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Merge branch ' bpf fix for unconnect af_unix socket'
[linux.git] / net / netfilter / nf_tables_api.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
96518518 2/*
20a69341 3 * Copyright (c) 2007-2009 Patrick McHardy <[email protected]>
96518518 4 *
96518518
PM		 5 * Development of this code funded by Astaro AG (http://www.astaro.com/)
6 */
7
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/list.h>
11#include <linux/skbuff.h>
12#include <linux/netlink.h>
1ff75a3e 13#include <linux/vmalloc.h>
0eb71a9d 14#include <linux/rhashtable.h>
8e6cf365 15#include <linux/audit.h>
96518518
PM		 16#include <linux/netfilter.h>
17#include <linux/netfilter/nfnetlink.h>
18#include <linux/netfilter/nf_tables.h>
3b49e2e9 19#include <net/netfilter/nf_flow_table.h>
96518518
PM		 20#include <net/netfilter/nf_tables_core.h>
21#include <net/netfilter/nf_tables.h>
c9626a2c 22#include <net/netfilter/nf_tables_offload.h>
99633ab2 23#include <net/net_namespace.h>
96518518
PM		 24#include <net/sock.h>
25
9332d27d
FW		 26#define NFT_MODULE_AUTOLOAD_LIMIT (MODULE_NAME_LEN - sizeof("nft-expr-255-"))
27
0854db2a
FW		 28unsigned int nf_tables_net_id __read_mostly;
29
96518518 30static LIST_HEAD(nf_tables_expressions);
e5009240 31static LIST_HEAD(nf_tables_objects);
3b49e2e9 32static LIST_HEAD(nf_tables_flowtables);
0935d558 33static LIST_HEAD(nf_tables_destroy_list);
5f68718b 34static LIST_HEAD(nf_tables_gc_list);
0935d558 35static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
5f68718b 36static DEFINE_SPINLOCK(nf_tables_gc_list_lock);
96518518 37
a654de8f
PNA		 38enum {
39 NFT_VALIDATE_SKIP = 0,
40 NFT_VALIDATE_NEED,
41 NFT_VALIDATE_DO,
42};
43
4d44175a
FW		 44static struct rhltable nft_objname_ht;
45
1b2470e5
FW		 46static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
47static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
48static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
49
4d44175a
FW		 50static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
51static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
52static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
53
1b2470e5
FW		 54static const struct rhashtable_params nft_chain_ht_params = {
55 .head_offset = offsetof(struct nft_chain, rhlhead),
56 .key_offset = offsetof(struct nft_chain, name),
57 .hashfn = nft_chain_hash,
58 .obj_hashfn = nft_chain_hash_obj,
59 .obj_cmpfn = nft_chain_hash_cmp,
1b2470e5
FW		 60 .automatic_shrinking = true,
61};
62
4d44175a
FW		 63static const struct rhashtable_params nft_objname_ht_params = {
64 .head_offset = offsetof(struct nft_object, rhlhead),
65 .key_offset = offsetof(struct nft_object, key),
66 .hashfn = nft_objname_hash,
67 .obj_hashfn = nft_objname_hash_obj,
68 .obj_cmpfn = nft_objname_hash_cmp,
69 .automatic_shrinking = true,
70};
71
c520292f
RGB		 72struct nft_audit_data {
73 struct nft_table *table;
74 int entries;
75 int op;
76 struct list_head list;
77};
78
79static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
80 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
81 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
82 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
83 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
84 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
85 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
86 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
87 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
88 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
89 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
90 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
91 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
92 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
93 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
94 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
95 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
96 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
97 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
99 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
100 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
101 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
102 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
103 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
104 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
7e9be112 105 [NFT_MSG_GETSETELEM_RESET] = AUDIT_NFT_OP_SETELEM_RESET,
c520292f
RGB		 106};
107
00c320f9 108static void nft_validate_state_update(struct nft_table *table, u8 new_validate_state)
a654de8f 109{
00c320f9 110 switch (table->validate_state) {
a654de8f
PNA		 111 case NFT_VALIDATE_SKIP:
112 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
113 break;
114 case NFT_VALIDATE_NEED:
115 break;
116 case NFT_VALIDATE_DO:
117 if (new_validate_state == NFT_VALIDATE_NEED)
118 return;
119 }
120
00c320f9 121 table->validate_state = new_validate_state;
a654de8f 122}
0935d558
FW		 123static void nf_tables_trans_destroy_work(struct work_struct *w);
124static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
a654de8f 125
5f68718b
PNA		 126static void nft_trans_gc_work(struct work_struct *work);
127static DECLARE_WORK(trans_gc_work, nft_trans_gc_work);
128
7c95f6d8 129static void nft_ctx_init(struct nft_ctx *ctx,
633c9a84 130 struct net *net,
7c95f6d8
PNA		 131 const struct sk_buff *skb,
132 const struct nlmsghdr *nlh,
36596dad 133 u8 family,
7c95f6d8
PNA		 134 struct nft_table *table,
135 struct nft_chain *chain,
136 const struct nlattr * const *nla)
137{
633c9a84 138 ctx->net = net;
36596dad 139 ctx->family = family;
26b2f552 140 ctx->level = 0;
128ad332
PNA		 141 ctx->table = table;
142 ctx->chain = chain;
143 ctx->nla = nla;
144 ctx->portid = NETLINK_CB(skb).portid;
145 ctx->report = nlmsg_report(nlh);
c9626a2c 146 ctx->flags = nlh->nlmsg_flags;
128ad332 147 ctx->seq = nlh->nlmsg_seq;
7c95f6d8
PNA		 148}
149
8411b644
PNA		 150static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
151 int msg_type, u32 size, gfp_t gfp)
1081d11b
PNA		 152{
153 struct nft_trans *trans;
154
8411b644 155 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
1081d11b
PNA		 156 if (trans == NULL)
157 return NULL;
158
58007785 159 INIT_LIST_HEAD(&trans->list);
938154b9 160 INIT_LIST_HEAD(&trans->binding_list);
b380e5c7 161 trans->msg_type = msg_type;
1081d11b
PNA		 162 trans->ctx = *ctx;
163
164 return trans;
165}
166
8411b644
PNA		 167static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
168 int msg_type, u32 size)
169{
170 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
171}
172
938154b9 173static void nft_trans_list_del(struct nft_trans *trans)
1081d11b
PNA		 174{
175 list_del(&trans->list);
938154b9
PNA		 176 list_del(&trans->binding_list);
177}
178
179static void nft_trans_destroy(struct nft_trans *trans)
180{
181 nft_trans_list_del(trans);
1081d11b
PNA		 182 kfree(trans);
183}
184
26b5a571
PNA		 185static void __nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set,
186 bool bind)
f6ac8585 187{
0854db2a 188 struct nftables_pernet *nft_net;
f6ac8585
PNA		 189 struct net *net = ctx->net;
190 struct nft_trans *trans;
191
192 if (!nft_set_is_anonymous(set))
193 return;
194
d59d2f82 195 nft_net = nft_pernet(net);
0854db2a 196 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
6a0a8d10
PNA		 197 switch (trans->msg_type) {
198 case NFT_MSG_NEWSET:
199 if (nft_trans_set(trans) == set)
26b5a571 200 nft_trans_set_bound(trans) = bind;
6a0a8d10
PNA		 201 break;
202 case NFT_MSG_NEWSETELEM:
203 if (nft_trans_elem_set(trans) == set)
26b5a571 204 nft_trans_elem_set_bound(trans) = bind;
f6ac8585
PNA		 205 break;
206 }
207 }
208}
209
26b5a571
PNA		 210static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
211{
212 return __nft_set_trans_bind(ctx, set, true);
213}
214
215static void nft_set_trans_unbind(const struct nft_ctx *ctx, struct nft_set *set)
216{
217 return __nft_set_trans_bind(ctx, set, false);
218}
219
220static void __nft_chain_trans_bind(const struct nft_ctx *ctx,
221 struct nft_chain *chain, bool bind)
4bedf9ee
PNA		 222{
223 struct nftables_pernet *nft_net;
224 struct net *net = ctx->net;
225 struct nft_trans *trans;
226
227 if (!nft_chain_binding(chain))
228 return;
229
230 nft_net = nft_pernet(net);
231 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
232 switch (trans->msg_type) {
233 case NFT_MSG_NEWCHAIN:
234 if (nft_trans_chain(trans) == chain)
26b5a571 235 nft_trans_chain_bound(trans) = bind;
4bedf9ee
PNA		 236 break;
237 case NFT_MSG_NEWRULE:
238 if (trans->ctx.chain == chain)
26b5a571 239 nft_trans_rule_bound(trans) = bind;
4bedf9ee
PNA		 240 break;
241 }
242 }
243}
244
26b5a571
PNA		 245static void nft_chain_trans_bind(const struct nft_ctx *ctx,
246 struct nft_chain *chain)
247{
248 __nft_chain_trans_bind(ctx, chain, true);
249}
250
4bedf9ee
PNA		 251int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
252{
253 if (!nft_chain_binding(chain))
254 return 0;
255
256 if (nft_chain_binding(ctx->chain))
257 return -EOPNOTSUPP;
258
259 if (chain->bound)
260 return -EBUSY;
261
1689f259
PNA		 262 if (!nft_use_inc(&chain->use))
263 return -EMFILE;
264
4bedf9ee 265 chain->bound = true;
4bedf9ee
PNA		 266 nft_chain_trans_bind(ctx, chain);
267
268 return 0;
269}
270
26b5a571
PNA		 271void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
272{
273 __nft_chain_trans_bind(ctx, chain, false);
274}
275
d54725cd
PNA		 276static int nft_netdev_register_hooks(struct net *net,
277 struct list_head *hook_list)
278{
279 struct nft_hook *hook;
280 int err, j;
281
282 j = 0;
283 list_for_each_entry(hook, hook_list, list) {
284 err = nf_register_net_hook(net, &hook->ops);
285 if (err < 0)
286 goto err_register;
287
288 j++;
289 }
290 return 0;
291
292err_register:
293 list_for_each_entry(hook, hook_list, list) {
294 if (j-- <= 0)
295 break;
296
297 nf_unregister_net_hook(net, &hook->ops);
298 }
299 return err;
300}
301
302static void nft_netdev_unregister_hooks(struct net *net,
f9a43007
PNA		 303 struct list_head *hook_list,
304 bool release_netdev)
d54725cd 305{
f9a43007 306 struct nft_hook *hook, *next;
d54725cd 307
f9a43007 308 list_for_each_entry_safe(hook, next, hook_list, list) {
d54725cd 309 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 310 if (release_netdev) {
311 list_del(&hook->list);
312 kfree_rcu(hook, rcu);
313 }
314 }
d54725cd
PNA		 315}
316
c974a3a3
PNA		 317static int nf_tables_register_hook(struct net *net,
318 const struct nft_table *table,
319 struct nft_chain *chain)
d8ee8f7c 320{
d54725cd 321 struct nft_base_chain *basechain;
a37061a6 322 const struct nf_hook_ops *ops;
ae6153b5 323
d8ee8f7c 324 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 325 !nft_is_base_chain(chain))
d8ee8f7c
PNA		 326 return 0;
327
4e25ceb8
FW		 328 basechain = nft_base_chain(chain);
329 ops = &basechain->ops;
ae6153b5 330
4e25ceb8
FW		 331 if (basechain->type->ops_register)
332 return basechain->type->ops_register(net, ops);
333
d3519cb8 334 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
1e9451cb
FW		 335 return nft_netdev_register_hooks(net, &basechain->hook_list);
336
337 return nf_register_net_hook(net, &basechain->ops);
d8ee8f7c
PNA		 338}
339
f9a43007
PNA		 340static void __nf_tables_unregister_hook(struct net *net,
341 const struct nft_table *table,
342 struct nft_chain *chain,
343 bool release_netdev)
c5598794 344{
d54725cd 345 struct nft_base_chain *basechain;
4e25ceb8
FW		 346 const struct nf_hook_ops *ops;
347
d8ee8f7c 348 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 349 !nft_is_base_chain(chain))
d8ee8f7c 350 return;
4e25ceb8
FW		 351 basechain = nft_base_chain(chain);
352 ops = &basechain->ops;
d8ee8f7c 353
4e25ceb8
FW		 354 if (basechain->type->ops_unregister)
355 return basechain->type->ops_unregister(net, ops);
356
d3519cb8 357 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
f9a43007
PNA		 358 nft_netdev_unregister_hooks(net, &basechain->hook_list,
359 release_netdev);
1e9451cb
FW		 360 else
361 nf_unregister_net_hook(net, &basechain->ops);
c5598794
AB		 362}
363
f9a43007
PNA		 364static void nf_tables_unregister_hook(struct net *net,
365 const struct nft_table *table,
366 struct nft_chain *chain)
367{
368 return __nf_tables_unregister_hook(net, table, chain, false);
369}
370
0854db2a
FW		 371static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
372{
d59d2f82 373 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a 374
938154b9
PNA		 375 switch (trans->msg_type) {
376 case NFT_MSG_NEWSET:
377 if (!nft_trans_set_update(trans) &&
378 nft_set_is_anonymous(nft_trans_set(trans)))
379 list_add_tail(&trans->binding_list, &nft_net->binding_list);
380 break;
62e1e94b
PNA		 381 case NFT_MSG_NEWCHAIN:
382 if (!nft_trans_chain_update(trans) &&
383 nft_chain_binding(nft_trans_chain(trans)))
384 list_add_tail(&trans->binding_list, &nft_net->binding_list);
385 break;
938154b9
PNA		 386 }
387
0854db2a
FW		 388 list_add_tail(&trans->list, &nft_net->commit_list);
389}
390
ee01d542
AB		 391static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
392{
393 struct nft_trans *trans;
394
395 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
396 if (trans == NULL)
397 return -ENOMEM;
398
399 if (msg_type == NFT_MSG_NEWTABLE)
f2a6d766 400 nft_activate_next(ctx->net, ctx->table);
ee01d542 401
0854db2a 402 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 403 return 0;
404}
405
406static int nft_deltable(struct nft_ctx *ctx)
407{
408 int err;
409
410 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
411 if (err < 0)
412 return err;
413
f2a6d766 414 nft_deactivate_next(ctx->net, ctx->table);
ee01d542
AB		 415 return err;
416}
417
66293c46 418static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
ee01d542
AB		 419{
420 struct nft_trans *trans;
421
422 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
423 if (trans == NULL)
66293c46 424 return ERR_PTR(-ENOMEM);
ee01d542 425
74cccc3d 426 if (msg_type == NFT_MSG_NEWCHAIN) {
664b0f8c 427 nft_activate_next(ctx->net, ctx->chain);
ee01d542 428
74cccc3d
PNA		 429 if (ctx->nla[NFTA_CHAIN_ID]) {
430 nft_trans_chain_id(trans) =
431 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
432 }
433 }
4bedf9ee 434 nft_trans_chain(trans) = ctx->chain;
0854db2a 435 nft_trans_commit_list_add_tail(ctx->net, trans);
4bedf9ee 436
66293c46 437 return trans;
ee01d542
AB		 438}
439
440static int nft_delchain(struct nft_ctx *ctx)
441{
66293c46 442 struct nft_trans *trans;
ee01d542 443
66293c46
FW		 444 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
445 if (IS_ERR(trans))
446 return PTR_ERR(trans);
ee01d542 447
1689f259 448 nft_use_dec(&ctx->table->use);
664b0f8c 449 nft_deactivate_next(ctx->net, ctx->chain);
ee01d542 450
66293c46 451 return 0;
ee01d542
AB		 452}
453
4bedf9ee 454void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae
PNA		 455{
456 struct nft_expr *expr;
457
458 expr = nft_expr_first(rule);
31cc578a 459 while (nft_expr_more(rule, expr)) {
bb7b40ae
PNA		 460 if (expr->ops->activate)
461 expr->ops->activate(ctx, expr);
462
463 expr = nft_expr_next(expr);
464 }
465}
466
4bedf9ee
PNA		 467void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule,
468 enum nft_trans_phase phase)
bb7b40ae
PNA		 469{
470 struct nft_expr *expr;
471
472 expr = nft_expr_first(rule);
31cc578a 473 while (nft_expr_more(rule, expr)) {
bb7b40ae 474 if (expr->ops->deactivate)
f6ac8585 475 expr->ops->deactivate(ctx, expr, phase);
bb7b40ae
PNA		 476
477 expr = nft_expr_next(expr);
478 }
479}
480
ee01d542
AB		 481static int
482nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
483{
484 /* You cannot delete the same rule twice */
889f7ee7
PNA		 485 if (nft_is_active_next(ctx->net, rule)) {
486 nft_deactivate_next(ctx->net, rule);
1689f259 487 nft_use_dec(&ctx->chain->use);
ee01d542
AB		 488 return 0;
489 }
490 return -ENOENT;
491}
492
493static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
494 struct nft_rule *rule)
495{
496 struct nft_trans *trans;
497
498 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
499 if (trans == NULL)
500 return NULL;
501
1a94e38d
PNA		 502 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
503 nft_trans_rule_id(trans) =
504 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
505 }
ee01d542 506 nft_trans_rule(trans) = rule;
0854db2a 507 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 508
509 return trans;
510}
511
512static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
513{
63b48c73 514 struct nft_flow_rule *flow;
ee01d542
AB		 515 struct nft_trans *trans;
516 int err;
517
518 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
519 if (trans == NULL)
520 return -ENOMEM;
521
63b48c73
PNA		 522 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
523 flow = nft_flow_rule_create(ctx->net, rule);
524 if (IS_ERR(flow)) {
525 nft_trans_destroy(trans);
526 return PTR_ERR(flow);
527 }
528
529 nft_trans_flow_rule(trans) = flow;
530 }
531
ee01d542
AB		 532 err = nf_tables_delrule_deactivate(ctx, rule);
533 if (err < 0) {
534 nft_trans_destroy(trans);
535 return err;
536 }
f6ac8585 537 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
ee01d542
AB		 538
539 return 0;
540}
541
542static int nft_delrule_by_chain(struct nft_ctx *ctx)
543{
544 struct nft_rule *rule;
545 int err;
546
547 list_for_each_entry(rule, &ctx->chain->rules, list) {
23b7ca4f
PNA		 548 if (!nft_is_active_next(ctx->net, rule))
549 continue;
550
ee01d542
AB		 551 err = nft_delrule(ctx, rule);
552 if (err < 0)
553 return err;
554 }
555 return 0;
556}
557
123b9961
PNA		 558static int __nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
559 struct nft_set *set,
560 const struct nft_set_desc *desc)
ee01d542
AB		 561{
562 struct nft_trans *trans;
563
564 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
565 if (trans == NULL)
566 return -ENOMEM;
567
123b9961 568 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] && !desc) {
ee01d542
AB		 569 nft_trans_set_id(trans) =
570 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
37a9cc52 571 nft_activate_next(ctx->net, set);
ee01d542
AB		 572 }
573 nft_trans_set(trans) = set;
123b9961
PNA		 574 if (desc) {
575 nft_trans_set_update(trans) = true;
576 nft_trans_set_gc_int(trans) = desc->gc_int;
577 nft_trans_set_timeout(trans) = desc->timeout;
96b2ef9b 578 nft_trans_set_size(trans) = desc->size;
123b9961 579 }
0854db2a 580 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 581
582 return 0;
583}
584
123b9961
PNA		 585static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
586 struct nft_set *set)
587{
588 return __nft_trans_set_add(ctx, msg_type, set, NULL);
589}
590
628bd3e4
PNA		 591static int nft_mapelem_deactivate(const struct nft_ctx *ctx,
592 struct nft_set *set,
593 const struct nft_set_iter *iter,
0e1ea651 594 struct nft_elem_priv *elem_priv)
628bd3e4 595{
0e1ea651 596 nft_setelem_data_deactivate(ctx->net, set, elem_priv);
628bd3e4
PNA		 597
598 return 0;
599}
600
601struct nft_set_elem_catchall {
602 struct list_head list;
603 struct rcu_head rcu;
9dad402b 604 struct nft_elem_priv *elem;
628bd3e4
PNA		 605};
606
607static void nft_map_catchall_deactivate(const struct nft_ctx *ctx,
608 struct nft_set *set)
609{
610 u8 genmask = nft_genmask_next(ctx->net);
611 struct nft_set_elem_catchall *catchall;
628bd3e4
PNA		 612 struct nft_set_ext *ext;
613
614 list_for_each_entry(catchall, &set->catchall_list, list) {
615 ext = nft_set_elem_ext(set, catchall->elem);
616 if (!nft_set_elem_active(ext, genmask))
617 continue;
618
0e1ea651 619 nft_setelem_data_deactivate(ctx->net, set, catchall->elem);
628bd3e4
PNA		 620 break;
621 }
622}
623
624static void nft_map_deactivate(const struct nft_ctx *ctx, struct nft_set *set)
625{
626 struct nft_set_iter iter = {
627 .genmask = nft_genmask_next(ctx->net),
628 .fn = nft_mapelem_deactivate,
629 };
630
631 set->ops->walk(ctx, set, &iter);
632 WARN_ON_ONCE(iter.err);
633
634 nft_map_catchall_deactivate(ctx, set);
635}
636
cd5125d8 637static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
ee01d542
AB		 638{
639 int err;
640
641 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
642 if (err < 0)
643 return err;
644
628bd3e4
PNA		 645 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
646 nft_map_deactivate(ctx, set);
647
37a9cc52 648 nft_deactivate_next(ctx->net, set);
1689f259 649 nft_use_dec(&ctx->table->use);
ee01d542
AB		 650
651 return err;
652}
653
e5009240
PNA		 654static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
655 struct nft_object *obj)
656{
657 struct nft_trans *trans;
658
659 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
660 if (trans == NULL)
661 return -ENOMEM;
662
663 if (msg_type == NFT_MSG_NEWOBJ)
664 nft_activate_next(ctx->net, obj);
665
666 nft_trans_obj(trans) = obj;
0854db2a 667 nft_trans_commit_list_add_tail(ctx->net, trans);
e5009240
PNA		 668
669 return 0;
670}
671
672static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
673{
674 int err;
675
676 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
677 if (err < 0)
678 return err;
679
680 nft_deactivate_next(ctx->net, obj);
1689f259 681 nft_use_dec(&ctx->table->use);
e5009240
PNA		 682
683 return err;
684}
685
3b49e2e9
PNA		 686static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
687 struct nft_flowtable *flowtable)
688{
689 struct nft_trans *trans;
690
691 trans = nft_trans_alloc(ctx, msg_type,
692 sizeof(struct nft_trans_flowtable));
693 if (trans == NULL)
694 return -ENOMEM;
695
696 if (msg_type == NFT_MSG_NEWFLOWTABLE)
697 nft_activate_next(ctx->net, flowtable);
698
2c9e4559 699 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
3b49e2e9 700 nft_trans_flowtable(trans) = flowtable;
0854db2a 701 nft_trans_commit_list_add_tail(ctx->net, trans);
3b49e2e9
PNA		 702
703 return 0;
704}
705
706static int nft_delflowtable(struct nft_ctx *ctx,
707 struct nft_flowtable *flowtable)
708{
709 int err;
710
711 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
712 if (err < 0)
713 return err;
714
715 nft_deactivate_next(ctx->net, flowtable);
1689f259 716 nft_use_dec(&ctx->table->use);
3b49e2e9
PNA		 717
718 return err;
719}
720
34cc9e52
PNA		 721static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
722{
723 int i;
724
725 for (i = track->regs[dreg].num_reg; i > 0; i--)
726 __nft_reg_track_cancel(track, dreg - i);
727}
728
729static void __nft_reg_track_update(struct nft_regs_track *track,
730 const struct nft_expr *expr,
731 u8 dreg, u8 num_reg)
732{
733 track->regs[dreg].selector = expr;
734 track->regs[dreg].bitwise = NULL;
735 track->regs[dreg].num_reg = num_reg;
736}
737
738void nft_reg_track_update(struct nft_regs_track *track,
739 const struct nft_expr *expr, u8 dreg, u8 len)
740{
741 unsigned int regcount;
742 int i;
743
744 __nft_reg_track_clobber(track, dreg);
745
746 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
747 for (i = 0; i < regcount; i++, dreg++)
748 __nft_reg_track_update(track, expr, dreg, i);
749}
750EXPORT_SYMBOL_GPL(nft_reg_track_update);
751
752void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
753{
754 unsigned int regcount;
755 int i;
756
757 __nft_reg_track_clobber(track, dreg);
758
759 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
760 for (i = 0; i < regcount; i++, dreg++)
761 __nft_reg_track_cancel(track, dreg);
762}
763EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
764
765void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
766{
767 track->regs[dreg].selector = NULL;
768 track->regs[dreg].bitwise = NULL;
769 track->regs[dreg].num_reg = 0;
770}
771EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
772
96518518
PM		 773/*
774 * Tables
775 */
776
36596dad 777static struct nft_table *nft_table_lookup(const struct net *net,
f2a6d766 778 const struct nlattr *nla,
6001a930 779 u8 family, u8 genmask, u32 nlpid)
96518518 780{
0854db2a 781 struct nftables_pernet *nft_net;
96518518
PM		 782 struct nft_table *table;
783
cac20fcd
PNA		 784 if (nla == NULL)
785 return ERR_PTR(-EINVAL);
786
d59d2f82 787 nft_net = nft_pernet(net);
0854db2a
FW		 788 list_for_each_entry_rcu(table, &nft_net->tables, list,
789 lockdep_is_held(&nft_net->commit_mutex)) {
f2a6d766 790 if (!nla_strcmp(nla, table->name) &&
98319cb9 791 table->family == family &&
6001a930
PNA		 792 nft_active_genmask(table, genmask)) {
793 if (nft_table_has_owner(table) &&
53479909 794 nlpid && table->nlpid != nlpid)
6001a930
PNA		 795 return ERR_PTR(-EPERM);
796
96518518 797 return table;
6001a930 798 }
96518518 799 }
cac20fcd
PNA		 800
801 return ERR_PTR(-ENOENT);
96518518
PM		 802}
803
3ecbfd65
HS		 804static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
805 const struct nlattr *nla,
f6e1532a 806 int family, u8 genmask, u32 nlpid)
3ecbfd65 807{
0854db2a 808 struct nftables_pernet *nft_net;
3ecbfd65
HS		 809 struct nft_table *table;
810
d59d2f82 811 nft_net = nft_pernet(net);
0854db2a 812 list_for_each_entry(table, &nft_net->tables, list) {
3ecbfd65 813 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
f6e1532a 814 table->family == family &&
e31f072f
PNA		 815 nft_active_genmask(table, genmask)) {
816 if (nft_table_has_owner(table) &&
817 nlpid && table->nlpid != nlpid)
818 return ERR_PTR(-EPERM);
819
3ecbfd65 820 return table;
e31f072f 821 }
3ecbfd65 822 }
3ecbfd65
HS		 823
824 return ERR_PTR(-ENOENT);
825}
826
96518518
PM		 827static inline u64 nf_tables_alloc_handle(struct nft_table *table)
828{
829 return ++table->hgenerator;
830}
831
32537e91 832static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
9370761c 833
82603549
PNA		 834static const struct nft_chain_type *
835__nft_chain_type_get(u8 family, enum nft_chain_types type)
836{
837 if (family >= NFPROTO_NUMPROTO ||
838 type >= NFT_CHAIN_T_MAX)
839 return NULL;
840
841 return chain_type[family][type];
842}
843
32537e91 844static const struct nft_chain_type *
1ea26cca 845__nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
9370761c 846{
82603549 847 const struct nft_chain_type *type;
9370761c
PNA		 848 int i;
849
baae3e62 850 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
82603549
PNA		 851 type = __nft_chain_type_get(family, i);
852 if (!type)
853 continue;
854 if (!nla_strcmp(nla, type->name))
855 return type;
9370761c 856 }
baae3e62 857 return NULL;
9370761c
PNA		 858}
859
eb014de4
PNA		 860struct nft_module_request {
861 struct list_head list;
862 char module[MODULE_NAME_LEN];
863 bool done;
864};
865
452238e8 866#ifdef CONFIG_MODULES
cefa31a9
FW		 867__printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
868 ...)
452238e8
FW		 869{
870 char module_name[MODULE_NAME_LEN];
0854db2a 871 struct nftables_pernet *nft_net;
eb014de4 872 struct nft_module_request *req;
452238e8
FW		 873 va_list args;
874 int ret;
875
452238e8
FW		 876 va_start(args, fmt);
877 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
878 va_end(args);
9332d27d 879 if (ret >= MODULE_NAME_LEN)
eb014de4 880 return 0;
452238e8 881
d59d2f82 882 nft_net = nft_pernet(net);
0854db2a 883 list_for_each_entry(req, &nft_net->module_list, list) {
eb014de4
PNA		 884 if (!strcmp(req->module, module_name)) {
885 if (req->done)
886 return 0;
ec7470b8 887
eb014de4
PNA		 888 /* A request to load this module already exists. */
889 return -EAGAIN;
890 }
891 }
892
893 req = kmalloc(sizeof(*req), GFP_KERNEL);
894 if (!req)
895 return -ENOMEM;
896
897 req->done = false;
8556bceb 898 strscpy(req->module, module_name, MODULE_NAME_LEN);
0854db2a 899 list_add_tail(&req->list, &nft_net->module_list);
eb014de4
PNA		 900
901 return -EAGAIN;
452238e8 902}
cefa31a9 903EXPORT_SYMBOL_GPL(nft_request_module);
452238e8
FW		 904#endif
905
f102d66b
FW		 906static void lockdep_nfnl_nft_mutex_not_held(void)
907{
908#ifdef CONFIG_PROVE_LOCKING
c0700dfa
FW		 909 if (debug_locks)
910 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
f102d66b
FW		 911#endif
912}
913
32537e91 914static const struct nft_chain_type *
452238e8
FW		 915nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
916 u8 family, bool autoload)
9370761c 917{
32537e91 918 const struct nft_chain_type *type;
9370761c 919
1ea26cca 920 type = __nf_tables_chain_type_lookup(nla, family);
93b0806f
PM		 921 if (type != NULL)
922 return type;
f102d66b
FW		 923
924 lockdep_nfnl_nft_mutex_not_held();
9370761c 925#ifdef CONFIG_MODULES
93b0806f 926 if (autoload) {
eb014de4
PNA		 927 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
928 nla_len(nla),
929 (const char *)nla_data(nla)) == -EAGAIN)
93b0806f 930 return ERR_PTR(-EAGAIN);
9370761c
PNA		 931 }
932#endif
93b0806f 933 return ERR_PTR(-ENOENT);
9370761c
PNA		 934}
935
802b8051
PNA		 936static __be16 nft_base_seq(const struct net *net)
937{
d59d2f82 938 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 939
940 return htons(nft_net->base_seq & 0xffff);
802b8051
PNA		 941}
942
96518518 943static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
1cae565e
PNA		 944 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
945 .len = NFT_TABLE_MAXNAMELEN - 1 },
9ddf6323 946 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
3ecbfd65 947 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
7a81575b
JGG		 948 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
949 .len = NFT_USERDATA_MAXLEN }
96518518
PM		 950};
951
84d7fce6
PNA		 952static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
953 u32 portid, u32 seq, int event, u32 flags,
954 int family, const struct nft_table *table)
96518518
PM		 955{
956 struct nlmsghdr *nlh;
96518518 957
dedb67c4 958 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 959 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
960 NFNETLINK_V0, nft_base_seq(net));
961 if (!nlh)
96518518
PM		 962 goto nla_put_failure;
963
9ddf6323 964 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
3ecbfd65
HS		 965 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
966 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
967 NFTA_TABLE_PAD))
96518518 968 goto nla_put_failure;
28339b21
PNA		 969
970 if (event == NFT_MSG_DELTABLE) {
971 nlmsg_end(skb, nlh);
972 return 0;
973 }
974
975 if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
976 htonl(table->flags & NFT_TABLE_F_MASK)))
977 goto nla_put_failure;
978
6001a930
PNA		 979 if (nft_table_has_owner(table) &&
980 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
981 goto nla_put_failure;
96518518 982
7a81575b
JGG		 983 if (table->udata) {
984 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
985 goto nla_put_failure;
986 }
987
053c095a
JB		 988 nlmsg_end(skb, nlh);
989 return 0;
96518518
PM		 990
991nla_put_failure:
992 nlmsg_trim(skb, nlh);
993 return -1;
994}
995
67cc570e
PNA		 996struct nftnl_skb_parms {
997 bool report;
998};
999#define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
1000
1001static void nft_notify_enqueue(struct sk_buff *skb, bool report,
1002 struct list_head *notify_list)
1003{
1004 NFT_CB(skb).report = report;
1005 list_add_tail(&skb->list, notify_list);
1006}
1007
25e94a99 1008static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
96518518 1009{
0854db2a 1010 struct nftables_pernet *nft_net;
96518518 1011 struct sk_buff *skb;
6fb721cf 1012 u16 flags = 0;
96518518
PM		 1013 int err;
1014
128ad332
PNA		 1015 if (!ctx->report &&
1016 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1017 return;
96518518 1018
96518518
PM		 1019 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1020 if (skb == NULL)
1021 goto err;
1022
6fb721cf
PNA		 1023 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1024 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1025
84d7fce6 1026 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1027 event, flags, ctx->family, ctx->table);
96518518
PM		 1028 if (err < 0) {
1029 kfree_skb(skb);
1030 goto err;
1031 }
1032
d59d2f82 1033 nft_net = nft_pernet(ctx->net);
0854db2a 1034 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1035 return;
96518518 1036err:
25e94a99 1037 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1038}
1039
1040static int nf_tables_dump_tables(struct sk_buff *skb,
1041 struct netlink_callback *cb)
1042{
1043 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
0854db2a 1044 struct nftables_pernet *nft_net;
96518518
PM		 1045 const struct nft_table *table;
1046 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1047 struct net *net = sock_net(skb->sk);
96518518
PM		 1048 int family = nfmsg->nfgen_family;
1049
e688a7f8 1050 rcu_read_lock();
d59d2f82 1051 nft_net = nft_pernet(net);
34002783 1052 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1053
0854db2a 1054 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1055 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1056 continue;
1057
36596dad
PNA		 1058 if (idx < s_idx)
1059 goto cont;
1060 if (idx > s_idx)
1061 memset(&cb->args[1], 0,
1062 sizeof(cb->args) - sizeof(cb->args[0]));
1063 if (!nft_is_active(net, table))
1064 continue;
1065 if (nf_tables_fill_table_info(skb, net,
1066 NETLINK_CB(cb->skb).portid,
1067 cb->nlh->nlmsg_seq,
1068 NFT_MSG_NEWTABLE, NLM_F_MULTI,
98319cb9 1069 table->family, table) < 0)
36596dad
PNA		 1070 goto done;
1071
1072 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1073cont:
36596dad 1074 idx++;
96518518
PM		 1075 }
1076done:
e688a7f8 1077 rcu_read_unlock();
96518518
PM		 1078 cb->args[0] = idx;
1079 return skb->len;
1080}
1081
d9adf22a
FW		 1082static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
1083 const struct nlmsghdr *nlh,
1084 struct netlink_dump_control *c)
1085{
1086 int err;
1087
1088 if (!try_module_get(THIS_MODULE))
1089 return -EINVAL;
1090
1091 rcu_read_unlock();
1092 err = netlink_dump_start(nlsk, skb, nlh, c);
1093 rcu_read_lock();
1094 module_put(THIS_MODULE);
1095
1096 return err;
1097}
1098
1099/* called with rcu_read_lock held */
797d4980
PNA		 1100static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
1101 const struct nlattr * const nla[])
96518518 1102{
797d4980
PNA		 1103 struct netlink_ext_ack *extack = info->extack;
1104 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1105 u8 family = info->nfmsg->nfgen_family;
96518518 1106 const struct nft_table *table;
797d4980 1107 struct net *net = info->net;
96518518 1108 struct sk_buff *skb2;
96518518
PM		 1109 int err;
1110
797d4980 1111 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1112 struct netlink_dump_control c = {
1113 .dump = nf_tables_dump_tables,
d9adf22a 1114 .module = THIS_MODULE,
96518518 1115 };
d9adf22a 1116
797d4980 1117 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1118 }
1119
6001a930 1120 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
36dd1bcc
PNA		 1121 if (IS_ERR(table)) {
1122 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
96518518 1123 return PTR_ERR(table);
36dd1bcc 1124 }
96518518 1125
d9adf22a 1126 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1127 if (!skb2)
1128 return -ENOMEM;
1129
84d7fce6 1130 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
797d4980
PNA		 1131 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
1132 0, family, table);
96518518 1133 if (err < 0)
ee921183 1134 goto err_fill_table_info;
96518518 1135
ee921183 1136 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1137
ee921183 1138err_fill_table_info:
96518518
PM		 1139 kfree_skb(skb2);
1140 return err;
1141}
1142
c9c17211 1143static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
10435c11
F		 1144{
1145 struct nft_chain *chain;
1146 u32 i = 0;
1147
1148 list_for_each_entry(chain, &table->chains, list) {
1149 if (!nft_is_active_next(net, chain))
1150 continue;
f323d954 1151 if (!nft_is_base_chain(chain))
10435c11
F		 1152 continue;
1153
1154 if (cnt && i++ == cnt)
1155 break;
1156
1e9451cb 1157 nf_tables_unregister_hook(net, table, chain);
10435c11
F		 1158 }
1159}
1160
c9c17211 1161static int nf_tables_table_enable(struct net *net, struct nft_table *table)
9ddf6323
PNA		 1162{
1163 struct nft_chain *chain;
1164 int err, i = 0;
1165
1166 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1167 if (!nft_is_active_next(net, chain))
1168 continue;
f323d954 1169 if (!nft_is_base_chain(chain))
d2012975
PNA		 1170 continue;
1171
1e9451cb 1172 err = nf_tables_register_hook(net, table, chain);
9ddf6323 1173 if (err < 0)
d54725cd 1174 goto err_register_hooks;
9ddf6323
PNA		 1175
1176 i++;
1177 }
1178 return 0;
d54725cd
PNA		 1179
1180err_register_hooks:
10435c11 1181 if (i)
c9c17211 1182 nft_table_disable(net, table, i);
9ddf6323
PNA		 1183 return err;
1184}
1185
c9c17211 1186static void nf_tables_table_disable(struct net *net, struct nft_table *table)
9ddf6323 1187{
179d9ba5 1188 table->flags &= ~NFT_TABLE_F_DORMANT;
c9c17211 1189 nft_table_disable(net, table, 0);
179d9ba5 1190 table->flags |= NFT_TABLE_F_DORMANT;
9ddf6323
PNA		 1191}
1192
179d9ba5
PNA		 1193#define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1194#define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1195#define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1196#define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1197 __NFT_TABLE_F_WAS_AWAKEN)
0ce7cf41 1198
e1aaca93 1199static int nf_tables_updtable(struct nft_ctx *ctx)
9ddf6323 1200{
55dd6f93 1201 struct nft_trans *trans;
e1aaca93 1202 u32 flags;
179d9ba5 1203 int ret;
9ddf6323 1204
e1aaca93
PNA		 1205 if (!ctx->nla[NFTA_TABLE_FLAGS])
1206 return 0;
9ddf6323 1207
e1aaca93 1208 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1209 if (flags & ~NFT_TABLE_F_MASK)
1210 return -EOPNOTSUPP;
e1aaca93 1211
63283dd2
PNA		 1212 if (flags == ctx->table->flags)
1213 return 0;
1214
9cc0001a
PNA		 1215 if ((nft_table_has_owner(ctx->table) &&
1216 !(flags & NFT_TABLE_F_OWNER)) ||
1217 (!nft_table_has_owner(ctx->table) &&
1218 flags & NFT_TABLE_F_OWNER))
1219 return -EOPNOTSUPP;
1220
c9bd2651
FW		 1221 /* No dormant off/on/off/on games in single transaction */
1222 if (ctx->table->flags & __NFT_TABLE_F_UPDATE)
1223 return -EINVAL;
1224
55dd6f93
PNA		 1225 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1226 sizeof(struct nft_trans_table));
1227 if (trans == NULL)
1228 return -ENOMEM;
9ddf6323 1229
e1aaca93
PNA		 1230 if ((flags & NFT_TABLE_F_DORMANT) &&
1231 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
179d9ba5
PNA		 1232 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1233 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1234 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
e1aaca93
PNA		 1235 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1236 ctx->table->flags & NFT_TABLE_F_DORMANT) {
179d9ba5
PNA		 1237 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1238 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1239 ret = nf_tables_table_enable(ctx->net, ctx->table);
1240 if (ret < 0)
1241 goto err_register_hooks;
1242
1243 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1244 }
9ddf6323
PNA		 1245 }
1246
55dd6f93 1247 nft_trans_table_update(trans) = true;
0854db2a 1248 nft_trans_commit_list_add_tail(ctx->net, trans);
179d9ba5 1249
55dd6f93 1250 return 0;
179d9ba5
PNA		 1251
1252err_register_hooks:
55dd6f93 1253 nft_trans_destroy(trans);
9ddf6323
PNA		 1254 return ret;
1255}
1256
1b2470e5
FW		 1257static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1258{
1259 const char *name = data;
1260
1261 return jhash(name, strlen(name), seed);
1262}
1263
1264static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1265{
1266 const struct nft_chain *chain = data;
1267
1268 return nft_chain_hash(chain->name, 0, seed);
1269}
1270
1271static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1272 const void *ptr)
1273{
1274 const struct nft_chain *chain = ptr;
1275 const char *name = arg->key;
1276
1277 return strcmp(chain->name, name);
1278}
1279
4d44175a
FW		 1280static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1281{
1282 const struct nft_object_hash_key *k = data;
1283
1284 seed ^= hash_ptr(k->table, 32);
1285
1286 return jhash(k->name, strlen(k->name), seed);
1287}
1288
1289static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1290{
1291 const struct nft_object *obj = data;
1292
1293 return nft_objname_hash(&obj->key, 0, seed);
1294}
1295
1296static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1297 const void *ptr)
1298{
1299 const struct nft_object_hash_key *k = arg->key;
1300 const struct nft_object *obj = ptr;
1301
1302 if (obj->key.table != k->table)
1303 return -1;
1304
1305 return strcmp(obj->key.name, k->name);
1306}
1307
f1082dd3
PS		 1308static bool nft_supported_family(u8 family)
1309{
1310 return false
1311#ifdef CONFIG_NF_TABLES_INET
1312 || family == NFPROTO_INET
1313#endif
1314#ifdef CONFIG_NF_TABLES_IPV4
1315 || family == NFPROTO_IPV4
1316#endif
1317#ifdef CONFIG_NF_TABLES_ARP
1318 || family == NFPROTO_ARP
1319#endif
1320#ifdef CONFIG_NF_TABLES_NETDEV
1321 || family == NFPROTO_NETDEV
1322#endif
1323#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1324 || family == NFPROTO_BRIDGE
1325#endif
1326#ifdef CONFIG_NF_TABLES_IPV6
1327 || family == NFPROTO_IPV6
1328#endif
1329 ;
1330}
1331
7dab8ee3
PNA		 1332static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1333 const struct nlattr * const nla[])
96518518 1334{
7dab8ee3 1335 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 1336 struct netlink_ext_ack *extack = info->extack;
1337 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1338 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1339 struct net *net = info->net;
36dd1bcc
PNA		 1340 const struct nlattr *attr;
1341 struct nft_table *table;
e1aaca93 1342 struct nft_ctx ctx;
7a81575b 1343 u32 flags = 0;
55dd6f93 1344 int err;
96518518 1345
f1082dd3
PS		 1346 if (!nft_supported_family(family))
1347 return -EOPNOTSUPP;
1348
0854db2a 1349 lockdep_assert_held(&nft_net->commit_mutex);
36dd1bcc 1350 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1351 table = nft_table_lookup(net, attr, family, genmask,
1352 NETLINK_CB(skb).portid);
96518518
PM		 1353 if (IS_ERR(table)) {
1354 if (PTR_ERR(table) != -ENOENT)
1355 return PTR_ERR(table);
1a28ad74 1356 } else {
7dab8ee3 1357 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 1358 NL_SET_BAD_ATTR(extack, attr);
96518518 1359 return -EEXIST;
36dd1bcc 1360 }
7dab8ee3 1361 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518 1362 return -EOPNOTSUPP;
e1aaca93 1363
7dab8ee3
PNA		 1364 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1365
e1aaca93 1366 return nf_tables_updtable(&ctx);
96518518
PM		 1367 }
1368
c5c1f975
PM		 1369 if (nla[NFTA_TABLE_FLAGS]) {
1370 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1371 if (flags & ~NFT_TABLE_F_MASK)
1372 return -EOPNOTSUPP;
c5c1f975
PM		 1373 }
1374
ffdb210e 1375 err = -ENOMEM;
33758c89 1376 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
ffdb210e 1377 if (table == NULL)
98319cb9 1378 goto err_kzalloc;
96518518 1379
4b80ced9 1380 table->validate_state = nft_net->validate_state;
33758c89 1381 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
e46abbcc 1382 if (table->name == NULL)
98319cb9 1383 goto err_strdup;
e46abbcc 1384
7a81575b 1385 if (nla[NFTA_TABLE_USERDATA]) {
33758c89 1386 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
7a81575b
JGG		 1387 if (table->udata == NULL)
1388 goto err_table_udata;
1389
85db827a 1390 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
7a81575b
JGG		 1391 }
1392
1b2470e5
FW		 1393 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1394 if (err)
1395 goto err_chain_ht;
1396
96518518 1397 INIT_LIST_HEAD(&table->chains);
20a69341 1398 INIT_LIST_HEAD(&table->sets);
e5009240 1399 INIT_LIST_HEAD(&table->objects);
3b49e2e9 1400 INIT_LIST_HEAD(&table->flowtables);
98319cb9 1401 table->family = family;
c5c1f975 1402 table->flags = flags;
ab482c6b 1403 table->handle = ++nft_net->table_handle;
6001a930
PNA		 1404 if (table->flags & NFT_TABLE_F_OWNER)
1405 table->nlpid = NETLINK_CB(skb).portid;
9ddf6323 1406
7dab8ee3 1407 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
55dd6f93 1408 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
ffdb210e 1409 if (err < 0)
98319cb9 1410 goto err_trans;
ffdb210e 1411
0854db2a 1412 list_add_tail_rcu(&table->list, &nft_net->tables);
96518518 1413 return 0;
98319cb9 1414err_trans:
1b2470e5
FW		 1415 rhltable_destroy(&table->chains_ht);
1416err_chain_ht:
7a81575b
JGG		 1417 kfree(table->udata);
1418err_table_udata:
e46abbcc 1419 kfree(table->name);
98319cb9 1420err_strdup:
ffdb210e 1421 kfree(table);
98319cb9 1422err_kzalloc:
ffdb210e 1423 return err;
96518518
PM		 1424}
1425
b9ac12ef
AB		 1426static int nft_flush_table(struct nft_ctx *ctx)
1427{
3b49e2e9 1428 struct nft_flowtable *flowtable, *nft;
b9ac12ef 1429 struct nft_chain *chain, *nc;
e5009240 1430 struct nft_object *obj, *ne;
b9ac12ef 1431 struct nft_set *set, *ns;
3b49e2e9 1432 int err;
b9ac12ef 1433
a2f18db0 1434 list_for_each_entry(chain, &ctx->table->chains, list) {
664b0f8c
PNA		 1435 if (!nft_is_active_next(ctx->net, chain))
1436 continue;
1437
f15f29fd 1438 if (nft_chain_binding(chain))
d0e2c7de
PNA		 1439 continue;
1440
b9ac12ef
AB		 1441 ctx->chain = chain;
1442
1443 err = nft_delrule_by_chain(ctx);
1444 if (err < 0)
1445 goto out;
b9ac12ef
AB		 1446 }
1447
1448 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
37a9cc52
PNA		 1449 if (!nft_is_active_next(ctx->net, set))
1450 continue;
1451
23a3bfd4 1452 if (nft_set_is_anonymous(set))
b9ac12ef
AB		 1453 continue;
1454
1455 err = nft_delset(ctx, set);
1456 if (err < 0)
1457 goto out;
1458 }
1459
3b49e2e9 1460 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
335178d5
FW		 1461 if (!nft_is_active_next(ctx->net, flowtable))
1462 continue;
1463
3b49e2e9
PNA		 1464 err = nft_delflowtable(ctx, flowtable);
1465 if (err < 0)
1466 goto out;
1467 }
1468
e5009240 1469 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
335178d5
FW		 1470 if (!nft_is_active_next(ctx->net, obj))
1471 continue;
1472
e5009240
PNA		 1473 err = nft_delobj(ctx, obj);
1474 if (err < 0)
1475 goto out;
1476 }
1477
a2f18db0 1478 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
664b0f8c
PNA		 1479 if (!nft_is_active_next(ctx->net, chain))
1480 continue;
1481
f15f29fd 1482 if (nft_chain_binding(chain))
d0e2c7de
PNA		 1483 continue;
1484
a2f18db0
PNA		 1485 ctx->chain = chain;
1486
1487 err = nft_delchain(ctx);
1488 if (err < 0)
1489 goto out;
1490 }
1491
b9ac12ef
AB		 1492 err = nft_deltable(ctx);
1493out:
1494 return err;
1495}
1496
1497static int nft_flush(struct nft_ctx *ctx, int family)
1498{
d59d2f82 1499 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
b9ac12ef 1500 const struct nlattr * const *nla = ctx->nla;
d59d2f82 1501 struct nft_table *table, *nt;
b9ac12ef
AB		 1502 int err = 0;
1503
0854db2a 1504 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
98319cb9 1505 if (family != AF_UNSPEC && table->family != family)
b9ac12ef
AB		 1506 continue;
1507
98319cb9 1508 ctx->family = table->family;
f2a6d766 1509
36596dad
PNA		 1510 if (!nft_is_active_next(ctx->net, table))
1511 continue;
b9ac12ef 1512
6001a930
PNA		 1513 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1514 continue;
1515
36596dad
PNA		 1516 if (nla[NFTA_TABLE_NAME] &&
1517 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1518 continue;
b9ac12ef 1519
36596dad
PNA		 1520 ctx->table = table;
1521
1522 err = nft_flush_table(ctx);
1523 if (err < 0)
1524 goto out;
b9ac12ef
AB		 1525 }
1526out:
1527 return err;
1528}
1529
7dab8ee3
PNA		 1530static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1531 const struct nlattr * const nla[])
96518518 1532{
7dab8ee3
PNA		 1533 struct netlink_ext_ack *extack = info->extack;
1534 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1535 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1536 struct net *net = info->net;
36dd1bcc
PNA		 1537 const struct nlattr *attr;
1538 struct nft_table *table;
55dd6f93 1539 struct nft_ctx ctx;
96518518 1540
7dab8ee3 1541 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
3ecbfd65
HS		 1542 if (family == AF_UNSPEC ||
1543 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
b9ac12ef
AB		 1544 return nft_flush(&ctx, family);
1545
36dd1bcc
PNA		 1546 if (nla[NFTA_TABLE_HANDLE]) {
1547 attr = nla[NFTA_TABLE_HANDLE];
f6e1532a 1548 table = nft_table_lookup_byhandle(net, attr, family, genmask,
e31f072f 1549 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 1550 } else {
1551 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1552 table = nft_table_lookup(net, attr, family, genmask,
1553 NETLINK_CB(skb).portid);
36dd1bcc 1554 }
3ecbfd65 1555
36dd1bcc 1556 if (IS_ERR(table)) {
f80a612d
FFM		 1557 if (PTR_ERR(table) == -ENOENT &&
1558 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
1559 return 0;
1560
36dd1bcc 1561 NL_SET_BAD_ATTR(extack, attr);
96518518 1562 return PTR_ERR(table);
36dd1bcc 1563 }
96518518 1564
7dab8ee3 1565 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
a8278400
PNA		 1566 table->use > 0)
1567 return -EBUSY;
1568
98319cb9 1569 ctx.family = family;
b9ac12ef 1570 ctx.table = table;
55dd6f93 1571
b9ac12ef 1572 return nft_flush_table(&ctx);
96518518
PM		 1573}
1574
55dd6f93
PNA		 1575static void nf_tables_table_destroy(struct nft_ctx *ctx)
1576{
fa5950e4
FW		 1577 if (WARN_ON(ctx->table->use > 0))
1578 return;
4fefee57 1579
1b2470e5 1580 rhltable_destroy(&ctx->table->chains_ht);
e46abbcc 1581 kfree(ctx->table->name);
bc7a7082 1582 kfree(ctx->table->udata);
55dd6f93 1583 kfree(ctx->table);
55dd6f93
PNA		 1584}
1585
cc07eeb0 1586void nft_register_chain_type(const struct nft_chain_type *ctype)
96518518 1587{
96518518 1588 nfnl_lock(NFNL_SUBSYS_NFTABLES);
82603549 1589 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
cc07eeb0
PNA		 1590 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1591 return;
96518518 1592 }
9370761c 1593 chain_type[ctype->family][ctype->type] = ctype;
96518518 1594 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
96518518 1595}
9370761c 1596EXPORT_SYMBOL_GPL(nft_register_chain_type);
96518518 1597
32537e91 1598void nft_unregister_chain_type(const struct nft_chain_type *ctype)
96518518 1599{
96518518 1600 nfnl_lock(NFNL_SUBSYS_NFTABLES);
9370761c 1601 chain_type[ctype->family][ctype->type] = NULL;
96518518
PM		 1602 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1603}
9370761c 1604EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
96518518
PM		 1605
1606/*
1607 * Chains
1608 */
1609
1610static struct nft_chain *
cac20fcd 1611nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
96518518
PM		 1612{
1613 struct nft_chain *chain;
1614
1615 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1616 if (chain->handle == handle &&
1617 nft_active_genmask(chain, genmask))
96518518
PM		 1618 return chain;
1619 }
1620
1621 return ERR_PTR(-ENOENT);
1622}
1623
4d44175a 1624static bool lockdep_commit_lock_is_held(const struct net *net)
f102d66b
FW		 1625{
1626#ifdef CONFIG_PROVE_LOCKING
d59d2f82 1627 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 1628
1629 return lockdep_is_held(&nft_net->commit_mutex);
f102d66b
FW		 1630#else
1631 return true;
1632#endif
1633}
1634
1635static struct nft_chain *nft_chain_lookup(struct net *net,
1636 struct nft_table *table,
cac20fcd 1637 const struct nlattr *nla, u8 genmask)
96518518 1638{
1b2470e5
FW		 1639 char search[NFT_CHAIN_MAXNAMELEN + 1];
1640 struct rhlist_head *tmp, *list;
96518518
PM		 1641 struct nft_chain *chain;
1642
1643 if (nla == NULL)
1644 return ERR_PTR(-EINVAL);
1645
872f6903 1646 nla_strscpy(search, nla, sizeof(search));
96518518 1647
1b2470e5 1648 WARN_ON(!rcu_read_lock_held() &&
f102d66b 1649 !lockdep_commit_lock_is_held(net));
1b2470e5
FW		 1650
1651 chain = ERR_PTR(-ENOENT);
1652 rcu_read_lock();
1653 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1654 if (!list)
1655 goto out_unlock;
1656
1657 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1658 if (nft_active_genmask(chain, genmask))
1659 goto out_unlock;
1660 }
1661 chain = ERR_PTR(-ENOENT);
1662out_unlock:
1663 rcu_read_unlock();
1664 return chain;
96518518
PM		 1665}
1666
1667static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
b2fbd044
LZ		 1668 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1669 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 1670 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1671 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1672 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1673 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
0ca743a5 1674 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
9332d27d
FW		 1675 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1676 .len = NFT_MODULE_AUTOLOAD_LIMIT },
0ca743a5 1677 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
c9626a2c 1678 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
74cccc3d 1679 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
002f2176
JGG		 1680 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1681 .len = NFT_USERDATA_MAXLEN },
96518518
PM		 1682};
1683
1684static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1685 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1686 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
2cbce139
PNA		 1687 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1688 .len = IFNAMSIZ - 1 },
96518518
PM		 1689};
1690
0ca743a5
PNA		 1691static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1692{
1693 struct nft_stats *cpu_stats, total;
1694 struct nlattr *nest;
ce355e20
ED		 1695 unsigned int seq;
1696 u64 pkts, bytes;
0ca743a5
PNA		 1697 int cpu;
1698
edbd82c5
FW		 1699 if (!stats)
1700 return 0;
1701
0ca743a5
PNA		 1702 memset(&total, 0, sizeof(total));
1703 for_each_possible_cpu(cpu) {
1704 cpu_stats = per_cpu_ptr(stats, cpu);
ce355e20 1705 do {
d120d1a6 1706 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
ce355e20
ED		 1707 pkts = cpu_stats->pkts;
1708 bytes = cpu_stats->bytes;
d120d1a6 1709 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
ce355e20
ED		 1710 total.pkts += pkts;
1711 total.bytes += bytes;
0ca743a5 1712 }
ae0be8de 1713 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
0ca743a5
PNA		 1714 if (nest == NULL)
1715 goto nla_put_failure;
1716
b46f6ded
ND		 1717 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1718 NFTA_COUNTER_PAD) ||
1719 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1720 NFTA_COUNTER_PAD))
0ca743a5
PNA		 1721 goto nla_put_failure;
1722
1723 nla_nest_end(skb, nest);
1724 return 0;
1725
1726nla_put_failure:
1727 return -ENOSPC;
1728}
1729
d54725cd 1730static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
b9703ed4
PNA		 1731 const struct nft_base_chain *basechain,
1732 const struct list_head *hook_list)
d54725cd
PNA		 1733{
1734 const struct nf_hook_ops *ops = &basechain->ops;
1735 struct nft_hook *hook, *first = NULL;
1736 struct nlattr *nest, *nest_devs;
1737 int n = 0;
1738
1739 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1740 if (nest == NULL)
1741 goto nla_put_failure;
1742 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1743 goto nla_put_failure;
1744 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1745 goto nla_put_failure;
1746
d3519cb8 1747 if (nft_base_chain_netdev(family, ops->hooknum)) {
d54725cd 1748 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
bd058763
GI		 1749 if (!nest_devs)
1750 goto nla_put_failure;
b9703ed4
PNA		 1751
1752 if (!hook_list)
1753 hook_list = &basechain->hook_list;
1754
1755 list_for_each_entry(hook, hook_list, list) {
d54725cd
PNA		 1756 if (!first)
1757 first = hook;
1758
1759 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1760 hook->ops.dev->name))
1761 goto nla_put_failure;
1762 n++;
1763 }
1764 nla_nest_end(skb, nest_devs);
1765
1766 if (n == 1 &&
1767 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1768 goto nla_put_failure;
1769 }
1770 nla_nest_end(skb, nest);
1771
1772 return 0;
1773nla_put_failure:
1774 return -1;
1775}
1776
84d7fce6
PNA		 1777static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1778 u32 portid, u32 seq, int event, u32 flags,
1779 int family, const struct nft_table *table,
b9703ed4
PNA		 1780 const struct nft_chain *chain,
1781 const struct list_head *hook_list)
96518518
PM		 1782{
1783 struct nlmsghdr *nlh;
96518518 1784
dedb67c4 1785 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 1786 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1787 NFNETLINK_V0, nft_base_seq(net));
1788 if (!nlh)
96518518
PM		 1789 goto nla_put_failure;
1790
28339b21
PNA		 1791 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name) ||
1792 nla_put_string(skb, NFTA_CHAIN_NAME, chain->name) ||
1793 nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
b46f6ded 1794 NFTA_CHAIN_PAD))
96518518 1795 goto nla_put_failure;
28339b21 1796
7d937b10 1797 if (event == NFT_MSG_DELCHAIN && !hook_list) {
28339b21
PNA		 1798 nlmsg_end(skb, nlh);
1799 return 0;
1800 }
96518518 1801
f323d954 1802 if (nft_is_base_chain(chain)) {
0ca743a5 1803 const struct nft_base_chain *basechain = nft_base_chain(chain);
edbd82c5 1804 struct nft_stats __percpu *stats;
0ca743a5 1805
b9703ed4 1806 if (nft_dump_basechain_hook(skb, family, basechain, hook_list))
2cbce139 1807 goto nla_put_failure;
9370761c 1808
0ca743a5
PNA		 1809 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1810 htonl(basechain->policy)))
1811 goto nla_put_failure;
1812
baae3e62
PM		 1813 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1814 goto nla_put_failure;
0ca743a5 1815
edbd82c5
FW		 1816 stats = rcu_dereference_check(basechain->stats,
1817 lockdep_commit_lock_is_held(net));
1818 if (nft_dump_stats(skb, stats))
0ca743a5 1819 goto nla_put_failure;
96518518
PM		 1820 }
1821
d0e2c7de
PNA		 1822 if (chain->flags &&
1823 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1824 goto nla_put_failure;
1825
0ca743a5
PNA		 1826 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1827 goto nla_put_failure;
1828
002f2176
JGG		 1829 if (chain->udata &&
1830 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1831 goto nla_put_failure;
1832
053c095a
JB		 1833 nlmsg_end(skb, nlh);
1834 return 0;
96518518
PM		 1835
1836nla_put_failure:
1837 nlmsg_trim(skb, nlh);
1838 return -1;
1839}
1840
b9703ed4
PNA		 1841static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event,
1842 const struct list_head *hook_list)
96518518 1843{
0854db2a 1844 struct nftables_pernet *nft_net;
96518518 1845 struct sk_buff *skb;
6fb721cf 1846 u16 flags = 0;
96518518
PM		 1847 int err;
1848
128ad332
PNA		 1849 if (!ctx->report &&
1850 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1851 return;
96518518 1852
96518518
PM		 1853 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1854 if (skb == NULL)
1855 goto err;
1856
6fb721cf
PNA		 1857 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1858 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1859
84d7fce6 1860 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1861 event, flags, ctx->family, ctx->table,
b9703ed4 1862 ctx->chain, hook_list);
96518518
PM		 1863 if (err < 0) {
1864 kfree_skb(skb);
1865 goto err;
1866 }
1867
d59d2f82 1868 nft_net = nft_pernet(ctx->net);
0854db2a 1869 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1870 return;
96518518 1871err:
25e94a99 1872 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1873}
1874
1875static int nf_tables_dump_chains(struct sk_buff *skb,
1876 struct netlink_callback *cb)
1877{
1878 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
96518518 1879 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1880 struct net *net = sock_net(skb->sk);
96518518 1881 int family = nfmsg->nfgen_family;
0854db2a 1882 struct nftables_pernet *nft_net;
d59d2f82
PNA		 1883 const struct nft_table *table;
1884 const struct nft_chain *chain;
96518518 1885
e688a7f8 1886 rcu_read_lock();
d59d2f82 1887 nft_net = nft_pernet(net);
34002783 1888 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1889
0854db2a 1890 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1891 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1892 continue;
1893
36596dad
PNA		 1894 list_for_each_entry_rcu(chain, &table->chains, list) {
1895 if (idx < s_idx)
1896 goto cont;
1897 if (idx > s_idx)
1898 memset(&cb->args[1], 0,
1899 sizeof(cb->args) - sizeof(cb->args[0]));
1900 if (!nft_is_active(net, chain))
1901 continue;
1902 if (nf_tables_fill_chain_info(skb, net,
1903 NETLINK_CB(cb->skb).portid,
1904 cb->nlh->nlmsg_seq,
1905 NFT_MSG_NEWCHAIN,
1906 NLM_F_MULTI,
98319cb9 1907 table->family, table,
b9703ed4 1908 chain, NULL) < 0)
36596dad 1909 goto done;
38e029f1 1910
36596dad 1911 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1912cont:
36596dad 1913 idx++;
96518518
PM		 1914 }
1915 }
1916done:
e688a7f8 1917 rcu_read_unlock();
96518518
PM		 1918 cb->args[0] = idx;
1919 return skb->len;
1920}
1921
d9adf22a 1922/* called with rcu_read_lock held */
797d4980
PNA		 1923static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1924 const struct nlattr * const nla[])
96518518 1925{
797d4980
PNA		 1926 struct netlink_ext_ack *extack = info->extack;
1927 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1928 u8 family = info->nfmsg->nfgen_family;
96518518 1929 const struct nft_chain *chain;
797d4980 1930 struct net *net = info->net;
1b2470e5 1931 struct nft_table *table;
96518518 1932 struct sk_buff *skb2;
96518518
PM		 1933 int err;
1934
797d4980 1935 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1936 struct netlink_dump_control c = {
1937 .dump = nf_tables_dump_chains,
d9adf22a 1938 .module = THIS_MODULE,
96518518 1939 };
d9adf22a 1940
797d4980 1941 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1942 }
1943
6001a930 1944 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
36dd1bcc
PNA		 1945 if (IS_ERR(table)) {
1946 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 1947 return PTR_ERR(table);
36dd1bcc 1948 }
96518518 1949
f102d66b 1950 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
36dd1bcc
PNA		 1951 if (IS_ERR(chain)) {
1952 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
96518518 1953 return PTR_ERR(chain);
36dd1bcc 1954 }
96518518 1955
d9adf22a 1956 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1957 if (!skb2)
1958 return -ENOMEM;
1959
84d7fce6 1960 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 1961 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
b9703ed4 1962 0, family, table, chain, NULL);
96518518 1963 if (err < 0)
ee921183 1964 goto err_fill_chain_info;
96518518 1965
ee921183 1966 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1967
ee921183 1968err_fill_chain_info:
96518518
PM		 1969 kfree_skb(skb2);
1970 return err;
1971}
1972
0ca743a5
PNA		 1973static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1974 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1975 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1976};
1977
ff3cd7b3 1978static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
0ca743a5
PNA		 1979{
1980 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1981 struct nft_stats __percpu *newstats;
1982 struct nft_stats *stats;
1983 int err;
1984
8cb08174
JB		 1985 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1986 nft_counter_policy, NULL);
0ca743a5 1987 if (err < 0)
ff3cd7b3 1988 return ERR_PTR(err);
0ca743a5
PNA		 1989
1990 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
ff3cd7b3 1991 return ERR_PTR(-EINVAL);
0ca743a5 1992
ce355e20 1993 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
0ca743a5 1994 if (newstats == NULL)
ff3cd7b3 1995 return ERR_PTR(-ENOMEM);
0ca743a5
PNA		 1996
1997 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1998 * are not exposed to userspace.
1999 */
e8781f70 2000 preempt_disable();
0ca743a5
PNA		 2001 stats = this_cpu_ptr(newstats);
2002 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
2003 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
e8781f70 2004 preempt_enable();
0ca743a5 2005
ff3cd7b3
PNA		 2006 return newstats;
2007}
2008
53315ac6 2009static void nft_chain_stats_replace(struct nft_trans *trans)
ff3cd7b3 2010{
53315ac6 2011 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
0befd061 2012
53315ac6 2013 if (!nft_trans_chain_stats(trans))
b88825de
PNA		 2014 return;
2015
b685b534
PM		 2016 nft_trans_chain_stats(trans) =
2017 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
2018 lockdep_commit_lock_is_held(trans->ctx.net));
53315ac6
FW		 2019
2020 if (!nft_trans_chain_stats(trans))
bbb8c61f 2021 static_branch_inc(&nft_counters_enabled);
0ca743a5
PNA		 2022}
2023
0cbc06b3
FW		 2024static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
2025{
2c865a8a
PNA		 2026 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
2027 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
0cbc06b3
FW		 2028
2029 if (g0 != g1)
2030 kvfree(g1);
2031 kvfree(g0);
2032
2033 /* should be NULL either via abort or via successful commit */
2c865a8a
PNA		 2034 WARN_ON_ONCE(chain->blob_next);
2035 kvfree(chain->blob_next);
0cbc06b3
FW		 2036}
2037
d0e2c7de 2038void nf_tables_chain_destroy(struct nft_ctx *ctx)
91c7b38d 2039{
43a605f2 2040 struct nft_chain *chain = ctx->chain;
d54725cd 2041 struct nft_hook *hook, *next;
43a605f2 2042
fa5950e4
FW		 2043 if (WARN_ON(chain->use > 0))
2044 return;
91c7b38d 2045
0cbc06b3
FW		 2046 /* no concurrent access possible anymore */
2047 nf_tables_chain_free_chain_rules(chain);
2048
f323d954 2049 if (nft_is_base_chain(chain)) {
2cbce139
PNA		 2050 struct nft_base_chain *basechain = nft_base_chain(chain);
2051
d3519cb8 2052 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
d54725cd
PNA		 2053 list_for_each_entry_safe(hook, next,
2054 &basechain->hook_list, list) {
2055 list_del_rcu(&hook->list);
2056 kfree_rcu(hook, rcu);
2057 }
2058 }
2cbce139 2059 module_put(basechain->type->owner);
4c05ec47 2060 if (rcu_access_pointer(basechain->stats)) {
9f08ea84 2061 static_branch_dec(&nft_counters_enabled);
4c05ec47
TY		 2062 free_percpu(rcu_dereference_raw(basechain->stats));
2063 }
b7263e07 2064 kfree(chain->name);
002f2176 2065 kfree(chain->udata);
2cbce139 2066 kfree(basechain);
91c7b38d 2067 } else {
b7263e07 2068 kfree(chain->name);
002f2176 2069 kfree(chain->udata);
91c7b38d
PNA		 2070 kfree(chain);
2071 }
2072}
2073
3f0465a9
PNA		 2074static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
2075 const struct nlattr *attr)
2076{
2077 struct net_device *dev;
2078 char ifname[IFNAMSIZ];
2079 struct nft_hook *hook;
2080 int err;
2081
33758c89 2082 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
3f0465a9
PNA		 2083 if (!hook) {
2084 err = -ENOMEM;
2085 goto err_hook_alloc;
2086 }
2087
872f6903 2088 nla_strscpy(ifname, attr, IFNAMSIZ);
42f1c271
PNA		 2089 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
2090 * indirectly serializing all the other holders of the commit_mutex with
2091 * the rtnl_mutex.
2092 */
3f0465a9
PNA		 2093 dev = __dev_get_by_name(net, ifname);
2094 if (!dev) {
2095 err = -ENOENT;
2096 goto err_hook_dev;
2097 }
2098 hook->ops.dev = dev;
2099
2100 return hook;
2101
2102err_hook_dev:
2103 kfree(hook);
2104err_hook_alloc:
2105 return ERR_PTR(err);
2106}
2107
abadb2f8
PNA		 2108static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
2109 const struct nft_hook *this)
b75a3e83
PNA		 2110{
2111 struct nft_hook *hook;
2112
2113 list_for_each_entry(hook, hook_list, list) {
2114 if (this->ops.dev == hook->ops.dev)
abadb2f8 2115 return hook;
b75a3e83
PNA		 2116 }
2117
abadb2f8 2118 return NULL;
b75a3e83
PNA		 2119}
2120
3f0465a9
PNA		 2121static int nf_tables_parse_netdev_hooks(struct net *net,
2122 const struct nlattr *attr,
c3c060ad
PNA		 2123 struct list_head *hook_list,
2124 struct netlink_ext_ack *extack)
3f0465a9
PNA		 2125{
2126 struct nft_hook *hook, *next;
2127 const struct nlattr *tmp;
2128 int rem, n = 0, err;
2129
2130 nla_for_each_nested(tmp, attr, rem) {
2131 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
2132 err = -EINVAL;
2133 goto err_hook;
2134 }
2135
2136 hook = nft_netdev_hook_alloc(net, tmp);
2137 if (IS_ERR(hook)) {
c3c060ad 2138 NL_SET_BAD_ATTR(extack, tmp);
3f0465a9
PNA		 2139 err = PTR_ERR(hook);
2140 goto err_hook;
2141 }
b75a3e83 2142 if (nft_hook_list_find(hook_list, hook)) {
c3c060ad 2143 NL_SET_BAD_ATTR(extack, tmp);
cd77e75b 2144 kfree(hook);
b75a3e83
PNA		 2145 err = -EEXIST;
2146 goto err_hook;
2147 }
3f0465a9
PNA		 2148 list_add_tail(&hook->list, hook_list);
2149 n++;
2150
cb662ac6 2151 if (n == NFT_NETDEVICE_MAX) {
3f0465a9
PNA		 2152 err = -EFBIG;
2153 goto err_hook;
2154 }
2155 }
3f0465a9
PNA		 2156
2157 return 0;
2158
2159err_hook:
2160 list_for_each_entry_safe(hook, next, hook_list, list) {
2161 list_del(&hook->list);
2162 kfree(hook);
2163 }
2164 return err;
2165}
2166
508f8ccd
PNA		 2167struct nft_chain_hook {
2168 u32 num;
84ba7dd7 2169 s32 priority;
32537e91 2170 const struct nft_chain_type *type;
d54725cd 2171 struct list_head list;
508f8ccd
PNA		 2172};
2173
207296f1 2174static int nft_chain_parse_netdev(struct net *net, struct nlattr *tb[],
c3c060ad 2175 struct list_head *hook_list,
207296f1 2176 struct netlink_ext_ack *extack, u32 flags)
d54725cd
PNA		 2177{
2178 struct nft_hook *hook;
2179 int err;
2180
2181 if (tb[NFTA_HOOK_DEV]) {
2182 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
c3c060ad
PNA		 2183 if (IS_ERR(hook)) {
2184 NL_SET_BAD_ATTR(extack, tb[NFTA_HOOK_DEV]);
d54725cd 2185 return PTR_ERR(hook);
c3c060ad 2186 }
d54725cd
PNA		 2187
2188 list_add_tail(&hook->list, hook_list);
2189 } else if (tb[NFTA_HOOK_DEVS]) {
2190 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
c3c060ad 2191 hook_list, extack);
d54725cd
PNA		 2192 if (err < 0)
2193 return err;
05abe445 2194
d54725cd
PNA		 2195 }
2196
207296f1
PNA		 2197 if (flags & NFT_CHAIN_HW_OFFLOAD &&
2198 list_empty(hook_list))
2199 return -EINVAL;
2200
d54725cd
PNA		 2201 return 0;
2202}
2203
508f8ccd 2204static int nft_chain_parse_hook(struct net *net,
b9703ed4 2205 struct nft_base_chain *basechain,
508f8ccd 2206 const struct nlattr * const nla[],
36596dad 2207 struct nft_chain_hook *hook, u8 family,
207296f1 2208 u32 flags, struct netlink_ext_ack *extack)
508f8ccd 2209{
d59d2f82 2210 struct nftables_pernet *nft_net = nft_pernet(net);
508f8ccd 2211 struct nlattr *ha[NFTA_HOOK_MAX + 1];
32537e91 2212 const struct nft_chain_type *type;
508f8ccd
PNA		 2213 int err;
2214
0854db2a 2215 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b
FW		 2216 lockdep_nfnl_nft_mutex_not_held();
2217
8cb08174
JB		 2218 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2219 nla[NFTA_CHAIN_HOOK],
2220 nft_hook_policy, NULL);
508f8ccd
PNA		 2221 if (err < 0)
2222 return err;
2223
b9703ed4
PNA		 2224 if (!basechain) {
2225 if (!ha[NFTA_HOOK_HOOKNUM] ||
8509f62b
PNA		 2226 !ha[NFTA_HOOK_PRIORITY]) {
2227 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2228 return -ENOENT;
2229 }
508f8ccd 2230
b9703ed4
PNA		 2231 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2232 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
508f8ccd 2233
b9703ed4
PNA		 2234 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2235 if (!type)
2236 return -EOPNOTSUPP;
82603549 2237
b9703ed4
PNA		 2238 if (nla[NFTA_CHAIN_TYPE]) {
2239 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
2240 family, true);
2241 if (IS_ERR(type)) {
2242 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2243 return PTR_ERR(type);
2244 }
983c4fcb 2245 }
b9703ed4
PNA		 2246 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
2247 return -EOPNOTSUPP;
84ba7dd7 2248
b9703ed4
PNA		 2249 if (type->type == NFT_CHAIN_T_NAT &&
2250 hook->priority <= NF_IP_PRI_CONNTRACK)
2251 return -EOPNOTSUPP;
2252 } else {
2253 if (ha[NFTA_HOOK_HOOKNUM]) {
2254 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2255 if (hook->num != basechain->ops.hooknum)
2256 return -EOPNOTSUPP;
2257 }
2258 if (ha[NFTA_HOOK_PRIORITY]) {
2259 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2260 if (hook->priority != basechain->ops.priority)
2261 return -EOPNOTSUPP;
2262 }
2263
2264 type = basechain->type;
2265 }
84ba7dd7 2266
983c4fcb
PNA		 2267 if (!try_module_get(type->owner)) {
2268 if (nla[NFTA_CHAIN_TYPE])
2269 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
508f8ccd 2270 return -ENOENT;
983c4fcb 2271 }
508f8ccd
PNA		 2272
2273 hook->type = type;
2274
d54725cd 2275 INIT_LIST_HEAD(&hook->list);
d3519cb8 2276 if (nft_base_chain_netdev(family, hook->num)) {
207296f1 2277 err = nft_chain_parse_netdev(net, ha, &hook->list, extack, flags);
d54725cd 2278 if (err < 0) {
508f8ccd 2279 module_put(type->owner);
d54725cd 2280 return err;
508f8ccd 2281 }
d54725cd 2282 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
508f8ccd
PNA		 2283 module_put(type->owner);
2284 return -EOPNOTSUPP;
2285 }
2286
2287 return 0;
2288}
2289
2290static void nft_chain_release_hook(struct nft_chain_hook *hook)
2291{
d54725cd
PNA		 2292 struct nft_hook *h, *next;
2293
2294 list_for_each_entry_safe(h, next, &hook->list, list) {
2295 list_del(&h->list);
2296 kfree(h);
2297 }
508f8ccd 2298 module_put(hook->type->owner);
508f8ccd
PNA		 2299}
2300
e38fbfa9 2301static void nft_last_rule(const struct nft_chain *chain, const void *ptr)
0cbc06b3 2302{
e38fbfa9
FW		 2303 struct nft_rule_dp_last *lrule;
2304
2305 BUILD_BUG_ON(offsetof(struct nft_rule_dp_last, end) != 0);
2c865a8a 2306
e38fbfa9
FW		 2307 lrule = (struct nft_rule_dp_last *)ptr;
2308 lrule->end.is_last = 1;
2309 lrule->chain = chain;
2c865a8a
PNA		 2310 /* blob size does not include the trailer rule */
2311}
2312
e38fbfa9
FW		 2313static struct nft_rule_blob *nf_tables_chain_alloc_rules(const struct nft_chain *chain,
2314 unsigned int size)
2c865a8a
PNA		 2315{
2316 struct nft_rule_blob *blob;
2317
2c865a8a 2318 if (size > INT_MAX)
0cbc06b3
FW		 2319 return NULL;
2320
e38fbfa9
FW		 2321 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rule_dp_last);
2322
33758c89 2323 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2c865a8a 2324 if (!blob)
0cbc06b3
FW		 2325 return NULL;
2326
2c865a8a 2327 blob->size = 0;
e38fbfa9 2328 nft_last_rule(chain, blob->data);
0cbc06b3 2329
2c865a8a 2330 return blob;
0cbc06b3
FW		 2331}
2332
d54725cd
PNA		 2333static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2334 const struct nft_chain_hook *hook,
2335 struct nft_chain *chain)
2336{
c5c6accd
FW		 2337 ops->pf = family;
2338 ops->hooknum = hook->num;
2339 ops->priority = hook->priority;
2340 ops->priv = chain;
2341 ops->hook = hook->type->hooks[ops->hooknum];
2342 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
d54725cd
PNA		 2343}
2344
2345static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2346 struct nft_chain_hook *hook, u32 flags)
2347{
2348 struct nft_chain *chain;
2349 struct nft_hook *h;
2350
2351 basechain->type = hook->type;
2352 INIT_LIST_HEAD(&basechain->hook_list);
2353 chain = &basechain->chain;
2354
d3519cb8 2355 if (nft_base_chain_netdev(family, hook->num)) {
d54725cd
PNA		 2356 list_splice_init(&hook->list, &basechain->hook_list);
2357 list_for_each_entry(h, &basechain->hook_list, list)
2358 nft_basechain_hook_init(&h->ops, family, hook, chain);
d54725cd 2359 }
b9703ed4 2360 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
d54725cd 2361
67c49de4 2362 chain->flags |= NFT_CHAIN_BASE | flags;
d54725cd
PNA		 2363 basechain->policy = NF_ACCEPT;
2364 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
77972a36
PNA		 2365 !nft_chain_offload_support(basechain)) {
2366 list_splice_init(&basechain->hook_list, &hook->list);
d54725cd 2367 return -EOPNOTSUPP;
77972a36 2368 }
d54725cd
PNA		 2369
2370 flow_block_init(&basechain->flow_block);
2371
2372 return 0;
2373}
2374
4bedf9ee 2375int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
04b7db41
PNA		 2376{
2377 int err;
2378
2379 err = rhltable_insert_key(&table->chains_ht, chain->name,
2380 &chain->rhlhead, nft_chain_ht_params);
2381 if (err)
2382 return err;
2383
2384 list_add_tail_rcu(&chain->list, &table->chains);
2385
2386 return 0;
2387}
2388
d0e2c7de
PNA		 2389static u64 chain_id;
2390
4035285f 2391static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
983c4fcb
PNA		 2392 u8 policy, u32 flags,
2393 struct netlink_ext_ack *extack)
4035285f
PNA		 2394{
2395 const struct nlattr * const *nla = ctx->nla;
2396 struct nft_table *table = ctx->table;
4035285f 2397 struct nft_base_chain *basechain;
4035285f 2398 struct net *net = ctx->net;
d0e2c7de 2399 char name[NFT_NAME_MAXLEN];
2c865a8a 2400 struct nft_rule_blob *blob;
66293c46 2401 struct nft_trans *trans;
4035285f 2402 struct nft_chain *chain;
4035285f
PNA		 2403 int err;
2404
4035285f 2405 if (nla[NFTA_CHAIN_HOOK]) {
921ebde3 2406 struct nft_stats __percpu *stats = NULL;
b9703ed4 2407 struct nft_chain_hook hook = {};
4035285f 2408
d0e2c7de
PNA		 2409 if (flags & NFT_CHAIN_BINDING)
2410 return -EOPNOTSUPP;
2411
207296f1 2412 err = nft_chain_parse_hook(net, NULL, nla, &hook, family, flags,
b9703ed4 2413 extack);
4035285f
PNA		 2414 if (err < 0)
2415 return err;
2416
33758c89 2417 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2418 if (basechain == NULL) {
2419 nft_chain_release_hook(&hook);
2420 return -ENOMEM;
2421 }
d54725cd 2422 chain = &basechain->chain;
4035285f
PNA		 2423
2424 if (nla[NFTA_CHAIN_COUNTERS]) {
2425 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2426 if (IS_ERR(stats)) {
2427 nft_chain_release_hook(&hook);
2428 kfree(basechain);
2429 return PTR_ERR(stats);
2430 }
4c05ec47 2431 rcu_assign_pointer(basechain->stats, stats);
4035285f
PNA		 2432 }
2433
d54725cd
PNA		 2434 err = nft_basechain_init(basechain, family, &hook, flags);
2435 if (err < 0) {
2436 nft_chain_release_hook(&hook);
2437 kfree(basechain);
9a4d6dd5 2438 free_percpu(stats);
d54725cd
PNA		 2439 return err;
2440 }
921ebde3
TH		 2441 if (stats)
2442 static_branch_inc(&nft_counters_enabled);
4035285f 2443 } else {
d0e2c7de
PNA		 2444 if (flags & NFT_CHAIN_BASE)
2445 return -EINVAL;
2446 if (flags & NFT_CHAIN_HW_OFFLOAD)
2447 return -EOPNOTSUPP;
2448
33758c89 2449 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2450 if (chain == NULL)
2451 return -ENOMEM;
d0e2c7de
PNA		 2452
2453 chain->flags = flags;
4035285f 2454 }
43a605f2
PNA		 2455 ctx->chain = chain;
2456
4035285f
PNA		 2457 INIT_LIST_HEAD(&chain->rules);
2458 chain->handle = nf_tables_alloc_handle(table);
2459 chain->table = table;
d0e2c7de
PNA		 2460
2461 if (nla[NFTA_CHAIN_NAME]) {
33758c89 2462 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
d0e2c7de 2463 } else {
59136aa3
FW		 2464 if (!(flags & NFT_CHAIN_BINDING)) {
2465 err = -EINVAL;
002f2176 2466 goto err_destroy_chain;
59136aa3 2467 }
d0e2c7de
PNA		 2468
2469 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
33758c89 2470 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
d0e2c7de
PNA		 2471 }
2472
4035285f
PNA		 2473 if (!chain->name) {
2474 err = -ENOMEM;
002f2176
JGG		 2475 goto err_destroy_chain;
2476 }
2477
2478 if (nla[NFTA_CHAIN_USERDATA]) {
33758c89 2479 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
002f2176
JGG		 2480 if (chain->udata == NULL) {
2481 err = -ENOMEM;
2482 goto err_destroy_chain;
2483 }
2484 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
4035285f
PNA		 2485 }
2486
e38fbfa9 2487 blob = nf_tables_chain_alloc_rules(chain, 0);
2c865a8a 2488 if (!blob) {
0cbc06b3 2489 err = -ENOMEM;
002f2176 2490 goto err_destroy_chain;
0cbc06b3
FW		 2491 }
2492
2c865a8a
PNA		 2493 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2494 RCU_INIT_POINTER(chain->blob_gen_1, blob);
0cbc06b3 2495
c974a3a3 2496 err = nf_tables_register_hook(net, table, chain);
4035285f 2497 if (err < 0)
002f2176 2498 goto err_destroy_chain;
4035285f 2499
1689f259
PNA		 2500 if (!nft_use_inc(&table->use)) {
2501 err = -EMFILE;
2502 goto err_use;
2503 }
2504
66293c46
FW		 2505 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2506 if (IS_ERR(trans)) {
2507 err = PTR_ERR(trans);
002f2176 2508 goto err_unregister_hook;
1b2470e5 2509 }
4035285f 2510
ad652f38 2511 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
66293c46
FW		 2512 if (nft_is_base_chain(chain))
2513 nft_trans_chain_policy(trans) = policy;
2514
04b7db41
PNA		 2515 err = nft_chain_add(table, chain);
2516 if (err < 0) {
2517 nft_trans_destroy(trans);
002f2176 2518 goto err_unregister_hook;
04b7db41
PNA		 2519 }
2520
4035285f 2521 return 0;
1689f259 2522
002f2176 2523err_unregister_hook:
1689f259
PNA		 2524 nft_use_dec_restore(&table->use);
2525err_use:
c974a3a3 2526 nf_tables_unregister_hook(net, table, chain);
002f2176 2527err_destroy_chain:
43a605f2 2528 nf_tables_chain_destroy(ctx);
4035285f
PNA		 2529
2530 return err;
2531}
2532
c9626a2c 2533static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
98a381a7
PNA		 2534 u32 flags, const struct nlattr *attr,
2535 struct netlink_ext_ack *extack)
2c4a488a
PNA		 2536{
2537 const struct nlattr * const *nla = ctx->nla;
b9703ed4 2538 struct nft_base_chain *basechain = NULL;
2c4a488a
PNA		 2539 struct nft_table *table = ctx->table;
2540 struct nft_chain *chain = ctx->chain;
b9703ed4 2541 struct nft_chain_hook hook = {};
2c4a488a 2542 struct nft_stats *stats = NULL;
b9703ed4 2543 struct nft_hook *h, *next;
2c4a488a
PNA		 2544 struct nf_hook_ops *ops;
2545 struct nft_trans *trans;
b9703ed4 2546 bool unregister = false;
c974a3a3 2547 int err;
2c4a488a 2548
c9626a2c
PNA		 2549 if (chain->flags ^ flags)
2550 return -EOPNOTSUPP;
2551
b9703ed4
PNA		 2552 INIT_LIST_HEAD(&hook.list);
2553
2c4a488a 2554 if (nla[NFTA_CHAIN_HOOK]) {
98a381a7
PNA		 2555 if (!nft_is_base_chain(chain)) {
2556 NL_SET_BAD_ATTR(extack, attr);
77a92189 2557 return -EEXIST;
98a381a7 2558 }
b9703ed4
PNA		 2559
2560 basechain = nft_base_chain(chain);
2561 err = nft_chain_parse_hook(ctx->net, basechain, nla, &hook,
207296f1 2562 ctx->family, flags, extack);
2c4a488a
PNA		 2563 if (err < 0)
2564 return err;
2565
2c4a488a
PNA		 2566 if (basechain->type != hook.type) {
2567 nft_chain_release_hook(&hook);
98a381a7 2568 NL_SET_BAD_ATTR(extack, attr);
77a92189 2569 return -EEXIST;
2c4a488a
PNA		 2570 }
2571
b9703ed4
PNA		 2572 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2573 list_for_each_entry_safe(h, next, &hook.list, list) {
2574 h->ops.pf = basechain->ops.pf;
2575 h->ops.hooknum = basechain->ops.hooknum;
2576 h->ops.priority = basechain->ops.priority;
2577 h->ops.priv = basechain->ops.priv;
2578 h->ops.hook = basechain->ops.hook;
2579
2580 if (nft_hook_list_find(&basechain->hook_list, h)) {
2581 list_del(&h->list);
2582 kfree(h);
2583 }
d54725cd
PNA		 2584 }
2585 } else {
2586 ops = &basechain->ops;
2587 if (ops->hooknum != hook.num ||
2588 ops->priority != hook.priority) {
2589 nft_chain_release_hook(&hook);
98a381a7 2590 NL_SET_BAD_ATTR(extack, attr);
77a92189 2591 return -EEXIST;
d54725cd 2592 }
2c4a488a 2593 }
2c4a488a
PNA		 2594 }
2595
2596 if (nla[NFTA_CHAIN_HANDLE] &&
2597 nla[NFTA_CHAIN_NAME]) {
2598 struct nft_chain *chain2;
2599
f102d66b
FW		 2600 chain2 = nft_chain_lookup(ctx->net, table,
2601 nla[NFTA_CHAIN_NAME], genmask);
98a381a7
PNA		 2602 if (!IS_ERR(chain2)) {
2603 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
b9703ed4
PNA		 2604 err = -EEXIST;
2605 goto err_hooks;
98a381a7 2606 }
2c4a488a
PNA		 2607 }
2608
2609 if (nla[NFTA_CHAIN_COUNTERS]) {
b9703ed4
PNA		 2610 if (!nft_is_base_chain(chain)) {
2611 err = -EOPNOTSUPP;
2612 goto err_hooks;
2613 }
2c4a488a
PNA		 2614
2615 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
b9703ed4
PNA		 2616 if (IS_ERR(stats)) {
2617 err = PTR_ERR(stats);
2618 goto err_hooks;
2619 }
2c4a488a
PNA		 2620 }
2621
b9703ed4
PNA		 2622 if (!(table->flags & NFT_TABLE_F_DORMANT) &&
2623 nft_is_base_chain(chain) &&
2624 !list_empty(&hook.list)) {
2625 basechain = nft_base_chain(chain);
2626 ops = &basechain->ops;
2627
2628 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {
2629 err = nft_netdev_register_hooks(ctx->net, &hook.list);
2630 if (err < 0)
2631 goto err_hooks;
2632 }
2633 }
2634
2635 unregister = true;
c6cc94df 2636 err = -ENOMEM;
2c4a488a
PNA		 2637 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2638 sizeof(struct nft_trans_chain));
c6cc94df 2639 if (trans == NULL)
b9703ed4 2640 goto err_trans;
2c4a488a
PNA		 2641
2642 nft_trans_chain_stats(trans) = stats;
2643 nft_trans_chain_update(trans) = true;
2644
2645 if (nla[NFTA_CHAIN_POLICY])
2646 nft_trans_chain_policy(trans) = policy;
2647 else
2648 nft_trans_chain_policy(trans) = -1;
2649
c6cc94df
FW		 2650 if (nla[NFTA_CHAIN_HANDLE] &&
2651 nla[NFTA_CHAIN_NAME]) {
d59d2f82 2652 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c6cc94df
FW		 2653 struct nft_trans *tmp;
2654 char *name;
2655
2656 err = -ENOMEM;
33758c89 2657 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
c6cc94df 2658 if (!name)
b9703ed4 2659 goto err_trans;
c6cc94df
FW		 2660
2661 err = -EEXIST;
0854db2a 2662 list_for_each_entry(tmp, &nft_net->commit_list, list) {
c6cc94df
FW		 2663 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2664 tmp->ctx.table == table &&
2665 nft_trans_chain_update(tmp) &&
2666 nft_trans_chain_name(tmp) &&
2667 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
98a381a7 2668 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
c6cc94df 2669 kfree(name);
b9703ed4 2670 goto err_trans;
c6cc94df 2671 }
2c4a488a 2672 }
c6cc94df
FW		 2673
2674 nft_trans_chain_name(trans) = name;
2c4a488a 2675 }
b9703ed4
PNA		 2676
2677 nft_trans_basechain(trans) = basechain;
2678 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2679 list_splice(&hook.list, &nft_trans_chain_hooks(trans));
043d2acf
PNA		 2680 if (nla[NFTA_CHAIN_HOOK])
2681 module_put(hook.type->owner);
b9703ed4 2682
0854db2a 2683 nft_trans_commit_list_add_tail(ctx->net, trans);
2c4a488a
PNA		 2684
2685 return 0;
b9703ed4
PNA		 2686
2687err_trans:
c6cc94df
FW		 2688 free_percpu(stats);
2689 kfree(trans);
b9703ed4
PNA		 2690err_hooks:
2691 if (nla[NFTA_CHAIN_HOOK]) {
2692 list_for_each_entry_safe(h, next, &hook.list, list) {
2693 if (unregister)
2694 nf_unregister_net_hook(ctx->net, &h->ops);
2695 list_del(&h->list);
2696 kfree_rcu(h, rcu);
2697 }
2698 module_put(hook.type->owner);
2699 }
2700
c6cc94df 2701 return err;
2c4a488a
PNA		 2702}
2703
837830a4 2704static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
95f466d2 2705 const struct nft_table *table,
515ad530 2706 const struct nlattr *nla, u8 genmask)
837830a4 2707{
d59d2f82 2708 struct nftables_pernet *nft_net = nft_pernet(net);
837830a4
PNA		 2709 u32 id = ntohl(nla_get_be32(nla));
2710 struct nft_trans *trans;
2711
0854db2a 2712 list_for_each_entry(trans, &nft_net->commit_list, list) {
837830a4
PNA		 2713 struct nft_chain *chain = trans->ctx.chain;
2714
2715 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
95f466d2 2716 chain->table == table &&
515ad530
TLSC		 2717 id == nft_trans_chain_id(trans) &&
2718 nft_active_genmask(chain, genmask))
837830a4
PNA		 2719 return chain;
2720 }
2721 return ERR_PTR(-ENOENT);
2722}
2723
7dab8ee3
PNA		 2724static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2725 const struct nlattr * const nla[])
96518518 2726{
7dab8ee3 2727 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 2728 struct netlink_ext_ack *extack = info->extack;
2729 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2730 u8 family = info->nfmsg->nfgen_family;
74cccc3d 2731 struct nft_chain *chain = NULL;
7dab8ee3 2732 struct net *net = info->net;
36dd1bcc 2733 const struct nlattr *attr;
96518518 2734 struct nft_table *table;
57de2a0c 2735 u8 policy = NF_ACCEPT;
4035285f 2736 struct nft_ctx ctx;
96518518 2737 u64 handle = 0;
c9626a2c 2738 u32 flags = 0;
96518518 2739
0854db2a 2740 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 2741
6001a930
PNA		 2742 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2743 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2744 if (IS_ERR(table)) {
2745 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2746 return PTR_ERR(table);
36dd1bcc 2747 }
96518518 2748
96518518 2749 chain = NULL;
36dd1bcc 2750 attr = nla[NFTA_CHAIN_NAME];
96518518
PM		 2751
2752 if (nla[NFTA_CHAIN_HANDLE]) {
2753 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
cac20fcd 2754 chain = nft_chain_lookup_byhandle(table, handle, genmask);
36dd1bcc
PNA		 2755 if (IS_ERR(chain)) {
2756 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
96518518 2757 return PTR_ERR(chain);
36dd1bcc
PNA		 2758 }
2759 attr = nla[NFTA_CHAIN_HANDLE];
74cccc3d 2760 } else if (nla[NFTA_CHAIN_NAME]) {
f102d66b 2761 chain = nft_chain_lookup(net, table, attr, genmask);
96518518 2762 if (IS_ERR(chain)) {
36dd1bcc
PNA		 2763 if (PTR_ERR(chain) != -ENOENT) {
2764 NL_SET_BAD_ATTR(extack, attr);
96518518 2765 return PTR_ERR(chain);
36dd1bcc 2766 }
96518518
PM		 2767 chain = NULL;
2768 }
74cccc3d
PNA		 2769 } else if (!nla[NFTA_CHAIN_ID]) {
2770 return -EINVAL;
96518518
PM		 2771 }
2772
57de2a0c 2773 if (nla[NFTA_CHAIN_POLICY]) {
f323d954 2774 if (chain != NULL &&
36dd1bcc
PNA		 2775 !nft_is_base_chain(chain)) {
2776 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
d6b6cb1d 2777 return -EOPNOTSUPP;
36dd1bcc 2778 }
d6b6cb1d
PNA		 2779
2780 if (chain == NULL &&
36dd1bcc
PNA		 2781 nla[NFTA_CHAIN_HOOK] == NULL) {
2782 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
57de2a0c 2783 return -EOPNOTSUPP;
36dd1bcc 2784 }
57de2a0c 2785
8f46df18 2786 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
57de2a0c
PM		 2787 switch (policy) {
2788 case NF_DROP:
2789 case NF_ACCEPT:
2790 break;
2791 default:
2792 return -EINVAL;
2793 }
2794 }
2795
c9626a2c
PNA		 2796 if (nla[NFTA_CHAIN_FLAGS])
2797 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
b717273d
FW		 2798 else if (chain)
2799 flags = chain->flags;
c9626a2c 2800
c1f79a2e
PNA		 2801 if (flags & ~NFT_CHAIN_FLAGS)
2802 return -EOPNOTSUPP;
2803
7dab8ee3 2804 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4035285f 2805
96518518 2806 if (chain != NULL) {
5dc52d83
PNA		 2807 if (chain->flags & NFT_CHAIN_BINDING)
2808 return -EINVAL;
2809
7dab8ee3 2810 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 2811 NL_SET_BAD_ATTR(extack, attr);
96518518 2812 return -EEXIST;
36dd1bcc 2813 }
7dab8ee3 2814 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 2815 return -EOPNOTSUPP;
2816
67c49de4 2817 flags |= chain->flags & NFT_CHAIN_BASE;
98a381a7
PNA		 2818 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2819 extack);
96518518
PM		 2820 }
2821
983c4fcb 2822 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
96518518
PM		 2823}
2824
42e344f0
PS		 2825static int nft_delchain_hook(struct nft_ctx *ctx,
2826 struct nft_base_chain *basechain,
7d937b10
PNA		 2827 struct netlink_ext_ack *extack)
2828{
42e344f0 2829 const struct nft_chain *chain = &basechain->chain;
7d937b10
PNA		 2830 const struct nlattr * const *nla = ctx->nla;
2831 struct nft_chain_hook chain_hook = {};
7d937b10
PNA		 2832 struct nft_hook *this, *hook;
2833 LIST_HEAD(chain_del_list);
2834 struct nft_trans *trans;
2835 int err;
2836
7d937b10 2837 err = nft_chain_parse_hook(ctx->net, basechain, nla, &chain_hook,
207296f1 2838 ctx->family, chain->flags, extack);
7d937b10
PNA		 2839 if (err < 0)
2840 return err;
2841
2842 list_for_each_entry(this, &chain_hook.list, list) {
2843 hook = nft_hook_list_find(&basechain->hook_list, this);
2844 if (!hook) {
2845 err = -ENOENT;
2846 goto err_chain_del_hook;
2847 }
2848 list_move(&hook->list, &chain_del_list);
2849 }
2850
2851 trans = nft_trans_alloc(ctx, NFT_MSG_DELCHAIN,
2852 sizeof(struct nft_trans_chain));
2853 if (!trans) {
2854 err = -ENOMEM;
2855 goto err_chain_del_hook;
2856 }
2857
2858 nft_trans_basechain(trans) = basechain;
2859 nft_trans_chain_update(trans) = true;
2860 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2861 list_splice(&chain_del_list, &nft_trans_chain_hooks(trans));
2862 nft_chain_release_hook(&chain_hook);
2863
2864 nft_trans_commit_list_add_tail(ctx->net, trans);
2865
2866 return 0;
2867
2868err_chain_del_hook:
2869 list_splice(&chain_del_list, &basechain->hook_list);
2870 nft_chain_release_hook(&chain_hook);
2871
2872 return err;
2873}
2874
7dab8ee3
PNA		 2875static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2876 const struct nlattr * const nla[])
96518518 2877{
7dab8ee3
PNA		 2878 struct netlink_ext_ack *extack = info->extack;
2879 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2880 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 2881 struct net *net = info->net;
36dd1bcc 2882 const struct nlattr *attr;
96518518
PM		 2883 struct nft_table *table;
2884 struct nft_chain *chain;
9dee1474 2885 struct nft_rule *rule;
91c7b38d 2886 struct nft_ctx ctx;
3ecbfd65 2887 u64 handle;
9dee1474
PNA		 2888 u32 use;
2889 int err;
96518518 2890
6001a930
PNA		 2891 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2892 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2893 if (IS_ERR(table)) {
2894 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2895 return PTR_ERR(table);
36dd1bcc 2896 }
96518518 2897
3ecbfd65 2898 if (nla[NFTA_CHAIN_HANDLE]) {
36dd1bcc
PNA		 2899 attr = nla[NFTA_CHAIN_HANDLE];
2900 handle = be64_to_cpu(nla_get_be64(attr));
cac20fcd 2901 chain = nft_chain_lookup_byhandle(table, handle, genmask);
3ecbfd65 2902 } else {
36dd1bcc 2903 attr = nla[NFTA_CHAIN_NAME];
f102d66b 2904 chain = nft_chain_lookup(net, table, attr, genmask);
3ecbfd65 2905 }
36dd1bcc 2906 if (IS_ERR(chain)) {
f80a612d
FFM		 2907 if (PTR_ERR(chain) == -ENOENT &&
2908 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
2909 return 0;
2910
36dd1bcc 2911 NL_SET_BAD_ATTR(extack, attr);
96518518 2912 return PTR_ERR(chain);
36dd1bcc 2913 }
9dee1474 2914
f15f29fd
PNA		 2915 if (nft_chain_binding(chain))
2916 return -EOPNOTSUPP;
2917
7d937b10
PNA		 2918 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2919
2920 if (nla[NFTA_CHAIN_HOOK]) {
2921 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2922 return -EOPNOTSUPP;
2923
42e344f0
PS		 2924 if (nft_is_base_chain(chain)) {
2925 struct nft_base_chain *basechain = nft_base_chain(chain);
2926
2927 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
2928 return nft_delchain_hook(&ctx, basechain, extack);
2929 }
7d937b10
PNA		 2930 }
2931
7dab8ee3 2932 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
9dee1474 2933 chain->use > 0)
96518518
PM		 2934 return -EBUSY;
2935
9dee1474
PNA		 2936 use = chain->use;
2937 list_for_each_entry(rule, &chain->rules, list) {
2938 if (!nft_is_active_next(net, rule))
2939 continue;
2940 use--;
2941
2942 err = nft_delrule(&ctx, rule);
2943 if (err < 0)
2944 return err;
2945 }
2946
2947 /* There are rules and elements that are still holding references to us,
2948 * we cannot do a recursive removal in this case.
2949 */
36dd1bcc
PNA		 2950 if (use > 0) {
2951 NL_SET_BAD_ATTR(extack, attr);
9dee1474 2952 return -EBUSY;
36dd1bcc 2953 }
9dee1474 2954
ee01d542 2955 return nft_delchain(&ctx);
96518518
PM		 2956}
2957
96518518
PM		 2958/*
2959 * Expressions
2960 */
2961
2962/**
ef1f7df9 2963 * nft_register_expr - register nf_tables expr type
3db86c39 2964 * @type: expr type
96518518 2965 *
ef1f7df9 2966 * Registers the expr type for use with nf_tables. Returns zero on
96518518
PM		 2967 * success or a negative errno code otherwise.
2968 */
ef1f7df9 2969int nft_register_expr(struct nft_expr_type *type)
96518518
PM		 2970{
2971 nfnl_lock(NFNL_SUBSYS_NFTABLES);
758dbcec 2972 if (type->family == NFPROTO_UNSPEC)
e688a7f8 2973 list_add_tail_rcu(&type->list, &nf_tables_expressions);
758dbcec 2974 else
e688a7f8 2975 list_add_rcu(&type->list, &nf_tables_expressions);
96518518
PM		 2976 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2977 return 0;
2978}
2979EXPORT_SYMBOL_GPL(nft_register_expr);
2980
2981/**
ef1f7df9 2982 * nft_unregister_expr - unregister nf_tables expr type
3db86c39 2983 * @type: expr type
96518518 2984 *
ef1f7df9 2985 * Unregisters the expr typefor use with nf_tables.
96518518 2986 */
ef1f7df9 2987void nft_unregister_expr(struct nft_expr_type *type)
96518518
PM		 2988{
2989 nfnl_lock(NFNL_SUBSYS_NFTABLES);
e688a7f8 2990 list_del_rcu(&type->list);
96518518
PM		 2991 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2992}
2993EXPORT_SYMBOL_GPL(nft_unregister_expr);
2994
64d46806
PM		 2995static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2996 struct nlattr *nla)
96518518 2997{
9cff126f 2998 const struct nft_expr_type *type, *candidate = NULL;
96518518 2999
ef1f7df9 3000 list_for_each_entry(type, &nf_tables_expressions, list) {
9cff126f
PNA		 3001 if (!nla_strcmp(nla, type->name)) {
3002 if (!type->family && !candidate)
3003 candidate = type;
3004 else if (type->family == family)
3005 candidate = type;
3006 }
96518518 3007 }
9cff126f 3008 return candidate;
96518518
PM		 3009}
3010
b9c04ae7
PNA		 3011#ifdef CONFIG_MODULES
3012static int nft_expr_type_request_module(struct net *net, u8 family,
3013 struct nlattr *nla)
3014{
eb014de4
PNA		 3015 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
3016 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
b9c04ae7
PNA		 3017 return -EAGAIN;
3018
3019 return 0;
3020}
3021#endif
3022
452238e8
FW		 3023static const struct nft_expr_type *nft_expr_type_get(struct net *net,
3024 u8 family,
64d46806 3025 struct nlattr *nla)
96518518 3026{
ef1f7df9 3027 const struct nft_expr_type *type;
96518518
PM		 3028
3029 if (nla == NULL)
3030 return ERR_PTR(-EINVAL);
3031
64d46806 3032 type = __nft_expr_type_get(family, nla);
ef1f7df9
PM		 3033 if (type != NULL && try_module_get(type->owner))
3034 return type;
96518518 3035
f102d66b 3036 lockdep_nfnl_nft_mutex_not_held();
96518518 3037#ifdef CONFIG_MODULES
ef1f7df9 3038 if (type == NULL) {
b9c04ae7 3039 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
64d46806
PM		 3040 return ERR_PTR(-EAGAIN);
3041
eb014de4
PNA		 3042 if (nft_request_module(net, "nft-expr-%.*s",
3043 nla_len(nla),
3044 (char *)nla_data(nla)) == -EAGAIN)
96518518
PM		 3045 return ERR_PTR(-EAGAIN);
3046 }
3047#endif
3048 return ERR_PTR(-ENOENT);
3049}
3050
3051static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
9332d27d
FW		 3052 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
3053 .len = NFT_MODULE_AUTOLOAD_LIMIT },
96518518
PM		 3054 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
3055};
3056
3057static int nf_tables_fill_expr_info(struct sk_buff *skb,
8daa8fde 3058 const struct nft_expr *expr, bool reset)
96518518 3059{
ef1f7df9 3060 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
96518518
PM		 3061 goto nla_put_failure;
3062
3063 if (expr->ops->dump) {
ae0be8de
MK		 3064 struct nlattr *data = nla_nest_start_noflag(skb,
3065 NFTA_EXPR_DATA);
96518518
PM		 3066 if (data == NULL)
3067 goto nla_put_failure;
8daa8fde 3068 if (expr->ops->dump(skb, expr, reset) < 0)
96518518
PM		 3069 goto nla_put_failure;
3070 nla_nest_end(skb, data);
3071 }
3072
3073 return skb->len;
3074
3075nla_put_failure:
3076 return -1;
3077};
3078
0b2d8a7b 3079int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
8daa8fde 3080 const struct nft_expr *expr, bool reset)
0b2d8a7b
PM		 3081{
3082 struct nlattr *nest;
3083
ae0be8de 3084 nest = nla_nest_start_noflag(skb, attr);
0b2d8a7b
PM		 3085 if (!nest)
3086 goto nla_put_failure;
8daa8fde 3087 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
0b2d8a7b
PM		 3088 goto nla_put_failure;
3089 nla_nest_end(skb, nest);
3090 return 0;
3091
3092nla_put_failure:
3093 return -1;
3094}
3095
96518518
PM		 3096struct nft_expr_info {
3097 const struct nft_expr_ops *ops;
83d9dcba 3098 const struct nlattr *attr;
ef1f7df9 3099 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
96518518
PM		 3100};
3101
0ca743a5
PNA		 3102static int nf_tables_expr_parse(const struct nft_ctx *ctx,
3103 const struct nlattr *nla,
96518518
PM		 3104 struct nft_expr_info *info)
3105{
ef1f7df9 3106 const struct nft_expr_type *type;
96518518 3107 const struct nft_expr_ops *ops;
ef1f7df9 3108 struct nlattr *tb[NFTA_EXPR_MAX + 1];
96518518
PM		 3109 int err;
3110
8cb08174
JB		 3111 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3112 nft_expr_policy, NULL);
96518518
PM		 3113 if (err < 0)
3114 return err;
3115
452238e8 3116 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
ef1f7df9
PM		 3117 if (IS_ERR(type))
3118 return PTR_ERR(type);
3119
3120 if (tb[NFTA_EXPR_DATA]) {
8cb08174
JB		 3121 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3122 tb[NFTA_EXPR_DATA],
3123 type->policy, NULL);
ef1f7df9
PM		 3124 if (err < 0)
3125 goto err1;
3126 } else
3127 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
3128
3129 if (type->select_ops != NULL) {
0ca743a5
PNA		 3130 ops = type->select_ops(ctx,
3131 (const struct nlattr * const *)info->tb);
ef1f7df9
PM		 3132 if (IS_ERR(ops)) {
3133 err = PTR_ERR(ops);
0ef1efd1
PNA		 3134#ifdef CONFIG_MODULES
3135 if (err == -EAGAIN)
eb014de4
PNA		 3136 if (nft_expr_type_request_module(ctx->net,
3137 ctx->family,
3138 tb[NFTA_EXPR_NAME]) != -EAGAIN)
3139 err = -ENOENT;
0ef1efd1 3140#endif
ef1f7df9
PM		 3141 goto err1;
3142 }
3143 } else
3144 ops = type->ops;
3145
83d9dcba 3146 info->attr = nla;
96518518 3147 info->ops = ops;
83d9dcba 3148
96518518 3149 return 0;
ef1f7df9
PM		 3150
3151err1:
3152 module_put(type->owner);
3153 return err;
96518518
PM		 3154}
3155
3a07327d
PNA		 3156int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
3157 struct nft_expr_info *info)
3158{
3159 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3160 const struct nft_expr_type *type;
3161 int err;
3162
3163 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3164 nft_expr_policy, NULL);
3165 if (err < 0)
3166 return err;
3167
505ce063 3168 if (!tb[NFTA_EXPR_DATA] || !tb[NFTA_EXPR_NAME])
3a07327d
PNA		 3169 return -EINVAL;
3170
3171 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
98cbc40e
DC		 3172 if (!type)
3173 return -ENOENT;
3a07327d
PNA		 3174
3175 if (!type->inner_ops)
3176 return -EOPNOTSUPP;
3177
3178 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3179 tb[NFTA_EXPR_DATA],
3180 type->policy, NULL);
3181 if (err < 0)
3182 goto err_nla_parse;
3183
3184 info->attr = nla;
3185 info->ops = type->inner_ops;
3186
3187 return 0;
3188
3189err_nla_parse:
3190 return err;
3191}
3192
96518518 3193static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 3194 const struct nft_expr_info *expr_info,
96518518
PM		 3195 struct nft_expr *expr)
3196{
7dab8ee3 3197 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 3198 int err;
3199
3200 expr->ops = ops;
3201 if (ops->init) {
7dab8ee3 3202 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 3203 if (err < 0)
3204 goto err1;
3205 }
3206
96518518 3207 return 0;
96518518
PM		 3208err1:
3209 expr->ops = NULL;
3210 return err;
3211}
3212
62472bce
PM		 3213static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
3214 struct nft_expr *expr)
96518518 3215{
3f3a390d
PNA		 3216 const struct nft_expr_type *type = expr->ops->type;
3217
96518518 3218 if (expr->ops->destroy)
62472bce 3219 expr->ops->destroy(ctx, expr);
3f3a390d 3220 module_put(type->owner);
96518518
PM		 3221}
3222
795a6d6b
PNA		 3223static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
3224 const struct nlattr *nla)
0b2d8a7b 3225{
7dab8ee3 3226 struct nft_expr_info expr_info;
0b2d8a7b 3227 struct nft_expr *expr;
b8e20400 3228 struct module *owner;
0b2d8a7b
PM		 3229 int err;
3230
7dab8ee3 3231 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 3232 if (err < 0)
52077804
PNA		 3233 goto err_expr_parse;
3234
3235 err = -EOPNOTSUPP;
3236 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
3237 goto err_expr_stateful;
0b2d8a7b
PM		 3238
3239 err = -ENOMEM;
33758c89 3240 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 3241 if (expr == NULL)
52077804 3242 goto err_expr_stateful;
0b2d8a7b 3243
7dab8ee3 3244 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 3245 if (err < 0)
52077804 3246 goto err_expr_new;
0b2d8a7b
PM		 3247
3248 return expr;
52077804 3249err_expr_new:
6cafaf47 3250 kfree(expr);
52077804 3251err_expr_stateful:
7dab8ee3
PNA		 3252 owner = expr_info.ops->type->owner;
3253 if (expr_info.ops->type->release_ops)
3254 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 3255
3256 module_put(owner);
52077804 3257err_expr_parse:
0b2d8a7b
PM		 3258 return ERR_PTR(err);
3259}
3260
c604cc69
PNA		 3261int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
3262{
3263 int err;
3264
3265 if (src->ops->clone) {
3266 dst->ops = src->ops;
3267 err = src->ops->clone(dst, src);
3268 if (err < 0)
3269 return err;
3270 } else {
3271 memcpy(dst, src, src->ops->size);
3272 }
3273
3274 __module_get(src->ops->type->owner);
3275
3276 return 0;
3277}
3278
0b2d8a7b
PM		 3279void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
3280{
3281 nf_tables_expr_destroy(ctx, expr);
3282 kfree(expr);
3283}
3284
96518518
PM		 3285/*
3286 * Rules
3287 */
3288
cac20fcd
PNA		 3289static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
3290 u64 handle)
96518518
PM		 3291{
3292 struct nft_rule *rule;
3293
3294 // FIXME: this sucks
d9adf22a 3295 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 3296 if (handle == rule->handle)
3297 return rule;
3298 }
3299
3300 return ERR_PTR(-ENOENT);
3301}
3302
cac20fcd
PNA		 3303static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3304 const struct nlattr *nla)
96518518
PM		 3305{
3306 if (nla == NULL)
3307 return ERR_PTR(-EINVAL);
3308
cac20fcd 3309 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 3310}
3311
3312static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 3313 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3314 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 3315 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3316 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3317 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
013714bf 3318 [NFTA_RULE_EXPRESSIONS] = NLA_POLICY_NESTED_ARRAY(nft_expr_policy),
0ca743a5 3319 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 3320 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 3321 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3322 .len = NFT_USERDATA_MAXLEN },
467697d2 3323 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 3324 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 3325 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 3326};
3327
84d7fce6
PNA		 3328static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3329 u32 portid, u32 seq, int event,
3330 u32 flags, int family,
96518518
PM		 3331 const struct nft_table *table,
3332 const struct nft_chain *chain,
8daa8fde
PS		 3333 const struct nft_rule *rule, u64 handle,
3334 bool reset)
96518518
PM		 3335{
3336 struct nlmsghdr *nlh;
96518518
PM		 3337 const struct nft_expr *expr, *next;
3338 struct nlattr *list;
dedb67c4 3339 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3340
19c28b13
PNA		 3341 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3342 nft_base_seq(net));
3343 if (!nlh)
96518518
PM		 3344 goto nla_put_failure;
3345
96518518
PM		 3346 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3347 goto nla_put_failure;
3348 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3349 goto nla_put_failure;
b46f6ded
ND		 3350 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3351 NFTA_RULE_PAD))
96518518
PM		 3352 goto nla_put_failure;
3353
e189ae16
PNA		 3354 if (event != NFT_MSG_DELRULE && handle) {
3355 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3356 NFTA_RULE_PAD))
5e948466
EL		 3357 goto nla_put_failure;
3358 }
3359
b72920f6
PNA		 3360 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3361 nft_flow_rule_stats(chain, rule);
3362
ae0be8de 3363 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3364 if (list == NULL)
3365 goto nla_put_failure;
3366 nft_rule_for_each_expr(expr, next, rule) {
8daa8fde 3367 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
96518518 3368 goto nla_put_failure;
96518518
PM		 3369 }
3370 nla_nest_end(skb, list);
3371
86f1ec32
PM		 3372 if (rule->udata) {
3373 struct nft_userdata *udata = nft_userdata(rule);
3374 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3375 udata->data) < 0)
3376 goto nla_put_failure;
3377 }
0768b3b3 3378
053c095a
JB		 3379 nlmsg_end(skb, nlh);
3380 return 0;
96518518
PM		 3381
3382nla_put_failure:
3383 nlmsg_trim(skb, nlh);
3384 return -1;
3385}
3386
25e94a99
PNA		 3387static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3388 const struct nft_rule *rule, int event)
96518518 3389{
d59d2f82 3390 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3391 const struct nft_rule *prule;
96518518 3392 struct sk_buff *skb;
e189ae16
PNA		 3393 u64 handle = 0;
3394 u16 flags = 0;
96518518
PM		 3395 int err;
3396
128ad332
PNA		 3397 if (!ctx->report &&
3398 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3399 return;
96518518 3400
96518518
PM		 3401 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3402 if (skb == NULL)
3403 goto err;
3404
e189ae16
PNA		 3405 if (event == NFT_MSG_NEWRULE &&
3406 !list_is_first(&rule->list, &ctx->chain->rules) &&
3407 !list_is_last(&rule->list, &ctx->chain->rules)) {
3408 prule = list_prev_entry(rule, list);
3409 handle = prule->handle;
3410 }
3411 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3412 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3413 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3414 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3415
84d7fce6 3416 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16 3417 event, flags, ctx->family, ctx->table,
8daa8fde 3418 ctx->chain, rule, handle, false);
96518518
PM		 3419 if (err < 0) {
3420 kfree_skb(skb);
3421 goto err;
3422 }
3423
0854db2a 3424 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3425 return;
96518518 3426err:
25e94a99 3427 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3428}
3429
ea078ae9
PS		 3430static void audit_log_rule_reset(const struct nft_table *table,
3431 unsigned int base_seq,
3432 unsigned int nentries)
3433{
3434 char *buf = kasprintf(GFP_ATOMIC, "%s:%u",
3435 table->name, base_seq);
3436
3437 audit_log_nfcfg(buf, table->family, nentries,
3438 AUDIT_NFT_OP_RULE_RESET, GFP_ATOMIC);
3439 kfree(buf);
3440}
3441
6e1f760e 3442struct nft_rule_dump_ctx {
8194d599 3443 unsigned int s_idx;
e46abbcc 3444 char *table;
b7263e07 3445 char *chain;
405c8fd6 3446 bool reset;
6e1f760e
PNA		 3447};
3448
241faece
PS		 3449static int __nf_tables_dump_rules(struct sk_buff *skb,
3450 unsigned int *idx,
3451 struct netlink_callback *cb,
3452 const struct nft_table *table,
405c8fd6 3453 const struct nft_chain *chain)
241faece 3454{
99ab9f84 3455 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
241faece 3456 struct net *net = sock_net(skb->sk);
2c82c7e7 3457 const struct nft_rule *rule, *prule;
7fb818f2
PS		 3458 unsigned int entries = 0;
3459 int ret = 0;
e189ae16 3460 u64 handle;
241faece 3461
2c82c7e7 3462 prule = NULL;
241faece
PS		 3463 list_for_each_entry_rcu(rule, &chain->rules, list) {
3464 if (!nft_is_active(net, rule))
2c82c7e7 3465 goto cont_skip;
8194d599 3466 if (*idx < ctx->s_idx)
241faece 3467 goto cont;
e189ae16
PNA		 3468 if (prule)
3469 handle = prule->handle;
3470 else
3471 handle = 0;
3472
241faece
PS		 3473 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3474 cb->nlh->nlmsg_seq,
3475 NFT_MSG_NEWRULE,
3476 NLM_F_MULTI | NLM_F_APPEND,
3477 table->family,
405c8fd6 3478 table, chain, rule, handle, ctx->reset) < 0) {
7fb818f2
PS		 3479 ret = 1;
3480 break;
3481 }
3482 entries++;
241faece
PS		 3483 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3484cont:
2c82c7e7
FW		 3485 prule = rule;
3486cont_skip:
241faece
PS		 3487 (*idx)++;
3488 }
9b5ba5c9 3489
405c8fd6 3490 if (ctx->reset && entries)
7fb818f2 3491 audit_log_rule_reset(table, cb->seq, entries);
9b5ba5c9 3492
7fb818f2 3493 return ret;
241faece
PS		 3494}
3495
96518518
PM		 3496static int nf_tables_dump_rules(struct sk_buff *skb,
3497 struct netlink_callback *cb)
3498{
3499 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
99ab9f84 3500 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
241faece 3501 struct nft_table *table;
96518518 3502 const struct nft_chain *chain;
241faece 3503 unsigned int idx = 0;
99633ab2 3504 struct net *net = sock_net(skb->sk);
96518518 3505 int family = nfmsg->nfgen_family;
0854db2a 3506 struct nftables_pernet *nft_net;
96518518 3507
e688a7f8 3508 rcu_read_lock();
d59d2f82 3509 nft_net = nft_pernet(net);
34002783 3510 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3511
0854db2a 3512 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3513 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3514 continue;
3515
afed2b54 3516 if (ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3517 continue;
3518
afed2b54 3519 if (ctx->table && ctx->chain) {
241faece 3520 struct rhlist_head *list, *tmp;
6e1f760e 3521
241faece
PS		 3522 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3523 nft_chain_ht_params);
3524 if (!list)
3525 goto done;
3526
3527 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3528 if (!nft_is_active(net, chain))
3529 continue;
3530 __nf_tables_dump_rules(skb, &idx,
405c8fd6 3531 cb, table, chain);
241faece 3532 break;
96518518 3533 }
241faece 3534 goto done;
96518518 3535 }
241faece
PS		 3536
3537 list_for_each_entry_rcu(chain, &table->chains, list) {
8daa8fde 3538 if (__nf_tables_dump_rules(skb, &idx,
405c8fd6 3539 cb, table, chain))
241faece
PS		 3540 goto done;
3541 }
3542
afed2b54 3543 if (ctx->table)
241faece 3544 break;
96518518
PM		 3545 }
3546done:
e688a7f8 3547 rcu_read_unlock();
310529e6 3548
8194d599 3549 ctx->s_idx = idx;
96518518
PM		 3550 return skb->len;
3551}
3552
3cb03edb
PS		 3553static int nf_tables_dumpreset_rules(struct sk_buff *skb,
3554 struct netlink_callback *cb)
3555{
3556 struct nftables_pernet *nft_net = nft_pernet(sock_net(skb->sk));
3557 int ret;
3558
3559 /* Mutex is held is to prevent that two concurrent dump-and-reset calls
3560 * do not underrun counters and quotas. The commit_mutex is used for
3561 * the lack a better lock, this is not transaction path.
3562 */
3563 mutex_lock(&nft_net->commit_mutex);
3564 ret = nf_tables_dump_rules(skb, cb);
3565 mutex_unlock(&nft_net->commit_mutex);
3566
3567 return ret;
3568}
3569
90fd131a
FW		 3570static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3571{
99ab9f84 3572 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
90fd131a 3573 const struct nlattr * const *nla = cb->data;
90fd131a 3574
99ab9f84 3575 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
90fd131a 3576
afed2b54
PS		 3577 if (nla[NFTA_RULE_TABLE]) {
3578 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE], GFP_ATOMIC);
99ab9f84 3579 if (!ctx->table)
afed2b54 3580 return -ENOMEM;
afed2b54
PS		 3581 }
3582 if (nla[NFTA_RULE_CHAIN]) {
3583 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN], GFP_ATOMIC);
3584 if (!ctx->chain) {
3585 kfree(ctx->table);
afed2b54 3586 return -ENOMEM;
90fd131a
FW		 3587 }
3588 }
90fd131a
FW		 3589 return 0;
3590}
3591
3cb03edb
PS		 3592static int nf_tables_dumpreset_rules_start(struct netlink_callback *cb)
3593{
3594 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
3595
3596 ctx->reset = true;
3597
3598 return nf_tables_dump_rules_start(cb);
3599}
3600
6e1f760e
PNA		 3601static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3602{
99ab9f84 3603 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
e46abbcc 3604
afed2b54
PS		 3605 kfree(ctx->table);
3606 kfree(ctx->chain);
6e1f760e
PNA		 3607 return 0;
3608}
3609
d9adf22a 3610/* called with rcu_read_lock held */
1578c328
PS		 3611static struct sk_buff *
3612nf_tables_getrule_single(u32 portid, const struct nfnl_info *info,
3613 const struct nlattr * const nla[], bool reset)
96518518 3614{
797d4980
PNA		 3615 struct netlink_ext_ack *extack = info->extack;
3616 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3617 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3618 const struct nft_chain *chain;
3619 const struct nft_rule *rule;
797d4980 3620 struct net *net = info->net;
1b2470e5 3621 struct nft_table *table;
96518518 3622 struct sk_buff *skb2;
96518518
PM		 3623 int err;
3624
6001a930 3625 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3626 if (IS_ERR(table)) {
3627 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
1578c328 3628 return ERR_CAST(table);
36dd1bcc 3629 }
96518518 3630
f102d66b 3631 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3632 if (IS_ERR(chain)) {
3633 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
1578c328 3634 return ERR_CAST(chain);
36dd1bcc 3635 }
96518518 3636
cac20fcd 3637 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3638 if (IS_ERR(rule)) {
3639 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
1578c328 3640 return ERR_CAST(rule);
36dd1bcc 3641 }
96518518 3642
d9adf22a 3643 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518 3644 if (!skb2)
1578c328 3645 return ERR_PTR(-ENOMEM);
8daa8fde 3646
88773930 3647 err = nf_tables_fill_rule_info(skb2, net, portid,
797d4980 3648 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
8daa8fde 3649 family, table, chain, rule, 0, reset);
1578c328
PS		 3650 if (err < 0) {
3651 kfree_skb(skb2);
3652 return ERR_PTR(err);
3653 }
3654
3655 return skb2;
3656}
3657
3658static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3659 const struct nlattr * const nla[])
3660{
1578c328
PS		 3661 u32 portid = NETLINK_CB(skb).portid;
3662 struct net *net = info->net;
3663 struct sk_buff *skb2;
1578c328
PS		 3664
3665 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3666 struct netlink_dump_control c = {
3667 .start= nf_tables_dump_rules_start,
3668 .dump = nf_tables_dump_rules,
3669 .done = nf_tables_dump_rules_done,
3670 .module = THIS_MODULE,
3671 .data = (void *)nla,
3672 };
3673
3674 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3675 }
3676
3cb03edb 3677 skb2 = nf_tables_getrule_single(portid, info, nla, false);
1578c328
PS		 3678 if (IS_ERR(skb2))
3679 return PTR_ERR(skb2);
96518518 3680
3cb03edb
PS		 3681 return nfnetlink_unicast(skb2, net, portid);
3682}
3683
3684static int nf_tables_getrule_reset(struct sk_buff *skb,
3685 const struct nfnl_info *info,
3686 const struct nlattr * const nla[])
3687{
3688 struct nftables_pernet *nft_net = nft_pernet(info->net);
3689 u32 portid = NETLINK_CB(skb).portid;
3690 struct net *net = info->net;
3691 struct sk_buff *skb2;
3692 char *buf;
3693
3694 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3695 struct netlink_dump_control c = {
3696 .start= nf_tables_dumpreset_rules_start,
3697 .dump = nf_tables_dumpreset_rules,
3698 .done = nf_tables_dump_rules_done,
3699 .module = THIS_MODULE,
3700 .data = (void *)nla,
3701 };
3702
3703 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3704 }
3705
3706 if (!try_module_get(THIS_MODULE))
3707 return -EINVAL;
3708 rcu_read_unlock();
3709 mutex_lock(&nft_net->commit_mutex);
3710 skb2 = nf_tables_getrule_single(portid, info, nla, true);
3711 mutex_unlock(&nft_net->commit_mutex);
3712 rcu_read_lock();
3713 module_put(THIS_MODULE);
3714
3715 if (IS_ERR(skb2))
3716 return PTR_ERR(skb2);
ea078ae9 3717
88773930
PS		 3718 buf = kasprintf(GFP_ATOMIC, "%.*s:%u",
3719 nla_len(nla[NFTA_RULE_TABLE]),
3720 (char *)nla_data(nla[NFTA_RULE_TABLE]),
3721 nft_net->base_seq);
3722 audit_log_nfcfg(buf, info->nfmsg->nfgen_family, 1,
3723 AUDIT_NFT_OP_RULE_RESET, GFP_ATOMIC);
3724 kfree(buf);
3725
3726 return nfnetlink_unicast(skb2, net, portid);
96518518
PM		 3727}
3728
4bedf9ee 3729void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule)
96518518 3730{
29e38801 3731 struct nft_expr *expr, *next;
96518518
PM		 3732
3733 /*
3734 * Careful: some expressions might not be initialized in case this
3735 * is called on error from nf_tables_newrule().
3736 */
3737 expr = nft_expr_first(rule);
31cc578a 3738 while (nft_expr_more(rule, expr)) {
29e38801 3739 next = nft_expr_next(expr);
62472bce 3740 nf_tables_expr_destroy(ctx, expr);
29e38801 3741 expr = next;
96518518
PM		 3742 }
3743 kfree(rule);
3744}
3745
4bedf9ee 3746static void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3747{
f6ac8585 3748 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3749 nf_tables_rule_destroy(ctx, rule);
3750}
3751
a654de8f
PNA		 3752int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3753{
3754 struct nft_expr *expr, *last;
3755 const struct nft_data *data;
3756 struct nft_rule *rule;
3757 int err;
3758
26b2f552
TY		 3759 if (ctx->level == NFT_JUMP_STACK_SIZE)
3760 return -EMLINK;
3761
a654de8f 3762 list_for_each_entry(rule, &chain->rules, list) {
169384fb
FW		 3763 if (fatal_signal_pending(current))
3764 return -EINTR;
3765
a654de8f
PNA		 3766 if (!nft_is_active_next(ctx->net, rule))
3767 continue;
3768
3769 nft_rule_for_each_expr(expr, last, rule) {
3770 if (!expr->ops->validate)
3771 continue;
3772
3773 err = expr->ops->validate(ctx, expr, &data);
3774 if (err < 0)
3775 return err;
3776 }
3777 }
3778
3779 return 0;
3780}
3781EXPORT_SYMBOL_GPL(nft_chain_validate);
3782
3783static int nft_table_validate(struct net *net, const struct nft_table *table)
3784{
3785 struct nft_chain *chain;
3786 struct nft_ctx ctx = {
3787 .net = net,
3788 .family = table->family,
3789 };
3790 int err;
3791
3792 list_for_each_entry(chain, &table->chains, list) {
3793 if (!nft_is_base_chain(chain))
3794 continue;
3795
3796 ctx.chain = chain;
3797 err = nft_chain_validate(&ctx, chain);
3798 if (err < 0)
3799 return err;
314c8284
FW		 3800
3801 cond_resched();
a654de8f
PNA		 3802 }
3803
3804 return 0;
3805}
3806
d46fc894
PNA		 3807int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
3808 const struct nft_set_iter *iter,
0e1ea651 3809 struct nft_elem_priv *elem_priv)
d46fc894 3810{
0e1ea651 3811 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
d46fc894
PNA		 3812 struct nft_ctx *pctx = (struct nft_ctx *)ctx;
3813 const struct nft_data *data;
3814 int err;
3815
3816 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
3817 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
3818 return 0;
3819
3820 data = nft_set_ext_data(ext);
3821 switch (data->verdict.code) {
3822 case NFT_JUMP:
3823 case NFT_GOTO:
3824 pctx->level++;
3825 err = nft_chain_validate(ctx, data->verdict.chain);
3826 if (err < 0)
3827 return err;
3828 pctx->level--;
3829 break;
3830 default:
3831 break;
3832 }
3833
3834 return 0;
3835}
3836
d46fc894
PNA		 3837int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
3838{
3839 u8 genmask = nft_genmask_next(ctx->net);
3840 struct nft_set_elem_catchall *catchall;
d46fc894
PNA		 3841 struct nft_set_ext *ext;
3842 int ret = 0;
3843
3844 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
3845 ext = nft_set_elem_ext(set, catchall->elem);
3846 if (!nft_set_elem_active(ext, genmask))
3847 continue;
3848
0e1ea651 3849 ret = nft_setelem_validate(ctx, set, NULL, catchall->elem);
d46fc894
PNA		 3850 if (ret < 0)
3851 return ret;
3852 }
3853
3854 return ret;
3855}
3856
75dd48e2 3857static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3858 const struct nft_chain *chain,
75dd48e2
PS		 3859 const struct nlattr *nla);
3860
1081d11b
PNA		 3861#define NFT_RULE_MAXEXPRS 128
3862
7dab8ee3
PNA		 3863static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3864 const struct nlattr * const nla[])
96518518 3865{
7dab8ee3 3866 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3867 struct netlink_ext_ack *extack = info->extack;
3868 unsigned int size, i, n, ulen = 0, usize = 0;
3869 u8 genmask = nft_genmask_next(info->net);
3870 struct nft_rule *rule, *old_rule = NULL;
3871 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3872 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3873 struct nft_flow_rule *flow = NULL;
7dab8ee3 3874 struct net *net = info->net;
7dab8ee3 3875 struct nft_userdata *udata;
96518518
PM		 3876 struct nft_table *table;
3877 struct nft_chain *chain;
7dab8ee3
PNA		 3878 struct nft_trans *trans;
3879 u64 handle, pos_handle;
96518518
PM		 3880 struct nft_expr *expr;
3881 struct nft_ctx ctx;
3882 struct nlattr *tmp;
96518518 3883 int err, rem;
96518518 3884
0854db2a 3885 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3886
6001a930
PNA		 3887 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3888 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3889 if (IS_ERR(table)) {
3890 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3891 return PTR_ERR(table);
36dd1bcc 3892 }
96518518 3893
837830a4
PNA		 3894 if (nla[NFTA_RULE_CHAIN]) {
3895 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3896 genmask);
3897 if (IS_ERR(chain)) {
3898 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3899 return PTR_ERR(chain);
3900 }
d0e2c7de 3901
837830a4 3902 } else if (nla[NFTA_RULE_CHAIN_ID]) {
515ad530
TLSC		 3903 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID],
3904 genmask);
837830a4
PNA		 3905 if (IS_ERR(chain)) {
3906 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3907 return PTR_ERR(chain);
3908 }
3909 } else {
3910 return -EINVAL;
36dd1bcc 3911 }
96518518 3912
0ebc1064
PNA		 3913 if (nft_chain_is_bound(chain))
3914 return -EOPNOTSUPP;
3915
96518518
PM		 3916 if (nla[NFTA_RULE_HANDLE]) {
3917 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3918 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3919 if (IS_ERR(rule)) {
3920 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3921 return PTR_ERR(rule);
36dd1bcc 3922 }
96518518 3923
7dab8ee3 3924 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3925 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3926 return -EEXIST;
36dd1bcc 3927 }
7dab8ee3 3928 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3929 old_rule = rule;
3930 else
3931 return -EOPNOTSUPP;
3932 } else {
7dab8ee3
PNA		 3933 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3934 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3935 return -EINVAL;
3936 handle = nf_tables_alloc_handle(table);
a0a7379e 3937
447750f2
FW		 3938 if (nla[NFTA_RULE_POSITION]) {
3939 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3940 old_rule = __nft_rule_lookup(chain, pos_handle);
3941 if (IS_ERR(old_rule)) {
3942 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3943 return PTR_ERR(old_rule);
3944 }
75dd48e2 3945 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3946 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3947 if (IS_ERR(old_rule)) {
3948 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3949 return PTR_ERR(old_rule);
3950 }
36dd1bcc 3951 }
5e948466
EL		 3952 }
3953
7dab8ee3 3954 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3955
96518518
PM		 3956 n = 0;
3957 size = 0;
3958 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3959 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3960 sizeof(struct nft_expr_info),
3961 GFP_KERNEL);
3962 if (!expr_info)
2a43ecf9
FW		 3963 return -ENOMEM;
3964
96518518
PM		 3965 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3966 err = -EINVAL;
3967 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3968 goto err_release_expr;
96518518 3969 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3970 goto err_release_expr;
7dab8ee3 3971 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3972 if (err < 0) {
3973 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3974 goto err_release_expr;
c781471d 3975 }
7dab8ee3 3976 size += expr_info[n].ops->size;
96518518
PM		 3977 n++;
3978 }
3979 }
9889840f
PM		 3980 /* Check for overflow of dlen field */
3981 err = -EFBIG;
3982 if (size >= 1 << 12)
3c5e4462 3983 goto err_release_expr;
96518518 3984
86f1ec32 3985 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3986 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3987 if (ulen > 0)
3988 usize = sizeof(struct nft_userdata) + ulen;
3989 }
0768b3b3 3990
96518518 3991 err = -ENOMEM;
33758c89 3992 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3993 if (rule == NULL)
3c5e4462 3994 goto err_release_expr;
96518518 3995
889f7ee7 3996 nft_activate_next(net, rule);
0628b123 3997
96518518
PM		 3998 rule->handle = handle;
3999 rule->dlen = size;
86f1ec32 4000 rule->udata = ulen ? 1 : 0;
0768b3b3 4001
86f1ec32
PM		 4002 if (ulen) {
4003 udata = nft_userdata(rule);
4004 udata->len = ulen - 1;
4005 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
4006 }
96518518 4007
96518518
PM		 4008 expr = nft_expr_first(rule);
4009 for (i = 0; i < n; i++) {
7dab8ee3 4010 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 4011 if (err < 0) {
7dab8ee3 4012 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 4013 goto err_release_rule;
83d9dcba 4014 }
a654de8f 4015
7dab8ee3 4016 if (expr_info[i].ops->validate)
00c320f9 4017 nft_validate_state_update(table, NFT_VALIDATE_NEED);
a654de8f 4018
7dab8ee3 4019 expr_info[i].ops = NULL;
96518518
PM		 4020 expr = nft_expr_next(expr);
4021 }
4022
3c5e4462
PNA		 4023 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
4024 flow = nft_flow_rule_create(net, rule);
4025 if (IS_ERR(flow)) {
4026 err = PTR_ERR(flow);
4027 goto err_release_rule;
4028 }
4029 }
4030
1689f259
PNA		 4031 if (!nft_use_inc(&chain->use)) {
4032 err = -EMFILE;
4033 goto err_release_rule;
4034 }
4035
7dab8ee3 4036 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
f15f29fd
PNA		 4037 if (nft_chain_binding(chain)) {
4038 err = -EOPNOTSUPP;
4039 goto err_destroy_flow_rule;
4040 }
4041
2c964c55
PNA		 4042 err = nft_delrule(&ctx, old_rule);
4043 if (err < 0)
4044 goto err_destroy_flow_rule;
4045
ca089878 4046 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 4047 if (trans == NULL) {
4048 err = -ENOMEM;
3c5e4462 4049 goto err_destroy_flow_rule;
569ccae6 4050 }
569ccae6
FW		 4051 list_add_tail_rcu(&rule->list, &old_rule->list);
4052 } else {
c9626a2c
PNA		 4053 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
4054 if (!trans) {
569ccae6 4055 err = -ENOMEM;
3c5e4462 4056 goto err_destroy_flow_rule;
569ccae6
FW		 4057 }
4058
7dab8ee3 4059 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 4060 if (old_rule)
4061 list_add_rcu(&rule->list, &old_rule->list);
4062 else
4063 list_add_tail_rcu(&rule->list, &chain->rules);
4064 } else {
4065 if (old_rule)
4066 list_add_tail_rcu(&rule->list, &old_rule->list);
4067 else
4068 list_add_rcu(&rule->list, &chain->rules);
4069 }
0628b123 4070 }
7dab8ee3 4071 kvfree(expr_info);
96518518 4072
3c5e4462
PNA		 4073 if (flow)
4074 nft_trans_flow_rule(trans) = flow;
4075
00c320f9 4076 if (table->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 4077 return nft_table_validate(net, table);
4078
4079 return 0;
3c5e4462
PNA		 4080
4081err_destroy_flow_rule:
1689f259 4082 nft_use_dec_restore(&chain->use);
4ca041f9
CIK		 4083 if (flow)
4084 nft_flow_rule_destroy(flow);
3c5e4462 4085err_release_rule:
26b5a571 4086 nft_rule_expr_deactivate(&ctx, rule, NFT_TRANS_PREPARE_ERROR);
1240eb93 4087 nf_tables_rule_destroy(&ctx, rule);
3c5e4462 4088err_release_expr:
96518518 4089 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 4090 if (expr_info[i].ops) {
4091 module_put(expr_info[i].ops->type->owner);
4092 if (expr_info[i].ops->type->release_ops)
4093 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 4094 }
96518518 4095 }
7dab8ee3
PNA		 4096 kvfree(expr_info);
4097
96518518
PM		 4098 return err;
4099}
4100
1a94e38d 4101static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 4102 const struct nft_chain *chain,
1a94e38d
PNA		 4103 const struct nlattr *nla)
4104{
d59d2f82 4105 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 4106 u32 id = ntohl(nla_get_be32(nla));
4107 struct nft_trans *trans;
4108
0854db2a 4109 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d 4110 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 4111 trans->ctx.chain == chain &&
1a94e38d 4112 id == nft_trans_rule_id(trans))
e3c361b8 4113 return nft_trans_rule(trans);
1a94e38d
PNA		 4114 }
4115 return ERR_PTR(-ENOENT);
4116}
4117
7dab8ee3
PNA		 4118static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
4119 const struct nlattr * const nla[])
96518518 4120{
7dab8ee3 4121 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 4122 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4123 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 4124 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 4125 struct net *net = info->net;
4126 struct nft_table *table;
cf9dc09d 4127 struct nft_rule *rule;
0628b123 4128 struct nft_ctx ctx;
ef4b65e5 4129 int err = 0;
96518518 4130
6001a930
PNA		 4131 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
4132 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4133 if (IS_ERR(table)) {
4134 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 4135 return PTR_ERR(table);
36dd1bcc 4136 }
96518518 4137
cf9dc09d 4138 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 4139 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
4140 genmask);
36dd1bcc 4141 if (IS_ERR(chain)) {
1fb7696a 4142 if (PTR_ERR(chain) == -ENOENT &&
f80a612d
FFM		 4143 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4144 return 0;
4145
36dd1bcc 4146 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 4147 return PTR_ERR(chain);
36dd1bcc 4148 }
f15f29fd 4149 if (nft_chain_binding(chain))
d0e2c7de 4150 return -EOPNOTSUPP;
cf9dc09d 4151 }
96518518 4152
7dab8ee3 4153 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 4154
cf9dc09d
PNA		 4155 if (chain) {
4156 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 4157 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc 4158 if (IS_ERR(rule)) {
f80a612d
FFM		 4159 if (PTR_ERR(rule) == -ENOENT &&
4160 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4161 return 0;
4162
36dd1bcc 4163 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 4164 return PTR_ERR(rule);
36dd1bcc 4165 }
96518518 4166
1a94e38d
PNA		 4167 err = nft_delrule(&ctx, rule);
4168 } else if (nla[NFTA_RULE_ID]) {
36d5b291 4169 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 4170 if (IS_ERR(rule)) {
4171 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 4172 return PTR_ERR(rule);
36dd1bcc 4173 }
1a94e38d 4174
5e266fe7 4175 err = nft_delrule(&ctx, rule);
cf9dc09d 4176 } else {
ce24b721 4177 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 4178 }
4179 } else {
4180 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 4181 if (!nft_is_active_next(net, chain))
4182 continue;
f15f29fd 4183 if (nft_chain_binding(chain))
6eaf41e8 4184 continue;
664b0f8c 4185
cf9dc09d 4186 ctx.chain = chain;
ce24b721 4187 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 4188 if (err < 0)
4189 break;
4190 }
4191 }
4192
4193 return err;
4194}
4195
20a69341
PM		 4196/*
4197 * Sets
4198 */
e32a4dc6
FW		 4199static const struct nft_set_type *nft_set_types[] = {
4200 &nft_set_hash_fast_type,
4201 &nft_set_hash_type,
4202 &nft_set_rhash_type,
4203 &nft_set_bitmap_type,
4204 &nft_set_rbtree_type,
e6abef61 4205#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 4206 &nft_set_pipapo_avx2_type,
4207#endif
e32a4dc6
FW		 4208 &nft_set_pipapo_type,
4209};
20a69341 4210
2b664957 4211#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 4212 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
4213 NFT_SET_EVAL)
2b664957 4214
71cc0873 4215static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 4216{
71cc0873 4217 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 4218}
4219
c50b960c
PM		 4220/*
4221 * Select a set implementation based on the data characteristics and the
4222 * given policy. The total memory use might not be known if no size is
4223 * given, in that case the amount of memory per element is used.
4224 */
4225static const struct nft_set_ops *
2b664957
PNA		 4226nft_select_set_ops(const struct nft_ctx *ctx,
4227 const struct nlattr * const nla[],
bed4a63e 4228 const struct nft_set_desc *desc)
20a69341 4229{
d59d2f82 4230 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 4231 const struct nft_set_ops *ops, *bops;
4232 struct nft_set_estimate est, best;
2b664957
PNA		 4233 const struct nft_set_type *type;
4234 u32 flags = 0;
e32a4dc6 4235 int i;
20a69341 4236
0854db2a 4237 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 4238 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 4239
2b664957
PNA		 4240 if (nla[NFTA_SET_FLAGS] != NULL)
4241 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 4242
55af753c
PNA		 4243 bops = NULL;
4244 best.size = ~0;
4245 best.lookup = ~0;
0b5a7874 4246 best.space = ~0;
c50b960c 4247
e32a4dc6
FW		 4248 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
4249 type = nft_set_types[i];
71cc0873 4250 ops = &type->ops;
2b664957 4251
71cc0873 4252 if (!nft_set_ops_candidate(type, flags))
20a69341 4253 continue;
2b664957 4254 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 4255 continue;
4256
bed4a63e 4257 switch (desc->policy) {
c50b960c 4258 case NFT_SET_POL_PERFORMANCE:
55af753c 4259 if (est.lookup < best.lookup)
c50b960c 4260 break;
644e334e
PNA		 4261 if (est.lookup == best.lookup &&
4262 est.space < best.space)
4263 break;
c50b960c
PM		 4264 continue;
4265 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 4266 if (!desc->size) {
4267 if (est.space < best.space)
4268 break;
4269 if (est.space == best.space &&
4270 est.lookup < best.lookup)
4271 break;
4f2921ca 4272 } else if (est.size < best.size || !bops) {
c50b960c 4273 break;
0b5a7874 4274 }
c50b960c
PM		 4275 continue;
4276 default:
4277 break;
4278 }
4279
c50b960c
PM		 4280 bops = ops;
4281 best = est;
20a69341
PM		 4282 }
4283
c50b960c
PM		 4284 if (bops != NULL)
4285 return bops;
4286
20a69341
PM		 4287 return ERR_PTR(-EOPNOTSUPP);
4288}
4289
4290static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 4291 [NFTA_SET_TABLE] = { .type = NLA_STRING,
4292 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 4293 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 4294 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 4295 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
4296 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
4297 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
4298 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
4299 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 4300 [NFTA_SET_POLICY] = { .type = NLA_U32 },
4301 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 4302 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 4303 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
4304 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 4305 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
4306 .len = NFT_USERDATA_MAXLEN },
8aeff920 4307 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 4308 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 4309 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
013714bf
PS		 4310 [NFTA_SET_EXPRESSIONS] = NLA_POLICY_NESTED_ARRAY(nft_expr_policy),
4311};
4312
4313static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4314 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
c50b960c
PM		 4315};
4316
4317static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
4318 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
013714bf 4319 [NFTA_SET_DESC_CONCAT] = NLA_POLICY_NESTED_ARRAY(nft_concat_policy),
20a69341
PM		 4320};
4321
cac20fcd
PNA		 4322static struct nft_set *nft_set_lookup(const struct nft_table *table,
4323 const struct nlattr *nla, u8 genmask)
20a69341
PM		 4324{
4325 struct nft_set *set;
4326
4327 if (nla == NULL)
4328 return ERR_PTR(-EINVAL);
4329
d9adf22a 4330 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 4331 if (!nla_strcmp(nla, set->name) &&
4332 nft_active_genmask(set, genmask))
20a69341
PM		 4333 return set;
4334 }
4335 return ERR_PTR(-ENOENT);
4336}
4337
cac20fcd
PNA		 4338static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
4339 const struct nlattr *nla,
4340 u8 genmask)
3ecbfd65
HS		 4341{
4342 struct nft_set *set;
4343
3ecbfd65
HS		 4344 list_for_each_entry(set, &table->sets, list) {
4345 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
4346 nft_active_genmask(set, genmask))
4347 return set;
4348 }
4349 return ERR_PTR(-ENOENT);
4350}
4351
cac20fcd 4352static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 4353 const struct nft_table *table,
cac20fcd 4354 const struct nlattr *nla, u8 genmask)
958bee14 4355{
d59d2f82 4356 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 4357 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 4358 struct nft_trans *trans;
958bee14 4359
0854db2a 4360 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 4361 if (trans->msg_type == NFT_MSG_NEWSET) {
4362 struct nft_set *set = nft_trans_set(trans);
37a9cc52 4363
9c7f96fd 4364 if (id == nft_trans_set_id(trans) &&
470ee20e 4365 set->table == table &&
9c7f96fd
AK		 4366 nft_active_genmask(set, genmask))
4367 return set;
4368 }
958bee14
PNA		 4369 }
4370 return ERR_PTR(-ENOENT);
4371}
c7a72e3f 4372
10659cba
PNA		 4373struct nft_set *nft_set_lookup_global(const struct net *net,
4374 const struct nft_table *table,
4375 const struct nlattr *nla_set_name,
4376 const struct nlattr *nla_set_id,
4377 u8 genmask)
c7a72e3f
PNA		 4378{
4379 struct nft_set *set;
4380
cac20fcd 4381 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 4382 if (IS_ERR(set)) {
4383 if (!nla_set_id)
4384 return set;
4385
470ee20e 4386 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 4387 }
4388 return set;
4389}
10659cba 4390EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 4391
20a69341
PM		 4392static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
4393 const char *name)
4394{
4395 const struct nft_set *i;
4396 const char *p;
4397 unsigned long *inuse;
60eb1894 4398 unsigned int n = 0, min = 0;
20a69341 4399
38745490 4400 p = strchr(name, '%');
20a69341
PM		 4401 if (p != NULL) {
4402 if (p[1] != 'd' || strchr(p + 2, '%'))
4403 return -EINVAL;
4404
4405 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
4406 if (inuse == NULL)
4407 return -ENOMEM;
60eb1894 4408cont:
20a69341 4409 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 4410 int tmp;
4411
271c5ca8 4412 if (!nft_is_active_next(ctx->net, i))
37a9cc52 4413 continue;
14662917 4414 if (!sscanf(i->name, name, &tmp))
20a69341 4415 continue;
60eb1894 4416 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 4417 continue;
14662917 4418
60eb1894 4419 set_bit(tmp - min, inuse);
20a69341
PM		 4420 }
4421
53b70287 4422 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 4423 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
4424 min += BITS_PER_BYTE * PAGE_SIZE;
4425 memset(inuse, 0, PAGE_SIZE);
4426 goto cont;
4427 }
20a69341
PM		 4428 free_page((unsigned long)inuse);
4429 }
4430
33758c89 4431 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 4432 if (!set->name)
4433 return -ENOMEM;
4434
20a69341 4435 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 4436 if (!nft_is_active_next(ctx->net, i))
4437 continue;
e63aaaa6
AY		 4438 if (!strcmp(set->name, i->name)) {
4439 kfree(set->name);
7fb6f78d 4440 set->name = NULL;
20a69341 4441 return -ENFILE;
e63aaaa6 4442 }
20a69341
PM		 4443 }
4444 return 0;
4445}
4446
917d80d3 4447int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 4448{
4449 u64 ms = be64_to_cpu(nla_get_be64(nla));
4450 u64 max = (u64)(~((u64)0));
4451
4452 max = div_u64(max, NSEC_PER_MSEC);
4453 if (ms >= max)
4454 return -ERANGE;
4455
4456 ms *= NSEC_PER_MSEC;
4457 *result = nsecs_to_jiffies64(ms);
4458 return 0;
4459}
4460
917d80d3 4461__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 4462{
3b15d09f 4463 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 4464}
4465
f3a2181e
SB		 4466static int nf_tables_fill_set_concat(struct sk_buff *skb,
4467 const struct nft_set *set)
4468{
4469 struct nlattr *concat, *field;
4470 int i;
4471
4472 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4473 if (!concat)
4474 return -ENOMEM;
4475
4476 for (i = 0; i < set->field_count; i++) {
4477 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4478 if (!field)
4479 return -ENOMEM;
4480
4481 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4482 htonl(set->field_len[i])))
4483 return -ENOMEM;
4484
4485 nla_nest_end(skb, field);
4486 }
4487
4488 nla_nest_end(skb, concat);
4489
4490 return 0;
4491}
4492
20a69341
PM		 4493static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4494 const struct nft_set *set, u16 event, u16 flags)
4495{
123b9961
PNA		 4496 u64 timeout = READ_ONCE(set->timeout);
4497 u32 gc_int = READ_ONCE(set->gc_int);
128ad332 4498 u32 portid = ctx->portid;
123b9961 4499 struct nlmsghdr *nlh;
65038428 4500 struct nlattr *nest;
128ad332 4501 u32 seq = ctx->seq;
48b0ae04 4502 int i;
20a69341 4503
dedb67c4 4504 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4505 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4506 NFNETLINK_V0, nft_base_seq(ctx->net));
4507 if (!nlh)
20a69341
PM		 4508 goto nla_put_failure;
4509
20a69341
PM		 4510 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4511 goto nla_put_failure;
4512 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4513 goto nla_put_failure;
3ecbfd65
HS		 4514 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4515 NFTA_SET_PAD))
4516 goto nla_put_failure;
28339b21
PNA		 4517
4518 if (event == NFT_MSG_DELSET) {
4519 nlmsg_end(skb, nlh);
4520 return 0;
4521 }
4522
20a69341
PM		 4523 if (set->flags != 0)
4524 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4525 goto nla_put_failure;
4526
4527 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4528 goto nla_put_failure;
4529 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4530 goto nla_put_failure;
4531 if (set->flags & NFT_SET_MAP) {
4532 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4533 goto nla_put_failure;
4534 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4535 goto nla_put_failure;
4536 }
8aeff920
PNA		 4537 if (set->flags & NFT_SET_OBJECT &&
4538 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4539 goto nla_put_failure;
20a69341 4540
123b9961 4541 if (timeout &&
d3e2a111 4542 nla_put_be64(skb, NFTA_SET_TIMEOUT,
123b9961 4543 nf_jiffies64_to_msecs(timeout),
b46f6ded 4544 NFTA_SET_PAD))
761da293 4545 goto nla_put_failure;
123b9961
PNA		 4546 if (gc_int &&
4547 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(gc_int)))
761da293
PM		 4548 goto nla_put_failure;
4549
9363dc4b
AB		 4550 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4551 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4552 goto nla_put_failure;
4553 }
4554
6f03bf43
PNA		 4555 if (set->udata &&
4556 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4557 goto nla_put_failure;
4558
65038428
PNA		 4559 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4560 if (!nest)
c50b960c
PM		 4561 goto nla_put_failure;
4562 if (set->size &&
4563 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4564 goto nla_put_failure;
f3a2181e
SB		 4565
4566 if (set->field_count > 1 &&
4567 nf_tables_fill_set_concat(skb, set))
4568 goto nla_put_failure;
4569
65038428
PNA		 4570 nla_nest_end(skb, nest);
4571
8cfd9b0f 4572 if (set->num_exprs == 1) {
65038428 4573 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8daa8fde 4574 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
65038428
PNA		 4575 goto nla_put_failure;
4576
4577 nla_nest_end(skb, nest);
48b0ae04
PNA		 4578 } else if (set->num_exprs > 1) {
4579 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4580 if (nest == NULL)
65038428
PNA		 4581 goto nla_put_failure;
4582
48b0ae04
PNA		 4583 for (i = 0; i < set->num_exprs; i++) {
4584 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
8daa8fde 4585 set->exprs[i], false) < 0)
48b0ae04
PNA		 4586 goto nla_put_failure;
4587 }
65038428
PNA		 4588 nla_nest_end(skb, nest);
4589 }
c50b960c 4590
053c095a
JB		 4591 nlmsg_end(skb, nlh);
4592 return 0;
20a69341
PM		 4593
4594nla_put_failure:
4595 nlmsg_trim(skb, nlh);
4596 return -1;
4597}
4598
25e94a99
PNA		 4599static void nf_tables_set_notify(const struct nft_ctx *ctx,
4600 const struct nft_set *set, int event,
4601 gfp_t gfp_flags)
20a69341 4602{
d59d2f82 4603 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4604 u32 portid = ctx->portid;
6fb721cf
PNA		 4605 struct sk_buff *skb;
4606 u16 flags = 0;
20a69341
PM		 4607 int err;
4608
128ad332
PNA		 4609 if (!ctx->report &&
4610 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4611 return;
20a69341 4612
31f8441c 4613 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4614 if (skb == NULL)
4615 goto err;
4616
6fb721cf
PNA		 4617 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4618 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4619
4620 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4621 if (err < 0) {
4622 kfree_skb(skb);
4623 goto err;
4624 }
4625
0854db2a 4626 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4627 return;
20a69341 4628err:
25e94a99 4629 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4630}
4631
5b96af77 4632static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4633{
4634 const struct nft_set *set;
4635 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4636 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4637 struct net *net = sock_net(skb->sk);
5b96af77 4638 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4639 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4640
4641 if (cb->args[1])
4642 return skb->len;
4643
e688a7f8 4644 rcu_read_lock();
d59d2f82 4645 nft_net = nft_pernet(net);
34002783 4646 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4647
0854db2a 4648 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4649 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4650 ctx->family != table->family)
36596dad
PNA		 4651 continue;
4652
4653 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4654 continue;
4655
36596dad
PNA		 4656 if (cur_table) {
4657 if (cur_table != table)
c9c8e485
PNA		 4658 continue;
4659
36596dad 4660 cur_table = NULL;
c9c8e485 4661 }
36596dad
PNA		 4662 idx = 0;
4663 list_for_each_entry_rcu(set, &table->sets, list) {
4664 if (idx < s_idx)
4665 goto cont;
4666 if (!nft_is_active(net, set))
4667 goto cont;
5b96af77 4668
36596dad
PNA		 4669 ctx_set = *ctx;
4670 ctx_set.table = table;
98319cb9 4671 ctx_set.family = table->family;
c9c8e485 4672
36596dad
PNA		 4673 if (nf_tables_fill_set(skb, &ctx_set, set,
4674 NFT_MSG_NEWSET,
4675 NLM_F_MULTI) < 0) {
4676 cb->args[0] = idx;
4677 cb->args[2] = (unsigned long) table;
4678 goto done;
c9c8e485 4679 }
36596dad 4680 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4681cont:
36596dad 4682 idx++;
c9c8e485 4683 }
36596dad
PNA		 4684 if (s_idx)
4685 s_idx = 0;
c9c8e485
PNA		 4686 }
4687 cb->args[1] = 1;
4688done:
e688a7f8 4689 rcu_read_unlock();
c9c8e485
PNA		 4690 return skb->len;
4691}
4692
90fd131a
FW		 4693static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4694{
4695 struct nft_ctx *ctx_dump = NULL;
4696
4697 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4698 if (ctx_dump == NULL)
4699 return -ENOMEM;
4700
4701 cb->data = ctx_dump;
4702 return 0;
4703}
4704
5b96af77 4705static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4706{
5b96af77
PNA		 4707 kfree(cb->data);
4708 return 0;
20a69341
PM		 4709}
4710
d9adf22a 4711/* called with rcu_read_lock held */
797d4980
PNA		 4712static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4713 const struct nlattr * const nla[])
20a69341 4714{
797d4980
PNA		 4715 struct netlink_ext_ack *extack = info->extack;
4716 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4717 u8 family = info->nfmsg->nfgen_family;
4718 struct nft_table *table = NULL;
797d4980 4719 struct net *net = info->net;
20a69341 4720 const struct nft_set *set;
20a69341 4721 struct sk_buff *skb2;
797d4980 4722 struct nft_ctx ctx;
20a69341
PM		 4723 int err;
4724
67086651
PNA		 4725 if (nla[NFTA_SET_TABLE]) {
4726 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4727 genmask, 0);
4728 if (IS_ERR(table)) {
4729 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4730 return PTR_ERR(table);
4731 }
4732 }
4733
4734 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4735
797d4980 4736 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4737 struct netlink_dump_control c = {
90fd131a 4738 .start = nf_tables_dump_sets_start,
20a69341 4739 .dump = nf_tables_dump_sets,
5b96af77 4740 .done = nf_tables_dump_sets_done,
90fd131a 4741 .data = &ctx,
d9adf22a 4742 .module = THIS_MODULE,
20a69341 4743 };
5b96af77 4744
797d4980 4745 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4746 }
4747
c9c8e485 4748 /* Only accept unspec with dump */
ef4b65e5 4749 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4750 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4751 if (!nla[NFTA_SET_TABLE])
4752 return -EINVAL;
c9c8e485 4753
67086651 4754 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
aee1f692
PNA		 4755 if (IS_ERR(set)) {
4756 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4757 return PTR_ERR(set);
aee1f692 4758 }
20a69341 4759
d9adf22a 4760 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4761 if (skb2 == NULL)
4762 return -ENOMEM;
4763
4764 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4765 if (err < 0)
ee921183 4766 goto err_fill_set_info;
20a69341 4767
ee921183 4768 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4769
ee921183 4770err_fill_set_info:
20a69341
PM		 4771 kfree_skb(skb2);
4772 return err;
4773}
4774
f3a2181e
SB		 4775static int nft_set_desc_concat_parse(const struct nlattr *attr,
4776 struct nft_set_desc *desc)
4777{
4778 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4779 u32 len;
4780 int err;
4781
fecf31ee
PNA		 4782 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4783 return -E2BIG;
4784
f3a2181e
SB		 4785 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4786 nft_concat_policy, NULL);
4787 if (err < 0)
4788 return err;
4789
4790 if (!tb[NFTA_SET_FIELD_LEN])
4791 return -EINVAL;
4792
4793 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4794 if (!len || len > U8_MAX)
4795 return -EINVAL;
f3a2181e
SB		 4796
4797 desc->field_len[desc->field_count++] = len;
4798
4799 return 0;
4800}
4801
4802static int nft_set_desc_concat(struct nft_set_desc *desc,
4803 const struct nlattr *nla)
4804{
4805 struct nlattr *attr;
fecf31ee
PNA		 4806 u32 num_regs = 0;
4807 int rem, err, i;
f3a2181e
SB		 4808
4809 nla_for_each_nested(attr, nla, rem) {
4810 if (nla_type(attr) != NFTA_LIST_ELEM)
4811 return -EINVAL;
4812
4813 err = nft_set_desc_concat_parse(attr, desc);
4814 if (err < 0)
4815 return err;
4816 }
4817
fecf31ee
PNA		 4818 for (i = 0; i < desc->field_count; i++)
4819 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4820
4821 if (num_regs > NFT_REG32_COUNT)
4822 return -E2BIG;
4823
f3a2181e
SB		 4824 return 0;
4825}
4826
f7e840ee 4827static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4828 const struct nlattr *nla)
4829{
4830 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4831 int err;
4832
8cb08174
JB		 4833 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4834 nft_set_desc_policy, NULL);
c50b960c
PM		 4835 if (err < 0)
4836 return err;
4837
4838 if (da[NFTA_SET_DESC_SIZE] != NULL)
4839 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4840 if (da[NFTA_SET_DESC_CONCAT])
4841 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4842
f3a2181e 4843 return err;
c50b960c
PM		 4844}
4845
a8fe4154
PNA		 4846static int nft_set_expr_alloc(struct nft_ctx *ctx, struct nft_set *set,
4847 const struct nlattr * const *nla,
4848 struct nft_expr **exprs, int *num_exprs,
4849 u32 flags)
4850{
4851 struct nft_expr *expr;
4852 int err, i;
4853
4854 if (nla[NFTA_SET_EXPR]) {
4855 expr = nft_set_elem_expr_alloc(ctx, set, nla[NFTA_SET_EXPR]);
4856 if (IS_ERR(expr)) {
4857 err = PTR_ERR(expr);
4858 goto err_set_expr_alloc;
4859 }
4860 exprs[0] = expr;
4861 (*num_exprs)++;
4862 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4863 struct nlattr *tmp;
4864 int left;
4865
4866 if (!(flags & NFT_SET_EXPR)) {
4867 err = -EINVAL;
4868 goto err_set_expr_alloc;
4869 }
4870 i = 0;
4871 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4872 if (i == NFT_SET_EXPR_MAX) {
4873 err = -E2BIG;
4874 goto err_set_expr_alloc;
4875 }
4876 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4877 err = -EINVAL;
4878 goto err_set_expr_alloc;
4879 }
4880 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
4881 if (IS_ERR(expr)) {
4882 err = PTR_ERR(expr);
4883 goto err_set_expr_alloc;
4884 }
4885 exprs[i++] = expr;
4886 (*num_exprs)++;
4887 }
4888 }
4889
4890 return 0;
4891
4892err_set_expr_alloc:
4893 for (i = 0; i < *num_exprs; i++)
4894 nft_expr_destroy(ctx, exprs[i]);
4895
4896 return err;
4897}
4898
f6594c37
PNA		 4899static bool nft_set_is_same(const struct nft_set *set,
4900 const struct nft_set_desc *desc,
4901 struct nft_expr *exprs[], u32 num_exprs, u32 flags)
4902{
4903 int i;
4904
4905 if (set->ktype != desc->ktype ||
4906 set->dtype != desc->dtype ||
4907 set->flags != flags ||
4908 set->klen != desc->klen ||
4909 set->dlen != desc->dlen ||
4910 set->field_count != desc->field_count ||
4911 set->num_exprs != num_exprs)
4912 return false;
4913
4914 for (i = 0; i < desc->field_count; i++) {
4915 if (set->field_len[i] != desc->field_len[i])
4916 return false;
4917 }
4918
4919 for (i = 0; i < num_exprs; i++) {
4920 if (set->exprs[i]->ops != exprs[i]->ops)
4921 return false;
4922 }
4923
4924 return true;
4925}
4926
7dab8ee3
PNA		 4927static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4928 const struct nlattr * const nla[])
20a69341 4929{
7dab8ee3
PNA		 4930 struct netlink_ext_ack *extack = info->extack;
4931 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4932 u8 family = info->nfmsg->nfgen_family;
20a69341 4933 const struct nft_set_ops *ops;
7dab8ee3
PNA		 4934 struct net *net = info->net;
4935 struct nft_set_desc desc;
20a69341 4936 struct nft_table *table;
7dab8ee3 4937 unsigned char *udata;
20a69341
PM		 4938 struct nft_set *set;
4939 struct nft_ctx ctx;
6c8774a9 4940 size_t alloc_size;
a8fe4154 4941 int num_exprs = 0;
7dab8ee3
PNA		 4942 char *name;
4943 int err, i;
e6d8ecac 4944 u16 udlen;
bed4a63e 4945 u32 flags;
7dab8ee3 4946 u64 size;
20a69341
PM		 4947
4948 if (nla[NFTA_SET_TABLE] == NULL ||
4949 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4950 nla[NFTA_SET_KEY_LEN] == NULL ||
4951 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4952 return -EINVAL;
4953
c50b960c
PM		 4954 memset(&desc, 0, sizeof(desc));
4955
bed4a63e 4956 desc.ktype = NFT_DATA_VALUE;
20a69341 4957 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
bed4a63e
PNA		 4958 desc.ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4959 if ((desc.ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
20a69341
PM		 4960 return -EINVAL;
4961 }
4962
c50b960c 4963 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4964 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4965 return -EINVAL;
4966
4967 flags = 0;
4968 if (nla[NFTA_SET_FLAGS] != NULL) {
4969 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4970 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4971 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4972 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4973 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4974 return -EOPNOTSUPP;
8aeff920 4975 /* Only one of these operations is supported */
acab7131
FW		 4976 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4977 (NFT_SET_MAP | NFT_SET_OBJECT))
4978 return -EOPNOTSUPP;
4979 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4980 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4981 return -EOPNOTSUPP;
20a69341
PM		 4982 }
4983
bed4a63e 4984 desc.dtype = 0;
20a69341
PM		 4985 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4986 if (!(flags & NFT_SET_MAP))
4987 return -EINVAL;
4988
bed4a63e
PNA		 4989 desc.dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4990 if ((desc.dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4991 desc.dtype != NFT_DATA_VERDICT)
20a69341
PM		 4992 return -EINVAL;
4993
bed4a63e 4994 if (desc.dtype != NFT_DATA_VERDICT) {
20a69341
PM		 4995 if (nla[NFTA_SET_DATA_LEN] == NULL)
4996 return -EINVAL;
c50b960c 4997 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4998 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4999 return -EINVAL;
5000 } else
7d740264 5001 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 5002 } else if (flags & NFT_SET_MAP)
5003 return -EINVAL;
5004
8aeff920
PNA		 5005 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
5006 if (!(flags & NFT_SET_OBJECT))
5007 return -EINVAL;
5008
bed4a63e
PNA		 5009 desc.objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
5010 if (desc.objtype == NFT_OBJECT_UNSPEC ||
5011 desc.objtype > NFT_OBJECT_MAX)
d9583cdf 5012 return -EOPNOTSUPP;
8aeff920
PNA		 5013 } else if (flags & NFT_SET_OBJECT)
5014 return -EINVAL;
5015 else
bed4a63e 5016 desc.objtype = NFT_OBJECT_UNSPEC;
8aeff920 5017
bed4a63e 5018 desc.timeout = 0;
761da293
PM		 5019 if (nla[NFTA_SET_TIMEOUT] != NULL) {
5020 if (!(flags & NFT_SET_TIMEOUT))
5021 return -EINVAL;
8e1102d5 5022
e26d3009
PNA		 5023 if (flags & NFT_SET_ANONYMOUS)
5024 return -EOPNOTSUPP;
5025
bed4a63e 5026 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &desc.timeout);
8e1102d5
FW		 5027 if (err)
5028 return err;
761da293 5029 }
bed4a63e 5030 desc.gc_int = 0;
761da293
PM		 5031 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
5032 if (!(flags & NFT_SET_TIMEOUT))
5033 return -EINVAL;
e26d3009
PNA		 5034
5035 if (flags & NFT_SET_ANONYMOUS)
5036 return -EOPNOTSUPP;
5037
bed4a63e 5038 desc.gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
761da293
PM		 5039 }
5040
bed4a63e 5041 desc.policy = NFT_SET_POL_PERFORMANCE;
c50b960c 5042 if (nla[NFTA_SET_POLICY] != NULL)
bed4a63e 5043 desc.policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
c50b960c
PM		 5044
5045 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 5046 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 5047 if (err < 0)
5048 return err;
1b6345d4
PNA		 5049
5050 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
5051 return -EINVAL;
5052 } else if (flags & NFT_SET_CONCAT) {
5053 return -EINVAL;
c50b960c
PM		 5054 }
5055
48b0ae04 5056 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 5057 desc.expr = true;
5058
6001a930
PNA		 5059 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
5060 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 5061 if (IS_ERR(table)) {
5062 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 5063 return PTR_ERR(table);
36dd1bcc 5064 }
20a69341 5065
7dab8ee3 5066 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 5067
cac20fcd 5068 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 5069 if (IS_ERR(set)) {
36dd1bcc
PNA		 5070 if (PTR_ERR(set) != -ENOENT) {
5071 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 5072 return PTR_ERR(set);
36dd1bcc 5073 }
1a28ad74 5074 } else {
a8fe4154
PNA		 5075 struct nft_expr *exprs[NFT_SET_EXPR_MAX] = {};
5076
7dab8ee3 5077 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 5078 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 5079 return -EEXIST;
36dd1bcc 5080 }
7dab8ee3 5081 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 5082 return -EOPNOTSUPP;
36dd1bcc 5083
b770283c
PNA		 5084 if (nft_set_is_anonymous(set))
5085 return -EOPNOTSUPP;
5086
a8fe4154
PNA		 5087 err = nft_set_expr_alloc(&ctx, set, nla, exprs, &num_exprs, flags);
5088 if (err < 0)
5089 return err;
5090
f6594c37
PNA		 5091 err = 0;
5092 if (!nft_set_is_same(set, &desc, exprs, num_exprs, flags)) {
5093 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
5094 err = -EEXIST;
5095 }
5096
a8fe4154
PNA		 5097 for (i = 0; i < num_exprs; i++)
5098 nft_expr_destroy(&ctx, exprs[i]);
5099
123b9961
PNA		 5100 if (err < 0)
5101 return err;
5102
5103 return __nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set, &desc);
20a69341
PM		 5104 }
5105
7dab8ee3 5106 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 5107 return -ENOENT;
5108
bed4a63e 5109 ops = nft_select_set_ops(&ctx, nla, &desc);
20a69341
PM		 5110 if (IS_ERR(ops))
5111 return PTR_ERR(ops);
5112
e6d8ecac
CFG		 5113 udlen = 0;
5114 if (nla[NFTA_SET_USERDATA])
5115 udlen = nla_len(nla[NFTA_SET_USERDATA]);
5116
20a69341
PM		 5117 size = 0;
5118 if (ops->privsize != NULL)
347b408d 5119 size = ops->privsize(nla, &desc);
6c8774a9 5120 alloc_size = sizeof(*set) + size + udlen;
45928afe 5121 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 5122 return -ENOMEM;
1689f259
PNA		 5123
5124 if (!nft_use_inc(&table->use))
5125 return -EMFILE;
5126
33758c89 5127 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
1689f259
PNA		 5128 if (!set) {
5129 err = -ENOMEM;
5130 goto err_alloc;
5131 }
20a69341 5132
33758c89 5133 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 5134 if (!name) {
5135 err = -ENOMEM;
65038428 5136 goto err_set_name;
38745490
PS		 5137 }
5138
20a69341 5139 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 5140 kfree(name);
20a69341 5141 if (err < 0)
ad9f151e
PNA		 5142 goto err_set_name;
5143
5144 udata = NULL;
5145 if (udlen) {
5146 udata = set->data + size;
5147 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
5148 }
5149
5150 INIT_LIST_HEAD(&set->bindings);
5151 INIT_LIST_HEAD(&set->catchall_list);
5f68718b 5152 refcount_set(&set->refs, 1);
ad9f151e
PNA		 5153 set->table = table;
5154 write_pnet(&set->net, net);
5155 set->ops = ops;
bed4a63e 5156 set->ktype = desc.ktype;
ad9f151e 5157 set->klen = desc.klen;
bed4a63e
PNA		 5158 set->dtype = desc.dtype;
5159 set->objtype = desc.objtype;
ad9f151e
PNA		 5160 set->dlen = desc.dlen;
5161 set->flags = flags;
5162 set->size = desc.size;
bed4a63e 5163 set->policy = desc.policy;
ad9f151e
PNA		 5164 set->udlen = udlen;
5165 set->udata = udata;
bed4a63e
PNA		 5166 set->timeout = desc.timeout;
5167 set->gc_int = desc.gc_int;
ad9f151e
PNA		 5168
5169 set->field_count = desc.field_count;
5170 for (i = 0; i < desc.field_count; i++)
5171 set->field_len[i] = desc.field_len[i];
5172
5173 err = ops->init(set, &desc, nla);
5174 if (err < 0)
5175 goto err_set_init;
65038428 5176
a8fe4154
PNA		 5177 err = nft_set_expr_alloc(&ctx, set, nla, set->exprs, &num_exprs, flags);
5178 if (err < 0)
5179 goto err_set_destroy;
20a69341 5180
a8fe4154 5181 set->num_exprs = num_exprs;
3ecbfd65 5182 set->handle = nf_tables_alloc_handle(table);
212ed75d 5183 INIT_LIST_HEAD(&set->pending_update);
20a69341 5184
958bee14 5185 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 5186 if (err < 0)
ad9f151e 5187 goto err_set_expr_alloc;
20a69341 5188
e688a7f8 5189 list_add_tail_rcu(&set->list, &table->sets);
1689f259 5190
20a69341
PM		 5191 return 0;
5192
ad9f151e 5193err_set_expr_alloc:
8cfd9b0f
PNA		 5194 for (i = 0; i < set->num_exprs; i++)
5195 nft_expr_destroy(&ctx, set->exprs[i]);
a8fe4154 5196err_set_destroy:
628bd3e4 5197 ops->destroy(&ctx, set);
ad9f151e 5198err_set_init:
2f6adf48 5199 kfree(set->name);
65038428 5200err_set_name:
1ff75a3e 5201 kvfree(set);
1689f259
PNA		 5202err_alloc:
5203 nft_use_dec_restore(&table->use);
5204
20a69341
PM		 5205 return err;
5206}
5207
aaa31047
PNA		 5208static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
5209 struct nft_set *set)
5210{
0f7d9b31 5211 struct nft_set_elem_catchall *next, *catchall;
aaa31047 5212
0f7d9b31 5213 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047 5214 list_del_rcu(&catchall->list);
628bd3e4 5215 nf_tables_set_elem_destroy(ctx, set, catchall->elem);
ae089831 5216 kfree_rcu(catchall, rcu);
aaa31047
PNA		 5217 }
5218}
5219
5f68718b
PNA		 5220static void nft_set_put(struct nft_set *set)
5221{
5222 if (refcount_dec_and_test(&set->refs)) {
5223 kfree(set->name);
5224 kvfree(set);
5225 }
5226}
5227
0c2a85ed 5228static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 5229{
8cfd9b0f
PNA		 5230 int i;
5231
273fe3f1
PNA		 5232 if (WARN_ON(set->use > 0))
5233 return;
5234
8cfd9b0f
PNA		 5235 for (i = 0; i < set->num_exprs; i++)
5236 nft_expr_destroy(ctx, set->exprs[i]);
65038428 5237
628bd3e4 5238 set->ops->destroy(ctx, set);
aaa31047 5239 nft_set_catchall_destroy(ctx, set);
5f68718b 5240 nft_set_put(set);
20a69341
PM		 5241}
5242
7dab8ee3
PNA		 5243static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
5244 const struct nlattr * const nla[])
20a69341 5245{
7dab8ee3
PNA		 5246 struct netlink_ext_ack *extack = info->extack;
5247 u8 genmask = nft_genmask_next(info->net);
67086651 5248 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 5249 struct net *net = info->net;
36dd1bcc 5250 const struct nlattr *attr;
67086651 5251 struct nft_table *table;
20a69341
PM		 5252 struct nft_set *set;
5253 struct nft_ctx ctx;
20a69341 5254
ef4b65e5 5255 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 5256 return -EAFNOSUPPORT;
20a69341 5257
67086651
PNA		 5258 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
5259 genmask, NETLINK_CB(skb).portid);
5260 if (IS_ERR(table)) {
5261 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
5262 return PTR_ERR(table);
5263 }
20a69341 5264
36dd1bcc
PNA		 5265 if (nla[NFTA_SET_HANDLE]) {
5266 attr = nla[NFTA_SET_HANDLE];
67086651 5267 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 5268 } else {
5269 attr = nla[NFTA_SET_NAME];
67086651 5270 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 5271 }
a8278400 5272
36dd1bcc 5273 if (IS_ERR(set)) {
f80a612d
FFM		 5274 if (PTR_ERR(set) == -ENOENT &&
5275 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
5276 return 0;
5277
36dd1bcc
PNA		 5278 NL_SET_BAD_ATTR(extack, attr);
5279 return PTR_ERR(set);
5280 }
273fe3f1 5281 if (set->use ||
7dab8ee3
PNA		 5282 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
5283 atomic_read(&set->nelems) > 0)) {
36dd1bcc 5284 NL_SET_BAD_ATTR(extack, attr);
20a69341 5285 return -EBUSY;
36dd1bcc 5286 }
20a69341 5287
67086651
PNA		 5288 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5289
ee01d542 5290 return nft_delset(&ctx, set);
20a69341
PM		 5291}
5292
345023b0
PNA		 5293static int nft_validate_register_store(const struct nft_ctx *ctx,
5294 enum nft_registers reg,
5295 const struct nft_data *data,
5296 enum nft_data_types type,
5297 unsigned int len);
5298
97c976d6
PNA		 5299static int nft_setelem_data_validate(const struct nft_ctx *ctx,
5300 struct nft_set *set,
0e1ea651 5301 struct nft_elem_priv *elem_priv)
20a69341 5302{
0e1ea651 5303 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
20a69341
PM		 5304 enum nft_registers dreg;
5305
5306 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 5307 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
5308 set->dtype == NFT_DATA_VERDICT ?
5309 NFT_DATA_VERDICT : NFT_DATA_VALUE,
5310 set->dlen);
20a69341
PM		 5311}
5312
97c976d6
PNA		 5313static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
5314 struct nft_set *set,
5315 const struct nft_set_iter *iter,
0e1ea651 5316 struct nft_elem_priv *elem_priv)
97c976d6 5317{
0e1ea651 5318 return nft_setelem_data_validate(ctx, set, elem_priv);
97c976d6
PNA		 5319}
5320
aaa31047
PNA		 5321static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
5322 struct nft_set *set)
5323{
5324 u8 genmask = nft_genmask_next(ctx->net);
5325 struct nft_set_elem_catchall *catchall;
aaa31047
PNA		 5326 struct nft_set_ext *ext;
5327 int ret = 0;
5328
5329 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5330 ext = nft_set_elem_ext(set, catchall->elem);
5331 if (!nft_set_elem_active(ext, genmask))
5332 continue;
5333
0e1ea651 5334 ret = nft_setelem_data_validate(ctx, set, catchall->elem);
aaa31047
PNA		 5335 if (ret < 0)
5336 break;
5337 }
5338
5339 return ret;
5340}
5341
20a69341
PM		 5342int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
5343 struct nft_set_binding *binding)
5344{
5345 struct nft_set_binding *i;
5346 struct nft_set_iter iter;
5347
408070d6 5348 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 5349 return -EBUSY;
5350
11113e19 5351 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 5352 /* If the set is already bound to the same chain all
5353 * jumps are already validated for that chain.
5354 */
5355 list_for_each_entry(i, &set->bindings, list) {
a4684402 5356 if (i->flags & NFT_SET_MAP &&
11113e19 5357 i->chain == binding->chain)
20a69341
PM		 5358 goto bind;
5359 }
5360
8588ac09 5361 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 5362 iter.skip = 0;
5363 iter.count = 0;
5364 iter.err = 0;
5365 iter.fn = nf_tables_bind_check_setelem;
5366
5367 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 5368 if (!iter.err)
5369 iter.err = nft_set_catchall_bind_check(ctx, set);
5370
a02f4248 5371 if (iter.err < 0)
20a69341 5372 return iter.err;
20a69341
PM		 5373 }
5374bind:
1689f259
PNA		 5375 if (!nft_use_inc(&set->use))
5376 return -EMFILE;
5377
20a69341 5378 binding->chain = ctx->chain;
e688a7f8 5379 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585
PNA		 5380 nft_set_trans_bind(ctx, set);
5381
20a69341
PM		 5382 return 0;
5383}
63aea290 5384EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 5385
3b0a081d
FW		 5386static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
5387 struct nft_set_binding *binding, bool event)
20a69341 5388{
e688a7f8 5389 list_del_rcu(&binding->list);
20a69341 5390
f6ac8585 5391 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 5392 list_del_rcu(&set->list);
f6ac8585
PNA		 5393 if (event)
5394 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
5395 GFP_KERNEL);
5396 }
20a69341
PM		 5397}
5398
628bd3e4
PNA		 5399static void nft_setelem_data_activate(const struct net *net,
5400 const struct nft_set *set,
0e1ea651 5401 struct nft_elem_priv *elem_priv);
628bd3e4
PNA		 5402
5403static int nft_mapelem_activate(const struct nft_ctx *ctx,
5404 struct nft_set *set,
5405 const struct nft_set_iter *iter,
0e1ea651 5406 struct nft_elem_priv *elem_priv)
628bd3e4 5407{
0e1ea651 5408 nft_setelem_data_activate(ctx->net, set, elem_priv);
628bd3e4
PNA		 5409
5410 return 0;
5411}
5412
5413static void nft_map_catchall_activate(const struct nft_ctx *ctx,
5414 struct nft_set *set)
5415{
5416 u8 genmask = nft_genmask_next(ctx->net);
5417 struct nft_set_elem_catchall *catchall;
628bd3e4
PNA		 5418 struct nft_set_ext *ext;
5419
5420 list_for_each_entry(catchall, &set->catchall_list, list) {
5421 ext = nft_set_elem_ext(set, catchall->elem);
5422 if (!nft_set_elem_active(ext, genmask))
5423 continue;
5424
0e1ea651 5425 nft_setelem_data_activate(ctx->net, set, catchall->elem);
628bd3e4
PNA		 5426 break;
5427 }
5428}
5429
5430static void nft_map_activate(const struct nft_ctx *ctx, struct nft_set *set)
5431{
5432 struct nft_set_iter iter = {
5433 .genmask = nft_genmask_next(ctx->net),
5434 .fn = nft_mapelem_activate,
5435 };
5436
5437 set->ops->walk(ctx, set, &iter);
5438 WARN_ON_ONCE(iter.err);
5439
5440 nft_map_catchall_activate(ctx, set);
5441}
5442
c1592a89
PNA		 5443void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set)
5444{
628bd3e4
PNA		 5445 if (nft_set_is_anonymous(set)) {
5446 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5447 nft_map_activate(ctx, set);
5448
c1592a89 5449 nft_clear(ctx->net, set);
628bd3e4 5450 }
c1592a89 5451
1689f259 5452 nft_use_inc_restore(&set->use);
c1592a89
PNA		 5453}
5454EXPORT_SYMBOL_GPL(nf_tables_activate_set);
5455
273fe3f1
PNA		 5456void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
5457 struct nft_set_binding *binding,
5458 enum nft_trans_phase phase)
5459{
5460 switch (phase) {
26b5a571
PNA		 5461 case NFT_TRANS_PREPARE_ERROR:
5462 nft_set_trans_unbind(ctx, set);
c1592a89
PNA		 5463 if (nft_set_is_anonymous(set))
5464 nft_deactivate_next(ctx->net, set);
3e704897
PNA		 5465 else
5466 list_del_rcu(&binding->list);
c1592a89 5467
1689f259 5468 nft_use_dec(&set->use);
26b5a571 5469 break;
273fe3f1 5470 case NFT_TRANS_PREPARE:
628bd3e4
PNA		 5471 if (nft_set_is_anonymous(set)) {
5472 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5473 nft_map_deactivate(ctx, set);
c1592a89 5474
628bd3e4
PNA		 5475 nft_deactivate_next(ctx->net, set);
5476 }
1689f259 5477 nft_use_dec(&set->use);
273fe3f1
PNA		 5478 return;
5479 case NFT_TRANS_ABORT:
5480 case NFT_TRANS_RELEASE:
628bd3e4
PNA		 5481 if (nft_set_is_anonymous(set) &&
5482 set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5483 nft_map_deactivate(ctx, set);
5484
1689f259 5485 nft_use_dec(&set->use);
954d8297 5486 fallthrough;
273fe3f1
PNA		 5487 default:
5488 nf_tables_unbind_set(ctx, set, binding,
5489 phase == NFT_TRANS_COMMIT);
5490 }
5491}
5492EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
5493
cd5125d8
FW		 5494void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
5495{
f6ac8585 5496 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 5497 nft_set_destroy(ctx, set);
cd5125d8
FW		 5498}
5499EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
5500
3ac4c07a
PM		 5501const struct nft_set_ext_type nft_set_ext_types[] = {
5502 [NFT_SET_EXT_KEY] = {
7d740264 5503 .align = __alignof__(u32),
3ac4c07a
PM		 5504 },
5505 [NFT_SET_EXT_DATA] = {
7d740264 5506 .align = __alignof__(u32),
3ac4c07a 5507 },
563125a7
PNA		 5508 [NFT_SET_EXT_EXPRESSIONS] = {
5509 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 5510 },
8aeff920
PNA		 5511 [NFT_SET_EXT_OBJREF] = {
5512 .len = sizeof(struct nft_object *),
5513 .align = __alignof__(struct nft_object *),
5514 },
3ac4c07a
PM		 5515 [NFT_SET_EXT_FLAGS] = {
5516 .len = sizeof(u8),
5517 .align = __alignof__(u8),
5518 },
c3e1b005
PM		 5519 [NFT_SET_EXT_TIMEOUT] = {
5520 .len = sizeof(u64),
5521 .align = __alignof__(u64),
5522 },
5523 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 5524 .len = sizeof(u64),
5525 .align = __alignof__(u64),
c3e1b005 5526 },
68e942e8
PM		 5527 [NFT_SET_EXT_USERDATA] = {
5528 .len = sizeof(struct nft_userdata),
5529 .align = __alignof__(struct nft_userdata),
5530 },
7b225d0b
PNA		 5531 [NFT_SET_EXT_KEY_END] = {
5532 .align = __alignof__(u32),
5533 },
3ac4c07a 5534};
3ac4c07a 5535
20a69341
PM		 5536/*
5537 * Set elements
5538 */
5539
5540static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
5541 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
5542 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
5543 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 5544 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 5545 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 5546 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
5547 .len = NFT_USERDATA_MAXLEN },
467697d2 5548 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 5549 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
5550 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 5551 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
013714bf 5552 [NFTA_SET_ELEM_EXPRESSIONS] = NLA_POLICY_NESTED_ARRAY(nft_expr_policy),
20a69341
PM		 5553};
5554
5555static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 5556 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
5557 .len = NFT_TABLE_MAXNAMELEN - 1 },
5558 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
5559 .len = NFT_SET_MAXNAMELEN - 1 },
013714bf 5560 [NFTA_SET_ELEM_LIST_ELEMENTS] = NLA_POLICY_NESTED_ARRAY(nft_set_elem_policy),
958bee14 5561 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 5562};
5563
563125a7
PNA		 5564static int nft_set_elem_expr_dump(struct sk_buff *skb,
5565 const struct nft_set *set,
079cd633
PS		 5566 const struct nft_set_ext *ext,
5567 bool reset)
563125a7
PNA		 5568{
5569 struct nft_set_elem_expr *elem_expr;
5570 u32 size, num_exprs = 0;
5571 struct nft_expr *expr;
48b0ae04 5572 struct nlattr *nest;
563125a7
PNA		 5573
5574 elem_expr = nft_set_ext_expr(ext);
5575 nft_setelem_expr_foreach(expr, elem_expr, size)
5576 num_exprs++;
5577
5578 if (num_exprs == 1) {
5579 expr = nft_setelem_expr_at(elem_expr, 0);
079cd633 5580 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, reset) < 0)
563125a7
PNA		 5581 return -1;
5582
5583 return 0;
48b0ae04
PNA		 5584 } else if (num_exprs > 1) {
5585 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
5586 if (nest == NULL)
5587 goto nla_put_failure;
563125a7 5588
48b0ae04
PNA		 5589 nft_setelem_expr_foreach(expr, elem_expr, size) {
5590 expr = nft_setelem_expr_at(elem_expr, size);
079cd633 5591 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
48b0ae04
PNA		 5592 goto nla_put_failure;
5593 }
5594 nla_nest_end(skb, nest);
5595 }
563125a7 5596 return 0;
48b0ae04
PNA		 5597
5598nla_put_failure:
5599 return -1;
563125a7
PNA		 5600}
5601
20a69341
PM		 5602static int nf_tables_fill_setelem(struct sk_buff *skb,
5603 const struct nft_set *set,
0e1ea651 5604 const struct nft_elem_priv *elem_priv,
079cd633 5605 bool reset)
20a69341 5606{
0e1ea651 5607 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
20a69341
PM		 5608 unsigned char *b = skb_tail_pointer(skb);
5609 struct nlattr *nest;
5610
ae0be8de 5611 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 5612 if (nest == NULL)
5613 goto nla_put_failure;
5614
aaa31047
PNA		 5615 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5616 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 5617 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 5618 goto nla_put_failure;
5619
7b225d0b
PNA		 5620 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5621 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5622 NFT_DATA_VALUE, set->klen) < 0)
5623 goto nla_put_failure;
5624
fe2811eb
PM		 5625 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5626 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 5627 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5628 set->dlen) < 0)
5629 goto nla_put_failure;
5630
563125a7 5631 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
079cd633 5632 nft_set_elem_expr_dump(skb, set, ext, reset))
f25ad2e9
PM		 5633 goto nla_put_failure;
5634
8aeff920
PNA		 5635 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5636 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 5637 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 5638 goto nla_put_failure;
5639
fe2811eb
PM		 5640 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5641 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5642 htonl(*nft_set_ext_flags(ext))))
5643 goto nla_put_failure;
20a69341 5644
4c90bba6
PNA		 5645 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
5646 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
5647 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
5648 NFTA_SET_ELEM_PAD))
5649 goto nla_put_failure;
c3e1b005
PM		 5650
5651 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 5652 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 5653
5654 expires = *nft_set_ext_expiration(ext);
8e1102d5 5655 if (time_before64(now, expires))
c3e1b005
PM		 5656 expires -= now;
5657 else
5658 expires = 0;
5659
5660 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 5661 nf_jiffies64_to_msecs(expires),
b46f6ded 5662 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5663 goto nla_put_failure;
5664 }
5665
68e942e8
PM		 5666 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5667 struct nft_userdata *udata;
5668
5669 udata = nft_set_ext_userdata(ext);
5670 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5671 udata->len + 1, udata->data))
5672 goto nla_put_failure;
5673 }
5674
20a69341
PM		 5675 nla_nest_end(skb, nest);
5676 return 0;
5677
5678nla_put_failure:
5679 nlmsg_trim(skb, b);
5680 return -EMSGSIZE;
5681}
5682
5683struct nft_set_dump_args {
5684 const struct netlink_callback *cb;
5685 struct nft_set_iter iter;
5686 struct sk_buff *skb;
079cd633 5687 bool reset;
20a69341
PM		 5688};
5689
5690static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5691 struct nft_set *set,
20a69341 5692 const struct nft_set_iter *iter,
0e1ea651 5693 struct nft_elem_priv *elem_priv)
20a69341 5694{
0e1ea651 5695 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
20a69341
PM		 5696 struct nft_set_dump_args *args;
5697
24138933
FW		 5698 if (nft_set_elem_expired(ext))
5699 return 0;
5700
20a69341 5701 args = container_of(iter, struct nft_set_dump_args, iter);
0e1ea651 5702 return nf_tables_fill_setelem(args->skb, set, elem_priv, args->reset);
20a69341
PM		 5703}
5704
7e9be112
PS		 5705static void audit_log_nft_set_reset(const struct nft_table *table,
5706 unsigned int base_seq,
5707 unsigned int nentries)
5708{
5709 char *buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, base_seq);
5710
5711 audit_log_nfcfg(buf, table->family, nentries,
5712 AUDIT_NFT_OP_SETELEM_RESET, GFP_ATOMIC);
5713 kfree(buf);
5714}
5715
fa803605
LZ		 5716struct nft_set_dump_ctx {
5717 const struct nft_set *set;
5718 struct nft_ctx ctx;
9cdee063 5719 bool reset;
fa803605
LZ		 5720};
5721
aaa31047 5722static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
7e9be112
PS		 5723 const struct nft_set *set, bool reset,
5724 unsigned int base_seq)
aaa31047
PNA		 5725{
5726 struct nft_set_elem_catchall *catchall;
5727 u8 genmask = nft_genmask_cur(net);
aaa31047
PNA		 5728 struct nft_set_ext *ext;
5729 int ret = 0;
5730
5731 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5732 ext = nft_set_elem_ext(set, catchall->elem);
5733 if (!nft_set_elem_active(ext, genmask) ||
5734 nft_set_elem_expired(ext))
5735 continue;
5736
0e1ea651 5737 ret = nf_tables_fill_setelem(skb, set, catchall->elem, reset);
7e9be112
PS		 5738 if (reset && !ret)
5739 audit_log_nft_set_reset(set->table, base_seq, 1);
aaa31047
PNA		 5740 break;
5741 }
5742
5743 return ret;
5744}
5745
20a69341
PM		 5746static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5747{
fa803605 5748 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5749 struct net *net = sock_net(skb->sk);
0854db2a 5750 struct nftables_pernet *nft_net;
fa803605 5751 struct nft_table *table;
de70185d 5752 struct nft_set *set;
20a69341 5753 struct nft_set_dump_args args;
fa803605 5754 bool set_found = false;
20a69341
PM		 5755 struct nlmsghdr *nlh;
5756 struct nlattr *nest;
5757 u32 portid, seq;
fa803605 5758 int event;
20a69341 5759
fa803605 5760 rcu_read_lock();
d59d2f82 5761 nft_net = nft_pernet(net);
34002783
PNA		 5762 cb->seq = READ_ONCE(nft_net->base_seq);
5763
0854db2a 5764 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5765 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5766 dump_ctx->ctx.family != table->family)
fa803605 5767 continue;
20a69341 5768
36596dad
PNA		 5769 if (table != dump_ctx->ctx.table)
5770 continue;
20a69341 5771
36596dad
PNA		 5772 list_for_each_entry_rcu(set, &table->sets, list) {
5773 if (set == dump_ctx->set) {
5774 set_found = true;
5775 break;
fa803605 5776 }
fa803605
LZ		 5777 }
5778 break;
5779 }
5780
5781 if (!set_found) {
5782 rcu_read_unlock();
5783 return -ENOENT;
5784 }
20a69341 5785
dedb67c4 5786 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5787 portid = NETLINK_CB(cb->skb).portid;
5788 seq = cb->nlh->nlmsg_seq;
5789
19c28b13
PNA		 5790 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5791 table->family, NFNETLINK_V0, nft_base_seq(net));
5792 if (!nlh)
20a69341
PM		 5793 goto nla_put_failure;
5794
fa803605 5795 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5796 goto nla_put_failure;
5797 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5798 goto nla_put_failure;
5799
ae0be8de 5800 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5801 if (nest == NULL)
5802 goto nla_put_failure;
5803
8588ac09
PNA		 5804 args.cb = cb;
5805 args.skb = skb;
9cdee063 5806 args.reset = dump_ctx->reset;
fa803605 5807 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5808 args.iter.skip = cb->args[0];
5809 args.iter.count = 0;
5810 args.iter.err = 0;
5811 args.iter.fn = nf_tables_dump_setelem;
fa803605 5812 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5813
5814 if (!args.iter.err && args.iter.count == cb->args[0])
7e9be112 5815 args.iter.err = nft_set_catchall_dump(net, skb, set,
9cdee063 5816 dump_ctx->reset, cb->seq);
20a69341
PM		 5817 nla_nest_end(skb, nest);
5818 nlmsg_end(skb, nlh);
5819
9cdee063 5820 if (dump_ctx->reset && args.iter.count > args.iter.skip)
7e9be112
PS		 5821 audit_log_nft_set_reset(table, cb->seq,
5822 args.iter.count - args.iter.skip);
5823
9b5ba5c9
PNA		 5824 rcu_read_unlock();
5825
20a69341
PM		 5826 if (args.iter.err && args.iter.err != -EMSGSIZE)
5827 return args.iter.err;
5828 if (args.iter.count == cb->args[0])
5829 return 0;
5830
5831 cb->args[0] = args.iter.count;
5832 return skb->len;
5833
5834nla_put_failure:
fa803605 5835 rcu_read_unlock();
20a69341
PM		 5836 return -ENOSPC;
5837}
5838
90fd131a
FW		 5839static int nf_tables_dump_set_start(struct netlink_callback *cb)
5840{
5841 struct nft_set_dump_ctx *dump_ctx = cb->data;
5842
5843 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5844
5845 return cb->data ? 0 : -ENOMEM;
5846}
5847
fa803605
LZ		 5848static int nf_tables_dump_set_done(struct netlink_callback *cb)
5849{
5850 kfree(cb->data);
5851 return 0;
5852}
5853
d60ce62f
AB		 5854static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5855 const struct nft_ctx *ctx, u32 seq,
5856 u32 portid, int event, u16 flags,
5857 const struct nft_set *set,
0e1ea651 5858 const struct nft_elem_priv *elem_priv,
079cd633 5859 bool reset)
d60ce62f 5860{
d60ce62f
AB		 5861 struct nlmsghdr *nlh;
5862 struct nlattr *nest;
5863 int err;
5864
dedb67c4 5865 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5866 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5867 NFNETLINK_V0, nft_base_seq(ctx->net));
5868 if (!nlh)
d60ce62f
AB		 5869 goto nla_put_failure;
5870
d60ce62f
AB		 5871 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5872 goto nla_put_failure;
5873 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5874 goto nla_put_failure;
5875
ae0be8de 5876 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5877 if (nest == NULL)
5878 goto nla_put_failure;
5879
0e1ea651 5880 err = nf_tables_fill_setelem(skb, set, elem_priv, reset);
d60ce62f
AB		 5881 if (err < 0)
5882 goto nla_put_failure;
5883
5884 nla_nest_end(skb, nest);
5885
053c095a
JB		 5886 nlmsg_end(skb, nlh);
5887 return 0;
d60ce62f
AB		 5888
5889nla_put_failure:
5890 nlmsg_trim(skb, nlh);
5891 return -1;
5892}
5893
ba0e4d99
PNA		 5894static int nft_setelem_parse_flags(const struct nft_set *set,
5895 const struct nlattr *attr, u32 *flags)
5896{
5897 if (attr == NULL)
5898 return 0;
5899
5900 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5901 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5902 return -EOPNOTSUPP;
ba0e4d99
PNA		 5903 if (!(set->flags & NFT_SET_INTERVAL) &&
5904 *flags & NFT_SET_ELEM_INTERVAL_END)
5905 return -EINVAL;
fc0ae524
PNA		 5906 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5907 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5908 return -EINVAL;
ba0e4d99
PNA		 5909
5910 return 0;
5911}
5912
20a1452c
PNA		 5913static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5914 struct nft_data *key, struct nlattr *attr)
5915{
341b6941
PNA		 5916 struct nft_data_desc desc = {
5917 .type = NFT_DATA_VALUE,
5918 .size = NFT_DATA_VALUE_MAXLEN,
5919 .len = set->klen,
5920 };
20a1452c 5921
341b6941 5922 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5923}
5924
fdb9c405
PNA		 5925static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5926 struct nft_data_desc *desc,
5927 struct nft_data *data,
5928 struct nlattr *attr)
5929{
7e6bc1f6 5930 u32 dtype;
fdb9c405 5931
7e6bc1f6
PNA		 5932 if (set->dtype == NFT_DATA_VERDICT)
5933 dtype = NFT_DATA_VERDICT;
5934 else
5935 dtype = NFT_DATA_VALUE;
5936
341b6941
PNA		 5937 desc->type = dtype;
5938 desc->size = NFT_DATA_VALUE_MAXLEN;
5939 desc->len = set->dlen;
f323ef3a 5940 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5941
341b6941 5942 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5943}
5944
aaa31047
PNA		 5945static void *nft_setelem_catchall_get(const struct net *net,
5946 const struct nft_set *set)
5947{
5948 struct nft_set_elem_catchall *catchall;
5949 u8 genmask = nft_genmask_cur(net);
5950 struct nft_set_ext *ext;
5951 void *priv = NULL;
5952
5953 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5954 ext = nft_set_elem_ext(set, catchall->elem);
5955 if (!nft_set_elem_active(ext, genmask) ||
5956 nft_set_elem_expired(ext))
5957 continue;
5958
5959 priv = catchall->elem;
5960 break;
5961 }
5962
5963 return priv;
5964}
5965
5966static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5967 struct nft_set_elem *elem, u32 flags)
5968{
5969 void *priv;
5970
5971 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5972 priv = set->ops->get(ctx->net, set, elem, flags);
5973 if (IS_ERR(priv))
5974 return PTR_ERR(priv);
5975 } else {
5976 priv = nft_setelem_catchall_get(ctx->net, set);
5977 if (!priv)
5978 return -ENOENT;
5979 }
5980 elem->priv = priv;
5981
5982 return 0;
5983}
5984
ba0e4d99 5985static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
079cd633 5986 const struct nlattr *attr, bool reset)
ba0e4d99
PNA		 5987{
5988 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5989 struct nft_set_elem elem;
5990 struct sk_buff *skb;
5991 uint32_t flags = 0;
ba0e4d99
PNA		 5992 int err;
5993
8cb08174
JB		 5994 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5995 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5996 if (err < 0)
5997 return err;
5998
ba0e4d99
PNA		 5999 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6000 if (err < 0)
6001 return err;
6002
aaa31047
PNA		 6003 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
6004 return -EINVAL;
6005
6006 if (nla[NFTA_SET_ELEM_KEY]) {
6007 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6008 nla[NFTA_SET_ELEM_KEY]);
6009 if (err < 0)
6010 return err;
6011 }
ba0e4d99 6012
7b225d0b
PNA		 6013 if (nla[NFTA_SET_ELEM_KEY_END]) {
6014 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6015 nla[NFTA_SET_ELEM_KEY_END]);
6016 if (err < 0)
6017 return err;
6018 }
6019
aaa31047
PNA		 6020 err = nft_setelem_get(ctx, set, &elem, flags);
6021 if (err < 0)
6022 return err;
ba0e4d99
PNA		 6023
6024 err = -ENOMEM;
d9adf22a 6025 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 6026 if (skb == NULL)
ee921183 6027 return err;
ba0e4d99
PNA		 6028
6029 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
0e1ea651 6030 NFT_MSG_NEWSETELEM, 0, set, elem.priv,
079cd633 6031 reset);
ba0e4d99 6032 if (err < 0)
ee921183 6033 goto err_fill_setelem;
ba0e4d99 6034
ee921183 6035 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 6036
ee921183 6037err_fill_setelem:
ba0e4d99 6038 kfree_skb(skb);
ee921183 6039 return err;
ba0e4d99
PNA		 6040}
6041
d9adf22a 6042/* called with rcu_read_lock held */
797d4980
PNA		 6043static int nf_tables_getsetelem(struct sk_buff *skb,
6044 const struct nfnl_info *info,
6045 const struct nlattr * const nla[])
ba0e4d99 6046{
797d4980
PNA		 6047 struct netlink_ext_ack *extack = info->extack;
6048 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 6049 u8 family = info->nfmsg->nfgen_family;
7e9be112 6050 int rem, err = 0, nelems = 0;
797d4980 6051 struct net *net = info->net;
e2b750d7 6052 struct nft_table *table;
ba0e4d99
PNA		 6053 struct nft_set *set;
6054 struct nlattr *attr;
6055 struct nft_ctx ctx;
079cd633 6056 bool reset = false;
ba0e4d99 6057
e2b750d7 6058 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
92f3e96d 6059 genmask, 0);
e2b750d7
PNA		 6060 if (IS_ERR(table)) {
6061 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6062 return PTR_ERR(table);
6063 }
ba0e4d99 6064
e2b750d7 6065 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
aee1f692
PNA		 6066 if (IS_ERR(set)) {
6067 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_SET]);
ba0e4d99 6068 return PTR_ERR(set);
aee1f692 6069 }
ba0e4d99 6070
e2b750d7
PNA		 6071 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6072
9cdee063
PS		 6073 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETSETELEM_RESET)
6074 reset = true;
6075
797d4980 6076 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 6077 struct netlink_dump_control c = {
90fd131a 6078 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 6079 .dump = nf_tables_dump_set,
6080 .done = nf_tables_dump_set_done,
d9adf22a 6081 .module = THIS_MODULE,
ba0e4d99 6082 };
90fd131a
FW		 6083 struct nft_set_dump_ctx dump_ctx = {
6084 .set = set,
6085 .ctx = ctx,
9cdee063 6086 .reset = reset,
90fd131a 6087 };
ba0e4d99 6088
90fd131a 6089 c.data = &dump_ctx;
797d4980 6090 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 6091 }
6092
6093 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6094 return -EINVAL;
6095
6096 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
079cd633 6097 err = nft_get_set_elem(&ctx, set, attr, reset);
b53c1166
PNA		 6098 if (err < 0) {
6099 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 6100 break;
b53c1166 6101 }
7e9be112 6102 nelems++;
ba0e4d99
PNA		 6103 }
6104
7e9be112
PS		 6105 if (reset)
6106 audit_log_nft_set_reset(table, nft_pernet(net)->base_seq,
6107 nelems);
6108
ba0e4d99
PNA		 6109 return err;
6110}
6111
25e94a99
PNA		 6112static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
6113 const struct nft_set *set,
0e1ea651 6114 const struct nft_elem_priv *elem_priv,
6fb721cf 6115 int event)
d60ce62f 6116{
0854db2a 6117 struct nftables_pernet *nft_net;
128ad332
PNA		 6118 struct net *net = ctx->net;
6119 u32 portid = ctx->portid;
d60ce62f 6120 struct sk_buff *skb;
6fb721cf 6121 u16 flags = 0;
d60ce62f
AB		 6122 int err;
6123
128ad332 6124 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 6125 return;
d60ce62f 6126
d60ce62f
AB		 6127 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6128 if (skb == NULL)
6129 goto err;
6130
6fb721cf
PNA		 6131 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
6132 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
6133
d60ce62f 6134 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
0e1ea651 6135 set, elem_priv, false);
d60ce62f
AB		 6136 if (err < 0) {
6137 kfree_skb(skb);
6138 goto err;
6139 }
6140
d59d2f82 6141 nft_net = nft_pernet(net);
0854db2a 6142 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 6143 return;
d60ce62f 6144err:
25e94a99 6145 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 6146}
6147
60319eb1
PNA		 6148static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
6149 int msg_type,
6150 struct nft_set *set)
6151{
6152 struct nft_trans *trans;
6153
6154 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
6155 if (trans == NULL)
6156 return NULL;
6157
6158 nft_trans_elem_set(trans) = set;
6159 return trans;
6160}
6161
a7fc9368
PNA		 6162struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
6163 const struct nft_set *set,
6164 const struct nlattr *attr)
6165{
6166 struct nft_expr *expr;
6167 int err;
6168
6169 expr = nft_expr_init(ctx, attr);
6170 if (IS_ERR(expr))
6171 return expr;
6172
6173 err = -EOPNOTSUPP;
a7fc9368
PNA		 6174 if (expr->ops->type->flags & NFT_EXPR_GC) {
6175 if (set->flags & NFT_SET_TIMEOUT)
6176 goto err_set_elem_expr;
6177 if (!set->ops->gc_init)
6178 goto err_set_elem_expr;
6179 set->ops->gc_init(set);
6180 }
6181
6182 return expr;
6183
6184err_set_elem_expr:
6185 nft_expr_destroy(ctx, expr);
6186 return ERR_PTR(err);
6187}
6188
34aae2c2
PNA		 6189static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
6190{
6191 len += nft_set_ext_types[id].len;
6192 if (len > tmpl->ext_len[id] ||
6193 len > U8_MAX)
6194 return -1;
6195
6196 return 0;
6197}
6198
6199static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
6200 void *to, const void *from, u32 len)
6201{
6202 if (nft_set_ext_check(tmpl, id, len) < 0)
6203 return -1;
6204
6205 memcpy(to, from, len);
6206
6207 return 0;
6208}
6209
9dad402b
PNA		 6210struct nft_elem_priv *nft_set_elem_init(const struct nft_set *set,
6211 const struct nft_set_ext_tmpl *tmpl,
6212 const u32 *key, const u32 *key_end,
6213 const u32 *data,
6214 u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 6215{
6216 struct nft_set_ext *ext;
6217 void *elem;
6218
6219 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
6220 if (elem == NULL)
34aae2c2 6221 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 6222
6223 ext = nft_set_elem_ext(set, elem);
6224 nft_set_ext_init(ext, tmpl);
6225
34aae2c2
PNA		 6226 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
6227 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
6228 nft_set_ext_key(ext), key, set->klen) < 0)
6229 goto err_ext_check;
6230
6231 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
6232 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
6233 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
6234 goto err_ext_check;
6235
6236 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6237 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
6238 nft_set_ext_data(ext), data, set->dlen) < 0)
6239 goto err_ext_check;
6240
79ebb5bb
LGL		 6241 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
6242 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
6243 if (expiration == 0)
6244 *nft_set_ext_expiration(ext) += timeout;
6245 }
c3e1b005
PM		 6246 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
6247 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 6248
6249 return elem;
34aae2c2
PNA		 6250
6251err_ext_check:
6252 kfree(elem);
6253
6254 return ERR_PTR(-EINVAL);
fe2811eb
PM		 6255}
6256
563125a7
PNA		 6257static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6258 struct nft_expr *expr)
475beb9c
PNA		 6259{
6260 if (expr->ops->destroy_clone) {
6261 expr->ops->destroy_clone(ctx, expr);
6262 module_put(expr->ops->type->owner);
6263 } else {
6264 nf_tables_expr_destroy(ctx, expr);
6265 }
6266}
6267
563125a7
PNA		 6268static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6269 struct nft_set_elem_expr *elem_expr)
6270{
6271 struct nft_expr *expr;
6272 u32 size;
6273
6274 nft_setelem_expr_foreach(expr, elem_expr, size)
6275 __nft_set_elem_expr_destroy(ctx, expr);
6276}
6277
628bd3e4 6278/* Drop references and destroy. Called from gc, dynset and abort path. */
9dad402b
PNA		 6279void nft_set_elem_destroy(const struct nft_set *set,
6280 const struct nft_elem_priv *elem_priv,
61f9e292 6281 bool destroy_expr)
61edafbb 6282{
9dad402b 6283 struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
3453c927
PNA		 6284 struct nft_ctx ctx = {
6285 .net = read_pnet(&set->net),
6286 .family = set->table->family,
6287 };
61edafbb 6288
59105446 6289 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 6290 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 6291 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 6292 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 6293 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
8aeff920 6294 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
1689f259 6295 nft_use_dec(&(*nft_set_ext_obj(ext))->use);
9dad402b
PNA		 6296
6297 kfree(elem_priv);
61edafbb
PM		 6298}
6299EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
6300
628bd3e4
PNA		 6301/* Destroy element. References have been already dropped in the preparation
6302 * path via nft_setelem_data_deactivate().
59105446 6303 */
628bd3e4 6304void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
9dad402b
PNA		 6305 const struct nft_set *set,
6306 const struct nft_elem_priv *elem_priv)
59105446 6307{
9dad402b 6308 struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
59105446 6309
563125a7 6310 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 6311 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
6312
9dad402b 6313 kfree(elem_priv);
59105446
PNA		 6314}
6315
fca05d4d
PNA		 6316int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
6317 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 6318{
6319 struct nft_expr *expr;
6320 int err, i, k;
6321
6322 for (i = 0; i < set->num_exprs; i++) {
42193ffd 6323 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 6324 if (!expr)
6325 goto err_expr;
6326
6327 err = nft_expr_clone(expr, set->exprs[i]);
6328 if (err < 0) {
c485c35f 6329 kfree(expr);
8cfd9b0f
PNA		 6330 goto err_expr;
6331 }
6332 expr_array[i] = expr;
6333 }
6334
6335 return 0;
6336
6337err_expr:
161b838e
CIK		 6338 for (k = i - 1; k >= 0; k--)
6339 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 6340
6341 return -ENOMEM;
6342}
6343
4d8f9065 6344static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 6345 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 6346 const struct nft_set_ext *ext,
6347 struct nft_expr *expr_array[],
6348 u32 num_exprs)
563125a7
PNA		 6349{
6350 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 6351 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 6352 struct nft_expr *expr;
6353 int i, err;
6354
34aae2c2
PNA		 6355 if (num_exprs == 0)
6356 return 0;
6357
6358 for (i = 0; i < num_exprs; i++)
6359 len += expr_array[i]->ops->size;
6360
6361 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
6362 return -EINVAL;
6363
4d8f9065
PNA		 6364 for (i = 0; i < num_exprs; i++) {
6365 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
6366 err = nft_expr_clone(expr, expr_array[i]);
6367 if (err < 0)
6368 goto err_elem_expr_setup;
6369
6370 elem_expr->size += expr_array[i]->ops->size;
6371 nft_expr_destroy(ctx, expr_array[i]);
6372 expr_array[i] = NULL;
6373 }
6374
6375 return 0;
6376
6377err_elem_expr_setup:
6378 for (; i < num_exprs; i++) {
6379 nft_expr_destroy(ctx, expr_array[i]);
6380 expr_array[i] = NULL;
6381 }
563125a7 6382
4d8f9065 6383 return -ENOMEM;
563125a7
PNA		 6384}
6385
aaa31047
PNA		 6386struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
6387 const struct nft_set *set)
6388{
6389 struct nft_set_elem_catchall *catchall;
6390 u8 genmask = nft_genmask_cur(net);
6391 struct nft_set_ext *ext;
6392
6393 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6394 ext = nft_set_elem_ext(set, catchall->elem);
6395 if (nft_set_elem_active(ext, genmask) &&
5f68718b
PNA		 6396 !nft_set_elem_expired(ext) &&
6397 !nft_set_elem_is_dead(ext))
aaa31047
PNA		 6398 return ext;
6399 }
6400
6401 return NULL;
6402}
6403EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
6404
aaa31047
PNA		 6405static int nft_setelem_catchall_insert(const struct net *net,
6406 struct nft_set *set,
6407 const struct nft_set_elem *elem,
078996fc 6408 struct nft_elem_priv **priv)
aaa31047
PNA		 6409{
6410 struct nft_set_elem_catchall *catchall;
6411 u8 genmask = nft_genmask_next(net);
6412 struct nft_set_ext *ext;
6413
6414 list_for_each_entry(catchall, &set->catchall_list, list) {
6415 ext = nft_set_elem_ext(set, catchall->elem);
6416 if (nft_set_elem_active(ext, genmask)) {
078996fc 6417 *priv = catchall->elem;
aaa31047
PNA		 6418 return -EEXIST;
6419 }
6420 }
6421
6422 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
6423 if (!catchall)
6424 return -ENOMEM;
6425
6426 catchall->elem = elem->priv;
6427 list_add_tail_rcu(&catchall->list, &set->catchall_list);
6428
6429 return 0;
6430}
6431
6432static int nft_setelem_insert(const struct net *net,
6433 struct nft_set *set,
6434 const struct nft_set_elem *elem,
078996fc
PNA		 6435 struct nft_elem_priv **elem_priv,
6436 unsigned int flags)
aaa31047
PNA		 6437{
6438 int ret;
6439
6440 if (flags & NFT_SET_ELEM_CATCHALL)
078996fc 6441 ret = nft_setelem_catchall_insert(net, set, elem, elem_priv);
aaa31047 6442 else
078996fc 6443 ret = set->ops->insert(net, set, elem, elem_priv);
aaa31047
PNA		 6444
6445 return ret;
6446}
6447
6448static bool nft_setelem_is_catchall(const struct nft_set *set,
0e1ea651 6449 const struct nft_elem_priv *elem_priv)
aaa31047 6450{
0e1ea651 6451 struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
aaa31047
PNA		 6452
6453 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
6454 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
6455 return true;
6456
6457 return false;
6458}
6459
6460static void nft_setelem_activate(struct net *net, struct nft_set *set,
0e1ea651 6461 struct nft_elem_priv *elem_priv)
aaa31047 6462{
0e1ea651 6463 struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
aaa31047 6464
0e1ea651 6465 if (nft_setelem_is_catchall(set, elem_priv)) {
aaa31047 6466 nft_set_elem_change_active(net, set, ext);
aaa31047 6467 } else {
0e1ea651 6468 set->ops->activate(net, set, elem_priv);
aaa31047
PNA		 6469 }
6470}
6471
6472static int nft_setelem_catchall_deactivate(const struct net *net,
6473 struct nft_set *set,
6474 struct nft_set_elem *elem)
6475{
6476 struct nft_set_elem_catchall *catchall;
6477 struct nft_set_ext *ext;
6478
6479 list_for_each_entry(catchall, &set->catchall_list, list) {
6480 ext = nft_set_elem_ext(set, catchall->elem);
f6c383b8 6481 if (!nft_is_active(net, ext))
aaa31047
PNA		 6482 continue;
6483
6484 kfree(elem->priv);
6485 elem->priv = catchall->elem;
6486 nft_set_elem_change_active(net, set, ext);
6487 return 0;
6488 }
6489
6490 return -ENOENT;
6491}
6492
6493static int __nft_setelem_deactivate(const struct net *net,
6494 struct nft_set *set,
6495 struct nft_set_elem *elem)
6496{
6497 void *priv;
6498
6499 priv = set->ops->deactivate(net, set, elem);
6500 if (!priv)
6501 return -ENOENT;
6502
6503 kfree(elem->priv);
6504 elem->priv = priv;
6505 set->ndeact++;
6506
6507 return 0;
6508}
6509
6510static int nft_setelem_deactivate(const struct net *net,
6511 struct nft_set *set,
6512 struct nft_set_elem *elem, u32 flags)
6513{
6514 int ret;
6515
6516 if (flags & NFT_SET_ELEM_CATCHALL)
6517 ret = nft_setelem_catchall_deactivate(net, set, elem);
6518 else
6519 ret = __nft_setelem_deactivate(net, set, elem);
6520
6521 return ret;
6522}
6523
93995bf4
PNA		 6524static void nft_setelem_catchall_destroy(struct nft_set_elem_catchall *catchall)
6525{
6526 list_del_rcu(&catchall->list);
6527 kfree_rcu(catchall, rcu);
6528}
6529
aaa31047
PNA		 6530static void nft_setelem_catchall_remove(const struct net *net,
6531 const struct nft_set *set,
0e1ea651 6532 struct nft_elem_priv *elem_priv)
aaa31047
PNA		 6533{
6534 struct nft_set_elem_catchall *catchall, *next;
6535
6536 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
0e1ea651 6537 if (catchall->elem == elem_priv) {
93995bf4 6538 nft_setelem_catchall_destroy(catchall);
aaa31047
PNA		 6539 break;
6540 }
6541 }
6542}
6543
6544static void nft_setelem_remove(const struct net *net,
6545 const struct nft_set *set,
0e1ea651 6546 struct nft_elem_priv *elem_priv)
aaa31047 6547{
0e1ea651
PNA		 6548 if (nft_setelem_is_catchall(set, elem_priv))
6549 nft_setelem_catchall_remove(net, set, elem_priv);
aaa31047 6550 else
0e1ea651 6551 set->ops->remove(net, set, elem_priv);
aaa31047
PNA		 6552}
6553
88cccd90
PNA		 6554static bool nft_setelem_valid_key_end(const struct nft_set *set,
6555 struct nlattr **nla, u32 flags)
6556{
6557 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
6558 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
6559 if (flags & NFT_SET_ELEM_INTERVAL_END)
6560 return false;
96df8360
PNA		 6561
6562 if (nla[NFTA_SET_ELEM_KEY_END] &&
6563 flags & NFT_SET_ELEM_CATCHALL)
88cccd90
PNA		 6564 return false;
6565 } else {
6566 if (nla[NFTA_SET_ELEM_KEY_END])
6567 return false;
6568 }
6569
6570 return true;
6571}
6572
60319eb1 6573static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 6574 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 6575{
8cfd9b0f 6576 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 6577 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 6578 u8 genmask = nft_genmask_next(ctx->net);
664899e8 6579 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 6580 struct nft_set_ext_tmpl tmpl;
c016c7e4 6581 struct nft_set_ext *ext, *ext2;
20a69341
PM		 6582 struct nft_set_elem elem;
6583 struct nft_set_binding *binding;
078996fc 6584 struct nft_elem_priv *elem_priv;
8aeff920 6585 struct nft_object *obj = NULL;
68e942e8 6586 struct nft_userdata *udata;
20a1452c 6587 struct nft_data_desc desc;
20a69341 6588 enum nft_registers dreg;
60319eb1 6589 struct nft_trans *trans;
79ebb5bb 6590 u64 expiration;
078996fc 6591 u64 timeout;
8cfd9b0f 6592 int err, i;
68e942e8 6593 u8 ulen;
20a69341 6594
8cb08174
JB		 6595 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6596 nft_set_elem_policy, NULL);
20a69341
PM		 6597 if (err < 0)
6598 return err;
6599
fe2811eb
PM		 6600 nft_set_ext_prepare(&tmpl);
6601
0e9091d6
PNA		 6602 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6603 if (err < 0)
6604 return err;
aaa31047 6605
d4eb7e39
PNA		 6606 if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
6607 (!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
aaa31047
PNA		 6608 return -EINVAL;
6609
c39ba4de
PNA		 6610 if (flags != 0) {
6611 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6612 if (err < 0)
6613 return err;
6614 }
20a69341
PM		 6615
6616 if (set->flags & NFT_SET_MAP) {
6617 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 6618 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 6619 return -EINVAL;
6620 } else {
6621 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6622 return -EINVAL;
6623 }
6624
5a2f3dc3
PNA		 6625 if (set->flags & NFT_SET_OBJECT) {
6626 if (!nla[NFTA_SET_ELEM_OBJREF] &&
6627 !(flags & NFT_SET_ELEM_INTERVAL_END))
6628 return -EINVAL;
6629 } else {
6630 if (nla[NFTA_SET_ELEM_OBJREF])
6631 return -EINVAL;
6632 }
6633
88cccd90
PNA		 6634 if (!nft_setelem_valid_key_end(set, nla, flags))
6635 return -EINVAL;
6636
bffc124b
PNA		 6637 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
6638 (nla[NFTA_SET_ELEM_DATA] ||
6639 nla[NFTA_SET_ELEM_OBJREF] ||
6640 nla[NFTA_SET_ELEM_TIMEOUT] ||
6641 nla[NFTA_SET_ELEM_EXPIRATION] ||
6642 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 6643 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 6644 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 6645 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 6646 return -EINVAL;
6647
c3e1b005
PM		 6648 timeout = 0;
6649 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6650 if (!(set->flags & NFT_SET_TIMEOUT))
6651 return -EINVAL;
8e1102d5
FW		 6652 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6653 &timeout);
6654 if (err)
6655 return err;
33c7aba0
PNA		 6656 } else if (set->flags & NFT_SET_TIMEOUT &&
6657 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
123b9961 6658 timeout = READ_ONCE(set->timeout);
c3e1b005
PM		 6659 }
6660
79ebb5bb
LGL		 6661 expiration = 0;
6662 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6663 if (!(set->flags & NFT_SET_TIMEOUT))
6664 return -EINVAL;
6665 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6666 &expiration);
6667 if (err)
6668 return err;
6669 }
6670
8cfd9b0f
PNA		 6671 if (nla[NFTA_SET_ELEM_EXPR]) {
6672 struct nft_expr *expr;
6673
664899e8 6674 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 6675 return -EOPNOTSUPP;
6676
40944452
PNA		 6677 expr = nft_set_elem_expr_alloc(ctx, set,
6678 nla[NFTA_SET_ELEM_EXPR]);
6679 if (IS_ERR(expr))
6680 return PTR_ERR(expr);
65038428 6681
8cfd9b0f 6682 expr_array[0] = expr;
664899e8 6683 num_exprs = 1;
65038428 6684
664899e8 6685 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 6686 err = -EOPNOTSUPP;
65038428 6687 goto err_set_elem_expr;
8cfd9b0f 6688 }
48b0ae04
PNA		 6689 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6690 struct nft_expr *expr;
6691 struct nlattr *tmp;
6692 int left;
65038428 6693
48b0ae04
PNA		 6694 i = 0;
6695 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 6696 if (i == NFT_SET_EXPR_MAX ||
6697 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 6698 err = -E2BIG;
6699 goto err_set_elem_expr;
6700 }
6701 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6702 err = -EINVAL;
6703 goto err_set_elem_expr;
6704 }
6705 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6706 if (IS_ERR(expr)) {
6707 err = PTR_ERR(expr);
6708 goto err_set_elem_expr;
6709 }
6710 expr_array[i] = expr;
664899e8 6711 num_exprs++;
48b0ae04 6712
664899e8 6713 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6714 err = -EOPNOTSUPP;
6715 goto err_set_elem_expr;
6716 }
6717 i++;
6718 }
664899e8 6719 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6720 err = -EOPNOTSUPP;
65038428 6721 goto err_set_elem_expr;
48b0ae04 6722 }
33c7aba0
PNA		 6723 } else if (set->num_exprs > 0 &&
6724 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
8cfd9b0f
PNA		 6725 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6726 if (err < 0)
6727 goto err_set_elem_expr_clone;
664899e8
PNA		 6728
6729 num_exprs = set->num_exprs;
40944452
PNA		 6730 }
6731
aaa31047
PNA		 6732 if (nla[NFTA_SET_ELEM_KEY]) {
6733 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6734 nla[NFTA_SET_ELEM_KEY]);
6735 if (err < 0)
6736 goto err_set_elem_expr;
20a69341 6737
c39ba4de
PNA		 6738 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6739 if (err < 0)
6740 goto err_parse_key;
aaa31047 6741 }
7b225d0b
PNA		 6742
6743 if (nla[NFTA_SET_ELEM_KEY_END]) {
6744 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6745 nla[NFTA_SET_ELEM_KEY_END]);
6746 if (err < 0)
6747 goto err_parse_key;
6748
c39ba4de
PNA		 6749 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6750 if (err < 0)
6751 goto err_parse_key_end;
7b225d0b
PNA		 6752 }
6753
c3e1b005 6754 if (timeout > 0) {
c39ba4de
PNA		 6755 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6756 if (err < 0)
6757 goto err_parse_key_end;
6758
123b9961 6759 if (timeout != READ_ONCE(set->timeout)) {
c39ba4de
PNA		 6760 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6761 if (err < 0)
6762 goto err_parse_key_end;
6763 }
c3e1b005 6764 }
fe2811eb 6765
664899e8
PNA		 6766 if (num_exprs) {
6767 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6768 size += expr_array[i]->ops->size;
6769
c39ba4de
PNA		 6770 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6771 sizeof(struct nft_set_elem_expr) + size);
6772 if (err < 0)
6773 goto err_parse_key_end;
563125a7 6774 }
40944452 6775
8aeff920 6776 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6777 obj = nft_obj_lookup(ctx->net, ctx->table,
6778 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6779 set->objtype, genmask);
8aeff920
PNA		 6780 if (IS_ERR(obj)) {
6781 err = PTR_ERR(obj);
1689f259 6782 obj = NULL;
7b225d0b 6783 goto err_parse_key_end;
8aeff920 6784 }
1689f259
PNA		 6785
6786 if (!nft_use_inc(&obj->use)) {
6787 err = -EMFILE;
6788 obj = NULL;
6789 goto err_parse_key_end;
6790 }
6791
c39ba4de
PNA		 6792 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6793 if (err < 0)
6794 goto err_parse_key_end;
8aeff920
PNA		 6795 }
6796
20a69341 6797 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6798 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6799 nla[NFTA_SET_ELEM_DATA]);
20a69341 6800 if (err < 0)
7b225d0b 6801 goto err_parse_key_end;
20a69341 6802
20a69341
PM		 6803 dreg = nft_type_to_reg(set->dtype);
6804 list_for_each_entry(binding, &set->bindings, list) {
6805 struct nft_ctx bind_ctx = {
58c78e10 6806 .net = ctx->net,
36596dad 6807 .family = ctx->family,
20a69341 6808 .table = ctx->table,
7c95f6d8 6809 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6810 };
6811
11113e19
PM		 6812 if (!(binding->flags & NFT_SET_MAP))
6813 continue;
6814
1ec10212 6815 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6816 &elem.data.val,
20a1452c 6817 desc.type, desc.len);
20a69341 6818 if (err < 0)
7b225d0b 6819 goto err_parse_data;
a654de8f 6820
20a1452c 6821 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6822 (elem.data.val.verdict.code == NFT_GOTO ||
6823 elem.data.val.verdict.code == NFT_JUMP))
00c320f9 6824 nft_validate_state_update(ctx->table,
a654de8f 6825 NFT_VALIDATE_NEED);
20a69341 6826 }
fe2811eb 6827
c39ba4de
PNA		 6828 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6829 if (err < 0)
6830 goto err_parse_data;
20a69341
PM		 6831 }
6832
68e942e8
PM		 6833 /* The full maximum length of userdata can exceed the maximum
6834 * offset value (U8_MAX) for following extensions, therefor it
6835 * must be the last extension added.
6836 */
6837 ulen = 0;
6838 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6839 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6840 if (ulen > 0) {
6841 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6842 ulen);
6843 if (err < 0)
6844 goto err_parse_data;
6845 }
68e942e8
PM		 6846 }
6847
7b225d0b 6848 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6849 elem.key_end.val.data, elem.data.val.data,
33758c89 6850 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6851 if (IS_ERR(elem.priv)) {
6852 err = PTR_ERR(elem.priv);
7b225d0b 6853 goto err_parse_data;
34aae2c2 6854 }
fe2811eb
PM		 6855
6856 ext = nft_set_elem_ext(set, elem.priv);
6857 if (flags)
6858 *nft_set_ext_flags(ext) = flags;
34aae2c2 6859
1689f259 6860 if (obj)
d6b47866 6861 *nft_set_ext_obj(ext) = obj;
1689f259 6862
68e942e8 6863 if (ulen > 0) {
34aae2c2
PNA		 6864 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6865 err = -EINVAL;
d6b47866 6866 goto err_elem_free;
34aae2c2 6867 }
68e942e8
PM		 6868 udata = nft_set_ext_userdata(ext);
6869 udata->len = ulen - 1;
6870 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6871 }
34aae2c2 6872 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6873 if (err < 0)
34aae2c2 6874 goto err_elem_free;
fe2811eb 6875
60319eb1 6876 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6877 if (trans == NULL) {
6878 err = -ENOMEM;
34aae2c2 6879 goto err_elem_free;
4d8f9065 6880 }
60319eb1 6881
a2dd0233 6882 ext->genmask = nft_genmask_cur(ctx->net);
aaa31047 6883
078996fc 6884 err = nft_setelem_insert(ctx->net, set, &elem, &elem_priv, flags);
c016c7e4
PNA		 6885 if (err) {
6886 if (err == -EEXIST) {
078996fc 6887 ext2 = nft_set_elem_ext(set, elem_priv);
9744a6fc
PNA		 6888 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6889 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6890 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6891 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6892 goto err_element_clash;
8aeff920
PNA		 6893 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6894 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6895 memcmp(nft_set_ext_data(ext),
6896 nft_set_ext_data(ext2), set->dlen) != 0) ||
6897 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6898 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6899 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6900 goto err_element_clash;
c016c7e4
PNA		 6901 else if (!(nlmsg_flags & NLM_F_EXCL))
6902 err = 0;
8c2d45b2
PNA		 6903 } else if (err == -ENOTEMPTY) {
6904 /* ENOTEMPTY reports overlapping between this element
6905 * and an existing one.
6906 */
6907 err = -EEXIST;
c016c7e4 6908 }
7b225d0b 6909 goto err_element_clash;
c016c7e4 6910 }
20a69341 6911
d4b7f29e
FW		 6912 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
6913 unsigned int max = set->size ? set->size + set->ndeact : UINT_MAX;
6914
6915 if (!atomic_add_unless(&set->nelems, 1, max)) {
6916 err = -ENFILE;
6917 goto err_set_full;
6918 }
35d0ac90
PNA		 6919 }
6920
0e1ea651 6921 nft_trans_elem_priv(trans) = elem.priv;
0854db2a 6922 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6923 return 0;
6924
7b225d0b 6925err_set_full:
0e1ea651 6926 nft_setelem_remove(ctx->net, set, elem.priv);
7b225d0b 6927err_element_clash:
60319eb1 6928 kfree(trans);
34aae2c2 6929err_elem_free:
b389139f 6930 nf_tables_set_elem_destroy(ctx, set, elem.priv);
7b225d0b 6931err_parse_data:
20a69341 6932 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6933 nft_data_release(&elem.data.val, desc.type);
7b225d0b 6934err_parse_key_end:
1689f259
PNA		 6935 if (obj)
6936 nft_use_dec_restore(&obj->use);
6937
7b225d0b
PNA		 6938 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6939err_parse_key:
20a1452c 6940 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6941err_set_elem_expr:
664899e8 6942 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6943 nft_expr_destroy(ctx, expr_array[i]);
6944err_set_elem_expr_clone:
20a69341
PM		 6945 return err;
6946}
6947
7dab8ee3
PNA		 6948static int nf_tables_newsetelem(struct sk_buff *skb,
6949 const struct nfnl_info *info,
6950 const struct nlattr * const nla[])
20a69341 6951{
7dab8ee3
PNA		 6952 struct netlink_ext_ack *extack = info->extack;
6953 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6954 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6955 struct net *net = info->net;
20a69341 6956 const struct nlattr *attr;
e2b750d7 6957 struct nft_table *table;
20a69341
PM		 6958 struct nft_set *set;
6959 struct nft_ctx ctx;
a654de8f 6960 int rem, err;
20a69341 6961
7d5570ca
PNA		 6962 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6963 return -EINVAL;
6964
e2b750d7
PNA		 6965 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6966 genmask, NETLINK_CB(skb).portid);
6967 if (IS_ERR(table)) {
6968 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6969 return PTR_ERR(table);
6970 }
20a69341 6971
e2b750d7 6972 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17 6973 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
aee1f692
PNA		 6974 if (IS_ERR(set)) {
6975 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_SET]);
a3073c17 6976 return PTR_ERR(set);
aee1f692 6977 }
958bee14 6978
c88c535b
PNA		 6979 if (!list_empty(&set->bindings) &&
6980 (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS)))
20a69341
PM		 6981 return -EBUSY;
6982
e2b750d7
PNA		 6983 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6984
20a69341 6985 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6986 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6987 if (err < 0) {
6988 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6989 return err;
b53c1166 6990 }
20a69341 6991 }
a654de8f 6992
00c320f9 6993 if (table->validate_state == NFT_VALIDATE_DO)
e2b750d7 6994 return nft_table_validate(net, table);
a654de8f
PNA		 6995
6996 return 0;
20a69341
PM		 6997}
6998
59105446
PNA		 6999/**
7000 * nft_data_hold - hold a nft_data item
7001 *
7002 * @data: struct nft_data to release
7003 * @type: type of data
7004 *
7005 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
7006 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
7007 * NFT_GOTO verdicts. This function must be called on active data objects
7008 * from the second phase of the commit protocol.
7009 */
bb7b40ae 7010void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 7011{
d0e2c7de 7012 struct nft_chain *chain;
d0e2c7de 7013
59105446
PNA		 7014 if (type == NFT_DATA_VERDICT) {
7015 switch (data->verdict.code) {
7016 case NFT_JUMP:
7017 case NFT_GOTO:
d0e2c7de 7018 chain = data->verdict.chain;
1689f259 7019 nft_use_inc_restore(&chain->use);
59105446
PNA		 7020 break;
7021 }
7022 }
7023}
7024
f8bb7889
PNA		 7025static void nft_setelem_data_activate(const struct net *net,
7026 const struct nft_set *set,
0e1ea651 7027 struct nft_elem_priv *elem_priv)
59105446 7028{
0e1ea651 7029 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
59105446
PNA		 7030
7031 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
7032 nft_data_hold(nft_set_ext_data(ext), set->dtype);
7033 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
1689f259 7034 nft_use_inc_restore(&(*nft_set_ext_obj(ext))->use);
59105446
PNA		 7035}
7036
5f68718b
PNA		 7037void nft_setelem_data_deactivate(const struct net *net,
7038 const struct nft_set *set,
0e1ea651 7039 struct nft_elem_priv *elem_priv)
59105446 7040{
0e1ea651 7041 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
59105446
PNA		 7042
7043 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
7044 nft_data_release(nft_set_ext_data(ext), set->dtype);
7045 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
1689f259 7046 nft_use_dec(&(*nft_set_ext_obj(ext))->use);
59105446
PNA		 7047}
7048
60319eb1 7049static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 7050 const struct nlattr *attr)
7051{
7052 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 7053 struct nft_set_ext_tmpl tmpl;
20a69341 7054 struct nft_set_elem elem;
3971ca14 7055 struct nft_set_ext *ext;
60319eb1 7056 struct nft_trans *trans;
3971ca14 7057 u32 flags = 0;
20a69341
PM		 7058 int err;
7059
8cb08174
JB		 7060 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
7061 nft_set_elem_policy, NULL);
20a69341 7062 if (err < 0)
20a1452c 7063 return err;
20a69341 7064
aaa31047
PNA		 7065 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
7066 if (err < 0)
7067 return err;
7068
7069 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 7070 return -EINVAL;
20a69341 7071
88cccd90
PNA		 7072 if (!nft_setelem_valid_key_end(set, nla, flags))
7073 return -EINVAL;
7074
3971ca14
PNA		 7075 nft_set_ext_prepare(&tmpl);
7076
c39ba4de
PNA		 7077 if (flags != 0) {
7078 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
7079 if (err < 0)
7080 return err;
7081 }
3971ca14 7082
aaa31047
PNA		 7083 if (nla[NFTA_SET_ELEM_KEY]) {
7084 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
7085 nla[NFTA_SET_ELEM_KEY]);
7086 if (err < 0)
7087 return err;
20a69341 7088
c39ba4de
PNA		 7089 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
7090 if (err < 0)
7091 goto fail_elem;
aaa31047 7092 }
3971ca14 7093
7b225d0b
PNA		 7094 if (nla[NFTA_SET_ELEM_KEY_END]) {
7095 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
7096 nla[NFTA_SET_ELEM_KEY_END]);
7097 if (err < 0)
c39ba4de 7098 goto fail_elem;
7b225d0b 7099
c39ba4de
PNA		 7100 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
7101 if (err < 0)
7102 goto fail_elem_key_end;
7b225d0b
PNA		 7103 }
7104
3971ca14 7105 err = -ENOMEM;
7b225d0b
PNA		 7106 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
7107 elem.key_end.val.data, NULL, 0, 0,
33758c89 7108 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 7109 if (IS_ERR(elem.priv)) {
7110 err = PTR_ERR(elem.priv);
c39ba4de 7111 goto fail_elem_key_end;
34aae2c2 7112 }
3971ca14
PNA		 7113
7114 ext = nft_set_elem_ext(set, elem.priv);
7115 if (flags)
7116 *nft_set_ext_flags(ext) = flags;
7117
60319eb1 7118 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 7119 if (trans == NULL)
7120 goto fail_trans;
20a69341 7121
aaa31047
PNA		 7122 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
7123 if (err < 0)
20a1452c 7124 goto fail_ops;
cc02e457 7125
0e1ea651 7126 nft_setelem_data_deactivate(ctx->net, set, elem.priv);
59105446 7127
0e1ea651 7128 nft_trans_elem_priv(trans) = elem.priv;
0854db2a 7129 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 7130 return 0;
cc02e457 7131
20a1452c 7132fail_ops:
cc02e457 7133 kfree(trans);
20a1452c 7134fail_trans:
3971ca14 7135 kfree(elem.priv);
c39ba4de
PNA		 7136fail_elem_key_end:
7137 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 7138fail_elem:
7139 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 7140 return err;
7141}
7142
e6ba7cb6
PNA		 7143static int nft_setelem_flush(const struct nft_ctx *ctx,
7144 struct nft_set *set,
7145 const struct nft_set_iter *iter,
0e1ea651 7146 struct nft_elem_priv *elem_priv)
8411b644
PNA		 7147{
7148 struct nft_trans *trans;
8411b644
PNA		 7149
7150 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
7151 sizeof(struct nft_trans_elem), GFP_ATOMIC);
7152 if (!trans)
7153 return -ENOMEM;
7154
0e1ea651 7155 set->ops->flush(ctx->net, set, elem_priv);
b2c11e4b 7156 set->ndeact++;
8411b644 7157
0e1ea651 7158 nft_setelem_data_deactivate(ctx->net, set, elem_priv);
de70185d 7159 nft_trans_elem_set(trans) = set;
0e1ea651 7160 nft_trans_elem_priv(trans) = elem_priv;
0854db2a 7161 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 7162
7163 return 0;
8411b644
PNA		 7164}
7165
aaa31047
PNA		 7166static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
7167 struct nft_set *set,
0e1ea651 7168 struct nft_elem_priv *elem_priv)
aaa31047
PNA		 7169{
7170 struct nft_trans *trans;
7171
7172 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
7173 sizeof(struct nft_trans_elem), GFP_KERNEL);
7174 if (!trans)
7175 return -ENOMEM;
7176
0e1ea651 7177 nft_setelem_data_deactivate(ctx->net, set, elem_priv);
aaa31047 7178 nft_trans_elem_set(trans) = set;
0e1ea651 7179 nft_trans_elem_priv(trans) = elem_priv;
aaa31047
PNA		 7180 nft_trans_commit_list_add_tail(ctx->net, trans);
7181
7182 return 0;
7183}
7184
7185static int nft_set_catchall_flush(const struct nft_ctx *ctx,
7186 struct nft_set *set)
7187{
7188 u8 genmask = nft_genmask_next(ctx->net);
7189 struct nft_set_elem_catchall *catchall;
aaa31047
PNA		 7190 struct nft_set_ext *ext;
7191 int ret = 0;
7192
7193 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
7194 ext = nft_set_elem_ext(set, catchall->elem);
f6c383b8 7195 if (!nft_set_elem_active(ext, genmask))
aaa31047
PNA		 7196 continue;
7197
0e1ea651 7198 ret = __nft_set_catchall_flush(ctx, set, catchall->elem);
aaa31047
PNA		 7199 if (ret < 0)
7200 break;
90e5b346 7201 nft_set_elem_change_active(ctx->net, set, ext);
aaa31047
PNA		 7202 }
7203
7204 return ret;
7205}
7206
e6ba7cb6
PNA		 7207static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
7208{
7209 struct nft_set_iter iter = {
7210 .genmask = genmask,
7211 .fn = nft_setelem_flush,
7212 };
7213
7214 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 7215 if (!iter.err)
7216 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 7217
7218 return iter.err;
7219}
7220
7dab8ee3
PNA		 7221static int nf_tables_delsetelem(struct sk_buff *skb,
7222 const struct nfnl_info *info,
7223 const struct nlattr * const nla[])
20a69341 7224{
7dab8ee3
PNA		 7225 struct netlink_ext_ack *extack = info->extack;
7226 u8 genmask = nft_genmask_next(info->net);
e2b750d7 7227 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7228 struct net *net = info->net;
20a69341 7229 const struct nlattr *attr;
e2b750d7 7230 struct nft_table *table;
20a69341
PM		 7231 struct nft_set *set;
7232 struct nft_ctx ctx;
60319eb1 7233 int rem, err = 0;
20a69341 7234
e2b750d7
PNA		 7235 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
7236 genmask, NETLINK_CB(skb).portid);
7237 if (IS_ERR(table)) {
7238 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
7239 return PTR_ERR(table);
7240 }
20a69341 7241
e2b750d7 7242 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
aee1f692
PNA		 7243 if (IS_ERR(set)) {
7244 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_SET]);
20a69341 7245 return PTR_ERR(set);
aee1f692 7246 }
c88c535b 7247
23a3bfd4
PNA		 7248 if (nft_set_is_anonymous(set))
7249 return -EOPNOTSUPP;
7250
7251 if (!list_empty(&set->bindings) && (set->flags & NFT_SET_CONSTANT))
20a69341
PM		 7252 return -EBUSY;
7253
e2b750d7
PNA		 7254 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7255
e6ba7cb6
PNA		 7256 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
7257 return nft_set_flush(&ctx, set, genmask);
8411b644 7258
20a69341
PM		 7259 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7260 err = nft_del_setelem(&ctx, set, attr);
f80a612d
FFM		 7261 if (err == -ENOENT &&
7262 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
7263 continue;
7264
b53c1166
PNA		 7265 if (err < 0) {
7266 NL_SET_BAD_ATTR(extack, attr);
a7d5a955 7267 return err;
b53c1166 7268 }
20a69341 7269 }
a7d5a955
PNA		 7270
7271 return 0;
20a69341
PM		 7272}
7273
e5009240
PNA		 7274/*
7275 * Stateful objects
7276 */
7277
7278/**
7279 * nft_register_obj- register nf_tables stateful object type
3db86c39 7280 * @obj_type: object type
e5009240
PNA		 7281 *
7282 * Registers the object type for use with nf_tables. Returns zero on
7283 * success or a negative errno code otherwise.
7284 */
7285int nft_register_obj(struct nft_object_type *obj_type)
7286{
7287 if (obj_type->type == NFT_OBJECT_UNSPEC)
7288 return -EINVAL;
7289
7290 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7291 list_add_rcu(&obj_type->list, &nf_tables_objects);
7292 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7293 return 0;
7294}
7295EXPORT_SYMBOL_GPL(nft_register_obj);
7296
7297/**
7298 * nft_unregister_obj - unregister nf_tables object type
3db86c39 7299 * @obj_type: object type
e5009240
PNA		 7300 *
7301 * Unregisters the object type for use with nf_tables.
7302 */
7303void nft_unregister_obj(struct nft_object_type *obj_type)
7304{
7305 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7306 list_del_rcu(&obj_type->list);
7307 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7308}
7309EXPORT_SYMBOL_GPL(nft_unregister_obj);
7310
4d44175a
FW		 7311struct nft_object *nft_obj_lookup(const struct net *net,
7312 const struct nft_table *table,
cac20fcd
PNA		 7313 const struct nlattr *nla, u32 objtype,
7314 u8 genmask)
e5009240 7315{
4d44175a
FW		 7316 struct nft_object_hash_key k = { .table = table };
7317 char search[NFT_OBJ_MAXNAMELEN];
7318 struct rhlist_head *tmp, *list;
e5009240
PNA		 7319 struct nft_object *obj;
7320
872f6903 7321 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 7322 k.name = search;
7323
7324 WARN_ON_ONCE(!rcu_read_lock_held() &&
7325 !lockdep_commit_lock_is_held(net));
7326
7327 rcu_read_lock();
7328 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
7329 if (!list)
7330 goto out;
7331
7332 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
7333 if (objtype == obj->ops->type->type &&
7334 nft_active_genmask(obj, genmask)) {
7335 rcu_read_unlock();
e5009240 7336 return obj;
4d44175a 7337 }
e5009240 7338 }
4d44175a
FW		 7339out:
7340 rcu_read_unlock();
e5009240
PNA		 7341 return ERR_PTR(-ENOENT);
7342}
cac20fcd 7343EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 7344
cac20fcd
PNA		 7345static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
7346 const struct nlattr *nla,
7347 u32 objtype, u8 genmask)
3ecbfd65
HS		 7348{
7349 struct nft_object *obj;
7350
7351 list_for_each_entry(obj, &table->objects, list) {
7352 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
7353 objtype == obj->ops->type->type &&
7354 nft_active_genmask(obj, genmask))
7355 return obj;
7356 }
7357 return ERR_PTR(-ENOENT);
7358}
7359
e5009240 7360static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 7361 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
7362 .len = NFT_TABLE_MAXNAMELEN - 1 },
7363 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
7364 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 7365 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
7366 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 7367 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 7368 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
7369 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 7370};
7371
84fba055
FW		 7372static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
7373 const struct nft_object_type *type,
e5009240
PNA		 7374 const struct nlattr *attr)
7375{
5b4c6e38 7376 struct nlattr **tb;
dfc46034 7377 const struct nft_object_ops *ops;
e5009240 7378 struct nft_object *obj;
5b4c6e38
GS		 7379 int err = -ENOMEM;
7380
7381 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
7382 if (!tb)
7383 goto err1;
e5009240
PNA		 7384
7385 if (attr) {
8cb08174
JB		 7386 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
7387 type->policy, NULL);
e5009240 7388 if (err < 0)
5b4c6e38 7389 goto err2;
e5009240
PNA		 7390 } else {
7391 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
7392 }
7393
dfc46034
PBG		 7394 if (type->select_ops) {
7395 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
7396 if (IS_ERR(ops)) {
7397 err = PTR_ERR(ops);
5b4c6e38 7398 goto err2;
dfc46034
PBG		 7399 }
7400 } else {
7401 ops = type->ops;
7402 }
7403
e5009240 7404 err = -ENOMEM;
33758c89 7405 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 7406 if (!obj)
7407 goto err2;
e5009240 7408
dfc46034 7409 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 7410 if (err < 0)
5b4c6e38 7411 goto err3;
e5009240 7412
dfc46034
PBG		 7413 obj->ops = ops;
7414
5b4c6e38 7415 kfree(tb);
e5009240 7416 return obj;
5b4c6e38 7417err3:
e5009240 7418 kfree(obj);
5b4c6e38
GS		 7419err2:
7420 kfree(tb);
e5009240
PNA		 7421err1:
7422 return ERR_PTR(err);
7423}
7424
7425static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 7426 struct nft_object *obj, bool reset)
e5009240
PNA		 7427{
7428 struct nlattr *nest;
7429
ae0be8de 7430 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 7431 if (!nest)
7432 goto nla_put_failure;
dfc46034 7433 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 7434 goto nla_put_failure;
7435 nla_nest_end(skb, nest);
7436 return 0;
7437
7438nla_put_failure:
7439 return -1;
7440}
7441
7442static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
7443{
7444 const struct nft_object_type *type;
7445
7446 list_for_each_entry(type, &nf_tables_objects, list) {
7447 if (objtype == type->type)
7448 return type;
7449 }
7450 return NULL;
7451}
7452
452238e8
FW		 7453static const struct nft_object_type *
7454nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 7455{
7456 const struct nft_object_type *type;
7457
7458 type = __nft_obj_type_get(objtype);
7459 if (type != NULL && try_module_get(type->owner))
7460 return type;
7461
f102d66b 7462 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 7463#ifdef CONFIG_MODULES
7464 if (type == NULL) {
eb014de4 7465 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 7466 return ERR_PTR(-EAGAIN);
7467 }
7468#endif
7469 return ERR_PTR(-ENOENT);
7470}
7471
d62d0ba9
FFM		 7472static int nf_tables_updobj(const struct nft_ctx *ctx,
7473 const struct nft_object_type *type,
7474 const struct nlattr *attr,
7475 struct nft_object *obj)
7476{
7477 struct nft_object *newobj;
7478 struct nft_trans *trans;
dad3bdee
FW		 7479 int err = -ENOMEM;
7480
7481 if (!try_module_get(type->owner))
7482 return -ENOENT;
d62d0ba9
FFM		 7483
7484 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
7485 sizeof(struct nft_trans_obj));
7486 if (!trans)
dad3bdee 7487 goto err_trans;
d62d0ba9
FFM		 7488
7489 newobj = nft_obj_init(ctx, type, attr);
7490 if (IS_ERR(newobj)) {
7491 err = PTR_ERR(newobj);
b74ae961 7492 goto err_free_trans;
d62d0ba9
FFM		 7493 }
7494
7495 nft_trans_obj(trans) = obj;
7496 nft_trans_obj_update(trans) = true;
7497 nft_trans_obj_newobj(trans) = newobj;
0854db2a 7498 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 7499
7500 return 0;
b74ae961
DC		 7501
7502err_free_trans:
d62d0ba9 7503 kfree(trans);
dad3bdee
FW		 7504err_trans:
7505 module_put(type->owner);
d62d0ba9
FFM		 7506 return err;
7507}
7508
7dab8ee3
PNA		 7509static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
7510 const struct nlattr * const nla[])
e5009240 7511{
7dab8ee3
PNA		 7512 struct netlink_ext_ack *extack = info->extack;
7513 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7514 u8 family = info->nfmsg->nfgen_family;
e5009240 7515 const struct nft_object_type *type;
7dab8ee3 7516 struct net *net = info->net;
e5009240
PNA		 7517 struct nft_table *table;
7518 struct nft_object *obj;
7519 struct nft_ctx ctx;
7520 u32 objtype;
7521 int err;
7522
7523 if (!nla[NFTA_OBJ_TYPE] ||
7524 !nla[NFTA_OBJ_NAME] ||
7525 !nla[NFTA_OBJ_DATA])
7526 return -EINVAL;
7527
6001a930
PNA		 7528 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7529 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7530 if (IS_ERR(table)) {
7531 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7532 return PTR_ERR(table);
36dd1bcc 7533 }
e5009240
PNA		 7534
7535 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7536 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 7537 if (IS_ERR(obj)) {
7538 err = PTR_ERR(obj);
36dd1bcc
PNA		 7539 if (err != -ENOENT) {
7540 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7541 return err;
36dd1bcc 7542 }
1a28ad74 7543 } else {
7dab8ee3 7544 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7545 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7546 return -EEXIST;
36dd1bcc 7547 }
7dab8ee3 7548 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 7549 return -EOPNOTSUPP;
7550
fd57d0cb 7551 type = __nft_obj_type_get(objtype);
dac7f50a
AT		 7552 if (WARN_ON_ONCE(!type))
7553 return -ENOENT;
7554
7dab8ee3 7555 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 7556
7557 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 7558 }
7559
7dab8ee3 7560 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 7561
1689f259
PNA		 7562 if (!nft_use_inc(&table->use))
7563 return -EMFILE;
7564
452238e8 7565 type = nft_obj_type_get(net, objtype);
1689f259
PNA		 7566 if (IS_ERR(type)) {
7567 err = PTR_ERR(type);
7568 goto err_type;
7569 }
e5009240 7570
84fba055 7571 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 7572 if (IS_ERR(obj)) {
7573 err = PTR_ERR(obj);
b131c964 7574 goto err_init;
e5009240 7575 }
d152159b 7576 obj->key.table = table;
3ecbfd65
HS		 7577 obj->handle = nf_tables_alloc_handle(table);
7578
33758c89 7579 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 7580 if (!obj->key.name) {
61509575 7581 err = -ENOMEM;
b131c964
JGG		 7582 goto err_strdup;
7583 }
7584
7585 if (nla[NFTA_OBJ_USERDATA]) {
af0acf22 7586 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
b131c964
JGG		 7587 if (obj->udata == NULL)
7588 goto err_userdata;
7589
85db827a 7590 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 7591 }
e5009240
PNA		 7592
7593 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
7594 if (err < 0)
b131c964 7595 goto err_trans;
e5009240 7596
4d44175a
FW		 7597 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
7598 nft_objname_ht_params);
7599 if (err < 0)
b131c964 7600 goto err_obj_ht;
4d44175a 7601
e5009240 7602 list_add_tail_rcu(&obj->list, &table->objects);
1689f259 7603
e5009240 7604 return 0;
b131c964 7605err_obj_ht:
4d44175a
FW		 7606 /* queued in transaction log */
7607 INIT_LIST_HEAD(&obj->list);
7608 return err;
b131c964 7609err_trans:
b131c964 7610 kfree(obj->udata);
85dfd816
PNA		 7611err_userdata:
7612 kfree(obj->key.name);
b131c964 7613err_strdup:
dfc46034 7614 if (obj->ops->destroy)
00bfb320 7615 obj->ops->destroy(&ctx, obj);
e5009240 7616 kfree(obj);
b131c964 7617err_init:
e5009240 7618 module_put(type->owner);
1689f259
PNA		 7619err_type:
7620 nft_use_dec_restore(&table->use);
7621
e5009240
PNA		 7622 return err;
7623}
7624
7625static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
7626 u32 portid, u32 seq, int event, u32 flags,
7627 int family, const struct nft_table *table,
43da04a5 7628 struct nft_object *obj, bool reset)
e5009240 7629{
e5009240
PNA		 7630 struct nlmsghdr *nlh;
7631
dedb67c4 7632 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7633 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7634 NFNETLINK_V0, nft_base_seq(net));
7635 if (!nlh)
e5009240
PNA		 7636 goto nla_put_failure;
7637
e5009240 7638 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 7639 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
3ecbfd65
HS		 7640 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7641 NFTA_OBJ_PAD))
e5009240
PNA		 7642 goto nla_put_failure;
7643
28339b21
PNA		 7644 if (event == NFT_MSG_DELOBJ) {
7645 nlmsg_end(skb, nlh);
7646 return 0;
7647 }
7648
7649 if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
7650 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
7651 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
7652 goto nla_put_failure;
7653
b131c964
JGG		 7654 if (obj->udata &&
7655 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7656 goto nla_put_failure;
7657
e5009240
PNA		 7658 nlmsg_end(skb, nlh);
7659 return 0;
7660
7661nla_put_failure:
7662 nlmsg_trim(skb, nlh);
7663 return -1;
7664}
7665
1baf0152
PS		 7666static void audit_log_obj_reset(const struct nft_table *table,
7667 unsigned int base_seq, unsigned int nentries)
7668{
7669 char *buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, base_seq);
7670
7671 audit_log_nfcfg(buf, table->family, nentries,
7672 AUDIT_NFT_OP_OBJ_RESET, GFP_ATOMIC);
7673 kfree(buf);
7674}
7675
ecf49cad 7676struct nft_obj_dump_ctx {
2eda95cf 7677 unsigned int s_idx;
e46abbcc 7678 char *table;
a9fea2a3 7679 u32 type;
a5523390 7680 bool reset;
a9fea2a3
PNA		 7681};
7682
e5009240
PNA		 7683static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7684{
7685 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
5a893b9c 7686 struct nft_obj_dump_ctx *ctx = (void *)cb->ctx;
e5009240
PNA		 7687 struct net *net = sock_net(skb->sk);
7688 int family = nfmsg->nfgen_family;
0854db2a 7689 struct nftables_pernet *nft_net;
2eda95cf 7690 const struct nft_table *table;
1baf0152 7691 unsigned int entries = 0;
43da04a5 7692 struct nft_object *obj;
2eda95cf 7693 unsigned int idx = 0;
1baf0152 7694 int rc = 0;
43da04a5 7695
e5009240 7696 rcu_read_lock();
d59d2f82 7697 nft_net = nft_pernet(net);
34002783 7698 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 7699
0854db2a 7700 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7701 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 7702 continue;
7703
1baf0152 7704 entries = 0;
36596dad
PNA		 7705 list_for_each_entry_rcu(obj, &table->objects, list) {
7706 if (!nft_is_active(net, obj))
7707 goto cont;
2eda95cf 7708 if (idx < ctx->s_idx)
36596dad 7709 goto cont;
ecf49cad 7710 if (ctx->table && strcmp(ctx->table, table->name))
36596dad 7711 goto cont;
ecf49cad
PS		 7712 if (ctx->type != NFT_OBJECT_UNSPEC &&
7713 obj->ops->type->type != ctx->type)
36596dad 7714 goto cont;
8e6cf365 7715
1baf0152
PS		 7716 rc = nf_tables_fill_obj_info(skb, net,
7717 NETLINK_CB(cb->skb).portid,
7718 cb->nlh->nlmsg_seq,
7719 NFT_MSG_NEWOBJ,
7720 NLM_F_MULTI | NLM_F_APPEND,
7721 table->family, table,
a5523390 7722 obj, ctx->reset);
1baf0152
PS		 7723 if (rc < 0)
7724 break;
e5009240 7725
1baf0152 7726 entries++;
36596dad 7727 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7728cont:
36596dad 7729 idx++;
e5009240 7730 }
a5523390 7731 if (ctx->reset && entries)
1baf0152
PS		 7732 audit_log_obj_reset(table, nft_net->base_seq, entries);
7733 if (rc < 0)
7734 break;
e5009240 7735 }
e5009240
PNA		 7736 rcu_read_unlock();
7737
2eda95cf 7738 ctx->s_idx = idx;
e5009240
PNA		 7739 return skb->len;
7740}
7741
90fd131a 7742static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7743{
5a893b9c 7744 struct nft_obj_dump_ctx *ctx = (void *)cb->ctx;
90fd131a 7745 const struct nlattr * const *nla = cb->data;
e46abbcc 7746
5a893b9c 7747 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
90fd131a 7748
4279cc60 7749 if (nla[NFTA_OBJ_TABLE]) {
ecf49cad 7750 ctx->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
5a893b9c 7751 if (!ctx->table)
4279cc60 7752 return -ENOMEM;
8bea728d 7753 }
a9fea2a3 7754
4279cc60 7755 if (nla[NFTA_OBJ_TYPE])
ecf49cad 7756 ctx->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4279cc60 7757
a5523390
PS		 7758 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7759 ctx->reset = true;
7760
a9fea2a3
PNA		 7761 return 0;
7762}
7763
90fd131a 7764static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7765{
5a893b9c 7766 struct nft_obj_dump_ctx *ctx = (void *)cb->ctx;
a9fea2a3 7767
ecf49cad 7768 kfree(ctx->table);
a9fea2a3 7769
90fd131a 7770 return 0;
a9fea2a3
PNA		 7771}
7772
d9adf22a 7773/* called with rcu_read_lock held */
797d4980
PNA		 7774static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7775 const struct nlattr * const nla[])
e5009240 7776{
797d4980
PNA		 7777 struct netlink_ext_ack *extack = info->extack;
7778 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7779 u8 family = info->nfmsg->nfgen_family;
e5009240 7780 const struct nft_table *table;
797d4980 7781 struct net *net = info->net;
e5009240
PNA		 7782 struct nft_object *obj;
7783 struct sk_buff *skb2;
43da04a5 7784 bool reset = false;
e5009240
PNA		 7785 u32 objtype;
7786 int err;
7787
797d4980 7788 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7789 struct netlink_dump_control c = {
90fd131a 7790 .start = nf_tables_dump_obj_start,
e5009240 7791 .dump = nf_tables_dump_obj,
a9fea2a3 7792 .done = nf_tables_dump_obj_done,
d9adf22a 7793 .module = THIS_MODULE,
90fd131a 7794 .data = (void *)nla,
e5009240 7795 };
a9fea2a3 7796
797d4980 7797 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7798 }
7799
7800 if (!nla[NFTA_OBJ_NAME] ||
7801 !nla[NFTA_OBJ_TYPE])
7802 return -EINVAL;
7803
6001a930 7804 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7805 if (IS_ERR(table)) {
7806 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7807 return PTR_ERR(table);
36dd1bcc 7808 }
e5009240
PNA		 7809
7810 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7811 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7812 if (IS_ERR(obj)) {
7813 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7814 return PTR_ERR(obj);
36dd1bcc 7815 }
e5009240 7816
d9adf22a 7817 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7818 if (!skb2)
7819 return -ENOMEM;
7820
797d4980 7821 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7822 reset = true;
7823
8e6cf365 7824 if (reset) {
0854db2a
FW		 7825 const struct nftables_pernet *nft_net;
7826 char *buf;
7827
d59d2f82 7828 nft_net = nft_pernet(net);
0854db2a 7829 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7830
7831 audit_log_nfcfg(buf,
7832 family,
1baf0152 7833 1,
14224039 7834 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7835 GFP_ATOMIC);
8e6cf365
RGB		 7836 kfree(buf);
7837 }
7838
e5009240 7839 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7840 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7841 family, table, obj, reset);
e5009240 7842 if (err < 0)
ee921183 7843 goto err_fill_obj_info;
e5009240 7844
ee921183
PNA		 7845 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7846
7847err_fill_obj_info:
e5009240
PNA		 7848 kfree_skb(skb2);
7849 return err;
e5009240
PNA		 7850}
7851
00bfb320 7852static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7853{
dfc46034 7854 if (obj->ops->destroy)
00bfb320 7855 obj->ops->destroy(ctx, obj);
e5009240 7856
dfc46034 7857 module_put(obj->ops->type->owner);
d152159b 7858 kfree(obj->key.name);
bc7a7082 7859 kfree(obj->udata);
e5009240
PNA		 7860 kfree(obj);
7861}
7862
7dab8ee3
PNA		 7863static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7864 const struct nlattr * const nla[])
e5009240 7865{
7dab8ee3
PNA		 7866 struct netlink_ext_ack *extack = info->extack;
7867 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7868 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7869 struct net *net = info->net;
36dd1bcc 7870 const struct nlattr *attr;
e5009240
PNA		 7871 struct nft_table *table;
7872 struct nft_object *obj;
7873 struct nft_ctx ctx;
7874 u32 objtype;
7875
7876 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7877 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7878 return -EINVAL;
7879
6001a930
PNA		 7880 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7881 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7882 if (IS_ERR(table)) {
7883 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7884 return PTR_ERR(table);
36dd1bcc 7885 }
e5009240
PNA		 7886
7887 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7888 if (nla[NFTA_OBJ_HANDLE]) {
7889 attr = nla[NFTA_OBJ_HANDLE];
7890 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7891 } else {
7892 attr = nla[NFTA_OBJ_NAME];
4d44175a 7893 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7894 }
7895
7896 if (IS_ERR(obj)) {
f80a612d
FFM		 7897 if (PTR_ERR(obj) == -ENOENT &&
7898 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
7899 return 0;
7900
36dd1bcc 7901 NL_SET_BAD_ATTR(extack, attr);
e5009240 7902 return PTR_ERR(obj);
36dd1bcc
PNA		 7903 }
7904 if (obj->use > 0) {
7905 NL_SET_BAD_ATTR(extack, attr);
e5009240 7906 return -EBUSY;
36dd1bcc 7907 }
e5009240 7908
7dab8ee3 7909 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7910
7911 return nft_delobj(&ctx, obj);
7912}
7913
0d880dc6
PS		 7914static void
7915__nft_obj_notify(struct net *net, const struct nft_table *table,
7916 struct nft_object *obj, u32 portid, u32 seq, int event,
7917 u16 flags, int family, int report, gfp_t gfp)
e5009240 7918{
d59d2f82 7919 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7920 struct sk_buff *skb;
7921 int err;
7922
2599e989
PNA		 7923 if (!report &&
7924 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7925 return;
e5009240 7926
2599e989 7927 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7928 if (skb == NULL)
7929 goto err;
7930
6fb721cf
PNA		 7931 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7932 flags & (NLM_F_CREATE | NLM_F_EXCL),
7933 family, table, obj, false);
e5009240
PNA		 7934 if (err < 0) {
7935 kfree_skb(skb);
7936 goto err;
7937 }
7938
0854db2a 7939 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7940 return;
e5009240 7941err:
25e94a99 7942 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7943}
0d880dc6
PS		 7944
7945void nft_obj_notify(struct net *net, const struct nft_table *table,
7946 struct nft_object *obj, u32 portid, u32 seq, int event,
7947 u16 flags, int family, int report, gfp_t gfp)
7948{
7949 struct nftables_pernet *nft_net = nft_pernet(net);
7950 char *buf = kasprintf(gfp, "%s:%u",
7951 table->name, nft_net->base_seq);
7952
7953 audit_log_nfcfg(buf,
7954 family,
7955 obj->handle,
7956 event == NFT_MSG_NEWOBJ ?
7957 AUDIT_NFT_OP_OBJ_REGISTER :
7958 AUDIT_NFT_OP_OBJ_UNREGISTER,
7959 gfp);
7960 kfree(buf);
7961
7962 __nft_obj_notify(net, table, obj, portid, seq, event,
7963 flags, family, report, gfp);
7964}
2599e989
PNA		 7965EXPORT_SYMBOL_GPL(nft_obj_notify);
7966
25e94a99
PNA		 7967static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7968 struct nft_object *obj, int event)
2599e989 7969{
0d880dc6
PS		 7970 __nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid,
7971 ctx->seq, event, ctx->flags, ctx->family,
7972 ctx->report, GFP_KERNEL);
2599e989 7973}
e5009240 7974
3b49e2e9
PNA		 7975/*
7976 * Flow tables
7977 */
7978void nft_register_flowtable_type(struct nf_flowtable_type *type)
7979{
7980 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7981 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7982 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7983}
7984EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7985
7986void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7987{
7988 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7989 list_del_rcu(&type->list);
7990 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7991}
7992EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7993
7994static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7995 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7996 .len = NFT_NAME_MAXLEN - 1 },
7997 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7998 .len = NFT_NAME_MAXLEN - 1 },
7999 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 8000 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 8001 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 8002};
8003
cac20fcd
PNA		 8004struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
8005 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 8006{
8007 struct nft_flowtable *flowtable;
8008
d9adf22a 8009 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 8010 if (!nla_strcmp(nla, flowtable->name) &&
8011 nft_active_genmask(flowtable, genmask))
8012 return flowtable;
8013 }
8014 return ERR_PTR(-ENOENT);
8015}
cac20fcd 8016EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 8017
9b05b6e1
LGL		 8018void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
8019 struct nft_flowtable *flowtable,
8020 enum nft_trans_phase phase)
8021{
8022 switch (phase) {
26b5a571 8023 case NFT_TRANS_PREPARE_ERROR:
9b05b6e1
LGL		 8024 case NFT_TRANS_PREPARE:
8025 case NFT_TRANS_ABORT:
8026 case NFT_TRANS_RELEASE:
1689f259 8027 nft_use_dec(&flowtable->use);
954d8297 8028 fallthrough;
9b05b6e1
LGL		 8029 default:
8030 return;
8031 }
8032}
8033EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
8034
ae0662f8 8035static struct nft_flowtable *
cac20fcd
PNA		 8036nft_flowtable_lookup_byhandle(const struct nft_table *table,
8037 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 8038{
8039 struct nft_flowtable *flowtable;
8040
8041 list_for_each_entry(flowtable, &table->flowtables, list) {
8042 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
8043 nft_active_genmask(flowtable, genmask))
8044 return flowtable;
8045 }
8046 return ERR_PTR(-ENOENT);
8047}
8048
d9246a53
PNA		 8049struct nft_flowtable_hook {
8050 u32 num;
8051 int priority;
8052 struct list_head list;
8053};
8054
3b49e2e9
PNA		 8055static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
8056 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
8057 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
8058 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
8059};
8060
d9246a53 8061static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
8509f62b 8062 const struct nlattr * const nla[],
d9246a53 8063 struct nft_flowtable_hook *flowtable_hook,
c3c060ad
PNA		 8064 struct nft_flowtable *flowtable,
8065 struct netlink_ext_ack *extack, bool add)
3b49e2e9 8066{
3b49e2e9 8067 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 8068 struct nft_hook *hook;
3b49e2e9 8069 int hooknum, priority;
3f0465a9 8070 int err;
3b49e2e9 8071
d9246a53
PNA		 8072 INIT_LIST_HEAD(&flowtable_hook->list);
8073
8509f62b
PNA		 8074 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX,
8075 nla[NFTA_FLOWTABLE_HOOK],
8cb08174 8076 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 8077 if (err < 0)
8078 return err;
8079
5b6743fb
PNA		 8080 if (add) {
8081 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
8509f62b
PNA		 8082 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
8083 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8084 return -ENOENT;
8085 }
3b49e2e9 8086
5b6743fb
PNA		 8087 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
8088 if (hooknum != NF_NETDEV_INGRESS)
8089 return -EOPNOTSUPP;
8090
8091 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
8092
8093 flowtable_hook->priority = priority;
8094 flowtable_hook->num = hooknum;
8095 } else {
8096 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
8097 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
8098 if (hooknum != flowtable->hooknum)
8099 return -EOPNOTSUPP;
8100 }
8101
8102 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
8103 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
8104 if (priority != flowtable->data.priority)
8105 return -EOPNOTSUPP;
8106 }
3b49e2e9 8107
5b6743fb
PNA		 8108 flowtable_hook->priority = flowtable->data.priority;
8109 flowtable_hook->num = flowtable->hooknum;
8110 }
3b49e2e9 8111
05abe445
PNA		 8112 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
8113 err = nf_tables_parse_netdev_hooks(ctx->net,
8114 tb[NFTA_FLOWTABLE_HOOK_DEVS],
c3c060ad
PNA		 8115 &flowtable_hook->list,
8116 extack);
05abe445
PNA		 8117 if (err < 0)
8118 return err;
8119 }
3b49e2e9 8120
d9246a53 8121 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 8122 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 8123 hook->ops.hooknum = flowtable_hook->num;
8124 hook->ops.priority = flowtable_hook->priority;
8125 hook->ops.priv = &flowtable->data;
8126 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 8127 }
8128
3b49e2e9
PNA		 8129 return err;
8130}
8131
98319cb9 8132static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 8133{
8134 const struct nf_flowtable_type *type;
8135
8136 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 8137 if (family == type->family)
3b49e2e9
PNA		 8138 return type;
8139 }
8140 return NULL;
8141}
8142
452238e8
FW		 8143static const struct nf_flowtable_type *
8144nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 8145{
8146 const struct nf_flowtable_type *type;
8147
98319cb9 8148 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 8149 if (type != NULL && try_module_get(type->owner))
8150 return type;
8151
f102d66b 8152 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 8153#ifdef CONFIG_MODULES
8154 if (type == NULL) {
eb014de4 8155 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 8156 return ERR_PTR(-EAGAIN);
8157 }
8158#endif
8159 return ERR_PTR(-ENOENT);
8160}
8161
5acab914 8162/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 8163static void nft_unregister_flowtable_hook(struct net *net,
8164 struct nft_flowtable *flowtable,
8165 struct nft_hook *hook)
8166{
8167 nf_unregister_net_hook(net, &hook->ops);
8168 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8169 FLOW_BLOCK_UNBIND);
8170}
8171
f9a43007
PNA		 8172static void __nft_unregister_flowtable_net_hooks(struct net *net,
8173 struct list_head *hook_list,
8174 bool release_netdev)
3b49e2e9 8175{
f9a43007 8176 struct nft_hook *hook, *next;
3b49e2e9 8177
f9a43007 8178 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 8179 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 8180 if (release_netdev) {
8181 list_del(&hook->list);
ab5e5c06 8182 kfree_rcu(hook, rcu);
f9a43007
PNA		 8183 }
8184 }
8185}
8186
8187static void nft_unregister_flowtable_net_hooks(struct net *net,
8188 struct list_head *hook_list)
8189{
8190 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 8191}
8192
8193static int nft_register_flowtable_net_hooks(struct net *net,
8194 struct nft_table *table,
f9382669 8195 struct list_head *hook_list,
3f0465a9
PNA		 8196 struct nft_flowtable *flowtable)
8197{
8198 struct nft_hook *hook, *hook2, *next;
8199 struct nft_flowtable *ft;
8200 int err, i = 0;
8201
f9382669 8202 list_for_each_entry(hook, hook_list, list) {
3f0465a9 8203 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 8204 if (!nft_is_active_next(net, ft))
8205 continue;
8206
3f0465a9
PNA		 8207 list_for_each_entry(hook2, &ft->hook_list, list) {
8208 if (hook->ops.dev == hook2->ops.dev &&
8209 hook->ops.pf == hook2->ops.pf) {
77a92189 8210 err = -EEXIST;
3f0465a9
PNA		 8211 goto err_unregister_net_hooks;
8212 }
8213 }
8214 }
3b49e2e9 8215
d7c03a9f 8216 err = flowtable->data.type->setup(&flowtable->data,
8217 hook->ops.dev,
8218 FLOW_BLOCK_BIND);
3f0465a9
PNA		 8219 if (err < 0)
8220 goto err_unregister_net_hooks;
8221
d7c03a9f 8222 err = nf_register_net_hook(net, &hook->ops);
8223 if (err < 0) {
8224 flowtable->data.type->setup(&flowtable->data,
8225 hook->ops.dev,
8226 FLOW_BLOCK_UNBIND);
8227 goto err_unregister_net_hooks;
8228 }
8229
3f0465a9 8230 i++;
3b49e2e9 8231 }
3f0465a9
PNA		 8232
8233 return 0;
8234
8235err_unregister_net_hooks:
f9382669 8236 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 8237 if (i-- <= 0)
8238 break;
8239
ff4bf2f4 8240 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8241 list_del_rcu(&hook->list);
8242 kfree_rcu(hook, rcu);
8243 }
8244
8245 return err;
3b49e2e9
PNA		 8246}
8247
cdc32546 8248static void nft_hooks_destroy(struct list_head *hook_list)
389a2cbc
PNA		 8249{
8250 struct nft_hook *hook, *next;
8251
8252 list_for_each_entry_safe(hook, next, hook_list, list) {
8253 list_del_rcu(&hook->list);
8254 kfree_rcu(hook, rcu);
8255 }
8256}
8257
78d9f48f 8258static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
c3c060ad
PNA		 8259 struct nft_flowtable *flowtable,
8260 struct netlink_ext_ack *extack)
78d9f48f
PNA		 8261{
8262 const struct nlattr * const *nla = ctx->nla;
8263 struct nft_flowtable_hook flowtable_hook;
8264 struct nft_hook *hook, *next;
8265 struct nft_trans *trans;
8266 bool unregister = false;
7b35582c 8267 u32 flags;
78d9f48f
PNA		 8268 int err;
8269
8509f62b
PNA		 8270 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8271 extack, false);
78d9f48f
PNA		 8272 if (err < 0)
8273 return err;
8274
8275 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8276 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
8277 list_del(&hook->list);
8278 kfree(hook);
8279 }
8280 }
8281
7b35582c
PNA		 8282 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8283 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 8284 if (flags & ~NFT_FLOWTABLE_MASK) {
8285 err = -EOPNOTSUPP;
8286 goto err_flowtable_update_hook;
8287 }
7b35582c 8288 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 8289 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
8290 err = -EOPNOTSUPP;
8291 goto err_flowtable_update_hook;
8292 }
7b35582c
PNA		 8293 } else {
8294 flags = flowtable->data.flags;
8295 }
8296
78d9f48f
PNA		 8297 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
8298 &flowtable_hook.list, flowtable);
8299 if (err < 0)
8300 goto err_flowtable_update_hook;
8301
8302 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
8303 sizeof(struct nft_trans_flowtable));
8304 if (!trans) {
8305 unregister = true;
8306 err = -ENOMEM;
8307 goto err_flowtable_update_hook;
8308 }
8309
7b35582c 8310 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 8311 nft_trans_flowtable(trans) = flowtable;
8312 nft_trans_flowtable_update(trans) = true;
8313 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
8314 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
8315
0854db2a 8316 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 8317
8318 return 0;
8319
8320err_flowtable_update_hook:
8321 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8322 if (unregister)
8323 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
8324 list_del_rcu(&hook->list);
8325 kfree_rcu(hook, rcu);
8326 }
8327
8328 return err;
8329
8330}
8331
7dab8ee3
PNA		 8332static int nf_tables_newflowtable(struct sk_buff *skb,
8333 const struct nfnl_info *info,
8334 const struct nlattr * const nla[])
3b49e2e9 8335{
7dab8ee3 8336 struct netlink_ext_ack *extack = info->extack;
d9246a53 8337 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 8338 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8339 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8340 const struct nf_flowtable_type *type;
3f0465a9
PNA		 8341 struct nft_flowtable *flowtable;
8342 struct nft_hook *hook, *next;
7dab8ee3 8343 struct net *net = info->net;
3b49e2e9
PNA		 8344 struct nft_table *table;
8345 struct nft_ctx ctx;
3f0465a9 8346 int err;
3b49e2e9
PNA		 8347
8348 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8349 !nla[NFTA_FLOWTABLE_NAME] ||
8350 !nla[NFTA_FLOWTABLE_HOOK])
8351 return -EINVAL;
8352
cac20fcd 8353 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8354 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8355 if (IS_ERR(table)) {
8356 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8357 return PTR_ERR(table);
36dd1bcc 8358 }
3b49e2e9 8359
cac20fcd
PNA		 8360 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8361 genmask);
3b49e2e9
PNA		 8362 if (IS_ERR(flowtable)) {
8363 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 8364 if (err != -ENOENT) {
8365 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8366 return err;
36dd1bcc 8367 }
3b49e2e9 8368 } else {
7dab8ee3 8369 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 8370 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8371 return -EEXIST;
36dd1bcc 8372 }
3b49e2e9 8373
7dab8ee3 8374 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 8375
c3c060ad 8376 return nft_flowtable_update(&ctx, info->nlh, flowtable, extack);
3b49e2e9
PNA		 8377 }
8378
7dab8ee3 8379 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 8380
1689f259
PNA		 8381 if (!nft_use_inc(&table->use))
8382 return -EMFILE;
8383
33758c89 8384 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
1689f259
PNA		 8385 if (!flowtable) {
8386 err = -ENOMEM;
8387 goto flowtable_alloc;
8388 }
3b49e2e9
PNA		 8389
8390 flowtable->table = table;
3ecbfd65 8391 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 8392 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 8393
33758c89 8394 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 8395 if (!flowtable->name) {
8396 err = -ENOMEM;
8397 goto err1;
8398 }
8399
452238e8 8400 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 8401 if (IS_ERR(type)) {
8402 err = PTR_ERR(type);
8403 goto err2;
8404 }
8405
8bb69f3b
PNA		 8406 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8407 flowtable->data.flags =
8408 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 8409 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
8410 err = -EOPNOTSUPP;
8bb69f3b 8411 goto err3;
7e6136f1 8412 }
8bb69f3b
PNA		 8413 }
8414
8415 write_pnet(&flowtable->data.net, net);
3b49e2e9 8416 flowtable->data.type = type;
a268de77 8417 err = type->init(&flowtable->data);
3b49e2e9
PNA		 8418 if (err < 0)
8419 goto err3;
8420
8509f62b
PNA		 8421 err = nft_flowtable_parse_hook(&ctx, nla, &flowtable_hook, flowtable,
8422 extack, true);
3b49e2e9 8423 if (err < 0)
a268de77 8424 goto err4;
3b49e2e9 8425
d9246a53
PNA		 8426 list_splice(&flowtable_hook.list, &flowtable->hook_list);
8427 flowtable->data.priority = flowtable_hook.priority;
8428 flowtable->hooknum = flowtable_hook.num;
8429
f9382669
PNA		 8430 err = nft_register_flowtable_net_hooks(ctx.net, table,
8431 &flowtable->hook_list,
8432 flowtable);
2d285f26 8433 if (err < 0) {
cdc32546 8434 nft_hooks_destroy(&flowtable->hook_list);
3f0465a9 8435 goto err4;
2d285f26 8436 }
3b49e2e9
PNA		 8437
8438 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
8439 if (err < 0)
3f0465a9 8440 goto err5;
3b49e2e9
PNA		 8441
8442 list_add_tail_rcu(&flowtable->list, &table->flowtables);
3b49e2e9
PNA		 8443
8444 return 0;
a268de77 8445err5:
3f0465a9 8446 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 8447 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8448 list_del_rcu(&hook->list);
8449 kfree_rcu(hook, rcu);
8450 }
a268de77
FF		 8451err4:
8452 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 8453err3:
8454 module_put(type->owner);
8455err2:
8456 kfree(flowtable->name);
8457err1:
8458 kfree(flowtable);
1689f259
PNA		 8459flowtable_alloc:
8460 nft_use_dec_restore(&table->use);
8461
3b49e2e9
PNA		 8462 return err;
8463}
8464
3003055f
PNA		 8465static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
8466{
8467 struct nft_hook *this, *next;
8468
8469 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
8470 list_del(&this->list);
8471 kfree(this);
8472 }
8473}
8474
abadb2f8 8475static int nft_delflowtable_hook(struct nft_ctx *ctx,
c3c060ad
PNA		 8476 struct nft_flowtable *flowtable,
8477 struct netlink_ext_ack *extack)
abadb2f8
PNA		 8478{
8479 const struct nlattr * const *nla = ctx->nla;
8480 struct nft_flowtable_hook flowtable_hook;
b6d9014a 8481 LIST_HEAD(flowtable_del_list);
3003055f 8482 struct nft_hook *this, *hook;
abadb2f8
PNA		 8483 struct nft_trans *trans;
8484 int err;
8485
8509f62b
PNA		 8486 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8487 extack, false);
abadb2f8
PNA		 8488 if (err < 0)
8489 return err;
8490
3003055f 8491 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 8492 hook = nft_hook_list_find(&flowtable->hook_list, this);
8493 if (!hook) {
8494 err = -ENOENT;
8495 goto err_flowtable_del_hook;
8496 }
b6d9014a 8497 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 8498 }
8499
8500 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
8501 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 8502 if (!trans) {
8503 err = -ENOMEM;
8504 goto err_flowtable_del_hook;
8505 }
abadb2f8
PNA		 8506
8507 nft_trans_flowtable(trans) = flowtable;
8508 nft_trans_flowtable_update(trans) = true;
8509 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 8510 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 8511 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 8512
0854db2a 8513 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 8514
8515 return 0;
8516
8517err_flowtable_del_hook:
b6d9014a 8518 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 8519 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 8520
8521 return err;
8522}
8523
7dab8ee3
PNA		 8524static int nf_tables_delflowtable(struct sk_buff *skb,
8525 const struct nfnl_info *info,
8526 const struct nlattr * const nla[])
3b49e2e9 8527{
7dab8ee3
PNA		 8528 struct netlink_ext_ack *extack = info->extack;
8529 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8530 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8531 struct nft_flowtable *flowtable;
7dab8ee3 8532 struct net *net = info->net;
36dd1bcc 8533 const struct nlattr *attr;
3b49e2e9
PNA		 8534 struct nft_table *table;
8535 struct nft_ctx ctx;
8536
e603ea4b
PNA		 8537 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8538 (!nla[NFTA_FLOWTABLE_NAME] &&
8539 !nla[NFTA_FLOWTABLE_HANDLE]))
8540 return -EINVAL;
8541
cac20fcd 8542 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8543 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8544 if (IS_ERR(table)) {
8545 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8546 return PTR_ERR(table);
36dd1bcc 8547 }
3b49e2e9 8548
36dd1bcc
PNA		 8549 if (nla[NFTA_FLOWTABLE_HANDLE]) {
8550 attr = nla[NFTA_FLOWTABLE_HANDLE];
8551 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
8552 } else {
8553 attr = nla[NFTA_FLOWTABLE_NAME];
8554 flowtable = nft_flowtable_lookup(table, attr, genmask);
8555 }
8556
8557 if (IS_ERR(flowtable)) {
f80a612d
FFM		 8558 if (PTR_ERR(flowtable) == -ENOENT &&
8559 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
8560 return 0;
8561
36dd1bcc
PNA		 8562 NL_SET_BAD_ATTR(extack, attr);
8563 return PTR_ERR(flowtable);
8564 }
abadb2f8 8565
7dab8ee3 8566 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 8567
8568 if (nla[NFTA_FLOWTABLE_HOOK])
c3c060ad 8569 return nft_delflowtable_hook(&ctx, flowtable, extack);
abadb2f8 8570
36dd1bcc
PNA		 8571 if (flowtable->use > 0) {
8572 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 8573 return -EBUSY;
36dd1bcc 8574 }
3b49e2e9 8575
3b49e2e9
PNA		 8576 return nft_delflowtable(&ctx, flowtable);
8577}
8578
8579static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
8580 u32 portid, u32 seq, int event,
8581 u32 flags, int family,
c42d8bda
PNA		 8582 struct nft_flowtable *flowtable,
8583 struct list_head *hook_list)
3b49e2e9
PNA		 8584{
8585 struct nlattr *nest, *nest_devs;
3f0465a9 8586 struct nft_hook *hook;
3b49e2e9 8587 struct nlmsghdr *nlh;
3b49e2e9
PNA		 8588
8589 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 8590 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
8591 NFNETLINK_V0, nft_base_seq(net));
8592 if (!nlh)
3b49e2e9
PNA		 8593 goto nla_put_failure;
8594
3b49e2e9
PNA		 8595 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
8596 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65 8597 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
28339b21
PNA		 8598 NFTA_FLOWTABLE_PAD))
8599 goto nla_put_failure;
8600
8601 if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
8602 nlmsg_end(skb, nlh);
8603 return 0;
8604 }
8605
8606 if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
8bb69f3b 8607 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 8608 goto nla_put_failure;
8609
ae0be8de 8610 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 8611 if (!nest)
8612 goto nla_put_failure;
3b49e2e9 8613 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 8614 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 8615 goto nla_put_failure;
8616
ae0be8de 8617 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 8618 if (!nest_devs)
8619 goto nla_put_failure;
8620
28339b21
PNA		 8621 if (!hook_list)
8622 hook_list = &flowtable->hook_list;
8623
c42d8bda 8624 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 8625 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 8626 goto nla_put_failure;
8627 }
8628 nla_nest_end(skb, nest_devs);
8629 nla_nest_end(skb, nest);
8630
8631 nlmsg_end(skb, nlh);
8632 return 0;
8633
8634nla_put_failure:
8635 nlmsg_trim(skb, nlh);
8636 return -1;
8637}
8638
8639struct nft_flowtable_filter {
8640 char *table;
8641};
8642
8643static int nf_tables_dump_flowtable(struct sk_buff *skb,
8644 struct netlink_callback *cb)
8645{
8646 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
8647 struct nft_flowtable_filter *filter = cb->data;
8648 unsigned int idx = 0, s_idx = cb->args[0];
8649 struct net *net = sock_net(skb->sk);
8650 int family = nfmsg->nfgen_family;
8651 struct nft_flowtable *flowtable;
0854db2a 8652 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 8653 const struct nft_table *table;
8654
8655 rcu_read_lock();
d59d2f82 8656 nft_net = nft_pernet(net);
34002783 8657 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 8658
0854db2a 8659 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 8660 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 8661 continue;
8662
36596dad
PNA		 8663 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8664 if (!nft_is_active(net, flowtable))
8665 goto cont;
8666 if (idx < s_idx)
8667 goto cont;
8668 if (idx > s_idx)
8669 memset(&cb->args[1], 0,
8670 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 8671 if (filter && filter->table &&
36596dad
PNA		 8672 strcmp(filter->table, table->name))
8673 goto cont;
3b49e2e9 8674
36596dad
PNA		 8675 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
8676 cb->nlh->nlmsg_seq,
8677 NFT_MSG_NEWFLOWTABLE,
8678 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda 8679 table->family,
28339b21 8680 flowtable, NULL) < 0)
36596dad 8681 goto done;
3b49e2e9 8682
36596dad 8683 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 8684cont:
36596dad 8685 idx++;
3b49e2e9
PNA		 8686 }
8687 }
8688done:
8689 rcu_read_unlock();
8690
8691 cb->args[0] = idx;
8692 return skb->len;
8693}
8694
90fd131a 8695static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 8696{
90fd131a
FW		 8697 const struct nlattr * const *nla = cb->data;
8698 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 8699
90fd131a
FW		 8700 if (nla[NFTA_FLOWTABLE_TABLE]) {
8701 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8702 if (!filter)
8703 return -ENOMEM;
3b49e2e9 8704
90fd131a
FW		 8705 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8706 GFP_ATOMIC);
8707 if (!filter->table) {
8708 kfree(filter);
8709 return -ENOMEM;
8710 }
8711 }
3b49e2e9 8712
90fd131a 8713 cb->data = filter;
3b49e2e9
PNA		 8714 return 0;
8715}
8716
90fd131a 8717static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 8718{
90fd131a 8719 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 8720
3b49e2e9 8721 if (!filter)
90fd131a 8722 return 0;
3b49e2e9 8723
90fd131a
FW		 8724 kfree(filter->table);
8725 kfree(filter);
8726
8727 return 0;
3b49e2e9
PNA		 8728}
8729
d9adf22a 8730/* called with rcu_read_lock held */
797d4980
PNA		 8731static int nf_tables_getflowtable(struct sk_buff *skb,
8732 const struct nfnl_info *info,
8733 const struct nlattr * const nla[])
3b49e2e9 8734{
aee1f692 8735 struct netlink_ext_ack *extack = info->extack;
797d4980 8736 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8737 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8738 struct nft_flowtable *flowtable;
3b49e2e9 8739 const struct nft_table *table;
797d4980 8740 struct net *net = info->net;
3b49e2e9
PNA		 8741 struct sk_buff *skb2;
8742 int err;
8743
797d4980 8744 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8745 struct netlink_dump_control c = {
90fd131a 8746 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8747 .dump = nf_tables_dump_flowtable,
8748 .done = nf_tables_dump_flowtable_done,
d9adf22a 8749 .module = THIS_MODULE,
90fd131a 8750 .data = (void *)nla,
3b49e2e9
PNA		 8751 };
8752
797d4980 8753 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8754 }
8755
8756 if (!nla[NFTA_FLOWTABLE_NAME])
8757 return -EINVAL;
8758
cac20fcd 8759 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8760 genmask, 0);
aee1f692
PNA		 8761 if (IS_ERR(table)) {
8762 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8763 return PTR_ERR(table);
aee1f692 8764 }
3b49e2e9 8765
cac20fcd
PNA		 8766 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8767 genmask);
aee1f692
PNA		 8768 if (IS_ERR(flowtable)) {
8769 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8770 return PTR_ERR(flowtable);
aee1f692 8771 }
3b49e2e9 8772
d9adf22a 8773 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8774 if (!skb2)
8775 return -ENOMEM;
8776
8777 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8778 info->nlh->nlmsg_seq,
3b49e2e9 8779 NFT_MSG_NEWFLOWTABLE, 0, family,
28339b21 8780 flowtable, NULL);
3b49e2e9 8781 if (err < 0)
ee921183 8782 goto err_fill_flowtable_info;
3b49e2e9 8783
ee921183
PNA		 8784 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8785
8786err_fill_flowtable_info:
3b49e2e9
PNA		 8787 kfree_skb(skb2);
8788 return err;
8789}
8790
8791static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8792 struct nft_flowtable *flowtable,
28339b21 8793 struct list_head *hook_list, int event)
3b49e2e9 8794{
d59d2f82 8795 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8796 struct sk_buff *skb;
6fb721cf 8797 u16 flags = 0;
3b49e2e9
PNA		 8798 int err;
8799
dceababa 8800 if (!ctx->report &&
3b49e2e9
PNA		 8801 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8802 return;
8803
8804 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8805 if (skb == NULL)
8806 goto err;
8807
6fb721cf
PNA		 8808 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8809 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8810
3b49e2e9 8811 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8812 ctx->seq, event, flags,
c42d8bda 8813 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8814 if (err < 0) {
8815 kfree_skb(skb);
8816 goto err;
8817 }
8818
0854db2a 8819 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8820 return;
8821err:
8822 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8823}
8824
3b49e2e9
PNA		 8825static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8826{
3f0465a9
PNA		 8827 struct nft_hook *hook, *next;
8828
5acab914 8829 flowtable->data.type->free(&flowtable->data);
3f0465a9 8830 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8831 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8832 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8833 list_del_rcu(&hook->list);
8834 kfree(hook);
8835 }
3b49e2e9 8836 kfree(flowtable->name);
3b49e2e9 8837 module_put(flowtable->data.type->owner);
a12486eb 8838 kfree(flowtable);
3b49e2e9
PNA		 8839}
8840
84d7fce6
PNA		 8841static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8842 u32 portid, u32 seq)
8843{
d59d2f82 8844 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8845 struct nlmsghdr *nlh;
784b4e61 8846 char buf[TASK_COMM_LEN];
dedb67c4 8847 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8848
19c28b13
PNA		 8849 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8850 NFNETLINK_V0, nft_base_seq(net));
8851 if (!nlh)
84d7fce6
PNA		 8852 goto nla_put_failure;
8853
0854db2a 8854 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8855 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8856 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8857 goto nla_put_failure;
8858
053c095a
JB		 8859 nlmsg_end(skb, nlh);
8860 return 0;
84d7fce6
PNA		 8861
8862nla_put_failure:
8863 nlmsg_trim(skb, nlh);
8864 return -EMSGSIZE;
8865}
8866
3b49e2e9
PNA		 8867static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8868 struct nft_flowtable *flowtable)
8869{
3f0465a9 8870 struct nft_hook *hook;
3b49e2e9 8871
3f0465a9
PNA		 8872 list_for_each_entry(hook, &flowtable->hook_list, list) {
8873 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8874 continue;
8875
5acab914 8876 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8877 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8878 list_del_rcu(&hook->list);
8879 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8880 break;
8881 }
8882}
8883
8884static int nf_tables_flowtable_event(struct notifier_block *this,
8885 unsigned long event, void *ptr)
8886{
8887 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8888 struct nft_flowtable *flowtable;
0854db2a 8889 struct nftables_pernet *nft_net;
3b49e2e9 8890 struct nft_table *table;
0a2cf5ee 8891 struct net *net;
3b49e2e9
PNA		 8892
8893 if (event != NETDEV_UNREGISTER)
8894 return 0;
8895
6a48de01 8896 net = dev_net(dev);
d59d2f82 8897 nft_net = nft_pernet(net);
0854db2a
FW		 8898 mutex_lock(&nft_net->commit_mutex);
8899 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8900 list_for_each_entry(flowtable, &table->flowtables, list) {
8901 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8902 }
8903 }
0854db2a 8904 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8905
3b49e2e9
PNA		 8906 return NOTIFY_DONE;
8907}
8908
8909static struct notifier_block nf_tables_flowtable_notifier = {
8910 .notifier_call = nf_tables_flowtable_event,
8911};
8912
25e94a99
PNA		 8913static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8914 int event)
84d7fce6
PNA		 8915{
8916 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8917 struct sk_buff *skb2;
8918 int err;
8919
dceababa 8920 if (!nlmsg_report(nlh) &&
84d7fce6 8921 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8922 return;
84d7fce6 8923
84d7fce6
PNA		 8924 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8925 if (skb2 == NULL)
8926 goto err;
8927
8928 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8929 nlh->nlmsg_seq);
8930 if (err < 0) {
8931 kfree_skb(skb2);
8932 goto err;
8933 }
8934
25e94a99
PNA		 8935 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8936 nlmsg_report(nlh), GFP_KERNEL);
8937 return;
84d7fce6 8938err:
25e94a99
PNA		 8939 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8940 -ENOBUFS);
84d7fce6
PNA		 8941}
8942
797d4980
PNA		 8943static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8944 const struct nlattr * const nla[])
84d7fce6 8945{
84d7fce6
PNA		 8946 struct sk_buff *skb2;
8947 int err;
8948
d9adf22a 8949 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8950 if (skb2 == NULL)
8951 return -ENOMEM;
8952
797d4980
PNA		 8953 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8954 info->nlh->nlmsg_seq);
84d7fce6 8955 if (err < 0)
ee921183 8956 goto err_fill_gen_info;
84d7fce6 8957
797d4980 8958 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8959
8960err_fill_gen_info:
84d7fce6
PNA		 8961 kfree_skb(skb2);
8962 return err;
8963}
8964
96518518
PM		 8965static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8966 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8967 .call = nf_tables_newtable,
8968 .type = NFNL_CB_BATCH,
96518518
PM		 8969 .attr_count = NFTA_TABLE_MAX,
8970 .policy = nft_table_policy,
8971 },
8972 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8973 .call = nf_tables_gettable,
8974 .type = NFNL_CB_RCU,
96518518
PM		 8975 .attr_count = NFTA_TABLE_MAX,
8976 .policy = nft_table_policy,
8977 },
8978 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8979 .call = nf_tables_deltable,
8980 .type = NFNL_CB_BATCH,
96518518
PM		 8981 .attr_count = NFTA_TABLE_MAX,
8982 .policy = nft_table_policy,
8983 },
f80a612d
FFM		 8984 [NFT_MSG_DESTROYTABLE] = {
8985 .call = nf_tables_deltable,
8986 .type = NFNL_CB_BATCH,
8987 .attr_count = NFTA_TABLE_MAX,
8988 .policy = nft_table_policy,
8989 },
96518518 8990 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8991 .call = nf_tables_newchain,
8992 .type = NFNL_CB_BATCH,
96518518
PM		 8993 .attr_count = NFTA_CHAIN_MAX,
8994 .policy = nft_chain_policy,
8995 },
8996 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8997 .call = nf_tables_getchain,
8998 .type = NFNL_CB_RCU,
96518518
PM		 8999 .attr_count = NFTA_CHAIN_MAX,
9000 .policy = nft_chain_policy,
9001 },
9002 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 9003 .call = nf_tables_delchain,
9004 .type = NFNL_CB_BATCH,
96518518
PM		 9005 .attr_count = NFTA_CHAIN_MAX,
9006 .policy = nft_chain_policy,
9007 },
f80a612d
FFM		 9008 [NFT_MSG_DESTROYCHAIN] = {
9009 .call = nf_tables_delchain,
9010 .type = NFNL_CB_BATCH,
9011 .attr_count = NFTA_CHAIN_MAX,
9012 .policy = nft_chain_policy,
9013 },
96518518 9014 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 9015 .call = nf_tables_newrule,
9016 .type = NFNL_CB_BATCH,
96518518
PM		 9017 .attr_count = NFTA_RULE_MAX,
9018 .policy = nft_rule_policy,
9019 },
9020 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 9021 .call = nf_tables_getrule,
9022 .type = NFNL_CB_RCU,
96518518
PM		 9023 .attr_count = NFTA_RULE_MAX,
9024 .policy = nft_rule_policy,
9025 },
8daa8fde 9026 [NFT_MSG_GETRULE_RESET] = {
3cb03edb 9027 .call = nf_tables_getrule_reset,
8daa8fde
PS		 9028 .type = NFNL_CB_RCU,
9029 .attr_count = NFTA_RULE_MAX,
9030 .policy = nft_rule_policy,
9031 },
96518518 9032 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 9033 .call = nf_tables_delrule,
9034 .type = NFNL_CB_BATCH,
96518518
PM		 9035 .attr_count = NFTA_RULE_MAX,
9036 .policy = nft_rule_policy,
9037 },
f80a612d
FFM		 9038 [NFT_MSG_DESTROYRULE] = {
9039 .call = nf_tables_delrule,
9040 .type = NFNL_CB_BATCH,
9041 .attr_count = NFTA_RULE_MAX,
9042 .policy = nft_rule_policy,
9043 },
20a69341 9044 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 9045 .call = nf_tables_newset,
9046 .type = NFNL_CB_BATCH,
20a69341
PM		 9047 .attr_count = NFTA_SET_MAX,
9048 .policy = nft_set_policy,
9049 },
9050 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 9051 .call = nf_tables_getset,
9052 .type = NFNL_CB_RCU,
20a69341
PM		 9053 .attr_count = NFTA_SET_MAX,
9054 .policy = nft_set_policy,
9055 },
9056 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 9057 .call = nf_tables_delset,
9058 .type = NFNL_CB_BATCH,
20a69341
PM		 9059 .attr_count = NFTA_SET_MAX,
9060 .policy = nft_set_policy,
9061 },
f80a612d
FFM		 9062 [NFT_MSG_DESTROYSET] = {
9063 .call = nf_tables_delset,
9064 .type = NFNL_CB_BATCH,
9065 .attr_count = NFTA_SET_MAX,
9066 .policy = nft_set_policy,
9067 },
20a69341 9068 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 9069 .call = nf_tables_newsetelem,
9070 .type = NFNL_CB_BATCH,
20a69341
PM		 9071 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9072 .policy = nft_set_elem_list_policy,
9073 },
9074 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 9075 .call = nf_tables_getsetelem,
9076 .type = NFNL_CB_RCU,
20a69341
PM		 9077 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9078 .policy = nft_set_elem_list_policy,
9079 },
079cd633
PS		 9080 [NFT_MSG_GETSETELEM_RESET] = {
9081 .call = nf_tables_getsetelem,
9082 .type = NFNL_CB_RCU,
9083 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9084 .policy = nft_set_elem_list_policy,
9085 },
20a69341 9086 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 9087 .call = nf_tables_delsetelem,
9088 .type = NFNL_CB_BATCH,
20a69341
PM		 9089 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9090 .policy = nft_set_elem_list_policy,
9091 },
f80a612d
FFM		 9092 [NFT_MSG_DESTROYSETELEM] = {
9093 .call = nf_tables_delsetelem,
9094 .type = NFNL_CB_BATCH,
9095 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9096 .policy = nft_set_elem_list_policy,
9097 },
84d7fce6 9098 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 9099 .call = nf_tables_getgen,
9100 .type = NFNL_CB_RCU,
84d7fce6 9101 },
e5009240 9102 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 9103 .call = nf_tables_newobj,
9104 .type = NFNL_CB_BATCH,
e5009240
PNA		 9105 .attr_count = NFTA_OBJ_MAX,
9106 .policy = nft_obj_policy,
9107 },
9108 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 9109 .call = nf_tables_getobj,
9110 .type = NFNL_CB_RCU,
e5009240
PNA		 9111 .attr_count = NFTA_OBJ_MAX,
9112 .policy = nft_obj_policy,
9113 },
9114 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 9115 .call = nf_tables_delobj,
9116 .type = NFNL_CB_BATCH,
e5009240
PNA		 9117 .attr_count = NFTA_OBJ_MAX,
9118 .policy = nft_obj_policy,
9119 },
f80a612d
FFM		 9120 [NFT_MSG_DESTROYOBJ] = {
9121 .call = nf_tables_delobj,
9122 .type = NFNL_CB_BATCH,
9123 .attr_count = NFTA_OBJ_MAX,
9124 .policy = nft_obj_policy,
9125 },
43da04a5 9126 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 9127 .call = nf_tables_getobj,
9128 .type = NFNL_CB_RCU,
43da04a5
PNA		 9129 .attr_count = NFTA_OBJ_MAX,
9130 .policy = nft_obj_policy,
9131 },
3b49e2e9 9132 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 9133 .call = nf_tables_newflowtable,
9134 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 9135 .attr_count = NFTA_FLOWTABLE_MAX,
9136 .policy = nft_flowtable_policy,
9137 },
9138 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 9139 .call = nf_tables_getflowtable,
9140 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 9141 .attr_count = NFTA_FLOWTABLE_MAX,
9142 .policy = nft_flowtable_policy,
9143 },
9144 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 9145 .call = nf_tables_delflowtable,
9146 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 9147 .attr_count = NFTA_FLOWTABLE_MAX,
9148 .policy = nft_flowtable_policy,
9149 },
f80a612d
FFM		 9150 [NFT_MSG_DESTROYFLOWTABLE] = {
9151 .call = nf_tables_delflowtable,
9152 .type = NFNL_CB_BATCH,
9153 .attr_count = NFTA_FLOWTABLE_MAX,
9154 .policy = nft_flowtable_policy,
9155 },
96518518
PM		 9156};
9157
a654de8f
PNA		 9158static int nf_tables_validate(struct net *net)
9159{
d59d2f82 9160 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 9161 struct nft_table *table;
9162
00c320f9
FW		 9163 list_for_each_entry(table, &nft_net->tables, list) {
9164 switch (table->validate_state) {
9165 case NFT_VALIDATE_SKIP:
9166 continue;
9167 case NFT_VALIDATE_NEED:
9168 nft_validate_state_update(table, NFT_VALIDATE_DO);
9169 fallthrough;
9170 case NFT_VALIDATE_DO:
a654de8f
PNA		 9171 if (nft_table_validate(net, table) < 0)
9172 return -EAGAIN;
00c320f9
FW		 9173
9174 nft_validate_state_update(table, NFT_VALIDATE_SKIP);
4b80ced9 9175 break;
a654de8f 9176 }
a654de8f
PNA		 9177 }
9178
9179 return 0;
9180}
9181
66293c46
FW		 9182/* a drop policy has to be deferred until all rules have been activated,
9183 * otherwise a large ruleset that contains a drop-policy base chain will
9184 * cause all packets to get dropped until the full transaction has been
9185 * processed.
9186 *
9187 * We defer the drop policy until the transaction has been finalized.
9188 */
9189static void nft_chain_commit_drop_policy(struct nft_trans *trans)
9190{
9191 struct nft_base_chain *basechain;
9192
9193 if (nft_trans_chain_policy(trans) != NF_DROP)
9194 return;
9195
9196 if (!nft_is_base_chain(trans->ctx.chain))
9197 return;
9198
9199 basechain = nft_base_chain(trans->ctx.chain);
9200 basechain->policy = NF_DROP;
9201}
9202
91c7b38d
PNA		 9203static void nft_chain_commit_update(struct nft_trans *trans)
9204{
9205 struct nft_base_chain *basechain;
9206
1b2470e5
FW		 9207 if (nft_trans_chain_name(trans)) {
9208 rhltable_remove(&trans->ctx.table->chains_ht,
9209 &trans->ctx.chain->rhlhead,
9210 nft_chain_ht_params);
d71efb59 9211 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 9212 rhltable_insert_key(&trans->ctx.table->chains_ht,
9213 trans->ctx.chain->name,
9214 &trans->ctx.chain->rhlhead,
9215 nft_chain_ht_params);
9216 }
91c7b38d 9217
f323d954 9218 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 9219 return;
9220
53315ac6
FW		 9221 nft_chain_stats_replace(trans);
9222
91c7b38d 9223 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 9224
9225 switch (nft_trans_chain_policy(trans)) {
9226 case NF_DROP:
9227 case NF_ACCEPT:
9228 basechain->policy = nft_trans_chain_policy(trans);
9229 break;
9230 }
9231}
9232
d62d0ba9
FFM		 9233static void nft_obj_commit_update(struct nft_trans *trans)
9234{
9235 struct nft_object *newobj;
9236 struct nft_object *obj;
9237
9238 obj = nft_trans_obj(trans);
9239 newobj = nft_trans_obj_newobj(trans);
9240
9fedd894
FFM		 9241 if (obj->ops->update)
9242 obj->ops->update(obj, newobj);
d62d0ba9 9243
dad3bdee 9244 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 9245}
9246
2f99aa31 9247static void nft_commit_release(struct nft_trans *trans)
c7c32e72 9248{
c7c32e72
PNA		 9249 switch (trans->msg_type) {
9250 case NFT_MSG_DELTABLE:
f80a612d 9251 case NFT_MSG_DESTROYTABLE:
c7c32e72
PNA		 9252 nf_tables_table_destroy(&trans->ctx);
9253 break;
9f8aac0b 9254 case NFT_MSG_NEWCHAIN:
53315ac6 9255 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 9256 kfree(nft_trans_chain_name(trans));
9257 break;
c7c32e72 9258 case NFT_MSG_DELCHAIN:
f80a612d 9259 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9260 if (nft_trans_chain_update(trans))
9261 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9262 else
9263 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9264 break;
9265 case NFT_MSG_DELRULE:
f80a612d 9266 case NFT_MSG_DESTROYRULE:
c7c32e72
PNA		 9267 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9268 break;
9269 case NFT_MSG_DELSET:
f80a612d 9270 case NFT_MSG_DESTROYSET:
0c2a85ed 9271 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9272 break;
61edafbb 9273 case NFT_MSG_DELSETELEM:
f80a612d 9274 case NFT_MSG_DESTROYSETELEM:
3453c927
PNA		 9275 nf_tables_set_elem_destroy(&trans->ctx,
9276 nft_trans_elem_set(trans),
0e1ea651 9277 nft_trans_elem_priv(trans));
61edafbb 9278 break;
e5009240 9279 case NFT_MSG_DELOBJ:
f80a612d 9280 case NFT_MSG_DESTROYOBJ:
00bfb320 9281 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9282 break;
3b49e2e9 9283 case NFT_MSG_DELFLOWTABLE:
f80a612d 9284 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9285 if (nft_trans_flowtable_update(trans))
cdc32546 9286 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
abadb2f8
PNA		 9287 else
9288 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9289 break;
c7c32e72 9290 }
0935d558
FW		 9291
9292 if (trans->put_net)
9293 put_net(trans->ctx.net);
9294
c7c32e72
PNA		 9295 kfree(trans);
9296}
9297
0935d558 9298static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 9299{
9300 struct nft_trans *trans, *next;
0935d558
FW		 9301 LIST_HEAD(head);
9302
9303 spin_lock(&nf_tables_destroy_list_lock);
9304 list_splice_init(&nf_tables_destroy_list, &head);
9305 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 9306
0935d558 9307 if (list_empty(&head))
2f99aa31
FW		 9308 return;
9309
9310 synchronize_rcu();
9311
0935d558 9312 list_for_each_entry_safe(trans, next, &head, list) {
938154b9 9313 nft_trans_list_del(trans);
2f99aa31
FW		 9314 nft_commit_release(trans);
9315 }
9316}
9317
ffe8923f
FW		 9318void nf_tables_trans_destroy_flush_work(void)
9319{
9320 flush_work(&trans_destroy_work);
9321}
9322EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
9323
ed5f85d4
PNA		 9324static bool nft_expr_reduce(struct nft_regs_track *track,
9325 const struct nft_expr *expr)
9326{
9e539c5b 9327 return false;
ed5f85d4
PNA		 9328}
9329
0cbc06b3
FW		 9330static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
9331{
2c865a8a 9332 const struct nft_expr *expr, *last;
12e4ecfa 9333 struct nft_regs_track track = {};
2c865a8a
PNA		 9334 unsigned int size, data_size;
9335 void *data, *data_boundary;
9336 struct nft_rule_dp *prule;
0cbc06b3 9337 struct nft_rule *rule;
0cbc06b3
FW		 9338
9339 /* already handled or inactive chain? */
2c865a8a 9340 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 9341 return 0;
9342
63045bfd 9343 data_size = 0;
10377d42 9344 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 9345 if (nft_is_active_next(net, rule)) {
9346 data_size += sizeof(*prule) + rule->dlen;
9347 if (data_size > INT_MAX)
9348 return -ENOMEM;
9349 }
0cbc06b3
FW		 9350 }
9351
e38fbfa9 9352 chain->blob_next = nf_tables_chain_alloc_rules(chain, data_size);
2c865a8a 9353 if (!chain->blob_next)
0cbc06b3
FW		 9354 return -ENOMEM;
9355
2c865a8a
PNA		 9356 data = (void *)chain->blob_next->data;
9357 data_boundary = data + data_size;
9358 size = 0;
9359
10377d42 9360 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 9361 if (!nft_is_active_next(net, rule))
9362 continue;
9363
9364 prule = (struct nft_rule_dp *)data;
9365 data += offsetof(struct nft_rule_dp, data);
9366 if (WARN_ON_ONCE(data > data_boundary))
9367 return -ENOMEM;
9368
12e4ecfa 9369 size = 0;
fe75e84a 9370 track.last = nft_expr_last(rule);
2c865a8a 9371 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 9372 track.cur = expr;
9373
ed5f85d4 9374 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 9375 expr = track.cur;
9376 continue;
9377 }
9378
08e42a0d 9379 if (WARN_ON_ONCE(data + size + expr->ops->size > data_boundary))
2c865a8a
PNA		 9380 return -ENOMEM;
9381
9382 memcpy(data + size, expr, expr->ops->size);
9383 size += expr->ops->size;
9384 }
9385 if (WARN_ON_ONCE(size >= 1 << 12))
9386 return -ENOMEM;
9387
9388 prule->handle = rule->handle;
9389 prule->dlen = size;
9390 prule->is_last = 0;
9391
9392 data += size;
9393 size = 0;
9394 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 9395 }
9396
2c865a8a
PNA		 9397 if (WARN_ON_ONCE(data > data_boundary))
9398 return -ENOMEM;
9399
e38fbfa9
FW		 9400 prule = (struct nft_rule_dp *)data;
9401 nft_last_rule(chain, prule);
2c865a8a 9402
0cbc06b3
FW		 9403 return 0;
9404}
9405
9406static void nf_tables_commit_chain_prepare_cancel(struct net *net)
9407{
d59d2f82 9408 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 9409 struct nft_trans *trans, *next;
9410
0854db2a 9411 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 9412 struct nft_chain *chain = trans->ctx.chain;
9413
9414 if (trans->msg_type == NFT_MSG_NEWRULE ||
9415 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 9416 kvfree(chain->blob_next);
9417 chain->blob_next = NULL;
0cbc06b3
FW		 9418 }
9419 }
9420}
9421
e38fbfa9 9422static void __nf_tables_commit_chain_free_rules(struct rcu_head *h)
0cbc06b3 9423{
e38fbfa9 9424 struct nft_rule_dp_last *l = container_of(h, struct nft_rule_dp_last, h);
0cbc06b3 9425
e38fbfa9 9426 kvfree(l->blob);
0cbc06b3
FW		 9427}
9428
2c865a8a 9429static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 9430{
e38fbfa9 9431 struct nft_rule_dp_last *last;
0cbc06b3 9432
e38fbfa9
FW		 9433 /* last rule trailer is after end marker */
9434 last = (void *)blob + sizeof(*blob) + blob->size;
9435 last->blob = blob;
0cbc06b3 9436
e38fbfa9 9437 call_rcu(&last->h, __nf_tables_commit_chain_free_rules);
0cbc06b3
FW		 9438}
9439
0fb39bbe 9440static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 9441{
2c865a8a 9442 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 9443 bool next_genbit;
9444
9445 next_genbit = nft_gencursor_next(net);
9446
2c865a8a 9447 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 9448 lockdep_commit_lock_is_held(net));
2c865a8a 9449 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 9450 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 9451
9452 /* No changes to this chain? */
2c865a8a 9453 if (chain->blob_next == NULL) {
0cbc06b3
FW		 9454 /* chain had no change in last or next generation */
9455 if (g0 == g1)
9456 return;
9457 /*
9458 * chain had no change in this generation; make sure next
9459 * one uses same rules as current generation.
9460 */
9461 if (next_genbit) {
2c865a8a 9462 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 9463 nf_tables_commit_chain_free_rules_old(g1);
9464 } else {
2c865a8a 9465 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 9466 nf_tables_commit_chain_free_rules_old(g0);
9467 }
9468
9469 return;
9470 }
9471
9472 if (next_genbit)
2c865a8a 9473 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 9474 else
2c865a8a 9475 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 9476
2c865a8a 9477 chain->blob_next = NULL;
0cbc06b3
FW		 9478
9479 if (g0 == g1)
9480 return;
9481
9482 if (next_genbit)
9483 nf_tables_commit_chain_free_rules_old(g1);
9484 else
9485 nf_tables_commit_chain_free_rules_old(g0);
9486}
9487
d152159b
FW		 9488static void nft_obj_del(struct nft_object *obj)
9489{
4d44175a 9490 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 9491 list_del_rcu(&obj->list);
9492}
9493
d0e2c7de 9494void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 9495{
9496 struct nft_table *table = chain->table;
9497
9498 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
9499 nft_chain_ht_params));
9500 list_del_rcu(&chain->list);
9501}
9502
5f68718b
PNA		 9503static void nft_trans_gc_setelem_remove(struct nft_ctx *ctx,
9504 struct nft_trans_gc *trans)
9505{
0e1ea651 9506 struct nft_elem_priv **priv = trans->priv;
5f68718b
PNA		 9507 unsigned int i;
9508
9509 for (i = 0; i < trans->count; i++) {
0e1ea651
PNA		 9510 nft_setelem_data_deactivate(ctx->net, trans->set, priv[i]);
9511 nft_setelem_remove(ctx->net, trans->set, priv[i]);
5f68718b
PNA		 9512 }
9513}
9514
9515void nft_trans_gc_destroy(struct nft_trans_gc *trans)
9516{
9517 nft_set_put(trans->set);
9518 put_net(trans->net);
9519 kfree(trans);
9520}
9521
9522static void nft_trans_gc_trans_free(struct rcu_head *rcu)
9523{
0e1ea651 9524 struct nft_elem_priv *elem_priv;
5f68718b
PNA		 9525 struct nft_trans_gc *trans;
9526 struct nft_ctx ctx = {};
9527 unsigned int i;
9528
9529 trans = container_of(rcu, struct nft_trans_gc, rcu);
9530 ctx.net = read_pnet(&trans->set->net);
9531
9532 for (i = 0; i < trans->count; i++) {
0e1ea651
PNA		 9533 elem_priv = trans->priv[i];
9534 if (!nft_setelem_is_catchall(trans->set, elem_priv))
5f68718b
PNA		 9535 atomic_dec(&trans->set->nelems);
9536
0e1ea651 9537 nf_tables_set_elem_destroy(&ctx, trans->set, elem_priv);
5f68718b
PNA		 9538 }
9539
9540 nft_trans_gc_destroy(trans);
9541}
9542
9543static bool nft_trans_gc_work_done(struct nft_trans_gc *trans)
9544{
9545 struct nftables_pernet *nft_net;
9546 struct nft_ctx ctx = {};
9547
9548 nft_net = nft_pernet(trans->net);
9549
9550 mutex_lock(&nft_net->commit_mutex);
9551
9552 /* Check for race with transaction, otherwise this batch refers to
9553 * stale objects that might not be there anymore. Skip transaction if
9554 * set has been destroyed from control plane transaction in case gc
9555 * worker loses race.
9556 */
9557 if (READ_ONCE(nft_net->gc_seq) != trans->seq || trans->set->dead) {
9558 mutex_unlock(&nft_net->commit_mutex);
9559 return false;
9560 }
9561
9562 ctx.net = trans->net;
9563 ctx.table = trans->set->table;
9564
9565 nft_trans_gc_setelem_remove(&ctx, trans);
9566 mutex_unlock(&nft_net->commit_mutex);
9567
9568 return true;
9569}
9570
9571static void nft_trans_gc_work(struct work_struct *work)
9572{
9573 struct nft_trans_gc *trans, *next;
9574 LIST_HEAD(trans_gc_list);
9575
8357bc94 9576 spin_lock(&nf_tables_gc_list_lock);
5f68718b 9577 list_splice_init(&nf_tables_gc_list, &trans_gc_list);
8357bc94 9578 spin_unlock(&nf_tables_gc_list_lock);
5f68718b
PNA		 9579
9580 list_for_each_entry_safe(trans, next, &trans_gc_list, list) {
9581 list_del(&trans->list);
9582 if (!nft_trans_gc_work_done(trans)) {
9583 nft_trans_gc_destroy(trans);
9584 continue;
9585 }
9586 call_rcu(&trans->rcu, nft_trans_gc_trans_free);
9587 }
9588}
9589
9590struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set,
9591 unsigned int gc_seq, gfp_t gfp)
9592{
9593 struct net *net = read_pnet(&set->net);
9594 struct nft_trans_gc *trans;
9595
9596 trans = kzalloc(sizeof(*trans), gfp);
9597 if (!trans)
9598 return NULL;
9599
02c6c244
PNA		 9600 trans->net = maybe_get_net(net);
9601 if (!trans->net) {
9602 kfree(trans);
9603 return NULL;
9604 }
9605
5f68718b
PNA		 9606 refcount_inc(&set->refs);
9607 trans->set = set;
5f68718b
PNA		 9608 trans->seq = gc_seq;
9609
9610 return trans;
9611}
9612
9613void nft_trans_gc_elem_add(struct nft_trans_gc *trans, void *priv)
9614{
9615 trans->priv[trans->count++] = priv;
9616}
9617
9618static void nft_trans_gc_queue_work(struct nft_trans_gc *trans)
9619{
9620 spin_lock(&nf_tables_gc_list_lock);
9621 list_add_tail(&trans->list, &nf_tables_gc_list);
9622 spin_unlock(&nf_tables_gc_list_lock);
9623
9624 schedule_work(&trans_gc_work);
9625}
9626
9627static int nft_trans_gc_space(struct nft_trans_gc *trans)
9628{
9629 return NFT_TRANS_GC_BATCHCOUNT - trans->count;
9630}
9631
9632struct nft_trans_gc *nft_trans_gc_queue_async(struct nft_trans_gc *gc,
9633 unsigned int gc_seq, gfp_t gfp)
9634{
cf5000a7
FW		 9635 struct nft_set *set;
9636
5f68718b
PNA		 9637 if (nft_trans_gc_space(gc))
9638 return gc;
9639
cf5000a7 9640 set = gc->set;
5f68718b
PNA		 9641 nft_trans_gc_queue_work(gc);
9642
cf5000a7 9643 return nft_trans_gc_alloc(set, gc_seq, gfp);
5f68718b
PNA		 9644}
9645
9646void nft_trans_gc_queue_async_done(struct nft_trans_gc *trans)
9647{
9648 if (trans->count == 0) {
9649 nft_trans_gc_destroy(trans);
9650 return;
9651 }
9652
9653 nft_trans_gc_queue_work(trans);
9654}
9655
9656struct nft_trans_gc *nft_trans_gc_queue_sync(struct nft_trans_gc *gc, gfp_t gfp)
9657{
cf5000a7
FW		 9658 struct nft_set *set;
9659
5f68718b
PNA		 9660 if (WARN_ON_ONCE(!lockdep_commit_lock_is_held(gc->net)))
9661 return NULL;
9662
9663 if (nft_trans_gc_space(gc))
9664 return gc;
9665
cf5000a7 9666 set = gc->set;
5f68718b
PNA		 9667 call_rcu(&gc->rcu, nft_trans_gc_trans_free);
9668
cf5000a7 9669 return nft_trans_gc_alloc(set, 0, gfp);
5f68718b
PNA		 9670}
9671
9672void nft_trans_gc_queue_sync_done(struct nft_trans_gc *trans)
9673{
9674 WARN_ON_ONCE(!lockdep_commit_lock_is_held(trans->net));
9675
9676 if (trans->count == 0) {
9677 nft_trans_gc_destroy(trans);
9678 return;
9679 }
9680
9681 call_rcu(&trans->rcu, nft_trans_gc_trans_free);
9682}
9683
8837ba3e
PNA		 9684struct nft_trans_gc *nft_trans_gc_catchall_async(struct nft_trans_gc *gc,
9685 unsigned int gc_seq)
5f68718b 9686{
8837ba3e 9687 struct nft_set_elem_catchall *catchall;
5f68718b
PNA		 9688 const struct nft_set *set = gc->set;
9689 struct nft_set_ext *ext;
9690
8837ba3e 9691 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5f68718b
PNA		 9692 ext = nft_set_elem_ext(set, catchall->elem);
9693
9694 if (!nft_set_elem_expired(ext))
9695 continue;
9696 if (nft_set_elem_is_dead(ext))
9697 goto dead_elem;
9698
9699 nft_set_elem_dead(ext);
9700dead_elem:
8837ba3e 9701 gc = nft_trans_gc_queue_async(gc, gc_seq, GFP_ATOMIC);
5f68718b
PNA		 9702 if (!gc)
9703 return NULL;
9704
8837ba3e 9705 nft_trans_gc_elem_add(gc, catchall->elem);
5f68718b
PNA		 9706 }
9707
9708 return gc;
9709}
9710
4a9e12ea
PNA		 9711struct nft_trans_gc *nft_trans_gc_catchall_sync(struct nft_trans_gc *gc)
9712{
8837ba3e
PNA		 9713 struct nft_set_elem_catchall *catchall, *next;
9714 const struct nft_set *set = gc->set;
9715 struct nft_elem_priv *elem_priv;
9716 struct nft_set_ext *ext;
9717
9718 WARN_ON_ONCE(!lockdep_commit_lock_is_held(gc->net));
9719
9720 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
9721 ext = nft_set_elem_ext(set, catchall->elem);
9722
9723 if (!nft_set_elem_expired(ext))
9724 continue;
9725
9726 gc = nft_trans_gc_queue_sync(gc, GFP_KERNEL);
9727 if (!gc)
9728 return NULL;
9729
9730 elem_priv = catchall->elem;
9731 nft_setelem_data_deactivate(gc->net, gc->set, elem_priv);
9732 nft_setelem_catchall_destroy(catchall);
9733 nft_trans_gc_elem_add(gc, elem_priv);
9734 }
9735
9736 return gc;
4a9e12ea
PNA		 9737}
9738
eb014de4
PNA		 9739static void nf_tables_module_autoload_cleanup(struct net *net)
9740{
d59d2f82 9741 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9742 struct nft_module_request *req, *next;
9743
0854db2a
FW		 9744 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
9745 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 9746 WARN_ON_ONCE(!req->done);
9747 list_del(&req->list);
9748 kfree(req);
9749 }
9750}
9751
0935d558
FW		 9752static void nf_tables_commit_release(struct net *net)
9753{
d59d2f82 9754 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 9755 struct nft_trans *trans;
9756
9757 /* all side effects have to be made visible.
9758 * For example, if a chain named 'foo' has been deleted, a
9759 * new transaction must not find it anymore.
9760 *
9761 * Memory reclaim happens asynchronously from work queue
9762 * to prevent expensive synchronize_rcu() in commit phase.
9763 */
0854db2a 9764 if (list_empty(&nft_net->commit_list)) {
eb014de4 9765 nf_tables_module_autoload_cleanup(net);
0854db2a 9766 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9767 return;
9768 }
9769
0854db2a 9770 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 9771 struct nft_trans, list);
9772 get_net(trans->ctx.net);
9773 WARN_ON_ONCE(trans->put_net);
9774
9775 trans->put_net = true;
9776 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 9777 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 9778 spin_unlock(&nf_tables_destroy_list_lock);
9779
eb014de4 9780 nf_tables_module_autoload_cleanup(net);
0935d558 9781 schedule_work(&trans_destroy_work);
ffe8923f 9782
0854db2a 9783 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9784}
9785
67cc570e
PNA		 9786static void nft_commit_notify(struct net *net, u32 portid)
9787{
d59d2f82 9788 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 9789 struct sk_buff *batch_skb = NULL, *nskb, *skb;
9790 unsigned char *data;
9791 int len;
9792
0854db2a 9793 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 9794 if (!batch_skb) {
9795new_batch:
9796 batch_skb = skb;
9797 len = NLMSG_GOODSIZE - skb->len;
9798 list_del(&skb->list);
9799 continue;
9800 }
9801 len -= skb->len;
9802 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
9803 data = skb_put(batch_skb, skb->len);
9804 memcpy(data, skb->data, skb->len);
9805 list_del(&skb->list);
9806 kfree_skb(skb);
9807 continue;
9808 }
9809 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9810 NFT_CB(batch_skb).report, GFP_KERNEL);
9811 goto new_batch;
9812 }
9813
9814 if (batch_skb) {
9815 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9816 NFT_CB(batch_skb).report, GFP_KERNEL);
9817 }
9818
0854db2a 9819 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 9820}
9821
c520292f
RGB		 9822static int nf_tables_commit_audit_alloc(struct list_head *adl,
9823 struct nft_table *table)
9824{
9825 struct nft_audit_data *adp;
9826
9827 list_for_each_entry(adp, adl, list) {
9828 if (adp->table == table)
9829 return 0;
9830 }
9831 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
9832 if (!adp)
9833 return -ENOMEM;
9834 adp->table = table;
9835 list_add(&adp->list, adl);
9836 return 0;
9837}
9838
cfbe3650
DM		 9839static void nf_tables_commit_audit_free(struct list_head *adl)
9840{
9841 struct nft_audit_data *adp, *adn;
9842
9843 list_for_each_entry_safe(adp, adn, adl, list) {
9844 list_del(&adp->list);
9845 kfree(adp);
9846 }
9847}
9848
c520292f
RGB		 9849static void nf_tables_commit_audit_collect(struct list_head *adl,
9850 struct nft_table *table, u32 op)
9851{
9852 struct nft_audit_data *adp;
9853
9854 list_for_each_entry(adp, adl, list) {
9855 if (adp->table == table)
9856 goto found;
9857 }
dadf33c9 9858 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 9859 return;
9860found:
9861 adp->entries++;
9862 if (!adp->op || adp->op > op)
9863 adp->op = op;
9864}
9865
9866#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
9867
9868static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
9869{
9870 struct nft_audit_data *adp, *adn;
9871 char aubuf[AUNFTABLENAMELEN];
9872
9873 list_for_each_entry_safe(adp, adn, adl, list) {
9874 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
9875 generation);
9876 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
9877 nft2audit_op[adp->op], GFP_KERNEL);
9878 list_del(&adp->list);
9879 kfree(adp);
9880 }
9881}
9882
212ed75d
PNA		 9883static void nft_set_commit_update(struct list_head *set_update_list)
9884{
9885 struct nft_set *set, *next;
9886
9887 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
9888 list_del_init(&set->pending_update);
9889
9890 if (!set->ops->commit)
9891 continue;
9892
9893 set->ops->commit(set);
9894 }
9895}
9896
6a33d8b7
PNA		 9897static unsigned int nft_gc_seq_begin(struct nftables_pernet *nft_net)
9898{
9899 unsigned int gc_seq;
9900
9901 /* Bump gc counter, it becomes odd, this is the busy mark. */
9902 gc_seq = READ_ONCE(nft_net->gc_seq);
9903 WRITE_ONCE(nft_net->gc_seq, ++gc_seq);
9904
9905 return gc_seq;
9906}
9907
9908static void nft_gc_seq_end(struct nftables_pernet *nft_net, unsigned int gc_seq)
9909{
9910 WRITE_ONCE(nft_net->gc_seq, ++gc_seq);
9911}
9912
5913beaf 9913static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 9914{
d59d2f82 9915 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9916 struct nft_trans *trans, *next;
5f68718b 9917 unsigned int base_seq, gc_seq;
212ed75d 9918 LIST_HEAD(set_update_list);
a3716e70 9919 struct nft_trans_elem *te;
0cbc06b3
FW		 9920 struct nft_chain *chain;
9921 struct nft_table *table;
c520292f 9922 LIST_HEAD(adl);
c9626a2c 9923 int err;
37082f93 9924
0854db2a
FW		 9925 if (list_empty(&nft_net->commit_list)) {
9926 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 9927 return 0;
9928 }
9929
938154b9
PNA		 9930 list_for_each_entry(trans, &nft_net->binding_list, binding_list) {
9931 switch (trans->msg_type) {
9932 case NFT_MSG_NEWSET:
9933 if (!nft_trans_set_update(trans) &&
9934 nft_set_is_anonymous(nft_trans_set(trans)) &&
9935 !nft_trans_set_bound(trans)) {
9936 pr_warn_once("nftables ruleset with unbound set\n");
9937 return -EINVAL;
9938 }
9939 break;
62e1e94b
PNA		 9940 case NFT_MSG_NEWCHAIN:
9941 if (!nft_trans_chain_update(trans) &&
9942 nft_chain_binding(nft_trans_chain(trans)) &&
9943 !nft_trans_chain_bound(trans)) {
9944 pr_warn_once("nftables ruleset with unbound chain\n");
9945 return -EINVAL;
9946 }
9947 break;
938154b9
PNA		 9948 }
9949 }
9950
a654de8f 9951 /* 0. Validate ruleset, otherwise roll back for error reporting. */
4b80ced9
FW		 9952 if (nf_tables_validate(net) < 0) {
9953 nft_net->validate_state = NFT_VALIDATE_DO;
a654de8f 9954 return -EAGAIN;
4b80ced9 9955 }
a654de8f 9956
c9626a2c
PNA		 9957 err = nft_flow_rule_offload_commit(net);
9958 if (err < 0)
9959 return err;
9960
0cbc06b3 9961 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 9962 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 9963 int ret;
37082f93 9964
c520292f
RGB		 9965 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
9966 if (ret) {
9967 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9968 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 9969 return ret;
9970 }
0cbc06b3
FW		 9971 if (trans->msg_type == NFT_MSG_NEWRULE ||
9972 trans->msg_type == NFT_MSG_DELRULE) {
9973 chain = trans->ctx.chain;
9974
9975 ret = nf_tables_commit_chain_prepare(net, chain);
9976 if (ret < 0) {
9977 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9978 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 9979 return ret;
9980 }
9981 }
9982 }
37082f93 9983
0cbc06b3 9984 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 9985 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 9986 list_for_each_entry(chain, &table->chains, list)
9987 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 9988 }
9989
9990 /*
9991 * Bump generation counter, invalidate any dump in progress.
9992 * Cannot fail after this point.
37082f93 9993 */
34002783
PNA		 9994 base_seq = READ_ONCE(nft_net->base_seq);
9995 while (++base_seq == 0)
0854db2a 9996 ;
0cbc06b3 9997
34002783
PNA		 9998 WRITE_ONCE(nft_net->base_seq, base_seq);
9999
6a33d8b7 10000 gc_seq = nft_gc_seq_begin(nft_net);
5f68718b 10001
0cbc06b3
FW		 10002 /* step 3. Start new generation, rules_gen_X now in use. */
10003 net->nft.gencursor = nft_gencursor_next(net);
37082f93 10004
0854db2a 10005 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 10006 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
10007 trans->msg_type);
b380e5c7 10008 switch (trans->msg_type) {
55dd6f93
PNA		 10009 case NFT_MSG_NEWTABLE:
10010 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 10011 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
10012 nft_trans_destroy(trans);
10013 break;
10014 }
10015 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 10016 nf_tables_table_disable(net, trans->ctx.table);
10017
179d9ba5 10018 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 10019 } else {
f2a6d766 10020 nft_clear(net, trans->ctx.table);
55dd6f93 10021 }
35151d84 10022 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 10023 nft_trans_destroy(trans);
10024 break;
10025 case NFT_MSG_DELTABLE:
f80a612d 10026 case NFT_MSG_DESTROYTABLE:
f2a6d766 10027 list_del_rcu(&trans->ctx.table->list);
f80a612d 10028 nf_tables_table_notify(&trans->ctx, trans->msg_type);
55dd6f93 10029 break;
91c7b38d 10030 case NFT_MSG_NEWCHAIN:
9f8aac0b 10031 if (nft_trans_chain_update(trans)) {
91c7b38d 10032 nft_chain_commit_update(trans);
b9703ed4
PNA		 10033 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN,
10034 &nft_trans_chain_hooks(trans));
10035 list_splice(&nft_trans_chain_hooks(trans),
10036 &nft_trans_basechain(trans)->hook_list);
9f8aac0b
FW		 10037 /* trans destroyed after rcu grace period */
10038 } else {
66293c46 10039 nft_chain_commit_drop_policy(trans);
664b0f8c 10040 nft_clear(net, trans->ctx.chain);
b9703ed4 10041 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
9f8aac0b
FW		 10042 nft_trans_destroy(trans);
10043 }
91c7b38d
PNA		 10044 break;
10045 case NFT_MSG_DELCHAIN:
f80a612d 10046 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 10047 if (nft_trans_chain_update(trans)) {
10048 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
10049 &nft_trans_chain_hooks(trans));
10050 nft_netdev_unregister_hooks(net,
10051 &nft_trans_chain_hooks(trans),
10052 true);
10053 } else {
10054 nft_chain_del(trans->ctx.chain);
10055 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
10056 NULL);
10057 nf_tables_unregister_hook(trans->ctx.net,
10058 trans->ctx.table,
10059 trans->ctx.chain);
10060 }
91c7b38d 10061 break;
b380e5c7 10062 case NFT_MSG_NEWRULE:
889f7ee7 10063 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 10064 nf_tables_rule_notify(&trans->ctx,
37082f93 10065 nft_trans_rule(trans),
35151d84 10066 NFT_MSG_NEWRULE);
9dd732e0
PNA		 10067 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10068 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10069
37082f93 10070 nft_trans_destroy(trans);
b380e5c7
PNA		 10071 break;
10072 case NFT_MSG_DELRULE:
f80a612d 10073 case NFT_MSG_DESTROYRULE:
b380e5c7 10074 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 10075 nf_tables_rule_notify(&trans->ctx,
10076 nft_trans_rule(trans),
f80a612d 10077 trans->msg_type);
f6ac8585
PNA		 10078 nft_rule_expr_deactivate(&trans->ctx,
10079 nft_trans_rule(trans),
10080 NFT_TRANS_COMMIT);
26b5934f
PNA		 10081
10082 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10083 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7 10084 break;
958bee14 10085 case NFT_MSG_NEWSET:
123b9961
PNA		 10086 if (nft_trans_set_update(trans)) {
10087 struct nft_set *set = nft_trans_set(trans);
4fefee57 10088
123b9961
PNA		 10089 WRITE_ONCE(set->timeout, nft_trans_set_timeout(trans));
10090 WRITE_ONCE(set->gc_int, nft_trans_set_gc_int(trans));
96b2ef9b
FW		 10091
10092 if (nft_trans_set_size(trans))
10093 WRITE_ONCE(set->size, nft_trans_set_size(trans));
123b9961
PNA		 10094 } else {
10095 nft_clear(net, nft_trans_set(trans));
10096 /* This avoids hitting -EBUSY when deleting the table
10097 * from the transaction.
10098 */
10099 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
10100 !list_empty(&nft_trans_set(trans)->bindings))
1689f259 10101 nft_use_dec(&trans->ctx.table->use);
123b9961 10102 }
958bee14 10103 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 10104 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 10105 nft_trans_destroy(trans);
10106 break;
10107 case NFT_MSG_DELSET:
f80a612d 10108 case NFT_MSG_DESTROYSET:
5f68718b 10109 nft_trans_set(trans)->dead = 1;
37a9cc52 10110 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 10111 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
f80a612d 10112 trans->msg_type, GFP_KERNEL);
958bee14 10113 break;
60319eb1 10114 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 10115 te = (struct nft_trans_elem *)trans->data;
10116
0e1ea651 10117 nft_setelem_activate(net, te->set, te->elem_priv);
cc02e457 10118 nf_tables_setelem_notify(&trans->ctx, te->set,
0e1ea651 10119 te->elem_priv,
6fb721cf 10120 NFT_MSG_NEWSETELEM);
212ed75d
PNA		 10121 if (te->set->ops->commit &&
10122 list_empty(&te->set->pending_update)) {
10123 list_add_tail(&te->set->pending_update,
10124 &set_update_list);
10125 }
60319eb1
PNA		 10126 nft_trans_destroy(trans);
10127 break;
10128 case NFT_MSG_DELSETELEM:
f80a612d 10129 case NFT_MSG_DESTROYSETELEM:
a3716e70 10130 te = (struct nft_trans_elem *)trans->data;
fe2811eb 10131
a3716e70 10132 nf_tables_setelem_notify(&trans->ctx, te->set,
0e1ea651 10133 te->elem_priv,
f80a612d 10134 trans->msg_type);
0e1ea651
PNA		 10135 nft_setelem_remove(net, te->set, te->elem_priv);
10136 if (!nft_setelem_is_catchall(te->set, te->elem_priv)) {
aaa31047
PNA		 10137 atomic_dec(&te->set->nelems);
10138 te->set->ndeact--;
10139 }
212ed75d
PNA		 10140 if (te->set->ops->commit &&
10141 list_empty(&te->set->pending_update)) {
10142 list_add_tail(&te->set->pending_update,
10143 &set_update_list);
10144 }
60319eb1 10145 break;
e5009240 10146 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 10147 if (nft_trans_obj_update(trans)) {
10148 nft_obj_commit_update(trans);
10149 nf_tables_obj_notify(&trans->ctx,
10150 nft_trans_obj(trans),
10151 NFT_MSG_NEWOBJ);
10152 } else {
10153 nft_clear(net, nft_trans_obj(trans));
10154 nf_tables_obj_notify(&trans->ctx,
10155 nft_trans_obj(trans),
10156 NFT_MSG_NEWOBJ);
10157 nft_trans_destroy(trans);
10158 }
e5009240
PNA		 10159 break;
10160 case NFT_MSG_DELOBJ:
f80a612d 10161 case NFT_MSG_DESTROYOBJ:
d152159b 10162 nft_obj_del(nft_trans_obj(trans));
e5009240 10163 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
f80a612d 10164 trans->msg_type);
e5009240 10165 break;
3b49e2e9 10166 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 10167 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 10168 nft_trans_flowtable(trans)->data.flags =
10169 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 10170 nf_tables_flowtable_notify(&trans->ctx,
10171 nft_trans_flowtable(trans),
10172 &nft_trans_flowtable_hooks(trans),
10173 NFT_MSG_NEWFLOWTABLE);
10174 list_splice(&nft_trans_flowtable_hooks(trans),
10175 &nft_trans_flowtable(trans)->hook_list);
10176 } else {
10177 nft_clear(net, nft_trans_flowtable(trans));
10178 nf_tables_flowtable_notify(&trans->ctx,
10179 nft_trans_flowtable(trans),
28339b21 10180 NULL,
78d9f48f
PNA		 10181 NFT_MSG_NEWFLOWTABLE);
10182 }
3b49e2e9
PNA		 10183 nft_trans_destroy(trans);
10184 break;
10185 case NFT_MSG_DELFLOWTABLE:
f80a612d 10186 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 10187 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 10188 nf_tables_flowtable_notify(&trans->ctx,
10189 nft_trans_flowtable(trans),
10190 &nft_trans_flowtable_hooks(trans),
f80a612d 10191 trans->msg_type);
abadb2f8
PNA		 10192 nft_unregister_flowtable_net_hooks(net,
10193 &nft_trans_flowtable_hooks(trans));
10194 } else {
10195 list_del_rcu(&nft_trans_flowtable(trans)->list);
10196 nf_tables_flowtable_notify(&trans->ctx,
10197 nft_trans_flowtable(trans),
28339b21 10198 NULL,
f80a612d 10199 trans->msg_type);
abadb2f8
PNA		 10200 nft_unregister_flowtable_net_hooks(net,
10201 &nft_trans_flowtable(trans)->hook_list);
10202 }
3b49e2e9 10203 break;
37082f93 10204 }
37082f93
PNA		 10205 }
10206
212ed75d
PNA		 10207 nft_set_commit_update(&set_update_list);
10208
67cc570e 10209 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 10210 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 10211 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
5f68718b 10212
6a33d8b7 10213 nft_gc_seq_end(nft_net, gc_seq);
4b80ced9 10214 nft_net->validate_state = NFT_VALIDATE_SKIP;
0935d558 10215 nf_tables_commit_release(net);
37082f93
PNA		 10216
10217 return 0;
10218}
10219
eb014de4
PNA		 10220static void nf_tables_module_autoload(struct net *net)
10221{
d59d2f82 10222 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 10223 struct nft_module_request *req, *next;
10224 LIST_HEAD(module_list);
10225
0854db2a
FW		 10226 list_splice_init(&nft_net->module_list, &module_list);
10227 mutex_unlock(&nft_net->commit_mutex);
eb014de4 10228 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 10229 request_module("%s", req->module);
10230 req->done = true;
eb014de4 10231 }
0854db2a
FW		 10232 mutex_lock(&nft_net->commit_mutex);
10233 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 10234}
10235
b326dd37 10236static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 10237{
c7c32e72
PNA		 10238 switch (trans->msg_type) {
10239 case NFT_MSG_NEWTABLE:
10240 nf_tables_table_destroy(&trans->ctx);
10241 break;
10242 case NFT_MSG_NEWCHAIN:
b9703ed4
PNA		 10243 if (nft_trans_chain_update(trans))
10244 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
10245 else
10246 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 10247 break;
10248 case NFT_MSG_NEWRULE:
10249 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
10250 break;
10251 case NFT_MSG_NEWSET:
0c2a85ed 10252 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 10253 break;
61edafbb
PM		 10254 case NFT_MSG_NEWSETELEM:
10255 nft_set_elem_destroy(nft_trans_elem_set(trans),
0e1ea651 10256 nft_trans_elem_priv(trans), true);
61edafbb 10257 break;
e5009240 10258 case NFT_MSG_NEWOBJ:
00bfb320 10259 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 10260 break;
3b49e2e9 10261 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 10262 if (nft_trans_flowtable_update(trans))
cdc32546 10263 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
78d9f48f
PNA		 10264 else
10265 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 10266 break;
c7c32e72
PNA		 10267 }
10268 kfree(trans);
10269}
10270
212ed75d
PNA		 10271static void nft_set_abort_update(struct list_head *set_update_list)
10272{
10273 struct nft_set *set, *next;
10274
10275 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
10276 list_del_init(&set->pending_update);
10277
10278 if (!set->ops->abort)
10279 continue;
10280
10281 set->ops->abort(set);
10282 }
10283}
10284
c0391b6a 10285static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 10286{
d59d2f82 10287 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 10288 struct nft_trans *trans, *next;
212ed75d 10289 LIST_HEAD(set_update_list);
02263db0 10290 struct nft_trans_elem *te;
37082f93 10291
c0391b6a
PNA		 10292 if (action == NFNL_ABORT_VALIDATE &&
10293 nf_tables_validate(net) < 0)
10294 return -EAGAIN;
10295
0854db2a 10296 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 10297 list) {
b380e5c7 10298 switch (trans->msg_type) {
55dd6f93
PNA		 10299 case NFT_MSG_NEWTABLE:
10300 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 10301 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
10302 nft_trans_destroy(trans);
10303 break;
10304 }
10305 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 10306 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 10307 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
10308 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
10309 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
10310 }
10311 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 10312 nft_trans_destroy(trans);
10313 } else {
e688a7f8 10314 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 10315 }
10316 break;
10317 case NFT_MSG_DELTABLE:
f80a612d 10318 case NFT_MSG_DESTROYTABLE:
f2a6d766 10319 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 10320 nft_trans_destroy(trans);
10321 break;
91c7b38d
PNA		 10322 case NFT_MSG_NEWCHAIN:
10323 if (nft_trans_chain_update(trans)) {
b9703ed4
PNA		 10324 nft_netdev_unregister_hooks(net,
10325 &nft_trans_chain_hooks(trans),
10326 true);
982f4051 10327 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 10328 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 10329 nft_trans_destroy(trans);
10330 } else {
4bedf9ee 10331 if (nft_trans_chain_bound(trans)) {
d0e2c7de
PNA		 10332 nft_trans_destroy(trans);
10333 break;
10334 }
1689f259 10335 nft_use_dec_restore(&trans->ctx.table->use);
1b2470e5 10336 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 10337 nf_tables_unregister_hook(trans->ctx.net,
10338 trans->ctx.table,
10339 trans->ctx.chain);
91c7b38d
PNA		 10340 }
10341 break;
10342 case NFT_MSG_DELCHAIN:
f80a612d 10343 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 10344 if (nft_trans_chain_update(trans)) {
10345 list_splice(&nft_trans_chain_hooks(trans),
10346 &nft_trans_basechain(trans)->hook_list);
10347 } else {
1689f259 10348 nft_use_inc_restore(&trans->ctx.table->use);
7d937b10
PNA		 10349 nft_clear(trans->ctx.net, trans->ctx.chain);
10350 }
91c7b38d
PNA		 10351 nft_trans_destroy(trans);
10352 break;
b380e5c7 10353 case NFT_MSG_NEWRULE:
4bedf9ee
PNA		 10354 if (nft_trans_rule_bound(trans)) {
10355 nft_trans_destroy(trans);
10356 break;
10357 }
1689f259 10358 nft_use_dec_restore(&trans->ctx.chain->use);
b380e5c7 10359 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 10360 nft_rule_expr_deactivate(&trans->ctx,
10361 nft_trans_rule(trans),
10362 NFT_TRANS_ABORT);
3c5e4462
PNA		 10363 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10364 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 10365 break;
10366 case NFT_MSG_DELRULE:
f80a612d 10367 case NFT_MSG_DESTROYRULE:
1689f259 10368 nft_use_inc_restore(&trans->ctx.chain->use);
889f7ee7 10369 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 10370 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 10371 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10372 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10373
37082f93 10374 nft_trans_destroy(trans);
b380e5c7 10375 break;
958bee14 10376 case NFT_MSG_NEWSET:
123b9961
PNA		 10377 if (nft_trans_set_update(trans)) {
10378 nft_trans_destroy(trans);
10379 break;
10380 }
1689f259 10381 nft_use_dec_restore(&trans->ctx.table->use);
6a0a8d10 10382 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 10383 nft_trans_destroy(trans);
10384 break;
10385 }
10386 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 10387 break;
10388 case NFT_MSG_DELSET:
f80a612d 10389 case NFT_MSG_DESTROYSET:
1689f259 10390 nft_use_inc_restore(&trans->ctx.table->use);
37a9cc52 10391 nft_clear(trans->ctx.net, nft_trans_set(trans));
628bd3e4
PNA		 10392 if (nft_trans_set(trans)->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
10393 nft_map_activate(&trans->ctx, nft_trans_set(trans));
10394
958bee14
PNA		 10395 nft_trans_destroy(trans);
10396 break;
60319eb1 10397 case NFT_MSG_NEWSETELEM:
6a0a8d10 10398 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 10399 nft_trans_destroy(trans);
10400 break;
10401 }
02263db0 10402 te = (struct nft_trans_elem *)trans->data;
0e1ea651
PNA		 10403 nft_setelem_remove(net, te->set, te->elem_priv);
10404 if (!nft_setelem_is_catchall(te->set, te->elem_priv))
aaa31047 10405 atomic_dec(&te->set->nelems);
212ed75d
PNA		 10406
10407 if (te->set->ops->abort &&
10408 list_empty(&te->set->pending_update)) {
10409 list_add_tail(&te->set->pending_update,
10410 &set_update_list);
10411 }
60319eb1
PNA		 10412 break;
10413 case NFT_MSG_DELSETELEM:
f80a612d 10414 case NFT_MSG_DESTROYSETELEM:
cc02e457
PM		 10415 te = (struct nft_trans_elem *)trans->data;
10416
0e1ea651
PNA		 10417 nft_setelem_data_activate(net, te->set, te->elem_priv);
10418 nft_setelem_activate(net, te->set, te->elem_priv);
10419 if (!nft_setelem_is_catchall(te->set, te->elem_priv))
aaa31047 10420 te->set->ndeact--;
cc02e457 10421
212ed75d
PNA		 10422 if (te->set->ops->abort &&
10423 list_empty(&te->set->pending_update)) {
10424 list_add_tail(&te->set->pending_update,
10425 &set_update_list);
10426 }
e5009240
PNA		 10427 nft_trans_destroy(trans);
10428 break;
10429 case NFT_MSG_NEWOBJ:
d62d0ba9 10430 if (nft_trans_obj_update(trans)) {
dad3bdee 10431 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 10432 nft_trans_destroy(trans);
10433 } else {
1689f259 10434 nft_use_dec_restore(&trans->ctx.table->use);
d62d0ba9
FFM		 10435 nft_obj_del(nft_trans_obj(trans));
10436 }
e5009240
PNA		 10437 break;
10438 case NFT_MSG_DELOBJ:
f80a612d 10439 case NFT_MSG_DESTROYOBJ:
1689f259 10440 nft_use_inc_restore(&trans->ctx.table->use);
e5009240 10441 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 10442 nft_trans_destroy(trans);
10443 break;
3b49e2e9 10444 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 10445 if (nft_trans_flowtable_update(trans)) {
10446 nft_unregister_flowtable_net_hooks(net,
10447 &nft_trans_flowtable_hooks(trans));
10448 } else {
1689f259 10449 nft_use_dec_restore(&trans->ctx.table->use);
78d9f48f
PNA		 10450 list_del_rcu(&nft_trans_flowtable(trans)->list);
10451 nft_unregister_flowtable_net_hooks(net,
10452 &nft_trans_flowtable(trans)->hook_list);
10453 }
3b49e2e9
PNA		 10454 break;
10455 case NFT_MSG_DELFLOWTABLE:
f80a612d 10456 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 10457 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 10458 list_splice(&nft_trans_flowtable_hooks(trans),
10459 &nft_trans_flowtable(trans)->hook_list);
abadb2f8 10460 } else {
1689f259 10461 nft_use_inc_restore(&trans->ctx.table->use);
abadb2f8
PNA		 10462 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
10463 }
3b49e2e9
PNA		 10464 nft_trans_destroy(trans);
10465 break;
37082f93 10466 }
37082f93
PNA		 10467 }
10468
212ed75d
PNA		 10469 nft_set_abort_update(&set_update_list);
10470
b326dd37
PNA		 10471 synchronize_rcu();
10472
a1cee076 10473 list_for_each_entry_safe_reverse(trans, next,
0854db2a 10474 &nft_net->commit_list, list) {
938154b9 10475 nft_trans_list_del(trans);
b326dd37 10476 nf_tables_abort_release(trans);
37082f93
PNA		 10477 }
10478
c0391b6a 10479 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 10480 nf_tables_module_autoload(net);
10481 else
10482 nf_tables_module_autoload_cleanup(net);
10483
37082f93
PNA		 10484 return 0;
10485}
10486
c0391b6a
PNA		 10487static int nf_tables_abort(struct net *net, struct sk_buff *skb,
10488 enum nfnl_abort_action action)
71ad00c5 10489{
d59d2f82 10490 struct nftables_pernet *nft_net = nft_pernet(net);
72034434
PNA		 10491 unsigned int gc_seq;
10492 int ret;
f102d66b 10493
72034434
PNA		 10494 gc_seq = nft_gc_seq_begin(nft_net);
10495 ret = __nf_tables_abort(net, action);
10496 nft_gc_seq_end(nft_net, gc_seq);
0854db2a 10497 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 10498
10499 return ret;
71ad00c5
FW		 10500}
10501
74e8bcd2
PNA		 10502static bool nf_tables_valid_genid(struct net *net, u32 genid)
10503{
d59d2f82 10504 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 10505 bool genid_ok;
10506
0854db2a 10507 mutex_lock(&nft_net->commit_mutex);
f102d66b 10508
0854db2a 10509 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 10510 if (!genid_ok)
0854db2a 10511 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 10512
10513 /* else, commit mutex has to be released by commit or abort function */
10514 return genid_ok;
74e8bcd2
PNA		 10515}
10516
96518518
PM		 10517static const struct nfnetlink_subsystem nf_tables_subsys = {
10518 .name = "nf_tables",
10519 .subsys_id = NFNL_SUBSYS_NFTABLES,
10520 .cb_count = NFT_MSG_MAX,
10521 .cb = nf_tables_cb,
0628b123
PNA		 10522 .commit = nf_tables_commit,
10523 .abort = nf_tables_abort,
74e8bcd2 10524 .valid_genid = nf_tables_valid_genid,
be2ab5b4 10525 .owner = THIS_MODULE,
96518518
PM		 10526};
10527
7210e4e3 10528int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 10529 enum nft_chain_types type)
7210e4e3
PNA		 10530{
10531 const struct nft_base_chain *basechain;
10532
f323d954 10533 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 10534 basechain = nft_base_chain(chain);
10535 if (basechain->type->type != type)
10536 return -EOPNOTSUPP;
10537 }
10538 return 0;
10539}
10540EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
10541
75e8d06d
PNA		 10542int nft_chain_validate_hooks(const struct nft_chain *chain,
10543 unsigned int hook_flags)
10544{
10545 struct nft_base_chain *basechain;
10546
f323d954 10547 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 10548 basechain = nft_base_chain(chain);
10549
c974a3a3 10550 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 10551 return 0;
10552
10553 return -EOPNOTSUPP;
10554 }
10555
10556 return 0;
10557}
10558EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
10559
20a69341
PM		 10560/*
10561 * Loop detection - walk through the ruleset beginning at the destination chain
10562 * of a new jump until either the source chain is reached (loop) or all
10563 * reachable chains have been traversed.
10564 *
10565 * The loop check is performed whenever a new jump verdict is added to an
10566 * expression or verdict map or a verdict map is bound to a new chain.
10567 */
10568
10569static int nf_tables_check_loops(const struct nft_ctx *ctx,
10570 const struct nft_chain *chain);
10571
6387aa6e
PNA		 10572static int nft_check_loops(const struct nft_ctx *ctx,
10573 const struct nft_set_ext *ext)
10574{
10575 const struct nft_data *data;
10576 int ret;
10577
10578 data = nft_set_ext_data(ext);
10579 switch (data->verdict.code) {
10580 case NFT_JUMP:
10581 case NFT_GOTO:
10582 ret = nf_tables_check_loops(ctx, data->verdict.chain);
10583 break;
10584 default:
10585 ret = 0;
10586 break;
10587 }
10588
10589 return ret;
10590}
10591
20a69341 10592static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 10593 struct nft_set *set,
20a69341 10594 const struct nft_set_iter *iter,
0e1ea651 10595 struct nft_elem_priv *elem_priv)
20a69341 10596{
0e1ea651 10597 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem_priv);
fe2811eb
PM		 10598
10599 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
10600 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 10601 return 0;
10602
6387aa6e 10603 return nft_check_loops(ctx, ext);
20a69341
PM		 10604}
10605
aaa31047
PNA		 10606static int nft_set_catchall_loops(const struct nft_ctx *ctx,
10607 struct nft_set *set)
10608{
10609 u8 genmask = nft_genmask_next(ctx->net);
10610 struct nft_set_elem_catchall *catchall;
10611 struct nft_set_ext *ext;
10612 int ret = 0;
10613
10614 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
10615 ext = nft_set_elem_ext(set, catchall->elem);
10616 if (!nft_set_elem_active(ext, genmask))
10617 continue;
10618
10619 ret = nft_check_loops(ctx, ext);
10620 if (ret < 0)
10621 return ret;
10622 }
10623
10624 return ret;
10625}
10626
20a69341
PM		 10627static int nf_tables_check_loops(const struct nft_ctx *ctx,
10628 const struct nft_chain *chain)
10629{
10630 const struct nft_rule *rule;
10631 const struct nft_expr *expr, *last;
de70185d 10632 struct nft_set *set;
20a69341
PM		 10633 struct nft_set_binding *binding;
10634 struct nft_set_iter iter;
20a69341
PM		 10635
10636 if (ctx->chain == chain)
10637 return -ELOOP;
10638
169384fb
FW		 10639 if (fatal_signal_pending(current))
10640 return -EINTR;
10641
20a69341
PM		 10642 list_for_each_entry(rule, &chain->rules, list) {
10643 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 10644 struct nft_immediate_expr *priv;
10645 const struct nft_data *data;
0ca743a5
PNA		 10646 int err;
10647
a654de8f 10648 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 10649 continue;
10650
a654de8f
PNA		 10651 priv = nft_expr_priv(expr);
10652 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 10653 continue;
20a69341 10654
a654de8f 10655 data = &priv->data;
1ca2e170 10656 switch (data->verdict.code) {
20a69341
PM		 10657 case NFT_JUMP:
10658 case NFT_GOTO:
1ca2e170
PM		 10659 err = nf_tables_check_loops(ctx,
10660 data->verdict.chain);
20a69341
PM		 10661 if (err < 0)
10662 return err;
c2168e6b 10663 break;
20a69341
PM		 10664 default:
10665 break;
10666 }
10667 }
10668 }
10669
10670 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 10671 if (!nft_is_active_next(ctx->net, set))
10672 continue;
20a69341
PM		 10673 if (!(set->flags & NFT_SET_MAP) ||
10674 set->dtype != NFT_DATA_VERDICT)
10675 continue;
10676
10677 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 10678 if (!(binding->flags & NFT_SET_MAP) ||
10679 binding->chain != chain)
20a69341
PM		 10680 continue;
10681
8588ac09 10682 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 10683 iter.skip = 0;
10684 iter.count = 0;
10685 iter.err = 0;
10686 iter.fn = nf_tables_loop_check_setelem;
10687
10688 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 10689 if (!iter.err)
10690 iter.err = nft_set_catchall_loops(ctx, set);
10691
20a69341
PM		 10692 if (iter.err < 0)
10693 return iter.err;
10694 }
10695 }
10696
10697 return 0;
10698}
10699
36b701fa
LGL		 10700/**
10701 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
10702 *
10703 * @attr: netlink attribute to fetch value from
10704 * @max: maximum value to be stored in dest
10705 * @dest: pointer to the variable
10706 *
10707 * Parse, check and store a given u32 netlink attribute into variable.
10708 * This function returns -ERANGE if the value goes over maximum value.
10709 * Otherwise a 0 is returned and the attribute value is stored in the
10710 * destination variable.
10711 */
f1d505bb 10712int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 10713{
09525a09 10714 u32 val;
36b701fa
LGL		 10715
10716 val = ntohl(nla_get_be32(attr));
10717 if (val > max)
10718 return -ERANGE;
10719
10720 *dest = val;
10721 return 0;
10722}
10723EXPORT_SYMBOL_GPL(nft_parse_u32_check);
10724
6c6f9f31 10725static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 10726{
49499c3e
PM		 10727 unsigned int reg;
10728
10729 reg = ntohl(nla_get_be32(attr));
10730 switch (reg) {
10731 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 10732 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
10733 break;
10734 case NFT_REG32_00...NFT_REG32_15:
10735 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
10736 break;
49499c3e 10737 default:
6e1acfa3 10738 return -ERANGE;
49499c3e 10739 }
6e1acfa3
PNA		 10740
10741 return 0;
b1c96ed3 10742}
b1c96ed3 10743
49499c3e
PM		 10744/**
10745 * nft_dump_register - dump a register value to a netlink attribute
10746 *
10747 * @skb: socket buffer
10748 * @attr: attribute number
10749 * @reg: register number
10750 *
10751 * Construct a netlink attribute containing the register number. For
10752 * compatibility reasons, register numbers being a multiple of 4 are
10753 * translated to the corresponding 128 bit register numbers.
10754 */
b1c96ed3
PM		 10755int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
10756{
49499c3e
PM		 10757 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
10758 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
10759 else
10760 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
10761
b1c96ed3
PM		 10762 return nla_put_be32(skb, attr, htonl(reg));
10763}
10764EXPORT_SYMBOL_GPL(nft_dump_register);
10765
4f16d25c 10766static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 10767{
49499c3e 10768 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 10769 return -EINVAL;
d07db988
PM		 10770 if (len == 0)
10771 return -EINVAL;
c593642c 10772 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 10773 return -ERANGE;
49499c3e 10774
96518518
PM		 10775 return 0;
10776}
4f16d25c
PNA		 10777
10778int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
10779{
10780 u32 reg;
10781 int err;
10782
6e1acfa3
PNA		 10783 err = nft_parse_register(attr, &reg);
10784 if (err < 0)
10785 return err;
10786
4f16d25c
PNA		 10787 err = nft_validate_register_load(reg, len);
10788 if (err < 0)
10789 return err;
10790
10791 *sreg = reg;
10792 return 0;
10793}
10794EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 10795
345023b0
PNA		 10796static int nft_validate_register_store(const struct nft_ctx *ctx,
10797 enum nft_registers reg,
10798 const struct nft_data *data,
10799 enum nft_data_types type,
10800 unsigned int len)
96518518 10801{
20a69341
PM		 10802 int err;
10803
96518518
PM		 10804 switch (reg) {
10805 case NFT_REG_VERDICT:
58f40ab6 10806 if (type != NFT_DATA_VERDICT)
96518518 10807 return -EINVAL;
20a69341 10808
58f40ab6 10809 if (data != NULL &&
1ca2e170
PM		 10810 (data->verdict.code == NFT_GOTO ||
10811 data->verdict.code == NFT_JUMP)) {
10812 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 10813 if (err < 0)
10814 return err;
20a69341
PM		 10815 }
10816
96518518
PM		 10817 return 0;
10818 default:
49499c3e 10819 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 10820 return -EINVAL;
45d9bcda
PM		 10821 if (len == 0)
10822 return -EINVAL;
49499c3e 10823 if (reg * NFT_REG32_SIZE + len >
c593642c 10824 sizeof_field(struct nft_regs, data))
45d9bcda 10825 return -ERANGE;
27e6d201 10826
96518518
PM		 10827 if (data != NULL && type != NFT_DATA_VALUE)
10828 return -EINVAL;
10829 return 0;
10830 }
10831}
345023b0
PNA		 10832
10833int nft_parse_register_store(const struct nft_ctx *ctx,
10834 const struct nlattr *attr, u8 *dreg,
10835 const struct nft_data *data,
10836 enum nft_data_types type, unsigned int len)
10837{
10838 int err;
10839 u32 reg;
10840
6e1acfa3
PNA		 10841 err = nft_parse_register(attr, &reg);
10842 if (err < 0)
10843 return err;
10844
345023b0
PNA		 10845 err = nft_validate_register_store(ctx, reg, data, type, len);
10846 if (err < 0)
10847 return err;
10848
10849 *dreg = reg;
10850 return 0;
10851}
10852EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 10853
10854static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
10855 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
10856 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
10857 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 10858 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 10859};
10860
10861static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
10862 struct nft_data_desc *desc, const struct nlattr *nla)
10863{
664b0f8c 10864 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 10865 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
10866 struct nft_chain *chain;
10867 int err;
10868
8cb08174
JB		 10869 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
10870 nft_verdict_policy, NULL);
96518518
PM		 10871 if (err < 0)
10872 return err;
10873
10874 if (!tb[NFTA_VERDICT_CODE])
10875 return -EINVAL;
ddbd8be6
FW		 10876
10877 /* zero padding hole for memcmp */
10878 memset(data, 0, sizeof(*data));
1ca2e170 10879 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 10880
1ca2e170 10881 switch (data->verdict.code) {
e0abdadc 10882 default:
1ca2e170 10883 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 10884 case NF_ACCEPT:
10885 case NF_DROP:
10886 case NF_QUEUE:
10887 break;
10888 default:
10889 return -EINVAL;
10890 }
954d8297 10891 fallthrough;
96518518
PM		 10892 case NFT_CONTINUE:
10893 case NFT_BREAK:
10894 case NFT_RETURN:
96518518
PM		 10895 break;
10896 case NFT_JUMP:
10897 case NFT_GOTO:
51d70f18
PNA		 10898 if (tb[NFTA_VERDICT_CHAIN]) {
10899 chain = nft_chain_lookup(ctx->net, ctx->table,
10900 tb[NFTA_VERDICT_CHAIN],
10901 genmask);
10902 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 10903 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
515ad530
TLSC		 10904 tb[NFTA_VERDICT_CHAIN_ID],
10905 genmask);
51d70f18
PNA		 10906 if (IS_ERR(chain))
10907 return PTR_ERR(chain);
10908 } else {
96518518 10909 return -EINVAL;
51d70f18
PNA		 10910 }
10911
96518518
PM		 10912 if (IS_ERR(chain))
10913 return PTR_ERR(chain);
f323d954 10914 if (nft_is_base_chain(chain))
96518518 10915 return -EOPNOTSUPP;
e02f0d39
PNA		 10916 if (nft_chain_is_bound(chain))
10917 return -EINVAL;
f323ef3a
PNA		 10918 if (desc->flags & NFT_DATA_DESC_SETELEM &&
10919 chain->flags & NFT_CHAIN_BINDING)
10920 return -EINVAL;
1689f259
PNA		 10921 if (!nft_use_inc(&chain->use))
10922 return -EMFILE;
96518518 10923
1ca2e170 10924 data->verdict.chain = chain;
96518518 10925 break;
96518518
PM		 10926 }
10927
4c4ed074 10928 desc->len = sizeof(data->verdict);
341b6941 10929
96518518
PM		 10930 return 0;
10931}
10932
10933static void nft_verdict_uninit(const struct nft_data *data)
10934{
d0e2c7de 10935 struct nft_chain *chain;
d0e2c7de 10936
1ca2e170 10937 switch (data->verdict.code) {
96518518
PM		 10938 case NFT_JUMP:
10939 case NFT_GOTO:
d0e2c7de 10940 chain = data->verdict.chain;
1689f259 10941 nft_use_dec(&chain->use);
96518518
PM		 10942 break;
10943 }
10944}
10945
33d5a7b1 10946int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 10947{
10948 struct nlattr *nest;
10949
ae0be8de 10950 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 10951 if (!nest)
10952 goto nla_put_failure;
10953
33d5a7b1 10954 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 10955 goto nla_put_failure;
10956
33d5a7b1 10957 switch (v->code) {
96518518
PM		 10958 case NFT_JUMP:
10959 case NFT_GOTO:
1ca2e170 10960 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 10961 v->chain->name))
96518518
PM		 10962 goto nla_put_failure;
10963 }
10964 nla_nest_end(skb, nest);
10965 return 0;
10966
10967nla_put_failure:
10968 return -1;
10969}
10970
d0a11fc3 10971static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 10972 struct nft_data *data, struct nft_data_desc *desc,
10973 const struct nlattr *nla)
96518518
PM		 10974{
10975 unsigned int len;
10976
10977 len = nla_len(nla);
10978 if (len == 0)
10979 return -EINVAL;
341b6941 10980 if (len > desc->size)
96518518 10981 return -EOVERFLOW;
341b6941
PNA		 10982 if (desc->len) {
10983 if (len != desc->len)
10984 return -EINVAL;
10985 } else {
10986 desc->len = len;
10987 }
96518518 10988
d0a11fc3 10989 nla_memcpy(data->data, nla, len);
341b6941 10990
96518518
PM		 10991 return 0;
10992}
10993
10994static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
10995 unsigned int len)
10996{
10997 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
10998}
10999
11000static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 11001 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 11002 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
11003};
11004
11005/**
11006 * nft_data_init - parse nf_tables data netlink attributes
11007 *
11008 * @ctx: context of the expression using the data
11009 * @data: destination struct nft_data
11010 * @desc: data description
11011 * @nla: netlink attribute containing data
11012 *
11013 * Parse the netlink data attributes and initialize a struct nft_data.
11014 * The type and length of data are returned in the data description.
11015 *
11016 * The caller can indicate that it only wants to accept data of type
11017 * NFT_DATA_VALUE by passing NULL for the ctx argument.
11018 */
341b6941 11019int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 11020 struct nft_data_desc *desc, const struct nlattr *nla)
11021{
11022 struct nlattr *tb[NFTA_DATA_MAX + 1];
11023 int err;
11024
341b6941
PNA		 11025 if (WARN_ON_ONCE(!desc->size))
11026 return -EINVAL;
11027
8cb08174
JB		 11028 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
11029 nft_data_policy, NULL);
96518518
PM		 11030 if (err < 0)
11031 return err;
11032
341b6941
PNA		 11033 if (tb[NFTA_DATA_VALUE]) {
11034 if (desc->type != NFT_DATA_VALUE)
11035 return -EINVAL;
11036
11037 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
11038 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
11039 if (desc->type != NFT_DATA_VERDICT)
11040 return -EINVAL;
11041
11042 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
11043 } else {
11044 err = -EINVAL;
11045 }
11046
11047 return err;
96518518
PM		 11048}
11049EXPORT_SYMBOL_GPL(nft_data_init);
11050
11051/**
59105446 11052 * nft_data_release - release a nft_data item
96518518
PM		 11053 *
11054 * @data: struct nft_data to release
11055 * @type: type of data
11056 *
11057 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
11058 * all others need to be released by calling this function.
11059 */
59105446 11060void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 11061{
960bd2c2 11062 if (type < NFT_DATA_VERDICT)
96518518 11063 return;
960bd2c2 11064 switch (type) {
96518518
PM		 11065 case NFT_DATA_VERDICT:
11066 return nft_verdict_uninit(data);
11067 default:
11068 WARN_ON(1);
11069 }
11070}
59105446 11071EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 11072
11073int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
11074 enum nft_data_types type, unsigned int len)
11075{
11076 struct nlattr *nest;
11077 int err;
11078
ae0be8de 11079 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 11080 if (nest == NULL)
11081 return -1;
11082
11083 switch (type) {
11084 case NFT_DATA_VALUE:
11085 err = nft_value_dump(skb, data, len);
11086 break;
11087 case NFT_DATA_VERDICT:
33d5a7b1 11088 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 11089 break;
11090 default:
11091 err = -EINVAL;
11092 WARN_ON(1);
11093 }
11094
11095 nla_nest_end(skb, nest);
11096 return err;
11097}
11098EXPORT_SYMBOL_GPL(nft_data_dump);
11099
5ebe0b0e
PNA		 11100int __nft_release_basechain(struct nft_ctx *ctx)
11101{
11102 struct nft_rule *rule, *nr;
11103
fa5950e4
FW		 11104 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
11105 return 0;
5ebe0b0e 11106
c974a3a3 11107 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 11108 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
11109 list_del(&rule->list);
1689f259 11110 nft_use_dec(&ctx->chain->use);
bb7b40ae 11111 nf_tables_rule_release(ctx, rule);
5ebe0b0e 11112 }
1b2470e5 11113 nft_chain_del(ctx->chain);
1689f259 11114 nft_use_dec(&ctx->table->use);
43a605f2 11115 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 11116
11117 return 0;
11118}
11119EXPORT_SYMBOL_GPL(__nft_release_basechain);
11120
00dfe9be
PNA		 11121static void __nft_release_hook(struct net *net, struct nft_table *table)
11122{
6069da44 11123 struct nft_flowtable *flowtable;
00dfe9be
PNA		 11124 struct nft_chain *chain;
11125
11126 list_for_each_entry(chain, &table->chains, list)
f9a43007 11127 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 11128 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 11129 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
11130 true);
00dfe9be
PNA		 11131}
11132
767d1216
PNA		 11133static void __nft_release_hooks(struct net *net)
11134{
d59d2f82 11135 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 11136 struct nft_table *table;
767d1216 11137
0854db2a 11138 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 11139 if (nft_table_has_owner(table))
11140 continue;
11141
00dfe9be 11142 __nft_release_hook(net, table);
2888b080 11143 }
767d1216
PNA		 11144}
11145
fd020332 11146static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 11147{
3b49e2e9 11148 struct nft_flowtable *flowtable, *nf;
df05ef87 11149 struct nft_chain *chain, *nc;
e5009240 11150 struct nft_object *obj, *ne;
df05ef87
PNA		 11151 struct nft_rule *rule, *nr;
11152 struct nft_set *set, *ns;
11153 struct nft_ctx ctx = {
11154 .net = net,
43a605f2 11155 .family = NFPROTO_NETDEV,
df05ef87
PNA		 11156 };
11157
fd020332
PNA		 11158 ctx.family = table->family;
11159 ctx.table = table;
11160 list_for_each_entry(chain, &table->chains, list) {
f15f29fd 11161 if (nft_chain_binding(chain))
751d460c
PNA		 11162 continue;
11163
fd020332
PNA		 11164 ctx.chain = chain;
11165 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
11166 list_del(&rule->list);
1689f259 11167 nft_use_dec(&chain->use);
fd020332 11168 nf_tables_rule_release(&ctx, rule);
df05ef87 11169 }
df05ef87 11170 }
fd020332
PNA		 11171 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
11172 list_del(&flowtable->list);
1689f259 11173 nft_use_dec(&table->use);
fd020332
PNA		 11174 nf_tables_flowtable_destroy(flowtable);
11175 }
11176 list_for_each_entry_safe(set, ns, &table->sets, list) {
11177 list_del(&set->list);
1689f259 11178 nft_use_dec(&table->use);
628bd3e4
PNA		 11179 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
11180 nft_map_deactivate(&ctx, set);
11181
fd020332
PNA		 11182 nft_set_destroy(&ctx, set);
11183 }
11184 list_for_each_entry_safe(obj, ne, &table->objects, list) {
11185 nft_obj_del(obj);
1689f259 11186 nft_use_dec(&table->use);
fd020332
PNA		 11187 nft_obj_destroy(&ctx, obj);
11188 }
11189 list_for_each_entry_safe(chain, nc, &table->chains, list) {
11190 ctx.chain = chain;
11191 nft_chain_del(chain);
1689f259 11192 nft_use_dec(&table->use);
fd020332
PNA		 11193 nf_tables_chain_destroy(&ctx);
11194 }
fd020332
PNA		 11195 nf_tables_table_destroy(&ctx);
11196}
11197
bd1777b3 11198static void __nft_release_tables(struct net *net)
fd020332 11199{
d59d2f82 11200 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 11201 struct nft_table *table, *nt;
11202
0854db2a 11203 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 11204 if (nft_table_has_owner(table))
6001a930
PNA		 11205 continue;
11206
a499b03b
FW		 11207 list_del(&table->list);
11208
fd020332 11209 __nft_release_table(net, table);
6001a930
PNA		 11210 }
11211}
11212
11213static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
11214 void *ptr)
11215{
a499b03b 11216 struct nft_table *table, *to_delete[8];
0854db2a 11217 struct nftables_pernet *nft_net;
6001a930 11218 struct netlink_notify *n = ptr;
6001a930 11219 struct net *net = n->net;
a499b03b
FW		 11220 unsigned int deleted;
11221 bool restart = false;
6a33d8b7 11222 unsigned int gc_seq;
6001a930
PNA		 11223
11224 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
11225 return NOTIFY_DONE;
11226
d59d2f82 11227 nft_net = nft_pernet(net);
a499b03b 11228 deleted = 0;
0854db2a 11229 mutex_lock(&nft_net->commit_mutex);
6a33d8b7
PNA		 11230
11231 gc_seq = nft_gc_seq_begin(nft_net);
11232
d4bc8271 11233 if (!list_empty(&nf_tables_destroy_list))
2c9f0293 11234 nf_tables_trans_destroy_flush_work();
a499b03b 11235again:
0854db2a 11236 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 11237 if (nft_table_has_owner(table) &&
11238 n->portid == table->nlpid) {
11239 __nft_release_hook(net, table);
a499b03b
FW		 11240 list_del_rcu(&table->list);
11241 to_delete[deleted++] = table;
11242 if (deleted >= ARRAY_SIZE(to_delete))
11243 break;
6001a930
PNA		 11244 }
11245 }
a499b03b
FW		 11246 if (deleted) {
11247 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 11248 synchronize_rcu();
a499b03b
FW		 11249 while (deleted)
11250 __nft_release_table(net, to_delete[--deleted]);
11251
11252 if (restart)
11253 goto again;
6001a930 11254 }
6a33d8b7
PNA		 11255 nft_gc_seq_end(nft_net, gc_seq);
11256
0854db2a 11257 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 11258
11259 return NOTIFY_DONE;
df05ef87
PNA		 11260}
11261
6001a930
PNA		 11262static struct notifier_block nft_nl_notifier = {
11263 .notifier_call = nft_rcv_nl_event,
11264};
11265
dd4cbef7
PNA		 11266static int __net_init nf_tables_init_net(struct net *net)
11267{
d59d2f82 11268 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 11269
11270 INIT_LIST_HEAD(&nft_net->tables);
11271 INIT_LIST_HEAD(&nft_net->commit_list);
938154b9 11272 INIT_LIST_HEAD(&nft_net->binding_list);
0854db2a
FW		 11273 INIT_LIST_HEAD(&nft_net->module_list);
11274 INIT_LIST_HEAD(&nft_net->notify_list);
11275 mutex_init(&nft_net->commit_mutex);
11276 nft_net->base_seq = 1;
5f68718b 11277 nft_net->gc_seq = 0;
4b80ced9 11278 nft_net->validate_state = NFT_VALIDATE_SKIP;
a654de8f 11279
dd4cbef7
PNA		 11280 return 0;
11281}
11282
767d1216
PNA		 11283static void __net_exit nf_tables_pre_exit_net(struct net *net)
11284{
3923b1e4
PNA		 11285 struct nftables_pernet *nft_net = nft_pernet(net);
11286
11287 mutex_lock(&nft_net->commit_mutex);
767d1216 11288 __nft_release_hooks(net);
3923b1e4 11289 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 11290}
11291
dd4cbef7
PNA		 11292static void __net_exit nf_tables_exit_net(struct net *net)
11293{
d59d2f82 11294 struct nftables_pernet *nft_net = nft_pernet(net);
6a33d8b7 11295 unsigned int gc_seq;
0854db2a
FW		 11296
11297 mutex_lock(&nft_net->commit_mutex);
6a33d8b7
PNA		 11298
11299 gc_seq = nft_gc_seq_begin(nft_net);
11300
03c1f1ef
SY		 11301 if (!list_empty(&nft_net->commit_list) ||
11302 !list_empty(&nft_net->module_list))
c0391b6a 11303 __nf_tables_abort(net, NFNL_ABORT_NONE);
6a33d8b7 11304
bd1777b3 11305 __nft_release_tables(net);
6a33d8b7
PNA		 11306
11307 nft_gc_seq_end(nft_net, gc_seq);
11308
0854db2a
FW		 11309 mutex_unlock(&nft_net->commit_mutex);
11310 WARN_ON_ONCE(!list_empty(&nft_net->tables));
11311 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
11312 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 11313}
11314
5f68718b
PNA		 11315static void nf_tables_exit_batch(struct list_head *net_exit_list)
11316{
11317 flush_work(&trans_gc_work);
11318}
11319
99633ab2 11320static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 11321 .init = nf_tables_init_net,
11322 .pre_exit = nf_tables_pre_exit_net,
11323 .exit = nf_tables_exit_net,
5f68718b 11324 .exit_batch = nf_tables_exit_batch,
0854db2a
FW		 11325 .id = &nf_tables_net_id,
11326 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 11327};
11328
96518518
PM		 11329static int __init nf_tables_module_init(void)
11330{
11331 int err;
11332
d209df3e
FW		 11333 err = register_pernet_subsys(&nf_tables_net_ops);
11334 if (err < 0)
11335 return err;
11336
11337 err = nft_chain_filter_init();
11338 if (err < 0)
6001a930 11339 goto err_chain_filter;
02c7b25e 11340
96518518
PM		 11341 err = nf_tables_core_module_init();
11342 if (err < 0)
6001a930 11343 goto err_core_module;
96518518 11344
d209df3e 11345 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 11346 if (err < 0)
6001a930 11347 goto err_netdev_notifier;
96518518 11348
4d44175a
FW		 11349 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
11350 if (err < 0)
6001a930 11351 goto err_rht_objname;
4d44175a 11352
06d392cb 11353 err = nft_offload_init();
11354 if (err < 0)
6001a930
PNA		 11355 goto err_offload;
11356
11357 err = netlink_register_notifier(&nft_nl_notifier);
11358 if (err < 0)
11359 goto err_netlink_notifier;
06d392cb 11360
d209df3e
FW		 11361 /* must be last */
11362 err = nfnetlink_subsys_register(&nf_tables_subsys);
11363 if (err < 0)
6001a930 11364 goto err_nfnl_subsys;
3b49e2e9 11365
c1deb065 11366 nft_chain_route_init();
3474a2c6 11367
d209df3e 11368 return err;
6001a930
PNA		 11369
11370err_nfnl_subsys:
11371 netlink_unregister_notifier(&nft_nl_notifier);
11372err_netlink_notifier:
06d392cb 11373 nft_offload_exit();
6001a930 11374err_offload:
4d44175a 11375 rhltable_destroy(&nft_objname_ht);
6001a930 11376err_rht_objname:
d209df3e 11377 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 11378err_netdev_notifier:
96518518 11379 nf_tables_core_module_exit();
6001a930 11380err_core_module:
d209df3e 11381 nft_chain_filter_fini();
6001a930 11382err_chain_filter:
d209df3e 11383 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 11384 return err;
11385}
11386
11387static void __exit nf_tables_module_exit(void)
11388{
11389 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 11390 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 11391 nft_offload_exit();
3b49e2e9 11392 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 11393 nft_chain_filter_fini();
c1deb065 11394 nft_chain_route_fini();
71ad00c5 11395 unregister_pernet_subsys(&nf_tables_net_ops);
5f68718b 11396 cancel_work_sync(&trans_gc_work);
0935d558 11397 cancel_work_sync(&trans_destroy_work);
1b1bc49c 11398 rcu_barrier();
4d44175a 11399 rhltable_destroy(&nft_objname_ht);
96518518 11400 nf_tables_core_module_exit();
96518518
PM		 11401}
11402
11403module_init(nf_tables_module_init);
11404module_exit(nf_tables_module_exit);
11405
11406MODULE_LICENSE("GPL");
11407MODULE_AUTHOR("Patrick McHardy <[email protected]>");
94090b23 11408MODULE_DESCRIPTION("Framework for packet filtering and classification");
96518518 11409MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Empty description
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