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 DEFINE_SPINLOCK(nf_tables_destroy_list_lock);
35 static u64 table_handle;
38 NFT_VALIDATE_SKIP = 0,
43 static struct rhltable nft_objname_ht;
45 static u32 nft_chain_hash(const void *data, u32 len, u32 seed);
46 static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed);
47 static int nft_chain_hash_cmp(struct rhashtable_compare_arg *, const void *);
49 static u32 nft_objname_hash(const void *data, u32 len, u32 seed);
50 static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed);
51 static int nft_objname_hash_cmp(struct rhashtable_compare_arg *, const void *);
53 static const struct rhashtable_params nft_chain_ht_params = {
54 .head_offset = offsetof(struct nft_chain, rhlhead),
55 .key_offset = offsetof(struct nft_chain, name),
56 .hashfn = nft_chain_hash,
57 .obj_hashfn = nft_chain_hash_obj,
58 .obj_cmpfn = nft_chain_hash_cmp,
59 .automatic_shrinking = true,
62 static const struct rhashtable_params nft_objname_ht_params = {
63 .head_offset = offsetof(struct nft_object, rhlhead),
64 .key_offset = offsetof(struct nft_object, key),
65 .hashfn = nft_objname_hash,
66 .obj_hashfn = nft_objname_hash_obj,
67 .obj_cmpfn = nft_objname_hash_cmp,
68 .automatic_shrinking = true,
71 struct nft_audit_data {
72 struct nft_table *table;
75 struct list_head list;
78 static const u8 nft2audit_op[NFT_MSG_MAX] = { // enum nf_tables_msg_types
79 [NFT_MSG_NEWTABLE] = AUDIT_NFT_OP_TABLE_REGISTER,
80 [NFT_MSG_GETTABLE] = AUDIT_NFT_OP_INVALID,
81 [NFT_MSG_DELTABLE] = AUDIT_NFT_OP_TABLE_UNREGISTER,
82 [NFT_MSG_NEWCHAIN] = AUDIT_NFT_OP_CHAIN_REGISTER,
83 [NFT_MSG_GETCHAIN] = AUDIT_NFT_OP_INVALID,
84 [NFT_MSG_DELCHAIN] = AUDIT_NFT_OP_CHAIN_UNREGISTER,
85 [NFT_MSG_NEWRULE] = AUDIT_NFT_OP_RULE_REGISTER,
86 [NFT_MSG_GETRULE] = AUDIT_NFT_OP_INVALID,
87 [NFT_MSG_DELRULE] = AUDIT_NFT_OP_RULE_UNREGISTER,
88 [NFT_MSG_NEWSET] = AUDIT_NFT_OP_SET_REGISTER,
89 [NFT_MSG_GETSET] = AUDIT_NFT_OP_INVALID,
90 [NFT_MSG_DELSET] = AUDIT_NFT_OP_SET_UNREGISTER,
91 [NFT_MSG_NEWSETELEM] = AUDIT_NFT_OP_SETELEM_REGISTER,
92 [NFT_MSG_GETSETELEM] = AUDIT_NFT_OP_INVALID,
93 [NFT_MSG_DELSETELEM] = AUDIT_NFT_OP_SETELEM_UNREGISTER,
94 [NFT_MSG_NEWGEN] = AUDIT_NFT_OP_GEN_REGISTER,
95 [NFT_MSG_GETGEN] = AUDIT_NFT_OP_INVALID,
96 [NFT_MSG_TRACE] = AUDIT_NFT_OP_INVALID,
97 [NFT_MSG_NEWOBJ] = AUDIT_NFT_OP_OBJ_REGISTER,
98 [NFT_MSG_GETOBJ] = AUDIT_NFT_OP_INVALID,
99 [NFT_MSG_DELOBJ] = AUDIT_NFT_OP_OBJ_UNREGISTER,
100 [NFT_MSG_GETOBJ_RESET] = AUDIT_NFT_OP_OBJ_RESET,
101 [NFT_MSG_NEWFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_REGISTER,
102 [NFT_MSG_GETFLOWTABLE] = AUDIT_NFT_OP_INVALID,
103 [NFT_MSG_DELFLOWTABLE] = AUDIT_NFT_OP_FLOWTABLE_UNREGISTER,
106 static void nft_validate_state_update(struct net *net, u8 new_validate_state)
108 struct nftables_pernet *nft_net = nft_pernet(net);
110 switch (nft_net->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 nft_net->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_ctx_init(struct nft_ctx *ctx,
128 const struct sk_buff *skb,
129 const struct nlmsghdr *nlh,
131 struct nft_table *table,
132 struct nft_chain *chain,
133 const struct nlattr * const *nla)
136 ctx->family = family;
141 ctx->portid = NETLINK_CB(skb).portid;
142 ctx->report = nlmsg_report(nlh);
143 ctx->flags = nlh->nlmsg_flags;
144 ctx->seq = nlh->nlmsg_seq;
147 static struct nft_trans *nft_trans_alloc_gfp(const struct nft_ctx *ctx,
148 int msg_type, u32 size, gfp_t gfp)
150 struct nft_trans *trans;
152 trans = kzalloc(sizeof(struct nft_trans) + size, gfp);
156 trans->msg_type = msg_type;
162 static struct nft_trans *nft_trans_alloc(const struct nft_ctx *ctx,
163 int msg_type, u32 size)
165 return nft_trans_alloc_gfp(ctx, msg_type, size, GFP_KERNEL);
168 static void nft_trans_destroy(struct nft_trans *trans)
170 list_del(&trans->list);
174 static void nft_set_trans_bind(const struct nft_ctx *ctx, struct nft_set *set)
176 struct nftables_pernet *nft_net;
177 struct net *net = ctx->net;
178 struct nft_trans *trans;
180 if (!nft_set_is_anonymous(set))
183 nft_net = nft_pernet(net);
184 list_for_each_entry_reverse(trans, &nft_net->commit_list, list) {
185 switch (trans->msg_type) {
187 if (nft_trans_set(trans) == set)
188 nft_trans_set_bound(trans) = true;
190 case NFT_MSG_NEWSETELEM:
191 if (nft_trans_elem_set(trans) == set)
192 nft_trans_elem_set_bound(trans) = true;
198 static int nft_netdev_register_hooks(struct net *net,
199 struct list_head *hook_list)
201 struct nft_hook *hook;
205 list_for_each_entry(hook, hook_list, list) {
206 err = nf_register_net_hook(net, &hook->ops);
215 list_for_each_entry(hook, hook_list, list) {
219 nf_unregister_net_hook(net, &hook->ops);
224 static void nft_netdev_unregister_hooks(struct net *net,
225 struct list_head *hook_list)
227 struct nft_hook *hook;
229 list_for_each_entry(hook, hook_list, list)
230 nf_unregister_net_hook(net, &hook->ops);
233 static int nf_tables_register_hook(struct net *net,
234 const struct nft_table *table,
235 struct nft_chain *chain)
237 struct nft_base_chain *basechain;
238 const struct nf_hook_ops *ops;
240 if (table->flags & NFT_TABLE_F_DORMANT ||
241 !nft_is_base_chain(chain))
244 basechain = nft_base_chain(chain);
245 ops = &basechain->ops;
247 if (basechain->type->ops_register)
248 return basechain->type->ops_register(net, ops);
250 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
251 return nft_netdev_register_hooks(net, &basechain->hook_list);
253 return nf_register_net_hook(net, &basechain->ops);
256 static void nf_tables_unregister_hook(struct net *net,
257 const struct nft_table *table,
258 struct nft_chain *chain)
260 struct nft_base_chain *basechain;
261 const struct nf_hook_ops *ops;
263 if (table->flags & NFT_TABLE_F_DORMANT ||
264 !nft_is_base_chain(chain))
266 basechain = nft_base_chain(chain);
267 ops = &basechain->ops;
269 if (basechain->type->ops_unregister)
270 return basechain->type->ops_unregister(net, ops);
272 if (nft_base_chain_netdev(table->family, basechain->ops.hooknum))
273 nft_netdev_unregister_hooks(net, &basechain->hook_list);
275 nf_unregister_net_hook(net, &basechain->ops);
278 static void nft_trans_commit_list_add_tail(struct net *net, struct nft_trans *trans)
280 struct nftables_pernet *nft_net = nft_pernet(net);
282 list_add_tail(&trans->list, &nft_net->commit_list);
285 static int nft_trans_table_add(struct nft_ctx *ctx, int msg_type)
287 struct nft_trans *trans;
289 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_table));
293 if (msg_type == NFT_MSG_NEWTABLE)
294 nft_activate_next(ctx->net, ctx->table);
296 nft_trans_commit_list_add_tail(ctx->net, trans);
300 static int nft_deltable(struct nft_ctx *ctx)
304 err = nft_trans_table_add(ctx, NFT_MSG_DELTABLE);
308 nft_deactivate_next(ctx->net, ctx->table);
312 static struct nft_trans *nft_trans_chain_add(struct nft_ctx *ctx, int msg_type)
314 struct nft_trans *trans;
316 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_chain));
318 return ERR_PTR(-ENOMEM);
320 if (msg_type == NFT_MSG_NEWCHAIN) {
321 nft_activate_next(ctx->net, ctx->chain);
323 if (ctx->nla[NFTA_CHAIN_ID]) {
324 nft_trans_chain_id(trans) =
325 ntohl(nla_get_be32(ctx->nla[NFTA_CHAIN_ID]));
329 nft_trans_commit_list_add_tail(ctx->net, trans);
333 static int nft_delchain(struct nft_ctx *ctx)
335 struct nft_trans *trans;
337 trans = nft_trans_chain_add(ctx, NFT_MSG_DELCHAIN);
339 return PTR_ERR(trans);
342 nft_deactivate_next(ctx->net, ctx->chain);
347 static void nft_rule_expr_activate(const struct nft_ctx *ctx,
348 struct nft_rule *rule)
350 struct nft_expr *expr;
352 expr = nft_expr_first(rule);
353 while (nft_expr_more(rule, expr)) {
354 if (expr->ops->activate)
355 expr->ops->activate(ctx, expr);
357 expr = nft_expr_next(expr);
361 static void nft_rule_expr_deactivate(const struct nft_ctx *ctx,
362 struct nft_rule *rule,
363 enum nft_trans_phase phase)
365 struct nft_expr *expr;
367 expr = nft_expr_first(rule);
368 while (nft_expr_more(rule, expr)) {
369 if (expr->ops->deactivate)
370 expr->ops->deactivate(ctx, expr, phase);
372 expr = nft_expr_next(expr);
377 nf_tables_delrule_deactivate(struct nft_ctx *ctx, struct nft_rule *rule)
379 /* You cannot delete the same rule twice */
380 if (nft_is_active_next(ctx->net, rule)) {
381 nft_deactivate_next(ctx->net, rule);
388 static struct nft_trans *nft_trans_rule_add(struct nft_ctx *ctx, int msg_type,
389 struct nft_rule *rule)
391 struct nft_trans *trans;
393 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_rule));
397 if (msg_type == NFT_MSG_NEWRULE && ctx->nla[NFTA_RULE_ID] != NULL) {
398 nft_trans_rule_id(trans) =
399 ntohl(nla_get_be32(ctx->nla[NFTA_RULE_ID]));
401 nft_trans_rule(trans) = rule;
402 nft_trans_commit_list_add_tail(ctx->net, trans);
407 static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
409 struct nft_flow_rule *flow;
410 struct nft_trans *trans;
413 trans = nft_trans_rule_add(ctx, NFT_MSG_DELRULE, rule);
417 if (ctx->chain->flags & NFT_CHAIN_HW_OFFLOAD) {
418 flow = nft_flow_rule_create(ctx->net, rule);
420 nft_trans_destroy(trans);
421 return PTR_ERR(flow);
424 nft_trans_flow_rule(trans) = flow;
427 err = nf_tables_delrule_deactivate(ctx, rule);
429 nft_trans_destroy(trans);
432 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_PREPARE);
437 static int nft_delrule_by_chain(struct nft_ctx *ctx)
439 struct nft_rule *rule;
442 list_for_each_entry(rule, &ctx->chain->rules, list) {
443 if (!nft_is_active_next(ctx->net, rule))
446 err = nft_delrule(ctx, rule);
453 static int nft_trans_set_add(const struct nft_ctx *ctx, int msg_type,
456 struct nft_trans *trans;
458 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_set));
462 if (msg_type == NFT_MSG_NEWSET && ctx->nla[NFTA_SET_ID] != NULL) {
463 nft_trans_set_id(trans) =
464 ntohl(nla_get_be32(ctx->nla[NFTA_SET_ID]));
465 nft_activate_next(ctx->net, set);
467 nft_trans_set(trans) = set;
468 nft_trans_commit_list_add_tail(ctx->net, trans);
473 static int nft_delset(const struct nft_ctx *ctx, struct nft_set *set)
477 err = nft_trans_set_add(ctx, NFT_MSG_DELSET, set);
481 nft_deactivate_next(ctx->net, set);
487 static int nft_trans_obj_add(struct nft_ctx *ctx, int msg_type,
488 struct nft_object *obj)
490 struct nft_trans *trans;
492 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_obj));
496 if (msg_type == NFT_MSG_NEWOBJ)
497 nft_activate_next(ctx->net, obj);
499 nft_trans_obj(trans) = obj;
500 nft_trans_commit_list_add_tail(ctx->net, trans);
505 static int nft_delobj(struct nft_ctx *ctx, struct nft_object *obj)
509 err = nft_trans_obj_add(ctx, NFT_MSG_DELOBJ, obj);
513 nft_deactivate_next(ctx->net, obj);
519 static int nft_trans_flowtable_add(struct nft_ctx *ctx, int msg_type,
520 struct nft_flowtable *flowtable)
522 struct nft_trans *trans;
524 trans = nft_trans_alloc(ctx, msg_type,
525 sizeof(struct nft_trans_flowtable));
529 if (msg_type == NFT_MSG_NEWFLOWTABLE)
530 nft_activate_next(ctx->net, flowtable);
532 nft_trans_flowtable(trans) = flowtable;
533 nft_trans_commit_list_add_tail(ctx->net, trans);
538 static int nft_delflowtable(struct nft_ctx *ctx,
539 struct nft_flowtable *flowtable)
543 err = nft_trans_flowtable_add(ctx, NFT_MSG_DELFLOWTABLE, flowtable);
547 nft_deactivate_next(ctx->net, flowtable);
557 static struct nft_table *nft_table_lookup(const struct net *net,
558 const struct nlattr *nla,
559 u8 family, u8 genmask, u32 nlpid)
561 struct nftables_pernet *nft_net;
562 struct nft_table *table;
565 return ERR_PTR(-EINVAL);
567 nft_net = nft_pernet(net);
568 list_for_each_entry_rcu(table, &nft_net->tables, list,
569 lockdep_is_held(&nft_net->commit_mutex)) {
570 if (!nla_strcmp(nla, table->name) &&
571 table->family == family &&
572 nft_active_genmask(table, genmask)) {
573 if (nft_table_has_owner(table) &&
574 nlpid && table->nlpid != nlpid)
575 return ERR_PTR(-EPERM);
581 return ERR_PTR(-ENOENT);
584 static struct nft_table *nft_table_lookup_byhandle(const struct net *net,
585 const struct nlattr *nla,
586 u8 genmask, u32 nlpid)
588 struct nftables_pernet *nft_net;
589 struct nft_table *table;
591 nft_net = nft_pernet(net);
592 list_for_each_entry(table, &nft_net->tables, list) {
593 if (be64_to_cpu(nla_get_be64(nla)) == table->handle &&
594 nft_active_genmask(table, genmask)) {
595 if (nft_table_has_owner(table) &&
596 nlpid && table->nlpid != nlpid)
597 return ERR_PTR(-EPERM);
603 return ERR_PTR(-ENOENT);
606 static inline u64 nf_tables_alloc_handle(struct nft_table *table)
608 return ++table->hgenerator;
611 static const struct nft_chain_type *chain_type[NFPROTO_NUMPROTO][NFT_CHAIN_T_MAX];
613 static const struct nft_chain_type *
614 __nft_chain_type_get(u8 family, enum nft_chain_types type)
616 if (family >= NFPROTO_NUMPROTO ||
617 type >= NFT_CHAIN_T_MAX)
620 return chain_type[family][type];
623 static const struct nft_chain_type *
624 __nf_tables_chain_type_lookup(const struct nlattr *nla, u8 family)
626 const struct nft_chain_type *type;
629 for (i = 0; i < NFT_CHAIN_T_MAX; i++) {
630 type = __nft_chain_type_get(family, i);
633 if (!nla_strcmp(nla, type->name))
639 struct nft_module_request {
640 struct list_head list;
641 char module[MODULE_NAME_LEN];
645 #ifdef CONFIG_MODULES
646 __printf(2, 3) int nft_request_module(struct net *net, const char *fmt,
649 char module_name[MODULE_NAME_LEN];
650 struct nftables_pernet *nft_net;
651 struct nft_module_request *req;
656 ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
658 if (ret >= MODULE_NAME_LEN)
661 nft_net = nft_pernet(net);
662 list_for_each_entry(req, &nft_net->module_list, list) {
663 if (!strcmp(req->module, module_name)) {
667 /* A request to load this module already exists. */
672 req = kmalloc(sizeof(*req), GFP_KERNEL);
677 strlcpy(req->module, module_name, MODULE_NAME_LEN);
678 list_add_tail(&req->list, &nft_net->module_list);
682 EXPORT_SYMBOL_GPL(nft_request_module);
685 static void lockdep_nfnl_nft_mutex_not_held(void)
687 #ifdef CONFIG_PROVE_LOCKING
689 WARN_ON_ONCE(lockdep_nfnl_is_held(NFNL_SUBSYS_NFTABLES));
693 static const struct nft_chain_type *
694 nf_tables_chain_type_lookup(struct net *net, const struct nlattr *nla,
695 u8 family, bool autoload)
697 const struct nft_chain_type *type;
699 type = __nf_tables_chain_type_lookup(nla, family);
703 lockdep_nfnl_nft_mutex_not_held();
704 #ifdef CONFIG_MODULES
706 if (nft_request_module(net, "nft-chain-%u-%.*s", family,
708 (const char *)nla_data(nla)) == -EAGAIN)
709 return ERR_PTR(-EAGAIN);
712 return ERR_PTR(-ENOENT);
715 static __be16 nft_base_seq(const struct net *net)
717 struct nftables_pernet *nft_net = nft_pernet(net);
719 return htons(nft_net->base_seq & 0xffff);
722 static const struct nla_policy nft_table_policy[NFTA_TABLE_MAX + 1] = {
723 [NFTA_TABLE_NAME] = { .type = NLA_STRING,
724 .len = NFT_TABLE_MAXNAMELEN - 1 },
725 [NFTA_TABLE_FLAGS] = { .type = NLA_U32 },
726 [NFTA_TABLE_HANDLE] = { .type = NLA_U64 },
727 [NFTA_TABLE_USERDATA] = { .type = NLA_BINARY,
728 .len = NFT_USERDATA_MAXLEN }
731 static int nf_tables_fill_table_info(struct sk_buff *skb, struct net *net,
732 u32 portid, u32 seq, int event, u32 flags,
733 int family, const struct nft_table *table)
735 struct nlmsghdr *nlh;
737 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
738 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
739 NFNETLINK_V0, nft_base_seq(net));
741 goto nla_put_failure;
743 if (nla_put_string(skb, NFTA_TABLE_NAME, table->name) ||
744 nla_put_be32(skb, NFTA_TABLE_FLAGS,
745 htonl(table->flags & NFT_TABLE_F_MASK)) ||
746 nla_put_be32(skb, NFTA_TABLE_USE, htonl(table->use)) ||
747 nla_put_be64(skb, NFTA_TABLE_HANDLE, cpu_to_be64(table->handle),
749 goto nla_put_failure;
750 if (nft_table_has_owner(table) &&
751 nla_put_be32(skb, NFTA_TABLE_OWNER, htonl(table->nlpid)))
752 goto nla_put_failure;
755 if (nla_put(skb, NFTA_TABLE_USERDATA, table->udlen, table->udata))
756 goto nla_put_failure;
763 nlmsg_trim(skb, nlh);
767 struct nftnl_skb_parms {
770 #define NFT_CB(skb) (*(struct nftnl_skb_parms*)&((skb)->cb))
772 static void nft_notify_enqueue(struct sk_buff *skb, bool report,
773 struct list_head *notify_list)
775 NFT_CB(skb).report = report;
776 list_add_tail(&skb->list, notify_list);
779 static void nf_tables_table_notify(const struct nft_ctx *ctx, int event)
781 struct nftables_pernet *nft_net;
787 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
790 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
794 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
795 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
797 err = nf_tables_fill_table_info(skb, ctx->net, ctx->portid, ctx->seq,
798 event, flags, ctx->family, ctx->table);
804 nft_net = nft_pernet(ctx->net);
805 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
808 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
811 static int nf_tables_dump_tables(struct sk_buff *skb,
812 struct netlink_callback *cb)
814 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
815 struct nftables_pernet *nft_net;
816 const struct nft_table *table;
817 unsigned int idx = 0, s_idx = cb->args[0];
818 struct net *net = sock_net(skb->sk);
819 int family = nfmsg->nfgen_family;
822 nft_net = nft_pernet(net);
823 cb->seq = nft_net->base_seq;
825 list_for_each_entry_rcu(table, &nft_net->tables, list) {
826 if (family != NFPROTO_UNSPEC && family != table->family)
832 memset(&cb->args[1], 0,
833 sizeof(cb->args) - sizeof(cb->args[0]));
834 if (!nft_is_active(net, table))
836 if (nf_tables_fill_table_info(skb, net,
837 NETLINK_CB(cb->skb).portid,
839 NFT_MSG_NEWTABLE, NLM_F_MULTI,
840 table->family, table) < 0)
843 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
853 static int nft_netlink_dump_start_rcu(struct sock *nlsk, struct sk_buff *skb,
854 const struct nlmsghdr *nlh,
855 struct netlink_dump_control *c)
859 if (!try_module_get(THIS_MODULE))
863 err = netlink_dump_start(nlsk, skb, nlh, c);
865 module_put(THIS_MODULE);
870 /* called with rcu_read_lock held */
871 static int nf_tables_gettable(struct sk_buff *skb, const struct nfnl_info *info,
872 const struct nlattr * const nla[])
874 struct netlink_ext_ack *extack = info->extack;
875 u8 genmask = nft_genmask_cur(info->net);
876 u8 family = info->nfmsg->nfgen_family;
877 const struct nft_table *table;
878 struct net *net = info->net;
879 struct sk_buff *skb2;
882 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
883 struct netlink_dump_control c = {
884 .dump = nf_tables_dump_tables,
885 .module = THIS_MODULE,
888 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
891 table = nft_table_lookup(net, nla[NFTA_TABLE_NAME], family, genmask, 0);
893 NL_SET_BAD_ATTR(extack, nla[NFTA_TABLE_NAME]);
894 return PTR_ERR(table);
897 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
901 err = nf_tables_fill_table_info(skb2, net, NETLINK_CB(skb).portid,
902 info->nlh->nlmsg_seq, NFT_MSG_NEWTABLE,
905 goto err_fill_table_info;
907 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
914 static void nft_table_disable(struct net *net, struct nft_table *table, u32 cnt)
916 struct nft_chain *chain;
919 list_for_each_entry(chain, &table->chains, list) {
920 if (!nft_is_active_next(net, chain))
922 if (!nft_is_base_chain(chain))
925 if (cnt && i++ == cnt)
928 nf_tables_unregister_hook(net, table, chain);
932 static int nf_tables_table_enable(struct net *net, struct nft_table *table)
934 struct nft_chain *chain;
937 list_for_each_entry(chain, &table->chains, list) {
938 if (!nft_is_active_next(net, chain))
940 if (!nft_is_base_chain(chain))
943 err = nf_tables_register_hook(net, table, chain);
945 goto err_register_hooks;
953 nft_table_disable(net, table, i);
957 static void nf_tables_table_disable(struct net *net, struct nft_table *table)
959 table->flags &= ~NFT_TABLE_F_DORMANT;
960 nft_table_disable(net, table, 0);
961 table->flags |= NFT_TABLE_F_DORMANT;
964 #define __NFT_TABLE_F_INTERNAL (NFT_TABLE_F_MASK + 1)
965 #define __NFT_TABLE_F_WAS_DORMANT (__NFT_TABLE_F_INTERNAL << 0)
966 #define __NFT_TABLE_F_WAS_AWAKEN (__NFT_TABLE_F_INTERNAL << 1)
967 #define __NFT_TABLE_F_UPDATE (__NFT_TABLE_F_WAS_DORMANT | \
968 __NFT_TABLE_F_WAS_AWAKEN)
970 static int nf_tables_updtable(struct nft_ctx *ctx)
972 struct nft_trans *trans;
976 if (!ctx->nla[NFTA_TABLE_FLAGS])
979 flags = ntohl(nla_get_be32(ctx->nla[NFTA_TABLE_FLAGS]));
980 if (flags & ~NFT_TABLE_F_MASK)
983 if (flags == ctx->table->flags)
986 if ((nft_table_has_owner(ctx->table) &&
987 !(flags & NFT_TABLE_F_OWNER)) ||
988 (!nft_table_has_owner(ctx->table) &&
989 flags & NFT_TABLE_F_OWNER))
992 trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE,
993 sizeof(struct nft_trans_table));
997 if ((flags & NFT_TABLE_F_DORMANT) &&
998 !(ctx->table->flags & NFT_TABLE_F_DORMANT)) {
999 ctx->table->flags |= NFT_TABLE_F_DORMANT;
1000 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE))
1001 ctx->table->flags |= __NFT_TABLE_F_WAS_AWAKEN;
1002 } else if (!(flags & NFT_TABLE_F_DORMANT) &&
1003 ctx->table->flags & NFT_TABLE_F_DORMANT) {
1004 ctx->table->flags &= ~NFT_TABLE_F_DORMANT;
1005 if (!(ctx->table->flags & __NFT_TABLE_F_UPDATE)) {
1006 ret = nf_tables_table_enable(ctx->net, ctx->table);
1008 goto err_register_hooks;
1010 ctx->table->flags |= __NFT_TABLE_F_WAS_DORMANT;
1014 nft_trans_table_update(trans) = true;
1015 nft_trans_commit_list_add_tail(ctx->net, trans);
1020 nft_trans_destroy(trans);
1024 static u32 nft_chain_hash(const void *data, u32 len, u32 seed)
1026 const char *name = data;
1028 return jhash(name, strlen(name), seed);
1031 static u32 nft_chain_hash_obj(const void *data, u32 len, u32 seed)
1033 const struct nft_chain *chain = data;
1035 return nft_chain_hash(chain->name, 0, seed);
1038 static int nft_chain_hash_cmp(struct rhashtable_compare_arg *arg,
1041 const struct nft_chain *chain = ptr;
1042 const char *name = arg->key;
1044 return strcmp(chain->name, name);
1047 static u32 nft_objname_hash(const void *data, u32 len, u32 seed)
1049 const struct nft_object_hash_key *k = data;
1051 seed ^= hash_ptr(k->table, 32);
1053 return jhash(k->name, strlen(k->name), seed);
1056 static u32 nft_objname_hash_obj(const void *data, u32 len, u32 seed)
1058 const struct nft_object *obj = data;
1060 return nft_objname_hash(&obj->key, 0, seed);
1063 static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
1066 const struct nft_object_hash_key *k = arg->key;
1067 const struct nft_object *obj = ptr;
1069 if (obj->key.table != k->table)
1072 return strcmp(obj->key.name, k->name);
1075 static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
1076 const struct nlattr * const nla[])
1078 struct nftables_pernet *nft_net = nft_pernet(info->net);
1079 struct netlink_ext_ack *extack = info->extack;
1080 u8 genmask = nft_genmask_next(info->net);
1081 u8 family = info->nfmsg->nfgen_family;
1082 struct net *net = info->net;
1083 const struct nlattr *attr;
1084 struct nft_table *table;
1089 lockdep_assert_held(&nft_net->commit_mutex);
1090 attr = nla[NFTA_TABLE_NAME];
1091 table = nft_table_lookup(net, attr, family, genmask,
1092 NETLINK_CB(skb).portid);
1093 if (IS_ERR(table)) {
1094 if (PTR_ERR(table) != -ENOENT)
1095 return PTR_ERR(table);
1097 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
1098 NL_SET_BAD_ATTR(extack, attr);
1101 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
1104 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1106 return nf_tables_updtable(&ctx);
1109 if (nla[NFTA_TABLE_FLAGS]) {
1110 flags = ntohl(nla_get_be32(nla[NFTA_TABLE_FLAGS]));
1111 if (flags & ~NFT_TABLE_F_MASK)
1116 table = kzalloc(sizeof(*table), GFP_KERNEL);
1120 table->name = nla_strdup(attr, GFP_KERNEL);
1121 if (table->name == NULL)
1124 if (nla[NFTA_TABLE_USERDATA]) {
1125 table->udata = nla_memdup(nla[NFTA_TABLE_USERDATA], GFP_KERNEL);
1126 if (table->udata == NULL)
1127 goto err_table_udata;
1129 table->udlen = nla_len(nla[NFTA_TABLE_USERDATA]);
1132 err = rhltable_init(&table->chains_ht, &nft_chain_ht_params);
1136 INIT_LIST_HEAD(&table->chains);
1137 INIT_LIST_HEAD(&table->sets);
1138 INIT_LIST_HEAD(&table->objects);
1139 INIT_LIST_HEAD(&table->flowtables);
1140 table->family = family;
1141 table->flags = flags;
1142 table->handle = ++table_handle;
1143 if (table->flags & NFT_TABLE_F_OWNER)
1144 table->nlpid = NETLINK_CB(skb).portid;
1146 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
1147 err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
1151 list_add_tail_rcu(&table->list, &nft_net->tables);
1154 rhltable_destroy(&table->chains_ht);
1156 kfree(table->udata);
1165 static int nft_flush_table(struct nft_ctx *ctx)
1167 struct nft_flowtable *flowtable, *nft;
1168 struct nft_chain *chain, *nc;
1169 struct nft_object *obj, *ne;
1170 struct nft_set *set, *ns;
1173 list_for_each_entry(chain, &ctx->table->chains, list) {
1174 if (!nft_is_active_next(ctx->net, chain))
1177 if (nft_chain_is_bound(chain))
1182 err = nft_delrule_by_chain(ctx);
1187 list_for_each_entry_safe(set, ns, &ctx->table->sets, list) {
1188 if (!nft_is_active_next(ctx->net, set))
1191 if (nft_set_is_anonymous(set) &&
1192 !list_empty(&set->bindings))
1195 err = nft_delset(ctx, set);
1200 list_for_each_entry_safe(flowtable, nft, &ctx->table->flowtables, list) {
1201 if (!nft_is_active_next(ctx->net, flowtable))
1204 err = nft_delflowtable(ctx, flowtable);
1209 list_for_each_entry_safe(obj, ne, &ctx->table->objects, list) {
1210 if (!nft_is_active_next(ctx->net, obj))
1213 err = nft_delobj(ctx, obj);
1218 list_for_each_entry_safe(chain, nc, &ctx->table->chains, list) {
1219 if (!nft_is_active_next(ctx->net, chain))
1222 if (nft_chain_is_bound(chain))
1227 err = nft_delchain(ctx);
1232 err = nft_deltable(ctx);
1237 static int nft_flush(struct nft_ctx *ctx, int family)
1239 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
1240 const struct nlattr * const *nla = ctx->nla;
1241 struct nft_table *table, *nt;
1244 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
1245 if (family != AF_UNSPEC && table->family != family)
1248 ctx->family = table->family;
1250 if (!nft_is_active_next(ctx->net, table))
1253 if (nft_table_has_owner(table) && table->nlpid != ctx->portid)
1256 if (nla[NFTA_TABLE_NAME] &&
1257 nla_strcmp(nla[NFTA_TABLE_NAME], table->name) != 0)
1262 err = nft_flush_table(ctx);
1270 static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
1271 const struct nlattr * const nla[])
1273 struct netlink_ext_ack *extack = info->extack;
1274 u8 genmask = nft_genmask_next(info->net);
1275 u8 family = info->nfmsg->nfgen_family;
1276 struct net *net = info->net;
1277 const struct nlattr *attr;
1278 struct nft_table *table;
1281 nft_ctx_init(&ctx, net, skb, info->nlh, 0, NULL, NULL, nla);
1282 if (family == AF_UNSPEC ||
1283 (!nla[NFTA_TABLE_NAME] && !nla[NFTA_TABLE_HANDLE]))
1284 return nft_flush(&ctx, family);
1286 if (nla[NFTA_TABLE_HANDLE]) {
1287 attr = nla[NFTA_TABLE_HANDLE];
1288 table = nft_table_lookup_byhandle(net, attr, genmask,
1289 NETLINK_CB(skb).portid);
1291 attr = nla[NFTA_TABLE_NAME];
1292 table = nft_table_lookup(net, attr, family, genmask,
1293 NETLINK_CB(skb).portid);
1296 if (IS_ERR(table)) {
1297 NL_SET_BAD_ATTR(extack, attr);
1298 return PTR_ERR(table);
1301 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
1305 ctx.family = family;
1308 return nft_flush_table(&ctx);
1311 static void nf_tables_table_destroy(struct nft_ctx *ctx)
1313 if (WARN_ON(ctx->table->use > 0))
1316 rhltable_destroy(&ctx->table->chains_ht);
1317 kfree(ctx->table->name);
1318 kfree(ctx->table->udata);
1322 void nft_register_chain_type(const struct nft_chain_type *ctype)
1324 nfnl_lock(NFNL_SUBSYS_NFTABLES);
1325 if (WARN_ON(__nft_chain_type_get(ctype->family, ctype->type))) {
1326 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1329 chain_type[ctype->family][ctype->type] = ctype;
1330 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1332 EXPORT_SYMBOL_GPL(nft_register_chain_type);
1334 void nft_unregister_chain_type(const struct nft_chain_type *ctype)
1336 nfnl_lock(NFNL_SUBSYS_NFTABLES);
1337 chain_type[ctype->family][ctype->type] = NULL;
1338 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
1340 EXPORT_SYMBOL_GPL(nft_unregister_chain_type);
1346 static struct nft_chain *
1347 nft_chain_lookup_byhandle(const struct nft_table *table, u64 handle, u8 genmask)
1349 struct nft_chain *chain;
1351 list_for_each_entry(chain, &table->chains, list) {
1352 if (chain->handle == handle &&
1353 nft_active_genmask(chain, genmask))
1357 return ERR_PTR(-ENOENT);
1360 static bool lockdep_commit_lock_is_held(const struct net *net)
1362 #ifdef CONFIG_PROVE_LOCKING
1363 struct nftables_pernet *nft_net = nft_pernet(net);
1365 return lockdep_is_held(&nft_net->commit_mutex);
1371 static struct nft_chain *nft_chain_lookup(struct net *net,
1372 struct nft_table *table,
1373 const struct nlattr *nla, u8 genmask)
1375 char search[NFT_CHAIN_MAXNAMELEN + 1];
1376 struct rhlist_head *tmp, *list;
1377 struct nft_chain *chain;
1380 return ERR_PTR(-EINVAL);
1382 nla_strscpy(search, nla, sizeof(search));
1384 WARN_ON(!rcu_read_lock_held() &&
1385 !lockdep_commit_lock_is_held(net));
1387 chain = ERR_PTR(-ENOENT);
1389 list = rhltable_lookup(&table->chains_ht, search, nft_chain_ht_params);
1393 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
1394 if (nft_active_genmask(chain, genmask))
1397 chain = ERR_PTR(-ENOENT);
1403 static const struct nla_policy nft_chain_policy[NFTA_CHAIN_MAX + 1] = {
1404 [NFTA_CHAIN_TABLE] = { .type = NLA_STRING,
1405 .len = NFT_TABLE_MAXNAMELEN - 1 },
1406 [NFTA_CHAIN_HANDLE] = { .type = NLA_U64 },
1407 [NFTA_CHAIN_NAME] = { .type = NLA_STRING,
1408 .len = NFT_CHAIN_MAXNAMELEN - 1 },
1409 [NFTA_CHAIN_HOOK] = { .type = NLA_NESTED },
1410 [NFTA_CHAIN_POLICY] = { .type = NLA_U32 },
1411 [NFTA_CHAIN_TYPE] = { .type = NLA_STRING,
1412 .len = NFT_MODULE_AUTOLOAD_LIMIT },
1413 [NFTA_CHAIN_COUNTERS] = { .type = NLA_NESTED },
1414 [NFTA_CHAIN_FLAGS] = { .type = NLA_U32 },
1415 [NFTA_CHAIN_ID] = { .type = NLA_U32 },
1416 [NFTA_CHAIN_USERDATA] = { .type = NLA_BINARY,
1417 .len = NFT_USERDATA_MAXLEN },
1420 static const struct nla_policy nft_hook_policy[NFTA_HOOK_MAX + 1] = {
1421 [NFTA_HOOK_HOOKNUM] = { .type = NLA_U32 },
1422 [NFTA_HOOK_PRIORITY] = { .type = NLA_U32 },
1423 [NFTA_HOOK_DEV] = { .type = NLA_STRING,
1424 .len = IFNAMSIZ - 1 },
1427 static int nft_dump_stats(struct sk_buff *skb, struct nft_stats __percpu *stats)
1429 struct nft_stats *cpu_stats, total;
1430 struct nlattr *nest;
1438 memset(&total, 0, sizeof(total));
1439 for_each_possible_cpu(cpu) {
1440 cpu_stats = per_cpu_ptr(stats, cpu);
1442 seq = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1443 pkts = cpu_stats->pkts;
1444 bytes = cpu_stats->bytes;
1445 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, seq));
1447 total.bytes += bytes;
1449 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_COUNTERS);
1451 goto nla_put_failure;
1453 if (nla_put_be64(skb, NFTA_COUNTER_PACKETS, cpu_to_be64(total.pkts),
1454 NFTA_COUNTER_PAD) ||
1455 nla_put_be64(skb, NFTA_COUNTER_BYTES, cpu_to_be64(total.bytes),
1457 goto nla_put_failure;
1459 nla_nest_end(skb, nest);
1466 static int nft_dump_basechain_hook(struct sk_buff *skb, int family,
1467 const struct nft_base_chain *basechain)
1469 const struct nf_hook_ops *ops = &basechain->ops;
1470 struct nft_hook *hook, *first = NULL;
1471 struct nlattr *nest, *nest_devs;
1474 nest = nla_nest_start_noflag(skb, NFTA_CHAIN_HOOK);
1476 goto nla_put_failure;
1477 if (nla_put_be32(skb, NFTA_HOOK_HOOKNUM, htonl(ops->hooknum)))
1478 goto nla_put_failure;
1479 if (nla_put_be32(skb, NFTA_HOOK_PRIORITY, htonl(ops->priority)))
1480 goto nla_put_failure;
1482 if (nft_base_chain_netdev(family, ops->hooknum)) {
1483 nest_devs = nla_nest_start_noflag(skb, NFTA_HOOK_DEVS);
1484 list_for_each_entry(hook, &basechain->hook_list, list) {
1488 if (nla_put_string(skb, NFTA_DEVICE_NAME,
1489 hook->ops.dev->name))
1490 goto nla_put_failure;
1493 nla_nest_end(skb, nest_devs);
1496 nla_put_string(skb, NFTA_HOOK_DEV, first->ops.dev->name))
1497 goto nla_put_failure;
1499 nla_nest_end(skb, nest);
1506 static int nf_tables_fill_chain_info(struct sk_buff *skb, struct net *net,
1507 u32 portid, u32 seq, int event, u32 flags,
1508 int family, const struct nft_table *table,
1509 const struct nft_chain *chain)
1511 struct nlmsghdr *nlh;
1513 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
1514 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
1515 NFNETLINK_V0, nft_base_seq(net));
1517 goto nla_put_failure;
1519 if (nla_put_string(skb, NFTA_CHAIN_TABLE, table->name))
1520 goto nla_put_failure;
1521 if (nla_put_be64(skb, NFTA_CHAIN_HANDLE, cpu_to_be64(chain->handle),
1523 goto nla_put_failure;
1524 if (nla_put_string(skb, NFTA_CHAIN_NAME, chain->name))
1525 goto nla_put_failure;
1527 if (nft_is_base_chain(chain)) {
1528 const struct nft_base_chain *basechain = nft_base_chain(chain);
1529 struct nft_stats __percpu *stats;
1531 if (nft_dump_basechain_hook(skb, family, basechain))
1532 goto nla_put_failure;
1534 if (nla_put_be32(skb, NFTA_CHAIN_POLICY,
1535 htonl(basechain->policy)))
1536 goto nla_put_failure;
1538 if (nla_put_string(skb, NFTA_CHAIN_TYPE, basechain->type->name))
1539 goto nla_put_failure;
1541 stats = rcu_dereference_check(basechain->stats,
1542 lockdep_commit_lock_is_held(net));
1543 if (nft_dump_stats(skb, stats))
1544 goto nla_put_failure;
1548 nla_put_be32(skb, NFTA_CHAIN_FLAGS, htonl(chain->flags)))
1549 goto nla_put_failure;
1551 if (nla_put_be32(skb, NFTA_CHAIN_USE, htonl(chain->use)))
1552 goto nla_put_failure;
1555 nla_put(skb, NFTA_CHAIN_USERDATA, chain->udlen, chain->udata))
1556 goto nla_put_failure;
1558 nlmsg_end(skb, nlh);
1562 nlmsg_trim(skb, nlh);
1566 static void nf_tables_chain_notify(const struct nft_ctx *ctx, int event)
1568 struct nftables_pernet *nft_net;
1569 struct sk_buff *skb;
1574 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
1577 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1581 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
1582 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
1584 err = nf_tables_fill_chain_info(skb, ctx->net, ctx->portid, ctx->seq,
1585 event, flags, ctx->family, ctx->table,
1592 nft_net = nft_pernet(ctx->net);
1593 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
1596 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
1599 static int nf_tables_dump_chains(struct sk_buff *skb,
1600 struct netlink_callback *cb)
1602 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
1603 unsigned int idx = 0, s_idx = cb->args[0];
1604 struct net *net = sock_net(skb->sk);
1605 int family = nfmsg->nfgen_family;
1606 struct nftables_pernet *nft_net;
1607 const struct nft_table *table;
1608 const struct nft_chain *chain;
1611 nft_net = nft_pernet(net);
1612 cb->seq = nft_net->base_seq;
1614 list_for_each_entry_rcu(table, &nft_net->tables, list) {
1615 if (family != NFPROTO_UNSPEC && family != table->family)
1618 list_for_each_entry_rcu(chain, &table->chains, list) {
1622 memset(&cb->args[1], 0,
1623 sizeof(cb->args) - sizeof(cb->args[0]));
1624 if (!nft_is_active(net, chain))
1626 if (nf_tables_fill_chain_info(skb, net,
1627 NETLINK_CB(cb->skb).portid,
1631 table->family, table,
1635 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1646 /* called with rcu_read_lock held */
1647 static int nf_tables_getchain(struct sk_buff *skb, const struct nfnl_info *info,
1648 const struct nlattr * const nla[])
1650 struct netlink_ext_ack *extack = info->extack;
1651 u8 genmask = nft_genmask_cur(info->net);
1652 u8 family = info->nfmsg->nfgen_family;
1653 const struct nft_chain *chain;
1654 struct net *net = info->net;
1655 struct nft_table *table;
1656 struct sk_buff *skb2;
1659 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
1660 struct netlink_dump_control c = {
1661 .dump = nf_tables_dump_chains,
1662 .module = THIS_MODULE,
1665 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
1668 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask, 0);
1669 if (IS_ERR(table)) {
1670 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
1671 return PTR_ERR(table);
1674 chain = nft_chain_lookup(net, table, nla[NFTA_CHAIN_NAME], genmask);
1675 if (IS_ERR(chain)) {
1676 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
1677 return PTR_ERR(chain);
1680 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
1684 err = nf_tables_fill_chain_info(skb2, net, NETLINK_CB(skb).portid,
1685 info->nlh->nlmsg_seq, NFT_MSG_NEWCHAIN,
1686 0, family, table, chain);
1688 goto err_fill_chain_info;
1690 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
1692 err_fill_chain_info:
1697 static const struct nla_policy nft_counter_policy[NFTA_COUNTER_MAX + 1] = {
1698 [NFTA_COUNTER_PACKETS] = { .type = NLA_U64 },
1699 [NFTA_COUNTER_BYTES] = { .type = NLA_U64 },
1702 static struct nft_stats __percpu *nft_stats_alloc(const struct nlattr *attr)
1704 struct nlattr *tb[NFTA_COUNTER_MAX+1];
1705 struct nft_stats __percpu *newstats;
1706 struct nft_stats *stats;
1709 err = nla_parse_nested_deprecated(tb, NFTA_COUNTER_MAX, attr,
1710 nft_counter_policy, NULL);
1712 return ERR_PTR(err);
1714 if (!tb[NFTA_COUNTER_BYTES] || !tb[NFTA_COUNTER_PACKETS])
1715 return ERR_PTR(-EINVAL);
1717 newstats = netdev_alloc_pcpu_stats(struct nft_stats);
1718 if (newstats == NULL)
1719 return ERR_PTR(-ENOMEM);
1721 /* Restore old counters on this cpu, no problem. Per-cpu statistics
1722 * are not exposed to userspace.
1725 stats = this_cpu_ptr(newstats);
1726 stats->bytes = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_BYTES]));
1727 stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS]));
1733 static void nft_chain_stats_replace(struct nft_trans *trans)
1735 struct nft_base_chain *chain = nft_base_chain(trans->ctx.chain);
1737 if (!nft_trans_chain_stats(trans))
1740 nft_trans_chain_stats(trans) =
1741 rcu_replace_pointer(chain->stats, nft_trans_chain_stats(trans),
1742 lockdep_commit_lock_is_held(trans->ctx.net));
1744 if (!nft_trans_chain_stats(trans))
1745 static_branch_inc(&nft_counters_enabled);
1748 static void nf_tables_chain_free_chain_rules(struct nft_chain *chain)
1750 struct nft_rule_blob *g0 = rcu_dereference_raw(chain->blob_gen_0);
1751 struct nft_rule_blob *g1 = rcu_dereference_raw(chain->blob_gen_1);
1757 /* should be NULL either via abort or via successful commit */
1758 WARN_ON_ONCE(chain->blob_next);
1759 kvfree(chain->blob_next);
1762 void nf_tables_chain_destroy(struct nft_ctx *ctx)
1764 struct nft_chain *chain = ctx->chain;
1765 struct nft_hook *hook, *next;
1767 if (WARN_ON(chain->use > 0))
1770 /* no concurrent access possible anymore */
1771 nf_tables_chain_free_chain_rules(chain);
1773 if (nft_is_base_chain(chain)) {
1774 struct nft_base_chain *basechain = nft_base_chain(chain);
1776 if (nft_base_chain_netdev(ctx->family, basechain->ops.hooknum)) {
1777 list_for_each_entry_safe(hook, next,
1778 &basechain->hook_list, list) {
1779 list_del_rcu(&hook->list);
1780 kfree_rcu(hook, rcu);
1783 module_put(basechain->type->owner);
1784 if (rcu_access_pointer(basechain->stats)) {
1785 static_branch_dec(&nft_counters_enabled);
1786 free_percpu(rcu_dereference_raw(basechain->stats));
1789 kfree(chain->udata);
1793 kfree(chain->udata);
1798 static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
1799 const struct nlattr *attr)
1801 struct net_device *dev;
1802 char ifname[IFNAMSIZ];
1803 struct nft_hook *hook;
1806 hook = kmalloc(sizeof(struct nft_hook), GFP_KERNEL);
1809 goto err_hook_alloc;
1812 nla_strscpy(ifname, attr, IFNAMSIZ);
1813 /* nf_tables_netdev_event() is called under rtnl_mutex, this is
1814 * indirectly serializing all the other holders of the commit_mutex with
1817 dev = __dev_get_by_name(net, ifname);
1822 hook->ops.dev = dev;
1823 hook->inactive = false;
1830 return ERR_PTR(err);
1833 static struct nft_hook *nft_hook_list_find(struct list_head *hook_list,
1834 const struct nft_hook *this)
1836 struct nft_hook *hook;
1838 list_for_each_entry(hook, hook_list, list) {
1839 if (this->ops.dev == hook->ops.dev)
1846 static int nf_tables_parse_netdev_hooks(struct net *net,
1847 const struct nlattr *attr,
1848 struct list_head *hook_list)
1850 struct nft_hook *hook, *next;
1851 const struct nlattr *tmp;
1852 int rem, n = 0, err;
1854 nla_for_each_nested(tmp, attr, rem) {
1855 if (nla_type(tmp) != NFTA_DEVICE_NAME) {
1860 hook = nft_netdev_hook_alloc(net, tmp);
1862 err = PTR_ERR(hook);
1865 if (nft_hook_list_find(hook_list, hook)) {
1870 list_add_tail(&hook->list, hook_list);
1873 if (n == NFT_NETDEVICE_MAX) {
1882 list_for_each_entry_safe(hook, next, hook_list, list) {
1883 list_del(&hook->list);
1889 struct nft_chain_hook {
1892 const struct nft_chain_type *type;
1893 struct list_head list;
1896 static int nft_chain_parse_netdev(struct net *net,
1897 struct nlattr *tb[],
1898 struct list_head *hook_list)
1900 struct nft_hook *hook;
1903 if (tb[NFTA_HOOK_DEV]) {
1904 hook = nft_netdev_hook_alloc(net, tb[NFTA_HOOK_DEV]);
1906 return PTR_ERR(hook);
1908 list_add_tail(&hook->list, hook_list);
1909 } else if (tb[NFTA_HOOK_DEVS]) {
1910 err = nf_tables_parse_netdev_hooks(net, tb[NFTA_HOOK_DEVS],
1915 if (list_empty(hook_list))
1924 static int nft_chain_parse_hook(struct net *net,
1925 const struct nlattr * const nla[],
1926 struct nft_chain_hook *hook, u8 family,
1927 struct netlink_ext_ack *extack, bool autoload)
1929 struct nftables_pernet *nft_net = nft_pernet(net);
1930 struct nlattr *ha[NFTA_HOOK_MAX + 1];
1931 const struct nft_chain_type *type;
1934 lockdep_assert_held(&nft_net->commit_mutex);
1935 lockdep_nfnl_nft_mutex_not_held();
1937 err = nla_parse_nested_deprecated(ha, NFTA_HOOK_MAX,
1938 nla[NFTA_CHAIN_HOOK],
1939 nft_hook_policy, NULL);
1943 if (ha[NFTA_HOOK_HOOKNUM] == NULL ||
1944 ha[NFTA_HOOK_PRIORITY] == NULL)
1947 hook->num = ntohl(nla_get_be32(ha[NFTA_HOOK_HOOKNUM]));
1948 hook->priority = ntohl(nla_get_be32(ha[NFTA_HOOK_PRIORITY]));
1950 type = __nft_chain_type_get(family, NFT_CHAIN_T_DEFAULT);
1954 if (nla[NFTA_CHAIN_TYPE]) {
1955 type = nf_tables_chain_type_lookup(net, nla[NFTA_CHAIN_TYPE],
1958 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
1959 return PTR_ERR(type);
1962 if (hook->num >= NFT_MAX_HOOKS || !(type->hook_mask & (1 << hook->num)))
1965 if (type->type == NFT_CHAIN_T_NAT &&
1966 hook->priority <= NF_IP_PRI_CONNTRACK)
1969 if (!try_module_get(type->owner)) {
1970 if (nla[NFTA_CHAIN_TYPE])
1971 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TYPE]);
1977 INIT_LIST_HEAD(&hook->list);
1978 if (nft_base_chain_netdev(family, hook->num)) {
1979 err = nft_chain_parse_netdev(net, ha, &hook->list);
1981 module_put(type->owner);
1984 } else if (ha[NFTA_HOOK_DEV] || ha[NFTA_HOOK_DEVS]) {
1985 module_put(type->owner);
1992 static void nft_chain_release_hook(struct nft_chain_hook *hook)
1994 struct nft_hook *h, *next;
1996 list_for_each_entry_safe(h, next, &hook->list, list) {
2000 module_put(hook->type->owner);
2003 struct nft_rules_old {
2005 struct nft_rule_blob *blob;
2008 static void nft_last_rule(struct nft_rule_blob *blob, const void *ptr)
2010 struct nft_rule_dp *prule;
2012 prule = (struct nft_rule_dp *)ptr;
2014 /* blob size does not include the trailer rule */
2017 static struct nft_rule_blob *nf_tables_chain_alloc_rules(unsigned int size)
2019 struct nft_rule_blob *blob;
2021 /* size must include room for the last rule */
2022 if (size < offsetof(struct nft_rule_dp, data))
2025 size += sizeof(struct nft_rule_blob) + sizeof(struct nft_rules_old);
2029 blob = kvmalloc(size, GFP_KERNEL);
2034 nft_last_rule(blob, blob->data);
2039 static void nft_basechain_hook_init(struct nf_hook_ops *ops, u8 family,
2040 const struct nft_chain_hook *hook,
2041 struct nft_chain *chain)
2044 ops->hooknum = hook->num;
2045 ops->priority = hook->priority;
2047 ops->hook = hook->type->hooks[ops->hooknum];
2048 ops->hook_ops_type = NF_HOOK_OP_NF_TABLES;
2051 static int nft_basechain_init(struct nft_base_chain *basechain, u8 family,
2052 struct nft_chain_hook *hook, u32 flags)
2054 struct nft_chain *chain;
2057 basechain->type = hook->type;
2058 INIT_LIST_HEAD(&basechain->hook_list);
2059 chain = &basechain->chain;
2061 if (nft_base_chain_netdev(family, hook->num)) {
2062 list_splice_init(&hook->list, &basechain->hook_list);
2063 list_for_each_entry(h, &basechain->hook_list, list)
2064 nft_basechain_hook_init(&h->ops, family, hook, chain);
2066 basechain->ops.hooknum = hook->num;
2067 basechain->ops.priority = hook->priority;
2069 nft_basechain_hook_init(&basechain->ops, family, hook, chain);
2072 chain->flags |= NFT_CHAIN_BASE | flags;
2073 basechain->policy = NF_ACCEPT;
2074 if (chain->flags & NFT_CHAIN_HW_OFFLOAD &&
2075 nft_chain_offload_priority(basechain) < 0)
2078 flow_block_init(&basechain->flow_block);
2083 static int nft_chain_add(struct nft_table *table, struct nft_chain *chain)
2087 err = rhltable_insert_key(&table->chains_ht, chain->name,
2088 &chain->rhlhead, nft_chain_ht_params);
2092 list_add_tail_rcu(&chain->list, &table->chains);
2097 static u64 chain_id;
2099 static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask,
2100 u8 policy, u32 flags,
2101 struct netlink_ext_ack *extack)
2103 const struct nlattr * const *nla = ctx->nla;
2104 struct nft_table *table = ctx->table;
2105 struct nft_base_chain *basechain;
2106 struct nft_stats __percpu *stats;
2107 struct net *net = ctx->net;
2108 char name[NFT_NAME_MAXLEN];
2109 struct nft_rule_blob *blob;
2110 struct nft_trans *trans;
2111 struct nft_chain *chain;
2112 unsigned int data_size;
2115 if (table->use == UINT_MAX)
2118 if (nla[NFTA_CHAIN_HOOK]) {
2119 struct nft_chain_hook hook;
2121 if (flags & NFT_CHAIN_BINDING)
2124 err = nft_chain_parse_hook(net, nla, &hook, family, extack,
2129 basechain = kzalloc(sizeof(*basechain), GFP_KERNEL);
2130 if (basechain == NULL) {
2131 nft_chain_release_hook(&hook);
2134 chain = &basechain->chain;
2136 if (nla[NFTA_CHAIN_COUNTERS]) {
2137 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2138 if (IS_ERR(stats)) {
2139 nft_chain_release_hook(&hook);
2141 return PTR_ERR(stats);
2143 rcu_assign_pointer(basechain->stats, stats);
2144 static_branch_inc(&nft_counters_enabled);
2147 err = nft_basechain_init(basechain, family, &hook, flags);
2149 nft_chain_release_hook(&hook);
2154 if (flags & NFT_CHAIN_BASE)
2156 if (flags & NFT_CHAIN_HW_OFFLOAD)
2159 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
2163 chain->flags = flags;
2167 INIT_LIST_HEAD(&chain->rules);
2168 chain->handle = nf_tables_alloc_handle(table);
2169 chain->table = table;
2171 if (nla[NFTA_CHAIN_NAME]) {
2172 chain->name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL);
2174 if (!(flags & NFT_CHAIN_BINDING)) {
2176 goto err_destroy_chain;
2179 snprintf(name, sizeof(name), "__chain%llu", ++chain_id);
2180 chain->name = kstrdup(name, GFP_KERNEL);
2185 goto err_destroy_chain;
2188 if (nla[NFTA_CHAIN_USERDATA]) {
2189 chain->udata = nla_memdup(nla[NFTA_CHAIN_USERDATA], GFP_KERNEL);
2190 if (chain->udata == NULL) {
2192 goto err_destroy_chain;
2194 chain->udlen = nla_len(nla[NFTA_CHAIN_USERDATA]);
2197 data_size = offsetof(struct nft_rule_dp, data); /* last rule */
2198 blob = nf_tables_chain_alloc_rules(data_size);
2201 goto err_destroy_chain;
2204 RCU_INIT_POINTER(chain->blob_gen_0, blob);
2205 RCU_INIT_POINTER(chain->blob_gen_1, blob);
2207 err = nf_tables_register_hook(net, table, chain);
2209 goto err_destroy_chain;
2211 trans = nft_trans_chain_add(ctx, NFT_MSG_NEWCHAIN);
2212 if (IS_ERR(trans)) {
2213 err = PTR_ERR(trans);
2214 goto err_unregister_hook;
2217 nft_trans_chain_policy(trans) = NFT_CHAIN_POLICY_UNSET;
2218 if (nft_is_base_chain(chain))
2219 nft_trans_chain_policy(trans) = policy;
2221 err = nft_chain_add(table, chain);
2223 nft_trans_destroy(trans);
2224 goto err_unregister_hook;
2230 err_unregister_hook:
2231 nf_tables_unregister_hook(net, table, chain);
2233 nf_tables_chain_destroy(ctx);
2238 static bool nft_hook_list_equal(struct list_head *hook_list1,
2239 struct list_head *hook_list2)
2241 struct nft_hook *hook;
2245 list_for_each_entry(hook, hook_list2, list) {
2246 if (!nft_hook_list_find(hook_list1, hook))
2251 list_for_each_entry(hook, hook_list1, list)
2257 static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,
2258 u32 flags, const struct nlattr *attr,
2259 struct netlink_ext_ack *extack)
2261 const struct nlattr * const *nla = ctx->nla;
2262 struct nft_table *table = ctx->table;
2263 struct nft_chain *chain = ctx->chain;
2264 struct nft_base_chain *basechain;
2265 struct nft_stats *stats = NULL;
2266 struct nft_chain_hook hook;
2267 struct nf_hook_ops *ops;
2268 struct nft_trans *trans;
2271 if (chain->flags ^ flags)
2274 if (nla[NFTA_CHAIN_HOOK]) {
2275 if (!nft_is_base_chain(chain)) {
2276 NL_SET_BAD_ATTR(extack, attr);
2279 err = nft_chain_parse_hook(ctx->net, nla, &hook, ctx->family,
2284 basechain = nft_base_chain(chain);
2285 if (basechain->type != hook.type) {
2286 nft_chain_release_hook(&hook);
2287 NL_SET_BAD_ATTR(extack, attr);
2291 if (nft_base_chain_netdev(ctx->family, hook.num)) {
2292 if (!nft_hook_list_equal(&basechain->hook_list,
2294 nft_chain_release_hook(&hook);
2295 NL_SET_BAD_ATTR(extack, attr);
2299 ops = &basechain->ops;
2300 if (ops->hooknum != hook.num ||
2301 ops->priority != hook.priority) {
2302 nft_chain_release_hook(&hook);
2303 NL_SET_BAD_ATTR(extack, attr);
2307 nft_chain_release_hook(&hook);
2310 if (nla[NFTA_CHAIN_HANDLE] &&
2311 nla[NFTA_CHAIN_NAME]) {
2312 struct nft_chain *chain2;
2314 chain2 = nft_chain_lookup(ctx->net, table,
2315 nla[NFTA_CHAIN_NAME], genmask);
2316 if (!IS_ERR(chain2)) {
2317 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2322 if (nla[NFTA_CHAIN_COUNTERS]) {
2323 if (!nft_is_base_chain(chain))
2326 stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);
2328 return PTR_ERR(stats);
2332 trans = nft_trans_alloc(ctx, NFT_MSG_NEWCHAIN,
2333 sizeof(struct nft_trans_chain));
2337 nft_trans_chain_stats(trans) = stats;
2338 nft_trans_chain_update(trans) = true;
2340 if (nla[NFTA_CHAIN_POLICY])
2341 nft_trans_chain_policy(trans) = policy;
2343 nft_trans_chain_policy(trans) = -1;
2345 if (nla[NFTA_CHAIN_HANDLE] &&
2346 nla[NFTA_CHAIN_NAME]) {
2347 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
2348 struct nft_trans *tmp;
2352 name = nla_strdup(nla[NFTA_CHAIN_NAME], GFP_KERNEL);
2357 list_for_each_entry(tmp, &nft_net->commit_list, list) {
2358 if (tmp->msg_type == NFT_MSG_NEWCHAIN &&
2359 tmp->ctx.table == table &&
2360 nft_trans_chain_update(tmp) &&
2361 nft_trans_chain_name(tmp) &&
2362 strcmp(name, nft_trans_chain_name(tmp)) == 0) {
2363 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_NAME]);
2369 nft_trans_chain_name(trans) = name;
2371 nft_trans_commit_list_add_tail(ctx->net, trans);
2380 static struct nft_chain *nft_chain_lookup_byid(const struct net *net,
2381 const struct nlattr *nla)
2383 struct nftables_pernet *nft_net = nft_pernet(net);
2384 u32 id = ntohl(nla_get_be32(nla));
2385 struct nft_trans *trans;
2387 list_for_each_entry(trans, &nft_net->commit_list, list) {
2388 struct nft_chain *chain = trans->ctx.chain;
2390 if (trans->msg_type == NFT_MSG_NEWCHAIN &&
2391 id == nft_trans_chain_id(trans))
2394 return ERR_PTR(-ENOENT);
2397 static int nf_tables_newchain(struct sk_buff *skb, const struct nfnl_info *info,
2398 const struct nlattr * const nla[])
2400 struct nftables_pernet *nft_net = nft_pernet(info->net);
2401 struct netlink_ext_ack *extack = info->extack;
2402 u8 genmask = nft_genmask_next(info->net);
2403 u8 family = info->nfmsg->nfgen_family;
2404 struct nft_chain *chain = NULL;
2405 struct net *net = info->net;
2406 const struct nlattr *attr;
2407 struct nft_table *table;
2408 u8 policy = NF_ACCEPT;
2413 lockdep_assert_held(&nft_net->commit_mutex);
2415 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2416 NETLINK_CB(skb).portid);
2417 if (IS_ERR(table)) {
2418 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
2419 return PTR_ERR(table);
2423 attr = nla[NFTA_CHAIN_NAME];
2425 if (nla[NFTA_CHAIN_HANDLE]) {
2426 handle = be64_to_cpu(nla_get_be64(nla[NFTA_CHAIN_HANDLE]));
2427 chain = nft_chain_lookup_byhandle(table, handle, genmask);
2428 if (IS_ERR(chain)) {
2429 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_HANDLE]);
2430 return PTR_ERR(chain);
2432 attr = nla[NFTA_CHAIN_HANDLE];
2433 } else if (nla[NFTA_CHAIN_NAME]) {
2434 chain = nft_chain_lookup(net, table, attr, genmask);
2435 if (IS_ERR(chain)) {
2436 if (PTR_ERR(chain) != -ENOENT) {
2437 NL_SET_BAD_ATTR(extack, attr);
2438 return PTR_ERR(chain);
2442 } else if (!nla[NFTA_CHAIN_ID]) {
2446 if (nla[NFTA_CHAIN_POLICY]) {
2447 if (chain != NULL &&
2448 !nft_is_base_chain(chain)) {
2449 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
2453 if (chain == NULL &&
2454 nla[NFTA_CHAIN_HOOK] == NULL) {
2455 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_POLICY]);
2459 policy = ntohl(nla_get_be32(nla[NFTA_CHAIN_POLICY]));
2469 if (nla[NFTA_CHAIN_FLAGS])
2470 flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
2472 flags = chain->flags;
2474 if (flags & ~NFT_CHAIN_FLAGS)
2477 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2479 if (chain != NULL) {
2480 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
2481 NL_SET_BAD_ATTR(extack, attr);
2484 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
2487 flags |= chain->flags & NFT_CHAIN_BASE;
2488 return nf_tables_updchain(&ctx, genmask, policy, flags, attr,
2492 return nf_tables_addchain(&ctx, family, genmask, policy, flags, extack);
2495 static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
2496 const struct nlattr * const nla[])
2498 struct netlink_ext_ack *extack = info->extack;
2499 u8 genmask = nft_genmask_next(info->net);
2500 u8 family = info->nfmsg->nfgen_family;
2501 struct net *net = info->net;
2502 const struct nlattr *attr;
2503 struct nft_table *table;
2504 struct nft_chain *chain;
2505 struct nft_rule *rule;
2511 table = nft_table_lookup(net, nla[NFTA_CHAIN_TABLE], family, genmask,
2512 NETLINK_CB(skb).portid);
2513 if (IS_ERR(table)) {
2514 NL_SET_BAD_ATTR(extack, nla[NFTA_CHAIN_TABLE]);
2515 return PTR_ERR(table);
2518 if (nla[NFTA_CHAIN_HANDLE]) {
2519 attr = nla[NFTA_CHAIN_HANDLE];
2520 handle = be64_to_cpu(nla_get_be64(attr));
2521 chain = nft_chain_lookup_byhandle(table, handle, genmask);
2523 attr = nla[NFTA_CHAIN_NAME];
2524 chain = nft_chain_lookup(net, table, attr, genmask);
2526 if (IS_ERR(chain)) {
2527 NL_SET_BAD_ATTR(extack, attr);
2528 return PTR_ERR(chain);
2531 if (info->nlh->nlmsg_flags & NLM_F_NONREC &&
2535 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
2538 list_for_each_entry(rule, &chain->rules, list) {
2539 if (!nft_is_active_next(net, rule))
2543 err = nft_delrule(&ctx, rule);
2548 /* There are rules and elements that are still holding references to us,
2549 * we cannot do a recursive removal in this case.
2552 NL_SET_BAD_ATTR(extack, attr);
2556 return nft_delchain(&ctx);
2564 * nft_register_expr - register nf_tables expr type
2567 * Registers the expr type for use with nf_tables. Returns zero on
2568 * success or a negative errno code otherwise.
2570 int nft_register_expr(struct nft_expr_type *type)
2572 nfnl_lock(NFNL_SUBSYS_NFTABLES);
2573 if (type->family == NFPROTO_UNSPEC)
2574 list_add_tail_rcu(&type->list, &nf_tables_expressions);
2576 list_add_rcu(&type->list, &nf_tables_expressions);
2577 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2580 EXPORT_SYMBOL_GPL(nft_register_expr);
2583 * nft_unregister_expr - unregister nf_tables expr type
2586 * Unregisters the expr typefor use with nf_tables.
2588 void nft_unregister_expr(struct nft_expr_type *type)
2590 nfnl_lock(NFNL_SUBSYS_NFTABLES);
2591 list_del_rcu(&type->list);
2592 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
2594 EXPORT_SYMBOL_GPL(nft_unregister_expr);
2596 static const struct nft_expr_type *__nft_expr_type_get(u8 family,
2599 const struct nft_expr_type *type, *candidate = NULL;
2601 list_for_each_entry(type, &nf_tables_expressions, list) {
2602 if (!nla_strcmp(nla, type->name)) {
2603 if (!type->family && !candidate)
2605 else if (type->family == family)
2612 #ifdef CONFIG_MODULES
2613 static int nft_expr_type_request_module(struct net *net, u8 family,
2616 if (nft_request_module(net, "nft-expr-%u-%.*s", family,
2617 nla_len(nla), (char *)nla_data(nla)) == -EAGAIN)
2624 static const struct nft_expr_type *nft_expr_type_get(struct net *net,
2628 const struct nft_expr_type *type;
2631 return ERR_PTR(-EINVAL);
2633 type = __nft_expr_type_get(family, nla);
2634 if (type != NULL && try_module_get(type->owner))
2637 lockdep_nfnl_nft_mutex_not_held();
2638 #ifdef CONFIG_MODULES
2640 if (nft_expr_type_request_module(net, family, nla) == -EAGAIN)
2641 return ERR_PTR(-EAGAIN);
2643 if (nft_request_module(net, "nft-expr-%.*s",
2645 (char *)nla_data(nla)) == -EAGAIN)
2646 return ERR_PTR(-EAGAIN);
2649 return ERR_PTR(-ENOENT);
2652 static const struct nla_policy nft_expr_policy[NFTA_EXPR_MAX + 1] = {
2653 [NFTA_EXPR_NAME] = { .type = NLA_STRING,
2654 .len = NFT_MODULE_AUTOLOAD_LIMIT },
2655 [NFTA_EXPR_DATA] = { .type = NLA_NESTED },
2658 static int nf_tables_fill_expr_info(struct sk_buff *skb,
2659 const struct nft_expr *expr)
2661 if (nla_put_string(skb, NFTA_EXPR_NAME, expr->ops->type->name))
2662 goto nla_put_failure;
2664 if (expr->ops->dump) {
2665 struct nlattr *data = nla_nest_start_noflag(skb,
2668 goto nla_put_failure;
2669 if (expr->ops->dump(skb, expr) < 0)
2670 goto nla_put_failure;
2671 nla_nest_end(skb, data);
2680 int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
2681 const struct nft_expr *expr)
2683 struct nlattr *nest;
2685 nest = nla_nest_start_noflag(skb, attr);
2687 goto nla_put_failure;
2688 if (nf_tables_fill_expr_info(skb, expr) < 0)
2689 goto nla_put_failure;
2690 nla_nest_end(skb, nest);
2697 struct nft_expr_info {
2698 const struct nft_expr_ops *ops;
2699 const struct nlattr *attr;
2700 struct nlattr *tb[NFT_EXPR_MAXATTR + 1];
2703 static int nf_tables_expr_parse(const struct nft_ctx *ctx,
2704 const struct nlattr *nla,
2705 struct nft_expr_info *info)
2707 const struct nft_expr_type *type;
2708 const struct nft_expr_ops *ops;
2709 struct nlattr *tb[NFTA_EXPR_MAX + 1];
2712 err = nla_parse_nested_deprecated(tb, NFTA_EXPR_MAX, nla,
2713 nft_expr_policy, NULL);
2717 type = nft_expr_type_get(ctx->net, ctx->family, tb[NFTA_EXPR_NAME]);
2719 return PTR_ERR(type);
2721 if (tb[NFTA_EXPR_DATA]) {
2722 err = nla_parse_nested_deprecated(info->tb, type->maxattr,
2724 type->policy, NULL);
2728 memset(info->tb, 0, sizeof(info->tb[0]) * (type->maxattr + 1));
2730 if (type->select_ops != NULL) {
2731 ops = type->select_ops(ctx,
2732 (const struct nlattr * const *)info->tb);
2735 #ifdef CONFIG_MODULES
2737 if (nft_expr_type_request_module(ctx->net,
2739 tb[NFTA_EXPR_NAME]) != -EAGAIN)
2753 module_put(type->owner);
2757 static int nf_tables_newexpr(const struct nft_ctx *ctx,
2758 const struct nft_expr_info *expr_info,
2759 struct nft_expr *expr)
2761 const struct nft_expr_ops *ops = expr_info->ops;
2766 err = ops->init(ctx, expr, (const struct nlattr **)expr_info->tb);
2777 static void nf_tables_expr_destroy(const struct nft_ctx *ctx,
2778 struct nft_expr *expr)
2780 const struct nft_expr_type *type = expr->ops->type;
2782 if (expr->ops->destroy)
2783 expr->ops->destroy(ctx, expr);
2784 module_put(type->owner);
2787 static struct nft_expr *nft_expr_init(const struct nft_ctx *ctx,
2788 const struct nlattr *nla)
2790 struct nft_expr_info expr_info;
2791 struct nft_expr *expr;
2792 struct module *owner;
2795 err = nf_tables_expr_parse(ctx, nla, &expr_info);
2800 expr = kzalloc(expr_info.ops->size, GFP_KERNEL);
2804 err = nf_tables_newexpr(ctx, &expr_info, expr);
2812 owner = expr_info.ops->type->owner;
2813 if (expr_info.ops->type->release_ops)
2814 expr_info.ops->type->release_ops(expr_info.ops);
2818 return ERR_PTR(err);
2821 int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
2825 if (src->ops->clone) {
2826 dst->ops = src->ops;
2827 err = src->ops->clone(dst, src);
2831 memcpy(dst, src, src->ops->size);
2834 __module_get(src->ops->type->owner);
2839 void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr)
2841 nf_tables_expr_destroy(ctx, expr);
2849 static struct nft_rule *__nft_rule_lookup(const struct nft_chain *chain,
2852 struct nft_rule *rule;
2854 // FIXME: this sucks
2855 list_for_each_entry_rcu(rule, &chain->rules, list) {
2856 if (handle == rule->handle)
2860 return ERR_PTR(-ENOENT);
2863 static struct nft_rule *nft_rule_lookup(const struct nft_chain *chain,
2864 const struct nlattr *nla)
2867 return ERR_PTR(-EINVAL);
2869 return __nft_rule_lookup(chain, be64_to_cpu(nla_get_be64(nla)));
2872 static const struct nla_policy nft_rule_policy[NFTA_RULE_MAX + 1] = {
2873 [NFTA_RULE_TABLE] = { .type = NLA_STRING,
2874 .len = NFT_TABLE_MAXNAMELEN - 1 },
2875 [NFTA_RULE_CHAIN] = { .type = NLA_STRING,
2876 .len = NFT_CHAIN_MAXNAMELEN - 1 },
2877 [NFTA_RULE_HANDLE] = { .type = NLA_U64 },
2878 [NFTA_RULE_EXPRESSIONS] = { .type = NLA_NESTED },
2879 [NFTA_RULE_COMPAT] = { .type = NLA_NESTED },
2880 [NFTA_RULE_POSITION] = { .type = NLA_U64 },
2881 [NFTA_RULE_USERDATA] = { .type = NLA_BINARY,
2882 .len = NFT_USERDATA_MAXLEN },
2883 [NFTA_RULE_ID] = { .type = NLA_U32 },
2884 [NFTA_RULE_POSITION_ID] = { .type = NLA_U32 },
2885 [NFTA_RULE_CHAIN_ID] = { .type = NLA_U32 },
2888 static int nf_tables_fill_rule_info(struct sk_buff *skb, struct net *net,
2889 u32 portid, u32 seq, int event,
2890 u32 flags, int family,
2891 const struct nft_table *table,
2892 const struct nft_chain *chain,
2893 const struct nft_rule *rule, u64 handle)
2895 struct nlmsghdr *nlh;
2896 const struct nft_expr *expr, *next;
2897 struct nlattr *list;
2898 u16 type = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
2900 nlh = nfnl_msg_put(skb, portid, seq, type, flags, family, NFNETLINK_V0,
2903 goto nla_put_failure;
2905 if (nla_put_string(skb, NFTA_RULE_TABLE, table->name))
2906 goto nla_put_failure;
2907 if (nla_put_string(skb, NFTA_RULE_CHAIN, chain->name))
2908 goto nla_put_failure;
2909 if (nla_put_be64(skb, NFTA_RULE_HANDLE, cpu_to_be64(rule->handle),
2911 goto nla_put_failure;
2913 if (event != NFT_MSG_DELRULE && handle) {
2914 if (nla_put_be64(skb, NFTA_RULE_POSITION, cpu_to_be64(handle),
2916 goto nla_put_failure;
2919 if (chain->flags & NFT_CHAIN_HW_OFFLOAD)
2920 nft_flow_rule_stats(chain, rule);
2922 list = nla_nest_start_noflag(skb, NFTA_RULE_EXPRESSIONS);
2924 goto nla_put_failure;
2925 nft_rule_for_each_expr(expr, next, rule) {
2926 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
2927 goto nla_put_failure;
2929 nla_nest_end(skb, list);
2932 struct nft_userdata *udata = nft_userdata(rule);
2933 if (nla_put(skb, NFTA_RULE_USERDATA, udata->len + 1,
2935 goto nla_put_failure;
2938 nlmsg_end(skb, nlh);
2942 nlmsg_trim(skb, nlh);
2946 static void nf_tables_rule_notify(const struct nft_ctx *ctx,
2947 const struct nft_rule *rule, int event)
2949 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
2950 const struct nft_rule *prule;
2951 struct sk_buff *skb;
2957 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
2960 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2964 if (event == NFT_MSG_NEWRULE &&
2965 !list_is_first(&rule->list, &ctx->chain->rules) &&
2966 !list_is_last(&rule->list, &ctx->chain->rules)) {
2967 prule = list_prev_entry(rule, list);
2968 handle = prule->handle;
2970 if (ctx->flags & (NLM_F_APPEND | NLM_F_REPLACE))
2971 flags |= NLM_F_APPEND;
2972 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
2973 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
2975 err = nf_tables_fill_rule_info(skb, ctx->net, ctx->portid, ctx->seq,
2976 event, flags, ctx->family, ctx->table,
2977 ctx->chain, rule, handle);
2983 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
2986 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
2989 struct nft_rule_dump_ctx {
2994 static int __nf_tables_dump_rules(struct sk_buff *skb,
2996 struct netlink_callback *cb,
2997 const struct nft_table *table,
2998 const struct nft_chain *chain)
3000 struct net *net = sock_net(skb->sk);
3001 const struct nft_rule *rule, *prule;
3002 unsigned int s_idx = cb->args[0];
3006 list_for_each_entry_rcu(rule, &chain->rules, list) {
3007 if (!nft_is_active(net, rule))
3012 memset(&cb->args[1], 0,
3013 sizeof(cb->args) - sizeof(cb->args[0]));
3016 handle = prule->handle;
3020 if (nf_tables_fill_rule_info(skb, net, NETLINK_CB(cb->skb).portid,
3023 NLM_F_MULTI | NLM_F_APPEND,
3025 table, chain, rule, handle) < 0)
3028 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3037 static int nf_tables_dump_rules(struct sk_buff *skb,
3038 struct netlink_callback *cb)
3040 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
3041 const struct nft_rule_dump_ctx *ctx = cb->data;
3042 struct nft_table *table;
3043 const struct nft_chain *chain;
3044 unsigned int idx = 0;
3045 struct net *net = sock_net(skb->sk);
3046 int family = nfmsg->nfgen_family;
3047 struct nftables_pernet *nft_net;
3050 nft_net = nft_pernet(net);
3051 cb->seq = nft_net->base_seq;
3053 list_for_each_entry_rcu(table, &nft_net->tables, list) {
3054 if (family != NFPROTO_UNSPEC && family != table->family)
3057 if (ctx && ctx->table && strcmp(ctx->table, table->name) != 0)
3060 if (ctx && ctx->table && ctx->chain) {
3061 struct rhlist_head *list, *tmp;
3063 list = rhltable_lookup(&table->chains_ht, ctx->chain,
3064 nft_chain_ht_params);
3068 rhl_for_each_entry_rcu(chain, tmp, list, rhlhead) {
3069 if (!nft_is_active(net, chain))
3071 __nf_tables_dump_rules(skb, &idx,
3078 list_for_each_entry_rcu(chain, &table->chains, list) {
3079 if (__nf_tables_dump_rules(skb, &idx, cb, table, chain))
3083 if (ctx && ctx->table)
3093 static int nf_tables_dump_rules_start(struct netlink_callback *cb)
3095 const struct nlattr * const *nla = cb->data;
3096 struct nft_rule_dump_ctx *ctx = NULL;
3098 if (nla[NFTA_RULE_TABLE] || nla[NFTA_RULE_CHAIN]) {
3099 ctx = kzalloc(sizeof(*ctx), GFP_ATOMIC);
3103 if (nla[NFTA_RULE_TABLE]) {
3104 ctx->table = nla_strdup(nla[NFTA_RULE_TABLE],
3111 if (nla[NFTA_RULE_CHAIN]) {
3112 ctx->chain = nla_strdup(nla[NFTA_RULE_CHAIN],
3126 static int nf_tables_dump_rules_done(struct netlink_callback *cb)
3128 struct nft_rule_dump_ctx *ctx = cb->data;
3138 /* called with rcu_read_lock held */
3139 static int nf_tables_getrule(struct sk_buff *skb, const struct nfnl_info *info,
3140 const struct nlattr * const nla[])
3142 struct netlink_ext_ack *extack = info->extack;
3143 u8 genmask = nft_genmask_cur(info->net);
3144 u8 family = info->nfmsg->nfgen_family;
3145 const struct nft_chain *chain;
3146 const struct nft_rule *rule;
3147 struct net *net = info->net;
3148 struct nft_table *table;
3149 struct sk_buff *skb2;
3152 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
3153 struct netlink_dump_control c = {
3154 .start= nf_tables_dump_rules_start,
3155 .dump = nf_tables_dump_rules,
3156 .done = nf_tables_dump_rules_done,
3157 .module = THIS_MODULE,
3158 .data = (void *)nla,
3161 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
3164 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask, 0);
3165 if (IS_ERR(table)) {
3166 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3167 return PTR_ERR(table);
3170 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN], genmask);
3171 if (IS_ERR(chain)) {
3172 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3173 return PTR_ERR(chain);
3176 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
3178 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3179 return PTR_ERR(rule);
3182 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
3186 err = nf_tables_fill_rule_info(skb2, net, NETLINK_CB(skb).portid,
3187 info->nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
3188 family, table, chain, rule, 0);
3190 goto err_fill_rule_info;
3192 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
3199 static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
3200 struct nft_rule *rule)
3202 struct nft_expr *expr, *next;
3205 * Careful: some expressions might not be initialized in case this
3206 * is called on error from nf_tables_newrule().
3208 expr = nft_expr_first(rule);
3209 while (nft_expr_more(rule, expr)) {
3210 next = nft_expr_next(expr);
3211 nf_tables_expr_destroy(ctx, expr);
3217 void nf_tables_rule_release(const struct nft_ctx *ctx, struct nft_rule *rule)
3219 nft_rule_expr_deactivate(ctx, rule, NFT_TRANS_RELEASE);
3220 nf_tables_rule_destroy(ctx, rule);
3223 int nft_chain_validate(const struct nft_ctx *ctx, const struct nft_chain *chain)
3225 struct nft_expr *expr, *last;
3226 const struct nft_data *data;
3227 struct nft_rule *rule;
3230 if (ctx->level == NFT_JUMP_STACK_SIZE)
3233 list_for_each_entry(rule, &chain->rules, list) {
3234 if (!nft_is_active_next(ctx->net, rule))
3237 nft_rule_for_each_expr(expr, last, rule) {
3238 if (!expr->ops->validate)
3241 err = expr->ops->validate(ctx, expr, &data);
3249 EXPORT_SYMBOL_GPL(nft_chain_validate);
3251 static int nft_table_validate(struct net *net, const struct nft_table *table)
3253 struct nft_chain *chain;
3254 struct nft_ctx ctx = {
3256 .family = table->family,
3260 list_for_each_entry(chain, &table->chains, list) {
3261 if (!nft_is_base_chain(chain))
3265 err = nft_chain_validate(&ctx, chain);
3273 static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
3274 const struct nlattr *nla);
3276 #define NFT_RULE_MAXEXPRS 128
3278 static int nf_tables_newrule(struct sk_buff *skb, const struct nfnl_info *info,
3279 const struct nlattr * const nla[])
3281 struct nftables_pernet *nft_net = nft_pernet(info->net);
3282 struct netlink_ext_ack *extack = info->extack;
3283 unsigned int size, i, n, ulen = 0, usize = 0;
3284 u8 genmask = nft_genmask_next(info->net);
3285 struct nft_rule *rule, *old_rule = NULL;
3286 struct nft_expr_info *expr_info = NULL;
3287 u8 family = info->nfmsg->nfgen_family;
3288 struct nft_flow_rule *flow = NULL;
3289 struct net *net = info->net;
3290 struct nft_userdata *udata;
3291 struct nft_table *table;
3292 struct nft_chain *chain;
3293 struct nft_trans *trans;
3294 u64 handle, pos_handle;
3295 struct nft_expr *expr;
3300 lockdep_assert_held(&nft_net->commit_mutex);
3302 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3303 NETLINK_CB(skb).portid);
3304 if (IS_ERR(table)) {
3305 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3306 return PTR_ERR(table);
3309 if (nla[NFTA_RULE_CHAIN]) {
3310 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3312 if (IS_ERR(chain)) {
3313 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3314 return PTR_ERR(chain);
3316 if (nft_chain_is_bound(chain))
3319 } else if (nla[NFTA_RULE_CHAIN_ID]) {
3320 chain = nft_chain_lookup_byid(net, nla[NFTA_RULE_CHAIN_ID]);
3321 if (IS_ERR(chain)) {
3322 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN_ID]);
3323 return PTR_ERR(chain);
3329 if (nla[NFTA_RULE_HANDLE]) {
3330 handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_HANDLE]));
3331 rule = __nft_rule_lookup(chain, handle);
3333 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3334 return PTR_ERR(rule);
3337 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
3338 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3341 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
3346 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE) ||
3347 info->nlh->nlmsg_flags & NLM_F_REPLACE)
3349 handle = nf_tables_alloc_handle(table);
3351 if (chain->use == UINT_MAX)
3354 if (nla[NFTA_RULE_POSITION]) {
3355 pos_handle = be64_to_cpu(nla_get_be64(nla[NFTA_RULE_POSITION]));
3356 old_rule = __nft_rule_lookup(chain, pos_handle);
3357 if (IS_ERR(old_rule)) {
3358 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION]);
3359 return PTR_ERR(old_rule);
3361 } else if (nla[NFTA_RULE_POSITION_ID]) {
3362 old_rule = nft_rule_lookup_byid(net, nla[NFTA_RULE_POSITION_ID]);
3363 if (IS_ERR(old_rule)) {
3364 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_POSITION_ID]);
3365 return PTR_ERR(old_rule);
3370 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
3374 if (nla[NFTA_RULE_EXPRESSIONS]) {
3375 expr_info = kvmalloc_array(NFT_RULE_MAXEXPRS,
3376 sizeof(struct nft_expr_info),
3381 nla_for_each_nested(tmp, nla[NFTA_RULE_EXPRESSIONS], rem) {
3383 if (nla_type(tmp) != NFTA_LIST_ELEM)
3384 goto err_release_expr;
3385 if (n == NFT_RULE_MAXEXPRS)
3386 goto err_release_expr;
3387 err = nf_tables_expr_parse(&ctx, tmp, &expr_info[n]);
3389 NL_SET_BAD_ATTR(extack, tmp);
3390 goto err_release_expr;
3392 size += expr_info[n].ops->size;
3396 /* Check for overflow of dlen field */
3398 if (size >= 1 << 12)
3399 goto err_release_expr;
3401 if (nla[NFTA_RULE_USERDATA]) {
3402 ulen = nla_len(nla[NFTA_RULE_USERDATA]);
3404 usize = sizeof(struct nft_userdata) + ulen;
3408 rule = kzalloc(sizeof(*rule) + size + usize, GFP_KERNEL);
3410 goto err_release_expr;
3412 nft_activate_next(net, rule);
3414 rule->handle = handle;
3416 rule->udata = ulen ? 1 : 0;
3419 udata = nft_userdata(rule);
3420 udata->len = ulen - 1;
3421 nla_memcpy(udata->data, nla[NFTA_RULE_USERDATA], ulen);
3424 expr = nft_expr_first(rule);
3425 for (i = 0; i < n; i++) {
3426 err = nf_tables_newexpr(&ctx, &expr_info[i], expr);
3428 NL_SET_BAD_ATTR(extack, expr_info[i].attr);
3429 goto err_release_rule;
3432 if (expr_info[i].ops->validate)
3433 nft_validate_state_update(net, NFT_VALIDATE_NEED);
3435 expr_info[i].ops = NULL;
3436 expr = nft_expr_next(expr);
3439 if (chain->flags & NFT_CHAIN_HW_OFFLOAD) {
3440 flow = nft_flow_rule_create(net, rule);
3442 err = PTR_ERR(flow);
3443 goto err_release_rule;
3447 if (info->nlh->nlmsg_flags & NLM_F_REPLACE) {
3448 err = nft_delrule(&ctx, old_rule);
3450 goto err_destroy_flow_rule;
3452 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3453 if (trans == NULL) {
3455 goto err_destroy_flow_rule;
3457 list_add_tail_rcu(&rule->list, &old_rule->list);
3459 trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE, rule);
3462 goto err_destroy_flow_rule;
3465 if (info->nlh->nlmsg_flags & NLM_F_APPEND) {
3467 list_add_rcu(&rule->list, &old_rule->list);
3469 list_add_tail_rcu(&rule->list, &chain->rules);
3472 list_add_tail_rcu(&rule->list, &old_rule->list);
3474 list_add_rcu(&rule->list, &chain->rules);
3481 nft_trans_flow_rule(trans) = flow;
3483 if (nft_net->validate_state == NFT_VALIDATE_DO)
3484 return nft_table_validate(net, table);
3488 err_destroy_flow_rule:
3490 nft_flow_rule_destroy(flow);
3492 nf_tables_rule_release(&ctx, rule);
3494 for (i = 0; i < n; i++) {
3495 if (expr_info[i].ops) {
3496 module_put(expr_info[i].ops->type->owner);
3497 if (expr_info[i].ops->type->release_ops)
3498 expr_info[i].ops->type->release_ops(expr_info[i].ops);
3506 static struct nft_rule *nft_rule_lookup_byid(const struct net *net,
3507 const struct nlattr *nla)
3509 struct nftables_pernet *nft_net = nft_pernet(net);
3510 u32 id = ntohl(nla_get_be32(nla));
3511 struct nft_trans *trans;
3513 list_for_each_entry(trans, &nft_net->commit_list, list) {
3514 struct nft_rule *rule = nft_trans_rule(trans);
3516 if (trans->msg_type == NFT_MSG_NEWRULE &&
3517 id == nft_trans_rule_id(trans))
3520 return ERR_PTR(-ENOENT);
3523 static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
3524 const struct nlattr * const nla[])
3526 struct netlink_ext_ack *extack = info->extack;
3527 u8 genmask = nft_genmask_next(info->net);
3528 u8 family = info->nfmsg->nfgen_family;
3529 struct nft_chain *chain = NULL;
3530 struct net *net = info->net;
3531 struct nft_table *table;
3532 struct nft_rule *rule;
3536 table = nft_table_lookup(net, nla[NFTA_RULE_TABLE], family, genmask,
3537 NETLINK_CB(skb).portid);
3538 if (IS_ERR(table)) {
3539 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_TABLE]);
3540 return PTR_ERR(table);
3543 if (nla[NFTA_RULE_CHAIN]) {
3544 chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
3546 if (IS_ERR(chain)) {
3547 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
3548 return PTR_ERR(chain);
3550 if (nft_chain_is_bound(chain))
3554 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, chain, nla);
3557 if (nla[NFTA_RULE_HANDLE]) {
3558 rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
3560 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
3561 return PTR_ERR(rule);
3564 err = nft_delrule(&ctx, rule);
3565 } else if (nla[NFTA_RULE_ID]) {
3566 rule = nft_rule_lookup_byid(net, nla[NFTA_RULE_ID]);
3568 NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_ID]);
3569 return PTR_ERR(rule);
3572 err = nft_delrule(&ctx, rule);
3574 err = nft_delrule_by_chain(&ctx);
3577 list_for_each_entry(chain, &table->chains, list) {
3578 if (!nft_is_active_next(net, chain))
3582 err = nft_delrule_by_chain(&ctx);
3594 static const struct nft_set_type *nft_set_types[] = {
3595 &nft_set_hash_fast_type,
3597 &nft_set_rhash_type,
3598 &nft_set_bitmap_type,
3599 &nft_set_rbtree_type,
3600 #if defined(CONFIG_X86_64) && !defined(CONFIG_UML)
3601 &nft_set_pipapo_avx2_type,
3603 &nft_set_pipapo_type,
3606 #define NFT_SET_FEATURES (NFT_SET_INTERVAL | NFT_SET_MAP | \
3607 NFT_SET_TIMEOUT | NFT_SET_OBJECT | \
3610 static bool nft_set_ops_candidate(const struct nft_set_type *type, u32 flags)
3612 return (flags & type->features) == (flags & NFT_SET_FEATURES);
3616 * Select a set implementation based on the data characteristics and the
3617 * given policy. The total memory use might not be known if no size is
3618 * given, in that case the amount of memory per element is used.
3620 static const struct nft_set_ops *
3621 nft_select_set_ops(const struct nft_ctx *ctx,
3622 const struct nlattr * const nla[],
3623 const struct nft_set_desc *desc,
3624 enum nft_set_policies policy)
3626 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3627 const struct nft_set_ops *ops, *bops;
3628 struct nft_set_estimate est, best;
3629 const struct nft_set_type *type;
3633 lockdep_assert_held(&nft_net->commit_mutex);
3634 lockdep_nfnl_nft_mutex_not_held();
3636 if (nla[NFTA_SET_FLAGS] != NULL)
3637 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
3644 for (i = 0; i < ARRAY_SIZE(nft_set_types); i++) {
3645 type = nft_set_types[i];
3648 if (!nft_set_ops_candidate(type, flags))
3650 if (!ops->estimate(desc, flags, &est))
3654 case NFT_SET_POL_PERFORMANCE:
3655 if (est.lookup < best.lookup)
3657 if (est.lookup == best.lookup &&
3658 est.space < best.space)
3661 case NFT_SET_POL_MEMORY:
3663 if (est.space < best.space)
3665 if (est.space == best.space &&
3666 est.lookup < best.lookup)
3668 } else if (est.size < best.size || !bops) {
3683 return ERR_PTR(-EOPNOTSUPP);
3686 static const struct nla_policy nft_set_policy[NFTA_SET_MAX + 1] = {
3687 [NFTA_SET_TABLE] = { .type = NLA_STRING,
3688 .len = NFT_TABLE_MAXNAMELEN - 1 },
3689 [NFTA_SET_NAME] = { .type = NLA_STRING,
3690 .len = NFT_SET_MAXNAMELEN - 1 },
3691 [NFTA_SET_FLAGS] = { .type = NLA_U32 },
3692 [NFTA_SET_KEY_TYPE] = { .type = NLA_U32 },
3693 [NFTA_SET_KEY_LEN] = { .type = NLA_U32 },
3694 [NFTA_SET_DATA_TYPE] = { .type = NLA_U32 },
3695 [NFTA_SET_DATA_LEN] = { .type = NLA_U32 },
3696 [NFTA_SET_POLICY] = { .type = NLA_U32 },
3697 [NFTA_SET_DESC] = { .type = NLA_NESTED },
3698 [NFTA_SET_ID] = { .type = NLA_U32 },
3699 [NFTA_SET_TIMEOUT] = { .type = NLA_U64 },
3700 [NFTA_SET_GC_INTERVAL] = { .type = NLA_U32 },
3701 [NFTA_SET_USERDATA] = { .type = NLA_BINARY,
3702 .len = NFT_USERDATA_MAXLEN },
3703 [NFTA_SET_OBJ_TYPE] = { .type = NLA_U32 },
3704 [NFTA_SET_HANDLE] = { .type = NLA_U64 },
3705 [NFTA_SET_EXPR] = { .type = NLA_NESTED },
3706 [NFTA_SET_EXPRESSIONS] = { .type = NLA_NESTED },
3709 static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
3710 [NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
3711 [NFTA_SET_DESC_CONCAT] = { .type = NLA_NESTED },
3714 static struct nft_set *nft_set_lookup(const struct nft_table *table,
3715 const struct nlattr *nla, u8 genmask)
3717 struct nft_set *set;
3720 return ERR_PTR(-EINVAL);
3722 list_for_each_entry_rcu(set, &table->sets, list) {
3723 if (!nla_strcmp(nla, set->name) &&
3724 nft_active_genmask(set, genmask))
3727 return ERR_PTR(-ENOENT);
3730 static struct nft_set *nft_set_lookup_byhandle(const struct nft_table *table,
3731 const struct nlattr *nla,
3734 struct nft_set *set;
3736 list_for_each_entry(set, &table->sets, list) {
3737 if (be64_to_cpu(nla_get_be64(nla)) == set->handle &&
3738 nft_active_genmask(set, genmask))
3741 return ERR_PTR(-ENOENT);
3744 static struct nft_set *nft_set_lookup_byid(const struct net *net,
3745 const struct nlattr *nla, u8 genmask)
3747 struct nftables_pernet *nft_net = nft_pernet(net);
3748 u32 id = ntohl(nla_get_be32(nla));
3749 struct nft_trans *trans;
3751 list_for_each_entry(trans, &nft_net->commit_list, list) {
3752 if (trans->msg_type == NFT_MSG_NEWSET) {
3753 struct nft_set *set = nft_trans_set(trans);
3755 if (id == nft_trans_set_id(trans) &&
3756 nft_active_genmask(set, genmask))
3760 return ERR_PTR(-ENOENT);
3763 struct nft_set *nft_set_lookup_global(const struct net *net,
3764 const struct nft_table *table,
3765 const struct nlattr *nla_set_name,
3766 const struct nlattr *nla_set_id,
3769 struct nft_set *set;
3771 set = nft_set_lookup(table, nla_set_name, genmask);
3776 set = nft_set_lookup_byid(net, nla_set_id, genmask);
3780 EXPORT_SYMBOL_GPL(nft_set_lookup_global);
3782 static int nf_tables_set_alloc_name(struct nft_ctx *ctx, struct nft_set *set,
3785 const struct nft_set *i;
3787 unsigned long *inuse;
3788 unsigned int n = 0, min = 0;
3790 p = strchr(name, '%');
3792 if (p[1] != 'd' || strchr(p + 2, '%'))
3795 inuse = (unsigned long *)get_zeroed_page(GFP_KERNEL);
3799 list_for_each_entry(i, &ctx->table->sets, list) {
3802 if (!nft_is_active_next(ctx->net, set))
3804 if (!sscanf(i->name, name, &tmp))
3806 if (tmp < min || tmp >= min + BITS_PER_BYTE * PAGE_SIZE)
3809 set_bit(tmp - min, inuse);
3812 n = find_first_zero_bit(inuse, BITS_PER_BYTE * PAGE_SIZE);
3813 if (n >= BITS_PER_BYTE * PAGE_SIZE) {
3814 min += BITS_PER_BYTE * PAGE_SIZE;
3815 memset(inuse, 0, PAGE_SIZE);
3818 free_page((unsigned long)inuse);
3821 set->name = kasprintf(GFP_KERNEL, name, min + n);
3825 list_for_each_entry(i, &ctx->table->sets, list) {
3826 if (!nft_is_active_next(ctx->net, i))
3828 if (!strcmp(set->name, i->name)) {
3837 int nf_msecs_to_jiffies64(const struct nlattr *nla, u64 *result)
3839 u64 ms = be64_to_cpu(nla_get_be64(nla));
3840 u64 max = (u64)(~((u64)0));
3842 max = div_u64(max, NSEC_PER_MSEC);
3846 ms *= NSEC_PER_MSEC;
3847 *result = nsecs_to_jiffies64(ms);
3851 __be64 nf_jiffies64_to_msecs(u64 input)
3853 return cpu_to_be64(jiffies64_to_msecs(input));
3856 static int nf_tables_fill_set_concat(struct sk_buff *skb,
3857 const struct nft_set *set)
3859 struct nlattr *concat, *field;
3862 concat = nla_nest_start_noflag(skb, NFTA_SET_DESC_CONCAT);
3866 for (i = 0; i < set->field_count; i++) {
3867 field = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
3871 if (nla_put_be32(skb, NFTA_SET_FIELD_LEN,
3872 htonl(set->field_len[i])))
3875 nla_nest_end(skb, field);
3878 nla_nest_end(skb, concat);
3883 static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
3884 const struct nft_set *set, u16 event, u16 flags)
3886 struct nlmsghdr *nlh;
3887 u32 portid = ctx->portid;
3888 struct nlattr *nest;
3892 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
3893 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
3894 NFNETLINK_V0, nft_base_seq(ctx->net));
3896 goto nla_put_failure;
3898 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
3899 goto nla_put_failure;
3900 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
3901 goto nla_put_failure;
3902 if (nla_put_be64(skb, NFTA_SET_HANDLE, cpu_to_be64(set->handle),
3904 goto nla_put_failure;
3905 if (set->flags != 0)
3906 if (nla_put_be32(skb, NFTA_SET_FLAGS, htonl(set->flags)))
3907 goto nla_put_failure;
3909 if (nla_put_be32(skb, NFTA_SET_KEY_TYPE, htonl(set->ktype)))
3910 goto nla_put_failure;
3911 if (nla_put_be32(skb, NFTA_SET_KEY_LEN, htonl(set->klen)))
3912 goto nla_put_failure;
3913 if (set->flags & NFT_SET_MAP) {
3914 if (nla_put_be32(skb, NFTA_SET_DATA_TYPE, htonl(set->dtype)))
3915 goto nla_put_failure;
3916 if (nla_put_be32(skb, NFTA_SET_DATA_LEN, htonl(set->dlen)))
3917 goto nla_put_failure;
3919 if (set->flags & NFT_SET_OBJECT &&
3920 nla_put_be32(skb, NFTA_SET_OBJ_TYPE, htonl(set->objtype)))
3921 goto nla_put_failure;
3924 nla_put_be64(skb, NFTA_SET_TIMEOUT,
3925 nf_jiffies64_to_msecs(set->timeout),
3927 goto nla_put_failure;
3929 nla_put_be32(skb, NFTA_SET_GC_INTERVAL, htonl(set->gc_int)))
3930 goto nla_put_failure;
3932 if (set->policy != NFT_SET_POL_PERFORMANCE) {
3933 if (nla_put_be32(skb, NFTA_SET_POLICY, htonl(set->policy)))
3934 goto nla_put_failure;
3938 nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
3939 goto nla_put_failure;
3941 nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
3943 goto nla_put_failure;
3945 nla_put_be32(skb, NFTA_SET_DESC_SIZE, htonl(set->size)))
3946 goto nla_put_failure;
3948 if (set->field_count > 1 &&
3949 nf_tables_fill_set_concat(skb, set))
3950 goto nla_put_failure;
3952 nla_nest_end(skb, nest);
3954 if (set->num_exprs == 1) {
3955 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPR);
3956 if (nf_tables_fill_expr_info(skb, set->exprs[0]) < 0)
3957 goto nla_put_failure;
3959 nla_nest_end(skb, nest);
3960 } else if (set->num_exprs > 1) {
3961 nest = nla_nest_start_noflag(skb, NFTA_SET_EXPRESSIONS);
3963 goto nla_put_failure;
3965 for (i = 0; i < set->num_exprs; i++) {
3966 if (nft_expr_dump(skb, NFTA_LIST_ELEM,
3968 goto nla_put_failure;
3970 nla_nest_end(skb, nest);
3973 nlmsg_end(skb, nlh);
3977 nlmsg_trim(skb, nlh);
3981 static void nf_tables_set_notify(const struct nft_ctx *ctx,
3982 const struct nft_set *set, int event,
3985 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
3986 u32 portid = ctx->portid;
3987 struct sk_buff *skb;
3992 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
3995 skb = nlmsg_new(NLMSG_GOODSIZE, gfp_flags);
3999 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
4000 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
4002 err = nf_tables_fill_set(skb, ctx, set, event, flags);
4008 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
4011 nfnetlink_set_err(ctx->net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
4014 static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
4016 const struct nft_set *set;
4017 unsigned int idx, s_idx = cb->args[0];
4018 struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
4019 struct net *net = sock_net(skb->sk);
4020 struct nft_ctx *ctx = cb->data, ctx_set;
4021 struct nftables_pernet *nft_net;
4027 nft_net = nft_pernet(net);
4028 cb->seq = nft_net->base_seq;
4030 list_for_each_entry_rcu(table, &nft_net->tables, list) {
4031 if (ctx->family != NFPROTO_UNSPEC &&
4032 ctx->family != table->family)
4035 if (ctx->table && ctx->table != table)
4039 if (cur_table != table)
4045 list_for_each_entry_rcu(set, &table->sets, list) {
4048 if (!nft_is_active(net, set))
4052 ctx_set.table = table;
4053 ctx_set.family = table->family;
4055 if (nf_tables_fill_set(skb, &ctx_set, set,
4059 cb->args[2] = (unsigned long) table;
4062 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4075 static int nf_tables_dump_sets_start(struct netlink_callback *cb)
4077 struct nft_ctx *ctx_dump = NULL;
4079 ctx_dump = kmemdup(cb->data, sizeof(*ctx_dump), GFP_ATOMIC);
4080 if (ctx_dump == NULL)
4083 cb->data = ctx_dump;
4087 static int nf_tables_dump_sets_done(struct netlink_callback *cb)
4093 /* called with rcu_read_lock held */
4094 static int nf_tables_getset(struct sk_buff *skb, const struct nfnl_info *info,
4095 const struct nlattr * const nla[])
4097 struct netlink_ext_ack *extack = info->extack;
4098 u8 genmask = nft_genmask_cur(info->net);
4099 u8 family = info->nfmsg->nfgen_family;
4100 struct nft_table *table = NULL;
4101 struct net *net = info->net;
4102 const struct nft_set *set;
4103 struct sk_buff *skb2;
4107 if (nla[NFTA_SET_TABLE]) {
4108 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4110 if (IS_ERR(table)) {
4111 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4112 return PTR_ERR(table);
4116 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4118 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
4119 struct netlink_dump_control c = {
4120 .start = nf_tables_dump_sets_start,
4121 .dump = nf_tables_dump_sets,
4122 .done = nf_tables_dump_sets_done,
4124 .module = THIS_MODULE,
4127 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
4130 /* Only accept unspec with dump */
4131 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
4132 return -EAFNOSUPPORT;
4133 if (!nla[NFTA_SET_TABLE])
4136 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
4138 return PTR_ERR(set);
4140 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
4144 err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
4146 goto err_fill_set_info;
4148 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
4155 static const struct nla_policy nft_concat_policy[NFTA_SET_FIELD_MAX + 1] = {
4156 [NFTA_SET_FIELD_LEN] = { .type = NLA_U32 },
4159 static int nft_set_desc_concat_parse(const struct nlattr *attr,
4160 struct nft_set_desc *desc)
4162 struct nlattr *tb[NFTA_SET_FIELD_MAX + 1];
4166 err = nla_parse_nested_deprecated(tb, NFTA_SET_FIELD_MAX, attr,
4167 nft_concat_policy, NULL);
4171 if (!tb[NFTA_SET_FIELD_LEN])
4174 len = ntohl(nla_get_be32(tb[NFTA_SET_FIELD_LEN]));
4176 if (len * BITS_PER_BYTE / 32 > NFT_REG32_COUNT)
4179 desc->field_len[desc->field_count++] = len;
4184 static int nft_set_desc_concat(struct nft_set_desc *desc,
4185 const struct nlattr *nla)
4187 struct nlattr *attr;
4190 nla_for_each_nested(attr, nla, rem) {
4191 if (nla_type(attr) != NFTA_LIST_ELEM)
4194 err = nft_set_desc_concat_parse(attr, desc);
4202 static int nf_tables_set_desc_parse(struct nft_set_desc *desc,
4203 const struct nlattr *nla)
4205 struct nlattr *da[NFTA_SET_DESC_MAX + 1];
4208 err = nla_parse_nested_deprecated(da, NFTA_SET_DESC_MAX, nla,
4209 nft_set_desc_policy, NULL);
4213 if (da[NFTA_SET_DESC_SIZE] != NULL)
4214 desc->size = ntohl(nla_get_be32(da[NFTA_SET_DESC_SIZE]));
4215 if (da[NFTA_SET_DESC_CONCAT])
4216 err = nft_set_desc_concat(desc, da[NFTA_SET_DESC_CONCAT]);
4221 static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
4222 const struct nlattr * const nla[])
4224 u32 ktype, dtype, flags, policy, gc_int, objtype;
4225 struct netlink_ext_ack *extack = info->extack;
4226 u8 genmask = nft_genmask_next(info->net);
4227 u8 family = info->nfmsg->nfgen_family;
4228 const struct nft_set_ops *ops;
4229 struct nft_expr *expr = NULL;
4230 struct net *net = info->net;
4231 struct nft_set_desc desc;
4232 struct nft_table *table;
4233 unsigned char *udata;
4234 struct nft_set *set;
4243 if (nla[NFTA_SET_TABLE] == NULL ||
4244 nla[NFTA_SET_NAME] == NULL ||
4245 nla[NFTA_SET_KEY_LEN] == NULL ||
4246 nla[NFTA_SET_ID] == NULL)
4249 memset(&desc, 0, sizeof(desc));
4251 ktype = NFT_DATA_VALUE;
4252 if (nla[NFTA_SET_KEY_TYPE] != NULL) {
4253 ktype = ntohl(nla_get_be32(nla[NFTA_SET_KEY_TYPE]));
4254 if ((ktype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK)
4258 desc.klen = ntohl(nla_get_be32(nla[NFTA_SET_KEY_LEN]));
4259 if (desc.klen == 0 || desc.klen > NFT_DATA_VALUE_MAXLEN)
4263 if (nla[NFTA_SET_FLAGS] != NULL) {
4264 flags = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
4265 if (flags & ~(NFT_SET_ANONYMOUS | NFT_SET_CONSTANT |
4266 NFT_SET_INTERVAL | NFT_SET_TIMEOUT |
4267 NFT_SET_MAP | NFT_SET_EVAL |
4268 NFT_SET_OBJECT | NFT_SET_CONCAT | NFT_SET_EXPR))
4270 /* Only one of these operations is supported */
4271 if ((flags & (NFT_SET_MAP | NFT_SET_OBJECT)) ==
4272 (NFT_SET_MAP | NFT_SET_OBJECT))
4274 if ((flags & (NFT_SET_EVAL | NFT_SET_OBJECT)) ==
4275 (NFT_SET_EVAL | NFT_SET_OBJECT))
4280 if (nla[NFTA_SET_DATA_TYPE] != NULL) {
4281 if (!(flags & NFT_SET_MAP))
4284 dtype = ntohl(nla_get_be32(nla[NFTA_SET_DATA_TYPE]));
4285 if ((dtype & NFT_DATA_RESERVED_MASK) == NFT_DATA_RESERVED_MASK &&
4286 dtype != NFT_DATA_VERDICT)
4289 if (dtype != NFT_DATA_VERDICT) {
4290 if (nla[NFTA_SET_DATA_LEN] == NULL)
4292 desc.dlen = ntohl(nla_get_be32(nla[NFTA_SET_DATA_LEN]));
4293 if (desc.dlen == 0 || desc.dlen > NFT_DATA_VALUE_MAXLEN)
4296 desc.dlen = sizeof(struct nft_verdict);
4297 } else if (flags & NFT_SET_MAP)
4300 if (nla[NFTA_SET_OBJ_TYPE] != NULL) {
4301 if (!(flags & NFT_SET_OBJECT))
4304 objtype = ntohl(nla_get_be32(nla[NFTA_SET_OBJ_TYPE]));
4305 if (objtype == NFT_OBJECT_UNSPEC ||
4306 objtype > NFT_OBJECT_MAX)
4308 } else if (flags & NFT_SET_OBJECT)
4311 objtype = NFT_OBJECT_UNSPEC;
4314 if (nla[NFTA_SET_TIMEOUT] != NULL) {
4315 if (!(flags & NFT_SET_TIMEOUT))
4318 err = nf_msecs_to_jiffies64(nla[NFTA_SET_TIMEOUT], &timeout);
4323 if (nla[NFTA_SET_GC_INTERVAL] != NULL) {
4324 if (!(flags & NFT_SET_TIMEOUT))
4326 gc_int = ntohl(nla_get_be32(nla[NFTA_SET_GC_INTERVAL]));
4329 policy = NFT_SET_POL_PERFORMANCE;
4330 if (nla[NFTA_SET_POLICY] != NULL)
4331 policy = ntohl(nla_get_be32(nla[NFTA_SET_POLICY]));
4333 if (nla[NFTA_SET_DESC] != NULL) {
4334 err = nf_tables_set_desc_parse(&desc, nla[NFTA_SET_DESC]);
4339 if (nla[NFTA_SET_EXPR] || nla[NFTA_SET_EXPRESSIONS])
4342 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family, genmask,
4343 NETLINK_CB(skb).portid);
4344 if (IS_ERR(table)) {
4345 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4346 return PTR_ERR(table);
4349 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4351 set = nft_set_lookup(table, nla[NFTA_SET_NAME], genmask);
4353 if (PTR_ERR(set) != -ENOENT) {
4354 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4355 return PTR_ERR(set);
4358 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
4359 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_NAME]);
4362 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
4368 if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
4371 ops = nft_select_set_ops(&ctx, nla, &desc, policy);
4373 return PTR_ERR(ops);
4376 if (nla[NFTA_SET_USERDATA])
4377 udlen = nla_len(nla[NFTA_SET_USERDATA]);
4380 if (ops->privsize != NULL)
4381 size = ops->privsize(nla, &desc);
4382 alloc_size = sizeof(*set) + size + udlen;
4383 if (alloc_size < size || alloc_size > INT_MAX)
4385 set = kvzalloc(alloc_size, GFP_KERNEL);
4389 name = nla_strdup(nla[NFTA_SET_NAME], GFP_KERNEL);
4395 err = nf_tables_set_alloc_name(&ctx, set, name);
4402 udata = set->data + size;
4403 nla_memcpy(udata, nla[NFTA_SET_USERDATA], udlen);
4406 INIT_LIST_HEAD(&set->bindings);
4407 INIT_LIST_HEAD(&set->catchall_list);
4409 write_pnet(&set->net, net);
4412 set->klen = desc.klen;
4414 set->objtype = objtype;
4415 set->dlen = desc.dlen;
4417 set->size = desc.size;
4418 set->policy = policy;
4421 set->timeout = timeout;
4422 set->gc_int = gc_int;
4424 set->field_count = desc.field_count;
4425 for (i = 0; i < desc.field_count; i++)
4426 set->field_len[i] = desc.field_len[i];
4428 err = ops->init(set, &desc, nla);
4432 if (nla[NFTA_SET_EXPR]) {
4433 expr = nft_set_elem_expr_alloc(&ctx, set, nla[NFTA_SET_EXPR]);
4435 err = PTR_ERR(expr);
4436 goto err_set_expr_alloc;
4438 set->exprs[0] = expr;
4440 } else if (nla[NFTA_SET_EXPRESSIONS]) {
4441 struct nft_expr *expr;
4445 if (!(flags & NFT_SET_EXPR)) {
4447 goto err_set_expr_alloc;
4450 nla_for_each_nested(tmp, nla[NFTA_SET_EXPRESSIONS], left) {
4451 if (i == NFT_SET_EXPR_MAX) {
4453 goto err_set_expr_alloc;
4455 if (nla_type(tmp) != NFTA_LIST_ELEM) {
4457 goto err_set_expr_alloc;
4459 expr = nft_set_elem_expr_alloc(&ctx, set, tmp);
4461 err = PTR_ERR(expr);
4462 goto err_set_expr_alloc;
4464 set->exprs[i++] = expr;
4469 set->handle = nf_tables_alloc_handle(table);
4471 err = nft_trans_set_add(&ctx, NFT_MSG_NEWSET, set);
4473 goto err_set_expr_alloc;
4475 list_add_tail_rcu(&set->list, &table->sets);
4480 for (i = 0; i < set->num_exprs; i++)
4481 nft_expr_destroy(&ctx, set->exprs[i]);
4491 struct nft_set_elem_catchall {
4492 struct list_head list;
4493 struct rcu_head rcu;
4497 static void nft_set_catchall_destroy(const struct nft_ctx *ctx,
4498 struct nft_set *set)
4500 struct nft_set_elem_catchall *next, *catchall;
4502 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
4503 list_del_rcu(&catchall->list);
4504 nft_set_elem_destroy(set, catchall->elem, true);
4505 kfree_rcu(catchall, rcu);
4509 static void nft_set_destroy(const struct nft_ctx *ctx, struct nft_set *set)
4513 if (WARN_ON(set->use > 0))
4516 for (i = 0; i < set->num_exprs; i++)
4517 nft_expr_destroy(ctx, set->exprs[i]);
4519 set->ops->destroy(set);
4520 nft_set_catchall_destroy(ctx, set);
4525 static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
4526 const struct nlattr * const nla[])
4528 struct netlink_ext_ack *extack = info->extack;
4529 u8 genmask = nft_genmask_next(info->net);
4530 u8 family = info->nfmsg->nfgen_family;
4531 struct net *net = info->net;
4532 const struct nlattr *attr;
4533 struct nft_table *table;
4534 struct nft_set *set;
4537 if (info->nfmsg->nfgen_family == NFPROTO_UNSPEC)
4538 return -EAFNOSUPPORT;
4540 table = nft_table_lookup(net, nla[NFTA_SET_TABLE], family,
4541 genmask, NETLINK_CB(skb).portid);
4542 if (IS_ERR(table)) {
4543 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_TABLE]);
4544 return PTR_ERR(table);
4547 if (nla[NFTA_SET_HANDLE]) {
4548 attr = nla[NFTA_SET_HANDLE];
4549 set = nft_set_lookup_byhandle(table, attr, genmask);
4551 attr = nla[NFTA_SET_NAME];
4552 set = nft_set_lookup(table, attr, genmask);
4556 NL_SET_BAD_ATTR(extack, attr);
4557 return PTR_ERR(set);
4560 (info->nlh->nlmsg_flags & NLM_F_NONREC &&
4561 atomic_read(&set->nelems) > 0)) {
4562 NL_SET_BAD_ATTR(extack, attr);
4566 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
4568 return nft_delset(&ctx, set);
4571 static int nft_validate_register_store(const struct nft_ctx *ctx,
4572 enum nft_registers reg,
4573 const struct nft_data *data,
4574 enum nft_data_types type,
4577 static int nft_setelem_data_validate(const struct nft_ctx *ctx,
4578 struct nft_set *set,
4579 struct nft_set_elem *elem)
4581 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
4582 enum nft_registers dreg;
4584 dreg = nft_type_to_reg(set->dtype);
4585 return nft_validate_register_store(ctx, dreg, nft_set_ext_data(ext),
4586 set->dtype == NFT_DATA_VERDICT ?
4587 NFT_DATA_VERDICT : NFT_DATA_VALUE,
4591 static int nf_tables_bind_check_setelem(const struct nft_ctx *ctx,
4592 struct nft_set *set,
4593 const struct nft_set_iter *iter,
4594 struct nft_set_elem *elem)
4596 return nft_setelem_data_validate(ctx, set, elem);
4599 static int nft_set_catchall_bind_check(const struct nft_ctx *ctx,
4600 struct nft_set *set)
4602 u8 genmask = nft_genmask_next(ctx->net);
4603 struct nft_set_elem_catchall *catchall;
4604 struct nft_set_elem elem;
4605 struct nft_set_ext *ext;
4608 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
4609 ext = nft_set_elem_ext(set, catchall->elem);
4610 if (!nft_set_elem_active(ext, genmask))
4613 elem.priv = catchall->elem;
4614 ret = nft_setelem_data_validate(ctx, set, &elem);
4622 int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set,
4623 struct nft_set_binding *binding)
4625 struct nft_set_binding *i;
4626 struct nft_set_iter iter;
4628 if (set->use == UINT_MAX)
4631 if (!list_empty(&set->bindings) && nft_set_is_anonymous(set))
4634 if (binding->flags & NFT_SET_MAP) {
4635 /* If the set is already bound to the same chain all
4636 * jumps are already validated for that chain.
4638 list_for_each_entry(i, &set->bindings, list) {
4639 if (i->flags & NFT_SET_MAP &&
4640 i->chain == binding->chain)
4644 iter.genmask = nft_genmask_next(ctx->net);
4648 iter.fn = nf_tables_bind_check_setelem;
4650 set->ops->walk(ctx, set, &iter);
4652 iter.err = nft_set_catchall_bind_check(ctx, set);
4658 binding->chain = ctx->chain;
4659 list_add_tail_rcu(&binding->list, &set->bindings);
4660 nft_set_trans_bind(ctx, set);
4665 EXPORT_SYMBOL_GPL(nf_tables_bind_set);
4667 static void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set,
4668 struct nft_set_binding *binding, bool event)
4670 list_del_rcu(&binding->list);
4672 if (list_empty(&set->bindings) && nft_set_is_anonymous(set)) {
4673 list_del_rcu(&set->list);
4675 nf_tables_set_notify(ctx, set, NFT_MSG_DELSET,
4680 void nf_tables_deactivate_set(const struct nft_ctx *ctx, struct nft_set *set,
4681 struct nft_set_binding *binding,
4682 enum nft_trans_phase phase)
4685 case NFT_TRANS_PREPARE:
4688 case NFT_TRANS_ABORT:
4689 case NFT_TRANS_RELEASE:
4693 nf_tables_unbind_set(ctx, set, binding,
4694 phase == NFT_TRANS_COMMIT);
4697 EXPORT_SYMBOL_GPL(nf_tables_deactivate_set);
4699 void nf_tables_destroy_set(const struct nft_ctx *ctx, struct nft_set *set)
4701 if (list_empty(&set->bindings) && nft_set_is_anonymous(set))
4702 nft_set_destroy(ctx, set);
4704 EXPORT_SYMBOL_GPL(nf_tables_destroy_set);
4706 const struct nft_set_ext_type nft_set_ext_types[] = {
4707 [NFT_SET_EXT_KEY] = {
4708 .align = __alignof__(u32),
4710 [NFT_SET_EXT_DATA] = {
4711 .align = __alignof__(u32),
4713 [NFT_SET_EXT_EXPRESSIONS] = {
4714 .align = __alignof__(struct nft_set_elem_expr),
4716 [NFT_SET_EXT_OBJREF] = {
4717 .len = sizeof(struct nft_object *),
4718 .align = __alignof__(struct nft_object *),
4720 [NFT_SET_EXT_FLAGS] = {
4722 .align = __alignof__(u8),
4724 [NFT_SET_EXT_TIMEOUT] = {
4726 .align = __alignof__(u64),
4728 [NFT_SET_EXT_EXPIRATION] = {
4730 .align = __alignof__(u64),
4732 [NFT_SET_EXT_USERDATA] = {
4733 .len = sizeof(struct nft_userdata),
4734 .align = __alignof__(struct nft_userdata),
4736 [NFT_SET_EXT_KEY_END] = {
4737 .align = __alignof__(u32),
4745 static const struct nla_policy nft_set_elem_policy[NFTA_SET_ELEM_MAX + 1] = {
4746 [NFTA_SET_ELEM_KEY] = { .type = NLA_NESTED },
4747 [NFTA_SET_ELEM_DATA] = { .type = NLA_NESTED },
4748 [NFTA_SET_ELEM_FLAGS] = { .type = NLA_U32 },
4749 [NFTA_SET_ELEM_TIMEOUT] = { .type = NLA_U64 },
4750 [NFTA_SET_ELEM_EXPIRATION] = { .type = NLA_U64 },
4751 [NFTA_SET_ELEM_USERDATA] = { .type = NLA_BINARY,
4752 .len = NFT_USERDATA_MAXLEN },
4753 [NFTA_SET_ELEM_EXPR] = { .type = NLA_NESTED },
4754 [NFTA_SET_ELEM_OBJREF] = { .type = NLA_STRING,
4755 .len = NFT_OBJ_MAXNAMELEN - 1 },
4756 [NFTA_SET_ELEM_KEY_END] = { .type = NLA_NESTED },
4757 [NFTA_SET_ELEM_EXPRESSIONS] = { .type = NLA_NESTED },
4760 static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX + 1] = {
4761 [NFTA_SET_ELEM_LIST_TABLE] = { .type = NLA_STRING,
4762 .len = NFT_TABLE_MAXNAMELEN - 1 },
4763 [NFTA_SET_ELEM_LIST_SET] = { .type = NLA_STRING,
4764 .len = NFT_SET_MAXNAMELEN - 1 },
4765 [NFTA_SET_ELEM_LIST_ELEMENTS] = { .type = NLA_NESTED },
4766 [NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
4769 static int nft_set_elem_expr_dump(struct sk_buff *skb,
4770 const struct nft_set *set,
4771 const struct nft_set_ext *ext)
4773 struct nft_set_elem_expr *elem_expr;
4774 u32 size, num_exprs = 0;
4775 struct nft_expr *expr;
4776 struct nlattr *nest;
4778 elem_expr = nft_set_ext_expr(ext);
4779 nft_setelem_expr_foreach(expr, elem_expr, size)
4782 if (num_exprs == 1) {
4783 expr = nft_setelem_expr_at(elem_expr, 0);
4784 if (nft_expr_dump(skb, NFTA_SET_ELEM_EXPR, expr) < 0)
4788 } else if (num_exprs > 1) {
4789 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_EXPRESSIONS);
4791 goto nla_put_failure;
4793 nft_setelem_expr_foreach(expr, elem_expr, size) {
4794 expr = nft_setelem_expr_at(elem_expr, size);
4795 if (nft_expr_dump(skb, NFTA_LIST_ELEM, expr) < 0)
4796 goto nla_put_failure;
4798 nla_nest_end(skb, nest);
4806 static int nf_tables_fill_setelem(struct sk_buff *skb,
4807 const struct nft_set *set,
4808 const struct nft_set_elem *elem)
4810 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
4811 unsigned char *b = skb_tail_pointer(skb);
4812 struct nlattr *nest;
4814 nest = nla_nest_start_noflag(skb, NFTA_LIST_ELEM);
4816 goto nla_put_failure;
4818 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY) &&
4819 nft_data_dump(skb, NFTA_SET_ELEM_KEY, nft_set_ext_key(ext),
4820 NFT_DATA_VALUE, set->klen) < 0)
4821 goto nla_put_failure;
4823 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END) &&
4824 nft_data_dump(skb, NFTA_SET_ELEM_KEY_END, nft_set_ext_key_end(ext),
4825 NFT_DATA_VALUE, set->klen) < 0)
4826 goto nla_put_failure;
4828 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
4829 nft_data_dump(skb, NFTA_SET_ELEM_DATA, nft_set_ext_data(ext),
4830 set->dtype == NFT_DATA_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE,
4832 goto nla_put_failure;
4834 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS) &&
4835 nft_set_elem_expr_dump(skb, set, ext))
4836 goto nla_put_failure;
4838 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
4839 nla_put_string(skb, NFTA_SET_ELEM_OBJREF,
4840 (*nft_set_ext_obj(ext))->key.name) < 0)
4841 goto nla_put_failure;
4843 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
4844 nla_put_be32(skb, NFTA_SET_ELEM_FLAGS,
4845 htonl(*nft_set_ext_flags(ext))))
4846 goto nla_put_failure;
4848 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT) &&
4849 nla_put_be64(skb, NFTA_SET_ELEM_TIMEOUT,
4850 nf_jiffies64_to_msecs(*nft_set_ext_timeout(ext)),
4852 goto nla_put_failure;
4854 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
4855 u64 expires, now = get_jiffies_64();
4857 expires = *nft_set_ext_expiration(ext);
4858 if (time_before64(now, expires))
4863 if (nla_put_be64(skb, NFTA_SET_ELEM_EXPIRATION,
4864 nf_jiffies64_to_msecs(expires),
4866 goto nla_put_failure;
4869 if (nft_set_ext_exists(ext, NFT_SET_EXT_USERDATA)) {
4870 struct nft_userdata *udata;
4872 udata = nft_set_ext_userdata(ext);
4873 if (nla_put(skb, NFTA_SET_ELEM_USERDATA,
4874 udata->len + 1, udata->data))
4875 goto nla_put_failure;
4878 nla_nest_end(skb, nest);
4886 struct nft_set_dump_args {
4887 const struct netlink_callback *cb;
4888 struct nft_set_iter iter;
4889 struct sk_buff *skb;
4892 static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
4893 struct nft_set *set,
4894 const struct nft_set_iter *iter,
4895 struct nft_set_elem *elem)
4897 struct nft_set_dump_args *args;
4899 args = container_of(iter, struct nft_set_dump_args, iter);
4900 return nf_tables_fill_setelem(args->skb, set, elem);
4903 struct nft_set_dump_ctx {
4904 const struct nft_set *set;
4908 static int nft_set_catchall_dump(struct net *net, struct sk_buff *skb,
4909 const struct nft_set *set)
4911 struct nft_set_elem_catchall *catchall;
4912 u8 genmask = nft_genmask_cur(net);
4913 struct nft_set_elem elem;
4914 struct nft_set_ext *ext;
4917 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
4918 ext = nft_set_elem_ext(set, catchall->elem);
4919 if (!nft_set_elem_active(ext, genmask) ||
4920 nft_set_elem_expired(ext))
4923 elem.priv = catchall->elem;
4924 ret = nf_tables_fill_setelem(skb, set, &elem);
4931 static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
4933 struct nft_set_dump_ctx *dump_ctx = cb->data;
4934 struct net *net = sock_net(skb->sk);
4935 struct nftables_pernet *nft_net;
4936 struct nft_table *table;
4937 struct nft_set *set;
4938 struct nft_set_dump_args args;
4939 bool set_found = false;
4940 struct nlmsghdr *nlh;
4941 struct nlattr *nest;
4946 nft_net = nft_pernet(net);
4947 list_for_each_entry_rcu(table, &nft_net->tables, list) {
4948 if (dump_ctx->ctx.family != NFPROTO_UNSPEC &&
4949 dump_ctx->ctx.family != table->family)
4952 if (table != dump_ctx->ctx.table)
4955 list_for_each_entry_rcu(set, &table->sets, list) {
4956 if (set == dump_ctx->set) {
4969 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWSETELEM);
4970 portid = NETLINK_CB(cb->skb).portid;
4971 seq = cb->nlh->nlmsg_seq;
4973 nlh = nfnl_msg_put(skb, portid, seq, event, NLM_F_MULTI,
4974 table->family, NFNETLINK_V0, nft_base_seq(net));
4976 goto nla_put_failure;
4978 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_TABLE, table->name))
4979 goto nla_put_failure;
4980 if (nla_put_string(skb, NFTA_SET_ELEM_LIST_SET, set->name))
4981 goto nla_put_failure;
4983 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
4985 goto nla_put_failure;
4989 args.iter.genmask = nft_genmask_cur(net);
4990 args.iter.skip = cb->args[0];
4991 args.iter.count = 0;
4993 args.iter.fn = nf_tables_dump_setelem;
4994 set->ops->walk(&dump_ctx->ctx, set, &args.iter);
4996 if (!args.iter.err && args.iter.count == cb->args[0])
4997 args.iter.err = nft_set_catchall_dump(net, skb, set);
5000 nla_nest_end(skb, nest);
5001 nlmsg_end(skb, nlh);
5003 if (args.iter.err && args.iter.err != -EMSGSIZE)
5004 return args.iter.err;
5005 if (args.iter.count == cb->args[0])
5008 cb->args[0] = args.iter.count;
5016 static int nf_tables_dump_set_start(struct netlink_callback *cb)
5018 struct nft_set_dump_ctx *dump_ctx = cb->data;
5020 cb->data = kmemdup(dump_ctx, sizeof(*dump_ctx), GFP_ATOMIC);
5022 return cb->data ? 0 : -ENOMEM;
5025 static int nf_tables_dump_set_done(struct netlink_callback *cb)
5031 static int nf_tables_fill_setelem_info(struct sk_buff *skb,
5032 const struct nft_ctx *ctx, u32 seq,
5033 u32 portid, int event, u16 flags,
5034 const struct nft_set *set,
5035 const struct nft_set_elem *elem)
5037 struct nlmsghdr *nlh;
5038 struct nlattr *nest;
5041 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
5042 nlh = nfnl_msg_put(skb, portid, seq, event, flags, ctx->family,
5043 NFNETLINK_V0, nft_base_seq(ctx->net));
5045 goto nla_put_failure;
5047 if (nla_put_string(skb, NFTA_SET_TABLE, ctx->table->name))
5048 goto nla_put_failure;
5049 if (nla_put_string(skb, NFTA_SET_NAME, set->name))
5050 goto nla_put_failure;
5052 nest = nla_nest_start_noflag(skb, NFTA_SET_ELEM_LIST_ELEMENTS);
5054 goto nla_put_failure;
5056 err = nf_tables_fill_setelem(skb, set, elem);
5058 goto nla_put_failure;
5060 nla_nest_end(skb, nest);
5062 nlmsg_end(skb, nlh);
5066 nlmsg_trim(skb, nlh);
5070 static int nft_setelem_parse_flags(const struct nft_set *set,
5071 const struct nlattr *attr, u32 *flags)
5076 *flags = ntohl(nla_get_be32(attr));
5077 if (*flags & ~(NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
5079 if (!(set->flags & NFT_SET_INTERVAL) &&
5080 *flags & NFT_SET_ELEM_INTERVAL_END)
5086 static int nft_setelem_parse_key(struct nft_ctx *ctx, struct nft_set *set,
5087 struct nft_data *key, struct nlattr *attr)
5089 struct nft_data_desc desc;
5092 err = nft_data_init(ctx, key, NFT_DATA_VALUE_MAXLEN, &desc, attr);
5096 if (desc.type != NFT_DATA_VALUE || desc.len != set->klen) {
5097 nft_data_release(key, desc.type);
5104 static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set,
5105 struct nft_data_desc *desc,
5106 struct nft_data *data,
5107 struct nlattr *attr)
5111 err = nft_data_init(ctx, data, NFT_DATA_VALUE_MAXLEN, desc, attr);
5115 if (desc->type != NFT_DATA_VERDICT && desc->len != set->dlen) {
5116 nft_data_release(data, desc->type);
5123 static void *nft_setelem_catchall_get(const struct net *net,
5124 const struct nft_set *set)
5126 struct nft_set_elem_catchall *catchall;
5127 u8 genmask = nft_genmask_cur(net);
5128 struct nft_set_ext *ext;
5131 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5132 ext = nft_set_elem_ext(set, catchall->elem);
5133 if (!nft_set_elem_active(ext, genmask) ||
5134 nft_set_elem_expired(ext))
5137 priv = catchall->elem;
5144 static int nft_setelem_get(struct nft_ctx *ctx, struct nft_set *set,
5145 struct nft_set_elem *elem, u32 flags)
5149 if (!(flags & NFT_SET_ELEM_CATCHALL)) {
5150 priv = set->ops->get(ctx->net, set, elem, flags);
5152 return PTR_ERR(priv);
5154 priv = nft_setelem_catchall_get(ctx->net, set);
5163 static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5164 const struct nlattr *attr)
5166 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
5167 struct nft_set_elem elem;
5168 struct sk_buff *skb;
5172 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5173 nft_set_elem_policy, NULL);
5177 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5181 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5184 if (nla[NFTA_SET_ELEM_KEY]) {
5185 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5186 nla[NFTA_SET_ELEM_KEY]);
5191 if (nla[NFTA_SET_ELEM_KEY_END]) {
5192 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5193 nla[NFTA_SET_ELEM_KEY_END]);
5198 err = nft_setelem_get(ctx, set, &elem, flags);
5203 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
5207 err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
5208 NFT_MSG_NEWSETELEM, 0, set, &elem);
5210 goto err_fill_setelem;
5212 return nfnetlink_unicast(skb, ctx->net, ctx->portid);
5219 /* called with rcu_read_lock held */
5220 static int nf_tables_getsetelem(struct sk_buff *skb,
5221 const struct nfnl_info *info,
5222 const struct nlattr * const nla[])
5224 struct netlink_ext_ack *extack = info->extack;
5225 u8 genmask = nft_genmask_cur(info->net);
5226 u8 family = info->nfmsg->nfgen_family;
5227 struct net *net = info->net;
5228 struct nft_table *table;
5229 struct nft_set *set;
5230 struct nlattr *attr;
5234 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
5235 genmask, NETLINK_CB(skb).portid);
5236 if (IS_ERR(table)) {
5237 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
5238 return PTR_ERR(table);
5241 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
5243 return PTR_ERR(set);
5245 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
5247 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
5248 struct netlink_dump_control c = {
5249 .start = nf_tables_dump_set_start,
5250 .dump = nf_tables_dump_set,
5251 .done = nf_tables_dump_set_done,
5252 .module = THIS_MODULE,
5254 struct nft_set_dump_ctx dump_ctx = {
5260 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
5263 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
5266 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
5267 err = nft_get_set_elem(&ctx, set, attr);
5275 static void nf_tables_setelem_notify(const struct nft_ctx *ctx,
5276 const struct nft_set *set,
5277 const struct nft_set_elem *elem,
5280 struct nftables_pernet *nft_net;
5281 struct net *net = ctx->net;
5282 u32 portid = ctx->portid;
5283 struct sk_buff *skb;
5287 if (!ctx->report && !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
5290 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5294 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
5295 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
5297 err = nf_tables_fill_setelem_info(skb, ctx, 0, portid, event, flags,
5304 nft_net = nft_pernet(net);
5305 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
5308 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
5311 static struct nft_trans *nft_trans_elem_alloc(struct nft_ctx *ctx,
5313 struct nft_set *set)
5315 struct nft_trans *trans;
5317 trans = nft_trans_alloc(ctx, msg_type, sizeof(struct nft_trans_elem));
5321 nft_trans_elem_set(trans) = set;
5325 struct nft_expr *nft_set_elem_expr_alloc(const struct nft_ctx *ctx,
5326 const struct nft_set *set,
5327 const struct nlattr *attr)
5329 struct nft_expr *expr;
5332 expr = nft_expr_init(ctx, attr);
5337 if (!(expr->ops->type->flags & NFT_EXPR_STATEFUL))
5338 goto err_set_elem_expr;
5340 if (expr->ops->type->flags & NFT_EXPR_GC) {
5341 if (set->flags & NFT_SET_TIMEOUT)
5342 goto err_set_elem_expr;
5343 if (!set->ops->gc_init)
5344 goto err_set_elem_expr;
5345 set->ops->gc_init(set);
5351 nft_expr_destroy(ctx, expr);
5352 return ERR_PTR(err);
5355 void *nft_set_elem_init(const struct nft_set *set,
5356 const struct nft_set_ext_tmpl *tmpl,
5357 const u32 *key, const u32 *key_end,
5358 const u32 *data, u64 timeout, u64 expiration, gfp_t gfp)
5360 struct nft_set_ext *ext;
5363 elem = kzalloc(set->ops->elemsize + tmpl->len, gfp);
5367 ext = nft_set_elem_ext(set, elem);
5368 nft_set_ext_init(ext, tmpl);
5370 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY))
5371 memcpy(nft_set_ext_key(ext), key, set->klen);
5372 if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END))
5373 memcpy(nft_set_ext_key_end(ext), key_end, set->klen);
5374 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
5375 memcpy(nft_set_ext_data(ext), data, set->dlen);
5376 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION)) {
5377 *nft_set_ext_expiration(ext) = get_jiffies_64() + expiration;
5378 if (expiration == 0)
5379 *nft_set_ext_expiration(ext) += timeout;
5381 if (nft_set_ext_exists(ext, NFT_SET_EXT_TIMEOUT))
5382 *nft_set_ext_timeout(ext) = timeout;
5387 static void __nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5388 struct nft_expr *expr)
5390 if (expr->ops->destroy_clone) {
5391 expr->ops->destroy_clone(ctx, expr);
5392 module_put(expr->ops->type->owner);
5394 nf_tables_expr_destroy(ctx, expr);
5398 static void nft_set_elem_expr_destroy(const struct nft_ctx *ctx,
5399 struct nft_set_elem_expr *elem_expr)
5401 struct nft_expr *expr;
5404 nft_setelem_expr_foreach(expr, elem_expr, size)
5405 __nft_set_elem_expr_destroy(ctx, expr);
5408 void nft_set_elem_destroy(const struct nft_set *set, void *elem,
5411 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5412 struct nft_ctx ctx = {
5413 .net = read_pnet(&set->net),
5414 .family = set->table->family,
5417 nft_data_release(nft_set_ext_key(ext), NFT_DATA_VALUE);
5418 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
5419 nft_data_release(nft_set_ext_data(ext), set->dtype);
5420 if (destroy_expr && nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
5421 nft_set_elem_expr_destroy(&ctx, nft_set_ext_expr(ext));
5423 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
5424 (*nft_set_ext_obj(ext))->use--;
5427 EXPORT_SYMBOL_GPL(nft_set_elem_destroy);
5429 /* Only called from commit path, nft_setelem_data_deactivate() already deals
5430 * with the refcounting from the preparation phase.
5432 static void nf_tables_set_elem_destroy(const struct nft_ctx *ctx,
5433 const struct nft_set *set, void *elem)
5435 struct nft_set_ext *ext = nft_set_elem_ext(set, elem);
5437 if (nft_set_ext_exists(ext, NFT_SET_EXT_EXPRESSIONS))
5438 nft_set_elem_expr_destroy(ctx, nft_set_ext_expr(ext));
5443 int nft_set_elem_expr_clone(const struct nft_ctx *ctx, struct nft_set *set,
5444 struct nft_expr *expr_array[])
5446 struct nft_expr *expr;
5449 for (i = 0; i < set->num_exprs; i++) {
5450 expr = kzalloc(set->exprs[i]->ops->size, GFP_KERNEL);
5454 err = nft_expr_clone(expr, set->exprs[i]);
5456 nft_expr_destroy(ctx, expr);
5459 expr_array[i] = expr;
5465 for (k = i - 1; k >= 0; k--)
5466 nft_expr_destroy(ctx, expr_array[k]);
5471 static int nft_set_elem_expr_setup(struct nft_ctx *ctx,
5472 const struct nft_set_ext *ext,
5473 struct nft_expr *expr_array[],
5476 struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext);
5477 struct nft_expr *expr;
5480 for (i = 0; i < num_exprs; i++) {
5481 expr = nft_setelem_expr_at(elem_expr, elem_expr->size);
5482 err = nft_expr_clone(expr, expr_array[i]);
5484 goto err_elem_expr_setup;
5486 elem_expr->size += expr_array[i]->ops->size;
5487 nft_expr_destroy(ctx, expr_array[i]);
5488 expr_array[i] = NULL;
5493 err_elem_expr_setup:
5494 for (; i < num_exprs; i++) {
5495 nft_expr_destroy(ctx, expr_array[i]);
5496 expr_array[i] = NULL;
5502 struct nft_set_ext *nft_set_catchall_lookup(const struct net *net,
5503 const struct nft_set *set)
5505 struct nft_set_elem_catchall *catchall;
5506 u8 genmask = nft_genmask_cur(net);
5507 struct nft_set_ext *ext;
5509 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
5510 ext = nft_set_elem_ext(set, catchall->elem);
5511 if (nft_set_elem_active(ext, genmask) &&
5512 !nft_set_elem_expired(ext))
5518 EXPORT_SYMBOL_GPL(nft_set_catchall_lookup);
5520 void *nft_set_catchall_gc(const struct nft_set *set)
5522 struct nft_set_elem_catchall *catchall, *next;
5523 struct nft_set_ext *ext;
5526 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5527 ext = nft_set_elem_ext(set, catchall->elem);
5529 if (!nft_set_elem_expired(ext) ||
5530 nft_set_elem_mark_busy(ext))
5533 elem = catchall->elem;
5534 list_del_rcu(&catchall->list);
5535 kfree_rcu(catchall, rcu);
5541 EXPORT_SYMBOL_GPL(nft_set_catchall_gc);
5543 static int nft_setelem_catchall_insert(const struct net *net,
5544 struct nft_set *set,
5545 const struct nft_set_elem *elem,
5546 struct nft_set_ext **pext)
5548 struct nft_set_elem_catchall *catchall;
5549 u8 genmask = nft_genmask_next(net);
5550 struct nft_set_ext *ext;
5552 list_for_each_entry(catchall, &set->catchall_list, list) {
5553 ext = nft_set_elem_ext(set, catchall->elem);
5554 if (nft_set_elem_active(ext, genmask)) {
5560 catchall = kmalloc(sizeof(*catchall), GFP_KERNEL);
5564 catchall->elem = elem->priv;
5565 list_add_tail_rcu(&catchall->list, &set->catchall_list);
5570 static int nft_setelem_insert(const struct net *net,
5571 struct nft_set *set,
5572 const struct nft_set_elem *elem,
5573 struct nft_set_ext **ext, unsigned int flags)
5577 if (flags & NFT_SET_ELEM_CATCHALL)
5578 ret = nft_setelem_catchall_insert(net, set, elem, ext);
5580 ret = set->ops->insert(net, set, elem, ext);
5585 static bool nft_setelem_is_catchall(const struct nft_set *set,
5586 const struct nft_set_elem *elem)
5588 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5590 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
5591 *nft_set_ext_flags(ext) & NFT_SET_ELEM_CATCHALL)
5597 static void nft_setelem_activate(struct net *net, struct nft_set *set,
5598 struct nft_set_elem *elem)
5600 struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
5602 if (nft_setelem_is_catchall(set, elem)) {
5603 nft_set_elem_change_active(net, set, ext);
5604 nft_set_elem_clear_busy(ext);
5606 set->ops->activate(net, set, elem);
5610 static int nft_setelem_catchall_deactivate(const struct net *net,
5611 struct nft_set *set,
5612 struct nft_set_elem *elem)
5614 struct nft_set_elem_catchall *catchall;
5615 struct nft_set_ext *ext;
5617 list_for_each_entry(catchall, &set->catchall_list, list) {
5618 ext = nft_set_elem_ext(set, catchall->elem);
5619 if (!nft_is_active(net, ext) ||
5620 nft_set_elem_mark_busy(ext))
5624 elem->priv = catchall->elem;
5625 nft_set_elem_change_active(net, set, ext);
5632 static int __nft_setelem_deactivate(const struct net *net,
5633 struct nft_set *set,
5634 struct nft_set_elem *elem)
5638 priv = set->ops->deactivate(net, set, elem);
5649 static int nft_setelem_deactivate(const struct net *net,
5650 struct nft_set *set,
5651 struct nft_set_elem *elem, u32 flags)
5655 if (flags & NFT_SET_ELEM_CATCHALL)
5656 ret = nft_setelem_catchall_deactivate(net, set, elem);
5658 ret = __nft_setelem_deactivate(net, set, elem);
5663 static void nft_setelem_catchall_remove(const struct net *net,
5664 const struct nft_set *set,
5665 const struct nft_set_elem *elem)
5667 struct nft_set_elem_catchall *catchall, *next;
5669 list_for_each_entry_safe(catchall, next, &set->catchall_list, list) {
5670 if (catchall->elem == elem->priv) {
5671 list_del_rcu(&catchall->list);
5672 kfree_rcu(catchall, rcu);
5678 static void nft_setelem_remove(const struct net *net,
5679 const struct nft_set *set,
5680 const struct nft_set_elem *elem)
5682 if (nft_setelem_is_catchall(set, elem))
5683 nft_setelem_catchall_remove(net, set, elem);
5685 set->ops->remove(net, set, elem);
5688 static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
5689 const struct nlattr *attr, u32 nlmsg_flags)
5691 struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
5692 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
5693 u8 genmask = nft_genmask_next(ctx->net);
5694 u32 flags = 0, size = 0, num_exprs = 0;
5695 struct nft_set_ext_tmpl tmpl;
5696 struct nft_set_ext *ext, *ext2;
5697 struct nft_set_elem elem;
5698 struct nft_set_binding *binding;
5699 struct nft_object *obj = NULL;
5700 struct nft_userdata *udata;
5701 struct nft_data_desc desc;
5702 enum nft_registers dreg;
5703 struct nft_trans *trans;
5709 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
5710 nft_set_elem_policy, NULL);
5714 nft_set_ext_prepare(&tmpl);
5716 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
5720 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
5724 nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
5726 if (set->flags & NFT_SET_MAP) {
5727 if (nla[NFTA_SET_ELEM_DATA] == NULL &&
5728 !(flags & NFT_SET_ELEM_INTERVAL_END))
5731 if (nla[NFTA_SET_ELEM_DATA] != NULL)
5735 if ((flags & NFT_SET_ELEM_INTERVAL_END) &&
5736 (nla[NFTA_SET_ELEM_DATA] ||
5737 nla[NFTA_SET_ELEM_OBJREF] ||
5738 nla[NFTA_SET_ELEM_TIMEOUT] ||
5739 nla[NFTA_SET_ELEM_EXPIRATION] ||
5740 nla[NFTA_SET_ELEM_USERDATA] ||
5741 nla[NFTA_SET_ELEM_EXPR] ||
5742 nla[NFTA_SET_ELEM_EXPRESSIONS]))
5746 if (nla[NFTA_SET_ELEM_TIMEOUT] != NULL) {
5747 if (!(set->flags & NFT_SET_TIMEOUT))
5749 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_TIMEOUT],
5753 } else if (set->flags & NFT_SET_TIMEOUT) {
5754 timeout = set->timeout;
5758 if (nla[NFTA_SET_ELEM_EXPIRATION] != NULL) {
5759 if (!(set->flags & NFT_SET_TIMEOUT))
5761 err = nf_msecs_to_jiffies64(nla[NFTA_SET_ELEM_EXPIRATION],
5767 if (nla[NFTA_SET_ELEM_EXPR]) {
5768 struct nft_expr *expr;
5770 if (set->num_exprs && set->num_exprs != 1)
5773 expr = nft_set_elem_expr_alloc(ctx, set,
5774 nla[NFTA_SET_ELEM_EXPR]);
5776 return PTR_ERR(expr);
5778 expr_array[0] = expr;
5781 if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
5783 goto err_set_elem_expr;
5785 } else if (nla[NFTA_SET_ELEM_EXPRESSIONS]) {
5786 struct nft_expr *expr;
5791 nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
5792 if (i == NFT_SET_EXPR_MAX ||
5793 (set->num_exprs && set->num_exprs == i)) {
5795 goto err_set_elem_expr;
5797 if (nla_type(tmp) != NFTA_LIST_ELEM) {
5799 goto err_set_elem_expr;
5801 expr = nft_set_elem_expr_alloc(ctx, set, tmp);
5803 err = PTR_ERR(expr);
5804 goto err_set_elem_expr;
5806 expr_array[i] = expr;
5809 if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
5811 goto err_set_elem_expr;
5815 if (set->num_exprs && set->num_exprs != i) {
5817 goto err_set_elem_expr;
5819 } else if (set->num_exprs > 0) {
5820 err = nft_set_elem_expr_clone(ctx, set, expr_array);
5822 goto err_set_elem_expr_clone;
5824 num_exprs = set->num_exprs;
5827 if (nla[NFTA_SET_ELEM_KEY]) {
5828 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
5829 nla[NFTA_SET_ELEM_KEY]);
5831 goto err_set_elem_expr;
5833 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
5836 if (nla[NFTA_SET_ELEM_KEY_END]) {
5837 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
5838 nla[NFTA_SET_ELEM_KEY_END]);
5842 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
5846 nft_set_ext_add(&tmpl, NFT_SET_EXT_EXPIRATION);
5847 if (timeout != set->timeout)
5848 nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
5852 for (i = 0; i < num_exprs; i++)
5853 size += expr_array[i]->ops->size;
5855 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
5856 sizeof(struct nft_set_elem_expr) +
5860 if (nla[NFTA_SET_ELEM_OBJREF] != NULL) {
5861 if (!(set->flags & NFT_SET_OBJECT)) {
5863 goto err_parse_key_end;
5865 obj = nft_obj_lookup(ctx->net, ctx->table,
5866 nla[NFTA_SET_ELEM_OBJREF],
5867 set->objtype, genmask);
5870 goto err_parse_key_end;
5872 nft_set_ext_add(&tmpl, NFT_SET_EXT_OBJREF);
5875 if (nla[NFTA_SET_ELEM_DATA] != NULL) {
5876 err = nft_setelem_parse_data(ctx, set, &desc, &elem.data.val,
5877 nla[NFTA_SET_ELEM_DATA]);
5879 goto err_parse_key_end;
5881 dreg = nft_type_to_reg(set->dtype);
5882 list_for_each_entry(binding, &set->bindings, list) {
5883 struct nft_ctx bind_ctx = {
5885 .family = ctx->family,
5886 .table = ctx->table,
5887 .chain = (struct nft_chain *)binding->chain,
5890 if (!(binding->flags & NFT_SET_MAP))
5893 err = nft_validate_register_store(&bind_ctx, dreg,
5895 desc.type, desc.len);
5897 goto err_parse_data;
5899 if (desc.type == NFT_DATA_VERDICT &&
5900 (elem.data.val.verdict.code == NFT_GOTO ||
5901 elem.data.val.verdict.code == NFT_JUMP))
5902 nft_validate_state_update(ctx->net,
5906 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_DATA, desc.len);
5909 /* The full maximum length of userdata can exceed the maximum
5910 * offset value (U8_MAX) for following extensions, therefor it
5911 * must be the last extension added.
5914 if (nla[NFTA_SET_ELEM_USERDATA] != NULL) {
5915 ulen = nla_len(nla[NFTA_SET_ELEM_USERDATA]);
5917 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_USERDATA,
5922 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
5923 elem.key_end.val.data, elem.data.val.data,
5924 timeout, expiration, GFP_KERNEL);
5925 if (elem.priv == NULL)
5926 goto err_parse_data;
5928 ext = nft_set_elem_ext(set, elem.priv);
5930 *nft_set_ext_flags(ext) = flags;
5932 udata = nft_set_ext_userdata(ext);
5933 udata->len = ulen - 1;
5934 nla_memcpy(&udata->data, nla[NFTA_SET_ELEM_USERDATA], ulen);
5937 *nft_set_ext_obj(ext) = obj;
5940 err = nft_set_elem_expr_setup(ctx, ext, expr_array, num_exprs);
5944 trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
5945 if (trans == NULL) {
5950 ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK;
5952 err = nft_setelem_insert(ctx->net, set, &elem, &ext2, flags);
5954 if (err == -EEXIST) {
5955 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA) ^
5956 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) ||
5957 nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) ^
5958 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF))
5959 goto err_element_clash;
5960 if ((nft_set_ext_exists(ext, NFT_SET_EXT_DATA) &&
5961 nft_set_ext_exists(ext2, NFT_SET_EXT_DATA) &&
5962 memcmp(nft_set_ext_data(ext),
5963 nft_set_ext_data(ext2), set->dlen) != 0) ||
5964 (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF) &&
5965 nft_set_ext_exists(ext2, NFT_SET_EXT_OBJREF) &&
5966 *nft_set_ext_obj(ext) != *nft_set_ext_obj(ext2)))
5967 goto err_element_clash;
5968 else if (!(nlmsg_flags & NLM_F_EXCL))
5970 } else if (err == -ENOTEMPTY) {
5971 /* ENOTEMPTY reports overlapping between this element
5972 * and an existing one.
5976 goto err_element_clash;
5979 if (!(flags & NFT_SET_ELEM_CATCHALL) && set->size &&
5980 !atomic_add_unless(&set->nelems, 1, set->size + set->ndeact)) {
5985 nft_trans_elem(trans) = elem;
5986 nft_trans_commit_list_add_tail(ctx->net, trans);
5990 nft_setelem_remove(ctx->net, set, &elem);
5997 nf_tables_set_elem_destroy(ctx, set, elem.priv);
5999 if (nla[NFTA_SET_ELEM_DATA] != NULL)
6000 nft_data_release(&elem.data.val, desc.type);
6002 nft_data_release(&elem.key_end.val, NFT_DATA_VALUE);
6004 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
6006 for (i = 0; i < num_exprs && expr_array[i]; i++)
6007 nft_expr_destroy(ctx, expr_array[i]);
6008 err_set_elem_expr_clone:
6012 static int nf_tables_newsetelem(struct sk_buff *skb,
6013 const struct nfnl_info *info,
6014 const struct nlattr * const nla[])
6016 struct nftables_pernet *nft_net = nft_pernet(info->net);
6017 struct netlink_ext_ack *extack = info->extack;
6018 u8 genmask = nft_genmask_next(info->net);
6019 u8 family = info->nfmsg->nfgen_family;
6020 struct net *net = info->net;
6021 const struct nlattr *attr;
6022 struct nft_table *table;
6023 struct nft_set *set;
6027 if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
6030 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6031 genmask, NETLINK_CB(skb).portid);
6032 if (IS_ERR(table)) {
6033 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6034 return PTR_ERR(table);
6037 set = nft_set_lookup_global(net, table, nla[NFTA_SET_ELEM_LIST_SET],
6038 nla[NFTA_SET_ELEM_LIST_SET_ID], genmask);
6040 return PTR_ERR(set);
6042 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6045 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6047 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6048 err = nft_add_set_elem(&ctx, set, attr, info->nlh->nlmsg_flags);
6053 if (nft_net->validate_state == NFT_VALIDATE_DO)
6054 return nft_table_validate(net, table);
6060 * nft_data_hold - hold a nft_data item
6062 * @data: struct nft_data to release
6063 * @type: type of data
6065 * Hold a nft_data item. NFT_DATA_VALUE types can be silently discarded,
6066 * NFT_DATA_VERDICT bumps the reference to chains in case of NFT_JUMP and
6067 * NFT_GOTO verdicts. This function must be called on active data objects
6068 * from the second phase of the commit protocol.
6070 void nft_data_hold(const struct nft_data *data, enum nft_data_types type)
6072 struct nft_chain *chain;
6073 struct nft_rule *rule;
6075 if (type == NFT_DATA_VERDICT) {
6076 switch (data->verdict.code) {
6079 chain = data->verdict.chain;
6082 if (!nft_chain_is_bound(chain))
6085 chain->table->use++;
6086 list_for_each_entry(rule, &chain->rules, list)
6089 nft_chain_add(chain->table, chain);
6095 static void nft_setelem_data_activate(const struct net *net,
6096 const struct nft_set *set,
6097 struct nft_set_elem *elem)
6099 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6101 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6102 nft_data_hold(nft_set_ext_data(ext), set->dtype);
6103 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6104 (*nft_set_ext_obj(ext))->use++;
6107 static void nft_setelem_data_deactivate(const struct net *net,
6108 const struct nft_set *set,
6109 struct nft_set_elem *elem)
6111 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
6113 if (nft_set_ext_exists(ext, NFT_SET_EXT_DATA))
6114 nft_data_release(nft_set_ext_data(ext), set->dtype);
6115 if (nft_set_ext_exists(ext, NFT_SET_EXT_OBJREF))
6116 (*nft_set_ext_obj(ext))->use--;
6119 static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
6120 const struct nlattr *attr)
6122 struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
6123 struct nft_set_ext_tmpl tmpl;
6124 struct nft_set_elem elem;
6125 struct nft_set_ext *ext;
6126 struct nft_trans *trans;
6130 err = nla_parse_nested_deprecated(nla, NFTA_SET_ELEM_MAX, attr,
6131 nft_set_elem_policy, NULL);
6135 err = nft_setelem_parse_flags(set, nla[NFTA_SET_ELEM_FLAGS], &flags);
6139 if (!nla[NFTA_SET_ELEM_KEY] && !(flags & NFT_SET_ELEM_CATCHALL))
6142 nft_set_ext_prepare(&tmpl);
6145 nft_set_ext_add(&tmpl, NFT_SET_EXT_FLAGS);
6147 if (nla[NFTA_SET_ELEM_KEY]) {
6148 err = nft_setelem_parse_key(ctx, set, &elem.key.val,
6149 nla[NFTA_SET_ELEM_KEY]);
6153 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY, set->klen);
6156 if (nla[NFTA_SET_ELEM_KEY_END]) {
6157 err = nft_setelem_parse_key(ctx, set, &elem.key_end.val,
6158 nla[NFTA_SET_ELEM_KEY_END]);
6162 nft_set_ext_add_length(&tmpl, NFT_SET_EXT_KEY_END, set->klen);
6166 elem.priv = nft_set_elem_init(set, &tmpl, elem.key.val.data,
6167 elem.key_end.val.data, NULL, 0, 0,
6169 if (elem.priv == NULL)
6172 ext = nft_set_elem_ext(set, elem.priv);
6174 *nft_set_ext_flags(ext) = flags;
6176 trans = nft_trans_elem_alloc(ctx, NFT_MSG_DELSETELEM, set);
6180 err = nft_setelem_deactivate(ctx->net, set, &elem, flags);
6184 nft_setelem_data_deactivate(ctx->net, set, &elem);
6186 nft_trans_elem(trans) = elem;
6187 nft_trans_commit_list_add_tail(ctx->net, trans);
6195 nft_data_release(&elem.key.val, NFT_DATA_VALUE);
6199 static int nft_setelem_flush(const struct nft_ctx *ctx,
6200 struct nft_set *set,
6201 const struct nft_set_iter *iter,
6202 struct nft_set_elem *elem)
6204 struct nft_trans *trans;
6207 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6208 sizeof(struct nft_trans_elem), GFP_ATOMIC);
6212 if (!set->ops->flush(ctx->net, set, elem->priv)) {
6218 nft_setelem_data_deactivate(ctx->net, set, elem);
6219 nft_trans_elem_set(trans) = set;
6220 nft_trans_elem(trans) = *elem;
6221 nft_trans_commit_list_add_tail(ctx->net, trans);
6229 static int __nft_set_catchall_flush(const struct nft_ctx *ctx,
6230 struct nft_set *set,
6231 struct nft_set_elem *elem)
6233 struct nft_trans *trans;
6235 trans = nft_trans_alloc_gfp(ctx, NFT_MSG_DELSETELEM,
6236 sizeof(struct nft_trans_elem), GFP_KERNEL);
6240 nft_setelem_data_deactivate(ctx->net, set, elem);
6241 nft_trans_elem_set(trans) = set;
6242 nft_trans_elem(trans) = *elem;
6243 nft_trans_commit_list_add_tail(ctx->net, trans);
6248 static int nft_set_catchall_flush(const struct nft_ctx *ctx,
6249 struct nft_set *set)
6251 u8 genmask = nft_genmask_next(ctx->net);
6252 struct nft_set_elem_catchall *catchall;
6253 struct nft_set_elem elem;
6254 struct nft_set_ext *ext;
6257 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
6258 ext = nft_set_elem_ext(set, catchall->elem);
6259 if (!nft_set_elem_active(ext, genmask) ||
6260 nft_set_elem_mark_busy(ext))
6263 elem.priv = catchall->elem;
6264 ret = __nft_set_catchall_flush(ctx, set, &elem);
6272 static int nft_set_flush(struct nft_ctx *ctx, struct nft_set *set, u8 genmask)
6274 struct nft_set_iter iter = {
6276 .fn = nft_setelem_flush,
6279 set->ops->walk(ctx, set, &iter);
6281 iter.err = nft_set_catchall_flush(ctx, set);
6286 static int nf_tables_delsetelem(struct sk_buff *skb,
6287 const struct nfnl_info *info,
6288 const struct nlattr * const nla[])
6290 struct netlink_ext_ack *extack = info->extack;
6291 u8 genmask = nft_genmask_next(info->net);
6292 u8 family = info->nfmsg->nfgen_family;
6293 struct net *net = info->net;
6294 const struct nlattr *attr;
6295 struct nft_table *table;
6296 struct nft_set *set;
6300 table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
6301 genmask, NETLINK_CB(skb).portid);
6302 if (IS_ERR(table)) {
6303 NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
6304 return PTR_ERR(table);
6307 set = nft_set_lookup(table, nla[NFTA_SET_ELEM_LIST_SET], genmask);
6309 return PTR_ERR(set);
6310 if (!list_empty(&set->bindings) && set->flags & NFT_SET_CONSTANT)
6313 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6315 if (!nla[NFTA_SET_ELEM_LIST_ELEMENTS])
6316 return nft_set_flush(&ctx, set, genmask);
6318 nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
6319 err = nft_del_setelem(&ctx, set, attr);
6326 void nft_set_gc_batch_release(struct rcu_head *rcu)
6328 struct nft_set_gc_batch *gcb;
6331 gcb = container_of(rcu, struct nft_set_gc_batch, head.rcu);
6332 for (i = 0; i < gcb->head.cnt; i++)
6333 nft_set_elem_destroy(gcb->head.set, gcb->elems[i], true);
6337 struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set,
6340 struct nft_set_gc_batch *gcb;
6342 gcb = kzalloc(sizeof(*gcb), gfp);
6345 gcb->head.set = set;
6354 * nft_register_obj- register nf_tables stateful object type
6355 * @obj_type: object type
6357 * Registers the object type for use with nf_tables. Returns zero on
6358 * success or a negative errno code otherwise.
6360 int nft_register_obj(struct nft_object_type *obj_type)
6362 if (obj_type->type == NFT_OBJECT_UNSPEC)
6365 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6366 list_add_rcu(&obj_type->list, &nf_tables_objects);
6367 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6370 EXPORT_SYMBOL_GPL(nft_register_obj);
6373 * nft_unregister_obj - unregister nf_tables object type
6374 * @obj_type: object type
6376 * Unregisters the object type for use with nf_tables.
6378 void nft_unregister_obj(struct nft_object_type *obj_type)
6380 nfnl_lock(NFNL_SUBSYS_NFTABLES);
6381 list_del_rcu(&obj_type->list);
6382 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
6384 EXPORT_SYMBOL_GPL(nft_unregister_obj);
6386 struct nft_object *nft_obj_lookup(const struct net *net,
6387 const struct nft_table *table,
6388 const struct nlattr *nla, u32 objtype,
6391 struct nft_object_hash_key k = { .table = table };
6392 char search[NFT_OBJ_MAXNAMELEN];
6393 struct rhlist_head *tmp, *list;
6394 struct nft_object *obj;
6396 nla_strscpy(search, nla, sizeof(search));
6399 WARN_ON_ONCE(!rcu_read_lock_held() &&
6400 !lockdep_commit_lock_is_held(net));
6403 list = rhltable_lookup(&nft_objname_ht, &k, nft_objname_ht_params);
6407 rhl_for_each_entry_rcu(obj, tmp, list, rhlhead) {
6408 if (objtype == obj->ops->type->type &&
6409 nft_active_genmask(obj, genmask)) {
6416 return ERR_PTR(-ENOENT);
6418 EXPORT_SYMBOL_GPL(nft_obj_lookup);
6420 static struct nft_object *nft_obj_lookup_byhandle(const struct nft_table *table,
6421 const struct nlattr *nla,
6422 u32 objtype, u8 genmask)
6424 struct nft_object *obj;
6426 list_for_each_entry(obj, &table->objects, list) {
6427 if (be64_to_cpu(nla_get_be64(nla)) == obj->handle &&
6428 objtype == obj->ops->type->type &&
6429 nft_active_genmask(obj, genmask))
6432 return ERR_PTR(-ENOENT);
6435 static const struct nla_policy nft_obj_policy[NFTA_OBJ_MAX + 1] = {
6436 [NFTA_OBJ_TABLE] = { .type = NLA_STRING,
6437 .len = NFT_TABLE_MAXNAMELEN - 1 },
6438 [NFTA_OBJ_NAME] = { .type = NLA_STRING,
6439 .len = NFT_OBJ_MAXNAMELEN - 1 },
6440 [NFTA_OBJ_TYPE] = { .type = NLA_U32 },
6441 [NFTA_OBJ_DATA] = { .type = NLA_NESTED },
6442 [NFTA_OBJ_HANDLE] = { .type = NLA_U64},
6443 [NFTA_OBJ_USERDATA] = { .type = NLA_BINARY,
6444 .len = NFT_USERDATA_MAXLEN },
6447 static struct nft_object *nft_obj_init(const struct nft_ctx *ctx,
6448 const struct nft_object_type *type,
6449 const struct nlattr *attr)
6452 const struct nft_object_ops *ops;
6453 struct nft_object *obj;
6456 tb = kmalloc_array(type->maxattr + 1, sizeof(*tb), GFP_KERNEL);
6461 err = nla_parse_nested_deprecated(tb, type->maxattr, attr,
6462 type->policy, NULL);
6466 memset(tb, 0, sizeof(tb[0]) * (type->maxattr + 1));
6469 if (type->select_ops) {
6470 ops = type->select_ops(ctx, (const struct nlattr * const *)tb);
6480 obj = kzalloc(sizeof(*obj) + ops->size, GFP_KERNEL);
6484 err = ops->init(ctx, (const struct nlattr * const *)tb, obj);
6497 return ERR_PTR(err);
6500 static int nft_object_dump(struct sk_buff *skb, unsigned int attr,
6501 struct nft_object *obj, bool reset)
6503 struct nlattr *nest;
6505 nest = nla_nest_start_noflag(skb, attr);
6507 goto nla_put_failure;
6508 if (obj->ops->dump(skb, obj, reset) < 0)
6509 goto nla_put_failure;
6510 nla_nest_end(skb, nest);
6517 static const struct nft_object_type *__nft_obj_type_get(u32 objtype)
6519 const struct nft_object_type *type;
6521 list_for_each_entry(type, &nf_tables_objects, list) {
6522 if (objtype == type->type)
6528 static const struct nft_object_type *
6529 nft_obj_type_get(struct net *net, u32 objtype)
6531 const struct nft_object_type *type;
6533 type = __nft_obj_type_get(objtype);
6534 if (type != NULL && try_module_get(type->owner))
6537 lockdep_nfnl_nft_mutex_not_held();
6538 #ifdef CONFIG_MODULES
6540 if (nft_request_module(net, "nft-obj-%u", objtype) == -EAGAIN)
6541 return ERR_PTR(-EAGAIN);
6544 return ERR_PTR(-ENOENT);
6547 static int nf_tables_updobj(const struct nft_ctx *ctx,
6548 const struct nft_object_type *type,
6549 const struct nlattr *attr,
6550 struct nft_object *obj)
6552 struct nft_object *newobj;
6553 struct nft_trans *trans;
6556 if (!try_module_get(type->owner))
6559 trans = nft_trans_alloc(ctx, NFT_MSG_NEWOBJ,
6560 sizeof(struct nft_trans_obj));
6564 newobj = nft_obj_init(ctx, type, attr);
6565 if (IS_ERR(newobj)) {
6566 err = PTR_ERR(newobj);
6567 goto err_free_trans;
6570 nft_trans_obj(trans) = obj;
6571 nft_trans_obj_update(trans) = true;
6572 nft_trans_obj_newobj(trans) = newobj;
6573 nft_trans_commit_list_add_tail(ctx->net, trans);
6580 module_put(type->owner);
6584 static int nf_tables_newobj(struct sk_buff *skb, const struct nfnl_info *info,
6585 const struct nlattr * const nla[])
6587 struct netlink_ext_ack *extack = info->extack;
6588 u8 genmask = nft_genmask_next(info->net);
6589 u8 family = info->nfmsg->nfgen_family;
6590 const struct nft_object_type *type;
6591 struct net *net = info->net;
6592 struct nft_table *table;
6593 struct nft_object *obj;
6598 if (!nla[NFTA_OBJ_TYPE] ||
6599 !nla[NFTA_OBJ_NAME] ||
6600 !nla[NFTA_OBJ_DATA])
6603 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
6604 NETLINK_CB(skb).portid);
6605 if (IS_ERR(table)) {
6606 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
6607 return PTR_ERR(table);
6610 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
6611 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
6614 if (err != -ENOENT) {
6615 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
6619 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
6620 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
6623 if (info->nlh->nlmsg_flags & NLM_F_REPLACE)
6626 type = __nft_obj_type_get(objtype);
6627 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6629 return nf_tables_updobj(&ctx, type, nla[NFTA_OBJ_DATA], obj);
6632 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6634 type = nft_obj_type_get(net, objtype);
6636 return PTR_ERR(type);
6638 obj = nft_obj_init(&ctx, type, nla[NFTA_OBJ_DATA]);
6643 obj->key.table = table;
6644 obj->handle = nf_tables_alloc_handle(table);
6646 obj->key.name = nla_strdup(nla[NFTA_OBJ_NAME], GFP_KERNEL);
6647 if (!obj->key.name) {
6652 if (nla[NFTA_OBJ_USERDATA]) {
6653 obj->udata = nla_memdup(nla[NFTA_OBJ_USERDATA], GFP_KERNEL);
6654 if (obj->udata == NULL)
6657 obj->udlen = nla_len(nla[NFTA_OBJ_USERDATA]);
6660 err = nft_trans_obj_add(&ctx, NFT_MSG_NEWOBJ, obj);
6664 err = rhltable_insert(&nft_objname_ht, &obj->rhlhead,
6665 nft_objname_ht_params);
6669 list_add_tail_rcu(&obj->list, &table->objects);
6673 /* queued in transaction log */
6674 INIT_LIST_HEAD(&obj->list);
6679 kfree(obj->key.name);
6681 if (obj->ops->destroy)
6682 obj->ops->destroy(&ctx, obj);
6685 module_put(type->owner);
6689 static int nf_tables_fill_obj_info(struct sk_buff *skb, struct net *net,
6690 u32 portid, u32 seq, int event, u32 flags,
6691 int family, const struct nft_table *table,
6692 struct nft_object *obj, bool reset)
6694 struct nlmsghdr *nlh;
6696 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
6697 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
6698 NFNETLINK_V0, nft_base_seq(net));
6700 goto nla_put_failure;
6702 if (nla_put_string(skb, NFTA_OBJ_TABLE, table->name) ||
6703 nla_put_string(skb, NFTA_OBJ_NAME, obj->key.name) ||
6704 nla_put_be32(skb, NFTA_OBJ_TYPE, htonl(obj->ops->type->type)) ||
6705 nla_put_be32(skb, NFTA_OBJ_USE, htonl(obj->use)) ||
6706 nft_object_dump(skb, NFTA_OBJ_DATA, obj, reset) ||
6707 nla_put_be64(skb, NFTA_OBJ_HANDLE, cpu_to_be64(obj->handle),
6709 goto nla_put_failure;
6712 nla_put(skb, NFTA_OBJ_USERDATA, obj->udlen, obj->udata))
6713 goto nla_put_failure;
6715 nlmsg_end(skb, nlh);
6719 nlmsg_trim(skb, nlh);
6723 struct nft_obj_filter {
6728 static int nf_tables_dump_obj(struct sk_buff *skb, struct netlink_callback *cb)
6730 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
6731 const struct nft_table *table;
6732 unsigned int idx = 0, s_idx = cb->args[0];
6733 struct nft_obj_filter *filter = cb->data;
6734 struct net *net = sock_net(skb->sk);
6735 int family = nfmsg->nfgen_family;
6736 struct nftables_pernet *nft_net;
6737 struct nft_object *obj;
6740 if (NFNL_MSG_TYPE(cb->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
6744 nft_net = nft_pernet(net);
6745 cb->seq = nft_net->base_seq;
6747 list_for_each_entry_rcu(table, &nft_net->tables, list) {
6748 if (family != NFPROTO_UNSPEC && family != table->family)
6751 list_for_each_entry_rcu(obj, &table->objects, list) {
6752 if (!nft_is_active(net, obj))
6757 memset(&cb->args[1], 0,
6758 sizeof(cb->args) - sizeof(cb->args[0]));
6759 if (filter && filter->table &&
6760 strcmp(filter->table, table->name))
6763 filter->type != NFT_OBJECT_UNSPEC &&
6764 obj->ops->type->type != filter->type)
6767 char *buf = kasprintf(GFP_ATOMIC,
6772 audit_log_nfcfg(buf,
6775 AUDIT_NFT_OP_OBJ_RESET,
6780 if (nf_tables_fill_obj_info(skb, net, NETLINK_CB(cb->skb).portid,
6783 NLM_F_MULTI | NLM_F_APPEND,
6784 table->family, table,
6788 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
6800 static int nf_tables_dump_obj_start(struct netlink_callback *cb)
6802 const struct nlattr * const *nla = cb->data;
6803 struct nft_obj_filter *filter = NULL;
6805 if (nla[NFTA_OBJ_TABLE] || nla[NFTA_OBJ_TYPE]) {
6806 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
6810 if (nla[NFTA_OBJ_TABLE]) {
6811 filter->table = nla_strdup(nla[NFTA_OBJ_TABLE], GFP_ATOMIC);
6812 if (!filter->table) {
6818 if (nla[NFTA_OBJ_TYPE])
6819 filter->type = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
6826 static int nf_tables_dump_obj_done(struct netlink_callback *cb)
6828 struct nft_obj_filter *filter = cb->data;
6831 kfree(filter->table);
6838 /* called with rcu_read_lock held */
6839 static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info,
6840 const struct nlattr * const nla[])
6842 struct netlink_ext_ack *extack = info->extack;
6843 u8 genmask = nft_genmask_cur(info->net);
6844 u8 family = info->nfmsg->nfgen_family;
6845 const struct nft_table *table;
6846 struct net *net = info->net;
6847 struct nft_object *obj;
6848 struct sk_buff *skb2;
6853 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
6854 struct netlink_dump_control c = {
6855 .start = nf_tables_dump_obj_start,
6856 .dump = nf_tables_dump_obj,
6857 .done = nf_tables_dump_obj_done,
6858 .module = THIS_MODULE,
6859 .data = (void *)nla,
6862 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
6865 if (!nla[NFTA_OBJ_NAME] ||
6866 !nla[NFTA_OBJ_TYPE])
6869 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0);
6870 if (IS_ERR(table)) {
6871 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
6872 return PTR_ERR(table);
6875 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
6876 obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask);
6878 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]);
6879 return PTR_ERR(obj);
6882 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
6886 if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET)
6890 const struct nftables_pernet *nft_net;
6893 nft_net = nft_pernet(net);
6894 buf = kasprintf(GFP_ATOMIC, "%s:%u", table->name, nft_net->base_seq);
6896 audit_log_nfcfg(buf,
6899 AUDIT_NFT_OP_OBJ_RESET,
6904 err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid,
6905 info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
6906 family, table, obj, reset);
6908 goto err_fill_obj_info;
6910 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
6917 static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj)
6919 if (obj->ops->destroy)
6920 obj->ops->destroy(ctx, obj);
6922 module_put(obj->ops->type->owner);
6923 kfree(obj->key.name);
6928 static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
6929 const struct nlattr * const nla[])
6931 struct netlink_ext_ack *extack = info->extack;
6932 u8 genmask = nft_genmask_next(info->net);
6933 u8 family = info->nfmsg->nfgen_family;
6934 struct net *net = info->net;
6935 const struct nlattr *attr;
6936 struct nft_table *table;
6937 struct nft_object *obj;
6941 if (!nla[NFTA_OBJ_TYPE] ||
6942 (!nla[NFTA_OBJ_NAME] && !nla[NFTA_OBJ_HANDLE]))
6945 table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask,
6946 NETLINK_CB(skb).portid);
6947 if (IS_ERR(table)) {
6948 NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]);
6949 return PTR_ERR(table);
6952 objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE]));
6953 if (nla[NFTA_OBJ_HANDLE]) {
6954 attr = nla[NFTA_OBJ_HANDLE];
6955 obj = nft_obj_lookup_byhandle(table, attr, objtype, genmask);
6957 attr = nla[NFTA_OBJ_NAME];
6958 obj = nft_obj_lookup(net, table, attr, objtype, genmask);
6962 NL_SET_BAD_ATTR(extack, attr);
6963 return PTR_ERR(obj);
6966 NL_SET_BAD_ATTR(extack, attr);
6970 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
6972 return nft_delobj(&ctx, obj);
6975 void nft_obj_notify(struct net *net, const struct nft_table *table,
6976 struct nft_object *obj, u32 portid, u32 seq, int event,
6977 u16 flags, int family, int report, gfp_t gfp)
6979 struct nftables_pernet *nft_net = nft_pernet(net);
6980 struct sk_buff *skb;
6982 char *buf = kasprintf(gfp, "%s:%u",
6983 table->name, nft_net->base_seq);
6985 audit_log_nfcfg(buf,
6988 event == NFT_MSG_NEWOBJ ?
6989 AUDIT_NFT_OP_OBJ_REGISTER :
6990 AUDIT_NFT_OP_OBJ_UNREGISTER,
6995 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
6998 skb = nlmsg_new(NLMSG_GOODSIZE, gfp);
7002 err = nf_tables_fill_obj_info(skb, net, portid, seq, event,
7003 flags & (NLM_F_CREATE | NLM_F_EXCL),
7004 family, table, obj, false);
7010 nft_notify_enqueue(skb, report, &nft_net->notify_list);
7013 nfnetlink_set_err(net, portid, NFNLGRP_NFTABLES, -ENOBUFS);
7015 EXPORT_SYMBOL_GPL(nft_obj_notify);
7017 static void nf_tables_obj_notify(const struct nft_ctx *ctx,
7018 struct nft_object *obj, int event)
7020 nft_obj_notify(ctx->net, ctx->table, obj, ctx->portid, ctx->seq, event,
7021 ctx->flags, ctx->family, ctx->report, GFP_KERNEL);
7027 void nft_register_flowtable_type(struct nf_flowtable_type *type)
7029 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7030 list_add_tail_rcu(&type->list, &nf_tables_flowtables);
7031 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7033 EXPORT_SYMBOL_GPL(nft_register_flowtable_type);
7035 void nft_unregister_flowtable_type(struct nf_flowtable_type *type)
7037 nfnl_lock(NFNL_SUBSYS_NFTABLES);
7038 list_del_rcu(&type->list);
7039 nfnl_unlock(NFNL_SUBSYS_NFTABLES);
7041 EXPORT_SYMBOL_GPL(nft_unregister_flowtable_type);
7043 static const struct nla_policy nft_flowtable_policy[NFTA_FLOWTABLE_MAX + 1] = {
7044 [NFTA_FLOWTABLE_TABLE] = { .type = NLA_STRING,
7045 .len = NFT_NAME_MAXLEN - 1 },
7046 [NFTA_FLOWTABLE_NAME] = { .type = NLA_STRING,
7047 .len = NFT_NAME_MAXLEN - 1 },
7048 [NFTA_FLOWTABLE_HOOK] = { .type = NLA_NESTED },
7049 [NFTA_FLOWTABLE_HANDLE] = { .type = NLA_U64 },
7050 [NFTA_FLOWTABLE_FLAGS] = { .type = NLA_U32 },
7053 struct nft_flowtable *nft_flowtable_lookup(const struct nft_table *table,
7054 const struct nlattr *nla, u8 genmask)
7056 struct nft_flowtable *flowtable;
7058 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
7059 if (!nla_strcmp(nla, flowtable->name) &&
7060 nft_active_genmask(flowtable, genmask))
7063 return ERR_PTR(-ENOENT);
7065 EXPORT_SYMBOL_GPL(nft_flowtable_lookup);
7067 void nf_tables_deactivate_flowtable(const struct nft_ctx *ctx,
7068 struct nft_flowtable *flowtable,
7069 enum nft_trans_phase phase)
7072 case NFT_TRANS_PREPARE:
7073 case NFT_TRANS_ABORT:
7074 case NFT_TRANS_RELEASE:
7081 EXPORT_SYMBOL_GPL(nf_tables_deactivate_flowtable);
7083 static struct nft_flowtable *
7084 nft_flowtable_lookup_byhandle(const struct nft_table *table,
7085 const struct nlattr *nla, u8 genmask)
7087 struct nft_flowtable *flowtable;
7089 list_for_each_entry(flowtable, &table->flowtables, list) {
7090 if (be64_to_cpu(nla_get_be64(nla)) == flowtable->handle &&
7091 nft_active_genmask(flowtable, genmask))
7094 return ERR_PTR(-ENOENT);
7097 struct nft_flowtable_hook {
7100 struct list_head list;
7103 static const struct nla_policy nft_flowtable_hook_policy[NFTA_FLOWTABLE_HOOK_MAX + 1] = {
7104 [NFTA_FLOWTABLE_HOOK_NUM] = { .type = NLA_U32 },
7105 [NFTA_FLOWTABLE_HOOK_PRIORITY] = { .type = NLA_U32 },
7106 [NFTA_FLOWTABLE_HOOK_DEVS] = { .type = NLA_NESTED },
7109 static int nft_flowtable_parse_hook(const struct nft_ctx *ctx,
7110 const struct nlattr *attr,
7111 struct nft_flowtable_hook *flowtable_hook,
7112 struct nft_flowtable *flowtable, bool add)
7114 struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1];
7115 struct nft_hook *hook;
7116 int hooknum, priority;
7119 INIT_LIST_HEAD(&flowtable_hook->list);
7121 err = nla_parse_nested_deprecated(tb, NFTA_FLOWTABLE_HOOK_MAX, attr,
7122 nft_flowtable_hook_policy, NULL);
7127 if (!tb[NFTA_FLOWTABLE_HOOK_NUM] ||
7128 !tb[NFTA_FLOWTABLE_HOOK_PRIORITY])
7131 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7132 if (hooknum != NF_NETDEV_INGRESS)
7135 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7137 flowtable_hook->priority = priority;
7138 flowtable_hook->num = hooknum;
7140 if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
7141 hooknum = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
7142 if (hooknum != flowtable->hooknum)
7146 if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
7147 priority = ntohl(nla_get_be32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
7148 if (priority != flowtable->data.priority)
7152 flowtable_hook->priority = flowtable->data.priority;
7153 flowtable_hook->num = flowtable->hooknum;
7156 if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
7157 err = nf_tables_parse_netdev_hooks(ctx->net,
7158 tb[NFTA_FLOWTABLE_HOOK_DEVS],
7159 &flowtable_hook->list);
7164 list_for_each_entry(hook, &flowtable_hook->list, list) {
7165 hook->ops.pf = NFPROTO_NETDEV;
7166 hook->ops.hooknum = flowtable_hook->num;
7167 hook->ops.priority = flowtable_hook->priority;
7168 hook->ops.priv = &flowtable->data;
7169 hook->ops.hook = flowtable->data.type->hook;
7175 static const struct nf_flowtable_type *__nft_flowtable_type_get(u8 family)
7177 const struct nf_flowtable_type *type;
7179 list_for_each_entry(type, &nf_tables_flowtables, list) {
7180 if (family == type->family)
7186 static const struct nf_flowtable_type *
7187 nft_flowtable_type_get(struct net *net, u8 family)
7189 const struct nf_flowtable_type *type;
7191 type = __nft_flowtable_type_get(family);
7192 if (type != NULL && try_module_get(type->owner))
7195 lockdep_nfnl_nft_mutex_not_held();
7196 #ifdef CONFIG_MODULES
7198 if (nft_request_module(net, "nf-flowtable-%u", family) == -EAGAIN)
7199 return ERR_PTR(-EAGAIN);
7202 return ERR_PTR(-ENOENT);
7205 /* Only called from error and netdev event paths. */
7206 static void nft_unregister_flowtable_hook(struct net *net,
7207 struct nft_flowtable *flowtable,
7208 struct nft_hook *hook)
7210 nf_unregister_net_hook(net, &hook->ops);
7211 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7215 static void nft_unregister_flowtable_net_hooks(struct net *net,
7216 struct list_head *hook_list)
7218 struct nft_hook *hook;
7220 list_for_each_entry(hook, hook_list, list)
7221 nf_unregister_net_hook(net, &hook->ops);
7224 static int nft_register_flowtable_net_hooks(struct net *net,
7225 struct nft_table *table,
7226 struct list_head *hook_list,
7227 struct nft_flowtable *flowtable)
7229 struct nft_hook *hook, *hook2, *next;
7230 struct nft_flowtable *ft;
7233 list_for_each_entry(hook, hook_list, list) {
7234 list_for_each_entry(ft, &table->flowtables, list) {
7235 if (!nft_is_active_next(net, ft))
7238 list_for_each_entry(hook2, &ft->hook_list, list) {
7239 if (hook->ops.dev == hook2->ops.dev &&
7240 hook->ops.pf == hook2->ops.pf) {
7242 goto err_unregister_net_hooks;
7247 err = flowtable->data.type->setup(&flowtable->data,
7251 goto err_unregister_net_hooks;
7253 err = nf_register_net_hook(net, &hook->ops);
7255 flowtable->data.type->setup(&flowtable->data,
7258 goto err_unregister_net_hooks;
7266 err_unregister_net_hooks:
7267 list_for_each_entry_safe(hook, next, hook_list, list) {
7271 nft_unregister_flowtable_hook(net, flowtable, hook);
7272 list_del_rcu(&hook->list);
7273 kfree_rcu(hook, rcu);
7279 static void nft_flowtable_hooks_destroy(struct list_head *hook_list)
7281 struct nft_hook *hook, *next;
7283 list_for_each_entry_safe(hook, next, hook_list, list) {
7284 list_del_rcu(&hook->list);
7285 kfree_rcu(hook, rcu);
7289 static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,
7290 struct nft_flowtable *flowtable)
7292 const struct nlattr * const *nla = ctx->nla;
7293 struct nft_flowtable_hook flowtable_hook;
7294 struct nft_hook *hook, *next;
7295 struct nft_trans *trans;
7296 bool unregister = false;
7300 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
7301 &flowtable_hook, flowtable, false);
7305 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7306 if (nft_hook_list_find(&flowtable->hook_list, hook)) {
7307 list_del(&hook->list);
7312 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7313 flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7314 if (flags & ~NFT_FLOWTABLE_MASK)
7316 if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^
7317 (flags & NFT_FLOWTABLE_HW_OFFLOAD))
7320 flags = flowtable->data.flags;
7323 err = nft_register_flowtable_net_hooks(ctx->net, ctx->table,
7324 &flowtable_hook.list, flowtable);
7326 goto err_flowtable_update_hook;
7328 trans = nft_trans_alloc(ctx, NFT_MSG_NEWFLOWTABLE,
7329 sizeof(struct nft_trans_flowtable));
7333 goto err_flowtable_update_hook;
7336 nft_trans_flowtable_flags(trans) = flags;
7337 nft_trans_flowtable(trans) = flowtable;
7338 nft_trans_flowtable_update(trans) = true;
7339 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7340 list_splice(&flowtable_hook.list, &nft_trans_flowtable_hooks(trans));
7342 nft_trans_commit_list_add_tail(ctx->net, trans);
7346 err_flowtable_update_hook:
7347 list_for_each_entry_safe(hook, next, &flowtable_hook.list, list) {
7349 nft_unregister_flowtable_hook(ctx->net, flowtable, hook);
7350 list_del_rcu(&hook->list);
7351 kfree_rcu(hook, rcu);
7358 static int nf_tables_newflowtable(struct sk_buff *skb,
7359 const struct nfnl_info *info,
7360 const struct nlattr * const nla[])
7362 struct netlink_ext_ack *extack = info->extack;
7363 struct nft_flowtable_hook flowtable_hook;
7364 u8 genmask = nft_genmask_next(info->net);
7365 u8 family = info->nfmsg->nfgen_family;
7366 const struct nf_flowtable_type *type;
7367 struct nft_flowtable *flowtable;
7368 struct nft_hook *hook, *next;
7369 struct net *net = info->net;
7370 struct nft_table *table;
7374 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7375 !nla[NFTA_FLOWTABLE_NAME] ||
7376 !nla[NFTA_FLOWTABLE_HOOK])
7379 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
7380 genmask, NETLINK_CB(skb).portid);
7381 if (IS_ERR(table)) {
7382 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
7383 return PTR_ERR(table);
7386 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
7388 if (IS_ERR(flowtable)) {
7389 err = PTR_ERR(flowtable);
7390 if (err != -ENOENT) {
7391 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
7395 if (info->nlh->nlmsg_flags & NLM_F_EXCL) {
7396 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_NAME]);
7400 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7402 return nft_flowtable_update(&ctx, info->nlh, flowtable);
7405 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7407 flowtable = kzalloc(sizeof(*flowtable), GFP_KERNEL);
7411 flowtable->table = table;
7412 flowtable->handle = nf_tables_alloc_handle(table);
7413 INIT_LIST_HEAD(&flowtable->hook_list);
7415 flowtable->name = nla_strdup(nla[NFTA_FLOWTABLE_NAME], GFP_KERNEL);
7416 if (!flowtable->name) {
7421 type = nft_flowtable_type_get(net, family);
7423 err = PTR_ERR(type);
7427 if (nla[NFTA_FLOWTABLE_FLAGS]) {
7428 flowtable->data.flags =
7429 ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS]));
7430 if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) {
7436 write_pnet(&flowtable->data.net, net);
7437 flowtable->data.type = type;
7438 err = type->init(&flowtable->data);
7442 err = nft_flowtable_parse_hook(&ctx, nla[NFTA_FLOWTABLE_HOOK],
7443 &flowtable_hook, flowtable, true);
7447 list_splice(&flowtable_hook.list, &flowtable->hook_list);
7448 flowtable->data.priority = flowtable_hook.priority;
7449 flowtable->hooknum = flowtable_hook.num;
7451 err = nft_register_flowtable_net_hooks(ctx.net, table,
7452 &flowtable->hook_list,
7455 nft_flowtable_hooks_destroy(&flowtable->hook_list);
7459 err = nft_trans_flowtable_add(&ctx, NFT_MSG_NEWFLOWTABLE, flowtable);
7463 list_add_tail_rcu(&flowtable->list, &table->flowtables);
7468 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
7469 nft_unregister_flowtable_hook(net, flowtable, hook);
7470 list_del_rcu(&hook->list);
7471 kfree_rcu(hook, rcu);
7474 flowtable->data.type->free(&flowtable->data);
7476 module_put(type->owner);
7478 kfree(flowtable->name);
7484 static void nft_flowtable_hook_release(struct nft_flowtable_hook *flowtable_hook)
7486 struct nft_hook *this, *next;
7488 list_for_each_entry_safe(this, next, &flowtable_hook->list, list) {
7489 list_del(&this->list);
7494 static int nft_delflowtable_hook(struct nft_ctx *ctx,
7495 struct nft_flowtable *flowtable)
7497 const struct nlattr * const *nla = ctx->nla;
7498 struct nft_flowtable_hook flowtable_hook;
7499 struct nft_hook *this, *hook;
7500 struct nft_trans *trans;
7503 err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK],
7504 &flowtable_hook, flowtable, false);
7508 list_for_each_entry(this, &flowtable_hook.list, list) {
7509 hook = nft_hook_list_find(&flowtable->hook_list, this);
7512 goto err_flowtable_del_hook;
7514 hook->inactive = true;
7517 trans = nft_trans_alloc(ctx, NFT_MSG_DELFLOWTABLE,
7518 sizeof(struct nft_trans_flowtable));
7521 goto err_flowtable_del_hook;
7524 nft_trans_flowtable(trans) = flowtable;
7525 nft_trans_flowtable_update(trans) = true;
7526 INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans));
7527 nft_flowtable_hook_release(&flowtable_hook);
7529 nft_trans_commit_list_add_tail(ctx->net, trans);
7533 err_flowtable_del_hook:
7534 list_for_each_entry(this, &flowtable_hook.list, list) {
7535 hook = nft_hook_list_find(&flowtable->hook_list, this);
7539 hook->inactive = false;
7541 nft_flowtable_hook_release(&flowtable_hook);
7546 static int nf_tables_delflowtable(struct sk_buff *skb,
7547 const struct nfnl_info *info,
7548 const struct nlattr * const nla[])
7550 struct netlink_ext_ack *extack = info->extack;
7551 u8 genmask = nft_genmask_next(info->net);
7552 u8 family = info->nfmsg->nfgen_family;
7553 struct nft_flowtable *flowtable;
7554 struct net *net = info->net;
7555 const struct nlattr *attr;
7556 struct nft_table *table;
7559 if (!nla[NFTA_FLOWTABLE_TABLE] ||
7560 (!nla[NFTA_FLOWTABLE_NAME] &&
7561 !nla[NFTA_FLOWTABLE_HANDLE]))
7564 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
7565 genmask, NETLINK_CB(skb).portid);
7566 if (IS_ERR(table)) {
7567 NL_SET_BAD_ATTR(extack, nla[NFTA_FLOWTABLE_TABLE]);
7568 return PTR_ERR(table);
7571 if (nla[NFTA_FLOWTABLE_HANDLE]) {
7572 attr = nla[NFTA_FLOWTABLE_HANDLE];
7573 flowtable = nft_flowtable_lookup_byhandle(table, attr, genmask);
7575 attr = nla[NFTA_FLOWTABLE_NAME];
7576 flowtable = nft_flowtable_lookup(table, attr, genmask);
7579 if (IS_ERR(flowtable)) {
7580 NL_SET_BAD_ATTR(extack, attr);
7581 return PTR_ERR(flowtable);
7584 nft_ctx_init(&ctx, net, skb, info->nlh, family, table, NULL, nla);
7586 if (nla[NFTA_FLOWTABLE_HOOK])
7587 return nft_delflowtable_hook(&ctx, flowtable);
7589 if (flowtable->use > 0) {
7590 NL_SET_BAD_ATTR(extack, attr);
7594 return nft_delflowtable(&ctx, flowtable);
7597 static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
7598 u32 portid, u32 seq, int event,
7599 u32 flags, int family,
7600 struct nft_flowtable *flowtable,
7601 struct list_head *hook_list)
7603 struct nlattr *nest, *nest_devs;
7604 struct nft_hook *hook;
7605 struct nlmsghdr *nlh;
7607 event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, event);
7608 nlh = nfnl_msg_put(skb, portid, seq, event, flags, family,
7609 NFNETLINK_V0, nft_base_seq(net));
7611 goto nla_put_failure;
7613 if (nla_put_string(skb, NFTA_FLOWTABLE_TABLE, flowtable->table->name) ||
7614 nla_put_string(skb, NFTA_FLOWTABLE_NAME, flowtable->name) ||
7615 nla_put_be32(skb, NFTA_FLOWTABLE_USE, htonl(flowtable->use)) ||
7616 nla_put_be64(skb, NFTA_FLOWTABLE_HANDLE, cpu_to_be64(flowtable->handle),
7617 NFTA_FLOWTABLE_PAD) ||
7618 nla_put_be32(skb, NFTA_FLOWTABLE_FLAGS, htonl(flowtable->data.flags)))
7619 goto nla_put_failure;
7621 nest = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK);
7623 goto nla_put_failure;
7624 if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
7625 nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->data.priority)))
7626 goto nla_put_failure;
7628 nest_devs = nla_nest_start_noflag(skb, NFTA_FLOWTABLE_HOOK_DEVS);
7630 goto nla_put_failure;
7632 list_for_each_entry_rcu(hook, hook_list, list) {
7633 if (nla_put_string(skb, NFTA_DEVICE_NAME, hook->ops.dev->name))
7634 goto nla_put_failure;
7636 nla_nest_end(skb, nest_devs);
7637 nla_nest_end(skb, nest);
7639 nlmsg_end(skb, nlh);
7643 nlmsg_trim(skb, nlh);
7647 struct nft_flowtable_filter {
7651 static int nf_tables_dump_flowtable(struct sk_buff *skb,
7652 struct netlink_callback *cb)
7654 const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
7655 struct nft_flowtable_filter *filter = cb->data;
7656 unsigned int idx = 0, s_idx = cb->args[0];
7657 struct net *net = sock_net(skb->sk);
7658 int family = nfmsg->nfgen_family;
7659 struct nft_flowtable *flowtable;
7660 struct nftables_pernet *nft_net;
7661 const struct nft_table *table;
7664 nft_net = nft_pernet(net);
7665 cb->seq = nft_net->base_seq;
7667 list_for_each_entry_rcu(table, &nft_net->tables, list) {
7668 if (family != NFPROTO_UNSPEC && family != table->family)
7671 list_for_each_entry_rcu(flowtable, &table->flowtables, list) {
7672 if (!nft_is_active(net, flowtable))
7677 memset(&cb->args[1], 0,
7678 sizeof(cb->args) - sizeof(cb->args[0]));
7679 if (filter && filter->table &&
7680 strcmp(filter->table, table->name))
7683 if (nf_tables_fill_flowtable_info(skb, net, NETLINK_CB(cb->skb).portid,
7685 NFT_MSG_NEWFLOWTABLE,
7686 NLM_F_MULTI | NLM_F_APPEND,
7689 &flowtable->hook_list) < 0)
7692 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
7704 static int nf_tables_dump_flowtable_start(struct netlink_callback *cb)
7706 const struct nlattr * const *nla = cb->data;
7707 struct nft_flowtable_filter *filter = NULL;
7709 if (nla[NFTA_FLOWTABLE_TABLE]) {
7710 filter = kzalloc(sizeof(*filter), GFP_ATOMIC);
7714 filter->table = nla_strdup(nla[NFTA_FLOWTABLE_TABLE],
7716 if (!filter->table) {
7726 static int nf_tables_dump_flowtable_done(struct netlink_callback *cb)
7728 struct nft_flowtable_filter *filter = cb->data;
7733 kfree(filter->table);
7739 /* called with rcu_read_lock held */
7740 static int nf_tables_getflowtable(struct sk_buff *skb,
7741 const struct nfnl_info *info,
7742 const struct nlattr * const nla[])
7744 u8 genmask = nft_genmask_cur(info->net);
7745 u8 family = info->nfmsg->nfgen_family;
7746 struct nft_flowtable *flowtable;
7747 const struct nft_table *table;
7748 struct net *net = info->net;
7749 struct sk_buff *skb2;
7752 if (info->nlh->nlmsg_flags & NLM_F_DUMP) {
7753 struct netlink_dump_control c = {
7754 .start = nf_tables_dump_flowtable_start,
7755 .dump = nf_tables_dump_flowtable,
7756 .done = nf_tables_dump_flowtable_done,
7757 .module = THIS_MODULE,
7758 .data = (void *)nla,
7761 return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c);
7764 if (!nla[NFTA_FLOWTABLE_NAME])
7767 table = nft_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE], family,
7770 return PTR_ERR(table);
7772 flowtable = nft_flowtable_lookup(table, nla[NFTA_FLOWTABLE_NAME],
7774 if (IS_ERR(flowtable))
7775 return PTR_ERR(flowtable);
7777 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
7781 err = nf_tables_fill_flowtable_info(skb2, net, NETLINK_CB(skb).portid,
7782 info->nlh->nlmsg_seq,
7783 NFT_MSG_NEWFLOWTABLE, 0, family,
7784 flowtable, &flowtable->hook_list);
7786 goto err_fill_flowtable_info;
7788 return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
7790 err_fill_flowtable_info:
7795 static void nf_tables_flowtable_notify(struct nft_ctx *ctx,
7796 struct nft_flowtable *flowtable,
7797 struct list_head *hook_list,
7800 struct nftables_pernet *nft_net = nft_pernet(ctx->net);
7801 struct sk_buff *skb;
7806 !nfnetlink_has_listeners(ctx->net, NFNLGRP_NFTABLES))
7809 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7813 if (ctx->flags & (NLM_F_CREATE | NLM_F_EXCL))
7814 flags |= ctx->flags & (NLM_F_CREATE | NLM_F_EXCL);
7816 err = nf_tables_fill_flowtable_info(skb, ctx->net, ctx->portid,
7817 ctx->seq, event, flags,
7818 ctx->family, flowtable, hook_list);
7824 nft_notify_enqueue(skb, ctx->report, &nft_net->notify_list);
7827 nfnetlink_set_err(ctx->net, ctx->portid, NFNLGRP_NFTABLES, -ENOBUFS);
7830 static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)
7832 struct nft_hook *hook, *next;
7834 flowtable->data.type->free(&flowtable->data);
7835 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
7836 flowtable->data.type->setup(&flowtable->data, hook->ops.dev,
7838 list_del_rcu(&hook->list);
7841 kfree(flowtable->name);
7842 module_put(flowtable->data.type->owner);
7846 static int nf_tables_fill_gen_info(struct sk_buff *skb, struct net *net,
7847 u32 portid, u32 seq)
7849 struct nftables_pernet *nft_net = nft_pernet(net);
7850 struct nlmsghdr *nlh;
7851 char buf[TASK_COMM_LEN];
7852 int event = nfnl_msg_type(NFNL_SUBSYS_NFTABLES, NFT_MSG_NEWGEN);
7854 nlh = nfnl_msg_put(skb, portid, seq, event, 0, AF_UNSPEC,
7855 NFNETLINK_V0, nft_base_seq(net));
7857 goto nla_put_failure;
7859 if (nla_put_be32(skb, NFTA_GEN_ID, htonl(nft_net->base_seq)) ||
7860 nla_put_be32(skb, NFTA_GEN_PROC_PID, htonl(task_pid_nr(current))) ||
7861 nla_put_string(skb, NFTA_GEN_PROC_NAME, get_task_comm(buf, current)))
7862 goto nla_put_failure;
7864 nlmsg_end(skb, nlh);
7868 nlmsg_trim(skb, nlh);
7872 static void nft_flowtable_event(unsigned long event, struct net_device *dev,
7873 struct nft_flowtable *flowtable)
7875 struct nft_hook *hook;
7877 list_for_each_entry(hook, &flowtable->hook_list, list) {
7878 if (hook->ops.dev != dev)
7881 /* flow_offload_netdev_event() cleans up entries for us. */
7882 nft_unregister_flowtable_hook(dev_net(dev), flowtable, hook);
7883 list_del_rcu(&hook->list);
7884 kfree_rcu(hook, rcu);
7889 static int nf_tables_flowtable_event(struct notifier_block *this,
7890 unsigned long event, void *ptr)
7892 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7893 struct nft_flowtable *flowtable;
7894 struct nftables_pernet *nft_net;
7895 struct nft_table *table;
7898 if (event != NETDEV_UNREGISTER)
7902 nft_net = nft_pernet(net);
7903 mutex_lock(&nft_net->commit_mutex);
7904 list_for_each_entry(table, &nft_net->tables, list) {
7905 list_for_each_entry(flowtable, &table->flowtables, list) {
7906 nft_flowtable_event(event, dev, flowtable);
7909 mutex_unlock(&nft_net->commit_mutex);
7914 static struct notifier_block nf_tables_flowtable_notifier = {
7915 .notifier_call = nf_tables_flowtable_event,
7918 static void nf_tables_gen_notify(struct net *net, struct sk_buff *skb,
7921 struct nlmsghdr *nlh = nlmsg_hdr(skb);
7922 struct sk_buff *skb2;
7925 if (!nlmsg_report(nlh) &&
7926 !nfnetlink_has_listeners(net, NFNLGRP_NFTABLES))
7929 skb2 = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7933 err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
7940 nfnetlink_send(skb2, net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
7941 nlmsg_report(nlh), GFP_KERNEL);
7944 nfnetlink_set_err(net, NETLINK_CB(skb).portid, NFNLGRP_NFTABLES,
7948 static int nf_tables_getgen(struct sk_buff *skb, const struct nfnl_info *info,
7949 const struct nlattr * const nla[])
7951 struct sk_buff *skb2;
7954 skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
7958 err = nf_tables_fill_gen_info(skb2, info->net, NETLINK_CB(skb).portid,
7959 info->nlh->nlmsg_seq);
7961 goto err_fill_gen_info;
7963 return nfnetlink_unicast(skb2, info->net, NETLINK_CB(skb).portid);
7970 static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
7971 [NFT_MSG_NEWTABLE] = {
7972 .call = nf_tables_newtable,
7973 .type = NFNL_CB_BATCH,
7974 .attr_count = NFTA_TABLE_MAX,
7975 .policy = nft_table_policy,
7977 [NFT_MSG_GETTABLE] = {
7978 .call = nf_tables_gettable,
7979 .type = NFNL_CB_RCU,
7980 .attr_count = NFTA_TABLE_MAX,
7981 .policy = nft_table_policy,
7983 [NFT_MSG_DELTABLE] = {
7984 .call = nf_tables_deltable,
7985 .type = NFNL_CB_BATCH,
7986 .attr_count = NFTA_TABLE_MAX,
7987 .policy = nft_table_policy,
7989 [NFT_MSG_NEWCHAIN] = {
7990 .call = nf_tables_newchain,
7991 .type = NFNL_CB_BATCH,
7992 .attr_count = NFTA_CHAIN_MAX,
7993 .policy = nft_chain_policy,
7995 [NFT_MSG_GETCHAIN] = {
7996 .call = nf_tables_getchain,
7997 .type = NFNL_CB_RCU,
7998 .attr_count = NFTA_CHAIN_MAX,
7999 .policy = nft_chain_policy,
8001 [NFT_MSG_DELCHAIN] = {
8002 .call = nf_tables_delchain,
8003 .type = NFNL_CB_BATCH,
8004 .attr_count = NFTA_CHAIN_MAX,
8005 .policy = nft_chain_policy,
8007 [NFT_MSG_NEWRULE] = {
8008 .call = nf_tables_newrule,
8009 .type = NFNL_CB_BATCH,
8010 .attr_count = NFTA_RULE_MAX,
8011 .policy = nft_rule_policy,
8013 [NFT_MSG_GETRULE] = {
8014 .call = nf_tables_getrule,
8015 .type = NFNL_CB_RCU,
8016 .attr_count = NFTA_RULE_MAX,
8017 .policy = nft_rule_policy,
8019 [NFT_MSG_DELRULE] = {
8020 .call = nf_tables_delrule,
8021 .type = NFNL_CB_BATCH,
8022 .attr_count = NFTA_RULE_MAX,
8023 .policy = nft_rule_policy,
8025 [NFT_MSG_NEWSET] = {
8026 .call = nf_tables_newset,
8027 .type = NFNL_CB_BATCH,
8028 .attr_count = NFTA_SET_MAX,
8029 .policy = nft_set_policy,
8031 [NFT_MSG_GETSET] = {
8032 .call = nf_tables_getset,
8033 .type = NFNL_CB_RCU,
8034 .attr_count = NFTA_SET_MAX,
8035 .policy = nft_set_policy,
8037 [NFT_MSG_DELSET] = {
8038 .call = nf_tables_delset,
8039 .type = NFNL_CB_BATCH,
8040 .attr_count = NFTA_SET_MAX,
8041 .policy = nft_set_policy,
8043 [NFT_MSG_NEWSETELEM] = {
8044 .call = nf_tables_newsetelem,
8045 .type = NFNL_CB_BATCH,
8046 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8047 .policy = nft_set_elem_list_policy,
8049 [NFT_MSG_GETSETELEM] = {
8050 .call = nf_tables_getsetelem,
8051 .type = NFNL_CB_RCU,
8052 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8053 .policy = nft_set_elem_list_policy,
8055 [NFT_MSG_DELSETELEM] = {
8056 .call = nf_tables_delsetelem,
8057 .type = NFNL_CB_BATCH,
8058 .attr_count = NFTA_SET_ELEM_LIST_MAX,
8059 .policy = nft_set_elem_list_policy,
8061 [NFT_MSG_GETGEN] = {
8062 .call = nf_tables_getgen,
8063 .type = NFNL_CB_RCU,
8065 [NFT_MSG_NEWOBJ] = {
8066 .call = nf_tables_newobj,
8067 .type = NFNL_CB_BATCH,
8068 .attr_count = NFTA_OBJ_MAX,
8069 .policy = nft_obj_policy,
8071 [NFT_MSG_GETOBJ] = {
8072 .call = nf_tables_getobj,
8073 .type = NFNL_CB_RCU,
8074 .attr_count = NFTA_OBJ_MAX,
8075 .policy = nft_obj_policy,
8077 [NFT_MSG_DELOBJ] = {
8078 .call = nf_tables_delobj,
8079 .type = NFNL_CB_BATCH,
8080 .attr_count = NFTA_OBJ_MAX,
8081 .policy = nft_obj_policy,
8083 [NFT_MSG_GETOBJ_RESET] = {
8084 .call = nf_tables_getobj,
8085 .type = NFNL_CB_RCU,
8086 .attr_count = NFTA_OBJ_MAX,
8087 .policy = nft_obj_policy,
8089 [NFT_MSG_NEWFLOWTABLE] = {
8090 .call = nf_tables_newflowtable,
8091 .type = NFNL_CB_BATCH,
8092 .attr_count = NFTA_FLOWTABLE_MAX,
8093 .policy = nft_flowtable_policy,
8095 [NFT_MSG_GETFLOWTABLE] = {
8096 .call = nf_tables_getflowtable,
8097 .type = NFNL_CB_RCU,
8098 .attr_count = NFTA_FLOWTABLE_MAX,
8099 .policy = nft_flowtable_policy,
8101 [NFT_MSG_DELFLOWTABLE] = {
8102 .call = nf_tables_delflowtable,
8103 .type = NFNL_CB_BATCH,
8104 .attr_count = NFTA_FLOWTABLE_MAX,
8105 .policy = nft_flowtable_policy,
8109 static int nf_tables_validate(struct net *net)
8111 struct nftables_pernet *nft_net = nft_pernet(net);
8112 struct nft_table *table;
8114 switch (nft_net->validate_state) {
8115 case NFT_VALIDATE_SKIP:
8117 case NFT_VALIDATE_NEED:
8118 nft_validate_state_update(net, NFT_VALIDATE_DO);
8120 case NFT_VALIDATE_DO:
8121 list_for_each_entry(table, &nft_net->tables, list) {
8122 if (nft_table_validate(net, table) < 0)
8131 /* a drop policy has to be deferred until all rules have been activated,
8132 * otherwise a large ruleset that contains a drop-policy base chain will
8133 * cause all packets to get dropped until the full transaction has been
8136 * We defer the drop policy until the transaction has been finalized.
8138 static void nft_chain_commit_drop_policy(struct nft_trans *trans)
8140 struct nft_base_chain *basechain;
8142 if (nft_trans_chain_policy(trans) != NF_DROP)
8145 if (!nft_is_base_chain(trans->ctx.chain))
8148 basechain = nft_base_chain(trans->ctx.chain);
8149 basechain->policy = NF_DROP;
8152 static void nft_chain_commit_update(struct nft_trans *trans)
8154 struct nft_base_chain *basechain;
8156 if (nft_trans_chain_name(trans)) {
8157 rhltable_remove(&trans->ctx.table->chains_ht,
8158 &trans->ctx.chain->rhlhead,
8159 nft_chain_ht_params);
8160 swap(trans->ctx.chain->name, nft_trans_chain_name(trans));
8161 rhltable_insert_key(&trans->ctx.table->chains_ht,
8162 trans->ctx.chain->name,
8163 &trans->ctx.chain->rhlhead,
8164 nft_chain_ht_params);
8167 if (!nft_is_base_chain(trans->ctx.chain))
8170 nft_chain_stats_replace(trans);
8172 basechain = nft_base_chain(trans->ctx.chain);
8174 switch (nft_trans_chain_policy(trans)) {
8177 basechain->policy = nft_trans_chain_policy(trans);
8182 static void nft_obj_commit_update(struct nft_trans *trans)
8184 struct nft_object *newobj;
8185 struct nft_object *obj;
8187 obj = nft_trans_obj(trans);
8188 newobj = nft_trans_obj_newobj(trans);
8190 if (obj->ops->update)
8191 obj->ops->update(obj, newobj);
8193 nft_obj_destroy(&trans->ctx, newobj);
8196 static void nft_commit_release(struct nft_trans *trans)
8198 switch (trans->msg_type) {
8199 case NFT_MSG_DELTABLE:
8200 nf_tables_table_destroy(&trans->ctx);
8202 case NFT_MSG_NEWCHAIN:
8203 free_percpu(nft_trans_chain_stats(trans));
8204 kfree(nft_trans_chain_name(trans));
8206 case NFT_MSG_DELCHAIN:
8207 nf_tables_chain_destroy(&trans->ctx);
8209 case NFT_MSG_DELRULE:
8210 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8212 case NFT_MSG_DELSET:
8213 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
8215 case NFT_MSG_DELSETELEM:
8216 nf_tables_set_elem_destroy(&trans->ctx,
8217 nft_trans_elem_set(trans),
8218 nft_trans_elem(trans).priv);
8220 case NFT_MSG_DELOBJ:
8221 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
8223 case NFT_MSG_DELFLOWTABLE:
8224 if (nft_trans_flowtable_update(trans))
8225 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
8227 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
8232 put_net(trans->ctx.net);
8237 static void nf_tables_trans_destroy_work(struct work_struct *w)
8239 struct nft_trans *trans, *next;
8242 spin_lock(&nf_tables_destroy_list_lock);
8243 list_splice_init(&nf_tables_destroy_list, &head);
8244 spin_unlock(&nf_tables_destroy_list_lock);
8246 if (list_empty(&head))
8251 list_for_each_entry_safe(trans, next, &head, list) {
8252 list_del(&trans->list);
8253 nft_commit_release(trans);
8257 void nf_tables_trans_destroy_flush_work(void)
8259 flush_work(&trans_destroy_work);
8261 EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
8263 static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
8265 const struct nft_expr *expr, *last;
8266 struct nft_regs_track track = {};
8267 unsigned int size, data_size;
8268 void *data, *data_boundary;
8269 struct nft_rule_dp *prule;
8270 struct nft_rule *rule;
8272 /* already handled or inactive chain? */
8273 if (chain->blob_next || !nft_is_active_next(net, chain))
8276 rule = list_entry(&chain->rules, struct nft_rule, list);
8279 list_for_each_entry_continue(rule, &chain->rules, list) {
8280 if (nft_is_active_next(net, rule)) {
8281 data_size += sizeof(*prule) + rule->dlen;
8282 if (data_size > INT_MAX)
8286 data_size += offsetof(struct nft_rule_dp, data); /* last rule */
8288 chain->blob_next = nf_tables_chain_alloc_rules(data_size);
8289 if (!chain->blob_next)
8292 data = (void *)chain->blob_next->data;
8293 data_boundary = data + data_size;
8296 list_for_each_entry_continue(rule, &chain->rules, list) {
8297 if (!nft_is_active_next(net, rule))
8300 prule = (struct nft_rule_dp *)data;
8301 data += offsetof(struct nft_rule_dp, data);
8302 if (WARN_ON_ONCE(data > data_boundary))
8306 track.last = nft_expr_last(rule);
8307 nft_rule_for_each_expr(expr, last, rule) {
8310 if (expr->ops->reduce &&
8311 expr->ops->reduce(&track, expr)) {
8316 if (WARN_ON_ONCE(data + expr->ops->size > data_boundary))
8319 memcpy(data + size, expr, expr->ops->size);
8320 size += expr->ops->size;
8322 if (WARN_ON_ONCE(size >= 1 << 12))
8325 prule->handle = rule->handle;
8331 chain->blob_next->size += (unsigned long)(data - (void *)prule);
8334 prule = (struct nft_rule_dp *)data;
8335 data += offsetof(struct nft_rule_dp, data);
8336 if (WARN_ON_ONCE(data > data_boundary))
8339 nft_last_rule(chain->blob_next, prule);
8344 static void nf_tables_commit_chain_prepare_cancel(struct net *net)
8346 struct nftables_pernet *nft_net = nft_pernet(net);
8347 struct nft_trans *trans, *next;
8349 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
8350 struct nft_chain *chain = trans->ctx.chain;
8352 if (trans->msg_type == NFT_MSG_NEWRULE ||
8353 trans->msg_type == NFT_MSG_DELRULE) {
8354 kvfree(chain->blob_next);
8355 chain->blob_next = NULL;
8360 static void __nf_tables_commit_chain_free_rules_old(struct rcu_head *h)
8362 struct nft_rules_old *o = container_of(h, struct nft_rules_old, h);
8367 static void nf_tables_commit_chain_free_rules_old(struct nft_rule_blob *blob)
8369 struct nft_rules_old *old;
8371 /* rcu_head is after end marker */
8372 old = (void *)blob + sizeof(*blob) + blob->size;
8375 call_rcu(&old->h, __nf_tables_commit_chain_free_rules_old);
8378 static void nf_tables_commit_chain(struct net *net, struct nft_chain *chain)
8380 struct nft_rule_blob *g0, *g1;
8383 next_genbit = nft_gencursor_next(net);
8385 g0 = rcu_dereference_protected(chain->blob_gen_0,
8386 lockdep_commit_lock_is_held(net));
8387 g1 = rcu_dereference_protected(chain->blob_gen_1,
8388 lockdep_commit_lock_is_held(net));
8390 /* No changes to this chain? */
8391 if (chain->blob_next == NULL) {
8392 /* chain had no change in last or next generation */
8396 * chain had no change in this generation; make sure next
8397 * one uses same rules as current generation.
8400 rcu_assign_pointer(chain->blob_gen_1, g0);
8401 nf_tables_commit_chain_free_rules_old(g1);
8403 rcu_assign_pointer(chain->blob_gen_0, g1);
8404 nf_tables_commit_chain_free_rules_old(g0);
8411 rcu_assign_pointer(chain->blob_gen_1, chain->blob_next);
8413 rcu_assign_pointer(chain->blob_gen_0, chain->blob_next);
8415 chain->blob_next = NULL;
8421 nf_tables_commit_chain_free_rules_old(g1);
8423 nf_tables_commit_chain_free_rules_old(g0);
8426 static void nft_obj_del(struct nft_object *obj)
8428 rhltable_remove(&nft_objname_ht, &obj->rhlhead, nft_objname_ht_params);
8429 list_del_rcu(&obj->list);
8432 void nft_chain_del(struct nft_chain *chain)
8434 struct nft_table *table = chain->table;
8436 WARN_ON_ONCE(rhltable_remove(&table->chains_ht, &chain->rhlhead,
8437 nft_chain_ht_params));
8438 list_del_rcu(&chain->list);
8441 static void nft_flowtable_hooks_del(struct nft_flowtable *flowtable,
8442 struct list_head *hook_list)
8444 struct nft_hook *hook, *next;
8446 list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {
8448 list_move(&hook->list, hook_list);
8452 static void nf_tables_module_autoload_cleanup(struct net *net)
8454 struct nftables_pernet *nft_net = nft_pernet(net);
8455 struct nft_module_request *req, *next;
8457 WARN_ON_ONCE(!list_empty(&nft_net->commit_list));
8458 list_for_each_entry_safe(req, next, &nft_net->module_list, list) {
8459 WARN_ON_ONCE(!req->done);
8460 list_del(&req->list);
8465 static void nf_tables_commit_release(struct net *net)
8467 struct nftables_pernet *nft_net = nft_pernet(net);
8468 struct nft_trans *trans;
8470 /* all side effects have to be made visible.
8471 * For example, if a chain named 'foo' has been deleted, a
8472 * new transaction must not find it anymore.
8474 * Memory reclaim happens asynchronously from work queue
8475 * to prevent expensive synchronize_rcu() in commit phase.
8477 if (list_empty(&nft_net->commit_list)) {
8478 nf_tables_module_autoload_cleanup(net);
8479 mutex_unlock(&nft_net->commit_mutex);
8483 trans = list_last_entry(&nft_net->commit_list,
8484 struct nft_trans, list);
8485 get_net(trans->ctx.net);
8486 WARN_ON_ONCE(trans->put_net);
8488 trans->put_net = true;
8489 spin_lock(&nf_tables_destroy_list_lock);
8490 list_splice_tail_init(&nft_net->commit_list, &nf_tables_destroy_list);
8491 spin_unlock(&nf_tables_destroy_list_lock);
8493 nf_tables_module_autoload_cleanup(net);
8494 schedule_work(&trans_destroy_work);
8496 mutex_unlock(&nft_net->commit_mutex);
8499 static void nft_commit_notify(struct net *net, u32 portid)
8501 struct nftables_pernet *nft_net = nft_pernet(net);
8502 struct sk_buff *batch_skb = NULL, *nskb, *skb;
8503 unsigned char *data;
8506 list_for_each_entry_safe(skb, nskb, &nft_net->notify_list, list) {
8510 len = NLMSG_GOODSIZE - skb->len;
8511 list_del(&skb->list);
8515 if (len > 0 && NFT_CB(skb).report == NFT_CB(batch_skb).report) {
8516 data = skb_put(batch_skb, skb->len);
8517 memcpy(data, skb->data, skb->len);
8518 list_del(&skb->list);
8522 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8523 NFT_CB(batch_skb).report, GFP_KERNEL);
8528 nfnetlink_send(batch_skb, net, portid, NFNLGRP_NFTABLES,
8529 NFT_CB(batch_skb).report, GFP_KERNEL);
8532 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
8535 static int nf_tables_commit_audit_alloc(struct list_head *adl,
8536 struct nft_table *table)
8538 struct nft_audit_data *adp;
8540 list_for_each_entry(adp, adl, list) {
8541 if (adp->table == table)
8544 adp = kzalloc(sizeof(*adp), GFP_KERNEL);
8548 list_add(&adp->list, adl);
8552 static void nf_tables_commit_audit_free(struct list_head *adl)
8554 struct nft_audit_data *adp, *adn;
8556 list_for_each_entry_safe(adp, adn, adl, list) {
8557 list_del(&adp->list);
8562 static void nf_tables_commit_audit_collect(struct list_head *adl,
8563 struct nft_table *table, u32 op)
8565 struct nft_audit_data *adp;
8567 list_for_each_entry(adp, adl, list) {
8568 if (adp->table == table)
8571 WARN_ONCE(1, "table=%s not expected in commit list", table->name);
8575 if (!adp->op || adp->op > op)
8579 #define AUNFTABLENAMELEN (NFT_TABLE_MAXNAMELEN + 22)
8581 static void nf_tables_commit_audit_log(struct list_head *adl, u32 generation)
8583 struct nft_audit_data *adp, *adn;
8584 char aubuf[AUNFTABLENAMELEN];
8586 list_for_each_entry_safe(adp, adn, adl, list) {
8587 snprintf(aubuf, AUNFTABLENAMELEN, "%s:%u", adp->table->name,
8589 audit_log_nfcfg(aubuf, adp->table->family, adp->entries,
8590 nft2audit_op[adp->op], GFP_KERNEL);
8591 list_del(&adp->list);
8596 static int nf_tables_commit(struct net *net, struct sk_buff *skb)
8598 struct nftables_pernet *nft_net = nft_pernet(net);
8599 struct nft_trans *trans, *next;
8600 struct nft_trans_elem *te;
8601 struct nft_chain *chain;
8602 struct nft_table *table;
8606 if (list_empty(&nft_net->commit_list)) {
8607 mutex_unlock(&nft_net->commit_mutex);
8611 /* 0. Validate ruleset, otherwise roll back for error reporting. */
8612 if (nf_tables_validate(net) < 0)
8615 err = nft_flow_rule_offload_commit(net);
8619 /* 1. Allocate space for next generation rules_gen_X[] */
8620 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
8623 ret = nf_tables_commit_audit_alloc(&adl, trans->ctx.table);
8625 nf_tables_commit_chain_prepare_cancel(net);
8626 nf_tables_commit_audit_free(&adl);
8629 if (trans->msg_type == NFT_MSG_NEWRULE ||
8630 trans->msg_type == NFT_MSG_DELRULE) {
8631 chain = trans->ctx.chain;
8633 ret = nf_tables_commit_chain_prepare(net, chain);
8635 nf_tables_commit_chain_prepare_cancel(net);
8636 nf_tables_commit_audit_free(&adl);
8642 /* step 2. Make rules_gen_X visible to packet path */
8643 list_for_each_entry(table, &nft_net->tables, list) {
8644 list_for_each_entry(chain, &table->chains, list)
8645 nf_tables_commit_chain(net, chain);
8649 * Bump generation counter, invalidate any dump in progress.
8650 * Cannot fail after this point.
8652 while (++nft_net->base_seq == 0)
8655 /* step 3. Start new generation, rules_gen_X now in use. */
8656 net->nft.gencursor = nft_gencursor_next(net);
8658 list_for_each_entry_safe(trans, next, &nft_net->commit_list, list) {
8659 nf_tables_commit_audit_collect(&adl, trans->ctx.table,
8661 switch (trans->msg_type) {
8662 case NFT_MSG_NEWTABLE:
8663 if (nft_trans_table_update(trans)) {
8664 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
8665 nft_trans_destroy(trans);
8668 if (trans->ctx.table->flags & NFT_TABLE_F_DORMANT)
8669 nf_tables_table_disable(net, trans->ctx.table);
8671 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
8673 nft_clear(net, trans->ctx.table);
8675 nf_tables_table_notify(&trans->ctx, NFT_MSG_NEWTABLE);
8676 nft_trans_destroy(trans);
8678 case NFT_MSG_DELTABLE:
8679 list_del_rcu(&trans->ctx.table->list);
8680 nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE);
8682 case NFT_MSG_NEWCHAIN:
8683 if (nft_trans_chain_update(trans)) {
8684 nft_chain_commit_update(trans);
8685 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8686 /* trans destroyed after rcu grace period */
8688 nft_chain_commit_drop_policy(trans);
8689 nft_clear(net, trans->ctx.chain);
8690 nf_tables_chain_notify(&trans->ctx, NFT_MSG_NEWCHAIN);
8691 nft_trans_destroy(trans);
8694 case NFT_MSG_DELCHAIN:
8695 nft_chain_del(trans->ctx.chain);
8696 nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN);
8697 nf_tables_unregister_hook(trans->ctx.net,
8701 case NFT_MSG_NEWRULE:
8702 nft_clear(trans->ctx.net, nft_trans_rule(trans));
8703 nf_tables_rule_notify(&trans->ctx,
8704 nft_trans_rule(trans),
8706 nft_trans_destroy(trans);
8708 case NFT_MSG_DELRULE:
8709 list_del_rcu(&nft_trans_rule(trans)->list);
8710 nf_tables_rule_notify(&trans->ctx,
8711 nft_trans_rule(trans),
8713 nft_rule_expr_deactivate(&trans->ctx,
8714 nft_trans_rule(trans),
8717 case NFT_MSG_NEWSET:
8718 nft_clear(net, nft_trans_set(trans));
8719 /* This avoids hitting -EBUSY when deleting the table
8720 * from the transaction.
8722 if (nft_set_is_anonymous(nft_trans_set(trans)) &&
8723 !list_empty(&nft_trans_set(trans)->bindings))
8724 trans->ctx.table->use--;
8726 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
8727 NFT_MSG_NEWSET, GFP_KERNEL);
8728 nft_trans_destroy(trans);
8730 case NFT_MSG_DELSET:
8731 list_del_rcu(&nft_trans_set(trans)->list);
8732 nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
8733 NFT_MSG_DELSET, GFP_KERNEL);
8735 case NFT_MSG_NEWSETELEM:
8736 te = (struct nft_trans_elem *)trans->data;
8738 nft_setelem_activate(net, te->set, &te->elem);
8739 nf_tables_setelem_notify(&trans->ctx, te->set,
8741 NFT_MSG_NEWSETELEM);
8742 nft_trans_destroy(trans);
8744 case NFT_MSG_DELSETELEM:
8745 te = (struct nft_trans_elem *)trans->data;
8747 nf_tables_setelem_notify(&trans->ctx, te->set,
8749 NFT_MSG_DELSETELEM);
8750 nft_setelem_remove(net, te->set, &te->elem);
8751 if (!nft_setelem_is_catchall(te->set, &te->elem)) {
8752 atomic_dec(&te->set->nelems);
8756 case NFT_MSG_NEWOBJ:
8757 if (nft_trans_obj_update(trans)) {
8758 nft_obj_commit_update(trans);
8759 nf_tables_obj_notify(&trans->ctx,
8760 nft_trans_obj(trans),
8763 nft_clear(net, nft_trans_obj(trans));
8764 nf_tables_obj_notify(&trans->ctx,
8765 nft_trans_obj(trans),
8767 nft_trans_destroy(trans);
8770 case NFT_MSG_DELOBJ:
8771 nft_obj_del(nft_trans_obj(trans));
8772 nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
8775 case NFT_MSG_NEWFLOWTABLE:
8776 if (nft_trans_flowtable_update(trans)) {
8777 nft_trans_flowtable(trans)->data.flags =
8778 nft_trans_flowtable_flags(trans);
8779 nf_tables_flowtable_notify(&trans->ctx,
8780 nft_trans_flowtable(trans),
8781 &nft_trans_flowtable_hooks(trans),
8782 NFT_MSG_NEWFLOWTABLE);
8783 list_splice(&nft_trans_flowtable_hooks(trans),
8784 &nft_trans_flowtable(trans)->hook_list);
8786 nft_clear(net, nft_trans_flowtable(trans));
8787 nf_tables_flowtable_notify(&trans->ctx,
8788 nft_trans_flowtable(trans),
8789 &nft_trans_flowtable(trans)->hook_list,
8790 NFT_MSG_NEWFLOWTABLE);
8792 nft_trans_destroy(trans);
8794 case NFT_MSG_DELFLOWTABLE:
8795 if (nft_trans_flowtable_update(trans)) {
8796 nft_flowtable_hooks_del(nft_trans_flowtable(trans),
8797 &nft_trans_flowtable_hooks(trans));
8798 nf_tables_flowtable_notify(&trans->ctx,
8799 nft_trans_flowtable(trans),
8800 &nft_trans_flowtable_hooks(trans),
8801 NFT_MSG_DELFLOWTABLE);
8802 nft_unregister_flowtable_net_hooks(net,
8803 &nft_trans_flowtable_hooks(trans));
8805 list_del_rcu(&nft_trans_flowtable(trans)->list);
8806 nf_tables_flowtable_notify(&trans->ctx,
8807 nft_trans_flowtable(trans),
8808 &nft_trans_flowtable(trans)->hook_list,
8809 NFT_MSG_DELFLOWTABLE);
8810 nft_unregister_flowtable_net_hooks(net,
8811 &nft_trans_flowtable(trans)->hook_list);
8817 nft_commit_notify(net, NETLINK_CB(skb).portid);
8818 nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
8819 nf_tables_commit_audit_log(&adl, nft_net->base_seq);
8820 nf_tables_commit_release(net);
8825 static void nf_tables_module_autoload(struct net *net)
8827 struct nftables_pernet *nft_net = nft_pernet(net);
8828 struct nft_module_request *req, *next;
8829 LIST_HEAD(module_list);
8831 list_splice_init(&nft_net->module_list, &module_list);
8832 mutex_unlock(&nft_net->commit_mutex);
8833 list_for_each_entry_safe(req, next, &module_list, list) {
8834 request_module("%s", req->module);
8837 mutex_lock(&nft_net->commit_mutex);
8838 list_splice(&module_list, &nft_net->module_list);
8841 static void nf_tables_abort_release(struct nft_trans *trans)
8843 switch (trans->msg_type) {
8844 case NFT_MSG_NEWTABLE:
8845 nf_tables_table_destroy(&trans->ctx);
8847 case NFT_MSG_NEWCHAIN:
8848 nf_tables_chain_destroy(&trans->ctx);
8850 case NFT_MSG_NEWRULE:
8851 nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
8853 case NFT_MSG_NEWSET:
8854 nft_set_destroy(&trans->ctx, nft_trans_set(trans));
8856 case NFT_MSG_NEWSETELEM:
8857 nft_set_elem_destroy(nft_trans_elem_set(trans),
8858 nft_trans_elem(trans).priv, true);
8860 case NFT_MSG_NEWOBJ:
8861 nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
8863 case NFT_MSG_NEWFLOWTABLE:
8864 if (nft_trans_flowtable_update(trans))
8865 nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
8867 nf_tables_flowtable_destroy(nft_trans_flowtable(trans));
8873 static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
8875 struct nftables_pernet *nft_net = nft_pernet(net);
8876 struct nft_trans *trans, *next;
8877 struct nft_trans_elem *te;
8878 struct nft_hook *hook;
8880 if (action == NFNL_ABORT_VALIDATE &&
8881 nf_tables_validate(net) < 0)
8884 list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list,
8886 switch (trans->msg_type) {
8887 case NFT_MSG_NEWTABLE:
8888 if (nft_trans_table_update(trans)) {
8889 if (!(trans->ctx.table->flags & __NFT_TABLE_F_UPDATE)) {
8890 nft_trans_destroy(trans);
8893 if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_DORMANT) {
8894 nf_tables_table_disable(net, trans->ctx.table);
8895 trans->ctx.table->flags |= NFT_TABLE_F_DORMANT;
8896 } else if (trans->ctx.table->flags & __NFT_TABLE_F_WAS_AWAKEN) {
8897 trans->ctx.table->flags &= ~NFT_TABLE_F_DORMANT;
8899 trans->ctx.table->flags &= ~__NFT_TABLE_F_UPDATE;
8900 nft_trans_destroy(trans);
8902 list_del_rcu(&trans->ctx.table->list);
8905 case NFT_MSG_DELTABLE:
8906 nft_clear(trans->ctx.net, trans->ctx.table);
8907 nft_trans_destroy(trans);
8909 case NFT_MSG_NEWCHAIN:
8910 if (nft_trans_chain_update(trans)) {
8911 free_percpu(nft_trans_chain_stats(trans));
8912 kfree(nft_trans_chain_name(trans));
8913 nft_trans_destroy(trans);
8915 if (nft_chain_is_bound(trans->ctx.chain)) {
8916 nft_trans_destroy(trans);
8919 trans->ctx.table->use--;
8920 nft_chain_del(trans->ctx.chain);
8921 nf_tables_unregister_hook(trans->ctx.net,
8926 case NFT_MSG_DELCHAIN:
8927 trans->ctx.table->use++;
8928 nft_clear(trans->ctx.net, trans->ctx.chain);
8929 nft_trans_destroy(trans);
8931 case NFT_MSG_NEWRULE:
8932 trans->ctx.chain->use--;
8933 list_del_rcu(&nft_trans_rule(trans)->list);
8934 nft_rule_expr_deactivate(&trans->ctx,
8935 nft_trans_rule(trans),
8937 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
8938 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
8940 case NFT_MSG_DELRULE:
8941 trans->ctx.chain->use++;
8942 nft_clear(trans->ctx.net, nft_trans_rule(trans));
8943 nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
8944 if (trans->ctx.chain->flags & NFT_CHAIN_HW_OFFLOAD)
8945 nft_flow_rule_destroy(nft_trans_flow_rule(trans));
8947 nft_trans_destroy(trans);
8949 case NFT_MSG_NEWSET:
8950 trans->ctx.table->use--;
8951 if (nft_trans_set_bound(trans)) {
8952 nft_trans_destroy(trans);
8955 list_del_rcu(&nft_trans_set(trans)->list);
8957 case NFT_MSG_DELSET:
8958 trans->ctx.table->use++;
8959 nft_clear(trans->ctx.net, nft_trans_set(trans));
8960 nft_trans_destroy(trans);
8962 case NFT_MSG_NEWSETELEM:
8963 if (nft_trans_elem_set_bound(trans)) {
8964 nft_trans_destroy(trans);
8967 te = (struct nft_trans_elem *)trans->data;
8968 nft_setelem_remove(net, te->set, &te->elem);
8969 if (!nft_setelem_is_catchall(te->set, &te->elem))
8970 atomic_dec(&te->set->nelems);
8972 case NFT_MSG_DELSETELEM:
8973 te = (struct nft_trans_elem *)trans->data;
8975 nft_setelem_data_activate(net, te->set, &te->elem);
8976 nft_setelem_activate(net, te->set, &te->elem);
8977 if (!nft_setelem_is_catchall(te->set, &te->elem))
8980 nft_trans_destroy(trans);
8982 case NFT_MSG_NEWOBJ:
8983 if (nft_trans_obj_update(trans)) {
8984 nft_obj_destroy(&trans->ctx, nft_trans_obj_newobj(trans));
8985 nft_trans_destroy(trans);
8987 trans->ctx.table->use--;
8988 nft_obj_del(nft_trans_obj(trans));
8991 case NFT_MSG_DELOBJ:
8992 trans->ctx.table->use++;
8993 nft_clear(trans->ctx.net, nft_trans_obj(trans));
8994 nft_trans_destroy(trans);
8996 case NFT_MSG_NEWFLOWTABLE:
8997 if (nft_trans_flowtable_update(trans)) {
8998 nft_unregister_flowtable_net_hooks(net,
8999 &nft_trans_flowtable_hooks(trans));
9001 trans->ctx.table->use--;
9002 list_del_rcu(&nft_trans_flowtable(trans)->list);
9003 nft_unregister_flowtable_net_hooks(net,
9004 &nft_trans_flowtable(trans)->hook_list);
9007 case NFT_MSG_DELFLOWTABLE:
9008 if (nft_trans_flowtable_update(trans)) {
9009 list_for_each_entry(hook, &nft_trans_flowtable(trans)->hook_list, list)
9010 hook->inactive = false;
9012 trans->ctx.table->use++;
9013 nft_clear(trans->ctx.net, nft_trans_flowtable(trans));
9015 nft_trans_destroy(trans);
9022 list_for_each_entry_safe_reverse(trans, next,
9023 &nft_net->commit_list, list) {
9024 list_del(&trans->list);
9025 nf_tables_abort_release(trans);
9028 if (action == NFNL_ABORT_AUTOLOAD)
9029 nf_tables_module_autoload(net);
9031 nf_tables_module_autoload_cleanup(net);
9036 static void nf_tables_cleanup(struct net *net)
9038 nft_validate_state_update(net, NFT_VALIDATE_SKIP);
9041 static int nf_tables_abort(struct net *net, struct sk_buff *skb,
9042 enum nfnl_abort_action action)
9044 struct nftables_pernet *nft_net = nft_pernet(net);
9045 int ret = __nf_tables_abort(net, action);
9047 mutex_unlock(&nft_net->commit_mutex);
9052 static bool nf_tables_valid_genid(struct net *net, u32 genid)
9054 struct nftables_pernet *nft_net = nft_pernet(net);
9057 mutex_lock(&nft_net->commit_mutex);
9059 genid_ok = genid == 0 || nft_net->base_seq == genid;
9061 mutex_unlock(&nft_net->commit_mutex);
9063 /* else, commit mutex has to be released by commit or abort function */
9067 static const struct nfnetlink_subsystem nf_tables_subsys = {
9068 .name = "nf_tables",
9069 .subsys_id = NFNL_SUBSYS_NFTABLES,
9070 .cb_count = NFT_MSG_MAX,
9072 .commit = nf_tables_commit,
9073 .abort = nf_tables_abort,
9074 .cleanup = nf_tables_cleanup,
9075 .valid_genid = nf_tables_valid_genid,
9076 .owner = THIS_MODULE,
9079 int nft_chain_validate_dependency(const struct nft_chain *chain,
9080 enum nft_chain_types type)
9082 const struct nft_base_chain *basechain;
9084 if (nft_is_base_chain(chain)) {
9085 basechain = nft_base_chain(chain);
9086 if (basechain->type->type != type)
9091 EXPORT_SYMBOL_GPL(nft_chain_validate_dependency);
9093 int nft_chain_validate_hooks(const struct nft_chain *chain,
9094 unsigned int hook_flags)
9096 struct nft_base_chain *basechain;
9098 if (nft_is_base_chain(chain)) {
9099 basechain = nft_base_chain(chain);
9101 if ((1 << basechain->ops.hooknum) & hook_flags)
9109 EXPORT_SYMBOL_GPL(nft_chain_validate_hooks);
9112 * Loop detection - walk through the ruleset beginning at the destination chain
9113 * of a new jump until either the source chain is reached (loop) or all
9114 * reachable chains have been traversed.
9116 * The loop check is performed whenever a new jump verdict is added to an
9117 * expression or verdict map or a verdict map is bound to a new chain.
9120 static int nf_tables_check_loops(const struct nft_ctx *ctx,
9121 const struct nft_chain *chain);
9123 static int nft_check_loops(const struct nft_ctx *ctx,
9124 const struct nft_set_ext *ext)
9126 const struct nft_data *data;
9129 data = nft_set_ext_data(ext);
9130 switch (data->verdict.code) {
9133 ret = nf_tables_check_loops(ctx, data->verdict.chain);
9143 static int nf_tables_loop_check_setelem(const struct nft_ctx *ctx,
9144 struct nft_set *set,
9145 const struct nft_set_iter *iter,
9146 struct nft_set_elem *elem)
9148 const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv);
9150 if (nft_set_ext_exists(ext, NFT_SET_EXT_FLAGS) &&
9151 *nft_set_ext_flags(ext) & NFT_SET_ELEM_INTERVAL_END)
9154 return nft_check_loops(ctx, ext);
9157 static int nft_set_catchall_loops(const struct nft_ctx *ctx,
9158 struct nft_set *set)
9160 u8 genmask = nft_genmask_next(ctx->net);
9161 struct nft_set_elem_catchall *catchall;
9162 struct nft_set_ext *ext;
9165 list_for_each_entry_rcu(catchall, &set->catchall_list, list) {
9166 ext = nft_set_elem_ext(set, catchall->elem);
9167 if (!nft_set_elem_active(ext, genmask))
9170 ret = nft_check_loops(ctx, ext);
9178 static int nf_tables_check_loops(const struct nft_ctx *ctx,
9179 const struct nft_chain *chain)
9181 const struct nft_rule *rule;
9182 const struct nft_expr *expr, *last;
9183 struct nft_set *set;
9184 struct nft_set_binding *binding;
9185 struct nft_set_iter iter;
9187 if (ctx->chain == chain)
9190 list_for_each_entry(rule, &chain->rules, list) {
9191 nft_rule_for_each_expr(expr, last, rule) {
9192 struct nft_immediate_expr *priv;
9193 const struct nft_data *data;
9196 if (strcmp(expr->ops->type->name, "immediate"))
9199 priv = nft_expr_priv(expr);
9200 if (priv->dreg != NFT_REG_VERDICT)
9204 switch (data->verdict.code) {
9207 err = nf_tables_check_loops(ctx,
9208 data->verdict.chain);
9218 list_for_each_entry(set, &ctx->table->sets, list) {
9219 if (!nft_is_active_next(ctx->net, set))
9221 if (!(set->flags & NFT_SET_MAP) ||
9222 set->dtype != NFT_DATA_VERDICT)
9225 list_for_each_entry(binding, &set->bindings, list) {
9226 if (!(binding->flags & NFT_SET_MAP) ||
9227 binding->chain != chain)
9230 iter.genmask = nft_genmask_next(ctx->net);
9234 iter.fn = nf_tables_loop_check_setelem;
9236 set->ops->walk(ctx, set, &iter);
9238 iter.err = nft_set_catchall_loops(ctx, set);
9249 * nft_parse_u32_check - fetch u32 attribute and check for maximum value
9251 * @attr: netlink attribute to fetch value from
9252 * @max: maximum value to be stored in dest
9253 * @dest: pointer to the variable
9255 * Parse, check and store a given u32 netlink attribute into variable.
9256 * This function returns -ERANGE if the value goes over maximum value.
9257 * Otherwise a 0 is returned and the attribute value is stored in the
9258 * destination variable.
9260 int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
9264 val = ntohl(nla_get_be32(attr));
9271 EXPORT_SYMBOL_GPL(nft_parse_u32_check);
9273 static unsigned int nft_parse_register(const struct nlattr *attr)
9277 reg = ntohl(nla_get_be32(attr));
9279 case NFT_REG_VERDICT...NFT_REG_4:
9280 return reg * NFT_REG_SIZE / NFT_REG32_SIZE;
9282 return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
9287 * nft_dump_register - dump a register value to a netlink attribute
9289 * @skb: socket buffer
9290 * @attr: attribute number
9291 * @reg: register number
9293 * Construct a netlink attribute containing the register number. For
9294 * compatibility reasons, register numbers being a multiple of 4 are
9295 * translated to the corresponding 128 bit register numbers.
9297 int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg)
9299 if (reg % (NFT_REG_SIZE / NFT_REG32_SIZE) == 0)
9300 reg = reg / (NFT_REG_SIZE / NFT_REG32_SIZE);
9302 reg = reg - NFT_REG_SIZE / NFT_REG32_SIZE + NFT_REG32_00;
9304 return nla_put_be32(skb, attr, htonl(reg));
9306 EXPORT_SYMBOL_GPL(nft_dump_register);
9308 static int nft_validate_register_load(enum nft_registers reg, unsigned int len)
9310 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
9314 if (reg * NFT_REG32_SIZE + len > sizeof_field(struct nft_regs, data))
9320 int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
9325 reg = nft_parse_register(attr);
9326 err = nft_validate_register_load(reg, len);
9333 EXPORT_SYMBOL_GPL(nft_parse_register_load);
9335 static int nft_validate_register_store(const struct nft_ctx *ctx,
9336 enum nft_registers reg,
9337 const struct nft_data *data,
9338 enum nft_data_types type,
9344 case NFT_REG_VERDICT:
9345 if (type != NFT_DATA_VERDICT)
9349 (data->verdict.code == NFT_GOTO ||
9350 data->verdict.code == NFT_JUMP)) {
9351 err = nf_tables_check_loops(ctx, data->verdict.chain);
9358 if (reg < NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE)
9362 if (reg * NFT_REG32_SIZE + len >
9363 sizeof_field(struct nft_regs, data))
9366 if (data != NULL && type != NFT_DATA_VALUE)
9372 int nft_parse_register_store(const struct nft_ctx *ctx,
9373 const struct nlattr *attr, u8 *dreg,
9374 const struct nft_data *data,
9375 enum nft_data_types type, unsigned int len)
9380 reg = nft_parse_register(attr);
9381 err = nft_validate_register_store(ctx, reg, data, type, len);
9388 EXPORT_SYMBOL_GPL(nft_parse_register_store);
9390 static const struct nla_policy nft_verdict_policy[NFTA_VERDICT_MAX + 1] = {
9391 [NFTA_VERDICT_CODE] = { .type = NLA_U32 },
9392 [NFTA_VERDICT_CHAIN] = { .type = NLA_STRING,
9393 .len = NFT_CHAIN_MAXNAMELEN - 1 },
9394 [NFTA_VERDICT_CHAIN_ID] = { .type = NLA_U32 },
9397 static int nft_verdict_init(const struct nft_ctx *ctx, struct nft_data *data,
9398 struct nft_data_desc *desc, const struct nlattr *nla)
9400 u8 genmask = nft_genmask_next(ctx->net);
9401 struct nlattr *tb[NFTA_VERDICT_MAX + 1];
9402 struct nft_chain *chain;
9405 err = nla_parse_nested_deprecated(tb, NFTA_VERDICT_MAX, nla,
9406 nft_verdict_policy, NULL);
9410 if (!tb[NFTA_VERDICT_CODE])
9412 data->verdict.code = ntohl(nla_get_be32(tb[NFTA_VERDICT_CODE]));
9414 switch (data->verdict.code) {
9416 switch (data->verdict.code & NF_VERDICT_MASK) {
9431 if (tb[NFTA_VERDICT_CHAIN]) {
9432 chain = nft_chain_lookup(ctx->net, ctx->table,
9433 tb[NFTA_VERDICT_CHAIN],
9435 } else if (tb[NFTA_VERDICT_CHAIN_ID]) {
9436 chain = nft_chain_lookup_byid(ctx->net,
9437 tb[NFTA_VERDICT_CHAIN_ID]);
9439 return PTR_ERR(chain);
9445 return PTR_ERR(chain);
9446 if (nft_is_base_chain(chain))
9450 data->verdict.chain = chain;
9454 desc->len = sizeof(data->verdict);
9455 desc->type = NFT_DATA_VERDICT;
9459 static void nft_verdict_uninit(const struct nft_data *data)
9461 struct nft_chain *chain;
9462 struct nft_rule *rule;
9464 switch (data->verdict.code) {
9467 chain = data->verdict.chain;
9470 if (!nft_chain_is_bound(chain))
9473 chain->table->use--;
9474 list_for_each_entry(rule, &chain->rules, list)
9477 nft_chain_del(chain);
9482 int nft_verdict_dump(struct sk_buff *skb, int type, const struct nft_verdict *v)
9484 struct nlattr *nest;
9486 nest = nla_nest_start_noflag(skb, type);
9488 goto nla_put_failure;
9490 if (nla_put_be32(skb, NFTA_VERDICT_CODE, htonl(v->code)))
9491 goto nla_put_failure;
9496 if (nla_put_string(skb, NFTA_VERDICT_CHAIN,
9498 goto nla_put_failure;
9500 nla_nest_end(skb, nest);
9507 static int nft_value_init(const struct nft_ctx *ctx,
9508 struct nft_data *data, unsigned int size,
9509 struct nft_data_desc *desc, const struct nlattr *nla)
9519 nla_memcpy(data->data, nla, len);
9520 desc->type = NFT_DATA_VALUE;
9525 static int nft_value_dump(struct sk_buff *skb, const struct nft_data *data,
9528 return nla_put(skb, NFTA_DATA_VALUE, len, data->data);
9531 static const struct nla_policy nft_data_policy[NFTA_DATA_MAX + 1] = {
9532 [NFTA_DATA_VALUE] = { .type = NLA_BINARY },
9533 [NFTA_DATA_VERDICT] = { .type = NLA_NESTED },
9537 * nft_data_init - parse nf_tables data netlink attributes
9539 * @ctx: context of the expression using the data
9540 * @data: destination struct nft_data
9541 * @size: maximum data length
9542 * @desc: data description
9543 * @nla: netlink attribute containing data
9545 * Parse the netlink data attributes and initialize a struct nft_data.
9546 * The type and length of data are returned in the data description.
9548 * The caller can indicate that it only wants to accept data of type
9549 * NFT_DATA_VALUE by passing NULL for the ctx argument.
9551 int nft_data_init(const struct nft_ctx *ctx,
9552 struct nft_data *data, unsigned int size,
9553 struct nft_data_desc *desc, const struct nlattr *nla)
9555 struct nlattr *tb[NFTA_DATA_MAX + 1];
9558 err = nla_parse_nested_deprecated(tb, NFTA_DATA_MAX, nla,
9559 nft_data_policy, NULL);
9563 if (tb[NFTA_DATA_VALUE])
9564 return nft_value_init(ctx, data, size, desc,
9565 tb[NFTA_DATA_VALUE]);
9566 if (tb[NFTA_DATA_VERDICT] && ctx != NULL)
9567 return nft_verdict_init(ctx, data, desc, tb[NFTA_DATA_VERDICT]);
9570 EXPORT_SYMBOL_GPL(nft_data_init);
9573 * nft_data_release - release a nft_data item
9575 * @data: struct nft_data to release
9576 * @type: type of data
9578 * Release a nft_data item. NFT_DATA_VALUE types can be silently discarded,
9579 * all others need to be released by calling this function.
9581 void nft_data_release(const struct nft_data *data, enum nft_data_types type)
9583 if (type < NFT_DATA_VERDICT)
9586 case NFT_DATA_VERDICT:
9587 return nft_verdict_uninit(data);
9592 EXPORT_SYMBOL_GPL(nft_data_release);
9594 int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data,
9595 enum nft_data_types type, unsigned int len)
9597 struct nlattr *nest;
9600 nest = nla_nest_start_noflag(skb, attr);
9605 case NFT_DATA_VALUE:
9606 err = nft_value_dump(skb, data, len);
9608 case NFT_DATA_VERDICT:
9609 err = nft_verdict_dump(skb, NFTA_DATA_VERDICT, &data->verdict);
9616 nla_nest_end(skb, nest);
9619 EXPORT_SYMBOL_GPL(nft_data_dump);
9621 int __nft_release_basechain(struct nft_ctx *ctx)
9623 struct nft_rule *rule, *nr;
9625 if (WARN_ON(!nft_is_base_chain(ctx->chain)))
9628 nf_tables_unregister_hook(ctx->net, ctx->chain->table, ctx->chain);
9629 list_for_each_entry_safe(rule, nr, &ctx->chain->rules, list) {
9630 list_del(&rule->list);
9632 nf_tables_rule_release(ctx, rule);
9634 nft_chain_del(ctx->chain);
9636 nf_tables_chain_destroy(ctx);
9640 EXPORT_SYMBOL_GPL(__nft_release_basechain);
9642 static void __nft_release_hook(struct net *net, struct nft_table *table)
9644 struct nft_flowtable *flowtable;
9645 struct nft_chain *chain;
9647 list_for_each_entry(chain, &table->chains, list)
9648 nf_tables_unregister_hook(net, table, chain);
9649 list_for_each_entry(flowtable, &table->flowtables, list)
9650 nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list);
9653 static void __nft_release_hooks(struct net *net)
9655 struct nftables_pernet *nft_net = nft_pernet(net);
9656 struct nft_table *table;
9658 list_for_each_entry(table, &nft_net->tables, list) {
9659 if (nft_table_has_owner(table))
9662 __nft_release_hook(net, table);
9666 static void __nft_release_table(struct net *net, struct nft_table *table)
9668 struct nft_flowtable *flowtable, *nf;
9669 struct nft_chain *chain, *nc;
9670 struct nft_object *obj, *ne;
9671 struct nft_rule *rule, *nr;
9672 struct nft_set *set, *ns;
9673 struct nft_ctx ctx = {
9675 .family = NFPROTO_NETDEV,
9678 ctx.family = table->family;
9680 list_for_each_entry(chain, &table->chains, list) {
9682 list_for_each_entry_safe(rule, nr, &chain->rules, list) {
9683 list_del(&rule->list);
9685 nf_tables_rule_release(&ctx, rule);
9688 list_for_each_entry_safe(flowtable, nf, &table->flowtables, list) {
9689 list_del(&flowtable->list);
9691 nf_tables_flowtable_destroy(flowtable);
9693 list_for_each_entry_safe(set, ns, &table->sets, list) {
9694 list_del(&set->list);
9696 nft_set_destroy(&ctx, set);
9698 list_for_each_entry_safe(obj, ne, &table->objects, list) {
9701 nft_obj_destroy(&ctx, obj);
9703 list_for_each_entry_safe(chain, nc, &table->chains, list) {
9705 nft_chain_del(chain);
9707 nf_tables_chain_destroy(&ctx);
9709 nf_tables_table_destroy(&ctx);
9712 static void __nft_release_tables(struct net *net)
9714 struct nftables_pernet *nft_net = nft_pernet(net);
9715 struct nft_table *table, *nt;
9717 list_for_each_entry_safe(table, nt, &nft_net->tables, list) {
9718 if (nft_table_has_owner(table))
9721 list_del(&table->list);
9723 __nft_release_table(net, table);
9727 static int nft_rcv_nl_event(struct notifier_block *this, unsigned long event,
9730 struct nft_table *table, *to_delete[8];
9731 struct nftables_pernet *nft_net;
9732 struct netlink_notify *n = ptr;
9733 struct net *net = n->net;
9734 unsigned int deleted;
9735 bool restart = false;
9737 if (event != NETLINK_URELEASE || n->protocol != NETLINK_NETFILTER)
9740 nft_net = nft_pernet(net);
9742 mutex_lock(&nft_net->commit_mutex);
9744 list_for_each_entry(table, &nft_net->tables, list) {
9745 if (nft_table_has_owner(table) &&
9746 n->portid == table->nlpid) {
9747 __nft_release_hook(net, table);
9748 list_del_rcu(&table->list);
9749 to_delete[deleted++] = table;
9750 if (deleted >= ARRAY_SIZE(to_delete))
9755 restart = deleted >= ARRAY_SIZE(to_delete);
9758 __nft_release_table(net, to_delete[--deleted]);
9763 mutex_unlock(&nft_net->commit_mutex);
9768 static struct notifier_block nft_nl_notifier = {
9769 .notifier_call = nft_rcv_nl_event,
9772 static int __net_init nf_tables_init_net(struct net *net)
9774 struct nftables_pernet *nft_net = nft_pernet(net);
9776 INIT_LIST_HEAD(&nft_net->tables);
9777 INIT_LIST_HEAD(&nft_net->commit_list);
9778 INIT_LIST_HEAD(&nft_net->module_list);
9779 INIT_LIST_HEAD(&nft_net->notify_list);
9780 mutex_init(&nft_net->commit_mutex);
9781 nft_net->base_seq = 1;
9782 nft_net->validate_state = NFT_VALIDATE_SKIP;
9787 static void __net_exit nf_tables_pre_exit_net(struct net *net)
9789 __nft_release_hooks(net);
9792 static void __net_exit nf_tables_exit_net(struct net *net)
9794 struct nftables_pernet *nft_net = nft_pernet(net);
9796 mutex_lock(&nft_net->commit_mutex);
9797 if (!list_empty(&nft_net->commit_list))
9798 __nf_tables_abort(net, NFNL_ABORT_NONE);
9799 __nft_release_tables(net);
9800 mutex_unlock(&nft_net->commit_mutex);
9801 WARN_ON_ONCE(!list_empty(&nft_net->tables));
9802 WARN_ON_ONCE(!list_empty(&nft_net->module_list));
9803 WARN_ON_ONCE(!list_empty(&nft_net->notify_list));
9806 static struct pernet_operations nf_tables_net_ops = {
9807 .init = nf_tables_init_net,
9808 .pre_exit = nf_tables_pre_exit_net,
9809 .exit = nf_tables_exit_net,
9810 .id = &nf_tables_net_id,
9811 .size = sizeof(struct nftables_pernet),
9814 static int __init nf_tables_module_init(void)
9818 err = register_pernet_subsys(&nf_tables_net_ops);
9822 err = nft_chain_filter_init();
9824 goto err_chain_filter;
9826 err = nf_tables_core_module_init();
9828 goto err_core_module;
9830 err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
9832 goto err_netdev_notifier;
9834 err = rhltable_init(&nft_objname_ht, &nft_objname_ht_params);
9836 goto err_rht_objname;
9838 err = nft_offload_init();
9842 err = netlink_register_notifier(&nft_nl_notifier);
9844 goto err_netlink_notifier;
9847 err = nfnetlink_subsys_register(&nf_tables_subsys);
9849 goto err_nfnl_subsys;
9851 nft_chain_route_init();
9856 netlink_unregister_notifier(&nft_nl_notifier);
9857 err_netlink_notifier:
9860 rhltable_destroy(&nft_objname_ht);
9862 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
9863 err_netdev_notifier:
9864 nf_tables_core_module_exit();
9866 nft_chain_filter_fini();
9868 unregister_pernet_subsys(&nf_tables_net_ops);
9872 static void __exit nf_tables_module_exit(void)
9874 nfnetlink_subsys_unregister(&nf_tables_subsys);
9875 netlink_unregister_notifier(&nft_nl_notifier);
9877 unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
9878 nft_chain_filter_fini();
9879 nft_chain_route_fini();
9880 unregister_pernet_subsys(&nf_tables_net_ops);
9881 cancel_work_sync(&trans_destroy_work);
9883 rhltable_destroy(&nft_objname_ht);
9884 nf_tables_core_module_exit();
9887 module_init(nf_tables_module_init);
9888 module_exit(nf_tables_module_exit);
9890 MODULE_LICENSE("GPL");
9891 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
9892 MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);