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[thirdparty/linux.git] / net / netfilter / nf_tables_api.c
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d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
96518518 2/*
20a69341 3 * Copyright (c) 2007-2009 Patrick McHardy <kaber@trash.net>
96518518 4 *
96518518
PM		 5 * Development of this code funded by Astaro AG (http://www.astaro.com/)
6 */
7
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/list.h>
11#include <linux/skbuff.h>
12#include <linux/netlink.h>
1ff75a3e 13#include <linux/vmalloc.h>
0eb71a9d 14#include <linux/rhashtable.h>
8e6cf365 15#include <linux/audit.h>
96518518
PM		 16#include <linux/netfilter.h>
17#include <linux/netfilter/nfnetlink.h>
18#include <linux/netfilter/nf_tables.h>
3b49e2e9 19#include <net/netfilter/nf_flow_table.h>
96518518
PM		 20#include <net/netfilter/nf_tables_core.h>
21#include <net/netfilter/nf_tables.h>
c9626a2c 22#include <net/netfilter/nf_tables_offload.h>
99633ab2 23#include <net/net_namespace.h>
96518518
PM		 24#include <net/sock.h>
25
9332d27d
FW		 26#define NFT_MODULE_AUTOLOAD_LIMIT (MODULE_NAME_LEN - sizeof("nft-expr-255-"))
27
0854db2a
FW		 28unsigned int nf_tables_net_id __read_mostly;
29
96518518 30static LIST_HEAD(nf_tables_expressions);
e5009240 31static LIST_HEAD(nf_tables_objects);
3b49e2e9 32static LIST_HEAD(nf_tables_flowtables);
0935d558
FW		 33static LIST_HEAD(nf_tables_destroy_list);
34static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
96518518 35
a654de8f
PNA		 36enum {
37 NFT_VALIDATE_SKIP = 0,
38 NFT_VALIDATE_NEED,
39 NFT_VALIDATE_DO,
40};
41
4d44175a
FW		 42static struct rhltable nft_objname_ht;
43
1b2470e5
FW		 44static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
45static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
46static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
47
4d44175a
FW		 48static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
49static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
50static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
51
1b2470e5
FW		 52static const struct rhashtable_params nft_chain_ht_params = {
53 .head_offset = offsetof(struct nft_chain, rhlhead),
54 .key_offset = offsetof(struct nft_chain, name),
55 .hashfn = nft_chain_hash,
56 .obj_hashfn = nft_chain_hash_obj,
57 .obj_cmpfn = nft_chain_hash_cmp,
1b2470e5
FW		 58 .automatic_shrinking = true,
59};
60
4d44175a
FW		 61static const struct rhashtable_params nft_objname_ht_params = {
62 .head_offset = offsetof(struct nft_object, rhlhead),
63 .key_offset = offsetof(struct nft_object, key),
64 .hashfn = nft_objname_hash,
65 .obj_hashfn = nft_objname_hash_obj,
66 .obj_cmpfn = nft_objname_hash_cmp,
67 .automatic_shrinking = true,
68};
69
c520292f
RGB		 70struct nft_audit_data {
71 struct nft_table *table;
72 int entries;
73 int op;
74 struct list_head list;
75};
76
77static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
78 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
79 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
80 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
81 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
82 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
83 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
84 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
85 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
86 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
87 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
88 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
89 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
90 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
91 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
92 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
93 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
94 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
95 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
96 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
97 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
99 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
100 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
101 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
102 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
103};
104
00c320f9 105static void nft_validate_state_update(struct nft_table *table, u8 new_validate_state)
a654de8f 106{
00c320f9 107 switch (table->validate_state) {
a654de8f
PNA		 108 case NFT_VALIDATE_SKIP:
109 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
110 break;
111 case NFT_VALIDATE_NEED:
112 break;
113 case NFT_VALIDATE_DO:
114 if (new_validate_state == NFT_VALIDATE_NEED)
115 return;
116 }
117
00c320f9 118 table->validate_state = new_validate_state;
a654de8f 119}
0935d558
FW		 120static void nf_tables_trans_destroy_work(struct work_struct *w);
121static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
a654de8f 122
7c95f6d8 123static void nft_ctx_init(struct nft_ctx *ctx,
633c9a84 124 struct net *net,
7c95f6d8
PNA		 125 const struct sk_buff *skb,
126 const struct nlmsghdr *nlh,
36596dad 127 u8 family,
7c95f6d8
PNA		 128 struct nft_table *table,
129 struct nft_chain *chain,
130 const struct nlattr * const *nla)
131{
633c9a84 132 ctx->net = net;
36596dad 133 ctx->family = family;
26b2f552 134 ctx->level = 0;
128ad332
PNA		 135 ctx->table = table;
136 ctx->chain = chain;
137 ctx->nla = nla;
138 ctx->portid = NETLINK_CB(skb).portid;
139 ctx->report = nlmsg_report(nlh);
c9626a2c 140 ctx->flags = nlh->nlmsg_flags;
128ad332 141 ctx->seq = nlh->nlmsg_seq;
7c95f6d8
PNA		 142}
143
8411b644
PNA		 144static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
145 int msg_type, u32 size, gfp_t gfp)
1081d11b
PNA		 146{
147 struct nft_trans *trans;
148
8411b644 149 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
1081d11b
PNA		 150 if (trans == NULL)
151 return NULL;
152
58007785 153 INIT_LIST_HEAD(&trans->list);
b380e5c7 154 trans->msg_type = msg_type;
1081d11b
PNA		 155 trans->ctx = *ctx;
156
157 return trans;
158}
159
8411b644
PNA		 160static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
161 int msg_type, u32 size)
162{
163 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
164}
165
1081d11b
PNA		 166static void nft_trans_destroy(struct nft_trans *trans)
167{
168 list_del(&trans->list);
169 kfree(trans);
170}
171
f6ac8585
PNA		 172static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
173{
0854db2a 174 struct nftables_pernet *nft_net;
f6ac8585
PNA		 175 struct net *net = ctx->net;
176 struct nft_trans *trans;
177
178 if (!nft_set_is_anonymous(set))
179 return;
180
d59d2f82 181 nft_net = nft_pernet(net);
0854db2a 182 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
6a0a8d10
PNA		 183 switch (trans->msg_type) {
184 case NFT_MSG_NEWSET:
185 if (nft_trans_set(trans) == set)
186 nft_trans_set_bound(trans) = true;
187 break;
188 case NFT_MSG_NEWSETELEM:
189 if (nft_trans_elem_set(trans) == set)
190 nft_trans_elem_set_bound(trans) = true;
f6ac8585
PNA		 191 break;
192 }
193 }
194}
195
d54725cd
PNA		 196static int nft_netdev_register_hooks(struct net *net,
197 struct list_head *hook_list)
198{
199 struct nft_hook *hook;
200 int err, j;
201
202 j = 0;
203 list_for_each_entry(hook, hook_list, list) {
204 err = nf_register_net_hook(net, &hook->ops);
205 if (err < 0)
206 goto err_register;
207
208 j++;
209 }
210 return 0;
211
212err_register:
213 list_for_each_entry(hook, hook_list, list) {
214 if (j-- <= 0)
215 break;
216
217 nf_unregister_net_hook(net, &hook->ops);
218 }
219 return err;
220}
221
222static void nft_netdev_unregister_hooks(struct net *net,
f9a43007
PNA		 223 struct list_head *hook_list,
224 bool release_netdev)
d54725cd 225{
f9a43007 226 struct nft_hook *hook, *next;
d54725cd 227
f9a43007 228 list_for_each_entry_safe(hook, next, hook_list, list) {
d54725cd 229 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 230 if (release_netdev) {
231 list_del(&hook->list);
232 kfree_rcu(hook, rcu);
233 }
234 }
d54725cd
PNA		 235}
236
c974a3a3
PNA		 237static int nf_tables_register_hook(struct net *net,
238 const struct nft_table *table,
239 struct nft_chain *chain)
d8ee8f7c 240{
d54725cd 241 struct nft_base_chain *basechain;
a37061a6 242 const struct nf_hook_ops *ops;
ae6153b5 243
d8ee8f7c 244 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 245 !nft_is_base_chain(chain))
d8ee8f7c
PNA		 246 return 0;
247
4e25ceb8
FW		 248 basechain = nft_base_chain(chain);
249 ops = &basechain->ops;
ae6153b5 250
4e25ceb8
FW		 251 if (basechain->type->ops_register)
252 return basechain->type->ops_register(net, ops);
253
d3519cb8 254 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
1e9451cb
FW		 255 return nft_netdev_register_hooks(net, &basechain->hook_list);
256
257 return nf_register_net_hook(net, &basechain->ops);
d8ee8f7c
PNA		 258}
259
f9a43007
PNA		 260static void __nf_tables_unregister_hook(struct net *net,
261 const struct nft_table *table,
262 struct nft_chain *chain,
263 bool release_netdev)
c5598794 264{
d54725cd 265 struct nft_base_chain *basechain;
4e25ceb8
FW		 266 const struct nf_hook_ops *ops;
267
d8ee8f7c 268 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 269 !nft_is_base_chain(chain))
d8ee8f7c 270 return;
4e25ceb8
FW		 271 basechain = nft_base_chain(chain);
272 ops = &basechain->ops;
d8ee8f7c 273
4e25ceb8
FW		 274 if (basechain->type->ops_unregister)
275 return basechain->type->ops_unregister(net, ops);
276
d3519cb8 277 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
f9a43007
PNA		 278 nft_netdev_unregister_hooks(net, &basechain->hook_list,
279 release_netdev);
1e9451cb
FW		 280 else
281 nf_unregister_net_hook(net, &basechain->ops);
c5598794
AB		 282}
283
f9a43007
PNA		 284static void nf_tables_unregister_hook(struct net *net,
285 const struct nft_table *table,
286 struct nft_chain *chain)
287{
288 return __nf_tables_unregister_hook(net, table, chain, false);
289}
290
0854db2a
FW		 291static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
292{
d59d2f82 293 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a 294
0854db2a
FW		 295 list_add_tail(&trans->list, &nft_net->commit_list);
296}
297
ee01d542
AB		 298static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
299{
300 struct nft_trans *trans;
301
302 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
303 if (trans == NULL)
304 return -ENOMEM;
305
306 if (msg_type == NFT_MSG_NEWTABLE)
f2a6d766 307 nft_activate_next(ctx->net, ctx->table);
ee01d542 308
0854db2a 309 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 310 return 0;
311}
312
313static int nft_deltable(struct nft_ctx *ctx)
314{
315 int err;
316
317 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
318 if (err < 0)
319 return err;
320
f2a6d766 321 nft_deactivate_next(ctx->net, ctx->table);
ee01d542
AB		 322 return err;
323}
324
66293c46 325static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
ee01d542
AB		 326{
327 struct nft_trans *trans;
328
329 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
330 if (trans == NULL)
66293c46 331 return ERR_PTR(-ENOMEM);
ee01d542 332
74cccc3d 333 if (msg_type == NFT_MSG_NEWCHAIN) {
664b0f8c 334 nft_activate_next(ctx->net, ctx->chain);
ee01d542 335
74cccc3d
PNA		 336 if (ctx->nla[NFTA_CHAIN_ID]) {
337 nft_trans_chain_id(trans) =
338 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
339 }
340 }
341
0854db2a 342 nft_trans_commit_list_add_tail(ctx->net, trans);
66293c46 343 return trans;
ee01d542
AB		 344}
345
346static int nft_delchain(struct nft_ctx *ctx)
347{
66293c46 348 struct nft_trans *trans;
ee01d542 349
66293c46
FW		 350 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
351 if (IS_ERR(trans))
352 return PTR_ERR(trans);
ee01d542
AB		 353
354 ctx->table->use--;
664b0f8c 355 nft_deactivate_next(ctx->net, ctx->chain);
ee01d542 356
66293c46 357 return 0;
ee01d542
AB		 358}
359
bb7b40ae
PNA		 360static void nft_rule_expr_activate(const struct nft_ctx *ctx,
361 struct nft_rule *rule)
362{
363 struct nft_expr *expr;
364
365 expr = nft_expr_first(rule);
31cc578a 366 while (nft_expr_more(rule, expr)) {
bb7b40ae
PNA		 367 if (expr->ops->activate)
368 expr->ops->activate(ctx, expr);
369
370 expr = nft_expr_next(expr);
371 }
372}
373
374static void nft_rule_expr_deactivate(const struct nft_ctx *ctx,
f6ac8585
PNA		 375 struct nft_rule *rule,
376 enum nft_trans_phase phase)
bb7b40ae
PNA		 377{
378 struct nft_expr *expr;
379
380 expr = nft_expr_first(rule);
31cc578a 381 while (nft_expr_more(rule, expr)) {
bb7b40ae 382 if (expr->ops->deactivate)
f6ac8585 383 expr->ops->deactivate(ctx, expr, phase);
bb7b40ae
PNA		 384
385 expr = nft_expr_next(expr);
386 }
387}
388
ee01d542
AB		 389static int
390nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
391{
392 /* You cannot delete the same rule twice */
889f7ee7
PNA		 393 if (nft_is_active_next(ctx->net, rule)) {
394 nft_deactivate_next(ctx->net, rule);
ee01d542
AB		 395 ctx->chain->use--;
396 return 0;
397 }
398 return -ENOENT;
399}
400
401static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
402 struct nft_rule *rule)
403{
404 struct nft_trans *trans;
405
406 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
407 if (trans == NULL)
408 return NULL;
409
1a94e38d
PNA		 410 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
411 nft_trans_rule_id(trans) =
412 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
413 }
ee01d542 414 nft_trans_rule(trans) = rule;
0854db2a 415 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 416
417 return trans;
418}
419
420static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
421{
63b48c73 422 struct nft_flow_rule *flow;
ee01d542
AB		 423 struct nft_trans *trans;
424 int err;
425
426 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
427 if (trans == NULL)
428 return -ENOMEM;
429
63b48c73
PNA		 430 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
431 flow = nft_flow_rule_create(ctx->net, rule);
432 if (IS_ERR(flow)) {
433 nft_trans_destroy(trans);
434 return PTR_ERR(flow);
435 }
436
437 nft_trans_flow_rule(trans) = flow;
438 }
439
ee01d542
AB		 440 err = nf_tables_delrule_deactivate(ctx, rule);
441 if (err < 0) {
442 nft_trans_destroy(trans);
443 return err;
444 }
f6ac8585 445 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
ee01d542
AB		 446
447 return 0;
448}
449
450static int nft_delrule_by_chain(struct nft_ctx *ctx)
451{
452 struct nft_rule *rule;
453 int err;
454
455 list_for_each_entry(rule, &ctx->chain->rules, list) {
23b7ca4f
PNA		 456 if (!nft_is_active_next(ctx->net, rule))
457 continue;
458
ee01d542
AB		 459 err = nft_delrule(ctx, rule);
460 if (err < 0)
461 return err;
462 }
463 return 0;
464}
465
123b9961
PNA		 466static int __nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
467 struct nft_set *set,
468 const struct nft_set_desc *desc)
ee01d542
AB		 469{
470 struct nft_trans *trans;
471
472 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
473 if (trans == NULL)
474 return -ENOMEM;
475
123b9961 476 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] && !desc) {
ee01d542
AB		 477 nft_trans_set_id(trans) =
478 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
37a9cc52 479 nft_activate_next(ctx->net, set);
ee01d542
AB		 480 }
481 nft_trans_set(trans) = set;
123b9961
PNA		 482 if (desc) {
483 nft_trans_set_update(trans) = true;
484 nft_trans_set_gc_int(trans) = desc->gc_int;
485 nft_trans_set_timeout(trans) = desc->timeout;
486 }
0854db2a 487 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 488
489 return 0;
490}
491
123b9961
PNA		 492static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
493 struct nft_set *set)
494{
495 return __nft_trans_set_add(ctx, msg_type, set, NULL);
496}
497
cd5125d8 498static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
ee01d542
AB		 499{
500 int err;
501
502 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
503 if (err < 0)
504 return err;
505
37a9cc52 506 nft_deactivate_next(ctx->net, set);
ee01d542
AB		 507 ctx->table->use--;
508
509 return err;
510}
511
e5009240
PNA		 512static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
513 struct nft_object *obj)
514{
515 struct nft_trans *trans;
516
517 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
518 if (trans == NULL)
519 return -ENOMEM;
520
521 if (msg_type == NFT_MSG_NEWOBJ)
522 nft_activate_next(ctx->net, obj);
523
524 nft_trans_obj(trans) = obj;
0854db2a 525 nft_trans_commit_list_add_tail(ctx->net, trans);
e5009240
PNA		 526
527 return 0;
528}
529
530static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
531{
532 int err;
533
534 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
535 if (err < 0)
536 return err;
537
538 nft_deactivate_next(ctx->net, obj);
539 ctx->table->use--;
540
541 return err;
542}
543
3b49e2e9
PNA		 544static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
545 struct nft_flowtable *flowtable)
546{
547 struct nft_trans *trans;
548
549 trans = nft_trans_alloc(ctx, msg_type,
550 sizeof(struct nft_trans_flowtable));
551 if (trans == NULL)
552 return -ENOMEM;
553
554 if (msg_type == NFT_MSG_NEWFLOWTABLE)
555 nft_activate_next(ctx->net, flowtable);
556
2c9e4559 557 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
3b49e2e9 558 nft_trans_flowtable(trans) = flowtable;
0854db2a 559 nft_trans_commit_list_add_tail(ctx->net, trans);
3b49e2e9
PNA		 560
561 return 0;
562}
563
564static int nft_delflowtable(struct nft_ctx *ctx,
565 struct nft_flowtable *flowtable)
566{
567 int err;
568
569 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
570 if (err < 0)
571 return err;
572
573 nft_deactivate_next(ctx->net, flowtable);
574 ctx->table->use--;
575
576 return err;
577}
578
34cc9e52
PNA		 579static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
580{
581 int i;
582
583 for (i = track->regs[dreg].num_reg; i > 0; i--)
584 __nft_reg_track_cancel(track, dreg - i);
585}
586
587static void __nft_reg_track_update(struct nft_regs_track *track,
588 const struct nft_expr *expr,
589 u8 dreg, u8 num_reg)
590{
591 track->regs[dreg].selector = expr;
592 track->regs[dreg].bitwise = NULL;
593 track->regs[dreg].num_reg = num_reg;
594}
595
596void nft_reg_track_update(struct nft_regs_track *track,
597 const struct nft_expr *expr, u8 dreg, u8 len)
598{
599 unsigned int regcount;
600 int i;
601
602 __nft_reg_track_clobber(track, dreg);
603
604 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
605 for (i = 0; i < regcount; i++, dreg++)
606 __nft_reg_track_update(track, expr, dreg, i);
607}
608EXPORT_SYMBOL_GPL(nft_reg_track_update);
609
610void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
611{
612 unsigned int regcount;
613 int i;
614
615 __nft_reg_track_clobber(track, dreg);
616
617 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
618 for (i = 0; i < regcount; i++, dreg++)
619 __nft_reg_track_cancel(track, dreg);
620}
621EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
622
623void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
624{
625 track->regs[dreg].selector = NULL;
626 track->regs[dreg].bitwise = NULL;
627 track->regs[dreg].num_reg = 0;
628}
629EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
630
96518518
PM		 631/*
632 * Tables
633 */
634
36596dad 635static struct nft_table *nft_table_lookup(const struct net *net,
f2a6d766 636 const struct nlattr *nla,
6001a930 637 u8 family, u8 genmask, u32 nlpid)
96518518 638{
0854db2a 639 struct nftables_pernet *nft_net;
96518518
PM		 640 struct nft_table *table;
641
cac20fcd
PNA		 642 if (nla == NULL)
643 return ERR_PTR(-EINVAL);
644
d59d2f82 645 nft_net = nft_pernet(net);
0854db2a
FW		 646 list_for_each_entry_rcu(table, &nft_net->tables, list,
647 lockdep_is_held(&nft_net->commit_mutex)) {
f2a6d766 648 if (!nla_strcmp(nla, table->name) &&
98319cb9 649 table->family == family &&
6001a930
PNA		 650 nft_active_genmask(table, genmask)) {
651 if (nft_table_has_owner(table) &&
53479909 652 nlpid && table->nlpid != nlpid)
6001a930
PNA		 653 return ERR_PTR(-EPERM);
654
96518518 655 return table;
6001a930 656 }
96518518 657 }
cac20fcd
PNA		 658
659 return ERR_PTR(-ENOENT);
96518518
PM		 660}
661
3ecbfd65
HS		 662static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
663 const struct nlattr *nla,
e31f072f 664 u8 genmask, u32 nlpid)
3ecbfd65 665{
0854db2a 666 struct nftables_pernet *nft_net;
3ecbfd65
HS		 667 struct nft_table *table;
668
d59d2f82 669 nft_net = nft_pernet(net);
0854db2a 670 list_for_each_entry(table, &nft_net->tables, list) {
3ecbfd65 671 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
e31f072f
PNA		 672 nft_active_genmask(table, genmask)) {
673 if (nft_table_has_owner(table) &&
674 nlpid && table->nlpid != nlpid)
675 return ERR_PTR(-EPERM);
676
3ecbfd65 677 return table;
e31f072f 678 }
3ecbfd65 679 }
3ecbfd65
HS		 680
681 return ERR_PTR(-ENOENT);
682}
683
96518518
PM		 684static inline u64 nf_tables_alloc_handle(struct nft_table *table)
685{
686 return ++table->hgenerator;
687}
688
32537e91 689static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
9370761c 690
82603549
PNA		 691static const struct nft_chain_type *
692__nft_chain_type_get(u8 family, enum nft_chain_types type)
693{
694 if (family >= NFPROTO_NUMPROTO ||
695 type >= NFT_CHAIN_T_MAX)
696 return NULL;
697
698 return chain_type[family][type];
699}
700
32537e91 701static const struct nft_chain_type *
1ea26cca 702__nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
9370761c 703{
82603549 704 const struct nft_chain_type *type;
9370761c
PNA		 705 int i;
706
baae3e62 707 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
82603549
PNA		 708 type = __nft_chain_type_get(family, i);
709 if (!type)
710 continue;
711 if (!nla_strcmp(nla, type->name))
712 return type;
9370761c 713 }
baae3e62 714 return NULL;
9370761c
PNA		 715}
716
eb014de4
PNA		 717struct nft_module_request {
718 struct list_head list;
719 char module[MODULE_NAME_LEN];
720 bool done;
721};
722
452238e8 723#ifdef CONFIG_MODULES
cefa31a9
FW		 724__printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
725 ...)
452238e8
FW		 726{
727 char module_name[MODULE_NAME_LEN];
0854db2a 728 struct nftables_pernet *nft_net;
eb014de4 729 struct nft_module_request *req;
452238e8
FW		 730 va_list args;
731 int ret;
732
452238e8
FW		 733 va_start(args, fmt);
734 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
735 va_end(args);
9332d27d 736 if (ret >= MODULE_NAME_LEN)
eb014de4 737 return 0;
452238e8 738
d59d2f82 739 nft_net = nft_pernet(net);
0854db2a 740 list_for_each_entry(req, &nft_net->module_list, list) {
eb014de4
PNA		 741 if (!strcmp(req->module, module_name)) {
742 if (req->done)
743 return 0;
ec7470b8 744
eb014de4
PNA		 745 /* A request to load this module already exists. */
746 return -EAGAIN;
747 }
748 }
749
750 req = kmalloc(sizeof(*req), GFP_KERNEL);
751 if (!req)
752 return -ENOMEM;
753
754 req->done = false;
8556bceb 755 strscpy(req->module, module_name, MODULE_NAME_LEN);
0854db2a 756 list_add_tail(&req->list, &nft_net->module_list);
eb014de4
PNA		 757
758 return -EAGAIN;
452238e8 759}
cefa31a9 760EXPORT_SYMBOL_GPL(nft_request_module);
452238e8
FW		 761#endif
762
f102d66b
FW		 763static void lockdep_nfnl_nft_mutex_not_held(void)
764{
765#ifdef CONFIG_PROVE_LOCKING
c0700dfa
FW		 766 if (debug_locks)
767 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
f102d66b
FW		 768#endif
769}
770
32537e91 771static const struct nft_chain_type *
452238e8
FW		 772nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
773 u8 family, bool autoload)
9370761c 774{
32537e91 775 const struct nft_chain_type *type;
9370761c 776
1ea26cca 777 type = __nf_tables_chain_type_lookup(nla, family);
93b0806f
PM		 778 if (type != NULL)
779 return type;
f102d66b
FW		 780
781 lockdep_nfnl_nft_mutex_not_held();
9370761c 782#ifdef CONFIG_MODULES
93b0806f 783 if (autoload) {
eb014de4
PNA		 784 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
785 nla_len(nla),
786 (const char *)nla_data(nla)) == -EAGAIN)
93b0806f 787 return ERR_PTR(-EAGAIN);
9370761c
PNA		 788 }
789#endif
93b0806f 790 return ERR_PTR(-ENOENT);
9370761c
PNA		 791}
792
802b8051
PNA		 793static __be16 nft_base_seq(const struct net *net)
794{
d59d2f82 795 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 796
797 return htons(nft_net->base_seq & 0xffff);
802b8051
PNA		 798}
799
96518518 800static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
1cae565e
PNA		 801 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
802 .len = NFT_TABLE_MAXNAMELEN - 1 },
9ddf6323 803 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
3ecbfd65 804 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
7a81575b
JGG		 805 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
806 .len = NFT_USERDATA_MAXLEN }
96518518
PM		 807};
808
84d7fce6
PNA		 809static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
810 u32 portid, u32 seq, int event, u32 flags,
811 int family, const struct nft_table *table)
96518518
PM		 812{
813 struct nlmsghdr *nlh;
96518518 814
dedb67c4 815 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 816 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
817 NFNETLINK_V0, nft_base_seq(net));
818 if (!nlh)
96518518
PM		 819 goto nla_put_failure;
820
9ddf6323 821 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
3ecbfd65
HS		 822 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
823 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
824 NFTA_TABLE_PAD))
96518518 825 goto nla_put_failure;
28339b21
PNA		 826
827 if (event == NFT_MSG_DELTABLE) {
828 nlmsg_end(skb, nlh);
829 return 0;
830 }
831
832 if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
833 htonl(table->flags & NFT_TABLE_F_MASK)))
834 goto nla_put_failure;
835
6001a930
PNA		 836 if (nft_table_has_owner(table) &&
837 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
838 goto nla_put_failure;
96518518 839
7a81575b
JGG		 840 if (table->udata) {
841 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
842 goto nla_put_failure;
843 }
844
053c095a
JB		 845 nlmsg_end(skb, nlh);
846 return 0;
96518518
PM		 847
848nla_put_failure:
849 nlmsg_trim(skb, nlh);
850 return -1;
851}
852
67cc570e
PNA		 853struct nftnl_skb_parms {
854 bool report;
855};
856#define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
857
858static void nft_notify_enqueue(struct sk_buff *skb, bool report,
859 struct list_head *notify_list)
860{
861 NFT_CB(skb).report = report;
862 list_add_tail(&skb->list, notify_list);
863}
864
25e94a99 865static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
96518518 866{
0854db2a 867 struct nftables_pernet *nft_net;
96518518 868 struct sk_buff *skb;
6fb721cf 869 u16 flags = 0;
96518518
PM		 870 int err;
871
128ad332
PNA		 872 if (!ctx->report &&
873 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 874 return;
96518518 875
96518518
PM		 876 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
877 if (skb == NULL)
878 goto err;
879
6fb721cf
PNA		 880 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
881 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
882
84d7fce6 883 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 884 event, flags, ctx->family, ctx->table);
96518518
PM		 885 if (err < 0) {
886 kfree_skb(skb);
887 goto err;
888 }
889
d59d2f82 890 nft_net = nft_pernet(ctx->net);
0854db2a 891 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 892 return;
96518518 893err:
25e94a99 894 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 895}
896
897static int nf_tables_dump_tables(struct sk_buff *skb,
898 struct netlink_callback *cb)
899{
900 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
0854db2a 901 struct nftables_pernet *nft_net;
96518518
PM		 902 const struct nft_table *table;
903 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 904 struct net *net = sock_net(skb->sk);
96518518
PM		 905 int family = nfmsg->nfgen_family;
906
e688a7f8 907 rcu_read_lock();
d59d2f82 908 nft_net = nft_pernet(net);
34002783 909 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 910
0854db2a 911 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 912 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 913 continue;
914
36596dad
PNA		 915 if (idx < s_idx)
916 goto cont;
917 if (idx > s_idx)
918 memset(&cb->args[1], 0,
919 sizeof(cb->args) - sizeof(cb->args[0]));
920 if (!nft_is_active(net, table))
921 continue;
922 if (nf_tables_fill_table_info(skb, net,
923 NETLINK_CB(cb->skb).portid,
924 cb->nlh->nlmsg_seq,
925 NFT_MSG_NEWTABLE, NLM_F_MULTI,
98319cb9 926 table->family, table) < 0)
36596dad
PNA		 927 goto done;
928
929 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 930cont:
36596dad 931 idx++;
96518518
PM		 932 }
933done:
e688a7f8 934 rcu_read_unlock();
96518518
PM		 935 cb->args[0] = idx;
936 return skb->len;
937}
938
d9adf22a
FW		 939static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
940 const struct nlmsghdr *nlh,
941 struct netlink_dump_control *c)
942{
943 int err;
944
945 if (!try_module_get(THIS_MODULE))
946 return -EINVAL;
947
948 rcu_read_unlock();
949 err = netlink_dump_start(nlsk, skb, nlh, c);
950 rcu_read_lock();
951 module_put(THIS_MODULE);
952
953 return err;
954}
955
956/* called with rcu_read_lock held */
797d4980
PNA		 957static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
958 const struct nlattr * const nla[])
96518518 959{
797d4980
PNA		 960 struct netlink_ext_ack *extack = info->extack;
961 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 962 u8 family = info->nfmsg->nfgen_family;
96518518 963 const struct nft_table *table;
797d4980 964 struct net *net = info->net;
96518518 965 struct sk_buff *skb2;
96518518
PM		 966 int err;
967
797d4980 968 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 969 struct netlink_dump_control c = {
970 .dump = nf_tables_dump_tables,
d9adf22a 971 .module = THIS_MODULE,
96518518 972 };
d9adf22a 973
797d4980 974 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 975 }
976
6001a930 977 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
36dd1bcc
PNA		 978 if (IS_ERR(table)) {
979 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
96518518 980 return PTR_ERR(table);
36dd1bcc 981 }
96518518 982
d9adf22a 983 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 984 if (!skb2)
985 return -ENOMEM;
986
84d7fce6 987 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
797d4980
PNA		 988 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
989 0, family, table);
96518518 990 if (err < 0)
ee921183 991 goto err_fill_table_info;
96518518 992
ee921183 993 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 994
ee921183 995err_fill_table_info:
96518518
PM		 996 kfree_skb(skb2);
997 return err;
998}
999
c9c17211 1000static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
10435c11
F		 1001{
1002 struct nft_chain *chain;
1003 u32 i = 0;
1004
1005 list_for_each_entry(chain, &table->chains, list) {
1006 if (!nft_is_active_next(net, chain))
1007 continue;
f323d954 1008 if (!nft_is_base_chain(chain))
10435c11
F		 1009 continue;
1010
1011 if (cnt && i++ == cnt)
1012 break;
1013
1e9451cb 1014 nf_tables_unregister_hook(net, table, chain);
10435c11
F		 1015 }
1016}
1017
c9c17211 1018static int nf_tables_table_enable(struct net *net, struct nft_table *table)
9ddf6323
PNA		 1019{
1020 struct nft_chain *chain;
1021 int err, i = 0;
1022
1023 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1024 if (!nft_is_active_next(net, chain))
1025 continue;
f323d954 1026 if (!nft_is_base_chain(chain))
d2012975
PNA		 1027 continue;
1028
1e9451cb 1029 err = nf_tables_register_hook(net, table, chain);
9ddf6323 1030 if (err < 0)
d54725cd 1031 goto err_register_hooks;
9ddf6323
PNA		 1032
1033 i++;
1034 }
1035 return 0;
d54725cd
PNA		 1036
1037err_register_hooks:
10435c11 1038 if (i)
c9c17211 1039 nft_table_disable(net, table, i);
9ddf6323
PNA		 1040 return err;
1041}
1042
c9c17211 1043static void nf_tables_table_disable(struct net *net, struct nft_table *table)
9ddf6323 1044{
179d9ba5 1045 table->flags &= ~NFT_TABLE_F_DORMANT;
c9c17211 1046 nft_table_disable(net, table, 0);
179d9ba5 1047 table->flags |= NFT_TABLE_F_DORMANT;
9ddf6323
PNA		 1048}
1049
179d9ba5
PNA		 1050#define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1051#define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1052#define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1053#define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1054 __NFT_TABLE_F_WAS_AWAKEN)
0ce7cf41 1055
e1aaca93 1056static int nf_tables_updtable(struct nft_ctx *ctx)
9ddf6323 1057{
55dd6f93 1058 struct nft_trans *trans;
e1aaca93 1059 u32 flags;
179d9ba5 1060 int ret;
9ddf6323 1061
e1aaca93
PNA		 1062 if (!ctx->nla[NFTA_TABLE_FLAGS])
1063 return 0;
9ddf6323 1064
e1aaca93 1065 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1066 if (flags & ~NFT_TABLE_F_MASK)
1067 return -EOPNOTSUPP;
e1aaca93 1068
63283dd2
PNA		 1069 if (flags == ctx->table->flags)
1070 return 0;
1071
9cc0001a
PNA		 1072 if ((nft_table_has_owner(ctx->table) &&
1073 !(flags & NFT_TABLE_F_OWNER)) ||
1074 (!nft_table_has_owner(ctx->table) &&
1075 flags & NFT_TABLE_F_OWNER))
1076 return -EOPNOTSUPP;
1077
55dd6f93
PNA		 1078 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1079 sizeof(struct nft_trans_table));
1080 if (trans == NULL)
1081 return -ENOMEM;
9ddf6323 1082
e1aaca93
PNA		 1083 if ((flags & NFT_TABLE_F_DORMANT) &&
1084 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
179d9ba5
PNA		 1085 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1086 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1087 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
e1aaca93
PNA		 1088 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1089 ctx->table->flags & NFT_TABLE_F_DORMANT) {
179d9ba5
PNA		 1090 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1091 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1092 ret = nf_tables_table_enable(ctx->net, ctx->table);
1093 if (ret < 0)
1094 goto err_register_hooks;
1095
1096 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1097 }
9ddf6323
PNA		 1098 }
1099
55dd6f93 1100 nft_trans_table_update(trans) = true;
0854db2a 1101 nft_trans_commit_list_add_tail(ctx->net, trans);
179d9ba5 1102
55dd6f93 1103 return 0;
179d9ba5
PNA		 1104
1105err_register_hooks:
55dd6f93 1106 nft_trans_destroy(trans);
9ddf6323
PNA		 1107 return ret;
1108}
1109
1b2470e5
FW		 1110static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1111{
1112 const char *name = data;
1113
1114 return jhash(name, strlen(name), seed);
1115}
1116
1117static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1118{
1119 const struct nft_chain *chain = data;
1120
1121 return nft_chain_hash(chain->name, 0, seed);
1122}
1123
1124static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1125 const void *ptr)
1126{
1127 const struct nft_chain *chain = ptr;
1128 const char *name = arg->key;
1129
1130 return strcmp(chain->name, name);
1131}
1132
4d44175a
FW		 1133static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1134{
1135 const struct nft_object_hash_key *k = data;
1136
1137 seed ^= hash_ptr(k->table, 32);
1138
1139 return jhash(k->name, strlen(k->name), seed);
1140}
1141
1142static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1143{
1144 const struct nft_object *obj = data;
1145
1146 return nft_objname_hash(&obj->key, 0, seed);
1147}
1148
1149static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1150 const void *ptr)
1151{
1152 const struct nft_object_hash_key *k = arg->key;
1153 const struct nft_object *obj = ptr;
1154
1155 if (obj->key.table != k->table)
1156 return -1;
1157
1158 return strcmp(obj->key.name, k->name);
1159}
1160
f1082dd3
PS		 1161static bool nft_supported_family(u8 family)
1162{
1163 return false
1164#ifdef CONFIG_NF_TABLES_INET
1165 || family == NFPROTO_INET
1166#endif
1167#ifdef CONFIG_NF_TABLES_IPV4
1168 || family == NFPROTO_IPV4
1169#endif
1170#ifdef CONFIG_NF_TABLES_ARP
1171 || family == NFPROTO_ARP
1172#endif
1173#ifdef CONFIG_NF_TABLES_NETDEV
1174 || family == NFPROTO_NETDEV
1175#endif
1176#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1177 || family == NFPROTO_BRIDGE
1178#endif
1179#ifdef CONFIG_NF_TABLES_IPV6
1180 || family == NFPROTO_IPV6
1181#endif
1182 ;
1183}
1184
7dab8ee3
PNA		 1185static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1186 const struct nlattr * const nla[])
96518518 1187{
7dab8ee3 1188 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 1189 struct netlink_ext_ack *extack = info->extack;
1190 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1191 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1192 struct net *net = info->net;
36dd1bcc
PNA		 1193 const struct nlattr *attr;
1194 struct nft_table *table;
e1aaca93 1195 struct nft_ctx ctx;
7a81575b 1196 u32 flags = 0;
55dd6f93 1197 int err;
96518518 1198
f1082dd3
PS		 1199 if (!nft_supported_family(family))
1200 return -EOPNOTSUPP;
1201
0854db2a 1202 lockdep_assert_held(&nft_net->commit_mutex);
36dd1bcc 1203 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1204 table = nft_table_lookup(net, attr, family, genmask,
1205 NETLINK_CB(skb).portid);
96518518
PM		 1206 if (IS_ERR(table)) {
1207 if (PTR_ERR(table) != -ENOENT)
1208 return PTR_ERR(table);
1a28ad74 1209 } else {
7dab8ee3 1210 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 1211 NL_SET_BAD_ATTR(extack, attr);
96518518 1212 return -EEXIST;
36dd1bcc 1213 }
7dab8ee3 1214 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518 1215 return -EOPNOTSUPP;
e1aaca93 1216
7dab8ee3
PNA		 1217 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1218
e1aaca93 1219 return nf_tables_updtable(&ctx);
96518518
PM		 1220 }
1221
c5c1f975
PM		 1222 if (nla[NFTA_TABLE_FLAGS]) {
1223 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1224 if (flags & ~NFT_TABLE_F_MASK)
1225 return -EOPNOTSUPP;
c5c1f975
PM		 1226 }
1227
ffdb210e 1228 err = -ENOMEM;
33758c89 1229 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
ffdb210e 1230 if (table == NULL)
98319cb9 1231 goto err_kzalloc;
96518518 1232
00c320f9 1233 table->validate_state = NFT_VALIDATE_SKIP;
33758c89 1234 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
e46abbcc 1235 if (table->name == NULL)
98319cb9 1236 goto err_strdup;
e46abbcc 1237
7a81575b 1238 if (nla[NFTA_TABLE_USERDATA]) {
33758c89 1239 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
7a81575b
JGG		 1240 if (table->udata == NULL)
1241 goto err_table_udata;
1242
85db827a 1243 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
7a81575b
JGG		 1244 }
1245
1b2470e5
FW		 1246 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1247 if (err)
1248 goto err_chain_ht;
1249
96518518 1250 INIT_LIST_HEAD(&table->chains);
20a69341 1251 INIT_LIST_HEAD(&table->sets);
e5009240 1252 INIT_LIST_HEAD(&table->objects);
3b49e2e9 1253 INIT_LIST_HEAD(&table->flowtables);
98319cb9 1254 table->family = family;
c5c1f975 1255 table->flags = flags;
ab482c6b 1256 table->handle = ++nft_net->table_handle;
6001a930
PNA		 1257 if (table->flags & NFT_TABLE_F_OWNER)
1258 table->nlpid = NETLINK_CB(skb).portid;
9ddf6323 1259
7dab8ee3 1260 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
55dd6f93 1261 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
ffdb210e 1262 if (err < 0)
98319cb9 1263 goto err_trans;
ffdb210e 1264
0854db2a 1265 list_add_tail_rcu(&table->list, &nft_net->tables);
96518518 1266 return 0;
98319cb9 1267err_trans:
1b2470e5
FW		 1268 rhltable_destroy(&table->chains_ht);
1269err_chain_ht:
7a81575b
JGG		 1270 kfree(table->udata);
1271err_table_udata:
e46abbcc 1272 kfree(table->name);
98319cb9 1273err_strdup:
ffdb210e 1274 kfree(table);
98319cb9 1275err_kzalloc:
ffdb210e 1276 return err;
96518518
PM		 1277}
1278
b9ac12ef
AB		 1279static int nft_flush_table(struct nft_ctx *ctx)
1280{
3b49e2e9 1281 struct nft_flowtable *flowtable, *nft;
b9ac12ef 1282 struct nft_chain *chain, *nc;
e5009240 1283 struct nft_object *obj, *ne;
b9ac12ef 1284 struct nft_set *set, *ns;
3b49e2e9 1285 int err;
b9ac12ef 1286
a2f18db0 1287 list_for_each_entry(chain, &ctx->table->chains, list) {
664b0f8c
PNA		 1288 if (!nft_is_active_next(ctx->net, chain))
1289 continue;
1290
d0e2c7de
PNA		 1291 if (nft_chain_is_bound(chain))
1292 continue;
1293
b9ac12ef
AB		 1294 ctx->chain = chain;
1295
1296 err = nft_delrule_by_chain(ctx);
1297 if (err < 0)
1298 goto out;
b9ac12ef
AB		 1299 }
1300
1301 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
37a9cc52
PNA		 1302 if (!nft_is_active_next(ctx->net, set))
1303 continue;
1304
408070d6 1305 if (nft_set_is_anonymous(set) &&
b9ac12ef
AB		 1306 !list_empty(&set->bindings))
1307 continue;
1308
1309 err = nft_delset(ctx, set);
1310 if (err < 0)
1311 goto out;
1312 }
1313
3b49e2e9 1314 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
335178d5
FW		 1315 if (!nft_is_active_next(ctx->net, flowtable))
1316 continue;
1317
3b49e2e9
PNA		 1318 err = nft_delflowtable(ctx, flowtable);
1319 if (err < 0)
1320 goto out;
1321 }
1322
e5009240 1323 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
335178d5
FW		 1324 if (!nft_is_active_next(ctx->net, obj))
1325 continue;
1326
e5009240
PNA		 1327 err = nft_delobj(ctx, obj);
1328 if (err < 0)
1329 goto out;
1330 }
1331
a2f18db0 1332 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
664b0f8c
PNA		 1333 if (!nft_is_active_next(ctx->net, chain))
1334 continue;
1335
d0e2c7de
PNA		 1336 if (nft_chain_is_bound(chain))
1337 continue;
1338
a2f18db0
PNA		 1339 ctx->chain = chain;
1340
1341 err = nft_delchain(ctx);
1342 if (err < 0)
1343 goto out;
1344 }
1345
b9ac12ef
AB		 1346 err = nft_deltable(ctx);
1347out:
1348 return err;
1349}
1350
1351static int nft_flush(struct nft_ctx *ctx, int family)
1352{
d59d2f82 1353 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
b9ac12ef 1354 const struct nlattr * const *nla = ctx->nla;
d59d2f82 1355 struct nft_table *table, *nt;
b9ac12ef
AB		 1356 int err = 0;
1357
0854db2a 1358 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
98319cb9 1359 if (family != AF_UNSPEC && table->family != family)
b9ac12ef
AB		 1360 continue;
1361
98319cb9 1362 ctx->family = table->family;
f2a6d766 1363
36596dad
PNA		 1364 if (!nft_is_active_next(ctx->net, table))
1365 continue;
b9ac12ef 1366
6001a930
PNA		 1367 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1368 continue;
1369
36596dad
PNA		 1370 if (nla[NFTA_TABLE_NAME] &&
1371 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1372 continue;
b9ac12ef 1373
36596dad
PNA		 1374 ctx->table = table;
1375
1376 err = nft_flush_table(ctx);
1377 if (err < 0)
1378 goto out;
b9ac12ef
AB		 1379 }
1380out:
1381 return err;
1382}
1383
7dab8ee3
PNA		 1384static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1385 const struct nlattr * const nla[])
96518518 1386{
7dab8ee3
PNA		 1387 struct netlink_ext_ack *extack = info->extack;
1388 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1389 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1390 struct net *net = info->net;
36dd1bcc
PNA		 1391 const struct nlattr *attr;
1392 struct nft_table *table;
55dd6f93 1393 struct nft_ctx ctx;
96518518 1394
7dab8ee3 1395 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
3ecbfd65
HS		 1396 if (family == AF_UNSPEC ||
1397 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
b9ac12ef
AB		 1398 return nft_flush(&ctx, family);
1399
36dd1bcc
PNA		 1400 if (nla[NFTA_TABLE_HANDLE]) {
1401 attr = nla[NFTA_TABLE_HANDLE];
e31f072f
PNA		 1402 table = nft_table_lookup_byhandle(net, attr, genmask,
1403 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 1404 } else {
1405 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1406 table = nft_table_lookup(net, attr, family, genmask,
1407 NETLINK_CB(skb).portid);
36dd1bcc 1408 }
3ecbfd65 1409
36dd1bcc 1410 if (IS_ERR(table)) {
f80a612d
FFM		 1411 if (PTR_ERR(table) == -ENOENT &&
1412 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
1413 return 0;
1414
36dd1bcc 1415 NL_SET_BAD_ATTR(extack, attr);
96518518 1416 return PTR_ERR(table);
36dd1bcc 1417 }
96518518 1418
7dab8ee3 1419 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
a8278400
PNA		 1420 table->use > 0)
1421 return -EBUSY;
1422
98319cb9 1423 ctx.family = family;
b9ac12ef 1424 ctx.table = table;
55dd6f93 1425
b9ac12ef 1426 return nft_flush_table(&ctx);
96518518
PM		 1427}
1428
55dd6f93
PNA		 1429static void nf_tables_table_destroy(struct nft_ctx *ctx)
1430{
fa5950e4
FW		 1431 if (WARN_ON(ctx->table->use > 0))
1432 return;
4fefee57 1433
1b2470e5 1434 rhltable_destroy(&ctx->table->chains_ht);
e46abbcc 1435 kfree(ctx->table->name);
bc7a7082 1436 kfree(ctx->table->udata);
55dd6f93 1437 kfree(ctx->table);
55dd6f93
PNA		 1438}
1439
cc07eeb0 1440void nft_register_chain_type(const struct nft_chain_type *ctype)
96518518 1441{
96518518 1442 nfnl_lock(NFNL_SUBSYS_NFTABLES);
82603549 1443 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
cc07eeb0
PNA		 1444 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1445 return;
96518518 1446 }
9370761c 1447 chain_type[ctype->family][ctype->type] = ctype;
96518518 1448 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
96518518 1449}
9370761c 1450EXPORT_SYMBOL_GPL(nft_register_chain_type);
96518518 1451
32537e91 1452void nft_unregister_chain_type(const struct nft_chain_type *ctype)
96518518 1453{
96518518 1454 nfnl_lock(NFNL_SUBSYS_NFTABLES);
9370761c 1455 chain_type[ctype->family][ctype->type] = NULL;
96518518
PM		 1456 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1457}
9370761c 1458EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
96518518
PM		 1459
1460/*
1461 * Chains
1462 */
1463
1464static struct nft_chain *
cac20fcd 1465nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
96518518
PM		 1466{
1467 struct nft_chain *chain;
1468
1469 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1470 if (chain->handle == handle &&
1471 nft_active_genmask(chain, genmask))
96518518
PM		 1472 return chain;
1473 }
1474
1475 return ERR_PTR(-ENOENT);
1476}
1477
4d44175a 1478static bool lockdep_commit_lock_is_held(const struct net *net)
f102d66b
FW		 1479{
1480#ifdef CONFIG_PROVE_LOCKING
d59d2f82 1481 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 1482
1483 return lockdep_is_held(&nft_net->commit_mutex);
f102d66b
FW		 1484#else
1485 return true;
1486#endif
1487}
1488
1489static struct nft_chain *nft_chain_lookup(struct net *net,
1490 struct nft_table *table,
cac20fcd 1491 const struct nlattr *nla, u8 genmask)
96518518 1492{
1b2470e5
FW		 1493 char search[NFT_CHAIN_MAXNAMELEN + 1];
1494 struct rhlist_head *tmp, *list;
96518518
PM		 1495 struct nft_chain *chain;
1496
1497 if (nla == NULL)
1498 return ERR_PTR(-EINVAL);
1499
872f6903 1500 nla_strscpy(search, nla, sizeof(search));
96518518 1501
1b2470e5 1502 WARN_ON(!rcu_read_lock_held() &&
f102d66b 1503 !lockdep_commit_lock_is_held(net));
1b2470e5
FW		 1504
1505 chain = ERR_PTR(-ENOENT);
1506 rcu_read_lock();
1507 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1508 if (!list)
1509 goto out_unlock;
1510
1511 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1512 if (nft_active_genmask(chain, genmask))
1513 goto out_unlock;
1514 }
1515 chain = ERR_PTR(-ENOENT);
1516out_unlock:
1517 rcu_read_unlock();
1518 return chain;
96518518
PM		 1519}
1520
1521static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
b2fbd044
LZ		 1522 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1523 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 1524 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1525 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1526 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1527 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
0ca743a5 1528 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
9332d27d
FW		 1529 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1530 .len = NFT_MODULE_AUTOLOAD_LIMIT },
0ca743a5 1531 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
c9626a2c 1532 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
74cccc3d 1533 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
002f2176
JGG		 1534 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1535 .len = NFT_USERDATA_MAXLEN },
96518518
PM		 1536};
1537
1538static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1539 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1540 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
2cbce139
PNA		 1541 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1542 .len = IFNAMSIZ - 1 },
96518518
PM		 1543};
1544
0ca743a5
PNA		 1545static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1546{
1547 struct nft_stats *cpu_stats, total;
1548 struct nlattr *nest;
ce355e20
ED		 1549 unsigned int seq;
1550 u64 pkts, bytes;
0ca743a5
PNA		 1551 int cpu;
1552
edbd82c5
FW		 1553 if (!stats)
1554 return 0;
1555
0ca743a5
PNA		 1556 memset(&total, 0, sizeof(total));
1557 for_each_possible_cpu(cpu) {
1558 cpu_stats = per_cpu_ptr(stats, cpu);
ce355e20 1559 do {
d120d1a6 1560 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
ce355e20
ED		 1561 pkts = cpu_stats->pkts;
1562 bytes = cpu_stats->bytes;
d120d1a6 1563 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
ce355e20
ED		 1564 total.pkts += pkts;
1565 total.bytes += bytes;
0ca743a5 1566 }
ae0be8de 1567 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
0ca743a5
PNA		 1568 if (nest == NULL)
1569 goto nla_put_failure;
1570
b46f6ded
ND		 1571 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1572 NFTA_COUNTER_PAD) ||
1573 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1574 NFTA_COUNTER_PAD))
0ca743a5
PNA		 1575 goto nla_put_failure;
1576
1577 nla_nest_end(skb, nest);
1578 return 0;
1579
1580nla_put_failure:
1581 return -ENOSPC;
1582}
1583
d54725cd 1584static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
b9703ed4
PNA		 1585 const struct nft_base_chain *basechain,
1586 const struct list_head *hook_list)
d54725cd
PNA		 1587{
1588 const struct nf_hook_ops *ops = &basechain->ops;
1589 struct nft_hook *hook, *first = NULL;
1590 struct nlattr *nest, *nest_devs;
1591 int n = 0;
1592
1593 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1594 if (nest == NULL)
1595 goto nla_put_failure;
1596 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1597 goto nla_put_failure;
1598 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1599 goto nla_put_failure;
1600
d3519cb8 1601 if (nft_base_chain_netdev(family, ops->hooknum)) {
d54725cd 1602 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
b9703ed4
PNA		 1603
1604 if (!hook_list)
1605 hook_list = &basechain->hook_list;
1606
1607 list_for_each_entry(hook, hook_list, list) {
d54725cd
PNA		 1608 if (!first)
1609 first = hook;
1610
1611 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1612 hook->ops.dev->name))
1613 goto nla_put_failure;
1614 n++;
1615 }
1616 nla_nest_end(skb, nest_devs);
1617
1618 if (n == 1 &&
1619 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1620 goto nla_put_failure;
1621 }
1622 nla_nest_end(skb, nest);
1623
1624 return 0;
1625nla_put_failure:
1626 return -1;
1627}
1628
84d7fce6
PNA		 1629static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1630 u32 portid, u32 seq, int event, u32 flags,
1631 int family, const struct nft_table *table,
b9703ed4
PNA		 1632 const struct nft_chain *chain,
1633 const struct list_head *hook_list)
96518518
PM		 1634{
1635 struct nlmsghdr *nlh;
96518518 1636
dedb67c4 1637 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 1638 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1639 NFNETLINK_V0, nft_base_seq(net));
1640 if (!nlh)
96518518
PM		 1641 goto nla_put_failure;
1642
28339b21
PNA		 1643 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name) ||
1644 nla_put_string(skb, NFTA_CHAIN_NAME, chain->name) ||
1645 nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
b46f6ded 1646 NFTA_CHAIN_PAD))
96518518 1647 goto nla_put_failure;
28339b21 1648
7d937b10 1649 if (event == NFT_MSG_DELCHAIN && !hook_list) {
28339b21
PNA		 1650 nlmsg_end(skb, nlh);
1651 return 0;
1652 }
96518518 1653
f323d954 1654 if (nft_is_base_chain(chain)) {
0ca743a5 1655 const struct nft_base_chain *basechain = nft_base_chain(chain);
edbd82c5 1656 struct nft_stats __percpu *stats;
0ca743a5 1657
b9703ed4 1658 if (nft_dump_basechain_hook(skb, family, basechain, hook_list))
2cbce139 1659 goto nla_put_failure;
9370761c 1660
0ca743a5
PNA		 1661 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1662 htonl(basechain->policy)))
1663 goto nla_put_failure;
1664
baae3e62
PM		 1665 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1666 goto nla_put_failure;
0ca743a5 1667
edbd82c5
FW		 1668 stats = rcu_dereference_check(basechain->stats,
1669 lockdep_commit_lock_is_held(net));
1670 if (nft_dump_stats(skb, stats))
0ca743a5 1671 goto nla_put_failure;
96518518
PM		 1672 }
1673
d0e2c7de
PNA		 1674 if (chain->flags &&
1675 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1676 goto nla_put_failure;
1677
0ca743a5
PNA		 1678 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1679 goto nla_put_failure;
1680
002f2176
JGG		 1681 if (chain->udata &&
1682 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1683 goto nla_put_failure;
1684
053c095a
JB		 1685 nlmsg_end(skb, nlh);
1686 return 0;
96518518
PM		 1687
1688nla_put_failure:
1689 nlmsg_trim(skb, nlh);
1690 return -1;
1691}
1692
b9703ed4
PNA		 1693static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event,
1694 const struct list_head *hook_list)
96518518 1695{
0854db2a 1696 struct nftables_pernet *nft_net;
96518518 1697 struct sk_buff *skb;
6fb721cf 1698 u16 flags = 0;
96518518
PM		 1699 int err;
1700
128ad332
PNA		 1701 if (!ctx->report &&
1702 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1703 return;
96518518 1704
96518518
PM		 1705 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1706 if (skb == NULL)
1707 goto err;
1708
6fb721cf
PNA		 1709 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1710 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1711
84d7fce6 1712 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1713 event, flags, ctx->family, ctx->table,
b9703ed4 1714 ctx->chain, hook_list);
96518518
PM		 1715 if (err < 0) {
1716 kfree_skb(skb);
1717 goto err;
1718 }
1719
d59d2f82 1720 nft_net = nft_pernet(ctx->net);
0854db2a 1721 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1722 return;
96518518 1723err:
25e94a99 1724 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1725}
1726
1727static int nf_tables_dump_chains(struct sk_buff *skb,
1728 struct netlink_callback *cb)
1729{
1730 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
96518518 1731 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1732 struct net *net = sock_net(skb->sk);
96518518 1733 int family = nfmsg->nfgen_family;
0854db2a 1734 struct nftables_pernet *nft_net;
d59d2f82
PNA		 1735 const struct nft_table *table;
1736 const struct nft_chain *chain;
96518518 1737
e688a7f8 1738 rcu_read_lock();
d59d2f82 1739 nft_net = nft_pernet(net);
34002783 1740 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1741
0854db2a 1742 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1743 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1744 continue;
1745
36596dad
PNA		 1746 list_for_each_entry_rcu(chain, &table->chains, list) {
1747 if (idx < s_idx)
1748 goto cont;
1749 if (idx > s_idx)
1750 memset(&cb->args[1], 0,
1751 sizeof(cb->args) - sizeof(cb->args[0]));
1752 if (!nft_is_active(net, chain))
1753 continue;
1754 if (nf_tables_fill_chain_info(skb, net,
1755 NETLINK_CB(cb->skb).portid,
1756 cb->nlh->nlmsg_seq,
1757 NFT_MSG_NEWCHAIN,
1758 NLM_F_MULTI,
98319cb9 1759 table->family, table,
b9703ed4 1760 chain, NULL) < 0)
36596dad 1761 goto done;
38e029f1 1762
36596dad 1763 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1764cont:
36596dad 1765 idx++;
96518518
PM		 1766 }
1767 }
1768done:
e688a7f8 1769 rcu_read_unlock();
96518518
PM		 1770 cb->args[0] = idx;
1771 return skb->len;
1772}
1773
d9adf22a 1774/* called with rcu_read_lock held */
797d4980
PNA		 1775static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1776 const struct nlattr * const nla[])
96518518 1777{
797d4980
PNA		 1778 struct netlink_ext_ack *extack = info->extack;
1779 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1780 u8 family = info->nfmsg->nfgen_family;
96518518 1781 const struct nft_chain *chain;
797d4980 1782 struct net *net = info->net;
1b2470e5 1783 struct nft_table *table;
96518518 1784 struct sk_buff *skb2;
96518518
PM		 1785 int err;
1786
797d4980 1787 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1788 struct netlink_dump_control c = {
1789 .dump = nf_tables_dump_chains,
d9adf22a 1790 .module = THIS_MODULE,
96518518 1791 };
d9adf22a 1792
797d4980 1793 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1794 }
1795
6001a930 1796 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
36dd1bcc
PNA		 1797 if (IS_ERR(table)) {
1798 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 1799 return PTR_ERR(table);
36dd1bcc 1800 }
96518518 1801
f102d66b 1802 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
36dd1bcc
PNA		 1803 if (IS_ERR(chain)) {
1804 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
96518518 1805 return PTR_ERR(chain);
36dd1bcc 1806 }
96518518 1807
d9adf22a 1808 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1809 if (!skb2)
1810 return -ENOMEM;
1811
84d7fce6 1812 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 1813 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
b9703ed4 1814 0, family, table, chain, NULL);
96518518 1815 if (err < 0)
ee921183 1816 goto err_fill_chain_info;
96518518 1817
ee921183 1818 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1819
ee921183 1820err_fill_chain_info:
96518518
PM		 1821 kfree_skb(skb2);
1822 return err;
1823}
1824
0ca743a5
PNA		 1825static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1826 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1827 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1828};
1829
ff3cd7b3 1830static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
0ca743a5
PNA		 1831{
1832 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1833 struct nft_stats __percpu *newstats;
1834 struct nft_stats *stats;
1835 int err;
1836
8cb08174
JB		 1837 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1838 nft_counter_policy, NULL);
0ca743a5 1839 if (err < 0)
ff3cd7b3 1840 return ERR_PTR(err);
0ca743a5
PNA		 1841
1842 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
ff3cd7b3 1843 return ERR_PTR(-EINVAL);
0ca743a5 1844
ce355e20 1845 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
0ca743a5 1846 if (newstats == NULL)
ff3cd7b3 1847 return ERR_PTR(-ENOMEM);
0ca743a5
PNA		 1848
1849 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1850 * are not exposed to userspace.
1851 */
e8781f70 1852 preempt_disable();
0ca743a5
PNA		 1853 stats = this_cpu_ptr(newstats);
1854 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
1855 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
e8781f70 1856 preempt_enable();
0ca743a5 1857
ff3cd7b3
PNA		 1858 return newstats;
1859}
1860
53315ac6 1861static void nft_chain_stats_replace(struct nft_trans *trans)
ff3cd7b3 1862{
53315ac6 1863 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
0befd061 1864
53315ac6 1865 if (!nft_trans_chain_stats(trans))
b88825de
PNA		 1866 return;
1867
b685b534
PM		 1868 nft_trans_chain_stats(trans) =
1869 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
1870 lockdep_commit_lock_is_held(trans->ctx.net));
53315ac6
FW		 1871
1872 if (!nft_trans_chain_stats(trans))
bbb8c61f 1873 static_branch_inc(&nft_counters_enabled);
0ca743a5
PNA		 1874}
1875
0cbc06b3
FW		 1876static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
1877{
2c865a8a
PNA		 1878 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
1879 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
0cbc06b3
FW		 1880
1881 if (g0 != g1)
1882 kvfree(g1);
1883 kvfree(g0);
1884
1885 /* should be NULL either via abort or via successful commit */
2c865a8a
PNA		 1886 WARN_ON_ONCE(chain->blob_next);
1887 kvfree(chain->blob_next);
0cbc06b3
FW		 1888}
1889
d0e2c7de 1890void nf_tables_chain_destroy(struct nft_ctx *ctx)
91c7b38d 1891{
43a605f2 1892 struct nft_chain *chain = ctx->chain;
d54725cd 1893 struct nft_hook *hook, *next;
43a605f2 1894
fa5950e4
FW		 1895 if (WARN_ON(chain->use > 0))
1896 return;
91c7b38d 1897
0cbc06b3
FW		 1898 /* no concurrent access possible anymore */
1899 nf_tables_chain_free_chain_rules(chain);
1900
f323d954 1901 if (nft_is_base_chain(chain)) {
2cbce139
PNA		 1902 struct nft_base_chain *basechain = nft_base_chain(chain);
1903
d3519cb8 1904 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
d54725cd
PNA		 1905 list_for_each_entry_safe(hook, next,
1906 &basechain->hook_list, list) {
1907 list_del_rcu(&hook->list);
1908 kfree_rcu(hook, rcu);
1909 }
1910 }
2cbce139 1911 module_put(basechain->type->owner);
4c05ec47 1912 if (rcu_access_pointer(basechain->stats)) {
9f08ea84 1913 static_branch_dec(&nft_counters_enabled);
4c05ec47
TY		 1914 free_percpu(rcu_dereference_raw(basechain->stats));
1915 }
b7263e07 1916 kfree(chain->name);
002f2176 1917 kfree(chain->udata);
2cbce139 1918 kfree(basechain);
91c7b38d 1919 } else {
b7263e07 1920 kfree(chain->name);
002f2176 1921 kfree(chain->udata);
91c7b38d
PNA		 1922 kfree(chain);
1923 }
1924}
1925
3f0465a9
PNA		 1926static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
1927 const struct nlattr *attr)
1928{
1929 struct net_device *dev;
1930 char ifname[IFNAMSIZ];
1931 struct nft_hook *hook;
1932 int err;
1933
33758c89 1934 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
3f0465a9
PNA		 1935 if (!hook) {
1936 err = -ENOMEM;
1937 goto err_hook_alloc;
1938 }
1939
872f6903 1940 nla_strscpy(ifname, attr, IFNAMSIZ);
42f1c271
PNA		 1941 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
1942 * indirectly serializing all the other holders of the commit_mutex with
1943 * the rtnl_mutex.
1944 */
3f0465a9
PNA		 1945 dev = __dev_get_by_name(net, ifname);
1946 if (!dev) {
1947 err = -ENOENT;
1948 goto err_hook_dev;
1949 }
1950 hook->ops.dev = dev;
1951
1952 return hook;
1953
1954err_hook_dev:
1955 kfree(hook);
1956err_hook_alloc:
1957 return ERR_PTR(err);
1958}
1959
abadb2f8
PNA		 1960static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
1961 const struct nft_hook *this)
b75a3e83
PNA		 1962{
1963 struct nft_hook *hook;
1964
1965 list_for_each_entry(hook, hook_list, list) {
1966 if (this->ops.dev == hook->ops.dev)
abadb2f8 1967 return hook;
b75a3e83
PNA		 1968 }
1969
abadb2f8 1970 return NULL;
b75a3e83
PNA		 1971}
1972
3f0465a9
PNA		 1973static int nf_tables_parse_netdev_hooks(struct net *net,
1974 const struct nlattr *attr,
c3c060ad
PNA		 1975 struct list_head *hook_list,
1976 struct netlink_ext_ack *extack)
3f0465a9
PNA		 1977{
1978 struct nft_hook *hook, *next;
1979 const struct nlattr *tmp;
1980 int rem, n = 0, err;
1981
1982 nla_for_each_nested(tmp, attr, rem) {
1983 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
1984 err = -EINVAL;
1985 goto err_hook;
1986 }
1987
1988 hook = nft_netdev_hook_alloc(net, tmp);
1989 if (IS_ERR(hook)) {
c3c060ad 1990 NL_SET_BAD_ATTR(extack, tmp);
3f0465a9
PNA		 1991 err = PTR_ERR(hook);
1992 goto err_hook;
1993 }
b75a3e83 1994 if (nft_hook_list_find(hook_list, hook)) {
c3c060ad 1995 NL_SET_BAD_ATTR(extack, tmp);
cd77e75b 1996 kfree(hook);
b75a3e83
PNA		 1997 err = -EEXIST;
1998 goto err_hook;
1999 }
3f0465a9
PNA		 2000 list_add_tail(&hook->list, hook_list);
2001 n++;
2002
cb662ac6 2003 if (n == NFT_NETDEVICE_MAX) {
3f0465a9
PNA		 2004 err = -EFBIG;
2005 goto err_hook;
2006 }
2007 }
3f0465a9
PNA		 2008
2009 return 0;
2010
2011err_hook:
2012 list_for_each_entry_safe(hook, next, hook_list, list) {
2013 list_del(&hook->list);
2014 kfree(hook);
2015 }
2016 return err;
2017}
2018
508f8ccd
PNA		 2019struct nft_chain_hook {
2020 u32 num;
84ba7dd7 2021 s32 priority;
32537e91 2022 const struct nft_chain_type *type;
d54725cd 2023 struct list_head list;
508f8ccd
PNA		 2024};
2025
207296f1 2026static int nft_chain_parse_netdev(struct net *net, struct nlattr *tb[],
c3c060ad 2027 struct list_head *hook_list,
207296f1 2028 struct netlink_ext_ack *extack, u32 flags)
d54725cd
PNA		 2029{
2030 struct nft_hook *hook;
2031 int err;
2032
2033 if (tb[NFTA_HOOK_DEV]) {
2034 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
c3c060ad
PNA		 2035 if (IS_ERR(hook)) {
2036 NL_SET_BAD_ATTR(extack, tb[NFTA_HOOK_DEV]);
d54725cd 2037 return PTR_ERR(hook);
c3c060ad 2038 }
d54725cd
PNA		 2039
2040 list_add_tail(&hook->list, hook_list);
2041 } else if (tb[NFTA_HOOK_DEVS]) {
2042 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
c3c060ad 2043 hook_list, extack);
d54725cd
PNA		 2044 if (err < 0)
2045 return err;
05abe445 2046
d54725cd
PNA		 2047 }
2048
207296f1
PNA		 2049 if (flags & NFT_CHAIN_HW_OFFLOAD &&
2050 list_empty(hook_list))
2051 return -EINVAL;
2052
d54725cd
PNA		 2053 return 0;
2054}
2055
508f8ccd 2056static int nft_chain_parse_hook(struct net *net,
b9703ed4 2057 struct nft_base_chain *basechain,
508f8ccd 2058 const struct nlattr * const nla[],
36596dad 2059 struct nft_chain_hook *hook, u8 family,
207296f1 2060 u32 flags, struct netlink_ext_ack *extack)
508f8ccd 2061{
d59d2f82 2062 struct nftables_pernet *nft_net = nft_pernet(net);
508f8ccd 2063 struct nlattr *ha[NFTA_HOOK_MAX + 1];
32537e91 2064 const struct nft_chain_type *type;
508f8ccd
PNA		 2065 int err;
2066
0854db2a 2067 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b
FW		 2068 lockdep_nfnl_nft_mutex_not_held();
2069
8cb08174
JB		 2070 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2071 nla[NFTA_CHAIN_HOOK],
2072 nft_hook_policy, NULL);
508f8ccd
PNA		 2073 if (err < 0)
2074 return err;
2075
b9703ed4
PNA		 2076 if (!basechain) {
2077 if (!ha[NFTA_HOOK_HOOKNUM] ||
8509f62b
PNA		 2078 !ha[NFTA_HOOK_PRIORITY]) {
2079 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2080 return -ENOENT;
2081 }
508f8ccd 2082
b9703ed4
PNA		 2083 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2084 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
508f8ccd 2085
b9703ed4
PNA		 2086 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2087 if (!type)
2088 return -EOPNOTSUPP;
82603549 2089
b9703ed4
PNA		 2090 if (nla[NFTA_CHAIN_TYPE]) {
2091 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
2092 family, true);
2093 if (IS_ERR(type)) {
2094 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2095 return PTR_ERR(type);
2096 }
983c4fcb 2097 }
b9703ed4
PNA		 2098 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
2099 return -EOPNOTSUPP;
84ba7dd7 2100
b9703ed4
PNA		 2101 if (type->type == NFT_CHAIN_T_NAT &&
2102 hook->priority <= NF_IP_PRI_CONNTRACK)
2103 return -EOPNOTSUPP;
2104 } else {
2105 if (ha[NFTA_HOOK_HOOKNUM]) {
2106 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2107 if (hook->num != basechain->ops.hooknum)
2108 return -EOPNOTSUPP;
2109 }
2110 if (ha[NFTA_HOOK_PRIORITY]) {
2111 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2112 if (hook->priority != basechain->ops.priority)
2113 return -EOPNOTSUPP;
2114 }
2115
2116 type = basechain->type;
2117 }
84ba7dd7 2118
983c4fcb
PNA		 2119 if (!try_module_get(type->owner)) {
2120 if (nla[NFTA_CHAIN_TYPE])
2121 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
508f8ccd 2122 return -ENOENT;
983c4fcb 2123 }
508f8ccd
PNA		 2124
2125 hook->type = type;
2126
d54725cd 2127 INIT_LIST_HEAD(&hook->list);
d3519cb8 2128 if (nft_base_chain_netdev(family, hook->num)) {
207296f1 2129 err = nft_chain_parse_netdev(net, ha, &hook->list, extack, flags);
d54725cd 2130 if (err < 0) {
508f8ccd 2131 module_put(type->owner);
d54725cd 2132 return err;
508f8ccd 2133 }
d54725cd 2134 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
508f8ccd
PNA		 2135 module_put(type->owner);
2136 return -EOPNOTSUPP;
2137 }
2138
2139 return 0;
2140}
2141
2142static void nft_chain_release_hook(struct nft_chain_hook *hook)
2143{
d54725cd
PNA		 2144 struct nft_hook *h, *next;
2145
2146 list_for_each_entry_safe(h, next, &hook->list, list) {
2147 list_del(&h->list);
2148 kfree(h);
2149 }
508f8ccd 2150 module_put(hook->type->owner);
508f8ccd
PNA		 2151}
2152
e38fbfa9 2153static void nft_last_rule(const struct nft_chain *chain, const void *ptr)
0cbc06b3 2154{
e38fbfa9
FW		 2155 struct nft_rule_dp_last *lrule;
2156
2157 BUILD_BUG_ON(offsetof(struct nft_rule_dp_last, end) != 0);
2c865a8a 2158
e38fbfa9
FW		 2159 lrule = (struct nft_rule_dp_last *)ptr;
2160 lrule->end.is_last = 1;
2161 lrule->chain = chain;
2c865a8a
PNA		 2162 /* blob size does not include the trailer rule */
2163}
2164
e38fbfa9
FW		 2165static struct nft_rule_blob *nf_tables_chain_alloc_rules(const struct nft_chain *chain,
2166 unsigned int size)
2c865a8a
PNA		 2167{
2168 struct nft_rule_blob *blob;
2169
2c865a8a 2170 if (size > INT_MAX)
0cbc06b3
FW		 2171 return NULL;
2172
e38fbfa9
FW		 2173 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rule_dp_last);
2174
33758c89 2175 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2c865a8a 2176 if (!blob)
0cbc06b3
FW		 2177 return NULL;
2178
2c865a8a 2179 blob->size = 0;
e38fbfa9 2180 nft_last_rule(chain, blob->data);
0cbc06b3 2181
2c865a8a 2182 return blob;
0cbc06b3
FW		 2183}
2184
d54725cd
PNA		 2185static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2186 const struct nft_chain_hook *hook,
2187 struct nft_chain *chain)
2188{
c5c6accd
FW		 2189 ops->pf = family;
2190 ops->hooknum = hook->num;
2191 ops->priority = hook->priority;
2192 ops->priv = chain;
2193 ops->hook = hook->type->hooks[ops->hooknum];
2194 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
d54725cd
PNA		 2195}
2196
2197static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2198 struct nft_chain_hook *hook, u32 flags)
2199{
2200 struct nft_chain *chain;
2201 struct nft_hook *h;
2202
2203 basechain->type = hook->type;
2204 INIT_LIST_HEAD(&basechain->hook_list);
2205 chain = &basechain->chain;
2206
d3519cb8 2207 if (nft_base_chain_netdev(family, hook->num)) {
d54725cd
PNA		 2208 list_splice_init(&hook->list, &basechain->hook_list);
2209 list_for_each_entry(h, &basechain->hook_list, list)
2210 nft_basechain_hook_init(&h->ops, family, hook, chain);
d54725cd 2211 }
b9703ed4 2212 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
d54725cd 2213
67c49de4 2214 chain->flags |= NFT_CHAIN_BASE | flags;
d54725cd
PNA		 2215 basechain->policy = NF_ACCEPT;
2216 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
77972a36
PNA		 2217 !nft_chain_offload_support(basechain)) {
2218 list_splice_init(&basechain->hook_list, &hook->list);
d54725cd 2219 return -EOPNOTSUPP;
77972a36 2220 }
d54725cd
PNA		 2221
2222 flow_block_init(&basechain->flow_block);
2223
2224 return 0;
2225}
2226
04b7db41
PNA		 2227static int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
2228{
2229 int err;
2230
2231 err = rhltable_insert_key(&table->chains_ht, chain->name,
2232 &chain->rhlhead, nft_chain_ht_params);
2233 if (err)
2234 return err;
2235
2236 list_add_tail_rcu(&chain->list, &table->chains);
2237
2238 return 0;
2239}
2240
d0e2c7de
PNA		 2241static u64 chain_id;
2242
4035285f 2243static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
983c4fcb
PNA		 2244 u8 policy, u32 flags,
2245 struct netlink_ext_ack *extack)
4035285f
PNA		 2246{
2247 const struct nlattr * const *nla = ctx->nla;
2248 struct nft_table *table = ctx->table;
4035285f 2249 struct nft_base_chain *basechain;
4035285f 2250 struct net *net = ctx->net;
d0e2c7de 2251 char name[NFT_NAME_MAXLEN];
2c865a8a 2252 struct nft_rule_blob *blob;
66293c46 2253 struct nft_trans *trans;
4035285f 2254 struct nft_chain *chain;
4035285f
PNA		 2255 int err;
2256
2257 if (table->use == UINT_MAX)
2258 return -EOVERFLOW;
2259
2260 if (nla[NFTA_CHAIN_HOOK]) {
921ebde3 2261 struct nft_stats __percpu *stats = NULL;
b9703ed4 2262 struct nft_chain_hook hook = {};
4035285f 2263
d0e2c7de
PNA		 2264 if (flags & NFT_CHAIN_BINDING)
2265 return -EOPNOTSUPP;
2266
207296f1 2267 err = nft_chain_parse_hook(net, NULL, nla, &hook, family, flags,
b9703ed4 2268 extack);
4035285f
PNA		 2269 if (err < 0)
2270 return err;
2271
33758c89 2272 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2273 if (basechain == NULL) {
2274 nft_chain_release_hook(&hook);
2275 return -ENOMEM;
2276 }
d54725cd 2277 chain = &basechain->chain;
4035285f
PNA		 2278
2279 if (nla[NFTA_CHAIN_COUNTERS]) {
2280 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2281 if (IS_ERR(stats)) {
2282 nft_chain_release_hook(&hook);
2283 kfree(basechain);
2284 return PTR_ERR(stats);
2285 }
4c05ec47 2286 rcu_assign_pointer(basechain->stats, stats);
4035285f
PNA		 2287 }
2288
d54725cd
PNA		 2289 err = nft_basechain_init(basechain, family, &hook, flags);
2290 if (err < 0) {
2291 nft_chain_release_hook(&hook);
2292 kfree(basechain);
9a4d6dd5 2293 free_percpu(stats);
d54725cd
PNA		 2294 return err;
2295 }
921ebde3
TH		 2296 if (stats)
2297 static_branch_inc(&nft_counters_enabled);
4035285f 2298 } else {
d0e2c7de
PNA		 2299 if (flags & NFT_CHAIN_BASE)
2300 return -EINVAL;
2301 if (flags & NFT_CHAIN_HW_OFFLOAD)
2302 return -EOPNOTSUPP;
2303
33758c89 2304 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2305 if (chain == NULL)
2306 return -ENOMEM;
d0e2c7de
PNA		 2307
2308 chain->flags = flags;
4035285f 2309 }
43a605f2
PNA		 2310 ctx->chain = chain;
2311
4035285f
PNA		 2312 INIT_LIST_HEAD(&chain->rules);
2313 chain->handle = nf_tables_alloc_handle(table);
2314 chain->table = table;
d0e2c7de
PNA		 2315
2316 if (nla[NFTA_CHAIN_NAME]) {
33758c89 2317 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
d0e2c7de 2318 } else {
59136aa3
FW		 2319 if (!(flags & NFT_CHAIN_BINDING)) {
2320 err = -EINVAL;
002f2176 2321 goto err_destroy_chain;
59136aa3 2322 }
d0e2c7de
PNA		 2323
2324 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
33758c89 2325 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
d0e2c7de
PNA		 2326 }
2327
4035285f
PNA		 2328 if (!chain->name) {
2329 err = -ENOMEM;
002f2176
JGG		 2330 goto err_destroy_chain;
2331 }
2332
2333 if (nla[NFTA_CHAIN_USERDATA]) {
33758c89 2334 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
002f2176
JGG		 2335 if (chain->udata == NULL) {
2336 err = -ENOMEM;
2337 goto err_destroy_chain;
2338 }
2339 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
4035285f
PNA		 2340 }
2341
e38fbfa9 2342 blob = nf_tables_chain_alloc_rules(chain, 0);
2c865a8a 2343 if (!blob) {
0cbc06b3 2344 err = -ENOMEM;
002f2176 2345 goto err_destroy_chain;
0cbc06b3
FW		 2346 }
2347
2c865a8a
PNA		 2348 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2349 RCU_INIT_POINTER(chain->blob_gen_1, blob);
0cbc06b3 2350
c974a3a3 2351 err = nf_tables_register_hook(net, table, chain);
4035285f 2352 if (err < 0)
002f2176 2353 goto err_destroy_chain;
4035285f 2354
66293c46
FW		 2355 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2356 if (IS_ERR(trans)) {
2357 err = PTR_ERR(trans);
002f2176 2358 goto err_unregister_hook;
1b2470e5 2359 }
4035285f 2360
ad652f38 2361 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
66293c46
FW		 2362 if (nft_is_base_chain(chain))
2363 nft_trans_chain_policy(trans) = policy;
2364
04b7db41
PNA		 2365 err = nft_chain_add(table, chain);
2366 if (err < 0) {
2367 nft_trans_destroy(trans);
002f2176 2368 goto err_unregister_hook;
04b7db41
PNA		 2369 }
2370
4035285f 2371 table->use++;
4035285f
PNA		 2372
2373 return 0;
002f2176 2374err_unregister_hook:
c974a3a3 2375 nf_tables_unregister_hook(net, table, chain);
002f2176 2376err_destroy_chain:
43a605f2 2377 nf_tables_chain_destroy(ctx);
4035285f
PNA		 2378
2379 return err;
2380}
2381
c9626a2c 2382static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
98a381a7
PNA		 2383 u32 flags, const struct nlattr *attr,
2384 struct netlink_ext_ack *extack)
2c4a488a
PNA		 2385{
2386 const struct nlattr * const *nla = ctx->nla;
b9703ed4 2387 struct nft_base_chain *basechain = NULL;
2c4a488a
PNA		 2388 struct nft_table *table = ctx->table;
2389 struct nft_chain *chain = ctx->chain;
b9703ed4 2390 struct nft_chain_hook hook = {};
2c4a488a 2391 struct nft_stats *stats = NULL;
b9703ed4 2392 struct nft_hook *h, *next;
2c4a488a
PNA		 2393 struct nf_hook_ops *ops;
2394 struct nft_trans *trans;
b9703ed4 2395 bool unregister = false;
c974a3a3 2396 int err;
2c4a488a 2397
c9626a2c
PNA		 2398 if (chain->flags ^ flags)
2399 return -EOPNOTSUPP;
2400
b9703ed4
PNA		 2401 INIT_LIST_HEAD(&hook.list);
2402
2c4a488a 2403 if (nla[NFTA_CHAIN_HOOK]) {
98a381a7
PNA		 2404 if (!nft_is_base_chain(chain)) {
2405 NL_SET_BAD_ATTR(extack, attr);
77a92189 2406 return -EEXIST;
98a381a7 2407 }
b9703ed4
PNA		 2408
2409 basechain = nft_base_chain(chain);
2410 err = nft_chain_parse_hook(ctx->net, basechain, nla, &hook,
207296f1 2411 ctx->family, flags, extack);
2c4a488a
PNA		 2412 if (err < 0)
2413 return err;
2414
2c4a488a
PNA		 2415 if (basechain->type != hook.type) {
2416 nft_chain_release_hook(&hook);
98a381a7 2417 NL_SET_BAD_ATTR(extack, attr);
77a92189 2418 return -EEXIST;
2c4a488a
PNA		 2419 }
2420
b9703ed4
PNA		 2421 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2422 list_for_each_entry_safe(h, next, &hook.list, list) {
2423 h->ops.pf = basechain->ops.pf;
2424 h->ops.hooknum = basechain->ops.hooknum;
2425 h->ops.priority = basechain->ops.priority;
2426 h->ops.priv = basechain->ops.priv;
2427 h->ops.hook = basechain->ops.hook;
2428
2429 if (nft_hook_list_find(&basechain->hook_list, h)) {
2430 list_del(&h->list);
2431 kfree(h);
2432 }
d54725cd
PNA		 2433 }
2434 } else {
2435 ops = &basechain->ops;
2436 if (ops->hooknum != hook.num ||
2437 ops->priority != hook.priority) {
2438 nft_chain_release_hook(&hook);
98a381a7 2439 NL_SET_BAD_ATTR(extack, attr);
77a92189 2440 return -EEXIST;
d54725cd 2441 }
2c4a488a 2442 }
2c4a488a
PNA		 2443 }
2444
2445 if (nla[NFTA_CHAIN_HANDLE] &&
2446 nla[NFTA_CHAIN_NAME]) {
2447 struct nft_chain *chain2;
2448
f102d66b
FW		 2449 chain2 = nft_chain_lookup(ctx->net, table,
2450 nla[NFTA_CHAIN_NAME], genmask);
98a381a7
PNA		 2451 if (!IS_ERR(chain2)) {
2452 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
b9703ed4
PNA		 2453 err = -EEXIST;
2454 goto err_hooks;
98a381a7 2455 }
2c4a488a
PNA		 2456 }
2457
2458 if (nla[NFTA_CHAIN_COUNTERS]) {
b9703ed4
PNA		 2459 if (!nft_is_base_chain(chain)) {
2460 err = -EOPNOTSUPP;
2461 goto err_hooks;
2462 }
2c4a488a
PNA		 2463
2464 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
b9703ed4
PNA		 2465 if (IS_ERR(stats)) {
2466 err = PTR_ERR(stats);
2467 goto err_hooks;
2468 }
2c4a488a
PNA		 2469 }
2470
b9703ed4
PNA		 2471 if (!(table->flags & NFT_TABLE_F_DORMANT) &&
2472 nft_is_base_chain(chain) &&
2473 !list_empty(&hook.list)) {
2474 basechain = nft_base_chain(chain);
2475 ops = &basechain->ops;
2476
2477 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {
2478 err = nft_netdev_register_hooks(ctx->net, &hook.list);
2479 if (err < 0)
2480 goto err_hooks;
2481 }
2482 }
2483
2484 unregister = true;
c6cc94df 2485 err = -ENOMEM;
2c4a488a
PNA		 2486 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2487 sizeof(struct nft_trans_chain));
c6cc94df 2488 if (trans == NULL)
b9703ed4 2489 goto err_trans;
2c4a488a
PNA		 2490
2491 nft_trans_chain_stats(trans) = stats;
2492 nft_trans_chain_update(trans) = true;
2493
2494 if (nla[NFTA_CHAIN_POLICY])
2495 nft_trans_chain_policy(trans) = policy;
2496 else
2497 nft_trans_chain_policy(trans) = -1;
2498
c6cc94df
FW		 2499 if (nla[NFTA_CHAIN_HANDLE] &&
2500 nla[NFTA_CHAIN_NAME]) {
d59d2f82 2501 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c6cc94df
FW		 2502 struct nft_trans *tmp;
2503 char *name;
2504
2505 err = -ENOMEM;
33758c89 2506 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
c6cc94df 2507 if (!name)
b9703ed4 2508 goto err_trans;
c6cc94df
FW		 2509
2510 err = -EEXIST;
0854db2a 2511 list_for_each_entry(tmp, &nft_net->commit_list, list) {
c6cc94df
FW		 2512 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2513 tmp->ctx.table == table &&
2514 nft_trans_chain_update(tmp) &&
2515 nft_trans_chain_name(tmp) &&
2516 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
98a381a7 2517 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
c6cc94df 2518 kfree(name);
b9703ed4 2519 goto err_trans;
c6cc94df 2520 }
2c4a488a 2521 }
c6cc94df
FW		 2522
2523 nft_trans_chain_name(trans) = name;
2c4a488a 2524 }
b9703ed4
PNA		 2525
2526 nft_trans_basechain(trans) = basechain;
2527 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2528 list_splice(&hook.list, &nft_trans_chain_hooks(trans));
2529
0854db2a 2530 nft_trans_commit_list_add_tail(ctx->net, trans);
2c4a488a
PNA		 2531
2532 return 0;
b9703ed4
PNA		 2533
2534err_trans:
c6cc94df
FW		 2535 free_percpu(stats);
2536 kfree(trans);
b9703ed4
PNA		 2537err_hooks:
2538 if (nla[NFTA_CHAIN_HOOK]) {
2539 list_for_each_entry_safe(h, next, &hook.list, list) {
2540 if (unregister)
2541 nf_unregister_net_hook(ctx->net, &h->ops);
2542 list_del(&h->list);
2543 kfree_rcu(h, rcu);
2544 }
2545 module_put(hook.type->owner);
2546 }
2547
c6cc94df 2548 return err;
2c4a488a
PNA		 2549}
2550
837830a4 2551static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
95f466d2 2552 const struct nft_table *table,
837830a4
PNA		 2553 const struct nlattr *nla)
2554{
d59d2f82 2555 struct nftables_pernet *nft_net = nft_pernet(net);
837830a4
PNA		 2556 u32 id = ntohl(nla_get_be32(nla));
2557 struct nft_trans *trans;
2558
0854db2a 2559 list_for_each_entry(trans, &nft_net->commit_list, list) {
837830a4
PNA		 2560 struct nft_chain *chain = trans->ctx.chain;
2561
2562 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
95f466d2 2563 chain->table == table &&
837830a4
PNA		 2564 id == nft_trans_chain_id(trans))
2565 return chain;
2566 }
2567 return ERR_PTR(-ENOENT);
2568}
2569
7dab8ee3
PNA		 2570static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2571 const struct nlattr * const nla[])
96518518 2572{
7dab8ee3 2573 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 2574 struct netlink_ext_ack *extack = info->extack;
2575 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2576 u8 family = info->nfmsg->nfgen_family;
74cccc3d 2577 struct nft_chain *chain = NULL;
7dab8ee3 2578 struct net *net = info->net;
36dd1bcc 2579 const struct nlattr *attr;
96518518 2580 struct nft_table *table;
57de2a0c 2581 u8 policy = NF_ACCEPT;
4035285f 2582 struct nft_ctx ctx;
96518518 2583 u64 handle = 0;
c9626a2c 2584 u32 flags = 0;
96518518 2585
0854db2a 2586 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 2587
6001a930
PNA		 2588 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2589 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2590 if (IS_ERR(table)) {
2591 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2592 return PTR_ERR(table);
36dd1bcc 2593 }
96518518 2594
96518518 2595 chain = NULL;
36dd1bcc 2596 attr = nla[NFTA_CHAIN_NAME];
96518518
PM		 2597
2598 if (nla[NFTA_CHAIN_HANDLE]) {
2599 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
cac20fcd 2600 chain = nft_chain_lookup_byhandle(table, handle, genmask);
36dd1bcc
PNA		 2601 if (IS_ERR(chain)) {
2602 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
96518518 2603 return PTR_ERR(chain);
36dd1bcc
PNA		 2604 }
2605 attr = nla[NFTA_CHAIN_HANDLE];
74cccc3d 2606 } else if (nla[NFTA_CHAIN_NAME]) {
f102d66b 2607 chain = nft_chain_lookup(net, table, attr, genmask);
96518518 2608 if (IS_ERR(chain)) {
36dd1bcc
PNA		 2609 if (PTR_ERR(chain) != -ENOENT) {
2610 NL_SET_BAD_ATTR(extack, attr);
96518518 2611 return PTR_ERR(chain);
36dd1bcc 2612 }
96518518
PM		 2613 chain = NULL;
2614 }
74cccc3d
PNA		 2615 } else if (!nla[NFTA_CHAIN_ID]) {
2616 return -EINVAL;
96518518
PM		 2617 }
2618
57de2a0c 2619 if (nla[NFTA_CHAIN_POLICY]) {
f323d954 2620 if (chain != NULL &&
36dd1bcc
PNA		 2621 !nft_is_base_chain(chain)) {
2622 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
d6b6cb1d 2623 return -EOPNOTSUPP;
36dd1bcc 2624 }
d6b6cb1d
PNA		 2625
2626 if (chain == NULL &&
36dd1bcc
PNA		 2627 nla[NFTA_CHAIN_HOOK] == NULL) {
2628 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
57de2a0c 2629 return -EOPNOTSUPP;
36dd1bcc 2630 }
57de2a0c 2631
8f46df18 2632 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
57de2a0c
PM		 2633 switch (policy) {
2634 case NF_DROP:
2635 case NF_ACCEPT:
2636 break;
2637 default:
2638 return -EINVAL;
2639 }
2640 }
2641
c9626a2c
PNA		 2642 if (nla[NFTA_CHAIN_FLAGS])
2643 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
b717273d
FW		 2644 else if (chain)
2645 flags = chain->flags;
c9626a2c 2646
c1f79a2e
PNA		 2647 if (flags & ~NFT_CHAIN_FLAGS)
2648 return -EOPNOTSUPP;
2649
7dab8ee3 2650 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4035285f 2651
96518518 2652 if (chain != NULL) {
5dc52d83
PNA		 2653 if (chain->flags & NFT_CHAIN_BINDING)
2654 return -EINVAL;
2655
7dab8ee3 2656 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 2657 NL_SET_BAD_ATTR(extack, attr);
96518518 2658 return -EEXIST;
36dd1bcc 2659 }
7dab8ee3 2660 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 2661 return -EOPNOTSUPP;
2662
67c49de4 2663 flags |= chain->flags & NFT_CHAIN_BASE;
98a381a7
PNA		 2664 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2665 extack);
96518518
PM		 2666 }
2667
983c4fcb 2668 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
96518518
PM		 2669}
2670
7d937b10
PNA		 2671static int nft_delchain_hook(struct nft_ctx *ctx, struct nft_chain *chain,
2672 struct netlink_ext_ack *extack)
2673{
2674 const struct nlattr * const *nla = ctx->nla;
2675 struct nft_chain_hook chain_hook = {};
2676 struct nft_base_chain *basechain;
2677 struct nft_hook *this, *hook;
2678 LIST_HEAD(chain_del_list);
2679 struct nft_trans *trans;
2680 int err;
2681
2682 if (!nft_is_base_chain(chain))
2683 return -EOPNOTSUPP;
2684
2685 basechain = nft_base_chain(chain);
2686 err = nft_chain_parse_hook(ctx->net, basechain, nla, &chain_hook,
207296f1 2687 ctx->family, chain->flags, extack);
7d937b10
PNA		 2688 if (err < 0)
2689 return err;
2690
2691 list_for_each_entry(this, &chain_hook.list, list) {
2692 hook = nft_hook_list_find(&basechain->hook_list, this);
2693 if (!hook) {
2694 err = -ENOENT;
2695 goto err_chain_del_hook;
2696 }
2697 list_move(&hook->list, &chain_del_list);
2698 }
2699
2700 trans = nft_trans_alloc(ctx, NFT_MSG_DELCHAIN,
2701 sizeof(struct nft_trans_chain));
2702 if (!trans) {
2703 err = -ENOMEM;
2704 goto err_chain_del_hook;
2705 }
2706
2707 nft_trans_basechain(trans) = basechain;
2708 nft_trans_chain_update(trans) = true;
2709 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2710 list_splice(&chain_del_list, &nft_trans_chain_hooks(trans));
2711 nft_chain_release_hook(&chain_hook);
2712
2713 nft_trans_commit_list_add_tail(ctx->net, trans);
2714
2715 return 0;
2716
2717err_chain_del_hook:
2718 list_splice(&chain_del_list, &basechain->hook_list);
2719 nft_chain_release_hook(&chain_hook);
2720
2721 return err;
2722}
2723
7dab8ee3
PNA		 2724static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2725 const struct nlattr * const nla[])
96518518 2726{
7dab8ee3
PNA		 2727 struct netlink_ext_ack *extack = info->extack;
2728 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2729 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 2730 struct net *net = info->net;
36dd1bcc 2731 const struct nlattr *attr;
96518518
PM		 2732 struct nft_table *table;
2733 struct nft_chain *chain;
9dee1474 2734 struct nft_rule *rule;
91c7b38d 2735 struct nft_ctx ctx;
3ecbfd65 2736 u64 handle;
9dee1474
PNA		 2737 u32 use;
2738 int err;
96518518 2739
6001a930
PNA		 2740 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2741 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2742 if (IS_ERR(table)) {
2743 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2744 return PTR_ERR(table);
36dd1bcc 2745 }
96518518 2746
3ecbfd65 2747 if (nla[NFTA_CHAIN_HANDLE]) {
36dd1bcc
PNA		 2748 attr = nla[NFTA_CHAIN_HANDLE];
2749 handle = be64_to_cpu(nla_get_be64(attr));
cac20fcd 2750 chain = nft_chain_lookup_byhandle(table, handle, genmask);
3ecbfd65 2751 } else {
36dd1bcc 2752 attr = nla[NFTA_CHAIN_NAME];
f102d66b 2753 chain = nft_chain_lookup(net, table, attr, genmask);
3ecbfd65 2754 }
36dd1bcc 2755 if (IS_ERR(chain)) {
f80a612d
FFM		 2756 if (PTR_ERR(chain) == -ENOENT &&
2757 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
2758 return 0;
2759
36dd1bcc 2760 NL_SET_BAD_ATTR(extack, attr);
96518518 2761 return PTR_ERR(chain);
36dd1bcc 2762 }
9dee1474 2763
7d937b10
PNA		 2764 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2765
2766 if (nla[NFTA_CHAIN_HOOK]) {
2767 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2768 return -EOPNOTSUPP;
2769
2770 return nft_delchain_hook(&ctx, chain, extack);
2771 }
2772
7dab8ee3 2773 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
9dee1474 2774 chain->use > 0)
96518518
PM		 2775 return -EBUSY;
2776
9dee1474
PNA		 2777 use = chain->use;
2778 list_for_each_entry(rule, &chain->rules, list) {
2779 if (!nft_is_active_next(net, rule))
2780 continue;
2781 use--;
2782
2783 err = nft_delrule(&ctx, rule);
2784 if (err < 0)
2785 return err;
2786 }
2787
2788 /* There are rules and elements that are still holding references to us,
2789 * we cannot do a recursive removal in this case.
2790 */
36dd1bcc
PNA		 2791 if (use > 0) {
2792 NL_SET_BAD_ATTR(extack, attr);
9dee1474 2793 return -EBUSY;
36dd1bcc 2794 }
9dee1474 2795
ee01d542 2796 return nft_delchain(&ctx);
96518518
PM		 2797}
2798
96518518
PM		 2799/*
2800 * Expressions
2801 */
2802
2803/**
ef1f7df9 2804 * nft_register_expr - register nf_tables expr type
3db86c39 2805 * @type: expr type
96518518 2806 *
ef1f7df9 2807 * Registers the expr type for use with nf_tables. Returns zero on
96518518
PM		 2808 * success or a negative errno code otherwise.
2809 */
ef1f7df9 2810int nft_register_expr(struct nft_expr_type *type)
96518518
PM		 2811{
2812 nfnl_lock(NFNL_SUBSYS_NFTABLES);
758dbcec 2813 if (type->family == NFPROTO_UNSPEC)
e688a7f8 2814 list_add_tail_rcu(&type->list, &nf_tables_expressions);
758dbcec 2815 else
e688a7f8 2816 list_add_rcu(&type->list, &nf_tables_expressions);
96518518
PM		 2817 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2818 return 0;
2819}
2820EXPORT_SYMBOL_GPL(nft_register_expr);
2821
2822/**
ef1f7df9 2823 * nft_unregister_expr - unregister nf_tables expr type
3db86c39 2824 * @type: expr type
96518518 2825 *
ef1f7df9 2826 * Unregisters the expr typefor use with nf_tables.
96518518 2827 */
ef1f7df9 2828void nft_unregister_expr(struct nft_expr_type *type)
96518518
PM		 2829{
2830 nfnl_lock(NFNL_SUBSYS_NFTABLES);
e688a7f8 2831 list_del_rcu(&type->list);
96518518
PM		 2832 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2833}
2834EXPORT_SYMBOL_GPL(nft_unregister_expr);
2835
64d46806
PM		 2836static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2837 struct nlattr *nla)
96518518 2838{
9cff126f 2839 const struct nft_expr_type *type, *candidate = NULL;
96518518 2840
ef1f7df9 2841 list_for_each_entry(type, &nf_tables_expressions, list) {
9cff126f
PNA		 2842 if (!nla_strcmp(nla, type->name)) {
2843 if (!type->family && !candidate)
2844 candidate = type;
2845 else if (type->family == family)
2846 candidate = type;
2847 }
96518518 2848 }
9cff126f 2849 return candidate;
96518518
PM		 2850}
2851
b9c04ae7
PNA		 2852#ifdef CONFIG_MODULES
2853static int nft_expr_type_request_module(struct net *net, u8 family,
2854 struct nlattr *nla)
2855{
eb014de4
PNA		 2856 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
2857 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
b9c04ae7
PNA		 2858 return -EAGAIN;
2859
2860 return 0;
2861}
2862#endif
2863
452238e8
FW		 2864static const struct nft_expr_type *nft_expr_type_get(struct net *net,
2865 u8 family,
64d46806 2866 struct nlattr *nla)
96518518 2867{
ef1f7df9 2868 const struct nft_expr_type *type;
96518518
PM		 2869
2870 if (nla == NULL)
2871 return ERR_PTR(-EINVAL);
2872
64d46806 2873 type = __nft_expr_type_get(family, nla);
ef1f7df9
PM		 2874 if (type != NULL && try_module_get(type->owner))
2875 return type;
96518518 2876
f102d66b 2877 lockdep_nfnl_nft_mutex_not_held();
96518518 2878#ifdef CONFIG_MODULES
ef1f7df9 2879 if (type == NULL) {
b9c04ae7 2880 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
64d46806
PM		 2881 return ERR_PTR(-EAGAIN);
2882
eb014de4
PNA		 2883 if (nft_request_module(net, "nft-expr-%.*s",
2884 nla_len(nla),
2885 (char *)nla_data(nla)) == -EAGAIN)
96518518
PM		 2886 return ERR_PTR(-EAGAIN);
2887 }
2888#endif
2889 return ERR_PTR(-ENOENT);
2890}
2891
2892static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
9332d27d
FW		 2893 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
2894 .len = NFT_MODULE_AUTOLOAD_LIMIT },
96518518
PM		 2895 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
2896};
2897
2898static int nf_tables_fill_expr_info(struct sk_buff *skb,
8daa8fde 2899 const struct nft_expr *expr, bool reset)
96518518 2900{
ef1f7df9 2901 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
96518518
PM		 2902 goto nla_put_failure;
2903
2904 if (expr->ops->dump) {
ae0be8de
MK		 2905 struct nlattr *data = nla_nest_start_noflag(skb,
2906 NFTA_EXPR_DATA);
96518518
PM		 2907 if (data == NULL)
2908 goto nla_put_failure;
8daa8fde 2909 if (expr->ops->dump(skb, expr, reset) < 0)
96518518
PM		 2910 goto nla_put_failure;
2911 nla_nest_end(skb, data);
2912 }
2913
2914 return skb->len;
2915
2916nla_put_failure:
2917 return -1;
2918};
2919
0b2d8a7b 2920int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
8daa8fde 2921 const struct nft_expr *expr, bool reset)
0b2d8a7b
PM		 2922{
2923 struct nlattr *nest;
2924
ae0be8de 2925 nest = nla_nest_start_noflag(skb, attr);
0b2d8a7b
PM		 2926 if (!nest)
2927 goto nla_put_failure;
8daa8fde 2928 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
0b2d8a7b
PM		 2929 goto nla_put_failure;
2930 nla_nest_end(skb, nest);
2931 return 0;
2932
2933nla_put_failure:
2934 return -1;
2935}
2936
96518518
PM		 2937struct nft_expr_info {
2938 const struct nft_expr_ops *ops;
83d9dcba 2939 const struct nlattr *attr;
ef1f7df9 2940 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
96518518
PM		 2941};
2942
0ca743a5
PNA		 2943static int nf_tables_expr_parse(const struct nft_ctx *ctx,
2944 const struct nlattr *nla,
96518518
PM		 2945 struct nft_expr_info *info)
2946{
ef1f7df9 2947 const struct nft_expr_type *type;
96518518 2948 const struct nft_expr_ops *ops;
ef1f7df9 2949 struct nlattr *tb[NFTA_EXPR_MAX + 1];
96518518
PM		 2950 int err;
2951
8cb08174
JB		 2952 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
2953 nft_expr_policy, NULL);
96518518
PM		 2954 if (err < 0)
2955 return err;
2956
452238e8 2957 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
ef1f7df9
PM		 2958 if (IS_ERR(type))
2959 return PTR_ERR(type);
2960
2961 if (tb[NFTA_EXPR_DATA]) {
8cb08174
JB		 2962 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
2963 tb[NFTA_EXPR_DATA],
2964 type->policy, NULL);
ef1f7df9
PM		 2965 if (err < 0)
2966 goto err1;
2967 } else
2968 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
2969
2970 if (type->select_ops != NULL) {
0ca743a5
PNA		 2971 ops = type->select_ops(ctx,
2972 (const struct nlattr * const *)info->tb);
ef1f7df9
PM		 2973 if (IS_ERR(ops)) {
2974 err = PTR_ERR(ops);
0ef1efd1
PNA		 2975#ifdef CONFIG_MODULES
2976 if (err == -EAGAIN)
eb014de4
PNA		 2977 if (nft_expr_type_request_module(ctx->net,
2978 ctx->family,
2979 tb[NFTA_EXPR_NAME]) != -EAGAIN)
2980 err = -ENOENT;
0ef1efd1 2981#endif
ef1f7df9
PM		 2982 goto err1;
2983 }
2984 } else
2985 ops = type->ops;
2986
83d9dcba 2987 info->attr = nla;
96518518 2988 info->ops = ops;
83d9dcba 2989
96518518 2990 return 0;
ef1f7df9
PM		 2991
2992err1:
2993 module_put(type->owner);
2994 return err;
96518518
PM		 2995}
2996
3a07327d
PNA		 2997int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
2998 struct nft_expr_info *info)
2999{
3000 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3001 const struct nft_expr_type *type;
3002 int err;
3003
3004 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3005 nft_expr_policy, NULL);
3006 if (err < 0)
3007 return err;
3008
3009 if (!tb[NFTA_EXPR_DATA])
3010 return -EINVAL;
3011
3012 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
98cbc40e
DC		 3013 if (!type)
3014 return -ENOENT;
3a07327d
PNA		 3015
3016 if (!type->inner_ops)
3017 return -EOPNOTSUPP;
3018
3019 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3020 tb[NFTA_EXPR_DATA],
3021 type->policy, NULL);
3022 if (err < 0)
3023 goto err_nla_parse;
3024
3025 info->attr = nla;
3026 info->ops = type->inner_ops;
3027
3028 return 0;
3029
3030err_nla_parse:
3031 return err;
3032}
3033
96518518 3034static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 3035 const struct nft_expr_info *expr_info,
96518518
PM		 3036 struct nft_expr *expr)
3037{
7dab8ee3 3038 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 3039 int err;
3040
3041 expr->ops = ops;
3042 if (ops->init) {
7dab8ee3 3043 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 3044 if (err < 0)
3045 goto err1;
3046 }
3047
96518518 3048 return 0;
96518518
PM		 3049err1:
3050 expr->ops = NULL;
3051 return err;
3052}
3053
62472bce
PM		 3054static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
3055 struct nft_expr *expr)
96518518 3056{
3f3a390d
PNA		 3057 const struct nft_expr_type *type = expr->ops->type;
3058
96518518 3059 if (expr->ops->destroy)
62472bce 3060 expr->ops->destroy(ctx, expr);
3f3a390d 3061 module_put(type->owner);
96518518
PM		 3062}
3063
795a6d6b
PNA		 3064static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
3065 const struct nlattr *nla)
0b2d8a7b 3066{
7dab8ee3 3067 struct nft_expr_info expr_info;
0b2d8a7b 3068 struct nft_expr *expr;
b8e20400 3069 struct module *owner;
0b2d8a7b
PM		 3070 int err;
3071
7dab8ee3 3072 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 3073 if (err < 0)
52077804
PNA		 3074 goto err_expr_parse;
3075
3076 err = -EOPNOTSUPP;
3077 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
3078 goto err_expr_stateful;
0b2d8a7b
PM		 3079
3080 err = -ENOMEM;
33758c89 3081 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 3082 if (expr == NULL)
52077804 3083 goto err_expr_stateful;
0b2d8a7b 3084
7dab8ee3 3085 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 3086 if (err < 0)
52077804 3087 goto err_expr_new;
0b2d8a7b
PM		 3088
3089 return expr;
52077804 3090err_expr_new:
6cafaf47 3091 kfree(expr);
52077804 3092err_expr_stateful:
7dab8ee3
PNA		 3093 owner = expr_info.ops->type->owner;
3094 if (expr_info.ops->type->release_ops)
3095 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 3096
3097 module_put(owner);
52077804 3098err_expr_parse:
0b2d8a7b
PM		 3099 return ERR_PTR(err);
3100}
3101
c604cc69
PNA		 3102int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
3103{
3104 int err;
3105
3106 if (src->ops->clone) {
3107 dst->ops = src->ops;
3108 err = src->ops->clone(dst, src);
3109 if (err < 0)
3110 return err;
3111 } else {
3112 memcpy(dst, src, src->ops->size);
3113 }
3114
3115 __module_get(src->ops->type->owner);
3116
3117 return 0;
3118}
3119
0b2d8a7b
PM		 3120void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
3121{
3122 nf_tables_expr_destroy(ctx, expr);
3123 kfree(expr);
3124}
3125
96518518
PM		 3126/*
3127 * Rules
3128 */
3129
cac20fcd
PNA		 3130static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
3131 u64 handle)
96518518
PM		 3132{
3133 struct nft_rule *rule;
3134
3135 // FIXME: this sucks
d9adf22a 3136 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 3137 if (handle == rule->handle)
3138 return rule;
3139 }
3140
3141 return ERR_PTR(-ENOENT);
3142}
3143
cac20fcd
PNA		 3144static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3145 const struct nlattr *nla)
96518518
PM		 3146{
3147 if (nla == NULL)
3148 return ERR_PTR(-EINVAL);
3149
cac20fcd 3150 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 3151}
3152
3153static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 3154 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3155 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 3156 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3157 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3158 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
3159 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
0ca743a5 3160 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 3161 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 3162 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3163 .len = NFT_USERDATA_MAXLEN },
467697d2 3164 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 3165 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 3166 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 3167};
3168
84d7fce6
PNA		 3169static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3170 u32 portid, u32 seq, int event,
3171 u32 flags, int family,
96518518
PM		 3172 const struct nft_table *table,
3173 const struct nft_chain *chain,
8daa8fde
PS		 3174 const struct nft_rule *rule, u64 handle,
3175 bool reset)
96518518
PM		 3176{
3177 struct nlmsghdr *nlh;
96518518
PM		 3178 const struct nft_expr *expr, *next;
3179 struct nlattr *list;
dedb67c4 3180 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3181
19c28b13
PNA		 3182 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3183 nft_base_seq(net));
3184 if (!nlh)
96518518
PM		 3185 goto nla_put_failure;
3186
96518518
PM		 3187 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3188 goto nla_put_failure;
3189 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3190 goto nla_put_failure;
b46f6ded
ND		 3191 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3192 NFTA_RULE_PAD))
96518518
PM		 3193 goto nla_put_failure;
3194
e189ae16
PNA		 3195 if (event != NFT_MSG_DELRULE && handle) {
3196 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3197 NFTA_RULE_PAD))
5e948466
EL		 3198 goto nla_put_failure;
3199 }
3200
b72920f6
PNA		 3201 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3202 nft_flow_rule_stats(chain, rule);
3203
ae0be8de 3204 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3205 if (list == NULL)
3206 goto nla_put_failure;
3207 nft_rule_for_each_expr(expr, next, rule) {
8daa8fde 3208 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
96518518 3209 goto nla_put_failure;
96518518
PM		 3210 }
3211 nla_nest_end(skb, list);
3212
86f1ec32
PM		 3213 if (rule->udata) {
3214 struct nft_userdata *udata = nft_userdata(rule);
3215 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3216 udata->data) < 0)
3217 goto nla_put_failure;
3218 }
0768b3b3 3219
053c095a
JB		 3220 nlmsg_end(skb, nlh);
3221 return 0;
96518518
PM		 3222
3223nla_put_failure:
3224 nlmsg_trim(skb, nlh);
3225 return -1;
3226}
3227
25e94a99
PNA		 3228static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3229 const struct nft_rule *rule, int event)
96518518 3230{
d59d2f82 3231 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3232 const struct nft_rule *prule;
96518518 3233 struct sk_buff *skb;
e189ae16
PNA		 3234 u64 handle = 0;
3235 u16 flags = 0;
96518518
PM		 3236 int err;
3237
128ad332
PNA		 3238 if (!ctx->report &&
3239 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3240 return;
96518518 3241
96518518
PM		 3242 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3243 if (skb == NULL)
3244 goto err;
3245
e189ae16
PNA		 3246 if (event == NFT_MSG_NEWRULE &&
3247 !list_is_first(&rule->list, &ctx->chain->rules) &&
3248 !list_is_last(&rule->list, &ctx->chain->rules)) {
3249 prule = list_prev_entry(rule, list);
3250 handle = prule->handle;
3251 }
3252 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3253 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3254 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3255 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3256
84d7fce6 3257 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16 3258 event, flags, ctx->family, ctx->table,
8daa8fde 3259 ctx->chain, rule, handle, false);
96518518
PM		 3260 if (err < 0) {
3261 kfree_skb(skb);
3262 goto err;
3263 }
3264
0854db2a 3265 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3266 return;
96518518 3267err:
25e94a99 3268 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3269}
3270
6e1f760e 3271struct nft_rule_dump_ctx {
e46abbcc 3272 char *table;
b7263e07 3273 char *chain;
6e1f760e
PNA		 3274};
3275
241faece
PS		 3276static int __nf_tables_dump_rules(struct sk_buff *skb,
3277 unsigned int *idx,
3278 struct netlink_callback *cb,
3279 const struct nft_table *table,
8daa8fde
PS		 3280 const struct nft_chain *chain,
3281 bool reset)
241faece
PS		 3282{
3283 struct net *net = sock_net(skb->sk);
2c82c7e7 3284 const struct nft_rule *rule, *prule;
241faece 3285 unsigned int s_idx = cb->args[0];
e189ae16 3286 u64 handle;
241faece 3287
2c82c7e7 3288 prule = NULL;
241faece
PS		 3289 list_for_each_entry_rcu(rule, &chain->rules, list) {
3290 if (!nft_is_active(net, rule))
2c82c7e7 3291 goto cont_skip;
241faece
PS		 3292 if (*idx < s_idx)
3293 goto cont;
3294 if (*idx > s_idx) {
3295 memset(&cb->args[1], 0,
3296 sizeof(cb->args) - sizeof(cb->args[0]));
3297 }
e189ae16
PNA		 3298 if (prule)
3299 handle = prule->handle;
3300 else
3301 handle = 0;
3302
241faece
PS		 3303 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3304 cb->nlh->nlmsg_seq,
3305 NFT_MSG_NEWRULE,
3306 NLM_F_MULTI | NLM_F_APPEND,
3307 table->family,
8daa8fde 3308 table, chain, rule, handle, reset) < 0)
310529e6 3309 return 1;
241faece
PS		 3310
3311 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3312cont:
2c82c7e7
FW		 3313 prule = rule;
3314cont_skip:
241faece
PS		 3315 (*idx)++;
3316 }
310529e6 3317 return 0;
241faece
PS		 3318}
3319
96518518
PM		 3320static int nf_tables_dump_rules(struct sk_buff *skb,
3321 struct netlink_callback *cb)
3322{
3323 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6e1f760e 3324 const struct nft_rule_dump_ctx *ctx = cb->data;
241faece 3325 struct nft_table *table;
96518518 3326 const struct nft_chain *chain;
241faece 3327 unsigned int idx = 0;
99633ab2 3328 struct net *net = sock_net(skb->sk);
96518518 3329 int family = nfmsg->nfgen_family;
0854db2a 3330 struct nftables_pernet *nft_net;
8daa8fde
PS		 3331 bool reset = false;
3332
3333 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3334 reset = true;
96518518 3335
e688a7f8 3336 rcu_read_lock();
d59d2f82 3337 nft_net = nft_pernet(net);
34002783 3338 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3339
0854db2a 3340 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3341 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3342 continue;
3343
3344 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3345 continue;
3346
715849ab 3347 if (ctx && ctx->table && ctx->chain) {
241faece 3348 struct rhlist_head *list, *tmp;
6e1f760e 3349
241faece
PS		 3350 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3351 nft_chain_ht_params);
3352 if (!list)
3353 goto done;
3354
3355 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3356 if (!nft_is_active(net, chain))
3357 continue;
3358 __nf_tables_dump_rules(skb, &idx,
8daa8fde 3359 cb, table, chain, reset);
241faece 3360 break;
96518518 3361 }
241faece 3362 goto done;
96518518 3363 }
241faece
PS		 3364
3365 list_for_each_entry_rcu(chain, &table->chains, list) {
8daa8fde
PS		 3366 if (__nf_tables_dump_rules(skb, &idx,
3367 cb, table, chain, reset))
241faece
PS		 3368 goto done;
3369 }
3370
3371 if (ctx && ctx->table)
3372 break;
96518518
PM		 3373 }
3374done:
e688a7f8 3375 rcu_read_unlock();
310529e6
PS		 3376
3377 cb->args[0] = idx;
96518518
PM		 3378 return skb->len;
3379}
3380
90fd131a
FW		 3381static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3382{
3383 const struct nlattr * const *nla = cb->data;
3384 struct nft_rule_dump_ctx *ctx = NULL;
3385
3386 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3387 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3388 if (!ctx)
3389 return -ENOMEM;
3390
3391 if (nla[NFTA_RULE_TABLE]) {
3392 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3393 GFP_ATOMIC);
3394 if (!ctx->table) {
3395 kfree(ctx);
3396 return -ENOMEM;
3397 }
3398 }
3399 if (nla[NFTA_RULE_CHAIN]) {
3400 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3401 GFP_ATOMIC);
3402 if (!ctx->chain) {
3403 kfree(ctx->table);
3404 kfree(ctx);
3405 return -ENOMEM;
3406 }
3407 }
3408 }
3409
3410 cb->data = ctx;
3411 return 0;
3412}
3413
6e1f760e
PNA		 3414static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3415{
e46abbcc
PS		 3416 struct nft_rule_dump_ctx *ctx = cb->data;
3417
3418 if (ctx) {
3419 kfree(ctx->table);
b7263e07 3420 kfree(ctx->chain);
e46abbcc
PS		 3421 kfree(ctx);
3422 }
6e1f760e
PNA		 3423 return 0;
3424}
3425
d9adf22a 3426/* called with rcu_read_lock held */
797d4980
PNA		 3427static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3428 const struct nlattr * const nla[])
96518518 3429{
797d4980
PNA		 3430 struct netlink_ext_ack *extack = info->extack;
3431 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3432 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3433 const struct nft_chain *chain;
3434 const struct nft_rule *rule;
797d4980 3435 struct net *net = info->net;
1b2470e5 3436 struct nft_table *table;
96518518 3437 struct sk_buff *skb2;
8daa8fde 3438 bool reset = false;
96518518
PM		 3439 int err;
3440
797d4980 3441 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518 3442 struct netlink_dump_control c = {
90fd131a 3443 .start= nf_tables_dump_rules_start,
96518518 3444 .dump = nf_tables_dump_rules,
6e1f760e 3445 .done = nf_tables_dump_rules_done,
d9adf22a 3446 .module = THIS_MODULE,
90fd131a 3447 .data = (void *)nla,
96518518 3448 };
6e1f760e 3449
797d4980 3450 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 3451 }
3452
6001a930 3453 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3454 if (IS_ERR(table)) {
3455 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3456 return PTR_ERR(table);
36dd1bcc 3457 }
96518518 3458
f102d66b 3459 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3460 if (IS_ERR(chain)) {
3461 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
96518518 3462 return PTR_ERR(chain);
36dd1bcc 3463 }
96518518 3464
cac20fcd 3465 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3466 if (IS_ERR(rule)) {
3467 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3468 return PTR_ERR(rule);
36dd1bcc 3469 }
96518518 3470
d9adf22a 3471 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 3472 if (!skb2)
3473 return -ENOMEM;
3474
8daa8fde
PS		 3475 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3476 reset = true;
3477
84d7fce6 3478 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 3479 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
8daa8fde 3480 family, table, chain, rule, 0, reset);
96518518 3481 if (err < 0)
ee921183 3482 goto err_fill_rule_info;
96518518 3483
ee921183 3484 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 3485
ee921183 3486err_fill_rule_info:
96518518
PM		 3487 kfree_skb(skb2);
3488 return err;
3489}
3490
62472bce
PM		 3491static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
3492 struct nft_rule *rule)
96518518 3493{
29e38801 3494 struct nft_expr *expr, *next;
96518518
PM		 3495
3496 /*
3497 * Careful: some expressions might not be initialized in case this
3498 * is called on error from nf_tables_newrule().
3499 */
3500 expr = nft_expr_first(rule);
31cc578a 3501 while (nft_expr_more(rule, expr)) {
29e38801 3502 next = nft_expr_next(expr);
62472bce 3503 nf_tables_expr_destroy(ctx, expr);
29e38801 3504 expr = next;
96518518
PM		 3505 }
3506 kfree(rule);
3507}
3508
d0e2c7de 3509void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3510{
f6ac8585 3511 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3512 nf_tables_rule_destroy(ctx, rule);
3513}
3514
a654de8f
PNA		 3515int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3516{
3517 struct nft_expr *expr, *last;
3518 const struct nft_data *data;
3519 struct nft_rule *rule;
3520 int err;
3521
26b2f552
TY		 3522 if (ctx->level == NFT_JUMP_STACK_SIZE)
3523 return -EMLINK;
3524
a654de8f
PNA		 3525 list_for_each_entry(rule, &chain->rules, list) {
3526 if (!nft_is_active_next(ctx->net, rule))
3527 continue;
3528
3529 nft_rule_for_each_expr(expr, last, rule) {
3530 if (!expr->ops->validate)
3531 continue;
3532
3533 err = expr->ops->validate(ctx, expr, &data);
3534 if (err < 0)
3535 return err;
3536 }
81ea0106
FW		 3537
3538 cond_resched();
a654de8f
PNA		 3539 }
3540
3541 return 0;
3542}
3543EXPORT_SYMBOL_GPL(nft_chain_validate);
3544
3545static int nft_table_validate(struct net *net, const struct nft_table *table)
3546{
3547 struct nft_chain *chain;
3548 struct nft_ctx ctx = {
3549 .net = net,
3550 .family = table->family,
3551 };
3552 int err;
3553
3554 list_for_each_entry(chain, &table->chains, list) {
3555 if (!nft_is_base_chain(chain))
3556 continue;
3557
3558 ctx.chain = chain;
3559 err = nft_chain_validate(&ctx, chain);
3560 if (err < 0)
3561 return err;
3562 }
3563
3564 return 0;
3565}
3566
d46fc894
PNA		 3567int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
3568 const struct nft_set_iter *iter,
3569 struct nft_set_elem *elem)
3570{
3571 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
3572 struct nft_ctx *pctx = (struct nft_ctx *)ctx;
3573 const struct nft_data *data;
3574 int err;
3575
3576 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
3577 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
3578 return 0;
3579
3580 data = nft_set_ext_data(ext);
3581 switch (data->verdict.code) {
3582 case NFT_JUMP:
3583 case NFT_GOTO:
3584 pctx->level++;
3585 err = nft_chain_validate(ctx, data->verdict.chain);
3586 if (err < 0)
3587 return err;
3588 pctx->level--;
3589 break;
3590 default:
3591 break;
3592 }
3593
3594 return 0;
3595}
3596
3597struct nft_set_elem_catchall {
3598 struct list_head list;
3599 struct rcu_head rcu;
3600 void *elem;
3601};
3602
3603int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
3604{
3605 u8 genmask = nft_genmask_next(ctx->net);
3606 struct nft_set_elem_catchall *catchall;
3607 struct nft_set_elem elem;
3608 struct nft_set_ext *ext;
3609 int ret = 0;
3610
3611 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
3612 ext = nft_set_elem_ext(set, catchall->elem);
3613 if (!nft_set_elem_active(ext, genmask))
3614 continue;
3615
3616 elem.priv = catchall->elem;
3617 ret = nft_setelem_validate(ctx, set, NULL, &elem);
3618 if (ret < 0)
3619 return ret;
3620 }
3621
3622 return ret;
3623}
3624
75dd48e2 3625static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3626 const struct nft_chain *chain,
75dd48e2
PS		 3627 const struct nlattr *nla);
3628
1081d11b
PNA		 3629#define NFT_RULE_MAXEXPRS 128
3630
7dab8ee3
PNA		 3631static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3632 const struct nlattr * const nla[])
96518518 3633{
7dab8ee3 3634 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3635 struct netlink_ext_ack *extack = info->extack;
3636 unsigned int size, i, n, ulen = 0, usize = 0;
3637 u8 genmask = nft_genmask_next(info->net);
3638 struct nft_rule *rule, *old_rule = NULL;
3639 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3640 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3641 struct nft_flow_rule *flow = NULL;
7dab8ee3 3642 struct net *net = info->net;
7dab8ee3 3643 struct nft_userdata *udata;
96518518
PM		 3644 struct nft_table *table;
3645 struct nft_chain *chain;
7dab8ee3
PNA		 3646 struct nft_trans *trans;
3647 u64 handle, pos_handle;
96518518
PM		 3648 struct nft_expr *expr;
3649 struct nft_ctx ctx;
3650 struct nlattr *tmp;
96518518 3651 int err, rem;
96518518 3652
0854db2a 3653 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3654
6001a930
PNA		 3655 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3656 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3657 if (IS_ERR(table)) {
3658 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3659 return PTR_ERR(table);
36dd1bcc 3660 }
96518518 3661
837830a4
PNA		 3662 if (nla[NFTA_RULE_CHAIN]) {
3663 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3664 genmask);
3665 if (IS_ERR(chain)) {
3666 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3667 return PTR_ERR(chain);
3668 }
d0e2c7de
PNA		 3669 if (nft_chain_is_bound(chain))
3670 return -EOPNOTSUPP;
3671
837830a4 3672 } else if (nla[NFTA_RULE_CHAIN_ID]) {
95f466d2 3673 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
837830a4
PNA		 3674 if (IS_ERR(chain)) {
3675 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3676 return PTR_ERR(chain);
3677 }
3678 } else {
3679 return -EINVAL;
36dd1bcc 3680 }
96518518
PM		 3681
3682 if (nla[NFTA_RULE_HANDLE]) {
3683 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3684 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3685 if (IS_ERR(rule)) {
3686 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3687 return PTR_ERR(rule);
36dd1bcc 3688 }
96518518 3689
7dab8ee3 3690 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3691 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3692 return -EEXIST;
36dd1bcc 3693 }
7dab8ee3 3694 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3695 old_rule = rule;
3696 else
3697 return -EOPNOTSUPP;
3698 } else {
7dab8ee3
PNA		 3699 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3700 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3701 return -EINVAL;
3702 handle = nf_tables_alloc_handle(table);
a0a7379e
PNA		 3703
3704 if (chain->use == UINT_MAX)
3705 return -EOVERFLOW;
5e948466 3706
447750f2
FW		 3707 if (nla[NFTA_RULE_POSITION]) {
3708 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3709 old_rule = __nft_rule_lookup(chain, pos_handle);
3710 if (IS_ERR(old_rule)) {
3711 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3712 return PTR_ERR(old_rule);
3713 }
75dd48e2 3714 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3715 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3716 if (IS_ERR(old_rule)) {
3717 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3718 return PTR_ERR(old_rule);
3719 }
36dd1bcc 3720 }
5e948466
EL		 3721 }
3722
7dab8ee3 3723 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3724
96518518
PM		 3725 n = 0;
3726 size = 0;
3727 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3728 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3729 sizeof(struct nft_expr_info),
3730 GFP_KERNEL);
3731 if (!expr_info)
2a43ecf9
FW		 3732 return -ENOMEM;
3733
96518518
PM		 3734 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3735 err = -EINVAL;
3736 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3737 goto err_release_expr;
96518518 3738 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3739 goto err_release_expr;
7dab8ee3 3740 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3741 if (err < 0) {
3742 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3743 goto err_release_expr;
c781471d 3744 }
7dab8ee3 3745 size += expr_info[n].ops->size;
96518518
PM		 3746 n++;
3747 }
3748 }
9889840f
PM		 3749 /* Check for overflow of dlen field */
3750 err = -EFBIG;
3751 if (size >= 1 << 12)
3c5e4462 3752 goto err_release_expr;
96518518 3753
86f1ec32 3754 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3755 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3756 if (ulen > 0)
3757 usize = sizeof(struct nft_userdata) + ulen;
3758 }
0768b3b3 3759
96518518 3760 err = -ENOMEM;
33758c89 3761 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3762 if (rule == NULL)
3c5e4462 3763 goto err_release_expr;
96518518 3764
889f7ee7 3765 nft_activate_next(net, rule);
0628b123 3766
96518518
PM		 3767 rule->handle = handle;
3768 rule->dlen = size;
86f1ec32 3769 rule->udata = ulen ? 1 : 0;
0768b3b3 3770
86f1ec32
PM		 3771 if (ulen) {
3772 udata = nft_userdata(rule);
3773 udata->len = ulen - 1;
3774 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3775 }
96518518 3776
96518518
PM		 3777 expr = nft_expr_first(rule);
3778 for (i = 0; i < n; i++) {
7dab8ee3 3779 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 3780 if (err < 0) {
7dab8ee3 3781 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 3782 goto err_release_rule;
83d9dcba 3783 }
a654de8f 3784
7dab8ee3 3785 if (expr_info[i].ops->validate)
00c320f9 3786 nft_validate_state_update(table, NFT_VALIDATE_NEED);
a654de8f 3787
7dab8ee3 3788 expr_info[i].ops = NULL;
96518518
PM		 3789 expr = nft_expr_next(expr);
3790 }
3791
3c5e4462
PNA		 3792 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3793 flow = nft_flow_rule_create(net, rule);
3794 if (IS_ERR(flow)) {
3795 err = PTR_ERR(flow);
3796 goto err_release_rule;
3797 }
3798 }
3799
7dab8ee3 3800 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
2c964c55
PNA		 3801 err = nft_delrule(&ctx, old_rule);
3802 if (err < 0)
3803 goto err_destroy_flow_rule;
3804
ca089878 3805 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 3806 if (trans == NULL) {
3807 err = -ENOMEM;
3c5e4462 3808 goto err_destroy_flow_rule;
569ccae6 3809 }
569ccae6
FW		 3810 list_add_tail_rcu(&rule->list, &old_rule->list);
3811 } else {
c9626a2c
PNA		 3812 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3813 if (!trans) {
569ccae6 3814 err = -ENOMEM;
3c5e4462 3815 goto err_destroy_flow_rule;
569ccae6
FW		 3816 }
3817
7dab8ee3 3818 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 3819 if (old_rule)
3820 list_add_rcu(&rule->list, &old_rule->list);
3821 else
3822 list_add_tail_rcu(&rule->list, &chain->rules);
3823 } else {
3824 if (old_rule)
3825 list_add_tail_rcu(&rule->list, &old_rule->list);
3826 else
3827 list_add_rcu(&rule->list, &chain->rules);
3828 }
0628b123 3829 }
7dab8ee3 3830 kvfree(expr_info);
4fefee57 3831 chain->use++;
96518518 3832
3c5e4462
PNA		 3833 if (flow)
3834 nft_trans_flow_rule(trans) = flow;
3835
00c320f9 3836 if (table->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 3837 return nft_table_validate(net, table);
3838
3839 return 0;
3c5e4462
PNA		 3840
3841err_destroy_flow_rule:
4ca041f9
CIK		 3842 if (flow)
3843 nft_flow_rule_destroy(flow);
3c5e4462 3844err_release_rule:
bb7b40ae 3845 nf_tables_rule_release(&ctx, rule);
3c5e4462 3846err_release_expr:
96518518 3847 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 3848 if (expr_info[i].ops) {
3849 module_put(expr_info[i].ops->type->owner);
3850 if (expr_info[i].ops->type->release_ops)
3851 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 3852 }
96518518 3853 }
7dab8ee3
PNA		 3854 kvfree(expr_info);
3855
96518518
PM		 3856 return err;
3857}
3858
1a94e38d 3859static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3860 const struct nft_chain *chain,
1a94e38d
PNA		 3861 const struct nlattr *nla)
3862{
d59d2f82 3863 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 3864 u32 id = ntohl(nla_get_be32(nla));
3865 struct nft_trans *trans;
3866
0854db2a 3867 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d
PNA		 3868 struct nft_rule *rule = nft_trans_rule(trans);
3869
3870 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 3871 trans->ctx.chain == chain &&
1a94e38d
PNA		 3872 id == nft_trans_rule_id(trans))
3873 return rule;
3874 }
3875 return ERR_PTR(-ENOENT);
3876}
3877
7dab8ee3
PNA		 3878static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3879 const struct nlattr * const nla[])
96518518 3880{
7dab8ee3 3881 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 3882 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 3883 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 3884 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 3885 struct net *net = info->net;
3886 struct nft_table *table;
cf9dc09d 3887 struct nft_rule *rule;
0628b123 3888 struct nft_ctx ctx;
ef4b65e5 3889 int err = 0;
96518518 3890
6001a930
PNA		 3891 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3892 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3893 if (IS_ERR(table)) {
3894 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3895 return PTR_ERR(table);
36dd1bcc 3896 }
96518518 3897
cf9dc09d 3898 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 3899 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3900 genmask);
36dd1bcc 3901 if (IS_ERR(chain)) {
1fb7696a 3902 if (PTR_ERR(chain) == -ENOENT &&
f80a612d
FFM		 3903 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
3904 return 0;
3905
36dd1bcc 3906 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 3907 return PTR_ERR(chain);
36dd1bcc 3908 }
d0e2c7de
PNA		 3909 if (nft_chain_is_bound(chain))
3910 return -EOPNOTSUPP;
cf9dc09d 3911 }
96518518 3912
7dab8ee3 3913 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 3914
cf9dc09d
PNA		 3915 if (chain) {
3916 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 3917 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc 3918 if (IS_ERR(rule)) {
f80a612d
FFM		 3919 if (PTR_ERR(rule) == -ENOENT &&
3920 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
3921 return 0;
3922
36dd1bcc 3923 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 3924 return PTR_ERR(rule);
36dd1bcc 3925 }
96518518 3926
1a94e38d
PNA		 3927 err = nft_delrule(&ctx, rule);
3928 } else if (nla[NFTA_RULE_ID]) {
36d5b291 3929 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 3930 if (IS_ERR(rule)) {
3931 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 3932 return PTR_ERR(rule);
36dd1bcc 3933 }
1a94e38d 3934
5e266fe7 3935 err = nft_delrule(&ctx, rule);
cf9dc09d 3936 } else {
ce24b721 3937 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 3938 }
3939 } else {
3940 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 3941 if (!nft_is_active_next(net, chain))
3942 continue;
3943
cf9dc09d 3944 ctx.chain = chain;
ce24b721 3945 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 3946 if (err < 0)
3947 break;
3948 }
3949 }
3950
3951 return err;
3952}
3953
20a69341
PM		 3954/*
3955 * Sets
3956 */
e32a4dc6
FW		 3957static const struct nft_set_type *nft_set_types[] = {
3958 &nft_set_hash_fast_type,
3959 &nft_set_hash_type,
3960 &nft_set_rhash_type,
3961 &nft_set_bitmap_type,
3962 &nft_set_rbtree_type,
e6abef61 3963#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 3964 &nft_set_pipapo_avx2_type,
3965#endif
e32a4dc6
FW		 3966 &nft_set_pipapo_type,
3967};
20a69341 3968
2b664957 3969#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 3970 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3971 NFT_SET_EVAL)
2b664957 3972
71cc0873 3973static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 3974{
71cc0873 3975 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 3976}
3977
c50b960c
PM		 3978/*
3979 * Select a set implementation based on the data characteristics and the
3980 * given policy. The total memory use might not be known if no size is
3981 * given, in that case the amount of memory per element is used.
3982 */
3983static const struct nft_set_ops *
2b664957
PNA		 3984nft_select_set_ops(const struct nft_ctx *ctx,
3985 const struct nlattr * const nla[],
bed4a63e 3986 const struct nft_set_desc *desc)
20a69341 3987{
d59d2f82 3988 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 3989 const struct nft_set_ops *ops, *bops;
3990 struct nft_set_estimate est, best;
2b664957
PNA		 3991 const struct nft_set_type *type;
3992 u32 flags = 0;
e32a4dc6 3993 int i;
20a69341 3994
0854db2a 3995 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3996 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 3997
2b664957
PNA		 3998 if (nla[NFTA_SET_FLAGS] != NULL)
3999 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 4000
55af753c
PNA		 4001 bops = NULL;
4002 best.size = ~0;
4003 best.lookup = ~0;
0b5a7874 4004 best.space = ~0;
c50b960c 4005
e32a4dc6
FW		 4006 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
4007 type = nft_set_types[i];
71cc0873 4008 ops = &type->ops;
2b664957 4009
71cc0873 4010 if (!nft_set_ops_candidate(type, flags))
20a69341 4011 continue;
2b664957 4012 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 4013 continue;
4014
bed4a63e 4015 switch (desc->policy) {
c50b960c 4016 case NFT_SET_POL_PERFORMANCE:
55af753c 4017 if (est.lookup < best.lookup)
c50b960c 4018 break;
644e334e
PNA		 4019 if (est.lookup == best.lookup &&
4020 est.space < best.space)
4021 break;
c50b960c
PM		 4022 continue;
4023 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 4024 if (!desc->size) {
4025 if (est.space < best.space)
4026 break;
4027 if (est.space == best.space &&
4028 est.lookup < best.lookup)
4029 break;
4f2921ca 4030 } else if (est.size < best.size || !bops) {
c50b960c 4031 break;
0b5a7874 4032 }
c50b960c
PM		 4033 continue;
4034 default:
4035 break;
4036 }
4037
c50b960c
PM		 4038 bops = ops;
4039 best = est;
20a69341
PM		 4040 }
4041
c50b960c
PM		 4042 if (bops != NULL)
4043 return bops;
4044
20a69341
PM		 4045 return ERR_PTR(-EOPNOTSUPP);
4046}
4047
4048static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 4049 [NFTA_SET_TABLE] = { .type = NLA_STRING,
4050 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 4051 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 4052 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 4053 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
4054 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
4055 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
4056 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
4057 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 4058 [NFTA_SET_POLICY] = { .type = NLA_U32 },
4059 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 4060 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 4061 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
4062 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 4063 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
4064 .len = NFT_USERDATA_MAXLEN },
8aeff920 4065 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 4066 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 4067 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
48b0ae04 4068 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
c50b960c
PM		 4069};
4070
4071static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
4072 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
f3a2181e 4073 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
20a69341
PM		 4074};
4075
cac20fcd
PNA		 4076static struct nft_set *nft_set_lookup(const struct nft_table *table,
4077 const struct nlattr *nla, u8 genmask)
20a69341
PM		 4078{
4079 struct nft_set *set;
4080
4081 if (nla == NULL)
4082 return ERR_PTR(-EINVAL);
4083
d9adf22a 4084 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 4085 if (!nla_strcmp(nla, set->name) &&
4086 nft_active_genmask(set, genmask))
20a69341
PM		 4087 return set;
4088 }
4089 return ERR_PTR(-ENOENT);
4090}
4091
cac20fcd
PNA		 4092static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
4093 const struct nlattr *nla,
4094 u8 genmask)
3ecbfd65
HS		 4095{
4096 struct nft_set *set;
4097
3ecbfd65
HS		 4098 list_for_each_entry(set, &table->sets, list) {
4099 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
4100 nft_active_genmask(set, genmask))
4101 return set;
4102 }
4103 return ERR_PTR(-ENOENT);
4104}
4105
cac20fcd 4106static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 4107 const struct nft_table *table,
cac20fcd 4108 const struct nlattr *nla, u8 genmask)
958bee14 4109{
d59d2f82 4110 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 4111 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 4112 struct nft_trans *trans;
958bee14 4113
0854db2a 4114 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 4115 if (trans->msg_type == NFT_MSG_NEWSET) {
4116 struct nft_set *set = nft_trans_set(trans);
37a9cc52 4117
9c7f96fd 4118 if (id == nft_trans_set_id(trans) &&
470ee20e 4119 set->table == table &&
9c7f96fd
AK		 4120 nft_active_genmask(set, genmask))
4121 return set;
4122 }
958bee14
PNA		 4123 }
4124 return ERR_PTR(-ENOENT);
4125}
c7a72e3f 4126
10659cba
PNA		 4127struct nft_set *nft_set_lookup_global(const struct net *net,
4128 const struct nft_table *table,
4129 const struct nlattr *nla_set_name,
4130 const struct nlattr *nla_set_id,
4131 u8 genmask)
c7a72e3f
PNA		 4132{
4133 struct nft_set *set;
4134
cac20fcd 4135 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 4136 if (IS_ERR(set)) {
4137 if (!nla_set_id)
4138 return set;
4139
470ee20e 4140 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 4141 }
4142 return set;
4143}
10659cba 4144EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 4145
20a69341
PM		 4146static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
4147 const char *name)
4148{
4149 const struct nft_set *i;
4150 const char *p;
4151 unsigned long *inuse;
60eb1894 4152 unsigned int n = 0, min = 0;
20a69341 4153
38745490 4154 p = strchr(name, '%');
20a69341
PM		 4155 if (p != NULL) {
4156 if (p[1] != 'd' || strchr(p + 2, '%'))
4157 return -EINVAL;
4158
4159 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
4160 if (inuse == NULL)
4161 return -ENOMEM;
60eb1894 4162cont:
20a69341 4163 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 4164 int tmp;
4165
271c5ca8 4166 if (!nft_is_active_next(ctx->net, i))
37a9cc52 4167 continue;
14662917 4168 if (!sscanf(i->name, name, &tmp))
20a69341 4169 continue;
60eb1894 4170 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 4171 continue;
14662917 4172
60eb1894 4173 set_bit(tmp - min, inuse);
20a69341
PM		 4174 }
4175
53b70287 4176 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 4177 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
4178 min += BITS_PER_BYTE * PAGE_SIZE;
4179 memset(inuse, 0, PAGE_SIZE);
4180 goto cont;
4181 }
20a69341
PM		 4182 free_page((unsigned long)inuse);
4183 }
4184
33758c89 4185 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 4186 if (!set->name)
4187 return -ENOMEM;
4188
20a69341 4189 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 4190 if (!nft_is_active_next(ctx->net, i))
4191 continue;
e63aaaa6
AY		 4192 if (!strcmp(set->name, i->name)) {
4193 kfree(set->name);
7fb6f78d 4194 set->name = NULL;
20a69341 4195 return -ENFILE;
e63aaaa6 4196 }
20a69341
PM		 4197 }
4198 return 0;
4199}
4200
917d80d3 4201int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 4202{
4203 u64 ms = be64_to_cpu(nla_get_be64(nla));
4204 u64 max = (u64)(~((u64)0));
4205
4206 max = div_u64(max, NSEC_PER_MSEC);
4207 if (ms >= max)
4208 return -ERANGE;
4209
4210 ms *= NSEC_PER_MSEC;
4211 *result = nsecs_to_jiffies64(ms);
4212 return 0;
4213}
4214
917d80d3 4215__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 4216{
3b15d09f 4217 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 4218}
4219
f3a2181e
SB		 4220static int nf_tables_fill_set_concat(struct sk_buff *skb,
4221 const struct nft_set *set)
4222{
4223 struct nlattr *concat, *field;
4224 int i;
4225
4226 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4227 if (!concat)
4228 return -ENOMEM;
4229
4230 for (i = 0; i < set->field_count; i++) {
4231 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4232 if (!field)
4233 return -ENOMEM;
4234
4235 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4236 htonl(set->field_len[i])))
4237 return -ENOMEM;
4238
4239 nla_nest_end(skb, field);
4240 }
4241
4242 nla_nest_end(skb, concat);
4243
4244 return 0;
4245}
4246
20a69341
PM		 4247static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4248 const struct nft_set *set, u16 event, u16 flags)
4249{
123b9961
PNA		 4250 u64 timeout = READ_ONCE(set->timeout);
4251 u32 gc_int = READ_ONCE(set->gc_int);
128ad332 4252 u32 portid = ctx->portid;
123b9961 4253 struct nlmsghdr *nlh;
65038428 4254 struct nlattr *nest;
128ad332 4255 u32 seq = ctx->seq;
48b0ae04 4256 int i;
20a69341 4257
dedb67c4 4258 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4259 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4260 NFNETLINK_V0, nft_base_seq(ctx->net));
4261 if (!nlh)
20a69341
PM		 4262 goto nla_put_failure;
4263
20a69341
PM		 4264 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4265 goto nla_put_failure;
4266 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4267 goto nla_put_failure;
3ecbfd65
HS		 4268 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4269 NFTA_SET_PAD))
4270 goto nla_put_failure;
28339b21
PNA		 4271
4272 if (event == NFT_MSG_DELSET) {
4273 nlmsg_end(skb, nlh);
4274 return 0;
4275 }
4276
20a69341
PM		 4277 if (set->flags != 0)
4278 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4279 goto nla_put_failure;
4280
4281 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4282 goto nla_put_failure;
4283 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4284 goto nla_put_failure;
4285 if (set->flags & NFT_SET_MAP) {
4286 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4287 goto nla_put_failure;
4288 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4289 goto nla_put_failure;
4290 }
8aeff920
PNA		 4291 if (set->flags & NFT_SET_OBJECT &&
4292 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4293 goto nla_put_failure;
20a69341 4294
123b9961 4295 if (timeout &&
d3e2a111 4296 nla_put_be64(skb, NFTA_SET_TIMEOUT,
123b9961 4297 nf_jiffies64_to_msecs(timeout),
b46f6ded 4298 NFTA_SET_PAD))
761da293 4299 goto nla_put_failure;
123b9961
PNA		 4300 if (gc_int &&
4301 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(gc_int)))
761da293
PM		 4302 goto nla_put_failure;
4303
9363dc4b
AB		 4304 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4305 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4306 goto nla_put_failure;
4307 }
4308
6f03bf43
PNA		 4309 if (set->udata &&
4310 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4311 goto nla_put_failure;
4312
65038428
PNA		 4313 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4314 if (!nest)
c50b960c
PM		 4315 goto nla_put_failure;
4316 if (set->size &&
4317 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4318 goto nla_put_failure;
f3a2181e
SB		 4319
4320 if (set->field_count > 1 &&
4321 nf_tables_fill_set_concat(skb, set))
4322 goto nla_put_failure;
4323
65038428
PNA		 4324 nla_nest_end(skb, nest);
4325
8cfd9b0f 4326 if (set->num_exprs == 1) {
65038428 4327 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8daa8fde 4328 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
65038428
PNA		 4329 goto nla_put_failure;
4330
4331 nla_nest_end(skb, nest);
48b0ae04
PNA		 4332 } else if (set->num_exprs > 1) {
4333 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4334 if (nest == NULL)
65038428
PNA		 4335 goto nla_put_failure;
4336
48b0ae04
PNA		 4337 for (i = 0; i < set->num_exprs; i++) {
4338 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
8daa8fde 4339 set->exprs[i], false) < 0)
48b0ae04
PNA		 4340 goto nla_put_failure;
4341 }
65038428
PNA		 4342 nla_nest_end(skb, nest);
4343 }
c50b960c 4344
053c095a
JB		 4345 nlmsg_end(skb, nlh);
4346 return 0;
20a69341
PM		 4347
4348nla_put_failure:
4349 nlmsg_trim(skb, nlh);
4350 return -1;
4351}
4352
25e94a99
PNA		 4353static void nf_tables_set_notify(const struct nft_ctx *ctx,
4354 const struct nft_set *set, int event,
4355 gfp_t gfp_flags)
20a69341 4356{
d59d2f82 4357 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4358 u32 portid = ctx->portid;
6fb721cf
PNA		 4359 struct sk_buff *skb;
4360 u16 flags = 0;
20a69341
PM		 4361 int err;
4362
128ad332
PNA		 4363 if (!ctx->report &&
4364 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4365 return;
20a69341 4366
31f8441c 4367 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4368 if (skb == NULL)
4369 goto err;
4370
6fb721cf
PNA		 4371 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4372 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4373
4374 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4375 if (err < 0) {
4376 kfree_skb(skb);
4377 goto err;
4378 }
4379
0854db2a 4380 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4381 return;
20a69341 4382err:
25e94a99 4383 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4384}
4385
5b96af77 4386static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4387{
4388 const struct nft_set *set;
4389 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4390 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4391 struct net *net = sock_net(skb->sk);
5b96af77 4392 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4393 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4394
4395 if (cb->args[1])
4396 return skb->len;
4397
e688a7f8 4398 rcu_read_lock();
d59d2f82 4399 nft_net = nft_pernet(net);
34002783 4400 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4401
0854db2a 4402 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4403 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4404 ctx->family != table->family)
36596dad
PNA		 4405 continue;
4406
4407 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4408 continue;
4409
36596dad
PNA		 4410 if (cur_table) {
4411 if (cur_table != table)
c9c8e485
PNA		 4412 continue;
4413
36596dad 4414 cur_table = NULL;
c9c8e485 4415 }
36596dad
PNA		 4416 idx = 0;
4417 list_for_each_entry_rcu(set, &table->sets, list) {
4418 if (idx < s_idx)
4419 goto cont;
4420 if (!nft_is_active(net, set))
4421 goto cont;
5b96af77 4422
36596dad
PNA		 4423 ctx_set = *ctx;
4424 ctx_set.table = table;
98319cb9 4425 ctx_set.family = table->family;
c9c8e485 4426
36596dad
PNA		 4427 if (nf_tables_fill_set(skb, &ctx_set, set,
4428 NFT_MSG_NEWSET,
4429 NLM_F_MULTI) < 0) {
4430 cb->args[0] = idx;
4431 cb->args[2] = (unsigned long) table;
4432 goto done;
c9c8e485 4433 }
36596dad 4434 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4435cont:
36596dad 4436 idx++;
c9c8e485 4437 }
36596dad
PNA		 4438 if (s_idx)
4439 s_idx = 0;
c9c8e485
PNA		 4440 }
4441 cb->args[1] = 1;
4442done:
e688a7f8 4443 rcu_read_unlock();
c9c8e485
PNA		 4444 return skb->len;
4445}
4446
90fd131a
FW		 4447static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4448{
4449 struct nft_ctx *ctx_dump = NULL;
4450
4451 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4452 if (ctx_dump == NULL)
4453 return -ENOMEM;
4454
4455 cb->data = ctx_dump;
4456 return 0;
4457}
4458
5b96af77 4459static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4460{
5b96af77
PNA		 4461 kfree(cb->data);
4462 return 0;
20a69341
PM		 4463}
4464
d9adf22a 4465/* called with rcu_read_lock held */
797d4980
PNA		 4466static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4467 const struct nlattr * const nla[])
20a69341 4468{
797d4980
PNA		 4469 struct netlink_ext_ack *extack = info->extack;
4470 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4471 u8 family = info->nfmsg->nfgen_family;
4472 struct nft_table *table = NULL;
797d4980 4473 struct net *net = info->net;
20a69341 4474 const struct nft_set *set;
20a69341 4475 struct sk_buff *skb2;
797d4980 4476 struct nft_ctx ctx;
20a69341
PM		 4477 int err;
4478
67086651
PNA		 4479 if (nla[NFTA_SET_TABLE]) {
4480 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4481 genmask, 0);
4482 if (IS_ERR(table)) {
4483 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4484 return PTR_ERR(table);
4485 }
4486 }
4487
4488 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4489
797d4980 4490 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4491 struct netlink_dump_control c = {
90fd131a 4492 .start = nf_tables_dump_sets_start,
20a69341 4493 .dump = nf_tables_dump_sets,
5b96af77 4494 .done = nf_tables_dump_sets_done,
90fd131a 4495 .data = &ctx,
d9adf22a 4496 .module = THIS_MODULE,
20a69341 4497 };
5b96af77 4498
797d4980 4499 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4500 }
4501
c9c8e485 4502 /* Only accept unspec with dump */
ef4b65e5 4503 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4504 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4505 if (!nla[NFTA_SET_TABLE])
4506 return -EINVAL;
c9c8e485 4507
67086651 4508 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341
PM		 4509 if (IS_ERR(set))
4510 return PTR_ERR(set);
4511
d9adf22a 4512 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4513 if (skb2 == NULL)
4514 return -ENOMEM;
4515
4516 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4517 if (err < 0)
ee921183 4518 goto err_fill_set_info;
20a69341 4519
ee921183 4520 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4521
ee921183 4522err_fill_set_info:
20a69341
PM		 4523 kfree_skb(skb2);
4524 return err;
4525}
4526
f3a2181e
SB		 4527static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4528 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4529};
4530
4531static int nft_set_desc_concat_parse(const struct nlattr *attr,
4532 struct nft_set_desc *desc)
4533{
4534 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4535 u32 len;
4536 int err;
4537
fecf31ee
PNA		 4538 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4539 return -E2BIG;
4540
f3a2181e
SB		 4541 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4542 nft_concat_policy, NULL);
4543 if (err < 0)
4544 return err;
4545
4546 if (!tb[NFTA_SET_FIELD_LEN])
4547 return -EINVAL;
4548
4549 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4550 if (!len || len > U8_MAX)
4551 return -EINVAL;
f3a2181e
SB		 4552
4553 desc->field_len[desc->field_count++] = len;
4554
4555 return 0;
4556}
4557
4558static int nft_set_desc_concat(struct nft_set_desc *desc,
4559 const struct nlattr *nla)
4560{
4561 struct nlattr *attr;
fecf31ee
PNA		 4562 u32 num_regs = 0;
4563 int rem, err, i;
f3a2181e
SB		 4564
4565 nla_for_each_nested(attr, nla, rem) {
4566 if (nla_type(attr) != NFTA_LIST_ELEM)
4567 return -EINVAL;
4568
4569 err = nft_set_desc_concat_parse(attr, desc);
4570 if (err < 0)
4571 return err;
4572 }
4573
fecf31ee
PNA		 4574 for (i = 0; i < desc->field_count; i++)
4575 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4576
4577 if (num_regs > NFT_REG32_COUNT)
4578 return -E2BIG;
4579
f3a2181e
SB		 4580 return 0;
4581}
4582
f7e840ee 4583static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4584 const struct nlattr *nla)
4585{
4586 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4587 int err;
4588
8cb08174
JB		 4589 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4590 nft_set_desc_policy, NULL);
c50b960c
PM		 4591 if (err < 0)
4592 return err;
4593
4594 if (da[NFTA_SET_DESC_SIZE] != NULL)
4595 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4596 if (da[NFTA_SET_DESC_CONCAT])
4597 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4598
f3a2181e 4599 return err;
c50b960c
PM		 4600}
4601
a8fe4154
PNA		 4602static int nft_set_expr_alloc(struct nft_ctx *ctx, struct nft_set *set,
4603 const struct nlattr * const *nla,
4604 struct nft_expr **exprs, int *num_exprs,
4605 u32 flags)
4606{
4607 struct nft_expr *expr;
4608 int err, i;
4609
4610 if (nla[NFTA_SET_EXPR]) {
4611 expr = nft_set_elem_expr_alloc(ctx, set, nla[NFTA_SET_EXPR]);
4612 if (IS_ERR(expr)) {
4613 err = PTR_ERR(expr);
4614 goto err_set_expr_alloc;
4615 }
4616 exprs[0] = expr;
4617 (*num_exprs)++;
4618 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4619 struct nlattr *tmp;
4620 int left;
4621
4622 if (!(flags & NFT_SET_EXPR)) {
4623 err = -EINVAL;
4624 goto err_set_expr_alloc;
4625 }
4626 i = 0;
4627 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4628 if (i == NFT_SET_EXPR_MAX) {
4629 err = -E2BIG;
4630 goto err_set_expr_alloc;
4631 }
4632 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4633 err = -EINVAL;
4634 goto err_set_expr_alloc;
4635 }
4636 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
4637 if (IS_ERR(expr)) {
4638 err = PTR_ERR(expr);
4639 goto err_set_expr_alloc;
4640 }
4641 exprs[i++] = expr;
4642 (*num_exprs)++;
4643 }
4644 }
4645
4646 return 0;
4647
4648err_set_expr_alloc:
4649 for (i = 0; i < *num_exprs; i++)
4650 nft_expr_destroy(ctx, exprs[i]);
4651
4652 return err;
4653}
4654
f6594c37
PNA		 4655static bool nft_set_is_same(const struct nft_set *set,
4656 const struct nft_set_desc *desc,
4657 struct nft_expr *exprs[], u32 num_exprs, u32 flags)
4658{
4659 int i;
4660
4661 if (set->ktype != desc->ktype ||
4662 set->dtype != desc->dtype ||
4663 set->flags != flags ||
4664 set->klen != desc->klen ||
4665 set->dlen != desc->dlen ||
4666 set->field_count != desc->field_count ||
4667 set->num_exprs != num_exprs)
4668 return false;
4669
4670 for (i = 0; i < desc->field_count; i++) {
4671 if (set->field_len[i] != desc->field_len[i])
4672 return false;
4673 }
4674
4675 for (i = 0; i < num_exprs; i++) {
4676 if (set->exprs[i]->ops != exprs[i]->ops)
4677 return false;
4678 }
4679
4680 return true;
4681}
4682
7dab8ee3
PNA		 4683static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4684 const struct nlattr * const nla[])
20a69341 4685{
7dab8ee3
PNA		 4686 struct netlink_ext_ack *extack = info->extack;
4687 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4688 u8 family = info->nfmsg->nfgen_family;
20a69341 4689 const struct nft_set_ops *ops;
7dab8ee3
PNA		 4690 struct net *net = info->net;
4691 struct nft_set_desc desc;
20a69341 4692 struct nft_table *table;
7dab8ee3 4693 unsigned char *udata;
20a69341
PM		 4694 struct nft_set *set;
4695 struct nft_ctx ctx;
6c8774a9 4696 size_t alloc_size;
a8fe4154 4697 int num_exprs = 0;
7dab8ee3
PNA		 4698 char *name;
4699 int err, i;
e6d8ecac 4700 u16 udlen;
bed4a63e 4701 u32 flags;
7dab8ee3 4702 u64 size;
20a69341
PM		 4703
4704 if (nla[NFTA_SET_TABLE] == NULL ||
4705 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4706 nla[NFTA_SET_KEY_LEN] == NULL ||
4707 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4708 return -EINVAL;
4709
c50b960c
PM		 4710 memset(&desc, 0, sizeof(desc));
4711
bed4a63e 4712 desc.ktype = NFT_DATA_VALUE;
20a69341 4713 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
bed4a63e
PNA		 4714 desc.ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4715 if ((desc.ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
20a69341
PM		 4716 return -EINVAL;
4717 }
4718
c50b960c 4719 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4720 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4721 return -EINVAL;
4722
4723 flags = 0;
4724 if (nla[NFTA_SET_FLAGS] != NULL) {
4725 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4726 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4727 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4728 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4729 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4730 return -EOPNOTSUPP;
8aeff920 4731 /* Only one of these operations is supported */
acab7131
FW		 4732 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4733 (NFT_SET_MAP | NFT_SET_OBJECT))
4734 return -EOPNOTSUPP;
4735 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4736 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4737 return -EOPNOTSUPP;
20a69341
PM		 4738 }
4739
bed4a63e 4740 desc.dtype = 0;
20a69341
PM		 4741 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4742 if (!(flags & NFT_SET_MAP))
4743 return -EINVAL;
4744
bed4a63e
PNA		 4745 desc.dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4746 if ((desc.dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4747 desc.dtype != NFT_DATA_VERDICT)
20a69341
PM		 4748 return -EINVAL;
4749
bed4a63e 4750 if (desc.dtype != NFT_DATA_VERDICT) {
20a69341
PM		 4751 if (nla[NFTA_SET_DATA_LEN] == NULL)
4752 return -EINVAL;
c50b960c 4753 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4754 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4755 return -EINVAL;
4756 } else
7d740264 4757 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 4758 } else if (flags & NFT_SET_MAP)
4759 return -EINVAL;
4760
8aeff920
PNA		 4761 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4762 if (!(flags & NFT_SET_OBJECT))
4763 return -EINVAL;
4764
bed4a63e
PNA		 4765 desc.objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4766 if (desc.objtype == NFT_OBJECT_UNSPEC ||
4767 desc.objtype > NFT_OBJECT_MAX)
d9583cdf 4768 return -EOPNOTSUPP;
8aeff920
PNA		 4769 } else if (flags & NFT_SET_OBJECT)
4770 return -EINVAL;
4771 else
bed4a63e 4772 desc.objtype = NFT_OBJECT_UNSPEC;
8aeff920 4773
bed4a63e 4774 desc.timeout = 0;
761da293
PM		 4775 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4776 if (!(flags & NFT_SET_TIMEOUT))
4777 return -EINVAL;
8e1102d5 4778
bed4a63e 4779 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &desc.timeout);
8e1102d5
FW		 4780 if (err)
4781 return err;
761da293 4782 }
bed4a63e 4783 desc.gc_int = 0;
761da293
PM		 4784 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4785 if (!(flags & NFT_SET_TIMEOUT))
4786 return -EINVAL;
bed4a63e 4787 desc.gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
761da293
PM		 4788 }
4789
bed4a63e 4790 desc.policy = NFT_SET_POL_PERFORMANCE;
c50b960c 4791 if (nla[NFTA_SET_POLICY] != NULL)
bed4a63e 4792 desc.policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
c50b960c
PM		 4793
4794 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 4795 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 4796 if (err < 0)
4797 return err;
1b6345d4
PNA		 4798
4799 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4800 return -EINVAL;
4801 } else if (flags & NFT_SET_CONCAT) {
4802 return -EINVAL;
c50b960c
PM		 4803 }
4804
48b0ae04 4805 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 4806 desc.expr = true;
4807
6001a930
PNA		 4808 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4809 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4810 if (IS_ERR(table)) {
4811 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 4812 return PTR_ERR(table);
36dd1bcc 4813 }
20a69341 4814
7dab8ee3 4815 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4816
cac20fcd 4817 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 4818 if (IS_ERR(set)) {
36dd1bcc
PNA		 4819 if (PTR_ERR(set) != -ENOENT) {
4820 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4821 return PTR_ERR(set);
36dd1bcc 4822 }
1a28ad74 4823 } else {
a8fe4154
PNA		 4824 struct nft_expr *exprs[NFT_SET_EXPR_MAX] = {};
4825
7dab8ee3 4826 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 4827 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4828 return -EEXIST;
36dd1bcc 4829 }
7dab8ee3 4830 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 4831 return -EOPNOTSUPP;
36dd1bcc 4832
a8fe4154
PNA		 4833 err = nft_set_expr_alloc(&ctx, set, nla, exprs, &num_exprs, flags);
4834 if (err < 0)
4835 return err;
4836
f6594c37
PNA		 4837 err = 0;
4838 if (!nft_set_is_same(set, &desc, exprs, num_exprs, flags)) {
4839 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4840 err = -EEXIST;
4841 }
4842
a8fe4154
PNA		 4843 for (i = 0; i < num_exprs; i++)
4844 nft_expr_destroy(&ctx, exprs[i]);
4845
123b9961
PNA		 4846 if (err < 0)
4847 return err;
4848
4849 return __nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set, &desc);
20a69341
PM		 4850 }
4851
7dab8ee3 4852 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 4853 return -ENOENT;
4854
bed4a63e 4855 ops = nft_select_set_ops(&ctx, nla, &desc);
20a69341
PM		 4856 if (IS_ERR(ops))
4857 return PTR_ERR(ops);
4858
e6d8ecac
CFG		 4859 udlen = 0;
4860 if (nla[NFTA_SET_USERDATA])
4861 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4862
20a69341
PM		 4863 size = 0;
4864 if (ops->privsize != NULL)
347b408d 4865 size = ops->privsize(nla, &desc);
6c8774a9 4866 alloc_size = sizeof(*set) + size + udlen;
45928afe 4867 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 4868 return -ENOMEM;
33758c89 4869 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
24d19826
FW		 4870 if (!set)
4871 return -ENOMEM;
20a69341 4872
33758c89 4873 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 4874 if (!name) {
4875 err = -ENOMEM;
65038428 4876 goto err_set_name;
38745490
PS		 4877 }
4878
20a69341 4879 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 4880 kfree(name);
20a69341 4881 if (err < 0)
ad9f151e
PNA		 4882 goto err_set_name;
4883
4884 udata = NULL;
4885 if (udlen) {
4886 udata = set->data + size;
4887 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
4888 }
4889
4890 INIT_LIST_HEAD(&set->bindings);
4891 INIT_LIST_HEAD(&set->catchall_list);
4892 set->table = table;
4893 write_pnet(&set->net, net);
4894 set->ops = ops;
bed4a63e 4895 set->ktype = desc.ktype;
ad9f151e 4896 set->klen = desc.klen;
bed4a63e
PNA		 4897 set->dtype = desc.dtype;
4898 set->objtype = desc.objtype;
ad9f151e
PNA		 4899 set->dlen = desc.dlen;
4900 set->flags = flags;
4901 set->size = desc.size;
bed4a63e 4902 set->policy = desc.policy;
ad9f151e
PNA		 4903 set->udlen = udlen;
4904 set->udata = udata;
bed4a63e
PNA		 4905 set->timeout = desc.timeout;
4906 set->gc_int = desc.gc_int;
ad9f151e
PNA		 4907
4908 set->field_count = desc.field_count;
4909 for (i = 0; i < desc.field_count; i++)
4910 set->field_len[i] = desc.field_len[i];
4911
4912 err = ops->init(set, &desc, nla);
4913 if (err < 0)
4914 goto err_set_init;
65038428 4915
a8fe4154
PNA		 4916 err = nft_set_expr_alloc(&ctx, set, nla, set->exprs, &num_exprs, flags);
4917 if (err < 0)
4918 goto err_set_destroy;
20a69341 4919
a8fe4154 4920 set->num_exprs = num_exprs;
3ecbfd65 4921 set->handle = nf_tables_alloc_handle(table);
20a69341 4922
958bee14 4923 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 4924 if (err < 0)
ad9f151e 4925 goto err_set_expr_alloc;
20a69341 4926
e688a7f8 4927 list_add_tail_rcu(&set->list, &table->sets);
4fefee57 4928 table->use++;
20a69341
PM		 4929 return 0;
4930
ad9f151e 4931err_set_expr_alloc:
8cfd9b0f
PNA		 4932 for (i = 0; i < set->num_exprs; i++)
4933 nft_expr_destroy(&ctx, set->exprs[i]);
a8fe4154 4934err_set_destroy:
ad9f151e
PNA		 4935 ops->destroy(set);
4936err_set_init:
2f6adf48 4937 kfree(set->name);
65038428 4938err_set_name:
1ff75a3e 4939 kvfree(set);
20a69341
PM		 4940 return err;
4941}
4942
aaa31047
PNA		 4943static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
4944 struct nft_set *set)
4945{
0f7d9b31 4946 struct nft_set_elem_catchall *next, *catchall;
aaa31047 4947
0f7d9b31 4948 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047
PNA		 4949 list_del_rcu(&catchall->list);
4950 nft_set_elem_destroy(set, catchall->elem, true);
ae089831 4951 kfree_rcu(catchall, rcu);
aaa31047
PNA		 4952 }
4953}
4954
0c2a85ed 4955static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 4956{
8cfd9b0f
PNA		 4957 int i;
4958
273fe3f1
PNA		 4959 if (WARN_ON(set->use > 0))
4960 return;
4961
8cfd9b0f
PNA		 4962 for (i = 0; i < set->num_exprs; i++)
4963 nft_expr_destroy(ctx, set->exprs[i]);
65038428 4964
20a69341 4965 set->ops->destroy(set);
aaa31047 4966 nft_set_catchall_destroy(ctx, set);
38745490 4967 kfree(set->name);
1ff75a3e 4968 kvfree(set);
20a69341
PM		 4969}
4970
7dab8ee3
PNA		 4971static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
4972 const struct nlattr * const nla[])
20a69341 4973{
7dab8ee3
PNA		 4974 struct netlink_ext_ack *extack = info->extack;
4975 u8 genmask = nft_genmask_next(info->net);
67086651 4976 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 4977 struct net *net = info->net;
36dd1bcc 4978 const struct nlattr *attr;
67086651 4979 struct nft_table *table;
20a69341
PM		 4980 struct nft_set *set;
4981 struct nft_ctx ctx;
20a69341 4982
ef4b65e5 4983 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 4984 return -EAFNOSUPPORT;
20a69341 4985
67086651
PNA		 4986 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4987 genmask, NETLINK_CB(skb).portid);
4988 if (IS_ERR(table)) {
4989 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4990 return PTR_ERR(table);
4991 }
20a69341 4992
36dd1bcc
PNA		 4993 if (nla[NFTA_SET_HANDLE]) {
4994 attr = nla[NFTA_SET_HANDLE];
67086651 4995 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 4996 } else {
4997 attr = nla[NFTA_SET_NAME];
67086651 4998 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 4999 }
a8278400 5000
36dd1bcc 5001 if (IS_ERR(set)) {
f80a612d
FFM		 5002 if (PTR_ERR(set) == -ENOENT &&
5003 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
5004 return 0;
5005
36dd1bcc
PNA		 5006 NL_SET_BAD_ATTR(extack, attr);
5007 return PTR_ERR(set);
5008 }
273fe3f1 5009 if (set->use ||
7dab8ee3
PNA		 5010 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
5011 atomic_read(&set->nelems) > 0)) {
36dd1bcc 5012 NL_SET_BAD_ATTR(extack, attr);
20a69341 5013 return -EBUSY;
36dd1bcc 5014 }
20a69341 5015
67086651
PNA		 5016 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5017
ee01d542 5018 return nft_delset(&ctx, set);
20a69341
PM		 5019}
5020
345023b0
PNA		 5021static int nft_validate_register_store(const struct nft_ctx *ctx,
5022 enum nft_registers reg,
5023 const struct nft_data *data,
5024 enum nft_data_types type,
5025 unsigned int len);
5026
97c976d6
PNA		 5027static int nft_setelem_data_validate(const struct nft_ctx *ctx,
5028 struct nft_set *set,
5029 struct nft_set_elem *elem)
20a69341 5030{
fe2811eb 5031 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5032 enum nft_registers dreg;
5033
5034 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 5035 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
5036 set->dtype == NFT_DATA_VERDICT ?
5037 NFT_DATA_VERDICT : NFT_DATA_VALUE,
5038 set->dlen);
20a69341
PM		 5039}
5040
97c976d6
PNA		 5041static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
5042 struct nft_set *set,
5043 const struct nft_set_iter *iter,
5044 struct nft_set_elem *elem)
5045{
5046 return nft_setelem_data_validate(ctx, set, elem);
5047}
5048
aaa31047
PNA		 5049static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
5050 struct nft_set *set)
5051{
5052 u8 genmask = nft_genmask_next(ctx->net);
5053 struct nft_set_elem_catchall *catchall;
5054 struct nft_set_elem elem;
5055 struct nft_set_ext *ext;
5056 int ret = 0;
5057
5058 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5059 ext = nft_set_elem_ext(set, catchall->elem);
5060 if (!nft_set_elem_active(ext, genmask))
5061 continue;
5062
5063 elem.priv = catchall->elem;
5064 ret = nft_setelem_data_validate(ctx, set, &elem);
5065 if (ret < 0)
5066 break;
5067 }
5068
5069 return ret;
5070}
5071
20a69341
PM		 5072int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
5073 struct nft_set_binding *binding)
5074{
5075 struct nft_set_binding *i;
5076 struct nft_set_iter iter;
5077
273fe3f1
PNA		 5078 if (set->use == UINT_MAX)
5079 return -EOVERFLOW;
5080
408070d6 5081 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 5082 return -EBUSY;
5083
11113e19 5084 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 5085 /* If the set is already bound to the same chain all
5086 * jumps are already validated for that chain.
5087 */
5088 list_for_each_entry(i, &set->bindings, list) {
a4684402 5089 if (i->flags & NFT_SET_MAP &&
11113e19 5090 i->chain == binding->chain)
20a69341
PM		 5091 goto bind;
5092 }
5093
8588ac09 5094 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 5095 iter.skip = 0;
5096 iter.count = 0;
5097 iter.err = 0;
5098 iter.fn = nf_tables_bind_check_setelem;
5099
5100 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 5101 if (!iter.err)
5102 iter.err = nft_set_catchall_bind_check(ctx, set);
5103
a02f4248 5104 if (iter.err < 0)
20a69341 5105 return iter.err;
20a69341
PM		 5106 }
5107bind:
5108 binding->chain = ctx->chain;
e688a7f8 5109 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585 5110 nft_set_trans_bind(ctx, set);
273fe3f1 5111 set->use++;
f6ac8585 5112
20a69341
PM		 5113 return 0;
5114}
63aea290 5115EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 5116
3b0a081d
FW		 5117static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
5118 struct nft_set_binding *binding, bool event)
20a69341 5119{
e688a7f8 5120 list_del_rcu(&binding->list);
20a69341 5121
f6ac8585 5122 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 5123 list_del_rcu(&set->list);
f6ac8585
PNA		 5124 if (event)
5125 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
5126 GFP_KERNEL);
5127 }
20a69341
PM		 5128}
5129
c1592a89
PNA		 5130void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set)
5131{
5132 if (nft_set_is_anonymous(set))
5133 nft_clear(ctx->net, set);
5134
5135 set->use++;
5136}
5137EXPORT_SYMBOL_GPL(nf_tables_activate_set);
5138
273fe3f1
PNA		 5139void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
5140 struct nft_set_binding *binding,
5141 enum nft_trans_phase phase)
5142{
5143 switch (phase) {
5144 case NFT_TRANS_PREPARE:
c1592a89
PNA		 5145 if (nft_set_is_anonymous(set))
5146 nft_deactivate_next(ctx->net, set);
5147
273fe3f1
PNA		 5148 set->use--;
5149 return;
5150 case NFT_TRANS_ABORT:
5151 case NFT_TRANS_RELEASE:
5152 set->use--;
954d8297 5153 fallthrough;
273fe3f1
PNA		 5154 default:
5155 nf_tables_unbind_set(ctx, set, binding,
5156 phase == NFT_TRANS_COMMIT);
5157 }
5158}
5159EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
5160
cd5125d8
FW		 5161void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
5162{
f6ac8585 5163 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 5164 nft_set_destroy(ctx, set);
cd5125d8
FW		 5165}
5166EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
5167
3ac4c07a
PM		 5168const struct nft_set_ext_type nft_set_ext_types[] = {
5169 [NFT_SET_EXT_KEY] = {
7d740264 5170 .align = __alignof__(u32),
3ac4c07a
PM		 5171 },
5172 [NFT_SET_EXT_DATA] = {
7d740264 5173 .align = __alignof__(u32),
3ac4c07a 5174 },
563125a7
PNA		 5175 [NFT_SET_EXT_EXPRESSIONS] = {
5176 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 5177 },
8aeff920
PNA		 5178 [NFT_SET_EXT_OBJREF] = {
5179 .len = sizeof(struct nft_object *),
5180 .align = __alignof__(struct nft_object *),
5181 },
3ac4c07a
PM		 5182 [NFT_SET_EXT_FLAGS] = {
5183 .len = sizeof(u8),
5184 .align = __alignof__(u8),
5185 },
c3e1b005
PM		 5186 [NFT_SET_EXT_TIMEOUT] = {
5187 .len = sizeof(u64),
5188 .align = __alignof__(u64),
5189 },
5190 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 5191 .len = sizeof(u64),
5192 .align = __alignof__(u64),
c3e1b005 5193 },
68e942e8
PM		 5194 [NFT_SET_EXT_USERDATA] = {
5195 .len = sizeof(struct nft_userdata),
5196 .align = __alignof__(struct nft_userdata),
5197 },
7b225d0b
PNA		 5198 [NFT_SET_EXT_KEY_END] = {
5199 .align = __alignof__(u32),
5200 },
3ac4c07a 5201};
3ac4c07a 5202
20a69341
PM		 5203/*
5204 * Set elements
5205 */
5206
5207static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
5208 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
5209 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
5210 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 5211 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 5212 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 5213 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
5214 .len = NFT_USERDATA_MAXLEN },
467697d2 5215 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 5216 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
5217 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 5218 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
48b0ae04 5219 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
20a69341
PM		 5220};
5221
5222static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 5223 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
5224 .len = NFT_TABLE_MAXNAMELEN - 1 },
5225 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
5226 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341 5227 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
958bee14 5228 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 5229};
5230
563125a7
PNA		 5231static int nft_set_elem_expr_dump(struct sk_buff *skb,
5232 const struct nft_set *set,
5233 const struct nft_set_ext *ext)
5234{
5235 struct nft_set_elem_expr *elem_expr;
5236 u32 size, num_exprs = 0;
5237 struct nft_expr *expr;
48b0ae04 5238 struct nlattr *nest;
563125a7
PNA		 5239
5240 elem_expr = nft_set_ext_expr(ext);
5241 nft_setelem_expr_foreach(expr, elem_expr, size)
5242 num_exprs++;
5243
5244 if (num_exprs == 1) {
5245 expr = nft_setelem_expr_at(elem_expr, 0);
8daa8fde 5246 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, false) < 0)
563125a7
PNA		 5247 return -1;
5248
5249 return 0;
48b0ae04
PNA		 5250 } else if (num_exprs > 1) {
5251 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
5252 if (nest == NULL)
5253 goto nla_put_failure;
563125a7 5254
48b0ae04
PNA		 5255 nft_setelem_expr_foreach(expr, elem_expr, size) {
5256 expr = nft_setelem_expr_at(elem_expr, size);
8daa8fde 5257 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, false) < 0)
48b0ae04
PNA		 5258 goto nla_put_failure;
5259 }
5260 nla_nest_end(skb, nest);
5261 }
563125a7 5262 return 0;
48b0ae04
PNA		 5263
5264nla_put_failure:
5265 return -1;
563125a7
PNA		 5266}
5267
20a69341
PM		 5268static int nf_tables_fill_setelem(struct sk_buff *skb,
5269 const struct nft_set *set,
5270 const struct nft_set_elem *elem)
5271{
fe2811eb 5272 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 5273 unsigned char *b = skb_tail_pointer(skb);
5274 struct nlattr *nest;
5275
ae0be8de 5276 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 5277 if (nest == NULL)
5278 goto nla_put_failure;
5279
aaa31047
PNA		 5280 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5281 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 5282 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 5283 goto nla_put_failure;
5284
7b225d0b
PNA		 5285 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5286 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5287 NFT_DATA_VALUE, set->klen) < 0)
5288 goto nla_put_failure;
5289
fe2811eb
PM		 5290 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5291 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 5292 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5293 set->dlen) < 0)
5294 goto nla_put_failure;
5295
563125a7
PNA		 5296 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
5297 nft_set_elem_expr_dump(skb, set, ext))
f25ad2e9
PM		 5298 goto nla_put_failure;
5299
8aeff920
PNA		 5300 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5301 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 5302 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 5303 goto nla_put_failure;
5304
fe2811eb
PM		 5305 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5306 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5307 htonl(*nft_set_ext_flags(ext))))
5308 goto nla_put_failure;
20a69341 5309
c3e1b005
PM		 5310 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
5311 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
8e1102d5 5312 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
b46f6ded 5313 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5314 goto nla_put_failure;
5315
5316 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 5317 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 5318
5319 expires = *nft_set_ext_expiration(ext);
8e1102d5 5320 if (time_before64(now, expires))
c3e1b005
PM		 5321 expires -= now;
5322 else
5323 expires = 0;
5324
5325 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 5326 nf_jiffies64_to_msecs(expires),
b46f6ded 5327 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5328 goto nla_put_failure;
5329 }
5330
68e942e8
PM		 5331 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5332 struct nft_userdata *udata;
5333
5334 udata = nft_set_ext_userdata(ext);
5335 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5336 udata->len + 1, udata->data))
5337 goto nla_put_failure;
5338 }
5339
20a69341
PM		 5340 nla_nest_end(skb, nest);
5341 return 0;
5342
5343nla_put_failure:
5344 nlmsg_trim(skb, b);
5345 return -EMSGSIZE;
5346}
5347
5348struct nft_set_dump_args {
5349 const struct netlink_callback *cb;
5350 struct nft_set_iter iter;
5351 struct sk_buff *skb;
5352};
5353
5354static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5355 struct nft_set *set,
20a69341 5356 const struct nft_set_iter *iter,
de70185d 5357 struct nft_set_elem *elem)
20a69341
PM		 5358{
5359 struct nft_set_dump_args *args;
5360
5361 args = container_of(iter, struct nft_set_dump_args, iter);
5362 return nf_tables_fill_setelem(args->skb, set, elem);
5363}
5364
fa803605
LZ		 5365struct nft_set_dump_ctx {
5366 const struct nft_set *set;
5367 struct nft_ctx ctx;
5368};
5369
aaa31047
PNA		 5370static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5371 const struct nft_set *set)
5372{
5373 struct nft_set_elem_catchall *catchall;
5374 u8 genmask = nft_genmask_cur(net);
5375 struct nft_set_elem elem;
5376 struct nft_set_ext *ext;
5377 int ret = 0;
5378
5379 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5380 ext = nft_set_elem_ext(set, catchall->elem);
5381 if (!nft_set_elem_active(ext, genmask) ||
5382 nft_set_elem_expired(ext))
5383 continue;
5384
5385 elem.priv = catchall->elem;
5386 ret = nf_tables_fill_setelem(skb, set, &elem);
5387 break;
5388 }
5389
5390 return ret;
5391}
5392
20a69341
PM		 5393static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5394{
fa803605 5395 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5396 struct net *net = sock_net(skb->sk);
0854db2a 5397 struct nftables_pernet *nft_net;
fa803605 5398 struct nft_table *table;
de70185d 5399 struct nft_set *set;
20a69341 5400 struct nft_set_dump_args args;
fa803605 5401 bool set_found = false;
20a69341
PM		 5402 struct nlmsghdr *nlh;
5403 struct nlattr *nest;
5404 u32 portid, seq;
fa803605 5405 int event;
20a69341 5406
fa803605 5407 rcu_read_lock();
d59d2f82 5408 nft_net = nft_pernet(net);
34002783
PNA		 5409 cb->seq = READ_ONCE(nft_net->base_seq);
5410
0854db2a 5411 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5412 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5413 dump_ctx->ctx.family != table->family)
fa803605 5414 continue;
20a69341 5415
36596dad
PNA		 5416 if (table != dump_ctx->ctx.table)
5417 continue;
20a69341 5418
36596dad
PNA		 5419 list_for_each_entry_rcu(set, &table->sets, list) {
5420 if (set == dump_ctx->set) {
5421 set_found = true;
5422 break;
fa803605 5423 }
fa803605
LZ		 5424 }
5425 break;
5426 }
5427
5428 if (!set_found) {
5429 rcu_read_unlock();
5430 return -ENOENT;
5431 }
20a69341 5432
dedb67c4 5433 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5434 portid = NETLINK_CB(cb->skb).portid;
5435 seq = cb->nlh->nlmsg_seq;
5436
19c28b13
PNA		 5437 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5438 table->family, NFNETLINK_V0, nft_base_seq(net));
5439 if (!nlh)
20a69341
PM		 5440 goto nla_put_failure;
5441
fa803605 5442 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5443 goto nla_put_failure;
5444 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5445 goto nla_put_failure;
5446
ae0be8de 5447 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5448 if (nest == NULL)
5449 goto nla_put_failure;
5450
8588ac09
PNA		 5451 args.cb = cb;
5452 args.skb = skb;
fa803605 5453 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5454 args.iter.skip = cb->args[0];
5455 args.iter.count = 0;
5456 args.iter.err = 0;
5457 args.iter.fn = nf_tables_dump_setelem;
fa803605 5458 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5459
5460 if (!args.iter.err && args.iter.count == cb->args[0])
5461 args.iter.err = nft_set_catchall_dump(net, skb, set);
fa803605 5462 rcu_read_unlock();
20a69341
PM		 5463
5464 nla_nest_end(skb, nest);
5465 nlmsg_end(skb, nlh);
5466
5467 if (args.iter.err && args.iter.err != -EMSGSIZE)
5468 return args.iter.err;
5469 if (args.iter.count == cb->args[0])
5470 return 0;
5471
5472 cb->args[0] = args.iter.count;
5473 return skb->len;
5474
5475nla_put_failure:
fa803605 5476 rcu_read_unlock();
20a69341
PM		 5477 return -ENOSPC;
5478}
5479
90fd131a
FW		 5480static int nf_tables_dump_set_start(struct netlink_callback *cb)
5481{
5482 struct nft_set_dump_ctx *dump_ctx = cb->data;
5483
5484 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5485
5486 return cb->data ? 0 : -ENOMEM;
5487}
5488
fa803605
LZ		 5489static int nf_tables_dump_set_done(struct netlink_callback *cb)
5490{
5491 kfree(cb->data);
5492 return 0;
5493}
5494
d60ce62f
AB		 5495static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5496 const struct nft_ctx *ctx, u32 seq,
5497 u32 portid, int event, u16 flags,
5498 const struct nft_set *set,
5499 const struct nft_set_elem *elem)
5500{
d60ce62f
AB		 5501 struct nlmsghdr *nlh;
5502 struct nlattr *nest;
5503 int err;
5504
dedb67c4 5505 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5506 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5507 NFNETLINK_V0, nft_base_seq(ctx->net));
5508 if (!nlh)
d60ce62f
AB		 5509 goto nla_put_failure;
5510
d60ce62f
AB		 5511 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5512 goto nla_put_failure;
5513 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5514 goto nla_put_failure;
5515
ae0be8de 5516 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5517 if (nest == NULL)
5518 goto nla_put_failure;
5519
5520 err = nf_tables_fill_setelem(skb, set, elem);
5521 if (err < 0)
5522 goto nla_put_failure;
5523
5524 nla_nest_end(skb, nest);
5525
053c095a
JB		 5526 nlmsg_end(skb, nlh);
5527 return 0;
d60ce62f
AB		 5528
5529nla_put_failure:
5530 nlmsg_trim(skb, nlh);
5531 return -1;
5532}
5533
ba0e4d99
PNA		 5534static int nft_setelem_parse_flags(const struct nft_set *set,
5535 const struct nlattr *attr, u32 *flags)
5536{
5537 if (attr == NULL)
5538 return 0;
5539
5540 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5541 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5542 return -EOPNOTSUPP;
ba0e4d99
PNA		 5543 if (!(set->flags & NFT_SET_INTERVAL) &&
5544 *flags & NFT_SET_ELEM_INTERVAL_END)
5545 return -EINVAL;
fc0ae524
PNA		 5546 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5547 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5548 return -EINVAL;
ba0e4d99
PNA		 5549
5550 return 0;
5551}
5552
20a1452c
PNA		 5553static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5554 struct nft_data *key, struct nlattr *attr)
5555{
341b6941
PNA		 5556 struct nft_data_desc desc = {
5557 .type = NFT_DATA_VALUE,
5558 .size = NFT_DATA_VALUE_MAXLEN,
5559 .len = set->klen,
5560 };
20a1452c 5561
341b6941 5562 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5563}
5564
fdb9c405
PNA		 5565static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5566 struct nft_data_desc *desc,
5567 struct nft_data *data,
5568 struct nlattr *attr)
5569{
7e6bc1f6 5570 u32 dtype;
fdb9c405 5571
7e6bc1f6
PNA		 5572 if (set->dtype == NFT_DATA_VERDICT)
5573 dtype = NFT_DATA_VERDICT;
5574 else
5575 dtype = NFT_DATA_VALUE;
5576
341b6941
PNA		 5577 desc->type = dtype;
5578 desc->size = NFT_DATA_VALUE_MAXLEN;
5579 desc->len = set->dlen;
f323ef3a 5580 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5581
341b6941 5582 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5583}
5584
aaa31047
PNA		 5585static void *nft_setelem_catchall_get(const struct net *net,
5586 const struct nft_set *set)
5587{
5588 struct nft_set_elem_catchall *catchall;
5589 u8 genmask = nft_genmask_cur(net);
5590 struct nft_set_ext *ext;
5591 void *priv = NULL;
5592
5593 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5594 ext = nft_set_elem_ext(set, catchall->elem);
5595 if (!nft_set_elem_active(ext, genmask) ||
5596 nft_set_elem_expired(ext))
5597 continue;
5598
5599 priv = catchall->elem;
5600 break;
5601 }
5602
5603 return priv;
5604}
5605
5606static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5607 struct nft_set_elem *elem, u32 flags)
5608{
5609 void *priv;
5610
5611 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5612 priv = set->ops->get(ctx->net, set, elem, flags);
5613 if (IS_ERR(priv))
5614 return PTR_ERR(priv);
5615 } else {
5616 priv = nft_setelem_catchall_get(ctx->net, set);
5617 if (!priv)
5618 return -ENOENT;
5619 }
5620 elem->priv = priv;
5621
5622 return 0;
5623}
5624
ba0e4d99
PNA		 5625static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5626 const struct nlattr *attr)
5627{
5628 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5629 struct nft_set_elem elem;
5630 struct sk_buff *skb;
5631 uint32_t flags = 0;
ba0e4d99
PNA		 5632 int err;
5633
8cb08174
JB		 5634 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5635 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5636 if (err < 0)
5637 return err;
5638
ba0e4d99
PNA		 5639 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5640 if (err < 0)
5641 return err;
5642
aaa31047
PNA		 5643 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5644 return -EINVAL;
5645
5646 if (nla[NFTA_SET_ELEM_KEY]) {
5647 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5648 nla[NFTA_SET_ELEM_KEY]);
5649 if (err < 0)
5650 return err;
5651 }
ba0e4d99 5652
7b225d0b
PNA		 5653 if (nla[NFTA_SET_ELEM_KEY_END]) {
5654 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5655 nla[NFTA_SET_ELEM_KEY_END]);
5656 if (err < 0)
5657 return err;
5658 }
5659
aaa31047
PNA		 5660 err = nft_setelem_get(ctx, set, &elem, flags);
5661 if (err < 0)
5662 return err;
ba0e4d99
PNA		 5663
5664 err = -ENOMEM;
d9adf22a 5665 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 5666 if (skb == NULL)
ee921183 5667 return err;
ba0e4d99
PNA		 5668
5669 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5670 NFT_MSG_NEWSETELEM, 0, set, &elem);
5671 if (err < 0)
ee921183 5672 goto err_fill_setelem;
ba0e4d99 5673
ee921183 5674 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 5675
ee921183 5676err_fill_setelem:
ba0e4d99 5677 kfree_skb(skb);
ee921183 5678 return err;
ba0e4d99
PNA		 5679}
5680
d9adf22a 5681/* called with rcu_read_lock held */
797d4980
PNA		 5682static int nf_tables_getsetelem(struct sk_buff *skb,
5683 const struct nfnl_info *info,
5684 const struct nlattr * const nla[])
ba0e4d99 5685{
797d4980
PNA		 5686 struct netlink_ext_ack *extack = info->extack;
5687 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 5688 u8 family = info->nfmsg->nfgen_family;
797d4980 5689 struct net *net = info->net;
e2b750d7 5690 struct nft_table *table;
ba0e4d99
PNA		 5691 struct nft_set *set;
5692 struct nlattr *attr;
5693 struct nft_ctx ctx;
5694 int rem, err = 0;
5695
e2b750d7 5696 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
92f3e96d 5697 genmask, 0);
e2b750d7
PNA		 5698 if (IS_ERR(table)) {
5699 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5700 return PTR_ERR(table);
5701 }
ba0e4d99 5702
e2b750d7 5703 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
ba0e4d99
PNA		 5704 if (IS_ERR(set))
5705 return PTR_ERR(set);
5706
e2b750d7
PNA		 5707 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5708
797d4980 5709 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 5710 struct netlink_dump_control c = {
90fd131a 5711 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 5712 .dump = nf_tables_dump_set,
5713 .done = nf_tables_dump_set_done,
d9adf22a 5714 .module = THIS_MODULE,
ba0e4d99 5715 };
90fd131a
FW		 5716 struct nft_set_dump_ctx dump_ctx = {
5717 .set = set,
5718 .ctx = ctx,
5719 };
ba0e4d99 5720
90fd131a 5721 c.data = &dump_ctx;
797d4980 5722 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 5723 }
5724
5725 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5726 return -EINVAL;
5727
5728 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5729 err = nft_get_set_elem(&ctx, set, attr);
b53c1166
PNA		 5730 if (err < 0) {
5731 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 5732 break;
b53c1166 5733 }
ba0e4d99
PNA		 5734 }
5735
5736 return err;
5737}
5738
25e94a99
PNA		 5739static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5740 const struct nft_set *set,
5741 const struct nft_set_elem *elem,
6fb721cf 5742 int event)
d60ce62f 5743{
0854db2a 5744 struct nftables_pernet *nft_net;
128ad332
PNA		 5745 struct net *net = ctx->net;
5746 u32 portid = ctx->portid;
d60ce62f 5747 struct sk_buff *skb;
6fb721cf 5748 u16 flags = 0;
d60ce62f
AB		 5749 int err;
5750
128ad332 5751 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 5752 return;
d60ce62f 5753
d60ce62f
AB		 5754 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5755 if (skb == NULL)
5756 goto err;
5757
6fb721cf
PNA		 5758 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5759 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5760
d60ce62f
AB		 5761 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5762 set, elem);
5763 if (err < 0) {
5764 kfree_skb(skb);
5765 goto err;
5766 }
5767
d59d2f82 5768 nft_net = nft_pernet(net);
0854db2a 5769 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 5770 return;
d60ce62f 5771err:
25e94a99 5772 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 5773}
5774
60319eb1
PNA		 5775static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5776 int msg_type,
5777 struct nft_set *set)
5778{
5779 struct nft_trans *trans;
5780
5781 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5782 if (trans == NULL)
5783 return NULL;
5784
5785 nft_trans_elem_set(trans) = set;
5786 return trans;
5787}
5788
a7fc9368
PNA		 5789struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5790 const struct nft_set *set,
5791 const struct nlattr *attr)
5792{
5793 struct nft_expr *expr;
5794 int err;
5795
5796 expr = nft_expr_init(ctx, attr);
5797 if (IS_ERR(expr))
5798 return expr;
5799
5800 err = -EOPNOTSUPP;
a7fc9368
PNA		 5801 if (expr->ops->type->flags & NFT_EXPR_GC) {
5802 if (set->flags & NFT_SET_TIMEOUT)
5803 goto err_set_elem_expr;
5804 if (!set->ops->gc_init)
5805 goto err_set_elem_expr;
5806 set->ops->gc_init(set);
5807 }
5808
5809 return expr;
5810
5811err_set_elem_expr:
5812 nft_expr_destroy(ctx, expr);
5813 return ERR_PTR(err);
5814}
5815
34aae2c2
PNA		 5816static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
5817{
5818 len += nft_set_ext_types[id].len;
5819 if (len > tmpl->ext_len[id] ||
5820 len > U8_MAX)
5821 return -1;
5822
5823 return 0;
5824}
5825
5826static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
5827 void *to, const void *from, u32 len)
5828{
5829 if (nft_set_ext_check(tmpl, id, len) < 0)
5830 return -1;
5831
5832 memcpy(to, from, len);
5833
5834 return 0;
5835}
5836
22fe54d5
PM		 5837void *nft_set_elem_init(const struct nft_set *set,
5838 const struct nft_set_ext_tmpl *tmpl,
7b225d0b
PNA		 5839 const u32 *key, const u32 *key_end,
5840 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 5841{
5842 struct nft_set_ext *ext;
5843 void *elem;
5844
5845 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
5846 if (elem == NULL)
34aae2c2 5847 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 5848
5849 ext = nft_set_elem_ext(set, elem);
5850 nft_set_ext_init(ext, tmpl);
5851
34aae2c2
PNA		 5852 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5853 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
5854 nft_set_ext_key(ext), key, set->klen) < 0)
5855 goto err_ext_check;
5856
5857 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5858 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
5859 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
5860 goto err_ext_check;
5861
5862 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5863 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
5864 nft_set_ext_data(ext), data, set->dlen) < 0)
5865 goto err_ext_check;
5866
79ebb5bb
LGL		 5867 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5868 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
5869 if (expiration == 0)
5870 *nft_set_ext_expiration(ext) += timeout;
5871 }
c3e1b005
PM		 5872 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
5873 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 5874
5875 return elem;
34aae2c2
PNA		 5876
5877err_ext_check:
5878 kfree(elem);
5879
5880 return ERR_PTR(-EINVAL);
fe2811eb
PM		 5881}
5882
563125a7
PNA		 5883static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5884 struct nft_expr *expr)
475beb9c
PNA		 5885{
5886 if (expr->ops->destroy_clone) {
5887 expr->ops->destroy_clone(ctx, expr);
5888 module_put(expr->ops->type->owner);
5889 } else {
5890 nf_tables_expr_destroy(ctx, expr);
5891 }
5892}
5893
563125a7
PNA		 5894static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5895 struct nft_set_elem_expr *elem_expr)
5896{
5897 struct nft_expr *expr;
5898 u32 size;
5899
5900 nft_setelem_expr_foreach(expr, elem_expr, size)
5901 __nft_set_elem_expr_destroy(ctx, expr);
5902}
5903
61f9e292
LZ		 5904void nft_set_elem_destroy(const struct nft_set *set, void *elem,
5905 bool destroy_expr)
61edafbb
PM		 5906{
5907 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
3453c927
PNA		 5908 struct nft_ctx ctx = {
5909 .net = read_pnet(&set->net),
5910 .family = set->table->family,
5911 };
61edafbb 5912
59105446 5913 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 5914 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 5915 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 5916 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 5917 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
371ebcbb 5918
8aeff920
PNA		 5919 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
5920 (*nft_set_ext_obj(ext))->use--;
61edafbb
PM		 5921 kfree(elem);
5922}
5923EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
5924
f8bb7889
PNA		 5925/* Only called from commit path, nft_setelem_data_deactivate() already deals
5926 * with the refcounting from the preparation phase.
59105446 5927 */
3453c927
PNA		 5928static void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
5929 const struct nft_set *set, void *elem)
59105446
PNA		 5930{
5931 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5932
563125a7 5933 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 5934 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
5935
59105446
PNA		 5936 kfree(elem);
5937}
5938
fca05d4d
PNA		 5939int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
5940 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 5941{
5942 struct nft_expr *expr;
5943 int err, i, k;
5944
5945 for (i = 0; i < set->num_exprs; i++) {
42193ffd 5946 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 5947 if (!expr)
5948 goto err_expr;
5949
5950 err = nft_expr_clone(expr, set->exprs[i]);
5951 if (err < 0) {
c485c35f 5952 kfree(expr);
8cfd9b0f
PNA		 5953 goto err_expr;
5954 }
5955 expr_array[i] = expr;
5956 }
5957
5958 return 0;
5959
5960err_expr:
161b838e
CIK		 5961 for (k = i - 1; k >= 0; k--)
5962 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 5963
5964 return -ENOMEM;
5965}
5966
4d8f9065 5967static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 5968 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 5969 const struct nft_set_ext *ext,
5970 struct nft_expr *expr_array[],
5971 u32 num_exprs)
563125a7
PNA		 5972{
5973 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 5974 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 5975 struct nft_expr *expr;
5976 int i, err;
5977
34aae2c2
PNA		 5978 if (num_exprs == 0)
5979 return 0;
5980
5981 for (i = 0; i < num_exprs; i++)
5982 len += expr_array[i]->ops->size;
5983
5984 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
5985 return -EINVAL;
5986
4d8f9065
PNA		 5987 for (i = 0; i < num_exprs; i++) {
5988 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
5989 err = nft_expr_clone(expr, expr_array[i]);
5990 if (err < 0)
5991 goto err_elem_expr_setup;
5992
5993 elem_expr->size += expr_array[i]->ops->size;
5994 nft_expr_destroy(ctx, expr_array[i]);
5995 expr_array[i] = NULL;
5996 }
5997
5998 return 0;
5999
6000err_elem_expr_setup:
6001 for (; i < num_exprs; i++) {
6002 nft_expr_destroy(ctx, expr_array[i]);
6003 expr_array[i] = NULL;
6004 }
563125a7 6005
4d8f9065 6006 return -ENOMEM;
563125a7
PNA		 6007}
6008
aaa31047
PNA		 6009struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
6010 const struct nft_set *set)
6011{
6012 struct nft_set_elem_catchall *catchall;
6013 u8 genmask = nft_genmask_cur(net);
6014 struct nft_set_ext *ext;
6015
6016 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6017 ext = nft_set_elem_ext(set, catchall->elem);
6018 if (nft_set_elem_active(ext, genmask) &&
6019 !nft_set_elem_expired(ext))
6020 return ext;
6021 }
6022
6023 return NULL;
6024}
6025EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
6026
6027void *nft_set_catchall_gc(const struct nft_set *set)
6028{
6029 struct nft_set_elem_catchall *catchall, *next;
6030 struct nft_set_ext *ext;
6031 void *elem = NULL;
6032
6033 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6034 ext = nft_set_elem_ext(set, catchall->elem);
6035
6036 if (!nft_set_elem_expired(ext) ||
6037 nft_set_elem_mark_busy(ext))
6038 continue;
6039
6040 elem = catchall->elem;
6041 list_del_rcu(&catchall->list);
6042 kfree_rcu(catchall, rcu);
6043 break;
6044 }
6045
6046 return elem;
6047}
6048EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
6049
6050static int nft_setelem_catchall_insert(const struct net *net,
6051 struct nft_set *set,
6052 const struct nft_set_elem *elem,
6053 struct nft_set_ext **pext)
6054{
6055 struct nft_set_elem_catchall *catchall;
6056 u8 genmask = nft_genmask_next(net);
6057 struct nft_set_ext *ext;
6058
6059 list_for_each_entry(catchall, &set->catchall_list, list) {
6060 ext = nft_set_elem_ext(set, catchall->elem);
6061 if (nft_set_elem_active(ext, genmask)) {
6062 *pext = ext;
6063 return -EEXIST;
6064 }
6065 }
6066
6067 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
6068 if (!catchall)
6069 return -ENOMEM;
6070
6071 catchall->elem = elem->priv;
6072 list_add_tail_rcu(&catchall->list, &set->catchall_list);
6073
6074 return 0;
6075}
6076
6077static int nft_setelem_insert(const struct net *net,
6078 struct nft_set *set,
6079 const struct nft_set_elem *elem,
6080 struct nft_set_ext **ext, unsigned int flags)
6081{
6082 int ret;
6083
6084 if (flags & NFT_SET_ELEM_CATCHALL)
6085 ret = nft_setelem_catchall_insert(net, set, elem, ext);
6086 else
6087 ret = set->ops->insert(net, set, elem, ext);
6088
6089 return ret;
6090}
6091
6092static bool nft_setelem_is_catchall(const struct nft_set *set,
6093 const struct nft_set_elem *elem)
6094{
6095 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6096
6097 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
6098 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
6099 return true;
6100
6101 return false;
6102}
6103
6104static void nft_setelem_activate(struct net *net, struct nft_set *set,
6105 struct nft_set_elem *elem)
6106{
6107 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6108
6109 if (nft_setelem_is_catchall(set, elem)) {
6110 nft_set_elem_change_active(net, set, ext);
6111 nft_set_elem_clear_busy(ext);
6112 } else {
6113 set->ops->activate(net, set, elem);
6114 }
6115}
6116
6117static int nft_setelem_catchall_deactivate(const struct net *net,
6118 struct nft_set *set,
6119 struct nft_set_elem *elem)
6120{
6121 struct nft_set_elem_catchall *catchall;
6122 struct nft_set_ext *ext;
6123
6124 list_for_each_entry(catchall, &set->catchall_list, list) {
6125 ext = nft_set_elem_ext(set, catchall->elem);
6126 if (!nft_is_active(net, ext) ||
6127 nft_set_elem_mark_busy(ext))
6128 continue;
6129
6130 kfree(elem->priv);
6131 elem->priv = catchall->elem;
6132 nft_set_elem_change_active(net, set, ext);
6133 return 0;
6134 }
6135
6136 return -ENOENT;
6137}
6138
6139static int __nft_setelem_deactivate(const struct net *net,
6140 struct nft_set *set,
6141 struct nft_set_elem *elem)
6142{
6143 void *priv;
6144
6145 priv = set->ops->deactivate(net, set, elem);
6146 if (!priv)
6147 return -ENOENT;
6148
6149 kfree(elem->priv);
6150 elem->priv = priv;
6151 set->ndeact++;
6152
6153 return 0;
6154}
6155
6156static int nft_setelem_deactivate(const struct net *net,
6157 struct nft_set *set,
6158 struct nft_set_elem *elem, u32 flags)
6159{
6160 int ret;
6161
6162 if (flags & NFT_SET_ELEM_CATCHALL)
6163 ret = nft_setelem_catchall_deactivate(net, set, elem);
6164 else
6165 ret = __nft_setelem_deactivate(net, set, elem);
6166
6167 return ret;
6168}
6169
6170static void nft_setelem_catchall_remove(const struct net *net,
6171 const struct nft_set *set,
6172 const struct nft_set_elem *elem)
6173{
6174 struct nft_set_elem_catchall *catchall, *next;
6175
6176 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6177 if (catchall->elem == elem->priv) {
6178 list_del_rcu(&catchall->list);
ae089831 6179 kfree_rcu(catchall, rcu);
aaa31047
PNA		 6180 break;
6181 }
6182 }
6183}
6184
6185static void nft_setelem_remove(const struct net *net,
6186 const struct nft_set *set,
6187 const struct nft_set_elem *elem)
6188{
6189 if (nft_setelem_is_catchall(set, elem))
6190 nft_setelem_catchall_remove(net, set, elem);
6191 else
6192 set->ops->remove(net, set, elem);
6193}
6194
88cccd90
PNA		 6195static bool nft_setelem_valid_key_end(const struct nft_set *set,
6196 struct nlattr **nla, u32 flags)
6197{
6198 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
6199 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
6200 if (flags & NFT_SET_ELEM_INTERVAL_END)
6201 return false;
96df8360
PNA		 6202
6203 if (nla[NFTA_SET_ELEM_KEY_END] &&
6204 flags & NFT_SET_ELEM_CATCHALL)
88cccd90
PNA		 6205 return false;
6206 } else {
6207 if (nla[NFTA_SET_ELEM_KEY_END])
6208 return false;
6209 }
6210
6211 return true;
6212}
6213
60319eb1 6214static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 6215 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 6216{
8cfd9b0f 6217 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 6218 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 6219 u8 genmask = nft_genmask_next(ctx->net);
664899e8 6220 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 6221 struct nft_set_ext_tmpl tmpl;
c016c7e4 6222 struct nft_set_ext *ext, *ext2;
20a69341
PM		 6223 struct nft_set_elem elem;
6224 struct nft_set_binding *binding;
8aeff920 6225 struct nft_object *obj = NULL;
68e942e8 6226 struct nft_userdata *udata;
20a1452c 6227 struct nft_data_desc desc;
20a69341 6228 enum nft_registers dreg;
60319eb1 6229 struct nft_trans *trans;
c3e1b005 6230 u64 timeout;
79ebb5bb 6231 u64 expiration;
8cfd9b0f 6232 int err, i;
68e942e8 6233 u8 ulen;
20a69341 6234
8cb08174
JB		 6235 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6236 nft_set_elem_policy, NULL);
20a69341
PM		 6237 if (err < 0)
6238 return err;
6239
fe2811eb
PM		 6240 nft_set_ext_prepare(&tmpl);
6241
0e9091d6
PNA		 6242 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6243 if (err < 0)
6244 return err;
aaa31047 6245
d4eb7e39
PNA		 6246 if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
6247 (!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
aaa31047
PNA		 6248 return -EINVAL;
6249
c39ba4de
PNA		 6250 if (flags != 0) {
6251 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6252 if (err < 0)
6253 return err;
6254 }
20a69341
PM		 6255
6256 if (set->flags & NFT_SET_MAP) {
6257 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 6258 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 6259 return -EINVAL;
6260 } else {
6261 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6262 return -EINVAL;
6263 }
6264
5a2f3dc3
PNA		 6265 if (set->flags & NFT_SET_OBJECT) {
6266 if (!nla[NFTA_SET_ELEM_OBJREF] &&
6267 !(flags & NFT_SET_ELEM_INTERVAL_END))
6268 return -EINVAL;
6269 } else {
6270 if (nla[NFTA_SET_ELEM_OBJREF])
6271 return -EINVAL;
6272 }
6273
88cccd90
PNA		 6274 if (!nft_setelem_valid_key_end(set, nla, flags))
6275 return -EINVAL;
6276
bffc124b
PNA		 6277 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
6278 (nla[NFTA_SET_ELEM_DATA] ||
6279 nla[NFTA_SET_ELEM_OBJREF] ||
6280 nla[NFTA_SET_ELEM_TIMEOUT] ||
6281 nla[NFTA_SET_ELEM_EXPIRATION] ||
6282 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 6283 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 6284 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 6285 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 6286 return -EINVAL;
6287
c3e1b005
PM		 6288 timeout = 0;
6289 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6290 if (!(set->flags & NFT_SET_TIMEOUT))
6291 return -EINVAL;
8e1102d5
FW		 6292 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6293 &timeout);
6294 if (err)
6295 return err;
33c7aba0
PNA		 6296 } else if (set->flags & NFT_SET_TIMEOUT &&
6297 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
123b9961 6298 timeout = READ_ONCE(set->timeout);
c3e1b005
PM		 6299 }
6300
79ebb5bb
LGL		 6301 expiration = 0;
6302 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6303 if (!(set->flags & NFT_SET_TIMEOUT))
6304 return -EINVAL;
6305 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6306 &expiration);
6307 if (err)
6308 return err;
6309 }
6310
8cfd9b0f
PNA		 6311 if (nla[NFTA_SET_ELEM_EXPR]) {
6312 struct nft_expr *expr;
6313
664899e8 6314 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 6315 return -EOPNOTSUPP;
6316
40944452
PNA		 6317 expr = nft_set_elem_expr_alloc(ctx, set,
6318 nla[NFTA_SET_ELEM_EXPR]);
6319 if (IS_ERR(expr))
6320 return PTR_ERR(expr);
65038428 6321
8cfd9b0f 6322 expr_array[0] = expr;
664899e8 6323 num_exprs = 1;
65038428 6324
664899e8 6325 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 6326 err = -EOPNOTSUPP;
65038428 6327 goto err_set_elem_expr;
8cfd9b0f 6328 }
48b0ae04
PNA		 6329 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6330 struct nft_expr *expr;
6331 struct nlattr *tmp;
6332 int left;
65038428 6333
48b0ae04
PNA		 6334 i = 0;
6335 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 6336 if (i == NFT_SET_EXPR_MAX ||
6337 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 6338 err = -E2BIG;
6339 goto err_set_elem_expr;
6340 }
6341 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6342 err = -EINVAL;
6343 goto err_set_elem_expr;
6344 }
6345 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6346 if (IS_ERR(expr)) {
6347 err = PTR_ERR(expr);
6348 goto err_set_elem_expr;
6349 }
6350 expr_array[i] = expr;
664899e8 6351 num_exprs++;
48b0ae04 6352
664899e8 6353 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6354 err = -EOPNOTSUPP;
6355 goto err_set_elem_expr;
6356 }
6357 i++;
6358 }
664899e8 6359 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6360 err = -EOPNOTSUPP;
65038428 6361 goto err_set_elem_expr;
48b0ae04 6362 }
33c7aba0
PNA		 6363 } else if (set->num_exprs > 0 &&
6364 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
8cfd9b0f
PNA		 6365 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6366 if (err < 0)
6367 goto err_set_elem_expr_clone;
664899e8
PNA		 6368
6369 num_exprs = set->num_exprs;
40944452
PNA		 6370 }
6371
aaa31047
PNA		 6372 if (nla[NFTA_SET_ELEM_KEY]) {
6373 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6374 nla[NFTA_SET_ELEM_KEY]);
6375 if (err < 0)
6376 goto err_set_elem_expr;
20a69341 6377
c39ba4de
PNA		 6378 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6379 if (err < 0)
6380 goto err_parse_key;
aaa31047 6381 }
7b225d0b
PNA		 6382
6383 if (nla[NFTA_SET_ELEM_KEY_END]) {
6384 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6385 nla[NFTA_SET_ELEM_KEY_END]);
6386 if (err < 0)
6387 goto err_parse_key;
6388
c39ba4de
PNA		 6389 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6390 if (err < 0)
6391 goto err_parse_key_end;
7b225d0b
PNA		 6392 }
6393
c3e1b005 6394 if (timeout > 0) {
c39ba4de
PNA		 6395 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6396 if (err < 0)
6397 goto err_parse_key_end;
6398
123b9961 6399 if (timeout != READ_ONCE(set->timeout)) {
c39ba4de
PNA		 6400 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6401 if (err < 0)
6402 goto err_parse_key_end;
6403 }
c3e1b005 6404 }
fe2811eb 6405
664899e8
PNA		 6406 if (num_exprs) {
6407 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6408 size += expr_array[i]->ops->size;
6409
c39ba4de
PNA		 6410 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6411 sizeof(struct nft_set_elem_expr) + size);
6412 if (err < 0)
6413 goto err_parse_key_end;
563125a7 6414 }
40944452 6415
8aeff920 6416 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6417 obj = nft_obj_lookup(ctx->net, ctx->table,
6418 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6419 set->objtype, genmask);
8aeff920
PNA		 6420 if (IS_ERR(obj)) {
6421 err = PTR_ERR(obj);
7b225d0b 6422 goto err_parse_key_end;
8aeff920 6423 }
c39ba4de
PNA		 6424 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6425 if (err < 0)
6426 goto err_parse_key_end;
8aeff920
PNA		 6427 }
6428
20a69341 6429 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6430 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6431 nla[NFTA_SET_ELEM_DATA]);
20a69341 6432 if (err < 0)
7b225d0b 6433 goto err_parse_key_end;
20a69341 6434
20a69341
PM		 6435 dreg = nft_type_to_reg(set->dtype);
6436 list_for_each_entry(binding, &set->bindings, list) {
6437 struct nft_ctx bind_ctx = {
58c78e10 6438 .net = ctx->net,
36596dad 6439 .family = ctx->family,
20a69341 6440 .table = ctx->table,
7c95f6d8 6441 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6442 };
6443
11113e19
PM		 6444 if (!(binding->flags & NFT_SET_MAP))
6445 continue;
6446
1ec10212 6447 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6448 &elem.data.val,
20a1452c 6449 desc.type, desc.len);
20a69341 6450 if (err < 0)
7b225d0b 6451 goto err_parse_data;
a654de8f 6452
20a1452c 6453 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6454 (elem.data.val.verdict.code == NFT_GOTO ||
6455 elem.data.val.verdict.code == NFT_JUMP))
00c320f9 6456 nft_validate_state_update(ctx->table,
a654de8f 6457 NFT_VALIDATE_NEED);
20a69341 6458 }
fe2811eb 6459
c39ba4de
PNA		 6460 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6461 if (err < 0)
6462 goto err_parse_data;
20a69341
PM		 6463 }
6464
68e942e8
PM		 6465 /* The full maximum length of userdata can exceed the maximum
6466 * offset value (U8_MAX) for following extensions, therefor it
6467 * must be the last extension added.
6468 */
6469 ulen = 0;
6470 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6471 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6472 if (ulen > 0) {
6473 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6474 ulen);
6475 if (err < 0)
6476 goto err_parse_data;
6477 }
68e942e8
PM		 6478 }
6479
7b225d0b 6480 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6481 elem.key_end.val.data, elem.data.val.data,
33758c89 6482 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6483 if (IS_ERR(elem.priv)) {
6484 err = PTR_ERR(elem.priv);
7b225d0b 6485 goto err_parse_data;
34aae2c2 6486 }
fe2811eb
PM		 6487
6488 ext = nft_set_elem_ext(set, elem.priv);
6489 if (flags)
6490 *nft_set_ext_flags(ext) = flags;
34aae2c2 6491
68e942e8 6492 if (ulen > 0) {
34aae2c2
PNA		 6493 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6494 err = -EINVAL;
6495 goto err_elem_userdata;
6496 }
68e942e8
PM		 6497 udata = nft_set_ext_userdata(ext);
6498 udata->len = ulen - 1;
6499 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6500 }
8aeff920
PNA		 6501 if (obj) {
6502 *nft_set_ext_obj(ext) = obj;
6503 obj->use++;
6504 }
34aae2c2 6505 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6506 if (err < 0)
34aae2c2 6507 goto err_elem_free;
fe2811eb 6508
60319eb1 6509 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6510 if (trans == NULL) {
6511 err = -ENOMEM;
34aae2c2 6512 goto err_elem_free;
4d8f9065 6513 }
60319eb1 6514
69086658 6515 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
aaa31047
PNA		 6516
6517 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
c016c7e4
PNA		 6518 if (err) {
6519 if (err == -EEXIST) {
9744a6fc
PNA		 6520 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6521 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6522 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6523 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6524 goto err_element_clash;
8aeff920
PNA		 6525 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6526 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6527 memcmp(nft_set_ext_data(ext),
6528 nft_set_ext_data(ext2), set->dlen) != 0) ||
6529 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6530 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6531 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6532 goto err_element_clash;
c016c7e4
PNA		 6533 else if (!(nlmsg_flags & NLM_F_EXCL))
6534 err = 0;
8c2d45b2
PNA		 6535 } else if (err == -ENOTEMPTY) {
6536 /* ENOTEMPTY reports overlapping between this element
6537 * and an existing one.
6538 */
6539 err = -EEXIST;
c016c7e4 6540 }
7b225d0b 6541 goto err_element_clash;
c016c7e4 6542 }
20a69341 6543
aaa31047 6544 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
35d0ac90
PNA		 6545 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
6546 err = -ENFILE;
7b225d0b 6547 goto err_set_full;
35d0ac90
PNA		 6548 }
6549
60319eb1 6550 nft_trans_elem(trans) = elem;
0854db2a 6551 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6552 return 0;
6553
7b225d0b 6554err_set_full:
aaa31047 6555 nft_setelem_remove(ctx->net, set, &elem);
7b225d0b 6556err_element_clash:
60319eb1 6557 kfree(trans);
34aae2c2 6558err_elem_free:
b91d9036
TY		 6559 if (obj)
6560 obj->use--;
34aae2c2 6561err_elem_userdata:
475beb9c 6562 nf_tables_set_elem_destroy(ctx, set, elem.priv);
7b225d0b 6563err_parse_data:
20a69341 6564 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6565 nft_data_release(&elem.data.val, desc.type);
7b225d0b
PNA		 6566err_parse_key_end:
6567 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6568err_parse_key:
20a1452c 6569 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6570err_set_elem_expr:
664899e8 6571 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6572 nft_expr_destroy(ctx, expr_array[i]);
6573err_set_elem_expr_clone:
20a69341
PM		 6574 return err;
6575}
6576
7dab8ee3
PNA		 6577static int nf_tables_newsetelem(struct sk_buff *skb,
6578 const struct nfnl_info *info,
6579 const struct nlattr * const nla[])
20a69341 6580{
7dab8ee3
PNA		 6581 struct netlink_ext_ack *extack = info->extack;
6582 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6583 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6584 struct net *net = info->net;
20a69341 6585 const struct nlattr *attr;
e2b750d7 6586 struct nft_table *table;
20a69341
PM		 6587 struct nft_set *set;
6588 struct nft_ctx ctx;
a654de8f 6589 int rem, err;
20a69341 6590
7d5570ca
PNA		 6591 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6592 return -EINVAL;
6593
e2b750d7
PNA		 6594 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6595 genmask, NETLINK_CB(skb).portid);
6596 if (IS_ERR(table)) {
6597 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6598 return PTR_ERR(table);
6599 }
20a69341 6600
e2b750d7 6601 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17
PNA		 6602 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6603 if (IS_ERR(set))
6604 return PTR_ERR(set);
958bee14 6605
20a69341
PM		 6606 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6607 return -EBUSY;
6608
e2b750d7
PNA		 6609 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6610
20a69341 6611 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6612 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6613 if (err < 0) {
6614 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6615 return err;
b53c1166 6616 }
20a69341 6617 }
a654de8f 6618
00c320f9 6619 if (table->validate_state == NFT_VALIDATE_DO)
e2b750d7 6620 return nft_table_validate(net, table);
a654de8f
PNA		 6621
6622 return 0;
20a69341
PM		 6623}
6624
59105446
PNA		 6625/**
6626 * nft_data_hold - hold a nft_data item
6627 *
6628 * @data: struct nft_data to release
6629 * @type: type of data
6630 *
6631 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6632 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6633 * NFT_GOTO verdicts. This function must be called on active data objects
6634 * from the second phase of the commit protocol.
6635 */
bb7b40ae 6636void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 6637{
d0e2c7de
PNA		 6638 struct nft_chain *chain;
6639 struct nft_rule *rule;
6640
59105446
PNA		 6641 if (type == NFT_DATA_VERDICT) {
6642 switch (data->verdict.code) {
6643 case NFT_JUMP:
6644 case NFT_GOTO:
d0e2c7de
PNA		 6645 chain = data->verdict.chain;
6646 chain->use++;
6647
6648 if (!nft_chain_is_bound(chain))
6649 break;
6650
6651 chain->table->use++;
6652 list_for_each_entry(rule, &chain->rules, list)
6653 chain->use++;
6654
6655 nft_chain_add(chain->table, chain);
59105446
PNA		 6656 break;
6657 }
6658 }
6659}
6660
f8bb7889
PNA		 6661static void nft_setelem_data_activate(const struct net *net,
6662 const struct nft_set *set,
6663 struct nft_set_elem *elem)
59105446
PNA		 6664{
6665 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6666
6667 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6668 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6669 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6670 (*nft_set_ext_obj(ext))->use++;
6671}
6672
f8bb7889
PNA		 6673static void nft_setelem_data_deactivate(const struct net *net,
6674 const struct nft_set *set,
6675 struct nft_set_elem *elem)
59105446
PNA		 6676{
6677 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6678
6679 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6680 nft_data_release(nft_set_ext_data(ext), set->dtype);
6681 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6682 (*nft_set_ext_obj(ext))->use--;
6683}
6684
60319eb1 6685static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 6686 const struct nlattr *attr)
6687{
6688 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 6689 struct nft_set_ext_tmpl tmpl;
20a69341 6690 struct nft_set_elem elem;
3971ca14 6691 struct nft_set_ext *ext;
60319eb1 6692 struct nft_trans *trans;
3971ca14 6693 u32 flags = 0;
20a69341
PM		 6694 int err;
6695
8cb08174
JB		 6696 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6697 nft_set_elem_policy, NULL);
20a69341 6698 if (err < 0)
20a1452c 6699 return err;
20a69341 6700
aaa31047
PNA		 6701 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6702 if (err < 0)
6703 return err;
6704
6705 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 6706 return -EINVAL;
20a69341 6707
88cccd90
PNA		 6708 if (!nft_setelem_valid_key_end(set, nla, flags))
6709 return -EINVAL;
6710
3971ca14
PNA		 6711 nft_set_ext_prepare(&tmpl);
6712
c39ba4de
PNA		 6713 if (flags != 0) {
6714 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6715 if (err < 0)
6716 return err;
6717 }
3971ca14 6718
aaa31047
PNA		 6719 if (nla[NFTA_SET_ELEM_KEY]) {
6720 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6721 nla[NFTA_SET_ELEM_KEY]);
6722 if (err < 0)
6723 return err;
20a69341 6724
c39ba4de
PNA		 6725 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6726 if (err < 0)
6727 goto fail_elem;
aaa31047 6728 }
3971ca14 6729
7b225d0b
PNA		 6730 if (nla[NFTA_SET_ELEM_KEY_END]) {
6731 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6732 nla[NFTA_SET_ELEM_KEY_END]);
6733 if (err < 0)
c39ba4de 6734 goto fail_elem;
7b225d0b 6735
c39ba4de
PNA		 6736 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6737 if (err < 0)
6738 goto fail_elem_key_end;
7b225d0b
PNA		 6739 }
6740
3971ca14 6741 err = -ENOMEM;
7b225d0b
PNA		 6742 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6743 elem.key_end.val.data, NULL, 0, 0,
33758c89 6744 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6745 if (IS_ERR(elem.priv)) {
6746 err = PTR_ERR(elem.priv);
c39ba4de 6747 goto fail_elem_key_end;
34aae2c2 6748 }
3971ca14
PNA		 6749
6750 ext = nft_set_elem_ext(set, elem.priv);
6751 if (flags)
6752 *nft_set_ext_flags(ext) = flags;
6753
60319eb1 6754 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 6755 if (trans == NULL)
6756 goto fail_trans;
20a69341 6757
aaa31047
PNA		 6758 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6759 if (err < 0)
20a1452c 6760 goto fail_ops;
cc02e457 6761
f8bb7889 6762 nft_setelem_data_deactivate(ctx->net, set, &elem);
59105446 6763
60319eb1 6764 nft_trans_elem(trans) = elem;
0854db2a 6765 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 6766 return 0;
cc02e457 6767
20a1452c 6768fail_ops:
cc02e457 6769 kfree(trans);
20a1452c 6770fail_trans:
3971ca14 6771 kfree(elem.priv);
c39ba4de
PNA		 6772fail_elem_key_end:
6773 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 6774fail_elem:
6775 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 6776 return err;
6777}
6778
e6ba7cb6
PNA		 6779static int nft_setelem_flush(const struct nft_ctx *ctx,
6780 struct nft_set *set,
6781 const struct nft_set_iter *iter,
6782 struct nft_set_elem *elem)
8411b644
PNA		 6783{
6784 struct nft_trans *trans;
6785 int err;
6786
6787 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6788 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6789 if (!trans)
6790 return -ENOMEM;
6791
1ba1c414 6792 if (!set->ops->flush(ctx->net, set, elem->priv)) {
8411b644
PNA		 6793 err = -ENOENT;
6794 goto err1;
6795 }
b2c11e4b 6796 set->ndeact++;
8411b644 6797
f8bb7889 6798 nft_setelem_data_deactivate(ctx->net, set, elem);
de70185d
PNA		 6799 nft_trans_elem_set(trans) = set;
6800 nft_trans_elem(trans) = *elem;
0854db2a 6801 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 6802
6803 return 0;
6804err1:
6805 kfree(trans);
6806 return err;
6807}
6808
aaa31047
PNA		 6809static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6810 struct nft_set *set,
6811 struct nft_set_elem *elem)
6812{
6813 struct nft_trans *trans;
6814
6815 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6816 sizeof(struct nft_trans_elem), GFP_KERNEL);
6817 if (!trans)
6818 return -ENOMEM;
6819
6820 nft_setelem_data_deactivate(ctx->net, set, elem);
6821 nft_trans_elem_set(trans) = set;
6822 nft_trans_elem(trans) = *elem;
6823 nft_trans_commit_list_add_tail(ctx->net, trans);
6824
6825 return 0;
6826}
6827
6828static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6829 struct nft_set *set)
6830{
6831 u8 genmask = nft_genmask_next(ctx->net);
6832 struct nft_set_elem_catchall *catchall;
6833 struct nft_set_elem elem;
6834 struct nft_set_ext *ext;
6835 int ret = 0;
6836
6837 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6838 ext = nft_set_elem_ext(set, catchall->elem);
6839 if (!nft_set_elem_active(ext, genmask) ||
6840 nft_set_elem_mark_busy(ext))
6841 continue;
6842
6843 elem.priv = catchall->elem;
6844 ret = __nft_set_catchall_flush(ctx, set, &elem);
6845 if (ret < 0)
6846 break;
6847 }
6848
6849 return ret;
6850}
6851
e6ba7cb6
PNA		 6852static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
6853{
6854 struct nft_set_iter iter = {
6855 .genmask = genmask,
6856 .fn = nft_setelem_flush,
6857 };
6858
6859 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 6860 if (!iter.err)
6861 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 6862
6863 return iter.err;
6864}
6865
7dab8ee3
PNA		 6866static int nf_tables_delsetelem(struct sk_buff *skb,
6867 const struct nfnl_info *info,
6868 const struct nlattr * const nla[])
20a69341 6869{
7dab8ee3
PNA		 6870 struct netlink_ext_ack *extack = info->extack;
6871 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6872 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6873 struct net *net = info->net;
20a69341 6874 const struct nlattr *attr;
e2b750d7 6875 struct nft_table *table;
20a69341
PM		 6876 struct nft_set *set;
6877 struct nft_ctx ctx;
60319eb1 6878 int rem, err = 0;
20a69341 6879
e2b750d7
PNA		 6880 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6881 genmask, NETLINK_CB(skb).portid);
6882 if (IS_ERR(table)) {
6883 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6884 return PTR_ERR(table);
6885 }
20a69341 6886
e2b750d7 6887 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
20a69341
PM		 6888 if (IS_ERR(set))
6889 return PTR_ERR(set);
6890 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6891 return -EBUSY;
6892
e2b750d7
PNA		 6893 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6894
e6ba7cb6
PNA		 6895 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6896 return nft_set_flush(&ctx, set, genmask);
8411b644 6897
20a69341
PM		 6898 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6899 err = nft_del_setelem(&ctx, set, attr);
f80a612d
FFM		 6900 if (err == -ENOENT &&
6901 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
6902 continue;
6903
b53c1166
PNA		 6904 if (err < 0) {
6905 NL_SET_BAD_ATTR(extack, attr);
60319eb1 6906 break;
b53c1166 6907 }
20a69341 6908 }
60319eb1 6909 return err;
20a69341
PM		 6910}
6911
cfed7e1b
PM		 6912void nft_set_gc_batch_release(struct rcu_head *rcu)
6913{
6914 struct nft_set_gc_batch *gcb;
6915 unsigned int i;
6916
6917 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
6918 for (i = 0; i < gcb->head.cnt; i++)
61f9e292 6919 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
cfed7e1b
PM		 6920 kfree(gcb);
6921}
cfed7e1b
PM		 6922
6923struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
6924 gfp_t gfp)
6925{
6926 struct nft_set_gc_batch *gcb;
6927
6928 gcb = kzalloc(sizeof(*gcb), gfp);
6929 if (gcb == NULL)
6930 return gcb;
6931 gcb->head.set = set;
6932 return gcb;
6933}
cfed7e1b 6934
e5009240
PNA		 6935/*
6936 * Stateful objects
6937 */
6938
6939/**
6940 * nft_register_obj- register nf_tables stateful object type
3db86c39 6941 * @obj_type: object type
e5009240
PNA		 6942 *
6943 * Registers the object type for use with nf_tables. Returns zero on
6944 * success or a negative errno code otherwise.
6945 */
6946int nft_register_obj(struct nft_object_type *obj_type)
6947{
6948 if (obj_type->type == NFT_OBJECT_UNSPEC)
6949 return -EINVAL;
6950
6951 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6952 list_add_rcu(&obj_type->list, &nf_tables_objects);
6953 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6954 return 0;
6955}
6956EXPORT_SYMBOL_GPL(nft_register_obj);
6957
6958/**
6959 * nft_unregister_obj - unregister nf_tables object type
3db86c39 6960 * @obj_type: object type
e5009240
PNA		 6961 *
6962 * Unregisters the object type for use with nf_tables.
6963 */
6964void nft_unregister_obj(struct nft_object_type *obj_type)
6965{
6966 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6967 list_del_rcu(&obj_type->list);
6968 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6969}
6970EXPORT_SYMBOL_GPL(nft_unregister_obj);
6971
4d44175a
FW		 6972struct nft_object *nft_obj_lookup(const struct net *net,
6973 const struct nft_table *table,
cac20fcd
PNA		 6974 const struct nlattr *nla, u32 objtype,
6975 u8 genmask)
e5009240 6976{
4d44175a
FW		 6977 struct nft_object_hash_key k = { .table = table };
6978 char search[NFT_OBJ_MAXNAMELEN];
6979 struct rhlist_head *tmp, *list;
e5009240
PNA		 6980 struct nft_object *obj;
6981
872f6903 6982 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 6983 k.name = search;
6984
6985 WARN_ON_ONCE(!rcu_read_lock_held() &&
6986 !lockdep_commit_lock_is_held(net));
6987
6988 rcu_read_lock();
6989 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
6990 if (!list)
6991 goto out;
6992
6993 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
6994 if (objtype == obj->ops->type->type &&
6995 nft_active_genmask(obj, genmask)) {
6996 rcu_read_unlock();
e5009240 6997 return obj;
4d44175a 6998 }
e5009240 6999 }
4d44175a
FW		 7000out:
7001 rcu_read_unlock();
e5009240
PNA		 7002 return ERR_PTR(-ENOENT);
7003}
cac20fcd 7004EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 7005
cac20fcd
PNA		 7006static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
7007 const struct nlattr *nla,
7008 u32 objtype, u8 genmask)
3ecbfd65
HS		 7009{
7010 struct nft_object *obj;
7011
7012 list_for_each_entry(obj, &table->objects, list) {
7013 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
7014 objtype == obj->ops->type->type &&
7015 nft_active_genmask(obj, genmask))
7016 return obj;
7017 }
7018 return ERR_PTR(-ENOENT);
7019}
7020
e5009240 7021static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 7022 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
7023 .len = NFT_TABLE_MAXNAMELEN - 1 },
7024 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
7025 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 7026 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
7027 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 7028 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 7029 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
7030 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 7031};
7032
84fba055
FW		 7033static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
7034 const struct nft_object_type *type,
e5009240
PNA		 7035 const struct nlattr *attr)
7036{
5b4c6e38 7037 struct nlattr **tb;
dfc46034 7038 const struct nft_object_ops *ops;
e5009240 7039 struct nft_object *obj;
5b4c6e38
GS		 7040 int err = -ENOMEM;
7041
7042 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
7043 if (!tb)
7044 goto err1;
e5009240
PNA		 7045
7046 if (attr) {
8cb08174
JB		 7047 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
7048 type->policy, NULL);
e5009240 7049 if (err < 0)
5b4c6e38 7050 goto err2;
e5009240
PNA		 7051 } else {
7052 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
7053 }
7054
dfc46034
PBG		 7055 if (type->select_ops) {
7056 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
7057 if (IS_ERR(ops)) {
7058 err = PTR_ERR(ops);
5b4c6e38 7059 goto err2;
dfc46034
PBG		 7060 }
7061 } else {
7062 ops = type->ops;
7063 }
7064
e5009240 7065 err = -ENOMEM;
33758c89 7066 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 7067 if (!obj)
7068 goto err2;
e5009240 7069
dfc46034 7070 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 7071 if (err < 0)
5b4c6e38 7072 goto err3;
e5009240 7073
dfc46034
PBG		 7074 obj->ops = ops;
7075
5b4c6e38 7076 kfree(tb);
e5009240 7077 return obj;
5b4c6e38 7078err3:
e5009240 7079 kfree(obj);
5b4c6e38
GS		 7080err2:
7081 kfree(tb);
e5009240
PNA		 7082err1:
7083 return ERR_PTR(err);
7084}
7085
7086static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 7087 struct nft_object *obj, bool reset)
e5009240
PNA		 7088{
7089 struct nlattr *nest;
7090
ae0be8de 7091 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 7092 if (!nest)
7093 goto nla_put_failure;
dfc46034 7094 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 7095 goto nla_put_failure;
7096 nla_nest_end(skb, nest);
7097 return 0;
7098
7099nla_put_failure:
7100 return -1;
7101}
7102
7103static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
7104{
7105 const struct nft_object_type *type;
7106
7107 list_for_each_entry(type, &nf_tables_objects, list) {
7108 if (objtype == type->type)
7109 return type;
7110 }
7111 return NULL;
7112}
7113
452238e8
FW		 7114static const struct nft_object_type *
7115nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 7116{
7117 const struct nft_object_type *type;
7118
7119 type = __nft_obj_type_get(objtype);
7120 if (type != NULL && try_module_get(type->owner))
7121 return type;
7122
f102d66b 7123 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 7124#ifdef CONFIG_MODULES
7125 if (type == NULL) {
eb014de4 7126 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 7127 return ERR_PTR(-EAGAIN);
7128 }
7129#endif
7130 return ERR_PTR(-ENOENT);
7131}
7132
d62d0ba9
FFM		 7133static int nf_tables_updobj(const struct nft_ctx *ctx,
7134 const struct nft_object_type *type,
7135 const struct nlattr *attr,
7136 struct nft_object *obj)
7137{
7138 struct nft_object *newobj;
7139 struct nft_trans *trans;
dad3bdee
FW		 7140 int err = -ENOMEM;
7141
7142 if (!try_module_get(type->owner))
7143 return -ENOENT;
d62d0ba9
FFM		 7144
7145 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
7146 sizeof(struct nft_trans_obj));
7147 if (!trans)
dad3bdee 7148 goto err_trans;
d62d0ba9
FFM		 7149
7150 newobj = nft_obj_init(ctx, type, attr);
7151 if (IS_ERR(newobj)) {
7152 err = PTR_ERR(newobj);
b74ae961 7153 goto err_free_trans;
d62d0ba9
FFM		 7154 }
7155
7156 nft_trans_obj(trans) = obj;
7157 nft_trans_obj_update(trans) = true;
7158 nft_trans_obj_newobj(trans) = newobj;
0854db2a 7159 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 7160
7161 return 0;
b74ae961
DC		 7162
7163err_free_trans:
d62d0ba9 7164 kfree(trans);
dad3bdee
FW		 7165err_trans:
7166 module_put(type->owner);
d62d0ba9
FFM		 7167 return err;
7168}
7169
7dab8ee3
PNA		 7170static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
7171 const struct nlattr * const nla[])
e5009240 7172{
7dab8ee3
PNA		 7173 struct netlink_ext_ack *extack = info->extack;
7174 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7175 u8 family = info->nfmsg->nfgen_family;
e5009240 7176 const struct nft_object_type *type;
7dab8ee3 7177 struct net *net = info->net;
e5009240
PNA		 7178 struct nft_table *table;
7179 struct nft_object *obj;
7180 struct nft_ctx ctx;
7181 u32 objtype;
7182 int err;
7183
7184 if (!nla[NFTA_OBJ_TYPE] ||
7185 !nla[NFTA_OBJ_NAME] ||
7186 !nla[NFTA_OBJ_DATA])
7187 return -EINVAL;
7188
6001a930
PNA		 7189 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7190 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7191 if (IS_ERR(table)) {
7192 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7193 return PTR_ERR(table);
36dd1bcc 7194 }
e5009240
PNA		 7195
7196 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7197 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 7198 if (IS_ERR(obj)) {
7199 err = PTR_ERR(obj);
36dd1bcc
PNA		 7200 if (err != -ENOENT) {
7201 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7202 return err;
36dd1bcc 7203 }
1a28ad74 7204 } else {
7dab8ee3 7205 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7206 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7207 return -EEXIST;
36dd1bcc 7208 }
7dab8ee3 7209 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 7210 return -EOPNOTSUPP;
7211
fd57d0cb 7212 type = __nft_obj_type_get(objtype);
dac7f50a
AT		 7213 if (WARN_ON_ONCE(!type))
7214 return -ENOENT;
7215
7dab8ee3 7216 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 7217
7218 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 7219 }
7220
7dab8ee3 7221 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 7222
452238e8 7223 type = nft_obj_type_get(net, objtype);
e5009240
PNA		 7224 if (IS_ERR(type))
7225 return PTR_ERR(type);
7226
84fba055 7227 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 7228 if (IS_ERR(obj)) {
7229 err = PTR_ERR(obj);
b131c964 7230 goto err_init;
e5009240 7231 }
d152159b 7232 obj->key.table = table;
3ecbfd65
HS		 7233 obj->handle = nf_tables_alloc_handle(table);
7234
33758c89 7235 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 7236 if (!obj->key.name) {
61509575 7237 err = -ENOMEM;
b131c964
JGG		 7238 goto err_strdup;
7239 }
7240
7241 if (nla[NFTA_OBJ_USERDATA]) {
af0acf22 7242 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
b131c964
JGG		 7243 if (obj->udata == NULL)
7244 goto err_userdata;
7245
85db827a 7246 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 7247 }
e5009240
PNA		 7248
7249 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
7250 if (err < 0)
b131c964 7251 goto err_trans;
e5009240 7252
4d44175a
FW		 7253 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
7254 nft_objname_ht_params);
7255 if (err < 0)
b131c964 7256 goto err_obj_ht;
4d44175a 7257
e5009240
PNA		 7258 list_add_tail_rcu(&obj->list, &table->objects);
7259 table->use++;
7260 return 0;
b131c964 7261err_obj_ht:
4d44175a
FW		 7262 /* queued in transaction log */
7263 INIT_LIST_HEAD(&obj->list);
7264 return err;
b131c964 7265err_trans:
b131c964 7266 kfree(obj->udata);
85dfd816
PNA		 7267err_userdata:
7268 kfree(obj->key.name);
b131c964 7269err_strdup:
dfc46034 7270 if (obj->ops->destroy)
00bfb320 7271 obj->ops->destroy(&ctx, obj);
e5009240 7272 kfree(obj);
b131c964 7273err_init:
e5009240
PNA		 7274 module_put(type->owner);
7275 return err;
7276}
7277
7278static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
7279 u32 portid, u32 seq, int event, u32 flags,
7280 int family, const struct nft_table *table,
43da04a5 7281 struct nft_object *obj, bool reset)
e5009240 7282{
e5009240
PNA		 7283 struct nlmsghdr *nlh;
7284
dedb67c4 7285 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7286 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7287 NFNETLINK_V0, nft_base_seq(net));
7288 if (!nlh)
e5009240
PNA		 7289 goto nla_put_failure;
7290
e5009240 7291 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 7292 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
3ecbfd65
HS		 7293 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7294 NFTA_OBJ_PAD))
e5009240
PNA		 7295 goto nla_put_failure;
7296
28339b21
PNA		 7297 if (event == NFT_MSG_DELOBJ) {
7298 nlmsg_end(skb, nlh);
7299 return 0;
7300 }
7301
7302 if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
7303 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
7304 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
7305 goto nla_put_failure;
7306
b131c964
JGG		 7307 if (obj->udata &&
7308 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7309 goto nla_put_failure;
7310
e5009240
PNA		 7311 nlmsg_end(skb, nlh);
7312 return 0;
7313
7314nla_put_failure:
7315 nlmsg_trim(skb, nlh);
7316 return -1;
7317}
7318
a9fea2a3 7319struct nft_obj_filter {
e46abbcc 7320 char *table;
a9fea2a3
PNA		 7321 u32 type;
7322};
7323
e5009240
PNA		 7324static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7325{
7326 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
e5009240 7327 const struct nft_table *table;
e5009240 7328 unsigned int idx = 0, s_idx = cb->args[0];
a9fea2a3 7329 struct nft_obj_filter *filter = cb->data;
e5009240
PNA		 7330 struct net *net = sock_net(skb->sk);
7331 int family = nfmsg->nfgen_family;
0854db2a 7332 struct nftables_pernet *nft_net;
43da04a5
PNA		 7333 struct nft_object *obj;
7334 bool reset = false;
7335
7336 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7337 reset = true;
e5009240
PNA		 7338
7339 rcu_read_lock();
d59d2f82 7340 nft_net = nft_pernet(net);
34002783 7341 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 7342
0854db2a 7343 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7344 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 7345 continue;
7346
36596dad
PNA		 7347 list_for_each_entry_rcu(obj, &table->objects, list) {
7348 if (!nft_is_active(net, obj))
7349 goto cont;
7350 if (idx < s_idx)
7351 goto cont;
7352 if (idx > s_idx)
7353 memset(&cb->args[1], 0,
7354 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7355 if (filter && filter->table &&
36596dad
PNA		 7356 strcmp(filter->table, table->name))
7357 goto cont;
7358 if (filter &&
7359 filter->type != NFT_OBJECT_UNSPEC &&
7360 obj->ops->type->type != filter->type)
7361 goto cont;
8e6cf365 7362 if (reset) {
68df2ed5 7363 char *buf = kasprintf(GFP_ATOMIC,
c520292f 7364 "%s:%u",
8e6cf365 7365 table->name,
0854db2a 7366 nft_net->base_seq);
8e6cf365
RGB		 7367
7368 audit_log_nfcfg(buf,
7369 family,
7370 obj->handle,
14224039 7371 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7372 GFP_ATOMIC);
8e6cf365
RGB		 7373 kfree(buf);
7374 }
7375
36596dad
PNA		 7376 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7377 cb->nlh->nlmsg_seq,
7378 NFT_MSG_NEWOBJ,
7379 NLM_F_MULTI | NLM_F_APPEND,
98319cb9 7380 table->family, table,
36596dad
PNA		 7381 obj, reset) < 0)
7382 goto done;
e5009240 7383
36596dad 7384 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7385cont:
36596dad 7386 idx++;
e5009240
PNA		 7387 }
7388 }
7389done:
7390 rcu_read_unlock();
7391
7392 cb->args[0] = idx;
7393 return skb->len;
7394}
7395
90fd131a 7396static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7397{
90fd131a
FW		 7398 const struct nlattr * const *nla = cb->data;
7399 struct nft_obj_filter *filter = NULL;
e46abbcc 7400
90fd131a
FW		 7401 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7402 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7403 if (!filter)
7404 return -ENOMEM;
7405
7406 if (nla[NFTA_OBJ_TABLE]) {
7407 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7408 if (!filter->table) {
7409 kfree(filter);
7410 return -ENOMEM;
7411 }
7412 }
7413
7414 if (nla[NFTA_OBJ_TYPE])
7415 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
8bea728d 7416 }
a9fea2a3 7417
90fd131a 7418 cb->data = filter;
a9fea2a3
PNA		 7419 return 0;
7420}
7421
90fd131a 7422static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7423{
90fd131a 7424 struct nft_obj_filter *filter = cb->data;
a9fea2a3 7425
90fd131a
FW		 7426 if (filter) {
7427 kfree(filter->table);
7428 kfree(filter);
e46abbcc 7429 }
a9fea2a3 7430
90fd131a 7431 return 0;
a9fea2a3
PNA		 7432}
7433
d9adf22a 7434/* called with rcu_read_lock held */
797d4980
PNA		 7435static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7436 const struct nlattr * const nla[])
e5009240 7437{
797d4980
PNA		 7438 struct netlink_ext_ack *extack = info->extack;
7439 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7440 u8 family = info->nfmsg->nfgen_family;
e5009240 7441 const struct nft_table *table;
797d4980 7442 struct net *net = info->net;
e5009240
PNA		 7443 struct nft_object *obj;
7444 struct sk_buff *skb2;
43da04a5 7445 bool reset = false;
e5009240
PNA		 7446 u32 objtype;
7447 int err;
7448
797d4980 7449 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7450 struct netlink_dump_control c = {
90fd131a 7451 .start = nf_tables_dump_obj_start,
e5009240 7452 .dump = nf_tables_dump_obj,
a9fea2a3 7453 .done = nf_tables_dump_obj_done,
d9adf22a 7454 .module = THIS_MODULE,
90fd131a 7455 .data = (void *)nla,
e5009240 7456 };
a9fea2a3 7457
797d4980 7458 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7459 }
7460
7461 if (!nla[NFTA_OBJ_NAME] ||
7462 !nla[NFTA_OBJ_TYPE])
7463 return -EINVAL;
7464
6001a930 7465 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7466 if (IS_ERR(table)) {
7467 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7468 return PTR_ERR(table);
36dd1bcc 7469 }
e5009240
PNA		 7470
7471 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7472 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7473 if (IS_ERR(obj)) {
7474 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7475 return PTR_ERR(obj);
36dd1bcc 7476 }
e5009240 7477
d9adf22a 7478 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7479 if (!skb2)
7480 return -ENOMEM;
7481
797d4980 7482 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7483 reset = true;
7484
8e6cf365 7485 if (reset) {
0854db2a
FW		 7486 const struct nftables_pernet *nft_net;
7487 char *buf;
7488
d59d2f82 7489 nft_net = nft_pernet(net);
0854db2a 7490 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7491
7492 audit_log_nfcfg(buf,
7493 family,
7494 obj->handle,
14224039 7495 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7496 GFP_ATOMIC);
8e6cf365
RGB		 7497 kfree(buf);
7498 }
7499
e5009240 7500 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7501 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7502 family, table, obj, reset);
e5009240 7503 if (err < 0)
ee921183 7504 goto err_fill_obj_info;
e5009240 7505
ee921183
PNA		 7506 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7507
7508err_fill_obj_info:
e5009240
PNA		 7509 kfree_skb(skb2);
7510 return err;
e5009240
PNA		 7511}
7512
00bfb320 7513static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7514{
dfc46034 7515 if (obj->ops->destroy)
00bfb320 7516 obj->ops->destroy(ctx, obj);
e5009240 7517
dfc46034 7518 module_put(obj->ops->type->owner);
d152159b 7519 kfree(obj->key.name);
bc7a7082 7520 kfree(obj->udata);
e5009240
PNA		 7521 kfree(obj);
7522}
7523
7dab8ee3
PNA		 7524static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7525 const struct nlattr * const nla[])
e5009240 7526{
7dab8ee3
PNA		 7527 struct netlink_ext_ack *extack = info->extack;
7528 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7529 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7530 struct net *net = info->net;
36dd1bcc 7531 const struct nlattr *attr;
e5009240
PNA		 7532 struct nft_table *table;
7533 struct nft_object *obj;
7534 struct nft_ctx ctx;
7535 u32 objtype;
7536
7537 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7538 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7539 return -EINVAL;
7540
6001a930
PNA		 7541 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7542 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7543 if (IS_ERR(table)) {
7544 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7545 return PTR_ERR(table);
36dd1bcc 7546 }
e5009240
PNA		 7547
7548 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7549 if (nla[NFTA_OBJ_HANDLE]) {
7550 attr = nla[NFTA_OBJ_HANDLE];
7551 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7552 } else {
7553 attr = nla[NFTA_OBJ_NAME];
4d44175a 7554 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7555 }
7556
7557 if (IS_ERR(obj)) {
f80a612d
FFM		 7558 if (PTR_ERR(obj) == -ENOENT &&
7559 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
7560 return 0;
7561
36dd1bcc 7562 NL_SET_BAD_ATTR(extack, attr);
e5009240 7563 return PTR_ERR(obj);
36dd1bcc
PNA		 7564 }
7565 if (obj->use > 0) {
7566 NL_SET_BAD_ATTR(extack, attr);
e5009240 7567 return -EBUSY;
36dd1bcc 7568 }
e5009240 7569
7dab8ee3 7570 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7571
7572 return nft_delobj(&ctx, obj);
7573}
7574
d152159b 7575void nft_obj_notify(struct net *net, const struct nft_table *table,
25e94a99 7576 struct nft_object *obj, u32 portid, u32 seq, int event,
6fb721cf 7577 u16 flags, int family, int report, gfp_t gfp)
e5009240 7578{
d59d2f82 7579 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7580 struct sk_buff *skb;
7581 int err;
c520292f 7582 char *buf = kasprintf(gfp, "%s:%u",
0854db2a 7583 table->name, nft_net->base_seq);
8e6cf365
RGB		 7584
7585 audit_log_nfcfg(buf,
7586 family,
7587 obj->handle,
7588 event == NFT_MSG_NEWOBJ ?
c520292f
RGB		 7589 AUDIT_NFT_OP_OBJ_REGISTER :
7590 AUDIT_NFT_OP_OBJ_UNREGISTER,
68df2ed5 7591 gfp);
8e6cf365 7592 kfree(buf);
e5009240 7593
2599e989
PNA		 7594 if (!report &&
7595 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7596 return;
e5009240 7597
2599e989 7598 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7599 if (skb == NULL)
7600 goto err;
7601
6fb721cf
PNA		 7602 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7603 flags & (NLM_F_CREATE | NLM_F_EXCL),
7604 family, table, obj, false);
e5009240
PNA		 7605 if (err < 0) {
7606 kfree_skb(skb);
7607 goto err;
7608 }
7609
0854db2a 7610 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7611 return;
e5009240 7612err:
25e94a99 7613 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7614}
2599e989
PNA		 7615EXPORT_SYMBOL_GPL(nft_obj_notify);
7616
25e94a99
PNA		 7617static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7618 struct nft_object *obj, int event)
2599e989 7619{
25e94a99 7620 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
6fb721cf 7621 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
2599e989 7622}
e5009240 7623
3b49e2e9
PNA		 7624/*
7625 * Flow tables
7626 */
7627void nft_register_flowtable_type(struct nf_flowtable_type *type)
7628{
7629 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7630 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7631 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7632}
7633EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7634
7635void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7636{
7637 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7638 list_del_rcu(&type->list);
7639 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7640}
7641EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7642
7643static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7644 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7645 .len = NFT_NAME_MAXLEN - 1 },
7646 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7647 .len = NFT_NAME_MAXLEN - 1 },
7648 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 7649 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 7650 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 7651};
7652
cac20fcd
PNA		 7653struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7654 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 7655{
7656 struct nft_flowtable *flowtable;
7657
d9adf22a 7658 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 7659 if (!nla_strcmp(nla, flowtable->name) &&
7660 nft_active_genmask(flowtable, genmask))
7661 return flowtable;
7662 }
7663 return ERR_PTR(-ENOENT);
7664}
cac20fcd 7665EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 7666
9b05b6e1
LGL		 7667void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7668 struct nft_flowtable *flowtable,
7669 enum nft_trans_phase phase)
7670{
7671 switch (phase) {
7672 case NFT_TRANS_PREPARE:
7673 case NFT_TRANS_ABORT:
7674 case NFT_TRANS_RELEASE:
7675 flowtable->use--;
954d8297 7676 fallthrough;
9b05b6e1
LGL		 7677 default:
7678 return;
7679 }
7680}
7681EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7682
ae0662f8 7683static struct nft_flowtable *
cac20fcd
PNA		 7684nft_flowtable_lookup_byhandle(const struct nft_table *table,
7685 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 7686{
7687 struct nft_flowtable *flowtable;
7688
7689 list_for_each_entry(flowtable, &table->flowtables, list) {
7690 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7691 nft_active_genmask(flowtable, genmask))
7692 return flowtable;
7693 }
7694 return ERR_PTR(-ENOENT);
7695}
7696
d9246a53
PNA		 7697struct nft_flowtable_hook {
7698 u32 num;
7699 int priority;
7700 struct list_head list;
7701};
7702
3b49e2e9
PNA		 7703static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7704 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7705 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7706 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7707};
7708
d9246a53 7709static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
8509f62b 7710 const struct nlattr * const nla[],
d9246a53 7711 struct nft_flowtable_hook *flowtable_hook,
c3c060ad
PNA		 7712 struct nft_flowtable *flowtable,
7713 struct netlink_ext_ack *extack, bool add)
3b49e2e9 7714{
3b49e2e9 7715 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 7716 struct nft_hook *hook;
3b49e2e9 7717 int hooknum, priority;
3f0465a9 7718 int err;
3b49e2e9 7719
d9246a53
PNA		 7720 INIT_LIST_HEAD(&flowtable_hook->list);
7721
8509f62b
PNA		 7722 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX,
7723 nla[NFTA_FLOWTABLE_HOOK],
8cb08174 7724 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 7725 if (err < 0)
7726 return err;
7727
5b6743fb
PNA		 7728 if (add) {
7729 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
8509f62b
PNA		 7730 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7731 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
7732 return -ENOENT;
7733 }
3b49e2e9 7734
5b6743fb
PNA		 7735 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7736 if (hooknum != NF_NETDEV_INGRESS)
7737 return -EOPNOTSUPP;
7738
7739 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7740
7741 flowtable_hook->priority = priority;
7742 flowtable_hook->num = hooknum;
7743 } else {
7744 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7745 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7746 if (hooknum != flowtable->hooknum)
7747 return -EOPNOTSUPP;
7748 }
7749
7750 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7751 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7752 if (priority != flowtable->data.priority)
7753 return -EOPNOTSUPP;
7754 }
3b49e2e9 7755
5b6743fb
PNA		 7756 flowtable_hook->priority = flowtable->data.priority;
7757 flowtable_hook->num = flowtable->hooknum;
7758 }
3b49e2e9 7759
05abe445
PNA		 7760 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7761 err = nf_tables_parse_netdev_hooks(ctx->net,
7762 tb[NFTA_FLOWTABLE_HOOK_DEVS],
c3c060ad
PNA		 7763 &flowtable_hook->list,
7764 extack);
05abe445
PNA		 7765 if (err < 0)
7766 return err;
7767 }
3b49e2e9 7768
d9246a53 7769 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 7770 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 7771 hook->ops.hooknum = flowtable_hook->num;
7772 hook->ops.priority = flowtable_hook->priority;
7773 hook->ops.priv = &flowtable->data;
7774 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 7775 }
7776
3b49e2e9
PNA		 7777 return err;
7778}
7779
98319cb9 7780static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 7781{
7782 const struct nf_flowtable_type *type;
7783
7784 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 7785 if (family == type->family)
3b49e2e9
PNA		 7786 return type;
7787 }
7788 return NULL;
7789}
7790
452238e8
FW		 7791static const struct nf_flowtable_type *
7792nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 7793{
7794 const struct nf_flowtable_type *type;
7795
98319cb9 7796 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 7797 if (type != NULL && try_module_get(type->owner))
7798 return type;
7799
f102d66b 7800 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 7801#ifdef CONFIG_MODULES
7802 if (type == NULL) {
eb014de4 7803 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 7804 return ERR_PTR(-EAGAIN);
7805 }
7806#endif
7807 return ERR_PTR(-ENOENT);
7808}
7809
5acab914 7810/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 7811static void nft_unregister_flowtable_hook(struct net *net,
7812 struct nft_flowtable *flowtable,
7813 struct nft_hook *hook)
7814{
7815 nf_unregister_net_hook(net, &hook->ops);
7816 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7817 FLOW_BLOCK_UNBIND);
7818}
7819
f9a43007
PNA		 7820static void __nft_unregister_flowtable_net_hooks(struct net *net,
7821 struct list_head *hook_list,
7822 bool release_netdev)
3b49e2e9 7823{
f9a43007 7824 struct nft_hook *hook, *next;
3b49e2e9 7825
f9a43007 7826 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 7827 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 7828 if (release_netdev) {
7829 list_del(&hook->list);
ab5e5c06 7830 kfree_rcu(hook, rcu);
f9a43007
PNA		 7831 }
7832 }
7833}
7834
7835static void nft_unregister_flowtable_net_hooks(struct net *net,
7836 struct list_head *hook_list)
7837{
7838 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 7839}
7840
7841static int nft_register_flowtable_net_hooks(struct net *net,
7842 struct nft_table *table,
f9382669 7843 struct list_head *hook_list,
3f0465a9
PNA		 7844 struct nft_flowtable *flowtable)
7845{
7846 struct nft_hook *hook, *hook2, *next;
7847 struct nft_flowtable *ft;
7848 int err, i = 0;
7849
f9382669 7850 list_for_each_entry(hook, hook_list, list) {
3f0465a9 7851 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 7852 if (!nft_is_active_next(net, ft))
7853 continue;
7854
3f0465a9
PNA		 7855 list_for_each_entry(hook2, &ft->hook_list, list) {
7856 if (hook->ops.dev == hook2->ops.dev &&
7857 hook->ops.pf == hook2->ops.pf) {
77a92189 7858 err = -EEXIST;
3f0465a9
PNA		 7859 goto err_unregister_net_hooks;
7860 }
7861 }
7862 }
3b49e2e9 7863
d7c03a9f 7864 err = flowtable->data.type->setup(&flowtable->data,
7865 hook->ops.dev,
7866 FLOW_BLOCK_BIND);
3f0465a9
PNA		 7867 if (err < 0)
7868 goto err_unregister_net_hooks;
7869
d7c03a9f 7870 err = nf_register_net_hook(net, &hook->ops);
7871 if (err < 0) {
7872 flowtable->data.type->setup(&flowtable->data,
7873 hook->ops.dev,
7874 FLOW_BLOCK_UNBIND);
7875 goto err_unregister_net_hooks;
7876 }
7877
3f0465a9 7878 i++;
3b49e2e9 7879 }
3f0465a9
PNA		 7880
7881 return 0;
7882
7883err_unregister_net_hooks:
f9382669 7884 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 7885 if (i-- <= 0)
7886 break;
7887
ff4bf2f4 7888 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7889 list_del_rcu(&hook->list);
7890 kfree_rcu(hook, rcu);
7891 }
7892
7893 return err;
3b49e2e9
PNA		 7894}
7895
cdc32546 7896static void nft_hooks_destroy(struct list_head *hook_list)
389a2cbc
PNA		 7897{
7898 struct nft_hook *hook, *next;
7899
7900 list_for_each_entry_safe(hook, next, hook_list, list) {
7901 list_del_rcu(&hook->list);
7902 kfree_rcu(hook, rcu);
7903 }
7904}
7905
78d9f48f 7906static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
c3c060ad
PNA		 7907 struct nft_flowtable *flowtable,
7908 struct netlink_ext_ack *extack)
78d9f48f
PNA		 7909{
7910 const struct nlattr * const *nla = ctx->nla;
7911 struct nft_flowtable_hook flowtable_hook;
7912 struct nft_hook *hook, *next;
7913 struct nft_trans *trans;
7914 bool unregister = false;
7b35582c 7915 u32 flags;
78d9f48f
PNA		 7916 int err;
7917
8509f62b
PNA		 7918 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
7919 extack, false);
78d9f48f
PNA		 7920 if (err < 0)
7921 return err;
7922
7923 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7924 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
7925 list_del(&hook->list);
7926 kfree(hook);
7927 }
7928 }
7929
7b35582c
PNA		 7930 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7931 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 7932 if (flags & ~NFT_FLOWTABLE_MASK) {
7933 err = -EOPNOTSUPP;
7934 goto err_flowtable_update_hook;
7935 }
7b35582c 7936 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 7937 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
7938 err = -EOPNOTSUPP;
7939 goto err_flowtable_update_hook;
7940 }
7b35582c
PNA		 7941 } else {
7942 flags = flowtable->data.flags;
7943 }
7944
78d9f48f
PNA		 7945 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
7946 &flowtable_hook.list, flowtable);
7947 if (err < 0)
7948 goto err_flowtable_update_hook;
7949
7950 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
7951 sizeof(struct nft_trans_flowtable));
7952 if (!trans) {
7953 unregister = true;
7954 err = -ENOMEM;
7955 goto err_flowtable_update_hook;
7956 }
7957
7b35582c 7958 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 7959 nft_trans_flowtable(trans) = flowtable;
7960 nft_trans_flowtable_update(trans) = true;
7961 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7962 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
7963
0854db2a 7964 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 7965
7966 return 0;
7967
7968err_flowtable_update_hook:
7969 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7970 if (unregister)
7971 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
7972 list_del_rcu(&hook->list);
7973 kfree_rcu(hook, rcu);
7974 }
7975
7976 return err;
7977
7978}
7979
7dab8ee3
PNA		 7980static int nf_tables_newflowtable(struct sk_buff *skb,
7981 const struct nfnl_info *info,
7982 const struct nlattr * const nla[])
3b49e2e9 7983{
7dab8ee3 7984 struct netlink_ext_ack *extack = info->extack;
d9246a53 7985 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 7986 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7987 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7988 const struct nf_flowtable_type *type;
3f0465a9
PNA		 7989 struct nft_flowtable *flowtable;
7990 struct nft_hook *hook, *next;
7dab8ee3 7991 struct net *net = info->net;
3b49e2e9
PNA		 7992 struct nft_table *table;
7993 struct nft_ctx ctx;
3f0465a9 7994 int err;
3b49e2e9
PNA		 7995
7996 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7997 !nla[NFTA_FLOWTABLE_NAME] ||
7998 !nla[NFTA_FLOWTABLE_HOOK])
7999 return -EINVAL;
8000
cac20fcd 8001 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8002 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8003 if (IS_ERR(table)) {
8004 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8005 return PTR_ERR(table);
36dd1bcc 8006 }
3b49e2e9 8007
cac20fcd
PNA		 8008 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8009 genmask);
3b49e2e9
PNA		 8010 if (IS_ERR(flowtable)) {
8011 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 8012 if (err != -ENOENT) {
8013 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8014 return err;
36dd1bcc 8015 }
3b49e2e9 8016 } else {
7dab8ee3 8017 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 8018 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 8019 return -EEXIST;
36dd1bcc 8020 }
3b49e2e9 8021
7dab8ee3 8022 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 8023
c3c060ad 8024 return nft_flowtable_update(&ctx, info->nlh, flowtable, extack);
3b49e2e9
PNA		 8025 }
8026
7dab8ee3 8027 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 8028
33758c89 8029 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 8030 if (!flowtable)
8031 return -ENOMEM;
8032
8033 flowtable->table = table;
3ecbfd65 8034 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 8035 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 8036
33758c89 8037 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 8038 if (!flowtable->name) {
8039 err = -ENOMEM;
8040 goto err1;
8041 }
8042
452238e8 8043 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 8044 if (IS_ERR(type)) {
8045 err = PTR_ERR(type);
8046 goto err2;
8047 }
8048
8bb69f3b
PNA		 8049 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8050 flowtable->data.flags =
8051 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 8052 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
8053 err = -EOPNOTSUPP;
8bb69f3b 8054 goto err3;
7e6136f1 8055 }
8bb69f3b
PNA		 8056 }
8057
8058 write_pnet(&flowtable->data.net, net);
3b49e2e9 8059 flowtable->data.type = type;
a268de77 8060 err = type->init(&flowtable->data);
3b49e2e9
PNA		 8061 if (err < 0)
8062 goto err3;
8063
8509f62b
PNA		 8064 err = nft_flowtable_parse_hook(&ctx, nla, &flowtable_hook, flowtable,
8065 extack, true);
3b49e2e9 8066 if (err < 0)
a268de77 8067 goto err4;
3b49e2e9 8068
d9246a53
PNA		 8069 list_splice(&flowtable_hook.list, &flowtable->hook_list);
8070 flowtable->data.priority = flowtable_hook.priority;
8071 flowtable->hooknum = flowtable_hook.num;
8072
f9382669
PNA		 8073 err = nft_register_flowtable_net_hooks(ctx.net, table,
8074 &flowtable->hook_list,
8075 flowtable);
2d285f26 8076 if (err < 0) {
cdc32546 8077 nft_hooks_destroy(&flowtable->hook_list);
3f0465a9 8078 goto err4;
2d285f26 8079 }
3b49e2e9
PNA		 8080
8081 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
8082 if (err < 0)
3f0465a9 8083 goto err5;
3b49e2e9
PNA		 8084
8085 list_add_tail_rcu(&flowtable->list, &table->flowtables);
8086 table->use++;
8087
8088 return 0;
a268de77 8089err5:
3f0465a9 8090 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 8091 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 8092 list_del_rcu(&hook->list);
8093 kfree_rcu(hook, rcu);
8094 }
a268de77
FF		 8095err4:
8096 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 8097err3:
8098 module_put(type->owner);
8099err2:
8100 kfree(flowtable->name);
8101err1:
8102 kfree(flowtable);
8103 return err;
8104}
8105
3003055f
PNA		 8106static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
8107{
8108 struct nft_hook *this, *next;
8109
8110 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
8111 list_del(&this->list);
8112 kfree(this);
8113 }
8114}
8115
abadb2f8 8116static int nft_delflowtable_hook(struct nft_ctx *ctx,
c3c060ad
PNA		 8117 struct nft_flowtable *flowtable,
8118 struct netlink_ext_ack *extack)
abadb2f8
PNA		 8119{
8120 const struct nlattr * const *nla = ctx->nla;
8121 struct nft_flowtable_hook flowtable_hook;
b6d9014a 8122 LIST_HEAD(flowtable_del_list);
3003055f 8123 struct nft_hook *this, *hook;
abadb2f8
PNA		 8124 struct nft_trans *trans;
8125 int err;
8126
8509f62b
PNA		 8127 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8128 extack, false);
abadb2f8
PNA		 8129 if (err < 0)
8130 return err;
8131
3003055f 8132 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 8133 hook = nft_hook_list_find(&flowtable->hook_list, this);
8134 if (!hook) {
8135 err = -ENOENT;
8136 goto err_flowtable_del_hook;
8137 }
b6d9014a 8138 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 8139 }
8140
8141 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
8142 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 8143 if (!trans) {
8144 err = -ENOMEM;
8145 goto err_flowtable_del_hook;
8146 }
abadb2f8
PNA		 8147
8148 nft_trans_flowtable(trans) = flowtable;
8149 nft_trans_flowtable_update(trans) = true;
8150 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 8151 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 8152 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 8153
0854db2a 8154 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 8155
8156 return 0;
8157
8158err_flowtable_del_hook:
b6d9014a 8159 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 8160 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 8161
8162 return err;
8163}
8164
7dab8ee3
PNA		 8165static int nf_tables_delflowtable(struct sk_buff *skb,
8166 const struct nfnl_info *info,
8167 const struct nlattr * const nla[])
3b49e2e9 8168{
7dab8ee3
PNA		 8169 struct netlink_ext_ack *extack = info->extack;
8170 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 8171 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8172 struct nft_flowtable *flowtable;
7dab8ee3 8173 struct net *net = info->net;
36dd1bcc 8174 const struct nlattr *attr;
3b49e2e9
PNA		 8175 struct nft_table *table;
8176 struct nft_ctx ctx;
8177
e603ea4b
PNA		 8178 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8179 (!nla[NFTA_FLOWTABLE_NAME] &&
8180 !nla[NFTA_FLOWTABLE_HANDLE]))
8181 return -EINVAL;
8182
cac20fcd 8183 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8184 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 8185 if (IS_ERR(table)) {
8186 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 8187 return PTR_ERR(table);
36dd1bcc 8188 }
3b49e2e9 8189
36dd1bcc
PNA		 8190 if (nla[NFTA_FLOWTABLE_HANDLE]) {
8191 attr = nla[NFTA_FLOWTABLE_HANDLE];
8192 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
8193 } else {
8194 attr = nla[NFTA_FLOWTABLE_NAME];
8195 flowtable = nft_flowtable_lookup(table, attr, genmask);
8196 }
8197
8198 if (IS_ERR(flowtable)) {
f80a612d
FFM		 8199 if (PTR_ERR(flowtable) == -ENOENT &&
8200 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
8201 return 0;
8202
36dd1bcc
PNA		 8203 NL_SET_BAD_ATTR(extack, attr);
8204 return PTR_ERR(flowtable);
8205 }
abadb2f8 8206
7dab8ee3 8207 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 8208
8209 if (nla[NFTA_FLOWTABLE_HOOK])
c3c060ad 8210 return nft_delflowtable_hook(&ctx, flowtable, extack);
abadb2f8 8211
36dd1bcc
PNA		 8212 if (flowtable->use > 0) {
8213 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 8214 return -EBUSY;
36dd1bcc 8215 }
3b49e2e9 8216
3b49e2e9
PNA		 8217 return nft_delflowtable(&ctx, flowtable);
8218}
8219
8220static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
8221 u32 portid, u32 seq, int event,
8222 u32 flags, int family,
c42d8bda
PNA		 8223 struct nft_flowtable *flowtable,
8224 struct list_head *hook_list)
3b49e2e9
PNA		 8225{
8226 struct nlattr *nest, *nest_devs;
3f0465a9 8227 struct nft_hook *hook;
3b49e2e9 8228 struct nlmsghdr *nlh;
3b49e2e9
PNA		 8229
8230 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 8231 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
8232 NFNETLINK_V0, nft_base_seq(net));
8233 if (!nlh)
3b49e2e9
PNA		 8234 goto nla_put_failure;
8235
3b49e2e9
PNA		 8236 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
8237 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65 8238 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
28339b21
PNA		 8239 NFTA_FLOWTABLE_PAD))
8240 goto nla_put_failure;
8241
8242 if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
8243 nlmsg_end(skb, nlh);
8244 return 0;
8245 }
8246
8247 if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
8bb69f3b 8248 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 8249 goto nla_put_failure;
8250
ae0be8de 8251 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 8252 if (!nest)
8253 goto nla_put_failure;
3b49e2e9 8254 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 8255 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 8256 goto nla_put_failure;
8257
ae0be8de 8258 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 8259 if (!nest_devs)
8260 goto nla_put_failure;
8261
28339b21
PNA		 8262 if (!hook_list)
8263 hook_list = &flowtable->hook_list;
8264
c42d8bda 8265 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 8266 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 8267 goto nla_put_failure;
8268 }
8269 nla_nest_end(skb, nest_devs);
8270 nla_nest_end(skb, nest);
8271
8272 nlmsg_end(skb, nlh);
8273 return 0;
8274
8275nla_put_failure:
8276 nlmsg_trim(skb, nlh);
8277 return -1;
8278}
8279
8280struct nft_flowtable_filter {
8281 char *table;
8282};
8283
8284static int nf_tables_dump_flowtable(struct sk_buff *skb,
8285 struct netlink_callback *cb)
8286{
8287 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
8288 struct nft_flowtable_filter *filter = cb->data;
8289 unsigned int idx = 0, s_idx = cb->args[0];
8290 struct net *net = sock_net(skb->sk);
8291 int family = nfmsg->nfgen_family;
8292 struct nft_flowtable *flowtable;
0854db2a 8293 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 8294 const struct nft_table *table;
8295
8296 rcu_read_lock();
d59d2f82 8297 nft_net = nft_pernet(net);
34002783 8298 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 8299
0854db2a 8300 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 8301 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 8302 continue;
8303
36596dad
PNA		 8304 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8305 if (!nft_is_active(net, flowtable))
8306 goto cont;
8307 if (idx < s_idx)
8308 goto cont;
8309 if (idx > s_idx)
8310 memset(&cb->args[1], 0,
8311 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 8312 if (filter && filter->table &&
36596dad
PNA		 8313 strcmp(filter->table, table->name))
8314 goto cont;
3b49e2e9 8315
36596dad
PNA		 8316 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
8317 cb->nlh->nlmsg_seq,
8318 NFT_MSG_NEWFLOWTABLE,
8319 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda 8320 table->family,
28339b21 8321 flowtable, NULL) < 0)
36596dad 8322 goto done;
3b49e2e9 8323
36596dad 8324 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 8325cont:
36596dad 8326 idx++;
3b49e2e9
PNA		 8327 }
8328 }
8329done:
8330 rcu_read_unlock();
8331
8332 cb->args[0] = idx;
8333 return skb->len;
8334}
8335
90fd131a 8336static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 8337{
90fd131a
FW		 8338 const struct nlattr * const *nla = cb->data;
8339 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 8340
90fd131a
FW		 8341 if (nla[NFTA_FLOWTABLE_TABLE]) {
8342 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8343 if (!filter)
8344 return -ENOMEM;
3b49e2e9 8345
90fd131a
FW		 8346 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8347 GFP_ATOMIC);
8348 if (!filter->table) {
8349 kfree(filter);
8350 return -ENOMEM;
8351 }
8352 }
3b49e2e9 8353
90fd131a 8354 cb->data = filter;
3b49e2e9
PNA		 8355 return 0;
8356}
8357
90fd131a 8358static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 8359{
90fd131a 8360 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 8361
3b49e2e9 8362 if (!filter)
90fd131a 8363 return 0;
3b49e2e9 8364
90fd131a
FW		 8365 kfree(filter->table);
8366 kfree(filter);
8367
8368 return 0;
3b49e2e9
PNA		 8369}
8370
d9adf22a 8371/* called with rcu_read_lock held */
797d4980
PNA		 8372static int nf_tables_getflowtable(struct sk_buff *skb,
8373 const struct nfnl_info *info,
8374 const struct nlattr * const nla[])
3b49e2e9 8375{
797d4980 8376 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8377 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8378 struct nft_flowtable *flowtable;
3b49e2e9 8379 const struct nft_table *table;
797d4980 8380 struct net *net = info->net;
3b49e2e9
PNA		 8381 struct sk_buff *skb2;
8382 int err;
8383
797d4980 8384 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8385 struct netlink_dump_control c = {
90fd131a 8386 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8387 .dump = nf_tables_dump_flowtable,
8388 .done = nf_tables_dump_flowtable_done,
d9adf22a 8389 .module = THIS_MODULE,
90fd131a 8390 .data = (void *)nla,
3b49e2e9
PNA		 8391 };
8392
797d4980 8393 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8394 }
8395
8396 if (!nla[NFTA_FLOWTABLE_NAME])
8397 return -EINVAL;
8398
cac20fcd 8399 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8400 genmask, 0);
3b49e2e9
PNA		 8401 if (IS_ERR(table))
8402 return PTR_ERR(table);
8403
cac20fcd
PNA		 8404 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8405 genmask);
03a0120f 8406 if (IS_ERR(flowtable))
3b49e2e9
PNA		 8407 return PTR_ERR(flowtable);
8408
d9adf22a 8409 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8410 if (!skb2)
8411 return -ENOMEM;
8412
8413 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8414 info->nlh->nlmsg_seq,
3b49e2e9 8415 NFT_MSG_NEWFLOWTABLE, 0, family,
28339b21 8416 flowtable, NULL);
3b49e2e9 8417 if (err < 0)
ee921183 8418 goto err_fill_flowtable_info;
3b49e2e9 8419
ee921183
PNA		 8420 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8421
8422err_fill_flowtable_info:
3b49e2e9
PNA		 8423 kfree_skb(skb2);
8424 return err;
8425}
8426
8427static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8428 struct nft_flowtable *flowtable,
28339b21 8429 struct list_head *hook_list, int event)
3b49e2e9 8430{
d59d2f82 8431 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8432 struct sk_buff *skb;
6fb721cf 8433 u16 flags = 0;
3b49e2e9
PNA		 8434 int err;
8435
dceababa 8436 if (!ctx->report &&
3b49e2e9
PNA		 8437 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8438 return;
8439
8440 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8441 if (skb == NULL)
8442 goto err;
8443
6fb721cf
PNA		 8444 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8445 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8446
3b49e2e9 8447 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8448 ctx->seq, event, flags,
c42d8bda 8449 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8450 if (err < 0) {
8451 kfree_skb(skb);
8452 goto err;
8453 }
8454
0854db2a 8455 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8456 return;
8457err:
8458 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8459}
8460
3b49e2e9
PNA		 8461static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8462{
3f0465a9
PNA		 8463 struct nft_hook *hook, *next;
8464
5acab914 8465 flowtable->data.type->free(&flowtable->data);
3f0465a9 8466 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8467 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8468 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8469 list_del_rcu(&hook->list);
8470 kfree(hook);
8471 }
3b49e2e9 8472 kfree(flowtable->name);
3b49e2e9 8473 module_put(flowtable->data.type->owner);
a12486eb 8474 kfree(flowtable);
3b49e2e9
PNA		 8475}
8476
84d7fce6
PNA		 8477static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8478 u32 portid, u32 seq)
8479{
d59d2f82 8480 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8481 struct nlmsghdr *nlh;
784b4e61 8482 char buf[TASK_COMM_LEN];
dedb67c4 8483 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8484
19c28b13
PNA		 8485 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8486 NFNETLINK_V0, nft_base_seq(net));
8487 if (!nlh)
84d7fce6
PNA		 8488 goto nla_put_failure;
8489
0854db2a 8490 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8491 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8492 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8493 goto nla_put_failure;
8494
053c095a
JB		 8495 nlmsg_end(skb, nlh);
8496 return 0;
84d7fce6
PNA		 8497
8498nla_put_failure:
8499 nlmsg_trim(skb, nlh);
8500 return -EMSGSIZE;
8501}
8502
3b49e2e9
PNA		 8503static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8504 struct nft_flowtable *flowtable)
8505{
3f0465a9 8506 struct nft_hook *hook;
3b49e2e9 8507
3f0465a9
PNA		 8508 list_for_each_entry(hook, &flowtable->hook_list, list) {
8509 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8510 continue;
8511
5acab914 8512 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8513 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8514 list_del_rcu(&hook->list);
8515 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8516 break;
8517 }
8518}
8519
8520static int nf_tables_flowtable_event(struct notifier_block *this,
8521 unsigned long event, void *ptr)
8522{
8523 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8524 struct nft_flowtable *flowtable;
0854db2a 8525 struct nftables_pernet *nft_net;
3b49e2e9 8526 struct nft_table *table;
0a2cf5ee 8527 struct net *net;
3b49e2e9
PNA		 8528
8529 if (event != NETDEV_UNREGISTER)
8530 return 0;
8531
6a48de01 8532 net = dev_net(dev);
d59d2f82 8533 nft_net = nft_pernet(net);
0854db2a
FW		 8534 mutex_lock(&nft_net->commit_mutex);
8535 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8536 list_for_each_entry(flowtable, &table->flowtables, list) {
8537 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8538 }
8539 }
0854db2a 8540 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8541
3b49e2e9
PNA		 8542 return NOTIFY_DONE;
8543}
8544
8545static struct notifier_block nf_tables_flowtable_notifier = {
8546 .notifier_call = nf_tables_flowtable_event,
8547};
8548
25e94a99
PNA		 8549static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8550 int event)
84d7fce6
PNA		 8551{
8552 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8553 struct sk_buff *skb2;
8554 int err;
8555
dceababa 8556 if (!nlmsg_report(nlh) &&
84d7fce6 8557 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8558 return;
84d7fce6 8559
84d7fce6
PNA		 8560 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8561 if (skb2 == NULL)
8562 goto err;
8563
8564 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8565 nlh->nlmsg_seq);
8566 if (err < 0) {
8567 kfree_skb(skb2);
8568 goto err;
8569 }
8570
25e94a99
PNA		 8571 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8572 nlmsg_report(nlh), GFP_KERNEL);
8573 return;
84d7fce6 8574err:
25e94a99
PNA		 8575 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8576 -ENOBUFS);
84d7fce6
PNA		 8577}
8578
797d4980
PNA		 8579static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8580 const struct nlattr * const nla[])
84d7fce6 8581{
84d7fce6
PNA		 8582 struct sk_buff *skb2;
8583 int err;
8584
d9adf22a 8585 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8586 if (skb2 == NULL)
8587 return -ENOMEM;
8588
797d4980
PNA		 8589 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8590 info->nlh->nlmsg_seq);
84d7fce6 8591 if (err < 0)
ee921183 8592 goto err_fill_gen_info;
84d7fce6 8593
797d4980 8594 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8595
8596err_fill_gen_info:
84d7fce6
PNA		 8597 kfree_skb(skb2);
8598 return err;
8599}
8600
96518518
PM		 8601static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8602 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8603 .call = nf_tables_newtable,
8604 .type = NFNL_CB_BATCH,
96518518
PM		 8605 .attr_count = NFTA_TABLE_MAX,
8606 .policy = nft_table_policy,
8607 },
8608 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8609 .call = nf_tables_gettable,
8610 .type = NFNL_CB_RCU,
96518518
PM		 8611 .attr_count = NFTA_TABLE_MAX,
8612 .policy = nft_table_policy,
8613 },
8614 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8615 .call = nf_tables_deltable,
8616 .type = NFNL_CB_BATCH,
96518518
PM		 8617 .attr_count = NFTA_TABLE_MAX,
8618 .policy = nft_table_policy,
8619 },
f80a612d
FFM		 8620 [NFT_MSG_DESTROYTABLE] = {
8621 .call = nf_tables_deltable,
8622 .type = NFNL_CB_BATCH,
8623 .attr_count = NFTA_TABLE_MAX,
8624 .policy = nft_table_policy,
8625 },
96518518 8626 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8627 .call = nf_tables_newchain,
8628 .type = NFNL_CB_BATCH,
96518518
PM		 8629 .attr_count = NFTA_CHAIN_MAX,
8630 .policy = nft_chain_policy,
8631 },
8632 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8633 .call = nf_tables_getchain,
8634 .type = NFNL_CB_RCU,
96518518
PM		 8635 .attr_count = NFTA_CHAIN_MAX,
8636 .policy = nft_chain_policy,
8637 },
8638 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 8639 .call = nf_tables_delchain,
8640 .type = NFNL_CB_BATCH,
96518518
PM		 8641 .attr_count = NFTA_CHAIN_MAX,
8642 .policy = nft_chain_policy,
8643 },
f80a612d
FFM		 8644 [NFT_MSG_DESTROYCHAIN] = {
8645 .call = nf_tables_delchain,
8646 .type = NFNL_CB_BATCH,
8647 .attr_count = NFTA_CHAIN_MAX,
8648 .policy = nft_chain_policy,
8649 },
96518518 8650 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 8651 .call = nf_tables_newrule,
8652 .type = NFNL_CB_BATCH,
96518518
PM		 8653 .attr_count = NFTA_RULE_MAX,
8654 .policy = nft_rule_policy,
8655 },
8656 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 8657 .call = nf_tables_getrule,
8658 .type = NFNL_CB_RCU,
96518518
PM		 8659 .attr_count = NFTA_RULE_MAX,
8660 .policy = nft_rule_policy,
8661 },
8daa8fde
PS		 8662 [NFT_MSG_GETRULE_RESET] = {
8663 .call = nf_tables_getrule,
8664 .type = NFNL_CB_RCU,
8665 .attr_count = NFTA_RULE_MAX,
8666 .policy = nft_rule_policy,
8667 },
96518518 8668 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 8669 .call = nf_tables_delrule,
8670 .type = NFNL_CB_BATCH,
96518518
PM		 8671 .attr_count = NFTA_RULE_MAX,
8672 .policy = nft_rule_policy,
8673 },
f80a612d
FFM		 8674 [NFT_MSG_DESTROYRULE] = {
8675 .call = nf_tables_delrule,
8676 .type = NFNL_CB_BATCH,
8677 .attr_count = NFTA_RULE_MAX,
8678 .policy = nft_rule_policy,
8679 },
20a69341 8680 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 8681 .call = nf_tables_newset,
8682 .type = NFNL_CB_BATCH,
20a69341
PM		 8683 .attr_count = NFTA_SET_MAX,
8684 .policy = nft_set_policy,
8685 },
8686 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 8687 .call = nf_tables_getset,
8688 .type = NFNL_CB_RCU,
20a69341
PM		 8689 .attr_count = NFTA_SET_MAX,
8690 .policy = nft_set_policy,
8691 },
8692 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 8693 .call = nf_tables_delset,
8694 .type = NFNL_CB_BATCH,
20a69341
PM		 8695 .attr_count = NFTA_SET_MAX,
8696 .policy = nft_set_policy,
8697 },
f80a612d
FFM		 8698 [NFT_MSG_DESTROYSET] = {
8699 .call = nf_tables_delset,
8700 .type = NFNL_CB_BATCH,
8701 .attr_count = NFTA_SET_MAX,
8702 .policy = nft_set_policy,
8703 },
20a69341 8704 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 8705 .call = nf_tables_newsetelem,
8706 .type = NFNL_CB_BATCH,
20a69341
PM		 8707 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8708 .policy = nft_set_elem_list_policy,
8709 },
8710 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 8711 .call = nf_tables_getsetelem,
8712 .type = NFNL_CB_RCU,
20a69341
PM		 8713 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8714 .policy = nft_set_elem_list_policy,
8715 },
8716 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 8717 .call = nf_tables_delsetelem,
8718 .type = NFNL_CB_BATCH,
20a69341
PM		 8719 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8720 .policy = nft_set_elem_list_policy,
8721 },
f80a612d
FFM		 8722 [NFT_MSG_DESTROYSETELEM] = {
8723 .call = nf_tables_delsetelem,
8724 .type = NFNL_CB_BATCH,
8725 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8726 .policy = nft_set_elem_list_policy,
8727 },
84d7fce6 8728 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 8729 .call = nf_tables_getgen,
8730 .type = NFNL_CB_RCU,
84d7fce6 8731 },
e5009240 8732 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 8733 .call = nf_tables_newobj,
8734 .type = NFNL_CB_BATCH,
e5009240
PNA		 8735 .attr_count = NFTA_OBJ_MAX,
8736 .policy = nft_obj_policy,
8737 },
8738 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 8739 .call = nf_tables_getobj,
8740 .type = NFNL_CB_RCU,
e5009240
PNA		 8741 .attr_count = NFTA_OBJ_MAX,
8742 .policy = nft_obj_policy,
8743 },
8744 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 8745 .call = nf_tables_delobj,
8746 .type = NFNL_CB_BATCH,
e5009240
PNA		 8747 .attr_count = NFTA_OBJ_MAX,
8748 .policy = nft_obj_policy,
8749 },
f80a612d
FFM		 8750 [NFT_MSG_DESTROYOBJ] = {
8751 .call = nf_tables_delobj,
8752 .type = NFNL_CB_BATCH,
8753 .attr_count = NFTA_OBJ_MAX,
8754 .policy = nft_obj_policy,
8755 },
43da04a5 8756 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 8757 .call = nf_tables_getobj,
8758 .type = NFNL_CB_RCU,
43da04a5
PNA		 8759 .attr_count = NFTA_OBJ_MAX,
8760 .policy = nft_obj_policy,
8761 },
3b49e2e9 8762 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 8763 .call = nf_tables_newflowtable,
8764 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8765 .attr_count = NFTA_FLOWTABLE_MAX,
8766 .policy = nft_flowtable_policy,
8767 },
8768 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 8769 .call = nf_tables_getflowtable,
8770 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 8771 .attr_count = NFTA_FLOWTABLE_MAX,
8772 .policy = nft_flowtable_policy,
8773 },
8774 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 8775 .call = nf_tables_delflowtable,
8776 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8777 .attr_count = NFTA_FLOWTABLE_MAX,
8778 .policy = nft_flowtable_policy,
8779 },
f80a612d
FFM		 8780 [NFT_MSG_DESTROYFLOWTABLE] = {
8781 .call = nf_tables_delflowtable,
8782 .type = NFNL_CB_BATCH,
8783 .attr_count = NFTA_FLOWTABLE_MAX,
8784 .policy = nft_flowtable_policy,
8785 },
96518518
PM		 8786};
8787
a654de8f
PNA		 8788static int nf_tables_validate(struct net *net)
8789{
d59d2f82 8790 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 8791 struct nft_table *table;
8792
00c320f9
FW		 8793 list_for_each_entry(table, &nft_net->tables, list) {
8794 switch (table->validate_state) {
8795 case NFT_VALIDATE_SKIP:
8796 continue;
8797 case NFT_VALIDATE_NEED:
8798 nft_validate_state_update(table, NFT_VALIDATE_DO);
8799 fallthrough;
8800 case NFT_VALIDATE_DO:
a654de8f
PNA		 8801 if (nft_table_validate(net, table) < 0)
8802 return -EAGAIN;
00c320f9
FW		 8803
8804 nft_validate_state_update(table, NFT_VALIDATE_SKIP);
a654de8f 8805 }
9a32e985 8806
a654de8f
PNA		 8807 break;
8808 }
8809
8810 return 0;
8811}
8812
66293c46
FW		 8813/* a drop policy has to be deferred until all rules have been activated,
8814 * otherwise a large ruleset that contains a drop-policy base chain will
8815 * cause all packets to get dropped until the full transaction has been
8816 * processed.
8817 *
8818 * We defer the drop policy until the transaction has been finalized.
8819 */
8820static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8821{
8822 struct nft_base_chain *basechain;
8823
8824 if (nft_trans_chain_policy(trans) != NF_DROP)
8825 return;
8826
8827 if (!nft_is_base_chain(trans->ctx.chain))
8828 return;
8829
8830 basechain = nft_base_chain(trans->ctx.chain);
8831 basechain->policy = NF_DROP;
8832}
8833
91c7b38d
PNA		 8834static void nft_chain_commit_update(struct nft_trans *trans)
8835{
8836 struct nft_base_chain *basechain;
8837
1b2470e5
FW		 8838 if (nft_trans_chain_name(trans)) {
8839 rhltable_remove(&trans->ctx.table->chains_ht,
8840 &trans->ctx.chain->rhlhead,
8841 nft_chain_ht_params);
d71efb59 8842 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 8843 rhltable_insert_key(&trans->ctx.table->chains_ht,
8844 trans->ctx.chain->name,
8845 &trans->ctx.chain->rhlhead,
8846 nft_chain_ht_params);
8847 }
91c7b38d 8848
f323d954 8849 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 8850 return;
8851
53315ac6
FW		 8852 nft_chain_stats_replace(trans);
8853
91c7b38d 8854 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 8855
8856 switch (nft_trans_chain_policy(trans)) {
8857 case NF_DROP:
8858 case NF_ACCEPT:
8859 basechain->policy = nft_trans_chain_policy(trans);
8860 break;
8861 }
8862}
8863
d62d0ba9
FFM		 8864static void nft_obj_commit_update(struct nft_trans *trans)
8865{
8866 struct nft_object *newobj;
8867 struct nft_object *obj;
8868
8869 obj = nft_trans_obj(trans);
8870 newobj = nft_trans_obj_newobj(trans);
8871
9fedd894
FFM		 8872 if (obj->ops->update)
8873 obj->ops->update(obj, newobj);
d62d0ba9 8874
dad3bdee 8875 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 8876}
8877
2f99aa31 8878static void nft_commit_release(struct nft_trans *trans)
c7c32e72 8879{
c7c32e72
PNA		 8880 switch (trans->msg_type) {
8881 case NFT_MSG_DELTABLE:
f80a612d 8882 case NFT_MSG_DESTROYTABLE:
c7c32e72
PNA		 8883 nf_tables_table_destroy(&trans->ctx);
8884 break;
9f8aac0b 8885 case NFT_MSG_NEWCHAIN:
53315ac6 8886 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 8887 kfree(nft_trans_chain_name(trans));
8888 break;
c7c32e72 8889 case NFT_MSG_DELCHAIN:
f80a612d 8890 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 8891 if (nft_trans_chain_update(trans))
8892 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
8893 else
8894 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 8895 break;
8896 case NFT_MSG_DELRULE:
f80a612d 8897 case NFT_MSG_DESTROYRULE:
c7c32e72
PNA		 8898 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8899 break;
8900 case NFT_MSG_DELSET:
f80a612d 8901 case NFT_MSG_DESTROYSET:
0c2a85ed 8902 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 8903 break;
61edafbb 8904 case NFT_MSG_DELSETELEM:
f80a612d 8905 case NFT_MSG_DESTROYSETELEM:
3453c927
PNA		 8906 nf_tables_set_elem_destroy(&trans->ctx,
8907 nft_trans_elem_set(trans),
59105446 8908 nft_trans_elem(trans).priv);
61edafbb 8909 break;
e5009240 8910 case NFT_MSG_DELOBJ:
f80a612d 8911 case NFT_MSG_DESTROYOBJ:
00bfb320 8912 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 8913 break;
3b49e2e9 8914 case NFT_MSG_DELFLOWTABLE:
f80a612d 8915 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 8916 if (nft_trans_flowtable_update(trans))
cdc32546 8917 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
abadb2f8
PNA		 8918 else
8919 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 8920 break;
c7c32e72 8921 }
0935d558
FW		 8922
8923 if (trans->put_net)
8924 put_net(trans->ctx.net);
8925
c7c32e72
PNA		 8926 kfree(trans);
8927}
8928
0935d558 8929static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 8930{
8931 struct nft_trans *trans, *next;
0935d558
FW		 8932 LIST_HEAD(head);
8933
8934 spin_lock(&nf_tables_destroy_list_lock);
8935 list_splice_init(&nf_tables_destroy_list, &head);
8936 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 8937
0935d558 8938 if (list_empty(&head))
2f99aa31
FW		 8939 return;
8940
8941 synchronize_rcu();
8942
0935d558 8943 list_for_each_entry_safe(trans, next, &head, list) {
2f99aa31
FW		 8944 list_del(&trans->list);
8945 nft_commit_release(trans);
8946 }
8947}
8948
ffe8923f
FW		 8949void nf_tables_trans_destroy_flush_work(void)
8950{
8951 flush_work(&trans_destroy_work);
8952}
8953EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
8954
ed5f85d4
PNA		 8955static bool nft_expr_reduce(struct nft_regs_track *track,
8956 const struct nft_expr *expr)
8957{
9e539c5b 8958 return false;
ed5f85d4
PNA		 8959}
8960
0cbc06b3
FW		 8961static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
8962{
2c865a8a 8963 const struct nft_expr *expr, *last;
12e4ecfa 8964 struct nft_regs_track track = {};
2c865a8a
PNA		 8965 unsigned int size, data_size;
8966 void *data, *data_boundary;
8967 struct nft_rule_dp *prule;
0cbc06b3 8968 struct nft_rule *rule;
0cbc06b3
FW		 8969
8970 /* already handled or inactive chain? */
2c865a8a 8971 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 8972 return 0;
8973
63045bfd 8974 data_size = 0;
10377d42 8975 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8976 if (nft_is_active_next(net, rule)) {
8977 data_size += sizeof(*prule) + rule->dlen;
8978 if (data_size > INT_MAX)
8979 return -ENOMEM;
8980 }
0cbc06b3
FW		 8981 }
8982
e38fbfa9 8983 chain->blob_next = nf_tables_chain_alloc_rules(chain, data_size);
2c865a8a 8984 if (!chain->blob_next)
0cbc06b3
FW		 8985 return -ENOMEM;
8986
2c865a8a
PNA		 8987 data = (void *)chain->blob_next->data;
8988 data_boundary = data + data_size;
8989 size = 0;
8990
10377d42 8991 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8992 if (!nft_is_active_next(net, rule))
8993 continue;
8994
8995 prule = (struct nft_rule_dp *)data;
8996 data += offsetof(struct nft_rule_dp, data);
8997 if (WARN_ON_ONCE(data > data_boundary))
8998 return -ENOMEM;
8999
12e4ecfa 9000 size = 0;
fe75e84a 9001 track.last = nft_expr_last(rule);
2c865a8a 9002 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 9003 track.cur = expr;
9004
ed5f85d4 9005 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 9006 expr = track.cur;
9007 continue;
9008 }
9009
2c865a8a
PNA		 9010 if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
9011 return -ENOMEM;
9012
9013 memcpy(data + size, expr, expr->ops->size);
9014 size += expr->ops->size;
9015 }
9016 if (WARN_ON_ONCE(size >= 1 << 12))
9017 return -ENOMEM;
9018
9019 prule->handle = rule->handle;
9020 prule->dlen = size;
9021 prule->is_last = 0;
9022
9023 data += size;
9024 size = 0;
9025 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 9026 }
9027
2c865a8a
PNA		 9028 if (WARN_ON_ONCE(data > data_boundary))
9029 return -ENOMEM;
9030
e38fbfa9
FW		 9031 prule = (struct nft_rule_dp *)data;
9032 nft_last_rule(chain, prule);
2c865a8a 9033
0cbc06b3
FW		 9034 return 0;
9035}
9036
9037static void nf_tables_commit_chain_prepare_cancel(struct net *net)
9038{
d59d2f82 9039 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 9040 struct nft_trans *trans, *next;
9041
0854db2a 9042 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 9043 struct nft_chain *chain = trans->ctx.chain;
9044
9045 if (trans->msg_type == NFT_MSG_NEWRULE ||
9046 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 9047 kvfree(chain->blob_next);
9048 chain->blob_next = NULL;
0cbc06b3
FW		 9049 }
9050 }
9051}
9052
e38fbfa9 9053static void __nf_tables_commit_chain_free_rules(struct rcu_head *h)
0cbc06b3 9054{
e38fbfa9 9055 struct nft_rule_dp_last *l = container_of(h, struct nft_rule_dp_last, h);
0cbc06b3 9056
e38fbfa9 9057 kvfree(l->blob);
0cbc06b3
FW		 9058}
9059
2c865a8a 9060static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 9061{
e38fbfa9 9062 struct nft_rule_dp_last *last;
0cbc06b3 9063
e38fbfa9
FW		 9064 /* last rule trailer is after end marker */
9065 last = (void *)blob + sizeof(*blob) + blob->size;
9066 last->blob = blob;
0cbc06b3 9067
e38fbfa9 9068 call_rcu(&last->h, __nf_tables_commit_chain_free_rules);
0cbc06b3
FW		 9069}
9070
0fb39bbe 9071static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 9072{
2c865a8a 9073 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 9074 bool next_genbit;
9075
9076 next_genbit = nft_gencursor_next(net);
9077
2c865a8a 9078 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 9079 lockdep_commit_lock_is_held(net));
2c865a8a 9080 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 9081 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 9082
9083 /* No changes to this chain? */
2c865a8a 9084 if (chain->blob_next == NULL) {
0cbc06b3
FW		 9085 /* chain had no change in last or next generation */
9086 if (g0 == g1)
9087 return;
9088 /*
9089 * chain had no change in this generation; make sure next
9090 * one uses same rules as current generation.
9091 */
9092 if (next_genbit) {
2c865a8a 9093 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 9094 nf_tables_commit_chain_free_rules_old(g1);
9095 } else {
2c865a8a 9096 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 9097 nf_tables_commit_chain_free_rules_old(g0);
9098 }
9099
9100 return;
9101 }
9102
9103 if (next_genbit)
2c865a8a 9104 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 9105 else
2c865a8a 9106 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 9107
2c865a8a 9108 chain->blob_next = NULL;
0cbc06b3
FW		 9109
9110 if (g0 == g1)
9111 return;
9112
9113 if (next_genbit)
9114 nf_tables_commit_chain_free_rules_old(g1);
9115 else
9116 nf_tables_commit_chain_free_rules_old(g0);
9117}
9118
d152159b
FW		 9119static void nft_obj_del(struct nft_object *obj)
9120{
4d44175a 9121 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 9122 list_del_rcu(&obj->list);
9123}
9124
d0e2c7de 9125void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 9126{
9127 struct nft_table *table = chain->table;
9128
9129 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
9130 nft_chain_ht_params));
9131 list_del_rcu(&chain->list);
9132}
9133
eb014de4
PNA		 9134static void nf_tables_module_autoload_cleanup(struct net *net)
9135{
d59d2f82 9136 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9137 struct nft_module_request *req, *next;
9138
0854db2a
FW		 9139 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
9140 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 9141 WARN_ON_ONCE(!req->done);
9142 list_del(&req->list);
9143 kfree(req);
9144 }
9145}
9146
0935d558
FW		 9147static void nf_tables_commit_release(struct net *net)
9148{
d59d2f82 9149 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 9150 struct nft_trans *trans;
9151
9152 /* all side effects have to be made visible.
9153 * For example, if a chain named 'foo' has been deleted, a
9154 * new transaction must not find it anymore.
9155 *
9156 * Memory reclaim happens asynchronously from work queue
9157 * to prevent expensive synchronize_rcu() in commit phase.
9158 */
0854db2a 9159 if (list_empty(&nft_net->commit_list)) {
eb014de4 9160 nf_tables_module_autoload_cleanup(net);
0854db2a 9161 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9162 return;
9163 }
9164
0854db2a 9165 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 9166 struct nft_trans, list);
9167 get_net(trans->ctx.net);
9168 WARN_ON_ONCE(trans->put_net);
9169
9170 trans->put_net = true;
9171 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 9172 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 9173 spin_unlock(&nf_tables_destroy_list_lock);
9174
eb014de4 9175 nf_tables_module_autoload_cleanup(net);
0935d558 9176 schedule_work(&trans_destroy_work);
ffe8923f 9177
0854db2a 9178 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 9179}
9180
67cc570e
PNA		 9181static void nft_commit_notify(struct net *net, u32 portid)
9182{
d59d2f82 9183 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 9184 struct sk_buff *batch_skb = NULL, *nskb, *skb;
9185 unsigned char *data;
9186 int len;
9187
0854db2a 9188 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 9189 if (!batch_skb) {
9190new_batch:
9191 batch_skb = skb;
9192 len = NLMSG_GOODSIZE - skb->len;
9193 list_del(&skb->list);
9194 continue;
9195 }
9196 len -= skb->len;
9197 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
9198 data = skb_put(batch_skb, skb->len);
9199 memcpy(data, skb->data, skb->len);
9200 list_del(&skb->list);
9201 kfree_skb(skb);
9202 continue;
9203 }
9204 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9205 NFT_CB(batch_skb).report, GFP_KERNEL);
9206 goto new_batch;
9207 }
9208
9209 if (batch_skb) {
9210 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9211 NFT_CB(batch_skb).report, GFP_KERNEL);
9212 }
9213
0854db2a 9214 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 9215}
9216
c520292f
RGB		 9217static int nf_tables_commit_audit_alloc(struct list_head *adl,
9218 struct nft_table *table)
9219{
9220 struct nft_audit_data *adp;
9221
9222 list_for_each_entry(adp, adl, list) {
9223 if (adp->table == table)
9224 return 0;
9225 }
9226 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
9227 if (!adp)
9228 return -ENOMEM;
9229 adp->table = table;
9230 list_add(&adp->list, adl);
9231 return 0;
9232}
9233
cfbe3650
DM		 9234static void nf_tables_commit_audit_free(struct list_head *adl)
9235{
9236 struct nft_audit_data *adp, *adn;
9237
9238 list_for_each_entry_safe(adp, adn, adl, list) {
9239 list_del(&adp->list);
9240 kfree(adp);
9241 }
9242}
9243
c520292f
RGB		 9244static void nf_tables_commit_audit_collect(struct list_head *adl,
9245 struct nft_table *table, u32 op)
9246{
9247 struct nft_audit_data *adp;
9248
9249 list_for_each_entry(adp, adl, list) {
9250 if (adp->table == table)
9251 goto found;
9252 }
dadf33c9 9253 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 9254 return;
9255found:
9256 adp->entries++;
9257 if (!adp->op || adp->op > op)
9258 adp->op = op;
9259}
9260
9261#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
9262
9263static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
9264{
9265 struct nft_audit_data *adp, *adn;
9266 char aubuf[AUNFTABLENAMELEN];
9267
9268 list_for_each_entry_safe(adp, adn, adl, list) {
9269 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
9270 generation);
9271 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
9272 nft2audit_op[adp->op], GFP_KERNEL);
9273 list_del(&adp->list);
9274 kfree(adp);
9275 }
9276}
9277
5913beaf 9278static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 9279{
d59d2f82 9280 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9281 struct nft_trans *trans, *next;
a3716e70 9282 struct nft_trans_elem *te;
0cbc06b3
FW		 9283 struct nft_chain *chain;
9284 struct nft_table *table;
34002783 9285 unsigned int base_seq;
c520292f 9286 LIST_HEAD(adl);
c9626a2c 9287 int err;
37082f93 9288
0854db2a
FW		 9289 if (list_empty(&nft_net->commit_list)) {
9290 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 9291 return 0;
9292 }
9293
a654de8f
PNA		 9294 /* 0. Validate ruleset, otherwise roll back for error reporting. */
9295 if (nf_tables_validate(net) < 0)
9296 return -EAGAIN;
9297
c9626a2c
PNA		 9298 err = nft_flow_rule_offload_commit(net);
9299 if (err < 0)
9300 return err;
9301
0cbc06b3 9302 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 9303 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 9304 int ret;
37082f93 9305
c520292f
RGB		 9306 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
9307 if (ret) {
9308 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9309 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 9310 return ret;
9311 }
0cbc06b3
FW		 9312 if (trans->msg_type == NFT_MSG_NEWRULE ||
9313 trans->msg_type == NFT_MSG_DELRULE) {
9314 chain = trans->ctx.chain;
9315
9316 ret = nf_tables_commit_chain_prepare(net, chain);
9317 if (ret < 0) {
9318 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 9319 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 9320 return ret;
9321 }
9322 }
9323 }
37082f93 9324
0cbc06b3 9325 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 9326 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 9327 list_for_each_entry(chain, &table->chains, list)
9328 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 9329 }
9330
9331 /*
9332 * Bump generation counter, invalidate any dump in progress.
9333 * Cannot fail after this point.
37082f93 9334 */
34002783
PNA		 9335 base_seq = READ_ONCE(nft_net->base_seq);
9336 while (++base_seq == 0)
0854db2a 9337 ;
0cbc06b3 9338
34002783
PNA		 9339 WRITE_ONCE(nft_net->base_seq, base_seq);
9340
0cbc06b3
FW		 9341 /* step 3. Start new generation, rules_gen_X now in use. */
9342 net->nft.gencursor = nft_gencursor_next(net);
37082f93 9343
0854db2a 9344 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 9345 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
9346 trans->msg_type);
b380e5c7 9347 switch (trans->msg_type) {
55dd6f93
PNA		 9348 case NFT_MSG_NEWTABLE:
9349 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9350 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9351 nft_trans_destroy(trans);
9352 break;
9353 }
9354 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 9355 nf_tables_table_disable(net, trans->ctx.table);
9356
179d9ba5 9357 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 9358 } else {
f2a6d766 9359 nft_clear(net, trans->ctx.table);
55dd6f93 9360 }
35151d84 9361 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 9362 nft_trans_destroy(trans);
9363 break;
9364 case NFT_MSG_DELTABLE:
f80a612d 9365 case NFT_MSG_DESTROYTABLE:
f2a6d766 9366 list_del_rcu(&trans->ctx.table->list);
f80a612d 9367 nf_tables_table_notify(&trans->ctx, trans->msg_type);
55dd6f93 9368 break;
91c7b38d 9369 case NFT_MSG_NEWCHAIN:
9f8aac0b 9370 if (nft_trans_chain_update(trans)) {
91c7b38d 9371 nft_chain_commit_update(trans);
b9703ed4
PNA		 9372 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN,
9373 &nft_trans_chain_hooks(trans));
9374 list_splice(&nft_trans_chain_hooks(trans),
9375 &nft_trans_basechain(trans)->hook_list);
9f8aac0b
FW		 9376 /* trans destroyed after rcu grace period */
9377 } else {
66293c46 9378 nft_chain_commit_drop_policy(trans);
664b0f8c 9379 nft_clear(net, trans->ctx.chain);
b9703ed4 9380 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
9f8aac0b
FW		 9381 nft_trans_destroy(trans);
9382 }
91c7b38d
PNA		 9383 break;
9384 case NFT_MSG_DELCHAIN:
f80a612d 9385 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9386 if (nft_trans_chain_update(trans)) {
9387 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9388 &nft_trans_chain_hooks(trans));
9389 nft_netdev_unregister_hooks(net,
9390 &nft_trans_chain_hooks(trans),
9391 true);
9392 } else {
9393 nft_chain_del(trans->ctx.chain);
9394 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
9395 NULL);
9396 nf_tables_unregister_hook(trans->ctx.net,
9397 trans->ctx.table,
9398 trans->ctx.chain);
9399 }
91c7b38d 9400 break;
b380e5c7 9401 case NFT_MSG_NEWRULE:
889f7ee7 9402 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 9403 nf_tables_rule_notify(&trans->ctx,
37082f93 9404 nft_trans_rule(trans),
35151d84 9405 NFT_MSG_NEWRULE);
9dd732e0
PNA		 9406 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9407 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9408
37082f93 9409 nft_trans_destroy(trans);
b380e5c7
PNA		 9410 break;
9411 case NFT_MSG_DELRULE:
f80a612d 9412 case NFT_MSG_DESTROYRULE:
b380e5c7 9413 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 9414 nf_tables_rule_notify(&trans->ctx,
9415 nft_trans_rule(trans),
f80a612d 9416 trans->msg_type);
f6ac8585
PNA		 9417 nft_rule_expr_deactivate(&trans->ctx,
9418 nft_trans_rule(trans),
9419 NFT_TRANS_COMMIT);
26b5934f
PNA		 9420
9421 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9422 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7 9423 break;
958bee14 9424 case NFT_MSG_NEWSET:
123b9961
PNA		 9425 if (nft_trans_set_update(trans)) {
9426 struct nft_set *set = nft_trans_set(trans);
4fefee57 9427
123b9961
PNA		 9428 WRITE_ONCE(set->timeout, nft_trans_set_timeout(trans));
9429 WRITE_ONCE(set->gc_int, nft_trans_set_gc_int(trans));
9430 } else {
9431 nft_clear(net, nft_trans_set(trans));
9432 /* This avoids hitting -EBUSY when deleting the table
9433 * from the transaction.
9434 */
9435 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
9436 !list_empty(&nft_trans_set(trans)->bindings))
9437 trans->ctx.table->use--;
9438 }
958bee14 9439 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 9440 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 9441 nft_trans_destroy(trans);
9442 break;
9443 case NFT_MSG_DELSET:
f80a612d 9444 case NFT_MSG_DESTROYSET:
37a9cc52 9445 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 9446 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
f80a612d 9447 trans->msg_type, GFP_KERNEL);
958bee14 9448 break;
60319eb1 9449 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 9450 te = (struct nft_trans_elem *)trans->data;
9451
aaa31047 9452 nft_setelem_activate(net, te->set, &te->elem);
cc02e457
PM		 9453 nf_tables_setelem_notify(&trans->ctx, te->set,
9454 &te->elem,
6fb721cf 9455 NFT_MSG_NEWSETELEM);
60319eb1
PNA		 9456 nft_trans_destroy(trans);
9457 break;
9458 case NFT_MSG_DELSETELEM:
f80a612d 9459 case NFT_MSG_DESTROYSETELEM:
a3716e70 9460 te = (struct nft_trans_elem *)trans->data;
fe2811eb 9461
a3716e70
PNA		 9462 nf_tables_setelem_notify(&trans->ctx, te->set,
9463 &te->elem,
f80a612d 9464 trans->msg_type);
aaa31047
PNA		 9465 nft_setelem_remove(net, te->set, &te->elem);
9466 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9467 atomic_dec(&te->set->nelems);
9468 te->set->ndeact--;
9469 }
60319eb1 9470 break;
e5009240 9471 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 9472 if (nft_trans_obj_update(trans)) {
9473 nft_obj_commit_update(trans);
9474 nf_tables_obj_notify(&trans->ctx,
9475 nft_trans_obj(trans),
9476 NFT_MSG_NEWOBJ);
9477 } else {
9478 nft_clear(net, nft_trans_obj(trans));
9479 nf_tables_obj_notify(&trans->ctx,
9480 nft_trans_obj(trans),
9481 NFT_MSG_NEWOBJ);
9482 nft_trans_destroy(trans);
9483 }
e5009240
PNA		 9484 break;
9485 case NFT_MSG_DELOBJ:
f80a612d 9486 case NFT_MSG_DESTROYOBJ:
d152159b 9487 nft_obj_del(nft_trans_obj(trans));
e5009240 9488 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
f80a612d 9489 trans->msg_type);
e5009240 9490 break;
3b49e2e9 9491 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9492 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 9493 nft_trans_flowtable(trans)->data.flags =
9494 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 9495 nf_tables_flowtable_notify(&trans->ctx,
9496 nft_trans_flowtable(trans),
9497 &nft_trans_flowtable_hooks(trans),
9498 NFT_MSG_NEWFLOWTABLE);
9499 list_splice(&nft_trans_flowtable_hooks(trans),
9500 &nft_trans_flowtable(trans)->hook_list);
9501 } else {
9502 nft_clear(net, nft_trans_flowtable(trans));
9503 nf_tables_flowtable_notify(&trans->ctx,
9504 nft_trans_flowtable(trans),
28339b21 9505 NULL,
78d9f48f
PNA		 9506 NFT_MSG_NEWFLOWTABLE);
9507 }
3b49e2e9
PNA		 9508 nft_trans_destroy(trans);
9509 break;
9510 case NFT_MSG_DELFLOWTABLE:
f80a612d 9511 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9512 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 9513 nf_tables_flowtable_notify(&trans->ctx,
9514 nft_trans_flowtable(trans),
9515 &nft_trans_flowtable_hooks(trans),
f80a612d 9516 trans->msg_type);
abadb2f8
PNA		 9517 nft_unregister_flowtable_net_hooks(net,
9518 &nft_trans_flowtable_hooks(trans));
9519 } else {
9520 list_del_rcu(&nft_trans_flowtable(trans)->list);
9521 nf_tables_flowtable_notify(&trans->ctx,
9522 nft_trans_flowtable(trans),
28339b21 9523 NULL,
f80a612d 9524 trans->msg_type);
abadb2f8
PNA		 9525 nft_unregister_flowtable_net_hooks(net,
9526 &nft_trans_flowtable(trans)->hook_list);
9527 }
3b49e2e9 9528 break;
37082f93 9529 }
37082f93
PNA		 9530 }
9531
67cc570e 9532 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 9533 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 9534 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
0935d558 9535 nf_tables_commit_release(net);
37082f93
PNA		 9536
9537 return 0;
9538}
9539
eb014de4
PNA		 9540static void nf_tables_module_autoload(struct net *net)
9541{
d59d2f82 9542 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9543 struct nft_module_request *req, *next;
9544 LIST_HEAD(module_list);
9545
0854db2a
FW		 9546 list_splice_init(&nft_net->module_list, &module_list);
9547 mutex_unlock(&nft_net->commit_mutex);
eb014de4 9548 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 9549 request_module("%s", req->module);
9550 req->done = true;
eb014de4 9551 }
0854db2a
FW		 9552 mutex_lock(&nft_net->commit_mutex);
9553 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 9554}
9555
b326dd37 9556static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 9557{
c7c32e72
PNA		 9558 switch (trans->msg_type) {
9559 case NFT_MSG_NEWTABLE:
9560 nf_tables_table_destroy(&trans->ctx);
9561 break;
9562 case NFT_MSG_NEWCHAIN:
b9703ed4
PNA		 9563 if (nft_trans_chain_update(trans))
9564 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9565 else
9566 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9567 break;
9568 case NFT_MSG_NEWRULE:
9569 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9570 break;
9571 case NFT_MSG_NEWSET:
0c2a85ed 9572 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9573 break;
61edafbb
PM		 9574 case NFT_MSG_NEWSETELEM:
9575 nft_set_elem_destroy(nft_trans_elem_set(trans),
61f9e292 9576 nft_trans_elem(trans).priv, true);
61edafbb 9577 break;
e5009240 9578 case NFT_MSG_NEWOBJ:
00bfb320 9579 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9580 break;
3b49e2e9 9581 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9582 if (nft_trans_flowtable_update(trans))
cdc32546 9583 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
78d9f48f
PNA		 9584 else
9585 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9586 break;
c7c32e72
PNA		 9587 }
9588 kfree(trans);
9589}
9590
c0391b6a 9591static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 9592{
d59d2f82 9593 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9594 struct nft_trans *trans, *next;
02263db0 9595 struct nft_trans_elem *te;
37082f93 9596
c0391b6a
PNA		 9597 if (action == NFNL_ABORT_VALIDATE &&
9598 nf_tables_validate(net) < 0)
9599 return -EAGAIN;
9600
0854db2a 9601 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 9602 list) {
b380e5c7 9603 switch (trans->msg_type) {
55dd6f93
PNA		 9604 case NFT_MSG_NEWTABLE:
9605 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9606 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9607 nft_trans_destroy(trans);
9608 break;
9609 }
9610 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 9611 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 9612 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
9613 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
9614 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
9615 }
9616 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 9617 nft_trans_destroy(trans);
9618 } else {
e688a7f8 9619 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 9620 }
9621 break;
9622 case NFT_MSG_DELTABLE:
f80a612d 9623 case NFT_MSG_DESTROYTABLE:
f2a6d766 9624 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 9625 nft_trans_destroy(trans);
9626 break;
91c7b38d
PNA		 9627 case NFT_MSG_NEWCHAIN:
9628 if (nft_trans_chain_update(trans)) {
b9703ed4
PNA		 9629 nft_netdev_unregister_hooks(net,
9630 &nft_trans_chain_hooks(trans),
9631 true);
982f4051 9632 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 9633 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 9634 nft_trans_destroy(trans);
9635 } else {
d0e2c7de
PNA		 9636 if (nft_chain_is_bound(trans->ctx.chain)) {
9637 nft_trans_destroy(trans);
9638 break;
9639 }
4fefee57 9640 trans->ctx.table->use--;
1b2470e5 9641 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 9642 nf_tables_unregister_hook(trans->ctx.net,
9643 trans->ctx.table,
9644 trans->ctx.chain);
91c7b38d
PNA		 9645 }
9646 break;
9647 case NFT_MSG_DELCHAIN:
f80a612d 9648 case NFT_MSG_DESTROYCHAIN:
7d937b10
PNA		 9649 if (nft_trans_chain_update(trans)) {
9650 list_splice(&nft_trans_chain_hooks(trans),
9651 &nft_trans_basechain(trans)->hook_list);
9652 } else {
9653 trans->ctx.table->use++;
9654 nft_clear(trans->ctx.net, trans->ctx.chain);
9655 }
91c7b38d
PNA		 9656 nft_trans_destroy(trans);
9657 break;
b380e5c7 9658 case NFT_MSG_NEWRULE:
4fefee57 9659 trans->ctx.chain->use--;
b380e5c7 9660 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 9661 nft_rule_expr_deactivate(&trans->ctx,
9662 nft_trans_rule(trans),
9663 NFT_TRANS_ABORT);
3c5e4462
PNA		 9664 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9665 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 9666 break;
9667 case NFT_MSG_DELRULE:
f80a612d 9668 case NFT_MSG_DESTROYRULE:
4fefee57 9669 trans->ctx.chain->use++;
889f7ee7 9670 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 9671 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 9672 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9673 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9674
37082f93 9675 nft_trans_destroy(trans);
b380e5c7 9676 break;
958bee14 9677 case NFT_MSG_NEWSET:
123b9961
PNA		 9678 if (nft_trans_set_update(trans)) {
9679 nft_trans_destroy(trans);
9680 break;
9681 }
4fefee57 9682 trans->ctx.table->use--;
6a0a8d10 9683 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 9684 nft_trans_destroy(trans);
9685 break;
9686 }
9687 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 9688 break;
9689 case NFT_MSG_DELSET:
f80a612d 9690 case NFT_MSG_DESTROYSET:
4fefee57 9691 trans->ctx.table->use++;
37a9cc52 9692 nft_clear(trans->ctx.net, nft_trans_set(trans));
958bee14
PNA		 9693 nft_trans_destroy(trans);
9694 break;
60319eb1 9695 case NFT_MSG_NEWSETELEM:
6a0a8d10 9696 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 9697 nft_trans_destroy(trans);
9698 break;
9699 }
02263db0 9700 te = (struct nft_trans_elem *)trans->data;
aaa31047
PNA		 9701 nft_setelem_remove(net, te->set, &te->elem);
9702 if (!nft_setelem_is_catchall(te->set, &te->elem))
9703 atomic_dec(&te->set->nelems);
60319eb1
PNA		 9704 break;
9705 case NFT_MSG_DELSETELEM:
f80a612d 9706 case NFT_MSG_DESTROYSETELEM:
cc02e457
PM		 9707 te = (struct nft_trans_elem *)trans->data;
9708
f8bb7889 9709 nft_setelem_data_activate(net, te->set, &te->elem);
aaa31047
PNA		 9710 nft_setelem_activate(net, te->set, &te->elem);
9711 if (!nft_setelem_is_catchall(te->set, &te->elem))
9712 te->set->ndeact--;
cc02e457 9713
e5009240
PNA		 9714 nft_trans_destroy(trans);
9715 break;
9716 case NFT_MSG_NEWOBJ:
d62d0ba9 9717 if (nft_trans_obj_update(trans)) {
dad3bdee 9718 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 9719 nft_trans_destroy(trans);
9720 } else {
9721 trans->ctx.table->use--;
9722 nft_obj_del(nft_trans_obj(trans));
9723 }
e5009240
PNA		 9724 break;
9725 case NFT_MSG_DELOBJ:
f80a612d 9726 case NFT_MSG_DESTROYOBJ:
e5009240
PNA		 9727 trans->ctx.table->use++;
9728 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 9729 nft_trans_destroy(trans);
9730 break;
3b49e2e9 9731 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9732 if (nft_trans_flowtable_update(trans)) {
9733 nft_unregister_flowtable_net_hooks(net,
9734 &nft_trans_flowtable_hooks(trans));
9735 } else {
9736 trans->ctx.table->use--;
9737 list_del_rcu(&nft_trans_flowtable(trans)->list);
9738 nft_unregister_flowtable_net_hooks(net,
9739 &nft_trans_flowtable(trans)->hook_list);
9740 }
3b49e2e9
PNA		 9741 break;
9742 case NFT_MSG_DELFLOWTABLE:
f80a612d 9743 case NFT_MSG_DESTROYFLOWTABLE:
abadb2f8 9744 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 9745 list_splice(&nft_trans_flowtable_hooks(trans),
9746 &nft_trans_flowtable(trans)->hook_list);
abadb2f8
PNA		 9747 } else {
9748 trans->ctx.table->use++;
9749 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9750 }
3b49e2e9
PNA		 9751 nft_trans_destroy(trans);
9752 break;
37082f93 9753 }
37082f93
PNA		 9754 }
9755
b326dd37
PNA		 9756 synchronize_rcu();
9757
a1cee076 9758 list_for_each_entry_safe_reverse(trans, next,
0854db2a 9759 &nft_net->commit_list, list) {
c7c32e72 9760 list_del(&trans->list);
b326dd37 9761 nf_tables_abort_release(trans);
37082f93
PNA		 9762 }
9763
c0391b6a 9764 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 9765 nf_tables_module_autoload(net);
9766 else
9767 nf_tables_module_autoload_cleanup(net);
9768
37082f93
PNA		 9769 return 0;
9770}
9771
c0391b6a
PNA		 9772static int nf_tables_abort(struct net *net, struct sk_buff *skb,
9773 enum nfnl_abort_action action)
71ad00c5 9774{
d59d2f82 9775 struct nftables_pernet *nft_net = nft_pernet(net);
c0391b6a 9776 int ret = __nf_tables_abort(net, action);
f102d66b 9777
0854db2a 9778 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9779
9780 return ret;
71ad00c5
FW		 9781}
9782
74e8bcd2
PNA		 9783static bool nf_tables_valid_genid(struct net *net, u32 genid)
9784{
d59d2f82 9785 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 9786 bool genid_ok;
9787
0854db2a 9788 mutex_lock(&nft_net->commit_mutex);
f102d66b 9789
0854db2a 9790 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 9791 if (!genid_ok)
0854db2a 9792 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9793
9794 /* else, commit mutex has to be released by commit or abort function */
9795 return genid_ok;
74e8bcd2
PNA		 9796}
9797
96518518
PM		 9798static const struct nfnetlink_subsystem nf_tables_subsys = {
9799 .name = "nf_tables",
9800 .subsys_id = NFNL_SUBSYS_NFTABLES,
9801 .cb_count = NFT_MSG_MAX,
9802 .cb = nf_tables_cb,
0628b123
PNA		 9803 .commit = nf_tables_commit,
9804 .abort = nf_tables_abort,
74e8bcd2 9805 .valid_genid = nf_tables_valid_genid,
be2ab5b4 9806 .owner = THIS_MODULE,
96518518
PM		 9807};
9808
7210e4e3 9809int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 9810 enum nft_chain_types type)
7210e4e3
PNA		 9811{
9812 const struct nft_base_chain *basechain;
9813
f323d954 9814 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 9815 basechain = nft_base_chain(chain);
9816 if (basechain->type->type != type)
9817 return -EOPNOTSUPP;
9818 }
9819 return 0;
9820}
9821EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
9822
75e8d06d
PNA		 9823int nft_chain_validate_hooks(const struct nft_chain *chain,
9824 unsigned int hook_flags)
9825{
9826 struct nft_base_chain *basechain;
9827
f323d954 9828 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 9829 basechain = nft_base_chain(chain);
9830
c974a3a3 9831 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 9832 return 0;
9833
9834 return -EOPNOTSUPP;
9835 }
9836
9837 return 0;
9838}
9839EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
9840
20a69341
PM		 9841/*
9842 * Loop detection - walk through the ruleset beginning at the destination chain
9843 * of a new jump until either the source chain is reached (loop) or all
9844 * reachable chains have been traversed.
9845 *
9846 * The loop check is performed whenever a new jump verdict is added to an
9847 * expression or verdict map or a verdict map is bound to a new chain.
9848 */
9849
9850static int nf_tables_check_loops(const struct nft_ctx *ctx,
9851 const struct nft_chain *chain);
9852
6387aa6e
PNA		 9853static int nft_check_loops(const struct nft_ctx *ctx,
9854 const struct nft_set_ext *ext)
9855{
9856 const struct nft_data *data;
9857 int ret;
9858
9859 data = nft_set_ext_data(ext);
9860 switch (data->verdict.code) {
9861 case NFT_JUMP:
9862 case NFT_GOTO:
9863 ret = nf_tables_check_loops(ctx, data->verdict.chain);
9864 break;
9865 default:
9866 ret = 0;
9867 break;
9868 }
9869
9870 return ret;
9871}
9872
20a69341 9873static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 9874 struct nft_set *set,
20a69341 9875 const struct nft_set_iter *iter,
de70185d 9876 struct nft_set_elem *elem)
20a69341 9877{
fe2811eb 9878 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
fe2811eb
PM		 9879
9880 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
9881 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 9882 return 0;
9883
6387aa6e 9884 return nft_check_loops(ctx, ext);
20a69341
PM		 9885}
9886
aaa31047
PNA		 9887static int nft_set_catchall_loops(const struct nft_ctx *ctx,
9888 struct nft_set *set)
9889{
9890 u8 genmask = nft_genmask_next(ctx->net);
9891 struct nft_set_elem_catchall *catchall;
9892 struct nft_set_ext *ext;
9893 int ret = 0;
9894
9895 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9896 ext = nft_set_elem_ext(set, catchall->elem);
9897 if (!nft_set_elem_active(ext, genmask))
9898 continue;
9899
9900 ret = nft_check_loops(ctx, ext);
9901 if (ret < 0)
9902 return ret;
9903 }
9904
9905 return ret;
9906}
9907
20a69341
PM		 9908static int nf_tables_check_loops(const struct nft_ctx *ctx,
9909 const struct nft_chain *chain)
9910{
9911 const struct nft_rule *rule;
9912 const struct nft_expr *expr, *last;
de70185d 9913 struct nft_set *set;
20a69341
PM		 9914 struct nft_set_binding *binding;
9915 struct nft_set_iter iter;
20a69341
PM		 9916
9917 if (ctx->chain == chain)
9918 return -ELOOP;
9919
9920 list_for_each_entry(rule, &chain->rules, list) {
9921 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 9922 struct nft_immediate_expr *priv;
9923 const struct nft_data *data;
0ca743a5
PNA		 9924 int err;
9925
a654de8f 9926 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 9927 continue;
9928
a654de8f
PNA		 9929 priv = nft_expr_priv(expr);
9930 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 9931 continue;
20a69341 9932
a654de8f 9933 data = &priv->data;
1ca2e170 9934 switch (data->verdict.code) {
20a69341
PM		 9935 case NFT_JUMP:
9936 case NFT_GOTO:
1ca2e170
PM		 9937 err = nf_tables_check_loops(ctx,
9938 data->verdict.chain);
20a69341
PM		 9939 if (err < 0)
9940 return err;
c2168e6b 9941 break;
20a69341
PM		 9942 default:
9943 break;
9944 }
9945 }
9946 }
9947
9948 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 9949 if (!nft_is_active_next(ctx->net, set))
9950 continue;
20a69341
PM		 9951 if (!(set->flags & NFT_SET_MAP) ||
9952 set->dtype != NFT_DATA_VERDICT)
9953 continue;
9954
9955 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 9956 if (!(binding->flags & NFT_SET_MAP) ||
9957 binding->chain != chain)
20a69341
PM		 9958 continue;
9959
8588ac09 9960 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 9961 iter.skip = 0;
9962 iter.count = 0;
9963 iter.err = 0;
9964 iter.fn = nf_tables_loop_check_setelem;
9965
9966 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 9967 if (!iter.err)
9968 iter.err = nft_set_catchall_loops(ctx, set);
9969
20a69341
PM		 9970 if (iter.err < 0)
9971 return iter.err;
9972 }
9973 }
9974
9975 return 0;
9976}
9977
36b701fa
LGL		 9978/**
9979 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
9980 *
9981 * @attr: netlink attribute to fetch value from
9982 * @max: maximum value to be stored in dest
9983 * @dest: pointer to the variable
9984 *
9985 * Parse, check and store a given u32 netlink attribute into variable.
9986 * This function returns -ERANGE if the value goes over maximum value.
9987 * Otherwise a 0 is returned and the attribute value is stored in the
9988 * destination variable.
9989 */
f1d505bb 9990int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 9991{
09525a09 9992 u32 val;
36b701fa
LGL		 9993
9994 val = ntohl(nla_get_be32(attr));
9995 if (val > max)
9996 return -ERANGE;
9997
9998 *dest = val;
9999 return 0;
10000}
10001EXPORT_SYMBOL_GPL(nft_parse_u32_check);
10002
6c6f9f31 10003static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 10004{
49499c3e
PM		 10005 unsigned int reg;
10006
10007 reg = ntohl(nla_get_be32(attr));
10008 switch (reg) {
10009 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 10010 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
10011 break;
10012 case NFT_REG32_00...NFT_REG32_15:
10013 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
10014 break;
49499c3e 10015 default:
6e1acfa3 10016 return -ERANGE;
49499c3e 10017 }
6e1acfa3
PNA		 10018
10019 return 0;
b1c96ed3 10020}
b1c96ed3 10021
49499c3e
PM		 10022/**
10023 * nft_dump_register - dump a register value to a netlink attribute
10024 *
10025 * @skb: socket buffer
10026 * @attr: attribute number
10027 * @reg: register number
10028 *
10029 * Construct a netlink attribute containing the register number. For
10030 * compatibility reasons, register numbers being a multiple of 4 are
10031 * translated to the corresponding 128 bit register numbers.
10032 */
b1c96ed3
PM		 10033int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
10034{
49499c3e
PM		 10035 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
10036 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
10037 else
10038 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
10039
b1c96ed3
PM		 10040 return nla_put_be32(skb, attr, htonl(reg));
10041}
10042EXPORT_SYMBOL_GPL(nft_dump_register);
10043
4f16d25c 10044static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 10045{
49499c3e 10046 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 10047 return -EINVAL;
d07db988
PM		 10048 if (len == 0)
10049 return -EINVAL;
c593642c 10050 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 10051 return -ERANGE;
49499c3e 10052
96518518
PM		 10053 return 0;
10054}
4f16d25c
PNA		 10055
10056int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
10057{
10058 u32 reg;
10059 int err;
10060
6e1acfa3
PNA		 10061 err = nft_parse_register(attr, &reg);
10062 if (err < 0)
10063 return err;
10064
4f16d25c
PNA		 10065 err = nft_validate_register_load(reg, len);
10066 if (err < 0)
10067 return err;
10068
10069 *sreg = reg;
10070 return 0;
10071}
10072EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 10073
345023b0
PNA		 10074static int nft_validate_register_store(const struct nft_ctx *ctx,
10075 enum nft_registers reg,
10076 const struct nft_data *data,
10077 enum nft_data_types type,
10078 unsigned int len)
96518518 10079{
20a69341
PM		 10080 int err;
10081
96518518
PM		 10082 switch (reg) {
10083 case NFT_REG_VERDICT:
58f40ab6 10084 if (type != NFT_DATA_VERDICT)
96518518 10085 return -EINVAL;
20a69341 10086
58f40ab6 10087 if (data != NULL &&
1ca2e170
PM		 10088 (data->verdict.code == NFT_GOTO ||
10089 data->verdict.code == NFT_JUMP)) {
10090 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 10091 if (err < 0)
10092 return err;
20a69341
PM		 10093 }
10094
96518518
PM		 10095 return 0;
10096 default:
49499c3e 10097 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 10098 return -EINVAL;
45d9bcda
PM		 10099 if (len == 0)
10100 return -EINVAL;
49499c3e 10101 if (reg * NFT_REG32_SIZE + len >
c593642c 10102 sizeof_field(struct nft_regs, data))
45d9bcda 10103 return -ERANGE;
27e6d201 10104
96518518
PM		 10105 if (data != NULL && type != NFT_DATA_VALUE)
10106 return -EINVAL;
10107 return 0;
10108 }
10109}
345023b0
PNA		 10110
10111int nft_parse_register_store(const struct nft_ctx *ctx,
10112 const struct nlattr *attr, u8 *dreg,
10113 const struct nft_data *data,
10114 enum nft_data_types type, unsigned int len)
10115{
10116 int err;
10117 u32 reg;
10118
6e1acfa3
PNA		 10119 err = nft_parse_register(attr, &reg);
10120 if (err < 0)
10121 return err;
10122
345023b0
PNA		 10123 err = nft_validate_register_store(ctx, reg, data, type, len);
10124 if (err < 0)
10125 return err;
10126
10127 *dreg = reg;
10128 return 0;
10129}
10130EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 10131
10132static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
10133 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
10134 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
10135 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 10136 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 10137};
10138
10139static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
10140 struct nft_data_desc *desc, const struct nlattr *nla)
10141{
664b0f8c 10142 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 10143 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
10144 struct nft_chain *chain;
10145 int err;
10146
8cb08174
JB		 10147 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
10148 nft_verdict_policy, NULL);
96518518
PM		 10149 if (err < 0)
10150 return err;
10151
10152 if (!tb[NFTA_VERDICT_CODE])
10153 return -EINVAL;
1ca2e170 10154 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 10155
1ca2e170 10156 switch (data->verdict.code) {
e0abdadc 10157 default:
1ca2e170 10158 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 10159 case NF_ACCEPT:
10160 case NF_DROP:
10161 case NF_QUEUE:
10162 break;
10163 default:
10164 return -EINVAL;
10165 }
954d8297 10166 fallthrough;
96518518
PM		 10167 case NFT_CONTINUE:
10168 case NFT_BREAK:
10169 case NFT_RETURN:
96518518
PM		 10170 break;
10171 case NFT_JUMP:
10172 case NFT_GOTO:
51d70f18
PNA		 10173 if (tb[NFTA_VERDICT_CHAIN]) {
10174 chain = nft_chain_lookup(ctx->net, ctx->table,
10175 tb[NFTA_VERDICT_CHAIN],
10176 genmask);
10177 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 10178 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
51d70f18
PNA		 10179 tb[NFTA_VERDICT_CHAIN_ID]);
10180 if (IS_ERR(chain))
10181 return PTR_ERR(chain);
10182 } else {
96518518 10183 return -EINVAL;
51d70f18
PNA		 10184 }
10185
96518518
PM		 10186 if (IS_ERR(chain))
10187 return PTR_ERR(chain);
f323d954 10188 if (nft_is_base_chain(chain))
96518518 10189 return -EOPNOTSUPP;
e02f0d39
PNA		 10190 if (nft_chain_is_bound(chain))
10191 return -EINVAL;
f323ef3a
PNA		 10192 if (desc->flags & NFT_DATA_DESC_SETELEM &&
10193 chain->flags & NFT_CHAIN_BINDING)
10194 return -EINVAL;
96518518 10195
96518518 10196 chain->use++;
1ca2e170 10197 data->verdict.chain = chain;
96518518 10198 break;
96518518
PM		 10199 }
10200
4c4ed074 10201 desc->len = sizeof(data->verdict);
341b6941 10202
96518518
PM		 10203 return 0;
10204}
10205
10206static void nft_verdict_uninit(const struct nft_data *data)
10207{
d0e2c7de
PNA		 10208 struct nft_chain *chain;
10209 struct nft_rule *rule;
10210
1ca2e170 10211 switch (data->verdict.code) {
96518518
PM		 10212 case NFT_JUMP:
10213 case NFT_GOTO:
d0e2c7de
PNA		 10214 chain = data->verdict.chain;
10215 chain->use--;
10216
10217 if (!nft_chain_is_bound(chain))
10218 break;
10219
10220 chain->table->use--;
10221 list_for_each_entry(rule, &chain->rules, list)
10222 chain->use--;
10223
10224 nft_chain_del(chain);
96518518
PM		 10225 break;
10226 }
10227}
10228
33d5a7b1 10229int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 10230{
10231 struct nlattr *nest;
10232
ae0be8de 10233 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 10234 if (!nest)
10235 goto nla_put_failure;
10236
33d5a7b1 10237 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 10238 goto nla_put_failure;
10239
33d5a7b1 10240 switch (v->code) {
96518518
PM		 10241 case NFT_JUMP:
10242 case NFT_GOTO:
1ca2e170 10243 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 10244 v->chain->name))
96518518
PM		 10245 goto nla_put_failure;
10246 }
10247 nla_nest_end(skb, nest);
10248 return 0;
10249
10250nla_put_failure:
10251 return -1;
10252}
10253
d0a11fc3 10254static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 10255 struct nft_data *data, struct nft_data_desc *desc,
10256 const struct nlattr *nla)
96518518
PM		 10257{
10258 unsigned int len;
10259
10260 len = nla_len(nla);
10261 if (len == 0)
10262 return -EINVAL;
341b6941 10263 if (len > desc->size)
96518518 10264 return -EOVERFLOW;
341b6941
PNA		 10265 if (desc->len) {
10266 if (len != desc->len)
10267 return -EINVAL;
10268 } else {
10269 desc->len = len;
10270 }
96518518 10271
d0a11fc3 10272 nla_memcpy(data->data, nla, len);
341b6941 10273
96518518
PM		 10274 return 0;
10275}
10276
10277static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
10278 unsigned int len)
10279{
10280 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
10281}
10282
10283static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 10284 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 10285 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
10286};
10287
10288/**
10289 * nft_data_init - parse nf_tables data netlink attributes
10290 *
10291 * @ctx: context of the expression using the data
10292 * @data: destination struct nft_data
10293 * @desc: data description
10294 * @nla: netlink attribute containing data
10295 *
10296 * Parse the netlink data attributes and initialize a struct nft_data.
10297 * The type and length of data are returned in the data description.
10298 *
10299 * The caller can indicate that it only wants to accept data of type
10300 * NFT_DATA_VALUE by passing NULL for the ctx argument.
10301 */
341b6941 10302int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 10303 struct nft_data_desc *desc, const struct nlattr *nla)
10304{
10305 struct nlattr *tb[NFTA_DATA_MAX + 1];
10306 int err;
10307
341b6941
PNA		 10308 if (WARN_ON_ONCE(!desc->size))
10309 return -EINVAL;
10310
8cb08174
JB		 10311 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
10312 nft_data_policy, NULL);
96518518
PM		 10313 if (err < 0)
10314 return err;
10315
341b6941
PNA		 10316 if (tb[NFTA_DATA_VALUE]) {
10317 if (desc->type != NFT_DATA_VALUE)
10318 return -EINVAL;
10319
10320 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
10321 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
10322 if (desc->type != NFT_DATA_VERDICT)
10323 return -EINVAL;
10324
10325 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
10326 } else {
10327 err = -EINVAL;
10328 }
10329
10330 return err;
96518518
PM		 10331}
10332EXPORT_SYMBOL_GPL(nft_data_init);
10333
10334/**
59105446 10335 * nft_data_release - release a nft_data item
96518518
PM		 10336 *
10337 * @data: struct nft_data to release
10338 * @type: type of data
10339 *
10340 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
10341 * all others need to be released by calling this function.
10342 */
59105446 10343void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 10344{
960bd2c2 10345 if (type < NFT_DATA_VERDICT)
96518518 10346 return;
960bd2c2 10347 switch (type) {
96518518
PM		 10348 case NFT_DATA_VERDICT:
10349 return nft_verdict_uninit(data);
10350 default:
10351 WARN_ON(1);
10352 }
10353}
59105446 10354EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 10355
10356int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
10357 enum nft_data_types type, unsigned int len)
10358{
10359 struct nlattr *nest;
10360 int err;
10361
ae0be8de 10362 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 10363 if (nest == NULL)
10364 return -1;
10365
10366 switch (type) {
10367 case NFT_DATA_VALUE:
10368 err = nft_value_dump(skb, data, len);
10369 break;
10370 case NFT_DATA_VERDICT:
33d5a7b1 10371 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 10372 break;
10373 default:
10374 err = -EINVAL;
10375 WARN_ON(1);
10376 }
10377
10378 nla_nest_end(skb, nest);
10379 return err;
10380}
10381EXPORT_SYMBOL_GPL(nft_data_dump);
10382
5ebe0b0e
PNA		 10383int __nft_release_basechain(struct nft_ctx *ctx)
10384{
10385 struct nft_rule *rule, *nr;
10386
fa5950e4
FW		 10387 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
10388 return 0;
5ebe0b0e 10389
c974a3a3 10390 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 10391 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
10392 list_del(&rule->list);
10393 ctx->chain->use--;
bb7b40ae 10394 nf_tables_rule_release(ctx, rule);
5ebe0b0e 10395 }
1b2470e5 10396 nft_chain_del(ctx->chain);
5ebe0b0e 10397 ctx->table->use--;
43a605f2 10398 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 10399
10400 return 0;
10401}
10402EXPORT_SYMBOL_GPL(__nft_release_basechain);
10403
00dfe9be
PNA		 10404static void __nft_release_hook(struct net *net, struct nft_table *table)
10405{
6069da44 10406 struct nft_flowtable *flowtable;
00dfe9be
PNA		 10407 struct nft_chain *chain;
10408
10409 list_for_each_entry(chain, &table->chains, list)
f9a43007 10410 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 10411 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 10412 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
10413 true);
00dfe9be
PNA		 10414}
10415
767d1216
PNA		 10416static void __nft_release_hooks(struct net *net)
10417{
d59d2f82 10418 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 10419 struct nft_table *table;
767d1216 10420
0854db2a 10421 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 10422 if (nft_table_has_owner(table))
10423 continue;
10424
00dfe9be 10425 __nft_release_hook(net, table);
2888b080 10426 }
767d1216
PNA		 10427}
10428
fd020332 10429static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 10430{
3b49e2e9 10431 struct nft_flowtable *flowtable, *nf;
df05ef87 10432 struct nft_chain *chain, *nc;
e5009240 10433 struct nft_object *obj, *ne;
df05ef87
PNA		 10434 struct nft_rule *rule, *nr;
10435 struct nft_set *set, *ns;
10436 struct nft_ctx ctx = {
10437 .net = net,
43a605f2 10438 .family = NFPROTO_NETDEV,
df05ef87
PNA		 10439 };
10440
fd020332
PNA		 10441 ctx.family = table->family;
10442 ctx.table = table;
10443 list_for_each_entry(chain, &table->chains, list) {
10444 ctx.chain = chain;
10445 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
10446 list_del(&rule->list);
10447 chain->use--;
10448 nf_tables_rule_release(&ctx, rule);
df05ef87 10449 }
df05ef87 10450 }
fd020332
PNA		 10451 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
10452 list_del(&flowtable->list);
10453 table->use--;
10454 nf_tables_flowtable_destroy(flowtable);
10455 }
10456 list_for_each_entry_safe(set, ns, &table->sets, list) {
10457 list_del(&set->list);
10458 table->use--;
10459 nft_set_destroy(&ctx, set);
10460 }
10461 list_for_each_entry_safe(obj, ne, &table->objects, list) {
10462 nft_obj_del(obj);
10463 table->use--;
10464 nft_obj_destroy(&ctx, obj);
10465 }
10466 list_for_each_entry_safe(chain, nc, &table->chains, list) {
10467 ctx.chain = chain;
10468 nft_chain_del(chain);
10469 table->use--;
10470 nf_tables_chain_destroy(&ctx);
10471 }
fd020332
PNA		 10472 nf_tables_table_destroy(&ctx);
10473}
10474
bd1777b3 10475static void __nft_release_tables(struct net *net)
fd020332 10476{
d59d2f82 10477 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 10478 struct nft_table *table, *nt;
10479
0854db2a 10480 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 10481 if (nft_table_has_owner(table))
6001a930
PNA		 10482 continue;
10483
a499b03b
FW		 10484 list_del(&table->list);
10485
fd020332 10486 __nft_release_table(net, table);
6001a930
PNA		 10487 }
10488}
10489
10490static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
10491 void *ptr)
10492{
a499b03b 10493 struct nft_table *table, *to_delete[8];
0854db2a 10494 struct nftables_pernet *nft_net;
6001a930 10495 struct netlink_notify *n = ptr;
6001a930 10496 struct net *net = n->net;
a499b03b
FW		 10497 unsigned int deleted;
10498 bool restart = false;
6001a930
PNA		 10499
10500 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
10501 return NOTIFY_DONE;
10502
d59d2f82 10503 nft_net = nft_pernet(net);
a499b03b 10504 deleted = 0;
0854db2a 10505 mutex_lock(&nft_net->commit_mutex);
d4bc8271
PNA		 10506 if (!list_empty(&nf_tables_destroy_list))
10507 rcu_barrier();
a499b03b 10508again:
0854db2a 10509 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 10510 if (nft_table_has_owner(table) &&
10511 n->portid == table->nlpid) {
10512 __nft_release_hook(net, table);
a499b03b
FW		 10513 list_del_rcu(&table->list);
10514 to_delete[deleted++] = table;
10515 if (deleted >= ARRAY_SIZE(to_delete))
10516 break;
6001a930
PNA		 10517 }
10518 }
a499b03b
FW		 10519 if (deleted) {
10520 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 10521 synchronize_rcu();
a499b03b
FW		 10522 while (deleted)
10523 __nft_release_table(net, to_delete[--deleted]);
10524
10525 if (restart)
10526 goto again;
6001a930 10527 }
0854db2a 10528 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 10529
10530 return NOTIFY_DONE;
df05ef87
PNA		 10531}
10532
6001a930
PNA		 10533static struct notifier_block nft_nl_notifier = {
10534 .notifier_call = nft_rcv_nl_event,
10535};
10536
dd4cbef7
PNA		 10537static int __net_init nf_tables_init_net(struct net *net)
10538{
d59d2f82 10539 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10540
10541 INIT_LIST_HEAD(&nft_net->tables);
10542 INIT_LIST_HEAD(&nft_net->commit_list);
10543 INIT_LIST_HEAD(&nft_net->module_list);
10544 INIT_LIST_HEAD(&nft_net->notify_list);
10545 mutex_init(&nft_net->commit_mutex);
10546 nft_net->base_seq = 1;
a654de8f 10547
dd4cbef7
PNA		 10548 return 0;
10549}
10550
767d1216
PNA		 10551static void __net_exit nf_tables_pre_exit_net(struct net *net)
10552{
3923b1e4
PNA		 10553 struct nftables_pernet *nft_net = nft_pernet(net);
10554
10555 mutex_lock(&nft_net->commit_mutex);
767d1216 10556 __nft_release_hooks(net);
3923b1e4 10557 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 10558}
10559
dd4cbef7
PNA		 10560static void __net_exit nf_tables_exit_net(struct net *net)
10561{
d59d2f82 10562 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10563
10564 mutex_lock(&nft_net->commit_mutex);
03c1f1ef
SY		 10565 if (!list_empty(&nft_net->commit_list) ||
10566 !list_empty(&nft_net->module_list))
c0391b6a 10567 __nf_tables_abort(net, NFNL_ABORT_NONE);
bd1777b3 10568 __nft_release_tables(net);
0854db2a
FW		 10569 mutex_unlock(&nft_net->commit_mutex);
10570 WARN_ON_ONCE(!list_empty(&nft_net->tables));
10571 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
10572 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 10573}
10574
99633ab2 10575static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 10576 .init = nf_tables_init_net,
10577 .pre_exit = nf_tables_pre_exit_net,
10578 .exit = nf_tables_exit_net,
0854db2a
FW		 10579 .id = &nf_tables_net_id,
10580 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 10581};
10582
96518518
PM		 10583static int __init nf_tables_module_init(void)
10584{
10585 int err;
10586
d209df3e
FW		 10587 err = register_pernet_subsys(&nf_tables_net_ops);
10588 if (err < 0)
10589 return err;
10590
10591 err = nft_chain_filter_init();
10592 if (err < 0)
6001a930 10593 goto err_chain_filter;
02c7b25e 10594
96518518
PM		 10595 err = nf_tables_core_module_init();
10596 if (err < 0)
6001a930 10597 goto err_core_module;
96518518 10598
d209df3e 10599 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 10600 if (err < 0)
6001a930 10601 goto err_netdev_notifier;
96518518 10602
4d44175a
FW		 10603 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
10604 if (err < 0)
6001a930 10605 goto err_rht_objname;
4d44175a 10606
06d392cb 10607 err = nft_offload_init();
10608 if (err < 0)
6001a930
PNA		 10609 goto err_offload;
10610
10611 err = netlink_register_notifier(&nft_nl_notifier);
10612 if (err < 0)
10613 goto err_netlink_notifier;
06d392cb 10614
d209df3e
FW		 10615 /* must be last */
10616 err = nfnetlink_subsys_register(&nf_tables_subsys);
10617 if (err < 0)
6001a930 10618 goto err_nfnl_subsys;
3b49e2e9 10619
c1deb065 10620 nft_chain_route_init();
3474a2c6 10621
d209df3e 10622 return err;
6001a930
PNA		 10623
10624err_nfnl_subsys:
10625 netlink_unregister_notifier(&nft_nl_notifier);
10626err_netlink_notifier:
06d392cb 10627 nft_offload_exit();
6001a930 10628err_offload:
4d44175a 10629 rhltable_destroy(&nft_objname_ht);
6001a930 10630err_rht_objname:
d209df3e 10631 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 10632err_netdev_notifier:
96518518 10633 nf_tables_core_module_exit();
6001a930 10634err_core_module:
d209df3e 10635 nft_chain_filter_fini();
6001a930 10636err_chain_filter:
d209df3e 10637 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 10638 return err;
10639}
10640
10641static void __exit nf_tables_module_exit(void)
10642{
10643 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 10644 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 10645 nft_offload_exit();
3b49e2e9 10646 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 10647 nft_chain_filter_fini();
c1deb065 10648 nft_chain_route_fini();
71ad00c5 10649 unregister_pernet_subsys(&nf_tables_net_ops);
0935d558 10650 cancel_work_sync(&trans_destroy_work);
1b1bc49c 10651 rcu_barrier();
4d44175a 10652 rhltable_destroy(&nft_objname_ht);
96518518 10653 nf_tables_core_module_exit();
96518518
PM		 10654}
10655
10656module_init(nf_tables_module_init);
10657module_exit(nf_tables_module_exit);
10658
10659MODULE_LICENSE("GPL");
10660MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
10661MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
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