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netfilter: nf_tables: disallow element updates of bound anonymous sets
[linux-block.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 <kaber@trash.net>
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
FW		 33static LIST_HEAD(nf_tables_destroy_list);
34static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
96518518 35
a654de8f
PNA		 36enum {
37 NFT_VALIDATE_SKIP = 0,
38 NFT_VALIDATE_NEED,
39 NFT_VALIDATE_DO,
40};
41
4d44175a
FW		 42static struct rhltable nft_objname_ht;
43
1b2470e5
FW		 44static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
45static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
46static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
47
4d44175a
FW		 48static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
49static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
50static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
51
1b2470e5
FW		 52static const struct rhashtable_params nft_chain_ht_params = {
53 .head_offset = offsetof(struct nft_chain, rhlhead),
54 .key_offset = offsetof(struct nft_chain, name),
55 .hashfn = nft_chain_hash,
56 .obj_hashfn = nft_chain_hash_obj,
57 .obj_cmpfn = nft_chain_hash_cmp,
1b2470e5
FW		 58 .automatic_shrinking = true,
59};
60
4d44175a
FW		 61static const struct rhashtable_params nft_objname_ht_params = {
62 .head_offset = offsetof(struct nft_object, rhlhead),
63 .key_offset = offsetof(struct nft_object, key),
64 .hashfn = nft_objname_hash,
65 .obj_hashfn = nft_objname_hash_obj,
66 .obj_cmpfn = nft_objname_hash_cmp,
67 .automatic_shrinking = true,
68};
69
c520292f
RGB		 70struct nft_audit_data {
71 struct nft_table *table;
72 int entries;
73 int op;
74 struct list_head list;
75};
76
77static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
78 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
79 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
80 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
81 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
82 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
83 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
84 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
85 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
86 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
87 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
88 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
89 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
90 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
91 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
92 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
93 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
94 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
95 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
96 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
97 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
99 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
100 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
101 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
102 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
103};
104
00c320f9 105static void nft_validate_state_update(struct nft_table *table, u8 new_validate_state)
a654de8f 106{
00c320f9 107 switch (table->validate_state) {
a654de8f
PNA		 108 case NFT_VALIDATE_SKIP:
109 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
110 break;
111 case NFT_VALIDATE_NEED:
112 break;
113 case NFT_VALIDATE_DO:
114 if (new_validate_state == NFT_VALIDATE_NEED)
115 return;
116 }
117
00c320f9 118 table->validate_state = new_validate_state;
a654de8f 119}
0935d558
FW		 120static void nf_tables_trans_destroy_work(struct work_struct *w);
121static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
a654de8f 122
7c95f6d8 123static void nft_ctx_init(struct nft_ctx *ctx,
633c9a84 124 struct net *net,
7c95f6d8
PNA		 125 const struct sk_buff *skb,
126 const struct nlmsghdr *nlh,
36596dad 127 u8 family,
7c95f6d8
PNA		 128 struct nft_table *table,
129 struct nft_chain *chain,
130 const struct nlattr * const *nla)
131{
633c9a84 132 ctx->net = net;
36596dad 133 ctx->family = family;
26b2f552 134 ctx->level = 0;
128ad332
PNA		 135 ctx->table = table;
136 ctx->chain = chain;
137 ctx->nla = nla;
138 ctx->portid = NETLINK_CB(skb).portid;
139 ctx->report = nlmsg_report(nlh);
c9626a2c 140 ctx->flags = nlh->nlmsg_flags;
128ad332 141 ctx->seq = nlh->nlmsg_seq;
7c95f6d8
PNA		 142}
143
8411b644
PNA		 144static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
145 int msg_type, u32 size, gfp_t gfp)
1081d11b
PNA		 146{
147 struct nft_trans *trans;
148
8411b644 149 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
1081d11b
PNA		 150 if (trans == NULL)
151 return NULL;
152
58007785 153 INIT_LIST_HEAD(&trans->list);
b380e5c7 154 trans->msg_type = msg_type;
1081d11b
PNA		 155 trans->ctx = *ctx;
156
157 return trans;
158}
159
8411b644
PNA		 160static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
161 int msg_type, u32 size)
162{
163 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
164}
165
1081d11b
PNA		 166static void nft_trans_destroy(struct nft_trans *trans)
167{
168 list_del(&trans->list);
169 kfree(trans);
170}
171
26b5a571
PNA		 172static void __nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set,
173 bool bind)
f6ac8585 174{
0854db2a 175 struct nftables_pernet *nft_net;
f6ac8585
PNA		 176 struct net *net = ctx->net;
177 struct nft_trans *trans;
178
179 if (!nft_set_is_anonymous(set))
180 return;
181
d59d2f82 182 nft_net = nft_pernet(net);
0854db2a 183 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
6a0a8d10
PNA		 184 switch (trans->msg_type) {
185 case NFT_MSG_NEWSET:
186 if (nft_trans_set(trans) == set)
26b5a571 187 nft_trans_set_bound(trans) = bind;
6a0a8d10
PNA		 188 break;
189 case NFT_MSG_NEWSETELEM:
190 if (nft_trans_elem_set(trans) == set)
26b5a571 191 nft_trans_elem_set_bound(trans) = bind;
f6ac8585
PNA		 192 break;
193 }
194 }
195}
196
26b5a571
PNA		 197static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
198{
199 return __nft_set_trans_bind(ctx, set, true);
200}
201
202static void nft_set_trans_unbind(const struct nft_ctx *ctx, struct nft_set *set)
203{
204 return __nft_set_trans_bind(ctx, set, false);
205}
206
207static void __nft_chain_trans_bind(const struct nft_ctx *ctx,
208 struct nft_chain *chain, bool bind)
4bedf9ee
PNA		 209{
210 struct nftables_pernet *nft_net;
211 struct net *net = ctx->net;
212 struct nft_trans *trans;
213
214 if (!nft_chain_binding(chain))
215 return;
216
217 nft_net = nft_pernet(net);
218 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
219 switch (trans->msg_type) {
220 case NFT_MSG_NEWCHAIN:
221 if (nft_trans_chain(trans) == chain)
26b5a571 222 nft_trans_chain_bound(trans) = bind;
4bedf9ee
PNA		 223 break;
224 case NFT_MSG_NEWRULE:
225 if (trans->ctx.chain == chain)
26b5a571 226 nft_trans_rule_bound(trans) = bind;
4bedf9ee
PNA		 227 break;
228 }
229 }
230}
231
26b5a571
PNA		 232static void nft_chain_trans_bind(const struct nft_ctx *ctx,
233 struct nft_chain *chain)
234{
235 __nft_chain_trans_bind(ctx, chain, true);
236}
237
4bedf9ee
PNA		 238int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
239{
240 if (!nft_chain_binding(chain))
241 return 0;
242
243 if (nft_chain_binding(ctx->chain))
244 return -EOPNOTSUPP;
245
246 if (chain->bound)
247 return -EBUSY;
248
249 chain->bound = true;
250 chain->use++;
251 nft_chain_trans_bind(ctx, chain);
252
253 return 0;
254}
255
26b5a571
PNA		 256void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
257{
258 __nft_chain_trans_bind(ctx, chain, false);
259}
260
d54725cd
PNA		 261static int nft_netdev_register_hooks(struct net *net,
262 struct list_head *hook_list)
263{
264 struct nft_hook *hook;
265 int err, j;
266
267 j = 0;
268 list_for_each_entry(hook, hook_list, list) {
269 err = nf_register_net_hook(net, &hook->ops);
270 if (err < 0)
271 goto err_register;
272
273 j++;
274 }
275 return 0;
276
277err_register:
278 list_for_each_entry(hook, hook_list, list) {
279 if (j-- <= 0)
280 break;
281
282 nf_unregister_net_hook(net, &hook->ops);
283 }
284 return err;
285}
286
287static void nft_netdev_unregister_hooks(struct net *net,
f9a43007
PNA		 288 struct list_head *hook_list,
289 bool release_netdev)
d54725cd 290{
f9a43007 291 struct nft_hook *hook, *next;
d54725cd 292
f9a43007 293 list_for_each_entry_safe(hook, next, hook_list, list) {
d54725cd 294 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 295 if (release_netdev) {
296 list_del(&hook->list);
297 kfree_rcu(hook, rcu);
298 }
299 }
d54725cd
PNA		 300}
301
c974a3a3
PNA		 302static int nf_tables_register_hook(struct net *net,
303 const struct nft_table *table,
304 struct nft_chain *chain)
d8ee8f7c 305{
d54725cd 306 struct nft_base_chain *basechain;
a37061a6 307 const struct nf_hook_ops *ops;
ae6153b5 308
d8ee8f7c 309 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 310 !nft_is_base_chain(chain))
d8ee8f7c
PNA		 311 return 0;
312
4e25ceb8
FW		 313 basechain = nft_base_chain(chain);
314 ops = &basechain->ops;
ae6153b5 315
4e25ceb8
FW		 316 if (basechain->type->ops_register)
317 return basechain->type->ops_register(net, ops);
318
d3519cb8 319 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
1e9451cb
FW		 320 return nft_netdev_register_hooks(net, &basechain->hook_list);
321
322 return nf_register_net_hook(net, &basechain->ops);
d8ee8f7c
PNA		 323}
324
f9a43007
PNA		 325static void __nf_tables_unregister_hook(struct net *net,
326 const struct nft_table *table,
327 struct nft_chain *chain,
328 bool release_netdev)
c5598794 329{
d54725cd 330 struct nft_base_chain *basechain;
4e25ceb8
FW		 331 const struct nf_hook_ops *ops;
332
d8ee8f7c 333 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 334 !nft_is_base_chain(chain))
d8ee8f7c 335 return;
4e25ceb8
FW		 336 basechain = nft_base_chain(chain);
337 ops = &basechain->ops;
d8ee8f7c 338
4e25ceb8
FW		 339 if (basechain->type->ops_unregister)
340 return basechain->type->ops_unregister(net, ops);
341
d3519cb8 342 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
f9a43007
PNA		 343 nft_netdev_unregister_hooks(net, &basechain->hook_list,
344 release_netdev);
1e9451cb
FW		 345 else
346 nf_unregister_net_hook(net, &basechain->ops);
c5598794
AB		 347}
348
f9a43007
PNA		 349static void nf_tables_unregister_hook(struct net *net,
350 const struct nft_table *table,
351 struct nft_chain *chain)
352{
353 return __nf_tables_unregister_hook(net, table, chain, false);
354}
355
0854db2a
FW		 356static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
357{
d59d2f82 358 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a 359
0854db2a
FW		 360 list_add_tail(&trans->list, &nft_net->commit_list);
361}
362
ee01d542
AB		 363static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
364{
365 struct nft_trans *trans;
366
367 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
368 if (trans == NULL)
369 return -ENOMEM;
370
371 if (msg_type == NFT_MSG_NEWTABLE)
f2a6d766 372 nft_activate_next(ctx->net, ctx->table);
ee01d542 373
0854db2a 374 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 375 return 0;
376}
377
378static int nft_deltable(struct nft_ctx *ctx)
379{
380 int err;
381
382 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
383 if (err < 0)
384 return err;
385
f2a6d766 386 nft_deactivate_next(ctx->net, ctx->table);
ee01d542
AB		 387 return err;
388}
389
66293c46 390static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
ee01d542
AB		 391{
392 struct nft_trans *trans;
393
394 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
395 if (trans == NULL)
66293c46 396 return ERR_PTR(-ENOMEM);
ee01d542 397
74cccc3d 398 if (msg_type == NFT_MSG_NEWCHAIN) {
664b0f8c 399 nft_activate_next(ctx->net, ctx->chain);
ee01d542 400
74cccc3d
PNA		 401 if (ctx->nla[NFTA_CHAIN_ID]) {
402 nft_trans_chain_id(trans) =
403 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
404 }
405 }
4bedf9ee 406 nft_trans_chain(trans) = ctx->chain;
0854db2a 407 nft_trans_commit_list_add_tail(ctx->net, trans);
4bedf9ee 408
66293c46 409 return trans;
ee01d542
AB		 410}
411
412static int nft_delchain(struct nft_ctx *ctx)
413{
66293c46 414 struct nft_trans *trans;
ee01d542 415
66293c46
FW		 416 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
417 if (IS_ERR(trans))
418 return PTR_ERR(trans);
ee01d542
AB		 419
420 ctx->table->use--;
664b0f8c 421 nft_deactivate_next(ctx->net, ctx->chain);
ee01d542 422
66293c46 423 return 0;
ee01d542
AB		 424}
425
4bedf9ee 426void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae
PNA		 427{
428 struct nft_expr *expr;
429
430 expr = nft_expr_first(rule);
31cc578a 431 while (nft_expr_more(rule, expr)) {
bb7b40ae
PNA		 432 if (expr->ops->activate)
433 expr->ops->activate(ctx, expr);
434
435 expr = nft_expr_next(expr);
436 }
437}
438
4bedf9ee
PNA		 439void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule,
440 enum nft_trans_phase phase)
bb7b40ae
PNA		 441{
442 struct nft_expr *expr;
443
444 expr = nft_expr_first(rule);
31cc578a 445 while (nft_expr_more(rule, expr)) {
bb7b40ae 446 if (expr->ops->deactivate)
f6ac8585 447 expr->ops->deactivate(ctx, expr, phase);
bb7b40ae
PNA		 448
449 expr = nft_expr_next(expr);
450 }
451}
452
ee01d542
AB		 453static int
454nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
455{
456 /* You cannot delete the same rule twice */
889f7ee7
PNA		 457 if (nft_is_active_next(ctx->net, rule)) {
458 nft_deactivate_next(ctx->net, rule);
ee01d542
AB		 459 ctx->chain->use--;
460 return 0;
461 }
462 return -ENOENT;
463}
464
465static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
466 struct nft_rule *rule)
467{
468 struct nft_trans *trans;
469
470 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
471 if (trans == NULL)
472 return NULL;
473
1a94e38d
PNA		 474 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
475 nft_trans_rule_id(trans) =
476 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
477 }
ee01d542 478 nft_trans_rule(trans) = rule;
0854db2a 479 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 480
481 return trans;
482}
483
484static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
485{
63b48c73 486 struct nft_flow_rule *flow;
ee01d542
AB		 487 struct nft_trans *trans;
488 int err;
489
490 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
491 if (trans == NULL)
492 return -ENOMEM;
493
63b48c73
PNA		 494 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
495 flow = nft_flow_rule_create(ctx->net, rule);
496 if (IS_ERR(flow)) {
497 nft_trans_destroy(trans);
498 return PTR_ERR(flow);
499 }
500
501 nft_trans_flow_rule(trans) = flow;
502 }
503
ee01d542
AB		 504 err = nf_tables_delrule_deactivate(ctx, rule);
505 if (err < 0) {
506 nft_trans_destroy(trans);
507 return err;
508 }
f6ac8585 509 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
ee01d542
AB		 510
511 return 0;
512}
513
514static int nft_delrule_by_chain(struct nft_ctx *ctx)
515{
516 struct nft_rule *rule;
517 int err;
518
519 list_for_each_entry(rule, &ctx->chain->rules, list) {
23b7ca4f
PNA		 520 if (!nft_is_active_next(ctx->net, rule))
521 continue;
522
ee01d542
AB		 523 err = nft_delrule(ctx, rule);
524 if (err < 0)
525 return err;
526 }
527 return 0;
528}
529
123b9961
PNA		 530static int __nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
531 struct nft_set *set,
532 const struct nft_set_desc *desc)
ee01d542
AB		 533{
534 struct nft_trans *trans;
535
536 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
537 if (trans == NULL)
538 return -ENOMEM;
539
123b9961 540 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] && !desc) {
ee01d542
AB		 541 nft_trans_set_id(trans) =
542 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
37a9cc52 543 nft_activate_next(ctx->net, set);
ee01d542
AB		 544 }
545 nft_trans_set(trans) = set;
123b9961
PNA		 546 if (desc) {
547 nft_trans_set_update(trans) = true;
548 nft_trans_set_gc_int(trans) = desc->gc_int;
549 nft_trans_set_timeout(trans) = desc->timeout;
550 }
0854db2a 551 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 552
553 return 0;
554}
555
123b9961
PNA		 556static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
557 struct nft_set *set)
558{
559 return __nft_trans_set_add(ctx, msg_type, set, NULL);
560}
561
628bd3e4
PNA		 562static void nft_setelem_data_deactivate(const struct net *net,
563 const struct nft_set *set,
564 struct nft_set_elem *elem);
565
566static int nft_mapelem_deactivate(const struct nft_ctx *ctx,
567 struct nft_set *set,
568 const struct nft_set_iter *iter,
569 struct nft_set_elem *elem)
570{
571 nft_setelem_data_deactivate(ctx->net, set, elem);
572
573 return 0;
574}
575
576struct nft_set_elem_catchall {
577 struct list_head list;
578 struct rcu_head rcu;
579 void *elem;
580};
581
582static void nft_map_catchall_deactivate(const struct nft_ctx *ctx,
583 struct nft_set *set)
584{
585 u8 genmask = nft_genmask_next(ctx->net);
586 struct nft_set_elem_catchall *catchall;
587 struct nft_set_elem elem;
588 struct nft_set_ext *ext;
589
590 list_for_each_entry(catchall, &set->catchall_list, list) {
591 ext = nft_set_elem_ext(set, catchall->elem);
592 if (!nft_set_elem_active(ext, genmask))
593 continue;
594
595 elem.priv = catchall->elem;
596 nft_setelem_data_deactivate(ctx->net, set, &elem);
597 break;
598 }
599}
600
601static void nft_map_deactivate(const struct nft_ctx *ctx, struct nft_set *set)
602{
603 struct nft_set_iter iter = {
604 .genmask = nft_genmask_next(ctx->net),
605 .fn = nft_mapelem_deactivate,
606 };
607
608 set->ops->walk(ctx, set, &iter);
609 WARN_ON_ONCE(iter.err);
610
611 nft_map_catchall_deactivate(ctx, set);
612}
613
cd5125d8 614static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
ee01d542
AB		 615{
616 int err;
617
618 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
619 if (err < 0)
620 return err;
621
628bd3e4
PNA		 622 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
623 nft_map_deactivate(ctx, set);
624
37a9cc52 625 nft_deactivate_next(ctx->net, set);
ee01d542
AB		 626 ctx->table->use--;
627
628 return err;
629}
630
e5009240
PNA		 631static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
632 struct nft_object *obj)
633{
634 struct nft_trans *trans;
635
636 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
637 if (trans == NULL)
638 return -ENOMEM;
639
640 if (msg_type == NFT_MSG_NEWOBJ)
641 nft_activate_next(ctx->net, obj);
642
643 nft_trans_obj(trans) = obj;
0854db2a 644 nft_trans_commit_list_add_tail(ctx->net, trans);
e5009240
PNA		 645
646 return 0;
647}
648
649static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
650{
651 int err;
652
653 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
654 if (err < 0)
655 return err;
656
657 nft_deactivate_next(ctx->net, obj);
658 ctx->table->use--;
659
660 return err;
661}
662
3b49e2e9
PNA		 663static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
664 struct nft_flowtable *flowtable)
665{
666 struct nft_trans *trans;
667
668 trans = nft_trans_alloc(ctx, msg_type,
669 sizeof(struct nft_trans_flowtable));
670 if (trans == NULL)
671 return -ENOMEM;
672
673 if (msg_type == NFT_MSG_NEWFLOWTABLE)
674 nft_activate_next(ctx->net, flowtable);
675
2c9e4559 676 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
3b49e2e9 677 nft_trans_flowtable(trans) = flowtable;
0854db2a 678 nft_trans_commit_list_add_tail(ctx->net, trans);
3b49e2e9
PNA		 679
680 return 0;
681}
682
683static int nft_delflowtable(struct nft_ctx *ctx,
684 struct nft_flowtable *flowtable)
685{
686 int err;
687
688 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
689 if (err < 0)
690 return err;
691
692 nft_deactivate_next(ctx->net, flowtable);
693 ctx->table->use--;
694
695 return err;
696}
697
34cc9e52
PNA		 698static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
699{
700 int i;
701
702 for (i = track->regs[dreg].num_reg; i > 0; i--)
703 __nft_reg_track_cancel(track, dreg - i);
704}
705
706static void __nft_reg_track_update(struct nft_regs_track *track,
707 const struct nft_expr *expr,
708 u8 dreg, u8 num_reg)
709{
710 track->regs[dreg].selector = expr;
711 track->regs[dreg].bitwise = NULL;
712 track->regs[dreg].num_reg = num_reg;
713}
714
715void nft_reg_track_update(struct nft_regs_track *track,
716 const struct nft_expr *expr, u8 dreg, u8 len)
717{
718 unsigned int regcount;
719 int i;
720
721 __nft_reg_track_clobber(track, dreg);
722
723 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
724 for (i = 0; i < regcount; i++, dreg++)
725 __nft_reg_track_update(track, expr, dreg, i);
726}
727EXPORT_SYMBOL_GPL(nft_reg_track_update);
728
729void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
730{
731 unsigned int regcount;
732 int i;
733
734 __nft_reg_track_clobber(track, dreg);
735
736 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
737 for (i = 0; i < regcount; i++, dreg++)
738 __nft_reg_track_cancel(track, dreg);
739}
740EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
741
742void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
743{
744 track->regs[dreg].selector = NULL;
745 track->regs[dreg].bitwise = NULL;
746 track->regs[dreg].num_reg = 0;
747}
748EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
749
96518518
PM		 750/*
751 * Tables
752 */
753
36596dad 754static struct nft_table *nft_table_lookup(const struct net *net,
f2a6d766 755 const struct nlattr *nla,
6001a930 756 u8 family, u8 genmask, u32 nlpid)
96518518 757{
0854db2a 758 struct nftables_pernet *nft_net;
96518518
PM		 759 struct nft_table *table;
760
cac20fcd
PNA		 761 if (nla == NULL)
762 return ERR_PTR(-EINVAL);
763
d59d2f82 764 nft_net = nft_pernet(net);
0854db2a
FW		 765 list_for_each_entry_rcu(table, &nft_net->tables, list,
766 lockdep_is_held(&nft_net->commit_mutex)) {
f2a6d766 767 if (!nla_strcmp(nla, table->name) &&
98319cb9 768 table->family == family &&
6001a930
PNA		 769 nft_active_genmask(table, genmask)) {
770 if (nft_table_has_owner(table) &&
53479909 771 nlpid && table->nlpid != nlpid)
6001a930
PNA		 772 return ERR_PTR(-EPERM);
773
96518518 774 return table;
6001a930 775 }
96518518 776 }
cac20fcd
PNA		 777
778 return ERR_PTR(-ENOENT);
96518518
PM		 779}
780
3ecbfd65
HS		 781static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
782 const struct nlattr *nla,
e31f072f 783 u8 genmask, u32 nlpid)
3ecbfd65 784{
0854db2a 785 struct nftables_pernet *nft_net;
3ecbfd65
HS		 786 struct nft_table *table;
787
d59d2f82 788 nft_net = nft_pernet(net);
0854db2a 789 list_for_each_entry(table, &nft_net->tables, list) {
3ecbfd65 790 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
e31f072f
PNA		 791 nft_active_genmask(table, genmask)) {
792 if (nft_table_has_owner(table) &&
793 nlpid && table->nlpid != nlpid)
794 return ERR_PTR(-EPERM);
795
3ecbfd65 796 return table;
e31f072f 797 }
3ecbfd65 798 }
3ecbfd65
HS		 799
800 return ERR_PTR(-ENOENT);
801}
802
96518518
PM		 803static inline u64 nf_tables_alloc_handle(struct nft_table *table)
804{
805 return ++table->hgenerator;
806}
807
32537e91 808static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
9370761c 809
82603549
PNA		 810static const struct nft_chain_type *
811__nft_chain_type_get(u8 family, enum nft_chain_types type)
812{
813 if (family >= NFPROTO_NUMPROTO ||
814 type >= NFT_CHAIN_T_MAX)
815 return NULL;
816
817 return chain_type[family][type];
818}
819
32537e91 820static const struct nft_chain_type *
1ea26cca 821__nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
9370761c 822{
82603549 823 const struct nft_chain_type *type;
9370761c
PNA		 824 int i;
825
baae3e62 826 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
82603549
PNA		 827 type = __nft_chain_type_get(family, i);
828 if (!type)
829 continue;
830 if (!nla_strcmp(nla, type->name))
831 return type;
9370761c 832 }
baae3e62 833 return NULL;
9370761c
PNA		 834}
835
eb014de4
PNA		 836struct nft_module_request {
837 struct list_head list;
838 char module[MODULE_NAME_LEN];
839 bool done;
840};
841
452238e8 842#ifdef CONFIG_MODULES
cefa31a9
FW		 843__printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
844 ...)
452238e8
FW		 845{
846 char module_name[MODULE_NAME_LEN];
0854db2a 847 struct nftables_pernet *nft_net;
eb014de4 848 struct nft_module_request *req;
452238e8
FW		 849 va_list args;
850 int ret;
851
452238e8
FW		 852 va_start(args, fmt);
853 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
854 va_end(args);
9332d27d 855 if (ret >= MODULE_NAME_LEN)
eb014de4 856 return 0;
452238e8 857
d59d2f82 858 nft_net = nft_pernet(net);
0854db2a 859 list_for_each_entry(req, &nft_net->module_list, list) {
eb014de4
PNA		 860 if (!strcmp(req->module, module_name)) {
861 if (req->done)
862 return 0;
ec7470b8 863
eb014de4
PNA		 864 /* A request to load this module already exists. */
865 return -EAGAIN;
866 }
867 }
868
869 req = kmalloc(sizeof(*req), GFP_KERNEL);
870 if (!req)
871 return -ENOMEM;
872
873 req->done = false;
8556bceb 874 strscpy(req->module, module_name, MODULE_NAME_LEN);
0854db2a 875 list_add_tail(&req->list, &nft_net->module_list);
eb014de4
PNA		 876
877 return -EAGAIN;
452238e8 878}
cefa31a9 879EXPORT_SYMBOL_GPL(nft_request_module);
452238e8
FW		 880#endif
881
f102d66b
FW		 882static void lockdep_nfnl_nft_mutex_not_held(void)
883{
884#ifdef CONFIG_PROVE_LOCKING
c0700dfa
FW		 885 if (debug_locks)
886 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
f102d66b
FW		 887#endif
888}
889
32537e91 890static const struct nft_chain_type *
452238e8
FW		 891nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
892 u8 family, bool autoload)
9370761c 893{
32537e91 894 const struct nft_chain_type *type;
9370761c 895
1ea26cca 896 type = __nf_tables_chain_type_lookup(nla, family);
93b0806f
PM		 897 if (type != NULL)
898 return type;
f102d66b
FW		 899
900 lockdep_nfnl_nft_mutex_not_held();
9370761c 901#ifdef CONFIG_MODULES
93b0806f 902 if (autoload) {
eb014de4
PNA		 903 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
904 nla_len(nla),
905 (const char *)nla_data(nla)) == -EAGAIN)
93b0806f 906 return ERR_PTR(-EAGAIN);
9370761c
PNA		 907 }
908#endif
93b0806f 909 return ERR_PTR(-ENOENT);
9370761c
PNA		 910}
911
802b8051
PNA		 912static __be16 nft_base_seq(const struct net *net)
913{
d59d2f82 914 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 915
916 return htons(nft_net->base_seq & 0xffff);
802b8051
PNA		 917}
918
96518518 919static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
1cae565e
PNA		 920 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
921 .len = NFT_TABLE_MAXNAMELEN - 1 },
9ddf6323 922 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
3ecbfd65 923 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
7a81575b
JGG		 924 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
925 .len = NFT_USERDATA_MAXLEN }
96518518
PM		 926};
927
84d7fce6
PNA		 928static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
929 u32 portid, u32 seq, int event, u32 flags,
930 int family, const struct nft_table *table)
96518518
PM		 931{
932 struct nlmsghdr *nlh;
96518518 933
dedb67c4 934 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 935 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
936 NFNETLINK_V0, nft_base_seq(net));
937 if (!nlh)
96518518
PM		 938 goto nla_put_failure;
939
9ddf6323 940 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
3ecbfd65
HS		 941 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
942 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
943 NFTA_TABLE_PAD))
96518518 944 goto nla_put_failure;
28339b21
PNA		 945
946 if (event == NFT_MSG_DELTABLE) {
947 nlmsg_end(skb, nlh);
948 return 0;
949 }
950
951 if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
952 htonl(table->flags & NFT_TABLE_F_MASK)))
953 goto nla_put_failure;
954
6001a930
PNA		 955 if (nft_table_has_owner(table) &&
956 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
957 goto nla_put_failure;
96518518 958
7a81575b
JGG		 959 if (table->udata) {
960 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
961 goto nla_put_failure;
962 }
963
053c095a
JB		 964 nlmsg_end(skb, nlh);
965 return 0;
96518518
PM		 966
967nla_put_failure:
968 nlmsg_trim(skb, nlh);
969 return -1;
970}
971
67cc570e
PNA		 972struct nftnl_skb_parms {
973 bool report;
974};
975#define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
976
977static void nft_notify_enqueue(struct sk_buff *skb, bool report,
978 struct list_head *notify_list)
979{
980 NFT_CB(skb).report = report;
981 list_add_tail(&skb->list, notify_list);
982}
983
25e94a99 984static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
96518518 985{
0854db2a 986 struct nftables_pernet *nft_net;
96518518 987 struct sk_buff *skb;
6fb721cf 988 u16 flags = 0;
96518518
PM		 989 int err;
990
128ad332
PNA		 991 if (!ctx->report &&
992 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 993 return;
96518518 994
96518518
PM		 995 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
996 if (skb == NULL)
997 goto err;
998
6fb721cf
PNA		 999 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1000 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1001
84d7fce6 1002 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1003 event, flags, ctx->family, ctx->table);
96518518
PM		 1004 if (err < 0) {
1005 kfree_skb(skb);
1006 goto err;
1007 }
1008
d59d2f82 1009 nft_net = nft_pernet(ctx->net);
0854db2a 1010 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1011 return;
96518518 1012err:
25e94a99 1013 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1014}
1015
1016static int nf_tables_dump_tables(struct sk_buff *skb,
1017 struct netlink_callback *cb)
1018{
1019 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
0854db2a 1020 struct nftables_pernet *nft_net;
96518518
PM		 1021 const struct nft_table *table;
1022 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1023 struct net *net = sock_net(skb->sk);
96518518
PM		 1024 int family = nfmsg->nfgen_family;
1025
e688a7f8 1026 rcu_read_lock();
d59d2f82 1027 nft_net = nft_pernet(net);
34002783 1028 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1029
0854db2a 1030 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1031 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1032 continue;
1033
36596dad
PNA		 1034 if (idx < s_idx)
1035 goto cont;
1036 if (idx > s_idx)
1037 memset(&cb->args[1], 0,
1038 sizeof(cb->args) - sizeof(cb->args[0]));
1039 if (!nft_is_active(net, table))
1040 continue;
1041 if (nf_tables_fill_table_info(skb, net,
1042 NETLINK_CB(cb->skb).portid,
1043 cb->nlh->nlmsg_seq,
1044 NFT_MSG_NEWTABLE, NLM_F_MULTI,
98319cb9 1045 table->family, table) < 0)
36596dad
PNA		 1046 goto done;
1047
1048 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1049cont:
36596dad 1050 idx++;
96518518
PM		 1051 }
1052done:
e688a7f8 1053 rcu_read_unlock();
96518518
PM		 1054 cb->args[0] = idx;
1055 return skb->len;
1056}
1057
d9adf22a
FW		 1058static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
1059 const struct nlmsghdr *nlh,
1060 struct netlink_dump_control *c)
1061{
1062 int err;
1063
1064 if (!try_module_get(THIS_MODULE))
1065 return -EINVAL;
1066
1067 rcu_read_unlock();
1068 err = netlink_dump_start(nlsk, skb, nlh, c);
1069 rcu_read_lock();
1070 module_put(THIS_MODULE);
1071
1072 return err;
1073}
1074
1075/* called with rcu_read_lock held */
797d4980
PNA		 1076static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
1077 const struct nlattr * const nla[])
96518518 1078{
797d4980
PNA		 1079 struct netlink_ext_ack *extack = info->extack;
1080 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1081 u8 family = info->nfmsg->nfgen_family;
96518518 1082 const struct nft_table *table;
797d4980 1083 struct net *net = info->net;
96518518 1084 struct sk_buff *skb2;
96518518
PM		 1085 int err;
1086
797d4980 1087 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1088 struct netlink_dump_control c = {
1089 .dump = nf_tables_dump_tables,
d9adf22a 1090 .module = THIS_MODULE,
96518518 1091 };
d9adf22a 1092
797d4980 1093 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1094 }
1095
6001a930 1096 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
36dd1bcc
PNA		 1097 if (IS_ERR(table)) {
1098 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
96518518 1099 return PTR_ERR(table);
36dd1bcc 1100 }
96518518 1101
d9adf22a 1102 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1103 if (!skb2)
1104 return -ENOMEM;
1105
84d7fce6 1106 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
797d4980
PNA		 1107 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
1108 0, family, table);
96518518 1109 if (err < 0)
ee921183 1110 goto err_fill_table_info;
96518518 1111
ee921183 1112 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1113
ee921183 1114err_fill_table_info:
96518518
PM		 1115 kfree_skb(skb2);
1116 return err;
1117}
1118
c9c17211 1119static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
10435c11
F		 1120{
1121 struct nft_chain *chain;
1122 u32 i = 0;
1123
1124 list_for_each_entry(chain, &table->chains, list) {
1125 if (!nft_is_active_next(net, chain))
1126 continue;
f323d954 1127 if (!nft_is_base_chain(chain))
10435c11
F		 1128 continue;
1129
1130 if (cnt && i++ == cnt)
1131 break;
1132
1e9451cb 1133 nf_tables_unregister_hook(net, table, chain);
10435c11
F		 1134 }
1135}
1136
c9c17211 1137static int nf_tables_table_enable(struct net *net, struct nft_table *table)
9ddf6323
PNA		 1138{
1139 struct nft_chain *chain;
1140 int err, i = 0;
1141
1142 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1143 if (!nft_is_active_next(net, chain))
1144 continue;
f323d954 1145 if (!nft_is_base_chain(chain))
d2012975
PNA		 1146 continue;
1147
1e9451cb 1148 err = nf_tables_register_hook(net, table, chain);
9ddf6323 1149 if (err < 0)
d54725cd 1150 goto err_register_hooks;
9ddf6323
PNA		 1151
1152 i++;
1153 }
1154 return 0;
d54725cd
PNA		 1155
1156err_register_hooks:
10435c11 1157 if (i)
c9c17211 1158 nft_table_disable(net, table, i);
9ddf6323
PNA		 1159 return err;
1160}
1161
c9c17211 1162static void nf_tables_table_disable(struct net *net, struct nft_table *table)
9ddf6323 1163{
179d9ba5 1164 table->flags &= ~NFT_TABLE_F_DORMANT;
c9c17211 1165 nft_table_disable(net, table, 0);
179d9ba5 1166 table->flags |= NFT_TABLE_F_DORMANT;
9ddf6323
PNA		 1167}
1168
179d9ba5
PNA		 1169#define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1170#define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1171#define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1172#define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1173 __NFT_TABLE_F_WAS_AWAKEN)
0ce7cf41 1174
e1aaca93 1175static int nf_tables_updtable(struct nft_ctx *ctx)
9ddf6323 1176{
55dd6f93 1177 struct nft_trans *trans;
e1aaca93 1178 u32 flags;
179d9ba5 1179 int ret;
9ddf6323 1180
e1aaca93
PNA		 1181 if (!ctx->nla[NFTA_TABLE_FLAGS])
1182 return 0;
9ddf6323 1183
e1aaca93 1184 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1185 if (flags & ~NFT_TABLE_F_MASK)
1186 return -EOPNOTSUPP;
e1aaca93 1187
63283dd2
PNA		 1188 if (flags == ctx->table->flags)
1189 return 0;
1190
9cc0001a
PNA		 1191 if ((nft_table_has_owner(ctx->table) &&
1192 !(flags & NFT_TABLE_F_OWNER)) ||
1193 (!nft_table_has_owner(ctx->table) &&
1194 flags & NFT_TABLE_F_OWNER))
1195 return -EOPNOTSUPP;
1196
55dd6f93
PNA		 1197 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1198 sizeof(struct nft_trans_table));
1199 if (trans == NULL)
1200 return -ENOMEM;
9ddf6323 1201
e1aaca93
PNA		 1202 if ((flags & NFT_TABLE_F_DORMANT) &&
1203 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
179d9ba5
PNA		 1204 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1205 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1206 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
e1aaca93
PNA		 1207 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1208 ctx->table->flags & NFT_TABLE_F_DORMANT) {
179d9ba5
PNA		 1209 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1210 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1211 ret = nf_tables_table_enable(ctx->net, ctx->table);
1212 if (ret < 0)
1213 goto err_register_hooks;
1214
1215 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1216 }
9ddf6323
PNA		 1217 }
1218
55dd6f93 1219 nft_trans_table_update(trans) = true;
0854db2a 1220 nft_trans_commit_list_add_tail(ctx->net, trans);
179d9ba5 1221
55dd6f93 1222 return 0;
179d9ba5
PNA		 1223
1224err_register_hooks:
55dd6f93 1225 nft_trans_destroy(trans);
9ddf6323
PNA		 1226 return ret;
1227}
1228
1b2470e5
FW		 1229static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1230{
1231 const char *name = data;
1232
1233 return jhash(name, strlen(name), seed);
1234}
1235
1236static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1237{
1238 const struct nft_chain *chain = data;
1239
1240 return nft_chain_hash(chain->name, 0, seed);
1241}
1242
1243static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1244 const void *ptr)
1245{
1246 const struct nft_chain *chain = ptr;
1247 const char *name = arg->key;
1248
1249 return strcmp(chain->name, name);
1250}
1251
4d44175a
FW		 1252static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1253{
1254 const struct nft_object_hash_key *k = data;
1255
1256 seed ^= hash_ptr(k->table, 32);
1257
1258 return jhash(k->name, strlen(k->name), seed);
1259}
1260
1261static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1262{
1263 const struct nft_object *obj = data;
1264
1265 return nft_objname_hash(&obj->key, 0, seed);
1266}
1267
1268static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1269 const void *ptr)
1270{
1271 const struct nft_object_hash_key *k = arg->key;
1272 const struct nft_object *obj = ptr;
1273
1274 if (obj->key.table != k->table)
1275 return -1;
1276
1277 return strcmp(obj->key.name, k->name);
1278}
1279
f1082dd3
PS		 1280static bool nft_supported_family(u8 family)
1281{
1282 return false
1283#ifdef CONFIG_NF_TABLES_INET
1284 || family == NFPROTO_INET
1285#endif
1286#ifdef CONFIG_NF_TABLES_IPV4
1287 || family == NFPROTO_IPV4
1288#endif
1289#ifdef CONFIG_NF_TABLES_ARP
1290 || family == NFPROTO_ARP
1291#endif
1292#ifdef CONFIG_NF_TABLES_NETDEV
1293 || family == NFPROTO_NETDEV
1294#endif
1295#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1296 || family == NFPROTO_BRIDGE
1297#endif
1298#ifdef CONFIG_NF_TABLES_IPV6
1299 || family == NFPROTO_IPV6
1300#endif
1301 ;
1302}
1303
7dab8ee3
PNA		 1304static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1305 const struct nlattr * const nla[])
96518518 1306{
7dab8ee3 1307 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 1308 struct netlink_ext_ack *extack = info->extack;
1309 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1310 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1311 struct net *net = info->net;
36dd1bcc
PNA		 1312 const struct nlattr *attr;
1313 struct nft_table *table;
e1aaca93 1314 struct nft_ctx ctx;
7a81575b 1315 u32 flags = 0;
55dd6f93 1316 int err;
96518518 1317
f1082dd3
PS		 1318 if (!nft_supported_family(family))
1319 return -EOPNOTSUPP;
1320
0854db2a 1321 lockdep_assert_held(&nft_net->commit_mutex);
36dd1bcc 1322 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1323 table = nft_table_lookup(net, attr, family, genmask,
1324 NETLINK_CB(skb).portid);
96518518
PM		 1325 if (IS_ERR(table)) {
1326 if (PTR_ERR(table) != -ENOENT)
1327 return PTR_ERR(table);
1a28ad74 1328 } else {
7dab8ee3 1329 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 1330 NL_SET_BAD_ATTR(extack, attr);
96518518 1331 return -EEXIST;
36dd1bcc 1332 }
7dab8ee3 1333 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518 1334 return -EOPNOTSUPP;
e1aaca93 1335
7dab8ee3
PNA		 1336 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1337
e1aaca93 1338 return nf_tables_updtable(&ctx);
96518518
PM		 1339 }
1340
c5c1f975
PM		 1341 if (nla[NFTA_TABLE_FLAGS]) {
1342 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1343 if (flags & ~NFT_TABLE_F_MASK)
1344 return -EOPNOTSUPP;
c5c1f975
PM		 1345 }
1346
ffdb210e 1347 err = -ENOMEM;
33758c89 1348 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
ffdb210e 1349 if (table == NULL)
98319cb9 1350 goto err_kzalloc;
96518518 1351
00c320f9 1352 table->validate_state = NFT_VALIDATE_SKIP;
33758c89 1353 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
e46abbcc 1354 if (table->name == NULL)
98319cb9 1355 goto err_strdup;
e46abbcc 1356
7a81575b 1357 if (nla[NFTA_TABLE_USERDATA]) {
33758c89 1358 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
7a81575b
JGG		 1359 if (table->udata == NULL)
1360 goto err_table_udata;
1361
85db827a 1362 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
7a81575b
JGG		 1363 }
1364
1b2470e5
FW		 1365 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1366 if (err)
1367 goto err_chain_ht;
1368
96518518 1369 INIT_LIST_HEAD(&table->chains);
20a69341 1370 INIT_LIST_HEAD(&table->sets);
e5009240 1371 INIT_LIST_HEAD(&table->objects);
3b49e2e9 1372 INIT_LIST_HEAD(&table->flowtables);
98319cb9 1373 table->family = family;
c5c1f975 1374 table->flags = flags;
ab482c6b 1375 table->handle = ++nft_net->table_handle;
6001a930
PNA		 1376 if (table->flags & NFT_TABLE_F_OWNER)
1377 table->nlpid = NETLINK_CB(skb).portid;
9ddf6323 1378
7dab8ee3 1379 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
55dd6f93 1380 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
ffdb210e 1381 if (err < 0)
98319cb9 1382 goto err_trans;
ffdb210e 1383
0854db2a 1384 list_add_tail_rcu(&table->list, &nft_net->tables);
96518518 1385 return 0;
98319cb9 1386err_trans:
1b2470e5
FW		 1387 rhltable_destroy(&table->chains_ht);
1388err_chain_ht:
7a81575b
JGG		 1389 kfree(table->udata);
1390err_table_udata:
e46abbcc 1391 kfree(table->name);
98319cb9 1392err_strdup:
ffdb210e 1393 kfree(table);
98319cb9 1394err_kzalloc:
ffdb210e 1395 return err;
96518518
PM		 1396}
1397
b9ac12ef
AB		 1398static int nft_flush_table(struct nft_ctx *ctx)
1399{
3b49e2e9 1400 struct nft_flowtable *flowtable, *nft;
b9ac12ef 1401 struct nft_chain *chain, *nc;
e5009240 1402 struct nft_object *obj, *ne;
b9ac12ef 1403 struct nft_set *set, *ns;
3b49e2e9 1404 int err;
b9ac12ef 1405
a2f18db0 1406 list_for_each_entry(chain, &ctx->table->chains, list) {
664b0f8c
PNA		 1407 if (!nft_is_active_next(ctx->net, chain))
1408 continue;
1409
d0e2c7de
PNA		 1410 if (nft_chain_is_bound(chain))
1411 continue;
1412
b9ac12ef
AB		 1413 ctx->chain = chain;
1414
1415 err = nft_delrule_by_chain(ctx);
1416 if (err < 0)
1417 goto out;
b9ac12ef
AB		 1418 }
1419
1420 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
37a9cc52
PNA		 1421 if (!nft_is_active_next(ctx->net, set))
1422 continue;
1423
408070d6 1424 if (nft_set_is_anonymous(set) &&
b9ac12ef
AB		 1425 !list_empty(&set->bindings))
1426 continue;
1427
1428 err = nft_delset(ctx, set);
1429 if (err < 0)
1430 goto out;
1431 }
1432
3b49e2e9 1433 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
335178d5
FW		 1434 if (!nft_is_active_next(ctx->net, flowtable))
1435 continue;
1436
3b49e2e9
PNA		 1437 err = nft_delflowtable(ctx, flowtable);
1438 if (err < 0)
1439 goto out;
1440 }
1441
e5009240 1442 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
335178d5
FW		 1443 if (!nft_is_active_next(ctx->net, obj))
1444 continue;
1445
e5009240
PNA		 1446 err = nft_delobj(ctx, obj);
1447 if (err < 0)
1448 goto out;
1449 }
1450
a2f18db0 1451 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
664b0f8c
PNA		 1452 if (!nft_is_active_next(ctx->net, chain))
1453 continue;
1454
d0e2c7de
PNA		 1455 if (nft_chain_is_bound(chain))
1456 continue;
1457
a2f18db0
PNA		 1458 ctx->chain = chain;
1459
1460 err = nft_delchain(ctx);
1461 if (err < 0)
1462 goto out;
1463 }
1464
b9ac12ef
AB		 1465 err = nft_deltable(ctx);
1466out:
1467 return err;
1468}
1469
1470static int nft_flush(struct nft_ctx *ctx, int family)
1471{
d59d2f82 1472 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
b9ac12ef 1473 const struct nlattr * const *nla = ctx->nla;
d59d2f82 1474 struct nft_table *table, *nt;
b9ac12ef
AB		 1475 int err = 0;
1476
0854db2a 1477 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
98319cb9 1478 if (family != AF_UNSPEC && table->family != family)
b9ac12ef
AB		 1479 continue;
1480
98319cb9 1481 ctx->family = table->family;
f2a6d766 1482
36596dad
PNA		 1483 if (!nft_is_active_next(ctx->net, table))
1484 continue;
b9ac12ef 1485
6001a930
PNA		 1486 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1487 continue;
1488
36596dad
PNA		 1489 if (nla[NFTA_TABLE_NAME] &&
1490 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1491 continue;
b9ac12ef 1492
36596dad
PNA		 1493 ctx->table = table;
1494
1495 err = nft_flush_table(ctx);
1496 if (err < 0)
1497 goto out;
b9ac12ef
AB		 1498 }
1499out:
1500 return err;
1501}
1502
7dab8ee3
PNA		 1503static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1504 const struct nlattr * const nla[])
96518518 1505{
7dab8ee3
PNA		 1506 struct netlink_ext_ack *extack = info->extack;
1507 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1508 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1509 struct net *net = info->net;
36dd1bcc
PNA		 1510 const struct nlattr *attr;
1511 struct nft_table *table;
55dd6f93 1512 struct nft_ctx ctx;
96518518 1513
7dab8ee3 1514 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
3ecbfd65
HS		 1515 if (family == AF_UNSPEC ||
1516 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
b9ac12ef
AB		 1517 return nft_flush(&ctx, family);
1518
36dd1bcc
PNA		 1519 if (nla[NFTA_TABLE_HANDLE]) {
1520 attr = nla[NFTA_TABLE_HANDLE];
e31f072f
PNA		 1521 table = nft_table_lookup_byhandle(net, attr, genmask,
1522 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 1523 } else {
1524 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1525 table = nft_table_lookup(net, attr, family, genmask,
1526 NETLINK_CB(skb).portid);
36dd1bcc 1527 }
3ecbfd65 1528
36dd1bcc 1529 if (IS_ERR(table)) {
f80a612d
FFM		 1530 if (PTR_ERR(table) == -ENOENT &&
1531 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
1532 return 0;
1533
36dd1bcc 1534 NL_SET_BAD_ATTR(extack, attr);
96518518 1535 return PTR_ERR(table);
36dd1bcc 1536 }
96518518 1537
7dab8ee3 1538 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
a8278400
PNA		 1539 table->use > 0)
1540 return -EBUSY;
1541
98319cb9 1542 ctx.family = family;
b9ac12ef 1543 ctx.table = table;
55dd6f93 1544
b9ac12ef 1545 return nft_flush_table(&ctx);
96518518
PM		 1546}
1547
55dd6f93
PNA		 1548static void nf_tables_table_destroy(struct nft_ctx *ctx)
1549{
fa5950e4
FW		 1550 if (WARN_ON(ctx->table->use > 0))
1551 return;
4fefee57 1552
1b2470e5 1553 rhltable_destroy(&ctx->table->chains_ht);
e46abbcc 1554 kfree(ctx->table->name);
bc7a7082 1555 kfree(ctx->table->udata);
55dd6f93 1556 kfree(ctx->table);
55dd6f93
PNA		 1557}
1558
cc07eeb0 1559void nft_register_chain_type(const struct nft_chain_type *ctype)
96518518 1560{
96518518 1561 nfnl_lock(NFNL_SUBSYS_NFTABLES);
82603549 1562 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
cc07eeb0
PNA		 1563 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1564 return;
96518518 1565 }
9370761c 1566 chain_type[ctype->family][ctype->type] = ctype;
96518518 1567 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
96518518 1568}
9370761c 1569EXPORT_SYMBOL_GPL(nft_register_chain_type);
96518518 1570
32537e91 1571void nft_unregister_chain_type(const struct nft_chain_type *ctype)
96518518 1572{
96518518 1573 nfnl_lock(NFNL_SUBSYS_NFTABLES);
9370761c 1574 chain_type[ctype->family][ctype->type] = NULL;
96518518
PM		 1575 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1576}
9370761c 1577EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
96518518
PM		 1578
1579/*
1580 * Chains
1581 */
1582
1583static struct nft_chain *
cac20fcd 1584nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
96518518
PM		 1585{
1586 struct nft_chain *chain;
1587
1588 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1589 if (chain->handle == handle &&
1590 nft_active_genmask(chain, genmask))
96518518
PM		 1591 return chain;
1592 }
1593
1594 return ERR_PTR(-ENOENT);
1595}
1596
4d44175a 1597static bool lockdep_commit_lock_is_held(const struct net *net)
f102d66b
FW		 1598{
1599#ifdef CONFIG_PROVE_LOCKING
d59d2f82 1600 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 1601
1602 return lockdep_is_held(&nft_net->commit_mutex);
f102d66b
FW		 1603#else
1604 return true;
1605#endif
1606}
1607
1608static struct nft_chain *nft_chain_lookup(struct net *net,
1609 struct nft_table *table,
cac20fcd 1610 const struct nlattr *nla, u8 genmask)
96518518 1611{
1b2470e5
FW		 1612 char search[NFT_CHAIN_MAXNAMELEN + 1];
1613 struct rhlist_head *tmp, *list;
96518518
PM		 1614 struct nft_chain *chain;
1615
1616 if (nla == NULL)
1617 return ERR_PTR(-EINVAL);
1618
872f6903 1619 nla_strscpy(search, nla, sizeof(search));
96518518 1620
1b2470e5 1621 WARN_ON(!rcu_read_lock_held() &&
f102d66b 1622 !lockdep_commit_lock_is_held(net));
1b2470e5
FW		 1623
1624 chain = ERR_PTR(-ENOENT);
1625 rcu_read_lock();
1626 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1627 if (!list)
1628 goto out_unlock;
1629
1630 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1631 if (nft_active_genmask(chain, genmask))
1632 goto out_unlock;
1633 }
1634 chain = ERR_PTR(-ENOENT);
1635out_unlock:
1636 rcu_read_unlock();
1637 return chain;
96518518
PM		 1638}
1639
1640static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
b2fbd044
LZ		 1641 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1642 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 1643 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1644 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1645 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1646 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
0ca743a5 1647 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
9332d27d
FW		 1648 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1649 .len = NFT_MODULE_AUTOLOAD_LIMIT },
0ca743a5 1650 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
c9626a2c 1651 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
74cccc3d 1652 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
002f2176
JGG		 1653 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1654 .len = NFT_USERDATA_MAXLEN },
96518518
PM		 1655};
1656
1657static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1658 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1659 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
2cbce139
PNA		 1660 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1661 .len = IFNAMSIZ - 1 },
96518518
PM		 1662};
1663
0ca743a5
PNA		 1664static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1665{
1666 struct nft_stats *cpu_stats, total;
1667 struct nlattr *nest;
ce355e20
ED		 1668 unsigned int seq;
1669 u64 pkts, bytes;
0ca743a5
PNA		 1670 int cpu;
1671
edbd82c5
FW		 1672 if (!stats)
1673 return 0;
1674
0ca743a5
PNA		 1675 memset(&total, 0, sizeof(total));
1676 for_each_possible_cpu(cpu) {
1677 cpu_stats = per_cpu_ptr(stats, cpu);
ce355e20 1678 do {
d120d1a6 1679 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
ce355e20
ED		 1680 pkts = cpu_stats->pkts;
1681 bytes = cpu_stats->bytes;
d120d1a6 1682 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
ce355e20
ED		 1683 total.pkts += pkts;
1684 total.bytes += bytes;
0ca743a5 1685 }
ae0be8de 1686 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
0ca743a5
PNA		 1687 if (nest == NULL)
1688 goto nla_put_failure;
1689
b46f6ded
ND		 1690 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1691 NFTA_COUNTER_PAD) ||
1692 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1693 NFTA_COUNTER_PAD))
0ca743a5
PNA		 1694 goto nla_put_failure;
1695
1696 nla_nest_end(skb, nest);
1697 return 0;
1698
1699nla_put_failure:
1700 return -ENOSPC;
1701}
1702
d54725cd 1703static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
b9703ed4
PNA		 1704 const struct nft_base_chain *basechain,
1705 const struct list_head *hook_list)
d54725cd
PNA		 1706{
1707 const struct nf_hook_ops *ops = &basechain->ops;
1708 struct nft_hook *hook, *first = NULL;
1709 struct nlattr *nest, *nest_devs;
1710 int n = 0;
1711
1712 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1713 if (nest == NULL)
1714 goto nla_put_failure;
1715 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1716 goto nla_put_failure;
1717 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1718 goto nla_put_failure;
1719
d3519cb8 1720 if (nft_base_chain_netdev(family, ops->hooknum)) {
d54725cd 1721 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
bd058763
GI		 1722 if (!nest_devs)
1723 goto nla_put_failure;
b9703ed4
PNA		 1724
1725 if (!hook_list)
1726 hook_list = &basechain->hook_list;
1727
1728 list_for_each_entry(hook, hook_list, list) {
d54725cd
PNA		 1729 if (!first)
1730 first = hook;
1731
1732 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1733 hook->ops.dev->name))
1734 goto nla_put_failure;
1735 n++;
1736 }
1737 nla_nest_end(skb, nest_devs);
1738
1739 if (n == 1 &&
1740 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1741 goto nla_put_failure;
1742 }
1743 nla_nest_end(skb, nest);
1744
1745 return 0;
1746nla_put_failure:
1747 return -1;
1748}
1749
84d7fce6
PNA		 1750static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1751 u32 portid, u32 seq, int event, u32 flags,
1752 int family, const struct nft_table *table,
b9703ed4
PNA		 1753 const struct nft_chain *chain,
1754 const struct list_head *hook_list)
96518518
PM		 1755{
1756 struct nlmsghdr *nlh;
96518518 1757
dedb67c4 1758 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 1759 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1760 NFNETLINK_V0, nft_base_seq(net));
1761 if (!nlh)
96518518
PM		 1762 goto nla_put_failure;
1763
28339b21
PNA		 1764 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name) ||
1765 nla_put_string(skb, NFTA_CHAIN_NAME, chain->name) ||
1766 nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
b46f6ded 1767 NFTA_CHAIN_PAD))
96518518 1768 goto nla_put_failure;
28339b21 1769
7d937b10 1770 if (event == NFT_MSG_DELCHAIN && !hook_list) {
28339b21
PNA		 1771 nlmsg_end(skb, nlh);
1772 return 0;
1773 }
96518518 1774
f323d954 1775 if (nft_is_base_chain(chain)) {
0ca743a5 1776 const struct nft_base_chain *basechain = nft_base_chain(chain);
edbd82c5 1777 struct nft_stats __percpu *stats;
0ca743a5 1778
b9703ed4 1779 if (nft_dump_basechain_hook(skb, family, basechain, hook_list))
2cbce139 1780 goto nla_put_failure;
9370761c 1781
0ca743a5
PNA		 1782 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1783 htonl(basechain->policy)))
1784 goto nla_put_failure;
1785
baae3e62
PM		 1786 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1787 goto nla_put_failure;
0ca743a5 1788
edbd82c5
FW		 1789 stats = rcu_dereference_check(basechain->stats,
1790 lockdep_commit_lock_is_held(net));
1791 if (nft_dump_stats(skb, stats))
0ca743a5 1792 goto nla_put_failure;
96518518
PM		 1793 }
1794
d0e2c7de
PNA		 1795 if (chain->flags &&
1796 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1797 goto nla_put_failure;
1798
0ca743a5
PNA		 1799 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1800 goto nla_put_failure;
1801
002f2176
JGG		 1802 if (chain->udata &&
1803 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1804 goto nla_put_failure;
1805
053c095a
JB		 1806 nlmsg_end(skb, nlh);
1807 return 0;
96518518
PM		 1808
1809nla_put_failure:
1810 nlmsg_trim(skb, nlh);
1811 return -1;
1812}
1813
b9703ed4
PNA		 1814static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event,
1815 const struct list_head *hook_list)
96518518 1816{
0854db2a 1817 struct nftables_pernet *nft_net;
96518518 1818 struct sk_buff *skb;
6fb721cf 1819 u16 flags = 0;
96518518
PM		 1820 int err;
1821
128ad332
PNA		 1822 if (!ctx->report &&
1823 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1824 return;
96518518 1825
96518518
PM		 1826 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1827 if (skb == NULL)
1828 goto err;
1829
6fb721cf
PNA		 1830 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1831 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1832
84d7fce6 1833 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1834 event, flags, ctx->family, ctx->table,
b9703ed4 1835 ctx->chain, hook_list);
96518518
PM		 1836 if (err < 0) {
1837 kfree_skb(skb);
1838 goto err;
1839 }
1840
d59d2f82 1841 nft_net = nft_pernet(ctx->net);
0854db2a 1842 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1843 return;
96518518 1844err:
25e94a99 1845 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1846}
1847
1848static int nf_tables_dump_chains(struct sk_buff *skb,
1849 struct netlink_callback *cb)
1850{
1851 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
96518518 1852 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1853 struct net *net = sock_net(skb->sk);
96518518 1854 int family = nfmsg->nfgen_family;
0854db2a 1855 struct nftables_pernet *nft_net;
d59d2f82
PNA		 1856 const struct nft_table *table;
1857 const struct nft_chain *chain;
96518518 1858
e688a7f8 1859 rcu_read_lock();
d59d2f82 1860 nft_net = nft_pernet(net);
34002783 1861 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1862
0854db2a 1863 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1864 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1865 continue;
1866
36596dad
PNA		 1867 list_for_each_entry_rcu(chain, &table->chains, list) {
1868 if (idx < s_idx)
1869 goto cont;
1870 if (idx > s_idx)
1871 memset(&cb->args[1], 0,
1872 sizeof(cb->args) - sizeof(cb->args[0]));
1873 if (!nft_is_active(net, chain))
1874 continue;
1875 if (nf_tables_fill_chain_info(skb, net,
1876 NETLINK_CB(cb->skb).portid,
1877 cb->nlh->nlmsg_seq,
1878 NFT_MSG_NEWCHAIN,
1879 NLM_F_MULTI,
98319cb9 1880 table->family, table,
b9703ed4 1881 chain, NULL) < 0)
36596dad 1882 goto done;
38e029f1 1883
36596dad 1884 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1885cont:
36596dad 1886 idx++;
96518518
PM		 1887 }
1888 }
1889done:
e688a7f8 1890 rcu_read_unlock();
96518518
PM		 1891 cb->args[0] = idx;
1892 return skb->len;
1893}
1894
d9adf22a 1895/* called with rcu_read_lock held */
797d4980
PNA		 1896static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1897 const struct nlattr * const nla[])
96518518 1898{
797d4980
PNA		 1899 struct netlink_ext_ack *extack = info->extack;
1900 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1901 u8 family = info->nfmsg->nfgen_family;
96518518 1902 const struct nft_chain *chain;
797d4980 1903 struct net *net = info->net;
1b2470e5 1904 struct nft_table *table;
96518518 1905 struct sk_buff *skb2;
96518518
PM		 1906 int err;
1907
797d4980 1908 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1909 struct netlink_dump_control c = {
1910 .dump = nf_tables_dump_chains,
d9adf22a 1911 .module = THIS_MODULE,
96518518 1912 };
d9adf22a 1913
797d4980 1914 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1915 }
1916
6001a930 1917 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
36dd1bcc
PNA		 1918 if (IS_ERR(table)) {
1919 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 1920 return PTR_ERR(table);
36dd1bcc 1921 }
96518518 1922
f102d66b 1923 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
36dd1bcc
PNA		 1924 if (IS_ERR(chain)) {
1925 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
96518518 1926 return PTR_ERR(chain);
36dd1bcc 1927 }
96518518 1928
d9adf22a 1929 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1930 if (!skb2)
1931 return -ENOMEM;
1932
84d7fce6 1933 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 1934 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
b9703ed4 1935 0, family, table, chain, NULL);
96518518 1936 if (err < 0)
ee921183 1937 goto err_fill_chain_info;
96518518 1938
ee921183 1939 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1940
ee921183 1941err_fill_chain_info:
96518518
PM		 1942 kfree_skb(skb2);
1943 return err;
1944}
1945
0ca743a5
PNA		 1946static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1947 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1948 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1949};
1950
ff3cd7b3 1951static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
0ca743a5
PNA		 1952{
1953 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1954 struct nft_stats __percpu *newstats;
1955 struct nft_stats *stats;
1956 int err;
1957
8cb08174
JB		 1958 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1959 nft_counter_policy, NULL);
0ca743a5 1960 if (err < 0)
ff3cd7b3 1961 return ERR_PTR(err);
0ca743a5
PNA		 1962
1963 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
ff3cd7b3 1964 return ERR_PTR(-EINVAL);
0ca743a5 1965
ce355e20 1966 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
0ca743a5 1967 if (newstats == NULL)
ff3cd7b3 1968 return ERR_PTR(-ENOMEM);
0ca743a5
PNA		 1969
1970 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1971 * are not exposed to userspace.
1972 */
e8781f70 1973 preempt_disable();
0ca743a5
PNA		 1974 stats = this_cpu_ptr(newstats);
1975 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
1976 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
e8781f70 1977 preempt_enable();
0ca743a5 1978
ff3cd7b3
PNA		 1979 return newstats;
1980}
1981
53315ac6 1982static void nft_chain_stats_replace(struct nft_trans *trans)
ff3cd7b3 1983{
53315ac6 1984 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
0befd061 1985
53315ac6 1986 if (!nft_trans_chain_stats(trans))
b88825de
PNA		 1987 return;
1988
b685b534
PM		 1989 nft_trans_chain_stats(trans) =
1990 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
1991 lockdep_commit_lock_is_held(trans->ctx.net));
53315ac6
FW		 1992
1993 if (!nft_trans_chain_stats(trans))
bbb8c61f 1994 static_branch_inc(&nft_counters_enabled);
0ca743a5
PNA		 1995}
1996
0cbc06b3
FW		 1997static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
1998{
2c865a8a
PNA		 1999 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
2000 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
0cbc06b3
FW		 2001
2002 if (g0 != g1)
2003 kvfree(g1);
2004 kvfree(g0);
2005
2006 /* should be NULL either via abort or via successful commit */
2c865a8a
PNA		 2007 WARN_ON_ONCE(chain->blob_next);
2008 kvfree(chain->blob_next);
0cbc06b3
FW		 2009}
2010
d0e2c7de 2011void nf_tables_chain_destroy(struct nft_ctx *ctx)
91c7b38d 2012{
43a605f2 2013 struct nft_chain *chain = ctx->chain;
d54725cd 2014 struct nft_hook *hook, *next;
43a605f2 2015
fa5950e4
FW		 2016 if (WARN_ON(chain->use > 0))
2017 return;
91c7b38d 2018
0cbc06b3
FW		 2019 /* no concurrent access possible anymore */
2020 nf_tables_chain_free_chain_rules(chain);
2021
f323d954 2022 if (nft_is_base_chain(chain)) {
2cbce139
PNA		 2023 struct nft_base_chain *basechain = nft_base_chain(chain);
2024
d3519cb8 2025 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
d54725cd
PNA		 2026 list_for_each_entry_safe(hook, next,
2027 &basechain->hook_list, list) {
2028 list_del_rcu(&hook->list);
2029 kfree_rcu(hook, rcu);
2030 }
2031 }
2cbce139 2032 module_put(basechain->type->owner);
4c05ec47 2033 if (rcu_access_pointer(basechain->stats)) {
9f08ea84 2034 static_branch_dec(&nft_counters_enabled);
4c05ec47
TY		 2035 free_percpu(rcu_dereference_raw(basechain->stats));
2036 }
b7263e07 2037 kfree(chain->name);
002f2176 2038 kfree(chain->udata);
2cbce139 2039 kfree(basechain);
91c7b38d 2040 } else {
b7263e07 2041 kfree(chain->name);
002f2176 2042 kfree(chain->udata);
91c7b38d
PNA		 2043 kfree(chain);
2044 }
2045}
2046
3f0465a9
PNA		 2047static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
2048 const struct nlattr *attr)
2049{
2050 struct net_device *dev;
2051 char ifname[IFNAMSIZ];
2052 struct nft_hook *hook;
2053 int err;
2054
33758c89 2055 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
3f0465a9
PNA		 2056 if (!hook) {
2057 err = -ENOMEM;
2058 goto err_hook_alloc;
2059 }
2060
872f6903 2061 nla_strscpy(ifname, attr, IFNAMSIZ);
42f1c271
PNA		 2062 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
2063 * indirectly serializing all the other holders of the commit_mutex with
2064 * the rtnl_mutex.
2065 */
3f0465a9
PNA		 2066 dev = __dev_get_by_name(net, ifname);
2067 if (!dev) {
2068 err = -ENOENT;
2069 goto err_hook_dev;
2070 }
2071 hook->ops.dev = dev;
2072
2073 return hook;
2074
2075err_hook_dev:
2076 kfree(hook);
2077err_hook_alloc:
2078 return ERR_PTR(err);
2079}
2080
abadb2f8
PNA		 2081static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
2082 const struct nft_hook *this)
b75a3e83
PNA		 2083{
2084 struct nft_hook *hook;
2085
2086 list_for_each_entry(hook, hook_list, list) {
2087 if (this->ops.dev == hook->ops.dev)
abadb2f8 2088 return hook;
b75a3e83
PNA		 2089 }
2090
abadb2f8 2091 return NULL;
b75a3e83
PNA		 2092}
2093
3f0465a9
PNA		 2094static int nf_tables_parse_netdev_hooks(struct net *net,
2095 const struct nlattr *attr,
c3c060ad
PNA		 2096 struct list_head *hook_list,
2097 struct netlink_ext_ack *extack)
3f0465a9
PNA		 2098{
2099 struct nft_hook *hook, *next;
2100 const struct nlattr *tmp;
2101 int rem, n = 0, err;
2102
2103 nla_for_each_nested(tmp, attr, rem) {
2104 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
2105 err = -EINVAL;
2106 goto err_hook;
2107 }
2108
2109 hook = nft_netdev_hook_alloc(net, tmp);
2110 if (IS_ERR(hook)) {
c3c060ad 2111 NL_SET_BAD_ATTR(extack, tmp);
3f0465a9
PNA		 2112 err = PTR_ERR(hook);
2113 goto err_hook;
2114 }
b75a3e83 2115 if (nft_hook_list_find(hook_list, hook)) {
c3c060ad 2116 NL_SET_BAD_ATTR(extack, tmp);
cd77e75b 2117 kfree(hook);
b75a3e83
PNA		 2118 err = -EEXIST;
2119 goto err_hook;
2120 }
3f0465a9
PNA		 2121 list_add_tail(&hook->list, hook_list);
2122 n++;
2123
cb662ac6 2124 if (n == NFT_NETDEVICE_MAX) {
3f0465a9
PNA		 2125 err = -EFBIG;
2126 goto err_hook;
2127 }
2128 }
3f0465a9
PNA		 2129
2130 return 0;
2131
2132err_hook:
2133 list_for_each_entry_safe(hook, next, hook_list, list) {
2134 list_del(&hook->list);
2135 kfree(hook);
2136 }
2137 return err;
2138}
2139
508f8ccd
PNA		 2140struct nft_chain_hook {
2141 u32 num;
84ba7dd7 2142 s32 priority;
32537e91 2143 const struct nft_chain_type *type;
d54725cd 2144 struct list_head list;
508f8ccd
PNA		 2145};
2146
207296f1 2147static int nft_chain_parse_netdev(struct net *net, struct nlattr *tb[],
c3c060ad 2148 struct list_head *hook_list,
207296f1 2149 struct netlink_ext_ack *extack, u32 flags)
d54725cd
PNA		 2150{
2151 struct nft_hook *hook;
2152 int err;
2153
2154 if (tb[NFTA_HOOK_DEV]) {
2155 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
c3c060ad
PNA		 2156 if (IS_ERR(hook)) {
2157 NL_SET_BAD_ATTR(extack, tb[NFTA_HOOK_DEV]);
d54725cd 2158 return PTR_ERR(hook);
c3c060ad 2159 }
d54725cd
PNA		 2160
2161 list_add_tail(&hook->list, hook_list);
2162 } else if (tb[NFTA_HOOK_DEVS]) {
2163 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
c3c060ad 2164 hook_list, extack);
d54725cd
PNA		 2165 if (err < 0)
2166 return err;
05abe445 2167
d54725cd
PNA		 2168 }
2169
207296f1
PNA		 2170 if (flags & NFT_CHAIN_HW_OFFLOAD &&
2171 list_empty(hook_list))
2172 return -EINVAL;
2173
d54725cd
PNA		 2174 return 0;
2175}
2176
508f8ccd 2177static int nft_chain_parse_hook(struct net *net,
b9703ed4 2178 struct nft_base_chain *basechain,
508f8ccd 2179 const struct nlattr * const nla[],
36596dad 2180 struct nft_chain_hook *hook, u8 family,
207296f1 2181 u32 flags, struct netlink_ext_ack *extack)
508f8ccd 2182{
d59d2f82 2183 struct nftables_pernet *nft_net = nft_pernet(net);
508f8ccd 2184 struct nlattr *ha[NFTA_HOOK_MAX + 1];
32537e91 2185 const struct nft_chain_type *type;
508f8ccd
PNA		 2186 int err;
2187
0854db2a 2188 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b
FW		 2189 lockdep_nfnl_nft_mutex_not_held();
2190
8cb08174
JB		 2191 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2192 nla[NFTA_CHAIN_HOOK],
2193 nft_hook_policy, NULL);
508f8ccd
PNA		 2194 if (err < 0)
2195 return err;
2196
b9703ed4
PNA		 2197 if (!basechain) {
2198 if (!ha[NFTA_HOOK_HOOKNUM] ||
8509f62b
PNA		 2199 !ha[NFTA_HOOK_PRIORITY]) {
2200 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2201 return -ENOENT;
2202 }
508f8ccd 2203
b9703ed4
PNA		 2204 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2205 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
508f8ccd 2206
b9703ed4
PNA		 2207 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2208 if (!type)
2209 return -EOPNOTSUPP;
82603549 2210
b9703ed4
PNA		 2211 if (nla[NFTA_CHAIN_TYPE]) {
2212 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
2213 family, true);
2214 if (IS_ERR(type)) {
2215 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2216 return PTR_ERR(type);
2217 }
983c4fcb 2218 }
b9703ed4
PNA		 2219 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
2220 return -EOPNOTSUPP;
84ba7dd7 2221
b9703ed4
PNA		 2222 if (type->type == NFT_CHAIN_T_NAT &&
2223 hook->priority <= NF_IP_PRI_CONNTRACK)
2224 return -EOPNOTSUPP;
2225 } else {
2226 if (ha[NFTA_HOOK_HOOKNUM]) {
2227 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2228 if (hook->num != basechain->ops.hooknum)
2229 return -EOPNOTSUPP;
2230 }
2231 if (ha[NFTA_HOOK_PRIORITY]) {
2232 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2233 if (hook->priority != basechain->ops.priority)
2234 return -EOPNOTSUPP;
2235 }
2236
2237 type = basechain->type;
2238 }
84ba7dd7 2239
983c4fcb
PNA		 2240 if (!try_module_get(type->owner)) {
2241 if (nla[NFTA_CHAIN_TYPE])
2242 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
508f8ccd 2243 return -ENOENT;
983c4fcb 2244 }
508f8ccd
PNA		 2245
2246 hook->type = type;
2247
d54725cd 2248 INIT_LIST_HEAD(&hook->list);
d3519cb8 2249 if (nft_base_chain_netdev(family, hook->num)) {
207296f1 2250 err = nft_chain_parse_netdev(net, ha, &hook->list, extack, flags);
d54725cd 2251 if (err < 0) {
508f8ccd 2252 module_put(type->owner);
d54725cd 2253 return err;
508f8ccd 2254 }
d54725cd 2255 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
508f8ccd
PNA		 2256 module_put(type->owner);
2257 return -EOPNOTSUPP;
2258 }
2259
2260 return 0;
2261}
2262
2263static void nft_chain_release_hook(struct nft_chain_hook *hook)
2264{
d54725cd
PNA		 2265 struct nft_hook *h, *next;
2266
2267 list_for_each_entry_safe(h, next, &hook->list, list) {
2268 list_del(&h->list);
2269 kfree(h);
2270 }
508f8ccd 2271 module_put(hook->type->owner);
508f8ccd
PNA		 2272}
2273
e38fbfa9 2274static void nft_last_rule(const struct nft_chain *chain, const void *ptr)
0cbc06b3 2275{
e38fbfa9
FW		 2276 struct nft_rule_dp_last *lrule;
2277
2278 BUILD_BUG_ON(offsetof(struct nft_rule_dp_last, end) != 0);
2c865a8a 2279
e38fbfa9
FW		 2280 lrule = (struct nft_rule_dp_last *)ptr;
2281 lrule->end.is_last = 1;
2282 lrule->chain = chain;
2c865a8a
PNA		 2283 /* blob size does not include the trailer rule */
2284}
2285
e38fbfa9
FW		 2286static struct nft_rule_blob *nf_tables_chain_alloc_rules(const struct nft_chain *chain,
2287 unsigned int size)
2c865a8a
PNA		 2288{
2289 struct nft_rule_blob *blob;
2290
2c865a8a 2291 if (size > INT_MAX)
0cbc06b3
FW		 2292 return NULL;
2293
e38fbfa9
FW		 2294 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rule_dp_last);
2295
33758c89 2296 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2c865a8a 2297 if (!blob)
0cbc06b3
FW		 2298 return NULL;
2299
2c865a8a 2300 blob->size = 0;
e38fbfa9 2301 nft_last_rule(chain, blob->data);
0cbc06b3 2302
2c865a8a 2303 return blob;
0cbc06b3
FW		 2304}
2305
d54725cd
PNA		 2306static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2307 const struct nft_chain_hook *hook,
2308 struct nft_chain *chain)
2309{
c5c6accd
FW		 2310 ops->pf = family;
2311 ops->hooknum = hook->num;
2312 ops->priority = hook->priority;
2313 ops->priv = chain;
2314 ops->hook = hook->type->hooks[ops->hooknum];
2315 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
d54725cd
PNA		 2316}
2317
2318static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2319 struct nft_chain_hook *hook, u32 flags)
2320{
2321 struct nft_chain *chain;
2322 struct nft_hook *h;
2323
2324 basechain->type = hook->type;
2325 INIT_LIST_HEAD(&basechain->hook_list);
2326 chain = &basechain->chain;
2327
d3519cb8 2328 if (nft_base_chain_netdev(family, hook->num)) {
d54725cd
PNA		 2329 list_splice_init(&hook->list, &basechain->hook_list);
2330 list_for_each_entry(h, &basechain->hook_list, list)
2331 nft_basechain_hook_init(&h->ops, family, hook, chain);
d54725cd 2332 }
b9703ed4 2333 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
d54725cd 2334
67c49de4 2335 chain->flags |= NFT_CHAIN_BASE | flags;
d54725cd
PNA		 2336 basechain->policy = NF_ACCEPT;
2337 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
77972a36
PNA		 2338 !nft_chain_offload_support(basechain)) {
2339 list_splice_init(&basechain->hook_list, &hook->list);
d54725cd 2340 return -EOPNOTSUPP;
77972a36 2341 }
d54725cd
PNA		 2342
2343 flow_block_init(&basechain->flow_block);
2344
2345 return 0;
2346}
2347
4bedf9ee 2348int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
04b7db41
PNA		 2349{
2350 int err;
2351
2352 err = rhltable_insert_key(&table->chains_ht, chain->name,
2353 &chain->rhlhead, nft_chain_ht_params);
2354 if (err)
2355 return err;
2356
2357 list_add_tail_rcu(&chain->list, &table->chains);
2358
2359 return 0;
2360}
2361
d0e2c7de
PNA		 2362static u64 chain_id;
2363
4035285f 2364static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
983c4fcb
PNA		 2365 u8 policy, u32 flags,
2366 struct netlink_ext_ack *extack)
4035285f
PNA		 2367{
2368 const struct nlattr * const *nla = ctx->nla;
2369 struct nft_table *table = ctx->table;
4035285f 2370 struct nft_base_chain *basechain;
4035285f 2371 struct net *net = ctx->net;
d0e2c7de 2372 char name[NFT_NAME_MAXLEN];
2c865a8a 2373 struct nft_rule_blob *blob;
66293c46 2374 struct nft_trans *trans;
4035285f 2375 struct nft_chain *chain;
4035285f
PNA		 2376 int err;
2377
2378 if (table->use == UINT_MAX)
2379 return -EOVERFLOW;
2380
2381 if (nla[NFTA_CHAIN_HOOK]) {
921ebde3 2382 struct nft_stats __percpu *stats = NULL;
b9703ed4 2383 struct nft_chain_hook hook = {};
4035285f 2384
d0e2c7de
PNA		 2385 if (flags & NFT_CHAIN_BINDING)
2386 return -EOPNOTSUPP;
2387
207296f1 2388 err = nft_chain_parse_hook(net, NULL, nla, &hook, family, flags,
b9703ed4 2389 extack);
4035285f
PNA		 2390 if (err < 0)
2391 return err;
2392
33758c89 2393 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2394 if (basechain == NULL) {
2395 nft_chain_release_hook(&hook);
2396 return -ENOMEM;
2397 }
d54725cd 2398 chain = &basechain->chain;
4035285f
PNA		 2399
2400 if (nla[NFTA_CHAIN_COUNTERS]) {
2401 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2402 if (IS_ERR(stats)) {
2403 nft_chain_release_hook(&hook);
2404 kfree(basechain);
2405 return PTR_ERR(stats);
2406 }
4c05ec47 2407 rcu_assign_pointer(basechain->stats, stats);
4035285f
PNA		 2408 }
2409
d54725cd
PNA		 2410 err = nft_basechain_init(basechain, family, &hook, flags);
2411 if (err < 0) {
2412 nft_chain_release_hook(&hook);
2413 kfree(basechain);
9a4d6dd5 2414 free_percpu(stats);
d54725cd
PNA		 2415 return err;
2416 }
921ebde3
TH		 2417 if (stats)
2418 static_branch_inc(&nft_counters_enabled);
4035285f 2419 } else {
d0e2c7de
PNA		 2420 if (flags & NFT_CHAIN_BASE)
2421 return -EINVAL;
2422 if (flags & NFT_CHAIN_HW_OFFLOAD)
2423 return -EOPNOTSUPP;
2424
33758c89 2425 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2426 if (chain == NULL)
2427 return -ENOMEM;
d0e2c7de
PNA		 2428
2429 chain->flags = flags;
4035285f 2430 }
43a605f2
PNA		 2431 ctx->chain = chain;
2432
4035285f
PNA		 2433 INIT_LIST_HEAD(&chain->rules);
2434 chain->handle = nf_tables_alloc_handle(table);
2435 chain->table = table;
d0e2c7de
PNA		 2436
2437 if (nla[NFTA_CHAIN_NAME]) {
33758c89 2438 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
d0e2c7de 2439 } else {
59136aa3
FW		 2440 if (!(flags & NFT_CHAIN_BINDING)) {
2441 err = -EINVAL;
002f2176 2442 goto err_destroy_chain;
59136aa3 2443 }
d0e2c7de
PNA		 2444
2445 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
33758c89 2446 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
d0e2c7de
PNA		 2447 }
2448
4035285f
PNA		 2449 if (!chain->name) {
2450 err = -ENOMEM;
002f2176
JGG		 2451 goto err_destroy_chain;
2452 }
2453
2454 if (nla[NFTA_CHAIN_USERDATA]) {
33758c89 2455 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
002f2176
JGG		 2456 if (chain->udata == NULL) {
2457 err = -ENOMEM;
2458 goto err_destroy_chain;
2459 }
2460 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
4035285f
PNA		 2461 }
2462
e38fbfa9 2463 blob = nf_tables_chain_alloc_rules(chain, 0);
2c865a8a 2464 if (!blob) {
0cbc06b3 2465 err = -ENOMEM;
002f2176 2466 goto err_destroy_chain;
0cbc06b3
FW		 2467 }
2468
2c865a8a
PNA		 2469 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2470 RCU_INIT_POINTER(chain->blob_gen_1, blob);
0cbc06b3 2471
c974a3a3 2472 err = nf_tables_register_hook(net, table, chain);
4035285f 2473 if (err < 0)
002f2176 2474 goto err_destroy_chain;
4035285f 2475
66293c46
FW		 2476 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2477 if (IS_ERR(trans)) {
2478 err = PTR_ERR(trans);
002f2176 2479 goto err_unregister_hook;
1b2470e5 2480 }
4035285f 2481
ad652f38 2482 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
66293c46
FW		 2483 if (nft_is_base_chain(chain))
2484 nft_trans_chain_policy(trans) = policy;
2485
04b7db41
PNA		 2486 err = nft_chain_add(table, chain);
2487 if (err < 0) {
2488 nft_trans_destroy(trans);
002f2176 2489 goto err_unregister_hook;
04b7db41
PNA		 2490 }
2491
4035285f 2492 table->use++;
4035285f
PNA		 2493
2494 return 0;
002f2176 2495err_unregister_hook:
c974a3a3 2496 nf_tables_unregister_hook(net, table, chain);
002f2176 2497err_destroy_chain:
43a605f2 2498 nf_tables_chain_destroy(ctx);
4035285f
PNA		 2499
2500 return err;
2501}
2502
c9626a2c 2503static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
98a381a7
PNA		 2504 u32 flags, const struct nlattr *attr,
2505 struct netlink_ext_ack *extack)
2c4a488a
PNA		 2506{
2507 const struct nlattr * const *nla = ctx->nla;
b9703ed4 2508 struct nft_base_chain *basechain = NULL;
2c4a488a
PNA		 2509 struct nft_table *table = ctx->table;
2510 struct nft_chain *chain = ctx->chain;
b9703ed4 2511 struct nft_chain_hook hook = {};
2c4a488a 2512 struct nft_stats *stats = NULL;
b9703ed4 2513 struct nft_hook *h, *next;
2c4a488a
PNA		 2514 struct nf_hook_ops *ops;
2515 struct nft_trans *trans;
b9703ed4 2516 bool unregister = false;
c974a3a3 2517 int err;
2c4a488a 2518
c9626a2c
PNA		 2519 if (chain->flags ^ flags)
2520 return -EOPNOTSUPP;
2521
b9703ed4
PNA		 2522 INIT_LIST_HEAD(&hook.list);
2523
2c4a488a 2524 if (nla[NFTA_CHAIN_HOOK]) {
98a381a7
PNA		 2525 if (!nft_is_base_chain(chain)) {
2526 NL_SET_BAD_ATTR(extack, attr);
77a92189 2527 return -EEXIST;
98a381a7 2528 }
b9703ed4
PNA		 2529
2530 basechain = nft_base_chain(chain);
2531 err = nft_chain_parse_hook(ctx->net, basechain, nla, &hook,
207296f1 2532 ctx->family, flags, extack);
2c4a488a
PNA		 2533 if (err < 0)
2534 return err;
2535
2c4a488a
PNA		 2536 if (basechain->type != hook.type) {
2537 nft_chain_release_hook(&hook);
98a381a7 2538 NL_SET_BAD_ATTR(extack, attr);
77a92189 2539 return -EEXIST;
2c4a488a
PNA		 2540 }
2541
b9703ed4
PNA		 2542 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2543 list_for_each_entry_safe(h, next, &hook.list, list) {
2544 h->ops.pf = basechain->ops.pf;
2545 h->ops.hooknum = basechain->ops.hooknum;
2546 h->ops.priority = basechain->ops.priority;
2547 h->ops.priv = basechain->ops.priv;
2548 h->ops.hook = basechain->ops.hook;
2549
2550 if (nft_hook_list_find(&basechain->hook_list, h)) {
2551 list_del(&h->list);
2552 kfree(h);
2553 }
d54725cd
PNA		 2554 }
2555 } else {
2556 ops = &basechain->ops;
2557 if (ops->hooknum != hook.num ||
2558 ops->priority != hook.priority) {
2559 nft_chain_release_hook(&hook);
98a381a7 2560 NL_SET_BAD_ATTR(extack, attr);
77a92189 2561 return -EEXIST;
d54725cd 2562 }
2c4a488a 2563 }
2c4a488a
PNA		 2564 }
2565
2566 if (nla[NFTA_CHAIN_HANDLE] &&
2567 nla[NFTA_CHAIN_NAME]) {
2568 struct nft_chain *chain2;
2569
f102d66b
FW		 2570 chain2 = nft_chain_lookup(ctx->net, table,
2571 nla[NFTA_CHAIN_NAME], genmask);
98a381a7
PNA		 2572 if (!IS_ERR(chain2)) {
2573 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
b9703ed4
PNA		 2574 err = -EEXIST;
2575 goto err_hooks;
98a381a7 2576 }
2c4a488a
PNA		 2577 }
2578
2579 if (nla[NFTA_CHAIN_COUNTERS]) {
b9703ed4
PNA		 2580 if (!nft_is_base_chain(chain)) {
2581 err = -EOPNOTSUPP;
2582 goto err_hooks;
2583 }
2c4a488a
PNA		 2584
2585 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
b9703ed4
PNA		 2586 if (IS_ERR(stats)) {
2587 err = PTR_ERR(stats);
2588 goto err_hooks;
2589 }
2c4a488a
PNA		 2590 }
2591
b9703ed4
PNA		 2592 if (!(table->flags & NFT_TABLE_F_DORMANT) &&
2593 nft_is_base_chain(chain) &&
2594 !list_empty(&hook.list)) {
2595 basechain = nft_base_chain(chain);
2596 ops = &basechain->ops;
2597
2598 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {
2599 err = nft_netdev_register_hooks(ctx->net, &hook.list);
2600 if (err < 0)
2601 goto err_hooks;
2602 }
2603 }
2604
2605 unregister = true;
c6cc94df 2606 err = -ENOMEM;
2c4a488a
PNA		 2607 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2608 sizeof(struct nft_trans_chain));
c6cc94df 2609 if (trans == NULL)
b9703ed4 2610 goto err_trans;
2c4a488a
PNA		 2611
2612 nft_trans_chain_stats(trans) = stats;
2613 nft_trans_chain_update(trans) = true;
2614
2615 if (nla[NFTA_CHAIN_POLICY])
2616 nft_trans_chain_policy(trans) = policy;
2617 else
2618 nft_trans_chain_policy(trans) = -1;
2619
c6cc94df
FW		 2620 if (nla[NFTA_CHAIN_HANDLE] &&
2621 nla[NFTA_CHAIN_NAME]) {
d59d2f82 2622 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c6cc94df
FW		 2623 struct nft_trans *tmp;
2624 char *name;
2625
2626 err = -ENOMEM;
33758c89 2627 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
c6cc94df 2628 if (!name)
b9703ed4 2629 goto err_trans;
c6cc94df
FW		 2630
2631 err = -EEXIST;
0854db2a 2632 list_for_each_entry(tmp, &nft_net->commit_list, list) {
c6cc94df
FW		 2633 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2634 tmp->ctx.table == table &&
2635 nft_trans_chain_update(tmp) &&
2636 nft_trans_chain_name(tmp) &&
2637 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
98a381a7 2638 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
c6cc94df 2639 kfree(name);
b9703ed4 2640 goto err_trans;
c6cc94df 2641 }
2c4a488a 2642 }
c6cc94df
FW		 2643
2644 nft_trans_chain_name(trans) = name;
2c4a488a 2645 }
b9703ed4
PNA		 2646
2647 nft_trans_basechain(trans) = basechain;
2648 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2649 list_splice(&hook.list, &nft_trans_chain_hooks(trans));
2650
0854db2a 2651 nft_trans_commit_list_add_tail(ctx->net, trans);
2c4a488a
PNA		 2652
2653 return 0;
b9703ed4
PNA		 2654
2655err_trans:
c6cc94df
FW		 2656 free_percpu(stats);
2657 kfree(trans);
b9703ed4
PNA		 2658err_hooks:
2659 if (nla[NFTA_CHAIN_HOOK]) {
2660 list_for_each_entry_safe(h, next, &hook.list, list) {
2661 if (unregister)
2662 nf_unregister_net_hook(ctx->net, &h->ops);
2663 list_del(&h->list);
2664 kfree_rcu(h, rcu);
2665 }
2666 module_put(hook.type->owner);
2667 }
2668
c6cc94df 2669 return err;
2c4a488a
PNA		 2670}
2671
837830a4 2672static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
95f466d2 2673 const struct nft_table *table,
837830a4
PNA		 2674 const struct nlattr *nla)
2675{
d59d2f82 2676 struct nftables_pernet *nft_net = nft_pernet(net);
837830a4
PNA		 2677 u32 id = ntohl(nla_get_be32(nla));
2678 struct nft_trans *trans;
2679
0854db2a 2680 list_for_each_entry(trans, &nft_net->commit_list, list) {
837830a4
PNA		 2681 struct nft_chain *chain = trans->ctx.chain;
2682
2683 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
95f466d2 2684 chain->table == table &&
837830a4
PNA		 2685 id == nft_trans_chain_id(trans))
2686 return chain;
2687 }
2688 return ERR_PTR(-ENOENT);
2689}
2690
7dab8ee3
PNA		 2691static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2692 const struct nlattr * const nla[])
96518518 2693{
7dab8ee3 2694 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 2695 struct netlink_ext_ack *extack = info->extack;
2696 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2697 u8 family = info->nfmsg->nfgen_family;
74cccc3d 2698 struct nft_chain *chain = NULL;
7dab8ee3 2699 struct net *net = info->net;
36dd1bcc 2700 const struct nlattr *attr;
96518518 2701 struct nft_table *table;
57de2a0c 2702 u8 policy = NF_ACCEPT;
4035285f 2703 struct nft_ctx ctx;
96518518 2704 u64 handle = 0;
c9626a2c 2705 u32 flags = 0;
96518518 2706
0854db2a 2707 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 2708
6001a930
PNA		 2709 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2710 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2711 if (IS_ERR(table)) {
2712 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2713 return PTR_ERR(table);
36dd1bcc 2714 }
96518518 2715
96518518 2716 chain = NULL;
36dd1bcc 2717 attr = nla[NFTA_CHAIN_NAME];
96518518
PM		 2718
2719 if (nla[NFTA_CHAIN_HANDLE]) {
2720 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
cac20fcd 2721 chain = nft_chain_lookup_byhandle(table, handle, genmask);
36dd1bcc
PNA		 2722 if (IS_ERR(chain)) {
2723 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
96518518 2724 return PTR_ERR(chain);
36dd1bcc
PNA		 2725 }
2726 attr = nla[NFTA_CHAIN_HANDLE];
74cccc3d 2727 } else if (nla[NFTA_CHAIN_NAME]) {
f102d66b 2728 chain = nft_chain_lookup(net, table, attr, genmask);
96518518 2729 if (IS_ERR(chain)) {
36dd1bcc
PNA		 2730 if (PTR_ERR(chain) != -ENOENT) {
2731 NL_SET_BAD_ATTR(extack, attr);
96518518 2732 return PTR_ERR(chain);
36dd1bcc 2733 }
96518518
PM		 2734 chain = NULL;
2735 }
74cccc3d
PNA		 2736 } else if (!nla[NFTA_CHAIN_ID]) {
2737 return -EINVAL;
96518518
PM		 2738 }
2739
57de2a0c 2740 if (nla[NFTA_CHAIN_POLICY]) {
f323d954 2741 if (chain != NULL &&
36dd1bcc
PNA		 2742 !nft_is_base_chain(chain)) {
2743 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
d6b6cb1d 2744 return -EOPNOTSUPP;
36dd1bcc 2745 }
d6b6cb1d
PNA		 2746
2747 if (chain == NULL &&
36dd1bcc
PNA		 2748 nla[NFTA_CHAIN_HOOK] == NULL) {
2749 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
57de2a0c 2750 return -EOPNOTSUPP;
36dd1bcc 2751 }
57de2a0c 2752
8f46df18 2753 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
57de2a0c
PM		 2754 switch (policy) {
2755 case NF_DROP:
2756 case NF_ACCEPT:
2757 break;
2758 default:
2759 return -EINVAL;
2760 }
2761 }
2762
c9626a2c
PNA		 2763 if (nla[NFTA_CHAIN_FLAGS])
2764 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
b717273d
FW		 2765 else if (chain)
2766 flags = chain->flags;
c9626a2c 2767
c1f79a2e
PNA		 2768 if (flags & ~NFT_CHAIN_FLAGS)
2769 return -EOPNOTSUPP;
2770
7dab8ee3 2771 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4035285f 2772
96518518 2773 if (chain != NULL) {
5dc52d83
PNA		 2774 if (chain->flags & NFT_CHAIN_BINDING)
2775 return -EINVAL;
2776
7dab8ee3 2777 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 2778 NL_SET_BAD_ATTR(extack, attr);
96518518 2779 return -EEXIST;
36dd1bcc 2780 }
7dab8ee3 2781 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 2782 return -EOPNOTSUPP;
2783
67c49de4 2784 flags |= chain->flags & NFT_CHAIN_BASE;
98a381a7
PNA		 2785 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2786 extack);
96518518
PM		 2787 }
2788
983c4fcb 2789 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
96518518
PM		 2790}
2791
7d937b10
PNA		 2792static int nft_delchain_hook(struct nft_ctx *ctx, struct nft_chain *chain,
2793 struct netlink_ext_ack *extack)
2794{
2795 const struct nlattr * const *nla = ctx->nla;
2796 struct nft_chain_hook chain_hook = {};
2797 struct nft_base_chain *basechain;
2798 struct nft_hook *this, *hook;
2799 LIST_HEAD(chain_del_list);
2800 struct nft_trans *trans;
2801 int err;
2802
2803 if (!nft_is_base_chain(chain))
2804 return -EOPNOTSUPP;
2805
2806 basechain = nft_base_chain(chain);
2807 err = nft_chain_parse_hook(ctx->net, basechain, nla, &chain_hook,
207296f1 2808 ctx->family, chain->flags, extack);
7d937b10
PNA		 2809 if (err < 0)
2810 return err;
2811
2812 list_for_each_entry(this, &chain_hook.list, list) {
2813 hook = nft_hook_list_find(&basechain->hook_list, this);
2814 if (!hook) {
2815 err = -ENOENT;
2816 goto err_chain_del_hook;
2817 }
2818 list_move(&hook->list, &chain_del_list);
2819 }
2820
2821 trans = nft_trans_alloc(ctx, NFT_MSG_DELCHAIN,
2822 sizeof(struct nft_trans_chain));
2823 if (!trans) {
2824 err = -ENOMEM;
2825 goto err_chain_del_hook;
2826 }
2827
2828 nft_trans_basechain(trans) = basechain;
2829 nft_trans_chain_update(trans) = true;
2830 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2831 list_splice(&chain_del_list, &nft_trans_chain_hooks(trans));
2832 nft_chain_release_hook(&chain_hook);
2833
2834 nft_trans_commit_list_add_tail(ctx->net, trans);
2835
2836 return 0;
2837
2838err_chain_del_hook:
2839 list_splice(&chain_del_list, &basechain->hook_list);
2840 nft_chain_release_hook(&chain_hook);
2841
2842 return err;
2843}
2844
7dab8ee3
PNA		 2845static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2846 const struct nlattr * const nla[])
96518518 2847{
7dab8ee3
PNA		 2848 struct netlink_ext_ack *extack = info->extack;
2849 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2850 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 2851 struct net *net = info->net;
36dd1bcc 2852 const struct nlattr *attr;
96518518
PM		 2853 struct nft_table *table;
2854 struct nft_chain *chain;
9dee1474 2855 struct nft_rule *rule;
91c7b38d 2856 struct nft_ctx ctx;
3ecbfd65 2857 u64 handle;
9dee1474
PNA		 2858 u32 use;
2859 int err;
96518518 2860
6001a930
PNA		 2861 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2862 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2863 if (IS_ERR(table)) {
2864 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2865 return PTR_ERR(table);
36dd1bcc 2866 }
96518518 2867
3ecbfd65 2868 if (nla[NFTA_CHAIN_HANDLE]) {
36dd1bcc
PNA		 2869 attr = nla[NFTA_CHAIN_HANDLE];
2870 handle = be64_to_cpu(nla_get_be64(attr));
cac20fcd 2871 chain = nft_chain_lookup_byhandle(table, handle, genmask);
3ecbfd65 2872 } else {
36dd1bcc 2873 attr = nla[NFTA_CHAIN_NAME];
f102d66b 2874 chain = nft_chain_lookup(net, table, attr, genmask);
3ecbfd65 2875 }
36dd1bcc 2876 if (IS_ERR(chain)) {
f80a612d
FFM		 2877 if (PTR_ERR(chain) == -ENOENT &&
2878 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
2879 return 0;
2880
36dd1bcc 2881 NL_SET_BAD_ATTR(extack, attr);
96518518 2882 return PTR_ERR(chain);
36dd1bcc 2883 }
9dee1474 2884
7d937b10
PNA		 2885 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2886
2887 if (nla[NFTA_CHAIN_HOOK]) {
2888 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2889 return -EOPNOTSUPP;
2890
2891 return nft_delchain_hook(&ctx, chain, extack);
2892 }
2893
7dab8ee3 2894 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
9dee1474 2895 chain->use > 0)
96518518
PM		 2896 return -EBUSY;
2897
9dee1474
PNA		 2898 use = chain->use;
2899 list_for_each_entry(rule, &chain->rules, list) {
2900 if (!nft_is_active_next(net, rule))
2901 continue;
2902 use--;
2903
2904 err = nft_delrule(&ctx, rule);
2905 if (err < 0)
2906 return err;
2907 }
2908
2909 /* There are rules and elements that are still holding references to us,
2910 * we cannot do a recursive removal in this case.
2911 */
36dd1bcc
PNA		 2912 if (use > 0) {
2913 NL_SET_BAD_ATTR(extack, attr);
9dee1474 2914 return -EBUSY;
36dd1bcc 2915 }
9dee1474 2916
ee01d542 2917 return nft_delchain(&ctx);
96518518
PM		 2918}
2919
96518518
PM		 2920/*
2921 * Expressions
2922 */
2923
2924/**
ef1f7df9 2925 * nft_register_expr - register nf_tables expr type
3db86c39 2926 * @type: expr type
96518518 2927 *
ef1f7df9 2928 * Registers the expr type for use with nf_tables. Returns zero on
96518518
PM		 2929 * success or a negative errno code otherwise.
2930 */
ef1f7df9 2931int nft_register_expr(struct nft_expr_type *type)
96518518
PM		 2932{
2933 nfnl_lock(NFNL_SUBSYS_NFTABLES);
758dbcec 2934 if (type->family == NFPROTO_UNSPEC)
e688a7f8 2935 list_add_tail_rcu(&type->list, &nf_tables_expressions);
758dbcec 2936 else
e688a7f8 2937 list_add_rcu(&type->list, &nf_tables_expressions);
96518518
PM		 2938 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2939 return 0;
2940}
2941EXPORT_SYMBOL_GPL(nft_register_expr);
2942
2943/**
ef1f7df9 2944 * nft_unregister_expr - unregister nf_tables expr type
3db86c39 2945 * @type: expr type
96518518 2946 *
ef1f7df9 2947 * Unregisters the expr typefor use with nf_tables.
96518518 2948 */
ef1f7df9 2949void nft_unregister_expr(struct nft_expr_type *type)
96518518
PM		 2950{
2951 nfnl_lock(NFNL_SUBSYS_NFTABLES);
e688a7f8 2952 list_del_rcu(&type->list);
96518518
PM		 2953 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2954}
2955EXPORT_SYMBOL_GPL(nft_unregister_expr);
2956
64d46806
PM		 2957static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2958 struct nlattr *nla)
96518518 2959{
9cff126f 2960 const struct nft_expr_type *type, *candidate = NULL;
96518518 2961
ef1f7df9 2962 list_for_each_entry(type, &nf_tables_expressions, list) {
9cff126f
PNA		 2963 if (!nla_strcmp(nla, type->name)) {
2964 if (!type->family && !candidate)
2965 candidate = type;
2966 else if (type->family == family)
2967 candidate = type;
2968 }
96518518 2969 }
9cff126f 2970 return candidate;
96518518
PM		 2971}
2972
b9c04ae7
PNA		 2973#ifdef CONFIG_MODULES
2974static int nft_expr_type_request_module(struct net *net, u8 family,
2975 struct nlattr *nla)
2976{
eb014de4
PNA		 2977 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
2978 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
b9c04ae7
PNA		 2979 return -EAGAIN;
2980
2981 return 0;
2982}
2983#endif
2984
452238e8
FW		 2985static const struct nft_expr_type *nft_expr_type_get(struct net *net,
2986 u8 family,
64d46806 2987 struct nlattr *nla)
96518518 2988{
ef1f7df9 2989 const struct nft_expr_type *type;
96518518
PM		 2990
2991 if (nla == NULL)
2992 return ERR_PTR(-EINVAL);
2993
64d46806 2994 type = __nft_expr_type_get(family, nla);
ef1f7df9
PM		 2995 if (type != NULL && try_module_get(type->owner))
2996 return type;
96518518 2997
f102d66b 2998 lockdep_nfnl_nft_mutex_not_held();
96518518 2999#ifdef CONFIG_MODULES
ef1f7df9 3000 if (type == NULL) {
b9c04ae7 3001 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
64d46806
PM		 3002 return ERR_PTR(-EAGAIN);
3003
eb014de4
PNA		 3004 if (nft_request_module(net, "nft-expr-%.*s",
3005 nla_len(nla),
3006 (char *)nla_data(nla)) == -EAGAIN)
96518518
PM		 3007 return ERR_PTR(-EAGAIN);
3008 }
3009#endif
3010 return ERR_PTR(-ENOENT);
3011}
3012
3013static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
9332d27d
FW		 3014 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
3015 .len = NFT_MODULE_AUTOLOAD_LIMIT },
96518518
PM		 3016 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
3017};
3018
3019static int nf_tables_fill_expr_info(struct sk_buff *skb,
8daa8fde 3020 const struct nft_expr *expr, bool reset)
96518518 3021{
ef1f7df9 3022 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
96518518
PM		 3023 goto nla_put_failure;
3024
3025 if (expr->ops->dump) {
ae0be8de
MK		 3026 struct nlattr *data = nla_nest_start_noflag(skb,
3027 NFTA_EXPR_DATA);
96518518
PM		 3028 if (data == NULL)
3029 goto nla_put_failure;
8daa8fde 3030 if (expr->ops->dump(skb, expr, reset) < 0)
96518518
PM		 3031 goto nla_put_failure;
3032 nla_nest_end(skb, data);
3033 }
3034
3035 return skb->len;
3036
3037nla_put_failure:
3038 return -1;
3039};
3040
0b2d8a7b 3041int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
8daa8fde 3042 const struct nft_expr *expr, bool reset)
0b2d8a7b
PM		 3043{
3044 struct nlattr *nest;
3045
ae0be8de 3046 nest = nla_nest_start_noflag(skb, attr);
0b2d8a7b
PM		 3047 if (!nest)
3048 goto nla_put_failure;
8daa8fde 3049 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
0b2d8a7b
PM		 3050 goto nla_put_failure;
3051 nla_nest_end(skb, nest);
3052 return 0;
3053
3054nla_put_failure:
3055 return -1;
3056}
3057
96518518
PM		 3058struct nft_expr_info {
3059 const struct nft_expr_ops *ops;
83d9dcba 3060 const struct nlattr *attr;
ef1f7df9 3061 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
96518518
PM		 3062};
3063
0ca743a5
PNA		 3064static int nf_tables_expr_parse(const struct nft_ctx *ctx,
3065 const struct nlattr *nla,
96518518
PM		 3066 struct nft_expr_info *info)
3067{
ef1f7df9 3068 const struct nft_expr_type *type;
96518518 3069 const struct nft_expr_ops *ops;
ef1f7df9 3070 struct nlattr *tb[NFTA_EXPR_MAX + 1];
96518518
PM		 3071 int err;
3072
8cb08174
JB		 3073 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3074 nft_expr_policy, NULL);
96518518
PM		 3075 if (err < 0)
3076 return err;
3077
452238e8 3078 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
ef1f7df9
PM		 3079 if (IS_ERR(type))
3080 return PTR_ERR(type);
3081
3082 if (tb[NFTA_EXPR_DATA]) {
8cb08174
JB		 3083 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3084 tb[NFTA_EXPR_DATA],
3085 type->policy, NULL);
ef1f7df9
PM		 3086 if (err < 0)
3087 goto err1;
3088 } else
3089 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
3090
3091 if (type->select_ops != NULL) {
0ca743a5
PNA		 3092 ops = type->select_ops(ctx,
3093 (const struct nlattr * const *)info->tb);
ef1f7df9
PM		 3094 if (IS_ERR(ops)) {
3095 err = PTR_ERR(ops);
0ef1efd1
PNA		 3096#ifdef CONFIG_MODULES
3097 if (err == -EAGAIN)
eb014de4
PNA		 3098 if (nft_expr_type_request_module(ctx->net,
3099 ctx->family,
3100 tb[NFTA_EXPR_NAME]) != -EAGAIN)
3101 err = -ENOENT;
0ef1efd1 3102#endif
ef1f7df9
PM		 3103 goto err1;
3104 }
3105 } else
3106 ops = type->ops;
3107
83d9dcba 3108 info->attr = nla;
96518518 3109 info->ops = ops;
83d9dcba 3110
96518518 3111 return 0;
ef1f7df9
PM		 3112
3113err1:
3114 module_put(type->owner);
3115 return err;
96518518
PM		 3116}
3117
3a07327d
PNA		 3118int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
3119 struct nft_expr_info *info)
3120{
3121 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3122 const struct nft_expr_type *type;
3123 int err;
3124
3125 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3126 nft_expr_policy, NULL);
3127 if (err < 0)
3128 return err;
3129
3130 if (!tb[NFTA_EXPR_DATA])
3131 return -EINVAL;
3132
3133 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
98cbc40e
DC		 3134 if (!type)
3135 return -ENOENT;
3a07327d
PNA		 3136
3137 if (!type->inner_ops)
3138 return -EOPNOTSUPP;
3139
3140 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3141 tb[NFTA_EXPR_DATA],
3142 type->policy, NULL);
3143 if (err < 0)
3144 goto err_nla_parse;
3145
3146 info->attr = nla;
3147 info->ops = type->inner_ops;
3148
3149 return 0;
3150
3151err_nla_parse:
3152 return err;
3153}
3154
96518518 3155static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 3156 const struct nft_expr_info *expr_info,
96518518
PM		 3157 struct nft_expr *expr)
3158{
7dab8ee3 3159 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 3160 int err;
3161
3162 expr->ops = ops;
3163 if (ops->init) {
7dab8ee3 3164 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 3165 if (err < 0)
3166 goto err1;
3167 }
3168
96518518 3169 return 0;
96518518
PM		 3170err1:
3171 expr->ops = NULL;
3172 return err;
3173}
3174
62472bce
PM		 3175static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
3176 struct nft_expr *expr)
96518518 3177{
3f3a390d
PNA		 3178 const struct nft_expr_type *type = expr->ops->type;
3179
96518518 3180 if (expr->ops->destroy)
62472bce 3181 expr->ops->destroy(ctx, expr);
3f3a390d 3182 module_put(type->owner);
96518518
PM		 3183}
3184
795a6d6b
PNA		 3185static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
3186 const struct nlattr *nla)
0b2d8a7b 3187{
7dab8ee3 3188 struct nft_expr_info expr_info;
0b2d8a7b 3189 struct nft_expr *expr;
b8e20400 3190 struct module *owner;
0b2d8a7b
PM		 3191 int err;
3192
7dab8ee3 3193 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 3194 if (err < 0)
52077804
PNA		 3195 goto err_expr_parse;
3196
3197 err = -EOPNOTSUPP;
3198 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
3199 goto err_expr_stateful;
0b2d8a7b
PM		 3200
3201 err = -ENOMEM;
33758c89 3202 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 3203 if (expr == NULL)
52077804 3204 goto err_expr_stateful;
0b2d8a7b 3205
7dab8ee3 3206 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 3207 if (err < 0)
52077804 3208 goto err_expr_new;
0b2d8a7b
PM		 3209
3210 return expr;
52077804 3211err_expr_new:
6cafaf47 3212 kfree(expr);
52077804 3213err_expr_stateful:
7dab8ee3
PNA		 3214 owner = expr_info.ops->type->owner;
3215 if (expr_info.ops->type->release_ops)
3216 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 3217
3218 module_put(owner);
52077804 3219err_expr_parse:
0b2d8a7b
PM		 3220 return ERR_PTR(err);
3221}
3222
c604cc69
PNA		 3223int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
3224{
3225 int err;
3226
3227 if (src->ops->clone) {
3228 dst->ops = src->ops;
3229 err = src->ops->clone(dst, src);
3230 if (err < 0)
3231 return err;
3232 } else {
3233 memcpy(dst, src, src->ops->size);
3234 }
3235
3236 __module_get(src->ops->type->owner);
3237
3238 return 0;
3239}
3240
0b2d8a7b
PM		 3241void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
3242{
3243 nf_tables_expr_destroy(ctx, expr);
3244 kfree(expr);
3245}
3246
96518518
PM		 3247/*
3248 * Rules
3249 */
3250
cac20fcd
PNA		 3251static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
3252 u64 handle)
96518518
PM		 3253{
3254 struct nft_rule *rule;
3255
3256 // FIXME: this sucks
d9adf22a 3257 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 3258 if (handle == rule->handle)
3259 return rule;
3260 }
3261
3262 return ERR_PTR(-ENOENT);
3263}
3264
cac20fcd
PNA		 3265static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3266 const struct nlattr *nla)
96518518
PM		 3267{
3268 if (nla == NULL)
3269 return ERR_PTR(-EINVAL);
3270
cac20fcd 3271 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 3272}
3273
3274static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 3275 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3276 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 3277 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3278 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3279 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
3280 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
0ca743a5 3281 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 3282 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 3283 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3284 .len = NFT_USERDATA_MAXLEN },
467697d2 3285 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 3286 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 3287 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 3288};
3289
84d7fce6
PNA		 3290static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3291 u32 portid, u32 seq, int event,
3292 u32 flags, int family,
96518518
PM		 3293 const struct nft_table *table,
3294 const struct nft_chain *chain,
8daa8fde
PS		 3295 const struct nft_rule *rule, u64 handle,
3296 bool reset)
96518518
PM		 3297{
3298 struct nlmsghdr *nlh;
96518518
PM		 3299 const struct nft_expr *expr, *next;
3300 struct nlattr *list;
dedb67c4 3301 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3302
19c28b13
PNA		 3303 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3304 nft_base_seq(net));
3305 if (!nlh)
96518518
PM		 3306 goto nla_put_failure;
3307
96518518
PM		 3308 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3309 goto nla_put_failure;
3310 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3311 goto nla_put_failure;
b46f6ded
ND		 3312 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3313 NFTA_RULE_PAD))
96518518
PM		 3314 goto nla_put_failure;
3315
e189ae16
PNA		 3316 if (event != NFT_MSG_DELRULE && handle) {
3317 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3318 NFTA_RULE_PAD))
5e948466
EL		 3319 goto nla_put_failure;
3320 }
3321
b72920f6
PNA		 3322 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3323 nft_flow_rule_stats(chain, rule);
3324
ae0be8de 3325 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3326 if (list == NULL)
3327 goto nla_put_failure;
3328 nft_rule_for_each_expr(expr, next, rule) {
8daa8fde 3329 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
96518518 3330 goto nla_put_failure;
96518518
PM		 3331 }
3332 nla_nest_end(skb, list);
3333
86f1ec32
PM		 3334 if (rule->udata) {
3335 struct nft_userdata *udata = nft_userdata(rule);
3336 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3337 udata->data) < 0)
3338 goto nla_put_failure;
3339 }
0768b3b3 3340
053c095a
JB		 3341 nlmsg_end(skb, nlh);
3342 return 0;
96518518
PM		 3343
3344nla_put_failure:
3345 nlmsg_trim(skb, nlh);
3346 return -1;
3347}
3348
25e94a99
PNA		 3349static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3350 const struct nft_rule *rule, int event)
96518518 3351{
d59d2f82 3352 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3353 const struct nft_rule *prule;
96518518 3354 struct sk_buff *skb;
e189ae16
PNA		 3355 u64 handle = 0;
3356 u16 flags = 0;
96518518
PM		 3357 int err;
3358
128ad332
PNA		 3359 if (!ctx->report &&
3360 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3361 return;
96518518 3362
96518518
PM		 3363 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3364 if (skb == NULL)
3365 goto err;
3366
e189ae16
PNA		 3367 if (event == NFT_MSG_NEWRULE &&
3368 !list_is_first(&rule->list, &ctx->chain->rules) &&
3369 !list_is_last(&rule->list, &ctx->chain->rules)) {
3370 prule = list_prev_entry(rule, list);
3371 handle = prule->handle;
3372 }
3373 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3374 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3375 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3376 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3377
84d7fce6 3378 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16 3379 event, flags, ctx->family, ctx->table,
8daa8fde 3380 ctx->chain, rule, handle, false);
96518518
PM		 3381 if (err < 0) {
3382 kfree_skb(skb);
3383 goto err;
3384 }
3385
0854db2a 3386 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3387 return;
96518518 3388err:
25e94a99 3389 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3390}
3391
6e1f760e 3392struct nft_rule_dump_ctx {
e46abbcc 3393 char *table;
b7263e07 3394 char *chain;
6e1f760e
PNA		 3395};
3396
241faece
PS		 3397static int __nf_tables_dump_rules(struct sk_buff *skb,
3398 unsigned int *idx,
3399 struct netlink_callback *cb,
3400 const struct nft_table *table,
8daa8fde
PS		 3401 const struct nft_chain *chain,
3402 bool reset)
241faece
PS		 3403{
3404 struct net *net = sock_net(skb->sk);
2c82c7e7 3405 const struct nft_rule *rule, *prule;
241faece 3406 unsigned int s_idx = cb->args[0];
e189ae16 3407 u64 handle;
241faece 3408
2c82c7e7 3409 prule = NULL;
241faece
PS		 3410 list_for_each_entry_rcu(rule, &chain->rules, list) {
3411 if (!nft_is_active(net, rule))
2c82c7e7 3412 goto cont_skip;
241faece
PS		 3413 if (*idx < s_idx)
3414 goto cont;
3415 if (*idx > s_idx) {
3416 memset(&cb->args[1], 0,
3417 sizeof(cb->args) - sizeof(cb->args[0]));
3418 }
e189ae16
PNA		 3419 if (prule)
3420 handle = prule->handle;
3421 else
3422 handle = 0;
3423
241faece
PS		 3424 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3425 cb->nlh->nlmsg_seq,
3426 NFT_MSG_NEWRULE,
3427 NLM_F_MULTI | NLM_F_APPEND,
3428 table->family,
8daa8fde 3429 table, chain, rule, handle, reset) < 0)
310529e6 3430 return 1;
241faece
PS		 3431
3432 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3433cont:
2c82c7e7
FW		 3434 prule = rule;
3435cont_skip:
241faece
PS		 3436 (*idx)++;
3437 }
310529e6 3438 return 0;
241faece
PS		 3439}
3440
96518518
PM		 3441static int nf_tables_dump_rules(struct sk_buff *skb,
3442 struct netlink_callback *cb)
3443{
3444 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6e1f760e 3445 const struct nft_rule_dump_ctx *ctx = cb->data;
241faece 3446 struct nft_table *table;
96518518 3447 const struct nft_chain *chain;
241faece 3448 unsigned int idx = 0;
99633ab2 3449 struct net *net = sock_net(skb->sk);
96518518 3450 int family = nfmsg->nfgen_family;
0854db2a 3451 struct nftables_pernet *nft_net;
8daa8fde
PS		 3452 bool reset = false;
3453
3454 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3455 reset = true;
96518518 3456
e688a7f8 3457 rcu_read_lock();
d59d2f82 3458 nft_net = nft_pernet(net);
34002783 3459 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3460
0854db2a 3461 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3462 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3463 continue;
3464
3465 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3466 continue;
3467
715849ab 3468 if (ctx && ctx->table && ctx->chain) {
241faece 3469 struct rhlist_head *list, *tmp;
6e1f760e 3470
241faece
PS		 3471 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3472 nft_chain_ht_params);
3473 if (!list)
3474 goto done;
3475
3476 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3477 if (!nft_is_active(net, chain))
3478 continue;
3479 __nf_tables_dump_rules(skb, &idx,
8daa8fde 3480 cb, table, chain, reset);
241faece 3481 break;
96518518 3482 }
241faece 3483 goto done;
96518518 3484 }
241faece
PS		 3485
3486 list_for_each_entry_rcu(chain, &table->chains, list) {
8daa8fde
PS		 3487 if (__nf_tables_dump_rules(skb, &idx,
3488 cb, table, chain, reset))
241faece
PS		 3489 goto done;
3490 }
3491
3492 if (ctx && ctx->table)
3493 break;
96518518
PM		 3494 }
3495done:
e688a7f8 3496 rcu_read_unlock();
310529e6
PS		 3497
3498 cb->args[0] = idx;
96518518
PM		 3499 return skb->len;
3500}
3501
90fd131a
FW		 3502static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3503{
3504 const struct nlattr * const *nla = cb->data;
3505 struct nft_rule_dump_ctx *ctx = NULL;
3506
3507 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3508 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3509 if (!ctx)
3510 return -ENOMEM;
3511
3512 if (nla[NFTA_RULE_TABLE]) {
3513 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3514 GFP_ATOMIC);
3515 if (!ctx->table) {
3516 kfree(ctx);
3517 return -ENOMEM;
3518 }
3519 }
3520 if (nla[NFTA_RULE_CHAIN]) {
3521 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3522 GFP_ATOMIC);
3523 if (!ctx->chain) {
3524 kfree(ctx->table);
3525 kfree(ctx);
3526 return -ENOMEM;
3527 }
3528 }
3529 }
3530
3531 cb->data = ctx;
3532 return 0;
3533}
3534
6e1f760e
PNA		 3535static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3536{
e46abbcc
PS		 3537 struct nft_rule_dump_ctx *ctx = cb->data;
3538
3539 if (ctx) {
3540 kfree(ctx->table);
b7263e07 3541 kfree(ctx->chain);
e46abbcc
PS		 3542 kfree(ctx);
3543 }
6e1f760e
PNA		 3544 return 0;
3545}
3546
d9adf22a 3547/* called with rcu_read_lock held */
797d4980
PNA		 3548static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3549 const struct nlattr * const nla[])
96518518 3550{
797d4980
PNA		 3551 struct netlink_ext_ack *extack = info->extack;
3552 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3553 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3554 const struct nft_chain *chain;
3555 const struct nft_rule *rule;
797d4980 3556 struct net *net = info->net;
1b2470e5 3557 struct nft_table *table;
96518518 3558 struct sk_buff *skb2;
8daa8fde 3559 bool reset = false;
96518518
PM		 3560 int err;
3561
797d4980 3562 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518 3563 struct netlink_dump_control c = {
90fd131a 3564 .start= nf_tables_dump_rules_start,
96518518 3565 .dump = nf_tables_dump_rules,
6e1f760e 3566 .done = nf_tables_dump_rules_done,
d9adf22a 3567 .module = THIS_MODULE,
90fd131a 3568 .data = (void *)nla,
96518518 3569 };
6e1f760e 3570
797d4980 3571 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 3572 }
3573
6001a930 3574 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3575 if (IS_ERR(table)) {
3576 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3577 return PTR_ERR(table);
36dd1bcc 3578 }
96518518 3579
f102d66b 3580 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3581 if (IS_ERR(chain)) {
3582 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
96518518 3583 return PTR_ERR(chain);
36dd1bcc 3584 }
96518518 3585
cac20fcd 3586 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3587 if (IS_ERR(rule)) {
3588 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3589 return PTR_ERR(rule);
36dd1bcc 3590 }
96518518 3591
d9adf22a 3592 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 3593 if (!skb2)
3594 return -ENOMEM;
3595
8daa8fde
PS		 3596 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3597 reset = true;
3598
84d7fce6 3599 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 3600 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
8daa8fde 3601 family, table, chain, rule, 0, reset);
96518518 3602 if (err < 0)
ee921183 3603 goto err_fill_rule_info;
96518518 3604
ee921183 3605 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 3606
ee921183 3607err_fill_rule_info:
96518518
PM		 3608 kfree_skb(skb2);
3609 return err;
3610}
3611
4bedf9ee 3612void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule)
96518518 3613{
29e38801 3614 struct nft_expr *expr, *next;
96518518
PM		 3615
3616 /*
3617 * Careful: some expressions might not be initialized in case this
3618 * is called on error from nf_tables_newrule().
3619 */
3620 expr = nft_expr_first(rule);
31cc578a 3621 while (nft_expr_more(rule, expr)) {
29e38801 3622 next = nft_expr_next(expr);
62472bce 3623 nf_tables_expr_destroy(ctx, expr);
29e38801 3624 expr = next;
96518518
PM		 3625 }
3626 kfree(rule);
3627}
3628
4bedf9ee 3629static void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3630{
f6ac8585 3631 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3632 nf_tables_rule_destroy(ctx, rule);
3633}
3634
a654de8f
PNA		 3635int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3636{
3637 struct nft_expr *expr, *last;
3638 const struct nft_data *data;
3639 struct nft_rule *rule;
3640 int err;
3641
26b2f552
TY		 3642 if (ctx->level == NFT_JUMP_STACK_SIZE)
3643 return -EMLINK;
3644
a654de8f
PNA		 3645 list_for_each_entry(rule, &chain->rules, list) {
3646 if (!nft_is_active_next(ctx->net, rule))
3647 continue;
3648
3649 nft_rule_for_each_expr(expr, last, rule) {
3650 if (!expr->ops->validate)
3651 continue;
3652
3653 err = expr->ops->validate(ctx, expr, &data);
3654 if (err < 0)
3655 return err;
3656 }
81ea0106
FW		 3657
3658 cond_resched();
a654de8f
PNA		 3659 }
3660
3661 return 0;
3662}
3663EXPORT_SYMBOL_GPL(nft_chain_validate);
3664
3665static int nft_table_validate(struct net *net, const struct nft_table *table)
3666{
3667 struct nft_chain *chain;
3668 struct nft_ctx ctx = {
3669 .net = net,
3670 .family = table->family,
3671 };
3672 int err;
3673
3674 list_for_each_entry(chain, &table->chains, list) {
3675 if (!nft_is_base_chain(chain))
3676 continue;
3677
3678 ctx.chain = chain;
3679 err = nft_chain_validate(&ctx, chain);
3680 if (err < 0)
3681 return err;
3682 }
3683
3684 return 0;
3685}
3686
d46fc894
PNA		 3687int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
3688 const struct nft_set_iter *iter,
3689 struct nft_set_elem *elem)
3690{
3691 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
3692 struct nft_ctx *pctx = (struct nft_ctx *)ctx;
3693 const struct nft_data *data;
3694 int err;
3695
3696 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
3697 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
3698 return 0;
3699
3700 data = nft_set_ext_data(ext);
3701 switch (data->verdict.code) {
3702 case NFT_JUMP:
3703 case NFT_GOTO:
3704 pctx->level++;
3705 err = nft_chain_validate(ctx, data->verdict.chain);
3706 if (err < 0)
3707 return err;
3708 pctx->level--;
3709 break;
3710 default:
3711 break;
3712 }
3713
3714 return 0;
3715}
3716
d46fc894
PNA		 3717int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
3718{
3719 u8 genmask = nft_genmask_next(ctx->net);
3720 struct nft_set_elem_catchall *catchall;
3721 struct nft_set_elem elem;
3722 struct nft_set_ext *ext;
3723 int ret = 0;
3724
3725 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
3726 ext = nft_set_elem_ext(set, catchall->elem);
3727 if (!nft_set_elem_active(ext, genmask))
3728 continue;
3729
3730 elem.priv = catchall->elem;
3731 ret = nft_setelem_validate(ctx, set, NULL, &elem);
3732 if (ret < 0)
3733 return ret;
3734 }
3735
3736 return ret;
3737}
3738
75dd48e2 3739static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3740 const struct nft_chain *chain,
75dd48e2
PS		 3741 const struct nlattr *nla);
3742
1081d11b
PNA		 3743#define NFT_RULE_MAXEXPRS 128
3744
7dab8ee3
PNA		 3745static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3746 const struct nlattr * const nla[])
96518518 3747{
7dab8ee3 3748 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3749 struct netlink_ext_ack *extack = info->extack;
3750 unsigned int size, i, n, ulen = 0, usize = 0;
3751 u8 genmask = nft_genmask_next(info->net);
3752 struct nft_rule *rule, *old_rule = NULL;
3753 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3754 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3755 struct nft_flow_rule *flow = NULL;
7dab8ee3 3756 struct net *net = info->net;
7dab8ee3 3757 struct nft_userdata *udata;
96518518
PM		 3758 struct nft_table *table;
3759 struct nft_chain *chain;
7dab8ee3
PNA		 3760 struct nft_trans *trans;
3761 u64 handle, pos_handle;
96518518
PM		 3762 struct nft_expr *expr;
3763 struct nft_ctx ctx;
3764 struct nlattr *tmp;
96518518 3765 int err, rem;
96518518 3766
0854db2a 3767 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3768
6001a930
PNA		 3769 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3770 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3771 if (IS_ERR(table)) {
3772 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3773 return PTR_ERR(table);
36dd1bcc 3774 }
96518518 3775
837830a4
PNA		 3776 if (nla[NFTA_RULE_CHAIN]) {
3777 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3778 genmask);
3779 if (IS_ERR(chain)) {
3780 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3781 return PTR_ERR(chain);
3782 }
d0e2c7de
PNA		 3783 if (nft_chain_is_bound(chain))
3784 return -EOPNOTSUPP;
3785
837830a4 3786 } else if (nla[NFTA_RULE_CHAIN_ID]) {
95f466d2 3787 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
837830a4
PNA		 3788 if (IS_ERR(chain)) {
3789 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3790 return PTR_ERR(chain);
3791 }
3792 } else {
3793 return -EINVAL;
36dd1bcc 3794 }
96518518
PM		 3795
3796 if (nla[NFTA_RULE_HANDLE]) {
3797 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3798 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3799 if (IS_ERR(rule)) {
3800 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3801 return PTR_ERR(rule);
36dd1bcc 3802 }
96518518 3803
7dab8ee3 3804 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3805 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3806 return -EEXIST;
36dd1bcc 3807 }
7dab8ee3 3808 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3809 old_rule = rule;
3810 else
3811 return -EOPNOTSUPP;
3812 } else {
7dab8ee3
PNA		 3813 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3814 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3815 return -EINVAL;
3816 handle = nf_tables_alloc_handle(table);
a0a7379e
PNA		 3817
3818 if (chain->use == UINT_MAX)
3819 return -EOVERFLOW;
5e948466 3820
447750f2
FW		 3821 if (nla[NFTA_RULE_POSITION]) {
3822 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3823 old_rule = __nft_rule_lookup(chain, pos_handle);
3824 if (IS_ERR(old_rule)) {
3825 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3826 return PTR_ERR(old_rule);
3827 }
75dd48e2 3828 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3829 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3830 if (IS_ERR(old_rule)) {
3831 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3832 return PTR_ERR(old_rule);
3833 }
36dd1bcc 3834 }
5e948466
EL		 3835 }
3836
7dab8ee3 3837 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3838
96518518
PM		 3839 n = 0;
3840 size = 0;
3841 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3842 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3843 sizeof(struct nft_expr_info),
3844 GFP_KERNEL);
3845 if (!expr_info)
2a43ecf9
FW		 3846 return -ENOMEM;
3847
96518518
PM		 3848 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3849 err = -EINVAL;
3850 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3851 goto err_release_expr;
96518518 3852 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3853 goto err_release_expr;
7dab8ee3 3854 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3855 if (err < 0) {
3856 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3857 goto err_release_expr;
c781471d 3858 }
7dab8ee3 3859 size += expr_info[n].ops->size;
96518518
PM		 3860 n++;
3861 }
3862 }
9889840f
PM		 3863 /* Check for overflow of dlen field */
3864 err = -EFBIG;
3865 if (size >= 1 << 12)
3c5e4462 3866 goto err_release_expr;
96518518 3867
86f1ec32 3868 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3869 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3870 if (ulen > 0)
3871 usize = sizeof(struct nft_userdata) + ulen;
3872 }
0768b3b3 3873
96518518 3874 err = -ENOMEM;
33758c89 3875 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3876 if (rule == NULL)
3c5e4462 3877 goto err_release_expr;
96518518 3878
889f7ee7 3879 nft_activate_next(net, rule);
0628b123 3880
96518518
PM		 3881 rule->handle = handle;
3882 rule->dlen = size;
86f1ec32 3883 rule->udata = ulen ? 1 : 0;
0768b3b3 3884
86f1ec32
PM		 3885 if (ulen) {
3886 udata = nft_userdata(rule);
3887 udata->len = ulen - 1;
3888 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3889 }
96518518 3890
96518518
PM		 3891 expr = nft_expr_first(rule);
3892 for (i = 0; i < n; i++) {
7dab8ee3 3893 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 3894 if (err < 0) {
7dab8ee3 3895 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 3896 goto err_release_rule;
83d9dcba 3897 }
a654de8f 3898
7dab8ee3 3899 if (expr_info[i].ops->validate)
00c320f9 3900 nft_validate_state_update(table, NFT_VALIDATE_NEED);
a654de8f 3901
7dab8ee3 3902 expr_info[i].ops = NULL;
96518518
PM		 3903 expr = nft_expr_next(expr);
3904 }
3905
3c5e4462
PNA		 3906 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3907 flow = nft_flow_rule_create(net, rule);
3908 if (IS_ERR(flow)) {
3909 err = PTR_ERR(flow);
3910 goto err_release_rule;
3911 }
3912 }
3913
7dab8ee3 3914 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
2c964c55
PNA		 3915 err = nft_delrule(&ctx, old_rule);
3916 if (err < 0)
3917 goto err_destroy_flow_rule;
3918
ca089878 3919 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 3920 if (trans == NULL) {
3921 err = -ENOMEM;
3c5e4462 3922 goto err_destroy_flow_rule;
569ccae6 3923 }
569ccae6
FW		 3924 list_add_tail_rcu(&rule->list, &old_rule->list);
3925 } else {
c9626a2c
PNA		 3926 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3927 if (!trans) {
569ccae6 3928 err = -ENOMEM;
3c5e4462 3929 goto err_destroy_flow_rule;
569ccae6
FW		 3930 }
3931
7dab8ee3 3932 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 3933 if (old_rule)
3934 list_add_rcu(&rule->list, &old_rule->list);
3935 else
3936 list_add_tail_rcu(&rule->list, &chain->rules);
3937 } else {
3938 if (old_rule)
3939 list_add_tail_rcu(&rule->list, &old_rule->list);
3940 else
3941 list_add_rcu(&rule->list, &chain->rules);
3942 }
0628b123 3943 }
7dab8ee3 3944 kvfree(expr_info);
4fefee57 3945 chain->use++;
96518518 3946
3c5e4462
PNA		 3947 if (flow)
3948 nft_trans_flow_rule(trans) = flow;
3949
00c320f9 3950 if (table->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 3951 return nft_table_validate(net, table);
3952
3953 return 0;
3c5e4462
PNA		 3954
3955err_destroy_flow_rule:
4ca041f9
CIK		 3956 if (flow)
3957 nft_flow_rule_destroy(flow);
3c5e4462 3958err_release_rule:
26b5a571 3959 nft_rule_expr_deactivate(&ctx, rule, NFT_TRANS_PREPARE_ERROR);
1240eb93 3960 nf_tables_rule_destroy(&ctx, rule);
3c5e4462 3961err_release_expr:
96518518 3962 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 3963 if (expr_info[i].ops) {
3964 module_put(expr_info[i].ops->type->owner);
3965 if (expr_info[i].ops->type->release_ops)
3966 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 3967 }
96518518 3968 }
7dab8ee3
PNA		 3969 kvfree(expr_info);
3970
96518518
PM		 3971 return err;
3972}
3973
1a94e38d 3974static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3975 const struct nft_chain *chain,
1a94e38d
PNA		 3976 const struct nlattr *nla)
3977{
d59d2f82 3978 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 3979 u32 id = ntohl(nla_get_be32(nla));
3980 struct nft_trans *trans;
3981
0854db2a 3982 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d 3983 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 3984 trans->ctx.chain == chain &&
1a94e38d 3985 id == nft_trans_rule_id(trans))
e3c361b8 3986 return nft_trans_rule(trans);
1a94e38d
PNA		 3987 }
3988 return ERR_PTR(-ENOENT);
3989}
3990
7dab8ee3
PNA		 3991static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3992 const struct nlattr * const nla[])
96518518 3993{
7dab8ee3 3994 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 3995 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 3996 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 3997 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 3998 struct net *net = info->net;
3999 struct nft_table *table;
cf9dc09d 4000 struct nft_rule *rule;
0628b123 4001 struct nft_ctx ctx;
ef4b65e5 4002 int err = 0;
96518518 4003
6001a930
PNA		 4004 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
4005 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4006 if (IS_ERR(table)) {
4007 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 4008 return PTR_ERR(table);
36dd1bcc 4009 }
96518518 4010
cf9dc09d 4011 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 4012 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
4013 genmask);
36dd1bcc 4014 if (IS_ERR(chain)) {
1fb7696a 4015 if (PTR_ERR(chain) == -ENOENT &&
f80a612d
FFM		 4016 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4017 return 0;
4018
36dd1bcc 4019 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 4020 return PTR_ERR(chain);
36dd1bcc 4021 }
d0e2c7de
PNA		 4022 if (nft_chain_is_bound(chain))
4023 return -EOPNOTSUPP;
cf9dc09d 4024 }
96518518 4025
7dab8ee3 4026 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 4027
cf9dc09d
PNA		 4028 if (chain) {
4029 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 4030 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc 4031 if (IS_ERR(rule)) {
f80a612d
FFM		 4032 if (PTR_ERR(rule) == -ENOENT &&
4033 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4034 return 0;
4035
36dd1bcc 4036 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 4037 return PTR_ERR(rule);
36dd1bcc 4038 }
96518518 4039
1a94e38d
PNA		 4040 err = nft_delrule(&ctx, rule);
4041 } else if (nla[NFTA_RULE_ID]) {
36d5b291 4042 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 4043 if (IS_ERR(rule)) {
4044 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 4045 return PTR_ERR(rule);
36dd1bcc 4046 }
1a94e38d 4047
5e266fe7 4048 err = nft_delrule(&ctx, rule);
cf9dc09d 4049 } else {
ce24b721 4050 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 4051 }
4052 } else {
4053 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 4054 if (!nft_is_active_next(net, chain))
4055 continue;
4056
cf9dc09d 4057 ctx.chain = chain;
ce24b721 4058 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 4059 if (err < 0)
4060 break;
4061 }
4062 }
4063
4064 return err;
4065}
4066
20a69341
PM		 4067/*
4068 * Sets
4069 */
e32a4dc6
FW		 4070static const struct nft_set_type *nft_set_types[] = {
4071 &nft_set_hash_fast_type,
4072 &nft_set_hash_type,
4073 &nft_set_rhash_type,
4074 &nft_set_bitmap_type,
4075 &nft_set_rbtree_type,
e6abef61 4076#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 4077 &nft_set_pipapo_avx2_type,
4078#endif
e32a4dc6
FW		 4079 &nft_set_pipapo_type,
4080};
20a69341 4081
2b664957 4082#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 4083 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
4084 NFT_SET_EVAL)
2b664957 4085
71cc0873 4086static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 4087{
71cc0873 4088 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 4089}
4090
c50b960c
PM		 4091/*
4092 * Select a set implementation based on the data characteristics and the
4093 * given policy. The total memory use might not be known if no size is
4094 * given, in that case the amount of memory per element is used.
4095 */
4096static const struct nft_set_ops *
2b664957
PNA		 4097nft_select_set_ops(const struct nft_ctx *ctx,
4098 const struct nlattr * const nla[],
bed4a63e 4099 const struct nft_set_desc *desc)
20a69341 4100{
d59d2f82 4101 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 4102 const struct nft_set_ops *ops, *bops;
4103 struct nft_set_estimate est, best;
2b664957
PNA		 4104 const struct nft_set_type *type;
4105 u32 flags = 0;
e32a4dc6 4106 int i;
20a69341 4107
0854db2a 4108 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 4109 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 4110
2b664957
PNA		 4111 if (nla[NFTA_SET_FLAGS] != NULL)
4112 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 4113
55af753c
PNA		 4114 bops = NULL;
4115 best.size = ~0;
4116 best.lookup = ~0;
0b5a7874 4117 best.space = ~0;
c50b960c 4118
e32a4dc6
FW		 4119 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
4120 type = nft_set_types[i];
71cc0873 4121 ops = &type->ops;
2b664957 4122
71cc0873 4123 if (!nft_set_ops_candidate(type, flags))
20a69341 4124 continue;
2b664957 4125 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 4126 continue;
4127
bed4a63e 4128 switch (desc->policy) {
c50b960c 4129 case NFT_SET_POL_PERFORMANCE:
55af753c 4130 if (est.lookup < best.lookup)
c50b960c 4131 break;
644e334e
PNA		 4132 if (est.lookup == best.lookup &&
4133 est.space < best.space)
4134 break;
c50b960c
PM		 4135 continue;
4136 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 4137 if (!desc->size) {
4138 if (est.space < best.space)
4139 break;
4140 if (est.space == best.space &&
4141 est.lookup < best.lookup)
4142 break;
4f2921ca 4143 } else if (est.size < best.size || !bops) {
c50b960c 4144 break;
0b5a7874 4145 }
c50b960c
PM		 4146 continue;
4147 default:
4148 break;
4149 }
4150
c50b960c
PM		 4151 bops = ops;
4152 best = est;
20a69341
PM		 4153 }
4154
c50b960c
PM		 4155 if (bops != NULL)
4156 return bops;
4157
20a69341
PM		 4158 return ERR_PTR(-EOPNOTSUPP);
4159}
4160
4161static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 4162 [NFTA_SET_TABLE] = { .type = NLA_STRING,
4163 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 4164 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 4165 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 4166 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
4167 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
4168 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
4169 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
4170 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 4171 [NFTA_SET_POLICY] = { .type = NLA_U32 },
4172 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 4173 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 4174 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
4175 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 4176 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
4177 .len = NFT_USERDATA_MAXLEN },
8aeff920 4178 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 4179 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 4180 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
48b0ae04 4181 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
c50b960c
PM		 4182};
4183
4184static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
4185 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
f3a2181e 4186 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
20a69341
PM		 4187};
4188
cac20fcd
PNA		 4189static struct nft_set *nft_set_lookup(const struct nft_table *table,
4190 const struct nlattr *nla, u8 genmask)
20a69341
PM		 4191{
4192 struct nft_set *set;
4193
4194 if (nla == NULL)
4195 return ERR_PTR(-EINVAL);
4196
d9adf22a 4197 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 4198 if (!nla_strcmp(nla, set->name) &&
4199 nft_active_genmask(set, genmask))
20a69341
PM		 4200 return set;
4201 }
4202 return ERR_PTR(-ENOENT);
4203}
4204
cac20fcd
PNA		 4205static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
4206 const struct nlattr *nla,
4207 u8 genmask)
3ecbfd65
HS		 4208{
4209 struct nft_set *set;
4210
3ecbfd65
HS		 4211 list_for_each_entry(set, &table->sets, list) {
4212 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
4213 nft_active_genmask(set, genmask))
4214 return set;
4215 }
4216 return ERR_PTR(-ENOENT);
4217}
4218
cac20fcd 4219static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 4220 const struct nft_table *table,
cac20fcd 4221 const struct nlattr *nla, u8 genmask)
958bee14 4222{
d59d2f82 4223 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 4224 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 4225 struct nft_trans *trans;
958bee14 4226
0854db2a 4227 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 4228 if (trans->msg_type == NFT_MSG_NEWSET) {
4229 struct nft_set *set = nft_trans_set(trans);
37a9cc52 4230
9c7f96fd 4231 if (id == nft_trans_set_id(trans) &&
470ee20e 4232 set->table == table &&
9c7f96fd
AK		 4233 nft_active_genmask(set, genmask))
4234 return set;
4235 }
958bee14
PNA		 4236 }
4237 return ERR_PTR(-ENOENT);
4238}
c7a72e3f 4239
10659cba
PNA		 4240struct nft_set *nft_set_lookup_global(const struct net *net,
4241 const struct nft_table *table,
4242 const struct nlattr *nla_set_name,
4243 const struct nlattr *nla_set_id,
4244 u8 genmask)
c7a72e3f
PNA		 4245{
4246 struct nft_set *set;
4247
cac20fcd 4248 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 4249 if (IS_ERR(set)) {
4250 if (!nla_set_id)
4251 return set;
4252
470ee20e 4253 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 4254 }
4255 return set;
4256}
10659cba 4257EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 4258
20a69341
PM		 4259static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
4260 const char *name)
4261{
4262 const struct nft_set *i;
4263 const char *p;
4264 unsigned long *inuse;
60eb1894 4265 unsigned int n = 0, min = 0;
20a69341 4266
38745490 4267 p = strchr(name, '%');
20a69341
PM		 4268 if (p != NULL) {
4269 if (p[1] != 'd' || strchr(p + 2, '%'))
4270 return -EINVAL;
4271
4272 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
4273 if (inuse == NULL)
4274 return -ENOMEM;
60eb1894 4275cont:
20a69341 4276 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 4277 int tmp;
4278
271c5ca8 4279 if (!nft_is_active_next(ctx->net, i))
37a9cc52 4280 continue;
14662917 4281 if (!sscanf(i->name, name, &tmp))
20a69341 4282 continue;
60eb1894 4283 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 4284 continue;
14662917 4285
60eb1894 4286 set_bit(tmp - min, inuse);
20a69341
PM		 4287 }
4288
53b70287 4289 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 4290 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
4291 min += BITS_PER_BYTE * PAGE_SIZE;
4292 memset(inuse, 0, PAGE_SIZE);
4293 goto cont;
4294 }
20a69341
PM		 4295 free_page((unsigned long)inuse);
4296 }
4297
33758c89 4298 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 4299 if (!set->name)
4300 return -ENOMEM;
4301
20a69341 4302 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 4303 if (!nft_is_active_next(ctx->net, i))
4304 continue;
e63aaaa6
AY		 4305 if (!strcmp(set->name, i->name)) {
4306 kfree(set->name);
7fb6f78d 4307 set->name = NULL;
20a69341 4308 return -ENFILE;
e63aaaa6 4309 }
20a69341
PM		 4310 }
4311 return 0;
4312}
4313
917d80d3 4314int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 4315{
4316 u64 ms = be64_to_cpu(nla_get_be64(nla));
4317 u64 max = (u64)(~((u64)0));
4318
4319 max = div_u64(max, NSEC_PER_MSEC);
4320 if (ms >= max)
4321 return -ERANGE;
4322
4323 ms *= NSEC_PER_MSEC;
4324 *result = nsecs_to_jiffies64(ms);
4325 return 0;
4326}
4327
917d80d3 4328__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 4329{
3b15d09f 4330 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 4331}
4332
f3a2181e
SB		 4333static int nf_tables_fill_set_concat(struct sk_buff *skb,
4334 const struct nft_set *set)
4335{
4336 struct nlattr *concat, *field;
4337 int i;
4338
4339 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4340 if (!concat)
4341 return -ENOMEM;
4342
4343 for (i = 0; i < set->field_count; i++) {
4344 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4345 if (!field)
4346 return -ENOMEM;
4347
4348 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4349 htonl(set->field_len[i])))
4350 return -ENOMEM;
4351
4352 nla_nest_end(skb, field);
4353 }
4354
4355 nla_nest_end(skb, concat);
4356
4357 return 0;
4358}
4359
20a69341
PM		 4360static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4361 const struct nft_set *set, u16 event, u16 flags)
4362{
123b9961
PNA		 4363 u64 timeout = READ_ONCE(set->timeout);
4364 u32 gc_int = READ_ONCE(set->gc_int);
128ad332 4365 u32 portid = ctx->portid;
123b9961 4366 struct nlmsghdr *nlh;
65038428 4367 struct nlattr *nest;
128ad332 4368 u32 seq = ctx->seq;
48b0ae04 4369 int i;
20a69341 4370
dedb67c4 4371 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4372 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4373 NFNETLINK_V0, nft_base_seq(ctx->net));
4374 if (!nlh)
20a69341
PM		 4375 goto nla_put_failure;
4376
20a69341
PM		 4377 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4378 goto nla_put_failure;
4379 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4380 goto nla_put_failure;
3ecbfd65
HS		 4381 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4382 NFTA_SET_PAD))
4383 goto nla_put_failure;
28339b21
PNA		 4384
4385 if (event == NFT_MSG_DELSET) {
4386 nlmsg_end(skb, nlh);
4387 return 0;
4388 }
4389
20a69341
PM		 4390 if (set->flags != 0)
4391 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4392 goto nla_put_failure;
4393
4394 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4395 goto nla_put_failure;
4396 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4397 goto nla_put_failure;
4398 if (set->flags & NFT_SET_MAP) {
4399 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4400 goto nla_put_failure;
4401 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4402 goto nla_put_failure;
4403 }
8aeff920
PNA		 4404 if (set->flags & NFT_SET_OBJECT &&
4405 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4406 goto nla_put_failure;
20a69341 4407
123b9961 4408 if (timeout &&
d3e2a111 4409 nla_put_be64(skb, NFTA_SET_TIMEOUT,
123b9961 4410 nf_jiffies64_to_msecs(timeout),
b46f6ded 4411 NFTA_SET_PAD))
761da293 4412 goto nla_put_failure;
123b9961
PNA		 4413 if (gc_int &&
4414 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(gc_int)))
761da293
PM		 4415 goto nla_put_failure;
4416
9363dc4b
AB		 4417 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4418 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4419 goto nla_put_failure;
4420 }
4421
6f03bf43
PNA		 4422 if (set->udata &&
4423 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4424 goto nla_put_failure;
4425
65038428
PNA		 4426 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4427 if (!nest)
c50b960c
PM		 4428 goto nla_put_failure;
4429 if (set->size &&
4430 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4431 goto nla_put_failure;
f3a2181e
SB		 4432
4433 if (set->field_count > 1 &&
4434 nf_tables_fill_set_concat(skb, set))
4435 goto nla_put_failure;
4436
65038428
PNA		 4437 nla_nest_end(skb, nest);
4438
8cfd9b0f 4439 if (set->num_exprs == 1) {
65038428 4440 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8daa8fde 4441 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
65038428
PNA		 4442 goto nla_put_failure;
4443
4444 nla_nest_end(skb, nest);
48b0ae04
PNA		 4445 } else if (set->num_exprs > 1) {
4446 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4447 if (nest == NULL)
65038428
PNA		 4448 goto nla_put_failure;
4449
48b0ae04
PNA		 4450 for (i = 0; i < set->num_exprs; i++) {
4451 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
8daa8fde 4452 set->exprs[i], false) < 0)
48b0ae04
PNA		 4453 goto nla_put_failure;
4454 }
65038428
PNA		 4455 nla_nest_end(skb, nest);
4456 }
c50b960c 4457
053c095a
JB		 4458 nlmsg_end(skb, nlh);
4459 return 0;
20a69341
PM		 4460
4461nla_put_failure:
4462 nlmsg_trim(skb, nlh);
4463 return -1;
4464}
4465
25e94a99
PNA		 4466static void nf_tables_set_notify(const struct nft_ctx *ctx,
4467 const struct nft_set *set, int event,
4468 gfp_t gfp_flags)
20a69341 4469{
d59d2f82 4470 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4471 u32 portid = ctx->portid;
6fb721cf
PNA		 4472 struct sk_buff *skb;
4473 u16 flags = 0;
20a69341
PM		 4474 int err;
4475
128ad332
PNA		 4476 if (!ctx->report &&
4477 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4478 return;
20a69341 4479
31f8441c 4480 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4481 if (skb == NULL)
4482 goto err;
4483
6fb721cf
PNA		 4484 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4485 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4486
4487 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4488 if (err < 0) {
4489 kfree_skb(skb);
4490 goto err;
4491 }
4492
0854db2a 4493 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4494 return;
20a69341 4495err:
25e94a99 4496 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4497}
4498
5b96af77 4499static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4500{
4501 const struct nft_set *set;
4502 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4503 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4504 struct net *net = sock_net(skb->sk);
5b96af77 4505 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4506 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4507
4508 if (cb->args[1])
4509 return skb->len;
4510
e688a7f8 4511 rcu_read_lock();
d59d2f82 4512 nft_net = nft_pernet(net);
34002783 4513 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4514
0854db2a 4515 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4516 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4517 ctx->family != table->family)
36596dad
PNA		 4518 continue;
4519
4520 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4521 continue;
4522
36596dad
PNA		 4523 if (cur_table) {
4524 if (cur_table != table)
c9c8e485
PNA		 4525 continue;
4526
36596dad 4527 cur_table = NULL;
c9c8e485 4528 }
36596dad
PNA		 4529 idx = 0;
4530 list_for_each_entry_rcu(set, &table->sets, list) {
4531 if (idx < s_idx)
4532 goto cont;
4533 if (!nft_is_active(net, set))
4534 goto cont;
5b96af77 4535
36596dad
PNA		 4536 ctx_set = *ctx;
4537 ctx_set.table = table;
98319cb9 4538 ctx_set.family = table->family;
c9c8e485 4539
36596dad
PNA		 4540 if (nf_tables_fill_set(skb, &ctx_set, set,
4541 NFT_MSG_NEWSET,
4542 NLM_F_MULTI) < 0) {
4543 cb->args[0] = idx;
4544 cb->args[2] = (unsigned long) table;
4545 goto done;
c9c8e485 4546 }
36596dad 4547 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4548cont:
36596dad 4549 idx++;
c9c8e485 4550 }
36596dad
PNA		 4551 if (s_idx)
4552 s_idx = 0;
c9c8e485
PNA		 4553 }
4554 cb->args[1] = 1;
4555done:
e688a7f8 4556 rcu_read_unlock();
c9c8e485
PNA		 4557 return skb->len;
4558}
4559
90fd131a
FW		 4560static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4561{
4562 struct nft_ctx *ctx_dump = NULL;
4563
4564 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4565 if (ctx_dump == NULL)
4566 return -ENOMEM;
4567
4568 cb->data = ctx_dump;
4569 return 0;
4570}
4571
5b96af77 4572static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4573{
5b96af77
PNA		 4574 kfree(cb->data);
4575 return 0;
20a69341
PM		 4576}
4577
d9adf22a 4578/* called with rcu_read_lock held */
797d4980
PNA		 4579static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4580 const struct nlattr * const nla[])
20a69341 4581{
797d4980
PNA		 4582 struct netlink_ext_ack *extack = info->extack;
4583 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4584 u8 family = info->nfmsg->nfgen_family;
4585 struct nft_table *table = NULL;
797d4980 4586 struct net *net = info->net;
20a69341 4587 const struct nft_set *set;
20a69341 4588 struct sk_buff *skb2;
797d4980 4589 struct nft_ctx ctx;
20a69341
PM		 4590 int err;
4591
67086651
PNA		 4592 if (nla[NFTA_SET_TABLE]) {
4593 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4594 genmask, 0);
4595 if (IS_ERR(table)) {
4596 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4597 return PTR_ERR(table);
4598 }
4599 }
4600
4601 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4602
797d4980 4603 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4604 struct netlink_dump_control c = {
90fd131a 4605 .start = nf_tables_dump_sets_start,
20a69341 4606 .dump = nf_tables_dump_sets,
5b96af77 4607 .done = nf_tables_dump_sets_done,
90fd131a 4608 .data = &ctx,
d9adf22a 4609 .module = THIS_MODULE,
20a69341 4610 };
5b96af77 4611
797d4980 4612 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4613 }
4614
c9c8e485 4615 /* Only accept unspec with dump */
ef4b65e5 4616 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4617 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4618 if (!nla[NFTA_SET_TABLE])
4619 return -EINVAL;
c9c8e485 4620
67086651 4621 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341
PM		 4622 if (IS_ERR(set))
4623 return PTR_ERR(set);
4624
d9adf22a 4625 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4626 if (skb2 == NULL)
4627 return -ENOMEM;
4628
4629 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4630 if (err < 0)
ee921183 4631 goto err_fill_set_info;
20a69341 4632
ee921183 4633 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4634
ee921183 4635err_fill_set_info:
20a69341
PM		 4636 kfree_skb(skb2);
4637 return err;
4638}
4639
f3a2181e
SB		 4640static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4641 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4642};
4643
4644static int nft_set_desc_concat_parse(const struct nlattr *attr,
4645 struct nft_set_desc *desc)
4646{
4647 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4648 u32 len;
4649 int err;
4650
fecf31ee
PNA		 4651 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4652 return -E2BIG;
4653
f3a2181e
SB		 4654 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4655 nft_concat_policy, NULL);
4656 if (err < 0)
4657 return err;
4658
4659 if (!tb[NFTA_SET_FIELD_LEN])
4660 return -EINVAL;
4661
4662 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4663 if (!len || len > U8_MAX)
4664 return -EINVAL;
f3a2181e
SB		 4665
4666 desc->field_len[desc->field_count++] = len;
4667
4668 return 0;
4669}
4670
4671static int nft_set_desc_concat(struct nft_set_desc *desc,
4672 const struct nlattr *nla)
4673{
4674 struct nlattr *attr;
fecf31ee
PNA		 4675 u32 num_regs = 0;
4676 int rem, err, i;
f3a2181e
SB		 4677
4678 nla_for_each_nested(attr, nla, rem) {
4679 if (nla_type(attr) != NFTA_LIST_ELEM)
4680 return -EINVAL;
4681
4682 err = nft_set_desc_concat_parse(attr, desc);
4683 if (err < 0)
4684 return err;
4685 }
4686
fecf31ee
PNA		 4687 for (i = 0; i < desc->field_count; i++)
4688 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4689
4690 if (num_regs > NFT_REG32_COUNT)
4691 return -E2BIG;
4692
f3a2181e
SB		 4693 return 0;
4694}
4695
f7e840ee 4696static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4697 const struct nlattr *nla)
4698{
4699 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4700 int err;
4701
8cb08174
JB		 4702 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4703 nft_set_desc_policy, NULL);
c50b960c
PM		 4704 if (err < 0)
4705 return err;
4706
4707 if (da[NFTA_SET_DESC_SIZE] != NULL)
4708 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4709 if (da[NFTA_SET_DESC_CONCAT])
4710 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4711
f3a2181e 4712 return err;
c50b960c
PM		 4713}
4714
a8fe4154
PNA		 4715static int nft_set_expr_alloc(struct nft_ctx *ctx, struct nft_set *set,
4716 const struct nlattr * const *nla,
4717 struct nft_expr **exprs, int *num_exprs,
4718 u32 flags)
4719{
4720 struct nft_expr *expr;
4721 int err, i;
4722
4723 if (nla[NFTA_SET_EXPR]) {
4724 expr = nft_set_elem_expr_alloc(ctx, set, nla[NFTA_SET_EXPR]);
4725 if (IS_ERR(expr)) {
4726 err = PTR_ERR(expr);
4727 goto err_set_expr_alloc;
4728 }
4729 exprs[0] = expr;
4730 (*num_exprs)++;
4731 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4732 struct nlattr *tmp;
4733 int left;
4734
4735 if (!(flags & NFT_SET_EXPR)) {
4736 err = -EINVAL;
4737 goto err_set_expr_alloc;
4738 }
4739 i = 0;
4740 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4741 if (i == NFT_SET_EXPR_MAX) {
4742 err = -E2BIG;
4743 goto err_set_expr_alloc;
4744 }
4745 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4746 err = -EINVAL;
4747 goto err_set_expr_alloc;
4748 }
4749 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
4750 if (IS_ERR(expr)) {
4751 err = PTR_ERR(expr);
4752 goto err_set_expr_alloc;
4753 }
4754 exprs[i++] = expr;
4755 (*num_exprs)++;
4756 }
4757 }
4758
4759 return 0;
4760
4761err_set_expr_alloc:
4762 for (i = 0; i < *num_exprs; i++)
4763 nft_expr_destroy(ctx, exprs[i]);
4764
4765 return err;
4766}
4767
f6594c37
PNA		 4768static bool nft_set_is_same(const struct nft_set *set,
4769 const struct nft_set_desc *desc,
4770 struct nft_expr *exprs[], u32 num_exprs, u32 flags)
4771{
4772 int i;
4773
4774 if (set->ktype != desc->ktype ||
4775 set->dtype != desc->dtype ||
4776 set->flags != flags ||
4777 set->klen != desc->klen ||
4778 set->dlen != desc->dlen ||
4779 set->field_count != desc->field_count ||
4780 set->num_exprs != num_exprs)
4781 return false;
4782
4783 for (i = 0; i < desc->field_count; i++) {
4784 if (set->field_len[i] != desc->field_len[i])
4785 return false;
4786 }
4787
4788 for (i = 0; i < num_exprs; i++) {
4789 if (set->exprs[i]->ops != exprs[i]->ops)
4790 return false;
4791 }
4792
4793 return true;
4794}
4795
7dab8ee3
PNA		 4796static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4797 const struct nlattr * const nla[])
20a69341 4798{
7dab8ee3
PNA		 4799 struct netlink_ext_ack *extack = info->extack;
4800 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4801 u8 family = info->nfmsg->nfgen_family;
20a69341 4802 const struct nft_set_ops *ops;
7dab8ee3
PNA		 4803 struct net *net = info->net;
4804 struct nft_set_desc desc;
20a69341 4805 struct nft_table *table;
7dab8ee3 4806 unsigned char *udata;
20a69341
PM		 4807 struct nft_set *set;
4808 struct nft_ctx ctx;
6c8774a9 4809 size_t alloc_size;
a8fe4154 4810 int num_exprs = 0;
7dab8ee3
PNA		 4811 char *name;
4812 int err, i;
e6d8ecac 4813 u16 udlen;
bed4a63e 4814 u32 flags;
7dab8ee3 4815 u64 size;
20a69341
PM		 4816
4817 if (nla[NFTA_SET_TABLE] == NULL ||
4818 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4819 nla[NFTA_SET_KEY_LEN] == NULL ||
4820 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4821 return -EINVAL;
4822
c50b960c
PM		 4823 memset(&desc, 0, sizeof(desc));
4824
bed4a63e 4825 desc.ktype = NFT_DATA_VALUE;
20a69341 4826 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
bed4a63e
PNA		 4827 desc.ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4828 if ((desc.ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
20a69341
PM		 4829 return -EINVAL;
4830 }
4831
c50b960c 4832 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4833 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4834 return -EINVAL;
4835
4836 flags = 0;
4837 if (nla[NFTA_SET_FLAGS] != NULL) {
4838 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4839 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4840 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4841 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4842 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4843 return -EOPNOTSUPP;
8aeff920 4844 /* Only one of these operations is supported */
acab7131
FW		 4845 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4846 (NFT_SET_MAP | NFT_SET_OBJECT))
4847 return -EOPNOTSUPP;
4848 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4849 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4850 return -EOPNOTSUPP;
20a69341
PM		 4851 }
4852
bed4a63e 4853 desc.dtype = 0;
20a69341
PM		 4854 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4855 if (!(flags & NFT_SET_MAP))
4856 return -EINVAL;
4857
bed4a63e
PNA		 4858 desc.dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4859 if ((desc.dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4860 desc.dtype != NFT_DATA_VERDICT)
20a69341
PM		 4861 return -EINVAL;
4862
bed4a63e 4863 if (desc.dtype != NFT_DATA_VERDICT) {
20a69341
PM		 4864 if (nla[NFTA_SET_DATA_LEN] == NULL)
4865 return -EINVAL;
c50b960c 4866 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4867 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4868 return -EINVAL;
4869 } else
7d740264 4870 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 4871 } else if (flags & NFT_SET_MAP)
4872 return -EINVAL;
4873
8aeff920
PNA		 4874 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4875 if (!(flags & NFT_SET_OBJECT))
4876 return -EINVAL;
4877
bed4a63e
PNA		 4878 desc.objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4879 if (desc.objtype == NFT_OBJECT_UNSPEC ||
4880 desc.objtype > NFT_OBJECT_MAX)
d9583cdf 4881 return -EOPNOTSUPP;
8aeff920
PNA		 4882 } else if (flags & NFT_SET_OBJECT)
4883 return -EINVAL;
4884 else
bed4a63e 4885 desc.objtype = NFT_OBJECT_UNSPEC;
8aeff920 4886
bed4a63e 4887 desc.timeout = 0;
761da293
PM		 4888 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4889 if (!(flags & NFT_SET_TIMEOUT))
4890 return -EINVAL;
8e1102d5 4891
bed4a63e 4892 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &desc.timeout);
8e1102d5
FW		 4893 if (err)
4894 return err;
761da293 4895 }
bed4a63e 4896 desc.gc_int = 0;
761da293
PM		 4897 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4898 if (!(flags & NFT_SET_TIMEOUT))
4899 return -EINVAL;
bed4a63e 4900 desc.gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
761da293
PM		 4901 }
4902
bed4a63e 4903 desc.policy = NFT_SET_POL_PERFORMANCE;
c50b960c 4904 if (nla[NFTA_SET_POLICY] != NULL)
bed4a63e 4905 desc.policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
c50b960c
PM		 4906
4907 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 4908 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 4909 if (err < 0)
4910 return err;
1b6345d4
PNA		 4911
4912 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4913 return -EINVAL;
4914 } else if (flags & NFT_SET_CONCAT) {
4915 return -EINVAL;
c50b960c
PM		 4916 }
4917
48b0ae04 4918 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 4919 desc.expr = true;
4920
6001a930
PNA		 4921 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4922 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4923 if (IS_ERR(table)) {
4924 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 4925 return PTR_ERR(table);
36dd1bcc 4926 }
20a69341 4927
7dab8ee3 4928 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4929
cac20fcd 4930 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 4931 if (IS_ERR(set)) {
36dd1bcc
PNA		 4932 if (PTR_ERR(set) != -ENOENT) {
4933 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4934 return PTR_ERR(set);
36dd1bcc 4935 }
1a28ad74 4936 } else {
a8fe4154
PNA		 4937 struct nft_expr *exprs[NFT_SET_EXPR_MAX] = {};
4938
7dab8ee3 4939 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 4940 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4941 return -EEXIST;
36dd1bcc 4942 }
7dab8ee3 4943 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 4944 return -EOPNOTSUPP;
36dd1bcc 4945
a8fe4154
PNA		 4946 err = nft_set_expr_alloc(&ctx, set, nla, exprs, &num_exprs, flags);
4947 if (err < 0)
4948 return err;
4949
f6594c37
PNA		 4950 err = 0;
4951 if (!nft_set_is_same(set, &desc, exprs, num_exprs, flags)) {
4952 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4953 err = -EEXIST;
4954 }
4955
a8fe4154
PNA		 4956 for (i = 0; i < num_exprs; i++)
4957 nft_expr_destroy(&ctx, exprs[i]);
4958
123b9961
PNA		 4959 if (err < 0)
4960 return err;
4961
4962 return __nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set, &desc);
20a69341
PM		 4963 }
4964
7dab8ee3 4965 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 4966 return -ENOENT;
4967
bed4a63e 4968 ops = nft_select_set_ops(&ctx, nla, &desc);
20a69341
PM		 4969 if (IS_ERR(ops))
4970 return PTR_ERR(ops);
4971
e6d8ecac
CFG		 4972 udlen = 0;
4973 if (nla[NFTA_SET_USERDATA])
4974 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4975
20a69341
PM		 4976 size = 0;
4977 if (ops->privsize != NULL)
347b408d 4978 size = ops->privsize(nla, &desc);
6c8774a9 4979 alloc_size = sizeof(*set) + size + udlen;
45928afe 4980 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 4981 return -ENOMEM;
33758c89 4982 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
24d19826
FW		 4983 if (!set)
4984 return -ENOMEM;
20a69341 4985
33758c89 4986 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 4987 if (!name) {
4988 err = -ENOMEM;
65038428 4989 goto err_set_name;
38745490
PS		 4990 }
4991
20a69341 4992 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 4993 kfree(name);
20a69341 4994 if (err < 0)
ad9f151e
PNA		 4995 goto err_set_name;
4996
4997 udata = NULL;
4998 if (udlen) {
4999 udata = set->data + size;
5000 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
5001 }
5002
5003 INIT_LIST_HEAD(&set->bindings);
5004 INIT_LIST_HEAD(&set->catchall_list);
5005 set->table = table;
5006 write_pnet(&set->net, net);
5007 set->ops = ops;
bed4a63e 5008 set->ktype = desc.ktype;
ad9f151e 5009 set->klen = desc.klen;
bed4a63e
PNA		 5010 set->dtype = desc.dtype;
5011 set->objtype = desc.objtype;
ad9f151e
PNA		 5012 set->dlen = desc.dlen;
5013 set->flags = flags;
5014 set->size = desc.size;
bed4a63e 5015 set->policy = desc.policy;
ad9f151e
PNA		 5016 set->udlen = udlen;
5017 set->udata = udata;
bed4a63e
PNA		 5018 set->timeout = desc.timeout;
5019 set->gc_int = desc.gc_int;
ad9f151e
PNA		 5020
5021 set->field_count = desc.field_count;
5022 for (i = 0; i < desc.field_count; i++)
5023 set->field_len[i] = desc.field_len[i];
5024
5025 err = ops->init(set, &desc, nla);
5026 if (err < 0)
5027 goto err_set_init;
65038428 5028
a8fe4154
PNA		 5029 err = nft_set_expr_alloc(&ctx, set, nla, set->exprs, &num_exprs, flags);
5030 if (err < 0)
5031 goto err_set_destroy;
20a69341 5032
a8fe4154 5033 set->num_exprs = num_exprs;
3ecbfd65 5034 set->handle = nf_tables_alloc_handle(table);
212ed75d 5035 INIT_LIST_HEAD(&set->pending_update);
20a69341 5036
958bee14 5037 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 5038 if (err < 0)
ad9f151e 5039 goto err_set_expr_alloc;
20a69341 5040
e688a7f8 5041 list_add_tail_rcu(&set->list, &table->sets);
4fefee57 5042 table->use++;
20a69341
PM		 5043 return 0;
5044
ad9f151e 5045err_set_expr_alloc:
8cfd9b0f
PNA		 5046 for (i = 0; i < set->num_exprs; i++)
5047 nft_expr_destroy(&ctx, set->exprs[i]);
a8fe4154 5048err_set_destroy:
628bd3e4 5049 ops->destroy(&ctx, set);
ad9f151e 5050err_set_init:
2f6adf48 5051 kfree(set->name);
65038428 5052err_set_name:
1ff75a3e 5053 kvfree(set);
20a69341
PM		 5054 return err;
5055}
5056
aaa31047
PNA		 5057static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
5058 struct nft_set *set)
5059{
0f7d9b31 5060 struct nft_set_elem_catchall *next, *catchall;
aaa31047 5061
0f7d9b31 5062 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047 5063 list_del_rcu(&catchall->list);
628bd3e4 5064 nf_tables_set_elem_destroy(ctx, set, catchall->elem);
ae089831 5065 kfree_rcu(catchall, rcu);
aaa31047
PNA		 5066 }
5067}
5068
0c2a85ed 5069static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 5070{
8cfd9b0f
PNA		 5071 int i;
5072
273fe3f1
PNA		 5073 if (WARN_ON(set->use > 0))
5074 return;
5075
8cfd9b0f
PNA		 5076 for (i = 0; i < set->num_exprs; i++)
5077 nft_expr_destroy(ctx, set->exprs[i]);
65038428 5078
628bd3e4 5079 set->ops->destroy(ctx, set);
aaa31047 5080 nft_set_catchall_destroy(ctx, set);
38745490 5081 kfree(set->name);
1ff75a3e 5082 kvfree(set);
20a69341
PM		 5083}
5084
7dab8ee3
PNA		 5085static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
5086 const struct nlattr * const nla[])
20a69341 5087{
7dab8ee3
PNA		 5088 struct netlink_ext_ack *extack = info->extack;
5089 u8 genmask = nft_genmask_next(info->net);
67086651 5090 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 5091 struct net *net = info->net;
36dd1bcc 5092 const struct nlattr *attr;
67086651 5093 struct nft_table *table;
20a69341
PM		 5094 struct nft_set *set;
5095 struct nft_ctx ctx;
20a69341 5096
ef4b65e5 5097 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 5098 return -EAFNOSUPPORT;
20a69341 5099
67086651
PNA		 5100 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
5101 genmask, NETLINK_CB(skb).portid);
5102 if (IS_ERR(table)) {
5103 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
5104 return PTR_ERR(table);
5105 }
20a69341 5106
36dd1bcc
PNA		 5107 if (nla[NFTA_SET_HANDLE]) {
5108 attr = nla[NFTA_SET_HANDLE];
67086651 5109 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 5110 } else {
5111 attr = nla[NFTA_SET_NAME];
67086651 5112 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 5113 }
a8278400 5114
36dd1bcc 5115 if (IS_ERR(set)) {
f80a612d
FFM		 5116 if (PTR_ERR(set) == -ENOENT &&
5117 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
5118 return 0;
5119
36dd1bcc
PNA		 5120 NL_SET_BAD_ATTR(extack, attr);
5121 return PTR_ERR(set);
5122 }
273fe3f1 5123 if (set->use ||
7dab8ee3
PNA		 5124 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
5125 atomic_read(&set->nelems) > 0)) {
36dd1bcc 5126 NL_SET_BAD_ATTR(extack, attr);
20a69341 5127 return -EBUSY;
36dd1bcc 5128 }
20a69341 5129
67086651
PNA		 5130 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5131
ee01d542 5132 return nft_delset(&ctx, set);
20a69341
PM		 5133}
5134
345023b0
PNA		 5135static int nft_validate_register_store(const struct nft_ctx *ctx,
5136 enum nft_registers reg,
5137 const struct nft_data *data,
5138 enum nft_data_types type,
5139 unsigned int len);
5140
97c976d6
PNA		 5141static int nft_setelem_data_validate(const struct nft_ctx *ctx,
5142 struct nft_set *set,
5143 struct nft_set_elem *elem)
20a69341 5144{
fe2811eb 5145 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5146 enum nft_registers dreg;
5147
5148 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 5149 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
5150 set->dtype == NFT_DATA_VERDICT ?
5151 NFT_DATA_VERDICT : NFT_DATA_VALUE,
5152 set->dlen);
20a69341
PM		 5153}
5154
97c976d6
PNA		 5155static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
5156 struct nft_set *set,
5157 const struct nft_set_iter *iter,
5158 struct nft_set_elem *elem)
5159{
5160 return nft_setelem_data_validate(ctx, set, elem);
5161}
5162
aaa31047
PNA		 5163static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
5164 struct nft_set *set)
5165{
5166 u8 genmask = nft_genmask_next(ctx->net);
5167 struct nft_set_elem_catchall *catchall;
5168 struct nft_set_elem elem;
5169 struct nft_set_ext *ext;
5170 int ret = 0;
5171
5172 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5173 ext = nft_set_elem_ext(set, catchall->elem);
5174 if (!nft_set_elem_active(ext, genmask))
5175 continue;
5176
5177 elem.priv = catchall->elem;
5178 ret = nft_setelem_data_validate(ctx, set, &elem);
5179 if (ret < 0)
5180 break;
5181 }
5182
5183 return ret;
5184}
5185
20a69341
PM		 5186int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
5187 struct nft_set_binding *binding)
5188{
5189 struct nft_set_binding *i;
5190 struct nft_set_iter iter;
5191
273fe3f1
PNA		 5192 if (set->use == UINT_MAX)
5193 return -EOVERFLOW;
5194
408070d6 5195 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 5196 return -EBUSY;
5197
11113e19 5198 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 5199 /* If the set is already bound to the same chain all
5200 * jumps are already validated for that chain.
5201 */
5202 list_for_each_entry(i, &set->bindings, list) {
a4684402 5203 if (i->flags & NFT_SET_MAP &&
11113e19 5204 i->chain == binding->chain)
20a69341
PM		 5205 goto bind;
5206 }
5207
8588ac09 5208 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 5209 iter.skip = 0;
5210 iter.count = 0;
5211 iter.err = 0;
5212 iter.fn = nf_tables_bind_check_setelem;
5213
5214 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 5215 if (!iter.err)
5216 iter.err = nft_set_catchall_bind_check(ctx, set);
5217
a02f4248 5218 if (iter.err < 0)
20a69341 5219 return iter.err;
20a69341
PM		 5220 }
5221bind:
5222 binding->chain = ctx->chain;
e688a7f8 5223 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585 5224 nft_set_trans_bind(ctx, set);
273fe3f1 5225 set->use++;
f6ac8585 5226
20a69341
PM		 5227 return 0;
5228}
63aea290 5229EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 5230
3b0a081d
FW		 5231static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
5232 struct nft_set_binding *binding, bool event)
20a69341 5233{
e688a7f8 5234 list_del_rcu(&binding->list);
20a69341 5235
f6ac8585 5236 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 5237 list_del_rcu(&set->list);
f6ac8585
PNA		 5238 if (event)
5239 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
5240 GFP_KERNEL);
5241 }
20a69341
PM		 5242}
5243
628bd3e4
PNA		 5244static void nft_setelem_data_activate(const struct net *net,
5245 const struct nft_set *set,
5246 struct nft_set_elem *elem);
5247
5248static int nft_mapelem_activate(const struct nft_ctx *ctx,
5249 struct nft_set *set,
5250 const struct nft_set_iter *iter,
5251 struct nft_set_elem *elem)
5252{
5253 nft_setelem_data_activate(ctx->net, set, elem);
5254
5255 return 0;
5256}
5257
5258static void nft_map_catchall_activate(const struct nft_ctx *ctx,
5259 struct nft_set *set)
5260{
5261 u8 genmask = nft_genmask_next(ctx->net);
5262 struct nft_set_elem_catchall *catchall;
5263 struct nft_set_elem elem;
5264 struct nft_set_ext *ext;
5265
5266 list_for_each_entry(catchall, &set->catchall_list, list) {
5267 ext = nft_set_elem_ext(set, catchall->elem);
5268 if (!nft_set_elem_active(ext, genmask))
5269 continue;
5270
5271 elem.priv = catchall->elem;
5272 nft_setelem_data_activate(ctx->net, set, &elem);
5273 break;
5274 }
5275}
5276
5277static void nft_map_activate(const struct nft_ctx *ctx, struct nft_set *set)
5278{
5279 struct nft_set_iter iter = {
5280 .genmask = nft_genmask_next(ctx->net),
5281 .fn = nft_mapelem_activate,
5282 };
5283
5284 set->ops->walk(ctx, set, &iter);
5285 WARN_ON_ONCE(iter.err);
5286
5287 nft_map_catchall_activate(ctx, set);
5288}
5289
c1592a89
PNA		 5290void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set)
5291{
628bd3e4
PNA		 5292 if (nft_set_is_anonymous(set)) {
5293 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5294 nft_map_activate(ctx, set);
5295
c1592a89 5296 nft_clear(ctx->net, set);
628bd3e4 5297 }
c1592a89
PNA		 5298
5299 set->use++;
5300}
5301EXPORT_SYMBOL_GPL(nf_tables_activate_set);
5302
273fe3f1
PNA		 5303void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
5304 struct nft_set_binding *binding,
5305 enum nft_trans_phase phase)
5306{
5307 switch (phase) {
26b5a571
PNA		 5308 case NFT_TRANS_PREPARE_ERROR:
5309 nft_set_trans_unbind(ctx, set);
5310 if (nft_set_is_anonymous(set))
5311 nft_deactivate_next(ctx->net, set);
5312
5313 set->use--;
5314 break;
273fe3f1 5315 case NFT_TRANS_PREPARE:
628bd3e4
PNA		 5316 if (nft_set_is_anonymous(set)) {
5317 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5318 nft_map_deactivate(ctx, set);
c1592a89 5319
628bd3e4
PNA		 5320 nft_deactivate_next(ctx->net, set);
5321 }
273fe3f1
PNA		 5322 set->use--;
5323 return;
5324 case NFT_TRANS_ABORT:
5325 case NFT_TRANS_RELEASE:
628bd3e4
PNA		 5326 if (nft_set_is_anonymous(set) &&
5327 set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5328 nft_map_deactivate(ctx, set);
5329
273fe3f1 5330 set->use--;
954d8297 5331 fallthrough;
273fe3f1
PNA		 5332 default:
5333 nf_tables_unbind_set(ctx, set, binding,
5334 phase == NFT_TRANS_COMMIT);
5335 }
5336}
5337EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
5338
cd5125d8
FW		 5339void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
5340{
f6ac8585 5341 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 5342 nft_set_destroy(ctx, set);
cd5125d8
FW		 5343}
5344EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
5345
3ac4c07a
PM		 5346const struct nft_set_ext_type nft_set_ext_types[] = {
5347 [NFT_SET_EXT_KEY] = {
7d740264 5348 .align = __alignof__(u32),
3ac4c07a
PM		 5349 },
5350 [NFT_SET_EXT_DATA] = {
7d740264 5351 .align = __alignof__(u32),
3ac4c07a 5352 },
563125a7
PNA		 5353 [NFT_SET_EXT_EXPRESSIONS] = {
5354 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 5355 },
8aeff920
PNA		 5356 [NFT_SET_EXT_OBJREF] = {
5357 .len = sizeof(struct nft_object *),
5358 .align = __alignof__(struct nft_object *),
5359 },
3ac4c07a
PM		 5360 [NFT_SET_EXT_FLAGS] = {
5361 .len = sizeof(u8),
5362 .align = __alignof__(u8),
5363 },
c3e1b005
PM		 5364 [NFT_SET_EXT_TIMEOUT] = {
5365 .len = sizeof(u64),
5366 .align = __alignof__(u64),
5367 },
5368 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 5369 .len = sizeof(u64),
5370 .align = __alignof__(u64),
c3e1b005 5371 },
68e942e8
PM		 5372 [NFT_SET_EXT_USERDATA] = {
5373 .len = sizeof(struct nft_userdata),
5374 .align = __alignof__(struct nft_userdata),
5375 },
7b225d0b
PNA		 5376 [NFT_SET_EXT_KEY_END] = {
5377 .align = __alignof__(u32),
5378 },
3ac4c07a 5379};
3ac4c07a 5380
20a69341
PM		 5381/*
5382 * Set elements
5383 */
5384
5385static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
5386 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
5387 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
5388 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 5389 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 5390 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 5391 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
5392 .len = NFT_USERDATA_MAXLEN },
467697d2 5393 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 5394 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
5395 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 5396 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
48b0ae04 5397 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
20a69341
PM		 5398};
5399
5400static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 5401 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
5402 .len = NFT_TABLE_MAXNAMELEN - 1 },
5403 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
5404 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341 5405 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
958bee14 5406 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 5407};
5408
563125a7
PNA		 5409static int nft_set_elem_expr_dump(struct sk_buff *skb,
5410 const struct nft_set *set,
5411 const struct nft_set_ext *ext)
5412{
5413 struct nft_set_elem_expr *elem_expr;
5414 u32 size, num_exprs = 0;
5415 struct nft_expr *expr;
48b0ae04 5416 struct nlattr *nest;
563125a7
PNA		 5417
5418 elem_expr = nft_set_ext_expr(ext);
5419 nft_setelem_expr_foreach(expr, elem_expr, size)
5420 num_exprs++;
5421
5422 if (num_exprs == 1) {
5423 expr = nft_setelem_expr_at(elem_expr, 0);
8daa8fde 5424 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, false) < 0)
563125a7
PNA		 5425 return -1;
5426
5427 return 0;
48b0ae04
PNA		 5428 } else if (num_exprs > 1) {
5429 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
5430 if (nest == NULL)
5431 goto nla_put_failure;
563125a7 5432
48b0ae04
PNA		 5433 nft_setelem_expr_foreach(expr, elem_expr, size) {
5434 expr = nft_setelem_expr_at(elem_expr, size);
8daa8fde 5435 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, false) < 0)
48b0ae04
PNA		 5436 goto nla_put_failure;
5437 }
5438 nla_nest_end(skb, nest);
5439 }
563125a7 5440 return 0;
48b0ae04
PNA		 5441
5442nla_put_failure:
5443 return -1;
563125a7
PNA		 5444}
5445
20a69341
PM		 5446static int nf_tables_fill_setelem(struct sk_buff *skb,
5447 const struct nft_set *set,
5448 const struct nft_set_elem *elem)
5449{
fe2811eb 5450 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5451 unsigned char *b = skb_tail_pointer(skb);
5452 struct nlattr *nest;
5453
ae0be8de 5454 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 5455 if (nest == NULL)
5456 goto nla_put_failure;
5457
aaa31047
PNA		 5458 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5459 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 5460 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 5461 goto nla_put_failure;
5462
7b225d0b
PNA		 5463 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5464 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5465 NFT_DATA_VALUE, set->klen) < 0)
5466 goto nla_put_failure;
5467
fe2811eb
PM		 5468 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5469 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 5470 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5471 set->dlen) < 0)
5472 goto nla_put_failure;
5473
563125a7
PNA		 5474 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
5475 nft_set_elem_expr_dump(skb, set, ext))
f25ad2e9
PM		 5476 goto nla_put_failure;
5477
8aeff920
PNA		 5478 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5479 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 5480 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 5481 goto nla_put_failure;
5482
fe2811eb
PM		 5483 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5484 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5485 htonl(*nft_set_ext_flags(ext))))
5486 goto nla_put_failure;
20a69341 5487
c3e1b005
PM		 5488 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
5489 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
8e1102d5 5490 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
b46f6ded 5491 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5492 goto nla_put_failure;
5493
5494 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 5495 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 5496
5497 expires = *nft_set_ext_expiration(ext);
8e1102d5 5498 if (time_before64(now, expires))
c3e1b005
PM		 5499 expires -= now;
5500 else
5501 expires = 0;
5502
5503 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 5504 nf_jiffies64_to_msecs(expires),
b46f6ded 5505 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5506 goto nla_put_failure;
5507 }
5508
68e942e8
PM		 5509 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5510 struct nft_userdata *udata;
5511
5512 udata = nft_set_ext_userdata(ext);
5513 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5514 udata->len + 1, udata->data))
5515 goto nla_put_failure;
5516 }
5517
20a69341
PM		 5518 nla_nest_end(skb, nest);
5519 return 0;
5520
5521nla_put_failure:
5522 nlmsg_trim(skb, b);
5523 return -EMSGSIZE;
5524}
5525
5526struct nft_set_dump_args {
5527 const struct netlink_callback *cb;
5528 struct nft_set_iter iter;
5529 struct sk_buff *skb;
5530};
5531
5532static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5533 struct nft_set *set,
20a69341 5534 const struct nft_set_iter *iter,
de70185d 5535 struct nft_set_elem *elem)
20a69341
PM		 5536{
5537 struct nft_set_dump_args *args;
5538
5539 args = container_of(iter, struct nft_set_dump_args, iter);
5540 return nf_tables_fill_setelem(args->skb, set, elem);
5541}
5542
fa803605
LZ		 5543struct nft_set_dump_ctx {
5544 const struct nft_set *set;
5545 struct nft_ctx ctx;
5546};
5547
aaa31047
PNA		 5548static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5549 const struct nft_set *set)
5550{
5551 struct nft_set_elem_catchall *catchall;
5552 u8 genmask = nft_genmask_cur(net);
5553 struct nft_set_elem elem;
5554 struct nft_set_ext *ext;
5555 int ret = 0;
5556
5557 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5558 ext = nft_set_elem_ext(set, catchall->elem);
5559 if (!nft_set_elem_active(ext, genmask) ||
5560 nft_set_elem_expired(ext))
5561 continue;
5562
5563 elem.priv = catchall->elem;
5564 ret = nf_tables_fill_setelem(skb, set, &elem);
5565 break;
5566 }
5567
5568 return ret;
5569}
5570
20a69341
PM		 5571static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5572{
fa803605 5573 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5574 struct net *net = sock_net(skb->sk);
0854db2a 5575 struct nftables_pernet *nft_net;
fa803605 5576 struct nft_table *table;
de70185d 5577 struct nft_set *set;
20a69341 5578 struct nft_set_dump_args args;
fa803605 5579 bool set_found = false;
20a69341
PM		 5580 struct nlmsghdr *nlh;
5581 struct nlattr *nest;
5582 u32 portid, seq;
fa803605 5583 int event;
20a69341 5584
fa803605 5585 rcu_read_lock();
d59d2f82 5586 nft_net = nft_pernet(net);
34002783
PNA		 5587 cb->seq = READ_ONCE(nft_net->base_seq);
5588
0854db2a 5589 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5590 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5591 dump_ctx->ctx.family != table->family)
fa803605 5592 continue;
20a69341 5593
36596dad
PNA		 5594 if (table != dump_ctx->ctx.table)
5595 continue;
20a69341 5596
36596dad
PNA		 5597 list_for_each_entry_rcu(set, &table->sets, list) {
5598 if (set == dump_ctx->set) {
5599 set_found = true;
5600 break;
fa803605 5601 }
fa803605
LZ		 5602 }
5603 break;
5604 }
5605
5606 if (!set_found) {
5607 rcu_read_unlock();
5608 return -ENOENT;
5609 }
20a69341 5610
dedb67c4 5611 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5612 portid = NETLINK_CB(cb->skb).portid;
5613 seq = cb->nlh->nlmsg_seq;
5614
19c28b13
PNA		 5615 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5616 table->family, NFNETLINK_V0, nft_base_seq(net));
5617 if (!nlh)
20a69341
PM		 5618 goto nla_put_failure;
5619
fa803605 5620 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5621 goto nla_put_failure;
5622 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5623 goto nla_put_failure;
5624
ae0be8de 5625 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5626 if (nest == NULL)
5627 goto nla_put_failure;
5628
8588ac09
PNA		 5629 args.cb = cb;
5630 args.skb = skb;
fa803605 5631 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5632 args.iter.skip = cb->args[0];
5633 args.iter.count = 0;
5634 args.iter.err = 0;
5635 args.iter.fn = nf_tables_dump_setelem;
fa803605 5636 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5637
5638 if (!args.iter.err && args.iter.count == cb->args[0])
5639 args.iter.err = nft_set_catchall_dump(net, skb, set);
fa803605 5640 rcu_read_unlock();
20a69341
PM		 5641
5642 nla_nest_end(skb, nest);
5643 nlmsg_end(skb, nlh);
5644
5645 if (args.iter.err && args.iter.err != -EMSGSIZE)
5646 return args.iter.err;
5647 if (args.iter.count == cb->args[0])
5648 return 0;
5649
5650 cb->args[0] = args.iter.count;
5651 return skb->len;
5652
5653nla_put_failure:
fa803605 5654 rcu_read_unlock();
20a69341
PM		 5655 return -ENOSPC;
5656}
5657
90fd131a
FW		 5658static int nf_tables_dump_set_start(struct netlink_callback *cb)
5659{
5660 struct nft_set_dump_ctx *dump_ctx = cb->data;
5661
5662 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5663
5664 return cb->data ? 0 : -ENOMEM;
5665}
5666
fa803605
LZ		 5667static int nf_tables_dump_set_done(struct netlink_callback *cb)
5668{
5669 kfree(cb->data);
5670 return 0;
5671}
5672
d60ce62f
AB		 5673static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5674 const struct nft_ctx *ctx, u32 seq,
5675 u32 portid, int event, u16 flags,
5676 const struct nft_set *set,
5677 const struct nft_set_elem *elem)
5678{
d60ce62f
AB		 5679 struct nlmsghdr *nlh;
5680 struct nlattr *nest;
5681 int err;
5682
dedb67c4 5683 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5684 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5685 NFNETLINK_V0, nft_base_seq(ctx->net));
5686 if (!nlh)
d60ce62f
AB		 5687 goto nla_put_failure;
5688
d60ce62f
AB		 5689 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5690 goto nla_put_failure;
5691 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5692 goto nla_put_failure;
5693
ae0be8de 5694 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5695 if (nest == NULL)
5696 goto nla_put_failure;
5697
5698 err = nf_tables_fill_setelem(skb, set, elem);
5699 if (err < 0)
5700 goto nla_put_failure;
5701
5702 nla_nest_end(skb, nest);
5703
053c095a
JB		 5704 nlmsg_end(skb, nlh);
5705 return 0;
d60ce62f
AB		 5706
5707nla_put_failure:
5708 nlmsg_trim(skb, nlh);
5709 return -1;
5710}
5711
ba0e4d99
PNA		 5712static int nft_setelem_parse_flags(const struct nft_set *set,
5713 const struct nlattr *attr, u32 *flags)
5714{
5715 if (attr == NULL)
5716 return 0;
5717
5718 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5719 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5720 return -EOPNOTSUPP;
ba0e4d99
PNA		 5721 if (!(set->flags & NFT_SET_INTERVAL) &&
5722 *flags & NFT_SET_ELEM_INTERVAL_END)
5723 return -EINVAL;
fc0ae524
PNA		 5724 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5725 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5726 return -EINVAL;
ba0e4d99
PNA		 5727
5728 return 0;
5729}
5730
20a1452c
PNA		 5731static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5732 struct nft_data *key, struct nlattr *attr)
5733{
341b6941
PNA		 5734 struct nft_data_desc desc = {
5735 .type = NFT_DATA_VALUE,
5736 .size = NFT_DATA_VALUE_MAXLEN,
5737 .len = set->klen,
5738 };
20a1452c 5739
341b6941 5740 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5741}
5742
fdb9c405
PNA		 5743static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5744 struct nft_data_desc *desc,
5745 struct nft_data *data,
5746 struct nlattr *attr)
5747{
7e6bc1f6 5748 u32 dtype;
fdb9c405 5749
7e6bc1f6
PNA		 5750 if (set->dtype == NFT_DATA_VERDICT)
5751 dtype = NFT_DATA_VERDICT;
5752 else
5753 dtype = NFT_DATA_VALUE;
5754
341b6941
PNA		 5755 desc->type = dtype;
5756 desc->size = NFT_DATA_VALUE_MAXLEN;
5757 desc->len = set->dlen;
f323ef3a 5758 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5759
341b6941 5760 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5761}
5762
aaa31047
PNA		 5763static void *nft_setelem_catchall_get(const struct net *net,
5764 const struct nft_set *set)
5765{
5766 struct nft_set_elem_catchall *catchall;
5767 u8 genmask = nft_genmask_cur(net);
5768 struct nft_set_ext *ext;
5769 void *priv = NULL;
5770
5771 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5772 ext = nft_set_elem_ext(set, catchall->elem);
5773 if (!nft_set_elem_active(ext, genmask) ||
5774 nft_set_elem_expired(ext))
5775 continue;
5776
5777 priv = catchall->elem;
5778 break;
5779 }
5780
5781 return priv;
5782}
5783
5784static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5785 struct nft_set_elem *elem, u32 flags)
5786{
5787 void *priv;
5788
5789 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5790 priv = set->ops->get(ctx->net, set, elem, flags);
5791 if (IS_ERR(priv))
5792 return PTR_ERR(priv);
5793 } else {
5794 priv = nft_setelem_catchall_get(ctx->net, set);
5795 if (!priv)
5796 return -ENOENT;
5797 }
5798 elem->priv = priv;
5799
5800 return 0;
5801}
5802
ba0e4d99
PNA		 5803static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5804 const struct nlattr *attr)
5805{
5806 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5807 struct nft_set_elem elem;
5808 struct sk_buff *skb;
5809 uint32_t flags = 0;
ba0e4d99
PNA		 5810 int err;
5811
8cb08174
JB		 5812 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5813 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5814 if (err < 0)
5815 return err;
5816
ba0e4d99
PNA		 5817 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5818 if (err < 0)
5819 return err;
5820
aaa31047
PNA		 5821 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5822 return -EINVAL;
5823
5824 if (nla[NFTA_SET_ELEM_KEY]) {
5825 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5826 nla[NFTA_SET_ELEM_KEY]);
5827 if (err < 0)
5828 return err;
5829 }
ba0e4d99 5830
7b225d0b
PNA		 5831 if (nla[NFTA_SET_ELEM_KEY_END]) {
5832 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5833 nla[NFTA_SET_ELEM_KEY_END]);
5834 if (err < 0)
5835 return err;
5836 }
5837
aaa31047
PNA		 5838 err = nft_setelem_get(ctx, set, &elem, flags);
5839 if (err < 0)
5840 return err;
ba0e4d99
PNA		 5841
5842 err = -ENOMEM;
d9adf22a 5843 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 5844 if (skb == NULL)
ee921183 5845 return err;
ba0e4d99
PNA		 5846
5847 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5848 NFT_MSG_NEWSETELEM, 0, set, &elem);
5849 if (err < 0)
ee921183 5850 goto err_fill_setelem;
ba0e4d99 5851
ee921183 5852 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 5853
ee921183 5854err_fill_setelem:
ba0e4d99 5855 kfree_skb(skb);
ee921183 5856 return err;
ba0e4d99
PNA		 5857}
5858
d9adf22a 5859/* called with rcu_read_lock held */
797d4980
PNA		 5860static int nf_tables_getsetelem(struct sk_buff *skb,
5861 const struct nfnl_info *info,
5862 const struct nlattr * const nla[])
ba0e4d99 5863{
797d4980
PNA		 5864 struct netlink_ext_ack *extack = info->extack;
5865 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 5866 u8 family = info->nfmsg->nfgen_family;
797d4980 5867 struct net *net = info->net;
e2b750d7 5868 struct nft_table *table;
ba0e4d99
PNA		 5869 struct nft_set *set;
5870 struct nlattr *attr;
5871 struct nft_ctx ctx;
5872 int rem, err = 0;
5873
e2b750d7 5874 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
92f3e96d 5875 genmask, 0);
e2b750d7
PNA		 5876 if (IS_ERR(table)) {
5877 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5878 return PTR_ERR(table);
5879 }
ba0e4d99 5880
e2b750d7 5881 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
ba0e4d99
PNA		 5882 if (IS_ERR(set))
5883 return PTR_ERR(set);
5884
e2b750d7
PNA		 5885 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5886
797d4980 5887 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 5888 struct netlink_dump_control c = {
90fd131a 5889 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 5890 .dump = nf_tables_dump_set,
5891 .done = nf_tables_dump_set_done,
d9adf22a 5892 .module = THIS_MODULE,
ba0e4d99 5893 };
90fd131a
FW		 5894 struct nft_set_dump_ctx dump_ctx = {
5895 .set = set,
5896 .ctx = ctx,
5897 };
ba0e4d99 5898
90fd131a 5899 c.data = &dump_ctx;
797d4980 5900 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 5901 }
5902
5903 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5904 return -EINVAL;
5905
5906 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5907 err = nft_get_set_elem(&ctx, set, attr);
b53c1166
PNA		 5908 if (err < 0) {
5909 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 5910 break;
b53c1166 5911 }
ba0e4d99
PNA		 5912 }
5913
5914 return err;
5915}
5916
25e94a99
PNA		 5917static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5918 const struct nft_set *set,
5919 const struct nft_set_elem *elem,
6fb721cf 5920 int event)
d60ce62f 5921{
0854db2a 5922 struct nftables_pernet *nft_net;
128ad332
PNA		 5923 struct net *net = ctx->net;
5924 u32 portid = ctx->portid;
d60ce62f 5925 struct sk_buff *skb;
6fb721cf 5926 u16 flags = 0;
d60ce62f
AB		 5927 int err;
5928
128ad332 5929 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 5930 return;
d60ce62f 5931
d60ce62f
AB		 5932 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5933 if (skb == NULL)
5934 goto err;
5935
6fb721cf
PNA		 5936 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5937 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5938
d60ce62f
AB		 5939 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5940 set, elem);
5941 if (err < 0) {
5942 kfree_skb(skb);
5943 goto err;
5944 }
5945
d59d2f82 5946 nft_net = nft_pernet(net);
0854db2a 5947 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 5948 return;
d60ce62f 5949err:
25e94a99 5950 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 5951}
5952
60319eb1
PNA		 5953static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5954 int msg_type,
5955 struct nft_set *set)
5956{
5957 struct nft_trans *trans;
5958
5959 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5960 if (trans == NULL)
5961 return NULL;
5962
5963 nft_trans_elem_set(trans) = set;
5964 return trans;
5965}
5966
a7fc9368
PNA		 5967struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5968 const struct nft_set *set,
5969 const struct nlattr *attr)
5970{
5971 struct nft_expr *expr;
5972 int err;
5973
5974 expr = nft_expr_init(ctx, attr);
5975 if (IS_ERR(expr))
5976 return expr;
5977
5978 err = -EOPNOTSUPP;
a7fc9368
PNA		 5979 if (expr->ops->type->flags & NFT_EXPR_GC) {
5980 if (set->flags & NFT_SET_TIMEOUT)
5981 goto err_set_elem_expr;
5982 if (!set->ops->gc_init)
5983 goto err_set_elem_expr;
5984 set->ops->gc_init(set);
5985 }
5986
5987 return expr;
5988
5989err_set_elem_expr:
5990 nft_expr_destroy(ctx, expr);
5991 return ERR_PTR(err);
5992}
5993
34aae2c2
PNA		 5994static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
5995{
5996 len += nft_set_ext_types[id].len;
5997 if (len > tmpl->ext_len[id] ||
5998 len > U8_MAX)
5999 return -1;
6000
6001 return 0;
6002}
6003
6004static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
6005 void *to, const void *from, u32 len)
6006{
6007 if (nft_set_ext_check(tmpl, id, len) < 0)
6008 return -1;
6009
6010 memcpy(to, from, len);
6011
6012 return 0;
6013}
6014
22fe54d5
PM		 6015void *nft_set_elem_init(const struct nft_set *set,
6016 const struct nft_set_ext_tmpl *tmpl,
7b225d0b
PNA		 6017 const u32 *key, const u32 *key_end,
6018 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 6019{
6020 struct nft_set_ext *ext;
6021 void *elem;
6022
6023 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
6024 if (elem == NULL)
34aae2c2 6025 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 6026
6027 ext = nft_set_elem_ext(set, elem);
6028 nft_set_ext_init(ext, tmpl);
6029
34aae2c2
PNA		 6030 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
6031 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
6032 nft_set_ext_key(ext), key, set->klen) < 0)
6033 goto err_ext_check;
6034
6035 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
6036 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
6037 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
6038 goto err_ext_check;
6039
6040 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6041 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
6042 nft_set_ext_data(ext), data, set->dlen) < 0)
6043 goto err_ext_check;
6044
79ebb5bb
LGL		 6045 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
6046 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
6047 if (expiration == 0)
6048 *nft_set_ext_expiration(ext) += timeout;
6049 }
c3e1b005
PM		 6050 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
6051 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 6052
6053 return elem;
34aae2c2
PNA		 6054
6055err_ext_check:
6056 kfree(elem);
6057
6058 return ERR_PTR(-EINVAL);
fe2811eb
PM		 6059}
6060
563125a7
PNA		 6061static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6062 struct nft_expr *expr)
475beb9c
PNA		 6063{
6064 if (expr->ops->destroy_clone) {
6065 expr->ops->destroy_clone(ctx, expr);
6066 module_put(expr->ops->type->owner);
6067 } else {
6068 nf_tables_expr_destroy(ctx, expr);
6069 }
6070}
6071
563125a7
PNA		 6072static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6073 struct nft_set_elem_expr *elem_expr)
6074{
6075 struct nft_expr *expr;
6076 u32 size;
6077
6078 nft_setelem_expr_foreach(expr, elem_expr, size)
6079 __nft_set_elem_expr_destroy(ctx, expr);
6080}
6081
628bd3e4 6082/* Drop references and destroy. Called from gc, dynset and abort path. */
61f9e292
LZ		 6083void nft_set_elem_destroy(const struct nft_set *set, void *elem,
6084 bool destroy_expr)
61edafbb
PM		 6085{
6086 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
3453c927
PNA		 6087 struct nft_ctx ctx = {
6088 .net = read_pnet(&set->net),
6089 .family = set->table->family,
6090 };
61edafbb 6091
59105446 6092 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 6093 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 6094 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 6095 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 6096 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
371ebcbb 6097
8aeff920
PNA		 6098 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6099 (*nft_set_ext_obj(ext))->use--;
61edafbb
PM		 6100 kfree(elem);
6101}
6102EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
6103
628bd3e4
PNA		 6104/* Destroy element. References have been already dropped in the preparation
6105 * path via nft_setelem_data_deactivate().
59105446 6106 */
628bd3e4
PNA		 6107void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
6108 const struct nft_set *set, void *elem)
59105446
PNA		 6109{
6110 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
6111
563125a7 6112 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 6113 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
6114
59105446
PNA		 6115 kfree(elem);
6116}
6117
fca05d4d
PNA		 6118int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
6119 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 6120{
6121 struct nft_expr *expr;
6122 int err, i, k;
6123
6124 for (i = 0; i < set->num_exprs; i++) {
42193ffd 6125 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 6126 if (!expr)
6127 goto err_expr;
6128
6129 err = nft_expr_clone(expr, set->exprs[i]);
6130 if (err < 0) {
c485c35f 6131 kfree(expr);
8cfd9b0f
PNA		 6132 goto err_expr;
6133 }
6134 expr_array[i] = expr;
6135 }
6136
6137 return 0;
6138
6139err_expr:
161b838e
CIK		 6140 for (k = i - 1; k >= 0; k--)
6141 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 6142
6143 return -ENOMEM;
6144}
6145
4d8f9065 6146static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 6147 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 6148 const struct nft_set_ext *ext,
6149 struct nft_expr *expr_array[],
6150 u32 num_exprs)
563125a7
PNA		 6151{
6152 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 6153 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 6154 struct nft_expr *expr;
6155 int i, err;
6156
34aae2c2
PNA		 6157 if (num_exprs == 0)
6158 return 0;
6159
6160 for (i = 0; i < num_exprs; i++)
6161 len += expr_array[i]->ops->size;
6162
6163 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
6164 return -EINVAL;
6165
4d8f9065
PNA		 6166 for (i = 0; i < num_exprs; i++) {
6167 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
6168 err = nft_expr_clone(expr, expr_array[i]);
6169 if (err < 0)
6170 goto err_elem_expr_setup;
6171
6172 elem_expr->size += expr_array[i]->ops->size;
6173 nft_expr_destroy(ctx, expr_array[i]);
6174 expr_array[i] = NULL;
6175 }
6176
6177 return 0;
6178
6179err_elem_expr_setup:
6180 for (; i < num_exprs; i++) {
6181 nft_expr_destroy(ctx, expr_array[i]);
6182 expr_array[i] = NULL;
6183 }
563125a7 6184
4d8f9065 6185 return -ENOMEM;
563125a7
PNA		 6186}
6187
aaa31047
PNA		 6188struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
6189 const struct nft_set *set)
6190{
6191 struct nft_set_elem_catchall *catchall;
6192 u8 genmask = nft_genmask_cur(net);
6193 struct nft_set_ext *ext;
6194
6195 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6196 ext = nft_set_elem_ext(set, catchall->elem);
6197 if (nft_set_elem_active(ext, genmask) &&
6198 !nft_set_elem_expired(ext))
6199 return ext;
6200 }
6201
6202 return NULL;
6203}
6204EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
6205
6206void *nft_set_catchall_gc(const struct nft_set *set)
6207{
6208 struct nft_set_elem_catchall *catchall, *next;
6209 struct nft_set_ext *ext;
6210 void *elem = NULL;
6211
6212 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6213 ext = nft_set_elem_ext(set, catchall->elem);
6214
6215 if (!nft_set_elem_expired(ext) ||
6216 nft_set_elem_mark_busy(ext))
6217 continue;
6218
6219 elem = catchall->elem;
6220 list_del_rcu(&catchall->list);
6221 kfree_rcu(catchall, rcu);
6222 break;
6223 }
6224
6225 return elem;
6226}
6227EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
6228
6229static int nft_setelem_catchall_insert(const struct net *net,
6230 struct nft_set *set,
6231 const struct nft_set_elem *elem,
6232 struct nft_set_ext **pext)
6233{
6234 struct nft_set_elem_catchall *catchall;
6235 u8 genmask = nft_genmask_next(net);
6236 struct nft_set_ext *ext;
6237
6238 list_for_each_entry(catchall, &set->catchall_list, list) {
6239 ext = nft_set_elem_ext(set, catchall->elem);
6240 if (nft_set_elem_active(ext, genmask)) {
6241 *pext = ext;
6242 return -EEXIST;
6243 }
6244 }
6245
6246 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
6247 if (!catchall)
6248 return -ENOMEM;
6249
6250 catchall->elem = elem->priv;
6251 list_add_tail_rcu(&catchall->list, &set->catchall_list);
6252
6253 return 0;
6254}
6255
6256static int nft_setelem_insert(const struct net *net,
6257 struct nft_set *set,
6258 const struct nft_set_elem *elem,
6259 struct nft_set_ext **ext, unsigned int flags)
6260{
6261 int ret;
6262
6263 if (flags & NFT_SET_ELEM_CATCHALL)
6264 ret = nft_setelem_catchall_insert(net, set, elem, ext);
6265 else
6266 ret = set->ops->insert(net, set, elem, ext);
6267
6268 return ret;
6269}
6270
6271static bool nft_setelem_is_catchall(const struct nft_set *set,
6272 const struct nft_set_elem *elem)
6273{
6274 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6275
6276 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
6277 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
6278 return true;
6279
6280 return false;
6281}
6282
6283static void nft_setelem_activate(struct net *net, struct nft_set *set,
6284 struct nft_set_elem *elem)
6285{
6286 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6287
6288 if (nft_setelem_is_catchall(set, elem)) {
6289 nft_set_elem_change_active(net, set, ext);
6290 nft_set_elem_clear_busy(ext);
6291 } else {
6292 set->ops->activate(net, set, elem);
6293 }
6294}
6295
6296static int nft_setelem_catchall_deactivate(const struct net *net,
6297 struct nft_set *set,
6298 struct nft_set_elem *elem)
6299{
6300 struct nft_set_elem_catchall *catchall;
6301 struct nft_set_ext *ext;
6302
6303 list_for_each_entry(catchall, &set->catchall_list, list) {
6304 ext = nft_set_elem_ext(set, catchall->elem);
6305 if (!nft_is_active(net, ext) ||
6306 nft_set_elem_mark_busy(ext))
6307 continue;
6308
6309 kfree(elem->priv);
6310 elem->priv = catchall->elem;
6311 nft_set_elem_change_active(net, set, ext);
6312 return 0;
6313 }
6314
6315 return -ENOENT;
6316}
6317
6318static int __nft_setelem_deactivate(const struct net *net,
6319 struct nft_set *set,
6320 struct nft_set_elem *elem)
6321{
6322 void *priv;
6323
6324 priv = set->ops->deactivate(net, set, elem);
6325 if (!priv)
6326 return -ENOENT;
6327
6328 kfree(elem->priv);
6329 elem->priv = priv;
6330 set->ndeact++;
6331
6332 return 0;
6333}
6334
6335static int nft_setelem_deactivate(const struct net *net,
6336 struct nft_set *set,
6337 struct nft_set_elem *elem, u32 flags)
6338{
6339 int ret;
6340
6341 if (flags & NFT_SET_ELEM_CATCHALL)
6342 ret = nft_setelem_catchall_deactivate(net, set, elem);
6343 else
6344 ret = __nft_setelem_deactivate(net, set, elem);
6345
6346 return ret;
6347}
6348
6349static void nft_setelem_catchall_remove(const struct net *net,
6350 const struct nft_set *set,
6351 const struct nft_set_elem *elem)
6352{
6353 struct nft_set_elem_catchall *catchall, *next;
6354
6355 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6356 if (catchall->elem == elem->priv) {
6357 list_del_rcu(&catchall->list);
ae089831 6358 kfree_rcu(catchall, rcu);
aaa31047
PNA		 6359 break;
6360 }
6361 }
6362}
6363
6364static void nft_setelem_remove(const struct net *net,
6365 const struct nft_set *set,
6366 const struct nft_set_elem *elem)
6367{
6368 if (nft_setelem_is_catchall(set, elem))
6369 nft_setelem_catchall_remove(net, set, elem);
6370 else
6371 set->ops->remove(net, set, elem);
6372}
6373
88cccd90
PNA		 6374static bool nft_setelem_valid_key_end(const struct nft_set *set,
6375 struct nlattr **nla, u32 flags)
6376{
6377 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
6378 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
6379 if (flags & NFT_SET_ELEM_INTERVAL_END)
6380 return false;
96df8360
PNA		 6381
6382 if (nla[NFTA_SET_ELEM_KEY_END] &&
6383 flags & NFT_SET_ELEM_CATCHALL)
88cccd90
PNA		 6384 return false;
6385 } else {
6386 if (nla[NFTA_SET_ELEM_KEY_END])
6387 return false;
6388 }
6389
6390 return true;
6391}
6392
60319eb1 6393static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 6394 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 6395{
8cfd9b0f 6396 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 6397 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 6398 u8 genmask = nft_genmask_next(ctx->net);
664899e8 6399 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 6400 struct nft_set_ext_tmpl tmpl;
c016c7e4 6401 struct nft_set_ext *ext, *ext2;
20a69341
PM		 6402 struct nft_set_elem elem;
6403 struct nft_set_binding *binding;
8aeff920 6404 struct nft_object *obj = NULL;
68e942e8 6405 struct nft_userdata *udata;
20a1452c 6406 struct nft_data_desc desc;
20a69341 6407 enum nft_registers dreg;
60319eb1 6408 struct nft_trans *trans;
c3e1b005 6409 u64 timeout;
79ebb5bb 6410 u64 expiration;
8cfd9b0f 6411 int err, i;
68e942e8 6412 u8 ulen;
20a69341 6413
8cb08174
JB		 6414 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6415 nft_set_elem_policy, NULL);
20a69341
PM		 6416 if (err < 0)
6417 return err;
6418
fe2811eb
PM		 6419 nft_set_ext_prepare(&tmpl);
6420
0e9091d6
PNA		 6421 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6422 if (err < 0)
6423 return err;
aaa31047 6424
d4eb7e39
PNA		 6425 if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
6426 (!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
aaa31047
PNA		 6427 return -EINVAL;
6428
c39ba4de
PNA		 6429 if (flags != 0) {
6430 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6431 if (err < 0)
6432 return err;
6433 }
20a69341
PM		 6434
6435 if (set->flags & NFT_SET_MAP) {
6436 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 6437 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 6438 return -EINVAL;
6439 } else {
6440 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6441 return -EINVAL;
6442 }
6443
5a2f3dc3
PNA		 6444 if (set->flags & NFT_SET_OBJECT) {
6445 if (!nla[NFTA_SET_ELEM_OBJREF] &&
6446 !(flags & NFT_SET_ELEM_INTERVAL_END))
6447 return -EINVAL;
6448 } else {
6449 if (nla[NFTA_SET_ELEM_OBJREF])
6450 return -EINVAL;
6451 }
6452
88cccd90
PNA		 6453 if (!nft_setelem_valid_key_end(set, nla, flags))
6454 return -EINVAL;
6455
bffc124b
PNA		 6456 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
6457 (nla[NFTA_SET_ELEM_DATA] ||
6458 nla[NFTA_SET_ELEM_OBJREF] ||
6459 nla[NFTA_SET_ELEM_TIMEOUT] ||
6460 nla[NFTA_SET_ELEM_EXPIRATION] ||
6461 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 6462 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 6463 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 6464 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 6465 return -EINVAL;
6466
c3e1b005
PM		 6467 timeout = 0;
6468 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6469 if (!(set->flags & NFT_SET_TIMEOUT))
6470 return -EINVAL;
8e1102d5
FW		 6471 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6472 &timeout);
6473 if (err)
6474 return err;
33c7aba0
PNA		 6475 } else if (set->flags & NFT_SET_TIMEOUT &&
6476 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
123b9961 6477 timeout = READ_ONCE(set->timeout);
c3e1b005
PM		 6478 }
6479
79ebb5bb
LGL		 6480 expiration = 0;
6481 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6482 if (!(set->flags & NFT_SET_TIMEOUT))
6483 return -EINVAL;
6484 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6485 &expiration);
6486 if (err)
6487 return err;
6488 }
6489
8cfd9b0f
PNA		 6490 if (nla[NFTA_SET_ELEM_EXPR]) {
6491 struct nft_expr *expr;
6492
664899e8 6493 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 6494 return -EOPNOTSUPP;
6495
40944452
PNA		 6496 expr = nft_set_elem_expr_alloc(ctx, set,
6497 nla[NFTA_SET_ELEM_EXPR]);
6498 if (IS_ERR(expr))
6499 return PTR_ERR(expr);
65038428 6500
8cfd9b0f 6501 expr_array[0] = expr;
664899e8 6502 num_exprs = 1;
65038428 6503
664899e8 6504 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 6505 err = -EOPNOTSUPP;
65038428 6506 goto err_set_elem_expr;
8cfd9b0f 6507 }
48b0ae04
PNA		 6508 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6509 struct nft_expr *expr;
6510 struct nlattr *tmp;
6511 int left;
65038428 6512
48b0ae04
PNA		 6513 i = 0;
6514 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 6515 if (i == NFT_SET_EXPR_MAX ||
6516 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 6517 err = -E2BIG;
6518 goto err_set_elem_expr;
6519 }
6520 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6521 err = -EINVAL;
6522 goto err_set_elem_expr;
6523 }
6524 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6525 if (IS_ERR(expr)) {
6526 err = PTR_ERR(expr);
6527 goto err_set_elem_expr;
6528 }
6529 expr_array[i] = expr;
664899e8 6530 num_exprs++;
48b0ae04 6531
664899e8 6532 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6533 err = -EOPNOTSUPP;
6534 goto err_set_elem_expr;
6535 }
6536 i++;
6537 }
664899e8 6538 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6539 err = -EOPNOTSUPP;
65038428 6540 goto err_set_elem_expr;
48b0ae04 6541 }
33c7aba0
PNA		 6542 } else if (set->num_exprs > 0 &&
6543 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
8cfd9b0f
PNA		 6544 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6545 if (err < 0)
6546 goto err_set_elem_expr_clone;
664899e8
PNA		 6547
6548 num_exprs = set->num_exprs;
40944452
PNA		 6549 }
6550
aaa31047
PNA		 6551 if (nla[NFTA_SET_ELEM_KEY]) {
6552 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6553 nla[NFTA_SET_ELEM_KEY]);
6554 if (err < 0)
6555 goto err_set_elem_expr;
20a69341 6556
c39ba4de
PNA		 6557 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6558 if (err < 0)
6559 goto err_parse_key;
aaa31047 6560 }
7b225d0b
PNA		 6561
6562 if (nla[NFTA_SET_ELEM_KEY_END]) {
6563 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6564 nla[NFTA_SET_ELEM_KEY_END]);
6565 if (err < 0)
6566 goto err_parse_key;
6567
c39ba4de
PNA		 6568 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6569 if (err < 0)
6570 goto err_parse_key_end;
7b225d0b
PNA		 6571 }
6572
c3e1b005 6573 if (timeout > 0) {
c39ba4de
PNA		 6574 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6575 if (err < 0)
6576 goto err_parse_key_end;
6577
123b9961 6578 if (timeout != READ_ONCE(set->timeout)) {
c39ba4de
PNA		 6579 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6580 if (err < 0)
6581 goto err_parse_key_end;
6582 }
c3e1b005 6583 }
fe2811eb 6584
664899e8
PNA		 6585 if (num_exprs) {
6586 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6587 size += expr_array[i]->ops->size;
6588
c39ba4de
PNA		 6589 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6590 sizeof(struct nft_set_elem_expr) + size);
6591 if (err < 0)
6592 goto err_parse_key_end;
563125a7 6593 }
40944452 6594
8aeff920 6595 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6596 obj = nft_obj_lookup(ctx->net, ctx->table,
6597 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6598 set->objtype, genmask);
8aeff920
PNA		 6599 if (IS_ERR(obj)) {
6600 err = PTR_ERR(obj);
7b225d0b 6601 goto err_parse_key_end;
8aeff920 6602 }
c39ba4de
PNA		 6603 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6604 if (err < 0)
6605 goto err_parse_key_end;
8aeff920
PNA		 6606 }
6607
20a69341 6608 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6609 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6610 nla[NFTA_SET_ELEM_DATA]);
20a69341 6611 if (err < 0)
7b225d0b 6612 goto err_parse_key_end;
20a69341 6613
20a69341
PM		 6614 dreg = nft_type_to_reg(set->dtype);
6615 list_for_each_entry(binding, &set->bindings, list) {
6616 struct nft_ctx bind_ctx = {
58c78e10 6617 .net = ctx->net,
36596dad 6618 .family = ctx->family,
20a69341 6619 .table = ctx->table,
7c95f6d8 6620 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6621 };
6622
11113e19
PM		 6623 if (!(binding->flags & NFT_SET_MAP))
6624 continue;
6625
1ec10212 6626 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6627 &elem.data.val,
20a1452c 6628 desc.type, desc.len);
20a69341 6629 if (err < 0)
7b225d0b 6630 goto err_parse_data;
a654de8f 6631
20a1452c 6632 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6633 (elem.data.val.verdict.code == NFT_GOTO ||
6634 elem.data.val.verdict.code == NFT_JUMP))
00c320f9 6635 nft_validate_state_update(ctx->table,
a654de8f 6636 NFT_VALIDATE_NEED);
20a69341 6637 }
fe2811eb 6638
c39ba4de
PNA		 6639 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6640 if (err < 0)
6641 goto err_parse_data;
20a69341
PM		 6642 }
6643
68e942e8
PM		 6644 /* The full maximum length of userdata can exceed the maximum
6645 * offset value (U8_MAX) for following extensions, therefor it
6646 * must be the last extension added.
6647 */
6648 ulen = 0;
6649 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6650 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6651 if (ulen > 0) {
6652 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6653 ulen);
6654 if (err < 0)
6655 goto err_parse_data;
6656 }
68e942e8
PM		 6657 }
6658
7b225d0b 6659 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6660 elem.key_end.val.data, elem.data.val.data,
33758c89 6661 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6662 if (IS_ERR(elem.priv)) {
6663 err = PTR_ERR(elem.priv);
7b225d0b 6664 goto err_parse_data;
34aae2c2 6665 }
fe2811eb
PM		 6666
6667 ext = nft_set_elem_ext(set, elem.priv);
6668 if (flags)
6669 *nft_set_ext_flags(ext) = flags;
34aae2c2 6670
d6b47866
PNA		 6671 if (obj) {
6672 *nft_set_ext_obj(ext) = obj;
6673 obj->use++;
6674 }
68e942e8 6675 if (ulen > 0) {
34aae2c2
PNA		 6676 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6677 err = -EINVAL;
d6b47866 6678 goto err_elem_free;
34aae2c2 6679 }
68e942e8
PM		 6680 udata = nft_set_ext_userdata(ext);
6681 udata->len = ulen - 1;
6682 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6683 }
34aae2c2 6684 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6685 if (err < 0)
34aae2c2 6686 goto err_elem_free;
fe2811eb 6687
60319eb1 6688 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6689 if (trans == NULL) {
6690 err = -ENOMEM;
34aae2c2 6691 goto err_elem_free;
4d8f9065 6692 }
60319eb1 6693
69086658 6694 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
aaa31047
PNA		 6695
6696 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
c016c7e4
PNA		 6697 if (err) {
6698 if (err == -EEXIST) {
9744a6fc
PNA		 6699 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6700 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6701 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6702 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6703 goto err_element_clash;
8aeff920
PNA		 6704 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6705 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6706 memcmp(nft_set_ext_data(ext),
6707 nft_set_ext_data(ext2), set->dlen) != 0) ||
6708 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6709 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6710 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6711 goto err_element_clash;
c016c7e4
PNA		 6712 else if (!(nlmsg_flags & NLM_F_EXCL))
6713 err = 0;
8c2d45b2
PNA		 6714 } else if (err == -ENOTEMPTY) {
6715 /* ENOTEMPTY reports overlapping between this element
6716 * and an existing one.
6717 */
6718 err = -EEXIST;
c016c7e4 6719 }
7b225d0b 6720 goto err_element_clash;
c016c7e4 6721 }
20a69341 6722
aaa31047 6723 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
35d0ac90
PNA		 6724 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
6725 err = -ENFILE;
7b225d0b 6726 goto err_set_full;
35d0ac90
PNA		 6727 }
6728
60319eb1 6729 nft_trans_elem(trans) = elem;
0854db2a 6730 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6731 return 0;
6732
7b225d0b 6733err_set_full:
aaa31047 6734 nft_setelem_remove(ctx->net, set, &elem);
7b225d0b 6735err_element_clash:
60319eb1 6736 kfree(trans);
34aae2c2 6737err_elem_free:
628bd3e4 6738 nft_set_elem_destroy(set, elem.priv, true);
7b225d0b 6739err_parse_data:
20a69341 6740 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6741 nft_data_release(&elem.data.val, desc.type);
7b225d0b
PNA		 6742err_parse_key_end:
6743 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6744err_parse_key:
20a1452c 6745 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6746err_set_elem_expr:
664899e8 6747 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6748 nft_expr_destroy(ctx, expr_array[i]);
6749err_set_elem_expr_clone:
20a69341
PM		 6750 return err;
6751}
6752
7dab8ee3
PNA		 6753static int nf_tables_newsetelem(struct sk_buff *skb,
6754 const struct nfnl_info *info,
6755 const struct nlattr * const nla[])
20a69341 6756{
7dab8ee3
PNA		 6757 struct netlink_ext_ack *extack = info->extack;
6758 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6759 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6760 struct net *net = info->net;
20a69341 6761 const struct nlattr *attr;
e2b750d7 6762 struct nft_table *table;
20a69341
PM		 6763 struct nft_set *set;
6764 struct nft_ctx ctx;
a654de8f 6765 int rem, err;
20a69341 6766
7d5570ca
PNA		 6767 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6768 return -EINVAL;
6769
e2b750d7
PNA		 6770 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6771 genmask, NETLINK_CB(skb).portid);
6772 if (IS_ERR(table)) {
6773 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6774 return PTR_ERR(table);
6775 }
20a69341 6776
e2b750d7 6777 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17
PNA		 6778 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6779 if (IS_ERR(set))
6780 return PTR_ERR(set);
958bee14 6781
c88c535b
PNA		 6782 if (!list_empty(&set->bindings) &&
6783 (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS)))
20a69341
PM		 6784 return -EBUSY;
6785
e2b750d7
PNA		 6786 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6787
20a69341 6788 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6789 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6790 if (err < 0) {
6791 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6792 return err;
b53c1166 6793 }
20a69341 6794 }
a654de8f 6795
00c320f9 6796 if (table->validate_state == NFT_VALIDATE_DO)
e2b750d7 6797 return nft_table_validate(net, table);
a654de8f
PNA		 6798
6799 return 0;
20a69341
PM		 6800}
6801
59105446
PNA		 6802/**
6803 * nft_data_hold - hold a nft_data item
6804 *
6805 * @data: struct nft_data to release
6806 * @type: type of data
6807 *
6808 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6809 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6810 * NFT_GOTO verdicts. This function must be called on active data objects
6811 * from the second phase of the commit protocol.
6812 */
bb7b40ae 6813void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 6814{
d0e2c7de 6815 struct nft_chain *chain;
d0e2c7de 6816
59105446
PNA		 6817 if (type == NFT_DATA_VERDICT) {
6818 switch (data->verdict.code) {
6819 case NFT_JUMP:
6820 case NFT_GOTO:
d0e2c7de
PNA		 6821 chain = data->verdict.chain;
6822 chain->use++;
59105446
PNA		 6823 break;
6824 }
6825 }
6826}
6827
f8bb7889
PNA		 6828static void nft_setelem_data_activate(const struct net *net,
6829 const struct nft_set *set,
6830 struct nft_set_elem *elem)
59105446
PNA		 6831{
6832 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6833
6834 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6835 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6836 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6837 (*nft_set_ext_obj(ext))->use++;
6838}
6839
f8bb7889
PNA		 6840static void nft_setelem_data_deactivate(const struct net *net,
6841 const struct nft_set *set,
6842 struct nft_set_elem *elem)
59105446
PNA		 6843{
6844 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6845
6846 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6847 nft_data_release(nft_set_ext_data(ext), set->dtype);
6848 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6849 (*nft_set_ext_obj(ext))->use--;
6850}
6851
60319eb1 6852static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 6853 const struct nlattr *attr)
6854{
6855 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 6856 struct nft_set_ext_tmpl tmpl;
20a69341 6857 struct nft_set_elem elem;
3971ca14 6858 struct nft_set_ext *ext;
60319eb1 6859 struct nft_trans *trans;
3971ca14 6860 u32 flags = 0;
20a69341
PM		 6861 int err;
6862
8cb08174
JB		 6863 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6864 nft_set_elem_policy, NULL);
20a69341 6865 if (err < 0)
20a1452c 6866 return err;
20a69341 6867
aaa31047
PNA		 6868 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6869 if (err < 0)
6870 return err;
6871
6872 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 6873 return -EINVAL;
20a69341 6874
88cccd90
PNA		 6875 if (!nft_setelem_valid_key_end(set, nla, flags))
6876 return -EINVAL;
6877
3971ca14
PNA		 6878 nft_set_ext_prepare(&tmpl);
6879
c39ba4de
PNA		 6880 if (flags != 0) {
6881 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6882 if (err < 0)
6883 return err;
6884 }
3971ca14 6885
aaa31047
PNA		 6886 if (nla[NFTA_SET_ELEM_KEY]) {
6887 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6888 nla[NFTA_SET_ELEM_KEY]);
6889 if (err < 0)
6890 return err;
20a69341 6891
c39ba4de
PNA		 6892 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6893 if (err < 0)
6894 goto fail_elem;
aaa31047 6895 }
3971ca14 6896
7b225d0b
PNA		 6897 if (nla[NFTA_SET_ELEM_KEY_END]) {
6898 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6899 nla[NFTA_SET_ELEM_KEY_END]);
6900 if (err < 0)
c39ba4de 6901 goto fail_elem;
7b225d0b 6902
c39ba4de
PNA		 6903 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6904 if (err < 0)
6905 goto fail_elem_key_end;
7b225d0b
PNA		 6906 }
6907
3971ca14 6908 err = -ENOMEM;
7b225d0b
PNA		 6909 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6910 elem.key_end.val.data, NULL, 0, 0,
33758c89 6911 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6912 if (IS_ERR(elem.priv)) {
6913 err = PTR_ERR(elem.priv);
c39ba4de 6914 goto fail_elem_key_end;
34aae2c2 6915 }
3971ca14
PNA		 6916
6917 ext = nft_set_elem_ext(set, elem.priv);
6918 if (flags)
6919 *nft_set_ext_flags(ext) = flags;
6920
60319eb1 6921 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 6922 if (trans == NULL)
6923 goto fail_trans;
20a69341 6924
aaa31047
PNA		 6925 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6926 if (err < 0)
20a1452c 6927 goto fail_ops;
cc02e457 6928
f8bb7889 6929 nft_setelem_data_deactivate(ctx->net, set, &elem);
59105446 6930
60319eb1 6931 nft_trans_elem(trans) = elem;
0854db2a 6932 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 6933 return 0;
cc02e457 6934
20a1452c 6935fail_ops:
cc02e457 6936 kfree(trans);
20a1452c 6937fail_trans:
3971ca14 6938 kfree(elem.priv);
c39ba4de
PNA		 6939fail_elem_key_end:
6940 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 6941fail_elem:
6942 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 6943 return err;
6944}
6945
e6ba7cb6
PNA		 6946static int nft_setelem_flush(const struct nft_ctx *ctx,
6947 struct nft_set *set,
6948 const struct nft_set_iter *iter,
6949 struct nft_set_elem *elem)
8411b644
PNA		 6950{
6951 struct nft_trans *trans;
6952 int err;
6953
6954 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6955 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6956 if (!trans)
6957 return -ENOMEM;
6958
1ba1c414 6959 if (!set->ops->flush(ctx->net, set, elem->priv)) {
8411b644
PNA		 6960 err = -ENOENT;
6961 goto err1;
6962 }
b2c11e4b 6963 set->ndeact++;
8411b644 6964
f8bb7889 6965 nft_setelem_data_deactivate(ctx->net, set, elem);
de70185d
PNA		 6966 nft_trans_elem_set(trans) = set;
6967 nft_trans_elem(trans) = *elem;
0854db2a 6968 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 6969
6970 return 0;
6971err1:
6972 kfree(trans);
6973 return err;
6974}
6975
aaa31047
PNA		 6976static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6977 struct nft_set *set,
6978 struct nft_set_elem *elem)
6979{
6980 struct nft_trans *trans;
6981
6982 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6983 sizeof(struct nft_trans_elem), GFP_KERNEL);
6984 if (!trans)
6985 return -ENOMEM;
6986
6987 nft_setelem_data_deactivate(ctx->net, set, elem);
6988 nft_trans_elem_set(trans) = set;
6989 nft_trans_elem(trans) = *elem;
6990 nft_trans_commit_list_add_tail(ctx->net, trans);
6991
6992 return 0;
6993}
6994
6995static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6996 struct nft_set *set)
6997{
6998 u8 genmask = nft_genmask_next(ctx->net);
6999 struct nft_set_elem_catchall *catchall;
7000 struct nft_set_elem elem;
7001 struct nft_set_ext *ext;
7002 int ret = 0;
7003
7004 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
7005 ext = nft_set_elem_ext(set, catchall->elem);
7006 if (!nft_set_elem_active(ext, genmask) ||
7007 nft_set_elem_mark_busy(ext))
7008 continue;
7009
7010 elem.priv = catchall->elem;
7011 ret = __nft_set_catchall_flush(ctx, set, &elem);
7012 if (ret < 0)
7013 break;
7014 }
7015
7016 return ret;
7017}
7018
e6ba7cb6
PNA		 7019static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
7020{
7021 struct nft_set_iter iter = {
7022 .genmask = genmask,
7023 .fn = nft_setelem_flush,
7024 };
7025
7026 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 7027 if (!iter.err)
7028 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 7029
7030 return iter.err;
7031}
7032
7dab8ee3
PNA		 7033static int nf_tables_delsetelem(struct sk_buff *skb,
7034 const struct nfnl_info *info,
7035 const struct nlattr * const nla[])
20a69341 7036{
7dab8ee3
PNA		 7037 struct netlink_ext_ack *extack = info->extack;
7038 u8 genmask = nft_genmask_next(info->net);
e2b750d7 7039 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7040 struct net *net = info->net;
20a69341 7041 const struct nlattr *attr;
e2b750d7 7042 struct nft_table *table;
20a69341
PM		 7043 struct nft_set *set;
7044 struct nft_ctx ctx;
60319eb1 7045 int rem, err = 0;
20a69341 7046
e2b750d7
PNA		 7047 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
7048 genmask, NETLINK_CB(skb).portid);
7049 if (IS_ERR(table)) {
7050 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
7051 return PTR_ERR(table);
7052 }
20a69341 7053
e2b750d7 7054 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
20a69341
PM		 7055 if (IS_ERR(set))
7056 return PTR_ERR(set);
c88c535b
PNA		 7057
7058 if (!list_empty(&set->bindings) &&
7059 (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS)))
20a69341
PM		 7060 return -EBUSY;
7061
e2b750d7
PNA		 7062 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7063
e6ba7cb6
PNA		 7064 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
7065 return nft_set_flush(&ctx, set, genmask);
8411b644 7066
20a69341
PM		 7067 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7068 err = nft_del_setelem(&ctx, set, attr);
f80a612d
FFM		 7069 if (err == -ENOENT &&
7070 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
7071 continue;
7072
b53c1166
PNA		 7073 if (err < 0) {
7074 NL_SET_BAD_ATTR(extack, attr);
60319eb1 7075 break;
b53c1166 7076 }
20a69341 7077 }
60319eb1 7078 return err;
20a69341
PM		 7079}
7080
cfed7e1b
PM		 7081void nft_set_gc_batch_release(struct rcu_head *rcu)
7082{
7083 struct nft_set_gc_batch *gcb;
7084 unsigned int i;
7085
7086 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
7087 for (i = 0; i < gcb->head.cnt; i++)
61f9e292 7088 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
cfed7e1b
PM		 7089 kfree(gcb);
7090}
cfed7e1b
PM		 7091
7092struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
7093 gfp_t gfp)
7094{
7095 struct nft_set_gc_batch *gcb;
7096
7097 gcb = kzalloc(sizeof(*gcb), gfp);
7098 if (gcb == NULL)
7099 return gcb;
7100 gcb->head.set = set;
7101 return gcb;
7102}
cfed7e1b 7103
e5009240
PNA		 7104/*
7105 * Stateful objects
7106 */
7107
7108/**
7109 * nft_register_obj- register nf_tables stateful object type
3db86c39 7110 * @obj_type: object type
e5009240
PNA		 7111 *
7112 * Registers the object type for use with nf_tables. Returns zero on
7113 * success or a negative errno code otherwise.
7114 */
7115int nft_register_obj(struct nft_object_type *obj_type)
7116{
7117 if (obj_type->type == NFT_OBJECT_UNSPEC)
7118 return -EINVAL;
7119
7120 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7121 list_add_rcu(&obj_type->list, &nf_tables_objects);
7122 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7123 return 0;
7124}
7125EXPORT_SYMBOL_GPL(nft_register_obj);
7126
7127/**
7128 * nft_unregister_obj - unregister nf_tables object type
3db86c39 7129 * @obj_type: object type
e5009240
PNA		 7130 *
7131 * Unregisters the object type for use with nf_tables.
7132 */
7133void nft_unregister_obj(struct nft_object_type *obj_type)
7134{
7135 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7136 list_del_rcu(&obj_type->list);
7137 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7138}
7139EXPORT_SYMBOL_GPL(nft_unregister_obj);
7140
4d44175a
FW		 7141struct nft_object *nft_obj_lookup(const struct net *net,
7142 const struct nft_table *table,
cac20fcd
PNA		 7143 const struct nlattr *nla, u32 objtype,
7144 u8 genmask)
e5009240 7145{
4d44175a
FW		 7146 struct nft_object_hash_key k = { .table = table };
7147 char search[NFT_OBJ_MAXNAMELEN];
7148 struct rhlist_head *tmp, *list;
e5009240
PNA		 7149 struct nft_object *obj;
7150
872f6903 7151 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 7152 k.name = search;
7153
7154 WARN_ON_ONCE(!rcu_read_lock_held() &&
7155 !lockdep_commit_lock_is_held(net));
7156
7157 rcu_read_lock();
7158 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
7159 if (!list)
7160 goto out;
7161
7162 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
7163 if (objtype == obj->ops->type->type &&
7164 nft_active_genmask(obj, genmask)) {
7165 rcu_read_unlock();
e5009240 7166 return obj;
4d44175a 7167 }
e5009240 7168 }
4d44175a
FW		 7169out:
7170 rcu_read_unlock();
e5009240
PNA		 7171 return ERR_PTR(-ENOENT);
7172}
cac20fcd 7173EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 7174
cac20fcd
PNA		 7175static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
7176 const struct nlattr *nla,
7177 u32 objtype, u8 genmask)
3ecbfd65
HS		 7178{
7179 struct nft_object *obj;
7180
7181 list_for_each_entry(obj, &table->objects, list) {
7182 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
7183 objtype == obj->ops->type->type &&
7184 nft_active_genmask(obj, genmask))
7185 return obj;
7186 }
7187 return ERR_PTR(-ENOENT);
7188}
7189
e5009240 7190static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 7191 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
7192 .len = NFT_TABLE_MAXNAMELEN - 1 },
7193 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
7194 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 7195 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
7196 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 7197 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 7198 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
7199 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 7200};
7201
84fba055
FW		 7202static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
7203 const struct nft_object_type *type,
e5009240
PNA		 7204 const struct nlattr *attr)
7205{
5b4c6e38 7206 struct nlattr **tb;
dfc46034 7207 const struct nft_object_ops *ops;
e5009240 7208 struct nft_object *obj;
5b4c6e38
GS		 7209 int err = -ENOMEM;
7210
7211 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
7212 if (!tb)
7213 goto err1;
e5009240
PNA		 7214
7215 if (attr) {
8cb08174
JB		 7216 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
7217 type->policy, NULL);
e5009240 7218 if (err < 0)
5b4c6e38 7219 goto err2;
e5009240
PNA		 7220 } else {
7221 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
7222 }
7223
dfc46034
PBG		 7224 if (type->select_ops) {
7225 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
7226 if (IS_ERR(ops)) {
7227 err = PTR_ERR(ops);
5b4c6e38 7228 goto err2;
dfc46034
PBG		 7229 }
7230 } else {
7231 ops = type->ops;
7232 }
7233
e5009240 7234 err = -ENOMEM;
33758c89 7235 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 7236 if (!obj)
7237 goto err2;
e5009240 7238
dfc46034 7239 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 7240 if (err < 0)
5b4c6e38 7241 goto err3;
e5009240 7242
dfc46034
PBG		 7243 obj->ops = ops;
7244
5b4c6e38 7245 kfree(tb);
e5009240 7246 return obj;
5b4c6e38 7247err3:
e5009240 7248 kfree(obj);
5b4c6e38
GS		 7249err2:
7250 kfree(tb);
e5009240
PNA		 7251err1:
7252 return ERR_PTR(err);
7253}
7254
7255static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 7256 struct nft_object *obj, bool reset)
e5009240
PNA		 7257{
7258 struct nlattr *nest;
7259
ae0be8de 7260 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 7261 if (!nest)
7262 goto nla_put_failure;
dfc46034 7263 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 7264 goto nla_put_failure;
7265 nla_nest_end(skb, nest);
7266 return 0;
7267
7268nla_put_failure:
7269 return -1;
7270}
7271
7272static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
7273{
7274 const struct nft_object_type *type;
7275
7276 list_for_each_entry(type, &nf_tables_objects, list) {
7277 if (objtype == type->type)
7278 return type;
7279 }
7280 return NULL;
7281}
7282
452238e8
FW		 7283static const struct nft_object_type *
7284nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 7285{
7286 const struct nft_object_type *type;
7287
7288 type = __nft_obj_type_get(objtype);
7289 if (type != NULL && try_module_get(type->owner))
7290 return type;
7291
f102d66b 7292 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 7293#ifdef CONFIG_MODULES
7294 if (type == NULL) {
eb014de4 7295 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 7296 return ERR_PTR(-EAGAIN);
7297 }
7298#endif
7299 return ERR_PTR(-ENOENT);
7300}
7301
d62d0ba9
FFM		 7302static int nf_tables_updobj(const struct nft_ctx *ctx,
7303 const struct nft_object_type *type,
7304 const struct nlattr *attr,
7305 struct nft_object *obj)
7306{
7307 struct nft_object *newobj;
7308 struct nft_trans *trans;
dad3bdee
FW		 7309 int err = -ENOMEM;
7310
7311 if (!try_module_get(type->owner))
7312 return -ENOENT;
d62d0ba9
FFM		 7313
7314 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
7315 sizeof(struct nft_trans_obj));
7316 if (!trans)
dad3bdee 7317 goto err_trans;
d62d0ba9
FFM		 7318
7319 newobj = nft_obj_init(ctx, type, attr);
7320 if (IS_ERR(newobj)) {
7321 err = PTR_ERR(newobj);
b74ae961 7322 goto err_free_trans;
d62d0ba9
FFM		 7323 }
7324
7325 nft_trans_obj(trans) = obj;
7326 nft_trans_obj_update(trans) = true;
7327 nft_trans_obj_newobj(trans) = newobj;
0854db2a 7328 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 7329
7330 return 0;
b74ae961
DC		 7331
7332err_free_trans:
d62d0ba9 7333 kfree(trans);
dad3bdee
FW		 7334err_trans:
7335 module_put(type->owner);
d62d0ba9
FFM		 7336 return err;
7337}
7338
7dab8ee3
PNA		 7339static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
7340 const struct nlattr * const nla[])
e5009240 7341{
7dab8ee3
PNA		 7342 struct netlink_ext_ack *extack = info->extack;
7343 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7344 u8 family = info->nfmsg->nfgen_family;
e5009240 7345 const struct nft_object_type *type;
7dab8ee3 7346 struct net *net = info->net;
e5009240
PNA		 7347 struct nft_table *table;
7348 struct nft_object *obj;
7349 struct nft_ctx ctx;
7350 u32 objtype;
7351 int err;
7352
7353 if (!nla[NFTA_OBJ_TYPE] ||
7354 !nla[NFTA_OBJ_NAME] ||
7355 !nla[NFTA_OBJ_DATA])
7356 return -EINVAL;
7357
6001a930
PNA		 7358 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7359 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7360 if (IS_ERR(table)) {
7361 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7362 return PTR_ERR(table);
36dd1bcc 7363 }
e5009240
PNA		 7364
7365 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7366 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 7367 if (IS_ERR(obj)) {
7368 err = PTR_ERR(obj);
36dd1bcc
PNA		 7369 if (err != -ENOENT) {
7370 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7371 return err;
36dd1bcc 7372 }
1a28ad74 7373 } else {
7dab8ee3 7374 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7375 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7376 return -EEXIST;
36dd1bcc 7377 }
7dab8ee3 7378 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 7379 return -EOPNOTSUPP;
7380
fd57d0cb 7381 type = __nft_obj_type_get(objtype);
dac7f50a
AT		 7382 if (WARN_ON_ONCE(!type))
7383 return -ENOENT;
7384
7dab8ee3 7385 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 7386
7387 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 7388 }
7389
7dab8ee3 7390 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 7391
452238e8 7392 type = nft_obj_type_get(net, objtype);
e5009240
PNA		 7393 if (IS_ERR(type))
7394 return PTR_ERR(type);
7395
84fba055 7396 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 7397 if (IS_ERR(obj)) {
7398 err = PTR_ERR(obj);
b131c964 7399 goto err_init;
e5009240 7400 }
d152159b 7401 obj->key.table = table;
3ecbfd65
HS		 7402 obj->handle = nf_tables_alloc_handle(table);
7403
33758c89 7404 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 7405 if (!obj->key.name) {
61509575 7406 err = -ENOMEM;
b131c964
JGG		 7407 goto err_strdup;
7408 }
7409
7410 if (nla[NFTA_OBJ_USERDATA]) {
af0acf22 7411 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
b131c964
JGG		 7412 if (obj->udata == NULL)
7413 goto err_userdata;
7414
85db827a 7415 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 7416 }
e5009240
PNA		 7417
7418 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
7419 if (err < 0)
b131c964 7420 goto err_trans;
e5009240 7421
4d44175a
FW		 7422 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
7423 nft_objname_ht_params);
7424 if (err < 0)
b131c964 7425 goto err_obj_ht;
4d44175a 7426
e5009240
PNA		 7427 list_add_tail_rcu(&obj->list, &table->objects);
7428 table->use++;
7429 return 0;
b131c964 7430err_obj_ht:
4d44175a
FW		 7431 /* queued in transaction log */
7432 INIT_LIST_HEAD(&obj->list);
7433 return err;
b131c964 7434err_trans:
b131c964 7435 kfree(obj->udata);
85dfd816
PNA		 7436err_userdata:
7437 kfree(obj->key.name);
b131c964 7438err_strdup:
dfc46034 7439 if (obj->ops->destroy)
00bfb320 7440 obj->ops->destroy(&ctx, obj);
e5009240 7441 kfree(obj);
b131c964 7442err_init:
e5009240
PNA		 7443 module_put(type->owner);
7444 return err;
7445}
7446
7447static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
7448 u32 portid, u32 seq, int event, u32 flags,
7449 int family, const struct nft_table *table,
43da04a5 7450 struct nft_object *obj, bool reset)
e5009240 7451{
e5009240
PNA		 7452 struct nlmsghdr *nlh;
7453
dedb67c4 7454 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7455 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7456 NFNETLINK_V0, nft_base_seq(net));
7457 if (!nlh)
e5009240
PNA		 7458 goto nla_put_failure;
7459
e5009240 7460 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 7461 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
3ecbfd65
HS		 7462 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7463 NFTA_OBJ_PAD))
e5009240
PNA		 7464 goto nla_put_failure;
7465
28339b21
PNA		 7466 if (event == NFT_MSG_DELOBJ) {
7467 nlmsg_end(skb, nlh);
7468 return 0;
7469 }
7470
7471 if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
7472 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
7473 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
7474 goto nla_put_failure;
7475
b131c964
JGG		 7476 if (obj->udata &&
7477 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7478 goto nla_put_failure;
7479
e5009240
PNA		 7480 nlmsg_end(skb, nlh);
7481 return 0;
7482
7483nla_put_failure:
7484 nlmsg_trim(skb, nlh);
7485 return -1;
7486}
7487
a9fea2a3 7488struct nft_obj_filter {
e46abbcc 7489 char *table;
a9fea2a3
PNA		 7490 u32 type;
7491};
7492
e5009240
PNA		 7493static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7494{
7495 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
e5009240 7496 const struct nft_table *table;
e5009240 7497 unsigned int idx = 0, s_idx = cb->args[0];
a9fea2a3 7498 struct nft_obj_filter *filter = cb->data;
e5009240
PNA		 7499 struct net *net = sock_net(skb->sk);
7500 int family = nfmsg->nfgen_family;
0854db2a 7501 struct nftables_pernet *nft_net;
43da04a5
PNA		 7502 struct nft_object *obj;
7503 bool reset = false;
7504
7505 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7506 reset = true;
e5009240
PNA		 7507
7508 rcu_read_lock();
d59d2f82 7509 nft_net = nft_pernet(net);
34002783 7510 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 7511
0854db2a 7512 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7513 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 7514 continue;
7515
36596dad
PNA		 7516 list_for_each_entry_rcu(obj, &table->objects, list) {
7517 if (!nft_is_active(net, obj))
7518 goto cont;
7519 if (idx < s_idx)
7520 goto cont;
7521 if (idx > s_idx)
7522 memset(&cb->args[1], 0,
7523 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7524 if (filter && filter->table &&
36596dad
PNA		 7525 strcmp(filter->table, table->name))
7526 goto cont;
7527 if (filter &&
7528 filter->type != NFT_OBJECT_UNSPEC &&
7529 obj->ops->type->type != filter->type)
7530 goto cont;
8e6cf365 7531 if (reset) {
68df2ed5 7532 char *buf = kasprintf(GFP_ATOMIC,
c520292f 7533 "%s:%u",
8e6cf365 7534 table->name,
0854db2a 7535 nft_net->base_seq);
8e6cf365
RGB		 7536
7537 audit_log_nfcfg(buf,
7538 family,
7539 obj->handle,
14224039 7540 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7541 GFP_ATOMIC);
8e6cf365
RGB		 7542 kfree(buf);
7543 }
7544
36596dad
PNA		 7545 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7546 cb->nlh->nlmsg_seq,
7547 NFT_MSG_NEWOBJ,
7548 NLM_F_MULTI | NLM_F_APPEND,
98319cb9 7549 table->family, table,
36596dad
PNA		 7550 obj, reset) < 0)
7551 goto done;
e5009240 7552
36596dad 7553 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7554cont:
36596dad 7555 idx++;
e5009240
PNA		 7556 }
7557 }
7558done:
7559 rcu_read_unlock();
7560
7561 cb->args[0] = idx;
7562 return skb->len;
7563}
7564
90fd131a 7565static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7566{
90fd131a
FW		 7567 const struct nlattr * const *nla = cb->data;
7568 struct nft_obj_filter *filter = NULL;
e46abbcc 7569
90fd131a
FW		 7570 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7571 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7572 if (!filter)
7573 return -ENOMEM;
7574
7575 if (nla[NFTA_OBJ_TABLE]) {
7576 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7577 if (!filter->table) {
7578 kfree(filter);
7579 return -ENOMEM;
7580 }
7581 }
7582
7583 if (nla[NFTA_OBJ_TYPE])
7584 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
8bea728d 7585 }
a9fea2a3 7586
90fd131a 7587 cb->data = filter;
a9fea2a3
PNA		 7588 return 0;
7589}
7590
90fd131a 7591static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7592{
90fd131a 7593 struct nft_obj_filter *filter = cb->data;
a9fea2a3 7594
90fd131a
FW		 7595 if (filter) {
7596 kfree(filter->table);
7597 kfree(filter);
e46abbcc 7598 }
a9fea2a3 7599
90fd131a 7600 return 0;
a9fea2a3
PNA		 7601}
7602
d9adf22a 7603/* called with rcu_read_lock held */
797d4980
PNA		 7604static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7605 const struct nlattr * const nla[])
e5009240 7606{
797d4980
PNA		 7607 struct netlink_ext_ack *extack = info->extack;
7608 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7609 u8 family = info->nfmsg->nfgen_family;
e5009240 7610 const struct nft_table *table;
797d4980 7611 struct net *net = info->net;
e5009240
PNA		 7612 struct nft_object *obj;
7613 struct sk_buff *skb2;
43da04a5 7614 bool reset = false;
e5009240
PNA		 7615 u32 objtype;
7616 int err;
7617
797d4980 7618 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7619 struct netlink_dump_control c = {
90fd131a 7620 .start = nf_tables_dump_obj_start,
e5009240 7621 .dump = nf_tables_dump_obj,
a9fea2a3 7622 .done = nf_tables_dump_obj_done,
d9adf22a 7623 .module = THIS_MODULE,
90fd131a 7624 .data = (void *)nla,
e5009240 7625 };
a9fea2a3 7626
797d4980 7627 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7628 }
7629
7630 if (!nla[NFTA_OBJ_NAME] ||
7631 !nla[NFTA_OBJ_TYPE])
7632 return -EINVAL;
7633
6001a930 7634 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7635 if (IS_ERR(table)) {
7636 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7637 return PTR_ERR(table);
36dd1bcc 7638 }
e5009240
PNA		 7639
7640 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7641 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7642 if (IS_ERR(obj)) {
7643 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7644 return PTR_ERR(obj);
36dd1bcc 7645 }
e5009240 7646
d9adf22a 7647 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7648 if (!skb2)
7649 return -ENOMEM;
7650
797d4980 7651 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7652 reset = true;
7653
8e6cf365 7654 if (reset) {
0854db2a
FW		 7655 const struct nftables_pernet *nft_net;
7656 char *buf;
7657
d59d2f82 7658 nft_net = nft_pernet(net);
0854db2a 7659 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7660
7661 audit_log_nfcfg(buf,
7662 family,
7663 obj->handle,
14224039 7664 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7665 GFP_ATOMIC);
8e6cf365
RGB		 7666 kfree(buf);
7667 }
7668
e5009240 7669 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7670 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7671 family, table, obj, reset);
e5009240 7672 if (err < 0)
ee921183 7673 goto err_fill_obj_info;
e5009240 7674
ee921183
PNA		 7675 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7676
7677err_fill_obj_info:
e5009240
PNA		 7678 kfree_skb(skb2);
7679 return err;
e5009240
PNA		 7680}
7681
00bfb320 7682static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7683{
dfc46034 7684 if (obj->ops->destroy)
00bfb320 7685 obj->ops->destroy(ctx, obj);
e5009240 7686
dfc46034 7687 module_put(obj->ops->type->owner);
d152159b 7688 kfree(obj->key.name);
bc7a7082 7689 kfree(obj->udata);
e5009240
PNA		 7690 kfree(obj);
7691}
7692
7dab8ee3
PNA		 7693static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7694 const struct nlattr * const nla[])
e5009240 7695{
7dab8ee3
PNA		 7696 struct netlink_ext_ack *extack = info->extack;
7697 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7698 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7699 struct net *net = info->net;
36dd1bcc 7700 const struct nlattr *attr;
e5009240
PNA		 7701 struct nft_table *table;
7702 struct nft_object *obj;
7703 struct nft_ctx ctx;
7704 u32 objtype;
7705
7706 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7707 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7708 return -EINVAL;
7709
6001a930
PNA		 7710 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7711 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7712 if (IS_ERR(table)) {
7713 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7714 return PTR_ERR(table);
36dd1bcc 7715 }
e5009240
PNA		 7716
7717 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7718 if (nla[NFTA_OBJ_HANDLE]) {
7719 attr = nla[NFTA_OBJ_HANDLE];
7720 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7721 } else {
7722 attr = nla[NFTA_OBJ_NAME];
4d44175a 7723 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7724 }
7725
7726 if (IS_ERR(obj)) {
f80a612d
FFM		 7727 if (PTR_ERR(obj) == -ENOENT &&
7728 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
7729 return 0;
7730
36dd1bcc 7731 NL_SET_BAD_ATTR(extack, attr);
e5009240 7732 return PTR_ERR(obj);
36dd1bcc
PNA		 7733 }
7734 if (obj->use > 0) {
7735 NL_SET_BAD_ATTR(extack, attr);
e5009240 7736 return -EBUSY;
36dd1bcc 7737 }
e5009240 7738
7dab8ee3 7739 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7740
7741 return nft_delobj(&ctx, obj);
7742}
7743
d152159b 7744void nft_obj_notify(struct net *net, const struct nft_table *table,
25e94a99 7745 struct nft_object *obj, u32 portid, u32 seq, int event,
6fb721cf 7746 u16 flags, int family, int report, gfp_t gfp)
e5009240 7747{
d59d2f82 7748 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7749 struct sk_buff *skb;
7750 int err;
c520292f 7751 char *buf = kasprintf(gfp, "%s:%u",
0854db2a 7752 table->name, nft_net->base_seq);
8e6cf365
RGB		 7753
7754 audit_log_nfcfg(buf,
7755 family,
7756 obj->handle,
7757 event == NFT_MSG_NEWOBJ ?
c520292f
RGB		 7758 AUDIT_NFT_OP_OBJ_REGISTER :
7759 AUDIT_NFT_OP_OBJ_UNREGISTER,
68df2ed5 7760 gfp);
8e6cf365 7761 kfree(buf);
e5009240 7762
2599e989
PNA		 7763 if (!report &&
7764 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7765 return;
e5009240 7766
2599e989 7767 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7768 if (skb == NULL)
7769 goto err;
7770
6fb721cf
PNA		 7771 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7772 flags & (NLM_F_CREATE | NLM_F_EXCL),
7773 family, table, obj, false);
e5009240
PNA		 7774 if (err < 0) {
7775 kfree_skb(skb);
7776 goto err;
7777 }
7778
0854db2a 7779 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7780 return;
e5009240 7781err:
25e94a99 7782 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7783}
2599e989
PNA		 7784EXPORT_SYMBOL_GPL(nft_obj_notify);
7785
25e94a99
PNA		 7786static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7787 struct nft_object *obj, int event)
2599e989 7788{
25e94a99 7789 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
6fb721cf 7790 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
2599e989 7791}
e5009240 7792
3b49e2e9
PNA		 7793/*
7794 * Flow tables
7795 */
7796void nft_register_flowtable_type(struct nf_flowtable_type *type)
7797{
7798 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7799 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7800 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7801}
7802EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7803
7804void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7805{
7806 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7807 list_del_rcu(&type->list);
7808 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7809}
7810EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7811
7812static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7813 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7814 .len = NFT_NAME_MAXLEN - 1 },
7815 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7816 .len = NFT_NAME_MAXLEN - 1 },
7817 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 7818 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 7819 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 7820};
7821
cac20fcd
PNA		 7822struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7823 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 7824{
7825 struct nft_flowtable *flowtable;
7826
d9adf22a 7827 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 7828 if (!nla_strcmp(nla, flowtable->name) &&
7829 nft_active_genmask(flowtable, genmask))
7830 return flowtable;
7831 }
7832 return ERR_PTR(-ENOENT);
7833}
cac20fcd 7834EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 7835
9b05b6e1
LGL		 7836void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7837 struct nft_flowtable *flowtable,
7838 enum nft_trans_phase phase)
7839{
7840 switch (phase) {
26b5a571 7841 case NFT_TRANS_PREPARE_ERROR:
9b05b6e1
LGL		 7842 case NFT_TRANS_PREPARE:
7843 case NFT_TRANS_ABORT:
7844 case NFT_TRANS_RELEASE:
7845 flowtable->use--;
954d8297 7846 fallthrough;
9b05b6e1
LGL		 7847 default:
7848 return;
7849 }
7850}
7851EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7852
ae0662f8 7853static struct nft_flowtable *
cac20fcd
PNA		 7854nft_flowtable_lookup_byhandle(const struct nft_table *table,
7855 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 7856{
7857 struct nft_flowtable *flowtable;
7858
7859 list_for_each_entry(flowtable, &table->flowtables, list) {
7860 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7861 nft_active_genmask(flowtable, genmask))
7862 return flowtable;
7863 }
7864 return ERR_PTR(-ENOENT);
7865}
7866
d9246a53
PNA		 7867struct nft_flowtable_hook {
7868 u32 num;
7869 int priority;
7870 struct list_head list;
7871};
7872
3b49e2e9
PNA		 7873static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7874 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7875 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7876 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7877};
7878
d9246a53 7879static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
8509f62b 7880 const struct nlattr * const nla[],
d9246a53 7881 struct nft_flowtable_hook *flowtable_hook,
c3c060ad
PNA		 7882 struct nft_flowtable *flowtable,
7883 struct netlink_ext_ack *extack, bool add)
3b49e2e9 7884{
3b49e2e9 7885 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 7886 struct nft_hook *hook;
3b49e2e9 7887 int hooknum, priority;
3f0465a9 7888 int err;
3b49e2e9 7889
d9246a53
PNA		 7890 INIT_LIST_HEAD(&flowtable_hook->list);
7891
8509f62b
PNA		 7892 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX,
7893 nla[NFTA_FLOWTABLE_HOOK],
8cb08174 7894 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 7895 if (err < 0)
7896 return err;
7897
5b6743fb
PNA		 7898 if (add) {
7899 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
8509f62b
PNA		 7900 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7901 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
7902 return -ENOENT;
7903 }
3b49e2e9 7904
5b6743fb
PNA		 7905 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7906 if (hooknum != NF_NETDEV_INGRESS)
7907 return -EOPNOTSUPP;
7908
7909 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7910
7911 flowtable_hook->priority = priority;
7912 flowtable_hook->num = hooknum;
7913 } else {
7914 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7915 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7916 if (hooknum != flowtable->hooknum)
7917 return -EOPNOTSUPP;
7918 }
7919
7920 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7921 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7922 if (priority != flowtable->data.priority)
7923 return -EOPNOTSUPP;
7924 }
3b49e2e9 7925
5b6743fb
PNA		 7926 flowtable_hook->priority = flowtable->data.priority;
7927 flowtable_hook->num = flowtable->hooknum;
7928 }
3b49e2e9 7929
05abe445
PNA		 7930 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7931 err = nf_tables_parse_netdev_hooks(ctx->net,
7932 tb[NFTA_FLOWTABLE_HOOK_DEVS],
c3c060ad
PNA		 7933 &flowtable_hook->list,
7934 extack);
05abe445
PNA		 7935 if (err < 0)
7936 return err;
7937 }
3b49e2e9 7938
d9246a53 7939 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 7940 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 7941 hook->ops.hooknum = flowtable_hook->num;
7942 hook->ops.priority = flowtable_hook->priority;
7943 hook->ops.priv = &flowtable->data;
7944 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 7945 }
7946
3b49e2e9
PNA		 7947 return err;
7948}
7949
98319cb9 7950static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 7951{
7952 const struct nf_flowtable_type *type;
7953
7954 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 7955 if (family == type->family)
3b49e2e9
PNA		 7956 return type;
7957 }
7958 return NULL;
7959}
7960
452238e8
FW		 7961static const struct nf_flowtable_type *
7962nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 7963{
7964 const struct nf_flowtable_type *type;
7965
98319cb9 7966 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 7967 if (type != NULL && try_module_get(type->owner))
7968 return type;
7969
f102d66b 7970 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 7971#ifdef CONFIG_MODULES
7972 if (type == NULL) {
eb014de4 7973 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 7974 return ERR_PTR(-EAGAIN);
7975 }
7976#endif
7977 return ERR_PTR(-ENOENT);
7978}
7979
5acab914 7980/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 7981static void nft_unregister_flowtable_hook(struct net *net,
7982 struct nft_flowtable *flowtable,
7983 struct nft_hook *hook)
7984{
7985 nf_unregister_net_hook(net, &hook->ops);
7986 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7987 FLOW_BLOCK_UNBIND);
7988}
7989
f9a43007
PNA		 7990static void __nft_unregister_flowtable_net_hooks(struct net *net,
7991 struct list_head *hook_list,
7992 bool release_netdev)
3b49e2e9 7993{
f9a43007 7994 struct nft_hook *hook, *next;
3b49e2e9 7995
f9a43007 7996 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 7997 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 7998 if (release_netdev) {
7999 list_del(&hook->list);
ab5e5c06 8000 kfree_rcu(hook, rcu);
f9a43007
PNA		 8001 }
8002 }
8003}
8004
8005static void nft_unregister_flowtable_net_hooks(struct net *net,
8006 struct list_head *hook_list)
8007{
8008 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 8009}
8010
8011static int nft_register_flowtable_net_hooks(struct net *net,
8012 struct nft_table *table,
f9382669 8013 struct list_head *hook_list,
3f0465a9
PNA		 8014 struct nft_flowtable *flowtable)
8015{
8016 struct nft_hook *hook, *hook2, *next;
8017 struct nft_flowtable *ft;
8018 int err, i = 0;
8019
f9382669 8020 list_for_each_entry(hook, hook_list, list) {
3f0465a9 8021 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 8022 if (!nft_is_active_next(net, ft))
8023 continue;
8024
3f0465a9
PNA		 8025 list_for_each_entry(hook2, &ft->hook_list, list) {
8026 if (hook->ops.dev == hook2->ops.dev &&
8027 hook->ops.pf == hook2->ops.pf) {
77a92189 8028 err = -EEXIST;
3f0465a9
PNA		 8029 goto err_unregister_net_hooks;
8030 }
8031 }
8032 }
3b49e2e9 8033
d7c03a9f 8034 err = flowtable->data.type->setup(&flowtable->data,
8035 hook->ops.dev,
8036 FLOW_BLOCK_BIND);
3f0465a9
PNA		 8037 if (err < 0)
8038 goto err_unregister_net_hooks;
8039
d7c03a9f 8040 err = nf_register_net_hook(net, &hook->ops);
8041 if (err < 0) {
8042 flowtable->data.type->setup(&flowtable->data,
8043 hook->ops.dev,
8044 FLOW_BLOCK_UNBIND);
8045 goto err_unregister_net_hooks;
8046 }
8047
3f0465a9 8048 i++;
3b49e2e9 8049 }
3f0465a9
PNA		 8050
8051 return 0;
8052
8053err_unregister_net_hooks:
f9382669 8054 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 8055 if (i-- <= 0)
8056 break;
8057
ff4bf2f4 8058 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8059 list_del_rcu(&hook->list);
8060 kfree_rcu(hook, rcu);
8061 }
8062
8063 return err;
3b49e2e9
PNA		 8064}
8065
cdc32546 8066static void nft_hooks_destroy(struct list_head *hook_list)
389a2cbc
PNA		 8067{
8068 struct nft_hook *hook, *next;
8069
8070 list_for_each_entry_safe(hook, next, hook_list, list) {
8071 list_del_rcu(&hook->list);
8072 kfree_rcu(hook, rcu);
8073 }
8074}
8075
78d9f48f 8076static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
c3c060ad
PNA		 8077 struct nft_flowtable *flowtable,
8078 struct netlink_ext_ack *extack)
78d9f48f
PNA		 8079{
8080 const struct nlattr * const *nla = ctx->nla;
8081 struct nft_flowtable_hook flowtable_hook;
8082 struct nft_hook *hook, *next;
8083 struct nft_trans *trans;
8084 bool unregister = false;
7b35582c 8085 u32 flags;
78d9f48f
PNA		 8086 int err;
8087
8509f62b
PNA		 8088 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8089 extack, false);
78d9f48f
PNA		 8090 if (err < 0)
8091 return err;
8092
8093 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8094 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
8095 list_del(&hook->list);
8096 kfree(hook);
8097 }
8098 }
8099
7b35582c
PNA		 8100 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8101 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 8102 if (flags & ~NFT_FLOWTABLE_MASK) {
8103 err = -EOPNOTSUPP;
8104 goto err_flowtable_update_hook;
8105 }
7b35582c 8106 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 8107 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
8108 err = -EOPNOTSUPP;
8109 goto err_flowtable_update_hook;
8110 }
7b35582c
PNA		 8111 } else {
8112 flags = flowtable->data.flags;
8113 }
8114
78d9f48f
PNA		 8115 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
8116 &flowtable_hook.list, flowtable);
8117 if (err < 0)
8118 goto err_flowtable_update_hook;
8119
8120 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
8121 sizeof(struct nft_trans_flowtable));
8122 if (!trans) {
8123 unregister = true;
8124 err = -ENOMEM;
8125 goto err_flowtable_update_hook;
8126 }
8127
7b35582c 8128 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 8129 nft_trans_flowtable(trans) = flowtable;
8130 nft_trans_flowtable_update(trans) = true;
8131 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
8132 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
8133
0854db2a 8134 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 8135
8136 return 0;
8137
8138err_flowtable_update_hook:
8139 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8140 if (unregister)
8141 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
8142 list_del_rcu(&hook->list);
8143 kfree_rcu(hook, rcu);
8144 }
8145
8146 return err;
8147
8148}
8149
7dab8ee3
PNA		 8150static int nf_tables_newflowtable(struct sk_buff *skb,
8151 const struct nfnl_info *info,
8152 const struct nlattr * const nla[])
3b49e2e9 8153{
7dab8ee3 8154 struct netlink_ext_ack *extack = info->extack;
d9246a53 8155 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 8156 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8157 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8158 const struct nf_flowtable_type *type;
3f0465a9
PNA		 8159 struct nft_flowtable *flowtable;
8160 struct nft_hook *hook, *next;
7dab8ee3 8161 struct net *net = info->net;
3b49e2e9
PNA		 8162 struct nft_table *table;
8163 struct nft_ctx ctx;
3f0465a9 8164 int err;
3b49e2e9
PNA		 8165
8166 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8167 !nla[NFTA_FLOWTABLE_NAME] ||
8168 !nla[NFTA_FLOWTABLE_HOOK])
8169 return -EINVAL;
8170
cac20fcd 8171 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8172 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8173 if (IS_ERR(table)) {
8174 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8175 return PTR_ERR(table);
36dd1bcc 8176 }
3b49e2e9 8177
cac20fcd
PNA		 8178 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8179 genmask);
3b49e2e9
PNA		 8180 if (IS_ERR(flowtable)) {
8181 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 8182 if (err != -ENOENT) {
8183 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8184 return err;
36dd1bcc 8185 }
3b49e2e9 8186 } else {
7dab8ee3 8187 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 8188 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8189 return -EEXIST;
36dd1bcc 8190 }
3b49e2e9 8191
7dab8ee3 8192 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 8193
c3c060ad 8194 return nft_flowtable_update(&ctx, info->nlh, flowtable, extack);
3b49e2e9
PNA		 8195 }
8196
7dab8ee3 8197 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 8198
33758c89 8199 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 8200 if (!flowtable)
8201 return -ENOMEM;
8202
8203 flowtable->table = table;
3ecbfd65 8204 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 8205 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 8206
33758c89 8207 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 8208 if (!flowtable->name) {
8209 err = -ENOMEM;
8210 goto err1;
8211 }
8212
452238e8 8213 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 8214 if (IS_ERR(type)) {
8215 err = PTR_ERR(type);
8216 goto err2;
8217 }
8218
8bb69f3b
PNA		 8219 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8220 flowtable->data.flags =
8221 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 8222 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
8223 err = -EOPNOTSUPP;
8bb69f3b 8224 goto err3;
7e6136f1 8225 }
8bb69f3b
PNA		 8226 }
8227
8228 write_pnet(&flowtable->data.net, net);
3b49e2e9 8229 flowtable->data.type = type;
a268de77 8230 err = type->init(&flowtable->data);
3b49e2e9
PNA		 8231 if (err < 0)
8232 goto err3;
8233
8509f62b
PNA		 8234 err = nft_flowtable_parse_hook(&ctx, nla, &flowtable_hook, flowtable,
8235 extack, true);
3b49e2e9 8236 if (err < 0)
a268de77 8237 goto err4;
3b49e2e9 8238
d9246a53
PNA		 8239 list_splice(&flowtable_hook.list, &flowtable->hook_list);
8240 flowtable->data.priority = flowtable_hook.priority;
8241 flowtable->hooknum = flowtable_hook.num;
8242
f9382669
PNA		 8243 err = nft_register_flowtable_net_hooks(ctx.net, table,
8244 &flowtable->hook_list,
8245 flowtable);
2d285f26 8246 if (err < 0) {
cdc32546 8247 nft_hooks_destroy(&flowtable->hook_list);
3f0465a9 8248 goto err4;
2d285f26 8249 }
3b49e2e9
PNA		 8250
8251 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
8252 if (err < 0)
3f0465a9 8253 goto err5;
3b49e2e9
PNA		 8254
8255 list_add_tail_rcu(&flowtable->list, &table->flowtables);
8256 table->use++;
8257
8258 return 0;
a268de77 8259err5:
3f0465a9 8260 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 8261 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8262 list_del_rcu(&hook->list);
8263 kfree_rcu(hook, rcu);
8264 }
a268de77
FF		 8265err4:
8266 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 8267err3:
8268 module_put(type->owner);
8269err2:
8270 kfree(flowtable->name);
8271err1:
8272 kfree(flowtable);
8273 return err;
8274}
8275
3003055f
PNA		 8276static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
8277{
8278 struct nft_hook *this, *next;
8279
8280 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
8281 list_del(&this->list);
8282 kfree(this);
8283 }
8284}
8285
abadb2f8 8286static int nft_delflowtable_hook(struct nft_ctx *ctx,
c3c060ad
PNA		 8287 struct nft_flowtable *flowtable,
8288 struct netlink_ext_ack *extack)
abadb2f8
PNA		 8289{
8290 const struct nlattr * const *nla = ctx->nla;
8291 struct nft_flowtable_hook flowtable_hook;
b6d9014a 8292 LIST_HEAD(flowtable_del_list);
3003055f 8293 struct nft_hook *this, *hook;
abadb2f8
PNA		 8294 struct nft_trans *trans;
8295 int err;
8296
8509f62b
PNA		 8297 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8298 extack, false);
abadb2f8
PNA		 8299 if (err < 0)
8300 return err;
8301
3003055f 8302 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 8303 hook = nft_hook_list_find(&flowtable->hook_list, this);
8304 if (!hook) {
8305 err = -ENOENT;
8306 goto err_flowtable_del_hook;
8307 }
b6d9014a 8308 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 8309 }
8310
8311 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
8312 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 8313 if (!trans) {
8314 err = -ENOMEM;
8315 goto err_flowtable_del_hook;
8316 }
abadb2f8
PNA		 8317
8318 nft_trans_flowtable(trans) = flowtable;
8319 nft_trans_flowtable_update(trans) = true;
8320 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 8321 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 8322 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 8323
0854db2a 8324 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 8325
8326 return 0;
8327
8328err_flowtable_del_hook:
b6d9014a 8329 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 8330 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 8331
8332 return err;
8333}
8334
7dab8ee3
PNA		 8335static int nf_tables_delflowtable(struct sk_buff *skb,
8336 const struct nfnl_info *info,
8337 const struct nlattr * const nla[])
3b49e2e9 8338{
7dab8ee3
PNA		 8339 struct netlink_ext_ack *extack = info->extack;
8340 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8341 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8342 struct nft_flowtable *flowtable;
7dab8ee3 8343 struct net *net = info->net;
36dd1bcc 8344 const struct nlattr *attr;
3b49e2e9
PNA		 8345 struct nft_table *table;
8346 struct nft_ctx ctx;
8347
e603ea4b
PNA		 8348 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8349 (!nla[NFTA_FLOWTABLE_NAME] &&
8350 !nla[NFTA_FLOWTABLE_HANDLE]))
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
36dd1bcc
PNA		 8360 if (nla[NFTA_FLOWTABLE_HANDLE]) {
8361 attr = nla[NFTA_FLOWTABLE_HANDLE];
8362 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
8363 } else {
8364 attr = nla[NFTA_FLOWTABLE_NAME];
8365 flowtable = nft_flowtable_lookup(table, attr, genmask);
8366 }
8367
8368 if (IS_ERR(flowtable)) {
f80a612d
FFM		 8369 if (PTR_ERR(flowtable) == -ENOENT &&
8370 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
8371 return 0;
8372
36dd1bcc
PNA		 8373 NL_SET_BAD_ATTR(extack, attr);
8374 return PTR_ERR(flowtable);
8375 }
abadb2f8 8376
7dab8ee3 8377 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 8378
8379 if (nla[NFTA_FLOWTABLE_HOOK])
c3c060ad 8380 return nft_delflowtable_hook(&ctx, flowtable, extack);
abadb2f8 8381
36dd1bcc
PNA		 8382 if (flowtable->use > 0) {
8383 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 8384 return -EBUSY;
36dd1bcc 8385 }
3b49e2e9 8386
3b49e2e9
PNA		 8387 return nft_delflowtable(&ctx, flowtable);
8388}
8389
8390static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
8391 u32 portid, u32 seq, int event,
8392 u32 flags, int family,
c42d8bda
PNA		 8393 struct nft_flowtable *flowtable,
8394 struct list_head *hook_list)
3b49e2e9
PNA		 8395{
8396 struct nlattr *nest, *nest_devs;
3f0465a9 8397 struct nft_hook *hook;
3b49e2e9 8398 struct nlmsghdr *nlh;
3b49e2e9
PNA		 8399
8400 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 8401 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
8402 NFNETLINK_V0, nft_base_seq(net));
8403 if (!nlh)
3b49e2e9
PNA		 8404 goto nla_put_failure;
8405
3b49e2e9
PNA		 8406 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
8407 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65 8408 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
28339b21
PNA		 8409 NFTA_FLOWTABLE_PAD))
8410 goto nla_put_failure;
8411
8412 if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
8413 nlmsg_end(skb, nlh);
8414 return 0;
8415 }
8416
8417 if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
8bb69f3b 8418 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 8419 goto nla_put_failure;
8420
ae0be8de 8421 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 8422 if (!nest)
8423 goto nla_put_failure;
3b49e2e9 8424 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 8425 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 8426 goto nla_put_failure;
8427
ae0be8de 8428 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 8429 if (!nest_devs)
8430 goto nla_put_failure;
8431
28339b21
PNA		 8432 if (!hook_list)
8433 hook_list = &flowtable->hook_list;
8434
c42d8bda 8435 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 8436 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 8437 goto nla_put_failure;
8438 }
8439 nla_nest_end(skb, nest_devs);
8440 nla_nest_end(skb, nest);
8441
8442 nlmsg_end(skb, nlh);
8443 return 0;
8444
8445nla_put_failure:
8446 nlmsg_trim(skb, nlh);
8447 return -1;
8448}
8449
8450struct nft_flowtable_filter {
8451 char *table;
8452};
8453
8454static int nf_tables_dump_flowtable(struct sk_buff *skb,
8455 struct netlink_callback *cb)
8456{
8457 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
8458 struct nft_flowtable_filter *filter = cb->data;
8459 unsigned int idx = 0, s_idx = cb->args[0];
8460 struct net *net = sock_net(skb->sk);
8461 int family = nfmsg->nfgen_family;
8462 struct nft_flowtable *flowtable;
0854db2a 8463 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 8464 const struct nft_table *table;
8465
8466 rcu_read_lock();
d59d2f82 8467 nft_net = nft_pernet(net);
34002783 8468 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 8469
0854db2a 8470 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 8471 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 8472 continue;
8473
36596dad
PNA		 8474 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8475 if (!nft_is_active(net, flowtable))
8476 goto cont;
8477 if (idx < s_idx)
8478 goto cont;
8479 if (idx > s_idx)
8480 memset(&cb->args[1], 0,
8481 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 8482 if (filter && filter->table &&
36596dad
PNA		 8483 strcmp(filter->table, table->name))
8484 goto cont;
3b49e2e9 8485
36596dad
PNA		 8486 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
8487 cb->nlh->nlmsg_seq,
8488 NFT_MSG_NEWFLOWTABLE,
8489 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda 8490 table->family,
28339b21 8491 flowtable, NULL) < 0)
36596dad 8492 goto done;
3b49e2e9 8493
36596dad 8494 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 8495cont:
36596dad 8496 idx++;
3b49e2e9
PNA		 8497 }
8498 }
8499done:
8500 rcu_read_unlock();
8501
8502 cb->args[0] = idx;
8503 return skb->len;
8504}
8505
90fd131a 8506static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 8507{
90fd131a
FW		 8508 const struct nlattr * const *nla = cb->data;
8509 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 8510
90fd131a
FW		 8511 if (nla[NFTA_FLOWTABLE_TABLE]) {
8512 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8513 if (!filter)
8514 return -ENOMEM;
3b49e2e9 8515
90fd131a
FW		 8516 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8517 GFP_ATOMIC);
8518 if (!filter->table) {
8519 kfree(filter);
8520 return -ENOMEM;
8521 }
8522 }
3b49e2e9 8523
90fd131a 8524 cb->data = filter;
3b49e2e9
PNA		 8525 return 0;
8526}
8527
90fd131a 8528static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 8529{
90fd131a 8530 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 8531
3b49e2e9 8532 if (!filter)
90fd131a 8533 return 0;
3b49e2e9 8534
90fd131a
FW		 8535 kfree(filter->table);
8536 kfree(filter);
8537
8538 return 0;
3b49e2e9
PNA		 8539}
8540
d9adf22a 8541/* called with rcu_read_lock held */
797d4980
PNA		 8542static int nf_tables_getflowtable(struct sk_buff *skb,
8543 const struct nfnl_info *info,
8544 const struct nlattr * const nla[])
3b49e2e9 8545{
797d4980 8546 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8547 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8548 struct nft_flowtable *flowtable;
3b49e2e9 8549 const struct nft_table *table;
797d4980 8550 struct net *net = info->net;
3b49e2e9
PNA		 8551 struct sk_buff *skb2;
8552 int err;
8553
797d4980 8554 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8555 struct netlink_dump_control c = {
90fd131a 8556 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8557 .dump = nf_tables_dump_flowtable,
8558 .done = nf_tables_dump_flowtable_done,
d9adf22a 8559 .module = THIS_MODULE,
90fd131a 8560 .data = (void *)nla,
3b49e2e9
PNA		 8561 };
8562
797d4980 8563 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8564 }
8565
8566 if (!nla[NFTA_FLOWTABLE_NAME])
8567 return -EINVAL;
8568
cac20fcd 8569 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8570 genmask, 0);
3b49e2e9
PNA		 8571 if (IS_ERR(table))
8572 return PTR_ERR(table);
8573
cac20fcd
PNA		 8574 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8575 genmask);
03a0120f 8576 if (IS_ERR(flowtable))
3b49e2e9
PNA		 8577 return PTR_ERR(flowtable);
8578
d9adf22a 8579 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8580 if (!skb2)
8581 return -ENOMEM;
8582
8583 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8584 info->nlh->nlmsg_seq,
3b49e2e9 8585 NFT_MSG_NEWFLOWTABLE, 0, family,
28339b21 8586 flowtable, NULL);
3b49e2e9 8587 if (err < 0)
ee921183 8588 goto err_fill_flowtable_info;
3b49e2e9 8589
ee921183
PNA		 8590 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8591
8592err_fill_flowtable_info:
3b49e2e9
PNA		 8593 kfree_skb(skb2);
8594 return err;
8595}
8596
8597static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8598 struct nft_flowtable *flowtable,
28339b21 8599 struct list_head *hook_list, int event)
3b49e2e9 8600{
d59d2f82 8601 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8602 struct sk_buff *skb;
6fb721cf 8603 u16 flags = 0;
3b49e2e9
PNA		 8604 int err;
8605
dceababa 8606 if (!ctx->report &&
3b49e2e9
PNA		 8607 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8608 return;
8609
8610 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8611 if (skb == NULL)
8612 goto err;
8613
6fb721cf
PNA		 8614 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8615 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8616
3b49e2e9 8617 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8618 ctx->seq, event, flags,
c42d8bda 8619 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8620 if (err < 0) {
8621 kfree_skb(skb);
8622 goto err;
8623 }
8624
0854db2a 8625 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8626 return;
8627err:
8628 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8629}
8630
3b49e2e9
PNA		 8631static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8632{
3f0465a9
PNA		 8633 struct nft_hook *hook, *next;
8634
5acab914 8635 flowtable->data.type->free(&flowtable->data);
3f0465a9 8636 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8637 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8638 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8639 list_del_rcu(&hook->list);
8640 kfree(hook);
8641 }
3b49e2e9 8642 kfree(flowtable->name);
3b49e2e9 8643 module_put(flowtable->data.type->owner);
a12486eb 8644 kfree(flowtable);
3b49e2e9
PNA		 8645}
8646
84d7fce6
PNA		 8647static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8648 u32 portid, u32 seq)
8649{
d59d2f82 8650 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8651 struct nlmsghdr *nlh;
784b4e61 8652 char buf[TASK_COMM_LEN];
dedb67c4 8653 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8654
19c28b13
PNA		 8655 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8656 NFNETLINK_V0, nft_base_seq(net));
8657 if (!nlh)
84d7fce6
PNA		 8658 goto nla_put_failure;
8659
0854db2a 8660 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8661 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8662 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8663 goto nla_put_failure;
8664
053c095a
JB		 8665 nlmsg_end(skb, nlh);
8666 return 0;
84d7fce6
PNA		 8667
8668nla_put_failure:
8669 nlmsg_trim(skb, nlh);
8670 return -EMSGSIZE;
8671}
8672
3b49e2e9
PNA		 8673static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8674 struct nft_flowtable *flowtable)
8675{
3f0465a9 8676 struct nft_hook *hook;
3b49e2e9 8677
3f0465a9
PNA		 8678 list_for_each_entry(hook, &flowtable->hook_list, list) {
8679 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8680 continue;
8681
5acab914 8682 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8683 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8684 list_del_rcu(&hook->list);
8685 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8686 break;
8687 }
8688}
8689
8690static int nf_tables_flowtable_event(struct notifier_block *this,
8691 unsigned long event, void *ptr)
8692{
8693 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8694 struct nft_flowtable *flowtable;
0854db2a 8695 struct nftables_pernet *nft_net;
3b49e2e9 8696 struct nft_table *table;
0a2cf5ee 8697 struct net *net;
3b49e2e9
PNA		 8698
8699 if (event != NETDEV_UNREGISTER)
8700 return 0;
8701
6a48de01 8702 net = dev_net(dev);
d59d2f82 8703 nft_net = nft_pernet(net);
0854db2a
FW		 8704 mutex_lock(&nft_net->commit_mutex);
8705 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8706 list_for_each_entry(flowtable, &table->flowtables, list) {
8707 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8708 }
8709 }
0854db2a 8710 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8711
3b49e2e9
PNA		 8712 return NOTIFY_DONE;
8713}
8714
8715static struct notifier_block nf_tables_flowtable_notifier = {
8716 .notifier_call = nf_tables_flowtable_event,
8717};
8718
25e94a99
PNA		 8719static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8720 int event)
84d7fce6
PNA		 8721{
8722 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8723 struct sk_buff *skb2;
8724 int err;
8725
dceababa 8726 if (!nlmsg_report(nlh) &&
84d7fce6 8727 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8728 return;
84d7fce6 8729
84d7fce6
PNA		 8730 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8731 if (skb2 == NULL)
8732 goto err;
8733
8734 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8735 nlh->nlmsg_seq);
8736 if (err < 0) {
8737 kfree_skb(skb2);
8738 goto err;
8739 }
8740
25e94a99
PNA		 8741 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8742 nlmsg_report(nlh), GFP_KERNEL);
8743 return;
84d7fce6 8744err:
25e94a99
PNA		 8745 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8746 -ENOBUFS);
84d7fce6
PNA		 8747}
8748
797d4980
PNA		 8749static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8750 const struct nlattr * const nla[])
84d7fce6 8751{
84d7fce6
PNA		 8752 struct sk_buff *skb2;
8753 int err;
8754
d9adf22a 8755 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8756 if (skb2 == NULL)
8757 return -ENOMEM;
8758
797d4980
PNA		 8759 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8760 info->nlh->nlmsg_seq);
84d7fce6 8761 if (err < 0)
ee921183 8762 goto err_fill_gen_info;
84d7fce6 8763
797d4980 8764 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8765
8766err_fill_gen_info:
84d7fce6
PNA		 8767 kfree_skb(skb2);
8768 return err;
8769}
8770
96518518
PM		 8771static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8772 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8773 .call = nf_tables_newtable,
8774 .type = NFNL_CB_BATCH,
96518518
PM		 8775 .attr_count = NFTA_TABLE_MAX,
8776 .policy = nft_table_policy,
8777 },
8778 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8779 .call = nf_tables_gettable,
8780 .type = NFNL_CB_RCU,
96518518
PM		 8781 .attr_count = NFTA_TABLE_MAX,
8782 .policy = nft_table_policy,
8783 },
8784 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8785 .call = nf_tables_deltable,
8786 .type = NFNL_CB_BATCH,
96518518
PM		 8787 .attr_count = NFTA_TABLE_MAX,
8788 .policy = nft_table_policy,
8789 },
f80a612d
FFM		 8790 [NFT_MSG_DESTROYTABLE] = {
8791 .call = nf_tables_deltable,
8792 .type = NFNL_CB_BATCH,
8793 .attr_count = NFTA_TABLE_MAX,
8794 .policy = nft_table_policy,
8795 },
96518518 8796 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8797 .call = nf_tables_newchain,
8798 .type = NFNL_CB_BATCH,
96518518
PM		 8799 .attr_count = NFTA_CHAIN_MAX,
8800 .policy = nft_chain_policy,
8801 },
8802 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8803 .call = nf_tables_getchain,
8804 .type = NFNL_CB_RCU,
96518518
PM		 8805 .attr_count = NFTA_CHAIN_MAX,
8806 .policy = nft_chain_policy,
8807 },
8808 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 8809 .call = nf_tables_delchain,
8810 .type = NFNL_CB_BATCH,
96518518
PM		 8811 .attr_count = NFTA_CHAIN_MAX,
8812 .policy = nft_chain_policy,
8813 },
f80a612d
FFM		 8814 [NFT_MSG_DESTROYCHAIN] = {
8815 .call = nf_tables_delchain,
8816 .type = NFNL_CB_BATCH,
8817 .attr_count = NFTA_CHAIN_MAX,
8818 .policy = nft_chain_policy,
8819 },
96518518 8820 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 8821 .call = nf_tables_newrule,
8822 .type = NFNL_CB_BATCH,
96518518
PM		 8823 .attr_count = NFTA_RULE_MAX,
8824 .policy = nft_rule_policy,
8825 },
8826 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 8827 .call = nf_tables_getrule,
8828 .type = NFNL_CB_RCU,
96518518
PM		 8829 .attr_count = NFTA_RULE_MAX,
8830 .policy = nft_rule_policy,
8831 },
8daa8fde
PS		 8832 [NFT_MSG_GETRULE_RESET] = {
8833 .call = nf_tables_getrule,
8834 .type = NFNL_CB_RCU,
8835 .attr_count = NFTA_RULE_MAX,
8836 .policy = nft_rule_policy,
8837 },
96518518 8838 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 8839 .call = nf_tables_delrule,
8840 .type = NFNL_CB_BATCH,
96518518
PM		 8841 .attr_count = NFTA_RULE_MAX,
8842 .policy = nft_rule_policy,
8843 },
f80a612d
FFM		 8844 [NFT_MSG_DESTROYRULE] = {
8845 .call = nf_tables_delrule,
8846 .type = NFNL_CB_BATCH,
8847 .attr_count = NFTA_RULE_MAX,
8848 .policy = nft_rule_policy,
8849 },
20a69341 8850 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 8851 .call = nf_tables_newset,
8852 .type = NFNL_CB_BATCH,
20a69341
PM		 8853 .attr_count = NFTA_SET_MAX,
8854 .policy = nft_set_policy,
8855 },
8856 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 8857 .call = nf_tables_getset,
8858 .type = NFNL_CB_RCU,
20a69341
PM		 8859 .attr_count = NFTA_SET_MAX,
8860 .policy = nft_set_policy,
8861 },
8862 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 8863 .call = nf_tables_delset,
8864 .type = NFNL_CB_BATCH,
20a69341
PM		 8865 .attr_count = NFTA_SET_MAX,
8866 .policy = nft_set_policy,
8867 },
f80a612d
FFM		 8868 [NFT_MSG_DESTROYSET] = {
8869 .call = nf_tables_delset,
8870 .type = NFNL_CB_BATCH,
8871 .attr_count = NFTA_SET_MAX,
8872 .policy = nft_set_policy,
8873 },
20a69341 8874 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 8875 .call = nf_tables_newsetelem,
8876 .type = NFNL_CB_BATCH,
20a69341
PM		 8877 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8878 .policy = nft_set_elem_list_policy,
8879 },
8880 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 8881 .call = nf_tables_getsetelem,
8882 .type = NFNL_CB_RCU,
20a69341
PM		 8883 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8884 .policy = nft_set_elem_list_policy,
8885 },
8886 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 8887 .call = nf_tables_delsetelem,
8888 .type = NFNL_CB_BATCH,
20a69341
PM		 8889 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8890 .policy = nft_set_elem_list_policy,
8891 },
f80a612d
FFM		 8892 [NFT_MSG_DESTROYSETELEM] = {
8893 .call = nf_tables_delsetelem,
8894 .type = NFNL_CB_BATCH,
8895 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8896 .policy = nft_set_elem_list_policy,
8897 },
84d7fce6 8898 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 8899 .call = nf_tables_getgen,
8900 .type = NFNL_CB_RCU,
84d7fce6 8901 },
e5009240 8902 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 8903 .call = nf_tables_newobj,
8904 .type = NFNL_CB_BATCH,
e5009240
PNA		 8905 .attr_count = NFTA_OBJ_MAX,
8906 .policy = nft_obj_policy,
8907 },
8908 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 8909 .call = nf_tables_getobj,
8910 .type = NFNL_CB_RCU,
e5009240
PNA		 8911 .attr_count = NFTA_OBJ_MAX,
8912 .policy = nft_obj_policy,
8913 },
8914 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 8915 .call = nf_tables_delobj,
8916 .type = NFNL_CB_BATCH,
e5009240
PNA		 8917 .attr_count = NFTA_OBJ_MAX,
8918 .policy = nft_obj_policy,
8919 },
f80a612d
FFM		 8920 [NFT_MSG_DESTROYOBJ] = {
8921 .call = nf_tables_delobj,
8922 .type = NFNL_CB_BATCH,
8923 .attr_count = NFTA_OBJ_MAX,
8924 .policy = nft_obj_policy,
8925 },
43da04a5 8926 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 8927 .call = nf_tables_getobj,
8928 .type = NFNL_CB_RCU,
43da04a5
PNA		 8929 .attr_count = NFTA_OBJ_MAX,
8930 .policy = nft_obj_policy,
8931 },
3b49e2e9 8932 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 8933 .call = nf_tables_newflowtable,
8934 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8935 .attr_count = NFTA_FLOWTABLE_MAX,
8936 .policy = nft_flowtable_policy,
8937 },
8938 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 8939 .call = nf_tables_getflowtable,
8940 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 8941 .attr_count = NFTA_FLOWTABLE_MAX,
8942 .policy = nft_flowtable_policy,
8943 },
8944 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 8945 .call = nf_tables_delflowtable,
8946 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8947 .attr_count = NFTA_FLOWTABLE_MAX,
8948 .policy = nft_flowtable_policy,
8949 },
f80a612d
FFM		 8950 [NFT_MSG_DESTROYFLOWTABLE] = {
8951 .call = nf_tables_delflowtable,
8952 .type = NFNL_CB_BATCH,
8953 .attr_count = NFTA_FLOWTABLE_MAX,
8954 .policy = nft_flowtable_policy,
8955 },
96518518
PM		 8956};
8957
a654de8f
PNA		 8958static int nf_tables_validate(struct net *net)
8959{
d59d2f82 8960 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 8961 struct nft_table *table;
8962
00c320f9
FW		 8963 list_for_each_entry(table, &nft_net->tables, list) {
8964 switch (table->validate_state) {
8965 case NFT_VALIDATE_SKIP:
8966 continue;
8967 case NFT_VALIDATE_NEED:
8968 nft_validate_state_update(table, NFT_VALIDATE_DO);
8969 fallthrough;
8970 case NFT_VALIDATE_DO:
a654de8f
PNA		 8971 if (nft_table_validate(net, table) < 0)
8972 return -EAGAIN;
00c320f9
FW		 8973
8974 nft_validate_state_update(table, NFT_VALIDATE_SKIP);
a654de8f 8975 }
9a32e985 8976
a654de8f
PNA		 8977 break;
8978 }
8979
8980 return 0;
8981}
8982
66293c46
FW		 8983/* a drop policy has to be deferred until all rules have been activated,
8984 * otherwise a large ruleset that contains a drop-policy base chain will
8985 * cause all packets to get dropped until the full transaction has been
8986 * processed.
8987 *
8988 * We defer the drop policy until the transaction has been finalized.
8989 */
8990static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8991{
8992 struct nft_base_chain *basechain;
8993
8994 if (nft_trans_chain_policy(trans) != NF_DROP)
8995 return;
8996
8997 if (!nft_is_base_chain(trans->ctx.chain))
8998 return;
8999
9000 basechain = nft_base_chain(trans->ctx.chain);
9001 basechain->policy = NF_DROP;
9002}
9003
91c7b38d
PNA		 9004static void nft_chain_commit_update(struct nft_trans *trans)
9005{
9006 struct nft_base_chain *basechain;
9007
1b2470e5
FW		 9008 if (nft_trans_chain_name(trans)) {
9009 rhltable_remove(&trans->ctx.table->chains_ht,
9010 &trans->ctx.chain->rhlhead,
9011 nft_chain_ht_params);
d71efb59 9012 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 9013 rhltable_insert_key(&trans->ctx.table->chains_ht,
9014 trans->ctx.chain->name,
9015 &trans->ctx.chain->rhlhead,
9016 nft_chain_ht_params);
9017 }
91c7b38d 9018
f323d954 9019 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 9020 return;
9021
53315ac6
FW		 9022 nft_chain_stats_replace(trans);
9023
91c7b38d 9024 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 9025
9026 switch (nft_trans_chain_policy(trans)) {
9027 case NF_DROP:
9028 case NF_ACCEPT:
9029 basechain->policy = nft_trans_chain_policy(trans);
9030 break;
9031 }
9032}
9033
d62d0ba9
FFM		 9034static void nft_obj_commit_update(struct nft_trans *trans)
9035{
9036 struct nft_object *newobj;
9037 struct nft_object *obj;
9038
9039 obj = nft_trans_obj(trans);
9040 newobj = nft_trans_obj_newobj(trans);
9041
9fedd894
FFM		 9042 if (obj->ops->update)
9043 obj->ops->update(obj, newobj);
d62d0ba9 9044
dad3bdee 9045 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 9046}
9047
2f99aa31 9048static void nft_commit_release(struct nft_trans *trans)
c7c32e72 9049{
c7c32e72
PNA		 9050 switch (trans->msg_type) {
9051 case NFT_MSG_DELTABLE:
f80a612d 9052 case NFT_MSG_DESTROYTABLE:
c7c32e72
PNA		 9053 nf_tables_table_destroy(&trans->ctx);
9054 break;
9f8aac0b 9055 case NFT_MSG_NEWCHAIN:
53315ac6 9056 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 9057 kfree(nft_trans_chain_name(trans));
9058 break;
c7c32e72 9059 case NFT_MSG_DELCHAIN:
f80a612d 9060 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9061 if (nft_trans_chain_update(trans))
9062 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9063 else
9064 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9065 break;
9066 case NFT_MSG_DELRULE:
f80a612d 9067 case NFT_MSG_DESTROYRULE:
c7c32e72
PNA		 9068 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9069 break;
9070 case NFT_MSG_DELSET:
f80a612d 9071 case NFT_MSG_DESTROYSET:
0c2a85ed 9072 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9073 break;
61edafbb 9074 case NFT_MSG_DELSETELEM:
f80a612d 9075 case NFT_MSG_DESTROYSETELEM:
3453c927
PNA		 9076 nf_tables_set_elem_destroy(&trans->ctx,
9077 nft_trans_elem_set(trans),
59105446 9078 nft_trans_elem(trans).priv);
61edafbb 9079 break;
e5009240 9080 case NFT_MSG_DELOBJ:
f80a612d 9081 case NFT_MSG_DESTROYOBJ:
00bfb320 9082 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9083 break;
3b49e2e9 9084 case NFT_MSG_DELFLOWTABLE:
f80a612d 9085 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9086 if (nft_trans_flowtable_update(trans))
cdc32546 9087 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
abadb2f8
PNA		 9088 else
9089 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9090 break;
c7c32e72 9091 }
0935d558
FW		 9092
9093 if (trans->put_net)
9094 put_net(trans->ctx.net);
9095
c7c32e72
PNA		 9096 kfree(trans);
9097}
9098
0935d558 9099static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 9100{
9101 struct nft_trans *trans, *next;
0935d558
FW		 9102 LIST_HEAD(head);
9103
9104 spin_lock(&nf_tables_destroy_list_lock);
9105 list_splice_init(&nf_tables_destroy_list, &head);
9106 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 9107
0935d558 9108 if (list_empty(&head))
2f99aa31
FW		 9109 return;
9110
9111 synchronize_rcu();
9112
0935d558 9113 list_for_each_entry_safe(trans, next, &head, list) {
2f99aa31
FW		 9114 list_del(&trans->list);
9115 nft_commit_release(trans);
9116 }
9117}
9118
ffe8923f
FW		 9119void nf_tables_trans_destroy_flush_work(void)
9120{
9121 flush_work(&trans_destroy_work);
9122}
9123EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
9124
ed5f85d4
PNA		 9125static bool nft_expr_reduce(struct nft_regs_track *track,
9126 const struct nft_expr *expr)
9127{
9e539c5b 9128 return false;
ed5f85d4
PNA		 9129}
9130
0cbc06b3
FW		 9131static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
9132{
2c865a8a 9133 const struct nft_expr *expr, *last;
12e4ecfa 9134 struct nft_regs_track track = {};
2c865a8a
PNA		 9135 unsigned int size, data_size;
9136 void *data, *data_boundary;
9137 struct nft_rule_dp *prule;
0cbc06b3 9138 struct nft_rule *rule;
0cbc06b3
FW		 9139
9140 /* already handled or inactive chain? */
2c865a8a 9141 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 9142 return 0;
9143
63045bfd 9144 data_size = 0;
10377d42 9145 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 9146 if (nft_is_active_next(net, rule)) {
9147 data_size += sizeof(*prule) + rule->dlen;
9148 if (data_size > INT_MAX)
9149 return -ENOMEM;
9150 }
0cbc06b3
FW		 9151 }
9152
e38fbfa9 9153 chain->blob_next = nf_tables_chain_alloc_rules(chain, data_size);
2c865a8a 9154 if (!chain->blob_next)
0cbc06b3
FW		 9155 return -ENOMEM;
9156
2c865a8a
PNA		 9157 data = (void *)chain->blob_next->data;
9158 data_boundary = data + data_size;
9159 size = 0;
9160
10377d42 9161 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 9162 if (!nft_is_active_next(net, rule))
9163 continue;
9164
9165 prule = (struct nft_rule_dp *)data;
9166 data += offsetof(struct nft_rule_dp, data);
9167 if (WARN_ON_ONCE(data > data_boundary))
9168 return -ENOMEM;
9169
12e4ecfa 9170 size = 0;
fe75e84a 9171 track.last = nft_expr_last(rule);
2c865a8a 9172 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 9173 track.cur = expr;
9174
ed5f85d4 9175 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 9176 expr = track.cur;
9177 continue;
9178 }
9179
08e42a0d 9180 if (WARN_ON_ONCE(data + size + expr->ops->size > data_boundary))
2c865a8a
PNA		 9181 return -ENOMEM;
9182
9183 memcpy(data + size, expr, expr->ops->size);
9184 size += expr->ops->size;
9185 }
9186 if (WARN_ON_ONCE(size >= 1 << 12))
9187 return -ENOMEM;
9188
9189 prule->handle = rule->handle;
9190 prule->dlen = size;
9191 prule->is_last = 0;
9192
9193 data += size;
9194 size = 0;
9195 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 9196 }
9197
2c865a8a
PNA		 9198 if (WARN_ON_ONCE(data > data_boundary))
9199 return -ENOMEM;
9200
e38fbfa9
FW		 9201 prule = (struct nft_rule_dp *)data;
9202 nft_last_rule(chain, prule);
2c865a8a 9203
0cbc06b3
FW		 9204 return 0;
9205}
9206
9207static void nf_tables_commit_chain_prepare_cancel(struct net *net)
9208{
d59d2f82 9209 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 9210 struct nft_trans *trans, *next;
9211
0854db2a 9212 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 9213 struct nft_chain *chain = trans->ctx.chain;
9214
9215 if (trans->msg_type == NFT_MSG_NEWRULE ||
9216 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 9217 kvfree(chain->blob_next);
9218 chain->blob_next = NULL;
0cbc06b3
FW		 9219 }
9220 }
9221}
9222
e38fbfa9 9223static void __nf_tables_commit_chain_free_rules(struct rcu_head *h)
0cbc06b3 9224{
e38fbfa9 9225 struct nft_rule_dp_last *l = container_of(h, struct nft_rule_dp_last, h);
0cbc06b3 9226
e38fbfa9 9227 kvfree(l->blob);
0cbc06b3
FW		 9228}
9229
2c865a8a 9230static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 9231{
e38fbfa9 9232 struct nft_rule_dp_last *last;
0cbc06b3 9233
e38fbfa9
FW		 9234 /* last rule trailer is after end marker */
9235 last = (void *)blob + sizeof(*blob) + blob->size;
9236 last->blob = blob;
0cbc06b3 9237
e38fbfa9 9238 call_rcu(&last->h, __nf_tables_commit_chain_free_rules);
0cbc06b3
FW		 9239}
9240
0fb39bbe 9241static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 9242{
2c865a8a 9243 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 9244 bool next_genbit;
9245
9246 next_genbit = nft_gencursor_next(net);
9247
2c865a8a 9248 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 9249 lockdep_commit_lock_is_held(net));
2c865a8a 9250 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 9251 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 9252
9253 /* No changes to this chain? */
2c865a8a 9254 if (chain->blob_next == NULL) {
0cbc06b3
FW		 9255 /* chain had no change in last or next generation */
9256 if (g0 == g1)
9257 return;
9258 /*
9259 * chain had no change in this generation; make sure next
9260 * one uses same rules as current generation.
9261 */
9262 if (next_genbit) {
2c865a8a 9263 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 9264 nf_tables_commit_chain_free_rules_old(g1);
9265 } else {
2c865a8a 9266 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 9267 nf_tables_commit_chain_free_rules_old(g0);
9268 }
9269
9270 return;
9271 }
9272
9273 if (next_genbit)
2c865a8a 9274 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 9275 else
2c865a8a 9276 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 9277
2c865a8a 9278 chain->blob_next = NULL;
0cbc06b3
FW		 9279
9280 if (g0 == g1)
9281 return;
9282
9283 if (next_genbit)
9284 nf_tables_commit_chain_free_rules_old(g1);
9285 else
9286 nf_tables_commit_chain_free_rules_old(g0);
9287}
9288
d152159b
FW		 9289static void nft_obj_del(struct nft_object *obj)
9290{
4d44175a 9291 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 9292 list_del_rcu(&obj->list);
9293}
9294
d0e2c7de 9295void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 9296{
9297 struct nft_table *table = chain->table;
9298
9299 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
9300 nft_chain_ht_params));
9301 list_del_rcu(&chain->list);
9302}
9303
eb014de4
PNA		 9304static void nf_tables_module_autoload_cleanup(struct net *net)
9305{
d59d2f82 9306 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9307 struct nft_module_request *req, *next;
9308
0854db2a
FW		 9309 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
9310 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 9311 WARN_ON_ONCE(!req->done);
9312 list_del(&req->list);
9313 kfree(req);
9314 }
9315}
9316
0935d558
FW		 9317static void nf_tables_commit_release(struct net *net)
9318{
d59d2f82 9319 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 9320 struct nft_trans *trans;
9321
9322 /* all side effects have to be made visible.
9323 * For example, if a chain named 'foo' has been deleted, a
9324 * new transaction must not find it anymore.
9325 *
9326 * Memory reclaim happens asynchronously from work queue
9327 * to prevent expensive synchronize_rcu() in commit phase.
9328 */
0854db2a 9329 if (list_empty(&nft_net->commit_list)) {
eb014de4 9330 nf_tables_module_autoload_cleanup(net);
0854db2a 9331 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9332 return;
9333 }
9334
0854db2a 9335 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 9336 struct nft_trans, list);
9337 get_net(trans->ctx.net);
9338 WARN_ON_ONCE(trans->put_net);
9339
9340 trans->put_net = true;
9341 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 9342 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 9343 spin_unlock(&nf_tables_destroy_list_lock);
9344
eb014de4 9345 nf_tables_module_autoload_cleanup(net);
0935d558 9346 schedule_work(&trans_destroy_work);
ffe8923f 9347
0854db2a 9348 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9349}
9350
67cc570e
PNA		 9351static void nft_commit_notify(struct net *net, u32 portid)
9352{
d59d2f82 9353 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 9354 struct sk_buff *batch_skb = NULL, *nskb, *skb;
9355 unsigned char *data;
9356 int len;
9357
0854db2a 9358 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 9359 if (!batch_skb) {
9360new_batch:
9361 batch_skb = skb;
9362 len = NLMSG_GOODSIZE - skb->len;
9363 list_del(&skb->list);
9364 continue;
9365 }
9366 len -= skb->len;
9367 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
9368 data = skb_put(batch_skb, skb->len);
9369 memcpy(data, skb->data, skb->len);
9370 list_del(&skb->list);
9371 kfree_skb(skb);
9372 continue;
9373 }
9374 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9375 NFT_CB(batch_skb).report, GFP_KERNEL);
9376 goto new_batch;
9377 }
9378
9379 if (batch_skb) {
9380 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9381 NFT_CB(batch_skb).report, GFP_KERNEL);
9382 }
9383
0854db2a 9384 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 9385}
9386
c520292f
RGB		 9387static int nf_tables_commit_audit_alloc(struct list_head *adl,
9388 struct nft_table *table)
9389{
9390 struct nft_audit_data *adp;
9391
9392 list_for_each_entry(adp, adl, list) {
9393 if (adp->table == table)
9394 return 0;
9395 }
9396 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
9397 if (!adp)
9398 return -ENOMEM;
9399 adp->table = table;
9400 list_add(&adp->list, adl);
9401 return 0;
9402}
9403
cfbe3650
DM		 9404static void nf_tables_commit_audit_free(struct list_head *adl)
9405{
9406 struct nft_audit_data *adp, *adn;
9407
9408 list_for_each_entry_safe(adp, adn, adl, list) {
9409 list_del(&adp->list);
9410 kfree(adp);
9411 }
9412}
9413
c520292f
RGB		 9414static void nf_tables_commit_audit_collect(struct list_head *adl,
9415 struct nft_table *table, u32 op)
9416{
9417 struct nft_audit_data *adp;
9418
9419 list_for_each_entry(adp, adl, list) {
9420 if (adp->table == table)
9421 goto found;
9422 }
dadf33c9 9423 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 9424 return;
9425found:
9426 adp->entries++;
9427 if (!adp->op || adp->op > op)
9428 adp->op = op;
9429}
9430
9431#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
9432
9433static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
9434{
9435 struct nft_audit_data *adp, *adn;
9436 char aubuf[AUNFTABLENAMELEN];
9437
9438 list_for_each_entry_safe(adp, adn, adl, list) {
9439 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
9440 generation);
9441 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
9442 nft2audit_op[adp->op], GFP_KERNEL);
9443 list_del(&adp->list);
9444 kfree(adp);
9445 }
9446}
9447
212ed75d
PNA		 9448static void nft_set_commit_update(struct list_head *set_update_list)
9449{
9450 struct nft_set *set, *next;
9451
9452 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
9453 list_del_init(&set->pending_update);
9454
9455 if (!set->ops->commit)
9456 continue;
9457
9458 set->ops->commit(set);
9459 }
9460}
9461
5913beaf 9462static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 9463{
d59d2f82 9464 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9465 struct nft_trans *trans, *next;
212ed75d 9466 LIST_HEAD(set_update_list);
a3716e70 9467 struct nft_trans_elem *te;
0cbc06b3
FW		 9468 struct nft_chain *chain;
9469 struct nft_table *table;
34002783 9470 unsigned int base_seq;
c520292f 9471 LIST_HEAD(adl);
c9626a2c 9472 int err;
37082f93 9473
0854db2a
FW		 9474 if (list_empty(&nft_net->commit_list)) {
9475 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 9476 return 0;
9477 }
9478
a654de8f
PNA		 9479 /* 0. Validate ruleset, otherwise roll back for error reporting. */
9480 if (nf_tables_validate(net) < 0)
9481 return -EAGAIN;
9482
c9626a2c
PNA		 9483 err = nft_flow_rule_offload_commit(net);
9484 if (err < 0)
9485 return err;
9486
0cbc06b3 9487 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 9488 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 9489 int ret;
37082f93 9490
c520292f
RGB		 9491 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
9492 if (ret) {
9493 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9494 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 9495 return ret;
9496 }
0cbc06b3
FW		 9497 if (trans->msg_type == NFT_MSG_NEWRULE ||
9498 trans->msg_type == NFT_MSG_DELRULE) {
9499 chain = trans->ctx.chain;
9500
9501 ret = nf_tables_commit_chain_prepare(net, chain);
9502 if (ret < 0) {
9503 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9504 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 9505 return ret;
9506 }
9507 }
9508 }
37082f93 9509
0cbc06b3 9510 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 9511 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 9512 list_for_each_entry(chain, &table->chains, list)
9513 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 9514 }
9515
9516 /*
9517 * Bump generation counter, invalidate any dump in progress.
9518 * Cannot fail after this point.
37082f93 9519 */
34002783
PNA		 9520 base_seq = READ_ONCE(nft_net->base_seq);
9521 while (++base_seq == 0)
0854db2a 9522 ;
0cbc06b3 9523
34002783
PNA		 9524 WRITE_ONCE(nft_net->base_seq, base_seq);
9525
0cbc06b3
FW		 9526 /* step 3. Start new generation, rules_gen_X now in use. */
9527 net->nft.gencursor = nft_gencursor_next(net);
37082f93 9528
0854db2a 9529 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 9530 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
9531 trans->msg_type);
b380e5c7 9532 switch (trans->msg_type) {
55dd6f93
PNA		 9533 case NFT_MSG_NEWTABLE:
9534 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9535 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9536 nft_trans_destroy(trans);
9537 break;
9538 }
9539 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 9540 nf_tables_table_disable(net, trans->ctx.table);
9541
179d9ba5 9542 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 9543 } else {
f2a6d766 9544 nft_clear(net, trans->ctx.table);
55dd6f93 9545 }
35151d84 9546 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 9547 nft_trans_destroy(trans);
9548 break;
9549 case NFT_MSG_DELTABLE:
f80a612d 9550 case NFT_MSG_DESTROYTABLE:
f2a6d766 9551 list_del_rcu(&trans->ctx.table->list);
f80a612d 9552 nf_tables_table_notify(&trans->ctx, trans->msg_type);
55dd6f93 9553 break;
91c7b38d 9554 case NFT_MSG_NEWCHAIN:
9f8aac0b 9555 if (nft_trans_chain_update(trans)) {
91c7b38d 9556 nft_chain_commit_update(trans);
b9703ed4
PNA		 9557 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN,
9558 &nft_trans_chain_hooks(trans));
9559 list_splice(&nft_trans_chain_hooks(trans),
9560 &nft_trans_basechain(trans)->hook_list);
9f8aac0b
FW		 9561 /* trans destroyed after rcu grace period */
9562 } else {
66293c46 9563 nft_chain_commit_drop_policy(trans);
664b0f8c 9564 nft_clear(net, trans->ctx.chain);
b9703ed4 9565 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
9f8aac0b
FW		 9566 nft_trans_destroy(trans);
9567 }
91c7b38d
PNA		 9568 break;
9569 case NFT_MSG_DELCHAIN:
f80a612d 9570 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9571 if (nft_trans_chain_update(trans)) {
9572 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9573 &nft_trans_chain_hooks(trans));
9574 nft_netdev_unregister_hooks(net,
9575 &nft_trans_chain_hooks(trans),
9576 true);
9577 } else {
9578 nft_chain_del(trans->ctx.chain);
9579 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9580 NULL);
9581 nf_tables_unregister_hook(trans->ctx.net,
9582 trans->ctx.table,
9583 trans->ctx.chain);
9584 }
91c7b38d 9585 break;
b380e5c7 9586 case NFT_MSG_NEWRULE:
889f7ee7 9587 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 9588 nf_tables_rule_notify(&trans->ctx,
37082f93 9589 nft_trans_rule(trans),
35151d84 9590 NFT_MSG_NEWRULE);
9dd732e0
PNA		 9591 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9592 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9593
37082f93 9594 nft_trans_destroy(trans);
b380e5c7
PNA		 9595 break;
9596 case NFT_MSG_DELRULE:
f80a612d 9597 case NFT_MSG_DESTROYRULE:
b380e5c7 9598 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 9599 nf_tables_rule_notify(&trans->ctx,
9600 nft_trans_rule(trans),
f80a612d 9601 trans->msg_type);
f6ac8585
PNA		 9602 nft_rule_expr_deactivate(&trans->ctx,
9603 nft_trans_rule(trans),
9604 NFT_TRANS_COMMIT);
26b5934f
PNA		 9605
9606 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9607 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7 9608 break;
958bee14 9609 case NFT_MSG_NEWSET:
123b9961
PNA		 9610 if (nft_trans_set_update(trans)) {
9611 struct nft_set *set = nft_trans_set(trans);
4fefee57 9612
123b9961
PNA		 9613 WRITE_ONCE(set->timeout, nft_trans_set_timeout(trans));
9614 WRITE_ONCE(set->gc_int, nft_trans_set_gc_int(trans));
9615 } else {
9616 nft_clear(net, nft_trans_set(trans));
9617 /* This avoids hitting -EBUSY when deleting the table
9618 * from the transaction.
9619 */
9620 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
9621 !list_empty(&nft_trans_set(trans)->bindings))
9622 trans->ctx.table->use--;
9623 }
958bee14 9624 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 9625 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 9626 nft_trans_destroy(trans);
9627 break;
9628 case NFT_MSG_DELSET:
f80a612d 9629 case NFT_MSG_DESTROYSET:
37a9cc52 9630 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 9631 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
f80a612d 9632 trans->msg_type, GFP_KERNEL);
958bee14 9633 break;
60319eb1 9634 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 9635 te = (struct nft_trans_elem *)trans->data;
9636
aaa31047 9637 nft_setelem_activate(net, te->set, &te->elem);
cc02e457
PM		 9638 nf_tables_setelem_notify(&trans->ctx, te->set,
9639 &te->elem,
6fb721cf 9640 NFT_MSG_NEWSETELEM);
212ed75d
PNA		 9641 if (te->set->ops->commit &&
9642 list_empty(&te->set->pending_update)) {
9643 list_add_tail(&te->set->pending_update,
9644 &set_update_list);
9645 }
60319eb1
PNA		 9646 nft_trans_destroy(trans);
9647 break;
9648 case NFT_MSG_DELSETELEM:
f80a612d 9649 case NFT_MSG_DESTROYSETELEM:
a3716e70 9650 te = (struct nft_trans_elem *)trans->data;
fe2811eb 9651
a3716e70
PNA		 9652 nf_tables_setelem_notify(&trans->ctx, te->set,
9653 &te->elem,
f80a612d 9654 trans->msg_type);
aaa31047
PNA		 9655 nft_setelem_remove(net, te->set, &te->elem);
9656 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9657 atomic_dec(&te->set->nelems);
9658 te->set->ndeact--;
9659 }
212ed75d
PNA		 9660 if (te->set->ops->commit &&
9661 list_empty(&te->set->pending_update)) {
9662 list_add_tail(&te->set->pending_update,
9663 &set_update_list);
9664 }
60319eb1 9665 break;
e5009240 9666 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 9667 if (nft_trans_obj_update(trans)) {
9668 nft_obj_commit_update(trans);
9669 nf_tables_obj_notify(&trans->ctx,
9670 nft_trans_obj(trans),
9671 NFT_MSG_NEWOBJ);
9672 } else {
9673 nft_clear(net, nft_trans_obj(trans));
9674 nf_tables_obj_notify(&trans->ctx,
9675 nft_trans_obj(trans),
9676 NFT_MSG_NEWOBJ);
9677 nft_trans_destroy(trans);
9678 }
e5009240
PNA		 9679 break;
9680 case NFT_MSG_DELOBJ:
f80a612d 9681 case NFT_MSG_DESTROYOBJ:
d152159b 9682 nft_obj_del(nft_trans_obj(trans));
e5009240 9683 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
f80a612d 9684 trans->msg_type);
e5009240 9685 break;
3b49e2e9 9686 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9687 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 9688 nft_trans_flowtable(trans)->data.flags =
9689 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 9690 nf_tables_flowtable_notify(&trans->ctx,
9691 nft_trans_flowtable(trans),
9692 &nft_trans_flowtable_hooks(trans),
9693 NFT_MSG_NEWFLOWTABLE);
9694 list_splice(&nft_trans_flowtable_hooks(trans),
9695 &nft_trans_flowtable(trans)->hook_list);
9696 } else {
9697 nft_clear(net, nft_trans_flowtable(trans));
9698 nf_tables_flowtable_notify(&trans->ctx,
9699 nft_trans_flowtable(trans),
28339b21 9700 NULL,
78d9f48f
PNA		 9701 NFT_MSG_NEWFLOWTABLE);
9702 }
3b49e2e9
PNA		 9703 nft_trans_destroy(trans);
9704 break;
9705 case NFT_MSG_DELFLOWTABLE:
f80a612d 9706 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9707 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 9708 nf_tables_flowtable_notify(&trans->ctx,
9709 nft_trans_flowtable(trans),
9710 &nft_trans_flowtable_hooks(trans),
f80a612d 9711 trans->msg_type);
abadb2f8
PNA		 9712 nft_unregister_flowtable_net_hooks(net,
9713 &nft_trans_flowtable_hooks(trans));
9714 } else {
9715 list_del_rcu(&nft_trans_flowtable(trans)->list);
9716 nf_tables_flowtable_notify(&trans->ctx,
9717 nft_trans_flowtable(trans),
28339b21 9718 NULL,
f80a612d 9719 trans->msg_type);
abadb2f8
PNA		 9720 nft_unregister_flowtable_net_hooks(net,
9721 &nft_trans_flowtable(trans)->hook_list);
9722 }
3b49e2e9 9723 break;
37082f93 9724 }
37082f93
PNA		 9725 }
9726
212ed75d
PNA		 9727 nft_set_commit_update(&set_update_list);
9728
67cc570e 9729 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 9730 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 9731 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
0935d558 9732 nf_tables_commit_release(net);
37082f93
PNA		 9733
9734 return 0;
9735}
9736
eb014de4
PNA		 9737static void nf_tables_module_autoload(struct net *net)
9738{
d59d2f82 9739 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9740 struct nft_module_request *req, *next;
9741 LIST_HEAD(module_list);
9742
0854db2a
FW		 9743 list_splice_init(&nft_net->module_list, &module_list);
9744 mutex_unlock(&nft_net->commit_mutex);
eb014de4 9745 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 9746 request_module("%s", req->module);
9747 req->done = true;
eb014de4 9748 }
0854db2a
FW		 9749 mutex_lock(&nft_net->commit_mutex);
9750 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 9751}
9752
b326dd37 9753static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 9754{
c7c32e72
PNA		 9755 switch (trans->msg_type) {
9756 case NFT_MSG_NEWTABLE:
9757 nf_tables_table_destroy(&trans->ctx);
9758 break;
9759 case NFT_MSG_NEWCHAIN:
b9703ed4
PNA		 9760 if (nft_trans_chain_update(trans))
9761 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9762 else
9763 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9764 break;
9765 case NFT_MSG_NEWRULE:
9766 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9767 break;
9768 case NFT_MSG_NEWSET:
0c2a85ed 9769 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9770 break;
61edafbb
PM		 9771 case NFT_MSG_NEWSETELEM:
9772 nft_set_elem_destroy(nft_trans_elem_set(trans),
61f9e292 9773 nft_trans_elem(trans).priv, true);
61edafbb 9774 break;
e5009240 9775 case NFT_MSG_NEWOBJ:
00bfb320 9776 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9777 break;
3b49e2e9 9778 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9779 if (nft_trans_flowtable_update(trans))
cdc32546 9780 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
78d9f48f
PNA		 9781 else
9782 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9783 break;
c7c32e72
PNA		 9784 }
9785 kfree(trans);
9786}
9787
212ed75d
PNA		 9788static void nft_set_abort_update(struct list_head *set_update_list)
9789{
9790 struct nft_set *set, *next;
9791
9792 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
9793 list_del_init(&set->pending_update);
9794
9795 if (!set->ops->abort)
9796 continue;
9797
9798 set->ops->abort(set);
9799 }
9800}
9801
c0391b6a 9802static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 9803{
d59d2f82 9804 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9805 struct nft_trans *trans, *next;
212ed75d 9806 LIST_HEAD(set_update_list);
02263db0 9807 struct nft_trans_elem *te;
37082f93 9808
c0391b6a
PNA		 9809 if (action == NFNL_ABORT_VALIDATE &&
9810 nf_tables_validate(net) < 0)
9811 return -EAGAIN;
9812
0854db2a 9813 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 9814 list) {
b380e5c7 9815 switch (trans->msg_type) {
55dd6f93
PNA		 9816 case NFT_MSG_NEWTABLE:
9817 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9818 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9819 nft_trans_destroy(trans);
9820 break;
9821 }
9822 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 9823 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 9824 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
9825 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
9826 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
9827 }
9828 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 9829 nft_trans_destroy(trans);
9830 } else {
e688a7f8 9831 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 9832 }
9833 break;
9834 case NFT_MSG_DELTABLE:
f80a612d 9835 case NFT_MSG_DESTROYTABLE:
f2a6d766 9836 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 9837 nft_trans_destroy(trans);
9838 break;
91c7b38d
PNA		 9839 case NFT_MSG_NEWCHAIN:
9840 if (nft_trans_chain_update(trans)) {
b9703ed4
PNA		 9841 nft_netdev_unregister_hooks(net,
9842 &nft_trans_chain_hooks(trans),
9843 true);
982f4051 9844 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 9845 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 9846 nft_trans_destroy(trans);
9847 } else {
4bedf9ee 9848 if (nft_trans_chain_bound(trans)) {
d0e2c7de
PNA		 9849 nft_trans_destroy(trans);
9850 break;
9851 }
4fefee57 9852 trans->ctx.table->use--;
1b2470e5 9853 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 9854 nf_tables_unregister_hook(trans->ctx.net,
9855 trans->ctx.table,
9856 trans->ctx.chain);
91c7b38d
PNA		 9857 }
9858 break;
9859 case NFT_MSG_DELCHAIN:
f80a612d 9860 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9861 if (nft_trans_chain_update(trans)) {
9862 list_splice(&nft_trans_chain_hooks(trans),
9863 &nft_trans_basechain(trans)->hook_list);
9864 } else {
9865 trans->ctx.table->use++;
9866 nft_clear(trans->ctx.net, trans->ctx.chain);
9867 }
91c7b38d
PNA		 9868 nft_trans_destroy(trans);
9869 break;
b380e5c7 9870 case NFT_MSG_NEWRULE:
4bedf9ee
PNA		 9871 if (nft_trans_rule_bound(trans)) {
9872 nft_trans_destroy(trans);
9873 break;
9874 }
4fefee57 9875 trans->ctx.chain->use--;
b380e5c7 9876 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 9877 nft_rule_expr_deactivate(&trans->ctx,
9878 nft_trans_rule(trans),
9879 NFT_TRANS_ABORT);
3c5e4462
PNA		 9880 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9881 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 9882 break;
9883 case NFT_MSG_DELRULE:
f80a612d 9884 case NFT_MSG_DESTROYRULE:
4fefee57 9885 trans->ctx.chain->use++;
889f7ee7 9886 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 9887 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 9888 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9889 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9890
37082f93 9891 nft_trans_destroy(trans);
b380e5c7 9892 break;
958bee14 9893 case NFT_MSG_NEWSET:
123b9961
PNA		 9894 if (nft_trans_set_update(trans)) {
9895 nft_trans_destroy(trans);
9896 break;
9897 }
4fefee57 9898 trans->ctx.table->use--;
6a0a8d10 9899 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 9900 nft_trans_destroy(trans);
9901 break;
9902 }
9903 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 9904 break;
9905 case NFT_MSG_DELSET:
f80a612d 9906 case NFT_MSG_DESTROYSET:
4fefee57 9907 trans->ctx.table->use++;
37a9cc52 9908 nft_clear(trans->ctx.net, nft_trans_set(trans));
628bd3e4
PNA		 9909 if (nft_trans_set(trans)->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
9910 nft_map_activate(&trans->ctx, nft_trans_set(trans));
9911
958bee14
PNA		 9912 nft_trans_destroy(trans);
9913 break;
60319eb1 9914 case NFT_MSG_NEWSETELEM:
6a0a8d10 9915 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 9916 nft_trans_destroy(trans);
9917 break;
9918 }
02263db0 9919 te = (struct nft_trans_elem *)trans->data;
aaa31047
PNA		 9920 nft_setelem_remove(net, te->set, &te->elem);
9921 if (!nft_setelem_is_catchall(te->set, &te->elem))
9922 atomic_dec(&te->set->nelems);
212ed75d
PNA		 9923
9924 if (te->set->ops->abort &&
9925 list_empty(&te->set->pending_update)) {
9926 list_add_tail(&te->set->pending_update,
9927 &set_update_list);
9928 }
60319eb1
PNA		 9929 break;
9930 case NFT_MSG_DELSETELEM:
f80a612d 9931 case NFT_MSG_DESTROYSETELEM:
cc02e457
PM		 9932 te = (struct nft_trans_elem *)trans->data;
9933
f8bb7889 9934 nft_setelem_data_activate(net, te->set, &te->elem);
aaa31047
PNA		 9935 nft_setelem_activate(net, te->set, &te->elem);
9936 if (!nft_setelem_is_catchall(te->set, &te->elem))
9937 te->set->ndeact--;
cc02e457 9938
212ed75d
PNA		 9939 if (te->set->ops->abort &&
9940 list_empty(&te->set->pending_update)) {
9941 list_add_tail(&te->set->pending_update,
9942 &set_update_list);
9943 }
e5009240
PNA		 9944 nft_trans_destroy(trans);
9945 break;
9946 case NFT_MSG_NEWOBJ:
d62d0ba9 9947 if (nft_trans_obj_update(trans)) {
dad3bdee 9948 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 9949 nft_trans_destroy(trans);
9950 } else {
9951 trans->ctx.table->use--;
9952 nft_obj_del(nft_trans_obj(trans));
9953 }
e5009240
PNA		 9954 break;
9955 case NFT_MSG_DELOBJ:
f80a612d 9956 case NFT_MSG_DESTROYOBJ:
e5009240
PNA		 9957 trans->ctx.table->use++;
9958 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 9959 nft_trans_destroy(trans);
9960 break;
3b49e2e9 9961 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9962 if (nft_trans_flowtable_update(trans)) {
9963 nft_unregister_flowtable_net_hooks(net,
9964 &nft_trans_flowtable_hooks(trans));
9965 } else {
9966 trans->ctx.table->use--;
9967 list_del_rcu(&nft_trans_flowtable(trans)->list);
9968 nft_unregister_flowtable_net_hooks(net,
9969 &nft_trans_flowtable(trans)->hook_list);
9970 }
3b49e2e9
PNA		 9971 break;
9972 case NFT_MSG_DELFLOWTABLE:
f80a612d 9973 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9974 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 9975 list_splice(&nft_trans_flowtable_hooks(trans),
9976 &nft_trans_flowtable(trans)->hook_list);
abadb2f8
PNA		 9977 } else {
9978 trans->ctx.table->use++;
9979 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9980 }
3b49e2e9
PNA		 9981 nft_trans_destroy(trans);
9982 break;
37082f93 9983 }
37082f93
PNA		 9984 }
9985
212ed75d
PNA		 9986 nft_set_abort_update(&set_update_list);
9987
b326dd37
PNA		 9988 synchronize_rcu();
9989
a1cee076 9990 list_for_each_entry_safe_reverse(trans, next,
0854db2a 9991 &nft_net->commit_list, list) {
c7c32e72 9992 list_del(&trans->list);
b326dd37 9993 nf_tables_abort_release(trans);
37082f93
PNA		 9994 }
9995
c0391b6a 9996 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 9997 nf_tables_module_autoload(net);
9998 else
9999 nf_tables_module_autoload_cleanup(net);
10000
37082f93
PNA		 10001 return 0;
10002}
10003
c0391b6a
PNA		 10004static int nf_tables_abort(struct net *net, struct sk_buff *skb,
10005 enum nfnl_abort_action action)
71ad00c5 10006{
d59d2f82 10007 struct nftables_pernet *nft_net = nft_pernet(net);
c0391b6a 10008 int ret = __nf_tables_abort(net, action);
f102d66b 10009
0854db2a 10010 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 10011
10012 return ret;
71ad00c5
FW		 10013}
10014
74e8bcd2
PNA		 10015static bool nf_tables_valid_genid(struct net *net, u32 genid)
10016{
d59d2f82 10017 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 10018 bool genid_ok;
10019
0854db2a 10020 mutex_lock(&nft_net->commit_mutex);
f102d66b 10021
0854db2a 10022 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 10023 if (!genid_ok)
0854db2a 10024 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 10025
10026 /* else, commit mutex has to be released by commit or abort function */
10027 return genid_ok;
74e8bcd2
PNA		 10028}
10029
96518518
PM		 10030static const struct nfnetlink_subsystem nf_tables_subsys = {
10031 .name = "nf_tables",
10032 .subsys_id = NFNL_SUBSYS_NFTABLES,
10033 .cb_count = NFT_MSG_MAX,
10034 .cb = nf_tables_cb,
0628b123
PNA		 10035 .commit = nf_tables_commit,
10036 .abort = nf_tables_abort,
74e8bcd2 10037 .valid_genid = nf_tables_valid_genid,
be2ab5b4 10038 .owner = THIS_MODULE,
96518518
PM		 10039};
10040
7210e4e3 10041int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 10042 enum nft_chain_types type)
7210e4e3
PNA		 10043{
10044 const struct nft_base_chain *basechain;
10045
f323d954 10046 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 10047 basechain = nft_base_chain(chain);
10048 if (basechain->type->type != type)
10049 return -EOPNOTSUPP;
10050 }
10051 return 0;
10052}
10053EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
10054
75e8d06d
PNA		 10055int nft_chain_validate_hooks(const struct nft_chain *chain,
10056 unsigned int hook_flags)
10057{
10058 struct nft_base_chain *basechain;
10059
f323d954 10060 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 10061 basechain = nft_base_chain(chain);
10062
c974a3a3 10063 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 10064 return 0;
10065
10066 return -EOPNOTSUPP;
10067 }
10068
10069 return 0;
10070}
10071EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
10072
20a69341
PM		 10073/*
10074 * Loop detection - walk through the ruleset beginning at the destination chain
10075 * of a new jump until either the source chain is reached (loop) or all
10076 * reachable chains have been traversed.
10077 *
10078 * The loop check is performed whenever a new jump verdict is added to an
10079 * expression or verdict map or a verdict map is bound to a new chain.
10080 */
10081
10082static int nf_tables_check_loops(const struct nft_ctx *ctx,
10083 const struct nft_chain *chain);
10084
6387aa6e
PNA		 10085static int nft_check_loops(const struct nft_ctx *ctx,
10086 const struct nft_set_ext *ext)
10087{
10088 const struct nft_data *data;
10089 int ret;
10090
10091 data = nft_set_ext_data(ext);
10092 switch (data->verdict.code) {
10093 case NFT_JUMP:
10094 case NFT_GOTO:
10095 ret = nf_tables_check_loops(ctx, data->verdict.chain);
10096 break;
10097 default:
10098 ret = 0;
10099 break;
10100 }
10101
10102 return ret;
10103}
10104
20a69341 10105static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 10106 struct nft_set *set,
20a69341 10107 const struct nft_set_iter *iter,
de70185d 10108 struct nft_set_elem *elem)
20a69341 10109{
fe2811eb 10110 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
fe2811eb
PM		 10111
10112 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
10113 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 10114 return 0;
10115
6387aa6e 10116 return nft_check_loops(ctx, ext);
20a69341
PM		 10117}
10118
aaa31047
PNA		 10119static int nft_set_catchall_loops(const struct nft_ctx *ctx,
10120 struct nft_set *set)
10121{
10122 u8 genmask = nft_genmask_next(ctx->net);
10123 struct nft_set_elem_catchall *catchall;
10124 struct nft_set_ext *ext;
10125 int ret = 0;
10126
10127 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
10128 ext = nft_set_elem_ext(set, catchall->elem);
10129 if (!nft_set_elem_active(ext, genmask))
10130 continue;
10131
10132 ret = nft_check_loops(ctx, ext);
10133 if (ret < 0)
10134 return ret;
10135 }
10136
10137 return ret;
10138}
10139
20a69341
PM		 10140static int nf_tables_check_loops(const struct nft_ctx *ctx,
10141 const struct nft_chain *chain)
10142{
10143 const struct nft_rule *rule;
10144 const struct nft_expr *expr, *last;
de70185d 10145 struct nft_set *set;
20a69341
PM		 10146 struct nft_set_binding *binding;
10147 struct nft_set_iter iter;
20a69341
PM		 10148
10149 if (ctx->chain == chain)
10150 return -ELOOP;
10151
10152 list_for_each_entry(rule, &chain->rules, list) {
10153 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 10154 struct nft_immediate_expr *priv;
10155 const struct nft_data *data;
0ca743a5
PNA		 10156 int err;
10157
a654de8f 10158 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 10159 continue;
10160
a654de8f
PNA		 10161 priv = nft_expr_priv(expr);
10162 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 10163 continue;
20a69341 10164
a654de8f 10165 data = &priv->data;
1ca2e170 10166 switch (data->verdict.code) {
20a69341
PM		 10167 case NFT_JUMP:
10168 case NFT_GOTO:
1ca2e170
PM		 10169 err = nf_tables_check_loops(ctx,
10170 data->verdict.chain);
20a69341
PM		 10171 if (err < 0)
10172 return err;
c2168e6b 10173 break;
20a69341
PM		 10174 default:
10175 break;
10176 }
10177 }
10178 }
10179
10180 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 10181 if (!nft_is_active_next(ctx->net, set))
10182 continue;
20a69341
PM		 10183 if (!(set->flags & NFT_SET_MAP) ||
10184 set->dtype != NFT_DATA_VERDICT)
10185 continue;
10186
10187 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 10188 if (!(binding->flags & NFT_SET_MAP) ||
10189 binding->chain != chain)
20a69341
PM		 10190 continue;
10191
8588ac09 10192 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 10193 iter.skip = 0;
10194 iter.count = 0;
10195 iter.err = 0;
10196 iter.fn = nf_tables_loop_check_setelem;
10197
10198 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 10199 if (!iter.err)
10200 iter.err = nft_set_catchall_loops(ctx, set);
10201
20a69341
PM		 10202 if (iter.err < 0)
10203 return iter.err;
10204 }
10205 }
10206
10207 return 0;
10208}
10209
36b701fa
LGL		 10210/**
10211 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
10212 *
10213 * @attr: netlink attribute to fetch value from
10214 * @max: maximum value to be stored in dest
10215 * @dest: pointer to the variable
10216 *
10217 * Parse, check and store a given u32 netlink attribute into variable.
10218 * This function returns -ERANGE if the value goes over maximum value.
10219 * Otherwise a 0 is returned and the attribute value is stored in the
10220 * destination variable.
10221 */
f1d505bb 10222int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 10223{
09525a09 10224 u32 val;
36b701fa
LGL		 10225
10226 val = ntohl(nla_get_be32(attr));
10227 if (val > max)
10228 return -ERANGE;
10229
10230 *dest = val;
10231 return 0;
10232}
10233EXPORT_SYMBOL_GPL(nft_parse_u32_check);
10234
6c6f9f31 10235static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 10236{
49499c3e
PM		 10237 unsigned int reg;
10238
10239 reg = ntohl(nla_get_be32(attr));
10240 switch (reg) {
10241 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 10242 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
10243 break;
10244 case NFT_REG32_00...NFT_REG32_15:
10245 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
10246 break;
49499c3e 10247 default:
6e1acfa3 10248 return -ERANGE;
49499c3e 10249 }
6e1acfa3
PNA		 10250
10251 return 0;
b1c96ed3 10252}
b1c96ed3 10253
49499c3e
PM		 10254/**
10255 * nft_dump_register - dump a register value to a netlink attribute
10256 *
10257 * @skb: socket buffer
10258 * @attr: attribute number
10259 * @reg: register number
10260 *
10261 * Construct a netlink attribute containing the register number. For
10262 * compatibility reasons, register numbers being a multiple of 4 are
10263 * translated to the corresponding 128 bit register numbers.
10264 */
b1c96ed3
PM		 10265int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
10266{
49499c3e
PM		 10267 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
10268 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
10269 else
10270 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
10271
b1c96ed3
PM		 10272 return nla_put_be32(skb, attr, htonl(reg));
10273}
10274EXPORT_SYMBOL_GPL(nft_dump_register);
10275
4f16d25c 10276static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 10277{
49499c3e 10278 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 10279 return -EINVAL;
d07db988
PM		 10280 if (len == 0)
10281 return -EINVAL;
c593642c 10282 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 10283 return -ERANGE;
49499c3e 10284
96518518
PM		 10285 return 0;
10286}
4f16d25c
PNA		 10287
10288int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
10289{
10290 u32 reg;
10291 int err;
10292
6e1acfa3
PNA		 10293 err = nft_parse_register(attr, &reg);
10294 if (err < 0)
10295 return err;
10296
4f16d25c
PNA		 10297 err = nft_validate_register_load(reg, len);
10298 if (err < 0)
10299 return err;
10300
10301 *sreg = reg;
10302 return 0;
10303}
10304EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 10305
345023b0
PNA		 10306static int nft_validate_register_store(const struct nft_ctx *ctx,
10307 enum nft_registers reg,
10308 const struct nft_data *data,
10309 enum nft_data_types type,
10310 unsigned int len)
96518518 10311{
20a69341
PM		 10312 int err;
10313
96518518
PM		 10314 switch (reg) {
10315 case NFT_REG_VERDICT:
58f40ab6 10316 if (type != NFT_DATA_VERDICT)
96518518 10317 return -EINVAL;
20a69341 10318
58f40ab6 10319 if (data != NULL &&
1ca2e170
PM		 10320 (data->verdict.code == NFT_GOTO ||
10321 data->verdict.code == NFT_JUMP)) {
10322 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 10323 if (err < 0)
10324 return err;
20a69341
PM		 10325 }
10326
96518518
PM		 10327 return 0;
10328 default:
49499c3e 10329 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 10330 return -EINVAL;
45d9bcda
PM		 10331 if (len == 0)
10332 return -EINVAL;
49499c3e 10333 if (reg * NFT_REG32_SIZE + len >
c593642c 10334 sizeof_field(struct nft_regs, data))
45d9bcda 10335 return -ERANGE;
27e6d201 10336
96518518
PM		 10337 if (data != NULL && type != NFT_DATA_VALUE)
10338 return -EINVAL;
10339 return 0;
10340 }
10341}
345023b0
PNA		 10342
10343int nft_parse_register_store(const struct nft_ctx *ctx,
10344 const struct nlattr *attr, u8 *dreg,
10345 const struct nft_data *data,
10346 enum nft_data_types type, unsigned int len)
10347{
10348 int err;
10349 u32 reg;
10350
6e1acfa3
PNA		 10351 err = nft_parse_register(attr, &reg);
10352 if (err < 0)
10353 return err;
10354
345023b0
PNA		 10355 err = nft_validate_register_store(ctx, reg, data, type, len);
10356 if (err < 0)
10357 return err;
10358
10359 *dreg = reg;
10360 return 0;
10361}
10362EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 10363
10364static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
10365 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
10366 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
10367 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 10368 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 10369};
10370
10371static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
10372 struct nft_data_desc *desc, const struct nlattr *nla)
10373{
664b0f8c 10374 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 10375 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
10376 struct nft_chain *chain;
10377 int err;
10378
8cb08174
JB		 10379 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
10380 nft_verdict_policy, NULL);
96518518
PM		 10381 if (err < 0)
10382 return err;
10383
10384 if (!tb[NFTA_VERDICT_CODE])
10385 return -EINVAL;
1ca2e170 10386 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 10387
1ca2e170 10388 switch (data->verdict.code) {
e0abdadc 10389 default:
1ca2e170 10390 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 10391 case NF_ACCEPT:
10392 case NF_DROP:
10393 case NF_QUEUE:
10394 break;
10395 default:
10396 return -EINVAL;
10397 }
954d8297 10398 fallthrough;
96518518
PM		 10399 case NFT_CONTINUE:
10400 case NFT_BREAK:
10401 case NFT_RETURN:
96518518
PM		 10402 break;
10403 case NFT_JUMP:
10404 case NFT_GOTO:
51d70f18
PNA		 10405 if (tb[NFTA_VERDICT_CHAIN]) {
10406 chain = nft_chain_lookup(ctx->net, ctx->table,
10407 tb[NFTA_VERDICT_CHAIN],
10408 genmask);
10409 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 10410 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
51d70f18
PNA		 10411 tb[NFTA_VERDICT_CHAIN_ID]);
10412 if (IS_ERR(chain))
10413 return PTR_ERR(chain);
10414 } else {
96518518 10415 return -EINVAL;
51d70f18
PNA		 10416 }
10417
96518518
PM		 10418 if (IS_ERR(chain))
10419 return PTR_ERR(chain);
f323d954 10420 if (nft_is_base_chain(chain))
96518518 10421 return -EOPNOTSUPP;
e02f0d39
PNA		 10422 if (nft_chain_is_bound(chain))
10423 return -EINVAL;
f323ef3a
PNA		 10424 if (desc->flags & NFT_DATA_DESC_SETELEM &&
10425 chain->flags & NFT_CHAIN_BINDING)
10426 return -EINVAL;
96518518 10427
96518518 10428 chain->use++;
1ca2e170 10429 data->verdict.chain = chain;
96518518 10430 break;
96518518
PM		 10431 }
10432
4c4ed074 10433 desc->len = sizeof(data->verdict);
341b6941 10434
96518518
PM		 10435 return 0;
10436}
10437
10438static void nft_verdict_uninit(const struct nft_data *data)
10439{
d0e2c7de 10440 struct nft_chain *chain;
d0e2c7de 10441
1ca2e170 10442 switch (data->verdict.code) {
96518518
PM		 10443 case NFT_JUMP:
10444 case NFT_GOTO:
d0e2c7de
PNA		 10445 chain = data->verdict.chain;
10446 chain->use--;
96518518
PM		 10447 break;
10448 }
10449}
10450
33d5a7b1 10451int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 10452{
10453 struct nlattr *nest;
10454
ae0be8de 10455 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 10456 if (!nest)
10457 goto nla_put_failure;
10458
33d5a7b1 10459 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 10460 goto nla_put_failure;
10461
33d5a7b1 10462 switch (v->code) {
96518518
PM		 10463 case NFT_JUMP:
10464 case NFT_GOTO:
1ca2e170 10465 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 10466 v->chain->name))
96518518
PM		 10467 goto nla_put_failure;
10468 }
10469 nla_nest_end(skb, nest);
10470 return 0;
10471
10472nla_put_failure:
10473 return -1;
10474}
10475
d0a11fc3 10476static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 10477 struct nft_data *data, struct nft_data_desc *desc,
10478 const struct nlattr *nla)
96518518
PM		 10479{
10480 unsigned int len;
10481
10482 len = nla_len(nla);
10483 if (len == 0)
10484 return -EINVAL;
341b6941 10485 if (len > desc->size)
96518518 10486 return -EOVERFLOW;
341b6941
PNA		 10487 if (desc->len) {
10488 if (len != desc->len)
10489 return -EINVAL;
10490 } else {
10491 desc->len = len;
10492 }
96518518 10493
d0a11fc3 10494 nla_memcpy(data->data, nla, len);
341b6941 10495
96518518
PM		 10496 return 0;
10497}
10498
10499static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
10500 unsigned int len)
10501{
10502 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
10503}
10504
10505static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 10506 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 10507 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
10508};
10509
10510/**
10511 * nft_data_init - parse nf_tables data netlink attributes
10512 *
10513 * @ctx: context of the expression using the data
10514 * @data: destination struct nft_data
10515 * @desc: data description
10516 * @nla: netlink attribute containing data
10517 *
10518 * Parse the netlink data attributes and initialize a struct nft_data.
10519 * The type and length of data are returned in the data description.
10520 *
10521 * The caller can indicate that it only wants to accept data of type
10522 * NFT_DATA_VALUE by passing NULL for the ctx argument.
10523 */
341b6941 10524int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 10525 struct nft_data_desc *desc, const struct nlattr *nla)
10526{
10527 struct nlattr *tb[NFTA_DATA_MAX + 1];
10528 int err;
10529
341b6941
PNA		 10530 if (WARN_ON_ONCE(!desc->size))
10531 return -EINVAL;
10532
8cb08174
JB		 10533 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
10534 nft_data_policy, NULL);
96518518
PM		 10535 if (err < 0)
10536 return err;
10537
341b6941
PNA		 10538 if (tb[NFTA_DATA_VALUE]) {
10539 if (desc->type != NFT_DATA_VALUE)
10540 return -EINVAL;
10541
10542 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
10543 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
10544 if (desc->type != NFT_DATA_VERDICT)
10545 return -EINVAL;
10546
10547 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
10548 } else {
10549 err = -EINVAL;
10550 }
10551
10552 return err;
96518518
PM		 10553}
10554EXPORT_SYMBOL_GPL(nft_data_init);
10555
10556/**
59105446 10557 * nft_data_release - release a nft_data item
96518518
PM		 10558 *
10559 * @data: struct nft_data to release
10560 * @type: type of data
10561 *
10562 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
10563 * all others need to be released by calling this function.
10564 */
59105446 10565void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 10566{
960bd2c2 10567 if (type < NFT_DATA_VERDICT)
96518518 10568 return;
960bd2c2 10569 switch (type) {
96518518
PM		 10570 case NFT_DATA_VERDICT:
10571 return nft_verdict_uninit(data);
10572 default:
10573 WARN_ON(1);
10574 }
10575}
59105446 10576EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 10577
10578int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
10579 enum nft_data_types type, unsigned int len)
10580{
10581 struct nlattr *nest;
10582 int err;
10583
ae0be8de 10584 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 10585 if (nest == NULL)
10586 return -1;
10587
10588 switch (type) {
10589 case NFT_DATA_VALUE:
10590 err = nft_value_dump(skb, data, len);
10591 break;
10592 case NFT_DATA_VERDICT:
33d5a7b1 10593 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 10594 break;
10595 default:
10596 err = -EINVAL;
10597 WARN_ON(1);
10598 }
10599
10600 nla_nest_end(skb, nest);
10601 return err;
10602}
10603EXPORT_SYMBOL_GPL(nft_data_dump);
10604
5ebe0b0e
PNA		 10605int __nft_release_basechain(struct nft_ctx *ctx)
10606{
10607 struct nft_rule *rule, *nr;
10608
fa5950e4
FW		 10609 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
10610 return 0;
5ebe0b0e 10611
c974a3a3 10612 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 10613 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
10614 list_del(&rule->list);
10615 ctx->chain->use--;
bb7b40ae 10616 nf_tables_rule_release(ctx, rule);
5ebe0b0e 10617 }
1b2470e5 10618 nft_chain_del(ctx->chain);
5ebe0b0e 10619 ctx->table->use--;
43a605f2 10620 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 10621
10622 return 0;
10623}
10624EXPORT_SYMBOL_GPL(__nft_release_basechain);
10625
00dfe9be
PNA		 10626static void __nft_release_hook(struct net *net, struct nft_table *table)
10627{
6069da44 10628 struct nft_flowtable *flowtable;
00dfe9be
PNA		 10629 struct nft_chain *chain;
10630
10631 list_for_each_entry(chain, &table->chains, list)
f9a43007 10632 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 10633 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 10634 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
10635 true);
00dfe9be
PNA		 10636}
10637
767d1216
PNA		 10638static void __nft_release_hooks(struct net *net)
10639{
d59d2f82 10640 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 10641 struct nft_table *table;
767d1216 10642
0854db2a 10643 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 10644 if (nft_table_has_owner(table))
10645 continue;
10646
00dfe9be 10647 __nft_release_hook(net, table);
2888b080 10648 }
767d1216
PNA		 10649}
10650
fd020332 10651static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 10652{
3b49e2e9 10653 struct nft_flowtable *flowtable, *nf;
df05ef87 10654 struct nft_chain *chain, *nc;
e5009240 10655 struct nft_object *obj, *ne;
df05ef87
PNA		 10656 struct nft_rule *rule, *nr;
10657 struct nft_set *set, *ns;
10658 struct nft_ctx ctx = {
10659 .net = net,
43a605f2 10660 .family = NFPROTO_NETDEV,
df05ef87
PNA		 10661 };
10662
fd020332
PNA		 10663 ctx.family = table->family;
10664 ctx.table = table;
10665 list_for_each_entry(chain, &table->chains, list) {
10666 ctx.chain = chain;
10667 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
10668 list_del(&rule->list);
10669 chain->use--;
10670 nf_tables_rule_release(&ctx, rule);
df05ef87 10671 }
df05ef87 10672 }
fd020332
PNA		 10673 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
10674 list_del(&flowtable->list);
10675 table->use--;
10676 nf_tables_flowtable_destroy(flowtable);
10677 }
10678 list_for_each_entry_safe(set, ns, &table->sets, list) {
10679 list_del(&set->list);
10680 table->use--;
628bd3e4
PNA		 10681 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
10682 nft_map_deactivate(&ctx, set);
10683
fd020332
PNA		 10684 nft_set_destroy(&ctx, set);
10685 }
10686 list_for_each_entry_safe(obj, ne, &table->objects, list) {
10687 nft_obj_del(obj);
10688 table->use--;
10689 nft_obj_destroy(&ctx, obj);
10690 }
10691 list_for_each_entry_safe(chain, nc, &table->chains, list) {
10692 ctx.chain = chain;
10693 nft_chain_del(chain);
10694 table->use--;
10695 nf_tables_chain_destroy(&ctx);
10696 }
fd020332
PNA		 10697 nf_tables_table_destroy(&ctx);
10698}
10699
bd1777b3 10700static void __nft_release_tables(struct net *net)
fd020332 10701{
d59d2f82 10702 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 10703 struct nft_table *table, *nt;
10704
0854db2a 10705 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 10706 if (nft_table_has_owner(table))
6001a930
PNA		 10707 continue;
10708
a499b03b
FW		 10709 list_del(&table->list);
10710
fd020332 10711 __nft_release_table(net, table);
6001a930
PNA		 10712 }
10713}
10714
10715static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
10716 void *ptr)
10717{
a499b03b 10718 struct nft_table *table, *to_delete[8];
0854db2a 10719 struct nftables_pernet *nft_net;
6001a930 10720 struct netlink_notify *n = ptr;
6001a930 10721 struct net *net = n->net;
a499b03b
FW		 10722 unsigned int deleted;
10723 bool restart = false;
6001a930
PNA		 10724
10725 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
10726 return NOTIFY_DONE;
10727
d59d2f82 10728 nft_net = nft_pernet(net);
a499b03b 10729 deleted = 0;
0854db2a 10730 mutex_lock(&nft_net->commit_mutex);
d4bc8271
PNA		 10731 if (!list_empty(&nf_tables_destroy_list))
10732 rcu_barrier();
a499b03b 10733again:
0854db2a 10734 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 10735 if (nft_table_has_owner(table) &&
10736 n->portid == table->nlpid) {
10737 __nft_release_hook(net, table);
a499b03b
FW		 10738 list_del_rcu(&table->list);
10739 to_delete[deleted++] = table;
10740 if (deleted >= ARRAY_SIZE(to_delete))
10741 break;
6001a930
PNA		 10742 }
10743 }
a499b03b
FW		 10744 if (deleted) {
10745 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 10746 synchronize_rcu();
a499b03b
FW		 10747 while (deleted)
10748 __nft_release_table(net, to_delete[--deleted]);
10749
10750 if (restart)
10751 goto again;
6001a930 10752 }
0854db2a 10753 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 10754
10755 return NOTIFY_DONE;
df05ef87
PNA		 10756}
10757
6001a930
PNA		 10758static struct notifier_block nft_nl_notifier = {
10759 .notifier_call = nft_rcv_nl_event,
10760};
10761
dd4cbef7
PNA		 10762static int __net_init nf_tables_init_net(struct net *net)
10763{
d59d2f82 10764 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10765
10766 INIT_LIST_HEAD(&nft_net->tables);
10767 INIT_LIST_HEAD(&nft_net->commit_list);
10768 INIT_LIST_HEAD(&nft_net->module_list);
10769 INIT_LIST_HEAD(&nft_net->notify_list);
10770 mutex_init(&nft_net->commit_mutex);
10771 nft_net->base_seq = 1;
a654de8f 10772
dd4cbef7
PNA		 10773 return 0;
10774}
10775
767d1216
PNA		 10776static void __net_exit nf_tables_pre_exit_net(struct net *net)
10777{
3923b1e4
PNA		 10778 struct nftables_pernet *nft_net = nft_pernet(net);
10779
10780 mutex_lock(&nft_net->commit_mutex);
767d1216 10781 __nft_release_hooks(net);
3923b1e4 10782 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 10783}
10784
dd4cbef7
PNA		 10785static void __net_exit nf_tables_exit_net(struct net *net)
10786{
d59d2f82 10787 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10788
10789 mutex_lock(&nft_net->commit_mutex);
03c1f1ef
SY		 10790 if (!list_empty(&nft_net->commit_list) ||
10791 !list_empty(&nft_net->module_list))
c0391b6a 10792 __nf_tables_abort(net, NFNL_ABORT_NONE);
bd1777b3 10793 __nft_release_tables(net);
0854db2a
FW		 10794 mutex_unlock(&nft_net->commit_mutex);
10795 WARN_ON_ONCE(!list_empty(&nft_net->tables));
10796 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
10797 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 10798}
10799
99633ab2 10800static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 10801 .init = nf_tables_init_net,
10802 .pre_exit = nf_tables_pre_exit_net,
10803 .exit = nf_tables_exit_net,
0854db2a
FW		 10804 .id = &nf_tables_net_id,
10805 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 10806};
10807
96518518
PM		 10808static int __init nf_tables_module_init(void)
10809{
10810 int err;
10811
d209df3e
FW		 10812 err = register_pernet_subsys(&nf_tables_net_ops);
10813 if (err < 0)
10814 return err;
10815
10816 err = nft_chain_filter_init();
10817 if (err < 0)
6001a930 10818 goto err_chain_filter;
02c7b25e 10819
96518518
PM		 10820 err = nf_tables_core_module_init();
10821 if (err < 0)
6001a930 10822 goto err_core_module;
96518518 10823
d209df3e 10824 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 10825 if (err < 0)
6001a930 10826 goto err_netdev_notifier;
96518518 10827
4d44175a
FW		 10828 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
10829 if (err < 0)
6001a930 10830 goto err_rht_objname;
4d44175a 10831
06d392cb 10832 err = nft_offload_init();
10833 if (err < 0)
6001a930
PNA		 10834 goto err_offload;
10835
10836 err = netlink_register_notifier(&nft_nl_notifier);
10837 if (err < 0)
10838 goto err_netlink_notifier;
06d392cb 10839
d209df3e
FW		 10840 /* must be last */
10841 err = nfnetlink_subsys_register(&nf_tables_subsys);
10842 if (err < 0)
6001a930 10843 goto err_nfnl_subsys;
3b49e2e9 10844
c1deb065 10845 nft_chain_route_init();
3474a2c6 10846
d209df3e 10847 return err;
6001a930
PNA		 10848
10849err_nfnl_subsys:
10850 netlink_unregister_notifier(&nft_nl_notifier);
10851err_netlink_notifier:
06d392cb 10852 nft_offload_exit();
6001a930 10853err_offload:
4d44175a 10854 rhltable_destroy(&nft_objname_ht);
6001a930 10855err_rht_objname:
d209df3e 10856 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 10857err_netdev_notifier:
96518518 10858 nf_tables_core_module_exit();
6001a930 10859err_core_module:
d209df3e 10860 nft_chain_filter_fini();
6001a930 10861err_chain_filter:
d209df3e 10862 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 10863 return err;
10864}
10865
10866static void __exit nf_tables_module_exit(void)
10867{
10868 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 10869 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 10870 nft_offload_exit();
3b49e2e9 10871 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 10872 nft_chain_filter_fini();
c1deb065 10873 nft_chain_route_fini();
71ad00c5 10874 unregister_pernet_subsys(&nf_tables_net_ops);
0935d558 10875 cancel_work_sync(&trans_destroy_work);
1b1bc49c 10876 rcu_barrier();
4d44175a 10877 rhltable_destroy(&nft_objname_ht);
96518518 10878 nf_tables_core_module_exit();
96518518
PM		 10879}
10880
10881module_init(nf_tables_module_init);
10882module_exit(nf_tables_module_exit);
10883
10884MODULE_LICENSE("GPL");
10885MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
10886MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Linux 6.x block layer and io_uring tree(s)