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netfilter: nft_tunnel: restrict it to netdev family
[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;
745 strlcpy(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 &&
3a41c64d 2169 !nft_chain_offload_support(basechain))
d54725cd
PNA		 2170 return -EOPNOTSUPP;
2171
2172 flow_block_init(&basechain->flow_block);
2173
2174 return 0;
2175}
2176
04b7db41
PNA		 2177static int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
2178{
2179 int err;
2180
2181 err = rhltable_insert_key(&table->chains_ht, chain->name,
2182 &chain->rhlhead, nft_chain_ht_params);
2183 if (err)
2184 return err;
2185
2186 list_add_tail_rcu(&chain->list, &table->chains);
2187
2188 return 0;
2189}
2190
d0e2c7de
PNA		 2191static u64 chain_id;
2192
4035285f 2193static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
983c4fcb
PNA		 2194 u8 policy, u32 flags,
2195 struct netlink_ext_ack *extack)
4035285f
PNA		 2196{
2197 const struct nlattr * const *nla = ctx->nla;
43eb8949 2198 struct nft_stats __percpu *stats = NULL;
4035285f 2199 struct nft_table *table = ctx->table;
4035285f 2200 struct nft_base_chain *basechain;
4035285f 2201 struct net *net = ctx->net;
d0e2c7de 2202 char name[NFT_NAME_MAXLEN];
2c865a8a 2203 struct nft_rule_blob *blob;
66293c46 2204 struct nft_trans *trans;
4035285f 2205 struct nft_chain *chain;
2c865a8a 2206 unsigned int data_size;
4035285f
PNA		 2207 int err;
2208
2209 if (table->use == UINT_MAX)
2210 return -EOVERFLOW;
2211
2212 if (nla[NFTA_CHAIN_HOOK]) {
2213 struct nft_chain_hook hook;
4035285f 2214
d0e2c7de
PNA		 2215 if (flags & NFT_CHAIN_BINDING)
2216 return -EOPNOTSUPP;
2217
983c4fcb
PNA		 2218 err = nft_chain_parse_hook(net, nla, &hook, family, extack,
2219 true);
4035285f
PNA		 2220 if (err < 0)
2221 return err;
2222
33758c89 2223 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2224 if (basechain == NULL) {
2225 nft_chain_release_hook(&hook);
2226 return -ENOMEM;
2227 }
d54725cd 2228 chain = &basechain->chain;
4035285f
PNA		 2229
2230 if (nla[NFTA_CHAIN_COUNTERS]) {
2231 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2232 if (IS_ERR(stats)) {
2233 nft_chain_release_hook(&hook);
2234 kfree(basechain);
2235 return PTR_ERR(stats);
2236 }
4c05ec47 2237 rcu_assign_pointer(basechain->stats, stats);
4035285f
PNA		 2238 }
2239
d54725cd
PNA		 2240 err = nft_basechain_init(basechain, family, &hook, flags);
2241 if (err < 0) {
2242 nft_chain_release_hook(&hook);
2243 kfree(basechain);
2244 return err;
2245 }
4035285f 2246 } else {
d0e2c7de
PNA		 2247 if (flags & NFT_CHAIN_BASE)
2248 return -EINVAL;
2249 if (flags & NFT_CHAIN_HW_OFFLOAD)
2250 return -EOPNOTSUPP;
2251
33758c89 2252 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
4035285f
PNA		 2253 if (chain == NULL)
2254 return -ENOMEM;
d0e2c7de
PNA		 2255
2256 chain->flags = flags;
4035285f 2257 }
43a605f2
PNA		 2258 ctx->chain = chain;
2259
4035285f
PNA		 2260 INIT_LIST_HEAD(&chain->rules);
2261 chain->handle = nf_tables_alloc_handle(table);
2262 chain->table = table;
d0e2c7de
PNA		 2263
2264 if (nla[NFTA_CHAIN_NAME]) {
33758c89 2265 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
d0e2c7de 2266 } else {
59136aa3
FW		 2267 if (!(flags & NFT_CHAIN_BINDING)) {
2268 err = -EINVAL;
002f2176 2269 goto err_destroy_chain;
59136aa3 2270 }
d0e2c7de
PNA		 2271
2272 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
33758c89 2273 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
d0e2c7de
PNA		 2274 }
2275
4035285f
PNA		 2276 if (!chain->name) {
2277 err = -ENOMEM;
002f2176
JGG		 2278 goto err_destroy_chain;
2279 }
2280
2281 if (nla[NFTA_CHAIN_USERDATA]) {
33758c89 2282 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
002f2176
JGG		 2283 if (chain->udata == NULL) {
2284 err = -ENOMEM;
2285 goto err_destroy_chain;
2286 }
2287 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
4035285f
PNA		 2288 }
2289
2c865a8a
PNA		 2290 data_size = offsetof(struct nft_rule_dp, data); /* last rule */
2291 blob = nf_tables_chain_alloc_rules(data_size);
2292 if (!blob) {
0cbc06b3 2293 err = -ENOMEM;
002f2176 2294 goto err_destroy_chain;
0cbc06b3
FW		 2295 }
2296
2c865a8a
PNA		 2297 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2298 RCU_INIT_POINTER(chain->blob_gen_1, blob);
0cbc06b3 2299
c974a3a3 2300 err = nf_tables_register_hook(net, table, chain);
4035285f 2301 if (err < 0)
002f2176 2302 goto err_destroy_chain;
4035285f 2303
66293c46
FW		 2304 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2305 if (IS_ERR(trans)) {
2306 err = PTR_ERR(trans);
002f2176 2307 goto err_unregister_hook;
1b2470e5 2308 }
4035285f 2309
ad652f38 2310 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
66293c46
FW		 2311 if (nft_is_base_chain(chain))
2312 nft_trans_chain_policy(trans) = policy;
2313
04b7db41
PNA		 2314 err = nft_chain_add(table, chain);
2315 if (err < 0) {
2316 nft_trans_destroy(trans);
002f2176 2317 goto err_unregister_hook;
04b7db41
PNA		 2318 }
2319
43eb8949
PNA		 2320 if (stats)
2321 static_branch_inc(&nft_counters_enabled);
2322
4035285f 2323 table->use++;
4035285f
PNA		 2324
2325 return 0;
002f2176 2326err_unregister_hook:
c974a3a3 2327 nf_tables_unregister_hook(net, table, chain);
002f2176 2328err_destroy_chain:
43a605f2 2329 nf_tables_chain_destroy(ctx);
4035285f
PNA		 2330
2331 return err;
2332}
2333
d54725cd
PNA		 2334static bool nft_hook_list_equal(struct list_head *hook_list1,
2335 struct list_head *hook_list2)
2336{
2337 struct nft_hook *hook;
2338 int n = 0, m = 0;
2339
2340 n = 0;
2341 list_for_each_entry(hook, hook_list2, list) {
2342 if (!nft_hook_list_find(hook_list1, hook))
2343 return false;
2344
2345 n++;
2346 }
2347 list_for_each_entry(hook, hook_list1, list)
2348 m++;
2349
2350 return n == m;
2351}
2352
c9626a2c 2353static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
98a381a7
PNA		 2354 u32 flags, const struct nlattr *attr,
2355 struct netlink_ext_ack *extack)
2c4a488a
PNA		 2356{
2357 const struct nlattr * const *nla = ctx->nla;
2358 struct nft_table *table = ctx->table;
2359 struct nft_chain *chain = ctx->chain;
2c4a488a
PNA		 2360 struct nft_base_chain *basechain;
2361 struct nft_stats *stats = NULL;
2362 struct nft_chain_hook hook;
2c4a488a
PNA		 2363 struct nf_hook_ops *ops;
2364 struct nft_trans *trans;
c974a3a3 2365 int err;
2c4a488a 2366
c9626a2c
PNA		 2367 if (chain->flags ^ flags)
2368 return -EOPNOTSUPP;
2369
2c4a488a 2370 if (nla[NFTA_CHAIN_HOOK]) {
98a381a7
PNA		 2371 if (!nft_is_base_chain(chain)) {
2372 NL_SET_BAD_ATTR(extack, attr);
77a92189 2373 return -EEXIST;
98a381a7 2374 }
36596dad 2375 err = nft_chain_parse_hook(ctx->net, nla, &hook, ctx->family,
983c4fcb 2376 extack, false);
2c4a488a
PNA		 2377 if (err < 0)
2378 return err;
2379
2380 basechain = nft_base_chain(chain);
2381 if (basechain->type != hook.type) {
2382 nft_chain_release_hook(&hook);
98a381a7 2383 NL_SET_BAD_ATTR(extack, attr);
77a92189 2384 return -EEXIST;
2c4a488a
PNA		 2385 }
2386
d3519cb8 2387 if (nft_base_chain_netdev(ctx->family, hook.num)) {
d54725cd
PNA		 2388 if (!nft_hook_list_equal(&basechain->hook_list,
2389 &hook.list)) {
2390 nft_chain_release_hook(&hook);
98a381a7 2391 NL_SET_BAD_ATTR(extack, attr);
77a92189 2392 return -EEXIST;
d54725cd
PNA		 2393 }
2394 } else {
2395 ops = &basechain->ops;
2396 if (ops->hooknum != hook.num ||
2397 ops->priority != hook.priority) {
2398 nft_chain_release_hook(&hook);
98a381a7 2399 NL_SET_BAD_ATTR(extack, attr);
77a92189 2400 return -EEXIST;
d54725cd 2401 }
2c4a488a
PNA		 2402 }
2403 nft_chain_release_hook(&hook);
2404 }
2405
2406 if (nla[NFTA_CHAIN_HANDLE] &&
2407 nla[NFTA_CHAIN_NAME]) {
2408 struct nft_chain *chain2;
2409
f102d66b
FW		 2410 chain2 = nft_chain_lookup(ctx->net, table,
2411 nla[NFTA_CHAIN_NAME], genmask);
98a381a7
PNA		 2412 if (!IS_ERR(chain2)) {
2413 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
0d18779b 2414 return -EEXIST;
98a381a7 2415 }
2c4a488a
PNA		 2416 }
2417
2418 if (nla[NFTA_CHAIN_COUNTERS]) {
2419 if (!nft_is_base_chain(chain))
2420 return -EOPNOTSUPP;
2421
2422 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2423 if (IS_ERR(stats))
2424 return PTR_ERR(stats);
2425 }
2426
c6cc94df 2427 err = -ENOMEM;
2c4a488a
PNA		 2428 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2429 sizeof(struct nft_trans_chain));
c6cc94df
FW		 2430 if (trans == NULL)
2431 goto err;
2c4a488a
PNA		 2432
2433 nft_trans_chain_stats(trans) = stats;
2434 nft_trans_chain_update(trans) = true;
2435
2436 if (nla[NFTA_CHAIN_POLICY])
2437 nft_trans_chain_policy(trans) = policy;
2438 else
2439 nft_trans_chain_policy(trans) = -1;
2440
c6cc94df
FW		 2441 if (nla[NFTA_CHAIN_HANDLE] &&
2442 nla[NFTA_CHAIN_NAME]) {
d59d2f82 2443 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c6cc94df
FW		 2444 struct nft_trans *tmp;
2445 char *name;
2446
2447 err = -ENOMEM;
33758c89 2448 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
c6cc94df
FW		 2449 if (!name)
2450 goto err;
2451
2452 err = -EEXIST;
0854db2a 2453 list_for_each_entry(tmp, &nft_net->commit_list, list) {
c6cc94df
FW		 2454 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2455 tmp->ctx.table == table &&
2456 nft_trans_chain_update(tmp) &&
2457 nft_trans_chain_name(tmp) &&
2458 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
98a381a7 2459 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
c6cc94df
FW		 2460 kfree(name);
2461 goto err;
2462 }
2c4a488a 2463 }
c6cc94df
FW		 2464
2465 nft_trans_chain_name(trans) = name;
2c4a488a 2466 }
0854db2a 2467 nft_trans_commit_list_add_tail(ctx->net, trans);
2c4a488a
PNA		 2468
2469 return 0;
c6cc94df
FW		 2470err:
2471 free_percpu(stats);
2472 kfree(trans);
2473 return err;
2c4a488a
PNA		 2474}
2475
837830a4 2476static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
95f466d2 2477 const struct nft_table *table,
837830a4
PNA		 2478 const struct nlattr *nla)
2479{
d59d2f82 2480 struct nftables_pernet *nft_net = nft_pernet(net);
837830a4
PNA		 2481 u32 id = ntohl(nla_get_be32(nla));
2482 struct nft_trans *trans;
2483
0854db2a 2484 list_for_each_entry(trans, &nft_net->commit_list, list) {
837830a4
PNA		 2485 struct nft_chain *chain = trans->ctx.chain;
2486
2487 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
95f466d2 2488 chain->table == table &&
837830a4
PNA		 2489 id == nft_trans_chain_id(trans))
2490 return chain;
2491 }
2492 return ERR_PTR(-ENOENT);
2493}
2494
7dab8ee3
PNA		 2495static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2496 const struct nlattr * const nla[])
96518518 2497{
7dab8ee3 2498 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 2499 struct netlink_ext_ack *extack = info->extack;
2500 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2501 u8 family = info->nfmsg->nfgen_family;
74cccc3d 2502 struct nft_chain *chain = NULL;
7dab8ee3 2503 struct net *net = info->net;
36dd1bcc 2504 const struct nlattr *attr;
96518518 2505 struct nft_table *table;
57de2a0c 2506 u8 policy = NF_ACCEPT;
4035285f 2507 struct nft_ctx ctx;
96518518 2508 u64 handle = 0;
c9626a2c 2509 u32 flags = 0;
96518518 2510
0854db2a 2511 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 2512
6001a930
PNA		 2513 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2514 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2515 if (IS_ERR(table)) {
2516 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2517 return PTR_ERR(table);
36dd1bcc 2518 }
96518518 2519
96518518 2520 chain = NULL;
36dd1bcc 2521 attr = nla[NFTA_CHAIN_NAME];
96518518
PM		 2522
2523 if (nla[NFTA_CHAIN_HANDLE]) {
2524 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
cac20fcd 2525 chain = nft_chain_lookup_byhandle(table, handle, genmask);
36dd1bcc
PNA		 2526 if (IS_ERR(chain)) {
2527 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
96518518 2528 return PTR_ERR(chain);
36dd1bcc
PNA		 2529 }
2530 attr = nla[NFTA_CHAIN_HANDLE];
74cccc3d 2531 } else if (nla[NFTA_CHAIN_NAME]) {
f102d66b 2532 chain = nft_chain_lookup(net, table, attr, genmask);
96518518 2533 if (IS_ERR(chain)) {
36dd1bcc
PNA		 2534 if (PTR_ERR(chain) != -ENOENT) {
2535 NL_SET_BAD_ATTR(extack, attr);
96518518 2536 return PTR_ERR(chain);
36dd1bcc 2537 }
96518518
PM		 2538 chain = NULL;
2539 }
74cccc3d
PNA		 2540 } else if (!nla[NFTA_CHAIN_ID]) {
2541 return -EINVAL;
96518518
PM		 2542 }
2543
57de2a0c 2544 if (nla[NFTA_CHAIN_POLICY]) {
f323d954 2545 if (chain != NULL &&
36dd1bcc
PNA		 2546 !nft_is_base_chain(chain)) {
2547 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
d6b6cb1d 2548 return -EOPNOTSUPP;
36dd1bcc 2549 }
d6b6cb1d
PNA		 2550
2551 if (chain == NULL &&
36dd1bcc
PNA		 2552 nla[NFTA_CHAIN_HOOK] == NULL) {
2553 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
57de2a0c 2554 return -EOPNOTSUPP;
36dd1bcc 2555 }
57de2a0c 2556
8f46df18 2557 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
57de2a0c
PM		 2558 switch (policy) {
2559 case NF_DROP:
2560 case NF_ACCEPT:
2561 break;
2562 default:
2563 return -EINVAL;
2564 }
2565 }
2566
c9626a2c
PNA		 2567 if (nla[NFTA_CHAIN_FLAGS])
2568 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
b717273d
FW		 2569 else if (chain)
2570 flags = chain->flags;
c9626a2c 2571
c1f79a2e
PNA		 2572 if (flags & ~NFT_CHAIN_FLAGS)
2573 return -EOPNOTSUPP;
2574
7dab8ee3 2575 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4035285f 2576
96518518 2577 if (chain != NULL) {
5dc52d83
PNA		 2578 if (chain->flags & NFT_CHAIN_BINDING)
2579 return -EINVAL;
2580
7dab8ee3 2581 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 2582 NL_SET_BAD_ATTR(extack, attr);
96518518 2583 return -EEXIST;
36dd1bcc 2584 }
7dab8ee3 2585 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 2586 return -EOPNOTSUPP;
2587
67c49de4 2588 flags |= chain->flags & NFT_CHAIN_BASE;
98a381a7
PNA		 2589 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2590 extack);
96518518
PM		 2591 }
2592
983c4fcb 2593 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
96518518
PM		 2594}
2595
7dab8ee3
PNA		 2596static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2597 const struct nlattr * const nla[])
96518518 2598{
7dab8ee3
PNA		 2599 struct netlink_ext_ack *extack = info->extack;
2600 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 2601 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 2602 struct net *net = info->net;
36dd1bcc 2603 const struct nlattr *attr;
96518518
PM		 2604 struct nft_table *table;
2605 struct nft_chain *chain;
9dee1474 2606 struct nft_rule *rule;
91c7b38d 2607 struct nft_ctx ctx;
3ecbfd65 2608 u64 handle;
9dee1474
PNA		 2609 u32 use;
2610 int err;
96518518 2611
6001a930
PNA		 2612 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2613 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 2614 if (IS_ERR(table)) {
2615 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
96518518 2616 return PTR_ERR(table);
36dd1bcc 2617 }
96518518 2618
3ecbfd65 2619 if (nla[NFTA_CHAIN_HANDLE]) {
36dd1bcc
PNA		 2620 attr = nla[NFTA_CHAIN_HANDLE];
2621 handle = be64_to_cpu(nla_get_be64(attr));
cac20fcd 2622 chain = nft_chain_lookup_byhandle(table, handle, genmask);
3ecbfd65 2623 } else {
36dd1bcc 2624 attr = nla[NFTA_CHAIN_NAME];
f102d66b 2625 chain = nft_chain_lookup(net, table, attr, genmask);
3ecbfd65 2626 }
36dd1bcc
PNA		 2627 if (IS_ERR(chain)) {
2628 NL_SET_BAD_ATTR(extack, attr);
96518518 2629 return PTR_ERR(chain);
36dd1bcc 2630 }
9dee1474 2631
7dab8ee3 2632 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
9dee1474 2633 chain->use > 0)
96518518
PM		 2634 return -EBUSY;
2635
7dab8ee3 2636 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0165d932 2637
9dee1474
PNA		 2638 use = chain->use;
2639 list_for_each_entry(rule, &chain->rules, list) {
2640 if (!nft_is_active_next(net, rule))
2641 continue;
2642 use--;
2643
2644 err = nft_delrule(&ctx, rule);
2645 if (err < 0)
2646 return err;
2647 }
2648
2649 /* There are rules and elements that are still holding references to us,
2650 * we cannot do a recursive removal in this case.
2651 */
36dd1bcc
PNA		 2652 if (use > 0) {
2653 NL_SET_BAD_ATTR(extack, attr);
9dee1474 2654 return -EBUSY;
36dd1bcc 2655 }
9dee1474 2656
ee01d542 2657 return nft_delchain(&ctx);
96518518
PM		 2658}
2659
96518518
PM		 2660/*
2661 * Expressions
2662 */
2663
2664/**
ef1f7df9 2665 * nft_register_expr - register nf_tables expr type
3db86c39 2666 * @type: expr type
96518518 2667 *
ef1f7df9 2668 * Registers the expr type for use with nf_tables. Returns zero on
96518518
PM		 2669 * success or a negative errno code otherwise.
2670 */
ef1f7df9 2671int nft_register_expr(struct nft_expr_type *type)
96518518
PM		 2672{
2673 nfnl_lock(NFNL_SUBSYS_NFTABLES);
758dbcec 2674 if (type->family == NFPROTO_UNSPEC)
e688a7f8 2675 list_add_tail_rcu(&type->list, &nf_tables_expressions);
758dbcec 2676 else
e688a7f8 2677 list_add_rcu(&type->list, &nf_tables_expressions);
96518518
PM		 2678 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2679 return 0;
2680}
2681EXPORT_SYMBOL_GPL(nft_register_expr);
2682
2683/**
ef1f7df9 2684 * nft_unregister_expr - unregister nf_tables expr type
3db86c39 2685 * @type: expr type
96518518 2686 *
ef1f7df9 2687 * Unregisters the expr typefor use with nf_tables.
96518518 2688 */
ef1f7df9 2689void nft_unregister_expr(struct nft_expr_type *type)
96518518
PM		 2690{
2691 nfnl_lock(NFNL_SUBSYS_NFTABLES);
e688a7f8 2692 list_del_rcu(&type->list);
96518518
PM		 2693 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2694}
2695EXPORT_SYMBOL_GPL(nft_unregister_expr);
2696
64d46806
PM		 2697static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2698 struct nlattr *nla)
96518518 2699{
9cff126f 2700 const struct nft_expr_type *type, *candidate = NULL;
96518518 2701
ef1f7df9 2702 list_for_each_entry(type, &nf_tables_expressions, list) {
9cff126f
PNA		 2703 if (!nla_strcmp(nla, type->name)) {
2704 if (!type->family && !candidate)
2705 candidate = type;
2706 else if (type->family == family)
2707 candidate = type;
2708 }
96518518 2709 }
9cff126f 2710 return candidate;
96518518
PM		 2711}
2712
b9c04ae7
PNA		 2713#ifdef CONFIG_MODULES
2714static int nft_expr_type_request_module(struct net *net, u8 family,
2715 struct nlattr *nla)
2716{
eb014de4
PNA		 2717 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
2718 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
b9c04ae7
PNA		 2719 return -EAGAIN;
2720
2721 return 0;
2722}
2723#endif
2724
452238e8
FW		 2725static const struct nft_expr_type *nft_expr_type_get(struct net *net,
2726 u8 family,
64d46806 2727 struct nlattr *nla)
96518518 2728{
ef1f7df9 2729 const struct nft_expr_type *type;
96518518
PM		 2730
2731 if (nla == NULL)
2732 return ERR_PTR(-EINVAL);
2733
64d46806 2734 type = __nft_expr_type_get(family, nla);
ef1f7df9
PM		 2735 if (type != NULL && try_module_get(type->owner))
2736 return type;
96518518 2737
f102d66b 2738 lockdep_nfnl_nft_mutex_not_held();
96518518 2739#ifdef CONFIG_MODULES
ef1f7df9 2740 if (type == NULL) {
b9c04ae7 2741 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
64d46806
PM		 2742 return ERR_PTR(-EAGAIN);
2743
eb014de4
PNA		 2744 if (nft_request_module(net, "nft-expr-%.*s",
2745 nla_len(nla),
2746 (char *)nla_data(nla)) == -EAGAIN)
96518518
PM		 2747 return ERR_PTR(-EAGAIN);
2748 }
2749#endif
2750 return ERR_PTR(-ENOENT);
2751}
2752
2753static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
9332d27d
FW		 2754 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
2755 .len = NFT_MODULE_AUTOLOAD_LIMIT },
96518518
PM		 2756 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
2757};
2758
2759static int nf_tables_fill_expr_info(struct sk_buff *skb,
2760 const struct nft_expr *expr)
2761{
ef1f7df9 2762 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
96518518
PM		 2763 goto nla_put_failure;
2764
2765 if (expr->ops->dump) {
ae0be8de
MK		 2766 struct nlattr *data = nla_nest_start_noflag(skb,
2767 NFTA_EXPR_DATA);
96518518
PM		 2768 if (data == NULL)
2769 goto nla_put_failure;
2770 if (expr->ops->dump(skb, expr) < 0)
2771 goto nla_put_failure;
2772 nla_nest_end(skb, data);
2773 }
2774
2775 return skb->len;
2776
2777nla_put_failure:
2778 return -1;
2779};
2780
0b2d8a7b
PM		 2781int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
2782 const struct nft_expr *expr)
2783{
2784 struct nlattr *nest;
2785
ae0be8de 2786 nest = nla_nest_start_noflag(skb, attr);
0b2d8a7b
PM		 2787 if (!nest)
2788 goto nla_put_failure;
2789 if (nf_tables_fill_expr_info(skb, expr) < 0)
2790 goto nla_put_failure;
2791 nla_nest_end(skb, nest);
2792 return 0;
2793
2794nla_put_failure:
2795 return -1;
2796}
2797
96518518
PM		 2798struct nft_expr_info {
2799 const struct nft_expr_ops *ops;
83d9dcba 2800 const struct nlattr *attr;
ef1f7df9 2801 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
96518518
PM		 2802};
2803
0ca743a5
PNA		 2804static int nf_tables_expr_parse(const struct nft_ctx *ctx,
2805 const struct nlattr *nla,
96518518
PM		 2806 struct nft_expr_info *info)
2807{
ef1f7df9 2808 const struct nft_expr_type *type;
96518518 2809 const struct nft_expr_ops *ops;
ef1f7df9 2810 struct nlattr *tb[NFTA_EXPR_MAX + 1];
96518518
PM		 2811 int err;
2812
8cb08174
JB		 2813 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
2814 nft_expr_policy, NULL);
96518518
PM		 2815 if (err < 0)
2816 return err;
2817
452238e8 2818 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
ef1f7df9
PM		 2819 if (IS_ERR(type))
2820 return PTR_ERR(type);
2821
2822 if (tb[NFTA_EXPR_DATA]) {
8cb08174
JB		 2823 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
2824 tb[NFTA_EXPR_DATA],
2825 type->policy, NULL);
ef1f7df9
PM		 2826 if (err < 0)
2827 goto err1;
2828 } else
2829 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
2830
2831 if (type->select_ops != NULL) {
0ca743a5
PNA		 2832 ops = type->select_ops(ctx,
2833 (const struct nlattr * const *)info->tb);
ef1f7df9
PM		 2834 if (IS_ERR(ops)) {
2835 err = PTR_ERR(ops);
0ef1efd1
PNA		 2836#ifdef CONFIG_MODULES
2837 if (err == -EAGAIN)
eb014de4
PNA		 2838 if (nft_expr_type_request_module(ctx->net,
2839 ctx->family,
2840 tb[NFTA_EXPR_NAME]) != -EAGAIN)
2841 err = -ENOENT;
0ef1efd1 2842#endif
ef1f7df9
PM		 2843 goto err1;
2844 }
2845 } else
2846 ops = type->ops;
2847
83d9dcba 2848 info->attr = nla;
96518518 2849 info->ops = ops;
83d9dcba 2850
96518518 2851 return 0;
ef1f7df9
PM		 2852
2853err1:
2854 module_put(type->owner);
2855 return err;
96518518
PM		 2856}
2857
2858static int nf_tables_newexpr(const struct nft_ctx *ctx,
7dab8ee3 2859 const struct nft_expr_info *expr_info,
96518518
PM		 2860 struct nft_expr *expr)
2861{
7dab8ee3 2862 const struct nft_expr_ops *ops = expr_info->ops;
96518518
PM		 2863 int err;
2864
2865 expr->ops = ops;
2866 if (ops->init) {
7dab8ee3 2867 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
96518518
PM		 2868 if (err < 0)
2869 goto err1;
2870 }
2871
96518518 2872 return 0;
96518518
PM		 2873err1:
2874 expr->ops = NULL;
2875 return err;
2876}
2877
62472bce
PM		 2878static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
2879 struct nft_expr *expr)
96518518 2880{
3f3a390d
PNA		 2881 const struct nft_expr_type *type = expr->ops->type;
2882
96518518 2883 if (expr->ops->destroy)
62472bce 2884 expr->ops->destroy(ctx, expr);
3f3a390d 2885 module_put(type->owner);
96518518
PM		 2886}
2887
795a6d6b
PNA		 2888static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
2889 const struct nlattr *nla)
0b2d8a7b 2890{
7dab8ee3 2891 struct nft_expr_info expr_info;
0b2d8a7b 2892 struct nft_expr *expr;
b8e20400 2893 struct module *owner;
0b2d8a7b
PM		 2894 int err;
2895
7dab8ee3 2896 err = nf_tables_expr_parse(ctx, nla, &expr_info);
0b2d8a7b 2897 if (err < 0)
52077804
PNA		 2898 goto err_expr_parse;
2899
2900 err = -EOPNOTSUPP;
2901 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
2902 goto err_expr_stateful;
0b2d8a7b
PM		 2903
2904 err = -ENOMEM;
33758c89 2905 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
0b2d8a7b 2906 if (expr == NULL)
52077804 2907 goto err_expr_stateful;
0b2d8a7b 2908
7dab8ee3 2909 err = nf_tables_newexpr(ctx, &expr_info, expr);
0b2d8a7b 2910 if (err < 0)
52077804 2911 goto err_expr_new;
0b2d8a7b
PM		 2912
2913 return expr;
52077804 2914err_expr_new:
6cafaf47 2915 kfree(expr);
52077804 2916err_expr_stateful:
7dab8ee3
PNA		 2917 owner = expr_info.ops->type->owner;
2918 if (expr_info.ops->type->release_ops)
2919 expr_info.ops->type->release_ops(expr_info.ops);
b8e20400
PNA		 2920
2921 module_put(owner);
52077804 2922err_expr_parse:
0b2d8a7b
PM		 2923 return ERR_PTR(err);
2924}
2925
c604cc69
PNA		 2926int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
2927{
2928 int err;
2929
2930 if (src->ops->clone) {
2931 dst->ops = src->ops;
2932 err = src->ops->clone(dst, src);
2933 if (err < 0)
2934 return err;
2935 } else {
2936 memcpy(dst, src, src->ops->size);
2937 }
2938
2939 __module_get(src->ops->type->owner);
2940
2941 return 0;
2942}
2943
0b2d8a7b
PM		 2944void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
2945{
2946 nf_tables_expr_destroy(ctx, expr);
2947 kfree(expr);
2948}
2949
96518518
PM		 2950/*
2951 * Rules
2952 */
2953
cac20fcd
PNA		 2954static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
2955 u64 handle)
96518518
PM		 2956{
2957 struct nft_rule *rule;
2958
2959 // FIXME: this sucks
d9adf22a 2960 list_for_each_entry_rcu(rule, &chain->rules, list) {
96518518
PM		 2961 if (handle == rule->handle)
2962 return rule;
2963 }
2964
2965 return ERR_PTR(-ENOENT);
2966}
2967
cac20fcd
PNA		 2968static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
2969 const struct nlattr *nla)
96518518
PM		 2970{
2971 if (nla == NULL)
2972 return ERR_PTR(-EINVAL);
2973
cac20fcd 2974 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
96518518
PM		 2975}
2976
2977static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
b2fbd044
LZ		 2978 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
2979 .len = NFT_TABLE_MAXNAMELEN - 1 },
96518518
PM		 2980 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
2981 .len = NFT_CHAIN_MAXNAMELEN - 1 },
2982 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
2983 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
0ca743a5 2984 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
5e948466 2985 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
0768b3b3
PNA		 2986 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
2987 .len = NFT_USERDATA_MAXLEN },
467697d2 2988 [NFTA_RULE_ID] = { .type = NLA_U32 },
0604628b 2989 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
837830a4 2990 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 2991};
2992
84d7fce6
PNA		 2993static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
2994 u32 portid, u32 seq, int event,
2995 u32 flags, int family,
96518518
PM		 2996 const struct nft_table *table,
2997 const struct nft_chain *chain,
e189ae16 2998 const struct nft_rule *rule, u64 handle)
96518518
PM		 2999{
3000 struct nlmsghdr *nlh;
96518518
PM		 3001 const struct nft_expr *expr, *next;
3002 struct nlattr *list;
dedb67c4 3003 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
96518518 3004
19c28b13
PNA		 3005 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3006 nft_base_seq(net));
3007 if (!nlh)
96518518
PM		 3008 goto nla_put_failure;
3009
96518518
PM		 3010 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3011 goto nla_put_failure;
3012 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3013 goto nla_put_failure;
b46f6ded
ND		 3014 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3015 NFTA_RULE_PAD))
96518518
PM		 3016 goto nla_put_failure;
3017
e189ae16
PNA		 3018 if (event != NFT_MSG_DELRULE && handle) {
3019 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
b46f6ded 3020 NFTA_RULE_PAD))
5e948466
EL		 3021 goto nla_put_failure;
3022 }
3023
b72920f6
PNA		 3024 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3025 nft_flow_rule_stats(chain, rule);
3026
ae0be8de 3027 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
96518518
PM		 3028 if (list == NULL)
3029 goto nla_put_failure;
3030 nft_rule_for_each_expr(expr, next, rule) {
0b2d8a7b 3031 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
96518518 3032 goto nla_put_failure;
96518518
PM		 3033 }
3034 nla_nest_end(skb, list);
3035
86f1ec32
PM		 3036 if (rule->udata) {
3037 struct nft_userdata *udata = nft_userdata(rule);
3038 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3039 udata->data) < 0)
3040 goto nla_put_failure;
3041 }
0768b3b3 3042
053c095a
JB		 3043 nlmsg_end(skb, nlh);
3044 return 0;
96518518
PM		 3045
3046nla_put_failure:
3047 nlmsg_trim(skb, nlh);
3048 return -1;
3049}
3050
25e94a99
PNA		 3051static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3052 const struct nft_rule *rule, int event)
96518518 3053{
d59d2f82 3054 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
e189ae16 3055 const struct nft_rule *prule;
96518518 3056 struct sk_buff *skb;
e189ae16
PNA		 3057 u64 handle = 0;
3058 u16 flags = 0;
96518518
PM		 3059 int err;
3060
128ad332
PNA		 3061 if (!ctx->report &&
3062 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 3063 return;
96518518 3064
96518518
PM		 3065 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3066 if (skb == NULL)
3067 goto err;
3068
e189ae16
PNA		 3069 if (event == NFT_MSG_NEWRULE &&
3070 !list_is_first(&rule->list, &ctx->chain->rules) &&
3071 !list_is_last(&rule->list, &ctx->chain->rules)) {
3072 prule = list_prev_entry(rule, list);
3073 handle = prule->handle;
3074 }
3075 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3076 flags |= NLM_F_APPEND;
6fb721cf
PNA		 3077 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3078 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
e189ae16 3079
84d7fce6 3080 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
e189ae16
PNA		 3081 event, flags, ctx->family, ctx->table,
3082 ctx->chain, rule, handle);
96518518
PM		 3083 if (err < 0) {
3084 kfree_skb(skb);
3085 goto err;
3086 }
3087
0854db2a 3088 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 3089 return;
96518518 3090err:
25e94a99 3091 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
96518518
PM		 3092}
3093
6e1f760e 3094struct nft_rule_dump_ctx {
e46abbcc 3095 char *table;
b7263e07 3096 char *chain;
6e1f760e
PNA		 3097};
3098
241faece
PS		 3099static int __nf_tables_dump_rules(struct sk_buff *skb,
3100 unsigned int *idx,
3101 struct netlink_callback *cb,
3102 const struct nft_table *table,
3103 const struct nft_chain *chain)
3104{
3105 struct net *net = sock_net(skb->sk);
2c82c7e7 3106 const struct nft_rule *rule, *prule;
241faece 3107 unsigned int s_idx = cb->args[0];
e189ae16 3108 u64 handle;
241faece 3109
2c82c7e7 3110 prule = NULL;
241faece
PS		 3111 list_for_each_entry_rcu(rule, &chain->rules, list) {
3112 if (!nft_is_active(net, rule))
2c82c7e7 3113 goto cont_skip;
241faece
PS		 3114 if (*idx < s_idx)
3115 goto cont;
3116 if (*idx > s_idx) {
3117 memset(&cb->args[1], 0,
3118 sizeof(cb->args) - sizeof(cb->args[0]));
3119 }
e189ae16
PNA		 3120 if (prule)
3121 handle = prule->handle;
3122 else
3123 handle = 0;
3124
241faece
PS		 3125 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3126 cb->nlh->nlmsg_seq,
3127 NFT_MSG_NEWRULE,
3128 NLM_F_MULTI | NLM_F_APPEND,
3129 table->family,
e189ae16 3130 table, chain, rule, handle) < 0)
310529e6 3131 return 1;
241faece
PS		 3132
3133 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3134cont:
2c82c7e7
FW		 3135 prule = rule;
3136cont_skip:
241faece
PS		 3137 (*idx)++;
3138 }
310529e6 3139 return 0;
241faece
PS		 3140}
3141
96518518
PM		 3142static int nf_tables_dump_rules(struct sk_buff *skb,
3143 struct netlink_callback *cb)
3144{
3145 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6e1f760e 3146 const struct nft_rule_dump_ctx *ctx = cb->data;
241faece 3147 struct nft_table *table;
96518518 3148 const struct nft_chain *chain;
241faece 3149 unsigned int idx = 0;
99633ab2 3150 struct net *net = sock_net(skb->sk);
96518518 3151 int family = nfmsg->nfgen_family;
0854db2a 3152 struct nftables_pernet *nft_net;
96518518 3153
e688a7f8 3154 rcu_read_lock();
d59d2f82 3155 nft_net = nft_pernet(net);
34002783 3156 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 3157
0854db2a 3158 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 3159 if (family != NFPROTO_UNSPEC && family != table->family)
36596dad
PNA		 3160 continue;
3161
3162 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
96518518
PM		 3163 continue;
3164
715849ab 3165 if (ctx && ctx->table && ctx->chain) {
241faece 3166 struct rhlist_head *list, *tmp;
6e1f760e 3167
241faece
PS		 3168 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3169 nft_chain_ht_params);
3170 if (!list)
3171 goto done;
3172
3173 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3174 if (!nft_is_active(net, chain))
3175 continue;
3176 __nf_tables_dump_rules(skb, &idx,
3177 cb, table, chain);
3178 break;
96518518 3179 }
241faece 3180 goto done;
96518518 3181 }
241faece
PS		 3182
3183 list_for_each_entry_rcu(chain, &table->chains, list) {
3184 if (__nf_tables_dump_rules(skb, &idx, cb, table, chain))
3185 goto done;
3186 }
3187
3188 if (ctx && ctx->table)
3189 break;
96518518
PM		 3190 }
3191done:
e688a7f8 3192 rcu_read_unlock();
310529e6
PS		 3193
3194 cb->args[0] = idx;
96518518
PM		 3195 return skb->len;
3196}
3197
90fd131a
FW		 3198static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3199{
3200 const struct nlattr * const *nla = cb->data;
3201 struct nft_rule_dump_ctx *ctx = NULL;
3202
3203 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3204 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3205 if (!ctx)
3206 return -ENOMEM;
3207
3208 if (nla[NFTA_RULE_TABLE]) {
3209 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3210 GFP_ATOMIC);
3211 if (!ctx->table) {
3212 kfree(ctx);
3213 return -ENOMEM;
3214 }
3215 }
3216 if (nla[NFTA_RULE_CHAIN]) {
3217 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3218 GFP_ATOMIC);
3219 if (!ctx->chain) {
3220 kfree(ctx->table);
3221 kfree(ctx);
3222 return -ENOMEM;
3223 }
3224 }
3225 }
3226
3227 cb->data = ctx;
3228 return 0;
3229}
3230
6e1f760e
PNA		 3231static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3232{
e46abbcc
PS		 3233 struct nft_rule_dump_ctx *ctx = cb->data;
3234
3235 if (ctx) {
3236 kfree(ctx->table);
b7263e07 3237 kfree(ctx->chain);
e46abbcc
PS		 3238 kfree(ctx);
3239 }
6e1f760e
PNA		 3240 return 0;
3241}
3242
d9adf22a 3243/* called with rcu_read_lock held */
797d4980
PNA		 3244static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3245 const struct nlattr * const nla[])
96518518 3246{
797d4980
PNA		 3247 struct netlink_ext_ack *extack = info->extack;
3248 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 3249 u8 family = info->nfmsg->nfgen_family;
96518518
PM		 3250 const struct nft_chain *chain;
3251 const struct nft_rule *rule;
797d4980 3252 struct net *net = info->net;
1b2470e5 3253 struct nft_table *table;
96518518 3254 struct sk_buff *skb2;
96518518
PM		 3255 int err;
3256
797d4980 3257 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
96518518 3258 struct netlink_dump_control c = {
90fd131a 3259 .start= nf_tables_dump_rules_start,
96518518 3260 .dump = nf_tables_dump_rules,
6e1f760e 3261 .done = nf_tables_dump_rules_done,
d9adf22a 3262 .module = THIS_MODULE,
90fd131a 3263 .data = (void *)nla,
96518518 3264 };
6e1f760e 3265
797d4980 3266 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
96518518
PM		 3267 }
3268
6001a930 3269 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
36dd1bcc
PNA		 3270 if (IS_ERR(table)) {
3271 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3272 return PTR_ERR(table);
36dd1bcc 3273 }
96518518 3274
f102d66b 3275 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
36dd1bcc
PNA		 3276 if (IS_ERR(chain)) {
3277 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
96518518 3278 return PTR_ERR(chain);
36dd1bcc 3279 }
96518518 3280
cac20fcd 3281 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3282 if (IS_ERR(rule)) {
3283 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3284 return PTR_ERR(rule);
36dd1bcc 3285 }
96518518 3286
d9adf22a 3287 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
96518518
PM		 3288 if (!skb2)
3289 return -ENOMEM;
3290
84d7fce6 3291 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 3292 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
e189ae16 3293 family, table, chain, rule, 0);
96518518 3294 if (err < 0)
ee921183 3295 goto err_fill_rule_info;
96518518 3296
ee921183 3297 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
96518518 3298
ee921183 3299err_fill_rule_info:
96518518
PM		 3300 kfree_skb(skb2);
3301 return err;
3302}
3303
62472bce
PM		 3304static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
3305 struct nft_rule *rule)
96518518 3306{
29e38801 3307 struct nft_expr *expr, *next;
96518518
PM		 3308
3309 /*
3310 * Careful: some expressions might not be initialized in case this
3311 * is called on error from nf_tables_newrule().
3312 */
3313 expr = nft_expr_first(rule);
31cc578a 3314 while (nft_expr_more(rule, expr)) {
29e38801 3315 next = nft_expr_next(expr);
62472bce 3316 nf_tables_expr_destroy(ctx, expr);
29e38801 3317 expr = next;
96518518
PM		 3318 }
3319 kfree(rule);
3320}
3321
d0e2c7de 3322void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
bb7b40ae 3323{
f6ac8585 3324 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
bb7b40ae
PNA		 3325 nf_tables_rule_destroy(ctx, rule);
3326}
3327
a654de8f
PNA		 3328int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3329{
3330 struct nft_expr *expr, *last;
3331 const struct nft_data *data;
3332 struct nft_rule *rule;
3333 int err;
3334
26b2f552
TY		 3335 if (ctx->level == NFT_JUMP_STACK_SIZE)
3336 return -EMLINK;
3337
a654de8f
PNA		 3338 list_for_each_entry(rule, &chain->rules, list) {
3339 if (!nft_is_active_next(ctx->net, rule))
3340 continue;
3341
3342 nft_rule_for_each_expr(expr, last, rule) {
3343 if (!expr->ops->validate)
3344 continue;
3345
3346 err = expr->ops->validate(ctx, expr, &data);
3347 if (err < 0)
3348 return err;
3349 }
81ea0106
FW		 3350
3351 cond_resched();
a654de8f
PNA		 3352 }
3353
3354 return 0;
3355}
3356EXPORT_SYMBOL_GPL(nft_chain_validate);
3357
3358static int nft_table_validate(struct net *net, const struct nft_table *table)
3359{
3360 struct nft_chain *chain;
3361 struct nft_ctx ctx = {
3362 .net = net,
3363 .family = table->family,
3364 };
3365 int err;
3366
3367 list_for_each_entry(chain, &table->chains, list) {
3368 if (!nft_is_base_chain(chain))
3369 continue;
3370
3371 ctx.chain = chain;
3372 err = nft_chain_validate(&ctx, chain);
3373 if (err < 0)
3374 return err;
3375 }
3376
3377 return 0;
3378}
3379
75dd48e2 3380static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3381 const struct nft_chain *chain,
75dd48e2
PS		 3382 const struct nlattr *nla);
3383
1081d11b
PNA		 3384#define NFT_RULE_MAXEXPRS 128
3385
7dab8ee3
PNA		 3386static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3387 const struct nlattr * const nla[])
96518518 3388{
7dab8ee3 3389 struct nftables_pernet *nft_net = nft_pernet(info->net);
7dab8ee3
PNA		 3390 struct netlink_ext_ack *extack = info->extack;
3391 unsigned int size, i, n, ulen = 0, usize = 0;
3392 u8 genmask = nft_genmask_next(info->net);
3393 struct nft_rule *rule, *old_rule = NULL;
3394 struct nft_expr_info *expr_info = NULL;
ef4b65e5 3395 u8 family = info->nfmsg->nfgen_family;
3c5e4462 3396 struct nft_flow_rule *flow = NULL;
7dab8ee3 3397 struct net *net = info->net;
7dab8ee3 3398 struct nft_userdata *udata;
96518518
PM		 3399 struct nft_table *table;
3400 struct nft_chain *chain;
7dab8ee3
PNA		 3401 struct nft_trans *trans;
3402 u64 handle, pos_handle;
96518518
PM		 3403 struct nft_expr *expr;
3404 struct nft_ctx ctx;
3405 struct nlattr *tmp;
96518518 3406 int err, rem;
96518518 3407
0854db2a 3408 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3409
6001a930
PNA		 3410 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3411 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3412 if (IS_ERR(table)) {
3413 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3414 return PTR_ERR(table);
36dd1bcc 3415 }
96518518 3416
837830a4
PNA		 3417 if (nla[NFTA_RULE_CHAIN]) {
3418 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3419 genmask);
3420 if (IS_ERR(chain)) {
3421 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3422 return PTR_ERR(chain);
3423 }
d0e2c7de
PNA		 3424 if (nft_chain_is_bound(chain))
3425 return -EOPNOTSUPP;
3426
837830a4 3427 } else if (nla[NFTA_RULE_CHAIN_ID]) {
95f466d2 3428 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID]);
837830a4
PNA		 3429 if (IS_ERR(chain)) {
3430 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3431 return PTR_ERR(chain);
3432 }
3433 } else {
3434 return -EINVAL;
36dd1bcc 3435 }
96518518
PM		 3436
3437 if (nla[NFTA_RULE_HANDLE]) {
3438 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
cac20fcd 3439 rule = __nft_rule_lookup(chain, handle);
36dd1bcc
PNA		 3440 if (IS_ERR(rule)) {
3441 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3442 return PTR_ERR(rule);
36dd1bcc 3443 }
96518518 3444
7dab8ee3 3445 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 3446 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
96518518 3447 return -EEXIST;
36dd1bcc 3448 }
7dab8ee3 3449 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3450 old_rule = rule;
3451 else
3452 return -EOPNOTSUPP;
3453 } else {
7dab8ee3
PNA		 3454 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3455 info->nlh->nlmsg_flags & NLM_F_REPLACE)
96518518
PM		 3456 return -EINVAL;
3457 handle = nf_tables_alloc_handle(table);
a0a7379e
PNA		 3458
3459 if (chain->use == UINT_MAX)
3460 return -EOVERFLOW;
5e948466 3461
447750f2
FW		 3462 if (nla[NFTA_RULE_POSITION]) {
3463 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3464 old_rule = __nft_rule_lookup(chain, pos_handle);
3465 if (IS_ERR(old_rule)) {
3466 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3467 return PTR_ERR(old_rule);
3468 }
75dd48e2 3469 } else if (nla[NFTA_RULE_POSITION_ID]) {
36d5b291 3470 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
75dd48e2
PS		 3471 if (IS_ERR(old_rule)) {
3472 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3473 return PTR_ERR(old_rule);
3474 }
36dd1bcc 3475 }
5e948466
EL		 3476 }
3477
7dab8ee3 3478 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0ca743a5 3479
96518518
PM		 3480 n = 0;
3481 size = 0;
3482 if (nla[NFTA_RULE_EXPRESSIONS]) {
7dab8ee3
PNA		 3483 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3484 sizeof(struct nft_expr_info),
3485 GFP_KERNEL);
3486 if (!expr_info)
2a43ecf9
FW		 3487 return -ENOMEM;
3488
96518518
PM		 3489 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3490 err = -EINVAL;
3491 if (nla_type(tmp) != NFTA_LIST_ELEM)
3c5e4462 3492 goto err_release_expr;
96518518 3493 if (n == NFT_RULE_MAXEXPRS)
3c5e4462 3494 goto err_release_expr;
7dab8ee3 3495 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
c781471d
PNA		 3496 if (err < 0) {
3497 NL_SET_BAD_ATTR(extack, tmp);
3c5e4462 3498 goto err_release_expr;
c781471d 3499 }
7dab8ee3 3500 size += expr_info[n].ops->size;
96518518
PM		 3501 n++;
3502 }
3503 }
9889840f
PM		 3504 /* Check for overflow of dlen field */
3505 err = -EFBIG;
3506 if (size >= 1 << 12)
3c5e4462 3507 goto err_release_expr;
96518518 3508
86f1ec32 3509 if (nla[NFTA_RULE_USERDATA]) {
0768b3b3 3510 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
86f1ec32
PM		 3511 if (ulen > 0)
3512 usize = sizeof(struct nft_userdata) + ulen;
3513 }
0768b3b3 3514
96518518 3515 err = -ENOMEM;
33758c89 3516 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
96518518 3517 if (rule == NULL)
3c5e4462 3518 goto err_release_expr;
96518518 3519
889f7ee7 3520 nft_activate_next(net, rule);
0628b123 3521
96518518
PM		 3522 rule->handle = handle;
3523 rule->dlen = size;
86f1ec32 3524 rule->udata = ulen ? 1 : 0;
0768b3b3 3525
86f1ec32
PM		 3526 if (ulen) {
3527 udata = nft_userdata(rule);
3528 udata->len = ulen - 1;
3529 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3530 }
96518518 3531
96518518
PM		 3532 expr = nft_expr_first(rule);
3533 for (i = 0; i < n; i++) {
7dab8ee3 3534 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
83d9dcba 3535 if (err < 0) {
7dab8ee3 3536 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3c5e4462 3537 goto err_release_rule;
83d9dcba 3538 }
a654de8f 3539
7dab8ee3 3540 if (expr_info[i].ops->validate)
a654de8f
PNA		 3541 nft_validate_state_update(net, NFT_VALIDATE_NEED);
3542
7dab8ee3 3543 expr_info[i].ops = NULL;
96518518
PM		 3544 expr = nft_expr_next(expr);
3545 }
3546
3c5e4462
PNA		 3547 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3548 flow = nft_flow_rule_create(net, rule);
3549 if (IS_ERR(flow)) {
3550 err = PTR_ERR(flow);
3551 goto err_release_rule;
3552 }
3553 }
3554
7dab8ee3 3555 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
2c964c55
PNA		 3556 err = nft_delrule(&ctx, old_rule);
3557 if (err < 0)
3558 goto err_destroy_flow_rule;
3559
ca089878 3560 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
569ccae6
FW		 3561 if (trans == NULL) {
3562 err = -ENOMEM;
3c5e4462 3563 goto err_destroy_flow_rule;
569ccae6 3564 }
569ccae6
FW		 3565 list_add_tail_rcu(&rule->list, &old_rule->list);
3566 } else {
c9626a2c
PNA		 3567 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3568 if (!trans) {
569ccae6 3569 err = -ENOMEM;
3c5e4462 3570 goto err_destroy_flow_rule;
569ccae6
FW		 3571 }
3572
7dab8ee3 3573 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
569ccae6
FW		 3574 if (old_rule)
3575 list_add_rcu(&rule->list, &old_rule->list);
3576 else
3577 list_add_tail_rcu(&rule->list, &chain->rules);
3578 } else {
3579 if (old_rule)
3580 list_add_tail_rcu(&rule->list, &old_rule->list);
3581 else
3582 list_add_rcu(&rule->list, &chain->rules);
3583 }
0628b123 3584 }
7dab8ee3 3585 kvfree(expr_info);
4fefee57 3586 chain->use++;
96518518 3587
3c5e4462
PNA		 3588 if (flow)
3589 nft_trans_flow_rule(trans) = flow;
3590
0854db2a 3591 if (nft_net->validate_state == NFT_VALIDATE_DO)
a654de8f
PNA		 3592 return nft_table_validate(net, table);
3593
3594 return 0;
3c5e4462
PNA		 3595
3596err_destroy_flow_rule:
4ca041f9
CIK		 3597 if (flow)
3598 nft_flow_rule_destroy(flow);
3c5e4462 3599err_release_rule:
bb7b40ae 3600 nf_tables_rule_release(&ctx, rule);
3c5e4462 3601err_release_expr:
96518518 3602 for (i = 0; i < n; i++) {
7dab8ee3
PNA		 3603 if (expr_info[i].ops) {
3604 module_put(expr_info[i].ops->type->owner);
3605 if (expr_info[i].ops->type->release_ops)
3606 expr_info[i].ops->type->release_ops(expr_info[i].ops);
b25a31bf 3607 }
96518518 3608 }
7dab8ee3
PNA		 3609 kvfree(expr_info);
3610
96518518
PM		 3611 return err;
3612}
3613
1a94e38d 3614static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
36d5b291 3615 const struct nft_chain *chain,
1a94e38d
PNA		 3616 const struct nlattr *nla)
3617{
d59d2f82 3618 struct nftables_pernet *nft_net = nft_pernet(net);
1a94e38d
PNA		 3619 u32 id = ntohl(nla_get_be32(nla));
3620 struct nft_trans *trans;
3621
0854db2a 3622 list_for_each_entry(trans, &nft_net->commit_list, list) {
1a94e38d
PNA		 3623 struct nft_rule *rule = nft_trans_rule(trans);
3624
3625 if (trans->msg_type == NFT_MSG_NEWRULE &&
36d5b291 3626 trans->ctx.chain == chain &&
1a94e38d
PNA		 3627 id == nft_trans_rule_id(trans))
3628 return rule;
3629 }
3630 return ERR_PTR(-ENOENT);
3631}
3632
7dab8ee3
PNA		 3633static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3634 const struct nlattr * const nla[])
96518518 3635{
7dab8ee3 3636 struct netlink_ext_ack *extack = info->extack;
7dab8ee3 3637 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 3638 u8 family = info->nfmsg->nfgen_family;
cf9dc09d 3639 struct nft_chain *chain = NULL;
7dab8ee3
PNA		 3640 struct net *net = info->net;
3641 struct nft_table *table;
cf9dc09d 3642 struct nft_rule *rule;
0628b123 3643 struct nft_ctx ctx;
ef4b65e5 3644 int err = 0;
96518518 3645
6001a930
PNA		 3646 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3647 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 3648 if (IS_ERR(table)) {
3649 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
96518518 3650 return PTR_ERR(table);
36dd1bcc 3651 }
96518518 3652
cf9dc09d 3653 if (nla[NFTA_RULE_CHAIN]) {
f102d66b
FW		 3654 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3655 genmask);
36dd1bcc
PNA		 3656 if (IS_ERR(chain)) {
3657 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
cf9dc09d 3658 return PTR_ERR(chain);
36dd1bcc 3659 }
d0e2c7de
PNA		 3660 if (nft_chain_is_bound(chain))
3661 return -EOPNOTSUPP;
cf9dc09d 3662 }
96518518 3663
7dab8ee3 3664 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
0628b123 3665
cf9dc09d
PNA		 3666 if (chain) {
3667 if (nla[NFTA_RULE_HANDLE]) {
cac20fcd 3668 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
36dd1bcc
PNA		 3669 if (IS_ERR(rule)) {
3670 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
cf9dc09d 3671 return PTR_ERR(rule);
36dd1bcc 3672 }
96518518 3673
1a94e38d
PNA		 3674 err = nft_delrule(&ctx, rule);
3675 } else if (nla[NFTA_RULE_ID]) {
36d5b291 3676 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
36dd1bcc
PNA		 3677 if (IS_ERR(rule)) {
3678 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
1a94e38d 3679 return PTR_ERR(rule);
36dd1bcc 3680 }
1a94e38d 3681
5e266fe7 3682 err = nft_delrule(&ctx, rule);
cf9dc09d 3683 } else {
ce24b721 3684 err = nft_delrule_by_chain(&ctx);
cf9dc09d
PNA		 3685 }
3686 } else {
3687 list_for_each_entry(chain, &table->chains, list) {
664b0f8c
PNA		 3688 if (!nft_is_active_next(net, chain))
3689 continue;
3690
cf9dc09d 3691 ctx.chain = chain;
ce24b721 3692 err = nft_delrule_by_chain(&ctx);
0628b123
PNA		 3693 if (err < 0)
3694 break;
3695 }
3696 }
3697
3698 return err;
3699}
3700
20a69341
PM		 3701/*
3702 * Sets
3703 */
e32a4dc6
FW		 3704static const struct nft_set_type *nft_set_types[] = {
3705 &nft_set_hash_fast_type,
3706 &nft_set_hash_type,
3707 &nft_set_rhash_type,
3708 &nft_set_bitmap_type,
3709 &nft_set_rbtree_type,
e6abef61 3710#if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
7400b063
SB		 3711 &nft_set_pipapo_avx2_type,
3712#endif
e32a4dc6
FW		 3713 &nft_set_pipapo_type,
3714};
20a69341 3715
2b664957 3716#define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
71cc0873
PS		 3717 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3718 NFT_SET_EVAL)
2b664957 3719
71cc0873 3720static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
2b664957 3721{
71cc0873 3722 return (flags & type->features) == (flags & NFT_SET_FEATURES);
2b664957
PNA		 3723}
3724
c50b960c
PM		 3725/*
3726 * Select a set implementation based on the data characteristics and the
3727 * given policy. The total memory use might not be known if no size is
3728 * given, in that case the amount of memory per element is used.
3729 */
3730static const struct nft_set_ops *
2b664957
PNA		 3731nft_select_set_ops(const struct nft_ctx *ctx,
3732 const struct nlattr * const nla[],
c50b960c
PM		 3733 const struct nft_set_desc *desc,
3734 enum nft_set_policies policy)
20a69341 3735{
d59d2f82 3736 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
c50b960c
PM		 3737 const struct nft_set_ops *ops, *bops;
3738 struct nft_set_estimate est, best;
2b664957
PNA		 3739 const struct nft_set_type *type;
3740 u32 flags = 0;
e32a4dc6 3741 int i;
20a69341 3742
0854db2a 3743 lockdep_assert_held(&nft_net->commit_mutex);
f102d66b 3744 lockdep_nfnl_nft_mutex_not_held();
e32a4dc6 3745
2b664957
PNA		 3746 if (nla[NFTA_SET_FLAGS] != NULL)
3747 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
20a69341 3748
55af753c
PNA		 3749 bops = NULL;
3750 best.size = ~0;
3751 best.lookup = ~0;
0b5a7874 3752 best.space = ~0;
c50b960c 3753
e32a4dc6
FW		 3754 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
3755 type = nft_set_types[i];
71cc0873 3756 ops = &type->ops;
2b664957 3757
71cc0873 3758 if (!nft_set_ops_candidate(type, flags))
20a69341 3759 continue;
2b664957 3760 if (!ops->estimate(desc, flags, &est))
c50b960c
PM		 3761 continue;
3762
3763 switch (policy) {
3764 case NFT_SET_POL_PERFORMANCE:
55af753c 3765 if (est.lookup < best.lookup)
c50b960c 3766 break;
644e334e
PNA		 3767 if (est.lookup == best.lookup &&
3768 est.space < best.space)
3769 break;
c50b960c
PM		 3770 continue;
3771 case NFT_SET_POL_MEMORY:
0b5a7874
PNA		 3772 if (!desc->size) {
3773 if (est.space < best.space)
3774 break;
3775 if (est.space == best.space &&
3776 est.lookup < best.lookup)
3777 break;
4f2921ca 3778 } else if (est.size < best.size || !bops) {
c50b960c 3779 break;
0b5a7874 3780 }
c50b960c
PM		 3781 continue;
3782 default:
3783 break;
3784 }
3785
c50b960c
PM		 3786 bops = ops;
3787 best = est;
20a69341
PM		 3788 }
3789
c50b960c
PM		 3790 if (bops != NULL)
3791 return bops;
3792
20a69341
PM		 3793 return ERR_PTR(-EOPNOTSUPP);
3794}
3795
3796static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
b2fbd044
LZ		 3797 [NFTA_SET_TABLE] = { .type = NLA_STRING,
3798 .len = NFT_TABLE_MAXNAMELEN - 1 },
a9bdd836 3799 [NFTA_SET_NAME] = { .type = NLA_STRING,
cb39ad8b 3800 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341
PM		 3801 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
3802 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
3803 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
3804 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
3805 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
c50b960c
PM		 3806 [NFTA_SET_POLICY] = { .type = NLA_U32 },
3807 [NFTA_SET_DESC] = { .type = NLA_NESTED },
958bee14 3808 [NFTA_SET_ID] = { .type = NLA_U32 },
761da293
PM		 3809 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
3810 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
e6d8ecac
CFG		 3811 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
3812 .len = NFT_USERDATA_MAXLEN },
8aeff920 3813 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3ecbfd65 3814 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
65038428 3815 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
48b0ae04 3816 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
c50b960c
PM		 3817};
3818
3819static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
3820 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
f3a2181e 3821 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
20a69341
PM		 3822};
3823
cac20fcd
PNA		 3824static struct nft_set *nft_set_lookup(const struct nft_table *table,
3825 const struct nlattr *nla, u8 genmask)
20a69341
PM		 3826{
3827 struct nft_set *set;
3828
3829 if (nla == NULL)
3830 return ERR_PTR(-EINVAL);
3831
d9adf22a 3832 list_for_each_entry_rcu(set, &table->sets, list) {
37a9cc52
PNA		 3833 if (!nla_strcmp(nla, set->name) &&
3834 nft_active_genmask(set, genmask))
20a69341
PM		 3835 return set;
3836 }
3837 return ERR_PTR(-ENOENT);
3838}
3839
cac20fcd
PNA		 3840static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
3841 const struct nlattr *nla,
3842 u8 genmask)
3ecbfd65
HS		 3843{
3844 struct nft_set *set;
3845
3ecbfd65
HS		 3846 list_for_each_entry(set, &table->sets, list) {
3847 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
3848 nft_active_genmask(set, genmask))
3849 return set;
3850 }
3851 return ERR_PTR(-ENOENT);
3852}
3853
cac20fcd 3854static struct nft_set *nft_set_lookup_byid(const struct net *net,
470ee20e 3855 const struct nft_table *table,
cac20fcd 3856 const struct nlattr *nla, u8 genmask)
958bee14 3857{
d59d2f82 3858 struct nftables_pernet *nft_net = nft_pernet(net);
958bee14 3859 u32 id = ntohl(nla_get_be32(nla));
d59d2f82 3860 struct nft_trans *trans;
958bee14 3861
0854db2a 3862 list_for_each_entry(trans, &nft_net->commit_list, list) {
9c7f96fd
AK		 3863 if (trans->msg_type == NFT_MSG_NEWSET) {
3864 struct nft_set *set = nft_trans_set(trans);
37a9cc52 3865
9c7f96fd 3866 if (id == nft_trans_set_id(trans) &&
470ee20e 3867 set->table == table &&
9c7f96fd
AK		 3868 nft_active_genmask(set, genmask))
3869 return set;
3870 }
958bee14
PNA		 3871 }
3872 return ERR_PTR(-ENOENT);
3873}
c7a72e3f 3874
10659cba
PNA		 3875struct nft_set *nft_set_lookup_global(const struct net *net,
3876 const struct nft_table *table,
3877 const struct nlattr *nla_set_name,
3878 const struct nlattr *nla_set_id,
3879 u8 genmask)
c7a72e3f
PNA		 3880{
3881 struct nft_set *set;
3882
cac20fcd 3883 set = nft_set_lookup(table, nla_set_name, genmask);
c7a72e3f
PNA		 3884 if (IS_ERR(set)) {
3885 if (!nla_set_id)
3886 return set;
3887
470ee20e 3888 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
c7a72e3f
PNA		 3889 }
3890 return set;
3891}
10659cba 3892EXPORT_SYMBOL_GPL(nft_set_lookup_global);
958bee14 3893
20a69341
PM		 3894static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
3895 const char *name)
3896{
3897 const struct nft_set *i;
3898 const char *p;
3899 unsigned long *inuse;
60eb1894 3900 unsigned int n = 0, min = 0;
20a69341 3901
38745490 3902 p = strchr(name, '%');
20a69341
PM		 3903 if (p != NULL) {
3904 if (p[1] != 'd' || strchr(p + 2, '%'))
3905 return -EINVAL;
3906
3907 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
3908 if (inuse == NULL)
3909 return -ENOMEM;
60eb1894 3910cont:
20a69341 3911 list_for_each_entry(i, &ctx->table->sets, list) {
14662917
DB		 3912 int tmp;
3913
271c5ca8 3914 if (!nft_is_active_next(ctx->net, i))
37a9cc52 3915 continue;
14662917 3916 if (!sscanf(i->name, name, &tmp))
20a69341 3917 continue;
60eb1894 3918 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
20a69341 3919 continue;
14662917 3920
60eb1894 3921 set_bit(tmp - min, inuse);
20a69341
PM		 3922 }
3923
53b70287 3924 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
60eb1894
PM		 3925 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
3926 min += BITS_PER_BYTE * PAGE_SIZE;
3927 memset(inuse, 0, PAGE_SIZE);
3928 goto cont;
3929 }
20a69341
PM		 3930 free_page((unsigned long)inuse);
3931 }
3932
33758c89 3933 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
38745490
PS		 3934 if (!set->name)
3935 return -ENOMEM;
3936
20a69341 3937 list_for_each_entry(i, &ctx->table->sets, list) {
37a9cc52
PNA		 3938 if (!nft_is_active_next(ctx->net, i))
3939 continue;
e63aaaa6
AY		 3940 if (!strcmp(set->name, i->name)) {
3941 kfree(set->name);
7fb6f78d 3942 set->name = NULL;
20a69341 3943 return -ENFILE;
e63aaaa6 3944 }
20a69341
PM		 3945 }
3946 return 0;
3947}
3948
917d80d3 3949int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
8e1102d5
FW		 3950{
3951 u64 ms = be64_to_cpu(nla_get_be64(nla));
3952 u64 max = (u64)(~((u64)0));
3953
3954 max = div_u64(max, NSEC_PER_MSEC);
3955 if (ms >= max)
3956 return -ERANGE;
3957
3958 ms *= NSEC_PER_MSEC;
3959 *result = nsecs_to_jiffies64(ms);
3960 return 0;
3961}
3962
917d80d3 3963__be64 nf_jiffies64_to_msecs(u64 input)
8e1102d5 3964{
3b15d09f 3965 return cpu_to_be64(jiffies64_to_msecs(input));
8e1102d5
FW		 3966}
3967
f3a2181e
SB		 3968static int nf_tables_fill_set_concat(struct sk_buff *skb,
3969 const struct nft_set *set)
3970{
3971 struct nlattr *concat, *field;
3972 int i;
3973
3974 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
3975 if (!concat)
3976 return -ENOMEM;
3977
3978 for (i = 0; i < set->field_count; i++) {
3979 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
3980 if (!field)
3981 return -ENOMEM;
3982
3983 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
3984 htonl(set->field_len[i])))
3985 return -ENOMEM;
3986
3987 nla_nest_end(skb, field);
3988 }
3989
3990 nla_nest_end(skb, concat);
3991
3992 return 0;
3993}
3994
20a69341
PM		 3995static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
3996 const struct nft_set *set, u16 event, u16 flags)
3997{
20a69341 3998 struct nlmsghdr *nlh;
128ad332 3999 u32 portid = ctx->portid;
65038428 4000 struct nlattr *nest;
128ad332 4001 u32 seq = ctx->seq;
48b0ae04 4002 int i;
20a69341 4003
dedb67c4 4004 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 4005 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4006 NFNETLINK_V0, nft_base_seq(ctx->net));
4007 if (!nlh)
20a69341
PM		 4008 goto nla_put_failure;
4009
20a69341
PM		 4010 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4011 goto nla_put_failure;
4012 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4013 goto nla_put_failure;
3ecbfd65
HS		 4014 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4015 NFTA_SET_PAD))
4016 goto nla_put_failure;
20a69341
PM		 4017 if (set->flags != 0)
4018 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4019 goto nla_put_failure;
4020
4021 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4022 goto nla_put_failure;
4023 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4024 goto nla_put_failure;
4025 if (set->flags & NFT_SET_MAP) {
4026 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4027 goto nla_put_failure;
4028 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4029 goto nla_put_failure;
4030 }
8aeff920
PNA		 4031 if (set->flags & NFT_SET_OBJECT &&
4032 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4033 goto nla_put_failure;
20a69341 4034
761da293 4035 if (set->timeout &&
d3e2a111 4036 nla_put_be64(skb, NFTA_SET_TIMEOUT,
8e1102d5 4037 nf_jiffies64_to_msecs(set->timeout),
b46f6ded 4038 NFTA_SET_PAD))
761da293
PM		 4039 goto nla_put_failure;
4040 if (set->gc_int &&
4041 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int)))
4042 goto nla_put_failure;
4043
9363dc4b
AB		 4044 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4045 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4046 goto nla_put_failure;
4047 }
4048
6f03bf43
PNA		 4049 if (set->udata &&
4050 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
e6d8ecac
CFG		 4051 goto nla_put_failure;
4052
65038428
PNA		 4053 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4054 if (!nest)
c50b960c
PM		 4055 goto nla_put_failure;
4056 if (set->size &&
4057 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4058 goto nla_put_failure;
f3a2181e
SB		 4059
4060 if (set->field_count > 1 &&
4061 nf_tables_fill_set_concat(skb, set))
4062 goto nla_put_failure;
4063
65038428
PNA		 4064 nla_nest_end(skb, nest);
4065
8cfd9b0f 4066 if (set->num_exprs == 1) {
65038428 4067 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
8cfd9b0f 4068 if (nf_tables_fill_expr_info(skb, set->exprs[0]) < 0)
65038428
PNA		 4069 goto nla_put_failure;
4070
4071 nla_nest_end(skb, nest);
48b0ae04
PNA		 4072 } else if (set->num_exprs > 1) {
4073 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4074 if (nest == NULL)
65038428
PNA		 4075 goto nla_put_failure;
4076
48b0ae04
PNA		 4077 for (i = 0; i < set->num_exprs; i++) {
4078 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
4079 set->exprs[i]) < 0)
4080 goto nla_put_failure;
4081 }
65038428
PNA		 4082 nla_nest_end(skb, nest);
4083 }
c50b960c 4084
053c095a
JB		 4085 nlmsg_end(skb, nlh);
4086 return 0;
20a69341
PM		 4087
4088nla_put_failure:
4089 nlmsg_trim(skb, nlh);
4090 return -1;
4091}
4092
25e94a99
PNA		 4093static void nf_tables_set_notify(const struct nft_ctx *ctx,
4094 const struct nft_set *set, int event,
4095 gfp_t gfp_flags)
20a69341 4096{
d59d2f82 4097 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
128ad332 4098 u32 portid = ctx->portid;
6fb721cf
PNA		 4099 struct sk_buff *skb;
4100 u16 flags = 0;
20a69341
PM		 4101 int err;
4102
128ad332
PNA		 4103 if (!ctx->report &&
4104 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
25e94a99 4105 return;
20a69341 4106
31f8441c 4107 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
20a69341
PM		 4108 if (skb == NULL)
4109 goto err;
4110
6fb721cf
PNA		 4111 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4112 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4113
4114 err = nf_tables_fill_set(skb, ctx, set, event, flags);
20a69341
PM		 4115 if (err < 0) {
4116 kfree_skb(skb);
4117 goto err;
4118 }
4119
0854db2a 4120 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 4121 return;
20a69341 4122err:
25e94a99 4123 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
20a69341
PM		 4124}
4125
5b96af77 4126static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
c9c8e485
PNA		 4127{
4128 const struct nft_set *set;
4129 unsigned int idx, s_idx = cb->args[0];
c9c8e485
PNA		 4130 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4131 struct net *net = sock_net(skb->sk);
5b96af77 4132 struct nft_ctx *ctx = cb->data, ctx_set;
0854db2a 4133 struct nftables_pernet *nft_net;
c9c8e485
PNA		 4134
4135 if (cb->args[1])
4136 return skb->len;
4137
e688a7f8 4138 rcu_read_lock();
d59d2f82 4139 nft_net = nft_pernet(net);
34002783 4140 cb->seq = READ_ONCE(nft_net->base_seq);
38e029f1 4141
0854db2a 4142 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 4143 if (ctx->family != NFPROTO_UNSPEC &&
98319cb9 4144 ctx->family != table->family)
36596dad
PNA		 4145 continue;
4146
4147 if (ctx->table && ctx->table != table)
5b96af77
PNA		 4148 continue;
4149
36596dad
PNA		 4150 if (cur_table) {
4151 if (cur_table != table)
c9c8e485
PNA		 4152 continue;
4153
36596dad 4154 cur_table = NULL;
c9c8e485 4155 }
36596dad
PNA		 4156 idx = 0;
4157 list_for_each_entry_rcu(set, &table->sets, list) {
4158 if (idx < s_idx)
4159 goto cont;
4160 if (!nft_is_active(net, set))
4161 goto cont;
5b96af77 4162
36596dad
PNA		 4163 ctx_set = *ctx;
4164 ctx_set.table = table;
98319cb9 4165 ctx_set.family = table->family;
c9c8e485 4166
36596dad
PNA		 4167 if (nf_tables_fill_set(skb, &ctx_set, set,
4168 NFT_MSG_NEWSET,
4169 NLM_F_MULTI) < 0) {
4170 cb->args[0] = idx;
4171 cb->args[2] = (unsigned long) table;
4172 goto done;
c9c8e485 4173 }
36596dad 4174 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
c9c8e485 4175cont:
36596dad 4176 idx++;
c9c8e485 4177 }
36596dad
PNA		 4178 if (s_idx)
4179 s_idx = 0;
c9c8e485
PNA		 4180 }
4181 cb->args[1] = 1;
4182done:
e688a7f8 4183 rcu_read_unlock();
c9c8e485
PNA		 4184 return skb->len;
4185}
4186
90fd131a
FW		 4187static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4188{
4189 struct nft_ctx *ctx_dump = NULL;
4190
4191 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4192 if (ctx_dump == NULL)
4193 return -ENOMEM;
4194
4195 cb->data = ctx_dump;
4196 return 0;
4197}
4198
5b96af77 4199static int nf_tables_dump_sets_done(struct netlink_callback *cb)
20a69341 4200{
5b96af77
PNA		 4201 kfree(cb->data);
4202 return 0;
20a69341
PM		 4203}
4204
d9adf22a 4205/* called with rcu_read_lock held */
797d4980
PNA		 4206static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4207 const struct nlattr * const nla[])
20a69341 4208{
797d4980
PNA		 4209 struct netlink_ext_ack *extack = info->extack;
4210 u8 genmask = nft_genmask_cur(info->net);
67086651
PNA		 4211 u8 family = info->nfmsg->nfgen_family;
4212 struct nft_table *table = NULL;
797d4980 4213 struct net *net = info->net;
20a69341 4214 const struct nft_set *set;
20a69341 4215 struct sk_buff *skb2;
797d4980 4216 struct nft_ctx ctx;
20a69341
PM		 4217 int err;
4218
67086651
PNA		 4219 if (nla[NFTA_SET_TABLE]) {
4220 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4221 genmask, 0);
4222 if (IS_ERR(table)) {
4223 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4224 return PTR_ERR(table);
4225 }
4226 }
4227
4228 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4229
797d4980 4230 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
20a69341 4231 struct netlink_dump_control c = {
90fd131a 4232 .start = nf_tables_dump_sets_start,
20a69341 4233 .dump = nf_tables_dump_sets,
5b96af77 4234 .done = nf_tables_dump_sets_done,
90fd131a 4235 .data = &ctx,
d9adf22a 4236 .module = THIS_MODULE,
20a69341 4237 };
5b96af77 4238
797d4980 4239 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
20a69341
PM		 4240 }
4241
c9c8e485 4242 /* Only accept unspec with dump */
ef4b65e5 4243 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
c9c8e485 4244 return -EAFNOSUPPORT;
eaa2bcd6
PT		 4245 if (!nla[NFTA_SET_TABLE])
4246 return -EINVAL;
c9c8e485 4247
67086651 4248 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341
PM		 4249 if (IS_ERR(set))
4250 return PTR_ERR(set);
4251
d9adf22a 4252 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
20a69341
PM		 4253 if (skb2 == NULL)
4254 return -ENOMEM;
4255
4256 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4257 if (err < 0)
ee921183 4258 goto err_fill_set_info;
20a69341 4259
ee921183 4260 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
20a69341 4261
ee921183 4262err_fill_set_info:
20a69341
PM		 4263 kfree_skb(skb2);
4264 return err;
4265}
4266
f3a2181e
SB		 4267static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4268 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4269};
4270
4271static int nft_set_desc_concat_parse(const struct nlattr *attr,
4272 struct nft_set_desc *desc)
4273{
4274 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4275 u32 len;
4276 int err;
4277
fecf31ee
PNA		 4278 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4279 return -E2BIG;
4280
f3a2181e
SB		 4281 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4282 nft_concat_policy, NULL);
4283 if (err < 0)
4284 return err;
4285
4286 if (!tb[NFTA_SET_FIELD_LEN])
4287 return -EINVAL;
4288
4289 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
fecf31ee
PNA		 4290 if (!len || len > U8_MAX)
4291 return -EINVAL;
f3a2181e
SB		 4292
4293 desc->field_len[desc->field_count++] = len;
4294
4295 return 0;
4296}
4297
4298static int nft_set_desc_concat(struct nft_set_desc *desc,
4299 const struct nlattr *nla)
4300{
4301 struct nlattr *attr;
fecf31ee
PNA		 4302 u32 num_regs = 0;
4303 int rem, err, i;
f3a2181e
SB		 4304
4305 nla_for_each_nested(attr, nla, rem) {
4306 if (nla_type(attr) != NFTA_LIST_ELEM)
4307 return -EINVAL;
4308
4309 err = nft_set_desc_concat_parse(attr, desc);
4310 if (err < 0)
4311 return err;
4312 }
4313
fecf31ee
PNA		 4314 for (i = 0; i < desc->field_count; i++)
4315 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4316
4317 if (num_regs > NFT_REG32_COUNT)
4318 return -E2BIG;
4319
f3a2181e
SB		 4320 return 0;
4321}
4322
f7e840ee 4323static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
c50b960c
PM		 4324 const struct nlattr *nla)
4325{
4326 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4327 int err;
4328
8cb08174
JB		 4329 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4330 nft_set_desc_policy, NULL);
c50b960c
PM		 4331 if (err < 0)
4332 return err;
4333
4334 if (da[NFTA_SET_DESC_SIZE] != NULL)
4335 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
f3a2181e
SB		 4336 if (da[NFTA_SET_DESC_CONCAT])
4337 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
c50b960c 4338
f3a2181e 4339 return err;
c50b960c
PM		 4340}
4341
7dab8ee3
PNA		 4342static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4343 const struct nlattr * const nla[])
20a69341 4344{
7dab8ee3
PNA		 4345 u32 ktype, dtype, flags, policy, gc_int, objtype;
4346 struct netlink_ext_ack *extack = info->extack;
4347 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 4348 u8 family = info->nfmsg->nfgen_family;
20a69341 4349 const struct nft_set_ops *ops;
65038428 4350 struct nft_expr *expr = NULL;
7dab8ee3
PNA		 4351 struct net *net = info->net;
4352 struct nft_set_desc desc;
20a69341 4353 struct nft_table *table;
7dab8ee3 4354 unsigned char *udata;
20a69341
PM		 4355 struct nft_set *set;
4356 struct nft_ctx ctx;
6c8774a9 4357 size_t alloc_size;
761da293 4358 u64 timeout;
7dab8ee3
PNA		 4359 char *name;
4360 int err, i;
e6d8ecac 4361 u16 udlen;
7dab8ee3 4362 u64 size;
20a69341
PM		 4363
4364 if (nla[NFTA_SET_TABLE] == NULL ||
4365 nla[NFTA_SET_NAME] == NULL ||
958bee14
PNA		 4366 nla[NFTA_SET_KEY_LEN] == NULL ||
4367 nla[NFTA_SET_ID] == NULL)
20a69341
PM		 4368 return -EINVAL;
4369
c50b960c
PM		 4370 memset(&desc, 0, sizeof(desc));
4371
20a69341
PM		 4372 ktype = NFT_DATA_VALUE;
4373 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
4374 ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4375 if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
4376 return -EINVAL;
4377 }
4378
c50b960c 4379 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
7d740264 4380 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4381 return -EINVAL;
4382
4383 flags = 0;
4384 if (nla[NFTA_SET_FLAGS] != NULL) {
4385 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4386 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
7c6c6e95 4387 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
8aeff920 4388 NFT_SET_MAP | NFT_SET_EVAL |
b4e70d8d 4389 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
d9583cdf 4390 return -EOPNOTSUPP;
8aeff920 4391 /* Only one of these operations is supported */
acab7131
FW		 4392 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4393 (NFT_SET_MAP | NFT_SET_OBJECT))
4394 return -EOPNOTSUPP;
4395 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4396 (NFT_SET_EVAL | NFT_SET_OBJECT))
7c6c6e95 4397 return -EOPNOTSUPP;
20a69341
PM		 4398 }
4399
4400 dtype = 0;
20a69341
PM		 4401 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4402 if (!(flags & NFT_SET_MAP))
4403 return -EINVAL;
4404
4405 dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4406 if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4407 dtype != NFT_DATA_VERDICT)
4408 return -EINVAL;
4409
4410 if (dtype != NFT_DATA_VERDICT) {
4411 if (nla[NFTA_SET_DATA_LEN] == NULL)
4412 return -EINVAL;
c50b960c 4413 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
7d740264 4414 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
20a69341
PM		 4415 return -EINVAL;
4416 } else
7d740264 4417 desc.dlen = sizeof(struct nft_verdict);
20a69341
PM		 4418 } else if (flags & NFT_SET_MAP)
4419 return -EINVAL;
4420
8aeff920
PNA		 4421 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4422 if (!(flags & NFT_SET_OBJECT))
4423 return -EINVAL;
4424
4425 objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4426 if (objtype == NFT_OBJECT_UNSPEC ||
4427 objtype > NFT_OBJECT_MAX)
d9583cdf 4428 return -EOPNOTSUPP;
8aeff920
PNA		 4429 } else if (flags & NFT_SET_OBJECT)
4430 return -EINVAL;
4431 else
4432 objtype = NFT_OBJECT_UNSPEC;
4433
761da293
PM		 4434 timeout = 0;
4435 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4436 if (!(flags & NFT_SET_TIMEOUT))
4437 return -EINVAL;
8e1102d5
FW		 4438
4439 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &timeout);
4440 if (err)
4441 return err;
761da293
PM		 4442 }
4443 gc_int = 0;
4444 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4445 if (!(flags & NFT_SET_TIMEOUT))
4446 return -EINVAL;
4447 gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
4448 }
4449
c50b960c
PM		 4450 policy = NFT_SET_POL_PERFORMANCE;
4451 if (nla[NFTA_SET_POLICY] != NULL)
4452 policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
4453
4454 if (nla[NFTA_SET_DESC] != NULL) {
f7e840ee 4455 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
c50b960c
PM		 4456 if (err < 0)
4457 return err;
1b6345d4
PNA		 4458
4459 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
4460 return -EINVAL;
4461 } else if (flags & NFT_SET_CONCAT) {
4462 return -EINVAL;
c50b960c
PM		 4463 }
4464
48b0ae04 4465 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
d56aab26
PNA		 4466 desc.expr = true;
4467
6001a930
PNA		 4468 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4469 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 4470 if (IS_ERR(table)) {
4471 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
20a69341 4472 return PTR_ERR(table);
36dd1bcc 4473 }
20a69341 4474
7dab8ee3 4475 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
20a69341 4476
cac20fcd 4477 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
20a69341 4478 if (IS_ERR(set)) {
36dd1bcc
PNA		 4479 if (PTR_ERR(set) != -ENOENT) {
4480 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4481 return PTR_ERR(set);
36dd1bcc 4482 }
1a28ad74 4483 } else {
7dab8ee3 4484 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 4485 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
20a69341 4486 return -EEXIST;
36dd1bcc 4487 }
7dab8ee3 4488 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
20a69341 4489 return -EOPNOTSUPP;
36dd1bcc 4490
20a69341
PM		 4491 return 0;
4492 }
4493
7dab8ee3 4494 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
20a69341
PM		 4495 return -ENOENT;
4496
2b664957 4497 ops = nft_select_set_ops(&ctx, nla, &desc, policy);
20a69341
PM		 4498 if (IS_ERR(ops))
4499 return PTR_ERR(ops);
4500
e6d8ecac
CFG		 4501 udlen = 0;
4502 if (nla[NFTA_SET_USERDATA])
4503 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4504
20a69341
PM		 4505 size = 0;
4506 if (ops->privsize != NULL)
347b408d 4507 size = ops->privsize(nla, &desc);
6c8774a9 4508 alloc_size = sizeof(*set) + size + udlen;
45928afe 4509 if (alloc_size < size || alloc_size > INT_MAX)
6c8774a9 4510 return -ENOMEM;
33758c89 4511 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
24d19826
FW		 4512 if (!set)
4513 return -ENOMEM;
20a69341 4514
33758c89 4515 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
38745490
PS		 4516 if (!name) {
4517 err = -ENOMEM;
65038428 4518 goto err_set_name;
38745490
PS		 4519 }
4520
20a69341 4521 err = nf_tables_set_alloc_name(&ctx, set, name);
38745490 4522 kfree(name);
20a69341 4523 if (err < 0)
ad9f151e
PNA		 4524 goto err_set_name;
4525
4526 udata = NULL;
4527 if (udlen) {
4528 udata = set->data + size;
4529 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
4530 }
4531
4532 INIT_LIST_HEAD(&set->bindings);
4533 INIT_LIST_HEAD(&set->catchall_list);
4534 set->table = table;
4535 write_pnet(&set->net, net);
4536 set->ops = ops;
4537 set->ktype = ktype;
4538 set->klen = desc.klen;
4539 set->dtype = dtype;
4540 set->objtype = objtype;
4541 set->dlen = desc.dlen;
4542 set->flags = flags;
4543 set->size = desc.size;
4544 set->policy = policy;
4545 set->udlen = udlen;
4546 set->udata = udata;
4547 set->timeout = timeout;
4548 set->gc_int = gc_int;
4549
4550 set->field_count = desc.field_count;
4551 for (i = 0; i < desc.field_count; i++)
4552 set->field_len[i] = desc.field_len[i];
4553
4554 err = ops->init(set, &desc, nla);
4555 if (err < 0)
4556 goto err_set_init;
65038428
PNA		 4557
4558 if (nla[NFTA_SET_EXPR]) {
4559 expr = nft_set_elem_expr_alloc(&ctx, set, nla[NFTA_SET_EXPR]);
4560 if (IS_ERR(expr)) {
4561 err = PTR_ERR(expr);
ad9f151e 4562 goto err_set_expr_alloc;
65038428 4563 }
8cfd9b0f
PNA		 4564 set->exprs[0] = expr;
4565 set->num_exprs++;
48b0ae04
PNA		 4566 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4567 struct nft_expr *expr;
4568 struct nlattr *tmp;
4569 int left;
4570
b4e70d8d
PNA		 4571 if (!(flags & NFT_SET_EXPR)) {
4572 err = -EINVAL;
ad9f151e 4573 goto err_set_expr_alloc;
b4e70d8d 4574 }
48b0ae04
PNA		 4575 i = 0;
4576 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4577 if (i == NFT_SET_EXPR_MAX) {
4578 err = -E2BIG;
ad9f151e 4579 goto err_set_expr_alloc;
48b0ae04
PNA		 4580 }
4581 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4582 err = -EINVAL;
ad9f151e 4583 goto err_set_expr_alloc;
48b0ae04
PNA		 4584 }
4585 expr = nft_set_elem_expr_alloc(&ctx, set, tmp);
4586 if (IS_ERR(expr)) {
4587 err = PTR_ERR(expr);
ad9f151e 4588 goto err_set_expr_alloc;
48b0ae04
PNA		 4589 }
4590 set->exprs[i++] = expr;
4591 set->num_exprs++;
4592 }
65038428 4593 }
20a69341 4594
3ecbfd65 4595 set->handle = nf_tables_alloc_handle(table);
20a69341 4596
958bee14 4597 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
20a69341 4598 if (err < 0)
ad9f151e 4599 goto err_set_expr_alloc;
20a69341 4600
e688a7f8 4601 list_add_tail_rcu(&set->list, &table->sets);
4fefee57 4602 table->use++;
20a69341
PM		 4603 return 0;
4604
ad9f151e 4605err_set_expr_alloc:
8cfd9b0f
PNA		 4606 for (i = 0; i < set->num_exprs; i++)
4607 nft_expr_destroy(&ctx, set->exprs[i]);
ad9f151e
PNA		 4608
4609 ops->destroy(set);
4610err_set_init:
2f6adf48 4611 kfree(set->name);
65038428 4612err_set_name:
1ff75a3e 4613 kvfree(set);
20a69341
PM		 4614 return err;
4615}
4616
aaa31047
PNA		 4617struct nft_set_elem_catchall {
4618 struct list_head list;
4619 struct rcu_head rcu;
4620 void *elem;
4621};
4622
4623static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
4624 struct nft_set *set)
4625{
0f7d9b31 4626 struct nft_set_elem_catchall *next, *catchall;
aaa31047 4627
0f7d9b31 4628 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
aaa31047
PNA		 4629 list_del_rcu(&catchall->list);
4630 nft_set_elem_destroy(set, catchall->elem, true);
ae089831 4631 kfree_rcu(catchall, rcu);
aaa31047
PNA		 4632 }
4633}
4634
0c2a85ed 4635static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
20a69341 4636{
8cfd9b0f
PNA		 4637 int i;
4638
273fe3f1
PNA		 4639 if (WARN_ON(set->use > 0))
4640 return;
4641
8cfd9b0f
PNA		 4642 for (i = 0; i < set->num_exprs; i++)
4643 nft_expr_destroy(ctx, set->exprs[i]);
65038428 4644
20a69341 4645 set->ops->destroy(set);
aaa31047 4646 nft_set_catchall_destroy(ctx, set);
38745490 4647 kfree(set->name);
1ff75a3e 4648 kvfree(set);
20a69341
PM		 4649}
4650
7dab8ee3
PNA		 4651static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
4652 const struct nlattr * const nla[])
20a69341 4653{
7dab8ee3
PNA		 4654 struct netlink_ext_ack *extack = info->extack;
4655 u8 genmask = nft_genmask_next(info->net);
67086651 4656 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 4657 struct net *net = info->net;
36dd1bcc 4658 const struct nlattr *attr;
67086651 4659 struct nft_table *table;
20a69341
PM		 4660 struct nft_set *set;
4661 struct nft_ctx ctx;
20a69341 4662
ef4b65e5 4663 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
ec2c9935 4664 return -EAFNOSUPPORT;
20a69341 4665
67086651
PNA		 4666 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4667 genmask, NETLINK_CB(skb).portid);
4668 if (IS_ERR(table)) {
4669 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4670 return PTR_ERR(table);
4671 }
20a69341 4672
36dd1bcc
PNA		 4673 if (nla[NFTA_SET_HANDLE]) {
4674 attr = nla[NFTA_SET_HANDLE];
67086651 4675 set = nft_set_lookup_byhandle(table, attr, genmask);
36dd1bcc
PNA		 4676 } else {
4677 attr = nla[NFTA_SET_NAME];
67086651 4678 set = nft_set_lookup(table, attr, genmask);
36dd1bcc 4679 }
a8278400 4680
36dd1bcc
PNA		 4681 if (IS_ERR(set)) {
4682 NL_SET_BAD_ATTR(extack, attr);
4683 return PTR_ERR(set);
4684 }
273fe3f1 4685 if (set->use ||
7dab8ee3
PNA		 4686 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
4687 atomic_read(&set->nelems) > 0)) {
36dd1bcc 4688 NL_SET_BAD_ATTR(extack, attr);
20a69341 4689 return -EBUSY;
36dd1bcc 4690 }
20a69341 4691
67086651
PNA		 4692 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4693
ee01d542 4694 return nft_delset(&ctx, set);
20a69341
PM		 4695}
4696
345023b0
PNA		 4697static int nft_validate_register_store(const struct nft_ctx *ctx,
4698 enum nft_registers reg,
4699 const struct nft_data *data,
4700 enum nft_data_types type,
4701 unsigned int len);
4702
97c976d6
PNA		 4703static int nft_setelem_data_validate(const struct nft_ctx *ctx,
4704 struct nft_set *set,
4705 struct nft_set_elem *elem)
20a69341 4706{
fe2811eb 4707 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 4708 enum nft_registers dreg;
4709
4710 dreg = nft_type_to_reg(set->dtype);
1ec10212
PM		 4711 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
4712 set->dtype == NFT_DATA_VERDICT ?
4713 NFT_DATA_VERDICT : NFT_DATA_VALUE,
4714 set->dlen);
20a69341
PM		 4715}
4716
97c976d6
PNA		 4717static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
4718 struct nft_set *set,
4719 const struct nft_set_iter *iter,
4720 struct nft_set_elem *elem)
4721{
4722 return nft_setelem_data_validate(ctx, set, elem);
4723}
4724
aaa31047
PNA		 4725static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
4726 struct nft_set *set)
4727{
4728 u8 genmask = nft_genmask_next(ctx->net);
4729 struct nft_set_elem_catchall *catchall;
4730 struct nft_set_elem elem;
4731 struct nft_set_ext *ext;
4732 int ret = 0;
4733
4734 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
4735 ext = nft_set_elem_ext(set, catchall->elem);
4736 if (!nft_set_elem_active(ext, genmask))
4737 continue;
4738
4739 elem.priv = catchall->elem;
4740 ret = nft_setelem_data_validate(ctx, set, &elem);
4741 if (ret < 0)
4742 break;
4743 }
4744
4745 return ret;
4746}
4747
20a69341
PM		 4748int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
4749 struct nft_set_binding *binding)
4750{
4751 struct nft_set_binding *i;
4752 struct nft_set_iter iter;
4753
273fe3f1
PNA		 4754 if (set->use == UINT_MAX)
4755 return -EOVERFLOW;
4756
408070d6 4757 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
20a69341
PM		 4758 return -EBUSY;
4759
11113e19 4760 if (binding->flags & NFT_SET_MAP) {
20a69341
PM		 4761 /* If the set is already bound to the same chain all
4762 * jumps are already validated for that chain.
4763 */
4764 list_for_each_entry(i, &set->bindings, list) {
a4684402 4765 if (i->flags & NFT_SET_MAP &&
11113e19 4766 i->chain == binding->chain)
20a69341
PM		 4767 goto bind;
4768 }
4769
8588ac09 4770 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 4771 iter.skip = 0;
4772 iter.count = 0;
4773 iter.err = 0;
4774 iter.fn = nf_tables_bind_check_setelem;
4775
4776 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 4777 if (!iter.err)
4778 iter.err = nft_set_catchall_bind_check(ctx, set);
4779
a02f4248 4780 if (iter.err < 0)
20a69341 4781 return iter.err;
20a69341
PM		 4782 }
4783bind:
4784 binding->chain = ctx->chain;
e688a7f8 4785 list_add_tail_rcu(&binding->list, &set->bindings);
f6ac8585 4786 nft_set_trans_bind(ctx, set);
273fe3f1 4787 set->use++;
f6ac8585 4788
20a69341
PM		 4789 return 0;
4790}
63aea290 4791EXPORT_SYMBOL_GPL(nf_tables_bind_set);
20a69341 4792
3b0a081d
FW		 4793static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
4794 struct nft_set_binding *binding, bool event)
20a69341 4795{
e688a7f8 4796 list_del_rcu(&binding->list);
20a69341 4797
f6ac8585 4798 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
cd5125d8 4799 list_del_rcu(&set->list);
f6ac8585
PNA		 4800 if (event)
4801 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
4802 GFP_KERNEL);
4803 }
20a69341
PM		 4804}
4805
273fe3f1
PNA		 4806void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
4807 struct nft_set_binding *binding,
4808 enum nft_trans_phase phase)
4809{
4810 switch (phase) {
4811 case NFT_TRANS_PREPARE:
4812 set->use--;
4813 return;
4814 case NFT_TRANS_ABORT:
4815 case NFT_TRANS_RELEASE:
4816 set->use--;
954d8297 4817 fallthrough;
273fe3f1
PNA		 4818 default:
4819 nf_tables_unbind_set(ctx, set, binding,
4820 phase == NFT_TRANS_COMMIT);
4821 }
4822}
4823EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
4824
cd5125d8
FW		 4825void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
4826{
f6ac8585 4827 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
0c2a85ed 4828 nft_set_destroy(ctx, set);
cd5125d8
FW		 4829}
4830EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
4831
3ac4c07a
PM		 4832const struct nft_set_ext_type nft_set_ext_types[] = {
4833 [NFT_SET_EXT_KEY] = {
7d740264 4834 .align = __alignof__(u32),
3ac4c07a
PM		 4835 },
4836 [NFT_SET_EXT_DATA] = {
7d740264 4837 .align = __alignof__(u32),
3ac4c07a 4838 },
563125a7
PNA		 4839 [NFT_SET_EXT_EXPRESSIONS] = {
4840 .align = __alignof__(struct nft_set_elem_expr),
f25ad2e9 4841 },
8aeff920
PNA		 4842 [NFT_SET_EXT_OBJREF] = {
4843 .len = sizeof(struct nft_object *),
4844 .align = __alignof__(struct nft_object *),
4845 },
3ac4c07a
PM		 4846 [NFT_SET_EXT_FLAGS] = {
4847 .len = sizeof(u8),
4848 .align = __alignof__(u8),
4849 },
c3e1b005
PM		 4850 [NFT_SET_EXT_TIMEOUT] = {
4851 .len = sizeof(u64),
4852 .align = __alignof__(u64),
4853 },
4854 [NFT_SET_EXT_EXPIRATION] = {
8e1102d5
FW		 4855 .len = sizeof(u64),
4856 .align = __alignof__(u64),
c3e1b005 4857 },
68e942e8
PM		 4858 [NFT_SET_EXT_USERDATA] = {
4859 .len = sizeof(struct nft_userdata),
4860 .align = __alignof__(struct nft_userdata),
4861 },
7b225d0b
PNA		 4862 [NFT_SET_EXT_KEY_END] = {
4863 .align = __alignof__(u32),
4864 },
3ac4c07a 4865};
3ac4c07a 4866
20a69341
PM		 4867/*
4868 * Set elements
4869 */
4870
4871static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
4872 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
4873 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
4874 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
c3e1b005 4875 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
79ebb5bb 4876 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
68e942e8
PM		 4877 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
4878 .len = NFT_USERDATA_MAXLEN },
467697d2 4879 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
9332d27d
FW		 4880 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
4881 .len = NFT_OBJ_MAXNAMELEN - 1 },
7b225d0b 4882 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
48b0ae04 4883 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
20a69341
PM		 4884};
4885
4886static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
b2fbd044
LZ		 4887 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
4888 .len = NFT_TABLE_MAXNAMELEN - 1 },
4889 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
4890 .len = NFT_SET_MAXNAMELEN - 1 },
20a69341 4891 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
958bee14 4892 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
20a69341
PM		 4893};
4894
563125a7
PNA		 4895static int nft_set_elem_expr_dump(struct sk_buff *skb,
4896 const struct nft_set *set,
4897 const struct nft_set_ext *ext)
4898{
4899 struct nft_set_elem_expr *elem_expr;
4900 u32 size, num_exprs = 0;
4901 struct nft_expr *expr;
48b0ae04 4902 struct nlattr *nest;
563125a7
PNA		 4903
4904 elem_expr = nft_set_ext_expr(ext);
4905 nft_setelem_expr_foreach(expr, elem_expr, size)
4906 num_exprs++;
4907
4908 if (num_exprs == 1) {
4909 expr = nft_setelem_expr_at(elem_expr, 0);
4910 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr) < 0)
4911 return -1;
4912
4913 return 0;
48b0ae04
PNA		 4914 } else if (num_exprs > 1) {
4915 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
4916 if (nest == NULL)
4917 goto nla_put_failure;
563125a7 4918
48b0ae04
PNA		 4919 nft_setelem_expr_foreach(expr, elem_expr, size) {
4920 expr = nft_setelem_expr_at(elem_expr, size);
4921 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
4922 goto nla_put_failure;
4923 }
4924 nla_nest_end(skb, nest);
4925 }
563125a7 4926 return 0;
48b0ae04
PNA		 4927
4928nla_put_failure:
4929 return -1;
563125a7
PNA		 4930}
4931
20a69341
PM		 4932static int nf_tables_fill_setelem(struct sk_buff *skb,
4933 const struct nft_set *set,
4934 const struct nft_set_elem *elem)
4935{
fe2811eb 4936 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
20a69341
PM		 4937 unsigned char *b = skb_tail_pointer(skb);
4938 struct nlattr *nest;
4939
ae0be8de 4940 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
20a69341
PM		 4941 if (nest == NULL)
4942 goto nla_put_failure;
4943
aaa31047
PNA		 4944 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
4945 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
fe2811eb 4946 NFT_DATA_VALUE, set->klen) < 0)
20a69341
PM		 4947 goto nla_put_failure;
4948
7b225d0b
PNA		 4949 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
4950 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
4951 NFT_DATA_VALUE, set->klen) < 0)
4952 goto nla_put_failure;
4953
fe2811eb
PM		 4954 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
4955 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
20a69341
PM		 4956 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
4957 set->dlen) < 0)
4958 goto nla_put_failure;
4959
563125a7
PNA		 4960 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
4961 nft_set_elem_expr_dump(skb, set, ext))
f25ad2e9
PM		 4962 goto nla_put_failure;
4963
8aeff920
PNA		 4964 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
4965 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
d152159b 4966 (*nft_set_ext_obj(ext))->key.name) < 0)
8aeff920
PNA		 4967 goto nla_put_failure;
4968
fe2811eb
PM		 4969 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
4970 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
4971 htonl(*nft_set_ext_flags(ext))))
4972 goto nla_put_failure;
20a69341 4973
c3e1b005
PM		 4974 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
4975 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
8e1102d5 4976 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
b46f6ded 4977 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 4978 goto nla_put_failure;
4979
4980 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
8e1102d5 4981 u64 expires, now = get_jiffies_64();
c3e1b005
PM		 4982
4983 expires = *nft_set_ext_expiration(ext);
8e1102d5 4984 if (time_before64(now, expires))
c3e1b005
PM		 4985 expires -= now;
4986 else
4987 expires = 0;
4988
4989 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
8e1102d5 4990 nf_jiffies64_to_msecs(expires),
b46f6ded 4991 NFTA_SET_ELEM_PAD))
c3e1b005
PM		 4992 goto nla_put_failure;
4993 }
4994
68e942e8
PM		 4995 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
4996 struct nft_userdata *udata;
4997
4998 udata = nft_set_ext_userdata(ext);
4999 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5000 udata->len + 1, udata->data))
5001 goto nla_put_failure;
5002 }
5003
20a69341
PM		 5004 nla_nest_end(skb, nest);
5005 return 0;
5006
5007nla_put_failure:
5008 nlmsg_trim(skb, b);
5009 return -EMSGSIZE;
5010}
5011
5012struct nft_set_dump_args {
5013 const struct netlink_callback *cb;
5014 struct nft_set_iter iter;
5015 struct sk_buff *skb;
5016};
5017
5018static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
de70185d 5019 struct nft_set *set,
20a69341 5020 const struct nft_set_iter *iter,
de70185d 5021 struct nft_set_elem *elem)
20a69341
PM		 5022{
5023 struct nft_set_dump_args *args;
5024
5025 args = container_of(iter, struct nft_set_dump_args, iter);
5026 return nf_tables_fill_setelem(args->skb, set, elem);
5027}
5028
fa803605
LZ		 5029struct nft_set_dump_ctx {
5030 const struct nft_set *set;
5031 struct nft_ctx ctx;
5032};
5033
aaa31047
PNA		 5034static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5035 const struct nft_set *set)
5036{
5037 struct nft_set_elem_catchall *catchall;
5038 u8 genmask = nft_genmask_cur(net);
5039 struct nft_set_elem elem;
5040 struct nft_set_ext *ext;
5041 int ret = 0;
5042
5043 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5044 ext = nft_set_elem_ext(set, catchall->elem);
5045 if (!nft_set_elem_active(ext, genmask) ||
5046 nft_set_elem_expired(ext))
5047 continue;
5048
5049 elem.priv = catchall->elem;
5050 ret = nf_tables_fill_setelem(skb, set, &elem);
5051 break;
5052 }
5053
5054 return ret;
5055}
5056
20a69341
PM		 5057static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5058{
fa803605 5059 struct nft_set_dump_ctx *dump_ctx = cb->data;
633c9a84 5060 struct net *net = sock_net(skb->sk);
0854db2a 5061 struct nftables_pernet *nft_net;
fa803605 5062 struct nft_table *table;
de70185d 5063 struct nft_set *set;
20a69341 5064 struct nft_set_dump_args args;
fa803605 5065 bool set_found = false;
20a69341
PM		 5066 struct nlmsghdr *nlh;
5067 struct nlattr *nest;
5068 u32 portid, seq;
fa803605 5069 int event;
20a69341 5070
fa803605 5071 rcu_read_lock();
d59d2f82 5072 nft_net = nft_pernet(net);
34002783
PNA		 5073 cb->seq = READ_ONCE(nft_net->base_seq);
5074
0854db2a 5075 list_for_each_entry_rcu(table, &nft_net->tables, list) {
36596dad 5076 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
98319cb9 5077 dump_ctx->ctx.family != table->family)
fa803605 5078 continue;
20a69341 5079
36596dad
PNA		 5080 if (table != dump_ctx->ctx.table)
5081 continue;
20a69341 5082
36596dad
PNA		 5083 list_for_each_entry_rcu(set, &table->sets, list) {
5084 if (set == dump_ctx->set) {
5085 set_found = true;
5086 break;
fa803605 5087 }
fa803605
LZ		 5088 }
5089 break;
5090 }
5091
5092 if (!set_found) {
5093 rcu_read_unlock();
5094 return -ENOENT;
5095 }
20a69341 5096
dedb67c4 5097 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
20a69341
PM		 5098 portid = NETLINK_CB(cb->skb).portid;
5099 seq = cb->nlh->nlmsg_seq;
5100
19c28b13
PNA		 5101 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5102 table->family, NFNETLINK_V0, nft_base_seq(net));
5103 if (!nlh)
20a69341
PM		 5104 goto nla_put_failure;
5105
fa803605 5106 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
20a69341
PM		 5107 goto nla_put_failure;
5108 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5109 goto nla_put_failure;
5110
ae0be8de 5111 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
20a69341
PM		 5112 if (nest == NULL)
5113 goto nla_put_failure;
5114
8588ac09
PNA		 5115 args.cb = cb;
5116 args.skb = skb;
fa803605 5117 args.iter.genmask = nft_genmask_cur(net);
8588ac09
PNA		 5118 args.iter.skip = cb->args[0];
5119 args.iter.count = 0;
5120 args.iter.err = 0;
5121 args.iter.fn = nf_tables_dump_setelem;
fa803605 5122 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
aaa31047
PNA		 5123
5124 if (!args.iter.err && args.iter.count == cb->args[0])
5125 args.iter.err = nft_set_catchall_dump(net, skb, set);
fa803605 5126 rcu_read_unlock();
20a69341
PM		 5127
5128 nla_nest_end(skb, nest);
5129 nlmsg_end(skb, nlh);
5130
5131 if (args.iter.err && args.iter.err != -EMSGSIZE)
5132 return args.iter.err;
5133 if (args.iter.count == cb->args[0])
5134 return 0;
5135
5136 cb->args[0] = args.iter.count;
5137 return skb->len;
5138
5139nla_put_failure:
fa803605 5140 rcu_read_unlock();
20a69341
PM		 5141 return -ENOSPC;
5142}
5143
90fd131a
FW		 5144static int nf_tables_dump_set_start(struct netlink_callback *cb)
5145{
5146 struct nft_set_dump_ctx *dump_ctx = cb->data;
5147
5148 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5149
5150 return cb->data ? 0 : -ENOMEM;
5151}
5152
fa803605
LZ		 5153static int nf_tables_dump_set_done(struct netlink_callback *cb)
5154{
5155 kfree(cb->data);
5156 return 0;
5157}
5158
d60ce62f
AB		 5159static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5160 const struct nft_ctx *ctx, u32 seq,
5161 u32 portid, int event, u16 flags,
5162 const struct nft_set *set,
5163 const struct nft_set_elem *elem)
5164{
d60ce62f
AB		 5165 struct nlmsghdr *nlh;
5166 struct nlattr *nest;
5167 int err;
5168
dedb67c4 5169 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 5170 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5171 NFNETLINK_V0, nft_base_seq(ctx->net));
5172 if (!nlh)
d60ce62f
AB		 5173 goto nla_put_failure;
5174
d60ce62f
AB		 5175 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5176 goto nla_put_failure;
5177 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5178 goto nla_put_failure;
5179
ae0be8de 5180 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
d60ce62f
AB		 5181 if (nest == NULL)
5182 goto nla_put_failure;
5183
5184 err = nf_tables_fill_setelem(skb, set, elem);
5185 if (err < 0)
5186 goto nla_put_failure;
5187
5188 nla_nest_end(skb, nest);
5189
053c095a
JB		 5190 nlmsg_end(skb, nlh);
5191 return 0;
d60ce62f
AB		 5192
5193nla_put_failure:
5194 nlmsg_trim(skb, nlh);
5195 return -1;
5196}
5197
ba0e4d99
PNA		 5198static int nft_setelem_parse_flags(const struct nft_set *set,
5199 const struct nlattr *attr, u32 *flags)
5200{
5201 if (attr == NULL)
5202 return 0;
5203
5204 *flags = ntohl(nla_get_be32(attr));
aaa31047
PNA		 5205 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5206 return -EOPNOTSUPP;
ba0e4d99
PNA		 5207 if (!(set->flags & NFT_SET_INTERVAL) &&
5208 *flags & NFT_SET_ELEM_INTERVAL_END)
5209 return -EINVAL;
fc0ae524
PNA		 5210 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5211 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5212 return -EINVAL;
ba0e4d99
PNA		 5213
5214 return 0;
5215}
5216
20a1452c
PNA		 5217static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5218 struct nft_data *key, struct nlattr *attr)
5219{
341b6941
PNA		 5220 struct nft_data_desc desc = {
5221 .type = NFT_DATA_VALUE,
5222 .size = NFT_DATA_VALUE_MAXLEN,
5223 .len = set->klen,
5224 };
20a1452c 5225
341b6941 5226 return nft_data_init(ctx, key, &desc, attr);
20a1452c
PNA		 5227}
5228
fdb9c405
PNA		 5229static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5230 struct nft_data_desc *desc,
5231 struct nft_data *data,
5232 struct nlattr *attr)
5233{
7e6bc1f6 5234 u32 dtype;
fdb9c405 5235
7e6bc1f6
PNA		 5236 if (set->dtype == NFT_DATA_VERDICT)
5237 dtype = NFT_DATA_VERDICT;
5238 else
5239 dtype = NFT_DATA_VALUE;
5240
341b6941
PNA		 5241 desc->type = dtype;
5242 desc->size = NFT_DATA_VALUE_MAXLEN;
5243 desc->len = set->dlen;
f323ef3a 5244 desc->flags = NFT_DATA_DESC_SETELEM;
fdb9c405 5245
341b6941 5246 return nft_data_init(ctx, data, desc, attr);
fdb9c405
PNA		 5247}
5248
aaa31047
PNA		 5249static void *nft_setelem_catchall_get(const struct net *net,
5250 const struct nft_set *set)
5251{
5252 struct nft_set_elem_catchall *catchall;
5253 u8 genmask = nft_genmask_cur(net);
5254 struct nft_set_ext *ext;
5255 void *priv = NULL;
5256
5257 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5258 ext = nft_set_elem_ext(set, catchall->elem);
5259 if (!nft_set_elem_active(ext, genmask) ||
5260 nft_set_elem_expired(ext))
5261 continue;
5262
5263 priv = catchall->elem;
5264 break;
5265 }
5266
5267 return priv;
5268}
5269
5270static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5271 struct nft_set_elem *elem, u32 flags)
5272{
5273 void *priv;
5274
5275 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5276 priv = set->ops->get(ctx->net, set, elem, flags);
5277 if (IS_ERR(priv))
5278 return PTR_ERR(priv);
5279 } else {
5280 priv = nft_setelem_catchall_get(ctx->net, set);
5281 if (!priv)
5282 return -ENOENT;
5283 }
5284 elem->priv = priv;
5285
5286 return 0;
5287}
5288
ba0e4d99
PNA		 5289static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5290 const struct nlattr *attr)
5291{
5292 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
ba0e4d99
PNA		 5293 struct nft_set_elem elem;
5294 struct sk_buff *skb;
5295 uint32_t flags = 0;
ba0e4d99
PNA		 5296 int err;
5297
8cb08174
JB		 5298 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5299 nft_set_elem_policy, NULL);
ba0e4d99
PNA		 5300 if (err < 0)
5301 return err;
5302
ba0e4d99
PNA		 5303 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5304 if (err < 0)
5305 return err;
5306
aaa31047
PNA		 5307 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5308 return -EINVAL;
5309
5310 if (nla[NFTA_SET_ELEM_KEY]) {
5311 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5312 nla[NFTA_SET_ELEM_KEY]);
5313 if (err < 0)
5314 return err;
5315 }
ba0e4d99 5316
7b225d0b
PNA		 5317 if (nla[NFTA_SET_ELEM_KEY_END]) {
5318 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5319 nla[NFTA_SET_ELEM_KEY_END]);
5320 if (err < 0)
5321 return err;
5322 }
5323
aaa31047
PNA		 5324 err = nft_setelem_get(ctx, set, &elem, flags);
5325 if (err < 0)
5326 return err;
ba0e4d99
PNA		 5327
5328 err = -ENOMEM;
d9adf22a 5329 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
ba0e4d99 5330 if (skb == NULL)
ee921183 5331 return err;
ba0e4d99
PNA		 5332
5333 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5334 NFT_MSG_NEWSETELEM, 0, set, &elem);
5335 if (err < 0)
ee921183 5336 goto err_fill_setelem;
ba0e4d99 5337
ee921183 5338 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
ba0e4d99 5339
ee921183 5340err_fill_setelem:
ba0e4d99 5341 kfree_skb(skb);
ee921183 5342 return err;
ba0e4d99
PNA		 5343}
5344
d9adf22a 5345/* called with rcu_read_lock held */
797d4980
PNA		 5346static int nf_tables_getsetelem(struct sk_buff *skb,
5347 const struct nfnl_info *info,
5348 const struct nlattr * const nla[])
ba0e4d99 5349{
797d4980
PNA		 5350 struct netlink_ext_ack *extack = info->extack;
5351 u8 genmask = nft_genmask_cur(info->net);
e2b750d7 5352 u8 family = info->nfmsg->nfgen_family;
797d4980 5353 struct net *net = info->net;
e2b750d7 5354 struct nft_table *table;
ba0e4d99
PNA		 5355 struct nft_set *set;
5356 struct nlattr *attr;
5357 struct nft_ctx ctx;
5358 int rem, err = 0;
5359
e2b750d7
PNA		 5360 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
5361 genmask, NETLINK_CB(skb).portid);
5362 if (IS_ERR(table)) {
5363 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5364 return PTR_ERR(table);
5365 }
ba0e4d99 5366
e2b750d7 5367 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
ba0e4d99
PNA		 5368 if (IS_ERR(set))
5369 return PTR_ERR(set);
5370
e2b750d7
PNA		 5371 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5372
797d4980 5373 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
ba0e4d99 5374 struct netlink_dump_control c = {
90fd131a 5375 .start = nf_tables_dump_set_start,
ba0e4d99
PNA		 5376 .dump = nf_tables_dump_set,
5377 .done = nf_tables_dump_set_done,
d9adf22a 5378 .module = THIS_MODULE,
ba0e4d99 5379 };
90fd131a
FW		 5380 struct nft_set_dump_ctx dump_ctx = {
5381 .set = set,
5382 .ctx = ctx,
5383 };
ba0e4d99 5384
90fd131a 5385 c.data = &dump_ctx;
797d4980 5386 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
ba0e4d99
PNA		 5387 }
5388
5389 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5390 return -EINVAL;
5391
5392 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5393 err = nft_get_set_elem(&ctx, set, attr);
b53c1166
PNA		 5394 if (err < 0) {
5395 NL_SET_BAD_ATTR(extack, attr);
ba0e4d99 5396 break;
b53c1166 5397 }
ba0e4d99
PNA		 5398 }
5399
5400 return err;
5401}
5402
25e94a99
PNA		 5403static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5404 const struct nft_set *set,
5405 const struct nft_set_elem *elem,
6fb721cf 5406 int event)
d60ce62f 5407{
0854db2a 5408 struct nftables_pernet *nft_net;
128ad332
PNA		 5409 struct net *net = ctx->net;
5410 u32 portid = ctx->portid;
d60ce62f 5411 struct sk_buff *skb;
6fb721cf 5412 u16 flags = 0;
d60ce62f
AB		 5413 int err;
5414
128ad332 5415 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 5416 return;
d60ce62f 5417
d60ce62f
AB		 5418 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5419 if (skb == NULL)
5420 goto err;
5421
6fb721cf
PNA		 5422 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5423 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5424
d60ce62f
AB		 5425 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5426 set, elem);
5427 if (err < 0) {
5428 kfree_skb(skb);
5429 goto err;
5430 }
5431
d59d2f82 5432 nft_net = nft_pernet(net);
0854db2a 5433 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
25e94a99 5434 return;
d60ce62f 5435err:
25e94a99 5436 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
d60ce62f
AB		 5437}
5438
60319eb1
PNA		 5439static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5440 int msg_type,
5441 struct nft_set *set)
5442{
5443 struct nft_trans *trans;
5444
5445 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5446 if (trans == NULL)
5447 return NULL;
5448
5449 nft_trans_elem_set(trans) = set;
5450 return trans;
5451}
5452
a7fc9368
PNA		 5453struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5454 const struct nft_set *set,
5455 const struct nlattr *attr)
5456{
5457 struct nft_expr *expr;
5458 int err;
5459
5460 expr = nft_expr_init(ctx, attr);
5461 if (IS_ERR(expr))
5462 return expr;
5463
5464 err = -EOPNOTSUPP;
a7fc9368
PNA		 5465 if (expr->ops->type->flags & NFT_EXPR_GC) {
5466 if (set->flags & NFT_SET_TIMEOUT)
5467 goto err_set_elem_expr;
5468 if (!set->ops->gc_init)
5469 goto err_set_elem_expr;
5470 set->ops->gc_init(set);
5471 }
5472
5473 return expr;
5474
5475err_set_elem_expr:
5476 nft_expr_destroy(ctx, expr);
5477 return ERR_PTR(err);
5478}
5479
34aae2c2
PNA		 5480static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
5481{
5482 len += nft_set_ext_types[id].len;
5483 if (len > tmpl->ext_len[id] ||
5484 len > U8_MAX)
5485 return -1;
5486
5487 return 0;
5488}
5489
5490static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
5491 void *to, const void *from, u32 len)
5492{
5493 if (nft_set_ext_check(tmpl, id, len) < 0)
5494 return -1;
5495
5496 memcpy(to, from, len);
5497
5498 return 0;
5499}
5500
22fe54d5
PM		 5501void *nft_set_elem_init(const struct nft_set *set,
5502 const struct nft_set_ext_tmpl *tmpl,
7b225d0b
PNA		 5503 const u32 *key, const u32 *key_end,
5504 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
fe2811eb
PM		 5505{
5506 struct nft_set_ext *ext;
5507 void *elem;
5508
5509 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
5510 if (elem == NULL)
34aae2c2 5511 return ERR_PTR(-ENOMEM);
fe2811eb
PM		 5512
5513 ext = nft_set_elem_ext(set, elem);
5514 nft_set_ext_init(ext, tmpl);
5515
34aae2c2
PNA		 5516 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5517 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
5518 nft_set_ext_key(ext), key, set->klen) < 0)
5519 goto err_ext_check;
5520
5521 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5522 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
5523 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
5524 goto err_ext_check;
5525
5526 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5527 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
5528 nft_set_ext_data(ext), data, set->dlen) < 0)
5529 goto err_ext_check;
5530
79ebb5bb
LGL		 5531 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5532 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
5533 if (expiration == 0)
5534 *nft_set_ext_expiration(ext) += timeout;
5535 }
c3e1b005
PM		 5536 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
5537 *nft_set_ext_timeout(ext) = timeout;
fe2811eb
PM		 5538
5539 return elem;
34aae2c2
PNA		 5540
5541err_ext_check:
5542 kfree(elem);
5543
5544 return ERR_PTR(-EINVAL);
fe2811eb
PM		 5545}
5546
563125a7
PNA		 5547static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5548 struct nft_expr *expr)
475beb9c
PNA		 5549{
5550 if (expr->ops->destroy_clone) {
5551 expr->ops->destroy_clone(ctx, expr);
5552 module_put(expr->ops->type->owner);
5553 } else {
5554 nf_tables_expr_destroy(ctx, expr);
5555 }
5556}
5557
563125a7
PNA		 5558static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5559 struct nft_set_elem_expr *elem_expr)
5560{
5561 struct nft_expr *expr;
5562 u32 size;
5563
5564 nft_setelem_expr_foreach(expr, elem_expr, size)
5565 __nft_set_elem_expr_destroy(ctx, expr);
5566}
5567
61f9e292
LZ		 5568void nft_set_elem_destroy(const struct nft_set *set, void *elem,
5569 bool destroy_expr)
61edafbb
PM		 5570{
5571 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
3453c927
PNA		 5572 struct nft_ctx ctx = {
5573 .net = read_pnet(&set->net),
5574 .family = set->table->family,
5575 };
61edafbb 5576
59105446 5577 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
61edafbb 5578 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
59105446 5579 nft_data_release(nft_set_ext_data(ext), set->dtype);
563125a7 5580 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c 5581 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
371ebcbb 5582
8aeff920
PNA		 5583 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
5584 (*nft_set_ext_obj(ext))->use--;
61edafbb
PM		 5585 kfree(elem);
5586}
5587EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
5588
f8bb7889
PNA		 5589/* Only called from commit path, nft_setelem_data_deactivate() already deals
5590 * with the refcounting from the preparation phase.
59105446 5591 */
3453c927
PNA		 5592static void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
5593 const struct nft_set *set, void *elem)
59105446
PNA		 5594{
5595 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5596
563125a7 5597 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
475beb9c
PNA		 5598 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
5599
59105446
PNA		 5600 kfree(elem);
5601}
5602
fca05d4d
PNA		 5603int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
5604 struct nft_expr *expr_array[])
8cfd9b0f
PNA		 5605{
5606 struct nft_expr *expr;
5607 int err, i, k;
5608
5609 for (i = 0; i < set->num_exprs; i++) {
42193ffd 5610 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
8cfd9b0f
PNA		 5611 if (!expr)
5612 goto err_expr;
5613
5614 err = nft_expr_clone(expr, set->exprs[i]);
5615 if (err < 0) {
c485c35f 5616 kfree(expr);
8cfd9b0f
PNA		 5617 goto err_expr;
5618 }
5619 expr_array[i] = expr;
5620 }
5621
5622 return 0;
5623
5624err_expr:
161b838e
CIK		 5625 for (k = i - 1; k >= 0; k--)
5626 nft_expr_destroy(ctx, expr_array[k]);
8cfd9b0f
PNA		 5627
5628 return -ENOMEM;
5629}
5630
4d8f9065 5631static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
34aae2c2 5632 const struct nft_set_ext_tmpl *tmpl,
4d8f9065
PNA		 5633 const struct nft_set_ext *ext,
5634 struct nft_expr *expr_array[],
5635 u32 num_exprs)
563125a7
PNA		 5636{
5637 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
34aae2c2 5638 u32 len = sizeof(struct nft_set_elem_expr);
4d8f9065
PNA		 5639 struct nft_expr *expr;
5640 int i, err;
5641
34aae2c2
PNA		 5642 if (num_exprs == 0)
5643 return 0;
5644
5645 for (i = 0; i < num_exprs; i++)
5646 len += expr_array[i]->ops->size;
5647
5648 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
5649 return -EINVAL;
5650
4d8f9065
PNA		 5651 for (i = 0; i < num_exprs; i++) {
5652 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
5653 err = nft_expr_clone(expr, expr_array[i]);
5654 if (err < 0)
5655 goto err_elem_expr_setup;
5656
5657 elem_expr->size += expr_array[i]->ops->size;
5658 nft_expr_destroy(ctx, expr_array[i]);
5659 expr_array[i] = NULL;
5660 }
5661
5662 return 0;
5663
5664err_elem_expr_setup:
5665 for (; i < num_exprs; i++) {
5666 nft_expr_destroy(ctx, expr_array[i]);
5667 expr_array[i] = NULL;
5668 }
563125a7 5669
4d8f9065 5670 return -ENOMEM;
563125a7
PNA		 5671}
5672
aaa31047
PNA		 5673struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
5674 const struct nft_set *set)
5675{
5676 struct nft_set_elem_catchall *catchall;
5677 u8 genmask = nft_genmask_cur(net);
5678 struct nft_set_ext *ext;
5679
5680 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5681 ext = nft_set_elem_ext(set, catchall->elem);
5682 if (nft_set_elem_active(ext, genmask) &&
5683 !nft_set_elem_expired(ext))
5684 return ext;
5685 }
5686
5687 return NULL;
5688}
5689EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
5690
5691void *nft_set_catchall_gc(const struct nft_set *set)
5692{
5693 struct nft_set_elem_catchall *catchall, *next;
5694 struct nft_set_ext *ext;
5695 void *elem = NULL;
5696
5697 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5698 ext = nft_set_elem_ext(set, catchall->elem);
5699
5700 if (!nft_set_elem_expired(ext) ||
5701 nft_set_elem_mark_busy(ext))
5702 continue;
5703
5704 elem = catchall->elem;
5705 list_del_rcu(&catchall->list);
5706 kfree_rcu(catchall, rcu);
5707 break;
5708 }
5709
5710 return elem;
5711}
5712EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
5713
5714static int nft_setelem_catchall_insert(const struct net *net,
5715 struct nft_set *set,
5716 const struct nft_set_elem *elem,
5717 struct nft_set_ext **pext)
5718{
5719 struct nft_set_elem_catchall *catchall;
5720 u8 genmask = nft_genmask_next(net);
5721 struct nft_set_ext *ext;
5722
5723 list_for_each_entry(catchall, &set->catchall_list, list) {
5724 ext = nft_set_elem_ext(set, catchall->elem);
5725 if (nft_set_elem_active(ext, genmask)) {
5726 *pext = ext;
5727 return -EEXIST;
5728 }
5729 }
5730
5731 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
5732 if (!catchall)
5733 return -ENOMEM;
5734
5735 catchall->elem = elem->priv;
5736 list_add_tail_rcu(&catchall->list, &set->catchall_list);
5737
5738 return 0;
5739}
5740
5741static int nft_setelem_insert(const struct net *net,
5742 struct nft_set *set,
5743 const struct nft_set_elem *elem,
5744 struct nft_set_ext **ext, unsigned int flags)
5745{
5746 int ret;
5747
5748 if (flags & NFT_SET_ELEM_CATCHALL)
5749 ret = nft_setelem_catchall_insert(net, set, elem, ext);
5750 else
5751 ret = set->ops->insert(net, set, elem, ext);
5752
5753 return ret;
5754}
5755
5756static bool nft_setelem_is_catchall(const struct nft_set *set,
5757 const struct nft_set_elem *elem)
5758{
5759 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5760
5761 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5762 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
5763 return true;
5764
5765 return false;
5766}
5767
5768static void nft_setelem_activate(struct net *net, struct nft_set *set,
5769 struct nft_set_elem *elem)
5770{
5771 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5772
5773 if (nft_setelem_is_catchall(set, elem)) {
5774 nft_set_elem_change_active(net, set, ext);
5775 nft_set_elem_clear_busy(ext);
5776 } else {
5777 set->ops->activate(net, set, elem);
5778 }
5779}
5780
5781static int nft_setelem_catchall_deactivate(const struct net *net,
5782 struct nft_set *set,
5783 struct nft_set_elem *elem)
5784{
5785 struct nft_set_elem_catchall *catchall;
5786 struct nft_set_ext *ext;
5787
5788 list_for_each_entry(catchall, &set->catchall_list, list) {
5789 ext = nft_set_elem_ext(set, catchall->elem);
5790 if (!nft_is_active(net, ext) ||
5791 nft_set_elem_mark_busy(ext))
5792 continue;
5793
5794 kfree(elem->priv);
5795 elem->priv = catchall->elem;
5796 nft_set_elem_change_active(net, set, ext);
5797 return 0;
5798 }
5799
5800 return -ENOENT;
5801}
5802
5803static int __nft_setelem_deactivate(const struct net *net,
5804 struct nft_set *set,
5805 struct nft_set_elem *elem)
5806{
5807 void *priv;
5808
5809 priv = set->ops->deactivate(net, set, elem);
5810 if (!priv)
5811 return -ENOENT;
5812
5813 kfree(elem->priv);
5814 elem->priv = priv;
5815 set->ndeact++;
5816
5817 return 0;
5818}
5819
5820static int nft_setelem_deactivate(const struct net *net,
5821 struct nft_set *set,
5822 struct nft_set_elem *elem, u32 flags)
5823{
5824 int ret;
5825
5826 if (flags & NFT_SET_ELEM_CATCHALL)
5827 ret = nft_setelem_catchall_deactivate(net, set, elem);
5828 else
5829 ret = __nft_setelem_deactivate(net, set, elem);
5830
5831 return ret;
5832}
5833
5834static void nft_setelem_catchall_remove(const struct net *net,
5835 const struct nft_set *set,
5836 const struct nft_set_elem *elem)
5837{
5838 struct nft_set_elem_catchall *catchall, *next;
5839
5840 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5841 if (catchall->elem == elem->priv) {
5842 list_del_rcu(&catchall->list);
ae089831 5843 kfree_rcu(catchall, rcu);
aaa31047
PNA		 5844 break;
5845 }
5846 }
5847}
5848
5849static void nft_setelem_remove(const struct net *net,
5850 const struct nft_set *set,
5851 const struct nft_set_elem *elem)
5852{
5853 if (nft_setelem_is_catchall(set, elem))
5854 nft_setelem_catchall_remove(net, set, elem);
5855 else
5856 set->ops->remove(net, set, elem);
5857}
5858
88cccd90
PNA		 5859static bool nft_setelem_valid_key_end(const struct nft_set *set,
5860 struct nlattr **nla, u32 flags)
5861{
5862 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
5863 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
5864 if (flags & NFT_SET_ELEM_INTERVAL_END)
5865 return false;
5866 if (!nla[NFTA_SET_ELEM_KEY_END] &&
5867 !(flags & NFT_SET_ELEM_CATCHALL))
5868 return false;
5869 } else {
5870 if (nla[NFTA_SET_ELEM_KEY_END])
5871 return false;
5872 }
5873
5874 return true;
5875}
5876
60319eb1 5877static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
c016c7e4 5878 const struct nlattr *attr, u32 nlmsg_flags)
20a69341 5879{
8cfd9b0f 5880 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
20a69341 5881 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
8aeff920 5882 u8 genmask = nft_genmask_next(ctx->net);
664899e8 5883 u32 flags = 0, size = 0, num_exprs = 0;
fe2811eb 5884 struct nft_set_ext_tmpl tmpl;
c016c7e4 5885 struct nft_set_ext *ext, *ext2;
20a69341
PM		 5886 struct nft_set_elem elem;
5887 struct nft_set_binding *binding;
8aeff920 5888 struct nft_object *obj = NULL;
68e942e8 5889 struct nft_userdata *udata;
20a1452c 5890 struct nft_data_desc desc;
20a69341 5891 enum nft_registers dreg;
60319eb1 5892 struct nft_trans *trans;
c3e1b005 5893 u64 timeout;
79ebb5bb 5894 u64 expiration;
8cfd9b0f 5895 int err, i;
68e942e8 5896 u8 ulen;
20a69341 5897
8cb08174
JB		 5898 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5899 nft_set_elem_policy, NULL);
20a69341
PM		 5900 if (err < 0)
5901 return err;
5902
fe2811eb
PM		 5903 nft_set_ext_prepare(&tmpl);
5904
0e9091d6
PNA		 5905 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5906 if (err < 0)
5907 return err;
aaa31047
PNA		 5908
5909 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5910 return -EINVAL;
5911
c39ba4de
PNA		 5912 if (flags != 0) {
5913 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
5914 if (err < 0)
5915 return err;
5916 }
20a69341
PM		 5917
5918 if (set->flags & NFT_SET_MAP) {
5919 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
fe2811eb 5920 !(flags & NFT_SET_ELEM_INTERVAL_END))
20a69341
PM		 5921 return -EINVAL;
5922 } else {
5923 if (nla[NFTA_SET_ELEM_DATA] != NULL)
5924 return -EINVAL;
5925 }
5926
5a2f3dc3
PNA		 5927 if (set->flags & NFT_SET_OBJECT) {
5928 if (!nla[NFTA_SET_ELEM_OBJREF] &&
5929 !(flags & NFT_SET_ELEM_INTERVAL_END))
5930 return -EINVAL;
5931 } else {
5932 if (nla[NFTA_SET_ELEM_OBJREF])
5933 return -EINVAL;
5934 }
5935
88cccd90
PNA		 5936 if (!nft_setelem_valid_key_end(set, nla, flags))
5937 return -EINVAL;
5938
bffc124b
PNA		 5939 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
5940 (nla[NFTA_SET_ELEM_DATA] ||
5941 nla[NFTA_SET_ELEM_OBJREF] ||
5942 nla[NFTA_SET_ELEM_TIMEOUT] ||
5943 nla[NFTA_SET_ELEM_EXPIRATION] ||
5944 nla[NFTA_SET_ELEM_USERDATA] ||
48b0ae04 5945 nla[NFTA_SET_ELEM_EXPR] ||
4963674c 5946 nla[NFTA_SET_ELEM_KEY_END] ||
48b0ae04 5947 nla[NFTA_SET_ELEM_EXPRESSIONS]))
bffc124b
PNA		 5948 return -EINVAL;
5949
c3e1b005
PM		 5950 timeout = 0;
5951 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
5952 if (!(set->flags & NFT_SET_TIMEOUT))
5953 return -EINVAL;
8e1102d5
FW		 5954 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
5955 &timeout);
5956 if (err)
5957 return err;
c3e1b005
PM		 5958 } else if (set->flags & NFT_SET_TIMEOUT) {
5959 timeout = set->timeout;
5960 }
5961
79ebb5bb
LGL		 5962 expiration = 0;
5963 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
5964 if (!(set->flags & NFT_SET_TIMEOUT))
5965 return -EINVAL;
5966 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
5967 &expiration);
5968 if (err)
5969 return err;
5970 }
5971
8cfd9b0f
PNA		 5972 if (nla[NFTA_SET_ELEM_EXPR]) {
5973 struct nft_expr *expr;
5974
664899e8 5975 if (set->num_exprs && set->num_exprs != 1)
8cfd9b0f
PNA		 5976 return -EOPNOTSUPP;
5977
40944452
PNA		 5978 expr = nft_set_elem_expr_alloc(ctx, set,
5979 nla[NFTA_SET_ELEM_EXPR]);
5980 if (IS_ERR(expr))
5981 return PTR_ERR(expr);
65038428 5982
8cfd9b0f 5983 expr_array[0] = expr;
664899e8 5984 num_exprs = 1;
65038428 5985
664899e8 5986 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
8cfd9b0f 5987 err = -EOPNOTSUPP;
65038428 5988 goto err_set_elem_expr;
8cfd9b0f 5989 }
48b0ae04
PNA		 5990 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
5991 struct nft_expr *expr;
5992 struct nlattr *tmp;
5993 int left;
65038428 5994
48b0ae04
PNA		 5995 i = 0;
5996 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
664899e8
PNA		 5997 if (i == NFT_SET_EXPR_MAX ||
5998 (set->num_exprs && set->num_exprs == i)) {
48b0ae04
PNA		 5999 err = -E2BIG;
6000 goto err_set_elem_expr;
6001 }
6002 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6003 err = -EINVAL;
6004 goto err_set_elem_expr;
6005 }
6006 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6007 if (IS_ERR(expr)) {
6008 err = PTR_ERR(expr);
6009 goto err_set_elem_expr;
6010 }
6011 expr_array[i] = expr;
664899e8 6012 num_exprs++;
48b0ae04 6013
664899e8 6014 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
48b0ae04
PNA		 6015 err = -EOPNOTSUPP;
6016 goto err_set_elem_expr;
6017 }
6018 i++;
6019 }
664899e8 6020 if (set->num_exprs && set->num_exprs != i) {
48b0ae04 6021 err = -EOPNOTSUPP;
65038428 6022 goto err_set_elem_expr;
48b0ae04 6023 }
8cfd9b0f
PNA		 6024 } else if (set->num_exprs > 0) {
6025 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6026 if (err < 0)
6027 goto err_set_elem_expr_clone;
664899e8
PNA		 6028
6029 num_exprs = set->num_exprs;
40944452
PNA		 6030 }
6031
aaa31047
PNA		 6032 if (nla[NFTA_SET_ELEM_KEY]) {
6033 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6034 nla[NFTA_SET_ELEM_KEY]);
6035 if (err < 0)
6036 goto err_set_elem_expr;
20a69341 6037
c39ba4de
PNA		 6038 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6039 if (err < 0)
6040 goto err_parse_key;
aaa31047 6041 }
7b225d0b
PNA		 6042
6043 if (nla[NFTA_SET_ELEM_KEY_END]) {
6044 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6045 nla[NFTA_SET_ELEM_KEY_END]);
6046 if (err < 0)
6047 goto err_parse_key;
6048
c39ba4de
PNA		 6049 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6050 if (err < 0)
6051 goto err_parse_key_end;
7b225d0b
PNA		 6052 }
6053
c3e1b005 6054 if (timeout > 0) {
c39ba4de
PNA		 6055 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6056 if (err < 0)
6057 goto err_parse_key_end;
6058
6059 if (timeout != set->timeout) {
6060 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6061 if (err < 0)
6062 goto err_parse_key_end;
6063 }
c3e1b005 6064 }
fe2811eb 6065
664899e8
PNA		 6066 if (num_exprs) {
6067 for (i = 0; i < num_exprs; i++)
563125a7
PNA		 6068 size += expr_array[i]->ops->size;
6069
c39ba4de
PNA		 6070 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6071 sizeof(struct nft_set_elem_expr) + size);
6072 if (err < 0)
6073 goto err_parse_key_end;
563125a7 6074 }
40944452 6075
8aeff920 6076 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
4d44175a
FW		 6077 obj = nft_obj_lookup(ctx->net, ctx->table,
6078 nla[NFTA_SET_ELEM_OBJREF],
cac20fcd 6079 set->objtype, genmask);
8aeff920
PNA		 6080 if (IS_ERR(obj)) {
6081 err = PTR_ERR(obj);
7b225d0b 6082 goto err_parse_key_end;
8aeff920 6083 }
c39ba4de
PNA		 6084 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6085 if (err < 0)
6086 goto err_parse_key_end;
8aeff920
PNA		 6087 }
6088
20a69341 6089 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
fdb9c405
PNA		 6090 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6091 nla[NFTA_SET_ELEM_DATA]);
20a69341 6092 if (err < 0)
7b225d0b 6093 goto err_parse_key_end;
20a69341 6094
20a69341
PM		 6095 dreg = nft_type_to_reg(set->dtype);
6096 list_for_each_entry(binding, &set->bindings, list) {
6097 struct nft_ctx bind_ctx = {
58c78e10 6098 .net = ctx->net,
36596dad 6099 .family = ctx->family,
20a69341 6100 .table = ctx->table,
7c95f6d8 6101 .chain = (struct nft_chain *)binding->chain,
20a69341
PM		 6102 };
6103
11113e19
PM		 6104 if (!(binding->flags & NFT_SET_MAP))
6105 continue;
6106
1ec10212 6107 err = nft_validate_register_store(&bind_ctx, dreg,
fdb9c405 6108 &elem.data.val,
20a1452c 6109 desc.type, desc.len);
20a69341 6110 if (err < 0)
7b225d0b 6111 goto err_parse_data;
a654de8f 6112
20a1452c 6113 if (desc.type == NFT_DATA_VERDICT &&
fdb9c405
PNA		 6114 (elem.data.val.verdict.code == NFT_GOTO ||
6115 elem.data.val.verdict.code == NFT_JUMP))
a654de8f
PNA		 6116 nft_validate_state_update(ctx->net,
6117 NFT_VALIDATE_NEED);
20a69341 6118 }
fe2811eb 6119
c39ba4de
PNA		 6120 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6121 if (err < 0)
6122 goto err_parse_data;
20a69341
PM		 6123 }
6124
68e942e8
PM		 6125 /* The full maximum length of userdata can exceed the maximum
6126 * offset value (U8_MAX) for following extensions, therefor it
6127 * must be the last extension added.
6128 */
6129 ulen = 0;
6130 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6131 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
c39ba4de
PNA		 6132 if (ulen > 0) {
6133 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6134 ulen);
6135 if (err < 0)
6136 goto err_parse_data;
6137 }
68e942e8
PM		 6138 }
6139
7b225d0b 6140 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
fdb9c405 6141 elem.key_end.val.data, elem.data.val.data,
33758c89 6142 timeout, expiration, GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6143 if (IS_ERR(elem.priv)) {
6144 err = PTR_ERR(elem.priv);
7b225d0b 6145 goto err_parse_data;
34aae2c2 6146 }
fe2811eb
PM		 6147
6148 ext = nft_set_elem_ext(set, elem.priv);
6149 if (flags)
6150 *nft_set_ext_flags(ext) = flags;
34aae2c2 6151
68e942e8 6152 if (ulen > 0) {
34aae2c2
PNA		 6153 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6154 err = -EINVAL;
6155 goto err_elem_userdata;
6156 }
68e942e8
PM		 6157 udata = nft_set_ext_userdata(ext);
6158 udata->len = ulen - 1;
6159 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6160 }
8aeff920
PNA		 6161 if (obj) {
6162 *nft_set_ext_obj(ext) = obj;
6163 obj->use++;
6164 }
34aae2c2 6165 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
4d8f9065 6166 if (err < 0)
34aae2c2 6167 goto err_elem_free;
fe2811eb 6168
60319eb1 6169 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
4d8f9065
PNA		 6170 if (trans == NULL) {
6171 err = -ENOMEM;
34aae2c2 6172 goto err_elem_free;
4d8f9065 6173 }
60319eb1 6174
69086658 6175 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
aaa31047
PNA		 6176
6177 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
c016c7e4
PNA		 6178 if (err) {
6179 if (err == -EEXIST) {
9744a6fc
PNA		 6180 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6181 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6182 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
77a92189 6183 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
7b225d0b 6184 goto err_element_clash;
8aeff920
PNA		 6185 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6186 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6187 memcmp(nft_set_ext_data(ext),
6188 nft_set_ext_data(ext2), set->dlen) != 0) ||
6189 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6190 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6191 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
77a92189 6192 goto err_element_clash;
c016c7e4
PNA		 6193 else if (!(nlmsg_flags & NLM_F_EXCL))
6194 err = 0;
8c2d45b2
PNA		 6195 } else if (err == -ENOTEMPTY) {
6196 /* ENOTEMPTY reports overlapping between this element
6197 * and an existing one.
6198 */
6199 err = -EEXIST;
c016c7e4 6200 }
7b225d0b 6201 goto err_element_clash;
c016c7e4 6202 }
20a69341 6203
aaa31047 6204 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
35d0ac90
PNA		 6205 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
6206 err = -ENFILE;
7b225d0b 6207 goto err_set_full;
35d0ac90
PNA		 6208 }
6209
60319eb1 6210 nft_trans_elem(trans) = elem;
0854db2a 6211 nft_trans_commit_list_add_tail(ctx->net, trans);
20a69341
PM		 6212 return 0;
6213
7b225d0b 6214err_set_full:
aaa31047 6215 nft_setelem_remove(ctx->net, set, &elem);
7b225d0b 6216err_element_clash:
60319eb1 6217 kfree(trans);
34aae2c2 6218err_elem_free:
b91d9036
TY		 6219 if (obj)
6220 obj->use--;
34aae2c2 6221err_elem_userdata:
475beb9c 6222 nf_tables_set_elem_destroy(ctx, set, elem.priv);
7b225d0b 6223err_parse_data:
20a69341 6224 if (nla[NFTA_SET_ELEM_DATA] != NULL)
fdb9c405 6225 nft_data_release(&elem.data.val, desc.type);
7b225d0b
PNA		 6226err_parse_key_end:
6227 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6228err_parse_key:
20a1452c 6229 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
40944452 6230err_set_elem_expr:
664899e8 6231 for (i = 0; i < num_exprs && expr_array[i]; i++)
8cfd9b0f
PNA		 6232 nft_expr_destroy(ctx, expr_array[i]);
6233err_set_elem_expr_clone:
20a69341
PM		 6234 return err;
6235}
6236
7dab8ee3
PNA		 6237static int nf_tables_newsetelem(struct sk_buff *skb,
6238 const struct nfnl_info *info,
6239 const struct nlattr * const nla[])
20a69341 6240{
7dab8ee3
PNA		 6241 struct nftables_pernet *nft_net = nft_pernet(info->net);
6242 struct netlink_ext_ack *extack = info->extack;
6243 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6244 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6245 struct net *net = info->net;
20a69341 6246 const struct nlattr *attr;
e2b750d7 6247 struct nft_table *table;
20a69341
PM		 6248 struct nft_set *set;
6249 struct nft_ctx ctx;
a654de8f 6250 int rem, err;
20a69341 6251
7d5570ca
PNA		 6252 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6253 return -EINVAL;
6254
e2b750d7
PNA		 6255 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6256 genmask, NETLINK_CB(skb).portid);
6257 if (IS_ERR(table)) {
6258 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6259 return PTR_ERR(table);
6260 }
20a69341 6261
e2b750d7 6262 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
a3073c17
PNA		 6263 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6264 if (IS_ERR(set))
6265 return PTR_ERR(set);
958bee14 6266
20a69341
PM		 6267 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6268 return -EBUSY;
6269
e2b750d7
PNA		 6270 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6271
20a69341 6272 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7dab8ee3 6273 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
b53c1166
PNA		 6274 if (err < 0) {
6275 NL_SET_BAD_ATTR(extack, attr);
a654de8f 6276 return err;
b53c1166 6277 }
20a69341 6278 }
a654de8f 6279
0854db2a 6280 if (nft_net->validate_state == NFT_VALIDATE_DO)
e2b750d7 6281 return nft_table_validate(net, table);
a654de8f
PNA		 6282
6283 return 0;
20a69341
PM		 6284}
6285
59105446
PNA		 6286/**
6287 * nft_data_hold - hold a nft_data item
6288 *
6289 * @data: struct nft_data to release
6290 * @type: type of data
6291 *
6292 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6293 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6294 * NFT_GOTO verdicts. This function must be called on active data objects
6295 * from the second phase of the commit protocol.
6296 */
bb7b40ae 6297void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
59105446 6298{
d0e2c7de
PNA		 6299 struct nft_chain *chain;
6300 struct nft_rule *rule;
6301
59105446
PNA		 6302 if (type == NFT_DATA_VERDICT) {
6303 switch (data->verdict.code) {
6304 case NFT_JUMP:
6305 case NFT_GOTO:
d0e2c7de
PNA		 6306 chain = data->verdict.chain;
6307 chain->use++;
6308
6309 if (!nft_chain_is_bound(chain))
6310 break;
6311
6312 chain->table->use++;
6313 list_for_each_entry(rule, &chain->rules, list)
6314 chain->use++;
6315
6316 nft_chain_add(chain->table, chain);
59105446
PNA		 6317 break;
6318 }
6319 }
6320}
6321
f8bb7889
PNA		 6322static void nft_setelem_data_activate(const struct net *net,
6323 const struct nft_set *set,
6324 struct nft_set_elem *elem)
59105446
PNA		 6325{
6326 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6327
6328 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6329 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6330 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6331 (*nft_set_ext_obj(ext))->use++;
6332}
6333
f8bb7889
PNA		 6334static void nft_setelem_data_deactivate(const struct net *net,
6335 const struct nft_set *set,
6336 struct nft_set_elem *elem)
59105446
PNA		 6337{
6338 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6339
6340 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6341 nft_data_release(nft_set_ext_data(ext), set->dtype);
6342 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6343 (*nft_set_ext_obj(ext))->use--;
6344}
6345
60319eb1 6346static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
20a69341
PM		 6347 const struct nlattr *attr)
6348{
6349 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
3971ca14 6350 struct nft_set_ext_tmpl tmpl;
20a69341 6351 struct nft_set_elem elem;
3971ca14 6352 struct nft_set_ext *ext;
60319eb1 6353 struct nft_trans *trans;
3971ca14 6354 u32 flags = 0;
20a69341
PM		 6355 int err;
6356
8cb08174
JB		 6357 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6358 nft_set_elem_policy, NULL);
20a69341 6359 if (err < 0)
20a1452c 6360 return err;
20a69341 6361
aaa31047
PNA		 6362 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6363 if (err < 0)
6364 return err;
6365
6366 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
20a1452c 6367 return -EINVAL;
20a69341 6368
88cccd90
PNA		 6369 if (!nft_setelem_valid_key_end(set, nla, flags))
6370 return -EINVAL;
6371
3971ca14
PNA		 6372 nft_set_ext_prepare(&tmpl);
6373
c39ba4de
PNA		 6374 if (flags != 0) {
6375 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6376 if (err < 0)
6377 return err;
6378 }
3971ca14 6379
aaa31047
PNA		 6380 if (nla[NFTA_SET_ELEM_KEY]) {
6381 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6382 nla[NFTA_SET_ELEM_KEY]);
6383 if (err < 0)
6384 return err;
20a69341 6385
c39ba4de
PNA		 6386 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6387 if (err < 0)
6388 goto fail_elem;
aaa31047 6389 }
3971ca14 6390
7b225d0b
PNA		 6391 if (nla[NFTA_SET_ELEM_KEY_END]) {
6392 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6393 nla[NFTA_SET_ELEM_KEY_END]);
6394 if (err < 0)
c39ba4de 6395 goto fail_elem;
7b225d0b 6396
c39ba4de
PNA		 6397 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6398 if (err < 0)
6399 goto fail_elem_key_end;
7b225d0b
PNA		 6400 }
6401
3971ca14 6402 err = -ENOMEM;
7b225d0b
PNA		 6403 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6404 elem.key_end.val.data, NULL, 0, 0,
33758c89 6405 GFP_KERNEL_ACCOUNT);
34aae2c2
PNA		 6406 if (IS_ERR(elem.priv)) {
6407 err = PTR_ERR(elem.priv);
c39ba4de 6408 goto fail_elem_key_end;
34aae2c2 6409 }
3971ca14
PNA		 6410
6411 ext = nft_set_elem_ext(set, elem.priv);
6412 if (flags)
6413 *nft_set_ext_flags(ext) = flags;
6414
60319eb1 6415 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
20a1452c
PNA		 6416 if (trans == NULL)
6417 goto fail_trans;
20a69341 6418
aaa31047
PNA		 6419 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6420 if (err < 0)
20a1452c 6421 goto fail_ops;
cc02e457 6422
f8bb7889 6423 nft_setelem_data_deactivate(ctx->net, set, &elem);
59105446 6424
60319eb1 6425 nft_trans_elem(trans) = elem;
0854db2a 6426 nft_trans_commit_list_add_tail(ctx->net, trans);
0dc13625 6427 return 0;
cc02e457 6428
20a1452c 6429fail_ops:
cc02e457 6430 kfree(trans);
20a1452c 6431fail_trans:
3971ca14 6432 kfree(elem.priv);
c39ba4de
PNA		 6433fail_elem_key_end:
6434 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
20a1452c
PNA		 6435fail_elem:
6436 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
20a69341
PM		 6437 return err;
6438}
6439
e6ba7cb6
PNA		 6440static int nft_setelem_flush(const struct nft_ctx *ctx,
6441 struct nft_set *set,
6442 const struct nft_set_iter *iter,
6443 struct nft_set_elem *elem)
8411b644
PNA		 6444{
6445 struct nft_trans *trans;
6446 int err;
6447
6448 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6449 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6450 if (!trans)
6451 return -ENOMEM;
6452
1ba1c414 6453 if (!set->ops->flush(ctx->net, set, elem->priv)) {
8411b644
PNA		 6454 err = -ENOENT;
6455 goto err1;
6456 }
b2c11e4b 6457 set->ndeact++;
8411b644 6458
f8bb7889 6459 nft_setelem_data_deactivate(ctx->net, set, elem);
de70185d
PNA		 6460 nft_trans_elem_set(trans) = set;
6461 nft_trans_elem(trans) = *elem;
0854db2a 6462 nft_trans_commit_list_add_tail(ctx->net, trans);
8411b644
PNA		 6463
6464 return 0;
6465err1:
6466 kfree(trans);
6467 return err;
6468}
6469
aaa31047
PNA		 6470static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6471 struct nft_set *set,
6472 struct nft_set_elem *elem)
6473{
6474 struct nft_trans *trans;
6475
6476 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6477 sizeof(struct nft_trans_elem), GFP_KERNEL);
6478 if (!trans)
6479 return -ENOMEM;
6480
6481 nft_setelem_data_deactivate(ctx->net, set, elem);
6482 nft_trans_elem_set(trans) = set;
6483 nft_trans_elem(trans) = *elem;
6484 nft_trans_commit_list_add_tail(ctx->net, trans);
6485
6486 return 0;
6487}
6488
6489static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6490 struct nft_set *set)
6491{
6492 u8 genmask = nft_genmask_next(ctx->net);
6493 struct nft_set_elem_catchall *catchall;
6494 struct nft_set_elem elem;
6495 struct nft_set_ext *ext;
6496 int ret = 0;
6497
6498 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6499 ext = nft_set_elem_ext(set, catchall->elem);
6500 if (!nft_set_elem_active(ext, genmask) ||
6501 nft_set_elem_mark_busy(ext))
6502 continue;
6503
6504 elem.priv = catchall->elem;
6505 ret = __nft_set_catchall_flush(ctx, set, &elem);
6506 if (ret < 0)
6507 break;
6508 }
6509
6510 return ret;
6511}
6512
e6ba7cb6
PNA		 6513static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
6514{
6515 struct nft_set_iter iter = {
6516 .genmask = genmask,
6517 .fn = nft_setelem_flush,
6518 };
6519
6520 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 6521 if (!iter.err)
6522 iter.err = nft_set_catchall_flush(ctx, set);
e6ba7cb6
PNA		 6523
6524 return iter.err;
6525}
6526
7dab8ee3
PNA		 6527static int nf_tables_delsetelem(struct sk_buff *skb,
6528 const struct nfnl_info *info,
6529 const struct nlattr * const nla[])
20a69341 6530{
7dab8ee3
PNA		 6531 struct netlink_ext_ack *extack = info->extack;
6532 u8 genmask = nft_genmask_next(info->net);
e2b750d7 6533 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 6534 struct net *net = info->net;
20a69341 6535 const struct nlattr *attr;
e2b750d7 6536 struct nft_table *table;
20a69341
PM		 6537 struct nft_set *set;
6538 struct nft_ctx ctx;
60319eb1 6539 int rem, err = 0;
20a69341 6540
e2b750d7
PNA		 6541 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6542 genmask, NETLINK_CB(skb).portid);
6543 if (IS_ERR(table)) {
6544 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6545 return PTR_ERR(table);
6546 }
20a69341 6547
e2b750d7 6548 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
20a69341
PM		 6549 if (IS_ERR(set))
6550 return PTR_ERR(set);
6551 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6552 return -EBUSY;
6553
e2b750d7
PNA		 6554 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6555
e6ba7cb6
PNA		 6556 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6557 return nft_set_flush(&ctx, set, genmask);
8411b644 6558
20a69341
PM		 6559 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6560 err = nft_del_setelem(&ctx, set, attr);
b53c1166
PNA		 6561 if (err < 0) {
6562 NL_SET_BAD_ATTR(extack, attr);
60319eb1 6563 break;
b53c1166 6564 }
20a69341 6565 }
60319eb1 6566 return err;
20a69341
PM		 6567}
6568
cfed7e1b
PM		 6569void nft_set_gc_batch_release(struct rcu_head *rcu)
6570{
6571 struct nft_set_gc_batch *gcb;
6572 unsigned int i;
6573
6574 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
6575 for (i = 0; i < gcb->head.cnt; i++)
61f9e292 6576 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
cfed7e1b
PM		 6577 kfree(gcb);
6578}
cfed7e1b
PM		 6579
6580struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
6581 gfp_t gfp)
6582{
6583 struct nft_set_gc_batch *gcb;
6584
6585 gcb = kzalloc(sizeof(*gcb), gfp);
6586 if (gcb == NULL)
6587 return gcb;
6588 gcb->head.set = set;
6589 return gcb;
6590}
cfed7e1b 6591
e5009240
PNA		 6592/*
6593 * Stateful objects
6594 */
6595
6596/**
6597 * nft_register_obj- register nf_tables stateful object type
3db86c39 6598 * @obj_type: object type
e5009240
PNA		 6599 *
6600 * Registers the object type for use with nf_tables. Returns zero on
6601 * success or a negative errno code otherwise.
6602 */
6603int nft_register_obj(struct nft_object_type *obj_type)
6604{
6605 if (obj_type->type == NFT_OBJECT_UNSPEC)
6606 return -EINVAL;
6607
6608 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6609 list_add_rcu(&obj_type->list, &nf_tables_objects);
6610 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6611 return 0;
6612}
6613EXPORT_SYMBOL_GPL(nft_register_obj);
6614
6615/**
6616 * nft_unregister_obj - unregister nf_tables object type
3db86c39 6617 * @obj_type: object type
e5009240
PNA		 6618 *
6619 * Unregisters the object type for use with nf_tables.
6620 */
6621void nft_unregister_obj(struct nft_object_type *obj_type)
6622{
6623 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6624 list_del_rcu(&obj_type->list);
6625 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6626}
6627EXPORT_SYMBOL_GPL(nft_unregister_obj);
6628
4d44175a
FW		 6629struct nft_object *nft_obj_lookup(const struct net *net,
6630 const struct nft_table *table,
cac20fcd
PNA		 6631 const struct nlattr *nla, u32 objtype,
6632 u8 genmask)
e5009240 6633{
4d44175a
FW		 6634 struct nft_object_hash_key k = { .table = table };
6635 char search[NFT_OBJ_MAXNAMELEN];
6636 struct rhlist_head *tmp, *list;
e5009240
PNA		 6637 struct nft_object *obj;
6638
872f6903 6639 nla_strscpy(search, nla, sizeof(search));
4d44175a
FW		 6640 k.name = search;
6641
6642 WARN_ON_ONCE(!rcu_read_lock_held() &&
6643 !lockdep_commit_lock_is_held(net));
6644
6645 rcu_read_lock();
6646 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
6647 if (!list)
6648 goto out;
6649
6650 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
6651 if (objtype == obj->ops->type->type &&
6652 nft_active_genmask(obj, genmask)) {
6653 rcu_read_unlock();
e5009240 6654 return obj;
4d44175a 6655 }
e5009240 6656 }
4d44175a
FW		 6657out:
6658 rcu_read_unlock();
e5009240
PNA		 6659 return ERR_PTR(-ENOENT);
6660}
cac20fcd 6661EXPORT_SYMBOL_GPL(nft_obj_lookup);
e5009240 6662
cac20fcd
PNA		 6663static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
6664 const struct nlattr *nla,
6665 u32 objtype, u8 genmask)
3ecbfd65
HS		 6666{
6667 struct nft_object *obj;
6668
6669 list_for_each_entry(obj, &table->objects, list) {
6670 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
6671 objtype == obj->ops->type->type &&
6672 nft_active_genmask(obj, genmask))
6673 return obj;
6674 }
6675 return ERR_PTR(-ENOENT);
6676}
6677
e5009240 6678static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
b2fbd044
LZ		 6679 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
6680 .len = NFT_TABLE_MAXNAMELEN - 1 },
6681 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
6682 .len = NFT_OBJ_MAXNAMELEN - 1 },
e5009240
PNA		 6683 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
6684 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
3ecbfd65 6685 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
b131c964
JGG		 6686 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
6687 .len = NFT_USERDATA_MAXLEN },
e5009240
PNA		 6688};
6689
84fba055
FW		 6690static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
6691 const struct nft_object_type *type,
e5009240
PNA		 6692 const struct nlattr *attr)
6693{
5b4c6e38 6694 struct nlattr **tb;
dfc46034 6695 const struct nft_object_ops *ops;
e5009240 6696 struct nft_object *obj;
5b4c6e38
GS		 6697 int err = -ENOMEM;
6698
6699 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
6700 if (!tb)
6701 goto err1;
e5009240
PNA		 6702
6703 if (attr) {
8cb08174
JB		 6704 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
6705 type->policy, NULL);
e5009240 6706 if (err < 0)
5b4c6e38 6707 goto err2;
e5009240
PNA		 6708 } else {
6709 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
6710 }
6711
dfc46034
PBG		 6712 if (type->select_ops) {
6713 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
6714 if (IS_ERR(ops)) {
6715 err = PTR_ERR(ops);
5b4c6e38 6716 goto err2;
dfc46034
PBG		 6717 }
6718 } else {
6719 ops = type->ops;
6720 }
6721
e5009240 6722 err = -ENOMEM;
33758c89 6723 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
5b4c6e38
GS		 6724 if (!obj)
6725 goto err2;
e5009240 6726
dfc46034 6727 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
e5009240 6728 if (err < 0)
5b4c6e38 6729 goto err3;
e5009240 6730
dfc46034
PBG		 6731 obj->ops = ops;
6732
5b4c6e38 6733 kfree(tb);
e5009240 6734 return obj;
5b4c6e38 6735err3:
e5009240 6736 kfree(obj);
5b4c6e38
GS		 6737err2:
6738 kfree(tb);
e5009240
PNA		 6739err1:
6740 return ERR_PTR(err);
6741}
6742
6743static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
43da04a5 6744 struct nft_object *obj, bool reset)
e5009240
PNA		 6745{
6746 struct nlattr *nest;
6747
ae0be8de 6748 nest = nla_nest_start_noflag(skb, attr);
e5009240
PNA		 6749 if (!nest)
6750 goto nla_put_failure;
dfc46034 6751 if (obj->ops->dump(skb, obj, reset) < 0)
e5009240
PNA		 6752 goto nla_put_failure;
6753 nla_nest_end(skb, nest);
6754 return 0;
6755
6756nla_put_failure:
6757 return -1;
6758}
6759
6760static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
6761{
6762 const struct nft_object_type *type;
6763
6764 list_for_each_entry(type, &nf_tables_objects, list) {
6765 if (objtype == type->type)
6766 return type;
6767 }
6768 return NULL;
6769}
6770
452238e8
FW		 6771static const struct nft_object_type *
6772nft_obj_type_get(struct net *net, u32 objtype)
e5009240
PNA		 6773{
6774 const struct nft_object_type *type;
6775
6776 type = __nft_obj_type_get(objtype);
6777 if (type != NULL && try_module_get(type->owner))
6778 return type;
6779
f102d66b 6780 lockdep_nfnl_nft_mutex_not_held();
e5009240
PNA		 6781#ifdef CONFIG_MODULES
6782 if (type == NULL) {
eb014de4 6783 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
e5009240
PNA		 6784 return ERR_PTR(-EAGAIN);
6785 }
6786#endif
6787 return ERR_PTR(-ENOENT);
6788}
6789
d62d0ba9
FFM		 6790static int nf_tables_updobj(const struct nft_ctx *ctx,
6791 const struct nft_object_type *type,
6792 const struct nlattr *attr,
6793 struct nft_object *obj)
6794{
6795 struct nft_object *newobj;
6796 struct nft_trans *trans;
dad3bdee
FW		 6797 int err = -ENOMEM;
6798
6799 if (!try_module_get(type->owner))
6800 return -ENOENT;
d62d0ba9
FFM		 6801
6802 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
6803 sizeof(struct nft_trans_obj));
6804 if (!trans)
dad3bdee 6805 goto err_trans;
d62d0ba9
FFM		 6806
6807 newobj = nft_obj_init(ctx, type, attr);
6808 if (IS_ERR(newobj)) {
6809 err = PTR_ERR(newobj);
b74ae961 6810 goto err_free_trans;
d62d0ba9
FFM		 6811 }
6812
6813 nft_trans_obj(trans) = obj;
6814 nft_trans_obj_update(trans) = true;
6815 nft_trans_obj_newobj(trans) = newobj;
0854db2a 6816 nft_trans_commit_list_add_tail(ctx->net, trans);
d62d0ba9
FFM		 6817
6818 return 0;
b74ae961
DC		 6819
6820err_free_trans:
d62d0ba9 6821 kfree(trans);
dad3bdee
FW		 6822err_trans:
6823 module_put(type->owner);
d62d0ba9
FFM		 6824 return err;
6825}
6826
7dab8ee3
PNA		 6827static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
6828 const struct nlattr * const nla[])
e5009240 6829{
7dab8ee3
PNA		 6830 struct netlink_ext_ack *extack = info->extack;
6831 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 6832 u8 family = info->nfmsg->nfgen_family;
e5009240 6833 const struct nft_object_type *type;
7dab8ee3 6834 struct net *net = info->net;
e5009240
PNA		 6835 struct nft_table *table;
6836 struct nft_object *obj;
6837 struct nft_ctx ctx;
6838 u32 objtype;
6839 int err;
6840
6841 if (!nla[NFTA_OBJ_TYPE] ||
6842 !nla[NFTA_OBJ_NAME] ||
6843 !nla[NFTA_OBJ_DATA])
6844 return -EINVAL;
6845
6001a930
PNA		 6846 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
6847 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 6848 if (IS_ERR(table)) {
6849 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 6850 return PTR_ERR(table);
36dd1bcc 6851 }
e5009240
PNA		 6852
6853 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 6854 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
e5009240
PNA		 6855 if (IS_ERR(obj)) {
6856 err = PTR_ERR(obj);
36dd1bcc
PNA		 6857 if (err != -ENOENT) {
6858 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 6859 return err;
36dd1bcc 6860 }
1a28ad74 6861 } else {
7dab8ee3 6862 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 6863 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 6864 return -EEXIST;
36dd1bcc 6865 }
7dab8ee3 6866 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
d62d0ba9
FFM		 6867 return -EOPNOTSUPP;
6868
fd57d0cb 6869 type = __nft_obj_type_get(objtype);
7dab8ee3 6870 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
d62d0ba9
FFM		 6871
6872 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
e5009240
PNA		 6873 }
6874
7dab8ee3 6875 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240 6876
452238e8 6877 type = nft_obj_type_get(net, objtype);
e5009240
PNA		 6878 if (IS_ERR(type))
6879 return PTR_ERR(type);
6880
84fba055 6881 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
e5009240
PNA		 6882 if (IS_ERR(obj)) {
6883 err = PTR_ERR(obj);
b131c964 6884 goto err_init;
e5009240 6885 }
d152159b 6886 obj->key.table = table;
3ecbfd65
HS		 6887 obj->handle = nf_tables_alloc_handle(table);
6888
33758c89 6889 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
d152159b 6890 if (!obj->key.name) {
61509575 6891 err = -ENOMEM;
b131c964
JGG		 6892 goto err_strdup;
6893 }
6894
6895 if (nla[NFTA_OBJ_USERDATA]) {
85db827a 6896 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL);
b131c964
JGG		 6897 if (obj->udata == NULL)
6898 goto err_userdata;
6899
85db827a 6900 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
61509575 6901 }
e5009240
PNA		 6902
6903 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
6904 if (err < 0)
b131c964 6905 goto err_trans;
e5009240 6906
4d44175a
FW		 6907 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
6908 nft_objname_ht_params);
6909 if (err < 0)
b131c964 6910 goto err_obj_ht;
4d44175a 6911
e5009240
PNA		 6912 list_add_tail_rcu(&obj->list, &table->objects);
6913 table->use++;
6914 return 0;
b131c964 6915err_obj_ht:
4d44175a
FW		 6916 /* queued in transaction log */
6917 INIT_LIST_HEAD(&obj->list);
6918 return err;
b131c964 6919err_trans:
b131c964 6920 kfree(obj->udata);
85dfd816
PNA		 6921err_userdata:
6922 kfree(obj->key.name);
b131c964 6923err_strdup:
dfc46034 6924 if (obj->ops->destroy)
00bfb320 6925 obj->ops->destroy(&ctx, obj);
e5009240 6926 kfree(obj);
b131c964 6927err_init:
e5009240
PNA		 6928 module_put(type->owner);
6929 return err;
6930}
6931
6932static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
6933 u32 portid, u32 seq, int event, u32 flags,
6934 int family, const struct nft_table *table,
43da04a5 6935 struct nft_object *obj, bool reset)
e5009240 6936{
e5009240
PNA		 6937 struct nlmsghdr *nlh;
6938
dedb67c4 6939 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 6940 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
6941 NFNETLINK_V0, nft_base_seq(net));
6942 if (!nlh)
e5009240
PNA		 6943 goto nla_put_failure;
6944
e5009240 6945 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
d152159b 6946 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
dfc46034 6947 nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
e5009240 6948 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
3ecbfd65
HS		 6949 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset) ||
6950 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
6951 NFTA_OBJ_PAD))
e5009240
PNA		 6952 goto nla_put_failure;
6953
b131c964
JGG		 6954 if (obj->udata &&
6955 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
6956 goto nla_put_failure;
6957
e5009240
PNA		 6958 nlmsg_end(skb, nlh);
6959 return 0;
6960
6961nla_put_failure:
6962 nlmsg_trim(skb, nlh);
6963 return -1;
6964}
6965
a9fea2a3 6966struct nft_obj_filter {
e46abbcc 6967 char *table;
a9fea2a3
PNA		 6968 u32 type;
6969};
6970
e5009240
PNA		 6971static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
6972{
6973 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
e5009240 6974 const struct nft_table *table;
e5009240 6975 unsigned int idx = 0, s_idx = cb->args[0];
a9fea2a3 6976 struct nft_obj_filter *filter = cb->data;
e5009240
PNA		 6977 struct net *net = sock_net(skb->sk);
6978 int family = nfmsg->nfgen_family;
0854db2a 6979 struct nftables_pernet *nft_net;
43da04a5
PNA		 6980 struct nft_object *obj;
6981 bool reset = false;
6982
6983 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
6984 reset = true;
e5009240
PNA		 6985
6986 rcu_read_lock();
d59d2f82 6987 nft_net = nft_pernet(net);
34002783 6988 cb->seq = READ_ONCE(nft_net->base_seq);
e5009240 6989
0854db2a 6990 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 6991 if (family != NFPROTO_UNSPEC && family != table->family)
e5009240
PNA		 6992 continue;
6993
36596dad
PNA		 6994 list_for_each_entry_rcu(obj, &table->objects, list) {
6995 if (!nft_is_active(net, obj))
6996 goto cont;
6997 if (idx < s_idx)
6998 goto cont;
6999 if (idx > s_idx)
7000 memset(&cb->args[1], 0,
7001 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7002 if (filter && filter->table &&
36596dad
PNA		 7003 strcmp(filter->table, table->name))
7004 goto cont;
7005 if (filter &&
7006 filter->type != NFT_OBJECT_UNSPEC &&
7007 obj->ops->type->type != filter->type)
7008 goto cont;
8e6cf365 7009 if (reset) {
68df2ed5 7010 char *buf = kasprintf(GFP_ATOMIC,
c520292f 7011 "%s:%u",
8e6cf365 7012 table->name,
0854db2a 7013 nft_net->base_seq);
8e6cf365
RGB		 7014
7015 audit_log_nfcfg(buf,
7016 family,
7017 obj->handle,
14224039 7018 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7019 GFP_ATOMIC);
8e6cf365
RGB		 7020 kfree(buf);
7021 }
7022
36596dad
PNA		 7023 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
7024 cb->nlh->nlmsg_seq,
7025 NFT_MSG_NEWOBJ,
7026 NLM_F_MULTI | NLM_F_APPEND,
98319cb9 7027 table->family, table,
36596dad
PNA		 7028 obj, reset) < 0)
7029 goto done;
e5009240 7030
36596dad 7031 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
e5009240 7032cont:
36596dad 7033 idx++;
e5009240
PNA		 7034 }
7035 }
7036done:
7037 rcu_read_unlock();
7038
7039 cb->args[0] = idx;
7040 return skb->len;
7041}
7042
90fd131a 7043static int nf_tables_dump_obj_start(struct netlink_callback *cb)
a9fea2a3 7044{
90fd131a
FW		 7045 const struct nlattr * const *nla = cb->data;
7046 struct nft_obj_filter *filter = NULL;
e46abbcc 7047
90fd131a
FW		 7048 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
7049 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7050 if (!filter)
7051 return -ENOMEM;
7052
7053 if (nla[NFTA_OBJ_TABLE]) {
7054 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7055 if (!filter->table) {
7056 kfree(filter);
7057 return -ENOMEM;
7058 }
7059 }
7060
7061 if (nla[NFTA_OBJ_TYPE])
7062 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
8bea728d 7063 }
a9fea2a3 7064
90fd131a 7065 cb->data = filter;
a9fea2a3
PNA		 7066 return 0;
7067}
7068
90fd131a 7069static int nf_tables_dump_obj_done(struct netlink_callback *cb)
a9fea2a3 7070{
90fd131a 7071 struct nft_obj_filter *filter = cb->data;
a9fea2a3 7072
90fd131a
FW		 7073 if (filter) {
7074 kfree(filter->table);
7075 kfree(filter);
e46abbcc 7076 }
a9fea2a3 7077
90fd131a 7078 return 0;
a9fea2a3
PNA		 7079}
7080
d9adf22a 7081/* called with rcu_read_lock held */
797d4980
PNA		 7082static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7083 const struct nlattr * const nla[])
e5009240 7084{
797d4980
PNA		 7085 struct netlink_ext_ack *extack = info->extack;
7086 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 7087 u8 family = info->nfmsg->nfgen_family;
e5009240 7088 const struct nft_table *table;
797d4980 7089 struct net *net = info->net;
e5009240
PNA		 7090 struct nft_object *obj;
7091 struct sk_buff *skb2;
43da04a5 7092 bool reset = false;
e5009240
PNA		 7093 u32 objtype;
7094 int err;
7095
797d4980 7096 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
e5009240 7097 struct netlink_dump_control c = {
90fd131a 7098 .start = nf_tables_dump_obj_start,
e5009240 7099 .dump = nf_tables_dump_obj,
a9fea2a3 7100 .done = nf_tables_dump_obj_done,
d9adf22a 7101 .module = THIS_MODULE,
90fd131a 7102 .data = (void *)nla,
e5009240 7103 };
a9fea2a3 7104
797d4980 7105 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
e5009240
PNA		 7106 }
7107
7108 if (!nla[NFTA_OBJ_NAME] ||
7109 !nla[NFTA_OBJ_TYPE])
7110 return -EINVAL;
7111
6001a930 7112 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
36dd1bcc
PNA		 7113 if (IS_ERR(table)) {
7114 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7115 return PTR_ERR(table);
36dd1bcc 7116 }
e5009240
PNA		 7117
7118 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
4d44175a 7119 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
36dd1bcc
PNA		 7120 if (IS_ERR(obj)) {
7121 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
e5009240 7122 return PTR_ERR(obj);
36dd1bcc 7123 }
e5009240 7124
d9adf22a 7125 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
e5009240
PNA		 7126 if (!skb2)
7127 return -ENOMEM;
7128
797d4980 7129 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
43da04a5
PNA		 7130 reset = true;
7131
8e6cf365 7132 if (reset) {
0854db2a
FW		 7133 const struct nftables_pernet *nft_net;
7134 char *buf;
7135
d59d2f82 7136 nft_net = nft_pernet(net);
0854db2a 7137 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
8e6cf365
RGB		 7138
7139 audit_log_nfcfg(buf,
7140 family,
7141 obj->handle,
14224039 7142 AUDIT_NFT_OP_OBJ_RESET,
68df2ed5 7143 GFP_ATOMIC);
8e6cf365
RGB		 7144 kfree(buf);
7145 }
7146
e5009240 7147 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 7148 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
43da04a5 7149 family, table, obj, reset);
e5009240 7150 if (err < 0)
ee921183 7151 goto err_fill_obj_info;
e5009240 7152
ee921183
PNA		 7153 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7154
7155err_fill_obj_info:
e5009240
PNA		 7156 kfree_skb(skb2);
7157 return err;
e5009240
PNA		 7158}
7159
00bfb320 7160static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
e5009240 7161{
dfc46034 7162 if (obj->ops->destroy)
00bfb320 7163 obj->ops->destroy(ctx, obj);
e5009240 7164
dfc46034 7165 module_put(obj->ops->type->owner);
d152159b 7166 kfree(obj->key.name);
bc7a7082 7167 kfree(obj->udata);
e5009240
PNA		 7168 kfree(obj);
7169}
7170
7dab8ee3
PNA		 7171static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7172 const struct nlattr * const nla[])
e5009240 7173{
7dab8ee3
PNA		 7174 struct netlink_ext_ack *extack = info->extack;
7175 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7176 u8 family = info->nfmsg->nfgen_family;
7dab8ee3 7177 struct net *net = info->net;
36dd1bcc 7178 const struct nlattr *attr;
e5009240
PNA		 7179 struct nft_table *table;
7180 struct nft_object *obj;
7181 struct nft_ctx ctx;
7182 u32 objtype;
7183
7184 if (!nla[NFTA_OBJ_TYPE] ||
3ecbfd65 7185 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
e5009240
PNA		 7186 return -EINVAL;
7187
6001a930
PNA		 7188 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7189 NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7190 if (IS_ERR(table)) {
7191 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
e5009240 7192 return PTR_ERR(table);
36dd1bcc 7193 }
e5009240
PNA		 7194
7195 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
36dd1bcc
PNA		 7196 if (nla[NFTA_OBJ_HANDLE]) {
7197 attr = nla[NFTA_OBJ_HANDLE];
7198 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7199 } else {
7200 attr = nla[NFTA_OBJ_NAME];
4d44175a 7201 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
36dd1bcc
PNA		 7202 }
7203
7204 if (IS_ERR(obj)) {
7205 NL_SET_BAD_ATTR(extack, attr);
e5009240 7206 return PTR_ERR(obj);
36dd1bcc
PNA		 7207 }
7208 if (obj->use > 0) {
7209 NL_SET_BAD_ATTR(extack, attr);
e5009240 7210 return -EBUSY;
36dd1bcc 7211 }
e5009240 7212
7dab8ee3 7213 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
e5009240
PNA		 7214
7215 return nft_delobj(&ctx, obj);
7216}
7217
d152159b 7218void nft_obj_notify(struct net *net, const struct nft_table *table,
25e94a99 7219 struct nft_object *obj, u32 portid, u32 seq, int event,
6fb721cf 7220 u16 flags, int family, int report, gfp_t gfp)
e5009240 7221{
d59d2f82 7222 struct nftables_pernet *nft_net = nft_pernet(net);
e5009240
PNA		 7223 struct sk_buff *skb;
7224 int err;
c520292f 7225 char *buf = kasprintf(gfp, "%s:%u",
0854db2a 7226 table->name, nft_net->base_seq);
8e6cf365
RGB		 7227
7228 audit_log_nfcfg(buf,
7229 family,
7230 obj->handle,
7231 event == NFT_MSG_NEWOBJ ?
c520292f
RGB		 7232 AUDIT_NFT_OP_OBJ_REGISTER :
7233 AUDIT_NFT_OP_OBJ_UNREGISTER,
68df2ed5 7234 gfp);
8e6cf365 7235 kfree(buf);
e5009240 7236
2599e989
PNA		 7237 if (!report &&
7238 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 7239 return;
e5009240 7240
2599e989 7241 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
e5009240
PNA		 7242 if (skb == NULL)
7243 goto err;
7244
6fb721cf
PNA		 7245 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7246 flags & (NLM_F_CREATE | NLM_F_EXCL),
7247 family, table, obj, false);
e5009240
PNA		 7248 if (err < 0) {
7249 kfree_skb(skb);
7250 goto err;
7251 }
7252
0854db2a 7253 nft_notify_enqueue(skb, report, &nft_net->notify_list);
25e94a99 7254 return;
e5009240 7255err:
25e94a99 7256 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
e5009240 7257}
2599e989
PNA		 7258EXPORT_SYMBOL_GPL(nft_obj_notify);
7259
25e94a99
PNA		 7260static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7261 struct nft_object *obj, int event)
2599e989 7262{
25e94a99 7263 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
6fb721cf 7264 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
2599e989 7265}
e5009240 7266
3b49e2e9
PNA		 7267/*
7268 * Flow tables
7269 */
7270void nft_register_flowtable_type(struct nf_flowtable_type *type)
7271{
7272 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7273 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7274 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7275}
7276EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7277
7278void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7279{
7280 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7281 list_del_rcu(&type->list);
7282 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7283}
7284EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7285
7286static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7287 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7288 .len = NFT_NAME_MAXLEN - 1 },
7289 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7290 .len = NFT_NAME_MAXLEN - 1 },
7291 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
3ecbfd65 7292 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8bb69f3b 7293 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
3b49e2e9
PNA		 7294};
7295
cac20fcd
PNA		 7296struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7297 const struct nlattr *nla, u8 genmask)
3b49e2e9
PNA		 7298{
7299 struct nft_flowtable *flowtable;
7300
d9adf22a 7301 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
3b49e2e9
PNA		 7302 if (!nla_strcmp(nla, flowtable->name) &&
7303 nft_active_genmask(flowtable, genmask))
7304 return flowtable;
7305 }
7306 return ERR_PTR(-ENOENT);
7307}
cac20fcd 7308EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
3b49e2e9 7309
9b05b6e1
LGL		 7310void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7311 struct nft_flowtable *flowtable,
7312 enum nft_trans_phase phase)
7313{
7314 switch (phase) {
7315 case NFT_TRANS_PREPARE:
7316 case NFT_TRANS_ABORT:
7317 case NFT_TRANS_RELEASE:
7318 flowtable->use--;
954d8297 7319 fallthrough;
9b05b6e1
LGL		 7320 default:
7321 return;
7322 }
7323}
7324EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7325
ae0662f8 7326static struct nft_flowtable *
cac20fcd
PNA		 7327nft_flowtable_lookup_byhandle(const struct nft_table *table,
7328 const struct nlattr *nla, u8 genmask)
3ecbfd65
HS		 7329{
7330 struct nft_flowtable *flowtable;
7331
7332 list_for_each_entry(flowtable, &table->flowtables, list) {
7333 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7334 nft_active_genmask(flowtable, genmask))
7335 return flowtable;
7336 }
7337 return ERR_PTR(-ENOENT);
7338}
7339
d9246a53
PNA		 7340struct nft_flowtable_hook {
7341 u32 num;
7342 int priority;
7343 struct list_head list;
7344};
7345
3b49e2e9
PNA		 7346static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7347 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7348 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7349 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7350};
7351
d9246a53
PNA		 7352static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
7353 const struct nlattr *attr,
7354 struct nft_flowtable_hook *flowtable_hook,
5b6743fb 7355 struct nft_flowtable *flowtable, bool add)
3b49e2e9 7356{
3b49e2e9 7357 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
3f0465a9 7358 struct nft_hook *hook;
3b49e2e9 7359 int hooknum, priority;
3f0465a9 7360 int err;
3b49e2e9 7361
d9246a53
PNA		 7362 INIT_LIST_HEAD(&flowtable_hook->list);
7363
8cb08174
JB		 7364 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX, attr,
7365 nft_flowtable_hook_policy, NULL);
3b49e2e9
PNA		 7366 if (err < 0)
7367 return err;
7368
5b6743fb
PNA		 7369 if (add) {
7370 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
7371 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY])
7372 return -EINVAL;
3b49e2e9 7373
5b6743fb
PNA		 7374 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7375 if (hooknum != NF_NETDEV_INGRESS)
7376 return -EOPNOTSUPP;
7377
7378 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7379
7380 flowtable_hook->priority = priority;
7381 flowtable_hook->num = hooknum;
7382 } else {
7383 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7384 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7385 if (hooknum != flowtable->hooknum)
7386 return -EOPNOTSUPP;
7387 }
7388
7389 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7390 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7391 if (priority != flowtable->data.priority)
7392 return -EOPNOTSUPP;
7393 }
3b49e2e9 7394
5b6743fb
PNA		 7395 flowtable_hook->priority = flowtable->data.priority;
7396 flowtable_hook->num = flowtable->hooknum;
7397 }
3b49e2e9 7398
05abe445
PNA		 7399 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7400 err = nf_tables_parse_netdev_hooks(ctx->net,
7401 tb[NFTA_FLOWTABLE_HOOK_DEVS],
7402 &flowtable_hook->list);
7403 if (err < 0)
7404 return err;
7405 }
3b49e2e9 7406
d9246a53 7407 list_for_each_entry(hook, &flowtable_hook->list, list) {
3f0465a9 7408 hook->ops.pf = NFPROTO_NETDEV;
5b6743fb
PNA		 7409 hook->ops.hooknum = flowtable_hook->num;
7410 hook->ops.priority = flowtable_hook->priority;
7411 hook->ops.priv = &flowtable->data;
7412 hook->ops.hook = flowtable->data.type->hook;
3b49e2e9
PNA		 7413 }
7414
3b49e2e9
PNA		 7415 return err;
7416}
7417
98319cb9 7418static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
3b49e2e9
PNA		 7419{
7420 const struct nf_flowtable_type *type;
7421
7422 list_for_each_entry(type, &nf_tables_flowtables, list) {
98319cb9 7423 if (family == type->family)
3b49e2e9
PNA		 7424 return type;
7425 }
7426 return NULL;
7427}
7428
452238e8
FW		 7429static const struct nf_flowtable_type *
7430nft_flowtable_type_get(struct net *net, u8 family)
3b49e2e9
PNA		 7431{
7432 const struct nf_flowtable_type *type;
7433
98319cb9 7434 type = __nft_flowtable_type_get(family);
3b49e2e9
PNA		 7435 if (type != NULL && try_module_get(type->owner))
7436 return type;
7437
f102d66b 7438 lockdep_nfnl_nft_mutex_not_held();
3b49e2e9
PNA		 7439#ifdef CONFIG_MODULES
7440 if (type == NULL) {
eb014de4 7441 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
3b49e2e9
PNA		 7442 return ERR_PTR(-EAGAIN);
7443 }
7444#endif
7445 return ERR_PTR(-ENOENT);
7446}
7447
5acab914 7448/* Only called from error and netdev event paths. */
ff4bf2f4
PNA		 7449static void nft_unregister_flowtable_hook(struct net *net,
7450 struct nft_flowtable *flowtable,
7451 struct nft_hook *hook)
7452{
7453 nf_unregister_net_hook(net, &hook->ops);
7454 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7455 FLOW_BLOCK_UNBIND);
7456}
7457
f9a43007
PNA		 7458static void __nft_unregister_flowtable_net_hooks(struct net *net,
7459 struct list_head *hook_list,
7460 bool release_netdev)
3b49e2e9 7461{
f9a43007 7462 struct nft_hook *hook, *next;
3b49e2e9 7463
f9a43007 7464 list_for_each_entry_safe(hook, next, hook_list, list) {
5acab914 7465 nf_unregister_net_hook(net, &hook->ops);
f9a43007
PNA		 7466 if (release_netdev) {
7467 list_del(&hook->list);
ab5e5c06 7468 kfree_rcu(hook, rcu);
f9a43007
PNA		 7469 }
7470 }
7471}
7472
7473static void nft_unregister_flowtable_net_hooks(struct net *net,
7474 struct list_head *hook_list)
7475{
7476 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
3f0465a9
PNA		 7477}
7478
7479static int nft_register_flowtable_net_hooks(struct net *net,
7480 struct nft_table *table,
f9382669 7481 struct list_head *hook_list,
3f0465a9
PNA		 7482 struct nft_flowtable *flowtable)
7483{
7484 struct nft_hook *hook, *hook2, *next;
7485 struct nft_flowtable *ft;
7486 int err, i = 0;
7487
f9382669 7488 list_for_each_entry(hook, hook_list, list) {
3f0465a9 7489 list_for_each_entry(ft, &table->flowtables, list) {
86fe2c19
PNA		 7490 if (!nft_is_active_next(net, ft))
7491 continue;
7492
3f0465a9
PNA		 7493 list_for_each_entry(hook2, &ft->hook_list, list) {
7494 if (hook->ops.dev == hook2->ops.dev &&
7495 hook->ops.pf == hook2->ops.pf) {
77a92189 7496 err = -EEXIST;
3f0465a9
PNA		 7497 goto err_unregister_net_hooks;
7498 }
7499 }
7500 }
3b49e2e9 7501
d7c03a9f 7502 err = flowtable->data.type->setup(&flowtable->data,
7503 hook->ops.dev,
7504 FLOW_BLOCK_BIND);
3f0465a9
PNA		 7505 if (err < 0)
7506 goto err_unregister_net_hooks;
7507
d7c03a9f 7508 err = nf_register_net_hook(net, &hook->ops);
7509 if (err < 0) {
7510 flowtable->data.type->setup(&flowtable->data,
7511 hook->ops.dev,
7512 FLOW_BLOCK_UNBIND);
7513 goto err_unregister_net_hooks;
7514 }
7515
3f0465a9 7516 i++;
3b49e2e9 7517 }
3f0465a9
PNA		 7518
7519 return 0;
7520
7521err_unregister_net_hooks:
f9382669 7522 list_for_each_entry_safe(hook, next, hook_list, list) {
3f0465a9
PNA		 7523 if (i-- <= 0)
7524 break;
7525
ff4bf2f4 7526 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7527 list_del_rcu(&hook->list);
7528 kfree_rcu(hook, rcu);
7529 }
7530
7531 return err;
3b49e2e9
PNA		 7532}
7533
389a2cbc
PNA		 7534static void nft_flowtable_hooks_destroy(struct list_head *hook_list)
7535{
7536 struct nft_hook *hook, *next;
7537
7538 list_for_each_entry_safe(hook, next, hook_list, list) {
7539 list_del_rcu(&hook->list);
7540 kfree_rcu(hook, rcu);
7541 }
7542}
7543
78d9f48f
PNA		 7544static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
7545 struct nft_flowtable *flowtable)
7546{
7547 const struct nlattr * const *nla = ctx->nla;
7548 struct nft_flowtable_hook flowtable_hook;
7549 struct nft_hook *hook, *next;
7550 struct nft_trans *trans;
7551 bool unregister = false;
7b35582c 7552 u32 flags;
78d9f48f
PNA		 7553 int err;
7554
7555 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7556 &flowtable_hook, flowtable, false);
78d9f48f
PNA		 7557 if (err < 0)
7558 return err;
7559
7560 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7561 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
7562 list_del(&hook->list);
7563 kfree(hook);
7564 }
7565 }
7566
7b35582c
PNA		 7567 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7568 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
c271cc9f
PNA		 7569 if (flags & ~NFT_FLOWTABLE_MASK) {
7570 err = -EOPNOTSUPP;
7571 goto err_flowtable_update_hook;
7572 }
7b35582c 7573 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
c271cc9f
PNA		 7574 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
7575 err = -EOPNOTSUPP;
7576 goto err_flowtable_update_hook;
7577 }
7b35582c
PNA		 7578 } else {
7579 flags = flowtable->data.flags;
7580 }
7581
78d9f48f
PNA		 7582 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
7583 &flowtable_hook.list, flowtable);
7584 if (err < 0)
7585 goto err_flowtable_update_hook;
7586
7587 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
7588 sizeof(struct nft_trans_flowtable));
7589 if (!trans) {
7590 unregister = true;
7591 err = -ENOMEM;
7592 goto err_flowtable_update_hook;
7593 }
7594
7b35582c 7595 nft_trans_flowtable_flags(trans) = flags;
78d9f48f
PNA		 7596 nft_trans_flowtable(trans) = flowtable;
7597 nft_trans_flowtable_update(trans) = true;
7598 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7599 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
7600
0854db2a 7601 nft_trans_commit_list_add_tail(ctx->net, trans);
78d9f48f
PNA		 7602
7603 return 0;
7604
7605err_flowtable_update_hook:
7606 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7607 if (unregister)
7608 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
7609 list_del_rcu(&hook->list);
7610 kfree_rcu(hook, rcu);
7611 }
7612
7613 return err;
7614
7615}
7616
7dab8ee3
PNA		 7617static int nf_tables_newflowtable(struct sk_buff *skb,
7618 const struct nfnl_info *info,
7619 const struct nlattr * const nla[])
3b49e2e9 7620{
7dab8ee3 7621 struct netlink_ext_ack *extack = info->extack;
d9246a53 7622 struct nft_flowtable_hook flowtable_hook;
7dab8ee3 7623 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7624 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7625 const struct nf_flowtable_type *type;
3f0465a9
PNA		 7626 struct nft_flowtable *flowtable;
7627 struct nft_hook *hook, *next;
7dab8ee3 7628 struct net *net = info->net;
3b49e2e9
PNA		 7629 struct nft_table *table;
7630 struct nft_ctx ctx;
3f0465a9 7631 int err;
3b49e2e9
PNA		 7632
7633 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7634 !nla[NFTA_FLOWTABLE_NAME] ||
7635 !nla[NFTA_FLOWTABLE_HOOK])
7636 return -EINVAL;
7637
cac20fcd 7638 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 7639 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7640 if (IS_ERR(table)) {
7641 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 7642 return PTR_ERR(table);
36dd1bcc 7643 }
3b49e2e9 7644
cac20fcd
PNA		 7645 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
7646 genmask);
3b49e2e9
PNA		 7647 if (IS_ERR(flowtable)) {
7648 err = PTR_ERR(flowtable);
36dd1bcc
PNA		 7649 if (err != -ENOENT) {
7650 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 7651 return err;
36dd1bcc 7652 }
3b49e2e9 7653 } else {
7dab8ee3 7654 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
36dd1bcc 7655 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
3b49e2e9 7656 return -EEXIST;
36dd1bcc 7657 }
3b49e2e9 7658
7dab8ee3 7659 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
78d9f48f 7660
7dab8ee3 7661 return nft_flowtable_update(&ctx, info->nlh, flowtable);
3b49e2e9
PNA		 7662 }
7663
7dab8ee3 7664 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
3b49e2e9 7665
33758c89 7666 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 7667 if (!flowtable)
7668 return -ENOMEM;
7669
7670 flowtable->table = table;
3ecbfd65 7671 flowtable->handle = nf_tables_alloc_handle(table);
3f0465a9 7672 INIT_LIST_HEAD(&flowtable->hook_list);
3ecbfd65 7673
33758c89 7674 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
3b49e2e9
PNA		 7675 if (!flowtable->name) {
7676 err = -ENOMEM;
7677 goto err1;
7678 }
7679
452238e8 7680 type = nft_flowtable_type_get(net, family);
3b49e2e9
PNA		 7681 if (IS_ERR(type)) {
7682 err = PTR_ERR(type);
7683 goto err2;
7684 }
7685
8bb69f3b
PNA		 7686 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7687 flowtable->data.flags =
7688 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7e6136f1
PNA		 7689 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
7690 err = -EOPNOTSUPP;
8bb69f3b 7691 goto err3;
7e6136f1 7692 }
8bb69f3b
PNA		 7693 }
7694
7695 write_pnet(&flowtable->data.net, net);
3b49e2e9 7696 flowtable->data.type = type;
a268de77 7697 err = type->init(&flowtable->data);
3b49e2e9
PNA		 7698 if (err < 0)
7699 goto err3;
7700
d9246a53 7701 err = nft_flowtable_parse_hook(&ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7702 &flowtable_hook, flowtable, true);
3b49e2e9 7703 if (err < 0)
a268de77 7704 goto err4;
3b49e2e9 7705
d9246a53
PNA		 7706 list_splice(&flowtable_hook.list, &flowtable->hook_list);
7707 flowtable->data.priority = flowtable_hook.priority;
7708 flowtable->hooknum = flowtable_hook.num;
7709
f9382669
PNA		 7710 err = nft_register_flowtable_net_hooks(ctx.net, table,
7711 &flowtable->hook_list,
7712 flowtable);
2d285f26 7713 if (err < 0) {
389a2cbc 7714 nft_flowtable_hooks_destroy(&flowtable->hook_list);
3f0465a9 7715 goto err4;
2d285f26 7716 }
3b49e2e9
PNA		 7717
7718 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
7719 if (err < 0)
3f0465a9 7720 goto err5;
3b49e2e9
PNA		 7721
7722 list_add_tail_rcu(&flowtable->list, &table->flowtables);
7723 table->use++;
7724
7725 return 0;
a268de77 7726err5:
3f0465a9 7727 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
ff4bf2f4 7728 nft_unregister_flowtable_hook(net, flowtable, hook);
3f0465a9
PNA		 7729 list_del_rcu(&hook->list);
7730 kfree_rcu(hook, rcu);
7731 }
a268de77
FF		 7732err4:
7733 flowtable->data.type->free(&flowtable->data);
3b49e2e9
PNA		 7734err3:
7735 module_put(type->owner);
7736err2:
7737 kfree(flowtable->name);
7738err1:
7739 kfree(flowtable);
7740 return err;
7741}
7742
3003055f
PNA		 7743static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
7744{
7745 struct nft_hook *this, *next;
7746
7747 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
7748 list_del(&this->list);
7749 kfree(this);
7750 }
7751}
7752
abadb2f8
PNA		 7753static int nft_delflowtable_hook(struct nft_ctx *ctx,
7754 struct nft_flowtable *flowtable)
7755{
7756 const struct nlattr * const *nla = ctx->nla;
7757 struct nft_flowtable_hook flowtable_hook;
b6d9014a 7758 LIST_HEAD(flowtable_del_list);
3003055f 7759 struct nft_hook *this, *hook;
abadb2f8
PNA		 7760 struct nft_trans *trans;
7761 int err;
7762
7763 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
5b6743fb 7764 &flowtable_hook, flowtable, false);
abadb2f8
PNA		 7765 if (err < 0)
7766 return err;
7767
3003055f 7768 list_for_each_entry(this, &flowtable_hook.list, list) {
abadb2f8
PNA		 7769 hook = nft_hook_list_find(&flowtable->hook_list, this);
7770 if (!hook) {
7771 err = -ENOENT;
7772 goto err_flowtable_del_hook;
7773 }
b6d9014a 7774 list_move(&hook->list, &flowtable_del_list);
abadb2f8
PNA		 7775 }
7776
7777 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
7778 sizeof(struct nft_trans_flowtable));
3003055f
PNA		 7779 if (!trans) {
7780 err = -ENOMEM;
7781 goto err_flowtable_del_hook;
7782 }
abadb2f8
PNA		 7783
7784 nft_trans_flowtable(trans) = flowtable;
7785 nft_trans_flowtable_update(trans) = true;
7786 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
b6d9014a 7787 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
3003055f 7788 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8 7789
0854db2a 7790 nft_trans_commit_list_add_tail(ctx->net, trans);
abadb2f8
PNA		 7791
7792 return 0;
7793
7794err_flowtable_del_hook:
b6d9014a 7795 list_splice(&flowtable_del_list, &flowtable->hook_list);
3003055f 7796 nft_flowtable_hook_release(&flowtable_hook);
abadb2f8
PNA		 7797
7798 return err;
7799}
7800
7dab8ee3
PNA		 7801static int nf_tables_delflowtable(struct sk_buff *skb,
7802 const struct nfnl_info *info,
7803 const struct nlattr * const nla[])
3b49e2e9 7804{
7dab8ee3
PNA		 7805 struct netlink_ext_ack *extack = info->extack;
7806 u8 genmask = nft_genmask_next(info->net);
ef4b65e5 7807 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 7808 struct nft_flowtable *flowtable;
7dab8ee3 7809 struct net *net = info->net;
36dd1bcc 7810 const struct nlattr *attr;
3b49e2e9
PNA		 7811 struct nft_table *table;
7812 struct nft_ctx ctx;
7813
e603ea4b
PNA		 7814 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7815 (!nla[NFTA_FLOWTABLE_NAME] &&
7816 !nla[NFTA_FLOWTABLE_HANDLE]))
7817 return -EINVAL;
7818
cac20fcd 7819 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 7820 genmask, NETLINK_CB(skb).portid);
36dd1bcc
PNA		 7821 if (IS_ERR(table)) {
7822 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
3b49e2e9 7823 return PTR_ERR(table);
36dd1bcc 7824 }
3b49e2e9 7825
36dd1bcc
PNA		 7826 if (nla[NFTA_FLOWTABLE_HANDLE]) {
7827 attr = nla[NFTA_FLOWTABLE_HANDLE];
7828 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
7829 } else {
7830 attr = nla[NFTA_FLOWTABLE_NAME];
7831 flowtable = nft_flowtable_lookup(table, attr, genmask);
7832 }
7833
7834 if (IS_ERR(flowtable)) {
7835 NL_SET_BAD_ATTR(extack, attr);
7836 return PTR_ERR(flowtable);
7837 }
abadb2f8 7838
7dab8ee3 7839 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
abadb2f8
PNA		 7840
7841 if (nla[NFTA_FLOWTABLE_HOOK])
7842 return nft_delflowtable_hook(&ctx, flowtable);
7843
36dd1bcc
PNA		 7844 if (flowtable->use > 0) {
7845 NL_SET_BAD_ATTR(extack, attr);
3b49e2e9 7846 return -EBUSY;
36dd1bcc 7847 }
3b49e2e9 7848
3b49e2e9
PNA		 7849 return nft_delflowtable(&ctx, flowtable);
7850}
7851
7852static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
7853 u32 portid, u32 seq, int event,
7854 u32 flags, int family,
c42d8bda
PNA		 7855 struct nft_flowtable *flowtable,
7856 struct list_head *hook_list)
3b49e2e9
PNA		 7857{
7858 struct nlattr *nest, *nest_devs;
3f0465a9 7859 struct nft_hook *hook;
3b49e2e9 7860 struct nlmsghdr *nlh;
3b49e2e9
PNA		 7861
7862 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
19c28b13
PNA		 7863 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7864 NFNETLINK_V0, nft_base_seq(net));
7865 if (!nlh)
3b49e2e9
PNA		 7866 goto nla_put_failure;
7867
3b49e2e9
PNA		 7868 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
7869 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
3ecbfd65
HS		 7870 nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
7871 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
8bb69f3b
PNA		 7872 NFTA_FLOWTABLE_PAD) ||
7873 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
3b49e2e9
PNA		 7874 goto nla_put_failure;
7875
ae0be8de 7876 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
eb895086
KL		 7877 if (!nest)
7878 goto nla_put_failure;
3b49e2e9 7879 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
71a8a63b 7880 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
3b49e2e9
PNA		 7881 goto nla_put_failure;
7882
ae0be8de 7883 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
3b49e2e9
PNA		 7884 if (!nest_devs)
7885 goto nla_put_failure;
7886
c42d8bda 7887 list_for_each_entry_rcu(hook, hook_list, list) {
3f0465a9 7888 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
3b49e2e9
PNA		 7889 goto nla_put_failure;
7890 }
7891 nla_nest_end(skb, nest_devs);
7892 nla_nest_end(skb, nest);
7893
7894 nlmsg_end(skb, nlh);
7895 return 0;
7896
7897nla_put_failure:
7898 nlmsg_trim(skb, nlh);
7899 return -1;
7900}
7901
7902struct nft_flowtable_filter {
7903 char *table;
7904};
7905
7906static int nf_tables_dump_flowtable(struct sk_buff *skb,
7907 struct netlink_callback *cb)
7908{
7909 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
7910 struct nft_flowtable_filter *filter = cb->data;
7911 unsigned int idx = 0, s_idx = cb->args[0];
7912 struct net *net = sock_net(skb->sk);
7913 int family = nfmsg->nfgen_family;
7914 struct nft_flowtable *flowtable;
0854db2a 7915 struct nftables_pernet *nft_net;
3b49e2e9
PNA		 7916 const struct nft_table *table;
7917
7918 rcu_read_lock();
d59d2f82 7919 nft_net = nft_pernet(net);
34002783 7920 cb->seq = READ_ONCE(nft_net->base_seq);
3b49e2e9 7921
0854db2a 7922 list_for_each_entry_rcu(table, &nft_net->tables, list) {
98319cb9 7923 if (family != NFPROTO_UNSPEC && family != table->family)
3b49e2e9
PNA		 7924 continue;
7925
36596dad
PNA		 7926 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
7927 if (!nft_is_active(net, flowtable))
7928 goto cont;
7929 if (idx < s_idx)
7930 goto cont;
7931 if (idx > s_idx)
7932 memset(&cb->args[1], 0,
7933 sizeof(cb->args) - sizeof(cb->args[0]));
360cc79d 7934 if (filter && filter->table &&
36596dad
PNA		 7935 strcmp(filter->table, table->name))
7936 goto cont;
3b49e2e9 7937
36596dad
PNA		 7938 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
7939 cb->nlh->nlmsg_seq,
7940 NFT_MSG_NEWFLOWTABLE,
7941 NLM_F_MULTI | NLM_F_APPEND,
c42d8bda
PNA		 7942 table->family,
7943 flowtable,
7944 &flowtable->hook_list) < 0)
36596dad 7945 goto done;
3b49e2e9 7946
36596dad 7947 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3b49e2e9 7948cont:
36596dad 7949 idx++;
3b49e2e9
PNA		 7950 }
7951 }
7952done:
7953 rcu_read_unlock();
7954
7955 cb->args[0] = idx;
7956 return skb->len;
7957}
7958
90fd131a 7959static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
3b49e2e9 7960{
90fd131a
FW		 7961 const struct nlattr * const *nla = cb->data;
7962 struct nft_flowtable_filter *filter = NULL;
3b49e2e9 7963
90fd131a
FW		 7964 if (nla[NFTA_FLOWTABLE_TABLE]) {
7965 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7966 if (!filter)
7967 return -ENOMEM;
3b49e2e9 7968
90fd131a
FW		 7969 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
7970 GFP_ATOMIC);
7971 if (!filter->table) {
7972 kfree(filter);
7973 return -ENOMEM;
7974 }
7975 }
3b49e2e9 7976
90fd131a 7977 cb->data = filter;
3b49e2e9
PNA		 7978 return 0;
7979}
7980
90fd131a 7981static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
3b49e2e9 7982{
90fd131a 7983 struct nft_flowtable_filter *filter = cb->data;
3b49e2e9 7984
3b49e2e9 7985 if (!filter)
90fd131a 7986 return 0;
3b49e2e9 7987
90fd131a
FW		 7988 kfree(filter->table);
7989 kfree(filter);
7990
7991 return 0;
3b49e2e9
PNA		 7992}
7993
d9adf22a 7994/* called with rcu_read_lock held */
797d4980
PNA		 7995static int nf_tables_getflowtable(struct sk_buff *skb,
7996 const struct nfnl_info *info,
7997 const struct nlattr * const nla[])
3b49e2e9 7998{
797d4980 7999 u8 genmask = nft_genmask_cur(info->net);
ef4b65e5 8000 u8 family = info->nfmsg->nfgen_family;
3b49e2e9 8001 struct nft_flowtable *flowtable;
3b49e2e9 8002 const struct nft_table *table;
797d4980 8003 struct net *net = info->net;
3b49e2e9
PNA		 8004 struct sk_buff *skb2;
8005 int err;
8006
797d4980 8007 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3b49e2e9 8008 struct netlink_dump_control c = {
90fd131a 8009 .start = nf_tables_dump_flowtable_start,
3b49e2e9
PNA		 8010 .dump = nf_tables_dump_flowtable,
8011 .done = nf_tables_dump_flowtable_done,
d9adf22a 8012 .module = THIS_MODULE,
90fd131a 8013 .data = (void *)nla,
3b49e2e9
PNA		 8014 };
8015
797d4980 8016 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3b49e2e9
PNA		 8017 }
8018
8019 if (!nla[NFTA_FLOWTABLE_NAME])
8020 return -EINVAL;
8021
cac20fcd 8022 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
6001a930 8023 genmask, 0);
3b49e2e9
PNA		 8024 if (IS_ERR(table))
8025 return PTR_ERR(table);
8026
cac20fcd
PNA		 8027 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8028 genmask);
03a0120f 8029 if (IS_ERR(flowtable))
3b49e2e9
PNA		 8030 return PTR_ERR(flowtable);
8031
d9adf22a 8032 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3b49e2e9
PNA		 8033 if (!skb2)
8034 return -ENOMEM;
8035
8036 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
797d4980 8037 info->nlh->nlmsg_seq,
3b49e2e9 8038 NFT_MSG_NEWFLOWTABLE, 0, family,
c42d8bda 8039 flowtable, &flowtable->hook_list);
3b49e2e9 8040 if (err < 0)
ee921183 8041 goto err_fill_flowtable_info;
3b49e2e9 8042
ee921183
PNA		 8043 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8044
8045err_fill_flowtable_info:
3b49e2e9
PNA		 8046 kfree_skb(skb2);
8047 return err;
8048}
8049
8050static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8051 struct nft_flowtable *flowtable,
c42d8bda 8052 struct list_head *hook_list,
3b49e2e9
PNA		 8053 int event)
8054{
d59d2f82 8055 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3b49e2e9 8056 struct sk_buff *skb;
6fb721cf 8057 u16 flags = 0;
3b49e2e9
PNA		 8058 int err;
8059
dceababa 8060 if (!ctx->report &&
3b49e2e9
PNA		 8061 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8062 return;
8063
8064 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8065 if (skb == NULL)
8066 goto err;
8067
6fb721cf
PNA		 8068 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8069 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8070
3b49e2e9 8071 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
6fb721cf 8072 ctx->seq, event, flags,
c42d8bda 8073 ctx->family, flowtable, hook_list);
3b49e2e9
PNA		 8074 if (err < 0) {
8075 kfree_skb(skb);
8076 goto err;
8077 }
8078
0854db2a 8079 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3b49e2e9
PNA		 8080 return;
8081err:
8082 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8083}
8084
3b49e2e9
PNA		 8085static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8086{
3f0465a9
PNA		 8087 struct nft_hook *hook, *next;
8088
5acab914 8089 flowtable->data.type->free(&flowtable->data);
3f0465a9 8090 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
5acab914
PNA		 8091 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8092 FLOW_BLOCK_UNBIND);
3f0465a9
PNA		 8093 list_del_rcu(&hook->list);
8094 kfree(hook);
8095 }
3b49e2e9 8096 kfree(flowtable->name);
3b49e2e9 8097 module_put(flowtable->data.type->owner);
a12486eb 8098 kfree(flowtable);
3b49e2e9
PNA		 8099}
8100
84d7fce6
PNA		 8101static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8102 u32 portid, u32 seq)
8103{
d59d2f82 8104 struct nftables_pernet *nft_net = nft_pernet(net);
84d7fce6 8105 struct nlmsghdr *nlh;
784b4e61 8106 char buf[TASK_COMM_LEN];
dedb67c4 8107 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
84d7fce6 8108
19c28b13
PNA		 8109 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8110 NFNETLINK_V0, nft_base_seq(net));
8111 if (!nlh)
84d7fce6
PNA		 8112 goto nla_put_failure;
8113
0854db2a 8114 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
784b4e61
PS		 8115 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8116 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
84d7fce6
PNA		 8117 goto nla_put_failure;
8118
053c095a
JB		 8119 nlmsg_end(skb, nlh);
8120 return 0;
84d7fce6
PNA		 8121
8122nla_put_failure:
8123 nlmsg_trim(skb, nlh);
8124 return -EMSGSIZE;
8125}
8126
3b49e2e9
PNA		 8127static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8128 struct nft_flowtable *flowtable)
8129{
3f0465a9 8130 struct nft_hook *hook;
3b49e2e9 8131
3f0465a9
PNA		 8132 list_for_each_entry(hook, &flowtable->hook_list, list) {
8133 if (hook->ops.dev != dev)
3b49e2e9
PNA		 8134 continue;
8135
5acab914 8136 /* flow_offload_netdev_event() cleans up entries for us. */
ff4bf2f4 8137 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
3f0465a9
PNA		 8138 list_del_rcu(&hook->list);
8139 kfree_rcu(hook, rcu);
3b49e2e9
PNA		 8140 break;
8141 }
8142}
8143
8144static int nf_tables_flowtable_event(struct notifier_block *this,
8145 unsigned long event, void *ptr)
8146{
8147 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8148 struct nft_flowtable *flowtable;
0854db2a 8149 struct nftables_pernet *nft_net;
3b49e2e9 8150 struct nft_table *table;
0a2cf5ee 8151 struct net *net;
3b49e2e9
PNA		 8152
8153 if (event != NETDEV_UNREGISTER)
8154 return 0;
8155
6a48de01 8156 net = dev_net(dev);
d59d2f82 8157 nft_net = nft_pernet(net);
0854db2a
FW		 8158 mutex_lock(&nft_net->commit_mutex);
8159 list_for_each_entry(table, &nft_net->tables, list) {
36596dad
PNA		 8160 list_for_each_entry(flowtable, &table->flowtables, list) {
8161 nft_flowtable_event(event, dev, flowtable);
3b49e2e9
PNA		 8162 }
8163 }
0854db2a 8164 mutex_unlock(&nft_net->commit_mutex);
6a48de01 8165
3b49e2e9
PNA		 8166 return NOTIFY_DONE;
8167}
8168
8169static struct notifier_block nf_tables_flowtable_notifier = {
8170 .notifier_call = nf_tables_flowtable_event,
8171};
8172
25e94a99
PNA		 8173static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8174 int event)
84d7fce6
PNA		 8175{
8176 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8177 struct sk_buff *skb2;
8178 int err;
8179
dceababa 8180 if (!nlmsg_report(nlh) &&
84d7fce6 8181 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
25e94a99 8182 return;
84d7fce6 8183
84d7fce6
PNA		 8184 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8185 if (skb2 == NULL)
8186 goto err;
8187
8188 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8189 nlh->nlmsg_seq);
8190 if (err < 0) {
8191 kfree_skb(skb2);
8192 goto err;
8193 }
8194
25e94a99
PNA		 8195 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8196 nlmsg_report(nlh), GFP_KERNEL);
8197 return;
84d7fce6 8198err:
25e94a99
PNA		 8199 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8200 -ENOBUFS);
84d7fce6
PNA		 8201}
8202
797d4980
PNA		 8203static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8204 const struct nlattr * const nla[])
84d7fce6 8205{
84d7fce6
PNA		 8206 struct sk_buff *skb2;
8207 int err;
8208
d9adf22a 8209 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
84d7fce6
PNA		 8210 if (skb2 == NULL)
8211 return -ENOMEM;
8212
797d4980
PNA		 8213 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8214 info->nlh->nlmsg_seq);
84d7fce6 8215 if (err < 0)
ee921183 8216 goto err_fill_gen_info;
84d7fce6 8217
797d4980 8218 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
ee921183
PNA		 8219
8220err_fill_gen_info:
84d7fce6
PNA		 8221 kfree_skb(skb2);
8222 return err;
8223}
8224
96518518
PM		 8225static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8226 [NFT_MSG_NEWTABLE] = {
50f2db9e
PNA		 8227 .call = nf_tables_newtable,
8228 .type = NFNL_CB_BATCH,
96518518
PM		 8229 .attr_count = NFTA_TABLE_MAX,
8230 .policy = nft_table_policy,
8231 },
8232 [NFT_MSG_GETTABLE] = {
50f2db9e
PNA		 8233 .call = nf_tables_gettable,
8234 .type = NFNL_CB_RCU,
96518518
PM		 8235 .attr_count = NFTA_TABLE_MAX,
8236 .policy = nft_table_policy,
8237 },
8238 [NFT_MSG_DELTABLE] = {
50f2db9e
PNA		 8239 .call = nf_tables_deltable,
8240 .type = NFNL_CB_BATCH,
96518518
PM		 8241 .attr_count = NFTA_TABLE_MAX,
8242 .policy = nft_table_policy,
8243 },
8244 [NFT_MSG_NEWCHAIN] = {
50f2db9e
PNA		 8245 .call = nf_tables_newchain,
8246 .type = NFNL_CB_BATCH,
96518518
PM		 8247 .attr_count = NFTA_CHAIN_MAX,
8248 .policy = nft_chain_policy,
8249 },
8250 [NFT_MSG_GETCHAIN] = {
50f2db9e
PNA		 8251 .call = nf_tables_getchain,
8252 .type = NFNL_CB_RCU,
96518518
PM		 8253 .attr_count = NFTA_CHAIN_MAX,
8254 .policy = nft_chain_policy,
8255 },
8256 [NFT_MSG_DELCHAIN] = {
50f2db9e
PNA		 8257 .call = nf_tables_delchain,
8258 .type = NFNL_CB_BATCH,
96518518
PM		 8259 .attr_count = NFTA_CHAIN_MAX,
8260 .policy = nft_chain_policy,
8261 },
8262 [NFT_MSG_NEWRULE] = {
50f2db9e
PNA		 8263 .call = nf_tables_newrule,
8264 .type = NFNL_CB_BATCH,
96518518
PM		 8265 .attr_count = NFTA_RULE_MAX,
8266 .policy = nft_rule_policy,
8267 },
8268 [NFT_MSG_GETRULE] = {
50f2db9e
PNA		 8269 .call = nf_tables_getrule,
8270 .type = NFNL_CB_RCU,
96518518
PM		 8271 .attr_count = NFTA_RULE_MAX,
8272 .policy = nft_rule_policy,
8273 },
8274 [NFT_MSG_DELRULE] = {
50f2db9e
PNA		 8275 .call = nf_tables_delrule,
8276 .type = NFNL_CB_BATCH,
96518518
PM		 8277 .attr_count = NFTA_RULE_MAX,
8278 .policy = nft_rule_policy,
8279 },
20a69341 8280 [NFT_MSG_NEWSET] = {
50f2db9e
PNA		 8281 .call = nf_tables_newset,
8282 .type = NFNL_CB_BATCH,
20a69341
PM		 8283 .attr_count = NFTA_SET_MAX,
8284 .policy = nft_set_policy,
8285 },
8286 [NFT_MSG_GETSET] = {
50f2db9e
PNA		 8287 .call = nf_tables_getset,
8288 .type = NFNL_CB_RCU,
20a69341
PM		 8289 .attr_count = NFTA_SET_MAX,
8290 .policy = nft_set_policy,
8291 },
8292 [NFT_MSG_DELSET] = {
50f2db9e
PNA		 8293 .call = nf_tables_delset,
8294 .type = NFNL_CB_BATCH,
20a69341
PM		 8295 .attr_count = NFTA_SET_MAX,
8296 .policy = nft_set_policy,
8297 },
8298 [NFT_MSG_NEWSETELEM] = {
50f2db9e
PNA		 8299 .call = nf_tables_newsetelem,
8300 .type = NFNL_CB_BATCH,
20a69341
PM		 8301 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8302 .policy = nft_set_elem_list_policy,
8303 },
8304 [NFT_MSG_GETSETELEM] = {
50f2db9e
PNA		 8305 .call = nf_tables_getsetelem,
8306 .type = NFNL_CB_RCU,
20a69341
PM		 8307 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8308 .policy = nft_set_elem_list_policy,
8309 },
8310 [NFT_MSG_DELSETELEM] = {
50f2db9e
PNA		 8311 .call = nf_tables_delsetelem,
8312 .type = NFNL_CB_BATCH,
20a69341
PM		 8313 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8314 .policy = nft_set_elem_list_policy,
8315 },
84d7fce6 8316 [NFT_MSG_GETGEN] = {
50f2db9e
PNA		 8317 .call = nf_tables_getgen,
8318 .type = NFNL_CB_RCU,
84d7fce6 8319 },
e5009240 8320 [NFT_MSG_NEWOBJ] = {
50f2db9e
PNA		 8321 .call = nf_tables_newobj,
8322 .type = NFNL_CB_BATCH,
e5009240
PNA		 8323 .attr_count = NFTA_OBJ_MAX,
8324 .policy = nft_obj_policy,
8325 },
8326 [NFT_MSG_GETOBJ] = {
50f2db9e
PNA		 8327 .call = nf_tables_getobj,
8328 .type = NFNL_CB_RCU,
e5009240
PNA		 8329 .attr_count = NFTA_OBJ_MAX,
8330 .policy = nft_obj_policy,
8331 },
8332 [NFT_MSG_DELOBJ] = {
50f2db9e
PNA		 8333 .call = nf_tables_delobj,
8334 .type = NFNL_CB_BATCH,
e5009240
PNA		 8335 .attr_count = NFTA_OBJ_MAX,
8336 .policy = nft_obj_policy,
8337 },
43da04a5 8338 [NFT_MSG_GETOBJ_RESET] = {
50f2db9e
PNA		 8339 .call = nf_tables_getobj,
8340 .type = NFNL_CB_RCU,
43da04a5
PNA		 8341 .attr_count = NFTA_OBJ_MAX,
8342 .policy = nft_obj_policy,
8343 },
3b49e2e9 8344 [NFT_MSG_NEWFLOWTABLE] = {
50f2db9e
PNA		 8345 .call = nf_tables_newflowtable,
8346 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8347 .attr_count = NFTA_FLOWTABLE_MAX,
8348 .policy = nft_flowtable_policy,
8349 },
8350 [NFT_MSG_GETFLOWTABLE] = {
50f2db9e
PNA		 8351 .call = nf_tables_getflowtable,
8352 .type = NFNL_CB_RCU,
3b49e2e9
PNA		 8353 .attr_count = NFTA_FLOWTABLE_MAX,
8354 .policy = nft_flowtable_policy,
8355 },
8356 [NFT_MSG_DELFLOWTABLE] = {
50f2db9e
PNA		 8357 .call = nf_tables_delflowtable,
8358 .type = NFNL_CB_BATCH,
3b49e2e9
PNA		 8359 .attr_count = NFTA_FLOWTABLE_MAX,
8360 .policy = nft_flowtable_policy,
8361 },
96518518
PM		 8362};
8363
a654de8f
PNA		 8364static int nf_tables_validate(struct net *net)
8365{
d59d2f82 8366 struct nftables_pernet *nft_net = nft_pernet(net);
a654de8f
PNA		 8367 struct nft_table *table;
8368
0854db2a 8369 switch (nft_net->validate_state) {
a654de8f
PNA		 8370 case NFT_VALIDATE_SKIP:
8371 break;
8372 case NFT_VALIDATE_NEED:
8373 nft_validate_state_update(net, NFT_VALIDATE_DO);
954d8297 8374 fallthrough;
a654de8f 8375 case NFT_VALIDATE_DO:
0854db2a 8376 list_for_each_entry(table, &nft_net->tables, list) {
a654de8f
PNA		 8377 if (nft_table_validate(net, table) < 0)
8378 return -EAGAIN;
8379 }
8380 break;
8381 }
8382
8383 return 0;
8384}
8385
66293c46
FW		 8386/* a drop policy has to be deferred until all rules have been activated,
8387 * otherwise a large ruleset that contains a drop-policy base chain will
8388 * cause all packets to get dropped until the full transaction has been
8389 * processed.
8390 *
8391 * We defer the drop policy until the transaction has been finalized.
8392 */
8393static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8394{
8395 struct nft_base_chain *basechain;
8396
8397 if (nft_trans_chain_policy(trans) != NF_DROP)
8398 return;
8399
8400 if (!nft_is_base_chain(trans->ctx.chain))
8401 return;
8402
8403 basechain = nft_base_chain(trans->ctx.chain);
8404 basechain->policy = NF_DROP;
8405}
8406
91c7b38d
PNA		 8407static void nft_chain_commit_update(struct nft_trans *trans)
8408{
8409 struct nft_base_chain *basechain;
8410
1b2470e5
FW		 8411 if (nft_trans_chain_name(trans)) {
8412 rhltable_remove(&trans->ctx.table->chains_ht,
8413 &trans->ctx.chain->rhlhead,
8414 nft_chain_ht_params);
d71efb59 8415 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
1b2470e5
FW		 8416 rhltable_insert_key(&trans->ctx.table->chains_ht,
8417 trans->ctx.chain->name,
8418 &trans->ctx.chain->rhlhead,
8419 nft_chain_ht_params);
8420 }
91c7b38d 8421
f323d954 8422 if (!nft_is_base_chain(trans->ctx.chain))
91c7b38d
PNA		 8423 return;
8424
53315ac6
FW		 8425 nft_chain_stats_replace(trans);
8426
91c7b38d 8427 basechain = nft_base_chain(trans->ctx.chain);
91c7b38d
PNA		 8428
8429 switch (nft_trans_chain_policy(trans)) {
8430 case NF_DROP:
8431 case NF_ACCEPT:
8432 basechain->policy = nft_trans_chain_policy(trans);
8433 break;
8434 }
8435}
8436
d62d0ba9
FFM		 8437static void nft_obj_commit_update(struct nft_trans *trans)
8438{
8439 struct nft_object *newobj;
8440 struct nft_object *obj;
8441
8442 obj = nft_trans_obj(trans);
8443 newobj = nft_trans_obj_newobj(trans);
8444
9fedd894
FFM		 8445 if (obj->ops->update)
8446 obj->ops->update(obj, newobj);
d62d0ba9 8447
dad3bdee 8448 nft_obj_destroy(&trans->ctx, newobj);
d62d0ba9
FFM		 8449}
8450
2f99aa31 8451static void nft_commit_release(struct nft_trans *trans)
c7c32e72 8452{
c7c32e72
PNA		 8453 switch (trans->msg_type) {
8454 case NFT_MSG_DELTABLE:
8455 nf_tables_table_destroy(&trans->ctx);
8456 break;
9f8aac0b 8457 case NFT_MSG_NEWCHAIN:
53315ac6 8458 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b
FW		 8459 kfree(nft_trans_chain_name(trans));
8460 break;
c7c32e72 8461 case NFT_MSG_DELCHAIN:
43a605f2 8462 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 8463 break;
8464 case NFT_MSG_DELRULE:
9dd732e0
PNA		 8465 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
8466 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
8467
c7c32e72
PNA		 8468 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8469 break;
8470 case NFT_MSG_DELSET:
0c2a85ed 8471 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 8472 break;
61edafbb 8473 case NFT_MSG_DELSETELEM:
3453c927
PNA		 8474 nf_tables_set_elem_destroy(&trans->ctx,
8475 nft_trans_elem_set(trans),
59105446 8476 nft_trans_elem(trans).priv);
61edafbb 8477 break;
e5009240 8478 case NFT_MSG_DELOBJ:
00bfb320 8479 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 8480 break;
3b49e2e9 8481 case NFT_MSG_DELFLOWTABLE:
abadb2f8
PNA		 8482 if (nft_trans_flowtable_update(trans))
8483 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
8484 else
8485 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 8486 break;
c7c32e72 8487 }
0935d558
FW		 8488
8489 if (trans->put_net)
8490 put_net(trans->ctx.net);
8491
c7c32e72
PNA		 8492 kfree(trans);
8493}
8494
0935d558 8495static void nf_tables_trans_destroy_work(struct work_struct *w)
2f99aa31
FW		 8496{
8497 struct nft_trans *trans, *next;
0935d558
FW		 8498 LIST_HEAD(head);
8499
8500 spin_lock(&nf_tables_destroy_list_lock);
8501 list_splice_init(&nf_tables_destroy_list, &head);
8502 spin_unlock(&nf_tables_destroy_list_lock);
2f99aa31 8503
0935d558 8504 if (list_empty(&head))
2f99aa31
FW		 8505 return;
8506
8507 synchronize_rcu();
8508
0935d558 8509 list_for_each_entry_safe(trans, next, &head, list) {
2f99aa31
FW		 8510 list_del(&trans->list);
8511 nft_commit_release(trans);
8512 }
8513}
8514
ffe8923f
FW		 8515void nf_tables_trans_destroy_flush_work(void)
8516{
8517 flush_work(&trans_destroy_work);
8518}
8519EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
8520
ed5f85d4
PNA		 8521static bool nft_expr_reduce(struct nft_regs_track *track,
8522 const struct nft_expr *expr)
8523{
9e539c5b 8524 return false;
ed5f85d4
PNA		 8525}
8526
0cbc06b3
FW		 8527static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
8528{
2c865a8a 8529 const struct nft_expr *expr, *last;
12e4ecfa 8530 struct nft_regs_track track = {};
2c865a8a
PNA		 8531 unsigned int size, data_size;
8532 void *data, *data_boundary;
8533 struct nft_rule_dp *prule;
0cbc06b3 8534 struct nft_rule *rule;
0cbc06b3
FW		 8535
8536 /* already handled or inactive chain? */
2c865a8a 8537 if (chain->blob_next || !nft_is_active_next(net, chain))
0cbc06b3
FW		 8538 return 0;
8539
63045bfd 8540 data_size = 0;
10377d42 8541 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8542 if (nft_is_active_next(net, rule)) {
8543 data_size += sizeof(*prule) + rule->dlen;
8544 if (data_size > INT_MAX)
8545 return -ENOMEM;
8546 }
0cbc06b3 8547 }
2c865a8a 8548 data_size += offsetof(struct nft_rule_dp, data); /* last rule */
0cbc06b3 8549
2c865a8a
PNA		 8550 chain->blob_next = nf_tables_chain_alloc_rules(data_size);
8551 if (!chain->blob_next)
0cbc06b3
FW		 8552 return -ENOMEM;
8553
2c865a8a
PNA		 8554 data = (void *)chain->blob_next->data;
8555 data_boundary = data + data_size;
8556 size = 0;
8557
10377d42 8558 list_for_each_entry(rule, &chain->rules, list) {
2c865a8a
PNA		 8559 if (!nft_is_active_next(net, rule))
8560 continue;
8561
8562 prule = (struct nft_rule_dp *)data;
8563 data += offsetof(struct nft_rule_dp, data);
8564 if (WARN_ON_ONCE(data > data_boundary))
8565 return -ENOMEM;
8566
12e4ecfa 8567 size = 0;
fe75e84a 8568 track.last = nft_expr_last(rule);
2c865a8a 8569 nft_rule_for_each_expr(expr, last, rule) {
12e4ecfa
PNA		 8570 track.cur = expr;
8571
ed5f85d4 8572 if (nft_expr_reduce(&track, expr)) {
12e4ecfa
PNA		 8573 expr = track.cur;
8574 continue;
8575 }
8576
2c865a8a
PNA		 8577 if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
8578 return -ENOMEM;
8579
8580 memcpy(data + size, expr, expr->ops->size);
8581 size += expr->ops->size;
8582 }
8583 if (WARN_ON_ONCE(size >= 1 << 12))
8584 return -ENOMEM;
8585
8586 prule->handle = rule->handle;
8587 prule->dlen = size;
8588 prule->is_last = 0;
8589
8590 data += size;
8591 size = 0;
8592 chain->blob_next->size += (unsigned long)(data - (void *)prule);
0cbc06b3
FW		 8593 }
8594
2c865a8a
PNA		 8595 prule = (struct nft_rule_dp *)data;
8596 data += offsetof(struct nft_rule_dp, data);
8597 if (WARN_ON_ONCE(data > data_boundary))
8598 return -ENOMEM;
8599
8600 nft_last_rule(chain->blob_next, prule);
8601
0cbc06b3
FW		 8602 return 0;
8603}
8604
8605static void nf_tables_commit_chain_prepare_cancel(struct net *net)
8606{
d59d2f82 8607 struct nftables_pernet *nft_net = nft_pernet(net);
0cbc06b3
FW		 8608 struct nft_trans *trans, *next;
8609
0854db2a 8610 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3
FW		 8611 struct nft_chain *chain = trans->ctx.chain;
8612
8613 if (trans->msg_type == NFT_MSG_NEWRULE ||
8614 trans->msg_type == NFT_MSG_DELRULE) {
2c865a8a
PNA		 8615 kvfree(chain->blob_next);
8616 chain->blob_next = NULL;
0cbc06b3
FW		 8617 }
8618 }
8619}
8620
8621static void __nf_tables_commit_chain_free_rules_old(struct rcu_head *h)
8622{
8623 struct nft_rules_old *o = container_of(h, struct nft_rules_old, h);
8624
2c865a8a 8625 kvfree(o->blob);
0cbc06b3
FW		 8626}
8627
2c865a8a 8628static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
0cbc06b3 8629{
0cbc06b3
FW		 8630 struct nft_rules_old *old;
8631
2c865a8a
PNA		 8632 /* rcu_head is after end marker */
8633 old = (void *)blob + sizeof(*blob) + blob->size;
8634 old->blob = blob;
0cbc06b3
FW		 8635
8636 call_rcu(&old->h, __nf_tables_commit_chain_free_rules_old);
8637}
8638
0fb39bbe 8639static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
0cbc06b3 8640{
2c865a8a 8641 struct nft_rule_blob *g0, *g1;
0cbc06b3
FW		 8642 bool next_genbit;
8643
8644 next_genbit = nft_gencursor_next(net);
8645
2c865a8a 8646 g0 = rcu_dereference_protected(chain->blob_gen_0,
f102d66b 8647 lockdep_commit_lock_is_held(net));
2c865a8a 8648 g1 = rcu_dereference_protected(chain->blob_gen_1,
f102d66b 8649 lockdep_commit_lock_is_held(net));
0cbc06b3
FW		 8650
8651 /* No changes to this chain? */
2c865a8a 8652 if (chain->blob_next == NULL) {
0cbc06b3
FW		 8653 /* chain had no change in last or next generation */
8654 if (g0 == g1)
8655 return;
8656 /*
8657 * chain had no change in this generation; make sure next
8658 * one uses same rules as current generation.
8659 */
8660 if (next_genbit) {
2c865a8a 8661 rcu_assign_pointer(chain->blob_gen_1, g0);
0cbc06b3
FW		 8662 nf_tables_commit_chain_free_rules_old(g1);
8663 } else {
2c865a8a 8664 rcu_assign_pointer(chain->blob_gen_0, g1);
0cbc06b3
FW		 8665 nf_tables_commit_chain_free_rules_old(g0);
8666 }
8667
8668 return;
8669 }
8670
8671 if (next_genbit)
2c865a8a 8672 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
0cbc06b3 8673 else
2c865a8a 8674 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
0cbc06b3 8675
2c865a8a 8676 chain->blob_next = NULL;
0cbc06b3
FW		 8677
8678 if (g0 == g1)
8679 return;
8680
8681 if (next_genbit)
8682 nf_tables_commit_chain_free_rules_old(g1);
8683 else
8684 nf_tables_commit_chain_free_rules_old(g0);
8685}
8686
d152159b
FW		 8687static void nft_obj_del(struct nft_object *obj)
8688{
4d44175a 8689 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
d152159b
FW		 8690 list_del_rcu(&obj->list);
8691}
8692
d0e2c7de 8693void nft_chain_del(struct nft_chain *chain)
1b2470e5
FW		 8694{
8695 struct nft_table *table = chain->table;
8696
8697 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
8698 nft_chain_ht_params));
8699 list_del_rcu(&chain->list);
8700}
8701
eb014de4
PNA		 8702static void nf_tables_module_autoload_cleanup(struct net *net)
8703{
d59d2f82 8704 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 8705 struct nft_module_request *req, *next;
8706
0854db2a
FW		 8707 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
8708 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
eb014de4
PNA		 8709 WARN_ON_ONCE(!req->done);
8710 list_del(&req->list);
8711 kfree(req);
8712 }
8713}
8714
0935d558
FW		 8715static void nf_tables_commit_release(struct net *net)
8716{
d59d2f82 8717 struct nftables_pernet *nft_net = nft_pernet(net);
0935d558
FW		 8718 struct nft_trans *trans;
8719
8720 /* all side effects have to be made visible.
8721 * For example, if a chain named 'foo' has been deleted, a
8722 * new transaction must not find it anymore.
8723 *
8724 * Memory reclaim happens asynchronously from work queue
8725 * to prevent expensive synchronize_rcu() in commit phase.
8726 */
0854db2a 8727 if (list_empty(&nft_net->commit_list)) {
eb014de4 8728 nf_tables_module_autoload_cleanup(net);
0854db2a 8729 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 8730 return;
8731 }
8732
0854db2a 8733 trans = list_last_entry(&nft_net->commit_list,
0935d558
FW		 8734 struct nft_trans, list);
8735 get_net(trans->ctx.net);
8736 WARN_ON_ONCE(trans->put_net);
8737
8738 trans->put_net = true;
8739 spin_lock(&nf_tables_destroy_list_lock);
0854db2a 8740 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
0935d558
FW		 8741 spin_unlock(&nf_tables_destroy_list_lock);
8742
eb014de4 8743 nf_tables_module_autoload_cleanup(net);
0935d558 8744 schedule_work(&trans_destroy_work);
ffe8923f 8745
0854db2a 8746 mutex_unlock(&nft_net->commit_mutex);
0935d558
FW		 8747}
8748
67cc570e
PNA		 8749static void nft_commit_notify(struct net *net, u32 portid)
8750{
d59d2f82 8751 struct nftables_pernet *nft_net = nft_pernet(net);
67cc570e
PNA		 8752 struct sk_buff *batch_skb = NULL, *nskb, *skb;
8753 unsigned char *data;
8754 int len;
8755
0854db2a 8756 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
67cc570e
PNA		 8757 if (!batch_skb) {
8758new_batch:
8759 batch_skb = skb;
8760 len = NLMSG_GOODSIZE - skb->len;
8761 list_del(&skb->list);
8762 continue;
8763 }
8764 len -= skb->len;
8765 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
8766 data = skb_put(batch_skb, skb->len);
8767 memcpy(data, skb->data, skb->len);
8768 list_del(&skb->list);
8769 kfree_skb(skb);
8770 continue;
8771 }
8772 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8773 NFT_CB(batch_skb).report, GFP_KERNEL);
8774 goto new_batch;
8775 }
8776
8777 if (batch_skb) {
8778 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8779 NFT_CB(batch_skb).report, GFP_KERNEL);
8780 }
8781
0854db2a 8782 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
67cc570e
PNA		 8783}
8784
c520292f
RGB		 8785static int nf_tables_commit_audit_alloc(struct list_head *adl,
8786 struct nft_table *table)
8787{
8788 struct nft_audit_data *adp;
8789
8790 list_for_each_entry(adp, adl, list) {
8791 if (adp->table == table)
8792 return 0;
8793 }
8794 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
8795 if (!adp)
8796 return -ENOMEM;
8797 adp->table = table;
8798 list_add(&adp->list, adl);
8799 return 0;
8800}
8801
cfbe3650
DM		 8802static void nf_tables_commit_audit_free(struct list_head *adl)
8803{
8804 struct nft_audit_data *adp, *adn;
8805
8806 list_for_each_entry_safe(adp, adn, adl, list) {
8807 list_del(&adp->list);
8808 kfree(adp);
8809 }
8810}
8811
c520292f
RGB		 8812static void nf_tables_commit_audit_collect(struct list_head *adl,
8813 struct nft_table *table, u32 op)
8814{
8815 struct nft_audit_data *adp;
8816
8817 list_for_each_entry(adp, adl, list) {
8818 if (adp->table == table)
8819 goto found;
8820 }
dadf33c9 8821 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
c520292f
RGB		 8822 return;
8823found:
8824 adp->entries++;
8825 if (!adp->op || adp->op > op)
8826 adp->op = op;
8827}
8828
8829#define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
8830
8831static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
8832{
8833 struct nft_audit_data *adp, *adn;
8834 char aubuf[AUNFTABLENAMELEN];
8835
8836 list_for_each_entry_safe(adp, adn, adl, list) {
8837 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
8838 generation);
8839 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
8840 nft2audit_op[adp->op], GFP_KERNEL);
8841 list_del(&adp->list);
8842 kfree(adp);
8843 }
8844}
8845
5913beaf 8846static int nf_tables_commit(struct net *net, struct sk_buff *skb)
37082f93 8847{
d59d2f82 8848 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 8849 struct nft_trans *trans, *next;
a3716e70 8850 struct nft_trans_elem *te;
0cbc06b3
FW		 8851 struct nft_chain *chain;
8852 struct nft_table *table;
34002783 8853 unsigned int base_seq;
c520292f 8854 LIST_HEAD(adl);
c9626a2c 8855 int err;
37082f93 8856
0854db2a
FW		 8857 if (list_empty(&nft_net->commit_list)) {
8858 mutex_unlock(&nft_net->commit_mutex);
b8b27498
FW		 8859 return 0;
8860 }
8861
a654de8f
PNA		 8862 /* 0. Validate ruleset, otherwise roll back for error reporting. */
8863 if (nf_tables_validate(net) < 0)
8864 return -EAGAIN;
8865
c9626a2c
PNA		 8866 err = nft_flow_rule_offload_commit(net);
8867 if (err < 0)
8868 return err;
8869
0cbc06b3 8870 /* 1. Allocate space for next generation rules_gen_X[] */
0854db2a 8871 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
0cbc06b3 8872 int ret;
37082f93 8873
c520292f
RGB		 8874 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
8875 if (ret) {
8876 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 8877 nf_tables_commit_audit_free(&adl);
c520292f
RGB		 8878 return ret;
8879 }
0cbc06b3
FW		 8880 if (trans->msg_type == NFT_MSG_NEWRULE ||
8881 trans->msg_type == NFT_MSG_DELRULE) {
8882 chain = trans->ctx.chain;
8883
8884 ret = nf_tables_commit_chain_prepare(net, chain);
8885 if (ret < 0) {
8886 nf_tables_commit_chain_prepare_cancel(net);
cfbe3650 8887 nf_tables_commit_audit_free(&adl);
0cbc06b3
FW		 8888 return ret;
8889 }
8890 }
8891 }
37082f93 8892
0cbc06b3 8893 /* step 2. Make rules_gen_X visible to packet path */
0854db2a 8894 list_for_each_entry(table, &nft_net->tables, list) {
0fb39bbe
FW		 8895 list_for_each_entry(chain, &table->chains, list)
8896 nf_tables_commit_chain(net, chain);
0cbc06b3
FW		 8897 }
8898
8899 /*
8900 * Bump generation counter, invalidate any dump in progress.
8901 * Cannot fail after this point.
37082f93 8902 */
34002783
PNA		 8903 base_seq = READ_ONCE(nft_net->base_seq);
8904 while (++base_seq == 0)
0854db2a 8905 ;
0cbc06b3 8906
34002783
PNA		 8907 WRITE_ONCE(nft_net->base_seq, base_seq);
8908
0cbc06b3
FW		 8909 /* step 3. Start new generation, rules_gen_X now in use. */
8910 net->nft.gencursor = nft_gencursor_next(net);
37082f93 8911
0854db2a 8912 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
c520292f
RGB		 8913 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
8914 trans->msg_type);
b380e5c7 8915 switch (trans->msg_type) {
55dd6f93
PNA		 8916 case NFT_MSG_NEWTABLE:
8917 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 8918 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
8919 nft_trans_destroy(trans);
8920 break;
8921 }
8922 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
0ce7cf41
PNA		 8923 nf_tables_table_disable(net, trans->ctx.table);
8924
179d9ba5 8925 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93 8926 } else {
f2a6d766 8927 nft_clear(net, trans->ctx.table);
55dd6f93 8928 }
35151d84 8929 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
55dd6f93
PNA		 8930 nft_trans_destroy(trans);
8931 break;
8932 case NFT_MSG_DELTABLE:
f2a6d766 8933 list_del_rcu(&trans->ctx.table->list);
35151d84 8934 nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE);
55dd6f93 8935 break;
91c7b38d 8936 case NFT_MSG_NEWCHAIN:
9f8aac0b 8937 if (nft_trans_chain_update(trans)) {
91c7b38d 8938 nft_chain_commit_update(trans);
9f8aac0b
FW		 8939 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8940 /* trans destroyed after rcu grace period */
8941 } else {
66293c46 8942 nft_chain_commit_drop_policy(trans);
664b0f8c 8943 nft_clear(net, trans->ctx.chain);
9f8aac0b
FW		 8944 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8945 nft_trans_destroy(trans);
8946 }
91c7b38d
PNA		 8947 break;
8948 case NFT_MSG_DELCHAIN:
1b2470e5 8949 nft_chain_del(trans->ctx.chain);
35151d84 8950 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN);
c974a3a3
PNA		 8951 nf_tables_unregister_hook(trans->ctx.net,
8952 trans->ctx.table,
8953 trans->ctx.chain);
91c7b38d 8954 break;
b380e5c7 8955 case NFT_MSG_NEWRULE:
889f7ee7 8956 nft_clear(trans->ctx.net, nft_trans_rule(trans));
35151d84 8957 nf_tables_rule_notify(&trans->ctx,
37082f93 8958 nft_trans_rule(trans),
35151d84 8959 NFT_MSG_NEWRULE);
9dd732e0
PNA		 8960 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
8961 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
8962
37082f93 8963 nft_trans_destroy(trans);
b380e5c7
PNA		 8964 break;
8965 case NFT_MSG_DELRULE:
8966 list_del_rcu(&nft_trans_rule(trans)->list);
35151d84
PNA		 8967 nf_tables_rule_notify(&trans->ctx,
8968 nft_trans_rule(trans),
8969 NFT_MSG_DELRULE);
f6ac8585
PNA		 8970 nft_rule_expr_deactivate(&trans->ctx,
8971 nft_trans_rule(trans),
8972 NFT_TRANS_COMMIT);
b380e5c7 8973 break;
958bee14 8974 case NFT_MSG_NEWSET:
37a9cc52 8975 nft_clear(net, nft_trans_set(trans));
4fefee57
PNA		 8976 /* This avoids hitting -EBUSY when deleting the table
8977 * from the transaction.
8978 */
408070d6 8979 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
4fefee57
PNA		 8980 !list_empty(&nft_trans_set(trans)->bindings))
8981 trans->ctx.table->use--;
8982
958bee14 8983 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 8984 NFT_MSG_NEWSET, GFP_KERNEL);
958bee14
PNA		 8985 nft_trans_destroy(trans);
8986 break;
8987 case NFT_MSG_DELSET:
37a9cc52 8988 list_del_rcu(&nft_trans_set(trans)->list);
958bee14 8989 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
31f8441c 8990 NFT_MSG_DELSET, GFP_KERNEL);
958bee14 8991 break;
60319eb1 8992 case NFT_MSG_NEWSETELEM:
cc02e457
PM		 8993 te = (struct nft_trans_elem *)trans->data;
8994
aaa31047 8995 nft_setelem_activate(net, te->set, &te->elem);
cc02e457
PM		 8996 nf_tables_setelem_notify(&trans->ctx, te->set,
8997 &te->elem,
6fb721cf 8998 NFT_MSG_NEWSETELEM);
60319eb1
PNA		 8999 nft_trans_destroy(trans);
9000 break;
9001 case NFT_MSG_DELSETELEM:
a3716e70 9002 te = (struct nft_trans_elem *)trans->data;
fe2811eb 9003
a3716e70
PNA		 9004 nf_tables_setelem_notify(&trans->ctx, te->set,
9005 &te->elem,
6fb721cf 9006 NFT_MSG_DELSETELEM);
aaa31047
PNA		 9007 nft_setelem_remove(net, te->set, &te->elem);
9008 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
9009 atomic_dec(&te->set->nelems);
9010 te->set->ndeact--;
9011 }
60319eb1 9012 break;
e5009240 9013 case NFT_MSG_NEWOBJ:
d62d0ba9
FFM		 9014 if (nft_trans_obj_update(trans)) {
9015 nft_obj_commit_update(trans);
9016 nf_tables_obj_notify(&trans->ctx,
9017 nft_trans_obj(trans),
9018 NFT_MSG_NEWOBJ);
9019 } else {
9020 nft_clear(net, nft_trans_obj(trans));
9021 nf_tables_obj_notify(&trans->ctx,
9022 nft_trans_obj(trans),
9023 NFT_MSG_NEWOBJ);
9024 nft_trans_destroy(trans);
9025 }
e5009240
PNA		 9026 break;
9027 case NFT_MSG_DELOBJ:
d152159b 9028 nft_obj_del(nft_trans_obj(trans));
e5009240
PNA		 9029 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
9030 NFT_MSG_DELOBJ);
9031 break;
3b49e2e9 9032 case NFT_MSG_NEWFLOWTABLE:
78d9f48f 9033 if (nft_trans_flowtable_update(trans)) {
7b35582c
PNA		 9034 nft_trans_flowtable(trans)->data.flags =
9035 nft_trans_flowtable_flags(trans);
78d9f48f
PNA		 9036 nf_tables_flowtable_notify(&trans->ctx,
9037 nft_trans_flowtable(trans),
9038 &nft_trans_flowtable_hooks(trans),
9039 NFT_MSG_NEWFLOWTABLE);
9040 list_splice(&nft_trans_flowtable_hooks(trans),
9041 &nft_trans_flowtable(trans)->hook_list);
9042 } else {
9043 nft_clear(net, nft_trans_flowtable(trans));
9044 nf_tables_flowtable_notify(&trans->ctx,
9045 nft_trans_flowtable(trans),
9046 &nft_trans_flowtable(trans)->hook_list,
9047 NFT_MSG_NEWFLOWTABLE);
9048 }
3b49e2e9
PNA		 9049 nft_trans_destroy(trans);
9050 break;
9051 case NFT_MSG_DELFLOWTABLE:
abadb2f8 9052 if (nft_trans_flowtable_update(trans)) {
abadb2f8
PNA		 9053 nf_tables_flowtable_notify(&trans->ctx,
9054 nft_trans_flowtable(trans),
9055 &nft_trans_flowtable_hooks(trans),
9056 NFT_MSG_DELFLOWTABLE);
9057 nft_unregister_flowtable_net_hooks(net,
9058 &nft_trans_flowtable_hooks(trans));
9059 } else {
9060 list_del_rcu(&nft_trans_flowtable(trans)->list);
9061 nf_tables_flowtable_notify(&trans->ctx,
9062 nft_trans_flowtable(trans),
9063 &nft_trans_flowtable(trans)->hook_list,
9064 NFT_MSG_DELFLOWTABLE);
9065 nft_unregister_flowtable_net_hooks(net,
9066 &nft_trans_flowtable(trans)->hook_list);
9067 }
3b49e2e9 9068 break;
37082f93 9069 }
37082f93
PNA		 9070 }
9071
67cc570e 9072 nft_commit_notify(net, NETLINK_CB(skb).portid);
84d7fce6 9073 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
0854db2a 9074 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
0935d558 9075 nf_tables_commit_release(net);
37082f93
PNA		 9076
9077 return 0;
9078}
9079
eb014de4
PNA		 9080static void nf_tables_module_autoload(struct net *net)
9081{
d59d2f82 9082 struct nftables_pernet *nft_net = nft_pernet(net);
eb014de4
PNA		 9083 struct nft_module_request *req, *next;
9084 LIST_HEAD(module_list);
9085
0854db2a
FW		 9086 list_splice_init(&nft_net->module_list, &module_list);
9087 mutex_unlock(&nft_net->commit_mutex);
eb014de4 9088 list_for_each_entry_safe(req, next, &module_list, list) {
1d305ba4
FW		 9089 request_module("%s", req->module);
9090 req->done = true;
eb014de4 9091 }
0854db2a
FW		 9092 mutex_lock(&nft_net->commit_mutex);
9093 list_splice(&module_list, &nft_net->module_list);
eb014de4
PNA		 9094}
9095
b326dd37 9096static void nf_tables_abort_release(struct nft_trans *trans)
c7c32e72 9097{
c7c32e72
PNA		 9098 switch (trans->msg_type) {
9099 case NFT_MSG_NEWTABLE:
9100 nf_tables_table_destroy(&trans->ctx);
9101 break;
9102 case NFT_MSG_NEWCHAIN:
43a605f2 9103 nf_tables_chain_destroy(&trans->ctx);
c7c32e72
PNA		 9104 break;
9105 case NFT_MSG_NEWRULE:
9106 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9107 break;
9108 case NFT_MSG_NEWSET:
0c2a85ed 9109 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
c7c32e72 9110 break;
61edafbb
PM		 9111 case NFT_MSG_NEWSETELEM:
9112 nft_set_elem_destroy(nft_trans_elem_set(trans),
61f9e292 9113 nft_trans_elem(trans).priv, true);
61edafbb 9114 break;
e5009240 9115 case NFT_MSG_NEWOBJ:
00bfb320 9116 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
e5009240 9117 break;
3b49e2e9 9118 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9119 if (nft_trans_flowtable_update(trans))
9120 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
9121 else
9122 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
3b49e2e9 9123 break;
c7c32e72
PNA		 9124 }
9125 kfree(trans);
9126}
9127
c0391b6a 9128static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
37082f93 9129{
d59d2f82 9130 struct nftables_pernet *nft_net = nft_pernet(net);
37082f93 9131 struct nft_trans *trans, *next;
02263db0 9132 struct nft_trans_elem *te;
37082f93 9133
c0391b6a
PNA		 9134 if (action == NFNL_ABORT_VALIDATE &&
9135 nf_tables_validate(net) < 0)
9136 return -EAGAIN;
9137
0854db2a 9138 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
a907e36d 9139 list) {
b380e5c7 9140 switch (trans->msg_type) {
55dd6f93
PNA		 9141 case NFT_MSG_NEWTABLE:
9142 if (nft_trans_table_update(trans)) {
179d9ba5
PNA		 9143 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
9144 nft_trans_destroy(trans);
9145 break;
9146 }
9147 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
0ce7cf41 9148 nf_tables_table_disable(net, trans->ctx.table);
179d9ba5
PNA		 9149 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
9150 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
9151 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
9152 }
9153 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
55dd6f93
PNA		 9154 nft_trans_destroy(trans);
9155 } else {
e688a7f8 9156 list_del_rcu(&trans->ctx.table->list);
55dd6f93
PNA		 9157 }
9158 break;
9159 case NFT_MSG_DELTABLE:
f2a6d766 9160 nft_clear(trans->ctx.net, trans->ctx.table);
55dd6f93
PNA		 9161 nft_trans_destroy(trans);
9162 break;
91c7b38d
PNA		 9163 case NFT_MSG_NEWCHAIN:
9164 if (nft_trans_chain_update(trans)) {
982f4051 9165 free_percpu(nft_trans_chain_stats(trans));
9f8aac0b 9166 kfree(nft_trans_chain_name(trans));
91c7b38d
PNA		 9167 nft_trans_destroy(trans);
9168 } else {
d0e2c7de
PNA		 9169 if (nft_chain_is_bound(trans->ctx.chain)) {
9170 nft_trans_destroy(trans);
9171 break;
9172 }
4fefee57 9173 trans->ctx.table->use--;
1b2470e5 9174 nft_chain_del(trans->ctx.chain);
c974a3a3
PNA		 9175 nf_tables_unregister_hook(trans->ctx.net,
9176 trans->ctx.table,
9177 trans->ctx.chain);
91c7b38d
PNA		 9178 }
9179 break;
9180 case NFT_MSG_DELCHAIN:
4fefee57 9181 trans->ctx.table->use++;
664b0f8c 9182 nft_clear(trans->ctx.net, trans->ctx.chain);
91c7b38d
PNA		 9183 nft_trans_destroy(trans);
9184 break;
b380e5c7 9185 case NFT_MSG_NEWRULE:
4fefee57 9186 trans->ctx.chain->use--;
b380e5c7 9187 list_del_rcu(&nft_trans_rule(trans)->list);
f6ac8585
PNA		 9188 nft_rule_expr_deactivate(&trans->ctx,
9189 nft_trans_rule(trans),
9190 NFT_TRANS_ABORT);
3c5e4462
PNA		 9191 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9192 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
b380e5c7
PNA		 9193 break;
9194 case NFT_MSG_DELRULE:
4fefee57 9195 trans->ctx.chain->use++;
889f7ee7 9196 nft_clear(trans->ctx.net, nft_trans_rule(trans));
bb7b40ae 9197 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
3c5e4462
PNA		 9198 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
9199 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
9200
37082f93 9201 nft_trans_destroy(trans);
b380e5c7 9202 break;
958bee14 9203 case NFT_MSG_NEWSET:
4fefee57 9204 trans->ctx.table->use--;
6a0a8d10 9205 if (nft_trans_set_bound(trans)) {
40ba1d9b
PNA		 9206 nft_trans_destroy(trans);
9207 break;
9208 }
9209 list_del_rcu(&nft_trans_set(trans)->list);
958bee14
PNA		 9210 break;
9211 case NFT_MSG_DELSET:
4fefee57 9212 trans->ctx.table->use++;
37a9cc52 9213 nft_clear(trans->ctx.net, nft_trans_set(trans));
958bee14
PNA		 9214 nft_trans_destroy(trans);
9215 break;
60319eb1 9216 case NFT_MSG_NEWSETELEM:
6a0a8d10 9217 if (nft_trans_elem_set_bound(trans)) {
40ba1d9b
PNA		 9218 nft_trans_destroy(trans);
9219 break;
9220 }
02263db0 9221 te = (struct nft_trans_elem *)trans->data;
aaa31047
PNA		 9222 nft_setelem_remove(net, te->set, &te->elem);
9223 if (!nft_setelem_is_catchall(te->set, &te->elem))
9224 atomic_dec(&te->set->nelems);
60319eb1
PNA		 9225 break;
9226 case NFT_MSG_DELSETELEM:
cc02e457
PM		 9227 te = (struct nft_trans_elem *)trans->data;
9228
f8bb7889 9229 nft_setelem_data_activate(net, te->set, &te->elem);
aaa31047
PNA		 9230 nft_setelem_activate(net, te->set, &te->elem);
9231 if (!nft_setelem_is_catchall(te->set, &te->elem))
9232 te->set->ndeact--;
cc02e457 9233
e5009240
PNA		 9234 nft_trans_destroy(trans);
9235 break;
9236 case NFT_MSG_NEWOBJ:
d62d0ba9 9237 if (nft_trans_obj_update(trans)) {
dad3bdee 9238 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
d62d0ba9
FFM		 9239 nft_trans_destroy(trans);
9240 } else {
9241 trans->ctx.table->use--;
9242 nft_obj_del(nft_trans_obj(trans));
9243 }
e5009240
PNA		 9244 break;
9245 case NFT_MSG_DELOBJ:
9246 trans->ctx.table->use++;
9247 nft_clear(trans->ctx.net, nft_trans_obj(trans));
60319eb1
PNA		 9248 nft_trans_destroy(trans);
9249 break;
3b49e2e9 9250 case NFT_MSG_NEWFLOWTABLE:
78d9f48f
PNA		 9251 if (nft_trans_flowtable_update(trans)) {
9252 nft_unregister_flowtable_net_hooks(net,
9253 &nft_trans_flowtable_hooks(trans));
9254 } else {
9255 trans->ctx.table->use--;
9256 list_del_rcu(&nft_trans_flowtable(trans)->list);
9257 nft_unregister_flowtable_net_hooks(net,
9258 &nft_trans_flowtable(trans)->hook_list);
9259 }
3b49e2e9
PNA		 9260 break;
9261 case NFT_MSG_DELFLOWTABLE:
abadb2f8 9262 if (nft_trans_flowtable_update(trans)) {
b6d9014a
PNA		 9263 list_splice(&nft_trans_flowtable_hooks(trans),
9264 &nft_trans_flowtable(trans)->hook_list);
abadb2f8
PNA		 9265 } else {
9266 trans->ctx.table->use++;
9267 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9268 }
3b49e2e9
PNA		 9269 nft_trans_destroy(trans);
9270 break;
37082f93 9271 }
37082f93
PNA		 9272 }
9273
b326dd37
PNA		 9274 synchronize_rcu();
9275
a1cee076 9276 list_for_each_entry_safe_reverse(trans, next,
0854db2a 9277 &nft_net->commit_list, list) {
c7c32e72 9278 list_del(&trans->list);
b326dd37 9279 nf_tables_abort_release(trans);
37082f93
PNA		 9280 }
9281
c0391b6a 9282 if (action == NFNL_ABORT_AUTOLOAD)
eb014de4
PNA		 9283 nf_tables_module_autoload(net);
9284 else
9285 nf_tables_module_autoload_cleanup(net);
9286
37082f93
PNA		 9287 return 0;
9288}
9289
a654de8f
PNA		 9290static void nf_tables_cleanup(struct net *net)
9291{
9292 nft_validate_state_update(net, NFT_VALIDATE_SKIP);
9293}
9294
c0391b6a
PNA		 9295static int nf_tables_abort(struct net *net, struct sk_buff *skb,
9296 enum nfnl_abort_action action)
71ad00c5 9297{
d59d2f82 9298 struct nftables_pernet *nft_net = nft_pernet(net);
c0391b6a 9299 int ret = __nf_tables_abort(net, action);
f102d66b 9300
0854db2a 9301 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9302
9303 return ret;
71ad00c5
FW		 9304}
9305
74e8bcd2
PNA		 9306static bool nf_tables_valid_genid(struct net *net, u32 genid)
9307{
d59d2f82 9308 struct nftables_pernet *nft_net = nft_pernet(net);
f102d66b
FW		 9309 bool genid_ok;
9310
0854db2a 9311 mutex_lock(&nft_net->commit_mutex);
f102d66b 9312
0854db2a 9313 genid_ok = genid == 0 || nft_net->base_seq == genid;
f102d66b 9314 if (!genid_ok)
0854db2a 9315 mutex_unlock(&nft_net->commit_mutex);
f102d66b
FW		 9316
9317 /* else, commit mutex has to be released by commit or abort function */
9318 return genid_ok;
74e8bcd2
PNA		 9319}
9320
96518518
PM		 9321static const struct nfnetlink_subsystem nf_tables_subsys = {
9322 .name = "nf_tables",
9323 .subsys_id = NFNL_SUBSYS_NFTABLES,
9324 .cb_count = NFT_MSG_MAX,
9325 .cb = nf_tables_cb,
0628b123
PNA		 9326 .commit = nf_tables_commit,
9327 .abort = nf_tables_abort,
a654de8f 9328 .cleanup = nf_tables_cleanup,
74e8bcd2 9329 .valid_genid = nf_tables_valid_genid,
be2ab5b4 9330 .owner = THIS_MODULE,
96518518
PM		 9331};
9332
7210e4e3 9333int nft_chain_validate_dependency(const struct nft_chain *chain,
32537e91 9334 enum nft_chain_types type)
7210e4e3
PNA		 9335{
9336 const struct nft_base_chain *basechain;
9337
f323d954 9338 if (nft_is_base_chain(chain)) {
7210e4e3
PNA		 9339 basechain = nft_base_chain(chain);
9340 if (basechain->type->type != type)
9341 return -EOPNOTSUPP;
9342 }
9343 return 0;
9344}
9345EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
9346
75e8d06d
PNA		 9347int nft_chain_validate_hooks(const struct nft_chain *chain,
9348 unsigned int hook_flags)
9349{
9350 struct nft_base_chain *basechain;
9351
f323d954 9352 if (nft_is_base_chain(chain)) {
75e8d06d
PNA		 9353 basechain = nft_base_chain(chain);
9354
c974a3a3 9355 if ((1 << basechain->ops.hooknum) & hook_flags)
75e8d06d
PNA		 9356 return 0;
9357
9358 return -EOPNOTSUPP;
9359 }
9360
9361 return 0;
9362}
9363EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
9364
20a69341
PM		 9365/*
9366 * Loop detection - walk through the ruleset beginning at the destination chain
9367 * of a new jump until either the source chain is reached (loop) or all
9368 * reachable chains have been traversed.
9369 *
9370 * The loop check is performed whenever a new jump verdict is added to an
9371 * expression or verdict map or a verdict map is bound to a new chain.
9372 */
9373
9374static int nf_tables_check_loops(const struct nft_ctx *ctx,
9375 const struct nft_chain *chain);
9376
6387aa6e
PNA		 9377static int nft_check_loops(const struct nft_ctx *ctx,
9378 const struct nft_set_ext *ext)
9379{
9380 const struct nft_data *data;
9381 int ret;
9382
9383 data = nft_set_ext_data(ext);
9384 switch (data->verdict.code) {
9385 case NFT_JUMP:
9386 case NFT_GOTO:
9387 ret = nf_tables_check_loops(ctx, data->verdict.chain);
9388 break;
9389 default:
9390 ret = 0;
9391 break;
9392 }
9393
9394 return ret;
9395}
9396
20a69341 9397static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
de70185d 9398 struct nft_set *set,
20a69341 9399 const struct nft_set_iter *iter,
de70185d 9400 struct nft_set_elem *elem)
20a69341 9401{
fe2811eb 9402 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
fe2811eb
PM		 9403
9404 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
9405 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
62f9c8b4
PNA		 9406 return 0;
9407
6387aa6e 9408 return nft_check_loops(ctx, ext);
20a69341
PM		 9409}
9410
aaa31047
PNA		 9411static int nft_set_catchall_loops(const struct nft_ctx *ctx,
9412 struct nft_set *set)
9413{
9414 u8 genmask = nft_genmask_next(ctx->net);
9415 struct nft_set_elem_catchall *catchall;
9416 struct nft_set_ext *ext;
9417 int ret = 0;
9418
9419 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9420 ext = nft_set_elem_ext(set, catchall->elem);
9421 if (!nft_set_elem_active(ext, genmask))
9422 continue;
9423
9424 ret = nft_check_loops(ctx, ext);
9425 if (ret < 0)
9426 return ret;
9427 }
9428
9429 return ret;
9430}
9431
20a69341
PM		 9432static int nf_tables_check_loops(const struct nft_ctx *ctx,
9433 const struct nft_chain *chain)
9434{
9435 const struct nft_rule *rule;
9436 const struct nft_expr *expr, *last;
de70185d 9437 struct nft_set *set;
20a69341
PM		 9438 struct nft_set_binding *binding;
9439 struct nft_set_iter iter;
20a69341
PM		 9440
9441 if (ctx->chain == chain)
9442 return -ELOOP;
9443
9444 list_for_each_entry(rule, &chain->rules, list) {
9445 nft_rule_for_each_expr(expr, last, rule) {
a654de8f
PNA		 9446 struct nft_immediate_expr *priv;
9447 const struct nft_data *data;
0ca743a5
PNA		 9448 int err;
9449
a654de8f 9450 if (strcmp(expr->ops->type->name, "immediate"))
20a69341
PM		 9451 continue;
9452
a654de8f
PNA		 9453 priv = nft_expr_priv(expr);
9454 if (priv->dreg != NFT_REG_VERDICT)
0ca743a5 9455 continue;
20a69341 9456
a654de8f 9457 data = &priv->data;
1ca2e170 9458 switch (data->verdict.code) {
20a69341
PM		 9459 case NFT_JUMP:
9460 case NFT_GOTO:
1ca2e170
PM		 9461 err = nf_tables_check_loops(ctx,
9462 data->verdict.chain);
20a69341
PM		 9463 if (err < 0)
9464 return err;
c2168e6b 9465 break;
20a69341
PM		 9466 default:
9467 break;
9468 }
9469 }
9470 }
9471
9472 list_for_each_entry(set, &ctx->table->sets, list) {
37a9cc52
PNA		 9473 if (!nft_is_active_next(ctx->net, set))
9474 continue;
20a69341
PM		 9475 if (!(set->flags & NFT_SET_MAP) ||
9476 set->dtype != NFT_DATA_VERDICT)
9477 continue;
9478
9479 list_for_each_entry(binding, &set->bindings, list) {
11113e19
PM		 9480 if (!(binding->flags & NFT_SET_MAP) ||
9481 binding->chain != chain)
20a69341
PM		 9482 continue;
9483
8588ac09 9484 iter.genmask = nft_genmask_next(ctx->net);
20a69341
PM		 9485 iter.skip = 0;
9486 iter.count = 0;
9487 iter.err = 0;
9488 iter.fn = nf_tables_loop_check_setelem;
9489
9490 set->ops->walk(ctx, set, &iter);
aaa31047
PNA		 9491 if (!iter.err)
9492 iter.err = nft_set_catchall_loops(ctx, set);
9493
20a69341
PM		 9494 if (iter.err < 0)
9495 return iter.err;
9496 }
9497 }
9498
9499 return 0;
9500}
9501
36b701fa
LGL		 9502/**
9503 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
9504 *
9505 * @attr: netlink attribute to fetch value from
9506 * @max: maximum value to be stored in dest
9507 * @dest: pointer to the variable
9508 *
9509 * Parse, check and store a given u32 netlink attribute into variable.
9510 * This function returns -ERANGE if the value goes over maximum value.
9511 * Otherwise a 0 is returned and the attribute value is stored in the
9512 * destination variable.
9513 */
f1d505bb 9514int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
36b701fa 9515{
09525a09 9516 u32 val;
36b701fa
LGL		 9517
9518 val = ntohl(nla_get_be32(attr));
9519 if (val > max)
9520 return -ERANGE;
9521
9522 *dest = val;
9523 return 0;
9524}
9525EXPORT_SYMBOL_GPL(nft_parse_u32_check);
9526
6c6f9f31 9527static int nft_parse_register(const struct nlattr *attr, u32 *preg)
b1c96ed3 9528{
49499c3e
PM		 9529 unsigned int reg;
9530
9531 reg = ntohl(nla_get_be32(attr));
9532 switch (reg) {
9533 case NFT_REG_VERDICT...NFT_REG_4:
6e1acfa3
PNA		 9534 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
9535 break;
9536 case NFT_REG32_00...NFT_REG32_15:
9537 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
9538 break;
49499c3e 9539 default:
6e1acfa3 9540 return -ERANGE;
49499c3e 9541 }
6e1acfa3
PNA		 9542
9543 return 0;
b1c96ed3 9544}
b1c96ed3 9545
49499c3e
PM		 9546/**
9547 * nft_dump_register - dump a register value to a netlink attribute
9548 *
9549 * @skb: socket buffer
9550 * @attr: attribute number
9551 * @reg: register number
9552 *
9553 * Construct a netlink attribute containing the register number. For
9554 * compatibility reasons, register numbers being a multiple of 4 are
9555 * translated to the corresponding 128 bit register numbers.
9556 */
b1c96ed3
PM		 9557int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
9558{
49499c3e
PM		 9559 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
9560 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
9561 else
9562 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
9563
b1c96ed3
PM		 9564 return nla_put_be32(skb, attr, htonl(reg));
9565}
9566EXPORT_SYMBOL_GPL(nft_dump_register);
9567
4f16d25c 9568static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
96518518 9569{
49499c3e 9570 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
96518518 9571 return -EINVAL;
d07db988
PM		 9572 if (len == 0)
9573 return -EINVAL;
c593642c 9574 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
d07db988 9575 return -ERANGE;
49499c3e 9576
96518518
PM		 9577 return 0;
9578}
4f16d25c
PNA		 9579
9580int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
9581{
9582 u32 reg;
9583 int err;
9584
6e1acfa3
PNA		 9585 err = nft_parse_register(attr, &reg);
9586 if (err < 0)
9587 return err;
9588
4f16d25c
PNA		 9589 err = nft_validate_register_load(reg, len);
9590 if (err < 0)
9591 return err;
9592
9593 *sreg = reg;
9594 return 0;
9595}
9596EXPORT_SYMBOL_GPL(nft_parse_register_load);
96518518 9597
345023b0
PNA		 9598static int nft_validate_register_store(const struct nft_ctx *ctx,
9599 enum nft_registers reg,
9600 const struct nft_data *data,
9601 enum nft_data_types type,
9602 unsigned int len)
96518518 9603{
20a69341
PM		 9604 int err;
9605
96518518
PM		 9606 switch (reg) {
9607 case NFT_REG_VERDICT:
58f40ab6 9608 if (type != NFT_DATA_VERDICT)
96518518 9609 return -EINVAL;
20a69341 9610
58f40ab6 9611 if (data != NULL &&
1ca2e170
PM		 9612 (data->verdict.code == NFT_GOTO ||
9613 data->verdict.code == NFT_JUMP)) {
9614 err = nf_tables_check_loops(ctx, data->verdict.chain);
20a69341
PM		 9615 if (err < 0)
9616 return err;
20a69341
PM		 9617 }
9618
96518518
PM		 9619 return 0;
9620 default:
49499c3e 9621 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
27e6d201 9622 return -EINVAL;
45d9bcda
PM		 9623 if (len == 0)
9624 return -EINVAL;
49499c3e 9625 if (reg * NFT_REG32_SIZE + len >
c593642c 9626 sizeof_field(struct nft_regs, data))
45d9bcda 9627 return -ERANGE;
27e6d201 9628
96518518
PM		 9629 if (data != NULL && type != NFT_DATA_VALUE)
9630 return -EINVAL;
9631 return 0;
9632 }
9633}
345023b0
PNA		 9634
9635int nft_parse_register_store(const struct nft_ctx *ctx,
9636 const struct nlattr *attr, u8 *dreg,
9637 const struct nft_data *data,
9638 enum nft_data_types type, unsigned int len)
9639{
9640 int err;
9641 u32 reg;
9642
6e1acfa3
PNA		 9643 err = nft_parse_register(attr, &reg);
9644 if (err < 0)
9645 return err;
9646
345023b0
PNA		 9647 err = nft_validate_register_store(ctx, reg, data, type, len);
9648 if (err < 0)
9649 return err;
9650
9651 *dreg = reg;
9652 return 0;
9653}
9654EXPORT_SYMBOL_GPL(nft_parse_register_store);
96518518
PM		 9655
9656static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
9657 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
9658 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
9659 .len = NFT_CHAIN_MAXNAMELEN - 1 },
51d70f18 9660 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
96518518
PM		 9661};
9662
9663static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
9664 struct nft_data_desc *desc, const struct nlattr *nla)
9665{
664b0f8c 9666 u8 genmask = nft_genmask_next(ctx->net);
96518518
PM		 9667 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
9668 struct nft_chain *chain;
9669 int err;
9670
8cb08174
JB		 9671 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
9672 nft_verdict_policy, NULL);
96518518
PM		 9673 if (err < 0)
9674 return err;
9675
9676 if (!tb[NFTA_VERDICT_CODE])
9677 return -EINVAL;
1ca2e170 9678 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
96518518 9679
1ca2e170 9680 switch (data->verdict.code) {
e0abdadc 9681 default:
1ca2e170 9682 switch (data->verdict.code & NF_VERDICT_MASK) {
e0abdadc
PM		 9683 case NF_ACCEPT:
9684 case NF_DROP:
9685 case NF_QUEUE:
9686 break;
9687 default:
9688 return -EINVAL;
9689 }
954d8297 9690 fallthrough;
96518518
PM		 9691 case NFT_CONTINUE:
9692 case NFT_BREAK:
9693 case NFT_RETURN:
96518518
PM		 9694 break;
9695 case NFT_JUMP:
9696 case NFT_GOTO:
51d70f18
PNA		 9697 if (tb[NFTA_VERDICT_CHAIN]) {
9698 chain = nft_chain_lookup(ctx->net, ctx->table,
9699 tb[NFTA_VERDICT_CHAIN],
9700 genmask);
9701 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
95f466d2 9702 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
51d70f18
PNA		 9703 tb[NFTA_VERDICT_CHAIN_ID]);
9704 if (IS_ERR(chain))
9705 return PTR_ERR(chain);
9706 } else {
96518518 9707 return -EINVAL;
51d70f18
PNA		 9708 }
9709
96518518
PM		 9710 if (IS_ERR(chain))
9711 return PTR_ERR(chain);
f323d954 9712 if (nft_is_base_chain(chain))
96518518 9713 return -EOPNOTSUPP;
f323ef3a
PNA		 9714 if (desc->flags & NFT_DATA_DESC_SETELEM &&
9715 chain->flags & NFT_CHAIN_BINDING)
9716 return -EINVAL;
96518518 9717
96518518 9718 chain->use++;
1ca2e170 9719 data->verdict.chain = chain;
96518518 9720 break;
96518518
PM		 9721 }
9722
4c4ed074 9723 desc->len = sizeof(data->verdict);
341b6941 9724
96518518
PM		 9725 return 0;
9726}
9727
9728static void nft_verdict_uninit(const struct nft_data *data)
9729{
d0e2c7de
PNA		 9730 struct nft_chain *chain;
9731 struct nft_rule *rule;
9732
1ca2e170 9733 switch (data->verdict.code) {
96518518
PM		 9734 case NFT_JUMP:
9735 case NFT_GOTO:
d0e2c7de
PNA		 9736 chain = data->verdict.chain;
9737 chain->use--;
9738
9739 if (!nft_chain_is_bound(chain))
9740 break;
9741
9742 chain->table->use--;
9743 list_for_each_entry(rule, &chain->rules, list)
9744 chain->use--;
9745
9746 nft_chain_del(chain);
96518518
PM		 9747 break;
9748 }
9749}
9750
33d5a7b1 9751int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
96518518
PM		 9752{
9753 struct nlattr *nest;
9754
ae0be8de 9755 nest = nla_nest_start_noflag(skb, type);
96518518
PM		 9756 if (!nest)
9757 goto nla_put_failure;
9758
33d5a7b1 9759 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
96518518
PM		 9760 goto nla_put_failure;
9761
33d5a7b1 9762 switch (v->code) {
96518518
PM		 9763 case NFT_JUMP:
9764 case NFT_GOTO:
1ca2e170 9765 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
33d5a7b1 9766 v->chain->name))
96518518
PM		 9767 goto nla_put_failure;
9768 }
9769 nla_nest_end(skb, nest);
9770 return 0;
9771
9772nla_put_failure:
9773 return -1;
9774}
9775
d0a11fc3 9776static int nft_value_init(const struct nft_ctx *ctx,
341b6941
PNA		 9777 struct nft_data *data, struct nft_data_desc *desc,
9778 const struct nlattr *nla)
96518518
PM		 9779{
9780 unsigned int len;
9781
9782 len = nla_len(nla);
9783 if (len == 0)
9784 return -EINVAL;
341b6941 9785 if (len > desc->size)
96518518 9786 return -EOVERFLOW;
341b6941
PNA		 9787 if (desc->len) {
9788 if (len != desc->len)
9789 return -EINVAL;
9790 } else {
9791 desc->len = len;
9792 }
96518518 9793
d0a11fc3 9794 nla_memcpy(data->data, nla, len);
341b6941 9795
96518518
PM		 9796 return 0;
9797}
9798
9799static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
9800 unsigned int len)
9801{
9802 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
9803}
9804
9805static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
d0a11fc3 9806 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
96518518
PM		 9807 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
9808};
9809
9810/**
9811 * nft_data_init - parse nf_tables data netlink attributes
9812 *
9813 * @ctx: context of the expression using the data
9814 * @data: destination struct nft_data
9815 * @desc: data description
9816 * @nla: netlink attribute containing data
9817 *
9818 * Parse the netlink data attributes and initialize a struct nft_data.
9819 * The type and length of data are returned in the data description.
9820 *
9821 * The caller can indicate that it only wants to accept data of type
9822 * NFT_DATA_VALUE by passing NULL for the ctx argument.
9823 */
341b6941 9824int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
96518518
PM		 9825 struct nft_data_desc *desc, const struct nlattr *nla)
9826{
9827 struct nlattr *tb[NFTA_DATA_MAX + 1];
9828 int err;
9829
341b6941
PNA		 9830 if (WARN_ON_ONCE(!desc->size))
9831 return -EINVAL;
9832
8cb08174
JB		 9833 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
9834 nft_data_policy, NULL);
96518518
PM		 9835 if (err < 0)
9836 return err;
9837
341b6941
PNA		 9838 if (tb[NFTA_DATA_VALUE]) {
9839 if (desc->type != NFT_DATA_VALUE)
9840 return -EINVAL;
9841
9842 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
9843 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
9844 if (desc->type != NFT_DATA_VERDICT)
9845 return -EINVAL;
9846
9847 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
9848 } else {
9849 err = -EINVAL;
9850 }
9851
9852 return err;
96518518
PM		 9853}
9854EXPORT_SYMBOL_GPL(nft_data_init);
9855
9856/**
59105446 9857 * nft_data_release - release a nft_data item
96518518
PM		 9858 *
9859 * @data: struct nft_data to release
9860 * @type: type of data
9861 *
9862 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
9863 * all others need to be released by calling this function.
9864 */
59105446 9865void nft_data_release(const struct nft_data *data, enum nft_data_types type)
96518518 9866{
960bd2c2 9867 if (type < NFT_DATA_VERDICT)
96518518 9868 return;
960bd2c2 9869 switch (type) {
96518518
PM		 9870 case NFT_DATA_VERDICT:
9871 return nft_verdict_uninit(data);
9872 default:
9873 WARN_ON(1);
9874 }
9875}
59105446 9876EXPORT_SYMBOL_GPL(nft_data_release);
96518518
PM		 9877
9878int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
9879 enum nft_data_types type, unsigned int len)
9880{
9881 struct nlattr *nest;
9882 int err;
9883
ae0be8de 9884 nest = nla_nest_start_noflag(skb, attr);
96518518
PM		 9885 if (nest == NULL)
9886 return -1;
9887
9888 switch (type) {
9889 case NFT_DATA_VALUE:
9890 err = nft_value_dump(skb, data, len);
9891 break;
9892 case NFT_DATA_VERDICT:
33d5a7b1 9893 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
96518518
PM		 9894 break;
9895 default:
9896 err = -EINVAL;
9897 WARN_ON(1);
9898 }
9899
9900 nla_nest_end(skb, nest);
9901 return err;
9902}
9903EXPORT_SYMBOL_GPL(nft_data_dump);
9904
5ebe0b0e
PNA		 9905int __nft_release_basechain(struct nft_ctx *ctx)
9906{
9907 struct nft_rule *rule, *nr;
9908
fa5950e4
FW		 9909 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
9910 return 0;
5ebe0b0e 9911
c974a3a3 9912 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
5ebe0b0e
PNA		 9913 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
9914 list_del(&rule->list);
9915 ctx->chain->use--;
bb7b40ae 9916 nf_tables_rule_release(ctx, rule);
5ebe0b0e 9917 }
1b2470e5 9918 nft_chain_del(ctx->chain);
5ebe0b0e 9919 ctx->table->use--;
43a605f2 9920 nf_tables_chain_destroy(ctx);
5ebe0b0e
PNA		 9921
9922 return 0;
9923}
9924EXPORT_SYMBOL_GPL(__nft_release_basechain);
9925
00dfe9be
PNA		 9926static void __nft_release_hook(struct net *net, struct nft_table *table)
9927{
6069da44 9928 struct nft_flowtable *flowtable;
00dfe9be
PNA		 9929 struct nft_chain *chain;
9930
9931 list_for_each_entry(chain, &table->chains, list)
f9a43007 9932 __nf_tables_unregister_hook(net, table, chain, true);
6069da44 9933 list_for_each_entry(flowtable, &table->flowtables, list)
f9a43007
PNA		 9934 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
9935 true);
00dfe9be
PNA		 9936}
9937
767d1216
PNA		 9938static void __nft_release_hooks(struct net *net)
9939{
d59d2f82 9940 struct nftables_pernet *nft_net = nft_pernet(net);
767d1216 9941 struct nft_table *table;
767d1216 9942
0854db2a 9943 list_for_each_entry(table, &nft_net->tables, list) {
2888b080
PNA		 9944 if (nft_table_has_owner(table))
9945 continue;
9946
00dfe9be 9947 __nft_release_hook(net, table);
2888b080 9948 }
767d1216
PNA		 9949}
9950
fd020332 9951static void __nft_release_table(struct net *net, struct nft_table *table)
df05ef87 9952{
3b49e2e9 9953 struct nft_flowtable *flowtable, *nf;
df05ef87 9954 struct nft_chain *chain, *nc;
e5009240 9955 struct nft_object *obj, *ne;
df05ef87
PNA		 9956 struct nft_rule *rule, *nr;
9957 struct nft_set *set, *ns;
9958 struct nft_ctx ctx = {
9959 .net = net,
43a605f2 9960 .family = NFPROTO_NETDEV,
df05ef87
PNA		 9961 };
9962
fd020332
PNA		 9963 ctx.family = table->family;
9964 ctx.table = table;
9965 list_for_each_entry(chain, &table->chains, list) {
9966 ctx.chain = chain;
9967 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
9968 list_del(&rule->list);
9969 chain->use--;
9970 nf_tables_rule_release(&ctx, rule);
df05ef87 9971 }
df05ef87 9972 }
fd020332
PNA		 9973 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
9974 list_del(&flowtable->list);
9975 table->use--;
9976 nf_tables_flowtable_destroy(flowtable);
9977 }
9978 list_for_each_entry_safe(set, ns, &table->sets, list) {
9979 list_del(&set->list);
9980 table->use--;
9981 nft_set_destroy(&ctx, set);
9982 }
9983 list_for_each_entry_safe(obj, ne, &table->objects, list) {
9984 nft_obj_del(obj);
9985 table->use--;
9986 nft_obj_destroy(&ctx, obj);
9987 }
9988 list_for_each_entry_safe(chain, nc, &table->chains, list) {
9989 ctx.chain = chain;
9990 nft_chain_del(chain);
9991 table->use--;
9992 nf_tables_chain_destroy(&ctx);
9993 }
fd020332
PNA		 9994 nf_tables_table_destroy(&ctx);
9995}
9996
bd1777b3 9997static void __nft_release_tables(struct net *net)
fd020332 9998{
d59d2f82 9999 struct nftables_pernet *nft_net = nft_pernet(net);
fd020332
PNA		 10000 struct nft_table *table, *nt;
10001
0854db2a 10002 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
bd1777b3 10003 if (nft_table_has_owner(table))
6001a930
PNA		 10004 continue;
10005
a499b03b
FW		 10006 list_del(&table->list);
10007
fd020332 10008 __nft_release_table(net, table);
6001a930
PNA		 10009 }
10010}
10011
10012static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
10013 void *ptr)
10014{
a499b03b 10015 struct nft_table *table, *to_delete[8];
0854db2a 10016 struct nftables_pernet *nft_net;
6001a930 10017 struct netlink_notify *n = ptr;
6001a930 10018 struct net *net = n->net;
a499b03b
FW		 10019 unsigned int deleted;
10020 bool restart = false;
6001a930
PNA		 10021
10022 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
10023 return NOTIFY_DONE;
10024
d59d2f82 10025 nft_net = nft_pernet(net);
a499b03b 10026 deleted = 0;
0854db2a 10027 mutex_lock(&nft_net->commit_mutex);
a499b03b 10028again:
0854db2a 10029 list_for_each_entry(table, &nft_net->tables, list) {
6001a930
PNA		 10030 if (nft_table_has_owner(table) &&
10031 n->portid == table->nlpid) {
10032 __nft_release_hook(net, table);
a499b03b
FW		 10033 list_del_rcu(&table->list);
10034 to_delete[deleted++] = table;
10035 if (deleted >= ARRAY_SIZE(to_delete))
10036 break;
6001a930
PNA		 10037 }
10038 }
a499b03b
FW		 10039 if (deleted) {
10040 restart = deleted >= ARRAY_SIZE(to_delete);
6001a930 10041 synchronize_rcu();
a499b03b
FW		 10042 while (deleted)
10043 __nft_release_table(net, to_delete[--deleted]);
10044
10045 if (restart)
10046 goto again;
6001a930 10047 }
0854db2a 10048 mutex_unlock(&nft_net->commit_mutex);
6001a930
PNA		 10049
10050 return NOTIFY_DONE;
df05ef87
PNA		 10051}
10052
6001a930
PNA		 10053static struct notifier_block nft_nl_notifier = {
10054 .notifier_call = nft_rcv_nl_event,
10055};
10056
dd4cbef7
PNA		 10057static int __net_init nf_tables_init_net(struct net *net)
10058{
d59d2f82 10059 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10060
10061 INIT_LIST_HEAD(&nft_net->tables);
10062 INIT_LIST_HEAD(&nft_net->commit_list);
10063 INIT_LIST_HEAD(&nft_net->module_list);
10064 INIT_LIST_HEAD(&nft_net->notify_list);
10065 mutex_init(&nft_net->commit_mutex);
10066 nft_net->base_seq = 1;
10067 nft_net->validate_state = NFT_VALIDATE_SKIP;
a654de8f 10068
dd4cbef7
PNA		 10069 return 0;
10070}
10071
767d1216
PNA		 10072static void __net_exit nf_tables_pre_exit_net(struct net *net)
10073{
3923b1e4
PNA		 10074 struct nftables_pernet *nft_net = nft_pernet(net);
10075
10076 mutex_lock(&nft_net->commit_mutex);
767d1216 10077 __nft_release_hooks(net);
3923b1e4 10078 mutex_unlock(&nft_net->commit_mutex);
767d1216
PNA		 10079}
10080
dd4cbef7
PNA		 10081static void __net_exit nf_tables_exit_net(struct net *net)
10082{
d59d2f82 10083 struct nftables_pernet *nft_net = nft_pernet(net);
0854db2a
FW		 10084
10085 mutex_lock(&nft_net->commit_mutex);
10086 if (!list_empty(&nft_net->commit_list))
c0391b6a 10087 __nf_tables_abort(net, NFNL_ABORT_NONE);
bd1777b3 10088 __nft_release_tables(net);
0854db2a
FW		 10089 mutex_unlock(&nft_net->commit_mutex);
10090 WARN_ON_ONCE(!list_empty(&nft_net->tables));
10091 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
10092 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
dd4cbef7
PNA		 10093}
10094
99633ab2 10095static struct pernet_operations nf_tables_net_ops = {
767d1216
PNA		 10096 .init = nf_tables_init_net,
10097 .pre_exit = nf_tables_pre_exit_net,
10098 .exit = nf_tables_exit_net,
0854db2a
FW		 10099 .id = &nf_tables_net_id,
10100 .size = sizeof(struct nftables_pernet),
99633ab2
PNA		 10101};
10102
96518518
PM		 10103static int __init nf_tables_module_init(void)
10104{
10105 int err;
10106
d209df3e
FW		 10107 err = register_pernet_subsys(&nf_tables_net_ops);
10108 if (err < 0)
10109 return err;
10110
10111 err = nft_chain_filter_init();
10112 if (err < 0)
6001a930 10113 goto err_chain_filter;
02c7b25e 10114
96518518
PM		 10115 err = nf_tables_core_module_init();
10116 if (err < 0)
6001a930 10117 goto err_core_module;
96518518 10118
d209df3e 10119 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
96518518 10120 if (err < 0)
6001a930 10121 goto err_netdev_notifier;
96518518 10122
4d44175a
FW		 10123 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
10124 if (err < 0)
6001a930 10125 goto err_rht_objname;
4d44175a 10126
06d392cb 10127 err = nft_offload_init();
10128 if (err < 0)
6001a930
PNA		 10129 goto err_offload;
10130
10131 err = netlink_register_notifier(&nft_nl_notifier);
10132 if (err < 0)
10133 goto err_netlink_notifier;
06d392cb 10134
d209df3e
FW		 10135 /* must be last */
10136 err = nfnetlink_subsys_register(&nf_tables_subsys);
10137 if (err < 0)
6001a930 10138 goto err_nfnl_subsys;
3b49e2e9 10139
c1deb065 10140 nft_chain_route_init();
3474a2c6 10141
d209df3e 10142 return err;
6001a930
PNA		 10143
10144err_nfnl_subsys:
10145 netlink_unregister_notifier(&nft_nl_notifier);
10146err_netlink_notifier:
06d392cb 10147 nft_offload_exit();
6001a930 10148err_offload:
4d44175a 10149 rhltable_destroy(&nft_objname_ht);
6001a930 10150err_rht_objname:
d209df3e 10151 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
6001a930 10152err_netdev_notifier:
96518518 10153 nf_tables_core_module_exit();
6001a930 10154err_core_module:
d209df3e 10155 nft_chain_filter_fini();
6001a930 10156err_chain_filter:
d209df3e 10157 unregister_pernet_subsys(&nf_tables_net_ops);
96518518
PM		 10158 return err;
10159}
10160
10161static void __exit nf_tables_module_exit(void)
10162{
10163 nfnetlink_subsys_unregister(&nf_tables_subsys);
6001a930 10164 netlink_unregister_notifier(&nft_nl_notifier);
06d392cb 10165 nft_offload_exit();
3b49e2e9 10166 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
0a2cf5ee 10167 nft_chain_filter_fini();
c1deb065 10168 nft_chain_route_fini();
71ad00c5 10169 unregister_pernet_subsys(&nf_tables_net_ops);
0935d558 10170 cancel_work_sync(&trans_destroy_work);
1b1bc49c 10171 rcu_barrier();
4d44175a 10172 rhltable_destroy(&nft_objname_ht);
96518518 10173 nf_tables_core_module_exit();
96518518
PM		 10174}
10175
10176module_init(nf_tables_module_init);
10177module_exit(nf_tables_module_exit);
10178
10179MODULE_LICENSE("GPL");
10180MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
10181MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);
Linux 6.x block layer and io_uring tree(s)