { |
1311 | struct nlattr *ha[NFTA_HOOK_MAX + 1]; | |
32537e91 | 1312 | const struct nft_chain_type *type; |
508f8ccd PNA |
1313 | struct net_device *dev; |
1314 | int err; | |
1315 | ||
1316 | err = nla_parse_nested(ha, NFTA_HOOK_MAX, nla[NFTA_CHAIN_HOOK], | |
fceb6435 | 1317 | nft_hook_policy, NULL); |
508f8ccd PNA |
1318 | if (err < 0) |
1319 | return err; | |
1320 | ||
1321 | if (ha[NFTA_HOOK_HOOKNUM] == NULL || | |
1322 | ha[NFTA_HOOK_PRIORITY] == NULL) | |
1323 | return -EINVAL; | |
1324 | ||
1325 | hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM])); | |
508f8ccd PNA |
1326 | hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY])); |
1327 | ||
36596dad | 1328 | type = chain_type[family][NFT_CHAIN_T_DEFAULT]; |
508f8ccd | 1329 | if (nla[NFTA_CHAIN_TYPE]) { |
1ea26cca | 1330 | type = nf_tables_chain_type_lookup(nla[NFTA_CHAIN_TYPE], |
36596dad | 1331 | family, create); |
508f8ccd PNA |
1332 | if (IS_ERR(type)) |
1333 | return PTR_ERR(type); | |
1334 | } | |
1335 | if (!(type->hook_mask & (1 << hook->num))) | |
1336 | return -EOPNOTSUPP; | |
84ba7dd7 FW |
1337 | |
1338 | if (type->type == NFT_CHAIN_T_NAT && | |
1339 | hook->priority <= NF_IP_PRI_CONNTRACK) | |
1340 | return -EOPNOTSUPP; | |
1341 | ||
508f8ccd PNA |
1342 | if (!try_module_get(type->owner)) |
1343 | return -ENOENT; | |
1344 | ||
1345 | hook->type = type; | |
1346 | ||
1347 | hook->dev = NULL; | |
36596dad | 1348 | if (family == NFPROTO_NETDEV) { |
508f8ccd PNA |
1349 | char ifname[IFNAMSIZ]; |
1350 | ||
1351 | if (!ha[NFTA_HOOK_DEV]) { | |
1352 | module_put(type->owner); | |
1353 | return -EOPNOTSUPP; | |
1354 | } | |
1355 | ||
1356 | nla_strlcpy(ifname, ha[NFTA_HOOK_DEV], IFNAMSIZ); | |
90d2723c | 1357 | dev = __dev_get_by_name(net, ifname); |
508f8ccd PNA |
1358 | if (!dev) { |
1359 | module_put(type->owner); | |
1360 | return -ENOENT; | |
1361 | } | |
1362 | hook->dev = dev; | |
1363 | } else if (ha[NFTA_HOOK_DEV]) { | |
1364 | module_put(type->owner); | |
1365 | return -EOPNOTSUPP; | |
1366 | } | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | static void nft_chain_release_hook(struct nft_chain_hook *hook) | |
1372 | { | |
1373 | module_put(hook->type->owner); | |
508f8ccd PNA |
1374 | } |
1375 | ||
4035285f PNA |
1376 | static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, |
1377 | u8 policy, bool create) | |
1378 | { | |
1379 | const struct nlattr * const *nla = ctx->nla; | |
1380 | struct nft_table *table = ctx->table; | |
4035285f PNA |
1381 | struct nft_base_chain *basechain; |
1382 | struct nft_stats __percpu *stats; | |
1383 | struct net *net = ctx->net; | |
1384 | struct nft_chain *chain; | |
4035285f PNA |
1385 | int err; |
1386 | ||
1387 | if (table->use == UINT_MAX) | |
1388 | return -EOVERFLOW; | |
1389 | ||
1390 | if (nla[NFTA_CHAIN_HOOK]) { | |
1391 | struct nft_chain_hook hook; | |
1392 | struct nf_hook_ops *ops; | |
4035285f | 1393 | |
36596dad | 1394 | err = nft_chain_parse_hook(net, nla, &hook, family, create); |
4035285f PNA |
1395 | if (err < 0) |
1396 | return err; | |
1397 | ||
1398 | basechain = kzalloc(sizeof(*basechain), GFP_KERNEL); | |
1399 | if (basechain == NULL) { | |
1400 | nft_chain_release_hook(&hook); | |
1401 | return -ENOMEM; | |
1402 | } | |
1403 | ||
1404 | if (hook.dev != NULL) | |
1405 | strncpy(basechain->dev_name, hook.dev->name, IFNAMSIZ); | |
1406 | ||
1407 | if (nla[NFTA_CHAIN_COUNTERS]) { | |
1408 | stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); | |
1409 | if (IS_ERR(stats)) { | |
1410 | nft_chain_release_hook(&hook); | |
1411 | kfree(basechain); | |
1412 | return PTR_ERR(stats); | |
1413 | } | |
1414 | basechain->stats = stats; | |
1415 | static_branch_inc(&nft_counters_enabled); | |
1416 | } | |
1417 | ||
4035285f | 1418 | basechain->type = hook.type; |
43a605f2 PNA |
1419 | if (basechain->type->init) |
1420 | basechain->type->init(ctx); | |
1421 | ||
4035285f PNA |
1422 | chain = &basechain->chain; |
1423 | ||
c974a3a3 PNA |
1424 | ops = &basechain->ops; |
1425 | ops->pf = family; | |
1426 | ops->hooknum = hook.num; | |
1427 | ops->priority = hook.priority; | |
1428 | ops->priv = chain; | |
c2f9eafe | 1429 | ops->hook = hook.type->hooks[ops->hooknum]; |
c974a3a3 | 1430 | ops->dev = hook.dev; |
c974a3a3 PNA |
1431 | |
1432 | if (basechain->type->type == NFT_CHAIN_T_NAT) | |
1433 | ops->nat_hook = true; | |
4035285f PNA |
1434 | |
1435 | chain->flags |= NFT_BASE_CHAIN; | |
1436 | basechain->policy = policy; | |
1437 | } else { | |
1438 | chain = kzalloc(sizeof(*chain), GFP_KERNEL); | |
1439 | if (chain == NULL) | |
1440 | return -ENOMEM; | |
1441 | } | |
43a605f2 PNA |
1442 | ctx->chain = chain; |
1443 | ||
4035285f PNA |
1444 | INIT_LIST_HEAD(&chain->rules); |
1445 | chain->handle = nf_tables_alloc_handle(table); | |
1446 | chain->table = table; | |
1447 | chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL); | |
1448 | if (!chain->name) { | |
1449 | err = -ENOMEM; | |
1450 | goto err1; | |
1451 | } | |
1452 | ||
c974a3a3 | 1453 | err = nf_tables_register_hook(net, table, chain); |
4035285f PNA |
1454 | if (err < 0) |
1455 | goto err1; | |
1456 | ||
4035285f PNA |
1457 | err = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN); |
1458 | if (err < 0) | |
1459 | goto err2; | |
1460 | ||
1461 | table->use++; | |
1462 | list_add_tail_rcu(&chain->list, &table->chains); | |
1463 | ||
1464 | return 0; | |
1465 | err2: | |
c974a3a3 | 1466 | nf_tables_unregister_hook(net, table, chain); |
4035285f | 1467 | err1: |
43a605f2 | 1468 | nf_tables_chain_destroy(ctx); |
4035285f PNA |
1469 | |
1470 | return err; | |
1471 | } | |
1472 | ||
2c4a488a PNA |
1473 | static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy, |
1474 | bool create) | |
1475 | { | |
1476 | const struct nlattr * const *nla = ctx->nla; | |
1477 | struct nft_table *table = ctx->table; | |
1478 | struct nft_chain *chain = ctx->chain; | |
2c4a488a PNA |
1479 | struct nft_base_chain *basechain; |
1480 | struct nft_stats *stats = NULL; | |
1481 | struct nft_chain_hook hook; | |
1482 | const struct nlattr *name; | |
1483 | struct nf_hook_ops *ops; | |
1484 | struct nft_trans *trans; | |
c974a3a3 | 1485 | int err; |
2c4a488a PNA |
1486 | |
1487 | if (nla[NFTA_CHAIN_HOOK]) { | |
1488 | if (!nft_is_base_chain(chain)) | |
1489 | return -EBUSY; | |
1490 | ||
36596dad | 1491 | err = nft_chain_parse_hook(ctx->net, nla, &hook, ctx->family, |
2c4a488a PNA |
1492 | create); |
1493 | if (err < 0) | |
1494 | return err; | |
1495 | ||
1496 | basechain = nft_base_chain(chain); | |
1497 | if (basechain->type != hook.type) { | |
1498 | nft_chain_release_hook(&hook); | |
1499 | return -EBUSY; | |
1500 | } | |
1501 | ||
c974a3a3 PNA |
1502 | ops = &basechain->ops; |
1503 | if (ops->hooknum != hook.num || | |
1504 | ops->priority != hook.priority || | |
1505 | ops->dev != hook.dev) { | |
1506 | nft_chain_release_hook(&hook); | |
1507 | return -EBUSY; | |
2c4a488a PNA |
1508 | } |
1509 | nft_chain_release_hook(&hook); | |
1510 | } | |
1511 | ||
1512 | if (nla[NFTA_CHAIN_HANDLE] && | |
1513 | nla[NFTA_CHAIN_NAME]) { | |
1514 | struct nft_chain *chain2; | |
1515 | ||
1516 | chain2 = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], | |
1517 | genmask); | |
0d18779b JC |
1518 | if (!IS_ERR(chain2)) |
1519 | return -EEXIST; | |
2c4a488a PNA |
1520 | } |
1521 | ||
1522 | if (nla[NFTA_CHAIN_COUNTERS]) { | |
1523 | if (!nft_is_base_chain(chain)) | |
1524 | return -EOPNOTSUPP; | |
1525 | ||
1526 | stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]); | |
1527 | if (IS_ERR(stats)) | |
1528 | return PTR_ERR(stats); | |
1529 | } | |
1530 | ||
1531 | trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN, | |
1532 | sizeof(struct nft_trans_chain)); | |
1533 | if (trans == NULL) { | |
1534 | free_percpu(stats); | |
1535 | return -ENOMEM; | |
1536 | } | |
1537 | ||
1538 | nft_trans_chain_stats(trans) = stats; | |
1539 | nft_trans_chain_update(trans) = true; | |
1540 | ||
1541 | if (nla[NFTA_CHAIN_POLICY]) | |
1542 | nft_trans_chain_policy(trans) = policy; | |
1543 | else | |
1544 | nft_trans_chain_policy(trans) = -1; | |
1545 | ||
1546 | name = nla[NFTA_CHAIN_NAME]; | |
1547 | if (nla[NFTA_CHAIN_HANDLE] && name) { | |
1548 | nft_trans_chain_name(trans) = | |
1549 | nla_strdup(name, GFP_KERNEL); | |
1550 | if (!nft_trans_chain_name(trans)) { | |
1551 | kfree(trans); | |
1552 | free_percpu(stats); | |
1553 | return -ENOMEM; | |
1554 | } | |
1555 | } | |
1556 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); | |
1557 | ||
1558 | return 0; | |
1559 | } | |
1560 | ||
633c9a84 PNA |
1561 | static int nf_tables_newchain(struct net *net, struct sock *nlsk, |
1562 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
1563 | const struct nlattr * const nla[], |
1564 | struct netlink_ext_ack *extack) | |
96518518 PM |
1565 | { |
1566 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
1567 | const struct nlattr * uninitialized_var(name); | |
4035285f PNA |
1568 | u8 genmask = nft_genmask_next(net); |
1569 | int family = nfmsg->nfgen_family; | |
96518518 PM |
1570 | struct nft_table *table; |
1571 | struct nft_chain *chain; | |
57de2a0c | 1572 | u8 policy = NF_ACCEPT; |
4035285f | 1573 | struct nft_ctx ctx; |
96518518 | 1574 | u64 handle = 0; |
96518518 PM |
1575 | bool create; |
1576 | ||
1577 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; | |
1578 | ||
98319cb9 | 1579 | table = nf_tables_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, |
36596dad | 1580 | genmask); |
96518518 PM |
1581 | if (IS_ERR(table)) |
1582 | return PTR_ERR(table); | |
1583 | ||
96518518 PM |
1584 | chain = NULL; |
1585 | name = nla[NFTA_CHAIN_NAME]; | |
1586 | ||
1587 | if (nla[NFTA_CHAIN_HANDLE]) { | |
1588 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE])); | |
664b0f8c | 1589 | chain = nf_tables_chain_lookup_byhandle(table, handle, genmask); |
96518518 PM |
1590 | if (IS_ERR(chain)) |
1591 | return PTR_ERR(chain); | |
1592 | } else { | |
664b0f8c | 1593 | chain = nf_tables_chain_lookup(table, name, genmask); |
96518518 PM |
1594 | if (IS_ERR(chain)) { |
1595 | if (PTR_ERR(chain) != -ENOENT) | |
1596 | return PTR_ERR(chain); | |
1597 | chain = NULL; | |
1598 | } | |
1599 | } | |
1600 | ||
57de2a0c | 1601 | if (nla[NFTA_CHAIN_POLICY]) { |
f323d954 PNA |
1602 | if (chain != NULL && |
1603 | !nft_is_base_chain(chain)) | |
d6b6cb1d PNA |
1604 | return -EOPNOTSUPP; |
1605 | ||
1606 | if (chain == NULL && | |
57de2a0c PM |
1607 | nla[NFTA_CHAIN_HOOK] == NULL) |
1608 | return -EOPNOTSUPP; | |
1609 | ||
8f46df18 | 1610 | policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY])); |
57de2a0c PM |
1611 | switch (policy) { |
1612 | case NF_DROP: | |
1613 | case NF_ACCEPT: | |
1614 | break; | |
1615 | default: | |
1616 | return -EINVAL; | |
1617 | } | |
1618 | } | |
1619 | ||
98319cb9 | 1620 | nft_ctx_init(&ctx, net, skb, nlh, family, table, chain, nla); |
4035285f | 1621 | |
96518518 PM |
1622 | if (chain != NULL) { |
1623 | if (nlh->nlmsg_flags & NLM_F_EXCL) | |
1624 | return -EEXIST; | |
1625 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
1626 | return -EOPNOTSUPP; | |
1627 | ||
2c4a488a | 1628 | return nf_tables_updchain(&ctx, genmask, policy, create); |
96518518 PM |
1629 | } |
1630 | ||
4035285f | 1631 | return nf_tables_addchain(&ctx, family, genmask, policy, create); |
96518518 PM |
1632 | } |
1633 | ||
633c9a84 PNA |
1634 | static int nf_tables_delchain(struct net *net, struct sock *nlsk, |
1635 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
1636 | const struct nlattr * const nla[], |
1637 | struct netlink_ext_ack *extack) | |
96518518 PM |
1638 | { |
1639 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 1640 | u8 genmask = nft_genmask_next(net); |
96518518 PM |
1641 | struct nft_table *table; |
1642 | struct nft_chain *chain; | |
9dee1474 | 1643 | struct nft_rule *rule; |
96518518 | 1644 | int family = nfmsg->nfgen_family; |
91c7b38d | 1645 | struct nft_ctx ctx; |
3ecbfd65 | 1646 | u64 handle; |
9dee1474 PNA |
1647 | u32 use; |
1648 | int err; | |
96518518 | 1649 | |
98319cb9 | 1650 | table = nf_tables_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, |
36596dad | 1651 | genmask); |
96518518 PM |
1652 | if (IS_ERR(table)) |
1653 | return PTR_ERR(table); | |
1654 | ||
3ecbfd65 HS |
1655 | if (nla[NFTA_CHAIN_HANDLE]) { |
1656 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE])); | |
1657 | chain = nf_tables_chain_lookup_byhandle(table, handle, genmask); | |
1658 | } else { | |
1659 | chain = nf_tables_chain_lookup(table, nla[NFTA_CHAIN_NAME], genmask); | |
1660 | } | |
96518518 PM |
1661 | if (IS_ERR(chain)) |
1662 | return PTR_ERR(chain); | |
9dee1474 PNA |
1663 | |
1664 | if (nlh->nlmsg_flags & NLM_F_NONREC && | |
1665 | chain->use > 0) | |
96518518 PM |
1666 | return -EBUSY; |
1667 | ||
98319cb9 | 1668 | nft_ctx_init(&ctx, net, skb, nlh, family, table, chain, nla); |
0165d932 | 1669 | |
9dee1474 PNA |
1670 | use = chain->use; |
1671 | list_for_each_entry(rule, &chain->rules, list) { | |
1672 | if (!nft_is_active_next(net, rule)) | |
1673 | continue; | |
1674 | use--; | |
1675 | ||
1676 | err = nft_delrule(&ctx, rule); | |
1677 | if (err < 0) | |
1678 | return err; | |
1679 | } | |
1680 | ||
1681 | /* There are rules and elements that are still holding references to us, | |
1682 | * we cannot do a recursive removal in this case. | |
1683 | */ | |
1684 | if (use > 0) | |
1685 | return -EBUSY; | |
1686 | ||
ee01d542 | 1687 | return nft_delchain(&ctx); |
96518518 PM |
1688 | } |
1689 | ||
96518518 PM |
1690 | /* |
1691 | * Expressions | |
1692 | */ | |
1693 | ||
1694 | /** | |
ef1f7df9 PM |
1695 | * nft_register_expr - register nf_tables expr type |
1696 | * @ops: expr type | |
96518518 | 1697 | * |
ef1f7df9 | 1698 | * Registers the expr type for use with nf_tables. Returns zero on |
96518518 PM |
1699 | * success or a negative errno code otherwise. |
1700 | */ | |
ef1f7df9 | 1701 | int nft_register_expr(struct nft_expr_type *type) |
96518518 PM |
1702 | { |
1703 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
758dbcec | 1704 | if (type->family == NFPROTO_UNSPEC) |
e688a7f8 | 1705 | list_add_tail_rcu(&type->list, &nf_tables_expressions); |
758dbcec | 1706 | else |
e688a7f8 | 1707 | list_add_rcu(&type->list, &nf_tables_expressions); |
96518518 PM |
1708 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
1709 | return 0; | |
1710 | } | |
1711 | EXPORT_SYMBOL_GPL(nft_register_expr); | |
1712 | ||
1713 | /** | |
ef1f7df9 PM |
1714 | * nft_unregister_expr - unregister nf_tables expr type |
1715 | * @ops: expr type | |
96518518 | 1716 | * |
ef1f7df9 | 1717 | * Unregisters the expr typefor use with nf_tables. |
96518518 | 1718 | */ |
ef1f7df9 | 1719 | void nft_unregister_expr(struct nft_expr_type *type) |
96518518 PM |
1720 | { |
1721 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
e688a7f8 | 1722 | list_del_rcu(&type->list); |
96518518 PM |
1723 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
1724 | } | |
1725 | EXPORT_SYMBOL_GPL(nft_unregister_expr); | |
1726 | ||
64d46806 PM |
1727 | static const struct nft_expr_type *__nft_expr_type_get(u8 family, |
1728 | struct nlattr *nla) | |
96518518 | 1729 | { |
ef1f7df9 | 1730 | const struct nft_expr_type *type; |
96518518 | 1731 | |
ef1f7df9 | 1732 | list_for_each_entry(type, &nf_tables_expressions, list) { |
64d46806 PM |
1733 | if (!nla_strcmp(nla, type->name) && |
1734 | (!type->family || type->family == family)) | |
ef1f7df9 | 1735 | return type; |
96518518 PM |
1736 | } |
1737 | return NULL; | |
1738 | } | |
1739 | ||
64d46806 PM |
1740 | static const struct nft_expr_type *nft_expr_type_get(u8 family, |
1741 | struct nlattr *nla) | |
96518518 | 1742 | { |
ef1f7df9 | 1743 | const struct nft_expr_type *type; |
96518518 PM |
1744 | |
1745 | if (nla == NULL) | |
1746 | return ERR_PTR(-EINVAL); | |
1747 | ||
64d46806 | 1748 | type = __nft_expr_type_get(family, nla); |
ef1f7df9 PM |
1749 | if (type != NULL && try_module_get(type->owner)) |
1750 | return type; | |
96518518 PM |
1751 | |
1752 | #ifdef CONFIG_MODULES | |
ef1f7df9 | 1753 | if (type == NULL) { |
64d46806 PM |
1754 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
1755 | request_module("nft-expr-%u-%.*s", family, | |
1756 | nla_len(nla), (char *)nla_data(nla)); | |
1757 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
1758 | if (__nft_expr_type_get(family, nla)) | |
1759 | return ERR_PTR(-EAGAIN); | |
1760 | ||
96518518 PM |
1761 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
1762 | request_module("nft-expr-%.*s", | |
1763 | nla_len(nla), (char *)nla_data(nla)); | |
1764 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
64d46806 | 1765 | if (__nft_expr_type_get(family, nla)) |
96518518 PM |
1766 | return ERR_PTR(-EAGAIN); |
1767 | } | |
1768 | #endif | |
1769 | return ERR_PTR(-ENOENT); | |
1770 | } | |
1771 | ||
1772 | static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = { | |
1773 | [NFTA_EXPR_NAME] = { .type = NLA_STRING }, | |
1774 | [NFTA_EXPR_DATA] = { .type = NLA_NESTED }, | |
1775 | }; | |
1776 | ||
1777 | static int nf_tables_fill_expr_info(struct sk_buff *skb, | |
1778 | const struct nft_expr *expr) | |
1779 | { | |
ef1f7df9 | 1780 | if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name)) |
96518518 PM |
1781 | goto nla_put_failure; |
1782 | ||
1783 | if (expr->ops->dump) { | |
1784 | struct nlattr *data = nla_nest_start(skb, NFTA_EXPR_DATA); | |
1785 | if (data == NULL) | |
1786 | goto nla_put_failure; | |
1787 | if (expr->ops->dump(skb, expr) < 0) | |
1788 | goto nla_put_failure; | |
1789 | nla_nest_end(skb, data); | |
1790 | } | |
1791 | ||
1792 | return skb->len; | |
1793 | ||
1794 | nla_put_failure: | |
1795 | return -1; | |
1796 | }; | |
1797 | ||
0b2d8a7b PM |
1798 | int nft_expr_dump(struct sk_buff *skb, unsigned int attr, |
1799 | const struct nft_expr *expr) | |
1800 | { | |
1801 | struct nlattr *nest; | |
1802 | ||
1803 | nest = nla_nest_start(skb, attr); | |
1804 | if (!nest) | |
1805 | goto nla_put_failure; | |
1806 | if (nf_tables_fill_expr_info(skb, expr) < 0) | |
1807 | goto nla_put_failure; | |
1808 | nla_nest_end(skb, nest); | |
1809 | return 0; | |
1810 | ||
1811 | nla_put_failure: | |
1812 | return -1; | |
1813 | } | |
1814 | ||
96518518 PM |
1815 | struct nft_expr_info { |
1816 | const struct nft_expr_ops *ops; | |
ef1f7df9 | 1817 | struct nlattr *tb[NFT_EXPR_MAXATTR + 1]; |
96518518 PM |
1818 | }; |
1819 | ||
0ca743a5 PNA |
1820 | static int nf_tables_expr_parse(const struct nft_ctx *ctx, |
1821 | const struct nlattr *nla, | |
96518518 PM |
1822 | struct nft_expr_info *info) |
1823 | { | |
ef1f7df9 | 1824 | const struct nft_expr_type *type; |
96518518 | 1825 | const struct nft_expr_ops *ops; |
ef1f7df9 | 1826 | struct nlattr *tb[NFTA_EXPR_MAX + 1]; |
96518518 PM |
1827 | int err; |
1828 | ||
fceb6435 | 1829 | err = nla_parse_nested(tb, NFTA_EXPR_MAX, nla, nft_expr_policy, NULL); |
96518518 PM |
1830 | if (err < 0) |
1831 | return err; | |
1832 | ||
36596dad | 1833 | type = nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]); |
ef1f7df9 PM |
1834 | if (IS_ERR(type)) |
1835 | return PTR_ERR(type); | |
1836 | ||
1837 | if (tb[NFTA_EXPR_DATA]) { | |
1838 | err = nla_parse_nested(info->tb, type->maxattr, | |
fceb6435 | 1839 | tb[NFTA_EXPR_DATA], type->policy, NULL); |
ef1f7df9 PM |
1840 | if (err < 0) |
1841 | goto err1; | |
1842 | } else | |
1843 | memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1)); | |
1844 | ||
1845 | if (type->select_ops != NULL) { | |
0ca743a5 PNA |
1846 | ops = type->select_ops(ctx, |
1847 | (const struct nlattr * const *)info->tb); | |
ef1f7df9 PM |
1848 | if (IS_ERR(ops)) { |
1849 | err = PTR_ERR(ops); | |
1850 | goto err1; | |
1851 | } | |
1852 | } else | |
1853 | ops = type->ops; | |
1854 | ||
96518518 PM |
1855 | info->ops = ops; |
1856 | return 0; | |
ef1f7df9 PM |
1857 | |
1858 | err1: | |
1859 | module_put(type->owner); | |
1860 | return err; | |
96518518 PM |
1861 | } |
1862 | ||
1863 | static int nf_tables_newexpr(const struct nft_ctx *ctx, | |
ef1f7df9 | 1864 | const struct nft_expr_info *info, |
96518518 PM |
1865 | struct nft_expr *expr) |
1866 | { | |
1867 | const struct nft_expr_ops *ops = info->ops; | |
1868 | int err; | |
1869 | ||
1870 | expr->ops = ops; | |
1871 | if (ops->init) { | |
ef1f7df9 | 1872 | err = ops->init(ctx, expr, (const struct nlattr **)info->tb); |
96518518 PM |
1873 | if (err < 0) |
1874 | goto err1; | |
1875 | } | |
1876 | ||
c56e3956 LZ |
1877 | if (ops->validate) { |
1878 | const struct nft_data *data = NULL; | |
1879 | ||
1880 | err = ops->validate(ctx, expr, &data); | |
1881 | if (err < 0) | |
1882 | goto err2; | |
1883 | } | |
1884 | ||
96518518 PM |
1885 | return 0; |
1886 | ||
c56e3956 LZ |
1887 | err2: |
1888 | if (ops->destroy) | |
1889 | ops->destroy(ctx, expr); | |
96518518 PM |
1890 | err1: |
1891 | expr->ops = NULL; | |
1892 | return err; | |
1893 | } | |
1894 | ||
62472bce PM |
1895 | static void nf_tables_expr_destroy(const struct nft_ctx *ctx, |
1896 | struct nft_expr *expr) | |
96518518 PM |
1897 | { |
1898 | if (expr->ops->destroy) | |
62472bce | 1899 | expr->ops->destroy(ctx, expr); |
ef1f7df9 | 1900 | module_put(expr->ops->type->owner); |
96518518 PM |
1901 | } |
1902 | ||
0b2d8a7b PM |
1903 | struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, |
1904 | const struct nlattr *nla) | |
1905 | { | |
1906 | struct nft_expr_info info; | |
1907 | struct nft_expr *expr; | |
1908 | int err; | |
1909 | ||
1910 | err = nf_tables_expr_parse(ctx, nla, &info); | |
1911 | if (err < 0) | |
1912 | goto err1; | |
1913 | ||
1914 | err = -ENOMEM; | |
1915 | expr = kzalloc(info.ops->size, GFP_KERNEL); | |
1916 | if (expr == NULL) | |
1917 | goto err2; | |
1918 | ||
1919 | err = nf_tables_newexpr(ctx, &info, expr); | |
1920 | if (err < 0) | |
6cafaf47 | 1921 | goto err3; |
0b2d8a7b PM |
1922 | |
1923 | return expr; | |
6cafaf47 LZ |
1924 | err3: |
1925 | kfree(expr); | |
0b2d8a7b PM |
1926 | err2: |
1927 | module_put(info.ops->type->owner); | |
1928 | err1: | |
1929 | return ERR_PTR(err); | |
1930 | } | |
1931 | ||
1932 | void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr) | |
1933 | { | |
1934 | nf_tables_expr_destroy(ctx, expr); | |
1935 | kfree(expr); | |
1936 | } | |
1937 | ||
96518518 PM |
1938 | /* |
1939 | * Rules | |
1940 | */ | |
1941 | ||
1942 | static struct nft_rule *__nf_tables_rule_lookup(const struct nft_chain *chain, | |
1943 | u64 handle) | |
1944 | { | |
1945 | struct nft_rule *rule; | |
1946 | ||
1947 | // FIXME: this sucks | |
1948 | list_for_each_entry(rule, &chain->rules, list) { | |
1949 | if (handle == rule->handle) | |
1950 | return rule; | |
1951 | } | |
1952 | ||
1953 | return ERR_PTR(-ENOENT); | |
1954 | } | |
1955 | ||
1956 | static struct nft_rule *nf_tables_rule_lookup(const struct nft_chain *chain, | |
1957 | const struct nlattr *nla) | |
1958 | { | |
1959 | if (nla == NULL) | |
1960 | return ERR_PTR(-EINVAL); | |
1961 | ||
1962 | return __nf_tables_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla))); | |
1963 | } | |
1964 | ||
1965 | static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = { | |
b2fbd044 LZ |
1966 | [NFTA_RULE_TABLE] = { .type = NLA_STRING, |
1967 | .len = NFT_TABLE_MAXNAMELEN - 1 }, | |
96518518 PM |
1968 | [NFTA_RULE_CHAIN] = { .type = NLA_STRING, |
1969 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, | |
1970 | [NFTA_RULE_HANDLE] = { .type = NLA_U64 }, | |
1971 | [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED }, | |
0ca743a5 | 1972 | [NFTA_RULE_COMPAT] = { .type = NLA_NESTED }, |
5e948466 | 1973 | [NFTA_RULE_POSITION] = { .type = NLA_U64 }, |
0768b3b3 PNA |
1974 | [NFTA_RULE_USERDATA] = { .type = NLA_BINARY, |
1975 | .len = NFT_USERDATA_MAXLEN }, | |
467697d2 | 1976 | [NFTA_RULE_ID] = { .type = NLA_U32 }, |
96518518 PM |
1977 | }; |
1978 | ||
84d7fce6 PNA |
1979 | static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net, |
1980 | u32 portid, u32 seq, int event, | |
1981 | u32 flags, int family, | |
96518518 PM |
1982 | const struct nft_table *table, |
1983 | const struct nft_chain *chain, | |
1984 | const struct nft_rule *rule) | |
1985 | { | |
1986 | struct nlmsghdr *nlh; | |
1987 | struct nfgenmsg *nfmsg; | |
1988 | const struct nft_expr *expr, *next; | |
1989 | struct nlattr *list; | |
5e948466 | 1990 | const struct nft_rule *prule; |
dedb67c4 | 1991 | u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); |
96518518 | 1992 | |
dedb67c4 | 1993 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), flags); |
96518518 PM |
1994 | if (nlh == NULL) |
1995 | goto nla_put_failure; | |
1996 | ||
1997 | nfmsg = nlmsg_data(nlh); | |
1998 | nfmsg->nfgen_family = family; | |
1999 | nfmsg->version = NFNETLINK_V0; | |
84d7fce6 | 2000 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
96518518 PM |
2001 | |
2002 | if (nla_put_string(skb, NFTA_RULE_TABLE, table->name)) | |
2003 | goto nla_put_failure; | |
2004 | if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name)) | |
2005 | goto nla_put_failure; | |
b46f6ded ND |
2006 | if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle), |
2007 | NFTA_RULE_PAD)) | |
96518518 PM |
2008 | goto nla_put_failure; |
2009 | ||
5e948466 | 2010 | if ((event != NFT_MSG_DELRULE) && (rule->list.prev != &chain->rules)) { |
cbbb40e2 | 2011 | prule = list_prev_entry(rule, list); |
5e948466 | 2012 | if (nla_put_be64(skb, NFTA_RULE_POSITION, |
b46f6ded ND |
2013 | cpu_to_be64(prule->handle), |
2014 | NFTA_RULE_PAD)) | |
5e948466 EL |
2015 | goto nla_put_failure; |
2016 | } | |
2017 | ||
96518518 PM |
2018 | list = nla_nest_start(skb, NFTA_RULE_EXPRESSIONS); |
2019 | if (list == NULL) | |
2020 | goto nla_put_failure; | |
2021 | nft_rule_for_each_expr(expr, next, rule) { | |
0b2d8a7b | 2022 | if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0) |
96518518 | 2023 | goto nla_put_failure; |
96518518 PM |
2024 | } |
2025 | nla_nest_end(skb, list); | |
2026 | ||
86f1ec32 PM |
2027 | if (rule->udata) { |
2028 | struct nft_userdata *udata = nft_userdata(rule); | |
2029 | if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1, | |
2030 | udata->data) < 0) | |
2031 | goto nla_put_failure; | |
2032 | } | |
0768b3b3 | 2033 | |
053c095a JB |
2034 | nlmsg_end(skb, nlh); |
2035 | return 0; | |
96518518 PM |
2036 | |
2037 | nla_put_failure: | |
2038 | nlmsg_trim(skb, nlh); | |
2039 | return -1; | |
2040 | } | |
2041 | ||
25e94a99 PNA |
2042 | static void nf_tables_rule_notify(const struct nft_ctx *ctx, |
2043 | const struct nft_rule *rule, int event) | |
96518518 PM |
2044 | { |
2045 | struct sk_buff *skb; | |
96518518 PM |
2046 | int err; |
2047 | ||
128ad332 PNA |
2048 | if (!ctx->report && |
2049 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) | |
25e94a99 | 2050 | return; |
96518518 | 2051 | |
96518518 PM |
2052 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
2053 | if (skb == NULL) | |
2054 | goto err; | |
2055 | ||
84d7fce6 | 2056 | err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq, |
36596dad | 2057 | event, 0, ctx->family, ctx->table, |
35151d84 | 2058 | ctx->chain, rule); |
96518518 PM |
2059 | if (err < 0) { |
2060 | kfree_skb(skb); | |
2061 | goto err; | |
2062 | } | |
2063 | ||
25e94a99 PNA |
2064 | nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, |
2065 | ctx->report, GFP_KERNEL); | |
2066 | return; | |
96518518 | 2067 | err: |
25e94a99 | 2068 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS); |
96518518 PM |
2069 | } |
2070 | ||
6e1f760e | 2071 | struct nft_rule_dump_ctx { |
e46abbcc | 2072 | char *table; |
b7263e07 | 2073 | char *chain; |
6e1f760e PNA |
2074 | }; |
2075 | ||
96518518 PM |
2076 | static int nf_tables_dump_rules(struct sk_buff *skb, |
2077 | struct netlink_callback *cb) | |
2078 | { | |
2079 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
6e1f760e | 2080 | const struct nft_rule_dump_ctx *ctx = cb->data; |
96518518 PM |
2081 | const struct nft_table *table; |
2082 | const struct nft_chain *chain; | |
2083 | const struct nft_rule *rule; | |
2084 | unsigned int idx = 0, s_idx = cb->args[0]; | |
99633ab2 | 2085 | struct net *net = sock_net(skb->sk); |
96518518 PM |
2086 | int family = nfmsg->nfgen_family; |
2087 | ||
e688a7f8 | 2088 | rcu_read_lock(); |
38e029f1 PNA |
2089 | cb->seq = net->nft.base_seq; |
2090 | ||
36596dad | 2091 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
98319cb9 | 2092 | if (family != NFPROTO_UNSPEC && family != table->family) |
36596dad PNA |
2093 | continue; |
2094 | ||
2095 | if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0) | |
96518518 PM |
2096 | continue; |
2097 | ||
36596dad PNA |
2098 | list_for_each_entry_rcu(chain, &table->chains, list) { |
2099 | if (ctx && ctx->chain && | |
2100 | strcmp(ctx->chain, chain->name) != 0) | |
6e1f760e PNA |
2101 | continue; |
2102 | ||
36596dad PNA |
2103 | list_for_each_entry_rcu(rule, &chain->rules, list) { |
2104 | if (!nft_is_active(net, rule)) | |
2105 | goto cont; | |
2106 | if (idx < s_idx) | |
2107 | goto cont; | |
2108 | if (idx > s_idx) | |
2109 | memset(&cb->args[1], 0, | |
2110 | sizeof(cb->args) - sizeof(cb->args[0])); | |
2111 | if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid, | |
2112 | cb->nlh->nlmsg_seq, | |
2113 | NFT_MSG_NEWRULE, | |
2114 | NLM_F_MULTI | NLM_F_APPEND, | |
98319cb9 | 2115 | table->family, |
36596dad PNA |
2116 | table, chain, rule) < 0) |
2117 | goto done; | |
2118 | ||
2119 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
96518518 | 2120 | cont: |
36596dad | 2121 | idx++; |
96518518 PM |
2122 | } |
2123 | } | |
2124 | } | |
2125 | done: | |
e688a7f8 PNA |
2126 | rcu_read_unlock(); |
2127 | ||
96518518 PM |
2128 | cb->args[0] = idx; |
2129 | return skb->len; | |
2130 | } | |
2131 | ||
6e1f760e PNA |
2132 | static int nf_tables_dump_rules_done(struct netlink_callback *cb) |
2133 | { | |
e46abbcc PS |
2134 | struct nft_rule_dump_ctx *ctx = cb->data; |
2135 | ||
2136 | if (ctx) { | |
2137 | kfree(ctx->table); | |
b7263e07 | 2138 | kfree(ctx->chain); |
e46abbcc PS |
2139 | kfree(ctx); |
2140 | } | |
6e1f760e PNA |
2141 | return 0; |
2142 | } | |
2143 | ||
7b8002a1 PNA |
2144 | static int nf_tables_getrule(struct net *net, struct sock *nlsk, |
2145 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2146 | const struct nlattr * const nla[], |
2147 | struct netlink_ext_ack *extack) | |
96518518 PM |
2148 | { |
2149 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 2150 | u8 genmask = nft_genmask_cur(net); |
96518518 PM |
2151 | const struct nft_table *table; |
2152 | const struct nft_chain *chain; | |
2153 | const struct nft_rule *rule; | |
2154 | struct sk_buff *skb2; | |
2155 | int family = nfmsg->nfgen_family; | |
2156 | int err; | |
2157 | ||
2158 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
2159 | struct netlink_dump_control c = { | |
2160 | .dump = nf_tables_dump_rules, | |
6e1f760e | 2161 | .done = nf_tables_dump_rules_done, |
96518518 | 2162 | }; |
6e1f760e PNA |
2163 | |
2164 | if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) { | |
2165 | struct nft_rule_dump_ctx *ctx; | |
2166 | ||
2167 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
2168 | if (!ctx) | |
2169 | return -ENOMEM; | |
2170 | ||
e46abbcc PS |
2171 | if (nla[NFTA_RULE_TABLE]) { |
2172 | ctx->table = nla_strdup(nla[NFTA_RULE_TABLE], | |
2173 | GFP_KERNEL); | |
2174 | if (!ctx->table) { | |
2175 | kfree(ctx); | |
2176 | return -ENOMEM; | |
2177 | } | |
2178 | } | |
b7263e07 PS |
2179 | if (nla[NFTA_RULE_CHAIN]) { |
2180 | ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN], | |
2181 | GFP_KERNEL); | |
2182 | if (!ctx->chain) { | |
2183 | kfree(ctx->table); | |
2184 | kfree(ctx); | |
2185 | return -ENOMEM; | |
2186 | } | |
2187 | } | |
6e1f760e PNA |
2188 | c.data = ctx; |
2189 | } | |
2190 | ||
96518518 PM |
2191 | return netlink_dump_start(nlsk, skb, nlh, &c); |
2192 | } | |
2193 | ||
98319cb9 | 2194 | table = nf_tables_table_lookup(net, nla[NFTA_RULE_TABLE], family, |
36596dad | 2195 | genmask); |
96518518 PM |
2196 | if (IS_ERR(table)) |
2197 | return PTR_ERR(table); | |
2198 | ||
664b0f8c | 2199 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], genmask); |
96518518 PM |
2200 | if (IS_ERR(chain)) |
2201 | return PTR_ERR(chain); | |
2202 | ||
2203 | rule = nf_tables_rule_lookup(chain, nla[NFTA_RULE_HANDLE]); | |
2204 | if (IS_ERR(rule)) | |
2205 | return PTR_ERR(rule); | |
2206 | ||
2207 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
2208 | if (!skb2) | |
2209 | return -ENOMEM; | |
2210 | ||
84d7fce6 | 2211 | err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid, |
96518518 PM |
2212 | nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0, |
2213 | family, table, chain, rule); | |
2214 | if (err < 0) | |
2215 | goto err; | |
2216 | ||
2217 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
2218 | ||
2219 | err: | |
2220 | kfree_skb(skb2); | |
2221 | return err; | |
2222 | } | |
2223 | ||
62472bce PM |
2224 | static void nf_tables_rule_destroy(const struct nft_ctx *ctx, |
2225 | struct nft_rule *rule) | |
96518518 | 2226 | { |
96518518 PM |
2227 | struct nft_expr *expr; |
2228 | ||
2229 | /* | |
2230 | * Careful: some expressions might not be initialized in case this | |
2231 | * is called on error from nf_tables_newrule(). | |
2232 | */ | |
2233 | expr = nft_expr_first(rule); | |
3e38df13 | 2234 | while (expr != nft_expr_last(rule) && expr->ops) { |
62472bce | 2235 | nf_tables_expr_destroy(ctx, expr); |
96518518 PM |
2236 | expr = nft_expr_next(expr); |
2237 | } | |
2238 | kfree(rule); | |
2239 | } | |
2240 | ||
1081d11b PNA |
2241 | #define NFT_RULE_MAXEXPRS 128 |
2242 | ||
2243 | static struct nft_expr_info *info; | |
2244 | ||
633c9a84 PNA |
2245 | static int nf_tables_newrule(struct net *net, struct sock *nlsk, |
2246 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2247 | const struct nlattr * const nla[], |
2248 | struct netlink_ext_ack *extack) | |
96518518 PM |
2249 | { |
2250 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 2251 | u8 genmask = nft_genmask_next(net); |
98319cb9 | 2252 | int family = nfmsg->nfgen_family; |
96518518 PM |
2253 | struct nft_table *table; |
2254 | struct nft_chain *chain; | |
2255 | struct nft_rule *rule, *old_rule = NULL; | |
86f1ec32 | 2256 | struct nft_userdata *udata; |
1081d11b | 2257 | struct nft_trans *trans = NULL; |
96518518 PM |
2258 | struct nft_expr *expr; |
2259 | struct nft_ctx ctx; | |
2260 | struct nlattr *tmp; | |
86f1ec32 | 2261 | unsigned int size, i, n, ulen = 0, usize = 0; |
96518518 PM |
2262 | int err, rem; |
2263 | bool create; | |
5e948466 | 2264 | u64 handle, pos_handle; |
96518518 PM |
2265 | |
2266 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; | |
2267 | ||
98319cb9 | 2268 | table = nf_tables_table_lookup(net, nla[NFTA_RULE_TABLE], family, |
36596dad | 2269 | genmask); |
96518518 PM |
2270 | if (IS_ERR(table)) |
2271 | return PTR_ERR(table); | |
2272 | ||
664b0f8c | 2273 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], genmask); |
96518518 PM |
2274 | if (IS_ERR(chain)) |
2275 | return PTR_ERR(chain); | |
2276 | ||
2277 | if (nla[NFTA_RULE_HANDLE]) { | |
2278 | handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE])); | |
2279 | rule = __nf_tables_rule_lookup(chain, handle); | |
2280 | if (IS_ERR(rule)) | |
2281 | return PTR_ERR(rule); | |
2282 | ||
2283 | if (nlh->nlmsg_flags & NLM_F_EXCL) | |
2284 | return -EEXIST; | |
2285 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
2286 | old_rule = rule; | |
2287 | else | |
2288 | return -EOPNOTSUPP; | |
2289 | } else { | |
2290 | if (!create || nlh->nlmsg_flags & NLM_F_REPLACE) | |
2291 | return -EINVAL; | |
2292 | handle = nf_tables_alloc_handle(table); | |
a0a7379e PNA |
2293 | |
2294 | if (chain->use == UINT_MAX) | |
2295 | return -EOVERFLOW; | |
96518518 PM |
2296 | } |
2297 | ||
5e948466 EL |
2298 | if (nla[NFTA_RULE_POSITION]) { |
2299 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) | |
2300 | return -EOPNOTSUPP; | |
2301 | ||
2302 | pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION])); | |
2303 | old_rule = __nf_tables_rule_lookup(chain, pos_handle); | |
2304 | if (IS_ERR(old_rule)) | |
2305 | return PTR_ERR(old_rule); | |
2306 | } | |
2307 | ||
98319cb9 | 2308 | nft_ctx_init(&ctx, net, skb, nlh, family, table, chain, nla); |
0ca743a5 | 2309 | |
96518518 PM |
2310 | n = 0; |
2311 | size = 0; | |
2312 | if (nla[NFTA_RULE_EXPRESSIONS]) { | |
2313 | nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) { | |
2314 | err = -EINVAL; | |
2315 | if (nla_type(tmp) != NFTA_LIST_ELEM) | |
2316 | goto err1; | |
2317 | if (n == NFT_RULE_MAXEXPRS) | |
2318 | goto err1; | |
0ca743a5 | 2319 | err = nf_tables_expr_parse(&ctx, tmp, &info[n]); |
96518518 PM |
2320 | if (err < 0) |
2321 | goto err1; | |
2322 | size += info[n].ops->size; | |
2323 | n++; | |
2324 | } | |
2325 | } | |
9889840f PM |
2326 | /* Check for overflow of dlen field */ |
2327 | err = -EFBIG; | |
2328 | if (size >= 1 << 12) | |
2329 | goto err1; | |
96518518 | 2330 | |
86f1ec32 | 2331 | if (nla[NFTA_RULE_USERDATA]) { |
0768b3b3 | 2332 | ulen = nla_len(nla[NFTA_RULE_USERDATA]); |
86f1ec32 PM |
2333 | if (ulen > 0) |
2334 | usize = sizeof(struct nft_userdata) + ulen; | |
2335 | } | |
0768b3b3 | 2336 | |
96518518 | 2337 | err = -ENOMEM; |
86f1ec32 | 2338 | rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL); |
96518518 PM |
2339 | if (rule == NULL) |
2340 | goto err1; | |
2341 | ||
889f7ee7 | 2342 | nft_activate_next(net, rule); |
0628b123 | 2343 | |
96518518 PM |
2344 | rule->handle = handle; |
2345 | rule->dlen = size; | |
86f1ec32 | 2346 | rule->udata = ulen ? 1 : 0; |
0768b3b3 | 2347 | |
86f1ec32 PM |
2348 | if (ulen) { |
2349 | udata = nft_userdata(rule); | |
2350 | udata->len = ulen - 1; | |
2351 | nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen); | |
2352 | } | |
96518518 | 2353 | |
96518518 PM |
2354 | expr = nft_expr_first(rule); |
2355 | for (i = 0; i < n; i++) { | |
2356 | err = nf_tables_newexpr(&ctx, &info[i], expr); | |
2357 | if (err < 0) | |
2358 | goto err2; | |
ef1f7df9 | 2359 | info[i].ops = NULL; |
96518518 PM |
2360 | expr = nft_expr_next(expr); |
2361 | } | |
2362 | ||
96518518 | 2363 | if (nlh->nlmsg_flags & NLM_F_REPLACE) { |
889f7ee7 | 2364 | if (nft_is_active_next(net, old_rule)) { |
ac904ac8 | 2365 | trans = nft_trans_rule_add(&ctx, NFT_MSG_DELRULE, |
b380e5c7 | 2366 | old_rule); |
1081d11b | 2367 | if (trans == NULL) { |
0628b123 PNA |
2368 | err = -ENOMEM; |
2369 | goto err2; | |
2370 | } | |
889f7ee7 | 2371 | nft_deactivate_next(net, old_rule); |
ac34b861 | 2372 | chain->use--; |
5bc5c307 | 2373 | list_add_tail_rcu(&rule->list, &old_rule->list); |
0628b123 PNA |
2374 | } else { |
2375 | err = -ENOENT; | |
2376 | goto err2; | |
2377 | } | |
96518518 | 2378 | } else if (nlh->nlmsg_flags & NLM_F_APPEND) |
5e948466 EL |
2379 | if (old_rule) |
2380 | list_add_rcu(&rule->list, &old_rule->list); | |
2381 | else | |
2382 | list_add_tail_rcu(&rule->list, &chain->rules); | |
2383 | else { | |
2384 | if (old_rule) | |
2385 | list_add_tail_rcu(&rule->list, &old_rule->list); | |
2386 | else | |
2387 | list_add_rcu(&rule->list, &chain->rules); | |
2388 | } | |
96518518 | 2389 | |
b380e5c7 | 2390 | if (nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule) == NULL) { |
0628b123 PNA |
2391 | err = -ENOMEM; |
2392 | goto err3; | |
2393 | } | |
4fefee57 | 2394 | chain->use++; |
96518518 PM |
2395 | return 0; |
2396 | ||
0628b123 PNA |
2397 | err3: |
2398 | list_del_rcu(&rule->list); | |
96518518 | 2399 | err2: |
62472bce | 2400 | nf_tables_rule_destroy(&ctx, rule); |
96518518 PM |
2401 | err1: |
2402 | for (i = 0; i < n; i++) { | |
2403 | if (info[i].ops != NULL) | |
ef1f7df9 | 2404 | module_put(info[i].ops->type->owner); |
96518518 PM |
2405 | } |
2406 | return err; | |
2407 | } | |
2408 | ||
1a94e38d PNA |
2409 | static struct nft_rule *nft_rule_lookup_byid(const struct net *net, |
2410 | const struct nlattr *nla) | |
2411 | { | |
2412 | u32 id = ntohl(nla_get_be32(nla)); | |
2413 | struct nft_trans *trans; | |
2414 | ||
2415 | list_for_each_entry(trans, &net->nft.commit_list, list) { | |
2416 | struct nft_rule *rule = nft_trans_rule(trans); | |
2417 | ||
2418 | if (trans->msg_type == NFT_MSG_NEWRULE && | |
2419 | id == nft_trans_rule_id(trans)) | |
2420 | return rule; | |
2421 | } | |
2422 | return ERR_PTR(-ENOENT); | |
2423 | } | |
2424 | ||
633c9a84 PNA |
2425 | static int nf_tables_delrule(struct net *net, struct sock *nlsk, |
2426 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2427 | const struct nlattr * const nla[], |
2428 | struct netlink_ext_ack *extack) | |
96518518 PM |
2429 | { |
2430 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 2431 | u8 genmask = nft_genmask_next(net); |
7c95f6d8 | 2432 | struct nft_table *table; |
cf9dc09d PNA |
2433 | struct nft_chain *chain = NULL; |
2434 | struct nft_rule *rule; | |
0628b123 PNA |
2435 | int family = nfmsg->nfgen_family, err = 0; |
2436 | struct nft_ctx ctx; | |
96518518 | 2437 | |
98319cb9 | 2438 | table = nf_tables_table_lookup(net, nla[NFTA_RULE_TABLE], family, |
36596dad | 2439 | genmask); |
96518518 PM |
2440 | if (IS_ERR(table)) |
2441 | return PTR_ERR(table); | |
2442 | ||
cf9dc09d | 2443 | if (nla[NFTA_RULE_CHAIN]) { |
664b0f8c PNA |
2444 | chain = nf_tables_chain_lookup(table, nla[NFTA_RULE_CHAIN], |
2445 | genmask); | |
cf9dc09d PNA |
2446 | if (IS_ERR(chain)) |
2447 | return PTR_ERR(chain); | |
2448 | } | |
96518518 | 2449 | |
98319cb9 | 2450 | nft_ctx_init(&ctx, net, skb, nlh, family, table, chain, nla); |
0628b123 | 2451 | |
cf9dc09d PNA |
2452 | if (chain) { |
2453 | if (nla[NFTA_RULE_HANDLE]) { | |
2454 | rule = nf_tables_rule_lookup(chain, | |
2455 | nla[NFTA_RULE_HANDLE]); | |
2456 | if (IS_ERR(rule)) | |
2457 | return PTR_ERR(rule); | |
96518518 | 2458 | |
1a94e38d PNA |
2459 | err = nft_delrule(&ctx, rule); |
2460 | } else if (nla[NFTA_RULE_ID]) { | |
2461 | rule = nft_rule_lookup_byid(net, nla[NFTA_RULE_ID]); | |
2462 | if (IS_ERR(rule)) | |
2463 | return PTR_ERR(rule); | |
2464 | ||
5e266fe7 | 2465 | err = nft_delrule(&ctx, rule); |
cf9dc09d | 2466 | } else { |
ce24b721 | 2467 | err = nft_delrule_by_chain(&ctx); |
cf9dc09d PNA |
2468 | } |
2469 | } else { | |
2470 | list_for_each_entry(chain, &table->chains, list) { | |
664b0f8c PNA |
2471 | if (!nft_is_active_next(net, chain)) |
2472 | continue; | |
2473 | ||
cf9dc09d | 2474 | ctx.chain = chain; |
ce24b721 | 2475 | err = nft_delrule_by_chain(&ctx); |
0628b123 PNA |
2476 | if (err < 0) |
2477 | break; | |
2478 | } | |
2479 | } | |
2480 | ||
2481 | return err; | |
2482 | } | |
2483 | ||
20a69341 PM |
2484 | /* |
2485 | * Sets | |
2486 | */ | |
2487 | ||
2b664957 | 2488 | static LIST_HEAD(nf_tables_set_types); |
20a69341 | 2489 | |
2b664957 | 2490 | int nft_register_set(struct nft_set_type *type) |
20a69341 PM |
2491 | { |
2492 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
2b664957 | 2493 | list_add_tail_rcu(&type->list, &nf_tables_set_types); |
20a69341 PM |
2494 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
2495 | return 0; | |
2496 | } | |
2497 | EXPORT_SYMBOL_GPL(nft_register_set); | |
2498 | ||
2b664957 | 2499 | void nft_unregister_set(struct nft_set_type *type) |
20a69341 PM |
2500 | { |
2501 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
2b664957 | 2502 | list_del_rcu(&type->list); |
20a69341 PM |
2503 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
2504 | } | |
2505 | EXPORT_SYMBOL_GPL(nft_unregister_set); | |
2506 | ||
2b664957 PNA |
2507 | #define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \ |
2508 | NFT_SET_TIMEOUT | NFT_SET_OBJECT) | |
2509 | ||
2510 | static bool nft_set_ops_candidate(const struct nft_set_ops *ops, u32 flags) | |
2511 | { | |
4f2921ca FW |
2512 | if ((flags & NFT_SET_EVAL) && !ops->update) |
2513 | return false; | |
2514 | ||
2b664957 PNA |
2515 | return (flags & ops->features) == (flags & NFT_SET_FEATURES); |
2516 | } | |
2517 | ||
c50b960c PM |
2518 | /* |
2519 | * Select a set implementation based on the data characteristics and the | |
2520 | * given policy. The total memory use might not be known if no size is | |
2521 | * given, in that case the amount of memory per element is used. | |
2522 | */ | |
2523 | static const struct nft_set_ops * | |
2b664957 PNA |
2524 | nft_select_set_ops(const struct nft_ctx *ctx, |
2525 | const struct nlattr * const nla[], | |
c50b960c PM |
2526 | const struct nft_set_desc *desc, |
2527 | enum nft_set_policies policy) | |
20a69341 | 2528 | { |
c50b960c PM |
2529 | const struct nft_set_ops *ops, *bops; |
2530 | struct nft_set_estimate est, best; | |
2b664957 PNA |
2531 | const struct nft_set_type *type; |
2532 | u32 flags = 0; | |
20a69341 PM |
2533 | |
2534 | #ifdef CONFIG_MODULES | |
2b664957 | 2535 | if (list_empty(&nf_tables_set_types)) { |
20a69341 PM |
2536 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); |
2537 | request_module("nft-set"); | |
2538 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
2b664957 | 2539 | if (!list_empty(&nf_tables_set_types)) |
20a69341 PM |
2540 | return ERR_PTR(-EAGAIN); |
2541 | } | |
2542 | #endif | |
2b664957 PNA |
2543 | if (nla[NFTA_SET_FLAGS] != NULL) |
2544 | flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); | |
20a69341 | 2545 | |
55af753c PNA |
2546 | bops = NULL; |
2547 | best.size = ~0; | |
2548 | best.lookup = ~0; | |
0b5a7874 | 2549 | best.space = ~0; |
c50b960c | 2550 | |
2b664957 PNA |
2551 | list_for_each_entry(type, &nf_tables_set_types, list) { |
2552 | if (!type->select_ops) | |
2553 | ops = type->ops; | |
2554 | else | |
2555 | ops = type->select_ops(ctx, desc, flags); | |
2556 | if (!ops) | |
2557 | continue; | |
2558 | ||
2559 | if (!nft_set_ops_candidate(ops, flags)) | |
20a69341 | 2560 | continue; |
2b664957 | 2561 | if (!ops->estimate(desc, flags, &est)) |
c50b960c PM |
2562 | continue; |
2563 | ||
2564 | switch (policy) { | |
2565 | case NFT_SET_POL_PERFORMANCE: | |
55af753c | 2566 | if (est.lookup < best.lookup) |
c50b960c | 2567 | break; |
644e334e PNA |
2568 | if (est.lookup == best.lookup && |
2569 | est.space < best.space) | |
2570 | break; | |
c50b960c PM |
2571 | continue; |
2572 | case NFT_SET_POL_MEMORY: | |
0b5a7874 PNA |
2573 | if (!desc->size) { |
2574 | if (est.space < best.space) | |
2575 | break; | |
2576 | if (est.space == best.space && | |
2577 | est.lookup < best.lookup) | |
2578 | break; | |
4f2921ca | 2579 | } else if (est.size < best.size || !bops) { |
c50b960c | 2580 | break; |
0b5a7874 | 2581 | } |
c50b960c PM |
2582 | continue; |
2583 | default: | |
2584 | break; | |
2585 | } | |
2586 | ||
2b664957 | 2587 | if (!try_module_get(type->owner)) |
20a69341 | 2588 | continue; |
c50b960c | 2589 | if (bops != NULL) |
2b664957 | 2590 | module_put(bops->type->owner); |
c50b960c PM |
2591 | |
2592 | bops = ops; | |
2593 | best = est; | |
20a69341 PM |
2594 | } |
2595 | ||
c50b960c PM |
2596 | if (bops != NULL) |
2597 | return bops; | |
2598 | ||
20a69341 PM |
2599 | return ERR_PTR(-EOPNOTSUPP); |
2600 | } | |
2601 | ||
2602 | static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = { | |
b2fbd044 LZ |
2603 | [NFTA_SET_TABLE] = { .type = NLA_STRING, |
2604 | .len = NFT_TABLE_MAXNAMELEN - 1 }, | |
a9bdd836 | 2605 | [NFTA_SET_NAME] = { .type = NLA_STRING, |
cb39ad8b | 2606 | .len = NFT_SET_MAXNAMELEN - 1 }, |
20a69341 PM |
2607 | [NFTA_SET_FLAGS] = { .type = NLA_U32 }, |
2608 | [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 }, | |
2609 | [NFTA_SET_KEY_LEN] = { .type = NLA_U32 }, | |
2610 | [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 }, | |
2611 | [NFTA_SET_DATA_LEN] = { .type = NLA_U32 }, | |
c50b960c PM |
2612 | [NFTA_SET_POLICY] = { .type = NLA_U32 }, |
2613 | [NFTA_SET_DESC] = { .type = NLA_NESTED }, | |
958bee14 | 2614 | [NFTA_SET_ID] = { .type = NLA_U32 }, |
761da293 PM |
2615 | [NFTA_SET_TIMEOUT] = { .type = NLA_U64 }, |
2616 | [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 }, | |
e6d8ecac CFG |
2617 | [NFTA_SET_USERDATA] = { .type = NLA_BINARY, |
2618 | .len = NFT_USERDATA_MAXLEN }, | |
8aeff920 | 2619 | [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 }, |
3ecbfd65 | 2620 | [NFTA_SET_HANDLE] = { .type = NLA_U64 }, |
c50b960c PM |
2621 | }; |
2622 | ||
2623 | static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = { | |
2624 | [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 }, | |
20a69341 PM |
2625 | }; |
2626 | ||
633c9a84 | 2627 | static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, struct net *net, |
20a69341 PM |
2628 | const struct sk_buff *skb, |
2629 | const struct nlmsghdr *nlh, | |
f2a6d766 PNA |
2630 | const struct nlattr * const nla[], |
2631 | u8 genmask) | |
20a69341 PM |
2632 | { |
2633 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
98319cb9 | 2634 | int family = nfmsg->nfgen_family; |
7c95f6d8 | 2635 | struct nft_table *table = NULL; |
20a69341 | 2636 | |
20a69341 | 2637 | if (nla[NFTA_SET_TABLE] != NULL) { |
36596dad | 2638 | table = nf_tables_table_lookup(net, nla[NFTA_SET_TABLE], |
98319cb9 | 2639 | family, genmask); |
20a69341 PM |
2640 | if (IS_ERR(table)) |
2641 | return PTR_ERR(table); | |
2642 | } | |
2643 | ||
98319cb9 | 2644 | nft_ctx_init(ctx, net, skb, nlh, family, table, NULL, nla); |
20a69341 PM |
2645 | return 0; |
2646 | } | |
2647 | ||
c7a72e3f PNA |
2648 | static struct nft_set *nf_tables_set_lookup(const struct nft_table *table, |
2649 | const struct nlattr *nla, u8 genmask) | |
20a69341 PM |
2650 | { |
2651 | struct nft_set *set; | |
2652 | ||
2653 | if (nla == NULL) | |
2654 | return ERR_PTR(-EINVAL); | |
2655 | ||
2656 | list_for_each_entry(set, &table->sets, list) { | |
37a9cc52 PNA |
2657 | if (!nla_strcmp(nla, set->name) && |
2658 | nft_active_genmask(set, genmask)) | |
20a69341 PM |
2659 | return set; |
2660 | } | |
2661 | return ERR_PTR(-ENOENT); | |
2662 | } | |
2663 | ||
3ecbfd65 HS |
2664 | static struct nft_set *nf_tables_set_lookup_byhandle(const struct nft_table *table, |
2665 | const struct nlattr *nla, u8 genmask) | |
2666 | { | |
2667 | struct nft_set *set; | |
2668 | ||
2669 | if (nla == NULL) | |
2670 | return ERR_PTR(-EINVAL); | |
2671 | ||
2672 | list_for_each_entry(set, &table->sets, list) { | |
2673 | if (be64_to_cpu(nla_get_be64(nla)) == set->handle && | |
2674 | nft_active_genmask(set, genmask)) | |
2675 | return set; | |
2676 | } | |
2677 | return ERR_PTR(-ENOENT); | |
2678 | } | |
2679 | ||
c7a72e3f PNA |
2680 | static struct nft_set *nf_tables_set_lookup_byid(const struct net *net, |
2681 | const struct nlattr *nla, | |
2682 | u8 genmask) | |
958bee14 PNA |
2683 | { |
2684 | struct nft_trans *trans; | |
2685 | u32 id = ntohl(nla_get_be32(nla)); | |
2686 | ||
2687 | list_for_each_entry(trans, &net->nft.commit_list, list) { | |
37a9cc52 PNA |
2688 | struct nft_set *set = nft_trans_set(trans); |
2689 | ||
958bee14 | 2690 | if (trans->msg_type == NFT_MSG_NEWSET && |
37a9cc52 PNA |
2691 | id == nft_trans_set_id(trans) && |
2692 | nft_active_genmask(set, genmask)) | |
2693 | return set; | |
958bee14 PNA |
2694 | } |
2695 | return ERR_PTR(-ENOENT); | |
2696 | } | |
c7a72e3f | 2697 | |
10659cba PNA |
2698 | struct nft_set *nft_set_lookup_global(const struct net *net, |
2699 | const struct nft_table *table, | |
2700 | const struct nlattr *nla_set_name, | |
2701 | const struct nlattr *nla_set_id, | |
2702 | u8 genmask) | |
c7a72e3f PNA |
2703 | { |
2704 | struct nft_set *set; | |
2705 | ||
2706 | set = nf_tables_set_lookup(table, nla_set_name, genmask); | |
2707 | if (IS_ERR(set)) { | |
2708 | if (!nla_set_id) | |
2709 | return set; | |
2710 | ||
2711 | set = nf_tables_set_lookup_byid(net, nla_set_id, genmask); | |
2712 | } | |
2713 | return set; | |
2714 | } | |
10659cba | 2715 | EXPORT_SYMBOL_GPL(nft_set_lookup_global); |
958bee14 | 2716 | |
20a69341 PM |
2717 | static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set, |
2718 | const char *name) | |
2719 | { | |
2720 | const struct nft_set *i; | |
2721 | const char *p; | |
2722 | unsigned long *inuse; | |
60eb1894 | 2723 | unsigned int n = 0, min = 0; |
20a69341 | 2724 | |
38745490 | 2725 | p = strchr(name, '%'); |
20a69341 PM |
2726 | if (p != NULL) { |
2727 | if (p[1] != 'd' || strchr(p + 2, '%')) | |
2728 | return -EINVAL; | |
2729 | ||
2730 | inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL); | |
2731 | if (inuse == NULL) | |
2732 | return -ENOMEM; | |
60eb1894 | 2733 | cont: |
20a69341 | 2734 | list_for_each_entry(i, &ctx->table->sets, list) { |
14662917 DB |
2735 | int tmp; |
2736 | ||
37a9cc52 PNA |
2737 | if (!nft_is_active_next(ctx->net, set)) |
2738 | continue; | |
14662917 | 2739 | if (!sscanf(i->name, name, &tmp)) |
20a69341 | 2740 | continue; |
60eb1894 | 2741 | if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE) |
20a69341 | 2742 | continue; |
14662917 | 2743 | |
60eb1894 | 2744 | set_bit(tmp - min, inuse); |
20a69341 PM |
2745 | } |
2746 | ||
53b70287 | 2747 | n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE); |
60eb1894 PM |
2748 | if (n >= BITS_PER_BYTE * PAGE_SIZE) { |
2749 | min += BITS_PER_BYTE * PAGE_SIZE; | |
2750 | memset(inuse, 0, PAGE_SIZE); | |
2751 | goto cont; | |
2752 | } | |
20a69341 PM |
2753 | free_page((unsigned long)inuse); |
2754 | } | |
2755 | ||
38745490 PS |
2756 | set->name = kasprintf(GFP_KERNEL, name, min + n); |
2757 | if (!set->name) | |
2758 | return -ENOMEM; | |
2759 | ||
20a69341 | 2760 | list_for_each_entry(i, &ctx->table->sets, list) { |
37a9cc52 PNA |
2761 | if (!nft_is_active_next(ctx->net, i)) |
2762 | continue; | |
e63aaaa6 AY |
2763 | if (!strcmp(set->name, i->name)) { |
2764 | kfree(set->name); | |
20a69341 | 2765 | return -ENFILE; |
e63aaaa6 | 2766 | } |
20a69341 PM |
2767 | } |
2768 | return 0; | |
2769 | } | |
2770 | ||
2771 | static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx, | |
2772 | const struct nft_set *set, u16 event, u16 flags) | |
2773 | { | |
2774 | struct nfgenmsg *nfmsg; | |
2775 | struct nlmsghdr *nlh; | |
c50b960c | 2776 | struct nlattr *desc; |
128ad332 PNA |
2777 | u32 portid = ctx->portid; |
2778 | u32 seq = ctx->seq; | |
20a69341 | 2779 | |
dedb67c4 | 2780 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); |
20a69341 PM |
2781 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
2782 | flags); | |
2783 | if (nlh == NULL) | |
2784 | goto nla_put_failure; | |
2785 | ||
2786 | nfmsg = nlmsg_data(nlh); | |
36596dad | 2787 | nfmsg->nfgen_family = ctx->family; |
20a69341 | 2788 | nfmsg->version = NFNETLINK_V0; |
84d7fce6 | 2789 | nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff); |
20a69341 PM |
2790 | |
2791 | if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name)) | |
2792 | goto nla_put_failure; | |
2793 | if (nla_put_string(skb, NFTA_SET_NAME, set->name)) | |
2794 | goto nla_put_failure; | |
3ecbfd65 HS |
2795 | if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle), |
2796 | NFTA_SET_PAD)) | |
2797 | goto nla_put_failure; | |
20a69341 PM |
2798 | if (set->flags != 0) |
2799 | if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags))) | |
2800 | goto nla_put_failure; | |
2801 | ||
2802 | if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype))) | |
2803 | goto nla_put_failure; | |
2804 | if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen))) | |
2805 | goto nla_put_failure; | |
2806 | if (set->flags & NFT_SET_MAP) { | |
2807 | if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype))) | |
2808 | goto nla_put_failure; | |
2809 | if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen))) | |
2810 | goto nla_put_failure; | |
2811 | } | |
8aeff920 PNA |
2812 | if (set->flags & NFT_SET_OBJECT && |
2813 | nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype))) | |
2814 | goto nla_put_failure; | |
20a69341 | 2815 | |
761da293 | 2816 | if (set->timeout && |
d3e2a111 AP |
2817 | nla_put_be64(skb, NFTA_SET_TIMEOUT, |
2818 | cpu_to_be64(jiffies_to_msecs(set->timeout)), | |
b46f6ded | 2819 | NFTA_SET_PAD)) |
761da293 PM |
2820 | goto nla_put_failure; |
2821 | if (set->gc_int && | |
2822 | nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int))) | |
2823 | goto nla_put_failure; | |
2824 | ||
9363dc4b AB |
2825 | if (set->policy != NFT_SET_POL_PERFORMANCE) { |
2826 | if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy))) | |
2827 | goto nla_put_failure; | |
2828 | } | |
2829 | ||
e6d8ecac CFG |
2830 | if (nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata)) |
2831 | goto nla_put_failure; | |
2832 | ||
c50b960c PM |
2833 | desc = nla_nest_start(skb, NFTA_SET_DESC); |
2834 | if (desc == NULL) | |
2835 | goto nla_put_failure; | |
2836 | if (set->size && | |
2837 | nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size))) | |
2838 | goto nla_put_failure; | |
2839 | nla_nest_end(skb, desc); | |
2840 | ||
053c095a JB |
2841 | nlmsg_end(skb, nlh); |
2842 | return 0; | |
20a69341 PM |
2843 | |
2844 | nla_put_failure: | |
2845 | nlmsg_trim(skb, nlh); | |
2846 | return -1; | |
2847 | } | |
2848 | ||
25e94a99 PNA |
2849 | static void nf_tables_set_notify(const struct nft_ctx *ctx, |
2850 | const struct nft_set *set, int event, | |
2851 | gfp_t gfp_flags) | |
20a69341 PM |
2852 | { |
2853 | struct sk_buff *skb; | |
128ad332 | 2854 | u32 portid = ctx->portid; |
20a69341 PM |
2855 | int err; |
2856 | ||
128ad332 PNA |
2857 | if (!ctx->report && |
2858 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) | |
25e94a99 | 2859 | return; |
20a69341 | 2860 | |
31f8441c | 2861 | skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags); |
20a69341 PM |
2862 | if (skb == NULL) |
2863 | goto err; | |
2864 | ||
2865 | err = nf_tables_fill_set(skb, ctx, set, event, 0); | |
2866 | if (err < 0) { | |
2867 | kfree_skb(skb); | |
2868 | goto err; | |
2869 | } | |
2870 | ||
25e94a99 PNA |
2871 | nfnetlink_send(skb, ctx->net, portid, NFNLGRP_NFTABLES, ctx->report, |
2872 | gfp_flags); | |
2873 | return; | |
20a69341 | 2874 | err: |
25e94a99 | 2875 | nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS); |
20a69341 PM |
2876 | } |
2877 | ||
5b96af77 | 2878 | static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb) |
c9c8e485 PNA |
2879 | { |
2880 | const struct nft_set *set; | |
2881 | unsigned int idx, s_idx = cb->args[0]; | |
c9c8e485 PNA |
2882 | struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2]; |
2883 | struct net *net = sock_net(skb->sk); | |
5b96af77 | 2884 | struct nft_ctx *ctx = cb->data, ctx_set; |
c9c8e485 PNA |
2885 | |
2886 | if (cb->args[1]) | |
2887 | return skb->len; | |
2888 | ||
e688a7f8 | 2889 | rcu_read_lock(); |
38e029f1 PNA |
2890 | cb->seq = net->nft.base_seq; |
2891 | ||
36596dad PNA |
2892 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
2893 | if (ctx->family != NFPROTO_UNSPEC && | |
98319cb9 | 2894 | ctx->family != table->family) |
36596dad PNA |
2895 | continue; |
2896 | ||
2897 | if (ctx->table && ctx->table != table) | |
5b96af77 PNA |
2898 | continue; |
2899 | ||
36596dad PNA |
2900 | if (cur_table) { |
2901 | if (cur_table != table) | |
c9c8e485 PNA |
2902 | continue; |
2903 | ||
36596dad | 2904 | cur_table = NULL; |
c9c8e485 | 2905 | } |
36596dad PNA |
2906 | idx = 0; |
2907 | list_for_each_entry_rcu(set, &table->sets, list) { | |
2908 | if (idx < s_idx) | |
2909 | goto cont; | |
2910 | if (!nft_is_active(net, set)) | |
2911 | goto cont; | |
5b96af77 | 2912 | |
36596dad PNA |
2913 | ctx_set = *ctx; |
2914 | ctx_set.table = table; | |
98319cb9 | 2915 | ctx_set.family = table->family; |
c9c8e485 | 2916 | |
36596dad PNA |
2917 | if (nf_tables_fill_set(skb, &ctx_set, set, |
2918 | NFT_MSG_NEWSET, | |
2919 | NLM_F_MULTI) < 0) { | |
2920 | cb->args[0] = idx; | |
2921 | cb->args[2] = (unsigned long) table; | |
2922 | goto done; | |
c9c8e485 | 2923 | } |
36596dad | 2924 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
c9c8e485 | 2925 | cont: |
36596dad | 2926 | idx++; |
c9c8e485 | 2927 | } |
36596dad PNA |
2928 | if (s_idx) |
2929 | s_idx = 0; | |
c9c8e485 PNA |
2930 | } |
2931 | cb->args[1] = 1; | |
2932 | done: | |
e688a7f8 | 2933 | rcu_read_unlock(); |
c9c8e485 PNA |
2934 | return skb->len; |
2935 | } | |
2936 | ||
5b96af77 | 2937 | static int nf_tables_dump_sets_done(struct netlink_callback *cb) |
20a69341 | 2938 | { |
5b96af77 PNA |
2939 | kfree(cb->data); |
2940 | return 0; | |
20a69341 PM |
2941 | } |
2942 | ||
7b8002a1 PNA |
2943 | static int nf_tables_getset(struct net *net, struct sock *nlsk, |
2944 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
2945 | const struct nlattr * const nla[], |
2946 | struct netlink_ext_ack *extack) | |
20a69341 | 2947 | { |
f2a6d766 | 2948 | u8 genmask = nft_genmask_cur(net); |
20a69341 PM |
2949 | const struct nft_set *set; |
2950 | struct nft_ctx ctx; | |
2951 | struct sk_buff *skb2; | |
c9c8e485 | 2952 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
20a69341 PM |
2953 | int err; |
2954 | ||
01cfa0a4 | 2955 | /* Verify existence before starting dump */ |
f2a6d766 | 2956 | err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla, genmask); |
20a69341 PM |
2957 | if (err < 0) |
2958 | return err; | |
2959 | ||
2960 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
2961 | struct netlink_dump_control c = { | |
2962 | .dump = nf_tables_dump_sets, | |
5b96af77 | 2963 | .done = nf_tables_dump_sets_done, |
20a69341 | 2964 | }; |
5b96af77 PNA |
2965 | struct nft_ctx *ctx_dump; |
2966 | ||
2967 | ctx_dump = kmalloc(sizeof(*ctx_dump), GFP_KERNEL); | |
2968 | if (ctx_dump == NULL) | |
2969 | return -ENOMEM; | |
2970 | ||
2971 | *ctx_dump = ctx; | |
2972 | c.data = ctx_dump; | |
2973 | ||
20a69341 PM |
2974 | return netlink_dump_start(nlsk, skb, nlh, &c); |
2975 | } | |
2976 | ||
c9c8e485 PNA |
2977 | /* Only accept unspec with dump */ |
2978 | if (nfmsg->nfgen_family == NFPROTO_UNSPEC) | |
2979 | return -EAFNOSUPPORT; | |
eaa2bcd6 PT |
2980 | if (!nla[NFTA_SET_TABLE]) |
2981 | return -EINVAL; | |
c9c8e485 | 2982 | |
37a9cc52 | 2983 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME], genmask); |
20a69341 PM |
2984 | if (IS_ERR(set)) |
2985 | return PTR_ERR(set); | |
2986 | ||
2987 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
2988 | if (skb2 == NULL) | |
2989 | return -ENOMEM; | |
2990 | ||
2991 | err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0); | |
2992 | if (err < 0) | |
2993 | goto err; | |
2994 | ||
2995 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
2996 | ||
2997 | err: | |
2998 | kfree_skb(skb2); | |
2999 | return err; | |
3000 | } | |
3001 | ||
c50b960c PM |
3002 | static int nf_tables_set_desc_parse(const struct nft_ctx *ctx, |
3003 | struct nft_set_desc *desc, | |
3004 | const struct nlattr *nla) | |
3005 | { | |
3006 | struct nlattr *da[NFTA_SET_DESC_MAX + 1]; | |
3007 | int err; | |
3008 | ||
fceb6435 JB |
3009 | err = nla_parse_nested(da, NFTA_SET_DESC_MAX, nla, |
3010 | nft_set_desc_policy, NULL); | |
c50b960c PM |
3011 | if (err < 0) |
3012 | return err; | |
3013 | ||
3014 | if (da[NFTA_SET_DESC_SIZE] != NULL) | |
3015 | desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE])); | |
3016 | ||
3017 | return 0; | |
3018 | } | |
3019 | ||
633c9a84 PNA |
3020 | static int nf_tables_newset(struct net *net, struct sock *nlsk, |
3021 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
3022 | const struct nlattr * const nla[], |
3023 | struct netlink_ext_ack *extack) | |
20a69341 PM |
3024 | { |
3025 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
f2a6d766 | 3026 | u8 genmask = nft_genmask_next(net); |
98319cb9 | 3027 | int family = nfmsg->nfgen_family; |
20a69341 | 3028 | const struct nft_set_ops *ops; |
20a69341 PM |
3029 | struct nft_table *table; |
3030 | struct nft_set *set; | |
3031 | struct nft_ctx ctx; | |
38745490 | 3032 | char *name; |
20a69341 PM |
3033 | unsigned int size; |
3034 | bool create; | |
761da293 | 3035 | u64 timeout; |
8aeff920 | 3036 | u32 ktype, dtype, flags, policy, gc_int, objtype; |
c50b960c | 3037 | struct nft_set_desc desc; |
e6d8ecac CFG |
3038 | unsigned char *udata; |
3039 | u16 udlen; | |
20a69341 PM |
3040 | int err; |
3041 | ||
3042 | if (nla[NFTA_SET_TABLE] == NULL || | |
3043 | nla[NFTA_SET_NAME] == NULL || | |
958bee14 PNA |
3044 | nla[NFTA_SET_KEY_LEN] == NULL || |
3045 | nla[NFTA_SET_ID] == NULL) | |
20a69341 PM |
3046 | return -EINVAL; |
3047 | ||
c50b960c PM |
3048 | memset(&desc, 0, sizeof(desc)); |
3049 | ||
20a69341 PM |
3050 | ktype = NFT_DATA_VALUE; |
3051 | if (nla[NFTA_SET_KEY_TYPE] != NULL) { | |
3052 | ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE])); | |
3053 | if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK) | |
3054 | return -EINVAL; | |
3055 | } | |
3056 | ||
c50b960c | 3057 | desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN])); |
7d740264 | 3058 | if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN) |
20a69341 PM |
3059 | return -EINVAL; |
3060 | ||
3061 | flags = 0; | |
3062 | if (nla[NFTA_SET_FLAGS] != NULL) { | |
3063 | flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS])); | |
3064 | if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT | | |
7c6c6e95 | 3065 | NFT_SET_INTERVAL | NFT_SET_TIMEOUT | |
8aeff920 PNA |
3066 | NFT_SET_MAP | NFT_SET_EVAL | |
3067 | NFT_SET_OBJECT)) | |
20a69341 | 3068 | return -EINVAL; |
8aeff920 PNA |
3069 | /* Only one of these operations is supported */ |
3070 | if ((flags & (NFT_SET_MAP | NFT_SET_EVAL | NFT_SET_OBJECT)) == | |
3071 | (NFT_SET_MAP | NFT_SET_EVAL | NFT_SET_OBJECT)) | |
7c6c6e95 | 3072 | return -EOPNOTSUPP; |
20a69341 PM |
3073 | } |
3074 | ||
3075 | dtype = 0; | |
20a69341 PM |
3076 | if (nla[NFTA_SET_DATA_TYPE] != NULL) { |
3077 | if (!(flags & NFT_SET_MAP)) | |
3078 | return -EINVAL; | |
3079 | ||
3080 | dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE])); | |
3081 | if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK && | |
3082 | dtype != NFT_DATA_VERDICT) | |
3083 | return -EINVAL; | |
3084 | ||
3085 | if (dtype != NFT_DATA_VERDICT) { | |
3086 | if (nla[NFTA_SET_DATA_LEN] == NULL) | |
3087 | return -EINVAL; | |
c50b960c | 3088 | desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN])); |
7d740264 | 3089 | if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN) |
20a69341 PM |
3090 | return -EINVAL; |
3091 | } else | |
7d740264 | 3092 | desc.dlen = sizeof(struct nft_verdict); |
20a69341 PM |
3093 | } else if (flags & NFT_SET_MAP) |
3094 | return -EINVAL; | |
3095 | ||
8aeff920 PNA |
3096 | if (nla[NFTA_SET_OBJ_TYPE] != NULL) { |
3097 | if (!(flags & NFT_SET_OBJECT)) | |
3098 | return -EINVAL; | |
3099 | ||
3100 | objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE])); | |
3101 | if (objtype == NFT_OBJECT_UNSPEC || | |
3102 | objtype > NFT_OBJECT_MAX) | |
3103 | return -EINVAL; | |
3104 | } else if (flags & NFT_SET_OBJECT) | |
3105 | return -EINVAL; | |
3106 | else | |
3107 | objtype = NFT_OBJECT_UNSPEC; | |
3108 | ||
761da293 PM |
3109 | timeout = 0; |
3110 | if (nla[NFTA_SET_TIMEOUT] != NULL) { | |
3111 | if (!(flags & NFT_SET_TIMEOUT)) | |
3112 | return -EINVAL; | |
d3e2a111 AP |
3113 | timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64( |
3114 | nla[NFTA_SET_TIMEOUT]))); | |
761da293 PM |
3115 | } |
3116 | gc_int = 0; | |
3117 | if (nla[NFTA_SET_GC_INTERVAL] != NULL) { | |
3118 | if (!(flags & NFT_SET_TIMEOUT)) | |
3119 | return -EINVAL; | |
3120 | gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL])); | |
3121 | } | |
3122 | ||
c50b960c PM |
3123 | policy = NFT_SET_POL_PERFORMANCE; |
3124 | if (nla[NFTA_SET_POLICY] != NULL) | |
3125 | policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY])); | |
3126 | ||
3127 | if (nla[NFTA_SET_DESC] != NULL) { | |
3128 | err = nf_tables_set_desc_parse(&ctx, &desc, nla[NFTA_SET_DESC]); | |
3129 | if (err < 0) | |
3130 | return err; | |
3131 | } | |
3132 | ||
20a69341 PM |
3133 | create = nlh->nlmsg_flags & NLM_F_CREATE ? true : false; |
3134 | ||
98319cb9 | 3135 | table = nf_tables_table_lookup(net, nla[NFTA_SET_TABLE], family, |
36596dad | 3136 | genmask); |
20a69341 PM |
3137 | if (IS_ERR(table)) |
3138 | return PTR_ERR(table); | |
3139 | ||
98319cb9 | 3140 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
20a69341 | 3141 | |
37a9cc52 | 3142 | set = nf_tables_set_lookup(table, nla[NFTA_SET_NAME], genmask); |
20a69341 PM |
3143 | if (IS_ERR(set)) { |
3144 | if (PTR_ERR(set) != -ENOENT) | |
3145 | return PTR_ERR(set); | |
1a28ad74 | 3146 | } else { |
20a69341 PM |
3147 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
3148 | return -EEXIST; | |
3149 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
3150 | return -EOPNOTSUPP; | |
3151 | return 0; | |
3152 | } | |
3153 | ||
3154 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) | |
3155 | return -ENOENT; | |
3156 | ||
2b664957 | 3157 | ops = nft_select_set_ops(&ctx, nla, &desc, policy); |
20a69341 PM |
3158 | if (IS_ERR(ops)) |
3159 | return PTR_ERR(ops); | |
3160 | ||
e6d8ecac CFG |
3161 | udlen = 0; |
3162 | if (nla[NFTA_SET_USERDATA]) | |
3163 | udlen = nla_len(nla[NFTA_SET_USERDATA]); | |
3164 | ||
20a69341 PM |
3165 | size = 0; |
3166 | if (ops->privsize != NULL) | |
347b408d | 3167 | size = ops->privsize(nla, &desc); |
20a69341 | 3168 | |
1ff75a3e PNA |
3169 | set = kvzalloc(sizeof(*set) + size + udlen, GFP_KERNEL); |
3170 | if (!set) { | |
3171 | err = -ENOMEM; | |
20a69341 | 3172 | goto err1; |
1ff75a3e | 3173 | } |
20a69341 | 3174 | |
38745490 PS |
3175 | name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL); |
3176 | if (!name) { | |
3177 | err = -ENOMEM; | |
3178 | goto err2; | |
3179 | } | |
3180 | ||
20a69341 | 3181 | err = nf_tables_set_alloc_name(&ctx, set, name); |
38745490 | 3182 | kfree(name); |
20a69341 PM |
3183 | if (err < 0) |
3184 | goto err2; | |
3185 | ||
e6d8ecac CFG |
3186 | udata = NULL; |
3187 | if (udlen) { | |
3188 | udata = set->data + size; | |
3189 | nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen); | |
3190 | } | |
3191 | ||
20a69341 PM |
3192 | INIT_LIST_HEAD(&set->bindings); |
3193 | set->ops = ops; | |
3194 | set->ktype = ktype; | |
c50b960c | 3195 | set->klen = desc.klen; |
20a69341 | 3196 | set->dtype = dtype; |
8aeff920 | 3197 | set->objtype = objtype; |
c50b960c | 3198 | set->dlen = desc.dlen; |
20a69341 | 3199 | set->flags = flags; |
c50b960c | 3200 | set->size = desc.size; |
9363dc4b | 3201 | set->policy = policy; |
e6d8ecac CFG |
3202 | set->udlen = udlen; |
3203 | set->udata = udata; | |
761da293 PM |
3204 | set->timeout = timeout; |
3205 | set->gc_int = gc_int; | |
3ecbfd65 | 3206 | set->handle = nf_tables_alloc_handle(table); |
20a69341 | 3207 | |
c50b960c | 3208 | err = ops->init(set, &desc, nla); |
20a69341 PM |
3209 | if (err < 0) |
3210 | goto err2; | |
3211 | ||
958bee14 | 3212 | err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set); |
20a69341 | 3213 | if (err < 0) |
c17c3cdf | 3214 | goto err3; |
20a69341 | 3215 | |
e688a7f8 | 3216 | list_add_tail_rcu(&set->list, &table->sets); |
4fefee57 | 3217 | table->use++; |
20a69341 PM |
3218 | return 0; |
3219 | ||
c17c3cdf LZ |
3220 | err3: |
3221 | ops->destroy(set); | |
20a69341 | 3222 | err2: |
1ff75a3e | 3223 | kvfree(set); |
20a69341 | 3224 | err1: |
2b664957 | 3225 | module_put(ops->type->owner); |
20a69341 PM |
3226 | return err; |
3227 | } | |
3228 | ||
958bee14 | 3229 | static void nft_set_destroy(struct nft_set *set) |
20a69341 | 3230 | { |
20a69341 | 3231 | set->ops->destroy(set); |
2b664957 | 3232 | module_put(set->ops->type->owner); |
38745490 | 3233 | kfree(set->name); |
1ff75a3e | 3234 | kvfree(set); |
20a69341 PM |
3235 | } |
3236 | ||
958bee14 PNA |
3237 | static void nf_tables_set_destroy(const struct nft_ctx *ctx, struct nft_set *set) |
3238 | { | |
e688a7f8 | 3239 | list_del_rcu(&set->list); |
31f8441c | 3240 | nf_tables_set_notify(ctx, set, NFT_MSG_DELSET, GFP_ATOMIC); |
958bee14 PNA |
3241 | nft_set_destroy(set); |
3242 | } | |
3243 | ||
633c9a84 PNA |
3244 | static int nf_tables_delset(struct net *net, struct sock *nlsk, |
3245 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
3246 | const struct nlattr * const nla[], |
3247 | struct netlink_ext_ack *extack) | |
20a69341 | 3248 | { |
c9c8e485 | 3249 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
f2a6d766 | 3250 | u8 genmask = nft_genmask_next(net); |
20a69341 PM |
3251 | struct nft_set *set; |
3252 | struct nft_ctx ctx; | |
3253 | int err; | |
3254 | ||
ec2c9935 PM |
3255 | if (nfmsg->nfgen_family == NFPROTO_UNSPEC) |
3256 | return -EAFNOSUPPORT; | |
20a69341 PM |
3257 | if (nla[NFTA_SET_TABLE] == NULL) |
3258 | return -EINVAL; | |
3259 | ||
f2a6d766 | 3260 | err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla, genmask); |
20a69341 PM |
3261 | if (err < 0) |
3262 | return err; | |
3263 | ||
3ecbfd65 HS |
3264 | if (nla[NFTA_SET_HANDLE]) |
3265 | set = nf_tables_set_lookup_byhandle(ctx.table, nla[NFTA_SET_HANDLE], genmask); | |
3266 | else | |
3267 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME], genmask); | |
20a69341 PM |
3268 | if (IS_ERR(set)) |
3269 | return PTR_ERR(set); | |
a8278400 PNA |
3270 | |
3271 | if (!list_empty(&set->bindings) || | |
3272 | (nlh->nlmsg_flags & NLM_F_NONREC && atomic_read(&set->nelems) > 0)) | |
20a69341 PM |
3273 | return -EBUSY; |
3274 | ||
ee01d542 | 3275 | return nft_delset(&ctx, set); |
20a69341 PM |
3276 | } |
3277 | ||
3278 | static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx, | |
de70185d | 3279 | struct nft_set *set, |
20a69341 | 3280 | const struct nft_set_iter *iter, |
de70185d | 3281 | struct nft_set_elem *elem) |
20a69341 | 3282 | { |
fe2811eb | 3283 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
20a69341 PM |
3284 | enum nft_registers dreg; |
3285 | ||
3286 | dreg = nft_type_to_reg(set->dtype); | |
1ec10212 PM |
3287 | return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext), |
3288 | set->dtype == NFT_DATA_VERDICT ? | |
3289 | NFT_DATA_VERDICT : NFT_DATA_VALUE, | |
3290 | set->dlen); | |
20a69341 PM |
3291 | } |
3292 | ||
3293 | int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, | |
3294 | struct nft_set_binding *binding) | |
3295 | { | |
3296 | struct nft_set_binding *i; | |
3297 | struct nft_set_iter iter; | |
3298 | ||
408070d6 | 3299 | if (!list_empty(&set->bindings) && nft_set_is_anonymous(set)) |
20a69341 PM |
3300 | return -EBUSY; |
3301 | ||
11113e19 | 3302 | if (binding->flags & NFT_SET_MAP) { |
20a69341 PM |
3303 | /* If the set is already bound to the same chain all |
3304 | * jumps are already validated for that chain. | |
3305 | */ | |
3306 | list_for_each_entry(i, &set->bindings, list) { | |
a4684402 | 3307 | if (i->flags & NFT_SET_MAP && |
11113e19 | 3308 | i->chain == binding->chain) |
20a69341 PM |
3309 | goto bind; |
3310 | } | |
3311 | ||
8588ac09 | 3312 | iter.genmask = nft_genmask_next(ctx->net); |
20a69341 PM |
3313 | iter.skip = 0; |
3314 | iter.count = 0; | |
3315 | iter.err = 0; | |
3316 | iter.fn = nf_tables_bind_check_setelem; | |
3317 | ||
3318 | set->ops->walk(ctx, set, &iter); | |
a02f4248 | 3319 | if (iter.err < 0) |
20a69341 | 3320 | return iter.err; |
20a69341 PM |
3321 | } |
3322 | bind: | |
3323 | binding->chain = ctx->chain; | |
e688a7f8 | 3324 | list_add_tail_rcu(&binding->list, &set->bindings); |
20a69341 PM |
3325 | return 0; |
3326 | } | |
63aea290 | 3327 | EXPORT_SYMBOL_GPL(nf_tables_bind_set); |
20a69341 PM |
3328 | |
3329 | void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, | |
3330 | struct nft_set_binding *binding) | |
3331 | { | |
e688a7f8 | 3332 | list_del_rcu(&binding->list); |
20a69341 | 3333 | |
408070d6 | 3334 | if (list_empty(&set->bindings) && nft_set_is_anonymous(set) && |
37a9cc52 | 3335 | nft_is_active(ctx->net, set)) |
20a69341 PM |
3336 | nf_tables_set_destroy(ctx, set); |
3337 | } | |
63aea290 | 3338 | EXPORT_SYMBOL_GPL(nf_tables_unbind_set); |
20a69341 | 3339 | |
3ac4c07a PM |
3340 | const struct nft_set_ext_type nft_set_ext_types[] = { |
3341 | [NFT_SET_EXT_KEY] = { | |
7d740264 | 3342 | .align = __alignof__(u32), |
3ac4c07a PM |
3343 | }, |
3344 | [NFT_SET_EXT_DATA] = { | |
7d740264 | 3345 | .align = __alignof__(u32), |
3ac4c07a | 3346 | }, |
f25ad2e9 PM |
3347 | [NFT_SET_EXT_EXPR] = { |
3348 | .align = __alignof__(struct nft_expr), | |
3349 | }, | |
8aeff920 PNA |
3350 | [NFT_SET_EXT_OBJREF] = { |
3351 | .len = sizeof(struct nft_object *), | |
3352 | .align = __alignof__(struct nft_object *), | |
3353 | }, | |
3ac4c07a PM |
3354 | [NFT_SET_EXT_FLAGS] = { |
3355 | .len = sizeof(u8), | |
3356 | .align = __alignof__(u8), | |
3357 | }, | |
c3e1b005 PM |
3358 | [NFT_SET_EXT_TIMEOUT] = { |
3359 | .len = sizeof(u64), | |
3360 | .align = __alignof__(u64), | |
3361 | }, | |
3362 | [NFT_SET_EXT_EXPIRATION] = { | |
3363 | .len = sizeof(unsigned long), | |
3364 | .align = __alignof__(unsigned long), | |
3365 | }, | |
68e942e8 PM |
3366 | [NFT_SET_EXT_USERDATA] = { |
3367 | .len = sizeof(struct nft_userdata), | |
3368 | .align = __alignof__(struct nft_userdata), | |
3369 | }, | |
3ac4c07a PM |
3370 | }; |
3371 | EXPORT_SYMBOL_GPL(nft_set_ext_types); | |
3372 | ||
20a69341 PM |
3373 | /* |
3374 | * Set elements | |
3375 | */ | |
3376 | ||
3377 | static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = { | |
3378 | [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED }, | |
3379 | [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED }, | |
3380 | [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 }, | |
c3e1b005 | 3381 | [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 }, |
68e942e8 PM |
3382 | [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY, |
3383 | .len = NFT_USERDATA_MAXLEN }, | |
467697d2 FW |
3384 | [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED }, |
3385 | [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING }, | |
20a69341 PM |
3386 | }; |
3387 | ||
3388 | static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = { | |
b2fbd044 LZ |
3389 | [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING, |
3390 | .len = NFT_TABLE_MAXNAMELEN - 1 }, | |
3391 | [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING, | |
3392 | .len = NFT_SET_MAXNAMELEN - 1 }, | |
20a69341 | 3393 | [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED }, |
958bee14 | 3394 | [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 }, |
20a69341 PM |
3395 | }; |
3396 | ||
633c9a84 | 3397 | static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx, struct net *net, |
20a69341 PM |
3398 | const struct sk_buff *skb, |
3399 | const struct nlmsghdr *nlh, | |
f2a6d766 PNA |
3400 | const struct nlattr * const nla[], |
3401 | u8 genmask) | |
20a69341 PM |
3402 | { |
3403 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
98319cb9 | 3404 | int family = nfmsg->nfgen_family; |
7c95f6d8 | 3405 | struct nft_table *table; |
20a69341 | 3406 | |
36596dad | 3407 | table = nf_tables_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], |
98319cb9 | 3408 | family, genmask); |
20a69341 PM |
3409 | if (IS_ERR(table)) |
3410 | return PTR_ERR(table); | |
3411 | ||
98319cb9 | 3412 | nft_ctx_init(ctx, net, skb, nlh, family, table, NULL, nla); |
20a69341 PM |
3413 | return 0; |
3414 | } | |
3415 | ||
3416 | static int nf_tables_fill_setelem(struct sk_buff *skb, | |
3417 | const struct nft_set *set, | |
3418 | const struct nft_set_elem *elem) | |
3419 | { | |
fe2811eb | 3420 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
20a69341 PM |
3421 | unsigned char *b = skb_tail_pointer(skb); |
3422 | struct nlattr *nest; | |
3423 | ||
3424 | nest = nla_nest_start(skb, NFTA_LIST_ELEM); | |
3425 | if (nest == NULL) | |
3426 | goto nla_put_failure; | |
3427 | ||
fe2811eb PM |
3428 | if (nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext), |
3429 | NFT_DATA_VALUE, set->klen) < 0) | |
20a69341 PM |
3430 | goto nla_put_failure; |
3431 | ||
fe2811eb PM |
3432 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) && |
3433 | nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext), | |
20a69341 PM |
3434 | set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE, |
3435 | set->dlen) < 0) | |
3436 | goto nla_put_failure; | |
3437 | ||
f25ad2e9 PM |
3438 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR) && |
3439 | nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, nft_set_ext_expr(ext)) < 0) | |
3440 | goto nla_put_failure; | |
3441 | ||
8aeff920 PNA |
3442 | if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) && |
3443 | nla_put_string(skb, NFTA_SET_ELEM_OBJREF, | |
3444 | (*nft_set_ext_obj(ext))->name) < 0) | |
3445 | goto nla_put_failure; | |
3446 | ||
fe2811eb PM |
3447 | if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) && |
3448 | nla_put_be32(skb, NFTA_SET_ELEM_FLAGS, | |
3449 | htonl(*nft_set_ext_flags(ext)))) | |
3450 | goto nla_put_failure; | |
20a69341 | 3451 | |
c3e1b005 PM |
3452 | if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) && |
3453 | nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT, | |
d3e2a111 AP |
3454 | cpu_to_be64(jiffies_to_msecs( |
3455 | *nft_set_ext_timeout(ext))), | |
b46f6ded | 3456 | NFTA_SET_ELEM_PAD)) |
c3e1b005 PM |
3457 | goto nla_put_failure; |
3458 | ||
3459 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) { | |
3460 | unsigned long expires, now = jiffies; | |
3461 | ||
3462 | expires = *nft_set_ext_expiration(ext); | |
3463 | if (time_before(now, expires)) | |
3464 | expires -= now; | |
3465 | else | |
3466 | expires = 0; | |
3467 | ||
3468 | if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION, | |
b46f6ded ND |
3469 | cpu_to_be64(jiffies_to_msecs(expires)), |
3470 | NFTA_SET_ELEM_PAD)) | |
c3e1b005 PM |
3471 | goto nla_put_failure; |
3472 | } | |
3473 | ||
68e942e8 PM |
3474 | if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) { |
3475 | struct nft_userdata *udata; | |
3476 | ||
3477 | udata = nft_set_ext_userdata(ext); | |
3478 | if (nla_put(skb, NFTA_SET_ELEM_USERDATA, | |
3479 | udata->len + 1, udata->data)) | |
3480 | goto nla_put_failure; | |
3481 | } | |
3482 | ||
20a69341 PM |
3483 | nla_nest_end(skb, nest); |
3484 | return 0; | |
3485 | ||
3486 | nla_put_failure: | |
3487 | nlmsg_trim(skb, b); | |
3488 | return -EMSGSIZE; | |
3489 | } | |
3490 | ||
3491 | struct nft_set_dump_args { | |
3492 | const struct netlink_callback *cb; | |
3493 | struct nft_set_iter iter; | |
3494 | struct sk_buff *skb; | |
3495 | }; | |
3496 | ||
3497 | static int nf_tables_dump_setelem(const struct nft_ctx *ctx, | |
de70185d | 3498 | struct nft_set *set, |
20a69341 | 3499 | const struct nft_set_iter *iter, |
de70185d | 3500 | struct nft_set_elem *elem) |
20a69341 PM |
3501 | { |
3502 | struct nft_set_dump_args *args; | |
3503 | ||
3504 | args = container_of(iter, struct nft_set_dump_args, iter); | |
3505 | return nf_tables_fill_setelem(args->skb, set, elem); | |
3506 | } | |
3507 | ||
fa803605 LZ |
3508 | struct nft_set_dump_ctx { |
3509 | const struct nft_set *set; | |
3510 | struct nft_ctx ctx; | |
3511 | }; | |
3512 | ||
20a69341 PM |
3513 | static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb) |
3514 | { | |
fa803605 | 3515 | struct nft_set_dump_ctx *dump_ctx = cb->data; |
633c9a84 | 3516 | struct net *net = sock_net(skb->sk); |
fa803605 | 3517 | struct nft_table *table; |
de70185d | 3518 | struct nft_set *set; |
20a69341 | 3519 | struct nft_set_dump_args args; |
fa803605 | 3520 | bool set_found = false; |
20a69341 PM |
3521 | struct nfgenmsg *nfmsg; |
3522 | struct nlmsghdr *nlh; | |
3523 | struct nlattr *nest; | |
3524 | u32 portid, seq; | |
fa803605 | 3525 | int event; |
20a69341 | 3526 | |
fa803605 | 3527 | rcu_read_lock(); |
36596dad PNA |
3528 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
3529 | if (dump_ctx->ctx.family != NFPROTO_UNSPEC && | |
98319cb9 | 3530 | dump_ctx->ctx.family != table->family) |
fa803605 | 3531 | continue; |
20a69341 | 3532 | |
36596dad PNA |
3533 | if (table != dump_ctx->ctx.table) |
3534 | continue; | |
20a69341 | 3535 | |
36596dad PNA |
3536 | list_for_each_entry_rcu(set, &table->sets, list) { |
3537 | if (set == dump_ctx->set) { | |
3538 | set_found = true; | |
3539 | break; | |
fa803605 | 3540 | } |
fa803605 LZ |
3541 | } |
3542 | break; | |
3543 | } | |
3544 | ||
3545 | if (!set_found) { | |
3546 | rcu_read_unlock(); | |
3547 | return -ENOENT; | |
3548 | } | |
20a69341 | 3549 | |
dedb67c4 | 3550 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM); |
20a69341 PM |
3551 | portid = NETLINK_CB(cb->skb).portid; |
3552 | seq = cb->nlh->nlmsg_seq; | |
3553 | ||
3554 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), | |
3555 | NLM_F_MULTI); | |
3556 | if (nlh == NULL) | |
3557 | goto nla_put_failure; | |
3558 | ||
3559 | nfmsg = nlmsg_data(nlh); | |
98319cb9 | 3560 | nfmsg->nfgen_family = table->family; |
20a69341 | 3561 | nfmsg->version = NFNETLINK_V0; |
fa803605 | 3562 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); |
20a69341 | 3563 | |
fa803605 | 3564 | if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name)) |
20a69341 PM |
3565 | goto nla_put_failure; |
3566 | if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name)) | |
3567 | goto nla_put_failure; | |
3568 | ||
3569 | nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS); | |
3570 | if (nest == NULL) | |
3571 | goto nla_put_failure; | |
3572 | ||
8588ac09 PNA |
3573 | args.cb = cb; |
3574 | args.skb = skb; | |
fa803605 | 3575 | args.iter.genmask = nft_genmask_cur(net); |
8588ac09 PNA |
3576 | args.iter.skip = cb->args[0]; |
3577 | args.iter.count = 0; | |
3578 | args.iter.err = 0; | |
3579 | args.iter.fn = nf_tables_dump_setelem; | |
fa803605 LZ |
3580 | set->ops->walk(&dump_ctx->ctx, set, &args.iter); |
3581 | rcu_read_unlock(); | |
20a69341 PM |
3582 | |
3583 | nla_nest_end(skb, nest); | |
3584 | nlmsg_end(skb, nlh); | |
3585 | ||
3586 | if (args.iter.err && args.iter.err != -EMSGSIZE) | |
3587 | return args.iter.err; | |
3588 | if (args.iter.count == cb->args[0]) | |
3589 | return 0; | |
3590 | ||
3591 | cb->args[0] = args.iter.count; | |
3592 | return skb->len; | |
3593 | ||
3594 | nla_put_failure: | |
fa803605 | 3595 | rcu_read_unlock(); |
20a69341 PM |
3596 | return -ENOSPC; |
3597 | } | |
3598 | ||
fa803605 LZ |
3599 | static int nf_tables_dump_set_done(struct netlink_callback *cb) |
3600 | { | |
3601 | kfree(cb->data); | |
3602 | return 0; | |
3603 | } | |
3604 | ||
d60ce62f AB |
3605 | static int nf_tables_fill_setelem_info(struct sk_buff *skb, |
3606 | const struct nft_ctx *ctx, u32 seq, | |
3607 | u32 portid, int event, u16 flags, | |
3608 | const struct nft_set *set, | |
3609 | const struct nft_set_elem *elem) | |
3610 | { | |
3611 | struct nfgenmsg *nfmsg; | |
3612 | struct nlmsghdr *nlh; | |
3613 | struct nlattr *nest; | |
3614 | int err; | |
3615 | ||
dedb67c4 | 3616 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); |
d60ce62f AB |
3617 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), |
3618 | flags); | |
3619 | if (nlh == NULL) | |
3620 | goto nla_put_failure; | |
3621 | ||
3622 | nfmsg = nlmsg_data(nlh); | |
36596dad | 3623 | nfmsg->nfgen_family = ctx->family; |
d60ce62f | 3624 | nfmsg->version = NFNETLINK_V0; |
84d7fce6 | 3625 | nfmsg->res_id = htons(ctx->net->nft.base_seq & 0xffff); |
d60ce62f AB |
3626 | |
3627 | if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name)) | |
3628 | goto nla_put_failure; | |
3629 | if (nla_put_string(skb, NFTA_SET_NAME, set->name)) | |
3630 | goto nla_put_failure; | |
3631 | ||
3632 | nest = nla_nest_start(skb, NFTA_SET_ELEM_LIST_ELEMENTS); | |
3633 | if (nest == NULL) | |
3634 | goto nla_put_failure; | |
3635 | ||
3636 | err = nf_tables_fill_setelem(skb, set, elem); | |
3637 | if (err < 0) | |
3638 | goto nla_put_failure; | |
3639 | ||
3640 | nla_nest_end(skb, nest); | |
3641 | ||
053c095a JB |
3642 | nlmsg_end(skb, nlh); |
3643 | return 0; | |
d60ce62f AB |
3644 | |
3645 | nla_put_failure: | |
3646 | nlmsg_trim(skb, nlh); | |
3647 | return -1; | |
3648 | } | |
3649 | ||
ba0e4d99 PNA |
3650 | static int nft_setelem_parse_flags(const struct nft_set *set, |
3651 | const struct nlattr *attr, u32 *flags) | |
3652 | { | |
3653 | if (attr == NULL) | |
3654 | return 0; | |
3655 | ||
3656 | *flags = ntohl(nla_get_be32(attr)); | |
3657 | if (*flags & ~NFT_SET_ELEM_INTERVAL_END) | |
3658 | return -EINVAL; | |
3659 | if (!(set->flags & NFT_SET_INTERVAL) && | |
3660 | *flags & NFT_SET_ELEM_INTERVAL_END) | |
3661 | return -EINVAL; | |
3662 | ||
3663 | return 0; | |
3664 | } | |
3665 | ||
3666 | static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set, | |
3667 | const struct nlattr *attr) | |
3668 | { | |
3669 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; | |
3670 | const struct nft_set_ext *ext; | |
3671 | struct nft_data_desc desc; | |
3672 | struct nft_set_elem elem; | |
3673 | struct sk_buff *skb; | |
3674 | uint32_t flags = 0; | |
3675 | void *priv; | |
3676 | int err; | |
3677 | ||
3678 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, | |
3679 | nft_set_elem_policy, NULL); | |
3680 | if (err < 0) | |
3681 | return err; | |
3682 | ||
3683 | if (!nla[NFTA_SET_ELEM_KEY]) | |
3684 | return -EINVAL; | |
3685 | ||
3686 | err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags); | |
3687 | if (err < 0) | |
3688 | return err; | |
3689 | ||
3690 | err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &desc, | |
3691 | nla[NFTA_SET_ELEM_KEY]); | |
3692 | if (err < 0) | |
3693 | return err; | |
3694 | ||
3695 | err = -EINVAL; | |
3696 | if (desc.type != NFT_DATA_VALUE || desc.len != set->klen) | |
3697 | return err; | |
3698 | ||
3699 | priv = set->ops->get(ctx->net, set, &elem, flags); | |
3700 | if (IS_ERR(priv)) | |
3701 | return PTR_ERR(priv); | |
3702 | ||
3703 | elem.priv = priv; | |
3704 | ext = nft_set_elem_ext(set, &elem); | |
3705 | ||
3706 | err = -ENOMEM; | |
3707 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
3708 | if (skb == NULL) | |
3709 | goto err1; | |
3710 | ||
3711 | err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid, | |
3712 | NFT_MSG_NEWSETELEM, 0, set, &elem); | |
3713 | if (err < 0) | |
3714 | goto err2; | |
3715 | ||
3716 | err = nfnetlink_unicast(skb, ctx->net, ctx->portid, MSG_DONTWAIT); | |
3717 | /* This avoids a loop in nfnetlink. */ | |
3718 | if (err < 0) | |
3719 | goto err1; | |
3720 | ||
3721 | return 0; | |
3722 | err2: | |
3723 | kfree_skb(skb); | |
3724 | err1: | |
3725 | /* this avoids a loop in nfnetlink. */ | |
3726 | return err == -EAGAIN ? -ENOBUFS : err; | |
3727 | } | |
3728 | ||
3729 | static int nf_tables_getsetelem(struct net *net, struct sock *nlsk, | |
3730 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
3731 | const struct nlattr * const nla[], | |
3732 | struct netlink_ext_ack *extack) | |
3733 | { | |
3734 | u8 genmask = nft_genmask_cur(net); | |
3735 | struct nft_set *set; | |
3736 | struct nlattr *attr; | |
3737 | struct nft_ctx ctx; | |
3738 | int rem, err = 0; | |
3739 | ||
3740 | err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask); | |
3741 | if (err < 0) | |
3742 | return err; | |
3743 | ||
3744 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET], | |
3745 | genmask); | |
3746 | if (IS_ERR(set)) | |
3747 | return PTR_ERR(set); | |
3748 | ||
3749 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
3750 | struct netlink_dump_control c = { | |
3751 | .dump = nf_tables_dump_set, | |
3752 | .done = nf_tables_dump_set_done, | |
3753 | }; | |
3754 | struct nft_set_dump_ctx *dump_ctx; | |
3755 | ||
3756 | dump_ctx = kmalloc(sizeof(*dump_ctx), GFP_KERNEL); | |
3757 | if (!dump_ctx) | |
3758 | return -ENOMEM; | |
3759 | ||
3760 | dump_ctx->set = set; | |
3761 | dump_ctx->ctx = ctx; | |
3762 | ||
3763 | c.data = dump_ctx; | |
3764 | return netlink_dump_start(nlsk, skb, nlh, &c); | |
3765 | } | |
3766 | ||
3767 | if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS]) | |
3768 | return -EINVAL; | |
3769 | ||
3770 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { | |
3771 | err = nft_get_set_elem(&ctx, set, attr); | |
3772 | if (err < 0) | |
3773 | break; | |
3774 | } | |
3775 | ||
3776 | return err; | |
3777 | } | |
3778 | ||
25e94a99 PNA |
3779 | static void nf_tables_setelem_notify(const struct nft_ctx *ctx, |
3780 | const struct nft_set *set, | |
3781 | const struct nft_set_elem *elem, | |
3782 | int event, u16 flags) | |
d60ce62f | 3783 | { |
128ad332 PNA |
3784 | struct net *net = ctx->net; |
3785 | u32 portid = ctx->portid; | |
d60ce62f AB |
3786 | struct sk_buff *skb; |
3787 | int err; | |
3788 | ||
128ad332 | 3789 | if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) |
25e94a99 | 3790 | return; |
d60ce62f | 3791 | |
d60ce62f AB |
3792 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
3793 | if (skb == NULL) | |
3794 | goto err; | |
3795 | ||
3796 | err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags, | |
3797 | set, elem); | |
3798 | if (err < 0) { | |
3799 | kfree_skb(skb); | |
3800 | goto err; | |
3801 | } | |
3802 | ||
25e94a99 PNA |
3803 | nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, ctx->report, |
3804 | GFP_KERNEL); | |
3805 | return; | |
d60ce62f | 3806 | err: |
25e94a99 | 3807 | nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS); |
d60ce62f AB |
3808 | } |
3809 | ||
60319eb1 PNA |
3810 | static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx, |
3811 | int msg_type, | |
3812 | struct nft_set *set) | |
3813 | { | |
3814 | struct nft_trans *trans; | |
3815 | ||
3816 | trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem)); | |
3817 | if (trans == NULL) | |
3818 | return NULL; | |
3819 | ||
3820 | nft_trans_elem_set(trans) = set; | |
3821 | return trans; | |
3822 | } | |
3823 | ||
22fe54d5 PM |
3824 | void *nft_set_elem_init(const struct nft_set *set, |
3825 | const struct nft_set_ext_tmpl *tmpl, | |
49499c3e | 3826 | const u32 *key, const u32 *data, |
22fe54d5 | 3827 | u64 timeout, gfp_t gfp) |
fe2811eb PM |
3828 | { |
3829 | struct nft_set_ext *ext; | |
3830 | void *elem; | |
3831 | ||
3832 | elem = kzalloc(set->ops->elemsize + tmpl->len, gfp); | |
3833 | if (elem == NULL) | |
3834 | return NULL; | |
3835 | ||
3836 | ext = nft_set_elem_ext(set, elem); | |
3837 | nft_set_ext_init(ext, tmpl); | |
3838 | ||
3839 | memcpy(nft_set_ext_key(ext), key, set->klen); | |
3840 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) | |
3841 | memcpy(nft_set_ext_data(ext), data, set->dlen); | |
c3e1b005 PM |
3842 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) |
3843 | *nft_set_ext_expiration(ext) = | |
d3e2a111 | 3844 | jiffies + timeout; |
c3e1b005 PM |
3845 | if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT)) |
3846 | *nft_set_ext_timeout(ext) = timeout; | |
fe2811eb PM |
3847 | |
3848 | return elem; | |
3849 | } | |
3850 | ||
61f9e292 LZ |
3851 | void nft_set_elem_destroy(const struct nft_set *set, void *elem, |
3852 | bool destroy_expr) | |
61edafbb PM |
3853 | { |
3854 | struct nft_set_ext *ext = nft_set_elem_ext(set, elem); | |
3855 | ||
59105446 | 3856 | nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE); |
61edafbb | 3857 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) |
59105446 | 3858 | nft_data_release(nft_set_ext_data(ext), set->dtype); |
61f9e292 | 3859 | if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) |
f25ad2e9 | 3860 | nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext)); |
8aeff920 PNA |
3861 | if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF)) |
3862 | (*nft_set_ext_obj(ext))->use--; | |
61edafbb PM |
3863 | kfree(elem); |
3864 | } | |
3865 | EXPORT_SYMBOL_GPL(nft_set_elem_destroy); | |
3866 | ||
59105446 PNA |
3867 | /* Only called from commit path, nft_set_elem_deactivate() already deals with |
3868 | * the refcounting from the preparation phase. | |
3869 | */ | |
3870 | static void nf_tables_set_elem_destroy(const struct nft_set *set, void *elem) | |
3871 | { | |
3872 | struct nft_set_ext *ext = nft_set_elem_ext(set, elem); | |
3873 | ||
3874 | if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPR)) | |
3875 | nf_tables_expr_destroy(NULL, nft_set_ext_expr(ext)); | |
3876 | kfree(elem); | |
3877 | } | |
3878 | ||
60319eb1 | 3879 | static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, |
c016c7e4 | 3880 | const struct nlattr *attr, u32 nlmsg_flags) |
20a69341 PM |
3881 | { |
3882 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; | |
8aeff920 | 3883 | u8 genmask = nft_genmask_next(ctx->net); |
20a69341 | 3884 | struct nft_data_desc d1, d2; |
fe2811eb | 3885 | struct nft_set_ext_tmpl tmpl; |
c016c7e4 | 3886 | struct nft_set_ext *ext, *ext2; |
20a69341 PM |
3887 | struct nft_set_elem elem; |
3888 | struct nft_set_binding *binding; | |
8aeff920 | 3889 | struct nft_object *obj = NULL; |
68e942e8 | 3890 | struct nft_userdata *udata; |
fe2811eb | 3891 | struct nft_data data; |
20a69341 | 3892 | enum nft_registers dreg; |
60319eb1 | 3893 | struct nft_trans *trans; |
0e9091d6 | 3894 | u32 flags = 0; |
c3e1b005 | 3895 | u64 timeout; |
68e942e8 | 3896 | u8 ulen; |
20a69341 PM |
3897 | int err; |
3898 | ||
3899 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, | |
fceb6435 | 3900 | nft_set_elem_policy, NULL); |
20a69341 PM |
3901 | if (err < 0) |
3902 | return err; | |
3903 | ||
3904 | if (nla[NFTA_SET_ELEM_KEY] == NULL) | |
3905 | return -EINVAL; | |
3906 | ||
fe2811eb PM |
3907 | nft_set_ext_prepare(&tmpl); |
3908 | ||
0e9091d6 PNA |
3909 | err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags); |
3910 | if (err < 0) | |
3911 | return err; | |
3912 | if (flags != 0) | |
3913 | nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS); | |
20a69341 PM |
3914 | |
3915 | if (set->flags & NFT_SET_MAP) { | |
3916 | if (nla[NFTA_SET_ELEM_DATA] == NULL && | |
fe2811eb | 3917 | !(flags & NFT_SET_ELEM_INTERVAL_END)) |
20a69341 | 3918 | return -EINVAL; |
bd7fc645 | 3919 | if (nla[NFTA_SET_ELEM_DATA] != NULL && |
fe2811eb | 3920 | flags & NFT_SET_ELEM_INTERVAL_END) |
bd7fc645 | 3921 | return -EINVAL; |
20a69341 PM |
3922 | } else { |
3923 | if (nla[NFTA_SET_ELEM_DATA] != NULL) | |
3924 | return -EINVAL; | |
3925 | } | |
3926 | ||
c3e1b005 PM |
3927 | timeout = 0; |
3928 | if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) { | |
3929 | if (!(set->flags & NFT_SET_TIMEOUT)) | |
3930 | return -EINVAL; | |
d3e2a111 AP |
3931 | timeout = msecs_to_jiffies(be64_to_cpu(nla_get_be64( |
3932 | nla[NFTA_SET_ELEM_TIMEOUT]))); | |
c3e1b005 PM |
3933 | } else if (set->flags & NFT_SET_TIMEOUT) { |
3934 | timeout = set->timeout; | |
3935 | } | |
3936 | ||
7d740264 | 3937 | err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &d1, |
d0a11fc3 | 3938 | nla[NFTA_SET_ELEM_KEY]); |
20a69341 PM |
3939 | if (err < 0) |
3940 | goto err1; | |
3941 | err = -EINVAL; | |
3942 | if (d1.type != NFT_DATA_VALUE || d1.len != set->klen) | |
3943 | goto err2; | |
3944 | ||
7d740264 | 3945 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, d1.len); |
c3e1b005 PM |
3946 | if (timeout > 0) { |
3947 | nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION); | |
3948 | if (timeout != set->timeout) | |
3949 | nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT); | |
3950 | } | |
fe2811eb | 3951 | |
8aeff920 PNA |
3952 | if (nla[NFTA_SET_ELEM_OBJREF] != NULL) { |
3953 | if (!(set->flags & NFT_SET_OBJECT)) { | |
3954 | err = -EINVAL; | |
3955 | goto err2; | |
3956 | } | |
3957 | obj = nf_tables_obj_lookup(ctx->table, nla[NFTA_SET_ELEM_OBJREF], | |
3958 | set->objtype, genmask); | |
3959 | if (IS_ERR(obj)) { | |
3960 | err = PTR_ERR(obj); | |
3961 | goto err2; | |
3962 | } | |
3963 | nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF); | |
3964 | } | |
3965 | ||
20a69341 | 3966 | if (nla[NFTA_SET_ELEM_DATA] != NULL) { |
d0a11fc3 PM |
3967 | err = nft_data_init(ctx, &data, sizeof(data), &d2, |
3968 | nla[NFTA_SET_ELEM_DATA]); | |
20a69341 PM |
3969 | if (err < 0) |
3970 | goto err2; | |
3971 | ||
3972 | err = -EINVAL; | |
3973 | if (set->dtype != NFT_DATA_VERDICT && d2.len != set->dlen) | |
3974 | goto err3; | |
3975 | ||
3976 | dreg = nft_type_to_reg(set->dtype); | |
3977 | list_for_each_entry(binding, &set->bindings, list) { | |
3978 | struct nft_ctx bind_ctx = { | |
58c78e10 | 3979 | .net = ctx->net, |
36596dad | 3980 | .family = ctx->family, |
20a69341 | 3981 | .table = ctx->table, |
7c95f6d8 | 3982 | .chain = (struct nft_chain *)binding->chain, |
20a69341 PM |
3983 | }; |
3984 | ||
11113e19 PM |
3985 | if (!(binding->flags & NFT_SET_MAP)) |
3986 | continue; | |
3987 | ||
1ec10212 PM |
3988 | err = nft_validate_register_store(&bind_ctx, dreg, |
3989 | &data, | |
3990 | d2.type, d2.len); | |
20a69341 PM |
3991 | if (err < 0) |
3992 | goto err3; | |
3993 | } | |
fe2811eb | 3994 | |
7d740264 | 3995 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, d2.len); |
20a69341 PM |
3996 | } |
3997 | ||
68e942e8 PM |
3998 | /* The full maximum length of userdata can exceed the maximum |
3999 | * offset value (U8_MAX) for following extensions, therefor it | |
4000 | * must be the last extension added. | |
4001 | */ | |
4002 | ulen = 0; | |
4003 | if (nla[NFTA_SET_ELEM_USERDATA] != NULL) { | |
4004 | ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]); | |
4005 | if (ulen > 0) | |
4006 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA, | |
4007 | ulen); | |
4008 | } | |
4009 | ||
fe2811eb | 4010 | err = -ENOMEM; |
7d740264 | 4011 | elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, data.data, |
c3e1b005 | 4012 | timeout, GFP_KERNEL); |
fe2811eb PM |
4013 | if (elem.priv == NULL) |
4014 | goto err3; | |
4015 | ||
4016 | ext = nft_set_elem_ext(set, elem.priv); | |
4017 | if (flags) | |
4018 | *nft_set_ext_flags(ext) = flags; | |
68e942e8 PM |
4019 | if (ulen > 0) { |
4020 | udata = nft_set_ext_userdata(ext); | |
4021 | udata->len = ulen - 1; | |
4022 | nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen); | |
4023 | } | |
8aeff920 PNA |
4024 | if (obj) { |
4025 | *nft_set_ext_obj(ext) = obj; | |
4026 | obj->use++; | |
4027 | } | |
fe2811eb | 4028 | |
60319eb1 PNA |
4029 | trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set); |
4030 | if (trans == NULL) | |
fe2811eb | 4031 | goto err4; |
60319eb1 | 4032 | |
69086658 | 4033 | ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK; |
c016c7e4 PNA |
4034 | err = set->ops->insert(ctx->net, set, &elem, &ext2); |
4035 | if (err) { | |
4036 | if (err == -EEXIST) { | |
9744a6fc PNA |
4037 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^ |
4038 | nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) || | |
4039 | nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^ | |
4040 | nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF)) | |
4041 | return -EBUSY; | |
8aeff920 PNA |
4042 | if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) && |
4043 | nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) && | |
4044 | memcmp(nft_set_ext_data(ext), | |
4045 | nft_set_ext_data(ext2), set->dlen) != 0) || | |
4046 | (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) && | |
4047 | nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) && | |
4048 | *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2))) | |
c016c7e4 PNA |
4049 | err = -EBUSY; |
4050 | else if (!(nlmsg_flags & NLM_F_EXCL)) | |
4051 | err = 0; | |
4052 | } | |
fe2811eb | 4053 | goto err5; |
c016c7e4 | 4054 | } |
20a69341 | 4055 | |
35d0ac90 PNA |
4056 | if (set->size && |
4057 | !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) { | |
4058 | err = -ENFILE; | |
4059 | goto err6; | |
4060 | } | |
4061 | ||
60319eb1 | 4062 | nft_trans_elem(trans) = elem; |
46bbafce | 4063 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
20a69341 PM |
4064 | return 0; |
4065 | ||
35d0ac90 | 4066 | err6: |
5cb82a38 | 4067 | set->ops->remove(ctx->net, set, &elem); |
fe2811eb | 4068 | err5: |
60319eb1 | 4069 | kfree(trans); |
fe2811eb PM |
4070 | err4: |
4071 | kfree(elem.priv); | |
20a69341 PM |
4072 | err3: |
4073 | if (nla[NFTA_SET_ELEM_DATA] != NULL) | |
59105446 | 4074 | nft_data_release(&data, d2.type); |
20a69341 | 4075 | err2: |
59105446 | 4076 | nft_data_release(&elem.key.val, d1.type); |
20a69341 PM |
4077 | err1: |
4078 | return err; | |
4079 | } | |
4080 | ||
633c9a84 PNA |
4081 | static int nf_tables_newsetelem(struct net *net, struct sock *nlsk, |
4082 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
4083 | const struct nlattr * const nla[], |
4084 | struct netlink_ext_ack *extack) | |
20a69341 | 4085 | { |
f2a6d766 | 4086 | u8 genmask = nft_genmask_next(net); |
20a69341 PM |
4087 | const struct nlattr *attr; |
4088 | struct nft_set *set; | |
4089 | struct nft_ctx ctx; | |
60319eb1 | 4090 | int rem, err = 0; |
20a69341 | 4091 | |
7d5570ca PNA |
4092 | if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) |
4093 | return -EINVAL; | |
4094 | ||
f2a6d766 | 4095 | err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask); |
20a69341 PM |
4096 | if (err < 0) |
4097 | return err; | |
4098 | ||
a3073c17 PNA |
4099 | set = nft_set_lookup_global(net, ctx.table, nla[NFTA_SET_ELEM_LIST_SET], |
4100 | nla[NFTA_SET_ELEM_LIST_SET_ID], genmask); | |
4101 | if (IS_ERR(set)) | |
4102 | return PTR_ERR(set); | |
958bee14 | 4103 | |
20a69341 PM |
4104 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) |
4105 | return -EBUSY; | |
4106 | ||
4107 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { | |
c016c7e4 | 4108 | err = nft_add_set_elem(&ctx, set, attr, nlh->nlmsg_flags); |
35d0ac90 | 4109 | if (err < 0) |
60319eb1 | 4110 | break; |
20a69341 | 4111 | } |
60319eb1 | 4112 | return err; |
20a69341 PM |
4113 | } |
4114 | ||
59105446 PNA |
4115 | /** |
4116 | * nft_data_hold - hold a nft_data item | |
4117 | * | |
4118 | * @data: struct nft_data to release | |
4119 | * @type: type of data | |
4120 | * | |
4121 | * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded, | |
4122 | * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and | |
4123 | * NFT_GOTO verdicts. This function must be called on active data objects | |
4124 | * from the second phase of the commit protocol. | |
4125 | */ | |
4126 | static void nft_data_hold(const struct nft_data *data, enum nft_data_types type) | |
4127 | { | |
4128 | if (type == NFT_DATA_VERDICT) { | |
4129 | switch (data->verdict.code) { | |
4130 | case NFT_JUMP: | |
4131 | case NFT_GOTO: | |
4132 | data->verdict.chain->use++; | |
4133 | break; | |
4134 | } | |
4135 | } | |
4136 | } | |
4137 | ||
4138 | static void nft_set_elem_activate(const struct net *net, | |
4139 | const struct nft_set *set, | |
4140 | struct nft_set_elem *elem) | |
4141 | { | |
4142 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); | |
4143 | ||
4144 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) | |
4145 | nft_data_hold(nft_set_ext_data(ext), set->dtype); | |
4146 | if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF)) | |
4147 | (*nft_set_ext_obj(ext))->use++; | |
4148 | } | |
4149 | ||
4150 | static void nft_set_elem_deactivate(const struct net *net, | |
4151 | const struct nft_set *set, | |
4152 | struct nft_set_elem *elem) | |
4153 | { | |
4154 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); | |
4155 | ||
4156 | if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA)) | |
4157 | nft_data_release(nft_set_ext_data(ext), set->dtype); | |
4158 | if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF)) | |
4159 | (*nft_set_ext_obj(ext))->use--; | |
4160 | } | |
4161 | ||
60319eb1 | 4162 | static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set, |
20a69341 PM |
4163 | const struct nlattr *attr) |
4164 | { | |
4165 | struct nlattr *nla[NFTA_SET_ELEM_MAX + 1]; | |
3971ca14 | 4166 | struct nft_set_ext_tmpl tmpl; |
20a69341 PM |
4167 | struct nft_data_desc desc; |
4168 | struct nft_set_elem elem; | |
3971ca14 | 4169 | struct nft_set_ext *ext; |
60319eb1 | 4170 | struct nft_trans *trans; |
3971ca14 PNA |
4171 | u32 flags = 0; |
4172 | void *priv; | |
20a69341 PM |
4173 | int err; |
4174 | ||
4175 | err = nla_parse_nested(nla, NFTA_SET_ELEM_MAX, attr, | |
fceb6435 | 4176 | nft_set_elem_policy, NULL); |
20a69341 PM |
4177 | if (err < 0) |
4178 | goto err1; | |
4179 | ||
4180 | err = -EINVAL; | |
4181 | if (nla[NFTA_SET_ELEM_KEY] == NULL) | |
4182 | goto err1; | |
4183 | ||
3971ca14 PNA |
4184 | nft_set_ext_prepare(&tmpl); |
4185 | ||
4186 | err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags); | |
4187 | if (err < 0) | |
4188 | return err; | |
4189 | if (flags != 0) | |
4190 | nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS); | |
4191 | ||
7d740264 | 4192 | err = nft_data_init(ctx, &elem.key.val, sizeof(elem.key), &desc, |
d0a11fc3 | 4193 | nla[NFTA_SET_ELEM_KEY]); |
20a69341 PM |
4194 | if (err < 0) |
4195 | goto err1; | |
4196 | ||
4197 | err = -EINVAL; | |
4198 | if (desc.type != NFT_DATA_VALUE || desc.len != set->klen) | |
4199 | goto err2; | |
4200 | ||
3971ca14 PNA |
4201 | nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, desc.len); |
4202 | ||
4203 | err = -ENOMEM; | |
4204 | elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data, NULL, 0, | |
4205 | GFP_KERNEL); | |
4206 | if (elem.priv == NULL) | |
4207 | goto err2; | |
4208 | ||
4209 | ext = nft_set_elem_ext(set, elem.priv); | |
4210 | if (flags) | |
4211 | *nft_set_ext_flags(ext) = flags; | |
4212 | ||
60319eb1 | 4213 | trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set); |
609ccf08 JL |
4214 | if (trans == NULL) { |
4215 | err = -ENOMEM; | |
3971ca14 | 4216 | goto err3; |
609ccf08 | 4217 | } |
20a69341 | 4218 | |
42a55769 | 4219 | priv = set->ops->deactivate(ctx->net, set, &elem); |
3971ca14 | 4220 | if (priv == NULL) { |
cc02e457 | 4221 | err = -ENOENT; |
3971ca14 | 4222 | goto err4; |
cc02e457 | 4223 | } |
3971ca14 PNA |
4224 | kfree(elem.priv); |
4225 | elem.priv = priv; | |
cc02e457 | 4226 | |
59105446 PNA |
4227 | nft_set_elem_deactivate(ctx->net, set, &elem); |
4228 | ||
60319eb1 | 4229 | nft_trans_elem(trans) = elem; |
46bbafce | 4230 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
0dc13625 | 4231 | return 0; |
cc02e457 | 4232 | |
3971ca14 | 4233 | err4: |
cc02e457 | 4234 | kfree(trans); |
3971ca14 PNA |
4235 | err3: |
4236 | kfree(elem.priv); | |
20a69341 | 4237 | err2: |
59105446 | 4238 | nft_data_release(&elem.key.val, desc.type); |
20a69341 PM |
4239 | err1: |
4240 | return err; | |
4241 | } | |
4242 | ||
8411b644 | 4243 | static int nft_flush_set(const struct nft_ctx *ctx, |
de70185d | 4244 | struct nft_set *set, |
8411b644 | 4245 | const struct nft_set_iter *iter, |
de70185d | 4246 | struct nft_set_elem *elem) |
8411b644 PNA |
4247 | { |
4248 | struct nft_trans *trans; | |
4249 | int err; | |
4250 | ||
4251 | trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM, | |
4252 | sizeof(struct nft_trans_elem), GFP_ATOMIC); | |
4253 | if (!trans) | |
4254 | return -ENOMEM; | |
4255 | ||
1ba1c414 | 4256 | if (!set->ops->flush(ctx->net, set, elem->priv)) { |
8411b644 PNA |
4257 | err = -ENOENT; |
4258 | goto err1; | |
4259 | } | |
b2c11e4b | 4260 | set->ndeact++; |
8411b644 | 4261 | |
de70185d PNA |
4262 | nft_trans_elem_set(trans) = set; |
4263 | nft_trans_elem(trans) = *elem; | |
8411b644 PNA |
4264 | list_add_tail(&trans->list, &ctx->net->nft.commit_list); |
4265 | ||
4266 | return 0; | |
4267 | err1: | |
4268 | kfree(trans); | |
4269 | return err; | |
4270 | } | |
4271 | ||
633c9a84 PNA |
4272 | static int nf_tables_delsetelem(struct net *net, struct sock *nlsk, |
4273 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
4274 | const struct nlattr * const nla[], |
4275 | struct netlink_ext_ack *extack) | |
20a69341 | 4276 | { |
f2a6d766 | 4277 | u8 genmask = nft_genmask_next(net); |
20a69341 PM |
4278 | const struct nlattr *attr; |
4279 | struct nft_set *set; | |
4280 | struct nft_ctx ctx; | |
60319eb1 | 4281 | int rem, err = 0; |
20a69341 | 4282 | |
f2a6d766 | 4283 | err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, genmask); |
20a69341 PM |
4284 | if (err < 0) |
4285 | return err; | |
4286 | ||
37a9cc52 PNA |
4287 | set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_ELEM_LIST_SET], |
4288 | genmask); | |
20a69341 PM |
4289 | if (IS_ERR(set)) |
4290 | return PTR_ERR(set); | |
4291 | if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT) | |
4292 | return -EBUSY; | |
4293 | ||
8411b644 | 4294 | if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL) { |
baa2d42c PNA |
4295 | struct nft_set_iter iter = { |
4296 | .genmask = genmask, | |
4297 | .fn = nft_flush_set, | |
8411b644 | 4298 | }; |
baa2d42c | 4299 | set->ops->walk(&ctx, set, &iter); |
8411b644 | 4300 | |
baa2d42c | 4301 | return iter.err; |
8411b644 PNA |
4302 | } |
4303 | ||
20a69341 PM |
4304 | nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) { |
4305 | err = nft_del_setelem(&ctx, set, attr); | |
4306 | if (err < 0) | |
60319eb1 | 4307 | break; |
4fefee57 | 4308 | |
3dd0673a | 4309 | set->ndeact++; |
20a69341 | 4310 | } |
60319eb1 | 4311 | return err; |
20a69341 PM |
4312 | } |
4313 | ||
cfed7e1b PM |
4314 | void nft_set_gc_batch_release(struct rcu_head *rcu) |
4315 | { | |
4316 | struct nft_set_gc_batch *gcb; | |
4317 | unsigned int i; | |
4318 | ||
4319 | gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu); | |
4320 | for (i = 0; i < gcb->head.cnt; i++) | |
61f9e292 | 4321 | nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true); |
cfed7e1b PM |
4322 | kfree(gcb); |
4323 | } | |
4324 | EXPORT_SYMBOL_GPL(nft_set_gc_batch_release); | |
4325 | ||
4326 | struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, | |
4327 | gfp_t gfp) | |
4328 | { | |
4329 | struct nft_set_gc_batch *gcb; | |
4330 | ||
4331 | gcb = kzalloc(sizeof(*gcb), gfp); | |
4332 | if (gcb == NULL) | |
4333 | return gcb; | |
4334 | gcb->head.set = set; | |
4335 | return gcb; | |
4336 | } | |
4337 | EXPORT_SYMBOL_GPL(nft_set_gc_batch_alloc); | |
4338 | ||
e5009240 PNA |
4339 | /* |
4340 | * Stateful objects | |
4341 | */ | |
4342 | ||
4343 | /** | |
4344 | * nft_register_obj- register nf_tables stateful object type | |
4345 | * @obj: object type | |
4346 | * | |
4347 | * Registers the object type for use with nf_tables. Returns zero on | |
4348 | * success or a negative errno code otherwise. | |
4349 | */ | |
4350 | int nft_register_obj(struct nft_object_type *obj_type) | |
4351 | { | |
4352 | if (obj_type->type == NFT_OBJECT_UNSPEC) | |
4353 | return -EINVAL; | |
4354 | ||
4355 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
4356 | list_add_rcu(&obj_type->list, &nf_tables_objects); | |
4357 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
4358 | return 0; | |
4359 | } | |
4360 | EXPORT_SYMBOL_GPL(nft_register_obj); | |
4361 | ||
4362 | /** | |
4363 | * nft_unregister_obj - unregister nf_tables object type | |
4364 | * @obj: object type | |
4365 | * | |
4366 | * Unregisters the object type for use with nf_tables. | |
4367 | */ | |
4368 | void nft_unregister_obj(struct nft_object_type *obj_type) | |
4369 | { | |
4370 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
4371 | list_del_rcu(&obj_type->list); | |
4372 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
4373 | } | |
4374 | EXPORT_SYMBOL_GPL(nft_unregister_obj); | |
4375 | ||
4376 | struct nft_object *nf_tables_obj_lookup(const struct nft_table *table, | |
4377 | const struct nlattr *nla, | |
4378 | u32 objtype, u8 genmask) | |
4379 | { | |
4380 | struct nft_object *obj; | |
4381 | ||
4382 | list_for_each_entry(obj, &table->objects, list) { | |
4383 | if (!nla_strcmp(nla, obj->name) && | |
dfc46034 | 4384 | objtype == obj->ops->type->type && |
e5009240 PNA |
4385 | nft_active_genmask(obj, genmask)) |
4386 | return obj; | |
4387 | } | |
4388 | return ERR_PTR(-ENOENT); | |
4389 | } | |
4390 | EXPORT_SYMBOL_GPL(nf_tables_obj_lookup); | |
4391 | ||
ae0662f8 | 4392 | static struct nft_object *nf_tables_obj_lookup_byhandle(const struct nft_table *table, |
4393 | const struct nlattr *nla, | |
4394 | u32 objtype, u8 genmask) | |
3ecbfd65 HS |
4395 | { |
4396 | struct nft_object *obj; | |
4397 | ||
4398 | list_for_each_entry(obj, &table->objects, list) { | |
4399 | if (be64_to_cpu(nla_get_be64(nla)) == obj->handle && | |
4400 | objtype == obj->ops->type->type && | |
4401 | nft_active_genmask(obj, genmask)) | |
4402 | return obj; | |
4403 | } | |
4404 | return ERR_PTR(-ENOENT); | |
4405 | } | |
4406 | ||
e5009240 | 4407 | static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = { |
b2fbd044 LZ |
4408 | [NFTA_OBJ_TABLE] = { .type = NLA_STRING, |
4409 | .len = NFT_TABLE_MAXNAMELEN - 1 }, | |
4410 | [NFTA_OBJ_NAME] = { .type = NLA_STRING, | |
4411 | .len = NFT_OBJ_MAXNAMELEN - 1 }, | |
e5009240 PNA |
4412 | [NFTA_OBJ_TYPE] = { .type = NLA_U32 }, |
4413 | [NFTA_OBJ_DATA] = { .type = NLA_NESTED }, | |
3ecbfd65 | 4414 | [NFTA_OBJ_HANDLE] = { .type = NLA_U64}, |
e5009240 PNA |
4415 | }; |
4416 | ||
84fba055 FW |
4417 | static struct nft_object *nft_obj_init(const struct nft_ctx *ctx, |
4418 | const struct nft_object_type *type, | |
e5009240 PNA |
4419 | const struct nlattr *attr) |
4420 | { | |
5b4c6e38 | 4421 | struct nlattr **tb; |
dfc46034 | 4422 | const struct nft_object_ops *ops; |
e5009240 | 4423 | struct nft_object *obj; |
5b4c6e38 GS |
4424 | int err = -ENOMEM; |
4425 | ||
4426 | tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL); | |
4427 | if (!tb) | |
4428 | goto err1; | |
e5009240 PNA |
4429 | |
4430 | if (attr) { | |
fceb6435 JB |
4431 | err = nla_parse_nested(tb, type->maxattr, attr, type->policy, |
4432 | NULL); | |
e5009240 | 4433 | if (err < 0) |
5b4c6e38 | 4434 | goto err2; |
e5009240 PNA |
4435 | } else { |
4436 | memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1)); | |
4437 | } | |
4438 | ||
dfc46034 PBG |
4439 | if (type->select_ops) { |
4440 | ops = type->select_ops(ctx, (const struct nlattr * const *)tb); | |
4441 | if (IS_ERR(ops)) { | |
4442 | err = PTR_ERR(ops); | |
5b4c6e38 | 4443 | goto err2; |
dfc46034 PBG |
4444 | } |
4445 | } else { | |
4446 | ops = type->ops; | |
4447 | } | |
4448 | ||
e5009240 | 4449 | err = -ENOMEM; |
dfc46034 | 4450 | obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL); |
5b4c6e38 GS |
4451 | if (!obj) |
4452 | goto err2; | |
e5009240 | 4453 | |
dfc46034 | 4454 | err = ops->init(ctx, (const struct nlattr * const *)tb, obj); |
e5009240 | 4455 | if (err < 0) |
5b4c6e38 | 4456 | goto err3; |
e5009240 | 4457 | |
dfc46034 PBG |
4458 | obj->ops = ops; |
4459 | ||
5b4c6e38 | 4460 | kfree(tb); |
e5009240 | 4461 | return obj; |
5b4c6e38 | 4462 | err3: |
e5009240 | 4463 | kfree(obj); |
5b4c6e38 GS |
4464 | err2: |
4465 | kfree(tb); | |
e5009240 PNA |
4466 | err1: |
4467 | return ERR_PTR(err); | |
4468 | } | |
4469 | ||
4470 | static int nft_object_dump(struct sk_buff *skb, unsigned int attr, | |
43da04a5 | 4471 | struct nft_object *obj, bool reset) |
e5009240 PNA |
4472 | { |
4473 | struct nlattr *nest; | |
4474 | ||
4475 | nest = nla_nest_start(skb, attr); | |
4476 | if (!nest) | |
4477 | goto nla_put_failure; | |
dfc46034 | 4478 | if (obj->ops->dump(skb, obj, reset) < 0) |
e5009240 PNA |
4479 | goto nla_put_failure; |
4480 | nla_nest_end(skb, nest); | |
4481 | return 0; | |
4482 | ||
4483 | nla_put_failure: | |
4484 | return -1; | |
4485 | } | |
4486 | ||
4487 | static const struct nft_object_type *__nft_obj_type_get(u32 objtype) | |
4488 | { | |
4489 | const struct nft_object_type *type; | |
4490 | ||
4491 | list_for_each_entry(type, &nf_tables_objects, list) { | |
4492 | if (objtype == type->type) | |
4493 | return type; | |
4494 | } | |
4495 | return NULL; | |
4496 | } | |
4497 | ||
4498 | static const struct nft_object_type *nft_obj_type_get(u32 objtype) | |
4499 | { | |
4500 | const struct nft_object_type *type; | |
4501 | ||
4502 | type = __nft_obj_type_get(objtype); | |
4503 | if (type != NULL && try_module_get(type->owner)) | |
4504 | return type; | |
4505 | ||
4506 | #ifdef CONFIG_MODULES | |
4507 | if (type == NULL) { | |
4508 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
4509 | request_module("nft-obj-%u", objtype); | |
4510 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
4511 | if (__nft_obj_type_get(objtype)) | |
4512 | return ERR_PTR(-EAGAIN); | |
4513 | } | |
4514 | #endif | |
4515 | return ERR_PTR(-ENOENT); | |
4516 | } | |
4517 | ||
4518 | static int nf_tables_newobj(struct net *net, struct sock *nlsk, | |
4519 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
4520 | const struct nlattr * const nla[], |
4521 | struct netlink_ext_ack *extack) | |
e5009240 PNA |
4522 | { |
4523 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
4524 | const struct nft_object_type *type; | |
4525 | u8 genmask = nft_genmask_next(net); | |
4526 | int family = nfmsg->nfgen_family; | |
e5009240 PNA |
4527 | struct nft_table *table; |
4528 | struct nft_object *obj; | |
4529 | struct nft_ctx ctx; | |
4530 | u32 objtype; | |
4531 | int err; | |
4532 | ||
4533 | if (!nla[NFTA_OBJ_TYPE] || | |
4534 | !nla[NFTA_OBJ_NAME] || | |
4535 | !nla[NFTA_OBJ_DATA]) | |
4536 | return -EINVAL; | |
4537 | ||
98319cb9 | 4538 | table = nf_tables_table_lookup(net, nla[NFTA_OBJ_TABLE], family, |
36596dad | 4539 | genmask); |
e5009240 PNA |
4540 | if (IS_ERR(table)) |
4541 | return PTR_ERR(table); | |
4542 | ||
4543 | objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); | |
4544 | obj = nf_tables_obj_lookup(table, nla[NFTA_OBJ_NAME], objtype, genmask); | |
4545 | if (IS_ERR(obj)) { | |
4546 | err = PTR_ERR(obj); | |
4547 | if (err != -ENOENT) | |
4548 | return err; | |
4549 | ||
1a28ad74 | 4550 | } else { |
e5009240 PNA |
4551 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
4552 | return -EEXIST; | |
4553 | ||
4554 | return 0; | |
4555 | } | |
4556 | ||
98319cb9 | 4557 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
e5009240 PNA |
4558 | |
4559 | type = nft_obj_type_get(objtype); | |
4560 | if (IS_ERR(type)) | |
4561 | return PTR_ERR(type); | |
4562 | ||
84fba055 | 4563 | obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]); |
e5009240 PNA |
4564 | if (IS_ERR(obj)) { |
4565 | err = PTR_ERR(obj); | |
4566 | goto err1; | |
4567 | } | |
18965317 | 4568 | obj->table = table; |
3ecbfd65 HS |
4569 | obj->handle = nf_tables_alloc_handle(table); |
4570 | ||
61509575 PS |
4571 | obj->name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL); |
4572 | if (!obj->name) { | |
4573 | err = -ENOMEM; | |
4574 | goto err2; | |
4575 | } | |
e5009240 PNA |
4576 | |
4577 | err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj); | |
4578 | if (err < 0) | |
61509575 | 4579 | goto err3; |
e5009240 PNA |
4580 | |
4581 | list_add_tail_rcu(&obj->list, &table->objects); | |
4582 | table->use++; | |
4583 | return 0; | |
61509575 PS |
4584 | err3: |
4585 | kfree(obj->name); | |
e5009240 | 4586 | err2: |
dfc46034 PBG |
4587 | if (obj->ops->destroy) |
4588 | obj->ops->destroy(obj); | |
e5009240 PNA |
4589 | kfree(obj); |
4590 | err1: | |
4591 | module_put(type->owner); | |
4592 | return err; | |
4593 | } | |
4594 | ||
4595 | static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net, | |
4596 | u32 portid, u32 seq, int event, u32 flags, | |
4597 | int family, const struct nft_table *table, | |
43da04a5 | 4598 | struct nft_object *obj, bool reset) |
e5009240 PNA |
4599 | { |
4600 | struct nfgenmsg *nfmsg; | |
4601 | struct nlmsghdr *nlh; | |
4602 | ||
dedb67c4 | 4603 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); |
e5009240 PNA |
4604 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); |
4605 | if (nlh == NULL) | |
4606 | goto nla_put_failure; | |
4607 | ||
4608 | nfmsg = nlmsg_data(nlh); | |
4609 | nfmsg->nfgen_family = family; | |
4610 | nfmsg->version = NFNETLINK_V0; | |
4611 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); | |
4612 | ||
4613 | if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) || | |
4614 | nla_put_string(skb, NFTA_OBJ_NAME, obj->name) || | |
dfc46034 | 4615 | nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) || |
e5009240 | 4616 | nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) || |
3ecbfd65 HS |
4617 | nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset) || |
4618 | nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle), | |
4619 | NFTA_OBJ_PAD)) | |
e5009240 PNA |
4620 | goto nla_put_failure; |
4621 | ||
4622 | nlmsg_end(skb, nlh); | |
4623 | return 0; | |
4624 | ||
4625 | nla_put_failure: | |
4626 | nlmsg_trim(skb, nlh); | |
4627 | return -1; | |
4628 | } | |
4629 | ||
a9fea2a3 | 4630 | struct nft_obj_filter { |
e46abbcc | 4631 | char *table; |
a9fea2a3 PNA |
4632 | u32 type; |
4633 | }; | |
4634 | ||
e5009240 PNA |
4635 | static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb) |
4636 | { | |
4637 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
e5009240 | 4638 | const struct nft_table *table; |
e5009240 | 4639 | unsigned int idx = 0, s_idx = cb->args[0]; |
a9fea2a3 | 4640 | struct nft_obj_filter *filter = cb->data; |
e5009240 PNA |
4641 | struct net *net = sock_net(skb->sk); |
4642 | int family = nfmsg->nfgen_family; | |
43da04a5 PNA |
4643 | struct nft_object *obj; |
4644 | bool reset = false; | |
4645 | ||
4646 | if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET) | |
4647 | reset = true; | |
e5009240 PNA |
4648 | |
4649 | rcu_read_lock(); | |
4650 | cb->seq = net->nft.base_seq; | |
4651 | ||
36596dad | 4652 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
98319cb9 | 4653 | if (family != NFPROTO_UNSPEC && family != table->family) |
e5009240 PNA |
4654 | continue; |
4655 | ||
36596dad PNA |
4656 | list_for_each_entry_rcu(obj, &table->objects, list) { |
4657 | if (!nft_is_active(net, obj)) | |
4658 | goto cont; | |
4659 | if (idx < s_idx) | |
4660 | goto cont; | |
4661 | if (idx > s_idx) | |
4662 | memset(&cb->args[1], 0, | |
4663 | sizeof(cb->args) - sizeof(cb->args[0])); | |
4664 | if (filter && filter->table[0] && | |
4665 | strcmp(filter->table, table->name)) | |
4666 | goto cont; | |
4667 | if (filter && | |
4668 | filter->type != NFT_OBJECT_UNSPEC && | |
4669 | obj->ops->type->type != filter->type) | |
4670 | goto cont; | |
a9fea2a3 | 4671 | |
36596dad PNA |
4672 | if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid, |
4673 | cb->nlh->nlmsg_seq, | |
4674 | NFT_MSG_NEWOBJ, | |
4675 | NLM_F_MULTI | NLM_F_APPEND, | |
98319cb9 | 4676 | table->family, table, |
36596dad PNA |
4677 | obj, reset) < 0) |
4678 | goto done; | |
e5009240 | 4679 | |
36596dad | 4680 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
e5009240 | 4681 | cont: |
36596dad | 4682 | idx++; |
e5009240 PNA |
4683 | } |
4684 | } | |
4685 | done: | |
4686 | rcu_read_unlock(); | |
4687 | ||
4688 | cb->args[0] = idx; | |
4689 | return skb->len; | |
4690 | } | |
4691 | ||
a9fea2a3 PNA |
4692 | static int nf_tables_dump_obj_done(struct netlink_callback *cb) |
4693 | { | |
e46abbcc PS |
4694 | struct nft_obj_filter *filter = cb->data; |
4695 | ||
8bea728d HL |
4696 | if (filter) { |
4697 | kfree(filter->table); | |
4698 | kfree(filter); | |
4699 | } | |
a9fea2a3 PNA |
4700 | |
4701 | return 0; | |
4702 | } | |
4703 | ||
4704 | static struct nft_obj_filter * | |
4705 | nft_obj_filter_alloc(const struct nlattr * const nla[]) | |
4706 | { | |
4707 | struct nft_obj_filter *filter; | |
4708 | ||
4709 | filter = kzalloc(sizeof(*filter), GFP_KERNEL); | |
4710 | if (!filter) | |
4711 | return ERR_PTR(-ENOMEM); | |
4712 | ||
e46abbcc PS |
4713 | if (nla[NFTA_OBJ_TABLE]) { |
4714 | filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_KERNEL); | |
4715 | if (!filter->table) { | |
4716 | kfree(filter); | |
4717 | return ERR_PTR(-ENOMEM); | |
4718 | } | |
4719 | } | |
a9fea2a3 PNA |
4720 | if (nla[NFTA_OBJ_TYPE]) |
4721 | filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); | |
4722 | ||
4723 | return filter; | |
4724 | } | |
4725 | ||
e5009240 PNA |
4726 | static int nf_tables_getobj(struct net *net, struct sock *nlsk, |
4727 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
4728 | const struct nlattr * const nla[], |
4729 | struct netlink_ext_ack *extack) | |
e5009240 PNA |
4730 | { |
4731 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
4732 | u8 genmask = nft_genmask_cur(net); | |
4733 | int family = nfmsg->nfgen_family; | |
e5009240 PNA |
4734 | const struct nft_table *table; |
4735 | struct nft_object *obj; | |
4736 | struct sk_buff *skb2; | |
43da04a5 | 4737 | bool reset = false; |
e5009240 PNA |
4738 | u32 objtype; |
4739 | int err; | |
4740 | ||
4741 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
4742 | struct netlink_dump_control c = { | |
4743 | .dump = nf_tables_dump_obj, | |
a9fea2a3 | 4744 | .done = nf_tables_dump_obj_done, |
e5009240 | 4745 | }; |
a9fea2a3 PNA |
4746 | |
4747 | if (nla[NFTA_OBJ_TABLE] || | |
4748 | nla[NFTA_OBJ_TYPE]) { | |
4749 | struct nft_obj_filter *filter; | |
4750 | ||
4751 | filter = nft_obj_filter_alloc(nla); | |
4752 | if (IS_ERR(filter)) | |
4753 | return -ENOMEM; | |
4754 | ||
4755 | c.data = filter; | |
4756 | } | |
e5009240 PNA |
4757 | return netlink_dump_start(nlsk, skb, nlh, &c); |
4758 | } | |
4759 | ||
4760 | if (!nla[NFTA_OBJ_NAME] || | |
4761 | !nla[NFTA_OBJ_TYPE]) | |
4762 | return -EINVAL; | |
4763 | ||
98319cb9 | 4764 | table = nf_tables_table_lookup(net, nla[NFTA_OBJ_TABLE], family, |
36596dad | 4765 | genmask); |
e5009240 PNA |
4766 | if (IS_ERR(table)) |
4767 | return PTR_ERR(table); | |
4768 | ||
4769 | objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); | |
4770 | obj = nf_tables_obj_lookup(table, nla[NFTA_OBJ_NAME], objtype, genmask); | |
4771 | if (IS_ERR(obj)) | |
4772 | return PTR_ERR(obj); | |
4773 | ||
4774 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
4775 | if (!skb2) | |
4776 | return -ENOMEM; | |
4777 | ||
43da04a5 PNA |
4778 | if (NFNL_MSG_TYPE(nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET) |
4779 | reset = true; | |
4780 | ||
e5009240 PNA |
4781 | err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid, |
4782 | nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0, | |
43da04a5 | 4783 | family, table, obj, reset); |
e5009240 PNA |
4784 | if (err < 0) |
4785 | goto err; | |
4786 | ||
4787 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
4788 | err: | |
4789 | kfree_skb(skb2); | |
4790 | return err; | |
e5009240 PNA |
4791 | } |
4792 | ||
4793 | static void nft_obj_destroy(struct nft_object *obj) | |
4794 | { | |
dfc46034 PBG |
4795 | if (obj->ops->destroy) |
4796 | obj->ops->destroy(obj); | |
e5009240 | 4797 | |
dfc46034 | 4798 | module_put(obj->ops->type->owner); |
61509575 | 4799 | kfree(obj->name); |
e5009240 PNA |
4800 | kfree(obj); |
4801 | } | |
4802 | ||
4803 | static int nf_tables_delobj(struct net *net, struct sock *nlsk, | |
04ba724b PNA |
4804 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
4805 | const struct nlattr * const nla[], | |
4806 | struct netlink_ext_ack *extack) | |
e5009240 PNA |
4807 | { |
4808 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
4809 | u8 genmask = nft_genmask_next(net); | |
4810 | int family = nfmsg->nfgen_family; | |
e5009240 PNA |
4811 | struct nft_table *table; |
4812 | struct nft_object *obj; | |
4813 | struct nft_ctx ctx; | |
4814 | u32 objtype; | |
4815 | ||
4816 | if (!nla[NFTA_OBJ_TYPE] || | |
3ecbfd65 | 4817 | (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE])) |
e5009240 PNA |
4818 | return -EINVAL; |
4819 | ||
98319cb9 | 4820 | table = nf_tables_table_lookup(net, nla[NFTA_OBJ_TABLE], family, |
36596dad | 4821 | genmask); |
e5009240 PNA |
4822 | if (IS_ERR(table)) |
4823 | return PTR_ERR(table); | |
4824 | ||
4825 | objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); | |
3ecbfd65 HS |
4826 | if (nla[NFTA_OBJ_HANDLE]) |
4827 | obj = nf_tables_obj_lookup_byhandle(table, nla[NFTA_OBJ_HANDLE], | |
4828 | objtype, genmask); | |
4829 | else | |
4830 | obj = nf_tables_obj_lookup(table, nla[NFTA_OBJ_NAME], | |
4831 | objtype, genmask); | |
e5009240 PNA |
4832 | if (IS_ERR(obj)) |
4833 | return PTR_ERR(obj); | |
4834 | if (obj->use > 0) | |
4835 | return -EBUSY; | |
4836 | ||
98319cb9 | 4837 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
e5009240 PNA |
4838 | |
4839 | return nft_delobj(&ctx, obj); | |
4840 | } | |
4841 | ||
25e94a99 PNA |
4842 | void nft_obj_notify(struct net *net, struct nft_table *table, |
4843 | struct nft_object *obj, u32 portid, u32 seq, int event, | |
4844 | int family, int report, gfp_t gfp) | |
e5009240 PNA |
4845 | { |
4846 | struct sk_buff *skb; | |
4847 | int err; | |
4848 | ||
2599e989 PNA |
4849 | if (!report && |
4850 | !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) | |
25e94a99 | 4851 | return; |
e5009240 | 4852 | |
2599e989 | 4853 | skb = nlmsg_new(NLMSG_GOODSIZE, gfp); |
e5009240 PNA |
4854 | if (skb == NULL) |
4855 | goto err; | |
4856 | ||
2599e989 PNA |
4857 | err = nf_tables_fill_obj_info(skb, net, portid, seq, event, 0, family, |
4858 | table, obj, false); | |
e5009240 PNA |
4859 | if (err < 0) { |
4860 | kfree_skb(skb); | |
4861 | goto err; | |
4862 | } | |
4863 | ||
25e94a99 PNA |
4864 | nfnetlink_send(skb, net, portid, NFNLGRP_NFTABLES, report, gfp); |
4865 | return; | |
e5009240 | 4866 | err: |
25e94a99 | 4867 | nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS); |
e5009240 | 4868 | } |
2599e989 PNA |
4869 | EXPORT_SYMBOL_GPL(nft_obj_notify); |
4870 | ||
25e94a99 PNA |
4871 | static void nf_tables_obj_notify(const struct nft_ctx *ctx, |
4872 | struct nft_object *obj, int event) | |
2599e989 | 4873 | { |
25e94a99 | 4874 | nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event, |
36596dad | 4875 | ctx->family, ctx->report, GFP_KERNEL); |
2599e989 | 4876 | } |
e5009240 | 4877 | |
3b49e2e9 PNA |
4878 | /* |
4879 | * Flow tables | |
4880 | */ | |
4881 | void nft_register_flowtable_type(struct nf_flowtable_type *type) | |
4882 | { | |
4883 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
4884 | list_add_tail_rcu(&type->list, &nf_tables_flowtables); | |
4885 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
4886 | } | |
4887 | EXPORT_SYMBOL_GPL(nft_register_flowtable_type); | |
4888 | ||
4889 | void nft_unregister_flowtable_type(struct nf_flowtable_type *type) | |
4890 | { | |
4891 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
4892 | list_del_rcu(&type->list); | |
4893 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
4894 | } | |
4895 | EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type); | |
4896 | ||
4897 | static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = { | |
4898 | [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING, | |
4899 | .len = NFT_NAME_MAXLEN - 1 }, | |
4900 | [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING, | |
4901 | .len = NFT_NAME_MAXLEN - 1 }, | |
4902 | [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED }, | |
3ecbfd65 | 4903 | [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 }, |
3b49e2e9 PNA |
4904 | }; |
4905 | ||
4906 | struct nft_flowtable *nf_tables_flowtable_lookup(const struct nft_table *table, | |
4907 | const struct nlattr *nla, | |
4908 | u8 genmask) | |
4909 | { | |
4910 | struct nft_flowtable *flowtable; | |
4911 | ||
4912 | list_for_each_entry(flowtable, &table->flowtables, list) { | |
4913 | if (!nla_strcmp(nla, flowtable->name) && | |
4914 | nft_active_genmask(flowtable, genmask)) | |
4915 | return flowtable; | |
4916 | } | |
4917 | return ERR_PTR(-ENOENT); | |
4918 | } | |
4919 | EXPORT_SYMBOL_GPL(nf_tables_flowtable_lookup); | |
4920 | ||
ae0662f8 | 4921 | static struct nft_flowtable * |
3ecbfd65 HS |
4922 | nf_tables_flowtable_lookup_byhandle(const struct nft_table *table, |
4923 | const struct nlattr *nla, u8 genmask) | |
4924 | { | |
4925 | struct nft_flowtable *flowtable; | |
4926 | ||
4927 | list_for_each_entry(flowtable, &table->flowtables, list) { | |
4928 | if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle && | |
4929 | nft_active_genmask(flowtable, genmask)) | |
4930 | return flowtable; | |
4931 | } | |
4932 | return ERR_PTR(-ENOENT); | |
4933 | } | |
4934 | ||
3b49e2e9 PNA |
4935 | static int nf_tables_parse_devices(const struct nft_ctx *ctx, |
4936 | const struct nlattr *attr, | |
4937 | struct net_device *dev_array[], int *len) | |
4938 | { | |
4939 | const struct nlattr *tmp; | |
4940 | struct net_device *dev; | |
4941 | char ifname[IFNAMSIZ]; | |
4942 | int rem, n = 0, err; | |
4943 | ||
4944 | nla_for_each_nested(tmp, attr, rem) { | |
4945 | if (nla_type(tmp) != NFTA_DEVICE_NAME) { | |
4946 | err = -EINVAL; | |
4947 | goto err1; | |
4948 | } | |
4949 | ||
4950 | nla_strlcpy(ifname, tmp, IFNAMSIZ); | |
90d2723c | 4951 | dev = __dev_get_by_name(ctx->net, ifname); |
3b49e2e9 PNA |
4952 | if (!dev) { |
4953 | err = -ENOENT; | |
4954 | goto err1; | |
4955 | } | |
4956 | ||
4957 | dev_array[n++] = dev; | |
4958 | if (n == NFT_FLOWTABLE_DEVICE_MAX) { | |
4959 | err = -EFBIG; | |
4960 | goto err1; | |
4961 | } | |
4962 | } | |
4963 | if (!len) | |
4964 | return -EINVAL; | |
4965 | ||
4966 | err = 0; | |
4967 | err1: | |
4968 | *len = n; | |
4969 | return err; | |
4970 | } | |
4971 | ||
4972 | static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = { | |
4973 | [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 }, | |
4974 | [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 }, | |
4975 | [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED }, | |
4976 | }; | |
4977 | ||
4978 | static int nf_tables_flowtable_parse_hook(const struct nft_ctx *ctx, | |
4979 | const struct nlattr *attr, | |
4980 | struct nft_flowtable *flowtable) | |
4981 | { | |
4982 | struct net_device *dev_array[NFT_FLOWTABLE_DEVICE_MAX]; | |
4983 | struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1]; | |
4984 | struct nf_hook_ops *ops; | |
4985 | int hooknum, priority; | |
4986 | int err, n = 0, i; | |
4987 | ||
4988 | err = nla_parse_nested(tb, NFTA_FLOWTABLE_HOOK_MAX, attr, | |
4989 | nft_flowtable_hook_policy, NULL); | |
4990 | if (err < 0) | |
4991 | return err; | |
4992 | ||
4993 | if (!tb[NFTA_FLOWTABLE_HOOK_NUM] || | |
4994 | !tb[NFTA_FLOWTABLE_HOOK_PRIORITY] || | |
4995 | !tb[NFTA_FLOWTABLE_HOOK_DEVS]) | |
4996 | return -EINVAL; | |
4997 | ||
4998 | hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM])); | |
fe19c04c | 4999 | if (hooknum != NF_NETDEV_INGRESS) |
3b49e2e9 PNA |
5000 | return -EINVAL; |
5001 | ||
5002 | priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY])); | |
5003 | ||
5004 | err = nf_tables_parse_devices(ctx, tb[NFTA_FLOWTABLE_HOOK_DEVS], | |
5005 | dev_array, &n); | |
5006 | if (err < 0) | |
d92191aa | 5007 | return err; |
3b49e2e9 PNA |
5008 | |
5009 | ops = kzalloc(sizeof(struct nf_hook_ops) * n, GFP_KERNEL); | |
90d2723c PNA |
5010 | if (!ops) |
5011 | return -ENOMEM; | |
3b49e2e9 | 5012 | |
0e839dfa PNA |
5013 | flowtable->hooknum = hooknum; |
5014 | flowtable->priority = priority; | |
3b49e2e9 PNA |
5015 | flowtable->ops = ops; |
5016 | flowtable->ops_len = n; | |
5017 | ||
5018 | for (i = 0; i < n; i++) { | |
5019 | flowtable->ops[i].pf = NFPROTO_NETDEV; | |
5020 | flowtable->ops[i].hooknum = hooknum; | |
5021 | flowtable->ops[i].priority = priority; | |
17857d92 | 5022 | flowtable->ops[i].priv = &flowtable->data; |
3b49e2e9 PNA |
5023 | flowtable->ops[i].hook = flowtable->data.type->hook; |
5024 | flowtable->ops[i].dev = dev_array[i]; | |
d92191aa PNA |
5025 | flowtable->dev_name[i] = kstrdup(dev_array[i]->name, |
5026 | GFP_KERNEL); | |
3b49e2e9 PNA |
5027 | } |
5028 | ||
3b49e2e9 PNA |
5029 | return err; |
5030 | } | |
5031 | ||
98319cb9 | 5032 | static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family) |
3b49e2e9 PNA |
5033 | { |
5034 | const struct nf_flowtable_type *type; | |
5035 | ||
5036 | list_for_each_entry(type, &nf_tables_flowtables, list) { | |
98319cb9 | 5037 | if (family == type->family) |
3b49e2e9 PNA |
5038 | return type; |
5039 | } | |
5040 | return NULL; | |
5041 | } | |
5042 | ||
98319cb9 | 5043 | static const struct nf_flowtable_type *nft_flowtable_type_get(u8 family) |
3b49e2e9 PNA |
5044 | { |
5045 | const struct nf_flowtable_type *type; | |
5046 | ||
98319cb9 | 5047 | type = __nft_flowtable_type_get(family); |
3b49e2e9 PNA |
5048 | if (type != NULL && try_module_get(type->owner)) |
5049 | return type; | |
5050 | ||
5051 | #ifdef CONFIG_MODULES | |
5052 | if (type == NULL) { | |
5053 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
98319cb9 | 5054 | request_module("nf-flowtable-%u", family); |
3b49e2e9 | 5055 | nfnl_lock(NFNL_SUBSYS_NFTABLES); |
98319cb9 | 5056 | if (__nft_flowtable_type_get(family)) |
3b49e2e9 PNA |
5057 | return ERR_PTR(-EAGAIN); |
5058 | } | |
5059 | #endif | |
5060 | return ERR_PTR(-ENOENT); | |
5061 | } | |
5062 | ||
3b49e2e9 PNA |
5063 | static void nft_unregister_flowtable_net_hooks(struct net *net, |
5064 | struct nft_flowtable *flowtable) | |
5065 | { | |
5066 | int i; | |
5067 | ||
5068 | for (i = 0; i < flowtable->ops_len; i++) { | |
5069 | if (!flowtable->ops[i].dev) | |
5070 | continue; | |
5071 | ||
5072 | nf_unregister_net_hook(net, &flowtable->ops[i]); | |
5073 | } | |
5074 | } | |
5075 | ||
5076 | static int nf_tables_newflowtable(struct net *net, struct sock *nlsk, | |
5077 | struct sk_buff *skb, | |
5078 | const struct nlmsghdr *nlh, | |
5079 | const struct nlattr * const nla[], | |
5080 | struct netlink_ext_ack *extack) | |
5081 | { | |
5082 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
5083 | const struct nf_flowtable_type *type; | |
32fc7187 | 5084 | struct nft_flowtable *flowtable, *ft; |
3b49e2e9 PNA |
5085 | u8 genmask = nft_genmask_next(net); |
5086 | int family = nfmsg->nfgen_family; | |
3b49e2e9 PNA |
5087 | struct nft_table *table; |
5088 | struct nft_ctx ctx; | |
5089 | int err, i, k; | |
5090 | ||
5091 | if (!nla[NFTA_FLOWTABLE_TABLE] || | |
5092 | !nla[NFTA_FLOWTABLE_NAME] || | |
5093 | !nla[NFTA_FLOWTABLE_HOOK]) | |
5094 | return -EINVAL; | |
5095 | ||
36596dad | 5096 | table = nf_tables_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], |
98319cb9 | 5097 | family, genmask); |
3b49e2e9 PNA |
5098 | if (IS_ERR(table)) |
5099 | return PTR_ERR(table); | |
5100 | ||
5101 | flowtable = nf_tables_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME], | |
5102 | genmask); | |
5103 | if (IS_ERR(flowtable)) { | |
5104 | err = PTR_ERR(flowtable); | |
5105 | if (err != -ENOENT) | |
5106 | return err; | |
5107 | } else { | |
5108 | if (nlh->nlmsg_flags & NLM_F_EXCL) | |
5109 | return -EEXIST; | |
5110 | ||
5111 | return 0; | |
5112 | } | |
5113 | ||
98319cb9 | 5114 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
3b49e2e9 PNA |
5115 | |
5116 | flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL); | |
5117 | if (!flowtable) | |
5118 | return -ENOMEM; | |
5119 | ||
5120 | flowtable->table = table; | |
3ecbfd65 HS |
5121 | flowtable->handle = nf_tables_alloc_handle(table); |
5122 | ||
3b49e2e9 PNA |
5123 | flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL); |
5124 | if (!flowtable->name) { | |
5125 | err = -ENOMEM; | |
5126 | goto err1; | |
5127 | } | |
5128 | ||
98319cb9 | 5129 | type = nft_flowtable_type_get(family); |
3b49e2e9 PNA |
5130 | if (IS_ERR(type)) { |
5131 | err = PTR_ERR(type); | |
5132 | goto err2; | |
5133 | } | |
5134 | ||
5135 | flowtable->data.type = type; | |
a268de77 | 5136 | err = type->init(&flowtable->data); |
3b49e2e9 PNA |
5137 | if (err < 0) |
5138 | goto err3; | |
5139 | ||
5140 | err = nf_tables_flowtable_parse_hook(&ctx, nla[NFTA_FLOWTABLE_HOOK], | |
5141 | flowtable); | |
5142 | if (err < 0) | |
a268de77 | 5143 | goto err4; |
3b49e2e9 PNA |
5144 | |
5145 | for (i = 0; i < flowtable->ops_len; i++) { | |
32fc7187 PNA |
5146 | if (!flowtable->ops[i].dev) |
5147 | continue; | |
5148 | ||
5149 | list_for_each_entry(ft, &table->flowtables, list) { | |
5150 | for (k = 0; k < ft->ops_len; k++) { | |
5151 | if (!ft->ops[k].dev) | |
5152 | continue; | |
5153 | ||
5154 | if (flowtable->ops[i].dev == ft->ops[k].dev && | |
5155 | flowtable->ops[i].pf == ft->ops[k].pf) { | |
5156 | err = -EBUSY; | |
a268de77 | 5157 | goto err5; |
32fc7187 PNA |
5158 | } |
5159 | } | |
5160 | } | |
5161 | ||
3b49e2e9 PNA |
5162 | err = nf_register_net_hook(net, &flowtable->ops[i]); |
5163 | if (err < 0) | |
a268de77 | 5164 | goto err5; |
3b49e2e9 PNA |
5165 | } |
5166 | ||
5167 | err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable); | |
5168 | if (err < 0) | |
a268de77 | 5169 | goto err6; |
3b49e2e9 PNA |
5170 | |
5171 | list_add_tail_rcu(&flowtable->list, &table->flowtables); | |
5172 | table->use++; | |
5173 | ||
5174 | return 0; | |
a268de77 | 5175 | err6: |
3b49e2e9 | 5176 | i = flowtable->ops_len; |
a268de77 | 5177 | err5: |
d92191aa PNA |
5178 | for (k = i - 1; k >= 0; k--) { |
5179 | kfree(flowtable->dev_name[k]); | |
0e0d5002 | 5180 | nf_unregister_net_hook(net, &flowtable->ops[k]); |
d92191aa | 5181 | } |
3b49e2e9 PNA |
5182 | |
5183 | kfree(flowtable->ops); | |
a268de77 FF |
5184 | err4: |
5185 | flowtable->data.type->free(&flowtable->data); | |
3b49e2e9 PNA |
5186 | err3: |
5187 | module_put(type->owner); | |
5188 | err2: | |
5189 | kfree(flowtable->name); | |
5190 | err1: | |
5191 | kfree(flowtable); | |
5192 | return err; | |
5193 | } | |
5194 | ||
5195 | static int nf_tables_delflowtable(struct net *net, struct sock *nlsk, | |
5196 | struct sk_buff *skb, | |
5197 | const struct nlmsghdr *nlh, | |
5198 | const struct nlattr * const nla[], | |
5199 | struct netlink_ext_ack *extack) | |
5200 | { | |
5201 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
5202 | u8 genmask = nft_genmask_next(net); | |
5203 | int family = nfmsg->nfgen_family; | |
5204 | struct nft_flowtable *flowtable; | |
3b49e2e9 PNA |
5205 | struct nft_table *table; |
5206 | struct nft_ctx ctx; | |
5207 | ||
e603ea4b PNA |
5208 | if (!nla[NFTA_FLOWTABLE_TABLE] || |
5209 | (!nla[NFTA_FLOWTABLE_NAME] && | |
5210 | !nla[NFTA_FLOWTABLE_HANDLE])) | |
5211 | return -EINVAL; | |
5212 | ||
36596dad | 5213 | table = nf_tables_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], |
98319cb9 | 5214 | family, genmask); |
3b49e2e9 PNA |
5215 | if (IS_ERR(table)) |
5216 | return PTR_ERR(table); | |
5217 | ||
3ecbfd65 HS |
5218 | if (nla[NFTA_FLOWTABLE_HANDLE]) |
5219 | flowtable = nf_tables_flowtable_lookup_byhandle(table, | |
5220 | nla[NFTA_FLOWTABLE_HANDLE], | |
5221 | genmask); | |
5222 | else | |
5223 | flowtable = nf_tables_flowtable_lookup(table, | |
5224 | nla[NFTA_FLOWTABLE_NAME], | |
5225 | genmask); | |
3b49e2e9 PNA |
5226 | if (IS_ERR(flowtable)) |
5227 | return PTR_ERR(flowtable); | |
5228 | if (flowtable->use > 0) | |
5229 | return -EBUSY; | |
5230 | ||
98319cb9 | 5231 | nft_ctx_init(&ctx, net, skb, nlh, family, table, NULL, nla); |
3b49e2e9 PNA |
5232 | |
5233 | return nft_delflowtable(&ctx, flowtable); | |
5234 | } | |
5235 | ||
5236 | static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net, | |
5237 | u32 portid, u32 seq, int event, | |
5238 | u32 flags, int family, | |
5239 | struct nft_flowtable *flowtable) | |
5240 | { | |
5241 | struct nlattr *nest, *nest_devs; | |
5242 | struct nfgenmsg *nfmsg; | |
5243 | struct nlmsghdr *nlh; | |
5244 | int i; | |
5245 | ||
5246 | event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event); | |
5247 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), flags); | |
5248 | if (nlh == NULL) | |
5249 | goto nla_put_failure; | |
5250 | ||
5251 | nfmsg = nlmsg_data(nlh); | |
5252 | nfmsg->nfgen_family = family; | |
5253 | nfmsg->version = NFNETLINK_V0; | |
5254 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); | |
5255 | ||
5256 | if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) || | |
5257 | nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) || | |
3ecbfd65 HS |
5258 | nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) || |
5259 | nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle), | |
5260 | NFTA_FLOWTABLE_PAD)) | |
3b49e2e9 PNA |
5261 | goto nla_put_failure; |
5262 | ||
5263 | nest = nla_nest_start(skb, NFTA_FLOWTABLE_HOOK); | |
5264 | if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) || | |
5265 | nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->priority))) | |
5266 | goto nla_put_failure; | |
5267 | ||
5268 | nest_devs = nla_nest_start(skb, NFTA_FLOWTABLE_HOOK_DEVS); | |
5269 | if (!nest_devs) | |
5270 | goto nla_put_failure; | |
5271 | ||
5272 | for (i = 0; i < flowtable->ops_len; i++) { | |
d92191aa | 5273 | if (flowtable->dev_name[i][0] && |
3b49e2e9 | 5274 | nla_put_string(skb, NFTA_DEVICE_NAME, |
d92191aa | 5275 | flowtable->dev_name[i])) |
3b49e2e9 PNA |
5276 | goto nla_put_failure; |
5277 | } | |
5278 | nla_nest_end(skb, nest_devs); | |
5279 | nla_nest_end(skb, nest); | |
5280 | ||
5281 | nlmsg_end(skb, nlh); | |
5282 | return 0; | |
5283 | ||
5284 | nla_put_failure: | |
5285 | nlmsg_trim(skb, nlh); | |
5286 | return -1; | |
5287 | } | |
5288 | ||
5289 | struct nft_flowtable_filter { | |
5290 | char *table; | |
5291 | }; | |
5292 | ||
5293 | static int nf_tables_dump_flowtable(struct sk_buff *skb, | |
5294 | struct netlink_callback *cb) | |
5295 | { | |
5296 | const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh); | |
5297 | struct nft_flowtable_filter *filter = cb->data; | |
5298 | unsigned int idx = 0, s_idx = cb->args[0]; | |
5299 | struct net *net = sock_net(skb->sk); | |
5300 | int family = nfmsg->nfgen_family; | |
5301 | struct nft_flowtable *flowtable; | |
3b49e2e9 PNA |
5302 | const struct nft_table *table; |
5303 | ||
5304 | rcu_read_lock(); | |
5305 | cb->seq = net->nft.base_seq; | |
5306 | ||
36596dad | 5307 | list_for_each_entry_rcu(table, &net->nft.tables, list) { |
98319cb9 | 5308 | if (family != NFPROTO_UNSPEC && family != table->family) |
3b49e2e9 PNA |
5309 | continue; |
5310 | ||
36596dad PNA |
5311 | list_for_each_entry_rcu(flowtable, &table->flowtables, list) { |
5312 | if (!nft_is_active(net, flowtable)) | |
5313 | goto cont; | |
5314 | if (idx < s_idx) | |
5315 | goto cont; | |
5316 | if (idx > s_idx) | |
5317 | memset(&cb->args[1], 0, | |
5318 | sizeof(cb->args) - sizeof(cb->args[0])); | |
5319 | if (filter && filter->table[0] && | |
5320 | strcmp(filter->table, table->name)) | |
5321 | goto cont; | |
3b49e2e9 | 5322 | |
36596dad PNA |
5323 | if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid, |
5324 | cb->nlh->nlmsg_seq, | |
5325 | NFT_MSG_NEWFLOWTABLE, | |
5326 | NLM_F_MULTI | NLM_F_APPEND, | |
98319cb9 | 5327 | table->family, flowtable) < 0) |
36596dad | 5328 | goto done; |
3b49e2e9 | 5329 | |
36596dad | 5330 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
3b49e2e9 | 5331 | cont: |
36596dad | 5332 | idx++; |
3b49e2e9 PNA |
5333 | } |
5334 | } | |
5335 | done: | |
5336 | rcu_read_unlock(); | |
5337 | ||
5338 | cb->args[0] = idx; | |
5339 | return skb->len; | |
5340 | } | |
5341 | ||
5342 | static int nf_tables_dump_flowtable_done(struct netlink_callback *cb) | |
5343 | { | |
5344 | struct nft_flowtable_filter *filter = cb->data; | |
5345 | ||
5346 | if (!filter) | |
5347 | return 0; | |
5348 | ||
5349 | kfree(filter->table); | |
5350 | kfree(filter); | |
5351 | ||
5352 | return 0; | |
5353 | } | |
5354 | ||
5355 | static struct nft_flowtable_filter * | |
5356 | nft_flowtable_filter_alloc(const struct nlattr * const nla[]) | |
5357 | { | |
5358 | struct nft_flowtable_filter *filter; | |
5359 | ||
5360 | filter = kzalloc(sizeof(*filter), GFP_KERNEL); | |
5361 | if (!filter) | |
5362 | return ERR_PTR(-ENOMEM); | |
5363 | ||
5364 | if (nla[NFTA_FLOWTABLE_TABLE]) { | |
5365 | filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE], | |
5366 | GFP_KERNEL); | |
5367 | if (!filter->table) { | |
5368 | kfree(filter); | |
5369 | return ERR_PTR(-ENOMEM); | |
5370 | } | |
5371 | } | |
5372 | return filter; | |
5373 | } | |
5374 | ||
5375 | static int nf_tables_getflowtable(struct net *net, struct sock *nlsk, | |
5376 | struct sk_buff *skb, | |
5377 | const struct nlmsghdr *nlh, | |
5378 | const struct nlattr * const nla[], | |
5379 | struct netlink_ext_ack *extack) | |
5380 | { | |
5381 | const struct nfgenmsg *nfmsg = nlmsg_data(nlh); | |
5382 | u8 genmask = nft_genmask_cur(net); | |
5383 | int family = nfmsg->nfgen_family; | |
5384 | struct nft_flowtable *flowtable; | |
3b49e2e9 PNA |
5385 | const struct nft_table *table; |
5386 | struct sk_buff *skb2; | |
5387 | int err; | |
5388 | ||
5389 | if (nlh->nlmsg_flags & NLM_F_DUMP) { | |
5390 | struct netlink_dump_control c = { | |
5391 | .dump = nf_tables_dump_flowtable, | |
5392 | .done = nf_tables_dump_flowtable_done, | |
5393 | }; | |
5394 | ||
5395 | if (nla[NFTA_FLOWTABLE_TABLE]) { | |
5396 | struct nft_flowtable_filter *filter; | |
5397 | ||
5398 | filter = nft_flowtable_filter_alloc(nla); | |
5399 | if (IS_ERR(filter)) | |
5400 | return -ENOMEM; | |
5401 | ||
5402 | c.data = filter; | |
5403 | } | |
5404 | return netlink_dump_start(nlsk, skb, nlh, &c); | |
5405 | } | |
5406 | ||
5407 | if (!nla[NFTA_FLOWTABLE_NAME]) | |
5408 | return -EINVAL; | |
5409 | ||
36596dad | 5410 | table = nf_tables_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], |
98319cb9 | 5411 | family, genmask); |
3b49e2e9 PNA |
5412 | if (IS_ERR(table)) |
5413 | return PTR_ERR(table); | |
5414 | ||
5415 | flowtable = nf_tables_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME], | |
5416 | genmask); | |
03a0120f | 5417 | if (IS_ERR(flowtable)) |
3b49e2e9 PNA |
5418 | return PTR_ERR(flowtable); |
5419 | ||
5420 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
5421 | if (!skb2) | |
5422 | return -ENOMEM; | |
5423 | ||
5424 | err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid, | |
5425 | nlh->nlmsg_seq, | |
5426 | NFT_MSG_NEWFLOWTABLE, 0, family, | |
5427 | flowtable); | |
5428 | if (err < 0) | |
5429 | goto err; | |
5430 | ||
5431 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
5432 | err: | |
5433 | kfree_skb(skb2); | |
5434 | return err; | |
5435 | } | |
5436 | ||
5437 | static void nf_tables_flowtable_notify(struct nft_ctx *ctx, | |
5438 | struct nft_flowtable *flowtable, | |
5439 | int event) | |
5440 | { | |
5441 | struct sk_buff *skb; | |
5442 | int err; | |
5443 | ||
5444 | if (ctx->report && | |
5445 | !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES)) | |
5446 | return; | |
5447 | ||
5448 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
5449 | if (skb == NULL) | |
5450 | goto err; | |
5451 | ||
5452 | err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid, | |
5453 | ctx->seq, event, 0, | |
36596dad | 5454 | ctx->family, flowtable); |
3b49e2e9 PNA |
5455 | if (err < 0) { |
5456 | kfree_skb(skb); | |
5457 | goto err; | |
5458 | } | |
5459 | ||
5460 | nfnetlink_send(skb, ctx->net, ctx->portid, NFNLGRP_NFTABLES, | |
5461 | ctx->report, GFP_KERNEL); | |
5462 | return; | |
5463 | err: | |
5464 | nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS); | |
5465 | } | |
5466 | ||
3b49e2e9 PNA |
5467 | static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable) |
5468 | { | |
c04a3f73 | 5469 | kfree(flowtable->ops); |
3b49e2e9 | 5470 | kfree(flowtable->name); |
b408c5b0 | 5471 | flowtable->data.type->free(&flowtable->data); |
3b49e2e9 PNA |
5472 | module_put(flowtable->data.type->owner); |
5473 | } | |
5474 | ||
84d7fce6 PNA |
5475 | static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net, |
5476 | u32 portid, u32 seq) | |
5477 | { | |
5478 | struct nlmsghdr *nlh; | |
5479 | struct nfgenmsg *nfmsg; | |
784b4e61 | 5480 | char buf[TASK_COMM_LEN]; |
dedb67c4 | 5481 | int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN); |
84d7fce6 PNA |
5482 | |
5483 | nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct nfgenmsg), 0); | |
5484 | if (nlh == NULL) | |
5485 | goto nla_put_failure; | |
5486 | ||
5487 | nfmsg = nlmsg_data(nlh); | |
5488 | nfmsg->nfgen_family = AF_UNSPEC; | |
5489 | nfmsg->version = NFNETLINK_V0; | |
5490 | nfmsg->res_id = htons(net->nft.base_seq & 0xffff); | |
5491 | ||
784b4e61 PS |
5492 | if (nla_put_be32(skb, NFTA_GEN_ID, htonl(net->nft.base_seq)) || |
5493 | nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) || | |
5494 | nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current))) | |
84d7fce6 PNA |
5495 | goto nla_put_failure; |
5496 | ||
053c095a JB |
5497 | nlmsg_end(skb, nlh); |
5498 | return 0; | |
84d7fce6 PNA |
5499 | |
5500 | nla_put_failure: | |
5501 | nlmsg_trim(skb, nlh); | |
5502 | return -EMSGSIZE; | |
5503 | } | |
5504 | ||
3b49e2e9 PNA |
5505 | static void nft_flowtable_event(unsigned long event, struct net_device *dev, |
5506 | struct nft_flowtable *flowtable) | |
5507 | { | |
5508 | int i; | |
5509 | ||
5510 | for (i = 0; i < flowtable->ops_len; i++) { | |
5511 | if (flowtable->ops[i].dev != dev) | |
5512 | continue; | |
5513 | ||
5514 | nf_unregister_net_hook(dev_net(dev), &flowtable->ops[i]); | |
d92191aa | 5515 | flowtable->dev_name[i][0] = '\0'; |
3b49e2e9 PNA |
5516 | flowtable->ops[i].dev = NULL; |
5517 | break; | |
5518 | } | |
5519 | } | |
5520 | ||
5521 | static int nf_tables_flowtable_event(struct notifier_block *this, | |
5522 | unsigned long event, void *ptr) | |
5523 | { | |
5524 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); | |
5525 | struct nft_flowtable *flowtable; | |
5526 | struct nft_table *table; | |
3b49e2e9 PNA |
5527 | |
5528 | if (event != NETDEV_UNREGISTER) | |
5529 | return 0; | |
5530 | ||
5531 | nfnl_lock(NFNL_SUBSYS_NFTABLES); | |
36596dad PNA |
5532 | list_for_each_entry(table, &dev_net(dev)->nft.tables, list) { |
5533 | list_for_each_entry(flowtable, &table->flowtables, list) { | |
5534 | nft_flowtable_event(event, dev, flowtable); | |
3b49e2e9 PNA |
5535 | } |
5536 | } | |
5537 | nfnl_unlock(NFNL_SUBSYS_NFTABLES); | |
5538 | ||
5539 | return NOTIFY_DONE; | |
5540 | } | |
5541 | ||
5542 | static struct notifier_block nf_tables_flowtable_notifier = { | |
5543 | .notifier_call = nf_tables_flowtable_event, | |
5544 | }; | |
5545 | ||
25e94a99 PNA |
5546 | static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb, |
5547 | int event) | |
84d7fce6 PNA |
5548 | { |
5549 | struct nlmsghdr *nlh = nlmsg_hdr(skb); | |
5550 | struct sk_buff *skb2; | |
5551 | int err; | |
5552 | ||
5553 | if (nlmsg_report(nlh) && | |
5554 | !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES)) | |
25e94a99 | 5555 | return; |
84d7fce6 | 5556 | |
84d7fce6 PNA |
5557 | skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); |
5558 | if (skb2 == NULL) | |
5559 | goto err; | |
5560 | ||
5561 | err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid, | |
5562 | nlh->nlmsg_seq); | |
5563 | if (err < 0) { | |
5564 | kfree_skb(skb2); | |
5565 | goto err; | |
5566 | } | |
5567 | ||
25e94a99 PNA |
5568 | nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES, |
5569 | nlmsg_report(nlh), GFP_KERNEL); | |
5570 | return; | |
84d7fce6 | 5571 | err: |
25e94a99 PNA |
5572 | nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES, |
5573 | -ENOBUFS); | |
84d7fce6 PNA |
5574 | } |
5575 | ||
7b8002a1 PNA |
5576 | static int nf_tables_getgen(struct net *net, struct sock *nlsk, |
5577 | struct sk_buff *skb, const struct nlmsghdr *nlh, | |
04ba724b PNA |
5578 | const struct nlattr * const nla[], |
5579 | struct netlink_ext_ack *extack) | |
84d7fce6 | 5580 | { |
84d7fce6 PNA |
5581 | struct sk_buff *skb2; |
5582 | int err; | |
5583 | ||
5584 | skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
5585 | if (skb2 == NULL) | |
5586 | return -ENOMEM; | |
5587 | ||
5588 | err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid, | |
5589 | nlh->nlmsg_seq); | |
5590 | if (err < 0) | |
5591 | goto err; | |
5592 | ||
5593 | return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid); | |
5594 | err: | |
5595 | kfree_skb(skb2); | |
5596 | return err; | |
5597 | } | |
5598 | ||
96518518 PM |
5599 | static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = { |
5600 | [NFT_MSG_NEWTABLE] = { | |
55dd6f93 | 5601 | .call_batch = nf_tables_newtable, |
96518518 PM |
5602 | .attr_count = NFTA_TABLE_MAX, |
5603 | .policy = nft_table_policy, | |
5604 | }, | |
5605 | [NFT_MSG_GETTABLE] = { | |
5606 | .call = nf_tables_gettable, | |
5607 | .attr_count = NFTA_TABLE_MAX, | |
5608 | .policy = nft_table_policy, | |
5609 | }, | |
5610 | [NFT_MSG_DELTABLE] = { | |
55dd6f93 | 5611 | .call_batch = nf_tables_deltable, |
96518518 PM |
5612 | .attr_count = NFTA_TABLE_MAX, |
5613 | .policy = nft_table_policy, | |
5614 | }, | |
5615 | [NFT_MSG_NEWCHAIN] = { | |
91c7b38d | 5616 | .call_batch = nf_tables_newchain, |
96518518 PM |
5617 | .attr_count = NFTA_CHAIN_MAX, |
5618 | .policy = nft_chain_policy, | |
5619 | }, | |
5620 | [NFT_MSG_GETCHAIN] = { | |
5621 | .call = nf_tables_getchain, | |
5622 | .attr_count = NFTA_CHAIN_MAX, | |
5623 | .policy = nft_chain_policy, | |
5624 | }, | |
5625 | [NFT_MSG_DELCHAIN] = { | |
91c7b38d | 5626 | .call_batch = nf_tables_delchain, |
96518518 PM |
5627 | .attr_count = NFTA_CHAIN_MAX, |
5628 | .policy = nft_chain_policy, | |
5629 | }, | |
5630 | [NFT_MSG_NEWRULE] = { | |
0628b123 | 5631 | .call_batch = nf_tables_newrule, |
96518518 PM |
5632 | .attr_count = NFTA_RULE_MAX, |
5633 | .policy = nft_rule_policy, | |
5634 | }, | |
5635 | [NFT_MSG_GETRULE] = { | |
5636 | .call = nf_tables_getrule, | |
5637 | .attr_count = NFTA_RULE_MAX, | |
5638 | .policy = nft_rule_policy, | |
5639 | }, | |
5640 | [NFT_MSG_DELRULE] = { | |
0628b123 | 5641 | .call_batch = nf_tables_delrule, |
96518518 PM |
5642 | .attr_count = NFTA_RULE_MAX, |
5643 | .policy = nft_rule_policy, | |
5644 | }, | |
20a69341 | 5645 | [NFT_MSG_NEWSET] = { |
958bee14 | 5646 | .call_batch = nf_tables_newset, |
20a69341 PM |
5647 | .attr_count = NFTA_SET_MAX, |
5648 | .policy = nft_set_policy, | |
5649 | }, | |
5650 | [NFT_MSG_GETSET] = { | |
5651 | .call = nf_tables_getset, | |
5652 | .attr_count = NFTA_SET_MAX, | |
5653 | .policy = nft_set_policy, | |
5654 | }, | |
5655 | [NFT_MSG_DELSET] = { | |
958bee14 | 5656 | .call_batch = nf_tables_delset, |
20a69341 PM |
5657 | .attr_count = NFTA_SET_MAX, |
5658 | .policy = nft_set_policy, | |
5659 | }, | |
5660 | [NFT_MSG_NEWSETELEM] = { | |
958bee14 | 5661 | .call_batch = nf_tables_newsetelem, |
20a69341 PM |
5662 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
5663 | .policy = nft_set_elem_list_policy, | |
5664 | }, | |
5665 | [NFT_MSG_GETSETELEM] = { | |
5666 | .call = nf_tables_getsetelem, | |
5667 | .attr_count = NFTA_SET_ELEM_LIST_MAX, | |
5668 | .policy = nft_set_elem_list_policy, | |
5669 | }, | |
5670 | [NFT_MSG_DELSETELEM] = { | |
958bee14 | 5671 | .call_batch = nf_tables_delsetelem, |
20a69341 PM |
5672 | .attr_count = NFTA_SET_ELEM_LIST_MAX, |
5673 | .policy = nft_set_elem_list_policy, | |
5674 | }, | |
84d7fce6 PNA |
5675 | [NFT_MSG_GETGEN] = { |
5676 | .call = nf_tables_getgen, | |
5677 | }, | |
e5009240 PNA |
5678 | [NFT_MSG_NEWOBJ] = { |
5679 | .call_batch = nf_tables_newobj, | |
5680 | .attr_count = NFTA_OBJ_MAX, | |
5681 | .policy = nft_obj_policy, | |
5682 | }, | |
5683 | [NFT_MSG_GETOBJ] = { | |
5684 | .call = nf_tables_getobj, | |
5685 | .attr_count = NFTA_OBJ_MAX, | |
5686 | .policy = nft_obj_policy, | |
5687 | }, | |
5688 | [NFT_MSG_DELOBJ] = { | |
5689 | .call_batch = nf_tables_delobj, | |
5690 | .attr_count = NFTA_OBJ_MAX, | |
5691 | .policy = nft_obj_policy, | |
5692 | }, | |
43da04a5 PNA |
5693 | [NFT_MSG_GETOBJ_RESET] = { |
5694 | .call = nf_tables_getobj, | |
5695 | .attr_count = NFTA_OBJ_MAX, | |
5696 | .policy = nft_obj_policy, | |
5697 | }, | |
3b49e2e9 PNA |
5698 | [NFT_MSG_NEWFLOWTABLE] = { |
5699 | .call_batch = nf_tables_newflowtable, | |
5700 | .attr_count = NFTA_FLOWTABLE_MAX, | |
5701 | .policy = nft_flowtable_policy, | |
5702 | }, | |
5703 | [NFT_MSG_GETFLOWTABLE] = { | |
5704 | .call = nf_tables_getflowtable, | |
5705 | .attr_count = NFTA_FLOWTABLE_MAX, | |
5706 | .policy = nft_flowtable_policy, | |
5707 | }, | |
5708 | [NFT_MSG_DELFLOWTABLE] = { | |
5709 | .call_batch = nf_tables_delflowtable, | |
5710 | .attr_count = NFTA_FLOWTABLE_MAX, | |
5711 | .policy = nft_flowtable_policy, | |
5712 | }, | |
96518518 PM |
5713 | }; |
5714 | ||
91c7b38d PNA |
5715 | static void nft_chain_commit_update(struct nft_trans *trans) |
5716 | { | |
5717 | struct nft_base_chain *basechain; | |
5718 | ||
b7263e07 | 5719 | if (nft_trans_chain_name(trans)) |
91c7b38d PNA |
5720 | strcpy(trans->ctx.chain->name, nft_trans_chain_name(trans)); |
5721 | ||
f323d954 | 5722 | if (!nft_is_base_chain(trans->ctx.chain)) |
91c7b38d PNA |
5723 | return; |
5724 | ||
5725 | basechain = nft_base_chain(trans->ctx.chain); | |
5726 | nft_chain_stats_replace(basechain, nft_trans_chain_stats(trans)); | |
5727 | ||
5728 | switch (nft_trans_chain_policy(trans)) { | |
5729 | case NF_DROP: | |
5730 | case NF_ACCEPT: | |
5731 | basechain->policy = nft_trans_chain_policy(trans); | |
5732 | break; | |
5733 | } | |
5734 | } | |
5735 | ||
b326dd37 | 5736 | static void nf_tables_commit_release(struct nft_trans *trans) |
c7c32e72 | 5737 | { |
c7c32e72 PNA |
5738 | switch (trans->msg_type) { |
5739 | case NFT_MSG_DELTABLE: | |
5740 | nf_tables_table_destroy(&trans->ctx); | |
5741 | break; | |
5742 | case NFT_MSG_DELCHAIN: | |
43a605f2 | 5743 | nf_tables_chain_destroy(&trans->ctx); |
c7c32e72 PNA |
5744 | break; |
5745 | case NFT_MSG_DELRULE: | |
5746 | nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); | |
5747 | break; | |
5748 | case NFT_MSG_DELSET: | |
5749 | nft_set_destroy(nft_trans_set(trans)); | |
5750 | break; | |
61edafbb | 5751 | case NFT_MSG_DELSETELEM: |
59105446 PNA |
5752 | nf_tables_set_elem_destroy(nft_trans_elem_set(trans), |
5753 | nft_trans_elem(trans).priv); | |
61edafbb | 5754 | break; |
e5009240 PNA |
5755 | case NFT_MSG_DELOBJ: |
5756 | nft_obj_destroy(nft_trans_obj(trans)); | |
5757 | break; | |
3b49e2e9 PNA |
5758 | case NFT_MSG_DELFLOWTABLE: |
5759 | nf_tables_flowtable_destroy(nft_trans_flowtable(trans)); | |
5760 | break; | |
c7c32e72 PNA |
5761 | } |
5762 | kfree(trans); | |
5763 | } | |
5764 | ||
5913beaf | 5765 | static int nf_tables_commit(struct net *net, struct sk_buff *skb) |
37082f93 | 5766 | { |
37082f93 | 5767 | struct nft_trans *trans, *next; |
a3716e70 | 5768 | struct nft_trans_elem *te; |
37082f93 PNA |
5769 | |
5770 | /* Bump generation counter, invalidate any dump in progress */ | |
38e029f1 | 5771 | while (++net->nft.base_seq == 0); |
37082f93 PNA |
5772 | |
5773 | /* A new generation has just started */ | |
ea4bd995 | 5774 | net->nft.gencursor = nft_gencursor_next(net); |
37082f93 PNA |
5775 | |
5776 | /* Make sure all packets have left the previous generation before | |
5777 | * purging old rules. | |
5778 | */ | |
5779 | synchronize_rcu(); | |
5780 | ||
5781 | list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { | |
b380e5c7 | 5782 | switch (trans->msg_type) { |
55dd6f93 PNA |
5783 | case NFT_MSG_NEWTABLE: |
5784 | if (nft_trans_table_update(trans)) { | |
5785 | if (!nft_trans_table_enable(trans)) { | |
664b0f8c | 5786 | nf_tables_table_disable(net, |
55dd6f93 PNA |
5787 | trans->ctx.table); |
5788 | trans->ctx.table->flags |= NFT_TABLE_F_DORMANT; | |
5789 | } | |
5790 | } else { | |
f2a6d766 | 5791 | nft_clear(net, trans->ctx.table); |
55dd6f93 | 5792 | } |
35151d84 | 5793 | nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE); |
55dd6f93 PNA |
5794 | nft_trans_destroy(trans); |
5795 | break; | |
5796 | case NFT_MSG_DELTABLE: | |
f2a6d766 | 5797 | list_del_rcu(&trans->ctx.table->list); |
35151d84 | 5798 | nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE); |
55dd6f93 | 5799 | break; |
91c7b38d PNA |
5800 | case NFT_MSG_NEWCHAIN: |
5801 | if (nft_trans_chain_update(trans)) | |
5802 | nft_chain_commit_update(trans); | |
4fefee57 | 5803 | else |
664b0f8c | 5804 | nft_clear(net, trans->ctx.chain); |
4fefee57 | 5805 | |
35151d84 | 5806 | nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN); |
91c7b38d PNA |
5807 | nft_trans_destroy(trans); |
5808 | break; | |
5809 | case NFT_MSG_DELCHAIN: | |
664b0f8c | 5810 | list_del_rcu(&trans->ctx.chain->list); |
35151d84 | 5811 | nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN); |
c974a3a3 PNA |
5812 | nf_tables_unregister_hook(trans->ctx.net, |
5813 | trans->ctx.table, | |
5814 | trans->ctx.chain); | |
91c7b38d | 5815 | break; |
b380e5c7 | 5816 | case NFT_MSG_NEWRULE: |
889f7ee7 | 5817 | nft_clear(trans->ctx.net, nft_trans_rule(trans)); |
35151d84 | 5818 | nf_tables_rule_notify(&trans->ctx, |
37082f93 | 5819 | nft_trans_rule(trans), |
35151d84 | 5820 | NFT_MSG_NEWRULE); |
37082f93 | 5821 | nft_trans_destroy(trans); |
b380e5c7 PNA |
5822 | break; |
5823 | case NFT_MSG_DELRULE: | |
5824 | list_del_rcu(&nft_trans_rule(trans)->list); | |
35151d84 PNA |
5825 | nf_tables_rule_notify(&trans->ctx, |
5826 | nft_trans_rule(trans), | |
5827 | NFT_MSG_DELRULE); | |
b380e5c7 | 5828 | break; |
958bee14 | 5829 | case NFT_MSG_NEWSET: |
37a9cc52 | 5830 | nft_clear(net, nft_trans_set(trans)); |
4fefee57 PNA |
5831 | /* This avoids hitting -EBUSY when deleting the table |
5832 | * from the transaction. | |
5833 | */ | |
408070d6 | 5834 | if (nft_set_is_anonymous(nft_trans_set(trans)) && |
4fefee57 PNA |
5835 | !list_empty(&nft_trans_set(trans)->bindings)) |
5836 | trans->ctx.table->use--; | |
5837 | ||
958bee14 | 5838 | nf_tables_set_notify(&trans->ctx, nft_trans_set(trans), |
31f8441c | 5839 | NFT_MSG_NEWSET, GFP_KERNEL); |
958bee14 PNA |
5840 | nft_trans_destroy(trans); |
5841 | break; | |
5842 | case NFT_MSG_DELSET: | |
37a9cc52 | 5843 | list_del_rcu(&nft_trans_set(trans)->list); |
958bee14 | 5844 | nf_tables_set_notify(&trans->ctx, nft_trans_set(trans), |
31f8441c | 5845 | NFT_MSG_DELSET, GFP_KERNEL); |
958bee14 | 5846 | break; |
60319eb1 | 5847 | case NFT_MSG_NEWSETELEM: |
cc02e457 PM |
5848 | te = (struct nft_trans_elem *)trans->data; |
5849 | ||
42a55769 | 5850 | te->set->ops->activate(net, te->set, &te->elem); |
cc02e457 PM |
5851 | nf_tables_setelem_notify(&trans->ctx, te->set, |
5852 | &te->elem, | |
60319eb1 PNA |
5853 | NFT_MSG_NEWSETELEM, 0); |
5854 | nft_trans_destroy(trans); | |
5855 | break; | |
5856 | case NFT_MSG_DELSETELEM: | |
a3716e70 | 5857 | te = (struct nft_trans_elem *)trans->data; |
fe2811eb | 5858 | |
a3716e70 PNA |
5859 | nf_tables_setelem_notify(&trans->ctx, te->set, |
5860 | &te->elem, | |
60319eb1 | 5861 | NFT_MSG_DELSETELEM, 0); |
5cb82a38 | 5862 | te->set->ops->remove(net, te->set, &te->elem); |
3dd0673a PM |
5863 | atomic_dec(&te->set->nelems); |
5864 | te->set->ndeact--; | |
60319eb1 | 5865 | break; |
e5009240 PNA |
5866 | case NFT_MSG_NEWOBJ: |
5867 | nft_clear(net, nft_trans_obj(trans)); | |
5868 | nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans), | |
5869 | NFT_MSG_NEWOBJ); | |
5870 | nft_trans_destroy(trans); | |
5871 | break; | |
5872 | case NFT_MSG_DELOBJ: | |
5873 | list_del_rcu(&nft_trans_obj(trans)->list); | |
5874 | nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans), | |
5875 | NFT_MSG_DELOBJ); | |
5876 | break; | |
3b49e2e9 PNA |
5877 | case NFT_MSG_NEWFLOWTABLE: |
5878 | nft_clear(net, nft_trans_flowtable(trans)); | |
5879 | nf_tables_flowtable_notify(&trans->ctx, | |
5880 | nft_trans_flowtable(trans), | |
5881 | NFT_MSG_NEWFLOWTABLE); | |
5882 | nft_trans_destroy(trans); | |
5883 | break; | |
5884 | case NFT_MSG_DELFLOWTABLE: | |
5885 | list_del_rcu(&nft_trans_flowtable(trans)->list); | |
5886 | nf_tables_flowtable_notify(&trans->ctx, | |
5887 | nft_trans_flowtable(trans), | |
5888 | NFT_MSG_DELFLOWTABLE); | |
5889 | nft_unregister_flowtable_net_hooks(net, | |
5890 | nft_trans_flowtable(trans)); | |
5891 | break; | |
37082f93 | 5892 | } |
37082f93 PNA |
5893 | } |
5894 | ||
b326dd37 PNA |
5895 | synchronize_rcu(); |
5896 | ||
37082f93 | 5897 | list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) { |
c7c32e72 | 5898 | list_del(&trans->list); |
b326dd37 | 5899 | nf_tables_commit_release(trans); |
37082f93 | 5900 | } |
84d7fce6 PNA |
5901 | |
5902 | nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN); | |
37082f93 PNA |
5903 | |
5904 | return 0; | |
5905 | } | |
5906 | ||
b326dd37 | 5907 | static void nf_tables_abort_release(struct nft_trans *trans) |
c7c32e72 | 5908 | { |
c7c32e72 PNA |
5909 | switch (trans->msg_type) { |
5910 | case NFT_MSG_NEWTABLE: | |
5911 | nf_tables_table_destroy(&trans->ctx); | |
5912 | break; | |
5913 | case NFT_MSG_NEWCHAIN: | |
43a605f2 | 5914 | nf_tables_chain_destroy(&trans->ctx); |
c7c32e72 PNA |
5915 | break; |
5916 | case NFT_MSG_NEWRULE: | |
5917 | nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans)); | |
5918 | break; | |
5919 | case NFT_MSG_NEWSET: | |
5920 | nft_set_destroy(nft_trans_set(trans)); | |
5921 | break; | |
61edafbb PM |
5922 | case NFT_MSG_NEWSETELEM: |
5923 | nft_set_elem_destroy(nft_trans_elem_set(trans), | |
61f9e292 | 5924 | nft_trans_elem(trans).priv, true); |
61edafbb | 5925 | break; |
e5009240 PNA |
5926 | case NFT_MSG_NEWOBJ: |
5927 | nft_obj_destroy(nft_trans_obj(trans)); | |
5928 | break; | |
3b49e2e9 PNA |
5929 | case NFT_MSG_NEWFLOWTABLE: |
5930 | nf_tables_flowtable_destroy(nft_trans_flowtable(trans)); | |
5931 | break; | |
c7c32e72 PNA |
5932 | } |
5933 | kfree(trans); | |
5934 | } | |
5935 | ||
5913beaf | 5936 | static int nf_tables_abort(struct net *net, struct sk_buff *skb) |
37082f93 | 5937 | { |
37082f93 | 5938 | struct nft_trans *trans, *next; |
02263db0 | 5939 | struct nft_trans_elem *te; |
37082f93 | 5940 | |
a907e36d XL |
5941 | list_for_each_entry_safe_reverse(trans, next, &net->nft.commit_list, |
5942 | list) { | |
b380e5c7 | 5943 | switch (trans->msg_type) { |
55dd6f93 PNA |
5944 | case NFT_MSG_NEWTABLE: |
5945 | if (nft_trans_table_update(trans)) { | |
5946 | if (nft_trans_table_enable(trans)) { | |
664b0f8c | 5947 | nf_tables_table_disable(net, |
55dd6f93 PNA |
5948 | trans->ctx.table); |
5949 | trans->ctx.table->flags |= NFT_TABLE_F_DORMANT; | |
5950 | } | |
5951 | nft_trans_destroy(trans); | |
5952 | } else { | |
e688a7f8 | 5953 | list_del_rcu(&trans->ctx.table->list); |
55dd6f93 PNA |
5954 | } |
5955 | break; | |
5956 | case NFT_MSG_DELTABLE: | |
f2a6d766 | 5957 | nft_clear(trans->ctx.net, trans->ctx.table); |
55dd6f93 PNA |
5958 | nft_trans_destroy(trans); |
5959 | break; | |
91c7b38d PNA |
5960 | case NFT_MSG_NEWCHAIN: |
5961 | if (nft_trans_chain_update(trans)) { | |
982f4051 | 5962 | free_percpu(nft_trans_chain_stats(trans)); |
91c7b38d PNA |
5963 | |
5964 | nft_trans_destroy(trans); | |
5965 | } else { | |
4fefee57 | 5966 | trans->ctx.table->use--; |
e688a7f8 | 5967 | list_del_rcu(&trans->ctx.chain->list); |
c974a3a3 PNA |
5968 | nf_tables_unregister_hook(trans->ctx.net, |
5969 | trans->ctx.table, | |
5970 | trans->ctx.chain); | |
91c7b38d PNA |
5971 | } |
5972 | break; | |
5973 | case NFT_MSG_DELCHAIN: | |
4fefee57 | 5974 | trans->ctx.table->use++; |
664b0f8c | 5975 | nft_clear(trans->ctx.net, trans->ctx.chain); |
91c7b38d PNA |
5976 | nft_trans_destroy(trans); |
5977 | break; | |
b380e5c7 | 5978 | case NFT_MSG_NEWRULE: |
4fefee57 | 5979 | trans->ctx.chain->use--; |
b380e5c7 PNA |
5980 | list_del_rcu(&nft_trans_rule(trans)->list); |
5981 | break; | |
5982 | case NFT_MSG_DELRULE: | |
4fefee57 | 5983 | trans->ctx.chain->use++; |
889f7ee7 | 5984 | nft_clear(trans->ctx.net, nft_trans_rule(trans)); |
37082f93 | 5985 | nft_trans_destroy(trans); |
b380e5c7 | 5986 | break; |
958bee14 | 5987 | case NFT_MSG_NEWSET: |
4fefee57 | 5988 | trans->ctx.table->use--; |
e688a7f8 | 5989 | list_del_rcu(&nft_trans_set(trans)->list); |
958bee14 PNA |
5990 | break; |
5991 | case NFT_MSG_DELSET: | |
4fefee57 | 5992 | trans->ctx.table->use++; |
37a9cc52 | 5993 | nft_clear(trans->ctx.net, nft_trans_set(trans)); |
958bee14 PNA |
5994 | nft_trans_destroy(trans); |
5995 | break; | |
60319eb1 | 5996 | case NFT_MSG_NEWSETELEM: |
02263db0 | 5997 | te = (struct nft_trans_elem *)trans->data; |
fe2811eb | 5998 | |
5cb82a38 | 5999 | te->set->ops->remove(net, te->set, &te->elem); |
3dd0673a | 6000 | atomic_dec(&te->set->nelems); |
60319eb1 PNA |
6001 | break; |
6002 | case NFT_MSG_DELSETELEM: | |
cc02e457 PM |
6003 | te = (struct nft_trans_elem *)trans->data; |
6004 | ||
59105446 | 6005 | nft_set_elem_activate(net, te->set, &te->elem); |
42a55769 | 6006 | te->set->ops->activate(net, te->set, &te->elem); |
3dd0673a | 6007 | te->set->ndeact--; |
cc02e457 | 6008 | |
e5009240 PNA |
6009 | nft_trans_destroy(trans); |
6010 | break; | |
6011 | case NFT_MSG_NEWOBJ: | |
6012 | trans->ctx.table->use--; | |
6013 | list_del_rcu(&nft_trans_obj(trans)->list); | |
6014 | break; | |
6015 | case NFT_MSG_DELOBJ: | |
6016 | trans->ctx.table->use++; | |
6017 | nft_clear(trans->ctx.net, nft_trans_obj(trans)); | |
60319eb1 PNA |
6018 | nft_trans_destroy(trans); |
6019 | break; | |
3b49e2e9 PNA |
6020 | case NFT_MSG_NEWFLOWTABLE: |
6021 | trans->ctx.table->use--; | |
6022 | list_del_rcu(&nft_trans_flowtable(trans)->list); | |
6023 | nft_unregister_flowtable_net_hooks(net, | |
6024 | nft_trans_flowtable(trans)); | |
6025 | break; | |
6026 | case NFT_MSG_DELFLOWTABLE: | |
6027 | trans->ctx.table->use++; | |
6028 | nft_clear(trans->ctx.net, nft_trans_flowtable(trans)); | |
6029 | nft_trans_destroy(trans); | |
6030 | break; | |
37082f93 | 6031 | } |
37082f93 PNA |
6032 | } |
6033 | ||
b326dd37 PNA |
6034 | synchronize_rcu(); |
6035 | ||
a1cee076 PNA |
6036 | list_for_each_entry_safe_reverse(trans, next, |
6037 | &net->nft.commit_list, list) { | |
c7c32e72 | 6038 | list_del(&trans->list); |
b326dd37 | 6039 | nf_tables_abort_release(trans); |
37082f93 PNA |
6040 | } |
6041 | ||
6042 | return 0; | |
6043 | } | |
6044 | ||
74e8bcd2 PNA |
6045 | static bool nf_tables_valid_genid(struct net *net, u32 genid) |
6046 | { | |
6047 | return net->nft.base_seq == genid; | |
6048 | } | |
6049 | ||
96518518 PM |
6050 | static const struct nfnetlink_subsystem nf_tables_subsys = { |
6051 | .name = "nf_tables", | |
6052 | .subsys_id = NFNL_SUBSYS_NFTABLES, | |
6053 | .cb_count = NFT_MSG_MAX, | |
6054 | .cb = nf_tables_cb, | |
0628b123 PNA |
6055 | .commit = nf_tables_commit, |
6056 | .abort = nf_tables_abort, | |
74e8bcd2 | 6057 | .valid_genid = nf_tables_valid_genid, |
96518518 PM |
6058 | }; |
6059 | ||
7210e4e3 | 6060 | int nft_chain_validate_dependency(const struct nft_chain *chain, |
32537e91 | 6061 | enum nft_chain_types type) |
7210e4e3 PNA |
6062 | { |
6063 | const struct nft_base_chain *basechain; | |
6064 | ||
f323d954 | 6065 | if (nft_is_base_chain(chain)) { |
7210e4e3 PNA |
6066 | basechain = nft_base_chain(chain); |
6067 | if (basechain->type->type != type) | |
6068 | return -EOPNOTSUPP; | |
6069 | } | |
6070 | return 0; | |
6071 | } | |
6072 | EXPORT_SYMBOL_GPL(nft_chain_validate_dependency); | |
6073 | ||
75e8d06d PNA |
6074 | int nft_chain_validate_hooks(const struct nft_chain *chain, |
6075 | unsigned int hook_flags) | |
6076 | { | |
6077 | struct nft_base_chain *basechain; | |
6078 | ||
f323d954 | 6079 | if (nft_is_base_chain(chain)) { |
75e8d06d PNA |
6080 | basechain = nft_base_chain(chain); |
6081 | ||
c974a3a3 | 6082 | if ((1 << basechain->ops.hooknum) & hook_flags) |
75e8d06d PNA |
6083 | return 0; |
6084 | ||
6085 | return -EOPNOTSUPP; | |
6086 | } | |
6087 | ||
6088 | return 0; | |
6089 | } | |
6090 | EXPORT_SYMBOL_GPL(nft_chain_validate_hooks); | |
6091 | ||
20a69341 PM |
6092 | /* |
6093 | * Loop detection - walk through the ruleset beginning at the destination chain | |
6094 | * of a new jump until either the source chain is reached (loop) or all | |
6095 | * reachable chains have been traversed. | |
6096 | * | |
6097 | * The loop check is performed whenever a new jump verdict is added to an | |
6098 | * expression or verdict map or a verdict map is bound to a new chain. | |
6099 | */ | |
6100 | ||
6101 | static int nf_tables_check_loops(const struct nft_ctx *ctx, | |
6102 | const struct nft_chain *chain); | |
6103 | ||
6104 | static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx, | |
de70185d | 6105 | struct nft_set *set, |
20a69341 | 6106 | const struct nft_set_iter *iter, |
de70185d | 6107 | struct nft_set_elem *elem) |
20a69341 | 6108 | { |
fe2811eb PM |
6109 | const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); |
6110 | const struct nft_data *data; | |
6111 | ||
6112 | if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) && | |
6113 | *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END) | |
62f9c8b4 PNA |
6114 | return 0; |
6115 | ||
fe2811eb | 6116 | data = nft_set_ext_data(ext); |
1ca2e170 | 6117 | switch (data->verdict.code) { |
20a69341 PM |
6118 | case NFT_JUMP: |
6119 | case NFT_GOTO: | |
1ca2e170 | 6120 | return nf_tables_check_loops(ctx, data->verdict.chain); |
20a69341 PM |
6121 | default: |
6122 | return 0; | |
6123 | } | |
6124 | } | |
6125 | ||
6126 | static int nf_tables_check_loops(const struct nft_ctx *ctx, | |
6127 | const struct nft_chain *chain) | |
6128 | { | |
6129 | const struct nft_rule *rule; | |
6130 | const struct nft_expr *expr, *last; | |
de70185d | 6131 | struct nft_set *set; |
20a69341 PM |
6132 | struct nft_set_binding *binding; |
6133 | struct nft_set_iter iter; | |
20a69341 PM |
6134 | |
6135 | if (ctx->chain == chain) | |
6136 | return -ELOOP; | |
6137 | ||
6138 | list_for_each_entry(rule, &chain->rules, list) { | |
6139 | nft_rule_for_each_expr(expr, last, rule) { | |
0ca743a5 PNA |
6140 | const struct nft_data *data = NULL; |
6141 | int err; | |
6142 | ||
6143 | if (!expr->ops->validate) | |
20a69341 PM |
6144 | continue; |
6145 | ||
0ca743a5 PNA |
6146 | err = expr->ops->validate(ctx, expr, &data); |
6147 | if (err < 0) | |
6148 | return err; | |
6149 | ||
20a69341 | 6150 | if (data == NULL) |
0ca743a5 | 6151 | continue; |
20a69341 | 6152 | |
1ca2e170 | 6153 | switch (data->verdict.code) { |
20a69341 PM |
6154 | case NFT_JUMP: |
6155 | case NFT_GOTO: | |
1ca2e170 PM |
6156 | err = nf_tables_check_loops(ctx, |
6157 | data->verdict.chain); | |
20a69341 PM |
6158 | if (err < 0) |
6159 | return err; | |
6160 | default: | |
6161 | break; | |
6162 | } | |
6163 | } | |
6164 | } | |
6165 | ||
6166 | list_for_each_entry(set, &ctx->table->sets, list) { | |
37a9cc52 PNA |
6167 | if (!nft_is_active_next(ctx->net, set)) |
6168 | continue; | |
20a69341 PM |
6169 | if (!(set->flags & NFT_SET_MAP) || |
6170 | set->dtype != NFT_DATA_VERDICT) | |
6171 | continue; | |
6172 | ||
6173 | list_for_each_entry(binding, &set->bindings, list) { | |
11113e19 PM |
6174 | if (!(binding->flags & NFT_SET_MAP) || |
6175 | binding->chain != chain) | |
20a69341 PM |
6176 | continue; |
6177 | ||
8588ac09 | 6178 | iter.genmask = nft_genmask_next(ctx->net); |
20a69341 PM |
6179 | iter.skip = 0; |
6180 | iter.count = 0; | |
6181 | iter.err = 0; | |
6182 | iter.fn = nf_tables_loop_check_setelem; | |
6183 | ||
6184 | set->ops->walk(ctx, set, &iter); | |
6185 | if (iter.err < 0) | |
6186 | return iter.err; | |
6187 | } | |
6188 | } | |
6189 | ||
6190 | return 0; | |
6191 | } | |
6192 | ||
36b701fa LGL |
6193 | /** |
6194 | * nft_parse_u32_check - fetch u32 attribute and check for maximum value | |
6195 | * | |
6196 | * @attr: netlink attribute to fetch value from | |
6197 | * @max: maximum value to be stored in dest | |
6198 | * @dest: pointer to the variable | |
6199 | * | |
6200 | * Parse, check and store a given u32 netlink attribute into variable. | |
6201 | * This function returns -ERANGE if the value goes over maximum value. | |
6202 | * Otherwise a 0 is returned and the attribute value is stored in the | |
6203 | * destination variable. | |
6204 | */ | |
f1d505bb | 6205 | int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest) |
36b701fa | 6206 | { |
09525a09 | 6207 | u32 val; |
36b701fa LGL |
6208 | |
6209 | val = ntohl(nla_get_be32(attr)); | |
6210 | if (val > max) | |
6211 | return -ERANGE; | |
6212 | ||
6213 | *dest = val; | |
6214 | return 0; | |
6215 | } | |
6216 | EXPORT_SYMBOL_GPL(nft_parse_u32_check); | |
6217 | ||
49499c3e PM |
6218 | /** |
6219 | * nft_parse_register - parse a register value from a netlink attribute | |
6220 | * | |
6221 | * @attr: netlink attribute | |
6222 | * | |
6223 | * Parse and translate a register value from a netlink attribute. | |
6224 | * Registers used to be 128 bit wide, these register numbers will be | |
6225 | * mapped to the corresponding 32 bit register numbers. | |
6226 | */ | |
b1c96ed3 PM |
6227 | unsigned int nft_parse_register(const struct nlattr *attr) |
6228 | { | |
49499c3e PM |
6229 | unsigned int reg; |
6230 | ||
6231 | reg = ntohl(nla_get_be32(attr)); | |
6232 | switch (reg) { | |
6233 | case NFT_REG_VERDICT...NFT_REG_4: | |
6234 | return reg * NFT_REG_SIZE / NFT_REG32_SIZE; | |
6235 | default: | |
6236 | return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00; | |
6237 | } | |
b1c96ed3 PM |
6238 | } |
6239 | EXPORT_SYMBOL_GPL(nft_parse_register); | |
6240 | ||
49499c3e PM |
6241 | /** |
6242 | * nft_dump_register - dump a register value to a netlink attribute | |
6243 | * | |
6244 | * @skb: socket buffer | |
6245 | * @attr: attribute number | |
6246 | * @reg: register number | |
6247 | * | |
6248 | * Construct a netlink attribute containing the register number. For | |
6249 | * compatibility reasons, register numbers being a multiple of 4 are | |
6250 | * translated to the corresponding 128 bit register numbers. | |
6251 | */ | |
b1c96ed3 PM |
6252 | int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg) |
6253 | { | |
49499c3e PM |
6254 | if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0) |
6255 | reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE); | |
6256 | else | |
6257 | reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00; | |
6258 | ||
b1c96ed3 PM |
6259 | return nla_put_be32(skb, attr, htonl(reg)); |
6260 | } | |
6261 | EXPORT_SYMBOL_GPL(nft_dump_register); | |
6262 | ||
96518518 | 6263 | /** |
d07db988 | 6264 | * nft_validate_register_load - validate a load from a register |
96518518 PM |
6265 | * |
6266 | * @reg: the register number | |
d07db988 | 6267 | * @len: the length of the data |
96518518 PM |
6268 | * |
6269 | * Validate that the input register is one of the general purpose | |
d07db988 | 6270 | * registers and that the length of the load is within the bounds. |
96518518 | 6271 | */ |
d07db988 | 6272 | int nft_validate_register_load(enum nft_registers reg, unsigned int len) |
96518518 | 6273 | { |
49499c3e | 6274 | if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE) |
96518518 | 6275 | return -EINVAL; |
d07db988 PM |
6276 | if (len == 0) |
6277 | return -EINVAL; | |
49499c3e | 6278 | if (reg * NFT_REG32_SIZE + len > FIELD_SIZEOF(struct nft_regs, data)) |
d07db988 | 6279 | return -ERANGE; |
49499c3e | 6280 | |
96518518 PM |
6281 | return 0; |
6282 | } | |
d07db988 | 6283 | EXPORT_SYMBOL_GPL(nft_validate_register_load); |
96518518 | 6284 | |
96518518 | 6285 | /** |
1ec10212 | 6286 | * nft_validate_register_store - validate an expressions' register store |
96518518 PM |
6287 | * |
6288 | * @ctx: context of the expression performing the load | |
6289 | * @reg: the destination register number | |
6290 | * @data: the data to load | |
6291 | * @type: the data type | |
45d9bcda | 6292 | * @len: the length of the data |
96518518 PM |
6293 | * |
6294 | * Validate that a data load uses the appropriate data type for | |
45d9bcda PM |
6295 | * the destination register and the length is within the bounds. |
6296 | * A value of NULL for the data means that its runtime gathered | |
58f40ab6 | 6297 | * data. |
96518518 | 6298 | */ |
1ec10212 PM |
6299 | int nft_validate_register_store(const struct nft_ctx *ctx, |
6300 | enum nft_registers reg, | |
6301 | const struct nft_data *data, | |
6302 | enum nft_data_types type, unsigned int len) | |
96518518 | 6303 | { |
20a69341 PM |
6304 | int err; |
6305 | ||
96518518 PM |
6306 | switch (reg) { |
6307 | case NFT_REG_VERDICT: | |
58f40ab6 | 6308 | if (type != NFT_DATA_VERDICT) |
96518518 | 6309 | return -EINVAL; |
20a69341 | 6310 | |
58f40ab6 | 6311 | if (data != NULL && |
1ca2e170 PM |
6312 | (data->verdict.code == NFT_GOTO || |
6313 | data->verdict.code == NFT_JUMP)) { | |
6314 | err = nf_tables_check_loops(ctx, data->verdict.chain); | |
20a69341 PM |
6315 | if (err < 0) |
6316 | return err; | |
6317 | ||
1ca2e170 PM |
6318 | if (ctx->chain->level + 1 > |
6319 | data->verdict.chain->level) { | |
20a69341 PM |
6320 | if (ctx->chain->level + 1 == NFT_JUMP_STACK_SIZE) |
6321 | return -EMLINK; | |
1ca2e170 | 6322 | data->verdict.chain->level = ctx->chain->level + 1; |
20a69341 PM |
6323 | } |
6324 | } | |
6325 | ||
96518518 PM |
6326 | return 0; |
6327 | default: | |
49499c3e | 6328 | if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE) |
27e6d201 | 6329 | return -EINVAL; |
45d9bcda PM |
6330 | if (len == 0) |
6331 | return -EINVAL; | |
49499c3e PM |
6332 | if (reg * NFT_REG32_SIZE + len > |
6333 | FIELD_SIZEOF(struct nft_regs, data)) | |
45d9bcda | 6334 | return -ERANGE; |
27e6d201 | 6335 | |
96518518 PM |
6336 | if (data != NULL && type != NFT_DATA_VALUE) |
6337 | return -EINVAL; | |
6338 | return 0; | |
6339 | } | |
6340 | } | |
1ec10212 | 6341 | EXPORT_SYMBOL_GPL(nft_validate_register_store); |
96518518 PM |
6342 | |
6343 | static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = { | |
6344 | [NFTA_VERDICT_CODE] = { .type = NLA_U32 }, | |
6345 | [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING, | |
6346 | .len = NFT_CHAIN_MAXNAMELEN - 1 }, | |
6347 | }; | |
6348 | ||
6349 | static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data, | |
6350 | struct nft_data_desc *desc, const struct nlattr *nla) | |
6351 | { | |
664b0f8c | 6352 | u8 genmask = nft_genmask_next(ctx->net); |
96518518 PM |
6353 | struct nlattr *tb[NFTA_VERDICT_MAX + 1]; |
6354 | struct nft_chain *chain; | |
6355 | int err; | |
6356 | ||
fceb6435 JB |
6357 | err = nla_parse_nested(tb, NFTA_VERDICT_MAX, nla, nft_verdict_policy, |
6358 | NULL); | |
96518518 PM |
6359 | if (err < 0) |
6360 | return err; | |
6361 | ||
6362 | if (!tb[NFTA_VERDICT_CODE]) | |
6363 | return -EINVAL; | |
1ca2e170 | 6364 | data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE])); |
96518518 | 6365 | |
1ca2e170 | 6366 | switch (data->verdict.code) { |
e0abdadc | 6367 | default: |
1ca2e170 | 6368 | switch (data->verdict.code & NF_VERDICT_MASK) { |
e0abdadc PM |
6369 | case NF_ACCEPT: |
6370 | case NF_DROP: | |
6371 | case NF_QUEUE: | |
6372 | break; | |
6373 | default: | |
6374 | return -EINVAL; | |
6375 | } | |
6376 | /* fall through */ | |
96518518 PM |
6377 | case NFT_CONTINUE: |
6378 | case NFT_BREAK: | |
6379 | case NFT_RETURN: | |
96518518 PM |
6380 | break; |
6381 | case NFT_JUMP: | |
6382 | case NFT_GOTO: | |
6383 | if (!tb[NFTA_VERDICT_CHAIN]) | |
6384 | return -EINVAL; | |
6385 | chain = nf_tables_chain_lookup(ctx->table, | |
664b0f8c | 6386 | tb[NFTA_VERDICT_CHAIN], genmask); |
96518518 PM |
6387 | if (IS_ERR(chain)) |
6388 | return PTR_ERR(chain); | |
f323d954 | 6389 | if (nft_is_base_chain(chain)) |
96518518 PM |
6390 | return -EOPNOTSUPP; |
6391 | ||
96518518 | 6392 | chain->use++; |
1ca2e170 | 6393 | data->verdict.chain = chain; |
96518518 | 6394 | break; |
96518518 PM |
6395 | } |
6396 | ||
4c4ed074 | 6397 | desc->len = sizeof(data->verdict); |
96518518 PM |
6398 | desc->type = NFT_DATA_VERDICT; |
6399 | return 0; | |
6400 | } | |
6401 | ||
6402 | static void nft_verdict_uninit(const struct nft_data *data) | |
6403 | { | |
1ca2e170 | 6404 | switch (data->verdict.code) { |
96518518 PM |
6405 | case NFT_JUMP: |
6406 | case NFT_GOTO: | |
1ca2e170 | 6407 | data->verdict.chain->use--; |
96518518 PM |
6408 | break; |
6409 | } | |
6410 | } | |
6411 | ||
33d5a7b1 | 6412 | int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v) |
96518518 PM |
6413 | { |
6414 | struct nlattr *nest; | |
6415 | ||
33d5a7b1 | 6416 | nest = nla_nest_start(skb, type); |
96518518 PM |
6417 | if (!nest) |
6418 | goto nla_put_failure; | |
6419 | ||
33d5a7b1 | 6420 | if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code))) |
96518518 PM |
6421 | goto nla_put_failure; |
6422 | ||
33d5a7b1 | 6423 | switch (v->code) { |
96518518 PM |
6424 | case NFT_JUMP: |
6425 | case NFT_GOTO: | |
1ca2e170 | 6426 | if (nla_put_string(skb, NFTA_VERDICT_CHAIN, |
33d5a7b1 | 6427 | v->chain->name)) |
96518518 PM |
6428 | goto nla_put_failure; |
6429 | } | |
6430 | nla_nest_end(skb, nest); | |
6431 | return 0; | |
6432 | ||
6433 | nla_put_failure: | |
6434 | return -1; | |
6435 | } | |
6436 | ||
d0a11fc3 PM |
6437 | static int nft_value_init(const struct nft_ctx *ctx, |
6438 | struct nft_data *data, unsigned int size, | |
96518518 PM |
6439 | struct nft_data_desc *desc, const struct nlattr *nla) |
6440 | { | |
6441 | unsigned int len; | |
6442 | ||
6443 | len = nla_len(nla); | |
6444 | if (len == 0) | |
6445 | return -EINVAL; | |
d0a11fc3 | 6446 | if (len > size) |
96518518 PM |
6447 | return -EOVERFLOW; |
6448 | ||
d0a11fc3 | 6449 | nla_memcpy(data->data, nla, len); |
96518518 PM |
6450 | desc->type = NFT_DATA_VALUE; |
6451 | desc->len = len; | |
6452 | return 0; | |
6453 | } | |
6454 | ||
6455 | static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data, | |
6456 | unsigned int len) | |
6457 | { | |
6458 | return nla_put(skb, NFTA_DATA_VALUE, len, data->data); | |
6459 | } | |
6460 | ||
6461 | static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = { | |
d0a11fc3 | 6462 | [NFTA_DATA_VALUE] = { .type = NLA_BINARY }, |
96518518 PM |
6463 | [NFTA_DATA_VERDICT] = { .type = NLA_NESTED }, |
6464 | }; | |
6465 | ||
6466 | /** | |
6467 | * nft_data_init - parse nf_tables data netlink attributes | |
6468 | * | |
6469 | * @ctx: context of the expression using the data | |
6470 | * @data: destination struct nft_data | |
d0a11fc3 | 6471 | * @size: maximum data length |
96518518 PM |
6472 | * @desc: data description |
6473 | * @nla: netlink attribute containing data | |
6474 | * | |
6475 | * Parse the netlink data attributes and initialize a struct nft_data. | |
6476 | * The type and length of data are returned in the data description. | |
6477 | * | |
6478 | * The caller can indicate that it only wants to accept data of type | |
6479 | * NFT_DATA_VALUE by passing NULL for the ctx argument. | |
6480 | */ | |
d0a11fc3 PM |
6481 | int nft_data_init(const struct nft_ctx *ctx, |
6482 | struct nft_data *data, unsigned int size, | |
96518518 PM |
6483 | struct nft_data_desc *desc, const struct nlattr *nla) |
6484 | { | |
6485 | struct nlattr *tb[NFTA_DATA_MAX + 1]; | |
6486 | int err; | |
6487 | ||
fceb6435 | 6488 | err = nla_parse_nested(tb, NFTA_DATA_MAX, nla, nft_data_policy, NULL); |
96518518 PM |
6489 | if (err < 0) |
6490 | return err; | |
6491 | ||
6492 | if (tb[NFTA_DATA_VALUE]) | |
d0a11fc3 PM |
6493 | return nft_value_init(ctx, data, size, desc, |
6494 | tb[NFTA_DATA_VALUE]); | |
96518518 PM |
6495 | if (tb[NFTA_DATA_VERDICT] && ctx != NULL) |
6496 | return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]); | |
6497 | return -EINVAL; | |
6498 | } | |
6499 | EXPORT_SYMBOL_GPL(nft_data_init); | |
6500 | ||
6501 | /** | |
59105446 | 6502 | * nft_data_release - release a nft_data item |
96518518 PM |
6503 | * |
6504 | * @data: struct nft_data to release | |
6505 | * @type: type of data | |
6506 | * | |
6507 | * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded, | |
6508 | * all others need to be released by calling this function. | |
6509 | */ | |
59105446 | 6510 | void nft_data_release(const struct nft_data *data, enum nft_data_types type) |
96518518 | 6511 | { |
960bd2c2 | 6512 | if (type < NFT_DATA_VERDICT) |
96518518 | 6513 | return; |
960bd2c2 | 6514 | switch (type) { |
96518518 PM |
6515 | case NFT_DATA_VERDICT: |
6516 | return nft_verdict_uninit(data); | |
6517 | default: | |
6518 | WARN_ON(1); | |
6519 | } | |
6520 | } | |
59105446 | 6521 | EXPORT_SYMBOL_GPL(nft_data_release); |
96518518 PM |
6522 | |
6523 | int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, | |
6524 | enum nft_data_types type, unsigned int len) | |
6525 | { | |
6526 | struct nlattr *nest; | |
6527 | int err; | |
6528 | ||
6529 | nest = nla_nest_start(skb, attr); | |
6530 | if (nest == NULL) | |
6531 | return -1; | |
6532 | ||
6533 | switch (type) { | |
6534 | case NFT_DATA_VALUE: | |
6535 | err = nft_value_dump(skb, data, len); | |
6536 | break; | |
6537 | case NFT_DATA_VERDICT: | |
33d5a7b1 | 6538 | err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict); |
96518518 PM |
6539 | break; |
6540 | default: | |
6541 | err = -EINVAL; | |
6542 | WARN_ON(1); | |
6543 | } | |
6544 | ||
6545 | nla_nest_end(skb, nest); | |
6546 | return err; | |
6547 | } | |
6548 | EXPORT_SYMBOL_GPL(nft_data_dump); | |
6549 | ||
5ebe0b0e PNA |
6550 | int __nft_release_basechain(struct nft_ctx *ctx) |
6551 | { | |
6552 | struct nft_rule *rule, *nr; | |
6553 | ||
f323d954 | 6554 | BUG_ON(!nft_is_base_chain(ctx->chain)); |
5ebe0b0e | 6555 | |
c974a3a3 | 6556 | nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain); |
5ebe0b0e PNA |
6557 | list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) { |
6558 | list_del(&rule->list); | |
6559 | ctx->chain->use--; | |
6560 | nf_tables_rule_destroy(ctx, rule); | |
6561 | } | |
6562 | list_del(&ctx->chain->list); | |
6563 | ctx->table->use--; | |
43a605f2 | 6564 | nf_tables_chain_destroy(ctx); |
5ebe0b0e PNA |
6565 | |
6566 | return 0; | |
6567 | } | |
6568 | EXPORT_SYMBOL_GPL(__nft_release_basechain); | |
6569 | ||
98319cb9 | 6570 | static void __nft_release_tables(struct net *net) |
df05ef87 | 6571 | { |
3b49e2e9 | 6572 | struct nft_flowtable *flowtable, *nf; |
df05ef87 PNA |
6573 | struct nft_table *table, *nt; |
6574 | struct nft_chain *chain, *nc; | |
e5009240 | 6575 | struct nft_object *obj, *ne; |
df05ef87 PNA |
6576 | struct nft_rule *rule, *nr; |
6577 | struct nft_set *set, *ns; | |
6578 | struct nft_ctx ctx = { | |
6579 | .net = net, | |
43a605f2 | 6580 | .family = NFPROTO_NETDEV, |
df05ef87 PNA |
6581 | }; |
6582 | ||
36596dad | 6583 | list_for_each_entry_safe(table, nt, &net->nft.tables, list) { |
98319cb9 | 6584 | ctx.family = table->family; |
dd4cbef7 | 6585 | |
df05ef87 | 6586 | list_for_each_entry(chain, &table->chains, list) |
c974a3a3 | 6587 | nf_tables_unregister_hook(net, table, chain); |
3b49e2e9 PNA |
6588 | list_for_each_entry(flowtable, &table->flowtables, list) |
6589 | nf_unregister_net_hooks(net, flowtable->ops, | |
6590 | flowtable->ops_len); | |
df05ef87 PNA |
6591 | /* No packets are walking on these chains anymore. */ |
6592 | ctx.table = table; | |
6593 | list_for_each_entry(chain, &table->chains, list) { | |
6594 | ctx.chain = chain; | |
6595 | list_for_each_entry_safe(rule, nr, &chain->rules, list) { | |
6596 | list_del(&rule->list); | |
6597 | chain->use--; | |
6598 | nf_tables_rule_destroy(&ctx, rule); | |
6599 | } | |
6600 | } | |
3b49e2e9 PNA |
6601 | list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) { |
6602 | list_del(&flowtable->list); | |
6603 | table->use--; | |
6604 | nf_tables_flowtable_destroy(flowtable); | |
6605 | } | |
df05ef87 PNA |
6606 | list_for_each_entry_safe(set, ns, &table->sets, list) { |
6607 | list_del(&set->list); | |
6608 | table->use--; | |
6609 | nft_set_destroy(set); | |
6610 | } | |
e5009240 PNA |
6611 | list_for_each_entry_safe(obj, ne, &table->objects, list) { |
6612 | list_del(&obj->list); | |
6613 | table->use--; | |
6614 | nft_obj_destroy(obj); | |
6615 | } | |
df05ef87 | 6616 | list_for_each_entry_safe(chain, nc, &table->chains, list) { |
43a605f2 | 6617 | ctx.chain = chain; |
df05ef87 PNA |
6618 | list_del(&chain->list); |
6619 | table->use--; | |
43a605f2 | 6620 | nf_tables_chain_destroy(&ctx); |
df05ef87 PNA |
6621 | } |
6622 | list_del(&table->list); | |
6623 | nf_tables_table_destroy(&ctx); | |
6624 | } | |
6625 | } | |
6626 | ||
dd4cbef7 PNA |
6627 | static int __net_init nf_tables_init_net(struct net *net) |
6628 | { | |
6629 | INIT_LIST_HEAD(&net->nft.tables); | |
6630 | INIT_LIST_HEAD(&net->nft.commit_list); | |
6631 | net->nft.base_seq = 1; | |
6632 | return 0; | |
6633 | } | |
6634 | ||
6635 | static void __net_exit nf_tables_exit_net(struct net *net) | |
6636 | { | |
98319cb9 | 6637 | __nft_release_tables(net); |
dd4cbef7 PNA |
6638 | WARN_ON_ONCE(!list_empty(&net->nft.tables)); |
6639 | WARN_ON_ONCE(!list_empty(&net->nft.commit_list)); | |
6640 | } | |
6641 | ||
99633ab2 PNA |
6642 | static struct pernet_operations nf_tables_net_ops = { |
6643 | .init = nf_tables_init_net, | |
613d0776 | 6644 | .exit = nf_tables_exit_net, |
99633ab2 PNA |
6645 | }; |
6646 | ||
96518518 PM |
6647 | static int __init nf_tables_module_init(void) |
6648 | { | |
6649 | int err; | |
6650 | ||
02c7b25e PNA |
6651 | nft_chain_filter_init(); |
6652 | ||
96518518 PM |
6653 | info = kmalloc(sizeof(struct nft_expr_info) * NFT_RULE_MAXEXPRS, |
6654 | GFP_KERNEL); | |
6655 | if (info == NULL) { | |
6656 | err = -ENOMEM; | |
6657 | goto err1; | |
6658 | } | |
6659 | ||
6660 | err = nf_tables_core_module_init(); | |
6661 | if (err < 0) | |
6662 | goto err2; | |
6663 | ||
6664 | err = nfnetlink_subsys_register(&nf_tables_subsys); | |
6665 | if (err < 0) | |
6666 | goto err3; | |
6667 | ||
3b49e2e9 PNA |
6668 | register_netdevice_notifier(&nf_tables_flowtable_notifier); |
6669 | ||
99633ab2 | 6670 | return register_pernet_subsys(&nf_tables_net_ops); |
96518518 PM |
6671 | err3: |
6672 | nf_tables_core_module_exit(); | |
6673 | err2: | |
6674 | kfree(info); | |
6675 | err1: | |
6676 | return err; | |
6677 | } | |
6678 | ||
6679 | static void __exit nf_tables_module_exit(void) | |
6680 | { | |
99633ab2 | 6681 | unregister_pernet_subsys(&nf_tables_net_ops); |
96518518 | 6682 | nfnetlink_subsys_unregister(&nf_tables_subsys); |
3b49e2e9 | 6683 | unregister_netdevice_notifier(&nf_tables_flowtable_notifier); |
1b1bc49c | 6684 | rcu_barrier(); |
96518518 PM |
6685 | nf_tables_core_module_exit(); |
6686 | kfree(info); | |
02c7b25e | 6687 | nft_chain_filter_fini(); |
96518518 PM |
6688 | } |
6689 | ||
6690 | module_init(nf_tables_module_init); | |
6691 | module_exit(nf_tables_module_exit); | |
6692 | ||
6693 | MODULE_LICENSE("GPL"); | |
6694 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
6695 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES); |