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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
[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
ED		 1536 do {
1537 seq = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1538 pkts = cpu_stats->pkts;
1539 bytes = cpu_stats->bytes;
1540 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, seq));
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,
2762 const struct nft_expr *expr)
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;
2772 if (expr->ops->dump(skb, expr) < 0)
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
PM		 2783int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
2784 const struct nft_expr *expr)
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;
2791 if (nf_tables_fill_expr_info(skb, expr) < 0)
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
2860static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 2861 const struct nft_expr_info *expr_info,
96518518
PM		 2862 struct nft_expr *expr)
2863{
7dab8ee3 2864 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 2865 int err;
2866
2867 expr->ops = ops;
2868 if (ops->init) {
7dab8ee3 2869 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 2870 if (err < 0)
2871 goto err1;
2872 }
2873
96518518 2874 return 0;
96518518
PM		 2875err1:
2876 expr->ops = NULL;
2877 return err;
2878}
2879
62472bce
PM		 2880static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
2881 struct nft_expr *expr)
96518518 2882{
3f3a390d
PNA		 2883 const struct nft_expr_type *type = expr->ops->type;
2884
96518518 2885 if (expr->ops->destroy)
62472bce 2886 expr->ops->destroy(ctx, expr);
3f3a390d 2887 module_put(type->owner);
96518518
PM		 2888}
2889
795a6d6b
PNA		 2890static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
2891 const struct nlattr *nla)
0b2d8a7b 2892{
7dab8ee3 2893 struct nft_expr_info expr_info;
0b2d8a7b 2894 struct nft_expr *expr;
b8e20400 2895 struct module *owner;
0b2d8a7b
PM		 2896 int err;
2897
7dab8ee3 2898 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 2899 if (err < 0)
52077804
PNA		 2900 goto err_expr_parse;
2901
2902 err = -EOPNOTSUPP;
2903 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
2904 goto err_expr_stateful;
0b2d8a7b
PM		 2905
2906 err = -ENOMEM;
33758c89 2907 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 2908 if (expr == NULL)
52077804 2909 goto err_expr_stateful;
0b2d8a7b 2910
7dab8ee3 2911 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 2912 if (err < 0)
52077804 2913 goto err_expr_new;
0b2d8a7b
PM		 2914
2915 return expr;
52077804 2916err_expr_new:
6cafaf47 2917 kfree(expr);
52077804 2918err_expr_stateful:
7dab8ee3
PNA		 2919 owner = expr_info.ops->type->owner;
2920 if (expr_info.ops->type->release_ops)
2921 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 2922
2923 module_put(owner);
52077804 2924err_expr_parse:
0b2d8a7b
PM		 2925 return ERR_PTR(err);
2926}
2927
c604cc69
PNA		 2928int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
2929{
2930 int err;
2931
2932 if (src->ops->clone) {
2933 dst->ops = src->ops;
2934 err = src->ops->clone(dst, src);
2935 if (err < 0)
2936 return err;
2937 } else {
2938 memcpy(dst, src, src->ops->size);
2939 }
2940
2941 __module_get(src->ops->type->owner);
2942
2943 return 0;
2944}
2945
0b2d8a7b
PM		 2946void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
2947{
2948 nf_tables_expr_destroy(ctx, expr);
2949 kfree(expr);
2950}
2951
96518518
PM		 2952/*
2953 * Rules
2954 */
2955
cac20fcd
PNA		 2956static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
2957 u64 handle)
96518518
PM		 2958{
2959 struct nft_rule *rule;
2960
2961 // FIXME: this sucks
d9adf22a 2962 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 2963 if (handle == rule->handle)
2964 return rule;
2965 }
2966
2967 return ERR_PTR(-ENOENT);
2968}
2969
cac20fcd
PNA		 2970static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
2971 const struct nlattr *nla)
96518518
PM		 2972{
2973 if (nla == NULL)
2974 return ERR_PTR(-EINVAL);
2975
cac20fcd 2976 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 2977}
2978
2979static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 2980 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
2981 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 2982 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
2983 .len = NFT_CHAIN_MAXNAMELEN - 1 },
2984 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
2985 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
0ca743a5 2986 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 2987 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 2988 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
2989 .len = NFT_USERDATA_MAXLEN },
467697d2 2990 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 2991 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 2992 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 2993};
2994
84d7fce6
PNA		 2995static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
2996 u32 portid, u32 seq, int event,
2997 u32 flags, int family,
96518518
PM		 2998 const struct nft_table *table,
2999 const struct nft_chain *chain,
e189ae16 3000 const struct nft_rule *rule, u64 handle)
96518518
PM		 3001{
3002 struct nlmsghdr *nlh;
96518518
PM		 3003 const struct nft_expr *expr, *next;
3004 struct nlattr *list;
dedb67c4 3005 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3006
19c28b13
PNA		 3007 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3008 nft_base_seq(net));
3009 if (!nlh)
96518518
PM		 3010 goto nla_put_failure;
3011
96518518
PM		 3012 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3013 goto nla_put_failure;
3014 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3015 goto nla_put_failure;
b46f6ded
ND		 3016 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3017 NFTA_RULE_PAD))
96518518
PM		 3018 goto nla_put_failure;
3019
e189ae16
PNA		 3020 if (event != NFT_MSG_DELRULE && handle) {
3021 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3022 NFTA_RULE_PAD))
5e948466
EL		 3023 goto nla_put_failure;
3024 }
3025
b72920f6
PNA		 3026 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3027 nft_flow_rule_stats(chain, rule);
3028
ae0be8de 3029 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3030 if (list == NULL)
3031 goto nla_put_failure;
3032 nft_rule_for_each_expr(expr, next, rule) {
0b2d8a7b 3033 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
96518518 3034 goto nla_put_failure;
96518518
PM		 3035 }
3036 nla_nest_end(skb, list);
3037
86f1ec32
PM		 3038 if (rule->udata) {
3039 struct nft_userdata *udata = nft_userdata(rule);
3040 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3041 udata->data) < 0)
3042 goto nla_put_failure;
3043 }
0768b3b3 3044
053c095a
JB		 3045 nlmsg_end(skb, nlh);
3046 return 0;
96518518
PM		 3047
3048nla_put_failure:
3049 nlmsg_trim(skb, nlh);
3050 return -1;
3051}
3052
25e94a99
PNA		 3053static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3054 const struct nft_rule *rule, int event)
96518518 3055{
d59d2f82 3056 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3057 const struct nft_rule *prule;
96518518 3058 struct sk_buff *skb;
e189ae16
PNA		 3059 u64 handle = 0;
3060 u16 flags = 0;
96518518
PM		 3061 int err;
3062
128ad332
PNA		 3063 if (!ctx->report &&
3064 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3065 return;
96518518 3066
96518518
PM		 3067 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3068 if (skb == NULL)
3069 goto err;
3070
e189ae16
PNA		 3071 if (event == NFT_MSG_NEWRULE &&
3072 !list_is_first(&rule->list, &ctx->chain->rules) &&
3073 !list_is_last(&rule->list, &ctx->chain->rules)) {
3074 prule = list_prev_entry(rule, list);
3075 handle = prule->handle;
3076 }
3077 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3078 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3079 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3080 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3081
84d7fce6 3082 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16
PNA		 3083 event, flags, ctx->family, ctx->table,
3084 ctx->chain, rule, handle);
96518518
PM		 3085 if (err < 0) {
3086 kfree_skb(skb);
3087 goto err;
3088 }
3089
0854db2a 3090 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3091 return;
96518518 3092err:
25e94a99 3093 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3094}
3095
6e1f760e 3096struct nft_rule_dump_ctx {
e46abbcc 3097 char *table;
b7263e07 3098 char *chain;
6e1f760e
PNA		 3099};
3100
241faece
PS		 3101static int __nf_tables_dump_rules(struct sk_buff *skb,
3102 unsigned int *idx,
3103 struct netlink_callback *cb,
3104 const struct nft_table *table,
3105 const struct nft_chain *chain)
3106{
3107 struct net *net = sock_net(skb->sk);
2c82c7e7 3108 const struct nft_rule *rule, *prule;
241faece 3109 unsigned int s_idx = cb->args[0];
e189ae16 3110 u64 handle;
241faece 3111
2c82c7e7 3112 prule = NULL;
241faece
PS		 3113 list_for_each_entry_rcu(rule, &chain->rules, list) {
3114 if (!nft_is_active(net, rule))
2c82c7e7 3115 goto cont_skip;
241faece
PS		 3116 if (*idx < s_idx)
3117 goto cont;
3118 if (*idx > s_idx) {
3119 memset(&cb->args[1], 0,
3120 sizeof(cb->args) - sizeof(cb->args[0]));
3121 }
e189ae16
PNA		 3122 if (prule)
3123 handle = prule->handle;
3124 else
3125 handle = 0;
3126
241faece
PS		 3127 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3128 cb->nlh->nlmsg_seq,
3129 NFT_MSG_NEWRULE,
3130 NLM_F_MULTI | NLM_F_APPEND,
3131 table->family,
e189ae16 3132 table, chain, rule, handle) < 0)
310529e6 3133 return 1;
241faece
PS		 3134
3135 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3136cont:
2c82c7e7
FW		 3137 prule = rule;
3138cont_skip:
241faece
PS		 3139 (*idx)++;
3140 }
310529e6 3141 return 0;
241faece
PS		 3142}
3143
96518518
PM		 3144static int nf_tables_dump_rules(struct sk_buff *skb,
3145 struct netlink_callback *cb)
3146{
3147 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6e1f760e 3148 const struct nft_rule_dump_ctx *ctx = cb->data;
241faece 3149 struct nft_table *table;
96518518 3150 const struct nft_chain *chain;
241faece 3151 unsigned int idx = 0;
99633ab2 3152 struct net *net = sock_net(skb->sk);
96518518 3153 int family = nfmsg->nfgen_family;
0854db2a 3154 struct nftables_pernet *nft_net;
96518518 3155
e688a7f8 3156 rcu_read_lock();
d59d2f82 3157 nft_net = nft_pernet(net);
34002783 3158 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3159
0854db2a 3160 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3161 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3162 continue;
3163
3164 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3165 continue;
3166
715849ab 3167 if (ctx && ctx->table && ctx->chain) {
241faece 3168 struct rhlist_head *list, *tmp;
6e1f760e 3169
241faece
PS		 3170 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3171 nft_chain_ht_params);
3172 if (!list)
3173 goto done;
3174
3175 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3176 if (!nft_is_active(net, chain))
3177 continue;
3178 __nf_tables_dump_rules(skb, &idx,
3179 cb, table, chain);
3180 break;
96518518 3181 }
241faece 3182 goto done;
96518518 3183 }
241faece
PS		 3184
3185 list_for_each_entry_rcu(chain, &table->chains, list) {
3186 if (__nf_tables_dump_rules(skb, &idx, cb, table, chain))
3187 goto done;
3188 }
3189
3190 if (ctx && ctx->table)
3191 break;
96518518
PM		 3192 }
3193done:
e688a7f8 3194 rcu_read_unlock();
310529e6
PS		 3195
3196 cb->args[0] = idx;
96518518
PM		 3197 return skb->len;
3198}
3199
90fd131a
FW		 3200static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3201{
3202 const struct nlattr * const *nla = cb->data;
3203 struct nft_rule_dump_ctx *ctx = NULL;
3204
3205 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3206 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3207 if (!ctx)
3208 return -ENOMEM;
3209
3210 if (nla[NFTA_RULE_TABLE]) {
3211 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3212 GFP_ATOMIC);
3213 if (!ctx->table) {
3214 kfree(ctx);
3215 return -ENOMEM;
3216 }
3217 }
3218 if (nla[NFTA_RULE_CHAIN]) {
3219 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3220 GFP_ATOMIC);
3221 if (!ctx->chain) {
3222 kfree(ctx->table);
3223 kfree(ctx);
3224 return -ENOMEM;
3225 }
3226 }
3227 }
3228
3229 cb->data = ctx;
3230 return 0;
3231}
3232
6e1f760e
PNA		 3233static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3234{
e46abbcc
PS		 3235 struct nft_rule_dump_ctx *ctx = cb->data;
3236
3237 if (ctx) {
3238 kfree(ctx->table);
b7263e07 3239 kfree(ctx->chain);
e46abbcc
PS		 3240 kfree(ctx);
3241 }
6e1f760e
PNA		 3242 return 0;
3243}
3244
d9adf22a 3245/* called with rcu_read_lock held */
797d4980
PNA		 3246static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3247 const struct nlattr * const nla[])
96518518 3248{
797d4980
PNA		 3249 struct netlink_ext_ack *extack = info->extack;
3250 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3251 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3252 const struct nft_chain *chain;
3253 const struct nft_rule *rule;
797d4980 3254 struct net *net = info->net;
1b2470e5 3255 struct nft_table *table;
96518518 3256 struct sk_buff *skb2;
96518518
PM		 3257 int err;
3258
797d4980 3259 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518 3260 struct netlink_dump_control c = {
90fd131a 3261 .start= nf_tables_dump_rules_start,
96518518 3262 .dump = nf_tables_dump_rules,
6e1f760e 3263 .done = nf_tables_dump_rules_done,
d9adf22a 3264 .module = THIS_MODULE,
90fd131a 3265 .data = (void *)nla,
96518518 3266 };
6e1f760e 3267
797d4980 3268 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 3269 }
3270
6001a930 3271 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3272 if (IS_ERR(table)) {
3273 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3274 return PTR_ERR(table);
36dd1bcc 3275 }
96518518 3276
f102d66b 3277 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3278 if (IS_ERR(chain)) {
3279 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
96518518 3280 return PTR_ERR(chain);
36dd1bcc 3281 }
96518518 3282
cac20fcd 3283 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3284 if (IS_ERR(rule)) {
3285 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3286 return PTR_ERR(rule);
36dd1bcc 3287 }
96518518 3288
d9adf22a 3289 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 3290 if (!skb2)
3291 return -ENOMEM;
3292
84d7fce6 3293 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 3294 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
e189ae16 3295 family, table, chain, rule, 0);
96518518 3296 if (err < 0)
ee921183 3297 goto err_fill_rule_info;
96518518 3298
ee921183 3299 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 3300
ee921183 3301err_fill_rule_info:
96518518
PM		 3302 kfree_skb(skb2);
3303 return err;
3304}
3305
62472bce
PM		 3306static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
3307 struct nft_rule *rule)
96518518 3308{
29e38801 3309 struct nft_expr *expr, *next;
96518518
PM		 3310
3311 /*
3312 * Careful: some expressions might not be initialized in case this
3313 * is called on error from nf_tables_newrule().
3314 */
3315 expr = nft_expr_first(rule);
31cc578a 3316 while (nft_expr_more(rule, expr)) {
29e38801 3317 next = nft_expr_next(expr);
62472bce 3318 nf_tables_expr_destroy(ctx, expr);
29e38801 3319 expr = next;
96518518
PM		 3320 }
3321 kfree(rule);
3322}
3323
d0e2c7de 3324void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3325{
f6ac8585 3326 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3327 nf_tables_rule_destroy(ctx, rule);
3328}
3329
a654de8f
PNA		 3330int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3331{
3332 struct nft_expr *expr, *last;
3333 const struct nft_data *data;
3334 struct nft_rule *rule;
3335 int err;
3336
26b2f552
TY		 3337 if (ctx->level == NFT_JUMP_STACK_SIZE)
3338 return -EMLINK;
3339
a654de8f
PNA		 3340 list_for_each_entry(rule, &chain->rules, list) {
3341 if (!nft_is_active_next(ctx->net, rule))
3342 continue;
3343
3344 nft_rule_for_each_expr(expr, last, rule) {
3345 if (!expr->ops->validate)
3346 continue;
3347
3348 err = expr->ops->validate(ctx, expr, &data);
3349 if (err < 0)
3350 return err;
3351 }
81ea0106
FW		 3352
3353 cond_resched();
a654de8f
PNA		 3354 }
3355
3356 return 0;
3357}
3358EXPORT_SYMBOL_GPL(nft_chain_validate);
3359
3360static int nft_table_validate(struct net *net, const struct nft_table *table)
3361{
3362 struct nft_chain *chain;
3363 struct nft_ctx ctx = {
3364 .net = net,
3365 .family = table->family,
3366 };
3367 int err;
3368
3369 list_for_each_entry(chain, &table->chains, list) {
3370 if (!nft_is_base_chain(chain))
3371 continue;
3372
3373 ctx.chain = chain;
3374 err = nft_chain_validate(&ctx, chain);
3375 if (err < 0)
3376 return err;
3377 }
3378
3379 return 0;
3380}
3381
75dd48e2 3382static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3383 const struct nft_chain *chain,
75dd48e2
PS		 3384 const struct nlattr *nla);
3385
1081d11b
PNA		 3386#define NFT_RULE_MAXEXPRS 128
3387
7dab8ee3
PNA		 3388static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3389 const struct nlattr * const nla[])
96518518 3390{
7dab8ee3 3391 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3392 struct netlink_ext_ack *extack = info->extack;
3393 unsigned int size, i, n, ulen = 0, usize = 0;
3394 u8 genmask = nft_genmask_next(info->net);
3395 struct nft_rule *rule, *old_rule = NULL;
3396 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3397 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3398 struct nft_flow_rule *flow = NULL;
7dab8ee3 3399 struct net *net = info->net;
7dab8ee3 3400 struct nft_userdata *udata;
96518518
PM		 3401 struct nft_table *table;
3402 struct nft_chain *chain;
7dab8ee3
PNA		 3403 struct nft_trans *trans;
3404 u64 handle, pos_handle;
96518518
PM		 3405 struct nft_expr *expr;
3406 struct nft_ctx ctx;
3407 struct nlattr *tmp;
96518518 3408 int err, rem;
96518518 3409
0854db2a 3410 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3411
6001a930
PNA		 3412 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3413 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3414 if (IS_ERR(table)) {
3415 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3416 return PTR_ERR(table);
36dd1bcc 3417 }
96518518 3418
837830a4
PNA		 3419 if (nla[NFTA_RULE_CHAIN]) {
3420 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3421 genmask);
3422 if (IS_ERR(chain)) {
3423 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3424 return PTR_ERR(chain);
3425 }
d0e2c7de
PNA		 3426 if (nft_chain_is_bound(chain))
3427 return -EOPNOTSUPP;
3428
837830a4 3429 } else if (nla[NFTA_RULE_CHAIN_ID]) {
95f466d2 3430 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
837830a4
PNA		 3431 if (IS_ERR(chain)) {
3432 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3433 return PTR_ERR(chain);
3434 }
3435 } else {
3436 return -EINVAL;
36dd1bcc 3437 }
96518518
PM		 3438
3439 if (nla[NFTA_RULE_HANDLE]) {
3440 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3441 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3442 if (IS_ERR(rule)) {
3443 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3444 return PTR_ERR(rule);
36dd1bcc 3445 }
96518518 3446
7dab8ee3 3447 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3448 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3449 return -EEXIST;
36dd1bcc 3450 }
7dab8ee3 3451 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3452 old_rule = rule;
3453 else
3454 return -EOPNOTSUPP;
3455 } else {
7dab8ee3
PNA		 3456 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3457 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3458 return -EINVAL;
3459 handle = nf_tables_alloc_handle(table);
a0a7379e
PNA		 3460
3461 if (chain->use == UINT_MAX)
3462 return -EOVERFLOW;
5e948466 3463
447750f2
FW		 3464 if (nla[NFTA_RULE_POSITION]) {
3465 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3466 old_rule = __nft_rule_lookup(chain, pos_handle);
3467 if (IS_ERR(old_rule)) {
3468 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3469 return PTR_ERR(old_rule);
3470 }
75dd48e2 3471 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3472 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3473 if (IS_ERR(old_rule)) {
3474 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3475 return PTR_ERR(old_rule);
3476 }
36dd1bcc 3477 }
5e948466
EL		 3478 }
3479
7dab8ee3 3480 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3481
96518518
PM		 3482 n = 0;
3483 size = 0;
3484 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3485 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3486 sizeof(struct nft_expr_info),
3487 GFP_KERNEL);
3488 if (!expr_info)
2a43ecf9
FW		 3489 return -ENOMEM;
3490
96518518
PM		 3491 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3492 err = -EINVAL;
3493 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3494 goto err_release_expr;
96518518 3495 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3496 goto err_release_expr;
7dab8ee3 3497 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3498 if (err < 0) {
3499 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3500 goto err_release_expr;
c781471d 3501 }
7dab8ee3 3502 size += expr_info[n].ops->size;
96518518
PM		 3503 n++;
3504 }
3505 }
9889840f
PM		 3506 /* Check for overflow of dlen field */
3507 err = -EFBIG;
3508 if (size >= 1 << 12)
3c5e4462 3509 goto err_release_expr;
96518518 3510
86f1ec32 3511 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3512 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3513 if (ulen > 0)
3514 usize = sizeof(struct nft_userdata) + ulen;
3515 }
0768b3b3 3516
96518518 3517 err = -ENOMEM;
33758c89 3518 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3519 if (rule == NULL)
3c5e4462 3520 goto err_release_expr;
96518518 3521
889f7ee7 3522 nft_activate_next(net, rule);
0628b123 3523
96518518
PM		 3524 rule->handle = handle;
3525 rule->dlen = size;
86f1ec32 3526 rule->udata = ulen ? 1 : 0;
0768b3b3 3527
86f1ec32
PM		 3528 if (ulen) {
3529 udata = nft_userdata(rule);
3530 udata->len = ulen - 1;
3531 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3532 }
96518518 3533
96518518
PM		 3534 expr = nft_expr_first(rule);
3535 for (i = 0; i < n; i++) {
7dab8ee3 3536 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 3537 if (err < 0) {
7dab8ee3 3538 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 3539 goto err_release_rule;
83d9dcba 3540 }
a654de8f 3541
7dab8ee3 3542 if (expr_info[i].ops->validate)
a654de8f
PNA		 3543 nft_validate_state_update(net, NFT_VALIDATE_NEED);
3544
7dab8ee3 3545 expr_info[i].ops = NULL;
96518518
PM		 3546 expr = nft_expr_next(expr);
3547 }
3548
3c5e4462
PNA		 3549 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3550 flow = nft_flow_rule_create(net, rule);
3551 if (IS_ERR(flow)) {
3552 err = PTR_ERR(flow);
3553 goto err_release_rule;
3554 }
3555 }
3556
7dab8ee3 3557 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
2c964c55
PNA		 3558 err = nft_delrule(&ctx, old_rule);
3559 if (err < 0)
3560 goto err_destroy_flow_rule;
3561
ca089878 3562 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 3563 if (trans == NULL) {
3564 err = -ENOMEM;
3c5e4462 3565 goto err_destroy_flow_rule;
569ccae6 3566 }
569ccae6
FW		 3567 list_add_tail_rcu(&rule->list, &old_rule->list);
3568 } else {
c9626a2c
PNA		 3569 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3570 if (!trans) {
569ccae6 3571 err = -ENOMEM;
3c5e4462 3572 goto err_destroy_flow_rule;
569ccae6
FW		 3573 }
3574
7dab8ee3 3575 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 3576 if (old_rule)
3577 list_add_rcu(&rule->list, &old_rule->list);
3578 else
3579 list_add_tail_rcu(&rule->list, &chain->rules);
3580 } else {
3581 if (old_rule)
3582 list_add_tail_rcu(&rule->list, &old_rule->list);
3583 else
3584 list_add_rcu(&rule->list, &chain->rules);
3585 }
0628b123 3586 }
7dab8ee3 3587 kvfree(expr_info);
4fefee57 3588 chain->use++;
96518518 3589
3c5e4462
PNA		 3590 if (flow)
3591 nft_trans_flow_rule(trans) = flow;
3592
0854db2a 3593 if (nft_net->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 3594 return nft_table_validate(net, table);
3595
3596 return 0;
3c5e4462
PNA		 3597
3598err_destroy_flow_rule:
4ca041f9
CIK		 3599 if (flow)
3600 nft_flow_rule_destroy(flow);
3c5e4462 3601err_release_rule:
bb7b40ae 3602 nf_tables_rule_release(&ctx, rule);
3c5e4462 3603err_release_expr:
96518518 3604 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 3605 if (expr_info[i].ops) {
3606 module_put(expr_info[i].ops->type->owner);
3607 if (expr_info[i].ops->type->release_ops)
3608 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 3609 }
96518518 3610 }
7dab8ee3
PNA		 3611 kvfree(expr_info);
3612
96518518
PM		 3613 return err;
3614}
3615
1a94e38d 3616static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3617 const struct nft_chain *chain,
1a94e38d
PNA		 3618 const struct nlattr *nla)
3619{
d59d2f82 3620 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 3621 u32 id = ntohl(nla_get_be32(nla));
3622 struct nft_trans *trans;
3623
0854db2a 3624 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d
PNA		 3625 struct nft_rule *rule = nft_trans_rule(trans);
3626
3627 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 3628 trans->ctx.chain == chain &&
1a94e38d
PNA		 3629 id == nft_trans_rule_id(trans))
3630 return rule;
3631 }
3632 return ERR_PTR(-ENOENT);
3633}
3634
7dab8ee3
PNA		 3635static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3636 const struct nlattr * const nla[])
96518518 3637{
7dab8ee3 3638 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 3639 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 3640 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 3641 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 3642 struct net *net = info->net;
3643 struct nft_table *table;
cf9dc09d 3644 struct nft_rule *rule;
0628b123 3645 struct nft_ctx ctx;
ef4b65e5 3646 int err = 0;
96518518 3647
6001a930
PNA		 3648 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3649 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3650 if (IS_ERR(table)) {
3651 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3652 return PTR_ERR(table);
36dd1bcc 3653 }
96518518 3654
cf9dc09d 3655 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 3656 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3657 genmask);
36dd1bcc
PNA		 3658 if (IS_ERR(chain)) {
3659 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 3660 return PTR_ERR(chain);
36dd1bcc 3661 }
d0e2c7de
PNA		 3662 if (nft_chain_is_bound(chain))
3663 return -EOPNOTSUPP;
cf9dc09d 3664 }
96518518 3665
7dab8ee3 3666 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 3667
cf9dc09d
PNA		 3668 if (chain) {
3669 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 3670 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3671 if (IS_ERR(rule)) {
3672 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 3673 return PTR_ERR(rule);
36dd1bcc 3674 }
96518518 3675
1a94e38d
PNA		 3676 err = nft_delrule(&ctx, rule);
3677 } else if (nla[NFTA_RULE_ID]) {
36d5b291 3678 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 3679 if (IS_ERR(rule)) {
3680 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 3681 return PTR_ERR(rule);
36dd1bcc 3682 }
1a94e38d 3683
5e266fe7 3684 err = nft_delrule(&ctx, rule);
cf9dc09d 3685 } else {
ce24b721 3686 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 3687 }
3688 } else {
3689 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 3690 if (!nft_is_active_next(net, chain))
3691 continue;
3692
cf9dc09d 3693 ctx.chain = chain;
ce24b721 3694 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 3695 if (err < 0)
3696 break;
3697 }
3698 }
3699
3700 return err;
3701}
3702
20a69341
PM		 3703/*
3704 * Sets
3705 */
e32a4dc6
FW		 3706static const struct nft_set_type *nft_set_types[] = {
3707 &nft_set_hash_fast_type,
3708 &nft_set_hash_type,
3709 &nft_set_rhash_type,
3710 &nft_set_bitmap_type,
3711 &nft_set_rbtree_type,
e6abef61 3712#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 3713 &nft_set_pipapo_avx2_type,
3714#endif
e32a4dc6
FW		 3715 &nft_set_pipapo_type,
3716};
20a69341 3717
2b664957 3718#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 3719 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3720 NFT_SET_EVAL)
2b664957 3721
71cc0873 3722static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 3723{
71cc0873 3724 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 3725}
3726
c50b960c
PM		 3727/*
3728 * Select a set implementation based on the data characteristics and the
3729 * given policy. The total memory use might not be known if no size is
3730 * given, in that case the amount of memory per element is used.
3731 */
3732static const struct nft_set_ops *
2b664957
PNA		 3733nft_select_set_ops(const struct nft_ctx *ctx,
3734 const struct nlattr * const nla[],
c50b960c
PM		 3735 const struct nft_set_desc *desc,
3736 enum nft_set_policies policy)
20a69341 3737{
d59d2f82 3738 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 3739 const struct nft_set_ops *ops, *bops;
3740 struct nft_set_estimate est, best;
2b664957
PNA		 3741 const struct nft_set_type *type;
3742 u32 flags = 0;
e32a4dc6 3743 int i;
20a69341 3744
0854db2a 3745 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3746 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 3747
2b664957
PNA		 3748 if (nla[NFTA_SET_FLAGS] != NULL)
3749 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 3750
55af753c
PNA		 3751 bops = NULL;
3752 best.size = ~0;
3753 best.lookup = ~0;
0b5a7874 3754 best.space = ~0;
c50b960c 3755
e32a4dc6
FW		 3756 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
3757 type = nft_set_types[i];
71cc0873 3758 ops = &type->ops;
2b664957 3759
71cc0873 3760 if (!nft_set_ops_candidate(type, flags))
20a69341 3761 continue;
2b664957 3762 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 3763 continue;
3764
3765 switch (policy) {
3766 case NFT_SET_POL_PERFORMANCE:
55af753c 3767 if (est.lookup < best.lookup)
c50b960c 3768 break;
644e334e
PNA		 3769 if (est.lookup == best.lookup &&
3770 est.space < best.space)
3771 break;
c50b960c
PM		 3772 continue;
3773 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 3774 if (!desc->size) {
3775 if (est.space < best.space)
3776 break;
3777 if (est.space == best.space &&
3778 est.lookup < best.lookup)
3779 break;
4f2921ca 3780 } else if (est.size < best.size || !bops) {
c50b960c 3781 break;
0b5a7874 3782 }
c50b960c
PM		 3783 continue;
3784 default:
3785 break;
3786 }
3787
c50b960c
PM		 3788 bops = ops;
3789 best = est;
20a69341
PM		 3790 }
3791
c50b960c
PM		 3792 if (bops != NULL)
3793 return bops;
3794
20a69341
PM		 3795 return ERR_PTR(-EOPNOTSUPP);
3796}
3797
3798static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 3799 [NFTA_SET_TABLE] = { .type = NLA_STRING,
3800 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 3801 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 3802 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 3803 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
3804 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
3805 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
3806 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
3807 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 3808 [NFTA_SET_POLICY] = { .type = NLA_U32 },
3809 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 3810 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 3811 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
3812 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 3813 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
3814 .len = NFT_USERDATA_MAXLEN },
8aeff920 3815 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 3816 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 3817 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
48b0ae04 3818 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
c50b960c
PM		 3819};
3820
3821static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
3822 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
f3a2181e 3823 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
20a69341
PM		 3824};
3825
cac20fcd
PNA		 3826static struct nft_set *nft_set_lookup(const struct nft_table *table,
3827 const struct nlattr *nla, u8 genmask)
20a69341
PM		 3828{
3829 struct nft_set *set;
3830
3831 if (nla == NULL)
3832 return ERR_PTR(-EINVAL);
3833
d9adf22a 3834 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 3835 if (!nla_strcmp(nla, set->name) &&
3836 nft_active_genmask(set, genmask))
20a69341
PM		 3837 return set;
3838 }
3839 return ERR_PTR(-ENOENT);
3840}
3841
cac20fcd
PNA		 3842static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
3843 const struct nlattr *nla,
3844 u8 genmask)
3ecbfd65
HS		 3845{
3846 struct nft_set *set;
3847
3ecbfd65
HS		 3848 list_for_each_entry(set, &table->sets, list) {
3849 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
3850 nft_active_genmask(set, genmask))
3851 return set;
3852 }
3853 return ERR_PTR(-ENOENT);
3854}
3855
cac20fcd 3856static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 3857 const struct nft_table *table,
cac20fcd 3858 const struct nlattr *nla, u8 genmask)
958bee14 3859{
d59d2f82 3860 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 3861 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 3862 struct nft_trans *trans;
958bee14 3863
0854db2a 3864 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 3865 if (trans->msg_type == NFT_MSG_NEWSET) {
3866 struct nft_set *set = nft_trans_set(trans);
37a9cc52 3867
9c7f96fd 3868 if (id == nft_trans_set_id(trans) &&
470ee20e 3869 set->table == table &&
9c7f96fd
AK		 3870 nft_active_genmask(set, genmask))
3871 return set;
3872 }
958bee14
PNA		 3873 }
3874 return ERR_PTR(-ENOENT);
3875}
c7a72e3f 3876
10659cba
PNA		 3877struct nft_set *nft_set_lookup_global(const struct net *net,
3878 const struct nft_table *table,
3879 const struct nlattr *nla_set_name,
3880 const struct nlattr *nla_set_id,
3881 u8 genmask)
c7a72e3f
PNA		 3882{
3883 struct nft_set *set;
3884
cac20fcd 3885 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 3886 if (IS_ERR(set)) {
3887 if (!nla_set_id)
3888 return set;
3889
470ee20e 3890 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 3891 }
3892 return set;
3893}
10659cba 3894EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 3895
20a69341
PM		 3896static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
3897 const char *name)
3898{
3899 const struct nft_set *i;
3900 const char *p;
3901 unsigned long *inuse;
60eb1894 3902 unsigned int n = 0, min = 0;
20a69341 3903
38745490 3904 p = strchr(name, '%');
20a69341
PM		 3905 if (p != NULL) {
3906 if (p[1] != 'd' || strchr(p + 2, '%'))
3907 return -EINVAL;
3908
3909 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
3910 if (inuse == NULL)
3911 return -ENOMEM;
60eb1894 3912cont:
20a69341 3913 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 3914 int tmp;
3915
271c5ca8 3916 if (!nft_is_active_next(ctx->net, i))
37a9cc52 3917 continue;
14662917 3918 if (!sscanf(i->name, name, &tmp))
20a69341 3919 continue;
60eb1894 3920 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 3921 continue;
14662917 3922
60eb1894 3923 set_bit(tmp - min, inuse);
20a69341
PM		 3924 }
3925
53b70287 3926 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 3927 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
3928 min += BITS_PER_BYTE * PAGE_SIZE;
3929 memset(inuse, 0, PAGE_SIZE);
3930 goto cont;
3931 }
20a69341
PM		 3932 free_page((unsigned long)inuse);
3933 }
3934
33758c89 3935 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 3936 if (!set->name)
3937 return -ENOMEM;
3938
20a69341 3939 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 3940 if (!nft_is_active_next(ctx->net, i))
3941 continue;
e63aaaa6
AY		 3942 if (!strcmp(set->name, i->name)) {
3943 kfree(set->name);
7fb6f78d 3944 set->name = NULL;
20a69341 3945 return -ENFILE;
e63aaaa6 3946 }
20a69341
PM		 3947 }
3948 return 0;
3949}
3950
917d80d3 3951int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 3952{
3953 u64 ms = be64_to_cpu(nla_get_be64(nla));
3954 u64 max = (u64)(~((u64)0));
3955
3956 max = div_u64(max, NSEC_PER_MSEC);
3957 if (ms >= max)
3958 return -ERANGE;
3959
3960 ms *= NSEC_PER_MSEC;
3961 *result = nsecs_to_jiffies64(ms);
3962 return 0;
3963}
3964
917d80d3 3965__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 3966{
3b15d09f 3967 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 3968}
3969
f3a2181e
SB		 3970static int nf_tables_fill_set_concat(struct sk_buff *skb,
3971 const struct nft_set *set)
3972{
3973 struct nlattr *concat, *field;
3974 int i;
3975
3976 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
3977 if (!concat)
3978 return -ENOMEM;
3979
3980 for (i = 0; i < set->field_count; i++) {
3981 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
3982 if (!field)
3983 return -ENOMEM;
3984
3985 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
3986 htonl(set->field_len[i])))
3987 return -ENOMEM;
3988
3989 nla_nest_end(skb, field);
3990 }
3991
3992 nla_nest_end(skb, concat);
3993
3994 return 0;
3995}
3996
20a69341
PM		 3997static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
3998 const struct nft_set *set, u16 event, u16 flags)
3999{
20a69341 4000 struct nlmsghdr *nlh;
128ad332 4001 u32 portid = ctx->portid;
65038428 4002 struct nlattr *nest;
128ad332 4003 u32 seq = ctx->seq;
48b0ae04 4004 int i;
20a69341 4005
dedb67c4 4006 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4007 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4008 NFNETLINK_V0, nft_base_seq(ctx->net));
4009 if (!nlh)
20a69341
PM		 4010 goto nla_put_failure;
4011
20a69341
PM		 4012 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4013 goto nla_put_failure;
4014 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4015 goto nla_put_failure;
3ecbfd65
HS		 4016 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4017 NFTA_SET_PAD))
4018 goto nla_put_failure;
20a69341
PM		 4019 if (set->flags != 0)
4020 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4021 goto nla_put_failure;
4022
4023 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4024 goto nla_put_failure;
4025 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4026 goto nla_put_failure;
4027 if (set->flags & NFT_SET_MAP) {
4028 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4029 goto nla_put_failure;
4030 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4031 goto nla_put_failure;
4032 }
8aeff920
PNA		 4033 if (set->flags & NFT_SET_OBJECT &&
4034 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4035 goto nla_put_failure;
20a69341 4036
761da293 4037 if (set->timeout &&
d3e2a111 4038 nla_put_be64(skb, NFTA_SET_TIMEOUT,
8e1102d5 4039 nf_jiffies64_to_msecs(set->timeout),
b46f6ded 4040 NFTA_SET_PAD))
761da293
PM		 4041 goto nla_put_failure;
4042 if (set->gc_int &&
4043 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int)))
4044 goto nla_put_failure;
4045
9363dc4b
AB		 4046 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4047 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4048 goto nla_put_failure;
4049 }
4050
6f03bf43
PNA		 4051 if (set->udata &&
4052 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4053 goto nla_put_failure;
4054
65038428
PNA		 4055 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4056 if (!nest)
c50b960c
PM		 4057 goto nla_put_failure;
4058 if (set->size &&
4059 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4060 goto nla_put_failure;
f3a2181e
SB		 4061
4062 if (set->field_count > 1 &&
4063 nf_tables_fill_set_concat(skb, set))
4064 goto nla_put_failure;
4065
65038428
PNA		 4066 nla_nest_end(skb, nest);
4067
8cfd9b0f 4068 if (set->num_exprs == 1) {
65038428 4069 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8cfd9b0f 4070 if (nf_tables_fill_expr_info(skb, set->exprs[0]) < 0)
65038428
PNA		 4071 goto nla_put_failure;
4072
4073 nla_nest_end(skb, nest);
48b0ae04
PNA		 4074 } else if (set->num_exprs > 1) {
4075 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4076 if (nest == NULL)
65038428
PNA		 4077 goto nla_put_failure;
4078
48b0ae04
PNA		 4079 for (i = 0; i < set->num_exprs; i++) {
4080 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
4081 set->exprs[i]) < 0)
4082 goto nla_put_failure;
4083 }
65038428
PNA		 4084 nla_nest_end(skb, nest);
4085 }
c50b960c 4086
053c095a
JB		 4087 nlmsg_end(skb, nlh);
4088 return 0;
20a69341
PM		 4089
4090nla_put_failure:
4091 nlmsg_trim(skb, nlh);
4092 return -1;
4093}
4094
25e94a99
PNA		 4095static void nf_tables_set_notify(const struct nft_ctx *ctx,
4096 const struct nft_set *set, int event,
4097 gfp_t gfp_flags)
20a69341 4098{
d59d2f82 4099 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4100 u32 portid = ctx->portid;
6fb721cf
PNA		 4101 struct sk_buff *skb;
4102 u16 flags = 0;
20a69341
PM		 4103 int err;
4104
128ad332
PNA		 4105 if (!ctx->report &&
4106 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4107 return;
20a69341 4108
31f8441c 4109 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4110 if (skb == NULL)
4111 goto err;
4112
6fb721cf
PNA		 4113 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4114 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4115
4116 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4117 if (err < 0) {
4118 kfree_skb(skb);
4119 goto err;
4120 }
4121
0854db2a 4122 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4123 return;
20a69341 4124err:
25e94a99 4125 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4126}
4127
5b96af77 4128static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4129{
4130 const struct nft_set *set;
4131 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4132 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4133 struct net *net = sock_net(skb->sk);
5b96af77 4134 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4135 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4136
4137 if (cb->args[1])
4138 return skb->len;
4139
e688a7f8 4140 rcu_read_lock();
d59d2f82 4141 nft_net = nft_pernet(net);
34002783 4142 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4143
0854db2a 4144 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4145 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4146 ctx->family != table->family)
36596dad
PNA		 4147 continue;
4148
4149 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4150 continue;
4151
36596dad
PNA		 4152 if (cur_table) {
4153 if (cur_table != table)
c9c8e485
PNA		 4154 continue;
4155
36596dad 4156 cur_table = NULL;
c9c8e485 4157 }
36596dad
PNA		 4158 idx = 0;
4159 list_for_each_entry_rcu(set, &table->sets, list) {
4160 if (idx < s_idx)
4161 goto cont;
4162 if (!nft_is_active(net, set))
4163 goto cont;
5b96af77 4164
36596dad
PNA		 4165 ctx_set = *ctx;
4166 ctx_set.table = table;
98319cb9 4167 ctx_set.family = table->family;
c9c8e485 4168
36596dad
PNA		 4169 if (nf_tables_fill_set(skb, &ctx_set, set,
4170 NFT_MSG_NEWSET,
4171 NLM_F_MULTI) < 0) {
4172 cb->args[0] = idx;
4173 cb->args[2] = (unsigned long) table;
4174 goto done;
c9c8e485 4175 }
36596dad 4176 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4177cont:
36596dad 4178 idx++;
c9c8e485 4179 }
36596dad
PNA		 4180 if (s_idx)
4181 s_idx = 0;
c9c8e485
PNA		 4182 }
4183 cb->args[1] = 1;
4184done:
e688a7f8 4185 rcu_read_unlock();
c9c8e485
PNA		 4186 return skb->len;
4187}
4188
90fd131a
FW		 4189static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4190{
4191 struct nft_ctx *ctx_dump = NULL;
4192
4193 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4194 if (ctx_dump == NULL)
4195 return -ENOMEM;
4196
4197 cb->data = ctx_dump;
4198 return 0;
4199}
4200
5b96af77 4201static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4202{
5b96af77
PNA		 4203 kfree(cb->data);
4204 return 0;
20a69341
PM		 4205}
4206
d9adf22a 4207/* called with rcu_read_lock held */
797d4980
PNA		 4208static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4209 const struct nlattr * const nla[])
20a69341 4210{
797d4980
PNA		 4211 struct netlink_ext_ack *extack = info->extack;
4212 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4213 u8 family = info->nfmsg->nfgen_family;
4214 struct nft_table *table = NULL;
797d4980 4215 struct net *net = info->net;
20a69341 4216 const struct nft_set *set;
20a69341 4217 struct sk_buff *skb2;
797d4980 4218 struct nft_ctx ctx;
20a69341
PM		 4219 int err;
4220
67086651
PNA		 4221 if (nla[NFTA_SET_TABLE]) {
4222 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4223 genmask, 0);
4224 if (IS_ERR(table)) {
4225 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4226 return PTR_ERR(table);
4227 }
4228 }
4229
4230 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4231
797d4980 4232 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4233 struct netlink_dump_control c = {
90fd131a 4234 .start = nf_tables_dump_sets_start,
20a69341 4235 .dump = nf_tables_dump_sets,
5b96af77 4236 .done = nf_tables_dump_sets_done,
90fd131a 4237 .data = &ctx,
d9adf22a 4238 .module = THIS_MODULE,
20a69341 4239 };
5b96af77 4240
797d4980 4241 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4242 }
4243
c9c8e485 4244 /* Only accept unspec with dump */
ef4b65e5 4245 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4246 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4247 if (!nla[NFTA_SET_TABLE])
4248 return -EINVAL;
c9c8e485 4249
67086651 4250 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341
PM		 4251 if (IS_ERR(set))
4252 return PTR_ERR(set);
4253
d9adf22a 4254 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4255 if (skb2 == NULL)
4256 return -ENOMEM;
4257
4258 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4259 if (err < 0)
ee921183 4260 goto err_fill_set_info;
20a69341 4261
ee921183 4262 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4263
ee921183 4264err_fill_set_info:
20a69341
PM		 4265 kfree_skb(skb2);
4266 return err;
4267}
4268
f3a2181e
SB		 4269static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4270 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4271};
4272
4273static int nft_set_desc_concat_parse(const struct nlattr *attr,
4274 struct nft_set_desc *desc)
4275{
4276 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4277 u32 len;
4278 int err;
4279
fecf31ee
PNA		 4280 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4281 return -E2BIG;
4282
f3a2181e
SB		 4283 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4284 nft_concat_policy, NULL);
4285 if (err < 0)
4286 return err;
4287
4288 if (!tb[NFTA_SET_FIELD_LEN])
4289 return -EINVAL;
4290
4291 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4292 if (!len || len > U8_MAX)
4293 return -EINVAL;
f3a2181e
SB		 4294
4295 desc->field_len[desc->field_count++] = len;
4296
4297 return 0;
4298}
4299
4300static int nft_set_desc_concat(struct nft_set_desc *desc,
4301 const struct nlattr *nla)
4302{
4303 struct nlattr *attr;
fecf31ee
PNA		 4304 u32 num_regs = 0;
4305 int rem, err, i;
f3a2181e
SB		 4306
4307 nla_for_each_nested(attr, nla, rem) {
4308 if (nla_type(attr) != NFTA_LIST_ELEM)
4309 return -EINVAL;
4310
4311 err = nft_set_desc_concat_parse(attr, desc);
4312 if (err < 0)
4313 return err;
4314 }
4315
fecf31ee
PNA		 4316 for (i = 0; i < desc->field_count; i++)
4317 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4318
4319 if (num_regs > NFT_REG32_COUNT)
4320 return -E2BIG;
4321
f3a2181e
SB		 4322 return 0;
4323}
4324
f7e840ee 4325static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4326 const struct nlattr *nla)
4327{
4328 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4329 int err;
4330
8cb08174
JB		 4331 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4332 nft_set_desc_policy, NULL);
c50b960c
PM		 4333 if (err < 0)
4334 return err;
4335
4336 if (da[NFTA_SET_DESC_SIZE] != NULL)
4337 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4338 if (da[NFTA_SET_DESC_CONCAT])
4339 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4340
f3a2181e 4341 return err;
c50b960c
PM		 4342}
4343
7dab8ee3
PNA		 4344static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4345 const struct nlattr * const nla[])
20a69341 4346{
7dab8ee3
PNA		 4347 u32 ktype, dtype, flags, policy, gc_int, objtype;
4348 struct netlink_ext_ack *extack = info->extack;
4349 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4350 u8 family = info->nfmsg->nfgen_family;
20a69341 4351 const struct nft_set_ops *ops;
65038428 4352 struct nft_expr *expr = NULL;
7dab8ee3
PNA		 4353 struct net *net = info->net;
4354 struct nft_set_desc desc;
20a69341 4355 struct nft_table *table;
7dab8ee3 4356 unsigned char *udata;
20a69341
PM		 4357 struct nft_set *set;
4358 struct nft_ctx ctx;
6c8774a9 4359 size_t alloc_size;
761da293 4360 u64 timeout;
7dab8ee3
PNA		 4361 char *name;
4362 int err, i;
e6d8ecac 4363 u16 udlen;
7dab8ee3 4364 u64 size;
20a69341
PM		 4365
4366 if (nla[NFTA_SET_TABLE] == NULL ||
4367 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4368 nla[NFTA_SET_KEY_LEN] == NULL ||
4369 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4370 return -EINVAL;
4371
c50b960c
PM		 4372 memset(&desc, 0, sizeof(desc));
4373
20a69341
PM		 4374 ktype = NFT_DATA_VALUE;
4375 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
4376 ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4377 if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
4378 return -EINVAL;
4379 }
4380
c50b960c 4381 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4382 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4383 return -EINVAL;
4384
4385 flags = 0;
4386 if (nla[NFTA_SET_FLAGS] != NULL) {
4387 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4388 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4389 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4390 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4391 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4392 return -EOPNOTSUPP;
8aeff920 4393 /* Only one of these operations is supported */
acab7131
FW		 4394 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4395 (NFT_SET_MAP | NFT_SET_OBJECT))
4396 return -EOPNOTSUPP;
4397 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4398 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4399 return -EOPNOTSUPP;
20a69341
PM		 4400 }
4401
4402 dtype = 0;
20a69341
PM		 4403 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4404 if (!(flags & NFT_SET_MAP))
4405 return -EINVAL;
4406
4407 dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4408 if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4409 dtype != NFT_DATA_VERDICT)
4410 return -EINVAL;
4411
4412 if (dtype != NFT_DATA_VERDICT) {
4413 if (nla[NFTA_SET_DATA_LEN] == NULL)
4414 return -EINVAL;
c50b960c 4415 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4416 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4417 return -EINVAL;
4418 } else
7d740264 4419 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 4420 } else if (flags & NFT_SET_MAP)
4421 return -EINVAL;
4422
8aeff920
PNA		 4423 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4424 if (!(flags & NFT_SET_OBJECT))
4425 return -EINVAL;
4426
4427 objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4428 if (objtype == NFT_OBJECT_UNSPEC ||
4429 objtype > NFT_OBJECT_MAX)
d9583cdf 4430 return -EOPNOTSUPP;
8aeff920
PNA		 4431 } else if (flags & NFT_SET_OBJECT)
4432 return -EINVAL;
4433 else
4434 objtype = NFT_OBJECT_UNSPEC;
4435
761da293
PM		 4436 timeout = 0;
4437 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4438 if (!(flags & NFT_SET_TIMEOUT))
4439 return -EINVAL;
8e1102d5
FW		 4440
4441 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &timeout);
4442 if (err)
4443 return err;
761da293
PM		 4444 }
4445 gc_int = 0;
4446 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4447 if (!(flags & NFT_SET_TIMEOUT))
4448 return -EINVAL;
4449 gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
4450 }
4451
c50b960c
PM		 4452 policy = NFT_SET_POL_PERFORMANCE;
4453 if (nla[NFTA_SET_POLICY] != NULL)
4454 policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
4455
4456 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 4457 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 4458 if (err < 0)
4459 return err;
1b6345d4
PNA		 4460
4461 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4462 return -EINVAL;
4463 } else if (flags & NFT_SET_CONCAT) {
4464 return -EINVAL;
c50b960c
PM		 4465 }
4466
48b0ae04 4467 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 4468 desc.expr = true;
4469
6001a930
PNA		 4470 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4471 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4472 if (IS_ERR(table)) {
4473 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 4474 return PTR_ERR(table);
36dd1bcc 4475 }
20a69341 4476
7dab8ee3 4477 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4478
cac20fcd 4479 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 4480 if (IS_ERR(set)) {
36dd1bcc
PNA		 4481 if (PTR_ERR(set) != -ENOENT) {
4482 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4483 return PTR_ERR(set);
36dd1bcc 4484 }
1a28ad74 4485 } else {
7dab8ee3 4486 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 4487 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4488 return -EEXIST;
36dd1bcc 4489 }
7dab8ee3 4490 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 4491 return -EOPNOTSUPP;
36dd1bcc 4492
20a69341
PM		 4493 return 0;
4494 }
4495
7dab8ee3 4496 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 4497 return -ENOENT;
4498
2b664957 4499 ops = nft_select_set_ops(&ctx, nla, &desc, policy);
20a69341
PM		 4500 if (IS_ERR(ops))
4501 return PTR_ERR(ops);
4502
e6d8ecac
CFG		 4503 udlen = 0;
4504 if (nla[NFTA_SET_USERDATA])
4505 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4506
20a69341
PM		 4507 size = 0;
4508 if (ops->privsize != NULL)
347b408d 4509 size = ops->privsize(nla, &desc);
6c8774a9 4510 alloc_size = sizeof(*set) + size + udlen;
45928afe 4511 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 4512 return -ENOMEM;
33758c89 4513 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
24d19826
FW		 4514 if (!set)
4515 return -ENOMEM;
20a69341 4516
33758c89 4517 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 4518 if (!name) {
4519 err = -ENOMEM;
65038428 4520 goto err_set_name;
38745490
PS		 4521 }
4522
20a69341 4523 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 4524 kfree(name);
20a69341 4525 if (err < 0)
ad9f151e
PNA		 4526 goto err_set_name;
4527
4528 udata = NULL;
4529 if (udlen) {
4530 udata = set->data + size;
4531 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
4532 }
4533
4534 INIT_LIST_HEAD(&set->bindings);
4535 INIT_LIST_HEAD(&set->catchall_list);
4536 set->table = table;
4537 write_pnet(&set->net, net);
4538 set->ops = ops;
4539 set->ktype = ktype;
4540 set->klen = desc.klen;
4541 set->dtype = dtype;
4542 set->objtype = objtype;
4543 set->dlen = desc.dlen;
4544 set->flags = flags;
4545 set->size = desc.size;
4546 set->policy = policy;
4547 set->udlen = udlen;
4548 set->udata = udata;
4549 set->timeout = timeout;
4550 set->gc_int = gc_int;
4551
4552 set->field_count = desc.field_count;
4553 for (i = 0; i < desc.field_count; i++)
4554 set->field_len[i] = desc.field_len[i];
4555
4556 err = ops->init(set, &desc, nla);
4557 if (err < 0)
4558 goto err_set_init;
65038428
PNA		 4559
4560 if (nla[NFTA_SET_EXPR]) {
4561 expr = nft_set_elem_expr_alloc(&ctx, set, nla[NFTA_SET_EXPR]);
4562 if (IS_ERR(expr)) {
4563 err = PTR_ERR(expr);
ad9f151e 4564 goto err_set_expr_alloc;
65038428 4565 }
8cfd9b0f
PNA		 4566 set->exprs[0] = expr;
4567 set->num_exprs++;
48b0ae04
PNA		 4568 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4569 struct nft_expr *expr;
4570 struct nlattr *tmp;
4571 int left;
4572
b4e70d8d
PNA		 4573 if (!(flags & NFT_SET_EXPR)) {
4574 err = -EINVAL;
ad9f151e 4575 goto err_set_expr_alloc;
b4e70d8d 4576 }
48b0ae04
PNA		 4577 i = 0;
4578 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4579 if (i == NFT_SET_EXPR_MAX) {
4580 err = -E2BIG;
ad9f151e 4581 goto err_set_expr_alloc;
48b0ae04
PNA		 4582 }
4583 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4584 err = -EINVAL;
ad9f151e 4585 goto err_set_expr_alloc;
48b0ae04
PNA		 4586 }
4587 expr = nft_set_elem_expr_alloc(&ctx, set, tmp);
4588 if (IS_ERR(expr)) {
4589 err = PTR_ERR(expr);
ad9f151e 4590 goto err_set_expr_alloc;
48b0ae04
PNA		 4591 }
4592 set->exprs[i++] = expr;
4593 set->num_exprs++;
4594 }
65038428 4595 }
20a69341 4596
3ecbfd65 4597 set->handle = nf_tables_alloc_handle(table);
20a69341 4598
958bee14 4599 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 4600 if (err < 0)
ad9f151e 4601 goto err_set_expr_alloc;
20a69341 4602
e688a7f8 4603 list_add_tail_rcu(&set->list, &table->sets);
4fefee57 4604 table->use++;
20a69341
PM		 4605 return 0;
4606
ad9f151e 4607err_set_expr_alloc:
8cfd9b0f
PNA		 4608 for (i = 0; i < set->num_exprs; i++)
4609 nft_expr_destroy(&ctx, set->exprs[i]);
ad9f151e
PNA		 4610
4611 ops->destroy(set);
4612err_set_init:
2f6adf48 4613 kfree(set->name);
65038428 4614err_set_name:
1ff75a3e 4615 kvfree(set);
20a69341
PM		 4616 return err;
4617}
4618
aaa31047
PNA		 4619struct nft_set_elem_catchall {
4620 struct list_head list;
4621 struct rcu_head rcu;
4622 void *elem;
4623};
4624
4625static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
4626 struct nft_set *set)
4627{
0f7d9b31 4628 struct nft_set_elem_catchall *next, *catchall;
aaa31047 4629
0f7d9b31 4630 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047
PNA		 4631 list_del_rcu(&catchall->list);
4632 nft_set_elem_destroy(set, catchall->elem, true);
ae089831 4633 kfree_rcu(catchall, rcu);
aaa31047
PNA		 4634 }
4635}
4636
0c2a85ed 4637static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 4638{
8cfd9b0f
PNA		 4639 int i;
4640
273fe3f1
PNA		 4641 if (WARN_ON(set->use > 0))
4642 return;
4643
8cfd9b0f
PNA		 4644 for (i = 0; i < set->num_exprs; i++)
4645 nft_expr_destroy(ctx, set->exprs[i]);
65038428 4646
20a69341 4647 set->ops->destroy(set);
aaa31047 4648 nft_set_catchall_destroy(ctx, set);
38745490 4649 kfree(set->name);
1ff75a3e 4650 kvfree(set);
20a69341
PM		 4651}
4652
7dab8ee3
PNA		 4653static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
4654 const struct nlattr * const nla[])
20a69341 4655{
7dab8ee3
PNA		 4656 struct netlink_ext_ack *extack = info->extack;
4657 u8 genmask = nft_genmask_next(info->net);
67086651 4658 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 4659 struct net *net = info->net;
36dd1bcc 4660 const struct nlattr *attr;
67086651 4661 struct nft_table *table;
20a69341
PM		 4662 struct nft_set *set;
4663 struct nft_ctx ctx;
20a69341 4664
ef4b65e5 4665 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 4666 return -EAFNOSUPPORT;
20a69341 4667
67086651
PNA		 4668 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4669 genmask, NETLINK_CB(skb).portid);
4670 if (IS_ERR(table)) {
4671 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4672 return PTR_ERR(table);
4673 }
20a69341 4674
36dd1bcc
PNA		 4675 if (nla[NFTA_SET_HANDLE]) {
4676 attr = nla[NFTA_SET_HANDLE];
67086651 4677 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 4678 } else {
4679 attr = nla[NFTA_SET_NAME];
67086651 4680 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 4681 }
a8278400 4682
36dd1bcc
PNA		 4683 if (IS_ERR(set)) {
4684 NL_SET_BAD_ATTR(extack, attr);
4685 return PTR_ERR(set);
4686 }
273fe3f1 4687 if (set->use ||
7dab8ee3
PNA		 4688 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
4689 atomic_read(&set->nelems) > 0)) {
36dd1bcc 4690 NL_SET_BAD_ATTR(extack, attr);
20a69341 4691 return -EBUSY;
36dd1bcc 4692 }
20a69341 4693
67086651
PNA		 4694 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4695
ee01d542 4696 return nft_delset(&ctx, set);
20a69341
PM		 4697}
4698
345023b0
PNA		 4699static int nft_validate_register_store(const struct nft_ctx *ctx,
4700 enum nft_registers reg,
4701 const struct nft_data *data,
4702 enum nft_data_types type,
4703 unsigned int len);
4704
97c976d6
PNA		 4705static int nft_setelem_data_validate(const struct nft_ctx *ctx,
4706 struct nft_set *set,
4707 struct nft_set_elem *elem)
20a69341 4708{
fe2811eb 4709 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 4710 enum nft_registers dreg;
4711
4712 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 4713 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
4714 set->dtype == NFT_DATA_VERDICT ?
4715 NFT_DATA_VERDICT : NFT_DATA_VALUE,
4716 set->dlen);
20a69341
PM		 4717}
4718
97c976d6
PNA		 4719static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
4720 struct nft_set *set,
4721 const struct nft_set_iter *iter,
4722 struct nft_set_elem *elem)
4723{
4724 return nft_setelem_data_validate(ctx, set, elem);
4725}
4726
aaa31047
PNA		 4727static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
4728 struct nft_set *set)
4729{
4730 u8 genmask = nft_genmask_next(ctx->net);
4731 struct nft_set_elem_catchall *catchall;
4732 struct nft_set_elem elem;
4733 struct nft_set_ext *ext;
4734 int ret = 0;
4735
4736 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
4737 ext = nft_set_elem_ext(set, catchall->elem);
4738 if (!nft_set_elem_active(ext, genmask))
4739 continue;
4740
4741 elem.priv = catchall->elem;
4742 ret = nft_setelem_data_validate(ctx, set, &elem);
4743 if (ret < 0)
4744 break;
4745 }
4746
4747 return ret;
4748}
4749
20a69341
PM		 4750int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
4751 struct nft_set_binding *binding)
4752{
4753 struct nft_set_binding *i;
4754 struct nft_set_iter iter;
4755
273fe3f1
PNA		 4756 if (set->use == UINT_MAX)
4757 return -EOVERFLOW;
4758
408070d6 4759 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 4760 return -EBUSY;
4761
11113e19 4762 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 4763 /* If the set is already bound to the same chain all
4764 * jumps are already validated for that chain.
4765 */
4766 list_for_each_entry(i, &set->bindings, list) {
a4684402 4767 if (i->flags & NFT_SET_MAP &&
11113e19 4768 i->chain == binding->chain)
20a69341
PM		 4769 goto bind;
4770 }
4771
8588ac09 4772 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 4773 iter.skip = 0;
4774 iter.count = 0;
4775 iter.err = 0;
4776 iter.fn = nf_tables_bind_check_setelem;
4777
4778 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 4779 if (!iter.err)
4780 iter.err = nft_set_catchall_bind_check(ctx, set);
4781
a02f4248 4782 if (iter.err < 0)
20a69341 4783 return iter.err;
20a69341
PM		 4784 }
4785bind:
4786 binding->chain = ctx->chain;
e688a7f8 4787 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585 4788 nft_set_trans_bind(ctx, set);
273fe3f1 4789 set->use++;
f6ac8585 4790
20a69341
PM		 4791 return 0;
4792}
63aea290 4793EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 4794
3b0a081d
FW		 4795static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
4796 struct nft_set_binding *binding, bool event)
20a69341 4797{
e688a7f8 4798 list_del_rcu(&binding->list);
20a69341 4799
f6ac8585 4800 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 4801 list_del_rcu(&set->list);
f6ac8585
PNA		 4802 if (event)
4803 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
4804 GFP_KERNEL);
4805 }
20a69341
PM		 4806}
4807
273fe3f1
PNA		 4808void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
4809 struct nft_set_binding *binding,
4810 enum nft_trans_phase phase)
4811{
4812 switch (phase) {
4813 case NFT_TRANS_PREPARE:
4814 set->use--;
4815 return;
4816 case NFT_TRANS_ABORT:
4817 case NFT_TRANS_RELEASE:
4818 set->use--;
954d8297 4819 fallthrough;
273fe3f1
PNA		 4820 default:
4821 nf_tables_unbind_set(ctx, set, binding,
4822 phase == NFT_TRANS_COMMIT);
4823 }
4824}
4825EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
4826
cd5125d8
FW		 4827void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
4828{
f6ac8585 4829 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 4830 nft_set_destroy(ctx, set);
cd5125d8
FW		 4831}
4832EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
4833
3ac4c07a
PM		 4834const struct nft_set_ext_type nft_set_ext_types[] = {
4835 [NFT_SET_EXT_KEY] = {
7d740264 4836 .align = __alignof__(u32),
3ac4c07a
PM		 4837 },
4838 [NFT_SET_EXT_DATA] = {
7d740264 4839 .align = __alignof__(u32),
3ac4c07a 4840 },
563125a7
PNA		 4841 [NFT_SET_EXT_EXPRESSIONS] = {
4842 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 4843 },
8aeff920
PNA		 4844 [NFT_SET_EXT_OBJREF] = {
4845 .len = sizeof(struct nft_object *),
4846 .align = __alignof__(struct nft_object *),
4847 },
3ac4c07a
PM		 4848 [NFT_SET_EXT_FLAGS] = {
4849 .len = sizeof(u8),
4850 .align = __alignof__(u8),
4851 },
c3e1b005
PM		 4852 [NFT_SET_EXT_TIMEOUT] = {
4853 .len = sizeof(u64),
4854 .align = __alignof__(u64),
4855 },
4856 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 4857 .len = sizeof(u64),
4858 .align = __alignof__(u64),
c3e1b005 4859 },
68e942e8
PM		 4860 [NFT_SET_EXT_USERDATA] = {
4861 .len = sizeof(struct nft_userdata),
4862 .align = __alignof__(struct nft_userdata),
4863 },
7b225d0b
PNA		 4864 [NFT_SET_EXT_KEY_END] = {
4865 .align = __alignof__(u32),
4866 },
3ac4c07a 4867};
3ac4c07a 4868
20a69341
PM		 4869/*
4870 * Set elements
4871 */
4872
4873static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
4874 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
4875 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
4876 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 4877 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 4878 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 4879 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
4880 .len = NFT_USERDATA_MAXLEN },
467697d2 4881 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 4882 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
4883 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 4884 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
48b0ae04 4885 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
20a69341
PM		 4886};
4887
4888static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 4889 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
4890 .len = NFT_TABLE_MAXNAMELEN - 1 },
4891 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
4892 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341 4893 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
958bee14 4894 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 4895};
4896
563125a7
PNA		 4897static int nft_set_elem_expr_dump(struct sk_buff *skb,
4898 const struct nft_set *set,
4899 const struct nft_set_ext *ext)
4900{
4901 struct nft_set_elem_expr *elem_expr;
4902 u32 size, num_exprs = 0;
4903 struct nft_expr *expr;
48b0ae04 4904 struct nlattr *nest;
563125a7
PNA		 4905
4906 elem_expr = nft_set_ext_expr(ext);
4907 nft_setelem_expr_foreach(expr, elem_expr, size)
4908 num_exprs++;
4909
4910 if (num_exprs == 1) {
4911 expr = nft_setelem_expr_at(elem_expr, 0);
4912 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr) < 0)
4913 return -1;
4914
4915 return 0;
48b0ae04
PNA		 4916 } else if (num_exprs > 1) {
4917 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
4918 if (nest == NULL)
4919 goto nla_put_failure;
563125a7 4920
48b0ae04
PNA		 4921 nft_setelem_expr_foreach(expr, elem_expr, size) {
4922 expr = nft_setelem_expr_at(elem_expr, size);
4923 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
4924 goto nla_put_failure;
4925 }
4926 nla_nest_end(skb, nest);
4927 }
563125a7 4928 return 0;
48b0ae04
PNA		 4929
4930nla_put_failure:
4931 return -1;
563125a7
PNA		 4932}
4933
20a69341
PM		 4934static int nf_tables_fill_setelem(struct sk_buff *skb,
4935 const struct nft_set *set,
4936 const struct nft_set_elem *elem)
4937{
fe2811eb 4938 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 4939 unsigned char *b = skb_tail_pointer(skb);
4940 struct nlattr *nest;
4941
ae0be8de 4942 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 4943 if (nest == NULL)
4944 goto nla_put_failure;
4945
aaa31047
PNA		 4946 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
4947 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 4948 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 4949 goto nla_put_failure;
4950
7b225d0b
PNA		 4951 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
4952 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
4953 NFT_DATA_VALUE, set->klen) < 0)
4954 goto nla_put_failure;
4955
fe2811eb
PM		 4956 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
4957 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 4958 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
4959 set->dlen) < 0)
4960 goto nla_put_failure;
4961
563125a7
PNA		 4962 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
4963 nft_set_elem_expr_dump(skb, set, ext))
f25ad2e9
PM		 4964 goto nla_put_failure;
4965
8aeff920
PNA		 4966 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
4967 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 4968 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 4969 goto nla_put_failure;
4970
fe2811eb
PM		 4971 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
4972 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
4973 htonl(*nft_set_ext_flags(ext))))
4974 goto nla_put_failure;
20a69341 4975
c3e1b005
PM		 4976 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
4977 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
8e1102d5 4978 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
b46f6ded 4979 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 4980 goto nla_put_failure;
4981
4982 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 4983 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 4984
4985 expires = *nft_set_ext_expiration(ext);
8e1102d5 4986 if (time_before64(now, expires))
c3e1b005
PM		 4987 expires -= now;
4988 else
4989 expires = 0;
4990
4991 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 4992 nf_jiffies64_to_msecs(expires),
b46f6ded 4993 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 4994 goto nla_put_failure;
4995 }
4996
68e942e8
PM		 4997 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
4998 struct nft_userdata *udata;
4999
5000 udata = nft_set_ext_userdata(ext);
5001 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5002 udata->len + 1, udata->data))
5003 goto nla_put_failure;
5004 }
5005
20a69341
PM		 5006 nla_nest_end(skb, nest);
5007 return 0;
5008
5009nla_put_failure:
5010 nlmsg_trim(skb, b);
5011 return -EMSGSIZE;
5012}
5013
5014struct nft_set_dump_args {
5015 const struct netlink_callback *cb;
5016 struct nft_set_iter iter;
5017 struct sk_buff *skb;
5018};
5019
5020static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5021 struct nft_set *set,
20a69341 5022 const struct nft_set_iter *iter,
de70185d 5023 struct nft_set_elem *elem)
20a69341
PM		 5024{
5025 struct nft_set_dump_args *args;
5026
5027 args = container_of(iter, struct nft_set_dump_args, iter);
5028 return nf_tables_fill_setelem(args->skb, set, elem);
5029}
5030
fa803605
LZ		 5031struct nft_set_dump_ctx {
5032 const struct nft_set *set;
5033 struct nft_ctx ctx;
5034};
5035
aaa31047
PNA		 5036static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5037 const struct nft_set *set)
5038{
5039 struct nft_set_elem_catchall *catchall;
5040 u8 genmask = nft_genmask_cur(net);
5041 struct nft_set_elem elem;
5042 struct nft_set_ext *ext;
5043 int ret = 0;
5044
5045 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5046 ext = nft_set_elem_ext(set, catchall->elem);
5047 if (!nft_set_elem_active(ext, genmask) ||
5048 nft_set_elem_expired(ext))
5049 continue;
5050
5051 elem.priv = catchall->elem;
5052 ret = nf_tables_fill_setelem(skb, set, &elem);
5053 break;
5054 }
5055
5056 return ret;
5057}
5058
20a69341
PM		 5059static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5060{
fa803605 5061 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5062 struct net *net = sock_net(skb->sk);
0854db2a 5063 struct nftables_pernet *nft_net;
fa803605 5064 struct nft_table *table;
de70185d 5065 struct nft_set *set;
20a69341 5066 struct nft_set_dump_args args;
fa803605 5067 bool set_found = false;
20a69341
PM		 5068 struct nlmsghdr *nlh;
5069 struct nlattr *nest;
5070 u32 portid, seq;
fa803605 5071 int event;
20a69341 5072
fa803605 5073 rcu_read_lock();
d59d2f82 5074 nft_net = nft_pernet(net);
34002783
PNA		 5075 cb->seq = READ_ONCE(nft_net->base_seq);
5076
0854db2a 5077 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5078 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5079 dump_ctx->ctx.family != table->family)
fa803605 5080 continue;
20a69341 5081
36596dad
PNA		 5082 if (table != dump_ctx->ctx.table)
5083 continue;
20a69341 5084
36596dad
PNA		 5085 list_for_each_entry_rcu(set, &table->sets, list) {
5086 if (set == dump_ctx->set) {
5087 set_found = true;
5088 break;
fa803605 5089 }
fa803605
LZ		 5090 }
5091 break;
5092 }
5093
5094 if (!set_found) {
5095 rcu_read_unlock();
5096 return -ENOENT;
5097 }
20a69341 5098
dedb67c4 5099 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5100 portid = NETLINK_CB(cb->skb).portid;
5101 seq = cb->nlh->nlmsg_seq;
5102
19c28b13
PNA		 5103 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5104 table->family, NFNETLINK_V0, nft_base_seq(net));
5105 if (!nlh)
20a69341
PM		 5106 goto nla_put_failure;
5107
fa803605 5108 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5109 goto nla_put_failure;
5110 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5111 goto nla_put_failure;
5112
ae0be8de 5113 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5114 if (nest == NULL)
5115 goto nla_put_failure;
5116
8588ac09
PNA		 5117 args.cb = cb;
5118 args.skb = skb;
fa803605 5119 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5120 args.iter.skip = cb->args[0];
5121 args.iter.count = 0;
5122 args.iter.err = 0;
5123 args.iter.fn = nf_tables_dump_setelem;
fa803605 5124 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5125
5126 if (!args.iter.err && args.iter.count == cb->args[0])
5127 args.iter.err = nft_set_catchall_dump(net, skb, set);
fa803605 5128 rcu_read_unlock();
20a69341
PM		 5129
5130 nla_nest_end(skb, nest);
5131 nlmsg_end(skb, nlh);
5132
5133 if (args.iter.err && args.iter.err != -EMSGSIZE)
5134 return args.iter.err;
5135 if (args.iter.count == cb->args[0])
5136 return 0;
5137
5138 cb->args[0] = args.iter.count;
5139 return skb->len;
5140
5141nla_put_failure:
fa803605 5142 rcu_read_unlock();
20a69341
PM		 5143 return -ENOSPC;
5144}
5145
90fd131a
FW		 5146static int nf_tables_dump_set_start(struct netlink_callback *cb)
5147{
5148 struct nft_set_dump_ctx *dump_ctx = cb->data;
5149
5150 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5151
5152 return cb->data ? 0 : -ENOMEM;
5153}
5154
fa803605
LZ		 5155static int nf_tables_dump_set_done(struct netlink_callback *cb)
5156{
5157 kfree(cb->data);
5158 return 0;
5159}
5160
d60ce62f
AB		 5161static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5162 const struct nft_ctx *ctx, u32 seq,
5163 u32 portid, int event, u16 flags,
5164 const struct nft_set *set,
5165 const struct nft_set_elem *elem)
5166{
d60ce62f
AB		 5167 struct nlmsghdr *nlh;
5168 struct nlattr *nest;
5169 int err;
5170
dedb67c4 5171 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5172 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5173 NFNETLINK_V0, nft_base_seq(ctx->net));
5174 if (!nlh)
d60ce62f
AB		 5175 goto nla_put_failure;
5176
d60ce62f
AB		 5177 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5178 goto nla_put_failure;
5179 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5180 goto nla_put_failure;
5181
ae0be8de 5182 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5183 if (nest == NULL)
5184 goto nla_put_failure;
5185
5186 err = nf_tables_fill_setelem(skb, set, elem);
5187 if (err < 0)
5188 goto nla_put_failure;
5189
5190 nla_nest_end(skb, nest);
5191
053c095a
JB		 5192 nlmsg_end(skb, nlh);
5193 return 0;
d60ce62f
AB		 5194
5195nla_put_failure:
5196 nlmsg_trim(skb, nlh);
5197 return -1;
5198}
5199
ba0e4d99
PNA		 5200static int nft_setelem_parse_flags(const struct nft_set *set,
5201 const struct nlattr *attr, u32 *flags)
5202{
5203 if (attr == NULL)
5204 return 0;
5205
5206 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5207 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5208 return -EOPNOTSUPP;
ba0e4d99
PNA		 5209 if (!(set->flags & NFT_SET_INTERVAL) &&
5210 *flags & NFT_SET_ELEM_INTERVAL_END)
5211 return -EINVAL;
fc0ae524
PNA		 5212 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5213 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5214 return -EINVAL;
ba0e4d99
PNA		 5215
5216 return 0;
5217}
5218
20a1452c
PNA		 5219static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5220 struct nft_data *key, struct nlattr *attr)
5221{
341b6941
PNA		 5222 struct nft_data_desc desc = {
5223 .type = NFT_DATA_VALUE,
5224 .size = NFT_DATA_VALUE_MAXLEN,
5225 .len = set->klen,
5226 };
20a1452c 5227
341b6941 5228 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5229}
5230
fdb9c405
PNA		 5231static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5232 struct nft_data_desc *desc,
5233 struct nft_data *data,
5234 struct nlattr *attr)
5235{
7e6bc1f6 5236 u32 dtype;
fdb9c405 5237
7e6bc1f6
PNA		 5238 if (set->dtype == NFT_DATA_VERDICT)
5239 dtype = NFT_DATA_VERDICT;
5240 else
5241 dtype = NFT_DATA_VALUE;
5242
341b6941
PNA		 5243 desc->type = dtype;
5244 desc->size = NFT_DATA_VALUE_MAXLEN;
5245 desc->len = set->dlen;
f323ef3a 5246 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5247
341b6941 5248 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5249}
5250
aaa31047
PNA		 5251static void *nft_setelem_catchall_get(const struct net *net,
5252 const struct nft_set *set)
5253{
5254 struct nft_set_elem_catchall *catchall;
5255 u8 genmask = nft_genmask_cur(net);
5256 struct nft_set_ext *ext;
5257 void *priv = NULL;
5258
5259 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5260 ext = nft_set_elem_ext(set, catchall->elem);
5261 if (!nft_set_elem_active(ext, genmask) ||
5262 nft_set_elem_expired(ext))
5263 continue;
5264
5265 priv = catchall->elem;
5266 break;
5267 }
5268
5269 return priv;
5270}
5271
5272static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5273 struct nft_set_elem *elem, u32 flags)
5274{
5275 void *priv;
5276
5277 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5278 priv = set->ops->get(ctx->net, set, elem, flags);
5279 if (IS_ERR(priv))
5280 return PTR_ERR(priv);
5281 } else {
5282 priv = nft_setelem_catchall_get(ctx->net, set);
5283 if (!priv)
5284 return -ENOENT;
5285 }
5286 elem->priv = priv;
5287
5288 return 0;
5289}
5290
ba0e4d99
PNA		 5291static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5292 const struct nlattr *attr)
5293{
5294 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5295 struct nft_set_elem elem;
5296 struct sk_buff *skb;
5297 uint32_t flags = 0;
ba0e4d99
PNA		 5298 int err;
5299
8cb08174
JB		 5300 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5301 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5302 if (err < 0)
5303 return err;
5304
ba0e4d99
PNA		 5305 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5306 if (err < 0)
5307 return err;
5308
aaa31047
PNA		 5309 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5310 return -EINVAL;
5311
5312 if (nla[NFTA_SET_ELEM_KEY]) {
5313 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5314 nla[NFTA_SET_ELEM_KEY]);
5315 if (err < 0)
5316 return err;
5317 }
ba0e4d99 5318
7b225d0b
PNA		 5319 if (nla[NFTA_SET_ELEM_KEY_END]) {
5320 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5321 nla[NFTA_SET_ELEM_KEY_END]);
5322 if (err < 0)
5323 return err;
5324 }
5325
aaa31047
PNA		 5326 err = nft_setelem_get(ctx, set, &elem, flags);
5327 if (err < 0)
5328 return err;
ba0e4d99
PNA		 5329
5330 err = -ENOMEM;
d9adf22a 5331 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 5332 if (skb == NULL)
ee921183 5333 return err;
ba0e4d99
PNA		 5334
5335 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5336 NFT_MSG_NEWSETELEM, 0, set, &elem);
5337 if (err < 0)
ee921183 5338 goto err_fill_setelem;
ba0e4d99 5339
ee921183 5340 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 5341
ee921183 5342err_fill_setelem:
ba0e4d99 5343 kfree_skb(skb);
ee921183 5344 return err;
ba0e4d99
PNA		 5345}
5346
d9adf22a 5347/* called with rcu_read_lock held */
797d4980
PNA		 5348static int nf_tables_getsetelem(struct sk_buff *skb,
5349 const struct nfnl_info *info,
5350 const struct nlattr * const nla[])
ba0e4d99 5351{
797d4980
PNA		 5352 struct netlink_ext_ack *extack = info->extack;
5353 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 5354 u8 family = info->nfmsg->nfgen_family;
797d4980 5355 struct net *net = info->net;
e2b750d7 5356 struct nft_table *table;
ba0e4d99
PNA		 5357 struct nft_set *set;
5358 struct nlattr *attr;
5359 struct nft_ctx ctx;
5360 int rem, err = 0;
5361
e2b750d7
PNA		 5362 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
5363 genmask, NETLINK_CB(skb).portid);
5364 if (IS_ERR(table)) {
5365 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5366 return PTR_ERR(table);
5367 }
ba0e4d99 5368
e2b750d7 5369 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
ba0e4d99
PNA		 5370 if (IS_ERR(set))
5371 return PTR_ERR(set);
5372
e2b750d7
PNA		 5373 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5374
797d4980 5375 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 5376 struct netlink_dump_control c = {
90fd131a 5377 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 5378 .dump = nf_tables_dump_set,
5379 .done = nf_tables_dump_set_done,
d9adf22a 5380 .module = THIS_MODULE,
ba0e4d99 5381 };
90fd131a
FW		 5382 struct nft_set_dump_ctx dump_ctx = {
5383 .set = set,
5384 .ctx = ctx,
5385 };
ba0e4d99 5386
90fd131a 5387 c.data = &dump_ctx;
797d4980 5388 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 5389 }
5390
5391 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5392 return -EINVAL;
5393
5394 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5395 err = nft_get_set_elem(&ctx, set, attr);
b53c1166
PNA		 5396 if (err < 0) {
5397 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 5398 break;
b53c1166 5399 }
ba0e4d99
PNA		 5400 }
5401
5402 return err;
5403}
5404
25e94a99
PNA		 5405static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5406 const struct nft_set *set,
5407 const struct nft_set_elem *elem,
6fb721cf 5408 int event)
d60ce62f 5409{
0854db2a 5410 struct nftables_pernet *nft_net;
128ad332
PNA		 5411 struct net *net = ctx->net;
5412 u32 portid = ctx->portid;
d60ce62f 5413 struct sk_buff *skb;
6fb721cf 5414 u16 flags = 0;
d60ce62f
AB		 5415 int err;
5416
128ad332 5417 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 5418 return;
d60ce62f 5419
d60ce62f
AB		 5420 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5421 if (skb == NULL)
5422 goto err;
5423
6fb721cf
PNA		 5424 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5425 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5426
d60ce62f
AB		 5427 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5428 set, elem);
5429 if (err < 0) {
5430 kfree_skb(skb);
5431 goto err;
5432 }
5433
d59d2f82 5434 nft_net = nft_pernet(net);
0854db2a 5435 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 5436 return;
d60ce62f 5437err:
25e94a99 5438 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 5439}
5440
60319eb1
PNA		 5441static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5442 int msg_type,
5443 struct nft_set *set)
5444{
5445 struct nft_trans *trans;
5446
5447 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5448 if (trans == NULL)
5449 return NULL;
5450
5451 nft_trans_elem_set(trans) = set;
5452 return trans;
5453}
5454
a7fc9368
PNA		 5455struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5456 const struct nft_set *set,
5457 const struct nlattr *attr)
5458{
5459 struct nft_expr *expr;
5460 int err;
5461
5462 expr = nft_expr_init(ctx, attr);
5463 if (IS_ERR(expr))
5464 return expr;
5465
5466 err = -EOPNOTSUPP;
a7fc9368
PNA		 5467 if (expr->ops->type->flags & NFT_EXPR_GC) {
5468 if (set->flags & NFT_SET_TIMEOUT)
5469 goto err_set_elem_expr;
5470 if (!set->ops->gc_init)
5471 goto err_set_elem_expr;
5472 set->ops->gc_init(set);
5473 }
5474
5475 return expr;
5476
5477err_set_elem_expr:
5478 nft_expr_destroy(ctx, expr);
5479 return ERR_PTR(err);
5480}
5481
34aae2c2
PNA		 5482static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
5483{
5484 len += nft_set_ext_types[id].len;
5485 if (len > tmpl->ext_len[id] ||
5486 len > U8_MAX)
5487 return -1;
5488
5489 return 0;
5490}
5491
5492static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
5493 void *to, const void *from, u32 len)
5494{
5495 if (nft_set_ext_check(tmpl, id, len) < 0)
5496 return -1;
5497
5498 memcpy(to, from, len);
5499
5500 return 0;
5501}
5502
22fe54d5
PM		 5503void *nft_set_elem_init(const struct nft_set *set,
5504 const struct nft_set_ext_tmpl *tmpl,
7b225d0b
PNA		 5505 const u32 *key, const u32 *key_end,
5506 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 5507{
5508 struct nft_set_ext *ext;
5509 void *elem;
5510
5511 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
5512 if (elem == NULL)
34aae2c2 5513 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 5514
5515 ext = nft_set_elem_ext(set, elem);
5516 nft_set_ext_init(ext, tmpl);
5517
34aae2c2
PNA		 5518 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5519 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
5520 nft_set_ext_key(ext), key, set->klen) < 0)
5521 goto err_ext_check;
5522
5523 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5524 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
5525 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
5526 goto err_ext_check;
5527
5528 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5529 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
5530 nft_set_ext_data(ext), data, set->dlen) < 0)
5531 goto err_ext_check;
5532
79ebb5bb
LGL		 5533 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5534 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
5535 if (expiration == 0)
5536 *nft_set_ext_expiration(ext) += timeout;
5537 }
c3e1b005
PM		 5538 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
5539 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 5540
5541 return elem;
34aae2c2
PNA		 5542
5543err_ext_check:
5544 kfree(elem);
5545
5546 return ERR_PTR(-EINVAL);
fe2811eb
PM		 5547}
5548
563125a7
PNA		 5549static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5550 struct nft_expr *expr)
475beb9c
PNA		 5551{
5552 if (expr->ops->destroy_clone) {
5553 expr->ops->destroy_clone(ctx, expr);
5554 module_put(expr->ops->type->owner);
5555 } else {
5556 nf_tables_expr_destroy(ctx, expr);
5557 }
5558}
5559
563125a7
PNA		 5560static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5561 struct nft_set_elem_expr *elem_expr)
5562{
5563 struct nft_expr *expr;
5564 u32 size;
5565
5566 nft_setelem_expr_foreach(expr, elem_expr, size)
5567 __nft_set_elem_expr_destroy(ctx, expr);
5568}
5569
61f9e292
LZ		 5570void nft_set_elem_destroy(const struct nft_set *set, void *elem,
5571 bool destroy_expr)
61edafbb
PM		 5572{
5573 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
3453c927
PNA		 5574 struct nft_ctx ctx = {
5575 .net = read_pnet(&set->net),
5576 .family = set->table->family,
5577 };
61edafbb 5578
59105446 5579 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 5580 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 5581 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 5582 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 5583 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
371ebcbb 5584
8aeff920
PNA		 5585 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
5586 (*nft_set_ext_obj(ext))->use--;
61edafbb
PM		 5587 kfree(elem);
5588}
5589EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
5590
f8bb7889
PNA		 5591/* Only called from commit path, nft_setelem_data_deactivate() already deals
5592 * with the refcounting from the preparation phase.
59105446 5593 */
3453c927
PNA		 5594static void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
5595 const struct nft_set *set, void *elem)
59105446
PNA		 5596{
5597 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5598
563125a7 5599 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 5600 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
5601
59105446
PNA		 5602 kfree(elem);
5603}
5604
fca05d4d
PNA		 5605int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
5606 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 5607{
5608 struct nft_expr *expr;
5609 int err, i, k;
5610
5611 for (i = 0; i < set->num_exprs; i++) {
42193ffd 5612 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 5613 if (!expr)
5614 goto err_expr;
5615
5616 err = nft_expr_clone(expr, set->exprs[i]);
5617 if (err < 0) {
c485c35f 5618 kfree(expr);
8cfd9b0f
PNA		 5619 goto err_expr;
5620 }
5621 expr_array[i] = expr;
5622 }
5623
5624 return 0;
5625
5626err_expr:
161b838e
CIK		 5627 for (k = i - 1; k >= 0; k--)
5628 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 5629
5630 return -ENOMEM;
5631}
5632
4d8f9065 5633static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 5634 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 5635 const struct nft_set_ext *ext,
5636 struct nft_expr *expr_array[],
5637 u32 num_exprs)
563125a7
PNA		 5638{
5639 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 5640 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 5641 struct nft_expr *expr;
5642 int i, err;
5643
34aae2c2
PNA		 5644 if (num_exprs == 0)
5645 return 0;
5646
5647 for (i = 0; i < num_exprs; i++)
5648 len += expr_array[i]->ops->size;
5649
5650 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
5651 return -EINVAL;
5652
4d8f9065
PNA		 5653 for (i = 0; i < num_exprs; i++) {
5654 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
5655 err = nft_expr_clone(expr, expr_array[i]);
5656 if (err < 0)
5657 goto err_elem_expr_setup;
5658
5659 elem_expr->size += expr_array[i]->ops->size;
5660 nft_expr_destroy(ctx, expr_array[i]);
5661 expr_array[i] = NULL;
5662 }
5663
5664 return 0;
5665
5666err_elem_expr_setup:
5667 for (; i < num_exprs; i++) {
5668 nft_expr_destroy(ctx, expr_array[i]);
5669 expr_array[i] = NULL;
5670 }
563125a7 5671
4d8f9065 5672 return -ENOMEM;
563125a7
PNA		 5673}
5674
aaa31047
PNA		 5675struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
5676 const struct nft_set *set)
5677{
5678 struct nft_set_elem_catchall *catchall;
5679 u8 genmask = nft_genmask_cur(net);
5680 struct nft_set_ext *ext;
5681
5682 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5683 ext = nft_set_elem_ext(set, catchall->elem);
5684 if (nft_set_elem_active(ext, genmask) &&
5685 !nft_set_elem_expired(ext))
5686 return ext;
5687 }
5688
5689 return NULL;
5690}
5691EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
5692
5693void *nft_set_catchall_gc(const struct nft_set *set)
5694{
5695 struct nft_set_elem_catchall *catchall, *next;
5696 struct nft_set_ext *ext;
5697 void *elem = NULL;
5698
5699 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5700 ext = nft_set_elem_ext(set, catchall->elem);
5701
5702 if (!nft_set_elem_expired(ext) ||
5703 nft_set_elem_mark_busy(ext))
5704 continue;
5705
5706 elem = catchall->elem;
5707 list_del_rcu(&catchall->list);
5708 kfree_rcu(catchall, rcu);
5709 break;
5710 }
5711
5712 return elem;
5713}
5714EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
5715
5716static int nft_setelem_catchall_insert(const struct net *net,
5717 struct nft_set *set,
5718 const struct nft_set_elem *elem,
5719 struct nft_set_ext **pext)
5720{
5721 struct nft_set_elem_catchall *catchall;
5722 u8 genmask = nft_genmask_next(net);
5723 struct nft_set_ext *ext;
5724
5725 list_for_each_entry(catchall, &set->catchall_list, list) {
5726 ext = nft_set_elem_ext(set, catchall->elem);
5727 if (nft_set_elem_active(ext, genmask)) {
5728 *pext = ext;
5729 return -EEXIST;
5730 }
5731 }
5732
5733 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
5734 if (!catchall)
5735 return -ENOMEM;
5736
5737 catchall->elem = elem->priv;
5738 list_add_tail_rcu(&catchall->list, &set->catchall_list);
5739
5740 return 0;
5741}
5742
5743static int nft_setelem_insert(const struct net *net,
5744 struct nft_set *set,
5745 const struct nft_set_elem *elem,
5746 struct nft_set_ext **ext, unsigned int flags)
5747{
5748 int ret;
5749
5750 if (flags & NFT_SET_ELEM_CATCHALL)
5751 ret = nft_setelem_catchall_insert(net, set, elem, ext);
5752 else
5753 ret = set->ops->insert(net, set, elem, ext);
5754
5755 return ret;
5756}
5757
5758static bool nft_setelem_is_catchall(const struct nft_set *set,
5759 const struct nft_set_elem *elem)
5760{
5761 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5762
5763 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5764 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
5765 return true;
5766
5767 return false;
5768}
5769
5770static void nft_setelem_activate(struct net *net, struct nft_set *set,
5771 struct nft_set_elem *elem)
5772{
5773 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5774
5775 if (nft_setelem_is_catchall(set, elem)) {
5776 nft_set_elem_change_active(net, set, ext);
5777 nft_set_elem_clear_busy(ext);
5778 } else {
5779 set->ops->activate(net, set, elem);
5780 }
5781}
5782
5783static int nft_setelem_catchall_deactivate(const struct net *net,
5784 struct nft_set *set,
5785 struct nft_set_elem *elem)
5786{
5787 struct nft_set_elem_catchall *catchall;
5788 struct nft_set_ext *ext;
5789
5790 list_for_each_entry(catchall, &set->catchall_list, list) {
5791 ext = nft_set_elem_ext(set, catchall->elem);
5792 if (!nft_is_active(net, ext) ||
5793 nft_set_elem_mark_busy(ext))
5794 continue;
5795
5796 kfree(elem->priv);
5797 elem->priv = catchall->elem;
5798 nft_set_elem_change_active(net, set, ext);
5799 return 0;
5800 }
5801
5802 return -ENOENT;
5803}
5804
5805static int __nft_setelem_deactivate(const struct net *net,
5806 struct nft_set *set,
5807 struct nft_set_elem *elem)
5808{
5809 void *priv;
5810
5811 priv = set->ops->deactivate(net, set, elem);
5812 if (!priv)
5813 return -ENOENT;
5814
5815 kfree(elem->priv);
5816 elem->priv = priv;
5817 set->ndeact++;
5818
5819 return 0;
5820}
5821
5822static int nft_setelem_deactivate(const struct net *net,
5823 struct nft_set *set,
5824 struct nft_set_elem *elem, u32 flags)
5825{
5826 int ret;
5827
5828 if (flags & NFT_SET_ELEM_CATCHALL)
5829 ret = nft_setelem_catchall_deactivate(net, set, elem);
5830 else
5831 ret = __nft_setelem_deactivate(net, set, elem);
5832
5833 return ret;
5834}
5835
5836static void nft_setelem_catchall_remove(const struct net *net,
5837 const struct nft_set *set,
5838 const struct nft_set_elem *elem)
5839{
5840 struct nft_set_elem_catchall *catchall, *next;
5841
5842 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5843 if (catchall->elem == elem->priv) {
5844 list_del_rcu(&catchall->list);
ae089831 5845 kfree_rcu(catchall, rcu);
aaa31047
PNA		 5846 break;
5847 }
5848 }
5849}
5850
5851static void nft_setelem_remove(const struct net *net,
5852 const struct nft_set *set,
5853 const struct nft_set_elem *elem)
5854{
5855 if (nft_setelem_is_catchall(set, elem))
5856 nft_setelem_catchall_remove(net, set, elem);
5857 else
5858 set->ops->remove(net, set, elem);
5859}
5860
88cccd90
PNA		 5861static bool nft_setelem_valid_key_end(const struct nft_set *set,
5862 struct nlattr **nla, u32 flags)
5863{
5864 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
5865 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
5866 if (flags & NFT_SET_ELEM_INTERVAL_END)
5867 return false;
5868 if (!nla[NFTA_SET_ELEM_KEY_END] &&
5869 !(flags & NFT_SET_ELEM_CATCHALL))
5870 return false;
5871 } else {
5872 if (nla[NFTA_SET_ELEM_KEY_END])
5873 return false;
5874 }
5875
5876 return true;
5877}
5878
60319eb1 5879static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 5880 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 5881{
8cfd9b0f 5882 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 5883 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 5884 u8 genmask = nft_genmask_next(ctx->net);
664899e8 5885 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 5886 struct nft_set_ext_tmpl tmpl;
c016c7e4 5887 struct nft_set_ext *ext, *ext2;
20a69341
PM		 5888 struct nft_set_elem elem;
5889 struct nft_set_binding *binding;
8aeff920 5890 struct nft_object *obj = NULL;
68e942e8 5891 struct nft_userdata *udata;
20a1452c 5892 struct nft_data_desc desc;
20a69341 5893 enum nft_registers dreg;
60319eb1 5894 struct nft_trans *trans;
c3e1b005 5895 u64 timeout;
79ebb5bb 5896 u64 expiration;
8cfd9b0f 5897 int err, i;
68e942e8 5898 u8 ulen;
20a69341 5899
8cb08174
JB		 5900 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5901 nft_set_elem_policy, NULL);
20a69341
PM		 5902 if (err < 0)
5903 return err;
5904
fe2811eb
PM		 5905 nft_set_ext_prepare(&tmpl);
5906
0e9091d6
PNA		 5907 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5908 if (err < 0)
5909 return err;
aaa31047
PNA		 5910
5911 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5912 return -EINVAL;
5913
c39ba4de
PNA		 5914 if (flags != 0) {
5915 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
5916 if (err < 0)
5917 return err;
5918 }
20a69341
PM		 5919
5920 if (set->flags & NFT_SET_MAP) {
5921 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 5922 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 5923 return -EINVAL;
5924 } else {
5925 if (nla[NFTA_SET_ELEM_DATA] != NULL)
5926 return -EINVAL;
5927 }
5928
5a2f3dc3
PNA		 5929 if (set->flags & NFT_SET_OBJECT) {
5930 if (!nla[NFTA_SET_ELEM_OBJREF] &&
5931 !(flags & NFT_SET_ELEM_INTERVAL_END))
5932 return -EINVAL;
5933 } else {
5934 if (nla[NFTA_SET_ELEM_OBJREF])
5935 return -EINVAL;
5936 }
5937
88cccd90
PNA		 5938 if (!nft_setelem_valid_key_end(set, nla, flags))
5939 return -EINVAL;
5940
bffc124b
PNA		 5941 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
5942 (nla[NFTA_SET_ELEM_DATA] ||
5943 nla[NFTA_SET_ELEM_OBJREF] ||
5944 nla[NFTA_SET_ELEM_TIMEOUT] ||
5945 nla[NFTA_SET_ELEM_EXPIRATION] ||
5946 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 5947 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 5948 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 5949 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 5950 return -EINVAL;
5951
c3e1b005
PM		 5952 timeout = 0;
5953 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
5954 if (!(set->flags & NFT_SET_TIMEOUT))
5955 return -EINVAL;
8e1102d5
FW		 5956 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
5957 &timeout);
5958 if (err)
5959 return err;
c3e1b005
PM		 5960 } else if (set->flags & NFT_SET_TIMEOUT) {
5961 timeout = set->timeout;
5962 }
5963
79ebb5bb
LGL		 5964 expiration = 0;
5965 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
5966 if (!(set->flags & NFT_SET_TIMEOUT))
5967 return -EINVAL;
5968 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
5969 &expiration);
5970 if (err)
5971 return err;
5972 }
5973
8cfd9b0f
PNA		 5974 if (nla[NFTA_SET_ELEM_EXPR]) {
5975 struct nft_expr *expr;
5976
664899e8 5977 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 5978 return -EOPNOTSUPP;
5979
40944452
PNA		 5980 expr = nft_set_elem_expr_alloc(ctx, set,
5981 nla[NFTA_SET_ELEM_EXPR]);
5982 if (IS_ERR(expr))
5983 return PTR_ERR(expr);
65038428 5984
8cfd9b0f 5985 expr_array[0] = expr;
664899e8 5986 num_exprs = 1;
65038428 5987
664899e8 5988 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 5989 err = -EOPNOTSUPP;
65038428 5990 goto err_set_elem_expr;
8cfd9b0f 5991 }
48b0ae04
PNA		 5992 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
5993 struct nft_expr *expr;
5994 struct nlattr *tmp;
5995 int left;
65038428 5996
48b0ae04
PNA		 5997 i = 0;
5998 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 5999 if (i == NFT_SET_EXPR_MAX ||
6000 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 6001 err = -E2BIG;
6002 goto err_set_elem_expr;
6003 }
6004 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6005 err = -EINVAL;
6006 goto err_set_elem_expr;
6007 }
6008 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6009 if (IS_ERR(expr)) {
6010 err = PTR_ERR(expr);
6011 goto err_set_elem_expr;
6012 }
6013 expr_array[i] = expr;
664899e8 6014 num_exprs++;
48b0ae04 6015
664899e8 6016 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6017 err = -EOPNOTSUPP;
6018 goto err_set_elem_expr;
6019 }
6020 i++;
6021 }
664899e8 6022 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6023 err = -EOPNOTSUPP;
65038428 6024 goto err_set_elem_expr;
48b0ae04 6025 }
8cfd9b0f
PNA		 6026 } else if (set->num_exprs > 0) {
6027 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6028 if (err < 0)
6029 goto err_set_elem_expr_clone;
664899e8
PNA		 6030
6031 num_exprs = set->num_exprs;
40944452
PNA		 6032 }
6033
aaa31047
PNA		 6034 if (nla[NFTA_SET_ELEM_KEY]) {
6035 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6036 nla[NFTA_SET_ELEM_KEY]);
6037 if (err < 0)
6038 goto err_set_elem_expr;
20a69341 6039
c39ba4de
PNA		 6040 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6041 if (err < 0)
6042 goto err_parse_key;
aaa31047 6043 }
7b225d0b
PNA		 6044
6045 if (nla[NFTA_SET_ELEM_KEY_END]) {
6046 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6047 nla[NFTA_SET_ELEM_KEY_END]);
6048 if (err < 0)
6049 goto err_parse_key;
6050
c39ba4de
PNA		 6051 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6052 if (err < 0)
6053 goto err_parse_key_end;
7b225d0b
PNA		 6054 }
6055
c3e1b005 6056 if (timeout > 0) {
c39ba4de
PNA		 6057 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6058 if (err < 0)
6059 goto err_parse_key_end;
6060
6061 if (timeout != set->timeout) {
6062 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6063 if (err < 0)
6064 goto err_parse_key_end;
6065 }
c3e1b005 6066 }
fe2811eb 6067
664899e8
PNA		 6068 if (num_exprs) {
6069 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6070 size += expr_array[i]->ops->size;
6071
c39ba4de
PNA		 6072 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6073 sizeof(struct nft_set_elem_expr) + size);
6074 if (err < 0)
6075 goto err_parse_key_end;
563125a7 6076 }
40944452 6077
8aeff920 6078 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6079 obj = nft_obj_lookup(ctx->net, ctx->table,
6080 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6081 set->objtype, genmask);
8aeff920
PNA		 6082 if (IS_ERR(obj)) {
6083 err = PTR_ERR(obj);
7b225d0b 6084 goto err_parse_key_end;
8aeff920 6085 }
c39ba4de
PNA		 6086 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6087 if (err < 0)
6088 goto err_parse_key_end;
8aeff920
PNA		 6089 }
6090
20a69341 6091 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6092 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6093 nla[NFTA_SET_ELEM_DATA]);
20a69341 6094 if (err < 0)
7b225d0b 6095 goto err_parse_key_end;
20a69341 6096
20a69341
PM		 6097 dreg = nft_type_to_reg(set->dtype);
6098 list_for_each_entry(binding, &set->bindings, list) {
6099 struct nft_ctx bind_ctx = {
58c78e10 6100 .net = ctx->net,
36596dad 6101 .family = ctx->family,
20a69341 6102 .table = ctx->table,
7c95f6d8 6103 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6104 };
6105
11113e19
PM		 6106 if (!(binding->flags & NFT_SET_MAP))
6107 continue;
6108
1ec10212 6109 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6110 &elem.data.val,
20a1452c 6111 desc.type, desc.len);
20a69341 6112 if (err < 0)
7b225d0b 6113 goto err_parse_data;
a654de8f 6114
20a1452c 6115 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6116 (elem.data.val.verdict.code == NFT_GOTO ||
6117 elem.data.val.verdict.code == NFT_JUMP))
a654de8f
PNA		 6118 nft_validate_state_update(ctx->net,
6119 NFT_VALIDATE_NEED);
20a69341 6120 }
fe2811eb 6121
c39ba4de
PNA		 6122 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6123 if (err < 0)
6124 goto err_parse_data;
20a69341
PM		 6125 }
6126
68e942e8
PM		 6127 /* The full maximum length of userdata can exceed the maximum
6128 * offset value (U8_MAX) for following extensions, therefor it
6129 * must be the last extension added.
6130 */
6131 ulen = 0;
6132 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6133 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6134 if (ulen > 0) {
6135 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6136 ulen);
6137 if (err < 0)
6138 goto err_parse_data;
6139 }
68e942e8
PM		 6140 }
6141
7b225d0b 6142 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6143 elem.key_end.val.data, elem.data.val.data,
33758c89 6144 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6145 if (IS_ERR(elem.priv)) {
6146 err = PTR_ERR(elem.priv);
7b225d0b 6147 goto err_parse_data;
34aae2c2 6148 }
fe2811eb
PM		 6149
6150 ext = nft_set_elem_ext(set, elem.priv);
6151 if (flags)
6152 *nft_set_ext_flags(ext) = flags;
34aae2c2 6153
68e942e8 6154 if (ulen > 0) {
34aae2c2
PNA		 6155 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6156 err = -EINVAL;
6157 goto err_elem_userdata;
6158 }
68e942e8
PM		 6159 udata = nft_set_ext_userdata(ext);
6160 udata->len = ulen - 1;
6161 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6162 }
8aeff920
PNA		 6163 if (obj) {
6164 *nft_set_ext_obj(ext) = obj;
6165 obj->use++;
6166 }
34aae2c2 6167 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6168 if (err < 0)
34aae2c2 6169 goto err_elem_free;
fe2811eb 6170
60319eb1 6171 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6172 if (trans == NULL) {
6173 err = -ENOMEM;
34aae2c2 6174 goto err_elem_free;
4d8f9065 6175 }
60319eb1 6176
69086658 6177 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
aaa31047
PNA		 6178
6179 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
c016c7e4
PNA		 6180 if (err) {
6181 if (err == -EEXIST) {
9744a6fc
PNA		 6182 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6183 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6184 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6185 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6186 goto err_element_clash;
8aeff920
PNA		 6187 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6188 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6189 memcmp(nft_set_ext_data(ext),
6190 nft_set_ext_data(ext2), set->dlen) != 0) ||
6191 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6192 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6193 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6194 goto err_element_clash;
c016c7e4
PNA		 6195 else if (!(nlmsg_flags & NLM_F_EXCL))
6196 err = 0;
8c2d45b2
PNA		 6197 } else if (err == -ENOTEMPTY) {
6198 /* ENOTEMPTY reports overlapping between this element
6199 * and an existing one.
6200 */
6201 err = -EEXIST;
c016c7e4 6202 }
7b225d0b 6203 goto err_element_clash;
c016c7e4 6204 }
20a69341 6205
aaa31047 6206 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
35d0ac90
PNA		 6207 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
6208 err = -ENFILE;
7b225d0b 6209 goto err_set_full;
35d0ac90
PNA		 6210 }
6211
60319eb1 6212 nft_trans_elem(trans) = elem;
0854db2a 6213 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6214 return 0;
6215
7b225d0b 6216err_set_full:
aaa31047 6217 nft_setelem_remove(ctx->net, set, &elem);
7b225d0b 6218err_element_clash:
60319eb1 6219 kfree(trans);
34aae2c2 6220err_elem_free:
b91d9036
TY		 6221 if (obj)
6222 obj->use--;
34aae2c2 6223err_elem_userdata:
475beb9c 6224 nf_tables_set_elem_destroy(ctx, set, elem.priv);
7b225d0b 6225err_parse_data:
20a69341 6226 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6227 nft_data_release(&elem.data.val, desc.type);
7b225d0b
PNA		 6228err_parse_key_end:
6229 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6230err_parse_key:
20a1452c 6231 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6232err_set_elem_expr:
664899e8 6233 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6234 nft_expr_destroy(ctx, expr_array[i]);
6235err_set_elem_expr_clone:
20a69341
PM		 6236 return err;
6237}
6238
7dab8ee3
PNA		 6239static int nf_tables_newsetelem(struct sk_buff *skb,
6240 const struct nfnl_info *info,
6241 const struct nlattr * const nla[])
20a69341 6242{
7dab8ee3
PNA		 6243 struct nftables_pernet *nft_net = nft_pernet(info->net);
6244 struct netlink_ext_ack *extack = info->extack;
6245 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6246 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6247 struct net *net = info->net;
20a69341 6248 const struct nlattr *attr;
e2b750d7 6249 struct nft_table *table;
20a69341
PM		 6250 struct nft_set *set;
6251 struct nft_ctx ctx;
a654de8f 6252 int rem, err;
20a69341 6253
7d5570ca
PNA		 6254 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6255 return -EINVAL;
6256
e2b750d7
PNA		 6257 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6258 genmask, NETLINK_CB(skb).portid);
6259 if (IS_ERR(table)) {
6260 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6261 return PTR_ERR(table);
6262 }
20a69341 6263
e2b750d7 6264 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17
PNA		 6265 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6266 if (IS_ERR(set))
6267 return PTR_ERR(set);
958bee14 6268
20a69341
PM		 6269 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6270 return -EBUSY;
6271
e2b750d7
PNA		 6272 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6273
20a69341 6274 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6275 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6276 if (err < 0) {
6277 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6278 return err;
b53c1166 6279 }
20a69341 6280 }
a654de8f 6281
0854db2a 6282 if (nft_net->validate_state == NFT_VALIDATE_DO)
e2b750d7 6283 return nft_table_validate(net, table);
a654de8f
PNA		 6284
6285 return 0;
20a69341
PM		 6286}
6287
59105446
PNA		 6288/**
6289 * nft_data_hold - hold a nft_data item
6290 *
6291 * @data: struct nft_data to release
6292 * @type: type of data
6293 *
6294 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6295 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6296 * NFT_GOTO verdicts. This function must be called on active data objects
6297 * from the second phase of the commit protocol.
6298 */
bb7b40ae 6299void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 6300{
d0e2c7de
PNA		 6301 struct nft_chain *chain;
6302 struct nft_rule *rule;
6303
59105446
PNA		 6304 if (type == NFT_DATA_VERDICT) {
6305 switch (data->verdict.code) {
6306 case NFT_JUMP:
6307 case NFT_GOTO:
d0e2c7de
PNA		 6308 chain = data->verdict.chain;
6309 chain->use++;
6310
6311 if (!nft_chain_is_bound(chain))
6312 break;
6313
6314 chain->table->use++;
6315 list_for_each_entry(rule, &chain->rules, list)
6316 chain->use++;
6317
6318 nft_chain_add(chain->table, chain);
59105446
PNA		 6319 break;
6320 }
6321 }
6322}
6323
f8bb7889
PNA		 6324static void nft_setelem_data_activate(const struct net *net,
6325 const struct nft_set *set,
6326 struct nft_set_elem *elem)
59105446
PNA		 6327{
6328 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6329
6330 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6331 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6332 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6333 (*nft_set_ext_obj(ext))->use++;
6334}
6335
f8bb7889
PNA		 6336static void nft_setelem_data_deactivate(const struct net *net,
6337 const struct nft_set *set,
6338 struct nft_set_elem *elem)
59105446
PNA		 6339{
6340 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6341
6342 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6343 nft_data_release(nft_set_ext_data(ext), set->dtype);
6344 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6345 (*nft_set_ext_obj(ext))->use--;
6346}
6347
60319eb1 6348static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 6349 const struct nlattr *attr)
6350{
6351 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 6352 struct nft_set_ext_tmpl tmpl;
20a69341 6353 struct nft_set_elem elem;
3971ca14 6354 struct nft_set_ext *ext;
60319eb1 6355 struct nft_trans *trans;
3971ca14 6356 u32 flags = 0;
20a69341
PM		 6357 int err;
6358
8cb08174
JB		 6359 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6360 nft_set_elem_policy, NULL);
20a69341 6361 if (err < 0)
20a1452c 6362 return err;
20a69341 6363
aaa31047
PNA		 6364 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6365 if (err < 0)
6366 return err;
6367
6368 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 6369 return -EINVAL;
20a69341 6370
88cccd90
PNA		 6371 if (!nft_setelem_valid_key_end(set, nla, flags))
6372 return -EINVAL;
6373
3971ca14
PNA		 6374 nft_set_ext_prepare(&tmpl);
6375
c39ba4de
PNA		 6376 if (flags != 0) {
6377 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6378 if (err < 0)
6379 return err;
6380 }
3971ca14 6381
aaa31047
PNA		 6382 if (nla[NFTA_SET_ELEM_KEY]) {
6383 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6384 nla[NFTA_SET_ELEM_KEY]);
6385 if (err < 0)
6386 return err;
20a69341 6387
c39ba4de
PNA		 6388 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6389 if (err < 0)
6390 goto fail_elem;
aaa31047 6391 }
3971ca14 6392
7b225d0b
PNA		 6393 if (nla[NFTA_SET_ELEM_KEY_END]) {
6394 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6395 nla[NFTA_SET_ELEM_KEY_END]);
6396 if (err < 0)
c39ba4de 6397 goto fail_elem;
7b225d0b 6398
c39ba4de
PNA		 6399 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6400 if (err < 0)
6401 goto fail_elem_key_end;
7b225d0b
PNA		 6402 }
6403
3971ca14 6404 err = -ENOMEM;
7b225d0b
PNA		 6405 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6406 elem.key_end.val.data, NULL, 0, 0,
33758c89 6407 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6408 if (IS_ERR(elem.priv)) {
6409 err = PTR_ERR(elem.priv);
c39ba4de 6410 goto fail_elem_key_end;
34aae2c2 6411 }
3971ca14
PNA		 6412
6413 ext = nft_set_elem_ext(set, elem.priv);
6414 if (flags)
6415 *nft_set_ext_flags(ext) = flags;
6416
60319eb1 6417 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 6418 if (trans == NULL)
6419 goto fail_trans;
20a69341 6420
aaa31047
PNA		 6421 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6422 if (err < 0)
20a1452c 6423 goto fail_ops;
cc02e457 6424
f8bb7889 6425 nft_setelem_data_deactivate(ctx->net, set, &elem);
59105446 6426
60319eb1 6427 nft_trans_elem(trans) = elem;
0854db2a 6428 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 6429 return 0;
cc02e457 6430
20a1452c 6431fail_ops:
cc02e457 6432 kfree(trans);
20a1452c 6433fail_trans:
3971ca14 6434 kfree(elem.priv);
c39ba4de
PNA		 6435fail_elem_key_end:
6436 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 6437fail_elem:
6438 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 6439 return err;
6440}
6441
e6ba7cb6
PNA		 6442static int nft_setelem_flush(const struct nft_ctx *ctx,
6443 struct nft_set *set,
6444 const struct nft_set_iter *iter,
6445 struct nft_set_elem *elem)
8411b644
PNA		 6446{
6447 struct nft_trans *trans;
6448 int err;
6449
6450 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6451 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6452 if (!trans)
6453 return -ENOMEM;
6454
1ba1c414 6455 if (!set->ops->flush(ctx->net, set, elem->priv)) {
8411b644
PNA		 6456 err = -ENOENT;
6457 goto err1;
6458 }
b2c11e4b 6459 set->ndeact++;
8411b644 6460
f8bb7889 6461 nft_setelem_data_deactivate(ctx->net, set, elem);
de70185d
PNA		 6462 nft_trans_elem_set(trans) = set;
6463 nft_trans_elem(trans) = *elem;
0854db2a 6464 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 6465
6466 return 0;
6467err1:
6468 kfree(trans);
6469 return err;
6470}
6471
aaa31047
PNA		 6472static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6473 struct nft_set *set,
6474 struct nft_set_elem *elem)
6475{
6476 struct nft_trans *trans;
6477
6478 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6479 sizeof(struct nft_trans_elem), GFP_KERNEL);
6480 if (!trans)
6481 return -ENOMEM;
6482
6483 nft_setelem_data_deactivate(ctx->net, set, elem);
6484 nft_trans_elem_set(trans) = set;
6485 nft_trans_elem(trans) = *elem;
6486 nft_trans_commit_list_add_tail(ctx->net, trans);
6487
6488 return 0;
6489}
6490
6491static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6492 struct nft_set *set)
6493{
6494 u8 genmask = nft_genmask_next(ctx->net);
6495 struct nft_set_elem_catchall *catchall;
6496 struct nft_set_elem elem;
6497 struct nft_set_ext *ext;
6498 int ret = 0;
6499
6500 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6501 ext = nft_set_elem_ext(set, catchall->elem);
6502 if (!nft_set_elem_active(ext, genmask) ||
6503 nft_set_elem_mark_busy(ext))
6504 continue;
6505
6506 elem.priv = catchall->elem;
6507 ret = __nft_set_catchall_flush(ctx, set, &elem);
6508 if (ret < 0)
6509 break;
6510 }
6511
6512 return ret;
6513}
6514
e6ba7cb6
PNA		 6515static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
6516{
6517 struct nft_set_iter iter = {
6518 .genmask = genmask,
6519 .fn = nft_setelem_flush,
6520 };
6521
6522 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 6523 if (!iter.err)
6524 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 6525
6526 return iter.err;
6527}
6528
7dab8ee3
PNA		 6529static int nf_tables_delsetelem(struct sk_buff *skb,
6530 const struct nfnl_info *info,
6531 const struct nlattr * const nla[])
20a69341 6532{
7dab8ee3
PNA		 6533 struct netlink_ext_ack *extack = info->extack;
6534 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6535 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6536 struct net *net = info->net;
20a69341 6537 const struct nlattr *attr;
e2b750d7 6538 struct nft_table *table;
20a69341
PM		 6539 struct nft_set *set;
6540 struct nft_ctx ctx;
60319eb1 6541 int rem, err = 0;
20a69341 6542
e2b750d7
PNA		 6543 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6544 genmask, NETLINK_CB(skb).portid);
6545 if (IS_ERR(table)) {
6546 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6547 return PTR_ERR(table);
6548 }
20a69341 6549
e2b750d7 6550 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
20a69341
PM		 6551 if (IS_ERR(set))
6552 return PTR_ERR(set);
6553 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6554 return -EBUSY;
6555
e2b750d7
PNA		 6556 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6557
e6ba7cb6
PNA		 6558 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6559 return nft_set_flush(&ctx, set, genmask);
8411b644 6560
20a69341
PM		 6561 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6562 err = nft_del_setelem(&ctx, set, attr);
b53c1166
PNA		 6563 if (err < 0) {
6564 NL_SET_BAD_ATTR(extack, attr);
60319eb1 6565 break;
b53c1166 6566 }
20a69341 6567 }
60319eb1 6568 return err;
20a69341
PM		 6569}
6570
cfed7e1b
PM		 6571void nft_set_gc_batch_release(struct rcu_head *rcu)
6572{
6573 struct nft_set_gc_batch *gcb;
6574 unsigned int i;
6575
6576 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
6577 for (i = 0; i < gcb->head.cnt; i++)
61f9e292 6578 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
cfed7e1b
PM		 6579 kfree(gcb);
6580}
cfed7e1b
PM		 6581
6582struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
6583 gfp_t gfp)
6584{
6585 struct nft_set_gc_batch *gcb;
6586
6587 gcb = kzalloc(sizeof(*gcb), gfp);
6588 if (gcb == NULL)
6589 return gcb;
6590 gcb->head.set = set;
6591 return gcb;
6592}
cfed7e1b 6593
e5009240
PNA		 6594/*
6595 * Stateful objects
6596 */
6597
6598/**
6599 * nft_register_obj- register nf_tables stateful object type
3db86c39 6600 * @obj_type: object type
e5009240
PNA		 6601 *
6602 * Registers the object type for use with nf_tables. Returns zero on
6603 * success or a negative errno code otherwise.
6604 */
6605int nft_register_obj(struct nft_object_type *obj_type)
6606{
6607 if (obj_type->type == NFT_OBJECT_UNSPEC)
6608 return -EINVAL;
6609
6610 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6611 list_add_rcu(&obj_type->list, &nf_tables_objects);
6612 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6613 return 0;
6614}
6615EXPORT_SYMBOL_GPL(nft_register_obj);
6616
6617/**
6618 * nft_unregister_obj - unregister nf_tables object type
3db86c39 6619 * @obj_type: object type
e5009240
PNA		 6620 *
6621 * Unregisters the object type for use with nf_tables.
6622 */
6623void nft_unregister_obj(struct nft_object_type *obj_type)
6624{
6625 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6626 list_del_rcu(&obj_type->list);
6627 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6628}
6629EXPORT_SYMBOL_GPL(nft_unregister_obj);
6630
4d44175a
FW		 6631struct nft_object *nft_obj_lookup(const struct net *net,
6632 const struct nft_table *table,
cac20fcd
PNA		 6633 const struct nlattr *nla, u32 objtype,
6634 u8 genmask)
e5009240 6635{
4d44175a
FW		 6636 struct nft_object_hash_key k = { .table = table };
6637 char search[NFT_OBJ_MAXNAMELEN];
6638 struct rhlist_head *tmp, *list;
e5009240
PNA		 6639 struct nft_object *obj;
6640
872f6903 6641 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 6642 k.name = search;
6643
6644 WARN_ON_ONCE(!rcu_read_lock_held() &&
6645 !lockdep_commit_lock_is_held(net));
6646
6647 rcu_read_lock();
6648 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
6649 if (!list)
6650 goto out;
6651
6652 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
6653 if (objtype == obj->ops->type->type &&
6654 nft_active_genmask(obj, genmask)) {
6655 rcu_read_unlock();
e5009240 6656 return obj;
4d44175a 6657 }
e5009240 6658 }
4d44175a
FW		 6659out:
6660 rcu_read_unlock();
e5009240
PNA		 6661 return ERR_PTR(-ENOENT);
6662}
cac20fcd 6663EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 6664
cac20fcd
PNA		 6665static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
6666 const struct nlattr *nla,
6667 u32 objtype, u8 genmask)
3ecbfd65
HS		 6668{
6669 struct nft_object *obj;
6670
6671 list_for_each_entry(obj, &table->objects, list) {
6672 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
6673 objtype == obj->ops->type->type &&
6674 nft_active_genmask(obj, genmask))
6675 return obj;
6676 }
6677 return ERR_PTR(-ENOENT);
6678}
6679
e5009240 6680static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 6681 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
6682 .len = NFT_TABLE_MAXNAMELEN - 1 },
6683 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
6684 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 6685 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
6686 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 6687 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 6688 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
6689 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 6690};
6691
84fba055
FW		 6692static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
6693 const struct nft_object_type *type,
e5009240
PNA		 6694 const struct nlattr *attr)
6695{
5b4c6e38 6696 struct nlattr **tb;
dfc46034 6697 const struct nft_object_ops *ops;
e5009240 6698 struct nft_object *obj;
5b4c6e38
GS		 6699 int err = -ENOMEM;
6700
6701 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
6702 if (!tb)
6703 goto err1;
e5009240
PNA		 6704
6705 if (attr) {
8cb08174
JB		 6706 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
6707 type->policy, NULL);
e5009240 6708 if (err < 0)
5b4c6e38 6709 goto err2;
e5009240
PNA		 6710 } else {
6711 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
6712 }
6713
dfc46034
PBG		 6714 if (type->select_ops) {
6715 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
6716 if (IS_ERR(ops)) {
6717 err = PTR_ERR(ops);
5b4c6e38 6718 goto err2;
dfc46034
PBG		 6719 }
6720 } else {
6721 ops = type->ops;
6722 }
6723
e5009240 6724 err = -ENOMEM;
33758c89 6725 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 6726 if (!obj)
6727 goto err2;
e5009240 6728
dfc46034 6729 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 6730 if (err < 0)
5b4c6e38 6731 goto err3;
e5009240 6732
dfc46034
PBG		 6733 obj->ops = ops;
6734
5b4c6e38 6735 kfree(tb);
e5009240 6736 return obj;
5b4c6e38 6737err3:
e5009240 6738 kfree(obj);
5b4c6e38
GS		 6739err2:
6740 kfree(tb);
e5009240
PNA		 6741err1:
6742 return ERR_PTR(err);
6743}
6744
6745static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 6746 struct nft_object *obj, bool reset)
e5009240
PNA		 6747{
6748 struct nlattr *nest;
6749
ae0be8de 6750 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 6751 if (!nest)
6752 goto nla_put_failure;
dfc46034 6753 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 6754 goto nla_put_failure;
6755 nla_nest_end(skb, nest);
6756 return 0;
6757
6758nla_put_failure:
6759 return -1;
6760}
6761
6762static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
6763{
6764 const struct nft_object_type *type;
6765
6766 list_for_each_entry(type, &nf_tables_objects, list) {
6767 if (objtype == type->type)
6768 return type;
6769 }
6770 return NULL;
6771}
6772
452238e8
FW		 6773static const struct nft_object_type *
6774nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 6775{
6776 const struct nft_object_type *type;
6777
6778 type = __nft_obj_type_get(objtype);
6779 if (type != NULL && try_module_get(type->owner))
6780 return type;
6781
f102d66b 6782 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 6783#ifdef CONFIG_MODULES
6784 if (type == NULL) {
eb014de4 6785 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 6786 return ERR_PTR(-EAGAIN);
6787 }
6788#endif
6789 return ERR_PTR(-ENOENT);
6790}
6791
d62d0ba9
FFM		 6792static int nf_tables_updobj(const struct nft_ctx *ctx,
6793 const struct nft_object_type *type,
6794 const struct nlattr *attr,
6795 struct nft_object *obj)
6796{
6797 struct nft_object *newobj;
6798 struct nft_trans *trans;
dad3bdee
FW		 6799 int err = -ENOMEM;
6800
6801 if (!try_module_get(type->owner))
6802 return -ENOENT;
d62d0ba9
FFM		 6803
6804 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
6805 sizeof(struct nft_trans_obj));
6806 if (!trans)
dad3bdee 6807 goto err_trans;
d62d0ba9
FFM		 6808
6809 newobj = nft_obj_init(ctx, type, attr);
6810 if (IS_ERR(newobj)) {
6811 err = PTR_ERR(newobj);
b74ae961 6812 goto err_free_trans;
d62d0ba9
FFM		 6813 }
6814
6815 nft_trans_obj(trans) = obj;
6816 nft_trans_obj_update(trans) = true;
6817 nft_trans_obj_newobj(trans) = newobj;
0854db2a 6818 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 6819
6820 return 0;
b74ae961
DC		 6821
6822err_free_trans:
d62d0ba9 6823 kfree(trans);
dad3bdee
FW		 6824err_trans:
6825 module_put(type->owner);
d62d0ba9
FFM		 6826 return err;
6827}
6828
7dab8ee3
PNA		 6829static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
6830 const struct nlattr * const nla[])
e5009240 6831{
7dab8ee3
PNA		 6832 struct netlink_ext_ack *extack = info->extack;
6833 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 6834 u8 family = info->nfmsg->nfgen_family;
e5009240 6835 const struct nft_object_type *type;
7dab8ee3 6836 struct net *net = info->net;
e5009240
PNA		 6837 struct nft_table *table;
6838 struct nft_object *obj;
6839 struct nft_ctx ctx;
6840 u32 objtype;
6841 int err;
6842
6843 if (!nla[NFTA_OBJ_TYPE] ||
6844 !nla[NFTA_OBJ_NAME] ||
6845 !nla[NFTA_OBJ_DATA])
6846 return -EINVAL;
6847
6001a930
PNA		 6848 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
6849 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 6850 if (IS_ERR(table)) {
6851 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 6852 return PTR_ERR(table);
36dd1bcc 6853 }
e5009240
PNA		 6854
6855 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 6856 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 6857 if (IS_ERR(obj)) {
6858 err = PTR_ERR(obj);
36dd1bcc
PNA		 6859 if (err != -ENOENT) {
6860 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 6861 return err;
36dd1bcc 6862 }
1a28ad74 6863 } else {
7dab8ee3 6864 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 6865 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 6866 return -EEXIST;
36dd1bcc 6867 }
7dab8ee3 6868 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 6869 return -EOPNOTSUPP;
6870
fd57d0cb 6871 type = __nft_obj_type_get(objtype);
7dab8ee3 6872 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 6873
6874 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 6875 }
6876
7dab8ee3 6877 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 6878
452238e8 6879 type = nft_obj_type_get(net, objtype);
e5009240
PNA		 6880 if (IS_ERR(type))
6881 return PTR_ERR(type);
6882
84fba055 6883 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 6884 if (IS_ERR(obj)) {
6885 err = PTR_ERR(obj);
b131c964 6886 goto err_init;
e5009240 6887 }
d152159b 6888 obj->key.table = table;
3ecbfd65
HS		 6889 obj->handle = nf_tables_alloc_handle(table);
6890
33758c89 6891 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 6892 if (!obj->key.name) {
61509575 6893 err = -ENOMEM;
b131c964
JGG		 6894 goto err_strdup;
6895 }
6896
6897 if (nla[NFTA_OBJ_USERDATA]) {
85db827a 6898 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL);
b131c964
JGG		 6899 if (obj->udata == NULL)
6900 goto err_userdata;
6901
85db827a 6902 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 6903 }
e5009240
PNA		 6904
6905 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
6906 if (err < 0)
b131c964 6907 goto err_trans;
e5009240 6908
4d44175a
FW		 6909 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
6910 nft_objname_ht_params);
6911 if (err < 0)
b131c964 6912 goto err_obj_ht;
4d44175a 6913
e5009240
PNA		 6914 list_add_tail_rcu(&obj->list, &table->objects);
6915 table->use++;
6916 return 0;
b131c964 6917err_obj_ht:
4d44175a
FW		 6918 /* queued in transaction log */
6919 INIT_LIST_HEAD(&obj->list);
6920 return err;
b131c964 6921err_trans:
b131c964 6922 kfree(obj->udata);
85dfd816
PNA		 6923err_userdata:
6924 kfree(obj->key.name);
b131c964 6925err_strdup:
dfc46034 6926 if (obj->ops->destroy)
00bfb320 6927 obj->ops->destroy(&ctx, obj);
e5009240 6928 kfree(obj);
b131c964 6929err_init:
e5009240
PNA		 6930 module_put(type->owner);
6931 return err;
6932}
6933
6934static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
6935 u32 portid, u32 seq, int event, u32 flags,
6936 int family, const struct nft_table *table,
43da04a5 6937 struct nft_object *obj, bool reset)
e5009240 6938{
e5009240
PNA		 6939 struct nlmsghdr *nlh;
6940
dedb67c4 6941 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 6942 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
6943 NFNETLINK_V0, nft_base_seq(net));
6944 if (!nlh)
e5009240
PNA		 6945 goto nla_put_failure;
6946
e5009240 6947 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 6948 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
dfc46034 6949 nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
e5009240 6950 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
3ecbfd65
HS		 6951 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset) ||
6952 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
6953 NFTA_OBJ_PAD))
e5009240
PNA		 6954 goto nla_put_failure;
6955
b131c964
JGG		 6956 if (obj->udata &&
6957 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
6958 goto nla_put_failure;
6959
e5009240
PNA		 6960 nlmsg_end(skb, nlh);
6961 return 0;
6962
6963nla_put_failure:
6964 nlmsg_trim(skb, nlh);
6965 return -1;
6966}
6967
a9fea2a3 6968struct nft_obj_filter {
e46abbcc 6969 char *table;
a9fea2a3
PNA		 6970 u32 type;
6971};
6972
e5009240
PNA		 6973static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
6974{
6975 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
e5009240 6976 const struct nft_table *table;
e5009240 6977 unsigned int idx = 0, s_idx = cb->args[0];
a9fea2a3 6978 struct nft_obj_filter *filter = cb->data;
e5009240
PNA		 6979 struct net *net = sock_net(skb->sk);
6980 int family = nfmsg->nfgen_family;
0854db2a 6981 struct nftables_pernet *nft_net;
43da04a5
PNA		 6982 struct nft_object *obj;
6983 bool reset = false;
6984
6985 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
6986 reset = true;
e5009240
PNA		 6987
6988 rcu_read_lock();
d59d2f82 6989 nft_net = nft_pernet(net);
34002783 6990 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 6991
0854db2a 6992 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 6993 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 6994 continue;
6995
36596dad
PNA		 6996 list_for_each_entry_rcu(obj, &table->objects, list) {
6997 if (!nft_is_active(net, obj))
6998 goto cont;
6999 if (idx < s_idx)
7000 goto cont;
7001 if (idx > s_idx)
7002 memset(&cb->args[1], 0,
7003 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7004 if (filter && filter->table &&
36596dad
PNA		 7005 strcmp(filter->table, table->name))
7006 goto cont;
7007 if (filter &&
7008 filter->type != NFT_OBJECT_UNSPEC &&
7009 obj->ops->type->type != filter->type)
7010 goto cont;
8e6cf365 7011 if (reset) {
68df2ed5 7012 char *buf = kasprintf(GFP_ATOMIC,
c520292f 7013 "%s:%u",
8e6cf365 7014 table->name,
0854db2a 7015 nft_net->base_seq);
8e6cf365
RGB		 7016
7017 audit_log_nfcfg(buf,
7018 family,
7019 obj->handle,
14224039 7020 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7021 GFP_ATOMIC);
8e6cf365
RGB		 7022 kfree(buf);
7023 }
7024
36596dad
PNA		 7025 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7026 cb->nlh->nlmsg_seq,
7027 NFT_MSG_NEWOBJ,
7028 NLM_F_MULTI | NLM_F_APPEND,
98319cb9 7029 table->family, table,
36596dad
PNA		 7030 obj, reset) < 0)
7031 goto done;
e5009240 7032
36596dad 7033 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7034cont:
36596dad 7035 idx++;
e5009240
PNA		 7036 }
7037 }
7038done:
7039 rcu_read_unlock();
7040
7041 cb->args[0] = idx;
7042 return skb->len;
7043}
7044
90fd131a 7045static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7046{
90fd131a
FW		 7047 const struct nlattr * const *nla = cb->data;
7048 struct nft_obj_filter *filter = NULL;
e46abbcc 7049
90fd131a
FW		 7050 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7051 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7052 if (!filter)
7053 return -ENOMEM;
7054
7055 if (nla[NFTA_OBJ_TABLE]) {
7056 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7057 if (!filter->table) {
7058 kfree(filter);
7059 return -ENOMEM;
7060 }
7061 }
7062
7063 if (nla[NFTA_OBJ_TYPE])
7064 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
8bea728d 7065 }
a9fea2a3 7066
90fd131a 7067 cb->data = filter;
a9fea2a3
PNA		 7068 return 0;
7069}
7070
90fd131a 7071static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7072{
90fd131a 7073 struct nft_obj_filter *filter = cb->data;
a9fea2a3 7074
90fd131a
FW		 7075 if (filter) {
7076 kfree(filter->table);
7077 kfree(filter);
e46abbcc 7078 }
a9fea2a3 7079
90fd131a 7080 return 0;
a9fea2a3
PNA		 7081}
7082
d9adf22a 7083/* called with rcu_read_lock held */
797d4980
PNA		 7084static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7085 const struct nlattr * const nla[])
e5009240 7086{
797d4980
PNA		 7087 struct netlink_ext_ack *extack = info->extack;
7088 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7089 u8 family = info->nfmsg->nfgen_family;
e5009240 7090 const struct nft_table *table;
797d4980 7091 struct net *net = info->net;
e5009240
PNA		 7092 struct nft_object *obj;
7093 struct sk_buff *skb2;
43da04a5 7094 bool reset = false;
e5009240
PNA		 7095 u32 objtype;
7096 int err;
7097
797d4980 7098 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7099 struct netlink_dump_control c = {
90fd131a 7100 .start = nf_tables_dump_obj_start,
e5009240 7101 .dump = nf_tables_dump_obj,
a9fea2a3 7102 .done = nf_tables_dump_obj_done,
d9adf22a 7103 .module = THIS_MODULE,
90fd131a 7104 .data = (void *)nla,
e5009240 7105 };
a9fea2a3 7106
797d4980 7107 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7108 }
7109
7110 if (!nla[NFTA_OBJ_NAME] ||
7111 !nla[NFTA_OBJ_TYPE])
7112 return -EINVAL;
7113
6001a930 7114 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7115 if (IS_ERR(table)) {
7116 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7117 return PTR_ERR(table);
36dd1bcc 7118 }
e5009240
PNA		 7119
7120 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7121 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7122 if (IS_ERR(obj)) {
7123 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7124 return PTR_ERR(obj);
36dd1bcc 7125 }
e5009240 7126
d9adf22a 7127 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7128 if (!skb2)
7129 return -ENOMEM;
7130
797d4980 7131 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7132 reset = true;
7133
8e6cf365 7134 if (reset) {
0854db2a
FW		 7135 const struct nftables_pernet *nft_net;
7136 char *buf;
7137
d59d2f82 7138 nft_net = nft_pernet(net);
0854db2a 7139 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7140
7141 audit_log_nfcfg(buf,
7142 family,
7143 obj->handle,
14224039 7144 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7145 GFP_ATOMIC);
8e6cf365
RGB		 7146 kfree(buf);
7147 }
7148
e5009240 7149 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7150 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7151 family, table, obj, reset);
e5009240 7152 if (err < 0)
ee921183 7153 goto err_fill_obj_info;
e5009240 7154
ee921183
PNA		 7155 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7156
7157err_fill_obj_info:
e5009240
PNA		 7158 kfree_skb(skb2);
7159 return err;
e5009240
PNA		 7160}
7161
00bfb320 7162static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7163{
dfc46034 7164 if (obj->ops->destroy)
00bfb320 7165 obj->ops->destroy(ctx, obj);
e5009240 7166
dfc46034 7167 module_put(obj->ops->type->owner);
d152159b 7168 kfree(obj->key.name);
bc7a7082 7169 kfree(obj->udata);
e5009240
PNA		 7170 kfree(obj);
7171}
7172
7dab8ee3
PNA		 7173static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7174 const struct nlattr * const nla[])
e5009240 7175{
7dab8ee3
PNA		 7176 struct netlink_ext_ack *extack = info->extack;
7177 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7178 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7179 struct net *net = info->net;
36dd1bcc 7180 const struct nlattr *attr;
e5009240
PNA		 7181 struct nft_table *table;
7182 struct nft_object *obj;
7183 struct nft_ctx ctx;
7184 u32 objtype;
7185
7186 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7187 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7188 return -EINVAL;
7189
6001a930
PNA		 7190 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7191 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7192 if (IS_ERR(table)) {
7193 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7194 return PTR_ERR(table);
36dd1bcc 7195 }
e5009240
PNA		 7196
7197 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7198 if (nla[NFTA_OBJ_HANDLE]) {
7199 attr = nla[NFTA_OBJ_HANDLE];
7200 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7201 } else {
7202 attr = nla[NFTA_OBJ_NAME];
4d44175a 7203 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7204 }
7205
7206 if (IS_ERR(obj)) {
7207 NL_SET_BAD_ATTR(extack, attr);
e5009240 7208 return PTR_ERR(obj);
36dd1bcc
PNA		 7209 }
7210 if (obj->use > 0) {
7211 NL_SET_BAD_ATTR(extack, attr);
e5009240 7212 return -EBUSY;
36dd1bcc 7213 }
e5009240 7214
7dab8ee3 7215 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7216
7217 return nft_delobj(&ctx, obj);
7218}
7219
d152159b 7220void nft_obj_notify(struct net *net, const struct nft_table *table,
25e94a99 7221 struct nft_object *obj, u32 portid, u32 seq, int event,
6fb721cf 7222 u16 flags, int family, int report, gfp_t gfp)
e5009240 7223{
d59d2f82 7224 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7225 struct sk_buff *skb;
7226 int err;
c520292f 7227 char *buf = kasprintf(gfp, "%s:%u",
0854db2a 7228 table->name, nft_net->base_seq);
8e6cf365
RGB		 7229
7230 audit_log_nfcfg(buf,
7231 family,
7232 obj->handle,
7233 event == NFT_MSG_NEWOBJ ?
c520292f
RGB		 7234 AUDIT_NFT_OP_OBJ_REGISTER :
7235 AUDIT_NFT_OP_OBJ_UNREGISTER,
68df2ed5 7236 gfp);
8e6cf365 7237 kfree(buf);
e5009240 7238
2599e989
PNA		 7239 if (!report &&
7240 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7241 return;
e5009240 7242
2599e989 7243 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7244 if (skb == NULL)
7245 goto err;
7246
6fb721cf
PNA		 7247 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7248 flags & (NLM_F_CREATE | NLM_F_EXCL),
7249 family, table, obj, false);
e5009240
PNA		 7250 if (err < 0) {
7251 kfree_skb(skb);
7252 goto err;
7253 }
7254
0854db2a 7255 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7256 return;
e5009240 7257err:
25e94a99 7258 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7259}
2599e989
PNA		 7260EXPORT_SYMBOL_GPL(nft_obj_notify);
7261
25e94a99
PNA		 7262static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7263 struct nft_object *obj, int event)
2599e989 7264{
25e94a99 7265 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
6fb721cf 7266 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
2599e989 7267}
e5009240 7268
3b49e2e9
PNA		 7269/*
7270 * Flow tables
7271 */
7272void nft_register_flowtable_type(struct nf_flowtable_type *type)
7273{
7274 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7275 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7276 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7277}
7278EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7279
7280void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7281{
7282 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7283 list_del_rcu(&type->list);
7284 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7285}
7286EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7287
7288static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7289 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7290 .len = NFT_NAME_MAXLEN - 1 },
7291 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7292 .len = NFT_NAME_MAXLEN - 1 },
7293 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 7294 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 7295 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 7296};
7297
cac20fcd
PNA		 7298struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7299 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 7300{
7301 struct nft_flowtable *flowtable;
7302
d9adf22a 7303 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 7304 if (!nla_strcmp(nla, flowtable->name) &&
7305 nft_active_genmask(flowtable, genmask))
7306 return flowtable;
7307 }
7308 return ERR_PTR(-ENOENT);
7309}
cac20fcd 7310EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 7311
9b05b6e1
LGL		 7312void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7313 struct nft_flowtable *flowtable,
7314 enum nft_trans_phase phase)
7315{
7316 switch (phase) {
7317 case NFT_TRANS_PREPARE:
7318 case NFT_TRANS_ABORT:
7319 case NFT_TRANS_RELEASE:
7320 flowtable->use--;
954d8297 7321 fallthrough;
9b05b6e1
LGL		 7322 default:
7323 return;
7324 }
7325}
7326EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7327
ae0662f8 7328static struct nft_flowtable *
cac20fcd
PNA		 7329nft_flowtable_lookup_byhandle(const struct nft_table *table,
7330 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 7331{
7332 struct nft_flowtable *flowtable;
7333
7334 list_for_each_entry(flowtable, &table->flowtables, list) {
7335 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7336 nft_active_genmask(flowtable, genmask))
7337 return flowtable;
7338 }
7339 return ERR_PTR(-ENOENT);
7340}
7341
d9246a53
PNA		 7342struct nft_flowtable_hook {
7343 u32 num;
7344 int priority;
7345 struct list_head list;
7346};
7347
3b49e2e9
PNA		 7348static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7349 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7350 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7351 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7352};
7353
d9246a53
PNA		 7354static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
7355 const struct nlattr *attr,
7356 struct nft_flowtable_hook *flowtable_hook,
5b6743fb 7357 struct nft_flowtable *flowtable, bool add)
3b49e2e9 7358{
3b49e2e9 7359 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 7360 struct nft_hook *hook;
3b49e2e9 7361 int hooknum, priority;
3f0465a9 7362 int err;
3b49e2e9 7363
d9246a53
PNA		 7364 INIT_LIST_HEAD(&flowtable_hook->list);
7365
8cb08174
JB		 7366 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX, attr,
7367 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 7368 if (err < 0)
7369 return err;
7370
5b6743fb
PNA		 7371 if (add) {
7372 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
7373 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY])
7374 return -EINVAL;
3b49e2e9 7375
5b6743fb
PNA		 7376 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7377 if (hooknum != NF_NETDEV_INGRESS)
7378 return -EOPNOTSUPP;
7379
7380 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7381
7382 flowtable_hook->priority = priority;
7383 flowtable_hook->num = hooknum;
7384 } else {
7385 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7386 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7387 if (hooknum != flowtable->hooknum)
7388 return -EOPNOTSUPP;
7389 }
7390
7391 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7392 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7393 if (priority != flowtable->data.priority)
7394 return -EOPNOTSUPP;
7395 }
3b49e2e9 7396
5b6743fb
PNA		 7397 flowtable_hook->priority = flowtable->data.priority;
7398 flowtable_hook->num = flowtable->hooknum;
7399 }
3b49e2e9 7400
05abe445
PNA		 7401 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7402 err = nf_tables_parse_netdev_hooks(ctx->net,
7403 tb[NFTA_FLOWTABLE_HOOK_DEVS],
7404 &flowtable_hook->list);
7405 if (err < 0)
7406 return err;
7407 }
3b49e2e9 7408
d9246a53 7409 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 7410 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 7411 hook->ops.hooknum = flowtable_hook->num;
7412 hook->ops.priority = flowtable_hook->priority;
7413 hook->ops.priv = &flowtable->data;
7414 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 7415 }
7416
3b49e2e9
PNA		 7417 return err;
7418}
7419
98319cb9 7420static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 7421{
7422 const struct nf_flowtable_type *type;
7423
7424 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 7425 if (family == type->family)
3b49e2e9
PNA		 7426 return type;
7427 }
7428 return NULL;
7429}
7430
452238e8
FW		 7431static const struct nf_flowtable_type *
7432nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 7433{
7434 const struct nf_flowtable_type *type;
7435
98319cb9 7436 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 7437 if (type != NULL && try_module_get(type->owner))
7438 return type;
7439
f102d66b 7440 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 7441#ifdef CONFIG_MODULES
7442 if (type == NULL) {
eb014de4 7443 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 7444 return ERR_PTR(-EAGAIN);
7445 }
7446#endif
7447 return ERR_PTR(-ENOENT);
7448}
7449
5acab914 7450/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 7451static void nft_unregister_flowtable_hook(struct net *net,
7452 struct nft_flowtable *flowtable,
7453 struct nft_hook *hook)
7454{
7455 nf_unregister_net_hook(net, &hook->ops);
7456 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7457 FLOW_BLOCK_UNBIND);
7458}
7459
f9a43007
PNA		 7460static void __nft_unregister_flowtable_net_hooks(struct net *net,
7461 struct list_head *hook_list,
7462 bool release_netdev)
3b49e2e9 7463{
f9a43007 7464 struct nft_hook *hook, *next;
3b49e2e9 7465
f9a43007 7466 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 7467 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 7468 if (release_netdev) {
7469 list_del(&hook->list);
ab5e5c06 7470 kfree_rcu(hook, rcu);
f9a43007
PNA		 7471 }
7472 }
7473}
7474
7475static void nft_unregister_flowtable_net_hooks(struct net *net,
7476 struct list_head *hook_list)
7477{
7478 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 7479}
7480
7481static int nft_register_flowtable_net_hooks(struct net *net,
7482 struct nft_table *table,
f9382669 7483 struct list_head *hook_list,
3f0465a9
PNA		 7484 struct nft_flowtable *flowtable)
7485{
7486 struct nft_hook *hook, *hook2, *next;
7487 struct nft_flowtable *ft;
7488 int err, i = 0;
7489
f9382669 7490 list_for_each_entry(hook, hook_list, list) {
3f0465a9 7491 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 7492 if (!nft_is_active_next(net, ft))
7493 continue;
7494
3f0465a9
PNA		 7495 list_for_each_entry(hook2, &ft->hook_list, list) {
7496 if (hook->ops.dev == hook2->ops.dev &&
7497 hook->ops.pf == hook2->ops.pf) {
77a92189 7498 err = -EEXIST;
3f0465a9
PNA		 7499 goto err_unregister_net_hooks;
7500 }
7501 }
7502 }
3b49e2e9 7503
d7c03a9f 7504 err = flowtable->data.type->setup(&flowtable->data,
7505 hook->ops.dev,
7506 FLOW_BLOCK_BIND);
3f0465a9
PNA		 7507 if (err < 0)
7508 goto err_unregister_net_hooks;
7509
d7c03a9f 7510 err = nf_register_net_hook(net, &hook->ops);
7511 if (err < 0) {
7512 flowtable->data.type->setup(&flowtable->data,
7513 hook->ops.dev,
7514 FLOW_BLOCK_UNBIND);
7515 goto err_unregister_net_hooks;
7516 }
7517
3f0465a9 7518 i++;
3b49e2e9 7519 }
3f0465a9
PNA		 7520
7521 return 0;
7522
7523err_unregister_net_hooks:
f9382669 7524 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 7525 if (i-- <= 0)
7526 break;
7527
ff4bf2f4 7528 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7529 list_del_rcu(&hook->list);
7530 kfree_rcu(hook, rcu);
7531 }
7532
7533 return err;
3b49e2e9
PNA		 7534}
7535
389a2cbc
PNA		 7536static void nft_flowtable_hooks_destroy(struct list_head *hook_list)
7537{
7538 struct nft_hook *hook, *next;
7539
7540 list_for_each_entry_safe(hook, next, hook_list, list) {
7541 list_del_rcu(&hook->list);
7542 kfree_rcu(hook, rcu);
7543 }
7544}
7545
78d9f48f
PNA		 7546static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
7547 struct nft_flowtable *flowtable)
7548{
7549 const struct nlattr * const *nla = ctx->nla;
7550 struct nft_flowtable_hook flowtable_hook;
7551 struct nft_hook *hook, *next;
7552 struct nft_trans *trans;
7553 bool unregister = false;
7b35582c 7554 u32 flags;
78d9f48f
PNA		 7555 int err;
7556
7557 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7558 &flowtable_hook, flowtable, false);
78d9f48f
PNA		 7559 if (err < 0)
7560 return err;
7561
7562 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7563 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
7564 list_del(&hook->list);
7565 kfree(hook);
7566 }
7567 }
7568
7b35582c
PNA		 7569 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7570 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 7571 if (flags & ~NFT_FLOWTABLE_MASK) {
7572 err = -EOPNOTSUPP;
7573 goto err_flowtable_update_hook;
7574 }
7b35582c 7575 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 7576 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
7577 err = -EOPNOTSUPP;
7578 goto err_flowtable_update_hook;
7579 }
7b35582c
PNA		 7580 } else {
7581 flags = flowtable->data.flags;
7582 }
7583
78d9f48f
PNA		 7584 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
7585 &flowtable_hook.list, flowtable);
7586 if (err < 0)
7587 goto err_flowtable_update_hook;
7588
7589 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
7590 sizeof(struct nft_trans_flowtable));
7591 if (!trans) {
7592 unregister = true;
7593 err = -ENOMEM;
7594 goto err_flowtable_update_hook;
7595 }
7596
7b35582c 7597 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 7598 nft_trans_flowtable(trans) = flowtable;
7599 nft_trans_flowtable_update(trans) = true;
7600 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7601 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
7602
0854db2a 7603 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 7604
7605 return 0;
7606
7607err_flowtable_update_hook:
7608 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7609 if (unregister)
7610 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
7611 list_del_rcu(&hook->list);
7612 kfree_rcu(hook, rcu);
7613 }
7614
7615 return err;
7616
7617}
7618
7dab8ee3
PNA		 7619static int nf_tables_newflowtable(struct sk_buff *skb,
7620 const struct nfnl_info *info,
7621 const struct nlattr * const nla[])
3b49e2e9 7622{
7dab8ee3 7623 struct netlink_ext_ack *extack = info->extack;
d9246a53 7624 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 7625 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7626 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7627 const struct nf_flowtable_type *type;
3f0465a9
PNA		 7628 struct nft_flowtable *flowtable;
7629 struct nft_hook *hook, *next;
7dab8ee3 7630 struct net *net = info->net;
3b49e2e9
PNA		 7631 struct nft_table *table;
7632 struct nft_ctx ctx;
3f0465a9 7633 int err;
3b49e2e9
PNA		 7634
7635 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7636 !nla[NFTA_FLOWTABLE_NAME] ||
7637 !nla[NFTA_FLOWTABLE_HOOK])
7638 return -EINVAL;
7639
cac20fcd 7640 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 7641 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7642 if (IS_ERR(table)) {
7643 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 7644 return PTR_ERR(table);
36dd1bcc 7645 }
3b49e2e9 7646
cac20fcd
PNA		 7647 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
7648 genmask);
3b49e2e9
PNA		 7649 if (IS_ERR(flowtable)) {
7650 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 7651 if (err != -ENOENT) {
7652 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 7653 return err;
36dd1bcc 7654 }
3b49e2e9 7655 } else {
7dab8ee3 7656 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7657 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 7658 return -EEXIST;
36dd1bcc 7659 }
3b49e2e9 7660
7dab8ee3 7661 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 7662
7dab8ee3 7663 return nft_flowtable_update(&ctx, info->nlh, flowtable);
3b49e2e9
PNA		 7664 }
7665
7dab8ee3 7666 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 7667
33758c89 7668 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 7669 if (!flowtable)
7670 return -ENOMEM;
7671
7672 flowtable->table = table;
3ecbfd65 7673 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 7674 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 7675
33758c89 7676 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 7677 if (!flowtable->name) {
7678 err = -ENOMEM;
7679 goto err1;
7680 }
7681
452238e8 7682 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 7683 if (IS_ERR(type)) {
7684 err = PTR_ERR(type);
7685 goto err2;
7686 }
7687
8bb69f3b
PNA		 7688 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7689 flowtable->data.flags =
7690 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 7691 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
7692 err = -EOPNOTSUPP;
8bb69f3b 7693 goto err3;
7e6136f1 7694 }
8bb69f3b
PNA		 7695 }
7696
7697 write_pnet(&flowtable->data.net, net);
3b49e2e9 7698 flowtable->data.type = type;
a268de77 7699 err = type->init(&flowtable->data);
3b49e2e9
PNA		 7700 if (err < 0)
7701 goto err3;
7702
d9246a53 7703 err = nft_flowtable_parse_hook(&ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7704 &flowtable_hook, flowtable, true);
3b49e2e9 7705 if (err < 0)
a268de77 7706 goto err4;
3b49e2e9 7707
d9246a53
PNA		 7708 list_splice(&flowtable_hook.list, &flowtable->hook_list);
7709 flowtable->data.priority = flowtable_hook.priority;
7710 flowtable->hooknum = flowtable_hook.num;
7711
f9382669
PNA		 7712 err = nft_register_flowtable_net_hooks(ctx.net, table,
7713 &flowtable->hook_list,
7714 flowtable);
2d285f26 7715 if (err < 0) {
389a2cbc 7716 nft_flowtable_hooks_destroy(&flowtable->hook_list);
3f0465a9 7717 goto err4;
2d285f26 7718 }
3b49e2e9
PNA		 7719
7720 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
7721 if (err < 0)
3f0465a9 7722 goto err5;
3b49e2e9
PNA		 7723
7724 list_add_tail_rcu(&flowtable->list, &table->flowtables);
7725 table->use++;
7726
7727 return 0;
a268de77 7728err5:
3f0465a9 7729 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 7730 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7731 list_del_rcu(&hook->list);
7732 kfree_rcu(hook, rcu);
7733 }
a268de77
FF		 7734err4:
7735 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 7736err3:
7737 module_put(type->owner);
7738err2:
7739 kfree(flowtable->name);
7740err1:
7741 kfree(flowtable);
7742 return err;
7743}
7744
3003055f
PNA		 7745static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
7746{
7747 struct nft_hook *this, *next;
7748
7749 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
7750 list_del(&this->list);
7751 kfree(this);
7752 }
7753}
7754
abadb2f8
PNA		 7755static int nft_delflowtable_hook(struct nft_ctx *ctx,
7756 struct nft_flowtable *flowtable)
7757{
7758 const struct nlattr * const *nla = ctx->nla;
7759 struct nft_flowtable_hook flowtable_hook;
b6d9014a 7760 LIST_HEAD(flowtable_del_list);
3003055f 7761 struct nft_hook *this, *hook;
abadb2f8
PNA		 7762 struct nft_trans *trans;
7763 int err;
7764
7765 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7766 &flowtable_hook, flowtable, false);
abadb2f8
PNA		 7767 if (err < 0)
7768 return err;
7769
3003055f 7770 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 7771 hook = nft_hook_list_find(&flowtable->hook_list, this);
7772 if (!hook) {
7773 err = -ENOENT;
7774 goto err_flowtable_del_hook;
7775 }
b6d9014a 7776 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 7777 }
7778
7779 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
7780 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 7781 if (!trans) {
7782 err = -ENOMEM;
7783 goto err_flowtable_del_hook;
7784 }
abadb2f8
PNA		 7785
7786 nft_trans_flowtable(trans) = flowtable;
7787 nft_trans_flowtable_update(trans) = true;
7788 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 7789 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 7790 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 7791
0854db2a 7792 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 7793
7794 return 0;
7795
7796err_flowtable_del_hook:
b6d9014a 7797 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 7798 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 7799
7800 return err;
7801}
7802
7dab8ee3
PNA		 7803static int nf_tables_delflowtable(struct sk_buff *skb,
7804 const struct nfnl_info *info,
7805 const struct nlattr * const nla[])
3b49e2e9 7806{
7dab8ee3
PNA		 7807 struct netlink_ext_ack *extack = info->extack;
7808 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7809 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7810 struct nft_flowtable *flowtable;
7dab8ee3 7811 struct net *net = info->net;
36dd1bcc 7812 const struct nlattr *attr;
3b49e2e9
PNA		 7813 struct nft_table *table;
7814 struct nft_ctx ctx;
7815
e603ea4b
PNA		 7816 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7817 (!nla[NFTA_FLOWTABLE_NAME] &&
7818 !nla[NFTA_FLOWTABLE_HANDLE]))
7819 return -EINVAL;
7820
cac20fcd 7821 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 7822 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7823 if (IS_ERR(table)) {
7824 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 7825 return PTR_ERR(table);
36dd1bcc 7826 }
3b49e2e9 7827
36dd1bcc
PNA		 7828 if (nla[NFTA_FLOWTABLE_HANDLE]) {
7829 attr = nla[NFTA_FLOWTABLE_HANDLE];
7830 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
7831 } else {
7832 attr = nla[NFTA_FLOWTABLE_NAME];
7833 flowtable = nft_flowtable_lookup(table, attr, genmask);
7834 }
7835
7836 if (IS_ERR(flowtable)) {
7837 NL_SET_BAD_ATTR(extack, attr);
7838 return PTR_ERR(flowtable);
7839 }
abadb2f8 7840
7dab8ee3 7841 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 7842
7843 if (nla[NFTA_FLOWTABLE_HOOK])
7844 return nft_delflowtable_hook(&ctx, flowtable);
7845
36dd1bcc
PNA		 7846 if (flowtable->use > 0) {
7847 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 7848 return -EBUSY;
36dd1bcc 7849 }
3b49e2e9 7850
3b49e2e9
PNA		 7851 return nft_delflowtable(&ctx, flowtable);
7852}
7853
7854static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
7855 u32 portid, u32 seq, int event,
7856 u32 flags, int family,
c42d8bda
PNA		 7857 struct nft_flowtable *flowtable,
7858 struct list_head *hook_list)
3b49e2e9
PNA		 7859{
7860 struct nlattr *nest, *nest_devs;
3f0465a9 7861 struct nft_hook *hook;
3b49e2e9 7862 struct nlmsghdr *nlh;
3b49e2e9
PNA		 7863
7864 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7865 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7866 NFNETLINK_V0, nft_base_seq(net));
7867 if (!nlh)
3b49e2e9
PNA		 7868 goto nla_put_failure;
7869
3b49e2e9
PNA		 7870 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
7871 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65
HS		 7872 nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
7873 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
8bb69f3b
PNA		 7874 NFTA_FLOWTABLE_PAD) ||
7875 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 7876 goto nla_put_failure;
7877
ae0be8de 7878 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 7879 if (!nest)
7880 goto nla_put_failure;
3b49e2e9 7881 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 7882 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 7883 goto nla_put_failure;
7884
ae0be8de 7885 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 7886 if (!nest_devs)
7887 goto nla_put_failure;
7888
c42d8bda 7889 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 7890 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 7891 goto nla_put_failure;
7892 }
7893 nla_nest_end(skb, nest_devs);
7894 nla_nest_end(skb, nest);
7895
7896 nlmsg_end(skb, nlh);
7897 return 0;
7898
7899nla_put_failure:
7900 nlmsg_trim(skb, nlh);
7901 return -1;
7902}
7903
7904struct nft_flowtable_filter {
7905 char *table;
7906};
7907
7908static int nf_tables_dump_flowtable(struct sk_buff *skb,
7909 struct netlink_callback *cb)
7910{
7911 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
7912 struct nft_flowtable_filter *filter = cb->data;
7913 unsigned int idx = 0, s_idx = cb->args[0];
7914 struct net *net = sock_net(skb->sk);
7915 int family = nfmsg->nfgen_family;
7916 struct nft_flowtable *flowtable;
0854db2a 7917 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 7918 const struct nft_table *table;
7919
7920 rcu_read_lock();
d59d2f82 7921 nft_net = nft_pernet(net);
34002783 7922 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 7923
0854db2a 7924 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7925 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 7926 continue;
7927
36596dad
PNA		 7928 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
7929 if (!nft_is_active(net, flowtable))
7930 goto cont;
7931 if (idx < s_idx)
7932 goto cont;
7933 if (idx > s_idx)
7934 memset(&cb->args[1], 0,
7935 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7936 if (filter && filter->table &&
36596dad
PNA		 7937 strcmp(filter->table, table->name))
7938 goto cont;
3b49e2e9 7939
36596dad
PNA		 7940 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
7941 cb->nlh->nlmsg_seq,
7942 NFT_MSG_NEWFLOWTABLE,
7943 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda
PNA		 7944 table->family,
7945 flowtable,
7946 &flowtable->hook_list) < 0)
36596dad 7947 goto done;
3b49e2e9 7948
36596dad 7949 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 7950cont:
36596dad 7951 idx++;
3b49e2e9
PNA		 7952 }
7953 }
7954done:
7955 rcu_read_unlock();
7956
7957 cb->args[0] = idx;
7958 return skb->len;
7959}
7960
90fd131a 7961static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 7962{
90fd131a
FW		 7963 const struct nlattr * const *nla = cb->data;
7964 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 7965
90fd131a
FW		 7966 if (nla[NFTA_FLOWTABLE_TABLE]) {
7967 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7968 if (!filter)
7969 return -ENOMEM;
3b49e2e9 7970
90fd131a
FW		 7971 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
7972 GFP_ATOMIC);
7973 if (!filter->table) {
7974 kfree(filter);
7975 return -ENOMEM;
7976 }
7977 }
3b49e2e9 7978
90fd131a 7979 cb->data = filter;
3b49e2e9
PNA		 7980 return 0;
7981}
7982
90fd131a 7983static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 7984{
90fd131a 7985 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 7986
3b49e2e9 7987 if (!filter)
90fd131a 7988 return 0;
3b49e2e9 7989
90fd131a
FW		 7990 kfree(filter->table);
7991 kfree(filter);
7992
7993 return 0;
3b49e2e9
PNA		 7994}
7995
d9adf22a 7996/* called with rcu_read_lock held */
797d4980
PNA		 7997static int nf_tables_getflowtable(struct sk_buff *skb,
7998 const struct nfnl_info *info,
7999 const struct nlattr * const nla[])
3b49e2e9 8000{
797d4980 8001 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8002 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8003 struct nft_flowtable *flowtable;
3b49e2e9 8004 const struct nft_table *table;
797d4980 8005 struct net *net = info->net;
3b49e2e9
PNA		 8006 struct sk_buff *skb2;
8007 int err;
8008
797d4980 8009 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8010 struct netlink_dump_control c = {
90fd131a 8011 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8012 .dump = nf_tables_dump_flowtable,
8013 .done = nf_tables_dump_flowtable_done,
d9adf22a 8014 .module = THIS_MODULE,
90fd131a 8015 .data = (void *)nla,
3b49e2e9
PNA		 8016 };
8017
797d4980 8018 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8019 }
8020
8021 if (!nla[NFTA_FLOWTABLE_NAME])
8022 return -EINVAL;
8023
cac20fcd 8024 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8025 genmask, 0);
3b49e2e9
PNA		 8026 if (IS_ERR(table))
8027 return PTR_ERR(table);
8028
cac20fcd
PNA		 8029 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8030 genmask);
03a0120f 8031 if (IS_ERR(flowtable))
3b49e2e9
PNA		 8032 return PTR_ERR(flowtable);
8033
d9adf22a 8034 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8035 if (!skb2)
8036 return -ENOMEM;
8037
8038 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8039 info->nlh->nlmsg_seq,
3b49e2e9 8040 NFT_MSG_NEWFLOWTABLE, 0, family,
c42d8bda 8041 flowtable, &flowtable->hook_list);
3b49e2e9 8042 if (err < 0)
ee921183 8043 goto err_fill_flowtable_info;
3b49e2e9 8044
ee921183
PNA		 8045 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8046
8047err_fill_flowtable_info:
3b49e2e9
PNA		 8048 kfree_skb(skb2);
8049 return err;
8050}
8051
8052static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8053 struct nft_flowtable *flowtable,
c42d8bda 8054 struct list_head *hook_list,
3b49e2e9
PNA		 8055 int event)
8056{
d59d2f82 8057 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8058 struct sk_buff *skb;
6fb721cf 8059 u16 flags = 0;
3b49e2e9
PNA		 8060 int err;
8061
dceababa 8062 if (!ctx->report &&
3b49e2e9
PNA		 8063 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8064 return;
8065
8066 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8067 if (skb == NULL)
8068 goto err;
8069
6fb721cf
PNA		 8070 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8071 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8072
3b49e2e9 8073 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8074 ctx->seq, event, flags,
c42d8bda 8075 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8076 if (err < 0) {
8077 kfree_skb(skb);
8078 goto err;
8079 }
8080
0854db2a 8081 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8082 return;
8083err:
8084 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8085}
8086
3b49e2e9
PNA		 8087static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8088{
3f0465a9
PNA		 8089 struct nft_hook *hook, *next;
8090
5acab914 8091 flowtable->data.type->free(&flowtable->data);
3f0465a9 8092 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8093 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8094 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8095 list_del_rcu(&hook->list);
8096 kfree(hook);
8097 }
3b49e2e9 8098 kfree(flowtable->name);
3b49e2e9 8099 module_put(flowtable->data.type->owner);
a12486eb 8100 kfree(flowtable);
3b49e2e9
PNA		 8101}
8102
84d7fce6
PNA		 8103static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8104 u32 portid, u32 seq)
8105{
d59d2f82 8106 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8107 struct nlmsghdr *nlh;
784b4e61 8108 char buf[TASK_COMM_LEN];
dedb67c4 8109 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8110
19c28b13
PNA		 8111 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8112 NFNETLINK_V0, nft_base_seq(net));
8113 if (!nlh)
84d7fce6
PNA		 8114 goto nla_put_failure;
8115
0854db2a 8116 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8117 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8118 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8119 goto nla_put_failure;
8120
053c095a
JB		 8121 nlmsg_end(skb, nlh);
8122 return 0;
84d7fce6
PNA		 8123
8124nla_put_failure:
8125 nlmsg_trim(skb, nlh);
8126 return -EMSGSIZE;
8127}
8128
3b49e2e9
PNA		 8129static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8130 struct nft_flowtable *flowtable)
8131{
3f0465a9 8132 struct nft_hook *hook;
3b49e2e9 8133
3f0465a9
PNA		 8134 list_for_each_entry(hook, &flowtable->hook_list, list) {
8135 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8136 continue;
8137
5acab914 8138 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8139 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8140 list_del_rcu(&hook->list);
8141 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8142 break;
8143 }
8144}
8145
8146static int nf_tables_flowtable_event(struct notifier_block *this,
8147 unsigned long event, void *ptr)
8148{
8149 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8150 struct nft_flowtable *flowtable;
0854db2a 8151 struct nftables_pernet *nft_net;
3b49e2e9 8152 struct nft_table *table;
0a2cf5ee 8153 struct net *net;
3b49e2e9
PNA		 8154
8155 if (event != NETDEV_UNREGISTER)
8156 return 0;
8157
6a48de01 8158 net = dev_net(dev);
d59d2f82 8159 nft_net = nft_pernet(net);
0854db2a
FW		 8160 mutex_lock(&nft_net->commit_mutex);
8161 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8162 list_for_each_entry(flowtable, &table->flowtables, list) {
8163 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8164 }
8165 }
0854db2a 8166 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8167
3b49e2e9
PNA		 8168 return NOTIFY_DONE;
8169}
8170
8171static struct notifier_block nf_tables_flowtable_notifier = {
8172 .notifier_call = nf_tables_flowtable_event,
8173};
8174
25e94a99
PNA		 8175static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8176 int event)
84d7fce6
PNA		 8177{
8178 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8179 struct sk_buff *skb2;
8180 int err;
8181
dceababa 8182 if (!nlmsg_report(nlh) &&
84d7fce6 8183 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8184 return;
84d7fce6 8185
84d7fce6
PNA		 8186 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8187 if (skb2 == NULL)
8188 goto err;
8189
8190 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8191 nlh->nlmsg_seq);
8192 if (err < 0) {
8193 kfree_skb(skb2);
8194 goto err;
8195 }
8196
25e94a99
PNA		 8197 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8198 nlmsg_report(nlh), GFP_KERNEL);
8199 return;
84d7fce6 8200err:
25e94a99
PNA		 8201 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8202 -ENOBUFS);
84d7fce6
PNA		 8203}
8204
797d4980
PNA		 8205static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8206 const struct nlattr * const nla[])
84d7fce6 8207{
84d7fce6
PNA		 8208 struct sk_buff *skb2;
8209 int err;
8210
d9adf22a 8211 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8212 if (skb2 == NULL)
8213 return -ENOMEM;
8214
797d4980
PNA		 8215 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8216 info->nlh->nlmsg_seq);
84d7fce6 8217 if (err < 0)
ee921183 8218 goto err_fill_gen_info;
84d7fce6 8219
797d4980 8220 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8221
8222err_fill_gen_info:
84d7fce6
PNA		 8223 kfree_skb(skb2);
8224 return err;
8225}
8226
96518518
PM		 8227static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8228 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8229 .call = nf_tables_newtable,
8230 .type = NFNL_CB_BATCH,
96518518
PM		 8231 .attr_count = NFTA_TABLE_MAX,
8232 .policy = nft_table_policy,
8233 },
8234 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8235 .call = nf_tables_gettable,
8236 .type = NFNL_CB_RCU,
96518518
PM		 8237 .attr_count = NFTA_TABLE_MAX,
8238 .policy = nft_table_policy,
8239 },
8240 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8241 .call = nf_tables_deltable,
8242 .type = NFNL_CB_BATCH,
96518518
PM		 8243 .attr_count = NFTA_TABLE_MAX,
8244 .policy = nft_table_policy,
8245 },
8246 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8247 .call = nf_tables_newchain,
8248 .type = NFNL_CB_BATCH,
96518518
PM		 8249 .attr_count = NFTA_CHAIN_MAX,
8250 .policy = nft_chain_policy,
8251 },
8252 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8253 .call = nf_tables_getchain,
8254 .type = NFNL_CB_RCU,
96518518
PM		 8255 .attr_count = NFTA_CHAIN_MAX,
8256 .policy = nft_chain_policy,
8257 },
8258 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 8259 .call = nf_tables_delchain,
8260 .type = NFNL_CB_BATCH,
96518518
PM		 8261 .attr_count = NFTA_CHAIN_MAX,
8262 .policy = nft_chain_policy,
8263 },
8264 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 8265 .call = nf_tables_newrule,
8266 .type = NFNL_CB_BATCH,
96518518
PM		 8267 .attr_count = NFTA_RULE_MAX,
8268 .policy = nft_rule_policy,
8269 },
8270 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 8271 .call = nf_tables_getrule,
8272 .type = NFNL_CB_RCU,
96518518
PM		 8273 .attr_count = NFTA_RULE_MAX,
8274 .policy = nft_rule_policy,
8275 },
8276 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 8277 .call = nf_tables_delrule,
8278 .type = NFNL_CB_BATCH,
96518518
PM		 8279 .attr_count = NFTA_RULE_MAX,
8280 .policy = nft_rule_policy,
8281 },
20a69341 8282 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 8283 .call = nf_tables_newset,
8284 .type = NFNL_CB_BATCH,
20a69341
PM		 8285 .attr_count = NFTA_SET_MAX,
8286 .policy = nft_set_policy,
8287 },
8288 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 8289 .call = nf_tables_getset,
8290 .type = NFNL_CB_RCU,
20a69341
PM		 8291 .attr_count = NFTA_SET_MAX,
8292 .policy = nft_set_policy,
8293 },
8294 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 8295 .call = nf_tables_delset,
8296 .type = NFNL_CB_BATCH,
20a69341
PM		 8297 .attr_count = NFTA_SET_MAX,
8298 .policy = nft_set_policy,
8299 },
8300 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 8301 .call = nf_tables_newsetelem,
8302 .type = NFNL_CB_BATCH,
20a69341
PM		 8303 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8304 .policy = nft_set_elem_list_policy,
8305 },
8306 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 8307 .call = nf_tables_getsetelem,
8308 .type = NFNL_CB_RCU,
20a69341
PM		 8309 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8310 .policy = nft_set_elem_list_policy,
8311 },
8312 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 8313 .call = nf_tables_delsetelem,
8314 .type = NFNL_CB_BATCH,
20a69341
PM		 8315 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8316 .policy = nft_set_elem_list_policy,
8317 },
84d7fce6 8318 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 8319 .call = nf_tables_getgen,
8320 .type = NFNL_CB_RCU,
84d7fce6 8321 },
e5009240 8322 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 8323 .call = nf_tables_newobj,
8324 .type = NFNL_CB_BATCH,
e5009240
PNA		 8325 .attr_count = NFTA_OBJ_MAX,
8326 .policy = nft_obj_policy,
8327 },
8328 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 8329 .call = nf_tables_getobj,
8330 .type = NFNL_CB_RCU,
e5009240
PNA		 8331 .attr_count = NFTA_OBJ_MAX,
8332 .policy = nft_obj_policy,
8333 },
8334 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 8335 .call = nf_tables_delobj,
8336 .type = NFNL_CB_BATCH,
e5009240
PNA		 8337 .attr_count = NFTA_OBJ_MAX,
8338 .policy = nft_obj_policy,
8339 },
43da04a5 8340 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 8341 .call = nf_tables_getobj,
8342 .type = NFNL_CB_RCU,
43da04a5
PNA		 8343 .attr_count = NFTA_OBJ_MAX,
8344 .policy = nft_obj_policy,
8345 },
3b49e2e9 8346 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 8347 .call = nf_tables_newflowtable,
8348 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8349 .attr_count = NFTA_FLOWTABLE_MAX,
8350 .policy = nft_flowtable_policy,
8351 },
8352 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 8353 .call = nf_tables_getflowtable,
8354 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 8355 .attr_count = NFTA_FLOWTABLE_MAX,
8356 .policy = nft_flowtable_policy,
8357 },
8358 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 8359 .call = nf_tables_delflowtable,
8360 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8361 .attr_count = NFTA_FLOWTABLE_MAX,
8362 .policy = nft_flowtable_policy,
8363 },
96518518
PM		 8364};
8365
a654de8f
PNA		 8366static int nf_tables_validate(struct net *net)
8367{
d59d2f82 8368 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 8369 struct nft_table *table;
8370
0854db2a 8371 switch (nft_net->validate_state) {
a654de8f
PNA		 8372 case NFT_VALIDATE_SKIP:
8373 break;
8374 case NFT_VALIDATE_NEED:
8375 nft_validate_state_update(net, NFT_VALIDATE_DO);
954d8297 8376 fallthrough;
a654de8f 8377 case NFT_VALIDATE_DO:
0854db2a 8378 list_for_each_entry(table, &nft_net->tables, list) {
a654de8f
PNA		 8379 if (nft_table_validate(net, table) < 0)
8380 return -EAGAIN;
8381 }
8382 break;
8383 }
8384
8385 return 0;
8386}
8387
66293c46
FW		 8388/* a drop policy has to be deferred until all rules have been activated,
8389 * otherwise a large ruleset that contains a drop-policy base chain will
8390 * cause all packets to get dropped until the full transaction has been
8391 * processed.
8392 *
8393 * We defer the drop policy until the transaction has been finalized.
8394 */
8395static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8396{
8397 struct nft_base_chain *basechain;
8398
8399 if (nft_trans_chain_policy(trans) != NF_DROP)
8400 return;
8401
8402 if (!nft_is_base_chain(trans->ctx.chain))
8403 return;
8404
8405 basechain = nft_base_chain(trans->ctx.chain);
8406 basechain->policy = NF_DROP;
8407}
8408
91c7b38d
PNA		 8409static void nft_chain_commit_update(struct nft_trans *trans)
8410{
8411 struct nft_base_chain *basechain;
8412
1b2470e5
FW		 8413 if (nft_trans_chain_name(trans)) {
8414 rhltable_remove(&trans->ctx.table->chains_ht,
8415 &trans->ctx.chain->rhlhead,
8416 nft_chain_ht_params);
d71efb59 8417 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 8418 rhltable_insert_key(&trans->ctx.table->chains_ht,
8419 trans->ctx.chain->name,
8420 &trans->ctx.chain->rhlhead,
8421 nft_chain_ht_params);
8422 }
91c7b38d 8423
f323d954 8424 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 8425 return;
8426
53315ac6
FW		 8427 nft_chain_stats_replace(trans);
8428
91c7b38d 8429 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 8430
8431 switch (nft_trans_chain_policy(trans)) {
8432 case NF_DROP:
8433 case NF_ACCEPT:
8434 basechain->policy = nft_trans_chain_policy(trans);
8435 break;
8436 }
8437}
8438
d62d0ba9
FFM		 8439static void nft_obj_commit_update(struct nft_trans *trans)
8440{
8441 struct nft_object *newobj;
8442 struct nft_object *obj;
8443
8444 obj = nft_trans_obj(trans);
8445 newobj = nft_trans_obj_newobj(trans);
8446
9fedd894
FFM		 8447 if (obj->ops->update)
8448 obj->ops->update(obj, newobj);
d62d0ba9 8449
dad3bdee 8450 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 8451}
8452
2f99aa31 8453static void nft_commit_release(struct nft_trans *trans)
c7c32e72 8454{
c7c32e72
PNA		 8455 switch (trans->msg_type) {
8456 case NFT_MSG_DELTABLE:
8457 nf_tables_table_destroy(&trans->ctx);
8458 break;
9f8aac0b 8459 case NFT_MSG_NEWCHAIN:
53315ac6 8460 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 8461 kfree(nft_trans_chain_name(trans));
8462 break;
c7c32e72 8463 case NFT_MSG_DELCHAIN:
43a605f2 8464 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 8465 break;
8466 case NFT_MSG_DELRULE:
9dd732e0
PNA		 8467 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
8468 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
8469
c7c32e72
PNA		 8470 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8471 break;
8472 case NFT_MSG_DELSET:
0c2a85ed 8473 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 8474 break;
61edafbb 8475 case NFT_MSG_DELSETELEM:
3453c927
PNA		 8476 nf_tables_set_elem_destroy(&trans->ctx,
8477 nft_trans_elem_set(trans),
59105446 8478 nft_trans_elem(trans).priv);
61edafbb 8479 break;
e5009240 8480 case NFT_MSG_DELOBJ:
00bfb320 8481 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 8482 break;
3b49e2e9 8483 case NFT_MSG_DELFLOWTABLE:
abadb2f8
PNA		 8484 if (nft_trans_flowtable_update(trans))
8485 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
8486 else
8487 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 8488 break;
c7c32e72 8489 }
0935d558
FW		 8490
8491 if (trans->put_net)
8492 put_net(trans->ctx.net);
8493
c7c32e72
PNA		 8494 kfree(trans);
8495}
8496
0935d558 8497static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 8498{
8499 struct nft_trans *trans, *next;
0935d558
FW		 8500 LIST_HEAD(head);
8501
8502 spin_lock(&nf_tables_destroy_list_lock);
8503 list_splice_init(&nf_tables_destroy_list, &head);
8504 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 8505
0935d558 8506 if (list_empty(&head))
2f99aa31
FW		 8507 return;
8508
8509 synchronize_rcu();
8510
0935d558 8511 list_for_each_entry_safe(trans, next, &head, list) {
2f99aa31
FW		 8512 list_del(&trans->list);
8513 nft_commit_release(trans);
8514 }
8515}
8516
ffe8923f
FW		 8517void nf_tables_trans_destroy_flush_work(void)
8518{
8519 flush_work(&trans_destroy_work);
8520}
8521EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
8522
ed5f85d4
PNA		 8523static bool nft_expr_reduce(struct nft_regs_track *track,
8524 const struct nft_expr *expr)
8525{
9e539c5b 8526 return false;
ed5f85d4
PNA		 8527}
8528
0cbc06b3
FW		 8529static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
8530{
2c865a8a 8531 const struct nft_expr *expr, *last;
12e4ecfa 8532 struct nft_regs_track track = {};
2c865a8a
PNA		 8533 unsigned int size, data_size;
8534 void *data, *data_boundary;
8535 struct nft_rule_dp *prule;
0cbc06b3 8536 struct nft_rule *rule;
0cbc06b3
FW		 8537
8538 /* already handled or inactive chain? */
2c865a8a 8539 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 8540 return 0;
8541
63045bfd 8542 data_size = 0;
10377d42 8543 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8544 if (nft_is_active_next(net, rule)) {
8545 data_size += sizeof(*prule) + rule->dlen;
8546 if (data_size > INT_MAX)
8547 return -ENOMEM;
8548 }
0cbc06b3 8549 }
2c865a8a 8550 data_size += offsetof(struct nft_rule_dp, data); /* last rule */
0cbc06b3 8551
2c865a8a
PNA		 8552 chain->blob_next = nf_tables_chain_alloc_rules(data_size);
8553 if (!chain->blob_next)
0cbc06b3
FW		 8554 return -ENOMEM;
8555
2c865a8a
PNA		 8556 data = (void *)chain->blob_next->data;
8557 data_boundary = data + data_size;
8558 size = 0;
8559
10377d42 8560 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8561 if (!nft_is_active_next(net, rule))
8562 continue;
8563
8564 prule = (struct nft_rule_dp *)data;
8565 data += offsetof(struct nft_rule_dp, data);
8566 if (WARN_ON_ONCE(data > data_boundary))
8567 return -ENOMEM;
8568
12e4ecfa 8569 size = 0;
fe75e84a 8570 track.last = nft_expr_last(rule);
2c865a8a 8571 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 8572 track.cur = expr;
8573
ed5f85d4 8574 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 8575 expr = track.cur;
8576 continue;
8577 }
8578
2c865a8a
PNA		 8579 if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
8580 return -ENOMEM;
8581
8582 memcpy(data + size, expr, expr->ops->size);
8583 size += expr->ops->size;
8584 }
8585 if (WARN_ON_ONCE(size >= 1 << 12))
8586 return -ENOMEM;
8587
8588 prule->handle = rule->handle;
8589 prule->dlen = size;
8590 prule->is_last = 0;
8591
8592 data += size;
8593 size = 0;
8594 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 8595 }
8596
2c865a8a
PNA		 8597 prule = (struct nft_rule_dp *)data;
8598 data += offsetof(struct nft_rule_dp, data);
8599 if (WARN_ON_ONCE(data > data_boundary))
8600 return -ENOMEM;
8601
8602 nft_last_rule(chain->blob_next, prule);
8603
0cbc06b3
FW		 8604 return 0;
8605}
8606
8607static void nf_tables_commit_chain_prepare_cancel(struct net *net)
8608{
d59d2f82 8609 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 8610 struct nft_trans *trans, *next;
8611
0854db2a 8612 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 8613 struct nft_chain *chain = trans->ctx.chain;
8614
8615 if (trans->msg_type == NFT_MSG_NEWRULE ||
8616 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 8617 kvfree(chain->blob_next);
8618 chain->blob_next = NULL;
0cbc06b3
FW		 8619 }
8620 }
8621}
8622
8623static void __nf_tables_commit_chain_free_rules_old(struct rcu_head *h)
8624{
8625 struct nft_rules_old *o = container_of(h, struct nft_rules_old, h);
8626
2c865a8a 8627 kvfree(o->blob);
0cbc06b3
FW		 8628}
8629
2c865a8a 8630static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 8631{
0cbc06b3
FW		 8632 struct nft_rules_old *old;
8633
2c865a8a
PNA		 8634 /* rcu_head is after end marker */
8635 old = (void *)blob + sizeof(*blob) + blob->size;
8636 old->blob = blob;
0cbc06b3
FW		 8637
8638 call_rcu(&old->h, __nf_tables_commit_chain_free_rules_old);
8639}
8640
0fb39bbe 8641static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 8642{
2c865a8a 8643 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 8644 bool next_genbit;
8645
8646 next_genbit = nft_gencursor_next(net);
8647
2c865a8a 8648 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 8649 lockdep_commit_lock_is_held(net));
2c865a8a 8650 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 8651 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 8652
8653 /* No changes to this chain? */
2c865a8a 8654 if (chain->blob_next == NULL) {
0cbc06b3
FW		 8655 /* chain had no change in last or next generation */
8656 if (g0 == g1)
8657 return;
8658 /*
8659 * chain had no change in this generation; make sure next
8660 * one uses same rules as current generation.
8661 */
8662 if (next_genbit) {
2c865a8a 8663 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 8664 nf_tables_commit_chain_free_rules_old(g1);
8665 } else {
2c865a8a 8666 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 8667 nf_tables_commit_chain_free_rules_old(g0);
8668 }
8669
8670 return;
8671 }
8672
8673 if (next_genbit)
2c865a8a 8674 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 8675 else
2c865a8a 8676 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 8677
2c865a8a 8678 chain->blob_next = NULL;
0cbc06b3
FW		 8679
8680 if (g0 == g1)
8681 return;
8682
8683 if (next_genbit)
8684 nf_tables_commit_chain_free_rules_old(g1);
8685 else
8686 nf_tables_commit_chain_free_rules_old(g0);
8687}
8688
d152159b
FW		 8689static void nft_obj_del(struct nft_object *obj)
8690{
4d44175a 8691 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 8692 list_del_rcu(&obj->list);
8693}
8694
d0e2c7de 8695void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 8696{
8697 struct nft_table *table = chain->table;
8698
8699 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
8700 nft_chain_ht_params));
8701 list_del_rcu(&chain->list);
8702}
8703
eb014de4
PNA		 8704static void nf_tables_module_autoload_cleanup(struct net *net)
8705{
d59d2f82 8706 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 8707 struct nft_module_request *req, *next;
8708
0854db2a
FW		 8709 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
8710 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 8711 WARN_ON_ONCE(!req->done);
8712 list_del(&req->list);
8713 kfree(req);
8714 }
8715}
8716
0935d558
FW		 8717static void nf_tables_commit_release(struct net *net)
8718{
d59d2f82 8719 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 8720 struct nft_trans *trans;
8721
8722 /* all side effects have to be made visible.
8723 * For example, if a chain named 'foo' has been deleted, a
8724 * new transaction must not find it anymore.
8725 *
8726 * Memory reclaim happens asynchronously from work queue
8727 * to prevent expensive synchronize_rcu() in commit phase.
8728 */
0854db2a 8729 if (list_empty(&nft_net->commit_list)) {
eb014de4 8730 nf_tables_module_autoload_cleanup(net);
0854db2a 8731 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 8732 return;
8733 }
8734
0854db2a 8735 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 8736 struct nft_trans, list);
8737 get_net(trans->ctx.net);
8738 WARN_ON_ONCE(trans->put_net);
8739
8740 trans->put_net = true;
8741 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 8742 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 8743 spin_unlock(&nf_tables_destroy_list_lock);
8744
eb014de4 8745 nf_tables_module_autoload_cleanup(net);
0935d558 8746 schedule_work(&trans_destroy_work);
ffe8923f 8747
0854db2a 8748 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 8749}
8750
67cc570e
PNA		 8751static void nft_commit_notify(struct net *net, u32 portid)
8752{
d59d2f82 8753 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 8754 struct sk_buff *batch_skb = NULL, *nskb, *skb;
8755 unsigned char *data;
8756 int len;
8757
0854db2a 8758 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 8759 if (!batch_skb) {
8760new_batch:
8761 batch_skb = skb;
8762 len = NLMSG_GOODSIZE - skb->len;
8763 list_del(&skb->list);
8764 continue;
8765 }
8766 len -= skb->len;
8767 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
8768 data = skb_put(batch_skb, skb->len);
8769 memcpy(data, skb->data, skb->len);
8770 list_del(&skb->list);
8771 kfree_skb(skb);
8772 continue;
8773 }
8774 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8775 NFT_CB(batch_skb).report, GFP_KERNEL);
8776 goto new_batch;
8777 }
8778
8779 if (batch_skb) {
8780 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8781 NFT_CB(batch_skb).report, GFP_KERNEL);
8782 }
8783
0854db2a 8784 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 8785}
8786
c520292f
RGB		 8787static int nf_tables_commit_audit_alloc(struct list_head *adl,
8788 struct nft_table *table)
8789{
8790 struct nft_audit_data *adp;
8791
8792 list_for_each_entry(adp, adl, list) {
8793 if (adp->table == table)
8794 return 0;
8795 }
8796 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
8797 if (!adp)
8798 return -ENOMEM;
8799 adp->table = table;
8800 list_add(&adp->list, adl);
8801 return 0;
8802}
8803
cfbe3650
DM		 8804static void nf_tables_commit_audit_free(struct list_head *adl)
8805{
8806 struct nft_audit_data *adp, *adn;
8807
8808 list_for_each_entry_safe(adp, adn, adl, list) {
8809 list_del(&adp->list);
8810 kfree(adp);
8811 }
8812}
8813
c520292f
RGB		 8814static void nf_tables_commit_audit_collect(struct list_head *adl,
8815 struct nft_table *table, u32 op)
8816{
8817 struct nft_audit_data *adp;
8818
8819 list_for_each_entry(adp, adl, list) {
8820 if (adp->table == table)
8821 goto found;
8822 }
dadf33c9 8823 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 8824 return;
8825found:
8826 adp->entries++;
8827 if (!adp->op || adp->op > op)
8828 adp->op = op;
8829}
8830
8831#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
8832
8833static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
8834{
8835 struct nft_audit_data *adp, *adn;
8836 char aubuf[AUNFTABLENAMELEN];
8837
8838 list_for_each_entry_safe(adp, adn, adl, list) {
8839 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
8840 generation);
8841 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
8842 nft2audit_op[adp->op], GFP_KERNEL);
8843 list_del(&adp->list);
8844 kfree(adp);
8845 }
8846}
8847
5913beaf 8848static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 8849{
d59d2f82 8850 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 8851 struct nft_trans *trans, *next;
a3716e70 8852 struct nft_trans_elem *te;
0cbc06b3
FW		 8853 struct nft_chain *chain;
8854 struct nft_table *table;
34002783 8855 unsigned int base_seq;
c520292f 8856 LIST_HEAD(adl);
c9626a2c 8857 int err;
37082f93 8858
0854db2a
FW		 8859 if (list_empty(&nft_net->commit_list)) {
8860 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 8861 return 0;
8862 }
8863
a654de8f
PNA		 8864 /* 0. Validate ruleset, otherwise roll back for error reporting. */
8865 if (nf_tables_validate(net) < 0)
8866 return -EAGAIN;
8867
c9626a2c
PNA		 8868 err = nft_flow_rule_offload_commit(net);
8869 if (err < 0)
8870 return err;
8871
0cbc06b3 8872 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 8873 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 8874 int ret;
37082f93 8875
c520292f
RGB		 8876 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
8877 if (ret) {
8878 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 8879 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 8880 return ret;
8881 }
0cbc06b3
FW		 8882 if (trans->msg_type == NFT_MSG_NEWRULE ||
8883 trans->msg_type == NFT_MSG_DELRULE) {
8884 chain = trans->ctx.chain;
8885
8886 ret = nf_tables_commit_chain_prepare(net, chain);
8887 if (ret < 0) {
8888 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 8889 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 8890 return ret;
8891 }
8892 }
8893 }
37082f93 8894
0cbc06b3 8895 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 8896 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 8897 list_for_each_entry(chain, &table->chains, list)
8898 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 8899 }
8900
8901 /*
8902 * Bump generation counter, invalidate any dump in progress.
8903 * Cannot fail after this point.
37082f93 8904 */
34002783
PNA		 8905 base_seq = READ_ONCE(nft_net->base_seq);
8906 while (++base_seq == 0)
0854db2a 8907 ;
0cbc06b3 8908
34002783
PNA		 8909 WRITE_ONCE(nft_net->base_seq, base_seq);
8910
0cbc06b3
FW		 8911 /* step 3. Start new generation, rules_gen_X now in use. */
8912 net->nft.gencursor = nft_gencursor_next(net);
37082f93 8913
0854db2a 8914 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 8915 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
8916 trans->msg_type);
b380e5c7 8917 switch (trans->msg_type) {
55dd6f93
PNA		 8918 case NFT_MSG_NEWTABLE:
8919 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 8920 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
8921 nft_trans_destroy(trans);
8922 break;
8923 }
8924 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 8925 nf_tables_table_disable(net, trans->ctx.table);
8926
179d9ba5 8927 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 8928 } else {
f2a6d766 8929 nft_clear(net, trans->ctx.table);
55dd6f93 8930 }
35151d84 8931 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 8932 nft_trans_destroy(trans);
8933 break;
8934 case NFT_MSG_DELTABLE:
f2a6d766 8935 list_del_rcu(&trans->ctx.table->list);
35151d84 8936 nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE);
55dd6f93 8937 break;
91c7b38d 8938 case NFT_MSG_NEWCHAIN:
9f8aac0b 8939 if (nft_trans_chain_update(trans)) {
91c7b38d 8940 nft_chain_commit_update(trans);
9f8aac0b
FW		 8941 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8942 /* trans destroyed after rcu grace period */
8943 } else {
66293c46 8944 nft_chain_commit_drop_policy(trans);
664b0f8c 8945 nft_clear(net, trans->ctx.chain);
9f8aac0b
FW		 8946 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8947 nft_trans_destroy(trans);
8948 }
91c7b38d
PNA		 8949 break;
8950 case NFT_MSG_DELCHAIN:
1b2470e5 8951 nft_chain_del(trans->ctx.chain);
35151d84 8952 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN);
c974a3a3
PNA		 8953 nf_tables_unregister_hook(trans->ctx.net,
8954 trans->ctx.table,
8955 trans->ctx.chain);
91c7b38d 8956 break;
b380e5c7 8957 case NFT_MSG_NEWRULE:
889f7ee7 8958 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 8959 nf_tables_rule_notify(&trans->ctx,
37082f93 8960 nft_trans_rule(trans),
35151d84 8961 NFT_MSG_NEWRULE);
9dd732e0
PNA		 8962 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
8963 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
8964
37082f93 8965 nft_trans_destroy(trans);
b380e5c7
PNA		 8966 break;
8967 case NFT_MSG_DELRULE:
8968 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 8969 nf_tables_rule_notify(&trans->ctx,
8970 nft_trans_rule(trans),
8971 NFT_MSG_DELRULE);
f6ac8585
PNA		 8972 nft_rule_expr_deactivate(&trans->ctx,
8973 nft_trans_rule(trans),
8974 NFT_TRANS_COMMIT);
b380e5c7 8975 break;
958bee14 8976 case NFT_MSG_NEWSET:
37a9cc52 8977 nft_clear(net, nft_trans_set(trans));
4fefee57
PNA		 8978 /* This avoids hitting -EBUSY when deleting the table
8979 * from the transaction.
8980 */
408070d6 8981 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
4fefee57
PNA		 8982 !list_empty(&nft_trans_set(trans)->bindings))
8983 trans->ctx.table->use--;
8984
958bee14 8985 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 8986 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 8987 nft_trans_destroy(trans);
8988 break;
8989 case NFT_MSG_DELSET:
37a9cc52 8990 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 8991 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 8992 NFT_MSG_DELSET, GFP_KERNEL);
958bee14 8993 break;
60319eb1 8994 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 8995 te = (struct nft_trans_elem *)trans->data;
8996
aaa31047 8997 nft_setelem_activate(net, te->set, &te->elem);
cc02e457
PM		 8998 nf_tables_setelem_notify(&trans->ctx, te->set,
8999 &te->elem,
6fb721cf 9000 NFT_MSG_NEWSETELEM);
60319eb1
PNA		 9001 nft_trans_destroy(trans);
9002 break;
9003 case NFT_MSG_DELSETELEM:
a3716e70 9004 te = (struct nft_trans_elem *)trans->data;
fe2811eb 9005
a3716e70
PNA		 9006 nf_tables_setelem_notify(&trans->ctx, te->set,
9007 &te->elem,
6fb721cf 9008 NFT_MSG_DELSETELEM);
aaa31047
PNA		 9009 nft_setelem_remove(net, te->set, &te->elem);
9010 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9011 atomic_dec(&te->set->nelems);
9012 te->set->ndeact--;
9013 }
60319eb1 9014 break;
e5009240 9015 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 9016 if (nft_trans_obj_update(trans)) {
9017 nft_obj_commit_update(trans);
9018 nf_tables_obj_notify(&trans->ctx,
9019 nft_trans_obj(trans),
9020 NFT_MSG_NEWOBJ);
9021 } else {
9022 nft_clear(net, nft_trans_obj(trans));
9023 nf_tables_obj_notify(&trans->ctx,
9024 nft_trans_obj(trans),
9025 NFT_MSG_NEWOBJ);
9026 nft_trans_destroy(trans);
9027 }
e5009240
PNA		 9028 break;
9029 case NFT_MSG_DELOBJ:
d152159b 9030 nft_obj_del(nft_trans_obj(trans));
e5009240
PNA		 9031 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
9032 NFT_MSG_DELOBJ);
9033 break;
3b49e2e9 9034 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9035 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 9036 nft_trans_flowtable(trans)->data.flags =
9037 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 9038 nf_tables_flowtable_notify(&trans->ctx,
9039 nft_trans_flowtable(trans),
9040 &nft_trans_flowtable_hooks(trans),
9041 NFT_MSG_NEWFLOWTABLE);
9042 list_splice(&nft_trans_flowtable_hooks(trans),
9043 &nft_trans_flowtable(trans)->hook_list);
9044 } else {
9045 nft_clear(net, nft_trans_flowtable(trans));
9046 nf_tables_flowtable_notify(&trans->ctx,
9047 nft_trans_flowtable(trans),
9048 &nft_trans_flowtable(trans)->hook_list,
9049 NFT_MSG_NEWFLOWTABLE);
9050 }
3b49e2e9
PNA		 9051 nft_trans_destroy(trans);
9052 break;
9053 case NFT_MSG_DELFLOWTABLE:
abadb2f8 9054 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 9055 nf_tables_flowtable_notify(&trans->ctx,
9056 nft_trans_flowtable(trans),
9057 &nft_trans_flowtable_hooks(trans),
9058 NFT_MSG_DELFLOWTABLE);
9059 nft_unregister_flowtable_net_hooks(net,
9060 &nft_trans_flowtable_hooks(trans));
9061 } else {
9062 list_del_rcu(&nft_trans_flowtable(trans)->list);
9063 nf_tables_flowtable_notify(&trans->ctx,
9064 nft_trans_flowtable(trans),
9065 &nft_trans_flowtable(trans)->hook_list,
9066 NFT_MSG_DELFLOWTABLE);
9067 nft_unregister_flowtable_net_hooks(net,
9068 &nft_trans_flowtable(trans)->hook_list);
9069 }
3b49e2e9 9070 break;
37082f93 9071 }
37082f93
PNA		 9072 }
9073
67cc570e 9074 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 9075 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 9076 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
0935d558 9077 nf_tables_commit_release(net);
37082f93
PNA		 9078
9079 return 0;
9080}
9081
eb014de4
PNA		 9082static void nf_tables_module_autoload(struct net *net)
9083{
d59d2f82 9084 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9085 struct nft_module_request *req, *next;
9086 LIST_HEAD(module_list);
9087
0854db2a
FW		 9088 list_splice_init(&nft_net->module_list, &module_list);
9089 mutex_unlock(&nft_net->commit_mutex);
eb014de4 9090 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 9091 request_module("%s", req->module);
9092 req->done = true;
eb014de4 9093 }
0854db2a
FW		 9094 mutex_lock(&nft_net->commit_mutex);
9095 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 9096}
9097
b326dd37 9098static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 9099{
c7c32e72
PNA		 9100 switch (trans->msg_type) {
9101 case NFT_MSG_NEWTABLE:
9102 nf_tables_table_destroy(&trans->ctx);
9103 break;
9104 case NFT_MSG_NEWCHAIN:
43a605f2 9105 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9106 break;
9107 case NFT_MSG_NEWRULE:
9108 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9109 break;
9110 case NFT_MSG_NEWSET:
0c2a85ed 9111 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9112 break;
61edafbb
PM		 9113 case NFT_MSG_NEWSETELEM:
9114 nft_set_elem_destroy(nft_trans_elem_set(trans),
61f9e292 9115 nft_trans_elem(trans).priv, true);
61edafbb 9116 break;
e5009240 9117 case NFT_MSG_NEWOBJ:
00bfb320 9118 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9119 break;
3b49e2e9 9120 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9121 if (nft_trans_flowtable_update(trans))
9122 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
9123 else
9124 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9125 break;
c7c32e72
PNA		 9126 }
9127 kfree(trans);
9128}
9129
c0391b6a 9130static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 9131{
d59d2f82 9132 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9133 struct nft_trans *trans, *next;
02263db0 9134 struct nft_trans_elem *te;
37082f93 9135
c0391b6a
PNA		 9136 if (action == NFNL_ABORT_VALIDATE &&
9137 nf_tables_validate(net) < 0)
9138 return -EAGAIN;
9139
0854db2a 9140 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 9141 list) {
b380e5c7 9142 switch (trans->msg_type) {
55dd6f93
PNA		 9143 case NFT_MSG_NEWTABLE:
9144 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9145 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9146 nft_trans_destroy(trans);
9147 break;
9148 }
9149 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 9150 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 9151 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
9152 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
9153 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
9154 }
9155 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 9156 nft_trans_destroy(trans);
9157 } else {
e688a7f8 9158 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 9159 }
9160 break;
9161 case NFT_MSG_DELTABLE:
f2a6d766 9162 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 9163 nft_trans_destroy(trans);
9164 break;
91c7b38d
PNA		 9165 case NFT_MSG_NEWCHAIN:
9166 if (nft_trans_chain_update(trans)) {
982f4051 9167 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 9168 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 9169 nft_trans_destroy(trans);
9170 } else {
d0e2c7de
PNA		 9171 if (nft_chain_is_bound(trans->ctx.chain)) {
9172 nft_trans_destroy(trans);
9173 break;
9174 }
4fefee57 9175 trans->ctx.table->use--;
1b2470e5 9176 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 9177 nf_tables_unregister_hook(trans->ctx.net,
9178 trans->ctx.table,
9179 trans->ctx.chain);
91c7b38d
PNA		 9180 }
9181 break;
9182 case NFT_MSG_DELCHAIN:
4fefee57 9183 trans->ctx.table->use++;
664b0f8c 9184 nft_clear(trans->ctx.net, trans->ctx.chain);
91c7b38d
PNA		 9185 nft_trans_destroy(trans);
9186 break;
b380e5c7 9187 case NFT_MSG_NEWRULE:
4fefee57 9188 trans->ctx.chain->use--;
b380e5c7 9189 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 9190 nft_rule_expr_deactivate(&trans->ctx,
9191 nft_trans_rule(trans),
9192 NFT_TRANS_ABORT);
3c5e4462
PNA		 9193 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9194 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 9195 break;
9196 case NFT_MSG_DELRULE:
4fefee57 9197 trans->ctx.chain->use++;
889f7ee7 9198 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 9199 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 9200 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9201 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9202
37082f93 9203 nft_trans_destroy(trans);
b380e5c7 9204 break;
958bee14 9205 case NFT_MSG_NEWSET:
4fefee57 9206 trans->ctx.table->use--;
6a0a8d10 9207 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 9208 nft_trans_destroy(trans);
9209 break;
9210 }
9211 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 9212 break;
9213 case NFT_MSG_DELSET:
4fefee57 9214 trans->ctx.table->use++;
37a9cc52 9215 nft_clear(trans->ctx.net, nft_trans_set(trans));
958bee14
PNA		 9216 nft_trans_destroy(trans);
9217 break;
60319eb1 9218 case NFT_MSG_NEWSETELEM:
6a0a8d10 9219 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 9220 nft_trans_destroy(trans);
9221 break;
9222 }
02263db0 9223 te = (struct nft_trans_elem *)trans->data;
aaa31047
PNA		 9224 nft_setelem_remove(net, te->set, &te->elem);
9225 if (!nft_setelem_is_catchall(te->set, &te->elem))
9226 atomic_dec(&te->set->nelems);
60319eb1
PNA		 9227 break;
9228 case NFT_MSG_DELSETELEM:
cc02e457
PM		 9229 te = (struct nft_trans_elem *)trans->data;
9230
f8bb7889 9231 nft_setelem_data_activate(net, te->set, &te->elem);
aaa31047
PNA		 9232 nft_setelem_activate(net, te->set, &te->elem);
9233 if (!nft_setelem_is_catchall(te->set, &te->elem))
9234 te->set->ndeact--;
cc02e457 9235
e5009240
PNA		 9236 nft_trans_destroy(trans);
9237 break;
9238 case NFT_MSG_NEWOBJ:
d62d0ba9 9239 if (nft_trans_obj_update(trans)) {
dad3bdee 9240 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 9241 nft_trans_destroy(trans);
9242 } else {
9243 trans->ctx.table->use--;
9244 nft_obj_del(nft_trans_obj(trans));
9245 }
e5009240
PNA		 9246 break;
9247 case NFT_MSG_DELOBJ:
9248 trans->ctx.table->use++;
9249 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 9250 nft_trans_destroy(trans);
9251 break;
3b49e2e9 9252 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9253 if (nft_trans_flowtable_update(trans)) {
9254 nft_unregister_flowtable_net_hooks(net,
9255 &nft_trans_flowtable_hooks(trans));
9256 } else {
9257 trans->ctx.table->use--;
9258 list_del_rcu(&nft_trans_flowtable(trans)->list);
9259 nft_unregister_flowtable_net_hooks(net,
9260 &nft_trans_flowtable(trans)->hook_list);
9261 }
3b49e2e9
PNA		 9262 break;
9263 case NFT_MSG_DELFLOWTABLE:
abadb2f8 9264 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 9265 list_splice(&nft_trans_flowtable_hooks(trans),
9266 &nft_trans_flowtable(trans)->hook_list);
abadb2f8
PNA		 9267 } else {
9268 trans->ctx.table->use++;
9269 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9270 }
3b49e2e9
PNA		 9271 nft_trans_destroy(trans);
9272 break;
37082f93 9273 }
37082f93
PNA		 9274 }
9275
b326dd37
PNA		 9276 synchronize_rcu();
9277
a1cee076 9278 list_for_each_entry_safe_reverse(trans, next,
0854db2a 9279 &nft_net->commit_list, list) {
c7c32e72 9280 list_del(&trans->list);
b326dd37 9281 nf_tables_abort_release(trans);
37082f93
PNA		 9282 }
9283
c0391b6a 9284 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 9285 nf_tables_module_autoload(net);
9286 else
9287 nf_tables_module_autoload_cleanup(net);
9288
37082f93
PNA		 9289 return 0;
9290}
9291
a654de8f
PNA		 9292static void nf_tables_cleanup(struct net *net)
9293{
9294 nft_validate_state_update(net, NFT_VALIDATE_SKIP);
9295}
9296
c0391b6a
PNA		 9297static int nf_tables_abort(struct net *net, struct sk_buff *skb,
9298 enum nfnl_abort_action action)
71ad00c5 9299{
d59d2f82 9300 struct nftables_pernet *nft_net = nft_pernet(net);
c0391b6a 9301 int ret = __nf_tables_abort(net, action);
f102d66b 9302
0854db2a 9303 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9304
9305 return ret;
71ad00c5
FW		 9306}
9307
74e8bcd2
PNA		 9308static bool nf_tables_valid_genid(struct net *net, u32 genid)
9309{
d59d2f82 9310 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 9311 bool genid_ok;
9312
0854db2a 9313 mutex_lock(&nft_net->commit_mutex);
f102d66b 9314
0854db2a 9315 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 9316 if (!genid_ok)
0854db2a 9317 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9318
9319 /* else, commit mutex has to be released by commit or abort function */
9320 return genid_ok;
74e8bcd2
PNA		 9321}
9322
96518518
PM		 9323static const struct nfnetlink_subsystem nf_tables_subsys = {
9324 .name = "nf_tables",
9325 .subsys_id = NFNL_SUBSYS_NFTABLES,
9326 .cb_count = NFT_MSG_MAX,
9327 .cb = nf_tables_cb,
0628b123
PNA		 9328 .commit = nf_tables_commit,
9329 .abort = nf_tables_abort,
a654de8f 9330 .cleanup = nf_tables_cleanup,
74e8bcd2 9331 .valid_genid = nf_tables_valid_genid,
be2ab5b4 9332 .owner = THIS_MODULE,
96518518
PM		 9333};
9334
7210e4e3 9335int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 9336 enum nft_chain_types type)
7210e4e3
PNA		 9337{
9338 const struct nft_base_chain *basechain;
9339
f323d954 9340 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 9341 basechain = nft_base_chain(chain);
9342 if (basechain->type->type != type)
9343 return -EOPNOTSUPP;
9344 }
9345 return 0;
9346}
9347EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
9348
75e8d06d
PNA		 9349int nft_chain_validate_hooks(const struct nft_chain *chain,
9350 unsigned int hook_flags)
9351{
9352 struct nft_base_chain *basechain;
9353
f323d954 9354 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 9355 basechain = nft_base_chain(chain);
9356
c974a3a3 9357 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 9358 return 0;
9359
9360 return -EOPNOTSUPP;
9361 }
9362
9363 return 0;
9364}
9365EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
9366
20a69341
PM		 9367/*
9368 * Loop detection - walk through the ruleset beginning at the destination chain
9369 * of a new jump until either the source chain is reached (loop) or all
9370 * reachable chains have been traversed.
9371 *
9372 * The loop check is performed whenever a new jump verdict is added to an
9373 * expression or verdict map or a verdict map is bound to a new chain.
9374 */
9375
9376static int nf_tables_check_loops(const struct nft_ctx *ctx,
9377 const struct nft_chain *chain);
9378
6387aa6e
PNA		 9379static int nft_check_loops(const struct nft_ctx *ctx,
9380 const struct nft_set_ext *ext)
9381{
9382 const struct nft_data *data;
9383 int ret;
9384
9385 data = nft_set_ext_data(ext);
9386 switch (data->verdict.code) {
9387 case NFT_JUMP:
9388 case NFT_GOTO:
9389 ret = nf_tables_check_loops(ctx, data->verdict.chain);
9390 break;
9391 default:
9392 ret = 0;
9393 break;
9394 }
9395
9396 return ret;
9397}
9398
20a69341 9399static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 9400 struct nft_set *set,
20a69341 9401 const struct nft_set_iter *iter,
de70185d 9402 struct nft_set_elem *elem)
20a69341 9403{
fe2811eb 9404 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
fe2811eb
PM		 9405
9406 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
9407 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 9408 return 0;
9409
6387aa6e 9410 return nft_check_loops(ctx, ext);
20a69341
PM		 9411}
9412
aaa31047
PNA		 9413static int nft_set_catchall_loops(const struct nft_ctx *ctx,
9414 struct nft_set *set)
9415{
9416 u8 genmask = nft_genmask_next(ctx->net);
9417 struct nft_set_elem_catchall *catchall;
9418 struct nft_set_ext *ext;
9419 int ret = 0;
9420
9421 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9422 ext = nft_set_elem_ext(set, catchall->elem);
9423 if (!nft_set_elem_active(ext, genmask))
9424 continue;
9425
9426 ret = nft_check_loops(ctx, ext);
9427 if (ret < 0)
9428 return ret;
9429 }
9430
9431 return ret;
9432}
9433
20a69341
PM		 9434static int nf_tables_check_loops(const struct nft_ctx *ctx,
9435 const struct nft_chain *chain)
9436{
9437 const struct nft_rule *rule;
9438 const struct nft_expr *expr, *last;
de70185d 9439 struct nft_set *set;
20a69341
PM		 9440 struct nft_set_binding *binding;
9441 struct nft_set_iter iter;
20a69341
PM		 9442
9443 if (ctx->chain == chain)
9444 return -ELOOP;
9445
9446 list_for_each_entry(rule, &chain->rules, list) {
9447 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 9448 struct nft_immediate_expr *priv;
9449 const struct nft_data *data;
0ca743a5
PNA		 9450 int err;
9451
a654de8f 9452 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 9453 continue;
9454
a654de8f
PNA		 9455 priv = nft_expr_priv(expr);
9456 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 9457 continue;
20a69341 9458
a654de8f 9459 data = &priv->data;
1ca2e170 9460 switch (data->verdict.code) {
20a69341
PM		 9461 case NFT_JUMP:
9462 case NFT_GOTO:
1ca2e170
PM		 9463 err = nf_tables_check_loops(ctx,
9464 data->verdict.chain);
20a69341
PM		 9465 if (err < 0)
9466 return err;
c2168e6b 9467 break;
20a69341
PM		 9468 default:
9469 break;
9470 }
9471 }
9472 }
9473
9474 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 9475 if (!nft_is_active_next(ctx->net, set))
9476 continue;
20a69341
PM		 9477 if (!(set->flags & NFT_SET_MAP) ||
9478 set->dtype != NFT_DATA_VERDICT)
9479 continue;
9480
9481 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 9482 if (!(binding->flags & NFT_SET_MAP) ||
9483 binding->chain != chain)
20a69341
PM		 9484 continue;
9485
8588ac09 9486 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 9487 iter.skip = 0;
9488 iter.count = 0;
9489 iter.err = 0;
9490 iter.fn = nf_tables_loop_check_setelem;
9491
9492 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 9493 if (!iter.err)
9494 iter.err = nft_set_catchall_loops(ctx, set);
9495
20a69341
PM		 9496 if (iter.err < 0)
9497 return iter.err;
9498 }
9499 }
9500
9501 return 0;
9502}
9503
36b701fa
LGL		 9504/**
9505 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
9506 *
9507 * @attr: netlink attribute to fetch value from
9508 * @max: maximum value to be stored in dest
9509 * @dest: pointer to the variable
9510 *
9511 * Parse, check and store a given u32 netlink attribute into variable.
9512 * This function returns -ERANGE if the value goes over maximum value.
9513 * Otherwise a 0 is returned and the attribute value is stored in the
9514 * destination variable.
9515 */
f1d505bb 9516int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 9517{
09525a09 9518 u32 val;
36b701fa
LGL		 9519
9520 val = ntohl(nla_get_be32(attr));
9521 if (val > max)
9522 return -ERANGE;
9523
9524 *dest = val;
9525 return 0;
9526}
9527EXPORT_SYMBOL_GPL(nft_parse_u32_check);
9528
6c6f9f31 9529static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 9530{
49499c3e
PM		 9531 unsigned int reg;
9532
9533 reg = ntohl(nla_get_be32(attr));
9534 switch (reg) {
9535 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 9536 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
9537 break;
9538 case NFT_REG32_00...NFT_REG32_15:
9539 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
9540 break;
49499c3e 9541 default:
6e1acfa3 9542 return -ERANGE;
49499c3e 9543 }
6e1acfa3
PNA		 9544
9545 return 0;
b1c96ed3 9546}
b1c96ed3 9547
49499c3e
PM		 9548/**
9549 * nft_dump_register - dump a register value to a netlink attribute
9550 *
9551 * @skb: socket buffer
9552 * @attr: attribute number
9553 * @reg: register number
9554 *
9555 * Construct a netlink attribute containing the register number. For
9556 * compatibility reasons, register numbers being a multiple of 4 are
9557 * translated to the corresponding 128 bit register numbers.
9558 */
b1c96ed3
PM		 9559int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
9560{
49499c3e
PM		 9561 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
9562 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
9563 else
9564 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
9565
b1c96ed3
PM		 9566 return nla_put_be32(skb, attr, htonl(reg));
9567}
9568EXPORT_SYMBOL_GPL(nft_dump_register);
9569
4f16d25c 9570static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 9571{
49499c3e 9572 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 9573 return -EINVAL;
d07db988
PM		 9574 if (len == 0)
9575 return -EINVAL;
c593642c 9576 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 9577 return -ERANGE;
49499c3e 9578
96518518
PM		 9579 return 0;
9580}
4f16d25c
PNA		 9581
9582int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
9583{
9584 u32 reg;
9585 int err;
9586
6e1acfa3
PNA		 9587 err = nft_parse_register(attr, &reg);
9588 if (err < 0)
9589 return err;
9590
4f16d25c
PNA		 9591 err = nft_validate_register_load(reg, len);
9592 if (err < 0)
9593 return err;
9594
9595 *sreg = reg;
9596 return 0;
9597}
9598EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 9599
345023b0
PNA		 9600static int nft_validate_register_store(const struct nft_ctx *ctx,
9601 enum nft_registers reg,
9602 const struct nft_data *data,
9603 enum nft_data_types type,
9604 unsigned int len)
96518518 9605{
20a69341
PM		 9606 int err;
9607
96518518
PM		 9608 switch (reg) {
9609 case NFT_REG_VERDICT:
58f40ab6 9610 if (type != NFT_DATA_VERDICT)
96518518 9611 return -EINVAL;
20a69341 9612
58f40ab6 9613 if (data != NULL &&
1ca2e170
PM		 9614 (data->verdict.code == NFT_GOTO ||
9615 data->verdict.code == NFT_JUMP)) {
9616 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 9617 if (err < 0)
9618 return err;
20a69341
PM		 9619 }
9620
96518518
PM		 9621 return 0;
9622 default:
49499c3e 9623 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 9624 return -EINVAL;
45d9bcda
PM		 9625 if (len == 0)
9626 return -EINVAL;
49499c3e 9627 if (reg * NFT_REG32_SIZE + len >
c593642c 9628 sizeof_field(struct nft_regs, data))
45d9bcda 9629 return -ERANGE;
27e6d201 9630
96518518
PM		 9631 if (data != NULL && type != NFT_DATA_VALUE)
9632 return -EINVAL;
9633 return 0;
9634 }
9635}
345023b0
PNA		 9636
9637int nft_parse_register_store(const struct nft_ctx *ctx,
9638 const struct nlattr *attr, u8 *dreg,
9639 const struct nft_data *data,
9640 enum nft_data_types type, unsigned int len)
9641{
9642 int err;
9643 u32 reg;
9644
6e1acfa3
PNA		 9645 err = nft_parse_register(attr, &reg);
9646 if (err < 0)
9647 return err;
9648
345023b0
PNA		 9649 err = nft_validate_register_store(ctx, reg, data, type, len);
9650 if (err < 0)
9651 return err;
9652
9653 *dreg = reg;
9654 return 0;
9655}
9656EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 9657
9658static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
9659 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
9660 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
9661 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 9662 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 9663};
9664
9665static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
9666 struct nft_data_desc *desc, const struct nlattr *nla)
9667{
664b0f8c 9668 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 9669 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
9670 struct nft_chain *chain;
9671 int err;
9672
8cb08174
JB		 9673 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
9674 nft_verdict_policy, NULL);
96518518
PM		 9675 if (err < 0)
9676 return err;
9677
9678 if (!tb[NFTA_VERDICT_CODE])
9679 return -EINVAL;
1ca2e170 9680 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 9681
1ca2e170 9682 switch (data->verdict.code) {
e0abdadc 9683 default:
1ca2e170 9684 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 9685 case NF_ACCEPT:
9686 case NF_DROP:
9687 case NF_QUEUE:
9688 break;
9689 default:
9690 return -EINVAL;
9691 }
954d8297 9692 fallthrough;
96518518
PM		 9693 case NFT_CONTINUE:
9694 case NFT_BREAK:
9695 case NFT_RETURN:
96518518
PM		 9696 break;
9697 case NFT_JUMP:
9698 case NFT_GOTO:
51d70f18
PNA		 9699 if (tb[NFTA_VERDICT_CHAIN]) {
9700 chain = nft_chain_lookup(ctx->net, ctx->table,
9701 tb[NFTA_VERDICT_CHAIN],
9702 genmask);
9703 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 9704 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
51d70f18
PNA		 9705 tb[NFTA_VERDICT_CHAIN_ID]);
9706 if (IS_ERR(chain))
9707 return PTR_ERR(chain);
9708 } else {
96518518 9709 return -EINVAL;
51d70f18
PNA		 9710 }
9711
96518518
PM		 9712 if (IS_ERR(chain))
9713 return PTR_ERR(chain);
f323d954 9714 if (nft_is_base_chain(chain))
96518518 9715 return -EOPNOTSUPP;
e02f0d39
PNA		 9716 if (nft_chain_is_bound(chain))
9717 return -EINVAL;
f323ef3a
PNA		 9718 if (desc->flags & NFT_DATA_DESC_SETELEM &&
9719 chain->flags & NFT_CHAIN_BINDING)
9720 return -EINVAL;
96518518 9721
96518518 9722 chain->use++;
1ca2e170 9723 data->verdict.chain = chain;
96518518 9724 break;
96518518
PM		 9725 }
9726
4c4ed074 9727 desc->len = sizeof(data->verdict);
341b6941 9728
96518518
PM		 9729 return 0;
9730}
9731
9732static void nft_verdict_uninit(const struct nft_data *data)
9733{
d0e2c7de
PNA		 9734 struct nft_chain *chain;
9735 struct nft_rule *rule;
9736
1ca2e170 9737 switch (data->verdict.code) {
96518518
PM		 9738 case NFT_JUMP:
9739 case NFT_GOTO:
d0e2c7de
PNA		 9740 chain = data->verdict.chain;
9741 chain->use--;
9742
9743 if (!nft_chain_is_bound(chain))
9744 break;
9745
9746 chain->table->use--;
9747 list_for_each_entry(rule, &chain->rules, list)
9748 chain->use--;
9749
9750 nft_chain_del(chain);
96518518
PM		 9751 break;
9752 }
9753}
9754
33d5a7b1 9755int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 9756{
9757 struct nlattr *nest;
9758
ae0be8de 9759 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 9760 if (!nest)
9761 goto nla_put_failure;
9762
33d5a7b1 9763 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 9764 goto nla_put_failure;
9765
33d5a7b1 9766 switch (v->code) {
96518518
PM		 9767 case NFT_JUMP:
9768 case NFT_GOTO:
1ca2e170 9769 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 9770 v->chain->name))
96518518
PM		 9771 goto nla_put_failure;
9772 }
9773 nla_nest_end(skb, nest);
9774 return 0;
9775
9776nla_put_failure:
9777 return -1;
9778}
9779
d0a11fc3 9780static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 9781 struct nft_data *data, struct nft_data_desc *desc,
9782 const struct nlattr *nla)
96518518
PM		 9783{
9784 unsigned int len;
9785
9786 len = nla_len(nla);
9787 if (len == 0)
9788 return -EINVAL;
341b6941 9789 if (len > desc->size)
96518518 9790 return -EOVERFLOW;
341b6941
PNA		 9791 if (desc->len) {
9792 if (len != desc->len)
9793 return -EINVAL;
9794 } else {
9795 desc->len = len;
9796 }
96518518 9797
d0a11fc3 9798 nla_memcpy(data->data, nla, len);
341b6941 9799
96518518
PM		 9800 return 0;
9801}
9802
9803static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
9804 unsigned int len)
9805{
9806 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
9807}
9808
9809static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 9810 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 9811 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
9812};
9813
9814/**
9815 * nft_data_init - parse nf_tables data netlink attributes
9816 *
9817 * @ctx: context of the expression using the data
9818 * @data: destination struct nft_data
9819 * @desc: data description
9820 * @nla: netlink attribute containing data
9821 *
9822 * Parse the netlink data attributes and initialize a struct nft_data.
9823 * The type and length of data are returned in the data description.
9824 *
9825 * The caller can indicate that it only wants to accept data of type
9826 * NFT_DATA_VALUE by passing NULL for the ctx argument.
9827 */
341b6941 9828int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 9829 struct nft_data_desc *desc, const struct nlattr *nla)
9830{
9831 struct nlattr *tb[NFTA_DATA_MAX + 1];
9832 int err;
9833
341b6941
PNA		 9834 if (WARN_ON_ONCE(!desc->size))
9835 return -EINVAL;
9836
8cb08174
JB		 9837 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
9838 nft_data_policy, NULL);
96518518
PM		 9839 if (err < 0)
9840 return err;
9841
341b6941
PNA		 9842 if (tb[NFTA_DATA_VALUE]) {
9843 if (desc->type != NFT_DATA_VALUE)
9844 return -EINVAL;
9845
9846 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
9847 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
9848 if (desc->type != NFT_DATA_VERDICT)
9849 return -EINVAL;
9850
9851 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
9852 } else {
9853 err = -EINVAL;
9854 }
9855
9856 return err;
96518518
PM		 9857}
9858EXPORT_SYMBOL_GPL(nft_data_init);
9859
9860/**
59105446 9861 * nft_data_release - release a nft_data item
96518518
PM		 9862 *
9863 * @data: struct nft_data to release
9864 * @type: type of data
9865 *
9866 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
9867 * all others need to be released by calling this function.
9868 */
59105446 9869void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 9870{
960bd2c2 9871 if (type < NFT_DATA_VERDICT)
96518518 9872 return;
960bd2c2 9873 switch (type) {
96518518
PM		 9874 case NFT_DATA_VERDICT:
9875 return nft_verdict_uninit(data);
9876 default:
9877 WARN_ON(1);
9878 }
9879}
59105446 9880EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 9881
9882int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
9883 enum nft_data_types type, unsigned int len)
9884{
9885 struct nlattr *nest;
9886 int err;
9887
ae0be8de 9888 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 9889 if (nest == NULL)
9890 return -1;
9891
9892 switch (type) {
9893 case NFT_DATA_VALUE:
9894 err = nft_value_dump(skb, data, len);
9895 break;
9896 case NFT_DATA_VERDICT:
33d5a7b1 9897 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 9898 break;
9899 default:
9900 err = -EINVAL;
9901 WARN_ON(1);
9902 }
9903
9904 nla_nest_end(skb, nest);
9905 return err;
9906}
9907EXPORT_SYMBOL_GPL(nft_data_dump);
9908
5ebe0b0e
PNA		 9909int __nft_release_basechain(struct nft_ctx *ctx)
9910{
9911 struct nft_rule *rule, *nr;
9912
fa5950e4
FW		 9913 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
9914 return 0;
5ebe0b0e 9915
c974a3a3 9916 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 9917 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
9918 list_del(&rule->list);
9919 ctx->chain->use--;
bb7b40ae 9920 nf_tables_rule_release(ctx, rule);
5ebe0b0e 9921 }
1b2470e5 9922 nft_chain_del(ctx->chain);
5ebe0b0e 9923 ctx->table->use--;
43a605f2 9924 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 9925
9926 return 0;
9927}
9928EXPORT_SYMBOL_GPL(__nft_release_basechain);
9929
00dfe9be
PNA		 9930static void __nft_release_hook(struct net *net, struct nft_table *table)
9931{
6069da44 9932 struct nft_flowtable *flowtable;
00dfe9be
PNA		 9933 struct nft_chain *chain;
9934
9935 list_for_each_entry(chain, &table->chains, list)
f9a43007 9936 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 9937 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 9938 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
9939 true);
00dfe9be
PNA		 9940}
9941
767d1216
PNA		 9942static void __nft_release_hooks(struct net *net)
9943{
d59d2f82 9944 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 9945 struct nft_table *table;
767d1216 9946
0854db2a 9947 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 9948 if (nft_table_has_owner(table))
9949 continue;
9950
00dfe9be 9951 __nft_release_hook(net, table);
2888b080 9952 }
767d1216
PNA		 9953}
9954
fd020332 9955static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 9956{
3b49e2e9 9957 struct nft_flowtable *flowtable, *nf;
df05ef87 9958 struct nft_chain *chain, *nc;
e5009240 9959 struct nft_object *obj, *ne;
df05ef87
PNA		 9960 struct nft_rule *rule, *nr;
9961 struct nft_set *set, *ns;
9962 struct nft_ctx ctx = {
9963 .net = net,
43a605f2 9964 .family = NFPROTO_NETDEV,
df05ef87
PNA		 9965 };
9966
fd020332
PNA		 9967 ctx.family = table->family;
9968 ctx.table = table;
9969 list_for_each_entry(chain, &table->chains, list) {
9970 ctx.chain = chain;
9971 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
9972 list_del(&rule->list);
9973 chain->use--;
9974 nf_tables_rule_release(&ctx, rule);
df05ef87 9975 }
df05ef87 9976 }
fd020332
PNA		 9977 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
9978 list_del(&flowtable->list);
9979 table->use--;
9980 nf_tables_flowtable_destroy(flowtable);
9981 }
9982 list_for_each_entry_safe(set, ns, &table->sets, list) {
9983 list_del(&set->list);
9984 table->use--;
9985 nft_set_destroy(&ctx, set);
9986 }
9987 list_for_each_entry_safe(obj, ne, &table->objects, list) {
9988 nft_obj_del(obj);
9989 table->use--;
9990 nft_obj_destroy(&ctx, obj);
9991 }
9992 list_for_each_entry_safe(chain, nc, &table->chains, list) {
9993 ctx.chain = chain;
9994 nft_chain_del(chain);
9995 table->use--;
9996 nf_tables_chain_destroy(&ctx);
9997 }
fd020332
PNA		 9998 nf_tables_table_destroy(&ctx);
9999}
10000
bd1777b3 10001static void __nft_release_tables(struct net *net)
fd020332 10002{
d59d2f82 10003 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 10004 struct nft_table *table, *nt;
10005
0854db2a 10006 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 10007 if (nft_table_has_owner(table))
6001a930
PNA		 10008 continue;
10009
a499b03b
FW		 10010 list_del(&table->list);
10011
fd020332 10012 __nft_release_table(net, table);
6001a930
PNA		 10013 }
10014}
10015
10016static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
10017 void *ptr)
10018{
a499b03b 10019 struct nft_table *table, *to_delete[8];
0854db2a 10020 struct nftables_pernet *nft_net;
6001a930 10021 struct netlink_notify *n = ptr;
6001a930 10022 struct net *net = n->net;
a499b03b
FW		 10023 unsigned int deleted;
10024 bool restart = false;
6001a930
PNA		 10025
10026 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
10027 return NOTIFY_DONE;
10028
d59d2f82 10029 nft_net = nft_pernet(net);
a499b03b 10030 deleted = 0;
0854db2a 10031 mutex_lock(&nft_net->commit_mutex);
a499b03b 10032again:
0854db2a 10033 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 10034 if (nft_table_has_owner(table) &&
10035 n->portid == table->nlpid) {
10036 __nft_release_hook(net, table);
a499b03b
FW		 10037 list_del_rcu(&table->list);
10038 to_delete[deleted++] = table;
10039 if (deleted >= ARRAY_SIZE(to_delete))
10040 break;
6001a930
PNA		 10041 }
10042 }
a499b03b
FW		 10043 if (deleted) {
10044 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 10045 synchronize_rcu();
a499b03b
FW		 10046 while (deleted)
10047 __nft_release_table(net, to_delete[--deleted]);
10048
10049 if (restart)
10050 goto again;
6001a930 10051 }
0854db2a 10052 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 10053
10054 return NOTIFY_DONE;
df05ef87
PNA		 10055}
10056
6001a930
PNA		 10057static struct notifier_block nft_nl_notifier = {
10058 .notifier_call = nft_rcv_nl_event,
10059};
10060
dd4cbef7
PNA		 10061static int __net_init nf_tables_init_net(struct net *net)
10062{
d59d2f82 10063 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10064
10065 INIT_LIST_HEAD(&nft_net->tables);
10066 INIT_LIST_HEAD(&nft_net->commit_list);
10067 INIT_LIST_HEAD(&nft_net->module_list);
10068 INIT_LIST_HEAD(&nft_net->notify_list);
10069 mutex_init(&nft_net->commit_mutex);
10070 nft_net->base_seq = 1;
10071 nft_net->validate_state = NFT_VALIDATE_SKIP;
a654de8f 10072
dd4cbef7
PNA		 10073 return 0;
10074}
10075
767d1216
PNA		 10076static void __net_exit nf_tables_pre_exit_net(struct net *net)
10077{
3923b1e4
PNA		 10078 struct nftables_pernet *nft_net = nft_pernet(net);
10079
10080 mutex_lock(&nft_net->commit_mutex);
767d1216 10081 __nft_release_hooks(net);
3923b1e4 10082 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 10083}
10084
dd4cbef7
PNA		 10085static void __net_exit nf_tables_exit_net(struct net *net)
10086{
d59d2f82 10087 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10088
10089 mutex_lock(&nft_net->commit_mutex);
10090 if (!list_empty(&nft_net->commit_list))
c0391b6a 10091 __nf_tables_abort(net, NFNL_ABORT_NONE);
bd1777b3 10092 __nft_release_tables(net);
0854db2a
FW		 10093 mutex_unlock(&nft_net->commit_mutex);
10094 WARN_ON_ONCE(!list_empty(&nft_net->tables));
10095 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
10096 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 10097}
10098
99633ab2 10099static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 10100 .init = nf_tables_init_net,
10101 .pre_exit = nf_tables_pre_exit_net,
10102 .exit = nf_tables_exit_net,
0854db2a
FW		 10103 .id = &nf_tables_net_id,
10104 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 10105};
10106
96518518
PM		 10107static int __init nf_tables_module_init(void)
10108{
10109 int err;
10110
d209df3e
FW		 10111 err = register_pernet_subsys(&nf_tables_net_ops);
10112 if (err < 0)
10113 return err;
10114
10115 err = nft_chain_filter_init();
10116 if (err < 0)
6001a930 10117 goto err_chain_filter;
02c7b25e 10118
96518518
PM		 10119 err = nf_tables_core_module_init();
10120 if (err < 0)
6001a930 10121 goto err_core_module;
96518518 10122
d209df3e 10123 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 10124 if (err < 0)
6001a930 10125 goto err_netdev_notifier;
96518518 10126
4d44175a
FW		 10127 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
10128 if (err < 0)
6001a930 10129 goto err_rht_objname;
4d44175a 10130
06d392cb 10131 err = nft_offload_init();
10132 if (err < 0)
6001a930
PNA		 10133 goto err_offload;
10134
10135 err = netlink_register_notifier(&nft_nl_notifier);
10136 if (err < 0)
10137 goto err_netlink_notifier;
06d392cb 10138
d209df3e
FW		 10139 /* must be last */
10140 err = nfnetlink_subsys_register(&nf_tables_subsys);
10141 if (err < 0)
6001a930 10142 goto err_nfnl_subsys;
3b49e2e9 10143
c1deb065 10144 nft_chain_route_init();
3474a2c6 10145
d209df3e 10146 return err;
6001a930
PNA		 10147
10148err_nfnl_subsys:
10149 netlink_unregister_notifier(&nft_nl_notifier);
10150err_netlink_notifier:
06d392cb 10151 nft_offload_exit();
6001a930 10152err_offload:
4d44175a 10153 rhltable_destroy(&nft_objname_ht);
6001a930 10154err_rht_objname:
d209df3e 10155 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 10156err_netdev_notifier:
96518518 10157 nf_tables_core_module_exit();
6001a930 10158err_core_module:
d209df3e 10159 nft_chain_filter_fini();
6001a930 10160err_chain_filter:
d209df3e 10161 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 10162 return err;
10163}
10164
10165static void __exit nf_tables_module_exit(void)
10166{
10167 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 10168 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 10169 nft_offload_exit();
3b49e2e9 10170 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 10171 nft_chain_filter_fini();
c1deb065 10172 nft_chain_route_fini();
71ad00c5 10173 unregister_pernet_subsys(&nf_tables_net_ops);
0935d558 10174 cancel_work_sync(&trans_destroy_work);
1b1bc49c 10175 rcu_barrier();
4d44175a 10176 rhltable_destroy(&nft_objname_ht);
96518518 10177 nf_tables_core_module_exit();
96518518
PM		 10178}
10179
10180module_init(nf_tables_module_init);
10181module_exit(nf_tables_module_exit);
10182
10183MODULE_LICENSE("GPL");
10184MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
10185MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Linux 6.x block layer and io_uring tree(s)