projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
netfilter: conntrack: fix ipv6 exthdr error check
[linux-block.git] / net / netfilter / nf_tables_api.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
96518518 2/*
20a69341 3 * Copyright (c) 2007-2009 Patrick McHardy <kaber@trash.net>
96518518 4 *
96518518
PM		 5 * Development of this code funded by Astaro AG (http://www.astaro.com/)
6 */
7
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/list.h>
11#include <linux/skbuff.h>
12#include <linux/netlink.h>
1ff75a3e 13#include <linux/vmalloc.h>
0eb71a9d 14#include <linux/rhashtable.h>
8e6cf365 15#include <linux/audit.h>
96518518
PM		 16#include <linux/netfilter.h>
17#include <linux/netfilter/nfnetlink.h>
18#include <linux/netfilter/nf_tables.h>
3b49e2e9 19#include <net/netfilter/nf_flow_table.h>
96518518
PM		 20#include <net/netfilter/nf_tables_core.h>
21#include <net/netfilter/nf_tables.h>
c9626a2c 22#include <net/netfilter/nf_tables_offload.h>
99633ab2 23#include <net/net_namespace.h>
96518518
PM		 24#include <net/sock.h>
25
9332d27d
FW		 26#define NFT_MODULE_AUTOLOAD_LIMIT (MODULE_NAME_LEN - sizeof("nft-expr-255-"))
27
0854db2a
FW		 28unsigned int nf_tables_net_id __read_mostly;
29
96518518 30static LIST_HEAD(nf_tables_expressions);
e5009240 31static LIST_HEAD(nf_tables_objects);
3b49e2e9 32static LIST_HEAD(nf_tables_flowtables);
0935d558
FW		 33static LIST_HEAD(nf_tables_destroy_list);
34static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
96518518 35
a654de8f
PNA		 36enum {
37 NFT_VALIDATE_SKIP = 0,
38 NFT_VALIDATE_NEED,
39 NFT_VALIDATE_DO,
40};
41
4d44175a
FW		 42static struct rhltable nft_objname_ht;
43
1b2470e5
FW		 44static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
45static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
46static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
47
4d44175a
FW		 48static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
49static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
50static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
51
1b2470e5
FW		 52static const struct rhashtable_params nft_chain_ht_params = {
53 .head_offset = offsetof(struct nft_chain, rhlhead),
54 .key_offset = offsetof(struct nft_chain, name),
55 .hashfn = nft_chain_hash,
56 .obj_hashfn = nft_chain_hash_obj,
57 .obj_cmpfn = nft_chain_hash_cmp,
1b2470e5
FW		 58 .automatic_shrinking = true,
59};
60
4d44175a
FW		 61static const struct rhashtable_params nft_objname_ht_params = {
62 .head_offset = offsetof(struct nft_object, rhlhead),
63 .key_offset = offsetof(struct nft_object, key),
64 .hashfn = nft_objname_hash,
65 .obj_hashfn = nft_objname_hash_obj,
66 .obj_cmpfn = nft_objname_hash_cmp,
67 .automatic_shrinking = true,
68};
69
c520292f
RGB		 70struct nft_audit_data {
71 struct nft_table *table;
72 int entries;
73 int op;
74 struct list_head list;
75};
76
77static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
78 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
79 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
80 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
81 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
82 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
83 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
84 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
85 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
86 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
87 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
88 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
89 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
90 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
91 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
92 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
93 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
94 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
95 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
96 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
97 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
99 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
100 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
101 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
102 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
103};
104
a654de8f
PNA		 105static void nft_validate_state_update(struct net *net, u8 new_validate_state)
106{
d59d2f82 107 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 108
109 switch (nft_net->validate_state) {
a654de8f
PNA		 110 case NFT_VALIDATE_SKIP:
111 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
112 break;
113 case NFT_VALIDATE_NEED:
114 break;
115 case NFT_VALIDATE_DO:
116 if (new_validate_state == NFT_VALIDATE_NEED)
117 return;
118 }
119
0854db2a 120 nft_net->validate_state = new_validate_state;
a654de8f 121}
0935d558
FW		 122static void nf_tables_trans_destroy_work(struct work_struct *w);
123static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
a654de8f 124
7c95f6d8 125static void nft_ctx_init(struct nft_ctx *ctx,
633c9a84 126 struct net *net,
7c95f6d8
PNA		 127 const struct sk_buff *skb,
128 const struct nlmsghdr *nlh,
36596dad 129 u8 family,
7c95f6d8
PNA		 130 struct nft_table *table,
131 struct nft_chain *chain,
132 const struct nlattr * const *nla)
133{
633c9a84 134 ctx->net = net;
36596dad 135 ctx->family = family;
26b2f552 136 ctx->level = 0;
128ad332
PNA		 137 ctx->table = table;
138 ctx->chain = chain;
139 ctx->nla = nla;
140 ctx->portid = NETLINK_CB(skb).portid;
141 ctx->report = nlmsg_report(nlh);
c9626a2c 142 ctx->flags = nlh->nlmsg_flags;
128ad332 143 ctx->seq = nlh->nlmsg_seq;
7c95f6d8
PNA		 144}
145
8411b644
PNA		 146static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
147 int msg_type, u32 size, gfp_t gfp)
1081d11b
PNA		 148{
149 struct nft_trans *trans;
150
8411b644 151 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
1081d11b
PNA		 152 if (trans == NULL)
153 return NULL;
154
58007785 155 INIT_LIST_HEAD(&trans->list);
b380e5c7 156 trans->msg_type = msg_type;
1081d11b
PNA		 157 trans->ctx = *ctx;
158
159 return trans;
160}
161
8411b644
PNA		 162static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
163 int msg_type, u32 size)
164{
165 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
166}
167
1081d11b
PNA		 168static void nft_trans_destroy(struct nft_trans *trans)
169{
170 list_del(&trans->list);
171 kfree(trans);
172}
173
f6ac8585
PNA		 174static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
175{
0854db2a 176 struct nftables_pernet *nft_net;
f6ac8585
PNA		 177 struct net *net = ctx->net;
178 struct nft_trans *trans;
179
180 if (!nft_set_is_anonymous(set))
181 return;
182
d59d2f82 183 nft_net = nft_pernet(net);
0854db2a 184 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
6a0a8d10
PNA		 185 switch (trans->msg_type) {
186 case NFT_MSG_NEWSET:
187 if (nft_trans_set(trans) == set)
188 nft_trans_set_bound(trans) = true;
189 break;
190 case NFT_MSG_NEWSETELEM:
191 if (nft_trans_elem_set(trans) == set)
192 nft_trans_elem_set_bound(trans) = true;
f6ac8585
PNA		 193 break;
194 }
195 }
196}
197
d54725cd
PNA		 198static int nft_netdev_register_hooks(struct net *net,
199 struct list_head *hook_list)
200{
201 struct nft_hook *hook;
202 int err, j;
203
204 j = 0;
205 list_for_each_entry(hook, hook_list, list) {
206 err = nf_register_net_hook(net, &hook->ops);
207 if (err < 0)
208 goto err_register;
209
210 j++;
211 }
212 return 0;
213
214err_register:
215 list_for_each_entry(hook, hook_list, list) {
216 if (j-- <= 0)
217 break;
218
219 nf_unregister_net_hook(net, &hook->ops);
220 }
221 return err;
222}
223
224static void nft_netdev_unregister_hooks(struct net *net,
f9a43007
PNA		 225 struct list_head *hook_list,
226 bool release_netdev)
d54725cd 227{
f9a43007 228 struct nft_hook *hook, *next;
d54725cd 229
f9a43007 230 list_for_each_entry_safe(hook, next, hook_list, list) {
d54725cd 231 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 232 if (release_netdev) {
233 list_del(&hook->list);
234 kfree_rcu(hook, rcu);
235 }
236 }
d54725cd
PNA		 237}
238
c974a3a3
PNA		 239static int nf_tables_register_hook(struct net *net,
240 const struct nft_table *table,
241 struct nft_chain *chain)
d8ee8f7c 242{
d54725cd 243 struct nft_base_chain *basechain;
a37061a6 244 const struct nf_hook_ops *ops;
ae6153b5 245
d8ee8f7c 246 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 247 !nft_is_base_chain(chain))
d8ee8f7c
PNA		 248 return 0;
249
4e25ceb8
FW		 250 basechain = nft_base_chain(chain);
251 ops = &basechain->ops;
ae6153b5 252
4e25ceb8
FW		 253 if (basechain->type->ops_register)
254 return basechain->type->ops_register(net, ops);
255
d3519cb8 256 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
1e9451cb
FW		 257 return nft_netdev_register_hooks(net, &basechain->hook_list);
258
259 return nf_register_net_hook(net, &basechain->ops);
d8ee8f7c
PNA		 260}
261
f9a43007
PNA		 262static void __nf_tables_unregister_hook(struct net *net,
263 const struct nft_table *table,
264 struct nft_chain *chain,
265 bool release_netdev)
c5598794 266{
d54725cd 267 struct nft_base_chain *basechain;
4e25ceb8
FW		 268 const struct nf_hook_ops *ops;
269
d8ee8f7c 270 if (table->flags & NFT_TABLE_F_DORMANT ||
f323d954 271 !nft_is_base_chain(chain))
d8ee8f7c 272 return;
4e25ceb8
FW		 273 basechain = nft_base_chain(chain);
274 ops = &basechain->ops;
d8ee8f7c 275
4e25ceb8
FW		 276 if (basechain->type->ops_unregister)
277 return basechain->type->ops_unregister(net, ops);
278
d3519cb8 279 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
f9a43007
PNA		 280 nft_netdev_unregister_hooks(net, &basechain->hook_list,
281 release_netdev);
1e9451cb
FW		 282 else
283 nf_unregister_net_hook(net, &basechain->ops);
c5598794
AB		 284}
285
f9a43007
PNA		 286static void nf_tables_unregister_hook(struct net *net,
287 const struct nft_table *table,
288 struct nft_chain *chain)
289{
290 return __nf_tables_unregister_hook(net, table, chain, false);
291}
292
0854db2a
FW		 293static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
294{
d59d2f82 295 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a 296
0854db2a
FW		 297 list_add_tail(&trans->list, &nft_net->commit_list);
298}
299
ee01d542
AB		 300static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
301{
302 struct nft_trans *trans;
303
304 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
305 if (trans == NULL)
306 return -ENOMEM;
307
308 if (msg_type == NFT_MSG_NEWTABLE)
f2a6d766 309 nft_activate_next(ctx->net, ctx->table);
ee01d542 310
0854db2a 311 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 312 return 0;
313}
314
315static int nft_deltable(struct nft_ctx *ctx)
316{
317 int err;
318
319 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
320 if (err < 0)
321 return err;
322
f2a6d766 323 nft_deactivate_next(ctx->net, ctx->table);
ee01d542
AB		 324 return err;
325}
326
66293c46 327static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
ee01d542
AB		 328{
329 struct nft_trans *trans;
330
331 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
332 if (trans == NULL)
66293c46 333 return ERR_PTR(-ENOMEM);
ee01d542 334
74cccc3d 335 if (msg_type == NFT_MSG_NEWCHAIN) {
664b0f8c 336 nft_activate_next(ctx->net, ctx->chain);
ee01d542 337
74cccc3d
PNA		 338 if (ctx->nla[NFTA_CHAIN_ID]) {
339 nft_trans_chain_id(trans) =
340 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
341 }
342 }
343
0854db2a 344 nft_trans_commit_list_add_tail(ctx->net, trans);
66293c46 345 return trans;
ee01d542
AB		 346}
347
348static int nft_delchain(struct nft_ctx *ctx)
349{
66293c46 350 struct nft_trans *trans;
ee01d542 351
66293c46
FW		 352 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
353 if (IS_ERR(trans))
354 return PTR_ERR(trans);
ee01d542
AB		 355
356 ctx->table->use--;
664b0f8c 357 nft_deactivate_next(ctx->net, ctx->chain);
ee01d542 358
66293c46 359 return 0;
ee01d542
AB		 360}
361
bb7b40ae
PNA		 362static void nft_rule_expr_activate(const struct nft_ctx *ctx,
363 struct nft_rule *rule)
364{
365 struct nft_expr *expr;
366
367 expr = nft_expr_first(rule);
31cc578a 368 while (nft_expr_more(rule, expr)) {
bb7b40ae
PNA		 369 if (expr->ops->activate)
370 expr->ops->activate(ctx, expr);
371
372 expr = nft_expr_next(expr);
373 }
374}
375
376static void nft_rule_expr_deactivate(const struct nft_ctx *ctx,
f6ac8585
PNA		 377 struct nft_rule *rule,
378 enum nft_trans_phase phase)
bb7b40ae
PNA		 379{
380 struct nft_expr *expr;
381
382 expr = nft_expr_first(rule);
31cc578a 383 while (nft_expr_more(rule, expr)) {
bb7b40ae 384 if (expr->ops->deactivate)
f6ac8585 385 expr->ops->deactivate(ctx, expr, phase);
bb7b40ae
PNA		 386
387 expr = nft_expr_next(expr);
388 }
389}
390
ee01d542
AB		 391static int
392nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
393{
394 /* You cannot delete the same rule twice */
889f7ee7
PNA		 395 if (nft_is_active_next(ctx->net, rule)) {
396 nft_deactivate_next(ctx->net, rule);
ee01d542
AB		 397 ctx->chain->use--;
398 return 0;
399 }
400 return -ENOENT;
401}
402
403static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
404 struct nft_rule *rule)
405{
406 struct nft_trans *trans;
407
408 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
409 if (trans == NULL)
410 return NULL;
411
1a94e38d
PNA		 412 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
413 nft_trans_rule_id(trans) =
414 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
415 }
ee01d542 416 nft_trans_rule(trans) = rule;
0854db2a 417 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 418
419 return trans;
420}
421
422static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
423{
63b48c73 424 struct nft_flow_rule *flow;
ee01d542
AB		 425 struct nft_trans *trans;
426 int err;
427
428 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
429 if (trans == NULL)
430 return -ENOMEM;
431
63b48c73
PNA		 432 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
433 flow = nft_flow_rule_create(ctx->net, rule);
434 if (IS_ERR(flow)) {
435 nft_trans_destroy(trans);
436 return PTR_ERR(flow);
437 }
438
439 nft_trans_flow_rule(trans) = flow;
440 }
441
ee01d542
AB		 442 err = nf_tables_delrule_deactivate(ctx, rule);
443 if (err < 0) {
444 nft_trans_destroy(trans);
445 return err;
446 }
f6ac8585 447 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
ee01d542
AB		 448
449 return 0;
450}
451
452static int nft_delrule_by_chain(struct nft_ctx *ctx)
453{
454 struct nft_rule *rule;
455 int err;
456
457 list_for_each_entry(rule, &ctx->chain->rules, list) {
23b7ca4f
PNA		 458 if (!nft_is_active_next(ctx->net, rule))
459 continue;
460
ee01d542
AB		 461 err = nft_delrule(ctx, rule);
462 if (err < 0)
463 return err;
464 }
465 return 0;
466}
467
cd5125d8 468static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
ee01d542
AB		 469 struct nft_set *set)
470{
471 struct nft_trans *trans;
472
473 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
474 if (trans == NULL)
475 return -ENOMEM;
476
477 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] != NULL) {
478 nft_trans_set_id(trans) =
479 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
37a9cc52 480 nft_activate_next(ctx->net, set);
ee01d542
AB		 481 }
482 nft_trans_set(trans) = set;
0854db2a 483 nft_trans_commit_list_add_tail(ctx->net, trans);
ee01d542
AB		 484
485 return 0;
486}
487
cd5125d8 488static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
ee01d542
AB		 489{
490 int err;
491
492 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
493 if (err < 0)
494 return err;
495
37a9cc52 496 nft_deactivate_next(ctx->net, set);
ee01d542
AB		 497 ctx->table->use--;
498
499 return err;
500}
501
e5009240
PNA		 502static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
503 struct nft_object *obj)
504{
505 struct nft_trans *trans;
506
507 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
508 if (trans == NULL)
509 return -ENOMEM;
510
511 if (msg_type == NFT_MSG_NEWOBJ)
512 nft_activate_next(ctx->net, obj);
513
514 nft_trans_obj(trans) = obj;
0854db2a 515 nft_trans_commit_list_add_tail(ctx->net, trans);
e5009240
PNA		 516
517 return 0;
518}
519
520static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
521{
522 int err;
523
524 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
525 if (err < 0)
526 return err;
527
528 nft_deactivate_next(ctx->net, obj);
529 ctx->table->use--;
530
531 return err;
532}
533
3b49e2e9
PNA		 534static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
535 struct nft_flowtable *flowtable)
536{
537 struct nft_trans *trans;
538
539 trans = nft_trans_alloc(ctx, msg_type,
540 sizeof(struct nft_trans_flowtable));
541 if (trans == NULL)
542 return -ENOMEM;
543
544 if (msg_type == NFT_MSG_NEWFLOWTABLE)
545 nft_activate_next(ctx->net, flowtable);
546
2c9e4559 547 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
3b49e2e9 548 nft_trans_flowtable(trans) = flowtable;
0854db2a 549 nft_trans_commit_list_add_tail(ctx->net, trans);
3b49e2e9
PNA		 550
551 return 0;
552}
553
554static int nft_delflowtable(struct nft_ctx *ctx,
555 struct nft_flowtable *flowtable)
556{
557 int err;
558
559 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
560 if (err < 0)
561 return err;
562
563 nft_deactivate_next(ctx->net, flowtable);
564 ctx->table->use--;
565
566 return err;
567}
568
34cc9e52
PNA		 569static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
570{
571 int i;
572
573 for (i = track->regs[dreg].num_reg; i > 0; i--)
574 __nft_reg_track_cancel(track, dreg - i);
575}
576
577static void __nft_reg_track_update(struct nft_regs_track *track,
578 const struct nft_expr *expr,
579 u8 dreg, u8 num_reg)
580{
581 track->regs[dreg].selector = expr;
582 track->regs[dreg].bitwise = NULL;
583 track->regs[dreg].num_reg = num_reg;
584}
585
586void nft_reg_track_update(struct nft_regs_track *track,
587 const struct nft_expr *expr, u8 dreg, u8 len)
588{
589 unsigned int regcount;
590 int i;
591
592 __nft_reg_track_clobber(track, dreg);
593
594 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
595 for (i = 0; i < regcount; i++, dreg++)
596 __nft_reg_track_update(track, expr, dreg, i);
597}
598EXPORT_SYMBOL_GPL(nft_reg_track_update);
599
600void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
601{
602 unsigned int regcount;
603 int i;
604
605 __nft_reg_track_clobber(track, dreg);
606
607 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
608 for (i = 0; i < regcount; i++, dreg++)
609 __nft_reg_track_cancel(track, dreg);
610}
611EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
612
613void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
614{
615 track->regs[dreg].selector = NULL;
616 track->regs[dreg].bitwise = NULL;
617 track->regs[dreg].num_reg = 0;
618}
619EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
620
96518518
PM		 621/*
622 * Tables
623 */
624
36596dad 625static struct nft_table *nft_table_lookup(const struct net *net,
f2a6d766 626 const struct nlattr *nla,
6001a930 627 u8 family, u8 genmask, u32 nlpid)
96518518 628{
0854db2a 629 struct nftables_pernet *nft_net;
96518518
PM		 630 struct nft_table *table;
631
cac20fcd
PNA		 632 if (nla == NULL)
633 return ERR_PTR(-EINVAL);
634
d59d2f82 635 nft_net = nft_pernet(net);
0854db2a
FW		 636 list_for_each_entry_rcu(table, &nft_net->tables, list,
637 lockdep_is_held(&nft_net->commit_mutex)) {
f2a6d766 638 if (!nla_strcmp(nla, table->name) &&
98319cb9 639 table->family == family &&
6001a930
PNA		 640 nft_active_genmask(table, genmask)) {
641 if (nft_table_has_owner(table) &&
53479909 642 nlpid && table->nlpid != nlpid)
6001a930
PNA		 643 return ERR_PTR(-EPERM);
644
96518518 645 return table;
6001a930 646 }
96518518 647 }
cac20fcd
PNA		 648
649 return ERR_PTR(-ENOENT);
96518518
PM		 650}
651
3ecbfd65
HS		 652static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
653 const struct nlattr *nla,
e31f072f 654 u8 genmask, u32 nlpid)
3ecbfd65 655{
0854db2a 656 struct nftables_pernet *nft_net;
3ecbfd65
HS		 657 struct nft_table *table;
658
d59d2f82 659 nft_net = nft_pernet(net);
0854db2a 660 list_for_each_entry(table, &nft_net->tables, list) {
3ecbfd65 661 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
e31f072f
PNA		 662 nft_active_genmask(table, genmask)) {
663 if (nft_table_has_owner(table) &&
664 nlpid && table->nlpid != nlpid)
665 return ERR_PTR(-EPERM);
666
3ecbfd65 667 return table;
e31f072f 668 }
3ecbfd65 669 }
3ecbfd65
HS		 670
671 return ERR_PTR(-ENOENT);
672}
673
96518518
PM		 674static inline u64 nf_tables_alloc_handle(struct nft_table *table)
675{
676 return ++table->hgenerator;
677}
678
32537e91 679static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
9370761c 680
82603549
PNA		 681static const struct nft_chain_type *
682__nft_chain_type_get(u8 family, enum nft_chain_types type)
683{
684 if (family >= NFPROTO_NUMPROTO ||
685 type >= NFT_CHAIN_T_MAX)
686 return NULL;
687
688 return chain_type[family][type];
689}
690
32537e91 691static const struct nft_chain_type *
1ea26cca 692__nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
9370761c 693{
82603549 694 const struct nft_chain_type *type;
9370761c
PNA		 695 int i;
696
baae3e62 697 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
82603549
PNA		 698 type = __nft_chain_type_get(family, i);
699 if (!type)
700 continue;
701 if (!nla_strcmp(nla, type->name))
702 return type;
9370761c 703 }
baae3e62 704 return NULL;
9370761c
PNA		 705}
706
eb014de4
PNA		 707struct nft_module_request {
708 struct list_head list;
709 char module[MODULE_NAME_LEN];
710 bool done;
711};
712
452238e8 713#ifdef CONFIG_MODULES
cefa31a9
FW		 714__printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
715 ...)
452238e8
FW		 716{
717 char module_name[MODULE_NAME_LEN];
0854db2a 718 struct nftables_pernet *nft_net;
eb014de4 719 struct nft_module_request *req;
452238e8
FW		 720 va_list args;
721 int ret;
722
452238e8
FW		 723 va_start(args, fmt);
724 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
725 va_end(args);
9332d27d 726 if (ret >= MODULE_NAME_LEN)
eb014de4 727 return 0;
452238e8 728
d59d2f82 729 nft_net = nft_pernet(net);
0854db2a 730 list_for_each_entry(req, &nft_net->module_list, list) {
eb014de4
PNA		 731 if (!strcmp(req->module, module_name)) {
732 if (req->done)
733 return 0;
ec7470b8 734
eb014de4
PNA		 735 /* A request to load this module already exists. */
736 return -EAGAIN;
737 }
738 }
739
740 req = kmalloc(sizeof(*req), GFP_KERNEL);
741 if (!req)
742 return -ENOMEM;
743
744 req->done = false;
8556bceb 745 strscpy(req->module, module_name, MODULE_NAME_LEN);
0854db2a 746 list_add_tail(&req->list, &nft_net->module_list);
eb014de4
PNA		 747
748 return -EAGAIN;
452238e8 749}
cefa31a9 750EXPORT_SYMBOL_GPL(nft_request_module);
452238e8
FW		 751#endif
752
f102d66b
FW		 753static void lockdep_nfnl_nft_mutex_not_held(void)
754{
755#ifdef CONFIG_PROVE_LOCKING
c0700dfa
FW		 756 if (debug_locks)
757 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
f102d66b
FW		 758#endif
759}
760
32537e91 761static const struct nft_chain_type *
452238e8
FW		 762nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
763 u8 family, bool autoload)
9370761c 764{
32537e91 765 const struct nft_chain_type *type;
9370761c 766
1ea26cca 767 type = __nf_tables_chain_type_lookup(nla, family);
93b0806f
PM		 768 if (type != NULL)
769 return type;
f102d66b
FW		 770
771 lockdep_nfnl_nft_mutex_not_held();
9370761c 772#ifdef CONFIG_MODULES
93b0806f 773 if (autoload) {
eb014de4
PNA		 774 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
775 nla_len(nla),
776 (const char *)nla_data(nla)) == -EAGAIN)
93b0806f 777 return ERR_PTR(-EAGAIN);
9370761c
PNA		 778 }
779#endif
93b0806f 780 return ERR_PTR(-ENOENT);
9370761c
PNA		 781}
782
802b8051
PNA		 783static __be16 nft_base_seq(const struct net *net)
784{
d59d2f82 785 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 786
787 return htons(nft_net->base_seq & 0xffff);
802b8051
PNA		 788}
789
96518518 790static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
1cae565e
PNA		 791 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
792 .len = NFT_TABLE_MAXNAMELEN - 1 },
9ddf6323 793 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
3ecbfd65 794 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
7a81575b
JGG		 795 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
796 .len = NFT_USERDATA_MAXLEN }
96518518
PM		 797};
798
84d7fce6
PNA		 799static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
800 u32 portid, u32 seq, int event, u32 flags,
801 int family, const struct nft_table *table)
96518518
PM		 802{
803 struct nlmsghdr *nlh;
96518518 804
dedb67c4 805 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 806 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
807 NFNETLINK_V0, nft_base_seq(net));
808 if (!nlh)
96518518
PM		 809 goto nla_put_failure;
810
9ddf6323 811 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
179d9ba5
PNA		 812 nla_put_be32(skb, NFTA_TABLE_FLAGS,
813 htonl(table->flags & NFT_TABLE_F_MASK)) ||
3ecbfd65
HS		 814 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
815 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
816 NFTA_TABLE_PAD))
96518518 817 goto nla_put_failure;
6001a930
PNA		 818 if (nft_table_has_owner(table) &&
819 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
820 goto nla_put_failure;
96518518 821
7a81575b
JGG		 822 if (table->udata) {
823 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
824 goto nla_put_failure;
825 }
826
053c095a
JB		 827 nlmsg_end(skb, nlh);
828 return 0;
96518518
PM		 829
830nla_put_failure:
831 nlmsg_trim(skb, nlh);
832 return -1;
833}
834
67cc570e
PNA		 835struct nftnl_skb_parms {
836 bool report;
837};
838#define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
839
840static void nft_notify_enqueue(struct sk_buff *skb, bool report,
841 struct list_head *notify_list)
842{
843 NFT_CB(skb).report = report;
844 list_add_tail(&skb->list, notify_list);
845}
846
25e94a99 847static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
96518518 848{
0854db2a 849 struct nftables_pernet *nft_net;
96518518 850 struct sk_buff *skb;
6fb721cf 851 u16 flags = 0;
96518518
PM		 852 int err;
853
128ad332
PNA		 854 if (!ctx->report &&
855 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 856 return;
96518518 857
96518518
PM		 858 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
859 if (skb == NULL)
860 goto err;
861
6fb721cf
PNA		 862 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
863 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
864
84d7fce6 865 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 866 event, flags, ctx->family, ctx->table);
96518518
PM		 867 if (err < 0) {
868 kfree_skb(skb);
869 goto err;
870 }
871
d59d2f82 872 nft_net = nft_pernet(ctx->net);
0854db2a 873 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 874 return;
96518518 875err:
25e94a99 876 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 877}
878
879static int nf_tables_dump_tables(struct sk_buff *skb,
880 struct netlink_callback *cb)
881{
882 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
0854db2a 883 struct nftables_pernet *nft_net;
96518518
PM		 884 const struct nft_table *table;
885 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 886 struct net *net = sock_net(skb->sk);
96518518
PM		 887 int family = nfmsg->nfgen_family;
888
e688a7f8 889 rcu_read_lock();
d59d2f82 890 nft_net = nft_pernet(net);
34002783 891 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 892
0854db2a 893 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 894 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 895 continue;
896
36596dad
PNA		 897 if (idx < s_idx)
898 goto cont;
899 if (idx > s_idx)
900 memset(&cb->args[1], 0,
901 sizeof(cb->args) - sizeof(cb->args[0]));
902 if (!nft_is_active(net, table))
903 continue;
904 if (nf_tables_fill_table_info(skb, net,
905 NETLINK_CB(cb->skb).portid,
906 cb->nlh->nlmsg_seq,
907 NFT_MSG_NEWTABLE, NLM_F_MULTI,
98319cb9 908 table->family, table) < 0)
36596dad
PNA		 909 goto done;
910
911 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 912cont:
36596dad 913 idx++;
96518518
PM		 914 }
915done:
e688a7f8 916 rcu_read_unlock();
96518518
PM		 917 cb->args[0] = idx;
918 return skb->len;
919}
920
d9adf22a
FW		 921static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
922 const struct nlmsghdr *nlh,
923 struct netlink_dump_control *c)
924{
925 int err;
926
927 if (!try_module_get(THIS_MODULE))
928 return -EINVAL;
929
930 rcu_read_unlock();
931 err = netlink_dump_start(nlsk, skb, nlh, c);
932 rcu_read_lock();
933 module_put(THIS_MODULE);
934
935 return err;
936}
937
938/* called with rcu_read_lock held */
797d4980
PNA		 939static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
940 const struct nlattr * const nla[])
96518518 941{
797d4980
PNA		 942 struct netlink_ext_ack *extack = info->extack;
943 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 944 u8 family = info->nfmsg->nfgen_family;
96518518 945 const struct nft_table *table;
797d4980 946 struct net *net = info->net;
96518518 947 struct sk_buff *skb2;
96518518
PM		 948 int err;
949
797d4980 950 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 951 struct netlink_dump_control c = {
952 .dump = nf_tables_dump_tables,
d9adf22a 953 .module = THIS_MODULE,
96518518 954 };
d9adf22a 955
797d4980 956 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 957 }
958
6001a930 959 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
36dd1bcc
PNA		 960 if (IS_ERR(table)) {
961 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
96518518 962 return PTR_ERR(table);
36dd1bcc 963 }
96518518 964
d9adf22a 965 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 966 if (!skb2)
967 return -ENOMEM;
968
84d7fce6 969 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
797d4980
PNA		 970 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
971 0, family, table);
96518518 972 if (err < 0)
ee921183 973 goto err_fill_table_info;
96518518 974
ee921183 975 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 976
ee921183 977err_fill_table_info:
96518518
PM		 978 kfree_skb(skb2);
979 return err;
980}
981
c9c17211 982static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
10435c11
F		 983{
984 struct nft_chain *chain;
985 u32 i = 0;
986
987 list_for_each_entry(chain, &table->chains, list) {
988 if (!nft_is_active_next(net, chain))
989 continue;
f323d954 990 if (!nft_is_base_chain(chain))
10435c11
F		 991 continue;
992
993 if (cnt && i++ == cnt)
994 break;
995
1e9451cb 996 nf_tables_unregister_hook(net, table, chain);
10435c11
F		 997 }
998}
999
c9c17211 1000static int nf_tables_table_enable(struct net *net, struct nft_table *table)
9ddf6323
PNA		 1001{
1002 struct nft_chain *chain;
1003 int err, i = 0;
1004
1005 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1006 if (!nft_is_active_next(net, chain))
1007 continue;
f323d954 1008 if (!nft_is_base_chain(chain))
d2012975
PNA		 1009 continue;
1010
1e9451cb 1011 err = nf_tables_register_hook(net, table, chain);
9ddf6323 1012 if (err < 0)
d54725cd 1013 goto err_register_hooks;
9ddf6323
PNA		 1014
1015 i++;
1016 }
1017 return 0;
d54725cd
PNA		 1018
1019err_register_hooks:
10435c11 1020 if (i)
c9c17211 1021 nft_table_disable(net, table, i);
9ddf6323
PNA		 1022 return err;
1023}
1024
c9c17211 1025static void nf_tables_table_disable(struct net *net, struct nft_table *table)
9ddf6323 1026{
179d9ba5 1027 table->flags &= ~NFT_TABLE_F_DORMANT;
c9c17211 1028 nft_table_disable(net, table, 0);
179d9ba5 1029 table->flags |= NFT_TABLE_F_DORMANT;
9ddf6323
PNA		 1030}
1031
179d9ba5
PNA		 1032#define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1033#define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1034#define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1035#define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1036 __NFT_TABLE_F_WAS_AWAKEN)
0ce7cf41 1037
e1aaca93 1038static int nf_tables_updtable(struct nft_ctx *ctx)
9ddf6323 1039{
55dd6f93 1040 struct nft_trans *trans;
e1aaca93 1041 u32 flags;
179d9ba5 1042 int ret;
9ddf6323 1043
e1aaca93
PNA		 1044 if (!ctx->nla[NFTA_TABLE_FLAGS])
1045 return 0;
9ddf6323 1046
e1aaca93 1047 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1048 if (flags & ~NFT_TABLE_F_MASK)
1049 return -EOPNOTSUPP;
e1aaca93 1050
63283dd2
PNA		 1051 if (flags == ctx->table->flags)
1052 return 0;
1053
9cc0001a
PNA		 1054 if ((nft_table_has_owner(ctx->table) &&
1055 !(flags & NFT_TABLE_F_OWNER)) ||
1056 (!nft_table_has_owner(ctx->table) &&
1057 flags & NFT_TABLE_F_OWNER))
1058 return -EOPNOTSUPP;
1059
55dd6f93
PNA		 1060 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1061 sizeof(struct nft_trans_table));
1062 if (trans == NULL)
1063 return -ENOMEM;
9ddf6323 1064
e1aaca93
PNA		 1065 if ((flags & NFT_TABLE_F_DORMANT) &&
1066 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
179d9ba5
PNA		 1067 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1068 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1069 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
e1aaca93
PNA		 1070 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1071 ctx->table->flags & NFT_TABLE_F_DORMANT) {
179d9ba5
PNA		 1072 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1073 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1074 ret = nf_tables_table_enable(ctx->net, ctx->table);
1075 if (ret < 0)
1076 goto err_register_hooks;
1077
1078 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1079 }
9ddf6323
PNA		 1080 }
1081
55dd6f93 1082 nft_trans_table_update(trans) = true;
0854db2a 1083 nft_trans_commit_list_add_tail(ctx->net, trans);
179d9ba5 1084
55dd6f93 1085 return 0;
179d9ba5
PNA		 1086
1087err_register_hooks:
55dd6f93 1088 nft_trans_destroy(trans);
9ddf6323
PNA		 1089 return ret;
1090}
1091
1b2470e5
FW		 1092static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1093{
1094 const char *name = data;
1095
1096 return jhash(name, strlen(name), seed);
1097}
1098
1099static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1100{
1101 const struct nft_chain *chain = data;
1102
1103 return nft_chain_hash(chain->name, 0, seed);
1104}
1105
1106static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1107 const void *ptr)
1108{
1109 const struct nft_chain *chain = ptr;
1110 const char *name = arg->key;
1111
1112 return strcmp(chain->name, name);
1113}
1114
4d44175a
FW		 1115static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1116{
1117 const struct nft_object_hash_key *k = data;
1118
1119 seed ^= hash_ptr(k->table, 32);
1120
1121 return jhash(k->name, strlen(k->name), seed);
1122}
1123
1124static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1125{
1126 const struct nft_object *obj = data;
1127
1128 return nft_objname_hash(&obj->key, 0, seed);
1129}
1130
1131static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1132 const void *ptr)
1133{
1134 const struct nft_object_hash_key *k = arg->key;
1135 const struct nft_object *obj = ptr;
1136
1137 if (obj->key.table != k->table)
1138 return -1;
1139
1140 return strcmp(obj->key.name, k->name);
1141}
1142
f1082dd3
PS		 1143static bool nft_supported_family(u8 family)
1144{
1145 return false
1146#ifdef CONFIG_NF_TABLES_INET
1147 || family == NFPROTO_INET
1148#endif
1149#ifdef CONFIG_NF_TABLES_IPV4
1150 || family == NFPROTO_IPV4
1151#endif
1152#ifdef CONFIG_NF_TABLES_ARP
1153 || family == NFPROTO_ARP
1154#endif
1155#ifdef CONFIG_NF_TABLES_NETDEV
1156 || family == NFPROTO_NETDEV
1157#endif
1158#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1159 || family == NFPROTO_BRIDGE
1160#endif
1161#ifdef CONFIG_NF_TABLES_IPV6
1162 || family == NFPROTO_IPV6
1163#endif
1164 ;
1165}
1166
7dab8ee3
PNA		 1167static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1168 const struct nlattr * const nla[])
96518518 1169{
7dab8ee3 1170 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 1171 struct netlink_ext_ack *extack = info->extack;
1172 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1173 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1174 struct net *net = info->net;
36dd1bcc
PNA		 1175 const struct nlattr *attr;
1176 struct nft_table *table;
e1aaca93 1177 struct nft_ctx ctx;
7a81575b 1178 u32 flags = 0;
55dd6f93 1179 int err;
96518518 1180
f1082dd3
PS		 1181 if (!nft_supported_family(family))
1182 return -EOPNOTSUPP;
1183
0854db2a 1184 lockdep_assert_held(&nft_net->commit_mutex);
36dd1bcc 1185 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1186 table = nft_table_lookup(net, attr, family, genmask,
1187 NETLINK_CB(skb).portid);
96518518
PM		 1188 if (IS_ERR(table)) {
1189 if (PTR_ERR(table) != -ENOENT)
1190 return PTR_ERR(table);
1a28ad74 1191 } else {
7dab8ee3 1192 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 1193 NL_SET_BAD_ATTR(extack, attr);
96518518 1194 return -EEXIST;
36dd1bcc 1195 }
7dab8ee3 1196 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518 1197 return -EOPNOTSUPP;
e1aaca93 1198
7dab8ee3
PNA		 1199 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1200
e1aaca93 1201 return nf_tables_updtable(&ctx);
96518518
PM		 1202 }
1203
c5c1f975
PM		 1204 if (nla[NFTA_TABLE_FLAGS]) {
1205 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
6001a930
PNA		 1206 if (flags & ~NFT_TABLE_F_MASK)
1207 return -EOPNOTSUPP;
c5c1f975
PM		 1208 }
1209
ffdb210e 1210 err = -ENOMEM;
33758c89 1211 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
ffdb210e 1212 if (table == NULL)
98319cb9 1213 goto err_kzalloc;
96518518 1214
33758c89 1215 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
e46abbcc 1216 if (table->name == NULL)
98319cb9 1217 goto err_strdup;
e46abbcc 1218
7a81575b 1219 if (nla[NFTA_TABLE_USERDATA]) {
33758c89 1220 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
7a81575b
JGG		 1221 if (table->udata == NULL)
1222 goto err_table_udata;
1223
85db827a 1224 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
7a81575b
JGG		 1225 }
1226
1b2470e5
FW		 1227 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1228 if (err)
1229 goto err_chain_ht;
1230
96518518 1231 INIT_LIST_HEAD(&table->chains);
20a69341 1232 INIT_LIST_HEAD(&table->sets);
e5009240 1233 INIT_LIST_HEAD(&table->objects);
3b49e2e9 1234 INIT_LIST_HEAD(&table->flowtables);
98319cb9 1235 table->family = family;
c5c1f975 1236 table->flags = flags;
ab482c6b 1237 table->handle = ++nft_net->table_handle;
6001a930
PNA		 1238 if (table->flags & NFT_TABLE_F_OWNER)
1239 table->nlpid = NETLINK_CB(skb).portid;
9ddf6323 1240
7dab8ee3 1241 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
55dd6f93 1242 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
ffdb210e 1243 if (err < 0)
98319cb9 1244 goto err_trans;
ffdb210e 1245
0854db2a 1246 list_add_tail_rcu(&table->list, &nft_net->tables);
96518518 1247 return 0;
98319cb9 1248err_trans:
1b2470e5
FW		 1249 rhltable_destroy(&table->chains_ht);
1250err_chain_ht:
7a81575b
JGG		 1251 kfree(table->udata);
1252err_table_udata:
e46abbcc 1253 kfree(table->name);
98319cb9 1254err_strdup:
ffdb210e 1255 kfree(table);
98319cb9 1256err_kzalloc:
ffdb210e 1257 return err;
96518518
PM		 1258}
1259
b9ac12ef
AB		 1260static int nft_flush_table(struct nft_ctx *ctx)
1261{
3b49e2e9 1262 struct nft_flowtable *flowtable, *nft;
b9ac12ef 1263 struct nft_chain *chain, *nc;
e5009240 1264 struct nft_object *obj, *ne;
b9ac12ef 1265 struct nft_set *set, *ns;
3b49e2e9 1266 int err;
b9ac12ef 1267
a2f18db0 1268 list_for_each_entry(chain, &ctx->table->chains, list) {
664b0f8c
PNA		 1269 if (!nft_is_active_next(ctx->net, chain))
1270 continue;
1271
d0e2c7de
PNA		 1272 if (nft_chain_is_bound(chain))
1273 continue;
1274
b9ac12ef
AB		 1275 ctx->chain = chain;
1276
1277 err = nft_delrule_by_chain(ctx);
1278 if (err < 0)
1279 goto out;
b9ac12ef
AB		 1280 }
1281
1282 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
37a9cc52
PNA		 1283 if (!nft_is_active_next(ctx->net, set))
1284 continue;
1285
408070d6 1286 if (nft_set_is_anonymous(set) &&
b9ac12ef
AB		 1287 !list_empty(&set->bindings))
1288 continue;
1289
1290 err = nft_delset(ctx, set);
1291 if (err < 0)
1292 goto out;
1293 }
1294
3b49e2e9 1295 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
335178d5
FW		 1296 if (!nft_is_active_next(ctx->net, flowtable))
1297 continue;
1298
3b49e2e9
PNA		 1299 err = nft_delflowtable(ctx, flowtable);
1300 if (err < 0)
1301 goto out;
1302 }
1303
e5009240 1304 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
335178d5
FW		 1305 if (!nft_is_active_next(ctx->net, obj))
1306 continue;
1307
e5009240
PNA		 1308 err = nft_delobj(ctx, obj);
1309 if (err < 0)
1310 goto out;
1311 }
1312
a2f18db0 1313 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
664b0f8c
PNA		 1314 if (!nft_is_active_next(ctx->net, chain))
1315 continue;
1316
d0e2c7de
PNA		 1317 if (nft_chain_is_bound(chain))
1318 continue;
1319
a2f18db0
PNA		 1320 ctx->chain = chain;
1321
1322 err = nft_delchain(ctx);
1323 if (err < 0)
1324 goto out;
1325 }
1326
b9ac12ef
AB		 1327 err = nft_deltable(ctx);
1328out:
1329 return err;
1330}
1331
1332static int nft_flush(struct nft_ctx *ctx, int family)
1333{
d59d2f82 1334 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
b9ac12ef 1335 const struct nlattr * const *nla = ctx->nla;
d59d2f82 1336 struct nft_table *table, *nt;
b9ac12ef
AB		 1337 int err = 0;
1338
0854db2a 1339 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
98319cb9 1340 if (family != AF_UNSPEC && table->family != family)
b9ac12ef
AB		 1341 continue;
1342
98319cb9 1343 ctx->family = table->family;
f2a6d766 1344
36596dad
PNA		 1345 if (!nft_is_active_next(ctx->net, table))
1346 continue;
b9ac12ef 1347
6001a930
PNA		 1348 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1349 continue;
1350
36596dad
PNA		 1351 if (nla[NFTA_TABLE_NAME] &&
1352 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1353 continue;
b9ac12ef 1354
36596dad
PNA		 1355 ctx->table = table;
1356
1357 err = nft_flush_table(ctx);
1358 if (err < 0)
1359 goto out;
b9ac12ef
AB		 1360 }
1361out:
1362 return err;
1363}
1364
7dab8ee3
PNA		 1365static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1366 const struct nlattr * const nla[])
96518518 1367{
7dab8ee3
PNA		 1368 struct netlink_ext_ack *extack = info->extack;
1369 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 1370 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 1371 struct net *net = info->net;
36dd1bcc
PNA		 1372 const struct nlattr *attr;
1373 struct nft_table *table;
55dd6f93 1374 struct nft_ctx ctx;
96518518 1375
7dab8ee3 1376 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
3ecbfd65
HS		 1377 if (family == AF_UNSPEC ||
1378 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
b9ac12ef
AB		 1379 return nft_flush(&ctx, family);
1380
36dd1bcc
PNA		 1381 if (nla[NFTA_TABLE_HANDLE]) {
1382 attr = nla[NFTA_TABLE_HANDLE];
e31f072f
PNA		 1383 table = nft_table_lookup_byhandle(net, attr, genmask,
1384 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 1385 } else {
1386 attr = nla[NFTA_TABLE_NAME];
6001a930
PNA		 1387 table = nft_table_lookup(net, attr, family, genmask,
1388 NETLINK_CB(skb).portid);
36dd1bcc 1389 }
3ecbfd65 1390
36dd1bcc
PNA		 1391 if (IS_ERR(table)) {
1392 NL_SET_BAD_ATTR(extack, attr);
96518518 1393 return PTR_ERR(table);
36dd1bcc 1394 }
96518518 1395
7dab8ee3 1396 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
a8278400
PNA		 1397 table->use > 0)
1398 return -EBUSY;
1399
98319cb9 1400 ctx.family = family;
b9ac12ef 1401 ctx.table = table;
55dd6f93 1402
b9ac12ef 1403 return nft_flush_table(&ctx);
96518518
PM		 1404}
1405
55dd6f93
PNA		 1406static void nf_tables_table_destroy(struct nft_ctx *ctx)
1407{
fa5950e4
FW		 1408 if (WARN_ON(ctx->table->use > 0))
1409 return;
4fefee57 1410
1b2470e5 1411 rhltable_destroy(&ctx->table->chains_ht);
e46abbcc 1412 kfree(ctx->table->name);
bc7a7082 1413 kfree(ctx->table->udata);
55dd6f93 1414 kfree(ctx->table);
55dd6f93
PNA		 1415}
1416
cc07eeb0 1417void nft_register_chain_type(const struct nft_chain_type *ctype)
96518518 1418{
96518518 1419 nfnl_lock(NFNL_SUBSYS_NFTABLES);
82603549 1420 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
cc07eeb0
PNA		 1421 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1422 return;
96518518 1423 }
9370761c 1424 chain_type[ctype->family][ctype->type] = ctype;
96518518 1425 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
96518518 1426}
9370761c 1427EXPORT_SYMBOL_GPL(nft_register_chain_type);
96518518 1428
32537e91 1429void nft_unregister_chain_type(const struct nft_chain_type *ctype)
96518518 1430{
96518518 1431 nfnl_lock(NFNL_SUBSYS_NFTABLES);
9370761c 1432 chain_type[ctype->family][ctype->type] = NULL;
96518518
PM		 1433 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1434}
9370761c 1435EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
96518518
PM		 1436
1437/*
1438 * Chains
1439 */
1440
1441static struct nft_chain *
cac20fcd 1442nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
96518518
PM		 1443{
1444 struct nft_chain *chain;
1445
1446 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 1447 if (chain->handle == handle &&
1448 nft_active_genmask(chain, genmask))
96518518
PM		 1449 return chain;
1450 }
1451
1452 return ERR_PTR(-ENOENT);
1453}
1454
4d44175a 1455static bool lockdep_commit_lock_is_held(const struct net *net)
f102d66b
FW		 1456{
1457#ifdef CONFIG_PROVE_LOCKING
d59d2f82 1458 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 1459
1460 return lockdep_is_held(&nft_net->commit_mutex);
f102d66b
FW		 1461#else
1462 return true;
1463#endif
1464}
1465
1466static struct nft_chain *nft_chain_lookup(struct net *net,
1467 struct nft_table *table,
cac20fcd 1468 const struct nlattr *nla, u8 genmask)
96518518 1469{
1b2470e5
FW		 1470 char search[NFT_CHAIN_MAXNAMELEN + 1];
1471 struct rhlist_head *tmp, *list;
96518518
PM		 1472 struct nft_chain *chain;
1473
1474 if (nla == NULL)
1475 return ERR_PTR(-EINVAL);
1476
872f6903 1477 nla_strscpy(search, nla, sizeof(search));
96518518 1478
1b2470e5 1479 WARN_ON(!rcu_read_lock_held() &&
f102d66b 1480 !lockdep_commit_lock_is_held(net));
1b2470e5
FW		 1481
1482 chain = ERR_PTR(-ENOENT);
1483 rcu_read_lock();
1484 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1485 if (!list)
1486 goto out_unlock;
1487
1488 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1489 if (nft_active_genmask(chain, genmask))
1490 goto out_unlock;
1491 }
1492 chain = ERR_PTR(-ENOENT);
1493out_unlock:
1494 rcu_read_unlock();
1495 return chain;
96518518
PM		 1496}
1497
1498static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
b2fbd044
LZ		 1499 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1500 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 1501 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1502 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1503 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1504 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
0ca743a5 1505 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
9332d27d
FW		 1506 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1507 .len = NFT_MODULE_AUTOLOAD_LIMIT },
0ca743a5 1508 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
c9626a2c 1509 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
74cccc3d 1510 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
002f2176
JGG		 1511 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1512 .len = NFT_USERDATA_MAXLEN },
96518518
PM		 1513};
1514
1515static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1516 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1517 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
2cbce139
PNA		 1518 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1519 .len = IFNAMSIZ - 1 },
96518518
PM		 1520};
1521
0ca743a5
PNA		 1522static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1523{
1524 struct nft_stats *cpu_stats, total;
1525 struct nlattr *nest;
ce355e20
ED		 1526 unsigned int seq;
1527 u64 pkts, bytes;
0ca743a5
PNA		 1528 int cpu;
1529
edbd82c5
FW		 1530 if (!stats)
1531 return 0;
1532
0ca743a5
PNA		 1533 memset(&total, 0, sizeof(total));
1534 for_each_possible_cpu(cpu) {
1535 cpu_stats = per_cpu_ptr(stats, cpu);
ce355e20 1536 do {
d120d1a6 1537 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
ce355e20
ED		 1538 pkts = cpu_stats->pkts;
1539 bytes = cpu_stats->bytes;
d120d1a6 1540 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
ce355e20
ED		 1541 total.pkts += pkts;
1542 total.bytes += bytes;
0ca743a5 1543 }
ae0be8de 1544 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
0ca743a5
PNA		 1545 if (nest == NULL)
1546 goto nla_put_failure;
1547
b46f6ded
ND		 1548 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1549 NFTA_COUNTER_PAD) ||
1550 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1551 NFTA_COUNTER_PAD))
0ca743a5
PNA		 1552 goto nla_put_failure;
1553
1554 nla_nest_end(skb, nest);
1555 return 0;
1556
1557nla_put_failure:
1558 return -ENOSPC;
1559}
1560
d54725cd
PNA		 1561static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
1562 const struct nft_base_chain *basechain)
1563{
1564 const struct nf_hook_ops *ops = &basechain->ops;
1565 struct nft_hook *hook, *first = NULL;
1566 struct nlattr *nest, *nest_devs;
1567 int n = 0;
1568
1569 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1570 if (nest == NULL)
1571 goto nla_put_failure;
1572 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1573 goto nla_put_failure;
1574 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1575 goto nla_put_failure;
1576
d3519cb8 1577 if (nft_base_chain_netdev(family, ops->hooknum)) {
d54725cd
PNA		 1578 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
1579 list_for_each_entry(hook, &basechain->hook_list, list) {
1580 if (!first)
1581 first = hook;
1582
1583 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1584 hook->ops.dev->name))
1585 goto nla_put_failure;
1586 n++;
1587 }
1588 nla_nest_end(skb, nest_devs);
1589
1590 if (n == 1 &&
1591 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1592 goto nla_put_failure;
1593 }
1594 nla_nest_end(skb, nest);
1595
1596 return 0;
1597nla_put_failure:
1598 return -1;
1599}
1600
84d7fce6
PNA		 1601static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1602 u32 portid, u32 seq, int event, u32 flags,
1603 int family, const struct nft_table *table,
96518518
PM		 1604 const struct nft_chain *chain)
1605{
1606 struct nlmsghdr *nlh;
96518518 1607
dedb67c4 1608 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 1609 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1610 NFNETLINK_V0, nft_base_seq(net));
1611 if (!nlh)
96518518
PM		 1612 goto nla_put_failure;
1613
96518518
PM		 1614 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name))
1615 goto nla_put_failure;
b46f6ded
ND		 1616 if (nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
1617 NFTA_CHAIN_PAD))
96518518
PM		 1618 goto nla_put_failure;
1619 if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name))
1620 goto nla_put_failure;
1621
f323d954 1622 if (nft_is_base_chain(chain)) {
0ca743a5 1623 const struct nft_base_chain *basechain = nft_base_chain(chain);
edbd82c5 1624 struct nft_stats __percpu *stats;
0ca743a5 1625
d54725cd 1626 if (nft_dump_basechain_hook(skb, family, basechain))
2cbce139 1627 goto nla_put_failure;
9370761c 1628
0ca743a5
PNA		 1629 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1630 htonl(basechain->policy)))
1631 goto nla_put_failure;
1632
baae3e62
PM		 1633 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1634 goto nla_put_failure;
0ca743a5 1635
edbd82c5
FW		 1636 stats = rcu_dereference_check(basechain->stats,
1637 lockdep_commit_lock_is_held(net));
1638 if (nft_dump_stats(skb, stats))
0ca743a5 1639 goto nla_put_failure;
96518518
PM		 1640 }
1641
d0e2c7de
PNA		 1642 if (chain->flags &&
1643 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1644 goto nla_put_failure;
1645
0ca743a5
PNA		 1646 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1647 goto nla_put_failure;
1648
002f2176
JGG		 1649 if (chain->udata &&
1650 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1651 goto nla_put_failure;
1652
053c095a
JB		 1653 nlmsg_end(skb, nlh);
1654 return 0;
96518518
PM		 1655
1656nla_put_failure:
1657 nlmsg_trim(skb, nlh);
1658 return -1;
1659}
1660
25e94a99 1661static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
96518518 1662{
0854db2a 1663 struct nftables_pernet *nft_net;
96518518 1664 struct sk_buff *skb;
6fb721cf 1665 u16 flags = 0;
96518518
PM		 1666 int err;
1667
128ad332
PNA		 1668 if (!ctx->report &&
1669 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 1670 return;
96518518 1671
96518518
PM		 1672 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1673 if (skb == NULL)
1674 goto err;
1675
6fb721cf
PNA		 1676 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1677 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1678
84d7fce6 1679 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
6fb721cf 1680 event, flags, ctx->family, ctx->table,
35151d84 1681 ctx->chain);
96518518
PM		 1682 if (err < 0) {
1683 kfree_skb(skb);
1684 goto err;
1685 }
1686
d59d2f82 1687 nft_net = nft_pernet(ctx->net);
0854db2a 1688 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 1689 return;
96518518 1690err:
25e94a99 1691 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 1692}
1693
1694static int nf_tables_dump_chains(struct sk_buff *skb,
1695 struct netlink_callback *cb)
1696{
1697 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
96518518 1698 unsigned int idx = 0, s_idx = cb->args[0];
99633ab2 1699 struct net *net = sock_net(skb->sk);
96518518 1700 int family = nfmsg->nfgen_family;
0854db2a 1701 struct nftables_pernet *nft_net;
d59d2f82
PNA		 1702 const struct nft_table *table;
1703 const struct nft_chain *chain;
96518518 1704
e688a7f8 1705 rcu_read_lock();
d59d2f82 1706 nft_net = nft_pernet(net);
34002783 1707 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 1708
0854db2a 1709 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 1710 if (family != NFPROTO_UNSPEC && family != table->family)
96518518
PM		 1711 continue;
1712
36596dad
PNA		 1713 list_for_each_entry_rcu(chain, &table->chains, list) {
1714 if (idx < s_idx)
1715 goto cont;
1716 if (idx > s_idx)
1717 memset(&cb->args[1], 0,
1718 sizeof(cb->args) - sizeof(cb->args[0]));
1719 if (!nft_is_active(net, chain))
1720 continue;
1721 if (nf_tables_fill_chain_info(skb, net,
1722 NETLINK_CB(cb->skb).portid,
1723 cb->nlh->nlmsg_seq,
1724 NFT_MSG_NEWCHAIN,
1725 NLM_F_MULTI,
98319cb9 1726 table->family, table,
36596dad
PNA		 1727 chain) < 0)
1728 goto done;
38e029f1 1729
36596dad 1730 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
96518518 1731cont:
36596dad 1732 idx++;
96518518
PM		 1733 }
1734 }
1735done:
e688a7f8 1736 rcu_read_unlock();
96518518
PM		 1737 cb->args[0] = idx;
1738 return skb->len;
1739}
1740
d9adf22a 1741/* called with rcu_read_lock held */
797d4980
PNA		 1742static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1743 const struct nlattr * const nla[])
96518518 1744{
797d4980
PNA		 1745 struct netlink_ext_ack *extack = info->extack;
1746 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 1747 u8 family = info->nfmsg->nfgen_family;
96518518 1748 const struct nft_chain *chain;
797d4980 1749 struct net *net = info->net;
1b2470e5 1750 struct nft_table *table;
96518518 1751 struct sk_buff *skb2;
96518518
PM		 1752 int err;
1753
797d4980 1754 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518
PM		 1755 struct netlink_dump_control c = {
1756 .dump = nf_tables_dump_chains,
d9adf22a 1757 .module = THIS_MODULE,
96518518 1758 };
d9adf22a 1759
797d4980 1760 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 1761 }
1762
6001a930 1763 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
36dd1bcc
PNA		 1764 if (IS_ERR(table)) {
1765 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 1766 return PTR_ERR(table);
36dd1bcc 1767 }
96518518 1768
f102d66b 1769 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
36dd1bcc
PNA		 1770 if (IS_ERR(chain)) {
1771 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
96518518 1772 return PTR_ERR(chain);
36dd1bcc 1773 }
96518518 1774
d9adf22a 1775 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 1776 if (!skb2)
1777 return -ENOMEM;
1778
84d7fce6 1779 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
797d4980
PNA		 1780 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
1781 0, family, table, chain);
96518518 1782 if (err < 0)
ee921183 1783 goto err_fill_chain_info;
96518518 1784
ee921183 1785 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 1786
ee921183 1787err_fill_chain_info:
96518518
PM		 1788 kfree_skb(skb2);
1789 return err;
1790}
1791
0ca743a5
PNA		 1792static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1793 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1794 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1795};
1796
ff3cd7b3 1797static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
0ca743a5
PNA		 1798{
1799 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1800 struct nft_stats __percpu *newstats;
1801 struct nft_stats *stats;
1802 int err;
1803
8cb08174
JB		 1804 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1805 nft_counter_policy, NULL);
0ca743a5 1806 if (err < 0)
ff3cd7b3 1807 return ERR_PTR(err);
0ca743a5
PNA		 1808
1809 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
ff3cd7b3 1810 return ERR_PTR(-EINVAL);
0ca743a5 1811
ce355e20 1812 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
0ca743a5 1813 if (newstats == NULL)
ff3cd7b3 1814 return ERR_PTR(-ENOMEM);
0ca743a5
PNA		 1815
1816 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1817 * are not exposed to userspace.
1818 */
e8781f70 1819 preempt_disable();
0ca743a5
PNA		 1820 stats = this_cpu_ptr(newstats);
1821 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
1822 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
e8781f70 1823 preempt_enable();
0ca743a5 1824
ff3cd7b3
PNA		 1825 return newstats;
1826}
1827
53315ac6 1828static void nft_chain_stats_replace(struct nft_trans *trans)
ff3cd7b3 1829{
53315ac6 1830 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
0befd061 1831
53315ac6 1832 if (!nft_trans_chain_stats(trans))
b88825de
PNA		 1833 return;
1834
b685b534
PM		 1835 nft_trans_chain_stats(trans) =
1836 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
1837 lockdep_commit_lock_is_held(trans->ctx.net));
53315ac6
FW		 1838
1839 if (!nft_trans_chain_stats(trans))
bbb8c61f 1840 static_branch_inc(&nft_counters_enabled);
0ca743a5
PNA		 1841}
1842
0cbc06b3
FW		 1843static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
1844{
2c865a8a
PNA		 1845 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
1846 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
0cbc06b3
FW		 1847
1848 if (g0 != g1)
1849 kvfree(g1);
1850 kvfree(g0);
1851
1852 /* should be NULL either via abort or via successful commit */
2c865a8a
PNA		 1853 WARN_ON_ONCE(chain->blob_next);
1854 kvfree(chain->blob_next);
0cbc06b3
FW		 1855}
1856
d0e2c7de 1857void nf_tables_chain_destroy(struct nft_ctx *ctx)
91c7b38d 1858{
43a605f2 1859 struct nft_chain *chain = ctx->chain;
d54725cd 1860 struct nft_hook *hook, *next;
43a605f2 1861
fa5950e4
FW		 1862 if (WARN_ON(chain->use > 0))
1863 return;
91c7b38d 1864
0cbc06b3
FW		 1865 /* no concurrent access possible anymore */
1866 nf_tables_chain_free_chain_rules(chain);
1867
f323d954 1868 if (nft_is_base_chain(chain)) {
2cbce139
PNA		 1869 struct nft_base_chain *basechain = nft_base_chain(chain);
1870
d3519cb8 1871 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
d54725cd
PNA		 1872 list_for_each_entry_safe(hook, next,
1873 &basechain->hook_list, list) {
1874 list_del_rcu(&hook->list);
1875 kfree_rcu(hook, rcu);
1876 }
1877 }
2cbce139 1878 module_put(basechain->type->owner);
4c05ec47 1879 if (rcu_access_pointer(basechain->stats)) {
9f08ea84 1880 static_branch_dec(&nft_counters_enabled);
4c05ec47
TY		 1881 free_percpu(rcu_dereference_raw(basechain->stats));
1882 }
b7263e07 1883 kfree(chain->name);
002f2176 1884 kfree(chain->udata);
2cbce139 1885 kfree(basechain);
91c7b38d 1886 } else {
b7263e07 1887 kfree(chain->name);
002f2176 1888 kfree(chain->udata);
91c7b38d
PNA		 1889 kfree(chain);
1890 }
1891}
1892
3f0465a9
PNA		 1893static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
1894 const struct nlattr *attr)
1895{
1896 struct net_device *dev;
1897 char ifname[IFNAMSIZ];
1898 struct nft_hook *hook;
1899 int err;
1900
33758c89 1901 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
3f0465a9
PNA		 1902 if (!hook) {
1903 err = -ENOMEM;
1904 goto err_hook_alloc;
1905 }
1906
872f6903 1907 nla_strscpy(ifname, attr, IFNAMSIZ);
42f1c271
PNA		 1908 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
1909 * indirectly serializing all the other holders of the commit_mutex with
1910 * the rtnl_mutex.
1911 */
3f0465a9
PNA		 1912 dev = __dev_get_by_name(net, ifname);
1913 if (!dev) {
1914 err = -ENOENT;
1915 goto err_hook_dev;
1916 }
1917 hook->ops.dev = dev;
1918
1919 return hook;
1920
1921err_hook_dev:
1922 kfree(hook);
1923err_hook_alloc:
1924 return ERR_PTR(err);
1925}
1926
abadb2f8
PNA		 1927static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
1928 const struct nft_hook *this)
b75a3e83
PNA		 1929{
1930 struct nft_hook *hook;
1931
1932 list_for_each_entry(hook, hook_list, list) {
1933 if (this->ops.dev == hook->ops.dev)
abadb2f8 1934 return hook;
b75a3e83
PNA		 1935 }
1936
abadb2f8 1937 return NULL;
b75a3e83
PNA		 1938}
1939
3f0465a9
PNA		 1940static int nf_tables_parse_netdev_hooks(struct net *net,
1941 const struct nlattr *attr,
1942 struct list_head *hook_list)
1943{
1944 struct nft_hook *hook, *next;
1945 const struct nlattr *tmp;
1946 int rem, n = 0, err;
1947
1948 nla_for_each_nested(tmp, attr, rem) {
1949 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
1950 err = -EINVAL;
1951 goto err_hook;
1952 }
1953
1954 hook = nft_netdev_hook_alloc(net, tmp);
1955 if (IS_ERR(hook)) {
1956 err = PTR_ERR(hook);
1957 goto err_hook;
1958 }
b75a3e83 1959 if (nft_hook_list_find(hook_list, hook)) {
cd77e75b 1960 kfree(hook);
b75a3e83
PNA		 1961 err = -EEXIST;
1962 goto err_hook;
1963 }
3f0465a9
PNA		 1964 list_add_tail(&hook->list, hook_list);
1965 n++;
1966
cb662ac6 1967 if (n == NFT_NETDEVICE_MAX) {
3f0465a9
PNA		 1968 err = -EFBIG;
1969 goto err_hook;
1970 }
1971 }
3f0465a9
PNA		 1972
1973 return 0;
1974
1975err_hook:
1976 list_for_each_entry_safe(hook, next, hook_list, list) {
1977 list_del(&hook->list);
1978 kfree(hook);
1979 }
1980 return err;
1981}
1982
508f8ccd
PNA		 1983struct nft_chain_hook {
1984 u32 num;
84ba7dd7 1985 s32 priority;
32537e91 1986 const struct nft_chain_type *type;
d54725cd 1987 struct list_head list;
508f8ccd
PNA		 1988};
1989
d54725cd
PNA		 1990static int nft_chain_parse_netdev(struct net *net,
1991 struct nlattr *tb[],
1992 struct list_head *hook_list)
1993{
1994 struct nft_hook *hook;
1995 int err;
1996
1997 if (tb[NFTA_HOOK_DEV]) {
1998 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
1999 if (IS_ERR(hook))
2000 return PTR_ERR(hook);
2001
2002 list_add_tail(&hook->list, hook_list);
2003 } else if (tb[NFTA_HOOK_DEVS]) {
2004 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
2005 hook_list);
2006 if (err < 0)
2007 return err;
05abe445
PNA		 2008
2009 if (list_empty(hook_list))
2010 return -EINVAL;
d54725cd
PNA		 2011 } else {
2012 return -EINVAL;
2013 }
2014
2015 return 0;
2016}
2017
508f8ccd
PNA		 2018static int nft_chain_parse_hook(struct net *net,
2019 const struct nlattr * const nla[],
36596dad 2020 struct nft_chain_hook *hook, u8 family,
983c4fcb 2021 struct netlink_ext_ack *extack, bool autoload)
508f8ccd 2022{
d59d2f82 2023 struct nftables_pernet *nft_net = nft_pernet(net);
508f8ccd 2024 struct nlattr *ha[NFTA_HOOK_MAX + 1];
32537e91 2025 const struct nft_chain_type *type;
508f8ccd
PNA		 2026 int err;
2027
0854db2a 2028 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b
FW		 2029 lockdep_nfnl_nft_mutex_not_held();
2030
8cb08174
JB		 2031 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2032 nla[NFTA_CHAIN_HOOK],
2033 nft_hook_policy, NULL);
508f8ccd
PNA		 2034 if (err < 0)
2035 return err;
2036
2037 if (ha[NFTA_HOOK_HOOKNUM] == NULL ||
2038 ha[NFTA_HOOK_PRIORITY] == NULL)
2039 return -EINVAL;
2040
2041 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
508f8ccd
PNA		 2042 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2043
82603549
PNA		 2044 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2045 if (!type)
2046 return -EOPNOTSUPP;
2047
508f8ccd 2048 if (nla[NFTA_CHAIN_TYPE]) {
452238e8 2049 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
445509eb 2050 family, autoload);
983c4fcb
PNA		 2051 if (IS_ERR(type)) {
2052 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
508f8ccd 2053 return PTR_ERR(type);
983c4fcb 2054 }
508f8ccd 2055 }
d25e2e93 2056 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
508f8ccd 2057 return -EOPNOTSUPP;
84ba7dd7
FW		 2058
2059 if (type->type == NFT_CHAIN_T_NAT &&
2060 hook->priority <= NF_IP_PRI_CONNTRACK)
2061 return -EOPNOTSUPP;
2062
983c4fcb
PNA		 2063 if (!try_module_get(type->owner)) {
2064 if (nla[NFTA_CHAIN_TYPE])
2065 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
508f8ccd 2066 return -ENOENT;
983c4fcb 2067 }
508f8ccd
PNA		 2068
2069 hook->type = type;
2070
d54725cd 2071 INIT_LIST_HEAD(&hook->list);
d3519cb8 2072 if (nft_base_chain_netdev(family, hook->num)) {
d54725cd
PNA		 2073 err = nft_chain_parse_netdev(net, ha, &hook->list);
2074 if (err < 0) {
508f8ccd 2075 module_put(type->owner);
d54725cd 2076 return err;
508f8ccd 2077 }
d54725cd 2078 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
508f8ccd
PNA		 2079 module_put(type->owner);
2080 return -EOPNOTSUPP;
2081 }
2082
2083 return 0;
2084}
2085
2086static void nft_chain_release_hook(struct nft_chain_hook *hook)
2087{
d54725cd
PNA		 2088 struct nft_hook *h, *next;
2089
2090 list_for_each_entry_safe(h, next, &hook->list, list) {
2091 list_del(&h->list);
2092 kfree(h);
2093 }
508f8ccd 2094 module_put(hook->type->owner);
508f8ccd
PNA		 2095}
2096
0cbc06b3
FW		 2097struct nft_rules_old {
2098 struct rcu_head h;
2c865a8a 2099 struct nft_rule_blob *blob;
0cbc06b3
FW		 2100};
2101
2c865a8a 2102static void nft_last_rule(struct nft_rule_blob *blob, const void *ptr)
0cbc06b3 2103{
2c865a8a
PNA		 2104 struct nft_rule_dp *prule;
2105
2106 prule = (struct nft_rule_dp *)ptr;
2107 prule->is_last = 1;
2c865a8a
PNA		 2108 /* blob size does not include the trailer rule */
2109}
2110
2111static struct nft_rule_blob *nf_tables_chain_alloc_rules(unsigned int size)
2112{
2113 struct nft_rule_blob *blob;
2114
2115 /* size must include room for the last rule */
2116 if (size < offsetof(struct nft_rule_dp, data))
2117 return NULL;
2118
2119 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rules_old);
2120 if (size > INT_MAX)
0cbc06b3
FW		 2121 return NULL;
2122
33758c89 2123 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2c865a8a 2124 if (!blob)
0cbc06b3
FW		 2125 return NULL;
2126
2c865a8a
PNA		 2127 blob->size = 0;
2128 nft_last_rule(blob, blob->data);
0cbc06b3 2129
2c865a8a 2130 return blob;
0cbc06b3
FW		 2131}
2132
d54725cd
PNA		 2133static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2134 const struct nft_chain_hook *hook,
2135 struct nft_chain *chain)
2136{
c5c6accd
FW		 2137 ops->pf = family;
2138 ops->hooknum = hook->num;
2139 ops->priority = hook->priority;
2140 ops->priv = chain;
2141 ops->hook = hook->type->hooks[ops->hooknum];
2142 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
d54725cd
PNA		 2143}
2144
2145static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2146 struct nft_chain_hook *hook, u32 flags)
2147{
2148 struct nft_chain *chain;
2149 struct nft_hook *h;
2150
2151 basechain->type = hook->type;
2152 INIT_LIST_HEAD(&basechain->hook_list);
2153 chain = &basechain->chain;
2154
d3519cb8 2155 if (nft_base_chain_netdev(family, hook->num)) {
d54725cd
PNA		 2156 list_splice_init(&hook->list, &basechain->hook_list);
2157 list_for_each_entry(h, &basechain->hook_list, list)
2158 nft_basechain_hook_init(&h->ops, family, hook, chain);
2159
2160 basechain->ops.hooknum = hook->num;
2161 basechain->ops.priority = hook->priority;
2162 } else {
2163 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
2164 }
2165
67c49de4 2166 chain->flags |= NFT_CHAIN_BASE | flags;
d54725cd
PNA		 2167 basechain->policy = NF_ACCEPT;
2168 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
77972a36
PNA		 2169 !nft_chain_offload_support(basechain)) {
2170 list_splice_init(&basechain->hook_list, &hook->list);
d54725cd 2171 return -EOPNOTSUPP;
77972a36 2172 }
d54725cd
PNA		 2173
2174 flow_block_init(&basechain->flow_block);
2175
2176 return 0;
2177}
2178
04b7db41
PNA		 2179static int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
2180{
2181 int err;
2182
2183 err = rhltable_insert_key(&table->chains_ht, chain->name,
2184 &chain->rhlhead, nft_chain_ht_params);
2185 if (err)
2186 return err;
2187
2188 list_add_tail_rcu(&chain->list, &table->chains);
2189
2190 return 0;
2191}
2192
d0e2c7de
PNA		 2193static u64 chain_id;
2194
4035285f 2195static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
983c4fcb
PNA		 2196 u8 policy, u32 flags,
2197 struct netlink_ext_ack *extack)
4035285f
PNA		 2198{
2199 const struct nlattr * const *nla = ctx->nla;
2200 struct nft_table *table = ctx->table;
4035285f 2201 struct nft_base_chain *basechain;
4035285f 2202 struct net *net = ctx->net;
d0e2c7de 2203 char name[NFT_NAME_MAXLEN];
2c865a8a 2204 struct nft_rule_blob *blob;
66293c46 2205 struct nft_trans *trans;
4035285f 2206 struct nft_chain *chain;
2c865a8a 2207 unsigned int data_size;
4035285f
PNA		 2208 int err;
2209
2210 if (table->use == UINT_MAX)
2211 return -EOVERFLOW;
2212
2213 if (nla[NFTA_CHAIN_HOOK]) {
921ebde3 2214 struct nft_stats __percpu *stats = NULL;
4035285f 2215 struct nft_chain_hook hook;
4035285f 2216
d0e2c7de
PNA		 2217 if (flags & NFT_CHAIN_BINDING)
2218 return -EOPNOTSUPP;
2219
983c4fcb
PNA		 2220 err = nft_chain_parse_hook(net, nla, &hook, family, extack,
2221 true);
4035285f
PNA		 2222 if (err < 0)
2223 return err;
2224
33758c89 2225 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2226 if (basechain == NULL) {
2227 nft_chain_release_hook(&hook);
2228 return -ENOMEM;
2229 }
d54725cd 2230 chain = &basechain->chain;
4035285f
PNA		 2231
2232 if (nla[NFTA_CHAIN_COUNTERS]) {
2233 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2234 if (IS_ERR(stats)) {
2235 nft_chain_release_hook(&hook);
2236 kfree(basechain);
2237 return PTR_ERR(stats);
2238 }
4c05ec47 2239 rcu_assign_pointer(basechain->stats, stats);
4035285f
PNA		 2240 }
2241
d54725cd
PNA		 2242 err = nft_basechain_init(basechain, family, &hook, flags);
2243 if (err < 0) {
2244 nft_chain_release_hook(&hook);
2245 kfree(basechain);
9a4d6dd5 2246 free_percpu(stats);
d54725cd
PNA		 2247 return err;
2248 }
921ebde3
TH		 2249 if (stats)
2250 static_branch_inc(&nft_counters_enabled);
4035285f 2251 } else {
d0e2c7de
PNA		 2252 if (flags & NFT_CHAIN_BASE)
2253 return -EINVAL;
2254 if (flags & NFT_CHAIN_HW_OFFLOAD)
2255 return -EOPNOTSUPP;
2256
33758c89 2257 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2258 if (chain == NULL)
2259 return -ENOMEM;
d0e2c7de
PNA		 2260
2261 chain->flags = flags;
4035285f 2262 }
43a605f2
PNA		 2263 ctx->chain = chain;
2264
4035285f
PNA		 2265 INIT_LIST_HEAD(&chain->rules);
2266 chain->handle = nf_tables_alloc_handle(table);
2267 chain->table = table;
d0e2c7de
PNA		 2268
2269 if (nla[NFTA_CHAIN_NAME]) {
33758c89 2270 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
d0e2c7de 2271 } else {
59136aa3
FW		 2272 if (!(flags & NFT_CHAIN_BINDING)) {
2273 err = -EINVAL;
002f2176 2274 goto err_destroy_chain;
59136aa3 2275 }
d0e2c7de
PNA		 2276
2277 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
33758c89 2278 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
d0e2c7de
PNA		 2279 }
2280
4035285f
PNA		 2281 if (!chain->name) {
2282 err = -ENOMEM;
002f2176
JGG		 2283 goto err_destroy_chain;
2284 }
2285
2286 if (nla[NFTA_CHAIN_USERDATA]) {
33758c89 2287 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
002f2176
JGG		 2288 if (chain->udata == NULL) {
2289 err = -ENOMEM;
2290 goto err_destroy_chain;
2291 }
2292 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
4035285f
PNA		 2293 }
2294
2c865a8a
PNA		 2295 data_size = offsetof(struct nft_rule_dp, data); /* last rule */
2296 blob = nf_tables_chain_alloc_rules(data_size);
2297 if (!blob) {
0cbc06b3 2298 err = -ENOMEM;
002f2176 2299 goto err_destroy_chain;
0cbc06b3
FW		 2300 }
2301
2c865a8a
PNA		 2302 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2303 RCU_INIT_POINTER(chain->blob_gen_1, blob);
0cbc06b3 2304
c974a3a3 2305 err = nf_tables_register_hook(net, table, chain);
4035285f 2306 if (err < 0)
002f2176 2307 goto err_destroy_chain;
4035285f 2308
66293c46
FW		 2309 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2310 if (IS_ERR(trans)) {
2311 err = PTR_ERR(trans);
002f2176 2312 goto err_unregister_hook;
1b2470e5 2313 }
4035285f 2314
ad652f38 2315 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
66293c46
FW		 2316 if (nft_is_base_chain(chain))
2317 nft_trans_chain_policy(trans) = policy;
2318
04b7db41
PNA		 2319 err = nft_chain_add(table, chain);
2320 if (err < 0) {
2321 nft_trans_destroy(trans);
002f2176 2322 goto err_unregister_hook;
04b7db41
PNA		 2323 }
2324
4035285f 2325 table->use++;
4035285f
PNA		 2326
2327 return 0;
002f2176 2328err_unregister_hook:
c974a3a3 2329 nf_tables_unregister_hook(net, table, chain);
002f2176 2330err_destroy_chain:
43a605f2 2331 nf_tables_chain_destroy(ctx);
4035285f
PNA		 2332
2333 return err;
2334}
2335
d54725cd
PNA		 2336static bool nft_hook_list_equal(struct list_head *hook_list1,
2337 struct list_head *hook_list2)
2338{
2339 struct nft_hook *hook;
2340 int n = 0, m = 0;
2341
2342 n = 0;
2343 list_for_each_entry(hook, hook_list2, list) {
2344 if (!nft_hook_list_find(hook_list1, hook))
2345 return false;
2346
2347 n++;
2348 }
2349 list_for_each_entry(hook, hook_list1, list)
2350 m++;
2351
2352 return n == m;
2353}
2354
c9626a2c 2355static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
98a381a7
PNA		 2356 u32 flags, const struct nlattr *attr,
2357 struct netlink_ext_ack *extack)
2c4a488a
PNA		 2358{
2359 const struct nlattr * const *nla = ctx->nla;
2360 struct nft_table *table = ctx->table;
2361 struct nft_chain *chain = ctx->chain;
2c4a488a
PNA		 2362 struct nft_base_chain *basechain;
2363 struct nft_stats *stats = NULL;
2364 struct nft_chain_hook hook;
2c4a488a
PNA		 2365 struct nf_hook_ops *ops;
2366 struct nft_trans *trans;
c974a3a3 2367 int err;
2c4a488a 2368
c9626a2c
PNA		 2369 if (chain->flags ^ flags)
2370 return -EOPNOTSUPP;
2371
2c4a488a 2372 if (nla[NFTA_CHAIN_HOOK]) {
98a381a7
PNA		 2373 if (!nft_is_base_chain(chain)) {
2374 NL_SET_BAD_ATTR(extack, attr);
77a92189 2375 return -EEXIST;
98a381a7 2376 }
36596dad 2377 err = nft_chain_parse_hook(ctx->net, nla, &hook, ctx->family,
983c4fcb 2378 extack, false);
2c4a488a
PNA		 2379 if (err < 0)
2380 return err;
2381
2382 basechain = nft_base_chain(chain);
2383 if (basechain->type != hook.type) {
2384 nft_chain_release_hook(&hook);
98a381a7 2385 NL_SET_BAD_ATTR(extack, attr);
77a92189 2386 return -EEXIST;
2c4a488a
PNA		 2387 }
2388
d3519cb8 2389 if (nft_base_chain_netdev(ctx->family, hook.num)) {
d54725cd
PNA		 2390 if (!nft_hook_list_equal(&basechain->hook_list,
2391 &hook.list)) {
2392 nft_chain_release_hook(&hook);
98a381a7 2393 NL_SET_BAD_ATTR(extack, attr);
77a92189 2394 return -EEXIST;
d54725cd
PNA		 2395 }
2396 } else {
2397 ops = &basechain->ops;
2398 if (ops->hooknum != hook.num ||
2399 ops->priority != hook.priority) {
2400 nft_chain_release_hook(&hook);
98a381a7 2401 NL_SET_BAD_ATTR(extack, attr);
77a92189 2402 return -EEXIST;
d54725cd 2403 }
2c4a488a
PNA		 2404 }
2405 nft_chain_release_hook(&hook);
2406 }
2407
2408 if (nla[NFTA_CHAIN_HANDLE] &&
2409 nla[NFTA_CHAIN_NAME]) {
2410 struct nft_chain *chain2;
2411
f102d66b
FW		 2412 chain2 = nft_chain_lookup(ctx->net, table,
2413 nla[NFTA_CHAIN_NAME], genmask);
98a381a7
PNA		 2414 if (!IS_ERR(chain2)) {
2415 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
0d18779b 2416 return -EEXIST;
98a381a7 2417 }
2c4a488a
PNA		 2418 }
2419
2420 if (nla[NFTA_CHAIN_COUNTERS]) {
2421 if (!nft_is_base_chain(chain))
2422 return -EOPNOTSUPP;
2423
2424 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2425 if (IS_ERR(stats))
2426 return PTR_ERR(stats);
2427 }
2428
c6cc94df 2429 err = -ENOMEM;
2c4a488a
PNA		 2430 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2431 sizeof(struct nft_trans_chain));
c6cc94df
FW		 2432 if (trans == NULL)
2433 goto err;
2c4a488a
PNA		 2434
2435 nft_trans_chain_stats(trans) = stats;
2436 nft_trans_chain_update(trans) = true;
2437
2438 if (nla[NFTA_CHAIN_POLICY])
2439 nft_trans_chain_policy(trans) = policy;
2440 else
2441 nft_trans_chain_policy(trans) = -1;
2442
c6cc94df
FW		 2443 if (nla[NFTA_CHAIN_HANDLE] &&
2444 nla[NFTA_CHAIN_NAME]) {
d59d2f82 2445 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c6cc94df
FW		 2446 struct nft_trans *tmp;
2447 char *name;
2448
2449 err = -ENOMEM;
33758c89 2450 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
c6cc94df
FW		 2451 if (!name)
2452 goto err;
2453
2454 err = -EEXIST;
0854db2a 2455 list_for_each_entry(tmp, &nft_net->commit_list, list) {
c6cc94df
FW		 2456 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2457 tmp->ctx.table == table &&
2458 nft_trans_chain_update(tmp) &&
2459 nft_trans_chain_name(tmp) &&
2460 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
98a381a7 2461 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
c6cc94df
FW		 2462 kfree(name);
2463 goto err;
2464 }
2c4a488a 2465 }
c6cc94df
FW		 2466
2467 nft_trans_chain_name(trans) = name;
2c4a488a 2468 }
0854db2a 2469 nft_trans_commit_list_add_tail(ctx->net, trans);
2c4a488a
PNA		 2470
2471 return 0;
c6cc94df
FW		 2472err:
2473 free_percpu(stats);
2474 kfree(trans);
2475 return err;
2c4a488a
PNA		 2476}
2477
837830a4 2478static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
95f466d2 2479 const struct nft_table *table,
837830a4
PNA		 2480 const struct nlattr *nla)
2481{
d59d2f82 2482 struct nftables_pernet *nft_net = nft_pernet(net);
837830a4
PNA		 2483 u32 id = ntohl(nla_get_be32(nla));
2484 struct nft_trans *trans;
2485
0854db2a 2486 list_for_each_entry(trans, &nft_net->commit_list, list) {
837830a4
PNA		 2487 struct nft_chain *chain = trans->ctx.chain;
2488
2489 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
95f466d2 2490 chain->table == table &&
837830a4
PNA		 2491 id == nft_trans_chain_id(trans))
2492 return chain;
2493 }
2494 return ERR_PTR(-ENOENT);
2495}
2496
7dab8ee3
PNA		 2497static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2498 const struct nlattr * const nla[])
96518518 2499{
7dab8ee3 2500 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 2501 struct netlink_ext_ack *extack = info->extack;
2502 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2503 u8 family = info->nfmsg->nfgen_family;
74cccc3d 2504 struct nft_chain *chain = NULL;
7dab8ee3 2505 struct net *net = info->net;
36dd1bcc 2506 const struct nlattr *attr;
96518518 2507 struct nft_table *table;
57de2a0c 2508 u8 policy = NF_ACCEPT;
4035285f 2509 struct nft_ctx ctx;
96518518 2510 u64 handle = 0;
c9626a2c 2511 u32 flags = 0;
96518518 2512
0854db2a 2513 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 2514
6001a930
PNA		 2515 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2516 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2517 if (IS_ERR(table)) {
2518 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2519 return PTR_ERR(table);
36dd1bcc 2520 }
96518518 2521
96518518 2522 chain = NULL;
36dd1bcc 2523 attr = nla[NFTA_CHAIN_NAME];
96518518
PM		 2524
2525 if (nla[NFTA_CHAIN_HANDLE]) {
2526 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
cac20fcd 2527 chain = nft_chain_lookup_byhandle(table, handle, genmask);
36dd1bcc
PNA		 2528 if (IS_ERR(chain)) {
2529 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
96518518 2530 return PTR_ERR(chain);
36dd1bcc
PNA		 2531 }
2532 attr = nla[NFTA_CHAIN_HANDLE];
74cccc3d 2533 } else if (nla[NFTA_CHAIN_NAME]) {
f102d66b 2534 chain = nft_chain_lookup(net, table, attr, genmask);
96518518 2535 if (IS_ERR(chain)) {
36dd1bcc
PNA		 2536 if (PTR_ERR(chain) != -ENOENT) {
2537 NL_SET_BAD_ATTR(extack, attr);
96518518 2538 return PTR_ERR(chain);
36dd1bcc 2539 }
96518518
PM		 2540 chain = NULL;
2541 }
74cccc3d
PNA		 2542 } else if (!nla[NFTA_CHAIN_ID]) {
2543 return -EINVAL;
96518518
PM		 2544 }
2545
57de2a0c 2546 if (nla[NFTA_CHAIN_POLICY]) {
f323d954 2547 if (chain != NULL &&
36dd1bcc
PNA		 2548 !nft_is_base_chain(chain)) {
2549 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
d6b6cb1d 2550 return -EOPNOTSUPP;
36dd1bcc 2551 }
d6b6cb1d
PNA		 2552
2553 if (chain == NULL &&
36dd1bcc
PNA		 2554 nla[NFTA_CHAIN_HOOK] == NULL) {
2555 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
57de2a0c 2556 return -EOPNOTSUPP;
36dd1bcc 2557 }
57de2a0c 2558
8f46df18 2559 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
57de2a0c
PM		 2560 switch (policy) {
2561 case NF_DROP:
2562 case NF_ACCEPT:
2563 break;
2564 default:
2565 return -EINVAL;
2566 }
2567 }
2568
c9626a2c
PNA		 2569 if (nla[NFTA_CHAIN_FLAGS])
2570 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
b717273d
FW		 2571 else if (chain)
2572 flags = chain->flags;
c9626a2c 2573
c1f79a2e
PNA		 2574 if (flags & ~NFT_CHAIN_FLAGS)
2575 return -EOPNOTSUPP;
2576
7dab8ee3 2577 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4035285f 2578
96518518 2579 if (chain != NULL) {
5dc52d83
PNA		 2580 if (chain->flags & NFT_CHAIN_BINDING)
2581 return -EINVAL;
2582
7dab8ee3 2583 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 2584 NL_SET_BAD_ATTR(extack, attr);
96518518 2585 return -EEXIST;
36dd1bcc 2586 }
7dab8ee3 2587 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 2588 return -EOPNOTSUPP;
2589
67c49de4 2590 flags |= chain->flags & NFT_CHAIN_BASE;
98a381a7
PNA		 2591 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2592 extack);
96518518
PM		 2593 }
2594
983c4fcb 2595 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
96518518
PM		 2596}
2597
7dab8ee3
PNA		 2598static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2599 const struct nlattr * const nla[])
96518518 2600{
7dab8ee3
PNA		 2601 struct netlink_ext_ack *extack = info->extack;
2602 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2603 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 2604 struct net *net = info->net;
36dd1bcc 2605 const struct nlattr *attr;
96518518
PM		 2606 struct nft_table *table;
2607 struct nft_chain *chain;
9dee1474 2608 struct nft_rule *rule;
91c7b38d 2609 struct nft_ctx ctx;
3ecbfd65 2610 u64 handle;
9dee1474
PNA		 2611 u32 use;
2612 int err;
96518518 2613
6001a930
PNA		 2614 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2615 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2616 if (IS_ERR(table)) {
2617 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2618 return PTR_ERR(table);
36dd1bcc 2619 }
96518518 2620
3ecbfd65 2621 if (nla[NFTA_CHAIN_HANDLE]) {
36dd1bcc
PNA		 2622 attr = nla[NFTA_CHAIN_HANDLE];
2623 handle = be64_to_cpu(nla_get_be64(attr));
cac20fcd 2624 chain = nft_chain_lookup_byhandle(table, handle, genmask);
3ecbfd65 2625 } else {
36dd1bcc 2626 attr = nla[NFTA_CHAIN_NAME];
f102d66b 2627 chain = nft_chain_lookup(net, table, attr, genmask);
3ecbfd65 2628 }
36dd1bcc
PNA		 2629 if (IS_ERR(chain)) {
2630 NL_SET_BAD_ATTR(extack, attr);
96518518 2631 return PTR_ERR(chain);
36dd1bcc 2632 }
9dee1474 2633
7dab8ee3 2634 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
9dee1474 2635 chain->use > 0)
96518518
PM		 2636 return -EBUSY;
2637
7dab8ee3 2638 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0165d932 2639
9dee1474
PNA		 2640 use = chain->use;
2641 list_for_each_entry(rule, &chain->rules, list) {
2642 if (!nft_is_active_next(net, rule))
2643 continue;
2644 use--;
2645
2646 err = nft_delrule(&ctx, rule);
2647 if (err < 0)
2648 return err;
2649 }
2650
2651 /* There are rules and elements that are still holding references to us,
2652 * we cannot do a recursive removal in this case.
2653 */
36dd1bcc
PNA		 2654 if (use > 0) {
2655 NL_SET_BAD_ATTR(extack, attr);
9dee1474 2656 return -EBUSY;
36dd1bcc 2657 }
9dee1474 2658
ee01d542 2659 return nft_delchain(&ctx);
96518518
PM		 2660}
2661
96518518
PM		 2662/*
2663 * Expressions
2664 */
2665
2666/**
ef1f7df9 2667 * nft_register_expr - register nf_tables expr type
3db86c39 2668 * @type: expr type
96518518 2669 *
ef1f7df9 2670 * Registers the expr type for use with nf_tables. Returns zero on
96518518
PM		 2671 * success or a negative errno code otherwise.
2672 */
ef1f7df9 2673int nft_register_expr(struct nft_expr_type *type)
96518518
PM		 2674{
2675 nfnl_lock(NFNL_SUBSYS_NFTABLES);
758dbcec 2676 if (type->family == NFPROTO_UNSPEC)
e688a7f8 2677 list_add_tail_rcu(&type->list, &nf_tables_expressions);
758dbcec 2678 else
e688a7f8 2679 list_add_rcu(&type->list, &nf_tables_expressions);
96518518
PM		 2680 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2681 return 0;
2682}
2683EXPORT_SYMBOL_GPL(nft_register_expr);
2684
2685/**
ef1f7df9 2686 * nft_unregister_expr - unregister nf_tables expr type
3db86c39 2687 * @type: expr type
96518518 2688 *
ef1f7df9 2689 * Unregisters the expr typefor use with nf_tables.
96518518 2690 */
ef1f7df9 2691void nft_unregister_expr(struct nft_expr_type *type)
96518518
PM		 2692{
2693 nfnl_lock(NFNL_SUBSYS_NFTABLES);
e688a7f8 2694 list_del_rcu(&type->list);
96518518
PM		 2695 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2696}
2697EXPORT_SYMBOL_GPL(nft_unregister_expr);
2698
64d46806
PM		 2699static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2700 struct nlattr *nla)
96518518 2701{
9cff126f 2702 const struct nft_expr_type *type, *candidate = NULL;
96518518 2703
ef1f7df9 2704 list_for_each_entry(type, &nf_tables_expressions, list) {
9cff126f
PNA		 2705 if (!nla_strcmp(nla, type->name)) {
2706 if (!type->family && !candidate)
2707 candidate = type;
2708 else if (type->family == family)
2709 candidate = type;
2710 }
96518518 2711 }
9cff126f 2712 return candidate;
96518518
PM		 2713}
2714
b9c04ae7
PNA		 2715#ifdef CONFIG_MODULES
2716static int nft_expr_type_request_module(struct net *net, u8 family,
2717 struct nlattr *nla)
2718{
eb014de4
PNA		 2719 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
2720 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
b9c04ae7
PNA		 2721 return -EAGAIN;
2722
2723 return 0;
2724}
2725#endif
2726
452238e8
FW		 2727static const struct nft_expr_type *nft_expr_type_get(struct net *net,
2728 u8 family,
64d46806 2729 struct nlattr *nla)
96518518 2730{
ef1f7df9 2731 const struct nft_expr_type *type;
96518518
PM		 2732
2733 if (nla == NULL)
2734 return ERR_PTR(-EINVAL);
2735
64d46806 2736 type = __nft_expr_type_get(family, nla);
ef1f7df9
PM		 2737 if (type != NULL && try_module_get(type->owner))
2738 return type;
96518518 2739
f102d66b 2740 lockdep_nfnl_nft_mutex_not_held();
96518518 2741#ifdef CONFIG_MODULES
ef1f7df9 2742 if (type == NULL) {
b9c04ae7 2743 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
64d46806
PM		 2744 return ERR_PTR(-EAGAIN);
2745
eb014de4
PNA		 2746 if (nft_request_module(net, "nft-expr-%.*s",
2747 nla_len(nla),
2748 (char *)nla_data(nla)) == -EAGAIN)
96518518
PM		 2749 return ERR_PTR(-EAGAIN);
2750 }
2751#endif
2752 return ERR_PTR(-ENOENT);
2753}
2754
2755static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
9332d27d
FW		 2756 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
2757 .len = NFT_MODULE_AUTOLOAD_LIMIT },
96518518
PM		 2758 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
2759};
2760
2761static int nf_tables_fill_expr_info(struct sk_buff *skb,
8daa8fde 2762 const struct nft_expr *expr, bool reset)
96518518 2763{
ef1f7df9 2764 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
96518518
PM		 2765 goto nla_put_failure;
2766
2767 if (expr->ops->dump) {
ae0be8de
MK		 2768 struct nlattr *data = nla_nest_start_noflag(skb,
2769 NFTA_EXPR_DATA);
96518518
PM		 2770 if (data == NULL)
2771 goto nla_put_failure;
8daa8fde 2772 if (expr->ops->dump(skb, expr, reset) < 0)
96518518
PM		 2773 goto nla_put_failure;
2774 nla_nest_end(skb, data);
2775 }
2776
2777 return skb->len;
2778
2779nla_put_failure:
2780 return -1;
2781};
2782
0b2d8a7b 2783int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
8daa8fde 2784 const struct nft_expr *expr, bool reset)
0b2d8a7b
PM		 2785{
2786 struct nlattr *nest;
2787
ae0be8de 2788 nest = nla_nest_start_noflag(skb, attr);
0b2d8a7b
PM		 2789 if (!nest)
2790 goto nla_put_failure;
8daa8fde 2791 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
0b2d8a7b
PM		 2792 goto nla_put_failure;
2793 nla_nest_end(skb, nest);
2794 return 0;
2795
2796nla_put_failure:
2797 return -1;
2798}
2799
96518518
PM		 2800struct nft_expr_info {
2801 const struct nft_expr_ops *ops;
83d9dcba 2802 const struct nlattr *attr;
ef1f7df9 2803 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
96518518
PM		 2804};
2805
0ca743a5
PNA		 2806static int nf_tables_expr_parse(const struct nft_ctx *ctx,
2807 const struct nlattr *nla,
96518518
PM		 2808 struct nft_expr_info *info)
2809{
ef1f7df9 2810 const struct nft_expr_type *type;
96518518 2811 const struct nft_expr_ops *ops;
ef1f7df9 2812 struct nlattr *tb[NFTA_EXPR_MAX + 1];
96518518
PM		 2813 int err;
2814
8cb08174
JB		 2815 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
2816 nft_expr_policy, NULL);
96518518
PM		 2817 if (err < 0)
2818 return err;
2819
452238e8 2820 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
ef1f7df9
PM		 2821 if (IS_ERR(type))
2822 return PTR_ERR(type);
2823
2824 if (tb[NFTA_EXPR_DATA]) {
8cb08174
JB		 2825 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
2826 tb[NFTA_EXPR_DATA],
2827 type->policy, NULL);
ef1f7df9
PM		 2828 if (err < 0)
2829 goto err1;
2830 } else
2831 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
2832
2833 if (type->select_ops != NULL) {
0ca743a5
PNA		 2834 ops = type->select_ops(ctx,
2835 (const struct nlattr * const *)info->tb);
ef1f7df9
PM		 2836 if (IS_ERR(ops)) {
2837 err = PTR_ERR(ops);
0ef1efd1
PNA		 2838#ifdef CONFIG_MODULES
2839 if (err == -EAGAIN)
eb014de4
PNA		 2840 if (nft_expr_type_request_module(ctx->net,
2841 ctx->family,
2842 tb[NFTA_EXPR_NAME]) != -EAGAIN)
2843 err = -ENOENT;
0ef1efd1 2844#endif
ef1f7df9
PM		 2845 goto err1;
2846 }
2847 } else
2848 ops = type->ops;
2849
83d9dcba 2850 info->attr = nla;
96518518 2851 info->ops = ops;
83d9dcba 2852
96518518 2853 return 0;
ef1f7df9
PM		 2854
2855err1:
2856 module_put(type->owner);
2857 return err;
96518518
PM		 2858}
2859
3a07327d
PNA		 2860int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
2861 struct nft_expr_info *info)
2862{
2863 struct nlattr *tb[NFTA_EXPR_MAX + 1];
2864 const struct nft_expr_type *type;
2865 int err;
2866
2867 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
2868 nft_expr_policy, NULL);
2869 if (err < 0)
2870 return err;
2871
2872 if (!tb[NFTA_EXPR_DATA])
2873 return -EINVAL;
2874
2875 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
98cbc40e
DC		 2876 if (!type)
2877 return -ENOENT;
3a07327d
PNA		 2878
2879 if (!type->inner_ops)
2880 return -EOPNOTSUPP;
2881
2882 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
2883 tb[NFTA_EXPR_DATA],
2884 type->policy, NULL);
2885 if (err < 0)
2886 goto err_nla_parse;
2887
2888 info->attr = nla;
2889 info->ops = type->inner_ops;
2890
2891 return 0;
2892
2893err_nla_parse:
2894 return err;
2895}
2896
96518518 2897static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 2898 const struct nft_expr_info *expr_info,
96518518
PM		 2899 struct nft_expr *expr)
2900{
7dab8ee3 2901 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 2902 int err;
2903
2904 expr->ops = ops;
2905 if (ops->init) {
7dab8ee3 2906 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 2907 if (err < 0)
2908 goto err1;
2909 }
2910
96518518 2911 return 0;
96518518
PM		 2912err1:
2913 expr->ops = NULL;
2914 return err;
2915}
2916
62472bce
PM		 2917static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
2918 struct nft_expr *expr)
96518518 2919{
3f3a390d
PNA		 2920 const struct nft_expr_type *type = expr->ops->type;
2921
96518518 2922 if (expr->ops->destroy)
62472bce 2923 expr->ops->destroy(ctx, expr);
3f3a390d 2924 module_put(type->owner);
96518518
PM		 2925}
2926
795a6d6b
PNA		 2927static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
2928 const struct nlattr *nla)
0b2d8a7b 2929{
7dab8ee3 2930 struct nft_expr_info expr_info;
0b2d8a7b 2931 struct nft_expr *expr;
b8e20400 2932 struct module *owner;
0b2d8a7b
PM		 2933 int err;
2934
7dab8ee3 2935 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 2936 if (err < 0)
52077804
PNA		 2937 goto err_expr_parse;
2938
2939 err = -EOPNOTSUPP;
2940 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
2941 goto err_expr_stateful;
0b2d8a7b
PM		 2942
2943 err = -ENOMEM;
33758c89 2944 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 2945 if (expr == NULL)
52077804 2946 goto err_expr_stateful;
0b2d8a7b 2947
7dab8ee3 2948 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 2949 if (err < 0)
52077804 2950 goto err_expr_new;
0b2d8a7b
PM		 2951
2952 return expr;
52077804 2953err_expr_new:
6cafaf47 2954 kfree(expr);
52077804 2955err_expr_stateful:
7dab8ee3
PNA		 2956 owner = expr_info.ops->type->owner;
2957 if (expr_info.ops->type->release_ops)
2958 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 2959
2960 module_put(owner);
52077804 2961err_expr_parse:
0b2d8a7b
PM		 2962 return ERR_PTR(err);
2963}
2964
c604cc69
PNA		 2965int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
2966{
2967 int err;
2968
2969 if (src->ops->clone) {
2970 dst->ops = src->ops;
2971 err = src->ops->clone(dst, src);
2972 if (err < 0)
2973 return err;
2974 } else {
2975 memcpy(dst, src, src->ops->size);
2976 }
2977
2978 __module_get(src->ops->type->owner);
2979
2980 return 0;
2981}
2982
0b2d8a7b
PM		 2983void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
2984{
2985 nf_tables_expr_destroy(ctx, expr);
2986 kfree(expr);
2987}
2988
96518518
PM		 2989/*
2990 * Rules
2991 */
2992
cac20fcd
PNA		 2993static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
2994 u64 handle)
96518518
PM		 2995{
2996 struct nft_rule *rule;
2997
2998 // FIXME: this sucks
d9adf22a 2999 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 3000 if (handle == rule->handle)
3001 return rule;
3002 }
3003
3004 return ERR_PTR(-ENOENT);
3005}
3006
cac20fcd
PNA		 3007static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3008 const struct nlattr *nla)
96518518
PM		 3009{
3010 if (nla == NULL)
3011 return ERR_PTR(-EINVAL);
3012
cac20fcd 3013 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 3014}
3015
3016static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 3017 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3018 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 3019 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3020 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3021 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
3022 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
0ca743a5 3023 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 3024 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 3025 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3026 .len = NFT_USERDATA_MAXLEN },
467697d2 3027 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 3028 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 3029 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 3030};
3031
84d7fce6
PNA		 3032static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3033 u32 portid, u32 seq, int event,
3034 u32 flags, int family,
96518518
PM		 3035 const struct nft_table *table,
3036 const struct nft_chain *chain,
8daa8fde
PS		 3037 const struct nft_rule *rule, u64 handle,
3038 bool reset)
96518518
PM		 3039{
3040 struct nlmsghdr *nlh;
96518518
PM		 3041 const struct nft_expr *expr, *next;
3042 struct nlattr *list;
dedb67c4 3043 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3044
19c28b13
PNA		 3045 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3046 nft_base_seq(net));
3047 if (!nlh)
96518518
PM		 3048 goto nla_put_failure;
3049
96518518
PM		 3050 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3051 goto nla_put_failure;
3052 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3053 goto nla_put_failure;
b46f6ded
ND		 3054 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3055 NFTA_RULE_PAD))
96518518
PM		 3056 goto nla_put_failure;
3057
e189ae16
PNA		 3058 if (event != NFT_MSG_DELRULE && handle) {
3059 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3060 NFTA_RULE_PAD))
5e948466
EL		 3061 goto nla_put_failure;
3062 }
3063
b72920f6
PNA		 3064 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3065 nft_flow_rule_stats(chain, rule);
3066
ae0be8de 3067 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3068 if (list == NULL)
3069 goto nla_put_failure;
3070 nft_rule_for_each_expr(expr, next, rule) {
8daa8fde 3071 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
96518518 3072 goto nla_put_failure;
96518518
PM		 3073 }
3074 nla_nest_end(skb, list);
3075
86f1ec32
PM		 3076 if (rule->udata) {
3077 struct nft_userdata *udata = nft_userdata(rule);
3078 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3079 udata->data) < 0)
3080 goto nla_put_failure;
3081 }
0768b3b3 3082
053c095a
JB		 3083 nlmsg_end(skb, nlh);
3084 return 0;
96518518
PM		 3085
3086nla_put_failure:
3087 nlmsg_trim(skb, nlh);
3088 return -1;
3089}
3090
25e94a99
PNA		 3091static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3092 const struct nft_rule *rule, int event)
96518518 3093{
d59d2f82 3094 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3095 const struct nft_rule *prule;
96518518 3096 struct sk_buff *skb;
e189ae16
PNA		 3097 u64 handle = 0;
3098 u16 flags = 0;
96518518
PM		 3099 int err;
3100
128ad332
PNA		 3101 if (!ctx->report &&
3102 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3103 return;
96518518 3104
96518518
PM		 3105 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3106 if (skb == NULL)
3107 goto err;
3108
e189ae16
PNA		 3109 if (event == NFT_MSG_NEWRULE &&
3110 !list_is_first(&rule->list, &ctx->chain->rules) &&
3111 !list_is_last(&rule->list, &ctx->chain->rules)) {
3112 prule = list_prev_entry(rule, list);
3113 handle = prule->handle;
3114 }
3115 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3116 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3117 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3118 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3119
84d7fce6 3120 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16 3121 event, flags, ctx->family, ctx->table,
8daa8fde 3122 ctx->chain, rule, handle, false);
96518518
PM		 3123 if (err < 0) {
3124 kfree_skb(skb);
3125 goto err;
3126 }
3127
0854db2a 3128 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3129 return;
96518518 3130err:
25e94a99 3131 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3132}
3133
6e1f760e 3134struct nft_rule_dump_ctx {
e46abbcc 3135 char *table;
b7263e07 3136 char *chain;
6e1f760e
PNA		 3137};
3138
241faece
PS		 3139static int __nf_tables_dump_rules(struct sk_buff *skb,
3140 unsigned int *idx,
3141 struct netlink_callback *cb,
3142 const struct nft_table *table,
8daa8fde
PS		 3143 const struct nft_chain *chain,
3144 bool reset)
241faece
PS		 3145{
3146 struct net *net = sock_net(skb->sk);
2c82c7e7 3147 const struct nft_rule *rule, *prule;
241faece 3148 unsigned int s_idx = cb->args[0];
e189ae16 3149 u64 handle;
241faece 3150
2c82c7e7 3151 prule = NULL;
241faece
PS		 3152 list_for_each_entry_rcu(rule, &chain->rules, list) {
3153 if (!nft_is_active(net, rule))
2c82c7e7 3154 goto cont_skip;
241faece
PS		 3155 if (*idx < s_idx)
3156 goto cont;
3157 if (*idx > s_idx) {
3158 memset(&cb->args[1], 0,
3159 sizeof(cb->args) - sizeof(cb->args[0]));
3160 }
e189ae16
PNA		 3161 if (prule)
3162 handle = prule->handle;
3163 else
3164 handle = 0;
3165
241faece
PS		 3166 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3167 cb->nlh->nlmsg_seq,
3168 NFT_MSG_NEWRULE,
3169 NLM_F_MULTI | NLM_F_APPEND,
3170 table->family,
8daa8fde 3171 table, chain, rule, handle, reset) < 0)
310529e6 3172 return 1;
241faece
PS		 3173
3174 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3175cont:
2c82c7e7
FW		 3176 prule = rule;
3177cont_skip:
241faece
PS		 3178 (*idx)++;
3179 }
310529e6 3180 return 0;
241faece
PS		 3181}
3182
96518518
PM		 3183static int nf_tables_dump_rules(struct sk_buff *skb,
3184 struct netlink_callback *cb)
3185{
3186 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6e1f760e 3187 const struct nft_rule_dump_ctx *ctx = cb->data;
241faece 3188 struct nft_table *table;
96518518 3189 const struct nft_chain *chain;
241faece 3190 unsigned int idx = 0;
99633ab2 3191 struct net *net = sock_net(skb->sk);
96518518 3192 int family = nfmsg->nfgen_family;
0854db2a 3193 struct nftables_pernet *nft_net;
8daa8fde
PS		 3194 bool reset = false;
3195
3196 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3197 reset = true;
96518518 3198
e688a7f8 3199 rcu_read_lock();
d59d2f82 3200 nft_net = nft_pernet(net);
34002783 3201 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3202
0854db2a 3203 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3204 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3205 continue;
3206
3207 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3208 continue;
3209
715849ab 3210 if (ctx && ctx->table && ctx->chain) {
241faece 3211 struct rhlist_head *list, *tmp;
6e1f760e 3212
241faece
PS		 3213 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3214 nft_chain_ht_params);
3215 if (!list)
3216 goto done;
3217
3218 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3219 if (!nft_is_active(net, chain))
3220 continue;
3221 __nf_tables_dump_rules(skb, &idx,
8daa8fde 3222 cb, table, chain, reset);
241faece 3223 break;
96518518 3224 }
241faece 3225 goto done;
96518518 3226 }
241faece
PS		 3227
3228 list_for_each_entry_rcu(chain, &table->chains, list) {
8daa8fde
PS		 3229 if (__nf_tables_dump_rules(skb, &idx,
3230 cb, table, chain, reset))
241faece
PS		 3231 goto done;
3232 }
3233
3234 if (ctx && ctx->table)
3235 break;
96518518
PM		 3236 }
3237done:
e688a7f8 3238 rcu_read_unlock();
310529e6
PS		 3239
3240 cb->args[0] = idx;
96518518
PM		 3241 return skb->len;
3242}
3243
90fd131a
FW		 3244static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3245{
3246 const struct nlattr * const *nla = cb->data;
3247 struct nft_rule_dump_ctx *ctx = NULL;
3248
3249 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3250 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3251 if (!ctx)
3252 return -ENOMEM;
3253
3254 if (nla[NFTA_RULE_TABLE]) {
3255 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3256 GFP_ATOMIC);
3257 if (!ctx->table) {
3258 kfree(ctx);
3259 return -ENOMEM;
3260 }
3261 }
3262 if (nla[NFTA_RULE_CHAIN]) {
3263 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3264 GFP_ATOMIC);
3265 if (!ctx->chain) {
3266 kfree(ctx->table);
3267 kfree(ctx);
3268 return -ENOMEM;
3269 }
3270 }
3271 }
3272
3273 cb->data = ctx;
3274 return 0;
3275}
3276
6e1f760e
PNA		 3277static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3278{
e46abbcc
PS		 3279 struct nft_rule_dump_ctx *ctx = cb->data;
3280
3281 if (ctx) {
3282 kfree(ctx->table);
b7263e07 3283 kfree(ctx->chain);
e46abbcc
PS		 3284 kfree(ctx);
3285 }
6e1f760e
PNA		 3286 return 0;
3287}
3288
d9adf22a 3289/* called with rcu_read_lock held */
797d4980
PNA		 3290static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3291 const struct nlattr * const nla[])
96518518 3292{
797d4980
PNA		 3293 struct netlink_ext_ack *extack = info->extack;
3294 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3295 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3296 const struct nft_chain *chain;
3297 const struct nft_rule *rule;
797d4980 3298 struct net *net = info->net;
1b2470e5 3299 struct nft_table *table;
96518518 3300 struct sk_buff *skb2;
8daa8fde 3301 bool reset = false;
96518518
PM		 3302 int err;
3303
797d4980 3304 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518 3305 struct netlink_dump_control c = {
90fd131a 3306 .start= nf_tables_dump_rules_start,
96518518 3307 .dump = nf_tables_dump_rules,
6e1f760e 3308 .done = nf_tables_dump_rules_done,
d9adf22a 3309 .module = THIS_MODULE,
90fd131a 3310 .data = (void *)nla,
96518518 3311 };
6e1f760e 3312
797d4980 3313 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 3314 }
3315
6001a930 3316 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3317 if (IS_ERR(table)) {
3318 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3319 return PTR_ERR(table);
36dd1bcc 3320 }
96518518 3321
f102d66b 3322 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3323 if (IS_ERR(chain)) {
3324 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
96518518 3325 return PTR_ERR(chain);
36dd1bcc 3326 }
96518518 3327
cac20fcd 3328 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3329 if (IS_ERR(rule)) {
3330 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3331 return PTR_ERR(rule);
36dd1bcc 3332 }
96518518 3333
d9adf22a 3334 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 3335 if (!skb2)
3336 return -ENOMEM;
3337
8daa8fde
PS		 3338 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETRULE_RESET)
3339 reset = true;
3340
84d7fce6 3341 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 3342 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
8daa8fde 3343 family, table, chain, rule, 0, reset);
96518518 3344 if (err < 0)
ee921183 3345 goto err_fill_rule_info;
96518518 3346
ee921183 3347 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 3348
ee921183 3349err_fill_rule_info:
96518518
PM		 3350 kfree_skb(skb2);
3351 return err;
3352}
3353
62472bce
PM		 3354static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
3355 struct nft_rule *rule)
96518518 3356{
29e38801 3357 struct nft_expr *expr, *next;
96518518
PM		 3358
3359 /*
3360 * Careful: some expressions might not be initialized in case this
3361 * is called on error from nf_tables_newrule().
3362 */
3363 expr = nft_expr_first(rule);
31cc578a 3364 while (nft_expr_more(rule, expr)) {
29e38801 3365 next = nft_expr_next(expr);
62472bce 3366 nf_tables_expr_destroy(ctx, expr);
29e38801 3367 expr = next;
96518518
PM		 3368 }
3369 kfree(rule);
3370}
3371
d0e2c7de 3372void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3373{
f6ac8585 3374 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3375 nf_tables_rule_destroy(ctx, rule);
3376}
3377
a654de8f
PNA		 3378int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3379{
3380 struct nft_expr *expr, *last;
3381 const struct nft_data *data;
3382 struct nft_rule *rule;
3383 int err;
3384
26b2f552
TY		 3385 if (ctx->level == NFT_JUMP_STACK_SIZE)
3386 return -EMLINK;
3387
a654de8f
PNA		 3388 list_for_each_entry(rule, &chain->rules, list) {
3389 if (!nft_is_active_next(ctx->net, rule))
3390 continue;
3391
3392 nft_rule_for_each_expr(expr, last, rule) {
3393 if (!expr->ops->validate)
3394 continue;
3395
3396 err = expr->ops->validate(ctx, expr, &data);
3397 if (err < 0)
3398 return err;
3399 }
81ea0106
FW		 3400
3401 cond_resched();
a654de8f
PNA		 3402 }
3403
3404 return 0;
3405}
3406EXPORT_SYMBOL_GPL(nft_chain_validate);
3407
3408static int nft_table_validate(struct net *net, const struct nft_table *table)
3409{
3410 struct nft_chain *chain;
3411 struct nft_ctx ctx = {
3412 .net = net,
3413 .family = table->family,
3414 };
3415 int err;
3416
3417 list_for_each_entry(chain, &table->chains, list) {
3418 if (!nft_is_base_chain(chain))
3419 continue;
3420
3421 ctx.chain = chain;
3422 err = nft_chain_validate(&ctx, chain);
3423 if (err < 0)
3424 return err;
3425 }
3426
3427 return 0;
3428}
3429
75dd48e2 3430static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3431 const struct nft_chain *chain,
75dd48e2
PS		 3432 const struct nlattr *nla);
3433
1081d11b
PNA		 3434#define NFT_RULE_MAXEXPRS 128
3435
7dab8ee3
PNA		 3436static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3437 const struct nlattr * const nla[])
96518518 3438{
7dab8ee3 3439 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3440 struct netlink_ext_ack *extack = info->extack;
3441 unsigned int size, i, n, ulen = 0, usize = 0;
3442 u8 genmask = nft_genmask_next(info->net);
3443 struct nft_rule *rule, *old_rule = NULL;
3444 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3445 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3446 struct nft_flow_rule *flow = NULL;
7dab8ee3 3447 struct net *net = info->net;
7dab8ee3 3448 struct nft_userdata *udata;
96518518
PM		 3449 struct nft_table *table;
3450 struct nft_chain *chain;
7dab8ee3
PNA		 3451 struct nft_trans *trans;
3452 u64 handle, pos_handle;
96518518
PM		 3453 struct nft_expr *expr;
3454 struct nft_ctx ctx;
3455 struct nlattr *tmp;
96518518 3456 int err, rem;
96518518 3457
0854db2a 3458 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3459
6001a930
PNA		 3460 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3461 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3462 if (IS_ERR(table)) {
3463 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3464 return PTR_ERR(table);
36dd1bcc 3465 }
96518518 3466
837830a4
PNA		 3467 if (nla[NFTA_RULE_CHAIN]) {
3468 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3469 genmask);
3470 if (IS_ERR(chain)) {
3471 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3472 return PTR_ERR(chain);
3473 }
d0e2c7de
PNA		 3474 if (nft_chain_is_bound(chain))
3475 return -EOPNOTSUPP;
3476
837830a4 3477 } else if (nla[NFTA_RULE_CHAIN_ID]) {
95f466d2 3478 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
837830a4
PNA		 3479 if (IS_ERR(chain)) {
3480 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3481 return PTR_ERR(chain);
3482 }
3483 } else {
3484 return -EINVAL;
36dd1bcc 3485 }
96518518
PM		 3486
3487 if (nla[NFTA_RULE_HANDLE]) {
3488 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3489 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3490 if (IS_ERR(rule)) {
3491 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3492 return PTR_ERR(rule);
36dd1bcc 3493 }
96518518 3494
7dab8ee3 3495 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3496 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3497 return -EEXIST;
36dd1bcc 3498 }
7dab8ee3 3499 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3500 old_rule = rule;
3501 else
3502 return -EOPNOTSUPP;
3503 } else {
7dab8ee3
PNA		 3504 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3505 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3506 return -EINVAL;
3507 handle = nf_tables_alloc_handle(table);
a0a7379e
PNA		 3508
3509 if (chain->use == UINT_MAX)
3510 return -EOVERFLOW;
5e948466 3511
447750f2
FW		 3512 if (nla[NFTA_RULE_POSITION]) {
3513 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3514 old_rule = __nft_rule_lookup(chain, pos_handle);
3515 if (IS_ERR(old_rule)) {
3516 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3517 return PTR_ERR(old_rule);
3518 }
75dd48e2 3519 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3520 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3521 if (IS_ERR(old_rule)) {
3522 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3523 return PTR_ERR(old_rule);
3524 }
36dd1bcc 3525 }
5e948466
EL		 3526 }
3527
7dab8ee3 3528 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3529
96518518
PM		 3530 n = 0;
3531 size = 0;
3532 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3533 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3534 sizeof(struct nft_expr_info),
3535 GFP_KERNEL);
3536 if (!expr_info)
2a43ecf9
FW		 3537 return -ENOMEM;
3538
96518518
PM		 3539 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3540 err = -EINVAL;
3541 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3542 goto err_release_expr;
96518518 3543 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3544 goto err_release_expr;
7dab8ee3 3545 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3546 if (err < 0) {
3547 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3548 goto err_release_expr;
c781471d 3549 }
7dab8ee3 3550 size += expr_info[n].ops->size;
96518518
PM		 3551 n++;
3552 }
3553 }
9889840f
PM		 3554 /* Check for overflow of dlen field */
3555 err = -EFBIG;
3556 if (size >= 1 << 12)
3c5e4462 3557 goto err_release_expr;
96518518 3558
86f1ec32 3559 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3560 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3561 if (ulen > 0)
3562 usize = sizeof(struct nft_userdata) + ulen;
3563 }
0768b3b3 3564
96518518 3565 err = -ENOMEM;
33758c89 3566 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3567 if (rule == NULL)
3c5e4462 3568 goto err_release_expr;
96518518 3569
889f7ee7 3570 nft_activate_next(net, rule);
0628b123 3571
96518518
PM		 3572 rule->handle = handle;
3573 rule->dlen = size;
86f1ec32 3574 rule->udata = ulen ? 1 : 0;
0768b3b3 3575
86f1ec32
PM		 3576 if (ulen) {
3577 udata = nft_userdata(rule);
3578 udata->len = ulen - 1;
3579 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3580 }
96518518 3581
96518518
PM		 3582 expr = nft_expr_first(rule);
3583 for (i = 0; i < n; i++) {
7dab8ee3 3584 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 3585 if (err < 0) {
7dab8ee3 3586 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 3587 goto err_release_rule;
83d9dcba 3588 }
a654de8f 3589
7dab8ee3 3590 if (expr_info[i].ops->validate)
a654de8f
PNA		 3591 nft_validate_state_update(net, NFT_VALIDATE_NEED);
3592
7dab8ee3 3593 expr_info[i].ops = NULL;
96518518
PM		 3594 expr = nft_expr_next(expr);
3595 }
3596
3c5e4462
PNA		 3597 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3598 flow = nft_flow_rule_create(net, rule);
3599 if (IS_ERR(flow)) {
3600 err = PTR_ERR(flow);
3601 goto err_release_rule;
3602 }
3603 }
3604
7dab8ee3 3605 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
2c964c55
PNA		 3606 err = nft_delrule(&ctx, old_rule);
3607 if (err < 0)
3608 goto err_destroy_flow_rule;
3609
ca089878 3610 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 3611 if (trans == NULL) {
3612 err = -ENOMEM;
3c5e4462 3613 goto err_destroy_flow_rule;
569ccae6 3614 }
569ccae6
FW		 3615 list_add_tail_rcu(&rule->list, &old_rule->list);
3616 } else {
c9626a2c
PNA		 3617 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3618 if (!trans) {
569ccae6 3619 err = -ENOMEM;
3c5e4462 3620 goto err_destroy_flow_rule;
569ccae6
FW		 3621 }
3622
7dab8ee3 3623 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 3624 if (old_rule)
3625 list_add_rcu(&rule->list, &old_rule->list);
3626 else
3627 list_add_tail_rcu(&rule->list, &chain->rules);
3628 } else {
3629 if (old_rule)
3630 list_add_tail_rcu(&rule->list, &old_rule->list);
3631 else
3632 list_add_rcu(&rule->list, &chain->rules);
3633 }
0628b123 3634 }
7dab8ee3 3635 kvfree(expr_info);
4fefee57 3636 chain->use++;
96518518 3637
3c5e4462
PNA		 3638 if (flow)
3639 nft_trans_flow_rule(trans) = flow;
3640
0854db2a 3641 if (nft_net->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 3642 return nft_table_validate(net, table);
3643
3644 return 0;
3c5e4462
PNA		 3645
3646err_destroy_flow_rule:
4ca041f9
CIK		 3647 if (flow)
3648 nft_flow_rule_destroy(flow);
3c5e4462 3649err_release_rule:
bb7b40ae 3650 nf_tables_rule_release(&ctx, rule);
3c5e4462 3651err_release_expr:
96518518 3652 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 3653 if (expr_info[i].ops) {
3654 module_put(expr_info[i].ops->type->owner);
3655 if (expr_info[i].ops->type->release_ops)
3656 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 3657 }
96518518 3658 }
7dab8ee3
PNA		 3659 kvfree(expr_info);
3660
96518518
PM		 3661 return err;
3662}
3663
1a94e38d 3664static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3665 const struct nft_chain *chain,
1a94e38d
PNA		 3666 const struct nlattr *nla)
3667{
d59d2f82 3668 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 3669 u32 id = ntohl(nla_get_be32(nla));
3670 struct nft_trans *trans;
3671
0854db2a 3672 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d
PNA		 3673 struct nft_rule *rule = nft_trans_rule(trans);
3674
3675 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 3676 trans->ctx.chain == chain &&
1a94e38d
PNA		 3677 id == nft_trans_rule_id(trans))
3678 return rule;
3679 }
3680 return ERR_PTR(-ENOENT);
3681}
3682
7dab8ee3
PNA		 3683static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3684 const struct nlattr * const nla[])
96518518 3685{
7dab8ee3 3686 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 3687 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 3688 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 3689 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 3690 struct net *net = info->net;
3691 struct nft_table *table;
cf9dc09d 3692 struct nft_rule *rule;
0628b123 3693 struct nft_ctx ctx;
ef4b65e5 3694 int err = 0;
96518518 3695
6001a930
PNA		 3696 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3697 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3698 if (IS_ERR(table)) {
3699 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3700 return PTR_ERR(table);
36dd1bcc 3701 }
96518518 3702
cf9dc09d 3703 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 3704 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3705 genmask);
36dd1bcc
PNA		 3706 if (IS_ERR(chain)) {
3707 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 3708 return PTR_ERR(chain);
36dd1bcc 3709 }
d0e2c7de
PNA		 3710 if (nft_chain_is_bound(chain))
3711 return -EOPNOTSUPP;
cf9dc09d 3712 }
96518518 3713
7dab8ee3 3714 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 3715
cf9dc09d
PNA		 3716 if (chain) {
3717 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 3718 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3719 if (IS_ERR(rule)) {
3720 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 3721 return PTR_ERR(rule);
36dd1bcc 3722 }
96518518 3723
1a94e38d
PNA		 3724 err = nft_delrule(&ctx, rule);
3725 } else if (nla[NFTA_RULE_ID]) {
36d5b291 3726 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 3727 if (IS_ERR(rule)) {
3728 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 3729 return PTR_ERR(rule);
36dd1bcc 3730 }
1a94e38d 3731
5e266fe7 3732 err = nft_delrule(&ctx, rule);
cf9dc09d 3733 } else {
ce24b721 3734 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 3735 }
3736 } else {
3737 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 3738 if (!nft_is_active_next(net, chain))
3739 continue;
3740
cf9dc09d 3741 ctx.chain = chain;
ce24b721 3742 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 3743 if (err < 0)
3744 break;
3745 }
3746 }
3747
3748 return err;
3749}
3750
20a69341
PM		 3751/*
3752 * Sets
3753 */
e32a4dc6
FW		 3754static const struct nft_set_type *nft_set_types[] = {
3755 &nft_set_hash_fast_type,
3756 &nft_set_hash_type,
3757 &nft_set_rhash_type,
3758 &nft_set_bitmap_type,
3759 &nft_set_rbtree_type,
e6abef61 3760#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 3761 &nft_set_pipapo_avx2_type,
3762#endif
e32a4dc6
FW		 3763 &nft_set_pipapo_type,
3764};
20a69341 3765
2b664957 3766#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 3767 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3768 NFT_SET_EVAL)
2b664957 3769
71cc0873 3770static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 3771{
71cc0873 3772 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 3773}
3774
c50b960c
PM		 3775/*
3776 * Select a set implementation based on the data characteristics and the
3777 * given policy. The total memory use might not be known if no size is
3778 * given, in that case the amount of memory per element is used.
3779 */
3780static const struct nft_set_ops *
2b664957
PNA		 3781nft_select_set_ops(const struct nft_ctx *ctx,
3782 const struct nlattr * const nla[],
c50b960c
PM		 3783 const struct nft_set_desc *desc,
3784 enum nft_set_policies policy)
20a69341 3785{
d59d2f82 3786 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 3787 const struct nft_set_ops *ops, *bops;
3788 struct nft_set_estimate est, best;
2b664957
PNA		 3789 const struct nft_set_type *type;
3790 u32 flags = 0;
e32a4dc6 3791 int i;
20a69341 3792
0854db2a 3793 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3794 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 3795
2b664957
PNA		 3796 if (nla[NFTA_SET_FLAGS] != NULL)
3797 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 3798
55af753c
PNA		 3799 bops = NULL;
3800 best.size = ~0;
3801 best.lookup = ~0;
0b5a7874 3802 best.space = ~0;
c50b960c 3803
e32a4dc6
FW		 3804 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
3805 type = nft_set_types[i];
71cc0873 3806 ops = &type->ops;
2b664957 3807
71cc0873 3808 if (!nft_set_ops_candidate(type, flags))
20a69341 3809 continue;
2b664957 3810 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 3811 continue;
3812
3813 switch (policy) {
3814 case NFT_SET_POL_PERFORMANCE:
55af753c 3815 if (est.lookup < best.lookup)
c50b960c 3816 break;
644e334e
PNA		 3817 if (est.lookup == best.lookup &&
3818 est.space < best.space)
3819 break;
c50b960c
PM		 3820 continue;
3821 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 3822 if (!desc->size) {
3823 if (est.space < best.space)
3824 break;
3825 if (est.space == best.space &&
3826 est.lookup < best.lookup)
3827 break;
4f2921ca 3828 } else if (est.size < best.size || !bops) {
c50b960c 3829 break;
0b5a7874 3830 }
c50b960c
PM		 3831 continue;
3832 default:
3833 break;
3834 }
3835
c50b960c
PM		 3836 bops = ops;
3837 best = est;
20a69341
PM		 3838 }
3839
c50b960c
PM		 3840 if (bops != NULL)
3841 return bops;
3842
20a69341
PM		 3843 return ERR_PTR(-EOPNOTSUPP);
3844}
3845
3846static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 3847 [NFTA_SET_TABLE] = { .type = NLA_STRING,
3848 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 3849 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 3850 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 3851 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
3852 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
3853 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
3854 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
3855 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 3856 [NFTA_SET_POLICY] = { .type = NLA_U32 },
3857 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 3858 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 3859 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
3860 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 3861 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
3862 .len = NFT_USERDATA_MAXLEN },
8aeff920 3863 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 3864 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 3865 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
48b0ae04 3866 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
c50b960c
PM		 3867};
3868
3869static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
3870 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
f3a2181e 3871 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
20a69341
PM		 3872};
3873
cac20fcd
PNA		 3874static struct nft_set *nft_set_lookup(const struct nft_table *table,
3875 const struct nlattr *nla, u8 genmask)
20a69341
PM		 3876{
3877 struct nft_set *set;
3878
3879 if (nla == NULL)
3880 return ERR_PTR(-EINVAL);
3881
d9adf22a 3882 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 3883 if (!nla_strcmp(nla, set->name) &&
3884 nft_active_genmask(set, genmask))
20a69341
PM		 3885 return set;
3886 }
3887 return ERR_PTR(-ENOENT);
3888}
3889
cac20fcd
PNA		 3890static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
3891 const struct nlattr *nla,
3892 u8 genmask)
3ecbfd65
HS		 3893{
3894 struct nft_set *set;
3895
3ecbfd65
HS		 3896 list_for_each_entry(set, &table->sets, list) {
3897 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
3898 nft_active_genmask(set, genmask))
3899 return set;
3900 }
3901 return ERR_PTR(-ENOENT);
3902}
3903
cac20fcd 3904static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 3905 const struct nft_table *table,
cac20fcd 3906 const struct nlattr *nla, u8 genmask)
958bee14 3907{
d59d2f82 3908 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 3909 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 3910 struct nft_trans *trans;
958bee14 3911
0854db2a 3912 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 3913 if (trans->msg_type == NFT_MSG_NEWSET) {
3914 struct nft_set *set = nft_trans_set(trans);
37a9cc52 3915
9c7f96fd 3916 if (id == nft_trans_set_id(trans) &&
470ee20e 3917 set->table == table &&
9c7f96fd
AK		 3918 nft_active_genmask(set, genmask))
3919 return set;
3920 }
958bee14
PNA		 3921 }
3922 return ERR_PTR(-ENOENT);
3923}
c7a72e3f 3924
10659cba
PNA		 3925struct nft_set *nft_set_lookup_global(const struct net *net,
3926 const struct nft_table *table,
3927 const struct nlattr *nla_set_name,
3928 const struct nlattr *nla_set_id,
3929 u8 genmask)
c7a72e3f
PNA		 3930{
3931 struct nft_set *set;
3932
cac20fcd 3933 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 3934 if (IS_ERR(set)) {
3935 if (!nla_set_id)
3936 return set;
3937
470ee20e 3938 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 3939 }
3940 return set;
3941}
10659cba 3942EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 3943
20a69341
PM		 3944static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
3945 const char *name)
3946{
3947 const struct nft_set *i;
3948 const char *p;
3949 unsigned long *inuse;
60eb1894 3950 unsigned int n = 0, min = 0;
20a69341 3951
38745490 3952 p = strchr(name, '%');
20a69341
PM		 3953 if (p != NULL) {
3954 if (p[1] != 'd' || strchr(p + 2, '%'))
3955 return -EINVAL;
3956
3957 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
3958 if (inuse == NULL)
3959 return -ENOMEM;
60eb1894 3960cont:
20a69341 3961 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 3962 int tmp;
3963
271c5ca8 3964 if (!nft_is_active_next(ctx->net, i))
37a9cc52 3965 continue;
14662917 3966 if (!sscanf(i->name, name, &tmp))
20a69341 3967 continue;
60eb1894 3968 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 3969 continue;
14662917 3970
60eb1894 3971 set_bit(tmp - min, inuse);
20a69341
PM		 3972 }
3973
53b70287 3974 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 3975 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
3976 min += BITS_PER_BYTE * PAGE_SIZE;
3977 memset(inuse, 0, PAGE_SIZE);
3978 goto cont;
3979 }
20a69341
PM		 3980 free_page((unsigned long)inuse);
3981 }
3982
33758c89 3983 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 3984 if (!set->name)
3985 return -ENOMEM;
3986
20a69341 3987 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 3988 if (!nft_is_active_next(ctx->net, i))
3989 continue;
e63aaaa6
AY		 3990 if (!strcmp(set->name, i->name)) {
3991 kfree(set->name);
7fb6f78d 3992 set->name = NULL;
20a69341 3993 return -ENFILE;
e63aaaa6 3994 }
20a69341
PM		 3995 }
3996 return 0;
3997}
3998
917d80d3 3999int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 4000{
4001 u64 ms = be64_to_cpu(nla_get_be64(nla));
4002 u64 max = (u64)(~((u64)0));
4003
4004 max = div_u64(max, NSEC_PER_MSEC);
4005 if (ms >= max)
4006 return -ERANGE;
4007
4008 ms *= NSEC_PER_MSEC;
4009 *result = nsecs_to_jiffies64(ms);
4010 return 0;
4011}
4012
917d80d3 4013__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 4014{
3b15d09f 4015 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 4016}
4017
f3a2181e
SB		 4018static int nf_tables_fill_set_concat(struct sk_buff *skb,
4019 const struct nft_set *set)
4020{
4021 struct nlattr *concat, *field;
4022 int i;
4023
4024 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4025 if (!concat)
4026 return -ENOMEM;
4027
4028 for (i = 0; i < set->field_count; i++) {
4029 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4030 if (!field)
4031 return -ENOMEM;
4032
4033 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4034 htonl(set->field_len[i])))
4035 return -ENOMEM;
4036
4037 nla_nest_end(skb, field);
4038 }
4039
4040 nla_nest_end(skb, concat);
4041
4042 return 0;
4043}
4044
20a69341
PM		 4045static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4046 const struct nft_set *set, u16 event, u16 flags)
4047{
20a69341 4048 struct nlmsghdr *nlh;
128ad332 4049 u32 portid = ctx->portid;
65038428 4050 struct nlattr *nest;
128ad332 4051 u32 seq = ctx->seq;
48b0ae04 4052 int i;
20a69341 4053
dedb67c4 4054 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4055 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4056 NFNETLINK_V0, nft_base_seq(ctx->net));
4057 if (!nlh)
20a69341
PM		 4058 goto nla_put_failure;
4059
20a69341
PM		 4060 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4061 goto nla_put_failure;
4062 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4063 goto nla_put_failure;
3ecbfd65
HS		 4064 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4065 NFTA_SET_PAD))
4066 goto nla_put_failure;
20a69341
PM		 4067 if (set->flags != 0)
4068 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4069 goto nla_put_failure;
4070
4071 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4072 goto nla_put_failure;
4073 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4074 goto nla_put_failure;
4075 if (set->flags & NFT_SET_MAP) {
4076 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4077 goto nla_put_failure;
4078 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4079 goto nla_put_failure;
4080 }
8aeff920
PNA		 4081 if (set->flags & NFT_SET_OBJECT &&
4082 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4083 goto nla_put_failure;
20a69341 4084
761da293 4085 if (set->timeout &&
d3e2a111 4086 nla_put_be64(skb, NFTA_SET_TIMEOUT,
8e1102d5 4087 nf_jiffies64_to_msecs(set->timeout),
b46f6ded 4088 NFTA_SET_PAD))
761da293
PM		 4089 goto nla_put_failure;
4090 if (set->gc_int &&
4091 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int)))
4092 goto nla_put_failure;
4093
9363dc4b
AB		 4094 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4095 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4096 goto nla_put_failure;
4097 }
4098
6f03bf43
PNA		 4099 if (set->udata &&
4100 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4101 goto nla_put_failure;
4102
65038428
PNA		 4103 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4104 if (!nest)
c50b960c
PM		 4105 goto nla_put_failure;
4106 if (set->size &&
4107 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4108 goto nla_put_failure;
f3a2181e
SB		 4109
4110 if (set->field_count > 1 &&
4111 nf_tables_fill_set_concat(skb, set))
4112 goto nla_put_failure;
4113
65038428
PNA		 4114 nla_nest_end(skb, nest);
4115
8cfd9b0f 4116 if (set->num_exprs == 1) {
65038428 4117 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8daa8fde 4118 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
65038428
PNA		 4119 goto nla_put_failure;
4120
4121 nla_nest_end(skb, nest);
48b0ae04
PNA		 4122 } else if (set->num_exprs > 1) {
4123 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4124 if (nest == NULL)
65038428
PNA		 4125 goto nla_put_failure;
4126
48b0ae04
PNA		 4127 for (i = 0; i < set->num_exprs; i++) {
4128 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
8daa8fde 4129 set->exprs[i], false) < 0)
48b0ae04
PNA		 4130 goto nla_put_failure;
4131 }
65038428
PNA		 4132 nla_nest_end(skb, nest);
4133 }
c50b960c 4134
053c095a
JB		 4135 nlmsg_end(skb, nlh);
4136 return 0;
20a69341
PM		 4137
4138nla_put_failure:
4139 nlmsg_trim(skb, nlh);
4140 return -1;
4141}
4142
25e94a99
PNA		 4143static void nf_tables_set_notify(const struct nft_ctx *ctx,
4144 const struct nft_set *set, int event,
4145 gfp_t gfp_flags)
20a69341 4146{
d59d2f82 4147 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4148 u32 portid = ctx->portid;
6fb721cf
PNA		 4149 struct sk_buff *skb;
4150 u16 flags = 0;
20a69341
PM		 4151 int err;
4152
128ad332
PNA		 4153 if (!ctx->report &&
4154 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4155 return;
20a69341 4156
31f8441c 4157 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4158 if (skb == NULL)
4159 goto err;
4160
6fb721cf
PNA		 4161 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4162 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4163
4164 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4165 if (err < 0) {
4166 kfree_skb(skb);
4167 goto err;
4168 }
4169
0854db2a 4170 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4171 return;
20a69341 4172err:
25e94a99 4173 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4174}
4175
5b96af77 4176static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4177{
4178 const struct nft_set *set;
4179 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4180 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4181 struct net *net = sock_net(skb->sk);
5b96af77 4182 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4183 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4184
4185 if (cb->args[1])
4186 return skb->len;
4187
e688a7f8 4188 rcu_read_lock();
d59d2f82 4189 nft_net = nft_pernet(net);
34002783 4190 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4191
0854db2a 4192 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4193 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4194 ctx->family != table->family)
36596dad
PNA		 4195 continue;
4196
4197 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4198 continue;
4199
36596dad
PNA		 4200 if (cur_table) {
4201 if (cur_table != table)
c9c8e485
PNA		 4202 continue;
4203
36596dad 4204 cur_table = NULL;
c9c8e485 4205 }
36596dad
PNA		 4206 idx = 0;
4207 list_for_each_entry_rcu(set, &table->sets, list) {
4208 if (idx < s_idx)
4209 goto cont;
4210 if (!nft_is_active(net, set))
4211 goto cont;
5b96af77 4212
36596dad
PNA		 4213 ctx_set = *ctx;
4214 ctx_set.table = table;
98319cb9 4215 ctx_set.family = table->family;
c9c8e485 4216
36596dad
PNA		 4217 if (nf_tables_fill_set(skb, &ctx_set, set,
4218 NFT_MSG_NEWSET,
4219 NLM_F_MULTI) < 0) {
4220 cb->args[0] = idx;
4221 cb->args[2] = (unsigned long) table;
4222 goto done;
c9c8e485 4223 }
36596dad 4224 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4225cont:
36596dad 4226 idx++;
c9c8e485 4227 }
36596dad
PNA		 4228 if (s_idx)
4229 s_idx = 0;
c9c8e485
PNA		 4230 }
4231 cb->args[1] = 1;
4232done:
e688a7f8 4233 rcu_read_unlock();
c9c8e485
PNA		 4234 return skb->len;
4235}
4236
90fd131a
FW		 4237static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4238{
4239 struct nft_ctx *ctx_dump = NULL;
4240
4241 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4242 if (ctx_dump == NULL)
4243 return -ENOMEM;
4244
4245 cb->data = ctx_dump;
4246 return 0;
4247}
4248
5b96af77 4249static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4250{
5b96af77
PNA		 4251 kfree(cb->data);
4252 return 0;
20a69341
PM		 4253}
4254
d9adf22a 4255/* called with rcu_read_lock held */
797d4980
PNA		 4256static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4257 const struct nlattr * const nla[])
20a69341 4258{
797d4980
PNA		 4259 struct netlink_ext_ack *extack = info->extack;
4260 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4261 u8 family = info->nfmsg->nfgen_family;
4262 struct nft_table *table = NULL;
797d4980 4263 struct net *net = info->net;
20a69341 4264 const struct nft_set *set;
20a69341 4265 struct sk_buff *skb2;
797d4980 4266 struct nft_ctx ctx;
20a69341
PM		 4267 int err;
4268
67086651
PNA		 4269 if (nla[NFTA_SET_TABLE]) {
4270 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4271 genmask, 0);
4272 if (IS_ERR(table)) {
4273 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4274 return PTR_ERR(table);
4275 }
4276 }
4277
4278 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4279
797d4980 4280 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4281 struct netlink_dump_control c = {
90fd131a 4282 .start = nf_tables_dump_sets_start,
20a69341 4283 .dump = nf_tables_dump_sets,
5b96af77 4284 .done = nf_tables_dump_sets_done,
90fd131a 4285 .data = &ctx,
d9adf22a 4286 .module = THIS_MODULE,
20a69341 4287 };
5b96af77 4288
797d4980 4289 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4290 }
4291
c9c8e485 4292 /* Only accept unspec with dump */
ef4b65e5 4293 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4294 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4295 if (!nla[NFTA_SET_TABLE])
4296 return -EINVAL;
c9c8e485 4297
67086651 4298 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341
PM		 4299 if (IS_ERR(set))
4300 return PTR_ERR(set);
4301
d9adf22a 4302 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4303 if (skb2 == NULL)
4304 return -ENOMEM;
4305
4306 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4307 if (err < 0)
ee921183 4308 goto err_fill_set_info;
20a69341 4309
ee921183 4310 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4311
ee921183 4312err_fill_set_info:
20a69341
PM		 4313 kfree_skb(skb2);
4314 return err;
4315}
4316
f3a2181e
SB		 4317static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4318 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4319};
4320
4321static int nft_set_desc_concat_parse(const struct nlattr *attr,
4322 struct nft_set_desc *desc)
4323{
4324 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4325 u32 len;
4326 int err;
4327
fecf31ee
PNA		 4328 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4329 return -E2BIG;
4330
f3a2181e
SB		 4331 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4332 nft_concat_policy, NULL);
4333 if (err < 0)
4334 return err;
4335
4336 if (!tb[NFTA_SET_FIELD_LEN])
4337 return -EINVAL;
4338
4339 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4340 if (!len || len > U8_MAX)
4341 return -EINVAL;
f3a2181e
SB		 4342
4343 desc->field_len[desc->field_count++] = len;
4344
4345 return 0;
4346}
4347
4348static int nft_set_desc_concat(struct nft_set_desc *desc,
4349 const struct nlattr *nla)
4350{
4351 struct nlattr *attr;
fecf31ee
PNA		 4352 u32 num_regs = 0;
4353 int rem, err, i;
f3a2181e
SB		 4354
4355 nla_for_each_nested(attr, nla, rem) {
4356 if (nla_type(attr) != NFTA_LIST_ELEM)
4357 return -EINVAL;
4358
4359 err = nft_set_desc_concat_parse(attr, desc);
4360 if (err < 0)
4361 return err;
4362 }
4363
fecf31ee
PNA		 4364 for (i = 0; i < desc->field_count; i++)
4365 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4366
4367 if (num_regs > NFT_REG32_COUNT)
4368 return -E2BIG;
4369
f3a2181e
SB		 4370 return 0;
4371}
4372
f7e840ee 4373static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4374 const struct nlattr *nla)
4375{
4376 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4377 int err;
4378
8cb08174
JB		 4379 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4380 nft_set_desc_policy, NULL);
c50b960c
PM		 4381 if (err < 0)
4382 return err;
4383
4384 if (da[NFTA_SET_DESC_SIZE] != NULL)
4385 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4386 if (da[NFTA_SET_DESC_CONCAT])
4387 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4388
f3a2181e 4389 return err;
c50b960c
PM		 4390}
4391
7dab8ee3
PNA		 4392static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4393 const struct nlattr * const nla[])
20a69341 4394{
7dab8ee3
PNA		 4395 u32 ktype, dtype, flags, policy, gc_int, objtype;
4396 struct netlink_ext_ack *extack = info->extack;
4397 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4398 u8 family = info->nfmsg->nfgen_family;
20a69341 4399 const struct nft_set_ops *ops;
65038428 4400 struct nft_expr *expr = NULL;
7dab8ee3
PNA		 4401 struct net *net = info->net;
4402 struct nft_set_desc desc;
20a69341 4403 struct nft_table *table;
7dab8ee3 4404 unsigned char *udata;
20a69341
PM		 4405 struct nft_set *set;
4406 struct nft_ctx ctx;
6c8774a9 4407 size_t alloc_size;
761da293 4408 u64 timeout;
7dab8ee3
PNA		 4409 char *name;
4410 int err, i;
e6d8ecac 4411 u16 udlen;
7dab8ee3 4412 u64 size;
20a69341
PM		 4413
4414 if (nla[NFTA_SET_TABLE] == NULL ||
4415 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4416 nla[NFTA_SET_KEY_LEN] == NULL ||
4417 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4418 return -EINVAL;
4419
c50b960c
PM		 4420 memset(&desc, 0, sizeof(desc));
4421
20a69341
PM		 4422 ktype = NFT_DATA_VALUE;
4423 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
4424 ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4425 if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
4426 return -EINVAL;
4427 }
4428
c50b960c 4429 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4430 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4431 return -EINVAL;
4432
4433 flags = 0;
4434 if (nla[NFTA_SET_FLAGS] != NULL) {
4435 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4436 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4437 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4438 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4439 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4440 return -EOPNOTSUPP;
8aeff920 4441 /* Only one of these operations is supported */
acab7131
FW		 4442 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4443 (NFT_SET_MAP | NFT_SET_OBJECT))
4444 return -EOPNOTSUPP;
4445 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4446 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4447 return -EOPNOTSUPP;
20a69341
PM		 4448 }
4449
4450 dtype = 0;
20a69341
PM		 4451 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4452 if (!(flags & NFT_SET_MAP))
4453 return -EINVAL;
4454
4455 dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4456 if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4457 dtype != NFT_DATA_VERDICT)
4458 return -EINVAL;
4459
4460 if (dtype != NFT_DATA_VERDICT) {
4461 if (nla[NFTA_SET_DATA_LEN] == NULL)
4462 return -EINVAL;
c50b960c 4463 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4464 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4465 return -EINVAL;
4466 } else
7d740264 4467 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 4468 } else if (flags & NFT_SET_MAP)
4469 return -EINVAL;
4470
8aeff920
PNA		 4471 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4472 if (!(flags & NFT_SET_OBJECT))
4473 return -EINVAL;
4474
4475 objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4476 if (objtype == NFT_OBJECT_UNSPEC ||
4477 objtype > NFT_OBJECT_MAX)
d9583cdf 4478 return -EOPNOTSUPP;
8aeff920
PNA		 4479 } else if (flags & NFT_SET_OBJECT)
4480 return -EINVAL;
4481 else
4482 objtype = NFT_OBJECT_UNSPEC;
4483
761da293
PM		 4484 timeout = 0;
4485 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4486 if (!(flags & NFT_SET_TIMEOUT))
4487 return -EINVAL;
8e1102d5
FW		 4488
4489 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &timeout);
4490 if (err)
4491 return err;
761da293
PM		 4492 }
4493 gc_int = 0;
4494 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4495 if (!(flags & NFT_SET_TIMEOUT))
4496 return -EINVAL;
4497 gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
4498 }
4499
c50b960c
PM		 4500 policy = NFT_SET_POL_PERFORMANCE;
4501 if (nla[NFTA_SET_POLICY] != NULL)
4502 policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
4503
4504 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 4505 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 4506 if (err < 0)
4507 return err;
1b6345d4
PNA		 4508
4509 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4510 return -EINVAL;
4511 } else if (flags & NFT_SET_CONCAT) {
4512 return -EINVAL;
c50b960c
PM		 4513 }
4514
48b0ae04 4515 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 4516 desc.expr = true;
4517
6001a930
PNA		 4518 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4519 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4520 if (IS_ERR(table)) {
4521 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 4522 return PTR_ERR(table);
36dd1bcc 4523 }
20a69341 4524
7dab8ee3 4525 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4526
cac20fcd 4527 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 4528 if (IS_ERR(set)) {
36dd1bcc
PNA		 4529 if (PTR_ERR(set) != -ENOENT) {
4530 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4531 return PTR_ERR(set);
36dd1bcc 4532 }
1a28ad74 4533 } else {
7dab8ee3 4534 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 4535 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4536 return -EEXIST;
36dd1bcc 4537 }
7dab8ee3 4538 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 4539 return -EOPNOTSUPP;
36dd1bcc 4540
20a69341
PM		 4541 return 0;
4542 }
4543
7dab8ee3 4544 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 4545 return -ENOENT;
4546
2b664957 4547 ops = nft_select_set_ops(&ctx, nla, &desc, policy);
20a69341
PM		 4548 if (IS_ERR(ops))
4549 return PTR_ERR(ops);
4550
e6d8ecac
CFG		 4551 udlen = 0;
4552 if (nla[NFTA_SET_USERDATA])
4553 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4554
20a69341
PM		 4555 size = 0;
4556 if (ops->privsize != NULL)
347b408d 4557 size = ops->privsize(nla, &desc);
6c8774a9 4558 alloc_size = sizeof(*set) + size + udlen;
45928afe 4559 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 4560 return -ENOMEM;
33758c89 4561 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
24d19826
FW		 4562 if (!set)
4563 return -ENOMEM;
20a69341 4564
33758c89 4565 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 4566 if (!name) {
4567 err = -ENOMEM;
65038428 4568 goto err_set_name;
38745490
PS		 4569 }
4570
20a69341 4571 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 4572 kfree(name);
20a69341 4573 if (err < 0)
ad9f151e
PNA		 4574 goto err_set_name;
4575
4576 udata = NULL;
4577 if (udlen) {
4578 udata = set->data + size;
4579 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
4580 }
4581
4582 INIT_LIST_HEAD(&set->bindings);
4583 INIT_LIST_HEAD(&set->catchall_list);
4584 set->table = table;
4585 write_pnet(&set->net, net);
4586 set->ops = ops;
4587 set->ktype = ktype;
4588 set->klen = desc.klen;
4589 set->dtype = dtype;
4590 set->objtype = objtype;
4591 set->dlen = desc.dlen;
4592 set->flags = flags;
4593 set->size = desc.size;
4594 set->policy = policy;
4595 set->udlen = udlen;
4596 set->udata = udata;
4597 set->timeout = timeout;
4598 set->gc_int = gc_int;
4599
4600 set->field_count = desc.field_count;
4601 for (i = 0; i < desc.field_count; i++)
4602 set->field_len[i] = desc.field_len[i];
4603
4604 err = ops->init(set, &desc, nla);
4605 if (err < 0)
4606 goto err_set_init;
65038428
PNA		 4607
4608 if (nla[NFTA_SET_EXPR]) {
4609 expr = nft_set_elem_expr_alloc(&ctx, set, nla[NFTA_SET_EXPR]);
4610 if (IS_ERR(expr)) {
4611 err = PTR_ERR(expr);
ad9f151e 4612 goto err_set_expr_alloc;
65038428 4613 }
8cfd9b0f
PNA		 4614 set->exprs[0] = expr;
4615 set->num_exprs++;
48b0ae04
PNA		 4616 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4617 struct nft_expr *expr;
4618 struct nlattr *tmp;
4619 int left;
4620
b4e70d8d
PNA		 4621 if (!(flags & NFT_SET_EXPR)) {
4622 err = -EINVAL;
ad9f151e 4623 goto err_set_expr_alloc;
b4e70d8d 4624 }
48b0ae04
PNA		 4625 i = 0;
4626 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4627 if (i == NFT_SET_EXPR_MAX) {
4628 err = -E2BIG;
ad9f151e 4629 goto err_set_expr_alloc;
48b0ae04
PNA		 4630 }
4631 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4632 err = -EINVAL;
ad9f151e 4633 goto err_set_expr_alloc;
48b0ae04
PNA		 4634 }
4635 expr = nft_set_elem_expr_alloc(&ctx, set, tmp);
4636 if (IS_ERR(expr)) {
4637 err = PTR_ERR(expr);
ad9f151e 4638 goto err_set_expr_alloc;
48b0ae04
PNA		 4639 }
4640 set->exprs[i++] = expr;
4641 set->num_exprs++;
4642 }
65038428 4643 }
20a69341 4644
3ecbfd65 4645 set->handle = nf_tables_alloc_handle(table);
20a69341 4646
958bee14 4647 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 4648 if (err < 0)
ad9f151e 4649 goto err_set_expr_alloc;
20a69341 4650
e688a7f8 4651 list_add_tail_rcu(&set->list, &table->sets);
4fefee57 4652 table->use++;
20a69341
PM		 4653 return 0;
4654
ad9f151e 4655err_set_expr_alloc:
8cfd9b0f
PNA		 4656 for (i = 0; i < set->num_exprs; i++)
4657 nft_expr_destroy(&ctx, set->exprs[i]);
ad9f151e
PNA		 4658
4659 ops->destroy(set);
4660err_set_init:
2f6adf48 4661 kfree(set->name);
65038428 4662err_set_name:
1ff75a3e 4663 kvfree(set);
20a69341
PM		 4664 return err;
4665}
4666
aaa31047
PNA		 4667struct nft_set_elem_catchall {
4668 struct list_head list;
4669 struct rcu_head rcu;
4670 void *elem;
4671};
4672
4673static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
4674 struct nft_set *set)
4675{
0f7d9b31 4676 struct nft_set_elem_catchall *next, *catchall;
aaa31047 4677
0f7d9b31 4678 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047
PNA		 4679 list_del_rcu(&catchall->list);
4680 nft_set_elem_destroy(set, catchall->elem, true);
ae089831 4681 kfree_rcu(catchall, rcu);
aaa31047
PNA		 4682 }
4683}
4684
0c2a85ed 4685static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 4686{
8cfd9b0f
PNA		 4687 int i;
4688
273fe3f1
PNA		 4689 if (WARN_ON(set->use > 0))
4690 return;
4691
8cfd9b0f
PNA		 4692 for (i = 0; i < set->num_exprs; i++)
4693 nft_expr_destroy(ctx, set->exprs[i]);
65038428 4694
20a69341 4695 set->ops->destroy(set);
aaa31047 4696 nft_set_catchall_destroy(ctx, set);
38745490 4697 kfree(set->name);
1ff75a3e 4698 kvfree(set);
20a69341
PM		 4699}
4700
7dab8ee3
PNA		 4701static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
4702 const struct nlattr * const nla[])
20a69341 4703{
7dab8ee3
PNA		 4704 struct netlink_ext_ack *extack = info->extack;
4705 u8 genmask = nft_genmask_next(info->net);
67086651 4706 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 4707 struct net *net = info->net;
36dd1bcc 4708 const struct nlattr *attr;
67086651 4709 struct nft_table *table;
20a69341
PM		 4710 struct nft_set *set;
4711 struct nft_ctx ctx;
20a69341 4712
ef4b65e5 4713 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 4714 return -EAFNOSUPPORT;
20a69341 4715
67086651
PNA		 4716 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4717 genmask, NETLINK_CB(skb).portid);
4718 if (IS_ERR(table)) {
4719 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4720 return PTR_ERR(table);
4721 }
20a69341 4722
36dd1bcc
PNA		 4723 if (nla[NFTA_SET_HANDLE]) {
4724 attr = nla[NFTA_SET_HANDLE];
67086651 4725 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 4726 } else {
4727 attr = nla[NFTA_SET_NAME];
67086651 4728 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 4729 }
a8278400 4730
36dd1bcc
PNA		 4731 if (IS_ERR(set)) {
4732 NL_SET_BAD_ATTR(extack, attr);
4733 return PTR_ERR(set);
4734 }
273fe3f1 4735 if (set->use ||
7dab8ee3
PNA		 4736 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
4737 atomic_read(&set->nelems) > 0)) {
36dd1bcc 4738 NL_SET_BAD_ATTR(extack, attr);
20a69341 4739 return -EBUSY;
36dd1bcc 4740 }
20a69341 4741
67086651
PNA		 4742 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4743
ee01d542 4744 return nft_delset(&ctx, set);
20a69341
PM		 4745}
4746
345023b0
PNA		 4747static int nft_validate_register_store(const struct nft_ctx *ctx,
4748 enum nft_registers reg,
4749 const struct nft_data *data,
4750 enum nft_data_types type,
4751 unsigned int len);
4752
97c976d6
PNA		 4753static int nft_setelem_data_validate(const struct nft_ctx *ctx,
4754 struct nft_set *set,
4755 struct nft_set_elem *elem)
20a69341 4756{
fe2811eb 4757 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 4758 enum nft_registers dreg;
4759
4760 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 4761 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
4762 set->dtype == NFT_DATA_VERDICT ?
4763 NFT_DATA_VERDICT : NFT_DATA_VALUE,
4764 set->dlen);
20a69341
PM		 4765}
4766
97c976d6
PNA		 4767static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
4768 struct nft_set *set,
4769 const struct nft_set_iter *iter,
4770 struct nft_set_elem *elem)
4771{
4772 return nft_setelem_data_validate(ctx, set, elem);
4773}
4774
aaa31047
PNA		 4775static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
4776 struct nft_set *set)
4777{
4778 u8 genmask = nft_genmask_next(ctx->net);
4779 struct nft_set_elem_catchall *catchall;
4780 struct nft_set_elem elem;
4781 struct nft_set_ext *ext;
4782 int ret = 0;
4783
4784 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
4785 ext = nft_set_elem_ext(set, catchall->elem);
4786 if (!nft_set_elem_active(ext, genmask))
4787 continue;
4788
4789 elem.priv = catchall->elem;
4790 ret = nft_setelem_data_validate(ctx, set, &elem);
4791 if (ret < 0)
4792 break;
4793 }
4794
4795 return ret;
4796}
4797
20a69341
PM		 4798int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
4799 struct nft_set_binding *binding)
4800{
4801 struct nft_set_binding *i;
4802 struct nft_set_iter iter;
4803
273fe3f1
PNA		 4804 if (set->use == UINT_MAX)
4805 return -EOVERFLOW;
4806
408070d6 4807 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 4808 return -EBUSY;
4809
11113e19 4810 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 4811 /* If the set is already bound to the same chain all
4812 * jumps are already validated for that chain.
4813 */
4814 list_for_each_entry(i, &set->bindings, list) {
a4684402 4815 if (i->flags & NFT_SET_MAP &&
11113e19 4816 i->chain == binding->chain)
20a69341
PM		 4817 goto bind;
4818 }
4819
8588ac09 4820 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 4821 iter.skip = 0;
4822 iter.count = 0;
4823 iter.err = 0;
4824 iter.fn = nf_tables_bind_check_setelem;
4825
4826 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 4827 if (!iter.err)
4828 iter.err = nft_set_catchall_bind_check(ctx, set);
4829
a02f4248 4830 if (iter.err < 0)
20a69341 4831 return iter.err;
20a69341
PM		 4832 }
4833bind:
4834 binding->chain = ctx->chain;
e688a7f8 4835 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585 4836 nft_set_trans_bind(ctx, set);
273fe3f1 4837 set->use++;
f6ac8585 4838
20a69341
PM		 4839 return 0;
4840}
63aea290 4841EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 4842
3b0a081d
FW		 4843static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
4844 struct nft_set_binding *binding, bool event)
20a69341 4845{
e688a7f8 4846 list_del_rcu(&binding->list);
20a69341 4847
f6ac8585 4848 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 4849 list_del_rcu(&set->list);
f6ac8585
PNA		 4850 if (event)
4851 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
4852 GFP_KERNEL);
4853 }
20a69341
PM		 4854}
4855
273fe3f1
PNA		 4856void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
4857 struct nft_set_binding *binding,
4858 enum nft_trans_phase phase)
4859{
4860 switch (phase) {
4861 case NFT_TRANS_PREPARE:
4862 set->use--;
4863 return;
4864 case NFT_TRANS_ABORT:
4865 case NFT_TRANS_RELEASE:
4866 set->use--;
954d8297 4867 fallthrough;
273fe3f1
PNA		 4868 default:
4869 nf_tables_unbind_set(ctx, set, binding,
4870 phase == NFT_TRANS_COMMIT);
4871 }
4872}
4873EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
4874
cd5125d8
FW		 4875void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
4876{
f6ac8585 4877 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 4878 nft_set_destroy(ctx, set);
cd5125d8
FW		 4879}
4880EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
4881
3ac4c07a
PM		 4882const struct nft_set_ext_type nft_set_ext_types[] = {
4883 [NFT_SET_EXT_KEY] = {
7d740264 4884 .align = __alignof__(u32),
3ac4c07a
PM		 4885 },
4886 [NFT_SET_EXT_DATA] = {
7d740264 4887 .align = __alignof__(u32),
3ac4c07a 4888 },
563125a7
PNA		 4889 [NFT_SET_EXT_EXPRESSIONS] = {
4890 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 4891 },
8aeff920
PNA		 4892 [NFT_SET_EXT_OBJREF] = {
4893 .len = sizeof(struct nft_object *),
4894 .align = __alignof__(struct nft_object *),
4895 },
3ac4c07a
PM		 4896 [NFT_SET_EXT_FLAGS] = {
4897 .len = sizeof(u8),
4898 .align = __alignof__(u8),
4899 },
c3e1b005
PM		 4900 [NFT_SET_EXT_TIMEOUT] = {
4901 .len = sizeof(u64),
4902 .align = __alignof__(u64),
4903 },
4904 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 4905 .len = sizeof(u64),
4906 .align = __alignof__(u64),
c3e1b005 4907 },
68e942e8
PM		 4908 [NFT_SET_EXT_USERDATA] = {
4909 .len = sizeof(struct nft_userdata),
4910 .align = __alignof__(struct nft_userdata),
4911 },
7b225d0b
PNA		 4912 [NFT_SET_EXT_KEY_END] = {
4913 .align = __alignof__(u32),
4914 },
3ac4c07a 4915};
3ac4c07a 4916
20a69341
PM		 4917/*
4918 * Set elements
4919 */
4920
4921static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
4922 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
4923 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
4924 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 4925 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 4926 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 4927 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
4928 .len = NFT_USERDATA_MAXLEN },
467697d2 4929 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 4930 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
4931 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 4932 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
48b0ae04 4933 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
20a69341
PM		 4934};
4935
4936static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 4937 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
4938 .len = NFT_TABLE_MAXNAMELEN - 1 },
4939 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
4940 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341 4941 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
958bee14 4942 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 4943};
4944
563125a7
PNA		 4945static int nft_set_elem_expr_dump(struct sk_buff *skb,
4946 const struct nft_set *set,
4947 const struct nft_set_ext *ext)
4948{
4949 struct nft_set_elem_expr *elem_expr;
4950 u32 size, num_exprs = 0;
4951 struct nft_expr *expr;
48b0ae04 4952 struct nlattr *nest;
563125a7
PNA		 4953
4954 elem_expr = nft_set_ext_expr(ext);
4955 nft_setelem_expr_foreach(expr, elem_expr, size)
4956 num_exprs++;
4957
4958 if (num_exprs == 1) {
4959 expr = nft_setelem_expr_at(elem_expr, 0);
8daa8fde 4960 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, false) < 0)
563125a7
PNA		 4961 return -1;
4962
4963 return 0;
48b0ae04
PNA		 4964 } else if (num_exprs > 1) {
4965 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
4966 if (nest == NULL)
4967 goto nla_put_failure;
563125a7 4968
48b0ae04
PNA		 4969 nft_setelem_expr_foreach(expr, elem_expr, size) {
4970 expr = nft_setelem_expr_at(elem_expr, size);
8daa8fde 4971 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, false) < 0)
48b0ae04
PNA		 4972 goto nla_put_failure;
4973 }
4974 nla_nest_end(skb, nest);
4975 }
563125a7 4976 return 0;
48b0ae04
PNA		 4977
4978nla_put_failure:
4979 return -1;
563125a7
PNA		 4980}
4981
20a69341
PM		 4982static int nf_tables_fill_setelem(struct sk_buff *skb,
4983 const struct nft_set *set,
4984 const struct nft_set_elem *elem)
4985{
fe2811eb 4986 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 4987 unsigned char *b = skb_tail_pointer(skb);
4988 struct nlattr *nest;
4989
ae0be8de 4990 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 4991 if (nest == NULL)
4992 goto nla_put_failure;
4993
aaa31047
PNA		 4994 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
4995 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 4996 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 4997 goto nla_put_failure;
4998
7b225d0b
PNA		 4999 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5000 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5001 NFT_DATA_VALUE, set->klen) < 0)
5002 goto nla_put_failure;
5003
fe2811eb
PM		 5004 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5005 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 5006 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5007 set->dlen) < 0)
5008 goto nla_put_failure;
5009
563125a7
PNA		 5010 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
5011 nft_set_elem_expr_dump(skb, set, ext))
f25ad2e9
PM		 5012 goto nla_put_failure;
5013
8aeff920
PNA		 5014 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5015 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 5016 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 5017 goto nla_put_failure;
5018
fe2811eb
PM		 5019 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5020 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5021 htonl(*nft_set_ext_flags(ext))))
5022 goto nla_put_failure;
20a69341 5023
c3e1b005
PM		 5024 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
5025 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
8e1102d5 5026 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
b46f6ded 5027 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5028 goto nla_put_failure;
5029
5030 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 5031 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 5032
5033 expires = *nft_set_ext_expiration(ext);
8e1102d5 5034 if (time_before64(now, expires))
c3e1b005
PM		 5035 expires -= now;
5036 else
5037 expires = 0;
5038
5039 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 5040 nf_jiffies64_to_msecs(expires),
b46f6ded 5041 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 5042 goto nla_put_failure;
5043 }
5044
68e942e8
PM		 5045 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5046 struct nft_userdata *udata;
5047
5048 udata = nft_set_ext_userdata(ext);
5049 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5050 udata->len + 1, udata->data))
5051 goto nla_put_failure;
5052 }
5053
20a69341
PM		 5054 nla_nest_end(skb, nest);
5055 return 0;
5056
5057nla_put_failure:
5058 nlmsg_trim(skb, b);
5059 return -EMSGSIZE;
5060}
5061
5062struct nft_set_dump_args {
5063 const struct netlink_callback *cb;
5064 struct nft_set_iter iter;
5065 struct sk_buff *skb;
5066};
5067
5068static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5069 struct nft_set *set,
20a69341 5070 const struct nft_set_iter *iter,
de70185d 5071 struct nft_set_elem *elem)
20a69341
PM		 5072{
5073 struct nft_set_dump_args *args;
5074
5075 args = container_of(iter, struct nft_set_dump_args, iter);
5076 return nf_tables_fill_setelem(args->skb, set, elem);
5077}
5078
fa803605
LZ		 5079struct nft_set_dump_ctx {
5080 const struct nft_set *set;
5081 struct nft_ctx ctx;
5082};
5083
aaa31047
PNA		 5084static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5085 const struct nft_set *set)
5086{
5087 struct nft_set_elem_catchall *catchall;
5088 u8 genmask = nft_genmask_cur(net);
5089 struct nft_set_elem elem;
5090 struct nft_set_ext *ext;
5091 int ret = 0;
5092
5093 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5094 ext = nft_set_elem_ext(set, catchall->elem);
5095 if (!nft_set_elem_active(ext, genmask) ||
5096 nft_set_elem_expired(ext))
5097 continue;
5098
5099 elem.priv = catchall->elem;
5100 ret = nf_tables_fill_setelem(skb, set, &elem);
5101 break;
5102 }
5103
5104 return ret;
5105}
5106
20a69341
PM		 5107static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5108{
fa803605 5109 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5110 struct net *net = sock_net(skb->sk);
0854db2a 5111 struct nftables_pernet *nft_net;
fa803605 5112 struct nft_table *table;
de70185d 5113 struct nft_set *set;
20a69341 5114 struct nft_set_dump_args args;
fa803605 5115 bool set_found = false;
20a69341
PM		 5116 struct nlmsghdr *nlh;
5117 struct nlattr *nest;
5118 u32 portid, seq;
fa803605 5119 int event;
20a69341 5120
fa803605 5121 rcu_read_lock();
d59d2f82 5122 nft_net = nft_pernet(net);
34002783
PNA		 5123 cb->seq = READ_ONCE(nft_net->base_seq);
5124
0854db2a 5125 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5126 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5127 dump_ctx->ctx.family != table->family)
fa803605 5128 continue;
20a69341 5129
36596dad
PNA		 5130 if (table != dump_ctx->ctx.table)
5131 continue;
20a69341 5132
36596dad
PNA		 5133 list_for_each_entry_rcu(set, &table->sets, list) {
5134 if (set == dump_ctx->set) {
5135 set_found = true;
5136 break;
fa803605 5137 }
fa803605
LZ		 5138 }
5139 break;
5140 }
5141
5142 if (!set_found) {
5143 rcu_read_unlock();
5144 return -ENOENT;
5145 }
20a69341 5146
dedb67c4 5147 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5148 portid = NETLINK_CB(cb->skb).portid;
5149 seq = cb->nlh->nlmsg_seq;
5150
19c28b13
PNA		 5151 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5152 table->family, NFNETLINK_V0, nft_base_seq(net));
5153 if (!nlh)
20a69341
PM		 5154 goto nla_put_failure;
5155
fa803605 5156 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5157 goto nla_put_failure;
5158 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5159 goto nla_put_failure;
5160
ae0be8de 5161 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5162 if (nest == NULL)
5163 goto nla_put_failure;
5164
8588ac09
PNA		 5165 args.cb = cb;
5166 args.skb = skb;
fa803605 5167 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5168 args.iter.skip = cb->args[0];
5169 args.iter.count = 0;
5170 args.iter.err = 0;
5171 args.iter.fn = nf_tables_dump_setelem;
fa803605 5172 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5173
5174 if (!args.iter.err && args.iter.count == cb->args[0])
5175 args.iter.err = nft_set_catchall_dump(net, skb, set);
fa803605 5176 rcu_read_unlock();
20a69341
PM		 5177
5178 nla_nest_end(skb, nest);
5179 nlmsg_end(skb, nlh);
5180
5181 if (args.iter.err && args.iter.err != -EMSGSIZE)
5182 return args.iter.err;
5183 if (args.iter.count == cb->args[0])
5184 return 0;
5185
5186 cb->args[0] = args.iter.count;
5187 return skb->len;
5188
5189nla_put_failure:
fa803605 5190 rcu_read_unlock();
20a69341
PM		 5191 return -ENOSPC;
5192}
5193
90fd131a
FW		 5194static int nf_tables_dump_set_start(struct netlink_callback *cb)
5195{
5196 struct nft_set_dump_ctx *dump_ctx = cb->data;
5197
5198 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5199
5200 return cb->data ? 0 : -ENOMEM;
5201}
5202
fa803605
LZ		 5203static int nf_tables_dump_set_done(struct netlink_callback *cb)
5204{
5205 kfree(cb->data);
5206 return 0;
5207}
5208
d60ce62f
AB		 5209static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5210 const struct nft_ctx *ctx, u32 seq,
5211 u32 portid, int event, u16 flags,
5212 const struct nft_set *set,
5213 const struct nft_set_elem *elem)
5214{
d60ce62f
AB		 5215 struct nlmsghdr *nlh;
5216 struct nlattr *nest;
5217 int err;
5218
dedb67c4 5219 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5220 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5221 NFNETLINK_V0, nft_base_seq(ctx->net));
5222 if (!nlh)
d60ce62f
AB		 5223 goto nla_put_failure;
5224
d60ce62f
AB		 5225 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5226 goto nla_put_failure;
5227 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5228 goto nla_put_failure;
5229
ae0be8de 5230 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5231 if (nest == NULL)
5232 goto nla_put_failure;
5233
5234 err = nf_tables_fill_setelem(skb, set, elem);
5235 if (err < 0)
5236 goto nla_put_failure;
5237
5238 nla_nest_end(skb, nest);
5239
053c095a
JB		 5240 nlmsg_end(skb, nlh);
5241 return 0;
d60ce62f
AB		 5242
5243nla_put_failure:
5244 nlmsg_trim(skb, nlh);
5245 return -1;
5246}
5247
ba0e4d99
PNA		 5248static int nft_setelem_parse_flags(const struct nft_set *set,
5249 const struct nlattr *attr, u32 *flags)
5250{
5251 if (attr == NULL)
5252 return 0;
5253
5254 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5255 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5256 return -EOPNOTSUPP;
ba0e4d99
PNA		 5257 if (!(set->flags & NFT_SET_INTERVAL) &&
5258 *flags & NFT_SET_ELEM_INTERVAL_END)
5259 return -EINVAL;
fc0ae524
PNA		 5260 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5261 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5262 return -EINVAL;
ba0e4d99
PNA		 5263
5264 return 0;
5265}
5266
20a1452c
PNA		 5267static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5268 struct nft_data *key, struct nlattr *attr)
5269{
341b6941
PNA		 5270 struct nft_data_desc desc = {
5271 .type = NFT_DATA_VALUE,
5272 .size = NFT_DATA_VALUE_MAXLEN,
5273 .len = set->klen,
5274 };
20a1452c 5275
341b6941 5276 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5277}
5278
fdb9c405
PNA		 5279static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5280 struct nft_data_desc *desc,
5281 struct nft_data *data,
5282 struct nlattr *attr)
5283{
7e6bc1f6 5284 u32 dtype;
fdb9c405 5285
7e6bc1f6
PNA		 5286 if (set->dtype == NFT_DATA_VERDICT)
5287 dtype = NFT_DATA_VERDICT;
5288 else
5289 dtype = NFT_DATA_VALUE;
5290
341b6941
PNA		 5291 desc->type = dtype;
5292 desc->size = NFT_DATA_VALUE_MAXLEN;
5293 desc->len = set->dlen;
f323ef3a 5294 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5295
341b6941 5296 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5297}
5298
aaa31047
PNA		 5299static void *nft_setelem_catchall_get(const struct net *net,
5300 const struct nft_set *set)
5301{
5302 struct nft_set_elem_catchall *catchall;
5303 u8 genmask = nft_genmask_cur(net);
5304 struct nft_set_ext *ext;
5305 void *priv = NULL;
5306
5307 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5308 ext = nft_set_elem_ext(set, catchall->elem);
5309 if (!nft_set_elem_active(ext, genmask) ||
5310 nft_set_elem_expired(ext))
5311 continue;
5312
5313 priv = catchall->elem;
5314 break;
5315 }
5316
5317 return priv;
5318}
5319
5320static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5321 struct nft_set_elem *elem, u32 flags)
5322{
5323 void *priv;
5324
5325 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5326 priv = set->ops->get(ctx->net, set, elem, flags);
5327 if (IS_ERR(priv))
5328 return PTR_ERR(priv);
5329 } else {
5330 priv = nft_setelem_catchall_get(ctx->net, set);
5331 if (!priv)
5332 return -ENOENT;
5333 }
5334 elem->priv = priv;
5335
5336 return 0;
5337}
5338
ba0e4d99
PNA		 5339static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5340 const struct nlattr *attr)
5341{
5342 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5343 struct nft_set_elem elem;
5344 struct sk_buff *skb;
5345 uint32_t flags = 0;
ba0e4d99
PNA		 5346 int err;
5347
8cb08174
JB		 5348 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5349 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5350 if (err < 0)
5351 return err;
5352
ba0e4d99
PNA		 5353 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5354 if (err < 0)
5355 return err;
5356
aaa31047
PNA		 5357 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5358 return -EINVAL;
5359
5360 if (nla[NFTA_SET_ELEM_KEY]) {
5361 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5362 nla[NFTA_SET_ELEM_KEY]);
5363 if (err < 0)
5364 return err;
5365 }
ba0e4d99 5366
7b225d0b
PNA		 5367 if (nla[NFTA_SET_ELEM_KEY_END]) {
5368 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5369 nla[NFTA_SET_ELEM_KEY_END]);
5370 if (err < 0)
5371 return err;
5372 }
5373
aaa31047
PNA		 5374 err = nft_setelem_get(ctx, set, &elem, flags);
5375 if (err < 0)
5376 return err;
ba0e4d99
PNA		 5377
5378 err = -ENOMEM;
d9adf22a 5379 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 5380 if (skb == NULL)
ee921183 5381 return err;
ba0e4d99
PNA		 5382
5383 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5384 NFT_MSG_NEWSETELEM, 0, set, &elem);
5385 if (err < 0)
ee921183 5386 goto err_fill_setelem;
ba0e4d99 5387
ee921183 5388 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 5389
ee921183 5390err_fill_setelem:
ba0e4d99 5391 kfree_skb(skb);
ee921183 5392 return err;
ba0e4d99
PNA		 5393}
5394
d9adf22a 5395/* called with rcu_read_lock held */
797d4980
PNA		 5396static int nf_tables_getsetelem(struct sk_buff *skb,
5397 const struct nfnl_info *info,
5398 const struct nlattr * const nla[])
ba0e4d99 5399{
797d4980
PNA		 5400 struct netlink_ext_ack *extack = info->extack;
5401 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 5402 u8 family = info->nfmsg->nfgen_family;
797d4980 5403 struct net *net = info->net;
e2b750d7 5404 struct nft_table *table;
ba0e4d99
PNA		 5405 struct nft_set *set;
5406 struct nlattr *attr;
5407 struct nft_ctx ctx;
5408 int rem, err = 0;
5409
e2b750d7
PNA		 5410 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
5411 genmask, NETLINK_CB(skb).portid);
5412 if (IS_ERR(table)) {
5413 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5414 return PTR_ERR(table);
5415 }
ba0e4d99 5416
e2b750d7 5417 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
ba0e4d99
PNA		 5418 if (IS_ERR(set))
5419 return PTR_ERR(set);
5420
e2b750d7
PNA		 5421 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5422
797d4980 5423 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 5424 struct netlink_dump_control c = {
90fd131a 5425 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 5426 .dump = nf_tables_dump_set,
5427 .done = nf_tables_dump_set_done,
d9adf22a 5428 .module = THIS_MODULE,
ba0e4d99 5429 };
90fd131a
FW		 5430 struct nft_set_dump_ctx dump_ctx = {
5431 .set = set,
5432 .ctx = ctx,
5433 };
ba0e4d99 5434
90fd131a 5435 c.data = &dump_ctx;
797d4980 5436 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 5437 }
5438
5439 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5440 return -EINVAL;
5441
5442 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5443 err = nft_get_set_elem(&ctx, set, attr);
b53c1166
PNA		 5444 if (err < 0) {
5445 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 5446 break;
b53c1166 5447 }
ba0e4d99
PNA		 5448 }
5449
5450 return err;
5451}
5452
25e94a99
PNA		 5453static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5454 const struct nft_set *set,
5455 const struct nft_set_elem *elem,
6fb721cf 5456 int event)
d60ce62f 5457{
0854db2a 5458 struct nftables_pernet *nft_net;
128ad332
PNA		 5459 struct net *net = ctx->net;
5460 u32 portid = ctx->portid;
d60ce62f 5461 struct sk_buff *skb;
6fb721cf 5462 u16 flags = 0;
d60ce62f
AB		 5463 int err;
5464
128ad332 5465 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 5466 return;
d60ce62f 5467
d60ce62f
AB		 5468 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5469 if (skb == NULL)
5470 goto err;
5471
6fb721cf
PNA		 5472 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5473 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5474
d60ce62f
AB		 5475 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5476 set, elem);
5477 if (err < 0) {
5478 kfree_skb(skb);
5479 goto err;
5480 }
5481
d59d2f82 5482 nft_net = nft_pernet(net);
0854db2a 5483 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 5484 return;
d60ce62f 5485err:
25e94a99 5486 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 5487}
5488
60319eb1
PNA		 5489static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5490 int msg_type,
5491 struct nft_set *set)
5492{
5493 struct nft_trans *trans;
5494
5495 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5496 if (trans == NULL)
5497 return NULL;
5498
5499 nft_trans_elem_set(trans) = set;
5500 return trans;
5501}
5502
a7fc9368
PNA		 5503struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5504 const struct nft_set *set,
5505 const struct nlattr *attr)
5506{
5507 struct nft_expr *expr;
5508 int err;
5509
5510 expr = nft_expr_init(ctx, attr);
5511 if (IS_ERR(expr))
5512 return expr;
5513
5514 err = -EOPNOTSUPP;
a7fc9368
PNA		 5515 if (expr->ops->type->flags & NFT_EXPR_GC) {
5516 if (set->flags & NFT_SET_TIMEOUT)
5517 goto err_set_elem_expr;
5518 if (!set->ops->gc_init)
5519 goto err_set_elem_expr;
5520 set->ops->gc_init(set);
5521 }
5522
5523 return expr;
5524
5525err_set_elem_expr:
5526 nft_expr_destroy(ctx, expr);
5527 return ERR_PTR(err);
5528}
5529
34aae2c2
PNA		 5530static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
5531{
5532 len += nft_set_ext_types[id].len;
5533 if (len > tmpl->ext_len[id] ||
5534 len > U8_MAX)
5535 return -1;
5536
5537 return 0;
5538}
5539
5540static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
5541 void *to, const void *from, u32 len)
5542{
5543 if (nft_set_ext_check(tmpl, id, len) < 0)
5544 return -1;
5545
5546 memcpy(to, from, len);
5547
5548 return 0;
5549}
5550
22fe54d5
PM		 5551void *nft_set_elem_init(const struct nft_set *set,
5552 const struct nft_set_ext_tmpl *tmpl,
7b225d0b
PNA		 5553 const u32 *key, const u32 *key_end,
5554 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 5555{
5556 struct nft_set_ext *ext;
5557 void *elem;
5558
5559 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
5560 if (elem == NULL)
34aae2c2 5561 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 5562
5563 ext = nft_set_elem_ext(set, elem);
5564 nft_set_ext_init(ext, tmpl);
5565
34aae2c2
PNA		 5566 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5567 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
5568 nft_set_ext_key(ext), key, set->klen) < 0)
5569 goto err_ext_check;
5570
5571 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5572 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
5573 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
5574 goto err_ext_check;
5575
5576 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5577 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
5578 nft_set_ext_data(ext), data, set->dlen) < 0)
5579 goto err_ext_check;
5580
79ebb5bb
LGL		 5581 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5582 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
5583 if (expiration == 0)
5584 *nft_set_ext_expiration(ext) += timeout;
5585 }
c3e1b005
PM		 5586 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
5587 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 5588
5589 return elem;
34aae2c2
PNA		 5590
5591err_ext_check:
5592 kfree(elem);
5593
5594 return ERR_PTR(-EINVAL);
fe2811eb
PM		 5595}
5596
563125a7
PNA		 5597static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5598 struct nft_expr *expr)
475beb9c
PNA		 5599{
5600 if (expr->ops->destroy_clone) {
5601 expr->ops->destroy_clone(ctx, expr);
5602 module_put(expr->ops->type->owner);
5603 } else {
5604 nf_tables_expr_destroy(ctx, expr);
5605 }
5606}
5607
563125a7
PNA		 5608static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5609 struct nft_set_elem_expr *elem_expr)
5610{
5611 struct nft_expr *expr;
5612 u32 size;
5613
5614 nft_setelem_expr_foreach(expr, elem_expr, size)
5615 __nft_set_elem_expr_destroy(ctx, expr);
5616}
5617
61f9e292
LZ		 5618void nft_set_elem_destroy(const struct nft_set *set, void *elem,
5619 bool destroy_expr)
61edafbb
PM		 5620{
5621 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
3453c927
PNA		 5622 struct nft_ctx ctx = {
5623 .net = read_pnet(&set->net),
5624 .family = set->table->family,
5625 };
61edafbb 5626
59105446 5627 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 5628 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 5629 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 5630 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 5631 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
371ebcbb 5632
8aeff920
PNA		 5633 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
5634 (*nft_set_ext_obj(ext))->use--;
61edafbb
PM		 5635 kfree(elem);
5636}
5637EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
5638
f8bb7889
PNA		 5639/* Only called from commit path, nft_setelem_data_deactivate() already deals
5640 * with the refcounting from the preparation phase.
59105446 5641 */
3453c927
PNA		 5642static void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
5643 const struct nft_set *set, void *elem)
59105446
PNA		 5644{
5645 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5646
563125a7 5647 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 5648 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
5649
59105446
PNA		 5650 kfree(elem);
5651}
5652
fca05d4d
PNA		 5653int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
5654 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 5655{
5656 struct nft_expr *expr;
5657 int err, i, k;
5658
5659 for (i = 0; i < set->num_exprs; i++) {
42193ffd 5660 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 5661 if (!expr)
5662 goto err_expr;
5663
5664 err = nft_expr_clone(expr, set->exprs[i]);
5665 if (err < 0) {
c485c35f 5666 kfree(expr);
8cfd9b0f
PNA		 5667 goto err_expr;
5668 }
5669 expr_array[i] = expr;
5670 }
5671
5672 return 0;
5673
5674err_expr:
161b838e
CIK		 5675 for (k = i - 1; k >= 0; k--)
5676 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 5677
5678 return -ENOMEM;
5679}
5680
4d8f9065 5681static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 5682 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 5683 const struct nft_set_ext *ext,
5684 struct nft_expr *expr_array[],
5685 u32 num_exprs)
563125a7
PNA		 5686{
5687 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 5688 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 5689 struct nft_expr *expr;
5690 int i, err;
5691
34aae2c2
PNA		 5692 if (num_exprs == 0)
5693 return 0;
5694
5695 for (i = 0; i < num_exprs; i++)
5696 len += expr_array[i]->ops->size;
5697
5698 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
5699 return -EINVAL;
5700
4d8f9065
PNA		 5701 for (i = 0; i < num_exprs; i++) {
5702 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
5703 err = nft_expr_clone(expr, expr_array[i]);
5704 if (err < 0)
5705 goto err_elem_expr_setup;
5706
5707 elem_expr->size += expr_array[i]->ops->size;
5708 nft_expr_destroy(ctx, expr_array[i]);
5709 expr_array[i] = NULL;
5710 }
5711
5712 return 0;
5713
5714err_elem_expr_setup:
5715 for (; i < num_exprs; i++) {
5716 nft_expr_destroy(ctx, expr_array[i]);
5717 expr_array[i] = NULL;
5718 }
563125a7 5719
4d8f9065 5720 return -ENOMEM;
563125a7
PNA		 5721}
5722
aaa31047
PNA		 5723struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
5724 const struct nft_set *set)
5725{
5726 struct nft_set_elem_catchall *catchall;
5727 u8 genmask = nft_genmask_cur(net);
5728 struct nft_set_ext *ext;
5729
5730 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5731 ext = nft_set_elem_ext(set, catchall->elem);
5732 if (nft_set_elem_active(ext, genmask) &&
5733 !nft_set_elem_expired(ext))
5734 return ext;
5735 }
5736
5737 return NULL;
5738}
5739EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
5740
5741void *nft_set_catchall_gc(const struct nft_set *set)
5742{
5743 struct nft_set_elem_catchall *catchall, *next;
5744 struct nft_set_ext *ext;
5745 void *elem = NULL;
5746
5747 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5748 ext = nft_set_elem_ext(set, catchall->elem);
5749
5750 if (!nft_set_elem_expired(ext) ||
5751 nft_set_elem_mark_busy(ext))
5752 continue;
5753
5754 elem = catchall->elem;
5755 list_del_rcu(&catchall->list);
5756 kfree_rcu(catchall, rcu);
5757 break;
5758 }
5759
5760 return elem;
5761}
5762EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
5763
5764static int nft_setelem_catchall_insert(const struct net *net,
5765 struct nft_set *set,
5766 const struct nft_set_elem *elem,
5767 struct nft_set_ext **pext)
5768{
5769 struct nft_set_elem_catchall *catchall;
5770 u8 genmask = nft_genmask_next(net);
5771 struct nft_set_ext *ext;
5772
5773 list_for_each_entry(catchall, &set->catchall_list, list) {
5774 ext = nft_set_elem_ext(set, catchall->elem);
5775 if (nft_set_elem_active(ext, genmask)) {
5776 *pext = ext;
5777 return -EEXIST;
5778 }
5779 }
5780
5781 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
5782 if (!catchall)
5783 return -ENOMEM;
5784
5785 catchall->elem = elem->priv;
5786 list_add_tail_rcu(&catchall->list, &set->catchall_list);
5787
5788 return 0;
5789}
5790
5791static int nft_setelem_insert(const struct net *net,
5792 struct nft_set *set,
5793 const struct nft_set_elem *elem,
5794 struct nft_set_ext **ext, unsigned int flags)
5795{
5796 int ret;
5797
5798 if (flags & NFT_SET_ELEM_CATCHALL)
5799 ret = nft_setelem_catchall_insert(net, set, elem, ext);
5800 else
5801 ret = set->ops->insert(net, set, elem, ext);
5802
5803 return ret;
5804}
5805
5806static bool nft_setelem_is_catchall(const struct nft_set *set,
5807 const struct nft_set_elem *elem)
5808{
5809 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5810
5811 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5812 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
5813 return true;
5814
5815 return false;
5816}
5817
5818static void nft_setelem_activate(struct net *net, struct nft_set *set,
5819 struct nft_set_elem *elem)
5820{
5821 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5822
5823 if (nft_setelem_is_catchall(set, elem)) {
5824 nft_set_elem_change_active(net, set, ext);
5825 nft_set_elem_clear_busy(ext);
5826 } else {
5827 set->ops->activate(net, set, elem);
5828 }
5829}
5830
5831static int nft_setelem_catchall_deactivate(const struct net *net,
5832 struct nft_set *set,
5833 struct nft_set_elem *elem)
5834{
5835 struct nft_set_elem_catchall *catchall;
5836 struct nft_set_ext *ext;
5837
5838 list_for_each_entry(catchall, &set->catchall_list, list) {
5839 ext = nft_set_elem_ext(set, catchall->elem);
5840 if (!nft_is_active(net, ext) ||
5841 nft_set_elem_mark_busy(ext))
5842 continue;
5843
5844 kfree(elem->priv);
5845 elem->priv = catchall->elem;
5846 nft_set_elem_change_active(net, set, ext);
5847 return 0;
5848 }
5849
5850 return -ENOENT;
5851}
5852
5853static int __nft_setelem_deactivate(const struct net *net,
5854 struct nft_set *set,
5855 struct nft_set_elem *elem)
5856{
5857 void *priv;
5858
5859 priv = set->ops->deactivate(net, set, elem);
5860 if (!priv)
5861 return -ENOENT;
5862
5863 kfree(elem->priv);
5864 elem->priv = priv;
5865 set->ndeact++;
5866
5867 return 0;
5868}
5869
5870static int nft_setelem_deactivate(const struct net *net,
5871 struct nft_set *set,
5872 struct nft_set_elem *elem, u32 flags)
5873{
5874 int ret;
5875
5876 if (flags & NFT_SET_ELEM_CATCHALL)
5877 ret = nft_setelem_catchall_deactivate(net, set, elem);
5878 else
5879 ret = __nft_setelem_deactivate(net, set, elem);
5880
5881 return ret;
5882}
5883
5884static void nft_setelem_catchall_remove(const struct net *net,
5885 const struct nft_set *set,
5886 const struct nft_set_elem *elem)
5887{
5888 struct nft_set_elem_catchall *catchall, *next;
5889
5890 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5891 if (catchall->elem == elem->priv) {
5892 list_del_rcu(&catchall->list);
ae089831 5893 kfree_rcu(catchall, rcu);
aaa31047
PNA		 5894 break;
5895 }
5896 }
5897}
5898
5899static void nft_setelem_remove(const struct net *net,
5900 const struct nft_set *set,
5901 const struct nft_set_elem *elem)
5902{
5903 if (nft_setelem_is_catchall(set, elem))
5904 nft_setelem_catchall_remove(net, set, elem);
5905 else
5906 set->ops->remove(net, set, elem);
5907}
5908
88cccd90
PNA		 5909static bool nft_setelem_valid_key_end(const struct nft_set *set,
5910 struct nlattr **nla, u32 flags)
5911{
5912 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
5913 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
5914 if (flags & NFT_SET_ELEM_INTERVAL_END)
5915 return false;
96df8360
PNA		 5916
5917 if (nla[NFTA_SET_ELEM_KEY_END] &&
5918 flags & NFT_SET_ELEM_CATCHALL)
88cccd90
PNA		 5919 return false;
5920 } else {
5921 if (nla[NFTA_SET_ELEM_KEY_END])
5922 return false;
5923 }
5924
5925 return true;
5926}
5927
60319eb1 5928static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 5929 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 5930{
8cfd9b0f 5931 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 5932 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 5933 u8 genmask = nft_genmask_next(ctx->net);
664899e8 5934 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 5935 struct nft_set_ext_tmpl tmpl;
c016c7e4 5936 struct nft_set_ext *ext, *ext2;
20a69341
PM		 5937 struct nft_set_elem elem;
5938 struct nft_set_binding *binding;
8aeff920 5939 struct nft_object *obj = NULL;
68e942e8 5940 struct nft_userdata *udata;
20a1452c 5941 struct nft_data_desc desc;
20a69341 5942 enum nft_registers dreg;
60319eb1 5943 struct nft_trans *trans;
c3e1b005 5944 u64 timeout;
79ebb5bb 5945 u64 expiration;
8cfd9b0f 5946 int err, i;
68e942e8 5947 u8 ulen;
20a69341 5948
8cb08174
JB		 5949 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5950 nft_set_elem_policy, NULL);
20a69341
PM		 5951 if (err < 0)
5952 return err;
5953
fe2811eb
PM		 5954 nft_set_ext_prepare(&tmpl);
5955
0e9091d6
PNA		 5956 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5957 if (err < 0)
5958 return err;
aaa31047
PNA		 5959
5960 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5961 return -EINVAL;
5962
c39ba4de
PNA		 5963 if (flags != 0) {
5964 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
5965 if (err < 0)
5966 return err;
5967 }
20a69341
PM		 5968
5969 if (set->flags & NFT_SET_MAP) {
5970 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 5971 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 5972 return -EINVAL;
5973 } else {
5974 if (nla[NFTA_SET_ELEM_DATA] != NULL)
5975 return -EINVAL;
5976 }
5977
5a2f3dc3
PNA		 5978 if (set->flags & NFT_SET_OBJECT) {
5979 if (!nla[NFTA_SET_ELEM_OBJREF] &&
5980 !(flags & NFT_SET_ELEM_INTERVAL_END))
5981 return -EINVAL;
5982 } else {
5983 if (nla[NFTA_SET_ELEM_OBJREF])
5984 return -EINVAL;
5985 }
5986
88cccd90
PNA		 5987 if (!nft_setelem_valid_key_end(set, nla, flags))
5988 return -EINVAL;
5989
bffc124b
PNA		 5990 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
5991 (nla[NFTA_SET_ELEM_DATA] ||
5992 nla[NFTA_SET_ELEM_OBJREF] ||
5993 nla[NFTA_SET_ELEM_TIMEOUT] ||
5994 nla[NFTA_SET_ELEM_EXPIRATION] ||
5995 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 5996 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 5997 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 5998 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 5999 return -EINVAL;
6000
c3e1b005
PM		 6001 timeout = 0;
6002 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6003 if (!(set->flags & NFT_SET_TIMEOUT))
6004 return -EINVAL;
8e1102d5
FW		 6005 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6006 &timeout);
6007 if (err)
6008 return err;
33c7aba0
PNA		 6009 } else if (set->flags & NFT_SET_TIMEOUT &&
6010 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
c3e1b005
PM		 6011 timeout = set->timeout;
6012 }
6013
79ebb5bb
LGL		 6014 expiration = 0;
6015 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6016 if (!(set->flags & NFT_SET_TIMEOUT))
6017 return -EINVAL;
6018 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6019 &expiration);
6020 if (err)
6021 return err;
6022 }
6023
8cfd9b0f
PNA		 6024 if (nla[NFTA_SET_ELEM_EXPR]) {
6025 struct nft_expr *expr;
6026
664899e8 6027 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 6028 return -EOPNOTSUPP;
6029
40944452
PNA		 6030 expr = nft_set_elem_expr_alloc(ctx, set,
6031 nla[NFTA_SET_ELEM_EXPR]);
6032 if (IS_ERR(expr))
6033 return PTR_ERR(expr);
65038428 6034
8cfd9b0f 6035 expr_array[0] = expr;
664899e8 6036 num_exprs = 1;
65038428 6037
664899e8 6038 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 6039 err = -EOPNOTSUPP;
65038428 6040 goto err_set_elem_expr;
8cfd9b0f 6041 }
48b0ae04
PNA		 6042 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6043 struct nft_expr *expr;
6044 struct nlattr *tmp;
6045 int left;
65038428 6046
48b0ae04
PNA		 6047 i = 0;
6048 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 6049 if (i == NFT_SET_EXPR_MAX ||
6050 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 6051 err = -E2BIG;
6052 goto err_set_elem_expr;
6053 }
6054 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6055 err = -EINVAL;
6056 goto err_set_elem_expr;
6057 }
6058 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6059 if (IS_ERR(expr)) {
6060 err = PTR_ERR(expr);
6061 goto err_set_elem_expr;
6062 }
6063 expr_array[i] = expr;
664899e8 6064 num_exprs++;
48b0ae04 6065
664899e8 6066 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6067 err = -EOPNOTSUPP;
6068 goto err_set_elem_expr;
6069 }
6070 i++;
6071 }
664899e8 6072 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6073 err = -EOPNOTSUPP;
65038428 6074 goto err_set_elem_expr;
48b0ae04 6075 }
33c7aba0
PNA		 6076 } else if (set->num_exprs > 0 &&
6077 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
8cfd9b0f
PNA		 6078 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6079 if (err < 0)
6080 goto err_set_elem_expr_clone;
664899e8
PNA		 6081
6082 num_exprs = set->num_exprs;
40944452
PNA		 6083 }
6084
aaa31047
PNA		 6085 if (nla[NFTA_SET_ELEM_KEY]) {
6086 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6087 nla[NFTA_SET_ELEM_KEY]);
6088 if (err < 0)
6089 goto err_set_elem_expr;
20a69341 6090
c39ba4de
PNA		 6091 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6092 if (err < 0)
6093 goto err_parse_key;
aaa31047 6094 }
7b225d0b
PNA		 6095
6096 if (nla[NFTA_SET_ELEM_KEY_END]) {
6097 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6098 nla[NFTA_SET_ELEM_KEY_END]);
6099 if (err < 0)
6100 goto err_parse_key;
6101
c39ba4de
PNA		 6102 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6103 if (err < 0)
6104 goto err_parse_key_end;
7b225d0b
PNA		 6105 }
6106
c3e1b005 6107 if (timeout > 0) {
c39ba4de
PNA		 6108 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6109 if (err < 0)
6110 goto err_parse_key_end;
6111
6112 if (timeout != set->timeout) {
6113 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6114 if (err < 0)
6115 goto err_parse_key_end;
6116 }
c3e1b005 6117 }
fe2811eb 6118
664899e8
PNA		 6119 if (num_exprs) {
6120 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6121 size += expr_array[i]->ops->size;
6122
c39ba4de
PNA		 6123 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6124 sizeof(struct nft_set_elem_expr) + size);
6125 if (err < 0)
6126 goto err_parse_key_end;
563125a7 6127 }
40944452 6128
8aeff920 6129 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6130 obj = nft_obj_lookup(ctx->net, ctx->table,
6131 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6132 set->objtype, genmask);
8aeff920
PNA		 6133 if (IS_ERR(obj)) {
6134 err = PTR_ERR(obj);
7b225d0b 6135 goto err_parse_key_end;
8aeff920 6136 }
c39ba4de
PNA		 6137 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6138 if (err < 0)
6139 goto err_parse_key_end;
8aeff920
PNA		 6140 }
6141
20a69341 6142 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6143 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6144 nla[NFTA_SET_ELEM_DATA]);
20a69341 6145 if (err < 0)
7b225d0b 6146 goto err_parse_key_end;
20a69341 6147
20a69341
PM		 6148 dreg = nft_type_to_reg(set->dtype);
6149 list_for_each_entry(binding, &set->bindings, list) {
6150 struct nft_ctx bind_ctx = {
58c78e10 6151 .net = ctx->net,
36596dad 6152 .family = ctx->family,
20a69341 6153 .table = ctx->table,
7c95f6d8 6154 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6155 };
6156
11113e19
PM		 6157 if (!(binding->flags & NFT_SET_MAP))
6158 continue;
6159
1ec10212 6160 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6161 &elem.data.val,
20a1452c 6162 desc.type, desc.len);
20a69341 6163 if (err < 0)
7b225d0b 6164 goto err_parse_data;
a654de8f 6165
20a1452c 6166 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6167 (elem.data.val.verdict.code == NFT_GOTO ||
6168 elem.data.val.verdict.code == NFT_JUMP))
a654de8f
PNA		 6169 nft_validate_state_update(ctx->net,
6170 NFT_VALIDATE_NEED);
20a69341 6171 }
fe2811eb 6172
c39ba4de
PNA		 6173 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6174 if (err < 0)
6175 goto err_parse_data;
20a69341
PM		 6176 }
6177
68e942e8
PM		 6178 /* The full maximum length of userdata can exceed the maximum
6179 * offset value (U8_MAX) for following extensions, therefor it
6180 * must be the last extension added.
6181 */
6182 ulen = 0;
6183 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6184 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6185 if (ulen > 0) {
6186 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6187 ulen);
6188 if (err < 0)
6189 goto err_parse_data;
6190 }
68e942e8
PM		 6191 }
6192
7b225d0b 6193 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6194 elem.key_end.val.data, elem.data.val.data,
33758c89 6195 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6196 if (IS_ERR(elem.priv)) {
6197 err = PTR_ERR(elem.priv);
7b225d0b 6198 goto err_parse_data;
34aae2c2 6199 }
fe2811eb
PM		 6200
6201 ext = nft_set_elem_ext(set, elem.priv);
6202 if (flags)
6203 *nft_set_ext_flags(ext) = flags;
34aae2c2 6204
68e942e8 6205 if (ulen > 0) {
34aae2c2
PNA		 6206 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6207 err = -EINVAL;
6208 goto err_elem_userdata;
6209 }
68e942e8
PM		 6210 udata = nft_set_ext_userdata(ext);
6211 udata->len = ulen - 1;
6212 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6213 }
8aeff920
PNA		 6214 if (obj) {
6215 *nft_set_ext_obj(ext) = obj;
6216 obj->use++;
6217 }
34aae2c2 6218 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6219 if (err < 0)
34aae2c2 6220 goto err_elem_free;
fe2811eb 6221
60319eb1 6222 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6223 if (trans == NULL) {
6224 err = -ENOMEM;
34aae2c2 6225 goto err_elem_free;
4d8f9065 6226 }
60319eb1 6227
69086658 6228 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
aaa31047
PNA		 6229
6230 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
c016c7e4
PNA		 6231 if (err) {
6232 if (err == -EEXIST) {
9744a6fc
PNA		 6233 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6234 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6235 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6236 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6237 goto err_element_clash;
8aeff920
PNA		 6238 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6239 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6240 memcmp(nft_set_ext_data(ext),
6241 nft_set_ext_data(ext2), set->dlen) != 0) ||
6242 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6243 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6244 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6245 goto err_element_clash;
c016c7e4
PNA		 6246 else if (!(nlmsg_flags & NLM_F_EXCL))
6247 err = 0;
8c2d45b2
PNA		 6248 } else if (err == -ENOTEMPTY) {
6249 /* ENOTEMPTY reports overlapping between this element
6250 * and an existing one.
6251 */
6252 err = -EEXIST;
c016c7e4 6253 }
7b225d0b 6254 goto err_element_clash;
c016c7e4 6255 }
20a69341 6256
aaa31047 6257 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
35d0ac90
PNA		 6258 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
6259 err = -ENFILE;
7b225d0b 6260 goto err_set_full;
35d0ac90
PNA		 6261 }
6262
60319eb1 6263 nft_trans_elem(trans) = elem;
0854db2a 6264 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6265 return 0;
6266
7b225d0b 6267err_set_full:
aaa31047 6268 nft_setelem_remove(ctx->net, set, &elem);
7b225d0b 6269err_element_clash:
60319eb1 6270 kfree(trans);
34aae2c2 6271err_elem_free:
b91d9036
TY		 6272 if (obj)
6273 obj->use--;
34aae2c2 6274err_elem_userdata:
475beb9c 6275 nf_tables_set_elem_destroy(ctx, set, elem.priv);
7b225d0b 6276err_parse_data:
20a69341 6277 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6278 nft_data_release(&elem.data.val, desc.type);
7b225d0b
PNA		 6279err_parse_key_end:
6280 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6281err_parse_key:
20a1452c 6282 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6283err_set_elem_expr:
664899e8 6284 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6285 nft_expr_destroy(ctx, expr_array[i]);
6286err_set_elem_expr_clone:
20a69341
PM		 6287 return err;
6288}
6289
7dab8ee3
PNA		 6290static int nf_tables_newsetelem(struct sk_buff *skb,
6291 const struct nfnl_info *info,
6292 const struct nlattr * const nla[])
20a69341 6293{
7dab8ee3
PNA		 6294 struct nftables_pernet *nft_net = nft_pernet(info->net);
6295 struct netlink_ext_ack *extack = info->extack;
6296 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6297 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6298 struct net *net = info->net;
20a69341 6299 const struct nlattr *attr;
e2b750d7 6300 struct nft_table *table;
20a69341
PM		 6301 struct nft_set *set;
6302 struct nft_ctx ctx;
a654de8f 6303 int rem, err;
20a69341 6304
7d5570ca
PNA		 6305 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6306 return -EINVAL;
6307
e2b750d7
PNA		 6308 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6309 genmask, NETLINK_CB(skb).portid);
6310 if (IS_ERR(table)) {
6311 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6312 return PTR_ERR(table);
6313 }
20a69341 6314
e2b750d7 6315 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17
PNA		 6316 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6317 if (IS_ERR(set))
6318 return PTR_ERR(set);
958bee14 6319
20a69341
PM		 6320 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6321 return -EBUSY;
6322
e2b750d7
PNA		 6323 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6324
20a69341 6325 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6326 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6327 if (err < 0) {
6328 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6329 return err;
b53c1166 6330 }
20a69341 6331 }
a654de8f 6332
0854db2a 6333 if (nft_net->validate_state == NFT_VALIDATE_DO)
e2b750d7 6334 return nft_table_validate(net, table);
a654de8f
PNA		 6335
6336 return 0;
20a69341
PM		 6337}
6338
59105446
PNA		 6339/**
6340 * nft_data_hold - hold a nft_data item
6341 *
6342 * @data: struct nft_data to release
6343 * @type: type of data
6344 *
6345 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6346 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6347 * NFT_GOTO verdicts. This function must be called on active data objects
6348 * from the second phase of the commit protocol.
6349 */
bb7b40ae 6350void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 6351{
d0e2c7de
PNA		 6352 struct nft_chain *chain;
6353 struct nft_rule *rule;
6354
59105446
PNA		 6355 if (type == NFT_DATA_VERDICT) {
6356 switch (data->verdict.code) {
6357 case NFT_JUMP:
6358 case NFT_GOTO:
d0e2c7de
PNA		 6359 chain = data->verdict.chain;
6360 chain->use++;
6361
6362 if (!nft_chain_is_bound(chain))
6363 break;
6364
6365 chain->table->use++;
6366 list_for_each_entry(rule, &chain->rules, list)
6367 chain->use++;
6368
6369 nft_chain_add(chain->table, chain);
59105446
PNA		 6370 break;
6371 }
6372 }
6373}
6374
f8bb7889
PNA		 6375static void nft_setelem_data_activate(const struct net *net,
6376 const struct nft_set *set,
6377 struct nft_set_elem *elem)
59105446
PNA		 6378{
6379 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6380
6381 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6382 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6383 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6384 (*nft_set_ext_obj(ext))->use++;
6385}
6386
f8bb7889
PNA		 6387static void nft_setelem_data_deactivate(const struct net *net,
6388 const struct nft_set *set,
6389 struct nft_set_elem *elem)
59105446
PNA		 6390{
6391 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6392
6393 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6394 nft_data_release(nft_set_ext_data(ext), set->dtype);
6395 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6396 (*nft_set_ext_obj(ext))->use--;
6397}
6398
60319eb1 6399static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 6400 const struct nlattr *attr)
6401{
6402 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 6403 struct nft_set_ext_tmpl tmpl;
20a69341 6404 struct nft_set_elem elem;
3971ca14 6405 struct nft_set_ext *ext;
60319eb1 6406 struct nft_trans *trans;
3971ca14 6407 u32 flags = 0;
20a69341
PM		 6408 int err;
6409
8cb08174
JB		 6410 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6411 nft_set_elem_policy, NULL);
20a69341 6412 if (err < 0)
20a1452c 6413 return err;
20a69341 6414
aaa31047
PNA		 6415 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6416 if (err < 0)
6417 return err;
6418
6419 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 6420 return -EINVAL;
20a69341 6421
88cccd90
PNA		 6422 if (!nft_setelem_valid_key_end(set, nla, flags))
6423 return -EINVAL;
6424
3971ca14
PNA		 6425 nft_set_ext_prepare(&tmpl);
6426
c39ba4de
PNA		 6427 if (flags != 0) {
6428 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6429 if (err < 0)
6430 return err;
6431 }
3971ca14 6432
aaa31047
PNA		 6433 if (nla[NFTA_SET_ELEM_KEY]) {
6434 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6435 nla[NFTA_SET_ELEM_KEY]);
6436 if (err < 0)
6437 return err;
20a69341 6438
c39ba4de
PNA		 6439 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6440 if (err < 0)
6441 goto fail_elem;
aaa31047 6442 }
3971ca14 6443
7b225d0b
PNA		 6444 if (nla[NFTA_SET_ELEM_KEY_END]) {
6445 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6446 nla[NFTA_SET_ELEM_KEY_END]);
6447 if (err < 0)
c39ba4de 6448 goto fail_elem;
7b225d0b 6449
c39ba4de
PNA		 6450 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6451 if (err < 0)
6452 goto fail_elem_key_end;
7b225d0b
PNA		 6453 }
6454
3971ca14 6455 err = -ENOMEM;
7b225d0b
PNA		 6456 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6457 elem.key_end.val.data, NULL, 0, 0,
33758c89 6458 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6459 if (IS_ERR(elem.priv)) {
6460 err = PTR_ERR(elem.priv);
c39ba4de 6461 goto fail_elem_key_end;
34aae2c2 6462 }
3971ca14
PNA		 6463
6464 ext = nft_set_elem_ext(set, elem.priv);
6465 if (flags)
6466 *nft_set_ext_flags(ext) = flags;
6467
60319eb1 6468 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 6469 if (trans == NULL)
6470 goto fail_trans;
20a69341 6471
aaa31047
PNA		 6472 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6473 if (err < 0)
20a1452c 6474 goto fail_ops;
cc02e457 6475
f8bb7889 6476 nft_setelem_data_deactivate(ctx->net, set, &elem);
59105446 6477
60319eb1 6478 nft_trans_elem(trans) = elem;
0854db2a 6479 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 6480 return 0;
cc02e457 6481
20a1452c 6482fail_ops:
cc02e457 6483 kfree(trans);
20a1452c 6484fail_trans:
3971ca14 6485 kfree(elem.priv);
c39ba4de
PNA		 6486fail_elem_key_end:
6487 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 6488fail_elem:
6489 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 6490 return err;
6491}
6492
e6ba7cb6
PNA		 6493static int nft_setelem_flush(const struct nft_ctx *ctx,
6494 struct nft_set *set,
6495 const struct nft_set_iter *iter,
6496 struct nft_set_elem *elem)
8411b644
PNA		 6497{
6498 struct nft_trans *trans;
6499 int err;
6500
6501 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6502 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6503 if (!trans)
6504 return -ENOMEM;
6505
1ba1c414 6506 if (!set->ops->flush(ctx->net, set, elem->priv)) {
8411b644
PNA		 6507 err = -ENOENT;
6508 goto err1;
6509 }
b2c11e4b 6510 set->ndeact++;
8411b644 6511
f8bb7889 6512 nft_setelem_data_deactivate(ctx->net, set, elem);
de70185d
PNA		 6513 nft_trans_elem_set(trans) = set;
6514 nft_trans_elem(trans) = *elem;
0854db2a 6515 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 6516
6517 return 0;
6518err1:
6519 kfree(trans);
6520 return err;
6521}
6522
aaa31047
PNA		 6523static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6524 struct nft_set *set,
6525 struct nft_set_elem *elem)
6526{
6527 struct nft_trans *trans;
6528
6529 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6530 sizeof(struct nft_trans_elem), GFP_KERNEL);
6531 if (!trans)
6532 return -ENOMEM;
6533
6534 nft_setelem_data_deactivate(ctx->net, set, elem);
6535 nft_trans_elem_set(trans) = set;
6536 nft_trans_elem(trans) = *elem;
6537 nft_trans_commit_list_add_tail(ctx->net, trans);
6538
6539 return 0;
6540}
6541
6542static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6543 struct nft_set *set)
6544{
6545 u8 genmask = nft_genmask_next(ctx->net);
6546 struct nft_set_elem_catchall *catchall;
6547 struct nft_set_elem elem;
6548 struct nft_set_ext *ext;
6549 int ret = 0;
6550
6551 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6552 ext = nft_set_elem_ext(set, catchall->elem);
6553 if (!nft_set_elem_active(ext, genmask) ||
6554 nft_set_elem_mark_busy(ext))
6555 continue;
6556
6557 elem.priv = catchall->elem;
6558 ret = __nft_set_catchall_flush(ctx, set, &elem);
6559 if (ret < 0)
6560 break;
6561 }
6562
6563 return ret;
6564}
6565
e6ba7cb6
PNA		 6566static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
6567{
6568 struct nft_set_iter iter = {
6569 .genmask = genmask,
6570 .fn = nft_setelem_flush,
6571 };
6572
6573 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 6574 if (!iter.err)
6575 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 6576
6577 return iter.err;
6578}
6579
7dab8ee3
PNA		 6580static int nf_tables_delsetelem(struct sk_buff *skb,
6581 const struct nfnl_info *info,
6582 const struct nlattr * const nla[])
20a69341 6583{
7dab8ee3
PNA		 6584 struct netlink_ext_ack *extack = info->extack;
6585 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6586 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6587 struct net *net = info->net;
20a69341 6588 const struct nlattr *attr;
e2b750d7 6589 struct nft_table *table;
20a69341
PM		 6590 struct nft_set *set;
6591 struct nft_ctx ctx;
60319eb1 6592 int rem, err = 0;
20a69341 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(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
20a69341
PM		 6602 if (IS_ERR(set))
6603 return PTR_ERR(set);
6604 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6605 return -EBUSY;
6606
e2b750d7
PNA		 6607 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6608
e6ba7cb6
PNA		 6609 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6610 return nft_set_flush(&ctx, set, genmask);
8411b644 6611
20a69341
PM		 6612 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6613 err = nft_del_setelem(&ctx, set, attr);
b53c1166
PNA		 6614 if (err < 0) {
6615 NL_SET_BAD_ATTR(extack, attr);
60319eb1 6616 break;
b53c1166 6617 }
20a69341 6618 }
60319eb1 6619 return err;
20a69341
PM		 6620}
6621
cfed7e1b
PM		 6622void nft_set_gc_batch_release(struct rcu_head *rcu)
6623{
6624 struct nft_set_gc_batch *gcb;
6625 unsigned int i;
6626
6627 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
6628 for (i = 0; i < gcb->head.cnt; i++)
61f9e292 6629 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
cfed7e1b
PM		 6630 kfree(gcb);
6631}
cfed7e1b
PM		 6632
6633struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
6634 gfp_t gfp)
6635{
6636 struct nft_set_gc_batch *gcb;
6637
6638 gcb = kzalloc(sizeof(*gcb), gfp);
6639 if (gcb == NULL)
6640 return gcb;
6641 gcb->head.set = set;
6642 return gcb;
6643}
cfed7e1b 6644
e5009240
PNA		 6645/*
6646 * Stateful objects
6647 */
6648
6649/**
6650 * nft_register_obj- register nf_tables stateful object type
3db86c39 6651 * @obj_type: object type
e5009240
PNA		 6652 *
6653 * Registers the object type for use with nf_tables. Returns zero on
6654 * success or a negative errno code otherwise.
6655 */
6656int nft_register_obj(struct nft_object_type *obj_type)
6657{
6658 if (obj_type->type == NFT_OBJECT_UNSPEC)
6659 return -EINVAL;
6660
6661 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6662 list_add_rcu(&obj_type->list, &nf_tables_objects);
6663 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6664 return 0;
6665}
6666EXPORT_SYMBOL_GPL(nft_register_obj);
6667
6668/**
6669 * nft_unregister_obj - unregister nf_tables object type
3db86c39 6670 * @obj_type: object type
e5009240
PNA		 6671 *
6672 * Unregisters the object type for use with nf_tables.
6673 */
6674void nft_unregister_obj(struct nft_object_type *obj_type)
6675{
6676 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6677 list_del_rcu(&obj_type->list);
6678 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6679}
6680EXPORT_SYMBOL_GPL(nft_unregister_obj);
6681
4d44175a
FW		 6682struct nft_object *nft_obj_lookup(const struct net *net,
6683 const struct nft_table *table,
cac20fcd
PNA		 6684 const struct nlattr *nla, u32 objtype,
6685 u8 genmask)
e5009240 6686{
4d44175a
FW		 6687 struct nft_object_hash_key k = { .table = table };
6688 char search[NFT_OBJ_MAXNAMELEN];
6689 struct rhlist_head *tmp, *list;
e5009240
PNA		 6690 struct nft_object *obj;
6691
872f6903 6692 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 6693 k.name = search;
6694
6695 WARN_ON_ONCE(!rcu_read_lock_held() &&
6696 !lockdep_commit_lock_is_held(net));
6697
6698 rcu_read_lock();
6699 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
6700 if (!list)
6701 goto out;
6702
6703 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
6704 if (objtype == obj->ops->type->type &&
6705 nft_active_genmask(obj, genmask)) {
6706 rcu_read_unlock();
e5009240 6707 return obj;
4d44175a 6708 }
e5009240 6709 }
4d44175a
FW		 6710out:
6711 rcu_read_unlock();
e5009240
PNA		 6712 return ERR_PTR(-ENOENT);
6713}
cac20fcd 6714EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 6715
cac20fcd
PNA		 6716static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
6717 const struct nlattr *nla,
6718 u32 objtype, u8 genmask)
3ecbfd65
HS		 6719{
6720 struct nft_object *obj;
6721
6722 list_for_each_entry(obj, &table->objects, list) {
6723 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
6724 objtype == obj->ops->type->type &&
6725 nft_active_genmask(obj, genmask))
6726 return obj;
6727 }
6728 return ERR_PTR(-ENOENT);
6729}
6730
e5009240 6731static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 6732 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
6733 .len = NFT_TABLE_MAXNAMELEN - 1 },
6734 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
6735 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 6736 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
6737 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 6738 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 6739 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
6740 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 6741};
6742
84fba055
FW		 6743static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
6744 const struct nft_object_type *type,
e5009240
PNA		 6745 const struct nlattr *attr)
6746{
5b4c6e38 6747 struct nlattr **tb;
dfc46034 6748 const struct nft_object_ops *ops;
e5009240 6749 struct nft_object *obj;
5b4c6e38
GS		 6750 int err = -ENOMEM;
6751
6752 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
6753 if (!tb)
6754 goto err1;
e5009240
PNA		 6755
6756 if (attr) {
8cb08174
JB		 6757 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
6758 type->policy, NULL);
e5009240 6759 if (err < 0)
5b4c6e38 6760 goto err2;
e5009240
PNA		 6761 } else {
6762 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
6763 }
6764
dfc46034
PBG		 6765 if (type->select_ops) {
6766 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
6767 if (IS_ERR(ops)) {
6768 err = PTR_ERR(ops);
5b4c6e38 6769 goto err2;
dfc46034
PBG		 6770 }
6771 } else {
6772 ops = type->ops;
6773 }
6774
e5009240 6775 err = -ENOMEM;
33758c89 6776 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 6777 if (!obj)
6778 goto err2;
e5009240 6779
dfc46034 6780 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 6781 if (err < 0)
5b4c6e38 6782 goto err3;
e5009240 6783
dfc46034
PBG		 6784 obj->ops = ops;
6785
5b4c6e38 6786 kfree(tb);
e5009240 6787 return obj;
5b4c6e38 6788err3:
e5009240 6789 kfree(obj);
5b4c6e38
GS		 6790err2:
6791 kfree(tb);
e5009240
PNA		 6792err1:
6793 return ERR_PTR(err);
6794}
6795
6796static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 6797 struct nft_object *obj, bool reset)
e5009240
PNA		 6798{
6799 struct nlattr *nest;
6800
ae0be8de 6801 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 6802 if (!nest)
6803 goto nla_put_failure;
dfc46034 6804 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 6805 goto nla_put_failure;
6806 nla_nest_end(skb, nest);
6807 return 0;
6808
6809nla_put_failure:
6810 return -1;
6811}
6812
6813static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
6814{
6815 const struct nft_object_type *type;
6816
6817 list_for_each_entry(type, &nf_tables_objects, list) {
6818 if (objtype == type->type)
6819 return type;
6820 }
6821 return NULL;
6822}
6823
452238e8
FW		 6824static const struct nft_object_type *
6825nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 6826{
6827 const struct nft_object_type *type;
6828
6829 type = __nft_obj_type_get(objtype);
6830 if (type != NULL && try_module_get(type->owner))
6831 return type;
6832
f102d66b 6833 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 6834#ifdef CONFIG_MODULES
6835 if (type == NULL) {
eb014de4 6836 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 6837 return ERR_PTR(-EAGAIN);
6838 }
6839#endif
6840 return ERR_PTR(-ENOENT);
6841}
6842
d62d0ba9
FFM		 6843static int nf_tables_updobj(const struct nft_ctx *ctx,
6844 const struct nft_object_type *type,
6845 const struct nlattr *attr,
6846 struct nft_object *obj)
6847{
6848 struct nft_object *newobj;
6849 struct nft_trans *trans;
dad3bdee
FW		 6850 int err = -ENOMEM;
6851
6852 if (!try_module_get(type->owner))
6853 return -ENOENT;
d62d0ba9
FFM		 6854
6855 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
6856 sizeof(struct nft_trans_obj));
6857 if (!trans)
dad3bdee 6858 goto err_trans;
d62d0ba9
FFM		 6859
6860 newobj = nft_obj_init(ctx, type, attr);
6861 if (IS_ERR(newobj)) {
6862 err = PTR_ERR(newobj);
b74ae961 6863 goto err_free_trans;
d62d0ba9
FFM		 6864 }
6865
6866 nft_trans_obj(trans) = obj;
6867 nft_trans_obj_update(trans) = true;
6868 nft_trans_obj_newobj(trans) = newobj;
0854db2a 6869 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 6870
6871 return 0;
b74ae961
DC		 6872
6873err_free_trans:
d62d0ba9 6874 kfree(trans);
dad3bdee
FW		 6875err_trans:
6876 module_put(type->owner);
d62d0ba9
FFM		 6877 return err;
6878}
6879
7dab8ee3
PNA		 6880static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
6881 const struct nlattr * const nla[])
e5009240 6882{
7dab8ee3
PNA		 6883 struct netlink_ext_ack *extack = info->extack;
6884 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 6885 u8 family = info->nfmsg->nfgen_family;
e5009240 6886 const struct nft_object_type *type;
7dab8ee3 6887 struct net *net = info->net;
e5009240
PNA		 6888 struct nft_table *table;
6889 struct nft_object *obj;
6890 struct nft_ctx ctx;
6891 u32 objtype;
6892 int err;
6893
6894 if (!nla[NFTA_OBJ_TYPE] ||
6895 !nla[NFTA_OBJ_NAME] ||
6896 !nla[NFTA_OBJ_DATA])
6897 return -EINVAL;
6898
6001a930
PNA		 6899 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
6900 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 6901 if (IS_ERR(table)) {
6902 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 6903 return PTR_ERR(table);
36dd1bcc 6904 }
e5009240
PNA		 6905
6906 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 6907 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 6908 if (IS_ERR(obj)) {
6909 err = PTR_ERR(obj);
36dd1bcc
PNA		 6910 if (err != -ENOENT) {
6911 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 6912 return err;
36dd1bcc 6913 }
1a28ad74 6914 } else {
7dab8ee3 6915 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 6916 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 6917 return -EEXIST;
36dd1bcc 6918 }
7dab8ee3 6919 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 6920 return -EOPNOTSUPP;
6921
fd57d0cb 6922 type = __nft_obj_type_get(objtype);
7dab8ee3 6923 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 6924
6925 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 6926 }
6927
7dab8ee3 6928 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 6929
452238e8 6930 type = nft_obj_type_get(net, objtype);
e5009240
PNA		 6931 if (IS_ERR(type))
6932 return PTR_ERR(type);
6933
84fba055 6934 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 6935 if (IS_ERR(obj)) {
6936 err = PTR_ERR(obj);
b131c964 6937 goto err_init;
e5009240 6938 }
d152159b 6939 obj->key.table = table;
3ecbfd65
HS		 6940 obj->handle = nf_tables_alloc_handle(table);
6941
33758c89 6942 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 6943 if (!obj->key.name) {
61509575 6944 err = -ENOMEM;
b131c964
JGG		 6945 goto err_strdup;
6946 }
6947
6948 if (nla[NFTA_OBJ_USERDATA]) {
85db827a 6949 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL);
b131c964
JGG		 6950 if (obj->udata == NULL)
6951 goto err_userdata;
6952
85db827a 6953 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 6954 }
e5009240
PNA		 6955
6956 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
6957 if (err < 0)
b131c964 6958 goto err_trans;
e5009240 6959
4d44175a
FW		 6960 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
6961 nft_objname_ht_params);
6962 if (err < 0)
b131c964 6963 goto err_obj_ht;
4d44175a 6964
e5009240
PNA		 6965 list_add_tail_rcu(&obj->list, &table->objects);
6966 table->use++;
6967 return 0;
b131c964 6968err_obj_ht:
4d44175a
FW		 6969 /* queued in transaction log */
6970 INIT_LIST_HEAD(&obj->list);
6971 return err;
b131c964 6972err_trans:
b131c964 6973 kfree(obj->udata);
85dfd816
PNA		 6974err_userdata:
6975 kfree(obj->key.name);
b131c964 6976err_strdup:
dfc46034 6977 if (obj->ops->destroy)
00bfb320 6978 obj->ops->destroy(&ctx, obj);
e5009240 6979 kfree(obj);
b131c964 6980err_init:
e5009240
PNA		 6981 module_put(type->owner);
6982 return err;
6983}
6984
6985static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
6986 u32 portid, u32 seq, int event, u32 flags,
6987 int family, const struct nft_table *table,
43da04a5 6988 struct nft_object *obj, bool reset)
e5009240 6989{
e5009240
PNA		 6990 struct nlmsghdr *nlh;
6991
dedb67c4 6992 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 6993 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
6994 NFNETLINK_V0, nft_base_seq(net));
6995 if (!nlh)
e5009240
PNA		 6996 goto nla_put_failure;
6997
e5009240 6998 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 6999 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
dfc46034 7000 nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
e5009240 7001 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
3ecbfd65
HS		 7002 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset) ||
7003 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7004 NFTA_OBJ_PAD))
e5009240
PNA		 7005 goto nla_put_failure;
7006
b131c964
JGG		 7007 if (obj->udata &&
7008 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7009 goto nla_put_failure;
7010
e5009240
PNA		 7011 nlmsg_end(skb, nlh);
7012 return 0;
7013
7014nla_put_failure:
7015 nlmsg_trim(skb, nlh);
7016 return -1;
7017}
7018
a9fea2a3 7019struct nft_obj_filter {
e46abbcc 7020 char *table;
a9fea2a3
PNA		 7021 u32 type;
7022};
7023
e5009240
PNA		 7024static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7025{
7026 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
e5009240 7027 const struct nft_table *table;
e5009240 7028 unsigned int idx = 0, s_idx = cb->args[0];
a9fea2a3 7029 struct nft_obj_filter *filter = cb->data;
e5009240
PNA		 7030 struct net *net = sock_net(skb->sk);
7031 int family = nfmsg->nfgen_family;
0854db2a 7032 struct nftables_pernet *nft_net;
43da04a5
PNA		 7033 struct nft_object *obj;
7034 bool reset = false;
7035
7036 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7037 reset = true;
e5009240
PNA		 7038
7039 rcu_read_lock();
d59d2f82 7040 nft_net = nft_pernet(net);
34002783 7041 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 7042
0854db2a 7043 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7044 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 7045 continue;
7046
36596dad
PNA		 7047 list_for_each_entry_rcu(obj, &table->objects, list) {
7048 if (!nft_is_active(net, obj))
7049 goto cont;
7050 if (idx < s_idx)
7051 goto cont;
7052 if (idx > s_idx)
7053 memset(&cb->args[1], 0,
7054 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7055 if (filter && filter->table &&
36596dad
PNA		 7056 strcmp(filter->table, table->name))
7057 goto cont;
7058 if (filter &&
7059 filter->type != NFT_OBJECT_UNSPEC &&
7060 obj->ops->type->type != filter->type)
7061 goto cont;
8e6cf365 7062 if (reset) {
68df2ed5 7063 char *buf = kasprintf(GFP_ATOMIC,
c520292f 7064 "%s:%u",
8e6cf365 7065 table->name,
0854db2a 7066 nft_net->base_seq);
8e6cf365
RGB		 7067
7068 audit_log_nfcfg(buf,
7069 family,
7070 obj->handle,
14224039 7071 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7072 GFP_ATOMIC);
8e6cf365
RGB		 7073 kfree(buf);
7074 }
7075
36596dad
PNA		 7076 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7077 cb->nlh->nlmsg_seq,
7078 NFT_MSG_NEWOBJ,
7079 NLM_F_MULTI | NLM_F_APPEND,
98319cb9 7080 table->family, table,
36596dad
PNA		 7081 obj, reset) < 0)
7082 goto done;
e5009240 7083
36596dad 7084 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7085cont:
36596dad 7086 idx++;
e5009240
PNA		 7087 }
7088 }
7089done:
7090 rcu_read_unlock();
7091
7092 cb->args[0] = idx;
7093 return skb->len;
7094}
7095
90fd131a 7096static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7097{
90fd131a
FW		 7098 const struct nlattr * const *nla = cb->data;
7099 struct nft_obj_filter *filter = NULL;
e46abbcc 7100
90fd131a
FW		 7101 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7102 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7103 if (!filter)
7104 return -ENOMEM;
7105
7106 if (nla[NFTA_OBJ_TABLE]) {
7107 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7108 if (!filter->table) {
7109 kfree(filter);
7110 return -ENOMEM;
7111 }
7112 }
7113
7114 if (nla[NFTA_OBJ_TYPE])
7115 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
8bea728d 7116 }
a9fea2a3 7117
90fd131a 7118 cb->data = filter;
a9fea2a3
PNA		 7119 return 0;
7120}
7121
90fd131a 7122static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7123{
90fd131a 7124 struct nft_obj_filter *filter = cb->data;
a9fea2a3 7125
90fd131a
FW		 7126 if (filter) {
7127 kfree(filter->table);
7128 kfree(filter);
e46abbcc 7129 }
a9fea2a3 7130
90fd131a 7131 return 0;
a9fea2a3
PNA		 7132}
7133
d9adf22a 7134/* called with rcu_read_lock held */
797d4980
PNA		 7135static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7136 const struct nlattr * const nla[])
e5009240 7137{
797d4980
PNA		 7138 struct netlink_ext_ack *extack = info->extack;
7139 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7140 u8 family = info->nfmsg->nfgen_family;
e5009240 7141 const struct nft_table *table;
797d4980 7142 struct net *net = info->net;
e5009240
PNA		 7143 struct nft_object *obj;
7144 struct sk_buff *skb2;
43da04a5 7145 bool reset = false;
e5009240
PNA		 7146 u32 objtype;
7147 int err;
7148
797d4980 7149 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7150 struct netlink_dump_control c = {
90fd131a 7151 .start = nf_tables_dump_obj_start,
e5009240 7152 .dump = nf_tables_dump_obj,
a9fea2a3 7153 .done = nf_tables_dump_obj_done,
d9adf22a 7154 .module = THIS_MODULE,
90fd131a 7155 .data = (void *)nla,
e5009240 7156 };
a9fea2a3 7157
797d4980 7158 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7159 }
7160
7161 if (!nla[NFTA_OBJ_NAME] ||
7162 !nla[NFTA_OBJ_TYPE])
7163 return -EINVAL;
7164
6001a930 7165 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7166 if (IS_ERR(table)) {
7167 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7168 return PTR_ERR(table);
36dd1bcc 7169 }
e5009240
PNA		 7170
7171 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7172 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7173 if (IS_ERR(obj)) {
7174 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7175 return PTR_ERR(obj);
36dd1bcc 7176 }
e5009240 7177
d9adf22a 7178 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7179 if (!skb2)
7180 return -ENOMEM;
7181
797d4980 7182 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7183 reset = true;
7184
8e6cf365 7185 if (reset) {
0854db2a
FW		 7186 const struct nftables_pernet *nft_net;
7187 char *buf;
7188
d59d2f82 7189 nft_net = nft_pernet(net);
0854db2a 7190 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7191
7192 audit_log_nfcfg(buf,
7193 family,
7194 obj->handle,
14224039 7195 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7196 GFP_ATOMIC);
8e6cf365
RGB		 7197 kfree(buf);
7198 }
7199
e5009240 7200 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7201 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7202 family, table, obj, reset);
e5009240 7203 if (err < 0)
ee921183 7204 goto err_fill_obj_info;
e5009240 7205
ee921183
PNA		 7206 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7207
7208err_fill_obj_info:
e5009240
PNA		 7209 kfree_skb(skb2);
7210 return err;
e5009240
PNA		 7211}
7212
00bfb320 7213static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7214{
dfc46034 7215 if (obj->ops->destroy)
00bfb320 7216 obj->ops->destroy(ctx, obj);
e5009240 7217
dfc46034 7218 module_put(obj->ops->type->owner);
d152159b 7219 kfree(obj->key.name);
bc7a7082 7220 kfree(obj->udata);
e5009240
PNA		 7221 kfree(obj);
7222}
7223
7dab8ee3
PNA		 7224static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7225 const struct nlattr * const nla[])
e5009240 7226{
7dab8ee3
PNA		 7227 struct netlink_ext_ack *extack = info->extack;
7228 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7229 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7230 struct net *net = info->net;
36dd1bcc 7231 const struct nlattr *attr;
e5009240
PNA		 7232 struct nft_table *table;
7233 struct nft_object *obj;
7234 struct nft_ctx ctx;
7235 u32 objtype;
7236
7237 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7238 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7239 return -EINVAL;
7240
6001a930
PNA		 7241 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7242 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7243 if (IS_ERR(table)) {
7244 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7245 return PTR_ERR(table);
36dd1bcc 7246 }
e5009240
PNA		 7247
7248 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7249 if (nla[NFTA_OBJ_HANDLE]) {
7250 attr = nla[NFTA_OBJ_HANDLE];
7251 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7252 } else {
7253 attr = nla[NFTA_OBJ_NAME];
4d44175a 7254 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7255 }
7256
7257 if (IS_ERR(obj)) {
7258 NL_SET_BAD_ATTR(extack, attr);
e5009240 7259 return PTR_ERR(obj);
36dd1bcc
PNA		 7260 }
7261 if (obj->use > 0) {
7262 NL_SET_BAD_ATTR(extack, attr);
e5009240 7263 return -EBUSY;
36dd1bcc 7264 }
e5009240 7265
7dab8ee3 7266 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7267
7268 return nft_delobj(&ctx, obj);
7269}
7270
d152159b 7271void nft_obj_notify(struct net *net, const struct nft_table *table,
25e94a99 7272 struct nft_object *obj, u32 portid, u32 seq, int event,
6fb721cf 7273 u16 flags, int family, int report, gfp_t gfp)
e5009240 7274{
d59d2f82 7275 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7276 struct sk_buff *skb;
7277 int err;
c520292f 7278 char *buf = kasprintf(gfp, "%s:%u",
0854db2a 7279 table->name, nft_net->base_seq);
8e6cf365
RGB		 7280
7281 audit_log_nfcfg(buf,
7282 family,
7283 obj->handle,
7284 event == NFT_MSG_NEWOBJ ?
c520292f
RGB		 7285 AUDIT_NFT_OP_OBJ_REGISTER :
7286 AUDIT_NFT_OP_OBJ_UNREGISTER,
68df2ed5 7287 gfp);
8e6cf365 7288 kfree(buf);
e5009240 7289
2599e989
PNA		 7290 if (!report &&
7291 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7292 return;
e5009240 7293
2599e989 7294 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7295 if (skb == NULL)
7296 goto err;
7297
6fb721cf
PNA		 7298 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7299 flags & (NLM_F_CREATE | NLM_F_EXCL),
7300 family, table, obj, false);
e5009240
PNA		 7301 if (err < 0) {
7302 kfree_skb(skb);
7303 goto err;
7304 }
7305
0854db2a 7306 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7307 return;
e5009240 7308err:
25e94a99 7309 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7310}
2599e989
PNA		 7311EXPORT_SYMBOL_GPL(nft_obj_notify);
7312
25e94a99
PNA		 7313static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7314 struct nft_object *obj, int event)
2599e989 7315{
25e94a99 7316 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
6fb721cf 7317 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
2599e989 7318}
e5009240 7319
3b49e2e9
PNA		 7320/*
7321 * Flow tables
7322 */
7323void nft_register_flowtable_type(struct nf_flowtable_type *type)
7324{
7325 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7326 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7327 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7328}
7329EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7330
7331void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7332{
7333 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7334 list_del_rcu(&type->list);
7335 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7336}
7337EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7338
7339static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7340 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7341 .len = NFT_NAME_MAXLEN - 1 },
7342 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7343 .len = NFT_NAME_MAXLEN - 1 },
7344 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 7345 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 7346 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 7347};
7348
cac20fcd
PNA		 7349struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7350 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 7351{
7352 struct nft_flowtable *flowtable;
7353
d9adf22a 7354 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 7355 if (!nla_strcmp(nla, flowtable->name) &&
7356 nft_active_genmask(flowtable, genmask))
7357 return flowtable;
7358 }
7359 return ERR_PTR(-ENOENT);
7360}
cac20fcd 7361EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 7362
9b05b6e1
LGL		 7363void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7364 struct nft_flowtable *flowtable,
7365 enum nft_trans_phase phase)
7366{
7367 switch (phase) {
7368 case NFT_TRANS_PREPARE:
7369 case NFT_TRANS_ABORT:
7370 case NFT_TRANS_RELEASE:
7371 flowtable->use--;
954d8297 7372 fallthrough;
9b05b6e1
LGL		 7373 default:
7374 return;
7375 }
7376}
7377EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7378
ae0662f8 7379static struct nft_flowtable *
cac20fcd
PNA		 7380nft_flowtable_lookup_byhandle(const struct nft_table *table,
7381 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 7382{
7383 struct nft_flowtable *flowtable;
7384
7385 list_for_each_entry(flowtable, &table->flowtables, list) {
7386 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7387 nft_active_genmask(flowtable, genmask))
7388 return flowtable;
7389 }
7390 return ERR_PTR(-ENOENT);
7391}
7392
d9246a53
PNA		 7393struct nft_flowtable_hook {
7394 u32 num;
7395 int priority;
7396 struct list_head list;
7397};
7398
3b49e2e9
PNA		 7399static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7400 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7401 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7402 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7403};
7404
d9246a53
PNA		 7405static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
7406 const struct nlattr *attr,
7407 struct nft_flowtable_hook *flowtable_hook,
5b6743fb 7408 struct nft_flowtable *flowtable, bool add)
3b49e2e9 7409{
3b49e2e9 7410 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 7411 struct nft_hook *hook;
3b49e2e9 7412 int hooknum, priority;
3f0465a9 7413 int err;
3b49e2e9 7414
d9246a53
PNA		 7415 INIT_LIST_HEAD(&flowtable_hook->list);
7416
8cb08174
JB		 7417 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX, attr,
7418 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 7419 if (err < 0)
7420 return err;
7421
5b6743fb
PNA		 7422 if (add) {
7423 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
7424 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY])
7425 return -EINVAL;
3b49e2e9 7426
5b6743fb
PNA		 7427 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7428 if (hooknum != NF_NETDEV_INGRESS)
7429 return -EOPNOTSUPP;
7430
7431 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7432
7433 flowtable_hook->priority = priority;
7434 flowtable_hook->num = hooknum;
7435 } else {
7436 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7437 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7438 if (hooknum != flowtable->hooknum)
7439 return -EOPNOTSUPP;
7440 }
7441
7442 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7443 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7444 if (priority != flowtable->data.priority)
7445 return -EOPNOTSUPP;
7446 }
3b49e2e9 7447
5b6743fb
PNA		 7448 flowtable_hook->priority = flowtable->data.priority;
7449 flowtable_hook->num = flowtable->hooknum;
7450 }
3b49e2e9 7451
05abe445
PNA		 7452 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7453 err = nf_tables_parse_netdev_hooks(ctx->net,
7454 tb[NFTA_FLOWTABLE_HOOK_DEVS],
7455 &flowtable_hook->list);
7456 if (err < 0)
7457 return err;
7458 }
3b49e2e9 7459
d9246a53 7460 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 7461 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 7462 hook->ops.hooknum = flowtable_hook->num;
7463 hook->ops.priority = flowtable_hook->priority;
7464 hook->ops.priv = &flowtable->data;
7465 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 7466 }
7467
3b49e2e9
PNA		 7468 return err;
7469}
7470
98319cb9 7471static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 7472{
7473 const struct nf_flowtable_type *type;
7474
7475 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 7476 if (family == type->family)
3b49e2e9
PNA		 7477 return type;
7478 }
7479 return NULL;
7480}
7481
452238e8
FW		 7482static const struct nf_flowtable_type *
7483nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 7484{
7485 const struct nf_flowtable_type *type;
7486
98319cb9 7487 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 7488 if (type != NULL && try_module_get(type->owner))
7489 return type;
7490
f102d66b 7491 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 7492#ifdef CONFIG_MODULES
7493 if (type == NULL) {
eb014de4 7494 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 7495 return ERR_PTR(-EAGAIN);
7496 }
7497#endif
7498 return ERR_PTR(-ENOENT);
7499}
7500
5acab914 7501/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 7502static void nft_unregister_flowtable_hook(struct net *net,
7503 struct nft_flowtable *flowtable,
7504 struct nft_hook *hook)
7505{
7506 nf_unregister_net_hook(net, &hook->ops);
7507 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7508 FLOW_BLOCK_UNBIND);
7509}
7510
f9a43007
PNA		 7511static void __nft_unregister_flowtable_net_hooks(struct net *net,
7512 struct list_head *hook_list,
7513 bool release_netdev)
3b49e2e9 7514{
f9a43007 7515 struct nft_hook *hook, *next;
3b49e2e9 7516
f9a43007 7517 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 7518 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 7519 if (release_netdev) {
7520 list_del(&hook->list);
ab5e5c06 7521 kfree_rcu(hook, rcu);
f9a43007
PNA		 7522 }
7523 }
7524}
7525
7526static void nft_unregister_flowtable_net_hooks(struct net *net,
7527 struct list_head *hook_list)
7528{
7529 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 7530}
7531
7532static int nft_register_flowtable_net_hooks(struct net *net,
7533 struct nft_table *table,
f9382669 7534 struct list_head *hook_list,
3f0465a9
PNA		 7535 struct nft_flowtable *flowtable)
7536{
7537 struct nft_hook *hook, *hook2, *next;
7538 struct nft_flowtable *ft;
7539 int err, i = 0;
7540
f9382669 7541 list_for_each_entry(hook, hook_list, list) {
3f0465a9 7542 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 7543 if (!nft_is_active_next(net, ft))
7544 continue;
7545
3f0465a9
PNA		 7546 list_for_each_entry(hook2, &ft->hook_list, list) {
7547 if (hook->ops.dev == hook2->ops.dev &&
7548 hook->ops.pf == hook2->ops.pf) {
77a92189 7549 err = -EEXIST;
3f0465a9
PNA		 7550 goto err_unregister_net_hooks;
7551 }
7552 }
7553 }
3b49e2e9 7554
d7c03a9f 7555 err = flowtable->data.type->setup(&flowtable->data,
7556 hook->ops.dev,
7557 FLOW_BLOCK_BIND);
3f0465a9
PNA		 7558 if (err < 0)
7559 goto err_unregister_net_hooks;
7560
d7c03a9f 7561 err = nf_register_net_hook(net, &hook->ops);
7562 if (err < 0) {
7563 flowtable->data.type->setup(&flowtable->data,
7564 hook->ops.dev,
7565 FLOW_BLOCK_UNBIND);
7566 goto err_unregister_net_hooks;
7567 }
7568
3f0465a9 7569 i++;
3b49e2e9 7570 }
3f0465a9
PNA		 7571
7572 return 0;
7573
7574err_unregister_net_hooks:
f9382669 7575 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 7576 if (i-- <= 0)
7577 break;
7578
ff4bf2f4 7579 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7580 list_del_rcu(&hook->list);
7581 kfree_rcu(hook, rcu);
7582 }
7583
7584 return err;
3b49e2e9
PNA		 7585}
7586
389a2cbc
PNA		 7587static void nft_flowtable_hooks_destroy(struct list_head *hook_list)
7588{
7589 struct nft_hook *hook, *next;
7590
7591 list_for_each_entry_safe(hook, next, hook_list, list) {
7592 list_del_rcu(&hook->list);
7593 kfree_rcu(hook, rcu);
7594 }
7595}
7596
78d9f48f
PNA		 7597static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
7598 struct nft_flowtable *flowtable)
7599{
7600 const struct nlattr * const *nla = ctx->nla;
7601 struct nft_flowtable_hook flowtable_hook;
7602 struct nft_hook *hook, *next;
7603 struct nft_trans *trans;
7604 bool unregister = false;
7b35582c 7605 u32 flags;
78d9f48f
PNA		 7606 int err;
7607
7608 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7609 &flowtable_hook, flowtable, false);
78d9f48f
PNA		 7610 if (err < 0)
7611 return err;
7612
7613 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7614 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
7615 list_del(&hook->list);
7616 kfree(hook);
7617 }
7618 }
7619
7b35582c
PNA		 7620 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7621 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 7622 if (flags & ~NFT_FLOWTABLE_MASK) {
7623 err = -EOPNOTSUPP;
7624 goto err_flowtable_update_hook;
7625 }
7b35582c 7626 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 7627 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
7628 err = -EOPNOTSUPP;
7629 goto err_flowtable_update_hook;
7630 }
7b35582c
PNA		 7631 } else {
7632 flags = flowtable->data.flags;
7633 }
7634
78d9f48f
PNA		 7635 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
7636 &flowtable_hook.list, flowtable);
7637 if (err < 0)
7638 goto err_flowtable_update_hook;
7639
7640 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
7641 sizeof(struct nft_trans_flowtable));
7642 if (!trans) {
7643 unregister = true;
7644 err = -ENOMEM;
7645 goto err_flowtable_update_hook;
7646 }
7647
7b35582c 7648 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 7649 nft_trans_flowtable(trans) = flowtable;
7650 nft_trans_flowtable_update(trans) = true;
7651 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7652 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
7653
0854db2a 7654 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 7655
7656 return 0;
7657
7658err_flowtable_update_hook:
7659 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7660 if (unregister)
7661 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
7662 list_del_rcu(&hook->list);
7663 kfree_rcu(hook, rcu);
7664 }
7665
7666 return err;
7667
7668}
7669
7dab8ee3
PNA		 7670static int nf_tables_newflowtable(struct sk_buff *skb,
7671 const struct nfnl_info *info,
7672 const struct nlattr * const nla[])
3b49e2e9 7673{
7dab8ee3 7674 struct netlink_ext_ack *extack = info->extack;
d9246a53 7675 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 7676 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7677 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7678 const struct nf_flowtable_type *type;
3f0465a9
PNA		 7679 struct nft_flowtable *flowtable;
7680 struct nft_hook *hook, *next;
7dab8ee3 7681 struct net *net = info->net;
3b49e2e9
PNA		 7682 struct nft_table *table;
7683 struct nft_ctx ctx;
3f0465a9 7684 int err;
3b49e2e9
PNA		 7685
7686 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7687 !nla[NFTA_FLOWTABLE_NAME] ||
7688 !nla[NFTA_FLOWTABLE_HOOK])
7689 return -EINVAL;
7690
cac20fcd 7691 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 7692 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7693 if (IS_ERR(table)) {
7694 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 7695 return PTR_ERR(table);
36dd1bcc 7696 }
3b49e2e9 7697
cac20fcd
PNA		 7698 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
7699 genmask);
3b49e2e9
PNA		 7700 if (IS_ERR(flowtable)) {
7701 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 7702 if (err != -ENOENT) {
7703 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 7704 return err;
36dd1bcc 7705 }
3b49e2e9 7706 } else {
7dab8ee3 7707 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7708 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 7709 return -EEXIST;
36dd1bcc 7710 }
3b49e2e9 7711
7dab8ee3 7712 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 7713
7dab8ee3 7714 return nft_flowtable_update(&ctx, info->nlh, flowtable);
3b49e2e9
PNA		 7715 }
7716
7dab8ee3 7717 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 7718
33758c89 7719 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 7720 if (!flowtable)
7721 return -ENOMEM;
7722
7723 flowtable->table = table;
3ecbfd65 7724 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 7725 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 7726
33758c89 7727 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 7728 if (!flowtable->name) {
7729 err = -ENOMEM;
7730 goto err1;
7731 }
7732
452238e8 7733 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 7734 if (IS_ERR(type)) {
7735 err = PTR_ERR(type);
7736 goto err2;
7737 }
7738
8bb69f3b
PNA		 7739 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7740 flowtable->data.flags =
7741 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 7742 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
7743 err = -EOPNOTSUPP;
8bb69f3b 7744 goto err3;
7e6136f1 7745 }
8bb69f3b
PNA		 7746 }
7747
7748 write_pnet(&flowtable->data.net, net);
3b49e2e9 7749 flowtable->data.type = type;
a268de77 7750 err = type->init(&flowtable->data);
3b49e2e9
PNA		 7751 if (err < 0)
7752 goto err3;
7753
d9246a53 7754 err = nft_flowtable_parse_hook(&ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7755 &flowtable_hook, flowtable, true);
3b49e2e9 7756 if (err < 0)
a268de77 7757 goto err4;
3b49e2e9 7758
d9246a53
PNA		 7759 list_splice(&flowtable_hook.list, &flowtable->hook_list);
7760 flowtable->data.priority = flowtable_hook.priority;
7761 flowtable->hooknum = flowtable_hook.num;
7762
f9382669
PNA		 7763 err = nft_register_flowtable_net_hooks(ctx.net, table,
7764 &flowtable->hook_list,
7765 flowtable);
2d285f26 7766 if (err < 0) {
389a2cbc 7767 nft_flowtable_hooks_destroy(&flowtable->hook_list);
3f0465a9 7768 goto err4;
2d285f26 7769 }
3b49e2e9
PNA		 7770
7771 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
7772 if (err < 0)
3f0465a9 7773 goto err5;
3b49e2e9
PNA		 7774
7775 list_add_tail_rcu(&flowtable->list, &table->flowtables);
7776 table->use++;
7777
7778 return 0;
a268de77 7779err5:
3f0465a9 7780 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 7781 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7782 list_del_rcu(&hook->list);
7783 kfree_rcu(hook, rcu);
7784 }
a268de77
FF		 7785err4:
7786 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 7787err3:
7788 module_put(type->owner);
7789err2:
7790 kfree(flowtable->name);
7791err1:
7792 kfree(flowtable);
7793 return err;
7794}
7795
3003055f
PNA		 7796static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
7797{
7798 struct nft_hook *this, *next;
7799
7800 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
7801 list_del(&this->list);
7802 kfree(this);
7803 }
7804}
7805
abadb2f8
PNA		 7806static int nft_delflowtable_hook(struct nft_ctx *ctx,
7807 struct nft_flowtable *flowtable)
7808{
7809 const struct nlattr * const *nla = ctx->nla;
7810 struct nft_flowtable_hook flowtable_hook;
b6d9014a 7811 LIST_HEAD(flowtable_del_list);
3003055f 7812 struct nft_hook *this, *hook;
abadb2f8
PNA		 7813 struct nft_trans *trans;
7814 int err;
7815
7816 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7817 &flowtable_hook, flowtable, false);
abadb2f8
PNA		 7818 if (err < 0)
7819 return err;
7820
3003055f 7821 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 7822 hook = nft_hook_list_find(&flowtable->hook_list, this);
7823 if (!hook) {
7824 err = -ENOENT;
7825 goto err_flowtable_del_hook;
7826 }
b6d9014a 7827 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 7828 }
7829
7830 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
7831 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 7832 if (!trans) {
7833 err = -ENOMEM;
7834 goto err_flowtable_del_hook;
7835 }
abadb2f8
PNA		 7836
7837 nft_trans_flowtable(trans) = flowtable;
7838 nft_trans_flowtable_update(trans) = true;
7839 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 7840 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 7841 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 7842
0854db2a 7843 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 7844
7845 return 0;
7846
7847err_flowtable_del_hook:
b6d9014a 7848 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 7849 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 7850
7851 return err;
7852}
7853
7dab8ee3
PNA		 7854static int nf_tables_delflowtable(struct sk_buff *skb,
7855 const struct nfnl_info *info,
7856 const struct nlattr * const nla[])
3b49e2e9 7857{
7dab8ee3
PNA		 7858 struct netlink_ext_ack *extack = info->extack;
7859 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7860 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7861 struct nft_flowtable *flowtable;
7dab8ee3 7862 struct net *net = info->net;
36dd1bcc 7863 const struct nlattr *attr;
3b49e2e9
PNA		 7864 struct nft_table *table;
7865 struct nft_ctx ctx;
7866
e603ea4b
PNA		 7867 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7868 (!nla[NFTA_FLOWTABLE_NAME] &&
7869 !nla[NFTA_FLOWTABLE_HANDLE]))
7870 return -EINVAL;
7871
cac20fcd 7872 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 7873 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7874 if (IS_ERR(table)) {
7875 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 7876 return PTR_ERR(table);
36dd1bcc 7877 }
3b49e2e9 7878
36dd1bcc
PNA		 7879 if (nla[NFTA_FLOWTABLE_HANDLE]) {
7880 attr = nla[NFTA_FLOWTABLE_HANDLE];
7881 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
7882 } else {
7883 attr = nla[NFTA_FLOWTABLE_NAME];
7884 flowtable = nft_flowtable_lookup(table, attr, genmask);
7885 }
7886
7887 if (IS_ERR(flowtable)) {
7888 NL_SET_BAD_ATTR(extack, attr);
7889 return PTR_ERR(flowtable);
7890 }
abadb2f8 7891
7dab8ee3 7892 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 7893
7894 if (nla[NFTA_FLOWTABLE_HOOK])
7895 return nft_delflowtable_hook(&ctx, flowtable);
7896
36dd1bcc
PNA		 7897 if (flowtable->use > 0) {
7898 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 7899 return -EBUSY;
36dd1bcc 7900 }
3b49e2e9 7901
3b49e2e9
PNA		 7902 return nft_delflowtable(&ctx, flowtable);
7903}
7904
7905static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
7906 u32 portid, u32 seq, int event,
7907 u32 flags, int family,
c42d8bda
PNA		 7908 struct nft_flowtable *flowtable,
7909 struct list_head *hook_list)
3b49e2e9
PNA		 7910{
7911 struct nlattr *nest, *nest_devs;
3f0465a9 7912 struct nft_hook *hook;
3b49e2e9 7913 struct nlmsghdr *nlh;
3b49e2e9
PNA		 7914
7915 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7916 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7917 NFNETLINK_V0, nft_base_seq(net));
7918 if (!nlh)
3b49e2e9
PNA		 7919 goto nla_put_failure;
7920
3b49e2e9
PNA		 7921 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
7922 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65
HS		 7923 nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
7924 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
8bb69f3b
PNA		 7925 NFTA_FLOWTABLE_PAD) ||
7926 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 7927 goto nla_put_failure;
7928
ae0be8de 7929 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 7930 if (!nest)
7931 goto nla_put_failure;
3b49e2e9 7932 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 7933 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 7934 goto nla_put_failure;
7935
ae0be8de 7936 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 7937 if (!nest_devs)
7938 goto nla_put_failure;
7939
c42d8bda 7940 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 7941 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 7942 goto nla_put_failure;
7943 }
7944 nla_nest_end(skb, nest_devs);
7945 nla_nest_end(skb, nest);
7946
7947 nlmsg_end(skb, nlh);
7948 return 0;
7949
7950nla_put_failure:
7951 nlmsg_trim(skb, nlh);
7952 return -1;
7953}
7954
7955struct nft_flowtable_filter {
7956 char *table;
7957};
7958
7959static int nf_tables_dump_flowtable(struct sk_buff *skb,
7960 struct netlink_callback *cb)
7961{
7962 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
7963 struct nft_flowtable_filter *filter = cb->data;
7964 unsigned int idx = 0, s_idx = cb->args[0];
7965 struct net *net = sock_net(skb->sk);
7966 int family = nfmsg->nfgen_family;
7967 struct nft_flowtable *flowtable;
0854db2a 7968 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 7969 const struct nft_table *table;
7970
7971 rcu_read_lock();
d59d2f82 7972 nft_net = nft_pernet(net);
34002783 7973 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 7974
0854db2a 7975 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7976 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 7977 continue;
7978
36596dad
PNA		 7979 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
7980 if (!nft_is_active(net, flowtable))
7981 goto cont;
7982 if (idx < s_idx)
7983 goto cont;
7984 if (idx > s_idx)
7985 memset(&cb->args[1], 0,
7986 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7987 if (filter && filter->table &&
36596dad
PNA		 7988 strcmp(filter->table, table->name))
7989 goto cont;
3b49e2e9 7990
36596dad
PNA		 7991 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
7992 cb->nlh->nlmsg_seq,
7993 NFT_MSG_NEWFLOWTABLE,
7994 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda
PNA		 7995 table->family,
7996 flowtable,
7997 &flowtable->hook_list) < 0)
36596dad 7998 goto done;
3b49e2e9 7999
36596dad 8000 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 8001cont:
36596dad 8002 idx++;
3b49e2e9
PNA		 8003 }
8004 }
8005done:
8006 rcu_read_unlock();
8007
8008 cb->args[0] = idx;
8009 return skb->len;
8010}
8011
90fd131a 8012static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 8013{
90fd131a
FW		 8014 const struct nlattr * const *nla = cb->data;
8015 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 8016
90fd131a
FW		 8017 if (nla[NFTA_FLOWTABLE_TABLE]) {
8018 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8019 if (!filter)
8020 return -ENOMEM;
3b49e2e9 8021
90fd131a
FW		 8022 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8023 GFP_ATOMIC);
8024 if (!filter->table) {
8025 kfree(filter);
8026 return -ENOMEM;
8027 }
8028 }
3b49e2e9 8029
90fd131a 8030 cb->data = filter;
3b49e2e9
PNA		 8031 return 0;
8032}
8033
90fd131a 8034static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 8035{
90fd131a 8036 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 8037
3b49e2e9 8038 if (!filter)
90fd131a 8039 return 0;
3b49e2e9 8040
90fd131a
FW		 8041 kfree(filter->table);
8042 kfree(filter);
8043
8044 return 0;
3b49e2e9
PNA		 8045}
8046
d9adf22a 8047/* called with rcu_read_lock held */
797d4980
PNA		 8048static int nf_tables_getflowtable(struct sk_buff *skb,
8049 const struct nfnl_info *info,
8050 const struct nlattr * const nla[])
3b49e2e9 8051{
797d4980 8052 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8053 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8054 struct nft_flowtable *flowtable;
3b49e2e9 8055 const struct nft_table *table;
797d4980 8056 struct net *net = info->net;
3b49e2e9
PNA		 8057 struct sk_buff *skb2;
8058 int err;
8059
797d4980 8060 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8061 struct netlink_dump_control c = {
90fd131a 8062 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8063 .dump = nf_tables_dump_flowtable,
8064 .done = nf_tables_dump_flowtable_done,
d9adf22a 8065 .module = THIS_MODULE,
90fd131a 8066 .data = (void *)nla,
3b49e2e9
PNA		 8067 };
8068
797d4980 8069 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8070 }
8071
8072 if (!nla[NFTA_FLOWTABLE_NAME])
8073 return -EINVAL;
8074
cac20fcd 8075 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8076 genmask, 0);
3b49e2e9
PNA		 8077 if (IS_ERR(table))
8078 return PTR_ERR(table);
8079
cac20fcd
PNA		 8080 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8081 genmask);
03a0120f 8082 if (IS_ERR(flowtable))
3b49e2e9
PNA		 8083 return PTR_ERR(flowtable);
8084
d9adf22a 8085 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8086 if (!skb2)
8087 return -ENOMEM;
8088
8089 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8090 info->nlh->nlmsg_seq,
3b49e2e9 8091 NFT_MSG_NEWFLOWTABLE, 0, family,
c42d8bda 8092 flowtable, &flowtable->hook_list);
3b49e2e9 8093 if (err < 0)
ee921183 8094 goto err_fill_flowtable_info;
3b49e2e9 8095
ee921183
PNA		 8096 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8097
8098err_fill_flowtable_info:
3b49e2e9
PNA		 8099 kfree_skb(skb2);
8100 return err;
8101}
8102
8103static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8104 struct nft_flowtable *flowtable,
c42d8bda 8105 struct list_head *hook_list,
3b49e2e9
PNA		 8106 int event)
8107{
d59d2f82 8108 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8109 struct sk_buff *skb;
6fb721cf 8110 u16 flags = 0;
3b49e2e9
PNA		 8111 int err;
8112
dceababa 8113 if (!ctx->report &&
3b49e2e9
PNA		 8114 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8115 return;
8116
8117 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8118 if (skb == NULL)
8119 goto err;
8120
6fb721cf
PNA		 8121 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8122 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8123
3b49e2e9 8124 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8125 ctx->seq, event, flags,
c42d8bda 8126 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8127 if (err < 0) {
8128 kfree_skb(skb);
8129 goto err;
8130 }
8131
0854db2a 8132 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8133 return;
8134err:
8135 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8136}
8137
3b49e2e9
PNA		 8138static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8139{
3f0465a9
PNA		 8140 struct nft_hook *hook, *next;
8141
5acab914 8142 flowtable->data.type->free(&flowtable->data);
3f0465a9 8143 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8144 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8145 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8146 list_del_rcu(&hook->list);
8147 kfree(hook);
8148 }
3b49e2e9 8149 kfree(flowtable->name);
3b49e2e9 8150 module_put(flowtable->data.type->owner);
a12486eb 8151 kfree(flowtable);
3b49e2e9
PNA		 8152}
8153
84d7fce6
PNA		 8154static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8155 u32 portid, u32 seq)
8156{
d59d2f82 8157 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8158 struct nlmsghdr *nlh;
784b4e61 8159 char buf[TASK_COMM_LEN];
dedb67c4 8160 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8161
19c28b13
PNA		 8162 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8163 NFNETLINK_V0, nft_base_seq(net));
8164 if (!nlh)
84d7fce6
PNA		 8165 goto nla_put_failure;
8166
0854db2a 8167 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8168 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8169 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8170 goto nla_put_failure;
8171
053c095a
JB		 8172 nlmsg_end(skb, nlh);
8173 return 0;
84d7fce6
PNA		 8174
8175nla_put_failure:
8176 nlmsg_trim(skb, nlh);
8177 return -EMSGSIZE;
8178}
8179
3b49e2e9
PNA		 8180static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8181 struct nft_flowtable *flowtable)
8182{
3f0465a9 8183 struct nft_hook *hook;
3b49e2e9 8184
3f0465a9
PNA		 8185 list_for_each_entry(hook, &flowtable->hook_list, list) {
8186 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8187 continue;
8188
5acab914 8189 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8190 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8191 list_del_rcu(&hook->list);
8192 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8193 break;
8194 }
8195}
8196
8197static int nf_tables_flowtable_event(struct notifier_block *this,
8198 unsigned long event, void *ptr)
8199{
8200 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8201 struct nft_flowtable *flowtable;
0854db2a 8202 struct nftables_pernet *nft_net;
3b49e2e9 8203 struct nft_table *table;
0a2cf5ee 8204 struct net *net;
3b49e2e9
PNA		 8205
8206 if (event != NETDEV_UNREGISTER)
8207 return 0;
8208
6a48de01 8209 net = dev_net(dev);
d59d2f82 8210 nft_net = nft_pernet(net);
0854db2a
FW		 8211 mutex_lock(&nft_net->commit_mutex);
8212 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8213 list_for_each_entry(flowtable, &table->flowtables, list) {
8214 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8215 }
8216 }
0854db2a 8217 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8218
3b49e2e9
PNA		 8219 return NOTIFY_DONE;
8220}
8221
8222static struct notifier_block nf_tables_flowtable_notifier = {
8223 .notifier_call = nf_tables_flowtable_event,
8224};
8225
25e94a99
PNA		 8226static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8227 int event)
84d7fce6
PNA		 8228{
8229 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8230 struct sk_buff *skb2;
8231 int err;
8232
dceababa 8233 if (!nlmsg_report(nlh) &&
84d7fce6 8234 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8235 return;
84d7fce6 8236
84d7fce6
PNA		 8237 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8238 if (skb2 == NULL)
8239 goto err;
8240
8241 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8242 nlh->nlmsg_seq);
8243 if (err < 0) {
8244 kfree_skb(skb2);
8245 goto err;
8246 }
8247
25e94a99
PNA		 8248 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8249 nlmsg_report(nlh), GFP_KERNEL);
8250 return;
84d7fce6 8251err:
25e94a99
PNA		 8252 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8253 -ENOBUFS);
84d7fce6
PNA		 8254}
8255
797d4980
PNA		 8256static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8257 const struct nlattr * const nla[])
84d7fce6 8258{
84d7fce6
PNA		 8259 struct sk_buff *skb2;
8260 int err;
8261
d9adf22a 8262 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8263 if (skb2 == NULL)
8264 return -ENOMEM;
8265
797d4980
PNA		 8266 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8267 info->nlh->nlmsg_seq);
84d7fce6 8268 if (err < 0)
ee921183 8269 goto err_fill_gen_info;
84d7fce6 8270
797d4980 8271 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8272
8273err_fill_gen_info:
84d7fce6
PNA		 8274 kfree_skb(skb2);
8275 return err;
8276}
8277
96518518
PM		 8278static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8279 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8280 .call = nf_tables_newtable,
8281 .type = NFNL_CB_BATCH,
96518518
PM		 8282 .attr_count = NFTA_TABLE_MAX,
8283 .policy = nft_table_policy,
8284 },
8285 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8286 .call = nf_tables_gettable,
8287 .type = NFNL_CB_RCU,
96518518
PM		 8288 .attr_count = NFTA_TABLE_MAX,
8289 .policy = nft_table_policy,
8290 },
8291 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8292 .call = nf_tables_deltable,
8293 .type = NFNL_CB_BATCH,
96518518
PM		 8294 .attr_count = NFTA_TABLE_MAX,
8295 .policy = nft_table_policy,
8296 },
8297 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8298 .call = nf_tables_newchain,
8299 .type = NFNL_CB_BATCH,
96518518
PM		 8300 .attr_count = NFTA_CHAIN_MAX,
8301 .policy = nft_chain_policy,
8302 },
8303 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8304 .call = nf_tables_getchain,
8305 .type = NFNL_CB_RCU,
96518518
PM		 8306 .attr_count = NFTA_CHAIN_MAX,
8307 .policy = nft_chain_policy,
8308 },
8309 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 8310 .call = nf_tables_delchain,
8311 .type = NFNL_CB_BATCH,
96518518
PM		 8312 .attr_count = NFTA_CHAIN_MAX,
8313 .policy = nft_chain_policy,
8314 },
8315 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 8316 .call = nf_tables_newrule,
8317 .type = NFNL_CB_BATCH,
96518518
PM		 8318 .attr_count = NFTA_RULE_MAX,
8319 .policy = nft_rule_policy,
8320 },
8321 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 8322 .call = nf_tables_getrule,
8323 .type = NFNL_CB_RCU,
96518518
PM		 8324 .attr_count = NFTA_RULE_MAX,
8325 .policy = nft_rule_policy,
8326 },
8daa8fde
PS		 8327 [NFT_MSG_GETRULE_RESET] = {
8328 .call = nf_tables_getrule,
8329 .type = NFNL_CB_RCU,
8330 .attr_count = NFTA_RULE_MAX,
8331 .policy = nft_rule_policy,
8332 },
96518518 8333 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 8334 .call = nf_tables_delrule,
8335 .type = NFNL_CB_BATCH,
96518518
PM		 8336 .attr_count = NFTA_RULE_MAX,
8337 .policy = nft_rule_policy,
8338 },
20a69341 8339 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 8340 .call = nf_tables_newset,
8341 .type = NFNL_CB_BATCH,
20a69341
PM		 8342 .attr_count = NFTA_SET_MAX,
8343 .policy = nft_set_policy,
8344 },
8345 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 8346 .call = nf_tables_getset,
8347 .type = NFNL_CB_RCU,
20a69341
PM		 8348 .attr_count = NFTA_SET_MAX,
8349 .policy = nft_set_policy,
8350 },
8351 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 8352 .call = nf_tables_delset,
8353 .type = NFNL_CB_BATCH,
20a69341
PM		 8354 .attr_count = NFTA_SET_MAX,
8355 .policy = nft_set_policy,
8356 },
8357 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 8358 .call = nf_tables_newsetelem,
8359 .type = NFNL_CB_BATCH,
20a69341
PM		 8360 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8361 .policy = nft_set_elem_list_policy,
8362 },
8363 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 8364 .call = nf_tables_getsetelem,
8365 .type = NFNL_CB_RCU,
20a69341
PM		 8366 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8367 .policy = nft_set_elem_list_policy,
8368 },
8369 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 8370 .call = nf_tables_delsetelem,
8371 .type = NFNL_CB_BATCH,
20a69341
PM		 8372 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8373 .policy = nft_set_elem_list_policy,
8374 },
84d7fce6 8375 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 8376 .call = nf_tables_getgen,
8377 .type = NFNL_CB_RCU,
84d7fce6 8378 },
e5009240 8379 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 8380 .call = nf_tables_newobj,
8381 .type = NFNL_CB_BATCH,
e5009240
PNA		 8382 .attr_count = NFTA_OBJ_MAX,
8383 .policy = nft_obj_policy,
8384 },
8385 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 8386 .call = nf_tables_getobj,
8387 .type = NFNL_CB_RCU,
e5009240
PNA		 8388 .attr_count = NFTA_OBJ_MAX,
8389 .policy = nft_obj_policy,
8390 },
8391 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 8392 .call = nf_tables_delobj,
8393 .type = NFNL_CB_BATCH,
e5009240
PNA		 8394 .attr_count = NFTA_OBJ_MAX,
8395 .policy = nft_obj_policy,
8396 },
43da04a5 8397 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 8398 .call = nf_tables_getobj,
8399 .type = NFNL_CB_RCU,
43da04a5
PNA		 8400 .attr_count = NFTA_OBJ_MAX,
8401 .policy = nft_obj_policy,
8402 },
3b49e2e9 8403 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 8404 .call = nf_tables_newflowtable,
8405 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8406 .attr_count = NFTA_FLOWTABLE_MAX,
8407 .policy = nft_flowtable_policy,
8408 },
8409 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 8410 .call = nf_tables_getflowtable,
8411 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 8412 .attr_count = NFTA_FLOWTABLE_MAX,
8413 .policy = nft_flowtable_policy,
8414 },
8415 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 8416 .call = nf_tables_delflowtable,
8417 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8418 .attr_count = NFTA_FLOWTABLE_MAX,
8419 .policy = nft_flowtable_policy,
8420 },
96518518
PM		 8421};
8422
a654de8f
PNA		 8423static int nf_tables_validate(struct net *net)
8424{
d59d2f82 8425 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 8426 struct nft_table *table;
8427
0854db2a 8428 switch (nft_net->validate_state) {
a654de8f
PNA		 8429 case NFT_VALIDATE_SKIP:
8430 break;
8431 case NFT_VALIDATE_NEED:
8432 nft_validate_state_update(net, NFT_VALIDATE_DO);
954d8297 8433 fallthrough;
a654de8f 8434 case NFT_VALIDATE_DO:
0854db2a 8435 list_for_each_entry(table, &nft_net->tables, list) {
a654de8f
PNA		 8436 if (nft_table_validate(net, table) < 0)
8437 return -EAGAIN;
8438 }
8439 break;
8440 }
8441
8442 return 0;
8443}
8444
66293c46
FW		 8445/* a drop policy has to be deferred until all rules have been activated,
8446 * otherwise a large ruleset that contains a drop-policy base chain will
8447 * cause all packets to get dropped until the full transaction has been
8448 * processed.
8449 *
8450 * We defer the drop policy until the transaction has been finalized.
8451 */
8452static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8453{
8454 struct nft_base_chain *basechain;
8455
8456 if (nft_trans_chain_policy(trans) != NF_DROP)
8457 return;
8458
8459 if (!nft_is_base_chain(trans->ctx.chain))
8460 return;
8461
8462 basechain = nft_base_chain(trans->ctx.chain);
8463 basechain->policy = NF_DROP;
8464}
8465
91c7b38d
PNA		 8466static void nft_chain_commit_update(struct nft_trans *trans)
8467{
8468 struct nft_base_chain *basechain;
8469
1b2470e5
FW		 8470 if (nft_trans_chain_name(trans)) {
8471 rhltable_remove(&trans->ctx.table->chains_ht,
8472 &trans->ctx.chain->rhlhead,
8473 nft_chain_ht_params);
d71efb59 8474 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 8475 rhltable_insert_key(&trans->ctx.table->chains_ht,
8476 trans->ctx.chain->name,
8477 &trans->ctx.chain->rhlhead,
8478 nft_chain_ht_params);
8479 }
91c7b38d 8480
f323d954 8481 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 8482 return;
8483
53315ac6
FW		 8484 nft_chain_stats_replace(trans);
8485
91c7b38d 8486 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 8487
8488 switch (nft_trans_chain_policy(trans)) {
8489 case NF_DROP:
8490 case NF_ACCEPT:
8491 basechain->policy = nft_trans_chain_policy(trans);
8492 break;
8493 }
8494}
8495
d62d0ba9
FFM		 8496static void nft_obj_commit_update(struct nft_trans *trans)
8497{
8498 struct nft_object *newobj;
8499 struct nft_object *obj;
8500
8501 obj = nft_trans_obj(trans);
8502 newobj = nft_trans_obj_newobj(trans);
8503
9fedd894
FFM		 8504 if (obj->ops->update)
8505 obj->ops->update(obj, newobj);
d62d0ba9 8506
dad3bdee 8507 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 8508}
8509
2f99aa31 8510static void nft_commit_release(struct nft_trans *trans)
c7c32e72 8511{
c7c32e72
PNA		 8512 switch (trans->msg_type) {
8513 case NFT_MSG_DELTABLE:
8514 nf_tables_table_destroy(&trans->ctx);
8515 break;
9f8aac0b 8516 case NFT_MSG_NEWCHAIN:
53315ac6 8517 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 8518 kfree(nft_trans_chain_name(trans));
8519 break;
c7c32e72 8520 case NFT_MSG_DELCHAIN:
43a605f2 8521 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 8522 break;
8523 case NFT_MSG_DELRULE:
8524 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8525 break;
8526 case NFT_MSG_DELSET:
0c2a85ed 8527 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 8528 break;
61edafbb 8529 case NFT_MSG_DELSETELEM:
3453c927
PNA		 8530 nf_tables_set_elem_destroy(&trans->ctx,
8531 nft_trans_elem_set(trans),
59105446 8532 nft_trans_elem(trans).priv);
61edafbb 8533 break;
e5009240 8534 case NFT_MSG_DELOBJ:
00bfb320 8535 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 8536 break;
3b49e2e9 8537 case NFT_MSG_DELFLOWTABLE:
abadb2f8
PNA		 8538 if (nft_trans_flowtable_update(trans))
8539 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
8540 else
8541 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 8542 break;
c7c32e72 8543 }
0935d558
FW		 8544
8545 if (trans->put_net)
8546 put_net(trans->ctx.net);
8547
c7c32e72
PNA		 8548 kfree(trans);
8549}
8550
0935d558 8551static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 8552{
8553 struct nft_trans *trans, *next;
0935d558
FW		 8554 LIST_HEAD(head);
8555
8556 spin_lock(&nf_tables_destroy_list_lock);
8557 list_splice_init(&nf_tables_destroy_list, &head);
8558 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 8559
0935d558 8560 if (list_empty(&head))
2f99aa31
FW		 8561 return;
8562
8563 synchronize_rcu();
8564
0935d558 8565 list_for_each_entry_safe(trans, next, &head, list) {
2f99aa31
FW		 8566 list_del(&trans->list);
8567 nft_commit_release(trans);
8568 }
8569}
8570
ffe8923f
FW		 8571void nf_tables_trans_destroy_flush_work(void)
8572{
8573 flush_work(&trans_destroy_work);
8574}
8575EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
8576
ed5f85d4
PNA		 8577static bool nft_expr_reduce(struct nft_regs_track *track,
8578 const struct nft_expr *expr)
8579{
9e539c5b 8580 return false;
ed5f85d4
PNA		 8581}
8582
0cbc06b3
FW		 8583static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
8584{
2c865a8a 8585 const struct nft_expr *expr, *last;
12e4ecfa 8586 struct nft_regs_track track = {};
2c865a8a
PNA		 8587 unsigned int size, data_size;
8588 void *data, *data_boundary;
8589 struct nft_rule_dp *prule;
0cbc06b3 8590 struct nft_rule *rule;
0cbc06b3
FW		 8591
8592 /* already handled or inactive chain? */
2c865a8a 8593 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 8594 return 0;
8595
63045bfd 8596 data_size = 0;
10377d42 8597 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8598 if (nft_is_active_next(net, rule)) {
8599 data_size += sizeof(*prule) + rule->dlen;
8600 if (data_size > INT_MAX)
8601 return -ENOMEM;
8602 }
0cbc06b3 8603 }
2c865a8a 8604 data_size += offsetof(struct nft_rule_dp, data); /* last rule */
0cbc06b3 8605
2c865a8a
PNA		 8606 chain->blob_next = nf_tables_chain_alloc_rules(data_size);
8607 if (!chain->blob_next)
0cbc06b3
FW		 8608 return -ENOMEM;
8609
2c865a8a
PNA		 8610 data = (void *)chain->blob_next->data;
8611 data_boundary = data + data_size;
8612 size = 0;
8613
10377d42 8614 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8615 if (!nft_is_active_next(net, rule))
8616 continue;
8617
8618 prule = (struct nft_rule_dp *)data;
8619 data += offsetof(struct nft_rule_dp, data);
8620 if (WARN_ON_ONCE(data > data_boundary))
8621 return -ENOMEM;
8622
12e4ecfa 8623 size = 0;
fe75e84a 8624 track.last = nft_expr_last(rule);
2c865a8a 8625 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 8626 track.cur = expr;
8627
ed5f85d4 8628 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 8629 expr = track.cur;
8630 continue;
8631 }
8632
2c865a8a
PNA		 8633 if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
8634 return -ENOMEM;
8635
8636 memcpy(data + size, expr, expr->ops->size);
8637 size += expr->ops->size;
8638 }
8639 if (WARN_ON_ONCE(size >= 1 << 12))
8640 return -ENOMEM;
8641
8642 prule->handle = rule->handle;
8643 prule->dlen = size;
8644 prule->is_last = 0;
8645
8646 data += size;
8647 size = 0;
8648 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 8649 }
8650
2c865a8a
PNA		 8651 prule = (struct nft_rule_dp *)data;
8652 data += offsetof(struct nft_rule_dp, data);
8653 if (WARN_ON_ONCE(data > data_boundary))
8654 return -ENOMEM;
8655
8656 nft_last_rule(chain->blob_next, prule);
8657
0cbc06b3
FW		 8658 return 0;
8659}
8660
8661static void nf_tables_commit_chain_prepare_cancel(struct net *net)
8662{
d59d2f82 8663 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 8664 struct nft_trans *trans, *next;
8665
0854db2a 8666 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 8667 struct nft_chain *chain = trans->ctx.chain;
8668
8669 if (trans->msg_type == NFT_MSG_NEWRULE ||
8670 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 8671 kvfree(chain->blob_next);
8672 chain->blob_next = NULL;
0cbc06b3
FW		 8673 }
8674 }
8675}
8676
8677static void __nf_tables_commit_chain_free_rules_old(struct rcu_head *h)
8678{
8679 struct nft_rules_old *o = container_of(h, struct nft_rules_old, h);
8680
2c865a8a 8681 kvfree(o->blob);
0cbc06b3
FW		 8682}
8683
2c865a8a 8684static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 8685{
0cbc06b3
FW		 8686 struct nft_rules_old *old;
8687
2c865a8a
PNA		 8688 /* rcu_head is after end marker */
8689 old = (void *)blob + sizeof(*blob) + blob->size;
8690 old->blob = blob;
0cbc06b3
FW		 8691
8692 call_rcu(&old->h, __nf_tables_commit_chain_free_rules_old);
8693}
8694
0fb39bbe 8695static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 8696{
2c865a8a 8697 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 8698 bool next_genbit;
8699
8700 next_genbit = nft_gencursor_next(net);
8701
2c865a8a 8702 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 8703 lockdep_commit_lock_is_held(net));
2c865a8a 8704 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 8705 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 8706
8707 /* No changes to this chain? */
2c865a8a 8708 if (chain->blob_next == NULL) {
0cbc06b3
FW		 8709 /* chain had no change in last or next generation */
8710 if (g0 == g1)
8711 return;
8712 /*
8713 * chain had no change in this generation; make sure next
8714 * one uses same rules as current generation.
8715 */
8716 if (next_genbit) {
2c865a8a 8717 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 8718 nf_tables_commit_chain_free_rules_old(g1);
8719 } else {
2c865a8a 8720 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 8721 nf_tables_commit_chain_free_rules_old(g0);
8722 }
8723
8724 return;
8725 }
8726
8727 if (next_genbit)
2c865a8a 8728 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 8729 else
2c865a8a 8730 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 8731
2c865a8a 8732 chain->blob_next = NULL;
0cbc06b3
FW		 8733
8734 if (g0 == g1)
8735 return;
8736
8737 if (next_genbit)
8738 nf_tables_commit_chain_free_rules_old(g1);
8739 else
8740 nf_tables_commit_chain_free_rules_old(g0);
8741}
8742
d152159b
FW		 8743static void nft_obj_del(struct nft_object *obj)
8744{
4d44175a 8745 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 8746 list_del_rcu(&obj->list);
8747}
8748
d0e2c7de 8749void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 8750{
8751 struct nft_table *table = chain->table;
8752
8753 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
8754 nft_chain_ht_params));
8755 list_del_rcu(&chain->list);
8756}
8757
eb014de4
PNA		 8758static void nf_tables_module_autoload_cleanup(struct net *net)
8759{
d59d2f82 8760 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 8761 struct nft_module_request *req, *next;
8762
0854db2a
FW		 8763 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
8764 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 8765 WARN_ON_ONCE(!req->done);
8766 list_del(&req->list);
8767 kfree(req);
8768 }
8769}
8770
0935d558
FW		 8771static void nf_tables_commit_release(struct net *net)
8772{
d59d2f82 8773 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 8774 struct nft_trans *trans;
8775
8776 /* all side effects have to be made visible.
8777 * For example, if a chain named 'foo' has been deleted, a
8778 * new transaction must not find it anymore.
8779 *
8780 * Memory reclaim happens asynchronously from work queue
8781 * to prevent expensive synchronize_rcu() in commit phase.
8782 */
0854db2a 8783 if (list_empty(&nft_net->commit_list)) {
eb014de4 8784 nf_tables_module_autoload_cleanup(net);
0854db2a 8785 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 8786 return;
8787 }
8788
0854db2a 8789 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 8790 struct nft_trans, list);
8791 get_net(trans->ctx.net);
8792 WARN_ON_ONCE(trans->put_net);
8793
8794 trans->put_net = true;
8795 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 8796 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 8797 spin_unlock(&nf_tables_destroy_list_lock);
8798
eb014de4 8799 nf_tables_module_autoload_cleanup(net);
0935d558 8800 schedule_work(&trans_destroy_work);
ffe8923f 8801
0854db2a 8802 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 8803}
8804
67cc570e
PNA		 8805static void nft_commit_notify(struct net *net, u32 portid)
8806{
d59d2f82 8807 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 8808 struct sk_buff *batch_skb = NULL, *nskb, *skb;
8809 unsigned char *data;
8810 int len;
8811
0854db2a 8812 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 8813 if (!batch_skb) {
8814new_batch:
8815 batch_skb = skb;
8816 len = NLMSG_GOODSIZE - skb->len;
8817 list_del(&skb->list);
8818 continue;
8819 }
8820 len -= skb->len;
8821 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
8822 data = skb_put(batch_skb, skb->len);
8823 memcpy(data, skb->data, skb->len);
8824 list_del(&skb->list);
8825 kfree_skb(skb);
8826 continue;
8827 }
8828 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8829 NFT_CB(batch_skb).report, GFP_KERNEL);
8830 goto new_batch;
8831 }
8832
8833 if (batch_skb) {
8834 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8835 NFT_CB(batch_skb).report, GFP_KERNEL);
8836 }
8837
0854db2a 8838 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 8839}
8840
c520292f
RGB		 8841static int nf_tables_commit_audit_alloc(struct list_head *adl,
8842 struct nft_table *table)
8843{
8844 struct nft_audit_data *adp;
8845
8846 list_for_each_entry(adp, adl, list) {
8847 if (adp->table == table)
8848 return 0;
8849 }
8850 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
8851 if (!adp)
8852 return -ENOMEM;
8853 adp->table = table;
8854 list_add(&adp->list, adl);
8855 return 0;
8856}
8857
cfbe3650
DM		 8858static void nf_tables_commit_audit_free(struct list_head *adl)
8859{
8860 struct nft_audit_data *adp, *adn;
8861
8862 list_for_each_entry_safe(adp, adn, adl, list) {
8863 list_del(&adp->list);
8864 kfree(adp);
8865 }
8866}
8867
c520292f
RGB		 8868static void nf_tables_commit_audit_collect(struct list_head *adl,
8869 struct nft_table *table, u32 op)
8870{
8871 struct nft_audit_data *adp;
8872
8873 list_for_each_entry(adp, adl, list) {
8874 if (adp->table == table)
8875 goto found;
8876 }
dadf33c9 8877 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 8878 return;
8879found:
8880 adp->entries++;
8881 if (!adp->op || adp->op > op)
8882 adp->op = op;
8883}
8884
8885#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
8886
8887static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
8888{
8889 struct nft_audit_data *adp, *adn;
8890 char aubuf[AUNFTABLENAMELEN];
8891
8892 list_for_each_entry_safe(adp, adn, adl, list) {
8893 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
8894 generation);
8895 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
8896 nft2audit_op[adp->op], GFP_KERNEL);
8897 list_del(&adp->list);
8898 kfree(adp);
8899 }
8900}
8901
5913beaf 8902static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 8903{
d59d2f82 8904 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 8905 struct nft_trans *trans, *next;
a3716e70 8906 struct nft_trans_elem *te;
0cbc06b3
FW		 8907 struct nft_chain *chain;
8908 struct nft_table *table;
34002783 8909 unsigned int base_seq;
c520292f 8910 LIST_HEAD(adl);
c9626a2c 8911 int err;
37082f93 8912
0854db2a
FW		 8913 if (list_empty(&nft_net->commit_list)) {
8914 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 8915 return 0;
8916 }
8917
a654de8f
PNA		 8918 /* 0. Validate ruleset, otherwise roll back for error reporting. */
8919 if (nf_tables_validate(net) < 0)
8920 return -EAGAIN;
8921
c9626a2c
PNA		 8922 err = nft_flow_rule_offload_commit(net);
8923 if (err < 0)
8924 return err;
8925
0cbc06b3 8926 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 8927 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 8928 int ret;
37082f93 8929
c520292f
RGB		 8930 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
8931 if (ret) {
8932 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 8933 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 8934 return ret;
8935 }
0cbc06b3
FW		 8936 if (trans->msg_type == NFT_MSG_NEWRULE ||
8937 trans->msg_type == NFT_MSG_DELRULE) {
8938 chain = trans->ctx.chain;
8939
8940 ret = nf_tables_commit_chain_prepare(net, chain);
8941 if (ret < 0) {
8942 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 8943 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 8944 return ret;
8945 }
8946 }
8947 }
37082f93 8948
0cbc06b3 8949 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 8950 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 8951 list_for_each_entry(chain, &table->chains, list)
8952 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 8953 }
8954
8955 /*
8956 * Bump generation counter, invalidate any dump in progress.
8957 * Cannot fail after this point.
37082f93 8958 */
34002783
PNA		 8959 base_seq = READ_ONCE(nft_net->base_seq);
8960 while (++base_seq == 0)
0854db2a 8961 ;
0cbc06b3 8962
34002783
PNA		 8963 WRITE_ONCE(nft_net->base_seq, base_seq);
8964
0cbc06b3
FW		 8965 /* step 3. Start new generation, rules_gen_X now in use. */
8966 net->nft.gencursor = nft_gencursor_next(net);
37082f93 8967
0854db2a 8968 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 8969 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
8970 trans->msg_type);
b380e5c7 8971 switch (trans->msg_type) {
55dd6f93
PNA		 8972 case NFT_MSG_NEWTABLE:
8973 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 8974 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
8975 nft_trans_destroy(trans);
8976 break;
8977 }
8978 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 8979 nf_tables_table_disable(net, trans->ctx.table);
8980
179d9ba5 8981 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 8982 } else {
f2a6d766 8983 nft_clear(net, trans->ctx.table);
55dd6f93 8984 }
35151d84 8985 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 8986 nft_trans_destroy(trans);
8987 break;
8988 case NFT_MSG_DELTABLE:
f2a6d766 8989 list_del_rcu(&trans->ctx.table->list);
35151d84 8990 nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE);
55dd6f93 8991 break;
91c7b38d 8992 case NFT_MSG_NEWCHAIN:
9f8aac0b 8993 if (nft_trans_chain_update(trans)) {
91c7b38d 8994 nft_chain_commit_update(trans);
9f8aac0b
FW		 8995 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8996 /* trans destroyed after rcu grace period */
8997 } else {
66293c46 8998 nft_chain_commit_drop_policy(trans);
664b0f8c 8999 nft_clear(net, trans->ctx.chain);
9f8aac0b
FW		 9000 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
9001 nft_trans_destroy(trans);
9002 }
91c7b38d
PNA		 9003 break;
9004 case NFT_MSG_DELCHAIN:
1b2470e5 9005 nft_chain_del(trans->ctx.chain);
35151d84 9006 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN);
c974a3a3
PNA		 9007 nf_tables_unregister_hook(trans->ctx.net,
9008 trans->ctx.table,
9009 trans->ctx.chain);
91c7b38d 9010 break;
b380e5c7 9011 case NFT_MSG_NEWRULE:
889f7ee7 9012 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 9013 nf_tables_rule_notify(&trans->ctx,
37082f93 9014 nft_trans_rule(trans),
35151d84 9015 NFT_MSG_NEWRULE);
9dd732e0
PNA		 9016 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9017 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9018
37082f93 9019 nft_trans_destroy(trans);
b380e5c7
PNA		 9020 break;
9021 case NFT_MSG_DELRULE:
9022 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 9023 nf_tables_rule_notify(&trans->ctx,
9024 nft_trans_rule(trans),
9025 NFT_MSG_DELRULE);
f6ac8585
PNA		 9026 nft_rule_expr_deactivate(&trans->ctx,
9027 nft_trans_rule(trans),
9028 NFT_TRANS_COMMIT);
26b5934f
PNA		 9029
9030 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9031 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7 9032 break;
958bee14 9033 case NFT_MSG_NEWSET:
37a9cc52 9034 nft_clear(net, nft_trans_set(trans));
4fefee57
PNA		 9035 /* This avoids hitting -EBUSY when deleting the table
9036 * from the transaction.
9037 */
408070d6 9038 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
4fefee57
PNA		 9039 !list_empty(&nft_trans_set(trans)->bindings))
9040 trans->ctx.table->use--;
9041
958bee14 9042 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 9043 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 9044 nft_trans_destroy(trans);
9045 break;
9046 case NFT_MSG_DELSET:
37a9cc52 9047 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 9048 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 9049 NFT_MSG_DELSET, GFP_KERNEL);
958bee14 9050 break;
60319eb1 9051 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 9052 te = (struct nft_trans_elem *)trans->data;
9053
aaa31047 9054 nft_setelem_activate(net, te->set, &te->elem);
cc02e457
PM		 9055 nf_tables_setelem_notify(&trans->ctx, te->set,
9056 &te->elem,
6fb721cf 9057 NFT_MSG_NEWSETELEM);
60319eb1
PNA		 9058 nft_trans_destroy(trans);
9059 break;
9060 case NFT_MSG_DELSETELEM:
a3716e70 9061 te = (struct nft_trans_elem *)trans->data;
fe2811eb 9062
a3716e70
PNA		 9063 nf_tables_setelem_notify(&trans->ctx, te->set,
9064 &te->elem,
6fb721cf 9065 NFT_MSG_DELSETELEM);
aaa31047
PNA		 9066 nft_setelem_remove(net, te->set, &te->elem);
9067 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9068 atomic_dec(&te->set->nelems);
9069 te->set->ndeact--;
9070 }
60319eb1 9071 break;
e5009240 9072 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 9073 if (nft_trans_obj_update(trans)) {
9074 nft_obj_commit_update(trans);
9075 nf_tables_obj_notify(&trans->ctx,
9076 nft_trans_obj(trans),
9077 NFT_MSG_NEWOBJ);
9078 } else {
9079 nft_clear(net, nft_trans_obj(trans));
9080 nf_tables_obj_notify(&trans->ctx,
9081 nft_trans_obj(trans),
9082 NFT_MSG_NEWOBJ);
9083 nft_trans_destroy(trans);
9084 }
e5009240
PNA		 9085 break;
9086 case NFT_MSG_DELOBJ:
d152159b 9087 nft_obj_del(nft_trans_obj(trans));
e5009240
PNA		 9088 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
9089 NFT_MSG_DELOBJ);
9090 break;
3b49e2e9 9091 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9092 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 9093 nft_trans_flowtable(trans)->data.flags =
9094 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 9095 nf_tables_flowtable_notify(&trans->ctx,
9096 nft_trans_flowtable(trans),
9097 &nft_trans_flowtable_hooks(trans),
9098 NFT_MSG_NEWFLOWTABLE);
9099 list_splice(&nft_trans_flowtable_hooks(trans),
9100 &nft_trans_flowtable(trans)->hook_list);
9101 } else {
9102 nft_clear(net, nft_trans_flowtable(trans));
9103 nf_tables_flowtable_notify(&trans->ctx,
9104 nft_trans_flowtable(trans),
9105 &nft_trans_flowtable(trans)->hook_list,
9106 NFT_MSG_NEWFLOWTABLE);
9107 }
3b49e2e9
PNA		 9108 nft_trans_destroy(trans);
9109 break;
9110 case NFT_MSG_DELFLOWTABLE:
abadb2f8 9111 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 9112 nf_tables_flowtable_notify(&trans->ctx,
9113 nft_trans_flowtable(trans),
9114 &nft_trans_flowtable_hooks(trans),
9115 NFT_MSG_DELFLOWTABLE);
9116 nft_unregister_flowtable_net_hooks(net,
9117 &nft_trans_flowtable_hooks(trans));
9118 } else {
9119 list_del_rcu(&nft_trans_flowtable(trans)->list);
9120 nf_tables_flowtable_notify(&trans->ctx,
9121 nft_trans_flowtable(trans),
9122 &nft_trans_flowtable(trans)->hook_list,
9123 NFT_MSG_DELFLOWTABLE);
9124 nft_unregister_flowtable_net_hooks(net,
9125 &nft_trans_flowtable(trans)->hook_list);
9126 }
3b49e2e9 9127 break;
37082f93 9128 }
37082f93
PNA		 9129 }
9130
67cc570e 9131 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 9132 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 9133 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
0935d558 9134 nf_tables_commit_release(net);
37082f93
PNA		 9135
9136 return 0;
9137}
9138
eb014de4
PNA		 9139static void nf_tables_module_autoload(struct net *net)
9140{
d59d2f82 9141 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9142 struct nft_module_request *req, *next;
9143 LIST_HEAD(module_list);
9144
0854db2a
FW		 9145 list_splice_init(&nft_net->module_list, &module_list);
9146 mutex_unlock(&nft_net->commit_mutex);
eb014de4 9147 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 9148 request_module("%s", req->module);
9149 req->done = true;
eb014de4 9150 }
0854db2a
FW		 9151 mutex_lock(&nft_net->commit_mutex);
9152 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 9153}
9154
b326dd37 9155static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 9156{
c7c32e72
PNA		 9157 switch (trans->msg_type) {
9158 case NFT_MSG_NEWTABLE:
9159 nf_tables_table_destroy(&trans->ctx);
9160 break;
9161 case NFT_MSG_NEWCHAIN:
43a605f2 9162 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9163 break;
9164 case NFT_MSG_NEWRULE:
9165 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9166 break;
9167 case NFT_MSG_NEWSET:
0c2a85ed 9168 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9169 break;
61edafbb
PM		 9170 case NFT_MSG_NEWSETELEM:
9171 nft_set_elem_destroy(nft_trans_elem_set(trans),
61f9e292 9172 nft_trans_elem(trans).priv, true);
61edafbb 9173 break;
e5009240 9174 case NFT_MSG_NEWOBJ:
00bfb320 9175 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9176 break;
3b49e2e9 9177 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9178 if (nft_trans_flowtable_update(trans))
9179 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
9180 else
9181 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9182 break;
c7c32e72
PNA		 9183 }
9184 kfree(trans);
9185}
9186
c0391b6a 9187static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 9188{
d59d2f82 9189 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9190 struct nft_trans *trans, *next;
02263db0 9191 struct nft_trans_elem *te;
37082f93 9192
c0391b6a
PNA		 9193 if (action == NFNL_ABORT_VALIDATE &&
9194 nf_tables_validate(net) < 0)
9195 return -EAGAIN;
9196
0854db2a 9197 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 9198 list) {
b380e5c7 9199 switch (trans->msg_type) {
55dd6f93
PNA		 9200 case NFT_MSG_NEWTABLE:
9201 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9202 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9203 nft_trans_destroy(trans);
9204 break;
9205 }
9206 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 9207 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 9208 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
9209 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
9210 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
9211 }
9212 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 9213 nft_trans_destroy(trans);
9214 } else {
e688a7f8 9215 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 9216 }
9217 break;
9218 case NFT_MSG_DELTABLE:
f2a6d766 9219 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 9220 nft_trans_destroy(trans);
9221 break;
91c7b38d
PNA		 9222 case NFT_MSG_NEWCHAIN:
9223 if (nft_trans_chain_update(trans)) {
982f4051 9224 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 9225 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 9226 nft_trans_destroy(trans);
9227 } else {
d0e2c7de
PNA		 9228 if (nft_chain_is_bound(trans->ctx.chain)) {
9229 nft_trans_destroy(trans);
9230 break;
9231 }
4fefee57 9232 trans->ctx.table->use--;
1b2470e5 9233 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 9234 nf_tables_unregister_hook(trans->ctx.net,
9235 trans->ctx.table,
9236 trans->ctx.chain);
91c7b38d
PNA		 9237 }
9238 break;
9239 case NFT_MSG_DELCHAIN:
4fefee57 9240 trans->ctx.table->use++;
664b0f8c 9241 nft_clear(trans->ctx.net, trans->ctx.chain);
91c7b38d
PNA		 9242 nft_trans_destroy(trans);
9243 break;
b380e5c7 9244 case NFT_MSG_NEWRULE:
4fefee57 9245 trans->ctx.chain->use--;
b380e5c7 9246 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 9247 nft_rule_expr_deactivate(&trans->ctx,
9248 nft_trans_rule(trans),
9249 NFT_TRANS_ABORT);
3c5e4462
PNA		 9250 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9251 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 9252 break;
9253 case NFT_MSG_DELRULE:
4fefee57 9254 trans->ctx.chain->use++;
889f7ee7 9255 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 9256 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 9257 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9258 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9259
37082f93 9260 nft_trans_destroy(trans);
b380e5c7 9261 break;
958bee14 9262 case NFT_MSG_NEWSET:
4fefee57 9263 trans->ctx.table->use--;
6a0a8d10 9264 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 9265 nft_trans_destroy(trans);
9266 break;
9267 }
9268 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 9269 break;
9270 case NFT_MSG_DELSET:
4fefee57 9271 trans->ctx.table->use++;
37a9cc52 9272 nft_clear(trans->ctx.net, nft_trans_set(trans));
958bee14
PNA		 9273 nft_trans_destroy(trans);
9274 break;
60319eb1 9275 case NFT_MSG_NEWSETELEM:
6a0a8d10 9276 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 9277 nft_trans_destroy(trans);
9278 break;
9279 }
02263db0 9280 te = (struct nft_trans_elem *)trans->data;
aaa31047
PNA		 9281 nft_setelem_remove(net, te->set, &te->elem);
9282 if (!nft_setelem_is_catchall(te->set, &te->elem))
9283 atomic_dec(&te->set->nelems);
60319eb1
PNA		 9284 break;
9285 case NFT_MSG_DELSETELEM:
cc02e457
PM		 9286 te = (struct nft_trans_elem *)trans->data;
9287
f8bb7889 9288 nft_setelem_data_activate(net, te->set, &te->elem);
aaa31047
PNA		 9289 nft_setelem_activate(net, te->set, &te->elem);
9290 if (!nft_setelem_is_catchall(te->set, &te->elem))
9291 te->set->ndeact--;
cc02e457 9292
e5009240
PNA		 9293 nft_trans_destroy(trans);
9294 break;
9295 case NFT_MSG_NEWOBJ:
d62d0ba9 9296 if (nft_trans_obj_update(trans)) {
dad3bdee 9297 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 9298 nft_trans_destroy(trans);
9299 } else {
9300 trans->ctx.table->use--;
9301 nft_obj_del(nft_trans_obj(trans));
9302 }
e5009240
PNA		 9303 break;
9304 case NFT_MSG_DELOBJ:
9305 trans->ctx.table->use++;
9306 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 9307 nft_trans_destroy(trans);
9308 break;
3b49e2e9 9309 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9310 if (nft_trans_flowtable_update(trans)) {
9311 nft_unregister_flowtable_net_hooks(net,
9312 &nft_trans_flowtable_hooks(trans));
9313 } else {
9314 trans->ctx.table->use--;
9315 list_del_rcu(&nft_trans_flowtable(trans)->list);
9316 nft_unregister_flowtable_net_hooks(net,
9317 &nft_trans_flowtable(trans)->hook_list);
9318 }
3b49e2e9
PNA		 9319 break;
9320 case NFT_MSG_DELFLOWTABLE:
abadb2f8 9321 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 9322 list_splice(&nft_trans_flowtable_hooks(trans),
9323 &nft_trans_flowtable(trans)->hook_list);
abadb2f8
PNA		 9324 } else {
9325 trans->ctx.table->use++;
9326 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9327 }
3b49e2e9
PNA		 9328 nft_trans_destroy(trans);
9329 break;
37082f93 9330 }
37082f93
PNA		 9331 }
9332
b326dd37
PNA		 9333 synchronize_rcu();
9334
a1cee076 9335 list_for_each_entry_safe_reverse(trans, next,
0854db2a 9336 &nft_net->commit_list, list) {
c7c32e72 9337 list_del(&trans->list);
b326dd37 9338 nf_tables_abort_release(trans);
37082f93
PNA		 9339 }
9340
c0391b6a 9341 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 9342 nf_tables_module_autoload(net);
9343 else
9344 nf_tables_module_autoload_cleanup(net);
9345
37082f93
PNA		 9346 return 0;
9347}
9348
a654de8f
PNA		 9349static void nf_tables_cleanup(struct net *net)
9350{
9351 nft_validate_state_update(net, NFT_VALIDATE_SKIP);
9352}
9353
c0391b6a
PNA		 9354static int nf_tables_abort(struct net *net, struct sk_buff *skb,
9355 enum nfnl_abort_action action)
71ad00c5 9356{
d59d2f82 9357 struct nftables_pernet *nft_net = nft_pernet(net);
c0391b6a 9358 int ret = __nf_tables_abort(net, action);
f102d66b 9359
0854db2a 9360 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9361
9362 return ret;
71ad00c5
FW		 9363}
9364
74e8bcd2
PNA		 9365static bool nf_tables_valid_genid(struct net *net, u32 genid)
9366{
d59d2f82 9367 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 9368 bool genid_ok;
9369
0854db2a 9370 mutex_lock(&nft_net->commit_mutex);
f102d66b 9371
0854db2a 9372 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 9373 if (!genid_ok)
0854db2a 9374 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9375
9376 /* else, commit mutex has to be released by commit or abort function */
9377 return genid_ok;
74e8bcd2
PNA		 9378}
9379
96518518
PM		 9380static const struct nfnetlink_subsystem nf_tables_subsys = {
9381 .name = "nf_tables",
9382 .subsys_id = NFNL_SUBSYS_NFTABLES,
9383 .cb_count = NFT_MSG_MAX,
9384 .cb = nf_tables_cb,
0628b123
PNA		 9385 .commit = nf_tables_commit,
9386 .abort = nf_tables_abort,
a654de8f 9387 .cleanup = nf_tables_cleanup,
74e8bcd2 9388 .valid_genid = nf_tables_valid_genid,
be2ab5b4 9389 .owner = THIS_MODULE,
96518518
PM		 9390};
9391
7210e4e3 9392int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 9393 enum nft_chain_types type)
7210e4e3
PNA		 9394{
9395 const struct nft_base_chain *basechain;
9396
f323d954 9397 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 9398 basechain = nft_base_chain(chain);
9399 if (basechain->type->type != type)
9400 return -EOPNOTSUPP;
9401 }
9402 return 0;
9403}
9404EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
9405
75e8d06d
PNA		 9406int nft_chain_validate_hooks(const struct nft_chain *chain,
9407 unsigned int hook_flags)
9408{
9409 struct nft_base_chain *basechain;
9410
f323d954 9411 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 9412 basechain = nft_base_chain(chain);
9413
c974a3a3 9414 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 9415 return 0;
9416
9417 return -EOPNOTSUPP;
9418 }
9419
9420 return 0;
9421}
9422EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
9423
20a69341
PM		 9424/*
9425 * Loop detection - walk through the ruleset beginning at the destination chain
9426 * of a new jump until either the source chain is reached (loop) or all
9427 * reachable chains have been traversed.
9428 *
9429 * The loop check is performed whenever a new jump verdict is added to an
9430 * expression or verdict map or a verdict map is bound to a new chain.
9431 */
9432
9433static int nf_tables_check_loops(const struct nft_ctx *ctx,
9434 const struct nft_chain *chain);
9435
6387aa6e
PNA		 9436static int nft_check_loops(const struct nft_ctx *ctx,
9437 const struct nft_set_ext *ext)
9438{
9439 const struct nft_data *data;
9440 int ret;
9441
9442 data = nft_set_ext_data(ext);
9443 switch (data->verdict.code) {
9444 case NFT_JUMP:
9445 case NFT_GOTO:
9446 ret = nf_tables_check_loops(ctx, data->verdict.chain);
9447 break;
9448 default:
9449 ret = 0;
9450 break;
9451 }
9452
9453 return ret;
9454}
9455
20a69341 9456static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 9457 struct nft_set *set,
20a69341 9458 const struct nft_set_iter *iter,
de70185d 9459 struct nft_set_elem *elem)
20a69341 9460{
fe2811eb 9461 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
fe2811eb
PM		 9462
9463 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
9464 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 9465 return 0;
9466
6387aa6e 9467 return nft_check_loops(ctx, ext);
20a69341
PM		 9468}
9469
aaa31047
PNA		 9470static int nft_set_catchall_loops(const struct nft_ctx *ctx,
9471 struct nft_set *set)
9472{
9473 u8 genmask = nft_genmask_next(ctx->net);
9474 struct nft_set_elem_catchall *catchall;
9475 struct nft_set_ext *ext;
9476 int ret = 0;
9477
9478 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9479 ext = nft_set_elem_ext(set, catchall->elem);
9480 if (!nft_set_elem_active(ext, genmask))
9481 continue;
9482
9483 ret = nft_check_loops(ctx, ext);
9484 if (ret < 0)
9485 return ret;
9486 }
9487
9488 return ret;
9489}
9490
20a69341
PM		 9491static int nf_tables_check_loops(const struct nft_ctx *ctx,
9492 const struct nft_chain *chain)
9493{
9494 const struct nft_rule *rule;
9495 const struct nft_expr *expr, *last;
de70185d 9496 struct nft_set *set;
20a69341
PM		 9497 struct nft_set_binding *binding;
9498 struct nft_set_iter iter;
20a69341
PM		 9499
9500 if (ctx->chain == chain)
9501 return -ELOOP;
9502
9503 list_for_each_entry(rule, &chain->rules, list) {
9504 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 9505 struct nft_immediate_expr *priv;
9506 const struct nft_data *data;
0ca743a5
PNA		 9507 int err;
9508
a654de8f 9509 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 9510 continue;
9511
a654de8f
PNA		 9512 priv = nft_expr_priv(expr);
9513 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 9514 continue;
20a69341 9515
a654de8f 9516 data = &priv->data;
1ca2e170 9517 switch (data->verdict.code) {
20a69341
PM		 9518 case NFT_JUMP:
9519 case NFT_GOTO:
1ca2e170
PM		 9520 err = nf_tables_check_loops(ctx,
9521 data->verdict.chain);
20a69341
PM		 9522 if (err < 0)
9523 return err;
c2168e6b 9524 break;
20a69341
PM		 9525 default:
9526 break;
9527 }
9528 }
9529 }
9530
9531 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 9532 if (!nft_is_active_next(ctx->net, set))
9533 continue;
20a69341
PM		 9534 if (!(set->flags & NFT_SET_MAP) ||
9535 set->dtype != NFT_DATA_VERDICT)
9536 continue;
9537
9538 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 9539 if (!(binding->flags & NFT_SET_MAP) ||
9540 binding->chain != chain)
20a69341
PM		 9541 continue;
9542
8588ac09 9543 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 9544 iter.skip = 0;
9545 iter.count = 0;
9546 iter.err = 0;
9547 iter.fn = nf_tables_loop_check_setelem;
9548
9549 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 9550 if (!iter.err)
9551 iter.err = nft_set_catchall_loops(ctx, set);
9552
20a69341
PM		 9553 if (iter.err < 0)
9554 return iter.err;
9555 }
9556 }
9557
9558 return 0;
9559}
9560
36b701fa
LGL		 9561/**
9562 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
9563 *
9564 * @attr: netlink attribute to fetch value from
9565 * @max: maximum value to be stored in dest
9566 * @dest: pointer to the variable
9567 *
9568 * Parse, check and store a given u32 netlink attribute into variable.
9569 * This function returns -ERANGE if the value goes over maximum value.
9570 * Otherwise a 0 is returned and the attribute value is stored in the
9571 * destination variable.
9572 */
f1d505bb 9573int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 9574{
09525a09 9575 u32 val;
36b701fa
LGL		 9576
9577 val = ntohl(nla_get_be32(attr));
9578 if (val > max)
9579 return -ERANGE;
9580
9581 *dest = val;
9582 return 0;
9583}
9584EXPORT_SYMBOL_GPL(nft_parse_u32_check);
9585
6c6f9f31 9586static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 9587{
49499c3e
PM		 9588 unsigned int reg;
9589
9590 reg = ntohl(nla_get_be32(attr));
9591 switch (reg) {
9592 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 9593 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
9594 break;
9595 case NFT_REG32_00...NFT_REG32_15:
9596 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
9597 break;
49499c3e 9598 default:
6e1acfa3 9599 return -ERANGE;
49499c3e 9600 }
6e1acfa3
PNA		 9601
9602 return 0;
b1c96ed3 9603}
b1c96ed3 9604
49499c3e
PM		 9605/**
9606 * nft_dump_register - dump a register value to a netlink attribute
9607 *
9608 * @skb: socket buffer
9609 * @attr: attribute number
9610 * @reg: register number
9611 *
9612 * Construct a netlink attribute containing the register number. For
9613 * compatibility reasons, register numbers being a multiple of 4 are
9614 * translated to the corresponding 128 bit register numbers.
9615 */
b1c96ed3
PM		 9616int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
9617{
49499c3e
PM		 9618 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
9619 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
9620 else
9621 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
9622
b1c96ed3
PM		 9623 return nla_put_be32(skb, attr, htonl(reg));
9624}
9625EXPORT_SYMBOL_GPL(nft_dump_register);
9626
4f16d25c 9627static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 9628{
49499c3e 9629 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 9630 return -EINVAL;
d07db988
PM		 9631 if (len == 0)
9632 return -EINVAL;
c593642c 9633 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 9634 return -ERANGE;
49499c3e 9635
96518518
PM		 9636 return 0;
9637}
4f16d25c
PNA		 9638
9639int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
9640{
9641 u32 reg;
9642 int err;
9643
6e1acfa3
PNA		 9644 err = nft_parse_register(attr, &reg);
9645 if (err < 0)
9646 return err;
9647
4f16d25c
PNA		 9648 err = nft_validate_register_load(reg, len);
9649 if (err < 0)
9650 return err;
9651
9652 *sreg = reg;
9653 return 0;
9654}
9655EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 9656
345023b0
PNA		 9657static int nft_validate_register_store(const struct nft_ctx *ctx,
9658 enum nft_registers reg,
9659 const struct nft_data *data,
9660 enum nft_data_types type,
9661 unsigned int len)
96518518 9662{
20a69341
PM		 9663 int err;
9664
96518518
PM		 9665 switch (reg) {
9666 case NFT_REG_VERDICT:
58f40ab6 9667 if (type != NFT_DATA_VERDICT)
96518518 9668 return -EINVAL;
20a69341 9669
58f40ab6 9670 if (data != NULL &&
1ca2e170
PM		 9671 (data->verdict.code == NFT_GOTO ||
9672 data->verdict.code == NFT_JUMP)) {
9673 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 9674 if (err < 0)
9675 return err;
20a69341
PM		 9676 }
9677
96518518
PM		 9678 return 0;
9679 default:
49499c3e 9680 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 9681 return -EINVAL;
45d9bcda
PM		 9682 if (len == 0)
9683 return -EINVAL;
49499c3e 9684 if (reg * NFT_REG32_SIZE + len >
c593642c 9685 sizeof_field(struct nft_regs, data))
45d9bcda 9686 return -ERANGE;
27e6d201 9687
96518518
PM		 9688 if (data != NULL && type != NFT_DATA_VALUE)
9689 return -EINVAL;
9690 return 0;
9691 }
9692}
345023b0
PNA		 9693
9694int nft_parse_register_store(const struct nft_ctx *ctx,
9695 const struct nlattr *attr, u8 *dreg,
9696 const struct nft_data *data,
9697 enum nft_data_types type, unsigned int len)
9698{
9699 int err;
9700 u32 reg;
9701
6e1acfa3
PNA		 9702 err = nft_parse_register(attr, &reg);
9703 if (err < 0)
9704 return err;
9705
345023b0
PNA		 9706 err = nft_validate_register_store(ctx, reg, data, type, len);
9707 if (err < 0)
9708 return err;
9709
9710 *dreg = reg;
9711 return 0;
9712}
9713EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 9714
9715static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
9716 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
9717 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
9718 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 9719 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 9720};
9721
9722static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
9723 struct nft_data_desc *desc, const struct nlattr *nla)
9724{
664b0f8c 9725 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 9726 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
9727 struct nft_chain *chain;
9728 int err;
9729
8cb08174
JB		 9730 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
9731 nft_verdict_policy, NULL);
96518518
PM		 9732 if (err < 0)
9733 return err;
9734
9735 if (!tb[NFTA_VERDICT_CODE])
9736 return -EINVAL;
1ca2e170 9737 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 9738
1ca2e170 9739 switch (data->verdict.code) {
e0abdadc 9740 default:
1ca2e170 9741 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 9742 case NF_ACCEPT:
9743 case NF_DROP:
9744 case NF_QUEUE:
9745 break;
9746 default:
9747 return -EINVAL;
9748 }
954d8297 9749 fallthrough;
96518518
PM		 9750 case NFT_CONTINUE:
9751 case NFT_BREAK:
9752 case NFT_RETURN:
96518518
PM		 9753 break;
9754 case NFT_JUMP:
9755 case NFT_GOTO:
51d70f18
PNA		 9756 if (tb[NFTA_VERDICT_CHAIN]) {
9757 chain = nft_chain_lookup(ctx->net, ctx->table,
9758 tb[NFTA_VERDICT_CHAIN],
9759 genmask);
9760 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 9761 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
51d70f18
PNA		 9762 tb[NFTA_VERDICT_CHAIN_ID]);
9763 if (IS_ERR(chain))
9764 return PTR_ERR(chain);
9765 } else {
96518518 9766 return -EINVAL;
51d70f18
PNA		 9767 }
9768
96518518
PM		 9769 if (IS_ERR(chain))
9770 return PTR_ERR(chain);
f323d954 9771 if (nft_is_base_chain(chain))
96518518 9772 return -EOPNOTSUPP;
e02f0d39
PNA		 9773 if (nft_chain_is_bound(chain))
9774 return -EINVAL;
f323ef3a
PNA		 9775 if (desc->flags & NFT_DATA_DESC_SETELEM &&
9776 chain->flags & NFT_CHAIN_BINDING)
9777 return -EINVAL;
96518518 9778
96518518 9779 chain->use++;
1ca2e170 9780 data->verdict.chain = chain;
96518518 9781 break;
96518518
PM		 9782 }
9783
4c4ed074 9784 desc->len = sizeof(data->verdict);
341b6941 9785
96518518
PM		 9786 return 0;
9787}
9788
9789static void nft_verdict_uninit(const struct nft_data *data)
9790{
d0e2c7de
PNA		 9791 struct nft_chain *chain;
9792 struct nft_rule *rule;
9793
1ca2e170 9794 switch (data->verdict.code) {
96518518
PM		 9795 case NFT_JUMP:
9796 case NFT_GOTO:
d0e2c7de
PNA		 9797 chain = data->verdict.chain;
9798 chain->use--;
9799
9800 if (!nft_chain_is_bound(chain))
9801 break;
9802
9803 chain->table->use--;
9804 list_for_each_entry(rule, &chain->rules, list)
9805 chain->use--;
9806
9807 nft_chain_del(chain);
96518518
PM		 9808 break;
9809 }
9810}
9811
33d5a7b1 9812int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 9813{
9814 struct nlattr *nest;
9815
ae0be8de 9816 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 9817 if (!nest)
9818 goto nla_put_failure;
9819
33d5a7b1 9820 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 9821 goto nla_put_failure;
9822
33d5a7b1 9823 switch (v->code) {
96518518
PM		 9824 case NFT_JUMP:
9825 case NFT_GOTO:
1ca2e170 9826 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 9827 v->chain->name))
96518518
PM		 9828 goto nla_put_failure;
9829 }
9830 nla_nest_end(skb, nest);
9831 return 0;
9832
9833nla_put_failure:
9834 return -1;
9835}
9836
d0a11fc3 9837static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 9838 struct nft_data *data, struct nft_data_desc *desc,
9839 const struct nlattr *nla)
96518518
PM		 9840{
9841 unsigned int len;
9842
9843 len = nla_len(nla);
9844 if (len == 0)
9845 return -EINVAL;
341b6941 9846 if (len > desc->size)
96518518 9847 return -EOVERFLOW;
341b6941
PNA		 9848 if (desc->len) {
9849 if (len != desc->len)
9850 return -EINVAL;
9851 } else {
9852 desc->len = len;
9853 }
96518518 9854
d0a11fc3 9855 nla_memcpy(data->data, nla, len);
341b6941 9856
96518518
PM		 9857 return 0;
9858}
9859
9860static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
9861 unsigned int len)
9862{
9863 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
9864}
9865
9866static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 9867 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 9868 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
9869};
9870
9871/**
9872 * nft_data_init - parse nf_tables data netlink attributes
9873 *
9874 * @ctx: context of the expression using the data
9875 * @data: destination struct nft_data
9876 * @desc: data description
9877 * @nla: netlink attribute containing data
9878 *
9879 * Parse the netlink data attributes and initialize a struct nft_data.
9880 * The type and length of data are returned in the data description.
9881 *
9882 * The caller can indicate that it only wants to accept data of type
9883 * NFT_DATA_VALUE by passing NULL for the ctx argument.
9884 */
341b6941 9885int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 9886 struct nft_data_desc *desc, const struct nlattr *nla)
9887{
9888 struct nlattr *tb[NFTA_DATA_MAX + 1];
9889 int err;
9890
341b6941
PNA		 9891 if (WARN_ON_ONCE(!desc->size))
9892 return -EINVAL;
9893
8cb08174
JB		 9894 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
9895 nft_data_policy, NULL);
96518518
PM		 9896 if (err < 0)
9897 return err;
9898
341b6941
PNA		 9899 if (tb[NFTA_DATA_VALUE]) {
9900 if (desc->type != NFT_DATA_VALUE)
9901 return -EINVAL;
9902
9903 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
9904 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
9905 if (desc->type != NFT_DATA_VERDICT)
9906 return -EINVAL;
9907
9908 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
9909 } else {
9910 err = -EINVAL;
9911 }
9912
9913 return err;
96518518
PM		 9914}
9915EXPORT_SYMBOL_GPL(nft_data_init);
9916
9917/**
59105446 9918 * nft_data_release - release a nft_data item
96518518
PM		 9919 *
9920 * @data: struct nft_data to release
9921 * @type: type of data
9922 *
9923 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
9924 * all others need to be released by calling this function.
9925 */
59105446 9926void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 9927{
960bd2c2 9928 if (type < NFT_DATA_VERDICT)
96518518 9929 return;
960bd2c2 9930 switch (type) {
96518518
PM		 9931 case NFT_DATA_VERDICT:
9932 return nft_verdict_uninit(data);
9933 default:
9934 WARN_ON(1);
9935 }
9936}
59105446 9937EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 9938
9939int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
9940 enum nft_data_types type, unsigned int len)
9941{
9942 struct nlattr *nest;
9943 int err;
9944
ae0be8de 9945 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 9946 if (nest == NULL)
9947 return -1;
9948
9949 switch (type) {
9950 case NFT_DATA_VALUE:
9951 err = nft_value_dump(skb, data, len);
9952 break;
9953 case NFT_DATA_VERDICT:
33d5a7b1 9954 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 9955 break;
9956 default:
9957 err = -EINVAL;
9958 WARN_ON(1);
9959 }
9960
9961 nla_nest_end(skb, nest);
9962 return err;
9963}
9964EXPORT_SYMBOL_GPL(nft_data_dump);
9965
5ebe0b0e
PNA		 9966int __nft_release_basechain(struct nft_ctx *ctx)
9967{
9968 struct nft_rule *rule, *nr;
9969
fa5950e4
FW		 9970 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
9971 return 0;
5ebe0b0e 9972
c974a3a3 9973 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 9974 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
9975 list_del(&rule->list);
9976 ctx->chain->use--;
bb7b40ae 9977 nf_tables_rule_release(ctx, rule);
5ebe0b0e 9978 }
1b2470e5 9979 nft_chain_del(ctx->chain);
5ebe0b0e 9980 ctx->table->use--;
43a605f2 9981 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 9982
9983 return 0;
9984}
9985EXPORT_SYMBOL_GPL(__nft_release_basechain);
9986
00dfe9be
PNA		 9987static void __nft_release_hook(struct net *net, struct nft_table *table)
9988{
6069da44 9989 struct nft_flowtable *flowtable;
00dfe9be
PNA		 9990 struct nft_chain *chain;
9991
9992 list_for_each_entry(chain, &table->chains, list)
f9a43007 9993 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 9994 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 9995 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
9996 true);
00dfe9be
PNA		 9997}
9998
767d1216
PNA		 9999static void __nft_release_hooks(struct net *net)
10000{
d59d2f82 10001 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 10002 struct nft_table *table;
767d1216 10003
0854db2a 10004 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 10005 if (nft_table_has_owner(table))
10006 continue;
10007
00dfe9be 10008 __nft_release_hook(net, table);
2888b080 10009 }
767d1216
PNA		 10010}
10011
fd020332 10012static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 10013{
3b49e2e9 10014 struct nft_flowtable *flowtable, *nf;
df05ef87 10015 struct nft_chain *chain, *nc;
e5009240 10016 struct nft_object *obj, *ne;
df05ef87
PNA		 10017 struct nft_rule *rule, *nr;
10018 struct nft_set *set, *ns;
10019 struct nft_ctx ctx = {
10020 .net = net,
43a605f2 10021 .family = NFPROTO_NETDEV,
df05ef87
PNA		 10022 };
10023
fd020332
PNA		 10024 ctx.family = table->family;
10025 ctx.table = table;
10026 list_for_each_entry(chain, &table->chains, list) {
10027 ctx.chain = chain;
10028 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
10029 list_del(&rule->list);
10030 chain->use--;
10031 nf_tables_rule_release(&ctx, rule);
df05ef87 10032 }
df05ef87 10033 }
fd020332
PNA		 10034 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
10035 list_del(&flowtable->list);
10036 table->use--;
10037 nf_tables_flowtable_destroy(flowtable);
10038 }
10039 list_for_each_entry_safe(set, ns, &table->sets, list) {
10040 list_del(&set->list);
10041 table->use--;
10042 nft_set_destroy(&ctx, set);
10043 }
10044 list_for_each_entry_safe(obj, ne, &table->objects, list) {
10045 nft_obj_del(obj);
10046 table->use--;
10047 nft_obj_destroy(&ctx, obj);
10048 }
10049 list_for_each_entry_safe(chain, nc, &table->chains, list) {
10050 ctx.chain = chain;
10051 nft_chain_del(chain);
10052 table->use--;
10053 nf_tables_chain_destroy(&ctx);
10054 }
fd020332
PNA		 10055 nf_tables_table_destroy(&ctx);
10056}
10057
bd1777b3 10058static void __nft_release_tables(struct net *net)
fd020332 10059{
d59d2f82 10060 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 10061 struct nft_table *table, *nt;
10062
0854db2a 10063 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 10064 if (nft_table_has_owner(table))
6001a930
PNA		 10065 continue;
10066
a499b03b
FW		 10067 list_del(&table->list);
10068
fd020332 10069 __nft_release_table(net, table);
6001a930
PNA		 10070 }
10071}
10072
10073static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
10074 void *ptr)
10075{
a499b03b 10076 struct nft_table *table, *to_delete[8];
0854db2a 10077 struct nftables_pernet *nft_net;
6001a930 10078 struct netlink_notify *n = ptr;
6001a930 10079 struct net *net = n->net;
a499b03b
FW		 10080 unsigned int deleted;
10081 bool restart = false;
6001a930
PNA		 10082
10083 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
10084 return NOTIFY_DONE;
10085
d59d2f82 10086 nft_net = nft_pernet(net);
a499b03b 10087 deleted = 0;
0854db2a 10088 mutex_lock(&nft_net->commit_mutex);
d4bc8271
PNA		 10089 if (!list_empty(&nf_tables_destroy_list))
10090 rcu_barrier();
a499b03b 10091again:
0854db2a 10092 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 10093 if (nft_table_has_owner(table) &&
10094 n->portid == table->nlpid) {
10095 __nft_release_hook(net, table);
a499b03b
FW		 10096 list_del_rcu(&table->list);
10097 to_delete[deleted++] = table;
10098 if (deleted >= ARRAY_SIZE(to_delete))
10099 break;
6001a930
PNA		 10100 }
10101 }
a499b03b
FW		 10102 if (deleted) {
10103 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 10104 synchronize_rcu();
a499b03b
FW		 10105 while (deleted)
10106 __nft_release_table(net, to_delete[--deleted]);
10107
10108 if (restart)
10109 goto again;
6001a930 10110 }
0854db2a 10111 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 10112
10113 return NOTIFY_DONE;
df05ef87
PNA		 10114}
10115
6001a930
PNA		 10116static struct notifier_block nft_nl_notifier = {
10117 .notifier_call = nft_rcv_nl_event,
10118};
10119
dd4cbef7
PNA		 10120static int __net_init nf_tables_init_net(struct net *net)
10121{
d59d2f82 10122 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10123
10124 INIT_LIST_HEAD(&nft_net->tables);
10125 INIT_LIST_HEAD(&nft_net->commit_list);
10126 INIT_LIST_HEAD(&nft_net->module_list);
10127 INIT_LIST_HEAD(&nft_net->notify_list);
10128 mutex_init(&nft_net->commit_mutex);
10129 nft_net->base_seq = 1;
10130 nft_net->validate_state = NFT_VALIDATE_SKIP;
a654de8f 10131
dd4cbef7
PNA		 10132 return 0;
10133}
10134
767d1216
PNA		 10135static void __net_exit nf_tables_pre_exit_net(struct net *net)
10136{
3923b1e4
PNA		 10137 struct nftables_pernet *nft_net = nft_pernet(net);
10138
10139 mutex_lock(&nft_net->commit_mutex);
767d1216 10140 __nft_release_hooks(net);
3923b1e4 10141 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 10142}
10143
dd4cbef7
PNA		 10144static void __net_exit nf_tables_exit_net(struct net *net)
10145{
d59d2f82 10146 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10147
10148 mutex_lock(&nft_net->commit_mutex);
03c1f1ef
SY		 10149 if (!list_empty(&nft_net->commit_list) ||
10150 !list_empty(&nft_net->module_list))
c0391b6a 10151 __nf_tables_abort(net, NFNL_ABORT_NONE);
bd1777b3 10152 __nft_release_tables(net);
0854db2a
FW		 10153 mutex_unlock(&nft_net->commit_mutex);
10154 WARN_ON_ONCE(!list_empty(&nft_net->tables));
10155 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
10156 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 10157}
10158
99633ab2 10159static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 10160 .init = nf_tables_init_net,
10161 .pre_exit = nf_tables_pre_exit_net,
10162 .exit = nf_tables_exit_net,
0854db2a
FW		 10163 .id = &nf_tables_net_id,
10164 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 10165};
10166
96518518
PM		 10167static int __init nf_tables_module_init(void)
10168{
10169 int err;
10170
d209df3e
FW		 10171 err = register_pernet_subsys(&nf_tables_net_ops);
10172 if (err < 0)
10173 return err;
10174
10175 err = nft_chain_filter_init();
10176 if (err < 0)
6001a930 10177 goto err_chain_filter;
02c7b25e 10178
96518518
PM		 10179 err = nf_tables_core_module_init();
10180 if (err < 0)
6001a930 10181 goto err_core_module;
96518518 10182
d209df3e 10183 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 10184 if (err < 0)
6001a930 10185 goto err_netdev_notifier;
96518518 10186
4d44175a
FW		 10187 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
10188 if (err < 0)
6001a930 10189 goto err_rht_objname;
4d44175a 10190
06d392cb 10191 err = nft_offload_init();
10192 if (err < 0)
6001a930
PNA		 10193 goto err_offload;
10194
10195 err = netlink_register_notifier(&nft_nl_notifier);
10196 if (err < 0)
10197 goto err_netlink_notifier;
06d392cb 10198
d209df3e
FW		 10199 /* must be last */
10200 err = nfnetlink_subsys_register(&nf_tables_subsys);
10201 if (err < 0)
6001a930 10202 goto err_nfnl_subsys;
3b49e2e9 10203
c1deb065 10204 nft_chain_route_init();
3474a2c6 10205
d209df3e 10206 return err;
6001a930
PNA		 10207
10208err_nfnl_subsys:
10209 netlink_unregister_notifier(&nft_nl_notifier);
10210err_netlink_notifier:
06d392cb 10211 nft_offload_exit();
6001a930 10212err_offload:
4d44175a 10213 rhltable_destroy(&nft_objname_ht);
6001a930 10214err_rht_objname:
d209df3e 10215 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 10216err_netdev_notifier:
96518518 10217 nf_tables_core_module_exit();
6001a930 10218err_core_module:
d209df3e 10219 nft_chain_filter_fini();
6001a930 10220err_chain_filter:
d209df3e 10221 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 10222 return err;
10223}
10224
10225static void __exit nf_tables_module_exit(void)
10226{
10227 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 10228 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 10229 nft_offload_exit();
3b49e2e9 10230 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 10231 nft_chain_filter_fini();
c1deb065 10232 nft_chain_route_fini();
71ad00c5 10233 unregister_pernet_subsys(&nf_tables_net_ops);
0935d558 10234 cancel_work_sync(&trans_destroy_work);
1b1bc49c 10235 rcu_barrier();
4d44175a 10236 rhltable_destroy(&nft_objname_ht);
96518518 10237 nf_tables_core_module_exit();
96518518
PM		 10238}
10239
10240module_init(nf_tables_module_init);
10241module_exit(nf_tables_module_exit);
10242
10243MODULE_LICENSE("GPL");
10244MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
10245MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Linux 6.x block layer and io_uring tree(s)