1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2007-2009 Patrick McHardy <kaber@trash.net>
5 * Development of this code funded by Astaro AG (http://www.astaro.com/)
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>
13 #include <linux/vmalloc.h>
14 #include <linux/rhashtable.h>
15 #include <linux/audit.h>
16 #include <linux/netfilter.h>
17 #include <linux/netfilter/nfnetlink.h>
18 #include <linux/netfilter/nf_tables.h>
19 #include <net/netfilter/nf_flow_table.h>
20 #include <net/netfilter/nf_tables_core.h>
21 #include <net/netfilter/nf_tables.h>
22 #include <net/netfilter/nf_tables_offload.h>
23 #include <net/net_namespace.h>
26 #define NFT_MODULE_AUTOLOAD_LIMIT (MODULE_NAME_LEN - sizeof("nft-expr-255-"))
28 unsigned int nf_tables_net_id __read_mostly;
30 static LIST_HEAD(nf_tables_expressions);
31 static LIST_HEAD(nf_tables_objects);
32 static LIST_HEAD(nf_tables_flowtables);
33 static LIST_HEAD(nf_tables_destroy_list);
34 static LIST_HEAD(nf_tables_gc_list);
35 static DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
36 static DEFINE_SPINLOCK(nf_tables_gc_list_lock);
39 NFT_VALIDATE_SKIP = 0,
44 static struct rhltable nft_objname_ht;
46 static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
47 static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
48 static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
50 static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
51 static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
52 static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
54 static const struct rhashtable_params nft_chain_ht_params = {
55 .head_offset = offsetof(struct nft_chain, rhlhead),
56 .key_offset = offsetof(struct nft_chain, name),
57 .hashfn = nft_chain_hash,
58 .obj_hashfn = nft_chain_hash_obj,
59 .obj_cmpfn = nft_chain_hash_cmp,
60 .automatic_shrinking = true,
63 static const struct rhashtable_params nft_objname_ht_params = {
64 .head_offset = offsetof(struct nft_object, rhlhead),
65 .key_offset = offsetof(struct nft_object, key),
66 .hashfn = nft_objname_hash,
67 .obj_hashfn = nft_objname_hash_obj,
68 .obj_cmpfn = nft_objname_hash_cmp,
69 .automatic_shrinking = true,
72 struct nft_audit_data {
73 struct nft_table *table;
76 struct list_head list;
79 static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
80 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
81 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
82 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
83 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
84 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
85 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
86 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
87 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
88 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
89 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
90 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
91 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
92 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
93 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
94 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
95 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
96 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
97 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
98 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
99 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
100 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
101 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
102 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
103 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
104 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
105 [NFT_MSG_GETSETELEM_RESET] = AUDIT_NFT_OP_SETELEM_RESET,
108 static void nft_validate_state_update(struct nft_table *table, u8 new_validate_state)
110 switch (table->validate_state) {
111 case NFT_VALIDATE_SKIP:
112 WARN_ON_ONCE(new_validate_state == NFT_VALIDATE_DO);
114 case NFT_VALIDATE_NEED:
116 case NFT_VALIDATE_DO:
117 if (new_validate_state == NFT_VALIDATE_NEED)
121 table->validate_state = new_validate_state;
123 static void nf_tables_trans_destroy_work(struct work_struct *w);
124 static DECLARE_WORK(trans_destroy_work, nf_tables_trans_destroy_work);
126 static void nft_trans_gc_work(struct work_struct *work);
127 static DECLARE_WORK(trans_gc_work, nft_trans_gc_work);
129 static void nft_ctx_init(struct nft_ctx *ctx,
131 const struct sk_buff *skb,
132 const struct nlmsghdr *nlh,
134 struct nft_table *table,
135 struct nft_chain *chain,
136 const struct nlattr * const *nla)
139 ctx->family = family;
144 ctx->portid = NETLINK_CB(skb).portid;
145 ctx->report = nlmsg_report(nlh);
146 ctx->flags = nlh->nlmsg_flags;
147 ctx->seq = nlh->nlmsg_seq;
150 static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
151 int msg_type, u32 size, gfp_t gfp)
153 struct nft_trans *trans;
155 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
159 INIT_LIST_HEAD(&trans->list);
160 INIT_LIST_HEAD(&trans->binding_list);
161 trans->msg_type = msg_type;
167 static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
168 int msg_type, u32 size)
170 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
173 static void nft_trans_list_del(struct nft_trans *trans)
175 list_del(&trans->list);
176 list_del(&trans->binding_list);
179 static void nft_trans_destroy(struct nft_trans *trans)
181 nft_trans_list_del(trans);
185 static void __nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set,
188 struct nftables_pernet *nft_net;
189 struct net *net = ctx->net;
190 struct nft_trans *trans;
192 if (!nft_set_is_anonymous(set))
195 nft_net = nft_pernet(net);
196 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
197 switch (trans->msg_type) {
199 if (nft_trans_set(trans) == set)
200 nft_trans_set_bound(trans) = bind;
202 case NFT_MSG_NEWSETELEM:
203 if (nft_trans_elem_set(trans) == set)
204 nft_trans_elem_set_bound(trans) = bind;
210 static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
212 return __nft_set_trans_bind(ctx, set, true);
215 static void nft_set_trans_unbind(const struct nft_ctx *ctx, struct nft_set *set)
217 return __nft_set_trans_bind(ctx, set, false);
220 static void __nft_chain_trans_bind(const struct nft_ctx *ctx,
221 struct nft_chain *chain, bool bind)
223 struct nftables_pernet *nft_net;
224 struct net *net = ctx->net;
225 struct nft_trans *trans;
227 if (!nft_chain_binding(chain))
230 nft_net = nft_pernet(net);
231 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
232 switch (trans->msg_type) {
233 case NFT_MSG_NEWCHAIN:
234 if (nft_trans_chain(trans) == chain)
235 nft_trans_chain_bound(trans) = bind;
237 case NFT_MSG_NEWRULE:
238 if (trans->ctx.chain == chain)
239 nft_trans_rule_bound(trans) = bind;
245 static void nft_chain_trans_bind(const struct nft_ctx *ctx,
246 struct nft_chain *chain)
248 __nft_chain_trans_bind(ctx, chain, true);
251 int nf_tables_bind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
253 if (!nft_chain_binding(chain))
256 if (nft_chain_binding(ctx->chain))
262 if (!nft_use_inc(&chain->use))
266 nft_chain_trans_bind(ctx, chain);
271 void nf_tables_unbind_chain(const struct nft_ctx *ctx, struct nft_chain *chain)
273 __nft_chain_trans_bind(ctx, chain, false);
276 static int nft_netdev_register_hooks(struct net *net,
277 struct list_head *hook_list)
279 struct nft_hook *hook;
283 list_for_each_entry(hook, hook_list, list) {
284 err = nf_register_net_hook(net, &hook->ops);
293 list_for_each_entry(hook, hook_list, list) {
297 nf_unregister_net_hook(net, &hook->ops);
302 static void nft_netdev_unregister_hooks(struct net *net,
303 struct list_head *hook_list,
306 struct nft_hook *hook, *next;
308 list_for_each_entry_safe(hook, next, hook_list, list) {
309 nf_unregister_net_hook(net, &hook->ops);
310 if (release_netdev) {
311 list_del(&hook->list);
312 kfree_rcu(hook, rcu);
317 static int nf_tables_register_hook(struct net *net,
318 const struct nft_table *table,
319 struct nft_chain *chain)
321 struct nft_base_chain *basechain;
322 const struct nf_hook_ops *ops;
324 if (table->flags & NFT_TABLE_F_DORMANT ||
325 !nft_is_base_chain(chain))
328 basechain = nft_base_chain(chain);
329 ops = &basechain->ops;
331 if (basechain->type->ops_register)
332 return basechain->type->ops_register(net, ops);
334 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
335 return nft_netdev_register_hooks(net, &basechain->hook_list);
337 return nf_register_net_hook(net, &basechain->ops);
340 static void __nf_tables_unregister_hook(struct net *net,
341 const struct nft_table *table,
342 struct nft_chain *chain,
345 struct nft_base_chain *basechain;
346 const struct nf_hook_ops *ops;
348 if (table->flags & NFT_TABLE_F_DORMANT ||
349 !nft_is_base_chain(chain))
351 basechain = nft_base_chain(chain);
352 ops = &basechain->ops;
354 if (basechain->type->ops_unregister)
355 return basechain->type->ops_unregister(net, ops);
357 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
358 nft_netdev_unregister_hooks(net, &basechain->hook_list,
361 nf_unregister_net_hook(net, &basechain->ops);
364 static void nf_tables_unregister_hook(struct net *net,
365 const struct nft_table *table,
366 struct nft_chain *chain)
368 return __nf_tables_unregister_hook(net, table, chain, false);
371 static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
373 struct nftables_pernet *nft_net = nft_pernet(net);
375 switch (trans->msg_type) {
377 if (!nft_trans_set_update(trans) &&
378 nft_set_is_anonymous(nft_trans_set(trans)))
379 list_add_tail(&trans->binding_list, &nft_net->binding_list);
381 case NFT_MSG_NEWCHAIN:
382 if (!nft_trans_chain_update(trans) &&
383 nft_chain_binding(nft_trans_chain(trans)))
384 list_add_tail(&trans->binding_list, &nft_net->binding_list);
388 list_add_tail(&trans->list, &nft_net->commit_list);
391 static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
393 struct nft_trans *trans;
395 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
399 if (msg_type == NFT_MSG_NEWTABLE)
400 nft_activate_next(ctx->net, ctx->table);
402 nft_trans_commit_list_add_tail(ctx->net, trans);
406 static int nft_deltable(struct nft_ctx *ctx)
410 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
414 nft_deactivate_next(ctx->net, ctx->table);
418 static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
420 struct nft_trans *trans;
422 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
424 return ERR_PTR(-ENOMEM);
426 if (msg_type == NFT_MSG_NEWCHAIN) {
427 nft_activate_next(ctx->net, ctx->chain);
429 if (ctx->nla[NFTA_CHAIN_ID]) {
430 nft_trans_chain_id(trans) =
431 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
434 nft_trans_chain(trans) = ctx->chain;
435 nft_trans_commit_list_add_tail(ctx->net, trans);
440 static int nft_delchain(struct nft_ctx *ctx)
442 struct nft_trans *trans;
444 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
446 return PTR_ERR(trans);
448 nft_use_dec(&ctx->table->use);
449 nft_deactivate_next(ctx->net, ctx->chain);
454 void nft_rule_expr_activate(const struct nft_ctx *ctx, struct nft_rule *rule)
456 struct nft_expr *expr;
458 expr = nft_expr_first(rule);
459 while (nft_expr_more(rule, expr)) {
460 if (expr->ops->activate)
461 expr->ops->activate(ctx, expr);
463 expr = nft_expr_next(expr);
467 void nft_rule_expr_deactivate(const struct nft_ctx *ctx, struct nft_rule *rule,
468 enum nft_trans_phase phase)
470 struct nft_expr *expr;
472 expr = nft_expr_first(rule);
473 while (nft_expr_more(rule, expr)) {
474 if (expr->ops->deactivate)
475 expr->ops->deactivate(ctx, expr, phase);
477 expr = nft_expr_next(expr);
482 nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
484 /* You cannot delete the same rule twice */
485 if (nft_is_active_next(ctx->net, rule)) {
486 nft_deactivate_next(ctx->net, rule);
487 nft_use_dec(&ctx->chain->use);
493 static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
494 struct nft_rule *rule)
496 struct nft_trans *trans;
498 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
502 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
503 nft_trans_rule_id(trans) =
504 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
506 nft_trans_rule(trans) = rule;
507 nft_trans_commit_list_add_tail(ctx->net, trans);
512 static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
514 struct nft_flow_rule *flow;
515 struct nft_trans *trans;
518 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
522 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
523 flow = nft_flow_rule_create(ctx->net, rule);
525 nft_trans_destroy(trans);
526 return PTR_ERR(flow);
529 nft_trans_flow_rule(trans) = flow;
532 err = nf_tables_delrule_deactivate(ctx, rule);
534 nft_trans_destroy(trans);
537 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
542 static int nft_delrule_by_chain(struct nft_ctx *ctx)
544 struct nft_rule *rule;
547 list_for_each_entry(rule, &ctx->chain->rules, list) {
548 if (!nft_is_active_next(ctx->net, rule))
551 err = nft_delrule(ctx, rule);
558 static int __nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
560 const struct nft_set_desc *desc)
562 struct nft_trans *trans;
564 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
568 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] && !desc) {
569 nft_trans_set_id(trans) =
570 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
571 nft_activate_next(ctx->net, set);
573 nft_trans_set(trans) = set;
575 nft_trans_set_update(trans) = true;
576 nft_trans_set_gc_int(trans) = desc->gc_int;
577 nft_trans_set_timeout(trans) = desc->timeout;
578 nft_trans_set_size(trans) = desc->size;
580 nft_trans_commit_list_add_tail(ctx->net, trans);
585 static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
588 return __nft_trans_set_add(ctx, msg_type, set, NULL);
591 static int nft_mapelem_deactivate(const struct nft_ctx *ctx,
593 const struct nft_set_iter *iter,
594 struct nft_set_elem *elem)
596 nft_setelem_data_deactivate(ctx->net, set, elem);
601 struct nft_set_elem_catchall {
602 struct list_head list;
607 static void nft_map_catchall_deactivate(const struct nft_ctx *ctx,
610 u8 genmask = nft_genmask_next(ctx->net);
611 struct nft_set_elem_catchall *catchall;
612 struct nft_set_elem elem;
613 struct nft_set_ext *ext;
615 list_for_each_entry(catchall, &set->catchall_list, list) {
616 ext = nft_set_elem_ext(set, catchall->elem);
617 if (!nft_set_elem_active(ext, genmask))
620 elem.priv = catchall->elem;
621 nft_setelem_data_deactivate(ctx->net, set, &elem);
626 static void nft_map_deactivate(const struct nft_ctx *ctx, struct nft_set *set)
628 struct nft_set_iter iter = {
629 .genmask = nft_genmask_next(ctx->net),
630 .fn = nft_mapelem_deactivate,
633 set->ops->walk(ctx, set, &iter);
634 WARN_ON_ONCE(iter.err);
636 nft_map_catchall_deactivate(ctx, set);
639 static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
643 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
647 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
648 nft_map_deactivate(ctx, set);
650 nft_deactivate_next(ctx->net, set);
651 nft_use_dec(&ctx->table->use);
656 static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
657 struct nft_object *obj)
659 struct nft_trans *trans;
661 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
665 if (msg_type == NFT_MSG_NEWOBJ)
666 nft_activate_next(ctx->net, obj);
668 nft_trans_obj(trans) = obj;
669 nft_trans_commit_list_add_tail(ctx->net, trans);
674 static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
678 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
682 nft_deactivate_next(ctx->net, obj);
683 nft_use_dec(&ctx->table->use);
688 static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
689 struct nft_flowtable *flowtable)
691 struct nft_trans *trans;
693 trans = nft_trans_alloc(ctx, msg_type,
694 sizeof(struct nft_trans_flowtable));
698 if (msg_type == NFT_MSG_NEWFLOWTABLE)
699 nft_activate_next(ctx->net, flowtable);
701 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
702 nft_trans_flowtable(trans) = flowtable;
703 nft_trans_commit_list_add_tail(ctx->net, trans);
708 static int nft_delflowtable(struct nft_ctx *ctx,
709 struct nft_flowtable *flowtable)
713 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
717 nft_deactivate_next(ctx->net, flowtable);
718 nft_use_dec(&ctx->table->use);
723 static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
727 for (i = track->regs[dreg].num_reg; i > 0; i--)
728 __nft_reg_track_cancel(track, dreg - i);
731 static void __nft_reg_track_update(struct nft_regs_track *track,
732 const struct nft_expr *expr,
735 track->regs[dreg].selector = expr;
736 track->regs[dreg].bitwise = NULL;
737 track->regs[dreg].num_reg = num_reg;
740 void nft_reg_track_update(struct nft_regs_track *track,
741 const struct nft_expr *expr, u8 dreg, u8 len)
743 unsigned int regcount;
746 __nft_reg_track_clobber(track, dreg);
748 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
749 for (i = 0; i < regcount; i++, dreg++)
750 __nft_reg_track_update(track, expr, dreg, i);
752 EXPORT_SYMBOL_GPL(nft_reg_track_update);
754 void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
756 unsigned int regcount;
759 __nft_reg_track_clobber(track, dreg);
761 regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
762 for (i = 0; i < regcount; i++, dreg++)
763 __nft_reg_track_cancel(track, dreg);
765 EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
767 void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
769 track->regs[dreg].selector = NULL;
770 track->regs[dreg].bitwise = NULL;
771 track->regs[dreg].num_reg = 0;
773 EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
779 static struct nft_table *nft_table_lookup(const struct net *net,
780 const struct nlattr *nla,
781 u8 family, u8 genmask, u32 nlpid)
783 struct nftables_pernet *nft_net;
784 struct nft_table *table;
787 return ERR_PTR(-EINVAL);
789 nft_net = nft_pernet(net);
790 list_for_each_entry_rcu(table, &nft_net->tables, list,
791 lockdep_is_held(&nft_net->commit_mutex)) {
792 if (!nla_strcmp(nla, table->name) &&
793 table->family == family &&
794 nft_active_genmask(table, genmask)) {
795 if (nft_table_has_owner(table) &&
796 nlpid && table->nlpid != nlpid)
797 return ERR_PTR(-EPERM);
803 return ERR_PTR(-ENOENT);
806 static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
807 const struct nlattr *nla,
808 u8 genmask, u32 nlpid)
810 struct nftables_pernet *nft_net;
811 struct nft_table *table;
813 nft_net = nft_pernet(net);
814 list_for_each_entry(table, &nft_net->tables, list) {
815 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
816 nft_active_genmask(table, genmask)) {
817 if (nft_table_has_owner(table) &&
818 nlpid && table->nlpid != nlpid)
819 return ERR_PTR(-EPERM);
825 return ERR_PTR(-ENOENT);
828 static inline u64 nf_tables_alloc_handle(struct nft_table *table)
830 return ++table->hgenerator;
833 static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
835 static const struct nft_chain_type *
836 __nft_chain_type_get(u8 family, enum nft_chain_types type)
838 if (family >= NFPROTO_NUMPROTO ||
839 type >= NFT_CHAIN_T_MAX)
842 return chain_type[family][type];
845 static const struct nft_chain_type *
846 __nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
848 const struct nft_chain_type *type;
851 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
852 type = __nft_chain_type_get(family, i);
855 if (!nla_strcmp(nla, type->name))
861 struct nft_module_request {
862 struct list_head list;
863 char module[MODULE_NAME_LEN];
867 #ifdef CONFIG_MODULES
868 __printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
871 char module_name[MODULE_NAME_LEN];
872 struct nftables_pernet *nft_net;
873 struct nft_module_request *req;
878 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
880 if (ret >= MODULE_NAME_LEN)
883 nft_net = nft_pernet(net);
884 list_for_each_entry(req, &nft_net->module_list, list) {
885 if (!strcmp(req->module, module_name)) {
889 /* A request to load this module already exists. */
894 req = kmalloc(sizeof(*req), GFP_KERNEL);
899 strscpy(req->module, module_name, MODULE_NAME_LEN);
900 list_add_tail(&req->list, &nft_net->module_list);
904 EXPORT_SYMBOL_GPL(nft_request_module);
907 static void lockdep_nfnl_nft_mutex_not_held(void)
909 #ifdef CONFIG_PROVE_LOCKING
911 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
915 static const struct nft_chain_type *
916 nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
917 u8 family, bool autoload)
919 const struct nft_chain_type *type;
921 type = __nf_tables_chain_type_lookup(nla, family);
925 lockdep_nfnl_nft_mutex_not_held();
926 #ifdef CONFIG_MODULES
928 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
930 (const char *)nla_data(nla)) == -EAGAIN)
931 return ERR_PTR(-EAGAIN);
934 return ERR_PTR(-ENOENT);
937 static __be16 nft_base_seq(const struct net *net)
939 struct nftables_pernet *nft_net = nft_pernet(net);
941 return htons(nft_net->base_seq & 0xffff);
944 static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
945 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
946 .len = NFT_TABLE_MAXNAMELEN - 1 },
947 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
948 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
949 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
950 .len = NFT_USERDATA_MAXLEN }
953 static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
954 u32 portid, u32 seq, int event, u32 flags,
955 int family, const struct nft_table *table)
957 struct nlmsghdr *nlh;
959 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
960 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
961 NFNETLINK_V0, nft_base_seq(net));
963 goto nla_put_failure;
965 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
966 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
967 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
969 goto nla_put_failure;
971 if (event == NFT_MSG_DELTABLE) {
976 if (nla_put_be32(skb, NFTA_TABLE_FLAGS,
977 htonl(table->flags & NFT_TABLE_F_MASK)))
978 goto nla_put_failure;
980 if (nft_table_has_owner(table) &&
981 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
982 goto nla_put_failure;
985 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
986 goto nla_put_failure;
993 nlmsg_trim(skb, nlh);
997 struct nftnl_skb_parms {
1000 #define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
1002 static void nft_notify_enqueue(struct sk_buff *skb, bool report,
1003 struct list_head *notify_list)
1005 NFT_CB(skb).report = report;
1006 list_add_tail(&skb->list, notify_list);
1009 static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
1011 struct nftables_pernet *nft_net;
1012 struct sk_buff *skb;
1017 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
1020 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1024 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1025 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1027 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
1028 event, flags, ctx->family, ctx->table);
1034 nft_net = nft_pernet(ctx->net);
1035 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
1038 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
1041 static int nf_tables_dump_tables(struct sk_buff *skb,
1042 struct netlink_callback *cb)
1044 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1045 struct nftables_pernet *nft_net;
1046 const struct nft_table *table;
1047 unsigned int idx = 0, s_idx = cb->args[0];
1048 struct net *net = sock_net(skb->sk);
1049 int family = nfmsg->nfgen_family;
1052 nft_net = nft_pernet(net);
1053 cb->seq = READ_ONCE(nft_net->base_seq);
1055 list_for_each_entry_rcu(table, &nft_net->tables, list) {
1056 if (family != NFPROTO_UNSPEC && family != table->family)
1062 memset(&cb->args[1], 0,
1063 sizeof(cb->args) - sizeof(cb->args[0]));
1064 if (!nft_is_active(net, table))
1066 if (nf_tables_fill_table_info(skb, net,
1067 NETLINK_CB(cb->skb).portid,
1069 NFT_MSG_NEWTABLE, NLM_F_MULTI,
1070 table->family, table) < 0)
1073 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1083 static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
1084 const struct nlmsghdr *nlh,
1085 struct netlink_dump_control *c)
1089 if (!try_module_get(THIS_MODULE))
1093 err = netlink_dump_start(nlsk, skb, nlh, c);
1095 module_put(THIS_MODULE);
1100 /* called with rcu_read_lock held */
1101 static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
1102 const struct nlattr * const nla[])
1104 struct netlink_ext_ack *extack = info->extack;
1105 u8 genmask = nft_genmask_cur(info->net);
1106 u8 family = info->nfmsg->nfgen_family;
1107 const struct nft_table *table;
1108 struct net *net = info->net;
1109 struct sk_buff *skb2;
1112 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
1113 struct netlink_dump_control c = {
1114 .dump = nf_tables_dump_tables,
1115 .module = THIS_MODULE,
1118 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
1121 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
1122 if (IS_ERR(table)) {
1123 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
1124 return PTR_ERR(table);
1127 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
1131 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
1132 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
1135 goto err_fill_table_info;
1137 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
1139 err_fill_table_info:
1144 static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
1146 struct nft_chain *chain;
1149 list_for_each_entry(chain, &table->chains, list) {
1150 if (!nft_is_active_next(net, chain))
1152 if (!nft_is_base_chain(chain))
1155 if (cnt && i++ == cnt)
1158 nf_tables_unregister_hook(net, table, chain);
1162 static int nf_tables_table_enable(struct net *net, struct nft_table *table)
1164 struct nft_chain *chain;
1167 list_for_each_entry(chain, &table->chains, list) {
1168 if (!nft_is_active_next(net, chain))
1170 if (!nft_is_base_chain(chain))
1173 err = nf_tables_register_hook(net, table, chain);
1175 goto err_register_hooks;
1183 nft_table_disable(net, table, i);
1187 static void nf_tables_table_disable(struct net *net, struct nft_table *table)
1189 table->flags &= ~NFT_TABLE_F_DORMANT;
1190 nft_table_disable(net, table, 0);
1191 table->flags |= NFT_TABLE_F_DORMANT;
1194 #define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
1195 #define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
1196 #define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
1197 #define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
1198 __NFT_TABLE_F_WAS_AWAKEN)
1200 static int nf_tables_updtable(struct nft_ctx *ctx)
1202 struct nft_trans *trans;
1206 if (!ctx->nla[NFTA_TABLE_FLAGS])
1209 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
1210 if (flags & ~NFT_TABLE_F_MASK)
1213 if (flags == ctx->table->flags)
1216 if ((nft_table_has_owner(ctx->table) &&
1217 !(flags & NFT_TABLE_F_OWNER)) ||
1218 (!nft_table_has_owner(ctx->table) &&
1219 flags & NFT_TABLE_F_OWNER))
1222 /* No dormant off/on/off/on games in single transaction */
1223 if (ctx->table->flags & __NFT_TABLE_F_UPDATE)
1226 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
1227 sizeof(struct nft_trans_table));
1231 if ((flags & NFT_TABLE_F_DORMANT) &&
1232 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
1233 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1234 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1235 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
1236 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1237 ctx->table->flags & NFT_TABLE_F_DORMANT) {
1238 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1239 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1240 ret = nf_tables_table_enable(ctx->net, ctx->table);
1242 goto err_register_hooks;
1244 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1248 nft_trans_table_update(trans) = true;
1249 nft_trans_commit_list_add_tail(ctx->net, trans);
1254 nft_trans_destroy(trans);
1258 static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1260 const char *name = data;
1262 return jhash(name, strlen(name), seed);
1265 static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1267 const struct nft_chain *chain = data;
1269 return nft_chain_hash(chain->name, 0, seed);
1272 static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1275 const struct nft_chain *chain = ptr;
1276 const char *name = arg->key;
1278 return strcmp(chain->name, name);
1281 static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1283 const struct nft_object_hash_key *k = data;
1285 seed ^= hash_ptr(k->table, 32);
1287 return jhash(k->name, strlen(k->name), seed);
1290 static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1292 const struct nft_object *obj = data;
1294 return nft_objname_hash(&obj->key, 0, seed);
1297 static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1300 const struct nft_object_hash_key *k = arg->key;
1301 const struct nft_object *obj = ptr;
1303 if (obj->key.table != k->table)
1306 return strcmp(obj->key.name, k->name);
1309 static bool nft_supported_family(u8 family)
1312 #ifdef CONFIG_NF_TABLES_INET
1313 || family == NFPROTO_INET
1315 #ifdef CONFIG_NF_TABLES_IPV4
1316 || family == NFPROTO_IPV4
1318 #ifdef CONFIG_NF_TABLES_ARP
1319 || family == NFPROTO_ARP
1321 #ifdef CONFIG_NF_TABLES_NETDEV
1322 || family == NFPROTO_NETDEV
1324 #if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
1325 || family == NFPROTO_BRIDGE
1327 #ifdef CONFIG_NF_TABLES_IPV6
1328 || family == NFPROTO_IPV6
1333 static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1334 const struct nlattr * const nla[])
1336 struct nftables_pernet *nft_net = nft_pernet(info->net);
1337 struct netlink_ext_ack *extack = info->extack;
1338 u8 genmask = nft_genmask_next(info->net);
1339 u8 family = info->nfmsg->nfgen_family;
1340 struct net *net = info->net;
1341 const struct nlattr *attr;
1342 struct nft_table *table;
1347 if (!nft_supported_family(family))
1350 lockdep_assert_held(&nft_net->commit_mutex);
1351 attr = nla[NFTA_TABLE_NAME];
1352 table = nft_table_lookup(net, attr, family, genmask,
1353 NETLINK_CB(skb).portid);
1354 if (IS_ERR(table)) {
1355 if (PTR_ERR(table) != -ENOENT)
1356 return PTR_ERR(table);
1358 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
1359 NL_SET_BAD_ATTR(extack, attr);
1362 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
1365 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1367 return nf_tables_updtable(&ctx);
1370 if (nla[NFTA_TABLE_FLAGS]) {
1371 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
1372 if (flags & ~NFT_TABLE_F_MASK)
1377 table = kzalloc(sizeof(*table), GFP_KERNEL_ACCOUNT);
1381 table->validate_state = nft_net->validate_state;
1382 table->name = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
1383 if (table->name == NULL)
1386 if (nla[NFTA_TABLE_USERDATA]) {
1387 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL_ACCOUNT);
1388 if (table->udata == NULL)
1389 goto err_table_udata;
1391 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
1394 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1398 INIT_LIST_HEAD(&table->chains);
1399 INIT_LIST_HEAD(&table->sets);
1400 INIT_LIST_HEAD(&table->objects);
1401 INIT_LIST_HEAD(&table->flowtables);
1402 table->family = family;
1403 table->flags = flags;
1404 table->handle = ++nft_net->table_handle;
1405 if (table->flags & NFT_TABLE_F_OWNER)
1406 table->nlpid = NETLINK_CB(skb).portid;
1408 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1409 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
1413 list_add_tail_rcu(&table->list, &nft_net->tables);
1416 rhltable_destroy(&table->chains_ht);
1418 kfree(table->udata);
1427 static int nft_flush_table(struct nft_ctx *ctx)
1429 struct nft_flowtable *flowtable, *nft;
1430 struct nft_chain *chain, *nc;
1431 struct nft_object *obj, *ne;
1432 struct nft_set *set, *ns;
1435 list_for_each_entry(chain, &ctx->table->chains, list) {
1436 if (!nft_is_active_next(ctx->net, chain))
1439 if (nft_chain_binding(chain))
1444 err = nft_delrule_by_chain(ctx);
1449 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
1450 if (!nft_is_active_next(ctx->net, set))
1453 if (nft_set_is_anonymous(set))
1456 err = nft_delset(ctx, set);
1461 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
1462 if (!nft_is_active_next(ctx->net, flowtable))
1465 err = nft_delflowtable(ctx, flowtable);
1470 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
1471 if (!nft_is_active_next(ctx->net, obj))
1474 err = nft_delobj(ctx, obj);
1479 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
1480 if (!nft_is_active_next(ctx->net, chain))
1483 if (nft_chain_binding(chain))
1488 err = nft_delchain(ctx);
1493 err = nft_deltable(ctx);
1498 static int nft_flush(struct nft_ctx *ctx, int family)
1500 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
1501 const struct nlattr * const *nla = ctx->nla;
1502 struct nft_table *table, *nt;
1505 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
1506 if (family != AF_UNSPEC && table->family != family)
1509 ctx->family = table->family;
1511 if (!nft_is_active_next(ctx->net, table))
1514 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1517 if (nla[NFTA_TABLE_NAME] &&
1518 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1523 err = nft_flush_table(ctx);
1531 static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1532 const struct nlattr * const nla[])
1534 struct netlink_ext_ack *extack = info->extack;
1535 u8 genmask = nft_genmask_next(info->net);
1536 u8 family = info->nfmsg->nfgen_family;
1537 struct net *net = info->net;
1538 const struct nlattr *attr;
1539 struct nft_table *table;
1542 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
1543 if (family == AF_UNSPEC ||
1544 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
1545 return nft_flush(&ctx, family);
1547 if (nla[NFTA_TABLE_HANDLE]) {
1548 attr = nla[NFTA_TABLE_HANDLE];
1549 table = nft_table_lookup_byhandle(net, attr, genmask,
1550 NETLINK_CB(skb).portid);
1552 attr = nla[NFTA_TABLE_NAME];
1553 table = nft_table_lookup(net, attr, family, genmask,
1554 NETLINK_CB(skb).portid);
1557 if (IS_ERR(table)) {
1558 if (PTR_ERR(table) == -ENOENT &&
1559 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
1562 NL_SET_BAD_ATTR(extack, attr);
1563 return PTR_ERR(table);
1566 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
1570 ctx.family = family;
1573 return nft_flush_table(&ctx);
1576 static void nf_tables_table_destroy(struct nft_ctx *ctx)
1578 if (WARN_ON(ctx->table->use > 0))
1581 rhltable_destroy(&ctx->table->chains_ht);
1582 kfree(ctx->table->name);
1583 kfree(ctx->table->udata);
1587 void nft_register_chain_type(const struct nft_chain_type *ctype)
1589 nfnl_lock(NFNL_SUBSYS_NFTABLES);
1590 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
1591 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1594 chain_type[ctype->family][ctype->type] = ctype;
1595 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1597 EXPORT_SYMBOL_GPL(nft_register_chain_type);
1599 void nft_unregister_chain_type(const struct nft_chain_type *ctype)
1601 nfnl_lock(NFNL_SUBSYS_NFTABLES);
1602 chain_type[ctype->family][ctype->type] = NULL;
1603 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1605 EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
1611 static struct nft_chain *
1612 nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
1614 struct nft_chain *chain;
1616 list_for_each_entry(chain, &table->chains, list) {
1617 if (chain->handle == handle &&
1618 nft_active_genmask(chain, genmask))
1622 return ERR_PTR(-ENOENT);
1625 static bool lockdep_commit_lock_is_held(const struct net *net)
1627 #ifdef CONFIG_PROVE_LOCKING
1628 struct nftables_pernet *nft_net = nft_pernet(net);
1630 return lockdep_is_held(&nft_net->commit_mutex);
1636 static struct nft_chain *nft_chain_lookup(struct net *net,
1637 struct nft_table *table,
1638 const struct nlattr *nla, u8 genmask)
1640 char search[NFT_CHAIN_MAXNAMELEN + 1];
1641 struct rhlist_head *tmp, *list;
1642 struct nft_chain *chain;
1645 return ERR_PTR(-EINVAL);
1647 nla_strscpy(search, nla, sizeof(search));
1649 WARN_ON(!rcu_read_lock_held() &&
1650 !lockdep_commit_lock_is_held(net));
1652 chain = ERR_PTR(-ENOENT);
1654 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1658 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1659 if (nft_active_genmask(chain, genmask))
1662 chain = ERR_PTR(-ENOENT);
1668 static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
1669 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1670 .len = NFT_TABLE_MAXNAMELEN - 1 },
1671 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1672 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1673 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1674 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
1675 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
1676 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1677 .len = NFT_MODULE_AUTOLOAD_LIMIT },
1678 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
1679 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
1680 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
1681 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1682 .len = NFT_USERDATA_MAXLEN },
1685 static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1686 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1687 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
1688 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1689 .len = IFNAMSIZ - 1 },
1692 static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1694 struct nft_stats *cpu_stats, total;
1695 struct nlattr *nest;
1703 memset(&total, 0, sizeof(total));
1704 for_each_possible_cpu(cpu) {
1705 cpu_stats = per_cpu_ptr(stats, cpu);
1707 seq = u64_stats_fetch_begin(&cpu_stats->syncp);
1708 pkts = cpu_stats->pkts;
1709 bytes = cpu_stats->bytes;
1710 } while (u64_stats_fetch_retry(&cpu_stats->syncp, seq));
1712 total.bytes += bytes;
1714 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
1716 goto nla_put_failure;
1718 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1719 NFTA_COUNTER_PAD) ||
1720 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1722 goto nla_put_failure;
1724 nla_nest_end(skb, nest);
1731 static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
1732 const struct nft_base_chain *basechain,
1733 const struct list_head *hook_list)
1735 const struct nf_hook_ops *ops = &basechain->ops;
1736 struct nft_hook *hook, *first = NULL;
1737 struct nlattr *nest, *nest_devs;
1740 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1742 goto nla_put_failure;
1743 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1744 goto nla_put_failure;
1745 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1746 goto nla_put_failure;
1748 if (nft_base_chain_netdev(family, ops->hooknum)) {
1749 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
1751 goto nla_put_failure;
1754 hook_list = &basechain->hook_list;
1756 list_for_each_entry(hook, hook_list, list) {
1760 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1761 hook->ops.dev->name))
1762 goto nla_put_failure;
1765 nla_nest_end(skb, nest_devs);
1768 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1769 goto nla_put_failure;
1771 nla_nest_end(skb, nest);
1778 static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1779 u32 portid, u32 seq, int event, u32 flags,
1780 int family, const struct nft_table *table,
1781 const struct nft_chain *chain,
1782 const struct list_head *hook_list)
1784 struct nlmsghdr *nlh;
1786 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
1787 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1788 NFNETLINK_V0, nft_base_seq(net));
1790 goto nla_put_failure;
1792 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name) ||
1793 nla_put_string(skb, NFTA_CHAIN_NAME, chain->name) ||
1794 nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
1796 goto nla_put_failure;
1798 if (event == NFT_MSG_DELCHAIN && !hook_list) {
1799 nlmsg_end(skb, nlh);
1803 if (nft_is_base_chain(chain)) {
1804 const struct nft_base_chain *basechain = nft_base_chain(chain);
1805 struct nft_stats __percpu *stats;
1807 if (nft_dump_basechain_hook(skb, family, basechain, hook_list))
1808 goto nla_put_failure;
1810 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1811 htonl(basechain->policy)))
1812 goto nla_put_failure;
1814 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1815 goto nla_put_failure;
1817 stats = rcu_dereference_check(basechain->stats,
1818 lockdep_commit_lock_is_held(net));
1819 if (nft_dump_stats(skb, stats))
1820 goto nla_put_failure;
1824 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1825 goto nla_put_failure;
1827 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1828 goto nla_put_failure;
1831 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1832 goto nla_put_failure;
1834 nlmsg_end(skb, nlh);
1838 nlmsg_trim(skb, nlh);
1842 static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event,
1843 const struct list_head *hook_list)
1845 struct nftables_pernet *nft_net;
1846 struct sk_buff *skb;
1851 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
1854 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1858 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1859 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1861 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
1862 event, flags, ctx->family, ctx->table,
1863 ctx->chain, hook_list);
1869 nft_net = nft_pernet(ctx->net);
1870 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
1873 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
1876 static int nf_tables_dump_chains(struct sk_buff *skb,
1877 struct netlink_callback *cb)
1879 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1880 unsigned int idx = 0, s_idx = cb->args[0];
1881 struct net *net = sock_net(skb->sk);
1882 int family = nfmsg->nfgen_family;
1883 struct nftables_pernet *nft_net;
1884 const struct nft_table *table;
1885 const struct nft_chain *chain;
1888 nft_net = nft_pernet(net);
1889 cb->seq = READ_ONCE(nft_net->base_seq);
1891 list_for_each_entry_rcu(table, &nft_net->tables, list) {
1892 if (family != NFPROTO_UNSPEC && family != table->family)
1895 list_for_each_entry_rcu(chain, &table->chains, list) {
1899 memset(&cb->args[1], 0,
1900 sizeof(cb->args) - sizeof(cb->args[0]));
1901 if (!nft_is_active(net, chain))
1903 if (nf_tables_fill_chain_info(skb, net,
1904 NETLINK_CB(cb->skb).portid,
1908 table->family, table,
1912 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1923 /* called with rcu_read_lock held */
1924 static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1925 const struct nlattr * const nla[])
1927 struct netlink_ext_ack *extack = info->extack;
1928 u8 genmask = nft_genmask_cur(info->net);
1929 u8 family = info->nfmsg->nfgen_family;
1930 const struct nft_chain *chain;
1931 struct net *net = info->net;
1932 struct nft_table *table;
1933 struct sk_buff *skb2;
1936 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
1937 struct netlink_dump_control c = {
1938 .dump = nf_tables_dump_chains,
1939 .module = THIS_MODULE,
1942 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
1945 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
1946 if (IS_ERR(table)) {
1947 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
1948 return PTR_ERR(table);
1951 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
1952 if (IS_ERR(chain)) {
1953 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
1954 return PTR_ERR(chain);
1957 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
1961 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
1962 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
1963 0, family, table, chain, NULL);
1965 goto err_fill_chain_info;
1967 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
1969 err_fill_chain_info:
1974 static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1975 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1976 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1979 static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
1981 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1982 struct nft_stats __percpu *newstats;
1983 struct nft_stats *stats;
1986 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1987 nft_counter_policy, NULL);
1989 return ERR_PTR(err);
1991 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
1992 return ERR_PTR(-EINVAL);
1994 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
1995 if (newstats == NULL)
1996 return ERR_PTR(-ENOMEM);
1998 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1999 * are not exposed to userspace.
2002 stats = this_cpu_ptr(newstats);
2003 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
2004 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
2010 static void nft_chain_stats_replace(struct nft_trans *trans)
2012 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
2014 if (!nft_trans_chain_stats(trans))
2017 nft_trans_chain_stats(trans) =
2018 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
2019 lockdep_commit_lock_is_held(trans->ctx.net));
2021 if (!nft_trans_chain_stats(trans))
2022 static_branch_inc(&nft_counters_enabled);
2025 static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
2027 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
2028 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
2034 /* should be NULL either via abort or via successful commit */
2035 WARN_ON_ONCE(chain->blob_next);
2036 kvfree(chain->blob_next);
2039 void nf_tables_chain_destroy(struct nft_ctx *ctx)
2041 struct nft_chain *chain = ctx->chain;
2042 struct nft_hook *hook, *next;
2044 if (WARN_ON(chain->use > 0))
2047 /* no concurrent access possible anymore */
2048 nf_tables_chain_free_chain_rules(chain);
2050 if (nft_is_base_chain(chain)) {
2051 struct nft_base_chain *basechain = nft_base_chain(chain);
2053 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2054 list_for_each_entry_safe(hook, next,
2055 &basechain->hook_list, list) {
2056 list_del_rcu(&hook->list);
2057 kfree_rcu(hook, rcu);
2060 module_put(basechain->type->owner);
2061 if (rcu_access_pointer(basechain->stats)) {
2062 static_branch_dec(&nft_counters_enabled);
2063 free_percpu(rcu_dereference_raw(basechain->stats));
2066 kfree(chain->udata);
2070 kfree(chain->udata);
2075 static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
2076 const struct nlattr *attr)
2078 struct net_device *dev;
2079 char ifname[IFNAMSIZ];
2080 struct nft_hook *hook;
2083 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
2086 goto err_hook_alloc;
2089 nla_strscpy(ifname, attr, IFNAMSIZ);
2090 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
2091 * indirectly serializing all the other holders of the commit_mutex with
2094 dev = __dev_get_by_name(net, ifname);
2099 hook->ops.dev = dev;
2106 return ERR_PTR(err);
2109 static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
2110 const struct nft_hook *this)
2112 struct nft_hook *hook;
2114 list_for_each_entry(hook, hook_list, list) {
2115 if (this->ops.dev == hook->ops.dev)
2122 static int nf_tables_parse_netdev_hooks(struct net *net,
2123 const struct nlattr *attr,
2124 struct list_head *hook_list,
2125 struct netlink_ext_ack *extack)
2127 struct nft_hook *hook, *next;
2128 const struct nlattr *tmp;
2129 int rem, n = 0, err;
2131 nla_for_each_nested(tmp, attr, rem) {
2132 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
2137 hook = nft_netdev_hook_alloc(net, tmp);
2139 NL_SET_BAD_ATTR(extack, tmp);
2140 err = PTR_ERR(hook);
2143 if (nft_hook_list_find(hook_list, hook)) {
2144 NL_SET_BAD_ATTR(extack, tmp);
2149 list_add_tail(&hook->list, hook_list);
2152 if (n == NFT_NETDEVICE_MAX) {
2161 list_for_each_entry_safe(hook, next, hook_list, list) {
2162 list_del(&hook->list);
2168 struct nft_chain_hook {
2171 const struct nft_chain_type *type;
2172 struct list_head list;
2175 static int nft_chain_parse_netdev(struct net *net, struct nlattr *tb[],
2176 struct list_head *hook_list,
2177 struct netlink_ext_ack *extack, u32 flags)
2179 struct nft_hook *hook;
2182 if (tb[NFTA_HOOK_DEV]) {
2183 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
2185 NL_SET_BAD_ATTR(extack, tb[NFTA_HOOK_DEV]);
2186 return PTR_ERR(hook);
2189 list_add_tail(&hook->list, hook_list);
2190 } else if (tb[NFTA_HOOK_DEVS]) {
2191 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
2198 if (flags & NFT_CHAIN_HW_OFFLOAD &&
2199 list_empty(hook_list))
2205 static int nft_chain_parse_hook(struct net *net,
2206 struct nft_base_chain *basechain,
2207 const struct nlattr * const nla[],
2208 struct nft_chain_hook *hook, u8 family,
2209 u32 flags, struct netlink_ext_ack *extack)
2211 struct nftables_pernet *nft_net = nft_pernet(net);
2212 struct nlattr *ha[NFTA_HOOK_MAX + 1];
2213 const struct nft_chain_type *type;
2216 lockdep_assert_held(&nft_net->commit_mutex);
2217 lockdep_nfnl_nft_mutex_not_held();
2219 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
2220 nla[NFTA_CHAIN_HOOK],
2221 nft_hook_policy, NULL);
2226 if (!ha[NFTA_HOOK_HOOKNUM] ||
2227 !ha[NFTA_HOOK_PRIORITY]) {
2228 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2232 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2233 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2235 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
2239 if (nla[NFTA_CHAIN_TYPE]) {
2240 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
2243 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2244 return PTR_ERR(type);
2247 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
2250 if (type->type == NFT_CHAIN_T_NAT &&
2251 hook->priority <= NF_IP_PRI_CONNTRACK)
2254 if (ha[NFTA_HOOK_HOOKNUM]) {
2255 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
2256 if (hook->num != basechain->ops.hooknum)
2259 if (ha[NFTA_HOOK_PRIORITY]) {
2260 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
2261 if (hook->priority != basechain->ops.priority)
2265 type = basechain->type;
2268 if (!try_module_get(type->owner)) {
2269 if (nla[NFTA_CHAIN_TYPE])
2270 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
2276 INIT_LIST_HEAD(&hook->list);
2277 if (nft_base_chain_netdev(family, hook->num)) {
2278 err = nft_chain_parse_netdev(net, ha, &hook->list, extack, flags);
2280 module_put(type->owner);
2283 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
2284 module_put(type->owner);
2291 static void nft_chain_release_hook(struct nft_chain_hook *hook)
2293 struct nft_hook *h, *next;
2295 list_for_each_entry_safe(h, next, &hook->list, list) {
2299 module_put(hook->type->owner);
2302 static void nft_last_rule(const struct nft_chain *chain, const void *ptr)
2304 struct nft_rule_dp_last *lrule;
2306 BUILD_BUG_ON(offsetof(struct nft_rule_dp_last, end) != 0);
2308 lrule = (struct nft_rule_dp_last *)ptr;
2309 lrule->end.is_last = 1;
2310 lrule->chain = chain;
2311 /* blob size does not include the trailer rule */
2314 static struct nft_rule_blob *nf_tables_chain_alloc_rules(const struct nft_chain *chain,
2317 struct nft_rule_blob *blob;
2322 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rule_dp_last);
2324 blob = kvmalloc(size, GFP_KERNEL_ACCOUNT);
2329 nft_last_rule(chain, blob->data);
2334 static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2335 const struct nft_chain_hook *hook,
2336 struct nft_chain *chain)
2339 ops->hooknum = hook->num;
2340 ops->priority = hook->priority;
2342 ops->hook = hook->type->hooks[ops->hooknum];
2343 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
2346 static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2347 struct nft_chain_hook *hook, u32 flags)
2349 struct nft_chain *chain;
2352 basechain->type = hook->type;
2353 INIT_LIST_HEAD(&basechain->hook_list);
2354 chain = &basechain->chain;
2356 if (nft_base_chain_netdev(family, hook->num)) {
2357 list_splice_init(&hook->list, &basechain->hook_list);
2358 list_for_each_entry(h, &basechain->hook_list, list)
2359 nft_basechain_hook_init(&h->ops, family, hook, chain);
2361 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
2363 chain->flags |= NFT_CHAIN_BASE | flags;
2364 basechain->policy = NF_ACCEPT;
2365 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
2366 !nft_chain_offload_support(basechain)) {
2367 list_splice_init(&basechain->hook_list, &hook->list);
2371 flow_block_init(&basechain->flow_block);
2376 int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
2380 err = rhltable_insert_key(&table->chains_ht, chain->name,
2381 &chain->rhlhead, nft_chain_ht_params);
2385 list_add_tail_rcu(&chain->list, &table->chains);
2390 static u64 chain_id;
2392 static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
2393 u8 policy, u32 flags,
2394 struct netlink_ext_ack *extack)
2396 const struct nlattr * const *nla = ctx->nla;
2397 struct nft_table *table = ctx->table;
2398 struct nft_base_chain *basechain;
2399 struct net *net = ctx->net;
2400 char name[NFT_NAME_MAXLEN];
2401 struct nft_rule_blob *blob;
2402 struct nft_trans *trans;
2403 struct nft_chain *chain;
2406 if (nla[NFTA_CHAIN_HOOK]) {
2407 struct nft_stats __percpu *stats = NULL;
2408 struct nft_chain_hook hook = {};
2410 if (flags & NFT_CHAIN_BINDING)
2413 err = nft_chain_parse_hook(net, NULL, nla, &hook, family, flags,
2418 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL_ACCOUNT);
2419 if (basechain == NULL) {
2420 nft_chain_release_hook(&hook);
2423 chain = &basechain->chain;
2425 if (nla[NFTA_CHAIN_COUNTERS]) {
2426 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2427 if (IS_ERR(stats)) {
2428 nft_chain_release_hook(&hook);
2430 return PTR_ERR(stats);
2432 rcu_assign_pointer(basechain->stats, stats);
2435 err = nft_basechain_init(basechain, family, &hook, flags);
2437 nft_chain_release_hook(&hook);
2443 static_branch_inc(&nft_counters_enabled);
2445 if (flags & NFT_CHAIN_BASE)
2447 if (flags & NFT_CHAIN_HW_OFFLOAD)
2450 chain = kzalloc(sizeof(*chain), GFP_KERNEL_ACCOUNT);
2454 chain->flags = flags;
2458 INIT_LIST_HEAD(&chain->rules);
2459 chain->handle = nf_tables_alloc_handle(table);
2460 chain->table = table;
2462 if (nla[NFTA_CHAIN_NAME]) {
2463 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
2465 if (!(flags & NFT_CHAIN_BINDING)) {
2467 goto err_destroy_chain;
2470 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
2471 chain->name = kstrdup(name, GFP_KERNEL_ACCOUNT);
2476 goto err_destroy_chain;
2479 if (nla[NFTA_CHAIN_USERDATA]) {
2480 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL_ACCOUNT);
2481 if (chain->udata == NULL) {
2483 goto err_destroy_chain;
2485 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
2488 blob = nf_tables_chain_alloc_rules(chain, 0);
2491 goto err_destroy_chain;
2494 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2495 RCU_INIT_POINTER(chain->blob_gen_1, blob);
2497 err = nf_tables_register_hook(net, table, chain);
2499 goto err_destroy_chain;
2501 if (!nft_use_inc(&table->use)) {
2506 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2507 if (IS_ERR(trans)) {
2508 err = PTR_ERR(trans);
2509 goto err_unregister_hook;
2512 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
2513 if (nft_is_base_chain(chain))
2514 nft_trans_chain_policy(trans) = policy;
2516 err = nft_chain_add(table, chain);
2518 nft_trans_destroy(trans);
2519 goto err_unregister_hook;
2524 err_unregister_hook:
2525 nft_use_dec_restore(&table->use);
2527 nf_tables_unregister_hook(net, table, chain);
2529 nf_tables_chain_destroy(ctx);
2534 static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
2535 u32 flags, const struct nlattr *attr,
2536 struct netlink_ext_ack *extack)
2538 const struct nlattr * const *nla = ctx->nla;
2539 struct nft_base_chain *basechain = NULL;
2540 struct nft_table *table = ctx->table;
2541 struct nft_chain *chain = ctx->chain;
2542 struct nft_chain_hook hook = {};
2543 struct nft_stats *stats = NULL;
2544 struct nft_hook *h, *next;
2545 struct nf_hook_ops *ops;
2546 struct nft_trans *trans;
2547 bool unregister = false;
2550 if (chain->flags ^ flags)
2553 INIT_LIST_HEAD(&hook.list);
2555 if (nla[NFTA_CHAIN_HOOK]) {
2556 if (!nft_is_base_chain(chain)) {
2557 NL_SET_BAD_ATTR(extack, attr);
2561 basechain = nft_base_chain(chain);
2562 err = nft_chain_parse_hook(ctx->net, basechain, nla, &hook,
2563 ctx->family, flags, extack);
2567 if (basechain->type != hook.type) {
2568 nft_chain_release_hook(&hook);
2569 NL_SET_BAD_ATTR(extack, attr);
2573 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
2574 list_for_each_entry_safe(h, next, &hook.list, list) {
2575 h->ops.pf = basechain->ops.pf;
2576 h->ops.hooknum = basechain->ops.hooknum;
2577 h->ops.priority = basechain->ops.priority;
2578 h->ops.priv = basechain->ops.priv;
2579 h->ops.hook = basechain->ops.hook;
2581 if (nft_hook_list_find(&basechain->hook_list, h)) {
2587 ops = &basechain->ops;
2588 if (ops->hooknum != hook.num ||
2589 ops->priority != hook.priority) {
2590 nft_chain_release_hook(&hook);
2591 NL_SET_BAD_ATTR(extack, attr);
2597 if (nla[NFTA_CHAIN_HANDLE] &&
2598 nla[NFTA_CHAIN_NAME]) {
2599 struct nft_chain *chain2;
2601 chain2 = nft_chain_lookup(ctx->net, table,
2602 nla[NFTA_CHAIN_NAME], genmask);
2603 if (!IS_ERR(chain2)) {
2604 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2610 if (nla[NFTA_CHAIN_COUNTERS]) {
2611 if (!nft_is_base_chain(chain)) {
2616 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2617 if (IS_ERR(stats)) {
2618 err = PTR_ERR(stats);
2623 if (!(table->flags & NFT_TABLE_F_DORMANT) &&
2624 nft_is_base_chain(chain) &&
2625 !list_empty(&hook.list)) {
2626 basechain = nft_base_chain(chain);
2627 ops = &basechain->ops;
2629 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {
2630 err = nft_netdev_register_hooks(ctx->net, &hook.list);
2638 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2639 sizeof(struct nft_trans_chain));
2643 nft_trans_chain_stats(trans) = stats;
2644 nft_trans_chain_update(trans) = true;
2646 if (nla[NFTA_CHAIN_POLICY])
2647 nft_trans_chain_policy(trans) = policy;
2649 nft_trans_chain_policy(trans) = -1;
2651 if (nla[NFTA_CHAIN_HANDLE] &&
2652 nla[NFTA_CHAIN_NAME]) {
2653 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
2654 struct nft_trans *tmp;
2658 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL_ACCOUNT);
2663 list_for_each_entry(tmp, &nft_net->commit_list, list) {
2664 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2665 tmp->ctx.table == table &&
2666 nft_trans_chain_update(tmp) &&
2667 nft_trans_chain_name(tmp) &&
2668 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
2669 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2675 nft_trans_chain_name(trans) = name;
2678 nft_trans_basechain(trans) = basechain;
2679 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2680 list_splice(&hook.list, &nft_trans_chain_hooks(trans));
2681 if (nla[NFTA_CHAIN_HOOK])
2682 module_put(hook.type->owner);
2684 nft_trans_commit_list_add_tail(ctx->net, trans);
2692 if (nla[NFTA_CHAIN_HOOK]) {
2693 list_for_each_entry_safe(h, next, &hook.list, list) {
2695 nf_unregister_net_hook(ctx->net, &h->ops);
2699 module_put(hook.type->owner);
2705 static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
2706 const struct nft_table *table,
2707 const struct nlattr *nla, u8 genmask)
2709 struct nftables_pernet *nft_net = nft_pernet(net);
2710 u32 id = ntohl(nla_get_be32(nla));
2711 struct nft_trans *trans;
2713 list_for_each_entry(trans, &nft_net->commit_list, list) {
2714 struct nft_chain *chain = trans->ctx.chain;
2716 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
2717 chain->table == table &&
2718 id == nft_trans_chain_id(trans) &&
2719 nft_active_genmask(chain, genmask))
2722 return ERR_PTR(-ENOENT);
2725 static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2726 const struct nlattr * const nla[])
2728 struct nftables_pernet *nft_net = nft_pernet(info->net);
2729 struct netlink_ext_ack *extack = info->extack;
2730 u8 genmask = nft_genmask_next(info->net);
2731 u8 family = info->nfmsg->nfgen_family;
2732 struct nft_chain *chain = NULL;
2733 struct net *net = info->net;
2734 const struct nlattr *attr;
2735 struct nft_table *table;
2736 u8 policy = NF_ACCEPT;
2741 lockdep_assert_held(&nft_net->commit_mutex);
2743 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2744 NETLINK_CB(skb).portid);
2745 if (IS_ERR(table)) {
2746 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
2747 return PTR_ERR(table);
2751 attr = nla[NFTA_CHAIN_NAME];
2753 if (nla[NFTA_CHAIN_HANDLE]) {
2754 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
2755 chain = nft_chain_lookup_byhandle(table, handle, genmask);
2756 if (IS_ERR(chain)) {
2757 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
2758 return PTR_ERR(chain);
2760 attr = nla[NFTA_CHAIN_HANDLE];
2761 } else if (nla[NFTA_CHAIN_NAME]) {
2762 chain = nft_chain_lookup(net, table, attr, genmask);
2763 if (IS_ERR(chain)) {
2764 if (PTR_ERR(chain) != -ENOENT) {
2765 NL_SET_BAD_ATTR(extack, attr);
2766 return PTR_ERR(chain);
2770 } else if (!nla[NFTA_CHAIN_ID]) {
2774 if (nla[NFTA_CHAIN_POLICY]) {
2775 if (chain != NULL &&
2776 !nft_is_base_chain(chain)) {
2777 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
2781 if (chain == NULL &&
2782 nla[NFTA_CHAIN_HOOK] == NULL) {
2783 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
2787 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
2797 if (nla[NFTA_CHAIN_FLAGS])
2798 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
2800 flags = chain->flags;
2802 if (flags & ~NFT_CHAIN_FLAGS)
2805 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2807 if (chain != NULL) {
2808 if (chain->flags & NFT_CHAIN_BINDING)
2811 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
2812 NL_SET_BAD_ATTR(extack, attr);
2815 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
2818 flags |= chain->flags & NFT_CHAIN_BASE;
2819 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2823 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
2826 static int nft_delchain_hook(struct nft_ctx *ctx,
2827 struct nft_base_chain *basechain,
2828 struct netlink_ext_ack *extack)
2830 const struct nft_chain *chain = &basechain->chain;
2831 const struct nlattr * const *nla = ctx->nla;
2832 struct nft_chain_hook chain_hook = {};
2833 struct nft_hook *this, *hook;
2834 LIST_HEAD(chain_del_list);
2835 struct nft_trans *trans;
2838 err = nft_chain_parse_hook(ctx->net, basechain, nla, &chain_hook,
2839 ctx->family, chain->flags, extack);
2843 list_for_each_entry(this, &chain_hook.list, list) {
2844 hook = nft_hook_list_find(&basechain->hook_list, this);
2847 goto err_chain_del_hook;
2849 list_move(&hook->list, &chain_del_list);
2852 trans = nft_trans_alloc(ctx, NFT_MSG_DELCHAIN,
2853 sizeof(struct nft_trans_chain));
2856 goto err_chain_del_hook;
2859 nft_trans_basechain(trans) = basechain;
2860 nft_trans_chain_update(trans) = true;
2861 INIT_LIST_HEAD(&nft_trans_chain_hooks(trans));
2862 list_splice(&chain_del_list, &nft_trans_chain_hooks(trans));
2863 nft_chain_release_hook(&chain_hook);
2865 nft_trans_commit_list_add_tail(ctx->net, trans);
2870 list_splice(&chain_del_list, &basechain->hook_list);
2871 nft_chain_release_hook(&chain_hook);
2876 static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2877 const struct nlattr * const nla[])
2879 struct netlink_ext_ack *extack = info->extack;
2880 u8 genmask = nft_genmask_next(info->net);
2881 u8 family = info->nfmsg->nfgen_family;
2882 struct net *net = info->net;
2883 const struct nlattr *attr;
2884 struct nft_table *table;
2885 struct nft_chain *chain;
2886 struct nft_rule *rule;
2892 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2893 NETLINK_CB(skb).portid);
2894 if (IS_ERR(table)) {
2895 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
2896 return PTR_ERR(table);
2899 if (nla[NFTA_CHAIN_HANDLE]) {
2900 attr = nla[NFTA_CHAIN_HANDLE];
2901 handle = be64_to_cpu(nla_get_be64(attr));
2902 chain = nft_chain_lookup_byhandle(table, handle, genmask);
2904 attr = nla[NFTA_CHAIN_NAME];
2905 chain = nft_chain_lookup(net, table, attr, genmask);
2907 if (IS_ERR(chain)) {
2908 if (PTR_ERR(chain) == -ENOENT &&
2909 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
2912 NL_SET_BAD_ATTR(extack, attr);
2913 return PTR_ERR(chain);
2916 if (nft_chain_binding(chain))
2919 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2921 if (nla[NFTA_CHAIN_HOOK]) {
2922 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2925 if (nft_is_base_chain(chain)) {
2926 struct nft_base_chain *basechain = nft_base_chain(chain);
2928 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
2929 return nft_delchain_hook(&ctx, basechain, extack);
2933 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
2938 list_for_each_entry(rule, &chain->rules, list) {
2939 if (!nft_is_active_next(net, rule))
2943 err = nft_delrule(&ctx, rule);
2948 /* There are rules and elements that are still holding references to us,
2949 * we cannot do a recursive removal in this case.
2952 NL_SET_BAD_ATTR(extack, attr);
2956 return nft_delchain(&ctx);
2964 * nft_register_expr - register nf_tables expr type
2967 * Registers the expr type for use with nf_tables. Returns zero on
2968 * success or a negative errno code otherwise.
2970 int nft_register_expr(struct nft_expr_type *type)
2972 nfnl_lock(NFNL_SUBSYS_NFTABLES);
2973 if (type->family == NFPROTO_UNSPEC)
2974 list_add_tail_rcu(&type->list, &nf_tables_expressions);
2976 list_add_rcu(&type->list, &nf_tables_expressions);
2977 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2980 EXPORT_SYMBOL_GPL(nft_register_expr);
2983 * nft_unregister_expr - unregister nf_tables expr type
2986 * Unregisters the expr typefor use with nf_tables.
2988 void nft_unregister_expr(struct nft_expr_type *type)
2990 nfnl_lock(NFNL_SUBSYS_NFTABLES);
2991 list_del_rcu(&type->list);
2992 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2994 EXPORT_SYMBOL_GPL(nft_unregister_expr);
2996 static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2999 const struct nft_expr_type *type, *candidate = NULL;
3001 list_for_each_entry(type, &nf_tables_expressions, list) {
3002 if (!nla_strcmp(nla, type->name)) {
3003 if (!type->family && !candidate)
3005 else if (type->family == family)
3012 #ifdef CONFIG_MODULES
3013 static int nft_expr_type_request_module(struct net *net, u8 family,
3016 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
3017 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
3024 static const struct nft_expr_type *nft_expr_type_get(struct net *net,
3028 const struct nft_expr_type *type;
3031 return ERR_PTR(-EINVAL);
3033 type = __nft_expr_type_get(family, nla);
3034 if (type != NULL && try_module_get(type->owner))
3037 lockdep_nfnl_nft_mutex_not_held();
3038 #ifdef CONFIG_MODULES
3040 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
3041 return ERR_PTR(-EAGAIN);
3043 if (nft_request_module(net, "nft-expr-%.*s",
3045 (char *)nla_data(nla)) == -EAGAIN)
3046 return ERR_PTR(-EAGAIN);
3049 return ERR_PTR(-ENOENT);
3052 static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
3053 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
3054 .len = NFT_MODULE_AUTOLOAD_LIMIT },
3055 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
3058 static int nf_tables_fill_expr_info(struct sk_buff *skb,
3059 const struct nft_expr *expr, bool reset)
3061 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
3062 goto nla_put_failure;
3064 if (expr->ops->dump) {
3065 struct nlattr *data = nla_nest_start_noflag(skb,
3068 goto nla_put_failure;
3069 if (expr->ops->dump(skb, expr, reset) < 0)
3070 goto nla_put_failure;
3071 nla_nest_end(skb, data);
3080 int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
3081 const struct nft_expr *expr, bool reset)
3083 struct nlattr *nest;
3085 nest = nla_nest_start_noflag(skb, attr);
3087 goto nla_put_failure;
3088 if (nf_tables_fill_expr_info(skb, expr, reset) < 0)
3089 goto nla_put_failure;
3090 nla_nest_end(skb, nest);
3097 struct nft_expr_info {
3098 const struct nft_expr_ops *ops;
3099 const struct nlattr *attr;
3100 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
3103 static int nf_tables_expr_parse(const struct nft_ctx *ctx,
3104 const struct nlattr *nla,
3105 struct nft_expr_info *info)
3107 const struct nft_expr_type *type;
3108 const struct nft_expr_ops *ops;
3109 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3112 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3113 nft_expr_policy, NULL);
3117 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
3119 return PTR_ERR(type);
3121 if (tb[NFTA_EXPR_DATA]) {
3122 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3124 type->policy, NULL);
3128 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
3130 if (type->select_ops != NULL) {
3131 ops = type->select_ops(ctx,
3132 (const struct nlattr * const *)info->tb);
3135 #ifdef CONFIG_MODULES
3137 if (nft_expr_type_request_module(ctx->net,
3139 tb[NFTA_EXPR_NAME]) != -EAGAIN)
3153 module_put(type->owner);
3157 int nft_expr_inner_parse(const struct nft_ctx *ctx, const struct nlattr *nla,
3158 struct nft_expr_info *info)
3160 struct nlattr *tb[NFTA_EXPR_MAX + 1];
3161 const struct nft_expr_type *type;
3164 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
3165 nft_expr_policy, NULL);
3169 if (!tb[NFTA_EXPR_DATA] || !tb[NFTA_EXPR_NAME])
3172 type = __nft_expr_type_get(ctx->family, tb[NFTA_EXPR_NAME]);
3176 if (!type->inner_ops)
3179 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
3181 type->policy, NULL);
3186 info->ops = type->inner_ops;
3194 static int nf_tables_newexpr(const struct nft_ctx *ctx,
3195 const struct nft_expr_info *expr_info,
3196 struct nft_expr *expr)
3198 const struct nft_expr_ops *ops = expr_info->ops;
3203 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
3214 static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
3215 struct nft_expr *expr)
3217 const struct nft_expr_type *type = expr->ops->type;
3219 if (expr->ops->destroy)
3220 expr->ops->destroy(ctx, expr);
3221 module_put(type->owner);
3224 static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
3225 const struct nlattr *nla)
3227 struct nft_expr_info expr_info;
3228 struct nft_expr *expr;
3229 struct module *owner;
3232 err = nf_tables_expr_parse(ctx, nla, &expr_info);
3234 goto err_expr_parse;
3237 if (!(expr_info.ops->type->flags & NFT_EXPR_STATEFUL))
3238 goto err_expr_stateful;
3241 expr = kzalloc(expr_info.ops->size, GFP_KERNEL_ACCOUNT);
3243 goto err_expr_stateful;
3245 err = nf_tables_newexpr(ctx, &expr_info, expr);
3253 owner = expr_info.ops->type->owner;
3254 if (expr_info.ops->type->release_ops)
3255 expr_info.ops->type->release_ops(expr_info.ops);
3259 return ERR_PTR(err);
3262 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
3266 if (src->ops->clone) {
3267 dst->ops = src->ops;
3268 err = src->ops->clone(dst, src);
3272 memcpy(dst, src, src->ops->size);
3275 __module_get(src->ops->type->owner);
3280 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
3282 nf_tables_expr_destroy(ctx, expr);
3290 static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
3293 struct nft_rule *rule;
3295 // FIXME: this sucks
3296 list_for_each_entry_rcu(rule, &chain->rules, list) {
3297 if (handle == rule->handle)
3301 return ERR_PTR(-ENOENT);
3304 static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
3305 const struct nlattr *nla)
3308 return ERR_PTR(-EINVAL);
3310 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
3313 static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
3314 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
3315 .len = NFT_TABLE_MAXNAMELEN - 1 },
3316 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
3317 .len = NFT_CHAIN_MAXNAMELEN - 1 },
3318 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
3319 [NFTA_RULE_EXPRESSIONS] = NLA_POLICY_NESTED_ARRAY(nft_expr_policy),
3320 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
3321 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
3322 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
3323 .len = NFT_USERDATA_MAXLEN },
3324 [NFTA_RULE_ID] = { .type = NLA_U32 },
3325 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
3326 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
3329 static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
3330 u32 portid, u32 seq, int event,
3331 u32 flags, int family,
3332 const struct nft_table *table,
3333 const struct nft_chain *chain,
3334 const struct nft_rule *rule, u64 handle,
3337 struct nlmsghdr *nlh;
3338 const struct nft_expr *expr, *next;
3339 struct nlattr *list;
3340 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
3342 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
3345 goto nla_put_failure;
3347 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
3348 goto nla_put_failure;
3349 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
3350 goto nla_put_failure;
3351 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
3353 goto nla_put_failure;
3355 if (event != NFT_MSG_DELRULE && handle) {
3356 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
3358 goto nla_put_failure;
3361 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
3362 nft_flow_rule_stats(chain, rule);
3364 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
3366 goto nla_put_failure;
3367 nft_rule_for_each_expr(expr, next, rule) {
3368 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
3369 goto nla_put_failure;
3371 nla_nest_end(skb, list);
3374 struct nft_userdata *udata = nft_userdata(rule);
3375 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
3377 goto nla_put_failure;
3380 nlmsg_end(skb, nlh);
3384 nlmsg_trim(skb, nlh);
3388 static void nf_tables_rule_notify(const struct nft_ctx *ctx,
3389 const struct nft_rule *rule, int event)
3391 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3392 const struct nft_rule *prule;
3393 struct sk_buff *skb;
3399 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
3402 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
3406 if (event == NFT_MSG_NEWRULE &&
3407 !list_is_first(&rule->list, &ctx->chain->rules) &&
3408 !list_is_last(&rule->list, &ctx->chain->rules)) {
3409 prule = list_prev_entry(rule, list);
3410 handle = prule->handle;
3412 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
3413 flags |= NLM_F_APPEND;
3414 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
3415 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
3417 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
3418 event, flags, ctx->family, ctx->table,
3419 ctx->chain, rule, handle, false);
3425 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
3428 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
3431 static void audit_log_rule_reset(const struct nft_table *table,
3432 unsigned int base_seq,
3433 unsigned int nentries)
3435 char *buf = kasprintf(GFP_ATOMIC, "%s:%u",
3436 table->name, base_seq);
3438 audit_log_nfcfg(buf, table->family, nentries,
3439 AUDIT_NFT_OP_RULE_RESET, GFP_ATOMIC);
3443 struct nft_rule_dump_ctx {
3450 static int __nf_tables_dump_rules(struct sk_buff *skb,
3452 struct netlink_callback *cb,
3453 const struct nft_table *table,
3454 const struct nft_chain *chain)
3456 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
3457 struct net *net = sock_net(skb->sk);
3458 const struct nft_rule *rule, *prule;
3459 unsigned int entries = 0;
3464 list_for_each_entry_rcu(rule, &chain->rules, list) {
3465 if (!nft_is_active(net, rule))
3467 if (*idx < ctx->s_idx)
3470 handle = prule->handle;
3474 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3477 NLM_F_MULTI | NLM_F_APPEND,
3479 table, chain, rule, handle, ctx->reset) < 0) {
3484 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3491 if (ctx->reset && entries)
3492 audit_log_rule_reset(table, cb->seq, entries);
3497 static int nf_tables_dump_rules(struct sk_buff *skb,
3498 struct netlink_callback *cb)
3500 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
3501 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
3502 struct nft_table *table;
3503 const struct nft_chain *chain;
3504 unsigned int idx = 0;
3505 struct net *net = sock_net(skb->sk);
3506 int family = nfmsg->nfgen_family;
3507 struct nftables_pernet *nft_net;
3510 nft_net = nft_pernet(net);
3511 cb->seq = READ_ONCE(nft_net->base_seq);
3513 list_for_each_entry_rcu(table, &nft_net->tables, list) {
3514 if (family != NFPROTO_UNSPEC && family != table->family)
3517 if (ctx->table && strcmp(ctx->table, table->name) != 0)
3520 if (ctx->table && ctx->chain) {
3521 struct rhlist_head *list, *tmp;
3523 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3524 nft_chain_ht_params);
3528 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3529 if (!nft_is_active(net, chain))
3531 __nf_tables_dump_rules(skb, &idx,
3538 list_for_each_entry_rcu(chain, &table->chains, list) {
3539 if (__nf_tables_dump_rules(skb, &idx,
3554 static int nf_tables_dumpreset_rules(struct sk_buff *skb,
3555 struct netlink_callback *cb)
3557 struct nftables_pernet *nft_net = nft_pernet(sock_net(skb->sk));
3560 /* Mutex is held is to prevent that two concurrent dump-and-reset calls
3561 * do not underrun counters and quotas. The commit_mutex is used for
3562 * the lack a better lock, this is not transaction path.
3564 mutex_lock(&nft_net->commit_mutex);
3565 ret = nf_tables_dump_rules(skb, cb);
3566 mutex_unlock(&nft_net->commit_mutex);
3571 static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3573 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
3574 const struct nlattr * const *nla = cb->data;
3576 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
3578 if (nla[NFTA_RULE_TABLE]) {
3579 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE], GFP_ATOMIC);
3583 if (nla[NFTA_RULE_CHAIN]) {
3584 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN], GFP_ATOMIC);
3593 static int nf_tables_dumpreset_rules_start(struct netlink_callback *cb)
3595 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
3599 return nf_tables_dump_rules_start(cb);
3602 static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3604 struct nft_rule_dump_ctx *ctx = (void *)cb->ctx;
3611 /* called with rcu_read_lock held */
3612 static struct sk_buff *
3613 nf_tables_getrule_single(u32 portid, const struct nfnl_info *info,
3614 const struct nlattr * const nla[], bool reset)
3616 struct netlink_ext_ack *extack = info->extack;
3617 u8 genmask = nft_genmask_cur(info->net);
3618 u8 family = info->nfmsg->nfgen_family;
3619 const struct nft_chain *chain;
3620 const struct nft_rule *rule;
3621 struct net *net = info->net;
3622 struct nft_table *table;
3623 struct sk_buff *skb2;
3626 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
3627 if (IS_ERR(table)) {
3628 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3629 return ERR_CAST(table);
3632 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
3633 if (IS_ERR(chain)) {
3634 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3635 return ERR_CAST(chain);
3638 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
3640 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3641 return ERR_CAST(rule);
3644 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3646 return ERR_PTR(-ENOMEM);
3648 err = nf_tables_fill_rule_info(skb2, net, portid,
3649 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
3650 family, table, chain, rule, 0, reset);
3653 return ERR_PTR(err);
3659 static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3660 const struct nlattr * const nla[])
3662 u32 portid = NETLINK_CB(skb).portid;
3663 struct net *net = info->net;
3664 struct sk_buff *skb2;
3666 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3667 struct netlink_dump_control c = {
3668 .start= nf_tables_dump_rules_start,
3669 .dump = nf_tables_dump_rules,
3670 .done = nf_tables_dump_rules_done,
3671 .module = THIS_MODULE,
3672 .data = (void *)nla,
3675 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3678 skb2 = nf_tables_getrule_single(portid, info, nla, false);
3680 return PTR_ERR(skb2);
3682 return nfnetlink_unicast(skb2, net, portid);
3685 static int nf_tables_getrule_reset(struct sk_buff *skb,
3686 const struct nfnl_info *info,
3687 const struct nlattr * const nla[])
3689 struct nftables_pernet *nft_net = nft_pernet(info->net);
3690 u32 portid = NETLINK_CB(skb).portid;
3691 struct net *net = info->net;
3692 struct sk_buff *skb2;
3695 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3696 struct netlink_dump_control c = {
3697 .start= nf_tables_dumpreset_rules_start,
3698 .dump = nf_tables_dumpreset_rules,
3699 .done = nf_tables_dump_rules_done,
3700 .module = THIS_MODULE,
3701 .data = (void *)nla,
3704 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3707 if (!try_module_get(THIS_MODULE))
3710 mutex_lock(&nft_net->commit_mutex);
3711 skb2 = nf_tables_getrule_single(portid, info, nla, true);
3712 mutex_unlock(&nft_net->commit_mutex);
3714 module_put(THIS_MODULE);
3717 return PTR_ERR(skb2);
3719 buf = kasprintf(GFP_ATOMIC, "%.*s:%u",
3720 nla_len(nla[NFTA_RULE_TABLE]),
3721 (char *)nla_data(nla[NFTA_RULE_TABLE]),
3723 audit_log_nfcfg(buf, info->nfmsg->nfgen_family, 1,
3724 AUDIT_NFT_OP_RULE_RESET, GFP_ATOMIC);
3727 return nfnetlink_unicast(skb2, net, portid);
3730 void nf_tables_rule_destroy(const struct nft_ctx *ctx, struct nft_rule *rule)
3732 struct nft_expr *expr, *next;
3735 * Careful: some expressions might not be initialized in case this
3736 * is called on error from nf_tables_newrule().
3738 expr = nft_expr_first(rule);
3739 while (nft_expr_more(rule, expr)) {
3740 next = nft_expr_next(expr);
3741 nf_tables_expr_destroy(ctx, expr);
3747 static void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
3749 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
3750 nf_tables_rule_destroy(ctx, rule);
3753 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3755 struct nft_expr *expr, *last;
3756 const struct nft_data *data;
3757 struct nft_rule *rule;
3760 if (ctx->level == NFT_JUMP_STACK_SIZE)
3763 list_for_each_entry(rule, &chain->rules, list) {
3764 if (fatal_signal_pending(current))
3767 if (!nft_is_active_next(ctx->net, rule))
3770 nft_rule_for_each_expr(expr, last, rule) {
3771 if (!expr->ops->validate)
3774 err = expr->ops->validate(ctx, expr, &data);
3782 EXPORT_SYMBOL_GPL(nft_chain_validate);
3784 static int nft_table_validate(struct net *net, const struct nft_table *table)
3786 struct nft_chain *chain;
3787 struct nft_ctx ctx = {
3789 .family = table->family,
3793 list_for_each_entry(chain, &table->chains, list) {
3794 if (!nft_is_base_chain(chain))
3798 err = nft_chain_validate(&ctx, chain);
3808 int nft_setelem_validate(const struct nft_ctx *ctx, struct nft_set *set,
3809 const struct nft_set_iter *iter,
3810 struct nft_set_elem *elem)
3812 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
3813 struct nft_ctx *pctx = (struct nft_ctx *)ctx;
3814 const struct nft_data *data;
3817 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
3818 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
3821 data = nft_set_ext_data(ext);
3822 switch (data->verdict.code) {
3826 err = nft_chain_validate(ctx, data->verdict.chain);
3838 int nft_set_catchall_validate(const struct nft_ctx *ctx, struct nft_set *set)
3840 u8 genmask = nft_genmask_next(ctx->net);
3841 struct nft_set_elem_catchall *catchall;
3842 struct nft_set_elem elem;
3843 struct nft_set_ext *ext;
3846 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
3847 ext = nft_set_elem_ext(set, catchall->elem);
3848 if (!nft_set_elem_active(ext, genmask))
3851 elem.priv = catchall->elem;
3852 ret = nft_setelem_validate(ctx, set, NULL, &elem);
3860 static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
3861 const struct nft_chain *chain,
3862 const struct nlattr *nla);
3864 #define NFT_RULE_MAXEXPRS 128
3866 static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3867 const struct nlattr * const nla[])
3869 struct nftables_pernet *nft_net = nft_pernet(info->net);
3870 struct netlink_ext_ack *extack = info->extack;
3871 unsigned int size, i, n, ulen = 0, usize = 0;
3872 u8 genmask = nft_genmask_next(info->net);
3873 struct nft_rule *rule, *old_rule = NULL;
3874 struct nft_expr_info *expr_info = NULL;
3875 u8 family = info->nfmsg->nfgen_family;
3876 struct nft_flow_rule *flow = NULL;
3877 struct net *net = info->net;
3878 struct nft_userdata *udata;
3879 struct nft_table *table;
3880 struct nft_chain *chain;
3881 struct nft_trans *trans;
3882 u64 handle, pos_handle;
3883 struct nft_expr *expr;
3888 lockdep_assert_held(&nft_net->commit_mutex);
3890 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3891 NETLINK_CB(skb).portid);
3892 if (IS_ERR(table)) {
3893 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3894 return PTR_ERR(table);
3897 if (nla[NFTA_RULE_CHAIN]) {
3898 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3900 if (IS_ERR(chain)) {
3901 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3902 return PTR_ERR(chain);
3905 } else if (nla[NFTA_RULE_CHAIN_ID]) {
3906 chain = nft_chain_lookup_byid(net, table, nla[NFTA_RULE_CHAIN_ID],
3908 if (IS_ERR(chain)) {
3909 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3910 return PTR_ERR(chain);
3916 if (nft_chain_is_bound(chain))
3919 if (nla[NFTA_RULE_HANDLE]) {
3920 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
3921 rule = __nft_rule_lookup(chain, handle);
3923 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3924 return PTR_ERR(rule);
3927 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
3928 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3931 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
3936 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3937 info->nlh->nlmsg_flags & NLM_F_REPLACE)
3939 handle = nf_tables_alloc_handle(table);
3941 if (nla[NFTA_RULE_POSITION]) {
3942 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3943 old_rule = __nft_rule_lookup(chain, pos_handle);
3944 if (IS_ERR(old_rule)) {
3945 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3946 return PTR_ERR(old_rule);
3948 } else if (nla[NFTA_RULE_POSITION_ID]) {
3949 old_rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_POSITION_ID]);
3950 if (IS_ERR(old_rule)) {
3951 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3952 return PTR_ERR(old_rule);
3957 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
3961 if (nla[NFTA_RULE_EXPRESSIONS]) {
3962 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3963 sizeof(struct nft_expr_info),
3968 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3970 if (nla_type(tmp) != NFTA_LIST_ELEM)
3971 goto err_release_expr;
3972 if (n == NFT_RULE_MAXEXPRS)
3973 goto err_release_expr;
3974 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
3976 NL_SET_BAD_ATTR(extack, tmp);
3977 goto err_release_expr;
3979 size += expr_info[n].ops->size;
3983 /* Check for overflow of dlen field */
3985 if (size >= 1 << 12)
3986 goto err_release_expr;
3988 if (nla[NFTA_RULE_USERDATA]) {
3989 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
3991 usize = sizeof(struct nft_userdata) + ulen;
3995 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL_ACCOUNT);
3997 goto err_release_expr;
3999 nft_activate_next(net, rule);
4001 rule->handle = handle;
4003 rule->udata = ulen ? 1 : 0;
4006 udata = nft_userdata(rule);
4007 udata->len = ulen - 1;
4008 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
4011 expr = nft_expr_first(rule);
4012 for (i = 0; i < n; i++) {
4013 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
4015 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
4016 goto err_release_rule;
4019 if (expr_info[i].ops->validate)
4020 nft_validate_state_update(table, NFT_VALIDATE_NEED);
4022 expr_info[i].ops = NULL;
4023 expr = nft_expr_next(expr);
4026 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
4027 flow = nft_flow_rule_create(net, rule);
4029 err = PTR_ERR(flow);
4030 goto err_release_rule;
4034 if (!nft_use_inc(&chain->use)) {
4036 goto err_release_rule;
4039 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
4040 if (nft_chain_binding(chain)) {
4042 goto err_destroy_flow_rule;
4045 err = nft_delrule(&ctx, old_rule);
4047 goto err_destroy_flow_rule;
4049 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
4050 if (trans == NULL) {
4052 goto err_destroy_flow_rule;
4054 list_add_tail_rcu(&rule->list, &old_rule->list);
4056 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
4059 goto err_destroy_flow_rule;
4062 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
4064 list_add_rcu(&rule->list, &old_rule->list);
4066 list_add_tail_rcu(&rule->list, &chain->rules);
4069 list_add_tail_rcu(&rule->list, &old_rule->list);
4071 list_add_rcu(&rule->list, &chain->rules);
4077 nft_trans_flow_rule(trans) = flow;
4079 if (table->validate_state == NFT_VALIDATE_DO)
4080 return nft_table_validate(net, table);
4084 err_destroy_flow_rule:
4085 nft_use_dec_restore(&chain->use);
4087 nft_flow_rule_destroy(flow);
4089 nft_rule_expr_deactivate(&ctx, rule, NFT_TRANS_PREPARE_ERROR);
4090 nf_tables_rule_destroy(&ctx, rule);
4092 for (i = 0; i < n; i++) {
4093 if (expr_info[i].ops) {
4094 module_put(expr_info[i].ops->type->owner);
4095 if (expr_info[i].ops->type->release_ops)
4096 expr_info[i].ops->type->release_ops(expr_info[i].ops);
4104 static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
4105 const struct nft_chain *chain,
4106 const struct nlattr *nla)
4108 struct nftables_pernet *nft_net = nft_pernet(net);
4109 u32 id = ntohl(nla_get_be32(nla));
4110 struct nft_trans *trans;
4112 list_for_each_entry(trans, &nft_net->commit_list, list) {
4113 if (trans->msg_type == NFT_MSG_NEWRULE &&
4114 trans->ctx.chain == chain &&
4115 id == nft_trans_rule_id(trans))
4116 return nft_trans_rule(trans);
4118 return ERR_PTR(-ENOENT);
4121 static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
4122 const struct nlattr * const nla[])
4124 struct netlink_ext_ack *extack = info->extack;
4125 u8 genmask = nft_genmask_next(info->net);
4126 u8 family = info->nfmsg->nfgen_family;
4127 struct nft_chain *chain = NULL;
4128 struct net *net = info->net;
4129 struct nft_table *table;
4130 struct nft_rule *rule;
4134 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
4135 NETLINK_CB(skb).portid);
4136 if (IS_ERR(table)) {
4137 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
4138 return PTR_ERR(table);
4141 if (nla[NFTA_RULE_CHAIN]) {
4142 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
4144 if (IS_ERR(chain)) {
4145 if (PTR_ERR(chain) == -ENOENT &&
4146 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4149 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
4150 return PTR_ERR(chain);
4152 if (nft_chain_binding(chain))
4156 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
4159 if (nla[NFTA_RULE_HANDLE]) {
4160 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
4162 if (PTR_ERR(rule) == -ENOENT &&
4163 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
4166 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
4167 return PTR_ERR(rule);
4170 err = nft_delrule(&ctx, rule);
4171 } else if (nla[NFTA_RULE_ID]) {
4172 rule = nft_rule_lookup_byid(net, chain, nla[NFTA_RULE_ID]);
4174 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
4175 return PTR_ERR(rule);
4178 err = nft_delrule(&ctx, rule);
4180 err = nft_delrule_by_chain(&ctx);
4183 list_for_each_entry(chain, &table->chains, list) {
4184 if (!nft_is_active_next(net, chain))
4186 if (nft_chain_binding(chain))
4190 err = nft_delrule_by_chain(&ctx);
4202 static const struct nft_set_type *nft_set_types[] = {
4203 &nft_set_hash_fast_type,
4205 &nft_set_rhash_type,
4206 &nft_set_bitmap_type,
4207 &nft_set_rbtree_type,
4208 #if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
4209 &nft_set_pipapo_avx2_type,
4211 &nft_set_pipapo_type,
4214 #define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
4215 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
4218 static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
4220 return (flags & type->features) == (flags & NFT_SET_FEATURES);
4224 * Select a set implementation based on the data characteristics and the
4225 * given policy. The total memory use might not be known if no size is
4226 * given, in that case the amount of memory per element is used.
4228 static const struct nft_set_ops *
4229 nft_select_set_ops(const struct nft_ctx *ctx,
4230 const struct nlattr * const nla[],
4231 const struct nft_set_desc *desc)
4233 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
4234 const struct nft_set_ops *ops, *bops;
4235 struct nft_set_estimate est, best;
4236 const struct nft_set_type *type;
4240 lockdep_assert_held(&nft_net->commit_mutex);
4241 lockdep_nfnl_nft_mutex_not_held();
4243 if (nla[NFTA_SET_FLAGS] != NULL)
4244 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4251 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
4252 type = nft_set_types[i];
4255 if (!nft_set_ops_candidate(type, flags))
4257 if (!ops->estimate(desc, flags, &est))
4260 switch (desc->policy) {
4261 case NFT_SET_POL_PERFORMANCE:
4262 if (est.lookup < best.lookup)
4264 if (est.lookup == best.lookup &&
4265 est.space < best.space)
4268 case NFT_SET_POL_MEMORY:
4270 if (est.space < best.space)
4272 if (est.space == best.space &&
4273 est.lookup < best.lookup)
4275 } else if (est.size < best.size || !bops) {
4290 return ERR_PTR(-EOPNOTSUPP);
4293 static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
4294 [NFTA_SET_TABLE] = { .type = NLA_STRING,
4295 .len = NFT_TABLE_MAXNAMELEN - 1 },
4296 [NFTA_SET_NAME] = { .type = NLA_STRING,
4297 .len = NFT_SET_MAXNAMELEN - 1 },
4298 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
4299 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
4300 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
4301 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
4302 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
4303 [NFTA_SET_POLICY] = { .type = NLA_U32 },
4304 [NFTA_SET_DESC] = { .type = NLA_NESTED },
4305 [NFTA_SET_ID] = { .type = NLA_U32 },
4306 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
4307 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
4308 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
4309 .len = NFT_USERDATA_MAXLEN },
4310 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
4311 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
4312 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
4313 [NFTA_SET_EXPRESSIONS] = NLA_POLICY_NESTED_ARRAY(nft_expr_policy),
4316 static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4317 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4320 static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
4321 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
4322 [NFTA_SET_DESC_CONCAT] = NLA_POLICY_NESTED_ARRAY(nft_concat_policy),
4325 static struct nft_set *nft_set_lookup(const struct nft_table *table,
4326 const struct nlattr *nla, u8 genmask)
4328 struct nft_set *set;
4331 return ERR_PTR(-EINVAL);
4333 list_for_each_entry_rcu(set, &table->sets, list) {
4334 if (!nla_strcmp(nla, set->name) &&
4335 nft_active_genmask(set, genmask))
4338 return ERR_PTR(-ENOENT);
4341 static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
4342 const struct nlattr *nla,
4345 struct nft_set *set;
4347 list_for_each_entry(set, &table->sets, list) {
4348 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
4349 nft_active_genmask(set, genmask))
4352 return ERR_PTR(-ENOENT);
4355 static struct nft_set *nft_set_lookup_byid(const struct net *net,
4356 const struct nft_table *table,
4357 const struct nlattr *nla, u8 genmask)
4359 struct nftables_pernet *nft_net = nft_pernet(net);
4360 u32 id = ntohl(nla_get_be32(nla));
4361 struct nft_trans *trans;
4363 list_for_each_entry(trans, &nft_net->commit_list, list) {
4364 if (trans->msg_type == NFT_MSG_NEWSET) {
4365 struct nft_set *set = nft_trans_set(trans);
4367 if (id == nft_trans_set_id(trans) &&
4368 set->table == table &&
4369 nft_active_genmask(set, genmask))
4373 return ERR_PTR(-ENOENT);
4376 struct nft_set *nft_set_lookup_global(const struct net *net,
4377 const struct nft_table *table,
4378 const struct nlattr *nla_set_name,
4379 const struct nlattr *nla_set_id,
4382 struct nft_set *set;
4384 set = nft_set_lookup(table, nla_set_name, genmask);
4389 set = nft_set_lookup_byid(net, table, nla_set_id, genmask);
4393 EXPORT_SYMBOL_GPL(nft_set_lookup_global);
4395 static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
4398 const struct nft_set *i;
4400 unsigned long *inuse;
4401 unsigned int n = 0, min = 0;
4403 p = strchr(name, '%');
4405 if (p[1] != 'd' || strchr(p + 2, '%'))
4408 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
4412 list_for_each_entry(i, &ctx->table->sets, list) {
4415 if (!nft_is_active_next(ctx->net, i))
4417 if (!sscanf(i->name, name, &tmp))
4419 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
4422 set_bit(tmp - min, inuse);
4425 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
4426 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
4427 min += BITS_PER_BYTE * PAGE_SIZE;
4428 memset(inuse, 0, PAGE_SIZE);
4431 free_page((unsigned long)inuse);
4434 set->name = kasprintf(GFP_KERNEL_ACCOUNT, name, min + n);
4438 list_for_each_entry(i, &ctx->table->sets, list) {
4439 if (!nft_is_active_next(ctx->net, i))
4441 if (!strcmp(set->name, i->name)) {
4450 int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
4452 u64 ms = be64_to_cpu(nla_get_be64(nla));
4453 u64 max = (u64)(~((u64)0));
4455 max = div_u64(max, NSEC_PER_MSEC);
4459 ms *= NSEC_PER_MSEC;
4460 *result = nsecs_to_jiffies64(ms);
4464 __be64 nf_jiffies64_to_msecs(u64 input)
4466 return cpu_to_be64(jiffies64_to_msecs(input));
4469 static int nf_tables_fill_set_concat(struct sk_buff *skb,
4470 const struct nft_set *set)
4472 struct nlattr *concat, *field;
4475 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
4479 for (i = 0; i < set->field_count; i++) {
4480 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4484 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
4485 htonl(set->field_len[i])))
4488 nla_nest_end(skb, field);
4491 nla_nest_end(skb, concat);
4496 static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
4497 const struct nft_set *set, u16 event, u16 flags)
4499 u64 timeout = READ_ONCE(set->timeout);
4500 u32 gc_int = READ_ONCE(set->gc_int);
4501 u32 portid = ctx->portid;
4502 struct nlmsghdr *nlh;
4503 struct nlattr *nest;
4507 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
4508 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
4509 NFNETLINK_V0, nft_base_seq(ctx->net));
4511 goto nla_put_failure;
4513 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
4514 goto nla_put_failure;
4515 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
4516 goto nla_put_failure;
4517 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
4519 goto nla_put_failure;
4521 if (event == NFT_MSG_DELSET) {
4522 nlmsg_end(skb, nlh);
4526 if (set->flags != 0)
4527 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
4528 goto nla_put_failure;
4530 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
4531 goto nla_put_failure;
4532 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
4533 goto nla_put_failure;
4534 if (set->flags & NFT_SET_MAP) {
4535 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
4536 goto nla_put_failure;
4537 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
4538 goto nla_put_failure;
4540 if (set->flags & NFT_SET_OBJECT &&
4541 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
4542 goto nla_put_failure;
4545 nla_put_be64(skb, NFTA_SET_TIMEOUT,
4546 nf_jiffies64_to_msecs(timeout),
4548 goto nla_put_failure;
4550 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(gc_int)))
4551 goto nla_put_failure;
4553 if (set->policy != NFT_SET_POL_PERFORMANCE) {
4554 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
4555 goto nla_put_failure;
4559 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
4560 goto nla_put_failure;
4562 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
4564 goto nla_put_failure;
4566 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
4567 goto nla_put_failure;
4569 if (set->field_count > 1 &&
4570 nf_tables_fill_set_concat(skb, set))
4571 goto nla_put_failure;
4573 nla_nest_end(skb, nest);
4575 if (set->num_exprs == 1) {
4576 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
4577 if (nf_tables_fill_expr_info(skb, set->exprs[0], false) < 0)
4578 goto nla_put_failure;
4580 nla_nest_end(skb, nest);
4581 } else if (set->num_exprs > 1) {
4582 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
4584 goto nla_put_failure;
4586 for (i = 0; i < set->num_exprs; i++) {
4587 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
4588 set->exprs[i], false) < 0)
4589 goto nla_put_failure;
4591 nla_nest_end(skb, nest);
4594 nlmsg_end(skb, nlh);
4598 nlmsg_trim(skb, nlh);
4602 static void nf_tables_set_notify(const struct nft_ctx *ctx,
4603 const struct nft_set *set, int event,
4606 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
4607 u32 portid = ctx->portid;
4608 struct sk_buff *skb;
4613 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
4616 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
4620 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4621 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4623 err = nf_tables_fill_set(skb, ctx, set, event, flags);
4629 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
4632 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
4635 static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
4637 const struct nft_set *set;
4638 unsigned int idx, s_idx = cb->args[0];
4639 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4640 struct net *net = sock_net(skb->sk);
4641 struct nft_ctx *ctx = cb->data, ctx_set;
4642 struct nftables_pernet *nft_net;
4648 nft_net = nft_pernet(net);
4649 cb->seq = READ_ONCE(nft_net->base_seq);
4651 list_for_each_entry_rcu(table, &nft_net->tables, list) {
4652 if (ctx->family != NFPROTO_UNSPEC &&
4653 ctx->family != table->family)
4656 if (ctx->table && ctx->table != table)
4660 if (cur_table != table)
4666 list_for_each_entry_rcu(set, &table->sets, list) {
4669 if (!nft_is_active(net, set))
4673 ctx_set.table = table;
4674 ctx_set.family = table->family;
4676 if (nf_tables_fill_set(skb, &ctx_set, set,
4680 cb->args[2] = (unsigned long) table;
4683 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4696 static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4698 struct nft_ctx *ctx_dump = NULL;
4700 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4701 if (ctx_dump == NULL)
4704 cb->data = ctx_dump;
4708 static int nf_tables_dump_sets_done(struct netlink_callback *cb)
4714 /* called with rcu_read_lock held */
4715 static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4716 const struct nlattr * const nla[])
4718 struct netlink_ext_ack *extack = info->extack;
4719 u8 genmask = nft_genmask_cur(info->net);
4720 u8 family = info->nfmsg->nfgen_family;
4721 struct nft_table *table = NULL;
4722 struct net *net = info->net;
4723 const struct nft_set *set;
4724 struct sk_buff *skb2;
4728 if (nla[NFTA_SET_TABLE]) {
4729 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4731 if (IS_ERR(table)) {
4732 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4733 return PTR_ERR(table);
4737 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4739 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
4740 struct netlink_dump_control c = {
4741 .start = nf_tables_dump_sets_start,
4742 .dump = nf_tables_dump_sets,
4743 .done = nf_tables_dump_sets_done,
4745 .module = THIS_MODULE,
4748 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
4751 /* Only accept unspec with dump */
4752 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
4753 return -EAFNOSUPPORT;
4754 if (!nla[NFTA_SET_TABLE])
4757 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
4759 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4760 return PTR_ERR(set);
4763 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
4767 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4769 goto err_fill_set_info;
4771 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
4778 static int nft_set_desc_concat_parse(const struct nlattr *attr,
4779 struct nft_set_desc *desc)
4781 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4785 if (desc->field_count >= ARRAY_SIZE(desc->field_len))
4788 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4789 nft_concat_policy, NULL);
4793 if (!tb[NFTA_SET_FIELD_LEN])
4796 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
4797 if (!len || len > U8_MAX)
4800 desc->field_len[desc->field_count++] = len;
4805 static int nft_set_desc_concat(struct nft_set_desc *desc,
4806 const struct nlattr *nla)
4808 struct nlattr *attr;
4812 nla_for_each_nested(attr, nla, rem) {
4813 if (nla_type(attr) != NFTA_LIST_ELEM)
4816 err = nft_set_desc_concat_parse(attr, desc);
4821 for (i = 0; i < desc->field_count; i++)
4822 num_regs += DIV_ROUND_UP(desc->field_len[i], sizeof(u32));
4824 if (num_regs > NFT_REG32_COUNT)
4830 static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
4831 const struct nlattr *nla)
4833 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4836 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4837 nft_set_desc_policy, NULL);
4841 if (da[NFTA_SET_DESC_SIZE] != NULL)
4842 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
4843 if (da[NFTA_SET_DESC_CONCAT])
4844 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
4849 static int nft_set_expr_alloc(struct nft_ctx *ctx, struct nft_set *set,
4850 const struct nlattr * const *nla,
4851 struct nft_expr **exprs, int *num_exprs,
4854 struct nft_expr *expr;
4857 if (nla[NFTA_SET_EXPR]) {
4858 expr = nft_set_elem_expr_alloc(ctx, set, nla[NFTA_SET_EXPR]);
4860 err = PTR_ERR(expr);
4861 goto err_set_expr_alloc;
4865 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4869 if (!(flags & NFT_SET_EXPR)) {
4871 goto err_set_expr_alloc;
4874 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4875 if (i == NFT_SET_EXPR_MAX) {
4877 goto err_set_expr_alloc;
4879 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4881 goto err_set_expr_alloc;
4883 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
4885 err = PTR_ERR(expr);
4886 goto err_set_expr_alloc;
4896 for (i = 0; i < *num_exprs; i++)
4897 nft_expr_destroy(ctx, exprs[i]);
4902 static bool nft_set_is_same(const struct nft_set *set,
4903 const struct nft_set_desc *desc,
4904 struct nft_expr *exprs[], u32 num_exprs, u32 flags)
4908 if (set->ktype != desc->ktype ||
4909 set->dtype != desc->dtype ||
4910 set->flags != flags ||
4911 set->klen != desc->klen ||
4912 set->dlen != desc->dlen ||
4913 set->field_count != desc->field_count ||
4914 set->num_exprs != num_exprs)
4917 for (i = 0; i < desc->field_count; i++) {
4918 if (set->field_len[i] != desc->field_len[i])
4922 for (i = 0; i < num_exprs; i++) {
4923 if (set->exprs[i]->ops != exprs[i]->ops)
4930 static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4931 const struct nlattr * const nla[])
4933 struct netlink_ext_ack *extack = info->extack;
4934 u8 genmask = nft_genmask_next(info->net);
4935 u8 family = info->nfmsg->nfgen_family;
4936 const struct nft_set_ops *ops;
4937 struct net *net = info->net;
4938 struct nft_set_desc desc;
4939 struct nft_table *table;
4940 unsigned char *udata;
4941 struct nft_set *set;
4951 if (nla[NFTA_SET_TABLE] == NULL ||
4952 nla[NFTA_SET_NAME] == NULL ||
4953 nla[NFTA_SET_KEY_LEN] == NULL ||
4954 nla[NFTA_SET_ID] == NULL)
4957 memset(&desc, 0, sizeof(desc));
4959 desc.ktype = NFT_DATA_VALUE;
4960 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
4961 desc.ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4962 if ((desc.ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
4966 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
4967 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
4971 if (nla[NFTA_SET_FLAGS] != NULL) {
4972 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4973 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
4974 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
4975 NFT_SET_MAP | NFT_SET_EVAL |
4976 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
4978 /* Only one of these operations is supported */
4979 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4980 (NFT_SET_MAP | NFT_SET_OBJECT))
4982 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4983 (NFT_SET_EVAL | NFT_SET_OBJECT))
4988 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4989 if (!(flags & NFT_SET_MAP))
4992 desc.dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4993 if ((desc.dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4994 desc.dtype != NFT_DATA_VERDICT)
4997 if (desc.dtype != NFT_DATA_VERDICT) {
4998 if (nla[NFTA_SET_DATA_LEN] == NULL)
5000 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
5001 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
5004 desc.dlen = sizeof(struct nft_verdict);
5005 } else if (flags & NFT_SET_MAP)
5008 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
5009 if (!(flags & NFT_SET_OBJECT))
5012 desc.objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
5013 if (desc.objtype == NFT_OBJECT_UNSPEC ||
5014 desc.objtype > NFT_OBJECT_MAX)
5016 } else if (flags & NFT_SET_OBJECT)
5019 desc.objtype = NFT_OBJECT_UNSPEC;
5022 if (nla[NFTA_SET_TIMEOUT] != NULL) {
5023 if (!(flags & NFT_SET_TIMEOUT))
5026 if (flags & NFT_SET_ANONYMOUS)
5029 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &desc.timeout);
5034 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
5035 if (!(flags & NFT_SET_TIMEOUT))
5038 if (flags & NFT_SET_ANONYMOUS)
5041 desc.gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
5044 desc.policy = NFT_SET_POL_PERFORMANCE;
5045 if (nla[NFTA_SET_POLICY] != NULL)
5046 desc.policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
5048 if (nla[NFTA_SET_DESC] != NULL) {
5049 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
5053 if (desc.field_count > 1 && !(flags & NFT_SET_CONCAT))
5055 } else if (flags & NFT_SET_CONCAT) {
5059 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
5062 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
5063 NETLINK_CB(skb).portid);
5064 if (IS_ERR(table)) {
5065 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
5066 return PTR_ERR(table);
5069 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5071 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
5073 if (PTR_ERR(set) != -ENOENT) {
5074 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
5075 return PTR_ERR(set);
5078 struct nft_expr *exprs[NFT_SET_EXPR_MAX] = {};
5080 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
5081 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
5084 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
5087 if (nft_set_is_anonymous(set))
5090 err = nft_set_expr_alloc(&ctx, set, nla, exprs, &num_exprs, flags);
5095 if (!nft_set_is_same(set, &desc, exprs, num_exprs, flags)) {
5096 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
5100 for (i = 0; i < num_exprs; i++)
5101 nft_expr_destroy(&ctx, exprs[i]);
5106 return __nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set, &desc);
5109 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
5112 ops = nft_select_set_ops(&ctx, nla, &desc);
5114 return PTR_ERR(ops);
5117 if (nla[NFTA_SET_USERDATA])
5118 udlen = nla_len(nla[NFTA_SET_USERDATA]);
5121 if (ops->privsize != NULL)
5122 size = ops->privsize(nla, &desc);
5123 alloc_size = sizeof(*set) + size + udlen;
5124 if (alloc_size < size || alloc_size > INT_MAX)
5127 if (!nft_use_inc(&table->use))
5130 set = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT);
5136 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL_ACCOUNT);
5142 err = nf_tables_set_alloc_name(&ctx, set, name);
5149 udata = set->data + size;
5150 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
5153 INIT_LIST_HEAD(&set->bindings);
5154 INIT_LIST_HEAD(&set->catchall_list);
5155 refcount_set(&set->refs, 1);
5157 write_pnet(&set->net, net);
5159 set->ktype = desc.ktype;
5160 set->klen = desc.klen;
5161 set->dtype = desc.dtype;
5162 set->objtype = desc.objtype;
5163 set->dlen = desc.dlen;
5165 set->size = desc.size;
5166 set->policy = desc.policy;
5169 set->timeout = desc.timeout;
5170 set->gc_int = desc.gc_int;
5172 set->field_count = desc.field_count;
5173 for (i = 0; i < desc.field_count; i++)
5174 set->field_len[i] = desc.field_len[i];
5176 err = ops->init(set, &desc, nla);
5180 err = nft_set_expr_alloc(&ctx, set, nla, set->exprs, &num_exprs, flags);
5182 goto err_set_destroy;
5184 set->num_exprs = num_exprs;
5185 set->handle = nf_tables_alloc_handle(table);
5186 INIT_LIST_HEAD(&set->pending_update);
5188 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
5190 goto err_set_expr_alloc;
5192 list_add_tail_rcu(&set->list, &table->sets);
5197 for (i = 0; i < set->num_exprs; i++)
5198 nft_expr_destroy(&ctx, set->exprs[i]);
5200 ops->destroy(&ctx, set);
5206 nft_use_dec_restore(&table->use);
5211 static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
5212 struct nft_set *set)
5214 struct nft_set_elem_catchall *next, *catchall;
5216 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5217 list_del_rcu(&catchall->list);
5218 nf_tables_set_elem_destroy(ctx, set, catchall->elem);
5219 kfree_rcu(catchall, rcu);
5223 static void nft_set_put(struct nft_set *set)
5225 if (refcount_dec_and_test(&set->refs)) {
5231 static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
5235 if (WARN_ON(set->use > 0))
5238 for (i = 0; i < set->num_exprs; i++)
5239 nft_expr_destroy(ctx, set->exprs[i]);
5241 set->ops->destroy(ctx, set);
5242 nft_set_catchall_destroy(ctx, set);
5246 static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
5247 const struct nlattr * const nla[])
5249 struct netlink_ext_ack *extack = info->extack;
5250 u8 genmask = nft_genmask_next(info->net);
5251 u8 family = info->nfmsg->nfgen_family;
5252 struct net *net = info->net;
5253 const struct nlattr *attr;
5254 struct nft_table *table;
5255 struct nft_set *set;
5258 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
5259 return -EAFNOSUPPORT;
5261 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
5262 genmask, NETLINK_CB(skb).portid);
5263 if (IS_ERR(table)) {
5264 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
5265 return PTR_ERR(table);
5268 if (nla[NFTA_SET_HANDLE]) {
5269 attr = nla[NFTA_SET_HANDLE];
5270 set = nft_set_lookup_byhandle(table, attr, genmask);
5272 attr = nla[NFTA_SET_NAME];
5273 set = nft_set_lookup(table, attr, genmask);
5277 if (PTR_ERR(set) == -ENOENT &&
5278 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
5281 NL_SET_BAD_ATTR(extack, attr);
5282 return PTR_ERR(set);
5285 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
5286 atomic_read(&set->nelems) > 0)) {
5287 NL_SET_BAD_ATTR(extack, attr);
5291 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5293 return nft_delset(&ctx, set);
5296 static int nft_validate_register_store(const struct nft_ctx *ctx,
5297 enum nft_registers reg,
5298 const struct nft_data *data,
5299 enum nft_data_types type,
5302 static int nft_setelem_data_validate(const struct nft_ctx *ctx,
5303 struct nft_set *set,
5304 struct nft_set_elem *elem)
5306 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5307 enum nft_registers dreg;
5309 dreg = nft_type_to_reg(set->dtype);
5310 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
5311 set->dtype == NFT_DATA_VERDICT ?
5312 NFT_DATA_VERDICT : NFT_DATA_VALUE,
5316 static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
5317 struct nft_set *set,
5318 const struct nft_set_iter *iter,
5319 struct nft_set_elem *elem)
5321 return nft_setelem_data_validate(ctx, set, elem);
5324 static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
5325 struct nft_set *set)
5327 u8 genmask = nft_genmask_next(ctx->net);
5328 struct nft_set_elem_catchall *catchall;
5329 struct nft_set_elem elem;
5330 struct nft_set_ext *ext;
5333 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5334 ext = nft_set_elem_ext(set, catchall->elem);
5335 if (!nft_set_elem_active(ext, genmask))
5338 elem.priv = catchall->elem;
5339 ret = nft_setelem_data_validate(ctx, set, &elem);
5347 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
5348 struct nft_set_binding *binding)
5350 struct nft_set_binding *i;
5351 struct nft_set_iter iter;
5353 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
5356 if (binding->flags & NFT_SET_MAP) {
5357 /* If the set is already bound to the same chain all
5358 * jumps are already validated for that chain.
5360 list_for_each_entry(i, &set->bindings, list) {
5361 if (i->flags & NFT_SET_MAP &&
5362 i->chain == binding->chain)
5366 iter.genmask = nft_genmask_next(ctx->net);
5370 iter.fn = nf_tables_bind_check_setelem;
5372 set->ops->walk(ctx, set, &iter);
5374 iter.err = nft_set_catchall_bind_check(ctx, set);
5380 if (!nft_use_inc(&set->use))
5383 binding->chain = ctx->chain;
5384 list_add_tail_rcu(&binding->list, &set->bindings);
5385 nft_set_trans_bind(ctx, set);
5389 EXPORT_SYMBOL_GPL(nf_tables_bind_set);
5391 static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
5392 struct nft_set_binding *binding, bool event)
5394 list_del_rcu(&binding->list);
5396 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
5397 list_del_rcu(&set->list);
5399 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
5404 static void nft_setelem_data_activate(const struct net *net,
5405 const struct nft_set *set,
5406 struct nft_set_elem *elem);
5408 static int nft_mapelem_activate(const struct nft_ctx *ctx,
5409 struct nft_set *set,
5410 const struct nft_set_iter *iter,
5411 struct nft_set_elem *elem)
5413 nft_setelem_data_activate(ctx->net, set, elem);
5418 static void nft_map_catchall_activate(const struct nft_ctx *ctx,
5419 struct nft_set *set)
5421 u8 genmask = nft_genmask_next(ctx->net);
5422 struct nft_set_elem_catchall *catchall;
5423 struct nft_set_elem elem;
5424 struct nft_set_ext *ext;
5426 list_for_each_entry(catchall, &set->catchall_list, list) {
5427 ext = nft_set_elem_ext(set, catchall->elem);
5428 if (!nft_set_elem_active(ext, genmask))
5431 elem.priv = catchall->elem;
5432 nft_setelem_data_activate(ctx->net, set, &elem);
5437 static void nft_map_activate(const struct nft_ctx *ctx, struct nft_set *set)
5439 struct nft_set_iter iter = {
5440 .genmask = nft_genmask_next(ctx->net),
5441 .fn = nft_mapelem_activate,
5444 set->ops->walk(ctx, set, &iter);
5445 WARN_ON_ONCE(iter.err);
5447 nft_map_catchall_activate(ctx, set);
5450 void nf_tables_activate_set(const struct nft_ctx *ctx, struct nft_set *set)
5452 if (nft_set_is_anonymous(set)) {
5453 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5454 nft_map_activate(ctx, set);
5456 nft_clear(ctx->net, set);
5459 nft_use_inc_restore(&set->use);
5461 EXPORT_SYMBOL_GPL(nf_tables_activate_set);
5463 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
5464 struct nft_set_binding *binding,
5465 enum nft_trans_phase phase)
5468 case NFT_TRANS_PREPARE_ERROR:
5469 nft_set_trans_unbind(ctx, set);
5470 if (nft_set_is_anonymous(set))
5471 nft_deactivate_next(ctx->net, set);
5473 list_del_rcu(&binding->list);
5475 nft_use_dec(&set->use);
5477 case NFT_TRANS_PREPARE:
5478 if (nft_set_is_anonymous(set)) {
5479 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5480 nft_map_deactivate(ctx, set);
5482 nft_deactivate_next(ctx->net, set);
5484 nft_use_dec(&set->use);
5486 case NFT_TRANS_ABORT:
5487 case NFT_TRANS_RELEASE:
5488 if (nft_set_is_anonymous(set) &&
5489 set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
5490 nft_map_deactivate(ctx, set);
5492 nft_use_dec(&set->use);
5495 nf_tables_unbind_set(ctx, set, binding,
5496 phase == NFT_TRANS_COMMIT);
5499 EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
5501 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
5503 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
5504 nft_set_destroy(ctx, set);
5506 EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
5508 const struct nft_set_ext_type nft_set_ext_types[] = {
5509 [NFT_SET_EXT_KEY] = {
5510 .align = __alignof__(u32),
5512 [NFT_SET_EXT_DATA] = {
5513 .align = __alignof__(u32),
5515 [NFT_SET_EXT_EXPRESSIONS] = {
5516 .align = __alignof__(struct nft_set_elem_expr),
5518 [NFT_SET_EXT_OBJREF] = {
5519 .len = sizeof(struct nft_object *),
5520 .align = __alignof__(struct nft_object *),
5522 [NFT_SET_EXT_FLAGS] = {
5524 .align = __alignof__(u8),
5526 [NFT_SET_EXT_TIMEOUT] = {
5528 .align = __alignof__(u64),
5530 [NFT_SET_EXT_EXPIRATION] = {
5532 .align = __alignof__(u64),
5534 [NFT_SET_EXT_USERDATA] = {
5535 .len = sizeof(struct nft_userdata),
5536 .align = __alignof__(struct nft_userdata),
5538 [NFT_SET_EXT_KEY_END] = {
5539 .align = __alignof__(u32),
5547 static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
5548 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
5549 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
5550 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
5551 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
5552 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
5553 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
5554 .len = NFT_USERDATA_MAXLEN },
5555 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
5556 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
5557 .len = NFT_OBJ_MAXNAMELEN - 1 },
5558 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
5559 [NFTA_SET_ELEM_EXPRESSIONS] = NLA_POLICY_NESTED_ARRAY(nft_expr_policy),
5562 static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
5563 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
5564 .len = NFT_TABLE_MAXNAMELEN - 1 },
5565 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
5566 .len = NFT_SET_MAXNAMELEN - 1 },
5567 [NFTA_SET_ELEM_LIST_ELEMENTS] = NLA_POLICY_NESTED_ARRAY(nft_set_elem_policy),
5568 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
5571 static int nft_set_elem_expr_dump(struct sk_buff *skb,
5572 const struct nft_set *set,
5573 const struct nft_set_ext *ext,
5576 struct nft_set_elem_expr *elem_expr;
5577 u32 size, num_exprs = 0;
5578 struct nft_expr *expr;
5579 struct nlattr *nest;
5581 elem_expr = nft_set_ext_expr(ext);
5582 nft_setelem_expr_foreach(expr, elem_expr, size)
5585 if (num_exprs == 1) {
5586 expr = nft_setelem_expr_at(elem_expr, 0);
5587 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr, reset) < 0)
5591 } else if (num_exprs > 1) {
5592 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
5594 goto nla_put_failure;
5596 nft_setelem_expr_foreach(expr, elem_expr, size) {
5597 expr = nft_setelem_expr_at(elem_expr, size);
5598 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr, reset) < 0)
5599 goto nla_put_failure;
5601 nla_nest_end(skb, nest);
5609 static int nf_tables_fill_setelem(struct sk_buff *skb,
5610 const struct nft_set *set,
5611 const struct nft_set_elem *elem,
5614 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5615 unsigned char *b = skb_tail_pointer(skb);
5616 struct nlattr *nest;
5618 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
5620 goto nla_put_failure;
5622 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
5623 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
5624 NFT_DATA_VALUE, set->klen) < 0)
5625 goto nla_put_failure;
5627 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
5628 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
5629 NFT_DATA_VALUE, set->klen) < 0)
5630 goto nla_put_failure;
5632 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5633 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
5634 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
5636 goto nla_put_failure;
5638 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
5639 nft_set_elem_expr_dump(skb, set, ext, reset))
5640 goto nla_put_failure;
5642 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5643 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
5644 (*nft_set_ext_obj(ext))->key.name) < 0)
5645 goto nla_put_failure;
5647 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5648 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
5649 htonl(*nft_set_ext_flags(ext))))
5650 goto nla_put_failure;
5652 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
5653 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
5654 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
5656 goto nla_put_failure;
5658 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5659 u64 expires, now = get_jiffies_64();
5661 expires = *nft_set_ext_expiration(ext);
5662 if (time_before64(now, expires))
5667 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
5668 nf_jiffies64_to_msecs(expires),
5670 goto nla_put_failure;
5673 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
5674 struct nft_userdata *udata;
5676 udata = nft_set_ext_userdata(ext);
5677 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
5678 udata->len + 1, udata->data))
5679 goto nla_put_failure;
5682 nla_nest_end(skb, nest);
5690 struct nft_set_dump_args {
5691 const struct netlink_callback *cb;
5692 struct nft_set_iter iter;
5693 struct sk_buff *skb;
5697 static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
5698 struct nft_set *set,
5699 const struct nft_set_iter *iter,
5700 struct nft_set_elem *elem)
5702 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5703 struct nft_set_dump_args *args;
5705 if (nft_set_elem_expired(ext))
5708 args = container_of(iter, struct nft_set_dump_args, iter);
5709 return nf_tables_fill_setelem(args->skb, set, elem, args->reset);
5712 static void audit_log_nft_set_reset(const struct nft_table *table,
5713 unsigned int base_seq,
5714 unsigned int nentries)
5716 char *buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, base_seq);
5718 audit_log_nfcfg(buf, table->family, nentries,
5719 AUDIT_NFT_OP_SETELEM_RESET, GFP_ATOMIC);
5723 struct nft_set_dump_ctx {
5724 const struct nft_set *set;
5728 static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
5729 const struct nft_set *set, bool reset,
5730 unsigned int base_seq)
5732 struct nft_set_elem_catchall *catchall;
5733 u8 genmask = nft_genmask_cur(net);
5734 struct nft_set_elem elem;
5735 struct nft_set_ext *ext;
5738 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5739 ext = nft_set_elem_ext(set, catchall->elem);
5740 if (!nft_set_elem_active(ext, genmask) ||
5741 nft_set_elem_expired(ext))
5744 elem.priv = catchall->elem;
5745 ret = nf_tables_fill_setelem(skb, set, &elem, reset);
5747 audit_log_nft_set_reset(set->table, base_seq, 1);
5754 static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
5756 struct nft_set_dump_ctx *dump_ctx = cb->data;
5757 struct net *net = sock_net(skb->sk);
5758 struct nftables_pernet *nft_net;
5759 struct nft_table *table;
5760 struct nft_set *set;
5761 struct nft_set_dump_args args;
5762 bool set_found = false;
5763 struct nlmsghdr *nlh;
5764 struct nlattr *nest;
5770 nft_net = nft_pernet(net);
5771 cb->seq = READ_ONCE(nft_net->base_seq);
5773 list_for_each_entry_rcu(table, &nft_net->tables, list) {
5774 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
5775 dump_ctx->ctx.family != table->family)
5778 if (table != dump_ctx->ctx.table)
5781 list_for_each_entry_rcu(set, &table->sets, list) {
5782 if (set == dump_ctx->set) {
5795 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
5796 portid = NETLINK_CB(cb->skb).portid;
5797 seq = cb->nlh->nlmsg_seq;
5799 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
5800 table->family, NFNETLINK_V0, nft_base_seq(net));
5802 goto nla_put_failure;
5804 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
5805 goto nla_put_failure;
5806 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
5807 goto nla_put_failure;
5809 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
5811 goto nla_put_failure;
5813 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETSETELEM_RESET)
5819 args.iter.genmask = nft_genmask_cur(net);
5820 args.iter.skip = cb->args[0];
5821 args.iter.count = 0;
5823 args.iter.fn = nf_tables_dump_setelem;
5824 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
5826 if (!args.iter.err && args.iter.count == cb->args[0])
5827 args.iter.err = nft_set_catchall_dump(net, skb, set,
5829 nla_nest_end(skb, nest);
5830 nlmsg_end(skb, nlh);
5832 if (reset && args.iter.count > args.iter.skip)
5833 audit_log_nft_set_reset(table, cb->seq,
5834 args.iter.count - args.iter.skip);
5838 if (args.iter.err && args.iter.err != -EMSGSIZE)
5839 return args.iter.err;
5840 if (args.iter.count == cb->args[0])
5843 cb->args[0] = args.iter.count;
5851 static int nf_tables_dump_set_start(struct netlink_callback *cb)
5853 struct nft_set_dump_ctx *dump_ctx = cb->data;
5855 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5857 return cb->data ? 0 : -ENOMEM;
5860 static int nf_tables_dump_set_done(struct netlink_callback *cb)
5866 static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5867 const struct nft_ctx *ctx, u32 seq,
5868 u32 portid, int event, u16 flags,
5869 const struct nft_set *set,
5870 const struct nft_set_elem *elem,
5873 struct nlmsghdr *nlh;
5874 struct nlattr *nest;
5877 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
5878 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5879 NFNETLINK_V0, nft_base_seq(ctx->net));
5881 goto nla_put_failure;
5883 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5884 goto nla_put_failure;
5885 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5886 goto nla_put_failure;
5888 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
5890 goto nla_put_failure;
5892 err = nf_tables_fill_setelem(skb, set, elem, reset);
5894 goto nla_put_failure;
5896 nla_nest_end(skb, nest);
5898 nlmsg_end(skb, nlh);
5902 nlmsg_trim(skb, nlh);
5906 static int nft_setelem_parse_flags(const struct nft_set *set,
5907 const struct nlattr *attr, u32 *flags)
5912 *flags = ntohl(nla_get_be32(attr));
5913 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5915 if (!(set->flags & NFT_SET_INTERVAL) &&
5916 *flags & NFT_SET_ELEM_INTERVAL_END)
5918 if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
5919 (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5925 static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5926 struct nft_data *key, struct nlattr *attr)
5928 struct nft_data_desc desc = {
5929 .type = NFT_DATA_VALUE,
5930 .size = NFT_DATA_VALUE_MAXLEN,
5934 return nft_data_init(ctx, key, &desc, attr);
5937 static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5938 struct nft_data_desc *desc,
5939 struct nft_data *data,
5940 struct nlattr *attr)
5944 if (set->dtype == NFT_DATA_VERDICT)
5945 dtype = NFT_DATA_VERDICT;
5947 dtype = NFT_DATA_VALUE;
5950 desc->size = NFT_DATA_VALUE_MAXLEN;
5951 desc->len = set->dlen;
5952 desc->flags = NFT_DATA_DESC_SETELEM;
5954 return nft_data_init(ctx, data, desc, attr);
5957 static void *nft_setelem_catchall_get(const struct net *net,
5958 const struct nft_set *set)
5960 struct nft_set_elem_catchall *catchall;
5961 u8 genmask = nft_genmask_cur(net);
5962 struct nft_set_ext *ext;
5965 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5966 ext = nft_set_elem_ext(set, catchall->elem);
5967 if (!nft_set_elem_active(ext, genmask) ||
5968 nft_set_elem_expired(ext))
5971 priv = catchall->elem;
5978 static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5979 struct nft_set_elem *elem, u32 flags)
5983 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5984 priv = set->ops->get(ctx->net, set, elem, flags);
5986 return PTR_ERR(priv);
5988 priv = nft_setelem_catchall_get(ctx->net, set);
5997 static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5998 const struct nlattr *attr, bool reset)
6000 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
6001 struct nft_set_elem elem;
6002 struct sk_buff *skb;
6006 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6007 nft_set_elem_policy, NULL);
6011 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6015 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
6018 if (nla[NFTA_SET_ELEM_KEY]) {
6019 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6020 nla[NFTA_SET_ELEM_KEY]);
6025 if (nla[NFTA_SET_ELEM_KEY_END]) {
6026 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6027 nla[NFTA_SET_ELEM_KEY_END]);
6032 err = nft_setelem_get(ctx, set, &elem, flags);
6037 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
6041 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
6042 NFT_MSG_NEWSETELEM, 0, set, &elem,
6045 goto err_fill_setelem;
6047 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
6054 /* called with rcu_read_lock held */
6055 static int nf_tables_getsetelem(struct sk_buff *skb,
6056 const struct nfnl_info *info,
6057 const struct nlattr * const nla[])
6059 struct netlink_ext_ack *extack = info->extack;
6060 u8 genmask = nft_genmask_cur(info->net);
6061 u8 family = info->nfmsg->nfgen_family;
6062 int rem, err = 0, nelems = 0;
6063 struct net *net = info->net;
6064 struct nft_table *table;
6065 struct nft_set *set;
6066 struct nlattr *attr;
6070 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6072 if (IS_ERR(table)) {
6073 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6074 return PTR_ERR(table);
6077 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
6079 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_SET]);
6080 return PTR_ERR(set);
6083 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6085 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
6086 struct netlink_dump_control c = {
6087 .start = nf_tables_dump_set_start,
6088 .dump = nf_tables_dump_set,
6089 .done = nf_tables_dump_set_done,
6090 .module = THIS_MODULE,
6092 struct nft_set_dump_ctx dump_ctx = {
6098 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
6101 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6104 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETSETELEM_RESET)
6107 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6108 err = nft_get_set_elem(&ctx, set, attr, reset);
6110 NL_SET_BAD_ATTR(extack, attr);
6117 audit_log_nft_set_reset(table, nft_pernet(net)->base_seq,
6123 static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
6124 const struct nft_set *set,
6125 const struct nft_set_elem *elem,
6128 struct nftables_pernet *nft_net;
6129 struct net *net = ctx->net;
6130 u32 portid = ctx->portid;
6131 struct sk_buff *skb;
6135 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
6138 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6142 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
6143 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
6145 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
6152 nft_net = nft_pernet(net);
6153 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
6156 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
6159 static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
6161 struct nft_set *set)
6163 struct nft_trans *trans;
6165 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
6169 nft_trans_elem_set(trans) = set;
6173 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
6174 const struct nft_set *set,
6175 const struct nlattr *attr)
6177 struct nft_expr *expr;
6180 expr = nft_expr_init(ctx, attr);
6185 if (expr->ops->type->flags & NFT_EXPR_GC) {
6186 if (set->flags & NFT_SET_TIMEOUT)
6187 goto err_set_elem_expr;
6188 if (!set->ops->gc_init)
6189 goto err_set_elem_expr;
6190 set->ops->gc_init(set);
6196 nft_expr_destroy(ctx, expr);
6197 return ERR_PTR(err);
6200 static int nft_set_ext_check(const struct nft_set_ext_tmpl *tmpl, u8 id, u32 len)
6202 len += nft_set_ext_types[id].len;
6203 if (len > tmpl->ext_len[id] ||
6210 static int nft_set_ext_memcpy(const struct nft_set_ext_tmpl *tmpl, u8 id,
6211 void *to, const void *from, u32 len)
6213 if (nft_set_ext_check(tmpl, id, len) < 0)
6216 memcpy(to, from, len);
6221 void *nft_set_elem_init(const struct nft_set *set,
6222 const struct nft_set_ext_tmpl *tmpl,
6223 const u32 *key, const u32 *key_end,
6224 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
6226 struct nft_set_ext *ext;
6229 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
6231 return ERR_PTR(-ENOMEM);
6233 ext = nft_set_elem_ext(set, elem);
6234 nft_set_ext_init(ext, tmpl);
6236 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
6237 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY,
6238 nft_set_ext_key(ext), key, set->klen) < 0)
6241 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
6242 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_KEY_END,
6243 nft_set_ext_key_end(ext), key_end, set->klen) < 0)
6246 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6247 nft_set_ext_memcpy(tmpl, NFT_SET_EXT_DATA,
6248 nft_set_ext_data(ext), data, set->dlen) < 0)
6251 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
6252 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
6253 if (expiration == 0)
6254 *nft_set_ext_expiration(ext) += timeout;
6256 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
6257 *nft_set_ext_timeout(ext) = timeout;
6264 return ERR_PTR(-EINVAL);
6267 static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6268 struct nft_expr *expr)
6270 if (expr->ops->destroy_clone) {
6271 expr->ops->destroy_clone(ctx, expr);
6272 module_put(expr->ops->type->owner);
6274 nf_tables_expr_destroy(ctx, expr);
6278 static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
6279 struct nft_set_elem_expr *elem_expr)
6281 struct nft_expr *expr;
6284 nft_setelem_expr_foreach(expr, elem_expr, size)
6285 __nft_set_elem_expr_destroy(ctx, expr);
6288 /* Drop references and destroy. Called from gc, dynset and abort path. */
6289 void nft_set_elem_destroy(const struct nft_set *set, void *elem,
6292 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
6293 struct nft_ctx ctx = {
6294 .net = read_pnet(&set->net),
6295 .family = set->table->family,
6298 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
6299 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6300 nft_data_release(nft_set_ext_data(ext), set->dtype);
6301 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
6302 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
6304 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6305 nft_use_dec(&(*nft_set_ext_obj(ext))->use);
6308 EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
6310 /* Destroy element. References have been already dropped in the preparation
6311 * path via nft_setelem_data_deactivate().
6313 void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
6314 const struct nft_set *set, void *elem)
6316 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
6318 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
6319 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
6324 int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
6325 struct nft_expr *expr_array[])
6327 struct nft_expr *expr;
6330 for (i = 0; i < set->num_exprs; i++) {
6331 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL_ACCOUNT);
6335 err = nft_expr_clone(expr, set->exprs[i]);
6340 expr_array[i] = expr;
6346 for (k = i - 1; k >= 0; k--)
6347 nft_expr_destroy(ctx, expr_array[k]);
6352 static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
6353 const struct nft_set_ext_tmpl *tmpl,
6354 const struct nft_set_ext *ext,
6355 struct nft_expr *expr_array[],
6358 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
6359 u32 len = sizeof(struct nft_set_elem_expr);
6360 struct nft_expr *expr;
6366 for (i = 0; i < num_exprs; i++)
6367 len += expr_array[i]->ops->size;
6369 if (nft_set_ext_check(tmpl, NFT_SET_EXT_EXPRESSIONS, len) < 0)
6372 for (i = 0; i < num_exprs; i++) {
6373 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
6374 err = nft_expr_clone(expr, expr_array[i]);
6376 goto err_elem_expr_setup;
6378 elem_expr->size += expr_array[i]->ops->size;
6379 nft_expr_destroy(ctx, expr_array[i]);
6380 expr_array[i] = NULL;
6385 err_elem_expr_setup:
6386 for (; i < num_exprs; i++) {
6387 nft_expr_destroy(ctx, expr_array[i]);
6388 expr_array[i] = NULL;
6394 struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
6395 const struct nft_set *set)
6397 struct nft_set_elem_catchall *catchall;
6398 u8 genmask = nft_genmask_cur(net);
6399 struct nft_set_ext *ext;
6401 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6402 ext = nft_set_elem_ext(set, catchall->elem);
6403 if (nft_set_elem_active(ext, genmask) &&
6404 !nft_set_elem_expired(ext) &&
6405 !nft_set_elem_is_dead(ext))
6411 EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
6413 static int nft_setelem_catchall_insert(const struct net *net,
6414 struct nft_set *set,
6415 const struct nft_set_elem *elem,
6416 struct nft_set_ext **pext)
6418 struct nft_set_elem_catchall *catchall;
6419 u8 genmask = nft_genmask_next(net);
6420 struct nft_set_ext *ext;
6422 list_for_each_entry(catchall, &set->catchall_list, list) {
6423 ext = nft_set_elem_ext(set, catchall->elem);
6424 if (nft_set_elem_active(ext, genmask)) {
6430 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
6434 catchall->elem = elem->priv;
6435 list_add_tail_rcu(&catchall->list, &set->catchall_list);
6440 static int nft_setelem_insert(const struct net *net,
6441 struct nft_set *set,
6442 const struct nft_set_elem *elem,
6443 struct nft_set_ext **ext, unsigned int flags)
6447 if (flags & NFT_SET_ELEM_CATCHALL)
6448 ret = nft_setelem_catchall_insert(net, set, elem, ext);
6450 ret = set->ops->insert(net, set, elem, ext);
6455 static bool nft_setelem_is_catchall(const struct nft_set *set,
6456 const struct nft_set_elem *elem)
6458 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6460 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
6461 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
6467 static void nft_setelem_activate(struct net *net, struct nft_set *set,
6468 struct nft_set_elem *elem)
6470 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6472 if (nft_setelem_is_catchall(set, elem)) {
6473 nft_set_elem_change_active(net, set, ext);
6475 set->ops->activate(net, set, elem);
6479 static int nft_setelem_catchall_deactivate(const struct net *net,
6480 struct nft_set *set,
6481 struct nft_set_elem *elem)
6483 struct nft_set_elem_catchall *catchall;
6484 struct nft_set_ext *ext;
6486 list_for_each_entry(catchall, &set->catchall_list, list) {
6487 ext = nft_set_elem_ext(set, catchall->elem);
6488 if (!nft_is_active(net, ext))
6492 elem->priv = catchall->elem;
6493 nft_set_elem_change_active(net, set, ext);
6500 static int __nft_setelem_deactivate(const struct net *net,
6501 struct nft_set *set,
6502 struct nft_set_elem *elem)
6506 priv = set->ops->deactivate(net, set, elem);
6517 static int nft_setelem_deactivate(const struct net *net,
6518 struct nft_set *set,
6519 struct nft_set_elem *elem, u32 flags)
6523 if (flags & NFT_SET_ELEM_CATCHALL)
6524 ret = nft_setelem_catchall_deactivate(net, set, elem);
6526 ret = __nft_setelem_deactivate(net, set, elem);
6531 static void nft_setelem_catchall_remove(const struct net *net,
6532 const struct nft_set *set,
6533 const struct nft_set_elem *elem)
6535 struct nft_set_elem_catchall *catchall, *next;
6537 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
6538 if (catchall->elem == elem->priv) {
6539 list_del_rcu(&catchall->list);
6540 kfree_rcu(catchall, rcu);
6546 static void nft_setelem_remove(const struct net *net,
6547 const struct nft_set *set,
6548 const struct nft_set_elem *elem)
6550 if (nft_setelem_is_catchall(set, elem))
6551 nft_setelem_catchall_remove(net, set, elem);
6553 set->ops->remove(net, set, elem);
6556 static bool nft_setelem_valid_key_end(const struct nft_set *set,
6557 struct nlattr **nla, u32 flags)
6559 if ((set->flags & (NFT_SET_CONCAT | NFT_SET_INTERVAL)) ==
6560 (NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
6561 if (flags & NFT_SET_ELEM_INTERVAL_END)
6564 if (nla[NFTA_SET_ELEM_KEY_END] &&
6565 flags & NFT_SET_ELEM_CATCHALL)
6568 if (nla[NFTA_SET_ELEM_KEY_END])
6575 static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
6576 const struct nlattr *attr, u32 nlmsg_flags)
6578 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
6579 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
6580 u8 genmask = nft_genmask_next(ctx->net);
6581 u32 flags = 0, size = 0, num_exprs = 0;
6582 struct nft_set_ext_tmpl tmpl;
6583 struct nft_set_ext *ext, *ext2;
6584 struct nft_set_elem elem;
6585 struct nft_set_binding *binding;
6586 struct nft_object *obj = NULL;
6587 struct nft_userdata *udata;
6588 struct nft_data_desc desc;
6589 enum nft_registers dreg;
6590 struct nft_trans *trans;
6596 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6597 nft_set_elem_policy, NULL);
6601 nft_set_ext_prepare(&tmpl);
6603 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6607 if (((flags & NFT_SET_ELEM_CATCHALL) && nla[NFTA_SET_ELEM_KEY]) ||
6608 (!(flags & NFT_SET_ELEM_CATCHALL) && !nla[NFTA_SET_ELEM_KEY]))
6612 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6617 if (set->flags & NFT_SET_MAP) {
6618 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
6619 !(flags & NFT_SET_ELEM_INTERVAL_END))
6622 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6626 if (set->flags & NFT_SET_OBJECT) {
6627 if (!nla[NFTA_SET_ELEM_OBJREF] &&
6628 !(flags & NFT_SET_ELEM_INTERVAL_END))
6631 if (nla[NFTA_SET_ELEM_OBJREF])
6635 if (!nft_setelem_valid_key_end(set, nla, flags))
6638 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
6639 (nla[NFTA_SET_ELEM_DATA] ||
6640 nla[NFTA_SET_ELEM_OBJREF] ||
6641 nla[NFTA_SET_ELEM_TIMEOUT] ||
6642 nla[NFTA_SET_ELEM_EXPIRATION] ||
6643 nla[NFTA_SET_ELEM_USERDATA] ||
6644 nla[NFTA_SET_ELEM_EXPR] ||
6645 nla[NFTA_SET_ELEM_KEY_END] ||
6646 nla[NFTA_SET_ELEM_EXPRESSIONS]))
6650 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
6651 if (!(set->flags & NFT_SET_TIMEOUT))
6653 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
6657 } else if (set->flags & NFT_SET_TIMEOUT &&
6658 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
6659 timeout = READ_ONCE(set->timeout);
6663 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
6664 if (!(set->flags & NFT_SET_TIMEOUT))
6666 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
6672 if (nla[NFTA_SET_ELEM_EXPR]) {
6673 struct nft_expr *expr;
6675 if (set->num_exprs && set->num_exprs != 1)
6678 expr = nft_set_elem_expr_alloc(ctx, set,
6679 nla[NFTA_SET_ELEM_EXPR]);
6681 return PTR_ERR(expr);
6683 expr_array[0] = expr;
6686 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
6688 goto err_set_elem_expr;
6690 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
6691 struct nft_expr *expr;
6696 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
6697 if (i == NFT_SET_EXPR_MAX ||
6698 (set->num_exprs && set->num_exprs == i)) {
6700 goto err_set_elem_expr;
6702 if (nla_type(tmp) != NFTA_LIST_ELEM) {
6704 goto err_set_elem_expr;
6706 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
6708 err = PTR_ERR(expr);
6709 goto err_set_elem_expr;
6711 expr_array[i] = expr;
6714 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
6716 goto err_set_elem_expr;
6720 if (set->num_exprs && set->num_exprs != i) {
6722 goto err_set_elem_expr;
6724 } else if (set->num_exprs > 0 &&
6725 !(flags & NFT_SET_ELEM_INTERVAL_END)) {
6726 err = nft_set_elem_expr_clone(ctx, set, expr_array);
6728 goto err_set_elem_expr_clone;
6730 num_exprs = set->num_exprs;
6733 if (nla[NFTA_SET_ELEM_KEY]) {
6734 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6735 nla[NFTA_SET_ELEM_KEY]);
6737 goto err_set_elem_expr;
6739 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6744 if (nla[NFTA_SET_ELEM_KEY_END]) {
6745 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6746 nla[NFTA_SET_ELEM_KEY_END]);
6750 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6752 goto err_parse_key_end;
6756 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
6758 goto err_parse_key_end;
6760 if (timeout != READ_ONCE(set->timeout)) {
6761 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
6763 goto err_parse_key_end;
6768 for (i = 0; i < num_exprs; i++)
6769 size += expr_array[i]->ops->size;
6771 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
6772 sizeof(struct nft_set_elem_expr) + size);
6774 goto err_parse_key_end;
6777 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
6778 obj = nft_obj_lookup(ctx->net, ctx->table,
6779 nla[NFTA_SET_ELEM_OBJREF],
6780 set->objtype, genmask);
6784 goto err_parse_key_end;
6787 if (!nft_use_inc(&obj->use)) {
6790 goto err_parse_key_end;
6793 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
6795 goto err_parse_key_end;
6798 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
6799 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
6800 nla[NFTA_SET_ELEM_DATA]);
6802 goto err_parse_key_end;
6804 dreg = nft_type_to_reg(set->dtype);
6805 list_for_each_entry(binding, &set->bindings, list) {
6806 struct nft_ctx bind_ctx = {
6808 .family = ctx->family,
6809 .table = ctx->table,
6810 .chain = (struct nft_chain *)binding->chain,
6813 if (!(binding->flags & NFT_SET_MAP))
6816 err = nft_validate_register_store(&bind_ctx, dreg,
6818 desc.type, desc.len);
6820 goto err_parse_data;
6822 if (desc.type == NFT_DATA_VERDICT &&
6823 (elem.data.val.verdict.code == NFT_GOTO ||
6824 elem.data.val.verdict.code == NFT_JUMP))
6825 nft_validate_state_update(ctx->table,
6829 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
6831 goto err_parse_data;
6834 /* The full maximum length of userdata can exceed the maximum
6835 * offset value (U8_MAX) for following extensions, therefor it
6836 * must be the last extension added.
6839 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
6840 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
6842 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
6845 goto err_parse_data;
6849 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6850 elem.key_end.val.data, elem.data.val.data,
6851 timeout, expiration, GFP_KERNEL_ACCOUNT);
6852 if (IS_ERR(elem.priv)) {
6853 err = PTR_ERR(elem.priv);
6854 goto err_parse_data;
6857 ext = nft_set_elem_ext(set, elem.priv);
6859 *nft_set_ext_flags(ext) = flags;
6862 *nft_set_ext_obj(ext) = obj;
6865 if (nft_set_ext_check(&tmpl, NFT_SET_EXT_USERDATA, ulen) < 0) {
6869 udata = nft_set_ext_userdata(ext);
6870 udata->len = ulen - 1;
6871 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
6873 err = nft_set_elem_expr_setup(ctx, &tmpl, ext, expr_array, num_exprs);
6877 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
6878 if (trans == NULL) {
6883 ext->genmask = nft_genmask_cur(ctx->net);
6885 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
6887 if (err == -EEXIST) {
6888 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
6889 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
6890 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
6891 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
6892 goto err_element_clash;
6893 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
6894 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
6895 memcmp(nft_set_ext_data(ext),
6896 nft_set_ext_data(ext2), set->dlen) != 0) ||
6897 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
6898 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
6899 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
6900 goto err_element_clash;
6901 else if (!(nlmsg_flags & NLM_F_EXCL))
6903 } else if (err == -ENOTEMPTY) {
6904 /* ENOTEMPTY reports overlapping between this element
6905 * and an existing one.
6909 goto err_element_clash;
6912 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
6913 unsigned int max = set->size ? set->size + set->ndeact : UINT_MAX;
6915 if (!atomic_add_unless(&set->nelems, 1, max)) {
6921 nft_trans_elem(trans) = elem;
6922 nft_trans_commit_list_add_tail(ctx->net, trans);
6926 nft_setelem_remove(ctx->net, set, &elem);
6930 nf_tables_set_elem_destroy(ctx, set, elem.priv);
6932 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6933 nft_data_release(&elem.data.val, desc.type);
6936 nft_use_dec_restore(&obj->use);
6938 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6940 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
6942 for (i = 0; i < num_exprs && expr_array[i]; i++)
6943 nft_expr_destroy(ctx, expr_array[i]);
6944 err_set_elem_expr_clone:
6948 static int nf_tables_newsetelem(struct sk_buff *skb,
6949 const struct nfnl_info *info,
6950 const struct nlattr * const nla[])
6952 struct netlink_ext_ack *extack = info->extack;
6953 u8 genmask = nft_genmask_next(info->net);
6954 u8 family = info->nfmsg->nfgen_family;
6955 struct net *net = info->net;
6956 const struct nlattr *attr;
6957 struct nft_table *table;
6958 struct nft_set *set;
6962 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6965 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6966 genmask, NETLINK_CB(skb).portid);
6967 if (IS_ERR(table)) {
6968 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6969 return PTR_ERR(table);
6972 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
6973 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6975 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_SET]);
6976 return PTR_ERR(set);
6979 if (!list_empty(&set->bindings) &&
6980 (set->flags & (NFT_SET_CONSTANT | NFT_SET_ANONYMOUS)))
6983 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6985 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6986 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
6988 NL_SET_BAD_ATTR(extack, attr);
6993 if (table->validate_state == NFT_VALIDATE_DO)
6994 return nft_table_validate(net, table);
7000 * nft_data_hold - hold a nft_data item
7002 * @data: struct nft_data to release
7003 * @type: type of data
7005 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
7006 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
7007 * NFT_GOTO verdicts. This function must be called on active data objects
7008 * from the second phase of the commit protocol.
7010 void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
7012 struct nft_chain *chain;
7014 if (type == NFT_DATA_VERDICT) {
7015 switch (data->verdict.code) {
7018 chain = data->verdict.chain;
7019 nft_use_inc_restore(&chain->use);
7025 static void nft_setelem_data_activate(const struct net *net,
7026 const struct nft_set *set,
7027 struct nft_set_elem *elem)
7029 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
7031 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
7032 nft_data_hold(nft_set_ext_data(ext), set->dtype);
7033 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
7034 nft_use_inc_restore(&(*nft_set_ext_obj(ext))->use);
7037 void nft_setelem_data_deactivate(const struct net *net,
7038 const struct nft_set *set,
7039 struct nft_set_elem *elem)
7041 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
7043 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
7044 nft_data_release(nft_set_ext_data(ext), set->dtype);
7045 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
7046 nft_use_dec(&(*nft_set_ext_obj(ext))->use);
7049 static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
7050 const struct nlattr *attr)
7052 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
7053 struct nft_set_ext_tmpl tmpl;
7054 struct nft_set_elem elem;
7055 struct nft_set_ext *ext;
7056 struct nft_trans *trans;
7060 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
7061 nft_set_elem_policy, NULL);
7065 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
7069 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
7072 if (!nft_setelem_valid_key_end(set, nla, flags))
7075 nft_set_ext_prepare(&tmpl);
7078 err = nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
7083 if (nla[NFTA_SET_ELEM_KEY]) {
7084 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
7085 nla[NFTA_SET_ELEM_KEY]);
7089 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
7094 if (nla[NFTA_SET_ELEM_KEY_END]) {
7095 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
7096 nla[NFTA_SET_ELEM_KEY_END]);
7100 err = nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
7102 goto fail_elem_key_end;
7106 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
7107 elem.key_end.val.data, NULL, 0, 0,
7108 GFP_KERNEL_ACCOUNT);
7109 if (IS_ERR(elem.priv)) {
7110 err = PTR_ERR(elem.priv);
7111 goto fail_elem_key_end;
7114 ext = nft_set_elem_ext(set, elem.priv);
7116 *nft_set_ext_flags(ext) = flags;
7118 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
7122 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
7126 nft_setelem_data_deactivate(ctx->net, set, &elem);
7128 nft_trans_elem(trans) = elem;
7129 nft_trans_commit_list_add_tail(ctx->net, trans);
7137 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
7139 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
7143 static int nft_setelem_flush(const struct nft_ctx *ctx,
7144 struct nft_set *set,
7145 const struct nft_set_iter *iter,
7146 struct nft_set_elem *elem)
7148 struct nft_trans *trans;
7151 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
7152 sizeof(struct nft_trans_elem), GFP_ATOMIC);
7156 if (!set->ops->flush(ctx->net, set, elem->priv)) {
7162 nft_setelem_data_deactivate(ctx->net, set, elem);
7163 nft_trans_elem_set(trans) = set;
7164 nft_trans_elem(trans) = *elem;
7165 nft_trans_commit_list_add_tail(ctx->net, trans);
7173 static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
7174 struct nft_set *set,
7175 struct nft_set_elem *elem)
7177 struct nft_trans *trans;
7179 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
7180 sizeof(struct nft_trans_elem), GFP_KERNEL);
7184 nft_setelem_data_deactivate(ctx->net, set, elem);
7185 nft_trans_elem_set(trans) = set;
7186 nft_trans_elem(trans) = *elem;
7187 nft_trans_commit_list_add_tail(ctx->net, trans);
7192 static int nft_set_catchall_flush(const struct nft_ctx *ctx,
7193 struct nft_set *set)
7195 u8 genmask = nft_genmask_next(ctx->net);
7196 struct nft_set_elem_catchall *catchall;
7197 struct nft_set_elem elem;
7198 struct nft_set_ext *ext;
7201 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
7202 ext = nft_set_elem_ext(set, catchall->elem);
7203 if (!nft_set_elem_active(ext, genmask))
7206 elem.priv = catchall->elem;
7207 ret = __nft_set_catchall_flush(ctx, set, &elem);
7210 nft_set_elem_change_active(ctx->net, set, ext);
7216 static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
7218 struct nft_set_iter iter = {
7220 .fn = nft_setelem_flush,
7223 set->ops->walk(ctx, set, &iter);
7225 iter.err = nft_set_catchall_flush(ctx, set);
7230 static int nf_tables_delsetelem(struct sk_buff *skb,
7231 const struct nfnl_info *info,
7232 const struct nlattr * const nla[])
7234 struct netlink_ext_ack *extack = info->extack;
7235 u8 genmask = nft_genmask_next(info->net);
7236 u8 family = info->nfmsg->nfgen_family;
7237 struct net *net = info->net;
7238 const struct nlattr *attr;
7239 struct nft_table *table;
7240 struct nft_set *set;
7244 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
7245 genmask, NETLINK_CB(skb).portid);
7246 if (IS_ERR(table)) {
7247 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
7248 return PTR_ERR(table);
7251 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
7253 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_SET]);
7254 return PTR_ERR(set);
7257 if (nft_set_is_anonymous(set))
7260 if (!list_empty(&set->bindings) && (set->flags & NFT_SET_CONSTANT))
7263 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7265 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
7266 return nft_set_flush(&ctx, set, genmask);
7268 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
7269 err = nft_del_setelem(&ctx, set, attr);
7270 if (err == -ENOENT &&
7271 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
7275 NL_SET_BAD_ATTR(extack, attr);
7287 * nft_register_obj- register nf_tables stateful object type
7288 * @obj_type: object type
7290 * Registers the object type for use with nf_tables. Returns zero on
7291 * success or a negative errno code otherwise.
7293 int nft_register_obj(struct nft_object_type *obj_type)
7295 if (obj_type->type == NFT_OBJECT_UNSPEC)
7298 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7299 list_add_rcu(&obj_type->list, &nf_tables_objects);
7300 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7303 EXPORT_SYMBOL_GPL(nft_register_obj);
7306 * nft_unregister_obj - unregister nf_tables object type
7307 * @obj_type: object type
7309 * Unregisters the object type for use with nf_tables.
7311 void nft_unregister_obj(struct nft_object_type *obj_type)
7313 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7314 list_del_rcu(&obj_type->list);
7315 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7317 EXPORT_SYMBOL_GPL(nft_unregister_obj);
7319 struct nft_object *nft_obj_lookup(const struct net *net,
7320 const struct nft_table *table,
7321 const struct nlattr *nla, u32 objtype,
7324 struct nft_object_hash_key k = { .table = table };
7325 char search[NFT_OBJ_MAXNAMELEN];
7326 struct rhlist_head *tmp, *list;
7327 struct nft_object *obj;
7329 nla_strscpy(search, nla, sizeof(search));
7332 WARN_ON_ONCE(!rcu_read_lock_held() &&
7333 !lockdep_commit_lock_is_held(net));
7336 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
7340 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
7341 if (objtype == obj->ops->type->type &&
7342 nft_active_genmask(obj, genmask)) {
7349 return ERR_PTR(-ENOENT);
7351 EXPORT_SYMBOL_GPL(nft_obj_lookup);
7353 static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
7354 const struct nlattr *nla,
7355 u32 objtype, u8 genmask)
7357 struct nft_object *obj;
7359 list_for_each_entry(obj, &table->objects, list) {
7360 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
7361 objtype == obj->ops->type->type &&
7362 nft_active_genmask(obj, genmask))
7365 return ERR_PTR(-ENOENT);
7368 static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
7369 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
7370 .len = NFT_TABLE_MAXNAMELEN - 1 },
7371 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
7372 .len = NFT_OBJ_MAXNAMELEN - 1 },
7373 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
7374 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
7375 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
7376 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
7377 .len = NFT_USERDATA_MAXLEN },
7380 static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
7381 const struct nft_object_type *type,
7382 const struct nlattr *attr)
7385 const struct nft_object_ops *ops;
7386 struct nft_object *obj;
7389 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
7394 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
7395 type->policy, NULL);
7399 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
7402 if (type->select_ops) {
7403 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
7413 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL_ACCOUNT);
7417 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
7430 return ERR_PTR(err);
7433 static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
7434 struct nft_object *obj, bool reset)
7436 struct nlattr *nest;
7438 nest = nla_nest_start_noflag(skb, attr);
7440 goto nla_put_failure;
7441 if (obj->ops->dump(skb, obj, reset) < 0)
7442 goto nla_put_failure;
7443 nla_nest_end(skb, nest);
7450 static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
7452 const struct nft_object_type *type;
7454 list_for_each_entry(type, &nf_tables_objects, list) {
7455 if (objtype == type->type)
7461 static const struct nft_object_type *
7462 nft_obj_type_get(struct net *net, u32 objtype)
7464 const struct nft_object_type *type;
7466 type = __nft_obj_type_get(objtype);
7467 if (type != NULL && try_module_get(type->owner))
7470 lockdep_nfnl_nft_mutex_not_held();
7471 #ifdef CONFIG_MODULES
7473 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
7474 return ERR_PTR(-EAGAIN);
7477 return ERR_PTR(-ENOENT);
7480 static int nf_tables_updobj(const struct nft_ctx *ctx,
7481 const struct nft_object_type *type,
7482 const struct nlattr *attr,
7483 struct nft_object *obj)
7485 struct nft_object *newobj;
7486 struct nft_trans *trans;
7489 if (!try_module_get(type->owner))
7492 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
7493 sizeof(struct nft_trans_obj));
7497 newobj = nft_obj_init(ctx, type, attr);
7498 if (IS_ERR(newobj)) {
7499 err = PTR_ERR(newobj);
7500 goto err_free_trans;
7503 nft_trans_obj(trans) = obj;
7504 nft_trans_obj_update(trans) = true;
7505 nft_trans_obj_newobj(trans) = newobj;
7506 nft_trans_commit_list_add_tail(ctx->net, trans);
7513 module_put(type->owner);
7517 static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
7518 const struct nlattr * const nla[])
7520 struct netlink_ext_ack *extack = info->extack;
7521 u8 genmask = nft_genmask_next(info->net);
7522 u8 family = info->nfmsg->nfgen_family;
7523 const struct nft_object_type *type;
7524 struct net *net = info->net;
7525 struct nft_table *table;
7526 struct nft_object *obj;
7531 if (!nla[NFTA_OBJ_TYPE] ||
7532 !nla[NFTA_OBJ_NAME] ||
7533 !nla[NFTA_OBJ_DATA])
7536 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7537 NETLINK_CB(skb).portid);
7538 if (IS_ERR(table)) {
7539 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
7540 return PTR_ERR(table);
7543 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7544 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
7547 if (err != -ENOENT) {
7548 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
7552 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
7553 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
7556 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
7559 type = __nft_obj_type_get(objtype);
7560 if (WARN_ON_ONCE(!type))
7563 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7565 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
7568 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7570 if (!nft_use_inc(&table->use))
7573 type = nft_obj_type_get(net, objtype);
7575 err = PTR_ERR(type);
7579 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
7584 obj->key.table = table;
7585 obj->handle = nf_tables_alloc_handle(table);
7587 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL_ACCOUNT);
7588 if (!obj->key.name) {
7593 if (nla[NFTA_OBJ_USERDATA]) {
7594 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL_ACCOUNT);
7595 if (obj->udata == NULL)
7598 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
7601 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
7605 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
7606 nft_objname_ht_params);
7610 list_add_tail_rcu(&obj->list, &table->objects);
7614 /* queued in transaction log */
7615 INIT_LIST_HEAD(&obj->list);
7620 kfree(obj->key.name);
7622 if (obj->ops->destroy)
7623 obj->ops->destroy(&ctx, obj);
7626 module_put(type->owner);
7628 nft_use_dec_restore(&table->use);
7633 static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
7634 u32 portid, u32 seq, int event, u32 flags,
7635 int family, const struct nft_table *table,
7636 struct nft_object *obj, bool reset)
7638 struct nlmsghdr *nlh;
7640 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
7641 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7642 NFNETLINK_V0, nft_base_seq(net));
7644 goto nla_put_failure;
7646 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
7647 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
7648 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
7650 goto nla_put_failure;
7652 if (event == NFT_MSG_DELOBJ) {
7653 nlmsg_end(skb, nlh);
7657 if (nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
7658 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
7659 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset))
7660 goto nla_put_failure;
7663 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
7664 goto nla_put_failure;
7666 nlmsg_end(skb, nlh);
7670 nlmsg_trim(skb, nlh);
7674 static void audit_log_obj_reset(const struct nft_table *table,
7675 unsigned int base_seq, unsigned int nentries)
7677 char *buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, base_seq);
7679 audit_log_nfcfg(buf, table->family, nentries,
7680 AUDIT_NFT_OP_OBJ_RESET, GFP_ATOMIC);
7684 struct nft_obj_dump_ctx {
7689 static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
7691 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
7692 const struct nft_table *table;
7693 unsigned int idx = 0, s_idx = cb->args[0];
7694 struct nft_obj_dump_ctx *ctx = cb->data;
7695 struct net *net = sock_net(skb->sk);
7696 int family = nfmsg->nfgen_family;
7697 struct nftables_pernet *nft_net;
7698 unsigned int entries = 0;
7699 struct nft_object *obj;
7703 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7707 nft_net = nft_pernet(net);
7708 cb->seq = READ_ONCE(nft_net->base_seq);
7710 list_for_each_entry_rcu(table, &nft_net->tables, list) {
7711 if (family != NFPROTO_UNSPEC && family != table->family)
7715 list_for_each_entry_rcu(obj, &table->objects, list) {
7716 if (!nft_is_active(net, obj))
7720 if (ctx->table && strcmp(ctx->table, table->name))
7722 if (ctx->type != NFT_OBJECT_UNSPEC &&
7723 obj->ops->type->type != ctx->type)
7726 rc = nf_tables_fill_obj_info(skb, net,
7727 NETLINK_CB(cb->skb).portid,
7730 NLM_F_MULTI | NLM_F_APPEND,
7731 table->family, table,
7737 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7741 if (reset && entries)
7742 audit_log_obj_reset(table, nft_net->base_seq, entries);
7752 static int nf_tables_dump_obj_start(struct netlink_callback *cb)
7754 const struct nlattr * const *nla = cb->data;
7755 struct nft_obj_dump_ctx *ctx = NULL;
7757 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
7761 if (nla[NFTA_OBJ_TABLE]) {
7762 ctx->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
7769 if (nla[NFTA_OBJ_TYPE])
7770 ctx->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7776 static int nf_tables_dump_obj_done(struct netlink_callback *cb)
7778 struct nft_obj_dump_ctx *ctx = cb->data;
7786 /* called with rcu_read_lock held */
7787 static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
7788 const struct nlattr * const nla[])
7790 struct netlink_ext_ack *extack = info->extack;
7791 u8 genmask = nft_genmask_cur(info->net);
7792 u8 family = info->nfmsg->nfgen_family;
7793 const struct nft_table *table;
7794 struct net *net = info->net;
7795 struct nft_object *obj;
7796 struct sk_buff *skb2;
7801 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
7802 struct netlink_dump_control c = {
7803 .start = nf_tables_dump_obj_start,
7804 .dump = nf_tables_dump_obj,
7805 .done = nf_tables_dump_obj_done,
7806 .module = THIS_MODULE,
7807 .data = (void *)nla,
7810 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
7813 if (!nla[NFTA_OBJ_NAME] ||
7814 !nla[NFTA_OBJ_TYPE])
7817 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
7818 if (IS_ERR(table)) {
7819 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
7820 return PTR_ERR(table);
7823 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7824 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
7826 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
7827 return PTR_ERR(obj);
7830 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
7834 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
7838 const struct nftables_pernet *nft_net;
7841 nft_net = nft_pernet(net);
7842 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
7844 audit_log_nfcfg(buf,
7847 AUDIT_NFT_OP_OBJ_RESET,
7852 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
7853 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
7854 family, table, obj, reset);
7856 goto err_fill_obj_info;
7858 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7865 static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
7867 if (obj->ops->destroy)
7868 obj->ops->destroy(ctx, obj);
7870 module_put(obj->ops->type->owner);
7871 kfree(obj->key.name);
7876 static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
7877 const struct nlattr * const nla[])
7879 struct netlink_ext_ack *extack = info->extack;
7880 u8 genmask = nft_genmask_next(info->net);
7881 u8 family = info->nfmsg->nfgen_family;
7882 struct net *net = info->net;
7883 const struct nlattr *attr;
7884 struct nft_table *table;
7885 struct nft_object *obj;
7889 if (!nla[NFTA_OBJ_TYPE] ||
7890 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
7893 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
7894 NETLINK_CB(skb).portid);
7895 if (IS_ERR(table)) {
7896 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
7897 return PTR_ERR(table);
7900 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
7901 if (nla[NFTA_OBJ_HANDLE]) {
7902 attr = nla[NFTA_OBJ_HANDLE];
7903 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
7905 attr = nla[NFTA_OBJ_NAME];
7906 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
7910 if (PTR_ERR(obj) == -ENOENT &&
7911 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
7914 NL_SET_BAD_ATTR(extack, attr);
7915 return PTR_ERR(obj);
7918 NL_SET_BAD_ATTR(extack, attr);
7922 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7924 return nft_delobj(&ctx, obj);
7928 __nft_obj_notify(struct net *net, const struct nft_table *table,
7929 struct nft_object *obj, u32 portid, u32 seq, int event,
7930 u16 flags, int family, int report, gfp_t gfp)
7932 struct nftables_pernet *nft_net = nft_pernet(net);
7933 struct sk_buff *skb;
7937 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
7940 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
7944 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7945 flags & (NLM_F_CREATE | NLM_F_EXCL),
7946 family, table, obj, false);
7952 nft_notify_enqueue(skb, report, &nft_net->notify_list);
7955 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
7958 void nft_obj_notify(struct net *net, const struct nft_table *table,
7959 struct nft_object *obj, u32 portid, u32 seq, int event,
7960 u16 flags, int family, int report, gfp_t gfp)
7962 struct nftables_pernet *nft_net = nft_pernet(net);
7963 char *buf = kasprintf(gfp, "%s:%u",
7964 table->name, nft_net->base_seq);
7966 audit_log_nfcfg(buf,
7969 event == NFT_MSG_NEWOBJ ?
7970 AUDIT_NFT_OP_OBJ_REGISTER :
7971 AUDIT_NFT_OP_OBJ_UNREGISTER,
7975 __nft_obj_notify(net, table, obj, portid, seq, event,
7976 flags, family, report, gfp);
7978 EXPORT_SYMBOL_GPL(nft_obj_notify);
7980 static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7981 struct nft_object *obj, int event)
7983 __nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid,
7984 ctx->seq, event, ctx->flags, ctx->family,
7985 ctx->report, GFP_KERNEL);
7991 void nft_register_flowtable_type(struct nf_flowtable_type *type)
7993 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7994 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7995 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7997 EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7999 void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
8001 nfnl_lock(NFNL_SUBSYS_NFTABLES);
8002 list_del_rcu(&type->list);
8003 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
8005 EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
8007 static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
8008 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
8009 .len = NFT_NAME_MAXLEN - 1 },
8010 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
8011 .len = NFT_NAME_MAXLEN - 1 },
8012 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
8013 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
8014 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
8017 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
8018 const struct nlattr *nla, u8 genmask)
8020 struct nft_flowtable *flowtable;
8022 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8023 if (!nla_strcmp(nla, flowtable->name) &&
8024 nft_active_genmask(flowtable, genmask))
8027 return ERR_PTR(-ENOENT);
8029 EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
8031 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
8032 struct nft_flowtable *flowtable,
8033 enum nft_trans_phase phase)
8036 case NFT_TRANS_PREPARE_ERROR:
8037 case NFT_TRANS_PREPARE:
8038 case NFT_TRANS_ABORT:
8039 case NFT_TRANS_RELEASE:
8040 nft_use_dec(&flowtable->use);
8046 EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
8048 static struct nft_flowtable *
8049 nft_flowtable_lookup_byhandle(const struct nft_table *table,
8050 const struct nlattr *nla, u8 genmask)
8052 struct nft_flowtable *flowtable;
8054 list_for_each_entry(flowtable, &table->flowtables, list) {
8055 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
8056 nft_active_genmask(flowtable, genmask))
8059 return ERR_PTR(-ENOENT);
8062 struct nft_flowtable_hook {
8065 struct list_head list;
8068 static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
8069 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
8070 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
8071 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
8074 static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
8075 const struct nlattr * const nla[],
8076 struct nft_flowtable_hook *flowtable_hook,
8077 struct nft_flowtable *flowtable,
8078 struct netlink_ext_ack *extack, bool add)
8080 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
8081 struct nft_hook *hook;
8082 int hooknum, priority;
8085 INIT_LIST_HEAD(&flowtable_hook->list);
8087 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX,
8088 nla[NFTA_FLOWTABLE_HOOK],
8089 nft_flowtable_hook_policy, NULL);
8094 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
8095 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
8096 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8100 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
8101 if (hooknum != NF_NETDEV_INGRESS)
8104 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
8106 flowtable_hook->priority = priority;
8107 flowtable_hook->num = hooknum;
8109 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
8110 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
8111 if (hooknum != flowtable->hooknum)
8115 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
8116 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
8117 if (priority != flowtable->data.priority)
8121 flowtable_hook->priority = flowtable->data.priority;
8122 flowtable_hook->num = flowtable->hooknum;
8125 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
8126 err = nf_tables_parse_netdev_hooks(ctx->net,
8127 tb[NFTA_FLOWTABLE_HOOK_DEVS],
8128 &flowtable_hook->list,
8134 list_for_each_entry(hook, &flowtable_hook->list, list) {
8135 hook->ops.pf = NFPROTO_NETDEV;
8136 hook->ops.hooknum = flowtable_hook->num;
8137 hook->ops.priority = flowtable_hook->priority;
8138 hook->ops.priv = &flowtable->data;
8139 hook->ops.hook = flowtable->data.type->hook;
8145 static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
8147 const struct nf_flowtable_type *type;
8149 list_for_each_entry(type, &nf_tables_flowtables, list) {
8150 if (family == type->family)
8156 static const struct nf_flowtable_type *
8157 nft_flowtable_type_get(struct net *net, u8 family)
8159 const struct nf_flowtable_type *type;
8161 type = __nft_flowtable_type_get(family);
8162 if (type != NULL && try_module_get(type->owner))
8165 lockdep_nfnl_nft_mutex_not_held();
8166 #ifdef CONFIG_MODULES
8168 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
8169 return ERR_PTR(-EAGAIN);
8172 return ERR_PTR(-ENOENT);
8175 /* Only called from error and netdev event paths. */
8176 static void nft_unregister_flowtable_hook(struct net *net,
8177 struct nft_flowtable *flowtable,
8178 struct nft_hook *hook)
8180 nf_unregister_net_hook(net, &hook->ops);
8181 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8185 static void __nft_unregister_flowtable_net_hooks(struct net *net,
8186 struct list_head *hook_list,
8187 bool release_netdev)
8189 struct nft_hook *hook, *next;
8191 list_for_each_entry_safe(hook, next, hook_list, list) {
8192 nf_unregister_net_hook(net, &hook->ops);
8193 if (release_netdev) {
8194 list_del(&hook->list);
8195 kfree_rcu(hook, rcu);
8200 static void nft_unregister_flowtable_net_hooks(struct net *net,
8201 struct list_head *hook_list)
8203 __nft_unregister_flowtable_net_hooks(net, hook_list, false);
8206 static int nft_register_flowtable_net_hooks(struct net *net,
8207 struct nft_table *table,
8208 struct list_head *hook_list,
8209 struct nft_flowtable *flowtable)
8211 struct nft_hook *hook, *hook2, *next;
8212 struct nft_flowtable *ft;
8215 list_for_each_entry(hook, hook_list, list) {
8216 list_for_each_entry(ft, &table->flowtables, list) {
8217 if (!nft_is_active_next(net, ft))
8220 list_for_each_entry(hook2, &ft->hook_list, list) {
8221 if (hook->ops.dev == hook2->ops.dev &&
8222 hook->ops.pf == hook2->ops.pf) {
8224 goto err_unregister_net_hooks;
8229 err = flowtable->data.type->setup(&flowtable->data,
8233 goto err_unregister_net_hooks;
8235 err = nf_register_net_hook(net, &hook->ops);
8237 flowtable->data.type->setup(&flowtable->data,
8240 goto err_unregister_net_hooks;
8248 err_unregister_net_hooks:
8249 list_for_each_entry_safe(hook, next, hook_list, list) {
8253 nft_unregister_flowtable_hook(net, flowtable, hook);
8254 list_del_rcu(&hook->list);
8255 kfree_rcu(hook, rcu);
8261 static void nft_hooks_destroy(struct list_head *hook_list)
8263 struct nft_hook *hook, *next;
8265 list_for_each_entry_safe(hook, next, hook_list, list) {
8266 list_del_rcu(&hook->list);
8267 kfree_rcu(hook, rcu);
8271 static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
8272 struct nft_flowtable *flowtable,
8273 struct netlink_ext_ack *extack)
8275 const struct nlattr * const *nla = ctx->nla;
8276 struct nft_flowtable_hook flowtable_hook;
8277 struct nft_hook *hook, *next;
8278 struct nft_trans *trans;
8279 bool unregister = false;
8283 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8288 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8289 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
8290 list_del(&hook->list);
8295 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8296 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
8297 if (flags & ~NFT_FLOWTABLE_MASK) {
8299 goto err_flowtable_update_hook;
8301 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
8302 (flags & NFT_FLOWTABLE_HW_OFFLOAD)) {
8304 goto err_flowtable_update_hook;
8307 flags = flowtable->data.flags;
8310 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
8311 &flowtable_hook.list, flowtable);
8313 goto err_flowtable_update_hook;
8315 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
8316 sizeof(struct nft_trans_flowtable));
8320 goto err_flowtable_update_hook;
8323 nft_trans_flowtable_flags(trans) = flags;
8324 nft_trans_flowtable(trans) = flowtable;
8325 nft_trans_flowtable_update(trans) = true;
8326 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
8327 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
8329 nft_trans_commit_list_add_tail(ctx->net, trans);
8333 err_flowtable_update_hook:
8334 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
8336 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
8337 list_del_rcu(&hook->list);
8338 kfree_rcu(hook, rcu);
8345 static int nf_tables_newflowtable(struct sk_buff *skb,
8346 const struct nfnl_info *info,
8347 const struct nlattr * const nla[])
8349 struct netlink_ext_ack *extack = info->extack;
8350 struct nft_flowtable_hook flowtable_hook;
8351 u8 genmask = nft_genmask_next(info->net);
8352 u8 family = info->nfmsg->nfgen_family;
8353 const struct nf_flowtable_type *type;
8354 struct nft_flowtable *flowtable;
8355 struct nft_hook *hook, *next;
8356 struct net *net = info->net;
8357 struct nft_table *table;
8361 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8362 !nla[NFTA_FLOWTABLE_NAME] ||
8363 !nla[NFTA_FLOWTABLE_HOOK])
8366 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
8367 genmask, NETLINK_CB(skb).portid);
8368 if (IS_ERR(table)) {
8369 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
8370 return PTR_ERR(table);
8373 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8375 if (IS_ERR(flowtable)) {
8376 err = PTR_ERR(flowtable);
8377 if (err != -ENOENT) {
8378 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8382 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
8383 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8387 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
8389 return nft_flowtable_update(&ctx, info->nlh, flowtable, extack);
8392 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
8394 if (!nft_use_inc(&table->use))
8397 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL_ACCOUNT);
8400 goto flowtable_alloc;
8403 flowtable->table = table;
8404 flowtable->handle = nf_tables_alloc_handle(table);
8405 INIT_LIST_HEAD(&flowtable->hook_list);
8407 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL_ACCOUNT);
8408 if (!flowtable->name) {
8413 type = nft_flowtable_type_get(net, family);
8415 err = PTR_ERR(type);
8419 if (nla[NFTA_FLOWTABLE_FLAGS]) {
8420 flowtable->data.flags =
8421 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
8422 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
8428 write_pnet(&flowtable->data.net, net);
8429 flowtable->data.type = type;
8430 err = type->init(&flowtable->data);
8434 err = nft_flowtable_parse_hook(&ctx, nla, &flowtable_hook, flowtable,
8439 list_splice(&flowtable_hook.list, &flowtable->hook_list);
8440 flowtable->data.priority = flowtable_hook.priority;
8441 flowtable->hooknum = flowtable_hook.num;
8443 err = nft_register_flowtable_net_hooks(ctx.net, table,
8444 &flowtable->hook_list,
8447 nft_hooks_destroy(&flowtable->hook_list);
8451 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
8455 list_add_tail_rcu(&flowtable->list, &table->flowtables);
8459 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
8460 nft_unregister_flowtable_hook(net, flowtable, hook);
8461 list_del_rcu(&hook->list);
8462 kfree_rcu(hook, rcu);
8465 flowtable->data.type->free(&flowtable->data);
8467 module_put(type->owner);
8469 kfree(flowtable->name);
8473 nft_use_dec_restore(&table->use);
8478 static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
8480 struct nft_hook *this, *next;
8482 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
8483 list_del(&this->list);
8488 static int nft_delflowtable_hook(struct nft_ctx *ctx,
8489 struct nft_flowtable *flowtable,
8490 struct netlink_ext_ack *extack)
8492 const struct nlattr * const *nla = ctx->nla;
8493 struct nft_flowtable_hook flowtable_hook;
8494 LIST_HEAD(flowtable_del_list);
8495 struct nft_hook *this, *hook;
8496 struct nft_trans *trans;
8499 err = nft_flowtable_parse_hook(ctx, nla, &flowtable_hook, flowtable,
8504 list_for_each_entry(this, &flowtable_hook.list, list) {
8505 hook = nft_hook_list_find(&flowtable->hook_list, this);
8508 goto err_flowtable_del_hook;
8510 list_move(&hook->list, &flowtable_del_list);
8513 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
8514 sizeof(struct nft_trans_flowtable));
8517 goto err_flowtable_del_hook;
8520 nft_trans_flowtable(trans) = flowtable;
8521 nft_trans_flowtable_update(trans) = true;
8522 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
8523 list_splice(&flowtable_del_list, &nft_trans_flowtable_hooks(trans));
8524 nft_flowtable_hook_release(&flowtable_hook);
8526 nft_trans_commit_list_add_tail(ctx->net, trans);
8530 err_flowtable_del_hook:
8531 list_splice(&flowtable_del_list, &flowtable->hook_list);
8532 nft_flowtable_hook_release(&flowtable_hook);
8537 static int nf_tables_delflowtable(struct sk_buff *skb,
8538 const struct nfnl_info *info,
8539 const struct nlattr * const nla[])
8541 struct netlink_ext_ack *extack = info->extack;
8542 u8 genmask = nft_genmask_next(info->net);
8543 u8 family = info->nfmsg->nfgen_family;
8544 struct nft_flowtable *flowtable;
8545 struct net *net = info->net;
8546 const struct nlattr *attr;
8547 struct nft_table *table;
8550 if (!nla[NFTA_FLOWTABLE_TABLE] ||
8551 (!nla[NFTA_FLOWTABLE_NAME] &&
8552 !nla[NFTA_FLOWTABLE_HANDLE]))
8555 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
8556 genmask, NETLINK_CB(skb).portid);
8557 if (IS_ERR(table)) {
8558 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
8559 return PTR_ERR(table);
8562 if (nla[NFTA_FLOWTABLE_HANDLE]) {
8563 attr = nla[NFTA_FLOWTABLE_HANDLE];
8564 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
8566 attr = nla[NFTA_FLOWTABLE_NAME];
8567 flowtable = nft_flowtable_lookup(table, attr, genmask);
8570 if (IS_ERR(flowtable)) {
8571 if (PTR_ERR(flowtable) == -ENOENT &&
8572 NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
8575 NL_SET_BAD_ATTR(extack, attr);
8576 return PTR_ERR(flowtable);
8579 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
8581 if (nla[NFTA_FLOWTABLE_HOOK])
8582 return nft_delflowtable_hook(&ctx, flowtable, extack);
8584 if (flowtable->use > 0) {
8585 NL_SET_BAD_ATTR(extack, attr);
8589 return nft_delflowtable(&ctx, flowtable);
8592 static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
8593 u32 portid, u32 seq, int event,
8594 u32 flags, int family,
8595 struct nft_flowtable *flowtable,
8596 struct list_head *hook_list)
8598 struct nlattr *nest, *nest_devs;
8599 struct nft_hook *hook;
8600 struct nlmsghdr *nlh;
8602 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
8603 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
8604 NFNETLINK_V0, nft_base_seq(net));
8606 goto nla_put_failure;
8608 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
8609 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
8610 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
8611 NFTA_FLOWTABLE_PAD))
8612 goto nla_put_failure;
8614 if (event == NFT_MSG_DELFLOWTABLE && !hook_list) {
8615 nlmsg_end(skb, nlh);
8619 if (nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
8620 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
8621 goto nla_put_failure;
8623 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
8625 goto nla_put_failure;
8626 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
8627 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
8628 goto nla_put_failure;
8630 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
8632 goto nla_put_failure;
8635 hook_list = &flowtable->hook_list;
8637 list_for_each_entry_rcu(hook, hook_list, list) {
8638 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
8639 goto nla_put_failure;
8641 nla_nest_end(skb, nest_devs);
8642 nla_nest_end(skb, nest);
8644 nlmsg_end(skb, nlh);
8648 nlmsg_trim(skb, nlh);
8652 struct nft_flowtable_filter {
8656 static int nf_tables_dump_flowtable(struct sk_buff *skb,
8657 struct netlink_callback *cb)
8659 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
8660 struct nft_flowtable_filter *filter = cb->data;
8661 unsigned int idx = 0, s_idx = cb->args[0];
8662 struct net *net = sock_net(skb->sk);
8663 int family = nfmsg->nfgen_family;
8664 struct nft_flowtable *flowtable;
8665 struct nftables_pernet *nft_net;
8666 const struct nft_table *table;
8669 nft_net = nft_pernet(net);
8670 cb->seq = READ_ONCE(nft_net->base_seq);
8672 list_for_each_entry_rcu(table, &nft_net->tables, list) {
8673 if (family != NFPROTO_UNSPEC && family != table->family)
8676 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
8677 if (!nft_is_active(net, flowtable))
8682 memset(&cb->args[1], 0,
8683 sizeof(cb->args) - sizeof(cb->args[0]));
8684 if (filter && filter->table &&
8685 strcmp(filter->table, table->name))
8688 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
8690 NFT_MSG_NEWFLOWTABLE,
8691 NLM_F_MULTI | NLM_F_APPEND,
8693 flowtable, NULL) < 0)
8696 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
8708 static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
8710 const struct nlattr * const *nla = cb->data;
8711 struct nft_flowtable_filter *filter = NULL;
8713 if (nla[NFTA_FLOWTABLE_TABLE]) {
8714 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
8718 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
8720 if (!filter->table) {
8730 static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
8732 struct nft_flowtable_filter *filter = cb->data;
8737 kfree(filter->table);
8743 /* called with rcu_read_lock held */
8744 static int nf_tables_getflowtable(struct sk_buff *skb,
8745 const struct nfnl_info *info,
8746 const struct nlattr * const nla[])
8748 struct netlink_ext_ack *extack = info->extack;
8749 u8 genmask = nft_genmask_cur(info->net);
8750 u8 family = info->nfmsg->nfgen_family;
8751 struct nft_flowtable *flowtable;
8752 const struct nft_table *table;
8753 struct net *net = info->net;
8754 struct sk_buff *skb2;
8757 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
8758 struct netlink_dump_control c = {
8759 .start = nf_tables_dump_flowtable_start,
8760 .dump = nf_tables_dump_flowtable,
8761 .done = nf_tables_dump_flowtable_done,
8762 .module = THIS_MODULE,
8763 .data = (void *)nla,
8766 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
8769 if (!nla[NFTA_FLOWTABLE_NAME])
8772 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
8774 if (IS_ERR(table)) {
8775 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
8776 return PTR_ERR(table);
8779 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
8781 if (IS_ERR(flowtable)) {
8782 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
8783 return PTR_ERR(flowtable);
8786 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
8790 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
8791 info->nlh->nlmsg_seq,
8792 NFT_MSG_NEWFLOWTABLE, 0, family,
8795 goto err_fill_flowtable_info;
8797 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
8799 err_fill_flowtable_info:
8804 static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
8805 struct nft_flowtable *flowtable,
8806 struct list_head *hook_list, int event)
8808 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
8809 struct sk_buff *skb;
8814 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
8817 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8821 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
8822 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
8824 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
8825 ctx->seq, event, flags,
8826 ctx->family, flowtable, hook_list);
8832 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
8835 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
8838 static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
8840 struct nft_hook *hook, *next;
8842 flowtable->data.type->free(&flowtable->data);
8843 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
8844 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
8846 list_del_rcu(&hook->list);
8849 kfree(flowtable->name);
8850 module_put(flowtable->data.type->owner);
8854 static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
8855 u32 portid, u32 seq)
8857 struct nftables_pernet *nft_net = nft_pernet(net);
8858 struct nlmsghdr *nlh;
8859 char buf[TASK_COMM_LEN];
8860 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
8862 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
8863 NFNETLINK_V0, nft_base_seq(net));
8865 goto nla_put_failure;
8867 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
8868 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
8869 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
8870 goto nla_put_failure;
8872 nlmsg_end(skb, nlh);
8876 nlmsg_trim(skb, nlh);
8880 static void nft_flowtable_event(unsigned long event, struct net_device *dev,
8881 struct nft_flowtable *flowtable)
8883 struct nft_hook *hook;
8885 list_for_each_entry(hook, &flowtable->hook_list, list) {
8886 if (hook->ops.dev != dev)
8889 /* flow_offload_netdev_event() cleans up entries for us. */
8890 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
8891 list_del_rcu(&hook->list);
8892 kfree_rcu(hook, rcu);
8897 static int nf_tables_flowtable_event(struct notifier_block *this,
8898 unsigned long event, void *ptr)
8900 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8901 struct nft_flowtable *flowtable;
8902 struct nftables_pernet *nft_net;
8903 struct nft_table *table;
8906 if (event != NETDEV_UNREGISTER)
8910 nft_net = nft_pernet(net);
8911 mutex_lock(&nft_net->commit_mutex);
8912 list_for_each_entry(table, &nft_net->tables, list) {
8913 list_for_each_entry(flowtable, &table->flowtables, list) {
8914 nft_flowtable_event(event, dev, flowtable);
8917 mutex_unlock(&nft_net->commit_mutex);
8922 static struct notifier_block nf_tables_flowtable_notifier = {
8923 .notifier_call = nf_tables_flowtable_event,
8926 static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
8929 struct nlmsghdr *nlh = nlmsg_hdr(skb);
8930 struct sk_buff *skb2;
8933 if (!nlmsg_report(nlh) &&
8934 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
8937 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
8941 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
8948 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8949 nlmsg_report(nlh), GFP_KERNEL);
8952 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
8956 static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
8957 const struct nlattr * const nla[])
8959 struct sk_buff *skb2;
8962 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
8966 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
8967 info->nlh->nlmsg_seq);
8969 goto err_fill_gen_info;
8971 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
8978 static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
8979 [NFT_MSG_NEWTABLE] = {
8980 .call = nf_tables_newtable,
8981 .type = NFNL_CB_BATCH,
8982 .attr_count = NFTA_TABLE_MAX,
8983 .policy = nft_table_policy,
8985 [NFT_MSG_GETTABLE] = {
8986 .call = nf_tables_gettable,
8987 .type = NFNL_CB_RCU,
8988 .attr_count = NFTA_TABLE_MAX,
8989 .policy = nft_table_policy,
8991 [NFT_MSG_DELTABLE] = {
8992 .call = nf_tables_deltable,
8993 .type = NFNL_CB_BATCH,
8994 .attr_count = NFTA_TABLE_MAX,
8995 .policy = nft_table_policy,
8997 [NFT_MSG_DESTROYTABLE] = {
8998 .call = nf_tables_deltable,
8999 .type = NFNL_CB_BATCH,
9000 .attr_count = NFTA_TABLE_MAX,
9001 .policy = nft_table_policy,
9003 [NFT_MSG_NEWCHAIN] = {
9004 .call = nf_tables_newchain,
9005 .type = NFNL_CB_BATCH,
9006 .attr_count = NFTA_CHAIN_MAX,
9007 .policy = nft_chain_policy,
9009 [NFT_MSG_GETCHAIN] = {
9010 .call = nf_tables_getchain,
9011 .type = NFNL_CB_RCU,
9012 .attr_count = NFTA_CHAIN_MAX,
9013 .policy = nft_chain_policy,
9015 [NFT_MSG_DELCHAIN] = {
9016 .call = nf_tables_delchain,
9017 .type = NFNL_CB_BATCH,
9018 .attr_count = NFTA_CHAIN_MAX,
9019 .policy = nft_chain_policy,
9021 [NFT_MSG_DESTROYCHAIN] = {
9022 .call = nf_tables_delchain,
9023 .type = NFNL_CB_BATCH,
9024 .attr_count = NFTA_CHAIN_MAX,
9025 .policy = nft_chain_policy,
9027 [NFT_MSG_NEWRULE] = {
9028 .call = nf_tables_newrule,
9029 .type = NFNL_CB_BATCH,
9030 .attr_count = NFTA_RULE_MAX,
9031 .policy = nft_rule_policy,
9033 [NFT_MSG_GETRULE] = {
9034 .call = nf_tables_getrule,
9035 .type = NFNL_CB_RCU,
9036 .attr_count = NFTA_RULE_MAX,
9037 .policy = nft_rule_policy,
9039 [NFT_MSG_GETRULE_RESET] = {
9040 .call = nf_tables_getrule_reset,
9041 .type = NFNL_CB_RCU,
9042 .attr_count = NFTA_RULE_MAX,
9043 .policy = nft_rule_policy,
9045 [NFT_MSG_DELRULE] = {
9046 .call = nf_tables_delrule,
9047 .type = NFNL_CB_BATCH,
9048 .attr_count = NFTA_RULE_MAX,
9049 .policy = nft_rule_policy,
9051 [NFT_MSG_DESTROYRULE] = {
9052 .call = nf_tables_delrule,
9053 .type = NFNL_CB_BATCH,
9054 .attr_count = NFTA_RULE_MAX,
9055 .policy = nft_rule_policy,
9057 [NFT_MSG_NEWSET] = {
9058 .call = nf_tables_newset,
9059 .type = NFNL_CB_BATCH,
9060 .attr_count = NFTA_SET_MAX,
9061 .policy = nft_set_policy,
9063 [NFT_MSG_GETSET] = {
9064 .call = nf_tables_getset,
9065 .type = NFNL_CB_RCU,
9066 .attr_count = NFTA_SET_MAX,
9067 .policy = nft_set_policy,
9069 [NFT_MSG_DELSET] = {
9070 .call = nf_tables_delset,
9071 .type = NFNL_CB_BATCH,
9072 .attr_count = NFTA_SET_MAX,
9073 .policy = nft_set_policy,
9075 [NFT_MSG_DESTROYSET] = {
9076 .call = nf_tables_delset,
9077 .type = NFNL_CB_BATCH,
9078 .attr_count = NFTA_SET_MAX,
9079 .policy = nft_set_policy,
9081 [NFT_MSG_NEWSETELEM] = {
9082 .call = nf_tables_newsetelem,
9083 .type = NFNL_CB_BATCH,
9084 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9085 .policy = nft_set_elem_list_policy,
9087 [NFT_MSG_GETSETELEM] = {
9088 .call = nf_tables_getsetelem,
9089 .type = NFNL_CB_RCU,
9090 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9091 .policy = nft_set_elem_list_policy,
9093 [NFT_MSG_GETSETELEM_RESET] = {
9094 .call = nf_tables_getsetelem,
9095 .type = NFNL_CB_RCU,
9096 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9097 .policy = nft_set_elem_list_policy,
9099 [NFT_MSG_DELSETELEM] = {
9100 .call = nf_tables_delsetelem,
9101 .type = NFNL_CB_BATCH,
9102 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9103 .policy = nft_set_elem_list_policy,
9105 [NFT_MSG_DESTROYSETELEM] = {
9106 .call = nf_tables_delsetelem,
9107 .type = NFNL_CB_BATCH,
9108 .attr_count = NFTA_SET_ELEM_LIST_MAX,
9109 .policy = nft_set_elem_list_policy,
9111 [NFT_MSG_GETGEN] = {
9112 .call = nf_tables_getgen,
9113 .type = NFNL_CB_RCU,
9115 [NFT_MSG_NEWOBJ] = {
9116 .call = nf_tables_newobj,
9117 .type = NFNL_CB_BATCH,
9118 .attr_count = NFTA_OBJ_MAX,
9119 .policy = nft_obj_policy,
9121 [NFT_MSG_GETOBJ] = {
9122 .call = nf_tables_getobj,
9123 .type = NFNL_CB_RCU,
9124 .attr_count = NFTA_OBJ_MAX,
9125 .policy = nft_obj_policy,
9127 [NFT_MSG_DELOBJ] = {
9128 .call = nf_tables_delobj,
9129 .type = NFNL_CB_BATCH,
9130 .attr_count = NFTA_OBJ_MAX,
9131 .policy = nft_obj_policy,
9133 [NFT_MSG_DESTROYOBJ] = {
9134 .call = nf_tables_delobj,
9135 .type = NFNL_CB_BATCH,
9136 .attr_count = NFTA_OBJ_MAX,
9137 .policy = nft_obj_policy,
9139 [NFT_MSG_GETOBJ_RESET] = {
9140 .call = nf_tables_getobj,
9141 .type = NFNL_CB_RCU,
9142 .attr_count = NFTA_OBJ_MAX,
9143 .policy = nft_obj_policy,
9145 [NFT_MSG_NEWFLOWTABLE] = {
9146 .call = nf_tables_newflowtable,
9147 .type = NFNL_CB_BATCH,
9148 .attr_count = NFTA_FLOWTABLE_MAX,
9149 .policy = nft_flowtable_policy,
9151 [NFT_MSG_GETFLOWTABLE] = {
9152 .call = nf_tables_getflowtable,
9153 .type = NFNL_CB_RCU,
9154 .attr_count = NFTA_FLOWTABLE_MAX,
9155 .policy = nft_flowtable_policy,
9157 [NFT_MSG_DELFLOWTABLE] = {
9158 .call = nf_tables_delflowtable,
9159 .type = NFNL_CB_BATCH,
9160 .attr_count = NFTA_FLOWTABLE_MAX,
9161 .policy = nft_flowtable_policy,
9163 [NFT_MSG_DESTROYFLOWTABLE] = {
9164 .call = nf_tables_delflowtable,
9165 .type = NFNL_CB_BATCH,
9166 .attr_count = NFTA_FLOWTABLE_MAX,
9167 .policy = nft_flowtable_policy,
9171 static int nf_tables_validate(struct net *net)
9173 struct nftables_pernet *nft_net = nft_pernet(net);
9174 struct nft_table *table;
9176 list_for_each_entry(table, &nft_net->tables, list) {
9177 switch (table->validate_state) {
9178 case NFT_VALIDATE_SKIP:
9180 case NFT_VALIDATE_NEED:
9181 nft_validate_state_update(table, NFT_VALIDATE_DO);
9183 case NFT_VALIDATE_DO:
9184 if (nft_table_validate(net, table) < 0)
9187 nft_validate_state_update(table, NFT_VALIDATE_SKIP);
9195 /* a drop policy has to be deferred until all rules have been activated,
9196 * otherwise a large ruleset that contains a drop-policy base chain will
9197 * cause all packets to get dropped until the full transaction has been
9200 * We defer the drop policy until the transaction has been finalized.
9202 static void nft_chain_commit_drop_policy(struct nft_trans *trans)
9204 struct nft_base_chain *basechain;
9206 if (nft_trans_chain_policy(trans) != NF_DROP)
9209 if (!nft_is_base_chain(trans->ctx.chain))
9212 basechain = nft_base_chain(trans->ctx.chain);
9213 basechain->policy = NF_DROP;
9216 static void nft_chain_commit_update(struct nft_trans *trans)
9218 struct nft_base_chain *basechain;
9220 if (nft_trans_chain_name(trans)) {
9221 rhltable_remove(&trans->ctx.table->chains_ht,
9222 &trans->ctx.chain->rhlhead,
9223 nft_chain_ht_params);
9224 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
9225 rhltable_insert_key(&trans->ctx.table->chains_ht,
9226 trans->ctx.chain->name,
9227 &trans->ctx.chain->rhlhead,
9228 nft_chain_ht_params);
9231 if (!nft_is_base_chain(trans->ctx.chain))
9234 nft_chain_stats_replace(trans);
9236 basechain = nft_base_chain(trans->ctx.chain);
9238 switch (nft_trans_chain_policy(trans)) {
9241 basechain->policy = nft_trans_chain_policy(trans);
9246 static void nft_obj_commit_update(struct nft_trans *trans)
9248 struct nft_object *newobj;
9249 struct nft_object *obj;
9251 obj = nft_trans_obj(trans);
9252 newobj = nft_trans_obj_newobj(trans);
9254 if (obj->ops->update)
9255 obj->ops->update(obj, newobj);
9257 nft_obj_destroy(&trans->ctx, newobj);
9260 static void nft_commit_release(struct nft_trans *trans)
9262 switch (trans->msg_type) {
9263 case NFT_MSG_DELTABLE:
9264 case NFT_MSG_DESTROYTABLE:
9265 nf_tables_table_destroy(&trans->ctx);
9267 case NFT_MSG_NEWCHAIN:
9268 free_percpu(nft_trans_chain_stats(trans));
9269 kfree(nft_trans_chain_name(trans));
9271 case NFT_MSG_DELCHAIN:
9272 case NFT_MSG_DESTROYCHAIN:
9273 if (nft_trans_chain_update(trans))
9274 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
9276 nf_tables_chain_destroy(&trans->ctx);
9278 case NFT_MSG_DELRULE:
9279 case NFT_MSG_DESTROYRULE:
9280 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
9282 case NFT_MSG_DELSET:
9283 case NFT_MSG_DESTROYSET:
9284 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
9286 case NFT_MSG_DELSETELEM:
9287 case NFT_MSG_DESTROYSETELEM:
9288 nf_tables_set_elem_destroy(&trans->ctx,
9289 nft_trans_elem_set(trans),
9290 nft_trans_elem(trans).priv);
9292 case NFT_MSG_DELOBJ:
9293 case NFT_MSG_DESTROYOBJ:
9294 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
9296 case NFT_MSG_DELFLOWTABLE:
9297 case NFT_MSG_DESTROYFLOWTABLE:
9298 if (nft_trans_flowtable_update(trans))
9299 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
9301 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
9306 put_net(trans->ctx.net);
9311 static void nf_tables_trans_destroy_work(struct work_struct *w)
9313 struct nft_trans *trans, *next;
9316 spin_lock(&nf_tables_destroy_list_lock);
9317 list_splice_init(&nf_tables_destroy_list, &head);
9318 spin_unlock(&nf_tables_destroy_list_lock);
9320 if (list_empty(&head))
9325 list_for_each_entry_safe(trans, next, &head, list) {
9326 nft_trans_list_del(trans);
9327 nft_commit_release(trans);
9331 void nf_tables_trans_destroy_flush_work(void)
9333 flush_work(&trans_destroy_work);
9335 EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
9337 static bool nft_expr_reduce(struct nft_regs_track *track,
9338 const struct nft_expr *expr)
9343 static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
9345 const struct nft_expr *expr, *last;
9346 struct nft_regs_track track = {};
9347 unsigned int size, data_size;
9348 void *data, *data_boundary;
9349 struct nft_rule_dp *prule;
9350 struct nft_rule *rule;
9352 /* already handled or inactive chain? */
9353 if (chain->blob_next || !nft_is_active_next(net, chain))
9357 list_for_each_entry(rule, &chain->rules, list) {
9358 if (nft_is_active_next(net, rule)) {
9359 data_size += sizeof(*prule) + rule->dlen;
9360 if (data_size > INT_MAX)
9365 chain->blob_next = nf_tables_chain_alloc_rules(chain, data_size);
9366 if (!chain->blob_next)
9369 data = (void *)chain->blob_next->data;
9370 data_boundary = data + data_size;
9373 list_for_each_entry(rule, &chain->rules, list) {
9374 if (!nft_is_active_next(net, rule))
9377 prule = (struct nft_rule_dp *)data;
9378 data += offsetof(struct nft_rule_dp, data);
9379 if (WARN_ON_ONCE(data > data_boundary))
9383 track.last = nft_expr_last(rule);
9384 nft_rule_for_each_expr(expr, last, rule) {
9387 if (nft_expr_reduce(&track, expr)) {
9392 if (WARN_ON_ONCE(data + size + expr->ops->size > data_boundary))
9395 memcpy(data + size, expr, expr->ops->size);
9396 size += expr->ops->size;
9398 if (WARN_ON_ONCE(size >= 1 << 12))
9401 prule->handle = rule->handle;
9407 chain->blob_next->size += (unsigned long)(data - (void *)prule);
9410 if (WARN_ON_ONCE(data > data_boundary))
9413 prule = (struct nft_rule_dp *)data;
9414 nft_last_rule(chain, prule);
9419 static void nf_tables_commit_chain_prepare_cancel(struct net *net)
9421 struct nftables_pernet *nft_net = nft_pernet(net);
9422 struct nft_trans *trans, *next;
9424 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
9425 struct nft_chain *chain = trans->ctx.chain;
9427 if (trans->msg_type == NFT_MSG_NEWRULE ||
9428 trans->msg_type == NFT_MSG_DELRULE) {
9429 kvfree(chain->blob_next);
9430 chain->blob_next = NULL;
9435 static void __nf_tables_commit_chain_free_rules(struct rcu_head *h)
9437 struct nft_rule_dp_last *l = container_of(h, struct nft_rule_dp_last, h);
9442 static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
9444 struct nft_rule_dp_last *last;
9446 /* last rule trailer is after end marker */
9447 last = (void *)blob + sizeof(*blob) + blob->size;
9450 call_rcu(&last->h, __nf_tables_commit_chain_free_rules);
9453 static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
9455 struct nft_rule_blob *g0, *g1;
9458 next_genbit = nft_gencursor_next(net);
9460 g0 = rcu_dereference_protected(chain->blob_gen_0,
9461 lockdep_commit_lock_is_held(net));
9462 g1 = rcu_dereference_protected(chain->blob_gen_1,
9463 lockdep_commit_lock_is_held(net));
9465 /* No changes to this chain? */
9466 if (chain->blob_next == NULL) {
9467 /* chain had no change in last or next generation */
9471 * chain had no change in this generation; make sure next
9472 * one uses same rules as current generation.
9475 rcu_assign_pointer(chain->blob_gen_1, g0);
9476 nf_tables_commit_chain_free_rules_old(g1);
9478 rcu_assign_pointer(chain->blob_gen_0, g1);
9479 nf_tables_commit_chain_free_rules_old(g0);
9486 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
9488 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
9490 chain->blob_next = NULL;
9496 nf_tables_commit_chain_free_rules_old(g1);
9498 nf_tables_commit_chain_free_rules_old(g0);
9501 static void nft_obj_del(struct nft_object *obj)
9503 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
9504 list_del_rcu(&obj->list);
9507 void nft_chain_del(struct nft_chain *chain)
9509 struct nft_table *table = chain->table;
9511 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
9512 nft_chain_ht_params));
9513 list_del_rcu(&chain->list);
9516 static void nft_trans_gc_setelem_remove(struct nft_ctx *ctx,
9517 struct nft_trans_gc *trans)
9519 void **priv = trans->priv;
9522 for (i = 0; i < trans->count; i++) {
9523 struct nft_set_elem elem = {
9527 nft_setelem_data_deactivate(ctx->net, trans->set, &elem);
9528 nft_setelem_remove(ctx->net, trans->set, &elem);
9532 void nft_trans_gc_destroy(struct nft_trans_gc *trans)
9534 nft_set_put(trans->set);
9535 put_net(trans->net);
9539 static void nft_trans_gc_trans_free(struct rcu_head *rcu)
9541 struct nft_set_elem elem = {};
9542 struct nft_trans_gc *trans;
9543 struct nft_ctx ctx = {};
9546 trans = container_of(rcu, struct nft_trans_gc, rcu);
9547 ctx.net = read_pnet(&trans->set->net);
9549 for (i = 0; i < trans->count; i++) {
9550 elem.priv = trans->priv[i];
9551 if (!nft_setelem_is_catchall(trans->set, &elem))
9552 atomic_dec(&trans->set->nelems);
9554 nf_tables_set_elem_destroy(&ctx, trans->set, elem.priv);
9557 nft_trans_gc_destroy(trans);
9560 static bool nft_trans_gc_work_done(struct nft_trans_gc *trans)
9562 struct nftables_pernet *nft_net;
9563 struct nft_ctx ctx = {};
9565 nft_net = nft_pernet(trans->net);
9567 mutex_lock(&nft_net->commit_mutex);
9569 /* Check for race with transaction, otherwise this batch refers to
9570 * stale objects that might not be there anymore. Skip transaction if
9571 * set has been destroyed from control plane transaction in case gc
9572 * worker loses race.
9574 if (READ_ONCE(nft_net->gc_seq) != trans->seq || trans->set->dead) {
9575 mutex_unlock(&nft_net->commit_mutex);
9579 ctx.net = trans->net;
9580 ctx.table = trans->set->table;
9582 nft_trans_gc_setelem_remove(&ctx, trans);
9583 mutex_unlock(&nft_net->commit_mutex);
9588 static void nft_trans_gc_work(struct work_struct *work)
9590 struct nft_trans_gc *trans, *next;
9591 LIST_HEAD(trans_gc_list);
9593 spin_lock(&nf_tables_gc_list_lock);
9594 list_splice_init(&nf_tables_gc_list, &trans_gc_list);
9595 spin_unlock(&nf_tables_gc_list_lock);
9597 list_for_each_entry_safe(trans, next, &trans_gc_list, list) {
9598 list_del(&trans->list);
9599 if (!nft_trans_gc_work_done(trans)) {
9600 nft_trans_gc_destroy(trans);
9603 call_rcu(&trans->rcu, nft_trans_gc_trans_free);
9607 struct nft_trans_gc *nft_trans_gc_alloc(struct nft_set *set,
9608 unsigned int gc_seq, gfp_t gfp)
9610 struct net *net = read_pnet(&set->net);
9611 struct nft_trans_gc *trans;
9613 trans = kzalloc(sizeof(*trans), gfp);
9617 trans->net = maybe_get_net(net);
9623 refcount_inc(&set->refs);
9625 trans->seq = gc_seq;
9630 void nft_trans_gc_elem_add(struct nft_trans_gc *trans, void *priv)
9632 trans->priv[trans->count++] = priv;
9635 static void nft_trans_gc_queue_work(struct nft_trans_gc *trans)
9637 spin_lock(&nf_tables_gc_list_lock);
9638 list_add_tail(&trans->list, &nf_tables_gc_list);
9639 spin_unlock(&nf_tables_gc_list_lock);
9641 schedule_work(&trans_gc_work);
9644 static int nft_trans_gc_space(struct nft_trans_gc *trans)
9646 return NFT_TRANS_GC_BATCHCOUNT - trans->count;
9649 struct nft_trans_gc *nft_trans_gc_queue_async(struct nft_trans_gc *gc,
9650 unsigned int gc_seq, gfp_t gfp)
9652 struct nft_set *set;
9654 if (nft_trans_gc_space(gc))
9658 nft_trans_gc_queue_work(gc);
9660 return nft_trans_gc_alloc(set, gc_seq, gfp);
9663 void nft_trans_gc_queue_async_done(struct nft_trans_gc *trans)
9665 if (trans->count == 0) {
9666 nft_trans_gc_destroy(trans);
9670 nft_trans_gc_queue_work(trans);
9673 struct nft_trans_gc *nft_trans_gc_queue_sync(struct nft_trans_gc *gc, gfp_t gfp)
9675 struct nft_set *set;
9677 if (WARN_ON_ONCE(!lockdep_commit_lock_is_held(gc->net)))
9680 if (nft_trans_gc_space(gc))
9684 call_rcu(&gc->rcu, nft_trans_gc_trans_free);
9686 return nft_trans_gc_alloc(set, 0, gfp);
9689 void nft_trans_gc_queue_sync_done(struct nft_trans_gc *trans)
9691 WARN_ON_ONCE(!lockdep_commit_lock_is_held(trans->net));
9693 if (trans->count == 0) {
9694 nft_trans_gc_destroy(trans);
9698 call_rcu(&trans->rcu, nft_trans_gc_trans_free);
9701 static struct nft_trans_gc *nft_trans_gc_catchall(struct nft_trans_gc *gc,
9702 unsigned int gc_seq,
9705 struct nft_set_elem_catchall *catchall;
9706 const struct nft_set *set = gc->set;
9707 struct nft_set_ext *ext;
9709 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9710 ext = nft_set_elem_ext(set, catchall->elem);
9712 if (!nft_set_elem_expired(ext))
9714 if (nft_set_elem_is_dead(ext))
9717 nft_set_elem_dead(ext);
9720 gc = nft_trans_gc_queue_sync(gc, GFP_ATOMIC);
9722 gc = nft_trans_gc_queue_async(gc, gc_seq, GFP_ATOMIC);
9727 nft_trans_gc_elem_add(gc, catchall->elem);
9733 struct nft_trans_gc *nft_trans_gc_catchall_async(struct nft_trans_gc *gc,
9734 unsigned int gc_seq)
9736 return nft_trans_gc_catchall(gc, gc_seq, false);
9739 struct nft_trans_gc *nft_trans_gc_catchall_sync(struct nft_trans_gc *gc)
9741 return nft_trans_gc_catchall(gc, 0, true);
9744 static void nf_tables_module_autoload_cleanup(struct net *net)
9746 struct nftables_pernet *nft_net = nft_pernet(net);
9747 struct nft_module_request *req, *next;
9749 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
9750 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
9751 WARN_ON_ONCE(!req->done);
9752 list_del(&req->list);
9757 static void nf_tables_commit_release(struct net *net)
9759 struct nftables_pernet *nft_net = nft_pernet(net);
9760 struct nft_trans *trans;
9762 /* all side effects have to be made visible.
9763 * For example, if a chain named 'foo' has been deleted, a
9764 * new transaction must not find it anymore.
9766 * Memory reclaim happens asynchronously from work queue
9767 * to prevent expensive synchronize_rcu() in commit phase.
9769 if (list_empty(&nft_net->commit_list)) {
9770 nf_tables_module_autoload_cleanup(net);
9771 mutex_unlock(&nft_net->commit_mutex);
9775 trans = list_last_entry(&nft_net->commit_list,
9776 struct nft_trans, list);
9777 get_net(trans->ctx.net);
9778 WARN_ON_ONCE(trans->put_net);
9780 trans->put_net = true;
9781 spin_lock(&nf_tables_destroy_list_lock);
9782 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
9783 spin_unlock(&nf_tables_destroy_list_lock);
9785 nf_tables_module_autoload_cleanup(net);
9786 schedule_work(&trans_destroy_work);
9788 mutex_unlock(&nft_net->commit_mutex);
9791 static void nft_commit_notify(struct net *net, u32 portid)
9793 struct nftables_pernet *nft_net = nft_pernet(net);
9794 struct sk_buff *batch_skb = NULL, *nskb, *skb;
9795 unsigned char *data;
9798 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
9802 len = NLMSG_GOODSIZE - skb->len;
9803 list_del(&skb->list);
9807 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
9808 data = skb_put(batch_skb, skb->len);
9809 memcpy(data, skb->data, skb->len);
9810 list_del(&skb->list);
9814 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9815 NFT_CB(batch_skb).report, GFP_KERNEL);
9820 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
9821 NFT_CB(batch_skb).report, GFP_KERNEL);
9824 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
9827 static int nf_tables_commit_audit_alloc(struct list_head *adl,
9828 struct nft_table *table)
9830 struct nft_audit_data *adp;
9832 list_for_each_entry(adp, adl, list) {
9833 if (adp->table == table)
9836 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
9840 list_add(&adp->list, adl);
9844 static void nf_tables_commit_audit_free(struct list_head *adl)
9846 struct nft_audit_data *adp, *adn;
9848 list_for_each_entry_safe(adp, adn, adl, list) {
9849 list_del(&adp->list);
9854 static void nf_tables_commit_audit_collect(struct list_head *adl,
9855 struct nft_table *table, u32 op)
9857 struct nft_audit_data *adp;
9859 list_for_each_entry(adp, adl, list) {
9860 if (adp->table == table)
9863 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
9867 if (!adp->op || adp->op > op)
9871 #define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
9873 static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
9875 struct nft_audit_data *adp, *adn;
9876 char aubuf[AUNFTABLENAMELEN];
9878 list_for_each_entry_safe(adp, adn, adl, list) {
9879 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
9881 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
9882 nft2audit_op[adp->op], GFP_KERNEL);
9883 list_del(&adp->list);
9888 static void nft_set_commit_update(struct list_head *set_update_list)
9890 struct nft_set *set, *next;
9892 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
9893 list_del_init(&set->pending_update);
9895 if (!set->ops->commit)
9898 set->ops->commit(set);
9902 static unsigned int nft_gc_seq_begin(struct nftables_pernet *nft_net)
9904 unsigned int gc_seq;
9906 /* Bump gc counter, it becomes odd, this is the busy mark. */
9907 gc_seq = READ_ONCE(nft_net->gc_seq);
9908 WRITE_ONCE(nft_net->gc_seq, ++gc_seq);
9913 static void nft_gc_seq_end(struct nftables_pernet *nft_net, unsigned int gc_seq)
9915 WRITE_ONCE(nft_net->gc_seq, ++gc_seq);
9918 static int nf_tables_commit(struct net *net, struct sk_buff *skb)
9920 struct nftables_pernet *nft_net = nft_pernet(net);
9921 struct nft_trans *trans, *next;
9922 unsigned int base_seq, gc_seq;
9923 LIST_HEAD(set_update_list);
9924 struct nft_trans_elem *te;
9925 struct nft_chain *chain;
9926 struct nft_table *table;
9930 if (list_empty(&nft_net->commit_list)) {
9931 mutex_unlock(&nft_net->commit_mutex);
9935 list_for_each_entry(trans, &nft_net->binding_list, binding_list) {
9936 switch (trans->msg_type) {
9937 case NFT_MSG_NEWSET:
9938 if (!nft_trans_set_update(trans) &&
9939 nft_set_is_anonymous(nft_trans_set(trans)) &&
9940 !nft_trans_set_bound(trans)) {
9941 pr_warn_once("nftables ruleset with unbound set\n");
9945 case NFT_MSG_NEWCHAIN:
9946 if (!nft_trans_chain_update(trans) &&
9947 nft_chain_binding(nft_trans_chain(trans)) &&
9948 !nft_trans_chain_bound(trans)) {
9949 pr_warn_once("nftables ruleset with unbound chain\n");
9956 /* 0. Validate ruleset, otherwise roll back for error reporting. */
9957 if (nf_tables_validate(net) < 0) {
9958 nft_net->validate_state = NFT_VALIDATE_DO;
9962 err = nft_flow_rule_offload_commit(net);
9966 /* 1. Allocate space for next generation rules_gen_X[] */
9967 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
9970 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
9972 nf_tables_commit_chain_prepare_cancel(net);
9973 nf_tables_commit_audit_free(&adl);
9976 if (trans->msg_type == NFT_MSG_NEWRULE ||
9977 trans->msg_type == NFT_MSG_DELRULE) {
9978 chain = trans->ctx.chain;
9980 ret = nf_tables_commit_chain_prepare(net, chain);
9982 nf_tables_commit_chain_prepare_cancel(net);
9983 nf_tables_commit_audit_free(&adl);
9989 /* step 2. Make rules_gen_X visible to packet path */
9990 list_for_each_entry(table, &nft_net->tables, list) {
9991 list_for_each_entry(chain, &table->chains, list)
9992 nf_tables_commit_chain(net, chain);
9996 * Bump generation counter, invalidate any dump in progress.
9997 * Cannot fail after this point.
9999 base_seq = READ_ONCE(nft_net->base_seq);
10000 while (++base_seq == 0)
10003 WRITE_ONCE(nft_net->base_seq, base_seq);
10005 gc_seq = nft_gc_seq_begin(nft_net);
10007 /* step 3. Start new generation, rules_gen_X now in use. */
10008 net->nft.gencursor = nft_gencursor_next(net);
10010 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
10011 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
10013 switch (trans->msg_type) {
10014 case NFT_MSG_NEWTABLE:
10015 if (nft_trans_table_update(trans)) {
10016 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
10017 nft_trans_destroy(trans);
10020 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
10021 nf_tables_table_disable(net, trans->ctx.table);
10023 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
10025 nft_clear(net, trans->ctx.table);
10027 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
10028 nft_trans_destroy(trans);
10030 case NFT_MSG_DELTABLE:
10031 case NFT_MSG_DESTROYTABLE:
10032 list_del_rcu(&trans->ctx.table->list);
10033 nf_tables_table_notify(&trans->ctx, trans->msg_type);
10035 case NFT_MSG_NEWCHAIN:
10036 if (nft_trans_chain_update(trans)) {
10037 nft_chain_commit_update(trans);
10038 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN,
10039 &nft_trans_chain_hooks(trans));
10040 list_splice(&nft_trans_chain_hooks(trans),
10041 &nft_trans_basechain(trans)->hook_list);
10042 /* trans destroyed after rcu grace period */
10044 nft_chain_commit_drop_policy(trans);
10045 nft_clear(net, trans->ctx.chain);
10046 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN, NULL);
10047 nft_trans_destroy(trans);
10050 case NFT_MSG_DELCHAIN:
10051 case NFT_MSG_DESTROYCHAIN:
10052 if (nft_trans_chain_update(trans)) {
10053 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
10054 &nft_trans_chain_hooks(trans));
10055 nft_netdev_unregister_hooks(net,
10056 &nft_trans_chain_hooks(trans),
10059 nft_chain_del(trans->ctx.chain);
10060 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN,
10062 nf_tables_unregister_hook(trans->ctx.net,
10067 case NFT_MSG_NEWRULE:
10068 nft_clear(trans->ctx.net, nft_trans_rule(trans));
10069 nf_tables_rule_notify(&trans->ctx,
10070 nft_trans_rule(trans),
10072 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10073 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10075 nft_trans_destroy(trans);
10077 case NFT_MSG_DELRULE:
10078 case NFT_MSG_DESTROYRULE:
10079 list_del_rcu(&nft_trans_rule(trans)->list);
10080 nf_tables_rule_notify(&trans->ctx,
10081 nft_trans_rule(trans),
10083 nft_rule_expr_deactivate(&trans->ctx,
10084 nft_trans_rule(trans),
10087 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10088 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10090 case NFT_MSG_NEWSET:
10091 if (nft_trans_set_update(trans)) {
10092 struct nft_set *set = nft_trans_set(trans);
10094 WRITE_ONCE(set->timeout, nft_trans_set_timeout(trans));
10095 WRITE_ONCE(set->gc_int, nft_trans_set_gc_int(trans));
10097 if (nft_trans_set_size(trans))
10098 WRITE_ONCE(set->size, nft_trans_set_size(trans));
10100 nft_clear(net, nft_trans_set(trans));
10101 /* This avoids hitting -EBUSY when deleting the table
10102 * from the transaction.
10104 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
10105 !list_empty(&nft_trans_set(trans)->bindings))
10106 nft_use_dec(&trans->ctx.table->use);
10108 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
10109 NFT_MSG_NEWSET, GFP_KERNEL);
10110 nft_trans_destroy(trans);
10112 case NFT_MSG_DELSET:
10113 case NFT_MSG_DESTROYSET:
10114 nft_trans_set(trans)->dead = 1;
10115 list_del_rcu(&nft_trans_set(trans)->list);
10116 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
10117 trans->msg_type, GFP_KERNEL);
10119 case NFT_MSG_NEWSETELEM:
10120 te = (struct nft_trans_elem *)trans->data;
10122 nft_setelem_activate(net, te->set, &te->elem);
10123 nf_tables_setelem_notify(&trans->ctx, te->set,
10125 NFT_MSG_NEWSETELEM);
10126 if (te->set->ops->commit &&
10127 list_empty(&te->set->pending_update)) {
10128 list_add_tail(&te->set->pending_update,
10131 nft_trans_destroy(trans);
10133 case NFT_MSG_DELSETELEM:
10134 case NFT_MSG_DESTROYSETELEM:
10135 te = (struct nft_trans_elem *)trans->data;
10137 nf_tables_setelem_notify(&trans->ctx, te->set,
10140 nft_setelem_remove(net, te->set, &te->elem);
10141 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
10142 atomic_dec(&te->set->nelems);
10145 if (te->set->ops->commit &&
10146 list_empty(&te->set->pending_update)) {
10147 list_add_tail(&te->set->pending_update,
10151 case NFT_MSG_NEWOBJ:
10152 if (nft_trans_obj_update(trans)) {
10153 nft_obj_commit_update(trans);
10154 nf_tables_obj_notify(&trans->ctx,
10155 nft_trans_obj(trans),
10158 nft_clear(net, nft_trans_obj(trans));
10159 nf_tables_obj_notify(&trans->ctx,
10160 nft_trans_obj(trans),
10162 nft_trans_destroy(trans);
10165 case NFT_MSG_DELOBJ:
10166 case NFT_MSG_DESTROYOBJ:
10167 nft_obj_del(nft_trans_obj(trans));
10168 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
10171 case NFT_MSG_NEWFLOWTABLE:
10172 if (nft_trans_flowtable_update(trans)) {
10173 nft_trans_flowtable(trans)->data.flags =
10174 nft_trans_flowtable_flags(trans);
10175 nf_tables_flowtable_notify(&trans->ctx,
10176 nft_trans_flowtable(trans),
10177 &nft_trans_flowtable_hooks(trans),
10178 NFT_MSG_NEWFLOWTABLE);
10179 list_splice(&nft_trans_flowtable_hooks(trans),
10180 &nft_trans_flowtable(trans)->hook_list);
10182 nft_clear(net, nft_trans_flowtable(trans));
10183 nf_tables_flowtable_notify(&trans->ctx,
10184 nft_trans_flowtable(trans),
10186 NFT_MSG_NEWFLOWTABLE);
10188 nft_trans_destroy(trans);
10190 case NFT_MSG_DELFLOWTABLE:
10191 case NFT_MSG_DESTROYFLOWTABLE:
10192 if (nft_trans_flowtable_update(trans)) {
10193 nf_tables_flowtable_notify(&trans->ctx,
10194 nft_trans_flowtable(trans),
10195 &nft_trans_flowtable_hooks(trans),
10197 nft_unregister_flowtable_net_hooks(net,
10198 &nft_trans_flowtable_hooks(trans));
10200 list_del_rcu(&nft_trans_flowtable(trans)->list);
10201 nf_tables_flowtable_notify(&trans->ctx,
10202 nft_trans_flowtable(trans),
10205 nft_unregister_flowtable_net_hooks(net,
10206 &nft_trans_flowtable(trans)->hook_list);
10212 nft_set_commit_update(&set_update_list);
10214 nft_commit_notify(net, NETLINK_CB(skb).portid);
10215 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
10216 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
10218 nft_gc_seq_end(nft_net, gc_seq);
10219 nft_net->validate_state = NFT_VALIDATE_SKIP;
10220 nf_tables_commit_release(net);
10225 static void nf_tables_module_autoload(struct net *net)
10227 struct nftables_pernet *nft_net = nft_pernet(net);
10228 struct nft_module_request *req, *next;
10229 LIST_HEAD(module_list);
10231 list_splice_init(&nft_net->module_list, &module_list);
10232 mutex_unlock(&nft_net->commit_mutex);
10233 list_for_each_entry_safe(req, next, &module_list, list) {
10234 request_module("%s", req->module);
10237 mutex_lock(&nft_net->commit_mutex);
10238 list_splice(&module_list, &nft_net->module_list);
10241 static void nf_tables_abort_release(struct nft_trans *trans)
10243 switch (trans->msg_type) {
10244 case NFT_MSG_NEWTABLE:
10245 nf_tables_table_destroy(&trans->ctx);
10247 case NFT_MSG_NEWCHAIN:
10248 if (nft_trans_chain_update(trans))
10249 nft_hooks_destroy(&nft_trans_chain_hooks(trans));
10251 nf_tables_chain_destroy(&trans->ctx);
10253 case NFT_MSG_NEWRULE:
10254 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
10256 case NFT_MSG_NEWSET:
10257 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
10259 case NFT_MSG_NEWSETELEM:
10260 nft_set_elem_destroy(nft_trans_elem_set(trans),
10261 nft_trans_elem(trans).priv, true);
10263 case NFT_MSG_NEWOBJ:
10264 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
10266 case NFT_MSG_NEWFLOWTABLE:
10267 if (nft_trans_flowtable_update(trans))
10268 nft_hooks_destroy(&nft_trans_flowtable_hooks(trans));
10270 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
10276 static void nft_set_abort_update(struct list_head *set_update_list)
10278 struct nft_set *set, *next;
10280 list_for_each_entry_safe(set, next, set_update_list, pending_update) {
10281 list_del_init(&set->pending_update);
10283 if (!set->ops->abort)
10286 set->ops->abort(set);
10290 static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
10292 struct nftables_pernet *nft_net = nft_pernet(net);
10293 struct nft_trans *trans, *next;
10294 LIST_HEAD(set_update_list);
10295 struct nft_trans_elem *te;
10297 if (action == NFNL_ABORT_VALIDATE &&
10298 nf_tables_validate(net) < 0)
10301 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
10303 switch (trans->msg_type) {
10304 case NFT_MSG_NEWTABLE:
10305 if (nft_trans_table_update(trans)) {
10306 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
10307 nft_trans_destroy(trans);
10310 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
10311 nf_tables_table_disable(net, trans->ctx.table);
10312 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
10313 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
10314 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
10316 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
10317 nft_trans_destroy(trans);
10319 list_del_rcu(&trans->ctx.table->list);
10322 case NFT_MSG_DELTABLE:
10323 case NFT_MSG_DESTROYTABLE:
10324 nft_clear(trans->ctx.net, trans->ctx.table);
10325 nft_trans_destroy(trans);
10327 case NFT_MSG_NEWCHAIN:
10328 if (nft_trans_chain_update(trans)) {
10329 nft_netdev_unregister_hooks(net,
10330 &nft_trans_chain_hooks(trans),
10332 free_percpu(nft_trans_chain_stats(trans));
10333 kfree(nft_trans_chain_name(trans));
10334 nft_trans_destroy(trans);
10336 if (nft_trans_chain_bound(trans)) {
10337 nft_trans_destroy(trans);
10340 nft_use_dec_restore(&trans->ctx.table->use);
10341 nft_chain_del(trans->ctx.chain);
10342 nf_tables_unregister_hook(trans->ctx.net,
10347 case NFT_MSG_DELCHAIN:
10348 case NFT_MSG_DESTROYCHAIN:
10349 if (nft_trans_chain_update(trans)) {
10350 list_splice(&nft_trans_chain_hooks(trans),
10351 &nft_trans_basechain(trans)->hook_list);
10353 nft_use_inc_restore(&trans->ctx.table->use);
10354 nft_clear(trans->ctx.net, trans->ctx.chain);
10356 nft_trans_destroy(trans);
10358 case NFT_MSG_NEWRULE:
10359 if (nft_trans_rule_bound(trans)) {
10360 nft_trans_destroy(trans);
10363 nft_use_dec_restore(&trans->ctx.chain->use);
10364 list_del_rcu(&nft_trans_rule(trans)->list);
10365 nft_rule_expr_deactivate(&trans->ctx,
10366 nft_trans_rule(trans),
10368 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10369 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10371 case NFT_MSG_DELRULE:
10372 case NFT_MSG_DESTROYRULE:
10373 nft_use_inc_restore(&trans->ctx.chain->use);
10374 nft_clear(trans->ctx.net, nft_trans_rule(trans));
10375 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
10376 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
10377 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
10379 nft_trans_destroy(trans);
10381 case NFT_MSG_NEWSET:
10382 if (nft_trans_set_update(trans)) {
10383 nft_trans_destroy(trans);
10386 nft_use_dec_restore(&trans->ctx.table->use);
10387 if (nft_trans_set_bound(trans)) {
10388 nft_trans_destroy(trans);
10391 list_del_rcu(&nft_trans_set(trans)->list);
10393 case NFT_MSG_DELSET:
10394 case NFT_MSG_DESTROYSET:
10395 nft_use_inc_restore(&trans->ctx.table->use);
10396 nft_clear(trans->ctx.net, nft_trans_set(trans));
10397 if (nft_trans_set(trans)->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
10398 nft_map_activate(&trans->ctx, nft_trans_set(trans));
10400 nft_trans_destroy(trans);
10402 case NFT_MSG_NEWSETELEM:
10403 if (nft_trans_elem_set_bound(trans)) {
10404 nft_trans_destroy(trans);
10407 te = (struct nft_trans_elem *)trans->data;
10408 nft_setelem_remove(net, te->set, &te->elem);
10409 if (!nft_setelem_is_catchall(te->set, &te->elem))
10410 atomic_dec(&te->set->nelems);
10412 if (te->set->ops->abort &&
10413 list_empty(&te->set->pending_update)) {
10414 list_add_tail(&te->set->pending_update,
10418 case NFT_MSG_DELSETELEM:
10419 case NFT_MSG_DESTROYSETELEM:
10420 te = (struct nft_trans_elem *)trans->data;
10422 nft_setelem_data_activate(net, te->set, &te->elem);
10423 nft_setelem_activate(net, te->set, &te->elem);
10424 if (!nft_setelem_is_catchall(te->set, &te->elem))
10427 if (te->set->ops->abort &&
10428 list_empty(&te->set->pending_update)) {
10429 list_add_tail(&te->set->pending_update,
10432 nft_trans_destroy(trans);
10434 case NFT_MSG_NEWOBJ:
10435 if (nft_trans_obj_update(trans)) {
10436 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
10437 nft_trans_destroy(trans);
10439 nft_use_dec_restore(&trans->ctx.table->use);
10440 nft_obj_del(nft_trans_obj(trans));
10443 case NFT_MSG_DELOBJ:
10444 case NFT_MSG_DESTROYOBJ:
10445 nft_use_inc_restore(&trans->ctx.table->use);
10446 nft_clear(trans->ctx.net, nft_trans_obj(trans));
10447 nft_trans_destroy(trans);
10449 case NFT_MSG_NEWFLOWTABLE:
10450 if (nft_trans_flowtable_update(trans)) {
10451 nft_unregister_flowtable_net_hooks(net,
10452 &nft_trans_flowtable_hooks(trans));
10454 nft_use_dec_restore(&trans->ctx.table->use);
10455 list_del_rcu(&nft_trans_flowtable(trans)->list);
10456 nft_unregister_flowtable_net_hooks(net,
10457 &nft_trans_flowtable(trans)->hook_list);
10460 case NFT_MSG_DELFLOWTABLE:
10461 case NFT_MSG_DESTROYFLOWTABLE:
10462 if (nft_trans_flowtable_update(trans)) {
10463 list_splice(&nft_trans_flowtable_hooks(trans),
10464 &nft_trans_flowtable(trans)->hook_list);
10466 nft_use_inc_restore(&trans->ctx.table->use);
10467 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
10469 nft_trans_destroy(trans);
10474 nft_set_abort_update(&set_update_list);
10478 list_for_each_entry_safe_reverse(trans, next,
10479 &nft_net->commit_list, list) {
10480 nft_trans_list_del(trans);
10481 nf_tables_abort_release(trans);
10484 if (action == NFNL_ABORT_AUTOLOAD)
10485 nf_tables_module_autoload(net);
10487 nf_tables_module_autoload_cleanup(net);
10492 static int nf_tables_abort(struct net *net, struct sk_buff *skb,
10493 enum nfnl_abort_action action)
10495 struct nftables_pernet *nft_net = nft_pernet(net);
10496 unsigned int gc_seq;
10499 gc_seq = nft_gc_seq_begin(nft_net);
10500 ret = __nf_tables_abort(net, action);
10501 nft_gc_seq_end(nft_net, gc_seq);
10502 mutex_unlock(&nft_net->commit_mutex);
10507 static bool nf_tables_valid_genid(struct net *net, u32 genid)
10509 struct nftables_pernet *nft_net = nft_pernet(net);
10512 mutex_lock(&nft_net->commit_mutex);
10514 genid_ok = genid == 0 || nft_net->base_seq == genid;
10516 mutex_unlock(&nft_net->commit_mutex);
10518 /* else, commit mutex has to be released by commit or abort function */
10522 static const struct nfnetlink_subsystem nf_tables_subsys = {
10523 .name = "nf_tables",
10524 .subsys_id = NFNL_SUBSYS_NFTABLES,
10525 .cb_count = NFT_MSG_MAX,
10526 .cb = nf_tables_cb,
10527 .commit = nf_tables_commit,
10528 .abort = nf_tables_abort,
10529 .valid_genid = nf_tables_valid_genid,
10530 .owner = THIS_MODULE,
10533 int nft_chain_validate_dependency(const struct nft_chain *chain,
10534 enum nft_chain_types type)
10536 const struct nft_base_chain *basechain;
10538 if (nft_is_base_chain(chain)) {
10539 basechain = nft_base_chain(chain);
10540 if (basechain->type->type != type)
10541 return -EOPNOTSUPP;
10545 EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
10547 int nft_chain_validate_hooks(const struct nft_chain *chain,
10548 unsigned int hook_flags)
10550 struct nft_base_chain *basechain;
10552 if (nft_is_base_chain(chain)) {
10553 basechain = nft_base_chain(chain);
10555 if ((1 << basechain->ops.hooknum) & hook_flags)
10558 return -EOPNOTSUPP;
10563 EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
10566 * Loop detection - walk through the ruleset beginning at the destination chain
10567 * of a new jump until either the source chain is reached (loop) or all
10568 * reachable chains have been traversed.
10570 * The loop check is performed whenever a new jump verdict is added to an
10571 * expression or verdict map or a verdict map is bound to a new chain.
10574 static int nf_tables_check_loops(const struct nft_ctx *ctx,
10575 const struct nft_chain *chain);
10577 static int nft_check_loops(const struct nft_ctx *ctx,
10578 const struct nft_set_ext *ext)
10580 const struct nft_data *data;
10583 data = nft_set_ext_data(ext);
10584 switch (data->verdict.code) {
10587 ret = nf_tables_check_loops(ctx, data->verdict.chain);
10597 static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
10598 struct nft_set *set,
10599 const struct nft_set_iter *iter,
10600 struct nft_set_elem *elem)
10602 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
10604 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
10605 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
10608 return nft_check_loops(ctx, ext);
10611 static int nft_set_catchall_loops(const struct nft_ctx *ctx,
10612 struct nft_set *set)
10614 u8 genmask = nft_genmask_next(ctx->net);
10615 struct nft_set_elem_catchall *catchall;
10616 struct nft_set_ext *ext;
10619 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
10620 ext = nft_set_elem_ext(set, catchall->elem);
10621 if (!nft_set_elem_active(ext, genmask))
10624 ret = nft_check_loops(ctx, ext);
10632 static int nf_tables_check_loops(const struct nft_ctx *ctx,
10633 const struct nft_chain *chain)
10635 const struct nft_rule *rule;
10636 const struct nft_expr *expr, *last;
10637 struct nft_set *set;
10638 struct nft_set_binding *binding;
10639 struct nft_set_iter iter;
10641 if (ctx->chain == chain)
10644 if (fatal_signal_pending(current))
10647 list_for_each_entry(rule, &chain->rules, list) {
10648 nft_rule_for_each_expr(expr, last, rule) {
10649 struct nft_immediate_expr *priv;
10650 const struct nft_data *data;
10653 if (strcmp(expr->ops->type->name, "immediate"))
10656 priv = nft_expr_priv(expr);
10657 if (priv->dreg != NFT_REG_VERDICT)
10660 data = &priv->data;
10661 switch (data->verdict.code) {
10664 err = nf_tables_check_loops(ctx,
10665 data->verdict.chain);
10675 list_for_each_entry(set, &ctx->table->sets, list) {
10676 if (!nft_is_active_next(ctx->net, set))
10678 if (!(set->flags & NFT_SET_MAP) ||
10679 set->dtype != NFT_DATA_VERDICT)
10682 list_for_each_entry(binding, &set->bindings, list) {
10683 if (!(binding->flags & NFT_SET_MAP) ||
10684 binding->chain != chain)
10687 iter.genmask = nft_genmask_next(ctx->net);
10691 iter.fn = nf_tables_loop_check_setelem;
10693 set->ops->walk(ctx, set, &iter);
10695 iter.err = nft_set_catchall_loops(ctx, set);
10706 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
10708 * @attr: netlink attribute to fetch value from
10709 * @max: maximum value to be stored in dest
10710 * @dest: pointer to the variable
10712 * Parse, check and store a given u32 netlink attribute into variable.
10713 * This function returns -ERANGE if the value goes over maximum value.
10714 * Otherwise a 0 is returned and the attribute value is stored in the
10715 * destination variable.
10717 int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
10721 val = ntohl(nla_get_be32(attr));
10728 EXPORT_SYMBOL_GPL(nft_parse_u32_check);
10730 static int nft_parse_register(const struct nlattr *attr, u32 *preg)
10734 reg = ntohl(nla_get_be32(attr));
10736 case NFT_REG_VERDICT...NFT_REG_4:
10737 *preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
10739 case NFT_REG32_00...NFT_REG32_15:
10740 *preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
10750 * nft_dump_register - dump a register value to a netlink attribute
10752 * @skb: socket buffer
10753 * @attr: attribute number
10754 * @reg: register number
10756 * Construct a netlink attribute containing the register number. For
10757 * compatibility reasons, register numbers being a multiple of 4 are
10758 * translated to the corresponding 128 bit register numbers.
10760 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
10762 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
10763 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
10765 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
10767 return nla_put_be32(skb, attr, htonl(reg));
10769 EXPORT_SYMBOL_GPL(nft_dump_register);
10771 static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
10773 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
10777 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
10783 int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
10788 err = nft_parse_register(attr, ®);
10792 err = nft_validate_register_load(reg, len);
10799 EXPORT_SYMBOL_GPL(nft_parse_register_load);
10801 static int nft_validate_register_store(const struct nft_ctx *ctx,
10802 enum nft_registers reg,
10803 const struct nft_data *data,
10804 enum nft_data_types type,
10810 case NFT_REG_VERDICT:
10811 if (type != NFT_DATA_VERDICT)
10814 if (data != NULL &&
10815 (data->verdict.code == NFT_GOTO ||
10816 data->verdict.code == NFT_JUMP)) {
10817 err = nf_tables_check_loops(ctx, data->verdict.chain);
10824 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
10828 if (reg * NFT_REG32_SIZE + len >
10829 sizeof_field(struct nft_regs, data))
10832 if (data != NULL && type != NFT_DATA_VALUE)
10838 int nft_parse_register_store(const struct nft_ctx *ctx,
10839 const struct nlattr *attr, u8 *dreg,
10840 const struct nft_data *data,
10841 enum nft_data_types type, unsigned int len)
10846 err = nft_parse_register(attr, ®);
10850 err = nft_validate_register_store(ctx, reg, data, type, len);
10857 EXPORT_SYMBOL_GPL(nft_parse_register_store);
10859 static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
10860 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
10861 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
10862 .len = NFT_CHAIN_MAXNAMELEN - 1 },
10863 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
10866 static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
10867 struct nft_data_desc *desc, const struct nlattr *nla)
10869 u8 genmask = nft_genmask_next(ctx->net);
10870 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
10871 struct nft_chain *chain;
10874 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
10875 nft_verdict_policy, NULL);
10879 if (!tb[NFTA_VERDICT_CODE])
10882 /* zero padding hole for memcmp */
10883 memset(data, 0, sizeof(*data));
10884 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
10886 switch (data->verdict.code) {
10888 switch (data->verdict.code & NF_VERDICT_MASK) {
10903 if (tb[NFTA_VERDICT_CHAIN]) {
10904 chain = nft_chain_lookup(ctx->net, ctx->table,
10905 tb[NFTA_VERDICT_CHAIN],
10907 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
10908 chain = nft_chain_lookup_byid(ctx->net, ctx->table,
10909 tb[NFTA_VERDICT_CHAIN_ID],
10912 return PTR_ERR(chain);
10918 return PTR_ERR(chain);
10919 if (nft_is_base_chain(chain))
10920 return -EOPNOTSUPP;
10921 if (nft_chain_is_bound(chain))
10923 if (desc->flags & NFT_DATA_DESC_SETELEM &&
10924 chain->flags & NFT_CHAIN_BINDING)
10926 if (!nft_use_inc(&chain->use))
10929 data->verdict.chain = chain;
10933 desc->len = sizeof(data->verdict);
10938 static void nft_verdict_uninit(const struct nft_data *data)
10940 struct nft_chain *chain;
10942 switch (data->verdict.code) {
10945 chain = data->verdict.chain;
10946 nft_use_dec(&chain->use);
10951 int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
10953 struct nlattr *nest;
10955 nest = nla_nest_start_noflag(skb, type);
10957 goto nla_put_failure;
10959 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
10960 goto nla_put_failure;
10965 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
10967 goto nla_put_failure;
10969 nla_nest_end(skb, nest);
10976 static int nft_value_init(const struct nft_ctx *ctx,
10977 struct nft_data *data, struct nft_data_desc *desc,
10978 const struct nlattr *nla)
10982 len = nla_len(nla);
10985 if (len > desc->size)
10988 if (len != desc->len)
10994 nla_memcpy(data->data, nla, len);
10999 static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
11002 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
11005 static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
11006 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
11007 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
11011 * nft_data_init - parse nf_tables data netlink attributes
11013 * @ctx: context of the expression using the data
11014 * @data: destination struct nft_data
11015 * @desc: data description
11016 * @nla: netlink attribute containing data
11018 * Parse the netlink data attributes and initialize a struct nft_data.
11019 * The type and length of data are returned in the data description.
11021 * The caller can indicate that it only wants to accept data of type
11022 * NFT_DATA_VALUE by passing NULL for the ctx argument.
11024 int nft_data_init(const struct nft_ctx *ctx, struct nft_data *data,
11025 struct nft_data_desc *desc, const struct nlattr *nla)
11027 struct nlattr *tb[NFTA_DATA_MAX + 1];
11030 if (WARN_ON_ONCE(!desc->size))
11033 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
11034 nft_data_policy, NULL);
11038 if (tb[NFTA_DATA_VALUE]) {
11039 if (desc->type != NFT_DATA_VALUE)
11042 err = nft_value_init(ctx, data, desc, tb[NFTA_DATA_VALUE]);
11043 } else if (tb[NFTA_DATA_VERDICT] && ctx != NULL) {
11044 if (desc->type != NFT_DATA_VERDICT)
11047 err = nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
11054 EXPORT_SYMBOL_GPL(nft_data_init);
11057 * nft_data_release - release a nft_data item
11059 * @data: struct nft_data to release
11060 * @type: type of data
11062 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
11063 * all others need to be released by calling this function.
11065 void nft_data_release(const struct nft_data *data, enum nft_data_types type)
11067 if (type < NFT_DATA_VERDICT)
11070 case NFT_DATA_VERDICT:
11071 return nft_verdict_uninit(data);
11076 EXPORT_SYMBOL_GPL(nft_data_release);
11078 int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
11079 enum nft_data_types type, unsigned int len)
11081 struct nlattr *nest;
11084 nest = nla_nest_start_noflag(skb, attr);
11089 case NFT_DATA_VALUE:
11090 err = nft_value_dump(skb, data, len);
11092 case NFT_DATA_VERDICT:
11093 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
11100 nla_nest_end(skb, nest);
11103 EXPORT_SYMBOL_GPL(nft_data_dump);
11105 int __nft_release_basechain(struct nft_ctx *ctx)
11107 struct nft_rule *rule, *nr;
11109 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
11112 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
11113 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
11114 list_del(&rule->list);
11115 nft_use_dec(&ctx->chain->use);
11116 nf_tables_rule_release(ctx, rule);
11118 nft_chain_del(ctx->chain);
11119 nft_use_dec(&ctx->table->use);
11120 nf_tables_chain_destroy(ctx);
11124 EXPORT_SYMBOL_GPL(__nft_release_basechain);
11126 static void __nft_release_hook(struct net *net, struct nft_table *table)
11128 struct nft_flowtable *flowtable;
11129 struct nft_chain *chain;
11131 list_for_each_entry(chain, &table->chains, list)
11132 __nf_tables_unregister_hook(net, table, chain, true);
11133 list_for_each_entry(flowtable, &table->flowtables, list)
11134 __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list,
11138 static void __nft_release_hooks(struct net *net)
11140 struct nftables_pernet *nft_net = nft_pernet(net);
11141 struct nft_table *table;
11143 list_for_each_entry(table, &nft_net->tables, list) {
11144 if (nft_table_has_owner(table))
11147 __nft_release_hook(net, table);
11151 static void __nft_release_table(struct net *net, struct nft_table *table)
11153 struct nft_flowtable *flowtable, *nf;
11154 struct nft_chain *chain, *nc;
11155 struct nft_object *obj, *ne;
11156 struct nft_rule *rule, *nr;
11157 struct nft_set *set, *ns;
11158 struct nft_ctx ctx = {
11160 .family = NFPROTO_NETDEV,
11163 ctx.family = table->family;
11165 list_for_each_entry(chain, &table->chains, list) {
11166 if (nft_chain_binding(chain))
11170 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
11171 list_del(&rule->list);
11172 nft_use_dec(&chain->use);
11173 nf_tables_rule_release(&ctx, rule);
11176 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
11177 list_del(&flowtable->list);
11178 nft_use_dec(&table->use);
11179 nf_tables_flowtable_destroy(flowtable);
11181 list_for_each_entry_safe(set, ns, &table->sets, list) {
11182 list_del(&set->list);
11183 nft_use_dec(&table->use);
11184 if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT))
11185 nft_map_deactivate(&ctx, set);
11187 nft_set_destroy(&ctx, set);
11189 list_for_each_entry_safe(obj, ne, &table->objects, list) {
11191 nft_use_dec(&table->use);
11192 nft_obj_destroy(&ctx, obj);
11194 list_for_each_entry_safe(chain, nc, &table->chains, list) {
11196 nft_chain_del(chain);
11197 nft_use_dec(&table->use);
11198 nf_tables_chain_destroy(&ctx);
11200 nf_tables_table_destroy(&ctx);
11203 static void __nft_release_tables(struct net *net)
11205 struct nftables_pernet *nft_net = nft_pernet(net);
11206 struct nft_table *table, *nt;
11208 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
11209 if (nft_table_has_owner(table))
11212 list_del(&table->list);
11214 __nft_release_table(net, table);
11218 static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
11221 struct nft_table *table, *to_delete[8];
11222 struct nftables_pernet *nft_net;
11223 struct netlink_notify *n = ptr;
11224 struct net *net = n->net;
11225 unsigned int deleted;
11226 bool restart = false;
11227 unsigned int gc_seq;
11229 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
11230 return NOTIFY_DONE;
11232 nft_net = nft_pernet(net);
11234 mutex_lock(&nft_net->commit_mutex);
11236 gc_seq = nft_gc_seq_begin(nft_net);
11238 if (!list_empty(&nf_tables_destroy_list))
11239 nf_tables_trans_destroy_flush_work();
11241 list_for_each_entry(table, &nft_net->tables, list) {
11242 if (nft_table_has_owner(table) &&
11243 n->portid == table->nlpid) {
11244 __nft_release_hook(net, table);
11245 list_del_rcu(&table->list);
11246 to_delete[deleted++] = table;
11247 if (deleted >= ARRAY_SIZE(to_delete))
11252 restart = deleted >= ARRAY_SIZE(to_delete);
11255 __nft_release_table(net, to_delete[--deleted]);
11260 nft_gc_seq_end(nft_net, gc_seq);
11262 mutex_unlock(&nft_net->commit_mutex);
11264 return NOTIFY_DONE;
11267 static struct notifier_block nft_nl_notifier = {
11268 .notifier_call = nft_rcv_nl_event,
11271 static int __net_init nf_tables_init_net(struct net *net)
11273 struct nftables_pernet *nft_net = nft_pernet(net);
11275 INIT_LIST_HEAD(&nft_net->tables);
11276 INIT_LIST_HEAD(&nft_net->commit_list);
11277 INIT_LIST_HEAD(&nft_net->binding_list);
11278 INIT_LIST_HEAD(&nft_net->module_list);
11279 INIT_LIST_HEAD(&nft_net->notify_list);
11280 mutex_init(&nft_net->commit_mutex);
11281 nft_net->base_seq = 1;
11282 nft_net->gc_seq = 0;
11283 nft_net->validate_state = NFT_VALIDATE_SKIP;
11288 static void __net_exit nf_tables_pre_exit_net(struct net *net)
11290 struct nftables_pernet *nft_net = nft_pernet(net);
11292 mutex_lock(&nft_net->commit_mutex);
11293 __nft_release_hooks(net);
11294 mutex_unlock(&nft_net->commit_mutex);
11297 static void __net_exit nf_tables_exit_net(struct net *net)
11299 struct nftables_pernet *nft_net = nft_pernet(net);
11300 unsigned int gc_seq;
11302 mutex_lock(&nft_net->commit_mutex);
11304 gc_seq = nft_gc_seq_begin(nft_net);
11306 if (!list_empty(&nft_net->commit_list) ||
11307 !list_empty(&nft_net->module_list))
11308 __nf_tables_abort(net, NFNL_ABORT_NONE);
11310 __nft_release_tables(net);
11312 nft_gc_seq_end(nft_net, gc_seq);
11314 mutex_unlock(&nft_net->commit_mutex);
11315 WARN_ON_ONCE(!list_empty(&nft_net->tables));
11316 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
11317 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
11320 static void nf_tables_exit_batch(struct list_head *net_exit_list)
11322 flush_work(&trans_gc_work);
11325 static struct pernet_operations nf_tables_net_ops = {
11326 .init = nf_tables_init_net,
11327 .pre_exit = nf_tables_pre_exit_net,
11328 .exit = nf_tables_exit_net,
11329 .exit_batch = nf_tables_exit_batch,
11330 .id = &nf_tables_net_id,
11331 .size = sizeof(struct nftables_pernet),
11334 static int __init nf_tables_module_init(void)
11338 err = register_pernet_subsys(&nf_tables_net_ops);
11342 err = nft_chain_filter_init();
11344 goto err_chain_filter;
11346 err = nf_tables_core_module_init();
11348 goto err_core_module;
11350 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
11352 goto err_netdev_notifier;
11354 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
11356 goto err_rht_objname;
11358 err = nft_offload_init();
11362 err = netlink_register_notifier(&nft_nl_notifier);
11364 goto err_netlink_notifier;
11367 err = nfnetlink_subsys_register(&nf_tables_subsys);
11369 goto err_nfnl_subsys;
11371 nft_chain_route_init();
11376 netlink_unregister_notifier(&nft_nl_notifier);
11377 err_netlink_notifier:
11378 nft_offload_exit();
11380 rhltable_destroy(&nft_objname_ht);
11382 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
11383 err_netdev_notifier:
11384 nf_tables_core_module_exit();
11386 nft_chain_filter_fini();
11388 unregister_pernet_subsys(&nf_tables_net_ops);
11392 static void __exit nf_tables_module_exit(void)
11394 nfnetlink_subsys_unregister(&nf_tables_subsys);
11395 netlink_unregister_notifier(&nft_nl_notifier);
11396 nft_offload_exit();
11397 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
11398 nft_chain_filter_fini();
11399 nft_chain_route_fini();
11400 unregister_pernet_subsys(&nf_tables_net_ops);
11401 cancel_work_sync(&trans_gc_work);
11402 cancel_work_sync(&trans_destroy_work);
11404 rhltable_destroy(&nft_objname_ht);
11405 nf_tables_core_module_exit();
11408 module_init(nf_tables_module_init);
11409 module_exit(nf_tables_module_exit);
11411 MODULE_LICENSE("GPL");
11412 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
11413 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);