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Merge branches 'acpi-bus' and 'acpi-video'
[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 33static LIST_HEAD(nf_tables_destroy_list);
5f68718b 34static LIST_HEAD(nf_tables_gc_list);
0935d558 35static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
5f68718b 36static DEFINE_SPINLOCK(nf_tables_gc_list_lock);
96518518 37
a654de8f
PNA		 38enum {
39 NFT_VALIDATE_SKIP = 0,
40 NFT_VALIDATE_NEED,
41 NFT_VALIDATE_DO,
42};
43
4d44175a
FW		 44static struct rhltable nft_objname_ht;
45
1b2470e5
FW		 46static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
47static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
48static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
49
4d44175a
FW		 50static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
51static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
52static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
53
1b2470e5
FW		 54static const struct rhashtable_params nft_chain_ht_params = {
55 .head_offset = offsetof(struct nft_chain, rhlhead),
56 .key_offset = offsetof(struct nft_chain, name),
57 .hashfn = nft_chain_hash,
58 .obj_hashfn = nft_chain_hash_obj,
59 .obj_cmpfn = nft_chain_hash_cmp,
1b2470e5
FW		 60 .automatic_shrinking = true,
61};
62
4d44175a
FW		 63static const struct rhashtable_params nft_objname_ht_params = {
64 .head_offset = offsetof(struct nft_object, rhlhead),
65 .key_offset = offsetof(struct nft_object, key),
66 .hashfn = nft_objname_hash,
67 .obj_hashfn = nft_objname_hash_obj,
68 .obj_cmpfn = nft_objname_hash_cmp,
69 .automatic_shrinking = true,
70};
71
c520292f
RGB		 72struct nft_audit_data {
73 struct nft_table *table;
74 int entries;
75 int op;
76 struct list_head list;
77};
78
79static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
80 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
81 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
82 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
83 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
84 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
85 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
86 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
87 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
88 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
89 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
90 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
91 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
92 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
93 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
94 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
95 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
96 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
97 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
99 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
100 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
101 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
102 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
103 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
104 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
105};
106
00c320f9 107static void nft_validate_state_update(struct nft_table *table, u8 new_validate_state)
a654de8f 108{
00c320f9 109 switch (table->validate_state) {
a654de8f
PNA		 110 case NFT_VALIDATE_SKIP:
111 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
112 break;
113 case NFT_VALIDATE_NEED:
114 break;
115 case NFT_VALIDATE_DO:
116 if (new_validate_state == NFT_VALIDATE_NEED)
117 return;
118 }
119
00c320f9 120 table->validate_state = new_validate_state;
a654de8f 121}
0935d558
FW		 122static void nf_tables_trans_destroy_work(struct work_struct *w);
123static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
a654de8f 124
5f68718b
PNA		 125static void nft_trans_gc_work(struct work_struct *work);
126static DECLARE_WORK(trans_gc_work, nft_trans_gc_work);
127
7c95f6d8 128static void nft_ctx_init(struct nft_ctx *ctx,
633c9a84 129 struct net *net,
7c95f6d8
PNA		 130 const struct sk_buff *skb,
131 const struct nlmsghdr *nlh,
36596dad 132 u8 family,
7c95f6d8
PNA		 133 struct nft_table *table,
134 struct nft_chain *chain,
135 const struct nlattr * const *nla)
136{
633c9a84 137 ctx->net = net;
36596dad 138 ctx->family = family;
26b2f552 139 ctx->level = 0;
128ad332
PNA		 140 ctx->table = table;
141 ctx->chain = chain;
142 ctx->nla = nla;
143 ctx->portid = NETLINK_CB(skb).portid;
144 ctx->report = nlmsg_report(nlh);
c9626a2c 145 ctx->flags = nlh->nlmsg_flags;
128ad332 146 ctx->seq = nlh->nlmsg_seq;
7c95f6d8
PNA		 147}
148
8411b644
PNA		 149static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
150 int msg_type, u32 size, gfp_t gfp)
1081d11b
PNA		 151{
152 struct nft_trans *trans;
153
8411b644 154 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
1081d11b
PNA		 155 if (trans == NULL)
156 return NULL;
157
58007785 158 INIT_LIST_HEAD(&trans->list);
938154b9 159 INIT_LIST_HEAD(&trans->binding_list);
b380e5c7 160 trans->msg_type = msg_type;
1081d11b
PNA		 161 trans->ctx = *ctx;
162
163 return trans;
164}
165
8411b644
PNA		 166static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
167 int msg_type, u32 size)
168{
169 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
170}
171
938154b9 172static void nft_trans_list_del(struct nft_trans *trans)
1081d11b
PNA		 173{
174 list_del(&trans->list);
938154b9
PNA		 175 list_del(&trans->binding_list);
176}
177
178static void nft_trans_destroy(struct nft_trans *trans)
179{
180 nft_trans_list_del(trans);
1081d11b
PNA		 181 kfree(trans);
182}
183
26b5a571
PNA		 184static void __nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set,
185 bool bind)
f6ac8585 186{
0854db2a 187 struct nftables_pernet *nft_net;
f6ac8585
PNA		 188 struct net *net = ctx->net;
189 struct nft_trans *trans;
190
191 if (!nft_set_is_anonymous(set))
192 return;
193
d59d2f82 194 nft_net = nft_pernet(net);
0854db2a 195 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
6a0a8d10
PNA		 196 switch (trans->msg_type) {
197 case NFT_MSG_NEWSET:
198 if (nft_trans_set(trans) == set)
26b5a571 199 nft_trans_set_bound(trans) = bind;
6a0a8d10
PNA		 200 break;
201 case NFT_MSG_NEWSETELEM:
202 if (nft_trans_elem_set(trans) == set)
26b5a571 203 nft_trans_elem_set_bound(trans) = bind;
f6ac8585
PNA		 204 break;
205 }
206 }
207}
208
26b5a571
PNA		 209static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
210{
211 return __nft_set_trans_bind(ctx, set, true);
212}
213
214static void nft_set_trans_unbind(const struct nft_ctx *ctx, struct nft_set *set)
215{
216 return __nft_set_trans_bind(ctx, set, false);
217}
218
219static void __nft_chain_trans_bind(const struct nft_ctx *ctx,
220 struct nft_chain *chain, bool bind)
4bedf9ee
PNA		 221{
222 struct nftables_pernet *nft_net;
223 struct net *net = ctx->net;
224 struct nft_trans *trans;
225
226 if (!nft_chain_binding(chain))
227 return;
228
229 nft_net = nft_pernet(net);
230 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
231 switch (trans->msg_type) {
232 case NFT_MSG_NEWCHAIN:
233 if (nft_trans_chain(trans) == chain)
26b5a571 234 nft_trans_chain_bound(trans) = bind;
4bedf9ee
PNA		 235 break;
236 case NFT_MSG_NEWRULE:
237 if (trans->ctx.chain == chain)
26b5a571 238 nft_trans_rule_bound(trans) = bind;
4bedf9ee
PNA		 239 break;
240 }
241 }
242}
243
26b5a571
PNA		 244static void nft_chain_trans_bind(const struct nft_ctx *ctx,
245 struct nft_chain *chain)
246{
247 __nft_chain_trans_bind(ctx, chain, true);
248}
249
4bedf9ee
PNA		 250int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
251{
252 if (!nft_chain_binding(chain))
253 return 0;
254
255 if (nft_chain_binding(ctx->chain))
256 return -EOPNOTSUPP;
257
258 if (chain->bound)
259 return -EBUSY;
260
1689f259
PNA		 261 if (!nft_use_inc(&chain->use))
262 return -EMFILE;
263
4bedf9ee 264 chain->bound = true;
4bedf9ee
PNA		 265 nft_chain_trans_bind(ctx, chain);
266
267 return 0;
268}
269
26b5a571
PNA		 270void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
271{
272 __nft_chain_trans_bind(ctx, chain, false);
273}
274
d54725cd
PNA		 275static int nft_netdev_register_hooks(struct net *net,
276 struct list_head *hook_list)
277{
278 struct nft_hook *hook;
279 int err, j;
280
281 j = 0;
282 list_for_each_entry(hook, hook_list, list) {
283 err = nf_register_net_hook(net, &hook->ops);
284 if (err < 0)
285 goto err_register;
286
287 j++;
288 }
289 return 0;
290
291err_register:
292 list_for_each_entry(hook, hook_list, list) {
293 if (j-- <= 0)
294 break;
295
296 nf_unregister_net_hook(net, &hook->ops);
297 }
298 return err;
299}
300
301static void nft_netdev_unregister_hooks(struct net *net,
f9a43007
PNA		 302 struct list_head *hook_list,
303 bool release_netdev)
d54725cd 304{
f9a43007 305 struct nft_hook *hook, *next;
d54725cd 306
f9a43007 307 list_for_each_entry_safe(hook, next, hook_list, list) {
d54725cd 308 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 309 if (release_netdev) {
310 list_del(&hook->list);
311 kfree_rcu(hook, rcu);
312 }
313 }
d54725cd
PNA		 314}
315
c974a3a3
PNA		 316static int nf_tables_register_hook(struct net *net,
317 const struct nft_table *table,
318 struct nft_chain *chain)
d8ee8f7c 319{
d54725cd 320 struct nft_base_chain *basechain;
a37061a6 321 const struct nf_hook_ops *ops;
ae6153b5 322
d8ee8f7c 323 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 324 !nft_is_base_chain(chain))
d8ee8f7c
PNA		 325 return 0;
326
4e25ceb8
FW		 327 basechain = nft_base_chain(chain);
328 ops = &basechain->ops;
ae6153b5 329
4e25ceb8
FW		 330 if (basechain->type->ops_register)
331 return basechain->type->ops_register(net, ops);
332
d3519cb8 333 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
1e9451cb
FW		 334 return nft_netdev_register_hooks(net, &basechain->hook_list);
335
336 return nf_register_net_hook(net, &basechain->ops);
d8ee8f7c
PNA		 337}
338
f9a43007
PNA		 339static void __nf_tables_unregister_hook(struct net *net,
340 const struct nft_table *table,
341 struct nft_chain *chain,
342 bool release_netdev)
c5598794 343{
d54725cd 344 struct nft_base_chain *basechain;
4e25ceb8
FW		 345 const struct nf_hook_ops *ops;
346
d8ee8f7c 347 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 348 !nft_is_base_chain(chain))
d8ee8f7c 349 return;
4e25ceb8
FW		 350 basechain = nft_base_chain(chain);
351 ops = &basechain->ops;
d8ee8f7c 352
4e25ceb8
FW		 353 if (basechain->type->ops_unregister)
354 return basechain->type->ops_unregister(net, ops);
355
d3519cb8 356 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
f9a43007
PNA		 357 nft_netdev_unregister_hooks(net, &basechain->hook_list,
358 release_netdev);
1e9451cb
FW		 359 else
360 nf_unregister_net_hook(net, &basechain->ops);
c5598794
AB		 361}
362
f9a43007
PNA		 363static void nf_tables_unregister_hook(struct net *net,
364 const struct nft_table *table,
365 struct nft_chain *chain)
366{
367 return __nf_tables_unregister_hook(net, table, chain, false);
368}
369
0854db2a
FW		 370static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
371{
d59d2f82 372 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a 373
938154b9
PNA		 374 switch (trans->msg_type) {
375 case NFT_MSG_NEWSET:
376 if (!nft_trans_set_update(trans) &&
377 nft_set_is_anonymous(nft_trans_set(trans)))
378 list_add_tail(&trans->binding_list, &nft_net->binding_list);
379 break;
62e1e94b
PNA		 380 case NFT_MSG_NEWCHAIN:
381 if (!nft_trans_chain_update(trans) &&
382 nft_chain_binding(nft_trans_chain(trans)))
383 list_add_tail(&trans->binding_list, &nft_net->binding_list);
384 break;
938154b9
PNA		 385 }
386
0854db2a
FW		 387 list_add_tail(&trans->list, &nft_net->commit_list);
388}
389
ee01d542
AB		 390static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
391{
392 struct nft_trans *trans;
393
394 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
395 if (trans == NULL)
396 return -ENOMEM;
397
398 if (msg_type == NFT_MSG_NEWTABLE)
f2a6d766 399 nft_activate_next(ctx->net, ctx->table);
ee01d542 400
0854db2a 401 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 402 return 0;
403}
404
405static int nft_deltable(struct nft_ctx *ctx)
406{
407 int err;
408
409 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
410 if (err < 0)
411 return err;
412
f2a6d766 413 nft_deactivate_next(ctx->net, ctx->table);
ee01d542
AB		 414 return err;
415}
416
66293c46 417static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
ee01d542
AB		 418{
419 struct nft_trans *trans;
420
421 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
422 if (trans == NULL)
66293c46 423 return ERR_PTR(-ENOMEM);
ee01d542 424
74cccc3d 425 if (msg_type == NFT_MSG_NEWCHAIN) {
664b0f8c 426 nft_activate_next(ctx->net, ctx->chain);
ee01d542 427
74cccc3d
PNA		 428 if (ctx->nla[NFTA_CHAIN_ID]) {
429 nft_trans_chain_id(trans) =
430 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
431 }
432 }
4bedf9ee 433 nft_trans_chain(trans) = ctx->chain;
0854db2a 434 nft_trans_commit_list_add_tail(ctx->net, trans);
4bedf9ee 435
66293c46 436 return trans;
ee01d542
AB		 437}
438
439static int nft_delchain(struct nft_ctx *ctx)
440{
66293c46 441 struct nft_trans *trans;
ee01d542 442
66293c46
FW		 443 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
444 if (IS_ERR(trans))
445 return PTR_ERR(trans);
ee01d542 446
1689f259 447 nft_use_dec(&ctx->table->use);
664b0f8c 448 nft_deactivate_next(ctx->net, ctx->chain);
ee01d542 449
66293c46 450 return 0;
ee01d542
AB		 451}
452
4bedf9ee 453void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae
PNA		 454{
455 struct nft_expr *expr;
456
457 expr = nft_expr_first(rule);
31cc578a 458 while (nft_expr_more(rule, expr)) {
bb7b40ae
PNA		 459 if (expr->ops->activate)
460 expr->ops->activate(ctx, expr);
461
462 expr = nft_expr_next(expr);
463 }
464}
465
4bedf9ee
PNA		 466void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule,
467 enum nft_trans_phase phase)
bb7b40ae
PNA		 468{
469 struct nft_expr *expr;
470
471 expr = nft_expr_first(rule);
31cc578a 472 while (nft_expr_more(rule, expr)) {
bb7b40ae 473 if (expr->ops->deactivate)
f6ac8585 474 expr->ops->deactivate(ctx, expr, phase);
bb7b40ae
PNA		 475
476 expr = nft_expr_next(expr);
477 }
478}
479
ee01d542
AB		 480static int
481nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
482{
483 /* You cannot delete the same rule twice */
889f7ee7
PNA		 484 if (nft_is_active_next(ctx->net, rule)) {
485 nft_deactivate_next(ctx->net, rule);
1689f259 486 nft_use_dec(&ctx->chain->use);
ee01d542
AB		 487 return 0;
488 }
489 return -ENOENT;
490}
491
492static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
493 struct nft_rule *rule)
494{
495 struct nft_trans *trans;
496
497 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
498 if (trans == NULL)
499 return NULL;
500
1a94e38d
PNA		 501 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
502 nft_trans_rule_id(trans) =
503 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
504 }
ee01d542 505 nft_trans_rule(trans) = rule;
0854db2a 506 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 507
508 return trans;
509}
510
511static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
512{
63b48c73 513 struct nft_flow_rule *flow;
ee01d542
AB		 514 struct nft_trans *trans;
515 int err;
516
517 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
518 if (trans == NULL)
519 return -ENOMEM;
520
63b48c73
PNA		 521 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
522 flow = nft_flow_rule_create(ctx->net, rule);
523 if (IS_ERR(flow)) {
524 nft_trans_destroy(trans);
525 return PTR_ERR(flow);
526 }
527
528 nft_trans_flow_rule(trans) = flow;
529 }
530
ee01d542
AB		 531 err = nf_tables_delrule_deactivate(ctx, rule);
532 if (err < 0) {
533 nft_trans_destroy(trans);
534 return err;
535 }
f6ac8585 536 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
ee01d542
AB		 537
538 return 0;
539}
540
541static int nft_delrule_by_chain(struct nft_ctx *ctx)
542{
543 struct nft_rule *rule;
544 int err;
545
546 list_for_each_entry(rule, &ctx->chain->rules, list) {
23b7ca4f
PNA		 547 if (!nft_is_active_next(ctx->net, rule))
548 continue;
549
ee01d542
AB		 550 err = nft_delrule(ctx, rule);
551 if (err < 0)
552 return err;
553 }
554 return 0;
555}
556
123b9961
PNA		 557static int __nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
558 struct nft_set *set,
559 const struct nft_set_desc *desc)
ee01d542
AB		 560{
561 struct nft_trans *trans;
562
563 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
564 if (trans == NULL)
565 return -ENOMEM;
566
123b9961 567 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] && !desc) {
ee01d542
AB		 568 nft_trans_set_id(trans) =
569 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
37a9cc52 570 nft_activate_next(ctx->net, set);
ee01d542
AB		 571 }
572 nft_trans_set(trans) = set;
123b9961
PNA		 573 if (desc) {
574 nft_trans_set_update(trans) = true;
575 nft_trans_set_gc_int(trans) = desc->gc_int;
576 nft_trans_set_timeout(trans) = desc->timeout;
96b2ef9b 577 nft_trans_set_size(trans) = desc->size;
123b9961 578 }
0854db2a 579 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 580
581 return 0;
582}
583
123b9961
PNA		 584static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
585 struct nft_set *set)
586{
587 return __nft_trans_set_add(ctx, msg_type, set, NULL);
588}
589
628bd3e4
PNA		 590static int nft_mapelem_deactivate(const struct nft_ctx *ctx,
591 struct nft_set *set,
592 const struct nft_set_iter *iter,
593 struct nft_set_elem *elem)
594{
595 nft_setelem_data_deactivate(ctx->net, set, elem);
596
597 return 0;
598}
599
600struct nft_set_elem_catchall {
601 struct list_head list;
602 struct rcu_head rcu;
603 void *elem;
604};
605
606static void nft_map_catchall_deactivate(const struct nft_ctx *ctx,
607 struct nft_set *set)
608{
609 u8 genmask = nft_genmask_next(ctx->net);
610 struct nft_set_elem_catchall *catchall;
611 struct nft_set_elem elem;
612 struct nft_set_ext *ext;
613
614 list_for_each_entry(catchall, &set->catchall_list, list) {
615 ext = nft_set_elem_ext(set, catchall->elem);
616 if (!nft_set_elem_active(ext, genmask))
617 continue;
618
619 elem.priv = catchall->elem;
620 nft_setelem_data_deactivate(ctx->net, set, &elem);
621 break;
622 }
623}
624
625static void nft_map_deactivate(const struct nft_ctx *ctx, struct nft_set *set)
626{
627 struct nft_set_iter iter = {
628 .genmask = nft_genmask_next(ctx->net),
629 .fn = nft_mapelem_deactivate,
630 };
631
632 set->ops->walk(ctx, set, &iter);
633 WARN_ON_ONCE(iter.err);
634
635 nft_map_catchall_deactivate(ctx, set);
636}
637
cd5125d8 638static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
ee01d542
AB		 639{
640 int err;
641
642 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
643 if (err < 0)
644 return err;
645
628bd3e4
PNA		 646 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
647 nft_map_deactivate(ctx, set);
648
37a9cc52 649 nft_deactivate_next(ctx->net, set);
1689f259 650 nft_use_dec(&ctx->table->use);
ee01d542
AB		 651
652 return err;
653}
654
e5009240
PNA		 655static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
656 struct nft_object *obj)
657{
658 struct nft_trans *trans;
659
660 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
661 if (trans == NULL)
662 return -ENOMEM;
663
664 if (msg_type == NFT_MSG_NEWOBJ)
665 nft_activate_next(ctx->net, obj);
666
667 nft_trans_obj(trans) = obj;
0854db2a 668 nft_trans_commit_list_add_tail(ctx->net, trans);
e5009240
PNA		 669
670 return 0;
671}
672
673static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
674{
675 int err;
676
677 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
678 if (err < 0)
679 return err;
680
681 nft_deactivate_next(ctx->net, obj);
1689f259 682 nft_use_dec(&ctx->table->use);
e5009240
PNA		 683
684 return err;
685}
686
3b49e2e9
PNA		 687static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
688 struct nft_flowtable *flowtable)
689{
690 struct nft_trans *trans;
691
692 trans = nft_trans_alloc(ctx, msg_type,
693 sizeof(struct nft_trans_flowtable));
694 if (trans == NULL)
695 return -ENOMEM;
696
697 if (msg_type == NFT_MSG_NEWFLOWTABLE)
698 nft_activate_next(ctx->net, flowtable);
699
2c9e4559 700 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
3b49e2e9 701 nft_trans_flowtable(trans) = flowtable;
0854db2a 702 nft_trans_commit_list_add_tail(ctx->net, trans);
3b49e2e9
PNA		 703
704 return 0;
705}
706
707static int nft_delflowtable(struct nft_ctx *ctx,
708 struct nft_flowtable *flowtable)
709{
710 int err;
711
712 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
713 if (err < 0)
714 return err;
715
716 nft_deactivate_next(ctx->net, flowtable);
1689f259 717 nft_use_dec(&ctx->table->use);
3b49e2e9
PNA		 718
719 return err;
720}
721
34cc9e52
PNA		 722static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
723{
724 int i;
725
726 for (i = track->regs[dreg].num_reg; i > 0; i--)
727 __nft_reg_track_cancel(track, dreg - i);
728}
729
730static void __nft_reg_track_update(struct nft_regs_track *track,
731 const struct nft_expr *expr,
732 u8 dreg, u8 num_reg)
733{
734 track->regs[dreg].selector = expr;
735 track->regs[dreg].bitwise = NULL;
736 track->regs[dreg].num_reg = num_reg;
737}
738
739void nft_reg_track_update(struct nft_regs_track *track,
740 const struct nft_expr *expr, u8 dreg, u8 len)
741{
742 unsigned int regcount;
743 int i;
744
745 __nft_reg_track_clobber(track, dreg);
746
747 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
748 for (i = 0; i < regcount; i++, dreg++)
749 __nft_reg_track_update(track, expr, dreg, i);
750}
751EXPORT_SYMBOL_GPL(nft_reg_track_update);
752
753void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
754{
755 unsigned int regcount;
756 int i;
757
758 __nft_reg_track_clobber(track, dreg);
759
760 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
761 for (i = 0; i < regcount; i++, dreg++)
762 __nft_reg_track_cancel(track, dreg);
763}
764EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
765
766void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
767{
768 track->regs[dreg].selector = NULL;
769 track->regs[dreg].bitwise = NULL;
770 track->regs[dreg].num_reg = 0;
771}
772EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
773
96518518
PM		 774/*
775 * Tables
776 */
777
36596dad 778static struct nft_table *nft_table_lookup(const struct net *net,
f2a6d766 779 const struct nlattr *nla,
6001a930 780 u8 family, u8 genmask, u32 nlpid)
96518518 781{
0854db2a 782 struct nftables_pernet *nft_net;
96518518
PM		 783 struct nft_table *table;
784
cac20fcd
PNA		 785 if (nla == NULL)
786 return ERR_PTR(-EINVAL);
787
d59d2f82 788 nft_net = nft_pernet(net);
0854db2a
FW		 789 list_for_each_entry_rcu(table, &nft_net->tables, list,
790 lockdep_is_held(&nft_net->commit_mutex)) {
f2a6d766 791 if (!nla_strcmp(nla, table->name) &&
98319cb9 792 table->family == family &&
6001a930
PNA		 793 nft_active_genmask(table, genmask)) {
794 if (nft_table_has_owner(table) &&
53479909 795 nlpid && table->nlpid != nlpid)
6001a930
PNA		 796 return ERR_PTR(-EPERM);
797
96518518 798 return table;
6001a930 799 }
96518518 800 }
cac20fcd
PNA		 801
802 return ERR_PTR(-ENOENT);
96518518
PM		 803}
804
3ecbfd65
HS		 805static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
806 const struct nlattr *nla,
e31f072f 807 u8 genmask, u32 nlpid)
3ecbfd65 808{
0854db2a 809 struct nftables_pernet *nft_net;
3ecbfd65
HS		 810 struct nft_table *table;
811
d59d2f82 812 nft_net = nft_pernet(net);
0854db2a 813 list_for_each_entry(table, &nft_net->tables, list) {
3ecbfd65 814 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
e31f072f
PNA		 815 nft_active_genmask(table, genmask)) {
816 if (nft_table_has_owner(table) &&
817 nlpid && table->nlpid != nlpid)
818 return ERR_PTR(-EPERM);
819
3ecbfd65 820 return table;
e31f072f 821 }
3ecbfd65 822 }
3ecbfd65
HS		 823
824 return ERR_PTR(-ENOENT);
825}
826
96518518
PM		 827static inline u64 nf_tables_alloc_handle(struct nft_table *table)
828{
829 return ++table->hgenerator;
830}
831
32537e91 832static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
9370761c 833
82603549
PNA		 834static const struct nft_chain_type *
835__nft_chain_type_get(u8 family, enum nft_chain_types type)
836{
837 if (family >= NFPROTO_NUMPROTO ||
838 type >= NFT_CHAIN_T_MAX)
839 return NULL;
840
841 return chain_type[family][type];
842}
843
32537e91 844static const struct nft_chain_type *
1ea26cca 845__nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
9370761c 846{
82603549 847 const struct nft_chain_type *type;
9370761c
PNA		 848 int i;
849
baae3e62 850 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
82603549
PNA		 851 type = __nft_chain_type_get(family, i);
852 if (!type)
853 continue;
854 if (!nla_strcmp(nla, type->name))
855 return type;
9370761c 856 }
baae3e62 857 return NULL;
9370761c
PNA		 858}
859
eb014de4
PNA		 860struct nft_module_request {
861 struct list_head list;
862 char module[MODULE_NAME_LEN];
863 bool done;
864};
865
452238e8 866#ifdef CONFIG_MODULES
cefa31a9
FW		 867__printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
868 ...)
452238e8
FW		 869{
870 char module_name[MODULE_NAME_LEN];
0854db2a 871 struct nftables_pernet *nft_net;
eb014de4 872 struct nft_module_request *req;
452238e8
FW		 873 va_list args;
874 int ret;
875
452238e8
FW		 876 va_start(args, fmt);
877 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
878 va_end(args);
9332d27d 879 if (ret >= MODULE_NAME_LEN)
eb014de4 880 return 0;
452238e8 881
d59d2f82 882 nft_net = nft_pernet(net);
0854db2a 883 list_for_each_entry(req, &nft_net->module_list, list) {
eb014de4
PNA		 884 if (!strcmp(req->module, module_name)) {
885 if (req->done)
886 return 0;
ec7470b8 887
eb014de4
PNA		 888 /* A request to load this module already exists. */
889 return -EAGAIN;
890 }
891 }
892
893 req = kmalloc(sizeof(*req), GFP_KERNEL);
894 if (!req)
895 return -ENOMEM;
896
897 req->done = false;
8556bceb 898 strscpy(req->module, module_name, MODULE_NAME_LEN);
0854db2a 899 list_add_tail(&req->list, &nft_net->module_list);
eb014de4
PNA		 900
901 return -EAGAIN;
452238e8 902}
cefa31a9 903EXPORT_SYMBOL_GPL(nft_request_module);
452238e8
FW		 904#endif
905
f102d66b
FW		 906static void lockdep_nfnl_nft_mutex_not_held(void)
907{
908#ifdef CONFIG_PROVE_LOCKING
c0700dfa
FW		 909 if (debug_locks)
910 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
f102d66b
FW		 911#endif
912}
913
32537e91 914static const struct nft_chain_type *
452238e8
FW		 915nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
916 u8 family, bool autoload)
9370761c 917{
32537e91 918 const struct nft_chain_type *type;
9370761c 919
1ea26cca 920 type = __nf_tables_chain_type_lookup(nla, family);
93b0806f
PM		 921 if (type != NULL)
922 return type;
f102d66b
FW		 923
924 lockdep_nfnl_nft_mutex_not_held();
9370761c 925#ifdef CONFIG_MODULES
93b0806f 926 if (autoload) {
eb014de4
PNA		 927 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
928 nla_len(nla),
929 (const char *)nla_data(nla)) == -EAGAIN)
93b0806f 930 return ERR_PTR(-EAGAIN);
9370761c
PNA		 931 }
932#endif
93b0806f 933 return ERR_PTR(-ENOENT);
9370761c
PNA		 934}
935
802b8051
PNA		 936static __be16 nft_base_seq(const struct net *net)
937{
d59d2f82 938 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 939
940 return htons(nft_net->base_seq & 0xffff);
802b8051
PNA		 941}
942
96518518 943static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
1cae565e
PNA		 944 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
945 .len = NFT_TABLE_MAXNAMELEN - 1 },
9ddf6323 946 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
3ecbfd65 947 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
7a81575b
JGG		 948 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
949 .len = NFT_USERDATA_MAXLEN }
96518518
PM		 950};
951
84d7fce6
PNA		 952static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
953 u32 portid, u32 seq, int event, u32 flags,
954 int family, const struct nft_table *table)
96518518
PM		 955{
956 struct nlmsghdr *nlh;
96518518 957
dedb67c4 958 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 959 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
960 NFNETLINK_V0, nft_base_seq(net));
961 if (!nlh)
96518518
PM		 962 goto nla_put_failure;
963
9ddf6323 964 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
3ecbfd65
HS		 965 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
966 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
967 NFTA_TABLE_PAD))
96518518 968 goto nla_put_failure;
28339b21
PNA		 969
970 if (event == NFT_MSG_DELTABLE) {
971 nlmsg_end(skb, nlh);
972 return 0;
973 }
974
975 if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
976 htonl(table->flags & NFT_TABLE_F_MASK)))
977 goto nla_put_failure;
978
6001a930
PNA		 979 if (nft_table_has_owner(table) &&
980 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
981 goto nla_put_failure;
96518518 982
7a81575b
JGG		 983 if (table->udata) {
984 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
985 goto nla_put_failure;
986 }
987
053c095a
JB		 988 nlmsg_end(skb, nlh);
989 return 0;
96518518
PM		 990
991nla_put_failure:
992 nlmsg_trim(skb, nlh);
993 return -1;
994}
995
67cc570e
PNA		 996struct nftnl_skb_parms {
997 bool report;
998};
999#define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
1000
1001static void nft_notify_enqueue(struct sk_buff *skb, bool report,
1002 struct list_head *notify_list)
1003{
1004 NFT_CB(skb).report = report;
1005 list_add_tail(&skb->list, notify_list);
1006}
1007
25e94a99 1008static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
96518518 1009{
0854db2a 1010 struct nftables_pernet *nft_net;
96518518 1011 struct sk_buff *skb;
6fb721cf 1012 u16 flags = 0;
96518518
PM		 1013 int err;
1014
128ad332
PNA		 1015 if (!ctx->report &&
1016 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1017 return;
96518518 1018
96518518
PM		 1019 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1020 if (skb == NULL)
1021 goto err;
1022
6fb721cf
PNA		 1023 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1024 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1025
84d7fce6 1026 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1027 event, flags, ctx->family, ctx->table);
96518518
PM		 1028 if (err < 0) {
1029 kfree_skb(skb);
1030 goto err;
1031 }
1032
d59d2f82 1033 nft_net = nft_pernet(ctx->net);
0854db2a 1034 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1035 return;
96518518 1036err:
25e94a99 1037 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1038}
1039
1040static int nf_tables_dump_tables(struct sk_buff *skb,
1041 struct netlink_callback *cb)
1042{
1043 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
0854db2a 1044 struct nftables_pernet *nft_net;
96518518
PM		 1045 const struct nft_table *table;
1046 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1047 struct net *net = sock_net(skb->sk);
96518518
PM		 1048 int family = nfmsg->nfgen_family;
1049
e688a7f8 1050 rcu_read_lock();
d59d2f82 1051 nft_net = nft_pernet(net);
34002783 1052 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1053
0854db2a 1054 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1055 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1056 continue;
1057
36596dad
PNA		 1058 if (idx < s_idx)
1059 goto cont;
1060 if (idx > s_idx)
1061 memset(&cb->args[1], 0,
1062 sizeof(cb->args) - sizeof(cb->args[0]));
1063 if (!nft_is_active(net, table))
1064 continue;
1065 if (nf_tables_fill_table_info(skb, net,
1066 NETLINK_CB(cb->skb).portid,
1067 cb->nlh->nlmsg_seq,
1068 NFT_MSG_NEWTABLE, NLM_F_MULTI,
98319cb9 1069 table->family, table) < 0)
36596dad
PNA		 1070 goto done;
1071
1072 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1073cont:
36596dad 1074 idx++;
96518518
PM		 1075 }
1076done:
e688a7f8 1077 rcu_read_unlock();
96518518
PM		 1078 cb->args[0] = idx;
1079 return skb->len;
1080}
1081
d9adf22a
FW		 1082static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
1083 const struct nlmsghdr *nlh,
1084 struct netlink_dump_control *c)
1085{
1086 int err;
1087
1088 if (!try_module_get(THIS_MODULE))
1089 return -EINVAL;
1090
1091 rcu_read_unlock();
1092 err = netlink_dump_start(nlsk, skb, nlh, c);
1093 rcu_read_lock();
1094 module_put(THIS_MODULE);
1095
1096 return err;
1097}
1098
1099/* called with rcu_read_lock held */
797d4980
PNA		 1100static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
1101 const struct nlattr * const nla[])
96518518 1102{
797d4980
PNA		 1103 struct netlink_ext_ack *extack = info->extack;
1104 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1105 u8 family = info->nfmsg->nfgen_family;
96518518 1106 const struct nft_table *table;
797d4980 1107 struct net *net = info->net;
96518518 1108 struct sk_buff *skb2;
96518518
PM		 1109 int err;
1110
797d4980 1111 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1112 struct netlink_dump_control c = {
1113 .dump = nf_tables_dump_tables,
d9adf22a 1114 .module = THIS_MODULE,
96518518 1115 };
d9adf22a 1116
797d4980 1117 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1118 }
1119
6001a930 1120 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
36dd1bcc
PNA		 1121 if (IS_ERR(table)) {
1122 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
96518518 1123 return PTR_ERR(table);
36dd1bcc 1124 }
96518518 1125
d9adf22a 1126 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1127 if (!skb2)
1128 return -ENOMEM;
1129
84d7fce6 1130 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
797d4980
PNA		 1131 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
1132 0, family, table);
96518518 1133 if (err < 0)
ee921183 1134 goto err_fill_table_info;
96518518 1135
ee921183 1136 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1137
ee921183 1138err_fill_table_info:
96518518
PM		 1139 kfree_skb(skb2);
1140 return err;
1141}
1142
c9c17211 1143static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
10435c11
F		 1144{
1145 struct nft_chain *chain;
1146 u32 i = 0;
1147
1148 list_for_each_entry(chain, &table->chains, list) {
1149 if (!nft_is_active_next(net, chain))
1150 continue;
f323d954 1151 if (!nft_is_base_chain(chain))
10435c11
F		 1152 continue;
1153
1154 if (cnt && i++ == cnt)
1155 break;
1156
1e9451cb 1157 nf_tables_unregister_hook(net, table, chain);
10435c11
F		 1158 }
1159}
1160
c9c17211 1161static int nf_tables_table_enable(struct net *net, struct nft_table *table)
9ddf6323
PNA		 1162{
1163 struct nft_chain *chain;
1164 int err, i = 0;
1165
1166 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1167 if (!nft_is_active_next(net, chain))
1168 continue;
f323d954 1169 if (!nft_is_base_chain(chain))
d2012975
PNA		 1170 continue;
1171
1e9451cb 1172 err = nf_tables_register_hook(net, table, chain);
9ddf6323 1173 if (err < 0)
d54725cd 1174 goto err_register_hooks;
9ddf6323
PNA		 1175
1176 i++;
1177 }
1178 return 0;
d54725cd
PNA		 1179
1180err_register_hooks:
10435c11 1181 if (i)
c9c17211 1182 nft_table_disable(net, table, i);
9ddf6323
PNA		 1183 return err;
1184}
1185
c9c17211 1186static void nf_tables_table_disable(struct net *net, struct nft_table *table)
9ddf6323 1187{
179d9ba5 1188 table->flags &= ~NFT_TABLE_F_DORMANT;
c9c17211 1189 nft_table_disable(net, table, 0);
179d9ba5 1190 table->flags |= NFT_TABLE_F_DORMANT;
9ddf6323
PNA		 1191}
1192
179d9ba5
PNA		 1193#define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1194#define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1195#define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1196#define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1197 __NFT_TABLE_F_WAS_AWAKEN)
0ce7cf41 1198
e1aaca93 1199static int nf_tables_updtable(struct nft_ctx *ctx)
9ddf6323 1200{
55dd6f93 1201 struct nft_trans *trans;
e1aaca93 1202 u32 flags;
179d9ba5 1203 int ret;
9ddf6323 1204
e1aaca93
PNA		 1205 if (!ctx->nla[NFTA_TABLE_FLAGS])
1206 return 0;
9ddf6323 1207
e1aaca93 1208 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1209 if (flags & ~NFT_TABLE_F_MASK)
1210 return -EOPNOTSUPP;
e1aaca93 1211
63283dd2
PNA		 1212 if (flags == ctx->table->flags)
1213 return 0;
1214
9cc0001a
PNA		 1215 if ((nft_table_has_owner(ctx->table) &&
1216 !(flags & NFT_TABLE_F_OWNER)) ||
1217 (!nft_table_has_owner(ctx->table) &&
1218 flags & NFT_TABLE_F_OWNER))
1219 return -EOPNOTSUPP;
1220
55dd6f93
PNA		 1221 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1222 sizeof(struct nft_trans_table));
1223 if (trans == NULL)
1224 return -ENOMEM;
9ddf6323 1225
e1aaca93
PNA		 1226 if ((flags & NFT_TABLE_F_DORMANT) &&
1227 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
179d9ba5
PNA		 1228 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1229 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1230 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
e1aaca93
PNA		 1231 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1232 ctx->table->flags & NFT_TABLE_F_DORMANT) {
179d9ba5
PNA		 1233 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1234 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1235 ret = nf_tables_table_enable(ctx->net, ctx->table);
1236 if (ret < 0)
1237 goto err_register_hooks;
1238
1239 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1240 }
9ddf6323
PNA		 1241 }
1242
55dd6f93 1243 nft_trans_table_update(trans) = true;
0854db2a 1244 nft_trans_commit_list_add_tail(ctx->net, trans);
179d9ba5 1245
55dd6f93 1246 return 0;
179d9ba5
PNA		 1247
1248err_register_hooks:
55dd6f93 1249 nft_trans_destroy(trans);
9ddf6323
PNA		 1250 return ret;
1251}
1252
1b2470e5
FW		 1253static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1254{
1255 const char *name = data;
1256
1257 return jhash(name, strlen(name), seed);
1258}
1259
1260static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1261{
1262 const struct nft_chain *chain = data;
1263
1264 return nft_chain_hash(chain->name, 0, seed);
1265}
1266
1267static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1268 const void *ptr)
1269{
1270 const struct nft_chain *chain = ptr;
1271 const char *name = arg->key;
1272
1273 return strcmp(chain->name, name);
1274}
1275
4d44175a
FW		 1276static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1277{
1278 const struct nft_object_hash_key *k = data;
1279
1280 seed ^= hash_ptr(k->table, 32);
1281
1282 return jhash(k->name, strlen(k->name), seed);
1283}
1284
1285static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1286{
1287 const struct nft_object *obj = data;
1288
1289 return nft_objname_hash(&obj->key, 0, seed);
1290}
1291
1292static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1293 const void *ptr)
1294{
1295 const struct nft_object_hash_key *k = arg->key;
1296 const struct nft_object *obj = ptr;
1297
1298 if (obj->key.table != k->table)
1299 return -1;
1300
1301 return strcmp(obj->key.name, k->name);
1302}
1303
f1082dd3
PS		 1304static bool nft_supported_family(u8 family)
1305{
1306 return false
1307#ifdef CONFIG_NF_TABLES_INET
1308 || family == NFPROTO_INET
1309#endif
1310#ifdef CONFIG_NF_TABLES_IPV4
1311 || family == NFPROTO_IPV4
1312#endif
1313#ifdef CONFIG_NF_TABLES_ARP
1314 || family == NFPROTO_ARP
1315#endif
1316#ifdef CONFIG_NF_TABLES_NETDEV
1317 || family == NFPROTO_NETDEV
1318#endif
1319#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1320 || family == NFPROTO_BRIDGE
1321#endif
1322#ifdef CONFIG_NF_TABLES_IPV6
1323 || family == NFPROTO_IPV6
1324#endif
1325 ;
1326}
1327
7dab8ee3
PNA		 1328static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1329 const struct nlattr * const nla[])
96518518 1330{
7dab8ee3 1331 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 1332 struct netlink_ext_ack *extack = info->extack;
1333 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1334 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1335 struct net *net = info->net;
36dd1bcc
PNA		 1336 const struct nlattr *attr;
1337 struct nft_table *table;
e1aaca93 1338 struct nft_ctx ctx;
7a81575b 1339 u32 flags = 0;
55dd6f93 1340 int err;
96518518 1341
f1082dd3
PS		 1342 if (!nft_supported_family(family))
1343 return -EOPNOTSUPP;
1344
0854db2a 1345 lockdep_assert_held(&nft_net->commit_mutex);
36dd1bcc 1346 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1347 table = nft_table_lookup(net, attr, family, genmask,
1348 NETLINK_CB(skb).portid);
96518518
PM		 1349 if (IS_ERR(table)) {
1350 if (PTR_ERR(table) != -ENOENT)
1351 return PTR_ERR(table);
1a28ad74 1352 } else {
7dab8ee3 1353 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 1354 NL_SET_BAD_ATTR(extack, attr);
96518518 1355 return -EEXIST;
36dd1bcc 1356 }
7dab8ee3 1357 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518 1358 return -EOPNOTSUPP;
e1aaca93 1359
7dab8ee3
PNA		 1360 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1361
e1aaca93 1362 return nf_tables_updtable(&ctx);
96518518
PM		 1363 }
1364
c5c1f975
PM		 1365 if (nla[NFTA_TABLE_FLAGS]) {
1366 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1367 if (flags & ~NFT_TABLE_F_MASK)
1368 return -EOPNOTSUPP;
c5c1f975
PM		 1369 }
1370
ffdb210e 1371 err = -ENOMEM;
33758c89 1372 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
ffdb210e 1373 if (table == NULL)
98319cb9 1374 goto err_kzalloc;
96518518 1375
00c320f9 1376 table->validate_state = NFT_VALIDATE_SKIP;
33758c89 1377 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
e46abbcc 1378 if (table->name == NULL)
98319cb9 1379 goto err_strdup;
e46abbcc 1380
7a81575b 1381 if (nla[NFTA_TABLE_USERDATA]) {
33758c89 1382 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
7a81575b
JGG		 1383 if (table->udata == NULL)
1384 goto err_table_udata;
1385
85db827a 1386 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
7a81575b
JGG		 1387 }
1388
1b2470e5
FW		 1389 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1390 if (err)
1391 goto err_chain_ht;
1392
96518518 1393 INIT_LIST_HEAD(&table->chains);
20a69341 1394 INIT_LIST_HEAD(&table->sets);
e5009240 1395 INIT_LIST_HEAD(&table->objects);
3b49e2e9 1396 INIT_LIST_HEAD(&table->flowtables);
98319cb9 1397 table->family = family;
c5c1f975 1398 table->flags = flags;
ab482c6b 1399 table->handle = ++nft_net->table_handle;
6001a930
PNA		 1400 if (table->flags & NFT_TABLE_F_OWNER)
1401 table->nlpid = NETLINK_CB(skb).portid;
9ddf6323 1402
7dab8ee3 1403 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
55dd6f93 1404 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
ffdb210e 1405 if (err < 0)
98319cb9 1406 goto err_trans;
ffdb210e 1407
0854db2a 1408 list_add_tail_rcu(&table->list, &nft_net->tables);
96518518 1409 return 0;
98319cb9 1410err_trans:
1b2470e5
FW		 1411 rhltable_destroy(&table->chains_ht);
1412err_chain_ht:
7a81575b
JGG		 1413 kfree(table->udata);
1414err_table_udata:
e46abbcc 1415 kfree(table->name);
98319cb9 1416err_strdup:
ffdb210e 1417 kfree(table);
98319cb9 1418err_kzalloc:
ffdb210e 1419 return err;
96518518
PM		 1420}
1421
b9ac12ef
AB		 1422static int nft_flush_table(struct nft_ctx *ctx)
1423{
3b49e2e9 1424 struct nft_flowtable *flowtable, *nft;
b9ac12ef 1425 struct nft_chain *chain, *nc;
e5009240 1426 struct nft_object *obj, *ne;
b9ac12ef 1427 struct nft_set *set, *ns;
3b49e2e9 1428 int err;
b9ac12ef 1429
a2f18db0 1430 list_for_each_entry(chain, &ctx->table->chains, list) {
664b0f8c
PNA		 1431 if (!nft_is_active_next(ctx->net, chain))
1432 continue;
1433
d0e2c7de
PNA		 1434 if (nft_chain_is_bound(chain))
1435 continue;
1436
b9ac12ef
AB		 1437 ctx->chain = chain;
1438
1439 err = nft_delrule_by_chain(ctx);
1440 if (err < 0)
1441 goto out;
b9ac12ef
AB		 1442 }
1443
1444 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
37a9cc52
PNA		 1445 if (!nft_is_active_next(ctx->net, set))
1446 continue;
1447
408070d6 1448 if (nft_set_is_anonymous(set) &&
b9ac12ef
AB		 1449 !list_empty(&set->bindings))
1450 continue;
1451
1452 err = nft_delset(ctx, set);
1453 if (err < 0)
1454 goto out;
1455 }
1456
3b49e2e9 1457 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
335178d5
FW		 1458 if (!nft_is_active_next(ctx->net, flowtable))
1459 continue;
1460
3b49e2e9
PNA		 1461 err = nft_delflowtable(ctx, flowtable);
1462 if (err < 0)
1463 goto out;
1464 }
1465
e5009240 1466 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
335178d5
FW		 1467 if (!nft_is_active_next(ctx->net, obj))
1468 continue;
1469
e5009240
PNA		 1470 err = nft_delobj(ctx, obj);
1471 if (err < 0)
1472 goto out;
1473 }
1474
a2f18db0 1475 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
664b0f8c
PNA		 1476 if (!nft_is_active_next(ctx->net, chain))
1477 continue;
1478
d0e2c7de
PNA		 1479 if (nft_chain_is_bound(chain))
1480 continue;
1481
a2f18db0
PNA		 1482 ctx->chain = chain;
1483
1484 err = nft_delchain(ctx);
1485 if (err < 0)
1486 goto out;
1487 }
1488
b9ac12ef
AB		 1489 err = nft_deltable(ctx);
1490out:
1491 return err;
1492}
1493
1494static int nft_flush(struct nft_ctx *ctx, int family)
1495{
d59d2f82 1496 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
b9ac12ef 1497 const struct nlattr * const *nla = ctx->nla;
d59d2f82 1498 struct nft_table *table, *nt;
b9ac12ef
AB		 1499 int err = 0;
1500
0854db2a 1501 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
98319cb9 1502 if (family != AF_UNSPEC && table->family != family)
b9ac12ef
AB		 1503 continue;
1504
98319cb9 1505 ctx->family = table->family;
f2a6d766 1506
36596dad
PNA		 1507 if (!nft_is_active_next(ctx->net, table))
1508 continue;
b9ac12ef 1509
6001a930
PNA		 1510 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1511 continue;
1512
36596dad
PNA		 1513 if (nla[NFTA_TABLE_NAME] &&
1514 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1515 continue;
b9ac12ef 1516
36596dad
PNA		 1517 ctx->table = table;
1518
1519 err = nft_flush_table(ctx);
1520 if (err < 0)
1521 goto out;
b9ac12ef
AB		 1522 }
1523out:
1524 return err;
1525}
1526
7dab8ee3
PNA		 1527static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1528 const struct nlattr * const nla[])
96518518 1529{
7dab8ee3
PNA		 1530 struct netlink_ext_ack *extack = info->extack;
1531 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1532 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1533 struct net *net = info->net;
36dd1bcc
PNA		 1534 const struct nlattr *attr;
1535 struct nft_table *table;
55dd6f93 1536 struct nft_ctx ctx;
96518518 1537
7dab8ee3 1538 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
3ecbfd65
HS		 1539 if (family == AF_UNSPEC ||
1540 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
b9ac12ef
AB		 1541 return nft_flush(&ctx, family);
1542
36dd1bcc
PNA		 1543 if (nla[NFTA_TABLE_HANDLE]) {
1544 attr = nla[NFTA_TABLE_HANDLE];
e31f072f
PNA		 1545 table = nft_table_lookup_byhandle(net, attr, genmask,
1546 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 1547 } else {
1548 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1549 table = nft_table_lookup(net, attr, family, genmask,
1550 NETLINK_CB(skb).portid);
36dd1bcc 1551 }
3ecbfd65 1552
36dd1bcc 1553 if (IS_ERR(table)) {
f80a612d
FFM		 1554 if (PTR_ERR(table) == -ENOENT &&
1555 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
1556 return 0;
1557
36dd1bcc 1558 NL_SET_BAD_ATTR(extack, attr);
96518518 1559 return PTR_ERR(table);
36dd1bcc 1560 }
96518518 1561
7dab8ee3 1562 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
a8278400
PNA		 1563 table->use > 0)
1564 return -EBUSY;
1565
98319cb9 1566 ctx.family = family;
b9ac12ef 1567 ctx.table = table;
55dd6f93 1568
b9ac12ef 1569 return nft_flush_table(&ctx);
96518518
PM		 1570}
1571
55dd6f93
PNA		 1572static void nf_tables_table_destroy(struct nft_ctx *ctx)
1573{
fa5950e4
FW		 1574 if (WARN_ON(ctx->table->use > 0))
1575 return;
4fefee57 1576
1b2470e5 1577 rhltable_destroy(&ctx->table->chains_ht);
e46abbcc 1578 kfree(ctx->table->name);
bc7a7082 1579 kfree(ctx->table->udata);
55dd6f93 1580 kfree(ctx->table);
55dd6f93
PNA		 1581}
1582
cc07eeb0 1583void nft_register_chain_type(const struct nft_chain_type *ctype)
96518518 1584{
96518518 1585 nfnl_lock(NFNL_SUBSYS_NFTABLES);
82603549 1586 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
cc07eeb0
PNA		 1587 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1588 return;
96518518 1589 }
9370761c 1590 chain_type[ctype->family][ctype->type] = ctype;
96518518 1591 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
96518518 1592}
9370761c 1593EXPORT_SYMBOL_GPL(nft_register_chain_type);
96518518 1594
32537e91 1595void nft_unregister_chain_type(const struct nft_chain_type *ctype)
96518518 1596{
96518518 1597 nfnl_lock(NFNL_SUBSYS_NFTABLES);
9370761c 1598 chain_type[ctype->family][ctype->type] = NULL;
96518518
PM		 1599 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1600}
9370761c 1601EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
96518518
PM		 1602
1603/*
1604 * Chains
1605 */
1606
1607static struct nft_chain *
cac20fcd 1608nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
96518518
PM		 1609{
1610 struct nft_chain *chain;
1611
1612 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1613 if (chain->handle == handle &&
1614 nft_active_genmask(chain, genmask))
96518518
PM		 1615 return chain;
1616 }
1617
1618 return ERR_PTR(-ENOENT);
1619}
1620
4d44175a 1621static bool lockdep_commit_lock_is_held(const struct net *net)
f102d66b
FW		 1622{
1623#ifdef CONFIG_PROVE_LOCKING
d59d2f82 1624 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 1625
1626 return lockdep_is_held(&nft_net->commit_mutex);
f102d66b
FW		 1627#else
1628 return true;
1629#endif
1630}
1631
1632static struct nft_chain *nft_chain_lookup(struct net *net,
1633 struct nft_table *table,
cac20fcd 1634 const struct nlattr *nla, u8 genmask)
96518518 1635{
1b2470e5
FW		 1636 char search[NFT_CHAIN_MAXNAMELEN + 1];
1637 struct rhlist_head *tmp, *list;
96518518
PM		 1638 struct nft_chain *chain;
1639
1640 if (nla == NULL)
1641 return ERR_PTR(-EINVAL);
1642
872f6903 1643 nla_strscpy(search, nla, sizeof(search));
96518518 1644
1b2470e5 1645 WARN_ON(!rcu_read_lock_held() &&
f102d66b 1646 !lockdep_commit_lock_is_held(net));
1b2470e5
FW		 1647
1648 chain = ERR_PTR(-ENOENT);
1649 rcu_read_lock();
1650 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1651 if (!list)
1652 goto out_unlock;
1653
1654 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1655 if (nft_active_genmask(chain, genmask))
1656 goto out_unlock;
1657 }
1658 chain = ERR_PTR(-ENOENT);
1659out_unlock:
1660 rcu_read_unlock();
1661 return chain;
96518518
PM		 1662}
1663
1664static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
b2fbd044
LZ		 1665 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1666 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 1667 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1668 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1669 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1670 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
0ca743a5 1671 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
9332d27d
FW		 1672 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1673 .len = NFT_MODULE_AUTOLOAD_LIMIT },
0ca743a5 1674 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
c9626a2c 1675 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
74cccc3d 1676 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
002f2176
JGG		 1677 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1678 .len = NFT_USERDATA_MAXLEN },
96518518
PM		 1679};
1680
1681static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1682 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1683 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
2cbce139
PNA		 1684 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1685 .len = IFNAMSIZ - 1 },
96518518
PM		 1686};
1687
0ca743a5
PNA		 1688static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1689{
1690 struct nft_stats *cpu_stats, total;
1691 struct nlattr *nest;
ce355e20
ED		 1692 unsigned int seq;
1693 u64 pkts, bytes;
0ca743a5
PNA		 1694 int cpu;
1695
edbd82c5
FW		 1696 if (!stats)
1697 return 0;
1698
0ca743a5
PNA		 1699 memset(&total, 0, sizeof(total));
1700 for_each_possible_cpu(cpu) {
1701 cpu_stats = per_cpu_ptr(stats, cpu);
ce355e20 1702 do {
d120d1a6 1703 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
ce355e20
ED		 1704 pkts = cpu_stats->pkts;
1705 bytes = cpu_stats->bytes;
d120d1a6 1706 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
ce355e20
ED		 1707 total.pkts += pkts;
1708 total.bytes += bytes;
0ca743a5 1709 }
ae0be8de 1710 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
0ca743a5
PNA		 1711 if (nest == NULL)
1712 goto nla_put_failure;
1713
b46f6ded
ND		 1714 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1715 NFTA_COUNTER_PAD) ||
1716 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1717 NFTA_COUNTER_PAD))
0ca743a5
PNA		 1718 goto nla_put_failure;
1719
1720 nla_nest_end(skb, nest);
1721 return 0;
1722
1723nla_put_failure:
1724 return -ENOSPC;
1725}
1726
d54725cd 1727static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
b9703ed4
PNA		 1728 const struct nft_base_chain *basechain,
1729 const struct list_head *hook_list)
d54725cd
PNA		 1730{
1731 const struct nf_hook_ops *ops = &basechain->ops;
1732 struct nft_hook *hook, *first = NULL;
1733 struct nlattr *nest, *nest_devs;
1734 int n = 0;
1735
1736 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1737 if (nest == NULL)
1738 goto nla_put_failure;
1739 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1740 goto nla_put_failure;
1741 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1742 goto nla_put_failure;
1743
d3519cb8 1744 if (nft_base_chain_netdev(family, ops->hooknum)) {
d54725cd 1745 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
bd058763
GI		 1746 if (!nest_devs)
1747 goto nla_put_failure;
b9703ed4
PNA		 1748
1749 if (!hook_list)
1750 hook_list = &basechain->hook_list;
1751
1752 list_for_each_entry(hook, hook_list, list) {
d54725cd
PNA		 1753 if (!first)
1754 first = hook;
1755
1756 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1757 hook->ops.dev->name))
1758 goto nla_put_failure;
1759 n++;
1760 }
1761 nla_nest_end(skb, nest_devs);
1762
1763 if (n == 1 &&
1764 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1765 goto nla_put_failure;
1766 }
1767 nla_nest_end(skb, nest);
1768
1769 return 0;
1770nla_put_failure:
1771 return -1;
1772}
1773
84d7fce6
PNA		 1774static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1775 u32 portid, u32 seq, int event, u32 flags,
1776 int family, const struct nft_table *table,
b9703ed4
PNA		 1777 const struct nft_chain *chain,
1778 const struct list_head *hook_list)
96518518
PM		 1779{
1780 struct nlmsghdr *nlh;
96518518 1781
dedb67c4 1782 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 1783 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1784 NFNETLINK_V0, nft_base_seq(net));
1785 if (!nlh)
96518518
PM		 1786 goto nla_put_failure;
1787
28339b21
PNA		 1788 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name) ||
1789 nla_put_string(skb, NFTA_CHAIN_NAME, chain->name) ||
1790 nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
b46f6ded 1791 NFTA_CHAIN_PAD))
96518518 1792 goto nla_put_failure;
28339b21 1793
7d937b10 1794 if (event == NFT_MSG_DELCHAIN && !hook_list) {
28339b21
PNA		 1795 nlmsg_end(skb, nlh);
1796 return 0;
1797 }
96518518 1798
f323d954 1799 if (nft_is_base_chain(chain)) {
0ca743a5 1800 const struct nft_base_chain *basechain = nft_base_chain(chain);
edbd82c5 1801 struct nft_stats __percpu *stats;
0ca743a5 1802
b9703ed4 1803 if (nft_dump_basechain_hook(skb, family, basechain, hook_list))
2cbce139 1804 goto nla_put_failure;
9370761c 1805
0ca743a5
PNA		 1806 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1807 htonl(basechain->policy)))
1808 goto nla_put_failure;
1809
baae3e62
PM		 1810 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1811 goto nla_put_failure;
0ca743a5 1812
edbd82c5
FW		 1813 stats = rcu_dereference_check(basechain->stats,
1814 lockdep_commit_lock_is_held(net));
1815 if (nft_dump_stats(skb, stats))
0ca743a5 1816 goto nla_put_failure;
96518518
PM		 1817 }
1818
d0e2c7de
PNA		 1819 if (chain->flags &&
1820 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1821 goto nla_put_failure;
1822
0ca743a5
PNA		 1823 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1824 goto nla_put_failure;
1825
002f2176
JGG		 1826 if (chain->udata &&
1827 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1828 goto nla_put_failure;
1829
053c095a
JB		 1830 nlmsg_end(skb, nlh);
1831 return 0;
96518518
PM		 1832
1833nla_put_failure:
1834 nlmsg_trim(skb, nlh);
1835 return -1;
1836}
1837
b9703ed4
PNA		 1838static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event,
1839 const struct list_head *hook_list)
96518518 1840{
0854db2a 1841 struct nftables_pernet *nft_net;
96518518 1842 struct sk_buff *skb;
6fb721cf 1843 u16 flags = 0;
96518518
PM		 1844 int err;
1845
128ad332
PNA		 1846 if (!ctx->report &&
1847 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1848 return;
96518518 1849
96518518
PM		 1850 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1851 if (skb == NULL)
1852 goto err;
1853
6fb721cf
PNA		 1854 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1855 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1856
84d7fce6 1857 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1858 event, flags, ctx->family, ctx->table,
b9703ed4 1859 ctx->chain, hook_list);
96518518
PM		 1860 if (err < 0) {
1861 kfree_skb(skb);
1862 goto err;
1863 }
1864
d59d2f82 1865 nft_net = nft_pernet(ctx->net);
0854db2a 1866 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1867 return;
96518518 1868err:
25e94a99 1869 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1870}
1871
1872static int nf_tables_dump_chains(struct sk_buff *skb,
1873 struct netlink_callback *cb)
1874{
1875 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
96518518 1876 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1877 struct net *net = sock_net(skb->sk);
96518518 1878 int family = nfmsg->nfgen_family;
0854db2a 1879 struct nftables_pernet *nft_net;
d59d2f82
PNA		 1880 const struct nft_table *table;
1881 const struct nft_chain *chain;
96518518 1882
e688a7f8 1883 rcu_read_lock();
d59d2f82 1884 nft_net = nft_pernet(net);
34002783 1885 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1886
0854db2a 1887 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1888 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1889 continue;
1890
36596dad
PNA		 1891 list_for_each_entry_rcu(chain, &table->chains, list) {
1892 if (idx < s_idx)
1893 goto cont;
1894 if (idx > s_idx)
1895 memset(&cb->args[1], 0,
1896 sizeof(cb->args) - sizeof(cb->args[0]));
1897 if (!nft_is_active(net, chain))
1898 continue;
1899 if (nf_tables_fill_chain_info(skb, net,
1900 NETLINK_CB(cb->skb).portid,
1901 cb->nlh->nlmsg_seq,
1902 NFT_MSG_NEWCHAIN,
1903 NLM_F_MULTI,
98319cb9 1904 table->family, table,
b9703ed4 1905 chain, NULL) < 0)
36596dad 1906 goto done;
38e029f1 1907
36596dad 1908 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1909cont:
36596dad 1910 idx++;
96518518
PM		 1911 }
1912 }
1913done:
e688a7f8 1914 rcu_read_unlock();
96518518
PM		 1915 cb->args[0] = idx;
1916 return skb->len;
1917}
1918
d9adf22a 1919/* called with rcu_read_lock held */
797d4980
PNA		 1920static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1921 const struct nlattr * const nla[])
96518518 1922{
797d4980
PNA		 1923 struct netlink_ext_ack *extack = info->extack;
1924 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1925 u8 family = info->nfmsg->nfgen_family;
96518518 1926 const struct nft_chain *chain;
797d4980 1927 struct net *net = info->net;
1b2470e5 1928 struct nft_table *table;
96518518 1929 struct sk_buff *skb2;
96518518
PM		 1930 int err;
1931
797d4980 1932 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1933 struct netlink_dump_control c = {
1934 .dump = nf_tables_dump_chains,
d9adf22a 1935 .module = THIS_MODULE,
96518518 1936 };
d9adf22a 1937
797d4980 1938 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1939 }
1940
6001a930 1941 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
36dd1bcc
PNA		 1942 if (IS_ERR(table)) {
1943 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 1944 return PTR_ERR(table);
36dd1bcc 1945 }
96518518 1946
f102d66b 1947 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
36dd1bcc
PNA		 1948 if (IS_ERR(chain)) {
1949 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
96518518 1950 return PTR_ERR(chain);
36dd1bcc 1951 }
96518518 1952
d9adf22a 1953 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1954 if (!skb2)
1955 return -ENOMEM;
1956
84d7fce6 1957 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 1958 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
b9703ed4 1959 0, family, table, chain, NULL);
96518518 1960 if (err < 0)
ee921183 1961 goto err_fill_chain_info;
96518518 1962
ee921183 1963 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1964
ee921183 1965err_fill_chain_info:
96518518
PM		 1966 kfree_skb(skb2);
1967 return err;
1968}
1969
0ca743a5
PNA		 1970static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1971 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1972 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1973};
1974
ff3cd7b3 1975static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
0ca743a5
PNA		 1976{
1977 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1978 struct nft_stats __percpu *newstats;
1979 struct nft_stats *stats;
1980 int err;
1981
8cb08174
JB		 1982 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1983 nft_counter_policy, NULL);
0ca743a5 1984 if (err < 0)
ff3cd7b3 1985 return ERR_PTR(err);
0ca743a5
PNA		 1986
1987 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
ff3cd7b3 1988 return ERR_PTR(-EINVAL);
0ca743a5 1989
ce355e20 1990 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
0ca743a5 1991 if (newstats == NULL)
ff3cd7b3 1992 return ERR_PTR(-ENOMEM);
0ca743a5
PNA		 1993
1994 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1995 * are not exposed to userspace.
1996 */
e8781f70 1997 preempt_disable();
0ca743a5
PNA		 1998 stats = this_cpu_ptr(newstats);
1999 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
2000 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
e8781f70 2001 preempt_enable();
0ca743a5 2002
ff3cd7b3
PNA		 2003 return newstats;
2004}
2005
53315ac6 2006static void nft_chain_stats_replace(struct nft_trans *trans)
ff3cd7b3 2007{
53315ac6 2008 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
0befd061 2009
53315ac6 2010 if (!nft_trans_chain_stats(trans))
b88825de
PNA		 2011 return;
2012
b685b534
PM		 2013 nft_trans_chain_stats(trans) =
2014 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
2015 lockdep_commit_lock_is_held(trans->ctx.net));
53315ac6
FW		 2016
2017 if (!nft_trans_chain_stats(trans))
bbb8c61f 2018 static_branch_inc(&nft_counters_enabled);
0ca743a5
PNA		 2019}
2020
0cbc06b3
FW		 2021static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
2022{
2c865a8a
PNA		 2023 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
2024 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
0cbc06b3
FW		 2025
2026 if (g0 != g1)
2027 kvfree(g1);
2028 kvfree(g0);
2029
2030 /* should be NULL either via abort or via successful commit */
2c865a8a
PNA		 2031 WARN_ON_ONCE(chain->blob_next);
2032 kvfree(chain->blob_next);
0cbc06b3
FW		 2033}
2034
d0e2c7de 2035void nf_tables_chain_destroy(struct nft_ctx *ctx)
91c7b38d 2036{
43a605f2 2037 struct nft_chain *chain = ctx->chain;
d54725cd 2038 struct nft_hook *hook, *next;
43a605f2 2039
fa5950e4
FW		 2040 if (WARN_ON(chain->use > 0))
2041 return;
91c7b38d 2042
0cbc06b3
FW		 2043 /* no concurrent access possible anymore */
2044 nf_tables_chain_free_chain_rules(chain);
2045
f323d954 2046 if (nft_is_base_chain(chain)) {
2cbce139
PNA		 2047 struct nft_base_chain *basechain = nft_base_chain(chain);
2048
d3519cb8 2049 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
d54725cd
PNA		 2050 list_for_each_entry_safe(hook, next,
2051 &basechain->hook_list, list) {
2052 list_del_rcu(&hook->list);
2053 kfree_rcu(hook, rcu);
2054 }
2055 }
2cbce139 2056 module_put(basechain->type->owner);
4c05ec47 2057 if (rcu_access_pointer(basechain->stats)) {
9f08ea84 2058 static_branch_dec(&nft_counters_enabled);
4c05ec47
TY		 2059 free_percpu(rcu_dereference_raw(basechain->stats));
2060 }
b7263e07 2061 kfree(chain->name);
002f2176 2062 kfree(chain->udata);
2cbce139 2063 kfree(basechain);
91c7b38d 2064 } else {
b7263e07 2065 kfree(chain->name);
002f2176 2066 kfree(chain->udata);
91c7b38d
PNA		 2067 kfree(chain);
2068 }
2069}
2070
3f0465a9
PNA		 2071static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
2072 const struct nlattr *attr)
2073{
2074 struct net_device *dev;
2075 char ifname[IFNAMSIZ];
2076 struct nft_hook *hook;
2077 int err;
2078
33758c89 2079 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
3f0465a9
PNA		 2080 if (!hook) {
2081 err = -ENOMEM;
2082 goto err_hook_alloc;
2083 }
2084
872f6903 2085 nla_strscpy(ifname, attr, IFNAMSIZ);
42f1c271
PNA		 2086 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
2087 * indirectly serializing all the other holders of the commit_mutex with
2088 * the rtnl_mutex.
2089 */
3f0465a9
PNA		 2090 dev = __dev_get_by_name(net, ifname);
2091 if (!dev) {
2092 err = -ENOENT;
2093 goto err_hook_dev;
2094 }
2095 hook->ops.dev = dev;
2096
2097 return hook;
2098
2099err_hook_dev:
2100 kfree(hook);
2101err_hook_alloc:
2102 return ERR_PTR(err);
2103}
2104
abadb2f8
PNA		 2105static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
2106 const struct nft_hook *this)
b75a3e83
PNA		 2107{
2108 struct nft_hook *hook;
2109
2110 list_for_each_entry(hook, hook_list, list) {
2111 if (this->ops.dev == hook->ops.dev)
abadb2f8 2112 return hook;
b75a3e83
PNA		 2113 }
2114
abadb2f8 2115 return NULL;
b75a3e83
PNA		 2116}
2117
3f0465a9
PNA		 2118static int nf_tables_parse_netdev_hooks(struct net *net,
2119 const struct nlattr *attr,
c3c060ad
PNA		 2120 struct list_head *hook_list,
2121 struct netlink_ext_ack *extack)
3f0465a9
PNA		 2122{
2123 struct nft_hook *hook, *next;
2124 const struct nlattr *tmp;
2125 int rem, n = 0, err;
2126
2127 nla_for_each_nested(tmp, attr, rem) {
2128 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
2129 err = -EINVAL;
2130 goto err_hook;
2131 }
2132
2133 hook = nft_netdev_hook_alloc(net, tmp);
2134 if (IS_ERR(hook)) {
c3c060ad 2135 NL_SET_BAD_ATTR(extack, tmp);
3f0465a9
PNA		 2136 err = PTR_ERR(hook);
2137 goto err_hook;
2138 }
b75a3e83 2139 if (nft_hook_list_find(hook_list, hook)) {
c3c060ad 2140 NL_SET_BAD_ATTR(extack, tmp);
cd77e75b 2141 kfree(hook);
b75a3e83
PNA		 2142 err = -EEXIST;
2143 goto err_hook;
2144 }
3f0465a9
PNA		 2145 list_add_tail(&hook->list, hook_list);
2146 n++;
2147
cb662ac6 2148 if (n == NFT_NETDEVICE_MAX) {
3f0465a9
PNA		 2149 err = -EFBIG;
2150 goto err_hook;
2151 }
2152 }
3f0465a9
PNA		 2153
2154 return 0;
2155
2156err_hook:
2157 list_for_each_entry_safe(hook, next, hook_list, list) {
2158 list_del(&hook->list);
2159 kfree(hook);
2160 }
2161 return err;
2162}
2163
508f8ccd
PNA		 2164struct nft_chain_hook {
2165 u32 num;
84ba7dd7 2166 s32 priority;
32537e91 2167 const struct nft_chain_type *type;
d54725cd 2168 struct list_head list;
508f8ccd
PNA		 2169};
2170
207296f1 2171static int nft_chain_parse_netdev(struct net *net, struct nlattr *tb[],
c3c060ad 2172 struct list_head *hook_list,
207296f1 2173 struct netlink_ext_ack *extack, u32 flags)
d54725cd
PNA		 2174{
2175 struct nft_hook *hook;
2176 int err;
2177
2178 if (tb[NFTA_HOOK_DEV]) {
2179 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
c3c060ad
PNA		 2180 if (IS_ERR(hook)) {
2181 NL_SET_BAD_ATTR(extack, tb[NFTA_HOOK_DEV]);
d54725cd 2182 return PTR_ERR(hook);
c3c060ad 2183 }
d54725cd
PNA		 2184
2185 list_add_tail(&hook->list, hook_list);
2186 } else if (tb[NFTA_HOOK_DEVS]) {
2187 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
c3c060ad 2188 hook_list, extack);
d54725cd
PNA		 2189 if (err < 0)
2190 return err;
05abe445 2191
d54725cd
PNA		 2192 }
2193
207296f1
PNA		 2194 if (flags & NFT_CHAIN_HW_OFFLOAD &&
2195 list_empty(hook_list))
2196 return -EINVAL;
2197
d54725cd
PNA		 2198 return 0;
2199}
2200
508f8ccd 2201static int nft_chain_parse_hook(struct net *net,
b9703ed4 2202 struct nft_base_chain *basechain,
508f8ccd 2203 const struct nlattr * const nla[],
36596dad 2204 struct nft_chain_hook *hook, u8 family,
207296f1 2205 u32 flags, struct netlink_ext_ack *extack)
508f8ccd 2206{
d59d2f82 2207 struct nftables_pernet *nft_net = nft_pernet(net);
508f8ccd 2208 struct nlattr *ha[NFTA_HOOK_MAX + 1];
32537e91 2209 const struct nft_chain_type *type;
508f8ccd
PNA		 2210 int err;
2211
0854db2a 2212 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b
FW		 2213 lockdep_nfnl_nft_mutex_not_held();
2214
8cb08174
JB		 2215 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2216 nla[NFTA_CHAIN_HOOK],
2217 nft_hook_policy, NULL);
508f8ccd
PNA		 2218 if (err < 0)
2219 return err;
2220
b9703ed4
PNA		 2221 if (!basechain) {
2222 if (!ha[NFTA_HOOK_HOOKNUM] ||
8509f62b
PNA		 2223 !ha[NFTA_HOOK_PRIORITY]) {
2224 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2225 return -ENOENT;
2226 }
508f8ccd 2227
b9703ed4
PNA		 2228 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2229 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
508f8ccd 2230
b9703ed4
PNA		 2231 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2232 if (!type)
2233 return -EOPNOTSUPP;
82603549 2234
b9703ed4
PNA		 2235 if (nla[NFTA_CHAIN_TYPE]) {
2236 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
2237 family, true);
2238 if (IS_ERR(type)) {
2239 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2240 return PTR_ERR(type);
2241 }
983c4fcb 2242 }
b9703ed4
PNA		 2243 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
2244 return -EOPNOTSUPP;
84ba7dd7 2245
b9703ed4
PNA		 2246 if (type->type == NFT_CHAIN_T_NAT &&
2247 hook->priority <= NF_IP_PRI_CONNTRACK)
2248 return -EOPNOTSUPP;
2249 } else {
2250 if (ha[NFTA_HOOK_HOOKNUM]) {
2251 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2252 if (hook->num != basechain->ops.hooknum)
2253 return -EOPNOTSUPP;
2254 }
2255 if (ha[NFTA_HOOK_PRIORITY]) {
2256 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2257 if (hook->priority != basechain->ops.priority)
2258 return -EOPNOTSUPP;
2259 }
2260
2261 type = basechain->type;
2262 }
84ba7dd7 2263
983c4fcb
PNA		 2264 if (!try_module_get(type->owner)) {
2265 if (nla[NFTA_CHAIN_TYPE])
2266 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
508f8ccd 2267 return -ENOENT;
983c4fcb 2268 }
508f8ccd
PNA		 2269
2270 hook->type = type;
2271
d54725cd 2272 INIT_LIST_HEAD(&hook->list);
d3519cb8 2273 if (nft_base_chain_netdev(family, hook->num)) {
207296f1 2274 err = nft_chain_parse_netdev(net, ha, &hook->list, extack, flags);
d54725cd 2275 if (err < 0) {
508f8ccd 2276 module_put(type->owner);
d54725cd 2277 return err;
508f8ccd 2278 }
d54725cd 2279 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
508f8ccd
PNA		 2280 module_put(type->owner);
2281 return -EOPNOTSUPP;
2282 }
2283
2284 return 0;
2285}
2286
2287static void nft_chain_release_hook(struct nft_chain_hook *hook)
2288{
d54725cd
PNA		 2289 struct nft_hook *h, *next;
2290
2291 list_for_each_entry_safe(h, next, &hook->list, list) {
2292 list_del(&h->list);
2293 kfree(h);
2294 }
508f8ccd 2295 module_put(hook->type->owner);
508f8ccd
PNA		 2296}
2297
e38fbfa9 2298static void nft_last_rule(const struct nft_chain *chain, const void *ptr)
0cbc06b3 2299{
e38fbfa9
FW		 2300 struct nft_rule_dp_last *lrule;
2301
2302 BUILD_BUG_ON(offsetof(struct nft_rule_dp_last, end) != 0);
2c865a8a 2303
e38fbfa9
FW		 2304 lrule = (struct nft_rule_dp_last *)ptr;
2305 lrule->end.is_last = 1;
2306 lrule->chain = chain;
2c865a8a
PNA		 2307 /* blob size does not include the trailer rule */
2308}
2309
e38fbfa9
FW		 2310static struct nft_rule_blob *nf_tables_chain_alloc_rules(const struct nft_chain *chain,
2311 unsigned int size)
2c865a8a
PNA		 2312{
2313 struct nft_rule_blob *blob;
2314
2c865a8a 2315 if (size > INT_MAX)
0cbc06b3
FW		 2316 return NULL;
2317
e38fbfa9
FW		 2318 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rule_dp_last);
2319
33758c89 2320 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2c865a8a 2321 if (!blob)
0cbc06b3
FW		 2322 return NULL;
2323
2c865a8a 2324 blob->size = 0;
e38fbfa9 2325 nft_last_rule(chain, blob->data);
0cbc06b3 2326
2c865a8a 2327 return blob;
0cbc06b3
FW		 2328}
2329
d54725cd
PNA		 2330static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2331 const struct nft_chain_hook *hook,
2332 struct nft_chain *chain)
2333{
c5c6accd
FW		 2334 ops->pf = family;
2335 ops->hooknum = hook->num;
2336 ops->priority = hook->priority;
2337 ops->priv = chain;
2338 ops->hook = hook->type->hooks[ops->hooknum];
2339 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
d54725cd
PNA		 2340}
2341
2342static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2343 struct nft_chain_hook *hook, u32 flags)
2344{
2345 struct nft_chain *chain;
2346 struct nft_hook *h;
2347
2348 basechain->type = hook->type;
2349 INIT_LIST_HEAD(&basechain->hook_list);
2350 chain = &basechain->chain;
2351
d3519cb8 2352 if (nft_base_chain_netdev(family, hook->num)) {
d54725cd
PNA		 2353 list_splice_init(&hook->list, &basechain->hook_list);
2354 list_for_each_entry(h, &basechain->hook_list, list)
2355 nft_basechain_hook_init(&h->ops, family, hook, chain);
d54725cd 2356 }
b9703ed4 2357 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
d54725cd 2358
67c49de4 2359 chain->flags |= NFT_CHAIN_BASE | flags;
d54725cd
PNA		 2360 basechain->policy = NF_ACCEPT;
2361 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
77972a36
PNA		 2362 !nft_chain_offload_support(basechain)) {
2363 list_splice_init(&basechain->hook_list, &hook->list);
d54725cd 2364 return -EOPNOTSUPP;
77972a36 2365 }
d54725cd
PNA		 2366
2367 flow_block_init(&basechain->flow_block);
2368
2369 return 0;
2370}
2371
4bedf9ee 2372int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
04b7db41
PNA		 2373{
2374 int err;
2375
2376 err = rhltable_insert_key(&table->chains_ht, chain->name,
2377 &chain->rhlhead, nft_chain_ht_params);
2378 if (err)
2379 return err;
2380
2381 list_add_tail_rcu(&chain->list, &table->chains);
2382
2383 return 0;
2384}
2385
d0e2c7de
PNA		 2386static u64 chain_id;
2387
4035285f 2388static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
983c4fcb
PNA		 2389 u8 policy, u32 flags,
2390 struct netlink_ext_ack *extack)
4035285f
PNA		 2391{
2392 const struct nlattr * const *nla = ctx->nla;
2393 struct nft_table *table = ctx->table;
4035285f 2394 struct nft_base_chain *basechain;
4035285f 2395 struct net *net = ctx->net;
d0e2c7de 2396 char name[NFT_NAME_MAXLEN];
2c865a8a 2397 struct nft_rule_blob *blob;
66293c46 2398 struct nft_trans *trans;
4035285f 2399 struct nft_chain *chain;
4035285f
PNA		 2400 int err;
2401
4035285f 2402 if (nla[NFTA_CHAIN_HOOK]) {
921ebde3 2403 struct nft_stats __percpu *stats = NULL;
b9703ed4 2404 struct nft_chain_hook hook = {};
4035285f 2405
d0e2c7de
PNA		 2406 if (flags & NFT_CHAIN_BINDING)
2407 return -EOPNOTSUPP;
2408
207296f1 2409 err = nft_chain_parse_hook(net, NULL, nla, &hook, family, flags,
b9703ed4 2410 extack);
4035285f
PNA		 2411 if (err < 0)
2412 return err;
2413
33758c89 2414 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2415 if (basechain == NULL) {
2416 nft_chain_release_hook(&hook);
2417 return -ENOMEM;
2418 }
d54725cd 2419 chain = &basechain->chain;
4035285f
PNA		 2420
2421 if (nla[NFTA_CHAIN_COUNTERS]) {
2422 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2423 if (IS_ERR(stats)) {
2424 nft_chain_release_hook(&hook);
2425 kfree(basechain);
2426 return PTR_ERR(stats);
2427 }
4c05ec47 2428 rcu_assign_pointer(basechain->stats, stats);
4035285f
PNA		 2429 }
2430
d54725cd
PNA		 2431 err = nft_basechain_init(basechain, family, &hook, flags);
2432 if (err < 0) {
2433 nft_chain_release_hook(&hook);
2434 kfree(basechain);
9a4d6dd5 2435 free_percpu(stats);
d54725cd
PNA		 2436 return err;
2437 }
921ebde3
TH		 2438 if (stats)
2439 static_branch_inc(&nft_counters_enabled);
4035285f 2440 } else {
d0e2c7de
PNA		 2441 if (flags & NFT_CHAIN_BASE)
2442 return -EINVAL;
2443 if (flags & NFT_CHAIN_HW_OFFLOAD)
2444 return -EOPNOTSUPP;
2445
33758c89 2446 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2447 if (chain == NULL)
2448 return -ENOMEM;
d0e2c7de
PNA		 2449
2450 chain->flags = flags;
4035285f 2451 }
43a605f2
PNA		 2452 ctx->chain = chain;
2453
4035285f
PNA		 2454 INIT_LIST_HEAD(&chain->rules);
2455 chain->handle = nf_tables_alloc_handle(table);
2456 chain->table = table;
d0e2c7de
PNA		 2457
2458 if (nla[NFTA_CHAIN_NAME]) {
33758c89 2459 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
d0e2c7de 2460 } else {
59136aa3
FW		 2461 if (!(flags & NFT_CHAIN_BINDING)) {
2462 err = -EINVAL;
002f2176 2463 goto err_destroy_chain;
59136aa3 2464 }
d0e2c7de
PNA		 2465
2466 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
33758c89 2467 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
d0e2c7de
PNA		 2468 }
2469
4035285f
PNA		 2470 if (!chain->name) {
2471 err = -ENOMEM;
002f2176
JGG		 2472 goto err_destroy_chain;
2473 }
2474
2475 if (nla[NFTA_CHAIN_USERDATA]) {
33758c89 2476 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
002f2176
JGG		 2477 if (chain->udata == NULL) {
2478 err = -ENOMEM;
2479 goto err_destroy_chain;
2480 }
2481 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
4035285f
PNA		 2482 }
2483
e38fbfa9 2484 blob = nf_tables_chain_alloc_rules(chain, 0);
2c865a8a 2485 if (!blob) {
0cbc06b3 2486 err = -ENOMEM;
002f2176 2487 goto err_destroy_chain;
0cbc06b3
FW		 2488 }
2489
2c865a8a
PNA		 2490 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2491 RCU_INIT_POINTER(chain->blob_gen_1, blob);
0cbc06b3 2492
c974a3a3 2493 err = nf_tables_register_hook(net, table, chain);
4035285f 2494 if (err < 0)
002f2176 2495 goto err_destroy_chain;
4035285f 2496
1689f259
PNA		 2497 if (!nft_use_inc(&table->use)) {
2498 err = -EMFILE;
2499 goto err_use;
2500 }
2501
66293c46
FW		 2502 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2503 if (IS_ERR(trans)) {
2504 err = PTR_ERR(trans);
002f2176 2505 goto err_unregister_hook;
1b2470e5 2506 }
4035285f 2507
ad652f38 2508 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
66293c46
FW		 2509 if (nft_is_base_chain(chain))
2510 nft_trans_chain_policy(trans) = policy;
2511
04b7db41
PNA		 2512 err = nft_chain_add(table, chain);
2513 if (err < 0) {
2514 nft_trans_destroy(trans);
002f2176 2515 goto err_unregister_hook;
04b7db41
PNA		 2516 }
2517
4035285f 2518 return 0;
1689f259 2519
002f2176 2520err_unregister_hook:
1689f259
PNA		 2521 nft_use_dec_restore(&table->use);
2522err_use:
c974a3a3 2523 nf_tables_unregister_hook(net, table, chain);
002f2176 2524err_destroy_chain:
43a605f2 2525 nf_tables_chain_destroy(ctx);
4035285f
PNA		 2526
2527 return err;
2528}
2529
c9626a2c 2530static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
98a381a7
PNA		 2531 u32 flags, const struct nlattr *attr,
2532 struct netlink_ext_ack *extack)
2c4a488a
PNA		 2533{
2534 const struct nlattr * const *nla = ctx->nla;
b9703ed4 2535 struct nft_base_chain *basechain = NULL;
2c4a488a
PNA		 2536 struct nft_table *table = ctx->table;
2537 struct nft_chain *chain = ctx->chain;
b9703ed4 2538 struct nft_chain_hook hook = {};
2c4a488a 2539 struct nft_stats *stats = NULL;
b9703ed4 2540 struct nft_hook *h, *next;
2c4a488a
PNA		 2541 struct nf_hook_ops *ops;
2542 struct nft_trans *trans;
b9703ed4 2543 bool unregister = false;
c974a3a3 2544 int err;
2c4a488a 2545
c9626a2c
PNA		 2546 if (chain->flags ^ flags)
2547 return -EOPNOTSUPP;
2548
b9703ed4
PNA		 2549 INIT_LIST_HEAD(&hook.list);
2550
2c4a488a 2551 if (nla[NFTA_CHAIN_HOOK]) {
98a381a7
PNA		 2552 if (!nft_is_base_chain(chain)) {
2553 NL_SET_BAD_ATTR(extack, attr);
77a92189 2554 return -EEXIST;
98a381a7 2555 }
b9703ed4
PNA		 2556
2557 basechain = nft_base_chain(chain);
2558 err = nft_chain_parse_hook(ctx->net, basechain, nla, &hook,
207296f1 2559 ctx->family, flags, extack);
2c4a488a
PNA		 2560 if (err < 0)
2561 return err;
2562
2c4a488a
PNA		 2563 if (basechain->type != hook.type) {
2564 nft_chain_release_hook(&hook);
98a381a7 2565 NL_SET_BAD_ATTR(extack, attr);
77a92189 2566 return -EEXIST;
2c4a488a
PNA		 2567 }
2568
b9703ed4
PNA		 2569 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2570 list_for_each_entry_safe(h, next, &hook.list, list) {
2571 h->ops.pf = basechain->ops.pf;
2572 h->ops.hooknum = basechain->ops.hooknum;
2573 h->ops.priority = basechain->ops.priority;
2574 h->ops.priv = basechain->ops.priv;
2575 h->ops.hook = basechain->ops.hook;
2576
2577 if (nft_hook_list_find(&basechain->hook_list, h)) {
2578 list_del(&h->list);
2579 kfree(h);
2580 }
d54725cd
PNA		 2581 }
2582 } else {
2583 ops = &basechain->ops;
2584 if (ops->hooknum != hook.num ||
2585 ops->priority != hook.priority) {
2586 nft_chain_release_hook(&hook);
98a381a7 2587 NL_SET_BAD_ATTR(extack, attr);
77a92189 2588 return -EEXIST;
d54725cd 2589 }
2c4a488a 2590 }
2c4a488a
PNA		 2591 }
2592
2593 if (nla[NFTA_CHAIN_HANDLE] &&
2594 nla[NFTA_CHAIN_NAME]) {
2595 struct nft_chain *chain2;
2596
f102d66b
FW		 2597 chain2 = nft_chain_lookup(ctx->net, table,
2598 nla[NFTA_CHAIN_NAME], genmask);
98a381a7
PNA		 2599 if (!IS_ERR(chain2)) {
2600 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
b9703ed4
PNA		 2601 err = -EEXIST;
2602 goto err_hooks;
98a381a7 2603 }
2c4a488a
PNA		 2604 }
2605
2606 if (nla[NFTA_CHAIN_COUNTERS]) {
b9703ed4
PNA		 2607 if (!nft_is_base_chain(chain)) {
2608 err = -EOPNOTSUPP;
2609 goto err_hooks;
2610 }
2c4a488a
PNA		 2611
2612 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
b9703ed4
PNA		 2613 if (IS_ERR(stats)) {
2614 err = PTR_ERR(stats);
2615 goto err_hooks;
2616 }
2c4a488a
PNA		 2617 }
2618
b9703ed4
PNA		 2619 if (!(table->flags & NFT_TABLE_F_DORMANT) &&
2620 nft_is_base_chain(chain) &&
2621 !list_empty(&hook.list)) {
2622 basechain = nft_base_chain(chain);
2623 ops = &basechain->ops;
2624
2625 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {
2626 err = nft_netdev_register_hooks(ctx->net, &hook.list);
2627 if (err < 0)
2628 goto err_hooks;
2629 }
2630 }
2631
2632 unregister = true;
c6cc94df 2633 err = -ENOMEM;
2c4a488a
PNA		 2634 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2635 sizeof(struct nft_trans_chain));
c6cc94df 2636 if (trans == NULL)
b9703ed4 2637 goto err_trans;
2c4a488a
PNA		 2638
2639 nft_trans_chain_stats(trans) = stats;
2640 nft_trans_chain_update(trans) = true;
2641
2642 if (nla[NFTA_CHAIN_POLICY])
2643 nft_trans_chain_policy(trans) = policy;
2644 else
2645 nft_trans_chain_policy(trans) = -1;
2646
c6cc94df
FW		 2647 if (nla[NFTA_CHAIN_HANDLE] &&
2648 nla[NFTA_CHAIN_NAME]) {
d59d2f82 2649 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c6cc94df
FW		 2650 struct nft_trans *tmp;
2651 char *name;
2652
2653 err = -ENOMEM;
33758c89 2654 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
c6cc94df 2655 if (!name)
b9703ed4 2656 goto err_trans;
c6cc94df
FW		 2657
2658 err = -EEXIST;
0854db2a 2659 list_for_each_entry(tmp, &nft_net->commit_list, list) {
c6cc94df
FW		 2660 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2661 tmp->ctx.table == table &&
2662 nft_trans_chain_update(tmp) &&
2663 nft_trans_chain_name(tmp) &&
2664 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
98a381a7 2665 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
c6cc94df 2666 kfree(name);
b9703ed4 2667 goto err_trans;
c6cc94df 2668 }
2c4a488a 2669 }
c6cc94df
FW		 2670
2671 nft_trans_chain_name(trans) = name;
2c4a488a 2672 }
b9703ed4
PNA		 2673
2674 nft_trans_basechain(trans) = basechain;
2675 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2676 list_splice(&hook.list, &nft_trans_chain_hooks(trans));
043d2acf
PNA		 2677 if (nla[NFTA_CHAIN_HOOK])
2678 module_put(hook.type->owner);
b9703ed4 2679
0854db2a 2680 nft_trans_commit_list_add_tail(ctx->net, trans);
2c4a488a
PNA		 2681
2682 return 0;
b9703ed4
PNA		 2683
2684err_trans:
c6cc94df
FW		 2685 free_percpu(stats);
2686 kfree(trans);
b9703ed4
PNA		 2687err_hooks:
2688 if (nla[NFTA_CHAIN_HOOK]) {
2689 list_for_each_entry_safe(h, next, &hook.list, list) {
2690 if (unregister)
2691 nf_unregister_net_hook(ctx->net, &h->ops);
2692 list_del(&h->list);
2693 kfree_rcu(h, rcu);
2694 }
2695 module_put(hook.type->owner);
2696 }
2697
c6cc94df 2698 return err;
2c4a488a
PNA		 2699}
2700
837830a4 2701static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
95f466d2 2702 const struct nft_table *table,
515ad530 2703 const struct nlattr *nla, u8 genmask)
837830a4 2704{
d59d2f82 2705 struct nftables_pernet *nft_net = nft_pernet(net);
837830a4
PNA		 2706 u32 id = ntohl(nla_get_be32(nla));
2707 struct nft_trans *trans;
2708
0854db2a 2709 list_for_each_entry(trans, &nft_net->commit_list, list) {
837830a4
PNA		 2710 struct nft_chain *chain = trans->ctx.chain;
2711
2712 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
95f466d2 2713 chain->table == table &&
515ad530
TLSC		 2714 id == nft_trans_chain_id(trans) &&
2715 nft_active_genmask(chain, genmask))
837830a4
PNA		 2716 return chain;
2717 }
2718 return ERR_PTR(-ENOENT);
2719}
2720
7dab8ee3
PNA		 2721static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2722 const struct nlattr * const nla[])
96518518 2723{
7dab8ee3 2724 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 2725 struct netlink_ext_ack *extack = info->extack;
2726 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2727 u8 family = info->nfmsg->nfgen_family;
74cccc3d 2728 struct nft_chain *chain = NULL;
7dab8ee3 2729 struct net *net = info->net;
36dd1bcc 2730 const struct nlattr *attr;
96518518 2731 struct nft_table *table;
57de2a0c 2732 u8 policy = NF_ACCEPT;
4035285f 2733 struct nft_ctx ctx;
96518518 2734 u64 handle = 0;
c9626a2c 2735 u32 flags = 0;
96518518 2736
0854db2a 2737 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 2738
6001a930
PNA		 2739 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2740 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2741 if (IS_ERR(table)) {
2742 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2743 return PTR_ERR(table);
36dd1bcc 2744 }
96518518 2745
96518518 2746 chain = NULL;
36dd1bcc 2747 attr = nla[NFTA_CHAIN_NAME];
96518518
PM		 2748
2749 if (nla[NFTA_CHAIN_HANDLE]) {
2750 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
cac20fcd 2751 chain = nft_chain_lookup_byhandle(table, handle, genmask);
36dd1bcc
PNA		 2752 if (IS_ERR(chain)) {
2753 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
96518518 2754 return PTR_ERR(chain);
36dd1bcc
PNA		 2755 }
2756 attr = nla[NFTA_CHAIN_HANDLE];
74cccc3d 2757 } else if (nla[NFTA_CHAIN_NAME]) {
f102d66b 2758 chain = nft_chain_lookup(net, table, attr, genmask);
96518518 2759 if (IS_ERR(chain)) {
36dd1bcc
PNA		 2760 if (PTR_ERR(chain) != -ENOENT) {
2761 NL_SET_BAD_ATTR(extack, attr);
96518518 2762 return PTR_ERR(chain);
36dd1bcc 2763 }
96518518
PM		 2764 chain = NULL;
2765 }
74cccc3d
PNA		 2766 } else if (!nla[NFTA_CHAIN_ID]) {
2767 return -EINVAL;
96518518
PM		 2768 }
2769
57de2a0c 2770 if (nla[NFTA_CHAIN_POLICY]) {
f323d954 2771 if (chain != NULL &&
36dd1bcc
PNA		 2772 !nft_is_base_chain(chain)) {
2773 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
d6b6cb1d 2774 return -EOPNOTSUPP;
36dd1bcc 2775 }
d6b6cb1d
PNA		 2776
2777 if (chain == NULL &&
36dd1bcc
PNA		 2778 nla[NFTA_CHAIN_HOOK] == NULL) {
2779 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
57de2a0c 2780 return -EOPNOTSUPP;
36dd1bcc 2781 }
57de2a0c 2782
8f46df18 2783 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
57de2a0c
PM		 2784 switch (policy) {
2785 case NF_DROP:
2786 case NF_ACCEPT:
2787 break;
2788 default:
2789 return -EINVAL;
2790 }
2791 }
2792
c9626a2c
PNA		 2793 if (nla[NFTA_CHAIN_FLAGS])
2794 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
b717273d
FW		 2795 else if (chain)
2796 flags = chain->flags;
c9626a2c 2797
c1f79a2e
PNA		 2798 if (flags & ~NFT_CHAIN_FLAGS)
2799 return -EOPNOTSUPP;
2800
7dab8ee3 2801 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4035285f 2802
96518518 2803 if (chain != NULL) {
5dc52d83
PNA		 2804 if (chain->flags & NFT_CHAIN_BINDING)
2805 return -EINVAL;
2806
7dab8ee3 2807 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 2808 NL_SET_BAD_ATTR(extack, attr);
96518518 2809 return -EEXIST;
36dd1bcc 2810 }
7dab8ee3 2811 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 2812 return -EOPNOTSUPP;
2813
67c49de4 2814 flags |= chain->flags & NFT_CHAIN_BASE;
98a381a7
PNA		 2815 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2816 extack);
96518518
PM		 2817 }
2818
983c4fcb 2819 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
96518518
PM		 2820}
2821
42e344f0
PS		 2822static int nft_delchain_hook(struct nft_ctx *ctx,
2823 struct nft_base_chain *basechain,
7d937b10
PNA		 2824 struct netlink_ext_ack *extack)
2825{
42e344f0 2826 const struct nft_chain *chain = &basechain->chain;
7d937b10
PNA		 2827 const struct nlattr * const *nla = ctx->nla;
2828 struct nft_chain_hook chain_hook = {};
7d937b10
PNA		 2829 struct nft_hook *this, *hook;
2830 LIST_HEAD(chain_del_list);
2831 struct nft_trans *trans;
2832 int err;
2833
7d937b10 2834 err = nft_chain_parse_hook(ctx->net, basechain, nla, &chain_hook,
207296f1 2835 ctx->family, chain->flags, extack);
7d937b10
PNA		 2836 if (err < 0)
2837 return err;
2838
2839 list_for_each_entry(this, &chain_hook.list, list) {
2840 hook = nft_hook_list_find(&basechain->hook_list, this);
2841 if (!hook) {
2842 err = -ENOENT;
2843 goto err_chain_del_hook;
2844 }
2845 list_move(&hook->list, &chain_del_list);
2846 }
2847
2848 trans = nft_trans_alloc(ctx, NFT_MSG_DELCHAIN,
2849 sizeof(struct nft_trans_chain));
2850 if (!trans) {
2851 err = -ENOMEM;
2852 goto err_chain_del_hook;
2853 }
2854
2855 nft_trans_basechain(trans) = basechain;
2856 nft_trans_chain_update(trans) = true;
2857 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2858 list_splice(&chain_del_list, &nft_trans_chain_hooks(trans));
2859 nft_chain_release_hook(&chain_hook);
2860
2861 nft_trans_commit_list_add_tail(ctx->net, trans);
2862
2863 return 0;
2864
2865err_chain_del_hook:
2866 list_splice(&chain_del_list, &basechain->hook_list);
2867 nft_chain_release_hook(&chain_hook);
2868
2869 return err;
2870}
2871
7dab8ee3
PNA		 2872static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2873 const struct nlattr * const nla[])
96518518 2874{
7dab8ee3
PNA		 2875 struct netlink_ext_ack *extack = info->extack;
2876 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2877 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 2878 struct net *net = info->net;
36dd1bcc 2879 const struct nlattr *attr;
96518518
PM		 2880 struct nft_table *table;
2881 struct nft_chain *chain;
9dee1474 2882 struct nft_rule *rule;
91c7b38d 2883 struct nft_ctx ctx;
3ecbfd65 2884 u64 handle;
9dee1474
PNA		 2885 u32 use;
2886 int err;
96518518 2887
6001a930
PNA		 2888 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2889 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2890 if (IS_ERR(table)) {
2891 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2892 return PTR_ERR(table);
36dd1bcc 2893 }
96518518 2894
3ecbfd65 2895 if (nla[NFTA_CHAIN_HANDLE]) {
36dd1bcc
PNA		 2896 attr = nla[NFTA_CHAIN_HANDLE];
2897 handle = be64_to_cpu(nla_get_be64(attr));
cac20fcd 2898 chain = nft_chain_lookup_byhandle(table, handle, genmask);
3ecbfd65 2899 } else {
36dd1bcc 2900 attr = nla[NFTA_CHAIN_NAME];
f102d66b 2901 chain = nft_chain_lookup(net, table, attr, genmask);
3ecbfd65 2902 }
36dd1bcc 2903 if (IS_ERR(chain)) {
f80a612d
FFM		 2904 if (PTR_ERR(chain) == -ENOENT &&
2905 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
2906 return 0;
2907
36dd1bcc 2908 NL_SET_BAD_ATTR(extack, attr);
96518518 2909 return PTR_ERR(chain);
36dd1bcc 2910 }
9dee1474 2911
7d937b10
PNA		 2912 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2913
2914 if (nla[NFTA_CHAIN_HOOK]) {
2915 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2916 return -EOPNOTSUPP;
2917
42e344f0
PS		 2918 if (nft_is_base_chain(chain)) {
2919 struct nft_base_chain *basechain = nft_base_chain(chain);
2920
2921 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
2922 return nft_delchain_hook(&ctx, basechain, extack);
2923 }
7d937b10
PNA		 2924 }
2925
7dab8ee3 2926 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
9dee1474 2927 chain->use > 0)
96518518
PM		 2928 return -EBUSY;
2929
9dee1474
PNA		 2930 use = chain->use;
2931 list_for_each_entry(rule, &chain->rules, list) {
2932 if (!nft_is_active_next(net, rule))
2933 continue;
2934 use--;
2935
2936 err = nft_delrule(&ctx, rule);
2937 if (err < 0)
2938 return err;
2939 }
2940
2941 /* There are rules and elements that are still holding references to us,
2942 * we cannot do a recursive removal in this case.
2943 */
36dd1bcc
PNA		 2944 if (use > 0) {
2945 NL_SET_BAD_ATTR(extack, attr);
9dee1474 2946 return -EBUSY;
36dd1bcc 2947 }
9dee1474 2948
ee01d542 2949 return nft_delchain(&ctx);
96518518
PM		 2950}
2951
96518518
PM		 2952/*
2953 * Expressions
2954 */
2955
2956/**
ef1f7df9 2957 * nft_register_expr - register nf_tables expr type
3db86c39 2958 * @type: expr type
96518518 2959 *
ef1f7df9 2960 * Registers the expr type for use with nf_tables. Returns zero on
96518518
PM		 2961 * success or a negative errno code otherwise.
2962 */
ef1f7df9 2963int nft_register_expr(struct nft_expr_type *type)
96518518
PM		 2964{
2965 nfnl_lock(NFNL_SUBSYS_NFTABLES);
758dbcec 2966 if (type->family == NFPROTO_UNSPEC)
e688a7f8 2967 list_add_tail_rcu(&type->list, &nf_tables_expressions);
758dbcec 2968 else
e688a7f8 2969 list_add_rcu(&type->list, &nf_tables_expressions);
96518518
PM		 2970 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2971 return 0;
2972}
2973EXPORT_SYMBOL_GPL(nft_register_expr);
2974
2975/**
ef1f7df9 2976 * nft_unregister_expr - unregister nf_tables expr type
3db86c39 2977 * @type: expr type
96518518 2978 *
ef1f7df9 2979 * Unregisters the expr typefor use with nf_tables.
96518518 2980 */
ef1f7df9 2981void nft_unregister_expr(struct nft_expr_type *type)
96518518
PM		 2982{
2983 nfnl_lock(NFNL_SUBSYS_NFTABLES);
e688a7f8 2984 list_del_rcu(&type->list);
96518518
PM		 2985 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2986}
2987EXPORT_SYMBOL_GPL(nft_unregister_expr);
2988
64d46806
PM		 2989static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2990 struct nlattr *nla)
96518518 2991{
9cff126f 2992 const struct nft_expr_type *type, *candidate = NULL;
96518518 2993
ef1f7df9 2994 list_for_each_entry(type, &nf_tables_expressions, list) {
9cff126f
PNA		 2995 if (!nla_strcmp(nla, type->name)) {
2996 if (!type->family && !candidate)
2997 candidate = type;
2998 else if (type->family == family)
2999 candidate = type;
3000 }
96518518 3001 }
9cff126f 3002 return candidate;
96518518
PM		 3003}
3004
b9c04ae7
PNA		 3005#ifdef CONFIG_MODULES
3006static int nft_expr_type_request_module(struct net *net, u8 family,
3007 struct nlattr *nla)
3008{
eb014de4
PNA		 3009 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
3010 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
b9c04ae7
PNA		 3011 return -EAGAIN;
3012
3013 return 0;
3014}
3015#endif
3016
452238e8
FW		 3017static const struct nft_expr_type *nft_expr_type_get(struct net *net,
3018 u8 family,
64d46806 3019 struct nlattr *nla)
96518518 3020{
ef1f7df9 3021 const struct nft_expr_type *type;
96518518
PM		 3022
3023 if (nla == NULL)
3024 return ERR_PTR(-EINVAL);
3025
64d46806 3026 type = __nft_expr_type_get(family, nla);
ef1f7df9
PM		 3027 if (type != NULL && try_module_get(type->owner))
3028 return type;
96518518 3029
f102d66b 3030 lockdep_nfnl_nft_mutex_not_held();
96518518 3031#ifdef CONFIG_MODULES
ef1f7df9 3032 if (type == NULL) {
b9c04ae7 3033 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
64d46806
PM		 3034 return ERR_PTR(-EAGAIN);
3035
eb014de4
PNA		 3036 if (nft_request_module(net, "nft-expr-%.*s",
3037 nla_len(nla),
3038 (char *)nla_data(nla)) == -EAGAIN)
96518518
PM		 3039 return ERR_PTR(-EAGAIN);
3040 }
3041#endif
3042 return ERR_PTR(-ENOENT);
3043}
3044
3045static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
9332d27d
FW		 3046 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
3047 .len = NFT_MODULE_AUTOLOAD_LIMIT },
96518518
PM		 3048 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
3049};
3050
3051static int nf_tables_fill_expr_info(struct sk_buff *skb,
8daa8fde 3052 const struct nft_expr *expr, bool reset)
96518518 3053{
ef1f7df9 3054 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
96518518
PM		 3055 goto nla_put_failure;
3056
3057 if (expr->ops->dump) {
ae0be8de
MK		 3058 struct nlattr *data = nla_nest_start_noflag(skb,
3059 NFTA_EXPR_DATA);
96518518
PM		 3060 if (data == NULL)
3061 goto nla_put_failure;
8daa8fde 3062 if (expr->ops->dump(skb, expr, reset) < 0)
96518518
PM		 3063 goto nla_put_failure;
3064 nla_nest_end(skb, data);
3065 }
3066
3067 return skb->len;
3068
3069nla_put_failure:
3070 return -1;
3071};
3072
0b2d8a7b 3073int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
8daa8fde 3074 const struct nft_expr *expr, bool reset)
0b2d8a7b
PM		 3075{
3076 struct nlattr *nest;
3077
ae0be8de 3078 nest = nla_nest_start_noflag(skb, attr);
0b2d8a7b
PM		 3079 if (!nest)
3080 goto nla_put_failure;
8daa8fde 3081 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
0b2d8a7b
PM		 3082 goto nla_put_failure;
3083 nla_nest_end(skb, nest);
3084 return 0;
3085
3086nla_put_failure:
3087 return -1;
3088}
3089
96518518
PM		 3090struct nft_expr_info {
3091 const struct nft_expr_ops *ops;
83d9dcba 3092 const struct nlattr *attr;
ef1f7df9 3093 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
96518518
PM		 3094};
3095
0ca743a5
PNA		 3096static int nf_tables_expr_parse(const struct nft_ctx *ctx,
3097 const struct nlattr *nla,
96518518
PM		 3098 struct nft_expr_info *info)
3099{
ef1f7df9 3100 const struct nft_expr_type *type;
96518518 3101 const struct nft_expr_ops *ops;
ef1f7df9 3102 struct nlattr *tb[NFTA_EXPR_MAX + 1];
96518518
PM		 3103 int err;
3104
8cb08174
JB		 3105 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3106 nft_expr_policy, NULL);
96518518
PM		 3107 if (err < 0)
3108 return err;
3109
452238e8 3110 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
ef1f7df9
PM		 3111 if (IS_ERR(type))
3112 return PTR_ERR(type);
3113
3114 if (tb[NFTA_EXPR_DATA]) {
8cb08174
JB		 3115 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3116 tb[NFTA_EXPR_DATA],
3117 type->policy, NULL);
ef1f7df9
PM		 3118 if (err < 0)
3119 goto err1;
3120 } else
3121 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
3122
3123 if (type->select_ops != NULL) {
0ca743a5
PNA		 3124 ops = type->select_ops(ctx,
3125 (const struct nlattr * const *)info->tb);
ef1f7df9
PM		 3126 if (IS_ERR(ops)) {
3127 err = PTR_ERR(ops);
0ef1efd1
PNA		 3128#ifdef CONFIG_MODULES
3129 if (err == -EAGAIN)
eb014de4
PNA		 3130 if (nft_expr_type_request_module(ctx->net,
3131 ctx->family,
3132 tb[NFTA_EXPR_NAME]) != -EAGAIN)
3133 err = -ENOENT;
0ef1efd1 3134#endif
ef1f7df9
PM		 3135 goto err1;
3136 }
3137 } else
3138 ops = type->ops;
3139
83d9dcba 3140 info->attr = nla;
96518518 3141 info->ops = ops;
83d9dcba 3142
96518518 3143 return 0;
ef1f7df9
PM		 3144
3145err1:
3146 module_put(type->owner);
3147 return err;
96518518
PM		 3148}
3149
3a07327d
PNA		 3150int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
3151 struct nft_expr_info *info)
3152{
3153 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3154 const struct nft_expr_type *type;
3155 int err;
3156
3157 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3158 nft_expr_policy, NULL);
3159 if (err < 0)
3160 return err;
3161
3162 if (!tb[NFTA_EXPR_DATA])
3163 return -EINVAL;
3164
3165 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
98cbc40e
DC		 3166 if (!type)
3167 return -ENOENT;
3a07327d
PNA		 3168
3169 if (!type->inner_ops)
3170 return -EOPNOTSUPP;
3171
3172 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3173 tb[NFTA_EXPR_DATA],
3174 type->policy, NULL);
3175 if (err < 0)
3176 goto err_nla_parse;
3177
3178 info->attr = nla;
3179 info->ops = type->inner_ops;
3180
3181 return 0;
3182
3183err_nla_parse:
3184 return err;
3185}
3186
96518518 3187static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 3188 const struct nft_expr_info *expr_info,
96518518
PM		 3189 struct nft_expr *expr)
3190{
7dab8ee3 3191 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 3192 int err;
3193
3194 expr->ops = ops;
3195 if (ops->init) {
7dab8ee3 3196 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 3197 if (err < 0)
3198 goto err1;
3199 }
3200
96518518 3201 return 0;
96518518
PM		 3202err1:
3203 expr->ops = NULL;
3204 return err;
3205}
3206
62472bce
PM		 3207static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
3208 struct nft_expr *expr)
96518518 3209{
3f3a390d
PNA		 3210 const struct nft_expr_type *type = expr->ops->type;
3211
96518518 3212 if (expr->ops->destroy)
62472bce 3213 expr->ops->destroy(ctx, expr);
3f3a390d 3214 module_put(type->owner);
96518518
PM		 3215}
3216
795a6d6b
PNA		 3217static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
3218 const struct nlattr *nla)
0b2d8a7b 3219{
7dab8ee3 3220 struct nft_expr_info expr_info;
0b2d8a7b 3221 struct nft_expr *expr;
b8e20400 3222 struct module *owner;
0b2d8a7b
PM		 3223 int err;
3224
7dab8ee3 3225 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 3226 if (err < 0)
52077804
PNA		 3227 goto err_expr_parse;
3228
3229 err = -EOPNOTSUPP;
3230 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
3231 goto err_expr_stateful;
0b2d8a7b
PM		 3232
3233 err = -ENOMEM;
33758c89 3234 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 3235 if (expr == NULL)
52077804 3236 goto err_expr_stateful;
0b2d8a7b 3237
7dab8ee3 3238 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 3239 if (err < 0)
52077804 3240 goto err_expr_new;
0b2d8a7b
PM		 3241
3242 return expr;
52077804 3243err_expr_new:
6cafaf47 3244 kfree(expr);
52077804 3245err_expr_stateful:
7dab8ee3
PNA		 3246 owner = expr_info.ops->type->owner;
3247 if (expr_info.ops->type->release_ops)
3248 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 3249
3250 module_put(owner);
52077804 3251err_expr_parse:
0b2d8a7b
PM		 3252 return ERR_PTR(err);
3253}
3254
c604cc69
PNA		 3255int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
3256{
3257 int err;
3258
3259 if (src->ops->clone) {
3260 dst->ops = src->ops;
3261 err = src->ops->clone(dst, src);
3262 if (err < 0)
3263 return err;
3264 } else {
3265 memcpy(dst, src, src->ops->size);
3266 }
3267
3268 __module_get(src->ops->type->owner);
3269
3270 return 0;
3271}
3272
0b2d8a7b
PM		 3273void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
3274{
3275 nf_tables_expr_destroy(ctx, expr);
3276 kfree(expr);
3277}
3278
96518518
PM		 3279/*
3280 * Rules
3281 */
3282
cac20fcd
PNA		 3283static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
3284 u64 handle)
96518518
PM		 3285{
3286 struct nft_rule *rule;
3287
3288 // FIXME: this sucks
d9adf22a 3289 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 3290 if (handle == rule->handle)
3291 return rule;
3292 }
3293
3294 return ERR_PTR(-ENOENT);
3295}
3296
cac20fcd
PNA		 3297static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3298 const struct nlattr *nla)
96518518
PM		 3299{
3300 if (nla == NULL)
3301 return ERR_PTR(-EINVAL);
3302
cac20fcd 3303 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 3304}
3305
3306static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 3307 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3308 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 3309 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3310 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3311 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
3312 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
0ca743a5 3313 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 3314 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 3315 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3316 .len = NFT_USERDATA_MAXLEN },
467697d2 3317 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 3318 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 3319 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 3320};
3321
84d7fce6
PNA		 3322static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3323 u32 portid, u32 seq, int event,
3324 u32 flags, int family,
96518518
PM		 3325 const struct nft_table *table,
3326 const struct nft_chain *chain,
8daa8fde
PS		 3327 const struct nft_rule *rule, u64 handle,
3328 bool reset)
96518518
PM		 3329{
3330 struct nlmsghdr *nlh;
96518518
PM		 3331 const struct nft_expr *expr, *next;
3332 struct nlattr *list;
dedb67c4 3333 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3334
19c28b13
PNA		 3335 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3336 nft_base_seq(net));
3337 if (!nlh)
96518518
PM		 3338 goto nla_put_failure;
3339
96518518
PM		 3340 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3341 goto nla_put_failure;
3342 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3343 goto nla_put_failure;
b46f6ded
ND		 3344 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3345 NFTA_RULE_PAD))
96518518
PM		 3346 goto nla_put_failure;
3347
e189ae16
PNA		 3348 if (event != NFT_MSG_DELRULE && handle) {
3349 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3350 NFTA_RULE_PAD))
5e948466
EL		 3351 goto nla_put_failure;
3352 }
3353
b72920f6
PNA		 3354 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3355 nft_flow_rule_stats(chain, rule);
3356
ae0be8de 3357 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3358 if (list == NULL)
3359 goto nla_put_failure;
3360 nft_rule_for_each_expr(expr, next, rule) {
8daa8fde 3361 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
96518518 3362 goto nla_put_failure;
96518518
PM		 3363 }
3364 nla_nest_end(skb, list);
3365
86f1ec32
PM		 3366 if (rule->udata) {
3367 struct nft_userdata *udata = nft_userdata(rule);
3368 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3369 udata->data) < 0)
3370 goto nla_put_failure;
3371 }
0768b3b3 3372
053c095a
JB		 3373 nlmsg_end(skb, nlh);
3374 return 0;
96518518
PM		 3375
3376nla_put_failure:
3377 nlmsg_trim(skb, nlh);
3378 return -1;
3379}
3380
25e94a99
PNA		 3381static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3382 const struct nft_rule *rule, int event)
96518518 3383{
d59d2f82 3384 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3385 const struct nft_rule *prule;
96518518 3386 struct sk_buff *skb;
e189ae16
PNA		 3387 u64 handle = 0;
3388 u16 flags = 0;
96518518
PM		 3389 int err;
3390
128ad332
PNA		 3391 if (!ctx->report &&
3392 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3393 return;
96518518 3394
96518518
PM		 3395 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3396 if (skb == NULL)
3397 goto err;
3398
e189ae16
PNA		 3399 if (event == NFT_MSG_NEWRULE &&
3400 !list_is_first(&rule->list, &ctx->chain->rules) &&
3401 !list_is_last(&rule->list, &ctx->chain->rules)) {
3402 prule = list_prev_entry(rule, list);
3403 handle = prule->handle;
3404 }
3405 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3406 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3407 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3408 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3409
84d7fce6 3410 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16 3411 event, flags, ctx->family, ctx->table,
8daa8fde 3412 ctx->chain, rule, handle, false);
96518518
PM		 3413 if (err < 0) {
3414 kfree_skb(skb);
3415 goto err;
3416 }
3417
0854db2a 3418 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3419 return;
96518518 3420err:
25e94a99 3421 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3422}
3423
6e1f760e 3424struct nft_rule_dump_ctx {
e46abbcc 3425 char *table;
b7263e07 3426 char *chain;
6e1f760e
PNA		 3427};
3428
241faece
PS		 3429static int __nf_tables_dump_rules(struct sk_buff *skb,
3430 unsigned int *idx,
3431 struct netlink_callback *cb,
3432 const struct nft_table *table,
8daa8fde
PS		 3433 const struct nft_chain *chain,
3434 bool reset)
241faece
PS		 3435{
3436 struct net *net = sock_net(skb->sk);
2c82c7e7 3437 const struct nft_rule *rule, *prule;
241faece 3438 unsigned int s_idx = cb->args[0];
e189ae16 3439 u64 handle;
241faece 3440
2c82c7e7 3441 prule = NULL;
241faece
PS		 3442 list_for_each_entry_rcu(rule, &chain->rules, list) {
3443 if (!nft_is_active(net, rule))
2c82c7e7 3444 goto cont_skip;
241faece
PS		 3445 if (*idx < s_idx)
3446 goto cont;
3447 if (*idx > s_idx) {
3448 memset(&cb->args[1], 0,
3449 sizeof(cb->args) - sizeof(cb->args[0]));
3450 }
e189ae16
PNA		 3451 if (prule)
3452 handle = prule->handle;
3453 else
3454 handle = 0;
3455
241faece
PS		 3456 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3457 cb->nlh->nlmsg_seq,
3458 NFT_MSG_NEWRULE,
3459 NLM_F_MULTI | NLM_F_APPEND,
3460 table->family,
8daa8fde 3461 table, chain, rule, handle, reset) < 0)
310529e6 3462 return 1;
241faece
PS		 3463
3464 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3465cont:
2c82c7e7
FW		 3466 prule = rule;
3467cont_skip:
241faece
PS		 3468 (*idx)++;
3469 }
310529e6 3470 return 0;
241faece
PS		 3471}
3472
96518518
PM		 3473static int nf_tables_dump_rules(struct sk_buff *skb,
3474 struct netlink_callback *cb)
3475{
3476 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6e1f760e 3477 const struct nft_rule_dump_ctx *ctx = cb->data;
241faece 3478 struct nft_table *table;
96518518 3479 const struct nft_chain *chain;
241faece 3480 unsigned int idx = 0;
99633ab2 3481 struct net *net = sock_net(skb->sk);
96518518 3482 int family = nfmsg->nfgen_family;
0854db2a 3483 struct nftables_pernet *nft_net;
8daa8fde
PS		 3484 bool reset = false;
3485
3486 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3487 reset = true;
96518518 3488
e688a7f8 3489 rcu_read_lock();
d59d2f82 3490 nft_net = nft_pernet(net);
34002783 3491 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3492
0854db2a 3493 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3494 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3495 continue;
3496
3497 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3498 continue;
3499
715849ab 3500 if (ctx && ctx->table && ctx->chain) {
241faece 3501 struct rhlist_head *list, *tmp;
6e1f760e 3502
241faece
PS		 3503 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3504 nft_chain_ht_params);
3505 if (!list)
3506 goto done;
3507
3508 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3509 if (!nft_is_active(net, chain))
3510 continue;
3511 __nf_tables_dump_rules(skb, &idx,
8daa8fde 3512 cb, table, chain, reset);
241faece 3513 break;
96518518 3514 }
241faece 3515 goto done;
96518518 3516 }
241faece
PS		 3517
3518 list_for_each_entry_rcu(chain, &table->chains, list) {
8daa8fde
PS		 3519 if (__nf_tables_dump_rules(skb, &idx,
3520 cb, table, chain, reset))
241faece
PS		 3521 goto done;
3522 }
3523
3524 if (ctx && ctx->table)
3525 break;
96518518
PM		 3526 }
3527done:
e688a7f8 3528 rcu_read_unlock();
310529e6
PS		 3529
3530 cb->args[0] = idx;
96518518
PM		 3531 return skb->len;
3532}
3533
90fd131a
FW		 3534static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3535{
3536 const struct nlattr * const *nla = cb->data;
3537 struct nft_rule_dump_ctx *ctx = NULL;
3538
3539 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3540 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3541 if (!ctx)
3542 return -ENOMEM;
3543
3544 if (nla[NFTA_RULE_TABLE]) {
3545 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3546 GFP_ATOMIC);
3547 if (!ctx->table) {
3548 kfree(ctx);
3549 return -ENOMEM;
3550 }
3551 }
3552 if (nla[NFTA_RULE_CHAIN]) {
3553 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3554 GFP_ATOMIC);
3555 if (!ctx->chain) {
3556 kfree(ctx->table);
3557 kfree(ctx);
3558 return -ENOMEM;
3559 }
3560 }
3561 }
3562
3563 cb->data = ctx;
3564 return 0;
3565}
3566
6e1f760e
PNA		 3567static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3568{
e46abbcc
PS		 3569 struct nft_rule_dump_ctx *ctx = cb->data;
3570
3571 if (ctx) {
3572 kfree(ctx->table);
b7263e07 3573 kfree(ctx->chain);
e46abbcc
PS		 3574 kfree(ctx);
3575 }
6e1f760e
PNA		 3576 return 0;
3577}
3578
d9adf22a 3579/* called with rcu_read_lock held */
797d4980
PNA		 3580static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3581 const struct nlattr * const nla[])
96518518 3582{
797d4980
PNA		 3583 struct netlink_ext_ack *extack = info->extack;
3584 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3585 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3586 const struct nft_chain *chain;
3587 const struct nft_rule *rule;
797d4980 3588 struct net *net = info->net;
1b2470e5 3589 struct nft_table *table;
96518518 3590 struct sk_buff *skb2;
8daa8fde 3591 bool reset = false;
96518518
PM		 3592 int err;
3593
797d4980 3594 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518 3595 struct netlink_dump_control c = {
90fd131a 3596 .start= nf_tables_dump_rules_start,
96518518 3597 .dump = nf_tables_dump_rules,
6e1f760e 3598 .done = nf_tables_dump_rules_done,
d9adf22a 3599 .module = THIS_MODULE,
90fd131a 3600 .data = (void *)nla,
96518518 3601 };
6e1f760e 3602
797d4980 3603 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 3604 }
3605
6001a930 3606 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3607 if (IS_ERR(table)) {
3608 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3609 return PTR_ERR(table);
36dd1bcc 3610 }
96518518 3611
f102d66b 3612 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3613 if (IS_ERR(chain)) {
3614 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
96518518 3615 return PTR_ERR(chain);
36dd1bcc 3616 }
96518518 3617
cac20fcd 3618 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3619 if (IS_ERR(rule)) {
3620 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3621 return PTR_ERR(rule);
36dd1bcc 3622 }
96518518 3623
d9adf22a 3624 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 3625 if (!skb2)
3626 return -ENOMEM;
3627
8daa8fde
PS		 3628 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3629 reset = true;
3630
84d7fce6 3631 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 3632 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
8daa8fde 3633 family, table, chain, rule, 0, reset);
96518518 3634 if (err < 0)
ee921183 3635 goto err_fill_rule_info;
96518518 3636
ee921183 3637 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 3638
ee921183 3639err_fill_rule_info:
96518518
PM		 3640 kfree_skb(skb2);
3641 return err;
3642}
3643
4bedf9ee 3644void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule)
96518518 3645{
29e38801 3646 struct nft_expr *expr, *next;
96518518
PM		 3647
3648 /*
3649 * Careful: some expressions might not be initialized in case this
3650 * is called on error from nf_tables_newrule().
3651 */
3652 expr = nft_expr_first(rule);
31cc578a 3653 while (nft_expr_more(rule, expr)) {
29e38801 3654 next = nft_expr_next(expr);
62472bce 3655 nf_tables_expr_destroy(ctx, expr);
29e38801 3656 expr = next;
96518518
PM		 3657 }
3658 kfree(rule);
3659}
3660
4bedf9ee 3661static void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3662{
f6ac8585 3663 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3664 nf_tables_rule_destroy(ctx, rule);
3665}
3666
a654de8f
PNA		 3667int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3668{
3669 struct nft_expr *expr, *last;
3670 const struct nft_data *data;
3671 struct nft_rule *rule;
3672 int err;
3673
26b2f552
TY		 3674 if (ctx->level == NFT_JUMP_STACK_SIZE)
3675 return -EMLINK;
3676
a654de8f
PNA		 3677 list_for_each_entry(rule, &chain->rules, list) {
3678 if (!nft_is_active_next(ctx->net, rule))
3679 continue;
3680
3681 nft_rule_for_each_expr(expr, last, rule) {
3682 if (!expr->ops->validate)
3683 continue;
3684
3685 err = expr->ops->validate(ctx, expr, &data);
3686 if (err < 0)
3687 return err;
3688 }
3689 }
3690
3691 return 0;
3692}
3693EXPORT_SYMBOL_GPL(nft_chain_validate);
3694
3695static int nft_table_validate(struct net *net, const struct nft_table *table)
3696{
3697 struct nft_chain *chain;
3698 struct nft_ctx ctx = {
3699 .net = net,
3700 .family = table->family,
3701 };
3702 int err;
3703
3704 list_for_each_entry(chain, &table->chains, list) {
3705 if (!nft_is_base_chain(chain))
3706 continue;
3707
3708 ctx.chain = chain;
3709 err = nft_chain_validate(&ctx, chain);
3710 if (err < 0)
3711 return err;
314c8284
FW		 3712
3713 cond_resched();
a654de8f
PNA		 3714 }
3715
3716 return 0;
3717}
3718
d46fc894
PNA		 3719int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
3720 const struct nft_set_iter *iter,
3721 struct nft_set_elem *elem)
3722{
3723 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
3724 struct nft_ctx *pctx = (struct nft_ctx *)ctx;
3725 const struct nft_data *data;
3726 int err;
3727
3728 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
3729 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
3730 return 0;
3731
3732 data = nft_set_ext_data(ext);
3733 switch (data->verdict.code) {
3734 case NFT_JUMP:
3735 case NFT_GOTO:
3736 pctx->level++;
3737 err = nft_chain_validate(ctx, data->verdict.chain);
3738 if (err < 0)
3739 return err;
3740 pctx->level--;
3741 break;
3742 default:
3743 break;
3744 }
3745
3746 return 0;
3747}
3748
d46fc894
PNA		 3749int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
3750{
3751 u8 genmask = nft_genmask_next(ctx->net);
3752 struct nft_set_elem_catchall *catchall;
3753 struct nft_set_elem elem;
3754 struct nft_set_ext *ext;
3755 int ret = 0;
3756
3757 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
3758 ext = nft_set_elem_ext(set, catchall->elem);
3759 if (!nft_set_elem_active(ext, genmask))
3760 continue;
3761
3762 elem.priv = catchall->elem;
3763 ret = nft_setelem_validate(ctx, set, NULL, &elem);
3764 if (ret < 0)
3765 return ret;
3766 }
3767
3768 return ret;
3769}
3770
75dd48e2 3771static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3772 const struct nft_chain *chain,
75dd48e2
PS		 3773 const struct nlattr *nla);
3774
1081d11b
PNA		 3775#define NFT_RULE_MAXEXPRS 128
3776
7dab8ee3
PNA		 3777static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3778 const struct nlattr * const nla[])
96518518 3779{
7dab8ee3 3780 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3781 struct netlink_ext_ack *extack = info->extack;
3782 unsigned int size, i, n, ulen = 0, usize = 0;
3783 u8 genmask = nft_genmask_next(info->net);
3784 struct nft_rule *rule, *old_rule = NULL;
3785 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3786 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3787 struct nft_flow_rule *flow = NULL;
7dab8ee3 3788 struct net *net = info->net;
7dab8ee3 3789 struct nft_userdata *udata;
96518518
PM		 3790 struct nft_table *table;
3791 struct nft_chain *chain;
7dab8ee3
PNA		 3792 struct nft_trans *trans;
3793 u64 handle, pos_handle;
96518518
PM		 3794 struct nft_expr *expr;
3795 struct nft_ctx ctx;
3796 struct nlattr *tmp;
96518518 3797 int err, rem;
96518518 3798
0854db2a 3799 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3800
6001a930
PNA		 3801 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3802 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3803 if (IS_ERR(table)) {
3804 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3805 return PTR_ERR(table);
36dd1bcc 3806 }
96518518 3807
837830a4
PNA		 3808 if (nla[NFTA_RULE_CHAIN]) {
3809 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3810 genmask);
3811 if (IS_ERR(chain)) {
3812 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3813 return PTR_ERR(chain);
3814 }
d0e2c7de 3815
837830a4 3816 } else if (nla[NFTA_RULE_CHAIN_ID]) {
515ad530
TLSC		 3817 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID],
3818 genmask);
837830a4
PNA		 3819 if (IS_ERR(chain)) {
3820 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3821 return PTR_ERR(chain);
3822 }
3823 } else {
3824 return -EINVAL;
36dd1bcc 3825 }
96518518 3826
0ebc1064
PNA		 3827 if (nft_chain_is_bound(chain))
3828 return -EOPNOTSUPP;
3829
96518518
PM		 3830 if (nla[NFTA_RULE_HANDLE]) {
3831 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3832 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3833 if (IS_ERR(rule)) {
3834 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3835 return PTR_ERR(rule);
36dd1bcc 3836 }
96518518 3837
7dab8ee3 3838 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3839 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3840 return -EEXIST;
36dd1bcc 3841 }
7dab8ee3 3842 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3843 old_rule = rule;
3844 else
3845 return -EOPNOTSUPP;
3846 } else {
7dab8ee3
PNA		 3847 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3848 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3849 return -EINVAL;
3850 handle = nf_tables_alloc_handle(table);
a0a7379e 3851
447750f2
FW		 3852 if (nla[NFTA_RULE_POSITION]) {
3853 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3854 old_rule = __nft_rule_lookup(chain, pos_handle);
3855 if (IS_ERR(old_rule)) {
3856 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3857 return PTR_ERR(old_rule);
3858 }
75dd48e2 3859 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3860 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3861 if (IS_ERR(old_rule)) {
3862 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3863 return PTR_ERR(old_rule);
3864 }
36dd1bcc 3865 }
5e948466
EL		 3866 }
3867
7dab8ee3 3868 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3869
96518518
PM		 3870 n = 0;
3871 size = 0;
3872 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3873 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3874 sizeof(struct nft_expr_info),
3875 GFP_KERNEL);
3876 if (!expr_info)
2a43ecf9
FW		 3877 return -ENOMEM;
3878
96518518
PM		 3879 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3880 err = -EINVAL;
3881 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3882 goto err_release_expr;
96518518 3883 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3884 goto err_release_expr;
7dab8ee3 3885 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3886 if (err < 0) {
3887 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3888 goto err_release_expr;
c781471d 3889 }
7dab8ee3 3890 size += expr_info[n].ops->size;
96518518
PM		 3891 n++;
3892 }
3893 }
9889840f
PM		 3894 /* Check for overflow of dlen field */
3895 err = -EFBIG;
3896 if (size >= 1 << 12)
3c5e4462 3897 goto err_release_expr;
96518518 3898
86f1ec32 3899 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3900 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3901 if (ulen > 0)
3902 usize = sizeof(struct nft_userdata) + ulen;
3903 }
0768b3b3 3904
96518518 3905 err = -ENOMEM;
33758c89 3906 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3907 if (rule == NULL)
3c5e4462 3908 goto err_release_expr;
96518518 3909
889f7ee7 3910 nft_activate_next(net, rule);
0628b123 3911
96518518
PM		 3912 rule->handle = handle;
3913 rule->dlen = size;
86f1ec32 3914 rule->udata = ulen ? 1 : 0;
0768b3b3 3915
86f1ec32
PM		 3916 if (ulen) {
3917 udata = nft_userdata(rule);
3918 udata->len = ulen - 1;
3919 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3920 }
96518518 3921
96518518
PM		 3922 expr = nft_expr_first(rule);
3923 for (i = 0; i < n; i++) {
7dab8ee3 3924 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 3925 if (err < 0) {
7dab8ee3 3926 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 3927 goto err_release_rule;
83d9dcba 3928 }
a654de8f 3929
7dab8ee3 3930 if (expr_info[i].ops->validate)
00c320f9 3931 nft_validate_state_update(table, NFT_VALIDATE_NEED);
a654de8f 3932
7dab8ee3 3933 expr_info[i].ops = NULL;
96518518
PM		 3934 expr = nft_expr_next(expr);
3935 }
3936
3c5e4462
PNA		 3937 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3938 flow = nft_flow_rule_create(net, rule);
3939 if (IS_ERR(flow)) {
3940 err = PTR_ERR(flow);
3941 goto err_release_rule;
3942 }
3943 }
3944
1689f259
PNA		 3945 if (!nft_use_inc(&chain->use)) {
3946 err = -EMFILE;
3947 goto err_release_rule;
3948 }
3949
7dab8ee3 3950 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
2c964c55
PNA		 3951 err = nft_delrule(&ctx, old_rule);
3952 if (err < 0)
3953 goto err_destroy_flow_rule;
3954
ca089878 3955 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 3956 if (trans == NULL) {
3957 err = -ENOMEM;
3c5e4462 3958 goto err_destroy_flow_rule;
569ccae6 3959 }
569ccae6
FW		 3960 list_add_tail_rcu(&rule->list, &old_rule->list);
3961 } else {
c9626a2c
PNA		 3962 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3963 if (!trans) {
569ccae6 3964 err = -ENOMEM;
3c5e4462 3965 goto err_destroy_flow_rule;
569ccae6
FW		 3966 }
3967
7dab8ee3 3968 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 3969 if (old_rule)
3970 list_add_rcu(&rule->list, &old_rule->list);
3971 else
3972 list_add_tail_rcu(&rule->list, &chain->rules);
3973 } else {
3974 if (old_rule)
3975 list_add_tail_rcu(&rule->list, &old_rule->list);
3976 else
3977 list_add_rcu(&rule->list, &chain->rules);
3978 }
0628b123 3979 }
7dab8ee3 3980 kvfree(expr_info);
96518518 3981
3c5e4462
PNA		 3982 if (flow)
3983 nft_trans_flow_rule(trans) = flow;
3984
00c320f9 3985 if (table->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 3986 return nft_table_validate(net, table);
3987
3988 return 0;
3c5e4462
PNA		 3989
3990err_destroy_flow_rule:
1689f259 3991 nft_use_dec_restore(&chain->use);
4ca041f9
CIK		 3992 if (flow)
3993 nft_flow_rule_destroy(flow);
3c5e4462 3994err_release_rule:
26b5a571 3995 nft_rule_expr_deactivate(&ctx, rule, NFT_TRANS_PREPARE_ERROR);
1240eb93 3996 nf_tables_rule_destroy(&ctx, rule);
3c5e4462 3997err_release_expr:
96518518 3998 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 3999 if (expr_info[i].ops) {
4000 module_put(expr_info[i].ops->type->owner);
4001 if (expr_info[i].ops->type->release_ops)
4002 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 4003 }
96518518 4004 }
7dab8ee3
PNA		 4005 kvfree(expr_info);
4006
96518518
PM		 4007 return err;
4008}
4009
1a94e38d 4010static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 4011 const struct nft_chain *chain,
1a94e38d
PNA		 4012 const struct nlattr *nla)
4013{
d59d2f82 4014 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 4015 u32 id = ntohl(nla_get_be32(nla));
4016 struct nft_trans *trans;
4017
0854db2a 4018 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d 4019 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 4020 trans->ctx.chain == chain &&
1a94e38d 4021 id == nft_trans_rule_id(trans))
e3c361b8 4022 return nft_trans_rule(trans);
1a94e38d
PNA		 4023 }
4024 return ERR_PTR(-ENOENT);
4025}
4026
7dab8ee3
PNA		 4027static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
4028 const struct nlattr * const nla[])
96518518 4029{
7dab8ee3 4030 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 4031 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4032 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 4033 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 4034 struct net *net = info->net;
4035 struct nft_table *table;
cf9dc09d 4036 struct nft_rule *rule;
0628b123 4037 struct nft_ctx ctx;
ef4b65e5 4038 int err = 0;
96518518 4039
6001a930
PNA		 4040 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
4041 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4042 if (IS_ERR(table)) {
4043 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 4044 return PTR_ERR(table);
36dd1bcc 4045 }
96518518 4046
cf9dc09d 4047 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 4048 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
4049 genmask);
36dd1bcc 4050 if (IS_ERR(chain)) {
1fb7696a 4051 if (PTR_ERR(chain) == -ENOENT &&
f80a612d
FFM		 4052 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4053 return 0;
4054
36dd1bcc 4055 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 4056 return PTR_ERR(chain);
36dd1bcc 4057 }
d0e2c7de
PNA		 4058 if (nft_chain_is_bound(chain))
4059 return -EOPNOTSUPP;
cf9dc09d 4060 }
96518518 4061
7dab8ee3 4062 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 4063
cf9dc09d
PNA		 4064 if (chain) {
4065 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 4066 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc 4067 if (IS_ERR(rule)) {
f80a612d
FFM		 4068 if (PTR_ERR(rule) == -ENOENT &&
4069 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4070 return 0;
4071
36dd1bcc 4072 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 4073 return PTR_ERR(rule);
36dd1bcc 4074 }
96518518 4075
1a94e38d
PNA		 4076 err = nft_delrule(&ctx, rule);
4077 } else if (nla[NFTA_RULE_ID]) {
36d5b291 4078 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 4079 if (IS_ERR(rule)) {
4080 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 4081 return PTR_ERR(rule);
36dd1bcc 4082 }
1a94e38d 4083
5e266fe7 4084 err = nft_delrule(&ctx, rule);
cf9dc09d 4085 } else {
ce24b721 4086 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 4087 }
4088 } else {
4089 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 4090 if (!nft_is_active_next(net, chain))
4091 continue;
6eaf41e8
PNA		 4092 if (nft_chain_is_bound(chain))
4093 continue;
664b0f8c 4094
cf9dc09d 4095 ctx.chain = chain;
ce24b721 4096 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 4097 if (err < 0)
4098 break;
4099 }
4100 }
4101
4102 return err;
4103}
4104
20a69341
PM		 4105/*
4106 * Sets
4107 */
e32a4dc6
FW		 4108static const struct nft_set_type *nft_set_types[] = {
4109 &nft_set_hash_fast_type,
4110 &nft_set_hash_type,
4111 &nft_set_rhash_type,
4112 &nft_set_bitmap_type,
4113 &nft_set_rbtree_type,
e6abef61 4114#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 4115 &nft_set_pipapo_avx2_type,
4116#endif
e32a4dc6
FW		 4117 &nft_set_pipapo_type,
4118};
20a69341 4119
2b664957 4120#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 4121 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
4122 NFT_SET_EVAL)
2b664957 4123
71cc0873 4124static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 4125{
71cc0873 4126 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 4127}
4128
c50b960c
PM		 4129/*
4130 * Select a set implementation based on the data characteristics and the
4131 * given policy. The total memory use might not be known if no size is
4132 * given, in that case the amount of memory per element is used.
4133 */
4134static const struct nft_set_ops *
2b664957
PNA		 4135nft_select_set_ops(const struct nft_ctx *ctx,
4136 const struct nlattr * const nla[],
bed4a63e 4137 const struct nft_set_desc *desc)
20a69341 4138{
d59d2f82 4139 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 4140 const struct nft_set_ops *ops, *bops;
4141 struct nft_set_estimate est, best;
2b664957
PNA		 4142 const struct nft_set_type *type;
4143 u32 flags = 0;
e32a4dc6 4144 int i;
20a69341 4145
0854db2a 4146 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 4147 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 4148
2b664957
PNA		 4149 if (nla[NFTA_SET_FLAGS] != NULL)
4150 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 4151
55af753c
PNA		 4152 bops = NULL;
4153 best.size = ~0;
4154 best.lookup = ~0;
0b5a7874 4155 best.space = ~0;
c50b960c 4156
e32a4dc6
FW		 4157 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
4158 type = nft_set_types[i];
71cc0873 4159 ops = &type->ops;
2b664957 4160
71cc0873 4161 if (!nft_set_ops_candidate(type, flags))
20a69341 4162 continue;
2b664957 4163 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 4164 continue;
4165
bed4a63e 4166 switch (desc->policy) {
c50b960c 4167 case NFT_SET_POL_PERFORMANCE:
55af753c 4168 if (est.lookup < best.lookup)
c50b960c 4169 break;
644e334e
PNA		 4170 if (est.lookup == best.lookup &&
4171 est.space < best.space)
4172 break;
c50b960c
PM		 4173 continue;
4174 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 4175 if (!desc->size) {
4176 if (est.space < best.space)
4177 break;
4178 if (est.space == best.space &&
4179 est.lookup < best.lookup)
4180 break;
4f2921ca 4181 } else if (est.size < best.size || !bops) {
c50b960c 4182 break;
0b5a7874 4183 }
c50b960c
PM		 4184 continue;
4185 default:
4186 break;
4187 }
4188
c50b960c
PM		 4189 bops = ops;
4190 best = est;
20a69341
PM		 4191 }
4192
c50b960c
PM		 4193 if (bops != NULL)
4194 return bops;
4195
20a69341
PM		 4196 return ERR_PTR(-EOPNOTSUPP);
4197}
4198
4199static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 4200 [NFTA_SET_TABLE] = { .type = NLA_STRING,
4201 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 4202 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 4203 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 4204 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
4205 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
4206 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
4207 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
4208 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 4209 [NFTA_SET_POLICY] = { .type = NLA_U32 },
4210 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 4211 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 4212 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
4213 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 4214 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
4215 .len = NFT_USERDATA_MAXLEN },
8aeff920 4216 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 4217 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 4218 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
48b0ae04 4219 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
c50b960c
PM		 4220};
4221
4222static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
4223 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
f3a2181e 4224 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
20a69341
PM		 4225};
4226
cac20fcd
PNA		 4227static struct nft_set *nft_set_lookup(const struct nft_table *table,
4228 const struct nlattr *nla, u8 genmask)
20a69341
PM		 4229{
4230 struct nft_set *set;
4231
4232 if (nla == NULL)
4233 return ERR_PTR(-EINVAL);
4234
d9adf22a 4235 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 4236 if (!nla_strcmp(nla, set->name) &&
4237 nft_active_genmask(set, genmask))
20a69341
PM		 4238 return set;
4239 }
4240 return ERR_PTR(-ENOENT);
4241}
4242
cac20fcd
PNA		 4243static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
4244 const struct nlattr *nla,
4245 u8 genmask)
3ecbfd65
HS		 4246{
4247 struct nft_set *set;
4248
3ecbfd65
HS		 4249 list_for_each_entry(set, &table->sets, list) {
4250 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
4251 nft_active_genmask(set, genmask))
4252 return set;
4253 }
4254 return ERR_PTR(-ENOENT);
4255}
4256
cac20fcd 4257static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 4258 const struct nft_table *table,
cac20fcd 4259 const struct nlattr *nla, u8 genmask)
958bee14 4260{
d59d2f82 4261 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 4262 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 4263 struct nft_trans *trans;
958bee14 4264
0854db2a 4265 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 4266 if (trans->msg_type == NFT_MSG_NEWSET) {
4267 struct nft_set *set = nft_trans_set(trans);
37a9cc52 4268
9c7f96fd 4269 if (id == nft_trans_set_id(trans) &&
470ee20e 4270 set->table == table &&
9c7f96fd
AK		 4271 nft_active_genmask(set, genmask))
4272 return set;
4273 }
958bee14
PNA		 4274 }
4275 return ERR_PTR(-ENOENT);
4276}
c7a72e3f 4277
10659cba
PNA		 4278struct nft_set *nft_set_lookup_global(const struct net *net,
4279 const struct nft_table *table,
4280 const struct nlattr *nla_set_name,
4281 const struct nlattr *nla_set_id,
4282 u8 genmask)
c7a72e3f
PNA		 4283{
4284 struct nft_set *set;
4285
cac20fcd 4286 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 4287 if (IS_ERR(set)) {
4288 if (!nla_set_id)
4289 return set;
4290
470ee20e 4291 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 4292 }
4293 return set;
4294}
10659cba 4295EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 4296
20a69341
PM		 4297static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
4298 const char *name)
4299{
4300 const struct nft_set *i;
4301 const char *p;
4302 unsigned long *inuse;
60eb1894 4303 unsigned int n = 0, min = 0;
20a69341 4304
38745490 4305 p = strchr(name, '%');
20a69341
PM		 4306 if (p != NULL) {
4307 if (p[1] != 'd' || strchr(p + 2, '%'))
4308 return -EINVAL;
4309
4310 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
4311 if (inuse == NULL)
4312 return -ENOMEM;
60eb1894 4313cont:
20a69341 4314 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 4315 int tmp;
4316
271c5ca8 4317 if (!nft_is_active_next(ctx->net, i))
37a9cc52 4318 continue;
14662917 4319 if (!sscanf(i->name, name, &tmp))
20a69341 4320 continue;
60eb1894 4321 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 4322 continue;
14662917 4323
60eb1894 4324 set_bit(tmp - min, inuse);
20a69341
PM		 4325 }
4326
53b70287 4327 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 4328 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
4329 min += BITS_PER_BYTE * PAGE_SIZE;
4330 memset(inuse, 0, PAGE_SIZE);
4331 goto cont;
4332 }
20a69341
PM		 4333 free_page((unsigned long)inuse);
4334 }
4335
33758c89 4336 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 4337 if (!set->name)
4338 return -ENOMEM;
4339
20a69341 4340 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 4341 if (!nft_is_active_next(ctx->net, i))
4342 continue;
e63aaaa6
AY		 4343 if (!strcmp(set->name, i->name)) {
4344 kfree(set->name);
7fb6f78d 4345 set->name = NULL;
20a69341 4346 return -ENFILE;
e63aaaa6 4347 }
20a69341
PM		 4348 }
4349 return 0;
4350}
4351
917d80d3 4352int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 4353{
4354 u64 ms = be64_to_cpu(nla_get_be64(nla));
4355 u64 max = (u64)(~((u64)0));
4356
4357 max = div_u64(max, NSEC_PER_MSEC);
4358 if (ms >= max)
4359 return -ERANGE;
4360
4361 ms *= NSEC_PER_MSEC;
4362 *result = nsecs_to_jiffies64(ms);
4363 return 0;
4364}
4365
917d80d3 4366__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 4367{
3b15d09f 4368 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 4369}
4370
f3a2181e
SB		 4371static int nf_tables_fill_set_concat(struct sk_buff *skb,
4372 const struct nft_set *set)
4373{
4374 struct nlattr *concat, *field;
4375 int i;
4376
4377 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4378 if (!concat)
4379 return -ENOMEM;
4380
4381 for (i = 0; i < set->field_count; i++) {
4382 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4383 if (!field)
4384 return -ENOMEM;
4385
4386 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4387 htonl(set->field_len[i])))
4388 return -ENOMEM;
4389
4390 nla_nest_end(skb, field);
4391 }
4392
4393 nla_nest_end(skb, concat);
4394
4395 return 0;
4396}
4397
20a69341
PM		 4398static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4399 const struct nft_set *set, u16 event, u16 flags)
4400{
123b9961
PNA		 4401 u64 timeout = READ_ONCE(set->timeout);
4402 u32 gc_int = READ_ONCE(set->gc_int);
128ad332 4403 u32 portid = ctx->portid;
123b9961 4404 struct nlmsghdr *nlh;
65038428 4405 struct nlattr *nest;
128ad332 4406 u32 seq = ctx->seq;
48b0ae04 4407 int i;
20a69341 4408
dedb67c4 4409 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4410 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4411 NFNETLINK_V0, nft_base_seq(ctx->net));
4412 if (!nlh)
20a69341
PM		 4413 goto nla_put_failure;
4414
20a69341
PM		 4415 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4416 goto nla_put_failure;
4417 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4418 goto nla_put_failure;
3ecbfd65
HS		 4419 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4420 NFTA_SET_PAD))
4421 goto nla_put_failure;
28339b21
PNA		 4422
4423 if (event == NFT_MSG_DELSET) {
4424 nlmsg_end(skb, nlh);
4425 return 0;
4426 }
4427
20a69341
PM		 4428 if (set->flags != 0)
4429 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4430 goto nla_put_failure;
4431
4432 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4433 goto nla_put_failure;
4434 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4435 goto nla_put_failure;
4436 if (set->flags & NFT_SET_MAP) {
4437 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4438 goto nla_put_failure;
4439 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4440 goto nla_put_failure;
4441 }
8aeff920
PNA		 4442 if (set->flags & NFT_SET_OBJECT &&
4443 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4444 goto nla_put_failure;
20a69341 4445
123b9961 4446 if (timeout &&
d3e2a111 4447 nla_put_be64(skb, NFTA_SET_TIMEOUT,
123b9961 4448 nf_jiffies64_to_msecs(timeout),
b46f6ded 4449 NFTA_SET_PAD))
761da293 4450 goto nla_put_failure;
123b9961
PNA		 4451 if (gc_int &&
4452 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(gc_int)))
761da293
PM		 4453 goto nla_put_failure;
4454
9363dc4b
AB		 4455 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4456 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4457 goto nla_put_failure;
4458 }
4459
6f03bf43
PNA		 4460 if (set->udata &&
4461 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4462 goto nla_put_failure;
4463
65038428
PNA		 4464 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4465 if (!nest)
c50b960c
PM		 4466 goto nla_put_failure;
4467 if (set->size &&
4468 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4469 goto nla_put_failure;
f3a2181e
SB		 4470
4471 if (set->field_count > 1 &&
4472 nf_tables_fill_set_concat(skb, set))
4473 goto nla_put_failure;
4474
65038428
PNA		 4475 nla_nest_end(skb, nest);
4476
8cfd9b0f 4477 if (set->num_exprs == 1) {
65038428 4478 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8daa8fde 4479 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
65038428
PNA		 4480 goto nla_put_failure;
4481
4482 nla_nest_end(skb, nest);
48b0ae04
PNA		 4483 } else if (set->num_exprs > 1) {
4484 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4485 if (nest == NULL)
65038428
PNA		 4486 goto nla_put_failure;
4487
48b0ae04
PNA		 4488 for (i = 0; i < set->num_exprs; i++) {
4489 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
8daa8fde 4490 set->exprs[i], false) < 0)
48b0ae04
PNA		 4491 goto nla_put_failure;
4492 }
65038428
PNA		 4493 nla_nest_end(skb, nest);
4494 }
c50b960c 4495
053c095a
JB		 4496 nlmsg_end(skb, nlh);
4497 return 0;
20a69341
PM		 4498
4499nla_put_failure:
4500 nlmsg_trim(skb, nlh);
4501 return -1;
4502}
4503
25e94a99
PNA		 4504static void nf_tables_set_notify(const struct nft_ctx *ctx,
4505 const struct nft_set *set, int event,
4506 gfp_t gfp_flags)
20a69341 4507{
d59d2f82 4508 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4509 u32 portid = ctx->portid;
6fb721cf
PNA		 4510 struct sk_buff *skb;
4511 u16 flags = 0;
20a69341
PM		 4512 int err;
4513
128ad332
PNA		 4514 if (!ctx->report &&
4515 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4516 return;
20a69341 4517
31f8441c 4518 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4519 if (skb == NULL)
4520 goto err;
4521
6fb721cf
PNA		 4522 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4523 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4524
4525 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4526 if (err < 0) {
4527 kfree_skb(skb);
4528 goto err;
4529 }
4530
0854db2a 4531 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4532 return;
20a69341 4533err:
25e94a99 4534 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4535}
4536
5b96af77 4537static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4538{
4539 const struct nft_set *set;
4540 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4541 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4542 struct net *net = sock_net(skb->sk);
5b96af77 4543 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4544 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4545
4546 if (cb->args[1])
4547 return skb->len;
4548
e688a7f8 4549 rcu_read_lock();
d59d2f82 4550 nft_net = nft_pernet(net);
34002783 4551 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4552
0854db2a 4553 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4554 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4555 ctx->family != table->family)
36596dad
PNA		 4556 continue;
4557
4558 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4559 continue;
4560
36596dad
PNA		 4561 if (cur_table) {
4562 if (cur_table != table)
c9c8e485
PNA		 4563 continue;
4564
36596dad 4565 cur_table = NULL;
c9c8e485 4566 }
36596dad
PNA		 4567 idx = 0;
4568 list_for_each_entry_rcu(set, &table->sets, list) {
4569 if (idx < s_idx)
4570 goto cont;
4571 if (!nft_is_active(net, set))
4572 goto cont;
5b96af77 4573
36596dad
PNA		 4574 ctx_set = *ctx;
4575 ctx_set.table = table;
98319cb9 4576 ctx_set.family = table->family;
c9c8e485 4577
36596dad
PNA		 4578 if (nf_tables_fill_set(skb, &ctx_set, set,
4579 NFT_MSG_NEWSET,
4580 NLM_F_MULTI) < 0) {
4581 cb->args[0] = idx;
4582 cb->args[2] = (unsigned long) table;
4583 goto done;
c9c8e485 4584 }
36596dad 4585 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4586cont:
36596dad 4587 idx++;
c9c8e485 4588 }
36596dad
PNA		 4589 if (s_idx)
4590 s_idx = 0;
c9c8e485
PNA		 4591 }
4592 cb->args[1] = 1;
4593done:
e688a7f8 4594 rcu_read_unlock();
c9c8e485
PNA		 4595 return skb->len;
4596}
4597
90fd131a
FW		 4598static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4599{
4600 struct nft_ctx *ctx_dump = NULL;
4601
4602 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4603 if (ctx_dump == NULL)
4604 return -ENOMEM;
4605
4606 cb->data = ctx_dump;
4607 return 0;
4608}
4609
5b96af77 4610static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4611{
5b96af77
PNA		 4612 kfree(cb->data);
4613 return 0;
20a69341
PM		 4614}
4615
d9adf22a 4616/* called with rcu_read_lock held */
797d4980
PNA		 4617static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4618 const struct nlattr * const nla[])
20a69341 4619{
797d4980
PNA		 4620 struct netlink_ext_ack *extack = info->extack;
4621 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4622 u8 family = info->nfmsg->nfgen_family;
4623 struct nft_table *table = NULL;
797d4980 4624 struct net *net = info->net;
20a69341 4625 const struct nft_set *set;
20a69341 4626 struct sk_buff *skb2;
797d4980 4627 struct nft_ctx ctx;
20a69341
PM		 4628 int err;
4629
67086651
PNA		 4630 if (nla[NFTA_SET_TABLE]) {
4631 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4632 genmask, 0);
4633 if (IS_ERR(table)) {
4634 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4635 return PTR_ERR(table);
4636 }
4637 }
4638
4639 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4640
797d4980 4641 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4642 struct netlink_dump_control c = {
90fd131a 4643 .start = nf_tables_dump_sets_start,
20a69341 4644 .dump = nf_tables_dump_sets,
5b96af77 4645 .done = nf_tables_dump_sets_done,
90fd131a 4646 .data = &ctx,
d9adf22a 4647 .module = THIS_MODULE,
20a69341 4648 };
5b96af77 4649
797d4980 4650 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4651 }
4652
c9c8e485 4653 /* Only accept unspec with dump */
ef4b65e5 4654 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4655 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4656 if (!nla[NFTA_SET_TABLE])
4657 return -EINVAL;
c9c8e485 4658
67086651 4659 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341
PM		 4660 if (IS_ERR(set))
4661 return PTR_ERR(set);
4662
d9adf22a 4663 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4664 if (skb2 == NULL)
4665 return -ENOMEM;
4666
4667 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4668 if (err < 0)
ee921183 4669 goto err_fill_set_info;
20a69341 4670
ee921183 4671 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4672
ee921183 4673err_fill_set_info:
20a69341
PM		 4674 kfree_skb(skb2);
4675 return err;
4676}
4677
f3a2181e
SB		 4678static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4679 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4680};
4681
4682static int nft_set_desc_concat_parse(const struct nlattr *attr,
4683 struct nft_set_desc *desc)
4684{
4685 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4686 u32 len;
4687 int err;
4688
fecf31ee
PNA		 4689 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4690 return -E2BIG;
4691
f3a2181e
SB		 4692 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4693 nft_concat_policy, NULL);
4694 if (err < 0)
4695 return err;
4696
4697 if (!tb[NFTA_SET_FIELD_LEN])
4698 return -EINVAL;
4699
4700 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4701 if (!len || len > U8_MAX)
4702 return -EINVAL;
f3a2181e
SB		 4703
4704 desc->field_len[desc->field_count++] = len;
4705
4706 return 0;
4707}
4708
4709static int nft_set_desc_concat(struct nft_set_desc *desc,
4710 const struct nlattr *nla)
4711{
4712 struct nlattr *attr;
fecf31ee
PNA		 4713 u32 num_regs = 0;
4714 int rem, err, i;
f3a2181e
SB		 4715
4716 nla_for_each_nested(attr, nla, rem) {
4717 if (nla_type(attr) != NFTA_LIST_ELEM)
4718 return -EINVAL;
4719
4720 err = nft_set_desc_concat_parse(attr, desc);
4721 if (err < 0)
4722 return err;
4723 }
4724
fecf31ee
PNA		 4725 for (i = 0; i < desc->field_count; i++)
4726 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4727
4728 if (num_regs > NFT_REG32_COUNT)
4729 return -E2BIG;
4730
f3a2181e
SB		 4731 return 0;
4732}
4733
f7e840ee 4734static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4735 const struct nlattr *nla)
4736{
4737 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4738 int err;
4739
8cb08174
JB		 4740 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4741 nft_set_desc_policy, NULL);
c50b960c
PM		 4742 if (err < 0)
4743 return err;
4744
4745 if (da[NFTA_SET_DESC_SIZE] != NULL)
4746 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4747 if (da[NFTA_SET_DESC_CONCAT])
4748 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4749
f3a2181e 4750 return err;
c50b960c
PM		 4751}
4752
a8fe4154
PNA		 4753static int nft_set_expr_alloc(struct nft_ctx *ctx, struct nft_set *set,
4754 const struct nlattr * const *nla,
4755 struct nft_expr **exprs, int *num_exprs,
4756 u32 flags)
4757{
4758 struct nft_expr *expr;
4759 int err, i;
4760
4761 if (nla[NFTA_SET_EXPR]) {
4762 expr = nft_set_elem_expr_alloc(ctx, set, nla[NFTA_SET_EXPR]);
4763 if (IS_ERR(expr)) {
4764 err = PTR_ERR(expr);
4765 goto err_set_expr_alloc;
4766 }
4767 exprs[0] = expr;
4768 (*num_exprs)++;
4769 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4770 struct nlattr *tmp;
4771 int left;
4772
4773 if (!(flags & NFT_SET_EXPR)) {
4774 err = -EINVAL;
4775 goto err_set_expr_alloc;
4776 }
4777 i = 0;
4778 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4779 if (i == NFT_SET_EXPR_MAX) {
4780 err = -E2BIG;
4781 goto err_set_expr_alloc;
4782 }
4783 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4784 err = -EINVAL;
4785 goto err_set_expr_alloc;
4786 }
4787 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
4788 if (IS_ERR(expr)) {
4789 err = PTR_ERR(expr);
4790 goto err_set_expr_alloc;
4791 }
4792 exprs[i++] = expr;
4793 (*num_exprs)++;
4794 }
4795 }
4796
4797 return 0;
4798
4799err_set_expr_alloc:
4800 for (i = 0; i < *num_exprs; i++)
4801 nft_expr_destroy(ctx, exprs[i]);
4802
4803 return err;
4804}
4805
f6594c37
PNA		 4806static bool nft_set_is_same(const struct nft_set *set,
4807 const struct nft_set_desc *desc,
4808 struct nft_expr *exprs[], u32 num_exprs, u32 flags)
4809{
4810 int i;
4811
4812 if (set->ktype != desc->ktype ||
4813 set->dtype != desc->dtype ||
4814 set->flags != flags ||
4815 set->klen != desc->klen ||
4816 set->dlen != desc->dlen ||
4817 set->field_count != desc->field_count ||
4818 set->num_exprs != num_exprs)
4819 return false;
4820
4821 for (i = 0; i < desc->field_count; i++) {
4822 if (set->field_len[i] != desc->field_len[i])
4823 return false;
4824 }
4825
4826 for (i = 0; i < num_exprs; i++) {
4827 if (set->exprs[i]->ops != exprs[i]->ops)
4828 return false;
4829 }
4830
4831 return true;
4832}
4833
7dab8ee3
PNA		 4834static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4835 const struct nlattr * const nla[])
20a69341 4836{
7dab8ee3
PNA		 4837 struct netlink_ext_ack *extack = info->extack;
4838 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4839 u8 family = info->nfmsg->nfgen_family;
20a69341 4840 const struct nft_set_ops *ops;
7dab8ee3
PNA		 4841 struct net *net = info->net;
4842 struct nft_set_desc desc;
20a69341 4843 struct nft_table *table;
7dab8ee3 4844 unsigned char *udata;
20a69341
PM		 4845 struct nft_set *set;
4846 struct nft_ctx ctx;
6c8774a9 4847 size_t alloc_size;
a8fe4154 4848 int num_exprs = 0;
7dab8ee3
PNA		 4849 char *name;
4850 int err, i;
e6d8ecac 4851 u16 udlen;
bed4a63e 4852 u32 flags;
7dab8ee3 4853 u64 size;
20a69341
PM		 4854
4855 if (nla[NFTA_SET_TABLE] == NULL ||
4856 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4857 nla[NFTA_SET_KEY_LEN] == NULL ||
4858 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4859 return -EINVAL;
4860
c50b960c
PM		 4861 memset(&desc, 0, sizeof(desc));
4862
bed4a63e 4863 desc.ktype = NFT_DATA_VALUE;
20a69341 4864 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
bed4a63e
PNA		 4865 desc.ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4866 if ((desc.ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
20a69341
PM		 4867 return -EINVAL;
4868 }
4869
c50b960c 4870 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4871 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4872 return -EINVAL;
4873
4874 flags = 0;
4875 if (nla[NFTA_SET_FLAGS] != NULL) {
4876 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4877 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4878 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4879 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4880 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4881 return -EOPNOTSUPP;
8aeff920 4882 /* Only one of these operations is supported */
acab7131
FW		 4883 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4884 (NFT_SET_MAP | NFT_SET_OBJECT))
4885 return -EOPNOTSUPP;
4886 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4887 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4888 return -EOPNOTSUPP;
20a69341
PM		 4889 }
4890
bed4a63e 4891 desc.dtype = 0;
20a69341
PM		 4892 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4893 if (!(flags & NFT_SET_MAP))
4894 return -EINVAL;
4895
bed4a63e
PNA		 4896 desc.dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4897 if ((desc.dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4898 desc.dtype != NFT_DATA_VERDICT)
20a69341
PM		 4899 return -EINVAL;
4900
bed4a63e 4901 if (desc.dtype != NFT_DATA_VERDICT) {
20a69341
PM		 4902 if (nla[NFTA_SET_DATA_LEN] == NULL)
4903 return -EINVAL;
c50b960c 4904 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4905 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4906 return -EINVAL;
4907 } else
7d740264 4908 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 4909 } else if (flags & NFT_SET_MAP)
4910 return -EINVAL;
4911
8aeff920
PNA		 4912 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4913 if (!(flags & NFT_SET_OBJECT))
4914 return -EINVAL;
4915
bed4a63e
PNA		 4916 desc.objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4917 if (desc.objtype == NFT_OBJECT_UNSPEC ||
4918 desc.objtype > NFT_OBJECT_MAX)
d9583cdf 4919 return -EOPNOTSUPP;
8aeff920
PNA		 4920 } else if (flags & NFT_SET_OBJECT)
4921 return -EINVAL;
4922 else
bed4a63e 4923 desc.objtype = NFT_OBJECT_UNSPEC;
8aeff920 4924
bed4a63e 4925 desc.timeout = 0;
761da293
PM		 4926 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4927 if (!(flags & NFT_SET_TIMEOUT))
4928 return -EINVAL;
8e1102d5 4929
e26d3009
PNA		 4930 if (flags & NFT_SET_ANONYMOUS)
4931 return -EOPNOTSUPP;
4932
bed4a63e 4933 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &desc.timeout);
8e1102d5
FW		 4934 if (err)
4935 return err;
761da293 4936 }
bed4a63e 4937 desc.gc_int = 0;
761da293
PM		 4938 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4939 if (!(flags & NFT_SET_TIMEOUT))
4940 return -EINVAL;
e26d3009
PNA		 4941
4942 if (flags & NFT_SET_ANONYMOUS)
4943 return -EOPNOTSUPP;
4944
bed4a63e 4945 desc.gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
761da293
PM		 4946 }
4947
bed4a63e 4948 desc.policy = NFT_SET_POL_PERFORMANCE;
c50b960c 4949 if (nla[NFTA_SET_POLICY] != NULL)
bed4a63e 4950 desc.policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
c50b960c
PM		 4951
4952 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 4953 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 4954 if (err < 0)
4955 return err;
1b6345d4
PNA		 4956
4957 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4958 return -EINVAL;
4959 } else if (flags & NFT_SET_CONCAT) {
4960 return -EINVAL;
c50b960c
PM		 4961 }
4962
48b0ae04 4963 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 4964 desc.expr = true;
4965
6001a930
PNA		 4966 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4967 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4968 if (IS_ERR(table)) {
4969 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 4970 return PTR_ERR(table);
36dd1bcc 4971 }
20a69341 4972
7dab8ee3 4973 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4974
cac20fcd 4975 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 4976 if (IS_ERR(set)) {
36dd1bcc
PNA		 4977 if (PTR_ERR(set) != -ENOENT) {
4978 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4979 return PTR_ERR(set);
36dd1bcc 4980 }
1a28ad74 4981 } else {
a8fe4154
PNA		 4982 struct nft_expr *exprs[NFT_SET_EXPR_MAX] = {};
4983
7dab8ee3 4984 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 4985 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4986 return -EEXIST;
36dd1bcc 4987 }
7dab8ee3 4988 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 4989 return -EOPNOTSUPP;
36dd1bcc 4990
b770283c
PNA		 4991 if (nft_set_is_anonymous(set))
4992 return -EOPNOTSUPP;
4993
a8fe4154
PNA		 4994 err = nft_set_expr_alloc(&ctx, set, nla, exprs, &num_exprs, flags);
4995 if (err < 0)
4996 return err;
4997
f6594c37
PNA		 4998 err = 0;
4999 if (!nft_set_is_same(set, &desc, exprs, num_exprs, flags)) {
5000 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
5001 err = -EEXIST;
5002 }
5003
a8fe4154
PNA		 5004 for (i = 0; i < num_exprs; i++)
5005 nft_expr_destroy(&ctx, exprs[i]);
5006
123b9961
PNA		 5007 if (err < 0)
5008 return err;
5009
5010 return __nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set, &desc);
20a69341
PM		 5011 }
5012
7dab8ee3 5013 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 5014 return -ENOENT;
5015
bed4a63e 5016 ops = nft_select_set_ops(&ctx, nla, &desc);
20a69341
PM		 5017 if (IS_ERR(ops))
5018 return PTR_ERR(ops);
5019
e6d8ecac
CFG		 5020 udlen = 0;
5021 if (nla[NFTA_SET_USERDATA])
5022 udlen = nla_len(nla[NFTA_SET_USERDATA]);
5023
20a69341
PM		 5024 size = 0;
5025 if (ops->privsize != NULL)
347b408d 5026 size = ops->privsize(nla, &desc);
6c8774a9 5027 alloc_size = sizeof(*set) + size + udlen;
45928afe 5028 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 5029 return -ENOMEM;
1689f259
PNA		 5030
5031 if (!nft_use_inc(&table->use))
5032 return -EMFILE;
5033
33758c89 5034 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
1689f259
PNA		 5035 if (!set) {
5036 err = -ENOMEM;
5037 goto err_alloc;
5038 }
20a69341 5039
33758c89 5040 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 5041 if (!name) {
5042 err = -ENOMEM;
65038428 5043 goto err_set_name;
38745490
PS		 5044 }
5045
20a69341 5046 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 5047 kfree(name);
20a69341 5048 if (err < 0)
ad9f151e
PNA		 5049 goto err_set_name;
5050
5051 udata = NULL;
5052 if (udlen) {
5053 udata = set->data + size;
5054 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
5055 }
5056
5057 INIT_LIST_HEAD(&set->bindings);
5058 INIT_LIST_HEAD(&set->catchall_list);
5f68718b 5059 refcount_set(&set->refs, 1);
ad9f151e
PNA		 5060 set->table = table;
5061 write_pnet(&set->net, net);
5062 set->ops = ops;
bed4a63e 5063 set->ktype = desc.ktype;
ad9f151e 5064 set->klen = desc.klen;
bed4a63e
PNA		 5065 set->dtype = desc.dtype;
5066 set->objtype = desc.objtype;
ad9f151e
PNA		 5067 set->dlen = desc.dlen;
5068 set->flags = flags;
5069 set->size = desc.size;
bed4a63e 5070 set->policy = desc.policy;
ad9f151e
PNA		 5071 set->udlen = udlen;
5072 set->udata = udata;
bed4a63e
PNA		 5073 set->timeout = desc.timeout;
5074 set->gc_int = desc.gc_int;
ad9f151e
PNA		 5075
5076 set->field_count = desc.field_count;
5077 for (i = 0; i < desc.field_count; i++)
5078 set->field_len[i] = desc.field_len[i];
5079
5080 err = ops->init(set, &desc, nla);
5081 if (err < 0)
5082 goto err_set_init;
65038428 5083
a8fe4154
PNA		 5084 err = nft_set_expr_alloc(&ctx, set, nla, set->exprs, &num_exprs, flags);
5085 if (err < 0)
5086 goto err_set_destroy;
20a69341 5087
a8fe4154 5088 set->num_exprs = num_exprs;
3ecbfd65 5089 set->handle = nf_tables_alloc_handle(table);
212ed75d 5090 INIT_LIST_HEAD(&set->pending_update);
20a69341 5091
958bee14 5092 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 5093 if (err < 0)
ad9f151e 5094 goto err_set_expr_alloc;
20a69341 5095
e688a7f8 5096 list_add_tail_rcu(&set->list, &table->sets);
1689f259 5097
20a69341
PM		 5098 return 0;
5099
ad9f151e 5100err_set_expr_alloc:
8cfd9b0f
PNA		 5101 for (i = 0; i < set->num_exprs; i++)
5102 nft_expr_destroy(&ctx, set->exprs[i]);
a8fe4154 5103err_set_destroy:
628bd3e4 5104 ops->destroy(&ctx, set);
ad9f151e 5105err_set_init:
2f6adf48 5106 kfree(set->name);
65038428 5107err_set_name:
1ff75a3e 5108 kvfree(set);
1689f259
PNA		 5109err_alloc:
5110 nft_use_dec_restore(&table->use);
5111
20a69341
PM		 5112 return err;
5113}
5114
aaa31047
PNA		 5115static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
5116 struct nft_set *set)
5117{
0f7d9b31 5118 struct nft_set_elem_catchall *next, *catchall;
aaa31047 5119
0f7d9b31 5120 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047 5121 list_del_rcu(&catchall->list);
628bd3e4 5122 nf_tables_set_elem_destroy(ctx, set, catchall->elem);
ae089831 5123 kfree_rcu(catchall, rcu);
aaa31047
PNA		 5124 }
5125}
5126
5f68718b
PNA		 5127static void nft_set_put(struct nft_set *set)
5128{
5129 if (refcount_dec_and_test(&set->refs)) {
5130 kfree(set->name);
5131 kvfree(set);
5132 }
5133}
5134
0c2a85ed 5135static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 5136{
8cfd9b0f
PNA		 5137 int i;
5138
273fe3f1
PNA		 5139 if (WARN_ON(set->use > 0))
5140 return;
5141
8cfd9b0f
PNA		 5142 for (i = 0; i < set->num_exprs; i++)
5143 nft_expr_destroy(ctx, set->exprs[i]);
65038428 5144
628bd3e4 5145 set->ops->destroy(ctx, set);
aaa31047 5146 nft_set_catchall_destroy(ctx, set);
5f68718b 5147 nft_set_put(set);
20a69341
PM		 5148}
5149
7dab8ee3
PNA		 5150static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
5151 const struct nlattr * const nla[])
20a69341 5152{
7dab8ee3
PNA		 5153 struct netlink_ext_ack *extack = info->extack;
5154 u8 genmask = nft_genmask_next(info->net);
67086651 5155 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 5156 struct net *net = info->net;
36dd1bcc 5157 const struct nlattr *attr;
67086651 5158 struct nft_table *table;
20a69341
PM		 5159 struct nft_set *set;
5160 struct nft_ctx ctx;
20a69341 5161
ef4b65e5 5162 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 5163 return -EAFNOSUPPORT;
20a69341 5164
67086651
PNA		 5165 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
5166 genmask, NETLINK_CB(skb).portid);
5167 if (IS_ERR(table)) {
5168 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
5169 return PTR_ERR(table);
5170 }
20a69341 5171
36dd1bcc
PNA		 5172 if (nla[NFTA_SET_HANDLE]) {
5173 attr = nla[NFTA_SET_HANDLE];
67086651 5174 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 5175 } else {
5176 attr = nla[NFTA_SET_NAME];
67086651 5177 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 5178 }
a8278400 5179
36dd1bcc 5180 if (IS_ERR(set)) {
f80a612d
FFM		 5181 if (PTR_ERR(set) == -ENOENT &&
5182 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
5183 return 0;
5184
36dd1bcc
PNA		 5185 NL_SET_BAD_ATTR(extack, attr);
5186 return PTR_ERR(set);
5187 }
273fe3f1 5188 if (set->use ||
7dab8ee3
PNA		 5189 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
5190 atomic_read(&set->nelems) > 0)) {
36dd1bcc 5191 NL_SET_BAD_ATTR(extack, attr);
20a69341 5192 return -EBUSY;
36dd1bcc 5193 }
20a69341 5194
67086651
PNA		 5195 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5196
ee01d542 5197 return nft_delset(&ctx, set);
20a69341
PM		 5198}
5199
345023b0
PNA		 5200static int nft_validate_register_store(const struct nft_ctx *ctx,
5201 enum nft_registers reg,
5202 const struct nft_data *data,
5203 enum nft_data_types type,
5204 unsigned int len);
5205
97c976d6
PNA		 5206static int nft_setelem_data_validate(const struct nft_ctx *ctx,
5207 struct nft_set *set,
5208 struct nft_set_elem *elem)
20a69341 5209{
fe2811eb 5210 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5211 enum nft_registers dreg;
5212
5213 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 5214 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
5215 set->dtype == NFT_DATA_VERDICT ?
5216 NFT_DATA_VERDICT : NFT_DATA_VALUE,
5217 set->dlen);
20a69341
PM		 5218}
5219
97c976d6
PNA		 5220static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
5221 struct nft_set *set,
5222 const struct nft_set_iter *iter,
5223 struct nft_set_elem *elem)
5224{
5225 return nft_setelem_data_validate(ctx, set, elem);
5226}
5227
aaa31047
PNA		 5228static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
5229 struct nft_set *set)
5230{
5231 u8 genmask = nft_genmask_next(ctx->net);
5232 struct nft_set_elem_catchall *catchall;
5233 struct nft_set_elem elem;
5234 struct nft_set_ext *ext;
5235 int ret = 0;
5236
5237 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5238 ext = nft_set_elem_ext(set, catchall->elem);
5239 if (!nft_set_elem_active(ext, genmask))
5240 continue;
5241
5242 elem.priv = catchall->elem;
5243 ret = nft_setelem_data_validate(ctx, set, &elem);
5244 if (ret < 0)
5245 break;
5246 }
5247
5248 return ret;
5249}
5250
20a69341
PM		 5251int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
5252 struct nft_set_binding *binding)
5253{
5254 struct nft_set_binding *i;
5255 struct nft_set_iter iter;
5256
408070d6 5257 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 5258 return -EBUSY;
5259
11113e19 5260 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 5261 /* If the set is already bound to the same chain all
5262 * jumps are already validated for that chain.
5263 */
5264 list_for_each_entry(i, &set->bindings, list) {
a4684402 5265 if (i->flags & NFT_SET_MAP &&
11113e19 5266 i->chain == binding->chain)
20a69341
PM		 5267 goto bind;
5268 }
5269
8588ac09 5270 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 5271 iter.skip = 0;
5272 iter.count = 0;
5273 iter.err = 0;
5274 iter.fn = nf_tables_bind_check_setelem;
5275
5276 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 5277 if (!iter.err)
5278 iter.err = nft_set_catchall_bind_check(ctx, set);
5279
a02f4248 5280 if (iter.err < 0)
20a69341 5281 return iter.err;
20a69341
PM		 5282 }
5283bind:
1689f259
PNA		 5284 if (!nft_use_inc(&set->use))
5285 return -EMFILE;
5286
20a69341 5287 binding->chain = ctx->chain;
e688a7f8 5288 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585
PNA		 5289 nft_set_trans_bind(ctx, set);
5290
20a69341
PM		 5291 return 0;
5292}
63aea290 5293EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 5294
3b0a081d
FW		 5295static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
5296 struct nft_set_binding *binding, bool event)
20a69341 5297{
e688a7f8 5298 list_del_rcu(&binding->list);
20a69341 5299
f6ac8585 5300 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 5301 list_del_rcu(&set->list);
f6ac8585
PNA		 5302 if (event)
5303 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
5304 GFP_KERNEL);
5305 }
20a69341
PM		 5306}
5307
628bd3e4
PNA		 5308static void nft_setelem_data_activate(const struct net *net,
5309 const struct nft_set *set,
5310 struct nft_set_elem *elem);
5311
5312static int nft_mapelem_activate(const struct nft_ctx *ctx,
5313 struct nft_set *set,
5314 const struct nft_set_iter *iter,
5315 struct nft_set_elem *elem)
5316{
5317 nft_setelem_data_activate(ctx->net, set, elem);
5318
5319 return 0;
5320}
5321
5322static void nft_map_catchall_activate(const struct nft_ctx *ctx,
5323 struct nft_set *set)
5324{
5325 u8 genmask = nft_genmask_next(ctx->net);
5326 struct nft_set_elem_catchall *catchall;
5327 struct nft_set_elem elem;
5328 struct nft_set_ext *ext;
5329
5330 list_for_each_entry(catchall, &set->catchall_list, list) {
5331 ext = nft_set_elem_ext(set, catchall->elem);
5332 if (!nft_set_elem_active(ext, genmask))
5333 continue;
5334
5335 elem.priv = catchall->elem;
5336 nft_setelem_data_activate(ctx->net, set, &elem);
5337 break;
5338 }
5339}
5340
5341static void nft_map_activate(const struct nft_ctx *ctx, struct nft_set *set)
5342{
5343 struct nft_set_iter iter = {
5344 .genmask = nft_genmask_next(ctx->net),
5345 .fn = nft_mapelem_activate,
5346 };
5347
5348 set->ops->walk(ctx, set, &iter);
5349 WARN_ON_ONCE(iter.err);
5350
5351 nft_map_catchall_activate(ctx, set);
5352}
5353
c1592a89
PNA		 5354void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set)
5355{
628bd3e4
PNA		 5356 if (nft_set_is_anonymous(set)) {
5357 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5358 nft_map_activate(ctx, set);
5359
c1592a89 5360 nft_clear(ctx->net, set);
628bd3e4 5361 }
c1592a89 5362
1689f259 5363 nft_use_inc_restore(&set->use);
c1592a89
PNA		 5364}
5365EXPORT_SYMBOL_GPL(nf_tables_activate_set);
5366
273fe3f1
PNA		 5367void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
5368 struct nft_set_binding *binding,
5369 enum nft_trans_phase phase)
5370{
5371 switch (phase) {
26b5a571
PNA		 5372 case NFT_TRANS_PREPARE_ERROR:
5373 nft_set_trans_unbind(ctx, set);
c1592a89
PNA		 5374 if (nft_set_is_anonymous(set))
5375 nft_deactivate_next(ctx->net, set);
3e704897
PNA		 5376 else
5377 list_del_rcu(&binding->list);
c1592a89 5378
1689f259 5379 nft_use_dec(&set->use);
26b5a571 5380 break;
273fe3f1 5381 case NFT_TRANS_PREPARE:
628bd3e4
PNA		 5382 if (nft_set_is_anonymous(set)) {
5383 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5384 nft_map_deactivate(ctx, set);
c1592a89 5385
628bd3e4
PNA		 5386 nft_deactivate_next(ctx->net, set);
5387 }
1689f259 5388 nft_use_dec(&set->use);
273fe3f1
PNA		 5389 return;
5390 case NFT_TRANS_ABORT:
5391 case NFT_TRANS_RELEASE:
628bd3e4
PNA		 5392 if (nft_set_is_anonymous(set) &&
5393 set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5394 nft_map_deactivate(ctx, set);
5395
1689f259 5396 nft_use_dec(&set->use);
954d8297 5397 fallthrough;
273fe3f1
PNA		 5398 default:
5399 nf_tables_unbind_set(ctx, set, binding,
5400 phase == NFT_TRANS_COMMIT);
5401 }
5402}
5403EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
5404
cd5125d8
FW		 5405void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
5406{
f6ac8585 5407 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 5408 nft_set_destroy(ctx, set);
cd5125d8
FW		 5409}
5410EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
5411
3ac4c07a
PM		 5412const struct nft_set_ext_type nft_set_ext_types[] = {
5413 [NFT_SET_EXT_KEY] = {
7d740264 5414 .align = __alignof__(u32),
3ac4c07a
PM		 5415 },
5416 [NFT_SET_EXT_DATA] = {
7d740264 5417 .align = __alignof__(u32),
3ac4c07a 5418 },
563125a7
PNA		 5419 [NFT_SET_EXT_EXPRESSIONS] = {
5420 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 5421 },
8aeff920
PNA		 5422 [NFT_SET_EXT_OBJREF] = {
5423 .len = sizeof(struct nft_object *),
5424 .align = __alignof__(struct nft_object *),
5425 },
3ac4c07a
PM		 5426 [NFT_SET_EXT_FLAGS] = {
5427 .len = sizeof(u8),
5428 .align = __alignof__(u8),
5429 },
c3e1b005
PM		 5430 [NFT_SET_EXT_TIMEOUT] = {
5431 .len = sizeof(u64),
5432 .align = __alignof__(u64),
5433 },
5434 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 5435 .len = sizeof(u64),
5436 .align = __alignof__(u64),
c3e1b005 5437 },
68e942e8
PM		 5438 [NFT_SET_EXT_USERDATA] = {
5439 .len = sizeof(struct nft_userdata),
5440 .align = __alignof__(struct nft_userdata),
5441 },
7b225d0b
PNA		 5442 [NFT_SET_EXT_KEY_END] = {
5443 .align = __alignof__(u32),
5444 },
3ac4c07a 5445};
3ac4c07a 5446
20a69341
PM		 5447/*
5448 * Set elements
5449 */
5450
5451static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
5452 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
5453 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
5454 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 5455 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 5456 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 5457 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
5458 .len = NFT_USERDATA_MAXLEN },
467697d2 5459 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 5460 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
5461 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 5462 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
48b0ae04 5463 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
20a69341
PM		 5464};
5465
5466static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 5467 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
5468 .len = NFT_TABLE_MAXNAMELEN - 1 },
5469 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
5470 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341 5471 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
958bee14 5472 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 5473};
5474
563125a7
PNA		 5475static int nft_set_elem_expr_dump(struct sk_buff *skb,
5476 const struct nft_set *set,
079cd633
PS		 5477 const struct nft_set_ext *ext,
5478 bool reset)
563125a7
PNA		 5479{
5480 struct nft_set_elem_expr *elem_expr;
5481 u32 size, num_exprs = 0;
5482 struct nft_expr *expr;
48b0ae04 5483 struct nlattr *nest;
563125a7
PNA		 5484
5485 elem_expr = nft_set_ext_expr(ext);
5486 nft_setelem_expr_foreach(expr, elem_expr, size)
5487 num_exprs++;
5488
5489 if (num_exprs == 1) {
5490 expr = nft_setelem_expr_at(elem_expr, 0);
079cd633 5491 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, reset) < 0)
563125a7
PNA		 5492 return -1;
5493
5494 return 0;
48b0ae04
PNA		 5495 } else if (num_exprs > 1) {
5496 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
5497 if (nest == NULL)
5498 goto nla_put_failure;
563125a7 5499
48b0ae04
PNA		 5500 nft_setelem_expr_foreach(expr, elem_expr, size) {
5501 expr = nft_setelem_expr_at(elem_expr, size);
079cd633 5502 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
48b0ae04
PNA		 5503 goto nla_put_failure;
5504 }
5505 nla_nest_end(skb, nest);
5506 }
563125a7 5507 return 0;
48b0ae04
PNA		 5508
5509nla_put_failure:
5510 return -1;
563125a7
PNA		 5511}
5512
20a69341
PM		 5513static int nf_tables_fill_setelem(struct sk_buff *skb,
5514 const struct nft_set *set,
079cd633
PS		 5515 const struct nft_set_elem *elem,
5516 bool reset)
20a69341 5517{
fe2811eb 5518 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5519 unsigned char *b = skb_tail_pointer(skb);
5520 struct nlattr *nest;
079cd633 5521 u64 timeout = 0;
20a69341 5522
ae0be8de 5523 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 5524 if (nest == NULL)
5525 goto nla_put_failure;
5526
aaa31047
PNA		 5527 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5528 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 5529 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 5530 goto nla_put_failure;
5531
7b225d0b
PNA		 5532 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5533 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5534 NFT_DATA_VALUE, set->klen) < 0)
5535 goto nla_put_failure;
5536
fe2811eb
PM		 5537 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5538 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 5539 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5540 set->dlen) < 0)
5541 goto nla_put_failure;
5542
563125a7 5543 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
079cd633 5544 nft_set_elem_expr_dump(skb, set, ext, reset))
f25ad2e9
PM		 5545 goto nla_put_failure;
5546
8aeff920
PNA		 5547 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5548 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 5549 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 5550 goto nla_put_failure;
5551
fe2811eb
PM		 5552 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5553 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5554 htonl(*nft_set_ext_flags(ext))))
5555 goto nla_put_failure;
20a69341 5556
079cd633
PS		 5557 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT)) {
5558 timeout = *nft_set_ext_timeout(ext);
5559 if (nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
5560 nf_jiffies64_to_msecs(timeout),
5561 NFTA_SET_ELEM_PAD))
5562 goto nla_put_failure;
5563 } else if (set->flags & NFT_SET_TIMEOUT) {
5564 timeout = READ_ONCE(set->timeout);
5565 }
c3e1b005
PM		 5566
5567 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 5568 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 5569
5570 expires = *nft_set_ext_expiration(ext);
8e1102d5 5571 if (time_before64(now, expires))
c3e1b005
PM		 5572 expires -= now;
5573 else
5574 expires = 0;
5575
5576 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 5577 nf_jiffies64_to_msecs(expires),
b46f6ded 5578 NFTA_SET_ELEM_PAD))
c3e1b005 5579 goto nla_put_failure;
079cd633
PS		 5580
5581 if (reset)
5582 *nft_set_ext_expiration(ext) = now + timeout;
c3e1b005
PM		 5583 }
5584
68e942e8
PM		 5585 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5586 struct nft_userdata *udata;
5587
5588 udata = nft_set_ext_userdata(ext);
5589 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5590 udata->len + 1, udata->data))
5591 goto nla_put_failure;
5592 }
5593
20a69341
PM		 5594 nla_nest_end(skb, nest);
5595 return 0;
5596
5597nla_put_failure:
5598 nlmsg_trim(skb, b);
5599 return -EMSGSIZE;
5600}
5601
5602struct nft_set_dump_args {
5603 const struct netlink_callback *cb;
5604 struct nft_set_iter iter;
5605 struct sk_buff *skb;
079cd633 5606 bool reset;
20a69341
PM		 5607};
5608
5609static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5610 struct nft_set *set,
20a69341 5611 const struct nft_set_iter *iter,
de70185d 5612 struct nft_set_elem *elem)
20a69341 5613{
24138933 5614 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5615 struct nft_set_dump_args *args;
5616
24138933
FW		 5617 if (nft_set_elem_expired(ext))
5618 return 0;
5619
20a69341 5620 args = container_of(iter, struct nft_set_dump_args, iter);
079cd633 5621 return nf_tables_fill_setelem(args->skb, set, elem, args->reset);
20a69341
PM		 5622}
5623
fa803605
LZ		 5624struct nft_set_dump_ctx {
5625 const struct nft_set *set;
5626 struct nft_ctx ctx;
5627};
5628
aaa31047 5629static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
079cd633 5630 const struct nft_set *set, bool reset)
aaa31047
PNA		 5631{
5632 struct nft_set_elem_catchall *catchall;
5633 u8 genmask = nft_genmask_cur(net);
5634 struct nft_set_elem elem;
5635 struct nft_set_ext *ext;
5636 int ret = 0;
5637
5638 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5639 ext = nft_set_elem_ext(set, catchall->elem);
5640 if (!nft_set_elem_active(ext, genmask) ||
5641 nft_set_elem_expired(ext))
5642 continue;
5643
5644 elem.priv = catchall->elem;
079cd633 5645 ret = nf_tables_fill_setelem(skb, set, &elem, reset);
aaa31047
PNA		 5646 break;
5647 }
5648
5649 return ret;
5650}
5651
20a69341
PM		 5652static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5653{
fa803605 5654 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5655 struct net *net = sock_net(skb->sk);
0854db2a 5656 struct nftables_pernet *nft_net;
fa803605 5657 struct nft_table *table;
de70185d 5658 struct nft_set *set;
20a69341 5659 struct nft_set_dump_args args;
fa803605 5660 bool set_found = false;
20a69341
PM		 5661 struct nlmsghdr *nlh;
5662 struct nlattr *nest;
079cd633 5663 bool reset = false;
20a69341 5664 u32 portid, seq;
fa803605 5665 int event;
20a69341 5666
fa803605 5667 rcu_read_lock();
d59d2f82 5668 nft_net = nft_pernet(net);
34002783
PNA		 5669 cb->seq = READ_ONCE(nft_net->base_seq);
5670
0854db2a 5671 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5672 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5673 dump_ctx->ctx.family != table->family)
fa803605 5674 continue;
20a69341 5675
36596dad
PNA		 5676 if (table != dump_ctx->ctx.table)
5677 continue;
20a69341 5678
36596dad
PNA		 5679 list_for_each_entry_rcu(set, &table->sets, list) {
5680 if (set == dump_ctx->set) {
5681 set_found = true;
5682 break;
fa803605 5683 }
fa803605
LZ		 5684 }
5685 break;
5686 }
5687
5688 if (!set_found) {
5689 rcu_read_unlock();
5690 return -ENOENT;
5691 }
20a69341 5692
dedb67c4 5693 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5694 portid = NETLINK_CB(cb->skb).portid;
5695 seq = cb->nlh->nlmsg_seq;
5696
19c28b13
PNA		 5697 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5698 table->family, NFNETLINK_V0, nft_base_seq(net));
5699 if (!nlh)
20a69341
PM		 5700 goto nla_put_failure;
5701
fa803605 5702 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5703 goto nla_put_failure;
5704 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5705 goto nla_put_failure;
5706
ae0be8de 5707 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5708 if (nest == NULL)
5709 goto nla_put_failure;
5710
079cd633
PS		 5711 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETSETELEM_RESET)
5712 reset = true;
5713
8588ac09
PNA		 5714 args.cb = cb;
5715 args.skb = skb;
079cd633 5716 args.reset = reset;
fa803605 5717 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5718 args.iter.skip = cb->args[0];
5719 args.iter.count = 0;
5720 args.iter.err = 0;
5721 args.iter.fn = nf_tables_dump_setelem;
fa803605 5722 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5723
5724 if (!args.iter.err && args.iter.count == cb->args[0])
079cd633 5725 args.iter.err = nft_set_catchall_dump(net, skb, set, reset);
fa803605 5726 rcu_read_unlock();
20a69341
PM		 5727
5728 nla_nest_end(skb, nest);
5729 nlmsg_end(skb, nlh);
5730
5731 if (args.iter.err && args.iter.err != -EMSGSIZE)
5732 return args.iter.err;
5733 if (args.iter.count == cb->args[0])
5734 return 0;
5735
5736 cb->args[0] = args.iter.count;
5737 return skb->len;
5738
5739nla_put_failure:
fa803605 5740 rcu_read_unlock();
20a69341
PM		 5741 return -ENOSPC;
5742}
5743
90fd131a
FW		 5744static int nf_tables_dump_set_start(struct netlink_callback *cb)
5745{
5746 struct nft_set_dump_ctx *dump_ctx = cb->data;
5747
5748 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5749
5750 return cb->data ? 0 : -ENOMEM;
5751}
5752
fa803605
LZ		 5753static int nf_tables_dump_set_done(struct netlink_callback *cb)
5754{
5755 kfree(cb->data);
5756 return 0;
5757}
5758
d60ce62f
AB		 5759static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5760 const struct nft_ctx *ctx, u32 seq,
5761 u32 portid, int event, u16 flags,
5762 const struct nft_set *set,
079cd633
PS		 5763 const struct nft_set_elem *elem,
5764 bool reset)
d60ce62f 5765{
d60ce62f
AB		 5766 struct nlmsghdr *nlh;
5767 struct nlattr *nest;
5768 int err;
5769
dedb67c4 5770 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5771 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5772 NFNETLINK_V0, nft_base_seq(ctx->net));
5773 if (!nlh)
d60ce62f
AB		 5774 goto nla_put_failure;
5775
d60ce62f
AB		 5776 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5777 goto nla_put_failure;
5778 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5779 goto nla_put_failure;
5780
ae0be8de 5781 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5782 if (nest == NULL)
5783 goto nla_put_failure;
5784
079cd633 5785 err = nf_tables_fill_setelem(skb, set, elem, reset);
d60ce62f
AB		 5786 if (err < 0)
5787 goto nla_put_failure;
5788
5789 nla_nest_end(skb, nest);
5790
053c095a
JB		 5791 nlmsg_end(skb, nlh);
5792 return 0;
d60ce62f
AB		 5793
5794nla_put_failure:
5795 nlmsg_trim(skb, nlh);
5796 return -1;
5797}
5798
ba0e4d99
PNA		 5799static int nft_setelem_parse_flags(const struct nft_set *set,
5800 const struct nlattr *attr, u32 *flags)
5801{
5802 if (attr == NULL)
5803 return 0;
5804
5805 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5806 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5807 return -EOPNOTSUPP;
ba0e4d99
PNA		 5808 if (!(set->flags & NFT_SET_INTERVAL) &&
5809 *flags & NFT_SET_ELEM_INTERVAL_END)
5810 return -EINVAL;
fc0ae524
PNA		 5811 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5812 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5813 return -EINVAL;
ba0e4d99
PNA		 5814
5815 return 0;
5816}
5817
20a1452c
PNA		 5818static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5819 struct nft_data *key, struct nlattr *attr)
5820{
341b6941
PNA		 5821 struct nft_data_desc desc = {
5822 .type = NFT_DATA_VALUE,
5823 .size = NFT_DATA_VALUE_MAXLEN,
5824 .len = set->klen,
5825 };
20a1452c 5826
341b6941 5827 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5828}
5829
fdb9c405
PNA		 5830static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5831 struct nft_data_desc *desc,
5832 struct nft_data *data,
5833 struct nlattr *attr)
5834{
7e6bc1f6 5835 u32 dtype;
fdb9c405 5836
7e6bc1f6
PNA		 5837 if (set->dtype == NFT_DATA_VERDICT)
5838 dtype = NFT_DATA_VERDICT;
5839 else
5840 dtype = NFT_DATA_VALUE;
5841
341b6941
PNA		 5842 desc->type = dtype;
5843 desc->size = NFT_DATA_VALUE_MAXLEN;
5844 desc->len = set->dlen;
f323ef3a 5845 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5846
341b6941 5847 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5848}
5849
aaa31047
PNA		 5850static void *nft_setelem_catchall_get(const struct net *net,
5851 const struct nft_set *set)
5852{
5853 struct nft_set_elem_catchall *catchall;
5854 u8 genmask = nft_genmask_cur(net);
5855 struct nft_set_ext *ext;
5856 void *priv = NULL;
5857
5858 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5859 ext = nft_set_elem_ext(set, catchall->elem);
5860 if (!nft_set_elem_active(ext, genmask) ||
5861 nft_set_elem_expired(ext))
5862 continue;
5863
5864 priv = catchall->elem;
5865 break;
5866 }
5867
5868 return priv;
5869}
5870
5871static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5872 struct nft_set_elem *elem, u32 flags)
5873{
5874 void *priv;
5875
5876 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5877 priv = set->ops->get(ctx->net, set, elem, flags);
5878 if (IS_ERR(priv))
5879 return PTR_ERR(priv);
5880 } else {
5881 priv = nft_setelem_catchall_get(ctx->net, set);
5882 if (!priv)
5883 return -ENOENT;
5884 }
5885 elem->priv = priv;
5886
5887 return 0;
5888}
5889
ba0e4d99 5890static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
079cd633 5891 const struct nlattr *attr, bool reset)
ba0e4d99
PNA		 5892{
5893 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5894 struct nft_set_elem elem;
5895 struct sk_buff *skb;
5896 uint32_t flags = 0;
ba0e4d99
PNA		 5897 int err;
5898
8cb08174
JB		 5899 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5900 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5901 if (err < 0)
5902 return err;
5903
ba0e4d99
PNA		 5904 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5905 if (err < 0)
5906 return err;
5907
aaa31047
PNA		 5908 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5909 return -EINVAL;
5910
5911 if (nla[NFTA_SET_ELEM_KEY]) {
5912 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5913 nla[NFTA_SET_ELEM_KEY]);
5914 if (err < 0)
5915 return err;
5916 }
ba0e4d99 5917
7b225d0b
PNA		 5918 if (nla[NFTA_SET_ELEM_KEY_END]) {
5919 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5920 nla[NFTA_SET_ELEM_KEY_END]);
5921 if (err < 0)
5922 return err;
5923 }
5924
aaa31047
PNA		 5925 err = nft_setelem_get(ctx, set, &elem, flags);
5926 if (err < 0)
5927 return err;
ba0e4d99
PNA		 5928
5929 err = -ENOMEM;
d9adf22a 5930 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 5931 if (skb == NULL)
ee921183 5932 return err;
ba0e4d99
PNA		 5933
5934 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
079cd633
PS		 5935 NFT_MSG_NEWSETELEM, 0, set, &elem,
5936 reset);
ba0e4d99 5937 if (err < 0)
ee921183 5938 goto err_fill_setelem;
ba0e4d99 5939
ee921183 5940 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 5941
ee921183 5942err_fill_setelem:
ba0e4d99 5943 kfree_skb(skb);
ee921183 5944 return err;
ba0e4d99
PNA		 5945}
5946
d9adf22a 5947/* called with rcu_read_lock held */
797d4980
PNA		 5948static int nf_tables_getsetelem(struct sk_buff *skb,
5949 const struct nfnl_info *info,
5950 const struct nlattr * const nla[])
ba0e4d99 5951{
797d4980
PNA		 5952 struct netlink_ext_ack *extack = info->extack;
5953 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 5954 u8 family = info->nfmsg->nfgen_family;
797d4980 5955 struct net *net = info->net;
e2b750d7 5956 struct nft_table *table;
ba0e4d99
PNA		 5957 struct nft_set *set;
5958 struct nlattr *attr;
5959 struct nft_ctx ctx;
079cd633 5960 bool reset = false;
ba0e4d99
PNA		 5961 int rem, err = 0;
5962
e2b750d7 5963 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
92f3e96d 5964 genmask, 0);
e2b750d7
PNA		 5965 if (IS_ERR(table)) {
5966 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5967 return PTR_ERR(table);
5968 }
ba0e4d99 5969
e2b750d7 5970 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
ba0e4d99
PNA		 5971 if (IS_ERR(set))
5972 return PTR_ERR(set);
5973
e2b750d7
PNA		 5974 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5975
797d4980 5976 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 5977 struct netlink_dump_control c = {
90fd131a 5978 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 5979 .dump = nf_tables_dump_set,
5980 .done = nf_tables_dump_set_done,
d9adf22a 5981 .module = THIS_MODULE,
ba0e4d99 5982 };
90fd131a
FW		 5983 struct nft_set_dump_ctx dump_ctx = {
5984 .set = set,
5985 .ctx = ctx,
5986 };
ba0e4d99 5987
90fd131a 5988 c.data = &dump_ctx;
797d4980 5989 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 5990 }
5991
5992 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5993 return -EINVAL;
5994
079cd633
PS		 5995 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETSETELEM_RESET)
5996 reset = true;
5997
ba0e4d99 5998 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
079cd633 5999 err = nft_get_set_elem(&ctx, set, attr, reset);
b53c1166
PNA		 6000 if (err < 0) {
6001 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 6002 break;
b53c1166 6003 }
ba0e4d99
PNA		 6004 }
6005
6006 return err;
6007}
6008
25e94a99
PNA		 6009static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
6010 const struct nft_set *set,
6011 const struct nft_set_elem *elem,
6fb721cf 6012 int event)
d60ce62f 6013{
0854db2a 6014 struct nftables_pernet *nft_net;
128ad332
PNA		 6015 struct net *net = ctx->net;
6016 u32 portid = ctx->portid;
d60ce62f 6017 struct sk_buff *skb;
6fb721cf 6018 u16 flags = 0;
d60ce62f
AB		 6019 int err;
6020
128ad332 6021 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 6022 return;
d60ce62f 6023
d60ce62f
AB		 6024 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6025 if (skb == NULL)
6026 goto err;
6027
6fb721cf
PNA		 6028 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
6029 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
6030
d60ce62f 6031 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
079cd633 6032 set, elem, false);
d60ce62f
AB		 6033 if (err < 0) {
6034 kfree_skb(skb);
6035 goto err;
6036 }
6037
d59d2f82 6038 nft_net = nft_pernet(net);
0854db2a 6039 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 6040 return;
d60ce62f 6041err:
25e94a99 6042 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 6043}
6044
60319eb1
PNA		 6045static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
6046 int msg_type,
6047 struct nft_set *set)
6048{
6049 struct nft_trans *trans;
6050
6051 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
6052 if (trans == NULL)
6053 return NULL;
6054
6055 nft_trans_elem_set(trans) = set;
6056 return trans;
6057}
6058
a7fc9368
PNA		 6059struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
6060 const struct nft_set *set,
6061 const struct nlattr *attr)
6062{
6063 struct nft_expr *expr;
6064 int err;
6065
6066 expr = nft_expr_init(ctx, attr);
6067 if (IS_ERR(expr))
6068 return expr;
6069
6070 err = -EOPNOTSUPP;
a7fc9368
PNA		 6071 if (expr->ops->type->flags & NFT_EXPR_GC) {
6072 if (set->flags & NFT_SET_TIMEOUT)
6073 goto err_set_elem_expr;
6074 if (!set->ops->gc_init)
6075 goto err_set_elem_expr;
6076 set->ops->gc_init(set);
6077 }
6078
6079 return expr;
6080
6081err_set_elem_expr:
6082 nft_expr_destroy(ctx, expr);
6083 return ERR_PTR(err);
6084}
6085
34aae2c2
PNA		 6086static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
6087{
6088 len += nft_set_ext_types[id].len;
6089 if (len > tmpl->ext_len[id] ||
6090 len > U8_MAX)
6091 return -1;
6092
6093 return 0;
6094}
6095
6096static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
6097 void *to, const void *from, u32 len)
6098{
6099 if (nft_set_ext_check(tmpl, id, len) < 0)
6100 return -1;
6101
6102 memcpy(to, from, len);
6103
6104 return 0;
6105}
6106
22fe54d5
PM		 6107void *nft_set_elem_init(const struct nft_set *set,
6108 const struct nft_set_ext_tmpl *tmpl,
7b225d0b
PNA		 6109 const u32 *key, const u32 *key_end,
6110 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 6111{
6112 struct nft_set_ext *ext;
6113 void *elem;
6114
6115 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
6116 if (elem == NULL)
34aae2c2 6117 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 6118
6119 ext = nft_set_elem_ext(set, elem);
6120 nft_set_ext_init(ext, tmpl);
6121
34aae2c2
PNA		 6122 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
6123 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
6124 nft_set_ext_key(ext), key, set->klen) < 0)
6125 goto err_ext_check;
6126
6127 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
6128 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
6129 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
6130 goto err_ext_check;
6131
6132 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6133 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
6134 nft_set_ext_data(ext), data, set->dlen) < 0)
6135 goto err_ext_check;
6136
79ebb5bb
LGL		 6137 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
6138 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
6139 if (expiration == 0)
6140 *nft_set_ext_expiration(ext) += timeout;
6141 }
c3e1b005
PM		 6142 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
6143 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 6144
6145 return elem;
34aae2c2
PNA		 6146
6147err_ext_check:
6148 kfree(elem);
6149
6150 return ERR_PTR(-EINVAL);
fe2811eb
PM		 6151}
6152
563125a7
PNA		 6153static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6154 struct nft_expr *expr)
475beb9c
PNA		 6155{
6156 if (expr->ops->destroy_clone) {
6157 expr->ops->destroy_clone(ctx, expr);
6158 module_put(expr->ops->type->owner);
6159 } else {
6160 nf_tables_expr_destroy(ctx, expr);
6161 }
6162}
6163
563125a7
PNA		 6164static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6165 struct nft_set_elem_expr *elem_expr)
6166{
6167 struct nft_expr *expr;
6168 u32 size;
6169
6170 nft_setelem_expr_foreach(expr, elem_expr, size)
6171 __nft_set_elem_expr_destroy(ctx, expr);
6172}
6173
628bd3e4 6174/* Drop references and destroy. Called from gc, dynset and abort path. */
61f9e292
LZ		 6175void nft_set_elem_destroy(const struct nft_set *set, void *elem,
6176 bool destroy_expr)
61edafbb
PM		 6177{
6178 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
3453c927
PNA		 6179 struct nft_ctx ctx = {
6180 .net = read_pnet(&set->net),
6181 .family = set->table->family,
6182 };
61edafbb 6183
59105446 6184 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 6185 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 6186 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 6187 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 6188 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
371ebcbb 6189
8aeff920 6190 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
1689f259 6191 nft_use_dec(&(*nft_set_ext_obj(ext))->use);
61edafbb
PM		 6192 kfree(elem);
6193}
6194EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
6195
628bd3e4
PNA		 6196/* Destroy element. References have been already dropped in the preparation
6197 * path via nft_setelem_data_deactivate().
59105446 6198 */
628bd3e4
PNA		 6199void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
6200 const struct nft_set *set, void *elem)
59105446
PNA		 6201{
6202 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
6203
563125a7 6204 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 6205 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
6206
59105446
PNA		 6207 kfree(elem);
6208}
6209
fca05d4d
PNA		 6210int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
6211 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 6212{
6213 struct nft_expr *expr;
6214 int err, i, k;
6215
6216 for (i = 0; i < set->num_exprs; i++) {
42193ffd 6217 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 6218 if (!expr)
6219 goto err_expr;
6220
6221 err = nft_expr_clone(expr, set->exprs[i]);
6222 if (err < 0) {
c485c35f 6223 kfree(expr);
8cfd9b0f
PNA		 6224 goto err_expr;
6225 }
6226 expr_array[i] = expr;
6227 }
6228
6229 return 0;
6230
6231err_expr:
161b838e
CIK		 6232 for (k = i - 1; k >= 0; k--)
6233 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 6234
6235 return -ENOMEM;
6236}
6237
4d8f9065 6238static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 6239 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 6240 const struct nft_set_ext *ext,
6241 struct nft_expr *expr_array[],
6242 u32 num_exprs)
563125a7
PNA		 6243{
6244 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 6245 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 6246 struct nft_expr *expr;
6247 int i, err;
6248
34aae2c2
PNA		 6249 if (num_exprs == 0)
6250 return 0;
6251
6252 for (i = 0; i < num_exprs; i++)
6253 len += expr_array[i]->ops->size;
6254
6255 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
6256 return -EINVAL;
6257
4d8f9065
PNA		 6258 for (i = 0; i < num_exprs; i++) {
6259 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
6260 err = nft_expr_clone(expr, expr_array[i]);
6261 if (err < 0)
6262 goto err_elem_expr_setup;
6263
6264 elem_expr->size += expr_array[i]->ops->size;
6265 nft_expr_destroy(ctx, expr_array[i]);
6266 expr_array[i] = NULL;
6267 }
6268
6269 return 0;
6270
6271err_elem_expr_setup:
6272 for (; i < num_exprs; i++) {
6273 nft_expr_destroy(ctx, expr_array[i]);
6274 expr_array[i] = NULL;
6275 }
563125a7 6276
4d8f9065 6277 return -ENOMEM;
563125a7
PNA		 6278}
6279
aaa31047
PNA		 6280struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
6281 const struct nft_set *set)
6282{
6283 struct nft_set_elem_catchall *catchall;
6284 u8 genmask = nft_genmask_cur(net);
6285 struct nft_set_ext *ext;
6286
6287 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6288 ext = nft_set_elem_ext(set, catchall->elem);
6289 if (nft_set_elem_active(ext, genmask) &&
5f68718b
PNA		 6290 !nft_set_elem_expired(ext) &&
6291 !nft_set_elem_is_dead(ext))
aaa31047
PNA		 6292 return ext;
6293 }
6294
6295 return NULL;
6296}
6297EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
6298
aaa31047
PNA		 6299static int nft_setelem_catchall_insert(const struct net *net,
6300 struct nft_set *set,
6301 const struct nft_set_elem *elem,
6302 struct nft_set_ext **pext)
6303{
6304 struct nft_set_elem_catchall *catchall;
6305 u8 genmask = nft_genmask_next(net);
6306 struct nft_set_ext *ext;
6307
6308 list_for_each_entry(catchall, &set->catchall_list, list) {
6309 ext = nft_set_elem_ext(set, catchall->elem);
6310 if (nft_set_elem_active(ext, genmask)) {
6311 *pext = ext;
6312 return -EEXIST;
6313 }
6314 }
6315
6316 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
6317 if (!catchall)
6318 return -ENOMEM;
6319
6320 catchall->elem = elem->priv;
6321 list_add_tail_rcu(&catchall->list, &set->catchall_list);
6322
6323 return 0;
6324}
6325
6326static int nft_setelem_insert(const struct net *net,
6327 struct nft_set *set,
6328 const struct nft_set_elem *elem,
6329 struct nft_set_ext **ext, unsigned int flags)
6330{
6331 int ret;
6332
6333 if (flags & NFT_SET_ELEM_CATCHALL)
6334 ret = nft_setelem_catchall_insert(net, set, elem, ext);
6335 else
6336 ret = set->ops->insert(net, set, elem, ext);
6337
6338 return ret;
6339}
6340
6341static bool nft_setelem_is_catchall(const struct nft_set *set,
6342 const struct nft_set_elem *elem)
6343{
6344 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6345
6346 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
6347 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
6348 return true;
6349
6350 return false;
6351}
6352
6353static void nft_setelem_activate(struct net *net, struct nft_set *set,
6354 struct nft_set_elem *elem)
6355{
6356 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6357
6358 if (nft_setelem_is_catchall(set, elem)) {
6359 nft_set_elem_change_active(net, set, ext);
aaa31047
PNA		 6360 } else {
6361 set->ops->activate(net, set, elem);
6362 }
6363}
6364
6365static int nft_setelem_catchall_deactivate(const struct net *net,
6366 struct nft_set *set,
6367 struct nft_set_elem *elem)
6368{
6369 struct nft_set_elem_catchall *catchall;
6370 struct nft_set_ext *ext;
6371
6372 list_for_each_entry(catchall, &set->catchall_list, list) {
6373 ext = nft_set_elem_ext(set, catchall->elem);
f6c383b8 6374 if (!nft_is_active(net, ext))
aaa31047
PNA		 6375 continue;
6376
6377 kfree(elem->priv);
6378 elem->priv = catchall->elem;
6379 nft_set_elem_change_active(net, set, ext);
6380 return 0;
6381 }
6382
6383 return -ENOENT;
6384}
6385
6386static int __nft_setelem_deactivate(const struct net *net,
6387 struct nft_set *set,
6388 struct nft_set_elem *elem)
6389{
6390 void *priv;
6391
6392 priv = set->ops->deactivate(net, set, elem);
6393 if (!priv)
6394 return -ENOENT;
6395
6396 kfree(elem->priv);
6397 elem->priv = priv;
6398 set->ndeact++;
6399
6400 return 0;
6401}
6402
6403static int nft_setelem_deactivate(const struct net *net,
6404 struct nft_set *set,
6405 struct nft_set_elem *elem, u32 flags)
6406{
6407 int ret;
6408
6409 if (flags & NFT_SET_ELEM_CATCHALL)
6410 ret = nft_setelem_catchall_deactivate(net, set, elem);
6411 else
6412 ret = __nft_setelem_deactivate(net, set, elem);
6413
6414 return ret;
6415}
6416
6417static void nft_setelem_catchall_remove(const struct net *net,
6418 const struct nft_set *set,
6419 const struct nft_set_elem *elem)
6420{
6421 struct nft_set_elem_catchall *catchall, *next;
6422
6423 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6424 if (catchall->elem == elem->priv) {
6425 list_del_rcu(&catchall->list);
ae089831 6426 kfree_rcu(catchall, rcu);
aaa31047
PNA		 6427 break;
6428 }
6429 }
6430}
6431
6432static void nft_setelem_remove(const struct net *net,
6433 const struct nft_set *set,
6434 const struct nft_set_elem *elem)
6435{
6436 if (nft_setelem_is_catchall(set, elem))
6437 nft_setelem_catchall_remove(net, set, elem);
6438 else
6439 set->ops->remove(net, set, elem);
6440}
6441
88cccd90
PNA		 6442static bool nft_setelem_valid_key_end(const struct nft_set *set,
6443 struct nlattr **nla, u32 flags)
6444{
6445 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
6446 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
6447 if (flags & NFT_SET_ELEM_INTERVAL_END)
6448 return false;
96df8360
PNA		 6449
6450 if (nla[NFTA_SET_ELEM_KEY_END] &&
6451 flags & NFT_SET_ELEM_CATCHALL)
88cccd90
PNA		 6452 return false;
6453 } else {
6454 if (nla[NFTA_SET_ELEM_KEY_END])
6455 return false;
6456 }
6457
6458 return true;
6459}
6460
60319eb1 6461static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 6462 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 6463{
8cfd9b0f 6464 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 6465 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 6466 u8 genmask = nft_genmask_next(ctx->net);
664899e8 6467 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 6468 struct nft_set_ext_tmpl tmpl;
c016c7e4 6469 struct nft_set_ext *ext, *ext2;
20a69341
PM		 6470 struct nft_set_elem elem;
6471 struct nft_set_binding *binding;
8aeff920 6472 struct nft_object *obj = NULL;
68e942e8 6473 struct nft_userdata *udata;
20a1452c 6474 struct nft_data_desc desc;
20a69341 6475 enum nft_registers dreg;
60319eb1 6476 struct nft_trans *trans;
c3e1b005 6477 u64 timeout;
79ebb5bb 6478 u64 expiration;
8cfd9b0f 6479 int err, i;
68e942e8 6480 u8 ulen;
20a69341 6481
8cb08174
JB		 6482 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6483 nft_set_elem_policy, NULL);
20a69341
PM		 6484 if (err < 0)
6485 return err;
6486
fe2811eb
PM		 6487 nft_set_ext_prepare(&tmpl);
6488
0e9091d6
PNA		 6489 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6490 if (err < 0)
6491 return err;
aaa31047 6492
d4eb7e39
PNA		 6493 if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
6494 (!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
aaa31047
PNA		 6495 return -EINVAL;
6496
c39ba4de
PNA		 6497 if (flags != 0) {
6498 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6499 if (err < 0)
6500 return err;
6501 }
20a69341
PM		 6502
6503 if (set->flags & NFT_SET_MAP) {
6504 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 6505 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 6506 return -EINVAL;
6507 } else {
6508 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6509 return -EINVAL;
6510 }
6511
5a2f3dc3
PNA		 6512 if (set->flags & NFT_SET_OBJECT) {
6513 if (!nla[NFTA_SET_ELEM_OBJREF] &&
6514 !(flags & NFT_SET_ELEM_INTERVAL_END))
6515 return -EINVAL;
6516 } else {
6517 if (nla[NFTA_SET_ELEM_OBJREF])
6518 return -EINVAL;
6519 }
6520
88cccd90
PNA		 6521 if (!nft_setelem_valid_key_end(set, nla, flags))
6522 return -EINVAL;
6523
bffc124b
PNA		 6524 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
6525 (nla[NFTA_SET_ELEM_DATA] ||
6526 nla[NFTA_SET_ELEM_OBJREF] ||
6527 nla[NFTA_SET_ELEM_TIMEOUT] ||
6528 nla[NFTA_SET_ELEM_EXPIRATION] ||
6529 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 6530 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 6531 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 6532 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 6533 return -EINVAL;
6534
c3e1b005
PM		 6535 timeout = 0;
6536 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6537 if (!(set->flags & NFT_SET_TIMEOUT))
6538 return -EINVAL;
8e1102d5
FW		 6539 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6540 &timeout);
6541 if (err)
6542 return err;
33c7aba0
PNA		 6543 } else if (set->flags & NFT_SET_TIMEOUT &&
6544 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
123b9961 6545 timeout = READ_ONCE(set->timeout);
c3e1b005
PM		 6546 }
6547
79ebb5bb
LGL		 6548 expiration = 0;
6549 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6550 if (!(set->flags & NFT_SET_TIMEOUT))
6551 return -EINVAL;
6552 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6553 &expiration);
6554 if (err)
6555 return err;
6556 }
6557
8cfd9b0f
PNA		 6558 if (nla[NFTA_SET_ELEM_EXPR]) {
6559 struct nft_expr *expr;
6560
664899e8 6561 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 6562 return -EOPNOTSUPP;
6563
40944452
PNA		 6564 expr = nft_set_elem_expr_alloc(ctx, set,
6565 nla[NFTA_SET_ELEM_EXPR]);
6566 if (IS_ERR(expr))
6567 return PTR_ERR(expr);
65038428 6568
8cfd9b0f 6569 expr_array[0] = expr;
664899e8 6570 num_exprs = 1;
65038428 6571
664899e8 6572 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 6573 err = -EOPNOTSUPP;
65038428 6574 goto err_set_elem_expr;
8cfd9b0f 6575 }
48b0ae04
PNA		 6576 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6577 struct nft_expr *expr;
6578 struct nlattr *tmp;
6579 int left;
65038428 6580
48b0ae04
PNA		 6581 i = 0;
6582 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 6583 if (i == NFT_SET_EXPR_MAX ||
6584 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 6585 err = -E2BIG;
6586 goto err_set_elem_expr;
6587 }
6588 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6589 err = -EINVAL;
6590 goto err_set_elem_expr;
6591 }
6592 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6593 if (IS_ERR(expr)) {
6594 err = PTR_ERR(expr);
6595 goto err_set_elem_expr;
6596 }
6597 expr_array[i] = expr;
664899e8 6598 num_exprs++;
48b0ae04 6599
664899e8 6600 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6601 err = -EOPNOTSUPP;
6602 goto err_set_elem_expr;
6603 }
6604 i++;
6605 }
664899e8 6606 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6607 err = -EOPNOTSUPP;
65038428 6608 goto err_set_elem_expr;
48b0ae04 6609 }
33c7aba0
PNA		 6610 } else if (set->num_exprs > 0 &&
6611 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
8cfd9b0f
PNA		 6612 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6613 if (err < 0)
6614 goto err_set_elem_expr_clone;
664899e8
PNA		 6615
6616 num_exprs = set->num_exprs;
40944452
PNA		 6617 }
6618
aaa31047
PNA		 6619 if (nla[NFTA_SET_ELEM_KEY]) {
6620 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6621 nla[NFTA_SET_ELEM_KEY]);
6622 if (err < 0)
6623 goto err_set_elem_expr;
20a69341 6624
c39ba4de
PNA		 6625 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6626 if (err < 0)
6627 goto err_parse_key;
aaa31047 6628 }
7b225d0b
PNA		 6629
6630 if (nla[NFTA_SET_ELEM_KEY_END]) {
6631 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6632 nla[NFTA_SET_ELEM_KEY_END]);
6633 if (err < 0)
6634 goto err_parse_key;
6635
c39ba4de
PNA		 6636 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6637 if (err < 0)
6638 goto err_parse_key_end;
7b225d0b
PNA		 6639 }
6640
c3e1b005 6641 if (timeout > 0) {
c39ba4de
PNA		 6642 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6643 if (err < 0)
6644 goto err_parse_key_end;
6645
123b9961 6646 if (timeout != READ_ONCE(set->timeout)) {
c39ba4de
PNA		 6647 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6648 if (err < 0)
6649 goto err_parse_key_end;
6650 }
c3e1b005 6651 }
fe2811eb 6652
664899e8
PNA		 6653 if (num_exprs) {
6654 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6655 size += expr_array[i]->ops->size;
6656
c39ba4de
PNA		 6657 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6658 sizeof(struct nft_set_elem_expr) + size);
6659 if (err < 0)
6660 goto err_parse_key_end;
563125a7 6661 }
40944452 6662
8aeff920 6663 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6664 obj = nft_obj_lookup(ctx->net, ctx->table,
6665 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6666 set->objtype, genmask);
8aeff920
PNA		 6667 if (IS_ERR(obj)) {
6668 err = PTR_ERR(obj);
1689f259 6669 obj = NULL;
7b225d0b 6670 goto err_parse_key_end;
8aeff920 6671 }
1689f259
PNA		 6672
6673 if (!nft_use_inc(&obj->use)) {
6674 err = -EMFILE;
6675 obj = NULL;
6676 goto err_parse_key_end;
6677 }
6678
c39ba4de
PNA		 6679 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6680 if (err < 0)
6681 goto err_parse_key_end;
8aeff920
PNA		 6682 }
6683
20a69341 6684 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6685 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6686 nla[NFTA_SET_ELEM_DATA]);
20a69341 6687 if (err < 0)
7b225d0b 6688 goto err_parse_key_end;
20a69341 6689
20a69341
PM		 6690 dreg = nft_type_to_reg(set->dtype);
6691 list_for_each_entry(binding, &set->bindings, list) {
6692 struct nft_ctx bind_ctx = {
58c78e10 6693 .net = ctx->net,
36596dad 6694 .family = ctx->family,
20a69341 6695 .table = ctx->table,
7c95f6d8 6696 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6697 };
6698
11113e19
PM		 6699 if (!(binding->flags & NFT_SET_MAP))
6700 continue;
6701
1ec10212 6702 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6703 &elem.data.val,
20a1452c 6704 desc.type, desc.len);
20a69341 6705 if (err < 0)
7b225d0b 6706 goto err_parse_data;
a654de8f 6707
20a1452c 6708 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6709 (elem.data.val.verdict.code == NFT_GOTO ||
6710 elem.data.val.verdict.code == NFT_JUMP))
00c320f9 6711 nft_validate_state_update(ctx->table,
a654de8f 6712 NFT_VALIDATE_NEED);
20a69341 6713 }
fe2811eb 6714
c39ba4de
PNA		 6715 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6716 if (err < 0)
6717 goto err_parse_data;
20a69341
PM		 6718 }
6719
68e942e8
PM		 6720 /* The full maximum length of userdata can exceed the maximum
6721 * offset value (U8_MAX) for following extensions, therefor it
6722 * must be the last extension added.
6723 */
6724 ulen = 0;
6725 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6726 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6727 if (ulen > 0) {
6728 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6729 ulen);
6730 if (err < 0)
6731 goto err_parse_data;
6732 }
68e942e8
PM		 6733 }
6734
7b225d0b 6735 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6736 elem.key_end.val.data, elem.data.val.data,
33758c89 6737 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6738 if (IS_ERR(elem.priv)) {
6739 err = PTR_ERR(elem.priv);
7b225d0b 6740 goto err_parse_data;
34aae2c2 6741 }
fe2811eb
PM		 6742
6743 ext = nft_set_elem_ext(set, elem.priv);
6744 if (flags)
6745 *nft_set_ext_flags(ext) = flags;
34aae2c2 6746
1689f259 6747 if (obj)
d6b47866 6748 *nft_set_ext_obj(ext) = obj;
1689f259 6749
68e942e8 6750 if (ulen > 0) {
34aae2c2
PNA		 6751 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6752 err = -EINVAL;
d6b47866 6753 goto err_elem_free;
34aae2c2 6754 }
68e942e8
PM		 6755 udata = nft_set_ext_userdata(ext);
6756 udata->len = ulen - 1;
6757 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6758 }
34aae2c2 6759 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6760 if (err < 0)
34aae2c2 6761 goto err_elem_free;
fe2811eb 6762
60319eb1 6763 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6764 if (trans == NULL) {
6765 err = -ENOMEM;
34aae2c2 6766 goto err_elem_free;
4d8f9065 6767 }
60319eb1 6768
a2dd0233 6769 ext->genmask = nft_genmask_cur(ctx->net);
aaa31047
PNA		 6770
6771 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
c016c7e4
PNA		 6772 if (err) {
6773 if (err == -EEXIST) {
9744a6fc
PNA		 6774 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6775 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6776 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6777 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6778 goto err_element_clash;
8aeff920
PNA		 6779 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6780 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6781 memcmp(nft_set_ext_data(ext),
6782 nft_set_ext_data(ext2), set->dlen) != 0) ||
6783 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6784 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6785 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6786 goto err_element_clash;
c016c7e4
PNA		 6787 else if (!(nlmsg_flags & NLM_F_EXCL))
6788 err = 0;
8c2d45b2
PNA		 6789 } else if (err == -ENOTEMPTY) {
6790 /* ENOTEMPTY reports overlapping between this element
6791 * and an existing one.
6792 */
6793 err = -EEXIST;
c016c7e4 6794 }
7b225d0b 6795 goto err_element_clash;
c016c7e4 6796 }
20a69341 6797
d4b7f29e
FW		 6798 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
6799 unsigned int max = set->size ? set->size + set->ndeact : UINT_MAX;
6800
6801 if (!atomic_add_unless(&set->nelems, 1, max)) {
6802 err = -ENFILE;
6803 goto err_set_full;
6804 }
35d0ac90
PNA		 6805 }
6806
60319eb1 6807 nft_trans_elem(trans) = elem;
0854db2a 6808 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6809 return 0;
6810
7b225d0b 6811err_set_full:
aaa31047 6812 nft_setelem_remove(ctx->net, set, &elem);
7b225d0b 6813err_element_clash:
60319eb1 6814 kfree(trans);
34aae2c2 6815err_elem_free:
b389139f 6816 nf_tables_set_elem_destroy(ctx, set, elem.priv);
7b225d0b 6817err_parse_data:
20a69341 6818 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6819 nft_data_release(&elem.data.val, desc.type);
7b225d0b 6820err_parse_key_end:
1689f259
PNA		 6821 if (obj)
6822 nft_use_dec_restore(&obj->use);
6823
7b225d0b
PNA		 6824 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6825err_parse_key:
20a1452c 6826 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6827err_set_elem_expr:
664899e8 6828 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6829 nft_expr_destroy(ctx, expr_array[i]);
6830err_set_elem_expr_clone:
20a69341
PM		 6831 return err;
6832}
6833
7dab8ee3
PNA		 6834static int nf_tables_newsetelem(struct sk_buff *skb,
6835 const struct nfnl_info *info,
6836 const struct nlattr * const nla[])
20a69341 6837{
7dab8ee3
PNA		 6838 struct netlink_ext_ack *extack = info->extack;
6839 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6840 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6841 struct net *net = info->net;
20a69341 6842 const struct nlattr *attr;
e2b750d7 6843 struct nft_table *table;
20a69341
PM		 6844 struct nft_set *set;
6845 struct nft_ctx ctx;
a654de8f 6846 int rem, err;
20a69341 6847
7d5570ca
PNA		 6848 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6849 return -EINVAL;
6850
e2b750d7
PNA		 6851 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6852 genmask, NETLINK_CB(skb).portid);
6853 if (IS_ERR(table)) {
6854 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6855 return PTR_ERR(table);
6856 }
20a69341 6857
e2b750d7 6858 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17
PNA		 6859 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6860 if (IS_ERR(set))
6861 return PTR_ERR(set);
958bee14 6862
c88c535b
PNA		 6863 if (!list_empty(&set->bindings) &&
6864 (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS)))
20a69341
PM		 6865 return -EBUSY;
6866
e2b750d7
PNA		 6867 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6868
20a69341 6869 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6870 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6871 if (err < 0) {
6872 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6873 return err;
b53c1166 6874 }
20a69341 6875 }
a654de8f 6876
00c320f9 6877 if (table->validate_state == NFT_VALIDATE_DO)
e2b750d7 6878 return nft_table_validate(net, table);
a654de8f
PNA		 6879
6880 return 0;
20a69341
PM		 6881}
6882
59105446
PNA		 6883/**
6884 * nft_data_hold - hold a nft_data item
6885 *
6886 * @data: struct nft_data to release
6887 * @type: type of data
6888 *
6889 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6890 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6891 * NFT_GOTO verdicts. This function must be called on active data objects
6892 * from the second phase of the commit protocol.
6893 */
bb7b40ae 6894void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 6895{
d0e2c7de 6896 struct nft_chain *chain;
d0e2c7de 6897
59105446
PNA		 6898 if (type == NFT_DATA_VERDICT) {
6899 switch (data->verdict.code) {
6900 case NFT_JUMP:
6901 case NFT_GOTO:
d0e2c7de 6902 chain = data->verdict.chain;
1689f259 6903 nft_use_inc_restore(&chain->use);
59105446
PNA		 6904 break;
6905 }
6906 }
6907}
6908
f8bb7889
PNA		 6909static void nft_setelem_data_activate(const struct net *net,
6910 const struct nft_set *set,
6911 struct nft_set_elem *elem)
59105446
PNA		 6912{
6913 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6914
6915 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6916 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6917 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
1689f259 6918 nft_use_inc_restore(&(*nft_set_ext_obj(ext))->use);
59105446
PNA		 6919}
6920
5f68718b
PNA		 6921void nft_setelem_data_deactivate(const struct net *net,
6922 const struct nft_set *set,
6923 struct nft_set_elem *elem)
59105446
PNA		 6924{
6925 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6926
6927 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6928 nft_data_release(nft_set_ext_data(ext), set->dtype);
6929 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
1689f259 6930 nft_use_dec(&(*nft_set_ext_obj(ext))->use);
59105446
PNA		 6931}
6932
60319eb1 6933static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 6934 const struct nlattr *attr)
6935{
6936 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 6937 struct nft_set_ext_tmpl tmpl;
20a69341 6938 struct nft_set_elem elem;
3971ca14 6939 struct nft_set_ext *ext;
60319eb1 6940 struct nft_trans *trans;
3971ca14 6941 u32 flags = 0;
20a69341
PM		 6942 int err;
6943
8cb08174
JB		 6944 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6945 nft_set_elem_policy, NULL);
20a69341 6946 if (err < 0)
20a1452c 6947 return err;
20a69341 6948
aaa31047
PNA		 6949 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6950 if (err < 0)
6951 return err;
6952
6953 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 6954 return -EINVAL;
20a69341 6955
88cccd90
PNA		 6956 if (!nft_setelem_valid_key_end(set, nla, flags))
6957 return -EINVAL;
6958
3971ca14
PNA		 6959 nft_set_ext_prepare(&tmpl);
6960
c39ba4de
PNA		 6961 if (flags != 0) {
6962 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6963 if (err < 0)
6964 return err;
6965 }
3971ca14 6966
aaa31047
PNA		 6967 if (nla[NFTA_SET_ELEM_KEY]) {
6968 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6969 nla[NFTA_SET_ELEM_KEY]);
6970 if (err < 0)
6971 return err;
20a69341 6972
c39ba4de
PNA		 6973 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6974 if (err < 0)
6975 goto fail_elem;
aaa31047 6976 }
3971ca14 6977
7b225d0b
PNA		 6978 if (nla[NFTA_SET_ELEM_KEY_END]) {
6979 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6980 nla[NFTA_SET_ELEM_KEY_END]);
6981 if (err < 0)
c39ba4de 6982 goto fail_elem;
7b225d0b 6983
c39ba4de
PNA		 6984 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6985 if (err < 0)
6986 goto fail_elem_key_end;
7b225d0b
PNA		 6987 }
6988
3971ca14 6989 err = -ENOMEM;
7b225d0b
PNA		 6990 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6991 elem.key_end.val.data, NULL, 0, 0,
33758c89 6992 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6993 if (IS_ERR(elem.priv)) {
6994 err = PTR_ERR(elem.priv);
c39ba4de 6995 goto fail_elem_key_end;
34aae2c2 6996 }
3971ca14
PNA		 6997
6998 ext = nft_set_elem_ext(set, elem.priv);
6999 if (flags)
7000 *nft_set_ext_flags(ext) = flags;
7001
60319eb1 7002 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 7003 if (trans == NULL)
7004 goto fail_trans;
20a69341 7005
aaa31047
PNA		 7006 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
7007 if (err < 0)
20a1452c 7008 goto fail_ops;
cc02e457 7009
f8bb7889 7010 nft_setelem_data_deactivate(ctx->net, set, &elem);
59105446 7011
60319eb1 7012 nft_trans_elem(trans) = elem;
0854db2a 7013 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 7014 return 0;
cc02e457 7015
20a1452c 7016fail_ops:
cc02e457 7017 kfree(trans);
20a1452c 7018fail_trans:
3971ca14 7019 kfree(elem.priv);
c39ba4de
PNA		 7020fail_elem_key_end:
7021 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 7022fail_elem:
7023 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 7024 return err;
7025}
7026
e6ba7cb6
PNA		 7027static int nft_setelem_flush(const struct nft_ctx *ctx,
7028 struct nft_set *set,
7029 const struct nft_set_iter *iter,
7030 struct nft_set_elem *elem)
8411b644
PNA		 7031{
7032 struct nft_trans *trans;
7033 int err;
7034
7035 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
7036 sizeof(struct nft_trans_elem), GFP_ATOMIC);
7037 if (!trans)
7038 return -ENOMEM;
7039
1ba1c414 7040 if (!set->ops->flush(ctx->net, set, elem->priv)) {
8411b644
PNA		 7041 err = -ENOENT;
7042 goto err1;
7043 }
b2c11e4b 7044 set->ndeact++;
8411b644 7045
f8bb7889 7046 nft_setelem_data_deactivate(ctx->net, set, elem);
de70185d
PNA		 7047 nft_trans_elem_set(trans) = set;
7048 nft_trans_elem(trans) = *elem;
0854db2a 7049 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 7050
7051 return 0;
7052err1:
7053 kfree(trans);
7054 return err;
7055}
7056
aaa31047
PNA		 7057static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
7058 struct nft_set *set,
7059 struct nft_set_elem *elem)
7060{
7061 struct nft_trans *trans;
7062
7063 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
7064 sizeof(struct nft_trans_elem), GFP_KERNEL);
7065 if (!trans)
7066 return -ENOMEM;
7067
7068 nft_setelem_data_deactivate(ctx->net, set, elem);
7069 nft_trans_elem_set(trans) = set;
7070 nft_trans_elem(trans) = *elem;
7071 nft_trans_commit_list_add_tail(ctx->net, trans);
7072
7073 return 0;
7074}
7075
7076static int nft_set_catchall_flush(const struct nft_ctx *ctx,
7077 struct nft_set *set)
7078{
7079 u8 genmask = nft_genmask_next(ctx->net);
7080 struct nft_set_elem_catchall *catchall;
7081 struct nft_set_elem elem;
7082 struct nft_set_ext *ext;
7083 int ret = 0;
7084
7085 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
7086 ext = nft_set_elem_ext(set, catchall->elem);
f6c383b8 7087 if (!nft_set_elem_active(ext, genmask))
aaa31047
PNA		 7088 continue;
7089
7090 elem.priv = catchall->elem;
7091 ret = __nft_set_catchall_flush(ctx, set, &elem);
7092 if (ret < 0)
7093 break;
90e5b346 7094 nft_set_elem_change_active(ctx->net, set, ext);
aaa31047
PNA		 7095 }
7096
7097 return ret;
7098}
7099
e6ba7cb6
PNA		 7100static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
7101{
7102 struct nft_set_iter iter = {
7103 .genmask = genmask,
7104 .fn = nft_setelem_flush,
7105 };
7106
7107 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 7108 if (!iter.err)
7109 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 7110
7111 return iter.err;
7112}
7113
7dab8ee3
PNA		 7114static int nf_tables_delsetelem(struct sk_buff *skb,
7115 const struct nfnl_info *info,
7116 const struct nlattr * const nla[])
20a69341 7117{
7dab8ee3
PNA		 7118 struct netlink_ext_ack *extack = info->extack;
7119 u8 genmask = nft_genmask_next(info->net);
e2b750d7 7120 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7121 struct net *net = info->net;
20a69341 7122 const struct nlattr *attr;
e2b750d7 7123 struct nft_table *table;
20a69341
PM		 7124 struct nft_set *set;
7125 struct nft_ctx ctx;
60319eb1 7126 int rem, err = 0;
20a69341 7127
e2b750d7
PNA		 7128 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
7129 genmask, NETLINK_CB(skb).portid);
7130 if (IS_ERR(table)) {
7131 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
7132 return PTR_ERR(table);
7133 }
20a69341 7134
e2b750d7 7135 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
20a69341
PM		 7136 if (IS_ERR(set))
7137 return PTR_ERR(set);
c88c535b
PNA		 7138
7139 if (!list_empty(&set->bindings) &&
7140 (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS)))
20a69341
PM		 7141 return -EBUSY;
7142
e2b750d7
PNA		 7143 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7144
e6ba7cb6
PNA		 7145 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
7146 return nft_set_flush(&ctx, set, genmask);
8411b644 7147
20a69341
PM		 7148 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7149 err = nft_del_setelem(&ctx, set, attr);
f80a612d
FFM		 7150 if (err == -ENOENT &&
7151 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
7152 continue;
7153
b53c1166
PNA		 7154 if (err < 0) {
7155 NL_SET_BAD_ATTR(extack, attr);
60319eb1 7156 break;
b53c1166 7157 }
20a69341 7158 }
60319eb1 7159 return err;
20a69341
PM		 7160}
7161
e5009240
PNA		 7162/*
7163 * Stateful objects
7164 */
7165
7166/**
7167 * nft_register_obj- register nf_tables stateful object type
3db86c39 7168 * @obj_type: object type
e5009240
PNA		 7169 *
7170 * Registers the object type for use with nf_tables. Returns zero on
7171 * success or a negative errno code otherwise.
7172 */
7173int nft_register_obj(struct nft_object_type *obj_type)
7174{
7175 if (obj_type->type == NFT_OBJECT_UNSPEC)
7176 return -EINVAL;
7177
7178 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7179 list_add_rcu(&obj_type->list, &nf_tables_objects);
7180 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7181 return 0;
7182}
7183EXPORT_SYMBOL_GPL(nft_register_obj);
7184
7185/**
7186 * nft_unregister_obj - unregister nf_tables object type
3db86c39 7187 * @obj_type: object type
e5009240
PNA		 7188 *
7189 * Unregisters the object type for use with nf_tables.
7190 */
7191void nft_unregister_obj(struct nft_object_type *obj_type)
7192{
7193 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7194 list_del_rcu(&obj_type->list);
7195 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7196}
7197EXPORT_SYMBOL_GPL(nft_unregister_obj);
7198
4d44175a
FW		 7199struct nft_object *nft_obj_lookup(const struct net *net,
7200 const struct nft_table *table,
cac20fcd
PNA		 7201 const struct nlattr *nla, u32 objtype,
7202 u8 genmask)
e5009240 7203{
4d44175a
FW		 7204 struct nft_object_hash_key k = { .table = table };
7205 char search[NFT_OBJ_MAXNAMELEN];
7206 struct rhlist_head *tmp, *list;
e5009240
PNA		 7207 struct nft_object *obj;
7208
872f6903 7209 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 7210 k.name = search;
7211
7212 WARN_ON_ONCE(!rcu_read_lock_held() &&
7213 !lockdep_commit_lock_is_held(net));
7214
7215 rcu_read_lock();
7216 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
7217 if (!list)
7218 goto out;
7219
7220 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
7221 if (objtype == obj->ops->type->type &&
7222 nft_active_genmask(obj, genmask)) {
7223 rcu_read_unlock();
e5009240 7224 return obj;
4d44175a 7225 }
e5009240 7226 }
4d44175a
FW		 7227out:
7228 rcu_read_unlock();
e5009240
PNA		 7229 return ERR_PTR(-ENOENT);
7230}
cac20fcd 7231EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 7232
cac20fcd
PNA		 7233static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
7234 const struct nlattr *nla,
7235 u32 objtype, u8 genmask)
3ecbfd65
HS		 7236{
7237 struct nft_object *obj;
7238
7239 list_for_each_entry(obj, &table->objects, list) {
7240 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
7241 objtype == obj->ops->type->type &&
7242 nft_active_genmask(obj, genmask))
7243 return obj;
7244 }
7245 return ERR_PTR(-ENOENT);
7246}
7247
e5009240 7248static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 7249 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
7250 .len = NFT_TABLE_MAXNAMELEN - 1 },
7251 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
7252 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 7253 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
7254 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 7255 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 7256 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
7257 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 7258};
7259
84fba055
FW		 7260static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
7261 const struct nft_object_type *type,
e5009240
PNA		 7262 const struct nlattr *attr)
7263{
5b4c6e38 7264 struct nlattr **tb;
dfc46034 7265 const struct nft_object_ops *ops;
e5009240 7266 struct nft_object *obj;
5b4c6e38
GS		 7267 int err = -ENOMEM;
7268
7269 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
7270 if (!tb)
7271 goto err1;
e5009240
PNA		 7272
7273 if (attr) {
8cb08174
JB		 7274 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
7275 type->policy, NULL);
e5009240 7276 if (err < 0)
5b4c6e38 7277 goto err2;
e5009240
PNA		 7278 } else {
7279 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
7280 }
7281
dfc46034
PBG		 7282 if (type->select_ops) {
7283 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
7284 if (IS_ERR(ops)) {
7285 err = PTR_ERR(ops);
5b4c6e38 7286 goto err2;
dfc46034
PBG		 7287 }
7288 } else {
7289 ops = type->ops;
7290 }
7291
e5009240 7292 err = -ENOMEM;
33758c89 7293 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 7294 if (!obj)
7295 goto err2;
e5009240 7296
dfc46034 7297 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 7298 if (err < 0)
5b4c6e38 7299 goto err3;
e5009240 7300
dfc46034
PBG		 7301 obj->ops = ops;
7302
5b4c6e38 7303 kfree(tb);
e5009240 7304 return obj;
5b4c6e38 7305err3:
e5009240 7306 kfree(obj);
5b4c6e38
GS		 7307err2:
7308 kfree(tb);
e5009240
PNA		 7309err1:
7310 return ERR_PTR(err);
7311}
7312
7313static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 7314 struct nft_object *obj, bool reset)
e5009240
PNA		 7315{
7316 struct nlattr *nest;
7317
ae0be8de 7318 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 7319 if (!nest)
7320 goto nla_put_failure;
dfc46034 7321 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 7322 goto nla_put_failure;
7323 nla_nest_end(skb, nest);
7324 return 0;
7325
7326nla_put_failure:
7327 return -1;
7328}
7329
7330static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
7331{
7332 const struct nft_object_type *type;
7333
7334 list_for_each_entry(type, &nf_tables_objects, list) {
7335 if (objtype == type->type)
7336 return type;
7337 }
7338 return NULL;
7339}
7340
452238e8
FW		 7341static const struct nft_object_type *
7342nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 7343{
7344 const struct nft_object_type *type;
7345
7346 type = __nft_obj_type_get(objtype);
7347 if (type != NULL && try_module_get(type->owner))
7348 return type;
7349
f102d66b 7350 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 7351#ifdef CONFIG_MODULES
7352 if (type == NULL) {
eb014de4 7353 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 7354 return ERR_PTR(-EAGAIN);
7355 }
7356#endif
7357 return ERR_PTR(-ENOENT);
7358}
7359
d62d0ba9
FFM		 7360static int nf_tables_updobj(const struct nft_ctx *ctx,
7361 const struct nft_object_type *type,
7362 const struct nlattr *attr,
7363 struct nft_object *obj)
7364{
7365 struct nft_object *newobj;
7366 struct nft_trans *trans;
dad3bdee
FW		 7367 int err = -ENOMEM;
7368
7369 if (!try_module_get(type->owner))
7370 return -ENOENT;
d62d0ba9
FFM		 7371
7372 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
7373 sizeof(struct nft_trans_obj));
7374 if (!trans)
dad3bdee 7375 goto err_trans;
d62d0ba9
FFM		 7376
7377 newobj = nft_obj_init(ctx, type, attr);
7378 if (IS_ERR(newobj)) {
7379 err = PTR_ERR(newobj);
b74ae961 7380 goto err_free_trans;
d62d0ba9
FFM		 7381 }
7382
7383 nft_trans_obj(trans) = obj;
7384 nft_trans_obj_update(trans) = true;
7385 nft_trans_obj_newobj(trans) = newobj;
0854db2a 7386 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 7387
7388 return 0;
b74ae961
DC		 7389
7390err_free_trans:
d62d0ba9 7391 kfree(trans);
dad3bdee
FW		 7392err_trans:
7393 module_put(type->owner);
d62d0ba9
FFM		 7394 return err;
7395}
7396
7dab8ee3
PNA		 7397static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
7398 const struct nlattr * const nla[])
e5009240 7399{
7dab8ee3
PNA		 7400 struct netlink_ext_ack *extack = info->extack;
7401 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7402 u8 family = info->nfmsg->nfgen_family;
e5009240 7403 const struct nft_object_type *type;
7dab8ee3 7404 struct net *net = info->net;
e5009240
PNA		 7405 struct nft_table *table;
7406 struct nft_object *obj;
7407 struct nft_ctx ctx;
7408 u32 objtype;
7409 int err;
7410
7411 if (!nla[NFTA_OBJ_TYPE] ||
7412 !nla[NFTA_OBJ_NAME] ||
7413 !nla[NFTA_OBJ_DATA])
7414 return -EINVAL;
7415
6001a930
PNA		 7416 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7417 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7418 if (IS_ERR(table)) {
7419 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7420 return PTR_ERR(table);
36dd1bcc 7421 }
e5009240
PNA		 7422
7423 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7424 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 7425 if (IS_ERR(obj)) {
7426 err = PTR_ERR(obj);
36dd1bcc
PNA		 7427 if (err != -ENOENT) {
7428 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7429 return err;
36dd1bcc 7430 }
1a28ad74 7431 } else {
7dab8ee3 7432 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7433 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7434 return -EEXIST;
36dd1bcc 7435 }
7dab8ee3 7436 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 7437 return -EOPNOTSUPP;
7438
fd57d0cb 7439 type = __nft_obj_type_get(objtype);
dac7f50a
AT		 7440 if (WARN_ON_ONCE(!type))
7441 return -ENOENT;
7442
7dab8ee3 7443 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 7444
7445 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 7446 }
7447
7dab8ee3 7448 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 7449
1689f259
PNA		 7450 if (!nft_use_inc(&table->use))
7451 return -EMFILE;
7452
452238e8 7453 type = nft_obj_type_get(net, objtype);
1689f259
PNA		 7454 if (IS_ERR(type)) {
7455 err = PTR_ERR(type);
7456 goto err_type;
7457 }
e5009240 7458
84fba055 7459 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 7460 if (IS_ERR(obj)) {
7461 err = PTR_ERR(obj);
b131c964 7462 goto err_init;
e5009240 7463 }
d152159b 7464 obj->key.table = table;
3ecbfd65
HS		 7465 obj->handle = nf_tables_alloc_handle(table);
7466
33758c89 7467 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 7468 if (!obj->key.name) {
61509575 7469 err = -ENOMEM;
b131c964
JGG		 7470 goto err_strdup;
7471 }
7472
7473 if (nla[NFTA_OBJ_USERDATA]) {
af0acf22 7474 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
b131c964
JGG		 7475 if (obj->udata == NULL)
7476 goto err_userdata;
7477
85db827a 7478 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 7479 }
e5009240
PNA		 7480
7481 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
7482 if (err < 0)
b131c964 7483 goto err_trans;
e5009240 7484
4d44175a
FW		 7485 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
7486 nft_objname_ht_params);
7487 if (err < 0)
b131c964 7488 goto err_obj_ht;
4d44175a 7489
e5009240 7490 list_add_tail_rcu(&obj->list, &table->objects);
1689f259 7491
e5009240 7492 return 0;
b131c964 7493err_obj_ht:
4d44175a
FW		 7494 /* queued in transaction log */
7495 INIT_LIST_HEAD(&obj->list);
7496 return err;
b131c964 7497err_trans:
b131c964 7498 kfree(obj->udata);
85dfd816
PNA		 7499err_userdata:
7500 kfree(obj->key.name);
b131c964 7501err_strdup:
dfc46034 7502 if (obj->ops->destroy)
00bfb320 7503 obj->ops->destroy(&ctx, obj);
e5009240 7504 kfree(obj);
b131c964 7505err_init:
e5009240 7506 module_put(type->owner);
1689f259
PNA		 7507err_type:
7508 nft_use_dec_restore(&table->use);
7509
e5009240
PNA		 7510 return err;
7511}
7512
7513static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
7514 u32 portid, u32 seq, int event, u32 flags,
7515 int family, const struct nft_table *table,
43da04a5 7516 struct nft_object *obj, bool reset)
e5009240 7517{
e5009240
PNA		 7518 struct nlmsghdr *nlh;
7519
dedb67c4 7520 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7521 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7522 NFNETLINK_V0, nft_base_seq(net));
7523 if (!nlh)
e5009240
PNA		 7524 goto nla_put_failure;
7525
e5009240 7526 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 7527 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
3ecbfd65
HS		 7528 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7529 NFTA_OBJ_PAD))
e5009240
PNA		 7530 goto nla_put_failure;
7531
28339b21
PNA		 7532 if (event == NFT_MSG_DELOBJ) {
7533 nlmsg_end(skb, nlh);
7534 return 0;
7535 }
7536
7537 if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
7538 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
7539 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
7540 goto nla_put_failure;
7541
b131c964
JGG		 7542 if (obj->udata &&
7543 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7544 goto nla_put_failure;
7545
e5009240
PNA		 7546 nlmsg_end(skb, nlh);
7547 return 0;
7548
7549nla_put_failure:
7550 nlmsg_trim(skb, nlh);
7551 return -1;
7552}
7553
a9fea2a3 7554struct nft_obj_filter {
e46abbcc 7555 char *table;
a9fea2a3
PNA		 7556 u32 type;
7557};
7558
e5009240
PNA		 7559static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7560{
7561 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
e5009240 7562 const struct nft_table *table;
e5009240 7563 unsigned int idx = 0, s_idx = cb->args[0];
a9fea2a3 7564 struct nft_obj_filter *filter = cb->data;
e5009240
PNA		 7565 struct net *net = sock_net(skb->sk);
7566 int family = nfmsg->nfgen_family;
0854db2a 7567 struct nftables_pernet *nft_net;
43da04a5
PNA		 7568 struct nft_object *obj;
7569 bool reset = false;
7570
7571 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7572 reset = true;
e5009240
PNA		 7573
7574 rcu_read_lock();
d59d2f82 7575 nft_net = nft_pernet(net);
34002783 7576 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 7577
0854db2a 7578 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7579 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 7580 continue;
7581
36596dad
PNA		 7582 list_for_each_entry_rcu(obj, &table->objects, list) {
7583 if (!nft_is_active(net, obj))
7584 goto cont;
7585 if (idx < s_idx)
7586 goto cont;
7587 if (idx > s_idx)
7588 memset(&cb->args[1], 0,
7589 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7590 if (filter && filter->table &&
36596dad
PNA		 7591 strcmp(filter->table, table->name))
7592 goto cont;
7593 if (filter &&
7594 filter->type != NFT_OBJECT_UNSPEC &&
7595 obj->ops->type->type != filter->type)
7596 goto cont;
8e6cf365 7597 if (reset) {
68df2ed5 7598 char *buf = kasprintf(GFP_ATOMIC,
c520292f 7599 "%s:%u",
8e6cf365 7600 table->name,
0854db2a 7601 nft_net->base_seq);
8e6cf365
RGB		 7602
7603 audit_log_nfcfg(buf,
7604 family,
7605 obj->handle,
14224039 7606 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7607 GFP_ATOMIC);
8e6cf365
RGB		 7608 kfree(buf);
7609 }
7610
36596dad
PNA		 7611 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7612 cb->nlh->nlmsg_seq,
7613 NFT_MSG_NEWOBJ,
7614 NLM_F_MULTI | NLM_F_APPEND,
98319cb9 7615 table->family, table,
36596dad
PNA		 7616 obj, reset) < 0)
7617 goto done;
e5009240 7618
36596dad 7619 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7620cont:
36596dad 7621 idx++;
e5009240
PNA		 7622 }
7623 }
7624done:
7625 rcu_read_unlock();
7626
7627 cb->args[0] = idx;
7628 return skb->len;
7629}
7630
90fd131a 7631static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7632{
90fd131a
FW		 7633 const struct nlattr * const *nla = cb->data;
7634 struct nft_obj_filter *filter = NULL;
e46abbcc 7635
90fd131a
FW		 7636 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7637 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7638 if (!filter)
7639 return -ENOMEM;
7640
7641 if (nla[NFTA_OBJ_TABLE]) {
7642 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7643 if (!filter->table) {
7644 kfree(filter);
7645 return -ENOMEM;
7646 }
7647 }
7648
7649 if (nla[NFTA_OBJ_TYPE])
7650 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
8bea728d 7651 }
a9fea2a3 7652
90fd131a 7653 cb->data = filter;
a9fea2a3
PNA		 7654 return 0;
7655}
7656
90fd131a 7657static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7658{
90fd131a 7659 struct nft_obj_filter *filter = cb->data;
a9fea2a3 7660
90fd131a
FW		 7661 if (filter) {
7662 kfree(filter->table);
7663 kfree(filter);
e46abbcc 7664 }
a9fea2a3 7665
90fd131a 7666 return 0;
a9fea2a3
PNA		 7667}
7668
d9adf22a 7669/* called with rcu_read_lock held */
797d4980
PNA		 7670static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7671 const struct nlattr * const nla[])
e5009240 7672{
797d4980
PNA		 7673 struct netlink_ext_ack *extack = info->extack;
7674 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7675 u8 family = info->nfmsg->nfgen_family;
e5009240 7676 const struct nft_table *table;
797d4980 7677 struct net *net = info->net;
e5009240
PNA		 7678 struct nft_object *obj;
7679 struct sk_buff *skb2;
43da04a5 7680 bool reset = false;
e5009240
PNA		 7681 u32 objtype;
7682 int err;
7683
797d4980 7684 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7685 struct netlink_dump_control c = {
90fd131a 7686 .start = nf_tables_dump_obj_start,
e5009240 7687 .dump = nf_tables_dump_obj,
a9fea2a3 7688 .done = nf_tables_dump_obj_done,
d9adf22a 7689 .module = THIS_MODULE,
90fd131a 7690 .data = (void *)nla,
e5009240 7691 };
a9fea2a3 7692
797d4980 7693 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7694 }
7695
7696 if (!nla[NFTA_OBJ_NAME] ||
7697 !nla[NFTA_OBJ_TYPE])
7698 return -EINVAL;
7699
6001a930 7700 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7701 if (IS_ERR(table)) {
7702 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7703 return PTR_ERR(table);
36dd1bcc 7704 }
e5009240
PNA		 7705
7706 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7707 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7708 if (IS_ERR(obj)) {
7709 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7710 return PTR_ERR(obj);
36dd1bcc 7711 }
e5009240 7712
d9adf22a 7713 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7714 if (!skb2)
7715 return -ENOMEM;
7716
797d4980 7717 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7718 reset = true;
7719
8e6cf365 7720 if (reset) {
0854db2a
FW		 7721 const struct nftables_pernet *nft_net;
7722 char *buf;
7723
d59d2f82 7724 nft_net = nft_pernet(net);
0854db2a 7725 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7726
7727 audit_log_nfcfg(buf,
7728 family,
7729 obj->handle,
14224039 7730 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7731 GFP_ATOMIC);
8e6cf365
RGB		 7732 kfree(buf);
7733 }
7734
e5009240 7735 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7736 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7737 family, table, obj, reset);
e5009240 7738 if (err < 0)
ee921183 7739 goto err_fill_obj_info;
e5009240 7740
ee921183
PNA		 7741 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7742
7743err_fill_obj_info:
e5009240
PNA		 7744 kfree_skb(skb2);
7745 return err;
e5009240
PNA		 7746}
7747
00bfb320 7748static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7749{
dfc46034 7750 if (obj->ops->destroy)
00bfb320 7751 obj->ops->destroy(ctx, obj);
e5009240 7752
dfc46034 7753 module_put(obj->ops->type->owner);
d152159b 7754 kfree(obj->key.name);
bc7a7082 7755 kfree(obj->udata);
e5009240
PNA		 7756 kfree(obj);
7757}
7758
7dab8ee3
PNA		 7759static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7760 const struct nlattr * const nla[])
e5009240 7761{
7dab8ee3
PNA		 7762 struct netlink_ext_ack *extack = info->extack;
7763 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7764 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7765 struct net *net = info->net;
36dd1bcc 7766 const struct nlattr *attr;
e5009240
PNA		 7767 struct nft_table *table;
7768 struct nft_object *obj;
7769 struct nft_ctx ctx;
7770 u32 objtype;
7771
7772 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7773 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7774 return -EINVAL;
7775
6001a930
PNA		 7776 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7777 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7778 if (IS_ERR(table)) {
7779 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7780 return PTR_ERR(table);
36dd1bcc 7781 }
e5009240
PNA		 7782
7783 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7784 if (nla[NFTA_OBJ_HANDLE]) {
7785 attr = nla[NFTA_OBJ_HANDLE];
7786 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7787 } else {
7788 attr = nla[NFTA_OBJ_NAME];
4d44175a 7789 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7790 }
7791
7792 if (IS_ERR(obj)) {
f80a612d
FFM		 7793 if (PTR_ERR(obj) == -ENOENT &&
7794 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
7795 return 0;
7796
36dd1bcc 7797 NL_SET_BAD_ATTR(extack, attr);
e5009240 7798 return PTR_ERR(obj);
36dd1bcc
PNA		 7799 }
7800 if (obj->use > 0) {
7801 NL_SET_BAD_ATTR(extack, attr);
e5009240 7802 return -EBUSY;
36dd1bcc 7803 }
e5009240 7804
7dab8ee3 7805 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7806
7807 return nft_delobj(&ctx, obj);
7808}
7809
d152159b 7810void nft_obj_notify(struct net *net, const struct nft_table *table,
25e94a99 7811 struct nft_object *obj, u32 portid, u32 seq, int event,
6fb721cf 7812 u16 flags, int family, int report, gfp_t gfp)
e5009240 7813{
d59d2f82 7814 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7815 struct sk_buff *skb;
7816 int err;
c520292f 7817 char *buf = kasprintf(gfp, "%s:%u",
0854db2a 7818 table->name, nft_net->base_seq);
8e6cf365
RGB		 7819
7820 audit_log_nfcfg(buf,
7821 family,
7822 obj->handle,
7823 event == NFT_MSG_NEWOBJ ?
c520292f
RGB		 7824 AUDIT_NFT_OP_OBJ_REGISTER :
7825 AUDIT_NFT_OP_OBJ_UNREGISTER,
68df2ed5 7826 gfp);
8e6cf365 7827 kfree(buf);
e5009240 7828
2599e989
PNA		 7829 if (!report &&
7830 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7831 return;
e5009240 7832
2599e989 7833 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7834 if (skb == NULL)
7835 goto err;
7836
6fb721cf
PNA		 7837 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7838 flags & (NLM_F_CREATE | NLM_F_EXCL),
7839 family, table, obj, false);
e5009240
PNA		 7840 if (err < 0) {
7841 kfree_skb(skb);
7842 goto err;
7843 }
7844
0854db2a 7845 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7846 return;
e5009240 7847err:
25e94a99 7848 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7849}
2599e989
PNA		 7850EXPORT_SYMBOL_GPL(nft_obj_notify);
7851
25e94a99
PNA		 7852static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7853 struct nft_object *obj, int event)
2599e989 7854{
25e94a99 7855 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
6fb721cf 7856 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
2599e989 7857}
e5009240 7858
3b49e2e9
PNA		 7859/*
7860 * Flow tables
7861 */
7862void nft_register_flowtable_type(struct nf_flowtable_type *type)
7863{
7864 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7865 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7866 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7867}
7868EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7869
7870void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7871{
7872 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7873 list_del_rcu(&type->list);
7874 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7875}
7876EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7877
7878static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7879 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7880 .len = NFT_NAME_MAXLEN - 1 },
7881 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7882 .len = NFT_NAME_MAXLEN - 1 },
7883 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 7884 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 7885 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 7886};
7887
cac20fcd
PNA		 7888struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7889 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 7890{
7891 struct nft_flowtable *flowtable;
7892
d9adf22a 7893 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 7894 if (!nla_strcmp(nla, flowtable->name) &&
7895 nft_active_genmask(flowtable, genmask))
7896 return flowtable;
7897 }
7898 return ERR_PTR(-ENOENT);
7899}
cac20fcd 7900EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 7901
9b05b6e1
LGL		 7902void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7903 struct nft_flowtable *flowtable,
7904 enum nft_trans_phase phase)
7905{
7906 switch (phase) {
26b5a571 7907 case NFT_TRANS_PREPARE_ERROR:
9b05b6e1
LGL		 7908 case NFT_TRANS_PREPARE:
7909 case NFT_TRANS_ABORT:
7910 case NFT_TRANS_RELEASE:
1689f259 7911 nft_use_dec(&flowtable->use);
954d8297 7912 fallthrough;
9b05b6e1
LGL		 7913 default:
7914 return;
7915 }
7916}
7917EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7918
ae0662f8 7919static struct nft_flowtable *
cac20fcd
PNA		 7920nft_flowtable_lookup_byhandle(const struct nft_table *table,
7921 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 7922{
7923 struct nft_flowtable *flowtable;
7924
7925 list_for_each_entry(flowtable, &table->flowtables, list) {
7926 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7927 nft_active_genmask(flowtable, genmask))
7928 return flowtable;
7929 }
7930 return ERR_PTR(-ENOENT);
7931}
7932
d9246a53
PNA		 7933struct nft_flowtable_hook {
7934 u32 num;
7935 int priority;
7936 struct list_head list;
7937};
7938
3b49e2e9
PNA		 7939static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7940 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7941 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7942 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7943};
7944
d9246a53 7945static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
8509f62b 7946 const struct nlattr * const nla[],
d9246a53 7947 struct nft_flowtable_hook *flowtable_hook,
c3c060ad
PNA		 7948 struct nft_flowtable *flowtable,
7949 struct netlink_ext_ack *extack, bool add)
3b49e2e9 7950{
3b49e2e9 7951 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 7952 struct nft_hook *hook;
3b49e2e9 7953 int hooknum, priority;
3f0465a9 7954 int err;
3b49e2e9 7955
d9246a53
PNA		 7956 INIT_LIST_HEAD(&flowtable_hook->list);
7957
8509f62b
PNA		 7958 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX,
7959 nla[NFTA_FLOWTABLE_HOOK],
8cb08174 7960 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 7961 if (err < 0)
7962 return err;
7963
5b6743fb
PNA		 7964 if (add) {
7965 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
8509f62b
PNA		 7966 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7967 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
7968 return -ENOENT;
7969 }
3b49e2e9 7970
5b6743fb
PNA		 7971 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7972 if (hooknum != NF_NETDEV_INGRESS)
7973 return -EOPNOTSUPP;
7974
7975 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7976
7977 flowtable_hook->priority = priority;
7978 flowtable_hook->num = hooknum;
7979 } else {
7980 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7981 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7982 if (hooknum != flowtable->hooknum)
7983 return -EOPNOTSUPP;
7984 }
7985
7986 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7987 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7988 if (priority != flowtable->data.priority)
7989 return -EOPNOTSUPP;
7990 }
3b49e2e9 7991
5b6743fb
PNA		 7992 flowtable_hook->priority = flowtable->data.priority;
7993 flowtable_hook->num = flowtable->hooknum;
7994 }
3b49e2e9 7995
05abe445
PNA		 7996 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7997 err = nf_tables_parse_netdev_hooks(ctx->net,
7998 tb[NFTA_FLOWTABLE_HOOK_DEVS],
c3c060ad
PNA		 7999 &flowtable_hook->list,
8000 extack);
05abe445
PNA		 8001 if (err < 0)
8002 return err;
8003 }
3b49e2e9 8004
d9246a53 8005 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 8006 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 8007 hook->ops.hooknum = flowtable_hook->num;
8008 hook->ops.priority = flowtable_hook->priority;
8009 hook->ops.priv = &flowtable->data;
8010 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 8011 }
8012
3b49e2e9
PNA		 8013 return err;
8014}
8015
98319cb9 8016static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 8017{
8018 const struct nf_flowtable_type *type;
8019
8020 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 8021 if (family == type->family)
3b49e2e9
PNA		 8022 return type;
8023 }
8024 return NULL;
8025}
8026
452238e8
FW		 8027static const struct nf_flowtable_type *
8028nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 8029{
8030 const struct nf_flowtable_type *type;
8031
98319cb9 8032 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 8033 if (type != NULL && try_module_get(type->owner))
8034 return type;
8035
f102d66b 8036 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 8037#ifdef CONFIG_MODULES
8038 if (type == NULL) {
eb014de4 8039 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 8040 return ERR_PTR(-EAGAIN);
8041 }
8042#endif
8043 return ERR_PTR(-ENOENT);
8044}
8045
5acab914 8046/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 8047static void nft_unregister_flowtable_hook(struct net *net,
8048 struct nft_flowtable *flowtable,
8049 struct nft_hook *hook)
8050{
8051 nf_unregister_net_hook(net, &hook->ops);
8052 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8053 FLOW_BLOCK_UNBIND);
8054}
8055
f9a43007
PNA		 8056static void __nft_unregister_flowtable_net_hooks(struct net *net,
8057 struct list_head *hook_list,
8058 bool release_netdev)
3b49e2e9 8059{
f9a43007 8060 struct nft_hook *hook, *next;
3b49e2e9 8061
f9a43007 8062 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 8063 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 8064 if (release_netdev) {
8065 list_del(&hook->list);
ab5e5c06 8066 kfree_rcu(hook, rcu);
f9a43007
PNA		 8067 }
8068 }
8069}
8070
8071static void nft_unregister_flowtable_net_hooks(struct net *net,
8072 struct list_head *hook_list)
8073{
8074 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 8075}
8076
8077static int nft_register_flowtable_net_hooks(struct net *net,
8078 struct nft_table *table,
f9382669 8079 struct list_head *hook_list,
3f0465a9
PNA		 8080 struct nft_flowtable *flowtable)
8081{
8082 struct nft_hook *hook, *hook2, *next;
8083 struct nft_flowtable *ft;
8084 int err, i = 0;
8085
f9382669 8086 list_for_each_entry(hook, hook_list, list) {
3f0465a9 8087 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 8088 if (!nft_is_active_next(net, ft))
8089 continue;
8090
3f0465a9
PNA		 8091 list_for_each_entry(hook2, &ft->hook_list, list) {
8092 if (hook->ops.dev == hook2->ops.dev &&
8093 hook->ops.pf == hook2->ops.pf) {
77a92189 8094 err = -EEXIST;
3f0465a9
PNA		 8095 goto err_unregister_net_hooks;
8096 }
8097 }
8098 }
3b49e2e9 8099
d7c03a9f 8100 err = flowtable->data.type->setup(&flowtable->data,
8101 hook->ops.dev,
8102 FLOW_BLOCK_BIND);
3f0465a9
PNA		 8103 if (err < 0)
8104 goto err_unregister_net_hooks;
8105
d7c03a9f 8106 err = nf_register_net_hook(net, &hook->ops);
8107 if (err < 0) {
8108 flowtable->data.type->setup(&flowtable->data,
8109 hook->ops.dev,
8110 FLOW_BLOCK_UNBIND);
8111 goto err_unregister_net_hooks;
8112 }
8113
3f0465a9 8114 i++;
3b49e2e9 8115 }
3f0465a9
PNA		 8116
8117 return 0;
8118
8119err_unregister_net_hooks:
f9382669 8120 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 8121 if (i-- <= 0)
8122 break;
8123
ff4bf2f4 8124 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8125 list_del_rcu(&hook->list);
8126 kfree_rcu(hook, rcu);
8127 }
8128
8129 return err;
3b49e2e9
PNA		 8130}
8131
cdc32546 8132static void nft_hooks_destroy(struct list_head *hook_list)
389a2cbc
PNA		 8133{
8134 struct nft_hook *hook, *next;
8135
8136 list_for_each_entry_safe(hook, next, hook_list, list) {
8137 list_del_rcu(&hook->list);
8138 kfree_rcu(hook, rcu);
8139 }
8140}
8141
78d9f48f 8142static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
c3c060ad
PNA		 8143 struct nft_flowtable *flowtable,
8144 struct netlink_ext_ack *extack)
78d9f48f
PNA		 8145{
8146 const struct nlattr * const *nla = ctx->nla;
8147 struct nft_flowtable_hook flowtable_hook;
8148 struct nft_hook *hook, *next;
8149 struct nft_trans *trans;
8150 bool unregister = false;
7b35582c 8151 u32 flags;
78d9f48f
PNA		 8152 int err;
8153
8509f62b
PNA		 8154 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8155 extack, false);
78d9f48f
PNA		 8156 if (err < 0)
8157 return err;
8158
8159 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8160 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
8161 list_del(&hook->list);
8162 kfree(hook);
8163 }
8164 }
8165
7b35582c
PNA		 8166 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8167 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 8168 if (flags & ~NFT_FLOWTABLE_MASK) {
8169 err = -EOPNOTSUPP;
8170 goto err_flowtable_update_hook;
8171 }
7b35582c 8172 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 8173 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
8174 err = -EOPNOTSUPP;
8175 goto err_flowtable_update_hook;
8176 }
7b35582c
PNA		 8177 } else {
8178 flags = flowtable->data.flags;
8179 }
8180
78d9f48f
PNA		 8181 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
8182 &flowtable_hook.list, flowtable);
8183 if (err < 0)
8184 goto err_flowtable_update_hook;
8185
8186 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
8187 sizeof(struct nft_trans_flowtable));
8188 if (!trans) {
8189 unregister = true;
8190 err = -ENOMEM;
8191 goto err_flowtable_update_hook;
8192 }
8193
7b35582c 8194 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 8195 nft_trans_flowtable(trans) = flowtable;
8196 nft_trans_flowtable_update(trans) = true;
8197 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
8198 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
8199
0854db2a 8200 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 8201
8202 return 0;
8203
8204err_flowtable_update_hook:
8205 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8206 if (unregister)
8207 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
8208 list_del_rcu(&hook->list);
8209 kfree_rcu(hook, rcu);
8210 }
8211
8212 return err;
8213
8214}
8215
7dab8ee3
PNA		 8216static int nf_tables_newflowtable(struct sk_buff *skb,
8217 const struct nfnl_info *info,
8218 const struct nlattr * const nla[])
3b49e2e9 8219{
7dab8ee3 8220 struct netlink_ext_ack *extack = info->extack;
d9246a53 8221 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 8222 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8223 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8224 const struct nf_flowtable_type *type;
3f0465a9
PNA		 8225 struct nft_flowtable *flowtable;
8226 struct nft_hook *hook, *next;
7dab8ee3 8227 struct net *net = info->net;
3b49e2e9
PNA		 8228 struct nft_table *table;
8229 struct nft_ctx ctx;
3f0465a9 8230 int err;
3b49e2e9
PNA		 8231
8232 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8233 !nla[NFTA_FLOWTABLE_NAME] ||
8234 !nla[NFTA_FLOWTABLE_HOOK])
8235 return -EINVAL;
8236
cac20fcd 8237 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8238 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8239 if (IS_ERR(table)) {
8240 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8241 return PTR_ERR(table);
36dd1bcc 8242 }
3b49e2e9 8243
cac20fcd
PNA		 8244 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8245 genmask);
3b49e2e9
PNA		 8246 if (IS_ERR(flowtable)) {
8247 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 8248 if (err != -ENOENT) {
8249 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8250 return err;
36dd1bcc 8251 }
3b49e2e9 8252 } else {
7dab8ee3 8253 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 8254 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8255 return -EEXIST;
36dd1bcc 8256 }
3b49e2e9 8257
7dab8ee3 8258 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 8259
c3c060ad 8260 return nft_flowtable_update(&ctx, info->nlh, flowtable, extack);
3b49e2e9
PNA		 8261 }
8262
7dab8ee3 8263 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 8264
1689f259
PNA		 8265 if (!nft_use_inc(&table->use))
8266 return -EMFILE;
8267
33758c89 8268 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
1689f259
PNA		 8269 if (!flowtable) {
8270 err = -ENOMEM;
8271 goto flowtable_alloc;
8272 }
3b49e2e9
PNA		 8273
8274 flowtable->table = table;
3ecbfd65 8275 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 8276 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 8277
33758c89 8278 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 8279 if (!flowtable->name) {
8280 err = -ENOMEM;
8281 goto err1;
8282 }
8283
452238e8 8284 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 8285 if (IS_ERR(type)) {
8286 err = PTR_ERR(type);
8287 goto err2;
8288 }
8289
8bb69f3b
PNA		 8290 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8291 flowtable->data.flags =
8292 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 8293 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
8294 err = -EOPNOTSUPP;
8bb69f3b 8295 goto err3;
7e6136f1 8296 }
8bb69f3b
PNA		 8297 }
8298
8299 write_pnet(&flowtable->data.net, net);
3b49e2e9 8300 flowtable->data.type = type;
a268de77 8301 err = type->init(&flowtable->data);
3b49e2e9
PNA		 8302 if (err < 0)
8303 goto err3;
8304
8509f62b
PNA		 8305 err = nft_flowtable_parse_hook(&ctx, nla, &flowtable_hook, flowtable,
8306 extack, true);
3b49e2e9 8307 if (err < 0)
a268de77 8308 goto err4;
3b49e2e9 8309
d9246a53
PNA		 8310 list_splice(&flowtable_hook.list, &flowtable->hook_list);
8311 flowtable->data.priority = flowtable_hook.priority;
8312 flowtable->hooknum = flowtable_hook.num;
8313
f9382669
PNA		 8314 err = nft_register_flowtable_net_hooks(ctx.net, table,
8315 &flowtable->hook_list,
8316 flowtable);
2d285f26 8317 if (err < 0) {
cdc32546 8318 nft_hooks_destroy(&flowtable->hook_list);
3f0465a9 8319 goto err4;
2d285f26 8320 }
3b49e2e9
PNA		 8321
8322 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
8323 if (err < 0)
3f0465a9 8324 goto err5;
3b49e2e9
PNA		 8325
8326 list_add_tail_rcu(&flowtable->list, &table->flowtables);
3b49e2e9
PNA		 8327
8328 return 0;
a268de77 8329err5:
3f0465a9 8330 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 8331 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8332 list_del_rcu(&hook->list);
8333 kfree_rcu(hook, rcu);
8334 }
a268de77
FF		 8335err4:
8336 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 8337err3:
8338 module_put(type->owner);
8339err2:
8340 kfree(flowtable->name);
8341err1:
8342 kfree(flowtable);
1689f259
PNA		 8343flowtable_alloc:
8344 nft_use_dec_restore(&table->use);
8345
3b49e2e9
PNA		 8346 return err;
8347}
8348
3003055f
PNA		 8349static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
8350{
8351 struct nft_hook *this, *next;
8352
8353 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
8354 list_del(&this->list);
8355 kfree(this);
8356 }
8357}
8358
abadb2f8 8359static int nft_delflowtable_hook(struct nft_ctx *ctx,
c3c060ad
PNA		 8360 struct nft_flowtable *flowtable,
8361 struct netlink_ext_ack *extack)
abadb2f8
PNA		 8362{
8363 const struct nlattr * const *nla = ctx->nla;
8364 struct nft_flowtable_hook flowtable_hook;
b6d9014a 8365 LIST_HEAD(flowtable_del_list);
3003055f 8366 struct nft_hook *this, *hook;
abadb2f8
PNA		 8367 struct nft_trans *trans;
8368 int err;
8369
8509f62b
PNA		 8370 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8371 extack, false);
abadb2f8
PNA		 8372 if (err < 0)
8373 return err;
8374
3003055f 8375 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 8376 hook = nft_hook_list_find(&flowtable->hook_list, this);
8377 if (!hook) {
8378 err = -ENOENT;
8379 goto err_flowtable_del_hook;
8380 }
b6d9014a 8381 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 8382 }
8383
8384 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
8385 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 8386 if (!trans) {
8387 err = -ENOMEM;
8388 goto err_flowtable_del_hook;
8389 }
abadb2f8
PNA		 8390
8391 nft_trans_flowtable(trans) = flowtable;
8392 nft_trans_flowtable_update(trans) = true;
8393 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 8394 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 8395 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 8396
0854db2a 8397 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 8398
8399 return 0;
8400
8401err_flowtable_del_hook:
b6d9014a 8402 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 8403 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 8404
8405 return err;
8406}
8407
7dab8ee3
PNA		 8408static int nf_tables_delflowtable(struct sk_buff *skb,
8409 const struct nfnl_info *info,
8410 const struct nlattr * const nla[])
3b49e2e9 8411{
7dab8ee3
PNA		 8412 struct netlink_ext_ack *extack = info->extack;
8413 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8414 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8415 struct nft_flowtable *flowtable;
7dab8ee3 8416 struct net *net = info->net;
36dd1bcc 8417 const struct nlattr *attr;
3b49e2e9
PNA		 8418 struct nft_table *table;
8419 struct nft_ctx ctx;
8420
e603ea4b
PNA		 8421 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8422 (!nla[NFTA_FLOWTABLE_NAME] &&
8423 !nla[NFTA_FLOWTABLE_HANDLE]))
8424 return -EINVAL;
8425
cac20fcd 8426 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8427 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8428 if (IS_ERR(table)) {
8429 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8430 return PTR_ERR(table);
36dd1bcc 8431 }
3b49e2e9 8432
36dd1bcc
PNA		 8433 if (nla[NFTA_FLOWTABLE_HANDLE]) {
8434 attr = nla[NFTA_FLOWTABLE_HANDLE];
8435 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
8436 } else {
8437 attr = nla[NFTA_FLOWTABLE_NAME];
8438 flowtable = nft_flowtable_lookup(table, attr, genmask);
8439 }
8440
8441 if (IS_ERR(flowtable)) {
f80a612d
FFM		 8442 if (PTR_ERR(flowtable) == -ENOENT &&
8443 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
8444 return 0;
8445
36dd1bcc
PNA		 8446 NL_SET_BAD_ATTR(extack, attr);
8447 return PTR_ERR(flowtable);
8448 }
abadb2f8 8449
7dab8ee3 8450 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 8451
8452 if (nla[NFTA_FLOWTABLE_HOOK])
c3c060ad 8453 return nft_delflowtable_hook(&ctx, flowtable, extack);
abadb2f8 8454
36dd1bcc
PNA		 8455 if (flowtable->use > 0) {
8456 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 8457 return -EBUSY;
36dd1bcc 8458 }
3b49e2e9 8459
3b49e2e9
PNA		 8460 return nft_delflowtable(&ctx, flowtable);
8461}
8462
8463static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
8464 u32 portid, u32 seq, int event,
8465 u32 flags, int family,
c42d8bda
PNA		 8466 struct nft_flowtable *flowtable,
8467 struct list_head *hook_list)
3b49e2e9
PNA		 8468{
8469 struct nlattr *nest, *nest_devs;
3f0465a9 8470 struct nft_hook *hook;
3b49e2e9 8471 struct nlmsghdr *nlh;
3b49e2e9
PNA		 8472
8473 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 8474 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
8475 NFNETLINK_V0, nft_base_seq(net));
8476 if (!nlh)
3b49e2e9
PNA		 8477 goto nla_put_failure;
8478
3b49e2e9
PNA		 8479 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
8480 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65 8481 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
28339b21
PNA		 8482 NFTA_FLOWTABLE_PAD))
8483 goto nla_put_failure;
8484
8485 if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
8486 nlmsg_end(skb, nlh);
8487 return 0;
8488 }
8489
8490 if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
8bb69f3b 8491 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 8492 goto nla_put_failure;
8493
ae0be8de 8494 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 8495 if (!nest)
8496 goto nla_put_failure;
3b49e2e9 8497 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 8498 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 8499 goto nla_put_failure;
8500
ae0be8de 8501 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 8502 if (!nest_devs)
8503 goto nla_put_failure;
8504
28339b21
PNA		 8505 if (!hook_list)
8506 hook_list = &flowtable->hook_list;
8507
c42d8bda 8508 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 8509 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 8510 goto nla_put_failure;
8511 }
8512 nla_nest_end(skb, nest_devs);
8513 nla_nest_end(skb, nest);
8514
8515 nlmsg_end(skb, nlh);
8516 return 0;
8517
8518nla_put_failure:
8519 nlmsg_trim(skb, nlh);
8520 return -1;
8521}
8522
8523struct nft_flowtable_filter {
8524 char *table;
8525};
8526
8527static int nf_tables_dump_flowtable(struct sk_buff *skb,
8528 struct netlink_callback *cb)
8529{
8530 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
8531 struct nft_flowtable_filter *filter = cb->data;
8532 unsigned int idx = 0, s_idx = cb->args[0];
8533 struct net *net = sock_net(skb->sk);
8534 int family = nfmsg->nfgen_family;
8535 struct nft_flowtable *flowtable;
0854db2a 8536 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 8537 const struct nft_table *table;
8538
8539 rcu_read_lock();
d59d2f82 8540 nft_net = nft_pernet(net);
34002783 8541 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 8542
0854db2a 8543 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 8544 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 8545 continue;
8546
36596dad
PNA		 8547 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8548 if (!nft_is_active(net, flowtable))
8549 goto cont;
8550 if (idx < s_idx)
8551 goto cont;
8552 if (idx > s_idx)
8553 memset(&cb->args[1], 0,
8554 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 8555 if (filter && filter->table &&
36596dad
PNA		 8556 strcmp(filter->table, table->name))
8557 goto cont;
3b49e2e9 8558
36596dad
PNA		 8559 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
8560 cb->nlh->nlmsg_seq,
8561 NFT_MSG_NEWFLOWTABLE,
8562 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda 8563 table->family,
28339b21 8564 flowtable, NULL) < 0)
36596dad 8565 goto done;
3b49e2e9 8566
36596dad 8567 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 8568cont:
36596dad 8569 idx++;
3b49e2e9
PNA		 8570 }
8571 }
8572done:
8573 rcu_read_unlock();
8574
8575 cb->args[0] = idx;
8576 return skb->len;
8577}
8578
90fd131a 8579static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 8580{
90fd131a
FW		 8581 const struct nlattr * const *nla = cb->data;
8582 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 8583
90fd131a
FW		 8584 if (nla[NFTA_FLOWTABLE_TABLE]) {
8585 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8586 if (!filter)
8587 return -ENOMEM;
3b49e2e9 8588
90fd131a
FW		 8589 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8590 GFP_ATOMIC);
8591 if (!filter->table) {
8592 kfree(filter);
8593 return -ENOMEM;
8594 }
8595 }
3b49e2e9 8596
90fd131a 8597 cb->data = filter;
3b49e2e9
PNA		 8598 return 0;
8599}
8600
90fd131a 8601static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 8602{
90fd131a 8603 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 8604
3b49e2e9 8605 if (!filter)
90fd131a 8606 return 0;
3b49e2e9 8607
90fd131a
FW		 8608 kfree(filter->table);
8609 kfree(filter);
8610
8611 return 0;
3b49e2e9
PNA		 8612}
8613
d9adf22a 8614/* called with rcu_read_lock held */
797d4980
PNA		 8615static int nf_tables_getflowtable(struct sk_buff *skb,
8616 const struct nfnl_info *info,
8617 const struct nlattr * const nla[])
3b49e2e9 8618{
797d4980 8619 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8620 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8621 struct nft_flowtable *flowtable;
3b49e2e9 8622 const struct nft_table *table;
797d4980 8623 struct net *net = info->net;
3b49e2e9
PNA		 8624 struct sk_buff *skb2;
8625 int err;
8626
797d4980 8627 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8628 struct netlink_dump_control c = {
90fd131a 8629 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8630 .dump = nf_tables_dump_flowtable,
8631 .done = nf_tables_dump_flowtable_done,
d9adf22a 8632 .module = THIS_MODULE,
90fd131a 8633 .data = (void *)nla,
3b49e2e9
PNA		 8634 };
8635
797d4980 8636 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8637 }
8638
8639 if (!nla[NFTA_FLOWTABLE_NAME])
8640 return -EINVAL;
8641
cac20fcd 8642 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8643 genmask, 0);
3b49e2e9
PNA		 8644 if (IS_ERR(table))
8645 return PTR_ERR(table);
8646
cac20fcd
PNA		 8647 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8648 genmask);
03a0120f 8649 if (IS_ERR(flowtable))
3b49e2e9
PNA		 8650 return PTR_ERR(flowtable);
8651
d9adf22a 8652 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8653 if (!skb2)
8654 return -ENOMEM;
8655
8656 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8657 info->nlh->nlmsg_seq,
3b49e2e9 8658 NFT_MSG_NEWFLOWTABLE, 0, family,
28339b21 8659 flowtable, NULL);
3b49e2e9 8660 if (err < 0)
ee921183 8661 goto err_fill_flowtable_info;
3b49e2e9 8662
ee921183
PNA		 8663 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8664
8665err_fill_flowtable_info:
3b49e2e9
PNA		 8666 kfree_skb(skb2);
8667 return err;
8668}
8669
8670static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8671 struct nft_flowtable *flowtable,
28339b21 8672 struct list_head *hook_list, int event)
3b49e2e9 8673{
d59d2f82 8674 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8675 struct sk_buff *skb;
6fb721cf 8676 u16 flags = 0;
3b49e2e9
PNA		 8677 int err;
8678
dceababa 8679 if (!ctx->report &&
3b49e2e9
PNA		 8680 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8681 return;
8682
8683 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8684 if (skb == NULL)
8685 goto err;
8686
6fb721cf
PNA		 8687 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8688 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8689
3b49e2e9 8690 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8691 ctx->seq, event, flags,
c42d8bda 8692 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8693 if (err < 0) {
8694 kfree_skb(skb);
8695 goto err;
8696 }
8697
0854db2a 8698 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8699 return;
8700err:
8701 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8702}
8703
3b49e2e9
PNA		 8704static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8705{
3f0465a9
PNA		 8706 struct nft_hook *hook, *next;
8707
5acab914 8708 flowtable->data.type->free(&flowtable->data);
3f0465a9 8709 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8710 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8711 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8712 list_del_rcu(&hook->list);
8713 kfree(hook);
8714 }
3b49e2e9 8715 kfree(flowtable->name);
3b49e2e9 8716 module_put(flowtable->data.type->owner);
a12486eb 8717 kfree(flowtable);
3b49e2e9
PNA		 8718}
8719
84d7fce6
PNA		 8720static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8721 u32 portid, u32 seq)
8722{
d59d2f82 8723 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8724 struct nlmsghdr *nlh;
784b4e61 8725 char buf[TASK_COMM_LEN];
dedb67c4 8726 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8727
19c28b13
PNA		 8728 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8729 NFNETLINK_V0, nft_base_seq(net));
8730 if (!nlh)
84d7fce6
PNA		 8731 goto nla_put_failure;
8732
0854db2a 8733 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8734 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8735 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8736 goto nla_put_failure;
8737
053c095a
JB		 8738 nlmsg_end(skb, nlh);
8739 return 0;
84d7fce6
PNA		 8740
8741nla_put_failure:
8742 nlmsg_trim(skb, nlh);
8743 return -EMSGSIZE;
8744}
8745
3b49e2e9
PNA		 8746static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8747 struct nft_flowtable *flowtable)
8748{
3f0465a9 8749 struct nft_hook *hook;
3b49e2e9 8750
3f0465a9
PNA		 8751 list_for_each_entry(hook, &flowtable->hook_list, list) {
8752 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8753 continue;
8754
5acab914 8755 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8756 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8757 list_del_rcu(&hook->list);
8758 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8759 break;
8760 }
8761}
8762
8763static int nf_tables_flowtable_event(struct notifier_block *this,
8764 unsigned long event, void *ptr)
8765{
8766 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8767 struct nft_flowtable *flowtable;
0854db2a 8768 struct nftables_pernet *nft_net;
3b49e2e9 8769 struct nft_table *table;
0a2cf5ee 8770 struct net *net;
3b49e2e9
PNA		 8771
8772 if (event != NETDEV_UNREGISTER)
8773 return 0;
8774
6a48de01 8775 net = dev_net(dev);
d59d2f82 8776 nft_net = nft_pernet(net);
0854db2a
FW		 8777 mutex_lock(&nft_net->commit_mutex);
8778 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8779 list_for_each_entry(flowtable, &table->flowtables, list) {
8780 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8781 }
8782 }
0854db2a 8783 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8784
3b49e2e9
PNA		 8785 return NOTIFY_DONE;
8786}
8787
8788static struct notifier_block nf_tables_flowtable_notifier = {
8789 .notifier_call = nf_tables_flowtable_event,
8790};
8791
25e94a99
PNA		 8792static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8793 int event)
84d7fce6
PNA		 8794{
8795 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8796 struct sk_buff *skb2;
8797 int err;
8798
dceababa 8799 if (!nlmsg_report(nlh) &&
84d7fce6 8800 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8801 return;
84d7fce6 8802
84d7fce6
PNA		 8803 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8804 if (skb2 == NULL)
8805 goto err;
8806
8807 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8808 nlh->nlmsg_seq);
8809 if (err < 0) {
8810 kfree_skb(skb2);
8811 goto err;
8812 }
8813
25e94a99
PNA		 8814 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8815 nlmsg_report(nlh), GFP_KERNEL);
8816 return;
84d7fce6 8817err:
25e94a99
PNA		 8818 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8819 -ENOBUFS);
84d7fce6
PNA		 8820}
8821
797d4980
PNA		 8822static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8823 const struct nlattr * const nla[])
84d7fce6 8824{
84d7fce6
PNA		 8825 struct sk_buff *skb2;
8826 int err;
8827
d9adf22a 8828 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8829 if (skb2 == NULL)
8830 return -ENOMEM;
8831
797d4980
PNA		 8832 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8833 info->nlh->nlmsg_seq);
84d7fce6 8834 if (err < 0)
ee921183 8835 goto err_fill_gen_info;
84d7fce6 8836
797d4980 8837 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8838
8839err_fill_gen_info:
84d7fce6
PNA		 8840 kfree_skb(skb2);
8841 return err;
8842}
8843
96518518
PM		 8844static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8845 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8846 .call = nf_tables_newtable,
8847 .type = NFNL_CB_BATCH,
96518518
PM		 8848 .attr_count = NFTA_TABLE_MAX,
8849 .policy = nft_table_policy,
8850 },
8851 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8852 .call = nf_tables_gettable,
8853 .type = NFNL_CB_RCU,
96518518
PM		 8854 .attr_count = NFTA_TABLE_MAX,
8855 .policy = nft_table_policy,
8856 },
8857 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8858 .call = nf_tables_deltable,
8859 .type = NFNL_CB_BATCH,
96518518
PM		 8860 .attr_count = NFTA_TABLE_MAX,
8861 .policy = nft_table_policy,
8862 },
f80a612d
FFM		 8863 [NFT_MSG_DESTROYTABLE] = {
8864 .call = nf_tables_deltable,
8865 .type = NFNL_CB_BATCH,
8866 .attr_count = NFTA_TABLE_MAX,
8867 .policy = nft_table_policy,
8868 },
96518518 8869 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8870 .call = nf_tables_newchain,
8871 .type = NFNL_CB_BATCH,
96518518
PM		 8872 .attr_count = NFTA_CHAIN_MAX,
8873 .policy = nft_chain_policy,
8874 },
8875 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8876 .call = nf_tables_getchain,
8877 .type = NFNL_CB_RCU,
96518518
PM		 8878 .attr_count = NFTA_CHAIN_MAX,
8879 .policy = nft_chain_policy,
8880 },
8881 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 8882 .call = nf_tables_delchain,
8883 .type = NFNL_CB_BATCH,
96518518
PM		 8884 .attr_count = NFTA_CHAIN_MAX,
8885 .policy = nft_chain_policy,
8886 },
f80a612d
FFM		 8887 [NFT_MSG_DESTROYCHAIN] = {
8888 .call = nf_tables_delchain,
8889 .type = NFNL_CB_BATCH,
8890 .attr_count = NFTA_CHAIN_MAX,
8891 .policy = nft_chain_policy,
8892 },
96518518 8893 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 8894 .call = nf_tables_newrule,
8895 .type = NFNL_CB_BATCH,
96518518
PM		 8896 .attr_count = NFTA_RULE_MAX,
8897 .policy = nft_rule_policy,
8898 },
8899 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 8900 .call = nf_tables_getrule,
8901 .type = NFNL_CB_RCU,
96518518
PM		 8902 .attr_count = NFTA_RULE_MAX,
8903 .policy = nft_rule_policy,
8904 },
8daa8fde
PS		 8905 [NFT_MSG_GETRULE_RESET] = {
8906 .call = nf_tables_getrule,
8907 .type = NFNL_CB_RCU,
8908 .attr_count = NFTA_RULE_MAX,
8909 .policy = nft_rule_policy,
8910 },
96518518 8911 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 8912 .call = nf_tables_delrule,
8913 .type = NFNL_CB_BATCH,
96518518
PM		 8914 .attr_count = NFTA_RULE_MAX,
8915 .policy = nft_rule_policy,
8916 },
f80a612d
FFM		 8917 [NFT_MSG_DESTROYRULE] = {
8918 .call = nf_tables_delrule,
8919 .type = NFNL_CB_BATCH,
8920 .attr_count = NFTA_RULE_MAX,
8921 .policy = nft_rule_policy,
8922 },
20a69341 8923 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 8924 .call = nf_tables_newset,
8925 .type = NFNL_CB_BATCH,
20a69341
PM		 8926 .attr_count = NFTA_SET_MAX,
8927 .policy = nft_set_policy,
8928 },
8929 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 8930 .call = nf_tables_getset,
8931 .type = NFNL_CB_RCU,
20a69341
PM		 8932 .attr_count = NFTA_SET_MAX,
8933 .policy = nft_set_policy,
8934 },
8935 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 8936 .call = nf_tables_delset,
8937 .type = NFNL_CB_BATCH,
20a69341
PM		 8938 .attr_count = NFTA_SET_MAX,
8939 .policy = nft_set_policy,
8940 },
f80a612d
FFM		 8941 [NFT_MSG_DESTROYSET] = {
8942 .call = nf_tables_delset,
8943 .type = NFNL_CB_BATCH,
8944 .attr_count = NFTA_SET_MAX,
8945 .policy = nft_set_policy,
8946 },
20a69341 8947 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 8948 .call = nf_tables_newsetelem,
8949 .type = NFNL_CB_BATCH,
20a69341
PM		 8950 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8951 .policy = nft_set_elem_list_policy,
8952 },
8953 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 8954 .call = nf_tables_getsetelem,
8955 .type = NFNL_CB_RCU,
20a69341
PM		 8956 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8957 .policy = nft_set_elem_list_policy,
8958 },
079cd633
PS		 8959 [NFT_MSG_GETSETELEM_RESET] = {
8960 .call = nf_tables_getsetelem,
8961 .type = NFNL_CB_RCU,
8962 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8963 .policy = nft_set_elem_list_policy,
8964 },
20a69341 8965 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 8966 .call = nf_tables_delsetelem,
8967 .type = NFNL_CB_BATCH,
20a69341
PM		 8968 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8969 .policy = nft_set_elem_list_policy,
8970 },
f80a612d
FFM		 8971 [NFT_MSG_DESTROYSETELEM] = {
8972 .call = nf_tables_delsetelem,
8973 .type = NFNL_CB_BATCH,
8974 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8975 .policy = nft_set_elem_list_policy,
8976 },
84d7fce6 8977 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 8978 .call = nf_tables_getgen,
8979 .type = NFNL_CB_RCU,
84d7fce6 8980 },
e5009240 8981 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 8982 .call = nf_tables_newobj,
8983 .type = NFNL_CB_BATCH,
e5009240
PNA		 8984 .attr_count = NFTA_OBJ_MAX,
8985 .policy = nft_obj_policy,
8986 },
8987 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 8988 .call = nf_tables_getobj,
8989 .type = NFNL_CB_RCU,
e5009240
PNA		 8990 .attr_count = NFTA_OBJ_MAX,
8991 .policy = nft_obj_policy,
8992 },
8993 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 8994 .call = nf_tables_delobj,
8995 .type = NFNL_CB_BATCH,
e5009240
PNA		 8996 .attr_count = NFTA_OBJ_MAX,
8997 .policy = nft_obj_policy,
8998 },
f80a612d
FFM		 8999 [NFT_MSG_DESTROYOBJ] = {
9000 .call = nf_tables_delobj,
9001 .type = NFNL_CB_BATCH,
9002 .attr_count = NFTA_OBJ_MAX,
9003 .policy = nft_obj_policy,
9004 },
43da04a5 9005 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 9006 .call = nf_tables_getobj,
9007 .type = NFNL_CB_RCU,
43da04a5
PNA		 9008 .attr_count = NFTA_OBJ_MAX,
9009 .policy = nft_obj_policy,
9010 },
3b49e2e9 9011 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 9012 .call = nf_tables_newflowtable,
9013 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 9014 .attr_count = NFTA_FLOWTABLE_MAX,
9015 .policy = nft_flowtable_policy,
9016 },
9017 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 9018 .call = nf_tables_getflowtable,
9019 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 9020 .attr_count = NFTA_FLOWTABLE_MAX,
9021 .policy = nft_flowtable_policy,
9022 },
9023 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 9024 .call = nf_tables_delflowtable,
9025 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 9026 .attr_count = NFTA_FLOWTABLE_MAX,
9027 .policy = nft_flowtable_policy,
9028 },
f80a612d
FFM		 9029 [NFT_MSG_DESTROYFLOWTABLE] = {
9030 .call = nf_tables_delflowtable,
9031 .type = NFNL_CB_BATCH,
9032 .attr_count = NFTA_FLOWTABLE_MAX,
9033 .policy = nft_flowtable_policy,
9034 },
96518518
PM		 9035};
9036
a654de8f
PNA		 9037static int nf_tables_validate(struct net *net)
9038{
d59d2f82 9039 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 9040 struct nft_table *table;
9041
00c320f9
FW		 9042 list_for_each_entry(table, &nft_net->tables, list) {
9043 switch (table->validate_state) {
9044 case NFT_VALIDATE_SKIP:
9045 continue;
9046 case NFT_VALIDATE_NEED:
9047 nft_validate_state_update(table, NFT_VALIDATE_DO);
9048 fallthrough;
9049 case NFT_VALIDATE_DO:
a654de8f
PNA		 9050 if (nft_table_validate(net, table) < 0)
9051 return -EAGAIN;
00c320f9
FW		 9052
9053 nft_validate_state_update(table, NFT_VALIDATE_SKIP);
a654de8f 9054 }
9a32e985 9055
a654de8f
PNA		 9056 break;
9057 }
9058
9059 return 0;
9060}
9061
66293c46
FW		 9062/* a drop policy has to be deferred until all rules have been activated,
9063 * otherwise a large ruleset that contains a drop-policy base chain will
9064 * cause all packets to get dropped until the full transaction has been
9065 * processed.
9066 *
9067 * We defer the drop policy until the transaction has been finalized.
9068 */
9069static void nft_chain_commit_drop_policy(struct nft_trans *trans)
9070{
9071 struct nft_base_chain *basechain;
9072
9073 if (nft_trans_chain_policy(trans) != NF_DROP)
9074 return;
9075
9076 if (!nft_is_base_chain(trans->ctx.chain))
9077 return;
9078
9079 basechain = nft_base_chain(trans->ctx.chain);
9080 basechain->policy = NF_DROP;
9081}
9082
91c7b38d
PNA		 9083static void nft_chain_commit_update(struct nft_trans *trans)
9084{
9085 struct nft_base_chain *basechain;
9086
1b2470e5
FW		 9087 if (nft_trans_chain_name(trans)) {
9088 rhltable_remove(&trans->ctx.table->chains_ht,
9089 &trans->ctx.chain->rhlhead,
9090 nft_chain_ht_params);
d71efb59 9091 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 9092 rhltable_insert_key(&trans->ctx.table->chains_ht,
9093 trans->ctx.chain->name,
9094 &trans->ctx.chain->rhlhead,
9095 nft_chain_ht_params);
9096 }
91c7b38d 9097
f323d954 9098 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 9099 return;
9100
53315ac6
FW		 9101 nft_chain_stats_replace(trans);
9102
91c7b38d 9103 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 9104
9105 switch (nft_trans_chain_policy(trans)) {
9106 case NF_DROP:
9107 case NF_ACCEPT:
9108 basechain->policy = nft_trans_chain_policy(trans);
9109 break;
9110 }
9111}
9112
d62d0ba9
FFM		 9113static void nft_obj_commit_update(struct nft_trans *trans)
9114{
9115 struct nft_object *newobj;
9116 struct nft_object *obj;
9117
9118 obj = nft_trans_obj(trans);
9119 newobj = nft_trans_obj_newobj(trans);
9120
9fedd894
FFM		 9121 if (obj->ops->update)
9122 obj->ops->update(obj, newobj);
d62d0ba9 9123
dad3bdee 9124 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 9125}
9126
2f99aa31 9127static void nft_commit_release(struct nft_trans *trans)
c7c32e72 9128{
c7c32e72
PNA		 9129 switch (trans->msg_type) {
9130 case NFT_MSG_DELTABLE:
f80a612d 9131 case NFT_MSG_DESTROYTABLE:
c7c32e72
PNA		 9132 nf_tables_table_destroy(&trans->ctx);
9133 break;
9f8aac0b 9134 case NFT_MSG_NEWCHAIN:
53315ac6 9135 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 9136 kfree(nft_trans_chain_name(trans));
9137 break;
c7c32e72 9138 case NFT_MSG_DELCHAIN:
f80a612d 9139 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9140 if (nft_trans_chain_update(trans))
9141 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9142 else
9143 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9144 break;
9145 case NFT_MSG_DELRULE:
f80a612d 9146 case NFT_MSG_DESTROYRULE:
c7c32e72
PNA		 9147 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9148 break;
9149 case NFT_MSG_DELSET:
f80a612d 9150 case NFT_MSG_DESTROYSET:
0c2a85ed 9151 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9152 break;
61edafbb 9153 case NFT_MSG_DELSETELEM:
f80a612d 9154 case NFT_MSG_DESTROYSETELEM:
3453c927
PNA		 9155 nf_tables_set_elem_destroy(&trans->ctx,
9156 nft_trans_elem_set(trans),
59105446 9157 nft_trans_elem(trans).priv);
61edafbb 9158 break;
e5009240 9159 case NFT_MSG_DELOBJ:
f80a612d 9160 case NFT_MSG_DESTROYOBJ:
00bfb320 9161 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9162 break;
3b49e2e9 9163 case NFT_MSG_DELFLOWTABLE:
f80a612d 9164 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9165 if (nft_trans_flowtable_update(trans))
cdc32546 9166 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
abadb2f8
PNA		 9167 else
9168 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9169 break;
c7c32e72 9170 }
0935d558
FW		 9171
9172 if (trans->put_net)
9173 put_net(trans->ctx.net);
9174
c7c32e72
PNA		 9175 kfree(trans);
9176}
9177
0935d558 9178static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 9179{
9180 struct nft_trans *trans, *next;
0935d558
FW		 9181 LIST_HEAD(head);
9182
9183 spin_lock(&nf_tables_destroy_list_lock);
9184 list_splice_init(&nf_tables_destroy_list, &head);
9185 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 9186
0935d558 9187 if (list_empty(&head))
2f99aa31
FW		 9188 return;
9189
9190 synchronize_rcu();
9191
0935d558 9192 list_for_each_entry_safe(trans, next, &head, list) {
938154b9 9193 nft_trans_list_del(trans);
2f99aa31
FW		 9194 nft_commit_release(trans);
9195 }
9196}
9197
ffe8923f
FW		 9198void nf_tables_trans_destroy_flush_work(void)
9199{
9200 flush_work(&trans_destroy_work);
9201}
9202EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
9203
ed5f85d4
PNA		 9204static bool nft_expr_reduce(struct nft_regs_track *track,
9205 const struct nft_expr *expr)
9206{
9e539c5b 9207 return false;
ed5f85d4
PNA		 9208}
9209
0cbc06b3
FW		 9210static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
9211{
2c865a8a 9212 const struct nft_expr *expr, *last;
12e4ecfa 9213 struct nft_regs_track track = {};
2c865a8a
PNA		 9214 unsigned int size, data_size;
9215 void *data, *data_boundary;
9216 struct nft_rule_dp *prule;
0cbc06b3 9217 struct nft_rule *rule;
0cbc06b3
FW		 9218
9219 /* already handled or inactive chain? */
2c865a8a 9220 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 9221 return 0;
9222
63045bfd 9223 data_size = 0;
10377d42 9224 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 9225 if (nft_is_active_next(net, rule)) {
9226 data_size += sizeof(*prule) + rule->dlen;
9227 if (data_size > INT_MAX)
9228 return -ENOMEM;
9229 }
0cbc06b3
FW		 9230 }
9231
e38fbfa9 9232 chain->blob_next = nf_tables_chain_alloc_rules(chain, data_size);
2c865a8a 9233 if (!chain->blob_next)
0cbc06b3
FW		 9234 return -ENOMEM;
9235
2c865a8a
PNA		 9236 data = (void *)chain->blob_next->data;
9237 data_boundary = data + data_size;
9238 size = 0;
9239
10377d42 9240 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 9241 if (!nft_is_active_next(net, rule))
9242 continue;
9243
9244 prule = (struct nft_rule_dp *)data;
9245 data += offsetof(struct nft_rule_dp, data);
9246 if (WARN_ON_ONCE(data > data_boundary))
9247 return -ENOMEM;
9248
12e4ecfa 9249 size = 0;
fe75e84a 9250 track.last = nft_expr_last(rule);
2c865a8a 9251 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 9252 track.cur = expr;
9253
ed5f85d4 9254 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 9255 expr = track.cur;
9256 continue;
9257 }
9258
08e42a0d 9259 if (WARN_ON_ONCE(data + size + expr->ops->size > data_boundary))
2c865a8a
PNA		 9260 return -ENOMEM;
9261
9262 memcpy(data + size, expr, expr->ops->size);
9263 size += expr->ops->size;
9264 }
9265 if (WARN_ON_ONCE(size >= 1 << 12))
9266 return -ENOMEM;
9267
9268 prule->handle = rule->handle;
9269 prule->dlen = size;
9270 prule->is_last = 0;
9271
9272 data += size;
9273 size = 0;
9274 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 9275 }
9276
2c865a8a
PNA		 9277 if (WARN_ON_ONCE(data > data_boundary))
9278 return -ENOMEM;
9279
e38fbfa9
FW		 9280 prule = (struct nft_rule_dp *)data;
9281 nft_last_rule(chain, prule);
2c865a8a 9282
0cbc06b3
FW		 9283 return 0;
9284}
9285
9286static void nf_tables_commit_chain_prepare_cancel(struct net *net)
9287{
d59d2f82 9288 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 9289 struct nft_trans *trans, *next;
9290
0854db2a 9291 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 9292 struct nft_chain *chain = trans->ctx.chain;
9293
9294 if (trans->msg_type == NFT_MSG_NEWRULE ||
9295 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 9296 kvfree(chain->blob_next);
9297 chain->blob_next = NULL;
0cbc06b3
FW		 9298 }
9299 }
9300}
9301
e38fbfa9 9302static void __nf_tables_commit_chain_free_rules(struct rcu_head *h)
0cbc06b3 9303{
e38fbfa9 9304 struct nft_rule_dp_last *l = container_of(h, struct nft_rule_dp_last, h);
0cbc06b3 9305
e38fbfa9 9306 kvfree(l->blob);
0cbc06b3
FW		 9307}
9308
2c865a8a 9309static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 9310{
e38fbfa9 9311 struct nft_rule_dp_last *last;
0cbc06b3 9312
e38fbfa9
FW		 9313 /* last rule trailer is after end marker */
9314 last = (void *)blob + sizeof(*blob) + blob->size;
9315 last->blob = blob;
0cbc06b3 9316
e38fbfa9 9317 call_rcu(&last->h, __nf_tables_commit_chain_free_rules);
0cbc06b3
FW		 9318}
9319
0fb39bbe 9320static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 9321{
2c865a8a 9322 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 9323 bool next_genbit;
9324
9325 next_genbit = nft_gencursor_next(net);
9326
2c865a8a 9327 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 9328 lockdep_commit_lock_is_held(net));
2c865a8a 9329 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 9330 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 9331
9332 /* No changes to this chain? */
2c865a8a 9333 if (chain->blob_next == NULL) {
0cbc06b3
FW		 9334 /* chain had no change in last or next generation */
9335 if (g0 == g1)
9336 return;
9337 /*
9338 * chain had no change in this generation; make sure next
9339 * one uses same rules as current generation.
9340 */
9341 if (next_genbit) {
2c865a8a 9342 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 9343 nf_tables_commit_chain_free_rules_old(g1);
9344 } else {
2c865a8a 9345 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 9346 nf_tables_commit_chain_free_rules_old(g0);
9347 }
9348
9349 return;
9350 }
9351
9352 if (next_genbit)
2c865a8a 9353 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 9354 else
2c865a8a 9355 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 9356
2c865a8a 9357 chain->blob_next = NULL;
0cbc06b3
FW		 9358
9359 if (g0 == g1)
9360 return;
9361
9362 if (next_genbit)
9363 nf_tables_commit_chain_free_rules_old(g1);
9364 else
9365 nf_tables_commit_chain_free_rules_old(g0);
9366}
9367
d152159b
FW		 9368static void nft_obj_del(struct nft_object *obj)
9369{
4d44175a 9370 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 9371 list_del_rcu(&obj->list);
9372}
9373
d0e2c7de 9374void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 9375{
9376 struct nft_table *table = chain->table;
9377
9378 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
9379 nft_chain_ht_params));
9380 list_del_rcu(&chain->list);
9381}
9382
5f68718b
PNA		 9383static void nft_trans_gc_setelem_remove(struct nft_ctx *ctx,
9384 struct nft_trans_gc *trans)
9385{
9386 void **priv = trans->priv;
9387 unsigned int i;
9388
9389 for (i = 0; i < trans->count; i++) {
9390 struct nft_set_elem elem = {
9391 .priv = priv[i],
9392 };
9393
9394 nft_setelem_data_deactivate(ctx->net, trans->set, &elem);
9395 nft_setelem_remove(ctx->net, trans->set, &elem);
9396 }
9397}
9398
9399void nft_trans_gc_destroy(struct nft_trans_gc *trans)
9400{
9401 nft_set_put(trans->set);
9402 put_net(trans->net);
9403 kfree(trans);
9404}
9405
9406static void nft_trans_gc_trans_free(struct rcu_head *rcu)
9407{
9408 struct nft_set_elem elem = {};
9409 struct nft_trans_gc *trans;
9410 struct nft_ctx ctx = {};
9411 unsigned int i;
9412
9413 trans = container_of(rcu, struct nft_trans_gc, rcu);
9414 ctx.net = read_pnet(&trans->set->net);
9415
9416 for (i = 0; i < trans->count; i++) {
9417 elem.priv = trans->priv[i];
9418 if (!nft_setelem_is_catchall(trans->set, &elem))
9419 atomic_dec(&trans->set->nelems);
9420
9421 nf_tables_set_elem_destroy(&ctx, trans->set, elem.priv);
9422 }
9423
9424 nft_trans_gc_destroy(trans);
9425}
9426
9427static bool nft_trans_gc_work_done(struct nft_trans_gc *trans)
9428{
9429 struct nftables_pernet *nft_net;
9430 struct nft_ctx ctx = {};
9431
9432 nft_net = nft_pernet(trans->net);
9433
9434 mutex_lock(&nft_net->commit_mutex);
9435
9436 /* Check for race with transaction, otherwise this batch refers to
9437 * stale objects that might not be there anymore. Skip transaction if
9438 * set has been destroyed from control plane transaction in case gc
9439 * worker loses race.
9440 */
9441 if (READ_ONCE(nft_net->gc_seq) != trans->seq || trans->set->dead) {
9442 mutex_unlock(&nft_net->commit_mutex);
9443 return false;
9444 }
9445
9446 ctx.net = trans->net;
9447 ctx.table = trans->set->table;
9448
9449 nft_trans_gc_setelem_remove(&ctx, trans);
9450 mutex_unlock(&nft_net->commit_mutex);
9451
9452 return true;
9453}
9454
9455static void nft_trans_gc_work(struct work_struct *work)
9456{
9457 struct nft_trans_gc *trans, *next;
9458 LIST_HEAD(trans_gc_list);
9459
9460 spin_lock(&nf_tables_destroy_list_lock);
9461 list_splice_init(&nf_tables_gc_list, &trans_gc_list);
9462 spin_unlock(&nf_tables_destroy_list_lock);
9463
9464 list_for_each_entry_safe(trans, next, &trans_gc_list, list) {
9465 list_del(&trans->list);
9466 if (!nft_trans_gc_work_done(trans)) {
9467 nft_trans_gc_destroy(trans);
9468 continue;
9469 }
9470 call_rcu(&trans->rcu, nft_trans_gc_trans_free);
9471 }
9472}
9473
9474struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set,
9475 unsigned int gc_seq, gfp_t gfp)
9476{
9477 struct net *net = read_pnet(&set->net);
9478 struct nft_trans_gc *trans;
9479
9480 trans = kzalloc(sizeof(*trans), gfp);
9481 if (!trans)
9482 return NULL;
9483
02c6c244
PNA		 9484 trans->net = maybe_get_net(net);
9485 if (!trans->net) {
9486 kfree(trans);
9487 return NULL;
9488 }
9489
5f68718b
PNA		 9490 refcount_inc(&set->refs);
9491 trans->set = set;
5f68718b
PNA		 9492 trans->seq = gc_seq;
9493
9494 return trans;
9495}
9496
9497void nft_trans_gc_elem_add(struct nft_trans_gc *trans, void *priv)
9498{
9499 trans->priv[trans->count++] = priv;
9500}
9501
9502static void nft_trans_gc_queue_work(struct nft_trans_gc *trans)
9503{
9504 spin_lock(&nf_tables_gc_list_lock);
9505 list_add_tail(&trans->list, &nf_tables_gc_list);
9506 spin_unlock(&nf_tables_gc_list_lock);
9507
9508 schedule_work(&trans_gc_work);
9509}
9510
9511static int nft_trans_gc_space(struct nft_trans_gc *trans)
9512{
9513 return NFT_TRANS_GC_BATCHCOUNT - trans->count;
9514}
9515
9516struct nft_trans_gc *nft_trans_gc_queue_async(struct nft_trans_gc *gc,
9517 unsigned int gc_seq, gfp_t gfp)
9518{
9519 if (nft_trans_gc_space(gc))
9520 return gc;
9521
9522 nft_trans_gc_queue_work(gc);
9523
9524 return nft_trans_gc_alloc(gc->set, gc_seq, gfp);
9525}
9526
9527void nft_trans_gc_queue_async_done(struct nft_trans_gc *trans)
9528{
9529 if (trans->count == 0) {
9530 nft_trans_gc_destroy(trans);
9531 return;
9532 }
9533
9534 nft_trans_gc_queue_work(trans);
9535}
9536
9537struct nft_trans_gc *nft_trans_gc_queue_sync(struct nft_trans_gc *gc, gfp_t gfp)
9538{
9539 if (WARN_ON_ONCE(!lockdep_commit_lock_is_held(gc->net)))
9540 return NULL;
9541
9542 if (nft_trans_gc_space(gc))
9543 return gc;
9544
9545 call_rcu(&gc->rcu, nft_trans_gc_trans_free);
9546
9547 return nft_trans_gc_alloc(gc->set, 0, gfp);
9548}
9549
9550void nft_trans_gc_queue_sync_done(struct nft_trans_gc *trans)
9551{
9552 WARN_ON_ONCE(!lockdep_commit_lock_is_held(trans->net));
9553
9554 if (trans->count == 0) {
9555 nft_trans_gc_destroy(trans);
9556 return;
9557 }
9558
9559 call_rcu(&trans->rcu, nft_trans_gc_trans_free);
9560}
9561
9562struct nft_trans_gc *nft_trans_gc_catchall(struct nft_trans_gc *gc,
9563 unsigned int gc_seq)
9564{
9565 struct nft_set_elem_catchall *catchall;
9566 const struct nft_set *set = gc->set;
9567 struct nft_set_ext *ext;
9568
9569 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9570 ext = nft_set_elem_ext(set, catchall->elem);
9571
9572 if (!nft_set_elem_expired(ext))
9573 continue;
9574 if (nft_set_elem_is_dead(ext))
9575 goto dead_elem;
9576
9577 nft_set_elem_dead(ext);
9578dead_elem:
9579 gc = nft_trans_gc_queue_async(gc, gc_seq, GFP_ATOMIC);
9580 if (!gc)
9581 return NULL;
9582
9583 nft_trans_gc_elem_add(gc, catchall->elem);
9584 }
9585
9586 return gc;
9587}
9588
eb014de4
PNA		 9589static void nf_tables_module_autoload_cleanup(struct net *net)
9590{
d59d2f82 9591 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9592 struct nft_module_request *req, *next;
9593
0854db2a
FW		 9594 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
9595 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 9596 WARN_ON_ONCE(!req->done);
9597 list_del(&req->list);
9598 kfree(req);
9599 }
9600}
9601
0935d558
FW		 9602static void nf_tables_commit_release(struct net *net)
9603{
d59d2f82 9604 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 9605 struct nft_trans *trans;
9606
9607 /* all side effects have to be made visible.
9608 * For example, if a chain named 'foo' has been deleted, a
9609 * new transaction must not find it anymore.
9610 *
9611 * Memory reclaim happens asynchronously from work queue
9612 * to prevent expensive synchronize_rcu() in commit phase.
9613 */
0854db2a 9614 if (list_empty(&nft_net->commit_list)) {
eb014de4 9615 nf_tables_module_autoload_cleanup(net);
0854db2a 9616 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9617 return;
9618 }
9619
0854db2a 9620 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 9621 struct nft_trans, list);
9622 get_net(trans->ctx.net);
9623 WARN_ON_ONCE(trans->put_net);
9624
9625 trans->put_net = true;
9626 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 9627 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 9628 spin_unlock(&nf_tables_destroy_list_lock);
9629
eb014de4 9630 nf_tables_module_autoload_cleanup(net);
0935d558 9631 schedule_work(&trans_destroy_work);
ffe8923f 9632
0854db2a 9633 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9634}
9635
67cc570e
PNA		 9636static void nft_commit_notify(struct net *net, u32 portid)
9637{
d59d2f82 9638 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 9639 struct sk_buff *batch_skb = NULL, *nskb, *skb;
9640 unsigned char *data;
9641 int len;
9642
0854db2a 9643 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 9644 if (!batch_skb) {
9645new_batch:
9646 batch_skb = skb;
9647 len = NLMSG_GOODSIZE - skb->len;
9648 list_del(&skb->list);
9649 continue;
9650 }
9651 len -= skb->len;
9652 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
9653 data = skb_put(batch_skb, skb->len);
9654 memcpy(data, skb->data, skb->len);
9655 list_del(&skb->list);
9656 kfree_skb(skb);
9657 continue;
9658 }
9659 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9660 NFT_CB(batch_skb).report, GFP_KERNEL);
9661 goto new_batch;
9662 }
9663
9664 if (batch_skb) {
9665 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9666 NFT_CB(batch_skb).report, GFP_KERNEL);
9667 }
9668
0854db2a 9669 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 9670}
9671
c520292f
RGB		 9672static int nf_tables_commit_audit_alloc(struct list_head *adl,
9673 struct nft_table *table)
9674{
9675 struct nft_audit_data *adp;
9676
9677 list_for_each_entry(adp, adl, list) {
9678 if (adp->table == table)
9679 return 0;
9680 }
9681 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
9682 if (!adp)
9683 return -ENOMEM;
9684 adp->table = table;
9685 list_add(&adp->list, adl);
9686 return 0;
9687}
9688
cfbe3650
DM		 9689static void nf_tables_commit_audit_free(struct list_head *adl)
9690{
9691 struct nft_audit_data *adp, *adn;
9692
9693 list_for_each_entry_safe(adp, adn, adl, list) {
9694 list_del(&adp->list);
9695 kfree(adp);
9696 }
9697}
9698
c520292f
RGB		 9699static void nf_tables_commit_audit_collect(struct list_head *adl,
9700 struct nft_table *table, u32 op)
9701{
9702 struct nft_audit_data *adp;
9703
9704 list_for_each_entry(adp, adl, list) {
9705 if (adp->table == table)
9706 goto found;
9707 }
dadf33c9 9708 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 9709 return;
9710found:
9711 adp->entries++;
9712 if (!adp->op || adp->op > op)
9713 adp->op = op;
9714}
9715
9716#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
9717
9718static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
9719{
9720 struct nft_audit_data *adp, *adn;
9721 char aubuf[AUNFTABLENAMELEN];
9722
9723 list_for_each_entry_safe(adp, adn, adl, list) {
9724 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
9725 generation);
9726 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
9727 nft2audit_op[adp->op], GFP_KERNEL);
9728 list_del(&adp->list);
9729 kfree(adp);
9730 }
9731}
9732
212ed75d
PNA		 9733static void nft_set_commit_update(struct list_head *set_update_list)
9734{
9735 struct nft_set *set, *next;
9736
9737 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
9738 list_del_init(&set->pending_update);
9739
9740 if (!set->ops->commit)
9741 continue;
9742
9743 set->ops->commit(set);
9744 }
9745}
9746
6a33d8b7
PNA		 9747static unsigned int nft_gc_seq_begin(struct nftables_pernet *nft_net)
9748{
9749 unsigned int gc_seq;
9750
9751 /* Bump gc counter, it becomes odd, this is the busy mark. */
9752 gc_seq = READ_ONCE(nft_net->gc_seq);
9753 WRITE_ONCE(nft_net->gc_seq, ++gc_seq);
9754
9755 return gc_seq;
9756}
9757
9758static void nft_gc_seq_end(struct nftables_pernet *nft_net, unsigned int gc_seq)
9759{
9760 WRITE_ONCE(nft_net->gc_seq, ++gc_seq);
9761}
9762
5913beaf 9763static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 9764{
d59d2f82 9765 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9766 struct nft_trans *trans, *next;
5f68718b 9767 unsigned int base_seq, gc_seq;
212ed75d 9768 LIST_HEAD(set_update_list);
a3716e70 9769 struct nft_trans_elem *te;
0cbc06b3
FW		 9770 struct nft_chain *chain;
9771 struct nft_table *table;
c520292f 9772 LIST_HEAD(adl);
c9626a2c 9773 int err;
37082f93 9774
0854db2a
FW		 9775 if (list_empty(&nft_net->commit_list)) {
9776 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 9777 return 0;
9778 }
9779
938154b9
PNA		 9780 list_for_each_entry(trans, &nft_net->binding_list, binding_list) {
9781 switch (trans->msg_type) {
9782 case NFT_MSG_NEWSET:
9783 if (!nft_trans_set_update(trans) &&
9784 nft_set_is_anonymous(nft_trans_set(trans)) &&
9785 !nft_trans_set_bound(trans)) {
9786 pr_warn_once("nftables ruleset with unbound set\n");
9787 return -EINVAL;
9788 }
9789 break;
62e1e94b
PNA		 9790 case NFT_MSG_NEWCHAIN:
9791 if (!nft_trans_chain_update(trans) &&
9792 nft_chain_binding(nft_trans_chain(trans)) &&
9793 !nft_trans_chain_bound(trans)) {
9794 pr_warn_once("nftables ruleset with unbound chain\n");
9795 return -EINVAL;
9796 }
9797 break;
938154b9
PNA		 9798 }
9799 }
9800
a654de8f
PNA		 9801 /* 0. Validate ruleset, otherwise roll back for error reporting. */
9802 if (nf_tables_validate(net) < 0)
9803 return -EAGAIN;
9804
c9626a2c
PNA		 9805 err = nft_flow_rule_offload_commit(net);
9806 if (err < 0)
9807 return err;
9808
0cbc06b3 9809 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 9810 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 9811 int ret;
37082f93 9812
c520292f
RGB		 9813 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
9814 if (ret) {
9815 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9816 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 9817 return ret;
9818 }
0cbc06b3
FW		 9819 if (trans->msg_type == NFT_MSG_NEWRULE ||
9820 trans->msg_type == NFT_MSG_DELRULE) {
9821 chain = trans->ctx.chain;
9822
9823 ret = nf_tables_commit_chain_prepare(net, chain);
9824 if (ret < 0) {
9825 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9826 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 9827 return ret;
9828 }
9829 }
9830 }
37082f93 9831
0cbc06b3 9832 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 9833 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 9834 list_for_each_entry(chain, &table->chains, list)
9835 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 9836 }
9837
9838 /*
9839 * Bump generation counter, invalidate any dump in progress.
9840 * Cannot fail after this point.
37082f93 9841 */
34002783
PNA		 9842 base_seq = READ_ONCE(nft_net->base_seq);
9843 while (++base_seq == 0)
0854db2a 9844 ;
0cbc06b3 9845
34002783
PNA		 9846 WRITE_ONCE(nft_net->base_seq, base_seq);
9847
6a33d8b7 9848 gc_seq = nft_gc_seq_begin(nft_net);
5f68718b 9849
0cbc06b3
FW		 9850 /* step 3. Start new generation, rules_gen_X now in use. */
9851 net->nft.gencursor = nft_gencursor_next(net);
37082f93 9852
0854db2a 9853 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 9854 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
9855 trans->msg_type);
b380e5c7 9856 switch (trans->msg_type) {
55dd6f93
PNA		 9857 case NFT_MSG_NEWTABLE:
9858 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9859 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9860 nft_trans_destroy(trans);
9861 break;
9862 }
9863 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 9864 nf_tables_table_disable(net, trans->ctx.table);
9865
179d9ba5 9866 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 9867 } else {
f2a6d766 9868 nft_clear(net, trans->ctx.table);
55dd6f93 9869 }
35151d84 9870 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 9871 nft_trans_destroy(trans);
9872 break;
9873 case NFT_MSG_DELTABLE:
f80a612d 9874 case NFT_MSG_DESTROYTABLE:
f2a6d766 9875 list_del_rcu(&trans->ctx.table->list);
f80a612d 9876 nf_tables_table_notify(&trans->ctx, trans->msg_type);
55dd6f93 9877 break;
91c7b38d 9878 case NFT_MSG_NEWCHAIN:
9f8aac0b 9879 if (nft_trans_chain_update(trans)) {
91c7b38d 9880 nft_chain_commit_update(trans);
b9703ed4
PNA		 9881 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN,
9882 &nft_trans_chain_hooks(trans));
9883 list_splice(&nft_trans_chain_hooks(trans),
9884 &nft_trans_basechain(trans)->hook_list);
9f8aac0b
FW		 9885 /* trans destroyed after rcu grace period */
9886 } else {
66293c46 9887 nft_chain_commit_drop_policy(trans);
664b0f8c 9888 nft_clear(net, trans->ctx.chain);
b9703ed4 9889 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
9f8aac0b
FW		 9890 nft_trans_destroy(trans);
9891 }
91c7b38d
PNA		 9892 break;
9893 case NFT_MSG_DELCHAIN:
f80a612d 9894 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9895 if (nft_trans_chain_update(trans)) {
9896 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9897 &nft_trans_chain_hooks(trans));
9898 nft_netdev_unregister_hooks(net,
9899 &nft_trans_chain_hooks(trans),
9900 true);
9901 } else {
9902 nft_chain_del(trans->ctx.chain);
9903 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9904 NULL);
9905 nf_tables_unregister_hook(trans->ctx.net,
9906 trans->ctx.table,
9907 trans->ctx.chain);
9908 }
91c7b38d 9909 break;
b380e5c7 9910 case NFT_MSG_NEWRULE:
889f7ee7 9911 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 9912 nf_tables_rule_notify(&trans->ctx,
37082f93 9913 nft_trans_rule(trans),
35151d84 9914 NFT_MSG_NEWRULE);
9dd732e0
PNA		 9915 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9916 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9917
37082f93 9918 nft_trans_destroy(trans);
b380e5c7
PNA		 9919 break;
9920 case NFT_MSG_DELRULE:
f80a612d 9921 case NFT_MSG_DESTROYRULE:
b380e5c7 9922 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 9923 nf_tables_rule_notify(&trans->ctx,
9924 nft_trans_rule(trans),
f80a612d 9925 trans->msg_type);
f6ac8585
PNA		 9926 nft_rule_expr_deactivate(&trans->ctx,
9927 nft_trans_rule(trans),
9928 NFT_TRANS_COMMIT);
26b5934f
PNA		 9929
9930 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9931 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7 9932 break;
958bee14 9933 case NFT_MSG_NEWSET:
123b9961
PNA		 9934 if (nft_trans_set_update(trans)) {
9935 struct nft_set *set = nft_trans_set(trans);
4fefee57 9936
123b9961
PNA		 9937 WRITE_ONCE(set->timeout, nft_trans_set_timeout(trans));
9938 WRITE_ONCE(set->gc_int, nft_trans_set_gc_int(trans));
96b2ef9b
FW		 9939
9940 if (nft_trans_set_size(trans))
9941 WRITE_ONCE(set->size, nft_trans_set_size(trans));
123b9961
PNA		 9942 } else {
9943 nft_clear(net, nft_trans_set(trans));
9944 /* This avoids hitting -EBUSY when deleting the table
9945 * from the transaction.
9946 */
9947 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
9948 !list_empty(&nft_trans_set(trans)->bindings))
1689f259 9949 nft_use_dec(&trans->ctx.table->use);
123b9961 9950 }
958bee14 9951 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 9952 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 9953 nft_trans_destroy(trans);
9954 break;
9955 case NFT_MSG_DELSET:
f80a612d 9956 case NFT_MSG_DESTROYSET:
5f68718b 9957 nft_trans_set(trans)->dead = 1;
37a9cc52 9958 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 9959 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
f80a612d 9960 trans->msg_type, GFP_KERNEL);
958bee14 9961 break;
60319eb1 9962 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 9963 te = (struct nft_trans_elem *)trans->data;
9964
aaa31047 9965 nft_setelem_activate(net, te->set, &te->elem);
cc02e457
PM		 9966 nf_tables_setelem_notify(&trans->ctx, te->set,
9967 &te->elem,
6fb721cf 9968 NFT_MSG_NEWSETELEM);
212ed75d
PNA		 9969 if (te->set->ops->commit &&
9970 list_empty(&te->set->pending_update)) {
9971 list_add_tail(&te->set->pending_update,
9972 &set_update_list);
9973 }
60319eb1
PNA		 9974 nft_trans_destroy(trans);
9975 break;
9976 case NFT_MSG_DELSETELEM:
f80a612d 9977 case NFT_MSG_DESTROYSETELEM:
a3716e70 9978 te = (struct nft_trans_elem *)trans->data;
fe2811eb 9979
a3716e70
PNA		 9980 nf_tables_setelem_notify(&trans->ctx, te->set,
9981 &te->elem,
f80a612d 9982 trans->msg_type);
aaa31047
PNA		 9983 nft_setelem_remove(net, te->set, &te->elem);
9984 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9985 atomic_dec(&te->set->nelems);
9986 te->set->ndeact--;
9987 }
212ed75d
PNA		 9988 if (te->set->ops->commit &&
9989 list_empty(&te->set->pending_update)) {
9990 list_add_tail(&te->set->pending_update,
9991 &set_update_list);
9992 }
60319eb1 9993 break;
e5009240 9994 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 9995 if (nft_trans_obj_update(trans)) {
9996 nft_obj_commit_update(trans);
9997 nf_tables_obj_notify(&trans->ctx,
9998 nft_trans_obj(trans),
9999 NFT_MSG_NEWOBJ);
10000 } else {
10001 nft_clear(net, nft_trans_obj(trans));
10002 nf_tables_obj_notify(&trans->ctx,
10003 nft_trans_obj(trans),
10004 NFT_MSG_NEWOBJ);
10005 nft_trans_destroy(trans);
10006 }
e5009240
PNA		 10007 break;
10008 case NFT_MSG_DELOBJ:
f80a612d 10009 case NFT_MSG_DESTROYOBJ:
d152159b 10010 nft_obj_del(nft_trans_obj(trans));
e5009240 10011 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
f80a612d 10012 trans->msg_type);
e5009240 10013 break;
3b49e2e9 10014 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 10015 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 10016 nft_trans_flowtable(trans)->data.flags =
10017 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 10018 nf_tables_flowtable_notify(&trans->ctx,
10019 nft_trans_flowtable(trans),
10020 &nft_trans_flowtable_hooks(trans),
10021 NFT_MSG_NEWFLOWTABLE);
10022 list_splice(&nft_trans_flowtable_hooks(trans),
10023 &nft_trans_flowtable(trans)->hook_list);
10024 } else {
10025 nft_clear(net, nft_trans_flowtable(trans));
10026 nf_tables_flowtable_notify(&trans->ctx,
10027 nft_trans_flowtable(trans),
28339b21 10028 NULL,
78d9f48f
PNA		 10029 NFT_MSG_NEWFLOWTABLE);
10030 }
3b49e2e9
PNA		 10031 nft_trans_destroy(trans);
10032 break;
10033 case NFT_MSG_DELFLOWTABLE:
f80a612d 10034 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 10035 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 10036 nf_tables_flowtable_notify(&trans->ctx,
10037 nft_trans_flowtable(trans),
10038 &nft_trans_flowtable_hooks(trans),
f80a612d 10039 trans->msg_type);
abadb2f8
PNA		 10040 nft_unregister_flowtable_net_hooks(net,
10041 &nft_trans_flowtable_hooks(trans));
10042 } else {
10043 list_del_rcu(&nft_trans_flowtable(trans)->list);
10044 nf_tables_flowtable_notify(&trans->ctx,
10045 nft_trans_flowtable(trans),
28339b21 10046 NULL,
f80a612d 10047 trans->msg_type);
abadb2f8
PNA		 10048 nft_unregister_flowtable_net_hooks(net,
10049 &nft_trans_flowtable(trans)->hook_list);
10050 }
3b49e2e9 10051 break;
37082f93 10052 }
37082f93
PNA		 10053 }
10054
212ed75d
PNA		 10055 nft_set_commit_update(&set_update_list);
10056
67cc570e 10057 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 10058 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 10059 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
5f68718b 10060
6a33d8b7 10061 nft_gc_seq_end(nft_net, gc_seq);
0935d558 10062 nf_tables_commit_release(net);
37082f93
PNA		 10063
10064 return 0;
10065}
10066
eb014de4
PNA		 10067static void nf_tables_module_autoload(struct net *net)
10068{
d59d2f82 10069 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 10070 struct nft_module_request *req, *next;
10071 LIST_HEAD(module_list);
10072
0854db2a
FW		 10073 list_splice_init(&nft_net->module_list, &module_list);
10074 mutex_unlock(&nft_net->commit_mutex);
eb014de4 10075 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 10076 request_module("%s", req->module);
10077 req->done = true;
eb014de4 10078 }
0854db2a
FW		 10079 mutex_lock(&nft_net->commit_mutex);
10080 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 10081}
10082
b326dd37 10083static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 10084{
c7c32e72
PNA		 10085 switch (trans->msg_type) {
10086 case NFT_MSG_NEWTABLE:
10087 nf_tables_table_destroy(&trans->ctx);
10088 break;
10089 case NFT_MSG_NEWCHAIN:
b9703ed4
PNA		 10090 if (nft_trans_chain_update(trans))
10091 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
10092 else
10093 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 10094 break;
10095 case NFT_MSG_NEWRULE:
10096 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
10097 break;
10098 case NFT_MSG_NEWSET:
0c2a85ed 10099 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 10100 break;
61edafbb
PM		 10101 case NFT_MSG_NEWSETELEM:
10102 nft_set_elem_destroy(nft_trans_elem_set(trans),
61f9e292 10103 nft_trans_elem(trans).priv, true);
61edafbb 10104 break;
e5009240 10105 case NFT_MSG_NEWOBJ:
00bfb320 10106 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 10107 break;
3b49e2e9 10108 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 10109 if (nft_trans_flowtable_update(trans))
cdc32546 10110 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
78d9f48f
PNA		 10111 else
10112 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 10113 break;
c7c32e72
PNA		 10114 }
10115 kfree(trans);
10116}
10117
212ed75d
PNA		 10118static void nft_set_abort_update(struct list_head *set_update_list)
10119{
10120 struct nft_set *set, *next;
10121
10122 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
10123 list_del_init(&set->pending_update);
10124
10125 if (!set->ops->abort)
10126 continue;
10127
10128 set->ops->abort(set);
10129 }
10130}
10131
c0391b6a 10132static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 10133{
d59d2f82 10134 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 10135 struct nft_trans *trans, *next;
212ed75d 10136 LIST_HEAD(set_update_list);
02263db0 10137 struct nft_trans_elem *te;
37082f93 10138
c0391b6a
PNA		 10139 if (action == NFNL_ABORT_VALIDATE &&
10140 nf_tables_validate(net) < 0)
10141 return -EAGAIN;
10142
0854db2a 10143 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 10144 list) {
b380e5c7 10145 switch (trans->msg_type) {
55dd6f93
PNA		 10146 case NFT_MSG_NEWTABLE:
10147 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 10148 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
10149 nft_trans_destroy(trans);
10150 break;
10151 }
10152 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 10153 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 10154 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
10155 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
10156 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
10157 }
10158 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 10159 nft_trans_destroy(trans);
10160 } else {
e688a7f8 10161 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 10162 }
10163 break;
10164 case NFT_MSG_DELTABLE:
f80a612d 10165 case NFT_MSG_DESTROYTABLE:
f2a6d766 10166 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 10167 nft_trans_destroy(trans);
10168 break;
91c7b38d
PNA		 10169 case NFT_MSG_NEWCHAIN:
10170 if (nft_trans_chain_update(trans)) {
b9703ed4
PNA		 10171 nft_netdev_unregister_hooks(net,
10172 &nft_trans_chain_hooks(trans),
10173 true);
982f4051 10174 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 10175 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 10176 nft_trans_destroy(trans);
10177 } else {
4bedf9ee 10178 if (nft_trans_chain_bound(trans)) {
d0e2c7de
PNA		 10179 nft_trans_destroy(trans);
10180 break;
10181 }
1689f259 10182 nft_use_dec_restore(&trans->ctx.table->use);
1b2470e5 10183 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 10184 nf_tables_unregister_hook(trans->ctx.net,
10185 trans->ctx.table,
10186 trans->ctx.chain);
91c7b38d
PNA		 10187 }
10188 break;
10189 case NFT_MSG_DELCHAIN:
f80a612d 10190 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 10191 if (nft_trans_chain_update(trans)) {
10192 list_splice(&nft_trans_chain_hooks(trans),
10193 &nft_trans_basechain(trans)->hook_list);
10194 } else {
1689f259 10195 nft_use_inc_restore(&trans->ctx.table->use);
7d937b10
PNA		 10196 nft_clear(trans->ctx.net, trans->ctx.chain);
10197 }
91c7b38d
PNA		 10198 nft_trans_destroy(trans);
10199 break;
b380e5c7 10200 case NFT_MSG_NEWRULE:
4bedf9ee
PNA		 10201 if (nft_trans_rule_bound(trans)) {
10202 nft_trans_destroy(trans);
10203 break;
10204 }
1689f259 10205 nft_use_dec_restore(&trans->ctx.chain->use);
b380e5c7 10206 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 10207 nft_rule_expr_deactivate(&trans->ctx,
10208 nft_trans_rule(trans),
10209 NFT_TRANS_ABORT);
3c5e4462
PNA		 10210 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10211 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 10212 break;
10213 case NFT_MSG_DELRULE:
f80a612d 10214 case NFT_MSG_DESTROYRULE:
1689f259 10215 nft_use_inc_restore(&trans->ctx.chain->use);
889f7ee7 10216 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 10217 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 10218 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10219 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10220
37082f93 10221 nft_trans_destroy(trans);
b380e5c7 10222 break;
958bee14 10223 case NFT_MSG_NEWSET:
123b9961
PNA		 10224 if (nft_trans_set_update(trans)) {
10225 nft_trans_destroy(trans);
10226 break;
10227 }
1689f259 10228 nft_use_dec_restore(&trans->ctx.table->use);
6a0a8d10 10229 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 10230 nft_trans_destroy(trans);
10231 break;
10232 }
10233 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 10234 break;
10235 case NFT_MSG_DELSET:
f80a612d 10236 case NFT_MSG_DESTROYSET:
1689f259 10237 nft_use_inc_restore(&trans->ctx.table->use);
37a9cc52 10238 nft_clear(trans->ctx.net, nft_trans_set(trans));
628bd3e4
PNA		 10239 if (nft_trans_set(trans)->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
10240 nft_map_activate(&trans->ctx, nft_trans_set(trans));
10241
958bee14
PNA		 10242 nft_trans_destroy(trans);
10243 break;
60319eb1 10244 case NFT_MSG_NEWSETELEM:
6a0a8d10 10245 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 10246 nft_trans_destroy(trans);
10247 break;
10248 }
02263db0 10249 te = (struct nft_trans_elem *)trans->data;
aaa31047
PNA		 10250 nft_setelem_remove(net, te->set, &te->elem);
10251 if (!nft_setelem_is_catchall(te->set, &te->elem))
10252 atomic_dec(&te->set->nelems);
212ed75d
PNA		 10253
10254 if (te->set->ops->abort &&
10255 list_empty(&te->set->pending_update)) {
10256 list_add_tail(&te->set->pending_update,
10257 &set_update_list);
10258 }
60319eb1
PNA		 10259 break;
10260 case NFT_MSG_DELSETELEM:
f80a612d 10261 case NFT_MSG_DESTROYSETELEM:
cc02e457
PM		 10262 te = (struct nft_trans_elem *)trans->data;
10263
f8bb7889 10264 nft_setelem_data_activate(net, te->set, &te->elem);
aaa31047
PNA		 10265 nft_setelem_activate(net, te->set, &te->elem);
10266 if (!nft_setelem_is_catchall(te->set, &te->elem))
10267 te->set->ndeact--;
cc02e457 10268
212ed75d
PNA		 10269 if (te->set->ops->abort &&
10270 list_empty(&te->set->pending_update)) {
10271 list_add_tail(&te->set->pending_update,
10272 &set_update_list);
10273 }
e5009240
PNA		 10274 nft_trans_destroy(trans);
10275 break;
10276 case NFT_MSG_NEWOBJ:
d62d0ba9 10277 if (nft_trans_obj_update(trans)) {
dad3bdee 10278 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 10279 nft_trans_destroy(trans);
10280 } else {
1689f259 10281 nft_use_dec_restore(&trans->ctx.table->use);
d62d0ba9
FFM		 10282 nft_obj_del(nft_trans_obj(trans));
10283 }
e5009240
PNA		 10284 break;
10285 case NFT_MSG_DELOBJ:
f80a612d 10286 case NFT_MSG_DESTROYOBJ:
1689f259 10287 nft_use_inc_restore(&trans->ctx.table->use);
e5009240 10288 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 10289 nft_trans_destroy(trans);
10290 break;
3b49e2e9 10291 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 10292 if (nft_trans_flowtable_update(trans)) {
10293 nft_unregister_flowtable_net_hooks(net,
10294 &nft_trans_flowtable_hooks(trans));
10295 } else {
1689f259 10296 nft_use_dec_restore(&trans->ctx.table->use);
78d9f48f
PNA		 10297 list_del_rcu(&nft_trans_flowtable(trans)->list);
10298 nft_unregister_flowtable_net_hooks(net,
10299 &nft_trans_flowtable(trans)->hook_list);
10300 }
3b49e2e9
PNA		 10301 break;
10302 case NFT_MSG_DELFLOWTABLE:
f80a612d 10303 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 10304 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 10305 list_splice(&nft_trans_flowtable_hooks(trans),
10306 &nft_trans_flowtable(trans)->hook_list);
abadb2f8 10307 } else {
1689f259 10308 nft_use_inc_restore(&trans->ctx.table->use);
abadb2f8
PNA		 10309 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
10310 }
3b49e2e9
PNA		 10311 nft_trans_destroy(trans);
10312 break;
37082f93 10313 }
37082f93
PNA		 10314 }
10315
212ed75d
PNA		 10316 nft_set_abort_update(&set_update_list);
10317
b326dd37
PNA		 10318 synchronize_rcu();
10319
a1cee076 10320 list_for_each_entry_safe_reverse(trans, next,
0854db2a 10321 &nft_net->commit_list, list) {
938154b9 10322 nft_trans_list_del(trans);
b326dd37 10323 nf_tables_abort_release(trans);
37082f93
PNA		 10324 }
10325
c0391b6a 10326 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 10327 nf_tables_module_autoload(net);
10328 else
10329 nf_tables_module_autoload_cleanup(net);
10330
37082f93
PNA		 10331 return 0;
10332}
10333
c0391b6a
PNA		 10334static int nf_tables_abort(struct net *net, struct sk_buff *skb,
10335 enum nfnl_abort_action action)
71ad00c5 10336{
d59d2f82 10337 struct nftables_pernet *nft_net = nft_pernet(net);
c0391b6a 10338 int ret = __nf_tables_abort(net, action);
f102d66b 10339
0854db2a 10340 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 10341
10342 return ret;
71ad00c5
FW		 10343}
10344
74e8bcd2
PNA		 10345static bool nf_tables_valid_genid(struct net *net, u32 genid)
10346{
d59d2f82 10347 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 10348 bool genid_ok;
10349
0854db2a 10350 mutex_lock(&nft_net->commit_mutex);
f102d66b 10351
0854db2a 10352 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 10353 if (!genid_ok)
0854db2a 10354 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 10355
10356 /* else, commit mutex has to be released by commit or abort function */
10357 return genid_ok;
74e8bcd2
PNA		 10358}
10359
96518518
PM		 10360static const struct nfnetlink_subsystem nf_tables_subsys = {
10361 .name = "nf_tables",
10362 .subsys_id = NFNL_SUBSYS_NFTABLES,
10363 .cb_count = NFT_MSG_MAX,
10364 .cb = nf_tables_cb,
0628b123
PNA		 10365 .commit = nf_tables_commit,
10366 .abort = nf_tables_abort,
74e8bcd2 10367 .valid_genid = nf_tables_valid_genid,
be2ab5b4 10368 .owner = THIS_MODULE,
96518518
PM		 10369};
10370
7210e4e3 10371int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 10372 enum nft_chain_types type)
7210e4e3
PNA		 10373{
10374 const struct nft_base_chain *basechain;
10375
f323d954 10376 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 10377 basechain = nft_base_chain(chain);
10378 if (basechain->type->type != type)
10379 return -EOPNOTSUPP;
10380 }
10381 return 0;
10382}
10383EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
10384
75e8d06d
PNA		 10385int nft_chain_validate_hooks(const struct nft_chain *chain,
10386 unsigned int hook_flags)
10387{
10388 struct nft_base_chain *basechain;
10389
f323d954 10390 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 10391 basechain = nft_base_chain(chain);
10392
c974a3a3 10393 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 10394 return 0;
10395
10396 return -EOPNOTSUPP;
10397 }
10398
10399 return 0;
10400}
10401EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
10402
20a69341
PM		 10403/*
10404 * Loop detection - walk through the ruleset beginning at the destination chain
10405 * of a new jump until either the source chain is reached (loop) or all
10406 * reachable chains have been traversed.
10407 *
10408 * The loop check is performed whenever a new jump verdict is added to an
10409 * expression or verdict map or a verdict map is bound to a new chain.
10410 */
10411
10412static int nf_tables_check_loops(const struct nft_ctx *ctx,
10413 const struct nft_chain *chain);
10414
6387aa6e
PNA		 10415static int nft_check_loops(const struct nft_ctx *ctx,
10416 const struct nft_set_ext *ext)
10417{
10418 const struct nft_data *data;
10419 int ret;
10420
10421 data = nft_set_ext_data(ext);
10422 switch (data->verdict.code) {
10423 case NFT_JUMP:
10424 case NFT_GOTO:
10425 ret = nf_tables_check_loops(ctx, data->verdict.chain);
10426 break;
10427 default:
10428 ret = 0;
10429 break;
10430 }
10431
10432 return ret;
10433}
10434
20a69341 10435static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 10436 struct nft_set *set,
20a69341 10437 const struct nft_set_iter *iter,
de70185d 10438 struct nft_set_elem *elem)
20a69341 10439{
fe2811eb 10440 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
fe2811eb
PM		 10441
10442 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
10443 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 10444 return 0;
10445
6387aa6e 10446 return nft_check_loops(ctx, ext);
20a69341
PM		 10447}
10448
aaa31047
PNA		 10449static int nft_set_catchall_loops(const struct nft_ctx *ctx,
10450 struct nft_set *set)
10451{
10452 u8 genmask = nft_genmask_next(ctx->net);
10453 struct nft_set_elem_catchall *catchall;
10454 struct nft_set_ext *ext;
10455 int ret = 0;
10456
10457 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
10458 ext = nft_set_elem_ext(set, catchall->elem);
10459 if (!nft_set_elem_active(ext, genmask))
10460 continue;
10461
10462 ret = nft_check_loops(ctx, ext);
10463 if (ret < 0)
10464 return ret;
10465 }
10466
10467 return ret;
10468}
10469
20a69341
PM		 10470static int nf_tables_check_loops(const struct nft_ctx *ctx,
10471 const struct nft_chain *chain)
10472{
10473 const struct nft_rule *rule;
10474 const struct nft_expr *expr, *last;
de70185d 10475 struct nft_set *set;
20a69341
PM		 10476 struct nft_set_binding *binding;
10477 struct nft_set_iter iter;
20a69341
PM		 10478
10479 if (ctx->chain == chain)
10480 return -ELOOP;
10481
10482 list_for_each_entry(rule, &chain->rules, list) {
10483 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 10484 struct nft_immediate_expr *priv;
10485 const struct nft_data *data;
0ca743a5
PNA		 10486 int err;
10487
a654de8f 10488 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 10489 continue;
10490
a654de8f
PNA		 10491 priv = nft_expr_priv(expr);
10492 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 10493 continue;
20a69341 10494
a654de8f 10495 data = &priv->data;
1ca2e170 10496 switch (data->verdict.code) {
20a69341
PM		 10497 case NFT_JUMP:
10498 case NFT_GOTO:
1ca2e170
PM		 10499 err = nf_tables_check_loops(ctx,
10500 data->verdict.chain);
20a69341
PM		 10501 if (err < 0)
10502 return err;
c2168e6b 10503 break;
20a69341
PM		 10504 default:
10505 break;
10506 }
10507 }
10508 }
10509
10510 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 10511 if (!nft_is_active_next(ctx->net, set))
10512 continue;
20a69341
PM		 10513 if (!(set->flags & NFT_SET_MAP) ||
10514 set->dtype != NFT_DATA_VERDICT)
10515 continue;
10516
10517 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 10518 if (!(binding->flags & NFT_SET_MAP) ||
10519 binding->chain != chain)
20a69341
PM		 10520 continue;
10521
8588ac09 10522 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 10523 iter.skip = 0;
10524 iter.count = 0;
10525 iter.err = 0;
10526 iter.fn = nf_tables_loop_check_setelem;
10527
10528 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 10529 if (!iter.err)
10530 iter.err = nft_set_catchall_loops(ctx, set);
10531
20a69341
PM		 10532 if (iter.err < 0)
10533 return iter.err;
10534 }
10535 }
10536
10537 return 0;
10538}
10539
36b701fa
LGL		 10540/**
10541 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
10542 *
10543 * @attr: netlink attribute to fetch value from
10544 * @max: maximum value to be stored in dest
10545 * @dest: pointer to the variable
10546 *
10547 * Parse, check and store a given u32 netlink attribute into variable.
10548 * This function returns -ERANGE if the value goes over maximum value.
10549 * Otherwise a 0 is returned and the attribute value is stored in the
10550 * destination variable.
10551 */
f1d505bb 10552int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 10553{
09525a09 10554 u32 val;
36b701fa
LGL		 10555
10556 val = ntohl(nla_get_be32(attr));
10557 if (val > max)
10558 return -ERANGE;
10559
10560 *dest = val;
10561 return 0;
10562}
10563EXPORT_SYMBOL_GPL(nft_parse_u32_check);
10564
6c6f9f31 10565static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 10566{
49499c3e
PM		 10567 unsigned int reg;
10568
10569 reg = ntohl(nla_get_be32(attr));
10570 switch (reg) {
10571 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 10572 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
10573 break;
10574 case NFT_REG32_00...NFT_REG32_15:
10575 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
10576 break;
49499c3e 10577 default:
6e1acfa3 10578 return -ERANGE;
49499c3e 10579 }
6e1acfa3
PNA		 10580
10581 return 0;
b1c96ed3 10582}
b1c96ed3 10583
49499c3e
PM		 10584/**
10585 * nft_dump_register - dump a register value to a netlink attribute
10586 *
10587 * @skb: socket buffer
10588 * @attr: attribute number
10589 * @reg: register number
10590 *
10591 * Construct a netlink attribute containing the register number. For
10592 * compatibility reasons, register numbers being a multiple of 4 are
10593 * translated to the corresponding 128 bit register numbers.
10594 */
b1c96ed3
PM		 10595int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
10596{
49499c3e
PM		 10597 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
10598 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
10599 else
10600 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
10601
b1c96ed3
PM		 10602 return nla_put_be32(skb, attr, htonl(reg));
10603}
10604EXPORT_SYMBOL_GPL(nft_dump_register);
10605
4f16d25c 10606static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 10607{
49499c3e 10608 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 10609 return -EINVAL;
d07db988
PM		 10610 if (len == 0)
10611 return -EINVAL;
c593642c 10612 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 10613 return -ERANGE;
49499c3e 10614
96518518
PM		 10615 return 0;
10616}
4f16d25c
PNA		 10617
10618int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
10619{
10620 u32 reg;
10621 int err;
10622
6e1acfa3
PNA		 10623 err = nft_parse_register(attr, &reg);
10624 if (err < 0)
10625 return err;
10626
4f16d25c
PNA		 10627 err = nft_validate_register_load(reg, len);
10628 if (err < 0)
10629 return err;
10630
10631 *sreg = reg;
10632 return 0;
10633}
10634EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 10635
345023b0
PNA		 10636static int nft_validate_register_store(const struct nft_ctx *ctx,
10637 enum nft_registers reg,
10638 const struct nft_data *data,
10639 enum nft_data_types type,
10640 unsigned int len)
96518518 10641{
20a69341
PM		 10642 int err;
10643
96518518
PM		 10644 switch (reg) {
10645 case NFT_REG_VERDICT:
58f40ab6 10646 if (type != NFT_DATA_VERDICT)
96518518 10647 return -EINVAL;
20a69341 10648
58f40ab6 10649 if (data != NULL &&
1ca2e170
PM		 10650 (data->verdict.code == NFT_GOTO ||
10651 data->verdict.code == NFT_JUMP)) {
10652 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 10653 if (err < 0)
10654 return err;
20a69341
PM		 10655 }
10656
96518518
PM		 10657 return 0;
10658 default:
49499c3e 10659 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 10660 return -EINVAL;
45d9bcda
PM		 10661 if (len == 0)
10662 return -EINVAL;
49499c3e 10663 if (reg * NFT_REG32_SIZE + len >
c593642c 10664 sizeof_field(struct nft_regs, data))
45d9bcda 10665 return -ERANGE;
27e6d201 10666
96518518
PM		 10667 if (data != NULL && type != NFT_DATA_VALUE)
10668 return -EINVAL;
10669 return 0;
10670 }
10671}
345023b0
PNA		 10672
10673int nft_parse_register_store(const struct nft_ctx *ctx,
10674 const struct nlattr *attr, u8 *dreg,
10675 const struct nft_data *data,
10676 enum nft_data_types type, unsigned int len)
10677{
10678 int err;
10679 u32 reg;
10680
6e1acfa3
PNA		 10681 err = nft_parse_register(attr, &reg);
10682 if (err < 0)
10683 return err;
10684
345023b0
PNA		 10685 err = nft_validate_register_store(ctx, reg, data, type, len);
10686 if (err < 0)
10687 return err;
10688
10689 *dreg = reg;
10690 return 0;
10691}
10692EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 10693
10694static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
10695 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
10696 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
10697 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 10698 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 10699};
10700
10701static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
10702 struct nft_data_desc *desc, const struct nlattr *nla)
10703{
664b0f8c 10704 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 10705 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
10706 struct nft_chain *chain;
10707 int err;
10708
8cb08174
JB		 10709 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
10710 nft_verdict_policy, NULL);
96518518
PM		 10711 if (err < 0)
10712 return err;
10713
10714 if (!tb[NFTA_VERDICT_CODE])
10715 return -EINVAL;
ddbd8be6
FW		 10716
10717 /* zero padding hole for memcmp */
10718 memset(data, 0, sizeof(*data));
1ca2e170 10719 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 10720
1ca2e170 10721 switch (data->verdict.code) {
e0abdadc 10722 default:
1ca2e170 10723 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 10724 case NF_ACCEPT:
10725 case NF_DROP:
10726 case NF_QUEUE:
10727 break;
10728 default:
10729 return -EINVAL;
10730 }
954d8297 10731 fallthrough;
96518518
PM		 10732 case NFT_CONTINUE:
10733 case NFT_BREAK:
10734 case NFT_RETURN:
96518518
PM		 10735 break;
10736 case NFT_JUMP:
10737 case NFT_GOTO:
51d70f18
PNA		 10738 if (tb[NFTA_VERDICT_CHAIN]) {
10739 chain = nft_chain_lookup(ctx->net, ctx->table,
10740 tb[NFTA_VERDICT_CHAIN],
10741 genmask);
10742 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 10743 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
515ad530
TLSC		 10744 tb[NFTA_VERDICT_CHAIN_ID],
10745 genmask);
51d70f18
PNA		 10746 if (IS_ERR(chain))
10747 return PTR_ERR(chain);
10748 } else {
96518518 10749 return -EINVAL;
51d70f18
PNA		 10750 }
10751
96518518
PM		 10752 if (IS_ERR(chain))
10753 return PTR_ERR(chain);
f323d954 10754 if (nft_is_base_chain(chain))
96518518 10755 return -EOPNOTSUPP;
e02f0d39
PNA		 10756 if (nft_chain_is_bound(chain))
10757 return -EINVAL;
f323ef3a
PNA		 10758 if (desc->flags & NFT_DATA_DESC_SETELEM &&
10759 chain->flags & NFT_CHAIN_BINDING)
10760 return -EINVAL;
1689f259
PNA		 10761 if (!nft_use_inc(&chain->use))
10762 return -EMFILE;
96518518 10763
1ca2e170 10764 data->verdict.chain = chain;
96518518 10765 break;
96518518
PM		 10766 }
10767
4c4ed074 10768 desc->len = sizeof(data->verdict);
341b6941 10769
96518518
PM		 10770 return 0;
10771}
10772
10773static void nft_verdict_uninit(const struct nft_data *data)
10774{
d0e2c7de 10775 struct nft_chain *chain;
d0e2c7de 10776
1ca2e170 10777 switch (data->verdict.code) {
96518518
PM		 10778 case NFT_JUMP:
10779 case NFT_GOTO:
d0e2c7de 10780 chain = data->verdict.chain;
1689f259 10781 nft_use_dec(&chain->use);
96518518
PM		 10782 break;
10783 }
10784}
10785
33d5a7b1 10786int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 10787{
10788 struct nlattr *nest;
10789
ae0be8de 10790 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 10791 if (!nest)
10792 goto nla_put_failure;
10793
33d5a7b1 10794 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 10795 goto nla_put_failure;
10796
33d5a7b1 10797 switch (v->code) {
96518518
PM		 10798 case NFT_JUMP:
10799 case NFT_GOTO:
1ca2e170 10800 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 10801 v->chain->name))
96518518
PM		 10802 goto nla_put_failure;
10803 }
10804 nla_nest_end(skb, nest);
10805 return 0;
10806
10807nla_put_failure:
10808 return -1;
10809}
10810
d0a11fc3 10811static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 10812 struct nft_data *data, struct nft_data_desc *desc,
10813 const struct nlattr *nla)
96518518
PM		 10814{
10815 unsigned int len;
10816
10817 len = nla_len(nla);
10818 if (len == 0)
10819 return -EINVAL;
341b6941 10820 if (len > desc->size)
96518518 10821 return -EOVERFLOW;
341b6941
PNA		 10822 if (desc->len) {
10823 if (len != desc->len)
10824 return -EINVAL;
10825 } else {
10826 desc->len = len;
10827 }
96518518 10828
d0a11fc3 10829 nla_memcpy(data->data, nla, len);
341b6941 10830
96518518
PM		 10831 return 0;
10832}
10833
10834static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
10835 unsigned int len)
10836{
10837 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
10838}
10839
10840static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 10841 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 10842 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
10843};
10844
10845/**
10846 * nft_data_init - parse nf_tables data netlink attributes
10847 *
10848 * @ctx: context of the expression using the data
10849 * @data: destination struct nft_data
10850 * @desc: data description
10851 * @nla: netlink attribute containing data
10852 *
10853 * Parse the netlink data attributes and initialize a struct nft_data.
10854 * The type and length of data are returned in the data description.
10855 *
10856 * The caller can indicate that it only wants to accept data of type
10857 * NFT_DATA_VALUE by passing NULL for the ctx argument.
10858 */
341b6941 10859int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 10860 struct nft_data_desc *desc, const struct nlattr *nla)
10861{
10862 struct nlattr *tb[NFTA_DATA_MAX + 1];
10863 int err;
10864
341b6941
PNA		 10865 if (WARN_ON_ONCE(!desc->size))
10866 return -EINVAL;
10867
8cb08174
JB		 10868 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
10869 nft_data_policy, NULL);
96518518
PM		 10870 if (err < 0)
10871 return err;
10872
341b6941
PNA		 10873 if (tb[NFTA_DATA_VALUE]) {
10874 if (desc->type != NFT_DATA_VALUE)
10875 return -EINVAL;
10876
10877 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
10878 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
10879 if (desc->type != NFT_DATA_VERDICT)
10880 return -EINVAL;
10881
10882 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
10883 } else {
10884 err = -EINVAL;
10885 }
10886
10887 return err;
96518518
PM		 10888}
10889EXPORT_SYMBOL_GPL(nft_data_init);
10890
10891/**
59105446 10892 * nft_data_release - release a nft_data item
96518518
PM		 10893 *
10894 * @data: struct nft_data to release
10895 * @type: type of data
10896 *
10897 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
10898 * all others need to be released by calling this function.
10899 */
59105446 10900void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 10901{
960bd2c2 10902 if (type < NFT_DATA_VERDICT)
96518518 10903 return;
960bd2c2 10904 switch (type) {
96518518
PM		 10905 case NFT_DATA_VERDICT:
10906 return nft_verdict_uninit(data);
10907 default:
10908 WARN_ON(1);
10909 }
10910}
59105446 10911EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 10912
10913int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
10914 enum nft_data_types type, unsigned int len)
10915{
10916 struct nlattr *nest;
10917 int err;
10918
ae0be8de 10919 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 10920 if (nest == NULL)
10921 return -1;
10922
10923 switch (type) {
10924 case NFT_DATA_VALUE:
10925 err = nft_value_dump(skb, data, len);
10926 break;
10927 case NFT_DATA_VERDICT:
33d5a7b1 10928 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 10929 break;
10930 default:
10931 err = -EINVAL;
10932 WARN_ON(1);
10933 }
10934
10935 nla_nest_end(skb, nest);
10936 return err;
10937}
10938EXPORT_SYMBOL_GPL(nft_data_dump);
10939
5ebe0b0e
PNA		 10940int __nft_release_basechain(struct nft_ctx *ctx)
10941{
10942 struct nft_rule *rule, *nr;
10943
fa5950e4
FW		 10944 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
10945 return 0;
5ebe0b0e 10946
c974a3a3 10947 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 10948 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
10949 list_del(&rule->list);
1689f259 10950 nft_use_dec(&ctx->chain->use);
bb7b40ae 10951 nf_tables_rule_release(ctx, rule);
5ebe0b0e 10952 }
1b2470e5 10953 nft_chain_del(ctx->chain);
1689f259 10954 nft_use_dec(&ctx->table->use);
43a605f2 10955 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 10956
10957 return 0;
10958}
10959EXPORT_SYMBOL_GPL(__nft_release_basechain);
10960
00dfe9be
PNA		 10961static void __nft_release_hook(struct net *net, struct nft_table *table)
10962{
6069da44 10963 struct nft_flowtable *flowtable;
00dfe9be
PNA		 10964 struct nft_chain *chain;
10965
10966 list_for_each_entry(chain, &table->chains, list)
f9a43007 10967 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 10968 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 10969 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
10970 true);
00dfe9be
PNA		 10971}
10972
767d1216
PNA		 10973static void __nft_release_hooks(struct net *net)
10974{
d59d2f82 10975 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 10976 struct nft_table *table;
767d1216 10977
0854db2a 10978 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 10979 if (nft_table_has_owner(table))
10980 continue;
10981
00dfe9be 10982 __nft_release_hook(net, table);
2888b080 10983 }
767d1216
PNA		 10984}
10985
fd020332 10986static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 10987{
3b49e2e9 10988 struct nft_flowtable *flowtable, *nf;
df05ef87 10989 struct nft_chain *chain, *nc;
e5009240 10990 struct nft_object *obj, *ne;
df05ef87
PNA		 10991 struct nft_rule *rule, *nr;
10992 struct nft_set *set, *ns;
10993 struct nft_ctx ctx = {
10994 .net = net,
43a605f2 10995 .family = NFPROTO_NETDEV,
df05ef87
PNA		 10996 };
10997
fd020332
PNA		 10998 ctx.family = table->family;
10999 ctx.table = table;
11000 list_for_each_entry(chain, &table->chains, list) {
751d460c
PNA		 11001 if (nft_chain_is_bound(chain))
11002 continue;
11003
fd020332
PNA		 11004 ctx.chain = chain;
11005 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
11006 list_del(&rule->list);
1689f259 11007 nft_use_dec(&chain->use);
fd020332 11008 nf_tables_rule_release(&ctx, rule);
df05ef87 11009 }
df05ef87 11010 }
fd020332
PNA		 11011 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
11012 list_del(&flowtable->list);
1689f259 11013 nft_use_dec(&table->use);
fd020332
PNA		 11014 nf_tables_flowtable_destroy(flowtable);
11015 }
11016 list_for_each_entry_safe(set, ns, &table->sets, list) {
11017 list_del(&set->list);
1689f259 11018 nft_use_dec(&table->use);
628bd3e4
PNA		 11019 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
11020 nft_map_deactivate(&ctx, set);
11021
fd020332
PNA		 11022 nft_set_destroy(&ctx, set);
11023 }
11024 list_for_each_entry_safe(obj, ne, &table->objects, list) {
11025 nft_obj_del(obj);
1689f259 11026 nft_use_dec(&table->use);
fd020332
PNA		 11027 nft_obj_destroy(&ctx, obj);
11028 }
11029 list_for_each_entry_safe(chain, nc, &table->chains, list) {
11030 ctx.chain = chain;
11031 nft_chain_del(chain);
1689f259 11032 nft_use_dec(&table->use);
fd020332
PNA		 11033 nf_tables_chain_destroy(&ctx);
11034 }
fd020332
PNA		 11035 nf_tables_table_destroy(&ctx);
11036}
11037
bd1777b3 11038static void __nft_release_tables(struct net *net)
fd020332 11039{
d59d2f82 11040 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 11041 struct nft_table *table, *nt;
11042
0854db2a 11043 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 11044 if (nft_table_has_owner(table))
6001a930
PNA		 11045 continue;
11046
a499b03b
FW		 11047 list_del(&table->list);
11048
fd020332 11049 __nft_release_table(net, table);
6001a930
PNA		 11050 }
11051}
11052
11053static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
11054 void *ptr)
11055{
a499b03b 11056 struct nft_table *table, *to_delete[8];
0854db2a 11057 struct nftables_pernet *nft_net;
6001a930 11058 struct netlink_notify *n = ptr;
6001a930 11059 struct net *net = n->net;
a499b03b
FW		 11060 unsigned int deleted;
11061 bool restart = false;
6a33d8b7 11062 unsigned int gc_seq;
6001a930
PNA		 11063
11064 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
11065 return NOTIFY_DONE;
11066
d59d2f82 11067 nft_net = nft_pernet(net);
a499b03b 11068 deleted = 0;
0854db2a 11069 mutex_lock(&nft_net->commit_mutex);
6a33d8b7
PNA		 11070
11071 gc_seq = nft_gc_seq_begin(nft_net);
11072
d4bc8271
PNA		 11073 if (!list_empty(&nf_tables_destroy_list))
11074 rcu_barrier();
a499b03b 11075again:
0854db2a 11076 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 11077 if (nft_table_has_owner(table) &&
11078 n->portid == table->nlpid) {
11079 __nft_release_hook(net, table);
a499b03b
FW		 11080 list_del_rcu(&table->list);
11081 to_delete[deleted++] = table;
11082 if (deleted >= ARRAY_SIZE(to_delete))
11083 break;
6001a930
PNA		 11084 }
11085 }
a499b03b
FW		 11086 if (deleted) {
11087 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 11088 synchronize_rcu();
a499b03b
FW		 11089 while (deleted)
11090 __nft_release_table(net, to_delete[--deleted]);
11091
11092 if (restart)
11093 goto again;
6001a930 11094 }
6a33d8b7
PNA		 11095 nft_gc_seq_end(nft_net, gc_seq);
11096
0854db2a 11097 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 11098
11099 return NOTIFY_DONE;
df05ef87
PNA		 11100}
11101
6001a930
PNA		 11102static struct notifier_block nft_nl_notifier = {
11103 .notifier_call = nft_rcv_nl_event,
11104};
11105
dd4cbef7
PNA		 11106static int __net_init nf_tables_init_net(struct net *net)
11107{
d59d2f82 11108 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 11109
11110 INIT_LIST_HEAD(&nft_net->tables);
11111 INIT_LIST_HEAD(&nft_net->commit_list);
938154b9 11112 INIT_LIST_HEAD(&nft_net->binding_list);
0854db2a
FW		 11113 INIT_LIST_HEAD(&nft_net->module_list);
11114 INIT_LIST_HEAD(&nft_net->notify_list);
11115 mutex_init(&nft_net->commit_mutex);
11116 nft_net->base_seq = 1;
5f68718b 11117 nft_net->gc_seq = 0;
a654de8f 11118
dd4cbef7
PNA		 11119 return 0;
11120}
11121
767d1216
PNA		 11122static void __net_exit nf_tables_pre_exit_net(struct net *net)
11123{
3923b1e4
PNA		 11124 struct nftables_pernet *nft_net = nft_pernet(net);
11125
11126 mutex_lock(&nft_net->commit_mutex);
767d1216 11127 __nft_release_hooks(net);
3923b1e4 11128 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 11129}
11130
dd4cbef7
PNA		 11131static void __net_exit nf_tables_exit_net(struct net *net)
11132{
d59d2f82 11133 struct nftables_pernet *nft_net = nft_pernet(net);
6a33d8b7 11134 unsigned int gc_seq;
0854db2a
FW		 11135
11136 mutex_lock(&nft_net->commit_mutex);
6a33d8b7
PNA		 11137
11138 gc_seq = nft_gc_seq_begin(nft_net);
11139
03c1f1ef
SY		 11140 if (!list_empty(&nft_net->commit_list) ||
11141 !list_empty(&nft_net->module_list))
c0391b6a 11142 __nf_tables_abort(net, NFNL_ABORT_NONE);
6a33d8b7 11143
bd1777b3 11144 __nft_release_tables(net);
6a33d8b7
PNA		 11145
11146 nft_gc_seq_end(nft_net, gc_seq);
11147
0854db2a
FW		 11148 mutex_unlock(&nft_net->commit_mutex);
11149 WARN_ON_ONCE(!list_empty(&nft_net->tables));
11150 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
11151 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 11152}
11153
5f68718b
PNA		 11154static void nf_tables_exit_batch(struct list_head *net_exit_list)
11155{
11156 flush_work(&trans_gc_work);
11157}
11158
99633ab2 11159static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 11160 .init = nf_tables_init_net,
11161 .pre_exit = nf_tables_pre_exit_net,
11162 .exit = nf_tables_exit_net,
5f68718b 11163 .exit_batch = nf_tables_exit_batch,
0854db2a
FW		 11164 .id = &nf_tables_net_id,
11165 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 11166};
11167
96518518
PM		 11168static int __init nf_tables_module_init(void)
11169{
11170 int err;
11171
d209df3e
FW		 11172 err = register_pernet_subsys(&nf_tables_net_ops);
11173 if (err < 0)
11174 return err;
11175
11176 err = nft_chain_filter_init();
11177 if (err < 0)
6001a930 11178 goto err_chain_filter;
02c7b25e 11179
96518518
PM		 11180 err = nf_tables_core_module_init();
11181 if (err < 0)
6001a930 11182 goto err_core_module;
96518518 11183
d209df3e 11184 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 11185 if (err < 0)
6001a930 11186 goto err_netdev_notifier;
96518518 11187
4d44175a
FW		 11188 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
11189 if (err < 0)
6001a930 11190 goto err_rht_objname;
4d44175a 11191
06d392cb 11192 err = nft_offload_init();
11193 if (err < 0)
6001a930
PNA		 11194 goto err_offload;
11195
11196 err = netlink_register_notifier(&nft_nl_notifier);
11197 if (err < 0)
11198 goto err_netlink_notifier;
06d392cb 11199
d209df3e
FW		 11200 /* must be last */
11201 err = nfnetlink_subsys_register(&nf_tables_subsys);
11202 if (err < 0)
6001a930 11203 goto err_nfnl_subsys;
3b49e2e9 11204
c1deb065 11205 nft_chain_route_init();
3474a2c6 11206
d209df3e 11207 return err;
6001a930
PNA		 11208
11209err_nfnl_subsys:
11210 netlink_unregister_notifier(&nft_nl_notifier);
11211err_netlink_notifier:
06d392cb 11212 nft_offload_exit();
6001a930 11213err_offload:
4d44175a 11214 rhltable_destroy(&nft_objname_ht);
6001a930 11215err_rht_objname:
d209df3e 11216 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 11217err_netdev_notifier:
96518518 11218 nf_tables_core_module_exit();
6001a930 11219err_core_module:
d209df3e 11220 nft_chain_filter_fini();
6001a930 11221err_chain_filter:
d209df3e 11222 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 11223 return err;
11224}
11225
11226static void __exit nf_tables_module_exit(void)
11227{
11228 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 11229 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 11230 nft_offload_exit();
3b49e2e9 11231 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 11232 nft_chain_filter_fini();
c1deb065 11233 nft_chain_route_fini();
71ad00c5 11234 unregister_pernet_subsys(&nf_tables_net_ops);
5f68718b 11235 cancel_work_sync(&trans_gc_work);
0935d558 11236 cancel_work_sync(&trans_destroy_work);
1b1bc49c 11237 rcu_barrier();
4d44175a 11238 rhltable_destroy(&nft_objname_ht);
96518518 11239 nf_tables_core_module_exit();
96518518
PM		 11240}
11241
11242module_init(nf_tables_module_init);
11243module_exit(nf_tables_module_exit);
11244
11245MODULE_LICENSE("GPL");
11246MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
11247MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Linux 6.x block layer and io_uring tree(s)